* [PATCH 1 of 20] ipath - core driver header files
2006-03-10 0:35 [PATCH 0 of 20] [RFC] ipath driver - another round for review Bryan O'Sullivan
@ 2006-03-10 0:35 ` Bryan O'Sullivan
2006-03-10 0:35 ` [PATCH 2 of 20] ipath - core device driver Bryan O'Sullivan
` (19 subsequent siblings)
20 siblings, 0 replies; 70+ messages in thread
From: Bryan O'Sullivan @ 2006-03-10 0:35 UTC (permalink / raw)
To: rolandd, gregkh, akpm, davem; +Cc: linux-kernel, openib-general
Signed-off-by: Bryan O'Sullivan <bos@pathscale.com>
diff -r d4136de1a941 -r 2a9e52d59741 drivers/infiniband/hw/ipath/ipath_common.h
--- /dev/null Thu Jan 1 00:00:00 1970 +0000
+++ b/drivers/infiniband/hw/ipath/ipath_common.h Thu Mar 9 16:15:10 2006 -0800
@@ -0,0 +1,582 @@
+/*
+ * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef _IPATH_COMMON_H
+#define _IPATH_COMMON_H
+
+/*
+ * This file contains defines, structures, etc. that are used
+ * to communicate between kernel and user code.
+ */
+
+/* This is the IEEE-assigned OUI for PathScale, Inc. */
+#define IPATH_SRC_OUI_1 0x00
+#define IPATH_SRC_OUI_2 0x11
+#define IPATH_SRC_OUI_3 0x75
+
+/* version of protocol header (known to chip also). In the long run,
+ * we should be able to generate and accept a range of version numbers;
+ * for now we only accept one, and it's compiled in.
+ */
+#define IPS_PROTO_VERSION 2
+
+/*
+ * These are compile time constants that you may want to enable or disable
+ * if you are trying to debug problems with code or performance.
+ * IPATH_VERBOSE_TRACING define as 1 if you want additional tracing in
+ * fastpath code
+ * IPATH_TRACE_REGWRITES define as 1 if you want register writes to be
+ * traced in faspath code
+ * _IPATH_TRACING define as 0 if you want to remove all tracing in a
+ * compilation unit
+ * _IPATH_DEBUGGING define as 0 if you want to remove debug prints
+ */
+
+/*
+ * The value in the BTH QP field that InfiniPath uses to differentiate
+ * an infinipath protocol IB packet vs standard IB transport
+ */
+#define IPATH_KD_QP 0x656b79
+
+/*
+ * valid states passed to ipath_set_linkstate() user call
+ */
+#define IPATH_IB_LINKDOWN 0
+#define IPATH_IB_LINKARM 1
+#define IPATH_IB_LINKACTIVE 2
+#define IPATH_IB_LINKINIT 3
+#define IPATH_IB_LINKDOWN_SLEEP 4
+#define IPATH_IB_LINKDOWN_DISABLE 5
+
+/*
+ * stats maintained by the driver. For now, at least, this is global
+ * to all minor devices.
+ */
+struct infinipath_stats {
+ __u64 sps_ints; /* number of interrupts taken */
+ __u64 sps_errints; /* number of interrupts for errors */
+ /* number of errors from chip (not including packet errors or CRC) */
+ __u64 sps_errs;
+ /* number of packet errors from chip other than CRC */
+ __u64 sps_pkterrs;
+ /* number of packets with CRC errors (ICRC and VCRC) */
+ __u64 sps_crcerrs;
+ /* number of hardware errors reported (parity, etc.) */
+ __u64 sps_hwerrs;
+ /* number of times IB link changed state unexpectedly */
+ __u64 sps_iblink;
+ __u64 sps_unused3; /* no longer used; left for compatibility */
+ __u64 sps_port0pkts; /* number of kernel (port0) packets received */
+ /* number of "ethernet" packets sent by driver */
+ __u64 sps_ether_spkts;
+ /* number of "ethernet" packets received by driver */
+ __u64 sps_ether_rpkts;
+ __u64 sps_sma_spkts; /* number of SMA packets sent by driver */
+ __u64 sps_sma_rpkts; /* number of SMA packets received by driver */
+ /* number of times all ports rcvhdrq was full and packet dropped */
+ __u64 sps_hdrqfull;
+ /* number of times all ports egrtid was full and packet dropped */
+ __u64 sps_etidfull;
+ /*
+ * number of times we tried to send from driver, but no pio
+ * buffers avail
+ */
+ __u64 sps_nopiobufs;
+ __u64 sps_ports; /* number of ports currently open */
+ /* list of pkeys (other than default) accepted (0 means not set) */
+ __u16 sps_pkeys[4];
+ /* lids for up to 4 infinipaths, indexed by infinipath # */
+ __u16 sps_lid[4];
+ /* number of user ports per chip (not IB ports) */
+ __u32 sps_nports;
+ __u32 sps_nullintr; /* not our interrupt, or already handled */
+ __u32 sps_maxpkts_call; /* max number of packets handled per receive call */
+ __u32 sps_avgpkts_call; /* avg number of packets handled per receive call */
+ __u64 sps_pagelocks; /* total number of pages locked */
+ __u64 sps_pageunlocks; /* total number of pages unlocked */
+ /*
+ * Number of packets dropped in kernel other than errors
+ * (ether packets if ipath not configured, sma/mad, etc.)
+ */
+ __u64 sps_krdrops;
+ /* mlids for up to 4 infinipaths, indexed by infinipath # */
+ __u16 sps_mlid[4];
+ __u64 __sps_pad[45]; /* pad for future growth */
+};
+
+/*
+ * These are the status bits readable (in ascii form, 64bit value)
+ * from the "status" sysfs file.
+ */
+#define IPATH_STATUS_INITTED 0x1 /* basic driver initialization done */
+#define IPATH_STATUS_DISABLED 0x2 /* hardware disabled */
+#define IPATH_STATUS_UNUSED 0x4 /* available */
+#define IPATH_STATUS_OIB_SMA 0x8 /* ipath_mad kernel SMA running */
+#define IPATH_STATUS_SMA 0x10 /* user SMA running */
+/* Chip has been found and initted */
+#define IPATH_STATUS_CHIP_PRESENT 0x20
+#define IPATH_STATUS_IB_READY 0x40 /* IB link is at ACTIVE, has LID,
+ * usable for all VL's */
+/* after link up, LID,MTU,etc. has been configured */
+#define IPATH_STATUS_IB_CONF 0x80
+/* no link established, probably no cable */
+#define IPATH_STATUS_IB_NOCABLE 0x100
+/* A Fatal hardware error has occurred. */
+#define IPATH_STATUS_HWERROR 0x200
+
+/* The list of usermode accessible registers. Also see Reg_* later in file */
+typedef enum _ipath_ureg {
+ ur_rcvhdrtail = 0, /* (RO) DMA RcvHdr to be used next. */
+ /* (RW) RcvHdr entry to be processed next by host. */
+ ur_rcvhdrhead = 1,
+ ur_rcvegrindextail = 2, /* (RO) Index of next Eager index to use. */
+ ur_rcvegrindexhead = 3, /* (RW) Eager TID to be processed next */
+ /* For internal use only; max register number. */
+ _IPATH_UregMax
+} ipath_ureg;
+
+/* bit values for spi_runtime_flags */
+#define IPATH_RUNTIME_HT 0x1
+#define IPATH_RUNTIME_PCIE 0x2
+#define IPATH_RUNTIME_FORCE_WC_ORDER 0x4
+#define IPATH_RUNTIME_RCVHDR_COPY 0x8
+
+/*
+ * This structure is returned by ipath_userinit() immediately after
+ * open to get implementation-specific info, and info specific to this
+ * instance.
+ *
+ * This struct must have explict pad fields where type sizes
+ * may result in different alignments between 32 and 64 bit
+ * programs, since the 64 bit * bit kernel requires the user code
+ * to have matching offsets
+ */
+struct ipath_base_info {
+ /* version of hardware, for feature checking. */
+ __u32 spi_hw_version;
+ /* version of software, for feature checking. */
+ __u32 spi_sw_version;
+ /* InfiniPath port assigned, goes into sent packets */
+ __u32 spi_port;
+ /*
+ * IB MTU, packets IB data must be less than this.
+ * The MTU is in bytes, and will be a multiple of 4 bytes.
+ */
+ __u32 spi_mtu;
+ /*
+ * size of a PIO buffer. Any given packet's total
+ * size must be less than this (in words). Included is the
+ * starting control word, so if 513 is returned, then total
+ * pkt size is 512 words or less.
+ */
+ __u32 spi_piosize;
+ /* size of the TID cache in infinipath, in entries */
+ __u32 spi_tidcnt;
+ /* size of the TID Eager list in infinipath, in entries */
+ __u32 spi_tidegrcnt;
+ /* size of a single receive header queue entry. */
+ __u32 spi_rcvhdrent_size;
+ /* Count of receive header queue entries allocated.
+ * This may be less than the spu_rcvhdrcnt passed in!.
+ */
+ __u32 spi_rcvhdr_cnt;
+
+ /* per-chip and other runtime features bitmap (IPATH_RUNTIME_*) */
+ __u32 spi_runtime_flags;
+
+ /* address where receive buffer queue is mapped into */
+ __u64 spi_rcvhdr_base;
+
+ /* user program. */
+
+ /* base address of eager TID receive buffers. */
+ __u64 spi_rcv_egrbufs;
+
+ /* Allocated by initialization code, not by protocol. */
+
+ /* size of each TID buffer in host memory,
+ * starting at spi_rcv_egrbufs. The buffers are virtually contiguous
+ */
+ __u32 spi_rcv_egrbufsize;
+ /*
+ * The special QP (queue pair) value that identifies an infinipath
+ * protocol packet from standard IB packets. More, probably much
+ * more, to be added.
+ */
+ __u32 spi_qpair;
+
+ /*
+ * user register base for init code, not to be used directly by
+ * protocol or applications
+ */
+ __u64 __spi_uregbase;
+ /*
+ * maximum buffer size in bytes that can be used in a
+ * single TID entry (assuming the buffer is aligned to this boundary).
+ * This is the minimum of what the hardware and software support
+ * Guaranteed to be a power of 2.
+ */
+ __u32 spi_tid_maxsize;
+ /*
+ * alignment of each pio send buffer (byte count
+ * to add to spi_piobufbase to get to second buffer)
+ */
+ __u32 spi_pioalign;
+ /*
+ * the index of the first pio buffer available
+ * to this process; needed to do lookup in spi_pioavailaddr; not added
+ * to spi_piobufbase
+ */
+ __u32 spi_pioindex;
+ __u32 spi_piocnt; /* number of buffers mapped for this process */
+
+ /*
+ * base address of writeonly pio buffers for this process.
+ * Each buffer has spi_piosize words, and is aligned on spi_pioalign
+ * boundaries. spi_piocnt buffers are mapped from this address
+ */
+ __u64 spi_piobufbase;
+
+ /*
+ * base address of readonly memory copy of the pioavail registers.
+ * There are 2 bits for each buffer.
+ */
+ __u64 spi_pioavailaddr;
+
+ /*
+ * Address where driver updates a copy
+ * of the interface and driver status (IPATH_STATUS_*) as a 64 bit value
+ * It's followed by a string indicating hardware error, if there was one
+ */
+ __u64 spi_status;
+
+ /* number of chip ports available to user processes */
+ __u32 spi_nports;
+ __u32 spi_unit; /* unit number of chip we are using */
+ __u32 spi_rcv_egrperchunk; /* num bufs in each contiguous set */
+ /* size in bytes of each contiguous set */
+ __u32 spi_rcv_egrchunksize;
+ /* total size of mmap to cover full rcvegrbuffers */
+ __u32 spi_rcv_egrbuftotlen;
+} __attribute__ ((aligned(8)));
+
+
+/*
+ * This version number is given to the driver by the user code during
+ * initialization in the spu_userversion field of ipath_user_info, so
+ * the driver can check for compatibility with user code.
+ *
+ * The major version changes when data structures
+ * change in an incompatible way. The driver must be the same or higher
+ * for initialization to succeed. In some cases, a higher version
+ * driver will not interoperate with older software, and initialization
+ * will return an error.
+ */
+#define IPATH_USER_SWMAJOR 1
+
+/*
+ * Minor version differences are always compatible
+ * a within a major version, however if if user software is larger
+ * than driver software, some new features and/or structure fields
+ * may not be implemented; the user code must deal with this if it
+ * cares, or it must abort after initialization reports the difference
+ */
+#define IPATH_USER_SWMINOR 2
+
+#define IPATH_USER_SWVERSION ((IPATH_USER_SWMAJOR<<16) | IPATH_USER_SWMINOR)
+
+#define IPATH_KERN_TYPE 0
+
+/* Similarly, this is the kernel version going back to the user. It's slightly
+ * different, in that we want to tell if the driver was built as part of a
+ * PathScale release, or from the driver from OpenIB, kernel.org, or a
+ * standard distribution, for support reasons. The high bit is 0 for
+ * non-PathScale, and 1 for PathScale-built/supplied.
+ *
+ * It's returned by the driver to the user code during initialization
+ * in the spi_sw_version field of ipath_base_info, so the user code can
+ * in turn check for compatibility with the kernel.
+*/
+#define IPATH_KERN_SWVERSION ((IPATH_KERN_TYPE<<31) | IPATH_USER_SWVERSION)
+
+/*
+ * This structure is passed to ipath_userinit() to tell the driver where
+ * user code buffers are, sizes, etc. The offsets and sizes of the
+ * fields must remain unchanged, for binary compatibility. It can
+ * be extended, if userversion is changed so user code can tell, if needed
+ */
+struct ipath_user_info {
+ /*
+ * version of user software, to detect compatibility issues.
+ * Should be set to IPATH_USER_SWVERSION.
+ */
+ __u32 spu_userversion;
+
+ /* desired number of receive header queue entries */
+ __u32 spu_rcvhdrcnt;
+
+ /* size of struct base_info to write to */
+ __u32 spu_base_info_size;
+
+ /*
+ * number of words in KD protocol header
+ * This tells InfiniPath how many words to copy to rcvhdrq. If 0,
+ * kernel uses a default. Once set, attempts to set any other value
+ * are an error (EAGAIN) until driver is reloaded.
+ */
+ __u32 spu_rcvhdrsize;
+
+ /*
+ * cache line aligned (64 byte) user address to
+ * which the rcvhdrtail register will be written by infinipath
+ * whenever it changes, so that no chip registers are read in
+ * the performance path.
+ */
+ __u64 spu_rcvhdraddr;
+
+ /*
+ * address of struct base_info to write to
+ */
+ __u64 spu_base_info;
+
+} __attribute__ ((aligned(8)));
+
+/* User commands. */
+
+#define IPATH_CMD_MIN 16
+
+#define IPATH_CMD_USER_INIT 16 /* set up userspace */
+#define IPATH_CMD_PORT_INFO 17 /* find out what resources we got */
+#define IPATH_CMD_RECV_CTRL 18 /* control receipt of packets */
+#define IPATH_CMD_TID_UPDATE 19 /* update expected TID entries */
+#define IPATH_CMD_TID_FREE 20 /* free expected TID entries */
+#define IPATH_CMD_SET_PART_KEY 21 /* add partition key */
+
+#define IPATH_CMD_MAX 21
+
+struct ipath_port_info {
+ __u32 num_active; /* number of active units */
+ __u32 unit; /* unit (chip) assigned to caller */
+ __u32 port; /* port on unit assigned to caller */
+};
+
+struct ipath_tid_info {
+ __u32 tidcnt;
+ __u32 tid__unused; /* make structure same size in 32 and 64 bit */
+ __u64 tidvaddr; /* virtual address of first page in transfer */
+ /* pointer (same size 32/64 bit) to __u16 tid array */
+ __u64 tidlist;
+
+ /*
+ * pointer (same size 32/64 bit) to bitmap of TIDs used
+ * for this call; checked for being large enough at open
+ */
+ __u64 tidmap;
+};
+
+struct ipath_cmd {
+ __u32 type; /* command type */
+ union {
+ struct ipath_tid_info tid_info;
+ struct ipath_user_info user_info;
+ /* address in userspace of struct ipath_port_info to
+ write result to */
+ __u64 port_info;
+ /* enable/disable receipt of packets */
+ __u32 recv_ctrl;
+ /* partition key to set */
+ __u16 part_key;
+ } cmd;
+};
+
+struct ipath_iovec {
+ /* Pointer to data, but same size 32 and 64 bit */
+ __u64 iov_base;
+
+ /*
+ * Length of data; don't need 64 bits, but want
+ * ipath_sendpkt to remain same size as before 32 bit changes, so...
+ */
+ __u64 iov_len;
+};
+
+/*
+ * Describes a single packet for send. Each packet can have one or more
+ * buffers, but the total length (exclusive of IB headers) must be less
+ * than the MTU, and if using the PIO method, entire packet length,
+ * including IB headers, must be less than the ipath_piosize value (words).
+ * Use of this necessitates including sys/uio.h
+ */
+struct __ipath_sendpkt {
+ __u32 sps_flags; /* flags for packet (TBD) */
+ __u32 sps_cnt; /* number of entries to use in sps_iov */
+ /* array of iov's describing packet. TEMPORARY */
+ struct ipath_iovec sps_iov[4];
+};
+
+/* Passed into SMA special file's ->read and ->write methods. */
+struct ipath_sma_pkt
+{
+ __u32 unit; /* unit on which to send packet */
+ __u64 data; /* address of payload in userspace */
+ __u32 len; /* length of payload */
+};
+
+/*
+ * Data layout in I2C flash (for GUID, etc.)
+ * All fields are little-endian binary unless otherwise stated
+ */
+#define IPATH_FLASH_VERSION 1
+struct ipath_flash {
+ __u8 if_fversion; /* flash layout version (IPATH_FLASH_VERSION) */
+ __u8 if_csum; /* checksum protecting if_length bytes */
+ /*
+ * valid length (in use, protected by if_csum), including if_fversion
+ * and if_sum themselves)
+ */
+ __u8 if_length;
+ __u8 if_guid[8]; /* the GUID, in network order */
+ /* number of GUIDs to use, starting from if_guid */
+ __u8 if_numguid;
+ char if_serial[12]; /* the board serial number, in ASCII */
+ char if_mfgdate[8]; /* board mfg date (YYYYMMDD ASCII) */
+ /* last board rework/test date (YYYYMMDD ASCII) */
+ char if_testdate[8];
+ __u8 if_errcntp[4]; /* logging of error counts, TBD */
+ /* powered on hours, updated at driver unload */
+ __u8 if_powerhour[2];
+ char if_comment[32]; /* ASCII free-form comment field */
+ __u8 if_future[50]; /* 78 bytes used, min flash size is 128 bytes */
+};
+
+/*
+ * These are the counters implemented in the chip, and are listed in order.
+ * The InterCaps naming is taken straight from the chip spec.
+ */
+struct infinipath_counters {
+ __u64 LBIntCnt;
+ __u64 LBFlowStallCnt;
+ __u64 Reserved1;
+ __u64 TxUnsupVLErrCnt;
+ __u64 TxDataPktCnt;
+ __u64 TxFlowPktCnt;
+ __u64 TxDwordCnt;
+ __u64 TxLenErrCnt;
+ __u64 TxMaxMinLenErrCnt;
+ __u64 TxUnderrunCnt;
+ __u64 TxFlowStallCnt;
+ __u64 TxDroppedPktCnt;
+ __u64 RxDroppedPktCnt;
+ __u64 RxDataPktCnt;
+ __u64 RxFlowPktCnt;
+ __u64 RxDwordCnt;
+ __u64 RxLenErrCnt;
+ __u64 RxMaxMinLenErrCnt;
+ __u64 RxICRCErrCnt;
+ __u64 RxVCRCErrCnt;
+ __u64 RxFlowCtrlErrCnt;
+ __u64 RxBadFormatCnt;
+ __u64 RxLinkProblemCnt;
+ __u64 RxEBPCnt;
+ __u64 RxLPCRCErrCnt;
+ __u64 RxBufOvflCnt;
+ __u64 RxTIDFullErrCnt;
+ __u64 RxTIDValidErrCnt;
+ __u64 RxPKeyMismatchCnt;
+ __u64 RxP0HdrEgrOvflCnt;
+ __u64 RxP1HdrEgrOvflCnt;
+ __u64 RxP2HdrEgrOvflCnt;
+ __u64 RxP3HdrEgrOvflCnt;
+ __u64 RxP4HdrEgrOvflCnt;
+ __u64 RxP5HdrEgrOvflCnt;
+ __u64 RxP6HdrEgrOvflCnt;
+ __u64 RxP7HdrEgrOvflCnt;
+ __u64 RxP8HdrEgrOvflCnt;
+ __u64 Reserved6;
+ __u64 Reserved7;
+ __u64 IBStatusChangeCnt;
+ __u64 IBLinkErrRecoveryCnt;
+ __u64 IBLinkDownedCnt;
+ __u64 IBSymbolErrCnt;
+};
+
+/*
+ * The next set of defines are for packet headers, and chip register
+ * and memory bits that are visible to and/or used by user-mode software
+ * The other bits that are used only by the driver or diags are in
+ * ipath_registers.h
+ */
+
+/* RcvHdrFlags bits */
+#define INFINIPATH_RHF_LENGTH_MASK 0x7FF
+#define INFINIPATH_RHF_LENGTH_SHIFT 0
+#define INFINIPATH_RHF_RCVTYPE_MASK 0x7
+#define INFINIPATH_RHF_RCVTYPE_SHIFT 11
+#define INFINIPATH_RHF_EGRINDEX_MASK 0x7FF
+#define INFINIPATH_RHF_EGRINDEX_SHIFT 16
+#define INFINIPATH_RHF_H_ICRCERR 0x80000000
+#define INFINIPATH_RHF_H_VCRCERR 0x40000000
+#define INFINIPATH_RHF_H_PARITYERR 0x20000000
+#define INFINIPATH_RHF_H_LENERR 0x10000000
+#define INFINIPATH_RHF_H_MTUERR 0x08000000
+#define INFINIPATH_RHF_H_IHDRERR 0x04000000
+#define INFINIPATH_RHF_H_TIDERR 0x02000000
+#define INFINIPATH_RHF_H_MKERR 0x01000000
+#define INFINIPATH_RHF_H_IBERR 0x00800000
+#define INFINIPATH_RHF_L_SWA 0x00008000
+#define INFINIPATH_RHF_L_SWB 0x00004000
+
+/* infinipath header fields */
+#define INFINIPATH_I_VERS_MASK 0xF
+#define INFINIPATH_I_VERS_SHIFT 28
+#define INFINIPATH_I_PORT_MASK 0xF
+#define INFINIPATH_I_PORT_SHIFT 24
+#define INFINIPATH_I_TID_MASK 0x7FF
+#define INFINIPATH_I_TID_SHIFT 13
+#define INFINIPATH_I_OFFSET_MASK 0x1FFF
+#define INFINIPATH_I_OFFSET_SHIFT 0
+
+/* K_PktFlags bits */
+#define INFINIPATH_KPF_INTR 0x1
+
+/* SendPIO per-buffer control */
+#define INFINIPATH_SP_LENGTHP1_MASK 0x3FF
+#define INFINIPATH_SP_LENGTHP1_SHIFT 0
+#define INFINIPATH_SP_INTR 0x80000000
+#define INFINIPATH_SP_TEST 0x40000000
+#define INFINIPATH_SP_TESTEBP 0x20000000
+
+/* SendPIOAvail bits */
+#define INFINIPATH_SENDPIOAVAIL_BUSY_SHIFT 1
+#define INFINIPATH_SENDPIOAVAIL_CHECK_SHIFT 0
+
+#endif /* _IPATH_COMMON_H */
diff -r d4136de1a941 -r 2a9e52d59741 drivers/infiniband/hw/ipath/ipath_debug.h
--- /dev/null Thu Jan 1 00:00:00 1970 +0000
+++ b/drivers/infiniband/hw/ipath/ipath_debug.h Thu Mar 9 16:15:10 2006 -0800
@@ -0,0 +1,96 @@
+/*
+ * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef _IPATH_DEBUG_H
+#define _IPATH_DEBUG_H
+
+#ifndef _IPATH_DEBUGGING /* debugging enabled or not */
+#define _IPATH_DEBUGGING 1
+#endif
+
+#if _IPATH_DEBUGGING
+
+/*
+ * Mask values for debugging. The scheme allows us to compile out any
+ * of the debug tracing stuff, and if compiled in, to enable or disable
+ * dynamically. This can be set at modprobe time also:
+ * modprobe infinipath.ko infinipath_debug=7
+ */
+
+#define __IPATH_INFO 0x1 /* generic low verbosity stuff */
+#define __IPATH_DBG 0x2 /* generic debug */
+#define __IPATH_TRSAMPLE 0x8 /* generate trace buffer sample entries */
+/* leave some low verbosity spots open */
+#define __IPATH_VERBDBG 0x40 /* very verbose debug */
+#define __IPATH_PKTDBG 0x80 /* print packet data */
+/* print process startup (init)/exit messages */
+#define __IPATH_PROCDBG 0x100
+/* print mmap/nopage stuff, not using VDBG any more */
+#define __IPATH_MMDBG 0x200
+#define __IPATH_USER_SEND 0x1000 /* use user mode send */
+#define __IPATH_KERNEL_SEND 0x2000 /* use kernel mode send */
+#define __IPATH_EPKTDBG 0x4000 /* print ethernet packet data */
+#define __IPATH_SMADBG 0x8000 /* sma packet debug */
+#define __IPATH_IPATHDBG 0x10000 /* Ethernet (IPATH) general debug on */
+#define __IPATH_IPATHWARN 0x20000 /* Ethernet (IPATH) warnings on */
+#define __IPATH_IPATHERR 0x40000 /* Ethernet (IPATH) errors on */
+#define __IPATH_IPATHPD 0x80000 /* Ethernet (IPATH) packet dump on */
+#define __IPATH_IPATHTABLE 0x100000 /* Ethernet (IPATH) table dump on */
+
+#else /* _IPATH_DEBUGGING */
+
+/*
+ * define all of these even with debugging off, for the few places that do
+ * if(infinipath_debug & _IPATH_xyzzy), but in a way that will make the
+ * compiler eliminate the code
+ */
+
+#define __IPATH_INFO 0x0 /* generic low verbosity stuff */
+#define __IPATH_DBG 0x0 /* generic debug */
+#define __IPATH_TRSAMPLE 0x0 /* generate trace buffer sample entries */
+#define __IPATH_VERBDBG 0x0 /* very verbose debug */
+#define __IPATH_PKTDBG 0x0 /* print packet data */
+#define __IPATH_PROCDBG 0x0 /* print process startup (init)/exit messages */
+/* print mmap/nopage stuff, not using VDBG any more */
+#define __IPATH_MMDBG 0x0
+#define __IPATH_EPKTDBG 0x0 /* print ethernet packet data */
+#define __IPATH_SMADBG 0x0 /* print process startup (init)/exit messages */#define __IPATH_IPATHDBG 0x0 /* Ethernet (IPATH) table dump on */
+#define __IPATH_IPATHWARN 0x0 /* Ethernet (IPATH) warnings on */
+#define __IPATH_IPATHERR 0x0 /* Ethernet (IPATH) errors on */
+#define __IPATH_IPATHPD 0x0 /* Ethernet (IPATH) packet dump on */
+#define __IPATH_IPATHTABLE 0x0 /* Ethernet (IPATH) packet dump on */
+
+#endif /* _IPATH_DEBUGGING */
+
+#define __IPATH_VERBOSEDBG __IPATH_VERBDBG
+
+#endif /* _IPATH_DEBUG_H */
diff -r d4136de1a941 -r 2a9e52d59741 drivers/infiniband/hw/ipath/ipath_kernel.h
--- /dev/null Thu Jan 1 00:00:00 1970 +0000
+++ b/drivers/infiniband/hw/ipath/ipath_kernel.h Thu Mar 9 16:15:10 2006 -0800
@@ -0,0 +1,774 @@
+#ifndef _IPATH_KERNEL_H
+#define _IPATH_KERNEL_H
+/*
+ * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+/*
+ * This header file is the base header file for infinipath kernel code
+ * ipath_user.h serves a similar purpose for user code.
+ */
+
+#include "ipath_common.h"
+#include "ipath_debug.h"
+#include "ipath_registers.h"
+#include <linux/interrupt.h>
+#include <asm/io.h>
+
+/* only s/w major version of InfiniPath we can handle */
+#define IPATH_CHIP_VERS_MAJ 2U
+
+#define IPATH_CHIP_VERS_MIN 0U /* don't care about this except printing */
+
+extern struct infinipath_stats ipath_stats; /* temporary, maybe always */
+
+#define IPATH_CHIP_SWVERSION IPATH_CHIP_VERS_MAJ
+
+struct ipath_portdata {
+ void **port_rcvegrbuf;
+ dma_addr_t *port_rcvegrbuf_phys;
+ void *port_rcvhdrq; /* rcvhdrq base, needs mmap before useful */
+ /* kernel virtual address where hdrqtail is updated */
+ u64 *port_rcvhdrtail_kvaddr;
+ struct page *port_rcvhdrtail_pagep; /* page * used for uaddr */
+ /*
+ * temp buffer for expected send setup, allocated at open, instead
+ * of each setup call
+ */
+ void *port_tid_pg_list;
+ wait_queue_head_t port_wait; /* when waiting for rcv or pioavail */
+ /*
+ * rcvegr bufs base, physical, must fit
+ * in 44 bits so 32 bit programs mmap64 44 bit works)
+ */
+ dma_addr_t port_rcvegr_phys;
+ dma_addr_t port_rcvhdrq_phys; /* mmap of hdrq, must fit in 44 bits */
+ /*
+ * the actual user address that we ipath_mlock'ed, so we can
+ * ipath_munlock it at close
+ */
+ unsigned long port_rcvhdrtail_uaddr;
+ /*
+ * number of opens on this instance (0 or 1; ignoring forks, dup,
+ * etc. for now)
+ */
+ int port_cnt;
+ /*
+ * how much space to leave at start of eager TID entries for protocol
+ * use, on each TID
+ */
+ unsigned port_port; /* instead of calculating it */
+ u32 port_piobufs; /* chip offset of PIO buffers for this port */
+ /* how many alloc_pages() chunks in port_rcvegrbuf_pages */
+ u32 port_rcvegrbuf_chunks;
+ u32 port_rcvegrbufs_perchunk; /* how many egrbufs per chunk */
+ size_t port_rcvegrbuf_size; /* order for port_rcvegrbuf_pages */
+ size_t port_rcvhdrq_size; /* rcvhdrq size (for freeing) */
+ /* next expected TID to check when looking for free */
+ u32 port_tidcursor;
+ unsigned long port_flag; /* next expected TID to check */
+ u32 port_rcvwait_to; /* WAIT_RCV that timed out, no interrupt */
+ u32 port_piowait_to; /* WAIT_PIO that timed out, no interrupt */
+ u32 port_rcvnowait; /* WAIT_RCV already happened, no wait */
+ u32 port_pionowait; /* WAIT_PIO already happened, no wait */
+ u32 port_hdrqfull; /* total number of rcvhdrqfull errors */
+ pid_t port_pid; /* pid of process using this port */
+ char port_comm[16]; /* same size as task_struct .comm[] */
+ u16 port_pkeys[4]; /* pkeys set by this use of this port */
+ struct ipath_devdata *port_dd; /* so file ops can get at unit */
+};
+
+struct sk_buff;
+
+/*
+ * control information for layered drivers
+ */
+struct _ipath_layer {
+ int (*l_intr)(int, u32);
+ int (*l_rcv)(int, void *, struct sk_buff *);
+ int (*l_rcv_lid)(int, void *);
+ u16 l_rcv_opcode;
+ u16 l_rcv_lid_opcode;
+};
+
+/* Verbs layer interface */
+struct _verbs_layer {
+ int (*l_piobufavail)(int);
+ void (*l_rcv)(int, void *, void *, u32);
+ void (*l_timer_cb)(int);
+ struct timer_list l_timer;
+ unsigned l_flags;
+};
+
+typedef u64 __bitwise ipath_err_t;
+
+struct ipath_devdata {
+ struct ipath_kregs const *ipath_kregs;
+ struct ipath_cregs const *ipath_cregs;
+
+ /* mem-mapped pointer to base of chip regs */
+ u64 __iomem *ipath_kregbase;
+ /* end of mem-mapped chip space; range checking */
+ u64 __iomem *ipath_kregend;
+ /* physical address of chip for io_remap, etc. */
+ unsigned long ipath_physaddr;
+ /* base of memory alloced for ipath_kregbase, for free */
+ u64 *ipath_kregalloc;
+ /*
+ * version of kregbase that doesn't have high bits set (for 32 bit
+ * programs, so mmap64 44 bit works)
+ */
+ u64 __iomem *ipath_kregvirt;
+ /*
+ * virtual address where port0 rcvhdrqtail updated for this unit.
+ * only written to by the chip, not the driver.
+ */
+ volatile __le64 *ipath_hdrqtailptr;
+ dma_addr_t ipath_dma_addr;
+ struct ipath_portdata **ipath_pd; /* ipath_cfgports pointers */
+ /* sk_buffs used by port 0 eager receive queue */
+ struct sk_buff **ipath_port0_skbs;
+ void __iomem *ipath_pio2kbase; /* kvirt address of 1st 2k pio buffer */
+ void __iomem *ipath_pio4kbase; /* kvirt address of 1st 4k pio buffer */
+ /*
+ * points to area where PIOavail registers will be DMA'ed. Has to
+ * be on a page of it's own, because the page will be mapped into user
+ * program space. This copy is *ONLY* ever written by DMA, not by
+ * the driver! Need a copy per device when we get to multiple devices
+ */
+ volatile __le64 *ipath_pioavailregs_dma;
+ size_t ipath_pioavailregs_size;
+ /* original address for free */
+ void *__ipath_pioavailregs_base;
+ /* physical address where updates occur */
+ dma_addr_t ipath_pioavailregs_phys;
+ struct _ipath_layer ipath_layer;
+ int (*ipath_f_intrsetup) (struct ipath_devdata *); /* setup intr */
+ /* setup on-chip bus config */
+ int (*ipath_f_bus) (struct ipath_devdata *, struct pci_dev *);
+ int (*ipath_f_reset) (struct ipath_devdata *); /* hard reset chip */
+ int (*ipath_f_get_boardname) (struct ipath_devdata *, char *, size_t);
+ void (*ipath_f_init_hwerrors) (struct ipath_devdata *);
+ void (*ipath_f_handle_hwerrors) (struct ipath_devdata *, char *, size_t);
+ void (*ipath_f_quiet_serdes) (struct ipath_devdata *);
+ int (*ipath_f_bringup_serdes) (struct ipath_devdata *);
+ int (*ipath_f_early_init) (struct ipath_devdata *);
+ void (*ipath_f_clear_tids) (struct ipath_devdata *, unsigned);
+ void (*ipath_f_put_tid) (struct ipath_devdata *, u64 __iomem*,
+ u32, unsigned long);
+ void (*ipath_f_tidtemplate) (struct ipath_devdata *);
+ void (*ipath_f_cleanup) (struct ipath_devdata *);
+ void (*ipath_f_setextled) (struct ipath_devdata *, u64, u64);
+ /* fill out chip-specific fields */
+ int (*ipath_f_get_base_info)(struct ipath_portdata *, void *);
+ struct _verbs_layer verbs_layer;
+ u64 ipath_sword; /* total dwords sent (summed from counter) */
+ u64 ipath_rword; /* total dwords rcvd (summed from counter) */
+ u64 ipath_spkts; /* total packets sent (summed from counter) */
+ u64 ipath_rpkts; /* total packets rcvd (summed from counter) */
+ u64 _ipath_status; /* ipath_statusp initially points to this. */
+ u64 ipath_guid; /* GUID for this interface, in network order */
+ /*
+ * aggregrate of error bits reported since
+ * last cleared, for limiting of error reporting
+ */
+ ipath_err_t ipath_lasterror;
+ /*
+ * aggregrate of error bits reported
+ * since last cleared, for limiting of hwerror reporting
+ */
+ ipath_err_t ipath_lasthwerror;
+ /*
+ * errors masked because they occur too fast,
+ * also includes errors that are always ignored (ipath_ignorederrs)
+ */
+ ipath_err_t ipath_maskederrs;
+ cycles_t ipath_unmasktime; /* time at which to re-enable maskederrs */
+ /*
+ * errors always ignored (masked), at least
+ * for a given chip/device, because they are wrong or not useful
+ */
+ ipath_err_t ipath_ignorederrs;
+ /* count of egrfull errors, combined for all ports */
+ u64 ipath_last_tidfull;
+ u64 ipath_lastport0rcv_cnt; /* for ipath_qcheck() */
+ u64 ipath_tidtemplate; /* template for writing TIDs */
+ u64 ipath_tidinvalid; /* value to write to free TIDs */
+ u64 ipath_rhdrhead_intr_off; /* PE-800 rcv interrupt setup */
+
+ u32 ipath_kregsize; /* size of memory at ipath_kregbase */
+ u32 ipath_pioavregs; /* number of registers used for pioavail */
+ u32 ipath_flags; /* IPATH_POLL, etc. */
+ u32 ipath_sma_state_wanted; /* ipath_flags sma is waiting for */
+ /* last buffer for user use, first buf for kernel use is this index. */
+ u32 ipath_lastport_piobuf;
+ u32 ipath_stats_timer_active; /* is a stats timer active */
+ u32 ipath_lastsword; /* dwords sent read from counter */
+ u32 ipath_lastrword; /* dwords received read from counter */
+ u32 ipath_lastspkts; /* sent packets read from counter */
+ u32 ipath_lastrpkts; /* received packets read from counter */
+ u32 ipath_pbufsport; /* pio bufs allocated per port */
+ /*
+ * number of ports configured as max; zero is
+ * set to number chip supports, less gives more pio bufs/port, etc.
+ */
+ u32 ipath_cfgports;
+ u32 ipath_port0head; /* port0 rcvhdrq head offset */
+ u32 ipath_p0_hdrqfull; /* count of port 0 hdrqfull errors */
+
+ /*
+ * (*cfgports) used to suppress multiple instances of same port
+ * staying stuck at same point
+ */
+ u32 *ipath_lastrcvhdrqtails;
+ /*
+ * (*cfgports) used to suppress multiple instances of same port
+ * staying stuck at same point
+ */
+ u32 *ipath_lastegrheads;
+ /*
+ * index of last piobuffer we used. Speeds up searching, by starting
+ * at this point. Doesn't matter if multiple cpu's use and update,
+ * last updater is only write that matters. Whenever it wraps,
+ * we update shadow copies. Need a copy per device when we get to
+ * multiple devices
+ */
+ u32 ipath_lastpioindex;
+ u32 ipath_freezelen; /* max length of freezemsg */
+ u32 ipath_consec_nopiobuf; /* consecutive times we wanted a PIO buffer
+ * but were unable to get one */
+ u32 ipath_upd_pio_shadow; /* hint that we should update
+ * ipath_pioavailshadow before looking for a PIO buffer */
+ u32 ipath_pcibar0; /* so we can rewrite it after a chip reset */
+ u32 ipath_pcibar1; /* so we can rewrite it after a chip reset */
+ u32 ipath_nosma_bufs; /* sequential tries for SMA send and no bufs */
+ u32 ipath_nosma_secs; /* duration (seconds) ipath_nosma_bufs set */
+
+ u16 ipath_vendorid; /* HT/PCI Vendor ID (here for NodeInfo) */
+ u16 ipath_deviceid; /* HT/PCI Device ID (here for NodeInfo) */
+ /* offset in HT config space of slave/primary interface block */
+ u8 ipath_ht_slave_off;
+ unsigned long ipath_wc_cookie; /* for write combining settings */
+ atomic_t ipath_pkeyrefs[4]; /* ref count for each pkey */
+ /* shadow copy of all exptids physaddr; used only by funcsim */
+ u64 *ipath_tidsimshadow;
+ /* shadow copy of struct page *'s for exp tid pages */
+ struct page **ipath_pageshadow;
+ spinlock_t ipath_tid_lock; /* lock to workaround chip bug 9437 */
+
+ /*
+ * IPATH_STATUS_*,
+ * this address is mapped readonly into user processes so they can
+ * get status cheaply, whenever they want.
+ */
+ u64 *ipath_statusp;
+ char *ipath_freezemsg; /* freeze msg if hw error put chip in freeze */
+ struct pci_dev *pcidev; /* pci access data structure */
+ struct cdev *cdev;
+ struct class_device *class_dev;
+ /* timer used to prevent stats overflow, error throttling, etc. */
+ struct timer_list ipath_stats_timer;
+ /* check for stale messages in rcv queue */
+ unsigned long ipath_rcv_pending; /* only allow one intr at a time. */
+
+ /*
+ * shadow copies of registers; size indicates read access size
+ * Most of them are readonly, but some are write-only register, where
+ * we manipulate the bits in the shadow copy, and then write the shadow
+ * copy to infinipath
+ * We deliberately make most of these 32 bits, since they have
+ * restricted range and for any that we read, we won't to generate
+ * 32 bit accesses, since Opteron will generate 2 separate 32 bit
+ * HT transactions for a 64 bit read, and we want to avoid unnecessary
+ * HT transactions
+ */
+
+ /* This is the 64 bit group */
+ /* shadow of pioavail, check to be sure it's large enough at init time. */
+ unsigned long ipath_pioavailshadow[8];
+ u64 ipath_gpio_out; /* shadow of kr_gpio_out, for rmw ops */
+ u64 ipath_revision; /* kr_revision shadow */
+ /* shadow of ibcctrl, for interrupt handling of link changes, etc. */
+ u64 ipath_ibcctrl;
+ /*
+ * last ibcstatus, to suppress "duplicate" status change messages,
+ * mostly from 2 to 3
+ */
+ u64 ipath_lastibcstat;
+ ipath_err_t ipath_hwerrmask; /* hwerrmask shadow */
+ u64 ipath_intconfig; /* interrupt config reg shadow */
+ u64 ipath_piobufbase; /* kr_sendpiobufbase value */
+
+ /* these are the "32 bit" regs */
+ /*
+ * number of GUIDs in the flash for this interface; may need some
+ * rethinking for setting on other ifaces
+ */
+ u32 ipath_nguid;
+ /*
+ * the following two are 32-bit bitmasks, but
+ * {test,clear,set}_bit all expect bit fields to be "unsigned
+ * long"
+ */
+ unsigned long ipath_rcvctrl; /* shadow kr_rcvctrl */
+ unsigned long ipath_sendctrl; /* shadow kr_sendctrl */
+
+ u32 ipath_rcvhdrcnt; /* value we put in kr_rcvhdrcnt */
+ u32 ipath_rcvhdrsize; /* value we put in kr_rcvhdrsize */
+ u32 ipath_rcvhdrentsize; /* value we put in kr_rcvhdrentsize */
+ u32 ipath_hdrqlast; /* offset of last entry in rcvhdrq */
+ u32 ipath_portcnt; /* kr_portcnt value */
+ u32 ipath_palign; /* kr_pagealign value */
+ u32 ipath_piobcnt2k; /* number of "2KB" PIO buffers */
+ u32 ipath_piosize2k; /* size in bytes of "2KB" PIO buffers */
+ u32 ipath_piobcnt4k; /* number of "4KB" PIO buffers */
+ u32 ipath_piosize4k; /* size in bytes of "4KB" PIO buffers */
+ u32 ipath_rcvegrbase; /* kr_rcvegrbase value */
+ u32 ipath_rcvegrcnt; /* kr_rcvegrcnt value */
+ u32 ipath_rcvtidbase; /* kr_rcvtidbase value */
+ u32 ipath_rcvtidcnt; /* kr_rcvtidcnt value */
+ u32 ipath_sregbase; /* kr_sendregbase */
+ u32 ipath_uregbase; /* kr_userregbase */
+ u32 ipath_cregbase; /* kr_counterregbase */
+ u32 ipath_control; /* shadow the control register contents */
+ u32 ipath_extctrl; /* shadow the gpio output contents */
+ u32 ipath_pcirev; /* PCI revision register (HTC rev on FPGA) */
+
+ u32 ipath_4kalign; /* chip address space used by 4k pio buffers */
+ u32 ipath_ibmtu; /* The MTU programmed for this unit */
+ /*
+ * The max size IB packet, included IB headers that we can send.
+ * Starts same as ipath_piosize, but is affected when ibmtu is
+ * changed, or by size of eager buffers
+ */
+ u32 ipath_ibmaxlen;
+ /*
+ * ibmaxlen at init time, limited by chip and by receive buffer size.
+ * Not changed after init.
+ */
+ u32 ipath_init_ibmaxlen;
+ u32 ipath_rcvegrbufsize; /* size of each rcvegrbuffer */
+ u32 ipath_htwidth; /* width (2,4,8,16,32) from HT config reg */
+ u32 ipath_htspeed; /* HT speed (200,400,800,1000) from HT config */
+ unsigned long ipath_portpiowait; /* ports waiting for PIOavail intr */
+ /*
+ *number of sequential ibcstatus change for polling active/quiet
+ * (i.e., link not coming up).
+ */
+ u32 ipath_ibpollcnt;
+ u32 ipath_msi_lo; /* low and high portions of MSI capability/vector */
+ u32 ipath_msi_hi; /* saved after PCIe init for restore after reset */
+ u16 ipath_msi_data; /* MSI data (vector) saved for restore */
+ u16 ipath_mlid; /* MLID programmed for this instance */
+ u16 ipath_lid; /* LID programmed for this instance */
+ u16 ipath_pkeys[4]; /* list of pkeys programmed; 0 if not set */
+ u8 ipath_serial[12]; /* ASCII serial number, from flash */
+ u8 ipath_boardversion[80]; /* human readable board version */
+ u8 ipath_majrev; /* chip major rev, from ipath_revision */
+ u8 ipath_minrev; /* chip minor rev, from ipath_revision */
+ u8 ipath_boardrev; /* board rev, from ipath_revision */
+ int ipath_unit; /* unit # of this chip, if present */
+ u8 ipath_pci_cacheline; /* saved for restore after reset */
+ u8 ipath_lmc; /* LID mask control */
+};
+
+extern u64 *ipath_port0_rcvhdrtail;
+extern dma_addr_t ipath_port0_rcvhdrtail_dma;
+
+#define IPATH_PORT0_RCVHDRTAIL_SIZE PAGE_SIZE
+
+extern atomic_t ipath_max;
+extern struct ipath_devdata *ipath_lookup(int unit);
+
+struct page *ipath_nopage(struct vm_area_struct *, unsigned long, int *);
+int ipath_init_chip(struct ipath_devdata *, int);
+int ipath_enable_wc(struct ipath_devdata *dd);
+void ipath_disable_wc(struct ipath_devdata *dd);
+int ipath_count_units(int *npresentp, int *nupp, u32 *maxportsp);
+
+struct file_operations;
+int ipath_cdev_init(int minor, char *name, struct file_operations *fops,
+ struct cdev **cdevp, struct class_device **class_devp);
+void ipath_cdev_cleanup(struct cdev **cdevp, struct class_device **class_devp);
+
+int ipath_diag_init(void);
+void ipath_diag_cleanup(void);
+void ipath_diag_bringup_link(struct ipath_devdata *);
+
+int ipath_sma_init(void);
+void ipath_sma_cleanup(void);
+
+int ipath_user_add(struct ipath_devdata *dd);
+void ipath_user_del(struct ipath_devdata *dd);
+
+struct sk_buff *ipath_alloc_skb(struct ipath_devdata *dd, gfp_t);
+
+extern __kernel_pid_t ipath_diag_alive; /* contains pid if diags mode enabled? */
+
+irqreturn_t ipath_intr(int irq, void *devid, struct pt_regs *regs);
+void ipath_decode_err(char *buf, size_t blen, ipath_err_t err);
+#if __IPATH_INFO || __IPATH_DBG
+extern const char *ipath_ibcstatus_str[];
+#endif
+
+/* clean up any per-chip chip-specific stuff */
+void ipath_chip_cleanup(struct ipath_devdata *);
+void ipath_chip_done(void); /* clean up any chip type-specific stuff */
+
+/* check to see if we have to force ordering for write combining */
+int ipath_unordered_wc(void);
+
+void ipath_disarm_piobufs(struct ipath_devdata *, unsigned first,
+ unsigned cnt);
+
+#define IPATH_SMA_HDRSZ (8+12+8) /* LRH+BTH+DETH */
+#define IPATH_SMA_MAX_PKTSZ (IPATH_SMA_HDRSZ+256)
+#define IPATH_NUM_SMA_PKTS 16
+
+int ipath_create_rcvhdrq(struct ipath_devdata *, struct ipath_portdata *);
+void ipath_free_pddata(struct ipath_devdata *, u32, int);
+
+int ipath_parse_ushort(const char *str, unsigned short *valp);
+
+extern unsigned ipath_sma_first;
+extern unsigned ipath_sma_next;
+extern atomic_t ipath_sma_alive;
+extern spinlock_t ipath_sma_lock;
+extern u8 ipath_sma_data_bufs[IPATH_NUM_SMA_PKTS + 1][IPATH_SMA_MAX_PKTSZ];
+extern u8 *ipath_sma_data_spare;
+extern wait_queue_head_t ipath_sma_wait;
+extern wait_queue_head_t ipath_sma_state_wait;
+
+extern struct _ipath_sma_rpkt {
+ /* length of received packet; non-zero if queued */
+ u32 len;
+ /* unit number of interface packet was received from */
+ u32 unit;
+ u8 *buf;
+} ipath_sma_data[IPATH_NUM_SMA_PKTS];
+
+int ipath_wait_linkstate(struct ipath_devdata *, u32, int);
+void ipath_set_ib_lstate(struct ipath_devdata *, int);
+void ipath_kreceive(struct ipath_devdata *);
+int ipath_setrcvhdrsize(struct ipath_devdata *, unsigned);
+int ipath_reset_device(int);
+void ipath_get_faststats(unsigned long);
+
+/* for use in system calls, where we want to know device type, etc. */
+#define port_fp(fp) ((struct ipath_portdata *) (fp)->private_data)
+
+/*
+ * values for ipath_flags
+ */
+#define IPATH_INITTED 0x2 /* The chip is up and initted */
+#define IPATH_RCVHDRSZ_SET 0x4 /* set if any user code has set kr_rcvhdrsize */
+/* The chip is present and valid for accesses */
+#define IPATH_PRESENT 0x8
+/* HT link0 is only 8 bits wide, ignore upper byte crc errors, etc. */
+#define IPATH_8BIT_IN_HT0 0x10
+/* HT link1 is only 8 bits wide, ignore upper byte crc errors, etc. */
+#define IPATH_8BIT_IN_HT1 0x20
+#define IPATH_LINKDOWN 0x40 /* The link is down */
+#define IPATH_LINKINIT 0x80 /* The link level is up (0x11) */
+#define IPATH_LINKARMED 0x100 /* The link is in the armed (0x21) state */
+#define IPATH_LINKACTIVE 0x200 /* The link is in the active (0x31) state */
+#define IPATH_LINKUNK 0x400 /* link current state is unknown */
+#define IPATH_NOCABLE 0x4000 /* no IB cable, or no device on IB cable */
+/* Supports port zero per packet receive interrupts via GPIO */
+#define IPATH_GPIO_INTR 0x8000 /* GPIO port0 rx interrupts avail */
+#define IPATH_4BYTE_TID 0x10000 /* uses the coded 4byte TID, not 8 byte */
+#define IPATH_32BITCOUNTERS 0x20000 /* packet/word counters are 32 bit, else
+ * those 4 counters are 64bit */
+#define IPATH_POLL_RX_INTR 0x40000 /* can miss port0 rx interrupts */
+
+/* portdata flag bit offsets */
+#define IPATH_PORT_WAITING_RCV 2 /* waiting for a packet to arrive */
+/* waiting for a PIO buffer to be available */
+#define IPATH_PORT_WAITING_PIO 3
+
+/* free up any allocated data at closes */
+void ipath_free_data(struct ipath_portdata *dd);
+int ipath_waitfor_mdio_cmdready(struct ipath_devdata *);
+int ipath_waitfor_complete(struct ipath_devdata *, ipath_kreg, u64, u64 *);
+u32 __iomem *ipath_getpiobuf(struct ipath_devdata *, u32 *);
+void ipath_init_pe800_funcs(struct ipath_devdata *); /* init PE-800-specific func */
+void ipath_init_ht400_funcs(struct ipath_devdata *); /* init HT-400-specific func */
+void ipath_get_guid(struct ipath_devdata *);
+u64 ipath_snap_cntr(struct ipath_devdata *, ipath_creg);
+
+/*
+ * number of words used for protocol header if not set by ipath_userinit();
+ */
+#define IPATH_DFLT_RCVHDRSIZE 9
+
+#define IPATH_MDIO_CMD_WRITE 1
+#define IPATH_MDIO_CMD_READ 2
+#define IPATH_MDIO_CLD_DIV 25 /* to get 2.5 Mhz mdio clock */
+#define IPATH_MDIO_CMDVALID 0x40000000 /* bit 30 */
+#define IPATH_MDIO_DATAVALID 0x80000000 /* bit 31 */
+#define IPATH_MDIO_CTRL_STD 0x0
+
+static inline u64 ipath_mdio_req(int cmd, int dev, int reg, int data)
+{
+ return (((u64) IPATH_MDIO_CLD_DIV) << 32) |
+ (cmd << 26) |
+ (dev << 21) |
+ (reg << 16) |
+ (data & 0xFFFF);
+}
+
+#define IPATH_MDIO_CTRL_XGXS_REG_8 0x8 /* signal and fifo status, in bank 31 */
+
+#define IPATH_MDIO_CTRL_8355_REG_1 0x10 /* controls loopback, redundancy */
+#define IPATH_MDIO_CTRL_8355_REG_2 0x11 /* premph, encdec, etc. */
+#define IPATH_MDIO_CTRL_8355_REG_6 0x15 /* Kchars, etc. */
+#define IPATH_MDIO_CTRL_8355_REG_9 0x18
+#define IPATH_MDIO_CTRL_8355_REG_10 0x1D
+
+int ipath_get_user_pages(unsigned long, size_t, struct page **);
+int ipath_get_user_pages_nocopy(unsigned long, struct page **);
+void ipath_release_user_pages(struct page **, size_t);
+void ipath_release_user_pages_on_close(struct page **, size_t);
+int ipath_eeprom_read(struct ipath_devdata *, u8, void *, int);
+int ipath_eeprom_write(struct ipath_devdata *, u8, const void *, int);
+
+/* these are used for the registers that vary with port */
+void ipath_write_kreg_port(const struct ipath_devdata *, ipath_kreg,
+ unsigned, u64);
+u64 ipath_read_kreg64_port(const struct ipath_devdata *, ipath_kreg, unsigned);
+
+/*
+ * we could have a single register get/put routine, that takes a group
+ * type, but this is somewhat clearer and cleaner. It also gives us some
+ * error checking. 64 bit register reads should always work, but are
+ * inefficient on opteron (the northbridge always generates 2 separate
+ * HT 32 bit reads), so we use kreg32 wherever possible.
+ * User register and counter register reads are always 32 bit reads, so only
+ * one form of those routines.
+ */
+
+/*
+ * At the moment, none of the s-registers are writable, so no ipath_write_sreg()
+ * At the moment, none of the c-registers are writable, so no ipath_write_creg()
+ */
+
+/*
+ * return the contents of a register that is virtualized to be per port
+ * prints a debug message and returns -1 on errors (not distinguishable from
+ * valid contents at runtime; we may add a separate error variable at some
+ * point).
+ * This is normally not used by the kernel, but may be for debugging,
+ * and has a different implementation than user mode, which is why
+ * it's not in _common.h
+ */
+static inline u32 ipath_read_ureg32(const struct ipath_devdata *dd,
+ ipath_ureg regno, int port)
+{
+ if (!dd->ipath_kregbase)
+ return 0;
+
+ return readl(regno + (u64 __iomem *)
+ (dd->ipath_uregbase +
+ (char __iomem *)dd->ipath_kregbase +
+ dd->ipath_palign * port));
+}
+
+/*
+ * change the contents of a register that is virtualized to be per port
+ * prints a debug message and returns 1 on errors, 0 on success.
+ */
+static inline void ipath_write_ureg(const struct ipath_devdata *dd,
+ ipath_ureg regno, u64 value, int port)
+{
+ u64 __iomem *ubase;
+
+ ubase = (u64 __iomem *)
+ (dd->ipath_uregbase +
+ (char __iomem *)dd->ipath_kregbase +
+ dd->ipath_palign * port);
+ if (dd->ipath_kregbase)
+ writeq(value, &ubase[regno]);
+}
+
+static inline u32 ipath_read_kreg32(const struct ipath_devdata *dd,
+ ipath_kreg regno)
+{
+ if (!dd->ipath_kregbase)
+ return -1;
+ return readl((u32 __iomem *) & dd->ipath_kregbase[regno]);
+}
+
+static inline u64 ipath_read_kreg64(const struct ipath_devdata *dd,
+ ipath_kreg regno)
+{
+ if (!dd->ipath_kregbase)
+ return -1;
+
+ return readq(&dd->ipath_kregbase[regno]);
+}
+
+static inline void ipath_write_kreg(const struct ipath_devdata *dd,
+ ipath_kreg regno, u64 value)
+{
+ if (dd->ipath_kregbase)
+ writeq(value, &dd->ipath_kregbase[regno]);
+}
+
+static inline u64 ipath_read_creg(const struct ipath_devdata *dd, ipath_sreg regno)
+{
+ if (!dd->ipath_kregbase)
+ return 0;
+
+ return readq(regno + (u64 __iomem *)
+ (dd->ipath_cregbase +
+ (char __iomem *)dd->ipath_kregbase));
+}
+
+static inline uint32_t ipath_read_creg32(const struct ipath_devdata *dd,
+ ipath_sreg regno)
+{
+ if (!dd->ipath_kregbase)
+ return 0;
+ return readl(regno + (u64 __iomem *)
+ (dd->ipath_cregbase +
+ (char __iomem *)dd->ipath_kregbase));
+}
+
+/*
+ * caddr is the destination chip address (full pointer, not offset),
+ * val is the qword to write there. We only handle a single qword (8 bytes).
+ * This is not used for copies to the PIO buffer, just TID updates, etc.
+ * This function localizes all chip mem (as opposed to register) qword writes.
+ */
+static inline void ipath_write_memq(const struct ipath_devdata *dd,
+ u64 __iomem * caddr, u64 val)
+{
+ if (dd->ipath_kregbase)
+ writeq(val, caddr);
+}
+
+/*
+ * caddr is the destination chip address (full pointer, not offset),
+ * val is the dword to write there. We only handle a single dword (4 bytes).
+ * This is not used for copies to the PIO buffer, just TID updates, etc.
+ * This function localizes all chip mem (as opposed to register) dword writes.
+ */
+static inline void ipath_write_meml(const struct ipath_devdata *dd,
+ u32 __iomem * caddr, u32 val)
+{
+ if (dd->ipath_kregbase)
+ writel(val, caddr);
+}
+
+static inline u64 ipath_read_memq(const struct ipath_devdata *dd,
+ u64 __iomem * caddr)
+{
+ if (dd->ipath_kregbase)
+ return readq(caddr);
+ return ~0ULL;
+}
+
+static inline u32 ipath_read_meml(const struct ipath_devdata *dd,
+ u32 __iomem * caddr)
+{
+ if (dd->ipath_kregbase)
+ return readl(caddr);
+ return ~0U;
+}
+
+/*
+ * sysfs interface.
+ */
+
+struct device_driver;
+
+extern const char ipath_core_version[];
+
+int ipath_driver_create_group(struct device_driver *);
+void ipath_driver_remove_group(struct device_driver *);
+
+int ipath_device_create_group(struct device *, struct ipath_devdata *);
+void ipath_device_remove_group(struct device *, struct ipath_devdata *);
+int ipath_expose_reset(struct device *);
+
+/*
+ * Flush write combining store buffers (if present) and perform a write
+ * barrier.
+ */
+#if defined(CONFIG_X86_64)
+#define ipath_flush_wc() asm volatile("sfence" ::: "memory")
+#else
+#define ipath_flush_wc() wmb()
+#endif
+
+extern unsigned ipath_debug; /* debugging bit mask */
+
+const char *ipath_get_unit_name(int unit);
+
+extern struct mutex ipath_mutex;
+
+#define IPATH_DRV_NAME "ipath_core"
+#define IPATH_MAJOR 233
+#define IPATH_SMA_MINOR 128
+#define IPATH_DIAG_MINOR 129
+#define IPATH_NMINORS 130
+
+#define ipath_dev_err(dd,fmt,...) \
+ do { \
+ const struct ipath_devdata *__dd = (dd); \
+ if (__dd->pcidev) \
+ dev_err(&__dd->pcidev->dev, "%s: " fmt, \
+ ipath_get_unit_name(__dd->ipath_unit), ##__VA_ARGS__); \
+ else \
+ printk(KERN_ERR IPATH_DRV_NAME ": %s: " fmt, \
+ ipath_get_unit_name(__dd->ipath_unit), ##__VA_ARGS__); \
+ } while (0)
+
+#if _IPATH_DEBUGGING
+
+#define __IPATH_DBG_WHICH(which,fmt,...) \
+ do { \
+ if(unlikely(ipath_debug&(which))) \
+ printk(KERN_DEBUG IPATH_DRV_NAME ": %s: " fmt, \
+ __func__,##__VA_ARGS__); \
+ } while(0)
+
+#define ipath_dbg(fmt,...) __IPATH_DBG_WHICH(__IPATH_DBG,fmt,##__VA_ARGS__)
+#define ipath_cdbg(which,fmt,...) __IPATH_DBG_WHICH(__IPATH_##which##DBG,fmt,##__VA_ARGS__)
+
+#else /* ! _IPATH_DEBUGGING */
+
+#define ipath_dbg(fmt,...)
+#define ipath_cdbg(which,fmt,...)
+
+#endif /* _IPATH_DEBUGGING */
+
+#endif /* _IPATH_KERNEL_H */
diff -r d4136de1a941 -r 2a9e52d59741 drivers/infiniband/hw/ipath/ipath_registers.h
--- /dev/null Thu Jan 1 00:00:00 1970 +0000
+++ b/drivers/infiniband/hw/ipath/ipath_registers.h Thu Mar 9 16:15:10 2006 -0800
@@ -0,0 +1,443 @@
+/*
+ * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef _IPATH_REGISTERS_H
+#define _IPATH_REGISTERS_H
+
+/*
+ * This file should only be included by kernel source, and by the diags.
+ * It defines the registers, and their contents, for the InfiniPath HT-400 chip
+ */
+
+/*
+ * These are the InfiniPath register and buffer bit definitions,
+ * that are visible to software, and needed only by the kernel
+ * and diag code. A few, that are visible to protocol and user
+ * code are in ipath_common.h. Some bits are specific
+ * to a given chip implementation, and have been moved to the
+ * chip-specific source file
+ */
+
+/* kr_revision bits */
+#define INFINIPATH_R_CHIPREVMINOR_MASK 0xFF
+#define INFINIPATH_R_CHIPREVMINOR_SHIFT 0
+#define INFINIPATH_R_CHIPREVMAJOR_MASK 0xFF
+#define INFINIPATH_R_CHIPREVMAJOR_SHIFT 8
+#define INFINIPATH_R_ARCH_MASK 0xFF
+#define INFINIPATH_R_ARCH_SHIFT 16
+#define INFINIPATH_R_SOFTWARE_MASK 0xFF
+#define INFINIPATH_R_SOFTWARE_SHIFT 24
+#define INFINIPATH_R_BOARDID_MASK 0xFF
+#define INFINIPATH_R_BOARDID_SHIFT 32
+
+/* kr_control bits */
+#define INFINIPATH_C_FREEZEMODE 0x00000002
+#define INFINIPATH_C_LINKENABLE 0x00000004
+#define INFINIPATH_C_RESET 0x00000001
+
+/* kr_sendctrl bits */
+#define INFINIPATH_S_DISARMPIOBUF_SHIFT 16
+
+#define IPATH_S_ABORT 0
+#define IPATH_S_PIOINTBUFAVAIL 1
+#define IPATH_S_PIOBUFAVAILUPD 2
+#define IPATH_S_PIOENABLE 3
+#define IPATH_S_DISARM 31
+
+#define INFINIPATH_S_ABORT (1U << IPATH_S_ABORT)
+#define INFINIPATH_S_PIOINTBUFAVAIL (1U << IPATH_S_PIOINTBUFAVAIL)
+#define INFINIPATH_S_PIOBUFAVAILUPD (1U << IPATH_S_PIOBUFAVAILUPD)
+#define INFINIPATH_S_PIOENABLE (1U << IPATH_S_PIOENABLE)
+#define INFINIPATH_S_DISARM (1U << IPATH_S_DISARM)
+
+/* kr_rcvctrl bits */
+#define INFINIPATH_R_PORTENABLE_SHIFT 0
+#define INFINIPATH_R_INTRAVAIL_SHIFT 16
+#define INFINIPATH_R_TAILUPD 0x80000000
+
+/* kr_intstatus, kr_intclear, kr_intmask bits */
+#define INFINIPATH_I_RCVURG_SHIFT 0
+#define INFINIPATH_I_RCVAVAIL_SHIFT 12
+#define INFINIPATH_I_ERROR 0x80000000
+#define INFINIPATH_I_SPIOSENT 0x40000000
+#define INFINIPATH_I_SPIOBUFAVAIL 0x20000000
+#define INFINIPATH_I_GPIO 0x10000000
+
+/* kr_errorstatus, kr_errorclear, kr_errormask bits */
+#define INFINIPATH_E_RFORMATERR 0x0000000000000001ULL
+#define INFINIPATH_E_RVCRC 0x0000000000000002ULL
+#define INFINIPATH_E_RICRC 0x0000000000000004ULL
+#define INFINIPATH_E_RMINPKTLEN 0x0000000000000008ULL
+#define INFINIPATH_E_RMAXPKTLEN 0x0000000000000010ULL
+#define INFINIPATH_E_RLONGPKTLEN 0x0000000000000020ULL
+#define INFINIPATH_E_RSHORTPKTLEN 0x0000000000000040ULL
+#define INFINIPATH_E_RUNEXPCHAR 0x0000000000000080ULL
+#define INFINIPATH_E_RUNSUPVL 0x0000000000000100ULL
+#define INFINIPATH_E_REBP 0x0000000000000200ULL
+#define INFINIPATH_E_RIBFLOW 0x0000000000000400ULL
+#define INFINIPATH_E_RBADVERSION 0x0000000000000800ULL
+#define INFINIPATH_E_RRCVEGRFULL 0x0000000000001000ULL
+#define INFINIPATH_E_RRCVHDRFULL 0x0000000000002000ULL
+#define INFINIPATH_E_RBADTID 0x0000000000004000ULL
+#define INFINIPATH_E_RHDRLEN 0x0000000000008000ULL
+#define INFINIPATH_E_RHDR 0x0000000000010000ULL
+#define INFINIPATH_E_RIBLOSTLINK 0x0000000000020000ULL
+#define INFINIPATH_E_SMINPKTLEN 0x0000000020000000ULL
+#define INFINIPATH_E_SMAXPKTLEN 0x0000000040000000ULL
+#define INFINIPATH_E_SUNDERRUN 0x0000000080000000ULL
+#define INFINIPATH_E_SPKTLEN 0x0000000100000000ULL
+#define INFINIPATH_E_SDROPPEDSMPPKT 0x0000000200000000ULL
+#define INFINIPATH_E_SDROPPEDDATAPKT 0x0000000400000000ULL
+#define INFINIPATH_E_SPIOARMLAUNCH 0x0000000800000000ULL
+#define INFINIPATH_E_SUNEXPERRPKTNUM 0x0000001000000000ULL
+#define INFINIPATH_E_SUNSUPVL 0x0000002000000000ULL
+#define INFINIPATH_E_IBSTATUSCHANGED 0x0001000000000000ULL
+#define INFINIPATH_E_INVALIDADDR 0x0002000000000000ULL
+#define INFINIPATH_E_RESET 0x0004000000000000ULL
+#define INFINIPATH_E_HARDWARE 0x0008000000000000ULL
+
+/* kr_hwerrclear, kr_hwerrmask, kr_hwerrstatus, bits */
+/* TXEMEMPARITYERR bit 0: PIObuf, 1: PIOpbc, 2: launchfifo
+ * RXEMEMPARITYERR bit 0: rcvbuf, 1: lookupq, 2: eagerTID, 3: expTID
+ * bit 4: flag buffer, 5: datainfo, 6: header info */
+#define INFINIPATH_HWE_TXEMEMPARITYERR_MASK 0xFULL
+#define INFINIPATH_HWE_TXEMEMPARITYERR_SHIFT 40
+#define INFINIPATH_HWE_RXEMEMPARITYERR_MASK 0x7FULL
+#define INFINIPATH_HWE_RXEMEMPARITYERR_SHIFT 44
+#define INFINIPATH_HWE_RXDSYNCMEMPARITYERR 0x0000000400000000ULL
+#define INFINIPATH_HWE_IBCBUSTOSPCPARITYERR 0x4000000000000000ULL
+#define INFINIPATH_HWE_IBCBUSFRSPCPARITYERR 0x8000000000000000ULL
+
+/* kr_hwdiagctrl bits */
+#define INFINIPATH_DC_FORCETXEMEMPARITYERR_MASK 0xFULL
+#define INFINIPATH_DC_FORCETXEMEMPARITYERR_SHIFT 40
+#define INFINIPATH_DC_FORCERXEMEMPARITYERR_MASK 0x7FULL
+#define INFINIPATH_DC_FORCERXEMEMPARITYERR_SHIFT 44
+#define INFINIPATH_DC_FORCERXDSYNCMEMPARITYERR 0x0000000400000000ULL
+#define INFINIPATH_DC_COUNTERDISABLE 0x1000000000000000ULL
+#define INFINIPATH_DC_COUNTERWREN 0x2000000000000000ULL
+#define INFINIPATH_DC_FORCEIBCBUSTOSPCPARITYERR 0x4000000000000000ULL
+#define INFINIPATH_DC_FORCEIBCBUSFRSPCPARITYERR 0x8000000000000000ULL
+
+/* kr_ibcctrl bits */
+#define INFINIPATH_IBCC_FLOWCTRLPERIOD_MASK 0xFFULL
+#define INFINIPATH_IBCC_FLOWCTRLPERIOD_SHIFT 0
+#define INFINIPATH_IBCC_FLOWCTRLWATERMARK_MASK 0xFFULL
+#define INFINIPATH_IBCC_FLOWCTRLWATERMARK_SHIFT 8
+#define INFINIPATH_IBCC_LINKINITCMD_MASK 0x3ULL
+#define INFINIPATH_IBCC_LINKINITCMD_DISABLE 1
+#define INFINIPATH_IBCC_LINKINITCMD_POLL 2 /* cycle through TS1/TS2 till OK */
+#define INFINIPATH_IBCC_LINKINITCMD_SLEEP 3 /* wait for TS1, then go on */
+#define INFINIPATH_IBCC_LINKINITCMD_SHIFT 16
+#define INFINIPATH_IBCC_LINKCMD_MASK 0x3ULL
+#define INFINIPATH_IBCC_LINKCMD_INIT 1 /* move to 0x11 */
+#define INFINIPATH_IBCC_LINKCMD_ARMED 2 /* move to 0x21 */
+#define INFINIPATH_IBCC_LINKCMD_ACTIVE 3 /* move to 0x31 */
+#define INFINIPATH_IBCC_LINKCMD_SHIFT 18
+#define INFINIPATH_IBCC_MAXPKTLEN_MASK 0x7FFULL
+#define INFINIPATH_IBCC_MAXPKTLEN_SHIFT 20
+#define INFINIPATH_IBCC_PHYERRTHRESHOLD_MASK 0xFULL
+#define INFINIPATH_IBCC_PHYERRTHRESHOLD_SHIFT 32
+#define INFINIPATH_IBCC_OVERRUNTHRESHOLD_MASK 0xFULL
+#define INFINIPATH_IBCC_OVERRUNTHRESHOLD_SHIFT 36
+#define INFINIPATH_IBCC_CREDITSCALE_MASK 0x7ULL
+#define INFINIPATH_IBCC_CREDITSCALE_SHIFT 40
+#define INFINIPATH_IBCC_LOOPBACK 0x8000000000000000ULL
+#define INFINIPATH_IBCC_LINKDOWNDEFAULTSTATE 0x4000000000000000ULL
+
+/* kr_ibcstatus bits */
+#define INFINIPATH_IBCS_LINKTRAININGSTATE_MASK 0xF
+#define INFINIPATH_IBCS_LINKTRAININGSTATE_SHIFT 0
+#define INFINIPATH_IBCS_LINKSTATE_MASK 0x7
+#define INFINIPATH_IBCS_LINKSTATE_SHIFT 4
+#define INFINIPATH_IBCS_TXREADY 0x40000000
+#define INFINIPATH_IBCS_TXCREDITOK 0x80000000
+/* link training states (shift by INFINIPATH_IBCS_LINKTRAININGSTATE_SHIFT) */
+#define INFINIPATH_IBCS_LT_STATE_DISABLED 0x00
+#define INFINIPATH_IBCS_LT_STATE_LINKUP 0x01
+#define INFINIPATH_IBCS_LT_STATE_POLLACTIVE 0x02
+#define INFINIPATH_IBCS_LT_STATE_POLLQUIET 0x03
+#define INFINIPATH_IBCS_LT_STATE_SLEEPDELAY 0x04
+#define INFINIPATH_IBCS_LT_STATE_SLEEPQUIET 0x05
+#define INFINIPATH_IBCS_LT_STATE_CFGDEBOUNCE 0x08
+#define INFINIPATH_IBCS_LT_STATE_CFGRCVFCFG 0x09
+#define INFINIPATH_IBCS_LT_STATE_CFGWAITRMT 0x0a
+#define INFINIPATH_IBCS_LT_STATE_CFGIDLE 0x0b
+#define INFINIPATH_IBCS_LT_STATE_RECOVERRETRAIN 0x0c
+#define INFINIPATH_IBCS_LT_STATE_RECOVERWAITRMT 0x0e
+#define INFINIPATH_IBCS_LT_STATE_RECOVERIDLE 0x0f
+/* link state machine states (shift by INFINIPATH_IBCS_LINKSTATE_SHIFT) */
+#define INFINIPATH_IBCS_L_STATE_DOWN 0x0
+#define INFINIPATH_IBCS_L_STATE_INIT 0x1
+#define INFINIPATH_IBCS_L_STATE_ARM 0x2
+#define INFINIPATH_IBCS_L_STATE_ACTIVE 0x3
+#define INFINIPATH_IBCS_L_STATE_ACT_DEFER 0x4
+
+/* combination link status states that we use with some frequency */
+#define IPATH_IBSTATE_MASK ((INFINIPATH_IBCS_LINKTRAININGSTATE_MASK \
+ << INFINIPATH_IBCS_LINKSTATE_SHIFT) | \
+ (INFINIPATH_IBCS_LINKSTATE_MASK \
+ <<INFINIPATH_IBCS_LINKTRAININGSTATE_SHIFT))
+#define IPATH_IBSTATE_INIT ((INFINIPATH_IBCS_L_STATE_INIT \
+ << INFINIPATH_IBCS_LINKSTATE_SHIFT) | \
+ (INFINIPATH_IBCS_LT_STATE_LINKUP \
+ <<INFINIPATH_IBCS_LINKTRAININGSTATE_SHIFT))
+#define IPATH_IBSTATE_ARM ((INFINIPATH_IBCS_L_STATE_ARM \
+ << INFINIPATH_IBCS_LINKSTATE_SHIFT) | \
+ (INFINIPATH_IBCS_LT_STATE_LINKUP \
+ <<INFINIPATH_IBCS_LINKTRAININGSTATE_SHIFT))
+#define IPATH_IBSTATE_ACTIVE ((INFINIPATH_IBCS_L_STATE_ACTIVE \
+ << INFINIPATH_IBCS_LINKSTATE_SHIFT) | \
+ (INFINIPATH_IBCS_LT_STATE_LINKUP \
+ <<INFINIPATH_IBCS_LINKTRAININGSTATE_SHIFT))
+
+/* kr_extstatus bits */
+#define INFINIPATH_EXTS_SERDESPLLLOCK 0x1
+#define INFINIPATH_EXTS_GPIOIN_MASK 0xFFFFULL
+#define INFINIPATH_EXTS_GPIOIN_SHIFT 48
+
+/* kr_extctrl bits */
+#define INFINIPATH_EXTC_GPIOINVERT_MASK 0xFFFFULL
+#define INFINIPATH_EXTC_GPIOINVERT_SHIFT 32
+#define INFINIPATH_EXTC_GPIOOE_MASK 0xFFFFULL
+#define INFINIPATH_EXTC_GPIOOE_SHIFT 48
+#define INFINIPATH_EXTC_SERDESENABLE 0x80000000ULL
+#define INFINIPATH_EXTC_SERDESCONNECT 0x40000000ULL
+#define INFINIPATH_EXTC_SERDESENTRUNKING 0x20000000ULL
+#define INFINIPATH_EXTC_SERDESDISRXFIFO 0x10000000ULL
+#define INFINIPATH_EXTC_SERDESENPLPBK1 0x08000000ULL
+#define INFINIPATH_EXTC_SERDESENPLPBK2 0x04000000ULL
+#define INFINIPATH_EXTC_SERDESENENCDEC 0x02000000ULL
+#define INFINIPATH_EXTC_LED1SECPORT_ON 0x00000020ULL
+#define INFINIPATH_EXTC_LED2SECPORT_ON 0x00000010ULL
+#define INFINIPATH_EXTC_LED1PRIPORT_ON 0x00000008ULL
+#define INFINIPATH_EXTC_LED2PRIPORT_ON 0x00000004ULL
+#define INFINIPATH_EXTC_LEDGBLOK_ON 0x00000002ULL
+#define INFINIPATH_EXTC_LEDGBLERR_OFF 0x00000001ULL
+
+/* kr_mdio bits */
+#define INFINIPATH_MDIO_CLKDIV_MASK 0x7FULL
+#define INFINIPATH_MDIO_CLKDIV_SHIFT 32
+#define INFINIPATH_MDIO_COMMAND_MASK 0x7ULL
+#define INFINIPATH_MDIO_COMMAND_SHIFT 26
+#define INFINIPATH_MDIO_DEVADDR_MASK 0x1FULL
+#define INFINIPATH_MDIO_DEVADDR_SHIFT 21
+#define INFINIPATH_MDIO_REGADDR_MASK 0x1FULL
+#define INFINIPATH_MDIO_REGADDR_SHIFT 16
+#define INFINIPATH_MDIO_DATA_MASK 0xFFFFULL
+#define INFINIPATH_MDIO_DATA_SHIFT 0
+#define INFINIPATH_MDIO_CMDVALID 0x0000000040000000ULL
+#define INFINIPATH_MDIO_RDDATAVALID 0x0000000080000000ULL
+
+/* kr_partitionkey bits */
+#define INFINIPATH_PKEY_SIZE 16
+#define INFINIPATH_PKEY_MASK 0xFFFF
+#define INFINIPATH_PKEY_DEFAULT_PKEY 0xFFFF
+
+/* kr_serdesconfig0 bits */
+#define INFINIPATH_SERDC0_RESET_MASK 0xfULL /* overal reset bits */
+#define INFINIPATH_SERDC0_RESET_PLL 0x10000000ULL /* pll reset */
+#define INFINIPATH_SERDC0_TXIDLE 0xF000ULL /* tx idle enables (per lane) */
+#define INFINIPATH_SERDC0_RXDETECT_EN 0xF0000ULL /* rx detect enables (per lane) */
+#define INFINIPATH_SERDC0_L1PWR_DN 0xF0ULL /* L1 Power down; use with RXDETECT,
+ Otherwise not used on IB side */
+
+/* kr_xgxsconfig bits */
+#define INFINIPATH_XGXS_RESET 0x7ULL
+#define INFINIPATH_XGXS_MDIOADDR_MASK 0xfULL
+#define INFINIPATH_XGXS_MDIOADDR_SHIFT 4
+
+#define INFINIPATH_RT_ADDR_MASK 0xFFFFFFFFFFULL /* 40 bits valid */
+
+/* TID entries (memory), HT400-only */
+#define INFINIPATH_RT_VALID 0x8000000000000000ULL
+#define INFINIPATH_RT_ADDR_SHIFT 0
+#define INFINIPATH_RT_BUFSIZE_MASK 0x3FFF
+#define INFINIPATH_RT_BUFSIZE_SHIFT 48
+
+/*
+ * IPATH_PIO_MAXIBHDR is the max IB header size allowed for in our
+ * PIO send buffers. This is well beyond anything currently
+ * defined in the InfiniBand spec.
+ */
+#define IPATH_PIO_MAXIBHDR 128
+
+/* mask of defined bits for various registers */
+extern u64
+ infinipath_i_bitsextant, infinipath_e_bitsextant, infinipath_hwe_bitsextant;
+
+/* masks that are different in various chips, or only exist in some chips */
+extern u32 infinipath_i_rcvavail_mask, infinipath_i_rcvurg_mask;
+
+/*
+ * register bits for selecting i2c direction and values, used for I2C serial
+ * flash
+ */
+extern u16 ipath_gpio_sda_num, ipath_gpio_scl_num;
+extern u64 ipath_gpio_sda, ipath_gpio_scl;
+
+/*
+ * These are the infinipath general register numbers (not offsets).
+ * The kernel registers are used directly, those beyond the kernel
+ * registers are calculated from one of the base registers. The use of
+ * an integer type doesn't allow type-checking as thorough as, say,
+ * an enum but allows for better hiding of chip differences.
+ */
+typedef const u16 ipath_kreg, /* infinipath general registers */
+ ipath_creg, /* infinipath counter registers */
+ ipath_sreg; /* kernel-only, infinipath send registers */
+
+/*
+ * These are the chip registers common to all infinipath chips, and
+ * used both by the kernel and the diagnostics or other user code.
+ * They are all implemented such that 64 bit accesses work.
+ * Some implement no more than 32 bits. Because 64 bit reads
+ * require 2 HT cmds on opteron, we access those with 32 bit
+ * reads for efficiency (they are written as 64 bits, since
+ * the extra 32 bits are nearly free on writes, and it slightly reduces
+ * complexity). The rest are all accessed as 64 bits.
+ */
+struct ipath_kregs {
+ /* These are the 32 bit group */
+ ipath_kreg kr_control;
+ ipath_kreg kr_counterregbase;
+ ipath_kreg kr_intmask;
+ ipath_kreg kr_intstatus;
+ ipath_kreg kr_pagealign;
+ ipath_kreg kr_portcnt;
+ ipath_kreg kr_rcvtidbase;
+ ipath_kreg kr_rcvtidcnt;
+ ipath_kreg kr_rcvegrbase;
+ ipath_kreg kr_rcvegrcnt;
+ ipath_kreg kr_scratch;
+ ipath_kreg kr_sendctrl;
+ ipath_kreg kr_sendpiobufbase;
+ ipath_kreg kr_sendpiobufcnt;
+ ipath_kreg kr_sendpiosize;
+ ipath_kreg kr_sendregbase;
+ ipath_kreg kr_userregbase;
+ /* These are the 64 bit group */
+ ipath_kreg kr_debugport;
+ ipath_kreg kr_debugportselect;
+ ipath_kreg kr_errorclear;
+ ipath_kreg kr_errormask;
+ ipath_kreg kr_errorstatus;
+ ipath_kreg kr_extctrl;
+ ipath_kreg kr_extstatus;
+ ipath_kreg kr_gpio_clear;
+ ipath_kreg kr_gpio_mask;
+ ipath_kreg kr_gpio_out;
+ ipath_kreg kr_gpio_status;
+ ipath_kreg kr_hwdiagctrl;
+ ipath_kreg kr_hwerrclear;
+ ipath_kreg kr_hwerrmask;
+ ipath_kreg kr_hwerrstatus;
+ ipath_kreg kr_ibcctrl;
+ ipath_kreg kr_ibcstatus;
+ ipath_kreg kr_intblocked;
+ ipath_kreg kr_intclear;
+ ipath_kreg kr_interruptconfig;
+ ipath_kreg kr_mdio;
+ ipath_kreg kr_partitionkey;
+ ipath_kreg kr_rcvbthqp;
+ ipath_kreg kr_rcvbufbase;
+ ipath_kreg kr_rcvbufsize;
+ ipath_kreg kr_rcvctrl;
+ ipath_kreg kr_rcvhdrcnt;
+ ipath_kreg kr_rcvhdrentsize;
+ ipath_kreg kr_rcvhdrsize;
+ ipath_kreg kr_rcvintmembase;
+ ipath_kreg kr_rcvintmemsize;
+ ipath_kreg kr_revision;
+ ipath_kreg kr_sendbuffererror;
+ ipath_kreg kr_sendpioavailaddr;
+ ipath_kreg kr_serdesconfig0;
+ ipath_kreg kr_serdesconfig1;
+ ipath_kreg kr_serdesstatus;
+ ipath_kreg kr_txintmembase;
+ ipath_kreg kr_txintmemsize;
+ ipath_kreg kr_xgxsconfig;
+ ipath_kreg kr_ibpllcfg;
+ /* use these two (and the following N ports) only with ipath_k*_kreg64_port();
+ * not *kreg64() */
+ ipath_kreg kr_rcvhdraddr;
+ ipath_kreg kr_rcvhdrtailaddr;
+
+ /* remaining registers are not present on all types of infinipath chips */
+ ipath_kreg kr_rcvpktledcnt;
+ ipath_kreg kr_pcierbuftestreg0;
+ ipath_kreg kr_pcierbuftestreg1;
+ ipath_kreg kr_pcieq0serdesconfig0;
+ ipath_kreg kr_pcieq0serdesconfig1;
+ ipath_kreg kr_pcieq0serdesstatus;
+ ipath_kreg kr_pcieq1serdesconfig0;
+ ipath_kreg kr_pcieq1serdesconfig1;
+ ipath_kreg kr_pcieq1serdesstatus;
+};
+
+struct ipath_cregs {
+ ipath_creg cr_badformatcnt;
+ ipath_creg cr_erricrccnt;
+ ipath_creg cr_errlinkcnt;
+ ipath_creg cr_errlpcrccnt;
+ ipath_creg cr_errpkey;
+ ipath_creg cr_errrcvflowctrlcnt;
+ ipath_creg cr_err_rlencnt;
+ ipath_creg cr_errslencnt;
+ ipath_creg cr_errtidfull;
+ ipath_creg cr_errtidvalid;
+ ipath_creg cr_errvcrccnt;
+ ipath_creg cr_ibstatuschange;
+ ipath_creg cr_intcnt;
+ ipath_creg cr_invalidrlencnt;
+ ipath_creg cr_invalidslencnt;
+ ipath_creg cr_lbflowstallcnt;
+ ipath_creg cr_iblinkdowncnt;
+ ipath_creg cr_iblinkerrrecovcnt;
+ ipath_creg cr_ibsymbolerrcnt;
+ ipath_creg cr_pktrcvcnt;
+ ipath_creg cr_pktrcvflowctrlcnt;
+ ipath_creg cr_pktsendcnt;
+ ipath_creg cr_pktsendflowcnt;
+ ipath_creg cr_portovflcnt;
+ ipath_creg cr_rcvebpcnt;
+ ipath_creg cr_rcvovflcnt;
+ ipath_creg cr_rxdroppktcnt;
+ ipath_creg cr_senddropped;
+ ipath_creg cr_sendstallcnt;
+ ipath_creg cr_sendunderruncnt;
+ ipath_creg cr_unsupvlcnt;
+ ipath_creg cr_wordrcvcnt;
+ ipath_creg cr_wordsendcnt;
+};
+
+#endif /* _IPATH_REGISTERS_H */
diff -r d4136de1a941 -r 2a9e52d59741 drivers/infiniband/hw/ipath/ips_common.h
--- /dev/null Thu Jan 1 00:00:00 1970 +0000
+++ b/drivers/infiniband/hw/ipath/ips_common.h Thu Mar 9 16:15:10 2006 -0800
@@ -0,0 +1,256 @@
+#ifndef IPS_COMMON_H
+#define IPS_COMMON_H
+/*
+ * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "ipath_common.h"
+
+struct ipath_header {
+ /*
+ * Version - 4 bits, Port - 4 bits, TID - 10 bits and Offset - 14 bits
+ * before ECO change ~28 Dec 03.
+ * After that, Vers 4, Port 3, TID 11, offset 14.
+ */
+ __u32 ver_port_tid_offset;
+ __u16 chksum;
+ __u16 pkt_flags;
+};
+
+struct ips_message_header {
+ __be16 lrh[4];
+ __be32 bth[3];
+ /* fields below this point are in host byte order */
+ struct ipath_header iph;
+ __u8 sub_opcode;
+ __u8 flags;
+ __u16 src_rank;
+ /* 24 bits. The upper 8 bit is available for other use */
+ union {
+ struct {
+ unsigned ack_seq_num:24;
+ unsigned port:4;
+ unsigned unused:4;
+ };
+ __u32 ack_seq_num_org;
+ };
+ __u8 expected_tid_session_id;
+ __u8 tinylen; /* to aid MPI */
+ __u16 tag; /* to aid MPI */
+ union {
+ __u32 mpi[4]; /* to aid MPI */
+ __u32 data[4];
+ struct {
+ __u16 mtu;
+ __u8 major_ver;
+ __u8 minor_ver;
+ __u32 not_used; //free
+ __u32 run_id;
+ __u32 client_ver;
+ };
+ };
+};
+
+struct ether_header {
+ __be16 lrh[4];
+ __be32 bth[3];
+ /* fields below this point are in host byte order */
+ struct ipath_header iph;
+ __u8 sub_opcode;
+ __u8 cmd;
+ __u16 lid;
+ __u16 mac[3];
+ __u8 frag_num;
+ __u8 seq_num;
+ __u32 len;
+ /* MUST be of word size do to PIO write requirements */
+ __u32 csum;
+ __u16 csum_offset;
+ __u16 flags;
+ __u16 first_2_bytes;
+ __u8 unused[2]; /* currently unused */
+};
+
+/*
+ * The PIO buffer used for sending infinipath messages must only be written
+ * in 32-bit words, all the data must be written, and no writes can occur
+ * after the last word is written (which transfers "ownership" of the buffer
+ * to the chip and triggers the message to be sent).
+ * Since the Linux sk_buff structure can be recursive, non-aligned, and
+ * any number of bytes in each segment, we use the following structure
+ * to keep information about the overall state of the copy operation.
+ * This is used to save the information needed to store the checksum
+ * in the right place before sending the last word to the hardware and
+ * to buffer the last 0-3 bytes of non-word sized segments.
+ */
+struct copy_data_s {
+ struct ether_header *hdr;
+ __u32 __iomem *csum_pio; /* addr of PIO buf to write csum to */
+ __u32 __iomem *to; /* addr of PIO buf to write data to */
+ __u32 device; /* which device to allocate PIO bufs from */
+ __s32 error; /* set if there is an error. */
+ __s32 extra; /* amount of data saved in u.buf below */
+ __u32 len; /* total length to send in bytes */
+ __u32 flen; /* frament length in words */
+ __u32 csum; /* partial IP checksum */
+ __u32 pos; /* position for partial checksum */
+ __u32 offset; /* offset to where data currently starts */
+ __s32 checksum_calc; /* set to 1 when csum has been calculated */
+ struct sk_buff *skb;
+ union {
+ __u32 w;
+ __u8 buf[4];
+ } u;
+};
+
+/* IB - LRH header consts */
+#define IPS_LRH_GRH 0x0003 /* 1. word of IB LRH - next header: GRH */
+#define IPS_LRH_BTH 0x0002 /* 1. word of IB LRH - next header: BTH */
+
+#define IPS_OFFSET 0
+
+/*
+ * defines the cut-off point between the header queue and eager/expected
+ * TID queue
+ */
+#define NUM_OF_EXTRA_WORDS_IN_HEADER_QUEUE ((sizeof(struct ips_message_header) - offsetof(struct ips_message_header, iph)) >> 2)
+
+/* OpCodes */
+#define OPCODE_IPS 0xC0
+#define OPCODE_ITH4X 0xC1
+
+/* OpCode 30 is use by stand-alone test programs */
+#define OPCODE_RAW_DATA 0xDE
+/* last OpCode (31) is reserved for test */
+#define OPCODE_TEST 0xDF
+
+/* sub OpCodes - ips */
+#define OPCODE_SEQ_DATA 0x01
+#define OPCODE_SEQ_CTRL 0x02
+
+#define OPCODE_SEQ_MQ_DATA 0x03
+#define OPCODE_SEQ_MQ_CTRL 0x04
+
+#define OPCODE_ACK 0x10
+#define OPCODE_NAK 0x11
+
+#define OPCODE_ERR_CHK 0x20
+#define OPCODE_ERR_CHK_PLS 0x21
+
+#define OPCODE_STARTUP 0x30
+#define OPCODE_STARTUP_ACK 0x31
+#define OPCODE_STARTUP_NAK 0x32
+
+#define OPCODE_STARTUP_EXT 0x34
+#define OPCODE_STARTUP_ACK_EXT 0x35
+#define OPCODE_STARTUP_NAK_EXT 0x36
+
+#define OPCODE_TIDS_RELEASE 0x40
+#define OPCODE_TIDS_RELEASE_CONFIRM 0x41
+
+#define OPCODE_CLOSE 0x50
+#define OPCODE_CLOSE_ACK 0x51
+/*
+ * like OPCODE_CLOSE, but no complaint if other side has already closed. Used
+ * when doing abort(), MPI_Abort(), etc.
+ */
+#define OPCODE_ABORT 0x52
+
+/* sub OpCodes - ith4x */
+#define OPCODE_ENCAP 0x81
+#define OPCODE_LID_ARP 0x82
+
+/* Receive Header Queue: receive type (from infinipath) */
+#define RCVHQ_RCV_TYPE_EXPECTED 0
+#define RCVHQ_RCV_TYPE_EAGER 1
+#define RCVHQ_RCV_TYPE_NON_KD 2
+#define RCVHQ_RCV_TYPE_ERROR 3
+
+/* misc. */
+#define SIZE_OF_CRC 1
+
+#define EAGER_TID_ID INFINIPATH_I_TID_MASK
+
+#define IPS_DEFAULT_P_KEY 0xFFFF
+
+#define IPS_PERMISSIVE_LID 0xFFFF
+#define IPS_MULTICAST_LID_BASE 0xC000
+
+#define IPS_AETH_CREDIT_SHIFT 24
+#define IPS_AETH_CREDIT_MASK 0x1F
+#define IPS_AETH_CREDIT_INVAL 0x1F
+
+#define IPS_PSN_MASK 0xFFFFFF
+#define IPS_MSN_MASK 0xFFFFFF
+#define IPS_QPN_MASK 0xFFFFFF
+#define IPS_MULTICAST_QPN 0xFFFFFF
+
+/* functions for extracting fields from rcvhdrq entries */
+static inline __u32 ips_get_hdr_err_flags(const __u32 * rbuf)
+{
+ return rbuf[1];
+}
+
+static inline __u32 ips_get_index(const __u32 * rbuf)
+{
+ return (rbuf[0] >> INFINIPATH_RHF_EGRINDEX_SHIFT)
+ & INFINIPATH_RHF_EGRINDEX_MASK;
+}
+
+static inline __u32 ips_get_rcv_type(const __u32 * rbuf)
+{
+ return (rbuf[0] >> INFINIPATH_RHF_RCVTYPE_SHIFT)
+ & INFINIPATH_RHF_RCVTYPE_MASK;
+}
+
+static inline __u32 ips_get_length_in_bytes(const __u32 * rbuf)
+{
+ return ((rbuf[0] >> INFINIPATH_RHF_LENGTH_SHIFT)
+ & INFINIPATH_RHF_LENGTH_MASK) << 2;
+}
+
+static inline void *ips_get_first_protocol_header(const uint32_t * rbuf)
+{
+ return (void *)&rbuf[2];
+}
+
+static inline struct ips_message_header *ips_get_ips_header(const __u32 * rbuf)
+{
+ return (struct ips_message_header *)&rbuf[2];
+}
+
+static inline __u32 ips_get_ipath_ver(__u32 hdrword)
+{
+ return (hdrword >> INFINIPATH_I_VERS_SHIFT)
+ & INFINIPATH_I_VERS_MASK;
+}
+
+#endif /* IPS_COMMON_H */
^ permalink raw reply [flat|nested] 70+ messages in thread* [PATCH 2 of 20] ipath - core device driver
2006-03-10 0:35 [PATCH 0 of 20] [RFC] ipath driver - another round for review Bryan O'Sullivan
2006-03-10 0:35 ` [PATCH 1 of 20] ipath - core driver header files Bryan O'Sullivan
@ 2006-03-10 0:35 ` Bryan O'Sullivan
2006-03-10 0:35 ` [PATCH 3 of 20] ipath - copy and send routines for sending an skb Bryan O'Sullivan
` (18 subsequent siblings)
20 siblings, 0 replies; 70+ messages in thread
From: Bryan O'Sullivan @ 2006-03-10 0:35 UTC (permalink / raw)
To: rolandd, gregkh, akpm, davem; +Cc: linux-kernel, openib-general
The driver requires kernel PCI_MSI support in order to enable
interrupts. Since the kernel's MSI infrastructure is currently highly
x86-specific, we have a temporary timer-based hack in place for
non-MSI kernels until other arches start supporting MSI.
Signed-off-by: Bryan O'Sullivan <bos@pathscale.com>
diff -r 2a9e52d59741 -r 19bdf20bc544 drivers/infiniband/hw/ipath/ipath_driver.c
--- /dev/null Thu Jan 1 00:00:00 1970 +0000
+++ b/drivers/infiniband/hw/ipath/ipath_driver.c Thu Mar 9 16:15:16 2006 -0800
@@ -0,0 +1,2194 @@
+/*
+ * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/spinlock.h>
+#include <linux/idr.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/swap.h>
+#include <linux/netdevice.h>
+#include <linux/vmalloc.h>
+
+/*
+ * InfiniPath only supports message-based interrupts. It has no interrupt
+ * pins. Therefore we require CONFIG_PCI_MSI be enabled. We want a
+ * very visible failure if the support isn't present.
+ */
+#ifndef CONFIG_PCI_MSI
+#error "Without CONFIG_PCI_MSI, interrupts will not work"
+#endif
+
+#include "ipath_kernel.h"
+#include "ips_common.h"
+#include "ipath_layer.h"
+
+static void ipath_update_pio_bufs(struct ipath_devdata *);
+static int ipath_shutdown_link(struct ipath_devdata *);
+struct page *ipath_nopage(struct vm_area_struct *, unsigned long, int *);
+
+const char *ipath_get_unit_name(int unit)
+{
+ static char iname[16];
+ snprintf(iname, sizeof iname, "infinipath%u", unit);
+ return iname;
+}
+
+#define DRIVER_LOAD_MSG "PathScale " IPATH_DRV_NAME " loaded: "
+#define PFX IPATH_DRV_NAME ": "
+
+/*
+ * The size has to be longer than this string, so we can append
+ * board/chip information to it in the init code.
+ */
+const char ipath_core_version[] = IPATH_IDSTR "\n";
+
+static struct idr unit_table;
+static DEFINE_SPINLOCK(unit_table_lock);
+atomic_t ipath_max;
+
+unsigned ipath_debug = __IPATH_INFO;
+
+module_param_named(debug, ipath_debug, uint, S_IWUSR | S_IRUGO);
+MODULE_PARM_DESC(debug, "mask for debug prints");
+EXPORT_SYMBOL_GPL(ipath_debug);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("PathScale <support@pathscale.com>");
+MODULE_DESCRIPTION("Pathscale InfiniPath driver");
+
+const char *ipath_ibcstatus_str[] = {
+ "Disabled",
+ "LinkUp",
+ "PollActive",
+ "PollQuiet",
+ "SleepDelay",
+ "SleepQuiet",
+ "LState6", /* unused */
+ "LState7", /* unused */
+ "CfgDebounce",
+ "CfgRcvfCfg",
+ "CfgWaitRmt",
+ "CfgIdle",
+ "RecovRetrain",
+ "LState0xD", /* unused */
+ "RecovWaitRmt",
+ "RecovIdle",
+};
+
+/*
+ * These variables are initialized in the chip-specific files
+ * but are defined here.
+ */
+u16 ipath_gpio_sda_num, ipath_gpio_scl_num;
+u64 ipath_gpio_sda, ipath_gpio_scl;
+u64 infinipath_i_bitsextant, infinipath_e_bitsextant,
+ infinipath_hwe_bitsextant;
+u32 infinipath_i_rcvavail_mask, infinipath_i_rcvurg_mask;
+
+static void __devexit ipath_remove_one(struct pci_dev *);
+static int ipath_init_one(struct pci_dev *, const struct pci_device_id *);
+
+/* Only needed for registration, nothing else needs this info */
+#define PCI_VENDOR_ID_PATHSCALE 0x1fc1
+#define PCI_DEVICE_ID_INFINIPATH_HT 0xd
+#define PCI_DEVICE_ID_INFINIPATH_PE800 0x10
+
+static const struct pci_device_id ipath_pci_tbl[] = {
+ {PCI_DEVICE(PCI_VENDOR_ID_PATHSCALE,
+ PCI_DEVICE_ID_INFINIPATH_HT)},
+ {PCI_DEVICE(PCI_VENDOR_ID_PATHSCALE,
+ PCI_DEVICE_ID_INFINIPATH_PE800)},
+};
+
+MODULE_DEVICE_TABLE(pci, ipath_pci_tbl);
+
+static struct pci_driver ipath_driver = {
+ .name = IPATH_DRV_NAME,
+ .probe = ipath_init_one,
+ .remove = __devexit_p(ipath_remove_one),
+ .id_table = ipath_pci_tbl,
+};
+
+/*
+ * This is where port 0's rcvhdrtail register is written back; we also
+ * want nothing else sharing the cache line, so make it a cache line
+ * in size. Used for all units.
+ */
+u64 *ipath_port0_rcvhdrtail;
+dma_addr_t ipath_port0_rcvhdrtail_dma;
+static int port0_rcvhdrtail_refs;
+
+#if defined (pgprot_writecombine) && defined(_PAGE_MA_WC)
+int remap_area_pages(unsigned long address, unsigned long phys_addr,
+ unsigned long size, unsigned long flags);
+#endif
+
+static inline void read_bars(struct pci_dev *dev, u32 *bar0, u32 *bar1)
+{
+ int ret;
+
+ ret = pci_read_config_dword(dev, PCI_BASE_ADDRESS_0, bar0);
+ if (ret)
+ dev_err(&dev->dev, "failed to read bar0 before enable: "
+ "error %d\n", -ret);
+
+ ret = pci_read_config_dword(dev, PCI_BASE_ADDRESS_1, bar1);
+ if (ret)
+ dev_err(&dev->dev, "failed to read bar1 before enable: "
+ "error %d\n", -ret);
+
+ ipath_dbg("Read bar0 %x bar1 %x\n", *bar0, *bar1);
+}
+
+static void ipath_free_devdata(struct pci_dev *pdev,
+ struct ipath_devdata *dd)
+{
+ unsigned long flags;
+
+ if (dd->ipath_unit != -1) {
+ spin_lock_irqsave(&unit_table_lock, flags);
+ idr_remove(&unit_table, dd->ipath_unit);
+ spin_unlock_irqrestore(&unit_table_lock, flags);
+ }
+ pci_free_consistent(pdev, sizeof(*dd), dd, dd->ipath_dma_addr);
+}
+
+static struct ipath_devdata *ipath_alloc_devdata(struct pci_dev *pdev)
+{
+ unsigned long flags;
+ struct ipath_devdata *dd;
+ dma_addr_t dma_addr;
+ int ret;
+
+ if (!idr_pre_get(&unit_table, GFP_KERNEL)) {
+ dd = ERR_PTR(-ENOMEM);
+ goto bail;
+ }
+
+ dd = pci_alloc_consistent(pdev, sizeof(*dd), &dma_addr);
+
+ if (!dd) {
+ dd = ERR_PTR(-ENOMEM);
+ goto bail;
+ }
+
+ dd->ipath_dma_addr = dma_addr;
+ dd->ipath_unit = -1;
+
+ spin_lock_irqsave(&unit_table_lock, flags);
+
+ ret = idr_get_new(&unit_table, dd, &dd->ipath_unit);
+ if (ret < 0) {
+ printk(KERN_ERR IPATH_DRV_NAME
+ ": Could not allocate unit ID: error %d\n", -ret);
+ ipath_free_devdata(pdev, dd);
+ dd = ERR_PTR(ret);
+ goto bail_unlock;
+ }
+
+ if (dd->ipath_unit >= atomic_read(&ipath_max))
+ atomic_set(&ipath_max, dd->ipath_unit + 1);
+
+bail_unlock:
+ spin_unlock_irqrestore(&unit_table_lock, flags);
+
+bail:
+ return dd;
+}
+
+static inline struct ipath_devdata *__ipath_lookup(int unit)
+{
+ return idr_find(&unit_table, unit);
+}
+
+struct ipath_devdata *ipath_lookup(int unit)
+{
+ struct ipath_devdata *dd;
+ unsigned long flags;
+
+ spin_lock_irqsave(&unit_table_lock, flags);
+ dd = __ipath_lookup(unit);
+ spin_unlock_irqrestore(&unit_table_lock, flags);
+
+ return dd;
+}
+
+int ipath_count_units(int *npresentp, int *nupp, u32 *maxportsp)
+{
+ int nunits, npresent, nup;
+ unsigned long flags;
+ u32 maxports;
+ int i, max;
+
+ nunits = npresent = nup = maxports = 0;
+
+ spin_lock_irqsave(&unit_table_lock, flags);
+
+ max = atomic_read(&ipath_max);
+
+ for (i = 0; i < max; i++) {
+ struct ipath_devdata *dd = __ipath_lookup(i);
+ if (!dd)
+ continue;
+
+ if (dd->ipath_flags & IPATH_INITTED)
+ nunits++;
+ if ((dd->ipath_flags & IPATH_PRESENT) && dd->ipath_kregbase)
+ npresent++;
+ if (dd->ipath_lid &&
+ !(dd->ipath_flags & (IPATH_LINKDOWN | IPATH_LINKUNK)))
+ nup++;
+ if (dd->ipath_cfgports > maxports)
+ maxports = dd->ipath_cfgports;
+ }
+
+ spin_unlock_irqrestore(&unit_table_lock, flags);
+
+ if (npresentp)
+ *npresentp = npresent;
+ if (nupp)
+ *nupp = nup;
+ if (maxportsp)
+ *maxportsp = maxports;
+
+ return nunits;
+}
+
+static int init_port0_rcvhdrtail(struct pci_dev *pdev)
+{
+ int ret;
+
+ mutex_lock(&ipath_mutex);
+
+ if (!ipath_port0_rcvhdrtail) {
+ ipath_port0_rcvhdrtail =
+ pci_alloc_consistent(pdev,
+ IPATH_PORT0_RCVHDRTAIL_SIZE,
+ &ipath_port0_rcvhdrtail_dma);
+
+ if (!ipath_port0_rcvhdrtail) {
+ ret = -ENOMEM;
+ goto bail;
+ }
+ }
+ port0_rcvhdrtail_refs++;
+ ret = 0;
+
+bail:
+ mutex_unlock(&ipath_mutex);
+
+ return ret;
+}
+
+static void cleanup_port0_rcvhdrtail(struct pci_dev *pdev)
+{
+ mutex_lock(&ipath_mutex);
+
+ if (!--port0_rcvhdrtail_refs) {
+ pci_free_consistent(pdev, IPATH_PORT0_RCVHDRTAIL_SIZE,
+ ipath_port0_rcvhdrtail,
+ ipath_port0_rcvhdrtail_dma);
+ ipath_port0_rcvhdrtail = NULL;
+ }
+
+ mutex_unlock(&ipath_mutex);
+}
+
+/*
+ * These next two routines are placeholders in case we don't have per-arch
+ * code for controlling write combining. If explicit control of write
+ * combining is not available, performance will probably be awful.
+ */
+
+int __attribute__((weak)) ipath_enable_wc(struct ipath_devdata *dd)
+{
+ return -EOPNOTSUPP;
+}
+
+void __attribute__((weak)) ipath_disable_wc(struct ipath_devdata *dd)
+{
+}
+
+static int ipath_init_one(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+ int ret, len, j;
+ struct ipath_devdata *dd;
+ unsigned long long addr;
+ u32 bar0 = 0, bar1 = 0;
+ u8 rev;
+
+ ret = init_port0_rcvhdrtail(pdev);
+ if (ret < 0) {
+ printk(KERN_ERR IPATH_DRV_NAME
+ ": Could not allocate port0_rcvhdrtail: error %d\n",
+ -ret);
+ goto fail;
+ }
+
+ dd = ipath_alloc_devdata(pdev);
+ if (IS_ERR(dd)) {
+ ret = PTR_ERR(dd);
+ printk(KERN_ERR IPATH_DRV_NAME
+ ": Could not allocate devdata: error %d\n", -ret);
+ goto fail;
+ }
+
+ ipath_cdbg(VERBOSE, "initializing unit #%u\n", dd->ipath_unit);
+
+ read_bars(pdev, &bar0, &bar1);
+
+ ret = pci_enable_device(pdev);
+ if (ret) {
+ /* This can happen if we did a chip reset, and then failed
+ * to reprogram the BAR, or the chip reset due to an
+ * internal error. Both of these cases cause the BAR to be
+ * reset back to initial state. For the latter case, the AER
+ * sticky error bit at offset 0x718 should be set, but the
+ * Linux kernel doesn't yet know about that, it appears. If
+ * the original BAR was retained in the kernel data
+ * structures, this may be OK
+ */
+ ipath_dbg("pci_enable unit %u failed: error %d\n",
+ dd->ipath_unit, -ret);
+ }
+ addr = pci_resource_start(pdev, 0);
+ len = pci_resource_len(pdev, 0);
+ ipath_cdbg(VERBOSE, "regbase (0) %llx len %d irq %x, vend %x/%x "
+ "driver_data %lx\n", addr, len, pdev->irq, ent->vendor,
+ ent->device, ent->driver_data);
+
+ read_bars(pdev, &bar0, &bar1);
+
+ if (!bar1 && !(bar0 & ~0xf)) {
+ if (addr) {
+ dev_info(&pdev->dev, "BAR is 0 (probable RESET), "
+ "rewriting as %llx\n", addr);
+ ret = pci_write_config_dword(
+ pdev, PCI_BASE_ADDRESS_0, addr);
+ if (ret)
+ dev_err(&pdev->dev, "rewrite of BAR0 "
+ "failed: err %d\n", -ret);
+ ret = pci_write_config_dword(
+ pdev, PCI_BASE_ADDRESS_1, addr >> 32);
+ if (ret)
+ dev_err(&pdev->dev, "rewrite of BAR1 "
+ "failed: err %d\n", -ret);
+ }
+ else
+ dev_err(&pdev->dev, "BAR is 0 (probable RESET), "
+ "not usable until reboot\n");
+ }
+
+ ret = pci_request_regions(pdev, IPATH_DRV_NAME);
+ if (ret)
+ dev_info(&pdev->dev, "pci_request_regions unit %u fails: "
+ "err %d\n", dd->ipath_unit, -ret);
+
+ ret = pci_set_dma_mask(pdev, DMA_64BIT_MASK);
+ if (ret)
+ dev_info(&pdev->dev, "pci_set_dma_mask unit %u "
+ "fails: %d\n", dd->ipath_unit, ret);
+
+ pci_set_master(pdev); /* probably not be needed for HT */
+
+ /*
+ * Save BARs to rewrite after device reset. Save all 64 bits of
+ * BAR, just in case.
+ */
+ dd->ipath_pcibar0 = addr;
+ dd->ipath_pcibar1 = addr >> 32;
+ dd->ipath_deviceid = ent->device; /* save for later use */
+ dd->ipath_vendorid = ent->vendor;
+
+ /* setup the chip-specific functions, as early as possible. */
+ switch (ent->device) {
+ case PCI_DEVICE_ID_INFINIPATH_HT:
+ ipath_init_ht400_funcs(dd);
+ break;
+ case PCI_DEVICE_ID_INFINIPATH_PE800:
+ ipath_init_pe800_funcs(dd);
+ break;
+ default:
+ ipath_dev_err(dd, "Found unknown PathScale deviceid 0x%x, "
+ "failing\n", ent->device);
+ return -ENODEV;
+ }
+
+ for (j = 0; j < 6; j++) {
+ if (!pdev->resource[j].start)
+ continue;
+ ipath_cdbg(VERBOSE, "BAR %d start %lx, end %lx, len %lx\n",
+ j, pdev->resource[j].start,
+ pdev->resource[j].end,
+ pci_resource_len(pdev, j));
+ }
+
+ pci_set_master(pdev);
+
+ if (!addr) {
+ ipath_dev_err(dd, "No valid address in BAR 0!\n");
+ return -ENODEV;
+ }
+
+ dd->ipath_deviceid = ent->device; /* save for later use */
+ dd->ipath_vendorid = ent->vendor;
+
+ ret = pci_read_config_byte(pdev, PCI_REVISION_ID, &rev);
+ if (ret) {
+ ipath_dev_err(dd, "Failed to read PCI revision ID unit "
+ "%u: err %d\n", dd->ipath_unit, -ret);
+ return ret; /* shouldn't ever happen */
+ } else
+ dd->ipath_pcirev = rev;
+
+ dd->ipath_kregbase = ioremap_nocache(addr, len);
+#if defined (pgprot_writecombine) && defined(_PAGE_MA_WC)
+ ipath_cdbg(VERBOSE, "Remapping pages WC\n");
+ remap_area_pages((unsigned long)dd->ipath_kregbase +
+ 1024 * 1024, addr + 1024 * 1024, 1024 * 1024,
+ _PAGE_MA_WC);
+ /* dd->ipath_kregbase = __ioremap(addr, len, _PAGE_MA_WC); */
+#endif
+
+ if (!dd->ipath_kregbase) {
+ ipath_dbg("Unable to map io addr %llx to kvirt, failing\n",
+ addr);
+ ret = -ENOMEM;
+ goto fail;
+ }
+ dd->ipath_kregend = (u64 __iomem *)
+ ((void __iomem *)dd->ipath_kregbase + len);
+ dd->ipath_physaddr = addr; /* used for io_remap, etc. */
+ /* for user mmap */
+ dd->ipath_kregvirt = (u64 __iomem *) phys_to_virt(addr);
+ ipath_cdbg(VERBOSE, "mapped io addr %llx to kregbase %p "
+ "kregvirt %p\n", addr, dd->ipath_kregbase,
+ dd->ipath_kregvirt);
+
+ /* set these up before registering the interrupt handler */
+ dd->pcidev = pdev;
+ pci_set_drvdata(pdev, dd);
+
+ /*
+ * clear ipath_flags here instead of in ipath_init_chip as it is set
+ * by ipath_setup_htconfig.
+ */
+ dd->ipath_flags = 0;
+
+ if (dd->ipath_f_bus(dd, pdev))
+ ipath_dev_err(dd, "Failed to setup config space; "
+ "continuing anyway\n");
+
+ /*
+ * set up our interrupt handler; SA_SHIRQ probably not needed,
+ * but won't hurt for now.
+ * check 0 irq after we return from chip-specific bus setup, since
+ * that can affect this due to setup
+ */
+ if (!pdev->irq)
+ ipath_dev_err(dd, "irq is 0, BIOS error? Interrupts won't "
+ "work\n");
+ else {
+ ret = request_irq(pdev->irq, ipath_intr, SA_SHIRQ,
+ IPATH_DRV_NAME, dd);
+ if (ret)
+ ipath_dev_err(dd, "Couldn't setup irq handler, "
+ "irq=%u: %d\n", pdev->irq, ret);
+ }
+
+ ret = ipath_init_chip(dd, 0); /* do the chip-specific init */
+
+ if (!ret) {
+ ret = ipath_enable_wc(dd);
+
+ if (ret) {
+ ipath_dev_err(dd, "Write combining not enabled "
+ "(err %d): performance may be poor\n",
+ -ret);
+ ret = 0;
+ }
+ }
+
+ if (dd->ipath_kregbase && (dd->ipath_flags & IPATH_PRESENT)) {
+ if (!dd->ipath_f_intrsetup(dd)) {
+ /* now we can enable interrupts from the chip */
+ /* enable all interrupts */
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_intmask,
+ -1LL);
+ /* force re-interrupt of any pending interrupts. */
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_intclear,
+ 0ULL);
+ /* chip is usable; mark it as initialized */
+ *dd->ipath_statusp |= IPATH_STATUS_INITTED;
+ } else
+ ipath_dev_err(dd, "No interrupts enabled, couldn't "
+ "setup interrupt address\n");
+ }
+ else if (ret != -EPERM)
+ dev_info(&pdev->dev, "Not configuring unit %u "
+ "interrupts, init failed\n", dd->ipath_unit);
+
+ ipath_device_create_group(&pdev->dev, dd);
+ ipath_user_add(dd);
+
+ /*
+ * We used to cleanup here, with pci_release_regions, etc. but that
+ * can cause other problems if we want to run diags, etc., so
+ * instead defer that until driver unload. As long as the driver is
+ * unloaded, no memory leaks result.
+ */
+
+fail: /* after we've done at least some of the pci setup */
+ if (ret == -EPERM)
+ /*
+ * disabled device, don't want module load error; just want
+ * to carry status through to this point
+ */
+ ret = 0;
+
+ return ret;
+}
+
+static void __devexit ipath_remove_one(struct pci_dev *pdev)
+{
+ struct ipath_devdata *dd;
+
+ ipath_cdbg(VERBOSE, "removing, pdev=%p\n", pdev);
+ if (!pdev)
+ return;
+
+ dd = pci_get_drvdata(pdev);
+ ipath_user_del(dd);
+ ipath_device_remove_group(&pdev->dev, dd);
+ pci_set_drvdata(pdev, NULL);
+ ipath_cdbg(VERBOSE, "Releasing pci memory regions, dd %p, "
+ "unit %u\n", dd, (u32) dd->ipath_unit);
+ if (dd->ipath_kregbase) {
+ ipath_cdbg(VERBOSE, "Unmapping kregbase %p\n",
+ dd->ipath_kregbase);
+ iounmap((volatile void __iomem *)dd->ipath_kregbase);
+ dd->ipath_kregbase = NULL;
+ }
+ pci_release_regions(pdev);
+ ipath_cdbg(VERBOSE, "calling pci_disable_device\n");
+ pci_disable_device(pdev);
+
+ ipath_free_devdata(pdev, dd);
+ cleanup_port0_rcvhdrtail(pdev);
+}
+
+/* general driver use */
+DEFINE_MUTEX(ipath_mutex);
+static DEFINE_SPINLOCK(ipath_pioavail_lock);
+
+/**
+ * ipath_disarm_piobufs - cancel a range of PIO buffers
+ * @dd: the infinipath device
+ * @first: the first PIO buffer to cancel
+ * @cnt: the number of PIO buffers to cancel
+ *
+ * cancel a range of PIO buffers, used when they might be armed, but
+ * not triggered. Used at init to ensure buffer state, and also user
+ * process close, in case it died while writing to a PIO buffer
+ * Also after errors.
+ */
+void ipath_disarm_piobufs(struct ipath_devdata *dd, unsigned first,
+ unsigned cnt)
+{
+ unsigned i, last = first + cnt;
+ u64 sendctrl, sendorig;
+
+ ipath_cdbg(PKT, "disarm %u PIObufs first=%u\n", cnt, first);
+ sendorig = dd->ipath_sendctrl | INFINIPATH_S_DISARM;
+ for (i = first; i < last; i++) {
+ sendctrl = sendorig |
+ (i << INFINIPATH_S_DISARMPIOBUF_SHIFT);
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl,
+ sendctrl);
+ }
+ // write it again with current value, in case ipath_sendctrl changed
+ // while we were looping; no critical bits that would require
+ // locking
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl,
+ dd->ipath_sendctrl);
+}
+
+/**
+ * ipath_wait_linkstate - wait for an IB link state change to occur
+ * @dd: the infinipath device
+ * @state: the state to wait for
+ * @msecs: the number of milliseconds to wait
+ *
+ * wait up to msecs milliseconds for IB link state change to occur for
+ * now, take the easy polling route. Currently used only by
+ * ipath_layer_set_linkstate. Returns 0 if state reached, otherwise
+ * -ETIMEDOUT state can have multiple states set, for any of several
+ * transitions.
+ */
+int ipath_wait_linkstate(struct ipath_devdata *dd, u32 state, int msecs)
+{
+ dd->ipath_sma_state_wanted = state;
+ wait_event_interruptible_timeout(ipath_sma_state_wait,
+ (dd->ipath_flags & state),
+ msecs_to_jiffies(msecs));
+ dd->ipath_sma_state_wanted = 0;
+
+ if (!(dd->ipath_flags & state)) {
+ u64 val;
+ ipath_cdbg(SMA, "Didn't reach linkstate %s within %u ms\n",
+ /* test INIT ahead of DOWN, both can be set */
+ (state & IPATH_LINKINIT) ? "INIT" :
+ ((state & IPATH_LINKDOWN) ? "DOWN" :
+ ((state & IPATH_LINKARMED) ? "ARM" : "ACTIVE")),
+ msecs);
+ val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_ibcstatus);
+ ipath_cdbg(VERBOSE, "ibcc=%llx ibcstatus=%llx (%s)\n",
+ (unsigned long long) ipath_read_kreg64(
+ dd, dd->ipath_kregs->kr_ibcctrl),
+ (unsigned long long) val,
+ ipath_ibcstatus_str[val & 0xf]);
+ }
+ return (dd->ipath_flags & state) ? 0 : -ETIMEDOUT;
+}
+
+/**
+ * ipath_nopage - page fault handler
+ * @vma: the VM area
+ * @addr: the address that caused the fault
+ * @type: the output fault type
+ *
+ * For each page that is first faulted in from the
+ * mmap'ed shared address buffer, this routine is called.
+ * It's always for a single page.
+ * We use the low bits of the private_data field to tell us which case
+ * we are dealing with.
+ */
+
+struct page *ipath_nopage(struct vm_area_struct *vma, unsigned long addr,
+ int *type)
+{
+ /* original [kv]malloc virtual address */
+ unsigned long avirt;
+ /* physical address */
+ unsigned long paddr;
+ /* calculated page offset */
+ unsigned long off;
+ u32 which, chunk;
+ void *vaddr = NULL;
+ struct ipath_portdata *pd;
+ struct page *vpage = NOPAGE_SIGBUS;
+
+ avirt = (unsigned long) vma->vm_private_data;
+
+ if (!avirt) {
+ ipath_dbg("NULL private_data, vm_pgoff %lx\n",
+ vma->vm_pgoff);
+ which = 0; /* quiet incorrect gcc warning */
+ goto done;
+ }
+ which = avirt & 3;
+ avirt &= ~3ULL;
+
+ if (addr > vma->vm_end) {
+ ipath_dbg("trying to fault in addr %lx past end\n", addr);
+ goto done;
+ }
+
+ /*
+ * rcvhdr Q is physically contiguous.
+ * pgoff is virtual.
+ */
+ switch (which) {
+ case 1: /* rcvhdrq_phys */
+ /* should always be 0 */
+ off = vma->vm_pgoff - (avirt >> PAGE_SHIFT);
+ paddr = addr - vma->vm_start + (off << PAGE_SHIFT) + avirt;
+ ipath_cdbg(MM, "hdrq %lx (u=%lx)\n", paddr, addr);
+ vpage = pfn_to_page(paddr >> PAGE_SHIFT);
+ break;
+ case 2: /* PIO buffer avail regs */
+ /* should always be 0 */
+ off = vma->vm_pgoff - (avirt >> PAGE_SHIFT);
+ paddr = (addr - vma->vm_start + (off << PAGE_SHIFT) +
+ avirt);
+ ipath_cdbg(MM, "pioav %lx\n", paddr);
+ vpage = pfn_to_page(paddr >> PAGE_SHIFT);
+ break;
+ case 3:
+ /*
+ * rcvegrbufs; page_alloc()'ed like rcvhdrq, but we
+ * have to pick out which page_alloc()'ed chunk it is.
+ */
+ pd = (struct ipath_portdata *)avirt;
+ /* this should always be 0 */
+ off =
+ vma->vm_pgoff -
+ ((unsigned long)pd->port_rcvegr_phys >> PAGE_SHIFT);
+ off = (addr - vma->vm_start + (off << PAGE_SHIFT));
+
+ chunk = off / pd->port_rcvegrbuf_size;
+ if (chunk > pd->port_rcvegrbuf_chunks)
+ ipath_dbg("Bad egrbuf chunk %u (max %u); "
+ "off = %lx\n", chunk,
+ pd->port_rcvegrbuf_chunks, off);
+ vaddr = pd->port_rcvegrbuf[chunk] +
+ off % pd->port_rcvegrbuf_size;
+ paddr = pd->port_rcvegrbuf_phys[chunk] +
+ off % pd->port_rcvegrbuf_size;
+ vpage = pfn_to_page(paddr >> PAGE_SHIFT);
+ ipath_cdbg(MM, "egrb %p,%lx\n", vaddr, paddr);
+ break;
+ default:
+ ipath_dbg("trying to fault in mmap addr %lx (avirt %lx) "
+ "that isn't known (case %u)\n", addr, avirt,
+ which);
+ }
+
+done:
+ if (vpage != NOPAGE_SIGBUS && vpage != NOPAGE_OOM) {
+ if (which == 2)
+ /*
+ * media/video/video-buf.c doesn't do get_page()
+ * for buffer from alloc_page(). Hmmm.
+ *
+ * keep it from being swapped, complaints if process
+ * exits before we [kv]free it, etc, and keep shared
+ * page counts correct, etc.
+ */
+ get_page(vpage);
+ mark_page_accessed(vpage);
+ if (type)
+ *type = VM_FAULT_MINOR;
+ } else
+ ipath_dbg("faultin of addr %lx vaddr %p avirt %lx failed\n",
+ addr, vaddr, avirt);
+
+ return vpage;
+}
+
+void ipath_decode_err(char *buf, size_t blen, ipath_err_t err)
+{
+ *buf = '\0';
+ if (err & INFINIPATH_E_RHDRLEN)
+ strlcat(buf, "rhdrlen ", blen);
+ if (err & INFINIPATH_E_RBADTID)
+ strlcat(buf, "rbadtid ", blen);
+ if (err & INFINIPATH_E_RBADVERSION)
+ strlcat(buf, "rbadversion ", blen);
+ if (err & INFINIPATH_E_RHDR)
+ strlcat(buf, "rhdr ", blen);
+ if (err & INFINIPATH_E_RLONGPKTLEN)
+ strlcat(buf, "rlongpktlen ", blen);
+ if (err & INFINIPATH_E_RSHORTPKTLEN)
+ strlcat(buf, "rshortpktlen ", blen);
+ if (err & INFINIPATH_E_RMAXPKTLEN)
+ strlcat(buf, "rmaxpktlen ", blen);
+ if (err & INFINIPATH_E_RMINPKTLEN)
+ strlcat(buf, "rminpktlen ", blen);
+ if (err & INFINIPATH_E_RFORMATERR)
+ strlcat(buf, "rformaterr ", blen);
+ if (err & INFINIPATH_E_RUNSUPVL)
+ strlcat(buf, "runsupvl ", blen);
+ if (err & INFINIPATH_E_RUNEXPCHAR)
+ strlcat(buf, "runexpchar ", blen);
+ if (err & INFINIPATH_E_RIBFLOW)
+ strlcat(buf, "ribflow ", blen);
+ if (err & INFINIPATH_E_REBP)
+ strlcat(buf, "EBP ", blen);
+ if (err & INFINIPATH_E_SUNDERRUN)
+ strlcat(buf, "sunderrun ", blen);
+ if (err & INFINIPATH_E_SPIOARMLAUNCH)
+ strlcat(buf, "spioarmlaunch ", blen);
+ if (err & INFINIPATH_E_SUNEXPERRPKTNUM)
+ strlcat(buf, "sunexperrpktnum ", blen);
+ if (err & INFINIPATH_E_SDROPPEDDATAPKT)
+ strlcat(buf, "sdroppeddatapkt ", blen);
+ if (err & INFINIPATH_E_SDROPPEDSMPPKT)
+ strlcat(buf, "sdroppedsmppkt ", blen);
+ if (err & INFINIPATH_E_SMAXPKTLEN)
+ strlcat(buf, "smaxpktlen ", blen);
+ if (err & INFINIPATH_E_SMINPKTLEN)
+ strlcat(buf, "sminpktlen ", blen);
+ if (err & INFINIPATH_E_SUNSUPVL)
+ strlcat(buf, "sunsupVL ", blen);
+ if (err & INFINIPATH_E_SPKTLEN)
+ strlcat(buf, "spktlen ", blen);
+ if (err & INFINIPATH_E_INVALIDADDR)
+ strlcat(buf, "invalidaddr ", blen);
+ if (err & INFINIPATH_E_RICRC)
+ strlcat(buf, "CRC ", blen);
+ if (err & INFINIPATH_E_RVCRC)
+ strlcat(buf, "VCRC ", blen);
+ if (err & INFINIPATH_E_RRCVEGRFULL)
+ strlcat(buf, "rcvegrfull ", blen);
+ if (err & INFINIPATH_E_RRCVHDRFULL)
+ strlcat(buf, "rcvhdrfull ", blen);
+ if (err & INFINIPATH_E_IBSTATUSCHANGED)
+ strlcat(buf, "ibcstatuschg ", blen);
+ if (err & INFINIPATH_E_RIBLOSTLINK)
+ strlcat(buf, "riblostlink ", blen);
+ if (err & INFINIPATH_E_HARDWARE)
+ strlcat(buf, "hardware ", blen);
+ if (err & INFINIPATH_E_RESET)
+ strlcat(buf, "reset ", blen);
+}
+
+/**
+ * get_rhf_errstring - decode RHF errors
+ * @err: the err number
+ * @msg: the output buffer
+ * @len: the length of the output buffer
+ *
+ * only used one place now, may want more later
+ */
+static void get_rhf_errstring(u32 err, char *msg, size_t len)
+{
+ /* if no errors, and so don't need to check what's first */
+ *msg = '\0';
+
+ if (err & INFINIPATH_RHF_H_ICRCERR)
+ strlcat(msg, "icrcerr ", len);
+ if (err & INFINIPATH_RHF_H_VCRCERR)
+ strlcat(msg, "vcrcerr ", len);
+ if (err & INFINIPATH_RHF_H_PARITYERR)
+ strlcat(msg, "parityerr ", len);
+ if (err & INFINIPATH_RHF_H_LENERR)
+ strlcat(msg, "lenerr ", len);
+ if (err & INFINIPATH_RHF_H_MTUERR)
+ strlcat(msg, "mtuerr ", len);
+ if (err & INFINIPATH_RHF_H_IHDRERR)
+ /* infinipath hdr checksum error */
+ strlcat(msg, "ipathhdrerr ", len);
+ if (err & INFINIPATH_RHF_H_TIDERR)
+ strlcat(msg, "tiderr ", len);
+ if (err & INFINIPATH_RHF_H_MKERR)
+ /* bad port, offset, etc. */
+ strlcat(msg, "invalid ipathhdr ", len);
+ if (err & INFINIPATH_RHF_H_IBERR)
+ strlcat(msg, "iberr ", len);
+ if (err & INFINIPATH_RHF_L_SWA)
+ strlcat(msg, "swA ", len);
+ if (err & INFINIPATH_RHF_L_SWB)
+ strlcat(msg, "swB ", len);
+}
+
+/**
+ * ipath_get_egrbuf - get an eager buffer
+ * @dd: the infinipath device
+ * @bufnum: the eager buffer to get
+ * @err: unused
+ *
+ * must only be called if ipath_pd[port] is known to be allocated
+ */
+static inline void *ipath_get_egrbuf(struct ipath_devdata *dd, u32 bufnum,
+ int err)
+{
+ return dd->ipath_port0_skbs ?
