* [PATCH 0/2] Remove the sgi-gru and sgi-xp drivers
@ 2026-07-31 14:26 Dimitri Sivanich
2026-07-31 14:30 ` [PATCH 1/2] misc: sgi-xp: Remove SGI XP drivers Dimitri Sivanich
2026-07-31 14:37 ` [PATCH 2/2] misc: sgi-gru: Remove SGI GRU driver Dimitri Sivanich
0 siblings, 2 replies; 8+ messages in thread
From: Dimitri Sivanich @ 2026-07-31 14:26 UTC (permalink / raw)
To: Greg Kroah-Hartman
Cc: Steve Wahl, Anderson, Russ, Robin Holt, Arnd Bergmann, Kees Cook,
Russell King, Andrew Morton, David Hildenbrand (Arm),
Lorenzo Stoakes (Oracle), Muhammad Usama Anjum, netdev,
linux-kernel, Dimitri Sivanich
Due to security concerns, remove the SGI GRU driver, which cannot be used on
anything newer than the long time unsupported UV2 platform. Since working
sgi-xp drivers require the GRU driver, remove sgi-xp as well.
Dimitri Sivanich (2):
misc: sgi-xp: Remove SGI XP drivers
misc: sgi-gru: Remove SGI GRU driver
MAINTAINERS | 11 -
drivers/misc/Kconfig | 34 -
drivers/misc/Makefile | 2 -
drivers/misc/sgi-gru/Makefile | 6 -
drivers/misc/sgi-gru/gru.h | 76 -
drivers/misc/sgi-gru/gru_instructions.h | 726 ----------
drivers/misc/sgi-gru/grufault.c | 903 ------------
drivers/misc/sgi-gru/grufile.c | 540 -------
drivers/misc/sgi-gru/gruhandles.c | 192 ---
drivers/misc/sgi-gru/gruhandles.h | 517 -------
drivers/misc/sgi-gru/grukdump.c | 223 ---
drivers/misc/sgi-gru/grukservices.c | 1157 ---------------
drivers/misc/sgi-gru/grukservices.h | 201 ---
drivers/misc/sgi-gru/grulib.h | 153 --
drivers/misc/sgi-gru/grumain.c | 969 -------------
drivers/misc/sgi-gru/gruprocfs.c | 308 ----
drivers/misc/sgi-gru/grutables.h | 659 ---------
drivers/misc/sgi-gru/grutlbpurge.c | 316 -----
drivers/misc/sgi-xp/Makefile | 13 -
drivers/misc/sgi-xp/xp.h | 341 -----
drivers/misc/sgi-xp/xp_main.c | 261 ----
drivers/misc/sgi-xp/xp_uv.c | 151 --
drivers/misc/sgi-xp/xpc.h | 732 ----------
drivers/misc/sgi-xp/xpc_channel.c | 1011 -------------
drivers/misc/sgi-xp/xpc_main.c | 1309 -----------------
drivers/misc/sgi-xp/xpc_partition.c | 545 -------
drivers/misc/sgi-xp/xpc_uv.c | 1728 -----------------------
drivers/misc/sgi-xp/xpnet.c | 599 --------
28 files changed, 13683 deletions(-)
delete mode 100644 drivers/misc/sgi-gru/Makefile
delete mode 100644 drivers/misc/sgi-gru/gru.h
delete mode 100644 drivers/misc/sgi-gru/gru_instructions.h
delete mode 100644 drivers/misc/sgi-gru/grufault.c
delete mode 100644 drivers/misc/sgi-gru/grufile.c
delete mode 100644 drivers/misc/sgi-gru/gruhandles.c
delete mode 100644 drivers/misc/sgi-gru/gruhandles.h
delete mode 100644 drivers/misc/sgi-gru/grukdump.c
delete mode 100644 drivers/misc/sgi-gru/grukservices.c
delete mode 100644 drivers/misc/sgi-gru/grukservices.h
delete mode 100644 drivers/misc/sgi-gru/grulib.h
delete mode 100644 drivers/misc/sgi-gru/grumain.c
delete mode 100644 drivers/misc/sgi-gru/gruprocfs.c
delete mode 100644 drivers/misc/sgi-gru/grutables.h
delete mode 100644 drivers/misc/sgi-gru/grutlbpurge.c
delete mode 100644 drivers/misc/sgi-xp/Makefile
delete mode 100644 drivers/misc/sgi-xp/xp.h
delete mode 100644 drivers/misc/sgi-xp/xp_main.c