+ (void *)dd->ipath_port0_skbs[bufnum]->data : NULL;
+
+#ifdef _USE_FOR_DEBUGGING_ONLY
+ /*
+ * want routine to be inlined and fast this is here so if we do
+ * ports other than 0, I don't have to rewrite the code, since it's
+ * slightly complicated
+ */
+ if (port != 1) {
+ void *chunkbase;
+ /*
+ * This calculation takes about 50 cycles. Could do what I
+ * did for protocol code, and have an array of addresses,
+ * getting it down to just a few cycles per lookup, at the
+ * cost of 16KB of memory.
+ */
+ if (!dd->ipath_pd[port]->port_rcvegrbuf_virt)
+ return NULL;
+ chunkbase = dd->ipath_pd[port]->port_rcvegrbuf_virt
+ [bufnum /
+ dd->ipath_pd[port]->port_rcvegrbufs_perchunk];
+ return (void *)(chunkbase +
+ (bufnum %
+ dd->ipath_pd[port]->
+ port_rcvegrbufs_perchunk)
+ * dd->ipath_rcvegrbufsize);
+ }
+#endif
+}
+
+/*
+ * ipath_rcv_sma - receive an sma packet
+ * @dd: the infinipath device
+ * @tlen: the total packet len
+ * @rc: the packet header
+ * @ebuf: the packet data
+ *
+ * Separate for better overall optimization
+ */
+static void ipath_rcv_sma(struct ipath_devdata *dd, u32 tlen, u64 * rc,
+ void *ebuf)
+{
+ int sindex, slen, elen;
+ void *smbuf;
+ u8 pad, *bthbytes;
+
+ /* another SMA packet received */
+ ipath_stats.sps_sma_rpkts++;
+
+ bthbytes = (u8 *) ((struct ips_message_header *)&rc[1])->bth;
+
+ pad = (bthbytes[1] >> 4) & 3;
+ elen = tlen - (IPATH_SMA_HDRSZ + pad + (u32) sizeof(u32));
+ if (elen > (IPATH_SMA_MAX_PKTSZ - IPATH_SMA_HDRSZ))
+ elen = IPATH_SMA_MAX_PKTSZ - IPATH_SMA_HDRSZ;
+
+ spin_lock_irq(&ipath_sma_lock);
+ sindex = ipath_sma_next;
+ smbuf = ipath_sma_data[sindex].buf;
+ ipath_sma_data[sindex].unit = dd->ipath_unit;
+ slen = ipath_sma_data[ipath_sma_next].len;
+ memcpy(smbuf, &rc[1], IPATH_SMA_HDRSZ);
+ memcpy(smbuf + IPATH_SMA_HDRSZ, ebuf, elen);
+ if (slen) {
+ /*
+ * overwriting a yet unread old one (buffer wrap),
+ * have to advance ipath_sma_first to next oldest
+ */
+
+ /* count OK packets that we drop */
+ ipath_stats.sps_krdrops++;
+ if (++ipath_sma_first >= IPATH_NUM_SMA_PKTS)
+ ipath_sma_first = 0;
+ }
+ slen = ipath_sma_data[sindex].len = elen + IPATH_SMA_HDRSZ;
+ if (++ipath_sma_next >= IPATH_NUM_SMA_PKTS)
+ ipath_sma_next = 0;
+ spin_unlock_irq(&ipath_sma_lock);
+}
+
+/**
+ * ipath_alloc_skb - allocate an skb and buffer with possible constraints
+ * @dd: the infinipath device
+ * @gfp_mask: the sk_buff SFP mask
+ */
+struct sk_buff *ipath_alloc_skb(struct ipath_devdata *dd,
+ gfp_t gfp_mask)
+{
+ struct sk_buff *skb;
+ u32 len;
+
+ /*
+ * Only fully supported way to handle this is to allocate lots
+ * extra, align as needed, and then do skb_reserve(). That wastes
+ * a lot of memory... I'll have to hack this into infinipath_copy
+ * also.
+ */
+
+ /*
+ * We need 4 extra bytes for unaligned transfer copying
+ */
+ if (dd->ipath_flags & IPATH_4BYTE_TID) {
+ /* we need a 4KB multiple alignment, and there is no way
+ * to do it except to allocate extra and then skb_reserve
+ * enough to bring it up to the right alignment.
+ */
+ len = dd->ipath_ibmaxlen + 4 + (1 << 11) - 1;
+ }
+ else
+ len = dd->ipath_ibmaxlen + 4;
+ skb = __dev_alloc_skb(len, gfp_mask);
+ if (!skb) {
+ dev_err(&dd->pcidev->dev, "Failed to allocate skbuff, "
+ "length %u\n", len);
+ return NULL;
+ }
+ if (dd->ipath_flags & IPATH_4BYTE_TID) {
+ u32 una = ((1 << 11) - 1) & (unsigned long)(skb->data + 4);
+ if (una)
+ skb_reserve(skb, 4 + (1 << 11) - una);
+ else
+ skb_reserve(skb, 4);
+ } else
+ skb_reserve(skb, 4);
+ return skb;
+}
+
+/**
+ * ipath_rcv_layer - receive a packet for the layered (ethernet) driver
+ * @dd: the infinipath device
+ * @etail: the sk_buff number
+ * @tlen: the total packet length
+ * @hdr: the ethernet header
+ *
+ * Separate routine for better overall optimization
+ */
+static void ipath_rcv_layer(struct ipath_devdata *dd, u32 etail,
+ u32 tlen, struct ether_header *hdr)
+{
+ u32 elen;
+ u8 pad, *bthbytes;
+ struct sk_buff *skb, *nskb;
+
+ if (dd->ipath_port0_skbs && hdr->sub_opcode == OPCODE_ENCAP) {
+ /*
+ * Allocate a new sk_buff to replace the one we give
+ * to the network stack.
+ */
+ nskb = ipath_alloc_skb(dd, GFP_ATOMIC);
+ if (!nskb) {
+ /* count OK packets that we drop */
+ ipath_stats.sps_krdrops++;
+ return;
+ }
+
+ bthbytes = (u8 *) hdr->bth;
+ pad = (bthbytes[1] >> 4) & 3;
+ /* +CRC32 */
+ elen = tlen - (sizeof(*hdr) + pad + sizeof(u32));
+
+ skb = dd->ipath_port0_skbs[etail];
+ dd->ipath_port0_skbs[etail] = nskb;
+ skb_put(skb, elen);
+
+ dd->ipath_f_put_tid(dd, etail + (u64 __iomem *)
+ ((char __iomem *) dd->ipath_kregbase
+ + dd->ipath_rcvegrbase), 0,
+ virt_to_phys(nskb->data));
+
+ dd->ipath_layer.l_rcv(dd->ipath_unit, hdr, skb);
+
+ /* another ether packet received */
+ ipath_stats.sps_ether_rpkts++;
+ } else if (hdr->sub_opcode == OPCODE_LID_ARP) {
+ if (dd->ipath_layer.l_rcv_lid)
+ dd->ipath_layer.l_rcv_lid(dd->ipath_unit, hdr);
+ }
+}
+
+/*
+ * ipath_kreceive - receive a packet
+ * @dd: the infinipath device
+ *
+ * called from interrupt handler for errors or receive interrupt
+ */
+void ipath_kreceive(struct ipath_devdata *dd)
+{
+ u64 *rc;
+ void *ebuf;
+ const u32 rsize = dd->ipath_rcvhdrentsize; /* words */
+ const u32 maxcnt = dd->ipath_rcvhdrcnt * rsize; /* words */
+ u32 etail = -1, l, hdrqtail, sma_this_time = 0;
+ struct ips_message_header *hdr;
+ u32 eflags, i, etype, tlen, pkttot = 0;
+ static u64 totcalls; /* stats, may eventually remove */
+ char emsg[128];
+
+ if (!dd->ipath_hdrqtailptr) {
+ ipath_dev_err(dd,
+ "hdrqtailptr not set, can't do receives\n");
+ return;
+ }
+
+ if (test_and_set_bit(0, &dd->ipath_rcv_pending)) {
+ /* There is already a thread processing this queue. */
+ return;
+ }
+
+ if (dd->ipath_port0head ==
+ (uint32_t)__le64_to_cpu(*dd->ipath_hdrqtailptr))
+ goto done;
+
+gotmore:
+ /*
+ * read only once at start. If in flood situation, this helps
+ * performance slightly. If more arrive while we are processing,
+ * we'll come back here and do them
+ */
+ hdrqtail = (uint32_t)__le64_to_cpu(*dd->ipath_hdrqtailptr);
+
+ for (i = 0, l = dd->ipath_port0head; l != hdrqtail; i++) {
+ u32 qp;
+ u8 *bthbytes;
+
+ rc = (u64 *) (dd->ipath_pd[0]->port_rcvhdrq + (l << 2));
+ hdr = (struct ips_message_header *)&rc[1];
+ /*
+ * could make a network order version of IPATH_KD_QP, and
+ * do the obvious shift before masking to speed this up.
+ */
+ qp = ntohl(hdr->bth[1]) & 0xffffff;
+ bthbytes = (u8 *) hdr->bth;
+
+ eflags = ips_get_hdr_err_flags((u32 *) rc);
+ etype = ips_get_rcv_type((u32 *) rc);
+ /* total length */
+ tlen = ips_get_length_in_bytes((u32 *) rc);
+ ebuf = NULL;
+ if (etype != RCVHQ_RCV_TYPE_EXPECTED) {
+ /*
+ * it turns out that the chips uses an eager buffer
+ * for all non-expected packets, whether it "needs"
+ * one or not. So always get the index, but don't
+ * set ebuf (so we try to copy data) unless the
+ * length requires it.
+ */
+ etail = ips_get_index((u32 *) rc);
+ if (tlen > sizeof(*hdr) ||
+ etype == RCVHQ_RCV_TYPE_NON_KD)
+ ebuf = ipath_get_egrbuf(dd, etail, 0);
+ }
+
+ /*
+ * both tiderr and ipathhdrerr are set for all plain IB
+ * packets; only ipathhdrerr should be set.
+ */
+
+ if (etype != RCVHQ_RCV_TYPE_NON_KD &&
+ etype != RCVHQ_RCV_TYPE_ERROR &&
+ ips_get_ipath_ver(hdr->iph.ver_port_tid_offset) !=
+ IPS_PROTO_VERSION) {
+ ipath_cdbg(PKT, "Bad InfiniPath protocol version "
+ "%x\n", etype);
+ }
+
+ if (eflags & ~(INFINIPATH_RHF_H_TIDERR |
+ INFINIPATH_RHF_H_IHDRERR)) {
+ get_rhf_errstring(eflags, emsg, sizeof emsg);
+ ipath_cdbg(PKT, "RHFerrs %x hdrqtail=%x typ=%u "
+ "tlen=%x opcode=%x egridx=%x: %s\n",
+ eflags, l, etype, tlen, bthbytes[0],
+ ips_get_index((u32 *) rc), emsg);
+ } else if (etype == RCVHQ_RCV_TYPE_NON_KD) {
+ /*
+ * If there is a userland SMA and this is a MAD
+ * packet, then pass it to the userland SMA.
+ */
+ if (atomic_read(&ipath_sma_alive) && qp <= 1) {
+ /*
+ * count OK packets that we drop because
+ * SMA isn't yet running, or because we
+ * are in an sma flood (no point in
+ * constantly acquiring the spin lock, and
+ * overwriting previous packets).
+ * Eventually things will recover.
+ * Similarly if the sma consumer is
+ * so far behind that we would overwrite
+ * (yes, it's outside the lock)
+ */
+ if (!ipath_sma_data_spare ||
+ ipath_sma_data[ipath_sma_next].len ||
+ ++sma_this_time > IPATH_NUM_SMA_PKTS)
+ ipath_stats.sps_krdrops++;
+ else if (ebuf)
+ ipath_rcv_sma(dd, tlen, rc, ebuf);
+ }
+ else if (dd->verbs_layer.l_rcv)
+ dd->verbs_layer.l_rcv(dd->ipath_unit,
+ rc + 1,
+ ebuf, tlen);
+ else
+ ipath_cdbg(VERBOSE, "received IB packet, "
+ "not SMA (QP=%x)\n", qp);
+ } else if (etype == RCVHQ_RCV_TYPE_EAGER) {
+ if (qp == IPATH_KD_QP && bthbytes[0] ==
+ dd->ipath_layer.l_rcv_opcode && ebuf)
+ ipath_rcv_layer(dd, etail, tlen,
+ (struct ether_header *)hdr);
+ else
+ ipath_cdbg(PKT, "typ %x, opcode %x (eager, "
+ "qp=%x), len %x; ignored\n",
+ etype, bthbytes[0], qp, tlen);
+ }
+ else if (etype == RCVHQ_RCV_TYPE_EXPECTED)
+ ipath_dbg("Bug: Expected TID, opcode %x; ignored\n",
+ hdr->bth[0] & 0xff);
+ else if (eflags & (INFINIPATH_RHF_H_TIDERR |
+ INFINIPATH_RHF_H_IHDRERR)) {
+ /*
+ * This is a type 3 packet, only the LRH is in the
+ * rcvhdrq, the rest of the header is in the eager
+ * buffer.
+ */
+ u8 opcode;
+ if (ebuf) {
+ bthbytes = (u8 *) ebuf;
+ opcode = *bthbytes;
+ }
+ else
+ opcode = 0;
+ get_rhf_errstring(eflags, emsg, sizeof emsg);
+ ipath_dbg("Err %x (%s), opcode %x, egrbuf %x, "
+ "len %x\n", eflags, emsg, opcode, etail,
+ tlen);
+ } else {
+ /*
+ * error packet, type of error unknown.
+ * Probably type 3, but we don't know, so don't
+ * even try to print the opcode, etc.
+ */
+ ipath_dbg("Error Pkt, but no eflags! egrbuf %x, "
+ "len %x\nhdrq@%lx;hdrq+%x rhf: %llx; "
+ "hdr %llx %llx %llx %llx %llx\n",
+ etail, tlen, (unsigned long) rc, l,
+ (unsigned long long) rc[0],
+ (unsigned long long) rc[1],
+ (unsigned long long) rc[2],
+ (unsigned long long) rc[3],
+ (unsigned long long) rc[4],
+ (unsigned long long) rc[5]);
+ }
+ l += rsize;
+ if (l >= maxcnt)
+ l = 0;
+ /*
+ * update for each packet, to help prevent overflows if we
+ * have lots of packets.
+ */
+ (void)ipath_write_ureg(dd, ur_rcvhdrhead,
+ dd->ipath_rhdrhead_intr_off | l, 0);
+ if (etype != RCVHQ_RCV_TYPE_EXPECTED)
+ (void)ipath_write_ureg(dd, ur_rcvegrindexhead,
+ etail, 0);
+ }
+
+ pkttot += i;
+
+ dd->ipath_port0head = l;
+
+ if (hdrqtail != (uint32_t)__le64_to_cpu(*dd->ipath_hdrqtailptr))
+ /* more arrived while we handled first batch */
+ goto gotmore;
+
+ if (pkttot > ipath_stats.sps_maxpkts_call)
+ ipath_stats.sps_maxpkts_call = pkttot;
+ ipath_stats.sps_port0pkts += pkttot;
+ ipath_stats.sps_avgpkts_call =
+ ipath_stats.sps_port0pkts / ++totcalls;
+
+ if (sma_this_time) /* only once at end, not each time */
+ wake_up_interruptible(&ipath_sma_wait);
+
+done:
+ clear_bit(0, &dd->ipath_rcv_pending);
+ smp_mb__after_clear_bit();
+}
+
+/**
+ * ipath_update_pio_bufs - update shadow copy of the PIO availability map
+ * @dd: the infinipath device
+ *
+ * called whenever our local copy indicates we have run out of send buffers
+ * NOTE: This can be called from interrupt context by some code
+ * and from non-interrupt context by ipath_getpiobuf().
+ */
+
+static void ipath_update_pio_bufs(struct ipath_devdata *dd)
+{
+ unsigned long flags;
+ int i;
+ const unsigned piobregs = (unsigned)dd->ipath_pioavregs;
+
+ /* If the generation (check) bits have changed, then we update the
+ * busy bit for the corresponding PIO buffer. This algorithm will
+ * modify positions to the value they already have in some cases
+ * (i.e., no change), but it's faster than changing only the bits
+ * that have changed.
+ *
+ * We would like to do this atomicly, to avoid spinlocks in the
+ * critical send path, but that's not really possible, given the
+ * type of changes, and that this routine could be called on
+ * multiple cpu's simultaneously, so we lock in this routine only,
+ * to avoid conflicting updates; all we change is the shadow, and
+ * it's a single 64 bit memory location, so by definition the update
+ * is atomic in terms of what other cpu's can see in testing the
+ * bits. The spin_lock overhead isn't too bad, since it only
+ * happens when all buffers are in use, so only cpu overhead, not
+ * latency or bandwidth is affected.
+ */
+#define _IPATH_ALL_CHECKBITS 0x5555555555555555ULL
+ if (!dd->ipath_pioavailregs_dma) {
+ ipath_dbg("Update shadow pioavail, but regs_dma NULL!\n");
+ return;
+ }
+ if (ipath_debug & __IPATH_VERBDBG) {
+ /* only if packet debug and verbose */
+ volatile unsigned long long *dma =
+ (volatile unsigned long long *)
+ dd->ipath_pioavailregs_dma;
+ unsigned long *shadow = dd->ipath_pioavailshadow;
+
+ ipath_cdbg(PKT, "Refill avail, dma0=%llx shad0=%lx, "
+ "d1=%llx s1=%lx, d2=%llx s2=%lx, d3=%llx "
+ "s3=%lx\n",
+ (unsigned long long) __le64_to_cpu(dma[0]),
+ shadow[0],
+ (unsigned long long) __le64_to_cpu(dma[1]),
+ shadow[1],
+ (unsigned long long) __le64_to_cpu(dma[2]),
+ shadow[2],
+ (unsigned long long) __le64_to_cpu(dma[3]),
+ shadow[3]);
+ if (piobregs > 4)
+ ipath_cdbg(PKT, "2nd group, dma4=%llx shad4=%lx, "
+ "d5=%llx s5=%lx, d6=%llx s6=%lx, "
+ "d7=%llx s7=%lx\n",
+ (unsigned long long) __le64_to_cpu(dma[4]),
+ shadow[4],
+ (unsigned long long) __le64_to_cpu(dma[5]),
+ shadow[5],
+ (unsigned long long) __le64_to_cpu(dma[6]),
+ shadow[6],
+ (unsigned long long) __le64_to_cpu(dma[7]),
+ shadow[7]);
+ }
+ spin_lock_irqsave(&ipath_pioavail_lock, flags);
+ for (i = 0; i < piobregs; i++) {
+ u64 pchbusy, pchg, piov, pnew;
+ /*
+ * Chip Errata: bug 6641; even and odd qwords>3 are swapped
+ */
+ if (i > 3) {
+ if (i & 1)
+ piov = __le64_to_cpu(dd->ipath_pioavailregs_dma[i - 1]);
+ else
+ piov = __le64_to_cpu(dd->ipath_pioavailregs_dma[i + 1]);
+ } else
+ piov = __le64_to_cpu(dd->ipath_pioavailregs_dma[i]);
+ pchg = _IPATH_ALL_CHECKBITS &
+ ~(dd->ipath_pioavailshadow[i] ^ piov);
+ pchbusy = pchg << INFINIPATH_SENDPIOAVAIL_BUSY_SHIFT;
+ if (pchg && (pchbusy & dd->ipath_pioavailshadow[i])) {
+ pnew = dd->ipath_pioavailshadow[i] & ~pchbusy;
+ pnew |= piov & pchbusy;
+ dd->ipath_pioavailshadow[i] = pnew;
+ }
+ }
+ spin_unlock_irqrestore(&ipath_pioavail_lock, flags);
+}
+
+/**
+ * ipath_setrcvhdrsize - set the receive header size
+ * @dd: the infinipath device
+ * @rhdrsize: the receive header size
+ *
+ * called from user init code, and also layered driver init
+ */
+int ipath_setrcvhdrsize(struct ipath_devdata *dd, unsigned rhdrsize)
+{
+ int ret = 0;
+
+ if (dd->ipath_flags & IPATH_RCVHDRSZ_SET) {
+ if (dd->ipath_rcvhdrsize != rhdrsize) {
+ dev_info(&dd->pcidev->dev,
+ "Error: can't set protocol header "
+ "size %u, already %u\n",
+ rhdrsize, dd->ipath_rcvhdrsize);
+ ret = -EAGAIN;
+ } else
+ ipath_cdbg(VERBOSE, "Reuse same protocol header "
+ "size %u\n", dd->ipath_rcvhdrsize);
+ } else if (rhdrsize > (dd->ipath_rcvhdrentsize -
+ (sizeof(u64) / sizeof(u32)))) {
+ ipath_dbg("Error: can't set protocol header size %u "
+ "(> max %u)\n", rhdrsize,
+ dd->ipath_rcvhdrentsize -
+ (u32) (sizeof(u64) / sizeof(u32)));
+ ret = -EOVERFLOW;
+ } else {
+ dd->ipath_flags |= IPATH_RCVHDRSZ_SET;
+ dd->ipath_rcvhdrsize = rhdrsize;
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvhdrsize,
+ dd->ipath_rcvhdrsize);
+ ipath_cdbg(VERBOSE, "Set protocol header size to %u\n",
+ dd->ipath_rcvhdrsize);
+ }
+ return ret;
+}
+
+/**
+ * ipath_getpiobuf - find an available pio buffer
+ * @dd: the infinipath device
+ * @pbufnum: the buffer number is placed here
+ *
+ * do appropriate marking as busy, etc.
+ * returns buffer number if one found (>=0), negative number is error.
+ * Used by ipath_sma_send_pkt and ipath_layer_send
+ */
+u32 __iomem *ipath_getpiobuf(struct ipath_devdata *dd, u32 * pbufnum)
+{
+ int i, j, starti, updated = 0;
+ unsigned piobcnt, iter;
+ unsigned long flags;
+ unsigned long *shadow = dd->ipath_pioavailshadow;
+ u32 __iomem *buf;
+
+ piobcnt = (unsigned)(dd->ipath_piobcnt2k
+ + dd->ipath_piobcnt4k);
+ starti = dd->ipath_lastport_piobuf;
+ iter = piobcnt - starti;
+ if (dd->ipath_upd_pio_shadow) {
+ /*
+ * Minor optimization. If we had no buffers on last call,
+ * start out by doing the update; continue and do scan even
+ * if no buffers were updated, to be paranoid
+ */
+ ipath_update_pio_bufs(dd);
+ /* we scanned here, don't do it at end of scan */
+ updated = 1;
+ i = starti;
+ } else
+ i = dd->ipath_lastpioindex;
+
+rescan:
+ /*
+ * while test_and_set_bit() is atomic, we do that and then the
+ * change_bit(), and the pair is not. See if this is the cause
+ * of the remaining armlaunch errors.
+ */
+ spin_lock_irqsave(&ipath_pioavail_lock, flags);
+ for (j = 0; j < iter; j++, i++) {
+ if (i >= piobcnt)
+ i = starti;
+ /*
+ * To avoid bus lock overhead, we first find a candidate
+ * buffer, then do the test and set, and continue if that
+ * fails.
+ */
+ if (test_bit((2 * i) + 1, shadow) ||
+ test_and_set_bit((2 * i) + 1, shadow))
+ continue;
+ /* flip generation bit */
+ change_bit(2 * i, shadow);
+ break;
+ }
+ spin_unlock_irqrestore(&ipath_pioavail_lock, flags);
+
+ if (j == iter) {
+ volatile unsigned long long *dma =
+ (volatile unsigned long long *)
+ dd->ipath_pioavailregs_dma;
+
+ /*
+ * first time through; shadow exhausted, but may be real
+ * buffers available, so go see; if any updated, rescan
+ * (once)
+ */
+ if (!updated) {
+ ipath_update_pio_bufs(dd);
+ updated = 1;
+ i = starti;
+ goto rescan;
+ }
+ dd->ipath_upd_pio_shadow = 1;
+ /*
+ * not atomic, but if we lose one once in a while, that's OK
+ */
+ ipath_stats.sps_nopiobufs++;
+ if (!(++dd->ipath_consec_nopiobuf % 100000)) {
+ ipath_dbg("%u pio sends with no bufavail; dmacopy: "
+ "%llx %llx %llx %llx; shadow: "
+ "%lx %lx %lx %lx\n",
+ dd->ipath_consec_nopiobuf,
+ (unsigned long long) __le64_to_cpu(dma[0]),
+ (unsigned long long) __le64_to_cpu(dma[1]),
+ (unsigned long long) __le64_to_cpu(dma[2]),
+ (unsigned long long) __le64_to_cpu(dma[3]),
+ shadow[0], shadow[1], shadow[2],
+ shadow[3]);
+ /*
+ * 4 buffers per byte, 4 registers above, cover rest
+ * below
+ */
+ if ((dd->ipath_piobcnt2k + dd->ipath_piobcnt4k) >
+ (sizeof(shadow[0]) * 4 * 4))
+ ipath_dbg("2nd group: dmacopy: %llx %llx "
+ "%llx %llx; shadow: %lx %lx "
+ "%lx %lx\n",
+ (unsigned long long) __le64_to_cpu(dma[4]),
+ (unsigned long long) __le64_to_cpu(dma[5]),
+ (unsigned long long) __le64_to_cpu(dma[6]),
+ (unsigned long long) __le64_to_cpu(dma[7]),
+ shadow[4], shadow[5],
+ shadow[6], shadow[7]);
+ }
+ return NULL;
+ }
+
+ if (updated && dd->ipath_layer.l_intr) {
+ /*
+ * ran out of bufs, now some (at least this one we just
+ * got) are now available, so tell the layered driver.
+ */
+ dd->ipath_layer.l_intr(dd->ipath_unit,
+ IPATH_LAYER_INT_SEND_CONTINUE);
+ }
+
+ /*
+ * set next starting place. Since it's just an optimization,
+ * it doesn't matter who wins on this, so no locking
+ */
+ dd->ipath_lastpioindex = i + 1;
+ if (dd->ipath_upd_pio_shadow)
+ dd->ipath_upd_pio_shadow = 0;
+ if (dd->ipath_consec_nopiobuf)
+ dd->ipath_consec_nopiobuf = 0;
+ if (i < dd->ipath_piobcnt2k)
+ buf = (u32 __iomem *)
+ (dd->ipath_pio2kbase + i * dd->ipath_palign);
+ else
+ buf = (u32 __iomem *)
+ (dd->ipath_pio4kbase + (i - dd->ipath_piobcnt2k) *
+ dd->ipath_4kalign);
+ ipath_cdbg(VERBOSE, "Return piobuf%u %uk @ %p\n",
+ i, (i < dd->ipath_piobcnt2k) ? 2 : 4, buf);
+ if (pbufnum)
+ *pbufnum = i;
+ return buf;
+}
+
+/**
+ * ipath_create_rcvhdrq - create a receive header queue
+ * @dd: the infinipath device
+ * @pd: the port data
+ *
+ * this *must* be physically contiguous memory, and for now,
+ * that limits it to what kmalloc can do.
+ */
+int ipath_create_rcvhdrq(struct ipath_devdata *dd,
+ struct ipath_portdata *pd)
+{
+ int ret = 0, amt;
+
+ amt = ALIGN(dd->ipath_rcvhdrcnt * dd->ipath_rcvhdrentsize *
+ sizeof(u32), PAGE_SIZE);
+ if (!pd->port_rcvhdrq) {
+ size_t i;
+
+ /*
+ * not using REPEAT isn't viable; at 128KB, we can
+ * easily fail this. The problem with REPEAT is we
+ * can block here "forever". There isn't an
+ * inbetween, unfortunately. We could reduce the risk
+ * by never freeing the rcvhdrq except at unload, but
+ * even then, the first time a port is used, we could
+ * delay for some time...
+ */
+ pd->port_rcvhdrq =
+ dma_alloc_coherent(&dd->pcidev->dev, amt,
+ &pd->port_rcvhdrq_phys,
+ GFP_USER);
+ if (!pd->port_rcvhdrq) {
+ ipath_dev_err(dd,
+ "attempt to allocate %d bytes for "
+ "port %u rcvhdrq failed\n",
+ amt, pd->port_port);
+ ret = -ENOMEM;
+ goto bail;
+ }
+
+ pd->port_rcvhdrq_size = amt;
+
+ ipath_cdbg(VERBOSE, "%d pages at %p (phys %lx) size=%lu "
+ "for port %u rcvhdr Q\n",
+ amt >> PAGE_SHIFT, pd->port_rcvhdrq,
+ (unsigned long) pd->port_rcvhdrq_phys,
+ (unsigned long) pd->port_rcvhdrq_size,
+ pd->port_port);
+
+ /*
+ * mark pages as reserved, to avoid problems when user
+ * process with them mapped exits.
+ */
+ for (i = 0; i < amt; i += PAGE_SIZE)
+ SetPageReserved(virt_to_page(pd->port_rcvhdrq + i));
+ } else {
+ /*
+ * clear for security, sanity, and/or debugging, each
+ * time we reuse
+ */
+ memset(pd->port_rcvhdrq, 0, amt);
+ }
+
+ /*
+ * tell chip each time we init it, even if we are re-using previous
+ * memory (we zero it at process close)
+ */
+ ipath_cdbg(VERBOSE, "writing port %d rcvhdraddr as %lx\n",
+ pd->port_port, (unsigned long) pd->port_rcvhdrq_phys);
+ ipath_write_kreg_port(dd, dd->ipath_kregs->kr_rcvhdraddr,
+ pd->port_port, pd->port_rcvhdrq_phys);
+
+ ret = 0;
+bail:
+ return ret;
+}
+
+int ipath_waitfor_complete(struct ipath_devdata *dd, ipath_kreg reg_id,
+ u64 bits_to_wait_for, u64 * valp)
+{
+ u64 timeout, lastval, val;
+
+ lastval = ipath_read_kreg64(dd, reg_id);
+ /* wait a ridiculously long time */
+ timeout = get_cycles() + 0x10000000ULL;
+ do {
+ val = ipath_read_kreg64(dd, reg_id);
+ /* set so they have something, even on failures. */
+ *valp = val;
+ if ((val & bits_to_wait_for) == bits_to_wait_for)
+ return 0;
+ if (val != lastval)
+ ipath_cdbg(VERBOSE, "Changed from %llx to %llx, "
+ "waiting for %llx bits\n",
+ (unsigned long long) lastval,
+ (unsigned long long) val,
+ (unsigned long long) bits_to_wait_for);
+ yield();
+ if (get_cycles() > timeout) {
+ ipath_dbg("Didn't get bits %llx in register 0x%x, "
+ "got %llx\n",
+ (unsigned long long) bits_to_wait_for,
+ reg_id, (unsigned long long) *valp);
+ return ENODEV;
+ }
+ } while (1);
+}
+
+/**
+ * ipath_waitfor_mdio_cmdready - wait for last command to complete
+ * @dd: the infinipath device
+ *
+ * Like ipath_waitfor_complete(), but we wait for the CMDVALID bit to go
+ * away indicating the last command has completed. It doesn't return data
+ */
+int ipath_waitfor_mdio_cmdready(struct ipath_devdata *dd)
+{
+ u64 timeout;
+ u64 val;
+
+ /* wait a ridiculously long time */
+ timeout = get_cycles() + 0x10000000ULL;
+ do {
+ val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_mdio);
+ if (!(val & IPATH_MDIO_CMDVALID))
+ return 0;
+ yield();
+ if (get_cycles() > timeout) {
+ ipath_dbg("CMDVALID stuck in mdio reg? (%llx)\n",
+ (unsigned long long) val);
+ return ENODEV;
+ }
+ } while (1);
+}
+
+void ipath_set_ib_lstate(struct ipath_devdata *dd, int which)
+{
+#if _IPATH_DEBUGGING
+ static char *what[4] = {
+ [0] = "DOWN",
+ [INFINIPATH_IBCC_LINKCMD_INIT] = "INIT",
+ [INFINIPATH_IBCC_LINKCMD_ARMED] = "ARMED",
+ [INFINIPATH_IBCC_LINKCMD_ACTIVE] = "ACTIVE"
+ };
+ ipath_cdbg(SMA, "Trying to move unit %u to %s, current ltstate "
+ "is %s\n", dd->ipath_unit,
+ what[(which >> INFINIPATH_IBCC_LINKCMD_SHIFT) &
+ INFINIPATH_IBCC_LINKCMD_MASK],
+ ipath_ibcstatus_str[
+ (ipath_read_kreg64
+ (dd, dd->ipath_kregs->kr_ibcstatus) >>
+ INFINIPATH_IBCS_LINKTRAININGSTATE_SHIFT) &
+ INFINIPATH_IBCS_LINKTRAININGSTATE_MASK]);
+#endif
+
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_ibcctrl,
+ dd->ipath_ibcctrl | which);
+}
+
+/**
+ * ipath_read_kreg64_port - read a device's per-port 64-bit kernel register
+ * @dd: the infinipath device
+ * @regno: the register number to read
+ * @port: the port containing the register
+ *
+ * Registers that vary with the chip implementation constants (port)
+ * use this routine.
+ */
+u64 ipath_read_kreg64_port(const struct ipath_devdata *dd, ipath_kreg regno,
+ unsigned port)
+{
+ u16 where;
+
+ if (port < dd->ipath_portcnt &&
+ (regno == dd->ipath_kregs->kr_rcvhdraddr ||
+ regno == dd->ipath_kregs->kr_rcvhdrtailaddr))
+ where = regno + port;
+ else
+ where = -1;
+
+ return ipath_read_kreg64(dd, where);
+}
+
+/**
+ * ipath_write_kreg_port - write a device's per-port 64-bit kernel register
+ * @dd: the infinipath device
+ * @regno: the register number to write
+ * @port: the port containing the register
+ * @value: the value to write
+ *
+ * Registers that vary with the chip implementation constants (port)
+ * use this routine.
+ */
+void ipath_write_kreg_port(const struct ipath_devdata *dd, ipath_kreg regno,
+ unsigned port, u64 value)
+{
+ u16 where;
+
+ if (port < dd->ipath_portcnt &&
+ (regno == dd->ipath_kregs->kr_rcvhdraddr ||
+ regno == dd->ipath_kregs->kr_rcvhdrtailaddr))
+ where = regno + port;
+ else
+ where = -1;
+
+ ipath_write_kreg(dd, where, value);
+}
+
+/**
+ * ipath_shutdown_link - shut down a link
+ * @dd: the infinipath device
+ *
+ * do this when driver is being unloaded, or perhaps for diags, and
+ * maybe when we get an interrupt of a fatal link error that requires
+ * bringing the linkd down and back up
+ */
+static int ipath_shutdown_link(struct ipath_devdata *dd)
+{
+ int ret = 0;
+
+ ipath_dbg("Shutting down the link\n");
+ ipath_set_ib_lstate(dd, INFINIPATH_IBCC_LINKINITCMD_DISABLE <<
+ INFINIPATH_IBCC_LINKINITCMD_SHIFT);
+
+ /*
+ * we are shutting down, so tell the layered driver. We don't do
+ * this on just a link state change, much like ethernet, a cable
+ * unplug, etc. doesn't change driver state
+ */
+ if (dd->ipath_layer.l_intr)
+ dd->ipath_layer.l_intr(dd->ipath_unit,
+ IPATH_LAYER_INT_IF_DOWN);
+
+ /* disable IBC */
+ dd->ipath_control &= ~INFINIPATH_C_LINKENABLE;
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_control,
+ dd->ipath_control);
+
+ dd->ipath_flags |= IPATH_LINKUNK;
+ dd->ipath_flags &= ~(IPATH_INITTED | IPATH_LINKDOWN |
+ IPATH_LINKINIT | IPATH_LINKARMED |
+ IPATH_LINKACTIVE);
+ *dd->ipath_statusp &= ~(IPATH_STATUS_IB_CONF |
+ IPATH_STATUS_IB_READY);
+
+ /*
+ * clear SerdesEnable and turn the leds off; do this here because
+ * we are unloading, so don't count on interrupts to move along
+ * Turn the LEDs off explictly for the same reason.
+ */
+ dd->ipath_f_quiet_serdes(dd);
+ dd->ipath_f_setextled(dd, 0, 0);
+
+ if (dd->ipath_stats_timer_active) {
+ del_timer_sync(&dd->ipath_stats_timer);
+ dd->ipath_stats_timer_active = 0;
+ }
+ if (*dd->ipath_statusp & IPATH_STATUS_CHIP_PRESENT) {
+ /* can't do anything more with chip; needs re-init */
+ *dd->ipath_statusp &= ~IPATH_STATUS_CHIP_PRESENT;
+ if (dd->ipath_kregbase) {
+ /*
+ * if we haven't already cleaned up before these are
+ * to ensure any register reads/writes "fail" until
+ * re-init
+ */
+ dd->ipath_kregbase = NULL;
+ dd->ipath_kregvirt = NULL;
+ dd->ipath_uregbase = 0;
+ dd->ipath_sregbase = 0;
+ dd->ipath_cregbase = 0;
+ dd->ipath_kregsize = 0;
+ }
+ ipath_disable_wc(dd);
+ }
+
+ return ret;
+}
+
+/**
+ * ipath_free_pddata - free a port's allocated data
+ * @dd: the infinipath device
+ * @port: the port
+ * @freehdrq: free the port data structure if true
+ *
+ * when closing, free up any allocated data for a port, if the
+ * reference count goes to zero
+ * Note: this also optionally frees the portdata itself!
+ * Any changes here have to be matched up with the reinit case
+ * of ipath_init_chip(), which calls this routine on reinit after reset.
+ */
+void ipath_free_pddata(struct ipath_devdata *dd, u32 port, int freehdrq)
+{
+ struct ipath_portdata *pd = dd->ipath_pd[port];
+
+ if (!pd)
+ return;
+ if (freehdrq)
+ /*
+ * only clear and free portdata if we are going to also
+ * release the hdrq, otherwise we leak the hdrq on each
+ * open/close cycle
+ */
+ dd->ipath_pd[port] = NULL;
+ if (freehdrq && pd->port_rcvhdrq) {
+ size_t i;
+ ipath_cdbg(VERBOSE, "free closed port %d rcvhdrq @ %p "
+ "(size=%lu)\n", pd->port_port, pd->port_rcvhdrq,
+ (unsigned long) pd->port_rcvhdrq_size);
+ for (i = 0; i < pd->port_rcvhdrq_size; i += PAGE_SIZE)
+ ClearPageReserved(
+ virt_to_page(pd->port_rcvhdrq + i));
+ dma_free_coherent(&dd->pcidev->dev, pd->port_rcvhdrq_size,
+ pd->port_rcvhdrq, pd->port_rcvhdrq_phys);
+ pd->port_rcvhdrq = NULL;
+ }
+ if (port && pd->port_rcvegrbuf) {
+ /* always free this */
+ if (pd->port_rcvegrbuf) {
+ unsigned e;
+
+ for (e = 0; e < pd->port_rcvegrbuf_chunks; e++) {
+ void *buf = pd->port_rcvegrbuf[e];
+ size_t i;
+
+ for (i = 0; i < pd->port_rcvegrbuf_size;
+ i += PAGE_SIZE)
+ ClearPageReserved(
+ virt_to_page(buf + i));
+
+ ipath_cdbg(VERBOSE, "egrbuf free(%p, %lu), "
+ "chunk %u/%u\n", buf,
+ (unsigned long)
+ pd->port_rcvegrbuf_size,
+ e, pd->port_rcvegrbuf_chunks);
+ dma_free_coherent(
+ &dd->pcidev->dev,
+ pd->port_rcvegrbuf_size, buf,
+ pd->port_rcvegrbuf_phys[e]);
+ }
+ vfree(pd->port_rcvegrbuf);
+ pd->port_rcvegrbuf = NULL;
+ vfree(pd->port_rcvegrbuf_phys);
+ pd->port_rcvegrbuf_phys = NULL;
+ }
+ pd->port_rcvegrbuf_chunks = 0;
+ } else if (port == 0 && dd->ipath_port0_skbs) {
+ unsigned e;
+ struct sk_buff **skbs = dd->ipath_port0_skbs;
+
+ dd->ipath_port0_skbs = NULL;
+ ipath_cdbg(VERBOSE, "free closed port %d ipath_port0_skbs "
+ "@ %p\n", pd->port_port, skbs);
+ for (e = 0; e < dd->ipath_rcvegrcnt; e++)
+ if (skbs[e])
+ dev_kfree_skb(skbs[e]);
+ vfree(skbs);
+ }
+ if (freehdrq) {
+ kfree(pd->port_tid_pg_list);
+ kfree(pd);
+ }
+}
+
+int __init infinipath_init(void)
+{
+ int ret;
+
+ ipath_dbg(KERN_INFO DRIVER_LOAD_MSG "%s", ipath_core_version);
+
+ /*
+ * These must all be called before the driver is registered
+ * with the PCI subsystem.
+ */
+ spin_lock_init(&ipath_pioavail_lock);
+ spin_lock_init(&ipath_sma_lock);
+
+ spin_lock_init(&unit_table_lock);
+ idr_init(&unit_table);
+ if (!idr_pre_get(&unit_table, GFP_KERNEL)) {
+ ret = -ENOMEM;
+ goto bail;
+ }
+
+ ret = pci_register_driver(&ipath_driver);
+ if (ret < 0) {
+ printk(KERN_ERR IPATH_DRV_NAME
+ ": Unable to register driver: error %d\n", -ret);
+ goto bail_unit;
+ }
+
+ ret = ipath_driver_create_group(&ipath_driver.driver);
+ if (ret < 0) {
+ printk(KERN_ERR IPATH_DRV_NAME ": Unable to create driver "
+ "sysfs entries: error %d\n", -ret);
+ goto bail_pci;
+ }
+
+ goto bail;
+
+bail_pci:
+ pci_unregister_driver(&ipath_driver);
+
+bail_unit:
+ idr_destroy(&unit_table);
+
+bail:
+ return ret;
+}
+
+static void cleanup_device(struct ipath_devdata *dd)
+{
+ int port;
+ u64 val;
+
+ /* in case unload fails, be consistent */
+ dd->ipath_rcvctrl = 0;
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl,
+ dd->ipath_rcvctrl);
+
+ /*
+ * gracefully stop all sends allowing any in progress to
+ * trickle out first.
+ */
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, 0ULL);
+ /* flush it */
+ val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch);
+ /*
+ * enough for anything that's going to trickle out to have
+ * actually done so.
+ */
+ udelay(5);
+
+ /*
+ * abort any armed or launched PIO buffers that didn't go. (self
+ * clearing). Will cause any packet currently being transmitted to
+ * go out with an EBP, and may also cause a short packet error on
+ * the receiver.
+ */
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl,
+ INFINIPATH_S_ABORT);
+
+ /* mask interrupts, but not errors */
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_intmask, 0ULL);
+ ipath_shutdown_link(dd);
+
+ /*
+ * clear all interrupts and errors. Next time driver is loaded,
+ * we know that whatever is set happened while we were unloaded
+ */
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrclear, -1LL);
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_errorclear, -1LL);
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_intclear, -1LL);
+ if (dd->__ipath_pioavailregs_base) {
+ pci_free_consistent(dd->pcidev,
+ dd->ipath_pioavailregs_size,
+ (void *)dd->__ipath_pioavailregs_base,
+ dd->ipath_pioavailregs_phys);
+ dd->__ipath_pioavailregs_base = NULL;
+ dd->ipath_pioavailregs_dma = NULL;
+ }
+
+ if (dd->ipath_pageshadow) {
+ struct page **tmpp = dd->ipath_pageshadow;
+ int i, cnt = 0;
+
+ ipath_cdbg(VERBOSE, "Unlocking any expTID pages still "
+ "locked\n");
+ for (port = 0; port < dd->ipath_cfgports; port++) {
+ int port_tidbase = port * dd->ipath_rcvtidcnt;
+ int maxtid = port_tidbase + dd->ipath_rcvtidcnt;
+ for (i = port_tidbase; i < maxtid; i++) {
+ if (tmpp[i]) {
+ ipath_release_user_pages(&tmpp[i], 1);
+ tmpp[i] = NULL;
+ cnt++;
+ }
+ }
+ }
+ if (cnt) {
+ ipath_stats.sps_pageunlocks += cnt;
+ ipath_cdbg(VERBOSE, "There were still %u expTID "
+ "entries locked\n", cnt);
+ }
+ if (ipath_stats.sps_pagelocks ||
+ ipath_stats.sps_pageunlocks)
+ ipath_cdbg(
+ VERBOSE, "%llu pages locked, %llu "
+ "unlocked via ipath_m{un}lock\n",
+ (unsigned long long)
+ ipath_stats.sps_pagelocks,
+ (unsigned long long)
+ ipath_stats.sps_pageunlocks);
+
+ ipath_cdbg(VERBOSE, "Free shadow page tid array at %p\n",
+ dd->ipath_pageshadow);
+ vfree(dd->ipath_pageshadow);
+ dd->ipath_pageshadow = NULL;
+ }
+
+ /*
+ * free any resources still in use (usually just kernel ports)
+ * at unload
+ */
+ for (port = 0; port < dd->ipath_cfgports; port++)
+ ipath_free_pddata(dd, port, 1);
+ kfree(dd->ipath_pd);
+ /*
+ * debuggability, in case some cleanup path tries to use it
+ * after this
+ */
+ dd->ipath_pd = NULL;
+}
+
+static void __exit infinipath_cleanup(void)
+{
+ int m;
+
+ ipath_driver_remove_group(&ipath_driver.driver);
+
+ /*
+ * turn off rcv, send, and interrupts for all ports, all drivers
+ * should also hard reset the chip here?
+ * free up port 0 (kernel) rcvhdr, egr bufs, and eventually tid bufs
+ * for all versions of the driver, if they were allocated
+ */
+ for (m = 0; m < atomic_read(&ipath_max); m++) {
+ struct ipath_devdata *dd = ipath_lookup(m);
+ if (!dd)
+ continue;
+
+ if (dd->ipath_kregbase)
+ cleanup_device(dd);
+
+ if (dd->pcidev) {
+ if (dd->pcidev->irq) {
+ ipath_cdbg(VERBOSE,
+ "unit %u free_irq of irq %x\n",
+ m, dd->pcidev->irq);
+ free_irq(dd->pcidev->irq, dd);
+ } else
+ ipath_dbg("irq is 0, not doing free_irq "
+ "for unit %u\n", m);
+ dd->pcidev = NULL;
+ }
+
+ /*
+ * we check for NULL here, because it's outside the kregbase
+ * check, and we need to call it after the free_irq. Thus
+ * it's possible that the function pointers were never
+ * initialized.
+ */
+ if (dd->ipath_f_cleanup)
+ /* clean up chip-specific stuff */
+ dd->ipath_f_cleanup(dd);
+ }
+
+ ipath_cdbg(VERBOSE, "Unregistering pci driver unit %u\n", m);
+ pci_unregister_driver(&ipath_driver);
+
+ idr_destroy(&unit_table);
+}
+
+/**
+ * ipath_reset_device - reset the chip if possible
+ * @unit: the device to reset
+ *
+ * Whether or not reset is successful, we attempt to re-initialize the chip
+ * (that is, much like a driver unload/reload). We clear the INITTED flag
+ * so that the various entry points will fail until we reinitialize. For
+ * now, we only allow this if no user ports are open that use chip resources
+ */
+int ipath_reset_device(int unit)
+{
+ int ret, i;
+ struct ipath_devdata *dd = ipath_lookup(unit);
+
+ if (!dd)
+ return -ENODEV;
+
+ dev_info(&dd->pcidev->dev, "Reset on unit %u requested\n", unit);
+
+ if (!dd->ipath_kregbase || !(dd->ipath_flags & IPATH_PRESENT)) {
+ dev_info(&dd->pcidev->dev, "Invalid unit number %u or "
+ "not initialized or not present\n", unit);
+ return -ENXIO;
+ }
+
+ if (dd->ipath_pd)
+ for (i = 1; i < dd->ipath_portcnt; i++) {
+ if (dd->ipath_pd[i] && dd->ipath_pd[i]->port_cnt) {
+ ipath_dbg("unit %u port %d is in use "
+ "(PID %u cmd %s), can't reset\n",
+ unit, i,
+ dd->ipath_pd[i]->port_pid,
+ dd->ipath_pd[i]->port_comm);
+ return -EBUSY;
+ }
+ }
+
+ dd->ipath_flags &= ~IPATH_INITTED;
+ ret = dd->ipath_f_reset(dd);
+ if (ret != 1)
+ ipath_dbg("reset was not successful\n");
+ ipath_dbg("Trying to reinitialize unit %u after reset attempt\n",
+ unit);
+ ret = ipath_init_chip(dd, 1);
+ if (ret)
+ dev_err(&dd->pcidev->dev, "Reinitialize unit %u after "
+ "reset failed with %d\n", unit, ret);
+ else
+ dev_info(&dd->pcidev->dev, "Reinitialized unit %u after "
+ "resetting\n", unit);
+ return ret;
+}
+
+module_init(infinipath_init);
+module_exit(infinipath_cleanup);
^ permalink raw reply [flat|nested] 70+ messages in thread* [PATCH 3 of 20] ipath - copy and send routines for sending an skb
2006-03-10 0:35 [PATCH 0 of 20] [RFC] ipath driver - another round for review Bryan O'Sullivan
2006-03-10 0:35 ` [PATCH 1 of 20] ipath - core driver header files Bryan O'Sullivan
2006-03-10 0:35 ` [PATCH 2 of 20] ipath - core device driver Bryan O'Sullivan
@ 2006-03-10 0:35 ` Bryan O'Sullivan
2006-03-10 0:35 ` [PATCH 4 of 20] ipath - support for HyperTransport devices Bryan O'Sullivan
` (17 subsequent siblings)
20 siblings, 0 replies; 70+ messages in thread
From: Bryan O'Sullivan @ 2006-03-10 0:35 UTC (permalink / raw)
To: rolandd, gregkh, akpm, davem; +Cc: linux-kernel, openib-general
Signed-off-by: Bryan O'Sullivan <bos@pathscale.com>
diff -r 19bdf20bc544 -r 227b3e7c27ce drivers/infiniband/hw/ipath/ipath_copy.c
--- /dev/null Thu Jan 1 00:00:00 1970 +0000
+++ b/drivers/infiniband/hw/ipath/ipath_copy.c Thu Mar 9 16:15:23 2006 -0800
@@ -0,0 +1,504 @@
+/*
+ * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+/*
+ * This file provides support for doing sk_buff buffer swapping between
+ * the low level driver eager buffers, and the network layer. It's part
+ * of the core driver, rather than the ether driver, because it relies
+ * on variables and functions in the core driver. It exports a single
+ * entry point for use in the ipath_ether module.
+ */
+
+#include <linux/io.h>
+#include <linux/pci.h>
+#include <linux/netdevice.h>
+
+#include "ipath_kernel.h"
+#include "ips_common.h"
+
+/**
+ * layer_send_getpiobuf - allocate, setup and copy out a PIO send buffer
+ * @dd: the infinipath device
+ * @cdp: the data to copy
+ *
+ * Allocate a PIO send buffer, initialize the header and copy it out.
+ */
+static int layer_send_getpiobuf(struct ipath_devdata *dd,
+ struct copy_data_s *cdp)
+{
+ u32 extra_bytes;
+ u32 len, nwords, hdrwords;
+ u32 __iomem *piobuf;
+
+ piobuf = ipath_getpiobuf(dd, NULL);
+ if (!piobuf) {
+ cdp->error = -EBUSY;
+ return cdp->error;
+ }
+
+ /*
+ * Compute the max amount of data that can fit into a PIO buffer.
+ * buffer size - header size - trigger qword length & flags - CRC
+ */
+ len = dd->ipath_ibmaxlen -
+ sizeof(struct ether_header) - 8 - (SIZE_OF_CRC << 2);
+ if (len > dd->ipath_rcvegrbufsize)
+ len = dd->ipath_rcvegrbufsize;
+ if (len > (cdp->len + cdp->extra))
+ len = (cdp->len + cdp->extra);
+ /* Compute word aligment (i.e., (len & 3) ? 4 - (len & 3) : 0) */
+ extra_bytes = (4 - len) & 3;
+ nwords = (sizeof(struct ether_header) + len + extra_bytes) >> 2;
+ cdp->hdr->lrh[2] = htons(nwords + SIZE_OF_CRC);
+ cdp->hdr->bth[0] = htonl((OPCODE_ITH4X << 24) +
+ (extra_bytes << 20) +
+ IPS_DEFAULT_P_KEY);
+ cdp->hdr->sub_opcode = OPCODE_ENCAP;
+
+ cdp->hdr->bth[2] = 0;
+ /*
+ * Generate an interrupt on the receive side for the last
+ * fragment.
+ */
+ cdp->hdr->iph.pkt_flags = ((cdp->len + cdp->extra) == len)
+ ? INFINIPATH_KPF_INTR : 0;
+ cdp->hdr->iph.chksum =
+ (u16) IPS_LRH_BTH + (u16) (nwords + SIZE_OF_CRC) -
+ (u16) ((cdp->hdr->iph.ver_port_tid_offset >> 16) & 0xFFFF) -
+ (u16) (cdp->hdr->iph.ver_port_tid_offset & 0xFFFF) -
+ (u16) cdp->hdr->iph.pkt_flags;
+
+ ipath_cdbg(VERBOSE, "send %d (%x %x %x %x %x %x %x)\n", nwords,
+ cdp->hdr->lrh[0], cdp->hdr->lrh[1],
+ cdp->hdr->lrh[2], cdp->hdr->lrh[3],
+ cdp->hdr->bth[0], cdp->hdr->bth[1], cdp->hdr->bth[2]);
+ /*
+ * Write len to control qword, no flags.
+ * +1 is for the qword padding of pbc.
+ */
+ writeq(nwords + 1ULL, (u64 __iomem *) piobuf);
+ /* we have to flush after the PBC for correctness on some cpus
+ * or WC buffer can be written out of order */
+ ipath_flush_wc();
+ piobuf += 2;
+ hdrwords = sizeof(struct ether_header) >> 2;
+ __iowrite32_copy(piobuf, cdp->hdr, hdrwords);
+ cdp->csum_pio = &((struct ether_header __iomem *)piobuf)->csum;
+ cdp->to = piobuf + hdrwords;
+ cdp->flen = nwords - hdrwords;
+ cdp->hdr->frag_num++;
+ return 0;
+}
+
+/**
+ * copy_extra_dword - copy the last full dword
+ * @dd: the infinipath device
+ * @cdp: the data to copy
+ * @dosum: write a checksum if true
+ *
+ * copy the last full dword when that's the "extra" word, preceding it
+ * with a memory fence, so that all prior data is written to the PIO
+ * buffer before the trigger word, to enforce the correct bus ordering
+ * of the WC buffer contents on the bus.
+ */
+static inline unsigned copy_extra_dword(struct ipath_devdata *dd,
+ struct copy_data_s *cdp,
+ unsigned dosum)
+{
+ if (!cdp->flen && layer_send_getpiobuf(dd, cdp) < 0)
+ return 1;
+ /* write the checksum before the last PIO write, if requested. */
+ if (dosum && cdp->flen == 1)
+ __raw_writel(csum_fold(cdp->csum), cdp->csum_pio);
+ cdp->extra = 0;
+ cdp->flen -= 1;
+ if (!cdp->flen) { /* trigger word being written */
+ ipath_flush_wc();
+ __raw_writel(cdp->u.w, cdp->to++);
+ ipath_flush_wc();
+ } else /* still more to copy to pio buf */
+ __raw_writel(cdp->u.w, cdp->to++);
+ return 0;
+}
+
+/**
+ * copy_a_buffer - copy a PIO buffer's worth to the PIO buffer
+ * @dd: the infinipath device
+ * @cdp: the destination
+ * @p: the data to copy
+ * @n: the amount to copy
+ * @dosum: write a checksum if true
+ *
+ * copy a PIO buffer's worth (or the skb fragment, at least) to the PIO
+ * buffer, adding a memory fence before the last word. We need the fence
+ * as part of forcing the WC ordering on some cpus, for the cases where
+ * it will be the trigger word. The final fence after the trigger word
+ * will be done either at the next chunk, or on final return from the caller
+ * Takes max byte count, returns byte count actually done (always rounded
+ * to dword multiple).
+ */
+static u32 copy_a_buffer(struct ipath_devdata *dd, struct copy_data_s *cdp,
+ void *p, u32 n, unsigned dosum)
+{
+ u32 *p32;
+
+ if (!cdp->flen && layer_send_getpiobuf(dd, cdp) < 0)
+ return -1;
+ if (n > cdp->flen)
+ n = cdp->flen;
+ if (dosum && cdp->flen == n)
+ __raw_writel(csum_fold(cdp->csum), cdp->csum_pio);
+ p32 = p;
+ cdp->flen -= n;
+ if (!cdp->flen) { /* trigger word being written */
+ __iowrite32_copy(cdp->to, p32, n - 1);
+ cdp->to += n - 1;
+ ipath_flush_wc();
+ __raw_writel(p32[n - 1], cdp->to++);
+ ipath_flush_wc();
+ } else { /* still more to copy to pio buf */
+ __iowrite32_copy(cdp->to, p32, n);
+ cdp->to += n;
+ }
+ n <<= 2;
+ cdp->offset += n;
+ cdp->len -= n;
+ return n;
+}
+
+static inline int copy_bits_internal(struct ipath_devdata *dd,
+ struct copy_data_s *cdp, u8 *p,
+ unsigned *copyp, unsigned *offsetp,
+ unsigned *lenp, int do_csum)
+{
+ unsigned copy = *copyp;
+ unsigned len = *lenp;
+ int ret = 1;
+
+ if (copy > len)
+ copy = len;
+ *offsetp += copy;
+ len -= copy;
+ if (do_csum && !cdp->checksum_calc) {
+ unsigned int csum2;
+
+ cdp->checksum_calc = 1;
+
+ csum2 = csum_partial(p, copy, 0);
+ cdp->csum = csum_block_add(cdp->csum, csum2, cdp->pos);
+ cdp->pos += copy;
+ }
+ /*
+ * If the alignment buffer is not empty, fill it and write it
+ * out.
+ */
+ if (cdp->extra) {
+ if (cdp->extra == 4) {
+ if (copy_extra_dword(dd, cdp, 1))
+ goto done;
+ }
+ else while (copy != 0) {
+ cdp->u.buf[cdp->extra] = *p++;
+ copy--;
+ cdp->offset++;
+ cdp->len--;
+ if (++cdp->extra == 4) {
+ if (copy_extra_dword(dd, cdp, 1))
+ goto done;
+ break;
+ }
+ }
+ }
+
+ while (copy >= 4) {
+ u32 n = copy_a_buffer(dd, cdp, p, copy >> 2, 1);
+ if (n == -1)
+ goto done;
+ p += n;
+ copy -= n;
+ }
+ /*
+ * Either cdp->extra is zero or copy is zero, which means that
+ * the loop here can't cause the alignment buffer to fill up.
+ */
+ while (copy != 0) {
+ cdp->u.buf[cdp->extra++] = *p++;
+ copy--;
+ cdp->offset++;
+ cdp->len--;
+ }
+
+ if (do_csum)
+ cdp->checksum_calc = 0;
+
+ if (len == 0)
+ goto done;
+
+ ret = 0;
+done:
+ *copyp = copy;
+ *lenp = len;
+ return ret;
+}
+
+/**
+ * copy_and_maybe_csum_bits - copy data into the PIO buffer
+ * @dd: the infinipath device
+ * @skb: the source sk_buff
+ * @offset: the offset within the source
+ * @len: the len of the data to copy
+ * @cdp: the destination
+ * @do_csum: write a checksum if true
+ *
+ * Copy data out of one or a chain of sk_buffs, into the PIO buffer,
+ * generating the checksum as we go if do_csum is non-zero.
+ * Fragment an sk_buff into multiple IB packets if the amount of data
+ * is more than a single eager send.
+ * Offset and len are in bytes.
+ * Note that this function is recursive!
+ */
+static void copy_and_maybe_csum_bits(struct ipath_devdata *dd,
+ const struct sk_buff *skb,
+ unsigned int offset,
+ unsigned int len,
+ struct copy_data_s *cdp,
+ int do_csum)
+{
+ unsigned int start = skb_headlen(skb);
+ unsigned int i, copy;
+
+ /* Copy header. */
+ copy = start - offset;
+ if ((int) copy > 0) {
+ u8 *p = skb->data + offset;
+
+ if (copy_bits_internal(dd, cdp, p, ©, &offset, &len,
+ do_csum))
+ goto done;
+ }
+
+ for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
+ skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
+ unsigned int end;
+
+ end = start + frag->size;
+ copy = end - offset;
+ if ((int) copy > 0) {
+ u8 *vaddr = kmap_skb_frag(frag);
+ u8 *p = vaddr + frag->page_offset + offset - start;
+ int ret;
+
+ ret = copy_bits_internal(dd, cdp, p, ©,
+ &offset, &len, do_csum);
+
+ kunmap_skb_frag(vaddr);
+
+ if (ret)
+ goto done;
+ }
+ start = end;
+ }
+
+ if (skb_shinfo(skb)->frag_list) {
+ struct sk_buff *list = skb_shinfo(skb)->frag_list;
+
+ for (; list; list = list->next) {
+ unsigned int end;
+
+ end = start + list->len;
+ copy = end - offset;
+ if ((int) copy > 0) {
+ if (copy > len)
+ copy = len;
+ copy_and_maybe_csum_bits(dd, list,
+ offset - start,
+ copy, cdp,
+ do_csum);
+ len -= copy;
+ if (cdp->error || len == 0)
+ goto done;
+ offset += copy;
+ }
+ start = end;
+ }
+ }
+ if (len)
+ cdp->error = -EFAULT;
+done:
+ /* we have to flush after trigger word for correctness on some
+ * cpus or WC buffer can be written out of order; needed even
+ * if there was an error */
+ ipath_flush_wc();
+}
+
+static inline void copy_and_csum_bits(struct ipath_devdata *dd,
+ const struct sk_buff *skb,
+ unsigned int offset,
+ unsigned int len,
+ struct copy_data_s *cdp)
+{
+ copy_and_maybe_csum_bits(dd, skb, offset, len, cdp, 1);
+}
+
+static inline void copy_bits(struct ipath_devdata *dd,
+ const struct sk_buff *skb,
+ unsigned int offset,
+ unsigned int len,
+ struct copy_data_s *cdp)
+{
+ copy_and_maybe_csum_bits(dd, skb, offset, len, cdp, 0);
+}
+
+/**
+ * ipath_layer_send_skb - layered sk_buff send
+ * @dd: the infinipath device
+ * @cdata: the data to send
+ *
+ * This is called by the ipath_ether module.
+ *
+ * Note that the header should have the unchanging parts
+ * initialized but the rest of the header is computed as needed in
+ * order to break up skb data buffers larger than the hardware MTU.
+ * In other words, the Linux network stack MTU can be larger than the
+ * hardware MTU.
+ */
+int ipath_layer_send_skb(struct ipath_devdata *dd,
+ struct copy_data_s *cdata)
+{
+ int ret = 0;
+ u16 vlsllnh;
+
+ if (!(dd->ipath_flags & IPATH_RCVHDRSZ_SET)) {
+ dev_info(&dd->pcidev->dev, "send while not open\n");
+ ret = -EINVAL;
+ }
+ else if ((dd->ipath_flags & (IPATH_LINKUNK | IPATH_LINKDOWN)) ||
+ dd->ipath_lid == 0) {
+ /* lid check is for when sma hasn't yet configured */
+ ret = -ENETDOWN;
+ ipath_cdbg(VERBOSE, "send while not ready, mylid=%u, "
+ "flags=0x%x\n", dd->ipath_lid, dd->ipath_flags);
+ }
+ vlsllnh = *((u16 *) cdata->hdr);
+ if (vlsllnh != htons(IPS_LRH_BTH)) {
+ ipath_dbg("Warning: lrh[0] wrong (%x, not %x); "
+ "not sending\n", vlsllnh, htons(IPS_LRH_BTH));
+ ret = -EINVAL;
+ }
+ if (ret)
+ goto done;
+
+ cdata->error = 0; /* clear last calls error */
+
+ if (cdata->skb->ip_summed == CHECKSUM_HW) {
+ unsigned int csstart = cdata->skb->h.raw - cdata->skb->data;
+
+ /*
+ * Computing the checksum is a bit tricky since if we
+ * fragment the packet, the fragment that should contain the
+ * checksum will have already been sent. The solution is to
+ * store the checksum in the header of the last fragment
+ * just before we write the last data word which triggers
+ * the last fragment to be sent. The receiver will check
+ * the header "tag" field, see that there is a checksum, and
+ * store the checksum back into the packet.
+ *
+ * Save the offset of the two byte checksum.
+ *
+ * Note that we have to add 2 to account for the two bytes
+ * of the ethernet address we stripped from the packet and
+ * put in the header.
+ */
+
+ cdata->hdr->csum_offset = csstart + cdata->skb->csum + 2;
+
+ if (cdata->offset < csstart)
+ copy_bits(dd, cdata->skb, cdata->offset,
+ csstart - cdata->offset, cdata);
+
+ if (cdata->error) {
+ ret = cdata->error;
+ goto done;
+ }
+
+ if (cdata->offset < cdata->skb->len)
+ copy_and_csum_bits(dd, cdata->skb, cdata->offset,
+ cdata->skb->len - cdata->offset,
+ cdata);
+
+ if (cdata->error) {
+ ret = cdata->error;
+ goto done;
+ }
+
+ if (cdata->extra) {
+ while (cdata->extra < 4)
+ cdata->u.buf[cdata->extra++] = 0;
+ (void)copy_extra_dword(dd, cdata, 1);
+ }
+ } else {
+ copy_bits(dd, cdata->skb, cdata->offset,
+ cdata->skb->len - cdata->offset, cdata);
+
+ if (cdata->error) {
+ ret = cdata->error;
+ goto done;
+ }
+
+ if (cdata->extra) {
+ while (cdata->extra < 4)
+ cdata->u.buf[cdata->extra++] = 0;
+ (void)copy_extra_dword(dd, cdata, 1);
+ }
+ }
+
+ if (cdata->error) {
+ ret = cdata->error;
+ if (cdata->error != -EBUSY)
+ ipath_dev_err(dd, "layer_send copy_bits failed "
+ "with error %d\n", -ret);
+ }
+
+ /* another ether packet sent */
+ ipath_stats.sps_ether_spkts++;
+
+done:
+ /*
+ * we have to flush after trigger word for correctness on
+ * some cpus or WC buffer can be written out of order; needed
+ * even if there was an error
+ */
+ ipath_flush_wc();
+ return ret;
+}
+
+EXPORT_SYMBOL_GPL(ipath_layer_send_skb);
^ permalink raw reply [flat|nested] 70+ messages in thread* [PATCH 4 of 20] ipath - support for HyperTransport devices
2006-03-10 0:35 [PATCH 0 of 20] [RFC] ipath driver - another round for review Bryan O'Sullivan
` (2 preceding siblings ...)
2006-03-10 0:35 ` [PATCH 3 of 20] ipath - copy and send routines for sending an skb Bryan O'Sullivan
@ 2006-03-10 0:35 ` Bryan O'Sullivan
2006-03-10 0:35 ` [PATCH 5 of 20] ipath - support for PCI Express devices Bryan O'Sullivan
` (16 subsequent siblings)
20 siblings, 0 replies; 70+ messages in thread
From: Bryan O'Sullivan @ 2006-03-10 0:35 UTC (permalink / raw)
To: rolandd, gregkh, akpm, davem; +Cc: linux-kernel, openib-general
This file contains HT-specific routines and definitions. It is not
compiled unless the kernel has HyperTransport support.
Signed-off-by: Bryan O'Sullivan <bos@pathscale.com>
diff -r 227b3e7c27ce -r f6fb63439323 drivers/infiniband/hw/ipath/ipath_ht400.c
--- /dev/null Thu Jan 1 00:00:00 1970 +0000
+++ b/drivers/infiniband/hw/ipath/ipath_ht400.c Thu Mar 9 16:15:30 2006 -0800
@@ -0,0 +1,1570 @@
+/*
+ * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+/*
+ * This file contains all of the code that is specific to the InfiniPath
+ * HT-400 chip.
+ */
+
+#include <linux/pci.h>
+#include <linux/delay.h>
+
+#include "ipath_kernel.h"
+#include "ipath_registers.h"
+
+/*
+ * This lists the InfiniPath HT400 registers, in the actual chip layout.
+ * This structure should never be directly accessed.
+ *
+ * The names are in InterCap form because they're taken straight from
+ * the chip specification. Since they're only used in this file, they
+ * don't pollute the rest of the source.
+*/
+
+struct _infinipath_do_not_use_kernel_regs {
+ unsigned long long Revision;
+ unsigned long long Control;
+ unsigned long long PageAlign;
+ unsigned long long PortCnt;
+ unsigned long long DebugPortSelect;
+ unsigned long long DebugPort;
+ unsigned long long SendRegBase;
+ unsigned long long UserRegBase;
+ unsigned long long CounterRegBase;
+ unsigned long long Scratch;
+ unsigned long long ReservedMisc1;
+ unsigned long long InterruptConfig;
+ unsigned long long IntBlocked;
+ unsigned long long IntMask;
+ unsigned long long IntStatus;
+ unsigned long long IntClear;
+ unsigned long long ErrorMask;
+ unsigned long long ErrorStatus;
+ unsigned long long ErrorClear;
+ unsigned long long HwErrMask;
+ unsigned long long HwErrStatus;
+ unsigned long long HwErrClear;
+ unsigned long long HwDiagCtrl;
+ unsigned long long MDIO;
+ unsigned long long IBCStatus;
+ unsigned long long IBCCtrl;
+ unsigned long long ExtStatus;
+ unsigned long long ExtCtrl;
+ unsigned long long GPIOOut;
+ unsigned long long GPIOMask;
+ unsigned long long GPIOStatus;
+ unsigned long long GPIOClear;
+ unsigned long long RcvCtrl;
+ unsigned long long RcvBTHQP;
+ unsigned long long RcvHdrSize;
+ unsigned long long RcvHdrCnt;
+ unsigned long long RcvHdrEntSize;
+ unsigned long long RcvTIDBase;
+ unsigned long long RcvTIDCnt;
+ unsigned long long RcvEgrBase;
+ unsigned long long RcvEgrCnt;
+ unsigned long long RcvBufBase;
+ unsigned long long RcvBufSize;
+ unsigned long long RxIntMemBase;
+ unsigned long long RxIntMemSize;
+ unsigned long long RcvPartitionKey;
+ unsigned long long ReservedRcv[10];
+ unsigned long long SendCtrl;
+ unsigned long long SendPIOBufBase;
+ unsigned long long SendPIOSize;
+ unsigned long long SendPIOBufCnt;
+ unsigned long long SendPIOAvailAddr;
+ unsigned long long TxIntMemBase;
+ unsigned long long TxIntMemSize;
+ unsigned long long ReservedSend[9];
+ unsigned long long SendBufferError;
+ unsigned long long SendBufferErrorCONT1;
+ unsigned long long SendBufferErrorCONT2;
+ unsigned long long SendBufferErrorCONT3;
+ unsigned long long ReservedSBE[4];
+ unsigned long long RcvHdrAddr0;
+ unsigned long long RcvHdrAddr1;
+ unsigned long long RcvHdrAddr2;
+ unsigned long long RcvHdrAddr3;
+ unsigned long long RcvHdrAddr4;
+ unsigned long long RcvHdrAddr5;
+ unsigned long long RcvHdrAddr6;
+ unsigned long long RcvHdrAddr7;
+ unsigned long long RcvHdrAddr8;
+ unsigned long long ReservedRHA[7];
+ unsigned long long RcvHdrTailAddr0;
+ unsigned long long RcvHdrTailAddr1;
+ unsigned long long RcvHdrTailAddr2;
+ unsigned long long RcvHdrTailAddr3;
+ unsigned long long RcvHdrTailAddr4;
+ unsigned long long RcvHdrTailAddr5;
+ unsigned long long RcvHdrTailAddr6;
+ unsigned long long RcvHdrTailAddr7;
+ unsigned long long RcvHdrTailAddr8;
+ unsigned long long ReservedRHTA[7];
+ unsigned long long Sync; /* Software only */
+ unsigned long long Dump; /* Software only */
+ unsigned long long SimVer; /* Software only */
+ unsigned long long ReservedSW[5];
+ unsigned long long SerdesConfig0;
+ unsigned long long SerdesConfig1;
+ unsigned long long SerdesStatus;
+ unsigned long long XGXSConfig;
+ unsigned long long ReservedSW2[4];
+};
+
+#define IPATH_KREG_OFFSET(field) (offsetof(struct \
+ _infinipath_do_not_use_kernel_regs, field) / sizeof(u64))
+#define IPATH_CREG_OFFSET(field) (offsetof( \
+ struct infinipath_counters, field) / sizeof(u64))
+
+static const struct ipath_kregs ipath_ht_kregs = {
+ .kr_control = IPATH_KREG_OFFSET(Control),
+ .kr_counterregbase = IPATH_KREG_OFFSET(CounterRegBase),
+ .kr_debugport = IPATH_KREG_OFFSET(DebugPort),
+ .kr_debugportselect = IPATH_KREG_OFFSET(DebugPortSelect),
+ .kr_errorclear = IPATH_KREG_OFFSET(ErrorClear),
+ .kr_errormask = IPATH_KREG_OFFSET(ErrorMask),
+ .kr_errorstatus = IPATH_KREG_OFFSET(ErrorStatus),
+ .kr_extctrl = IPATH_KREG_OFFSET(ExtCtrl),
+ .kr_extstatus = IPATH_KREG_OFFSET(ExtStatus),
+ .kr_gpio_clear = IPATH_KREG_OFFSET(GPIOClear),
+ .kr_gpio_mask = IPATH_KREG_OFFSET(GPIOMask),
+ .kr_gpio_out = IPATH_KREG_OFFSET(GPIOOut),
+ .kr_gpio_status = IPATH_KREG_OFFSET(GPIOStatus),
+ .kr_hwdiagctrl = IPATH_KREG_OFFSET(HwDiagCtrl),
+ .kr_hwerrclear = IPATH_KREG_OFFSET(HwErrClear),
+ .kr_hwerrmask = IPATH_KREG_OFFSET(HwErrMask),
+ .kr_hwerrstatus = IPATH_KREG_OFFSET(HwErrStatus),
+ .kr_ibcctrl = IPATH_KREG_OFFSET(IBCCtrl),
+ .kr_ibcstatus = IPATH_KREG_OFFSET(IBCStatus),
+ .kr_intblocked = IPATH_KREG_OFFSET(IntBlocked),
+ .kr_intclear = IPATH_KREG_OFFSET(IntClear),
+ .kr_interruptconfig = IPATH_KREG_OFFSET(InterruptConfig),
+ .kr_intmask = IPATH_KREG_OFFSET(IntMask),
+ .kr_intstatus = IPATH_KREG_OFFSET(IntStatus),
+ .kr_mdio = IPATH_KREG_OFFSET(MDIO),
+ .kr_pagealign = IPATH_KREG_OFFSET(PageAlign),
+ .kr_partitionkey = IPATH_KREG_OFFSET(RcvPartitionKey),
+ .kr_portcnt = IPATH_KREG_OFFSET(PortCnt),
+ .kr_rcvbthqp = IPATH_KREG_OFFSET(RcvBTHQP),
+ .kr_rcvbufbase = IPATH_KREG_OFFSET(RcvBufBase),
+ .kr_rcvbufsize = IPATH_KREG_OFFSET(RcvBufSize),
+ .kr_rcvctrl = IPATH_KREG_OFFSET(RcvCtrl),
+ .kr_rcvegrbase = IPATH_KREG_OFFSET(RcvEgrBase),
+ .kr_rcvegrcnt = IPATH_KREG_OFFSET(RcvEgrCnt),
+ .kr_rcvhdrcnt = IPATH_KREG_OFFSET(RcvHdrCnt),
+ .kr_rcvhdrentsize = IPATH_KREG_OFFSET(RcvHdrEntSize),
+ .kr_rcvhdrsize = IPATH_KREG_OFFSET(RcvHdrSize),
+ .kr_rcvintmembase = IPATH_KREG_OFFSET(RxIntMemBase),
+ .kr_rcvintmemsize = IPATH_KREG_OFFSET(RxIntMemSize),
+ .kr_rcvtidbase = IPATH_KREG_OFFSET(RcvTIDBase),
+ .kr_rcvtidcnt = IPATH_KREG_OFFSET(RcvTIDCnt),
+ .kr_revision = IPATH_KREG_OFFSET(Revision),
+ .kr_scratch = IPATH_KREG_OFFSET(Scratch),
+ .kr_sendbuffererror = IPATH_KREG_OFFSET(SendBufferError),
+ .kr_sendctrl = IPATH_KREG_OFFSET(SendCtrl),
+ .kr_sendpioavailaddr = IPATH_KREG_OFFSET(SendPIOAvailAddr),
+ .kr_sendpiobufbase = IPATH_KREG_OFFSET(SendPIOBufBase),
+ .kr_sendpiobufcnt = IPATH_KREG_OFFSET(SendPIOBufCnt),
+ .kr_sendpiosize = IPATH_KREG_OFFSET(SendPIOSize),
+ .kr_sendregbase = IPATH_KREG_OFFSET(SendRegBase),
+ .kr_txintmembase = IPATH_KREG_OFFSET(TxIntMemBase),
+ .kr_txintmemsize = IPATH_KREG_OFFSET(TxIntMemSize),
+ .kr_userregbase = IPATH_KREG_OFFSET(UserRegBase),
+ .kr_serdesconfig0 = IPATH_KREG_OFFSET(SerdesConfig0),
+ .kr_serdesconfig1 = IPATH_KREG_OFFSET(SerdesConfig1),
+ .kr_serdesstatus = IPATH_KREG_OFFSET(SerdesStatus),
+ .kr_xgxsconfig = IPATH_KREG_OFFSET(XGXSConfig),
+ /*
+ * These should not be used directly via ipath_read_kreg64(),
+ * use them with ipath_read_kreg64_port(),
+ */
+ .kr_rcvhdraddr = IPATH_KREG_OFFSET(RcvHdrAddr0),
+ .kr_rcvhdrtailaddr = IPATH_KREG_OFFSET(RcvHdrTailAddr0)
+};
+
+static const struct ipath_cregs ipath_ht_cregs = {
+ .cr_badformatcnt = IPATH_CREG_OFFSET(RxBadFormatCnt),
+ .cr_erricrccnt = IPATH_CREG_OFFSET(RxICRCErrCnt),
+ .cr_errlinkcnt = IPATH_CREG_OFFSET(RxLinkProblemCnt),
+ .cr_errlpcrccnt = IPATH_CREG_OFFSET(RxLPCRCErrCnt),
+ .cr_errpkey = IPATH_CREG_OFFSET(RxPKeyMismatchCnt),
+ .cr_errrcvflowctrlcnt = IPATH_CREG_OFFSET(RxFlowCtrlErrCnt),
+ .cr_err_rlencnt = IPATH_CREG_OFFSET(RxLenErrCnt),
+ .cr_errslencnt = IPATH_CREG_OFFSET(TxLenErrCnt),
+ .cr_errtidfull = IPATH_CREG_OFFSET(RxTIDFullErrCnt),
+ .cr_errtidvalid = IPATH_CREG_OFFSET(RxTIDValidErrCnt),
+ .cr_errvcrccnt = IPATH_CREG_OFFSET(RxVCRCErrCnt),
+ .cr_ibstatuschange = IPATH_CREG_OFFSET(IBStatusChangeCnt),
+ /* calc from Reg_CounterRegBase + offset */
+ .cr_intcnt = IPATH_CREG_OFFSET(LBIntCnt),
+ .cr_invalidrlencnt = IPATH_CREG_OFFSET(RxMaxMinLenErrCnt),
+ .cr_invalidslencnt = IPATH_CREG_OFFSET(TxMaxMinLenErrCnt),
+ .cr_lbflowstallcnt = IPATH_CREG_OFFSET(LBFlowStallCnt),
+ .cr_pktrcvcnt = IPATH_CREG_OFFSET(RxDataPktCnt),
+ .cr_pktrcvflowctrlcnt = IPATH_CREG_OFFSET(RxFlowPktCnt),
+ .cr_pktsendcnt = IPATH_CREG_OFFSET(TxDataPktCnt),
+ .cr_pktsendflowcnt = IPATH_CREG_OFFSET(TxFlowPktCnt),
+ .cr_portovflcnt = IPATH_CREG_OFFSET(RxP0HdrEgrOvflCnt),
+ .cr_rcvebpcnt = IPATH_CREG_OFFSET(RxEBPCnt),
+ .cr_rcvovflcnt = IPATH_CREG_OFFSET(RxBufOvflCnt),
+ .cr_senddropped = IPATH_CREG_OFFSET(TxDroppedPktCnt),
+ .cr_sendstallcnt = IPATH_CREG_OFFSET(TxFlowStallCnt),
+ .cr_sendunderruncnt = IPATH_CREG_OFFSET(TxUnderrunCnt),
+ .cr_wordrcvcnt = IPATH_CREG_OFFSET(RxDwordCnt),
+ .cr_wordsendcnt = IPATH_CREG_OFFSET(TxDwordCnt),
+ .cr_unsupvlcnt = IPATH_CREG_OFFSET(TxUnsupVLErrCnt),
+ .cr_rxdroppktcnt = IPATH_CREG_OFFSET(RxDroppedPktCnt),
+ .cr_iblinkerrrecovcnt = IPATH_CREG_OFFSET(IBLinkErrRecoveryCnt),
+ .cr_iblinkdowncnt = IPATH_CREG_OFFSET(IBLinkDownedCnt),
+ .cr_ibsymbolerrcnt = IPATH_CREG_OFFSET(IBSymbolErrCnt)
+};
+
+/* kr_intstatus, kr_intclear, kr_intmask bits */
+#define INFINIPATH_I_RCVURG_MASK 0x1FF
+#define INFINIPATH_I_RCVAVAIL_MASK 0x1FF
+
+/* kr_hwerrclear, kr_hwerrmask, kr_hwerrstatus, bits */
+#define INFINIPATH_HWE_HTCMEMPARITYERR_SHIFT 0
+#define INFINIPATH_HWE_HTCMEMPARITYERR_MASK 0x3FFFFFULL
+#define INFINIPATH_HWE_HTCLNKABYTE0CRCERR 0x0000000000800000ULL
+#define INFINIPATH_HWE_HTCLNKABYTE1CRCERR 0x0000000001000000ULL
+#define INFINIPATH_HWE_HTCLNKBBYTE0CRCERR 0x0000000002000000ULL
+#define INFINIPATH_HWE_HTCLNKBBYTE1CRCERR 0x0000000004000000ULL
+#define INFINIPATH_HWE_HTCMISCERR4 0x0000000008000000ULL
+#define INFINIPATH_HWE_HTCMISCERR5 0x0000000010000000ULL
+#define INFINIPATH_HWE_HTCMISCERR6 0x0000000020000000ULL
+#define INFINIPATH_HWE_HTCMISCERR7 0x0000000040000000ULL
+#define INFINIPATH_HWE_HTCBUSTREQPARITYERR 0x0000000080000000ULL
+#define INFINIPATH_HWE_HTCBUSTRESPPARITYERR 0x0000000100000000ULL
+#define INFINIPATH_HWE_HTCBUSIREQPARITYERR 0x0000000200000000ULL
+#define INFINIPATH_HWE_MEMBISTFAILED 0x0040000000000000ULL
+#define INFINIPATH_HWE_COREPLL_FBSLIP 0x0080000000000000ULL
+#define INFINIPATH_HWE_COREPLL_RFSLIP 0x0100000000000000ULL
+#define INFINIPATH_HWE_HTBPLL_FBSLIP 0x0200000000000000ULL
+#define INFINIPATH_HWE_HTBPLL_RFSLIP 0x0400000000000000ULL
+#define INFINIPATH_HWE_HTAPLL_FBSLIP 0x0800000000000000ULL
+#define INFINIPATH_HWE_HTAPLL_RFSLIP 0x1000000000000000ULL
+#define INFINIPATH_HWE_SERDESPLLFAILED 0x2000000000000000ULL
+
+/* kr_extstatus bits */
+#define INFINIPATH_EXTS_FREQSEL 0x2
+#define INFINIPATH_EXTS_SERDESSEL 0x4
+#define INFINIPATH_EXTS_MEMBIST_ENDTEST 0x0000000000004000
+#define INFINIPATH_EXTS_MEMBIST_CORRECT 0x0000000000008000
+
+/*
+ * masks and bits that are different in different chips, or present only
+ * in one
+ */
+static const ipath_err_t infinipath_hwe_htcmemparityerr_mask =
+ INFINIPATH_HWE_HTCMEMPARITYERR_MASK;
+static const ipath_err_t infinipath_hwe_htcmemparityerr_shift =
+ INFINIPATH_HWE_HTCMEMPARITYERR_SHIFT;
+
+static const ipath_err_t infinipath_hwe_htclnkabyte0crcerr =
+ INFINIPATH_HWE_HTCLNKABYTE0CRCERR;
+static const ipath_err_t infinipath_hwe_htclnkabyte1crcerr =
+ INFINIPATH_HWE_HTCLNKABYTE1CRCERR;
+static const ipath_err_t infinipath_hwe_htclnkbbyte0crcerr =
+ INFINIPATH_HWE_HTCLNKBBYTE0CRCERR;
+static const ipath_err_t infinipath_hwe_htclnkbbyte1crcerr =
+ INFINIPATH_HWE_HTCLNKBBYTE1CRCERR;
+
+#define _IPATH_GPIO_SDA_NUM 1
+#define _IPATH_GPIO_SCL_NUM 0
+
+#define IPATH_GPIO_SDA \
+ (1ULL << (_IPATH_GPIO_SDA_NUM+INFINIPATH_EXTC_GPIOOE_SHIFT))
+#define IPATH_GPIO_SCL \
+ (1ULL << (_IPATH_GPIO_SCL_NUM+INFINIPATH_EXTC_GPIOOE_SHIFT))
+
+/**
+ * ipath_ht_handle_hwerrors - display hardware errors
+ * @dd: the infinipath device
+ * @msg: the output buffer
+ * @msgl: the size of the output buffer
+ *
+ * Use same msg buffer as regular errors to avoid
+ * excessive stack use. Most hardware errors are catastrophic, but for
+ * right now, we'll print them and continue.
+ * We reuse the same message buffer as ipath_handle_errors() to avoid
+ * excessive stack usage.
+ */
+static void ipath_ht_handle_hwerrors(struct ipath_devdata *dd, char *msg,
+ size_t msgl)
+{
+ ipath_err_t hwerrs;
+ u32 bits, ctrl;
+ int isfatal = 0;
+ char bitsmsg[64];
+
+ hwerrs = ipath_read_kreg64(dd, dd->ipath_kregs->kr_hwerrstatus);
+
+ if (!hwerrs) {
+ ipath_cdbg(VERBOSE, "Called but no hardware errors set\n");
+ /*
+ * better than printing cofusing messages
+ * This seems to be related to clearing the crc error, or
+ * the pll error during init.
+ */
+ return;
+ } else if (hwerrs == -1LL) {
+ ipath_dev_err(dd, "Read of hardware error status failed "
+ "(all bits set); ignoring\n");
+ return;
+ }
+ ipath_stats.sps_hwerrs++;
+
+ /* Always clear the error status register, except MEMBISTFAIL,
+ * regardless of whether we continue or stop using the chip.
+ * We want that set so we know it failed, even across driver reload.
+ * We'll still ignore it in the hwerrmask. We do this partly for
+ * diagnostics, but also for support */
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrclear,
+ hwerrs&~INFINIPATH_HWE_MEMBISTFAILED);
+
+ hwerrs &= dd->ipath_hwerrmask;
+
+ /*
+ * make sure we get this much out, unless told to be quiet,
+ * or it's occurred within the last 5 seconds
+ */
+ if ((hwerrs & ~dd->ipath_lasthwerror) ||
+ (ipath_debug & __IPATH_VERBDBG))
+ dev_info(&dd->pcidev->dev, "Hardware error: hwerr=0x%llx "
+ "(cleared)\n", (unsigned long long) hwerrs);
+ dd->ipath_lasthwerror |= hwerrs;
+
+ if (hwerrs & ~infinipath_hwe_bitsextant)
+ ipath_dev_err(dd, "hwerror interrupt with unknown errors "
+ "%llx set\n", (unsigned long long)
+ (hwerrs & ~infinipath_hwe_bitsextant));
+
+ ctrl = ipath_read_kreg32(dd, dd->ipath_kregs->kr_control);
+ if (ctrl & INFINIPATH_C_FREEZEMODE) {
+ if (hwerrs) {
+ /*
+ * if any set that we aren't ignoring; only
+ * make the complaint once, in case it's stuck
+ * or recurring, and we get here multiple
+ * times.
+ */
+ if (dd->ipath_flags & IPATH_INITTED) {
+ ipath_dev_err(dd, "Fatal Error (freeze "
+ "mode), no longer usable\n");
+ isfatal = 1;
+ }
+ *dd->ipath_statusp &= ~IPATH_STATUS_IB_READY;
+ /* mark as having had error */
+ *dd->ipath_statusp |= IPATH_STATUS_HWERROR;
+ /*
+ * mark as not usable, at a minimum until driver
+ * is reloaded, probably until reboot, since no
+ * other reset is possible.
+ */
+ dd->ipath_flags &= ~IPATH_INITTED;
+ } else {
+ ipath_dbg("Clearing freezemode on ignored hardware "
+ "error\n");
+ ctrl &= ~INFINIPATH_C_FREEZEMODE;
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_control,
+ ctrl);
+ }
+ }
+
+ *msg = '\0';
+
+ /*
+ * may someday want to decode into which bits are which
+ * functional area for parity errors, etc.
+ */
+ if (hwerrs & (infinipath_hwe_htcmemparityerr_mask
+ << INFINIPATH_HWE_HTCMEMPARITYERR_SHIFT)) {
+ bits = (u32) ((hwerrs >>
+ INFINIPATH_HWE_HTCMEMPARITYERR_SHIFT) &
+ INFINIPATH_HWE_HTCMEMPARITYERR_MASK);
+ snprintf(bitsmsg, sizeof bitsmsg, "[HTC Parity Errs %x] ",
+ bits);
+ strlcat(msg, bitsmsg, msgl);
+ }
+ if (hwerrs & (INFINIPATH_HWE_RXEMEMPARITYERR_MASK
+ << INFINIPATH_HWE_RXEMEMPARITYERR_SHIFT)) {
+ bits = (u32) ((hwerrs >>
+ INFINIPATH_HWE_RXEMEMPARITYERR_SHIFT) &
+ INFINIPATH_HWE_RXEMEMPARITYERR_MASK);
+ snprintf(bitsmsg, sizeof bitsmsg, "[RXE Parity Errs %x] ",
+ bits);
+ strlcat(msg, bitsmsg, msgl);
+ }
+ if (hwerrs & (INFINIPATH_HWE_TXEMEMPARITYERR_MASK
+ << INFINIPATH_HWE_TXEMEMPARITYERR_SHIFT)) {
+ bits = (u32) ((hwerrs >>
+ INFINIPATH_HWE_TXEMEMPARITYERR_SHIFT) &
+ INFINIPATH_HWE_TXEMEMPARITYERR_MASK);
+ snprintf(bitsmsg, sizeof bitsmsg, "[TXE Parity Errs %x] ",
+ bits);
+ strlcat(msg, bitsmsg, msgl);
+ }
+ if (hwerrs & INFINIPATH_HWE_IBCBUSTOSPCPARITYERR)
+ strlcat(msg, "[IB2IPATH Parity]", msgl);
+ if (hwerrs & INFINIPATH_HWE_IBCBUSFRSPCPARITYERR)
+ strlcat(msg, "[IPATH2IB Parity]", msgl);
+ if (hwerrs & INFINIPATH_HWE_HTCBUSIREQPARITYERR)
+ strlcat(msg, "[HTC Ireq Parity]", msgl);
+ if (hwerrs & INFINIPATH_HWE_HTCBUSTREQPARITYERR)
+ strlcat(msg, "[HTC Treq Parity]", msgl);
+ if (hwerrs & INFINIPATH_HWE_HTCBUSTRESPPARITYERR)
+ strlcat(msg, "[HTC Tresp Parity]", msgl);
+
+/* keep the code below somewhat more readonable; not used elsewhere */
+#define _IPATH_HTLINK0_CRCBITS (infinipath_hwe_htclnkabyte0crcerr | \
+ infinipath_hwe_htclnkabyte1crcerr)
+#define _IPATH_HTLINK1_CRCBITS (infinipath_hwe_htclnkbbyte0crcerr | \
+ infinipath_hwe_htclnkbbyte1crcerr)
+#define _IPATH_HTLANE0_CRCBITS (infinipath_hwe_htclnkabyte0crcerr | \
+ infinipath_hwe_htclnkbbyte0crcerr)
+#define _IPATH_HTLANE1_CRCBITS (infinipath_hwe_htclnkabyte1crcerr | \
+ infinipath_hwe_htclnkbbyte1crcerr)
+ if (hwerrs & (_IPATH_HTLINK0_CRCBITS | _IPATH_HTLINK1_CRCBITS)) {
+ char bitsmsg[64];
+ ipath_err_t crcbits = hwerrs &
+ (_IPATH_HTLINK0_CRCBITS | _IPATH_HTLINK1_CRCBITS);
+ /* don't check if 8bit HT */
+ if (dd->ipath_flags & IPATH_8BIT_IN_HT0)
+ crcbits &= ~infinipath_hwe_htclnkabyte1crcerr;
+ /* don't check if 8bit HT */
+ if (dd->ipath_flags & IPATH_8BIT_IN_HT1)
+ crcbits &= ~infinipath_hwe_htclnkbbyte1crcerr;
+ /*
+ * we'll want to ignore link errors on link that is
+ * not in use, if any. For now, complain about both
+ */
+ if (crcbits) {
+ u16 ctrl0, ctrl1;
+ snprintf(bitsmsg, sizeof bitsmsg,
+ "[HT%s lane %s CRC (%llx); "
+ "ignore till reload]",
+ !(crcbits & _IPATH_HTLINK1_CRCBITS) ?
+ "0 (A)" : (!(crcbits & _IPATH_HTLINK0_CRCBITS)
+ ? "1 (B)" : "0+1 (A+B)"),
+ !(crcbits & _IPATH_HTLANE1_CRCBITS) ? "0"
+ : (!(crcbits & _IPATH_HTLANE0_CRCBITS) ? "1" :
+ "0+1"), (unsigned long long) crcbits);
+ strlcat(msg, bitsmsg, msgl);
+
+ /*
+ * print extra info for debugging. slave/primary
+ * config word 4, 8 (link control 0, 1)
+ */
+
+ if (pci_read_config_word(dd->pcidev,
+ dd->ipath_ht_slave_off +
+ 0x4, &ctrl0))
+ dev_info(&dd->pcidev->dev, "Couldn't read "
+ "linkctrl0 of slave/primary "
+ "config block\n");
+ else if (!(ctrl0 & 1 << 6))
+ /* not if EOC bit set */
+ ipath_dbg("HT linkctrl0 0x%x%s%s\n", ctrl0,
+ ((ctrl0 >> 8) & 7) ? " CRC" : "",
+ ((ctrl0 >> 4) & 1) ? "linkfail" :
+ "");
+ if (pci_read_config_word(
+ dd->pcidev,
+ dd->ipath_ht_slave_off + 0x8, &ctrl1))
+ dev_info(&dd->pcidev->dev, "Couldn't read "
+ "linkctrl1 of slave/primary "
+ "config block\n");
+ else if (!(ctrl1 & 1 << 6))
+ /* not if EOC bit set */
+ ipath_dbg("HT linkctrl1 0x%x%s%s\n", ctrl1,
+ ((ctrl1 >> 8) & 7) ? " CRC" : "",
+ ((ctrl1 >> 4) & 1) ? "linkfail" :
+ "");
+
+ /* disable until driver reloaded */
+ dd->ipath_hwerrmask &= ~crcbits;
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask,
+ dd->ipath_hwerrmask);
+ ipath_dbg("HT crc errs: %s\n", msg);
+ } else
+ ipath_dbg("ignoring HT crc errors 0x%llx, "
+ "not in use\n", (unsigned long long)
+ (hwerrs & (_IPATH_HTLINK0_CRCBITS |
+ _IPATH_HTLINK1_CRCBITS)));
+ }
+
+ if (hwerrs & INFINIPATH_HWE_HTCMISCERR5)
+ strlcat(msg, "[HT core Misc5]", msgl);
+ if (hwerrs & INFINIPATH_HWE_HTCMISCERR6)
+ strlcat(msg, "[HT core Misc6]", msgl);
+ if (hwerrs & INFINIPATH_HWE_HTCMISCERR7)
+ strlcat(msg, "[HT core Misc7]", msgl);
+ if (hwerrs & INFINIPATH_HWE_MEMBISTFAILED) {
+ strlcat(msg, "[Memory BIST test failed, HT-400 unusable]",
+ msgl);
+ /* ignore from now on, so disable until driver reloaded */
+ dd->ipath_hwerrmask &= ~INFINIPATH_HWE_MEMBISTFAILED;
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask,
+ dd->ipath_hwerrmask);
+ }
+#define _IPATH_PLL_FAIL (INFINIPATH_HWE_COREPLL_FBSLIP | \
+ INFINIPATH_HWE_COREPLL_RFSLIP | \
+ INFINIPATH_HWE_HTBPLL_FBSLIP | \
+ INFINIPATH_HWE_HTBPLL_RFSLIP | \
+ INFINIPATH_HWE_HTAPLL_FBSLIP | \
+ INFINIPATH_HWE_HTAPLL_RFSLIP)
+
+ if (hwerrs & _IPATH_PLL_FAIL) {
+ snprintf(bitsmsg, sizeof bitsmsg,
+ "[PLL failed (%llx), HT-400 unusable]",
+ (unsigned long long) (hwerrs & _IPATH_PLL_FAIL));
+ strlcat(msg, bitsmsg, msgl);
+ /* ignore from now on, so disable until driver reloaded */
+ dd->ipath_hwerrmask &= ~(hwerrs & _IPATH_PLL_FAIL);
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask,
+ dd->ipath_hwerrmask);
+ }
+
+ if (hwerrs & INFINIPATH_HWE_SERDESPLLFAILED) {
+ /*
+ * If it occurs, it is left masked since the eternal
+ * interface is unused
+ */
+ dd->ipath_hwerrmask &= ~INFINIPATH_HWE_SERDESPLLFAILED;
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask,
+ dd->ipath_hwerrmask);
+ }
+
+ if (hwerrs & INFINIPATH_HWE_RXDSYNCMEMPARITYERR)
+ strlcat(msg, "[Rx Dsync]", msgl);
+ if (hwerrs & INFINIPATH_HWE_SERDESPLLFAILED)
+ strlcat(msg, "[SerDes PLL]", msgl);
+
+ ipath_dev_err(dd, "%s hardware error\n", msg);
+ if (isfatal && !ipath_diag_alive && dd->ipath_freezemsg)
+ /*
+ * for status file; if no trailing brace is copied,
+ * we'll know it was truncated.
+ */
+ snprintf(dd->ipath_freezemsg,
+ dd->ipath_freezelen, "{%s}", msg);
+}
+
+/**
+ * ipath_ht_boardname - fill in the board name
+ * @dd: the infinipath device
+ * @name: the output buffer
+ * @namelen: the size of the output buffer
+ *
+ * fill in the board name, based on the board revision register
+ */
+int ipath_ht_boardname(struct ipath_devdata *dd, char *name,
+ size_t namelen)
+{
+ char *n = NULL;
+ u8 boardrev = dd->ipath_boardrev;
+
+ switch (boardrev) {
+ case 4: /* Ponderosa is one of the bringup boards */
+ n = "Ponderosa";
+ break;
+ case 5: /* HT-460 original production board */
+ n = "InfiniPath_HT-460";
+ break;
+ case 6:
+ n = "OEM_Board_3";
+ break;
+ case 7:
+ /* HT-460 small form factor production board */
+ n = "InfiniPath_HT-465";
+ break;
+ case 8:
+ n = "LS/X-1";
+ break;
+ case 9: /* Comstock bringup test board */
+ n = "Comstock";
+ break;
+ case 10:
+ n = "OEM_Board_2";
+ break;
+ case 11:
+ n = "InfiniPath_HT-470";
+ break;
+ case 12:
+ n = "OEM_Board_4";
+ break;
+ default: /* don't know, just print the number */
+ dev_err(&dd->pcidev->dev, "Don't yet know about board "
+ "with ID %u\n", boardrev);
+ snprintf(name, namelen, "UnknownBoardRev%u", boardrev);
+ break;
+ }
+ if (n)
+ snprintf(name, namelen, "%s", n);
+
+ if (dd->ipath_majrev != 3 || dd->ipath_minrev != 2) {
+ /*
+ * This version of the driver only supports the HT-400
+ * Rev 3.2
+ */
+ ipath_dev_err(dd,
+ "Unsupported HT-400 revision %u.%u!\n",
+ dd->ipath_majrev, dd->ipath_minrev);
+ return 1;
+ }
+ /*
+ * pkt/word counters are 32 bit, and therefore wrap fast enough
+ * that we snapshot them from a timer, and maintain 64 bit shadow
+ * copies
+ */
+ dd->ipath_flags |= IPATH_32BITCOUNTERS;
+ if (dd->ipath_htspeed != 800)
+ ipath_dev_err(dd,
+ "Incorrectly configured for HT @ %uMHz\n",
+ dd->ipath_htspeed);
+ if (dd->ipath_boardrev == 7 || dd->ipath_boardrev == 11 ||
+ dd->ipath_boardrev == 6)
+ dd->ipath_flags |= IPATH_GPIO_INTR;
+ else
+ dd->ipath_flags |= IPATH_POLL_RX_INTR;
+ if (dd->ipath_boardrev == 8) { /* LS/X-1 */
+ u64 val;
+ val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_extstatus);
+ if (val & INFINIPATH_EXTS_SERDESSEL) {
+ /*
+ * hardware disabled
+ *
+ * This means that the chip is hardware disabled,
+ * and will not be able to bring up the link,
+ * in any case. We special case this and abort
+ * early, to avoid later messages. We also set
+ * the DISABLED status bit
+ */
+ ipath_dbg("Unit %u is hardware-disabled\n",
+ dd->ipath_unit);
+ *dd->ipath_statusp |= IPATH_STATUS_DISABLED;
+ /* this value is handled differently */
+ return 2;
+ }
+ }
+ return 0;
+}
+
+static void ipath_check_htlink(struct ipath_devdata *dd)
+{
+ u8 linkerr, link_off, i;
+
+ for (i = 0; i < 2; i++) {
+ link_off = dd->ipath_ht_slave_off + i * 4 + 0xd;
+ if (pci_read_config_byte(dd->pcidev, link_off, &linkerr))
+ dev_info(&dd->pcidev->dev, "Couldn't read "
+ "linkerror%d of HT slave/primary block\n",
+ i);
+ else if (linkerr & 0xf0) {
+ ipath_cdbg(VERBOSE, "HT linkerr%d bits 0x%x set, "
+ "clearing\n", linkerr >> 4, i);
+ /*
+ * writing the linkerr bits that are set should
+ * clear them
+ */
+ if (pci_write_config_byte(dd->pcidev, link_off,
+ linkerr))
+ ipath_dbg("Failed write to clear HT "
+ "linkerror%d\n", i);
+ if (pci_read_config_byte(dd->pcidev, link_off,
+ &linkerr))
+ dev_info(&dd->pcidev->dev,
+ "Couldn't reread linkerror%d of "
+ "HT slave/primary block\n", i);
+ else if (linkerr & 0xf0)
+ dev_info(&dd->pcidev->dev,
+ "HT linkerror%d bits 0x%x "
+ "couldn't be cleared\n",
+ i, linkerr >> 4);
+ }
+ }
+}
+
+static int ipath_setup_ht_reset(struct ipath_devdata *dd)
+{
+ ipath_dbg("No reset possible for HT-400\n");
+ return 0;
+}
+
+#define HT_CAPABILITY_ID 0x08 /* HT capabilities not defined in kernel */
+#define HT_INTR_DISC_CONFIG 0x80 /* HT interrupt and discovery cap */
+#define HT_INTR_REG_INDEX 2 /* intconfig requires indirect accesses */
+
+/**
+ * ipath_setup_ht_config - setup the interruptconfig register
+ * @dd: the infinipath device
+ * @pdev: the PCI device
+ *
+ * setup the interruptconfig register from the HT config info.
+ * Also clear CRC errors in HT linkcontrol, if necessary.
+ * This is done only for the real hardware. It is done before
+ * chip address space is initted, so can't touch infinipath registers
+ */
+static int ipath_setup_ht_config(struct ipath_devdata *dd,
+ struct pci_dev *pdev)
+{
+ u8 cap_type;
+ u32 int_handler_addr_lower;
+ u32 int_handler_addr_upper;
+ u64 ihandler = 0;
+ int i, pos, ret = 0;
+
+ /*
+ * Read the capability info to find the interrupt info, and also
+ * handle clearing CRC errors in linkctrl register if necessary. We
+ * do this early, before we ever enable errors or hardware errors,
+ * mostly to avoid causing the chip to enter freeze mode.
+ */
+ pos = pci_find_capability(pdev, HT_CAPABILITY_ID);
+ if (!pos) {
+ ipath_dev_err(dd, "Couldn't find HyperTransport "
+ "capability; no interrupts\n");
+ return -ENODEV;
+ }
+ do {
+ /* the HT capability type byte is 3 bytes after the
+ * capability byte.
+ */
+ if (pci_read_config_byte(pdev, pos + 3, &cap_type)) {
+ dev_info(&pdev->dev, "Couldn't read config "
+ "command @ %d\n", pos);
+ continue;
+ }
+ if (!(cap_type & 0xE0)) {
+ /* bits 13-15 of command==0 is slave/primary block.
+ * Clear any HT CRC errors. We only bother to do
+ * this at load time, because it's OK if it happened
+ * before we were loaded (first time after
+ * boot/reset), but any time after that, it's fatal
+ * anyway. Also need to not check for for upper
+ * byte errors if we are in 8 bit mode, so figure
+ * out our width. For now, at least, also complain
+ * if it's 8 bit.
+ */
+ u8 linkwidth = 0, linkerr, link_a_b_off, link_off;
+ u16 linkctrl = 0;
+
+ dd->ipath_ht_slave_off = pos;
+ /* command word, master_host bit */
+ /* master host || slave */
+ if ((cap_type >> 2) & 1)
+ link_a_b_off = 4;
+ else
+ link_a_b_off = 0;
+ ipath_cdbg(VERBOSE, "HT%u (Link %c) connected to "
+ "processor\n", link_a_b_off ? 1 : 0,
+ link_a_b_off ? 'B' : 'A');
+
+ link_a_b_off += pos;
+
+ /*
+ * check both link control registers; clear both
+ * HT CRC sets if necessary.
+ */
+
+ for (i = 0; i < 2; i++) {
+ link_off = pos + i * 4 + 0x4;
+ if (pci_read_config_word
+ (pdev, link_off, &linkctrl))
+ ipath_dev_err(dd, "Couldn't read "
+ "HT link control%d "
+ "register\n", i);
+ else if (linkctrl & (0xf << 8)) {
+ ipath_cdbg(
+ VERBOSE,
+ "Clear linkctrl%d CRC "
+ "Error bits %x\n", i,
+ linkctrl & (0xf << 8));
+ /*
+ * now write them back to clear
+ * the error.
+ */
+ pci_write_config_byte(
+ pdev, link_off,
+ linkctrl & (0xf << 8));
+ }
+ }
+
+ /*
+ * As with HT CRC bits, same for protocol errors
+ * that might occur during boot.
+ */
+
+ for (i = 0; i < 2; i++) {
+ link_off = pos + i * 4 + 0xd;
+ if (pci_read_config_byte(
+ pdev, link_off, &linkerr))
+ dev_info(&pdev->dev,
+ "Couldn't read "
+ "linkerror%d of HT "
+ "slave/primary block\n",
+ i);
+ else if (linkerr & 0xf0) {
+ ipath_cdbg(VERBOSE,
+ "HT linkerr%d bits "
+ "0x%x set, clearing\n",
+ linkerr >> 4, i);
+ /*
+ * writing the linkerr bits that
+ * are set will clear them
+ */
+ if (pci_write_config_byte
+ (pdev, link_off, linkerr))
+ ipath_dbg("Failed write to "
+ "clear HT "
+ "linkerror%d\n",
+ i);
+ if (pci_read_config_byte
+ (pdev, link_off, &linkerr))
+ dev_info(&pdev->dev,
+ "Couldn't "
+ "reread "
+ "linkerror%d of "
+ "HT "
+ "slave/primary "
+ "block\n",
+ i);
+ else if (linkerr & 0xf0)
+ dev_info(&pdev->dev,
+ "HT linkerror%d "
+ "bits 0x%x "
+ "couldn't be "
+ "cleared\n",
+ i, linkerr >> 4);
+ }
+ }
+
+ /*
+ * this is just for our link to the host, not
+ * devices connected through tunnel.
+ */
+
+ if (pci_read_config_byte
+ (pdev, link_a_b_off + 7, &linkwidth))
+ ipath_dev_err(dd, "Couldn't read HT link "
+ "width config register\n");
+ else {
+ u32 width;
+ switch (linkwidth & 7) {
+ case 5:
+ width = 4;
+ break;
+ case 4:
+ width = 2;
+ break;
+ case 3:
+ width = 32;
+ break;
+ case 1:
+ width = 16;
+ break;
+ case 0:
+ default: /* if wrong, assume 8 bit */
+ width = 8;
+ break;
+ }
+ ((struct ipath_devdata *)
+ pci_get_drvdata(pdev))->ipath_htwidth =
+ width;
+
+ if (linkwidth != 0x11) {
+ ipath_dev_err(dd, "Not configured "
+ "for 16 bit HT (%x)\n",
+ linkwidth);
+ if (!(linkwidth & 0xf)) {
+ ipath_dbg("Will ignore "
+ "HT lane1 "
+ "errors\n");
+ ((struct ipath_devdata *)
+ pci_get_drvdata(pdev))->
+ ipath_flags |=
+ IPATH_8BIT_IN_HT0;
+ }
+ }
+ }
+
+ /*
+ * this is just for our link to the host, not
+ * devices connected through tunnel.
+ */
+
+ if (pci_read_config_byte
+ (pdev, link_a_b_off + 0xd, &linkwidth))
+ ipath_dev_err(dd,
+ "Couldn't read HT link frequency config register\n");
+ else {
+ u32 speed;
+ switch (linkwidth & 0xf) {
+ case 6:
+ speed = 1000;
+ break;
+ case 5:
+ speed = 800;
+ break;
+ case 4:
+ speed = 600;
+ break;
+ case 3:
+ speed = 500;
+ break;
+ case 2:
+ speed = 400;
+ break;
+ case 1:
+ speed = 300;
+ break;
+ default:
+ /*
+ * assume reserved and
+ * vendor-specific are 200...
+ */
+ case 0:
+ speed = 200;
+ break;
+ }
+ ((struct ipath_devdata *)
+ pci_get_drvdata(pdev))->ipath_htspeed = speed;
+ }
+ } else if (cap_type == HT_INTR_DISC_CONFIG) {
+ /* use indirection register to get the intr handler */
+ u32 intvec;
+ pci_write_config_byte(pdev, pos + HT_INTR_REG_INDEX,
+ 0x10);
+ pci_read_config_dword(pdev, pos + 4,
+ &int_handler_addr_lower);
+
+ pci_write_config_byte(pdev, pos + HT_INTR_REG_INDEX,
+ 0x11);
+ pci_read_config_dword(pdev, pos + 4,
+ &int_handler_addr_upper);
+
+ ihandler = (u64) int_handler_addr_lower |
+ ((u64) int_handler_addr_upper << 32);
+
+ /*
+ * kernels with CONFIG_PCI_MSI set the vector in
+ * the irq field of struct pci_device, so we use
+ * that to program the HT-400 internal interrupt
+ * register (not config space) with that value. The
+ * BIOS must still have done the basic MSI setup.
+ */
+ intvec = pdev->irq;
+ /*
+ * clear any vector bits there; normally not set
+ * but we'll overload this for some debug purposes
+ * (setting the HTC debug register value from
+ * software, rather than GPIOs), so it might be
+ * set on a driver reload.
+ */
+ ihandler &= ~0xff0000;
+ /* x86 vector goes in intrinfo[23:16] */
+ ihandler |= intvec << 16;
+ ipath_cdbg(VERBOSE, "ihandler lower %x, upper %x, intvec %x, interruptconfig %llx\n",
+ int_handler_addr_lower, int_handler_addr_upper,
+ intvec, (unsigned long long) ihandler);
+
+ /* can't program yet, so save for interrupt setup */
+ dd->ipath_intconfig = ihandler;
+ /* keep going, so we find link control stuff also */
+ }
+
+ } while ((pos = pci_find_next_capability(pdev, pos, HT_CAPABILITY_ID)));
+
+ if (!ihandler) {
+ ipath_dev_err(dd,
+ "Couldn't find interrupt handler in config space\n");
+ ret = -ENODEV;
+ }
+ return ret;
+}
+
+/**
+ * ipath_setup_ht_cleanup - clean up any per-chip chip-specific stuff
+ * @dd: the infinipath device
+ *
+ * Called during driver unload.
+ * This is currently a nop for the HT-400, not for all chips
+ */
+static void ipath_setup_ht_cleanup(struct ipath_devdata *dd)
+{
+}
+
+/**
+ * ipath_setup_ht_setextled - set the state of the two external LEDs
+ * @dd: the infinipath device
+ * @lst: the L state
+ * @ltst: the LT state
+ *
+ * Set the state of the two external LEDs, to indicate physical and
+ * logical state of IB link. For this chip (at least with recommended
+ * board pinouts), LED1 is Green (physical state), and LED2 is Yellow
+ * (logical state)
+ *
+ * Note: We try to match the Mellanox HCA LED behavior as best
+ * we can. Green indicates physical link state is OK (something is
+ * plugged in, and we can train).
+ * Amber indicates the link is logically up (ACTIVE).
+ * Mellanox further blinks the amber LED to indicate data packet
+ * activity, but we have no hardware support for that, so it would
+ * require waking up every 10-20 msecs and checking the counters
+ * on the chip, and then turning the LED off if appropriate. That's
+ * visible overhead, so not something we will do.
+ *
+ */
+static void ipath_setup_ht_setextled(struct ipath_devdata *dd,
+ u64 lst, u64 ltst)
+{
+ u64 extctl;
+
+ /* the diags use the LED to indicate diag info, so we leave
+ * the external LED alone when the diags are running */
+ if (ipath_diag_alive)
+ return;
+
+ /*
+ * start by setting both LED control bits to off, then turn
+ * on the appropriate bit(s).
+ */
+ if (dd->ipath_boardrev == 8) { /* LS/X-1 uses different pins */
+ /*
+ * major difference is that INFINIPATH_EXTC_LEDGBLERR_OFF
+ * is inverted, because it is normally used to indicate
+ * a hardware fault at reset, if there were errors
+ */
+ extctl = (dd->ipath_extctrl & ~INFINIPATH_EXTC_LEDGBLOK_ON)
+ | INFINIPATH_EXTC_LEDGBLERR_OFF;
+ if (ltst == INFINIPATH_IBCS_LT_STATE_LINKUP)
+ extctl &= ~INFINIPATH_EXTC_LEDGBLERR_OFF;
+ if (lst == INFINIPATH_IBCS_L_STATE_ACTIVE)
+ extctl |= INFINIPATH_EXTC_LEDGBLOK_ON;
+ }
+ else {
+ extctl = dd->ipath_extctrl & ~(INFINIPATH_EXTC_LED1PRIPORT_ON |
+ INFINIPATH_EXTC_LED2PRIPORT_ON);
+ if (ltst == INFINIPATH_IBCS_LT_STATE_LINKUP)
+ extctl |= INFINIPATH_EXTC_LED1PRIPORT_ON;
+ if (lst == INFINIPATH_IBCS_L_STATE_ACTIVE)
+ extctl |= INFINIPATH_EXTC_LED2PRIPORT_ON;
+ }
+ dd->ipath_extctrl = extctl;
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_extctrl, extctl);
+}
+
+static void ipath_init_ht_variables(void)
+{
+ ipath_gpio_sda_num = _IPATH_GPIO_SDA_NUM;
+ ipath_gpio_scl_num = _IPATH_GPIO_SCL_NUM;
+ ipath_gpio_sda = IPATH_GPIO_SDA;
+ ipath_gpio_scl = IPATH_GPIO_SCL;
+
+ infinipath_i_bitsextant =
+ (INFINIPATH_I_RCVURG_MASK << INFINIPATH_I_RCVURG_SHIFT) |
+ (INFINIPATH_I_RCVAVAIL_MASK << INFINIPATH_I_RCVAVAIL_SHIFT) |
+ INFINIPATH_I_ERROR | INFINIPATH_I_SPIOSENT |
+ INFINIPATH_I_SPIOBUFAVAIL | INFINIPATH_I_GPIO;
+
+ infinipath_e_bitsextant =
+ INFINIPATH_E_RFORMATERR | INFINIPATH_E_RVCRC |
+ INFINIPATH_E_RICRC | INFINIPATH_E_RMINPKTLEN |
+ INFINIPATH_E_RMAXPKTLEN | INFINIPATH_E_RLONGPKTLEN |
+ INFINIPATH_E_RSHORTPKTLEN | INFINIPATH_E_RUNEXPCHAR |
+ INFINIPATH_E_RUNSUPVL | INFINIPATH_E_REBP |
+ INFINIPATH_E_RIBFLOW | INFINIPATH_E_RBADVERSION |
+ INFINIPATH_E_RRCVEGRFULL | INFINIPATH_E_RRCVHDRFULL |
+ INFINIPATH_E_RBADTID | INFINIPATH_E_RHDRLEN |
+ INFINIPATH_E_RHDR | INFINIPATH_E_RIBLOSTLINK |
+ INFINIPATH_E_SMINPKTLEN | INFINIPATH_E_SMAXPKTLEN |
+ INFINIPATH_E_SUNDERRUN | INFINIPATH_E_SPKTLEN |
+ INFINIPATH_E_SDROPPEDSMPPKT | INFINIPATH_E_SDROPPEDDATAPKT |
+ INFINIPATH_E_SPIOARMLAUNCH | INFINIPATH_E_SUNEXPERRPKTNUM |
+ INFINIPATH_E_SUNSUPVL | INFINIPATH_E_IBSTATUSCHANGED |
+ INFINIPATH_E_INVALIDADDR | INFINIPATH_E_RESET |
+ INFINIPATH_E_HARDWARE;
+
+ infinipath_hwe_bitsextant =
+ (INFINIPATH_HWE_HTCMEMPARITYERR_MASK <<
+ INFINIPATH_HWE_HTCMEMPARITYERR_SHIFT) |
+ (INFINIPATH_HWE_TXEMEMPARITYERR_MASK <<
+ INFINIPATH_HWE_TXEMEMPARITYERR_SHIFT) |
+ (INFINIPATH_HWE_RXEMEMPARITYERR_MASK <<
+ INFINIPATH_HWE_RXEMEMPARITYERR_SHIFT) |
+ INFINIPATH_HWE_HTCLNKABYTE0CRCERR |
+ INFINIPATH_HWE_HTCLNKABYTE1CRCERR |
+ INFINIPATH_HWE_HTCLNKBBYTE0CRCERR |
+ INFINIPATH_HWE_HTCLNKBBYTE1CRCERR | INFINIPATH_HWE_HTCMISCERR4 |
+ INFINIPATH_HWE_HTCMISCERR5 | INFINIPATH_HWE_HTCMISCERR6 |
+ INFINIPATH_HWE_HTCMISCERR7 |
+ INFINIPATH_HWE_HTCBUSTREQPARITYERR |
+ INFINIPATH_HWE_HTCBUSTRESPPARITYERR |
+ INFINIPATH_HWE_HTCBUSIREQPARITYERR |
+ INFINIPATH_HWE_RXDSYNCMEMPARITYERR |
+ INFINIPATH_HWE_MEMBISTFAILED |
+ INFINIPATH_HWE_COREPLL_FBSLIP | INFINIPATH_HWE_COREPLL_RFSLIP |
+ INFINIPATH_HWE_HTBPLL_FBSLIP | INFINIPATH_HWE_HTBPLL_RFSLIP |
+ INFINIPATH_HWE_HTAPLL_FBSLIP | INFINIPATH_HWE_HTAPLL_RFSLIP |
+ INFINIPATH_HWE_SERDESPLLFAILED |
+ INFINIPATH_HWE_IBCBUSTOSPCPARITYERR |
+ INFINIPATH_HWE_IBCBUSFRSPCPARITYERR;
+
+ infinipath_i_rcvavail_mask = INFINIPATH_I_RCVAVAIL_MASK;
+ infinipath_i_rcvurg_mask = INFINIPATH_I_RCVURG_MASK;
+}
+
+/**
+ * ipath_ht_init_hwerrors - enable hardware errors
+ * @dd: the infinipath device
+ *
+ * now that we have finished initializing everything that might reasonably
+ * cause a hardware error, and cleared those errors bits as they occur,
+ * we can enable hardware errors in the mask (potentially enabling
+ * freeze mode), and enable hardware errors as errors (along with
+ * everything else) in errormask
+ */
+static void ipath_ht_init_hwerrors(struct ipath_devdata *dd)
+{
+ ipath_err_t val;
+ u64 extsval;
+
+ extsval = ipath_read_kreg64(dd, dd->ipath_kregs->kr_extstatus);
+
+ if (!(extsval & INFINIPATH_EXTS_MEMBIST_ENDTEST))
+ ipath_dev_err(dd, "MemBIST did not complete!\n");
+
+ ipath_check_htlink(dd);
+
+ /* barring bugs, all hwerrors become interrupts, which can */
+ val = -1LL;
+ /* don't look at crc lane1 if 8 bit */
+ if (dd->ipath_flags & IPATH_8BIT_IN_HT0)
+ val &= ~infinipath_hwe_htclnkabyte1crcerr;
+ /* don't look at crc lane1 if 8 bit */
+ if (dd->ipath_flags & IPATH_8BIT_IN_HT1)
+ val &= ~infinipath_hwe_htclnkbbyte1crcerr;
+
+ /*
+ * disable RXDSYNCMEMPARITY because external serdes is unused,
+ * and therefore the logic will never be used or initialized,
+ * and uninitialized state will normally result in this error
+ * being asserted. Similarly for the external serdess pll
+ * lock signal.
+ */
+ val &= ~(INFINIPATH_HWE_SERDESPLLFAILED |
+ INFINIPATH_HWE_RXDSYNCMEMPARITYERR);
+
+ /*
+ * Disable MISCERR4 because of an inversion in the HT core
+ * logic checking for errors that cause this bit to be set.
+ * The errata can also cause the protocol error bit to be set
+ * in the HT config space linkerror register(s).
+ */
+ val &= ~INFINIPATH_HWE_HTCMISCERR4;
+
+ /*
+ * PLL ignored because MDIO interface has a logic problem
+ * for reads, on Comstock and Ponderosa. BRINGUP
+ */
+ if (dd->ipath_boardrev == 4 || dd->ipath_boardrev == 9)
+ val &= ~INFINIPATH_HWE_SERDESPLLFAILED;
+ dd->ipath_hwerrmask = val;
+}
+
+/**
+ * ipath_ht_bringup_serdes - bring up the serdes
+ * @dd: the infinipath device
+ */
+static int ipath_ht_bringup_serdes(struct ipath_devdata *dd)
+{
+ u64 val, config1;
+ int ret = 0, change = 0;
+
+ ipath_dbg("Trying to bringup serdes\n");
+
+ if (ipath_read_kreg64(dd, dd->ipath_kregs->kr_hwerrstatus) &
+ INFINIPATH_HWE_SERDESPLLFAILED)
+ {
+ ipath_dbg("At start, serdes PLL failed bit set in "
+ "hwerrstatus, clearing and continuing\n");
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrclear,
+ INFINIPATH_HWE_SERDESPLLFAILED);
+ }
+
+ val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig0);
+ config1 = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig1);
+
+ ipath_cdbg(VERBOSE, "Initial serdes status is config0=%llx config1=%llx, sstatus=%llx xgxs %llx\n",
+ (unsigned long long) val, (unsigned long long) config1, (unsigned long long) ipath_read_kreg64(dd,
+ dd->ipath_kregs->kr_serdesstatus),
+ (unsigned long long) ipath_read_kreg64(dd, dd->ipath_kregs->kr_xgxsconfig));
+
+ /* force reset on */
+ val |=
+ INFINIPATH_SERDC0_RESET_PLL /* | INFINIPATH_SERDC0_RESET_MASK */ ;
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0, val);
+ udelay(15); /* need pll reset set at least for a bit */
+
+ if (val & INFINIPATH_SERDC0_RESET_PLL) {
+ u64 val2 = val &= ~INFINIPATH_SERDC0_RESET_PLL;
+ /* set lane resets, and tx idle, during pll reset */
+ val2 |= INFINIPATH_SERDC0_RESET_MASK | INFINIPATH_SERDC0_TXIDLE;
+ ipath_cdbg(VERBOSE, "Clearing serdes PLL reset (writing "
+ "%llx)\n", (unsigned long long) val2);
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0, val2);
+ /*
+ * be sure chip saw it
+ */
+ val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch);
+ /*
+ * need pll reset clear at least 11 usec before lane
+ * resets cleared; give it a few more
+ */
+ udelay(15);
+ val = val2; /* for check below */
+ }
+
+ if (val & (INFINIPATH_SERDC0_RESET_PLL | INFINIPATH_SERDC0_RESET_MASK
+ | INFINIPATH_SERDC0_TXIDLE)) {
+ val &=
+ ~(INFINIPATH_SERDC0_RESET_PLL | INFINIPATH_SERDC0_RESET_MASK
+ | INFINIPATH_SERDC0_TXIDLE);
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0, val); /* clear them */
+ }
+
+ val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_xgxsconfig);
+ if (((val >> INFINIPATH_XGXS_MDIOADDR_SHIFT) &
+ INFINIPATH_XGXS_MDIOADDR_MASK) != 3) {
+ val &=
+ ~(INFINIPATH_XGXS_MDIOADDR_MASK <<
+ INFINIPATH_XGXS_MDIOADDR_SHIFT);
+ /*
+ * we use address 3
+ */
+ val |= 3ULL << INFINIPATH_XGXS_MDIOADDR_SHIFT;
+ change = 1;
+ }
+ if (val & INFINIPATH_XGXS_RESET) { /* normally true after boot */
+ val &= ~INFINIPATH_XGXS_RESET;
+ change = 1;
+ }
+ if (change)
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_xgxsconfig, val);
+
+ val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig0);
+
+ config1 &= ~0x0ffffffff00ULL; /* clear current and de-emphasis bits */
+ config1 |= 0x00000000000ULL; /* set current to 20ma */
+ config1 |= 0x0cccc000000ULL; /* set de-emphasis to -5.68dB */
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig1, config1);
+
+ ipath_cdbg(VERBOSE, "After setup: serdes status is config0=%llx config1=%llx, sstatus=%llx xgxs %llx\n",
+ (unsigned long long) val, (unsigned long long) config1, (unsigned long long) ipath_read_kreg64(dd,
+ dd->ipath_kregs->kr_serdesstatus),
+ (unsigned long long) ipath_read_kreg64(dd, dd->ipath_kregs->kr_xgxsconfig));
+
+ if ((!ipath_waitfor_mdio_cmdready(dd))) {
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_mdio,
+ ipath_mdio_req(IPATH_MDIO_CMD_READ,
+ 31,
+ IPATH_MDIO_CTRL_XGXS_REG_8,
+ 0));
+ if (ipath_waitfor_complete(dd, dd->ipath_kregs->kr_mdio,
+ IPATH_MDIO_DATAVALID, &val))
+ ipath_dbg("Never got MDIO data for XGXS status read\n");
+ else
+ ipath_cdbg(VERBOSE, "MDIO Read reg8, 'bank' 31 %x\n",
+ (u32) val);
+ } else
+ ipath_dbg("Never got MDIO cmdready for XGXS status read\n");
+
+ return ret; /* for now, say we always succeeded */
+}
+
+/**
+ * ipath_ht_quiet_serdes - set serdes to txidle
+ * @dd: the infinipath device
+ * driver is being unloaded
+ */
+static void ipath_ht_quiet_serdes(struct ipath_devdata *dd)
+{
+ u64 val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig0);
+
+ val |= INFINIPATH_SERDC0_TXIDLE;
+ ipath_dbg("Setting TxIdleEn on serdes (config0 = %llx)\n",
+ (unsigned long long) val);
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0, val);
+}
+
+static int ipath_ht_intconfig(struct ipath_devdata *dd)
+{
+ if (!dd->ipath_intconfig) {
+ ipath_dev_err(dd, "No interrupts enabled, couldn't setup "
+ "interrupt address\n");
+ return 1;
+ }
+
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_interruptconfig,
+ dd->ipath_intconfig); /* interrupt address */
+ return 0;
+}
+
+/**
+ * ipath_pe_put_tid - write a TID in chip
+ * @dd: the infinipath device
+ * @tidptr: pointer to the expected TID (in chip) to udpate
+ * @tidtype: 0 for eager, 1 for expected
+ * @pa: physical address of in memory buffer; ipath_tidinvalid if freeing
+ *
+ * This exists as a separate routine to allow for special locking etc.
+ * It's used for both the full cleanup on exit, as well as the normal
+ * setup and teardown.
+ */
+static void ipath_ht_put_tid(struct ipath_devdata *dd,
+ u64 __iomem *tidptr, u32 type,
+ unsigned long pa)
+{
+ if (pa != dd->ipath_tidinvalid) {
+ if (unlikely((pa & ~INFINIPATH_RT_ADDR_MASK))) {
+ dev_info(&dd->pcidev->dev,
+ "physaddr %lx has more than "
+ "40 bits, using only 40!!!\n", pa);
+ pa &= INFINIPATH_RT_ADDR_MASK;
+ }
+ if (type == 0)
+ pa |= dd->ipath_tidtemplate;
+ else {
+ /* in words (fixed, full page). */
+ u64 lenvalid = PAGE_SIZE >> 2;
+ lenvalid <<= INFINIPATH_RT_BUFSIZE_SHIFT;
+ pa |= lenvalid | INFINIPATH_RT_VALID;
+ }
+ }
+ ipath_write_memq(dd, tidptr, pa);
+}
+
+/**
+ * ipath_ht_clear_tid - clear all TID entries for a port, expected and eager
+ * @dd: the infinipath device
+ * @port: the port
+ *
+ * Used from ipath_close(), and at chip initialization.
+ */
+static void ipath_ht_clear_tids(struct ipath_devdata *dd, unsigned port)
+{
+ u64 __iomem *tidbase;
+ int i;
+
+ if (!dd->ipath_kregbase)
+ return;
+
+ ipath_cdbg(VERBOSE, "Invalidate TIDs for port %u\n", port);
+
+ /*
+ * need to invalidate all of the expected TID entries for this
+ * port, so we don't have valid entries that might somehow get
+ * used (early in next use of this port, or through some bug)
+ */
+ tidbase = (u64 __iomem *) ((char __iomem *)(dd->ipath_kregbase) +
+ dd->ipath_rcvtidbase +
+ port * dd->ipath_rcvtidcnt *
+ sizeof(*tidbase));
+ for (i = 0; i < dd->ipath_rcvtidcnt; i++)
+ ipath_ht_put_tid(dd, &tidbase[i], 1, dd->ipath_tidinvalid);
+
+ tidbase = (u64 __iomem *) ((char __iomem *)(dd->ipath_kregbase) +
+ dd->ipath_rcvegrbase +
+ port * dd->ipath_rcvegrcnt *
+ sizeof(*tidbase));
+
+ for (i = 0; i < dd->ipath_rcvegrcnt; i++)
+ ipath_ht_put_tid(dd, &tidbase[i], 0, dd->ipath_tidinvalid);
+}
+
+/**
+ * ipath_ht_tidtemplate - setup constants for TID updates
+ * @dd: the infinipath device
+ *
+ * We setup stuff that we use a lot, to avoid calculating each time
+ */
+static void ipath_ht_tidtemplate(struct ipath_devdata *dd)
+{
+ dd->ipath_tidtemplate = dd->ipath_ibmaxlen >> 2;
+ dd->ipath_tidtemplate <<= INFINIPATH_RT_BUFSIZE_SHIFT;
+ dd->ipath_tidtemplate |= INFINIPATH_RT_VALID;
+
+ /*
+ * work around chip errata bug 7358, by marking invalid tids
+ * as having max length
+ */
+ dd->ipath_tidinvalid = (-1LL & INFINIPATH_RT_BUFSIZE_MASK) <<
+ INFINIPATH_RT_BUFSIZE_SHIFT;
+}
+
+static int ipath_ht_early_init(struct ipath_devdata *dd)
+{
+ u32 __iomem *piobuf;
+ u32 pioincr, val32, egrsize;
+ int i;
+
+ /*
+ * one cache line; long IB headers will spill over into received
+ * buffer
+ */
+ dd->ipath_rcvhdrentsize = 16;
+ dd->ipath_rcvhdrsize = IPATH_DFLT_RCVHDRSIZE;
+
+ /*
+ * For HT-400, we allocate a somewhat overly large eager buffer,
+ * such that we can guarantee that we can receive the largest
+ * packet that we can send out. To truly support a 4KB MTU,
+ * we need to bump this to a large value. To date, other than
+ * testing, we have never encountered an HCA that can really
+ * send 4KB MTU packets, so we do not handle that (we'll get
+ * errors interrupts if we ever see one).
+ */
+ dd->ipath_rcvegrbufsize = dd->ipath_piosize2k;
+ egrsize = dd->ipath_rcvegrbufsize;
+
+ /*
+ * the min() check here is currently a nop, but it may not
+ * always be, depending on just how we do ipath_rcvegrbufsize
+ */
+ dd->ipath_ibmaxlen = min(dd->ipath_piosize2k, dd->ipath_rcvegrbufsize);
+ dd->ipath_init_ibmaxlen = dd->ipath_ibmaxlen;
+ ipath_ht_tidtemplate(dd);
+
+ /*
+ * zero all the TID entries at startup. We do this for sanity,
+ * in case of a previous driver crash of some kind, and also
+ * because the chip powers up with these memories in an unknown
+ * state. Use portcnt, not cfgports, since this is for the
+ * full chip, not for current (possibly different) configuration
+ * value.
+ * Chip Errata bug 6447
+ */
+ for (val32 = 0; val32 < dd->ipath_portcnt; val32++)
+ ipath_ht_clear_tids(dd, val32);
+
+ /*
+ * write the pbc of each buffer, to be sure it's initialized, then
+ * cancel all the buffers, and also abort any packets that might
+ * have been in flight for some reason (the latter is for driver
+ * unload/reload, but isn't a bad idea at first init). PIO send
+ * isn't enabled at this point, so there is no danger of sending
+ * these out on the wire.
+ * Chip Errata bug 6610
+ */
+ piobuf = (u32 __iomem *) (((char __iomem *)(dd->ipath_kregbase)) +
+ dd->ipath_piobufbase);
+ pioincr = dd->ipath_palign / sizeof(*piobuf);
+ for (i = 0; i < dd->ipath_piobcnt2k; i++) {
+ /*
+ * reasonable word count, just to init pbc
+ */
+ writel(16, piobuf);
+ piobuf += pioincr;
+ }
+ /*
+ * self-clearing
+ */
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, INFINIPATH_S_ABORT);
+ return 0;
+}
+
+/**
+ * ipath_init_ht_get_base_info - set chip-specific flags for user code
+ * @dd: the infinipath device
+ * @kbase: ipath_base_info pointer
+ * We set the PCIE flag because the lower bandwidth on PCIe vs HyperTransport
+ * can affect some user packet algorithims.
+*/
+static int ipath_ht_get_base_info(struct ipath_portdata *pd, void *kbase)
+{
+ struct ipath_base_info *kinfo = kbase;
+
+ kinfo->spi_runtime_flags |= IPATH_RUNTIME_HT |
+ IPATH_RUNTIME_RCVHDR_COPY;
+
+ return 0;
+}
+
+/**
+ * ipath_init_ht400_funcs - set up the chip-specific function pointers
+ * @dd: the infinipath device
+ *
+ * This is global, and is called directly at init to set up the
+ * chip-specific function pointers for later use.
+ */
+void ipath_init_ht400_funcs(struct ipath_devdata *dd)
+{
+ dd->ipath_f_intrsetup = ipath_ht_intconfig;
+ dd->ipath_f_bus = ipath_setup_ht_config;
+ dd->ipath_f_reset = ipath_setup_ht_reset;
+ dd->ipath_f_get_boardname = ipath_ht_boardname;
+ dd->ipath_f_init_hwerrors = ipath_ht_init_hwerrors;
+ dd->ipath_f_init_hwerrors = ipath_ht_init_hwerrors;
+ dd->ipath_f_early_init = ipath_ht_early_init;
+ dd->ipath_f_handle_hwerrors = ipath_ht_handle_hwerrors;
+ dd->ipath_f_quiet_serdes = ipath_ht_quiet_serdes;
+ dd->ipath_f_bringup_serdes = ipath_ht_bringup_serdes;
+ dd->ipath_f_clear_tids = ipath_ht_clear_tids;
+ dd->ipath_f_put_tid = ipath_ht_put_tid;
+ dd->ipath_f_cleanup = ipath_setup_ht_cleanup;
+ dd->ipath_f_setextled = ipath_setup_ht_setextled;
+ dd->ipath_f_get_base_info = ipath_ht_get_base_info;
+
+ /*
+ * initialize chip-specific variables
+ */
+ dd->ipath_f_tidtemplate = ipath_ht_tidtemplate;
+
+ /*
+ * setup the register offsets, since they are different for each
+ * chip
+ */
+ dd->ipath_kregs = &ipath_ht_kregs;
+ dd->ipath_cregs = &ipath_ht_cregs;
+
+ /*
+ * do very early init that is needed before ipath_f_bus is
+ * called
+ */
+ ipath_init_ht_variables();
+}
+
+EXPORT_SYMBOL_GPL(ipath_get_unit_name);
^ permalink raw reply [flat|nested] 70+ messages in thread* [PATCH 5 of 20] ipath - support for PCI Express devices
2006-03-10 0:35 [PATCH 0 of 20] [RFC] ipath driver - another round for review Bryan O'Sullivan
` (3 preceding siblings ...)
2006-03-10 0:35 ` [PATCH 4 of 20] ipath - support for HyperTransport devices Bryan O'Sullivan
@ 2006-03-10 0:35 ` Bryan O'Sullivan
2006-03-10 0:35 ` [PATCH 6 of 20] ipath - chip initialisation code Bryan O'Sullivan
` (15 subsequent siblings)
20 siblings, 0 replies; 70+ messages in thread
From: Bryan O'Sullivan @ 2006-03-10 0:35 UTC (permalink / raw)
To: rolandd, gregkh, akpm, davem; +Cc: linux-kernel, openib-general
This file contains PCIE-specific routines and definitions. It is not
compiled unless the kernel has PCI Express support.
Signed-off-by: Bryan O'Sullivan <bos@pathscale.com>
diff -r f6fb63439323 -r 6955d1da1172 drivers/infiniband/hw/ipath/ipath_pe800.c
--- /dev/null Thu Jan 1 00:00:00 1970 +0000
+++ b/drivers/infiniband/hw/ipath/ipath_pe800.c Thu Mar 9 16:15:36 2006 -0800
@@ -0,0 +1,1205 @@
+/*
+ * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+/*
+ * This file contains all of the code that is specific to the
+ * InfiniPath PE-800 chip.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+
+
+#include "ipath_kernel.h"
+#include "ipath_registers.h"
+
+/*
+ * This file contains all the chip-specific register information and
+ * access functions for the PathScale PE800, the PCI-Express chip.
+ *
+ * This lists the InfiniPath PE800 registers, in the actual chip layout.
+ * This structure should never be directly accessed.
+ */
+struct _infinipath_do_not_use_kernel_regs {
+ unsigned long long Revision;
+ unsigned long long Control;
+ unsigned long long PageAlign;
+ unsigned long long PortCnt;
+ unsigned long long DebugPortSelect;
+ unsigned long long Reserved0;
+ unsigned long long SendRegBase;
+ unsigned long long UserRegBase;
+ unsigned long long CounterRegBase;
+ unsigned long long Scratch;
+ unsigned long long Reserved1;
+ unsigned long long Reserved2;
+ unsigned long long IntBlocked;
+ unsigned long long IntMask;
+ unsigned long long IntStatus;
+ unsigned long long IntClear;
+ unsigned long long ErrorMask;
+ unsigned long long ErrorStatus;
+ unsigned long long ErrorClear;
+ unsigned long long HwErrMask;
+ unsigned long long HwErrStatus;
+ unsigned long long HwErrClear;
+ unsigned long long HwDiagCtrl;
+ unsigned long long MDIO;
+ unsigned long long IBCStatus;
+ unsigned long long IBCCtrl;
+ unsigned long long ExtStatus;
+ unsigned long long ExtCtrl;
+ unsigned long long GPIOOut;
+ unsigned long long GPIOMask;
+ unsigned long long GPIOStatus;
+ unsigned long long GPIOClear;
+ unsigned long long RcvCtrl;
+ unsigned long long RcvBTHQP;
+ unsigned long long RcvHdrSize;
+ unsigned long long RcvHdrCnt;
+ unsigned long long RcvHdrEntSize;
+ unsigned long long RcvTIDBase;
+ unsigned long long RcvTIDCnt;
+ unsigned long long RcvEgrBase;
+ unsigned long long RcvEgrCnt;
+ unsigned long long RcvBufBase;
+ unsigned long long RcvBufSize;
+ unsigned long long RxIntMemBase;
+ unsigned long long RxIntMemSize;
+ unsigned long long RcvPartitionKey;
+ unsigned long long Reserved3;
+ unsigned long long RcvPktLEDCnt;
+ unsigned long long Reserved4[8];
+ unsigned long long SendCtrl;
+ unsigned long long SendPIOBufBase;
+ unsigned long long SendPIOSize;
+ unsigned long long SendPIOBufCnt;
+ unsigned long long SendPIOAvailAddr;
+ unsigned long long TxIntMemBase;
+ unsigned long long TxIntMemSize;
+ unsigned long long Reserved5;
+ unsigned long long PCIeRBufTestReg0;
+ unsigned long long PCIeRBufTestReg1;
+ unsigned long long Reserved51[6];
+ unsigned long long SendBufferError;
+ unsigned long long SendBufferErrorCONT1;
+ unsigned long long Reserved6SBE[6];
+ unsigned long long RcvHdrAddr0;
+ unsigned long long RcvHdrAddr1;
+ unsigned long long RcvHdrAddr2;
+ unsigned long long RcvHdrAddr3;
+ unsigned long long RcvHdrAddr4;
+ unsigned long long Reserved7RHA[11];
+ unsigned long long RcvHdrTailAddr0;
+ unsigned long long RcvHdrTailAddr1;
+ unsigned long long RcvHdrTailAddr2;
+ unsigned long long RcvHdrTailAddr3;
+ unsigned long long RcvHdrTailAddr4;
+ unsigned long long Reserved8RHTA[11];
+ unsigned long long Reserved9SW[8];
+ unsigned long long SerdesConfig0;
+ unsigned long long SerdesConfig1;
+ unsigned long long SerdesStatus;
+ unsigned long long XGXSConfig;
+ unsigned long long IBPLLCfg;
+ unsigned long long Reserved10SW2[3];
+ unsigned long long PCIEQ0SerdesConfig0;
+ unsigned long long PCIEQ0SerdesConfig1;
+ unsigned long long PCIEQ0SerdesStatus;
+ unsigned long long Reserved11;
+ unsigned long long PCIEQ1SerdesConfig0;
+ unsigned long long PCIEQ1SerdesConfig1;
+ unsigned long long PCIEQ1SerdesStatus;
+ unsigned long long Reserved12;
+};
+
+#define IPATH_KREG_OFFSET(field) (offsetof(struct \
+ _infinipath_do_not_use_kernel_regs, field) / sizeof(u64))
+#define IPATH_CREG_OFFSET(field) (offsetof( \
+ struct infinipath_counters, field) / sizeof(u64))
+
+static const struct ipath_kregs ipath_pe_kregs = {
+ .kr_control = IPATH_KREG_OFFSET(Control),
+ .kr_counterregbase = IPATH_KREG_OFFSET(CounterRegBase),
+ .kr_debugportselect = IPATH_KREG_OFFSET(DebugPortSelect),
+ .kr_errorclear = IPATH_KREG_OFFSET(ErrorClear),
+ .kr_errormask = IPATH_KREG_OFFSET(ErrorMask),
+ .kr_errorstatus = IPATH_KREG_OFFSET(ErrorStatus),
+ .kr_extctrl = IPATH_KREG_OFFSET(ExtCtrl),
+ .kr_extstatus = IPATH_KREG_OFFSET(ExtStatus),
+ .kr_gpio_clear = IPATH_KREG_OFFSET(GPIOClear),
+ .kr_gpio_mask = IPATH_KREG_OFFSET(GPIOMask),
+ .kr_gpio_out = IPATH_KREG_OFFSET(GPIOOut),
+ .kr_gpio_status = IPATH_KREG_OFFSET(GPIOStatus),
+ .kr_hwdiagctrl = IPATH_KREG_OFFSET(HwDiagCtrl),
+ .kr_hwerrclear = IPATH_KREG_OFFSET(HwErrClear),
+ .kr_hwerrmask = IPATH_KREG_OFFSET(HwErrMask),
+ .kr_hwerrstatus = IPATH_KREG_OFFSET(HwErrStatus),
+ .kr_ibcctrl = IPATH_KREG_OFFSET(IBCCtrl),
+ .kr_ibcstatus = IPATH_KREG_OFFSET(IBCStatus),
+ .kr_intblocked = IPATH_KREG_OFFSET(IntBlocked),
+ .kr_intclear = IPATH_KREG_OFFSET(IntClear),
+ .kr_intmask = IPATH_KREG_OFFSET(IntMask),
+ .kr_intstatus = IPATH_KREG_OFFSET(IntStatus),
+ .kr_mdio = IPATH_KREG_OFFSET(MDIO),
+ .kr_pagealign = IPATH_KREG_OFFSET(PageAlign),
+ .kr_partitionkey = IPATH_KREG_OFFSET(RcvPartitionKey),
+ .kr_portcnt = IPATH_KREG_OFFSET(PortCnt),
+ .kr_rcvbthqp = IPATH_KREG_OFFSET(RcvBTHQP),
+ .kr_rcvbufbase = IPATH_KREG_OFFSET(RcvBufBase),
+ .kr_rcvbufsize = IPATH_KREG_OFFSET(RcvBufSize),
+ .kr_rcvctrl = IPATH_KREG_OFFSET(RcvCtrl),
+ .kr_rcvegrbase = IPATH_KREG_OFFSET(RcvEgrBase),
+ .kr_rcvegrcnt = IPATH_KREG_OFFSET(RcvEgrCnt),
+ .kr_rcvhdrcnt = IPATH_KREG_OFFSET(RcvHdrCnt),
+ .kr_rcvhdrentsize = IPATH_KREG_OFFSET(RcvHdrEntSize),
+ .kr_rcvhdrsize = IPATH_KREG_OFFSET(RcvHdrSize),
+ .kr_rcvintmembase = IPATH_KREG_OFFSET(RxIntMemBase),
+ .kr_rcvintmemsize = IPATH_KREG_OFFSET(RxIntMemSize),
+ .kr_rcvtidbase = IPATH_KREG_OFFSET(RcvTIDBase),
+ .kr_rcvtidcnt = IPATH_KREG_OFFSET(RcvTIDCnt),
+ .kr_revision = IPATH_KREG_OFFSET(Revision),
+ .kr_scratch = IPATH_KREG_OFFSET(Scratch),
+ .kr_sendbuffererror = IPATH_KREG_OFFSET(SendBufferError),
+ .kr_sendctrl = IPATH_KREG_OFFSET(SendCtrl),
+ .kr_sendpioavailaddr = IPATH_KREG_OFFSET(SendPIOAvailAddr),
+ .kr_sendpiobufbase = IPATH_KREG_OFFSET(SendPIOBufBase),
+ .kr_sendpiobufcnt = IPATH_KREG_OFFSET(SendPIOBufCnt),
+ .kr_sendpiosize = IPATH_KREG_OFFSET(SendPIOSize),
+ .kr_sendregbase = IPATH_KREG_OFFSET(SendRegBase),
+ .kr_txintmembase = IPATH_KREG_OFFSET(TxIntMemBase),
+ .kr_txintmemsize = IPATH_KREG_OFFSET(TxIntMemSize),
+ .kr_userregbase = IPATH_KREG_OFFSET(UserRegBase),
+ .kr_serdesconfig0 = IPATH_KREG_OFFSET(SerdesConfig0),
+ .kr_serdesconfig1 = IPATH_KREG_OFFSET(SerdesConfig1),
+ .kr_serdesstatus = IPATH_KREG_OFFSET(SerdesStatus),
+ .kr_xgxsconfig = IPATH_KREG_OFFSET(XGXSConfig),
+ .kr_ibpllcfg = IPATH_KREG_OFFSET(IBPLLCfg),
+
+ /*
+ * These should not be used directly via ipath_read_kreg64(),
+ * use them with ipath_read_kreg64_port()
+ */
+ .kr_rcvhdraddr = IPATH_KREG_OFFSET(RcvHdrAddr0),
+ .kr_rcvhdrtailaddr = IPATH_KREG_OFFSET(RcvHdrTailAddr0),
+
+ /* This group is pe-800-specific; and used only in this file */
+ /* The rcvpktled register controls one of the debug port signals, so
+ * a packet activity LED can be connected to it. */
+ .kr_rcvpktledcnt = IPATH_KREG_OFFSET(RcvPktLEDCnt),
+ .kr_pcierbuftestreg0 = IPATH_KREG_OFFSET(PCIeRBufTestReg0),
+ .kr_pcierbuftestreg1 = IPATH_KREG_OFFSET(PCIeRBufTestReg1),
+ .kr_pcieq0serdesconfig0 = IPATH_KREG_OFFSET(PCIEQ0SerdesConfig0),
+ .kr_pcieq0serdesconfig1 = IPATH_KREG_OFFSET(PCIEQ0SerdesConfig1),
+ .kr_pcieq0serdesstatus = IPATH_KREG_OFFSET(PCIEQ0SerdesStatus),
+ .kr_pcieq1serdesconfig0 = IPATH_KREG_OFFSET(PCIEQ1SerdesConfig0),
+ .kr_pcieq1serdesconfig1 = IPATH_KREG_OFFSET(PCIEQ1SerdesConfig1),
+ .kr_pcieq1serdesstatus = IPATH_KREG_OFFSET(PCIEQ1SerdesStatus)
+};
+
+static const struct ipath_cregs ipath_pe_cregs = {
+ .cr_badformatcnt = IPATH_CREG_OFFSET(RxBadFormatCnt),
+ .cr_erricrccnt = IPATH_CREG_OFFSET(RxICRCErrCnt),
+ .cr_errlinkcnt = IPATH_CREG_OFFSET(RxLinkProblemCnt),
+ .cr_errlpcrccnt = IPATH_CREG_OFFSET(RxLPCRCErrCnt),
+ .cr_errpkey = IPATH_CREG_OFFSET(RxPKeyMismatchCnt),
+ .cr_errrcvflowctrlcnt = IPATH_CREG_OFFSET(RxFlowCtrlErrCnt),
+ .cr_err_rlencnt = IPATH_CREG_OFFSET(RxLenErrCnt),
+ .cr_errslencnt = IPATH_CREG_OFFSET(TxLenErrCnt),
+ .cr_errtidfull = IPATH_CREG_OFFSET(RxTIDFullErrCnt),
+ .cr_errtidvalid = IPATH_CREG_OFFSET(RxTIDValidErrCnt),
+ .cr_errvcrccnt = IPATH_CREG_OFFSET(RxVCRCErrCnt),
+ .cr_ibstatuschange = IPATH_CREG_OFFSET(IBStatusChangeCnt),
+ .cr_intcnt = IPATH_CREG_OFFSET(LBIntCnt),
+ .cr_invalidrlencnt = IPATH_CREG_OFFSET(RxMaxMinLenErrCnt),
+ .cr_invalidslencnt = IPATH_CREG_OFFSET(TxMaxMinLenErrCnt),
+ .cr_lbflowstallcnt = IPATH_CREG_OFFSET(LBFlowStallCnt),
+ .cr_pktrcvcnt = IPATH_CREG_OFFSET(RxDataPktCnt),
+ .cr_pktrcvflowctrlcnt = IPATH_CREG_OFFSET(RxFlowPktCnt),
+ .cr_pktsendcnt = IPATH_CREG_OFFSET(TxDataPktCnt),
+ .cr_pktsendflowcnt = IPATH_CREG_OFFSET(TxFlowPktCnt),
+ .cr_portovflcnt = IPATH_CREG_OFFSET(RxP0HdrEgrOvflCnt),
+ .cr_rcvebpcnt = IPATH_CREG_OFFSET(RxEBPCnt),
+ .cr_rcvovflcnt = IPATH_CREG_OFFSET(RxBufOvflCnt),
+ .cr_senddropped = IPATH_CREG_OFFSET(TxDroppedPktCnt),
+ .cr_sendstallcnt = IPATH_CREG_OFFSET(TxFlowStallCnt),
+ .cr_sendunderruncnt = IPATH_CREG_OFFSET(TxUnderrunCnt),
+ .cr_wordrcvcnt = IPATH_CREG_OFFSET(RxDwordCnt),
+ .cr_wordsendcnt = IPATH_CREG_OFFSET(TxDwordCnt),
+ .cr_unsupvlcnt = IPATH_CREG_OFFSET(TxUnsupVLErrCnt),
+ .cr_rxdroppktcnt = IPATH_CREG_OFFSET(RxDroppedPktCnt),
+ .cr_iblinkerrrecovcnt = IPATH_CREG_OFFSET(IBLinkErrRecoveryCnt),
+ .cr_iblinkdowncnt = IPATH_CREG_OFFSET(IBLinkDownedCnt),
+ .cr_ibsymbolerrcnt = IPATH_CREG_OFFSET(IBSymbolErrCnt)
+};
+
+/* kr_intstatus, kr_intclear, kr_intmask bits */
+#define INFINIPATH_I_RCVURG_MASK 0x1F
+#define INFINIPATH_I_RCVAVAIL_MASK 0x1F
+
+/* kr_hwerrclear, kr_hwerrmask, kr_hwerrstatus, bits */
+#define INFINIPATH_HWE_PCIEMEMPARITYERR_MASK 0x000000000000003fULL
+#define INFINIPATH_HWE_PCIEMEMPARITYERR_SHIFT 0
+#define INFINIPATH_HWE_PCIEPOISONEDTLP 0x0000000010000000ULL
+#define INFINIPATH_HWE_PCIECPLTIMEOUT 0x0000000020000000ULL
+#define INFINIPATH_HWE_PCIEBUSPARITYXTLH 0x0000000040000000ULL
+#define INFINIPATH_HWE_PCIEBUSPARITYXADM 0x0000000080000000ULL
+#define INFINIPATH_HWE_PCIEBUSPARITYRADM 0x0000000100000000ULL
+#define INFINIPATH_HWE_MEMBISTFAILED 0x0040000000000000ULL
+#define INFINIPATH_HWE_COREPLL_FBSLIP 0x0080000000000000ULL
+#define INFINIPATH_HWE_COREPLL_RFSLIP 0x0100000000000000ULL
+#define INFINIPATH_HWE_PCIE1PLLFAILED 0x0400000000000000ULL
+#define INFINIPATH_HWE_PCIE0PLLFAILED 0x0800000000000000ULL
+#define INFINIPATH_HWE_SERDESPLLFAILED 0x1000000000000000ULL
+
+/* kr_extstatus bits */
+#define INFINIPATH_EXTS_FREQSEL 0x2
+#define INFINIPATH_EXTS_SERDESSEL 0x4
+#define INFINIPATH_EXTS_MEMBIST_ENDTEST 0x0000000000004000
+#define INFINIPATH_EXTS_MEMBIST_FOUND 0x0000000000008000
+
+#define _IPATH_GPIO_SDA_NUM 1
+#define _IPATH_GPIO_SCL_NUM 0
+
+#define IPATH_GPIO_SDA (1ULL << \
+ (_IPATH_GPIO_SDA_NUM+INFINIPATH_EXTC_GPIOOE_SHIFT))
+#define IPATH_GPIO_SCL (1ULL << \
+ (_IPATH_GPIO_SCL_NUM+INFINIPATH_EXTC_GPIOOE_SHIFT))
+
+/**
+ * ipath_pe_handle_hwerrors - display hardware errors.
+ * @dd: the infinipath device
+ * @msg: the output buffer
+ * @msgl: the size of the output buffer
+ *
+ * Use same msg buffer as regular errors to avoid excessive stack
+ * use. Most hardware errors are catastrophic, but for right now,
+ * we'll print them and continue. We reuse the same message buffer as
+ * ipath_handle_errors() to avoid excessive stack usage.
+ */
+void ipath_pe_handle_hwerrors(struct ipath_devdata *dd, char *msg,
+ size_t msgl)
+{
+ ipath_err_t hwerrs;
+ u32 bits, ctrl;
+ int isfatal = 0;
+ char bitsmsg[64];
+
+ hwerrs = ipath_read_kreg64(dd, dd->ipath_kregs->kr_hwerrstatus);
+ if (!hwerrs) {
+ /*
+ * better than printing cofusing messages
+ * This seems to be related to clearing the crc error, or
+ * the pll error during init.
+ */
+ ipath_cdbg(VERBOSE, "Called but no hardware errors set\n");
+ return;
+ } else if (hwerrs == ~0ULL) {
+ ipath_dev_err(dd,
+ "Read of hardware error status failed (all bits set); ignoring\n");
+ return;
+ }
+ ipath_stats.sps_hwerrs++;
+
+ /* Always clear the error status register, except MEMBISTFAIL,
+ * regardless of whether we continue or stop using the chip.
+ * We want that set so we know it failed, even across driver reload.
+ * We'll still ignore it in the hwerrmask. We do this partly for
+ * diagnostics, but also for support */
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrclear,
+ hwerrs&~INFINIPATH_HWE_MEMBISTFAILED);
+
+ hwerrs &= dd->ipath_hwerrmask;
+
+ /*
+ * make sure we get this much out, unless told to be quiet,
+ * or it's occurred within the last 5 seconds
+ */
+ if ((hwerrs & ~dd->ipath_lasthwerror) ||
+ (ipath_debug & __IPATH_VERBDBG))
+ dev_info(&dd->pcidev->dev, "Hardware error: hwerr=0x%llx (cleared)\n",
+ (unsigned long long) hwerrs);
+ dd->ipath_lasthwerror |= hwerrs;
+
+ if (hwerrs & ~infinipath_hwe_bitsextant)
+ ipath_dev_err(dd,
+ "hwerror interrupt with unknown errors %llx set\n",
+ (unsigned long long) hwerrs & ~infinipath_hwe_bitsextant);
+
+ ctrl = ipath_read_kreg32(dd, dd->ipath_kregs->kr_control);
+ if (ctrl & INFINIPATH_C_FREEZEMODE) {
+ if (hwerrs) {
+ /*
+ * if any set that we aren't ignoring
+ * only make the complaint once, in case it's stuck or
+ * recurring, and we get here multiple times
+ */
+ if (dd->ipath_flags & IPATH_INITTED) {
+ ipath_dev_err(dd,
+ "Fatal Error (freezemode), no longer usable\n");
+ isfatal = 1;
+ }
+ /*
+ * Mark as having had an error for driver, and also for /sys and
+ * status word mapped to user programs. This marks unit as not
+ * usable, until reset
+ */
+ *dd->ipath_statusp &= ~IPATH_STATUS_IB_READY;
+ *dd->ipath_statusp |= IPATH_STATUS_HWERROR;
+ dd->ipath_flags &= ~IPATH_INITTED;
+ } else {
+ ipath_dbg
+ ("Clearing freezemode on ignored hardware error\n");
+ ctrl &= ~INFINIPATH_C_FREEZEMODE;
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_control, ctrl);
+ }
+ }
+
+ *msg = '\0';
+
+ if (hwerrs & INFINIPATH_HWE_MEMBISTFAILED) {
+ strlcat(msg, "[Memory BIST test failed, PE-800 unusable]",
+ msgl);
+ /* ignore from now on, so disable until driver reloaded */
+ *dd->ipath_statusp |= IPATH_STATUS_HWERROR;
+ dd->ipath_hwerrmask &= ~INFINIPATH_HWE_MEMBISTFAILED;
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask,
+ dd->ipath_hwerrmask);
+ }
+ if (hwerrs & (INFINIPATH_HWE_RXEMEMPARITYERR_MASK
+ << INFINIPATH_HWE_RXEMEMPARITYERR_SHIFT)) {
+ bits = (u32) ((hwerrs >>
+ INFINIPATH_HWE_RXEMEMPARITYERR_SHIFT) &
+ INFINIPATH_HWE_RXEMEMPARITYERR_MASK);
+ snprintf(bitsmsg, sizeof bitsmsg, "[RXE Parity Errs %x] ",
+ bits);
+ strlcat(msg, bitsmsg, msgl);
+ }
+ if (hwerrs & (INFINIPATH_HWE_TXEMEMPARITYERR_MASK
+ << INFINIPATH_HWE_TXEMEMPARITYERR_SHIFT)) {
+ bits = (u32) ((hwerrs >>
+ INFINIPATH_HWE_TXEMEMPARITYERR_SHIFT) &
+ INFINIPATH_HWE_TXEMEMPARITYERR_MASK);
+ snprintf(bitsmsg, sizeof bitsmsg, "[TXE Parity Errs %x] ",
+ bits);
+ strlcat(msg, bitsmsg, msgl);
+ }
+ if (hwerrs & (INFINIPATH_HWE_PCIEMEMPARITYERR_MASK
+ << INFINIPATH_HWE_PCIEMEMPARITYERR_SHIFT)) {
+ bits = (u32) ((hwerrs >>
+ INFINIPATH_HWE_PCIEMEMPARITYERR_SHIFT) &
+ INFINIPATH_HWE_PCIEMEMPARITYERR_MASK);
+ snprintf(bitsmsg, sizeof bitsmsg, "[PCIe Mem Parity Errs %x] ",
+ bits);
+ strlcat(msg, bitsmsg, msgl);
+ }
+ if (hwerrs & INFINIPATH_HWE_IBCBUSTOSPCPARITYERR)
+ strlcat(msg, "[IB2IPATH Parity]", msgl);
+ if (hwerrs & INFINIPATH_HWE_IBCBUSFRSPCPARITYERR)
+ strlcat(msg, "[IPATH2IB Parity]", msgl);
+
+#define _IPATH_PLL_FAIL (INFINIPATH_HWE_COREPLL_FBSLIP | \
+ INFINIPATH_HWE_COREPLL_RFSLIP )
+
+ if (hwerrs & _IPATH_PLL_FAIL) {
+ snprintf(bitsmsg, sizeof bitsmsg,
+ "[PLL failed (%llx), PE-800 unusable]",
+ (unsigned long long) hwerrs & _IPATH_PLL_FAIL);
+ strlcat(msg, bitsmsg, msgl);
+ /* ignore from now on, so disable until driver reloaded */
+ dd->ipath_hwerrmask &= ~(hwerrs & _IPATH_PLL_FAIL);
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask,
+ dd->ipath_hwerrmask);
+ }
+
+ if (hwerrs & INFINIPATH_HWE_SERDESPLLFAILED) {
+ /*
+ * If it occurs, it is left masked since the eternal interface
+ * is unused
+ */
+ dd->ipath_hwerrmask &= ~INFINIPATH_HWE_SERDESPLLFAILED;
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask,
+ dd->ipath_hwerrmask);
+ }
+
+ if (hwerrs & INFINIPATH_HWE_PCIEPOISONEDTLP)
+ strlcat(msg, "[PCIe Poisoned TLP]", msgl);
+ if (hwerrs & INFINIPATH_HWE_PCIECPLTIMEOUT)
+ strlcat(msg, "[PCIe completion timeout]", msgl);
+
+ /* in practice, it's unlikely wthat we'll see PCIe PLL, or bus parity or
+ * memory parity error failures, because most likely we won't be able
+ * to talk to the core of the chip. Nonetheless, we might see them,
+ * if they are in parts of the PCIe core that aren't essential */
+ if (hwerrs & INFINIPATH_HWE_PCIE1PLLFAILED)
+ strlcat(msg, "[PCIePLL1]", msgl);
+ if (hwerrs & INFINIPATH_HWE_PCIE0PLLFAILED)
+ strlcat(msg, "[PCIePLL0]", msgl);
+ if (hwerrs & INFINIPATH_HWE_PCIEBUSPARITYXTLH)
+ strlcat(msg, "[PCIe XTLH core parity]", msgl);
+ if (hwerrs & INFINIPATH_HWE_PCIEBUSPARITYXADM)
+ strlcat(msg, "[PCIe ADM TX core parity]", msgl);
+ if (hwerrs & INFINIPATH_HWE_PCIEBUSPARITYRADM)
+ strlcat(msg, "[PCIe ADM RX core parity]", msgl);
+
+ if (hwerrs & INFINIPATH_HWE_RXDSYNCMEMPARITYERR)
+ strlcat(msg, "[Rx Dsync]", msgl);
+ if (hwerrs & INFINIPATH_HWE_SERDESPLLFAILED)
+ strlcat(msg, "[SerDes PLL]", msgl);
+
+ ipath_dev_err(dd, "%s hardware error\n", msg);
+ if (isfatal && (!ipath_diag_alive)) {
+ if (dd->ipath_freezemsg) {
+ /*
+ * for /sys status file ; if no trailing } is copied, we'll know
+ * it was truncated.
+ */
+ snprintf(dd->ipath_freezemsg,
+ dd->ipath_freezelen, "{%s}", msg);
+ }
+ }
+}
+
+/**
+ * ipath_pe_boardname - fill in the board name
+ * @dd: the infinipath device
+ * @name: the output buffer
+ * @namelen: the size of the output buffer
+ *
+ * info is based on the board revision register
+ */
+static int ipath_pe_boardname(struct ipath_devdata *dd, char *name,
+ size_t namelen)
+{
+ char *n = NULL;
+ u8 boardrev = dd->ipath_boardrev;
+
+ switch (boardrev) {
+ case 0:
+ n = "InfiniPath_Emulation";
+ break;
+ case 1:
+ n = "InfiniPath_PE-800-Bringup";
+ break;
+ case 2:
+ n = "InfiniPath_PE-860";
+ break;
+ case 3:
+ n = "InfiniPath_PE-850";
+ break;
+ default:
+ dev_err(&dd->pcidev->dev, "Don't yet know about board with ID %u\n",
+ boardrev);
+ snprintf(name, namelen, "UnknownBoardRev%u", boardrev);
+ break;
+ }
+ if (n)
+ snprintf(name, namelen, "%s", n);
+
+ if (dd->ipath_majrev != 4 || dd->ipath_minrev != 1) {
+ ipath_dev_err(dd, "Unsupported PE-800 revision %u.%u!\n",
+ dd->ipath_majrev, dd->ipath_minrev);
+ return 1;
+ }
+ return 0;
+}
+
+/**
+ * ipath_pe_init_hwerrors - enable hardware errors
+ * @dd: the infinipath device
+ *
+ * now that we have finished initializing everything that might reasonably
+ * cause a hardware error, and cleared those errors bits as they occur,
+ * we can enable hardware errors in the mask (potentially enabling
+ * freeze mode), and enable hardware errors as errors (along with
+ * everything else) in errormask
+ */
+void ipath_pe_init_hwerrors(struct ipath_devdata *dd)
+{
+ ipath_err_t val;
+ u64 extsval;
+
+ extsval = ipath_read_kreg64(dd, dd->ipath_kregs->kr_extstatus);
+
+ if (!(extsval & INFINIPATH_EXTS_MEMBIST_ENDTEST))
+ ipath_dev_err(dd, "MemBIST did not complete!\n");
+
+ val = ~0ULL; /* barring bugs, all hwerrors become interrupts, */
+
+ if (!dd->ipath_boardrev) // no PLL for Emulator
+ val &= ~INFINIPATH_HWE_SERDESPLLFAILED;
+
+ /* workaround bug 9460 in internal interface bus parity checking */
+ val &= ~INFINIPATH_HWE_PCIEBUSPARITYRADM;
+
+ dd->ipath_hwerrmask = val;
+}
+
+/**
+ * ipath_pe_bringup_serdes - bring up the serdes
+ * @dd: the infinipath device
+ */
+int ipath_pe_bringup_serdes(struct ipath_devdata *dd)
+{
+ u64 val, tmp, config1;
+ int ret = 0, change = 0;
+
+ ipath_dbg("Trying to bringup serdes\n");
+
+ if (ipath_read_kreg64(dd, dd->ipath_kregs->kr_hwerrstatus) &
+ INFINIPATH_HWE_SERDESPLLFAILED) {
+ ipath_dbg
+ ("At start, serdes PLL failed bit set in hwerrstatus,"
+ "clearing and continuing\n");
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrclear,
+ INFINIPATH_HWE_SERDESPLLFAILED);
+ }
+
+ val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig0);
+ config1 = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig1);
+
+ ipath_cdbg(VERBOSE,
+ "SerDes status config0=%llx config1=%llx, xgxsconfig %llx\n",
+ (unsigned long long) val, (unsigned long long) config1,
+ (unsigned long long) ipath_read_kreg64(dd,
+ dd->ipath_kregs->kr_xgxsconfig));
+
+ /*
+ * force reset on, also set rxdetect enable. Must do before reading
+ * serdesstatus at least for simulation, or some of the bits in serdes
+ * status will come back as undefined and cause simulation failures
+ */
+ val |= INFINIPATH_SERDC0_RESET_PLL | INFINIPATH_SERDC0_RXDETECT_EN
+ | INFINIPATH_SERDC0_L1PWR_DN;
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0, val);
+ /* be sure chip saw it */
+ tmp = ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch);
+ udelay(5); /* need pll reset set at least for a bit */
+ /*
+ * after PLL is reset, set the per-lane Resets and TxIdle and
+ * clear the PLL reset and rxdetect (to get falling edge).
+ * Leave L1PWR bits set (permanently)
+ */
+ val &= ~(INFINIPATH_SERDC0_RXDETECT_EN | INFINIPATH_SERDC0_RESET_PLL
+ | INFINIPATH_SERDC0_L1PWR_DN);
+ val |= INFINIPATH_SERDC0_RESET_MASK | INFINIPATH_SERDC0_TXIDLE;
+ ipath_cdbg(VERBOSE,
+ "Clearing pll reset and setting lane resets and txidle (%llx)\n",
+ (unsigned long long) val);
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0, val);
+ /* be sure chip saw it */
+ tmp = ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch);
+ /* need PLL reset clear for at least 11 usec before lane
+ * resets cleared; give it a few more to be sure */
+ udelay(15);
+ val &= ~(INFINIPATH_SERDC0_RESET_MASK | INFINIPATH_SERDC0_TXIDLE);
+
+ ipath_cdbg(VERBOSE, "Clearing lane resets and txidle (writing %llx)\n",
+ (unsigned long long) val);
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0, val);
+ /* be sure chip saw it */
+ val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch);
+
+ val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_xgxsconfig);
+ if (((val >> INFINIPATH_XGXS_MDIOADDR_SHIFT) &
+ INFINIPATH_XGXS_MDIOADDR_MASK) != 3) {
+ val &=
+ ~(INFINIPATH_XGXS_MDIOADDR_MASK <<
+ INFINIPATH_XGXS_MDIOADDR_SHIFT);
+ val |= 3ULL << INFINIPATH_XGXS_MDIOADDR_SHIFT; /* MDIO address 3 */
+ change = 1;
+ }
+ if (val & INFINIPATH_XGXS_RESET) {
+ val &= ~INFINIPATH_XGXS_RESET;
+ change = 1;
+ }
+ if (change)
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_xgxsconfig, val);
+
+ val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig0);
+
+ config1 &= ~0x0ffffffff00ULL; /* clear current and de-emphasis bits */
+ config1 |= 0x00000000000ULL; /* set current to 20ma */
+ config1 |= 0x0cccc000000ULL; /* set de-emphasis to -5.68dB */
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig1, config1);
+
+ ipath_cdbg(VERBOSE,
+ "done: SerDes status config0=%llx config1=%llx, sstatus=%llx "
+ "xgxs=%llx\n",
+ (unsigned long long) val, (unsigned long long) config1,
+ (unsigned long long) ipath_read_kreg64(dd,
+ dd->ipath_kregs->kr_serdesstatus),
+ (unsigned long long) ipath_read_kreg64(dd,
+ dd->ipath_kregs->kr_xgxsconfig));
+
+ if ((!ipath_waitfor_mdio_cmdready(dd))) {
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_mdio,
+ ipath_mdio_req(IPATH_MDIO_CMD_READ, 31,
+ IPATH_MDIO_CTRL_XGXS_REG_8, 0));
+ if (ipath_waitfor_complete
+ (dd, dd->ipath_kregs->kr_mdio, IPATH_MDIO_DATAVALID, &val))
+ ipath_dbg("Never got MDIO data for XGXS status read\n");
+ else
+ ipath_cdbg(VERBOSE, "MDIO Read reg8, 'bank' 31 %x\n",
+ (u32) val);
+ } else
+ ipath_dbg("Never got MDIO cmdready for XGXS status read\n");
+
+ return ret;
+}
+
+/**
+ * ipath_pe_quiet_serdes - set serdes to txidle
+ * @dd: the infinipath device
+ * Called when driver is being unloaded
+ */
+void ipath_pe_quiet_serdes(struct ipath_devdata *dd)
+{
+ u64 val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig0);
+
+ val |= INFINIPATH_SERDC0_TXIDLE;
+ ipath_dbg("Setting TxIdleEn on serdes (config0 = %llx)\n",
+ (unsigned long long) val);
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0, val);
+}
+
+/* this is not yet needed on the PE800, so just return 0. */
+static int ipath_pe_intconfig(struct ipath_devdata *dd)
+{
+ return 0;
+}
+
+/**
+ * ipath_setup_pe_setextled - set the state of the two external LEDs
+ * @dd: the infinipath device
+ * @lst: the L state
+ * @ltst: the LT state
+
+ * These LEDs indicate the physical and logical state of IB link.
+ * For this chip (at least with recommended board pinouts), LED1
+ * is Yellow (logical state) and LED2 is Green (physical state),
+ *
+ * Note: We try to match the Mellanox HCA LED behavior as best
+ * we can. Green indicates physical link state is OK (something is
+ * plugged in, and we can train).
+ * Amber indicates the link is logically up (ACTIVE).
+ * Mellanox further blinks the amber LED to indicate data packet
+ * activity, but we have no hardware support for that, so it would
+ * require waking up every 10-20 msecs and checking the counters
+ * on the chip, and then turning the LED off if appropriate. That's
+ * visible overhead, so not something we will do.
+ *
+ */
+static void ipath_setup_pe_setextled(struct ipath_devdata *dd, u64 lst,
+ u64 ltst)
+{
+ u64 extctl;
+
+ /* the diags use the LED to indicate diag info, so we leave
+ * the external LED alone when the diags are running */
+ if (ipath_diag_alive)
+ return;
+
+ extctl = dd->ipath_extctrl & ~(INFINIPATH_EXTC_LED1PRIPORT_ON |
+ INFINIPATH_EXTC_LED2PRIPORT_ON);
+
+ if (ltst & INFINIPATH_IBCS_LT_STATE_LINKUP)
+ extctl |= INFINIPATH_EXTC_LED2PRIPORT_ON;
+ if (lst == INFINIPATH_IBCS_L_STATE_ACTIVE)
+ extctl |= INFINIPATH_EXTC_LED1PRIPORT_ON;
+ dd->ipath_extctrl = extctl;
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_extctrl, extctl);
+}
+
+/**
+ * ipath_setup_pe_cleanup - clean up any per-chip chip-specific stuff
+ * @dd: the infinipath device
+ *
+ * This is called during driver unload.
+ * We do the pci_disable_msi here, not in generic code, because it
+ * isn't used for the HT-400. If we do end up needing pci_enable_msi
+ * at some point in the future for HT-400, we'll move the call back
+ * into the main init_one code.
+ */
+static void ipath_setup_pe_cleanup(struct ipath_devdata *dd)
+{
+ dd->ipath_msi_lo = 0; /* just in case unload fails */
+ pci_disable_msi(dd->pcidev);
+}
+
+/**
+ * ipath_setup_pe_config - setup PCIe config related stuff
+ * @dd: the infinipath device
+ * @pdev: the PCI device
+ *
+ * The pci_enable_msi() call will fail on systems with MSI quirks
+ * such as those with AMD8131, even if the device of interest is not
+ * attached to that device, (in the 2.6.13 - 2.6.15 kernels, at least, fixed
+ * late in 2.6.16).
+ * All that can be done is to edit the kernel source to remove the quirk
+ * check until that is fixed.
+ * We do not need to call enable_msi() for our HyperTransport chip (HT-400),
+ * even those it uses MSI, and we want to avoid the quirk warning, so
+ * So we call enable_msi only for the PE-800. If we do end up needing
+ * pci_enable_msi at some point in the future for HT-400, we'll move the
+ * call back into the main init_one code.
+ * We save the msi lo and hi values, so we can restore them after
+ * chip reset (the kernel PCI infrastructure doesn't yet handle that
+ * correctly).
+ */
+static int ipath_setup_pe_config(struct ipath_devdata *dd,
+ struct pci_dev *pdev)
+{
+ int pos, ret;
+
+ dd->ipath_msi_lo = 0; /* used as a flag during reset processing */
+ ret = pci_enable_msi(dd->pcidev);
+ if (ret)
+ dev_err(&dd->pcidev->dev,
+ "pci_enable_msi failed: %d, interrupts may not work\n",
+ ret);
+ /* continue even if it fails, we may still be OK... */
+
+ if ((pos = pci_find_capability(dd->pcidev, PCI_CAP_ID_MSI))) {
+ u16 control;
+ pci_read_config_dword(dd->pcidev, pos + PCI_MSI_ADDRESS_LO,
+ &dd->ipath_msi_lo);
+ pci_read_config_dword(dd->pcidev, pos + PCI_MSI_ADDRESS_HI,
+ &dd->ipath_msi_hi);
+ pci_read_config_word(dd->pcidev, pos + PCI_MSI_FLAGS, &control);
+ /* now save the data (vector) info */
+ pci_read_config_word(dd->pcidev,
+ pos +
+ ((control & PCI_MSI_FLAGS_64BIT) ? 12 : 8),
+ &dd->ipath_msi_data);
+ ipath_cdbg(VERBOSE,
+ "Read msi data 0x%x from config offset 0x%x, control=0x%x\n",
+ dd->ipath_msi_data,
+ pos + ((control & PCI_MSI_FLAGS_64BIT) ? 12 : 8), control);
+ /* we save the cachelinesize also, although it doesn't really matter */
+ pci_read_config_byte(dd->pcidev, PCI_CACHE_LINE_SIZE,
+ &dd->ipath_pci_cacheline);
+ } else
+ dev_err(&dd->pcidev->dev,
+ "Can't find MSI capability, can't save MSI settings for reset\n");
+ if ((pos = pci_find_capability(dd->pcidev, PCI_CAP_ID_EXP))) {
+ u16 linkstat;
+ pci_read_config_word(dd->pcidev, pos + PCI_EXP_LNKSTA,
+ &linkstat);
+ linkstat >>= 4;
+ linkstat &= 0x1f;
+ if (linkstat != 8)
+ dev_err(&dd->pcidev->dev,
+ "PCIe width %u, performance reduced\n", linkstat);
+ }
+ else
+ dev_err(&dd->pcidev->dev, "Can't find PCI Express capability!\n");
+ return 0;
+}
+
+static void ipath_init_pe_variables(void)
+{
+ /*
+ * bits for selecting i2c direction and values,
+ * used for I2C serial flash
+ */
+ ipath_gpio_sda_num = _IPATH_GPIO_SDA_NUM;
+ ipath_gpio_scl_num = _IPATH_GPIO_SCL_NUM;
+ ipath_gpio_sda = IPATH_GPIO_SDA;
+ ipath_gpio_scl = IPATH_GPIO_SCL;
+
+ /* variables for sanity checking interrupt and errors */
+ infinipath_hwe_bitsextant =
+ (INFINIPATH_HWE_RXEMEMPARITYERR_MASK <<
+ INFINIPATH_HWE_RXEMEMPARITYERR_SHIFT) |
+ (INFINIPATH_HWE_PCIEMEMPARITYERR_MASK <<
+ INFINIPATH_HWE_PCIEMEMPARITYERR_SHIFT) |
+ INFINIPATH_HWE_PCIE1PLLFAILED | INFINIPATH_HWE_PCIE0PLLFAILED |
+ INFINIPATH_HWE_PCIEPOISONEDTLP | INFINIPATH_HWE_PCIECPLTIMEOUT |
+ INFINIPATH_HWE_PCIEBUSPARITYXTLH |
+ INFINIPATH_HWE_PCIEBUSPARITYXADM |
+ INFINIPATH_HWE_PCIEBUSPARITYRADM |
+ INFINIPATH_HWE_MEMBISTFAILED |
+ INFINIPATH_HWE_COREPLL_FBSLIP | INFINIPATH_HWE_COREPLL_RFSLIP |
+ INFINIPATH_HWE_SERDESPLLFAILED |
+ INFINIPATH_HWE_IBCBUSTOSPCPARITYERR |
+ INFINIPATH_HWE_IBCBUSFRSPCPARITYERR;
+ infinipath_i_bitsextant =
+ (INFINIPATH_I_RCVURG_MASK << INFINIPATH_I_RCVURG_SHIFT) |
+ (INFINIPATH_I_RCVAVAIL_MASK << INFINIPATH_I_RCVAVAIL_SHIFT) |
+ INFINIPATH_I_ERROR | INFINIPATH_I_SPIOSENT |
+ INFINIPATH_I_SPIOBUFAVAIL | INFINIPATH_I_GPIO;
+ infinipath_e_bitsextant =
+ INFINIPATH_E_RFORMATERR | INFINIPATH_E_RVCRC | INFINIPATH_E_RICRC |
+ INFINIPATH_E_RMINPKTLEN | INFINIPATH_E_RMAXPKTLEN |
+ INFINIPATH_E_RLONGPKTLEN | INFINIPATH_E_RSHORTPKTLEN |
+ INFINIPATH_E_RUNEXPCHAR | INFINIPATH_E_RUNSUPVL | INFINIPATH_E_REBP
+ | INFINIPATH_E_RIBFLOW | INFINIPATH_E_RBADVERSION |
+ INFINIPATH_E_RRCVEGRFULL | INFINIPATH_E_RRCVHDRFULL |
+ INFINIPATH_E_RBADTID | INFINIPATH_E_RHDRLEN | INFINIPATH_E_RHDR |
+ INFINIPATH_E_RIBLOSTLINK | INFINIPATH_E_SMINPKTLEN |
+ INFINIPATH_E_SMAXPKTLEN | INFINIPATH_E_SUNDERRUN |
+ INFINIPATH_E_SPKTLEN | INFINIPATH_E_SDROPPEDSMPPKT |
+ INFINIPATH_E_SDROPPEDDATAPKT | INFINIPATH_E_SPIOARMLAUNCH |
+ INFINIPATH_E_SUNEXPERRPKTNUM | INFINIPATH_E_SUNSUPVL |
+ INFINIPATH_E_IBSTATUSCHANGED | INFINIPATH_E_INVALIDADDR |
+ INFINIPATH_E_RESET | INFINIPATH_E_HARDWARE;
+
+ infinipath_i_rcvavail_mask = INFINIPATH_I_RCVAVAIL_MASK;
+ infinipath_i_rcvurg_mask = INFINIPATH_I_RCVURG_MASK;
+}
+
+/* setup the MSI stuff again after a reset. I'd like to just call
+ * pci_enable_msi() and request_irq() again, but when I do that,
+ * the MSI enable bit doesn't get set in the command word, and
+ * we switch to to a different interrupt vector, which is confusing,
+ * so I instead just do it all inline. Perhaps somehow can tie this
+ * into the PCIe hotplug support at some point
+ * Note, because I'm doing it all here, I don't call pci_disable_msi()
+ * or free_irq() at the start of ipath_setup_pe_reset().
+ */
+static int ipath_reinit_msi(struct ipath_devdata *dd)
+{
+ int pos;
+ u16 control;
+
+ if (!dd->ipath_msi_lo) {
+ dev_info(&dd->pcidev->dev,
+ "Can't restore MSI configuration, initial setup failed?\n");
+ return 0;
+ }
+
+ if (!(pos = pci_find_capability(dd->pcidev, PCI_CAP_ID_MSI))) {
+ dev_err(&dd->pcidev->dev,
+ "Can't find MSI capability, can't restore MSI settings\n");
+ return 0;
+ }
+ ipath_cdbg(VERBOSE, "Writing msi_lo 0x%x to config offset 0x%x\n",
+ dd->ipath_msi_lo, pos + PCI_MSI_ADDRESS_LO);
+ pci_write_config_dword(dd->pcidev, pos + PCI_MSI_ADDRESS_LO,
+ dd->ipath_msi_lo);
+ ipath_cdbg(VERBOSE, "Writing msi_lo 0x%x to config offset 0x%x\n",
+ dd->ipath_msi_hi, pos + PCI_MSI_ADDRESS_HI);
+ pci_write_config_dword(dd->pcidev, pos + PCI_MSI_ADDRESS_HI,
+ dd->ipath_msi_hi);
+ pci_read_config_word(dd->pcidev, pos + PCI_MSI_FLAGS, &control);
+ if (!(control & PCI_MSI_FLAGS_ENABLE)) {
+ ipath_cdbg(VERBOSE,
+ "MSI control at off %x was %x, setting MSI enable (%x)\n",
+ pos + PCI_MSI_FLAGS, control,
+ control | PCI_MSI_FLAGS_ENABLE);
+ control |= PCI_MSI_FLAGS_ENABLE;
+ pci_write_config_word(dd->pcidev, pos + PCI_MSI_FLAGS, control);
+ }
+ /* now rewrite the data (vector) info */
+ pci_write_config_word(dd->pcidev,
+ pos + ((control & PCI_MSI_FLAGS_64BIT) ? 12 : 8),
+ dd->ipath_msi_data);
+ /* we restore the cachelinesize also, although it doesn't really matter */
+ pci_write_config_byte(dd->pcidev, PCI_CACHE_LINE_SIZE,
+ dd->ipath_pci_cacheline);
+ /* and now set the pci master bit again */
+ pci_set_master(dd->pcidev);
+ return 1;
+}
+
+/* This routine sleeps, so it can only be called from user context, not
+ * from interrupt context. If we need interrupt context, we can split
+ * it into two routines.
+*/
+static int ipath_setup_pe_reset(struct ipath_devdata *dd)
+{
+ u64 val;
+ int i;
+
+ /* Use ERROR so it shows up in logs, etc. */
+ dev_err(&dd->pcidev->dev, "Resetting PE-800 unit %u\n", dd->ipath_unit);
+ val = dd->ipath_control | INFINIPATH_C_RESET;
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_control, val);
+ mb();
+
+ for (i = 1; i <= 5; i++) {
+ int ret;
+ /* allow MBIST, etc. to complete; longer on each retry.
+ * We sometimes get machine checks from bus timeout if no
+ * response, so for now, make it *really* long.
+ */
+ msleep(1000 + (1 + i) * 2000);
+ if ((ret =
+ pci_write_config_dword(dd->pcidev, PCI_BASE_ADDRESS_0,
+ dd->ipath_pcibar0)))
+ dev_err(&dd->pcidev->dev, "rewrite of BAR0 failed: %d\n", ret);
+ if ((ret =
+ pci_write_config_dword(dd->pcidev, PCI_BASE_ADDRESS_1,
+ dd->ipath_pcibar1)))
+ dev_err(&dd->pcidev->dev, "rewrite of BAR1 failed: %d\n", ret);
+ /* now re-enable memory access */
+ if ((ret = pci_enable_device(dd->pcidev)))
+ dev_err(&dd->pcidev->dev,
+ "pci_enable_device failed after reset: %d\n", ret);
+ val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_revision);
+ if (val == dd->ipath_revision) {
+ ipath_cdbg(VERBOSE,
+ "Got matching revision register %llx on try %d\n",
+ (unsigned long long) val, i);
+ return ipath_reinit_msi(dd);
+ }
+ /* Probably getting -1 back */
+ ipath_dbg
+ ("Didn't get expected revision register, got %llx, try %d\n",
+ (unsigned long long) val, i + 1);
+ }
+
+ return 0; /* failed */
+}
+
+/**
+ * ipath_pe_put_tid - write a TID in chip
+ * @dd: the infinipath device
+ * @tidptr: pointer to the expected TID (in chip) to udpate
+ * @tidtype: 0 for eager, 1 for expected
+ * @pa: physical address of in memory buffer; ipath_tidinvalid if freeing
+ *
+ * This exists as a separate routine to allow for special locking etc.
+ * It's used for both the full cleanup on exit, as well as the normal
+ * setup and teardown.
+ */
+static void ipath_pe_put_tid(struct ipath_devdata *dd, u64 __iomem *tidptr,
+ u32 type, unsigned long pa)
+{
+ u32 __iomem *tidp32 = (u32 __iomem *)tidptr;
+ unsigned long flags = 0; /* keep gcc quiet */
+
+ if (pa != dd->ipath_tidinvalid) {
+ if (pa & ((1U << 11) - 1)) {
+ dev_info(&dd->pcidev->dev, "BUG: physaddr %lx "
+ "not 4KB aligned!\n", pa);
+ return;
+ }
+ pa >>= 11;
+ /* paranoia check */
+ if (pa & (7<<29))
+ ipath_dev_err(dd,
+ "BUG: Physical page address 0x%lx "
+ "has bits set in 31-29\n", pa);
+
+ if (type == 0)
+ pa |= dd->ipath_tidtemplate;
+ else /* for now, always full 4KB page */
+ pa |= 2 << 29;
+ }
+
+ /* workaround chip bug 9437 by writing each TID twice
+ * and holding a spinlock around the writes, so they don't
+ * intermix with other TID (eager or expected) writes
+ * Unfortunately, this call can be done from interrupt level
+ * for the port 0 eager TIDs, so we have to use irqsave
+ */
+ spin_lock_irqsave(&dd->ipath_tid_lock, flags);
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_scratch, 0xfeeddeaf);
+ ipath_write_meml(dd, tidp32, pa);
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_scratch, 0xdeadbeef);
+ spin_unlock_irqrestore(&dd->ipath_tid_lock, flags);
+}
+
+/**
+ * ipath_pe_clear_tid - clear all TID entries for a port, expected and eager
+ * @dd: the infinipath device
+ * @port: the port
+ *
+ * clear all TID entries for a port, expected and eager.
+ * Used from ipath_close(). On PE800, TIDs are only 32 bits,
+ * not 64, but they are still on 64 bit boundaries, so tidbase
+ * is declared as u64 * for the pointer math, even though we write 32 bits
+ */
+static void ipath_pe_clear_tids(struct ipath_devdata *dd, unsigned port)
+{
+ u64 __iomem *tidbase;
+ unsigned long tidinv;
+ int i;
+
+ if (!dd->ipath_kregbase)
+ return;
+
+ ipath_cdbg(VERBOSE, "Invalidate TIDs for port %u\n", port);
+
+ tidinv = dd->ipath_tidinvalid;
+ tidbase = (u64 __iomem *) ((char __iomem *)(dd->ipath_kregbase) +
+ dd->ipath_rcvtidbase +
+ port * dd->ipath_rcvtidcnt * sizeof(*tidbase));
+
+ for (i = 0; i < dd->ipath_rcvtidcnt; i++)
+ ipath_pe_put_tid(dd, &tidbase[i], 0, tidinv);
+
+ tidbase = (u64 __iomem *) ((char __iomem *)(dd->ipath_kregbase) +
+ dd->ipath_rcvegrbase +
+ port * dd->ipath_rcvegrcnt * sizeof(*tidbase));
+
+ for (i = 0; i < dd->ipath_rcvegrcnt; i++)
+ ipath_pe_put_tid(dd, &tidbase[i], 1, tidinv);
+}
+
+/**
+ * ipath_pe_tidtemplate - setup constants for TID updates
+ * @dd: the infinipath device
+ *
+ * We setup stuff that we use a lot, to avoid calculating each time
+ */
+static void ipath_pe_tidtemplate(struct ipath_devdata *dd)
+{
+ u32 egrsize = dd->ipath_rcvegrbufsize;
+
+ /* For now, we always allocate 4KB buffers (at init)
+ * so we can receive max size packets. We may
+ * want a module parameter to specify 2KB or 4KB
+ * and/or make be per port instead of per device
+ * for those who want to reduce memory footprint.
+ * Note that the ipath_rcvhdrentsize size must
+ * be large enough to hold the largest IB header
+ * (currently 96 bytes) that we expect to handle
+ * (plus of course the 2 dwords of RHF).
+ */
+ if (egrsize == 2048)
+ dd->ipath_tidtemplate = 1U << 29;
+ else if (egrsize == 4096)
+ dd->ipath_tidtemplate = 2U << 29;
+ else {
+ egrsize = 4096;
+ dev_info(&dd->pcidev->dev, "BUG: unsupported egrbufsize %u, using %u\n",
+ dd->ipath_rcvegrbufsize, egrsize);
+ dd->ipath_tidtemplate = 2U << 29;
+ }
+ dd->ipath_tidinvalid = 0;
+}
+
+static int ipath_pe_early_init(struct ipath_devdata *dd)
+{
+ dd->ipath_flags |= IPATH_4BYTE_TID;
+
+ /* for openib, we need to be able to handle an IB header of 96 bytes
+ * or 24 dwords.
+ * HT-400 has arbitrary sized receive buffers, so we made them the
+ * same size as the PIO buffers. The PE-800 does not handle
+ * arbitrary size buffers, so we need the header large enough to
+ * handle largest IB header, but still have room for a 2KB MTU
+ * standard IB packet.
+ */
+ dd->ipath_rcvhdrentsize = 24;
+ dd->ipath_rcvhdrsize = IPATH_DFLT_RCVHDRSIZE;
+
+ /* For HT-400, we allocate a somewhat overly large eager buffer, such
+ * that we can guarantee that we can receive the largest packet that
+ * we can send out. To truly support a 4KB MTU, we need to bump this
+ * to a larger value. We'll do this when I get around to testing 4KB
+ * sends on the PE-800, which I have not yet done.
+ */
+ dd->ipath_rcvegrbufsize = 2048;
+ /* the min() check here is currently a nop, but it may not always be,
+ * depending on just how we do ipath_rcvegrbufsize
+ */
+ dd->ipath_ibmaxlen = min(dd->ipath_piosize2k,
+ dd->ipath_rcvegrbufsize +
+ (dd->ipath_rcvhdrentsize << 2));
+ dd->ipath_init_ibmaxlen = dd->ipath_ibmaxlen;
+
+ /*
+ * For PE-800, we can request a receive interrupt for 1 or
+ * more packets from current offset. For now, we set this
+ * up for a single packet, to match the HT-400 behavior.
+ */
+ dd->ipath_rhdrhead_intr_off = 1ULL<<32;
+
+ return 0;
+}
+
+int __attribute__((weak)) ipath_unordered_wc(void)
+{
+ return 0;
+}
+
+/**
+ * ipath_init_pe_get_base_info - set chip-specific flags for user code
+ * @dd: the infinipath device
+ * @kbase: ipath_base_info pointer
+ * We set the PCIE flag because the lower bandwidth on PCIe vs HyperTransport
+ * can affect some user packet algorithims.
+*/
+static int ipath_pe_get_base_info(struct ipath_portdata *pd, void *kbase)
+{
+ struct ipath_base_info *kinfo = kbase;
+
+ if (ipath_unordered_wc()) {
+ kinfo->spi_runtime_flags |= IPATH_RUNTIME_FORCE_WC_ORDER;
+ ipath_cdbg(PROC, "Intel processor, forcing WC order\n");
+ }
+ else
+ ipath_cdbg(PROC, "Not Intel processor, WC ordered\n");
+
+ kinfo->spi_runtime_flags |= IPATH_RUNTIME_PCIE;
+
+ return 0;
+}
+
+/**
+ * ipath_init_pe800_funcs - set up the chip-specific function pointers
+ * @dd: the infinipath device
+ *
+ * This is global, and is called directly at init to set up the
+ * chip-specific function pointers for later use.
+ */
+void ipath_init_pe800_funcs(struct ipath_devdata *dd)
+{
+ dd->ipath_f_intrsetup = ipath_pe_intconfig;
+ dd->ipath_f_bus = ipath_setup_pe_config;
+ dd->ipath_f_reset = ipath_setup_pe_reset;
+ dd->ipath_f_get_boardname = ipath_pe_boardname;
+ dd->ipath_f_init_hwerrors = ipath_pe_init_hwerrors;
+ dd->ipath_f_early_init = ipath_pe_early_init;
+ dd->ipath_f_handle_hwerrors = ipath_pe_handle_hwerrors;
+ dd->ipath_f_quiet_serdes = ipath_pe_quiet_serdes;
+ dd->ipath_f_bringup_serdes = ipath_pe_bringup_serdes;
+ dd->ipath_f_clear_tids = ipath_pe_clear_tids;
+ dd->ipath_f_put_tid = ipath_pe_put_tid;
+ dd->ipath_f_cleanup = ipath_setup_pe_cleanup;
+ dd->ipath_f_setextled = ipath_setup_pe_setextled;
+ dd->ipath_f_get_base_info = ipath_pe_get_base_info;
+
+ /* initialize chip-specific variables */
+ dd->ipath_f_tidtemplate = ipath_pe_tidtemplate;
+
+ /* setup the register offsets, since they are different for each chip */
+ dd->ipath_kregs = &ipath_pe_kregs;
+ dd->ipath_cregs = &ipath_pe_cregs;
+
+ ipath_init_pe_variables();
+}
+
^ permalink raw reply [flat|nested] 70+ messages in thread* [PATCH 6 of 20] ipath - chip initialisation code
2006-03-10 0:35 [PATCH 0 of 20] [RFC] ipath driver - another round for review Bryan O'Sullivan
` (4 preceding siblings ...)
2006-03-10 0:35 ` [PATCH 5 of 20] ipath - support for PCI Express devices Bryan O'Sullivan
@ 2006-03-10 0:35 ` Bryan O'Sullivan
2006-03-10 0:35 ` [PATCH 7 of 20] ipath - misc driver support code Bryan O'Sullivan
` (14 subsequent siblings)
20 siblings, 0 replies; 70+ messages in thread
From: Bryan O'Sullivan @ 2006-03-10 0:35 UTC (permalink / raw)
To: rolandd, gregkh, akpm, davem; +Cc: linux-kernel, openib-general
Signed-off-by: Bryan O'Sullivan <bos@pathscale.com>
diff -r 6955d1da1172 -r 696ba12283f4 drivers/infiniband/hw/ipath/ipath_init_chip.c
--- /dev/null Thu Jan 1 00:00:00 1970 +0000
+++ b/drivers/infiniband/hw/ipath/ipath_init_chip.c Thu Mar 9 16:15:43 2006 -0800
@@ -0,0 +1,957 @@
+/*
+ * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/pci.h>
+#include <linux/netdevice.h>
+#include <linux/vmalloc.h>
+
+#include "ipath_kernel.h"
+#include "ips_common.h"
+
+/*
+ * min buffers we want to have per port, after driver
+ */
+#define IPATH_MIN_USER_PORT_BUFCNT 8
+
+/*
+ * Number of ports we are configured to use (to allow for more pio
+ * buffers per port, etc.) Zero means use chip value.
+ */
+static ushort ipath_cfgports;
+
+module_param_named(cfgports, ipath_cfgports, ushort, S_IRUGO);
+MODULE_PARM_DESC(cfgports, "Set max number of ports to use");
+
+/*
+ * Number of buffers reserved for driver (layered drivers and SMA
+ * send). Reserved at end of buffer list.
+ */
+static ushort ipath_kpiobufs = 32;
+
+static int ipath_set_kpiobufs(const char *val, struct kernel_param *kp);
+
+module_param_call(kpiobufs, ipath_set_kpiobufs, param_get_uint,
+ &ipath_kpiobufs, S_IWUSR | S_IRUGO);
+MODULE_PARM_DESC(kpiobufs, "Set number of PIO buffers for driver");
+
+/**
+ * create_port0_egr - allocate the eager TID buffers
+ * @dd: the infinipath device
+ *
+ * This code is now quite different for user and kernel, because
+ * the kernel uses skb's, for the accelerated network performance.
+ * This is the kernel (port0) version.
+ *
+ * Allocate the eager TID buffers and program them into infinipath.
+ * We use the network layer alloc_skb() allocator to allocate the
+ * memory, and either use the buffers as is for things like SMA
+ * packets, or pass the buffers up to the ipath layered driver and
+ * thence the network layer, replacing them as we do so (see
+ * ipath_rcv_layer()).
+ */
+static int create_port0_egr(struct ipath_devdata *dd)
+{
+ unsigned e, egrcnt;
+ struct sk_buff **skbs;
+
+ egrcnt = dd->ipath_rcvegrcnt;
+
+ skbs = vmalloc(sizeof(*dd->ipath_port0_skbs) * egrcnt);
+ if (skbs == NULL) {
+ ipath_dev_err(dd, "allocation error for eager TID "
+ "skb array\n");
+ return -ENOMEM;
+ }
+ for (e = 0; e < egrcnt; e++) {
+ /*
+ * This is a bit tricky in that we allocate extra
+ * space for 2 bytes of the 14 byte ethernet header.
+ * These two bytes are passed in the ipath header so
+ * the rest of the data is word aligned. We allocate
+ * 4 bytes so that the data buffer stays word aligned.
+ * See ipath_kreceive() for more details.
+ */
+ skbs[e] = ipath_alloc_skb(dd, GFP_KERNEL);
+ if (!skbs[e]) {
+ ipath_dev_err(dd, "SKB allocation error for "
+ "eager TID %u\n", e);
+ while (e != 0)
+ dev_kfree_skb(skbs[--e]);
+ return -ENOMEM;
+ }
+ }
+ /*
+ * After loop above, so we can test non-NULL to see if ready
+ * to use at receive, etc.
+ */
+ dd->ipath_port0_skbs = skbs;
+
+ for (e = 0; e < egrcnt; e++)
+ dd->ipath_f_put_tid(dd, e + (u64 __iomem *)
+ ((char __iomem *) dd->ipath_kregbase
+ + dd->ipath_rcvegrbase), 0,
+ virt_to_phys(dd->ipath_port0_skbs[e]->data));
+
+ return 0;
+}
+
+static int bringup_link(struct ipath_devdata *dd)
+{
+ u64 val, ibc;
+ int ret = 0;
+
+ dd->ipath_control &= ~INFINIPATH_C_LINKENABLE; /* hold IBC in reset */
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_control, dd->ipath_control);
+
+ /*
+ * Note that prior to try 14 or 15 of IB, the credit scaling
+ * wasn't working, because it was swapped for writes with the
+ * 1 bit default linkstate field
+ */
+
+ /* ignore pbc and align word */
+ val = dd->ipath_piosize2k - 2 * sizeof(u32);
+ /*
+ * for ICRC, which we only send in diag test pkt mode, and we
+ * don't need to worry about that for mtu
+ */
+ val += 1;
+ /*
+ * Set the IBC maxpktlength to the size of our pio buffers the
+ * maxpktlength is in words. This is *not* the IB data MTU.
+ */
+ ibc = (val / sizeof(u32)) << INFINIPATH_IBCC_MAXPKTLEN_SHIFT;
+ ibc |= 0x5ULL << INFINIPATH_IBCC_FLOWCTRLWATERMARK_SHIFT; /* in KB */
+ /*
+ * How often flowctrl sent. More or less in usecs; balance
+ * against watermark value, so that in theory senders always
+ * get a flow control update in time to not let the IB link go
+ * idle.
+ */
+ ibc |= 0x3ULL << INFINIPATH_IBCC_FLOWCTRLPERIOD_SHIFT;
+ /* max error tolerance */
+ ibc |= 0xfULL << INFINIPATH_IBCC_PHYERRTHRESHOLD_SHIFT;
+ /* use "real" buffer space for */
+ ibc |= 4ULL << INFINIPATH_IBCC_CREDITSCALE_SHIFT;
+ /* IB credit flow control. */
+ ibc |= 0xfULL << INFINIPATH_IBCC_OVERRUNTHRESHOLD_SHIFT;
+ /* initially come up waiting for TS1, without sending anything. */
+ dd->ipath_ibcctrl = ibc;
+ /*
+ * Want to start out with both LINKCMD and LINKINITCMD in NOP
+ * (0 and 0). Don't put linkinitcmd in ipath_ibcctrl, want that
+ * to stay a NOP
+ */
+ ibc |= INFINIPATH_IBCC_LINKINITCMD_DISABLE <<
+ INFINIPATH_IBCC_LINKINITCMD_SHIFT;
+ ipath_cdbg(VERBOSE, "Writing 0x%llx to ibcctrl\n",
+ (unsigned long long) ibc);
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_ibcctrl, ibc);
+
+ // be sure chip saw it
+ val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch);
+
+ ret = dd->ipath_f_bringup_serdes(dd);
+
+ if (ret)
+ dev_info(&dd->pcidev->dev, "Could not initialize SerDes, not "
+ "usable\n");
+ else {
+ dd->ipath_control |= INFINIPATH_C_LINKENABLE; /* enable IBC */
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_control,
+ dd->ipath_control);
+ }
+
+ return ret;
+}
+
+static int init_chip_first(struct ipath_devdata *dd,
+ struct ipath_portdata **pdp)
+{
+ struct ipath_portdata *pd = NULL;
+ int ret = 0;
+ u64 val;
+
+ /*
+ * skip cfgports stuff because we are not allocating memory,
+ * and we don't want problems if the portcnt changed due to
+ * cfgports. We do still check and report a difference, if
+ * not same (should be impossible).
+ */
+ dd->ipath_portcnt =
+ ipath_read_kreg32(dd, dd->ipath_kregs->kr_portcnt);
+ if (!ipath_cfgports)
+ dd->ipath_cfgports = dd->ipath_portcnt;
+ else if (ipath_cfgports <= dd->ipath_portcnt) {
+ dd->ipath_cfgports = ipath_cfgports;
+ ipath_dbg("Configured to use %u ports out of %u in chip\n",
+ dd->ipath_cfgports, dd->ipath_portcnt);
+ } else {
+ dd->ipath_cfgports = dd->ipath_portcnt;
+ ipath_dbg("Tried to configured to use %u ports; chip "
+ "only supports %u\n", ipath_cfgports,
+ dd->ipath_portcnt);
+ }
+ dd->ipath_pd = kzalloc(sizeof(*dd->ipath_pd) * dd->ipath_cfgports,
+ GFP_KERNEL);
+
+ if (!dd->ipath_pd) {
+ ipath_dev_err(dd, "Unable to allocate portdata array, "
+ "failing\n");
+ ret = -ENOMEM;
+ goto done;
+ }
+
+ dd->ipath_lastegrheads = kzalloc(sizeof(*dd->ipath_lastegrheads)
+ * dd->ipath_cfgports,
+ GFP_KERNEL);
+ dd->ipath_lastrcvhdrqtails =
+ kzalloc(sizeof(*dd->ipath_lastrcvhdrqtails)
+ * dd->ipath_cfgports, GFP_KERNEL);
+
+ if (!dd->ipath_lastegrheads || !dd->ipath_lastrcvhdrqtails) {
+ ipath_dev_err(dd, "Unable to allocate head arrays, "
+ "failing\n");
+ ret = -ENOMEM;
+ goto done;
+ }
+
+ dd->ipath_pd[0] = kzalloc(sizeof(*pd), GFP_KERNEL);
+
+ if (!dd->ipath_pd[0]) {
+ ipath_dev_err(dd, "Unable to allocate portdata for port "
+ "0, failing\n");
+ ret = -ENOMEM;
+ goto done;
+ }
+ pd = dd->ipath_pd[0];
+ pd->port_dd = dd;
+ pd->port_port = 0;
+ pd->port_cnt = 1;
+ /* The port 0 pkey table is used by the layer interface. */
+ pd->port_pkeys[0] = IPS_DEFAULT_P_KEY;
+ dd->ipath_rcvtidcnt =
+ ipath_read_kreg32(dd, dd->ipath_kregs->kr_rcvtidcnt);
+ dd->ipath_rcvtidbase =
+ ipath_read_kreg32(dd, dd->ipath_kregs->kr_rcvtidbase);
+ dd->ipath_rcvegrcnt =
+ ipath_read_kreg32(dd, dd->ipath_kregs->kr_rcvegrcnt);
+ dd->ipath_rcvegrbase =
+ ipath_read_kreg32(dd, dd->ipath_kregs->kr_rcvegrbase);
+ dd->ipath_palign =
+ ipath_read_kreg32(dd, dd->ipath_kregs->kr_pagealign);
+ dd->ipath_piobufbase =
+ ipath_read_kreg64(dd, dd->ipath_kregs->kr_sendpiobufbase);
+ val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_sendpiosize);
+ dd->ipath_piosize2k = val & ~0U;
+ dd->ipath_piosize4k = val >> 32;
+ dd->ipath_ibmtu = 4096; /* default to largest legal MTU */
+ val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_sendpiobufcnt);
+ dd->ipath_piobcnt2k = val & ~0U;
+ dd->ipath_piobcnt4k = val >> 32;
+ dd->ipath_pio2kbase =
+ (u32 __iomem *) (((char __iomem *) dd->ipath_kregbase) +
+ (dd->ipath_piobufbase & 0xffffffff));
+ if (dd->ipath_piobcnt4k) {
+ dd->ipath_pio4kbase =
+ (u32 __iomem *) (((char __iomem *)dd->ipath_kregbase) +
+ (dd->ipath_piobufbase >> 32));
+ /*
+ * 4K buffers take 2 pages; we use roundup just to be
+ * paranoid; we calculate it once here, rather than on
+ * ever buf allocate
+ */
+ dd->ipath_4kalign = ALIGN(dd->ipath_piosize4k,
+ dd->ipath_palign);
+ ipath_dbg("%u 2k(%x) piobufs @ %p, %u 4k(%x) @ %p "
+ "(%x aligned)\n",
+ dd->ipath_piobcnt2k, dd->ipath_piosize2k,
+ dd->ipath_pio2kbase, dd->ipath_piobcnt4k,
+ dd->ipath_piosize4k, dd->ipath_pio4kbase,
+ dd->ipath_4kalign);
+ }
+ else ipath_dbg("%u 2k piobufs @ %p\n",
+ dd->ipath_piobcnt2k, dd->ipath_pio2kbase);
+
+ spin_lock_init(&dd->ipath_tid_lock);
+
+done:
+ *pdp = pd;
+ return ret;
+}
+
+/**
+ * init_chip_reset - reset the chip
+ * @dd: the infinipath device
+ * @pdp: output for port data
+ *
+ * sanity check at least some of the values after reset, and
+ * ensure no receive or transmit (explictly, in case reset
+ * failed
+ */
+static int init_chip_reset(struct ipath_devdata *dd,
+ struct ipath_portdata **pdp)
+{
+ struct ipath_portdata *pd;
+ u32 rtmp;
+
+ *pdp = pd = dd->ipath_pd[0];
+ /* ensure chip does no sends or receives while we re-initialize */
+ dd->ipath_control = dd->ipath_sendctrl = dd->ipath_rcvctrl = 0U;
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, 0);
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, 0);
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_control, 0);
+
+ rtmp = ipath_read_kreg32(dd, dd->ipath_kregs->kr_portcnt);
+ if (dd->ipath_portcnt != rtmp)
+ dev_info(&dd->pcidev->dev, "portcnt was %u before "
+ "reset, now %u, using original\n",
+ dd->ipath_portcnt, rtmp);
+ rtmp = ipath_read_kreg32(dd, dd->ipath_kregs->kr_rcvtidcnt);
+ if (rtmp != dd->ipath_rcvtidcnt)
+ dev_info(&dd->pcidev->dev, "tidcnt was %u before "
+ "reset, now %u, using original\n",
+ dd->ipath_rcvtidcnt, rtmp);
+ rtmp = ipath_read_kreg32(dd, dd->ipath_kregs->kr_rcvtidbase);
+ if (rtmp != dd->ipath_rcvtidbase)
+ dev_info(&dd->pcidev->dev, "tidbase was %u before "
+ "reset, now %u, using original\n",
+ dd->ipath_rcvtidbase, rtmp);
+ rtmp = ipath_read_kreg32(dd, dd->ipath_kregs->kr_rcvegrcnt);
+ if (rtmp != dd->ipath_rcvegrcnt)
+ dev_info(&dd->pcidev->dev, "egrcnt was %u before "
+ "reset, now %u, using original\n",
+ dd->ipath_rcvegrcnt, rtmp);
+ rtmp = ipath_read_kreg32(dd, dd->ipath_kregs->kr_rcvegrbase);
+ if (rtmp != dd->ipath_rcvegrbase)
+ dev_info(&dd->pcidev->dev, "egrbase was %u before "
+ "reset, now %u, using original\n",
+ dd->ipath_rcvegrbase, rtmp);
+
+ return 0;
+}
+
+static int init_pioavailregs(struct ipath_devdata *dd)
+{
+ dma_addr_t dma_addr;
+ u64 val;
+ int ret = 0;
+
+ /*
+ * this has to be page aligned, and on a page of it's own, so we
+ * can map it into user space. We also use it to give processes
+ * a copy of ipath_statusp, on a separate cacheline, followed by
+ * a copy of the freeze error string, if it's happened.
+ * Might also use that space for other things.
+ */
+ val = ALIGN(2 * L1_CACHE_BYTES + sizeof(*dd->ipath_statusp) +
+ dd->ipath_pioavregs * sizeof(u64),
+ 2 * PAGE_SIZE);
+ dd->ipath_pioavailregs_size = val * sizeof(u64);
+ dd->__ipath_pioavailregs_base =
+ pci_alloc_consistent(dd->pcidev, dd->ipath_pioavailregs_size,
+ &dma_addr);
+ if (!dd->__ipath_pioavailregs_base) {
+ ipath_dev_err(dd, "failed to allocate PIOavail reg area "
+ "in memory\n");
+ ret = -ENOMEM;
+ goto done;
+ }
+ if (((unsigned long) dd->__ipath_pioavailregs_base) & (PAGE_SIZE - 1))
+ dd->ipath_pioavailregs_dma = (__le64 *)
+ ALIGN((unsigned long) dd->__ipath_pioavailregs_base,
+ PAGE_SIZE);
+ else
+ dd->ipath_pioavailregs_dma = dd->__ipath_pioavailregs_base;
+ /* stash physical address for user progs */
+ dd->ipath_pioavailregs_phys = dma_addr;
+
+ /*
+ * we really want L2 cache aligned, but for current CPUs of
+ * interest, they are the same.
+ */
+ dd->ipath_statusp =
+ (u64 *) ((char *)dd->ipath_pioavailregs_dma +
+ ((2 * L1_CACHE_BYTES +
+ dd->ipath_pioavregs *
+ sizeof(u64)) & ~L1_CACHE_BYTES));
+ /* copy the current value now that it's really allocated */
+ *dd->ipath_statusp = dd->_ipath_status;
+ /*
+ * setup buffer to hold freeze msg, accessible to apps,
+ * following statusp
+ */
+ dd->ipath_freezemsg = (char *)&dd->ipath_statusp[1];
+ /* and its length */
+ dd->ipath_freezelen = L1_CACHE_BYTES - sizeof(dd->ipath_statusp[0]);
+
+ if (dd->ipath_unit * 64 > (IPATH_PORT0_RCVHDRTAIL_SIZE - 64)) {
+ ipath_dev_err(dd, "unit %u too large for port 0 "
+ "rcvhdrtail buffer size\n", dd->ipath_unit);
+ ret = -ENODEV;
+ }
+
+ /* so we can get current tail in ipath_kreceive(), per chip */
+ dd->ipath_hdrqtailptr = &ipath_port0_rcvhdrtail[
+ dd->ipath_unit * (64 / sizeof(*ipath_port0_rcvhdrtail))];
+done:
+ return ret;
+}
+
+/**
+ * init_shadow_tids - allocate the shadow TID array
+ * @dd: the infinipath device
+ *
+ * allocate the shadow TID array, so we can ipath_munlock previous
+ * entries. It may make more sense to move the pageshadow to the
+ * port data structure, so we only allocate memory for ports actually
+ * in use, since we at 8k per port, now.
+ */
+static void init_shadow_tids(struct ipath_devdata *dd)
+{
+ dd->ipath_pageshadow = (struct page **)
+ vmalloc(dd->ipath_cfgports * dd->ipath_rcvtidcnt *
+ sizeof(struct page *));
+ if (!dd->ipath_pageshadow)
+ ipath_dev_err(dd, "failed to allocate shadow page * "
+ "array, no expected sends!\n");
+ else
+ memset(dd->ipath_pageshadow, 0,
+ dd->ipath_cfgports * dd->ipath_rcvtidcnt *
+ sizeof(struct page *));
+}
+
+static void enable_chip(struct ipath_devdata *dd,
+ struct ipath_portdata *pd, int reinit)
+{
+ u32 val;
+ int i;
+
+ if (!reinit) {
+ init_waitqueue_head(&ipath_sma_wait);
+ init_waitqueue_head(&ipath_sma_state_wait);
+ }
+
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl,
+ dd->ipath_rcvctrl);
+
+ /* Enable PIO send, and update of PIOavail regs to memory. */
+ dd->ipath_sendctrl = INFINIPATH_S_PIOENABLE |
+ INFINIPATH_S_PIOBUFAVAILUPD;
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl,
+ dd->ipath_sendctrl);
+
+ /*
+ * enable port 0 receive, and receive interrupt. other ports
+ * done as user opens and inits them.
+ */
+ dd->ipath_rcvctrl = INFINIPATH_R_TAILUPD |
+ (1ULL << INFINIPATH_R_PORTENABLE_SHIFT) |
+ (1ULL << INFINIPATH_R_INTRAVAIL_SHIFT);
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl,
+ dd->ipath_rcvctrl);
+
+ /*
+ * now ready for use. this should be cleared whenever we
+ * detect a reset, or initiate one.
+ */
+ dd->ipath_flags |= IPATH_INITTED;
+
+ /*
+ * init our shadow copies of head from tail values, and write
+ * head values to match.
+ */
+ val = ipath_read_ureg32(dd, ur_rcvegrindextail, 0);
+ (void)ipath_write_ureg(dd, ur_rcvegrindexhead, val, 0);
+ dd->ipath_port0head = ipath_read_ureg32(dd, ur_rcvhdrtail, 0);
+
+ /* Initialize so we interrupt on next packet received */
+ (void)ipath_write_ureg(dd, ur_rcvhdrhead,
+ dd->ipath_rhdrhead_intr_off
+ | dd->ipath_port0head, 0);
+
+ /*
+ * by now pioavail updates to memory should have occurred, so
+ * copy them into our working/shadow registers; this is in
+ * case something went wrong with abort, but mostly to get the
+ * initial values of the generation bit correct.
+ */
+ for (i = 0; i < dd->ipath_pioavregs; i++) {
+ /* Chip Errata bug 6641; even and odd qwords>3 are swapped */
+ if (i > 3) {
+ if (i & 1)
+ dd->ipath_pioavailshadow[i] =
+ __le64_to_cpu(dd->ipath_pioavailregs_dma[i - 1]);
+ else
+ dd->ipath_pioavailshadow[i] =
+ __le64_to_cpu(dd->ipath_pioavailregs_dma[i + 1]);
+ } else
+ dd->ipath_pioavailshadow[i] =
+ __le64_to_cpu(dd->ipath_pioavailregs_dma[i]);
+ }
+ /* can get counters, stats, etc. */
+ dd->ipath_flags |= IPATH_PRESENT;
+}
+
+static int init_housekeeping(struct ipath_devdata *dd,
+ struct ipath_portdata **pdp, int reinit)
+{
+ char boardn[32];
+ int ret = 0;
+
+ /*
+ * have to clear shadow copies of registers at init that are
+ * not otherwise set here, or all kinds of bizarre things
+ * happen with driver on chip reset
+ */
+ dd->ipath_rcvhdrsize = 0;
+
+ /*
+ * Don't clear ipath_flags as 8bit mode was set before
+ * entering this func. However, we do set the linkstate to
+ * unknown, so we can watch for a transition.
+ */
+ dd->ipath_flags |= IPATH_LINKUNK;
+ dd->ipath_flags &= ~(IPATH_LINKACTIVE | IPATH_LINKARMED |
+ IPATH_LINKDOWN | IPATH_LINKINIT);
+
+ ipath_cdbg(VERBOSE, "Try to read spc chip revision\n");
+ dd->ipath_revision =
+ ipath_read_kreg64(dd, dd->ipath_kregs->kr_revision);
+
+ /*
+ * set up fundamental info we need to use the chip; we assume
+ * if the revision reg and these regs are OK, we don't need to
+ * special case the rest
+ */
+ dd->ipath_sregbase =
+ ipath_read_kreg32(dd, dd->ipath_kregs->kr_sendregbase);
+ dd->ipath_cregbase =
+ ipath_read_kreg32(dd, dd->ipath_kregs->kr_counterregbase);
+ dd->ipath_uregbase =
+ ipath_read_kreg32(dd, dd->ipath_kregs->kr_userregbase);
+ ipath_cdbg(VERBOSE, "ipath_kregbase %p, sendbase %x usrbase %x, "
+ "cntrbase %x\n", dd->ipath_kregbase, dd->ipath_sregbase,
+ dd->ipath_uregbase, dd->ipath_cregbase);
+ if ((dd->ipath_revision & 0xffffffff) == 0xffffffff
+ || (dd->ipath_sregbase & 0xffffffff) == 0xffffffff
+ || (dd->ipath_cregbase & 0xffffffff) == 0xffffffff
+ || (dd->ipath_uregbase & 0xffffffff) == 0xffffffff) {
+ ipath_dev_err(dd, "Register read failures from chip, "
+ "giving up initialization\n");
+ ret = -ENODEV;
+ goto done;
+ }
+
+ /* clear the initial reset flag, in case first driver load */
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_errorclear, INFINIPATH_E_RESET);
+
+ if (reinit)
+ ret = init_chip_reset(dd, pdp);
+ else
+ ret = init_chip_first(dd, pdp);
+
+ if (ret)
+ goto done;
+
+ ipath_cdbg(VERBOSE, "Revision %llx (PCI %x), %u ports, %u tids, "
+ "%u egrtids\n",
+ (unsigned long long) dd->ipath_revision, dd->ipath_pcirev,
+ dd->ipath_portcnt, dd->ipath_rcvtidcnt, dd->ipath_rcvegrcnt);
+
+ if (((dd->ipath_revision >> INFINIPATH_R_SOFTWARE_SHIFT) &
+ INFINIPATH_R_SOFTWARE_MASK) != IPATH_CHIP_SWVERSION) {
+ ipath_dev_err(dd, "Driver only handles version %d, "
+ "chip swversion is %d (%llx), failng\n",
+ IPATH_CHIP_SWVERSION,
+ (int)(dd->ipath_revision >>
+ INFINIPATH_R_SOFTWARE_SHIFT) &
+ INFINIPATH_R_SOFTWARE_MASK,
+ (unsigned long long) dd->ipath_revision);
+ ret = -ENOSYS;
+ goto done;
+ }
+ dd->ipath_majrev = (u8) ((dd->ipath_revision >>
+ INFINIPATH_R_CHIPREVMAJOR_SHIFT) &
+ INFINIPATH_R_CHIPREVMAJOR_MASK);
+ dd->ipath_minrev = (u8) ((dd->ipath_revision >>
+ INFINIPATH_R_CHIPREVMINOR_SHIFT) &
+ INFINIPATH_R_CHIPREVMINOR_MASK);
+ dd->ipath_boardrev = (u8) ((dd->ipath_revision >>
+ INFINIPATH_R_BOARDID_SHIFT) &
+ INFINIPATH_R_BOARDID_MASK);
+
+ ret = dd->ipath_f_get_boardname(dd, boardn, sizeof boardn);
+
+ snprintf(dd->ipath_boardversion, sizeof(dd->ipath_boardversion),
+ "Driver %u.%u, %s, InfiniPath%u %u.%u, PCI %u, "
+ "SW Compat %u\n",
+ IPATH_CHIP_VERS_MAJ, IPATH_CHIP_VERS_MIN, boardn,
+ (unsigned)(dd->ipath_revision >> INFINIPATH_R_ARCH_SHIFT) &
+ INFINIPATH_R_ARCH_MASK,
+ dd->ipath_majrev, dd->ipath_minrev, dd->ipath_pcirev,
+ (unsigned)(dd->ipath_revision >>
+ INFINIPATH_R_SOFTWARE_SHIFT) &
+ INFINIPATH_R_SOFTWARE_MASK);
+
+ ipath_dbg("%s", dd->ipath_boardversion);
+
+done:
+ return ret;
+}
+
+
+/**
+ * ipath_init_chip - do the actual initialization sequence on the chip
+ * @dd: the infinipath device
+ * @reinit: reinitializing, so don't allocate new memory
+ *
+ * Do the actual initialization sequence on the chip. This is done
+ * both from the init routine called from the PCI infrastructure, and
+ * when we reset the chip, or detect that it was reset internally.
+ * Memory allocation here and in called routines is only done in
+ * the first case (reinit == 0). We have to be careful, because even
+ * without memory allocation, we need to re-write all the chip registers
+ * TIDs, etc. after the reset has completed.
+ */
+int ipath_init_chip(struct ipath_devdata *dd, int reinit)
+{
+ int ret = 0, i;
+ u32 val32, kpiobufs;
+ u64 val, atmp;
+ struct ipath_portdata *pd = NULL; /* keep gcc4 happy */
+
+ ret = init_housekeeping(dd, &pd, reinit);
+ if (ret)
+ goto done;
+
+ /*
+ * we ignore most issues after reporting them, but have to specially
+ * handle hardware-disabled chips.
+ */
+ if (ret == 2) {
+ ret = -EPERM; /* unique error, known to infinipath_init_one */
+ goto done;
+ }
+
+ /*
+ * We could bump this to allow for full rcvegrcnt + rcvtidcnt,
+ * but then it no longer nicely fits power of two, and since
+ * we now use routines that backend onto __get_free_pages, the
+ * rest would be wasted.
+ */
+ dd->ipath_rcvhdrcnt = dd->ipath_rcvegrcnt;
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvhdrcnt,
+ dd->ipath_rcvhdrcnt);
+
+ /*
+ * Set up the shadow copies of the piobufavail registers,
+ * which we compare against the chip registers for now, and
+ * the in memory DMA'ed copies of the registers. This has to
+ * be done early, before we calculate lastport, etc.
+ */
+ val = dd->ipath_piobcnt2k + dd->ipath_piobcnt4k;
+ /*
+ * calc number of pioavail registers, and save it; we have 2
+ * bits per buffer.
+ */
+ dd->ipath_pioavregs = ALIGN(val, sizeof(u64) * BITS_PER_BYTE / 2)
+ / (sizeof(u64) * BITS_PER_BYTE / 2);
+ if (!ipath_kpiobufs) /* have to have at least 1, for SMA */
+ kpiobufs = ipath_kpiobufs = 1;
+ else if ((dd->ipath_piobcnt2k + dd->ipath_piobcnt4k) <
+ (dd->ipath_cfgports * IPATH_MIN_USER_PORT_BUFCNT)) {
+ dev_info(&dd->pcidev->dev, "Too few PIO buffers (%u) "
+ "for %u ports to have %u each!\n",
+ dd->ipath_piobcnt2k + dd->ipath_piobcnt4k,
+ dd->ipath_cfgports, IPATH_MIN_USER_PORT_BUFCNT);
+ kpiobufs = 1; /* reserve just the minimum for SMA/ether */
+ } else
+ kpiobufs = ipath_kpiobufs;
+
+ if (kpiobufs >
+ (dd->ipath_piobcnt2k + dd->ipath_piobcnt4k -
+ (dd->ipath_cfgports * IPATH_MIN_USER_PORT_BUFCNT))) {
+ i = dd->ipath_piobcnt2k + dd->ipath_piobcnt4k -
+ (dd->ipath_cfgports * IPATH_MIN_USER_PORT_BUFCNT);
+ if (i < 0)
+ i = 0;
+ dev_info(&dd->pcidev->dev, "Allocating %d PIO bufs for "
+ "kernel leaves too few for %d user ports "
+ "(%d each); using %u\n", kpiobufs,
+ dd->ipath_cfgports - 1,
+ IPATH_MIN_USER_PORT_BUFCNT, i);
+ /*
+ * shouldn't change ipath_kpiobufs, because could be
+ * different for different devices...
+ */
+ kpiobufs = i;
+ }
+ dd->ipath_lastport_piobuf =
+ dd->ipath_piobcnt2k + dd->ipath_piobcnt4k - kpiobufs;
+ dd->ipath_pbufsport =
+ dd->ipath_cfgports >
+ 1 ? dd->ipath_lastport_piobuf / (dd->ipath_cfgports - 1) : 0;
+ val32 = dd->ipath_lastport_piobuf -
+ (dd->ipath_pbufsport * (dd->ipath_cfgports - 1));
+ if (val32 > 0) {
+ ipath_dbg("allocating %u pbufs/port leaves %u unused, "
+ "add to kernel\n", dd->ipath_pbufsport, val32);
+ dd->ipath_lastport_piobuf -= val32;
+ ipath_dbg("%u pbufs/port leaves %u unused, add to kernel\n",
+ dd->ipath_pbufsport, val32);
+ }
+ dd->ipath_lastpioindex = dd->ipath_lastport_piobuf;
+ ipath_cdbg(VERBOSE, "%d PIO bufs for kernel out of %d total %u "
+ "each for %u user ports\n", kpiobufs,
+ dd->ipath_piobcnt2k + dd->ipath_piobcnt4k,
+ dd->ipath_pbufsport, dd->ipath_cfgports - 1);
+
+ dd->ipath_f_early_init(dd);
+
+ /* early_init sets rcvhdrentsize and rcvhdrsize, so this must be
+ * done after early_init */
+ dd->ipath_hdrqlast =
+ dd->ipath_rcvhdrentsize * (dd->ipath_rcvhdrcnt - 1);
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvhdrentsize,
+ dd->ipath_rcvhdrentsize);
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvhdrsize,
+ dd->ipath_rcvhdrsize);
+
+ if (!reinit) {
+ ret = init_pioavailregs(dd);
+ init_shadow_tids(dd);
+ if (ret)
+ goto done;
+ }
+
+ (void)ipath_write_kreg(dd, dd->ipath_kregs->kr_sendpioavailaddr,
+ dd->ipath_pioavailregs_phys);
+ /*
+ * this is to detect s/w errors, which the h/w works around by
+ * ignoring the low 6 bits of address, if it wasn't aligned.
+ */
+ val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_sendpioavailaddr);
+ if (val != dd->ipath_pioavailregs_phys) {
+ ipath_dev_err(dd, "Catastrophic software error, "
+ "SendPIOAvailAddr written as %lx, "
+ "read back as %llx\n",
+ (unsigned long) dd->ipath_pioavailregs_phys,
+ (unsigned long long) val);
+ ret = -EINVAL;
+ goto done;
+ }
+
+ val = ipath_port0_rcvhdrtail_dma + dd->ipath_unit * 64;
+
+ /* verify that the alignment requirement was met */
+ ipath_write_kreg_port(dd, dd->ipath_kregs->kr_rcvhdrtailaddr, 0, val);
+ atmp = ipath_read_kreg64_port(dd,
+ dd->ipath_kregs->kr_rcvhdrtailaddr, 0);
+ if (val != atmp) {
+ ipath_dev_err(dd, "Catastrophic software error, "
+ "RcvHdrTailAddr0 written as %llx, "
+ "read back as %llx from %x\n", (unsigned long long) val, (unsigned long long) atmp,
+ dd->ipath_kregs->kr_rcvhdrtailaddr);
+ ret = -EINVAL;
+ goto done;
+ }
+
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvbthqp, IPATH_KD_QP);
+
+ /*
+ * make sure we are not in freeze, and PIO send enabled, so
+ * writes to pbc happen
+ */
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask, 0ULL);
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrclear, -1LL);
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_control, 0ULL);
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl,
+ INFINIPATH_S_PIOENABLE);
+
+ /*
+ * before error clears, since we expect serdes pll errors during
+ * this, the first time after reset
+ */
+ if (bringup_link(dd)) {
+ dev_info(&dd->pcidev->dev, "Failed to bringup IB link\n");
+ ret = -ENETDOWN;
+ goto done;
+ }
+
+ /*
+ * clear any "expected" hwerrs from reset and/or initialization
+ * clear any that aren't enabled (at least this once), and then
+ * set the enable mask
+ */
+ dd->ipath_f_init_hwerrors(dd);
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrclear, -1LL);
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask,
+ dd->ipath_hwerrmask);
+
+ dd->ipath_maskederrs = dd->ipath_ignorederrs;
+ /* clear all */
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_errorclear, -1LL);
+ /* enable errors that are masked, at least this first time. */
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_errormask,
+ ~dd->ipath_maskederrs);
+ /* clear any interrups up to this point (ints still not enabled) */
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_intclear, -1LL);
+
+ ipath_stats.sps_lid[dd->ipath_unit] = dd->ipath_lid;
+
+ /*
+ * Set up the port 0 (kernel) rcvhdr q and egr TIDs. If doing
+ * re-init, the simplest way to handle this is to free
+ * existing, and re-allocate.
+ */
+ if (reinit)
+ ipath_free_pddata(dd, 0, 0);
+ dd->ipath_f_tidtemplate(dd);
+ ret = ipath_create_rcvhdrq(dd, pd);
+ if (!ret)
+ ret = create_port0_egr(dd);
+ if (ret)
+ ipath_dev_err(dd, "failed to allocate port 0 (kernel) "
+ "rcvhdrq and/or egr bufs\n");
+ else
+ enable_chip(dd, pd, reinit);
+
+ /*
+ * cause retrigger of pending interrupts ignored during init,
+ * even if we had errors
+ */
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_intclear, 0ULL);
+
+ if (!reinit) {
+ /*
+ * set up stats retrieval timer, even if we had errors
+ * in last portion of setup
+ */
+ init_timer(&dd->ipath_stats_timer);
+ dd->ipath_stats_timer.function = ipath_get_faststats;
+ dd->ipath_stats_timer.data = (unsigned long) dd;
+ /* every 5 seconds; */
+ dd->ipath_stats_timer.expires = jiffies + 5 * HZ;
+ /* takes ~16 seconds to overflow at full IB 4x bandwdith */
+ add_timer(&dd->ipath_stats_timer);
+ dd->ipath_stats_timer_active = 1;
+ }
+
+done:
+ if (!ret) {
+ ipath_get_guid(dd);
+ *dd->ipath_statusp |= IPATH_STATUS_CHIP_PRESENT;
+ if (!ipath_sma_data_spare) {
+ /*
+ * first init, setup SMA data structs
+ */
+ ipath_sma_data_spare =
+ ipath_sma_data_bufs[IPATH_NUM_SMA_PKTS];
+ for (i = 0; i < IPATH_NUM_SMA_PKTS; i++)
+ ipath_sma_data[i].buf = ipath_sma_data_bufs[i];
+ }
+ if (reinit) {
+ /*
+ * otherwise done in init_one, after some other setup
+ */
+ if (!dd->ipath_f_intrsetup(dd)) {
+ /* now we can enable all interrupts from
+ the chip */
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_intmask,
+ ~0ULL);
+ /* force re-interrupt of any pending
+ interrupts. */
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_intclear,
+ 0ULL);
+ /* OK, the chip is usable, marked it
+ as initialized */
+ *dd->ipath_statusp |= IPATH_STATUS_INITTED;
+ } else
+ ipath_dev_err(dd,
+ "Can't enable interrupts on re-init\n");
+ } else if (dd->ipath_cfgports > ipath_stats.sps_nports) {
+ /*
+ * sps_nports is a global, so, we set it to
+ * the highest number of ports of any of the
+ * chips we find; we never decrement it, at
+ * least for now.
+ */
+ ipath_stats.sps_nports = dd->ipath_cfgports;
+ }
+ } else
+ ipath_dbg("Failed (%d) to initialize chip\n", ret);
+
+ /* if ret is non-zero, we probably should do some cleanup
+ here... */
+ return ret;
+}
+
+static int ipath_set_kpiobufs(const char *str, struct kernel_param *kp)
+{
+ unsigned short val;
+ int ret, i;
+
+ ret = ipath_parse_ushort(str, &val);
+
+ if (ret < 0)
+ goto bail;
+
+ if (val == 0) {
+ ret = -EINVAL;
+ goto bail;
+ }
+
+ for (i = 0; i < atomic_read(&ipath_max); i++) {
+ struct ipath_devdata *dd = ipath_lookup(i);
+
+ if (!dd || dd->ipath_kregbase)
+ continue;
+ if (val > (dd->ipath_piobcnt2k + dd->ipath_piobcnt4k -
+ (dd->ipath_cfgports * IPATH_MIN_USER_PORT_BUFCNT)))
+ {
+ ipath_dev_err(dd,
+ "Allocating %d PIO bufs for kernel leaves "
+ "too few for %d user ports (%d each)\n", val,
+ dd->ipath_cfgports - 1,
+ IPATH_MIN_USER_PORT_BUFCNT);
+ ret = -EINVAL;
+ goto bail;
+ }
+ dd->ipath_lastport_piobuf =
+ dd->ipath_piobcnt2k + dd->ipath_piobcnt4k - val;
+ }
+
+ ret = 0;
+bail:
+ return ret;
+}
^ permalink raw reply [flat|nested] 70+ messages in thread* [PATCH 7 of 20] ipath - misc driver support code
2006-03-10 0:35 [PATCH 0 of 20] [RFC] ipath driver - another round for review Bryan O'Sullivan
` (5 preceding siblings ...)
2006-03-10 0:35 ` [PATCH 6 of 20] ipath - chip initialisation code Bryan O'Sullivan
@ 2006-03-10 0:35 ` Bryan O'Sullivan
2006-03-10 0:35 ` [PATCH 8 of 20] ipath - sysfs support for core driver Bryan O'Sullivan
` (13 subsequent siblings)
20 siblings, 0 replies; 70+ messages in thread
From: Bryan O'Sullivan @ 2006-03-10 0:35 UTC (permalink / raw)
To: rolandd, gregkh, akpm, davem; +Cc: linux-kernel, openib-general
EEPROM support, interrupt handling, statistics gathering, and write
combining management for x86_64.
A note regarding i2c: The Atmel EEPROM hardware we use looks like an
i2c device electrically, but is not i2c compliant at all from a
functional perspective. We tried using the kernel's i2c support to
talk to it, but failed.
Normal i2c devices have a single 7-bit or 10-bit i2c address that they
respond to. Valid 7-bit addresses range from 0x03 to 0x77. Addresses
0x00 to 0x02 and 0x78 to 0x7F are special reserved addresses
(e.g. 0x00 is the "general call" address.) The Atmel device, on the
other hand, responds to ALL addresses. It's designed to be the only
device on a given i2c bus. A given i2c device address corresponds to
the memory address within the i2c device itself.
At least one reason why the linux core i2c stuff won't work for this
is that it prohibits access to reserved addresses like 0x00, which are
really valid addresses on the Atmel devices.
Signed-off-by: Bryan O'Sullivan <bos@pathscale.com>
diff -r 696ba12283f4 -r a9ed49ad489c drivers/infiniband/hw/ipath/ipath_eeprom.c
--- /dev/null Thu Jan 1 00:00:00 1970 +0000
+++ b/drivers/infiniband/hw/ipath/ipath_eeprom.c Thu Mar 9 16:15:49 2006 -0800
@@ -0,0 +1,587 @@
+/*
+ * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/delay.h>
+#include <linux/pci.h>
+#include <linux/vmalloc.h>
+
+#include "ipath_kernel.h"
+
+/*
+ * InfiniPath I2C driver for a serial eeprom. This is not a generic
+ * I2C interface. For a start, the device we're using (Atmel AT24C11)
+ * doesn't work like a regular I2C device. It looks like one
+ * electrically, but not logically. Normal I2C devices have a single
+ * 7-bit or 10-bit I2C address that they respond to. Valid 7-bit
+ * addresses range from 0x03 to 0x77. Addresses 0x00 to 0x02 and 0x78
+ * to 0x7F are special reserved addresses (e.g. 0x00 is the "general
+ * call" address.) The Atmel device, on the other hand, responds to ALL
+ * 7-bit addresses. It's designed to be the only device on a given I2C
+ * bus. A 7-bit address corresponds to the memory address within the
+ * Atmel device itself.
+ *
+ * Also, the timing requirements mean more than simple software
+ * bitbanging, with readbacks from chip to ensure timing (simple udelay
+ * is not enough).
+ *
+ * This all means that accessing the device is specialized enough
+ * that using the standard kernel I2C bitbanging interface would be
+ * impossible. For example, the core I2C eeprom driver expects to find
+ * a device at one or more of a limited set of addresses only. It doesn't
+ * allow writing to an eeprom. It also doesn't provide any means of
+ * accessing eeprom contents from within the kernel, only via sysfs.
+ */
+
+enum i2c_type {
+ i2c_line_scl = 0,
+ i2c_line_sda
+};
+
+enum i2c_state {
+ i2c_line_low = 0,
+ i2c_line_high
+};
+
+#define READ_CMD 1
+#define WRITE_CMD 0
+
+static int eeprom_init;
+
+/*
+ * The gpioval manipulation really should be protected by spinlocks
+ * or be converted to use atomic operations.
+ */
+
+/**
+ * i2c_gpio_set - set a GPIO line
+ * @dd: the infinipath device
+ * @line: the line to set
+ * @new_line_state: the state to set
+ *
+ * Returns 0 if the line was set to the new state successfully, non-zero
+ * on error.
+ */
+static int i2c_gpio_set(struct ipath_devdata *dd,
+ enum i2c_type line,
+ enum i2c_state new_line_state)
+{
+ u64 read_val, write_val, mask, *gpioval;
+
+ gpioval = &dd->ipath_gpio_out;
+ read_val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_extctrl);
+ if (line == i2c_line_scl)
+ mask = ipath_gpio_scl;
+ else
+ mask = ipath_gpio_sda;
+
+ if (new_line_state == i2c_line_high)
+ /* tri-state the output rather than force high */
+ write_val = read_val & ~mask;
+ else
+ /* config line to be an output */
+ write_val = read_val | mask;
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_extctrl, write_val);
+
+ /* set high and verify */
+ if (new_line_state == i2c_line_high)
+ write_val = 0x1UL;
+ else
+ write_val = 0x0UL;
+
+ if (line == i2c_line_scl) {
+ write_val <<= ipath_gpio_scl_num;
+ *gpioval = *gpioval & ~(1UL << ipath_gpio_scl_num);
+ *gpioval |= write_val;
+ } else {
+ write_val <<= ipath_gpio_sda_num;
+ *gpioval = *gpioval & ~(1UL << ipath_gpio_sda_num);
+ *gpioval |= write_val;
+ }
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_gpio_out, *gpioval);
+
+ return 0;
+}
+
+/**
+ * i2c_gpio_get - get a GPIO line state
+ * @dd: the infinipath device
+ * @line: the line to get
+ * @curr_statep: where to put the line state
+ *
+ * Returns 0 if the line was set to the new state successfully, non-zero
+ * on error. curr_state is not set on error.
+ */
+static int i2c_gpio_get(struct ipath_devdata *dd,
+ enum i2c_type line,
+ enum i2c_state *curr_statep)
+{
+ u64 read_val, write_val, mask;
+
+ /* check args */
+ if (curr_statep == NULL)
+ return 1;
+
+ read_val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_extctrl);
+ /* config line to be an input */
+ if (line == i2c_line_scl)
+ mask = ipath_gpio_scl;
+ else
+ mask = ipath_gpio_sda;
+ write_val = read_val & ~mask;
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_extctrl, write_val);
+ read_val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_extstatus);
+
+ if (read_val & mask)
+ *curr_statep = i2c_line_high;
+ else
+ *curr_statep = i2c_line_low;
+
+ return 0;
+}
+
+/**
+ * i2c_wait_for_writes - wait for a write
+ * @dd: the infinipath device
+ *
+ * We use this instead of udelay directly, so we can make sure
+ * that previous register writes have been flushed all the way
+ * to the chip. Since we are delaying anyway, the cost doesn't
+ * hurt, and makes the bit twiddling more regular
+ */
+static void i2c_wait_for_writes(struct ipath_devdata *dd)
+{
+ (void)ipath_read_kreg32(dd, dd->ipath_kregs->kr_scratch);
+}
+
+static void scl_out(struct ipath_devdata *dd, u8 bit)
+{
+ i2c_gpio_set(dd, i2c_line_scl, bit ? i2c_line_high : i2c_line_low);
+
+ i2c_wait_for_writes(dd);
+}
+
+static void sda_out(struct ipath_devdata *dd, u8 bit)
+{
+ i2c_gpio_set(dd, i2c_line_sda, bit ? i2c_line_high : i2c_line_low);
+
+ i2c_wait_for_writes(dd);
+}
+
+static u8 sda_in(struct ipath_devdata *dd, int wait)
+{
+ enum i2c_state bit;
+
+ if (i2c_gpio_get(dd, i2c_line_sda, &bit))
+ ipath_dbg("get bit failed!\n");
+
+ if (wait)
+ i2c_wait_for_writes(dd);
+
+ return bit == i2c_line_high ? 1U : 0;
+}
+
+/**
+ * i2c_ackrcv - see if ack following write is true
+ * @dd: the infinipath device
+ */
+static int i2c_ackrcv(struct ipath_devdata *dd)
+{
+ u8 ack_received;
+
+ /* AT ENTRY SCL = LOW */
+ /* change direction, ignore data */
+ ack_received = sda_in(dd, 1);
+ scl_out(dd, i2c_line_high);
+ ack_received = sda_in(dd, 1) == 0;
+ scl_out(dd, i2c_line_low);
+ return ack_received;
+}
+
+/**
+ * wr_byte - write a byte, one bit at a time
+ * @dd: the infinipath device
+ * @data: the byte to write
+ *
+ * Returns 0 if we got the following ack, otherwise 1
+ */
+static int wr_byte(struct ipath_devdata *dd, u8 data)
+{
+ int bit_cntr;
+ u8 bit;
+
+ for (bit_cntr = 7; bit_cntr >= 0; bit_cntr--) {
+ bit = (data >> bit_cntr) & 1;
+ sda_out(dd, bit);
+ scl_out(dd, i2c_line_high);
+ scl_out(dd, i2c_line_low);
+ }
+ if (!i2c_ackrcv(dd))
+ return 1;
+ return 0;
+}
+
+static void send_ack(struct ipath_devdata *dd)
+{
+ sda_out(dd, i2c_line_low);
+ scl_out(dd, i2c_line_high);
+ scl_out(dd, i2c_line_low);
+ sda_out(dd, i2c_line_high);
+}
+
+/**
+ * i2c_startcmd - transmit the start condition, followed by address/cmd
+ * @dd: the infinipath device
+ * @offset_dir: direction byte
+ *
+ * (both clock/data high, clock high, data low while clock is high)
+ */
+static int i2c_startcmd(struct ipath_devdata *dd, u8 offset_dir)
+{
+ int res;
+
+ /* issue start sequence */
+ sda_out(dd, i2c_line_high);
+ scl_out(dd, i2c_line_high);
+ sda_out(dd, i2c_line_low);
+ scl_out(dd, i2c_line_low);
+
+ /* issue length and direction byte */
+ res = wr_byte(dd, offset_dir);
+
+ if (res)
+ ipath_cdbg(VERBOSE, "No ack to complete start\n");
+ return res;
+}
+
+/**
+ * stop_cmd - transmit the stop condition
+ * @dd: the infinipath device
+ *
+ * (both clock/data low, clock high, data high while clock is high)
+ */
+static void stop_cmd(struct ipath_devdata *dd)
+{
+ scl_out(dd, i2c_line_low);
+ sda_out(dd, i2c_line_low);
+ scl_out(dd, i2c_line_high);
+ sda_out(dd, i2c_line_high);
+ udelay(2);
+}
+
+/**
+ * eeprom_reset - reset I2C communication
+ * @dd: the infinipath device
+ */
+
+static int eeprom_reset(struct ipath_devdata *dd)
+{
+ int clock_cycles_left = 9;
+ u64 *gpioval = &dd->ipath_gpio_out;
+
+ eeprom_init = 1;
+ *gpioval = ipath_read_kreg64(dd, dd->ipath_kregs->kr_gpio_out);
+ ipath_cdbg(VERBOSE, "Resetting i2c eeprom; initial gpioout reg "
+ "is %llx\n", (unsigned long long) *gpioval);
+
+ /*
+ * This is to get the i2c into a known state, by first going low,
+ * then tristate sda (and then tristate scl as first thing
+ * in loop)
+ */
+ scl_out(dd, i2c_line_low);
+ sda_out(dd, i2c_line_high);
+
+ while (clock_cycles_left--) {
+ scl_out(dd, i2c_line_high);
+
+ if (sda_in(dd, 0)) {
+ sda_out(dd, i2c_line_low);
+ scl_out(dd, i2c_line_low);
+ return 0;
+ }
+
+ scl_out(dd, i2c_line_low);
+ }
+
+ return 1;
+}
+
+/**
+ * ipath_eeprom_read - receives bytes from the eeprom via I2C
+ * @dd: the infinipath device
+ * @eeprom_offset: address to read from
+ * @buffer: where to store result
+ * @len: number of bytes to receive
+ */
+
+int ipath_eeprom_read(struct ipath_devdata *dd, u8 eeprom_offset,
+ void *buffer, int len)
+{
+ /* compiler complains unless initialized */
+ u8 single_byte = 0;
+ int bit_cntr;
+
+ if (!eeprom_init)
+ eeprom_reset(dd);
+
+ eeprom_offset = (eeprom_offset << 1) | READ_CMD;
+
+ if (i2c_startcmd(dd, eeprom_offset)) {
+ ipath_dbg("Failed startcmd\n");
+ stop_cmd(dd);
+ return 1;
+ }
+
+ /*
+ * eeprom keeps clocking data out as long as we ack, automatically
+ * incrementing the address.
+ */
+ while (len-- > 0) {
+ /* get data */
+ single_byte = 0;
+ for (bit_cntr = 8; bit_cntr; bit_cntr--) {
+ u8 bit;
+ scl_out(dd, i2c_line_high);
+ bit = sda_in(dd, 0);
+ single_byte |= bit << (bit_cntr - 1);
+ scl_out(dd, i2c_line_low);
+ }
+
+ /* send ack if not the last byte */
+ if (len)
+ send_ack(dd);
+
+ *((u8 *) buffer) = single_byte;
+ buffer++;
+ }
+
+ stop_cmd(dd);
+
+ return 0;
+}
+
+/**
+ * ipath_eeprom_write - writes data to the eeprom via I2C
+ * @dd: the infinipath device
+ * @eeprom_offset: where to place data
+ * @buffer: data to write
+ * @len: number of bytes to write
+ */
+int ipath_eeprom_write(struct ipath_devdata *dd, u8 eeprom_offset,
+ const void *buffer, int len)
+{
+ u8 single_byte;
+ int sub_len;
+ const u8 *bp = buffer;
+ int max_wait_time, i;
+
+ if (!eeprom_init)
+ eeprom_reset(dd);
+
+ while (len > 0) {
+ if (i2c_startcmd(dd, (eeprom_offset << 1) | WRITE_CMD)) {
+ ipath_dbg("Failed to start cmd offset %u\n",
+ eeprom_offset);
+ goto failed_write;
+ }
+
+ sub_len = min(len, 4);
+ eeprom_offset += sub_len;
+ len -= sub_len;
+
+ for (i = 0; i < sub_len; i++) {
+ if (wr_byte(dd, *bp++)) {
+ ipath_dbg("no ack after byte %u/%u (%u "
+ "total remain)\n", i, sub_len,
+ len + sub_len - i);
+ goto failed_write;
+ }
+ }
+
+ stop_cmd(dd);
+
+ /*
+ * wait for write complete by waiting for a successful
+ * read (the chip replies with a zero after the write
+ * cmd completes, and before it writes to the eeprom.
+ * The startcmd for the read will fail the ack until
+ * the writes have completed. We do this inline to avoid
+ * the debug prints that are in the real read routine
+ * if the startcmd fails.
+ */
+ max_wait_time = 100;
+ while (i2c_startcmd(dd, READ_CMD)) {
+ stop_cmd(dd);
+ if (!--max_wait_time) {
+ ipath_dbg("Did not get successful read to "
+ "complete write\n");
+ goto failed_write;
+ }
+ }
+ /* now read the zero byte */
+ for (i = single_byte = 0; i < 8; i++) {
+ u8 bit;
+ scl_out(dd, i2c_line_high);
+ bit = sda_in(dd, 0);
+ scl_out(dd, i2c_line_low);
+ single_byte <<= 1;
+ single_byte |= bit;
+ }
+ stop_cmd(dd);
+ }
+
+ return 0;
+
+ failed_write:
+ stop_cmd(dd);
+ return 1;
+}
+
+static u8 flash_csum(struct ipath_flash *ifp, int adjust)
+{
+ u8 *ip = (u8 *) ifp;
+ u8 csum = 0, len;
+
+ for (len = 0; len < ifp->if_length; len++)
+ csum += *ip++;
+ csum -= ifp->if_csum;
+ csum = ~csum;
+ if (adjust)
+ ifp->if_csum = csum;
+ return csum;
+}
+
+/**
+ * ipath_get_guid - get the GUID from the i2c device
+ * @dd: the infinipath device
+ *
+ * When we add the multi-chip support, we will probably have to add
+ * the ability to use the number of guids field, and get the guid from
+ * the first chip's flash, to use for all of them.
+ */
+void ipath_get_guid(struct ipath_devdata *dd)
+{
+ void *buf;
+ struct ipath_flash *ifp;
+ u64 guid;
+ int len;
+ u8 csum, *bguid;
+ int t = dd->ipath_unit;
+ struct ipath_devdata *dd0 = ipath_lookup(0);
+
+ if (t && dd0->ipath_nguid > 1 && t <= dd0->ipath_nguid) {
+ u8 *bguid, oguid;
+ dd->ipath_guid = dd0->ipath_guid;
+ bguid = (u8 *) & dd->ipath_guid;
+
+ oguid = bguid[7];
+ bguid[7] += t;
+ if (oguid > bguid[7]) {
+ if (bguid[6] == 0xff) {
+ if (bguid[5] == 0xff) {
+ ipath_dev_err(dd,
+ "Can't set %s GUID from "
+ "base GUID, wraps to OUI!\n",
+ ipath_get_unit_name(t));
+ dd->ipath_guid = 0;
+ return;
+ }
+ bguid[5]++;
+ }
+ bguid[6]++;
+ }
+ dd->ipath_nguid = 1;
+
+ ipath_dbg("nguid %u, so adding %u to device 0 guid, "
+ "for %llx (big-endian)\n",
+ dd0->ipath_nguid, t,
+ (unsigned long long) dd->ipath_guid);
+ return;
+ }
+
+ len = offsetof(struct ipath_flash, if_future);
+ buf = vmalloc(len);
+ if (!buf) {
+ ipath_dev_err(dd,
+ "Couldn't allocate memory to read %u bytes "
+ "from eeprom for GUID\n", len);
+ return;
+ }
+
+ if (ipath_eeprom_read(dd, 0, buf, len)) {
+ ipath_dev_err(dd, "Failed reading GUID from eeprom\n");
+ goto done;
+ }
+ ifp = (struct ipath_flash *)buf;
+
+ csum = flash_csum(ifp, 0);
+ if (csum != ifp->if_csum) {
+ dev_info(&dd->pcidev->dev, "Bad I2C flash checksum: "
+ "0x%x, not 0x%x\n", csum, ifp->if_csum);
+ goto done;
+ }
+ if (*(u64 *) ifp->if_guid == 0ULL || *(u64 *) ifp->if_guid == -1LL) {
+ ipath_dev_err(dd, "Invalid GUID %llx from flash; ignoring\n",
+ *(unsigned long long *) ifp->if_guid);
+ goto done; /* don't allow GUID if all 0 or all 1's */
+ }
+
+ /* complain, but allow it */
+ if (*(u64 *) ifp->if_guid == 0x100007511000000ULL)
+ dev_info(&dd->pcidev->dev, "Warning, GUID %llx is "
+ "default, probably not correct!\n",
+ *(unsigned long long *) ifp->if_guid);
+
+ bguid = ifp->if_guid;
+ if (!bguid[0] && !bguid[1] && !bguid[2]) {
+ /* original incorrect GUID format in flash; fix in
+ * core copy, by shifting up 2 octets; don't need to
+ * change top octet, since both it and shifted are
+ * 0.. */
+ bguid[1] = bguid[3];
+ bguid[2] = bguid[4];
+ bguid[3] = bguid[4] = 0;
+ guid = *(u64 *) ifp->if_guid;
+ ipath_cdbg(VERBOSE, "Old GUID format in flash, top 3 zero, "
+ "shifting 2 octets\n");
+ } else
+ guid = *(u64 *) ifp->if_guid;
+ dd->ipath_guid = guid;
+ dd->ipath_nguid = ifp->if_numguid;
+ memcpy(dd->ipath_serial, ifp->if_serial,
+ sizeof(ifp->if_serial));
+ ipath_cdbg(VERBOSE, "Initted GUID to %llx (big-endian) from i2c "
+ "flash\n", (unsigned long long) dd->ipath_guid);
+
+done:
+ vfree(buf);
+}
diff -r 696ba12283f4 -r a9ed49ad489c drivers/infiniband/hw/ipath/ipath_intr.c
--- /dev/null Thu Jan 1 00:00:00 1970 +0000
+++ b/drivers/infiniband/hw/ipath/ipath_intr.c Thu Mar 9 16:15:49 2006 -0800
@@ -0,0 +1,762 @@
+/*
+ * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/pci.h>
+
+#include "ipath_kernel.h"
+#include "ips_common.h"
+#include "ipath_layer.h"
+
+#define E_SUM_PKTERRS \
+ (INFINIPATH_E_RHDRLEN | INFINIPATH_E_RBADTID | \
+ INFINIPATH_E_RBADVERSION | INFINIPATH_E_RHDR | \
+ INFINIPATH_E_RLONGPKTLEN | INFINIPATH_E_RSHORTPKTLEN | \
+ INFINIPATH_E_RMAXPKTLEN | INFINIPATH_E_RMINPKTLEN | \
+ INFINIPATH_E_RFORMATERR | INFINIPATH_E_RUNSUPVL | \
+ INFINIPATH_E_RUNEXPCHAR | INFINIPATH_E_REBP)
+
+#define E_SUM_ERRS \
+ (INFINIPATH_E_SPIOARMLAUNCH | INFINIPATH_E_SUNEXPERRPKTNUM | \
+ INFINIPATH_E_SDROPPEDDATAPKT | INFINIPATH_E_SDROPPEDSMPPKT | \
+ INFINIPATH_E_SMAXPKTLEN | INFINIPATH_E_SUNSUPVL | \
+ INFINIPATH_E_SMINPKTLEN | INFINIPATH_E_SPKTLEN | \
+ INFINIPATH_E_INVALIDADDR)
+
+static u64 handle_e_sum_errs(struct ipath_devdata *dd, ipath_err_t errs)
+{
+ unsigned long sbuf[4];
+ u64 ignore_this_time = 0;
+ u32 piobcnt;
+
+ /* if possible that sendbuffererror could be valid */
+ piobcnt = dd->ipath_piobcnt2k + dd->ipath_piobcnt4k;
+ /* read these before writing errorclear */
+ sbuf[0] = ipath_read_kreg64(dd, dd->ipath_kregs->kr_sendbuffererror);
+ sbuf[1] = ipath_read_kreg64(dd,
+ dd->ipath_kregs->kr_sendbuffererror + 1);
+ if (piobcnt > 128) {
+ sbuf[2] = ipath_read_kreg64(dd,
+ dd->ipath_kregs->kr_sendbuffererror + 2);
+ sbuf[3] = ipath_read_kreg64(dd,
+ dd->ipath_kregs->kr_sendbuffererror + 3);
+ }
+
+ if (sbuf[0] || sbuf[1] || (piobcnt > 128 && (sbuf[2] || sbuf[3]))) {
+ int i;
+
+ ipath_cdbg(PKT, "SendbufErrs %lx %lx ", sbuf[0], sbuf[1]);
+ if (ipath_debug & __IPATH_PKTDBG && piobcnt > 128)
+ printk("%lx %lx ", sbuf[2], sbuf[3]);
+ for (i = 0; i < piobcnt; i++) {
+ if (test_bit(i, sbuf)) {
+ u32 __iomem *piobuf;
+ if (i < dd->ipath_piobcnt2k)
+ piobuf = (u32 __iomem *) (dd->ipath_pio2kbase + i * dd->ipath_palign);
+ else
+ piobuf = (u32 __iomem *) (dd->ipath_pio4kbase + (i - dd->ipath_piobcnt2k) * dd->ipath_4kalign);
+
+ ipath_cdbg(PKT, "PIObuf[%u] @%p pbc is %x; ",
+ i, piobuf, readl(piobuf));
+
+ ipath_disarm_piobufs(dd, i, 1);
+ }
+ }
+ if (ipath_debug & __IPATH_PKTDBG)
+ printk("\n");
+ }
+ if ((errs & (INFINIPATH_E_SDROPPEDDATAPKT |
+ INFINIPATH_E_SDROPPEDSMPPKT | INFINIPATH_E_SMINPKTLEN)) &&
+ !(dd->ipath_flags & IPATH_LINKACTIVE)) {
+ /*
+ * This can happen when SMA is trying to bring the link
+ * up, but the IB link changes state at the "wrong" time.
+ * The IB logic then complains that the packet isn't
+ * valid. We don't want to confuse people, so we just
+ * don't print them, except at debug
+ */
+ ipath_dbg("Ignoring pktsend errors %llx, because not "
+ "yet active\n", (unsigned long long) errs);
+ ignore_this_time = INFINIPATH_E_SDROPPEDDATAPKT |
+ INFINIPATH_E_SDROPPEDSMPPKT | INFINIPATH_E_SMINPKTLEN;
+ }
+
+ return ignore_this_time;
+}
+
+static void handle_e_ibstatuschanged(struct ipath_devdata *dd,
+ ipath_err_t errs, int noprint)
+{
+ u64 val;
+ u32 ltstate, lstate;
+
+ /*
+ * even if diags are enabled, we want to notice LINKINIT, etc.
+ * We just don't want to change the LED state, or
+ * dd->ipath_kregs->kr_ibcctrl
+ */
+
+ val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_ibcstatus);
+ lstate = val & IPATH_IBSTATE_MASK;
+ if (lstate == IPATH_IBSTATE_INIT || lstate == IPATH_IBSTATE_ARM
+ || lstate == IPATH_IBSTATE_ACTIVE)
+ ipath_dbg("Link unit %u state changed to 0x%x, last "
+ "was 0x%llx\n", dd->ipath_unit, lstate,
+ (unsigned long long) dd->ipath_lastibcstat);
+ else {
+ lstate = dd->ipath_lastibcstat & IPATH_IBSTATE_MASK;
+ if (lstate == IPATH_IBSTATE_INIT
+ || lstate == IPATH_IBSTATE_ARM
+ || lstate == IPATH_IBSTATE_ACTIVE)
+ ipath_dbg("Link unit %u state changed to down "
+ "state 0x%llx, from 0x%llx\n",
+ dd->ipath_unit, (unsigned long long) val,
+ (unsigned long long) dd->ipath_lastibcstat);
+ else
+ ipath_cdbg(VERBOSE, "Link unit %u state changed "
+ "to 0x%llx from down\n",
+ dd->ipath_unit, (unsigned long long) val);
+ }
+ ltstate = (val >> INFINIPATH_IBCS_LINKTRAININGSTATE_SHIFT) &
+ INFINIPATH_IBCS_LINKTRAININGSTATE_MASK;
+ lstate = (val >> INFINIPATH_IBCS_LINKSTATE_SHIFT) &
+ INFINIPATH_IBCS_LINKSTATE_MASK;
+
+ if (ltstate == INFINIPATH_IBCS_LT_STATE_POLLACTIVE ||
+ ltstate == INFINIPATH_IBCS_LT_STATE_POLLQUIET) {
+ u32 last_ltstate;
+
+ /*
+ * Ignore cycling back and forth from Polling.Active
+ * to Polling.Quiet while waiting for the other end of
+ * the link to come up. We will cycle back and forth
+ * between them if no cable is plugged in,
+ * the other device is powered off or disabled, etc.