delete mode 100644 drivers/misc/sgi-xp/xp_uv.c
delete mode 100644 drivers/misc/sgi-xp/xpc.h
delete mode 100644 drivers/misc/sgi-xp/xpc_channel.c
delete mode 100644 drivers/misc/sgi-xp/xpc_main.c
delete mode 100644 drivers/misc/sgi-xp/xpc_partition.c
delete mode 100644 drivers/misc/sgi-xp/xpc_uv.c
delete mode 100644 drivers/misc/sgi-xp/xpnet.c
--
2.43.0
^ permalink raw reply [flat|nested] 8+ messages in thread
* [PATCH 1/2] misc: sgi-xp: Remove SGI XP drivers
2026-07-31 14:26 [PATCH 0/2] Remove the sgi-gru and sgi-xp drivers Dimitri Sivanich
@ 2026-07-31 14:30 ` Dimitri Sivanich
2026-07-31 19:11 ` Robin Holt
2026-07-31 20:00 ` Steve Wahl
2026-07-31 14:37 ` [PATCH 2/2] misc: sgi-gru: Remove SGI GRU driver Dimitri Sivanich
1 sibling, 2 replies; 8+ messages in thread
From: Dimitri Sivanich @ 2026-07-31 14:30 UTC (permalink / raw)
To: Greg Kroah-Hartman
Cc: Steve Wahl, Anderson, Russ, Robin Holt, Arnd Bergmann, Kees Cook,
Russell King, Andrew Morton, David Hildenbrand (Arm),
Lorenzo Stoakes (Oracle), Muhammad Usama Anjum, netdev,
linux-kernel, Dimitri Sivanich
Working XP drivers require the GRU driver. The GRU driver is being
removed, so remove XP as well.
Signed-off-by: Dimitri Sivanich <sivanich@hpe.com>
---
MAINTAINERS | 6 -
drivers/misc/Kconfig | 13 -
drivers/misc/Makefile | 1 -
drivers/misc/sgi-xp/Makefile | 13 -
drivers/misc/sgi-xp/xp.h | 341 ------
drivers/misc/sgi-xp/xp_main.c | 261 ----
drivers/misc/sgi-xp/xp_uv.c | 151 ---
drivers/misc/sgi-xp/xpc.h | 732 ------------
drivers/misc/sgi-xp/xpc_channel.c | 1011 ----------------
drivers/misc/sgi-xp/xpc_main.c | 1309 --------------------
drivers/misc/sgi-xp/xpc_partition.c | 545 ---------
drivers/misc/sgi-xp/xpc_uv.c | 1728 ---------------------------
drivers/misc/sgi-xp/xpnet.c | 599 ----------
13 files changed, 6710 deletions(-)
delete mode 100644 drivers/misc/sgi-xp/Makefile
delete mode 100644 drivers/misc/sgi-xp/xp.h
delete mode 100644 drivers/misc/sgi-xp/xp_main.c
delete mode 100644 drivers/misc/sgi-xp/xp_uv.c
delete mode 100644 drivers/misc/sgi-xp/xpc.h
delete mode 100644 drivers/misc/sgi-xp/xpc_channel.c
delete mode 100644 drivers/misc/sgi-xp/xpc_main.c
delete mode 100644 drivers/misc/sgi-xp/xpc_partition.c
delete mode 100644 drivers/misc/sgi-xp/xpc_uv.c
delete mode 100644 drivers/misc/sgi-xp/xpnet.c
diff --git a/MAINTAINERS b/MAINTAINERS
index 62d53465ef9b..0267f5e3ce5e 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -24623,12 +24623,6 @@ M: Dimitri Sivanich <dimitri.sivanich@hpe.com>
S: Maintained
F: drivers/misc/sgi-gru/
-SGI XP/XPC/XPNET DRIVER
-M: Robin Holt <robinmholt@gmail.com>
-M: Steve Wahl <steve.wahl@hpe.com>
-S: Maintained
-F: drivers/misc/sgi-xp/
-
SHARED MEMORY COMMUNICATIONS (SMC) SOCKETS
M: D. Wythe <alibuda@linux.alibaba.com>
M: Dust Li <dust.li@linux.alibaba.com>
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index 390256ed91f4..18b09ca716ca 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -185,19 +185,6 @@ config ENCLOSURE_SERVICES
driver (SCSI/ATA) which supports enclosures
or a SCSI enclosure device (SES) to use these services.
-config SGI_XP
- tristate "Support communication between SGI SSIs"
- depends on NET
- depends on X86_UV && SMP
- depends on X86_64 || BROKEN
- select SGI_GRU if X86_64 && SMP
- help
- An SGI machine can be divided into multiple Single System
- Images which act independently of each other and have
- hardware based memory protection from the others. Enabling
- this feature will allow for direct communication between SSIs
- based on a network adapter and DMA messaging.
-
config SMPRO_ERRMON
tristate "Ampere Computing SMPro error monitor driver"
depends on MFD_SMPRO || COMPILE_TEST
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index fed47c7672b9..0e74b550b938 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -22,7 +22,6 @@ obj-$(CONFIG_QCOM_FASTRPC) += fastrpc.o
obj-$(CONFIG_SENSORS_BH1770) += bh1770glc.o
obj-$(CONFIG_ENCLOSURE_SERVICES) += enclosure.o
obj-$(CONFIG_KGDB_TESTS) += kgdbts.o
-obj-$(CONFIG_SGI_XP) += sgi-xp/
obj-$(CONFIG_SGI_GRU) += sgi-gru/
obj-$(CONFIG_SMPRO_ERRMON) += smpro-errmon.o
obj-$(CONFIG_SMPRO_MISC) += smpro-misc.o
diff --git a/drivers/misc/sgi-xp/Makefile b/drivers/misc/sgi-xp/Makefile
deleted file mode 100644
index 34c55a4045af..000000000000
--- a/drivers/misc/sgi-xp/Makefile
+++ /dev/null
@@ -1,13 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-#
-# Makefile for SGI's XP devices.
-#
-
-obj-$(CONFIG_SGI_XP) += xp.o
-xp-y := xp_main.o xp_uv.o
-
-obj-$(CONFIG_SGI_XP) += xpc.o
-xpc-y := xpc_main.o xpc_channel.o xpc_partition.o \
- xpc_uv.o
-
-obj-$(CONFIG_SGI_XP) += xpnet.o
diff --git a/drivers/misc/sgi-xp/xp.h b/drivers/misc/sgi-xp/xp.h
deleted file mode 100644
index 3185711beb07..000000000000
--- a/drivers/misc/sgi-xp/xp.h
+++ /dev/null
@@ -1,341 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * (C) Copyright 2020 Hewlett Packard Enterprise Development LP
- * Copyright (C) 2004-2008 Silicon Graphics, Inc. All rights reserved.
- */
-
-/*
- * External Cross Partition (XP) structures and defines.
- */
-
-#ifndef _DRIVERS_MISC_SGIXP_XP_H
-#define _DRIVERS_MISC_SGIXP_XP_H
-
-#include <linux/mutex.h>
-
-#if defined CONFIG_X86_UV
-#include <asm/uv/uv.h>
-#endif
-
-#ifdef USE_DBUG_ON
-#define DBUG_ON(condition) BUG_ON(condition)
-#else
-#define DBUG_ON(condition)
-#endif
-
-/*
- * Define the maximum number of partitions the system can possibly support.
- * It is based on the maximum number of hardware partitionable regions. The
- * term 'region' in this context refers to the minimum number of nodes that
- * can comprise an access protection grouping. The access protection is in
- * regards to memory, IPI and IOI.
- *
- * The maximum number of hardware partitionable regions is equal to the
- * maximum number of nodes in the entire system divided by the minimum number
- * of nodes that comprise an access protection grouping.
- */
-#define XP_MAX_NPARTITIONS_SN2 64
-#define XP_MAX_NPARTITIONS_UV 256
-
-/*
- * XPC establishes channel connections between the local partition and any
- * other partition that is currently up. Over these channels, kernel-level
- * `users' can communicate with their counterparts on the other partitions.
- *
- * If the need for additional channels arises, one can simply increase
- * XPC_MAX_NCHANNELS accordingly. If the day should come where that number
- * exceeds the absolute MAXIMUM number of channels possible (eight), then one
- * will need to make changes to the XPC code to accommodate for this.
- *
- * The absolute maximum number of channels possible is limited to eight for
- * performance reasons on sn2 hardware. The internal cross partition structures
- * require sixteen bytes per channel, and eight allows all of this
- * interface-shared info to fit in one 128-byte cacheline.
- */
-#define XPC_MEM_CHANNEL 0 /* memory channel number */
-#define XPC_NET_CHANNEL 1 /* network channel number */
-
-#define XPC_MAX_NCHANNELS 2 /* max #of channels allowed */
-
-#if XPC_MAX_NCHANNELS > 8
-#error XPC_MAX_NCHANNELS exceeds absolute MAXIMUM possible.