+ */
+ last_ltstate = (dd->ipath_lastibcstat >>
+ INFINIPATH_IBCS_LINKTRAININGSTATE_SHIFT)
+ & INFINIPATH_IBCS_LINKTRAININGSTATE_MASK;
+ if (last_ltstate == INFINIPATH_IBCS_LT_STATE_POLLACTIVE
+ || last_ltstate ==
+ INFINIPATH_IBCS_LT_STATE_POLLQUIET) {
+ if (dd->ipath_ibpollcnt > 40) {
+ dd->ipath_flags |= IPATH_NOCABLE;
+ *dd->ipath_statusp |=
+ IPATH_STATUS_IB_NOCABLE;
+ } else
+ dd->ipath_ibpollcnt++;
+ goto skip_ibchange;
+ }
+ }
+ dd->ipath_ibpollcnt = 0; /* some state other than 2 or 3 */
+ ipath_stats.sps_iblink++;
+ if (ltstate != INFINIPATH_IBCS_LT_STATE_LINKUP) {
+ dd->ipath_flags |= IPATH_LINKDOWN;
+ dd->ipath_flags &= ~(IPATH_LINKUNK | IPATH_LINKINIT
+ | IPATH_LINKACTIVE |
+ IPATH_LINKARMED);
+ *dd->ipath_statusp &= ~IPATH_STATUS_IB_READY;
+ if (!noprint) {
+ if (((dd->ipath_lastibcstat >>
+ INFINIPATH_IBCS_LINKSTATE_SHIFT) &
+ INFINIPATH_IBCS_LINKSTATE_MASK)
+ == INFINIPATH_IBCS_L_STATE_ACTIVE)
+ /* if from up to down be more vocal */
+ ipath_dbg("Link unit %u is now down (%s)\n",
+ dd->ipath_unit,
+ ipath_ibcstatus_str[ltstate]);
+ else
+ ipath_cdbg(VERBOSE, "Link unit %u is "
+ "down (%s)\n", dd->ipath_unit,
+ ipath_ibcstatus_str[ltstate]);
+ }
+
+ dd->ipath_f_setextled(dd, lstate, ltstate);
+ } else if ((val & IPATH_IBSTATE_MASK) == IPATH_IBSTATE_ACTIVE) {
+ if (!noprint)
+ ipath_dbg("Link unit %u is now in active state\n",
+ dd->ipath_unit);
+ dd->ipath_flags |= IPATH_LINKACTIVE;
+ dd->ipath_flags &=
+ ~(IPATH_LINKUNK | IPATH_LINKINIT | IPATH_LINKDOWN |
+ IPATH_LINKARMED | IPATH_NOCABLE);
+ *dd->ipath_statusp &= ~IPATH_STATUS_IB_NOCABLE;
+ *dd->ipath_statusp |=
+ IPATH_STATUS_IB_READY | IPATH_STATUS_IB_CONF;
+ dd->ipath_f_setextled(dd, lstate, ltstate);
+
+ if (dd->ipath_layer.l_intr)
+ dd->ipath_layer.l_intr(dd->ipath_unit,
+ IPATH_LAYER_INT_IF_UP);
+ } else if ((val & IPATH_IBSTATE_MASK) == IPATH_IBSTATE_INIT) {
+ /*
+ * set INIT and DOWN. Down is checked by most of the other
+ * code, but INIT is useful to know in a few places.
+ */
+ dd->ipath_flags |= IPATH_LINKINIT | IPATH_LINKDOWN;
+ dd->ipath_flags &=
+ ~(IPATH_LINKUNK | IPATH_LINKACTIVE | IPATH_LINKARMED
+ | IPATH_NOCABLE);
+ *dd->ipath_statusp &= ~(IPATH_STATUS_IB_NOCABLE
+ | IPATH_STATUS_IB_READY);
+
+ dd->ipath_f_setextled(dd, lstate, ltstate);
+ } else if ((val & IPATH_IBSTATE_MASK) == IPATH_IBSTATE_ARM) {
+ dd->ipath_flags |= IPATH_LINKARMED;
+ dd->ipath_flags &=
+ ~(IPATH_LINKUNK | IPATH_LINKDOWN | IPATH_LINKINIT |
+ IPATH_LINKACTIVE | IPATH_NOCABLE);
+ *dd->ipath_statusp &= ~(IPATH_STATUS_IB_NOCABLE
+ | IPATH_STATUS_IB_READY);
+ dd->ipath_f_setextled(dd, lstate, ltstate);
+ } else {
+ if (!noprint)
+ ipath_dbg("IBstatuschange unit %u: %s\n",
+ dd->ipath_unit,
+ ipath_ibcstatus_str[ltstate]);
+ }
+skip_ibchange:
+ dd->ipath_lastibcstat = val;
+}
+
+static unsigned handle_frequent_errors(struct ipath_devdata *dd,
+ ipath_err_t errs, char msg[512],
+ int *noprint)
+{
+ cycles_t nc;
+ static cycles_t nextmsg_time;
+ static unsigned nmsgs, supp_msgs;
+
+ /*
+ * throttle back "fast" messages to no more than 10 per 5 seconds
+ * (1.4-2GHz clock). This isn't perfect, but it's a reasonable
+ * heuristic. If we get more than 10, give a 5x longer delay
+ */
+ nc = get_cycles();
+ if (nmsgs > 10) {
+ if (nc < nextmsg_time) {
+ *noprint = 1;
+ if (!supp_msgs++)
+ nextmsg_time = nc + 50000000000ULL;
+ } else if (supp_msgs) {
+ /*
+ * Print the message unless it's ibc status
+ * change only, which happens so often we never
+ * want to count it.
+ */
+ if (dd->ipath_lasterror & ~INFINIPATH_E_IBSTATUSCHANGED) {
+ ipath_decode_err(msg, sizeof msg,
+ dd->ipath_lasterror &
+ ~INFINIPATH_E_IBSTATUSCHANGED);
+ if (dd->
+ ipath_lasterror & ~(INFINIPATH_E_RRCVEGRFULL
+ |
+ INFINIPATH_E_RRCVHDRFULL))
+ ipath_dev_err(dd,
+ "Suppressed %u messages for fast-repeating errors (%s) (%llx)\n",
+ supp_msgs, msg,
+ (unsigned long long) dd->ipath_lasterror);
+ else {
+ /*
+ * rcvegrfull and rcvhdrqfull are
+ * "normal", for some types of
+ * processes (mostly benchmarks)
+ * that send huge numbers of
+ * messages, while not processing
+ * them. So only complain about
+ * these at debug level.
+ */
+ ipath_dbg("Suppressed %u messages "
+ "for %s\n", supp_msgs, msg);
+ }
+ }
+ supp_msgs = 0;
+ nmsgs = 0;
+ }
+ }
+ else if (!nmsgs++ || nc > nextmsg_time) /* start timer */
+ nextmsg_time = nc + 10000000000ULL;
+
+ return supp_msgs;
+}
+
+static void handle_errors(struct ipath_devdata *dd, ipath_err_t errs)
+{
+ char msg[512];
+ u64 ignore_this_time = 0;
+ int i;
+ int chkerrpkts = 0, noprint = 0;
+ unsigned supp_msgs;
+
+ supp_msgs = handle_frequent_errors(dd, errs, msg, &noprint);
+
+ /*
+ * don't report errors that are masked (includes those always
+ * ignored)
+ */
+ errs &= ~dd->ipath_maskederrs;
+
+ /* do these first, they are most important */
+ if (errs & INFINIPATH_E_HARDWARE) {
+ /* reuse same msg buf */
+ dd->ipath_f_handle_hwerrors(dd, msg, sizeof msg);
+ }
+
+ if (!noprint && (errs & ~infinipath_e_bitsextant))
+ ipath_dev_err(dd,
+ "error interrupt with unknown errors %llx set\n",
+ (unsigned long long) (errs & ~infinipath_e_bitsextant));
+
+ if (errs & E_SUM_ERRS)
+ ignore_this_time = handle_e_sum_errs(dd, errs);
+
+ if (supp_msgs == 250000) {
+ /*
+ * It's not entirely reasonable assuming that the errors
+ * set in the last clear period are all responsible for
+ * the problem, but the alternative is to assume it's the only
+ * ones on this particular interrupt, which also isn't great
+ */
+ dd->ipath_maskederrs |= dd->ipath_lasterror | errs;
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_errormask,
+ ~dd->ipath_maskederrs);
+ ipath_decode_err(msg, sizeof msg,
+ (dd->ipath_maskederrs & ~dd->
+ ipath_ignorederrs));
+
+ if ((dd->ipath_maskederrs & ~dd->ipath_ignorederrs)
+ & ~(INFINIPATH_E_RRCVEGRFULL | INFINIPATH_E_RRCVHDRFULL))
+ ipath_dev_err(dd,
+ "Disabling error(s) %llx because occuring too frequently (%s)\n",
+ (unsigned long long) (dd->ipath_maskederrs & ~dd->
+ ipath_ignorederrs), msg);
+ else {
+ /*
+ * rcvegrfull and rcvhdrqfull are "normal",
+ * for some types of processes (mostly benchmarks)
+ * that send huge numbers of messages, while not
+ * processing them. So only complain about
+ * these at debug level.
+ */
+ ipath_dbg("Disabling frequent queue full errors (%s)\n",
+ msg);
+ }
+
+ /*
+ * re-enable the masked errors after around 3 minutes.
+ * in ipath_get_faststats(). If we have a series of
+ * fast repeating but different errors, the interval will keep
+ * stretching out, but that's OK, as that's pretty catastrophic.
+ */
+ dd->ipath_unmasktime = get_cycles() + 400000000000ULL;
+ }
+
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_errorclear, errs);
+ if (ignore_this_time)
+ errs &= ~ignore_this_time;
+ if (errs & ~dd->ipath_lasterror) {
+ errs &= ~dd->ipath_lasterror;
+ /* never suppress duplicate hwerrors or ibstatuschange */
+ dd->ipath_lasterror |= errs &
+ ~(INFINIPATH_E_HARDWARE | INFINIPATH_E_IBSTATUSCHANGED);
+ }
+ if (!errs)
+ return;
+
+ if (!noprint)
+ /* the ones we mask off are handled specially below or above */
+ ipath_decode_err(msg, sizeof msg,
+ errs & ~(INFINIPATH_E_IBSTATUSCHANGED |
+ INFINIPATH_E_RRCVEGRFULL |
+ INFINIPATH_E_RRCVHDRFULL |
+ INFINIPATH_E_HARDWARE));
+ else
+ *msg = 0; /* so we don't need if(!noprint) at strlcat's below */
+
+ if (errs & E_SUM_PKTERRS) {
+ ipath_stats.sps_pkterrs++;
+ chkerrpkts = 1;
+ }
+ if (errs & E_SUM_ERRS)
+ ipath_stats.sps_errs++;
+
+ if (errs & (INFINIPATH_E_RICRC | INFINIPATH_E_RVCRC)) {
+ ipath_stats.sps_crcerrs++;
+ chkerrpkts = 1;
+ }
+
+ /*
+ * We don't want to print these two as they happen, or we can make
+ * the situation even worse, because it takes so long to print messages.
+ * to serial consoles. kernel ports get printed from fast_stats, no
+ * more than every 5 seconds, user ports get printed on close
+ */
+ if (errs & INFINIPATH_E_RRCVHDRFULL) {
+ int any;
+ u32 hd, tl;
+ ipath_stats.sps_hdrqfull++;
+ for (any = i = 0; i < dd->ipath_cfgports; i++) {
+ if (i == 0) {
+ hd = dd->ipath_port0head;
+ tl = (uint32_t)__le64_to_cpu(*dd->ipath_hdrqtailptr);
+ } else if (dd->ipath_pd[i] &&
+ dd->ipath_pd[i]->port_cnt &&
+ dd->ipath_pd[i]->port_rcvhdrtail_kvaddr) {
+ /*
+ * don't report same point multiple times,
+ * except kernel
+ */
+ tl = (u32)
+ * dd->ipath_pd[i]->port_rcvhdrtail_kvaddr;
+ if (tl == dd->ipath_lastrcvhdrqtails[i])
+ continue;
+ hd = ipath_read_ureg32(dd, ur_rcvhdrhead, i);
+ } else
+ continue;
+ if (hd == (tl + 1) ||
+ (!hd && tl == dd->ipath_hdrqlast)) {
+ dd->ipath_lastrcvhdrqtails[i] = tl;
+ dd->ipath_pd[i]->port_hdrqfull++;
+ if (i == 0)
+ chkerrpkts = 1;
+ }
+ }
+ }
+ if (errs & INFINIPATH_E_RRCVEGRFULL) {
+ /*
+ * since this is of less importance and not likely to
+ * happen without also getting hdrfull, only count
+ * occurrences; don't check each port (or even the kernel
+ * vs user)
+ */
+ ipath_stats.sps_etidfull++;
+ if (dd->ipath_port0head !=
+ (uint32_t)__le64_to_cpu(*dd->ipath_hdrqtailptr))
+ chkerrpkts = 1;
+ }
+
+ /*
+ * do this before IBSTATUSCHANGED, in case both bits set in a single
+ * interrupt; we want the STATUSCHANGE to "win", so we do our
+ * internal copy of state machine correctly
+ */
+ if (errs & INFINIPATH_E_RIBLOSTLINK) {
+ /*
+ * force through block below
+ */
+ errs |= INFINIPATH_E_IBSTATUSCHANGED;
+ ipath_stats.sps_iblink++;
+ dd->ipath_flags |= IPATH_LINKDOWN;
+ dd->ipath_flags &= ~(IPATH_LINKUNK | IPATH_LINKINIT
+ | IPATH_LINKARMED | IPATH_LINKACTIVE);
+ *dd->ipath_statusp &= ~IPATH_STATUS_IB_READY;
+ if (!noprint)
+ ipath_dbg("Lost link, link now down (%s)\n",
+ ipath_ibcstatus_str[ipath_read_kreg64(dd, dd->ipath_kregs->kr_ibcstatus) & 0xf]);
+ }
+ if (errs & INFINIPATH_E_IBSTATUSCHANGED)
+ handle_e_ibstatuschanged(dd, errs, noprint);
+
+ if (errs & INFINIPATH_E_RESET) {
+ if (!noprint)
+ ipath_dev_err(dd,
+ "Got reset, requires re-initialization (unload and reload driver)\n");
+ dd->ipath_flags &= ~IPATH_INITTED; /* needs re-init */
+ /* mark as having had error */
+ *dd->ipath_statusp |= IPATH_STATUS_HWERROR;
+ *dd->ipath_statusp &= ~IPATH_STATUS_IB_CONF;
+ }
+
+ if (!noprint && *msg)
+ ipath_dev_err(dd, "%s error\n", msg);
+ if (dd->ipath_sma_state_wanted & dd->ipath_flags) {
+ ipath_cdbg(VERBOSE, "sma wanted state %x, iflags now %x, "
+ "waking\n", dd->ipath_sma_state_wanted,
+ dd->ipath_flags);
+ wake_up_interruptible(&ipath_sma_state_wait);
+ }
+
+ if (chkerrpkts)
+ ipath_kreceive(dd); /* process possible error packets in hdrq */
+}
+
+/* this is separate to allow for better optimization of ipath_intr() */
+
+static void ipath_bad_intr(struct ipath_devdata *dd, u32 * unexpectp)
+{
+ /*
+ * sometimes happen during driver init and unload, don't want
+ * to process any interrupts at that point
+ */
+
+ /* this is just a bandaid, not a fix, if something goes badly wrong */
+ if (++*unexpectp > 100) {
+ if (++*unexpectp > 105) {
+ /*
+ * ok, we must be taking somebody else's interrupts,
+ * due to a messed up mptable and/or PIRQ table, so
+ * unregister the interrupt. We've seen this
+ * during linuxbios development work, and it
+ * may happen in the future again.
+ */
+ if (dd->pcidev && dd->pcidev->irq) {
+ ipath_dev_err(dd,
+ "Now %u unexpected interrupts, unregistering interrupt handler\n",
+ *unexpectp);
+ ipath_dbg("free_irq of irq %x\n",
+ dd->pcidev->irq);
+ free_irq(dd->pcidev->irq, dd);
+ }
+ }
+ if (ipath_read_kreg32(dd, dd->ipath_kregs->kr_intmask)) {
+ ipath_dev_err(dd,
+ "%u unexpected interrupts, disabling interrupts completely\n",
+ *unexpectp);
+ /* disable all interrupts, something is very wrong */
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_intmask, 0ULL);
+ }
+ } else if (*unexpectp > 1)
+ ipath_dbg("Interrupt when not ready, should not happen, "
+ "ignoring\n");
+}
+
+static void ipath_bad_regread(struct ipath_devdata *dd)
+{
+ static int allbits;
+
+ /* separate routine, for better optimization of ipath_intr() */
+
+ /*
+ * We print the message and disable interrupts, in hope of
+ * having a better chance of debugging the problem.
+ */
+ ipath_dev_err(dd,
+ "Read of interrupt status failed (all bits set)\n");
+ if (allbits++) { /* disable all interrupts, something is very wrong */
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_intmask, 0ULL);
+ if (allbits == 2) {
+ ipath_dev_err(dd,
+ "Still bad interrupt status, unregistering interrupt\n");
+ free_irq(dd->pcidev->irq, dd);
+ } else if (allbits > 2) {
+ if ((allbits % 10000) == 0)
+ printk(".");
+ } else
+ ipath_dev_err(dd,
+ "Disabling interrupts, multiple errors\n");
+ }
+}
+
+irqreturn_t ipath_intr(int irq, void *data, struct pt_regs *regs)
+{
+ struct ipath_devdata *dd = data;
+ u32 istat = ipath_read_kreg32(dd, dd->ipath_kregs->kr_intstatus);
+ ipath_err_t estat = 0;
+ static unsigned unexpected = 0;
+
+ if (unlikely(!istat)) {
+ ipath_stats.sps_nullintr++;
+ return IRQ_NONE; /* not our interrupt, or already handled */
+ }
+ if (unlikely(istat == -1)) {
+ ipath_bad_regread(dd);
+ return IRQ_NONE; /* don't know if it was our interrupt or not */
+ }
+
+ ipath_stats.sps_ints++;
+
+ /*
+ * this needs to be flags&initted, not statusp, so we keep
+ * taking interrupts even after link goes down, etc.
+ * Also, we *must* clear the interrupt at some point, or we won't
+ * take it again, which can be real bad for errors, etc...
+ */
+
+ if (!(dd->ipath_flags & IPATH_INITTED)) {
+ ipath_bad_intr(dd, &unexpected);
+ return IRQ_NONE;
+ }
+ if (unexpected)
+ unexpected = 0;
+
+ ipath_cdbg(VERBOSE, "intr stat=0x%x\n", istat);
+
+ if (istat & ~infinipath_i_bitsextant)
+ ipath_dev_err(dd,
+ "interrupt with unknown interrupts %x set\n",
+ istat & (u32) ~ infinipath_i_bitsextant);
+
+ if (istat & INFINIPATH_I_ERROR) {
+ ipath_stats.sps_errints++;
+ estat = ipath_read_kreg64(dd, dd->ipath_kregs->kr_errorstatus);
+ if (!estat)
+ dev_info(&dd->pcidev->dev, "error interrupt (%x), "
+ "but no error bits set!\n", istat);
+ else if (estat == -1LL)
+ /*
+ * should we try clearing all, or hope next read
+ * works?
+ */
+ ipath_dev_err(dd,
+ "Read of error status failed (all bits set); ignoring\n");
+ else
+ handle_errors(dd, estat);
+ }
+
+ if (istat & INFINIPATH_I_GPIO) {
+ if (unlikely(!(dd->ipath_flags & IPATH_GPIO_INTR))) {
+ u32 gpiostatus;
+ gpiostatus = ipath_read_kreg32(dd,
+ dd->ipath_kregs->kr_gpio_status);
+ ipath_dbg("Unexpected GPIO interrupt bits %x\n",
+ gpiostatus);
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_gpio_clear,
+ gpiostatus);
+ }
+ else {
+ /* Clear GPIO status bit 2 */
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_gpio_clear,
+ (u64) (1 << 2));
+
+ /*
+ * Packets are available in the port 0 rcv queue.
+ * Eventually this needs to be generalized to check
+ * IPATH_GPIO_INTR, and the specific GPIO bit, if
+ * GPIO interrupts are used for anything else.
+ */
+ ipath_kreceive(dd);
+ }
+ }
+
+ /*
+ * clear the ones we will deal with on this round
+ * We clear it early, mostly for receive interrupts, so we
+ * know the chip will have seen this by the time we process
+ * the queue, and will re-interrupt if necessary. The processor
+ * itself won't take the interrupt again until we return.
+ */
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_intclear, istat);
+
+ if (istat & INFINIPATH_I_SPIOBUFAVAIL) {
+ clear_bit(IPATH_S_PIOINTBUFAVAIL, &dd->ipath_sendctrl);
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl,
+ dd->ipath_sendctrl);
+
+ if (dd->ipath_portpiowait) {
+ u32 i;
+ /*
+ * start from port 1, since for now port 0 is never using
+ * wait_event for PIO
+ */
+ for (i = 1;
+ dd->ipath_portpiowait && i < dd->ipath_cfgports;
+ i++) {
+ if (dd->ipath_pd[i] && dd->ipath_pd[i]->port_cnt
+ && dd->ipath_portpiowait & (1U << i)) {
+ clear_bit(i, &dd->ipath_portpiowait);
+ if (test_bit(IPATH_PORT_WAITING_PIO,
+ &dd->ipath_pd[i]->port_flag)) {
+ clear_bit(IPATH_PORT_WAITING_PIO,
+ &dd->ipath_pd[i]->port_flag);
+ wake_up_interruptible(&dd->
+ ipath_pd
+ [i]->
+ port_wait);
+ }
+ }
+ }
+ }
+
+ if (dd->ipath_layer.l_intr) {
+ if (dd->ipath_layer.l_intr(dd->ipath_unit,
+ IPATH_LAYER_INT_SEND_CONTINUE))
+ {
+ set_bit(IPATH_S_PIOINTBUFAVAIL,
+ &dd->ipath_sendctrl);
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl,
+ dd->ipath_sendctrl);
+ }
+ }
+
+ if (dd->verbs_layer.l_piobufavail) {
+ if (!dd->verbs_layer.l_piobufavail(dd->ipath_unit)) {
+ set_bit(IPATH_S_PIOINTBUFAVAIL,
+ &dd->ipath_sendctrl);
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl,
+ dd->ipath_sendctrl);
+ }
+ }
+ }
+
+ /*
+ * we check for both transition from empty to non-empty, and urgent
+ * packets (those with the interrupt bit set in the header)
+ */
+
+ if (istat & ((infinipath_i_rcvavail_mask << INFINIPATH_I_RCVAVAIL_SHIFT)
+ | (infinipath_i_rcvurg_mask << INFINIPATH_I_RCVURG_SHIFT))) {
+ u64 portr;
+ int i;
+ int rcvdint = 0;
+
+ portr = ((istat >> INFINIPATH_I_RCVAVAIL_SHIFT) &
+ infinipath_i_rcvavail_mask)
+ | ((istat >> INFINIPATH_I_RCVURG_SHIFT) &
+ infinipath_i_rcvurg_mask);
+ for (i = 0; i < dd->ipath_cfgports; i++) {
+ if (portr & (1 << i) && dd->ipath_pd[i] &&
+ dd->ipath_pd[i]->port_cnt) {
+ if (i == 0)
+ ipath_kreceive(dd);
+ else if (test_bit(IPATH_PORT_WAITING_RCV,
+ &dd->ipath_pd[i]->port_flag)) {
+ clear_bit(IPATH_PORT_WAITING_RCV,
+ &dd->ipath_pd[i]->port_flag);
+ clear_bit(1UL << (i+INFINIPATH_R_INTRAVAIL_SHIFT),
+ &dd->ipath_rcvctrl);
+ wake_up_interruptible(&dd->ipath_pd[i]->
+ port_wait);
+ rcvdint = 1;
+ }
+ }
+ }
+ if (rcvdint) {
+ /* only want to take one interrupt, so turn off the rcv interrupt
+ * for all the ports that we did the wakeup on (but never for
+ * kernel port)
+ */
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl,
+ dd->ipath_rcvctrl);
+ }
+ }
+
+ return IRQ_HANDLED;
+}
diff -r 696ba12283f4 -r a9ed49ad489c drivers/infiniband/hw/ipath/ipath_stats.c
--- /dev/null Thu Jan 1 00:00:00 1970 +0000
+++ b/drivers/infiniband/hw/ipath/ipath_stats.c Thu Mar 9 16:15:49 2006 -0800
@@ -0,0 +1,274 @@
+/*
+ * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/pci.h>
+
+#include "ipath_kernel.h"
+
+struct infinipath_stats ipath_stats;
+
+/**
+ * ipath_snap_cntr - snapshot a chip counter
+ * @dd: the infinipath device
+ * @creg: the counter to snapshot
+ *
+ * called from add_timer and user counter read calls, to deal with
+ * counters that wrap in "human time". The words sent and received, and
+ * the packets sent and received are all that we worry about. For now,
+ * at least, we don't worry about error counters, because if they wrap
+ * that quickly, we probably don't care. We may eventually just make this
+ * handle all the counters. word counters can wrap in about 20 seconds
+ * of full bandwidth traffic, packet counters in a few hours.
+ */
+
+u64 ipath_snap_cntr(struct ipath_devdata *dd, ipath_creg creg)
+{
+ u32 val, reg64 = 0;
+ u64 val64;
+ unsigned long t0, t1;
+
+ t0 = jiffies;
+ /* If fast increment counters are only 32 bits, snapshot them,
+ * and maintain them as 64bit values in the driver */
+ if (!(dd->ipath_flags & IPATH_32BITCOUNTERS) &&
+ (creg == dd->ipath_cregs->cr_wordsendcnt ||
+ creg == dd->ipath_cregs->cr_wordrcvcnt ||
+ creg == dd->ipath_cregs->cr_pktsendcnt ||
+ creg == dd->ipath_cregs->cr_pktrcvcnt)) {
+ val64 = ipath_read_creg(dd, creg);
+ val = val64 == ~0ULL ? ~0U : 0;
+ reg64 = 1;
+ } else /* val64 just to keep gcc quiet... */
+ val64 = val = ipath_read_creg32(dd, creg);
+ /*
+ * See if a second has passed. This is just a way to detect
+ * things that are quite broken. Normally this should take
+ * just a few cycles (the check is for long enough that we
+ * don't care if we get pre-empted.) An Opteron HT O read
+ * timeout is 4 seconds with normal NB values
+ */
+ t1 = jiffies;
+ if (time_before(t0 + HZ, t1) && val == -1) {
+ ipath_dev_err(dd, "Error! Reading counter 0x%x timed out\n",
+ creg);
+ return 0ULL;
+ }
+ if (reg64)
+ return val64;
+
+ if (creg == dd->ipath_cregs->cr_wordsendcnt) {
+ if (val != dd->ipath_lastsword) {
+ dd->ipath_sword += val - dd->ipath_lastsword;
+ dd->ipath_lastsword = val;
+ }
+ val64 = dd->ipath_sword;
+ } else if (creg == dd->ipath_cregs->cr_wordrcvcnt) {
+ if (val != dd->ipath_lastrword) {
+ dd->ipath_rword += val - dd->ipath_lastrword;
+ dd->ipath_lastrword = val;
+ }
+ val64 = dd->ipath_rword;
+ } else if (creg == dd->ipath_cregs->cr_pktsendcnt) {
+ if (val != dd->ipath_lastspkts) {
+ dd->ipath_spkts += val - dd->ipath_lastspkts;
+ dd->ipath_lastspkts = val;
+ }
+ val64 = dd->ipath_spkts;
+ } else if (creg == dd->ipath_cregs->cr_pktrcvcnt) {
+ if (val != dd->ipath_lastrpkts) {
+ dd->ipath_rpkts += val - dd->ipath_lastrpkts;
+ dd->ipath_lastrpkts = val;
+ }
+ val64 = dd->ipath_rpkts;
+ } else
+ val64 = (u64) val;
+
+ return val64;
+}
+
+/**
+ * ipath_qcheck - print the delta of egrfull/hdrqfull errors for kernel ports
+ * @dd: the infinipath device
+ *
+ * print the delta of egrfull/hdrqfull errors for kernel ports no more
+ * than every 5 seconds. User processes are printed at close, but kernel
+ * doesn't close, so... Separate routine so may call from other places
+ * someday, and so function name when printed by _IPATH_INFO is meaningfull
+ */
+static void ipath_qcheck(struct ipath_devdata *dd)
+{
+ static u64 last_tot_hdrqfull;
+ size_t blen = 0;
+ char buf[128];
+
+ *buf = 0;
+ if (dd->ipath_pd[0]->port_hdrqfull != dd->ipath_p0_hdrqfull) {
+ blen = snprintf(buf, sizeof buf, "port 0 hdrqfull %u",
+ dd->ipath_pd[0]->port_hdrqfull -
+ dd->ipath_p0_hdrqfull);
+ dd->ipath_p0_hdrqfull = dd->ipath_pd[0]->port_hdrqfull;
+ }
+ if (ipath_stats.sps_etidfull != dd->ipath_last_tidfull) {
+ blen +=
+ snprintf(buf + blen, sizeof buf - blen, "%srcvegrfull %llu",
+ blen ? ", " : "",
+ (unsigned long long) (ipath_stats.sps_etidfull - dd->ipath_last_tidfull));
+ dd->ipath_last_tidfull = ipath_stats.sps_etidfull;
+ }
+
+ /*
+ * this is actually the number of hdrq full interrupts, not actual
+ * events, but at the moment that's mostly what I'm interested in.
+ * Actual count, etc. is in the counters, if needed. For production
+ * users this won't ordinarily be printed.
+ */
+
+ if ((ipath_debug & (__IPATH_PKTDBG | __IPATH_DBG)) &&
+ ipath_stats.sps_hdrqfull != last_tot_hdrqfull) {
+ blen +=
+ snprintf(buf + blen, sizeof buf - blen,
+ "%shdrqfull %llu (all ports)", blen ? ", " : "",
+ (unsigned long long) (ipath_stats.sps_hdrqfull - last_tot_hdrqfull));
+ last_tot_hdrqfull = ipath_stats.sps_hdrqfull;
+ }
+ if (blen)
+ ipath_dbg("%s\n", buf);
+
+ if (dd->ipath_port0head !=
+ (uint32_t)__le64_to_cpu(*dd->ipath_hdrqtailptr)) {
+ if (dd->ipath_lastport0rcv_cnt == ipath_stats.sps_port0pkts) {
+ ipath_cdbg(PKT, "missing rcv interrupts? port0 hd=%llx tl=%x; port0pkts %llx\n",
+ (unsigned long long) __le64_to_cpu(*dd->ipath_hdrqtailptr),
+ dd->ipath_port0head,
+ (unsigned long long) ipath_stats.sps_port0pkts);
+ ipath_kreceive(dd);
+ }
+ dd->ipath_lastport0rcv_cnt = ipath_stats.sps_port0pkts;
+ }
+}
+
+/**
+ * ipath_get_faststats - get word counters from chip before they can overflow
+ * @opaque - contains a pointer to the infinipath device ipath_devdata
+ *
+ * called from add_timer
+ */
+void ipath_get_faststats(unsigned long opaque)
+{
+ struct ipath_devdata *dd = (struct ipath_devdata *) opaque;
+ u32 val;
+ static unsigned cnt;
+
+ /* don't access the chip while running diags, or memory diags can fail */
+ if (!dd->ipath_kregbase || !(dd->ipath_flags & IPATH_PRESENT) ||
+ ipath_diag_alive)
+ /* but re-arm the timer, for diags case; won't hurt other */
+ goto done;
+
+ if (dd->ipath_flags & IPATH_32BITCOUNTERS) {
+ ipath_snap_cntr(dd, dd->ipath_cregs->cr_wordsendcnt);
+ ipath_snap_cntr(dd, dd->ipath_cregs->cr_wordrcvcnt);
+ ipath_snap_cntr(dd, dd->ipath_cregs->cr_pktsendcnt);
+ ipath_snap_cntr(dd, dd->ipath_cregs->cr_pktrcvcnt);
+ }
+
+ ipath_qcheck(dd);
+
+ /*
+ * deal with repeat error suppression. Doesn't really matter if
+ * last error was almost a full interval ago, or just a few usecs
+ * ago; still won't get more than 2 per interval. We may want
+ * longer intervals for this eventually, could do with mod, counter
+ * or separate timer. Also see code in ipath_handle_errors() and
+ * ipath_handle_hwerrors().
+ */
+
+ if (dd->ipath_lasterror)
+ dd->ipath_lasterror = 0;
+ if (dd->ipath_lasthwerror)
+ dd->ipath_lasthwerror = 0;
+ if ((dd->ipath_maskederrs & ~dd->ipath_ignorederrs)
+ && get_cycles() > dd->ipath_unmasktime) {
+ char ebuf[256];
+ ipath_decode_err(ebuf, sizeof ebuf,
+ (dd->ipath_maskederrs & ~dd->
+ ipath_ignorederrs));
+ if ((dd->ipath_maskederrs & ~dd->
+ ipath_ignorederrs)
+ & ~(INFINIPATH_E_RRCVEGRFULL | INFINIPATH_E_RRCVHDRFULL)) {
+ ipath_dev_err(dd, "Re-enabling masked errors (%s)\n",
+ ebuf);
+ } else {
+ /*
+ * rcvegrfull and rcvhdrqfull are "normal", for some types of
+ * processes (mostly benchmarks) that send huge numbers
+ * of messages, while not processing them. So only complain
+ * about these at debug level.
+ */
+ ipath_dbg("Disabling frequent queue full errors (%s)\n",
+ ebuf);
+ }
+ dd->ipath_maskederrs = dd->ipath_ignorederrs;
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_errormask,
+ ~dd->ipath_maskederrs);
+ }
+
+ /* limit qfull messages to ~one per minute per port */
+ if ((++cnt & 0x10)) {
+ for (val = dd->ipath_cfgports - 1; ((int)val) >= 0;
+ val--) {
+ if (dd->ipath_lastegrheads[val] != -1)
+ dd->ipath_lastegrheads[val] = -1;
+ if (dd->ipath_lastrcvhdrqtails[val] != -1)
+ dd->ipath_lastrcvhdrqtails[val] = -1;
+ }
+ }
+
+ if (dd->ipath_nosma_bufs) {
+ dd->ipath_nosma_secs += 5;
+ if (dd->ipath_nosma_secs >= 30) {
+ ipath_cdbg(SMA, "No SMA bufs avail %u seconds; cancelling pending sends\n",
+ dd->ipath_nosma_secs);
+ ipath_disarm_piobufs(dd,
+ dd->ipath_lastport_piobuf,
+ dd->ipath_piobcnt2k +
+ dd->ipath_piobcnt4k -
+ dd->ipath_lastport_piobuf);
+ dd->ipath_nosma_secs = 0; /* start again, if necessary */
+ } else
+ ipath_cdbg(SMA, "No SMA bufs avail %u tries, after %u seconds\n",
+ dd->ipath_nosma_bufs, dd->ipath_nosma_secs);
+ }
+
+done:
+ mod_timer(&dd->ipath_stats_timer, jiffies + HZ * 5);
+}
diff -r 696ba12283f4 -r a9ed49ad489c drivers/infiniband/hw/ipath/ipath_wc_x86_64.c
--- /dev/null Thu Jan 1 00:00:00 1970 +0000
+++ b/drivers/infiniband/hw/ipath/ipath_wc_x86_64.c Thu Mar 9 16:15:49 2006 -0800
@@ -0,0 +1,155 @@
+/*
+ * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+/*
+ * This file is conditionally built on x86_64 only. Otherwise weak symbol
+ * versions of the functions exported from here are used.
+ */
+
+#include <linux/pci.h>
+#include <asm/mtrr.h>
+#include <asm/processor.h>
+
+#include "ipath_kernel.h"
+
+/**
+ * ipath_enable_wc - enable write combining for MMIO writes to the device
+ * @dd: infinipath device
+ *
+ * This routine is x86_64-specific; it twiddles the CPU's MTRRs to enable
+ * write combining.
+ */
+int ipath_enable_wc(struct ipath_devdata *dd)
+{
+ int ret = 0;
+ u64 pioaddr, piolen;
+ unsigned bits;
+ const unsigned long addr = pci_resource_start(dd->pcidev, 0);
+ const size_t len = pci_resource_len(dd->pcidev, 0);
+
+ /*
+ * Set the PIO buffers to be WCCOMB, so we get HT bursts to the
+ * chip. Linux (possibly the hardware) requires it to be on a power
+ * of 2 address matching the length (which has to be a power of 2).
+ * For rev1, that means the base address, for rev2, it will be just
+ * the PIO buffers themselves.
+ */
+ pioaddr = addr + dd->ipath_piobufbase;
+ piolen = (dd->ipath_piobcnt2k +
+ dd->ipath_piobcnt4k) *
+ ALIGN(dd->ipath_piobcnt2k +
+ dd->ipath_piobcnt4k, dd->ipath_palign);
+
+ for (bits = 0; !(piolen & (1ULL << bits)); bits++)
+ /* do nothing */ ;
+
+ if (piolen != (1ULL << bits)) {
+ piolen >>= bits;
+ while (piolen >>= 1)
+ bits++;
+ piolen = 1ULL << (bits + 1);
+ }
+ if (pioaddr & (piolen - 1)) {
+ u64 atmp;
+ ipath_dbg("pioaddr %llx not on right boundary for size "
+ "%llx, fixing\n",
+ (unsigned long long) pioaddr,
+ (unsigned long long) piolen);
+ atmp = pioaddr & ~(piolen - 1);
+ if (atmp < addr || (atmp + piolen) > (addr + len)) {
+ ipath_dev_err(dd, "No way to align address/size "
+ "(%llx/%llx), no WC mtrr\n",
+ (unsigned long long) atmp,
+ (unsigned long long) piolen << 1);
+ ret = -ENODEV;
+ } else {
+ ipath_dbg("changing WC base from %llx to %llx, "
+ "len from %llx to %llx\n",
+ (unsigned long long) pioaddr,
+ (unsigned long long) atmp,
+ (unsigned long long) piolen,
+ (unsigned long long) piolen << 1);
+ pioaddr = atmp;
+ piolen <<= 1;
+ }
+ }
+
+ if (!ret) {
+ int cookie;
+ ipath_cdbg(VERBOSE, "Setting mtrr for chip to WC "
+ "(addr %llx, len=0x%llx)\n",
+ (unsigned long long) pioaddr,
+ (unsigned long long) piolen);
+ cookie = mtrr_add(pioaddr, piolen, MTRR_TYPE_WRCOMB, 0);
+ if (cookie < 0) {
+ dev_info(&dd->pcidev->dev,
+ "mtrr_add(%llx,0x%llx,WC,0) failed "
+ "(%d)\n", (unsigned long long) pioaddr,
+ (unsigned long long) piolen, cookie);
+ ret = -EINVAL;
+ } else {
+ ipath_cdbg(VERBOSE, "Set mtrr for chip to WC, "
+ "cookie is %d\n", cookie);
+ dd->ipath_wc_cookie = cookie;
+ }
+ }
+
+ return ret;
+}
+
+/**
+ * ipath_disable_wc - disable write combining for MMIO writes to the device
+ * @dd: infinipath device
+ */
+void ipath_disable_wc(struct ipath_devdata *dd)
+{
+ if (dd->ipath_wc_cookie) {
+ ipath_cdbg(VERBOSE, "undoing WCCOMB on pio buffers\n");
+ mtrr_del(dd->ipath_wc_cookie, 0, 0);
+ dd->ipath_wc_cookie = 0;
+ }
+}
+
+/**
+ * ipath_unordered_wc - indicate whether write combining is ordered
+ *
+ * Because our performance depends on our ability to do write combining mmio
+ * writes in the most efficient way, we need to know if we are on an Intel
+ * or AMD x86_64 processor. AMD x86_64 processors flush WC buffers out in
+ * the order completed, and so no special flushing is required to get
+ * correct ordering. Intel processors, however, will flush write buffers
+ * out in "random" orders, and so explict ordering is needed at times.
+ */
+int ipath_unordered_wc(void)
+{
+ return boot_cpu_data.x86_vendor == X86_VENDOR_INTEL;
+}
^ permalink raw reply [flat|nested] 70+ messages in thread* [PATCH 8 of 20] ipath - sysfs support for core driver
2006-03-10 0:35 [PATCH 0 of 20] [RFC] ipath driver - another round for review Bryan O'Sullivan
` (6 preceding siblings ...)
2006-03-10 0:35 ` [PATCH 7 of 20] ipath - misc driver support code Bryan O'Sullivan
@ 2006-03-10 0:35 ` Bryan O'Sullivan
2006-03-10 1:11 ` Greg KH
2006-03-10 0:35 ` [PATCH 9 of 20] ipath - char devices for diagnostics and lightweight subnet management Bryan O'Sullivan
` (12 subsequent siblings)
20 siblings, 1 reply; 70+ messages in thread
From: Bryan O'Sullivan @ 2006-03-10 0:35 UTC (permalink / raw)
To: rolandd, gregkh, akpm, davem; +Cc: linux-kernel, openib-general
Signed-off-by: Bryan O'Sullivan <bos@pathscale.com>
diff -r a9ed49ad489c -r 1123028ac13a drivers/infiniband/hw/ipath/ipath_sysfs.c
--- /dev/null Thu Jan 1 00:00:00 1970 +0000
+++ b/drivers/infiniband/hw/ipath/ipath_sysfs.c Thu Mar 9 16:15:57 2006 -0800
@@ -0,0 +1,950 @@
+/*
+ * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/ctype.h>
+#include <linux/pci.h>
+
+#include "ipath_kernel.h"
+#include "ips_common.h"
+#include "ipath_layer.h"
+
+/**
+ * ipath_parse_ushort - parse an unsigned short value in an arbitrary base
+ * @str: the string containing the number
+ * @valp: where to put the result
+ *
+ * returns the number of bytes consumed, or negative value on error
+ */
+int ipath_parse_ushort(const char *str, unsigned short *valp)
+{
+ unsigned long val;
+ char *end;
+ int ret;
+
+ if (!isdigit(str[0]))
+ return -EINVAL;
+
+ val = simple_strtoul(str, &end, 0);
+
+ if (val > 0xffff)
+ return -EINVAL;
+
+ *valp = val;
+
+ ret = end + 1 - str;
+ if (ret == 0)
+ ret = -EINVAL;
+
+ return ret;
+}
+
+static ssize_t show_version(struct device_driver *dev, char *buf)
+{
+ /* The string printed here is already newline-terminated. */
+ return scnprintf(buf, PAGE_SIZE, "%s", ipath_core_version);
+}
+
+static ssize_t show_num_units(struct device_driver *dev, char *buf)
+{
+ return scnprintf(buf, PAGE_SIZE, "%d\n",
+ ipath_count_units(NULL, NULL, NULL));
+}
+
+#define DRIVER_STAT(name, attr) \
+ static ssize_t show_stat_##name(struct device_driver *dev, \
+ char *buf) \
+ { \
+ return scnprintf( \
+ buf, PAGE_SIZE, "%llu\n", \
+ (unsigned long long) ipath_stats.sps_ ##attr); \
+ } \
+ static DRIVER_ATTR(name, S_IRUGO, show_stat_##name, NULL)
+
+DRIVER_STAT(intrs, ints);
+DRIVER_STAT(err_intrs, errints);
+DRIVER_STAT(errs, errs);
+DRIVER_STAT(pkt_errs, pkterrs);
+DRIVER_STAT(crc_errs, crcerrs);
+DRIVER_STAT(hw_errs, hwerrs);
+DRIVER_STAT(ib_link, iblink);
+DRIVER_STAT(port0_pkts, port0pkts);
+DRIVER_STAT(ether_spkts, ether_spkts);
+DRIVER_STAT(ether_rpkts, ether_rpkts);
+DRIVER_STAT(sma_spkts, sma_spkts);
+DRIVER_STAT(sma_rpkts, sma_rpkts);
+DRIVER_STAT(hdrq_full, hdrqfull);
+DRIVER_STAT(etid_full, etidfull);
+DRIVER_STAT(no_piobufs, nopiobufs);
+DRIVER_STAT(ports, ports);
+DRIVER_STAT(pkey0, pkeys[0]);
+DRIVER_STAT(pkey1, pkeys[1]);
+DRIVER_STAT(pkey2, pkeys[2]);
+DRIVER_STAT(pkey3, pkeys[3]);
+/* XXX fix the following when dynamic table of devices used */
+DRIVER_STAT(lid0, lid[0]);
+DRIVER_STAT(lid1, lid[1]);
+DRIVER_STAT(lid2, lid[2]);
+DRIVER_STAT(lid3, lid[3]);
+
+DRIVER_STAT(nports, nports);
+DRIVER_STAT(null_intr, nullintr);
+DRIVER_STAT(max_pkts_call, maxpkts_call);
+DRIVER_STAT(avg_pkts_call, avgpkts_call);
+DRIVER_STAT(page_locks, pagelocks);
+DRIVER_STAT(page_unlocks, pageunlocks);
+DRIVER_STAT(krdrops, krdrops);
+/* XXX fix the following when dynamic table of devices used */
+DRIVER_STAT(mlid0, mlid[0]);
+DRIVER_STAT(mlid1, mlid[1]);
+DRIVER_STAT(mlid2, mlid[2]);
+DRIVER_STAT(mlid3, mlid[3]);
+
+static struct attribute *driver_stat_attributes[] = {
+ &driver_attr_intrs.attr,
+ &driver_attr_err_intrs.attr,
+ &driver_attr_errs.attr,
+ &driver_attr_pkt_errs.attr,
+ &driver_attr_crc_errs.attr,
+ &driver_attr_hw_errs.attr,
+ &driver_attr_ib_link.attr,
+ &driver_attr_port0_pkts.attr,
+ &driver_attr_ether_spkts.attr,
+ &driver_attr_ether_rpkts.attr,
+ &driver_attr_sma_spkts.attr,
+ &driver_attr_sma_rpkts.attr,
+ &driver_attr_hdrq_full.attr,
+ &driver_attr_etid_full.attr,
+ &driver_attr_no_piobufs.attr,
+ &driver_attr_ports.attr,
+ &driver_attr_pkey0.attr,
+ &driver_attr_pkey1.attr,
+ &driver_attr_pkey2.attr,
+ &driver_attr_pkey3.attr,
+ &driver_attr_lid0.attr,
+ &driver_attr_lid1.attr,
+ &driver_attr_lid2.attr,
+ &driver_attr_lid3.attr,
+ &driver_attr_nports.attr,
+ &driver_attr_null_intr.attr,
+ &driver_attr_max_pkts_call.attr,
+ &driver_attr_avg_pkts_call.attr,
+ &driver_attr_page_locks.attr,
+ &driver_attr_page_unlocks.attr,
+ &driver_attr_krdrops.attr,
+ &driver_attr_mlid0.attr,
+ &driver_attr_mlid1.attr,
+ &driver_attr_mlid2.attr,
+ &driver_attr_mlid3.attr,
+ NULL
+};
+
+static struct attribute_group driver_stat_attr_group = {
+ .name = "stats",
+ .attrs = driver_stat_attributes
+};
+
+static ssize_t show_atomic_stats(struct device_driver *dev, char *buf)
+{
+ memcpy(buf, &ipath_stats, sizeof(ipath_stats));
+
+ return sizeof(ipath_stats);
+}
+
+static ssize_t show_status(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct ipath_devdata *dd = dev_get_drvdata(dev);
+
+ if (!dd->ipath_statusp)
+ return -EINVAL;
+
+ return scnprintf(buf, PAGE_SIZE, "0x%llx\n",
+ (unsigned long long) *(dd->ipath_statusp));
+}
+
+static const char *ipath_status_str[] = {
+ "Initted",
+ "Disabled",
+ "4", /* unused */
+ "OIB_SMA",
+ "SMA",
+ "Present",
+ "IB_link_up",
+ "IB_configured",
+ "NoIBcable",
+ "Fatal_Hardware_Error",
+ NULL,
+};
+
+static ssize_t show_status_str(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct ipath_devdata *dd = dev_get_drvdata(dev);
+ int i, any;
+ u64 s;
+
+ if (!dd->ipath_statusp)
+ return -EINVAL;
+
+ s = *(dd->ipath_statusp);
+ *buf = '\0';
+ for (any = i = 0; s && ipath_status_str[i]; i++) {
+ if (s & 1) {
+ if (any && strlcat(buf, " ", PAGE_SIZE) >=
+ PAGE_SIZE)
+ /* overflow */
+ break;
+ if (strlcat(buf, ipath_status_str[i],
+ PAGE_SIZE) >= PAGE_SIZE)
+ break;
+ any = 1;
+ }
+ s >>= 1;
+ }
+ if (any)
+ strlcat(buf, "\n", PAGE_SIZE);
+
+ return strlen(buf);
+}
+
+static ssize_t show_boardversion(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct ipath_devdata *dd = dev_get_drvdata(dev);
+ /* The string printed here is already newline-terminated. */
+ return scnprintf(buf, PAGE_SIZE, "%s", dd->ipath_boardversion);
+}
+
+static ssize_t show_node_info(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ static const size_t count = 10;
+ struct ipath_devdata *dd = dev_get_drvdata(dev);
+ u32 *nodeinfo;
+ int ret;
+
+ if (!dd->ipath_statusp) {
+ ret = -EINVAL;
+ goto bail;
+ }
+
+ nodeinfo = (u32 *) buf;
+
+ /* so we only initialize non-zero fields. */
+ memset(nodeinfo, 0, count * sizeof(u32));
+
+ nodeinfo[0] = /* BaseVersion is SMA */
+ /* ClassVersion is SMA */
+ (1 << 8) /* NodeType */
+ |(1 << 0); /* NumPorts */
+ nodeinfo[1] = (u32) (dd->ipath_guid >> 32);
+ nodeinfo[2] = (u32) (dd->ipath_guid & 0xffffffff);
+ /* PortGUID == SystemImageGUID for us */
+ nodeinfo[3] = nodeinfo[1];
+ /* PortGUID == SystemImageGUID for us */
+ nodeinfo[4] = nodeinfo[2];
+ /* PortGUID == NodeGUID for us */
+ nodeinfo[5] = nodeinfo[3];
+ /* PortGUID == NodeGUID for us */
+ nodeinfo[6] = nodeinfo[4];
+ nodeinfo[7] = (4 << 16) /* we support 4 pkeys */
+ |(dd->ipath_deviceid << 0);
+ /* our chip version as 16 bits major, 16 bits minor */
+ nodeinfo[8] = dd->ipath_minrev | (dd->ipath_majrev << 16);
+ nodeinfo[9] = (dd->ipath_unit << 24) | (dd->ipath_vendorid << 0);
+
+ ret = count * sizeof(u32);
+bail:
+ return ret;
+}
+
+static ssize_t show_port_info(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ static const size_t count = 13;
+ int ret;
+ u32 tmp, tmp2;
+ struct ipath_devdata *dd = dev_get_drvdata(dev);
+ u32 *portinfo;
+
+ if (!dd->ipath_statusp) {
+ ret = -EINVAL;
+ goto bail;
+ }
+
+ portinfo = (u32 *) buf;
+
+ /* so we only initialize non-zero fields. */
+ memset(portinfo, 0, count * sizeof portinfo);
+
+ /*
+ * Notimpl yet M_Key (64)
+ * Notimpl yet GID (64)
+ */
+
+ portinfo[4] = (dd->ipath_lid << 16);
+
+ /*
+ * Notimpl yet SMLID (should we store this in the driver, in case
+ * SMA dies?) CapabilityMask is 0, we don't support any of these
+ * DiagCode is 0; we don't store any diag info for now Notimpl yet
+ * M_KeyLeasePeriod (we don't support M_Key)
+ */
+
+ /* LocalPortNum is whichever port number they ask for */
+ portinfo[7] = (dd->ipath_unit << 24)
+ /* LinkWidthEnabled */
+ | (2 << 16)
+ /* LinkWidthSupported (really 2, but not IB valid) */
+ | (3 << 8)
+ /* LinkWidthActive */
+ | (2 << 0);
+ tmp = dd->ipath_lastibcstat & IPATH_IBSTATE_MASK;
+ tmp2 = 5;
+ if (tmp == IPATH_IBSTATE_INIT)
+ tmp = 2;
+ else if (tmp == IPATH_IBSTATE_ARM)
+ tmp = 3;
+ else if (tmp == IPATH_IBSTATE_ACTIVE)
+ tmp = 4;
+ else {
+ tmp = 0; /* down */
+ tmp2 = tmp & 0xf;
+ }
+
+ portinfo[8] = (1 << 28) /* LinkSpeedSupported */
+ |(tmp << 24) /* PortState */
+ |(tmp2 << 20) /* PortPhysicalState */
+ |(2 << 16)
+
+ /* LinkDownDefaultState */
+ /* M_KeyProtectBits == 0 */
+ /* NotImpl yet LMC == 0 (we can support all values) */
+ | (1 << 4) /* LinkSpeedActive */
+ |(1 << 0); /* LinkSpeedEnabled */
+ switch (dd->ipath_ibmtu) {
+ case 4096:
+ tmp = 5;
+ break;
+ case 2048:
+ tmp = 4;
+ break;
+ case 1024:
+ tmp = 3;
+ break;
+ case 512:
+ tmp = 2;
+ break;
+ case 256:
+ tmp = 1;
+ break;
+ default: /* oops, something is wrong */
+ ipath_dbg("Problem, ipath_ibmtu 0x%x not a valid IB MTU, "
+ "treat as 2048\n", dd->ipath_ibmtu);
+ tmp = 4;
+ break;
+ }
+ portinfo[9] = (tmp << 28)
+ /* NeighborMTU */
+ /* Notimpl MasterSMSL */
+ | (1 << 20)
+
+ /* VLCap */
+ /* Notimpl InitType (actually, an SMA decision) */
+ /* VLHighLimit is 0 (only one VL) */
+ ; /* VLArbitrationHighCap is 0 (only one VL) */
+ portinfo[10] = /* VLArbitrationLowCap is 0 (only one VL) */
+ /* InitTypeReply is SMA decision */
+ (5 << 16) /* MTUCap 4096 */
+ |(7 << 13) /* VLStallCount */
+ |(0x1f << 8) /* HOQLife */
+ |(1 << 4)
+
+ /* OperationalVLs 0 */
+ /* PartitionEnforcementInbound */
+ /* PartitionEnforcementOutbound not enforced */
+ /* FilterRawinbound not enforced */
+ ; /* FilterRawOutbound not enforced */
+ /* M_KeyViolations are not counted by hardware, SMA can count */
+ tmp = ipath_read_creg32(dd, dd->ipath_cregs->cr_errpkey);
+ /* P_KeyViolations are counted by hardware. */
+ portinfo[11] = ((tmp & 0xffff) << 0);
+ portinfo[12] =
+ /* Q_KeyViolations are not counted by hardware */
+ (1 << 8)
+
+ /* GUIDCap */
+ /* SubnetTimeOut handled by SMA */
+ /* RespTimeValue handled by SMA */
+ ;
+ /* LocalPhyErrors are programmed to max */
+ portinfo[12] |= (0xf << 20)
+ | (0xf << 16) /* OverRunErrors are programmed to max */
+ ;
+
+ ret = count * sizeof(u32);
+bail:
+ return ret;
+}
+
+static ssize_t show_lid(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct ipath_devdata *dd = dev_get_drvdata(dev);
+
+ return scnprintf(buf, PAGE_SIZE, "0x%x\n", dd->ipath_lid);
+}
+
+static ssize_t store_lid(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf,
+ size_t count)
+{
+ struct ipath_devdata *dd = dev_get_drvdata(dev);
+ u16 lid;
+ int ret;
+
+ ret = ipath_parse_ushort(buf, &lid);
+ if (ret < 0)
+ goto invalid;
+
+ if (lid == 0 || lid >= 0xc000) {
+ ret = -EINVAL;
+ goto invalid;
+ }
+
+ ipath_set_sps_lid(dd, lid, 0);
+
+ goto bail;
+invalid:
+ dev_err(dev, "attempt to set invalid LID\n");
+bail:
+ return ret;
+}
+
+static ssize_t show_mlid(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct ipath_devdata *dd = dev_get_drvdata(dev);
+
+ return scnprintf(buf, PAGE_SIZE, "0x%x\n", dd->ipath_mlid);
+}
+
+static ssize_t store_mlid(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf,
+ size_t count)
+{
+ struct ipath_devdata *dd = dev_get_drvdata(dev);
+ int unit;
+ u16 mlid;
+ int ret;
+
+ ret = ipath_parse_ushort(buf, &mlid);
+ if (ret < 0)
+ goto invalid;
+
+ unit = dd->ipath_unit;
+
+ dd->ipath_mlid = mlid;
+ ipath_stats.sps_mlid[unit] = mlid;
+ if (dd->ipath_layer.l_intr)
+ dd->ipath_layer.l_intr(unit, IPATH_LAYER_INT_BCAST);
+
+ goto bail;
+invalid:
+ dev_err(dev, "attempt to set invalid MLID\n");
+bail:
+ return ret;
+}
+
+static ssize_t show_guid(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct ipath_devdata *dd = dev_get_drvdata(dev);
+ u8 *guid;
+
+ guid = (u8 *) & (dd->ipath_guid);
+
+ return scnprintf(buf, PAGE_SIZE,
+ "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
+ guid[0], guid[1], guid[2], guid[3],
+ guid[4], guid[5], guid[6], guid[7]);
+}
+
+static ssize_t store_guid(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf,
+ size_t count)
+{
+ struct ipath_devdata *dd = dev_get_drvdata(dev);
+ ssize_t ret;
+ unsigned short guid[8];
+ u64 nguid;
+ u8 *ng;
+ int i;
+
+ if (sscanf(buf, "%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx",
+ &guid[0], &guid[1], &guid[2], &guid[3],
+ &guid[4], &guid[5], &guid[6], &guid[7]) != 8)
+ goto invalid;
+
+ ng = (u8 *) &nguid;
+
+ for (i = 0; i < 8; i++) {
+ if (guid[i] > 0xff)
+ goto invalid;
+ ng[i] = guid[i];
+ }
+
+ dd->ipath_guid = nguid;
+ dd->ipath_nguid = 1;
+
+ ret = strlen(buf);
+ goto bail;
+
+invalid:
+ dev_err(dev, "attempt to set invalid GUID\n");
+ ret = -EINVAL;
+
+bail:
+ return ret;
+}
+
+static ssize_t show_nguid(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct ipath_devdata *dd = dev_get_drvdata(dev);
+
+ return scnprintf(buf, PAGE_SIZE, "%u\n", dd->ipath_nguid);
+}
+
+static ssize_t show_serial(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct ipath_devdata *dd = dev_get_drvdata(dev);
+
+ buf[sizeof dd->ipath_serial] = '\0';
+ memcpy(buf, dd->ipath_serial, sizeof dd->ipath_serial);
+ strcat(buf, "\n");
+ return strlen(buf);
+}
+
+static ssize_t show_unit(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct ipath_devdata *dd = dev_get_drvdata(dev);
+
+ return scnprintf(buf, PAGE_SIZE, "%u\n", dd->ipath_unit);
+}
+
+static ssize_t show_atomic_counters(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct ipath_devdata *dd = dev_get_drvdata(dev);
+ u64 *ubuf = (u64 *) buf;
+ u64 val;
+ u16 i;
+
+ for (i = 0; i < sizeof(struct infinipath_counters) /
+ sizeof(val); i++)
+ ubuf[i] = ipath_snap_cntr(dd, i);
+
+ return i * sizeof(val);
+}
+
+#define DEVICE_COUNTER(name, attr) \
+ static ssize_t show_counter_##name(struct device *dev, \
+ struct device_attribute *attr, \
+ char *buf) \
+ { \
+ struct ipath_devdata *dd = dev_get_drvdata(dev); \
+ return scnprintf(\
+ buf, PAGE_SIZE, "%llu\n", (unsigned long long) \
+ ipath_snap_cntr( \
+ dd, offsetof(struct infinipath_counters, \
+ attr) / sizeof(u64))); \
+ } \
+ static DEVICE_ATTR(name, S_IRUGO, show_counter_##name, NULL);
+
+DEVICE_COUNTER(ib_link_downeds, IBLinkDownedCnt);
+DEVICE_COUNTER(ib_link_err_recoveries, IBLinkErrRecoveryCnt);
+DEVICE_COUNTER(ib_status_changes, IBStatusChangeCnt);
+DEVICE_COUNTER(ib_symbol_errs, IBSymbolErrCnt);
+DEVICE_COUNTER(lb_flow_stalls, LBFlowStallCnt);
+DEVICE_COUNTER(lb_ints, LBIntCnt);
+DEVICE_COUNTER(rx_bad_formats, RxBadFormatCnt);
+DEVICE_COUNTER(rx_buf_ovfls, RxBufOvflCnt);
+DEVICE_COUNTER(rx_data_pkts, RxDataPktCnt);
+DEVICE_COUNTER(rx_dropped_pkts, RxDroppedPktCnt);
+DEVICE_COUNTER(rx_dwords, RxDwordCnt);
+DEVICE_COUNTER(rx_ebps, RxEBPCnt);
+DEVICE_COUNTER(rx_flow_ctrl_errs, RxFlowCtrlErrCnt);
+DEVICE_COUNTER(rx_flow_pkts, RxFlowPktCnt);
+DEVICE_COUNTER(rx_icrc_errs, RxICRCErrCnt);
+DEVICE_COUNTER(rx_len_errs, RxLenErrCnt);
+DEVICE_COUNTER(rx_link_problems, RxLinkProblemCnt);
+DEVICE_COUNTER(rx_lpcrc_errs, RxLPCRCErrCnt);
+DEVICE_COUNTER(rx_max_min_len_errs, RxMaxMinLenErrCnt);
+DEVICE_COUNTER(rx_p0_hdr_egr_ovfls, RxP0HdrEgrOvflCnt);
+DEVICE_COUNTER(rx_p1_hdr_egr_ovfls, RxP1HdrEgrOvflCnt);
+DEVICE_COUNTER(rx_p2_hdr_egr_ovfls, RxP2HdrEgrOvflCnt);
+DEVICE_COUNTER(rx_p3_hdr_egr_ovfls, RxP3HdrEgrOvflCnt);
+DEVICE_COUNTER(rx_p4_hdr_egr_ovfls, RxP4HdrEgrOvflCnt);
+DEVICE_COUNTER(rx_p5_hdr_egr_ovfls, RxP5HdrEgrOvflCnt);
+DEVICE_COUNTER(rx_p6_hdr_egr_ovfls, RxP6HdrEgrOvflCnt);
+DEVICE_COUNTER(rx_p7_hdr_egr_ovfls, RxP7HdrEgrOvflCnt);
+DEVICE_COUNTER(rx_p8_hdr_egr_ovfls, RxP8HdrEgrOvflCnt);
+DEVICE_COUNTER(rx_pkey_mismatches, RxPKeyMismatchCnt);
+DEVICE_COUNTER(rx_tid_full_errs, RxTIDFullErrCnt);
+DEVICE_COUNTER(rx_tid_valid_errs, RxTIDValidErrCnt);
+DEVICE_COUNTER(rx_vcrc_errs, RxVCRCErrCnt);
+DEVICE_COUNTER(tx_data_pkts, TxDataPktCnt);
+DEVICE_COUNTER(tx_dropped_pkts, TxDroppedPktCnt);
+DEVICE_COUNTER(tx_dwords, TxDwordCnt);
+DEVICE_COUNTER(tx_flow_pkts, TxFlowPktCnt);
+DEVICE_COUNTER(tx_flow_stalls, TxFlowStallCnt);
+DEVICE_COUNTER(tx_len_errs, TxLenErrCnt);
+DEVICE_COUNTER(tx_max_min_len_errs, TxMaxMinLenErrCnt);
+DEVICE_COUNTER(tx_underruns, TxUnderrunCnt);
+DEVICE_COUNTER(tx_unsup_vl_errs, TxUnsupVLErrCnt);
+
+static struct attribute *dev_counter_attributes[] = {
+ &dev_attr_ib_link_downeds.attr,
+ &dev_attr_ib_link_err_recoveries.attr,
+ &dev_attr_ib_status_changes.attr,
+ &dev_attr_ib_symbol_errs.attr,
+ &dev_attr_lb_flow_stalls.attr,
+ &dev_attr_lb_ints.attr,
+ &dev_attr_rx_bad_formats.attr,
+ &dev_attr_rx_buf_ovfls.attr,
+ &dev_attr_rx_data_pkts.attr,
+ &dev_attr_rx_dropped_pkts.attr,
+ &dev_attr_rx_dwords.attr,
+ &dev_attr_rx_ebps.attr,
+ &dev_attr_rx_flow_ctrl_errs.attr,
+ &dev_attr_rx_flow_pkts.attr,
+ &dev_attr_rx_icrc_errs.attr,
+ &dev_attr_rx_len_errs.attr,
+ &dev_attr_rx_link_problems.attr,
+ &dev_attr_rx_lpcrc_errs.attr,
+ &dev_attr_rx_max_min_len_errs.attr,
+ &dev_attr_rx_p0_hdr_egr_ovfls.attr,
+ &dev_attr_rx_p1_hdr_egr_ovfls.attr,
+ &dev_attr_rx_p2_hdr_egr_ovfls.attr,
+ &dev_attr_rx_p3_hdr_egr_ovfls.attr,
+ &dev_attr_rx_p4_hdr_egr_ovfls.attr,
+ &dev_attr_rx_p5_hdr_egr_ovfls.attr,
+ &dev_attr_rx_p6_hdr_egr_ovfls.attr,
+ &dev_attr_rx_p7_hdr_egr_ovfls.attr,
+ &dev_attr_rx_p8_hdr_egr_ovfls.attr,
+ &dev_attr_rx_pkey_mismatches.attr,
+ &dev_attr_rx_tid_full_errs.attr,
+ &dev_attr_rx_tid_valid_errs.attr,
+ &dev_attr_rx_vcrc_errs.attr,
+ &dev_attr_tx_data_pkts.attr,
+ &dev_attr_tx_dropped_pkts.attr,
+ &dev_attr_tx_dwords.attr,
+ &dev_attr_tx_flow_pkts.attr,
+ &dev_attr_tx_flow_stalls.attr,
+ &dev_attr_tx_len_errs.attr,
+ &dev_attr_tx_max_min_len_errs.attr,
+ &dev_attr_tx_underruns.attr,
+ &dev_attr_tx_unsup_vl_errs.attr,
+ NULL
+};
+
+static struct attribute_group dev_counter_attr_group = {
+ .name = "counters",
+ .attrs = dev_counter_attributes
+};
+
+static ssize_t store_reset(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf,
+ size_t count)
+{
+ struct ipath_devdata *dd = dev_get_drvdata(dev);
+ int ret;
+
+ if (count < 5 || memcmp(buf, "reset", 5)) {
+ ret = -EINVAL;
+ goto bail;
+ }
+
+ ret = ipath_reset_device(dd->ipath_unit);
+bail:
+ return ret<0 ? ret : count;
+}
+
+static ssize_t store_link_state(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf,
+ size_t count)
+{
+ struct ipath_devdata *dd = dev_get_drvdata(dev);
+ int ret, r;
+ u16 state;
+
+ ret = ipath_parse_ushort(buf, &state);
+ if (ret < 0)
+ goto invalid;
+
+ r = ipath_layer_set_linkstate(dd, state);
+ if (r < 0) {
+ ret = r;
+ goto bail;
+ }
+
+ goto bail;
+invalid:
+ dev_err(dev, "attempt to set invalid link state\n");
+bail:
+ return ret;
+}
+
+static ssize_t show_flash(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct ipath_devdata *dd = dev_get_drvdata(dev);
+ ssize_t ret;
+
+ if (ipath_eeprom_read(dd, 0, buf, sizeof(struct ipath_flash))) {
+ ret = -ENXIO;
+ dev_err(dev, "failed to read from flash\n");
+ goto bail;
+ }
+
+ ret = sizeof(struct ipath_flash);
+bail:
+ return ret;
+}
+
+static ssize_t store_flash(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf,
+ size_t count)
+{
+ struct ipath_devdata *dd = dev_get_drvdata(dev);
+ ssize_t ret;
+
+ if (count != sizeof(struct ipath_flash)) {
+ ret = -EINVAL;
+ goto bail;
+ }
+
+ if (ipath_eeprom_write(dd, 0, buf, count)) {
+ ret = -ENXIO;
+ dev_err(dev, "failed to write to flash\n");
+ goto bail;
+ }
+
+ ret = count;
+bail:
+ return ret;
+}
+
+static ssize_t show_mtu(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct ipath_devdata *dd = dev_get_drvdata(dev);
+ return scnprintf(buf, PAGE_SIZE, "%u\n", dd->ipath_ibmtu);
+}
+
+static ssize_t store_mtu(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf,
+ size_t count)
+{
+ struct ipath_devdata *dd = dev_get_drvdata(dev);
+ ssize_t ret;
+ u16 mtu = 0;
+ int r;
+
+ ret = ipath_parse_ushort(buf, &mtu);
+ if (ret < 0)
+ goto invalid;
+
+ r = ipath_layer_set_mtu(dd, mtu);
+ if (r < 0)
+ ret = r;
+
+ goto bail;
+invalid:
+ dev_err(dev, "attempt to set invalid MTU\n");
+bail:
+ return ret;
+}
+
+static DRIVER_ATTR(atomic_stats, S_IRUGO, show_atomic_stats, NULL);
+static DRIVER_ATTR(num_units, S_IRUGO, show_num_units, NULL);
+static DRIVER_ATTR(version, S_IRUGO, show_version, NULL);
+
+static struct attribute *driver_attributes[] = {
+ &driver_attr_atomic_stats.attr,
+ &driver_attr_num_units.attr,
+ &driver_attr_version.attr,
+ NULL
+};
+
+static struct attribute_group driver_attr_group = {
+ .attrs = driver_attributes
+};
+
+static DEVICE_ATTR(atomic_counters, S_IRUGO, show_atomic_counters, NULL);
+static DEVICE_ATTR(flash, S_IWUSR | S_IRUGO, show_flash, store_flash);
+static DEVICE_ATTR(guid, S_IWUSR | S_IRUGO, show_guid, store_guid);
+static DEVICE_ATTR(lid, S_IWUSR | S_IRUGO, show_lid, store_lid);
+static DEVICE_ATTR(link_state, S_IWUSR, NULL, store_link_state);
+static DEVICE_ATTR(mlid, S_IWUSR | S_IRUGO, show_mlid, store_mlid);
+static DEVICE_ATTR(mtu, S_IWUSR | S_IRUGO, show_mtu, store_mtu);
+static DEVICE_ATTR(nguid, S_IRUGO, show_nguid, NULL);
+static DEVICE_ATTR(node_info, S_IRUGO, show_node_info, NULL);
+static DEVICE_ATTR(port_info, S_IRUGO, show_port_info, NULL);
+static DEVICE_ATTR(reset, S_IWUSR, NULL, store_reset);
+static DEVICE_ATTR(serial, S_IRUGO, show_serial, NULL);
+static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
+static DEVICE_ATTR(status_str, S_IRUGO, show_status_str, NULL);
+static DEVICE_ATTR(boardversion, S_IRUGO, show_boardversion, NULL);
+static DEVICE_ATTR(unit, S_IRUGO, show_unit, NULL);
+
+static struct attribute *dev_attributes[] = {
+ &dev_attr_atomic_counters.attr,
+ &dev_attr_flash.attr,
+ &dev_attr_guid.attr,
+ &dev_attr_lid.attr,
+ &dev_attr_link_state.attr,
+ &dev_attr_mlid.attr,
+ &dev_attr_mtu.attr,
+ &dev_attr_nguid.attr,
+ &dev_attr_node_info.attr,
+ &dev_attr_port_info.attr,
+ &dev_attr_serial.attr,
+ &dev_attr_status.attr,
+ &dev_attr_status_str.attr,
+ &dev_attr_boardversion.attr,
+ &dev_attr_unit.attr,
+ NULL
+};
+
+static struct attribute_group dev_attr_group = {
+ .attrs = dev_attributes
+};
+
+/**
+ * ipath_expose_reset - create a device reset file
+ * @dev: the device structure
+ *
+ * Only expose a file that lets us reset the device after someone
+ * enters diag mode. A device reset is quite likely to crash the
+ * machine entirely, so we don't want to normally make it
+ * available.
+ */
+int ipath_expose_reset(struct device *dev)
+{
+ return device_create_file(dev, &dev_attr_reset);
+}
+
+int ipath_driver_create_group(struct device_driver *drv)
+{
+ int ret;
+
+ if (!drv->kobj.dentry) {
+ ret = -ENODEV;
+ goto bail;
+ }
+
+ ret = sysfs_create_group(&drv->kobj, &driver_attr_group);
+ if (ret)
+ goto bail;
+
+ ret = sysfs_create_group(&drv->kobj, &driver_stat_attr_group);
+ if (ret)
+ sysfs_remove_group(&drv->kobj, &driver_attr_group);
+
+bail:
+ return ret;
+}
+
+void ipath_driver_remove_group(struct device_driver *drv)
+{
+ if (drv->kobj.dentry) {
+ sysfs_remove_group(&drv->kobj, &driver_stat_attr_group);
+ sysfs_remove_group(&drv->kobj, &driver_attr_group);
+ }
+}
+
+int ipath_device_create_group(struct device *dev, struct ipath_devdata *dd)
+{
+ int ret;
+ char unit[5];
+
+ ret = sysfs_create_group(&dev->kobj, &dev_attr_group);
+ if (ret)
+ goto bail;
+
+ ret = sysfs_create_group(&dev->kobj, &dev_counter_attr_group);
+ if (ret)
+ goto bail;
+
+ snprintf(unit, sizeof(unit), "%02u", (unsigned) dd->ipath_unit);
+ ret = sysfs_create_link(&dev->driver->kobj, &dev->kobj, unit);
+bail:
+ return ret;
+}
+
+void ipath_device_remove_group(struct device *dev, struct ipath_devdata *dd)
+{
+ char unit[5];
+
+ snprintf(unit, sizeof(unit), "%02u", (unsigned) dd->ipath_unit);
+ sysfs_remove_link(&dev->driver->kobj, unit);
+
+ sysfs_remove_group(&dev->kobj, &dev_counter_attr_group);
+ sysfs_remove_group(&dev->kobj, &dev_attr_group);
+
+ device_remove_file(dev, &dev_attr_reset);
+}
^ permalink raw reply [flat|nested] 70+ messages in thread* Re: [PATCH 8 of 20] ipath - sysfs support for core driver
2006-03-10 0:35 ` [PATCH 8 of 20] ipath - sysfs support for core driver Bryan O'Sullivan
@ 2006-03-10 1:11 ` Greg KH
2006-03-10 5:09 ` Bryan O'Sullivan
0 siblings, 1 reply; 70+ messages in thread
From: Greg KH @ 2006-03-10 1:11 UTC (permalink / raw)
To: Bryan O'Sullivan; +Cc: rolandd, akpm, davem, linux-kernel, openib-general
On Thu, Mar 09, 2006 at 04:35:38PM -0800, Bryan O'Sullivan wrote:
> +static ssize_t show_node_info(struct device *dev,
> + struct device_attribute *attr,
> + char *buf)
> +{
> + static const size_t count = 10;
> + struct ipath_devdata *dd = dev_get_drvdata(dev);
> + u32 *nodeinfo;
> + int ret;
> +
> + if (!dd->ipath_statusp) {
> + ret = -EINVAL;
> + goto bail;
> + }
> +
> + nodeinfo = (u32 *) buf;
> +
> + /* so we only initialize non-zero fields. */
> + memset(nodeinfo, 0, count * sizeof(u32));
> +
> + nodeinfo[0] = /* BaseVersion is SMA */
> + /* ClassVersion is SMA */
> + (1 << 8) /* NodeType */
> + |(1 << 0); /* NumPorts */
> + nodeinfo[1] = (u32) (dd->ipath_guid >> 32);
> + nodeinfo[2] = (u32) (dd->ipath_guid & 0xffffffff);
> + /* PortGUID == SystemImageGUID for us */
> + nodeinfo[3] = nodeinfo[1];
> + /* PortGUID == SystemImageGUID for us */
> + nodeinfo[4] = nodeinfo[2];
> + /* PortGUID == NodeGUID for us */
> + nodeinfo[5] = nodeinfo[3];
> + /* PortGUID == NodeGUID for us */
> + nodeinfo[6] = nodeinfo[4];
> + nodeinfo[7] = (4 << 16) /* we support 4 pkeys */
> + |(dd->ipath_deviceid << 0);
> + /* our chip version as 16 bits major, 16 bits minor */
> + nodeinfo[8] = dd->ipath_minrev | (dd->ipath_majrev << 16);
> + nodeinfo[9] = (dd->ipath_unit << 24) | (dd->ipath_vendorid << 0);
> +
> + ret = count * sizeof(u32);
> +bail:
> + return ret;
> +}
> +
> +static ssize_t show_port_info(struct device *dev,
> + struct device_attribute *attr,
> + char *buf)
> +{
> + static const size_t count = 13;
> + int ret;
> + u32 tmp, tmp2;
> + struct ipath_devdata *dd = dev_get_drvdata(dev);
> + u32 *portinfo;
> +
> + if (!dd->ipath_statusp) {
> + ret = -EINVAL;
> + goto bail;
> + }
> +
> + portinfo = (u32 *) buf;
> +
> + /* so we only initialize non-zero fields. */
> + memset(portinfo, 0, count * sizeof portinfo);
> +
> + /*
> + * Notimpl yet M_Key (64)
> + * Notimpl yet GID (64)
> + */
> +
> + portinfo[4] = (dd->ipath_lid << 16);
> +
> + /*
> + * Notimpl yet SMLID (should we store this in the driver, in case
> + * SMA dies?) CapabilityMask is 0, we don't support any of these
> + * DiagCode is 0; we don't store any diag info for now Notimpl yet
> + * M_KeyLeasePeriod (we don't support M_Key)
> + */
> +
> + /* LocalPortNum is whichever port number they ask for */
> + portinfo[7] = (dd->ipath_unit << 24)
> + /* LinkWidthEnabled */
> + | (2 << 16)
> + /* LinkWidthSupported (really 2, but not IB valid) */
> + | (3 << 8)
> + /* LinkWidthActive */
> + | (2 << 0);
> + tmp = dd->ipath_lastibcstat & IPATH_IBSTATE_MASK;
> + tmp2 = 5;
> + if (tmp == IPATH_IBSTATE_INIT)
> + tmp = 2;
> + else if (tmp == IPATH_IBSTATE_ARM)
> + tmp = 3;
> + else if (tmp == IPATH_IBSTATE_ACTIVE)
> + tmp = 4;
> + else {
> + tmp = 0; /* down */
> + tmp2 = tmp & 0xf;
> + }
> +
> + portinfo[8] = (1 << 28) /* LinkSpeedSupported */
> + |(tmp << 24) /* PortState */
> + |(tmp2 << 20) /* PortPhysicalState */
> + |(2 << 16)
> +
> + /* LinkDownDefaultState */
> + /* M_KeyProtectBits == 0 */
> + /* NotImpl yet LMC == 0 (we can support all values) */
> + | (1 << 4) /* LinkSpeedActive */
> + |(1 << 0); /* LinkSpeedEnabled */
> + switch (dd->ipath_ibmtu) {
> + case 4096:
> + tmp = 5;
> + break;
> + case 2048:
> + tmp = 4;
> + break;
> + case 1024:
> + tmp = 3;
> + break;
> + case 512:
> + tmp = 2;
> + break;
> + case 256:
> + tmp = 1;
> + break;
> + default: /* oops, something is wrong */
> + ipath_dbg("Problem, ipath_ibmtu 0x%x not a valid IB MTU, "
> + "treat as 2048\n", dd->ipath_ibmtu);
> + tmp = 4;
> + break;
> + }
> + portinfo[9] = (tmp << 28)
> + /* NeighborMTU */
> + /* Notimpl MasterSMSL */
> + | (1 << 20)
> +
> + /* VLCap */
> + /* Notimpl InitType (actually, an SMA decision) */
> + /* VLHighLimit is 0 (only one VL) */
> + ; /* VLArbitrationHighCap is 0 (only one VL) */
> + portinfo[10] = /* VLArbitrationLowCap is 0 (only one VL) */
> + /* InitTypeReply is SMA decision */
> + (5 << 16) /* MTUCap 4096 */
> + |(7 << 13) /* VLStallCount */
> + |(0x1f << 8) /* HOQLife */
> + |(1 << 4)
> +
> + /* OperationalVLs 0 */
> + /* PartitionEnforcementInbound */
> + /* PartitionEnforcementOutbound not enforced */
> + /* FilterRawinbound not enforced */
> + ; /* FilterRawOutbound not enforced */
> + /* M_KeyViolations are not counted by hardware, SMA can count */
> + tmp = ipath_read_creg32(dd, dd->ipath_cregs->cr_errpkey);
> + /* P_KeyViolations are counted by hardware. */
> + portinfo[11] = ((tmp & 0xffff) << 0);
> + portinfo[12] =
> + /* Q_KeyViolations are not counted by hardware */
> + (1 << 8)
> +
> + /* GUIDCap */
> + /* SubnetTimeOut handled by SMA */
> + /* RespTimeValue handled by SMA */
> + ;
> + /* LocalPhyErrors are programmed to max */
> + portinfo[12] |= (0xf << 20)
> + | (0xf << 16) /* OverRunErrors are programmed to max */
> + ;
> +
> + ret = count * sizeof(u32);
> +bail:
> + return ret;
> +}
These two files sure do show a lot of different stuff, all in a
predefined structure for a single file. Please break them up into the
different individual files please.
thanks,
greg k-h
^ permalink raw reply [flat|nested] 70+ messages in thread* Re: [PATCH 8 of 20] ipath - sysfs support for core driver
2006-03-10 1:11 ` Greg KH
@ 2006-03-10 5:09 ` Bryan O'Sullivan
2006-03-05 3:08 ` Pavel Machek
2006-03-10 6:37 ` Greg KH
0 siblings, 2 replies; 70+ messages in thread
From: Bryan O'Sullivan @ 2006-03-10 5:09 UTC (permalink / raw)
To: Greg KH; +Cc: rolandd, akpm, davem, linux-kernel, openib-general
On Thu, 2006-03-09 at 17:11 -0800, Greg KH wrote:
> These two files sure do show a lot of different stuff, all in a
> predefined structure for a single file. Please break them up into the
> different individual files please.
The problem is that I want them to be presented together. They look
like a pile of different stuff, but they're actually Infiniband NodeInfo
and PortInfo structures. And yes, they are that ugly.
These files fall into the same categories as the atomic_counters and
atomic_snapshots files you raised objections to earlier; it actually
makes sense to look at them as a whole, not their constituent parts.
In the earlier round of review, people suggested that I use netlink for
stuff like this, but I quickly decided I'd rather gnaw my leg off than
use the netlink API.
I'm thinking at this point that I should just route this information
through the /dev/ipath_sma char device, and maybe
add /dev/ipath_counters%d and /dev/ipath_stats to go with it. I think
that's a pretty crummy approach that sysfs solves more cleanly, but
there you go.
<b
^ permalink raw reply [flat|nested] 70+ messages in thread
* Re: [PATCH 8 of 20] ipath - sysfs support for core driver
2006-03-10 5:09 ` Bryan O'Sullivan
@ 2006-03-05 3:08 ` Pavel Machek
2006-03-10 6:37 ` Greg KH
1 sibling, 0 replies; 70+ messages in thread
From: Pavel Machek @ 2006-03-05 3:08 UTC (permalink / raw)
To: Bryan O'Sullivan
Cc: Greg KH, rolandd, akpm, davem, linux-kernel, openib-general
Hi!
> I'm thinking at this point that I should just route this information
> through the /dev/ipath_sma char device, and maybe
> add /dev/ipath_counters%d and /dev/ipath_stats to go with it. I think
> that's a pretty crummy approach that sysfs solves more cleanly, but
> there you go.
Too bad for your leg, I'm afraid :-).
Pavel
--
Thanks, Sharp!
^ permalink raw reply [flat|nested] 70+ messages in thread
* Re: [PATCH 8 of 20] ipath - sysfs support for core driver
2006-03-10 5:09 ` Bryan O'Sullivan
2006-03-05 3:08 ` Pavel Machek
@ 2006-03-10 6:37 ` Greg KH
2006-03-10 14:59 ` Roland Dreier
1 sibling, 1 reply; 70+ messages in thread
From: Greg KH @ 2006-03-10 6:37 UTC (permalink / raw)
To: Bryan O'Sullivan; +Cc: rolandd, akpm, davem, linux-kernel, openib-general
On Thu, Mar 09, 2006 at 09:09:37PM -0800, Bryan O'Sullivan wrote:
> On Thu, 2006-03-09 at 17:11 -0800, Greg KH wrote:
>
> > These two files sure do show a lot of different stuff, all in a
> > predefined structure for a single file. Please break them up into the
> > different individual files please.
>
> The problem is that I want them to be presented together. They look
> like a pile of different stuff, but they're actually Infiniband NodeInfo
> and PortInfo structures. And yes, they are that ugly.
Then why not just have a bunch of different files for the different
things, and then a simple shell script to grab them all and put them
together however you want.
The main issue is that if you create a sysfs file like this, and then in
3 months realize that you need to change one of those characters to
be something else, you are in big trouble...
> These files fall into the same categories as the atomic_counters and
> atomic_snapshots files you raised objections to earlier; it actually
> makes sense to look at them as a whole, not their constituent parts.
Sure, lots of different files can be combined by a script into a whole.
> In the earlier round of review, people suggested that I use netlink for
> stuff like this, but I quickly decided I'd rather gnaw my leg off than
> use the netlink API.
Just because you don't want to use it doesn't mean it isn't the proper
tool...
thanks,
greg k-h
^ permalink raw reply [flat|nested] 70+ messages in thread
* Re: [PATCH 8 of 20] ipath - sysfs support for core driver
2006-03-10 6:37 ` Greg KH
@ 2006-03-10 14:59 ` Roland Dreier
2006-03-10 15:08 ` [openib-general] " Hal Rosenstock
0 siblings, 1 reply; 70+ messages in thread
From: Roland Dreier @ 2006-03-10 14:59 UTC (permalink / raw)
To: Greg KH
Cc: Bryan O'Sullivan, rolandd, akpm, davem, linux-kernel,
openib-general
Greg> The main issue is that if you create a sysfs file like this,
Greg> and then in 3 months realize that you need to change one of
Greg> those characters to be something else, you are in big
Greg> trouble...
I think that PortInfo and NodeInfo might be fair game for sysfs files,
because they are actually defined in the IB spec with a binary format
that is sent on the wire. So they're not going to change.
On the other hand it's not clear to me why using that wire protocol as
an interface to userspace is a good idea...
- R.
^ permalink raw reply [flat|nested] 70+ messages in thread* Re: [openib-general] Re: [PATCH 8 of 20] ipath - sysfs support for core driver
2006-03-10 14:59 ` Roland Dreier
@ 2006-03-10 15:08 ` Hal Rosenstock
2006-03-10 16:54 ` Greg KH
0 siblings, 1 reply; 70+ messages in thread
From: Hal Rosenstock @ 2006-03-10 15:08 UTC (permalink / raw)
To: Roland Dreier; +Cc: Greg KH, Andrew Morton, linux-kernel, openib-general, davem
On Fri, 2006-03-10 at 09:59, Roland Dreier wrote:
> Greg> The main issue is that if you create a sysfs file like this,
> Greg> and then in 3 months realize that you need to change one of
> Greg> those characters to be something else, you are in big
> Greg> trouble...
>
> I think that PortInfo and NodeInfo might be fair game for sysfs files,
> because they are actually defined in the IB spec with a binary format
> that is sent on the wire. So they're not going to change.
Not true; There have been and likely will be more upward compatible
changes (especially to PortInfo).
-- Hal
>
> On the other hand it's not clear to me why using that wire protocol as
> an interface to userspace is a good idea...
>
> - R.
> _______________________________________________
> openib-general mailing list
> openib-general@openib.org
> http://openib.org/mailman/listinfo/openib-general
>
> To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general
^ permalink raw reply [flat|nested] 70+ messages in thread
* Re: [openib-general] Re: [PATCH 8 of 20] ipath - sysfs support for core driver
2006-03-10 15:08 ` [openib-general] " Hal Rosenstock
@ 2006-03-10 16:54 ` Greg KH
2006-03-10 17:05 ` Bryan O'Sullivan
0 siblings, 1 reply; 70+ messages in thread
From: Greg KH @ 2006-03-10 16:54 UTC (permalink / raw)
To: Hal Rosenstock
Cc: Roland Dreier, Andrew Morton, linux-kernel, openib-general, davem
On Fri, Mar 10, 2006 at 10:08:10AM -0500, Hal Rosenstock wrote:
> On Fri, 2006-03-10 at 09:59, Roland Dreier wrote:
> > Greg> The main issue is that if you create a sysfs file like this,
> > Greg> and then in 3 months realize that you need to change one of
> > Greg> those characters to be something else, you are in big
> > Greg> trouble...
> >
> > I think that PortInfo and NodeInfo might be fair game for sysfs files,
> > because they are actually defined in the IB spec with a binary format
> > that is sent on the wire. So they're not going to change.
>
> Not true; There have been and likely will be more upward compatible
> changes (especially to PortInfo).
Great, that means they should NOT be exported to userspace in this
fashion...
> > On the other hand it's not clear to me why using that wire protocol as
> > an interface to userspace is a good idea...
Agreed.
thanks,
greg k-h
^ permalink raw reply [flat|nested] 70+ messages in thread
* Re: [openib-general] Re: [PATCH 8 of 20] ipath - sysfs support for core driver
2006-03-10 16:54 ` Greg KH
@ 2006-03-10 17:05 ` Bryan O'Sullivan
0 siblings, 0 replies; 70+ messages in thread
From: Bryan O'Sullivan @ 2006-03-10 17:05 UTC (permalink / raw)
To: Greg KH
Cc: Hal Rosenstock, Andrew Morton, Roland Dreier, linux-kernel,
openib-general, davem
On Fri, 2006-03-10 at 08:54 -0800, Greg KH wrote:
> Great, that means they should NOT be exported to userspace in this
> fashion...
OK, into debugfs or ipathfs or some other such place they'll go, then.
<b
^ permalink raw reply [flat|nested] 70+ messages in thread
* [PATCH 9 of 20] ipath - char devices for diagnostics and lightweight subnet management
2006-03-10 0:35 [PATCH 0 of 20] [RFC] ipath driver - another round for review Bryan O'Sullivan
` (7 preceding siblings ...)
2006-03-10 0:35 ` [PATCH 8 of 20] ipath - sysfs support for core driver Bryan O'Sullivan
@ 2006-03-10 0:35 ` Bryan O'Sullivan
2006-03-10 0:45 ` Roland Dreier
2006-03-10 0:35 ` [PATCH 10 of 20] ipath - support for userspace apps using core driver Bryan O'Sullivan
` (11 subsequent siblings)
20 siblings, 1 reply; 70+ messages in thread
From: Bryan O'Sullivan @ 2006-03-10 0:35 UTC (permalink / raw)
To: rolandd, gregkh, akpm, davem; +Cc: linux-kernel, openib-general
The ipath_diag.c file permits userspace diagnostic tools to read and
write a chip's registers. It is different in purpose from the mmap
interfaces to the /sys/bus/pci resource files.
The ipath_sma.c file supports a lightweight userspace subnet management
agent (SMA). This is used in deployments (such as HPC clusters) where
a full Infiniband protocol stack is not needed.
Signed-off-by: Bryan O'Sullivan <bos@pathscale.com>
diff -r 1123028ac13a -r 28bb276205de drivers/infiniband/hw/ipath/ipath_diag.c
--- /dev/null Thu Jan 1 00:00:00 1970 +0000
+++ b/drivers/infiniband/hw/ipath/ipath_diag.c Thu Mar 9 16:16:04 2006 -0800
@@ -0,0 +1,377 @@
+/*
+ * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+/*
+ * This file contains support for diagnostic functions. It is accessed by
+ * opening the ipath_diag device, normally minor number 129. Diagnostic use
+ * of the InfiniPath chip may render the chip or board unusable until the
+ * driver is unloaded, or in some cases, until the system is rebooted.
+ *
+ * Accesses to the chip through this interface are not similar to going
+ * through the /sys/bus/pci resource mmap interface.
+ */
+
+#include <linux/pci.h>
+#include <linux/version.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+
+#include "ipath_common.h"
+#include "ipath_kernel.h"
+#include "ips_common.h"
+#include "ipath_layer.h"
+
+__kernel_pid_t ipath_diag_alive; /* PID of diags, if running */
+static int diag_set_link;
+
+static int ipath_diag_open(struct inode *in, struct file *fp);
+static int ipath_diag_release(struct inode *in, struct file *fp);
+static ssize_t ipath_diag_read(struct file *fp, char __user *data,
+ size_t count, loff_t *off);
+static ssize_t ipath_diag_write(struct file *fp, const char __user *data,
+ size_t count, loff_t *off);
+
+static struct file_operations diag_file_ops = {
+ .owner = THIS_MODULE,
+ .write = ipath_diag_write,
+ .read = ipath_diag_read,
+ .open = ipath_diag_open,
+ .release = ipath_diag_release
+};
+
+static struct cdev *diag_cdev;
+static struct class_device *diag_class_dev;
+
+int ipath_diag_init(void)
+{
+ return ipath_cdev_init(IPATH_DIAG_MINOR, "ipath_diag",
+ &diag_file_ops, &diag_cdev, &diag_class_dev);
+}
+
+void ipath_diag_cleanup(void)
+{
+ ipath_cdev_cleanup(&diag_cdev, &diag_class_dev);
+}
+
+/**
+ * ipath_read_umem64 - read a 64-bit quantity from the chip into user space
+ * @dd: the infinipath device
+ * @uaddr: the location to store the data in user memory
+ * @caddr: the source chip address (full pointer, not offset)
+ * @count: number of bytes to copy (multiple of 32 bits)
+ *
+ * This function also localizes all chip memory accesses.
+ * The copy should be written such that we read full cacheline packets
+ * from the chip. This is usually used for a single qword
+ *
+ * NOTE: This assumes the chip address is 64-bit aligned.
+ */
+static int ipath_read_umem64(struct ipath_devdata *dd, void __user *uaddr,
+ const void __iomem *caddr, size_t count)
+{
+ const u64 __iomem *reg_addr = caddr;
+ const u64 __iomem *reg_end = reg_addr + (count / sizeof(u64));
+ int ret;
+
+ /* not very efficient, but it works for now */
+ if (reg_addr < dd->ipath_kregbase ||
+ reg_end > dd->ipath_kregend) {
+ ret = -EINVAL;
+ goto bail;
+ }
+ while (reg_addr < reg_end) {
+ u64 data = readq(reg_addr);
+ if (copy_to_user(uaddr, &data, sizeof(u64))) {
+ ret = -EFAULT;
+ goto bail;
+ }
+ reg_addr++;
+ uaddr++;
+ }
+ ret = 0;
+bail:
+ return ret;
+}
+
+/**
+ * ipath_write_umem64 - write a 64-bit quantity to the chip from user space
+ * @dd: the infinipath device
+ * @caddr: the destination chip address (full pointer, not offset)
+ * @uaddr: the source of the data in user memory
+ * @count: the number of bytes to copy (multiple of 32 bits)
+ *
+ * This is usually used for a single qword
+ * NOTE: This assumes the chip address is 64-bit aligned.
+ */
+
+static int ipath_write_umem64(struct ipath_devdata *dd, void __iomem *caddr,
+ const void __user *uaddr, size_t count)
+{
+ u64 __iomem *reg_addr = caddr;
+ const u64 __iomem *reg_end = reg_addr + (count / sizeof(u64));
+ int ret;
+
+ /* not very efficient, but it works for now */
+ if (reg_addr < dd->ipath_kregbase ||
+ reg_end > dd->ipath_kregend) {
+ ret = -EINVAL;
+ goto bail;
+ }
+ while (reg_addr < reg_end) {
+ u64 data;
+ if (copy_from_user(&data, uaddr, sizeof(data))) {
+ ret = -EFAULT;
+ goto bail;
+ }
+ writeq(data, reg_addr);
+
+ reg_addr++;
+ uaddr++;
+ }
+ ret = 0;
+bail:
+ return ret;
+}
+
+/**
+ * ipath_read_umem32 - read a 32-bit quantity from the chip into user space
+ * @dd: the infinipath device
+ * @uaddr: the location to store the data in user memory
+ * @caddr: the source chip address (full pointer, not offset)
+ * @count: number of bytes to copy
+ *
+ * read 32 bit values, not 64 bit; for memories that only
+ * support 32 bit reads; usually a single dword.
+ */
+static int ipath_read_umem32(struct ipath_devdata *dd, void __user *uaddr,
+ const void __iomem *caddr, size_t count)
+{
+ const u32 __iomem *reg_addr = caddr;
+ const u32 __iomem *reg_end = reg_addr + (count / sizeof(u32));
+ int ret;
+
+ if (reg_addr < (u32 __iomem *) dd->ipath_kregbase ||
+ reg_end > (u32 __iomem *) dd->ipath_kregend) {
+ ret = -EINVAL;
+ goto bail;
+ }
+ /* not very efficient, but it works for now */
+ while (reg_addr < reg_end) {
+ u32 data = readl(reg_addr);
+ if (copy_to_user(uaddr, &data, sizeof(data))) {
+ ret = -EFAULT;
+ goto bail;
+ }
+
+ reg_addr++;
+ uaddr++;
+ }
+ ret = 0;
+bail:
+ return ret;
+}
+
+/**
+ * ipath_write_umem32 - write a 32-bit quantity to the chip from user space
+ * @dd: the infinipath device
+ * @caddr: the destination chip address (full pointer, not offset)
+ * @uaddr: the source of the data in user memory
+ * @count: number of bytes to copy
+ *
+ * write 32 bit values, not 64 bit; for memories that only
+ * support 32 bit write; usually a single dword.
+ */
+
+static int ipath_write_umem32(struct ipath_devdata *dd, void __iomem *caddr,
+ const void __user *uaddr, size_t count)
+{
+ u32 __iomem *reg_addr = caddr;
+ const u32 __iomem *reg_end = reg_addr + (count / sizeof(u32));
+ int ret;
+
+ if (reg_addr < (u32 __iomem *) dd->ipath_kregbase ||
+ reg_end > (u32 __iomem *) dd->ipath_kregend) {
+ ret = -EINVAL;
+ return ret;
+ }
+ while (reg_addr < reg_end) {
+ u32 data;
+ if (copy_from_user(&data, uaddr, sizeof(data))) {
+ ret = -EFAULT;
+ goto bail;
+ }
+ writel(data, reg_addr);
+
+ reg_addr++;
+ uaddr++;
+ }
+ ret = 0;
+bail:
+ return ret;
+}
+
+static int ipath_diag_open(struct inode *in, struct file *fp)
+{
+ int i, ret;
+
+ if (ipath_diag_alive) {
+ ipath_dbg("Diags already running (pid %u), failing\n",
+ ipath_diag_alive);
+ ret = -EBUSY;
+ goto bail;
+ }
+
+ for (i = 0; i < atomic_read(&ipath_max); i++) {
+ struct ipath_devdata *dd = ipath_lookup(i);
+
+ if (!dd || !(dd->ipath_flags & IPATH_PRESENT) ||
+ !dd->ipath_kregbase)
+ continue;
+
+ /*
+ * we need at least one infinipath device to be
+ * present (don't use INITTED, because we want to be
+ * able to open even if device is in freeze mode,
+ * which cleared INITTED). There is s small amount of
+ * risk to this, which is why we also verify kregbase
+ * is set.
+ */
+
+ ipath_diag_alive = current->pid;
+ diag_set_link = 0;
+ ipath_dbg("diag device now open, active as PID %u\n",
+ ipath_diag_alive);
+
+ /* Only expose a way to reset the device if we
+ make it into diag mode. */
+ ipath_expose_reset(&dd->pcidev->dev);
+
+ ret = 0;
+ goto bail;
+ }
+
+ ipath_dbg("No hardware yet found and initted, failing diags\n");
+ ret = -ENODEV;
+
+bail:
+ return ret;
+}
+
+static int ipath_diag_release(struct inode *i, struct file *f)
+{
+ ipath_diag_alive = 0;
+ ipath_dbg("Closing DIAG device\n");
+ return 0;
+}
+
+static ssize_t ipath_diag_read(struct file *fp, char __user *data,
+ size_t count, loff_t *off)
+{
+ int unit = 0; /* XXX this is bogus */
+ struct ipath_devdata *dd;
+ void __iomem *kreg_base;
+ ssize_t ret;
+
+ dd = ipath_lookup(unit);
+ if (!dd) {
+ ret = -ENODEV;
+ goto bail;
+ }
+
+ kreg_base = dd->ipath_kregbase;
+
+ if (count == 0)
+ ret = 0;
+ else if ((count % 4) || (*off % 4))
+ /* address or length is not 32-bit aligned, hence invalid */
+ ret = -EINVAL;
+ else if ((count % 8) || (*off % 8))
+ /* address or length not 64-bit aligned; do 32-bit reads */
+ ret = ipath_read_umem32(dd, data, kreg_base + *off, count);
+ else
+ ret = ipath_read_umem64(dd, data, kreg_base + *off, count);
+
+ if (ret >= 0) {
+ *off += count;
+ ret = count;
+ }
+
+bail:
+ return ret;
+}
+
+static ssize_t ipath_diag_write(struct file *fp, const char __user *data,
+ size_t count, loff_t *off)
+{
+ int unit = 0; /* XXX this is bogus */
+ struct ipath_devdata *dd;
+ void __iomem *kreg_base;
+ ssize_t ret;
+
+ dd = ipath_lookup(unit);
+ if (!dd) {
+ ret = -ENODEV;
+ goto bail;
+ }
+ kreg_base = dd->ipath_kregbase;
+
+ if (count == 0)
+ ret = 0;
+ else if ((count % 4) || (*off % 4))
+ /* address or length is not 32-bit aligned, hence invalid */
+ ret = -EINVAL;
+ else if ((count % 8) || (*off % 8))
+ /* address or length not 64-bit aligned; do 32-bit writes */
+ ret = ipath_write_umem32(dd, kreg_base + *off, data, count);
+ else
+ ret = ipath_write_umem64(dd, kreg_base + *off, data, count);
+
+ if (ret >= 0) {
+ *off += count;
+ ret = count;
+ }
+
+bail:
+ return ret;
+}
+
+void ipath_diag_bringup_link(struct ipath_devdata *dd)
+{
+ if (diag_set_link || (dd->ipath_flags & IPATH_LINKACTIVE))
+ return;
+
+ diag_set_link = 1;
+ ipath_cdbg(VERBOSE, "Trying to set to set link active for "
+ "diag pkt\n");
+ ipath_layer_set_linkstate(dd, IPATH_IB_LINKARM);
+ ipath_layer_set_linkstate(dd, IPATH_IB_LINKACTIVE);
+}
diff -r 1123028ac13a -r 28bb276205de drivers/infiniband/hw/ipath/ipath_sma.c
--- /dev/null Thu Jan 1 00:00:00 1970 +0000
+++ b/drivers/infiniband/hw/ipath/ipath_sma.c Thu Mar 9 16:16:04 2006 -0800
@@ -0,0 +1,385 @@
+/*
+ * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/io.h>
+#include <linux/pci.h>
+#include <linux/cdev.h>
+#include <linux/vmalloc.h>
+#include <asm/uaccess.h>
+
+#include "ipath_kernel.h"
+#include "ips_common.h"
+#include "ipath_layer.h"
+
+/* PID of SMA, if it's running. Atomic because it's accessed without
+ * a lock outside this file. */
+atomic_t ipath_sma_alive;
+DEFINE_SPINLOCK(ipath_sma_lock); /* SMA receive */
+
+/* max SM received packets we'll queue; we keep the most recent packets. */
+
+struct _ipath_sma_rpkt ipath_sma_data[IPATH_NUM_SMA_PKTS];
+
+unsigned ipath_sma_first; /* oldest sma packet index */
+unsigned ipath_sma_next; /* next sma packet index to use */
+
+/*
+ * ipath_sma_data_bufs has one extra, pointed to by ipath_sma_data_spare,
+ * so we can exchange buffers to do copy_to_user, and not hold the lock
+ * across the copy_to_user().
+ */
+
+u8 ipath_sma_data_bufs[IPATH_NUM_SMA_PKTS + 1][IPATH_SMA_MAX_PKTSZ];
+u8 *ipath_sma_data_spare;
+/* sma waits globally on all units */
+wait_queue_head_t ipath_sma_wait;
+wait_queue_head_t ipath_sma_state_wait;
+
+static int ipath_sma_open(struct inode *in, struct file *fp);
+static int ipath_sma_release(struct inode *in, struct file *fp);
+static ssize_t ipath_sma_read(struct file *fp, char __user *data,
+ size_t count, loff_t *off);
+static ssize_t ipath_sma_write(struct file *fp, const char __user *data,
+ size_t count, loff_t *off);
+
+static struct file_operations sma_file_ops = {
+ .owner = THIS_MODULE,
+ .write = ipath_sma_write,
+ .read = ipath_sma_read,
+ .open = ipath_sma_open,
+ .release = ipath_sma_release
+};
+
+static struct cdev *sma_cdev;
+static struct class_device *sma_class_dev;
+
+int ipath_sma_init(void)
+{
+ return ipath_cdev_init(IPATH_SMA_MINOR, "ipath_sma", &sma_file_ops,
+ &sma_cdev, &sma_class_dev);
+}
+
+void ipath_sma_cleanup(void)
+{
+ ipath_cdev_cleanup(&sma_cdev, &sma_class_dev);
+}
+
+static int ipath_sma_open(struct inode *in, struct file *fp)
+{
+ unsigned long flags;
+ __kernel_pid_t pid;
+ int s, ret;
+
+ spin_lock_irqsave(&ipath_sma_lock, flags);
+
+ pid = atomic_read(&ipath_sma_alive);
+ if (pid) {
+ ipath_dbg("SMA already running (pid %u), failing\n", pid);
+ ret = -EBUSY;
+ goto bail;
+ }
+
+ for (s = 0; s < atomic_read(&ipath_max); s++) {
+ struct ipath_devdata *dd = ipath_lookup(s);
+ /* we need at least one infinipath device to be initialized. */
+ if (dd && dd->ipath_flags & IPATH_INITTED) {
+ pid = current->pid;
+ *dd->ipath_statusp |= IPATH_STATUS_SMA;
+ *dd->ipath_statusp &= ~IPATH_STATUS_OIB_SMA;
+ }
+ }
+ if (pid) {
+ ipath_cdbg(SMA, "SMA device now open, SMA active as PID %u\n",
+ pid);
+ atomic_set(&ipath_sma_alive, pid);
+ ret = 0;
+ } else {
+ ret = -ENODEV;
+ ipath_dbg("No hardware yet found and initted, failing\n");
+ }
+bail:
+ spin_unlock_irqrestore(&ipath_sma_lock, flags);
+ return ret;
+}
+
+static int ipath_sma_release(struct inode *in, struct file *fp)
+{
+ unsigned long flags;
+ int s;
+
+ spin_lock_irqsave(&ipath_sma_lock, flags);
+
+ atomic_set(&ipath_sma_alive, 0);
+ ipath_cdbg(SMA, "Closing SMA device\n");
+ for (s = 0; s < atomic_read(&ipath_max); s++) {
+ struct ipath_devdata *dd = ipath_lookup(s);
+
+ if (!dd || !(dd->ipath_flags & IPATH_INITTED))
+ continue;
+ *dd->ipath_statusp &= ~IPATH_STATUS_SMA;
+ if (dd->verbs_layer.l_flags & IPATH_VERBS_KERNEL_SMA)
+ *dd->ipath_statusp |= IPATH_STATUS_OIB_SMA;
+ }
+ spin_unlock_irqrestore(&ipath_sma_lock, flags);
+ return 0;
+}
+
+/**
+ * ipath_sma_read - receive an IB packet with QP 0 or 1
+ * @fp: the SMA device file pointer
+ * @data: ipath_sma_pkt structure saying where to place the SMA data
+ * @count: unused by this code
+ * @off: unused by this code
+ *
+ * This receives from all/any of the active chips, and we currently do not
+ * allow specifying just one (we could, by filling in unit in the library
+ * before the syscall, and checking here).
+ */
+static ssize_t ipath_sma_read(struct file *fp, char __user *data,
+ size_t count, loff_t *off)
+{
+ struct _ipath_sma_rpkt *smpkt;
+ struct ipath_sma_pkt rp;
+ unsigned long flags;
+ ssize_t ret;
+ u32 rp_len;
+ int i, any;
+ u8 *sdata;
+ u32 slen;
+
+ if (copy_from_user(&rp, data, sizeof(rp))) {
+ ret = -EFAULT;
+ goto bail;
+ }
+
+ if (!ipath_sma_data_spare) {
+ ipath_dbg("can't do receive, sma not initialized\n");
+ ret = -ENETDOWN;
+ goto bail;
+ }
+
+ for (any = i = 0; i < atomic_read(&ipath_max); i++) {
+ struct ipath_devdata *dd = ipath_lookup(i);
+ if (dd && (dd->ipath_flags & IPATH_INITTED))
+ any++;
+ }
+
+ if (!any) { /* no hardware, freeze, etc. */
+ ipath_cdbg(SMA, "Didn't find any initialized and usable chips\n");
+ ret = -ENODEV;
+ goto bail;
+ }
+
+ wait_event_interruptible(ipath_sma_wait,
+ ipath_sma_data[ipath_sma_first].len);
+
+ spin_lock_irqsave(&ipath_sma_lock, flags);
+ if (ipath_sma_data[ipath_sma_first].len == 0) {
+ /* usually means SMA process received a signal */
+ spin_unlock_irqrestore(&ipath_sma_lock, flags);
+ ret = -EAGAIN;
+ goto bail;
+ }
+
+ smpkt = &ipath_sma_data[ipath_sma_first];
+
+ /*
+ * we swap out the buffer we are going to use with the spare buffer
+ * and set spare to that buffer. This code is the only code that
+ * ever manipulates spare, other than the initialization code.
+ * This code should never be entered by more than one process at
+ * a time, and if it is, the user code doing so deserves what it gets;
+ * it won't break anything in the driver by doing so. We do it this
+ * way to avoid holding a lock across the copy_to_user, which could
+ * fault, or delay a long time while paging occurs; ditto for printks
+ */
+
+ rp_len = rp.len;
+ rp.len = smpkt->len;
+ rp.unit = smpkt->unit;
+
+ slen = smpkt->len;
+ sdata = smpkt->buf;
+ smpkt->buf = ipath_sma_data_spare;
+ ipath_sma_data_spare = sdata;
+ smpkt->len = 0; /* it's available again */
+ if (++ipath_sma_first >= IPATH_NUM_SMA_PKTS)
+ ipath_sma_first = 0;
+ spin_unlock_irqrestore(&ipath_sma_lock, flags);
+
+ if (copy_to_user((void __user *) (unsigned long) rp.data,
+ sdata, min(rp_len, slen))) {
+ ret = -EFAULT;
+ goto bail;
+ }
+
+ if (copy_to_user(data, &rp, sizeof(rp))) {
+ ret = -EFAULT;
+ goto bail;
+ }
+
+ ret = sizeof(rp);
+bail:
+ return ret;
+}
+
+/**
+ * ipath_sma_write - receive an IB packet with QP 0 or 1
+ * @fp: the SMA device file pointer
+ * @data: ipath_sma_pkt structure saying where to get the SMA packet
+ * @count: size of data to write
+ * @off: unused by this code
+ *
+ * This routine is no longer on any critical paths; it is used only
+ * for sending SMA packets, and some diagnostic usage.
+ * Because it's currently sma only, there are no checks to see if the
+ * link is up; sma must be able to send in the not fully initialized state
+ */
+static ssize_t ipath_sma_write(struct file *fp, const char __user *data,
+ size_t count, loff_t *off)
+{
+ u32 __iomem *piobuf;
+ u32 plen, clen, pbufn;
+ struct ipath_sma_pkt sp;
+ u32 *tmpbuf = NULL;
+ struct ipath_devdata *dd;
+ ssize_t ret = 0;
+ u64 val;
+
+ if (count < sizeof(sp)) {
+ ret = -EINVAL;
+ goto bail;
+ }
+
+ if (copy_from_user(&sp, data, sizeof(sp))) {
+ ret = -EFAULT;
+ goto bail;
+ }
+
+ // send count must be an exact number of dwords
+ if (sp.len & 3) {
+ ret = -EINVAL;
+ goto bail;
+ }
+
+ clen = sp.len >> 2;
+
+ dd = ipath_lookup(sp.unit);
+ if (!dd || !(dd->ipath_flags & IPATH_PRESENT) || !dd->ipath_kregbase) {
+ ipath_cdbg(SMA, "illegal unit %u for sma send\n", sp.unit);
+ ret = -ENODEV;
+ goto bail;
+ }
+
+ if (ipath_diag_alive)
+ ipath_diag_bringup_link(dd);
+
+ if (!(dd->ipath_flags & IPATH_INITTED)) {
+ /* no hardware, freeze, etc. */
+ ipath_cdbg(SMA, "unit %u not usable\n", dd->ipath_unit);
+ ret = -ENODEV;
+ goto bail;
+ }
+ val = dd->ipath_lastibcstat & IPATH_IBSTATE_MASK;
+ if (val != IPATH_IBSTATE_INIT && val != IPATH_IBSTATE_ARM &&
+ val != IPATH_IBSTATE_ACTIVE) {
+ ipath_cdbg(SMA, "unit %u not ready (state %llx)\n",
+ dd->ipath_unit, (unsigned long long) val);
+ ret = -EINVAL;
+ goto bail;
+ }
+
+ /* need total length before first word written */
+ plen = sizeof(u32) + sp.len; /* +1 word is for the qword padding */
+
+ if ((plen + 4) > dd->ipath_ibmaxlen) {
+ ipath_dbg("Pkt len 0x%x > ibmaxlen %x\n",
+ plen - 4, dd->ipath_ibmaxlen);
+ ret = -EINVAL;
+ goto bail; /* before writing pbc */
+ }
+ tmpbuf = vmalloc(plen);
+ if (!tmpbuf) {
+ dev_info(&dd->pcidev->dev, "Unable to allocate tmp buffer, "
+ "failing\n");
+ ret = -ENOMEM;
+ goto bail;
+ }
+
+ if (copy_from_user(tmpbuf,
+ (const void __user *) (unsigned long) sp.data,
+ sp.len)) {
+ ret = -EFAULT;
+ goto bail;
+ }
+
+ piobuf = ipath_getpiobuf(dd, &pbufn);
+ if (!piobuf) {
+ ipath_cdbg(SMA, "No PIO buffers available unit %u %u times\n",
+ dd->ipath_unit, dd->ipath_nosma_bufs);
+ dd->ipath_nosma_bufs++;
+ ret = -EBUSY;
+ goto bail;
+ }
+ if (dd->ipath_nosma_bufs) {
+ ipath_cdbg(SMA, "Unit %u got SMA send buffer after %u failures, %u seconds\n",
+ dd->ipath_unit, dd->ipath_nosma_bufs,
+ dd->ipath_nosma_secs);
+ dd->ipath_nosma_bufs = 0;
+ dd->ipath_nosma_secs = 0;
+ }
+
+ plen >>= 2; /* in dwords */
+
+ if (ipath_debug & __IPATH_PKTDBG) // SMA and PKT, both
+ ipath_cdbg(SMA, "unit %u 0x%x+1w pio%d\n",
+ dd->ipath_unit, plen - 1, pbufn);
+
+ /* we have to flush after the PBC for correctness on some cpus
+ * or WC buffer can be written out of order */
+ writeq(plen, piobuf);
+ ipath_flush_wc();
+ /* copy all by the trigger word, then flush, so it's written
+ * to chip before trigger word, then write trigger word, then
+ * flush again, so packet is sent. */
+ __iowrite32_copy(piobuf + 2, tmpbuf, clen - 1);
+ ipath_flush_wc();
+ __raw_writel(tmpbuf[clen - 1], piobuf + clen + 1);
+ ipath_flush_wc();
+ ipath_stats.sps_sma_spkts++;
+
+ ret = sizeof(sp);
+
+bail:
+ vfree(tmpbuf);
+ return ret;
+}
^ permalink raw reply [flat|nested] 70+ messages in thread* Re: [PATCH 9 of 20] ipath - char devices for diagnostics and lightweight subnet management
2006-03-10 0:35 ` [PATCH 9 of 20] ipath - char devices for diagnostics and lightweight subnet management Bryan O'Sullivan
@ 2006-03-10 0:45 ` Roland Dreier
2006-03-10 0:47 ` Bryan O'Sullivan
0 siblings, 1 reply; 70+ messages in thread
From: Roland Dreier @ 2006-03-10 0:45 UTC (permalink / raw)
To: Bryan O'Sullivan
Cc: rolandd, gregkh, akpm, davem, linux-kernel, openib-general
OK, now I can see the change you made:
> +atomic_t ipath_sma_alive;
> +DEFINE_SPINLOCK(ipath_sma_lock); /* SMA receive */
So why is ipath_sma_alive an atomic_t (and why isn't it static)?
You never modify ipath_sma_alive outside of your spinlock, so I don't
see what having it be atomic buys you.
- R.
^ permalink raw reply [flat|nested] 70+ messages in thread
* Re: [PATCH 9 of 20] ipath - char devices for diagnostics and lightweight subnet management
2006-03-10 0:45 ` Roland Dreier
@ 2006-03-10 0:47 ` Bryan O'Sullivan
2006-03-10 0:52 ` Roland Dreier
0 siblings, 1 reply; 70+ messages in thread
From: Bryan O'Sullivan @ 2006-03-10 0:47 UTC (permalink / raw)
To: Roland Dreier; +Cc: rolandd, gregkh, akpm, davem, linux-kernel, openib-general
On Thu, 2006-03-09 at 16:45 -0800, Roland Dreier wrote:
> So why is ipath_sma_alive an atomic_t (and why isn't it static)?
> You never modify ipath_sma_alive outside of your spinlock, so I don't
> see what having it be atomic buys you.
It's read outside of this file, without a lock held.
<b
^ permalink raw reply [flat|nested] 70+ messages in thread
* Re: [PATCH 9 of 20] ipath - char devices for diagnostics and lightweight subnet management
2006-03-10 0:47 ` Bryan O'Sullivan
@ 2006-03-10 0:52 ` Roland Dreier
0 siblings, 0 replies; 70+ messages in thread
From: Roland Dreier @ 2006-03-10 0:52 UTC (permalink / raw)
To: Bryan O'Sullivan
Cc: rolandd, gregkh, akpm, davem, linux-kernel, openib-general
Bryan> It's read outside of this file, without a lock held.
I missed the other reference in another patch. But the central point
still stands: if all you do is atomic_set() and atomic_read(), then
using atomic_t doesn't buy you anything. Just look at what
atomic_read() expands to -- using it isn't protecting you against
anything, so either you have a race, or you were safe without
atomic_t. The only point to atomic_t is so that you can safely do
read-modify-write things like atomic_inc().
- R.
^ permalink raw reply [flat|nested] 70+ messages in thread
* [PATCH 10 of 20] ipath - support for userspace apps using core driver
2006-03-10 0:35 [PATCH 0 of 20] [RFC] ipath driver - another round for review Bryan O'Sullivan
` (8 preceding siblings ...)
2006-03-10 0:35 ` [PATCH 9 of 20] ipath - char devices for diagnostics and lightweight subnet management Bryan O'Sullivan
@ 2006-03-10 0:35 ` Bryan O'Sullivan
2006-03-10 0:35 ` [PATCH 11 of 20] ipath - layering interfaces used by higher-level driver code Bryan O'Sullivan
` (10 subsequent siblings)
20 siblings, 0 replies; 70+ messages in thread
From: Bryan O'Sullivan @ 2006-03-10 0:35 UTC (permalink / raw)
To: rolandd, gregkh, akpm, davem; +Cc: linux-kernel, openib-general
These files introduce a char device that userspace apps use to gain
direct access to the InfiniPath hardware, and routines for pinning and
unpinning user memory.
Signed-off-by: Bryan O'Sullivan <bos@pathscale.com>
diff -r 28bb276205de -r d1da4154aae1 drivers/infiniband/hw/ipath/ipath_file_ops.c
--- /dev/null Thu Jan 1 00:00:00 1970 +0000
+++ b/drivers/infiniband/hw/ipath/ipath_file_ops.c Thu Mar 9 16:16:10 2006 -0800
@@ -0,0 +1,1882 @@
+/*
+ * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/pci.h>
+#include <linux/netdevice.h>
+#include <linux/vmalloc.h>
+#include <linux/cdev.h>
+#include <asm/pgtable.h>
+
+#include "ipath_kernel.h"
+#include "ips_common.h"
+#include "ipath_layer.h"
+
+static int ipath_open(struct inode *, struct file *);
+static int ipath_close(struct inode *, struct file *);
+static ssize_t ipath_write(struct file *, const char __user *, size_t,
+ loff_t *);
+static unsigned int ipath_poll(struct file *, struct poll_table_struct *);
+static int ipath_mmap(struct file *, struct vm_area_struct *);
+
+static struct file_operations ipath_file_ops = {
+ .owner = THIS_MODULE,
+ .write = ipath_write,
+ .open = ipath_open,
+ .release = ipath_close,
+ .poll = ipath_poll,
+ .mmap = ipath_mmap
+};
+
+static int ipath_get_base_info(struct ipath_portdata *pd,
+ void __user *ubase, size_t ubase_size)
+{
+ int ret = 0;
+ struct ipath_base_info *kinfo = NULL;
+ struct ipath_devdata *dd = pd->port_dd;
+
+ if (ubase_size < sizeof(*kinfo)) {
+ ipath_cdbg(PROC,
+ "Base size %lu, need %lu (version mismatch?)\n",
+ (unsigned long) ubase_size,
+ (unsigned long) sizeof(*kinfo));
+ ret = -EINVAL;
+ goto bail;
+ }
+
+ kinfo = kzalloc(sizeof(*kinfo), GFP_KERNEL);
+ if (kinfo == NULL) {
+ ret = -ENOMEM;
+ goto bail;
+ }
+
+ ret = dd->ipath_f_get_base_info(pd, kinfo);
+ if (ret < 0)
+ goto bail;
+
+ kinfo->spi_rcvhdr_cnt = dd->ipath_rcvhdrcnt;
+ kinfo->spi_rcvhdrent_size = dd->ipath_rcvhdrentsize;
+ kinfo->spi_tidegrcnt = dd->ipath_rcvegrcnt;
+ kinfo->spi_rcv_egrbufsize = dd->ipath_rcvegrbufsize;
+ /*
+ * have to mmap whole thing
+ */
+ kinfo->spi_rcv_egrbuftotlen =
+ pd->port_rcvegrbuf_chunks * pd->port_rcvegrbuf_size;
+ kinfo->spi_rcv_egrperchunk = pd->port_rcvegrbufs_perchunk;
+ kinfo->spi_rcv_egrchunksize = kinfo->spi_rcv_egrbuftotlen /
+ pd->port_rcvegrbuf_chunks;
+ kinfo->spi_tidcnt = dd->ipath_rcvtidcnt;
+ /*
+ * for this use, may be ipath_cfgports summed over all chips that
+ * are are configured and present
+ */
+ kinfo->spi_nports = dd->ipath_cfgports;
+ /* unit (chip/board) our port is on */
+ kinfo->spi_unit = dd->ipath_unit;
+ /* for now, only a single page */
+ kinfo->spi_tid_maxsize = PAGE_SIZE;
+
+ /*
+ * Doing this per port, and based on the skip value, etc. This has
+ * to be the actual buffer size, since the protocol code treats it
+ * as an array.
+ *
+ * These have to be set to user addresses in the user code via mmap.
+ * These values are used on return to user code for the mmap target
+ * addresses only. For 32 bit, same 44 bit address problem, so use
+ * the physical address, not virtual. Before 2.6.11, using the
+ * page_address() macro worked, but in 2.6.11, even that returns the
+ * full 64 bit address (upper bits all 1's). So far, using the
+ * physical addresses (or chip offsets, for chip mapping) works, but
+ * no doubt some future kernel release will chang that, and we'll be
+ * on to yet another method of dealing with this
+ */
+ kinfo->spi_rcvhdr_base = (u64) pd->port_rcvhdrq_phys;
+ kinfo->spi_rcv_egrbufs = (u64) pd->port_rcvegr_phys;
+ kinfo->spi_pioavailaddr = (u64) dd->ipath_pioavailregs_phys;
+ kinfo->spi_status = (u64) kinfo->spi_pioavailaddr +
+ (void *) dd->ipath_statusp -
+ (void *) dd->ipath_pioavailregs_dma;
+ kinfo->spi_piobufbase = (u64) pd->port_piobufs;
+ kinfo->__spi_uregbase =
+ dd->ipath_uregbase + dd->ipath_palign * pd->port_port;
+
+ kinfo->spi_pioindex = dd->ipath_pbufsport * (pd->port_port - 1);
+ kinfo->spi_piocnt = dd->ipath_pbufsport;
+ kinfo->spi_pioalign = dd->ipath_palign;
+
+ kinfo->spi_qpair = IPATH_KD_QP;
+ kinfo->spi_piosize = dd->ipath_ibmaxlen;
+ kinfo->spi_mtu = dd->ipath_ibmaxlen; /* maxlen, not ibmtu */
+ kinfo->spi_port = pd->port_port;
+ kinfo->spi_sw_version = IPATH_USER_SWVERSION;
+ kinfo->spi_hw_version = dd->ipath_revision;
+
+ if (copy_to_user(ubase, kinfo, sizeof(*kinfo)))
+ ret = -EFAULT;
+
+bail:
+ kfree(kinfo);
+ return ret;
+}
+
+/**
+ * ipath_tid_update - update a port TID
+ * @pd: the port
+ * @ti: the TID information
+ *
+ * The new implementation as of Oct 2004 is that the driver assigns
+ * the tid and returns it to the caller. To make it easier to
+ * catch bugs, and to reduce search time, we keep a cursor for
+ * each port, walking the shadow tid array to find one that's not
+ * in use.
+ *
+ * For now, if we can't allocate the full list, we fail, although
+ * in the long run, we'll allocate as many as we can, and the
+ * caller will deal with that by trying the remaining pages later.
+ * That means that when we fail, we have to mark the tids as not in
+ * use again, in our shadow copy.
+ *
+ * It's up to the caller to free the tids when they are done.
+ * We'll unlock the pages as they free them.
+ *
+ * Also, right now we are locking one page at a time, but since
+ * the intended use of this routine is for a single group of
+ * virtually contiguous pages, that should change to improve
+ * performance.
+ */
+static int ipath_tid_update(struct ipath_portdata *pd,
+ const struct ipath_tid_info *ti)
+{
+ int ret = 0, ntids;
+ u32 tid, porttid, cnt, i, tidcnt;
+ u16 *tidlist;
+ struct ipath_devdata *dd = pd->port_dd;
+ u64 physaddr;
+ unsigned long vaddr;
+ u64 __iomem *tidbase;
+ unsigned long tidmap[8];
+ struct page **pagep = NULL;
+
+ if (!dd->ipath_pageshadow) {
+ ret = -ENOMEM;
+ goto done;
+ }
+
+ cnt = ti->tidcnt;
+ if (!cnt) {
+ ipath_dbg("After copyin, tidcnt 0, tidlist %llx\n",
+ (unsigned long long) ti->tidlist);
+ /*
+ * Should we treat as success? likely a bug
+ */
+ ret = -EFAULT;
+ goto done;
+ }
+ tidcnt = dd->ipath_rcvtidcnt;
+ if (cnt >= tidcnt) {
+ /* make sure it all fits in port_tid_pg_list */
+ dev_info(&dd->pcidev->dev, "Process tried to allocate %u "
+ "TIDs, only trying max (%u)\n", cnt, tidcnt);
+ cnt = tidcnt;
+ }
+ pagep = (struct page **)pd->port_tid_pg_list;
+ tidlist = (u16 *) (&pagep[cnt]);
+
+ memset(tidmap, 0, sizeof(tidmap));
+ tid = pd->port_tidcursor;
+ /* before decrement; chip actual # */
+ porttid = pd->port_port * tidcnt;
+ ntids = tidcnt;
+ tidbase = (u64 __iomem *) (((char __iomem *) dd->ipath_kregbase) +
+ dd->ipath_rcvtidbase +
+ porttid * sizeof(*tidbase));
+
+ ipath_cdbg(VERBOSE, "Port%u %u tids, cursor %u, tidbase %p\n",
+ pd->port_port, cnt, tid, tidbase);
+
+ /* virtual address of first page in transfer */
+ vaddr = ti->tidvaddr;
+ if (!access_ok(VERIFY_WRITE, (void __user *) vaddr,
+ cnt * PAGE_SIZE)) {
+ ipath_dbg("Fail vaddr %p, %u pages, !access_ok\n",
+ (void *)vaddr, cnt);
+ ret = -EFAULT;
+ goto done;
+ }
+ ret = ipath_get_user_pages(vaddr, cnt, pagep);
+ if (ret) {
+ if (ret == -EBUSY) {
+ ipath_dbg("Failed to lock addr %p, %u pages "
+ "(already locked)\n",
+ (void *) vaddr, cnt);
+ /*
+ * for now, continue, and see what happens but with
+ * the new implementation, this should never happen,
+ * unless perhaps the user has mpin'ed the pages
+ * themselves (something we need to test)
+ */
+ ret = 0;
+ } else {
+ dev_info(&dd->pcidev->dev,
+ "Failed to lock addr %p, %u pages: "
+ "errno %d\n", (void *) vaddr, cnt, -ret);
+ goto done;
+ }
+ }
+ for (i = 0; i < cnt; i++, vaddr += PAGE_SIZE) {
+ for (; ntids--; tid++) {
+ if (tid == tidcnt)
+ tid = 0;
+ if (!dd->ipath_pageshadow[porttid + tid])
+ break;
+ }
+ if (ntids < 0) {
+ /*
+ * oops, wrapped all the way through their TIDs,
+ * and didn't have enough free; see comments at
+ * start of routine
+ */
+ ipath_dbg("Not enough free TIDs for %u pages "
+ "(index %d), failing\n", cnt, i);
+ i--; /* last tidlist[i] not filled in */
+ ret = -ENOMEM;
+ break;
+ }
+ tidlist[i] = tid;
+ ipath_cdbg(VERBOSE, "Updating idx %u to TID %u, "
+ "vaddr %lx\n", i, tid, vaddr);
+ /* we "know" system pages and TID pages are same size */
+ dd->ipath_pageshadow[porttid + tid] = pagep[i];
+ /*
+ * don't need atomic or it's overhead
+ */
+ __set_bit(tid, tidmap);
+ physaddr = page_to_phys(pagep[i]);
+ ipath_stats.sps_pagelocks++;
+ ipath_cdbg(VERBOSE, "TID %u, vaddr %lx, physaddr %llx pgp %p\n",
+ tid, vaddr, (unsigned long long) physaddr,
+ pagep[i]);
+ dd->ipath_f_put_tid(dd, &tidbase[tid], 1, physaddr);
+ /*
+ * don't check this tid in ipath_portshadow, since we
+ * just filled it in; start with the next one.
+ */
+ tid++;
+ }
+
+ if (ret) {
+ u32 limit;
+ cleanup:
+ /* jump here if copy out of updated info failed... */
+ ipath_dbg("After failure (ret=%d), undo %d of %d entries\n",
+ -ret, i, cnt);
+ /* same code that's in ipath_free_tid() */
+ limit = sizeof(tidmap) * BITS_PER_BYTE;
+ if (limit > tidcnt)
+ /* just in case size changes in future */
+ limit = tidcnt;
+ tid = find_first_bit((const unsigned long *)tidmap, limit);
+ for (; tid < limit; tid++) {
+ if (!test_bit(tid, tidmap))
+ continue;
+ if (dd->ipath_pageshadow[porttid + tid]) {
+ ipath_cdbg(VERBOSE, "Freeing TID %u\n",
+ tid);
+ dd->ipath_f_put_tid(dd, &tidbase[tid], 1, dd->ipath_tidinvalid);
+ dd->ipath_pageshadow[porttid + tid] = NULL;
+ ipath_stats.sps_pageunlocks++;
+ }
+ }
+ ipath_release_user_pages(pagep, cnt);
+ } else {
+ /*
+ * Copy the updated array, with ipath_tid's filled in, back
+ * to user. Since we did the copy in already, this "should
+ * never fail" If it does, we have to clean up...
+ */
+ if (copy_to_user((void __user *)
+ (unsigned long) ti->tidlist,
+ tidlist, cnt * sizeof(*tidlist))) {
+ ret = -EFAULT;
+ goto cleanup;
+ }
+ if (copy_to_user((void __user *) (unsigned long) ti->tidmap,
+ tidmap, sizeof tidmap)) {
+ ret = -EFAULT;
+ goto cleanup;
+ }
+ if (tid == tidcnt)
+ tid = 0;
+ pd->port_tidcursor = tid;
+ }
+
+done:
+ if (ret)
+ ipath_dbg("Failed to map %u TID pages, failing with %d\n",
+ ti->tidcnt, -ret);
+ return ret;
+}
+
+/**
+ * ipath_tid_free - free a port TID
+ * @pd: the port
+ * @ti: the TID info
+ *
+ * right now we are unlocking one page at a time, but since
+ * the intended use of this routine is for a single group of
+ * virtually contiguous pages, that should change to improve
+ * performance. We check that the TID is in range for this port
+ * but otherwise don't check validity; if user has an error and
+ * frees the wrong tid, it's only their own data that can thereby
+ * be corrupted. We do check that the TID was in use, for sanity
+ * We always use our idea of the saved address, not the address that
+ * they pass in to us.
+ */
+
+static int ipath_tid_free(struct ipath_portdata *pd,
+ const struct ipath_tid_info *ti)
+{
+ int ret = 0;
+ u32 tid, porttid, cnt, limit, tidcnt;
+ struct ipath_devdata *dd = pd->port_dd;
+ u64 __iomem *tidbase;
+ unsigned long tidmap[8];
+
+ if (!dd->ipath_pageshadow) {
+ ret = -ENOMEM;
+ goto done;
+ }
+
+ if (copy_from_user(tidmap, (void __user *)(unsigned long)ti->tidmap,
+ sizeof tidmap)) {
+ ret = -EFAULT;
+ goto done;
+ }
+
+ porttid = pd->port_port * dd->ipath_rcvtidcnt;
+ tidbase = (u64 __iomem *) ((char __iomem *)(dd->ipath_kregbase) +
+ dd->ipath_rcvtidbase +
+ porttid * sizeof(*tidbase));
+
+ tidcnt = dd->ipath_rcvtidcnt;
+ limit = sizeof(tidmap) * BITS_PER_BYTE;
+ if (limit > tidcnt)
+ /* just in case size changes in future */
+ limit = tidcnt;
+ tid = find_first_bit(tidmap, limit);
+ ipath_cdbg(VERBOSE, "Port%u free %u tids; first bit (max=%d) "
+ "set is %d, porttid %u\n", pd->port_port, ti->tidcnt,
+ limit, tid, porttid);
+ for (cnt = 0; tid < limit; tid++) {
+ /*
+ * small optimization; if we detect a run of 3 or so without
+ * any set, use find_first_bit again. That's mainly to
+ * accelerate the case where we wrapped, so we have some at
+ * the beginning, and some at the end, and a big gap
+ * in the middle.
+ */
+ if (!test_bit(tid, tidmap))
+ continue;
+ cnt++;
+ if (dd->ipath_pageshadow[porttid + tid]) {
+ ipath_cdbg(VERBOSE, "PID %u freeing TID %u\n",
+ pd->port_pid, tid);
+ dd->ipath_f_put_tid(dd, &tidbase[tid], 1,
+ dd->ipath_tidinvalid);
+ ipath_release_user_pages(
+ &dd->ipath_pageshadow[porttid + tid], 1);
+ dd->ipath_pageshadow[porttid + tid] = NULL;
+ ipath_stats.sps_pageunlocks++;
+ } else
+ ipath_dbg("Unused tid %u, ignoring\n", tid);
+ }
+ if (cnt != ti->tidcnt)
+ ipath_dbg("passed in tidcnt %d, only %d bits set in map\n",
+ ti->tidcnt, cnt);
+done:
+ if (ret)
+ ipath_dbg("Failed to unmap %u TID pages, failing with %d\n",
+ ti->tidcnt, -ret);
+ return ret;
+}
+
+/**
+ * ipath_set_part_key - set a partition key
+ * @pd: the port
+ * @key: the key
+ *
+ * We can have up to 4 active at a time (other than the default, which is
+ * always allowed). This is somewhat tricky, since multiple ports may set
+ * the same key, so we reference count them, and clean up at exit. All 4
+ * partition keys are packed into a single infinipath register. It's an
+ * error for a process to set the same pkey multiple times. We provide no
+ * mechanism to de-allocate a pkey at this time, we may eventually need to
+ * do that. I've used the atomic operations, and no locking, and only make
+ * a single pass through what's available. This should be more than
+ * adequate for some time. I'll think about spinlocks or the like if and as
+ * it's necessary.
+ */
+static int ipath_set_part_key(struct ipath_portdata *pd, u16 key)
+{
+ struct ipath_devdata *dd = pd->port_dd;
+ int i, any = 0, pidx = -1;
+ u16 lkey = key & 0x7FFF;
+
+ if (lkey == (IPS_DEFAULT_P_KEY & 0x7FFF)) {
+ /* nothing to do; this key always valid */
+ return 0;
+ }
+
+ ipath_cdbg(VERBOSE, "p%u try to set pkey %hx, current keys "
+ "%hx:%x %hx:%x %hx:%x %hx:%x\n",
+ pd->port_port, key, dd->ipath_pkeys[0],
+ atomic_read(&dd->ipath_pkeyrefs[0]), dd->ipath_pkeys[1],
+ atomic_read(&dd->ipath_pkeyrefs[1]), dd->ipath_pkeys[2],
+ atomic_read(&dd->ipath_pkeyrefs[2]), dd->ipath_pkeys[3],
+ atomic_read(&dd->ipath_pkeyrefs[3]));
+
+ if (!lkey) {
+ ipath_cdbg(PROC, "p%u tries to set key 0, not allowed\n",
+ pd->port_port);
+ return -EINVAL;
+ }
+
+ /*
+ * Set the full membership bit, because it has to be
+ * set in the register or the packet, and it seems
+ * cleaner to set in the register than to force all
+ * callers to set it. (see bug 4331)
+ */
+ key |= 0x8000;
+
+ for (i = 0; i < ARRAY_SIZE(pd->port_pkeys); i++) {
+ if (!pd->port_pkeys[i] && pidx == -1)
+ pidx = i;
+ if (pd->port_pkeys[i] == key) {
+ ipath_cdbg(VERBOSE, "p%u tries to set same pkey "
+ "(%x) more than once\n",
+ pd->port_port, key);
+ return -EEXIST;
+ }
+ }
+ if (pidx == -1) {
+ ipath_dbg("All pkeys for port %u already in use, "
+ "can't set %x\n", pd->port_port, key);
+ return -EBUSY;
+ }
+ for (any = i = 0; i < ARRAY_SIZE(dd->ipath_pkeys); i++) {
+ if (!dd->ipath_pkeys[i]) {
+ any++;
+ continue;
+ }
+ if (dd->ipath_pkeys[i] == key) {
+ atomic_t *pkrefs = &dd->ipath_pkeyrefs[i];
+
+ if (atomic_inc_return(pkrefs) > 1) {
+ pd->port_pkeys[pidx] = key;
+ ipath_cdbg(VERBOSE, "p%u set key %x "
+ "matches #%d, count now %d\n",
+ pd->port_port, key, i,
+ atomic_read(pkrefs));
+ return 0;
+ } else {
+ /*
+ * lost race, decrement count, catch below
+ */
+ atomic_dec(pkrefs);
+ ipath_cdbg(VERBOSE, "Lost race, count was "
+ "0, after dec, it's %d\n",
+ atomic_read(pkrefs));
+ any++;
+ }
+ }
+ if ((dd->ipath_pkeys[i] & 0x7FFF) == lkey) {
+ /*
+ * It makes no sense to have both the limited and
+ * full membership PKEY set at the same time since
+ * the unlimited one will disable the limited one.
+ */
+ return -EEXIST;
+ }
+ }
+ if (!any) {
+ ipath_dbg("port %u, all pkeys already in use, "
+ "can't set %x\n", pd->port_port, key);
+ return -EBUSY;
+ }
+ for (any = i = 0; i < ARRAY_SIZE(dd->ipath_pkeys); i++) {
+ if (!dd->ipath_pkeys[i] &&
+ atomic_inc_return(&dd->ipath_pkeyrefs[i]) == 1) {
+ u64 pkey;
+
+ /* for ipathstats, etc. */
+ ipath_stats.sps_pkeys[i] = lkey;
+ pd->port_pkeys[pidx] = dd->ipath_pkeys[i] = key;
+ pkey =
+ (u64) dd->ipath_pkeys[0] |
+ ((u64) dd->ipath_pkeys[1] << 16) |
+ ((u64) dd->ipath_pkeys[2] << 32) |
+ ((u64) dd->ipath_pkeys[3] << 48);
+ ipath_cdbg(PROC, "p%u set key %x in #%d, "
+ "portidx %d, new pkey reg %llx\n",
+ pd->port_port, key, i, pidx,
+ (unsigned long long) pkey);
+ ipath_write_kreg(
+ dd, dd->ipath_kregs->kr_partitionkey, pkey);
+
+ return 0;
+ }
+ }
+ ipath_dbg("port %u, all pkeys already in use 2nd pass, "
+ "can't set %x\n", pd->port_port, key);
+ return -EBUSY;
+}
+
+/**
+ * ipath_manage_rcvq - manage a port's receive queue
+ * @pd: the port
+ * @start_stop: action to carry out
+ *
+ * start_stop == 0 disables receive on the port, for use in queue
+ * overflow conditions. start_stop==1 re-enables, to be used to
+ * re-init the software copy of the head register
+ */
+static int ipath_manage_rcvq(struct ipath_portdata *pd, int start_stop)
+{
+ struct ipath_devdata *dd = pd->port_dd;
+ u64 tval;
+
+ ipath_cdbg(PROC, "%sabling rcv for unit %u port %u\n",
+ start_stop ? "en" : "dis", dd->ipath_unit,
+ pd->port_port);
+ /* atomically clear receive enable port. */
+ if (start_stop) {
+ /*
+ * On enable, force in-memory copy of the tail register to
+ * 0, so that protocol code doesn't have to worry about
+ * whether or not the chip has yet updated the in-memory
+ * copy or not on return from the system call. The chip
+ * always resets it's tail register back to 0 on a
+ * transition from disabled to enabled. This could cause a
+ * problem if software was broken, and did the enable w/o
+ * the disable, but eventually the in-memory copy will be
+ * updated and correct itself, even in the face of software
+ * bugs.
+ */
+ *pd->port_rcvhdrtail_kvaddr = 0;
+ set_bit(INFINIPATH_R_PORTENABLE_SHIFT + pd->port_port,
+ &dd->ipath_rcvctrl);
+ } else
+ clear_bit(INFINIPATH_R_PORTENABLE_SHIFT + pd->port_port,
+ &dd->ipath_rcvctrl);
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl,
+ dd->ipath_rcvctrl);
+ /* now be sure chip saw it before we return */
+ tval = ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch);
+ if (start_stop) {
+ /*
+ * And try to be sure that tail reg update has happened too.
+ * This should in theory interlock with the RXE changes to
+ * the tail register. Don't assign it to the tail register
+ * in memory copy, since we could overwrite an update by the
+ * chip if we did.
+ */
+ tval = ipath_read_ureg32(dd, ur_rcvhdrtail, pd->port_port);
+ }
+ /* always; new head should be equal to new tail; see above */
+ return 0;
+}
+
+static void ipath_clean_part_key(struct ipath_portdata *pd,
+ struct ipath_devdata *dd)
+{
+ int i, j, pchanged = 0;
+ u64 oldpkey;
+
+ /* for debugging only */
+ oldpkey = (u64) dd->ipath_pkeys[0] |
+ ((u64) dd->ipath_pkeys[1] << 16) |
+ ((u64) dd->ipath_pkeys[2] << 32) |
+ ((u64) dd->ipath_pkeys[3] << 48);
+
+ for (i = 0; i < (sizeof(pd->port_pkeys) /
+ sizeof(pd->port_pkeys[0])); i++) {
+ if (!pd->port_pkeys[i])
+ continue;
+ ipath_cdbg(VERBOSE, "look for key[%d] %hx in pkeys\n", i,
+ pd->port_pkeys[i]);
+ for (j = 0;
+ j < sizeof(dd->ipath_pkeys) /
+ sizeof(dd->ipath_pkeys[0]); j++) {
+ /* check for match independent of the global bit */
+ if ((dd->ipath_pkeys[j] & 0x7fff) ==
+ (pd->port_pkeys[i] & 0x7fff)) {
+ if (atomic_dec_and_test(
+ &dd->ipath_pkeyrefs[j])) {
+ ipath_cdbg(VERBOSE, "p%u clear key "
+ "%x matches #%d\n",
+ pd->port_port,
+ pd->port_pkeys[i], j);
+ ipath_stats.sps_pkeys[j] =
+ dd->ipath_pkeys[j] = 0;
+ pchanged++;
+ }
+ else ipath_cdbg(
+ VERBOSE, "p%u key %x matches #%d, "
+ "but ref still %d\n", pd->port_port,
+ pd->port_pkeys[i], j,
+ atomic_read(&dd->ipath_pkeyrefs[j]));
+ break;
+ }
+ }
+ pd->port_pkeys[i] = 0;
+ }
+ if (pchanged) {
+ u64 pkey = (u64) dd->ipath_pkeys[0] |
+ ((u64) dd->ipath_pkeys[1] << 16) |
+ ((u64) dd->ipath_pkeys[2] << 32) |
+ ((u64) dd->ipath_pkeys[3] << 48);
+ ipath_cdbg(VERBOSE, "p%u old pkey reg %llx, "
+ "new pkey reg %llx\n", pd->port_port,
+ (unsigned long long) oldpkey,
+ (unsigned long long) pkey);
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_partitionkey,
+ pkey);
+ }
+}
+
+/**
+ * ipath_create_user_egr - allocate eager TID buffers
+ * @pd: the port to allocate TID buffers for
+ *
+ * This routine is now quite different for user and kernel, because
+ * the kernel uses skb's, for the accelerated network performance
+ * This is the user port version
+ *
+ * Allocate the eager TID buffers and program them into infinipath
+ * They are no longer completely contiguous, we do multiple allocation
+ * calls.
+ */
+static int ipath_create_user_egr(struct ipath_portdata *pd)
+{
+ struct ipath_devdata *dd = pd->port_dd;
+ unsigned e, egrcnt, alloced, egrperchunk, chunk, egrsize, egroff;
+ size_t size;
+ int ret;
+
+ egrcnt = dd->ipath_rcvegrcnt;
+ /* TID number offset for this port */
+ egroff = pd->port_port * egrcnt;
+ egrsize = dd->ipath_rcvegrbufsize;
+ ipath_cdbg(VERBOSE, "Allocating %d egr buffers, at egrtid "
+ "offset %x, egrsize %u\n", egrcnt, egroff, egrsize);
+
+ /*
+ * to avoid wasting a lot of memory, we allocate 32KB chunks of
+ * physically contiguous memory, advance through it until used up
+ * and then allocate more. Of course, we need memory to store those
+ * extra pointers, now. Started out with 256KB, but under heavy
+ * memory pressure (creating large files and then copying them over
+ * NFS while doing lots of MPI jobs), we hit some allocation
+ * failures, even though we can sleep... (2.6.10) Still get
+ * failures at 64K. 32K is the lowest we can go without waiting
+ * more memory again. It seems likely that the coalescing in
+ * free_pages, etc. still has issues (as it has had previously
+ * during 2.6.x development).
+ */
+ size = 0x8000;
+ alloced = ALIGN(egrsize * egrcnt, size);
+ egrperchunk = size / egrsize;
+ chunk = (egrcnt + egrperchunk - 1) / egrperchunk;
+ pd->port_rcvegrbuf_chunks = chunk;
+ pd->port_rcvegrbufs_perchunk = egrperchunk;
+ pd->port_rcvegrbuf_size = size;
+ pd->port_rcvegrbuf = vmalloc(chunk * sizeof(pd->port_rcvegrbuf[0]));
+ if (!pd->port_rcvegrbuf) {
+ ret = -ENOMEM;
+ goto bail;
+ }
+ pd->port_rcvegrbuf_phys =
+ vmalloc(chunk * sizeof(pd->port_rcvegrbuf_phys[0]));
+ if (!pd->port_rcvegrbuf_phys) {
+ ret = -ENOMEM;
+ goto bail_rcvegrbuf;
+ }
+ for (e = 0; e < pd->port_rcvegrbuf_chunks; e++) {
+ /*
+ * GFP_USER, but without GFP_FS, so buffer cache can be
+ * coalesced (we hope); otherwise, even at order 4,
+ * heavy filesystem activity makes these fail
+ */
+ pd->port_rcvegrbuf[e] =
+ dma_alloc_coherent(&dd->pcidev->dev, size,
+ &pd->port_rcvegrbuf_phys[e],
+ __GFP_WAIT | __GFP_IO);
+ if (!pd->port_rcvegrbuf[e]) {
+ ret = -ENOMEM;
+ goto bail_rcvegrbuf_phys;
+ }
+ }
+
+ pd->port_rcvegr_phys = pd->port_rcvegrbuf_phys[0];
+
+ for (e = chunk = 0; chunk < pd->port_rcvegrbuf_chunks; chunk++) {
+ void *buf = pd->port_rcvegrbuf[chunk];
+ dma_addr_t pa = pd->port_rcvegrbuf_phys[chunk];
+ unsigned i;
+ size_t x;
+
+ for (x = 0; x < size; x += PAGE_SIZE)
+ SetPageReserved(virt_to_page(buf + x));
+
+ for (i = 0; e < egrcnt && i < egrperchunk; e++, i++) {
+ dd->ipath_f_put_tid(dd, (e + egroff)+ (u64 __iomem *)
+ ((char __iomem *) dd->ipath_kregbase
+ + dd->ipath_rcvegrbase), 0, pa);
+ pa += egrsize;
+ }
+ yield(); /* don't hog the cpu */
+ }
+
+ ret = 0;
+ goto bail;
+
+bail_rcvegrbuf_phys:
+ for (e = 0; e < pd->port_rcvegrbuf_chunks &&
+ pd->port_rcvegrbuf[e]; e++)
+ dma_free_coherent(&dd->pcidev->dev, size,
+ pd->port_rcvegrbuf[e],
+ pd->port_rcvegrbuf_phys[e]);
+
+ vfree(pd->port_rcvegrbuf_phys);
+ pd->port_rcvegrbuf_phys = NULL;
+bail_rcvegrbuf:
+ vfree(pd->port_rcvegrbuf);
+ pd->port_rcvegrbuf = NULL;
+bail:
+ return ret;
+}
+
+static int ipath_do_user_init(struct ipath_portdata *pd,
+ const struct ipath_user_info *uinfo)
+{
+ int ret = 0;
+ struct ipath_devdata *dd = pd->port_dd;
+ u64 physaddr, uaddr, off, atmp;
+ struct page *pagep;
+ u32 head32;
+ u64 head;
+
+ /* for now, if major version is different, bail */
+ if ((uinfo->spu_userversion >> 16) != IPATH_USER_SWMAJOR) {
+ dev_info(&dd->pcidev->dev,
+ "User major version %d not same as driver "
+ "major %d\n", uinfo->spu_userversion >> 16,
+ IPATH_USER_SWMAJOR);
+ ret = -ENODEV;
+ goto done;
+ }
+
+ if ((uinfo->spu_userversion & 0xffff) != IPATH_USER_SWMINOR)
+ ipath_dbg("User minor version %d not same as driver "
+ "minor %d\n", uinfo->spu_userversion & 0xffff,
+ IPATH_USER_SWMINOR);
+
+ if (uinfo->spu_rcvhdrsize) {
+ ret = ipath_setrcvhdrsize(dd, uinfo->spu_rcvhdrsize);
+ if (ret)
+ goto done;
+ }
+
+ /* for now we do nothing with rcvhdrcnt: uinfo->spu_rcvhdrcnt */
+
+ /* set up for the rcvhdr Q tail register writeback to user memory */
+ if (!uinfo->spu_rcvhdraddr ||
+ !access_ok(VERIFY_WRITE, (u64 __user *) (unsigned long)
+ uinfo->spu_rcvhdraddr, sizeof(u64))) {
+ ipath_dbg("Port %d rcvhdrtail addr %llx not valid\n",
+ pd->port_port,
+ (unsigned long long) uinfo->spu_rcvhdraddr);
+ ret = -EINVAL;
+ goto done;
+ }
+
+ off = offset_in_page(uinfo->spu_rcvhdraddr);
+ uaddr = PAGE_MASK & (unsigned long) uinfo->spu_rcvhdraddr;
+ ret = ipath_get_user_pages_nocopy(uaddr, &pagep);
+ if (ret) {
+ dev_info(&dd->pcidev->dev, "Failed to lookup and lock "
+ "address %llx for rcvhdrtail: errno %d\n",
+ (unsigned long long) uinfo->spu_rcvhdraddr, -ret);
+ goto done;
+ }
+ ipath_stats.sps_pagelocks++;
+ pd->port_rcvhdrtail_uaddr = uaddr;
+ pd->port_rcvhdrtail_pagep = pagep;
+ pd->port_rcvhdrtail_kvaddr =
+ page_address(pagep);
+ pd->port_rcvhdrtail_kvaddr += off;
+ physaddr = page_to_phys(pagep) + off;
+ ipath_cdbg(VERBOSE, "port %d user addr %llx hdrtailaddr, %llx "
+ "physical (off=%llx)\n",
+ pd->port_port,
+ (unsigned long long) uinfo->spu_rcvhdraddr,
+ (unsigned long long) physaddr, (unsigned long long) off);
+ ipath_write_kreg_port(dd, dd->ipath_kregs->kr_rcvhdrtailaddr,
+ pd->port_port, physaddr);
+ atmp = ipath_read_kreg64_port(dd,
+ dd->ipath_kregs->kr_rcvhdrtailaddr,
+ pd->port_port);
+ if (physaddr != atmp) {
+ ipath_dev_err(dd,
+ "Catastrophic software error, "
+ "RcvHdrTailAddr%u written as %llx, "
+ "read back as %llx\n", pd->port_port,
+ (unsigned long long) physaddr,
+ (unsigned long long) atmp);
+ ret = -EINVAL;
+ goto done;
+ }
+
+ /* for right now, kernel piobufs are at end, so port 1 is at 0 */
+ pd->port_piobufs = dd->ipath_piobufbase +
+ dd->ipath_pbufsport * (pd->port_port -
+ 1) * dd->ipath_palign;
+ ipath_cdbg(VERBOSE, "Set base of piobufs for port %u to 0x%x\n",
+ pd->port_port, pd->port_piobufs);
+
+ /*
+ * Now allocate the rcvhdr Q and eager TIDs; skip the TID
+ * array for time being. If pd->port_port > chip-supported,
+ * we need to do extra stuff here to handle by handling overflow
+ * through port 0, someday
+ */
+ ret = ipath_create_rcvhdrq(dd, pd);
+ if (!ret)
+ ret = ipath_create_user_egr(pd);
+ if (ret)
+ goto done;
+ /* enable receives now */
+ /* atomically set enable bit for this port */
+ set_bit(INFINIPATH_R_PORTENABLE_SHIFT + pd->port_port,
+ &dd->ipath_rcvctrl);
+
+ /*
+ * set the head registers for this port to the current values
+ * of the tail pointers, since we don't know if they were
+ * updated on last use of the port.
+ */
+ head32 = ipath_read_ureg32(dd, ur_rcvhdrtail, pd->port_port);
+ head = (u64) head32;
+ ipath_write_ureg(dd, ur_rcvhdrhead, head, pd->port_port);
+ head32 = ipath_read_ureg32(dd, ur_rcvegrindextail, pd->port_port);
+ ipath_write_ureg(dd, ur_rcvegrindexhead, head32, pd->port_port);
+ dd->ipath_lastegrheads[pd->port_port] = -1;
+ dd->ipath_lastrcvhdrqtails[pd->port_port] = -1;
+ ipath_cdbg(VERBOSE, "Wrote port%d head %llx, egrhead %x from "
+ "tail regs\n", pd->port_port,
+ (unsigned long long) head, head32);
+ pd->port_tidcursor = 0; /* start at beginning after open */
+ /*
+ * now enable the port; the tail registers will be written to memory
+ * by the chip as soon as it sees the write to
+ * dd->ipath_kregs->kr_rcvctrl. The update only happens on
+ * transition from 0 to 1, so clear it first, then set it as part of
+ * enabling the port. This will (very briefly) affect any other
+ * open ports, but it shouldn't be long enough to be an issue.
+ */
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl,
+ dd->ipath_rcvctrl & ~INFINIPATH_R_TAILUPD);
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl,
+ dd->ipath_rcvctrl);
+
+done:
+ return ret;
+}
+
+static struct vm_operations_struct ipath_vmops = {
+ .nopage = ipath_nopage,
+};
+
+/**
+ * ipath_mmap - mmap various structures into user space
+ * @fp: the file pointer
+ * @vm: the VM area
+ *
+ * We use this to have a shared buffer between the kernel and the user code
+ * for the rcvhdr queue, egr buffers, and the per-port user regs and pio
+ * buffers in the chip. We have the open and close entries so we can bump
+ * the ref count and keep the driver from being unloaded while still mapped.
+ */
+
+static int ipath_mmap(struct file *fp, struct vm_area_struct *vm)
+{
+ int setlen = 0, ret = -EINVAL;
+ struct ipath_portdata *pd;
+ struct ipath_devdata *dd;
+ u64 pgaddr, ureg;
+
+ pd = port_fp(fp);
+ dd = pd->port_dd;
+ /*
+ * This is the ipath_do_user_init() code, mapping the shared
+ * buffers into the user process. The address referred to by
+ * vm_pgoff is the virtual, not physical, address; we only
+ * do one mmap for each space mapped.
+ */
+ pgaddr = vm->vm_pgoff << PAGE_SHIFT;
+
+ /*
+ * note that ureg does *NOT* have the kregvirt as part of it, to
+ * be sure that for 32 bit programs, we don't end up trying to map
+ * a > 44 address. Has to match ipath_get_base_info()
+ * code that sets __spi_uregbase
+ */
+
+ ureg = dd->ipath_uregbase + dd->ipath_palign * pd->port_port;
+
+ ipath_cdbg(MM, "ushare: pgaddr %llx vm_start=%lx, vmlen %lx\n",
+ (unsigned long long) pgaddr, vm->vm_start,
+ vm->vm_end - vm->vm_start);
+
+ if (pgaddr == ureg) {
+ /* it's the real hardware, so io_remap works */
+ unsigned long phys;
+ if ((vm->vm_end - vm->vm_start) > PAGE_SIZE) {
+ dev_info(&dd->pcidev->dev,
+ "FAIL mmap userreg: reqlen %lx > "
+ "PAGE\n", vm->vm_end - vm->vm_start);
+ ret = -EFAULT;
+ } else {
+ phys = dd->ipath_physaddr + ureg;
+ vm->vm_page_prot = pgprot_noncached(
+ vm->vm_page_prot);
+
+ vm->vm_flags |= VM_DONTCOPY | VM_DONTEXPAND |
+ VM_IO | VM_SHM | VM_LOCKED;
+ ret = io_remap_pfn_range(
+ vm, vm->vm_start, phys >> PAGE_SHIFT,
+ vm->vm_end - vm->vm_start,
+ vm->vm_page_prot);
+ }
+ } else if (pgaddr == pd->port_piobufs) {
+ /*
+ * We use io_remap, so there is not a nopage handler
+ * for this case!
+ * when we map the PIO buffers, we want to map them
+ * as writeonly, no read possible.
+ */
+
+ unsigned long phys;
+ if ((vm->vm_end - vm->vm_start) >
+ (dd->ipath_pbufsport * dd->ipath_palign)) {
+ dev_info(&dd->pcidev->dev,
+ "FAIL mmap piobufs: reqlen %lx > "
+ "PAGE\n", vm->vm_end - vm->vm_start);
+ ret = -EFAULT;
+ } else {
+ phys = dd->ipath_physaddr + pd->port_piobufs;
+ /*
+ * Do *NOT* mark this as non-cached (PWT bit), or
+ * we don't get the write combining behavior we want
+ * on the PIO buffers!
+ * vm->vm_page_prot =
+ * pgprot_noncached(vm->vm_page_prot);
+ */
+
+#if defined (pgprot_writecombine) && defined(_PAGE_MA_WC)
+ /* Enable WC */
+ vm->vm_page_prot = pgprot_writecombine(
+ vm->vm_page_prot);
+#endif
+
+ if (vm->vm_flags & VM_READ) {
+ dev_info(&dd->pcidev->dev,
+ "Can't map piobufs as "
+ "readable (flags=%lx)\n",
+ vm->vm_flags);
+ ret = -EPERM;
+ } else {
+ /*
+ * don't allow them to later change
+ * to readable with mprotect
+ */
+
+ vm->vm_flags &= ~VM_MAYWRITE;
+
+ vm->vm_flags |= VM_DONTCOPY |
+ VM_DONTEXPAND | VM_IO |
+ VM_SHM | VM_LOCKED;
+ ret = io_remap_pfn_range(
+ vm, vm->vm_start,
+ phys >> PAGE_SHIFT,
+ vm->vm_end - vm->vm_start,
+ vm->vm_page_prot);
+ }
+ }
+ } else if (pgaddr == (u64) pd->port_rcvegr_phys) {
+ if (!pd->port_rcvegrbuf)
+ return -EFAULT;
+ /*
+ * page_alloc'ed egr memory, not physically contiguous *BUT*
+ * to work around the 32 bit mmap64 only handling 44 bits,
+ * we have remapped the first page to kernel virtual, so we
+ * have to do the conversion here to get back to the
+ * original virtual address (not contig pages) so we have to
+ * mark this for special handling.
+ */
+
+ /*
+ * not egrbufs * egrsize since they are no longer virtually
+ * contiguous.
+ */
+ setlen = pd->port_rcvegrbuf_chunks *
+ pd->port_rcvegrbuf_size;
+ if ((vm->vm_end - vm->vm_start) > setlen) {
+ dev_info(&dd->pcidev->dev, "FAIL on egr bufs: "
+ "reqlen %lx > actual %x\n",
+ vm->vm_end - vm->vm_start, setlen);
+ ret = -EFAULT;
+ } else {
+ vm->vm_ops = &ipath_vmops;
+ vm->vm_private_data =
+ (void *)(3 | (unsigned long)pd);
+ if (vm->vm_flags & VM_WRITE) {
+ dev_info(&dd->pcidev->dev,
+ "Can't map eager buffers as "
+ "writable (flags=%lx)\n",
+ vm->vm_flags);
+ ret = -EPERM;
+ } else {
+ /*
+ * don't allow them to later change
+ * to writeable with mprotect
+ */
+
+ vm->vm_flags &= ~VM_MAYWRITE;
+ ipath_cdbg(MM, "egrbufs, set private to "
+ " %p, not %llx\n",
+ vm->vm_private_data,
+ (unsigned long long) pgaddr);
+ ret = 0;
+ }
+ }
+ } else if (pgaddr == (u64) pd->port_rcvhdrq_phys) {
+ /*
+ * kmalloc'ed memory, physically contiguous; this is from
+ * spi_rcvhdr_base; we allow user to map read-write so they
+ * can write hdrq entries to allow protocol code to directly
+ * poll whether a hdrq entry has been written.
+ */
+ setlen = ALIGN(dd->ipath_rcvhdrcnt *
+ dd->ipath_rcvhdrentsize * sizeof(u32),
+ PAGE_SIZE);
+ if ((vm->vm_end - vm->vm_start) > setlen) {
+ dev_info(&dd->pcidev->dev,
+ "FAIL on rcvhdrq: reqlen %lx > "
+ "actual %x\n",
+ vm->vm_end - vm->vm_start, setlen);
+ ret = -EFAULT;
+ } else {
+ vm->vm_ops = &ipath_vmops;
+ vm->vm_private_data = (void *)((unsigned long)
+ pgaddr | 1);
+ ret = 0;
+ }
+ }
+ /*
+ * when we map the PIO bufferavail registers, we want to
+ * map them as readonly, no read possible.
+ */
+ else if (pgaddr == dd->ipath_pioavailregs_phys) {
+ /*
+ * kmalloc'ed memory, physically contiguous, one page
+ * only, readonly
+ */
+ setlen = PAGE_SIZE;
+ if ((vm->vm_end - vm->vm_start) > setlen) {
+ dev_info(&dd->pcidev->dev,
+ "FAIL on pioavailregs_dma: reqlen "
+ "%lx > actual %x\n",
+ vm->vm_end - vm->vm_start, setlen);
+ ret = -EFAULT;
+ } else if (vm->vm_flags & VM_WRITE) {
+ dev_info(&dd->pcidev->dev,
+ "Can't map pioavailregs as writable "
+ "(flags=%lx)\n", vm->vm_flags);
+ ret = -EPERM;
+ } else {
+ /* don't allow them to later change with mprotect */
+ vm->vm_flags &= ~VM_MAYWRITE;
+ vm->vm_ops = &ipath_vmops;
+ vm->vm_private_data = (void *)((unsigned long)
+ pgaddr | 2);
+ ret = 0;
+ }
+ }
+ if (!ret && setlen) {
+ /* keep page(s) from being swapped, etc. */
+ vm->vm_flags |= VM_DONTEXPAND | VM_DONTCOPY |
+ VM_RESERVED | VM_IO | VM_SHM;
+ } else {
+ vm->vm_private_data = NULL; /* failure, or io_remap case */
+ if (ret)
+ dev_info(&dd->pcidev->dev,
+ "Failure %d, setlen %d, on addr %lx, "
+ "off %lx\n", ret, setlen,
+ vm->vm_start, vm->vm_pgoff);
+ }
+
+ return ret;
+}
+
+static unsigned int ipath_poll(struct file *fp,
+ struct poll_table_struct *pt)
+{
+ struct ipath_portdata *pd;
+ u32 head, tail;
+ int bit;
+ struct ipath_devdata *dd;
+
+ pd = port_fp(fp);
+ dd = pd->port_dd;
+
+ bit = pd->port_port + INFINIPATH_R_INTRAVAIL_SHIFT;
+ set_bit(bit, &dd->ipath_rcvctrl);
+
+ /*
+ * Before blocking, make sure that head is still == tail,
+ * reading from the chip, so we can be sure the interrupt
+ * enable has made it to the chip. If not equal, disable
+ * interrupt again and return immediately. This avoids races,
+ * and the overhead of the chip read doesn't matter much at
+ * this point, since we are waiting for something anyway.
+ */
+
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl,
+ dd->ipath_rcvctrl);
+
+ head = ipath_read_ureg32(dd, ur_rcvhdrhead, pd->port_port);
+ tail = ipath_read_ureg32(dd, ur_rcvhdrtail, pd->port_port);
+
+ if (tail == head) {
+ set_bit(IPATH_PORT_WAITING_RCV, &pd->port_flag);
+ poll_wait(fp, &pd->port_wait, pt);
+
+ if (test_bit(IPATH_PORT_WAITING_RCV, &pd->port_flag)) {
+ /* timed out, no packets received */
+ clear_bit(IPATH_PORT_WAITING_RCV, &pd->port_flag);
+ pd->port_rcvwait_to++;
+ }
+ }
+ else {
+ /* it's already happened; don't do wait_event overhead */
+ pd->port_rcvnowait++;
+ }
+
+ clear_bit(bit, &dd->ipath_rcvctrl);
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl,
+ dd->ipath_rcvctrl);
+
+ return 0;
+}
+
+static int try_alloc_port(struct ipath_devdata *dd, int port,
+ struct file *fp)
+{
+ int ret;
+
+ if (!dd->ipath_pd[port]) {
+ void *p, *ptmp;
+
+ p = kzalloc(sizeof(struct ipath_portdata), GFP_KERNEL);
+
+ /*
+ * Allocate memory for use in ipath_tid_update() just once
+ * at open, not per call. Reduces cost of expected send
+ * setup.
+ */
+ ptmp = kmalloc(dd->ipath_rcvtidcnt * sizeof(u16) +
+ dd->ipath_rcvtidcnt * sizeof(struct page **),
+ GFP_KERNEL);
+ if (!p || !ptmp) {
+ ipath_dev_err(dd, "Unable to allocate portdata "
+ "memory, failing open\n");
+ ret = -ENOMEM;
+ kfree(p);
+ kfree(ptmp);
+ goto bail;
+ }
+ dd->ipath_pd[port] = p;
+ dd->ipath_pd[port]->port_port = port;
+ dd->ipath_pd[port]->port_dd = dd;
+ dd->ipath_pd[port]->port_tid_pg_list = ptmp;
+ init_waitqueue_head(&dd->ipath_pd[port]->port_wait);
+ }
+ if (!dd->ipath_pd[port]->port_cnt) {
+ dd->ipath_pd[port]->port_cnt = 1;
+ fp->private_data = (void *) dd->ipath_pd[port];
+ ipath_cdbg(PROC, "%s[%u] opened unit:port %u:%u\n",
+ current->comm, current->pid, dd->ipath_unit,
+ port);
+ dd->ipath_pd[port]->port_pid = current->pid;
+ strncpy(dd->ipath_pd[port]->port_comm, current->comm,
+ sizeof(dd->ipath_pd[port]->port_comm));
+ ipath_stats.sps_ports++;
+ ret = 0;
+ goto bail;
+ }
+ ret = -EBUSY;
+
+bail:
+ return ret;
+}
+
+static inline int usable(struct ipath_devdata *dd)
+{
+ return dd &&
+ (dd->ipath_flags & IPATH_PRESENT) &&
+ dd->ipath_kregbase &&
+ dd->ipath_lid &&
+ !(dd->ipath_flags & (IPATH_LINKDOWN | IPATH_LINKUNK));
+}
+
+static int find_free_port(int unit, struct file *fp)
+{
+ struct ipath_devdata *dd = ipath_lookup(unit);
+ int ret, i;
+
+ if (!dd) {
+ ret = -ENODEV;
+ goto bail;
+ }
+
+ if (!usable(dd)) {
+ ret = -ENETDOWN;
+ goto bail;
+ }
+
+ for (i = 0; i < dd->ipath_cfgports; i++) {
+ ret = try_alloc_port(dd, i, fp);
+ if (ret != -EBUSY)
+ goto bail;
+ }
+ ret = -EBUSY;
+
+bail:
+ return ret;
+}
+
+static int find_best_unit(struct file *fp)
+{
+ int ret = 0, i, prefunit = -1, devmax;
+ int maxofallports, npresent, nup;
+ int ndev;
+
+ (void) ipath_count_units(&npresent, &nup, &maxofallports);
+
+ /*
+ * This code is present to allow a knowledgeable person to
+ * specify the layout of processes to processors before opening
+ * this driver, and then we'll assign the process to the "closest"
+ * HT-400 to that processor (we assume reasonable connectivity,
+ * for now). This code assumes that if affinity has been set
+ * before this point, that at most one cpu is set; for now this
+ * is reasonable. I check for both cpus_empty() and cpus_full(),
+ * in case some kernel variant sets none of the bits when no
+ * affinity is set. 2.6.11 and 12 kernels have all present
+ * cpus set. Some day we'll have to fix it up further to handle
+ * a cpu subset. This algorithm fails for two HT-400's connected
+ * in tunnel fashion. Eventually this needs real topology
+ * information. There may be some issues with dual core numbering
+ * as well. This needs more work prior to release.
+ */
+ if (!cpus_empty(current->cpus_allowed) &&
+ !cpus_full(current->cpus_allowed)) {
+ int ncpus = num_online_cpus(), curcpu = -1;
+ for (i = 0; i < ncpus; i++)
+ if (cpu_isset(i, current->cpus_allowed)) {
+ ipath_cdbg(PROC, "%s[%u] affinity set for "
+ "cpu %d\n", current->comm,
+ current->pid, i);
+ curcpu = i;
+ }
+ if (curcpu != -1) {
+ if (npresent) {
+ prefunit = curcpu / (ncpus / npresent);
+ ipath_dbg("%s[%u] %d chips, %d cpus, "
+ "%d cpus/chip, select unit %d\n",
+ current->comm, current->pid,
+ npresent, ncpus, ncpus / npresent,
+ prefunit);
+ }
+ }
+ }
+
+ /*
+ * for now, we use all ports on one, then all ports on the
+ * next, etc. Eventually we want to tweak this to be cpu/chip
+ * topology aware, and round-robin across chips that are
+ * configured and connected, placing processes on the closest
+ * available processor that isn't already over-allocated.
+ * multi-HT400 topology could be better handled
+ */
+
+ /*
+ * user ports start at 1, kernel port is 0
+ * For now, we do round-robin access across all chips
+ */
+
+ devmax = prefunit != -1 ? prefunit + 1 : atomic_read(&ipath_max);
+recheck:
+ for (i = 1; i < maxofallports; i++) {
+ for (ndev = prefunit != -1 ? prefunit : 0; ndev < devmax;
+ ndev++) {
+ struct ipath_devdata *dd = ipath_lookup(ndev);
+
+ if (!usable(dd))
+ break; /* can't use this chip */
+ if (i >= dd->ipath_cfgports)
+ /* max'ed out on users of this chip */
+ break;
+ ret = try_alloc_port(dd, i, fp);
+ if (ret != -EBUSY)
+ goto done;
+ }
+ }
+
+ if (npresent) {
+ if (nup == 0) {
+ ret = -ENETDOWN;
+ ipath_dbg("No ports available (none initialized "
+ "and ready)\n");
+ } else {
+ if (prefunit > 0) {
+ /* if started above 0, retry from 0 */
+ ipath_cdbg(PROC,
+ "%s[%u] no ports on prefunit "
+ "%d, clear and re-check\n",
+ current->comm, current->pid,
+ prefunit);
+ devmax = atomic_read(&ipath_max);
+ prefunit = -1;
+ goto recheck;
+ }
+ ret = -EBUSY;
+ ipath_dbg("No ports available\n");
+ }
+ } else {
+ ret = -ENXIO;
+ ipath_dbg("No boards found\n");
+ }
+
+done:
+ return ret;
+}
+
+static int ipath_open(struct inode *in, struct file *fp)
+{
+ int ret, minor;
+
+ mutex_lock(&ipath_mutex);
+
+ minor = iminor(in);
+ ipath_cdbg(VERBOSE, "open on dev %lx (minor %d)\n",
+ (long)in->i_rdev, minor);
+
+ if (minor)
+ ret = find_free_port(minor - 1, fp);
+ else
+ ret = find_best_unit(fp);
+
+ mutex_unlock(&ipath_mutex);
+ return ret;
+}
+
+static int ipath_close(struct inode *in, struct file *fp)
+{
+ int ret = 0;
+ struct ipath_portdata *pd;
+ struct ipath_devdata *dd;
+ unsigned port;
+
+ ipath_cdbg(VERBOSE, "close on dev %lx, private data %p\n",
+ (long)in->i_rdev, fp->private_data);
+
+ mutex_lock(&ipath_mutex);
+
+ pd = port_fp(fp);
+ port = pd->port_port;
+ fp->private_data = NULL;
+ dd = pd->port_dd;
+
+ if (pd->port_hdrqfull) {
+ ipath_cdbg(PROC, "%s[%u] had %u rcvhdrqfull errors "
+ "during run\n", pd->port_comm, pd->port_pid,
+ pd->port_hdrqfull);
+ pd->port_hdrqfull = 0;
+ }
+
+ if (pd->port_rcvwait_to || pd->port_piowait_to
+ || pd->port_rcvnowait || pd->port_pionowait) {
+ ipath_cdbg(VERBOSE, "port%u, %u rcv, %u pio wait timeo; "
+ "%u rcv %u, pio already\n",
+ pd->port_port, pd->port_rcvwait_to,
+ pd->port_piowait_to, pd->port_rcvnowait,
+ pd->port_pionowait);
+ pd->port_rcvwait_to = pd->port_piowait_to =
+ pd->port_rcvnowait = pd->port_pionowait = 0;
+ }
+ if (pd->port_flag) {
+ ipath_dbg("port %u port_flag still set to 0x%lx\n",
+ pd->port_port, pd->port_flag);
+ pd->port_flag = 0;
+ }
+
+ if (dd->ipath_kregbase) {
+ if (pd->port_rcvhdrtail_uaddr) {
+ pd->port_rcvhdrtail_uaddr = 0;
+ pd->port_rcvhdrtail_kvaddr = NULL;
+ ipath_release_user_pages_on_close(
+ &pd->port_rcvhdrtail_pagep, 1);
+ pd->port_rcvhdrtail_pagep = NULL;
+ ipath_stats.sps_pageunlocks++;
+ }
+ ipath_write_kreg_port(
+ dd, dd->ipath_kregs->kr_rcvhdrtailaddr,
+ port, 0ULL);
+ ipath_write_kreg_port(
+ dd, dd->ipath_kregs->kr_rcvhdraddr,
+ pd->port_port, 0);
+
+ /* clean up the pkeys for this port user */
+ ipath_clean_part_key(pd, dd);
+
+ if (port < dd->ipath_cfgports) {
+ int i = dd->ipath_pbufsport * (port - 1);
+ ipath_disarm_piobufs(dd, i, dd->ipath_pbufsport);
+
+ /* atomically clear receive enable port. */
+ clear_bit(INFINIPATH_R_PORTENABLE_SHIFT + port,
+ &dd->ipath_rcvctrl);
+ ipath_write_kreg(
+ dd,
+ dd->ipath_kregs->kr_rcvctrl,
+ dd->ipath_rcvctrl);
+
+ if (dd->ipath_pageshadow) {
+ /*
+ * unlock any expected TID entries port
+ * still had in use. We don't actually
+ * update the chip here, because we do
+ * a bulk update below, using
+ * ipath_f_clear_tids
+ */
+ int port_tidbase =
+ pd->port_port * dd->ipath_rcvtidcnt;
+ int i, cnt = 0, maxtid =
+ port_tidbase + dd->ipath_rcvtidcnt;
+
+ ipath_cdbg(VERBOSE, "Port %u unlocking any "
+ "locked expTID pages\n",
+ pd->port_port);
+ for (i = port_tidbase; i < maxtid; i++) {
+ if (dd->ipath_pageshadow[i]) {
+ ipath_release_user_pages_on_close(
+ &dd->ipath_pageshadow[i], 1);
+ dd->ipath_pageshadow[i]
+ = NULL;
+ cnt++;
+ ipath_stats.sps_pageunlocks++;
+ }
+ }
+ if (cnt)
+ ipath_cdbg(VERBOSE, "Port %u had %u "
+ "expTID entries locked\n",
+ pd->port_port, cnt);
+ if (ipath_stats.sps_pagelocks
+ || ipath_stats.sps_pageunlocks)
+ ipath_cdbg(VERBOSE, "%llu pages "
+ "locked, %llu unlocked "
+ "with ipath_m{un}lock\n",
+ (unsigned long long) ipath_stats.sps_pagelocks,
+ (unsigned long long) ipath_stats.sps_pageunlocks);
+ }
+ ipath_stats.sps_ports--;
+ ipath_cdbg(PROC, "%s[%u] closed port %u:%u\n",
+ pd->port_comm, pd->port_pid, dd->ipath_unit,
+ port);
+ }
+ }
+
+ pd->port_cnt = 0;
+ pd->port_pid = 0;
+
+ dd->ipath_f_clear_tids(dd, pd->port_port);
+
+ ipath_free_pddata(dd, pd->port_port, 0);
+
+ mutex_unlock(&ipath_mutex);
+
+ return ret;
+}
+
+static int ipath_port_info(struct ipath_portdata *pd,
+ struct ipath_port_info __user *uinfo)
+{
+ struct ipath_port_info info;
+ int nup;
+
+ (void) ipath_count_units(NULL, &nup, NULL);
+ info.num_active = nup;
+ info.unit = pd->port_dd->ipath_unit;
+ info.port = pd->port_port;
+
+ if (copy_to_user(uinfo, &info, sizeof(info)))
+ return -EFAULT;
+ else
+ return 0;
+}
+
+static ssize_t ipath_write(struct file *fp, const char __user *data,
+ size_t count, loff_t *off)
+{
+ const struct ipath_cmd __user *ucmd;
+ struct ipath_portdata *pd;
+ const void __user *src;
+ size_t consumed, copy;
+ struct ipath_cmd cmd;
+ ssize_t ret = 0;
+ void *dest;
+
+ if (count < sizeof(cmd.type)) {
+ ret = -EINVAL;
+ goto bail;
+ }
+
+ ucmd = (const struct ipath_cmd __user *) data;
+
+ if (copy_from_user(&cmd.type, &ucmd->type, sizeof(cmd.type))) {
+ ret = -EFAULT;
+ goto bail;
+ }
+
+ consumed = sizeof(cmd.type);
+
+ switch (cmd.type) {
+ case IPATH_CMD_USER_INIT:
+ copy = sizeof(cmd.cmd.user_info);
+ dest = &cmd.cmd.user_info;
+ src = &ucmd->cmd.user_info;
+ break;
+ case IPATH_CMD_RECV_CTRL:
+ copy = sizeof(cmd.cmd.recv_ctrl);
+ dest = &cmd.cmd.recv_ctrl;
+ src = &ucmd->cmd.recv_ctrl;
+ break;
+ case IPATH_CMD_PORT_INFO:
+ copy = sizeof(cmd.cmd.port_info);
+ dest = &cmd.cmd.port_info;
+ src = &ucmd->cmd.port_info;
+ break;
+ case IPATH_CMD_TID_UPDATE:
+ case IPATH_CMD_TID_FREE:
+ copy = sizeof(cmd.cmd.tid_info);
+ dest = &cmd.cmd.tid_info;
+ src = &ucmd->cmd.tid_info;
+ break;
+ case IPATH_CMD_SET_PART_KEY:
+ copy = sizeof(cmd.cmd.part_key);
+ dest = &cmd.cmd.part_key;
+ src = &ucmd->cmd.part_key;
+ break;
+ default:
+ ret = -EINVAL;
+ goto bail;
+ }
+
+ if ((count - consumed) < copy) {
+ ret = -EINVAL;
+ goto bail;
+ }
+
+ if (copy_from_user(dest, src, copy)) {
+ ret = -EFAULT;
+ goto bail;
+ }
+
+ consumed += copy;
+ pd = port_fp(fp);
+
+ switch (cmd.type) {
+ case IPATH_CMD_USER_INIT:
+ ret = ipath_do_user_init(pd, &cmd.cmd.user_info);
+ if (ret < 0)
+ goto bail;
+ ret = ipath_get_base_info(
+ pd, (void __user *) (unsigned long)
+ cmd.cmd.user_info.spu_base_info,
+ cmd.cmd.user_info.spu_base_info_size);
+ break;
+ case IPATH_CMD_RECV_CTRL:
+ ret = ipath_manage_rcvq(pd, cmd.cmd.recv_ctrl);
+ break;
+ case IPATH_CMD_PORT_INFO:
+ ret = ipath_port_info(pd,
+ (struct ipath_port_info __user *)
+ (unsigned long) cmd.cmd.port_info);
+ break;
+ case IPATH_CMD_TID_UPDATE:
+ ret = ipath_tid_update(pd, &cmd.cmd.tid_info);
+ break;
+ case IPATH_CMD_TID_FREE:
+ ret = ipath_tid_free(pd, &cmd.cmd.tid_info);
+ break;
+ case IPATH_CMD_SET_PART_KEY:
+ ret = ipath_set_part_key(pd, cmd.cmd.part_key);
+ break;
+ }
+
+ if (ret >= 0)
+ ret = consumed;
+
+bail:
+ return ret;
+}
+
+static struct class *ipath_class;
+
+static int init_cdev(int minor, char *name, struct file_operations *fops,
+ struct cdev **cdevp, struct class_device **class_devp)
+{
+ const dev_t dev = MKDEV(IPATH_MAJOR, minor);
+ struct cdev *cdev = NULL;
+ struct class_device *class_dev = NULL;
+ int ret;
+
+ cdev = cdev_alloc();
+ if (!cdev) {
+ printk(KERN_ERR IPATH_DRV_NAME
+ ": Could not allocate cdev for minor %d, %s\n",
+ minor, name);
+ ret = -ENOMEM;
+ goto done;
+ }
+
+ cdev->owner = THIS_MODULE;
+ cdev->ops = fops;
+ kobject_set_name(&cdev->kobj, name);
+
+ ret = cdev_add(cdev, dev, 1);
+ if (ret < 0) {
+ printk(KERN_ERR IPATH_DRV_NAME
+ ": Could not add cdev for minor %d, %s (err %d)\n",
+ minor, name, -ret);
+ goto err_cdev;
+ }
+
+ class_dev = class_device_create(ipath_class, NULL, dev, NULL, name);
+ if (IS_ERR(class_dev)) {
+ ret = PTR_ERR(class_dev);
+ printk(KERN_ERR IPATH_DRV_NAME ": Could not create "
+ "class_dev for minor %d, %s (err %d)\n",
+ minor, name, -ret);
+ goto err_cdev;
+ }
+
+ goto done;
+
+err_cdev:
+ cdev_del(cdev);
+ cdev = NULL;
+
+done:
+ if (ret >= 0) {
+ *cdevp = cdev;
+ *class_devp = class_dev;
+ } else {
+ *cdevp = NULL;
+ *class_devp = NULL;
+ }
+
+ return ret;
+}
+
+int ipath_cdev_init(int minor, char *name, struct file_operations *fops,
+ struct cdev **cdevp, struct class_device **class_devp)
+{
+ return init_cdev(minor, name, fops, cdevp, class_devp);
+}
+
+static void cleanup_cdev(struct cdev **cdevp,
+ struct class_device **class_devp)
+{
+ struct class_device *class_dev = *class_devp;
+
+ if (class_dev) {
+ class_device_unregister(class_dev);
+ *class_devp = NULL;
+ }
+
+ if (*cdevp) {
+ cdev_del(*cdevp);
+ *cdevp = NULL;
+ }
+}
+
+void ipath_cdev_cleanup(struct cdev **cdevp,
+ struct class_device **class_devp)
+{
+ cleanup_cdev(cdevp, class_devp);
+}
+
+static struct cdev *wildcard_cdev;
+static struct class_device *wildcard_class_dev;
+
+static const dev_t dev = MKDEV(IPATH_MAJOR, 0);
+
+static int user_init(void)
+{
+ int ret;
+
+ ret = register_chrdev_region(dev, IPATH_NMINORS, IPATH_DRV_NAME);
+ if (ret < 0) {
+ printk(KERN_ERR IPATH_DRV_NAME ": Could not register "
+ "chrdev region (err %d)\n", -ret);
+ goto done;
+ }
+
+ ipath_class = class_create(THIS_MODULE, IPATH_DRV_NAME);
+ if (IS_ERR(ipath_class)) {
+ ret = PTR_ERR(ipath_class);
+ printk(KERN_ERR IPATH_DRV_NAME ": Could not create "
+ "device class (err %d)\n", -ret);
+ goto bail;
+ }
+
+ goto done;
+bail:
+ unregister_chrdev_region(dev, IPATH_NMINORS);
+done:
+ return ret;
+}
+
+static void user_cleanup(void)
+{
+ if (ipath_class) {
+ class_destroy(ipath_class);
+ ipath_class = NULL;
+ }
+
+ unregister_chrdev_region(dev, IPATH_NMINORS);
+}
+
+static atomic_t user_count = ATOMIC_INIT(0);
+static atomic_t user_setup = ATOMIC_INIT(0);
+
+int ipath_user_add(struct ipath_devdata *dd)
+{
+ char name[10];
+ int ret;
+
+ if (atomic_inc_return(&user_count) == 1) {
+ ret = user_init();
+ if (ret < 0) {
+ ipath_dev_err(dd, "Unable to set up user support: "
+ "error %d\n", -ret);
+ goto bail;
+ }
+
+ ret = ipath_sma_init();
+ if (ret < 0) {
+ ipath_dev_err(dd, "Unable to set up SMA support: "
+ "error %d\n", -ret);
+ goto bail_user;
+ }
+
+ ret = ipath_diag_init();
+ if (ret < 0) {
+ ipath_dev_err(dd, "Unable to set up diag support: "
+ "error %d\n", -ret);
+ goto bail_sma;
+ }
+
+ ret = init_cdev(0, "ipath", &ipath_file_ops, &wildcard_cdev,
+ &wildcard_class_dev);
+ if (ret < 0) {
+ ipath_dev_err(dd, "Could not create wildcard "
+ "minor: error %d\n", -ret);
+ goto bail_diag;
+ }
+
+ atomic_set(&user_setup, 1);
+ }
+
+ snprintf(name, sizeof(name), "ipath%d", dd->ipath_unit);
+
+ ret = init_cdev(dd->ipath_unit + 1, name, &ipath_file_ops,
+ &dd->cdev, &dd->class_dev);
+ if (ret < 0)
+ ipath_dev_err(dd, "Could not create user minor %d, %s\n",
+ dd->ipath_unit + 1, name);
+
+ goto bail;
+
+bail_diag:
+ ipath_diag_cleanup();
+bail_sma:
+ ipath_sma_cleanup();
+bail_user:
+ user_cleanup();
+bail:
+ return ret;
+}
+
+void ipath_user_del(struct ipath_devdata *dd)
+{
+ cleanup_cdev(&dd->cdev, &dd->class_dev);
+
+ if (atomic_dec_return(&user_count) == 0) {
+ if (atomic_read(&user_setup) == 0)
+ goto bail;
+
+ cleanup_cdev(&wildcard_cdev, &wildcard_class_dev);
+ ipath_diag_cleanup();
+ ipath_sma_cleanup();
+ user_cleanup();
+
+ atomic_set(&user_setup, 0);
+ }
+bail:
+ return;
+}
diff -r 28bb276205de -r d1da4154aae1 drivers/infiniband/hw/ipath/ipath_user_pages.c
--- /dev/null Thu Jan 1 00:00:00 1970 +0000
+++ b/drivers/infiniband/hw/ipath/ipath_user_pages.c Thu Mar 9 16:16:10 2006 -0800
@@ -0,0 +1,210 @@
+/*
+ * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/mm.h>
+#include <linux/device.h>
+
+#include "ipath_kernel.h"
+
+static void __ipath_release_user_pages(struct page **p, size_t num_pages,
+ int dirty)
+{
+ size_t i;
+
+ for (i = 0; i < num_pages; i++) {
+ ipath_cdbg(MM, "%lu/%lu put_page %p\n", (unsigned long) i,
+ (unsigned long) num_pages, p[i]);
+ if (dirty)
+ set_page_dirty_lock(p[i]);
+ put_page(p[i]);
+ }
+}
+
+/* call with current->mm->mmap_sem held */
+static int __get_user_pages(unsigned long start_page, size_t num_pages,
+ struct page **p, struct vm_area_struct **vma)
+{
+ unsigned long lock_limit;
+ size_t got;
+ int ret;
+
+#if 0
+ /*
+ * XXX - causes MPI programs to fail, haven't had time to check
+ * yet
+ */
+ if (!capable(CAP_IPC_LOCK)) {
+ ret = -EPERM;
+ goto bail;
+ }
+#endif
+
+ lock_limit = current->signal->rlim[RLIMIT_MEMLOCK].rlim_cur >>
+ PAGE_SHIFT;
+
+ if (num_pages > lock_limit) {
+ ret = -ENOMEM;
+ goto bail;
+ }
+
+ ipath_cdbg(VERBOSE, "pin %lx pages from vaddr %lx\n",
+ (unsigned long) num_pages, start_page);
+
+ for (got = 0; got < num_pages; got += ret) {
+ ret = get_user_pages(current, current->mm,
+ start_page + got * PAGE_SIZE,
+ num_pages - got, 1, 1,
+ p + got, vma);
+ if (ret < 0)
+ goto bail_release;
+ }
+
+ current->mm->locked_vm += num_pages;
+
+ ret = 0;
+ goto bail;
+
+bail_release:
+ __ipath_release_user_pages(p, got, 0);
+bail:
+ return ret;
+}
+
+/**
+ * ipath_get_user_pages - lock user pages into memory
+ * @start_page: the start page
+ * @num_pages: the number of pages
+ * @p: the output page structures
+ *
+ * This function takes a given start page (page aligned user virtual
+ * address) and pins it and the following specified number of pages. For
+ * now, num_pages is always 1, but that will probably change at some point
+ * (because caller is doing expected sends on a single virtually contiguous
+ * buffer, so we can do all pages at once).
+ */
+int ipath_get_user_pages(unsigned long start_page, size_t num_pages,
+ struct page **p)
+{
+ int ret;
+
+ down_write(¤t->mm->mmap_sem);
+
+ ret = __get_user_pages(start_page, num_pages, p, NULL);
+
+ up_write(¤t->mm->mmap_sem);
+
+ return ret;
+}
+
+/**
+ * ipath_get_user_pages_nocopy - lock a single page for I/O and mark shared
+ * @start_page: the page to lock
+ * @p: the output page structure
+ *
+ * This is similar to ipath_get_user_pages, but it's always one page, and we
+ * mark the page as locked for I/O, and shared. This is used for the user
+ * process page that contains the destination address for the rcvhdrq tail
+ * update, so we need to have the vma. If we don't do this, the page can be
+ * taken away from us on fork, even if the child never touches it, and then
+ * the user process never sees the tail register updates.
+ */
+int ipath_get_user_pages_nocopy(unsigned long page, struct page **p)
+{
+ struct vm_area_struct *vma;
+ int ret;
+
+ down_write(¤t->mm->mmap_sem);
+
+ ret = __get_user_pages(page, 1, p, &vma);
+
+ if (ret == 0)
+ vma->vm_flags |= VM_SHM | VM_LOCKED;
+
+ up_write(¤t->mm->mmap_sem);
+
+ return ret;
+}
+
+void ipath_release_user_pages(struct page **p, size_t num_pages)
+{
+ down_write(¤t->mm->mmap_sem);
+
+ __ipath_release_user_pages(p, num_pages, 1);
+
+ current->mm->locked_vm -= num_pages;
+
+ up_write(¤t->mm->mmap_sem);
+}
+
+struct ipath_user_pages_work {
+ struct work_struct work;
+ struct mm_struct *mm;
+ unsigned long num_pages;
+};
+
+static void user_pages_account(void *ptr)
+{
+ struct ipath_user_pages_work *work = ptr;
+
+ down_write(&work->mm->mmap_sem);
+ work->mm->locked_vm -= work->num_pages;
+ up_write(&work->mm->mmap_sem);
+ mmput(work->mm);
+ kfree(work);
+}
+
+void ipath_release_user_pages_on_close(struct page **p, size_t num_pages)
+{
+ struct ipath_user_pages_work *work;
+ struct mm_struct *mm;
+
+ __ipath_release_user_pages(p, num_pages, 1);
+
+ mm = get_task_mm(current);
+ if (!mm)
+ goto bail;
+
+ work = kmalloc(sizeof(*work), GFP_KERNEL);
+ if (!work)
+ goto bail_mm;
+
+ goto bail;
+
+ INIT_WORK(&work->work, user_pages_account, work);
+ work->mm = mm;
+ work->num_pages = num_pages;
+
+bail_mm:
+ mmput(mm);
+bail:
+ return;
+}
^ permalink raw reply [flat|nested] 70+ messages in thread* [PATCH 11 of 20] ipath - layering interfaces used by higher-level driver code
2006-03-10 0:35 [PATCH 0 of 20] [RFC] ipath driver - another round for review Bryan O'Sullivan
` (9 preceding siblings ...)
2006-03-10 0:35 ` [PATCH 10 of 20] ipath - support for userspace apps using core driver Bryan O'Sullivan
@ 2006-03-10 0:35 ` Bryan O'Sullivan
2006-03-10 0:35 ` [PATCH 12 of 20] ipath - infiniband header files Bryan O'Sullivan
` (9 subsequent siblings)
20 siblings, 0 replies; 70+ messages in thread
From: Bryan O'Sullivan @ 2006-03-10 0:35 UTC (permalink / raw)
To: rolandd, gregkh, akpm, davem; +Cc: linux-kernel, openib-general
These are used to implement the Infiniband protocols and the ethernet
emulation driver.
Signed-off-by: Bryan O'Sullivan <bos@pathscale.com>
diff -r d1da4154aae1 -r f0b2f6d58480 drivers/infiniband/hw/ipath/ipath_layer.c
--- /dev/null Thu Jan 1 00:00:00 1970 +0000
+++ b/drivers/infiniband/hw/ipath/ipath_layer.c Thu Mar 9 16:16:17 2006 -0800
@@ -0,0 +1,1266 @@
+/*
+ * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+/*
+ * These are the routines used by layered drivers, currently just the
+ * layered ethernet driver and verbs layer.
+ */
+
+#include <linux/io.h>
+#include <linux/pci.h>
+#include <asm/byteorder.h>
+
+#include "ipath_kernel.h"
+#include "ips_common.h"
+#include "ipath_layer.h"
+
+int ipath_layer_set_linkstate(struct ipath_devdata *dd, u8 newstate)
+{
+ u32 lstate;
+
+ switch (newstate) {
+ case IPATH_IB_LINKDOWN:
+ ipath_set_ib_lstate(dd, INFINIPATH_IBCC_LINKINITCMD_POLL <<
+ INFINIPATH_IBCC_LINKINITCMD_SHIFT);
+ /* don't wait */
+ return 0;
+
+ case IPATH_IB_LINKDOWN_SLEEP:
+ ipath_set_ib_lstate(dd, INFINIPATH_IBCC_LINKINITCMD_SLEEP <<
+ INFINIPATH_IBCC_LINKINITCMD_SHIFT);
+ /* don't wait */
+ return 0;
+
+ case IPATH_IB_LINKDOWN_DISABLE:
+ ipath_set_ib_lstate(dd, INFINIPATH_IBCC_LINKINITCMD_DISABLE <<
+ INFINIPATH_IBCC_LINKINITCMD_SHIFT);
+ /* don't wait */
+ return 0;
+
+ case IPATH_IB_LINKINIT:
+ if (dd->ipath_flags & IPATH_LINKINIT)
+ return 0;
+ ipath_set_ib_lstate(dd, INFINIPATH_IBCC_LINKCMD_INIT <<
+ INFINIPATH_IBCC_LINKCMD_SHIFT);
+ lstate = IPATH_LINKINIT;
+ break;
+
+ case IPATH_IB_LINKARM:
+ if (dd->ipath_flags & IPATH_LINKARMED)
+ return 0;
+ if (!(dd->ipath_flags & (IPATH_LINKINIT | IPATH_LINKACTIVE)))
+ return -EINVAL;
+ ipath_set_ib_lstate(dd, INFINIPATH_IBCC_LINKCMD_ARMED <<
+ INFINIPATH_IBCC_LINKCMD_SHIFT);
+ /*
+ * Since the port can transition to ACTIVE by receiving
+ * a non VL 15 packet, wait for either state.
+ */
+ lstate = IPATH_LINKARMED | IPATH_LINKACTIVE;
+ break;
+
+ case IPATH_IB_LINKACTIVE:
+ if (dd->ipath_flags & IPATH_LINKACTIVE)
+ return 0;
+ if (!(dd->ipath_flags & IPATH_LINKARMED))
+ return -EINVAL;
+ ipath_set_ib_lstate(dd, INFINIPATH_IBCC_LINKCMD_ACTIVE <<
+ INFINIPATH_IBCC_LINKCMD_SHIFT);
+ lstate = IPATH_LINKACTIVE;
+ break;
+
+ default:
+ ipath_dbg("Invalid linkstate 0x%x requested\n", newstate);
+ return -EINVAL;
+ }
+ return ipath_wait_linkstate(dd, lstate, 2000);
+}
+
+EXPORT_SYMBOL_GPL(ipath_layer_set_linkstate);
+
+/**
+ * ipath_layer_set_mtu - set the MTU
+ * @dd: the infinipath device
+ * @arg: the new MTU
+ *
+ * we can handle "any" incoming size, the issue here is whether we
+ * need to restrict our outgoing size. For now, we don't do any
+ * sanity checking on this, and we don't deal with what happens to
+ * programs that are already running when the size changes.
+ * NOTE: changing the MTU will usually cause the IBC to go back to
+ * link initialize (IPATH_IBSTATE_INIT) state...
+ */
+int ipath_layer_set_mtu(struct ipath_devdata *dd, u16 arg)
+{
+ u32 piosize;
+ int changed = 0;
+
+ /*
+ * mtu is IB data payload max. It's the largest power of 2 less
+ * than piosize (or even larger, since it only really controls the
+ * largest we can receive; we can send the max of the mtu and piosize).
+ * We check that it's one of the valid IB sizes.
+ */
+ if (arg != 256 && arg != 512 && arg != 1024 && arg != 2048 &&
+ arg != 4096) {
+ ipath_dbg("Trying to set invalid mtu %u, failing\n", arg);
+ return -EINVAL;
+ }
+ if (dd->ipath_ibmtu == arg)
+ return 0; /* same as current */
+
+ piosize = dd->ipath_ibmaxlen;
+ dd->ipath_ibmtu = arg;
+
+ if (arg >= (piosize - IPATH_PIO_MAXIBHDR)) {
+ /* Only if it's not the initial value (or reset to it) */
+ if (piosize != dd->ipath_init_ibmaxlen) {
+ dd->ipath_ibmaxlen = piosize;
+ changed = 1;
+ }
+ } else if ((arg + IPATH_PIO_MAXIBHDR) != dd->ipath_ibmaxlen) {
+ piosize = arg + IPATH_PIO_MAXIBHDR;
+ ipath_cdbg(VERBOSE, "ibmaxlen was 0x%x, setting to 0x%x (mtu 0x%x)\n",
+ dd->ipath_ibmaxlen, piosize, arg);
+ dd->ipath_ibmaxlen = piosize;
+ changed = 1;
+ }
+
+ if (changed) {
+ /*
+ * set the IBC maxpktlength to the size of our pio
+ * buffers in words
+ */
+ u64 ibc = dd->ipath_ibcctrl;
+ ibc &= ~(INFINIPATH_IBCC_MAXPKTLEN_MASK <<
+ INFINIPATH_IBCC_MAXPKTLEN_SHIFT);
+
+ piosize = piosize - 2 * sizeof(u32); /* ignore pbc */
+ dd->ipath_ibmaxlen = piosize;
+ piosize /= sizeof(u32); /* in words */
+ /*
+ * for ICRC, which we only send in diag test pkt mode, and we
+ * don't need to worry about that for mtu
+ */
+ piosize += 1;
+
+ ibc |= piosize << INFINIPATH_IBCC_MAXPKTLEN_SHIFT;
+ dd->ipath_ibcctrl = ibc;
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_ibcctrl,
+ dd->ipath_ibcctrl);
+ dd->ipath_f_tidtemplate(dd);
+ }
+ return 0;
+}
+
+EXPORT_SYMBOL_GPL(ipath_layer_set_mtu);
+
+int ipath_set_sps_lid(struct ipath_devdata *dd, u32 arg, u8 lmc)
+{
+ ipath_stats.sps_lid[dd->ipath_unit] = arg;
+ dd->ipath_lid = arg;
+ dd->ipath_lmc = lmc;
+ if (dd->ipath_layer.l_intr)
+ dd->ipath_layer.l_intr(dd->ipath_unit, IPATH_LAYER_INT_LID);
+
+ return 0;
+}
+
+EXPORT_SYMBOL_GPL(ipath_set_sps_lid);
+
+int ipath_layer_set_guid(struct ipath_devdata *dd, u64 guid)
+{
+ /* XXX - need to inform anyone who cares this just happened. */
+ dd->ipath_guid = guid;
+ return 0;
+}
+
+EXPORT_SYMBOL_GPL(ipath_layer_set_guid);
+
+u64 ipath_layer_get_guid(struct ipath_devdata *dd)
+{
+ return dd->ipath_guid;
+}
+
+EXPORT_SYMBOL_GPL(ipath_layer_get_guid);
+
+u32 ipath_layer_get_nguid(struct ipath_devdata *dd)
+{
+ return dd->ipath_nguid;
+}
+
+EXPORT_SYMBOL_GPL(ipath_layer_get_nguid);
+
+int ipath_layer_query_device(struct ipath_devdata *dd, u32 * vendor,
+ u32 * boardrev, u32 * majrev, u32 * minrev)
+{
+ *vendor = dd->ipath_vendorid;
+ *boardrev = dd->ipath_boardrev;
+ *majrev = dd->ipath_majrev;
+ *minrev = dd->ipath_minrev;
+
+ return 0;
+}
+
+EXPORT_SYMBOL_GPL(ipath_layer_query_device);
+
+u32 ipath_layer_get_flags(struct ipath_devdata *dd)
+{
+ return dd->ipath_flags;
+}
+
+EXPORT_SYMBOL_GPL(ipath_layer_get_flags);
+
+struct device *ipath_layer_get_device(struct ipath_devdata *dd)
+{
+ return &dd->pcidev->dev;
+}
+
+EXPORT_SYMBOL_GPL(ipath_layer_get_device);
+
+u16 ipath_layer_get_deviceid(struct ipath_devdata *dd)
+{
+ return dd->ipath_deviceid;
+}
+
+EXPORT_SYMBOL_GPL(ipath_layer_get_deviceid);
+
+u64 ipath_layer_get_lastibcstat(struct ipath_devdata *dd)
+{
+ return dd->ipath_lastibcstat;
+}
+
+EXPORT_SYMBOL_GPL(ipath_layer_get_lastibcstat);
+
+u32 ipath_layer_get_ibmtu(struct ipath_devdata *dd)
+{
+ return dd->ipath_ibmtu;
+}
+
+EXPORT_SYMBOL_GPL(ipath_layer_get_ibmtu);
+
+int ipath_layer_register(const int device,
+ int (*l_intr) (const int, u32),
+ int (*l_rcv) (const int, void *,
+ struct sk_buff *), u16 l_rcv_opcode,
+ int (*l_rcv_lid) (const int, void *),
+ u16 l_rcv_lid_opcode,
+ struct ipath_devdata **ddp)
+{
+ struct ipath_devdata *dd;
+ int ret;
+
+ dd = ipath_lookup(device);
+
+ if (!dd) {
+ ret = -ENODEV;
+ goto bail;
+ }
+
+ *ddp = dd;
+ if (!(dd->ipath_flags & IPATH_INITTED)) {
+ ret = -EAGAIN;
+ goto bail;
+ }
+
+ ipath_cdbg(VERBOSE, "intr %p rx %p, rx_lid %p\n", l_intr, l_rcv, l_rcv_lid);
+ if (dd->ipath_layer.l_intr || dd->ipath_layer.l_rcv) {
+ ret = -EBUSY;
+ goto bail;
+ }
+
+ if (!(*dd->ipath_statusp & IPATH_STATUS_SMA))
+ *dd->ipath_statusp |= IPATH_STATUS_OIB_SMA;
+ dd->ipath_layer.l_intr = l_intr;
+ dd->ipath_layer.l_rcv = l_rcv;
+ dd->ipath_layer.l_rcv_lid = l_rcv_lid;
+ dd->ipath_layer.l_rcv_opcode = l_rcv_opcode;
+ dd->ipath_layer.l_rcv_lid_opcode = l_rcv_lid_opcode;
+
+ ret = 0;
+bail:
+ return ret;
+}
+
+EXPORT_SYMBOL_GPL(ipath_layer_register);
+
+static void ipath_verbs_timer(unsigned long arg)
+{
+ struct ipath_devdata *dd = (struct ipath_devdata *) arg;
+
+ /*
+ * If port 0 receive packet interrupts are not available, or
+ * can be missed, poll the receive queue
+ */
+ if (dd->ipath_flags & IPATH_POLL_RX_INTR)
+ ipath_kreceive(dd);
+
+ /* Handle verbs layer timeouts. */
+ if (dd->verbs_layer.l_timer_cb)
+ dd->verbs_layer.l_timer_cb(dd->ipath_unit);
+
+ mod_timer(&dd->verbs_layer.l_timer, jiffies + 1);
+}
+
+/**
+ * ipath_verbs_register - verbs layer registration
+ * @device: the infinipath device number
+ * @l_piobufavail: callback for when PIO buffers become available
+ * @l_rcv: callback for receiving a packet
+ * @l_timer_cb: timer callback
+ * @ipath_devdata: device data structure is put here
+ */
+int ipath_verbs_register(const int device,
+ int (*l_piobufavail) (const int device),
+ void (*l_rcv) (const int device, void *rhdr,
+ void *data, u32 tlen),
+ void (*l_timer_cb) (const int device),
+ struct ipath_devdata **ddp)
+{
+ struct ipath_devdata *dd = ipath_lookup(device);
+ int ret;
+
+ if (!dd) {
+ ret = -ENODEV;
+ goto bail;
+ }
+
+ *ddp = dd;
+
+ if (!(dd->ipath_flags & IPATH_INITTED)) {
+ ret = -EAGAIN;
+ goto bail;
+ }
+
+ ipath_cdbg(VERBOSE, "piobufavail %p rx %p\n", l_piobufavail, l_rcv);
+ if (dd->verbs_layer.l_piobufavail || dd->verbs_layer.l_rcv) {
+ ret = -EBUSY;
+ goto bail;
+ }
+
+ dd->verbs_layer.l_piobufavail = l_piobufavail;
+ dd->verbs_layer.l_rcv = l_rcv;
+ dd->verbs_layer.l_timer_cb = l_timer_cb;
+ dd->verbs_layer.l_flags = 0;
+
+ ret = 0;
+bail:
+ return ret;
+}
+
+EXPORT_SYMBOL_GPL(ipath_verbs_register);
+
+int ipath_verbs_unregister(struct ipath_devdata *dd)
+{
+ *dd->ipath_statusp &= ~IPATH_STATUS_OIB_SMA;
+ dd->verbs_layer.l_piobufavail = NULL;
+ dd->verbs_layer.l_rcv = NULL;
+ dd->verbs_layer.l_timer_cb = NULL;
+ dd->verbs_layer.l_flags = 0;
+
+ return 0;
+}
+
+EXPORT_SYMBOL_GPL(ipath_verbs_unregister);
+
+int ipath_layer_open(struct ipath_devdata *dd, u32 * pktmax)
+{
+ int ret;
+ u32 intval = 0;
+
+ if (!dd->ipath_layer.l_intr || !dd->ipath_layer.l_rcv) {
+ ret = -EINVAL;
+ goto bail;
+ }
+
+ ret = ipath_setrcvhdrsize(dd, NUM_OF_EXTRA_WORDS_IN_HEADER_QUEUE);
+
+ if (ret < 0)
+ goto bail;
+
+ *pktmax = dd->ipath_ibmaxlen;
+
+ if (*dd->ipath_statusp & IPATH_STATUS_IB_READY)
+ intval |= IPATH_LAYER_INT_IF_UP;
+ if (ipath_stats.sps_lid[dd->ipath_unit])
+ intval |= IPATH_LAYER_INT_LID;
+ if (ipath_stats.sps_mlid[dd->ipath_unit])
+ intval |= IPATH_LAYER_INT_BCAST;
+ /*
+ * do this on open, in case low level is already up and
+ * just layered driver was reloaded, etc.
+ */
+ if (intval)
+ dd->ipath_layer.l_intr(dd->ipath_unit, intval);
+
+ ret = 0;
+bail:
+ return ret;
+}
+
+EXPORT_SYMBOL_GPL(ipath_layer_open);
+
+u16 ipath_layer_get_lid(struct ipath_devdata *dd)
+{
+ return dd->ipath_lid;
+}
+
+EXPORT_SYMBOL_GPL(ipath_layer_get_lid);
+
+/**
+ * ipath_layer_get_mac - get the MAC address
+ * @dd: the infinipath device
+ * @mac: the MAC is put here
+ *
+ * This is the EUID-64 OUI octets (top 3), then
+ * skip the next 2 (which should both be zero or 0xff).
+ * The returned MAC is in network order
+ * mac points to at least 6 bytes of buffer
+ * We assume that by the time the LID is set, that the GUID is as valid
+ * as it's ever going to be, rather than adding yet another status bit.
+ */
+
+int ipath_layer_get_mac(struct ipath_devdata *dd, u8 * mac)
+{
+ u8 *guid;
+
+ guid = (u8 *) &dd->ipath_guid;
+
+ mac[0] = guid[0];
+ mac[1] = guid[1];
+ mac[2] = guid[2];
+ mac[3] = guid[5];
+ mac[4] = guid[6];
+ mac[5] = guid[7];
+ if ((guid[3] || guid[4]) && !(guid[3] == 0xff && guid[4] == 0xff))
+ ipath_dbg("Warning, guid bytes 3 and 4 not 0 or 0xffff: %x %x\n",
+ guid[3], guid[4]);
+ return 0;
+}
+
+EXPORT_SYMBOL_GPL(ipath_layer_get_mac);
+
+u16 ipath_layer_get_bcast(struct ipath_devdata *dd)
+{
+ return dd->ipath_mlid;
+}
+
+EXPORT_SYMBOL_GPL(ipath_layer_get_bcast);
+
+int ipath_layer_get_num_of_dev(void)
+{
+ return ipath_count_units(NULL, NULL, NULL);
+}
+
+EXPORT_SYMBOL_GPL(ipath_layer_get_num_of_dev);
+
+u32 ipath_layer_get_cr_errpkey(struct ipath_devdata *dd)
+{
+ return ipath_read_creg32(dd, dd->ipath_cregs->cr_errpkey);
+}
+
+EXPORT_SYMBOL_GPL(ipath_layer_get_cr_errpkey);
+
+int ipath_layer_close(struct ipath_devdata *dd)
+{
+ if (!dd->ipath_layer.l_intr || !dd->ipath_layer.l_rcv) {
+ /* normal if not all chips are present */
+ ipath_cdbg(VERBOSE, "layer close without open\n");
+ } else {
+ dd->ipath_layer.l_intr = NULL;
+ dd->ipath_layer.l_rcv = NULL;
+ dd->ipath_layer.l_rcv_lid = NULL;
+ dd->ipath_layer.l_rcv_opcode = 0;
+ dd->ipath_layer.l_rcv_lid_opcode = 0;
+ }
+
+ return 0;
+}
+
+EXPORT_SYMBOL_GPL(ipath_layer_close);
+
+static inline void update_sge(struct ipath_sge_state *ss, u32 length)
+{
+ struct ipath_sge *sge = &ss->sge;
+
+ sge->vaddr += length;
+ sge->length -= length;
+ sge->sge_length -= length;
+ if (sge->sge_length == 0) {
+ if (--ss->num_sge)
+ *sge = *ss->sg_list++;
+ } else if (sge->length == 0 && sge->mr != NULL) {
+ if (++sge->n >= IPATH_SEGSZ) {
+ if (++sge->m >= sge->mr->mapsz)
+ return;
+ sge->n = 0;
+ }
+ sge->vaddr = sge->mr->map[sge->m]->segs[sge->n].vaddr;
+ sge->length = sge->mr->map[sge->m]->segs[sge->n].length;
+ }
+}
+
+#ifdef __LITTLE_ENDIAN
+static inline u32 get_upper_bits(u32 data, u32 shift)
+{
+ return data >> shift;
+}
+
+static inline u32 set_upper_bits(u32 data, u32 shift)
+{
+ return data << shift;
+}
+
+static inline u32 clear_upper_bytes(u32 data, u32 n, u32 off)
+{
+ data <<= ((sizeof(u32) - n) * BITS_PER_BYTE);
+ data >>= ((sizeof(u32) - n - off) * BITS_PER_BYTE);
+ return data;
+}
+#else
+static inline u32 get_upper_bits(u32 data, u32 shift)
+{
+ return data << shift;
+}
+
+static inline u32 set_upper_bits(u32 data, u32 shift)
+{
+ return data >> shift;
+}
+
+static inline u32 clear_upper_bytes(u32 data, u32 n, u32 off)
+{
+ data >>= ((sizeof(u32) - n) * BITS_PER_BYTE);
+ data <<= ((sizeof(u32) - n - off) * BITS_PER_BYTE);
+ return data;
+}
+#endif
+
+static inline void copy_io(u32 __iomem *piobuf,
+ struct ipath_sge_state *ss, u32 length)
+{
+ u32 extra = 0;
+ u32 data = 0;
+ u32 last;
+
+ while (1) {
+ u32 len = ss->sge.length;
+ u32 off;
+
+ BUG_ON(len == 0);
+ if (len > length)
+ len = length;
+ if (len > ss->sge.sge_length)
+ len = ss->sge.sge_length;
+ /* If the source address is not aligned, try to align it. */
+ off = (unsigned long)ss->sge.vaddr & (sizeof(u32) - 1);
+ if (off) {
+ u32 *addr = (u32 *)((unsigned long)ss->sge.vaddr &
+ ~(sizeof(u32) - 1));
+ u32 v = get_upper_bits(*addr, off * BITS_PER_BYTE);
+ u32 y;
+
+ y = sizeof(u32) - off;
+ if (len > y)
+ len = y;
+ if (len + extra >= sizeof(u32)) {
+ data |= set_upper_bits(v, extra * BITS_PER_BYTE);
+ len = sizeof(u32) - extra;
+ if (len == length) {
+ last = data;
+ break;
+ }
+ __raw_writel(data, piobuf);
+ piobuf++;
+ extra = 0;
+ data = 0;
+ } else {
+ /* Clear unused upper bytes */
+ data |= clear_upper_bytes(v, len, extra);
+ if (len == length) {
+ last = data;
+ break;
+ }
+ extra += len;
+ }
+ } else if (extra) {
+ /* Source address is aligned. */
+ u32 *addr = (u32 *) ss->sge.vaddr;
+ int shift = extra * BITS_PER_BYTE;
+ int ushift = 32 - shift;
+ u32 l = len;
+
+ while (l >= sizeof(u32)) {
+ u32 v = *addr;
+
+ data |= set_upper_bits(v, shift);
+ __raw_writel(data, piobuf);
+ data = get_upper_bits(v, ushift);
+ piobuf++;
+ addr++;
+ l -= sizeof(u32);
+ }
+ /* We still have 'extra' number of bytes leftover. */
+ if (l) {
+ u32 v = *addr;
+
+ if (l + extra >= sizeof(u32)) {
+ data |= set_upper_bits(v, shift);
+ len -= l + extra - sizeof(u32);
+ if (len == length) {
+ last = data;
+ break;
+ }
+ __raw_writel(data, piobuf);
+ piobuf++;
+ extra = 0;
+ data = 0;
+ } else {
+ /* Clear unused upper bytes */
+ data |= clear_upper_bytes(v, l, extra);
+ if (len == length) {
+ last = data;
+ break;
+ }
+ extra += l;
+ }
+ } else if (len == length) {
+ last = data;
+ break;
+ }
+ } else if (len == length) {
+ u32 w;
+
+ /* Need to round up for the last dword in the packet. */
+ w = (len + 3) >> 2;
+ __iowrite32_copy(piobuf, ss->sge.vaddr, w - 1);
+ piobuf += w - 1;
+ last = ((u32 *) ss->sge.vaddr)[w - 1];
+ break;
+ } else {
+ u32 w = len >> 2;
+
+ __iowrite32_copy(piobuf, ss->sge.vaddr, w);
+ piobuf += w;
+
+ extra = len & (sizeof(u32) - 1);
+ if (extra) {
+ u32 v = ((u32 *) ss->sge.vaddr)[w];
+
+ /* Clear unused upper bytes */
+ data = clear_upper_bytes(v, extra, 0);
+ }
+ }
+ update_sge(ss, len);
+ length -= len;
+ }
+ ipath_flush_wc(); /* must flush early everything before trigger word */
+ __raw_writel(last, piobuf);
+ ipath_flush_wc(); /* be sure trigger word is written */
+ update_sge(ss, length);
+}
+
+/**
+ * ipath_verbs_send - send a packet from the verbs layer
+ * @dd: the infinipath device
+ * @hdrwords: the number of works in the header
+ * @hdr: the packet header
+ * @len: the length of the packet in bytes
+ * @ss: the SGE to send
+ *
+ * This is like ipath_sma_send_pkt() in that we need to be able to send
+ * packets after the chip is initialized (MADs) but also like
+ * ipath_layer_send_hdr() since its used by the verbs layer.
+ */
+int ipath_verbs_send(struct ipath_devdata *dd, u32 hdrwords,
+ u32 *hdr, u32 len, struct ipath_sge_state *ss)
+{
+ u32 __iomem *piobuf;
+ u32 plen;
+
+ /* +1 is for the qword padding of pbc */
+ plen = hdrwords + ((len + 3) >> 2) + 1;
+ if (unlikely((plen << 2) > dd->ipath_ibmaxlen)) {
+ ipath_dbg("packet len 0x%x too long, failing\n", plen);
+ return -EINVAL;
+ }
+
+ /* Get a PIO buffer to use. */
+ piobuf = ipath_getpiobuf(dd, NULL);
+ if (unlikely(piobuf == NULL))
+ return -EBUSY;
+
+ /*
+ * Write len to control qword, no flags.
+ * We have to flush after the PBC for correctness on some cpus
+ * or WC buffer can be written out of order.
+ */
+ writeq(plen, piobuf);
+ ipath_flush_wc();
+ piobuf += 2;
+ if (len == 0) {
+ /*
+ * If there is just the header portion, must flush before
+ * writing last word of header for correctness, and after
+ * the last header word (trigger word).
+ */
+ __iowrite32_copy(piobuf, hdr, hdrwords - 1);
+ ipath_flush_wc();
+ __raw_writel(hdr[hdrwords - 1], piobuf + hdrwords - 1);
+ ipath_flush_wc();
+ return 0;
+ }
+
+ __iowrite32_copy(piobuf, hdr, hdrwords);
+ piobuf += hdrwords;
+
+ /* The common case is aligned and contained in one segment. */
+ if (likely(ss->num_sge == 1 && len <= ss->sge.length &&
+ !((unsigned long)ss->sge.vaddr & (sizeof(u32) - 1)))) {
+ u32 w;
+
+ /* Need to round up for the last dword in the packet. */
+ w = (len + 3) >> 2;
+ __iowrite32_copy(piobuf, ss->sge.vaddr, w - 1);
+ ipath_flush_wc(); /* must flush early everything before trigger word */
+ __raw_writel(((u32 *) ss->sge.vaddr)[w - 1], piobuf + w - 1);
+ ipath_flush_wc(); /* be sure trigger word is written */
+ update_sge(ss, len);
+ return 0;
+ }
+ copy_io(piobuf, ss, len);
+ return 0;
+}
+
+EXPORT_SYMBOL_GPL(ipath_verbs_send);
+
+int ipath_layer_snapshot_counters(struct ipath_devdata *dd, u64 *swords,
+ u64 *rwords, u64 *spkts, u64 *rpkts,
+ u64 *xmit_wait)
+{
+ if (!(dd->ipath_flags & IPATH_INITTED)) {
+ /* no hardware, freeze, etc. */
+ ipath_dbg("unit %u not usable\n", dd->ipath_unit);
+ return -EINVAL;
+ }
+ *swords = ipath_snap_cntr(dd, dd->ipath_cregs->cr_wordsendcnt);
+ *rwords = ipath_snap_cntr(dd, dd->ipath_cregs->cr_wordrcvcnt);
+ *spkts = ipath_snap_cntr(dd, dd->ipath_cregs->cr_pktsendcnt);
+ *rpkts = ipath_snap_cntr(dd, dd->ipath_cregs->cr_pktrcvcnt);
+ *xmit_wait = ipath_snap_cntr(dd, dd->ipath_cregs->cr_sendstallcnt);
+
+ return 0;
+}
+
+EXPORT_SYMBOL_GPL(ipath_layer_snapshot_counters);
+
+/**
+ * ipath_layer_get_counters - get various chip counters
+ * @dd: the infinipath device
+ * @cntrs: counters are placed here
+ *
+ * Return the counters needed by recv_pma_get_portcounters().
+ */
+int ipath_layer_get_counters(struct ipath_devdata *dd,
+ struct ipath_layer_counters *cntrs)
+{
+ if (!(dd->ipath_flags & IPATH_INITTED)) {
+ /* no hardware, freeze, etc. */
+ ipath_dbg("unit %u not usable\n", dd->ipath_unit);
+ return -EINVAL;
+ }
+ cntrs->symbol_error_counter =
+ ipath_snap_cntr(dd, dd->ipath_cregs->cr_ibsymbolerrcnt);
+ cntrs->link_error_recovery_counter =
+ ipath_snap_cntr(dd, dd->ipath_cregs->cr_iblinkerrrecovcnt);
+ cntrs->link_downed_counter =
+ ipath_snap_cntr(dd, dd->ipath_cregs->cr_iblinkdowncnt);
+ cntrs->port_rcv_errors =
+ ipath_snap_cntr(dd, dd->ipath_cregs->cr_rxdroppktcnt) +
+ ipath_snap_cntr(dd, dd->ipath_cregs->cr_rcvovflcnt) +
+ ipath_snap_cntr(dd, dd->ipath_cregs->cr_portovflcnt) +
+ ipath_snap_cntr(dd, dd->ipath_cregs->cr_errrcvflowctrlcnt) +
+ ipath_snap_cntr(dd, dd->ipath_cregs->cr_err_rlencnt) +
+ ipath_snap_cntr(dd, dd->ipath_cregs->cr_invalidrlencnt) +
+ ipath_snap_cntr(dd, dd->ipath_cregs->cr_erricrccnt) +
+ ipath_snap_cntr(dd, dd->ipath_cregs->cr_errvcrccnt) +
+ ipath_snap_cntr(dd, dd->ipath_cregs->cr_errlpcrccnt) +
+ ipath_snap_cntr(dd, dd->ipath_cregs->cr_errlinkcnt) +
+ ipath_snap_cntr(dd, dd->ipath_cregs->cr_badformatcnt);
+ cntrs->port_rcv_remphys_errors =
+ ipath_snap_cntr(dd, dd->ipath_cregs->cr_rcvebpcnt);
+ cntrs->port_xmit_discards =
+ ipath_snap_cntr(dd, dd->ipath_cregs->cr_unsupvlcnt);
+ cntrs->port_xmit_data =
+ ipath_snap_cntr(dd, dd->ipath_cregs->cr_wordsendcnt);
+ cntrs->port_rcv_data =
+ ipath_snap_cntr(dd, dd->ipath_cregs->cr_wordrcvcnt);
+ cntrs->port_xmit_packets =
+ ipath_snap_cntr(dd, dd->ipath_cregs->cr_pktsendcnt);
+ cntrs->port_rcv_packets =
+ ipath_snap_cntr(dd, dd->ipath_cregs->cr_pktrcvcnt);
+
+ return 0;
+}
+
+EXPORT_SYMBOL_GPL(ipath_layer_get_counters);
+
+int ipath_layer_want_buffer(struct ipath_devdata *dd)
+{
+ set_bit(IPATH_S_PIOINTBUFAVAIL, &dd->ipath_sendctrl);
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl,
+ dd->ipath_sendctrl);
+
+ return 0;
+}
+
+EXPORT_SYMBOL_GPL(ipath_layer_want_buffer);
+
+int ipath_layer_send_hdr(struct ipath_devdata *dd, struct ether_header *hdr)
+{
+ int ret = 0;
+ u32 __iomem *piobuf;
+ u32 plen, *uhdr;
+ size_t count;
+ u16 vlsllnh;
+
+ if (!(dd->ipath_flags & IPATH_RCVHDRSZ_SET)) {
+ ipath_dbg("send while not open\n");
+ ret = -EINVAL;
+ } else
+ if ((dd->ipath_flags & (IPATH_LINKUNK | IPATH_LINKDOWN))
+ || dd->ipath_lid == 0) {
+ /* lid check is for when sma hasn't yet configured */
+ ret = -ENETDOWN;
+ ipath_cdbg(VERBOSE, "send while not ready, mylid=%u, flags=0x%x\n",
+ dd->ipath_lid,
+ dd->ipath_flags);
+ }
+
+ vlsllnh = *((u16 *) hdr);
+ if (vlsllnh != htons(IPS_LRH_BTH)) {
+ ipath_dbg("Warning: lrh[0] wrong (%x, not %x); not sending\n",
+ vlsllnh, htons(IPS_LRH_BTH));
+ ret = -EINVAL;
+ }
+ if (ret)
+ goto done;
+
+ /* Get a PIO buffer to use. */
+ piobuf = ipath_getpiobuf(dd, NULL);
+ if (piobuf == NULL) {
+ ret = -EBUSY;
+ goto done;
+ }
+
+ plen = (sizeof(*hdr) >> 2); /* actual length */
+ ipath_cdbg(EPKT, "0x%x+1w pio %p\n", plen, piobuf);
+
+ writeq(plen+1, piobuf); /* len (+1 for pad) to pbc, no flags */
+ ipath_flush_wc();
+ piobuf += 2;
+ uhdr = (u32 *)hdr;
+ count = plen-1; /* amount we can copy before trigger word */
+ __iowrite32_copy(piobuf, uhdr, count);
+ ipath_flush_wc();
+ __raw_writel(uhdr[count], piobuf + count);
+ ipath_flush_wc(); /* ensure it's sent, now */
+
+ ipath_stats.sps_ether_spkts++; /* ether packet sent */
+
+done:
+ return ret;
+}
+
+EXPORT_SYMBOL_GPL(ipath_layer_send_hdr);
+
+int ipath_layer_set_piointbufavail_int(struct ipath_devdata *dd)
+{
+ set_bit(IPATH_S_PIOINTBUFAVAIL, &dd->ipath_sendctrl);
+
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl,
+ dd->ipath_sendctrl);
+ return 0;
+}
+
+EXPORT_SYMBOL_GPL(ipath_layer_set_piointbufavail_int);
+
+int ipath_layer_enable_timer(struct ipath_devdata *dd)
+{
+ /*
+ * HT-400 has a design flaw where the chip and kernel idea
+ * of the tail register don't always agree, and therefore we won't
+ * get an interrupt on the next packet received.
+ * If the board supports per packet receive interrupts, use it.
+ * Otherwise, the timer function periodically checks for packets
+ * to cover this case.
+ * Either way, the timer is needed for verbs layer related
+ * processing.
+ */
+ if (dd->ipath_flags & IPATH_GPIO_INTR) {
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_debugportselect,
+ 0x2074076542310ULL);
+ /* Enable GPIO bit 2 interrupt */
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_gpio_mask,
+ (u64) (1 << 2));
+ }
+
+ init_timer(&dd->verbs_layer.l_timer);
+ dd->verbs_layer.l_timer.function = ipath_verbs_timer;
+ dd->verbs_layer.l_timer.data = (unsigned long)dd;
+ dd->verbs_layer.l_timer.expires = jiffies + 1;
+ add_timer(&dd->verbs_layer.l_timer);
+
+ return 0;
+}
+
+EXPORT_SYMBOL_GPL(ipath_layer_enable_timer);
+
+int ipath_layer_disable_timer(struct ipath_devdata *dd)
+{
+ /* Disable GPIO bit 2 interrupt */
+ if (dd->ipath_flags & IPATH_GPIO_INTR)
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_gpio_mask, 0);
+
+ del_timer_sync(&dd->verbs_layer.l_timer);
+
+ return 0;
+}
+
+EXPORT_SYMBOL_GPL(ipath_layer_disable_timer);
+
+/**
+ * ipath_layer_set_verbs_flags - set the verbs layer flags
+ * @dd: the infinipath device
+ * @flags: the flags to set
+ */
+int ipath_layer_set_verbs_flags(struct ipath_devdata *dd, unsigned flags)
+{
+ int i;
+
+ dd->verbs_layer.l_flags = flags;
+
+ for (i = 0; i < atomic_read(&ipath_max); i++) {
+ struct ipath_devdata *ss = ipath_lookup(i);
+
+ if (!ss || !(ss->ipath_flags & IPATH_INITTED))
+ continue;
+ if ((flags & IPATH_VERBS_KERNEL_SMA) &&
+ !(*ss->ipath_statusp & IPATH_STATUS_SMA))
+ *ss->ipath_statusp |= IPATH_STATUS_OIB_SMA;
+ else
+ *ss->ipath_statusp &= ~IPATH_STATUS_OIB_SMA;
+ }
+
+ return 0;
+}
+
+EXPORT_SYMBOL_GPL(ipath_layer_set_verbs_flags);
+
+/**
+ * ipath_layer_get_npkeys - return the size of the PKEY table for port 0
+ * @dd: the infinipath device
+ */
+unsigned ipath_layer_get_npkeys(struct ipath_devdata *dd)
+{
+ return ARRAY_SIZE(dd->ipath_pd[0]->port_pkeys);
+}
+
+EXPORT_SYMBOL_GPL(ipath_layer_get_npkeys);
+
+/**
+ * ipath_layer_get_pkey - return the indexed PKEY from the port 0 PKEY table
+ * @dd: the infinipath device
+ * @index: the PKEY index
+ */
+unsigned ipath_layer_get_pkey(struct ipath_devdata *dd, unsigned index)
+{
+ if (index >= ARRAY_SIZE(dd->ipath_pd[0]->port_pkeys))
+ return 0;
+
+ return dd->ipath_pd[0]->port_pkeys[index];
+}
+
+EXPORT_SYMBOL_GPL(ipath_layer_get_pkey);
+
+/**
+ * ipath_layer_get_pkeys - return the PKEY table for port 0
+ * @dd: the infinipath device
+ * @pkeys: the pkey table is placed here
+ */
+int ipath_layer_get_pkeys(struct ipath_devdata *dd, u16 * pkeys)
+{
+ struct ipath_portdata *pd = dd->ipath_pd[0];
+
+ memcpy(pkeys, pd->port_pkeys, sizeof(pd->port_pkeys));
+
+ return 0;
+}
+
+EXPORT_SYMBOL_GPL(ipath_layer_get_pkeys);
+
+/**
+ * rm_pkey - decrecment the reference count for the given PKEY
+ * @dd: the infinipath device
+ * @key: the PKEY index
+ *
+ * Return true if this was the last reference and the hardware table entry
+ * needs to be changed.
+ */
+static inline int rm_pkey(struct ipath_devdata *dd, u16 key)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(dd->ipath_pkeys); i++) {
+ if (dd->ipath_pkeys[i] != key)
+ continue;
+ if (atomic_dec_and_test(&dd->ipath_pkeyrefs[i])) {
+ dd->ipath_pkeys[i] = 0;
+ return 1;
+ }
+ break;
+ }
+ return 0;
+}
+
+/**
+ * add_pkey - add the given PKEY to the hardware table
+ * @dd: the infinipath device
+ * @key: the PKEY
+ *
+ * Return an error code if unable to add the entry, zero if no change,
+ * or 1 if the hardware PKEY register needs to be updated.
+ */
+static inline int add_pkey(struct ipath_devdata *dd, u16 key)
+{
+ int i;
+ u16 lkey = key & 0x7FFF;
+ int any = 0;
+
+ if (lkey == 0x7FFF)
+ return 0;
+
+ /* Look for an empty slot or a matching PKEY. */
+ for (i = 0; i < ARRAY_SIZE(dd->ipath_pkeys); i++) {
+ if (!dd->ipath_pkeys[i]) {
+ any++;
+ continue;
+ }
+ /* If it matches exactly, try to increment the ref count */
+ if (dd->ipath_pkeys[i] == key) {
+ if (atomic_inc_return(&dd->ipath_pkeyrefs[i]) > 1)
+ return 0;
+ /* Lost the race. Look for an empty slot below. */
+ atomic_dec(&dd->ipath_pkeyrefs[i]);
+ any++;
+ }
+ /*
+ * It makes no sense to have both the limited and unlimited
+ * PKEY set at the same time since the unlimited one will
+ * disable the limited one.
+ */
+ if ((dd->ipath_pkeys[i] & 0x7FFF) == lkey)
+ return -EEXIST;
+ }
+ if (!any)
+ return -EBUSY;
+ for (i = 0; i < ARRAY_SIZE(dd->ipath_pkeys); i++) {
+ if (!dd->ipath_pkeys[i] &&
+ atomic_inc_return(&dd->ipath_pkeyrefs[i]) == 1) {
+ /* for ipathstats, etc. */
+ ipath_stats.sps_pkeys[i] = lkey;
+ dd->ipath_pkeys[i] = key;
+ return 1;
+ }
+ }
+ return -EBUSY;
+}
+
+/**
+ * ipath_layer_set_pkeys - set the PKEY table for port 0
+ * @dd: the infinipath device
+ * @pkeys: the PKEY table
+ */
+int ipath_layer_set_pkeys(struct ipath_devdata *dd, u16 * pkeys)
+{
+ struct ipath_portdata *pd;
+ int i;
+ int changed = 0;
+
+ pd = dd->ipath_pd[0];
+
+ for (i = 0; i < ARRAY_SIZE(pd->port_pkeys); i++) {
+ u16 key = pkeys[i];
+ u16 okey = pd->port_pkeys[i];
+
+ if (key == okey)
+ continue;
+ /*
+ * The value of this PKEY table entry is changing.
+ * Remove the old entry in the hardware's array of PKEYs.
+ */
+ if (okey & 0x7FFF)
+ changed |= rm_pkey(dd, okey);
+ if (key & 0x7FFF) {
+ int ret = add_pkey(dd, key);
+
+ if (ret < 0)
+ key = 0;
+ else
+ changed |= ret;
+ }
+ pd->port_pkeys[i] = key;
+ }
+ if (changed) {
+ u64 pkey;
+
+ pkey = (u64) dd->ipath_pkeys[0] |
+ ((u64) dd->ipath_pkeys[1] << 16) |
+ ((u64) dd->ipath_pkeys[2] << 32) |
+ ((u64) dd->ipath_pkeys[3] << 48);
+ ipath_cdbg(VERBOSE, "p0 new pkey reg %llx\n", (unsigned long long) pkey);
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_partitionkey,
+ pkey);
+ }
+ return 0;
+}
+
+EXPORT_SYMBOL_GPL(ipath_layer_set_pkeys);
+
+/**
+ * ipath_layer_get_linkdowndefaultstate - get the default linkdown state
+ * @dd: the infinipath device
+ *
+ * Returns zero if the default is POLL, 1 if the default is SLEEP.
+ */
+int ipath_layer_get_linkdowndefaultstate(struct ipath_devdata *dd)
+{
+ return !!(dd->ipath_ibcctrl & INFINIPATH_IBCC_LINKDOWNDEFAULTSTATE);
+}
+
+EXPORT_SYMBOL_GPL(ipath_layer_get_linkdowndefaultstate);
+
+/**
+ * ipath_layer_set_linkdowndefaultstate - set the default linkdown state
+ * @dd: the infinipath device
+ * @sleep: the new state
+ *
+ * Note that this will only take effect when the link state changes.
+ */
+int ipath_layer_set_linkdowndefaultstate(struct ipath_devdata *dd, int sleep)
+{
+ if (sleep)
+ dd->ipath_ibcctrl |= INFINIPATH_IBCC_LINKDOWNDEFAULTSTATE;
+ else
+ dd->ipath_ibcctrl &= ~INFINIPATH_IBCC_LINKDOWNDEFAULTSTATE;
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_ibcctrl, dd->ipath_ibcctrl);
+ return 0;
+}
+
+EXPORT_SYMBOL_GPL(ipath_layer_set_linkdowndefaultstate);
+
+int ipath_layer_get_phyerrthreshold(struct ipath_devdata *dd)
+{
+ return (dd->ipath_ibcctrl >> INFINIPATH_IBCC_PHYERRTHRESHOLD_SHIFT) &
+ INFINIPATH_IBCC_PHYERRTHRESHOLD_MASK;
+}
+
+EXPORT_SYMBOL_GPL(ipath_layer_get_phyerrthreshold);
+
+/**
+ * ipath_layer_set_phyerrthreshold - set the physical error threshold
+ * @dd: the infinipath device
+ * @n: the new threshold
+ *
+ * Note that this will only take effect when the link state changes.
+ */
+int ipath_layer_set_phyerrthreshold(struct ipath_devdata *dd, unsigned n)
+{
+ unsigned v;
+
+ v = (dd->ipath_ibcctrl >> INFINIPATH_IBCC_PHYERRTHRESHOLD_SHIFT) &
+ INFINIPATH_IBCC_PHYERRTHRESHOLD_MASK;
+ if (v != n) {
+ dd->ipath_ibcctrl &=
+ ~(INFINIPATH_IBCC_PHYERRTHRESHOLD_MASK <<
+ INFINIPATH_IBCC_PHYERRTHRESHOLD_SHIFT);
+ dd->ipath_ibcctrl |=
+ (u64) n << INFINIPATH_IBCC_PHYERRTHRESHOLD_SHIFT;
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_ibcctrl,
+ dd->ipath_ibcctrl);
+ }
+ return 0;
+}
+
+EXPORT_SYMBOL_GPL(ipath_layer_set_phyerrthreshold);
+
+int ipath_layer_get_overrunthreshold(struct ipath_devdata *dd)
+{
+ return (dd->ipath_ibcctrl >> INFINIPATH_IBCC_OVERRUNTHRESHOLD_SHIFT) &
+ INFINIPATH_IBCC_OVERRUNTHRESHOLD_MASK;
+}
+
+EXPORT_SYMBOL_GPL(ipath_layer_get_overrunthreshold);
+
+/**
+ * ipath_layer_set_overrunthreshold - set the overrun threshold
+ * @dd: the infinipath device
+ * @n: the new threshold
+ *
+ * Note that this will only take effect when the link state changes.
+ */
+int ipath_layer_set_overrunthreshold(struct ipath_devdata *dd, unsigned n)
+{
+ unsigned v;
+
+ v = (dd->ipath_ibcctrl >> INFINIPATH_IBCC_OVERRUNTHRESHOLD_SHIFT) &
+ INFINIPATH_IBCC_OVERRUNTHRESHOLD_MASK;
+ if (v != n) {
+ dd->ipath_ibcctrl &=
+ ~(INFINIPATH_IBCC_OVERRUNTHRESHOLD_MASK <<
+ INFINIPATH_IBCC_OVERRUNTHRESHOLD_SHIFT);
+ dd->ipath_ibcctrl |=
+ (u64) n << INFINIPATH_IBCC_OVERRUNTHRESHOLD_SHIFT;
+ ipath_write_kreg(dd, dd->ipath_kregs->kr_ibcctrl,
+ dd->ipath_ibcctrl);
+ }
+ return 0;
+}
+
+EXPORT_SYMBOL_GPL(ipath_layer_set_overrunthreshold);
+
+int ipath_layer_get_boardname(struct ipath_devdata *dd, char *name,
+ size_t namelen)
+{
+ return dd->ipath_f_get_boardname(dd, name, namelen);
+}
+EXPORT_SYMBOL_GPL(ipath_layer_get_boardname);
diff -r d1da4154aae1 -r f0b2f6d58480 drivers/infiniband/hw/ipath/ipath_layer.h
--- /dev/null Thu Jan 1 00:00:00 1970 +0000
+++ b/drivers/infiniband/hw/ipath/ipath_layer.h Thu Mar 9 16:16:17 2006 -0800
@@ -0,0 +1,183 @@
+/*
+ * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef _IPATH_LAYER_H
+#define _IPATH_LAYER_H
+
+/*
+ * This header file is for symbols shared between the infinipath driver
+ * and drivers layered upon it (such as ipath).
+ */
+
+struct sk_buff;
+struct ipath_sge_state;
+struct ipath_devdata;
+struct ether_header;
+
+struct ipath_layer_counters {
+ u64 symbol_error_counter;
+ u64 link_error_recovery_counter;
+ u64 link_downed_counter;
+ u64 port_rcv_errors;
+ u64 port_rcv_remphys_errors;
+ u64 port_xmit_discards;
+ u64 port_xmit_data;
+ u64 port_rcv_data;
+ u64 port_xmit_packets;
+ u64 port_rcv_packets;
+};
+
+/*
+ * A segment is a linear region of low physical memory.
+ * XXX Maybe we should use phys addr here and kmap()/kunmap().
+ * Used by the verbs layer.
+ */
+struct ipath_seg {
+ void *vaddr;
+ size_t length;
+};
+
+/* The number of ipath_segs that fit in a page. */
+#define IPATH_SEGSZ (PAGE_SIZE / sizeof (struct ipath_seg))
+
+struct ipath_segarray {
+ struct ipath_seg segs[IPATH_SEGSZ];
+};
+
+struct ipath_mregion {
+ u64 user_base; /* User's address for this region */
+ u64 iova; /* IB start address of this region */
+ size_t length;
+ u32 lkey;
+ u32 offset; /* offset (bytes) to start of region */
+ int access_flags;
+ u32 max_segs; /* number of ipath_segs in all the arrays */
+ u32 mapsz; /* size of the map array */
+ struct ipath_segarray *map[0]; /* the segments */
+};
+
+/*
+ * These keep track of the copy progress within a memory region.
+ * Used by the verbs layer.
+ */
+struct ipath_sge {
+ struct ipath_mregion *mr;
+ void *vaddr; /* current pointer into the segment */
+ u32 sge_length; /* length of the SGE */
+ u32 length; /* remaining length of the segment */
+ u16 m; /* current index: mr->map[m] */
+ u16 n; /* current index: mr->map[m]->segs[n] */
+};
+
+struct ipath_sge_state {
+ struct ipath_sge *sg_list; /* next SGE to be used if any */
+ struct ipath_sge sge; /* progress state for the current SGE */
+ u8 num_sge;
+};
+
+int ipath_layer_register(int device,
+ int (*l_intr)(int, u32),
+ int (*l_rcv)(int, void *,
+ struct sk_buff *),
+ u16 rcv_opcode,
+ int (*l_rcv_lid)(int, void *),
+ u16 rcv_lid_opcode,
+ struct ipath_devdata **dd);
+int ipath_verbs_register(int device,
+ int (*l_piobufavail)(int device),
+ void (*l_rcv)(int device,
+ void *rhdr, void *data,
+ u32 tlen),
+ void (*l_timer_cb)(int device),
+ struct ipath_devdata **dd);
+int ipath_verbs_unregister(struct ipath_devdata *dd);
+int ipath_layer_open(struct ipath_devdata *, u32 * pktmax);
+int ipath_layer_close(struct ipath_devdata *);
+u16 ipath_layer_get_lid(struct ipath_devdata *dd);
+int ipath_layer_get_mac(struct ipath_devdata *dd, u8 *);
+u16 ipath_layer_get_bcast(struct ipath_devdata *dd);
+int ipath_layer_get_num_of_dev(void);
+u32 ipath_layer_get_cr_errpkey(struct ipath_devdata *dd);
+int ipath_layer_set_linkstate(struct ipath_devdata *dd, u8 state);
+int ipath_layer_set_mtu(struct ipath_devdata *, u16);
+int ipath_set_sps_lid(struct ipath_devdata *, u32, u8);
+int ipath_layer_send_hdr(struct ipath_devdata *dd, struct ether_header *hdr);
+int ipath_verbs_send(struct ipath_devdata *dd, u32 hdrwords,
+ u32 * hdr, u32 len, struct ipath_sge_state *ss);
+struct copy_data_s;
+int ipath_layer_send_skb(struct ipath_devdata *dd, struct copy_data_s *cdata);
+int ipath_layer_set_piointbufavail_int(struct ipath_devdata *dd);
+int ipath_layer_get_boardname(struct ipath_devdata *dd, char *name,
+ size_t namelen);
+int ipath_layer_snapshot_counters(struct ipath_devdata *dd, u64 *swords,
+ u64 *rwords, u64 *spkts, u64 *rpkts,
+ u64 *xmit_wait);
+int ipath_layer_get_counters(struct ipath_devdata *dd,
+ struct ipath_layer_counters *cntrs);
+int ipath_layer_want_buffer(struct ipath_devdata *dd);
+int ipath_layer_set_guid(struct ipath_devdata *, u64 guid);
+u64 ipath_layer_get_guid(struct ipath_devdata *);
+u32 ipath_layer_get_nguid(struct ipath_devdata *);
+int ipath_layer_query_device(struct ipath_devdata *, u32 * vendor,
+ u32 * boardrev, u32 * majrev, u32 * minrev);
+u32 ipath_layer_get_flags(struct ipath_devdata *dd);
+struct device *ipath_layer_get_device(struct ipath_devdata *dd);
+u16 ipath_layer_get_deviceid(struct ipath_devdata *dd);
+u64 ipath_layer_get_lastibcstat(struct ipath_devdata *dd);
+u32 ipath_layer_get_ibmtu(struct ipath_devdata *dd);
+int ipath_layer_enable_timer(struct ipath_devdata *dd);
+int ipath_layer_disable_timer(struct ipath_devdata *dd);
+int ipath_layer_set_verbs_flags(struct ipath_devdata *dd, unsigned flags);
+unsigned ipath_layer_get_npkeys(struct ipath_devdata *dd);
+unsigned ipath_layer_get_pkey(struct ipath_devdata *dd, unsigned index);
+int ipath_layer_get_pkeys(struct ipath_devdata *dd, u16 * pkeys);
+int ipath_layer_set_pkeys(struct ipath_devdata *dd, u16 * pkeys);
+int ipath_layer_get_linkdowndefaultstate(struct ipath_devdata *dd);
+int ipath_layer_set_linkdowndefaultstate(struct ipath_devdata *dd, int sleep);
+int ipath_layer_get_phyerrthreshold(struct ipath_devdata *dd);
+int ipath_layer_set_phyerrthreshold(struct ipath_devdata *dd, unsigned n);
+int ipath_layer_get_overrunthreshold(struct ipath_devdata *dd);
+int ipath_layer_set_overrunthreshold(struct ipath_devdata *dd, unsigned n);
+
+/* ipath_ether interrupt values */
+#define IPATH_LAYER_INT_IF_UP 0x2
+#define IPATH_LAYER_INT_IF_DOWN 0x4
+#define IPATH_LAYER_INT_LID 0x8
+#define IPATH_LAYER_INT_SEND_CONTINUE 0x10
+#define IPATH_LAYER_INT_BCAST 0x40
+
+/* _verbs_layer.l_flags */
+#define IPATH_VERBS_KERNEL_SMA 0x1
+
+extern unsigned ipath_debug; /* debugging bit mask */
+
+#endif /* _IPATH_LAYER_H */
^ permalink raw reply [flat|nested] 70+ messages in thread* [PATCH 12 of 20] ipath - infiniband header files
2006-03-10 0:35 [PATCH 0 of 20] [RFC] ipath driver - another round for review Bryan O'Sullivan
` (10 preceding siblings ...)
2006-03-10 0:35 ` [PATCH 11 of 20] ipath - layering interfaces used by higher-level driver code Bryan O'Sullivan
@ 2006-03-10 0:35 ` Bryan O'Sullivan
2006-03-10 0:35 ` [PATCH 13 of 20] ipath - infiniband UC and UD protocol support Bryan O'Sullivan
` (8 subsequent siblings)
20 siblings, 0 replies; 70+ messages in thread
From: Bryan O'Sullivan @ 2006-03-10 0:35 UTC (permalink / raw)
To: rolandd, gregkh, akpm, davem; +Cc: linux-kernel, openib-general
Signed-off-by: Bryan O'Sullivan <bos@pathscale.com>
diff -r f0b2f6d58480 -r 3d2a9e8f845c drivers/infiniband/hw/ipath/ipath_verbs.h
--- /dev/null Thu Jan 1 00:00:00 1970 +0000
+++ b/drivers/infiniband/hw/ipath/ipath_verbs.h Thu Mar 9 16:16:24 2006 -0800
@@ -0,0 +1,684 @@
+/*
+ * Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef IPATH_VERBS_H
+#define IPATH_VERBS_H
+
+#include <linux/types.h>
+#include <linux/spinlock.h>
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <rdma/ib_pack.h>
+
+#include "ipath_layer.h"
+#include "verbs_debug.h"
+
+#define QPN_MAX (1 << 24)
+#define QPNMAP_ENTRIES (QPN_MAX / PAGE_SIZE / BITS_PER_BYTE)
+
+/*
+ * Increment this value if any changes that break userspace ABI
+ * compatibility are made.
+ */
+#define IPATH_UVERBS_ABI_VERSION 1
+
+/*
+ * Define an ib_cq_notify value that is not valid so we know when CQ
+ * notifications are armed.
+ */
+#define IB_CQ_NONE (IB_CQ_NEXT_COMP + 1)
+
+#define IB_RNR_NAK 0x20
+#define IB_NAK_PSN_ERROR 0x60
+#define IB_NAK_INVALID_REQUEST 0x61
+#define IB_NAK_REMOTE_ACCESS_ERROR 0x62
+#define IB_NAK_REMOTE_OPERATIONAL_ERROR 0x63
+#define IB_NAK_INVALID_RD_REQUEST 0x64
+
+#define IPATH_POST_SEND_OK 0x01
+#define IPATH_POST_RECV_OK 0x02
+#define IPATH_PROCESS_RECV_OK 0x04
+#define IPATH_PROCESS_SEND_OK 0x08
+
+/* IB Performance Manager status values */
+#define IB_PMA_SAMPLE_STATUS_DONE 0x00
+#define IB_PMA_SAMPLE_STATUS_STARTED 0x01
+#define IB_PMA_SAMPLE_STATUS_RUNNING 0x02
+
+/* Mandatory IB performance counter select values. */
+#define IB_PMA_PORT_XMIT_DATA __constant_htons(0x0001)
+#define IB_PMA_PORT_RCV_DATA __constant_htons(0x0002)
+#define IB_PMA_PORT_XMIT_PKTS __constant_htons(0x0003)
+#define IB_PMA_PORT_RCV_PKTS __constant_htons(0x0004)
+#define IB_PMA_PORT_XMIT_WAIT __constant_htons(0x0005)
+
+struct ib_reth {
+ __be64 vaddr;
+ __be32 rkey;
+ __be32 length;
+} __attribute__ ((packed));
+
+struct ib_atomic_eth {
+ __be64 vaddr;
+ __be32 rkey;
+ __be64 swap_data;
+ __be64 compare_data;
+} __attribute__ ((packed));
+
+struct ipath_other_headers {
+ __be32 bth[3];
+ union {
+ struct {
+ __be32 deth[2];
+ __be32 imm_data;
+ } ud;
+ struct {
+ struct ib_reth reth;
+ __be32 imm_data;
+ } rc;
+ struct {
+ __be32 aeth;
+ __be64 atomic_ack_eth;
+ } at;
+ __be32 imm_data;
+ __be32 aeth;
+ struct ib_atomic_eth atomic_eth;
+ } u;
+} __attribute__ ((packed));
+
+/*
+ * Note that UD packets with a GRH header are 8+40+12+8 = 68 bytes long
+ * (72 w/ imm_data).
+ * Only the first 56 bytes of the IB header will be in the
+ * eager header buffer. The remaining 12 or 16 bytes are in the data buffer.
+ */
+struct ipath_ib_header {
+ __be16 lrh[4];
+ union {
+ struct {
+ struct ib_grh grh;
+ struct ipath_other_headers oth;
+ } l;
+ struct ipath_other_headers oth;
+ } u;
+} __attribute__ ((packed));
+
+/*
+ * There is one struct ipath_mcast for each multicast GID.
+ * All attached QPs are then stored as a list of
+ * struct ipath_mcast_qp.
+ */
+struct ipath_mcast_qp {
+ struct list_head list;
+ struct ipath_qp *qp;
+};
+
+struct ipath_mcast {
+ struct rb_node rb_node;
+ union ib_gid mgid;
+ struct list_head qp_list;
+ wait_queue_head_t wait;
+ atomic_t refcount;
+};
+
+/* Memory region */
+struct ipath_mr {
+ struct ib_mr ibmr;
+ struct ipath_mregion mr; /* must be last */
+};
+
+/* Fast memory region */
+struct ipath_fmr {
+ struct ib_fmr ibfmr;
+ u8 page_shift;
+ struct ipath_mregion mr; /* must be last */
+};
+
+/* Protection domain */
+struct ipath_pd {
+ struct ib_pd ibpd;
+ int user; /* non-zero if created from user space */
+};
+
+/* Address Handle */
+struct ipath_ah {
+ struct ib_ah ibah;
+ struct ib_ah_attr attr;
+};
+
+/*
+ * Quick description of our CQ/QP locking scheme:
+ *
+ * We have one global lock that protects dev->cq/qp_table. Each
+ * struct ipath_cq/qp also has its own lock. An individual qp lock
+ * may be taken inside of an individual cq lock. Both cqs attached to
+ * a qp may be locked, with the send cq locked first. No other
+ * nesting should be done.
+ *
+ * Each struct ipath_cq/qp also has an atomic_t ref count. The
+ * pointer from the cq/qp_table to the struct counts as one reference.
+ * This reference also is good for access through the consumer API, so
+ * modifying the CQ/QP etc doesn't need to take another reference.
+ * Access because of a completion being polled does need a reference.
+ *
+ * Finally, each struct ipath_cq/qp has a wait_queue_head_t for the
+ * destroy function to sleep on.
+ *
+ * This means that access from the consumer API requires nothing but
+ * taking the struct's lock.
+ *
+ * Access because of a completion event should go as follows:
+ * - lock cq/qp_table and look up struct
+ * - increment ref count in struct
+ * - drop cq/qp_table lock
+ * - lock struct, do your thing, and unlock struct
+ * - decrement ref count; if zero, wake up waiters
+ *
+ * To destroy a CQ/QP, we can do the following:
+ * - lock cq/qp_table, remove pointer, unlock cq/qp_table lock
+ * - decrement ref count
+ * - wait_event until ref count is zero
+ *
+ * It is the consumer's responsibilty to make sure that no QP
+ * operations (WQE posting or state modification) are pending when the
+ * QP is destroyed. Also, the consumer must make sure that calls to
+ * qp_modify are serialized.
+ *
+ * Possible optimizations (wait for profile data to see if/where we
+ * have locks bouncing between CPUs):
+ * - split cq/qp table lock into n separate (cache-aligned) locks,
+ * indexed (say) by the page in the table
+ */
+
+struct ipath_cq {
+ struct ib_cq ibcq;
+ struct tasklet_struct comptask;
+ spinlock_t lock;
+ u8 notify;
+ u8 triggered;
+ u32 head; /* new records added to the head */
+ u32 tail; /* poll_cq() reads from here. */
+ struct ib_wc *queue; /* this is actually ibcq.cqe + 1 */
+};
+
+/*
+ * Send work request queue entry.
+ * The size of the sg_list is determined when the QP is created and stored
+ * in qp->s_max_sge.
+ */
+struct ipath_swqe {
+ struct ib_send_wr wr; /* don't use wr.sg_list */
+ u32 psn; /* first packet sequence number */
+ u32 lpsn; /* last packet sequence number */
+ u32 ssn; /* send sequence number */
+ u32 length; /* total length of data in sg_list */
+ struct ipath_sge sg_list[0];
+};
+
+/*
+ * Receive work request queue entry.
+ * The size of the sg_list is determined when the QP is created and stored
+ * in qp->r_max_sge.
+ */
+struct ipath_rwqe {
+ u64 wr_id;
+ u32 length; /* total length of data in sg_list */
+ u8 num_sge;
+ struct ipath_sge sg_list[0];
+};
+
+struct ipath_rq {
+ spinlock_t lock;
+ u32 head; /* new work requests posted to the head */
+ u32 tail; /* receives pull requests from here. */
+ u32 size; /* size of RWQE array */
+ u8 max_sge;
+ struct ipath_rwqe *wq; /* RWQE array */
+};
+
+struct ipath_srq {
+ struct ib_srq ibsrq;
+ struct ipath_rq rq;
+ u32 limit; /* send signal when number of RWQEs < limit */
+};
+
+/*
+ * Variables prefixed with s_ are for the requester (sender).
+ * Variables prefixed with r_ are for the responder (receiver).
+ * Variables prefixed with ack_ are for responder replies.
+ *
+ * Common variables are protected by both r_rq.lock and s_lock in that order
+ * which only happens in modify_qp() or changing the QP 'state'.
+ */
+struct ipath_qp {
+ struct ib_qp ibqp;
+ struct ipath_qp *next; /* link list for QPN hash table */
+ struct list_head piowait; /* link for wait PIO buf */
+ struct list_head timerwait; /* link for waiting for timeouts */
+ struct ib_ah_attr remote_ah_attr;
+ struct ipath_ib_header s_hdr; /* next packet header to send */
+ atomic_t refcount;
+ wait_queue_head_t wait;
+ struct tasklet_struct s_task;
+ struct ipath_sge_state *s_cur_sge;
+ struct ipath_sge_state s_sge; /* current send request data */
+ struct ipath_sge_state s_rdma_sge; /* current RDMA read send data */
+ struct ipath_sge_state r_sge; /* current receive data */
+ spinlock_t s_lock;
+ unsigned long s_flags;
+ u32 s_hdrwords; /* size of s_hdr in 32 bit words */
+ u32 s_cur_size; /* size of send packet in bytes */
+ u32 s_len; /* total length of s_sge */
+ u32 s_rdma_len; /* total length of s_rdma_sge */
+ u32 s_next_psn; /* PSN for next request */
+ u32 s_last_psn; /* last response PSN processed */
+ u32 s_psn; /* current packet sequence number */
+ u32 s_rnr_timeout; /* number of milliseconds for RNR timeout */
+ u32 s_ack_psn; /* PSN for next ACK or RDMA_READ */
+ u64 s_ack_atomic; /* data for atomic ACK */
+ u64 r_wr_id; /* ID for current receive WQE */
+ u64 r_atomic_data; /* data for last atomic op */
+ u32 r_atomic_psn; /* PSN of last atomic op */
+ u32 r_len; /* total length of r_sge */
+ u32 r_rcv_len; /* receive data len processed */
+ u32 r_psn; /* expected rcv packet sequence number */
+ u8 state; /* QP state */
+ u8 s_state; /* opcode of last packet sent */
+ u8 s_ack_state; /* opcode of packet to ACK */
+ u8 s_nak_state; /* non-zero if NAK is pending */
+ u8 r_state; /* opcode of last packet received */
+ u8 r_reuse_sge; /* for UC receive errors */
+ u8 r_sge_inx; /* current index into sg_list */
+ u8 s_max_sge; /* size of s_wq->sg_list */
+ u8 qp_access_flags;
+ u8 s_retry_cnt; /* number of times to retry */
+ u8 s_rnr_retry_cnt;
+ u8 s_min_rnr_timer;
+ u8 s_retry; /* requester retry counter */
+ u8 s_rnr_retry; /* requester RNR retry counter */
+ u8 s_pkey_index; /* PKEY index to use */
+ enum ib_mtu path_mtu;
+ atomic_t msn; /* message sequence number */
+ u32 remote_qpn;
+ u32 qkey; /* QKEY for this QP (for UD or RD) */
+ u32 s_size; /* send work queue size */
+ u32 s_head; /* new entries added here */
+ u32 s_tail; /* next entry to process */
+ u32 s_cur; /* current work queue entry */
+ u32 s_last; /* last un-ACK'ed entry */
+ u32 s_ssn; /* SSN of tail entry */
+ u32 s_lsn; /* limit sequence number (credit) */
+ struct ipath_swqe *s_wq; /* send work queue */
+ struct ipath_rq r_rq; /* receive work queue */
+};
+
+/*
+ * Bit definitions for s_flags.