-#endif
-
-/*
- * Define macro, XPC_MSG_SIZE(), is provided for the user
- * that wants to fit as many msg entries as possible in a given memory size
- * (e.g. a memory page).
- */
-#define XPC_MSG_MAX_SIZE 128
-#define XPC_MSG_HDR_MAX_SIZE 16
-#define XPC_MSG_PAYLOAD_MAX_SIZE (XPC_MSG_MAX_SIZE - XPC_MSG_HDR_MAX_SIZE)
-
-#define XPC_MSG_SIZE(_payload_size) \
- ALIGN(XPC_MSG_HDR_MAX_SIZE + (_payload_size), \
- is_uv_system() ? 64 : 128)
-
-
-/*
- * Define the return values and values passed to user's callout functions.
- * (It is important to add new value codes at the end just preceding
- * xpUnknownReason, which must have the highest numerical value.)
- */
-enum xp_retval {
- xpSuccess = 0,
-
- xpNotConnected, /* 1: channel is not connected */
- xpConnected, /* 2: channel connected (opened) */
- xpRETIRED1, /* 3: (formerly xpDisconnected) */
-
- xpMsgReceived, /* 4: message received */
- xpMsgDelivered, /* 5: message delivered and acknowledged */
-
- xpRETIRED2, /* 6: (formerly xpTransferFailed) */
-
- xpNoWait, /* 7: operation would require wait */
- xpRetry, /* 8: retry operation */
- xpTimeout, /* 9: timeout in xpc_allocate_msg_wait() */
- xpInterrupted, /* 10: interrupted wait */
-
- xpUnequalMsgSizes, /* 11: message size disparity between sides */
- xpInvalidAddress, /* 12: invalid address */
-
- xpNoMemory, /* 13: no memory available for XPC structures */
- xpLackOfResources, /* 14: insufficient resources for operation */
- xpUnregistered, /* 15: channel is not registered */
- xpAlreadyRegistered, /* 16: channel is already registered */
-
- xpPartitionDown, /* 17: remote partition is down */
- xpNotLoaded, /* 18: XPC module is not loaded */
- xpUnloading, /* 19: this side is unloading XPC module */
-
- xpBadMagic, /* 20: XPC MAGIC string not found */
-
- xpReactivating, /* 21: remote partition was reactivated */
-
- xpUnregistering, /* 22: this side is unregistering channel */
- xpOtherUnregistering, /* 23: other side is unregistering channel */
-
- xpCloneKThread, /* 24: cloning kernel thread */
- xpCloneKThreadFailed, /* 25: cloning kernel thread failed */
-
- xpNoHeartbeat, /* 26: remote partition has no heartbeat */
-
- xpPioReadError, /* 27: PIO read error */
- xpPhysAddrRegFailed, /* 28: registration of phys addr range failed */
-
- xpRETIRED3, /* 29: (formerly xpBteDirectoryError) */
- xpRETIRED4, /* 30: (formerly xpBtePoisonError) */
- xpRETIRED5, /* 31: (formerly xpBteWriteError) */
- xpRETIRED6, /* 32: (formerly xpBteAccessError) */
- xpRETIRED7, /* 33: (formerly xpBtePWriteError) */
- xpRETIRED8, /* 34: (formerly xpBtePReadError) */
- xpRETIRED9, /* 35: (formerly xpBteTimeOutError) */
- xpRETIRED10, /* 36: (formerly xpBteXtalkError) */
- xpRETIRED11, /* 37: (formerly xpBteNotAvailable) */
- xpRETIRED12, /* 38: (formerly xpBteUnmappedError) */
-
- xpBadVersion, /* 39: bad version number */
- xpVarsNotSet, /* 40: the XPC variables are not set up */
- xpNoRsvdPageAddr, /* 41: unable to get rsvd page's phys addr */
- xpInvalidPartid, /* 42: invalid partition ID */
- xpLocalPartid, /* 43: local partition ID */
-
- xpOtherGoingDown, /* 44: other side going down, reason unknown */
- xpSystemGoingDown, /* 45: system is going down, reason unknown */
- xpSystemHalt, /* 46: system is being halted */
- xpSystemReboot, /* 47: system is being rebooted */
- xpSystemPoweroff, /* 48: system is being powered off */
-
- xpDisconnecting, /* 49: channel disconnecting (closing) */
-
- xpOpenCloseError, /* 50: channel open/close protocol error */
-
- xpDisconnected, /* 51: channel disconnected (closed) */
-
- xpBteCopyError, /* 52: bte_copy() returned error */
- xpSalError, /* 53: sn SAL error */
- xpRsvdPageNotSet, /* 54: the reserved page is not set up */
- xpPayloadTooBig, /* 55: payload too large for message slot */
-
- xpUnsupported, /* 56: unsupported functionality or resource */
- xpNeedMoreInfo, /* 57: more info is needed by SAL */
-
- xpGruCopyError, /* 58: gru_copy_gru() returned error */
- xpGruSendMqError, /* 59: gru send message queue related error */
-
- xpBadChannelNumber, /* 60: invalid channel number */
- xpBadMsgType, /* 61: invalid message type */
- xpBiosError, /* 62: BIOS error */
-
- xpUnknownReason /* 63: unknown reason - must be last in enum */
-};
-
-/*
- * Define the callout function type used by XPC to update the user on
- * connection activity and state changes via the user function registered
- * by xpc_connect().