+ */
+#define IPATH_S_BUSY 0
+#define IPATH_S_SIGNAL_REQ_WR 1
+
+/*
+ * Since struct ipath_swqe is not a fixed size, we can't simply index into
+ * struct ipath_qp.s_wq. This function does the array index computation.
+ */
+static inline struct ipath_swqe *get_swqe_ptr(struct ipath_qp *qp, unsigned n)
+{
+ return (struct ipath_swqe *)((char *)qp->s_wq +
+ (sizeof(struct ipath_swqe) +
+ qp->s_max_sge *
+ sizeof(struct ipath_sge)) * n);
+}
+
+/*
+ * Since struct ipath_rwqe is not a fixed size, we can't simply index into
+ * struct ipath_rq.wq. This function does the array index computation.
+ */
+static inline struct ipath_rwqe *get_rwqe_ptr(struct ipath_rq *rq, unsigned n)
+{
+ return (struct ipath_rwqe *)((char *)rq->wq +
+ (sizeof(struct ipath_rwqe) +
+ rq->max_sge * sizeof(struct ipath_sge)) *
+ n);
+}
+
+/*
+ * QPN-map pages start out as NULL, they get allocated upon
+ * first use and are never deallocated. This way,
+ * large bitmaps are not allocated unless large numbers of QPs are used.
+ */
+struct qpn_map {
+ atomic_t n_free;
+ void *page;
+};
+
+struct ipath_qp_table {
+ spinlock_t lock;
+ u32 last; /* last QP number allocated */
+ u32 max; /* size of the hash table */
+ u32 nmaps; /* size of the map table */
+ struct ipath_qp **table;
+ struct qpn_map map[QPNMAP_ENTRIES]; /* bit map of free numbers */
+};
+
+struct ipath_lkey_table {
+ spinlock_t lock;
+ u32 next; /* next unused index (speeds search) */
+ u32 gen; /* generation count */
+ u32 max; /* size of the table */
+ struct ipath_mregion **table;
+};
+
+struct ipath_opcode_stats {
+ u64 n_packets; /* number of packets */
+ u64 n_bytes; /* total number of bytes */
+};
+
+struct ipath_ibdev {
+ struct ib_device ibdev;
+ int ib_unit; /* This is the device number */
+ struct ipath_devdata *dd;
+ u16 sm_lid; /* in host order */
+ u8 sm_sl;
+ u8 mkeyprot_resv_lmc;
+ unsigned long mkey_lease_timeout; /* non-zero when timer is set */
+
+ /* The following fields are really per port. */
+ struct ipath_qp_table qp_table;
+ struct ipath_lkey_table lk_table;
+ struct list_head pending[3]; /* FIFO of QPs waiting for ACKs */
+ struct list_head piowait; /* list for wait PIO buf */
+ struct list_head rnrwait; /* list of QPs waiting for RNR timer */
+ spinlock_t pending_lock;
+ __be64 sys_image_guid; /* in network order */
+ __be64 gid_prefix; /* in network order */
+ __be64 mkey;
+ u64 ipath_sword; /* total dwords sent (sample result) */
+ u64 ipath_rword; /* total dwords received (sample result) */
+ u64 ipath_spkts; /* total packets sent (sample result) */
+ u64 ipath_rpkts; /* total packets received (sample result) */
+ u64 ipath_xmit_wait; /* # of ticks no data sent (sample result) */
+ u64 rcv_errors; /* # of packets with SW detected rcv errs */
+ u64 n_unicast_xmit; /* total unicast packets sent */
+ u64 n_unicast_rcv; /* total unicast packets received */
+ u64 n_multicast_xmit; /* total multicast packets sent */
+ u64 n_multicast_rcv; /* total multicast packets received */
+ u64 n_symbol_error_counter; /* starting count for PMA */
+ u64 n_link_error_recovery_counter; /* starting count for PMA */
+ u64 n_link_downed_counter; /* starting count for PMA */
+ u64 n_port_rcv_errors; /* starting count for PMA */
+ u64 n_port_rcv_remphys_errors; /* starting count for PMA */
+ u64 n_port_xmit_discards; /* starting count for PMA */
+ u64 n_port_xmit_data; /* starting count for PMA */
+ u64 n_port_rcv_data; /* starting count for PMA */
+ u64 n_port_xmit_packets; /* starting count for PMA */
+ u64 n_port_rcv_packets; /* starting count for PMA */
+ u32 n_pkey_violations; /* starting count for PMA */
+ u32 n_rc_resends;
+ u32 n_rc_acks;
+ u32 n_rc_qacks;
+ u32 n_seq_naks;
+ u32 n_rdma_seq;
+ u32 n_rnr_naks;
+ u32 n_other_naks;
+ u32 n_timeouts;
+ u32 n_pkt_drops;
+ u32 n_wqe_errs;
+ u32 n_rdma_dup_busy;
+ u32 n_piowait;
+ u32 n_no_piobuf;
+ u32 port_cap_flags;
+ u32 pma_sample_start;
+ u32 pma_sample_interval;
+ __be16 pma_counter_select[5];
+ u16 pma_tag;
+ u16 qkey_violations;
+ u16 mkey_violations;
+ u16 mkey_lease_period;
+ u16 pending_index; /* which pending queue is active */
+ u8 pma_sample_status;
+ u8 subnet_timeout;
+ u8 link_width_enabled;
+ struct ipath_opcode_stats opstats[128];
+};
+
+struct ipath_ucontext {
+ struct ib_ucontext ibucontext;
+};
+
+static inline struct ipath_mr *to_imr(struct ib_mr *ibmr)
+{
+ return container_of(ibmr, struct ipath_mr, ibmr);
+}
+
+static inline struct ipath_fmr *to_ifmr(struct ib_fmr *ibfmr)
+{
+ return container_of(ibfmr, struct ipath_fmr, ibfmr);
+}
+
+static inline struct ipath_pd *to_ipd(struct ib_pd *ibpd)
+{
+ return container_of(ibpd, struct ipath_pd, ibpd);
+}
+
+static inline struct ipath_ah *to_iah(struct ib_ah *ibah)
+{
+ return container_of(ibah, struct ipath_ah, ibah);
+}
+
+static inline struct ipath_cq *to_icq(struct ib_cq *ibcq)
+{
+ return container_of(ibcq, struct ipath_cq, ibcq);
+}
+
+static inline struct ipath_srq *to_isrq(struct ib_srq *ibsrq)
+{
+ return container_of(ibsrq, struct ipath_srq, ibsrq);
+}
+
+static inline struct ipath_qp *to_iqp(struct ib_qp *ibqp)
+{
+ return container_of(ibqp, struct ipath_qp, ibqp);
+}
+
+static inline struct ipath_ibdev *to_idev(struct ib_device *ibdev)
+{
+ return container_of(ibdev, struct ipath_ibdev, ibdev);
+}
+
+int ipath_process_mad(struct ib_device *ibdev,
+ int mad_flags,
+ u8 port_num,
+ struct ib_wc *in_wc,
+ struct ib_grh *in_grh,
+ struct ib_mad *in_mad, struct ib_mad *out_mad);
+
+static inline struct ipath_ucontext *to_iucontext(struct ib_ucontext
+ *ibucontext)
+{
+ return container_of(ibucontext, struct ipath_ucontext, ibucontext);
+}
+
+/*
+ * Compare the lower 24 bits of the two values.
+ * Returns an integer <, ==, or > than zero.
+ */
+static inline int ipath_cmp24(u32 a, u32 b)
+{
+ return (((int) a) - ((int) b)) << 8;
+}
+
+struct ipath_mcast *ipath_mcast_find(union ib_gid *mgid);
+
+int ipath_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid);
+
+int ipath_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid);
+
+int ipath_mcast_tree_empty(void);
+
+u32 ipath_compute_aeth(struct ipath_qp *qp);
+
+struct ipath_qp *ipath_lookup_qpn(struct ipath_qp_table *qpt, u32 qpn);
+
+struct ib_qp *ipath_create_qp(struct ib_pd *ibpd,
+ struct ib_qp_init_attr *init_attr,
+ struct ib_udata *udata);
+
+int ipath_destroy_qp(struct ib_qp *ibqp);
+
+int ipath_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask);
+
+int ipath_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask,
+ struct ib_qp_init_attr *init_attr);
+
+void ipath_free_all_qps(struct ipath_qp_table *qpt);
+
+int ipath_init_qp_table(struct ipath_ibdev *idev, int size);
+
+void ipath_sqerror_qp(struct ipath_qp *qp, struct ib_wc *wc);
+
+void ipath_error_qp(struct ipath_qp *qp);
+
+void ipath_get_credit(struct ipath_qp *qp, u32 aeth);
+
+void ipath_do_rc_send(unsigned long data);
+
+void ipath_do_uc_send(unsigned long data);
+
+void ipath_cq_enter(struct ipath_cq *cq, struct ib_wc *entry, int sig);
+
+int ipath_rkey_ok(struct ipath_ibdev *dev, struct ipath_sge_state *ss,
+ u32 len, u64 vaddr, u32 rkey, int acc);
+
+int ipath_lkey_ok(struct ipath_lkey_table *rkt, struct ipath_sge *isge,
+ struct ib_sge *sge, int acc);
+
+void ipath_copy_sge(struct ipath_sge_state *ss, void *data, u32 length);
+
+void ipath_skip_sge(struct ipath_sge_state *ss, u32 length);
+
+int ipath_post_rc_send(struct ipath_qp *qp, struct ib_send_wr *wr);
+
+void ipath_uc_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr,
+ int has_grh, void *data, u32 tlen, struct ipath_qp *qp);
+
+void ipath_rc_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr,
+ int has_grh, void *data, u32 tlen, struct ipath_qp *qp);
+
+void ipath_restart_rc(struct ipath_qp *qp, u32 psn, struct ib_wc *wc);
+
+void ipath_ud_loopback(struct ipath_qp *sqp, struct ipath_sge_state *ss,
+ u32 length, struct ib_send_wr *wr, struct ib_wc *wc);
+
+int ipath_post_ud_send(struct ipath_qp *qp, struct ib_send_wr *wr);
+
+void ipath_ud_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr,
+ int has_grh, void *data, u32 tlen, struct ipath_qp *qp);
+
+int ipath_alloc_lkey(struct ipath_lkey_table *rkt, struct ipath_mregion *mr);
+
+void ipath_free_lkey(struct ipath_lkey_table *rkt, u32 lkey);
+
+int ipath_lkey_ok(struct ipath_lkey_table *rkt, struct ipath_sge *isge,
+ struct ib_sge *sge, int acc);
+
+int ipath_rkey_ok(struct ipath_ibdev *dev, struct ipath_sge_state *ss,
+ u32 len, u64 vaddr, u32 rkey, int acc);
+
+int ipath_post_srq_receive(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
+ struct ib_recv_wr **bad_wr);
+
+struct ib_srq *ipath_create_srq(struct ib_pd *ibpd,
+ struct ib_srq_init_attr *srq_init_attr,
+ struct ib_udata *udata);
+
+int ipath_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
+ enum ib_srq_attr_mask attr_mask);
+
+int ipath_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr);
+
+int ipath_destroy_srq(struct ib_srq *ibsrq);
+
+void ipath_cq_enter(struct ipath_cq *cq, struct ib_wc *entry, int sig);
+
+int ipath_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *entry);
+
+struct ib_cq *ipath_create_cq(struct ib_device *ibdev, int entries,
+ struct ib_ucontext *context,
+ struct ib_udata *udata);
+
+int ipath_destroy_cq(struct ib_cq *ibcq);
+
+int ipath_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify notify);
+
+int ipath_resize_cq(struct ib_cq *ibcq, int cqe, struct ib_udata *udata);
+
+struct ib_mr *ipath_get_dma_mr(struct ib_pd *pd, int acc);
+
+struct ib_mr *ipath_reg_phys_mr(struct ib_pd *pd,
+ struct ib_phys_buf *buffer_list,
+ int num_phys_buf, int acc, u64 *iova_start);
+
+struct ib_mr *ipath_reg_user_mr(struct ib_pd *pd, struct ib_umem *region,
+ int mr_access_flags, struct ib_udata *udata);
+
+int ipath_dereg_mr(struct ib_mr *ibmr);
+
+struct ib_fmr *ipath_alloc_fmr(struct ib_pd *pd, int mr_access_flags,
+ struct ib_fmr_attr *fmr_attr);
+
+int ipath_map_phys_fmr(struct ib_fmr *ibfmr, u64 * page_list,
+ int list_len, u64 iova);
+
+int ipath_unmap_fmr(struct list_head *fmr_list);
+
+int ipath_dealloc_fmr(struct ib_fmr *ibfmr);
+
+void ipath_no_bufs_available(struct ipath_qp *qp, struct ipath_ibdev *dev);
+
+void ipath_insert_rnr_queue(struct ipath_qp *qp);
+
+int ipath_get_rwqe(struct ipath_qp *qp, int wr_id_only);
+
+void ipath_ruc_loopback(struct ipath_qp *sqp, struct ib_wc *wc);
+
+extern const enum ib_wc_opcode ib_ipath_wc_opcode[];
+
+extern const u8 ipath_cvt_physportstate[];
+
+extern const int ib_ipath_state_ops[];
+
+extern unsigned int ib_ipath_lkey_table_size;
+
+extern const u32 ib_ipath_rnr_table[];
+
+#endif /* IPATH_VERBS_H */
diff -r f0b2f6d58480 -r 3d2a9e8f845c drivers/infiniband/hw/ipath/verbs_debug.h
--- /dev/null Thu Jan 1 00:00:00 1970 +0000
+++ b/drivers/infiniband/hw/ipath/verbs_debug.h Thu Mar 9 16:16:24 2006 -0800
@@ -0,0 +1,102 @@
+/*
+ * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef _VERBS_DEBUG_H
+#define _VERBS_DEBUG_H
+
+/*
+ * This file contains tracing code for the ib_ipath kernel module.
+ */
+#ifndef _VERBS_DEBUGGING /* tracing enabled or not */
+#define _VERBS_DEBUGGING 1
+#endif
+
+extern unsigned ib_ipath_debug;
+
+#define _VERBS_ERROR(fmt,...) \
+ do { \
+ printk(KERN_ERR "%s: " fmt, "ib_ipath", ##__VA_ARGS__); \
+ } while(0)
+
+#define _VERBS_UNIT_ERROR(unit,fmt,...) \
+ do { \
+ printk(KERN_ERR "%s: " fmt, "ib_ipath", ##__VA_ARGS__); \
+ } while(0)
+
+#if _VERBS_DEBUGGING
+
+/*
+ * Mask values for debugging. The scheme allows us to compile out any of
+ * the debug tracing stuff, and if compiled in, to enable or disable dynamically
+ * This can be set at modprobe time also:
+ * modprobe ib_path ib_ipath_debug=3
+ */
+
+#define __VERBS_INFO 0x1 /* generic low verbosity stuff */
+#define __VERBS_DBG 0x2 /* generic debug */
+#define __VERBS_VDBG 0x4 /* verbose debug */
+#define __VERBS_SMADBG 0x8000 /* sma packet debug */
+
+#define _VERBS_INFO(fmt,...) \
+ do { \
+ if(unlikely(ib_ipath_debug&__VERBS_INFO)) \
+ printk(KERN_INFO "%s: " fmt,"ib_ipath",##__VA_ARGS__); \
+ } while(0)
+
+#define _VERBS_DBG(fmt,...) \
+ do { \
+ if(unlikely(ib_ipath_debug&__VERBS_DBG)) \
+ printk(KERN_DEBUG "%s: " fmt, __func__,##__VA_ARGS__); \
+ } while(0)
+
+#define _VERBS_VDBG(fmt,...) \
+ do { \
+ if(unlikely(ib_ipath_debug&__VERBS_VDBG)) \
+ printk(KERN_DEBUG "%s: " fmt, __func__,##__VA_ARGS__); \
+ } while(0)
+
+#define _VERBS_SMADBG(fmt,...) \
+ do { \
+ if(unlikely(ib_ipath_debug&__VERBS_SMADBG)) \
+ printk(KERN_DEBUG "%s: " fmt, __func__,##__VA_ARGS__); \
+ } while(0)
+
+#else /* ! _VERBS_DEBUGGING */
+
+#define _VERBS_INFO(fmt,...)
+#define _VERBS_DBG(fmt,...)
+#define _VERBS_VDBG(fmt,...)
+#define _VERBS_SMADBG(fmt,...)
+
+#endif /* _VERBS_DEBUGGING */
+
+#endif /* _VERBS_DEBUG_H */
^ permalink raw reply [flat|nested] 70+ messages in thread* [PATCH 13 of 20] ipath - infiniband UC and UD protocol support
2006-03-10 0:35 [PATCH 0 of 20] [RFC] ipath driver - another round for review Bryan O'Sullivan
` (11 preceding siblings ...)
2006-03-10 0:35 ` [PATCH 12 of 20] ipath - infiniband header files Bryan O'Sullivan
@ 2006-03-10 0:35 ` Bryan O'Sullivan
2006-03-10 0:35 ` [PATCH 14 of 20] ipath - infiniband RC " Bryan O'Sullivan
` (7 subsequent siblings)
20 siblings, 0 replies; 70+ messages in thread
From: Bryan O'Sullivan @ 2006-03-10 0:35 UTC (permalink / raw)
To: rolandd, gregkh, akpm, davem; +Cc: linux-kernel, openib-general
Signed-off-by: Bryan O'Sullivan <bos@pathscale.com>
diff -r 3d2a9e8f845c -r e6b07a6f5a64 drivers/infiniband/hw/ipath/ipath_uc.c
--- /dev/null Thu Jan 1 00:00:00 1970 +0000
+++ b/drivers/infiniband/hw/ipath/ipath_uc.c Thu Mar 9 16:16:31 2006 -0800
@@ -0,0 +1,625 @@
+/*
+ * Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "ipath_verbs.h"
+#include "ips_common.h"
+
+/**
+ * ipath_do_uc_send - do a send on a UC queue
+ * @data: contains a pointer to the QP to send on
+ *
+ * Process entries in the send work queue until the queue is exhausted.
+ * Only allow one CPU to send a packet per QP (tasklet).
+ * Otherwise, after we drop the QP lock, two threads could send
+ * packets out of order.
+ * This is similar to ipath_do_rc_send() below except we don't have
+ * timeouts or resends.
+ */
+void ipath_do_uc_send(unsigned long data)
+{
+ struct ipath_qp *qp = (struct ipath_qp *)data;
+ struct ipath_ibdev *dev = to_idev(qp->ibqp.device);
+ struct ipath_swqe *wqe;
+ unsigned long flags;
+ u16 lrh0;
+ u32 hwords;
+ u32 nwords;
+ u32 extra_bytes;
+ u32 bth0;
+ u32 bth2;
+ u32 pmtu = ib_mtu_enum_to_int(qp->path_mtu);
+ u32 len;
+ struct ipath_other_headers *ohdr;
+ struct ib_wc wc;
+
+ if (test_and_set_bit(IPATH_S_BUSY, &qp->s_flags))
+ return;
+
+ if (unlikely(qp->remote_ah_attr.dlid ==
+ ipath_layer_get_lid(dev->dd))) {
+ /* Pass in an uninitialized ib_wc to save stack space. */
+ ipath_ruc_loopback(qp, &wc);
+ clear_bit(IPATH_S_BUSY, &qp->s_flags);
+ return;
+ }
+
+ ohdr = &qp->s_hdr.u.oth;
+ if (qp->remote_ah_attr.ah_flags & IB_AH_GRH)
+ ohdr = &qp->s_hdr.u.l.oth;
+
+again:
+ /* Check for a constructed packet to be sent. */
+ if (qp->s_hdrwords != 0) {
+ /*
+ * If no PIO bufs are available, return.
+ * An interrupt will call ipath_ib_piobufavail()
+ * when one is available.
+ */
+ if (ipath_verbs_send(dev->dd, qp->s_hdrwords,
+ (u32 *) &qp->s_hdr,
+ qp->s_cur_size,
+ qp->s_cur_sge)) {
+ ipath_no_bufs_available(qp, dev);
+ return;
+ }
+ dev->n_unicast_xmit++;
+ /* Record that we sent the packet and s_hdr is empty. */
+ qp->s_hdrwords = 0;
+ }
+
+ lrh0 = IPS_LRH_BTH;
+ /* header size in 32-bit words LRH+BTH = (8+12)/4. */
+ hwords = 5;
+
+ /*
+ * The lock is needed to synchronize between
+ * setting qp->s_ack_state and post_send().
+ */
+ spin_lock_irqsave(&qp->s_lock, flags);
+
+ if (!(ib_ipath_state_ops[qp->state] & IPATH_PROCESS_SEND_OK))
+ goto done;
+
+ bth0 = ipath_layer_get_pkey(dev->dd, qp->s_pkey_index);
+
+ /* Send a request. */
+ wqe = get_swqe_ptr(qp, qp->s_last);
+ switch (qp->s_state) {
+ default:
+ /*
+ * Signal the completion of the last send (if there is
+ * one).
+ */
+ if (qp->s_last != qp->s_tail) {
+ if (++qp->s_last == qp->s_size)
+ qp->s_last = 0;
+ if (!test_bit(IPATH_S_SIGNAL_REQ_WR,
+ &qp->s_flags) ||
+ (wqe->wr.send_flags & IB_SEND_SIGNALED)) {
+ wc.wr_id = wqe->wr.wr_id;
+ wc.status = IB_WC_SUCCESS;
+ wc.opcode = ib_ipath_wc_opcode[wqe->wr.opcode];
+ wc.vendor_err = 0;
+ wc.byte_len = wqe->length;
+ wc.qp_num = qp->ibqp.qp_num;
+ wc.src_qp = qp->remote_qpn;
+ wc.pkey_index = 0;
+ wc.slid = qp->remote_ah_attr.dlid;
+ wc.sl = qp->remote_ah_attr.sl;
+ wc.dlid_path_bits = 0;
+ wc.port_num = 0;
+ ipath_cq_enter(to_icq(qp->ibqp.send_cq),
+ &wc, 0);
+ }
+ wqe = get_swqe_ptr(qp, qp->s_last);
+ }
+ /* Check if send work queue is empty. */
+ if (qp->s_tail == qp->s_head)
+ goto done;
+ /*
+ * Start a new request.
+ */
+ qp->s_psn = wqe->psn = qp->s_next_psn;
+ qp->s_sge.sge = wqe->sg_list[0];
+ qp->s_sge.sg_list = wqe->sg_list + 1;
+ qp->s_sge.num_sge = wqe->wr.num_sge;
+ qp->s_len = len = wqe->length;
+ switch (wqe->wr.opcode) {
+ case IB_WR_SEND:
+ case IB_WR_SEND_WITH_IMM:
+ if (len > pmtu) {
+ qp->s_state = IB_OPCODE_UC_SEND_FIRST;
+ len = pmtu;
+ break;
+ }
+ if (wqe->wr.opcode == IB_WR_SEND)
+ qp->s_state = IB_OPCODE_UC_SEND_ONLY;
+ else {
+ qp->s_state =
+ IB_OPCODE_UC_SEND_ONLY_WITH_IMMEDIATE;
+ /* Immediate data comes after the BTH */
+ ohdr->u.imm_data = wqe->wr.imm_data;
+ hwords += 1;
+ }
+ if (wqe->wr.send_flags & IB_SEND_SOLICITED)
+ bth0 |= 1 << 23;
+ break;
+
+ case IB_WR_RDMA_WRITE:
+ case IB_WR_RDMA_WRITE_WITH_IMM:
+ ohdr->u.rc.reth.vaddr =
+ cpu_to_be64(wqe->wr.wr.rdma.remote_addr);
+ ohdr->u.rc.reth.rkey =
+ cpu_to_be32(wqe->wr.wr.rdma.rkey);
+ ohdr->u.rc.reth.length = cpu_to_be32(len);
+ hwords += sizeof(struct ib_reth) / 4;
+ if (len > pmtu) {
+ qp->s_state = IB_OPCODE_UC_RDMA_WRITE_FIRST;
+ len = pmtu;
+ break;
+ }
+ if (wqe->wr.opcode == IB_WR_RDMA_WRITE)
+ qp->s_state = IB_OPCODE_UC_RDMA_WRITE_ONLY;
+ else {
+ qp->s_state =
+ IB_OPCODE_UC_RDMA_WRITE_ONLY_WITH_IMMEDIATE;
+ /* Immediate data comes after the RETH */
+ ohdr->u.rc.imm_data = wqe->wr.imm_data;
+ hwords += 1;
+ if (wqe->wr.send_flags & IB_SEND_SOLICITED)
+ bth0 |= 1 << 23;
+ }
+ break;
+
+ default:
+ goto done;
+ }
+ if (++qp->s_tail >= qp->s_size)
+ qp->s_tail = 0;
+ break;
+
+ case IB_OPCODE_UC_SEND_FIRST:
+ qp->s_state = IB_OPCODE_UC_SEND_MIDDLE;
+ /* FALLTHROUGH */
+ case IB_OPCODE_UC_SEND_MIDDLE:
+ len = qp->s_len;
+ if (len > pmtu) {
+ len = pmtu;
+ break;
+ }
+ if (wqe->wr.opcode == IB_WR_SEND)
+ qp->s_state = IB_OPCODE_UC_SEND_LAST;
+ else {
+ qp->s_state = IB_OPCODE_UC_SEND_LAST_WITH_IMMEDIATE;
+ /* Immediate data comes after the BTH */
+ ohdr->u.imm_data = wqe->wr.imm_data;
+ hwords += 1;
+ }
+ if (wqe->wr.send_flags & IB_SEND_SOLICITED)
+ bth0 |= 1 << 23;
+ break;
+
+ case IB_OPCODE_UC_RDMA_WRITE_FIRST:
+ qp->s_state = IB_OPCODE_UC_RDMA_WRITE_MIDDLE;
+ /* FALLTHROUGH */
+ case IB_OPCODE_UC_RDMA_WRITE_MIDDLE:
+ len = qp->s_len;
+ if (len > pmtu) {
+ len = pmtu;
+ break;
+ }
+ if (wqe->wr.opcode == IB_WR_RDMA_WRITE)
+ qp->s_state = IB_OPCODE_UC_RDMA_WRITE_LAST;
+ else {
+ qp->s_state =
+ IB_OPCODE_UC_RDMA_WRITE_LAST_WITH_IMMEDIATE;
+ /* Immediate data comes after the BTH */
+ ohdr->u.imm_data = wqe->wr.imm_data;
+ hwords += 1;
+ if (wqe->wr.send_flags & IB_SEND_SOLICITED)
+ bth0 |= 1 << 23;
+ }
+ break;
+ }
+ bth2 = qp->s_next_psn++ & IPS_PSN_MASK;
+ qp->s_len -= len;
+ bth0 |= qp->s_state << 24;
+
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+
+ /* Construct the header. */
+ extra_bytes = (4 - len) & 3;
+ nwords = (len + extra_bytes) >> 2;
+ if (unlikely(qp->remote_ah_attr.ah_flags & IB_AH_GRH)) {
+ /* Header size in 32-bit words. */
+ hwords += 10;
+ lrh0 = IPS_LRH_GRH;
+ qp->s_hdr.u.l.grh.version_tclass_flow =
+ cpu_to_be32((6 << 28) |
+ (qp->remote_ah_attr.grh.traffic_class
+ << 20) |
+ qp->remote_ah_attr.grh.flow_label);
+ qp->s_hdr.u.l.grh.paylen =
+ cpu_to_be16(((hwords - 12) + nwords +
+ SIZE_OF_CRC) << 2);
+ /* next_hdr is defined by C8-7 in ch. 8.4.1 */
+ qp->s_hdr.u.l.grh.next_hdr = 0x1B;
+ qp->s_hdr.u.l.grh.hop_limit =
+ qp->remote_ah_attr.grh.hop_limit;
+ /* The SGID is 32-bit aligned. */
+ qp->s_hdr.u.l.grh.sgid.global.subnet_prefix =
+ dev->gid_prefix;
+ qp->s_hdr.u.l.grh.sgid.global.interface_id =
+ ipath_layer_get_guid(dev->dd);
+ qp->s_hdr.u.l.grh.dgid = qp->remote_ah_attr.grh.dgid;
+ }
+ qp->s_hdrwords = hwords;
+ qp->s_cur_sge = &qp->s_sge;
+ qp->s_cur_size = len;
+ lrh0 |= qp->remote_ah_attr.sl << 4;
+ qp->s_hdr.lrh[0] = cpu_to_be16(lrh0);
+ /* DEST LID */
+ qp->s_hdr.lrh[1] = cpu_to_be16(qp->remote_ah_attr.dlid);
+ qp->s_hdr.lrh[2] = cpu_to_be16(hwords + nwords + SIZE_OF_CRC);
+ qp->s_hdr.lrh[3] = cpu_to_be16(ipath_layer_get_lid(dev->dd));
+ bth0 |= extra_bytes << 20;
+ ohdr->bth[0] = cpu_to_be32(bth0);
+ ohdr->bth[1] = cpu_to_be32(qp->remote_qpn);
+ ohdr->bth[2] = cpu_to_be32(bth2);
+
+ /* Check for more work to do. */
+ goto again;
+
+done:
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ clear_bit(IPATH_S_BUSY, &qp->s_flags);
+}
+
+/**
+ * ipath_uc_rcv - handle an incoming UC packet
+ * @dev: the device the packet came in on
+ * @hdr: the header of the packet
+ * @has_grh: true if the packet has a GRH
+ * @data: the packet data
+ * @tlen: the length of the packet
+ * @qp: the QP for this packet.
+ *
+ * This is called from ipath_qp_rcv() to process an incoming UC packet
+ * for the given QP.
+ * Called at interrupt level.
+ */
+void ipath_uc_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr,
+ int has_grh, void *data, u32 tlen, struct ipath_qp *qp)
+{
+ struct ipath_other_headers *ohdr;
+ int opcode;
+ u32 hdrsize;
+ u32 psn;
+ u32 pad;
+ unsigned long flags;
+ struct ib_wc wc;
+ u32 pmtu = ib_mtu_enum_to_int(qp->path_mtu);
+ struct ib_reth *reth;
+
+ /* Check for GRH */
+ if (!has_grh) {
+ ohdr = &hdr->u.oth;
+ hdrsize = 8 + 12; /* LRH + BTH */
+ psn = be32_to_cpu(ohdr->bth[2]);
+ } else {
+ ohdr = &hdr->u.l.oth;
+ hdrsize = 8 + 40 + 12; /* LRH + GRH + BTH */
+ /*
+ * The header with GRH is 60 bytes and the
+ * core driver sets the eager header buffer
+ * size to 56 bytes so the last 4 bytes of
+ * the BTH header (PSN) is in the data buffer.
+ */
+ psn = be32_to_cpu(((u32 *) data)[0]);
+ data += sizeof(u32);
+ }
+ /*
+ * The opcode is in the low byte when its in network order
+ * (top byte when in host order).
+ */
+ opcode = be32_to_cpu(ohdr->bth[0]) >> 24;
+
+ wc.imm_data = 0;
+ wc.wc_flags = 0;
+
+ spin_lock_irqsave(&qp->r_rq.lock, flags);
+
+ /* Compare the PSN verses the expected PSN. */
+ if (unlikely(ipath_cmp24(psn, qp->r_psn) != 0)) {
+ /*
+ * Handle a sequence error.
+ * Silently drop any current message.
+ */
+ qp->r_psn = psn;
+ inv:
+ qp->r_state = IB_OPCODE_UC_SEND_LAST;
+ switch (opcode) {
+ case IB_OPCODE_UC_SEND_FIRST:
+ case IB_OPCODE_UC_SEND_ONLY:
+ case IB_OPCODE_UC_SEND_ONLY_WITH_IMMEDIATE:
+ goto send_first;
+
+ case IB_OPCODE_UC_RDMA_WRITE_FIRST:
+ case IB_OPCODE_UC_RDMA_WRITE_ONLY:
+ case IB_OPCODE_UC_RDMA_WRITE_ONLY_WITH_IMMEDIATE:
+ goto rdma_first;
+
+ default:
+ dev->n_pkt_drops++;
+ goto done;
+ }
+ }
+
+ /* Check for opcode sequence errors. */
+ switch (qp->r_state) {
+ case IB_OPCODE_UC_SEND_FIRST:
+ case IB_OPCODE_UC_SEND_MIDDLE:
+ if (opcode == IB_OPCODE_UC_SEND_MIDDLE ||
+ opcode == IB_OPCODE_UC_SEND_LAST ||
+ opcode == IB_OPCODE_UC_SEND_LAST_WITH_IMMEDIATE)
+ break;
+ goto inv;
+
+ case IB_OPCODE_UC_RDMA_WRITE_FIRST:
+ case IB_OPCODE_UC_RDMA_WRITE_MIDDLE:
+ if (opcode == IB_OPCODE_UC_RDMA_WRITE_MIDDLE ||
+ opcode == IB_OPCODE_UC_RDMA_WRITE_LAST ||
+ opcode == IB_OPCODE_UC_RDMA_WRITE_LAST_WITH_IMMEDIATE)
+ break;
+ goto inv;
+
+ default:
+ if (opcode == IB_OPCODE_UC_SEND_FIRST ||
+ opcode == IB_OPCODE_UC_SEND_ONLY ||
+ opcode == IB_OPCODE_UC_SEND_ONLY_WITH_IMMEDIATE ||
+ opcode == IB_OPCODE_UC_RDMA_WRITE_FIRST ||
+ opcode == IB_OPCODE_UC_RDMA_WRITE_ONLY ||
+ opcode == IB_OPCODE_UC_RDMA_WRITE_ONLY_WITH_IMMEDIATE)
+ break;
+ goto inv;
+ }
+
+ /* OK, process the packet. */
+ switch (opcode) {
+ case IB_OPCODE_UC_SEND_FIRST:
+ case IB_OPCODE_UC_SEND_ONLY:
+ case IB_OPCODE_UC_SEND_ONLY_WITH_IMMEDIATE:
+ send_first:
+ if (qp->r_reuse_sge) {
+ qp->r_reuse_sge = 0;
+ qp->r_sge = qp->s_rdma_sge;
+ } else if (!ipath_get_rwqe(qp, 0)) {
+ dev->n_pkt_drops++;
+ goto done;
+ }
+ /* Save the WQE so we can reuse it in case of an error. */
+ qp->s_rdma_sge = qp->r_sge;
+ qp->r_rcv_len = 0;
+ if (opcode == IB_OPCODE_UC_SEND_ONLY)
+ goto send_last;
+ else if (opcode == IB_OPCODE_UC_SEND_ONLY_WITH_IMMEDIATE)
+ goto send_last_imm;
+ /* FALLTHROUGH */
+ case IB_OPCODE_UC_SEND_MIDDLE:
+ /* Check for invalid length PMTU or posted rwqe len. */
+ if (unlikely(tlen != (hdrsize + pmtu + 4))) {
+ qp->r_reuse_sge = 1;
+ dev->n_pkt_drops++;
+ goto done;
+ }
+ qp->r_rcv_len += pmtu;
+ if (unlikely(qp->r_rcv_len > qp->r_len)) {
+ qp->r_reuse_sge = 1;
+ dev->n_pkt_drops++;
+ goto done;
+ }
+ ipath_copy_sge(&qp->r_sge, data, pmtu);
+ break;
+
+ case IB_OPCODE_UC_SEND_LAST_WITH_IMMEDIATE:
+ send_last_imm:
+ if (has_grh) {
+ wc.imm_data = *(u32 *) data;
+ data += sizeof(u32);
+ } else {
+ /* Immediate data comes after BTH */
+ wc.imm_data = ohdr->u.imm_data;
+ }
+ hdrsize += 4;
+ wc.wc_flags = IB_WC_WITH_IMM;
+ /* FALLTHROUGH */
+ case IB_OPCODE_UC_SEND_LAST:
+ send_last:
+ /* Get the number of bytes the message was padded by. */
+ pad = (be32_to_cpu(ohdr->bth[0]) >> 20) & 3;
+ /* Check for invalid length. */
+ /* XXX LAST len should be >= 1 */
+ if (unlikely(tlen < (hdrsize + pad + 4))) {
+ qp->r_reuse_sge = 1;
+ dev->n_pkt_drops++;
+ goto done;
+ }
+ /* Don't count the CRC. */
+ tlen -= (hdrsize + pad + 4);
+ wc.byte_len = tlen + qp->r_rcv_len;
+ if (unlikely(wc.byte_len > qp->r_len)) {
+ qp->r_reuse_sge = 1;
+ dev->n_pkt_drops++;
+ goto done;
+ }
+ /* XXX Need to free SGEs */
+ last_imm:
+ ipath_copy_sge(&qp->r_sge, data, tlen);
+ wc.wr_id = qp->r_wr_id;
+ wc.status = IB_WC_SUCCESS;
+ wc.opcode = IB_WC_RECV;
+ wc.vendor_err = 0;
+ wc.qp_num = qp->ibqp.qp_num;
+ wc.src_qp = qp->remote_qpn;
+ wc.pkey_index = 0;
+ wc.slid = qp->remote_ah_attr.dlid;
+ wc.sl = qp->remote_ah_attr.sl;
+ wc.dlid_path_bits = 0;
+ wc.port_num = 0;
+ /* Signal completion event if the solicited bit is set. */
+ ipath_cq_enter(to_icq(qp->ibqp.recv_cq), &wc,
+ ohdr->bth[0] &
+ __constant_cpu_to_be32(1 << 23));
+ break;
+
+ case IB_OPCODE_UC_RDMA_WRITE_FIRST:
+ case IB_OPCODE_UC_RDMA_WRITE_ONLY:
+ case IB_OPCODE_UC_RDMA_WRITE_ONLY_WITH_IMMEDIATE: /* consume RWQE */
+ rdma_first:
+ /* RETH comes after BTH */
+ if (!has_grh)
+ reth = &ohdr->u.rc.reth;
+ else {
+ reth = (struct ib_reth *)data;
+ data += sizeof(*reth);
+ }
+ hdrsize += sizeof(*reth);
+ qp->r_len = be32_to_cpu(reth->length);
+ qp->r_rcv_len = 0;
+ if (qp->r_len != 0) {
+ u32 rkey = be32_to_cpu(reth->rkey);
+ u64 vaddr = be64_to_cpu(reth->vaddr);
+
+ /* Check rkey */
+ if (unlikely(!ipath_rkey_ok(
+ dev, &qp->r_sge, qp->r_len,
+ vaddr, rkey,
+ IB_ACCESS_REMOTE_WRITE))) {
+ dev->n_pkt_drops++;
+ goto done;
+ }
+ } else {
+ qp->r_sge.sg_list = NULL;
+ qp->r_sge.sge.mr = NULL;
+ qp->r_sge.sge.vaddr = NULL;
+ qp->r_sge.sge.length = 0;
+ qp->r_sge.sge.sge_length = 0;
+ }
+ if (unlikely(!(qp->qp_access_flags &
+ IB_ACCESS_REMOTE_WRITE))) {
+ dev->n_pkt_drops++;
+ goto done;
+ }
+ if (opcode == IB_OPCODE_UC_RDMA_WRITE_ONLY)
+ goto rdma_last;
+ else if (opcode ==
+ IB_OPCODE_UC_RDMA_WRITE_ONLY_WITH_IMMEDIATE)
+ goto rdma_last_imm;
+ /* FALLTHROUGH */
+ case IB_OPCODE_UC_RDMA_WRITE_MIDDLE:
+ /* Check for invalid length PMTU or posted rwqe len. */
+ if (unlikely(tlen != (hdrsize + pmtu + 4))) {
+ dev->n_pkt_drops++;
+ goto done;
+ }
+ qp->r_rcv_len += pmtu;
+ if (unlikely(qp->r_rcv_len > qp->r_len)) {
+ dev->n_pkt_drops++;
+ goto done;
+ }
+ ipath_copy_sge(&qp->r_sge, data, pmtu);
+ break;
+
+ case IB_OPCODE_UC_RDMA_WRITE_LAST_WITH_IMMEDIATE:
+ rdma_last_imm:
+ /* Get the number of bytes the message was padded by. */
+ pad = (be32_to_cpu(ohdr->bth[0]) >> 20) & 3;
+ /* Check for invalid length. */
+ /* XXX LAST len should be >= 1 */
+ if (unlikely(tlen < (hdrsize + pad + 4))) {
+ dev->n_pkt_drops++;
+ goto done;
+ }
+ /* Don't count the CRC. */
+ tlen -= (hdrsize + pad + 4);
+ if (unlikely(tlen + qp->r_rcv_len != qp->r_len)) {
+ dev->n_pkt_drops++;
+ goto done;
+ }
+ if (qp->r_reuse_sge) {
+ qp->r_reuse_sge = 0;
+ } else if (!ipath_get_rwqe(qp, 1)) {
+ dev->n_pkt_drops++;
+ goto done;
+ }
+ if (has_grh) {
+ wc.imm_data = *(u32 *) data;
+ data += sizeof(u32);
+ } else {
+ /* Immediate data comes after BTH */
+ wc.imm_data = ohdr->u.imm_data;
+ }
+ hdrsize += 4;
+ wc.wc_flags = IB_WC_WITH_IMM;
+ wc.byte_len = 0;
+ goto last_imm;
+
+ case IB_OPCODE_UC_RDMA_WRITE_LAST:
+ rdma_last:
+ /* Get the number of bytes the message was padded by. */
+ pad = (be32_to_cpu(ohdr->bth[0]) >> 20) & 3;
+ /* Check for invalid length. */
+ /* XXX LAST len should be >= 1 */
+ if (unlikely(tlen < (hdrsize + pad + 4))) {
+ dev->n_pkt_drops++;
+ goto done;
+ }
+ /* Don't count the CRC. */
+ tlen -= (hdrsize + pad + 4);
+ if (unlikely(tlen + qp->r_rcv_len != qp->r_len)) {
+ dev->n_pkt_drops++;
+ goto done;
+ }
+ ipath_copy_sge(&qp->r_sge, data, tlen);
+ break;
+
+ default:
+ /* Drop packet for unknown opcodes. */
+ spin_unlock_irqrestore(&qp->r_rq.lock, flags);
+ dev->n_pkt_drops++;
+ return;
+ }
+ qp->r_psn++;
+ qp->r_state = opcode;
+done:
+ spin_unlock_irqrestore(&qp->r_rq.lock, flags);
+}
diff -r 3d2a9e8f845c -r e6b07a6f5a64 drivers/infiniband/hw/ipath/ipath_ud.c
--- /dev/null Thu Jan 1 00:00:00 1970 +0000
+++ b/drivers/infiniband/hw/ipath/ipath_ud.c Thu Mar 9 16:16:31 2006 -0800
@@ -0,0 +1,581 @@
+/*
+ * Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "ipath_verbs.h"
+#include "ips_common.h"
+
+/**
+ * ipath_ud_loopback - handle send on loopback QPs
+ * @sqp: the QP
+ * @ss: the SGE state
+ * @length: the length of the data to send
+ * @wr: the work request
+ * @wc: the work completion entry
+ *
+ * This is called from ipath_post_ud_send() to forward a WQE addressed
+ * to the same HCA.
+ */
+void ipath_ud_loopback(struct ipath_qp *sqp, struct ipath_sge_state *ss,
+ u32 length, struct ib_send_wr *wr, struct ib_wc *wc)
+{
+ struct ipath_ibdev *dev = to_idev(sqp->ibqp.device);
+ struct ipath_qp *qp;
+ struct ib_ah_attr *ah_attr;
+ unsigned long flags;
+ struct ipath_rq *rq;
+ struct ipath_srq *srq;
+ struct ipath_sge_state rsge;
+ struct ipath_sge *sge;
+ struct ipath_rwqe *wqe;
+
+ qp = ipath_lookup_qpn(&dev->qp_table, wr->wr.ud.remote_qpn);
+ if (!qp)
+ return;
+
+ /*
+ * Check that the qkey matches (except for QP0, see 9.6.1.4.1).
+ * Qkeys with the high order bit set mean use the
+ * qkey from the QP context instead of the WR (see 10.2.5).
+ */
+ if (unlikely(qp->ibqp.qp_num &&
+ ((int) wr->wr.ud.remote_qkey < 0
+ ? qp->qkey : wr->wr.ud.remote_qkey) != qp->qkey)) {
+ /* XXX OK to lose a count once in a while. */
+ dev->qkey_violations++;
+ dev->n_pkt_drops++;
+ goto done;
+ }
+
+ /*
+ * A GRH is expected to preceed the data even if not
+ * present on the wire.
+ */
+ wc->byte_len = length + sizeof(struct ib_grh);
+
+ if (wr->opcode == IB_WR_SEND_WITH_IMM) {
+ wc->wc_flags = IB_WC_WITH_IMM;
+ wc->imm_data = wr->imm_data;
+ } else {
+ wc->wc_flags = 0;
+ wc->imm_data = 0;
+ }
+
+ /*
+ * Get the next work request entry to find where to put the data.
+ * Note that it is safe to drop the lock after changing rq->tail
+ * since ipath_post_receive() won't fill the empty slot.
+ */
+ if (qp->ibqp.srq) {
+ srq = to_isrq(qp->ibqp.srq);
+ rq = &srq->rq;
+ } else {
+ srq = NULL;
+ rq = &qp->r_rq;
+ }
+ spin_lock_irqsave(&rq->lock, flags);
+ if (rq->tail == rq->head) {
+ spin_unlock_irqrestore(&rq->lock, flags);
+ dev->n_pkt_drops++;
+ goto done;
+ }
+ /* Silently drop packets which are too big. */
+ wqe = get_rwqe_ptr(rq, rq->tail);
+ if (wc->byte_len > wqe->length) {
+ spin_unlock_irqrestore(&rq->lock, flags);
+ dev->n_pkt_drops++;
+ goto done;
+ }
+ wc->wr_id = wqe->wr_id;
+ rsge.sge = wqe->sg_list[0];
+ rsge.sg_list = wqe->sg_list + 1;
+ rsge.num_sge = wqe->num_sge;
+ if (++rq->tail >= rq->size)
+ rq->tail = 0;
+ if (srq && srq->ibsrq.event_handler) {
+ u32 n;
+
+ if (rq->head < rq->tail)
+ n = rq->size + rq->head - rq->tail;
+ else
+ n = rq->head - rq->tail;
+ if (n < srq->limit) {
+ struct ib_event ev;
+
+ srq->limit = 0;
+ spin_unlock_irqrestore(&rq->lock, flags);
+ ev.device = qp->ibqp.device;
+ ev.element.srq = qp->ibqp.srq;
+ ev.event = IB_EVENT_SRQ_LIMIT_REACHED;
+ srq->ibsrq.event_handler(&ev,
+ srq->ibsrq.srq_context);
+ } else
+ spin_unlock_irqrestore(&rq->lock, flags);
+ } else
+ spin_unlock_irqrestore(&rq->lock, flags);
+ ah_attr = &to_iah(wr->wr.ud.ah)->attr;
+ if (ah_attr->ah_flags & IB_AH_GRH) {
+ ipath_copy_sge(&rsge, &ah_attr->grh, sizeof(struct ib_grh));
+ wc->wc_flags |= IB_WC_GRH;
+ } else
+ ipath_skip_sge(&rsge, sizeof(struct ib_grh));
+ sge = &ss->sge;
+ while (length) {
+ u32 len = sge->length;
+
+ if (len > length)
+ len = length;
+ BUG_ON(len == 0);
+ ipath_copy_sge(&rsge, sge->vaddr, len);
+ sge->vaddr += len;
+ sge->length -= len;
+ sge->sge_length -= len;
+ if (sge->sge_length == 0) {
+ if (--ss->num_sge)
+ *sge = *ss->sg_list++;
+ } else if (sge->length == 0 && sge->mr != NULL) {
+ if (++sge->n >= IPATH_SEGSZ) {
+ if (++sge->m >= sge->mr->mapsz)
+ break;
+ sge->n = 0;
+ }
+ sge->vaddr =
+ sge->mr->map[sge->m]->segs[sge->n].vaddr;
+ sge->length =
+ sge->mr->map[sge->m]->segs[sge->n].length;
+ }
+ length -= len;
+ }
+ wc->status = IB_WC_SUCCESS;
+ wc->opcode = IB_WC_RECV;
+ wc->vendor_err = 0;
+ wc->qp_num = qp->ibqp.qp_num;
+ wc->src_qp = sqp->ibqp.qp_num;
+ /* XXX do we know which pkey matched? Only needed for GSI. */
+ wc->pkey_index = 0;
+ wc->slid = ipath_layer_get_lid(dev->dd) |
+ (ah_attr->src_path_bits &
+ ((1 << (dev->mkeyprot_resv_lmc & 7)) - 1));
+ wc->sl = ah_attr->sl;
+ wc->dlid_path_bits =
+ ah_attr->dlid & ((1 << (dev->mkeyprot_resv_lmc & 7)) - 1);
+ /* Signal completion event if the solicited bit is set. */
+ ipath_cq_enter(to_icq(qp->ibqp.recv_cq), wc,
+ wr->send_flags & IB_SEND_SOLICITED);
+
+done:
+ if (atomic_dec_and_test(&qp->refcount))
+ wake_up(&qp->wait);
+}
+
+/**
+ * ipath_post_ud_send - post a UD send on QP
+ * @qp: the QP
+ * @wr: the work request
+ *
+ * Note that we actually send the data as it is posted instead of putting
+ * the request into a ring buffer. If we wanted to use a ring buffer,
+ * we would need to save a reference to the destination address in the SWQE.
+ */
+int ipath_post_ud_send(struct ipath_qp *qp, struct ib_send_wr *wr)
+{
+ struct ipath_ibdev *dev = to_idev(qp->ibqp.device);
+ struct ipath_other_headers *ohdr;
+ struct ib_ah_attr *ah_attr;
+ struct ipath_sge_state ss;
+ struct ipath_sge *sg_list;
+ struct ib_wc wc;
+ u32 hwords;
+ u32 nwords;
+ u32 len;
+ u32 extra_bytes;
+ u32 bth0;
+ u16 lrh0;
+ u16 lid;
+ int i;
+
+ if (!(ib_ipath_state_ops[qp->state] & IPATH_PROCESS_SEND_OK))
+ return 0;
+
+ /* IB spec says that num_sge == 0 is OK. */
+ if (wr->num_sge > qp->s_max_sge)
+ return -EINVAL;
+
+ if (wr->num_sge > 1) {
+ sg_list = kmalloc((qp->s_max_sge - 1) * sizeof(*sg_list),
+ GFP_ATOMIC);
+ if (!sg_list)
+ return -ENOMEM;
+ } else
+ sg_list = NULL;
+
+ /* Check the buffer to send. */
+ ss.sg_list = sg_list;
+ ss.sge.mr = NULL;
+ ss.sge.vaddr = NULL;
+ ss.sge.length = 0;
+ ss.sge.sge_length = 0;
+ ss.num_sge = 0;
+ len = 0;
+ for (i = 0; i < wr->num_sge; i++) {
+ /* Check LKEY */
+ if (to_ipd(qp->ibqp.pd)->user && wr->sg_list[i].lkey == 0)
+ return -EINVAL;
+
+ if (wr->sg_list[i].length == 0)
+ continue;
+ if (!ipath_lkey_ok(&dev->lk_table, ss.num_sge ?
+ sg_list + ss.num_sge - 1 : &ss.sge,
+ &wr->sg_list[i], 0))
+ return -EINVAL;
+ len += wr->sg_list[i].length;
+ ss.num_sge++;
+ }
+ extra_bytes = (4 - len) & 3;
+ nwords = (len + extra_bytes) >> 2;
+
+ /* Construct the header. */
+ ah_attr = &to_iah(wr->wr.ud.ah)->attr;
+ if (ah_attr->dlid == 0)
+ return -EINVAL;
+ if (ah_attr->dlid >= IPS_MULTICAST_LID_BASE) {
+ if (ah_attr->dlid != IPS_PERMISSIVE_LID)
+ dev->n_multicast_xmit++;
+ else
+ dev->n_unicast_xmit++;
+ } else {
+ dev->n_unicast_xmit++;
+ lid = ah_attr->dlid &
+ ~((1 << (dev->mkeyprot_resv_lmc & 7)) - 1);
+ if (unlikely(lid == ipath_layer_get_lid(dev->dd))) {
+ /*
+ * Pass in an uninitialized ib_wc to save stack
+ * space.
+ */
+ ipath_ud_loopback(qp, &ss, len, wr, &wc);
+ goto done;
+ }
+ }
+ if (ah_attr->ah_flags & IB_AH_GRH) {
+ /* Header size in 32-bit words. */
+ hwords = 17;
+ lrh0 = IPS_LRH_GRH;
+ ohdr = &qp->s_hdr.u.l.oth;
+ qp->s_hdr.u.l.grh.version_tclass_flow =
+ cpu_to_be32((6 << 28) |
+ (ah_attr->grh.traffic_class << 20) |
+ ah_attr->grh.flow_label);
+ qp->s_hdr.u.l.grh.paylen =
+ cpu_to_be16(((wr->opcode ==
+ IB_WR_SEND_WITH_IMM ? 6 : 5) +
+ nwords + SIZE_OF_CRC) << 2);
+ /* next_hdr is defined by C8-7 in ch. 8.4.1 */
+ qp->s_hdr.u.l.grh.next_hdr = 0x1B;
+ qp->s_hdr.u.l.grh.hop_limit = ah_attr->grh.hop_limit;
+ /* The SGID is 32-bit aligned. */
+ qp->s_hdr.u.l.grh.sgid.global.subnet_prefix =
+ dev->gid_prefix;
+ qp->s_hdr.u.l.grh.sgid.global.interface_id =
+ ipath_layer_get_guid(dev->dd);
+ qp->s_hdr.u.l.grh.dgid = ah_attr->grh.dgid;
+ /*
+ * Don't worry about sending to locally attached multicast
+ * QPs. It is unspecified by the spec. what happens.
+ */
+ } else {
+ /* Header size in 32-bit words. */
+ hwords = 7;
+ lrh0 = IPS_LRH_BTH;
+ ohdr = &qp->s_hdr.u.oth;
+ }
+ if (wr->opcode == IB_WR_SEND_WITH_IMM) {
+ ohdr->u.ud.imm_data = wr->imm_data;
+ wc.imm_data = wr->imm_data;
+ hwords += 1;
+ bth0 = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE << 24;
+ } else if (wr->opcode == IB_WR_SEND) {
+ wc.imm_data = 0;
+ bth0 = IB_OPCODE_UD_SEND_ONLY << 24;
+ } else
+ return -EINVAL;
+ lrh0 |= ah_attr->sl << 4;
+ if (qp->ibqp.qp_type == IB_QPT_SMI)
+ lrh0 |= 0xF000; /* Set VL (see ch. 13.5.3.1) */
+ qp->s_hdr.lrh[0] = cpu_to_be16(lrh0);
+ qp->s_hdr.lrh[1] = cpu_to_be16(ah_attr->dlid); /* DEST LID */
+ qp->s_hdr.lrh[2] = cpu_to_be16(hwords + nwords + SIZE_OF_CRC);
+ lid = ipath_layer_get_lid(dev->dd);
+ if (lid) {
+ lid |= ah_attr->src_path_bits &
+ ((1 << (dev->mkeyprot_resv_lmc & 7)) - 1);
+ qp->s_hdr.lrh[3] = cpu_to_be16(lid);
+ } else
+ qp->s_hdr.lrh[3] = IB_LID_PERMISSIVE;
+ if (wr->send_flags & IB_SEND_SOLICITED)
+ bth0 |= 1 << 23;
+ bth0 |= extra_bytes << 20;
+ bth0 |= qp->ibqp.qp_type == IB_QPT_SMI ? IPS_DEFAULT_P_KEY :
+ ipath_layer_get_pkey(dev->dd, qp->s_pkey_index);
+ ohdr->bth[0] = cpu_to_be32(bth0);
+ /*
+ * Use the multicast QP if the destination LID is a multicast LID.
+ */
+ ohdr->bth[1] = ah_attr->dlid >= IPS_MULTICAST_LID_BASE &&
+ ah_attr->dlid != IPS_PERMISSIVE_LID ?
+ __constant_cpu_to_be32(IPS_MULTICAST_QPN) :
+ cpu_to_be32(wr->wr.ud.remote_qpn);
+ /* XXX Could lose a PSN count but not worth locking */
+ ohdr->bth[2] = cpu_to_be32(qp->s_next_psn++ & IPS_PSN_MASK);
+ /*
+ * Qkeys with the high order bit set mean use the
+ * qkey from the QP context instead of the WR (see 10.2.5).
+ */
+ ohdr->u.ud.deth[0] = cpu_to_be32((int)wr->wr.ud.remote_qkey < 0 ?
+ qp->qkey : wr->wr.ud.remote_qkey);
+ ohdr->u.ud.deth[1] = cpu_to_be32(qp->ibqp.qp_num);
+ if (ipath_verbs_send(dev->dd, hwords, (u32 *) &qp->s_hdr,
+ len, &ss))
+ dev->n_no_piobuf++;
+
+done:
+ /* Queue the completion status entry. */
+ if (!test_bit(IPATH_S_SIGNAL_REQ_WR, &qp->s_flags) ||
+ (wr->send_flags & IB_SEND_SIGNALED)) {
+ wc.wr_id = wr->wr_id;
+ wc.status = IB_WC_SUCCESS;
+ wc.vendor_err = 0;
+ wc.opcode = IB_WC_SEND;
+ wc.byte_len = len;
+ wc.qp_num = qp->ibqp.qp_num;
+ wc.src_qp = 0;
+ wc.wc_flags = 0;
+ /* XXX initialize other fields? */
+ ipath_cq_enter(to_icq(qp->ibqp.send_cq), &wc, 0);
+ }
+ kfree(sg_list);
+
+ return 0;
+}
+
+/**
+ * ipath_ud_rcv - receive an incoming UD packet
+ * @dev: the device the packet came in on
+ * @hdr: the packet header
+ * @has_grh: true if the packet has a GRH
+ * @data: the packet data
+ * @tlen: the packet length
+ * @qp: the QP the packet came on
+ *
+ * This is called from ipath_qp_rcv() to process an incoming UD packet
+ * for the given QP.
+ * Called at interrupt level.
+ */
+void ipath_ud_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr,
+ int has_grh, void *data, u32 tlen, struct ipath_qp *qp)
+{
+ struct ipath_other_headers *ohdr;
+ int opcode;
+ u32 hdrsize;
+ u32 pad;
+ unsigned long flags;
+ struct ib_wc wc;
+ u32 qkey;
+ u32 src_qp;
+ struct ipath_rq *rq;
+ struct ipath_srq *srq;
+ struct ipath_rwqe *wqe;
+ u16 dlid;
+
+ /* Check for GRH */
+ if (!has_grh) {
+ ohdr = &hdr->u.oth;
+ hdrsize = 8 + 12 + 8; /* LRH + BTH + DETH */
+ qkey = be32_to_cpu(ohdr->u.ud.deth[0]);
+ src_qp = be32_to_cpu(ohdr->u.ud.deth[1]);
+ } else {
+ ohdr = &hdr->u.l.oth;
+ hdrsize = 8 + 40 + 12 + 8; /* LRH + GRH + BTH + DETH */
+ /*
+ * The header with GRH is 68 bytes and the core driver sets
+ * the eager header buffer size to 56 bytes so the last 12
+ * bytes of the IB header is in the data buffer.
+ */
+ qkey = be32_to_cpu(((u32 *) data)[1]);
+ src_qp = be32_to_cpu(((u32 *) data)[2]);
+ data += 12;
+ }
+ src_qp &= IPS_QPN_MASK;
+
+ /*
+ * Check that the permissive LID is only used on QP0
+ * and the QKEY matches (see 9.6.1.4.1 and 9.6.1.5.1).
+ */
+ if (qp->ibqp.qp_num) {
+ if (unlikely(hdr->lrh[1] == IB_LID_PERMISSIVE ||
+ hdr->lrh[3] == IB_LID_PERMISSIVE)) {
+ dev->n_pkt_drops++;
+ return;
+ }
+ if (unlikely(qkey != qp->qkey)) {
+ /* XXX OK to lose a count once in a while. */
+ dev->qkey_violations++;
+ dev->n_pkt_drops++;
+ return;
+ }
+ }
+
+ /* Get the number of bytes the message was padded by. */
+ pad = (be32_to_cpu(ohdr->bth[0]) >> 20) & 3;
+ if (unlikely(tlen < (hdrsize + pad + 4))) {
+ /* Drop incomplete packets. */
+ dev->n_pkt_drops++;
+ return;
+ }
+ tlen -= hdrsize + pad + 4;
+
+ /* Drop invalid MAD packets (see 13.5.3.1). */
+ if (unlikely((qp->ibqp.qp_num == 0 &&
+ (tlen != 256 ||
+ (be16_to_cpu(hdr->lrh[0]) >> 12) != 15)) ||
+ (qp->ibqp.qp_num == 1 &&
+ (tlen != 256 ||
+ (be16_to_cpu(hdr->lrh[0]) >> 12) == 15)))) {
+ dev->n_pkt_drops++;
+ return;
+ }
+
+ /*
+ * A GRH is expected to preceed the data even if not
+ * present on the wire.
+ */
+ wc.byte_len = tlen + sizeof(struct ib_grh);
+
+ /*
+ * The opcode is in the low byte when its in network order
+ * (top byte when in host order).
+ */
+ opcode = be32_to_cpu(ohdr->bth[0]) >> 24;
+ if (qp->ibqp.qp_num > 1 &&
+ opcode == IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE) {
+ if (has_grh) {
+ wc.imm_data = *(u32 *) data;
+ data += sizeof(u32);
+ } else
+ wc.imm_data = ohdr->u.ud.imm_data;
+ wc.wc_flags = IB_WC_WITH_IMM;
+ hdrsize += sizeof(u32);
+ } else if (opcode == IB_OPCODE_UD_SEND_ONLY) {
+ wc.imm_data = 0;
+ wc.wc_flags = 0;
+ } else {
+ dev->n_pkt_drops++;
+ return;
+ }
+
+ /*
+ * Get the next work request entry to find where to put the data.
+ * Note that it is safe to drop the lock after changing rq->tail
+ * since ipath_post_receive() won't fill the empty slot.
+ */
+ if (qp->ibqp.srq) {
+ srq = to_isrq(qp->ibqp.srq);
+ rq = &srq->rq;
+ } else {
+ srq = NULL;
+ rq = &qp->r_rq;
+ }
+ spin_lock_irqsave(&rq->lock, flags);
+ if (rq->tail == rq->head) {
+ spin_unlock_irqrestore(&rq->lock, flags);
+ dev->n_pkt_drops++;
+ return;
+ }
+ /* Silently drop packets which are too big. */
+ wqe = get_rwqe_ptr(rq, rq->tail);
+ if (wc.byte_len > wqe->length) {
+ spin_unlock_irqrestore(&rq->lock, flags);
+ dev->n_pkt_drops++;
+ return;
+ }
+ wc.wr_id = wqe->wr_id;
+ qp->r_sge.sge = wqe->sg_list[0];
+ qp->r_sge.sg_list = wqe->sg_list + 1;
+ qp->r_sge.num_sge = wqe->num_sge;
+ if (++rq->tail >= rq->size)
+ rq->tail = 0;
+ if (srq && srq->ibsrq.event_handler) {
+ u32 n;
+
+ if (rq->head < rq->tail)
+ n = rq->size + rq->head - rq->tail;
+ else
+ n = rq->head - rq->tail;
+ if (n < srq->limit) {
+ struct ib_event ev;
+
+ srq->limit = 0;
+ spin_unlock_irqrestore(&rq->lock, flags);
+ ev.device = qp->ibqp.device;
+ ev.element.srq = qp->ibqp.srq;
+ ev.event = IB_EVENT_SRQ_LIMIT_REACHED;
+ srq->ibsrq.event_handler(&ev,
+ srq->ibsrq.srq_context);
+ } else
+ spin_unlock_irqrestore(&rq->lock, flags);
+ } else
+ spin_unlock_irqrestore(&rq->lock, flags);
+ if (has_grh) {
+ ipath_copy_sge(&qp->r_sge, &hdr->u.l.grh,
+ sizeof(struct ib_grh));
+ wc.wc_flags |= IB_WC_GRH;
+ } else
+ ipath_skip_sge(&qp->r_sge, sizeof(struct ib_grh));
+ ipath_copy_sge(&qp->r_sge, data,
+ wc.byte_len - sizeof(struct ib_grh));
+ wc.status = IB_WC_SUCCESS;
+ wc.opcode = IB_WC_RECV;
+ wc.vendor_err = 0;
+ wc.qp_num = qp->ibqp.qp_num;
+ wc.src_qp = src_qp;
+ /* XXX do we know which pkey matched? Only needed for GSI. */
+ wc.pkey_index = 0;
+ wc.slid = be16_to_cpu(hdr->lrh[3]);
+ wc.sl = (be16_to_cpu(hdr->lrh[0]) >> 4) & 0xF;
+ dlid = be16_to_cpu(hdr->lrh[1]);
+ /*
+ * Save the LMC lower bits if the destination LID is a unicast LID.
+ */
+ wc.dlid_path_bits = dlid >= IPS_MULTICAST_LID_BASE ? 0 :
+ dlid & ((1 << (dev->mkeyprot_resv_lmc & 7)) - 1);
+ /* Signal completion event if the solicited bit is set. */
+ ipath_cq_enter(to_icq(qp->ibqp.recv_cq), &wc,
+ ohdr->bth[0] & __constant_cpu_to_be32(1 << 23));
+}
^ permalink raw reply [flat|nested] 70+ messages in thread* [PATCH 14 of 20] ipath - infiniband RC protocol support
2006-03-10 0:35 [PATCH 0 of 20] [RFC] ipath driver - another round for review Bryan O'Sullivan
` (12 preceding siblings ...)
2006-03-10 0:35 ` [PATCH 13 of 20] ipath - infiniband UC and UD protocol support Bryan O'Sullivan
@ 2006-03-10 0:35 ` Bryan O'Sullivan
2006-03-10 0:35 ` [PATCH 15 of 20] ipath - misc infiniband code, part 1 Bryan O'Sullivan
` (6 subsequent siblings)
20 siblings, 0 replies; 70+ messages in thread
From: Bryan O'Sullivan @ 2006-03-10 0:35 UTC (permalink / raw)
To: rolandd, gregkh, akpm, davem; +Cc: linux-kernel, openib-general
Signed-off-by: Bryan O'Sullivan <bos@pathscale.com>
diff -r e6b07a6f5a64 -r 70e3edb0d82d drivers/infiniband/hw/ipath/ipath_rc.c
--- /dev/null Thu Jan 1 00:00:00 1970 +0000
+++ b/drivers/infiniband/hw/ipath/ipath_rc.c Thu Mar 9 16:16:37 2006 -0800
@@ -0,0 +1,1753 @@
+/*
+ * Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "ipath_verbs.h"
+#include "ips_common.h"
+
+/**
+ * ipath_init_restart- initialize the qp->s_sge after a restart
+ * @qp: the QP who's SGE we're restarting
+ * @wqe: the work queue to initialize the QP's SGE from
+ *
+ * The QP s_lock should be held.
+ */
+static void ipath_init_restart(struct ipath_qp *qp, struct ipath_swqe *wqe)
+{
+ struct ipath_ibdev *dev;
+ u32 len;
+
+ len = ((qp->s_psn - wqe->psn) & IPS_PSN_MASK) *
+ ib_mtu_enum_to_int(qp->path_mtu);
+ qp->s_sge.sge = wqe->sg_list[0];
+ qp->s_sge.sg_list = wqe->sg_list + 1;
+ qp->s_sge.num_sge = wqe->wr.num_sge;
+ ipath_skip_sge(&qp->s_sge, len);
+ qp->s_len = wqe->length - len;
+ dev = to_idev(qp->ibqp.device);
+ spin_lock(&dev->pending_lock);
+ if (qp->timerwait.next == LIST_POISON1)
+ list_add_tail(&qp->timerwait,
+ &dev->pending[dev->pending_index]);
+ spin_unlock(&dev->pending_lock);
+}
+
+/**
+ * ipath_do_rc_send - perform a send on an RC QP
+ * @data: contains a pointer to the QP
+ *
+ * Process entries in the send work queue until credit or queue is
+ * exhausted. Only allow one CPU to send a packet per QP (tasklet).
+ * Otherwise, after we drop the QP s_lock, two threads could send
+ * packets out of order.
+ */
+void ipath_do_rc_send(unsigned long data)
+{
+ struct ipath_qp *qp = (struct ipath_qp *)data;
+ struct ipath_ibdev *dev = to_idev(qp->ibqp.device);
+ struct ipath_swqe *wqe;
+ struct ipath_sge_state *ss;
+ unsigned long flags;
+ u16 lrh0;
+ u32 hwords;
+ u32 nwords;
+ u32 extra_bytes;
+ u32 bth0;
+ u32 bth2;
+ u32 pmtu = ib_mtu_enum_to_int(qp->path_mtu);
+ u32 len;
+ struct ipath_other_headers *ohdr;
+ char newreq;
+
+ if (test_and_set_bit(IPATH_S_BUSY, &qp->s_flags))
+ return;
+
+ if (unlikely(qp->remote_ah_attr.dlid ==
+ ipath_layer_get_lid(dev->dd))) {
+ struct ib_wc wc;
+
+ /*
+ * Pass in an uninitialized ib_wc to be consistent with
+ * other places where ipath_ruc_loopback() is called.
+ */
+ ipath_ruc_loopback(qp, &wc);
+ clear_bit(IPATH_S_BUSY, &qp->s_flags);
+ return;
+ }
+
+ ohdr = &qp->s_hdr.u.oth;
+ if (qp->remote_ah_attr.ah_flags & IB_AH_GRH)
+ ohdr = &qp->s_hdr.u.l.oth;
+
+again:
+ /* Check for a constructed packet to be sent. */
+ if (qp->s_hdrwords != 0) {
+ /*
+ * If no PIO bufs are available, return.
+ * An interrupt will call ipath_ib_piobufavail()
+ * when one is available.
+ */
+ if (ipath_verbs_send(dev->dd, qp->s_hdrwords,
+ (u32 *) &qp->s_hdr,
+ qp->s_cur_size,
+ qp->s_cur_sge)) {
+ ipath_no_bufs_available(qp, dev);
+ return;
+ }
+ dev->n_unicast_xmit++;
+ /* Record that we sent the packet and s_hdr is empty. */
+ qp->s_hdrwords = 0;
+ }
+
+ lrh0 = IPS_LRH_BTH;
+ /* header size in 32-bit words LRH+BTH = (8+12)/4. */
+ hwords = 5;
+
+ /*
+ * The lock is needed to synchronize between
+ * setting qp->s_ack_state, resend timer, and post_send().
+ */
+ spin_lock_irqsave(&qp->s_lock, flags);
+
+ bth0 = ipath_layer_get_pkey(dev->dd, qp->s_pkey_index);
+
+ /* Sending responses has higher priority over sending requests. */
+ if (qp->s_ack_state != IB_OPCODE_RC_ACKNOWLEDGE) {
+ /*
+ * Send a response. Note that we are in the responder's
+ * side of the QP context.
+ */
+ switch (qp->s_ack_state) {
+ case IB_OPCODE_RC_RDMA_READ_REQUEST:
+ ss = &qp->s_rdma_sge;
+ len = qp->s_rdma_len;
+ if (len > pmtu) {
+ len = pmtu;
+ qp->s_ack_state =
+ IB_OPCODE_RC_RDMA_READ_RESPONSE_FIRST;
+ } else
+ qp->s_ack_state =
+ IB_OPCODE_RC_RDMA_READ_RESPONSE_ONLY;
+ qp->s_rdma_len -= len;
+ bth0 |= qp->s_ack_state << 24;
+ ohdr->u.aeth = ipath_compute_aeth(qp);
+ hwords++;
+ break;
+
+ case IB_OPCODE_RC_RDMA_READ_RESPONSE_FIRST:
+ qp->s_ack_state =
+ IB_OPCODE_RC_RDMA_READ_RESPONSE_MIDDLE;
+ /* FALLTHROUGH */
+ case IB_OPCODE_RC_RDMA_READ_RESPONSE_MIDDLE:
+ ss = &qp->s_rdma_sge;
+ len = qp->s_rdma_len;
+ if (len > pmtu)
+ len = pmtu;
+ else {
+ ohdr->u.aeth = ipath_compute_aeth(qp);
+ hwords++;
+ qp->s_ack_state =
+ IB_OPCODE_RC_RDMA_READ_RESPONSE_LAST;
+ }
+ qp->s_rdma_len -= len;
+ bth0 |= qp->s_ack_state << 24;
+ break;
+
+ case IB_OPCODE_RC_RDMA_READ_RESPONSE_LAST:
+ case IB_OPCODE_RC_RDMA_READ_RESPONSE_ONLY:
+ /*
+ * We have to prevent new requests from changing
+ * the r_sge state while a ipath_verbs_send()
+ * is in progress.
+ * Changing r_state allows the receiver
+ * to continue processing new packets.
+ * We do it here now instead of above so
+ * that we are sure the packet was sent before
+ * changing the state.
+ */
+ qp->r_state = IB_OPCODE_RC_RDMA_READ_RESPONSE_LAST;
+ qp->s_ack_state = IB_OPCODE_RC_ACKNOWLEDGE;
+ goto send_req;
+
+ case IB_OPCODE_RC_COMPARE_SWAP:
+ case IB_OPCODE_RC_FETCH_ADD:
+ ss = NULL;
+ len = 0;
+ qp->r_state = IB_OPCODE_RC_SEND_LAST;
+ qp->s_ack_state = IB_OPCODE_RC_ACKNOWLEDGE;
+ bth0 |= IB_OPCODE_ATOMIC_ACKNOWLEDGE << 24;
+ ohdr->u.at.aeth = ipath_compute_aeth(qp);
+ ohdr->u.at.atomic_ack_eth =
+ cpu_to_be64(qp->s_ack_atomic);
+ hwords += sizeof(ohdr->u.at) / 4;
+ break;
+
+ default:
+ /* Send a regular ACK. */
+ ss = NULL;
+ len = 0;
+ qp->s_ack_state = IB_OPCODE_RC_ACKNOWLEDGE;
+ bth0 |= qp->s_ack_state << 24;
+ ohdr->u.aeth = ipath_compute_aeth(qp);
+ hwords++;
+ }
+ bth2 = qp->s_ack_psn++ & IPS_PSN_MASK;
+ } else {
+ send_req:
+ if (!(ib_ipath_state_ops[qp->state] &
+ IPATH_PROCESS_SEND_OK) || qp->s_rnr_timeout)
+ goto done;
+
+ /* Send a request. */
+ wqe = get_swqe_ptr(qp, qp->s_cur);
+ switch (qp->s_state) {
+ default:
+ /*
+ * Resend an old request or start a new one.
+ *
+ * We keep track of the current SWQE so that
+ * we don't reset the "furthest progress" state
+ * if we need to back up.
+ */
+ newreq = 0;
+ if (qp->s_cur == qp->s_tail) {
+ /* Check if send work queue is empty. */
+ if (qp->s_tail == qp->s_head)
+ goto done;
+ qp->s_psn = wqe->psn = qp->s_next_psn;
+ newreq = 1;
+ }
+ /*
+ * Note that we have to be careful not to modify the
+ * original work request since we may need to resend
+ * it.
+ */
+ qp->s_sge.sge = wqe->sg_list[0];
+ qp->s_sge.sg_list = wqe->sg_list + 1;
+ qp->s_sge.num_sge = wqe->wr.num_sge;
+ qp->s_len = len = wqe->length;
+ ss = &qp->s_sge;
+ bth2 = 0;
+ switch (wqe->wr.opcode) {
+ case IB_WR_SEND:
+ case IB_WR_SEND_WITH_IMM:
+ /* If no credit, return. */
+ if (qp->s_lsn != (u32) -1 &&
+ ipath_cmp24(wqe->ssn,
+ qp->s_lsn + 1) > 0)
+ goto done;
+ wqe->lpsn = wqe->psn;
+ if (len > pmtu) {
+ wqe->lpsn += (len - 1) / pmtu;
+ qp->s_state =
+ IB_OPCODE_RC_SEND_FIRST;
+ len = pmtu;
+ break;
+ }
+ if (wqe->wr.opcode == IB_WR_SEND)
+ qp->s_state =
+ IB_OPCODE_RC_SEND_ONLY;
+ else {
+ qp->s_state =
+ IB_OPCODE_RC_SEND_ONLY_WITH_IMMEDIATE;
+ /*
+ * Immediate data comes after the
+ * BTH
+ */
+ ohdr->u.imm_data = wqe->wr.imm_data;
+ hwords += 1;
+ }
+ if (wqe->wr.send_flags & IB_SEND_SOLICITED)
+ bth0 |= 1 << 23;
+ bth2 = 1 << 31; /* Request ACK. */
+ if (++qp->s_cur == qp->s_size)
+ qp->s_cur = 0;
+ break;
+
+ case IB_WR_RDMA_WRITE:
+ if (newreq)
+ qp->s_lsn++;
+ /* FALLTHROUGH */
+ case IB_WR_RDMA_WRITE_WITH_IMM:
+ /* If no credit, return. */
+ if (qp->s_lsn != (u32) -1 &&
+ ipath_cmp24(wqe->ssn,
+ qp->s_lsn + 1) > 0)
+ goto done;
+ ohdr->u.rc.reth.vaddr =
+ cpu_to_be64(wqe->wr.wr.rdma.remote_addr);
+ ohdr->u.rc.reth.rkey =
+ cpu_to_be32(wqe->wr.wr.rdma.rkey);
+ ohdr->u.rc.reth.length = cpu_to_be32(len);
+ hwords += sizeof(struct ib_reth) / 4;
+ wqe->lpsn = wqe->psn;
+ if (len > pmtu) {
+ wqe->lpsn += (len - 1) / pmtu;
+ qp->s_state =
+ IB_OPCODE_RC_RDMA_WRITE_FIRST;
+ len = pmtu;
+ break;
+ }
+ if (wqe->wr.opcode == IB_WR_RDMA_WRITE)
+ qp->s_state =
+ IB_OPCODE_RC_RDMA_WRITE_ONLY;
+ else {
+ qp->s_state =
+ IB_OPCODE_RC_RDMA_WRITE_ONLY_WITH_IMMEDIATE;
+ /* Immediate data comes after RETH */
+ ohdr->u.rc.imm_data = wqe->wr.imm_data;
+ hwords += 1;
+ if (wqe->wr.
+ send_flags & IB_SEND_SOLICITED)
+ bth0 |= 1 << 23;
+ }
+ bth2 = 1 << 31; /* Request ACK. */
+ if (++qp->s_cur == qp->s_size)
+ qp->s_cur = 0;
+ break;
+
+ case IB_WR_RDMA_READ:
+ ohdr->u.rc.reth.vaddr =
+ cpu_to_be64(wqe->wr.wr.rdma.remote_addr);
+ ohdr->u.rc.reth.rkey =
+ cpu_to_be32(wqe->wr.wr.rdma.rkey);
+ ohdr->u.rc.reth.length = cpu_to_be32(len);
+ qp->s_state = IB_OPCODE_RC_RDMA_READ_REQUEST;
+ hwords += sizeof(ohdr->u.rc.reth) / 4;
+ if (newreq) {
+ qp->s_lsn++;
+ /*
+ * Adjust s_next_psn to count the
+ * expected number of responses.
+ */
+ if (len > pmtu)
+ qp->s_next_psn +=
+ (len - 1) / pmtu;
+ wqe->lpsn = qp->s_next_psn++;
+ }
+ ss = NULL;
+ len = 0;
+ if (++qp->s_cur == qp->s_size)
+ qp->s_cur = 0;
+ break;
+
+ case IB_WR_ATOMIC_CMP_AND_SWP:
+ case IB_WR_ATOMIC_FETCH_AND_ADD:
+ qp->s_state = (wqe->wr.opcode ==
+ IB_WR_ATOMIC_CMP_AND_SWP)
+ ? IB_OPCODE_RC_COMPARE_SWAP
+ : IB_OPCODE_RC_FETCH_ADD;
+ ohdr->u.atomic_eth.vaddr =
+ cpu_to_be64(wqe->wr.wr.atomic.remote_addr);
+ ohdr->u.atomic_eth.rkey =
+ cpu_to_be32(wqe->wr.wr.atomic.rkey);
+ ohdr->u.atomic_eth.swap_data =
+ cpu_to_be64(wqe->wr.wr.atomic.swap);
+ ohdr->u.atomic_eth.compare_data =
+ cpu_to_be64(wqe->wr.wr.atomic.compare_add);
+ hwords += sizeof(struct ib_atomic_eth) / 4;
+ if (newreq) {
+ qp->s_lsn++;
+ wqe->lpsn = wqe->psn;
+ }
+ if (++qp->s_cur == qp->s_size)
+ qp->s_cur = 0;
+ ss = NULL;
+ len = 0;
+ break;
+
+ default:
+ goto done;
+ }
+ if (newreq) {
+ qp->s_tail++;
+ if (qp->s_tail >= qp->s_size)
+ qp->s_tail = 0;
+ }
+ bth2 |= qp->s_psn++ & IPS_PSN_MASK;
+ if ((int)(qp->s_psn - qp->s_next_psn) > 0)
+ qp->s_next_psn = qp->s_psn;
+ spin_lock(&dev->pending_lock);
+ if (qp->timerwait.next == LIST_POISON1)
+ list_add_tail(&qp->timerwait,
+ &dev->pending[dev->
+ pending_index]);
+ spin_unlock(&dev->pending_lock);
+ break;
+
+ case IB_OPCODE_RC_RDMA_READ_RESPONSE_FIRST:
+ /*
+ * This case can only happen if a send is
+ * restarted. See ipath_restart_rc().
+ */
+ ipath_init_restart(qp, wqe);
+ /* FALLTHROUGH */
+ case IB_OPCODE_RC_SEND_FIRST:
+ qp->s_state = IB_OPCODE_RC_SEND_MIDDLE;
+ /* FALLTHROUGH */
+ case IB_OPCODE_RC_SEND_MIDDLE:
+ bth2 = qp->s_psn++ & IPS_PSN_MASK;
+ if ((int)(qp->s_psn - qp->s_next_psn) > 0)
+ qp->s_next_psn = qp->s_psn;
+ ss = &qp->s_sge;
+ len = qp->s_len;
+ if (len > pmtu) {
+ /*
+ * Request an ACK every 1/2 MB to avoid
+ * retransmit timeouts.
+ */
+ if (((wqe->length - len) %
+ (512 * 1024)) == 0)
+ bth2 |= 1 << 31;
+ len = pmtu;
+ break;
+ }
+ if (wqe->wr.opcode == IB_WR_SEND)
+ qp->s_state = IB_OPCODE_RC_SEND_LAST;
+ else {
+ qp->s_state =
+ IB_OPCODE_RC_SEND_LAST_WITH_IMMEDIATE;
+ /* Immediate data comes after the BTH */
+ ohdr->u.imm_data = wqe->wr.imm_data;
+ hwords += 1;
+ }
+ if (wqe->wr.send_flags & IB_SEND_SOLICITED)
+ bth0 |= 1 << 23;
+ bth2 |= 1 << 31; /* Request ACK. */
+ qp->s_cur++;
+ if (qp->s_cur >= qp->s_size)
+ qp->s_cur = 0;
+ break;
+
+ case IB_OPCODE_RC_RDMA_READ_RESPONSE_LAST:
+ /*
+ * This case can only happen if a RDMA write is
+ * restarted. See ipath_restart_rc().
+ */
+ ipath_init_restart(qp, wqe);
+ /* FALLTHROUGH */
+ case IB_OPCODE_RC_RDMA_WRITE_FIRST:
+ qp->s_state = IB_OPCODE_RC_RDMA_WRITE_MIDDLE;
+ /* FALLTHROUGH */
+ case IB_OPCODE_RC_RDMA_WRITE_MIDDLE:
+ bth2 = qp->s_psn++ & IPS_PSN_MASK;
+ if ((int)(qp->s_psn - qp->s_next_psn) > 0)
+ qp->s_next_psn = qp->s_psn;
+ ss = &qp->s_sge;
+ len = qp->s_len;
+ if (len > pmtu) {
+ /*
+ * Request an ACK every 1/2 MB to avoid
+ * retransmit timeouts.
+ */
+ if (((wqe->length - len) %
+ (512 * 1024)) == 0)
+ bth2 |= 1 << 31;
+ len = pmtu;
+ break;
+ }
+ if (wqe->wr.opcode == IB_WR_RDMA_WRITE)
+ qp->s_state = IB_OPCODE_RC_RDMA_WRITE_LAST;
+ else {
+ qp->s_state =
+ IB_OPCODE_RC_RDMA_WRITE_LAST_WITH_IMMEDIATE;
+ /* Immediate data comes after the BTH */
+ ohdr->u.imm_data = wqe->wr.imm_data;
+ hwords += 1;
+ if (wqe->wr.send_flags & IB_SEND_SOLICITED)
+ bth0 |= 1 << 23;
+ }
+ bth2 |= 1 << 31; /* Request ACK. */
+ qp->s_cur++;
+ if (qp->s_cur >= qp->s_size)
+ qp->s_cur = 0;
+ break;
+
+ case IB_OPCODE_RC_RDMA_READ_RESPONSE_MIDDLE:
+ /*
+ * This case can only happen if a RDMA read is
+ * restarted. See ipath_restart_rc().
+ */
+ ipath_init_restart(qp, wqe);
+ len = ((qp->s_psn - wqe->psn) &
+ IPS_PSN_MASK) * pmtu;
+ ohdr->u.rc.reth.vaddr =
+ cpu_to_be64(wqe->wr.wr.rdma.remote_addr +
+ len);
+ ohdr->u.rc.reth.rkey =
+ cpu_to_be32(wqe->wr.wr.rdma.rkey);
+ ohdr->u.rc.reth.length = cpu_to_be32(qp->s_len);
+ qp->s_state = IB_OPCODE_RC_RDMA_READ_REQUEST;
+ hwords += sizeof(ohdr->u.rc.reth) / 4;
+ bth2 = qp->s_psn++ & IPS_PSN_MASK;
+ if ((int)(qp->s_psn - qp->s_next_psn) > 0)
+ qp->s_next_psn = qp->s_psn;
+ ss = NULL;
+ len = 0;
+ qp->s_cur++;
+ if (qp->s_cur == qp->s_size)
+ qp->s_cur = 0;
+ break;
+
+ case IB_OPCODE_RC_RDMA_READ_REQUEST:
+ case IB_OPCODE_RC_COMPARE_SWAP:
+ case IB_OPCODE_RC_FETCH_ADD:
+ /*
+ * We shouldn't start anything new until this
+ * request is finished. The ACK will handle
+ * rescheduling us. XXX The number of outstanding
+ * ones is negotiated at connection setup time (see
+ * pg. 258,289)? XXX Also, if we support multiple
+ * outstanding requests, we need to check the WQE
+ * IB_SEND_FENCE flag and not send a new request if
+ * a RDMA read or atomic is pending.
+ */
+ goto done;
+ }
+ qp->s_len -= len;
+ bth0 |= qp->s_state << 24;
+ /* XXX queue resend timeout. */
+ }
+ /* Make sure it is non-zero before dropping the lock. */
+ qp->s_hdrwords = hwords;
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+
+ /* Construct the header. */
+ extra_bytes = (4 - len) & 3;
+ nwords = (len + extra_bytes) >> 2;
+ if (unlikely(qp->remote_ah_attr.ah_flags & IB_AH_GRH)) {
+ /* Header size in 32-bit words. */
+ hwords += 10;
+ lrh0 = IPS_LRH_GRH;
+ qp->s_hdr.u.l.grh.version_tclass_flow =
+ cpu_to_be32((6 << 28) |
+ (qp->remote_ah_attr.grh.traffic_class
+ << 20) |
+ qp->remote_ah_attr.grh.flow_label);
+ qp->s_hdr.u.l.grh.paylen =
+ cpu_to_be16(((hwords - 12) + nwords +
+ SIZE_OF_CRC) << 2);
+ /* next_hdr is defined by C8-7 in ch. 8.4.1 */
+ qp->s_hdr.u.l.grh.next_hdr = 0x1B;
+ qp->s_hdr.u.l.grh.hop_limit =
+ qp->remote_ah_attr.grh.hop_limit;
+ /* The SGID is 32-bit aligned. */
+ qp->s_hdr.u.l.grh.sgid.global.subnet_prefix =
+ dev->gid_prefix;
+ qp->s_hdr.u.l.grh.sgid.global.interface_id =
+ ipath_layer_get_guid(dev->dd);
+ qp->s_hdr.u.l.grh.dgid = qp->remote_ah_attr.grh.dgid;
+ qp->s_hdrwords = hwords;
+ }
+ qp->s_cur_sge = ss;
+ qp->s_cur_size = len;
+ lrh0 |= qp->remote_ah_attr.sl << 4;
+ qp->s_hdr.lrh[0] = cpu_to_be16(lrh0);
+ /* DEST LID */
+ qp->s_hdr.lrh[1] = cpu_to_be16(qp->remote_ah_attr.dlid);
+ qp->s_hdr.lrh[2] = cpu_to_be16(hwords + nwords + SIZE_OF_CRC);
+ qp->s_hdr.lrh[3] = cpu_to_be16(ipath_layer_get_lid(dev->dd));
+ bth0 |= extra_bytes << 20;
+ ohdr->bth[0] = cpu_to_be32(bth0);
+ ohdr->bth[1] = cpu_to_be32(qp->remote_qpn);
+ ohdr->bth[2] = cpu_to_be32(bth2);
+
+ /* Check for more work to do. */
+ goto again;
+
+done:
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ clear_bit(IPATH_S_BUSY, &qp->s_flags);
+}
+
+static void send_rc_ack(struct ipath_qp *qp)
+{
+ struct ipath_ibdev *dev = to_idev(qp->ibqp.device);
+ u16 lrh0;
+ u32 bth0;
+ u32 hwords;
+ struct ipath_other_headers *ohdr;
+
+ /* Construct the header. */
+ ohdr = &qp->s_hdr.u.oth;
+ lrh0 = IPS_LRH_BTH;
+ /* header size in 32-bit words LRH+BTH+AETH = (8+12+4)/4. */
+ hwords = 6;
+ if (unlikely(qp->remote_ah_attr.ah_flags & IB_AH_GRH)) {
+ ohdr = &qp->s_hdr.u.l.oth;
+ /* Header size in 32-bit words. */
+ hwords += 10;
+ lrh0 = IPS_LRH_GRH;
+ qp->s_hdr.u.l.grh.version_tclass_flow =
+ cpu_to_be32(
+ (6 << 28) |
+ (qp->remote_ah_attr.grh.traffic_class
+ << 20) |
+ qp->remote_ah_attr.grh.flow_label);
+ qp->s_hdr.u.l.grh.paylen =
+ cpu_to_be16(((hwords - 12) + SIZE_OF_CRC) << 2);
+ /* next_hdr is defined by C8-7 in ch. 8.4.1 */
+ qp->s_hdr.u.l.grh.next_hdr = 0x1B;
+ qp->s_hdr.u.l.grh.hop_limit =
+ qp->remote_ah_attr.grh.hop_limit;
+ /* The SGID is 32-bit aligned. */
+ qp->s_hdr.u.l.grh.sgid.global.subnet_prefix =
+ dev->gid_prefix;
+ qp->s_hdr.u.l.grh.sgid.global.interface_id =
+ ipath_layer_get_guid(dev->dd);
+ qp->s_hdr.u.l.grh.dgid = qp->remote_ah_attr.grh.dgid;
+ }
+ bth0 = ipath_layer_get_pkey(dev->dd, qp->s_pkey_index);
+ ohdr->u.aeth = ipath_compute_aeth(qp);
+ if (qp->s_ack_state >= IB_OPCODE_RC_COMPARE_SWAP) {
+ bth0 |= IB_OPCODE_ATOMIC_ACKNOWLEDGE << 24;
+ ohdr->u.at.atomic_ack_eth = cpu_to_be64(qp->s_ack_atomic);
+ hwords += sizeof(ohdr->u.at.atomic_ack_eth) / 4;
+ }
+ else
+ bth0 |= IB_OPCODE_RC_ACKNOWLEDGE << 24;
+ lrh0 |= qp->remote_ah_attr.sl << 4;
+ qp->s_hdr.lrh[0] = cpu_to_be16(lrh0);
+ /* DEST LID */
+ qp->s_hdr.lrh[1] = cpu_to_be16(qp->remote_ah_attr.dlid);
+ qp->s_hdr.lrh[2] = cpu_to_be16(hwords + SIZE_OF_CRC);
+ qp->s_hdr.lrh[3] = cpu_to_be16(ipath_layer_get_lid(dev->dd));
+ ohdr->bth[0] = cpu_to_be32(bth0);
+ ohdr->bth[1] = cpu_to_be32(qp->remote_qpn);
+ ohdr->bth[2] = cpu_to_be32(qp->s_ack_psn & IPS_PSN_MASK);
+
+ /*
+ * If we can send the ACK, clear the ACK state.
+ */
+ if (ipath_verbs_send(dev->dd, hwords, (u32 *) &qp->s_hdr,
+ 0, NULL) == 0) {
+ qp->s_ack_state = IB_OPCODE_RC_ACKNOWLEDGE;
+ dev->n_rc_qacks++;
+ dev->n_unicast_xmit++;
+ }
+}
+
+/**
+ * ipath_restart_rc - back up the requester to resend the last un-ACKed request
+ * @qp: the QP to restart
+ * @psn: packet sequence number for the request
+ * @wc: the work completion request
+ *
+ * The QP s_lock should be held.
+ */
+void ipath_restart_rc(struct ipath_qp *qp, u32 psn, struct ib_wc *wc)
+{
+ struct ipath_swqe *wqe = get_swqe_ptr(qp, qp->s_last);
+ struct ipath_ibdev *dev;
+ u32 n;
+
+ /*
+ * If there are no requests pending, we are done.
+ */
+ if (ipath_cmp24(psn, qp->s_next_psn) >= 0 ||
+ qp->s_last == qp->s_tail)
+ goto done;
+
+ if (qp->s_retry == 0) {
+ wc->wr_id = wqe->wr.wr_id;
+ wc->status = IB_WC_RETRY_EXC_ERR;
+ wc->opcode = ib_ipath_wc_opcode[wqe->wr.opcode];
+ wc->vendor_err = 0;
+ wc->byte_len = 0;
+ wc->qp_num = qp->ibqp.qp_num;
+ wc->src_qp = qp->remote_qpn;
+ wc->pkey_index = 0;
+ wc->slid = qp->remote_ah_attr.dlid;
+ wc->sl = qp->remote_ah_attr.sl;
+ wc->dlid_path_bits = 0;
+ wc->port_num = 0;
+ ipath_sqerror_qp(qp, wc);
+ return;
+ }
+ qp->s_retry--;
+
+ /*
+ * Remove the QP from the timeout queue.
+ * Note: it may already have been removed by ipath_ib_timer().
+ */
+ dev = to_idev(qp->ibqp.device);
+ spin_lock(&dev->pending_lock);
+ if (qp->timerwait.next != LIST_POISON1)
+ list_del(&qp->timerwait);
+ spin_unlock(&dev->pending_lock);
+
+ if (wqe->wr.opcode == IB_WR_RDMA_READ)
+ dev->n_rc_resends++;
+ else
+ dev->n_rc_resends += (int)qp->s_psn - (int)psn;
+
+ /*
+ * If we are starting the request from the beginning, let the
+ * normal send code handle initialization.
+ */
+ qp->s_cur = qp->s_last;
+ if (ipath_cmp24(psn, wqe->psn) <= 0) {
+ qp->s_state = IB_OPCODE_RC_SEND_LAST;
+ qp->s_psn = wqe->psn;
+ } else {
+ n = qp->s_cur;
+ for (;;) {
+ if (++n == qp->s_size)
+ n = 0;
+ if (n == qp->s_tail) {
+ if (ipath_cmp24(psn, qp->s_next_psn) >= 0) {
+ qp->s_cur = n;
+ wqe = get_swqe_ptr(qp, n);
+ }
+ break;
+ }
+ wqe = get_swqe_ptr(qp, n);
+ if (ipath_cmp24(psn, wqe->psn) < 0)
+ break;
+ qp->s_cur = n;
+ }
+ qp->s_psn = psn;
+
+ /*
+ * Reset the state to restart in the middle of a request.
+ * Don't change the s_sge, s_cur_sge, or s_cur_size.
+ * See ipath_do_rc_send().
+ */
+ switch (wqe->wr.opcode) {
+ case IB_WR_SEND:
+ case IB_WR_SEND_WITH_IMM:
+ qp->s_state = IB_OPCODE_RC_RDMA_READ_RESPONSE_FIRST;
+ break;
+
+ case IB_WR_RDMA_WRITE:
+ case IB_WR_RDMA_WRITE_WITH_IMM:
+ qp->s_state = IB_OPCODE_RC_RDMA_READ_RESPONSE_LAST;
+ break;
+
+ case IB_WR_RDMA_READ:
+ qp->s_state =
+ IB_OPCODE_RC_RDMA_READ_RESPONSE_MIDDLE;
+ break;
+
+ default:
+ /*
+ * This case shouldn't happen since its only
+ * one PSN per req.
+ */
+ qp->s_state = IB_OPCODE_RC_SEND_LAST;
+ }
+ }
+
+done:
+ tasklet_hi_schedule(&qp->s_task);
+}
+
+/**
+ * do_rc_ack - process an incoming RC ACK
+ * @qp: the QP the ACK came in on
+ * @psn: the packet sequence number of the ACK
+ * @opcode: the opcode of the request that resulted in the ACK
+ *
+ * This is called from ipath_rc_rcv() to process an incoming RC ACK
+ * for the given QP.
+ * Called at interrupt level with the QP s_lock held.
+ * Returns 1 if OK, 0 if current operation should be aborted (NAK).
+ */
+static int do_rc_ack(struct ipath_qp *qp, u32 aeth, u32 psn, int opcode)
+{
+ struct ipath_ibdev *dev = to_idev(qp->ibqp.device);
+ struct ib_wc wc;
+ struct ipath_swqe *wqe;
+
+ /*
+ * Remove the QP from the timeout queue (or RNR timeout queue).
+ * If ipath_ib_timer() has already removed it,
+ * it's OK since we hold the QP s_lock and ipath_restart_rc()
+ * just won't find anything to restart if we ACK everything.
+ */
+ spin_lock(&dev->pending_lock);
+ if (qp->timerwait.next != LIST_POISON1)
+ list_del(&qp->timerwait);
+ spin_unlock(&dev->pending_lock);
+
+ /*
+ * Note that NAKs implicitly ACK outstanding SEND and
+ * RDMA write requests and implicitly NAK RDMA read and
+ * atomic requests issued before the NAK'ed request.
+ * The MSN won't include the NAK'ed request but will include
+ * an ACK'ed request(s).
+ */
+ wqe = get_swqe_ptr(qp, qp->s_last);
+
+ /* Nothing is pending to ACK/NAK. */
+ if (qp->s_last == qp->s_tail)
+ return 0;
+
+ /*
+ * The MSN might be for a later WQE than the PSN indicates so
+ * only complete WQEs that the PSN finishes.
+ */
+ while (ipath_cmp24(psn, wqe->lpsn) >= 0) {
+ /* If we are ACKing a WQE, the MSN should be >= the SSN. */
+ if (ipath_cmp24(aeth, wqe->ssn) < 0)
+ break;
+ /*
+ * If this request is a RDMA read or atomic, and the ACK is
+ * for a later operation, this ACK NAKs the RDMA read or
+ * atomic. In other words, only a RDMA_READ_LAST or ONLY
+ * can ACK a RDMA read and likewise for atomic ops. Note
+ * that the NAK case can only happen if relaxed ordering is
+ * used and requests are sent after an RDMA read or atomic
+ * is sent but before the response is received.
+ */
+ if ((wqe->wr.opcode == IB_WR_RDMA_READ &&
+ opcode != IB_OPCODE_RC_RDMA_READ_RESPONSE_LAST) ||
+ ((wqe->wr.opcode == IB_WR_ATOMIC_CMP_AND_SWP ||
+ wqe->wr.opcode == IB_WR_ATOMIC_FETCH_AND_ADD) &&
+ (opcode != IB_OPCODE_RC_ATOMIC_ACKNOWLEDGE ||
+ ipath_cmp24(wqe->psn, psn) != 0))) {
+ /*
+ * The last valid PSN seen is the previous
+ * request's.
+ */
+ qp->s_last_psn = wqe->psn - 1;
+ /* Retry this request. */
+ ipath_restart_rc(qp, wqe->psn, &wc);
+ /*
+ * No need to process the ACK/NAK since we are
+ * restarting an earlier request.
+ */
+ return 0;
+ }
+ /* Post a send completion queue entry if requested. */
+ if (!test_bit(IPATH_S_SIGNAL_REQ_WR, &qp->s_flags) ||
+ (wqe->wr.send_flags & IB_SEND_SIGNALED)) {
+ wc.wr_id = wqe->wr.wr_id;
+ wc.status = IB_WC_SUCCESS;
+ wc.opcode = ib_ipath_wc_opcode[wqe->wr.opcode];
+ wc.vendor_err = 0;
+ wc.byte_len = wqe->length;
+ wc.qp_num = qp->ibqp.qp_num;
+ wc.src_qp = qp->remote_qpn;
+ wc.pkey_index = 0;
+ wc.slid = qp->remote_ah_attr.dlid;
+ wc.sl = qp->remote_ah_attr.sl;
+ wc.dlid_path_bits = 0;
+ wc.port_num = 0;
+ ipath_cq_enter(to_icq(qp->ibqp.send_cq), &wc, 0);
+ }
+ qp->s_retry = qp->s_retry_cnt;
+ /*
+ * If we are completing a request which is in the process
+ * of being resent, we can stop resending it since we know
+ * the responder has already seen it.
+ */
+ if (qp->s_last == qp->s_cur) {
+ if (++qp->s_cur >= qp->s_size)
+ qp->s_cur = 0;
+ wqe = get_swqe_ptr(qp, qp->s_cur);
+ qp->s_state = IB_OPCODE_RC_SEND_LAST;
+ qp->s_psn = wqe->psn;
+ }
+ if (++qp->s_last >= qp->s_size)
+ qp->s_last = 0;
+ wqe = get_swqe_ptr(qp, qp->s_last);
+ if (qp->s_last == qp->s_tail)
+ break;
+ }
+
+ switch (aeth >> 29) {
+ case 0: /* ACK */
+ dev->n_rc_acks++;
+ /* If this is a partial ACK, reset the retransmit timer. */
+ if (qp->s_last != qp->s_tail) {
+ spin_lock(&dev->pending_lock);
+ list_add_tail(&qp->timerwait,
+ &dev->pending[dev->pending_index]);
+ spin_unlock(&dev->pending_lock);
+ }
+ ipath_get_credit(qp, aeth);
+ qp->s_rnr_retry = qp->s_rnr_retry_cnt;
+ qp->s_retry = qp->s_retry_cnt;
+ qp->s_last_psn = psn;
+ return 1;
+
+ case 1: /* RNR NAK */
+ dev->n_rnr_naks++;
+ if (qp->s_rnr_retry == 0) {
+ if (qp->s_last == qp->s_tail)
+ return 0;
+
+ wc.status = IB_WC_RNR_RETRY_EXC_ERR;
+ goto class_b;
+ }
+ if (qp->s_rnr_retry_cnt < 7)
+ qp->s_rnr_retry--;
+ if (qp->s_last == qp->s_tail)
+ return 0;
+
+ /* The last valid PSN seen is the previous request's. */
+ qp->s_last_psn = wqe->psn - 1;
+
+ /* Restart this request after the RNR timeout. */
+ wqe = get_swqe_ptr(qp, qp->s_last);
+
+ dev->n_rc_resends += (int)qp->s_psn - (int)psn;
+
+ /*
+ * If we are starting the request from the beginning, let
+ * the normal send code handle initialization.
+ */
+ qp->s_cur = qp->s_last;
+ if (ipath_cmp24(psn, wqe->psn) <= 0) {
+ qp->s_state = IB_OPCODE_RC_SEND_LAST;
+ qp->s_psn = wqe->psn;
+ } else {
+ u32 n;
+
+ n = qp->s_cur;
+ for (;;) {
+ if (++n == qp->s_size)
+ n = 0;
+ if (n == qp->s_tail) {
+ if (ipath_cmp24(psn,
+ qp->s_next_psn)
+ >= 0) {
+ qp->s_cur = n;
+ wqe = get_swqe_ptr(qp, n);
+ }
+ break;
+ }
+ wqe = get_swqe_ptr(qp, n);
+ if (ipath_cmp24(psn, wqe->psn) < 0)
+ break;
+ qp->s_cur = n;
+ }
+ qp->s_psn = psn;
+
+ /*
+ * Set the state to restart in the middle of a
+ * request. Don't change the s_sge, s_cur_sge, or
+ * s_cur_size. See ipath_do_rc_send().
+ */
+ switch (wqe->wr.opcode) {
+ case IB_WR_SEND:
+ case IB_WR_SEND_WITH_IMM:
+ qp->s_state =
+ IB_OPCODE_RC_RDMA_READ_RESPONSE_FIRST;
+ break;
+
+ case IB_WR_RDMA_WRITE:
+ case IB_WR_RDMA_WRITE_WITH_IMM:
+ qp->s_state =
+ IB_OPCODE_RC_RDMA_READ_RESPONSE_LAST;
+ break;
+
+ case IB_WR_RDMA_READ:
+ qp->s_state =
+ IB_OPCODE_RC_RDMA_READ_RESPONSE_MIDDLE;
+ break;
+
+ default:
+ /*
+ * This case shouldn't happen since its only
+ * one PSN per req.
+ */
+ qp->s_state = IB_OPCODE_RC_SEND_LAST;
+ }
+ }
+
+ qp->s_rnr_timeout =
+ ib_ipath_rnr_table[(aeth >> IPS_AETH_CREDIT_SHIFT) &
+ IPS_AETH_CREDIT_MASK];
+ ipath_insert_rnr_queue(qp);
+ return 0;
+
+ case 3: /* NAK */
+ /* The last valid PSN seen is the previous request's. */
+ if (qp->s_last != qp->s_tail)
+ qp->s_last_psn = wqe->psn - 1;
+ switch ((aeth >> IPS_AETH_CREDIT_SHIFT) &
+ IPS_AETH_CREDIT_MASK) {
+ case 0: /* PSN sequence error */
+ dev->n_seq_naks++;
+ /*
+ * Back up to the responder's expected PSN.
+ * XXX Note that we might get a NAK in the
+ * middle of an RDMA READ response which
+ * terminates the RDMA READ.
+ */
+ if (qp->s_last == qp->s_tail)
+ break;
+
+ if (ipath_cmp24(psn, wqe->psn) < 0)
+ break;
+
+ /* Retry the request. */
+ ipath_restart_rc(qp, psn, &wc);
+ break;
+
+ case 1: /* Invalid Request */
+ wc.status = IB_WC_REM_INV_REQ_ERR;
+ dev->n_other_naks++;
+ goto class_b;
+
+ case 2: /* Remote Access Error */
+ wc.status = IB_WC_REM_ACCESS_ERR;
+ dev->n_other_naks++;
+ goto class_b;
+
+ case 3: /* Remote Operation Error */
+ wc.status = IB_WC_REM_OP_ERR;
+ dev->n_other_naks++;
+ class_b:
+ wc.wr_id = wqe->wr.wr_id;
+ wc.opcode = ib_ipath_wc_opcode[wqe->wr.opcode];
+ wc.vendor_err = 0;
+ wc.byte_len = 0;
+ wc.qp_num = qp->ibqp.qp_num;
+ wc.src_qp = qp->remote_qpn;
+ wc.pkey_index = 0;
+ wc.slid = qp->remote_ah_attr.dlid;
+ wc.sl = qp->remote_ah_attr.sl;
+ wc.dlid_path_bits = 0;
+ wc.port_num = 0;
+ ipath_sqerror_qp(qp, &wc);
+ break;
+
+ default:
+ /* Ignore other reserved NAK error codes */
+ goto reserved;
+ }
+ qp->s_rnr_retry = qp->s_rnr_retry_cnt;
+ return 0;
+
+ default: /* 2: reserved */
+ reserved:
+ /* Ignore reserved NAK codes. */
+ return 0;
+ }
+}
+
+/**
+ * ipath_rc_rcv - process an incoming RC packet
+ * @dev: the device this packet came in on
+ * @hdr: the header of this packet
+ * @has_grh: true if the header has a GRH
+ * @data: the packet data
+ * @tlen: the packet length
+ * @qp: the QP for this packet
+ *
+ * This is called from ipath_qp_rcv() to process an incoming RC packet
+ * for the given QP.
+ * Called at interrupt level.
+ */
+void ipath_rc_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr,
+ int has_grh, void *data, u32 tlen, struct ipath_qp *qp)
+{
+ struct ipath_other_headers *ohdr;
+ int opcode;
+ u32 hdrsize;
+ u32 psn;
+ u32 pad;
+ unsigned long flags;
+ struct ib_wc wc;
+ u32 pmtu = ib_mtu_enum_to_int(qp->path_mtu);
+ int diff;
+ struct ib_reth *reth;
+
+ /* Check for GRH */
+ if (!has_grh) {
+ ohdr = &hdr->u.oth;
+ hdrsize = 8 + 12; /* LRH + BTH */
+ psn = be32_to_cpu(ohdr->bth[2]);
+ } else {
+ ohdr = &hdr->u.l.oth;
+ hdrsize = 8 + 40 + 12; /* LRH + GRH + BTH */
+ /*
+ * The header with GRH is 60 bytes and the
+ * core driver sets the eager header buffer
+ * size to 56 bytes so the last 4 bytes of
+ * the BTH header (PSN) is in the data buffer.
+ */
+ psn = be32_to_cpu(((u32 *) data)[0]);
+ data += sizeof(u32);
+ }
+ /*
+ * The opcode is in the low byte when its in network order
+ * (top byte when in host order).
+ */
+ opcode = be32_to_cpu(ohdr->bth[0]) >> 24;
+
+ /*
+ * Process responses (ACKs) before anything else.
+ * Note that the packet sequence number will be for something
+ * in the send work queue rather than the expected receive
+ * packet sequence number. In other words, this QP is the
+ * requester.
+ */
+ if (opcode >= IB_OPCODE_RC_RDMA_READ_RESPONSE_FIRST &&
+ opcode <= IB_OPCODE_RC_ATOMIC_ACKNOWLEDGE) {
+
+ spin_lock_irqsave(&qp->s_lock, flags);
+
+ /* Ignore invalid responses. */
+ if (ipath_cmp24(psn, qp->s_next_psn) >= 0)
+ goto ack_done;
+
+ /* Ignore duplicate responses. */
+ diff = ipath_cmp24(psn, qp->s_last_psn);
+ if (unlikely(diff <= 0)) {
+ /* Update credits for "ghost" ACKs */
+ if (diff == 0 &&
+ opcode == IB_OPCODE_RC_ACKNOWLEDGE) {
+ if (!has_grh) {
+ pad = be32_to_cpu(ohdr->u.aeth);
+ } else {
+ pad = be32_to_cpu(
+ ((u32 *) data)[0]);
+ data += sizeof(u32);
+ }
+ if ((pad >> 29) == 0)
+ ipath_get_credit(qp, pad);
+ }
+ goto ack_done;
+ }
+
+ switch (opcode) {
+ case IB_OPCODE_RC_ACKNOWLEDGE:
+ case IB_OPCODE_RC_ATOMIC_ACKNOWLEDGE:
+ case IB_OPCODE_RC_RDMA_READ_RESPONSE_FIRST:
+ if (!has_grh)
+ pad = be32_to_cpu(ohdr->u.aeth);
+ else {
+ pad = be32_to_cpu(((u32 *) data)[0]);
+ data += sizeof(u32);
+ }
+ if (opcode == IB_OPCODE_RC_ATOMIC_ACKNOWLEDGE)
+ *(u64 *) qp->s_sge.sge.vaddr =
+ *(u64 *) data;
+ if (!do_rc_ack(qp, pad, psn, opcode) ||
+ opcode != IB_OPCODE_RC_RDMA_READ_RESPONSE_FIRST)
+ goto ack_done;
+ hdrsize += 4;
+ /*
+ * do_rc_ack() has already checked the PSN so skip
+ * the sequence check.
+ */
+ goto rdma_read;
+
+ case IB_OPCODE_RC_RDMA_READ_RESPONSE_MIDDLE:
+ /* no AETH, no ACK */
+ if (unlikely(ipath_cmp24(psn,
+ qp->s_last_psn + 1))) {
+ dev->n_rdma_seq++;
+ ipath_restart_rc(qp, qp->s_last_psn + 1,
+ &wc);
+ goto ack_done;
+ }
+ rdma_read:
+ if (unlikely(qp->s_state !=
+ IB_OPCODE_RC_RDMA_READ_REQUEST))
+ goto ack_done;
+ if (unlikely(tlen != (hdrsize + pmtu + 4)))
+ goto ack_done;
+ if (unlikely(pmtu >= qp->s_len))
+ goto ack_done;
+ /* We got a response so update the timeout. */
+ if (unlikely(qp->s_last == qp->s_tail ||
+ get_swqe_ptr(qp, qp->s_last)->wr.opcode !=
+ IB_WR_RDMA_READ))
+ goto ack_done;
+ spin_lock(&dev->pending_lock);
+ if (qp->s_rnr_timeout == 0 &&
+ qp->timerwait.next != LIST_POISON1) {
+ list_move_tail(
+ &qp->timerwait,
+ &dev->pending[dev->pending_index]);
+ }
+ spin_unlock(&dev->pending_lock);
+ /*
+ * Update the RDMA receive state but do the copy w/o
+ * holding the locks and blocking interrupts.
+ * XXX Yet another place that affects relaxed
+ * RDMA order since we don't want s_sge modified.
+ */
+ qp->s_len -= pmtu;
+ qp->s_last_psn = psn;
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ ipath_copy_sge(&qp->s_sge, data, pmtu);
+ return;
+
+ case IB_OPCODE_RC_RDMA_READ_RESPONSE_LAST:
+ /* ACKs READ req. */
+ if (unlikely(ipath_cmp24(psn,
+ qp->s_last_psn + 1))) {
+ dev->n_rdma_seq++;
+ ipath_restart_rc(qp, qp->s_last_psn + 1,
+ &wc);
+ goto ack_done;
+ }
+ /* FALLTHROUGH */
+ case IB_OPCODE_RC_RDMA_READ_RESPONSE_ONLY:
+ if (unlikely(qp->s_state !=
+ IB_OPCODE_RC_RDMA_READ_REQUEST))
+ goto ack_done;
+ /*
+ * Get the number of bytes the message was padded
+ * by.
+ */
+ pad = (be32_to_cpu(ohdr->bth[0]) >> 20) & 3;
+ /*
+ * Check that the data size is >= 1 && <= pmtu.
+ * Remember to account for the AETH header (4) and
+ * ICRC (4).
+ */
+ if (unlikely(tlen <= (hdrsize + pad + 8))) {
+ /*
+ * XXX Need to generate an error CQ
+ * entry.
+ */
+ goto ack_done;
+ }
+ tlen -= hdrsize + pad + 8;
+ if (unlikely(tlen != qp->s_len)) {
+ /*
+ * XXX Need to generate an error CQ
+ * entry.
+ */
+ goto ack_done;
+ }
+ if (!has_grh) {
+ pad = be32_to_cpu(ohdr->u.aeth);
+ } else {
+ pad = be32_to_cpu(((u32 *) data)[0]);
+ data += sizeof(u32);
+ }
+ ipath_copy_sge(&qp->s_sge, data, tlen);
+ if (do_rc_ack(
+ qp, pad, psn,
+ IB_OPCODE_RC_RDMA_READ_RESPONSE_LAST)) {
+ /*
+ * Change the state so we contimue
+ * processing new requests.
+ */
+ qp->s_state = IB_OPCODE_RC_SEND_LAST;
+ }
+ goto ack_done;
+ }
+ ack_done:
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ return;
+ }
+
+ spin_lock_irqsave(&qp->r_rq.lock, flags);
+
+ /* Compute 24 bits worth of difference. */
+ diff = ipath_cmp24(psn, qp->r_psn);
+ if (unlikely(diff)) {
+ if (diff > 0) {
+ /*
+ * Packet sequence error.
+ * A NAK will ACK earlier sends and RDMA writes.
+ * Don't queue the NAK if a RDMA read, atomic, or
+ * NAK is pending though.
+ */
+ spin_lock(&qp->s_lock);
+ if ((qp->s_ack_state >=
+ IB_OPCODE_RC_RDMA_READ_REQUEST &&
+ qp->s_ack_state != IB_OPCODE_ACKNOWLEDGE) ||
+ qp->s_nak_state != 0) {
+ spin_unlock(&qp->s_lock);
+ goto done;
+ }
+ qp->s_ack_state = IB_OPCODE_RC_SEND_ONLY;
+ qp->s_nak_state = IB_NAK_PSN_ERROR;
+ /* Use the expected PSN. */
+ qp->s_ack_psn = qp->r_psn;
+ goto resched;
+ }
+
+ /*
+ * Handle a duplicate request. Don't re-execute SEND, RDMA
+ * write or atomic op. Don't NAK errors, just silently drop
+ * the duplicate request. Note that r_sge, r_len, and
+ * r_rcv_len may be in use so don't modify them.
+ *
+ * We are supposed to ACK the earliest duplicate PSN but we
+ * can coalesce an outstanding duplicate ACK. We have to
+ * send the earliest so that RDMA reads can be restarted at
+ * the requester's expected PSN.
+ */
+ spin_lock(&qp->s_lock);
+ if (qp->s_ack_state != IB_OPCODE_ACKNOWLEDGE &&
+ ipath_cmp24(psn, qp->s_ack_psn) >= 0) {
+ if (qp->s_ack_state < IB_OPCODE_RDMA_READ_REQUEST)
+ qp->s_ack_psn = psn;
+ spin_unlock(&qp->s_lock);
+ goto done;
+ }
+ switch (opcode) {
+ case IB_OPCODE_RC_RDMA_READ_REQUEST:
+ /*
+ * We have to be careful to not change s_rdma_sge
+ * while ipath_do_rc_send() is using it and not
+ * holding the s_lock.
+ */
+ if (qp->s_ack_state != IB_OPCODE_RC_ACKNOWLEDGE &&
+ qp->s_ack_state >=
+ IB_OPCODE_RDMA_READ_REQUEST) {
+ spin_unlock(&qp->s_lock);
+ dev->n_rdma_dup_busy++;
+ goto done;
+ }
+ /* RETH comes after BTH */
+ if (!has_grh)
+ reth = &ohdr->u.rc.reth;
+ else {
+ reth = (struct ib_reth *)data;
+ data += sizeof(*reth);
+ }
+ qp->s_rdma_len = be32_to_cpu(reth->length);
+ if (qp->s_rdma_len != 0) {
+ u32 rkey = be32_to_cpu(reth->rkey);
+ u64 vaddr = be64_to_cpu(reth->vaddr);
+
+ /*
+ * Address range must be a subset of the
+ * original request and start on pmtu
+ * boundaries.
+ */
+ if (unlikely(!ipath_rkey_ok(dev,
+ &qp->s_rdma_sge,
+ qp->s_rdma_len,
+ vaddr, rkey,
+ IB_ACCESS_REMOTE_READ)))
+ goto done;
+ } else {
+ qp->s_rdma_sge.sg_list = NULL;
+ qp->s_rdma_sge.num_sge = 0;
+ qp->s_rdma_sge.sge.mr = NULL;
+ qp->s_rdma_sge.sge.vaddr = NULL;
+ qp->s_rdma_sge.sge.length = 0;
+ qp->s_rdma_sge.sge.sge_length = 0;
+ }
+ break;
+
+ case IB_OPCODE_RC_COMPARE_SWAP:
+ case IB_OPCODE_RC_FETCH_ADD:
+ /*
+ * Check for the PSN of the last atomic operations
+ * performed and resend the result if found.
+ */
+ if ((psn & IPS_PSN_MASK) != qp->r_atomic_psn) {
+ spin_unlock(&qp->s_lock);
+ goto done;
+ }
+ qp->s_ack_atomic = qp->r_atomic_data;
+ break;
+ }
+ qp->s_ack_state = opcode;
+ qp->s_nak_state = 0;
+ qp->s_ack_psn = psn;
+ goto resched;
+ }
+
+ /* Check for opcode sequence errors. */
+ switch (qp->r_state) {
+ case IB_OPCODE_RC_SEND_FIRST:
+ case IB_OPCODE_RC_SEND_MIDDLE:
+ if (opcode == IB_OPCODE_RC_SEND_MIDDLE ||
+ opcode == IB_OPCODE_RC_SEND_LAST ||
+ opcode == IB_OPCODE_RC_SEND_LAST_WITH_IMMEDIATE)
+ break;
+ nack_inv:
+ /*
+ * A NAK will ACK earlier sends and RDMA writes.
+ * Don't queue the NAK if a RDMA read, atomic, or
+ * NAK is pending though.
+ */
+ spin_lock(&qp->s_lock);
+ if (qp->s_ack_state >= IB_OPCODE_RC_RDMA_READ_REQUEST &&
+ qp->s_ack_state != IB_OPCODE_ACKNOWLEDGE) {
+ spin_unlock(&qp->s_lock);
+ goto done;
+ }
+ /* XXX Flush WQEs */
+ qp->state = IB_QPS_ERR;
+ qp->s_ack_state = IB_OPCODE_RC_SEND_ONLY;
+ qp->s_nak_state = IB_NAK_INVALID_REQUEST;
+ qp->s_ack_psn = qp->r_psn;
+ goto resched;
+
+ case IB_OPCODE_RC_RDMA_WRITE_FIRST:
+ case IB_OPCODE_RC_RDMA_WRITE_MIDDLE:
+ if (opcode == IB_OPCODE_RC_RDMA_WRITE_MIDDLE ||
+ opcode == IB_OPCODE_RC_RDMA_WRITE_LAST ||
+ opcode == IB_OPCODE_RC_RDMA_WRITE_LAST_WITH_IMMEDIATE)
+ break;
+ goto nack_inv;
+
+ case IB_OPCODE_RC_RDMA_READ_REQUEST:
+ case IB_OPCODE_RC_COMPARE_SWAP:
+ case IB_OPCODE_RC_FETCH_ADD:
+ /*
+ * Drop all new requests until a response has been sent.
+ * A new request then ACKs the RDMA response we sent.
+ * Relaxed ordering would allow new requests to be
+ * processed but we would need to keep a queue
+ * of rwqe's for all that are in progress.
+ * Note that we can't RNR NAK this request since the RDMA
+ * READ or atomic response is already queued to be sent
+ * (unless we implement a response send queue).
+ */
+ goto done;
+
+ default:
+ if (opcode == IB_OPCODE_RC_SEND_MIDDLE ||
+ opcode == IB_OPCODE_RC_SEND_LAST ||
+ opcode == IB_OPCODE_RC_SEND_LAST_WITH_IMMEDIATE ||
+ opcode == IB_OPCODE_RC_RDMA_WRITE_MIDDLE ||
+ opcode == IB_OPCODE_RC_RDMA_WRITE_LAST ||
+ opcode == IB_OPCODE_RC_RDMA_WRITE_LAST_WITH_IMMEDIATE)
+ goto nack_inv;
+ break;
+ }
+
+ wc.imm_data = 0;
+ wc.wc_flags = 0;
+
+ /* OK, process the packet. */
+ switch (opcode) {
+ case IB_OPCODE_RC_SEND_FIRST:
+ if (!ipath_get_rwqe(qp, 0)) {
+ rnr_nak:
+ /*
+ * A RNR NAK will ACK earlier sends and RDMA writes.
+ * Don't queue the NAK if a RDMA read or atomic
+ * is pending though.
+ */
+ spin_lock(&qp->s_lock);
+ if (qp->s_ack_state >=
+ IB_OPCODE_RC_RDMA_READ_REQUEST &&
+ qp->s_ack_state != IB_OPCODE_ACKNOWLEDGE) {
+ spin_unlock(&qp->s_lock);
+ goto done;
+ }
+ qp->s_ack_state = IB_OPCODE_RC_SEND_ONLY;
+ qp->s_nak_state = IB_RNR_NAK | qp->s_min_rnr_timer;
+ qp->s_ack_psn = qp->r_psn;
+ goto resched;
+ }
+ qp->r_rcv_len = 0;
+ /* FALLTHROUGH */
+ case IB_OPCODE_RC_SEND_MIDDLE:
+ case IB_OPCODE_RC_RDMA_WRITE_MIDDLE:
+ send_middle:
+ /* Check for invalid length PMTU or posted rwqe len. */
+ if (unlikely(tlen != (hdrsize + pmtu + 4)))
+ goto nack_inv;
+ qp->r_rcv_len += pmtu;
+ if (unlikely(qp->r_rcv_len > qp->r_len))
+ goto nack_inv;
+ ipath_copy_sge(&qp->r_sge, data, pmtu);
+ break;
+
+ case IB_OPCODE_RC_RDMA_WRITE_LAST_WITH_IMMEDIATE:
+ /* consume RWQE */
+ if (!ipath_get_rwqe(qp, 1))
+ goto rnr_nak;
+ goto send_last_imm;
+
+ case IB_OPCODE_RC_SEND_ONLY:
+ case IB_OPCODE_RC_SEND_ONLY_WITH_IMMEDIATE:
+ if (!ipath_get_rwqe(qp, 0))
+ goto rnr_nak;
+ qp->r_rcv_len = 0;
+ if (opcode == IB_OPCODE_RC_SEND_ONLY)
+ goto send_last;
+ /* FALLTHROUGH */
+ case IB_OPCODE_RC_SEND_LAST_WITH_IMMEDIATE:
+ send_last_imm:
+ if (has_grh) {
+ wc.imm_data = *(u32 *) data;
+ data += sizeof(u32);
+ } else {
+ /* Immediate data comes after BTH */
+ wc.imm_data = ohdr->u.imm_data;
+ }
+ hdrsize += 4;
+ wc.wc_flags = IB_WC_WITH_IMM;
+ /* FALLTHROUGH */
+ case IB_OPCODE_RC_SEND_LAST:
+ case IB_OPCODE_RC_RDMA_WRITE_LAST:
+ send_last:
+ /* Get the number of bytes the message was padded by. */
+ pad = (be32_to_cpu(ohdr->bth[0]) >> 20) & 3;
+ /* Check for invalid length. */
+ /* XXX LAST len should be >= 1 */
+ if (unlikely(tlen < (hdrsize + pad + 4)))
+ goto nack_inv;
+ /* Don't count the CRC. */
+ tlen -= (hdrsize + pad + 4);
+ wc.byte_len = tlen + qp->r_rcv_len;
+ if (unlikely(wc.byte_len > qp->r_len)) {
+ goto nack_inv;
+ }
+ /* XXX Need to free SGEs */
+ ipath_copy_sge(&qp->r_sge, data, tlen);
+ atomic_inc(&qp->msn);
+ if (opcode == IB_OPCODE_RC_RDMA_WRITE_LAST ||
+ opcode == IB_OPCODE_RC_RDMA_WRITE_ONLY)
+ break;
+ wc.wr_id = qp->r_wr_id;
+ wc.status = IB_WC_SUCCESS;
+ wc.opcode = IB_WC_RECV;
+ wc.vendor_err = 0;
+ wc.qp_num = qp->ibqp.qp_num;
+ wc.src_qp = qp->remote_qpn;
+ wc.pkey_index = 0;
+ wc.slid = qp->remote_ah_attr.dlid;
+ wc.sl = qp->remote_ah_attr.sl;
+ wc.dlid_path_bits = 0;
+ wc.port_num = 0;
+ /* Signal completion event if the solicited bit is set. */
+ ipath_cq_enter(to_icq(qp->ibqp.recv_cq), &wc,
+ ohdr->bth[0] &
+ __constant_cpu_to_be32(1 << 23));
+ break;
+
+ case IB_OPCODE_RC_RDMA_WRITE_FIRST:
+ case IB_OPCODE_RC_RDMA_WRITE_ONLY:
+ case IB_OPCODE_RC_RDMA_WRITE_ONLY_WITH_IMMEDIATE:
+ /* consume RWQE */
+ /* RETH comes after BTH */
+ if (!has_grh)
+ reth = &ohdr->u.rc.reth;
+ else {
+ reth = (struct ib_reth *)data;
+ data += sizeof(*reth);
+ }
+ hdrsize += sizeof(*reth);
+ qp->r_len = be32_to_cpu(reth->length);
+ qp->r_rcv_len = 0;
+ if (qp->r_len != 0) {
+ u32 rkey = be32_to_cpu(reth->rkey);
+ u64 vaddr = be64_to_cpu(reth->vaddr);
+
+ /* Check rkey & NAK */
+ if (unlikely(!ipath_rkey_ok(dev, &qp->r_sge,
+ qp->r_len,
+ vaddr, rkey,
+ IB_ACCESS_REMOTE_WRITE))) {
+ nack_acc:
+ /*
+ * A NAK will ACK earlier sends and RDMA
+ * writes. Don't queue the NAK if a RDMA
+ * read, atomic, or NAK is pending though.
+ */
+ spin_lock(&qp->s_lock);
+ if (qp->s_ack_state >=
+ IB_OPCODE_RC_RDMA_READ_REQUEST &&
+ qp->s_ack_state != IB_OPCODE_ACKNOWLEDGE) {
+ spin_unlock(&qp->s_lock);
+ goto done;
+ }
+ /* XXX Flush WQEs */
+ qp->state = IB_QPS_ERR;
+ qp->s_ack_state = IB_OPCODE_RC_RDMA_WRITE_ONLY;
+ qp->s_nak_state = IB_NAK_REMOTE_ACCESS_ERROR;
+ qp->s_ack_psn = qp->r_psn;
+ goto resched;
+ }
+ } else {
+ qp->r_sge.sg_list = NULL;
+ qp->r_sge.sge.mr = NULL;
+ qp->r_sge.sge.vaddr = NULL;
+ qp->r_sge.sge.length = 0;
+ qp->r_sge.sge.sge_length = 0;
+ }
+ if (unlikely(!(qp->qp_access_flags &
+ IB_ACCESS_REMOTE_WRITE)))
+ goto nack_acc;
+ if (opcode == IB_OPCODE_RC_RDMA_WRITE_FIRST)
+ goto send_middle;
+ else if (opcode == IB_OPCODE_RC_RDMA_WRITE_ONLY)
+ goto send_last;
+ if (!ipath_get_rwqe(qp, 1))
+ goto rnr_nak;
+ goto send_last_imm;
+
+ case IB_OPCODE_RC_RDMA_READ_REQUEST:
+ /* RETH comes after BTH */
+ if (!has_grh)
+ reth = &ohdr->u.rc.reth;
+ else {
+ reth = (struct ib_reth *)data;
+ data += sizeof(*reth);
+ }
+ spin_lock(&qp->s_lock);
+ if (qp->s_ack_state != IB_OPCODE_RC_ACKNOWLEDGE &&
+ qp->s_ack_state >= IB_OPCODE_RDMA_READ_REQUEST) {
+ spin_unlock(&qp->s_lock);
+ goto done;
+ }
+ qp->s_rdma_len = be32_to_cpu(reth->length);
+ if (qp->s_rdma_len != 0) {
+ u32 rkey = be32_to_cpu(reth->rkey);
+ u64 vaddr = be64_to_cpu(reth->vaddr);
+
+ /* Check rkey & NAK */
+ if (unlikely(!ipath_rkey_ok(
+ dev, &qp->s_rdma_sge,
+ qp->s_rdma_len,
+ vaddr, rkey,
+ IB_ACCESS_REMOTE_READ))) {
+ spin_unlock(&qp->s_lock);
+ goto nack_acc;
+ }
+ /*
+ * Update the next expected PSN. We add 1 later
+ * below, so only add the remainder here.
+ */
+ if (qp->s_rdma_len > pmtu)
+ qp->r_psn += (qp->s_rdma_len - 1) / pmtu;
+ } else {
+ qp->s_rdma_sge.sg_list = NULL;
+ qp->s_rdma_sge.num_sge = 0;
+ qp->s_rdma_sge.sge.mr = NULL;
+ qp->s_rdma_sge.sge.vaddr = NULL;
+ qp->s_rdma_sge.sge.length = 0;
+ qp->s_rdma_sge.sge.sge_length = 0;
+ }
+ if (unlikely(!(qp->qp_access_flags &
+ IB_ACCESS_REMOTE_READ)))
+ goto nack_acc;
+ /*
+ * We need to increment the MSN here instead of when we
+ * finish sending the result since a duplicate request would
+ * increment it more than once.
+ */
+ atomic_inc(&qp->msn);
+ qp->s_ack_state = opcode;
+ qp->s_nak_state = 0;
+ qp->s_ack_psn = psn;
+ qp->r_psn++;
+ qp->r_state = opcode;
+ goto rdmadone;
+
+ case IB_OPCODE_RC_COMPARE_SWAP:
+ case IB_OPCODE_RC_FETCH_ADD:{
+ struct ib_atomic_eth *ateth;
+ u64 vaddr;
+ u64 sdata;
+ u32 rkey;
+
+ if (!has_grh)
+ ateth = &ohdr->u.atomic_eth;
+ else {
+ ateth = (struct ib_atomic_eth *)data;
+ data += sizeof(*ateth);
+ }
+ vaddr = be64_to_cpu(ateth->vaddr);
+ if (unlikely(vaddr & (sizeof(u64) - 1)))
+ goto nack_inv;
+ rkey = be32_to_cpu(ateth->rkey);
+ /* Check rkey & NAK */
+ if (unlikely(!ipath_rkey_ok(dev, &qp->r_sge,
+ sizeof(u64), vaddr, rkey,
+ IB_ACCESS_REMOTE_ATOMIC)))
+ goto nack_acc;
+ if (unlikely(!(qp->qp_access_flags &
+ IB_ACCESS_REMOTE_ATOMIC)))
+ goto nack_acc;
+ /* Perform atomic OP and save result. */
+ sdata = be64_to_cpu(ateth->swap_data);
+ spin_lock(&dev->pending_lock);
+ qp->r_atomic_data = *(u64 *) qp->r_sge.sge.vaddr;
+ if (opcode == IB_OPCODE_RC_FETCH_ADD)
+ *(u64 *) qp->r_sge.sge.vaddr =
+ qp->r_atomic_data + sdata;
+ else if (qp->r_atomic_data ==
+ be64_to_cpu(ateth->compare_data))
+ *(u64 *) qp->r_sge.sge.vaddr = sdata;
+ spin_unlock(&dev->pending_lock);
+ atomic_inc(&qp->msn);
+ qp->r_atomic_psn = psn & IPS_PSN_MASK;
+ psn |= 1 << 31;
+ break;
+ }
+
+ default:
+ /* Drop packet for unknown opcodes. */
+ spin_unlock_irqrestore(&qp->r_rq.lock, flags);
+ return;
+ }
+ qp->r_psn++;
+ qp->r_state = opcode;
+ /* Send an ACK if requested or required. */
+ if (psn & (1 << 31)) {
+ /*
+ * Coalesce ACKs unless there is a RDMA READ or
+ * ATOMIC pending.
+ */
+ spin_lock(&qp->s_lock);
+ if (qp->s_ack_state == IB_OPCODE_RC_ACKNOWLEDGE ||
+ qp->s_ack_state < IB_OPCODE_RDMA_READ_REQUEST) {
+ qp->s_ack_state = opcode;
+ qp->s_nak_state = 0;
+ qp->s_ack_psn = psn;
+ qp->s_ack_atomic = qp->r_atomic_data;
+ goto resched;
+ }
+ spin_unlock(&qp->s_lock);
+ }
+done:
+ spin_unlock_irqrestore(&qp->r_rq.lock, flags);
+ return;
+
+resched:
+ /*
+ * Try to send ACK right away but not if ipath_do_rc_send() is
+ * active.
+ */
+ if (qp->s_hdrwords == 0 &&
+ (qp->s_ack_state < IB_OPCODE_RDMA_READ_REQUEST ||
+ qp->s_ack_state >= IB_OPCODE_COMPARE_SWAP))
+ send_rc_ack(qp);
+
+rdmadone:
+ spin_unlock(&qp->s_lock);
+ spin_unlock_irqrestore(&qp->r_rq.lock, flags);
+
+ /* Call ipath_do_rc_send() in another thread. */
+ tasklet_hi_schedule(&qp->s_task);
+}
^ permalink raw reply [flat|nested] 70+ messages in thread* [PATCH 15 of 20] ipath - misc infiniband code, part 1
2006-03-10 0:35 [PATCH 0 of 20] [RFC] ipath driver - another round for review Bryan O'Sullivan
` (13 preceding siblings ...)
2006-03-10 0:35 ` [PATCH 14 of 20] ipath - infiniband RC " Bryan O'Sullivan
@ 2006-03-10 0:35 ` Bryan O'Sullivan
2006-03-10 0:35 ` [PATCH 16 of 20] ipath - misc infiniband code, part 2 Bryan O'Sullivan
` (5 subsequent siblings)
20 siblings, 0 replies; 70+ messages in thread
From: Bryan O'Sullivan @ 2006-03-10 0:35 UTC (permalink / raw)
To: rolandd, gregkh, akpm, davem; +Cc: linux-kernel, openib-general
Completion queues, local and remote memory keys, and memory region
support.
Signed-off-by: Bryan O'Sullivan <bos@pathscale.com>
diff -r 70e3edb0d82d -r 44cd07539d66 drivers/infiniband/hw/ipath/ipath_cq.c
--- /dev/null Thu Jan 1 00:00:00 1970 +0000
+++ b/drivers/infiniband/hw/ipath/ipath_cq.c Thu Mar 9 16:16:44 2006 -0800
@@ -0,0 +1,277 @@
+/*
+ * Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/err.h>
+#include <linux/vmalloc.h>
+
+#include "ipath_verbs.h"
+
+/**
+ * ipath_cq_enter - add a new entry to the completion queue
+ * @cq: completion queue
+ * @entry: work completion entry to add
+ * @sig: true if @entry is a solicitated entry
+ *
+ * This may be called with one of the qp->s_lock or qp->r_rq.lock held.
+ */
+void ipath_cq_enter(struct ipath_cq *cq, struct ib_wc *entry, int solicited)
+{
+ unsigned long flags;
+ u32 next;
+
+ spin_lock_irqsave(&cq->lock, flags);
+
+ if (cq->head == cq->ibcq.cqe)
+ next = 0;
+ else
+ next = cq->head + 1;
+ if (unlikely(next == cq->tail)) {
+ spin_unlock_irqrestore(&cq->lock, flags);
+ if (cq->ibcq.event_handler) {
+ struct ib_event ev;
+
+ ev.device = cq->ibcq.device;
+ ev.element.cq = &cq->ibcq;
+ ev.event = IB_EVENT_CQ_ERR;
+ cq->ibcq.event_handler(&ev, cq->ibcq.cq_context);
+ }
+ return;
+ }
+ cq->queue[cq->head] = *entry;
+ cq->head = next;
+
+ if (cq->notify == IB_CQ_NEXT_COMP ||
+ (cq->notify == IB_CQ_SOLICITED && solicited)) {
+ cq->notify = IB_CQ_NONE;
+ cq->triggered++;
+ /*
+ * This will cause send_complete() to be called in
+ * another thread.
+ */
+ tasklet_hi_schedule(&cq->comptask);
+ }
+
+ spin_unlock_irqrestore(&cq->lock, flags);
+
+ if (entry->status != IB_WC_SUCCESS)
+ to_idev(cq->ibcq.device)->n_wqe_errs++;
+}
+
+/**
+ * ipath_poll_cq - poll for work completion entries
+ * @ibcq: the completion queue to poll
+ * @num_entries: the maximum number of entries to return
+ * @entry: pointer to array where work completions are placed
+ *
+ * Returns the number of completion entries polled.
+ *
+ * This may be called from interrupt context. Also called by ib_poll_cq()
+ * in the generic verbs code.
+ */
+int ipath_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *entry)
+{
+ struct ipath_cq *cq = to_icq(ibcq);
+ unsigned long flags;
+ int npolled;
+
+ spin_lock_irqsave(&cq->lock, flags);
+
+ for (npolled = 0; npolled < num_entries; ++npolled, ++entry) {
+ if (cq->tail == cq->head)
+ break;
+ *entry = cq->queue[cq->tail];
+ if (cq->tail == cq->ibcq.cqe)
+ cq->tail = 0;
+ else
+ cq->tail++;
+ }
+
+ spin_unlock_irqrestore(&cq->lock, flags);
+
+ return npolled;
+}
+
+static void send_complete(unsigned long data)
+{
+ struct ipath_cq *cq = (struct ipath_cq *)data;
+
+ /*
+ * The completion handler will most likely rearm the notification
+ * and poll for all pending entries. If a new completion entry
+ * is added while we are in this routine, tasklet_hi_schedule()
+ * won't call us again until we return so we check triggered to
+ * see if we need to call the handler again.
+ */
+ for (;;) {
+ u8 triggered = cq->triggered;
+
+ cq->ibcq.comp_handler(&cq->ibcq, cq->ibcq.cq_context);
+
+ if (cq->triggered == triggered)
+ return;
+ }
+}
+
+/**
+ * ipath_create_cq - create a completion queue
+ * @ibdev: the device this completion queue is attached to
+ * @entries: the minimum size of the completion queue
+ * @context: unused by the InfiniPath driver
+ * @udata: unused by the InfiniPath driver
+ *
+ * Returns a pointer to the completion queue or negative errno values
+ * for failure.
+ *
+ * Called by ib_create_cq() in the generic verbs code.
+ */
+struct ib_cq *ipath_create_cq(struct ib_device *ibdev, int entries,
+ struct ib_ucontext *context,
+ struct ib_udata *udata)
+{
+ struct ipath_cq *cq;
+ struct ib_wc *wc;
+
+ /*
+ * Need to use vmalloc() if we want to support large #s of
+ * entries.
+ */
+ cq = vmalloc(sizeof(*cq));
+ if (!cq)
+ return ERR_PTR(-ENOMEM);
+
+ /* Need to use vmalloc() if we want to support large #s of entries. */
+ wc = vmalloc(sizeof(*wc) * (entries + 1));
+ if (!wc) {
+ kfree(cq);
+ return ERR_PTR(-ENOMEM);
+ }
+ /*
+ * ib_create_cq() will initialize cq->ibcq except for cq->ibcq.cqe.
+ * The number of entries should be >= the number requested or return
+ * an error.
+ */
+ cq->ibcq.cqe = entries;
+ cq->notify = IB_CQ_NONE;
+ cq->triggered = 0;
+ spin_lock_init(&cq->lock);
+ tasklet_init(&cq->comptask, send_complete, (unsigned long)cq);
+ cq->head = 0;
+ cq->tail = 0;
+ cq->queue = wc;
+
+ return &cq->ibcq;
+}
+
+/**
+ * ipath_destroy_cq - destroy a completion queue
+ * @ibcq: the completion queue to destroy.
+ *
+ * Returns 0 for success.
+ *
+ * Called by ib_destroy_cq() in the generic verbs code.
+ */
+int ipath_destroy_cq(struct ib_cq *ibcq)
+{
+ struct ipath_cq *cq = to_icq(ibcq);
+
+ tasklet_kill(&cq->comptask);
+ vfree(cq->queue);
+ kfree(cq);
+
+ return 0;
+}
+
+/**
+ * ipath_req_notify_cq - change the notification type for a completion queue
+ * @ibcq: the completion queue
+ * @notify: the type of notification to request
+ *
+ * Returns 0 for success.
+ *
+ * This may be called from interrupt context. Also called by
+ * ib_req_notify_cq() in the generic verbs code.
+ */
+int ipath_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify notify)
+{
+ struct ipath_cq *cq = to_icq(ibcq);
+ unsigned long flags;
+
+ spin_lock_irqsave(&cq->lock, flags);
+ /*
+ * Don't change IB_CQ_NEXT_COMP to IB_CQ_SOLICITED but allow
+ * any other transitions.
+ */
+ if (cq->notify != IB_CQ_NEXT_COMP)
+ cq->notify = notify;
+ spin_unlock_irqrestore(&cq->lock, flags);
+ return 0;
+}
+
+int ipath_resize_cq(struct ib_cq *ibcq, int cqe, struct ib_udata *udata)
+{
+ struct ipath_cq *cq = to_icq(ibcq);
+ struct ib_wc *wc, *old_wc;
+ u32 n;
+
+ /* Need to use vmalloc() if we want to support large #s of entries. */
+ wc = vmalloc(sizeof(*wc) * (cqe + 1));
+ if (!wc)
+ return -ENOMEM;
+
+ spin_lock_irq(&cq->lock);
+ if (cq->head < cq->tail)
+ n = cq->ibcq.cqe + 1 + cq->head - cq->tail;
+ else
+ n = cq->head - cq->tail;
+ if (unlikely((u32)cqe < n)) {
+ spin_unlock_irq(&cq->lock);
+ vfree(wc);
+ return -EOVERFLOW;
+ }
+ for (n = 0; cq->tail != cq->head; n++) {
+ wc[n] = cq->queue[cq->tail];
+ if (cq->tail == cq->ibcq.cqe)
+ cq->tail = 0;
+ else
+ cq->tail++;
+ }
+ cq->ibcq.cqe = cqe;
+ cq->head = n;
+ cq->tail = 0;
+ old_wc = cq->queue;
+ cq->queue = wc;
+ spin_unlock_irq(&cq->lock);
+
+ vfree(old_wc);
+
+ return 0;
+}
diff -r 70e3edb0d82d -r 44cd07539d66 drivers/infiniband/hw/ipath/ipath_keys.c
--- /dev/null Thu Jan 1 00:00:00 1970 +0000
+++ b/drivers/infiniband/hw/ipath/ipath_keys.c Thu Mar 9 16:16:44 2006 -0800
@@ -0,0 +1,212 @@
+/*
+ * Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <asm/io.h>
+
+#include "ipath_verbs.h"
+
+/**
+ * ipath_alloc_lkey - allocate an lkey
+ * @rkt: lkey table in which to allocate the lkey
+ * @mr: memory region that this lkey protects
+ *
+ * Returns 1 if successful, otherwise returns 0.
+ */
+
+int ipath_alloc_lkey(struct ipath_lkey_table *rkt, struct ipath_mregion *mr)
+{
+ unsigned long flags;
+ u32 r;
+ u32 n;
+
+ spin_lock_irqsave(&rkt->lock, flags);
+
+ /* Find the next available LKEY */
+ r = n = rkt->next;
+ for (;;) {
+ if (rkt->table[r] == NULL)
+ break;
+ r = (r + 1) & (rkt->max - 1);
+ if (r == n) {
+ spin_unlock_irqrestore(&rkt->lock, flags);
+ _VERBS_INFO("LKEY table full\n");
+ return 0;
+ }
+ }
+ rkt->next = (r + 1) & (rkt->max - 1);
+ /*
+ * Make sure lkey is never zero which is reserved to indicate an
+ * unrestricted LKEY.
+ */
+ rkt->gen++;
+ mr->lkey = (r << (32 - ib_ipath_lkey_table_size)) |
+ ((((1 << (24 - ib_ipath_lkey_table_size)) - 1) & rkt->gen)
+ << 8);
+ if (mr->lkey == 0) {
+ mr->lkey |= 1 << 8;
+ rkt->gen++;
+ }
+ rkt->table[r] = mr;
+ spin_unlock_irqrestore(&rkt->lock, flags);
+
+ return 1;
+}
+
+/**
+ * ipath_free_lkey - free an lkey
+ * @rkt: table from which to free the lkey
+ * @lkey: lkey id to free
+ */
+void ipath_free_lkey(struct ipath_lkey_table *rkt, u32 lkey)
+{
+ unsigned long flags;
+ u32 r;
+
+ if (lkey == 0)
+ return;
+ r = lkey >> (32 - ib_ipath_lkey_table_size);
+ spin_lock_irqsave(&rkt->lock, flags);
+ rkt->table[r] = NULL;
+ spin_unlock_irqrestore(&rkt->lock, flags);
+}
+
+/**
+ * ipath_lkey_ok - check IB SGE for validity and initialize
+ * @rkt: table containing lkey to check SGE against
+ * @isge: outgoing internal SGE
+ * @sge: SGE to check
+ * @acc: access flags
+ *
+ * Return 1 if valid and successful, otherwise returns 0.
+ *
+ * Check the IB SGE for validity and initialize our internal version
+ * of it.
+ */
+int ipath_lkey_ok(struct ipath_lkey_table *rkt, struct ipath_sge *isge,
+ struct ib_sge *sge, int acc)
+{
+ struct ipath_mregion *mr;
+ size_t off;
+
+ /*
+ * We use LKEY == zero to mean a physical kmalloc() address.
+ * This is a bit of a hack since we rely on dma_map_single()
+ * being reversible by calling bus_to_virt().
+ */
+ if (sge->lkey == 0) {
+ isge->mr = NULL;
+ isge->vaddr = bus_to_virt(sge->addr);
+ isge->length = sge->length;
+ isge->sge_length = sge->length;
+ return 1;
+ }
+ spin_lock(&rkt->lock);
+ mr = rkt->table[(sge->lkey >> (32 - ib_ipath_lkey_table_size))];
+ spin_unlock(&rkt->lock);
+ if (unlikely(mr == NULL || mr->lkey != sge->lkey))
+ return 0;
+
+ off = sge->addr - mr->user_base;
+ if (unlikely(sge->addr < mr->user_base ||
+ off + sge->length > mr->length ||
+ (mr->access_flags & acc) != acc))
+ return 0;
+
+ off += mr->offset;
+ isge->mr = mr;
+ isge->m = 0;
+ isge->n = 0;
+ while (off >= mr->map[isge->m]->segs[isge->n].length) {
+ off -= mr->map[isge->m]->segs[isge->n].length;
+ isge->n++;
+ if (isge->n >= IPATH_SEGSZ) {
+ isge->m++;
+ isge->n = 0;
+ }
+ }
+ isge->vaddr = mr->map[isge->m]->segs[isge->n].vaddr + off;
+ isge->length = mr->map[isge->m]->segs[isge->n].length - off;
+ isge->sge_length = sge->length;
+ return 1;
+}
+
+/**
+ * ipath_rkey_ok - check the IB virtual address, length, and RKEY
+ * @dev: infiniband device
+ * @ss: SGE state
+ * @len: length of data
+ * @vaddr: virtual address to place data
+ * @rkey: rkey to check
+ * @acc: access flags
+ *
+ * Return 1 if successful, otherwise 0.
+ *
+ * The QP r_rq.lock should be held.
+ */
+int ipath_rkey_ok(struct ipath_ibdev *dev, struct ipath_sge_state *ss,
+ u32 len, u64 vaddr, u32 rkey, int acc)
+{
+ struct ipath_lkey_table *rkt = &dev->lk_table;
+ struct ipath_sge *sge = &ss->sge;
+ struct ipath_mregion *mr;
+ size_t off;
+
+ spin_lock(&rkt->lock);
+ mr = rkt->table[(rkey >> (32 - ib_ipath_lkey_table_size))];
+ spin_unlock(&rkt->lock);
+ if (unlikely(mr == NULL || mr->lkey != rkey))
+ return 0;
+
+ off = vaddr - mr->iova;
+ if (unlikely(vaddr < mr->iova || off + len > mr->length ||
+ (mr->access_flags & acc) == 0))
+ return 0;
+
+ off += mr->offset;
+ sge->mr = mr;
+ sge->m = 0;
+ sge->n = 0;
+ while (off >= mr->map[sge->m]->segs[sge->n].length) {
+ off -= mr->map[sge->m]->segs[sge->n].length;
+ sge->n++;
+ if (sge->n >= IPATH_SEGSZ) {
+ sge->m++;
+ sge->n = 0;
+ }
+ }
+ sge->vaddr = mr->map[sge->m]->segs[sge->n].vaddr + off;
+ sge->length = mr->map[sge->m]->segs[sge->n].length - off;
+ sge->sge_length = len;
+ ss->sg_list = NULL;
+ ss->num_sge = 1;
+ return 1;
+}
diff -r 70e3edb0d82d -r 44cd07539d66 drivers/infiniband/hw/ipath/ipath_mr.c
--- /dev/null Thu Jan 1 00:00:00 1970 +0000
+++ b/drivers/infiniband/hw/ipath/ipath_mr.c Thu Mar 9 16:16:44 2006 -0800
@@ -0,0 +1,353 @@
+/*
+ * Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <rdma/ib_pack.h>
+#include <rdma/ib_smi.h>
+
+#include "ipath_verbs.h"
+
+/**
+ * ipath_get_dma_mr - get a DMA memory region
+ * @pd: protection domain for this memory region
+ * @acc: access flags
+ *
+ * Returns the memory region on success, otherwise returns an errno.
+ */
+struct ib_mr *ipath_get_dma_mr(struct ib_pd *pd, int acc)
+{
+ struct ipath_mr *mr;
+
+ mr = kzalloc(sizeof *mr, GFP_KERNEL);
+ if (!mr)
+ return ERR_PTR(-ENOMEM);
+
+ mr->mr.access_flags = acc;
+ return &mr->ibmr;
+}
+
+static struct ipath_mr *alloc_mr(int count,
+ struct ipath_lkey_table *lk_table)
+{
+ struct ipath_mr *mr;
+ int m, i = 0;
+
+ /* Allocate struct plus pointers to first level page tables. */
+ m = (count + IPATH_SEGSZ - 1) / IPATH_SEGSZ;
+ mr = kmalloc(sizeof *mr + m * sizeof mr->mr.map[0], GFP_KERNEL);
+ if (!mr)
+ goto done;
+
+ /* Allocate first level page tables. */
+ for (; i < m; i++) {
+ mr->mr.map[i] = kmalloc(sizeof *mr->mr.map[0], GFP_KERNEL);
+ if (!mr->mr.map[i])
+ goto bail;
+ }
+ mr->mr.mapsz = m;
+
+ /*
+ * ib_reg_phys_mr() will initialize mr->ibmr except for
+ * lkey and rkey.
+ */
+ if (!ipath_alloc_lkey(lk_table, &mr->mr))
+ goto bail;
+ mr->ibmr.rkey = mr->ibmr.lkey = mr->mr.lkey;
+
+ goto done;
+
+bail:
+ while (i) {
+ i--;
+ kfree(mr->mr.map[i]);
+ }
+ kfree(mr);
+ mr = NULL;
+
+done:
+ return mr;
+}
+
+/**
+ * ipath_reg_phys_mr - register a physical memory region
+ * @pd: protection domain for this memory region
+ * @buffer_list: pointer to the list of physical buffers to register
+ * @num_phys_buf: the number of physical buffers to register
+ * @iova_start: the starting address passed over IB which maps to this MR
+ *
+ * Returns the memory region on success, otherwise returns an errno.
+ */
+struct ib_mr *ipath_reg_phys_mr(struct ib_pd *pd,
+ struct ib_phys_buf *buffer_list,
+ int num_phys_buf, int acc, u64 *iova_start)
+{
+ struct ipath_mr *mr;
+ int n, m, i;
+
+ mr = alloc_mr(num_phys_buf, &to_idev(pd->device)->lk_table);
+ if (mr == NULL)
+ return ERR_PTR(-ENOMEM);
+
+ mr->mr.user_base = *iova_start;
+ mr->mr.iova = *iova_start;
+ mr->mr.length = 0;
+ mr->mr.offset = 0;
+ mr->mr.access_flags = acc;
+ mr->mr.max_segs = num_phys_buf;
+
+ m = 0;
+ n = 0;
+ for (i = 0; i < num_phys_buf; i++) {
+ mr->mr.map[m]->segs[n].vaddr =
+ phys_to_virt(buffer_list[i].addr);
+ mr->mr.map[m]->segs[n].length = buffer_list[i].size;
+ mr->mr.length += buffer_list[i].size;
+ n++;
+ if (n == IPATH_SEGSZ) {
+ m++;
+ n = 0;
+ }
+ }
+
+ return &mr->ibmr;
+}
+
+/**
+ * ipath_reg_user_mr - register a userspace memory region
+ * @pd: protection domain for this memory region
+ * @region: the user memory region
+ * @mr_access_flags: access flags for this memory region
+ * @udata: unused by the InfiniPath driver
+ *
+ * Returns the memory region on success, otherwise returns an errno.
+ */
+struct ib_mr *ipath_reg_user_mr(struct ib_pd *pd, struct ib_umem *region,
+ int mr_access_flags, struct ib_udata *udata)
+{
+ struct ipath_mr *mr;
+ struct ib_umem_chunk *chunk;
+ int n, m, i;
+
+ n = 0;
+ list_for_each_entry(chunk, ®ion->chunk_list, list)
+ n += chunk->nents;
+
+ mr = alloc_mr(n, &to_idev(pd->device)->lk_table);
+ if (!mr)
+ return ERR_PTR(-ENOMEM);
+
+ mr->mr.user_base = region->user_base;
+ mr->mr.iova = region->virt_base;
+ mr->mr.length = region->length;
+ mr->mr.offset = region->offset;
+ mr->mr.access_flags = mr_access_flags;
+ mr->mr.max_segs = n;
+
+ m = 0;
+ n = 0;
+ list_for_each_entry(chunk, ®ion->chunk_list, list) {
+ for (i = 0; i < chunk->nmap; i++) {
+ mr->mr.map[m]->segs[n].vaddr =
+ page_address(chunk->page_list[i].page);
+ mr->mr.map[m]->segs[n].length = region->page_size;
+ n++;
+ if (n == IPATH_SEGSZ) {
+ m++;
+ n = 0;
+ }
+ }
+ }
+ return &mr->ibmr;
+}
+
+/**
+ * ipath_dereg_mr - unregister and free a memory region
+ * @ibmr: the memory region to free
+ *
+ * Returns 0 on success.
+ *
+ * Note that this is called to free MRs created by ipath_get_dma_mr()
+ * or ipath_reg_user_mr().
+ */
+int ipath_dereg_mr(struct ib_mr *ibmr)
+{
+ struct ipath_mr *mr = to_imr(ibmr);
+ int i;
+
+ ipath_free_lkey(&to_idev(ibmr->device)->lk_table, ibmr->lkey);
+ i = mr->mr.mapsz;
+ while (i) {
+ i--;
+ kfree(mr->mr.map[i]);
+ }
+ kfree(mr);
+ return 0;
+}
+
+/**
+ * ipath_alloc_fmr - allocate a fast memory region
+ * @pd: the protection domain for this memory region
+ * @mr_access_flags: access flags for this memory region
+ * @fmr_attr: fast memory region attributes
+ *
+ * Returns the memory region on success, otherwise returns an errno.
+ */
+struct ib_fmr *ipath_alloc_fmr(struct ib_pd *pd, int mr_access_flags,
+ struct ib_fmr_attr *fmr_attr)
+{
+ struct ipath_fmr *fmr;
+ int m, i = 0;
+
+ /* Allocate struct plus pointers to first level page tables. */
+ m = (fmr_attr->max_pages + IPATH_SEGSZ - 1) / IPATH_SEGSZ;
+ fmr = kmalloc(sizeof *fmr + m * sizeof fmr->mr.map[0], GFP_KERNEL);
+ if (!fmr)
+ goto bail;
+
+ /* Allocate first level page tables. */
+ for (; i < m; i++) {
+ fmr->mr.map[i] = kmalloc(sizeof *fmr->mr.map[0],
+ GFP_KERNEL);
+ if (!fmr->mr.map[i])
+ goto bail;
+ }
+ fmr->mr.mapsz = m;
+
+ /*
+ * ib_alloc_fmr() will initialize fmr->ibfmr except for lkey &
+ * rkey.
+ */
+ if (!ipath_alloc_lkey(&to_idev(pd->device)->lk_table, &fmr->mr))
+ goto bail;
+ fmr->ibfmr.rkey = fmr->ibfmr.lkey = fmr->mr.lkey;
+ /*
+ * Resources are allocated but no valid mapping (RKEY can't be
+ * used).
+ */
+ fmr->mr.user_base = 0;
+ fmr->mr.iova = 0;
+ fmr->mr.length = 0;
+ fmr->mr.offset = 0;
+ fmr->mr.access_flags = mr_access_flags;
+ fmr->mr.max_segs = fmr_attr->max_pages;
+ fmr->page_shift = fmr_attr->page_shift;
+
+ return &fmr->ibfmr;
+bail:
+ while (i)
+ kfree(fmr->mr.map[--i]);
+ kfree(fmr);
+ return ERR_PTR(-ENOMEM);
+}
+
+/**
+ * ipath_map_phys_fmr - set up a fast memory region
+ * @ibmfr: the fast memory region to set up
+ * @page_list: the list of pages to associate with the fast memory region
+ * @list_len: the number of pages to associate with the fast memory region
+ * @iova: the virtual address of the start of the fast memory region
+ *
+ * This may be called from interrupt context.
+ */
+
+int ipath_map_phys_fmr(struct ib_fmr *ibfmr, u64 * page_list,
+ int list_len, u64 iova)
+{
+ struct ipath_fmr *fmr = to_ifmr(ibfmr);
+ struct ipath_lkey_table *rkt;
+ unsigned long flags;
+ int m, n, i;
+ u32 ps;
+
+ if (list_len > fmr->mr.max_segs)
+ return -EINVAL;
+ rkt = &to_idev(ibfmr->device)->lk_table;
+ spin_lock_irqsave(&rkt->lock, flags);
+ fmr->mr.user_base = iova;
+ fmr->mr.iova = iova;
+ ps = 1 << fmr->page_shift;
+ fmr->mr.length = list_len * ps;
+ m = 0;
+ n = 0;
+ ps = 1 << fmr->page_shift;
+ for (i = 0; i < list_len; i++) {
+ fmr->mr.map[m]->segs[n].vaddr = phys_to_virt(page_list[i]);
+ fmr->mr.map[m]->segs[n].length = ps;
+ if (++n == IPATH_SEGSZ) {
+ m++;
+ n = 0;
+ }
+ }
+ spin_unlock_irqrestore(&rkt->lock, flags);
+ return 0;
+}
+
+/**
+ * ipath_unmap_fmr - unmap fast memory regions
+ * @fmr_list: the list of fast memory regions to unmap
+ *
+ * Returns 0 on success.
+ */
+int ipath_unmap_fmr(struct list_head *fmr_list)
+{
+ struct ipath_fmr *fmr;
+ struct ipath_lkey_table *rkt;
+ unsigned long flags;
+
+ list_for_each_entry(fmr, fmr_list, ibfmr.list) {
+ rkt = &to_idev(fmr->ibfmr.device)->lk_table;
+ spin_lock_irqsave(&rkt->lock, flags);
+ fmr->mr.user_base = 0;
+ fmr->mr.iova = 0;
+ fmr->mr.length = 0;
+ spin_unlock_irqrestore(&rkt->lock, flags);
+ }
+ return 0;
+}
+
+/**
+ * ipath_dealloc_fmr - deallocate a fast memory region
+ * @ibfmr: the fast memory region to deallocate
+ *
+ * Returns 0 on success.
+ */
+int ipath_dealloc_fmr(struct ib_fmr *ibfmr)
+{
+ struct ipath_fmr *fmr = to_ifmr(ibfmr);
+ int i;
+
+ ipath_free_lkey(&to_idev(ibfmr->device)->lk_table, ibfmr->lkey);
+ i = fmr->mr.mapsz;
+ while (i)
+ kfree(fmr->mr.map[--i]);
+ kfree(fmr);
+ return 0;
+}
diff -r 70e3edb0d82d -r 44cd07539d66 drivers/infiniband/hw/ipath/ipath_srq.c
--- /dev/null Thu Jan 1 00:00:00 1970 +0000
+++ b/drivers/infiniband/hw/ipath/ipath_srq.c Thu Mar 9 16:16:44 2006 -0800
@@ -0,0 +1,246 @@
+/*
+ * Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/err.h>
+#include <linux/vmalloc.h>
+
+#include "ipath_verbs.h"
+
+/**
+ * ipath_post_srq_receive - post a receive on a shared receive queue
+ * @ibsrq: the SRQ to post the receive on
+ * @wr: the list of work requests to post
+ * @bad_wr: the first WR to cause a problem is put here
+ *
+ * This may be called from interrupt context.
+ */
+int ipath_post_srq_receive(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
+ struct ib_recv_wr **bad_wr)
+{
+ struct ipath_srq *srq = to_isrq(ibsrq);
+ struct ipath_ibdev *dev = to_idev(ibsrq->device);
+ unsigned long flags;
+
+ for (; wr; wr = wr->next) {
+ struct ipath_rwqe *wqe;
+ u32 next;
+ int i, j;
+
+ if (wr->num_sge > srq->rq.max_sge) {
+ *bad_wr = wr;
+ return -ENOMEM;
+ }
+
+ spin_lock_irqsave(&srq->rq.lock, flags);
+ next = srq->rq.head + 1;
+ if (next >= srq->rq.size)
+ next = 0;
+ if (next == srq->rq.tail) {
+ spin_unlock_irqrestore(&srq->rq.lock, flags);
+ *bad_wr = wr;
+ return -ENOMEM;
+ }
+
+ wqe = get_rwqe_ptr(&srq->rq, srq->rq.head);
+ wqe->wr_id = wr->wr_id;
+ wqe->sg_list[0].mr = NULL;
+ wqe->sg_list[0].vaddr = NULL;
+ wqe->sg_list[0].length = 0;
+ wqe->sg_list[0].sge_length = 0;
+ wqe->length = 0;
+ for (i = 0, j = 0; i < wr->num_sge; i++) {
+ /* Check LKEY */
+ if (to_ipd(srq->ibsrq.pd)->user &&
+ wr->sg_list[i].lkey == 0) {
+ spin_unlock_irqrestore(&srq->rq.lock,
+ flags);
+ *bad_wr = wr;
+ return -EINVAL;
+ }
+ if (wr->sg_list[i].length == 0)
+ continue;
+ if (!ipath_lkey_ok(&dev->lk_table,
+ &wqe->sg_list[j],
+ &wr->sg_list[i],
+ IB_ACCESS_LOCAL_WRITE)) {
+ spin_unlock_irqrestore(&srq->rq.lock,
+ flags);
+ *bad_wr = wr;
+ return -EINVAL;
+ }
+ wqe->length += wr->sg_list[i].length;
+ j++;
+ }
+ wqe->num_sge = j;
+ srq->rq.head = next;
+ spin_unlock_irqrestore(&srq->rq.lock, flags);
+ }
+ return 0;
+}
+
+/**
+ * ipath_create_srq - create a shared receive queue
+ * @ibpd: the protection domain of the SRQ to create
+ * @attr: the attributes of the SRQ
+ * @udata: not used by the InfiniPath verbs driver
+ */
+struct ib_srq *ipath_create_srq(struct ib_pd *ibpd,
+ struct ib_srq_init_attr *srq_init_attr,
+ struct ib_udata *udata)
+{
+ struct ipath_srq *srq;
+ u32 sz;
+
+ if (srq_init_attr->attr.max_sge < 1)
+ return ERR_PTR(-EINVAL);
+
+ srq = kmalloc(sizeof(*srq), GFP_KERNEL);
+ if (!srq)
+ return ERR_PTR(-ENOMEM);
+
+ /*
+ * Need to use vmalloc() if we want to support large #s of entries.
+ */
+ srq->rq.size = srq_init_attr->attr.max_wr + 1;
+ sz = sizeof(struct ipath_sge) * srq_init_attr->attr.max_sge +
+ sizeof(struct ipath_rwqe);
+ srq->rq.wq = vmalloc(srq->rq.size * sz);
+ if (!srq->rq.wq) {
+ kfree(srq);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ /*
+ * ib_create_srq() will initialize srq->ibsrq.
+ */
+ spin_lock_init(&srq->rq.lock);
+ srq->rq.head = 0;
+ srq->rq.tail = 0;
+ srq->rq.max_sge = srq_init_attr->attr.max_sge;
+ srq->limit = srq_init_attr->attr.srq_limit;
+
+ return &srq->ibsrq;
+}
+
+/**
+ * ipath_modify_srq - modify a shared receive queue
+ * @ibsrq: the SRQ to modify
+ * @attr: the new attributes of the SRQ
+ * @attr_mask: indicates which attributes to modify
+ */
+int ipath_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
+ enum ib_srq_attr_mask attr_mask)
+{
+ struct ipath_srq *srq = to_isrq(ibsrq);
+ unsigned long flags;
+
+ if (attr_mask & IB_SRQ_LIMIT) {
+ spin_lock_irqsave(&srq->rq.lock, flags);
+ srq->limit = attr->srq_limit;
+ spin_unlock_irqrestore(&srq->rq.lock, flags);
+ }
+ if (attr_mask & IB_SRQ_MAX_WR) {
+ u32 size = attr->max_wr + 1;
+ struct ipath_rwqe *wq, *p;
+ u32 n;
+ u32 sz;
+
+ if (attr->max_sge < srq->rq.max_sge)
+ return -EINVAL;
+
+ sz = sizeof(struct ipath_rwqe) +
+ attr->max_sge * sizeof(struct ipath_sge);
+ wq = vmalloc(size * sz);
+ if (!wq)
+ return -ENOMEM;
+
+ spin_lock_irqsave(&srq->rq.lock, flags);
+ if (srq->rq.head < srq->rq.tail)
+ n = srq->rq.size + srq->rq.head - srq->rq.tail;
+ else
+ n = srq->rq.head - srq->rq.tail;
+ if (size <= n || size <= srq->limit) {
+ spin_unlock_irqrestore(&srq->rq.lock, flags);
+ vfree(wq);
+ return -EINVAL;
+ }
+ n = 0;
+ p = wq;
+ while (srq->rq.tail != srq->rq.head) {
+ struct ipath_rwqe *wqe;
+ int i;
+
+ wqe = get_rwqe_ptr(&srq->rq, srq->rq.tail);
+ p->wr_id = wqe->wr_id;
+ p->length = wqe->length;
+ p->num_sge = wqe->num_sge;
+ for (i = 0; i < wqe->num_sge; i++)
+ p->sg_list[i] = wqe->sg_list[i];
+ n++;
+ p = (struct ipath_rwqe *)((char *) p + sz);
+ if (++srq->rq.tail >= srq->rq.size)
+ srq->rq.tail = 0;
+ }
+ vfree(srq->rq.wq);
+ srq->rq.wq = wq;
+ srq->rq.size = size;
+ srq->rq.head = n;
+ srq->rq.tail = 0;
+ srq->rq.max_sge = attr->max_sge;
+ spin_unlock_irqrestore(&srq->rq.lock, flags);
+ }
+ return 0;
+}
+
+int ipath_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr)
+{
+ struct ipath_srq *srq = to_isrq(ibsrq);
+
+ attr->max_wr = srq->rq.size - 1;
+ attr->max_sge = srq->rq.max_sge;
+ attr->srq_limit = srq->limit;
+ return 0;
+}
+
+/**
+ * ipath_destroy_srq - destroy a shared receive queue
+ * @ibsrq: the SRQ to destroy
+ */
+int ipath_destroy_srq(struct ib_srq *ibsrq)
+{
+ struct ipath_srq *srq = to_isrq(ibsrq);
+
+ vfree(srq->rq.wq);
+ kfree(srq);
+
+ return 0;
+}
^ permalink raw reply [flat|nested] 70+ messages in thread* [PATCH 16 of 20] ipath - misc infiniband code, part 2
2006-03-10 0:35 [PATCH 0 of 20] [RFC] ipath driver - another round for review Bryan O'Sullivan
` (14 preceding siblings ...)
2006-03-10 0:35 ` [PATCH 15 of 20] ipath - misc infiniband code, part 1 Bryan O'Sullivan
@ 2006-03-10 0:35 ` Bryan O'Sullivan
2006-03-10 0:35 ` [PATCH 17 of 20] ipath - infiniband verbs support Bryan O'Sullivan
` (4 subsequent siblings)
20 siblings, 0 replies; 70+ messages in thread
From: Bryan O'Sullivan @ 2006-03-10 0:35 UTC (permalink / raw)
To: rolandd, gregkh, akpm, davem; +Cc: linux-kernel, openib-general
Management datagram support, queue pairs, and reliable and unreliable
connections.
Signed-off-by: Bryan O'Sullivan <bos@pathscale.com>
diff -r 44cd07539d66 -r f57c24166c57 drivers/infiniband/hw/ipath/ipath_mad.c
--- /dev/null Thu Jan 1 00:00:00 1970 +0000
+++ b/drivers/infiniband/hw/ipath/ipath_mad.c Thu Mar 9 16:16:51 2006 -0800
@@ -0,0 +1,1295 @@
+/*
+ * Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <rdma/ib_smi.h>
+
+#include "ipath_kernel.h"
+#include "ipath_verbs.h"
+#include "ips_common.h"
+
+#define IB_SMP_UNSUP_VERSION __constant_htons(0x0004)
+#define IB_SMP_UNSUP_METHOD __constant_htons(0x0008)
+#define IB_SMP_UNSUP_METH_ATTR __constant_htons(0x000C)
+#define IB_SMP_INVALID_FIELD __constant_htons(0x001C)
+
+static int reply(struct ib_smp *smp)
+{
+ /*
+ * The verbs framework will handle the directed/LID route
+ * packet changes.
+ */
+ smp->method = IB_MGMT_METHOD_GET_RESP;
+ if (smp->mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
+ smp->status |= IB_SMP_DIRECTION;
+ return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
+}
+
+static inline int recv_subn_get_nodedescription(struct ib_smp *smp,
+ struct ib_device *ibdev)
+{
+ if (smp->attr_mod)
+ smp->status |= IB_SMP_INVALID_FIELD;
+
+ strncpy(smp->data, ibdev->node_desc, sizeof(smp->data));
+
+ return reply(smp);
+}
+
+struct nodeinfo {
+ u8 base_version;
+ u8 class_version;
+ u8 node_type;
+ u8 num_ports;
+ __be64 sys_guid;
+ __be64 node_guid;
+ __be64 port_guid;
+ __be16 partition_cap;
+ __be16 device_id;
+ __be32 revision;
+ u8 local_port_num;
+ u8 vendor_id[3];
+} __attribute__ ((packed));
+
+static inline int recv_subn_get_nodeinfo(struct ib_smp *smp,
+ struct ib_device *ibdev, u8 port)
+{
+ struct nodeinfo *nip = (struct nodeinfo *)&smp->data;
+ struct ipath_devdata *dd = to_idev(ibdev)->dd;
+ u32 vendor, boardid, majrev, minrev;
+
+ if (smp->attr_mod)
+ smp->status |= IB_SMP_INVALID_FIELD;
+
+ nip->base_version = 1;
+ nip->class_version = 1;
+ nip->node_type = 1; /* channel adapter */
+ /*
+ * XXX The num_ports value will need a layer function to get
+ * the value if we ever have more than one IB port on a chip.
+ * We will also need to get the GUID for the port.
+ */
+ nip->num_ports = ibdev->phys_port_cnt;
+ /* This is already in network order */
+ nip->sys_guid = to_idev(ibdev)->sys_image_guid;
+ nip->node_guid = ipath_layer_get_guid(dd);
+ nip->port_guid = nip->sys_guid;
+ nip->partition_cap = cpu_to_be16(ipath_layer_get_npkeys(dd));
+ nip->device_id = cpu_to_be16(ipath_layer_get_deviceid(dd));
+ ipath_layer_query_device(dd, &vendor, &boardid, &majrev, &minrev);
+ nip->revision = cpu_to_be32((majrev << 16) | minrev);
+ nip->local_port_num = port;
+ nip->vendor_id[0] = 0;
+ nip->vendor_id[1] = vendor >> 8;
+ nip->vendor_id[2] = vendor;
+
+ return reply(smp);
+}
+
+static int recv_subn_get_guidinfo(struct ib_smp *smp,
+ struct ib_device *ibdev)
+{
+ u32 startgx = 8 * be32_to_cpu(smp->attr_mod);
+ u64 *p = (u64 *) smp->data;
+
+ /* 32 blocks of 8 64-bit GUIDs per block */
+
+ memset(smp->data, 0, sizeof(smp->data));
+
+ /*
+ * We only support one GUID for now. If this changes, the
+ * portinfo.guid_cap field needs to be updated too.
+ */
+ if (startgx == 0)
+ /* The first is a copy of the read-only HW GUID. */
+ *p = ipath_layer_get_guid(to_idev(ibdev)->dd);
+ else
+ smp->status |= IB_SMP_INVALID_FIELD;
+
+ return reply(smp);
+}
+
+struct port_info {
+ __be64 mkey;
+ __be64 gid_prefix;
+ __be16 lid;
+ __be16 sm_lid;
+ __be32 cap_mask;
+ __be16 diag_code;
+ __be16 mkey_lease_period;
+ u8 local_port_num;
+ u8 link_width_enabled;
+ u8 link_width_supported;
+ u8 link_width_active;
+ u8 linkspeed_portstate; /* 4 bits, 4 bits */
+ u8 portphysstate_linkdown; /* 4 bits, 4 bits */
+ u8 mkeyprot_resv_lmc; /* 2 bits, 3, 3 */
+ u8 linkspeedactive_enabled; /* 4 bits, 4 bits */
+ u8 neighbormtu_mastersmsl; /* 4 bits, 4 bits */
+ u8 vlcap_inittype; /* 4 bits, 4 bits */
+ u8 vl_high_limit;
+ u8 vl_arb_high_cap;
+ u8 vl_arb_low_cap;
+ u8 inittypereply_mtucap; /* 4 bits, 4 bits */
+ u8 vlstallcnt_hoqlife; /* 3 bits, 5 bits */
+ u8 operationalvl_pei_peo_fpi_fpo; /* 4 bits, 1, 1, 1, 1 */
+ __be16 mkey_violations;
+ __be16 pkey_violations;
+ __be16 qkey_violations;
+ u8 guid_cap;
+ u8 clientrereg_resv_subnetto; /* 1 bit, 2 bits, 5 */
+ u8 resv_resptimevalue; /* 3 bits, 5 bits */
+ u8 localphyerrors_overrunerrors; /* 4 bits, 4 bits */
+ __be16 max_credit_hint;
+ u8 resv;
+ u8 link_roundtrip_latency[3];
+} __attribute__ ((packed));
+
+static int recv_subn_get_portinfo(struct ib_smp *smp,
+ struct ib_device *ibdev, u8 port)
+{
+ struct ipath_ibdev *dev;
+ struct port_info *pip = (struct port_info *)smp->data;
+ u16 lid;
+ u8 ibcstat;
+ u8 mtu;
+
+ if (be32_to_cpu(smp->attr_mod) > ibdev->phys_port_cnt) {
+ smp->status |= IB_SMP_INVALID_FIELD;
+ return reply(smp);
+ }
+
+ dev = to_idev(ibdev);
+
+ /* Clear all fields. Only set the non-zero fields. */
+ memset(smp->data, 0, sizeof(smp->data));
+
+ /* Only return the mkey if the protection field allows it. */
+ if (smp->method == IB_MGMT_METHOD_SET || dev->mkey == smp->mkey ||
+ (dev->mkeyprot_resv_lmc >> 6) == 0)
+ pip->mkey = dev->mkey;
+ pip->gid_prefix = dev->gid_prefix;
+ lid = ipath_layer_get_lid(dev->dd);
+ pip->lid = lid ? cpu_to_be16(lid) : IB_LID_PERMISSIVE;
+ pip->sm_lid = cpu_to_be16(dev->sm_lid);
+ pip->cap_mask = cpu_to_be32(dev->port_cap_flags);
+ /* pip->diag_code; */
+ pip->mkey_lease_period = cpu_to_be16(dev->mkey_lease_period);
+ pip->local_port_num = port;
+ pip->link_width_enabled = dev->link_width_enabled;
+ pip->link_width_supported = 3; /* 1x or 4x */
+ pip->link_width_active = 2; /* 4x */
+ pip->linkspeed_portstate = 0x10; /* 2.5Gbps */
+ ibcstat = ipath_layer_get_lastibcstat(dev->dd);
+ pip->linkspeed_portstate |= ((ibcstat >> 4) & 0x3) + 1;
+ pip->portphysstate_linkdown =
+ (ipath_cvt_physportstate[ibcstat & 0xf] << 4) |
+ (ipath_layer_get_linkdowndefaultstate(dev->dd) ? 1 : 2);
+ pip->mkeyprot_resv_lmc = dev->mkeyprot_resv_lmc;
+ pip->linkspeedactive_enabled = 0x11; /* 2.5Gbps, 2.5Gbps */
+ switch (ipath_layer_get_ibmtu(dev->dd)) {
+ case 4096:
+ mtu = IB_MTU_4096;
+ break;
+ case 2048:
+ mtu = IB_MTU_2048;
+ break;
+ case 1024:
+ mtu = IB_MTU_1024;
+ break;
+ case 512:
+ mtu = IB_MTU_512;
+ break;
+ case 256:
+ mtu = IB_MTU_256;
+ break;
+ default: /* oops, something is wrong */
+ mtu = IB_MTU_2048;
+ break;
+ }
+ pip->neighbormtu_mastersmsl = (mtu << 4) | dev->sm_sl;
+ pip->vlcap_inittype = 0x10; /* VLCap = VL0, InitType = 0 */
+ /* pip->vl_high_limit; // only one VL */
+ /* pip->vl_arb_high_cap; // only one VL */
+ /* pip->vl_arb_low_cap; // only one VL */
+ /* InitTypeReply = 0 */
+ pip->inittypereply_mtucap = IB_MTU_4096;
+ // HCAs ignore VLStallCount and HOQLife
+ /* pip->vlstallcnt_hoqlife; */
+ pip->operationalvl_pei_peo_fpi_fpo = 0x10; /* OVLs = 1 */
+ pip->mkey_violations = cpu_to_be16(dev->mkey_violations);
+ /* P_KeyViolations are counted by hardware. */
+ pip->pkey_violations =
+ cpu_to_be16((ipath_layer_get_cr_errpkey(dev->dd) -
+ dev->n_pkey_violations) & 0xFFFF);
+ pip->qkey_violations = cpu_to_be16(dev->qkey_violations);
+ /* Only the hardware GUID is supported for now */
+ pip->guid_cap = 1;
+ pip->clientrereg_resv_subnetto = dev->subnet_timeout;
+ /* 32.768 usec. response time (guessing) */
+ pip->resv_resptimevalue = 3;
+ pip->localphyerrors_overrunerrors =
+ (ipath_layer_get_phyerrthreshold(dev->dd) << 4) |
+ ipath_layer_get_overrunthreshold(dev->dd);
+ /* pip->max_credit_hint; */
+ /* pip->link_roundtrip_latency[3]; */
+
+ return reply(smp);
+}
+
+static int recv_subn_get_pkeytable(struct ib_smp *smp,
+ struct ib_device *ibdev)
+{
+ u32 startpx = 32 * (be32_to_cpu(smp->attr_mod) & 0xffff);
+ u16 *p = (u16 *) smp->data;
+
+ /* 64 blocks of 32 16-bit P_Key entries */
+
+ memset(smp->data, 0, sizeof(smp->data));
+ if (startpx == 0) {
+ struct ipath_ibdev *dev = to_idev(ibdev);
+ unsigned i, n = ipath_layer_get_npkeys(dev->dd);
+
+ ipath_layer_get_pkeys(dev->dd, p);
+
+ for (i = 0; i < n; i++)
+ p[i] = cpu_to_be16(p[i]);
+ } else
+ smp->status |= IB_SMP_INVALID_FIELD;
+
+ return reply(smp);
+}
+
+static inline int recv_subn_set_guidinfo(struct ib_smp *smp,
+ struct ib_device *ibdev)
+{
+ /* The only GUID we support is the first read-only entry. */
+ return recv_subn_get_guidinfo(smp, ibdev);
+}
+
+/**
+ * recv_subn_set_portinfo - set port information
+ * @smp: the incoming SM packet
+ * @ibdev: the infiniband device
+ * @port: the port on the device
+ *
+ * Set Portinfo (see ch. 14.2.5.6).
+ */
+static inline int recv_subn_set_portinfo(struct ib_smp *smp,
+ struct ib_device *ibdev, u8 port)
+{
+ struct port_info *pip = (struct port_info *)smp->data;
+ struct ib_event event;
+ struct ipath_ibdev *dev;
+ u32 flags;
+ char clientrereg = 0;
+ u16 lid, smlid;
+ u8 lwe;
+ u8 lse;
+ u8 state;
+ u16 lstate;
+ u32 mtu;
+ int ret;
+
+ if (be32_to_cpu(smp->attr_mod) > ibdev->phys_port_cnt)
+ goto err;
+
+ dev = to_idev(ibdev);
+ event.device = ibdev;
+ event.element.port_num = port;
+
+ dev->mkey = pip->mkey;
+ dev->gid_prefix = pip->gid_prefix;
+ dev->mkey_lease_period = be16_to_cpu(pip->mkey_lease_period);
+
+ lid = be16_to_cpu(pip->lid);
+ if (lid != ipath_layer_get_lid(dev->dd)) {
+ /* Must be a valid unicast LID address. */
+ if (lid == 0 || lid >= IPS_MULTICAST_LID_BASE)
+ goto err;
+ ipath_set_sps_lid(dev->dd, lid, pip->mkeyprot_resv_lmc & 7);
+ event.event = IB_EVENT_LID_CHANGE;
+ ib_dispatch_event(&event);
+ }
+
+ smlid = be16_to_cpu(pip->sm_lid);
+ if (smlid != dev->sm_lid) {
+ /* Must be a valid unicast LID address. */
+ if (smlid == 0 || smlid >= IPS_MULTICAST_LID_BASE)
+ goto err;
+ dev->sm_lid = smlid;
+ event.event = IB_EVENT_SM_CHANGE;
+ ib_dispatch_event(&event);
+ }
+
+ /* Only 4x supported but allow 1x or 4x to be set (see 14.2.6.6). */
+ lwe = pip->link_width_enabled;
+ if ((lwe >= 4 && lwe <= 8) || (lwe >= 0xC && lwe <= 0xFE))
+ goto err;
+ if (lwe == 0xFF)
+ dev->link_width_enabled = 3; /* 1x or 4x */
+ else if (lwe)
+ dev->link_width_enabled = lwe;
+
+ /* Only 2.5 Gbs supported. */
+ lse = pip->linkspeedactive_enabled & 0xF;
+ if (lse >= 2 && lse <= 0xE)
+ goto err;
+
+ /* Set link down default state. */
+ switch (pip->portphysstate_linkdown & 0xF) {
+ case 0: /* NOP */
+ break;
+ case 1: /* SLEEP */
+ if (ipath_layer_set_linkdowndefaultstate(dev->dd, 1))
+ goto err;
+ break;
+ case 2: /* POLL */
+ if (ipath_layer_set_linkdowndefaultstate(dev->dd, 0))
+ goto err;
+ break;
+ default:
+ goto err;
+ }
+
+ dev->mkeyprot_resv_lmc = pip->mkeyprot_resv_lmc;
+
+ switch ((pip->neighbormtu_mastersmsl >> 4) & 0xF) {
+ case IB_MTU_256:
+ mtu = 256;
+ break;
+ case IB_MTU_512:
+ mtu = 512;
+ break;
+ case IB_MTU_1024:
+ mtu = 1024;
+ break;
+ case IB_MTU_2048:
+ mtu = 2048;
+ break;
+ case IB_MTU_4096:
+ mtu = 4096;
+ break;
+ default:
+ /* XXX We have already partially updated our state! */
+ goto err;
+ }
+ ipath_layer_set_mtu(dev->dd, mtu);
+
+ dev->sm_sl = pip->neighbormtu_mastersmsl & 0xF;
+
+ /* We only support VL0 */
+ if (((pip->operationalvl_pei_peo_fpi_fpo >> 4) & 0xF) > 1)
+ goto err;
+
+ if (pip->mkey_violations == 0)
+ dev->mkey_violations = 0;
+
+ /*
+ * Hardware counter can't be reset so snapshot and subtract
+ * later.
+ */
+ if (pip->pkey_violations == 0)
+ dev->n_pkey_violations =
+ ipath_layer_get_cr_errpkey(dev->dd);
+
+ if (pip->qkey_violations == 0)
+ dev->qkey_violations = 0;
+
+ if (ipath_layer_set_phyerrthreshold(
+ dev->dd,
+ (pip->localphyerrors_overrunerrors >> 4) & 0xF))
+ goto err;
+
+ if (ipath_layer_set_overrunthreshold(
+ dev->dd,
+ (pip->localphyerrors_overrunerrors & 0xF)))
+ goto err;
+
+ dev->subnet_timeout = pip->clientrereg_resv_subnetto & 0x1F;
+
+ if (pip->clientrereg_resv_subnetto & 0x80) {
+ clientrereg = 1;
+ event.event = IB_EVENT_LID_CHANGE;
+ ib_dispatch_event(&event);
+ }
+
+ /*
+ * Do the port state change now that the other link parameters
+ * have been set.
+ * Changing the port physical state only makes sense if the link
+ * is down or is being set to down.
+ */
+ state = pip->linkspeed_portstate & 0xF;
+ flags = ipath_layer_get_flags(dev->dd);
+ lstate = (pip->portphysstate_linkdown >> 4) & 0xF;
+ if (lstate && !(state == IB_PORT_DOWN || state == IB_PORT_NOP))
+ goto err;
+
+ /*
+ * Only state changes of DOWN, ARM, and ACTIVE are valid
+ * and must be in the correct state to take effect (see 7.2.6).
+ */
+ switch (state) {
+ case IB_PORT_NOP:
+ if (lstate == 0)
+ break;
+ /* FALLTHROUGH */
+ case IB_PORT_DOWN:
+ if (lstate == 0)
+ if (ipath_layer_get_linkdowndefaultstate(dev->dd))
+ lstate = IPATH_IB_LINKDOWN_SLEEP;
+ else
+ lstate = IPATH_IB_LINKDOWN;
+ else if (lstate == 1)
+ lstate = IPATH_IB_LINKDOWN_SLEEP;
+ else if (lstate == 2)
+ lstate = IPATH_IB_LINKDOWN;
+ else if (lstate == 3)
+ lstate = IPATH_IB_LINKDOWN_DISABLE;
+ else
+ goto err;
+ ipath_layer_set_linkstate(dev->dd, lstate);
+ if (flags & IPATH_LINKACTIVE) {
+ event.event = IB_EVENT_PORT_ERR;
+ ib_dispatch_event(&event);
+ }
+ break;
+ case IB_PORT_ARMED:
+ if (!(flags & (IPATH_LINKINIT | IPATH_LINKACTIVE)))
+ break;
+ ipath_layer_set_linkstate(dev->dd, IPATH_IB_LINKARM);
+ if (flags & IPATH_LINKACTIVE) {
+ event.event = IB_EVENT_PORT_ERR;
+ ib_dispatch_event(&event);
+ }
+ break;
+ case IB_PORT_ACTIVE:
+ if (!(flags & IPATH_LINKARMED))
+ break;
+ ipath_layer_set_linkstate(dev->dd, IPATH_IB_LINKACTIVE);
+ event.event = IB_EVENT_PORT_ACTIVE;
+ ib_dispatch_event(&event);
+ break;
+ default:
+ /* XXX We have already partially updated our state! */
+ goto err;
+ }
+
+ ret = recv_subn_get_portinfo(smp, ibdev, port);
+
+ if (clientrereg)
+ pip->clientrereg_resv_subnetto |= 0x80;
+
+ return ret;
+
+err:
+ smp->status |= IB_SMP_INVALID_FIELD;
+ return recv_subn_get_portinfo(smp, ibdev, port);
+}
+
+static inline int recv_subn_set_pkeytable(struct ib_smp *smp,
+ struct ib_device *ibdev)
+{
+ u32 startpx = 32 * (be32_to_cpu(smp->attr_mod) & 0xffff);
+ u16 *p = (u16 *) smp->data;
+ struct ipath_ibdev *dev = to_idev(ibdev);
+ unsigned i, n = ipath_layer_get_npkeys(dev->dd);
+
+ for (i = 0; i < n; i++)
+ p[i] = be16_to_cpu(p[i]);
+
+ if (startpx != 0 ||
+ ipath_layer_set_pkeys(dev->dd, p) != 0)
+ smp->status |= IB_SMP_INVALID_FIELD;
+
+ return recv_subn_get_pkeytable(smp, ibdev);
+}
+
+#define IB_PMA_CLASS_PORT_INFO __constant_htons(0x0001)
+#define IB_PMA_PORT_SAMPLES_CONTROL __constant_htons(0x0010)
+#define IB_PMA_PORT_SAMPLES_RESULT __constant_htons(0x0011)
+#define IB_PMA_PORT_COUNTERS __constant_htons(0x0012)
+#define IB_PMA_PORT_COUNTERS_EXT __constant_htons(0x001D)
+#define IB_PMA_PORT_SAMPLES_RESULT_EXT __constant_htons(0x001E)
+
+struct ib_perf {
+ u8 base_version;
+ u8 mgmt_class;
+ u8 class_version;
+ u8 method;
+ __be16 status;
+ __be16 unused;
+ __be64 tid;
+ __be16 attr_id;
+ __be16 resv;
+ __be32 attr_mod;
+ u8 reserved[40];
+ u8 data[192];
+} __attribute__ ((packed));
+
+struct ib_pma_classportinfo {
+ u8 base_version;
+ u8 class_version;
+ __be16 cap_mask;
+ u8 reserved[3];
+ u8 resp_time_value; /* only lower 5 bits */
+ union ib_gid redirect_gid;
+ __be32 redirect_tc_sl_fl; /* 8, 4, 20 bits respectively */
+ __be16 redirect_lid;
+ __be16 redirect_pkey;
+ __be32 redirect_qp; /* only lower 24 bits */
+ __be32 redirect_qkey;
+ union ib_gid trap_gid;
+ __be32 trap_tc_sl_fl; /* 8, 4, 20 bits respectively */
+ __be16 trap_lid;
+ __be16 trap_pkey;
+ __be32 trap_hl_qp; /* 8, 24 bits respectively */
+ __be32 trap_qkey;
+} __attribute__ ((packed));
+
+struct ib_pma_portsamplescontrol {
+ u8 opcode;
+ u8 port_select;
+ u8 tick;
+ u8 counter_width; /* only lower 3 bits */
+ __be32 counter_mask0_9; /* 2, 10 * 3, bits */
+ __be16 counter_mask10_14; /* 1, 5 * 3, bits */
+ u8 sample_mechanisms;
+ u8 sample_status; /* only lower 2 bits */
+ __be64 option_mask;
+ __be64 vendor_mask;
+ __be32 sample_start;
+ __be32 sample_interval;
+ __be16 tag;
+ __be16 counter_select[15];
+} __attribute__ ((packed));
+
+struct ib_pma_portsamplesresult {
+ __be16 tag;
+ __be16 sample_status; /* only lower 2 bits */
+ __be32 counter[15];
+} __attribute__ ((packed));
+
+struct ib_pma_portsamplesresult_ext {
+ __be16 tag;
+ __be16 sample_status; /* only lower 2 bits */
+ __be32 extended_width; /* only upper 2 bits */
+ __be64 counter[15];
+} __attribute__ ((packed));
+
+struct ib_pma_portcounters {
+ u8 reserved;
+ u8 port_select;
+ __be16 counter_select;
+ __be16 symbol_error_counter;
+ u8 link_error_recovery_counter;
+ u8 link_downed_counter;
+ __be16 port_rcv_errors;
+ __be16 port_rcv_remphys_errors;
+ __be16 port_rcv_switch_relay_errors;
+ __be16 port_xmit_discards;
+ u8 port_xmit_constraint_errors;
+ u8 port_rcv_constraint_errors;
+ u8 reserved1;
+ u8 lli_ebor_errors; /* 4, 4, bits */
+ __be16 reserved2;
+ __be16 vl15_dropped;
+ __be32 port_xmit_data;
+ __be32 port_rcv_data;
+ __be32 port_xmit_packets;
+ __be32 port_rcv_packets;
+} __attribute__ ((packed));
+
+#define IB_PMA_SEL_SYMBOL_ERROR __constant_htons(0x0001)
+#define IB_PMA_SEL_LINK_ERROR_RECOVERY __constant_htons(0x0002)
+#define IB_PMA_SEL_LINK_DOWNED __constant_htons(0x0004)
+#define IB_PMA_SEL_PORT_RCV_ERRORS __constant_htons(0x0008)
+#define IB_PMA_SEL_PORT_RCV_REMPHYS_ERRORS __constant_htons(0x0010)
+#define IB_PMA_SEL_PORT_XMIT_DISCARDS __constant_htons(0x0040)
+#define IB_PMA_SEL_PORT_XMIT_DATA __constant_htons(0x1000)
+#define IB_PMA_SEL_PORT_RCV_DATA __constant_htons(0x2000)
+#define IB_PMA_SEL_PORT_XMIT_PACKETS __constant_htons(0x4000)
+#define IB_PMA_SEL_PORT_RCV_PACKETS __constant_htons(0x8000)
+
+struct ib_pma_portcounters_ext {
+ u8 reserved;
+ u8 port_select;
+ __be16 counter_select;
+ __be32 reserved1;
+ __be64 port_xmit_data;
+ __be64 port_rcv_data;
+ __be64 port_xmit_packets;
+ __be64 port_rcv_packets;
+ __be64 port_unicast_xmit_packets;
+ __be64 port_unicast_rcv_packets;
+ __be64 port_multicast_xmit_packets;
+ __be64 port_multicast_rcv_packets;
+} __attribute__ ((packed));
+
+#define IB_PMA_SELX_PORT_XMIT_DATA __constant_htons(0x0001)
+#define IB_PMA_SELX_PORT_RCV_DATA __constant_htons(0x0002)
+#define IB_PMA_SELX_PORT_XMIT_PACKETS __constant_htons(0x0004)
+#define IB_PMA_SELX_PORT_RCV_PACKETS __constant_htons(0x0008)
+#define IB_PMA_SELX_PORT_UNI_XMIT_PACKETS __constant_htons(0x0010)
+#define IB_PMA_SELX_PORT_UNI_RCV_PACKETS __constant_htons(0x0020)
+#define IB_PMA_SELX_PORT_MULTI_XMIT_PACKETS __constant_htons(0x0040)
+#define IB_PMA_SELX_PORT_MULTI_RCV_PACKETS __constant_htons(0x0080)
+
+static int recv_pma_get_classportinfo(struct ib_perf *pmp)
+{
+ struct ib_pma_classportinfo *p =
+ (struct ib_pma_classportinfo *)pmp->data;
+
+ memset(pmp->data, 0, sizeof(pmp->data));
+
+ if (pmp->attr_mod != 0)
+ pmp->status |= IB_SMP_INVALID_FIELD;
+
+ /* Indicate AllPortSelect is valid (only one port anyway) */
+ p->cap_mask = cpu_to_be16(1 << 8);
+ p->base_version = 1;
+ p->class_version = 1;
+ /*
+ * Expected response time is 4.096 usec. * 2^18 == 1.073741824
+ * sec.
+ */
+ p->resp_time_value = 18;
+
+ return reply((struct ib_smp *) pmp);
+}
+
+/*
+ * The PortSamplesControl.CounterMasks field is an array of 3 bit fields
+ * which specify the N'th counter's capabilities. See ch. 16.1.3.2.
+ * We support 5 counters which only count the mandatory quantities.
+ */
+#define COUNTER_MASK(q, n) (q << ((9 - n) * 3))
+#define COUNTER_MASK0_9 \
+ __constant_cpu_to_be32(COUNTER_MASK(1, 0) | \
+ COUNTER_MASK(1, 1) | \
+ COUNTER_MASK(1, 2) | \
+ COUNTER_MASK(1, 3) | \
+ COUNTER_MASK(1, 4))
+
+static int recv_pma_get_portsamplescontrol(struct ib_perf *pmp,
+ struct ib_device *ibdev, u8 port)
+{
+ struct ib_pma_portsamplescontrol *p =
+ (struct ib_pma_portsamplescontrol *)pmp->data;
+ struct ipath_ibdev *dev = to_idev(ibdev);
+ unsigned long flags;
+ u8 port_select = p->port_select;
+
+ memset(pmp->data, 0, sizeof(pmp->data));
+
+ p->port_select = port_select;
+ if (pmp->attr_mod != 0 ||
+ (port_select != port && port_select != 0xFF))
+ pmp->status |= IB_SMP_INVALID_FIELD;
+ /*
+ * Ticks are 10x the link transfer period which for 2.5Gbs is 4
+ * nsec. 0 == 4 nsec., 1 == 8 nsec., ..., 255 == 1020 nsec. Sample
+ * intervals are counted in ticks. Since we use Linux timers, that
+ * count in jiffies, we can't sample for less than 1000 ticks if HZ
+ * == 1000 (4000 ticks if HZ is 250).
+ */
+ /* XXX This is WRONG. */
+ p->tick = 250; /* 1 usec. */
+ p->counter_width = 4; /* 32 bit counters */
+ p->counter_mask0_9 = COUNTER_MASK0_9;
+ spin_lock_irqsave(&dev->pending_lock, flags);
+ p->sample_status = dev->pma_sample_status;
+ p->sample_start = cpu_to_be32(dev->pma_sample_start);
+ p->sample_interval = cpu_to_be32(dev->pma_sample_interval);
+ p->tag = cpu_to_be16(dev->pma_tag);
+ p->counter_select[0] = dev->pma_counter_select[0];
+ p->counter_select[1] = dev->pma_counter_select[1];
+ p->counter_select[2] = dev->pma_counter_select[2];
+ p->counter_select[3] = dev->pma_counter_select[3];
+ p->counter_select[4] = dev->pma_counter_select[4];
+ spin_unlock_irqrestore(&dev->pending_lock, flags);
+
+ return reply((struct ib_smp *) pmp);
+}
+
+static int recv_pma_set_portsamplescontrol(struct ib_perf *pmp,
+ struct ib_device *ibdev, u8 port)
+{
+ struct ib_pma_portsamplescontrol *p =
+ (struct ib_pma_portsamplescontrol *)pmp->data;
+ struct ipath_ibdev *dev = to_idev(ibdev);
+ unsigned long flags;
+ u32 start;
+
+ if (pmp->attr_mod != 0 ||
+ (p->port_select != port && p->port_select != 0xFF)) {
+ pmp->status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_smp *) pmp);
+ }
+
+ start = be32_to_cpu(p->sample_start);
+ if (start != 0) {
+ spin_lock_irqsave(&dev->pending_lock, flags);
+ if (dev->pma_sample_status == IB_PMA_SAMPLE_STATUS_DONE) {
+ dev->pma_sample_status = IB_PMA_SAMPLE_STATUS_STARTED;
+ dev->pma_sample_start = start;
+ dev->pma_sample_interval =
+ be32_to_cpu(p->sample_interval);
+ dev->pma_tag = be16_to_cpu(p->tag);
+ if (p->counter_select[0])
+ dev->pma_counter_select[0] =
+ p->counter_select[0];
+ if (p->counter_select[1])
+ dev->pma_counter_select[1] =
+ p->counter_select[1];
+ if (p->counter_select[2])
+ dev->pma_counter_select[2] =
+ p->counter_select[2];
+ if (p->counter_select[3])
+ dev->pma_counter_select[3] =
+ p->counter_select[3];
+ if (p->counter_select[4])
+ dev->pma_counter_select[4] =
+ p->counter_select[4];
+ }
+ spin_unlock_irqrestore(&dev->pending_lock, flags);
+ }
+ return recv_pma_get_portsamplescontrol(pmp, ibdev, port);
+}
+
+static u64 get_counter(struct ipath_ibdev *dev, __be16 sel)
+{
+ switch (sel) {
+ case IB_PMA_PORT_XMIT_DATA:
+ return dev->ipath_sword;
+ case IB_PMA_PORT_RCV_DATA:
+ return dev->ipath_rword;
+ case IB_PMA_PORT_XMIT_PKTS:
+ return dev->ipath_spkts;
+ case IB_PMA_PORT_RCV_PKTS:
+ return dev->ipath_rpkts;
+ case IB_PMA_PORT_XMIT_WAIT:
+ return dev->ipath_xmit_wait;
+ default:
+ return 0;
+ }
+}
+
+static int recv_pma_get_portsamplesresult(struct ib_perf *pmp,
+ struct ib_device *ibdev)
+{
+ struct ib_pma_portsamplesresult *p =
+ (struct ib_pma_portsamplesresult *)pmp->data;
+ struct ipath_ibdev *dev = to_idev(ibdev);
+ int i;
+
+ memset(pmp->data, 0, sizeof(pmp->data));
+ p->tag = cpu_to_be16(dev->pma_tag);
+ p->sample_status = cpu_to_be16(dev->pma_sample_status);
+ for (i = 0; i < ARRAY_SIZE(dev->pma_counter_select); i++)
+ p->counter[i] = cpu_to_be32(
+ get_counter(dev, dev->pma_counter_select[i]));
+
+ return reply((struct ib_smp *) pmp);
+}
+
+static int recv_pma_get_portsamplesresult_ext(struct ib_perf *pmp,
+ struct ib_device *ibdev)
+{
+ struct ib_pma_portsamplesresult_ext *p =
+ (struct ib_pma_portsamplesresult_ext *)pmp->data;
+ struct ipath_ibdev *dev = to_idev(ibdev);
+ int i;
+
+ memset(pmp->data, 0, sizeof(pmp->data));
+ p->tag = cpu_to_be16(dev->pma_tag);
+ p->sample_status = cpu_to_be16(dev->pma_sample_status);
+ /* 64 bits */
+ p->extended_width = __constant_cpu_to_be32(0x80000000);
+ for (i = 0; i < ARRAY_SIZE(dev->pma_counter_select); i++)
+ p->counter[i] = cpu_to_be64(
+ get_counter(dev, dev->pma_counter_select[i]));
+
+ return reply((struct ib_smp *) pmp);
+}
+
+static int recv_pma_get_portcounters(struct ib_perf *pmp,
+ struct ib_device *ibdev, u8 port)
+{
+ struct ib_pma_portcounters *p = (struct ib_pma_portcounters *)
+ pmp->data;
+ struct ipath_ibdev *dev = to_idev(ibdev);
+ struct ipath_layer_counters cntrs;
+ u8 port_select = p->port_select;
+
+ ipath_layer_get_counters(dev->dd, &cntrs);
+
+ /* Adjust counters for any resets done. */
+ cntrs.symbol_error_counter -= dev->n_symbol_error_counter;
+ cntrs.link_error_recovery_counter -=
+ dev->n_link_error_recovery_counter;
+ cntrs.link_downed_counter -= dev->n_link_downed_counter;
+ cntrs.port_rcv_errors += dev->rcv_errors;
+ cntrs.port_rcv_errors -= dev->n_port_rcv_errors;
+ cntrs.port_rcv_remphys_errors -= dev->n_port_rcv_remphys_errors;
+ cntrs.port_xmit_discards -= dev->n_port_xmit_discards;
+ cntrs.port_xmit_data -= dev->n_port_xmit_data;
+ cntrs.port_rcv_data -= dev->n_port_rcv_data;
+ cntrs.port_xmit_packets -= dev->n_port_xmit_packets;
+ cntrs.port_rcv_packets -= dev->n_port_rcv_packets;
+
+ memset(pmp->data, 0, sizeof(pmp->data));
+
+ p->port_select = port_select;
+ if (pmp->attr_mod != 0 ||
+ (port_select != port && port_select != 0xFF))
+ pmp->status |= IB_SMP_INVALID_FIELD;
+
+ if (cntrs.symbol_error_counter > 0xFFFFUL)
+ p->symbol_error_counter = 0xFFFF;
+ else
+ p->symbol_error_counter =
+ cpu_to_be16((u16)cntrs.symbol_error_counter);
+ if (cntrs.link_error_recovery_counter > 0xFFUL)
+ p->link_error_recovery_counter = 0xFF;
+ else
+ p->link_error_recovery_counter =
+ (u8)cntrs.link_error_recovery_counter;
+ if (cntrs.link_downed_counter > 0xFFUL)
+ p->link_downed_counter = 0xFF;
+ else
+ p->link_downed_counter = (u8)cntrs.link_downed_counter;
+ if (cntrs.port_rcv_errors > 0xFFFFUL)
+ p->port_rcv_errors = 0xFFFF;
+ else
+ p->port_rcv_errors =
+ cpu_to_be16((u16) cntrs.port_rcv_errors);
+ if (cntrs.port_rcv_remphys_errors > 0xFFFFUL)
+ p->port_rcv_remphys_errors = 0xFFFF;
+ else
+ p->port_rcv_remphys_errors =
+ cpu_to_be16((u16)cntrs.port_rcv_remphys_errors);
+ if (cntrs.port_xmit_discards > 0xFFFFUL)
+ p->port_xmit_discards = 0xFFFF;
+ else
+ p->port_xmit_discards =
+ cpu_to_be16((u16)cntrs.port_xmit_discards);
+ if (cntrs.port_xmit_data > 0xFFFFFFFFUL)
+ p->port_xmit_data = 0xFFFFFFFF;
+ else
+ p->port_xmit_data = cpu_to_be32((u32)cntrs.port_xmit_data);
+ if (cntrs.port_rcv_data > 0xFFFFFFFFUL)
+ p->port_rcv_data = 0xFFFFFFFF;
+ else
+ p->port_rcv_data = cpu_to_be32((u32)cntrs.port_rcv_data);
+ if (cntrs.port_xmit_packets > 0xFFFFFFFFUL)
+ p->port_xmit_packets = 0xFFFFFFFF;
+ else
+ p->port_xmit_packets =
+ cpu_to_be32((u32)cntrs.port_xmit_packets);
+ if (cntrs.port_rcv_packets > 0xFFFFFFFFUL)
+ p->port_rcv_packets = 0xFFFFFFFF;
+ else
+ p->port_rcv_packets =
+ cpu_to_be32((u32) cntrs.port_rcv_packets);
+
+ return reply((struct ib_smp *) pmp);
+}
+
+static int recv_pma_get_portcounters_ext(struct ib_perf *pmp,
+ struct ib_device *ibdev, u8 port)
+{
+ struct ib_pma_portcounters_ext *p =
+ (struct ib_pma_portcounters_ext *)pmp->data;
+ struct ipath_ibdev *dev = to_idev(ibdev);
+ u64 swords, rwords, spkts, rpkts, xwait;
+ u8 port_select = p->port_select;
+
+ ipath_layer_snapshot_counters(dev->dd, &swords, &rwords, &spkts,
+ &rpkts, &xwait);
+
+ /* Adjust counters for any resets done. */
+ swords -= dev->n_port_xmit_data;
+ rwords -= dev->n_port_rcv_data;
+ spkts -= dev->n_port_xmit_packets;
+ rpkts -= dev->n_port_rcv_packets;
+
+ memset(pmp->data, 0, sizeof(pmp->data));
+
+ p->port_select = port_select;
+ if (pmp->attr_mod != 0 ||
+ (port_select != port && port_select != 0xFF))
+ pmp->status |= IB_SMP_INVALID_FIELD;
+
+ p->port_xmit_data = cpu_to_be64(swords);
+ p->port_rcv_data = cpu_to_be64(rwords);
+ p->port_xmit_packets = cpu_to_be64(spkts);
+ p->port_rcv_packets = cpu_to_be64(rpkts);
+ p->port_unicast_xmit_packets = cpu_to_be64(dev->n_unicast_xmit);
+ p->port_unicast_rcv_packets = cpu_to_be64(dev->n_unicast_rcv);
+ p->port_multicast_xmit_packets = cpu_to_be64(dev->n_multicast_xmit);
+ p->port_multicast_rcv_packets = cpu_to_be64(dev->n_multicast_rcv);
+
+ return reply((struct ib_smp *) pmp);
+}
+
+static int recv_pma_set_portcounters(struct ib_perf *pmp,
+ struct ib_device *ibdev, u8 port)
+{
+ struct ib_pma_portcounters *p = (struct ib_pma_portcounters *)
+ pmp->data;
+ struct ipath_ibdev *dev = to_idev(ibdev);
+ struct ipath_layer_counters cntrs;
+
+ /*
+ * Since the HW doesn't support clearing counters, we save the
+ * current count and subtract it from future responses.
+ */
+ ipath_layer_get_counters(dev->dd, &cntrs);
+
+ if (p->counter_select & IB_PMA_SEL_SYMBOL_ERROR)
+ dev->n_symbol_error_counter = cntrs.symbol_error_counter;
+
+ if (p->counter_select & IB_PMA_SEL_LINK_ERROR_RECOVERY)
+ dev->n_link_error_recovery_counter =
+ cntrs.link_error_recovery_counter;
+
+ if (p->counter_select & IB_PMA_SEL_LINK_DOWNED)
+ dev->n_link_downed_counter = cntrs.link_downed_counter;
+
+ if (p->counter_select & IB_PMA_SEL_PORT_RCV_ERRORS)
+ dev->n_port_rcv_errors =
+ cntrs.port_rcv_errors + dev->rcv_errors;
+
+ if (p->counter_select & IB_PMA_SEL_PORT_RCV_REMPHYS_ERRORS)
+ dev->n_port_rcv_remphys_errors =
+ cntrs.port_rcv_remphys_errors;
+
+ if (p->counter_select & IB_PMA_SEL_PORT_XMIT_DISCARDS)
+ dev->n_port_xmit_discards = cntrs.port_xmit_discards;
+
+ if (p->counter_select & IB_PMA_SEL_PORT_XMIT_DATA)
+ dev->n_port_xmit_data = cntrs.port_xmit_data;
+
+ if (p->counter_select & IB_PMA_SEL_PORT_RCV_DATA)
+ dev->n_port_rcv_data = cntrs.port_rcv_data;
+
+ if (p->counter_select & IB_PMA_SEL_PORT_XMIT_PACKETS)
+ dev->n_port_xmit_packets = cntrs.port_xmit_packets;
+
+ if (p->counter_select & IB_PMA_SEL_PORT_RCV_PACKETS)
+ dev->n_port_rcv_packets = cntrs.port_rcv_packets;
+
+ return recv_pma_get_portcounters(pmp, ibdev, port);
+}
+
+static int recv_pma_set_portcounters_ext(struct ib_perf *pmp,
+ struct ib_device *ibdev, u8 port)
+{
+ struct ib_pma_portcounters *p = (struct ib_pma_portcounters *)
+ pmp->data;
+ struct ipath_ibdev *dev = to_idev(ibdev);
+ u64 swords, rwords, spkts, rpkts, xwait;
+
+ ipath_layer_snapshot_counters(dev->dd, &swords, &rwords, &spkts,
+ &rpkts, &xwait);
+
+ if (p->counter_select & IB_PMA_SELX_PORT_XMIT_DATA)
+ dev->n_port_xmit_data = swords;
+
+ if (p->counter_select & IB_PMA_SELX_PORT_RCV_DATA)
+ dev->n_port_rcv_data = rwords;
+
+ if (p->counter_select & IB_PMA_SELX_PORT_XMIT_PACKETS)
+ dev->n_port_xmit_packets = spkts;
+
+ if (p->counter_select & IB_PMA_SELX_PORT_RCV_PACKETS)
+ dev->n_port_rcv_packets = rpkts;
+
+ if (p->counter_select & IB_PMA_SELX_PORT_UNI_XMIT_PACKETS)
+ dev->n_unicast_xmit = 0;
+
+ if (p->counter_select & IB_PMA_SELX_PORT_UNI_RCV_PACKETS)
+ dev->n_unicast_rcv = 0;
+
+ if (p->counter_select & IB_PMA_SELX_PORT_MULTI_XMIT_PACKETS)
+ dev->n_multicast_xmit = 0;
+
+ if (p->counter_select & IB_PMA_SELX_PORT_MULTI_RCV_PACKETS)
+ dev->n_multicast_rcv = 0;
+
+ return recv_pma_get_portcounters_ext(pmp, ibdev, port);
+}
+
+static inline int process_subn(struct ib_device *ibdev, int mad_flags,
+ u8 port_num, struct ib_mad *in_mad,
+ struct ib_mad *out_mad)
+{
+ struct ib_smp *smp = (struct ib_smp *)out_mad;
+ struct ipath_ibdev *dev = to_idev(ibdev);
+
+ *out_mad = *in_mad;
+ if (smp->class_version != 1) {
+ smp->status |= IB_SMP_UNSUP_VERSION;
+ return reply(smp);
+ }
+
+ /* Is the mkey in the process of expiring? */
+ if (dev->mkey_lease_timeout && jiffies >= dev->mkey_lease_timeout) {
+ /* Clear timeout and mkey protection field. */
+ dev->mkey_lease_timeout = 0;
+ dev->mkeyprot_resv_lmc &= 0x3F;
+ }
+
+ /*
+ * M_Key checking depends on
+ * Portinfo:M_Key_protect_bits
+ */
+ if ((mad_flags & IB_MAD_IGNORE_MKEY) == 0 && dev->mkey != 0 &&
+ dev->mkey != smp->mkey &&
+ (smp->method == IB_MGMT_METHOD_SET ||
+ (smp->method == IB_MGMT_METHOD_GET &&
+ (dev->mkeyprot_resv_lmc >> 7) != 0))) {
+ if (dev->mkey_violations != 0xFFFF)
+ ++dev->mkey_violations;
+ if (dev->mkey_lease_timeout || dev->mkey_lease_period == 0)
+ return IB_MAD_RESULT_SUCCESS |
+ IB_MAD_RESULT_CONSUMED;
+ dev->mkey_lease_timeout = jiffies +
+ dev->mkey_lease_period * HZ;
+ /* Future: Generate a trap notice. */
+ return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
+ } else if (dev->mkey_lease_timeout)
+ dev->mkey_lease_timeout = 0;
+
+ switch (smp->method) {
+ case IB_MGMT_METHOD_GET:
+ switch (smp->attr_id) {
+ case IB_SMP_ATTR_NODE_DESC:
+ return recv_subn_get_nodedescription(smp, ibdev);
+
+ case IB_SMP_ATTR_NODE_INFO:
+ return recv_subn_get_nodeinfo(smp, ibdev, port_num);
+
+ case IB_SMP_ATTR_GUID_INFO:
+ return recv_subn_get_guidinfo(smp, ibdev);
+
+ case IB_SMP_ATTR_PORT_INFO:
+ return recv_subn_get_portinfo(smp, ibdev, port_num);
+
+ case IB_SMP_ATTR_PKEY_TABLE:
+ return recv_subn_get_pkeytable(smp, ibdev);
+
+ case IB_SMP_ATTR_SM_INFO:
+ if (dev->port_cap_flags & IB_PORT_SM_DISABLED)
+ return IB_MAD_RESULT_SUCCESS |
+ IB_MAD_RESULT_CONSUMED;
+ if (dev->port_cap_flags & IB_PORT_SM)
+ return IB_MAD_RESULT_SUCCESS;
+ /* FALLTHROUGH */
+ default:
+ smp->status |= IB_SMP_UNSUP_METH_ATTR;
+ return reply(smp);
+ }
+
+ case IB_MGMT_METHOD_SET:
+ switch (smp->attr_id) {
+ case IB_SMP_ATTR_GUID_INFO:
+ return recv_subn_set_guidinfo(smp, ibdev);
+
+ case IB_SMP_ATTR_PORT_INFO:
+ return recv_subn_set_portinfo(smp, ibdev, port_num);
+
+ case IB_SMP_ATTR_PKEY_TABLE:
+ return recv_subn_set_pkeytable(smp, ibdev);
+
+ case IB_SMP_ATTR_SM_INFO:
+ if (dev->port_cap_flags & IB_PORT_SM_DISABLED)
+ return IB_MAD_RESULT_SUCCESS |
+ IB_MAD_RESULT_CONSUMED;
+ if (dev->port_cap_flags & IB_PORT_SM)
+ return IB_MAD_RESULT_SUCCESS;
+ /* FALLTHROUGH */
+ default:
+ smp->status |= IB_SMP_UNSUP_METH_ATTR;
+ return reply(smp);
+ }
+
+ case IB_MGMT_METHOD_GET_RESP:
+ /*
+ * The ib_mad module will call us to process responses
+ * before checking for other consumers.
+ * Just tell the caller to process it normally.
+ */
+ return IB_MAD_RESULT_FAILURE;
+
+ default:
+ smp->status |= IB_SMP_UNSUP_METHOD;
+ return reply(smp);
+ }
+}
+
+static inline int process_perf(struct ib_device *ibdev, u8 port_num,
+ struct ib_mad *in_mad,
+ struct ib_mad *out_mad)
+{
+ struct ib_perf *pmp = (struct ib_perf *)out_mad;
+
+ *out_mad = *in_mad;
+ if (pmp->class_version != 1) {
+ pmp->status |= IB_SMP_UNSUP_VERSION;
+ return reply((struct ib_smp *) pmp);
+ }
+
+ switch (pmp->method) {
+ case IB_MGMT_METHOD_GET:
+ switch (pmp->attr_id) {
+ case IB_PMA_CLASS_PORT_INFO:
+ return recv_pma_get_classportinfo(pmp);
+
+ case IB_PMA_PORT_SAMPLES_CONTROL:
+ return recv_pma_get_portsamplescontrol(pmp, ibdev,
+ port_num);
+
+ case IB_PMA_PORT_SAMPLES_RESULT:
+ return recv_pma_get_portsamplesresult(pmp, ibdev);
+
+ case IB_PMA_PORT_SAMPLES_RESULT_EXT:
+ return recv_pma_get_portsamplesresult_ext(pmp,
+ ibdev);
+
+ case IB_PMA_PORT_COUNTERS:
+ return recv_pma_get_portcounters(pmp, ibdev,
+ port_num);
+
+ case IB_PMA_PORT_COUNTERS_EXT:
+ return recv_pma_get_portcounters_ext(pmp, ibdev,
+ port_num);
+
+ default:
+ pmp->status |= IB_SMP_UNSUP_METH_ATTR;
+ return reply((struct ib_smp *) pmp);
+ }
+
+ case IB_MGMT_METHOD_SET:
+ switch (pmp->attr_id) {
+ case IB_PMA_PORT_SAMPLES_CONTROL:
+ return recv_pma_set_portsamplescontrol(pmp, ibdev,
+ port_num);
+
+ case IB_PMA_PORT_COUNTERS:
+ return recv_pma_set_portcounters(pmp, ibdev,
+ port_num);
+
+ case IB_PMA_PORT_COUNTERS_EXT:
+ return recv_pma_set_portcounters_ext(pmp, ibdev,
+ port_num);
+
+ default:
+ pmp->status |= IB_SMP_UNSUP_METH_ATTR;
+ return reply((struct ib_smp *) pmp);
+ }
+
+ case IB_MGMT_METHOD_GET_RESP:
+ /*
+ * The ib_mad module will call us to process responses
+ * before checking for other consumers.
+ * Just tell the caller to process it normally.
+ */
+ return IB_MAD_RESULT_FAILURE;
+
+ default:
+ pmp->status |= IB_SMP_UNSUP_METHOD;
+ return reply((struct ib_smp *) pmp);
+ }
+}
+
+/**
+ * ipath_process_mad - process an incoming MAD packet
+ * @ibdev: the infiniband device this packet came in on
+ * @mad_flags: MAD flags
+ * @port_num: the port number this packet came in on
+ * @in_wc: the work completion entry for this packet
+ * @in_grh: the global route header for this packet
+ * @in_mad: the incoming MAD
+ * @out_mad: any outgoing MAD reply
+ *
+ * Returns IB_MAD_RESULT_SUCCESS if this is a MAD that we are not
+ * interested in processing.
+ *
+ * Note that the verbs framework has already done the MAD sanity checks,
+ * and hop count/pointer updating for IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
+ * MADs.
+ *
+ * This is called by the ib_mad module.
+ */
+int ipath_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
+ struct ib_wc *in_wc, struct ib_grh *in_grh,
+ struct ib_mad *in_mad, struct ib_mad *out_mad)
+{
+ struct ipath_ibdev *dev = to_idev(ibdev);
+
+ /*
+ * Snapshot current HW counters to "clear" them.
+ * This should be done when the driver is loaded except that for
+ * some reason we get a zillion errors when brining up the link.
+ */
+ if (dev->rcv_errors == 0) {
+ struct ipath_layer_counters cntrs;
+
+ ipath_layer_get_counters(to_idev(ibdev)->dd, &cntrs);
+ dev->rcv_errors++;
+ dev->n_symbol_error_counter = cntrs.symbol_error_counter;
+ dev->n_link_error_recovery_counter =
+ cntrs.link_error_recovery_counter;
+ dev->n_link_downed_counter = cntrs.link_downed_counter;
+ dev->n_port_rcv_errors = cntrs.port_rcv_errors + 1;
+ dev->n_port_rcv_remphys_errors = cntrs.port_rcv_remphys_errors;
+ dev->n_port_xmit_discards = cntrs.port_xmit_discards;
+ dev->n_port_xmit_data = cntrs.port_xmit_data;
+ dev->n_port_rcv_data = cntrs.port_rcv_data;
+ dev->n_port_xmit_packets = cntrs.port_xmit_packets;
+ dev->n_port_rcv_packets = cntrs.port_rcv_packets;
+ }
+ switch (in_mad->mad_hdr.mgmt_class) {
+ case IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE:
+ case IB_MGMT_CLASS_SUBN_LID_ROUTED:
+ return process_subn(ibdev, mad_flags, port_num,
+ in_mad, out_mad);
+
+ case IB_MGMT_CLASS_PERF_MGMT:
+ return process_perf(ibdev, port_num, in_mad, out_mad);
+
+ default:
+ return IB_MAD_RESULT_SUCCESS;
+ }
+}
diff -r 44cd07539d66 -r f57c24166c57 drivers/infiniband/hw/ipath/ipath_qp.c
--- /dev/null Thu Jan 1 00:00:00 1970 +0000
+++ b/drivers/infiniband/hw/ipath/ipath_qp.c Thu Mar 9 16:16:51 2006 -0800
@@ -0,0 +1,876 @@
+/*
+ * Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/err.h>
+#include <linux/vmalloc.h>
+
+#include "ipath_verbs.h"
+#include "ips_common.h"
+
+#define BITS_PER_PAGE (PAGE_SIZE*BITS_PER_BYTE)
+#define BITS_PER_PAGE_MASK (BITS_PER_PAGE-1)
+#define mk_qpn(qpt, map, off) (((map) - (qpt)->map) * BITS_PER_PAGE + \
+ (off))
+#define find_next_offset(map, off) find_next_zero_bit((map)->page, \
+ BITS_PER_PAGE, off)
+
+#define TRANS_INVALID 0
+#define TRANS_ANY2RST 1
+#define TRANS_RST2INIT 2
+#define TRANS_INIT2INIT 3
+#define TRANS_INIT2RTR 4
+#define TRANS_RTR2RTS 5
+#define TRANS_RTS2RTS 6
+#define TRANS_SQERR2RTS 7
+#define TRANS_ANY2ERR 8
+#define TRANS_RTS2SQD 9 /* XXX Wait for expected ACKs & signal event */
+#define TRANS_SQD2SQD 10 /* error if not drained & parameter change */
+#define TRANS_SQD2RTS 11 /* error if not drained */
+
+/*
+ * Convert the AETH credit code into the number of credits.
+ */
+static u32 credit_table[31] = {
+ 0, /* 0 */
+ 1, /* 1 */
+ 2, /* 2 */
+ 3, /* 3 */
+ 4, /* 4 */
+ 6, /* 5 */
+ 8, /* 6 */
+ 12, /* 7 */
+ 16, /* 8 */
+ 24, /* 9 */
+ 32, /* A */
+ 48, /* B */
+ 64, /* C */
+ 96, /* D */
+ 128, /* E */
+ 192, /* F */
+ 256, /* 10 */
+ 384, /* 11 */
+ 512, /* 12 */
+ 768, /* 13 */
+ 1024, /* 14 */
+ 1536, /* 15 */
+ 2048, /* 16 */
+ 3072, /* 17 */
+ 4096, /* 18 */
+ 6144, /* 19 */
+ 8192, /* 1A */
+ 12288, /* 1B */
+ 16384, /* 1C */
+ 24576, /* 1D */
+ 32768 /* 1E */
+};
+
+static inline u32 alloc_qpn(struct ipath_qp_table *qpt)
+{
+ u32 i, offset, max_scan, qpn;
+ struct qpn_map *map;
+
+ qpn = qpt->last + 1;
+ if (qpn >= QPN_MAX)
+ qpn = 2;
+ offset = qpn & BITS_PER_PAGE_MASK;
+ map = &qpt->map[qpn / BITS_PER_PAGE];
+ max_scan = qpt->nmaps - !offset;
+ for (i = 0;;) {
+ if (unlikely(!map->page)) {
+ unsigned long page = get_zeroed_page(GFP_KERNEL);
+ unsigned long flags;
+
+ /*
+ * Free the page if someone raced with us
+ * installing it:
+ */
+ spin_lock_irqsave(&qpt->lock, flags);
+ if (map->page)
+ free_page(page);
+ else
+ map->page = (void *)page;
+ spin_unlock_irqrestore(&qpt->lock, flags);
+ if (unlikely(!map->page))
+ break;
+ }
+ if (likely(atomic_read(&map->n_free))) {
+ do {
+ if (!test_and_set_bit(offset, map->page)) {
+ atomic_dec(&map->n_free);
+ qpt->last = qpn;
+ return qpn;
+ }
+ offset = find_next_offset(map, offset);
+ qpn = mk_qpn(qpt, map, offset);
+ /*
+ * This test differs from alloc_pidmap().
+ * If find_next_offset() does find a zero
+ * bit, we don't need to check for QPN
+ * wrapping around past our starting QPN.
+ * We just need to be sure we don't loop
+ * forever.
+ */
+ } while (offset < BITS_PER_PAGE && qpn < QPN_MAX);
+ }
+ /*
+ * In order to keep the number of pages allocated to a
+ * minimum, we scan the all existing pages before increasing
+ * the size of the bitmap table.
+ */
+ if (++i > max_scan) {
+ if (qpt->nmaps == QPNMAP_ENTRIES)
+ break;
+ map = &qpt->map[qpt->nmaps++];
+ offset = 0;
+ } else if (map < &qpt->map[qpt->nmaps]) {
+ ++map;
+ offset = 0;
+ } else {
+ map = &qpt->map[0];
+ offset = 2;
+ }
+ qpn = mk_qpn(qpt, map, offset);
+ }
+ return 0;
+}
+
+static inline void free_qpn(struct ipath_qp_table *qpt, u32 qpn)
+{
+ struct qpn_map *map;
+
+ map = qpt->map + qpn / BITS_PER_PAGE;
+ if (map->page)
+ clear_bit(qpn & BITS_PER_PAGE_MASK, map->page);
+ atomic_inc(&map->n_free);
+}
+
+/**
+ * ipath_alloc_qpn - allocate a QP number
+ * @qpt: the QP table
+ * @qp: the QP
+ * @type: the QP type (IB_QPT_SMI and IB_QPT_GSI are special)
+ *
+ * Allocate the next available QPN and put the QP into the hash table.
+ * The hash table holds a reference to the QP.
+ */
+int ipath_alloc_qpn(struct ipath_qp_table *qpt, struct ipath_qp *qp,
+ enum ib_qp_type type)
+{
+ unsigned long flags;
+ u32 qpn;
+
+ if (type == IB_QPT_SMI)
+ qpn = 0;
+ else if (type == IB_QPT_GSI)
+ qpn = 1;
+ else {
+ /* Allocate the next available QPN */
+ qpn = alloc_qpn(qpt);
+ if (qpn == 0)
+ return -ENOMEM;
+ }
+ qp->ibqp.qp_num = qpn;
+
+ /* Add the QP to the hash table. */
+ spin_lock_irqsave(&qpt->lock, flags);
+
+ qpn %= qpt->max;
+ qp->next = qpt->table[qpn];
+ qpt->table[qpn] = qp;
+ atomic_inc(&qp->refcount);
+
+ spin_unlock_irqrestore(&qpt->lock, flags);
+ return 0;
+}
+
+/**
+ * ipath_free_qp - remove a QP from the QP table
+ * @qpt: the QP table
+ * @qp: the QP to remove
+ *
+ * Remove the QP from the table so it can't be found asynchronously by
+ * the receive interrupt routine.
+ */
+void ipath_free_qp(struct ipath_qp_table *qpt, struct ipath_qp *qp)
+{
+ struct ipath_qp *q, **qpp;
+ unsigned long flags;
+ int fnd = 0;
+
+ spin_lock_irqsave(&qpt->lock, flags);
+
+ /* Remove QP from the hash table. */
+ qpp = &qpt->table[qp->ibqp.qp_num % qpt->max];
+ for (; (q = *qpp) != NULL; qpp = &q->next) {
+ if (q == qp) {
+ *qpp = qp->next;
+ qp->next = NULL;
+ atomic_dec(&qp->refcount);
+ fnd = 1;
+ break;
+ }
+ }
+
+ spin_unlock_irqrestore(&qpt->lock, flags);
+
+ if (!fnd)
+ return;
+
+ /* If QPN is not reserved, mark QPN free in the bitmap. */
+ if (qp->ibqp.qp_num > 1)
+ free_qpn(qpt, qp->ibqp.qp_num);
+
+ wait_event(qp->wait, !atomic_read(&qp->refcount));
+}
+
+/**
+ * ipath_free_all_qps - remove all QPs from the table
+ * @qpt: the QP table to empty
+ */
+void ipath_free_all_qps(struct ipath_qp_table *qpt)
+{
+ unsigned long flags;
+ struct ipath_qp *qp, *nqp;
+ u32 n;
+
+ for (n = 0; n < qpt->max; n++) {
+ spin_lock_irqsave(&qpt->lock, flags);
+ qp = qpt->table[n];
+ qpt->table[n] = NULL;
+ spin_unlock_irqrestore(&qpt->lock, flags);
+
+ while (qp) {
+ nqp = qp->next;
+ if (qp->ibqp.qp_num > 1)
+ free_qpn(qpt, qp->ibqp.qp_num);
+ if (!atomic_dec_and_test(&qp->refcount) ||
+ !ipath_destroy_qp(&qp->ibqp))
+ _VERBS_INFO("QP memory leak!\n");
+ qp = nqp;
+ }
+ }
+
+ for (n = 0; n < ARRAY_SIZE(qpt->map); n++) {
+ if (qpt->map[n].page)
+ free_page((unsigned long)qpt->map[n].page);
+ }
+}
+
+/**
+ * ipath_lookup_qpn - return the QP with the given QPN
+ * @qpt: the QP table
+ * @qpn: the QP number to look up
+ *
+ * The caller is responsible for decrementing the QP reference count
+ * when done.
+ */
+struct ipath_qp *ipath_lookup_qpn(struct ipath_qp_table *qpt, u32 qpn)
+{
+ unsigned long flags;
+ struct ipath_qp *qp;
+
+ spin_lock_irqsave(&qpt->lock, flags);
+
+ for (qp = qpt->table[qpn % qpt->max]; qp; qp = qp->next) {
+ if (qp->ibqp.qp_num == qpn) {
+ atomic_inc(&qp->refcount);
+ break;
+ }
+ }
+
+ spin_unlock_irqrestore(&qpt->lock, flags);
+ return qp;
+}
+
+/**
+ * ipath_reset_qp - initialize the QP state to the reset state
+ * @qp: the QP to reset
+ */
+static void ipath_reset_qp(struct ipath_qp *qp)
+{
+ qp->remote_qpn = 0;
+ qp->qkey = 0;
+ qp->qp_access_flags = 0;
+ qp->s_hdrwords = 0;
+ qp->s_psn = 0;
+ qp->r_psn = 0;
+ atomic_set(&qp->msn, 0);
+ if (qp->ibqp.qp_type == IB_QPT_RC) {
+ qp->s_state = IB_OPCODE_RC_SEND_LAST;
+ qp->r_state = IB_OPCODE_RC_SEND_LAST;
+ } else {
+ qp->s_state = IB_OPCODE_UC_SEND_LAST;
+ qp->r_state = IB_OPCODE_UC_SEND_LAST;
+ }
+ qp->s_ack_state = IB_OPCODE_RC_ACKNOWLEDGE;
+ qp->s_nak_state = 0;
+ qp->s_rnr_timeout = 0;
+ qp->s_head = 0;
+ qp->s_tail = 0;
+ qp->s_cur = 0;
+ qp->s_last = 0;
+ qp->s_ssn = 1;
+ qp->s_lsn = 0;
+ qp->r_rq.head = 0;
+ qp->r_rq.tail = 0;
+ qp->r_reuse_sge = 0;
+}
+
+/**
+ * ipath_modify_qp - modify the attributes of a queue pair
+ * @ibqp: the queue pair who's attributes we're modifying
+ * @attr: the new attributes
+ * @attr_mask: the mask of attributes to modify
+ *
+ * Returns 0 on success, otherwise returns an errno.
+ */
+int ipath_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
+ int attr_mask)
+{
+ struct ipath_qp *qp = to_iqp(ibqp);
+ enum ib_qp_state cur_state, new_state;
+ unsigned long flags;
+
+ spin_lock_irqsave(&qp->r_rq.lock, flags);
+ spin_lock(&qp->s_lock);
+
+ cur_state = attr_mask & IB_QP_CUR_STATE ?
+ attr->cur_qp_state : qp->state;
+ new_state = attr_mask & IB_QP_STATE ? attr->qp_state : cur_state;
+
+ if (!ib_modify_qp_is_ok(cur_state, new_state, ibqp->qp_type,
+ attr_mask))
+ goto inval;
+
+ switch (new_state) {
+ case IB_QPS_RESET:
+ ipath_reset_qp(qp);
+ break;
+
+ case IB_QPS_ERR:
+ ipath_error_qp(qp);
+ break;
+
+ default:
+ break;
+
+ }
+
+ if (attr_mask & IB_QP_PKEY_INDEX) {
+ struct ipath_ibdev *dev = to_idev(ibqp->device);
+
+ if (attr->pkey_index >= ipath_layer_get_npkeys(dev->dd))
+ goto inval;
+ qp->s_pkey_index = attr->pkey_index;
+ }
+
+ if (attr_mask & IB_QP_DEST_QPN)
+ qp->remote_qpn = attr->dest_qp_num;
+
+ if (attr_mask & IB_QP_SQ_PSN) {
+ qp->s_next_psn = attr->sq_psn;
+ qp->s_last_psn = qp->s_next_psn - 1;
+ }
+
+ if (attr_mask & IB_QP_RQ_PSN)
+ qp->r_psn = attr->rq_psn;
+
+ if (attr_mask & IB_QP_ACCESS_FLAGS)
+ qp->qp_access_flags = attr->qp_access_flags;
+
+ if (attr_mask & IB_QP_AV) {
+ if (attr->ah_attr.dlid == 0 ||
+ attr->ah_attr.dlid >= IPS_MULTICAST_LID_BASE)
+ goto inval;
+ qp->remote_ah_attr = attr->ah_attr;
+ }
+
+ if (attr_mask & IB_QP_PATH_MTU)
+ qp->path_mtu = attr->path_mtu;
+
+ if (attr_mask & IB_QP_RETRY_CNT)
+ qp->s_retry = qp->s_retry_cnt = attr->retry_cnt;
+
+ if (attr_mask & IB_QP_RNR_RETRY) {
+ qp->s_rnr_retry = attr->rnr_retry;
+ if (qp->s_rnr_retry > 7)
+ qp->s_rnr_retry = 7;
+ qp->s_rnr_retry_cnt = qp->s_rnr_retry;
+ }
+
+ if (attr_mask & IB_QP_MIN_RNR_TIMER) {
+ if (attr->min_rnr_timer > 31)
+ goto inval;
+ qp->s_min_rnr_timer = attr->min_rnr_timer;
+ }
+
+ if (attr_mask & IB_QP_QKEY)
+ qp->qkey = attr->qkey;
+
+ if (attr_mask & IB_QP_PKEY_INDEX)
+ qp->s_pkey_index = attr->pkey_index;
+
+ qp->state = new_state;
+ spin_unlock(&qp->s_lock);
+ spin_unlock_irqrestore(&qp->r_rq.lock, flags);
+
+ /*
+ * If QP1 changed to the RTS state, try to move to the link to INIT
+ * even if it was ACTIVE so the SM will reinitialize the SMA's
+ * state.
+ */
+ if (qp->ibqp.qp_num == 1 && new_state == IB_QPS_RTS) {
+ struct ipath_ibdev *dev = to_idev(ibqp->device);
+
+ ipath_layer_set_linkstate(dev->dd, IPATH_IB_LINKDOWN);
+ }
+ return 0;
+
+inval:
+ spin_unlock(&qp->s_lock);
+ spin_unlock_irqrestore(&qp->r_rq.lock, flags);
+ return -EINVAL;
+}
+
+int ipath_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask,
+ struct ib_qp_init_attr *init_attr)
+{
+ struct ipath_qp *qp = to_iqp(ibqp);
+
+ attr->qp_state = qp->state;
+ attr->cur_qp_state = attr->qp_state;
+ attr->path_mtu = qp->path_mtu;
+ attr->path_mig_state = 0;
+ attr->qkey = qp->qkey;
+ attr->rq_psn = qp->r_psn;
+ attr->sq_psn = qp->s_next_psn;
+ attr->dest_qp_num = qp->remote_qpn;
+ attr->qp_access_flags = qp->qp_access_flags;
+ attr->cap.max_send_wr = qp->s_size - 1;
+ attr->cap.max_recv_wr = qp->r_rq.size - 1;
+ attr->cap.max_send_sge = qp->s_max_sge;
+ attr->cap.max_recv_sge = qp->r_rq.max_sge;
+ attr->cap.max_inline_data = 0;
+ attr->ah_attr = qp->remote_ah_attr;
+ memset(&attr->alt_ah_attr, 0, sizeof(attr->alt_ah_attr));
+ attr->pkey_index = qp->s_pkey_index;
+ attr->alt_pkey_index = 0;
+ attr->en_sqd_async_notify = 0;
+ attr->sq_draining = 0;
+ attr->max_rd_atomic = 1;
+ attr->max_dest_rd_atomic = 1;
+ attr->min_rnr_timer = qp->s_min_rnr_timer;
+ attr->port_num = 1;
+ attr->timeout = 0;
+ attr->retry_cnt = qp->s_retry_cnt;
+ attr->rnr_retry = qp->s_rnr_retry;
+ attr->alt_port_num = 0;
+ attr->alt_timeout = 0;
+
+ init_attr->event_handler = qp->ibqp.event_handler;
+ init_attr->qp_context = qp->ibqp.qp_context;
+ init_attr->send_cq = qp->ibqp.send_cq;
+ init_attr->recv_cq = qp->ibqp.recv_cq;
+ init_attr->srq = qp->ibqp.srq;
+ init_attr->cap = attr->cap;
+ init_attr->sq_sig_type = (qp->s_flags & (1 << IPATH_S_SIGNAL_REQ_WR)) ?
+ IB_SIGNAL_REQ_WR : 0;
+ init_attr->qp_type = qp->ibqp.qp_type;
+ init_attr->port_num = 1;
+ return 0;
+}
+
+/**
+ * ipath_compute_aeth - compute the AETH (syndrome + MSN)
+ * @qp: the queue pair to compute the AETH for
+ *
+ * Returns the AETH.
+ *
+ * The QP s_lock should be held.
+ */
+u32 ipath_compute_aeth(struct ipath_qp *qp)
+{
+ u32 aeth = atomic_read(&qp->msn) & IPS_MSN_MASK;
+
+ if (qp->s_nak_state) {
+ aeth |= qp->s_nak_state << IPS_AETH_CREDIT_SHIFT;
+ } else if (qp->ibqp.srq) {
+ /*
+ * Shared receive queues don't generate credits.
+ * Set the credit field to the invalid value.
+ */
+ aeth |= IPS_AETH_CREDIT_INVAL << IPS_AETH_CREDIT_SHIFT;
+ } else {
+ u32 min, max, x;
+ u32 credits;
+
+ /*
+ * Compute the number of credits available (RWQEs).
+ * XXX Not holding the r_rq.lock here so there is a small
+ * chance that the pair of reads are not atomic.
+ */
+ credits = qp->r_rq.head - qp->r_rq.tail;
+ if ((int)credits < 0)
+ credits += qp->r_rq.size;
+ /*
+ * Binary search the credit table to find the code to
+ * use.
+ */
+ min = 0;
+ max = 31;
+ for (;;) {
+ x = (min + max) / 2;
+ if (credit_table[x] == credits)
+ break;
+ if (credit_table[x] > credits)
+ max = x;
+ else if (min == x)
+ break;
+ else
+ min = x;
+ }
+ aeth |= x << IPS_AETH_CREDIT_SHIFT;
+ }
+ return cpu_to_be32(aeth);
+}
+
+/**
+ * ipath_create_qp - create a queue pair for a device
+ * @ibpd: the protection domain who's device we create the queue pair for
+ * @init_attr: the attributes of the queue pair
+ * @udata: unused by InfiniPath
+ *
+ * Returns the queue pair on success, otherwise returns an errno.
+ *
+ * Called by the ib_create_qp() core verbs function.
+ */
+struct ib_qp *ipath_create_qp(struct ib_pd *ibpd,
+ struct ib_qp_init_attr *init_attr,
+ struct ib_udata *udata)
+{
+ struct ipath_qp *qp;
+ int err;
+ struct ipath_swqe *swq = NULL;
+ struct ipath_ibdev *dev;
+ size_t sz;
+
+ if (init_attr->cap.max_send_sge > 255 ||
+ init_attr->cap.max_recv_sge > 255)
+ return ERR_PTR(-ENOMEM);
+
+ switch (init_attr->qp_type) {
+ case IB_QPT_UC:
+ case IB_QPT_RC:
+ sz = sizeof(struct ipath_sge) *
+ init_attr->cap.max_send_sge +
+ sizeof(struct ipath_swqe);
+ swq = vmalloc((init_attr->cap.max_send_wr + 1) * sz);
+ if (swq == NULL)
+ return ERR_PTR(-ENOMEM);
+ /* FALLTHROUGH */
+ case IB_QPT_UD:
+ case IB_QPT_SMI:
+ case IB_QPT_GSI:
+ qp = kmalloc(sizeof(*qp), GFP_KERNEL);
+ if (!qp)
+ return ERR_PTR(-ENOMEM);
+ qp->r_rq.size = init_attr->cap.max_recv_wr + 1;
+ sz = sizeof(struct ipath_sge) *
+ init_attr->cap.max_recv_sge +
+ sizeof(struct ipath_rwqe);
+ qp->r_rq.wq = vmalloc(qp->r_rq.size * sz);
+ if (!qp->r_rq.wq) {
+ kfree(qp);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ /*
+ * ib_create_qp() will initialize qp->ibqp
+ * except for qp->ibqp.qp_num.
+ */
+ spin_lock_init(&qp->s_lock);
+ spin_lock_init(&qp->r_rq.lock);
+ atomic_set(&qp->refcount, 0);
+ init_waitqueue_head(&qp->wait);
+ tasklet_init(&qp->s_task,
+ init_attr->qp_type == IB_QPT_RC ?
+ ipath_do_rc_send : ipath_do_uc_send,
+ (unsigned long)qp);
+ qp->piowait.next = LIST_POISON1;
+ qp->piowait.prev = LIST_POISON2;
+ qp->timerwait.next = LIST_POISON1;
+ qp->timerwait.prev = LIST_POISON2;
+ qp->state = IB_QPS_RESET;
+ qp->s_wq = swq;
+ qp->s_size = init_attr->cap.max_send_wr + 1;
+ qp->s_max_sge = init_attr->cap.max_send_sge;
+ qp->r_rq.max_sge = init_attr->cap.max_recv_sge;
+ qp->s_flags = init_attr->sq_sig_type == IB_SIGNAL_REQ_WR ?
+ 1 << IPATH_S_SIGNAL_REQ_WR : 0;
+ dev = to_idev(ibpd->device);
+ err = ipath_alloc_qpn(&dev->qp_table, qp,
+ init_attr->qp_type);
+ if (err) {
+ vfree(swq);
+ vfree(qp->r_rq.wq);
+ kfree(qp);
+ return ERR_PTR(err);
+ }
+ ipath_reset_qp(qp);
+
+ /* Tell the core driver that the kernel SMA is present. */
+ if (qp->ibqp.qp_type == IB_QPT_SMI)
+ ipath_layer_set_verbs_flags(dev->dd,
+ IPATH_VERBS_KERNEL_SMA);
+ break;
+
+ default:
+ /* Don't support raw QPs */
+ return ERR_PTR(-ENOSYS);
+ }
+
+ init_attr->cap.max_inline_data = 0;
+
+ return &qp->ibqp;
+}
+
+/**
+ * ipath_destroy_qp - destroy a queue pair
+ * @ibqp: the queue pair to destroy
+ *
+ * Returns 0 on success.
+ *
+ * Note that this can be called while the QP is actively sending or
+ * receiving!
+ */
+int ipath_destroy_qp(struct ib_qp *ibqp)
+{
+ struct ipath_qp *qp = to_iqp(ibqp);
+ struct ipath_ibdev *dev = to_idev(ibqp->device);
+ unsigned long flags;
+
+ /* Tell the core driver that the kernel SMA is gone. */
+ if (qp->ibqp.qp_type == IB_QPT_SMI)
+ ipath_layer_set_verbs_flags(dev->dd, 0);
+
+ spin_lock_irqsave(&qp->r_rq.lock, flags);
+ spin_lock(&qp->s_lock);
+ qp->state = IB_QPS_ERR;
+ spin_unlock(&qp->s_lock);
+ spin_unlock_irqrestore(&qp->r_rq.lock, flags);
+
+ /* Stop the sending tasklet. */
+ tasklet_kill(&qp->s_task);
+
+ /* Make sure the QP isn't on the timeout list. */
+ spin_lock_irqsave(&dev->pending_lock, flags);
+ if (qp->timerwait.next != LIST_POISON1)
+ list_del(&qp->timerwait);
+ if (qp->piowait.next != LIST_POISON1)
+ list_del(&qp->piowait);
+ spin_unlock_irqrestore(&dev->pending_lock, flags);
+
+ /*
+ * Make sure that the QP is not in the QPN table so receive
+ * interrupts will discard packets for this QP. XXX Also remove QP
+ * from multicast table.
+ */
+ if (atomic_read(&qp->refcount) != 0)
+ ipath_free_qp(&dev->qp_table, qp);
+
+ vfree(qp->s_wq);
+ vfree(qp->r_rq.wq);
+ kfree(qp);
+ return 0;
+}
+
+/**
+ * ipath_init_qp_table - initialize the QP table for a device
+ * @idev: the device who's QP table we're initializing
+ * @size: the size of the QP table
+ *
+ * Returns 0 on success, otherwise returns an errno.
+ */
+int ipath_init_qp_table(struct ipath_ibdev *idev, int size)
+{
+ int i;
+
+ idev->qp_table.last = 1; /* QPN 0 and 1 are special. */
+ idev->qp_table.max = size;
+ idev->qp_table.nmaps = 1;
+ idev->qp_table.table = kzalloc(size * sizeof(*idev->qp_table.table),
+ GFP_KERNEL);
+ if (idev->qp_table.table == NULL)
+ return -ENOMEM;
+
+ for (i = 0; i < ARRAY_SIZE(idev->qp_table.map); i++) {
+ atomic_set(&idev->qp_table.map[i].n_free, BITS_PER_PAGE);
+ idev->qp_table.map[i].page = NULL;
+ }
+
+ return 0;
+}
+
+/**
+ * ipath_sqerror_qp - put a QP's send queue into an error state
+ * @qp: QP who's send queue will be put into an error state
+ * @wc: the WC responsible for putting the QP in this state
+ *
+ * Flushes the send work queue.
+ * The QP s_lock should be held.
+ */
+
+void ipath_sqerror_qp(struct ipath_qp *qp, struct ib_wc *wc)
+{
+ struct ipath_ibdev *dev = to_idev(qp->ibqp.device);
+ struct ipath_swqe *wqe = get_swqe_ptr(qp, qp->s_last);
+
+ _VERBS_INFO("Send queue error on QP%d/%d: err: %d\n",
+ qp->ibqp.qp_num, qp->remote_qpn, wc->status);
+
+ spin_lock(&dev->pending_lock);
+ /* XXX What if its already removed by the timeout code? */
+ if (qp->timerwait.next != LIST_POISON1)
+ list_del(&qp->timerwait);
+ if (qp->piowait.next != LIST_POISON1)
+ list_del(&qp->piowait);
+ spin_unlock(&dev->pending_lock);
+
+ ipath_cq_enter(to_icq(qp->ibqp.send_cq), wc, 1);
+ if (++qp->s_last >= qp->s_size)
+ qp->s_last = 0;
+
+ wc->status = IB_WC_WR_FLUSH_ERR;
+
+ while (qp->s_last != qp->s_head) {
+ wc->wr_id = wqe->wr.wr_id;
+ wc->opcode = ib_ipath_wc_opcode[wqe->wr.opcode];
+ ipath_cq_enter(to_icq(qp->ibqp.send_cq), wc, 1);
+ if (++qp->s_last >= qp->s_size)
+ qp->s_last = 0;
+ wqe = get_swqe_ptr(qp, qp->s_last);
+ }
+ qp->s_cur = qp->s_tail = qp->s_head;
+ qp->state = IB_QPS_SQE;
+}
+
+/**
+ * ipath_error_qp - put a QP into an error state
+ * @qp: the QP to put into an error state
+ *
+ * Flushes both send and receive work queues.
+ * QP r_rq.lock and s_lock should be held.
+ */
+
+void ipath_error_qp(struct ipath_qp *qp)
+{
+ struct ipath_ibdev *dev = to_idev(qp->ibqp.device);
+ struct ib_wc wc;
+
+ _VERBS_INFO("QP%d/%d in error state\n",
+ qp->ibqp.qp_num, qp->remote_qpn);
+
+ spin_lock(&dev->pending_lock);
+ /* XXX What if its already removed by the timeout code? */
+ if (qp->timerwait.next != LIST_POISON1)
+ list_del(&qp->timerwait);
+ if (qp->piowait.next != LIST_POISON1)
+ list_del(&qp->piowait);
+ spin_unlock(&dev->pending_lock);
+
+ wc.status = IB_WC_WR_FLUSH_ERR;
+ wc.vendor_err = 0;
+ wc.byte_len = 0;
+ wc.imm_data = 0;
+ wc.qp_num = qp->ibqp.qp_num;
+ wc.src_qp = 0;
+ wc.wc_flags = 0;
+ wc.pkey_index = 0;
+ wc.slid = 0;
+ wc.sl = 0;
+ wc.dlid_path_bits = 0;
+ wc.port_num = 0;
+
+ while (qp->s_last != qp->s_head) {
+ struct ipath_swqe *wqe = get_swqe_ptr(qp, qp->s_last);
+
+ wc.wr_id = wqe->wr.wr_id;
+ wc.opcode = ib_ipath_wc_opcode[wqe->wr.opcode];
+ if (++qp->s_last >= qp->s_size)
+ qp->s_last = 0;
+ ipath_cq_enter(to_icq(qp->ibqp.send_cq), &wc, 1);
+ }
+ qp->s_cur = qp->s_tail = qp->s_head;
+ qp->s_hdrwords = 0;
+ qp->s_ack_state = IB_OPCODE_RC_ACKNOWLEDGE;
+
+ wc.opcode = IB_WC_RECV;
+ while (qp->r_rq.tail != qp->r_rq.head) {
+ wc.wr_id = get_rwqe_ptr(&qp->r_rq, qp->r_rq.tail)->wr_id;
+ if (++qp->r_rq.tail >= qp->r_rq.size)
+ qp->r_rq.tail = 0;
+ ipath_cq_enter(to_icq(qp->ibqp.recv_cq), &wc, 1);
+ }
+}
+
+/**
+ * ipath_get_credit - flush the send work queue of a QP
+ * @qp: the qp who's send work queue to flush
+ * @aeth: the Acknowledge Extended Transport Header
+ *
+ * The QP s_lock should be held.
+ */
+void ipath_get_credit(struct ipath_qp *qp, u32 aeth)
+{
+ u32 credit = (aeth >> IPS_AETH_CREDIT_SHIFT) & IPS_AETH_CREDIT_MASK;
+
+ /*
+ * If the credit is invalid, we can send
+ * as many packets as we like. Otherwise, we have to
+ * honor the credit field.
+ */
+ if (credit == IPS_AETH_CREDIT_INVAL) {
+ qp->s_lsn = (u32) -1;
+ } else if (qp->s_lsn != (u32) -1) {
+ /* Compute new LSN (i.e., MSN + credit) */
+ credit = (aeth + credit_table[credit]) & IPS_MSN_MASK;
+ if (ipath_cmp24(credit, qp->s_lsn) > 0)
+ qp->s_lsn = credit;
+ }
+
+ /* Restart sending if it was blocked due to lack of credits. */
+ if (qp->s_cur != qp->s_head &&
+ (qp->s_lsn == (u32) -1 ||
+ ipath_cmp24(get_swqe_ptr(qp, qp->s_cur)->ssn,
+ qp->s_lsn + 1) <= 0))
+ tasklet_hi_schedule(&qp->s_task);
+}
diff -r 44cd07539d66 -r f57c24166c57 drivers/infiniband/hw/ipath/ipath_ruc.c
--- /dev/null Thu Jan 1 00:00:00 1970 +0000
+++ b/drivers/infiniband/hw/ipath/ipath_ruc.c Thu Mar 9 16:16:51 2006 -0800
@@ -0,0 +1,530 @@
+/*
+ * Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "ipath_verbs.h"
+
+/*
+ * Convert the AETH RNR timeout code into the number of milliseconds.
+ */
+const u32 ib_ipath_rnr_table[32] = {
+ 656, /* 0 */
+ 1, /* 1 */
+ 1, /* 2 */
+ 1, /* 3 */
+ 1, /* 4 */
+ 1, /* 5 */
+ 1, /* 6 */
+ 1, /* 7 */
+ 1, /* 8 */
+ 1, /* 9 */
+ 1, /* A */
+ 1, /* B */
+ 1, /* C */
+ 1, /* D */
+ 2, /* E */
+ 2, /* F */
+ 3, /* 10 */
+ 4, /* 11 */
+ 6, /* 12 */
+ 8, /* 13 */
+ 11, /* 14 */
+ 16, /* 15 */
+ 21, /* 16 */
+ 31, /* 17 */
+ 41, /* 18 */
+ 62, /* 19 */
+ 82, /* 1A */
+ 123, /* 1B */
+ 164, /* 1C */
+ 246, /* 1D */
+ 328, /* 1E */
+ 492 /* 1F */
+};
+
+/**
+ * ipath_insert_rnr_queue - put this QP on the RNR timeout list for the device
+ * @qp: the QP
+ *
+ * XXX Use a simple list for now. We might need a priority
+ * queue if we have lots of QPs waiting for RNR timeouts
+ * but that should be rare.
+ */
+void ipath_insert_rnr_queue(struct ipath_qp *qp)
+{
+ struct ipath_ibdev *dev = to_idev(qp->ibqp.device);
+ unsigned long flags;
+
+ spin_lock_irqsave(&dev->pending_lock, flags);
+ if (list_empty(&dev->rnrwait))
+ list_add(&qp->timerwait, &dev->rnrwait);
+ else {
+ struct list_head *l = &dev->rnrwait;
+ struct ipath_qp *nqp = list_entry(l->next, struct ipath_qp,
+ timerwait);
+
+ while (qp->s_rnr_timeout >= nqp->s_rnr_timeout) {
+ qp->s_rnr_timeout -= nqp->s_rnr_timeout;
+ l = l->next;
+ if (l->next == &dev->rnrwait)
+ break;
+ nqp = list_entry(l->next, struct ipath_qp,
+ timerwait);
+ }
+ list_add(&qp->timerwait, l);
+ }
+ spin_unlock_irqrestore(&dev->pending_lock, flags);
+}
+
+/**
+ * ipath_get_rwqe - copy the next RWQE into the QP's RWQE
+ * @qp: the QP
+ * @wr_id_only: update wr_id only, not SGEs
+ *
+ * Return 0 if no RWQE is available, otherwise return 1.
+ *
+ * Called at interrupt level with the QP r_rq.lock held.
+ */
+int ipath_get_rwqe(struct ipath_qp *qp, int wr_id_only)
+{
+ struct ipath_rq *rq;
+ struct ipath_srq *srq;
+ struct ipath_rwqe *wqe;
+
+ if (!qp->ibqp.srq) {
+ rq = &qp->r_rq;
+ if (unlikely(rq->tail == rq->head))
+ return 0;
+ wqe = get_rwqe_ptr(rq, rq->tail);
+ qp->r_wr_id = wqe->wr_id;
+ if (!wr_id_only) {
+ qp->r_sge.sge = wqe->sg_list[0];
+ qp->r_sge.sg_list = wqe->sg_list + 1;
+ qp->r_sge.num_sge = wqe->num_sge;
+ qp->r_len = wqe->length;
+ }
+ if (++rq->tail >= rq->size)
+ rq->tail = 0;
+ return 1;
+ }
+
+ srq = to_isrq(qp->ibqp.srq);
+ rq = &srq->rq;
+ spin_lock(&rq->lock);
+ if (unlikely(rq->tail == rq->head)) {
+ spin_unlock(&rq->lock);
+ return 0;
+ }
+ wqe = get_rwqe_ptr(rq, rq->tail);
+ qp->r_wr_id = wqe->wr_id;
+ if (!wr_id_only) {
+ qp->r_sge.sge = wqe->sg_list[0];
+ qp->r_sge.sg_list = wqe->sg_list + 1;
+ qp->r_sge.num_sge = wqe->num_sge;
+ qp->r_len = wqe->length;
+ }
+ if (++rq->tail >= rq->size)
+ rq->tail = 0;
+ if (srq->ibsrq.event_handler) {
+ struct ib_event ev;
+ u32 n;
+
+ if (rq->head < rq->tail)
+ n = rq->size + rq->head - rq->tail;
+ else
+ n = rq->head - rq->tail;
+ if (n < srq->limit) {
+ srq->limit = 0;
+ spin_unlock(&rq->lock);
+ ev.device = qp->ibqp.device;
+ ev.element.srq = qp->ibqp.srq;
+ ev.event = IB_EVENT_SRQ_LIMIT_REACHED;
+ srq->ibsrq.event_handler(&ev,
+ srq->ibsrq.srq_context);
+ } else
+ spin_unlock(&rq->lock);
+ } else
+ spin_unlock(&rq->lock);
+ return 1;
+}
+
+/**
+ * ipath_ruc_loopback - handle UC and RC lookback requests
+ * @sqp: the loopback QP
+ * @wc: the work completion entry
+ *
+ * This is called from ipath_do_uc_send() or ipath_do_rc_send() to
+ * forward a WQE addressed to the same HCA.
+ * Note that although we are single threaded due to the tasklet, we still
+ * have to protect against post_send(). We don't have to worry about
+ * receive interrupts since this is a connected protocol and all packets
+ * will pass through here.
+ */
+void ipath_ruc_loopback(struct ipath_qp *sqp, struct ib_wc *wc)
+{
+ struct ipath_ibdev *dev = to_idev(sqp->ibqp.device);
+ struct ipath_qp *qp;
+ struct ipath_swqe *wqe;
+ struct ipath_sge *sge;
+ unsigned long flags;
+ u64 sdata;
+
+ qp = ipath_lookup_qpn(&dev->qp_table, sqp->remote_qpn);
+ if (!qp) {
+ dev->n_pkt_drops++;
+ return;
+ }
+
+again:
+ spin_lock_irqsave(&sqp->s_lock, flags);
+
+ if (!(ib_ipath_state_ops[sqp->state] & IPATH_PROCESS_SEND_OK)) {
+ spin_unlock_irqrestore(&sqp->s_lock, flags);
+ goto done;
+ }
+
+ /* Get the next send request. */
+ if (sqp->s_last == sqp->s_head) {
+ /* Send work queue is empty. */
+ spin_unlock_irqrestore(&sqp->s_lock, flags);
+ goto done;
+ }
+
+ /*
+ * We can rely on the entry not changing without the s_lock
+ * being held until we update s_last.