- *
- * Arguments:
- *
- * reason - reason code.
- * partid - partition ID associated with condition.
- * ch_number - channel # associated with condition.
- * data - pointer to optional data.
- * key - pointer to optional user-defined value provided as the "key"
- * argument to xpc_connect().
- *
- * A reason code of xpConnected indicates that a connection has been
- * established to the specified partition on the specified channel. The data
- * argument indicates the max number of entries allowed in the message queue.
- *
- * A reason code of xpMsgReceived indicates that a XPC message arrived from
- * the specified partition on the specified channel. The data argument
- * specifies the address of the message's payload. The user must call
- * xpc_received() when finished with the payload.
- *
- * All other reason codes indicate failure. The data argmument is NULL.
- * When a failure reason code is received, one can assume that the channel
- * is not connected.
- */
-typedef void (*xpc_channel_func) (enum xp_retval reason, short partid,
- int ch_number, void *data, void *key);
-
-/*
- * Define the callout function type used by XPC to notify the user of
- * messages received and delivered via the user function registered by
- * xpc_send_notify().
- *
- * Arguments:
- *
- * reason - reason code.
- * partid - partition ID associated with condition.
- * ch_number - channel # associated with condition.
- * key - pointer to optional user-defined value provided as the "key"
- * argument to xpc_send_notify().
- *
- * A reason code of xpMsgDelivered indicates that the message was delivered
- * to the intended recipient and that they have acknowledged its receipt by
- * calling xpc_received().
- *
- * All other reason codes indicate failure.
- *
- * NOTE: The user defined function must be callable by an interrupt handler
- * and thus cannot block.
- */
-typedef void (*xpc_notify_func) (enum xp_retval reason, short partid,
- int ch_number, void *key);
-
-/*
- * The following is a registration entry. There is a global array of these,
- * one per channel. It is used to record the connection registration made
- * by the users of XPC. As long as a registration entry exists, for any
- * partition that comes up, XPC will attempt to establish a connection on
- * that channel. Notification that a connection has been made will occur via
- * the xpc_channel_func function.
- *
- * The 'func' field points to the function to call when aynchronous
- * notification is required for such events as: a connection established/lost,
- * or an incoming message received, or an error condition encountered. A
- * non-NULL 'func' field indicates that there is an active registration for
- * the channel.