+ */
+ wqe = get_swqe_ptr(sqp, sqp->s_last);
+ spin_unlock_irqrestore(&sqp->s_lock, flags);
+
+ wc->wc_flags = 0;
+ wc->imm_data = 0;
+
+ sqp->s_sge.sge = wqe->sg_list[0];
+ sqp->s_sge.sg_list = wqe->sg_list + 1;
+ sqp->s_sge.num_sge = wqe->wr.num_sge;
+ sqp->s_len = wqe->length;
+ switch (wqe->wr.opcode) {
+ case IB_WR_SEND_WITH_IMM:
+ wc->wc_flags = IB_WC_WITH_IMM;
+ wc->imm_data = wqe->wr.imm_data;
+ /* FALLTHROUGH */
+ case IB_WR_SEND:
+ spin_lock_irqsave(&qp->r_rq.lock, flags);
+ if (!ipath_get_rwqe(qp, 0)) {
+ rnr_nak:
+ spin_unlock_irqrestore(&qp->r_rq.lock, flags);
+ /* Handle RNR NAK */
+ if (qp->ibqp.qp_type == IB_QPT_UC)
+ goto send_comp;
+ if (sqp->s_rnr_retry == 0) {
+ wc->status = IB_WC_RNR_RETRY_EXC_ERR;
+ goto err;
+ }
+ if (sqp->s_rnr_retry_cnt < 7)
+ sqp->s_rnr_retry--;
+ dev->n_rnr_naks++;
+ sqp->s_rnr_timeout =
+ ib_ipath_rnr_table[sqp->s_min_rnr_timer];
+ ipath_insert_rnr_queue(sqp);
+ goto done;
+ }
+ spin_unlock_irqrestore(&qp->r_rq.lock, flags);
+ break;
+
+ case IB_WR_RDMA_WRITE_WITH_IMM:
+ wc->wc_flags = IB_WC_WITH_IMM;
+ wc->imm_data = wqe->wr.imm_data;
+ spin_lock_irqsave(&qp->r_rq.lock, flags);
+ if (!ipath_get_rwqe(qp, 1))
+ goto rnr_nak;
+ spin_unlock_irqrestore(&qp->r_rq.lock, flags);
+ /* FALLTHROUGH */
+ case IB_WR_RDMA_WRITE:
+ if (wqe->length == 0)
+ break;
+ if (unlikely(!ipath_rkey_ok(dev, &qp->r_sge, wqe->length,
+ wqe->wr.wr.rdma.remote_addr,
+ wqe->wr.wr.rdma.rkey,
+ IB_ACCESS_REMOTE_WRITE))) {
+ acc_err:
+ wc->status = IB_WC_REM_ACCESS_ERR;
+ err:
+ wc->wr_id = wqe->wr.wr_id;
+ wc->opcode = ib_ipath_wc_opcode[wqe->wr.opcode];
+ wc->vendor_err = 0;
+ wc->byte_len = 0;
+ wc->qp_num = sqp->ibqp.qp_num;
+ wc->src_qp = sqp->remote_qpn;
+ wc->pkey_index = 0;
+ wc->slid = sqp->remote_ah_attr.dlid;
+ wc->sl = sqp->remote_ah_attr.sl;
+ wc->dlid_path_bits = 0;
+ wc->port_num = 0;
+ ipath_sqerror_qp(sqp, wc);
+ goto done;
+ }
+ break;
+
+ case IB_WR_RDMA_READ:
+ if (unlikely(!ipath_rkey_ok(dev, &sqp->s_sge, wqe->length,
+ wqe->wr.wr.rdma.remote_addr,
+ wqe->wr.wr.rdma.rkey,
+ IB_ACCESS_REMOTE_READ)))
+ goto acc_err;
+ if (unlikely(!(qp->qp_access_flags &
+ IB_ACCESS_REMOTE_READ)))
+ goto acc_err;
+ qp->r_sge.sge = wqe->sg_list[0];
+ qp->r_sge.sg_list = wqe->sg_list + 1;
+ qp->r_sge.num_sge = wqe->wr.num_sge;
+ break;
+
+ case IB_WR_ATOMIC_CMP_AND_SWP:
+ case IB_WR_ATOMIC_FETCH_AND_ADD:
+ if (unlikely(!ipath_rkey_ok(dev, &qp->r_sge, sizeof(u64),
+ wqe->wr.wr.rdma.remote_addr,
+ wqe->wr.wr.rdma.rkey,
+ IB_ACCESS_REMOTE_ATOMIC)))
+ goto acc_err;
+ /* Perform atomic OP and save result. */
+ sdata = wqe->wr.wr.atomic.swap;
+ spin_lock_irqsave(&dev->pending_lock, flags);
+ qp->r_atomic_data = *(u64 *) qp->r_sge.sge.vaddr;
+ if (wqe->wr.opcode == IB_WR_ATOMIC_FETCH_AND_ADD)
+ *(u64 *) qp->r_sge.sge.vaddr =
+ qp->r_atomic_data + sdata;
+ else if (qp->r_atomic_data == wqe->wr.wr.atomic.compare_add)
+ *(u64 *) qp->r_sge.sge.vaddr = sdata;
+ spin_unlock_irqrestore(&dev->pending_lock, flags);
+ *(u64 *) sqp->s_sge.sge.vaddr = qp->r_atomic_data;
+ goto send_comp;
+
+ default:
+ goto done;
+ }
+
+ sge = &sqp->s_sge.sge;
+ while (sqp->s_len) {
+ u32 len = sqp->s_len;
+
+ if (len > sge->length)
+ len = sge->length;
+ BUG_ON(len == 0);
+ ipath_copy_sge(&qp->r_sge, sge->vaddr, len);
+ sge->vaddr += len;
+ sge->length -= len;
+ sge->sge_length -= len;
+ if (sge->sge_length == 0) {
+ if (--sqp->s_sge.num_sge)
+ *sge = *sqp->s_sge.sg_list++;
+ } else if (sge->length == 0 && sge->mr != NULL) {
+ if (++sge->n >= IPATH_SEGSZ) {
+ if (++sge->m >= sge->mr->mapsz)
+ break;
+ sge->n = 0;
+ }
+ sge->vaddr =
+ sge->mr->map[sge->m]->segs[sge->n].vaddr;
+ sge->length =
+ sge->mr->map[sge->m]->segs[sge->n].length;
+ }
+ sqp->s_len -= len;
+ }
+
+ if (wqe->wr.opcode == IB_WR_RDMA_WRITE ||
+ wqe->wr.opcode == IB_WR_RDMA_READ)
+ goto send_comp;
+
+ if (wqe->wr.opcode == IB_WR_RDMA_WRITE_WITH_IMM)
+ wc->opcode = IB_WC_RECV_RDMA_WITH_IMM;
+ else
+ wc->opcode = IB_WC_RECV;
+ wc->wr_id = qp->r_wr_id;
+ wc->status = IB_WC_SUCCESS;
+ wc->vendor_err = 0;
+ wc->byte_len = wqe->length;
+ wc->qp_num = qp->ibqp.qp_num;
+ wc->src_qp = qp->remote_qpn;
+ /* XXX do we know which pkey matched? Only needed for GSI. */
+ wc->pkey_index = 0;
+ wc->slid = qp->remote_ah_attr.dlid;
+ wc->sl = qp->remote_ah_attr.sl;
+ wc->dlid_path_bits = 0;
+ /* Signal completion event if the solicited bit is set. */
+ ipath_cq_enter(to_icq(qp->ibqp.recv_cq), wc,
+ wqe->wr.send_flags & IB_SEND_SOLICITED);
+
+send_comp:
+ sqp->s_rnr_retry = sqp->s_rnr_retry_cnt;
+
+ if (!test_bit(IPATH_S_SIGNAL_REQ_WR, &sqp->s_flags) ||
+ (wqe->wr.send_flags & IB_SEND_SIGNALED)) {
+ wc->wr_id = wqe->wr.wr_id;
+ wc->status = IB_WC_SUCCESS;
+ wc->opcode = ib_ipath_wc_opcode[wqe->wr.opcode];
+ wc->vendor_err = 0;
+ wc->byte_len = wqe->length;
+ wc->qp_num = sqp->ibqp.qp_num;
+ wc->src_qp = 0;
+ wc->pkey_index = 0;
+ wc->slid = 0;
+ wc->sl = 0;
+ wc->dlid_path_bits = 0;
+ wc->port_num = 0;
+ ipath_cq_enter(to_icq(sqp->ibqp.send_cq), wc, 0);
+ }
+
+ /* Update s_last now that we are finished with the SWQE */
+ spin_lock_irqsave(&sqp->s_lock, flags);
+ if (++sqp->s_last >= sqp->s_size)
+ sqp->s_last = 0;
+ spin_unlock_irqrestore(&sqp->s_lock, flags);
+ goto again;
+
+done:
+ if (atomic_dec_and_test(&qp->refcount))
+ wake_up(&qp->wait);
+}
+
+/**
+ * ipath_no_bufs_available - tell the layer driver we need buffers
+ * @qp: the QP that caused the problem
+ * @dev: the device we ran out of buffers on
+ *
+ * Called when we run out of PIO buffers.
+ */
+void ipath_no_bufs_available(struct ipath_qp *qp, struct ipath_ibdev *dev)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&dev->pending_lock, flags);
+ if (qp->piowait.next == LIST_POISON1)
+ list_add_tail(&qp->piowait, &dev->piowait);
+ spin_unlock_irqrestore(&dev->pending_lock, flags);
+ /*
+ * Note that as soon as ipath_layer_want_buffer() is called and
+ * possibly before it returns, ipath_ib_piobufavail()
+ * could be called. If we are still in the tasklet function,
+ * tasklet_hi_schedule() will not call us until the next time
+ * tasklet_hi_schedule() is called.
+ * We clear the tasklet flag now since we are committing to return
+ * from the tasklet function.
+ */
+ clear_bit(IPATH_S_BUSY, &qp->s_flags);
+ tasklet_unlock(&qp->s_task);
+ ipath_layer_want_buffer(dev->dd);
+ dev->n_piowait++;
+}
+
+/**
+ * ipath_post_rc_send - post RC and UC sends
+ * @qp: the QP to post on
+ * @wr: the work request to send
+ */
+int ipath_post_rc_send(struct ipath_qp *qp, struct ib_send_wr *wr)
+{
+ struct ipath_swqe *wqe;
+ unsigned long flags;
+ u32 next;
+ int i, j;
+ int acc;
+
+ /*
+ * Don't allow RDMA reads or atomic operations on UC or
+ * undefined operations.
+ * Make sure buffer is large enough to hold the result for atomics.
+ */
+ if (qp->ibqp.qp_type == IB_QPT_UC) {
+ if ((unsigned) wr->opcode >= IB_WR_RDMA_READ)
+ return -EINVAL;
+ } else if ((unsigned) wr->opcode > IB_WR_ATOMIC_FETCH_AND_ADD)
+ return -EINVAL;
+ else if (wr->opcode >= IB_WR_ATOMIC_CMP_AND_SWP &&
+ (wr->num_sge == 0 || wr->sg_list[0].length < sizeof(u64) ||
+ wr->sg_list[0].addr & (sizeof(u64) - 1)))
+ return -EINVAL;
+
+ /* IB spec says that num_sge == 0 is OK. */
+ if (wr->num_sge > qp->s_max_sge)
+ return -ENOMEM;
+
+ spin_lock_irqsave(&qp->s_lock, flags);
+ next = qp->s_head + 1;
+ if (next >= qp->s_size)
+ next = 0;
+ if (next == qp->s_last) {
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ return -EINVAL;
+ }
+
+ wqe = get_swqe_ptr(qp, qp->s_head);
+ wqe->wr = *wr;
+ wqe->ssn = qp->s_ssn++;
+ wqe->sg_list[0].mr = NULL;
+ wqe->sg_list[0].vaddr = NULL;
+ wqe->sg_list[0].length = 0;
+ wqe->sg_list[0].sge_length = 0;
+ wqe->length = 0;
+ acc = wr->opcode >= IB_WR_RDMA_READ ? IB_ACCESS_LOCAL_WRITE : 0;
+ for (i = 0, j = 0; i < wr->num_sge; i++) {
+ if (to_ipd(qp->ibqp.pd)->user && wr->sg_list[i].lkey == 0) {
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ return -EINVAL;
+ }
+ if (wr->sg_list[i].length == 0)
+ continue;
+ if (!ipath_lkey_ok(&to_idev(qp->ibqp.device)->lk_table,
+ &wqe->sg_list[j], &wr->sg_list[i],
+ acc)) {
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ return -EINVAL;
+ }
+ wqe->length += wr->sg_list[i].length;
+ j++;
+ }
+ wqe->wr.num_sge = j;
+ qp->s_head = next;
+ /*
+ * Wake up the send tasklet if the QP is not waiting
+ * for an RNR timeout.
+ */
+ next = qp->s_rnr_timeout;
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+
+ if (next == 0) {
+ if (qp->ibqp.qp_type == IB_QPT_UC)
+ ipath_do_uc_send((unsigned long) qp);
+ else
+ ipath_do_rc_send((unsigned long) qp);
+ }
+ return 0;
+}
^ permalink raw reply [flat|nested] 70+ messages in thread* [PATCH 17 of 20] ipath - infiniband verbs support
2006-03-10 0:35 [PATCH 0 of 20] [RFC] ipath driver - another round for review Bryan O'Sullivan
` (15 preceding siblings ...)
2006-03-10 0:35 ` [PATCH 16 of 20] ipath - misc infiniband code, part 2 Bryan O'Sullivan
@ 2006-03-10 0:35 ` Bryan O'Sullivan
2006-03-10 0:35 ` [PATCH 18 of 20] ipath - kbuild infrastructure Bryan O'Sullivan
` (3 subsequent siblings)
20 siblings, 0 replies; 70+ messages in thread
From: Bryan O'Sullivan @ 2006-03-10 0:35 UTC (permalink / raw)
To: rolandd, gregkh, akpm, davem; +Cc: linux-kernel, openib-general
Signed-off-by: Bryan O'Sullivan <bos@pathscale.com>
diff -r f57c24166c57 -r 1c88f73c2ac0 drivers/infiniband/hw/ipath/ipath_verbs.c
--- /dev/null Thu Jan 1 00:00:00 1970 +0000
+++ b/drivers/infiniband/hw/ipath/ipath_verbs.c Thu Mar 9 16:16:58 2006 -0800
@@ -0,0 +1,1195 @@
+/*
+ * Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <rdma/ib_mad.h>
+#include <rdma/ib_user_verbs.h>
+#include <linux/utsname.h>
+
+#include "ipath_kernel.h"
+#include "ipath_verbs.h"
+#include "ips_common.h"
+
+/* Not static, because we don't want the compiler removing it */
+const char ipath_verbs_version[] = "ipath_verbs " IPATH_IDSTR;
+
+unsigned int ib_ipath_qp_table_size = 251;
+module_param_named(qp_table_size, ib_ipath_qp_table_size, uint, S_IRUGO);
+MODULE_PARM_DESC(qp_table_size, "QP table size");
+
+unsigned int ib_ipath_lkey_table_size = 12;
+module_param_named(lkey_table_size, ib_ipath_lkey_table_size, uint,
+ S_IRUGO);
+MODULE_PARM_DESC(lkey_table_size,
+ "LKEY table size in bits (2^n, 1 <= n <= 23)");
+
+unsigned int ib_ipath_debug; /* debug mask */
+module_param_named(debug, ib_ipath_debug, uint, S_IWUSR | S_IRUGO);
+MODULE_PARM_DESC(debug, "Verbs debug mask");
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("PathScale <support@pathscale.com>");
+MODULE_DESCRIPTION("Pathscale InfiniPath driver");
+
+const int ib_ipath_state_ops[IB_QPS_ERR + 1] = {
+ [IB_QPS_RESET] = 0,
+ [IB_QPS_INIT] = IPATH_POST_RECV_OK,
+ [IB_QPS_RTR] = IPATH_POST_RECV_OK | IPATH_PROCESS_RECV_OK,
+ [IB_QPS_RTS] = IPATH_POST_RECV_OK | IPATH_PROCESS_RECV_OK |
+ IPATH_POST_SEND_OK | IPATH_PROCESS_SEND_OK,
+ [IB_QPS_SQD] = IPATH_POST_RECV_OK | IPATH_PROCESS_RECV_OK |
+ IPATH_POST_SEND_OK,
+ [IB_QPS_SQE] = IPATH_POST_RECV_OK | IPATH_PROCESS_RECV_OK,
+ [IB_QPS_ERR] = 0,
+};
+
+/*
+ * Translate ib_wr_opcode into ib_wc_opcode.
+ */
+const enum ib_wc_opcode ib_ipath_wc_opcode[] = {
+ [IB_WR_RDMA_WRITE] = IB_WC_RDMA_WRITE,
+ [IB_WR_RDMA_WRITE_WITH_IMM] = IB_WC_RDMA_WRITE,
+ [IB_WR_SEND] = IB_WC_SEND,
+ [IB_WR_SEND_WITH_IMM] = IB_WC_SEND,
+ [IB_WR_RDMA_READ] = IB_WC_RDMA_READ,
+ [IB_WR_ATOMIC_CMP_AND_SWP] = IB_WC_COMP_SWAP,
+ [IB_WR_ATOMIC_FETCH_AND_ADD] = IB_WC_FETCH_ADD
+};
+
+/*
+ * Array of device pointers.
+ */
+static u32 number_of_devices;
+static struct ipath_ibdev **ipath_devices;
+
+/**
+ * ipath_copy_sge - copy data to SGE memory
+ * @ss: the SGE state
+ * @data: the data to copy
+ * @length: the length of the data
+ */
+void ipath_copy_sge(struct ipath_sge_state *ss, void *data, u32 length)
+{
+ struct ipath_sge *sge = &ss->sge;
+
+ while (length) {
+ u32 len = sge->length;
+
+ BUG_ON(len == 0);
+ if (len > length)
+ len = length;
+ memcpy(sge->vaddr, data, len);
+ sge->vaddr += len;
+ sge->length -= len;
+ sge->sge_length -= len;
+ if (sge->sge_length == 0) {
+ if (--ss->num_sge)
+ *sge = *ss->sg_list++;
+ } else if (sge->length == 0 && sge->mr != NULL) {
+ if (++sge->n >= IPATH_SEGSZ) {
+ if (++sge->m >= sge->mr->mapsz)
+ break;
+ sge->n = 0;
+ }
+ sge->vaddr =
+ sge->mr->map[sge->m]->segs[sge->n].vaddr;
+ sge->length =
+ sge->mr->map[sge->m]->segs[sge->n].length;
+ }
+ data += len;
+ length -= len;
+ }
+}
+
+/**
+ * ipath_skip_sge - skip over SGE memory - XXX almost dup of prev func
+ * @ss: the SGE state
+ * @length: the number of bytes to skip
+ */
+void ipath_skip_sge(struct ipath_sge_state *ss, u32 length)
+{
+ struct ipath_sge *sge = &ss->sge;
+
+ while (length > sge->sge_length) {
+ length -= sge->sge_length;
+ ss->sge = *ss->sg_list++;
+ }
+ while (length) {
+ u32 len = sge->length;
+
+ BUG_ON(len == 0);
+ if (len > length)
+ len = length;
+ sge->vaddr += len;
+ sge->length -= len;
+ sge->sge_length -= len;
+ if (sge->sge_length == 0) {
+ if (--ss->num_sge)
+ *sge = *ss->sg_list++;
+ } else if (sge->length == 0 && sge->mr != NULL) {
+ if (++sge->n >= IPATH_SEGSZ) {
+ if (++sge->m >= sge->mr->mapsz)
+ break;
+ sge->n = 0;
+ }
+ sge->vaddr =
+ sge->mr->map[sge->m]->segs[sge->n].vaddr;
+ sge->length =
+ sge->mr->map[sge->m]->segs[sge->n].length;
+ }
+ length -= len;
+ }
+}
+
+/**
+ * ipath_post_send - post a send on a QP
+ * @ibqp: the QP to post the send on
+ * @wr: the list of work requests to post
+ * @bad_wr: the first bad WR is put here
+ *
+ * This may be called from interrupt context.
+ */
+static int ipath_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
+ struct ib_send_wr **bad_wr)
+{
+ struct ipath_qp *qp = to_iqp(ibqp);
+ int err = 0;
+
+ /* Check that state is OK to post send. */
+ if (!(ib_ipath_state_ops[qp->state] & IPATH_POST_SEND_OK)) {
+ *bad_wr = wr;
+ return -EINVAL;
+ }
+
+ for (; wr; wr = wr->next) {
+ switch (qp->ibqp.qp_type) {
+ case IB_QPT_UC:
+ case IB_QPT_RC:
+ err = ipath_post_rc_send(qp, wr);
+ break;
+
+ case IB_QPT_SMI:
+ case IB_QPT_GSI:
+ case IB_QPT_UD:
+ err = ipath_post_ud_send(qp, wr);
+ break;
+
+ default:
+ err = -EINVAL;
+ }
+ if (err) {
+ *bad_wr = wr;
+ break;
+ }
+ }
+ return err;
+}
+
+/**
+ * ipath_post_receive - post a receive on a QP
+ * @ibqp: the QP to post the receive on
+ * @wr: the WR to post
+ * @bad_wr: the first bad WR is put here
+ *
+ * This may be called from interrupt context.
+ */
+static int ipath_post_receive(struct ib_qp *ibqp, struct ib_recv_wr *wr,
+ struct ib_recv_wr **bad_wr)
+{
+ struct ipath_qp *qp = to_iqp(ibqp);
+ unsigned long flags;
+
+ /* Check that state is OK to post receive. */
+ if (!(ib_ipath_state_ops[qp->state] & IPATH_POST_RECV_OK)) {
+ *bad_wr = wr;
+ return -EINVAL;
+ }
+
+ for (; wr; wr = wr->next) {
+ struct ipath_rwqe *wqe;
+ u32 next;
+ int i, j;
+
+ if (wr->num_sge > qp->r_rq.max_sge) {
+ *bad_wr = wr;
+ return -ENOMEM;
+ }
+
+ spin_lock_irqsave(&qp->r_rq.lock, flags);
+ next = qp->r_rq.head + 1;
+ if (next >= qp->r_rq.size)
+ next = 0;
+ if (next == qp->r_rq.tail) {
+ spin_unlock_irqrestore(&qp->r_rq.lock, flags);
+ *bad_wr = wr;
+ return -ENOMEM;
+ }
+
+ wqe = get_rwqe_ptr(&qp->r_rq, qp->r_rq.head);
+ wqe->wr_id = wr->wr_id;
+ wqe->sg_list[0].mr = NULL;
+ wqe->sg_list[0].vaddr = NULL;
+ wqe->sg_list[0].length = 0;
+ wqe->sg_list[0].sge_length = 0;
+ wqe->length = 0;
+ for (i = 0, j = 0; i < wr->num_sge; i++) {
+ /* Check LKEY */
+ if (to_ipd(qp->ibqp.pd)->user &&
+ wr->sg_list[i].lkey == 0) {
+ spin_unlock_irqrestore(&qp->r_rq.lock,
+ flags);
+ *bad_wr = wr;
+ return -EINVAL;
+ }
+ if (wr->sg_list[i].length == 0)
+ continue;
+ if (!ipath_lkey_ok(
+ &to_idev(qp->ibqp.device)->lk_table,
+ &wqe->sg_list[j], &wr->sg_list[i],
+ IB_ACCESS_LOCAL_WRITE)) {
+ spin_unlock_irqrestore(&qp->r_rq.lock,
+ flags);
+ *bad_wr = wr;
+ return -EINVAL;
+ }
+ wqe->length += wr->sg_list[i].length;
+ j++;
+ }
+ wqe->num_sge = j;
+ qp->r_rq.head = next;
+ spin_unlock_irqrestore(&qp->r_rq.lock, flags);
+ }
+ return 0;
+}
+
+/**
+ * ipath_qp_rcv - processing an incoming packet on a QP
+ * @dev: the device the packet came on
+ * @hdr: the packet header
+ * @has_grh: true if the packet has a GRH
+ * @data: the packet data
+ * @tlen: the packet length
+ * @qp: the QP the packet came on
+ *
+ * This is called from ipath_ib_rcv() to process an incoming packet
+ * for the given QP.
+ * Called at interrupt level.
+ */
+static inline void ipath_qp_rcv(struct ipath_ibdev *dev,
+ struct ipath_ib_header *hdr, int has_grh,
+ void *data, u32 tlen, struct ipath_qp *qp)
+{
+ /* Check for valid receive state. */
+ if (!(ib_ipath_state_ops[qp->state] & IPATH_PROCESS_RECV_OK)) {
+ dev->n_pkt_drops++;
+ return;
+ }
+
+ switch (qp->ibqp.qp_type) {
+ case IB_QPT_SMI:
+ case IB_QPT_GSI:
+ case IB_QPT_UD:
+ ipath_ud_rcv(dev, hdr, has_grh, data, tlen, qp);
+ break;
+
+ case IB_QPT_RC:
+ ipath_rc_rcv(dev, hdr, has_grh, data, tlen, qp);
+ break;
+
+ case IB_QPT_UC:
+ ipath_uc_rcv(dev, hdr, has_grh, data, tlen, qp);
+ break;
+
+ default:
+ break;
+ }
+}
+
+/**
+ * ipath_ib_rcv - process and incoming packet
+ * @t: the device number
+ * @rhdr: the header of the packet
+ * @data: the packet data
+ * @tlen: the packet length
+ *
+ * This is called from ipath_kreceive() to process an incoming packet at
+ * interrupt level. Tlen is the length of the header + data + CRC in bytes.
+ */
+static void ipath_ib_rcv(int t, void *rhdr, void *data, u32 tlen)
+{
+ struct ipath_ibdev *dev = ipath_devices[t];
+ struct ipath_ib_header *hdr = rhdr;
+ struct ipath_other_headers *ohdr;
+ struct ipath_qp *qp;
+ u32 qp_num;
+ int lnh;
+ u8 opcode;
+ u16 lid;
+
+ if (unlikely(dev == NULL))
+ return;
+
+ if (unlikely(tlen < 24)) { /* LRH+BTH+CRC */
+ dev->rcv_errors++;
+ return;
+ }
+
+ /* Check for a valid destination LID (see ch. 7.11.1). */
+ lid = be16_to_cpu(hdr->lrh[1]);
+ if (lid < IPS_MULTICAST_LID_BASE) {
+ lid &= ~((1 << (dev->mkeyprot_resv_lmc & 7)) - 1);
+ if (unlikely(lid != ipath_layer_get_lid(dev->dd))) {
+ dev->rcv_errors++;
+ return;
+ }
+ }
+
+ /* Check for GRH */
+ lnh = be16_to_cpu(hdr->lrh[0]) & 3;
+ if (lnh == IPS_LRH_BTH)
+ ohdr = &hdr->u.oth;
+ else if (lnh == IPS_LRH_GRH)
+ ohdr = &hdr->u.l.oth;
+ else {
+ dev->rcv_errors++;
+ return;
+ }
+
+ opcode = be32_to_cpu(ohdr->bth[0]) >> 24;
+ dev->opstats[opcode].n_bytes += tlen;
+ dev->opstats[opcode].n_packets++;
+
+ /* Get the destination QP number. */
+ qp_num = be32_to_cpu(ohdr->bth[1]) & IPS_QPN_MASK;
+ if (qp_num == IPS_MULTICAST_QPN) {
+ struct ipath_mcast *mcast;
+ struct ipath_mcast_qp *p;
+
+ mcast = ipath_mcast_find(&hdr->u.l.grh.dgid);
+ if (mcast == NULL) {
+ dev->n_pkt_drops++;
+ return;
+ }
+ dev->n_multicast_rcv++;
+ list_for_each_entry_rcu(p, &mcast->qp_list, list)
+ ipath_qp_rcv(dev, hdr, lnh == IPS_LRH_GRH, data,
+ tlen, p->qp);
+ /*
+ * Notify ipath_multicast_detach() if it is waiting for us
+ * to finish.
+ */
+ if (atomic_dec_return(&mcast->refcount) <= 1)
+ wake_up(&mcast->wait);
+ } else {
+ qp = ipath_lookup_qpn(&dev->qp_table, qp_num);
+ if (qp) {
+ dev->n_unicast_rcv++;
+ ipath_qp_rcv(dev, hdr, lnh == IPS_LRH_GRH, data,
+ tlen, qp);
+ /*
+ * Notify ipath_destroy_qp() if it is waiting
+ * for us to finish.
+ */
+ if (atomic_dec_and_test(&qp->refcount))
+ wake_up(&qp->wait);
+ } else
+ dev->n_pkt_drops++;
+ }
+}
+
+/**
+ * ipath_ib_timer - verbs timer
+ * @t: the device number
+ *
+ * This is called from ipath_do_rcv_timer() at interrupt level to check for
+ * QPs which need retransmits and to collect performance numbers.
+ */
+static void ipath_ib_timer(int t)
+{
+ struct ipath_ibdev *dev = ipath_devices[t];
+ struct ipath_qp *resend = NULL;
+ struct ipath_qp *rnr = NULL;
+ struct list_head *last;
+ struct ipath_qp *qp;
+ unsigned long flags;
+
+ if (dev == NULL)
+ return;
+
+ spin_lock_irqsave(&dev->pending_lock, flags);
+ /* Start filling the next pending queue. */
+ if (++dev->pending_index >= ARRAY_SIZE(dev->pending))
+ dev->pending_index = 0;
+ /* Save any requests still in the new queue, they have timed out. */
+ last = &dev->pending[dev->pending_index];
+ while (!list_empty(last)) {
+ qp = list_entry(last->next, struct ipath_qp, timerwait);
+ if (last->next == LIST_POISON1 ||
+ last->next != &qp->timerwait ||
+ qp->timerwait.prev != last) {
+ INIT_LIST_HEAD(last);
+ } else {
+ list_del(&qp->timerwait);
+ qp->timerwait.prev = (struct list_head *) resend;
+ resend = qp;
+ atomic_inc(&qp->refcount);
+ }
+ }
+ last = &dev->rnrwait;
+ if (!list_empty(last)) {
+ qp = list_entry(last->next, struct ipath_qp, timerwait);
+ if (--qp->s_rnr_timeout == 0) {
+ do {
+ if (last->next == LIST_POISON1 ||
+ last->next != &qp->timerwait ||
+ qp->timerwait.prev != last) {
+ INIT_LIST_HEAD(last);
+ break;
+ }
+ list_del(&qp->timerwait);
+ qp->timerwait.prev =
+ (struct list_head *) rnr;
+ rnr = qp;
+ if (list_empty(last))
+ break;
+ qp = list_entry(last->next, struct ipath_qp,
+ timerwait);
+ } while (qp->s_rnr_timeout == 0);
+ }
+ }
+ /*
+ * We should only be in the started state if pma_sample_start != 0
+ */
+ if (dev->pma_sample_status == IB_PMA_SAMPLE_STATUS_STARTED &&
+ --dev->pma_sample_start == 0) {
+ dev->pma_sample_status = IB_PMA_SAMPLE_STATUS_RUNNING;
+ ipath_layer_snapshot_counters(dev->dd, &dev->ipath_sword,
+ &dev->ipath_rword,
+ &dev->ipath_spkts,
+ &dev->ipath_rpkts,
+ &dev->ipath_xmit_wait);
+ }
+ if (dev->pma_sample_status == IB_PMA_SAMPLE_STATUS_RUNNING) {
+ if (dev->pma_sample_interval == 0) {
+ u64 ta, tb, tc, td, te;
+
+ dev->pma_sample_status = IB_PMA_SAMPLE_STATUS_DONE;
+ ipath_layer_snapshot_counters(dev->dd, &ta, &tb,
+ &tc, &td, &te);
+
+ dev->ipath_sword = ta - dev->ipath_sword;
+ dev->ipath_rword = tb - dev->ipath_rword;
+ dev->ipath_spkts = tc - dev->ipath_spkts;
+ dev->ipath_rpkts = td - dev->ipath_rpkts;
+ dev->ipath_xmit_wait = te - dev->ipath_xmit_wait;
+ }
+ else
+ dev->pma_sample_interval--;
+ }
+ spin_unlock_irqrestore(&dev->pending_lock, flags);
+
+ /* XXX What if timer fires again while this is running? */
+ for (qp = resend; qp != NULL;
+ qp = (struct ipath_qp *) qp->timerwait.prev) {
+ struct ib_wc wc;
+
+ spin_lock_irqsave(&qp->s_lock, flags);
+ if (qp->s_last != qp->s_tail && qp->state == IB_QPS_RTS) {
+ dev->n_timeouts++;
+ ipath_restart_rc(qp, qp->s_last_psn + 1, &wc);
+ }
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+
+ /* Notify ipath_destroy_qp() if it is waiting. */
+ if (atomic_dec_and_test(&qp->refcount))
+ wake_up(&qp->wait);
+ }
+ for (qp = rnr; qp != NULL;
+ qp = (struct ipath_qp *) qp->timerwait.prev)
+ tasklet_hi_schedule(&qp->s_task);
+}
+
+/**
+ * ipath_ib_piobufavail - callback when a PIO buffer is available
+ * @t: the device number
+ *
+ * This is called from ipath_intr() at interrupt level when a PIO buffer is
+ * available after ipath_verbs_send() returned an error that no buffers were
+ * available. Return 0 if we consumed all the PIO buffers and we still have
+ * QPs waiting for buffers (for now, just do a tasklet_hi_schedule and
+ * return one).
+ */
+static int ipath_ib_piobufavail(int t)
+{
+ struct ipath_ibdev *dev = ipath_devices[t];
+ struct ipath_qp *qp;
+ unsigned long flags;
+
+ if (dev == NULL)
+ return 1;
+
+ spin_lock_irqsave(&dev->pending_lock, flags);
+ while (!list_empty(&dev->piowait)) {
+ qp = list_entry(dev->piowait.next, struct ipath_qp,
+ piowait);
+ list_del(&qp->piowait);
+ tasklet_hi_schedule(&qp->s_task);
+ }
+ spin_unlock_irqrestore(&dev->pending_lock, flags);
+
+ return 1;
+}
+
+static int ipath_query_device(struct ib_device *ibdev,
+ struct ib_device_attr *props)
+{
+ struct ipath_ibdev *dev = to_idev(ibdev);
+ u32 vendor, boardrev, majrev, minrev;
+
+ memset(props, 0, sizeof(*props));
+
+ props->device_cap_flags = IB_DEVICE_BAD_PKEY_CNTR |
+ IB_DEVICE_BAD_QKEY_CNTR | IB_DEVICE_SHUTDOWN_PORT |
+ IB_DEVICE_SYS_IMAGE_GUID;
+ ipath_layer_query_device(dev->dd, &vendor, &boardrev,
+ &majrev, &minrev);
+ props->vendor_id = vendor;
+ props->vendor_part_id = boardrev;
+ props->hw_ver = boardrev << 16 | majrev << 8 | minrev;
+
+ props->sys_image_guid = dev->sys_image_guid;
+
+ props->max_mr_size = ~0ull;
+ props->max_qp = 0xffff;
+ props->max_qp_wr = 0xffff;
+ props->max_sge = 255;
+ props->max_cq = 0xffff;
+ props->max_cqe = 0xffff;
+ props->max_mr = 0xffff;
+ props->max_pd = 0xffff;
+ props->max_qp_rd_atom = 1;
+ props->max_qp_init_rd_atom = 1;
+ /* props->max_res_rd_atom */
+ props->max_srq = 0xffff;
+ props->max_srq_wr = 0xffff;
+ props->max_srq_sge = 255;
+ /* props->local_ca_ack_delay */
+ props->atomic_cap = IB_ATOMIC_HCA;
+ props->max_pkeys = ipath_layer_get_npkeys(dev->dd);
+ props->max_mcast_grp = 0xffff;
+ props->max_mcast_qp_attach = 0xffff;
+ props->max_total_mcast_qp_attach = props->max_mcast_qp_attach *
+ props->max_mcast_grp;
+
+ return 0;
+}
+
+const u8 ipath_cvt_physportstate[16] = {
+ [INFINIPATH_IBCS_LT_STATE_DISABLED] = 3,
+ [INFINIPATH_IBCS_LT_STATE_LINKUP] = 5,
+ [INFINIPATH_IBCS_LT_STATE_POLLACTIVE] = 2,
+ [INFINIPATH_IBCS_LT_STATE_POLLQUIET] = 2,
+ [INFINIPATH_IBCS_LT_STATE_SLEEPDELAY] = 1,
+ [INFINIPATH_IBCS_LT_STATE_SLEEPQUIET] = 1,
+ [INFINIPATH_IBCS_LT_STATE_CFGDEBOUNCE] = 4,
+ [INFINIPATH_IBCS_LT_STATE_CFGRCVFCFG] = 4,
+ [INFINIPATH_IBCS_LT_STATE_CFGWAITRMT] = 4,
+ [INFINIPATH_IBCS_LT_STATE_CFGIDLE] = 4,
+ [INFINIPATH_IBCS_LT_STATE_RECOVERRETRAIN] = 6,
+ [INFINIPATH_IBCS_LT_STATE_RECOVERWAITRMT] = 6,
+ [INFINIPATH_IBCS_LT_STATE_RECOVERIDLE] = 6,
+};
+
+static int ipath_query_port(struct ib_device *ibdev,
+ u8 port, struct ib_port_attr *props)
+{
+ struct ipath_ibdev *dev = to_idev(ibdev);
+ enum ib_mtu mtu;
+ u16 lid = ipath_layer_get_lid(dev->dd);
+ u64 ibcstat;
+
+ memset(props, 0, sizeof(*props));
+ props->lid = lid ? lid : IB_LID_PERMISSIVE;
+ props->lmc = dev->mkeyprot_resv_lmc & 7;
+ props->sm_lid = dev->sm_lid;
+ props->sm_sl = dev->sm_sl;
+ ibcstat = ipath_layer_get_lastibcstat(dev->dd);
+ props->state = ((ibcstat >> 4) & 0x3) + 1;
+ /* See phys_state_show() */
+ props->phys_state = ipath_cvt_physportstate[
+ ipath_layer_get_lastibcstat(dev->dd) & 0xf];
+ props->port_cap_flags = dev->port_cap_flags;
+ props->gid_tbl_len = 1;
+ props->max_msg_sz = 4096;
+ props->pkey_tbl_len = ipath_layer_get_npkeys(dev->dd);
+ props->bad_pkey_cntr = ipath_layer_get_cr_errpkey(dev->dd) -
+ dev->n_pkey_violations;
+ props->qkey_viol_cntr = dev->qkey_violations;
+ props->active_width = IB_WIDTH_4X;
+ /* See rate_show() */
+ props->active_speed = 1; /* Regular 10Mbs speed. */
+ props->max_vl_num = 1; /* VLCap = VL0 */
+ props->init_type_reply = 0;
+
+ props->max_mtu = IB_MTU_4096;
+ switch (ipath_layer_get_ibmtu(dev->dd)) {
+ case 4096:
+ mtu = IB_MTU_4096;
+ break;
+ case 2048:
+ mtu = IB_MTU_2048;
+ break;
+ case 1024:
+ mtu = IB_MTU_1024;
+ break;
+ case 512:
+ mtu = IB_MTU_512;
+ break;
+ case 256:
+ mtu = IB_MTU_256;
+ break;
+ default:
+ mtu = IB_MTU_2048;
+ }
+ props->active_mtu = mtu;
+ props->subnet_timeout = dev->subnet_timeout;
+
+ return 0;
+}
+
+static int ipath_modify_device(struct ib_device *device,
+ int device_modify_mask,
+ struct ib_device_modify *device_modify)
+{
+ if (device_modify_mask & ~(IB_DEVICE_MODIFY_SYS_IMAGE_GUID |
+ IB_DEVICE_MODIFY_NODE_DESC))
+ return -EOPNOTSUPP;
+
+ if (device_modify_mask & IB_DEVICE_MODIFY_NODE_DESC)
+ memcpy(device->node_desc, device_modify->node_desc, 64);
+
+ if (device_modify_mask & IB_DEVICE_MODIFY_SYS_IMAGE_GUID)
+ to_idev(device)->sys_image_guid =
+ device_modify->sys_image_guid;
+
+ return 0;
+}
+
+static int ipath_modify_port(struct ib_device *ibdev,
+ u8 port, int port_modify_mask,
+ struct ib_port_modify *props)
+{
+ struct ipath_ibdev *dev = to_idev(ibdev);
+
+ atomic_set_mask(props->set_port_cap_mask, &dev->port_cap_flags);
+ atomic_clear_mask(props->clr_port_cap_mask, &dev->port_cap_flags);
+ if (port_modify_mask & IB_PORT_SHUTDOWN)
+ ipath_layer_set_linkstate(dev->dd, IPATH_IB_LINKDOWN);
+ if (port_modify_mask & IB_PORT_RESET_QKEY_CNTR)
+ dev->qkey_violations = 0;
+ return 0;
+}
+
+static int ipath_query_gid(struct ib_device *ibdev, u8 port,
+ int index, union ib_gid *gid)
+{
+ struct ipath_ibdev *dev = to_idev(ibdev);
+
+ if (index >= 1)
+ return -EINVAL;
+ gid->global.subnet_prefix = dev->gid_prefix;
+ gid->global.interface_id = ipath_layer_get_guid(dev->dd);
+
+ return 0;
+}
+
+static struct ib_pd *ipath_alloc_pd(struct ib_device *ibdev,
+ struct ib_ucontext *context,
+ struct ib_udata *udata)
+{
+ struct ipath_pd *pd;
+
+ pd = kmalloc(sizeof *pd, GFP_KERNEL);
+ if (!pd)
+ return ERR_PTR(-ENOMEM);
+
+ /* ib_alloc_pd() will initialize pd->ibpd. */
+ pd->user = udata != NULL;
+
+ return &pd->ibpd;
+}
+
+static int ipath_dealloc_pd(struct ib_pd *ibpd)
+{
+ struct ipath_pd *pd = to_ipd(ibpd);
+
+ kfree(pd);
+
+ return 0;
+}
+
+/**
+ * ipath_create_ah - create an address handle
+ * @pd: the protection domain
+ * @ah_attr: the attributes of the AH
+ *
+ * This may be called from interrupt context.
+ */
+static struct ib_ah *ipath_create_ah(struct ib_pd *pd,
+ struct ib_ah_attr *ah_attr)
+{
+ struct ipath_ah *ah;
+
+ /* A multicast address requires a GRH (see ch. 8.4.1). */
+ if (ah_attr->dlid >= IPS_MULTICAST_LID_BASE &&
+ ah_attr->dlid != IPS_PERMISSIVE_LID &&
+ !(ah_attr->ah_flags & IB_AH_GRH))
+ return ERR_PTR(-EINVAL);
+
+ ah = kmalloc(sizeof *ah, GFP_ATOMIC);
+ if (!ah)
+ return ERR_PTR(-ENOMEM);
+
+ /* ib_create_ah() will initialize ah->ibah. */
+ ah->attr = *ah_attr;
+
+ return &ah->ibah;
+}
+
+/**
+ * ipath_destroy_ah - destroy an address handle
+ * @ibah: the AH to destroy
+ *
+ * This may be called from interrupt context.
+ */
+static int ipath_destroy_ah(struct ib_ah *ibah)
+{
+ struct ipath_ah *ah = to_iah(ibah);
+
+ kfree(ah);
+
+ return 0;
+}
+
+static int ipath_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr)
+{
+ struct ipath_ah *ah = to_iah(ibah);
+
+ *ah_attr = ah->attr;
+
+ return 0;
+}
+
+static int ipath_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
+ u16 *pkey)
+{
+ struct ipath_ibdev *dev = to_idev(ibdev);
+
+ if (index >= ipath_layer_get_npkeys(dev->dd))
+ return -EINVAL;
+ *pkey = ipath_layer_get_pkey(dev->dd, index);
+ return 0;
+}
+
+
+/**
+ * ipath_alloc_ucontext - allocate a ucontest
+ * @ibdev: the infiniband device
+ * @udata: not used by the InfiniPath driver
+ */
+
+static struct ib_ucontext *ipath_alloc_ucontext(struct ib_device *ibdev,
+ struct ib_udata *udata)
+{
+ struct ipath_ucontext *context;
+
+ context = kmalloc(sizeof *context, GFP_KERNEL);
+ if (!context)
+ return ERR_PTR(-ENOMEM);
+
+ return &context->ibucontext;
+}
+
+static int ipath_dealloc_ucontext(struct ib_ucontext *context)
+{
+ kfree(to_iucontext(context));
+ return 0;
+}
+
+static int ipath_verbs_register_sysfs(struct ib_device *dev);
+
+/**
+ * ipath_register_ib_device - register our device with the infiniband core
+ * @t: the device number to register
+ * @dd: the device data structure
+ */
+static int ipath_register_ib_device(int t, struct ipath_devdata *dd)
+{
+ struct ipath_ibdev *idev;
+ struct ib_device *dev;
+ int ret;
+
+ idev = (struct ipath_ibdev *)ib_alloc_device(sizeof *idev);
+ if (idev == NULL)
+ return -ENOMEM;
+
+ dev = &idev->ibdev;
+
+ /* Only need to initialize non-zero fields. */
+ spin_lock_init(&idev->qp_table.lock);
+ spin_lock_init(&idev->lk_table.lock);
+ idev->sm_lid = IB_LID_PERMISSIVE;
+ /* Set the prefix to the default value (see ch. 4.1.1) */
+ idev->gid_prefix = __constant_cpu_to_be64(0xfe80000000000000ULL);
+
+ ret = ipath_init_qp_table(idev, ib_ipath_qp_table_size);
+ if (ret)
+ goto err_qp;
+
+ /*
+ * The top ib_ipath_lkey_table_size bits are used to index the
+ * table. The lower 8 bits can be owned by the user (copied from
+ * the LKEY). The remaining bits act as a generation number or tag.
+ */
+ idev->lk_table.max = 1 << ib_ipath_lkey_table_size;
+ idev->lk_table.table = kzalloc(idev->lk_table.max *
+ sizeof(*idev->lk_table.table),
+ GFP_KERNEL);
+ if (idev->lk_table.table == NULL) {
+ ret = -ENOMEM;
+ goto err_lk;
+ }
+ spin_lock_init(&idev->pending_lock);
+ INIT_LIST_HEAD(&idev->pending[0]);
+ INIT_LIST_HEAD(&idev->pending[1]);
+ INIT_LIST_HEAD(&idev->pending[2]);
+ INIT_LIST_HEAD(&idev->piowait);
+ INIT_LIST_HEAD(&idev->rnrwait);
+ idev->pending_index = 0;
+ idev->port_cap_flags =
+ IB_PORT_SYS_IMAGE_GUID_SUP | IB_PORT_CLIENT_REG_SUP;
+ idev->pma_counter_select[0] = IB_PMA_PORT_XMIT_DATA;
+ idev->pma_counter_select[1] = IB_PMA_PORT_RCV_DATA;
+ idev->pma_counter_select[2] = IB_PMA_PORT_XMIT_PKTS;
+ idev->pma_counter_select[3] = IB_PMA_PORT_RCV_PKTS;
+ idev->pma_counter_select[5] = IB_PMA_PORT_XMIT_WAIT;
+ idev->link_width_enabled = 3; /* 1x or 4x */
+
+ /*
+ * The system image GUID is supposed to be the same for all
+ * IB HCAs in a single system.
+ * Note that this code assumes device zero is found first.
+ */
+ idev->sys_image_guid = t
+ ? ipath_devices[t]->sys_image_guid
+ : ipath_layer_get_guid(dd);
+ idev->ib_unit = t;
+ idev->dd = dd;
+
+ strlcpy(dev->name, "ipath%d", IB_DEVICE_NAME_MAX);
+ dev->node_guid = ipath_layer_get_guid(dd);
+ dev->uverbs_abi_ver = IPATH_UVERBS_ABI_VERSION;
+ dev->uverbs_cmd_mask =
+ (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
+ (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
+ (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
+ (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
+ (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
+ (1ull << IB_USER_VERBS_CMD_CREATE_AH) |
+ (1ull << IB_USER_VERBS_CMD_DESTROY_AH) |
+ (1ull << IB_USER_VERBS_CMD_QUERY_AH) |
+ (1ull << IB_USER_VERBS_CMD_REG_MR) |
+ (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
+ (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
+ (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
+ (1ull << IB_USER_VERBS_CMD_RESIZE_CQ) |
+ (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
+ (1ull << IB_USER_VERBS_CMD_POLL_CQ) |
+ (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
+ (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
+ (1ull << IB_USER_VERBS_CMD_QUERY_QP) |
+ (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
+ (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
+ (1ull << IB_USER_VERBS_CMD_POST_SEND) |
+ (1ull << IB_USER_VERBS_CMD_POST_RECV) |
+ (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) |
+ (1ull << IB_USER_VERBS_CMD_DETACH_MCAST) |
+ (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
+ (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
+ (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
+ (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ) |
+ (1ull << IB_USER_VERBS_CMD_POST_SRQ_RECV);
+ dev->node_type = RDMA_NODE_IB_CA;
+ dev->phys_port_cnt = 1;
+ dev->dma_device = ipath_layer_get_device(dd);
+ dev->class_dev.dev = dev->dma_device;
+ dev->query_device = ipath_query_device;
+ dev->modify_device = ipath_modify_device;
+ dev->query_port = ipath_query_port;
+ dev->modify_port = ipath_modify_port;
+ dev->query_pkey = ipath_query_pkey;
+ dev->query_gid = ipath_query_gid;
+ dev->alloc_ucontext = ipath_alloc_ucontext;
+ dev->dealloc_ucontext = ipath_dealloc_ucontext;
+ dev->alloc_pd = ipath_alloc_pd;
+ dev->dealloc_pd = ipath_dealloc_pd;
+ dev->create_ah = ipath_create_ah;
+ dev->destroy_ah = ipath_destroy_ah;
+ dev->query_ah = ipath_query_ah;
+ dev->create_srq = ipath_create_srq;
+ dev->modify_srq = ipath_modify_srq;
+ dev->query_srq = ipath_query_srq;
+ dev->destroy_srq = ipath_destroy_srq;
+ dev->create_qp = ipath_create_qp;
+ dev->modify_qp = ipath_modify_qp;
+ dev->query_qp = ipath_query_qp;
+ dev->destroy_qp = ipath_destroy_qp;
+ dev->post_send = ipath_post_send;
+ dev->post_recv = ipath_post_receive;
+ dev->post_srq_recv = ipath_post_srq_receive;
+ dev->create_cq = ipath_create_cq;
+ dev->destroy_cq = ipath_destroy_cq;
+ dev->resize_cq = ipath_resize_cq;
+ dev->poll_cq = ipath_poll_cq;
+ dev->req_notify_cq = ipath_req_notify_cq;
+ dev->get_dma_mr = ipath_get_dma_mr;
+ dev->reg_phys_mr = ipath_reg_phys_mr;
+ dev->reg_user_mr = ipath_reg_user_mr;
+ dev->dereg_mr = ipath_dereg_mr;
+ dev->alloc_fmr = ipath_alloc_fmr;
+ dev->map_phys_fmr = ipath_map_phys_fmr;
+ dev->unmap_fmr = ipath_unmap_fmr;
+ dev->dealloc_fmr = ipath_dealloc_fmr;
+ dev->attach_mcast = ipath_multicast_attach;
+ dev->detach_mcast = ipath_multicast_detach;
+ dev->process_mad = ipath_process_mad;
+
+ snprintf(dev->node_desc, sizeof(dev->node_desc),
+ IPATH_IDSTR " %s kernel_SMA", system_utsname.nodename);
+
+ ret = ib_register_device(dev);
+ if (ret)
+ goto err_reg;
+
+ /*
+ * We don't need to register a MAD agent, we just need to create
+ * a linker dependency on ib_mad so the module is loaded before
+ * this module is initialized. The call to ib_register_device()
+ * above will then cause ib_mad to create QP 0 & 1.
+ */
+ (void) ib_register_mad_agent(dev, 1, (enum ib_qp_type) 2,
+ NULL, 0, NULL, NULL, NULL);
+
+ if (ipath_verbs_register_sysfs(dev))
+ goto err_class;
+
+ ipath_layer_enable_timer(dd);
+
+ ipath_devices[t] = idev;
+ return 0;
+
+err_class:
+ ib_unregister_device(dev);
+err_reg:
+ kfree(idev->lk_table.table);
+err_lk:
+ kfree(idev->qp_table.table);
+err_qp:
+ ib_dealloc_device(dev);
+ return ret;
+}
+
+static void ipath_unregister_ib_device(struct ipath_ibdev *dev)
+{
+ struct ib_device *ibdev = &dev->ibdev;
+
+ ipath_layer_disable_timer(dev->dd);
+
+ ib_unregister_device(ibdev);
+
+ if (!list_empty(&dev->pending[0]) ||
+ !list_empty(&dev->pending[1]) ||
+ !list_empty(&dev->pending[2]))
+ _VERBS_ERROR("ipath%d pending list not empty!\n",
+ dev->ib_unit);
+ if (!list_empty(&dev->piowait))
+ _VERBS_ERROR("ipath%d piowait list not empty!\n",
+ dev->ib_unit);
+ if (!list_empty(&dev->rnrwait))
+ _VERBS_ERROR("ipath%d rnrwait list not empty!\n",
+ dev->ib_unit);
+ if (!ipath_mcast_tree_empty())
+ _VERBS_ERROR("ipath%d multicast table memory leak!\n",
+ dev->ib_unit);
+ /*
+ * Note that ipath_unregister_ib_device() can be called before all
+ * the QPs are destroyed!
+ */
+ ipath_free_all_qps(&dev->qp_table);
+ kfree(dev->qp_table.table);
+ kfree(dev->lk_table.table);
+ ib_dealloc_device(ibdev);
+}
+
+int __init ipath_verbs_init(void)
+{
+ int i;
+
+ number_of_devices = ipath_layer_get_num_of_dev();
+ i = number_of_devices * sizeof(struct ipath_ibdev *);
+ ipath_devices = kmalloc(i, GFP_ATOMIC);
+ if (ipath_devices == NULL)
+ return -ENOMEM;
+
+ for (i = 0; i < number_of_devices; i++) {
+ struct ipath_devdata *dd;
+ int ret = ipath_verbs_register(i, ipath_ib_piobufavail,
+ ipath_ib_rcv, ipath_ib_timer,
+ &dd);
+
+ if (ret < 0) {
+ _VERBS_ERROR("ib_ipath%d cannot register "
+ "verbs (%d)!\n", i, -ret);
+ ipath_devices[i] = NULL;
+ } else {
+ ret = ipath_register_ib_device(i, dd);
+ if (ret) {
+ _VERBS_ERROR("ib_ipath%d cannot register "
+ "ib device (%d)!\n", i, ret);
+ ipath_verbs_unregister(dd);
+ ipath_devices[i] = NULL;
+ }
+ }
+ }
+
+ return 0;
+}
+
+void __exit ipath_verbs_cleanup(void)
+{
+ int i;
+
+ for (i = 0; i < number_of_devices; i++)
+ if (ipath_devices[i]) {
+ struct ipath_devdata *dd = ipath_devices[i]->dd;
+ ipath_unregister_ib_device(ipath_devices[i]);
+ ipath_verbs_unregister(dd);
+ }
+
+ kfree(ipath_devices);
+}
+
+static ssize_t show_rev(struct class_device *cdev, char *buf)
+{
+ struct ipath_ibdev *dev =
+ container_of(cdev, struct ipath_ibdev, ibdev.class_dev);
+ int vendor, boardrev, majrev, minrev;
+
+ ipath_layer_query_device(dev->dd, &vendor, &boardrev,
+ &majrev, &minrev);
+ return sprintf(buf, "%d.%d\n", majrev, minrev);
+}
+
+static ssize_t show_hca(struct class_device *cdev, char *buf)
+{
+ struct ipath_ibdev *dev =
+ container_of(cdev, struct ipath_ibdev, ibdev.class_dev);
+ int ret;
+
+ ret = ipath_layer_get_boardname(dev->dd, buf, 128);
+ if (ret < 0)
+ return ret;
+ strcat(buf, "\n");
+ return strlen(buf);
+}
+
+static ssize_t show_stats(struct class_device *cdev, char *buf)
+{
+ struct ipath_ibdev *dev =
+ container_of(cdev, struct ipath_ibdev, ibdev.class_dev);
+ int i;
+ int len;
+
+ len = sprintf(buf,
+ "RC resends %d\n"
+ "RC QACKs %d\n"
+ "RC ACKs %d\n"
+ "RC SEQ NAKs %d\n"
+ "RC RDMA seq %d\n"
+ "RC RNR NAKs %d\n"
+ "RC OTH NAKs %d\n"
+ "RC timeouts %d\n"
+ "RC RDMA dup %d\n"
+ "piobuf wait %d\n"
+ "no piobuf %d\n"
+ "PKT drops %d\n"
+ "WQE errs %d\n",
+ dev->n_rc_resends, dev->n_rc_qacks, dev->n_rc_acks,
+ dev->n_seq_naks, dev->n_rdma_seq, dev->n_rnr_naks,
+ dev->n_other_naks, dev->n_timeouts,
+ dev->n_rdma_dup_busy, dev->n_piowait,
+ dev->n_no_piobuf, dev->n_pkt_drops, dev->n_wqe_errs);
+ for (i = 0; i < ARRAY_SIZE(dev->opstats); i++) {
+ if (!dev->opstats[i].n_packets && !dev->opstats[i].n_bytes)
+ continue;
+ len += sprintf(buf + len, "%02x %llu/%llu\n",
+ i, dev->opstats[i].n_packets,
+ dev->opstats[i].n_bytes);
+ }
+ return len;
+}
+
+static CLASS_DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
+static CLASS_DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
+static CLASS_DEVICE_ATTR(board_id, S_IRUGO, show_hca, NULL);
+static CLASS_DEVICE_ATTR(stats, S_IRUGO, show_stats, NULL);
+
+static struct class_device_attribute *ipath_class_attributes[] = {
+ &class_device_attr_hw_rev,
+ &class_device_attr_hca_type,
+ &class_device_attr_board_id,
+ &class_device_attr_stats
+};
+
+static int ipath_verbs_register_sysfs(struct ib_device *dev)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(ipath_class_attributes); ++i)
+ if (class_device_create_file(&dev->class_dev,
+ ipath_class_attributes[i]))
+ return 1;
+
+ return 0;
+}
+
+module_init(ipath_verbs_init);
+module_exit(ipath_verbs_cleanup);
diff -r f57c24166c57 -r 1c88f73c2ac0 drivers/infiniband/hw/ipath/ipath_verbs_mcast.c
--- /dev/null Thu Jan 1 00:00:00 1970 +0000
+++ b/drivers/infiniband/hw/ipath/ipath_verbs_mcast.c Thu Mar 9 16:16:58 2006 -0800
@@ -0,0 +1,311 @@
+/*
+ * Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/list.h>
+#include <linux/rcupdate.h>
+
+#include "ipath_verbs.h"
+
+/*
+ * Global table of GID to attached QPs.
+ * The table is global to all ipath devices since a send from one QP/device
+ * needs to be locally routed to any locally attached QPs on the same
+ * or different device.
+ */
+static struct rb_root mcast_tree;
+static DEFINE_SPINLOCK(mcast_lock);
+
+/**
+ * ipath_mcast_qp_alloc - alloc a struct to link a QP to the mcast GID struct
+ * @qp: the QP to link
+ */
+static struct ipath_mcast_qp *ipath_mcast_qp_alloc(struct ipath_qp *qp)
+{
+ struct ipath_mcast_qp *mqp;
+
+ mqp = kmalloc(sizeof *mqp, GFP_KERNEL);
+ if (!mqp)
+ return NULL;
+
+ mqp->qp = qp;
+ atomic_inc(&qp->refcount);
+
+ return mqp;
+}
+
+static void ipath_mcast_qp_free(struct ipath_mcast_qp *mqp)
+{
+ struct ipath_qp *qp = mqp->qp;
+
+ /* Notify ipath_destroy_qp() if it is waiting. */
+ if (atomic_dec_and_test(&qp->refcount))
+ wake_up(&qp->wait);
+
+ kfree(mqp);
+}
+
+/**
+ * ipath_mcast_alloc - allocate the multicast GID structure
+ * @mgid: the multicast GID
+ *
+ * A list of QPs will be attached to this structure.
+ */
+static struct ipath_mcast *ipath_mcast_alloc(union ib_gid *mgid)
+{
+ struct ipath_mcast *mcast;
+
+ mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
+ if (!mcast)
+ return NULL;
+
+ mcast->mgid = *mgid;
+ INIT_LIST_HEAD(&mcast->qp_list);
+ init_waitqueue_head(&mcast->wait);
+ atomic_set(&mcast->refcount, 0);
+
+ return mcast;
+}
+
+static void ipath_mcast_free(struct ipath_mcast *mcast)
+{
+ struct ipath_mcast_qp *p, *tmp;
+
+ list_for_each_entry_safe(p, tmp, &mcast->qp_list, list)
+ ipath_mcast_qp_free(p);
+
+ kfree(mcast);
+}
+
+/**
+ * ipath_mcast_find - search the global table for the given multicast GID
+ * @mgid: the multicast GID to search for
+ *
+ * Returns NULL if not found.
+ *
+ * The caller is responsible for decrementing the reference count if found.
+ */
+struct ipath_mcast *ipath_mcast_find(union ib_gid *mgid)
+{
+ struct rb_node *n;
+ unsigned long flags;
+
+ spin_lock_irqsave(&mcast_lock, flags);
+ n = mcast_tree.rb_node;
+ while (n) {
+ struct ipath_mcast *mcast;
+ int ret;
+
+ mcast = rb_entry(n, struct ipath_mcast, rb_node);
+
+ ret = memcmp(mgid->raw, mcast->mgid.raw,
+ sizeof(union ib_gid));
+ if (ret < 0)
+ n = n->rb_left;
+ else if (ret > 0)
+ n = n->rb_right;
+ else {
+ atomic_inc(&mcast->refcount);
+ spin_unlock_irqrestore(&mcast_lock, flags);
+ return mcast;
+ }
+ }
+ spin_unlock_irqrestore(&mcast_lock, flags);
+
+ return NULL;
+}
+
+/**
+ * ipath_mcast_add - insert the mcast GID into the table and attach QP struct
+ * @mcast: the mcast GID table
+ * @mqp: the QP to attach
+ *
+ * Return zero if both were added. Return EEXIST if the GID was already in
+ * the table but the QP was added. Return ESRCH if the QP was already
+ * attached and neither structure was added.
+ */
+static int ipath_mcast_add(struct ipath_mcast *mcast,
+ struct ipath_mcast_qp *mqp)
+{
+ struct rb_node **n = &mcast_tree.rb_node;
+ struct rb_node *pn = NULL;
+ unsigned long flags;
+
+ spin_lock_irqsave(&mcast_lock, flags);
+
+ while (*n) {
+ struct ipath_mcast *tmcast;
+ struct ipath_mcast_qp *p;
+ int ret;
+
+ pn = *n;
+ tmcast = rb_entry(pn, struct ipath_mcast, rb_node);
+
+ ret = memcmp(mcast->mgid.raw, tmcast->mgid.raw,
+ sizeof(union ib_gid));
+ if (ret < 0) {
+ n = &pn->rb_left;
+ continue;
+ }
+ if (ret > 0) {
+ n = &pn->rb_right;
+ continue;
+ }
+
+ /* Search the QP list to see if this is already there. */
+ list_for_each_entry_rcu(p, &tmcast->qp_list, list) {
+ if (p->qp == mqp->qp) {
+ spin_unlock_irqrestore(&mcast_lock, flags);
+ return ESRCH;
+ }
+ }
+ list_add_tail_rcu(&mqp->list, &tmcast->qp_list);
+ spin_unlock_irqrestore(&mcast_lock, flags);
+ return EEXIST;
+ }
+
+ list_add_tail_rcu(&mqp->list, &mcast->qp_list);
+
+ atomic_inc(&mcast->refcount);
+ rb_link_node(&mcast->rb_node, pn, n);
+ rb_insert_color(&mcast->rb_node, &mcast_tree);
+
+ spin_unlock_irqrestore(&mcast_lock, flags);
+
+ return 0;
+}
+
+int ipath_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
+{
+ struct ipath_qp *qp = to_iqp(ibqp);
+ struct ipath_mcast *mcast;
+ struct ipath_mcast_qp *mqp;
+
+ /*
+ * Allocate data structures since its better to do this outside of
+ * spin locks and it will most likely be needed.
+ */
+ mcast = ipath_mcast_alloc(gid);
+ if (mcast == NULL)
+ return -ENOMEM;
+ mqp = ipath_mcast_qp_alloc(qp);
+ if (mqp == NULL) {
+ ipath_mcast_free(mcast);
+ return -ENOMEM;
+ }
+ switch (ipath_mcast_add(mcast, mqp)) {
+ case ESRCH:
+ /* Neither was used: can't attach the same QP twice. */
+ ipath_mcast_qp_free(mqp);
+ ipath_mcast_free(mcast);
+ return -EINVAL;
+ case EEXIST: /* The mcast wasn't used */
+ ipath_mcast_free(mcast);
+ break;
+ default:
+ break;
+ }
+ return 0;
+}
+
+int ipath_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
+{
+ struct ipath_qp *qp = to_iqp(ibqp);
+ struct ipath_mcast *mcast = NULL;
+ struct ipath_mcast_qp *p, *tmp;
+ struct rb_node *n;
+ unsigned long flags;
+ int last = 0;
+
+ spin_lock_irqsave(&mcast_lock, flags);
+
+ /* Find the GID in the mcast table. */
+ n = mcast_tree.rb_node;
+ while (1) {
+ int ret;
+
+ if (n == NULL) {
+ spin_unlock_irqrestore(&mcast_lock, flags);
+ return 0;
+ }
+
+ mcast = rb_entry(n, struct ipath_mcast, rb_node);
+ ret = memcmp(gid->raw, mcast->mgid.raw,
+ sizeof(union ib_gid));
+ if (ret < 0)
+ n = n->rb_left;
+ else if (ret > 0)
+ n = n->rb_right;
+ else
+ break;
+ }
+
+ /* Search the QP list. */
+ list_for_each_entry_safe(p, tmp, &mcast->qp_list, list) {
+ if (p->qp != qp)
+ continue;
+ /*
+ * We found it, so remove it, but don't poison the forward
+ * link until we are sure there are no list walkers.
+ */
+ list_del_rcu(&p->list);
+
+ /* If this was the last attached QP, remove the GID too. */
+ if (list_empty(&mcast->qp_list)) {
+ rb_erase(&mcast->rb_node, &mcast_tree);
+ last = 1;
+ }
+ break;
+ }
+
+ spin_unlock_irqrestore(&mcast_lock, flags);
+
+ if (p) {
+ /*
+ * Wait for any list walkers to finish before freeing the
+ * list element.
+ */
+ wait_event(mcast->wait, atomic_read(&mcast->refcount) <= 1);
+ ipath_mcast_qp_free(p);
+ }
+ if (last) {
+ atomic_dec(&mcast->refcount);
+ wait_event(mcast->wait, !atomic_read(&mcast->refcount));
+ ipath_mcast_free(mcast);
+ }
+
+ return 0;
+}
+
+int ipath_mcast_tree_empty(void)
+{
+ return mcast_tree.rb_node == NULL;
+}
^ permalink raw reply [flat|nested] 70+ messages in thread* [PATCH 18 of 20] ipath - kbuild infrastructure
2006-03-10 0:35 [PATCH 0 of 20] [RFC] ipath driver - another round for review Bryan O'Sullivan
` (16 preceding siblings ...)
2006-03-10 0:35 ` [PATCH 17 of 20] ipath - infiniband verbs support Bryan O'Sullivan
@ 2006-03-10 0:35 ` Bryan O'Sullivan
2006-03-13 18:10 ` Adrian Bunk
2006-03-10 0:35 ` [PATCH 19 of 20] ipath - integrate driver into infiniband " Bryan O'Sullivan
` (2 subsequent siblings)
20 siblings, 1 reply; 70+ messages in thread
From: Bryan O'Sullivan @ 2006-03-10 0:35 UTC (permalink / raw)
To: rolandd, gregkh, akpm, davem; +Cc: linux-kernel, openib-general
Signed-off-by: Bryan O'Sullivan <bos@pathscale.com>
diff -r 1c88f73c2ac0 -r 867a396dd518 drivers/infiniband/hw/ipath/Kconfig
--- /dev/null Thu Jan 1 00:00:00 1970 +0000
+++ b/drivers/infiniband/hw/ipath/Kconfig Thu Mar 9 16:17:00 2006 -0800
@@ -0,0 +1,18 @@
+config IPATH_CORE
+ tristate "PathScale InfiniPath Driver"
+ depends on 64BIT && (PCIEPORTBUS || X86_HT)
+ ---help---
+ This is a low-level driver for PathScale InfiniPath host channel
+ adapters (HCAs) based on the HT-400 and PE-800 chips, including
+ the InfiniPath HT-460, the small form factor InfiniPath HT-460,
+ the InfiniPath HT-470 and the Linux Networx LS/X.
+
+config INFINIBAND_IPATH
+ tristate "PathScale InfiniPath Verbs Driver"
+ depends on IPATH_CORE && INFINIBAND
+ ---help---
+ This is a driver that provides InfiniBand verbs support for
+ PathScale InfiniPath host channel adapters (HCAs). This
+ allows these devices to be used with both kernel upper level
+ protocols such as IP-over-InfiniBand as well as with userspace
+ applications (in conjunction with InfiniBand userspace access).
diff -r 1c88f73c2ac0 -r 867a396dd518 drivers/infiniband/hw/ipath/Makefile
--- /dev/null Thu Jan 1 00:00:00 1970 +0000
+++ b/drivers/infiniband/hw/ipath/Makefile Thu Mar 9 16:17:00 2006 -0800
@@ -0,0 +1,42 @@
+EXTRA_CFLAGS += -O3
+
+_ipath_idstr:="PathScale $(shell date +%F)"
+EXTRA_CFLAGS += -DIPATH_IDSTR='$(_ipath_idstr)' -DIPATH_KERN_TYPE=0
+
+obj-$(CONFIG_IPATH_CORE) += ipath_core.o
+obj-$(CONFIG_INFINIBAND_IPATH) += ib_ipath.o
+obj-$(CONFIG_IPATH_ETHER) += ipath_ether.o
+
+ipath_core-y := \
+ ipath_copy.o \
+ ipath_diag.o \
+ ipath_driver.o \
+ ipath_eeprom.o \
+ ipath_file_ops.o \
+ ipath_ht400.o \
+ ipath_init_chip.o \
+ ipath_intr.o \
+ ipath_layer.o \
+ ipath_pe800.o \
+ ipath_sma.o \
+ ipath_stats.o \
+ ipath_sysfs.o \
+ ipath_user_pages.o
+
+ipath_core-$(CONFIG_X86_64) += ipath_wc_x86_64.o
+
+ib_ipath-y := \
+ ipath_cq.o \
+ ipath_keys.o \
+ ipath_mad.o \
+ ipath_mr.o \
+ ipath_qp.o \
+ ipath_rc.o \
+ ipath_ruc.o \
+ ipath_srq.o \
+ ipath_uc.o \
+ ipath_ud.o \
+ ipath_verbs.o \
+ ipath_verbs_mcast.o
+
+ipath_ether-y := ipath_eth.o
^ permalink raw reply [flat|nested] 70+ messages in thread* Re: [PATCH 18 of 20] ipath - kbuild infrastructure
2006-03-10 0:35 ` [PATCH 18 of 20] ipath - kbuild infrastructure Bryan O'Sullivan
@ 2006-03-13 18:10 ` Adrian Bunk
2006-03-13 18:38 ` Robert Walsh
2006-03-13 19:24 ` Bryan O'Sullivan
0 siblings, 2 replies; 70+ messages in thread
From: Adrian Bunk @ 2006-03-13 18:10 UTC (permalink / raw)
To: Bryan O'Sullivan, rjwalsh
Cc: rolandd, gregkh, akpm, davem, linux-kernel, openib-general
On Thu, Mar 09, 2006 at 04:35:48PM -0800, Bryan O'Sullivan wrote:
>...
> --- /dev/null Thu Jan 1 00:00:00 1970 +0000
> +++ b/drivers/infiniband/hw/ipath/Makefile Thu Mar 9 16:17:00 2006 -0800
> @@ -0,0 +1,42 @@
> +EXTRA_CFLAGS += -O3
I'm still a bit surprised, since in the rest of the kernel we are even
going from -O2 to -Os for getting better performance.
Robert said he wanted to post some numbers showing that -O3 is
measurably better for you [1], but I haven't seen them.
> +_ipath_idstr:="PathScale $(shell date +%F)"
> +EXTRA_CFLAGS += -DIPATH_IDSTR='$(_ipath_idstr)' -DIPATH_KERN_TYPE=0
>...
UTS_VERSION is already available and printed at the top of dmesg.
I don't see the point in printing it a second time.
cu
Adrian
[1] http://lkml.org/lkml/2005/12/17/115
--
"Is there not promise of rain?" Ling Tan asked suddenly out
of the darkness. There had been need of rain for many days.
"Only a promise," Lao Er said.
Pearl S. Buck - Dragon Seed
^ permalink raw reply [flat|nested] 70+ messages in thread* Re: [PATCH 18 of 20] ipath - kbuild infrastructure
2006-03-13 18:10 ` Adrian Bunk
@ 2006-03-13 18:38 ` Robert Walsh
2006-03-13 19:24 ` Bryan O'Sullivan
1 sibling, 0 replies; 70+ messages in thread
From: Robert Walsh @ 2006-03-13 18:38 UTC (permalink / raw)
To: Adrian Bunk
Cc: Bryan O'Sullivan, rolandd, gregkh, akpm, davem, linux-kernel,
openib-general
> I'm still a bit surprised, since in the rest of the kernel we are even
> going from -O2 to -Os for getting better performance.
>
> Robert said he wanted to post some numbers showing that -O3 is
> measurably better for you [1], but I haven't seen them.
As you might have guessed, I kind of forgot about this (I was swamped
with unrelated stuff.) I'll try get someone else here at PathScale to
get these numbers.
Regards,
Robert.
--
Robert Walsh Email: rjwalsh@pathscale.com
PathScale, Inc. Phone: +1 650 934 8117
2071 Stierlin Court, Suite 200 Fax: +1 650 428 1969
Mountain View, CA 94043.
^ permalink raw reply [flat|nested] 70+ messages in thread
* Re: [PATCH 18 of 20] ipath - kbuild infrastructure
2006-03-13 18:10 ` Adrian Bunk
2006-03-13 18:38 ` Robert Walsh
@ 2006-03-13 19:24 ` Bryan O'Sullivan
2006-03-13 19:36 ` Sam Ravnborg
1 sibling, 1 reply; 70+ messages in thread
From: Bryan O'Sullivan @ 2006-03-13 19:24 UTC (permalink / raw)
To: Adrian Bunk
Cc: rjwalsh, rolandd, gregkh, akpm, davem, linux-kernel,
openib-general
On Mon, 2006-03-13 at 19:10 +0100, Adrian Bunk wrote:
> I'm still a bit surprised, since in the rest of the kernel we are even
> going from -O2 to -Os for getting better performance.
>
> Robert said he wanted to post some numbers showing that -O3 is
> measurably better for you [1], but I haven't seen them.
I just ran some numbers. At large packet sizes, it doesn't matter what
options we use, because we spend all of our time in __iowrite_copy32,
which uses the string copy instructions.
For small packets, my quick tests indicate that -Os gives about 5%
*better* performance than -O3 (using gcc 4 on FC4). This is in line
with what people have been finding in the kernel in general recently.
So if I change that CFLAGS line from -O3 to -Os, are we in OK
shape? :-)
> > +_ipath_idstr:="PathScale $(shell date +%F)"
> > +EXTRA_CFLAGS += -DIPATH_IDSTR='$(_ipath_idstr)' -DIPATH_KERN_TYPE=0
> >...
>
> UTS_VERSION is already available and printed at the top of dmesg.
> I don't see the point in printing it a second time.
Good point. The idstr stuff is for our out-of-tree drivers.
Thanks,
<b
^ permalink raw reply [flat|nested] 70+ messages in thread
* Re: [PATCH 18 of 20] ipath - kbuild infrastructure
2006-03-13 19:24 ` Bryan O'Sullivan
@ 2006-03-13 19:36 ` Sam Ravnborg
2006-03-13 19:39 ` Bryan O'Sullivan
0 siblings, 1 reply; 70+ messages in thread
From: Sam Ravnborg @ 2006-03-13 19:36 UTC (permalink / raw)
To: Bryan O'Sullivan
Cc: Adrian Bunk, rjwalsh, rolandd, gregkh, akpm, davem, linux-kernel,
openib-general
On Mon, Mar 13, 2006 at 11:24:28AM -0800, Bryan O'Sullivan wrote:
> On Mon, 2006-03-13 at 19:10 +0100, Adrian Bunk wrote:
>
> > I'm still a bit surprised, since in the rest of the kernel we are even
> > going from -O2 to -Os for getting better performance.
> >
> > Robert said he wanted to post some numbers showing that -O3 is
> > measurably better for you [1], but I haven't seen them.
>
> I just ran some numbers. At large packet sizes, it doesn't matter what
> options we use, because we spend all of our time in __iowrite_copy32,
> which uses the string copy instructions.
>
> For small packets, my quick tests indicate that -Os gives about 5%
> *better* performance than -O3 (using gcc 4 on FC4). This is in line
> with what people have been finding in the kernel in general recently.
>
> So if I change that CFLAGS line from -O3 to -Os, are we in OK
> shape? :-)
Use the kernel settings. We cannot have this modified by each and every
driver.
Sam
^ permalink raw reply [flat|nested] 70+ messages in thread
* Re: [PATCH 18 of 20] ipath - kbuild infrastructure
2006-03-13 19:36 ` Sam Ravnborg
@ 2006-03-13 19:39 ` Bryan O'Sullivan
0 siblings, 0 replies; 70+ messages in thread
From: Bryan O'Sullivan @ 2006-03-13 19:39 UTC (permalink / raw)
To: Sam Ravnborg
Cc: Adrian Bunk, rjwalsh, rolandd, gregkh, akpm, davem, linux-kernel,
openib-general
On Mon, 2006-03-13 at 20:36 +0100, Sam Ravnborg wrote:
> Use the kernel settings. We cannot have this modified by each and every
> driver.
Fair enough.
<b
^ permalink raw reply [flat|nested] 70+ messages in thread
* [PATCH 19 of 20] ipath - integrate driver into infiniband kbuild infrastructure
2006-03-10 0:35 [PATCH 0 of 20] [RFC] ipath driver - another round for review Bryan O'Sullivan
` (17 preceding siblings ...)
2006-03-10 0:35 ` [PATCH 18 of 20] ipath - kbuild infrastructure Bryan O'Sullivan
@ 2006-03-10 0:35 ` Bryan O'Sullivan
2006-03-10 0:35 ` [PATCH 20 of 20] ipath - ethernet emulation driver Bryan O'Sullivan
2006-03-10 15:35 ` [openib-general] [PATCH 0 of 20] [RFC] ipath driver - another round for review Michael S. Tsirkin
20 siblings, 0 replies; 70+ messages in thread
From: Bryan O'Sullivan @ 2006-03-10 0:35 UTC (permalink / raw)
To: rolandd, gregkh, akpm, davem; +Cc: linux-kernel, openib-general
Signed-off-by: Bryan O'Sullivan <bos@pathscale.com>
diff -r 867a396dd518 -r d5a8cb977923 drivers/infiniband/Kconfig
--- a/drivers/infiniband/Kconfig Thu Mar 9 16:17:00 2006 -0800
+++ b/drivers/infiniband/Kconfig Thu Mar 9 16:17:14 2006 -0800
@@ -30,6 +30,7 @@ config INFINIBAND_USER_ACCESS
<http://www.openib.org>.
source "drivers/infiniband/hw/mthca/Kconfig"
+source "drivers/infiniband/hw/ipath/Kconfig"
source "drivers/infiniband/ulp/ipoib/Kconfig"
diff -r 867a396dd518 -r d5a8cb977923 drivers/infiniband/Makefile
--- a/drivers/infiniband/Makefile Thu Mar 9 16:17:00 2006 -0800
+++ b/drivers/infiniband/Makefile Thu Mar 9 16:17:14 2006 -0800
@@ -1,4 +1,5 @@ obj-$(CONFIG_INFINIBAND) += core/
obj-$(CONFIG_INFINIBAND) += core/
obj-$(CONFIG_INFINIBAND_MTHCA) += hw/mthca/
+obj-$(CONFIG_IPATH_CORE) += hw/ipath/
obj-$(CONFIG_INFINIBAND_IPOIB) += ulp/ipoib/
obj-$(CONFIG_INFINIBAND_SRP) += ulp/srp/
^ permalink raw reply [flat|nested] 70+ messages in thread* [PATCH 20 of 20] ipath - ethernet emulation driver
2006-03-10 0:35 [PATCH 0 of 20] [RFC] ipath driver - another round for review Bryan O'Sullivan
` (18 preceding siblings ...)
2006-03-10 0:35 ` [PATCH 19 of 20] ipath - integrate driver into infiniband " Bryan O'Sullivan
@ 2006-03-10 0:35 ` Bryan O'Sullivan
2006-03-10 15:35 ` [openib-general] [PATCH 0 of 20] [RFC] ipath driver - another round for review Michael S. Tsirkin
20 siblings, 0 replies; 70+ messages in thread
From: Bryan O'Sullivan @ 2006-03-10 0:35 UTC (permalink / raw)
To: rolandd, gregkh, akpm, davem; +Cc: linux-kernel, openib-general
The ethernet emulation driver makes an eth* interface available. It
uses Infiniband UD packets, but is not IPoIB compatible. It provides
higher bandwidth and lower latency than IPoIB.
The driver is implemented using the ipath_layer code, as is the ipath
driver's OpenIB support.
Signed-off-by: Bryan O'Sullivan <bos@pathscale.com>
diff -r d5a8cb977923 -r 7f00f404094f drivers/infiniband/hw/ipath/Kconfig
--- a/drivers/infiniband/hw/ipath/Kconfig Thu Mar 9 16:17:14 2006 -0800
+++ b/drivers/infiniband/hw/ipath/Kconfig Thu Mar 9 16:17:14 2006 -0800
@@ -16,3 +16,10 @@ config INFINIBAND_IPATH
allows these devices to be used with both kernel upper level
protocols such as IP-over-InfiniBand as well as with userspace
applications (in conjunction with InfiniBand userspace access).
+
+config IPATH_ETHER
+ tristate "PathScale InfiniPath ethernet driver"
+ depends on IPATH_CORE
+ ---help---
+ This is an ethernet emulator layer for the PathScale InfiniPath
+ host channel adapters (HCAs).
diff -r d5a8cb977923 -r 7f00f404094f drivers/infiniband/hw/ipath/ipath_eth.c
--- /dev/null Thu Jan 1 00:00:00 1970 +0000
+++ b/drivers/infiniband/hw/ipath/ipath_eth.c Thu Mar 9 16:17:14 2006 -0800
@@ -0,0 +1,1187 @@
+/*
+ * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like. Any license provided herein, whether implied or
+ * otherwise, applies only to this software file.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write the Free Software Foundation, Inc., 59
+ * Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ */
+
+/*
+ * ipath_ether.c ethernet driver emulation over PathScale Infinipath
+ * for Linux.
+ */
+
+#define ipath_ether_ioctl_support
+
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+
+#include "ipath_debug.h"
+#include "ips_common.h"
+#include "ipath_layer.h"
+
+/* Not static, because we don't want the compiler removing it */
+#define DRV_NAME "ipath_ether"
+const char ipath_ether_version[] = DRV_NAME " " IPATH_IDSTR;
+#define DRV_VERSION "1.0"
+
+#if _IPATH_DEBUGGING
+
+#define __IPATH_DBG_WHICH(which,fmt,...) \
+ do { \
+ if (unlikely(ipath_debug&(which))) \
+ printk(KERN_DEBUG DRV_NAME ": %s: " fmt, \
+ __func__,##__VA_ARGS__); \
+ } while (0)
+
+#define ipath_eth_dbg(fmt,...) \
+ __IPATH_DBG_WHICH(__IPATH_IPATHDBG,fmt,##__VA_ARGS__)
+#define ipath_eth_cdbg(which,fmt,...) \
+ __IPATH_DBG_WHICH(__IPATH_##which##DBG,fmt,##__VA_ARGS__)
+#define ipath_eth_warn(fmt,...) \
+ __IPATH_DBG_WHICH(__IPATH_IPATHWARN,fmt,##__VA_ARGS__)
+#define ipath_eth_err(fmt,...) \
+ __IPATH_DBG_WHICH(__IPATH_IPATHERR ,fmt,##__VA_ARGS__)
+#define ipath_eth_table(fmt,...) \
+ __IPATH_DBG_WHICH(__IPATH_IPATHTABLE ,fmt,##__VA_ARGS__)
+
+#else
+
+#define ipath_eth_dbg(fmt,...)
+#define ipath_eth_warn(fmt,...)
+#define ipath_eth_err(fmt,...)
+#define ipath_eth_table(fmt,...)
+
+#endif
+
+#define MAX_IPATH_LAYER_DEVICE 4
+#define ETHER_MAC_SIZE 6
+
+#define TX_TIMEOUT 2000
+
+#define BROADCAST_MASK 0x0001
+
+#define IPATH_LAYER_DOWN 0
+#define IPATH_LAYER_UP 1
+
+#define MAC_LENGTH 6
+
+#define MAX_HASH_ENTRIES 4129
+
+#define LID_ARP_REQUEST 1
+#define LID_ARP_RESPONSE 2
+
+#define ETH_ARP_PROTOCOL 0x0806 /* ARP protocol ID */
+
+#define HASH_ALLOC_ENTRIES 256
+
+#define priv_data(dev) ((struct ipath_ether_priv *)(dev)->priv)
+
+#define make_hash_key(mac) ((mac[0] + mac[1] + mac[2]) % MAX_HASH_ENTRIES)
+
+/* This structure is used to reassemble packets for large MTUs. */
+struct ipath_frag_state {
+ spinlock_t lock;
+ struct sk_buff *skb;
+ struct sk_buff *last_skb;
+ uint16_t lid;
+ uint8_t frag_num; /* ips_message_header.unused */
+ uint8_t seq_num; /* ips_message_header.tinylen */
+ uint32_t len; /* ips_message_header.ack_seq_num */
+};
+
+struct ipath_ether_priv {
+ struct ipath_devdata *dd;
+ int device_id;
+ uint16_t my_lid; /* set in network order */
+ uint16_t my_bcast; /* set in network order */
+ uint16_t my_mac_addr[3];
+ int ipath_ether_if_stat;
+ struct net_device_stats ipath_ether_stats;
+ wait_queue_head_t lid_wait; /* when waiting for LID at open */
+ struct copy_data_s cpc;
+ struct ipath_frag_state *fstate; /* Fragment reassembly table */
+ struct ether_header protocol_header;
+};
+
+struct ether_hash { /* _ips_message_header */
+ struct ether_hash *next;
+ uint16_t mac[3];
+ uint16_t lid;
+};
+
+static struct net_device *dev_ipath_ether[MAX_IPATH_LAYER_DEVICE];
+static struct ipath_ether_priv private_data[MAX_IPATH_LAYER_DEVICE];
+static int number_of_devices;
+
+static atomic_t send_continue;
+
+/*
+ * this will have to change to be per-device when we support
+ * multiple infinipath devices that aren't all on the saem fabric
+ */
+static struct ether_hash hash_table[MAX_HASH_ENTRIES];
+static struct ether_hash *all_hash_entries;
+static struct ether_hash *free_hash_entries;
+static DEFINE_SPINLOCK(ipath_ether_lock);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("PathScale <support@pathscale.com>");
+MODULE_DESCRIPTION("Pathscale InfiniPath ethernet driver");
+
+static struct net_device_stats *ipath_ether_get_stats(
+ struct net_device *dev);
+int ipath_ether_init(void);
+void ipath_ether_exit(void);
+
+module_init(ipath_ether_init);
+module_exit(ipath_ether_exit);
+
+static unsigned int ipath_fragtable_size = 1033;
+module_param_named(fragtable_size, ipath_fragtable_size, uint, S_IRUGO);
+MODULE_PARM_DESC(fragtable_size,
+ "size of the fragment reassembly hash table (prime)");
+
+static int _send_lid_message(uint16_t * mac,
+ uint8_t cmd,
+ uint16_t dest_lid, struct net_device *dev)
+{
+ struct ether_header protocol_header;
+ uint32_t total_frame_size_in_words = sizeof(protocol_header) >> 2;
+
+ protocol_header.lrh[0] = htons(IPS_LRH_BTH);
+ protocol_header.lrh[1] = dest_lid; /* DEST LID */
+ protocol_header.lrh[2] =
+ htons(total_frame_size_in_words + SIZE_OF_CRC);
+ protocol_header.lrh[3] =
+ priv_data(dev)->my_lid; /* SRC LID */
+
+ protocol_header.bth[0] =
+ htonl((OPCODE_ITH4X << 24) + IPS_DEFAULT_P_KEY);
+ protocol_header.sub_opcode = OPCODE_LID_ARP;
+
+ protocol_header.bth[1] = htonl(IPATH_KD_QP);
+ protocol_header.bth[2] = 0;
+
+ /* port, version, and TID are already known to be in range, no
+ * masking needed; offset in low INFINIPATH_I_OFFSET_MASK bits */
+ protocol_header.iph.ver_port_tid_offset =
+ (IPS_PROTO_VERSION << INFINIPATH_I_VERS_SHIFT) +
+ (EAGER_TID_ID << INFINIPATH_I_TID_SHIFT);
+ /* port is zero */
+ /* offset is zero */
+
+ /* generate an interrupt on the receive side */
+ protocol_header.iph.pkt_flags = INFINIPATH_KPF_INTR;
+
+ protocol_header.iph.chksum =
+ (uint16_t) IPS_LRH_BTH +
+ (uint16_t) (total_frame_size_in_words + SIZE_OF_CRC) -
+ (uint16_t) ((protocol_header.iph.
+ ver_port_tid_offset >> 16) & 0xFFFF) -
+ (uint16_t) (protocol_header.iph.ver_port_tid_offset &
+ 0xFFFF) -
+ (uint16_t) protocol_header.iph.pkt_flags;
+
+ protocol_header.cmd = cmd;
+ protocol_header.lid =
+ (cmd == LID_ARP_RESPONSE) ? priv_data(dev)->my_lid : 0;
+ protocol_header.mac[0] = mac[0];
+ protocol_header.mac[1] = mac[1];
+ protocol_header.mac[2] = mac[2];
+
+ return ipath_layer_send_hdr(priv_data(dev)->dd, &protocol_header);
+}
+
+/**
+ * _add_mac_lid - add a MAC LID
+ * @mac: the MAC
+ * @lid: the LID
+ @
+ * XXX problem? can grow to unbounded in size.
+ * NOTE: this should only be called from interrupt context.
+ */
+static int _add_mac_lid(uint16_t * mac, uint16_t lid)
+{
+ uint16_t hashkey = make_hash_key(mac);
+ struct ether_hash *hash_entry = &hash_table[hashkey];
+ struct ether_hash *last_entry = NULL;
+ struct ether_hash *index;
+ int counter;
+ int rc = 0;
+
+ /* spin_lock_irq(&ipath_ether_lock); */
+
+ if (!hash_entry->lid) {
+ memcpy(hash_entry->mac, mac, MAC_LENGTH);
+ hash_entry->lid = lid;
+ hash_entry->next = NULL;
+
+ goto _add_mac_lid_complete;
+ }
+
+ while (hash_entry) {
+ if ((hash_entry->mac[0] == mac[0]) &&
+ (hash_entry->mac[1] == mac[1]) &&
+ (hash_entry->mac[2] == mac[2])
+ ) {
+ hash_entry->lid = lid;
+ goto _add_mac_lid_complete;
+ }
+
+ last_entry = hash_entry;
+ hash_entry = hash_entry->next;
+ }
+
+ /* MAC address was not found - so add it! */
+ if (!free_hash_entries) {
+ index = kmalloc(HASH_ALLOC_ENTRIES *
+ sizeof(struct ether_hash), GFP_ATOMIC);
+
+ if (!index) {
+ rc = -1;
+ goto _add_mac_lid_complete;
+ }
+
+ /*
+ * The first entry is used to keep a list of all the
+ * entries.
+ */
+ index->next = all_hash_entries;
+ all_hash_entries = index;
+ free_hash_entries = ++index;
+
+ for (counter = 2; counter < HASH_ALLOC_ENTRIES; counter++) {
+ index->next = index + 1;
+ index++;
+ }
+
+ index->next = NULL;
+ }
+
+ hash_entry = free_hash_entries;
+ free_hash_entries = free_hash_entries->next;
+
+ /* Initialize the new entry before linking into the list. */
+ memcpy(hash_entry->mac, mac, MAC_LENGTH);
+ hash_entry->lid = lid;
+ hash_entry->next = NULL;
+
+ last_entry->next = hash_entry;
+
+_add_mac_lid_complete:
+ /* spin_unlock_irq(&ipath_ether_lock); */
+ return rc;
+}
+
+/**
+ * _lookup_lid - look up the LID for a MAC
+ * @mac: the MAC
+ * @dev: the network device
+ *
+ * LID '0' (zero) is returned when lookup failed.
+ * Since only one CPU can update the list at a time, we are
+ * careful to initialize the entry before linking into the list,
+ * and its a single linked list, the readers can safely walk the list
+ * without holding the lock.
+ */
+static uint16_t _lookup_lid(uint16_t * mac, struct net_device *dev)
+{
+ uint16_t hashkey = make_hash_key(mac);
+ struct ether_hash *hash_entry = &hash_table[hashkey];
+
+ while (hash_entry) {
+ if ((hash_entry->mac[0] == mac[0]) &&
+ (hash_entry->mac[1] == mac[1]) &&
+ (hash_entry->mac[2] == mac[2])
+ )
+ break;
+
+ hash_entry = hash_entry->next;
+ }
+
+ if (hash_entry) {
+ return hash_entry->lid;
+ } else {
+ _send_lid_message(mac, LID_ARP_REQUEST,
+ priv_data(dev)->my_bcast, dev);
+
+ return 0;
+ }
+}
+
+static int ipath_ether_start_xmit(struct sk_buff *skb,
+ struct net_device *dev)
+{
+ struct ether_header *protocol_header =
+ &priv_data(dev)->protocol_header;
+ int rc = 0;
+ uint16_t dest_lid;
+ static uint32_t jumboseq;
+
+ if (skb->data[0] & BROADCAST_MASK) {
+
+ ipath_eth_dbg("Dest MAC: %x:%x:%x:%x:%x:%x\n",
+ ((uint8_t *)skb->data)[0],
+ ((uint8_t *)skb->data)[1],
+ ((uint8_t *)skb->data)[2],
+ ((uint8_t *)skb->data)[3],
+ ((uint8_t *)skb->data)[4],
+ ((uint8_t *)skb->data)[5]);
+
+ dest_lid = priv_data(dev)->my_bcast;
+ if (!dest_lid) {
+ /*
+ * Can't broadcast, broadcast LID isn't set yet.
+ * not the best possible error, but reasonable
+ */
+ dev_kfree_skb(skb);
+ priv_data(dev)->ipath_ether_stats.tx_dropped++;
+ /* just return 0. Old return was -ENOBUFS; */
+ return 0;
+ }
+ } else {
+ dest_lid = _lookup_lid((uint16_t *) skb->data, dev);
+ if (!dest_lid) {
+ dev_kfree_skb(skb);
+ priv_data(dev)->ipath_ether_stats.tx_dropped++;
+ /* just return 0. Old return was -ENOBUFS; */
+ return 0;
+ }
+ }
+
+ if (ipath_debug & __IPATH_IPATHPD) {
+ int loop_count;
+
+ printk("Send:\n");
+ for (loop_count = 0; loop_count < skb->len;
+ loop_count++) {
+ if (!(loop_count % 16))
+ printk("\n");
+
+ printk("%02X ",
+ ((uint8_t *) skb->data)[loop_count]);
+ }
+
+ printk("\n\n");
+ }
+
+ /* This is used as the sequence ID of a jumbo packet. */
+ protocol_header->seq_num = ++jumboseq;
+ /* This is the total length the receiver should expect. */
+ protocol_header->len = skb->len;
+ /*
+ * This is used as the fragment number for segmented jumbo packets.
+ */
+ protocol_header->frag_num = 0;
+
+ /*
+ * Copy 2 bytes of the ethernet header into the infinipath header so
+ * the rest of the data is 32-bit aligned.
+ */
+ protocol_header->first_2_bytes = *((uint16_t *) skb->data);
+ skb_pull(skb, sizeof(uint16_t));
+
+ protocol_header->lrh[0] = htons(IPS_LRH_BTH);
+ protocol_header->lrh[1] = dest_lid;
+ protocol_header->lrh[3] =
+ priv_data(dev)->my_lid; /* SRC LID */
+
+ protocol_header->bth[0] =
+ htonl((OPCODE_ITH4X << 24) + IPS_DEFAULT_P_KEY);
+ protocol_header->sub_opcode = OPCODE_ENCAP;
+
+ protocol_header->bth[1] = htonl(IPATH_KD_QP);
+
+ /* port, version, and TID are already known to be in range, no
+ * masking needed; offset in low INFINIPATH_I_OFFSET_MASK bits */
+ protocol_header->iph.ver_port_tid_offset =
+ (IPS_PROTO_VERSION << INFINIPATH_I_VERS_SHIFT) +
+ (EAGER_TID_ID << INFINIPATH_I_TID_SHIFT);
+ /* port is zero */
+ /* offset is zero */
+
+ protocol_header->flags = NETIF_F_SG;
+ if ((dev->features & NETIF_F_HW_CSUM) &&
+ skb->ip_summed == CHECKSUM_HW)
+ protocol_header->flags |= NETIF_F_HW_CSUM;
+
+ /* init cpc */
+ priv_data(dev)->cpc.hdr = protocol_header;
+ priv_data(dev)->cpc.to = NULL;
+ priv_data(dev)->cpc.error = 0;
+ priv_data(dev)->cpc.extra = 0;
+ priv_data(dev)->cpc.len = skb->len;
+ priv_data(dev)->cpc.flen = 0;
+ priv_data(dev)->cpc.skb = skb;
+ priv_data(dev)->cpc.csum = 0;
+ priv_data(dev)->cpc.pos = 0;
+ priv_data(dev)->cpc.offset = 0;
+ priv_data(dev)->cpc.checksum_calc = 0;
+
+ rc = ipath_layer_send_skb(priv_data(dev)->dd, &priv_data(dev)->cpc);
+ if (rc == 0) {
+ priv_data(dev)->ipath_ether_stats.tx_packets++;
+ priv_data(dev)->ipath_ether_stats.tx_bytes += skb->len;
+
+ priv_data(dev)->cpc.skb = NULL;
+ dev_kfree_skb(skb);
+ } else {
+ netif_stop_queue(dev);
+
+ if (rc == -ENOBUFS)
+ priv_data(dev)->ipath_ether_stats.tx_fifo_errors++;
+
+ if (rc == -EBUSY) {
+ atomic_set(&send_continue, 1);
+ ipath_layer_set_piointbufavail_int(
+ priv_data(dev)->dd);
+ rc = 0;
+ }
+ }
+
+ return rc;
+}
+
+/**
+ * ipath_ether_process_lid_arp - process an ARP message for a LID
+ * @device: the network device
+ * @hdr: the message header
+ */
+static int ipath_ether_process_lid_arp(int device, void *hdr)
+{
+ struct ipath_ether_priv *priv = &private_data[device];
+ struct ether_header *ihdr = (struct ether_header *) hdr;
+
+ switch (ihdr->cmd) {
+ case LID_ARP_REQUEST:
+ if ((priv->my_mac_addr[0] == ihdr->mac[0]) &&
+ (priv->my_mac_addr[1] == ihdr->mac[1]) &&
+ (priv->my_mac_addr[2] == ihdr->mac[2])) {
+ _send_lid_message(priv->my_mac_addr,
+ LID_ARP_RESPONSE,
+ ihdr->lrh[3],
+ dev_ipath_ether[device]);
+ }
+ break;
+
+ case LID_ARP_RESPONSE:
+ spin_lock_irq(&ipath_ether_lock);
+ _add_mac_lid(ihdr->mac, ihdr->lid);
+ spin_unlock_irq(&ipath_ether_lock);
+ break;
+ }
+
+ return 0;
+}
+
+/**
+ * get_state - get fragment state
+ * @table: the fragment state table
+ * @lid: the LID
+ *
+ * The purpose of the fragment reassembly hash table is to reduce the
+ * probability of losing state due to hash collisions.
+ * In order to add the least amount of overhead, there is no locking used
+ * on the lookup and a LID hashes to only one entry.
+ * Locking would be required if we tried to support removal of entries or
+ * dynamically growing the hash table.
+ */
+static inline struct ipath_frag_state *get_state(
+ struct ipath_frag_state *table, uint16_t lid)
+{
+ unsigned int probe = lid % ipath_fragtable_size;
+ struct ipath_frag_state *entry = table + probe;
+
+ return entry;
+}
+
+/**
+ * ipath_ether_rx - receive an ethernet packet
+ * @device: the network device
+ * @hdr: the packet header
+ * @skb: the sk_buff
+ *
+ * Callback handler called by the lower layer.
+ * Note that the skb is now our responsibility to either pass to the
+ * network stack or free it.
+ */
+static int ipath_ether_rx(int device, void *hdr, struct sk_buff *skb)
+{
+ struct ether_header *ihdr = (struct ether_header *) hdr;
+ struct ipath_ether_priv *priv = &private_data[device];
+ struct ipath_frag_state *fs = get_state(priv->fstate, ihdr->lrh[3]);
+ struct sk_buff *lskb;
+ uint16_t *h;
+
+ spin_lock_irq(&fs->lock);
+ lskb = fs->skb;
+ if (lskb != NULL) {
+ if (fs->lid != ihdr->lrh[3] ||
+ fs->seq_num != ihdr->seq_num ||
+ fs->frag_num != ihdr->frag_num) {
+
+ ipath_eth_warn("Drop %x %x, %u %u, %u %u, "
+ "%u %u, %x\n", fs->lid,
+ ihdr->lrh[3], fs->seq_num,
+ ihdr->seq_num, fs->frag_num,
+ ihdr->frag_num, fs->len,
+ ihdr->len,
+ ihdr->flags); /* XXX */
+
+ dev_kfree_skb_irq(lskb);
+ fs->skb = NULL;
+ if (fs->lid != ihdr->lrh[3])
+ priv->ipath_ether_stats.collisions++;
+ else
+ priv->ipath_ether_stats.rx_dropped++;
+ goto restart;
+ }
+ fs->frag_num++;
+ /*
+ * Linux network stack expects the last buff's next pointer
+ * to be NULL.
+ */
+ if (skb_shinfo(lskb)->frag_list == NULL)
+ skb_shinfo(lskb)->frag_list = skb;
+ else
+ fs->last_skb->next = skb;
+ fs->last_skb = skb;
+ lskb->len += skb->len;
+ lskb->data_len += skb->len;
+ } else {
+ restart:
+ /* Check to be sure this is the first fragment. */
+ if (ihdr->frag_num != 0) {
+ spin_unlock_irq(&fs->lock);
+ dev_kfree_skb_irq(skb);
+ priv->ipath_ether_stats.rx_dropped++;
+ return 0;
+ }
+ skb->dev = dev_ipath_ether[device];
+ skb->ip_summed = (ihdr->flags & NETIF_F_NO_CSUM) ?
+ CHECKSUM_UNNECESSARY : CHECKSUM_NONE;
+ fs->skb = skb;
+ fs->lid = ihdr->lrh[3]; /* src LID */
+ fs->len = ihdr->len;
+ fs->frag_num = 1; /* next expected frag number */
+ fs->seq_num = ihdr->seq_num;
+ /*
+ * Copy two bytes of the ethernet hdr from the infinipath
+ * hdr
+ */
+ h = (uint16_t *) skb_push(skb, 2);
+ *h = ihdr->first_2_bytes;
+
+ /*
+ * Is this an ARP frame?
+ * The data should now contain the 6 byte destination
+ * ether address, the source ether address, and then
+ * the protocol field.
+ */
+ if (h[6] == htons(ETH_ARP_PROTOCOL))
+ _add_mac_lid(&h[3], ihdr->lrh[3]);
+ }
+
+ fs->len -= skb->len;
+ if (fs->len == 0) {
+ skb = fs->skb;
+ fs->skb = NULL;
+ spin_unlock_irq(&fs->lock);
+
+ /* Stuff the checksum back into the message. */
+ if (ihdr->flags & NETIF_F_HW_CSUM) {
+ /*
+ * Check to be sure the offset is in the first
+ * fragment.
+ */
+ if (ihdr->csum_offset < skb_headlen(skb)) {
+ *((uint16_t *) (skb->data +
+ ihdr->csum_offset)) =
+ ihdr->csum;
+ } else {
+ /*
+ * This should "never happen" so drop
+ * packet to be safe.
+ */
+ dev_kfree_skb_irq(skb);
+ priv->ipath_ether_stats.rx_dropped++;
+ return 0;
+ }
+ }
+
+ if (ipath_debug & __IPATH_IPATHPD) {
+ int loop_count;
+
+ printk("Recv:\n");
+ for (loop_count = 0; loop_count < skb->len;
+ loop_count++) {
+ if (!(loop_count % 16))
+ printk("\n");
+
+ printk("%02X ", skb->data[loop_count]);
+ }
+
+ printk("\n\n");
+ }
+
+ priv->ipath_ether_stats.rx_packets++;
+ priv->ipath_ether_stats.rx_bytes += skb->len;
+ skb->protocol = eth_type_trans(skb, skb->dev);
+ netif_rx(skb);
+ } else
+ spin_unlock_irq(&fs->lock);
+ dev_ipath_ether[device]->last_rx = jiffies;
+
+ return 0;
+}
+
+/**
+ * ipath_ether_interrupt - ether driver interrupt handler
+ * @device: the infinipath device number
+ * @interrupts: the interrupt mask
+ */
+static int ipath_ether_interrupt(int device, uint32_t interrupts)
+{
+ struct ipath_ether_priv *priv = &private_data[device];
+ unsigned wakeup_needed = 0;
+ int rc = 0;
+
+ ipath_eth_cdbg(VERBOSE, "Took ipath_ether_interrupt\n");
+
+ /*
+ * This can happen when hardware initialization fails in some way,
+ * and may avoid other bugs as well.
+ */
+ if ((uint32_t) device > MAX_IPATH_LAYER_DEVICE ||
+ !dev_ipath_ether[device]) {
+ ipath_eth_warn("ipath device %u not initialized, "
+ "ignoring interrupt\n", device);
+ return 0;
+ }
+
+ if (interrupts & IPATH_LAYER_INT_SEND_CONTINUE) {
+ if (atomic_dec_and_test(&send_continue)) {
+ if (priv->cpc.skb)
+ ipath_layer_send_skb(priv->dd, &priv->cpc);
+
+ if (priv->cpc.error == 0) {
+ if (priv->cpc.skb) {
+ dev_kfree_skb_any(priv->cpc.skb);
+ priv->cpc.skb = NULL;
+ }
+
+ netif_wake_queue(dev_ipath_ether[device]);
+ } else {
+ atomic_set(&send_continue, 1);
+
+ rc = 1; /* don't clean the interrupt */
+ }
+ }
+ }
+
+ if (interrupts & IPATH_LAYER_INT_IF_DOWN) {
+ priv->ipath_ether_if_stat = IPATH_LAYER_DOWN;
+ dev_ipath_ether[device]->flags &= ~IFF_UP;
+ netif_stop_queue(dev_ipath_ether[device]);
+ }
+
+ if (interrupts & IPATH_LAYER_INT_LID) {
+ wakeup_needed = 1;
+
+ if (!priv->my_mac_addr[0] && !priv->my_mac_addr[1] &&
+ !priv->my_mac_addr[2]) {
+ if (ipath_layer_get_mac
+ (priv->dd, (uint8_t *) priv->my_mac_addr)) {
+ ipath_eth_warn("Fall back to default OUI, "
+ "couldn't get MAC\n");
+ priv->my_mac_addr[0] = IPATH_SRC_OUI_1 |
+ (IPATH_SRC_OUI_2 << 8);
+ priv->my_mac_addr[1] = IPATH_SRC_OUI_3;
+ }
+ }
+
+ /* convert to network order */
+ priv->my_lid = htons(ipath_layer_get_lid(priv->dd));
+
+ memcpy(dev_ipath_ether[device]->dev_addr,
+ priv->my_mac_addr,
+ dev_ipath_ether[device]->addr_len);
+
+ /*
+ * else get it below, after possible BCAST processing as
+ * well or at open if mcast lid times out
+ */
+ }
+
+ if (interrupts & IPATH_LAYER_INT_BCAST) {
+ wakeup_needed = 1;
+ /*
+ * we may never get this, because some SMs don't support
+ * multicast, so at open, we will do the same thing if the
+ * wait for bcast times out
+ */
+ priv->my_bcast = htons(ipath_layer_get_bcast(priv->dd));
+ }
+
+ if (interrupts & IPATH_LAYER_INT_IF_UP) {
+ /* after LID/MLID processing */
+ priv->ipath_ether_if_stat = IPATH_LAYER_UP;
+ /* in case we get both set as result of open */
+ if (priv->my_lid && priv->my_bcast) {
+ netif_wake_queue(dev_ipath_ether[device]);
+ dev_ipath_ether[device]->flags |= IFF_UP;
+ }
+ }
+
+ if (wakeup_needed) {
+ /*
+ * arguably this should be waiting for lid and mlid,
+ * but since mlid isn't the only possible path for now,
+ * just wait for the lid.
+ */
+ wake_up_interruptible(&priv->lid_wait);
+ }
+
+ return rc;
+}
+
+static int ipath_ether_open(struct net_device *dev)
+{
+ uint32_t mtu;
+ int rc;
+
+ rc = ipath_layer_open(priv_data(dev)->dd, &mtu);
+ if (rc != 0)
+ return rc;
+
+ /*
+ * wait here until LID is set, otherwise "standard" networking
+ * over ipath won't work, because we'll continue on through
+ * starting up networking services, but ipath won't yet be usable,
+ * since it takes up to 30 seconds for SM and sma to chat and get
+ * our LID assigned.
+ */
+ wait_event_interruptible_timeout(priv_data(dev)->lid_wait,
+ priv_data(dev)->my_lid, 75 * HZ);
+
+ if (!priv_data(dev)->my_lid) {
+ ipath_eth_err("ipath_ether_open timed out waiting for LID -"
+ " can't send packets\n");
+
+ return -EPERM;
+ }
+
+ wait_event_interruptible_timeout(priv_data(dev)->lid_wait,
+ priv_data(dev)->my_bcast, 75 * HZ);
+
+ if (!priv_data(dev)->my_bcast) {
+ ipath_eth_err("ipath_ether_open timed out waiting for "
+ "MLID - can't send packets\n");
+
+ return -EPERM;
+ }
+
+ _send_lid_message(priv_data(dev)->my_mac_addr,
+ LID_ARP_RESPONSE, priv_data(dev)->my_bcast, dev);
+
+ dev->flags |= IFF_UP;
+ netif_wake_queue(dev);
+
+ return 0;
+}
+
+static int ipath_ether_close(struct net_device *dev)
+{
+ netif_stop_queue(dev);
+
+ return 0;
+}
+
+static struct net_device_stats *ipath_ether_get_stats(
+ struct net_device *dev)
+{
+ return &priv_data(dev)->ipath_ether_stats;
+}
+
+static int ipath_ether_change_mtu(struct net_device *dev, int new_mtu)
+{
+ /*
+ * The MTU isn't really limited but we set an arbitrary limit of
+ * 16 * 2108 - 12. Which is 16 max infiniband sized packets minus
+ * the ethernet header (except for the 2 bytes we put in the
+ * ether_header header).
+ */
+ if ((new_mtu < 68) || new_mtu > 33716 || (new_mtu & 3))
+ return -EINVAL;
+ dev->mtu = new_mtu;
+ return 0;
+}
+
+static void ipath_ether_set_multicast_list(struct net_device *dev)
+{
+ struct dev_mc_list *mc_mac_entry = dev->mc_list;
+
+ /*
+ * No entries are really added but the can be displayed for debug
+ * purpose
+ */
+
+ while (mc_mac_entry) {
+ ipath_eth_table("Adding multicast MAC "
+ "[%02x:%02x:%02x:%02x:%02x:%02x]\n",
+ mc_mac_entry->dmi_addr[0],
+ mc_mac_entry->dmi_addr[1],
+ mc_mac_entry->dmi_addr[2],
+ mc_mac_entry->dmi_addr[3],
+ mc_mac_entry->dmi_addr[4],
+ mc_mac_entry->dmi_addr[5]);
+
+ mc_mac_entry = mc_mac_entry->next;
+ }
+}
+
+#ifdef ipath_ether_ioctl_support
+
+/**
+ * ipath_ether_get_settings - get ethernet device settings
+ * @dev: the network device
+ * @ecmd: the results are placed here
+ *
+ * This function is here to allow "ethtool eth<N>" to report something
+ * reasonable for infinipath. We return values for 10Gb ethernet
+ * as being reasonably similar.
+ */
+static int ipath_ether_get_settings(struct net_device *dev,
+ struct ethtool_cmd *ecmd)
+{
+ ecmd->supported = SUPPORTED_10000baseT_Full;
+ ecmd->port = PORT_TP;
+ ecmd->transceiver = XCVR_INTERNAL;
+ ecmd->advertising = ADVERTISED_10000baseT_Full;
+ ecmd->speed = SPEED_10000;
+ ecmd->duplex = DUPLEX_FULL;
+ return 0;
+}
+
+static void ipath_ether_get_drvinfo(struct net_device *dev,
+ struct ethtool_drvinfo *info)
+{
+ strcpy(info->driver, DRV_NAME);
+ strcpy(info->version, DRV_VERSION);
+ sprintf(info->bus_info, "InfiniPath");
+}
+
+static u32 ipath_ether_get_rx_csum(struct net_device *dev)
+{
+ return 0;
+}
+
+static u32 ipath_ether_get_tx_csum(struct net_device *dev)
+{
+ return (dev->features & NETIF_F_HW_CSUM) != 0;
+}
+
+static int ipath_ether_set_tx_csum(struct net_device *dev, u32 data)
+{
+ if (data)
+ dev->features |= NETIF_F_HW_CSUM;
+ else
+ dev->features &= ~NETIF_F_HW_CSUM;
+ return 0;
+}
+
+static int ipath_ether_get_tables(struct net_device *dev)
+{
+ int counter;
+ int index;
+ struct ether_hash *hash_entry;
+ uint8_t *mac_byte_ptr;
+ int num_of_entries = 0;
+
+ /* Only dump the hash table if the interface is up */
+ if (!(dev->flags & IFF_UP))
+ return 0;
+
+ ipath_eth_table("Dumping hash table ..\n");
+ for (counter = 0; counter < MAX_HASH_ENTRIES; counter++) {
+ hash_entry = &hash_table[counter];
+
+ if (hash_entry->lid == 0)
+ continue;
+
+ index = 1;
+ do {
+ num_of_entries++;
+
+ mac_byte_ptr = (uint8_t *) hash_entry->mac;
+ ipath_eth_table("%4d.%02d MAC = "
+ "%02x:%02x:%02x:%02x:%02x:%02x, "
+ "LID = %4d [0x%04x]\n",
+ counter, index++, mac_byte_ptr[0],
+ mac_byte_ptr[1], mac_byte_ptr[2],
+ mac_byte_ptr[3], mac_byte_ptr[4],
+ mac_byte_ptr[5],
+ ntohs(hash_entry->lid),
+ ntohs(hash_entry->lid));
+ } while ((hash_entry = hash_entry->next) != NULL);
+ }
+
+ ipath_eth_table("# of entries is %i\n", num_of_entries);
+
+ return 0;
+}
+
+static struct ethtool_ops ipath_ether_ethtool_ops = {
+ .get_settings = ipath_ether_get_settings,
+ .get_drvinfo = ipath_ether_get_drvinfo,
+ .get_rx_csum = ipath_ether_get_rx_csum,
+ .get_tx_csum = ipath_ether_get_tx_csum,
+ .set_tx_csum = ipath_ether_set_tx_csum,
+ .set_sg = ethtool_op_set_sg,
+ .get_sg = ethtool_op_get_sg,
+ .get_tso = ethtool_op_get_tso,
+ .get_stats_count = ipath_ether_get_tables
+};
+
+static int ipath_ether_ioctl(struct net_device *dev, struct ifreq *ifr,
+ int cmd)
+{
+ switch (cmd) {
+
+ case SIOCGMIIPHY: /* Get address of MII PHY in use. */
+ ipath_eth_dbg("Get address of MII PHY in use [%x]\n", cmd);
+ return 0;
+ case SIOCGMIIREG: /* Read MII PHY register. */
+ ipath_eth_dbg("Read MII PHY register [%x]\n", cmd);
+ return 0;
+ case SIOCSMIIREG: /* Write to MII PHY register. */
+ ipath_eth_dbg("Write to MII PHY register [%x]\n", cmd);
+ return 0;
+
+ case 0x8b01 /*SIOCGIWNAME*/:
+ /*
+ * Wireless getname; see this on every startup, so
+ * don't complain about it; don't want to include
+ * wireless.h, so just use the value
+ */
+ return -EOPNOTSUPP;
+
+ default:
+ /*
+ * need to make this conditional, or remove it, some day
+ * for now, we want to know about ioctls we get that we
+ * don't support
+ */
+ ipath_eth_dbg("got unsupported ipath_ether_ioctl with "
+ "cmd = %x\n", cmd);
+ return -EOPNOTSUPP;
+ }
+}
+#endif
+
+int __init ipath_ether_probe(int device)
+{
+ struct ipath_devdata *dd;
+ int rc = -ENODEV;
+ unsigned int i;
+
+ /*
+ * check for being able to register first, in case fewer infinipath
+ * devices are present than are supported; we don't want to register
+ * network devices for non-existent infinipath devices.
+ */
+ rc = ipath_layer_register(device,
+ ipath_ether_interrupt,
+ ipath_ether_rx,
+ OPCODE_ITH4X,
+ ipath_ether_process_lid_arp, OPCODE_ITH4X,
+ &dd);
+ if (rc < 0) {
+ ipath_eth_warn("Unable to register device %u: %d\n", device,
+ -rc);
+ /*
+ * this could be just fine, since we may have fewer than the
+ * max supported chips present
+ */
+ return -ENODEV;
+ }
+
+ dev_ipath_ether[device] = alloc_etherdev(32);
+ if (dev_ipath_ether[device] == NULL)
+ goto ipath_ether_probe_exit_level_0;
+
+ dev_ipath_ether[device]->priv = &private_data[device];
+
+ memset(&private_data[device], 0, sizeof(struct ipath_ether_priv));
+
+ SET_MODULE_OWNER(dev_ipath_ether[device]);
+
+ private_data[device].dd = dd;
+ private_data[device].device_id = device;
+ init_waitqueue_head(&private_data[device].lid_wait);
+
+ dev_ipath_ether[device]->flags &= ~IFF_UP;
+
+ dev_ipath_ether[device]->mtu = 16384;
+
+ /* The ipath_ether-specific entries in the device structure. */
+ dev_ipath_ether[device]->open = ipath_ether_open;
+ dev_ipath_ether[device]->hard_start_xmit = ipath_ether_start_xmit;
+ dev_ipath_ether[device]->stop = ipath_ether_close;
+ dev_ipath_ether[device]->get_stats = ipath_ether_get_stats;
+ dev_ipath_ether[device]->change_mtu = ipath_ether_change_mtu;
+ dev_ipath_ether[device]->set_multicast_list =
+ ipath_ether_set_multicast_list;
+ dev_ipath_ether[device]->tx_timeout = NULL;
+ dev_ipath_ether[device]->watchdog_timeo = TX_TIMEOUT;
+ dev_ipath_ether[device]->features |= NETIF_F_HW_CSUM | NETIF_F_SG |
+ NETIF_F_FRAGLIST | NETIF_F_HIGHDMA;
+
+#ifdef ipath_ether_ioctl_support
+ dev_ipath_ether[device]->do_ioctl = ipath_ether_ioctl;
+ dev_ipath_ether[device]->ethtool_ops = &ipath_ether_ethtool_ops;
+#else
+ dev_ipath_ether[device]->do_ioctl = NULL;
+#endif
+
+ private_data[device].fstate =
+ kzalloc(ipath_fragtable_size *
+ sizeof(struct ipath_frag_state), GFP_ATOMIC);
+
+ if (private_data[device].fstate == NULL) {
+ rc = -ENOMEM;
+ goto ipath_ether_probe_exit_level_0;
+ }
+
+ for (i = 0; i < ipath_fragtable_size; i++)
+ spin_lock_init(&private_data[device].fstate[i].lock);
+
+ /* make sure that the queue is inactive */
+ netif_stop_queue(dev_ipath_ether[device]);
+
+ /*
+ * make an attempt to get our MAC address before registering with
+ * the network layer. This works as long as we are not overriding
+ * the GUID or getting it from some method other than the flash. It
+ * increases the likelihood of SuSE network configuration working,
+ * and is pretty much the right thing to do, in any case.
+ */
+ (void)ipath_layer_get_mac(
+ private_data[device].dd,
+ (uint8_t *) private_data[device].my_mac_addr);
+ memcpy(dev_ipath_ether[device]->dev_addr,
+ private_data[device].my_mac_addr,
+ dev_ipath_ether[device]->addr_len);
+
+ strcpy(dev_ipath_ether[device]->name, "eth%d");
+ rc = register_netdev(dev_ipath_ether[device]);
+ if (rc != 0)
+ goto ipath_ether_probe_exit_level_1;
+
+ private_data[device].ipath_ether_stats.tx_fifo_errors = 0;
+ private_data[device].ipath_ether_stats.tx_carrier_errors = 0;
+
+ return 0;
+
+ipath_ether_probe_exit_level_1:
+ if (private_data[device].fstate != NULL) {
+ kfree(private_data[device].fstate);
+ private_data[device].fstate = NULL;
+ }
+
+ free_netdev(dev_ipath_ether[device]);
+
+ipath_ether_probe_exit_level_0:
+ return rc;
+}
+
+int __init ipath_ether_init(void)
+{
+ int counter, nfound = 0;
+ int rc, lasterr = 0;
+
+ /* safety checks */
+ if (!&ipath_debug) {
+ /*
+ * This has occasionally been seen when the module load code
+ * has errors loading dependent modules. This prevents an
+ * oops, and makes it more obvious what happened. Have to
+ * use printk() directly for this one
+ */
+ printk(KERN_ERR "Module error, %s loading, but ipath_core "
+ "not loaded!\n", DRV_NAME);
+ return -ENODEV;
+ }
+ if (sizeof(struct ips_message_header) !=
+ sizeof(struct ether_header)) {
+ ipath_eth_err("FATAL ERROR (ipath_ether_init): header size "
+ "is wrong [%i<>%i]!!!\n",
+ (int)sizeof(struct ips_message_header),
+ (int)sizeof(struct ether_header));
+ return -ENODEV;
+ }
+
+ number_of_devices = ipath_layer_get_num_of_dev();
+
+ for (counter = 0; counter < number_of_devices; counter++) {
+ rc = ipath_ether_probe(counter);
+ if (rc)
+ lasterr = rc;
+ else
+ nfound++;
+ }
+ if (!nfound)
+ return lasterr; /* no usable devices were found */
+
+ return 0;
+}
+
+void __exit ipath_ether_exit(void)
+{
+ int counter, ninuse = 0;
+
+ for (counter = 0; counter < number_of_devices; counter++) {
+ ipath_layer_close(private_data[counter].dd);
+
+ if (!dev_ipath_ether[counter])
+ /*
+ * never registered, probably infinipath device
+ * not present
+ */
+ continue;
+ ninuse++;
+ unregister_netdev(dev_ipath_ether[counter]);
+ free_netdev(dev_ipath_ether[counter]);
+
+ dev_ipath_ether[counter] = NULL;
+
+ if (private_data[counter].fstate != NULL) {
+ kfree(private_data[counter].fstate);
+ private_data[counter].fstate = NULL;
+ }
+ }
+
+ if (ninuse <= 1) { /* only if none are in use */
+ while (all_hash_entries) {
+ struct ether_hash *next = all_hash_entries->next;
+
+ kfree(all_hash_entries);
+ all_hash_entries = next;
+ }
+ }
+}
^ permalink raw reply [flat|nested] 70+ messages in thread* Re: [openib-general] [PATCH 0 of 20] [RFC] ipath driver - another round for review
2006-03-10 0:35 [PATCH 0 of 20] [RFC] ipath driver - another round for review Bryan O'Sullivan
` (19 preceding siblings ...)
2006-03-10 0:35 ` [PATCH 20 of 20] ipath - ethernet emulation driver Bryan O'Sullivan
@ 2006-03-10 15:35 ` Michael S. Tsirkin
2006-03-10 16:02 ` Bryan O'Sullivan
20 siblings, 1 reply; 70+ messages in thread
From: Michael S. Tsirkin @ 2006-03-10 15:35 UTC (permalink / raw)
To: Bryan O'Sullivan
Cc: rolandd, gregkh, akpm, davem, linux-kernel, openib-general
Quoting r. Bryan O'Sullivan <bos@pathscale.com>:
> - We've added an ethernet emulation driver so that if you're not
> using Infiniband support, you still have a high-performance net
> device (lower latency and higher bandwidth than IPoIB) for IP
> traffic.
Two questions on this
1. It is not standard ethernet nor standard IP over Infiniband either, is it?
Is there some documentation on the wire protocol that you use?
Is it pathscale specific?
2. Are there practical reasons why you get lower latency and higher
bandwidth with this than with IPoIB? IP over IB simply encapsulates
each packet within a UD work request, so I don't see anything here that
might introduce extra latency or limit bandwidth.
If there are optimizations, can they not be added to the standard, common
IP over IB driver?
--
Michael S. Tsirkin
Staff Engineer, Mellanox Technologies
^ permalink raw reply [flat|nested] 70+ messages in thread* Re: [openib-general] [PATCH 0 of 20] [RFC] ipath driver - another round for review
2006-03-10 15:35 ` [openib-general] [PATCH 0 of 20] [RFC] ipath driver - another round for review Michael S. Tsirkin
@ 2006-03-10 16:02 ` Bryan O'Sullivan
2006-03-10 17:48 ` Grant Grundler
0 siblings, 1 reply; 70+ messages in thread
From: Bryan O'Sullivan @ 2006-03-10 16:02 UTC (permalink / raw)
To: Michael S. Tsirkin
Cc: rolandd, gregkh, akpm, davem, linux-kernel, openib-general
On Fri, 2006-03-10 at 17:35 +0200, Michael S. Tsirkin wrote:
> Two questions on this
> 1. It is not standard ethernet nor standard IP over Infiniband either, is it?
Correct.
> Is there some documentation on the wire protocol that you use?
No, but the encapsulation is very simple and easy to figure out from
reading the code.
> Is it pathscale specific?
It doesn't have to be.
> 2. Are there practical reasons why you get lower latency and higher
> bandwidth with this than with IPoIB?
The principal reason is that we haven't had time to pay attention to
IPoIB performance yet. The ipath_ether driver was developed before
IPoIB was usable for any real work.
> If there are optimizations, can they not be added to the standard, common
> IP over IB driver?
That's certainly our intention. It's simply a matter of finding the
time for it.
<b
^ permalink raw reply [flat|nested] 70+ messages in thread
* Re: [openib-general] [PATCH 0 of 20] [RFC] ipath driver - another round for review
2006-03-10 16:02 ` Bryan O'Sullivan
@ 2006-03-10 17:48 ` Grant Grundler
2006-03-10 17:54 ` Bryan O'Sullivan
0 siblings, 1 reply; 70+ messages in thread
From: Grant Grundler @ 2006-03-10 17:48 UTC (permalink / raw)
To: Bryan O'Sullivan
Cc: Michael S. Tsirkin, akpm, gregkh, linux-kernel, openib-general,
davem
On Fri, Mar 10, 2006 at 08:02:16AM -0800, Bryan O'Sullivan wrote:
> > Two questions on this
> > 1. It is not standard ethernet nor standard IP over Infiniband either, is it?
>
> Correct.
>
> > Is there some documentation on the wire protocol that you use?
>
> No, but the encapsulation is very simple and easy to figure out from
> reading the code.
>
...
> > 2. Are there practical reasons why you get lower latency and higher
> > bandwidth with this than with IPoIB?
>
> The principal reason is that we haven't had time to pay attention to
> IPoIB performance yet. The ipath_ether driver was developed before
> IPoIB was usable for any real work.
My gut feeling is you want to look at SDP first.
I'm skeptical that yet another wire protocol will get
accepted into the linux kernel.
grant
^ permalink raw reply [flat|nested] 70+ messages in thread
* Re: [openib-general] [PATCH 0 of 20] [RFC] ipath driver - another round for review
2006-03-10 17:48 ` Grant Grundler
@ 2006-03-10 17:54 ` Bryan O'Sullivan
2006-03-10 22:30 ` Grant Grundler
0 siblings, 1 reply; 70+ messages in thread
From: Bryan O'Sullivan @ 2006-03-10 17:54 UTC (permalink / raw)
To: Grant Grundler
Cc: Michael S. Tsirkin, akpm, gregkh, linux-kernel, openib-general,
davem
On Fri, 2006-03-10 at 09:48 -0800, Grant Grundler wrote:
> My gut feeling is you want to look at SDP first.
We already implement SDP.
> I'm skeptical that yet another wire protocol will get
> accepted into the linux kernel.
It's just a simple net device driver.
<b
^ permalink raw reply [flat|nested] 70+ messages in thread
* Re: [openib-general] [PATCH 0 of 20] [RFC] ipath driver - another round for review
2006-03-10 17:54 ` Bryan O'Sullivan
@ 2006-03-10 22:30 ` Grant Grundler
2006-03-11 4:20 ` Bryan O'Sullivan
0 siblings, 1 reply; 70+ messages in thread
From: Grant Grundler @ 2006-03-10 22:30 UTC (permalink / raw)
To: Bryan O'Sullivan
Cc: Michael S. Tsirkin, akpm, gregkh, linux-kernel, openib-general,
davem
On Fri, Mar 10, 2006 at 09:54:19AM -0800, Bryan O'Sullivan wrote:
> On Fri, 2006-03-10 at 09:48 -0800, Grant Grundler wrote:
>
> > My gut feeling is you want to look at SDP first.
>
> We already implement SDP.
ah ok.
Is your SDP slower than the "ethernet emulation" for message passing?
> > I'm skeptical that yet another wire protocol will get
> > accepted into the linux kernel.
>
> It's just a simple net device driver.
I guess I need to look at the code if I want to understand
what "ethernet emulation" and "simple net device driver"
exactly mean.
You missed the netdev and netfilter guys ranting when Infiniband
promoters proprosed putting a switch in the kernel to bypass
the TCP/IP stack when SDP was available. This happened at OLS2004
Infiniband BOF. Very strong opposition to SDP masquerading
as AF_INET. SDP is squatting on AT_INET_SDP (27) until it
gets integrated in the kernel.
hth,
grant
^ permalink raw reply [flat|nested] 70+ messages in thread
* Re: [openib-general] [PATCH 0 of 20] [RFC] ipath driver - another round for review
2006-03-10 22:30 ` Grant Grundler
@ 2006-03-11 4:20 ` Bryan O'Sullivan
0 siblings, 0 replies; 70+ messages in thread
From: Bryan O'Sullivan @ 2006-03-11 4:20 UTC (permalink / raw)
To: Grant Grundler
Cc: Michael S. Tsirkin, akpm, gregkh, linux-kernel, openib-general,
davem
On Fri, 2006-03-10 at 14:30 -0800, Grant Grundler wrote:
> > We already implement SDP.
>
> ah ok.
> Is your SDP slower than the "ethernet emulation" for message passing?
I don't recall off the top of my head.
> You missed the netdev and netfilter guys ranting when Infiniband
> promoters proprosed putting a switch in the kernel to bypass
> the TCP/IP stack when SDP was available.
No, I saw that happen. The ipath_ether driver doesn't bypass anything
in any way.
<b
--
Bryan O'Sullivan <bos@pathscale.com>
^ permalink raw reply [flat|nested] 70+ messages in thread