- */
-struct xpc_registration {
- struct mutex mutex;
- xpc_channel_func func; /* function to call */
- void *key; /* pointer to user's key */
- u16 nentries; /* #of msg entries in local msg queue */
- u16 entry_size; /* message queue's message entry size */
- u32 assigned_limit; /* limit on #of assigned kthreads */
- u32 idle_limit; /* limit on #of idle kthreads */
-} ____cacheline_aligned;
-
-#define XPC_CHANNEL_REGISTERED(_c) (xpc_registrations[_c].func != NULL)
-
-/* the following are valid xpc_send() or xpc_send_notify() flags */
-#define XPC_WAIT 0 /* wait flag */
-#define XPC_NOWAIT 1 /* no wait flag */
-
-struct xpc_interface {
- void (*connect) (int);
- void (*disconnect) (int);
- enum xp_retval (*send) (short, int, u32, void *, u16);
- enum xp_retval (*send_notify) (short, int, u32, void *, u16,
- xpc_notify_func, void *);
- void (*received) (short, int, void *);
- enum xp_retval (*partid_to_nasids) (short, void *);
-};
-
-extern struct xpc_interface xpc_interface;
-
-extern void xpc_set_interface(void (*)(int),
- void (*)(int),
- enum xp_retval (*)(short, int, u32, void *, u16),
- enum xp_retval (*)(short, int, u32, void *, u16,
- xpc_notify_func, void *),
- void (*)(short, int, void *),
- enum xp_retval (*)(short, void *));
-extern void xpc_clear_interface(void);
-
-extern enum xp_retval xpc_connect(int, xpc_channel_func, void *, u16,
- u16, u32, u32);
-extern void xpc_disconnect(int);
-
-static inline enum xp_retval
-xpc_send(short partid, int ch_number, u32 flags, void *payload,
- u16 payload_size)
-{
- if (!xpc_interface.send)
- return xpNotLoaded;
-
- return xpc_interface.send(partid, ch_number, flags, payload,
- payload_size);
-}
-
-static inline enum xp_retval
-xpc_send_notify(short partid, int ch_number, u32 flags, void *payload,
- u16 payload_size, xpc_notify_func func, void *key)
-{
- if (!xpc_interface.send_notify)
- return xpNotLoaded;
-
- return xpc_interface.send_notify(partid, ch_number, flags, payload,
- payload_size, func, key);
-}
-
-static inline void
-xpc_received(short partid, int ch_number, void *payload)
-{
- if (xpc_interface.received)
- xpc_interface.received(partid, ch_number, payload);
-}
-
-static inline enum xp_retval
-xpc_partid_to_nasids(short partid, void *nasids)
-{
- if (!xpc_interface.partid_to_nasids)
- return xpNotLoaded;
-
- return xpc_interface.partid_to_nasids(partid, nasids);
-}
-
-extern short xp_max_npartitions;
-extern short xp_partition_id;
-extern u8 xp_region_size;
-
-extern unsigned long (*xp_pa) (void *);
-extern unsigned long (*xp_socket_pa) (unsigned long);
-extern enum xp_retval (*xp_remote_memcpy) (unsigned long, const unsigned long,
- size_t);
-extern int (*xp_cpu_to_nasid) (int);
-extern enum xp_retval (*xp_expand_memprotect) (unsigned long, unsigned long);
-extern enum xp_retval (*xp_restrict_memprotect) (unsigned long, unsigned long);
-
-extern struct device *xp;
-extern enum xp_retval xp_init_uv(void);
-extern void xp_exit_uv(void);
-
-#endif /* _DRIVERS_MISC_SGIXP_XP_H */
diff --git a/drivers/misc/sgi-xp/xp_main.c b/drivers/misc/sgi-xp/xp_main.c
deleted file mode 100644
index 87d156c15f35..000000000000
--- a/drivers/misc/sgi-xp/xp_main.c
+++ /dev/null
@@ -1,261 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * (C) Copyright 2020 Hewlett Packard Enterprise Development LP
- * Copyright (c) 2004-2008 Silicon Graphics, Inc. All Rights Reserved.
- */
-
-/*
- * Cross Partition (XP) base.
- *
- * XP provides a base from which its users can interact
- * with XPC, yet not be dependent on XPC.
- *
- */
-
-#include <linux/module.h>
-#include <linux/device.h>
-#include "xp.h"
-
-/* define the XP debug device structures to be used with dev_dbg() et al */
-
-static struct device_driver xp_dbg_name = {
- .name = "xp"
-};
-
-static struct device xp_dbg_subname = {
- .init_name = "", /* set to "" */
- .driver = &xp_dbg_name
-};
-
-struct device *xp = &xp_dbg_subname;
-
-/* max #of partitions possible */
-short xp_max_npartitions;
-EXPORT_SYMBOL_GPL(xp_max_npartitions);
-
-short xp_partition_id;
-EXPORT_SYMBOL_GPL(xp_partition_id);
-
-u8 xp_region_size;
-EXPORT_SYMBOL_GPL(xp_region_size);
-
-unsigned long (*xp_pa) (void *addr);
-EXPORT_SYMBOL_GPL(xp_pa);
-
-unsigned long (*xp_socket_pa) (unsigned long gpa);
-EXPORT_SYMBOL_GPL(xp_socket_pa);
-
-enum xp_retval (*xp_remote_memcpy) (unsigned long dst_gpa,
- const unsigned long src_gpa, size_t len);
-EXPORT_SYMBOL_GPL(xp_remote_memcpy);
-
-int (*xp_cpu_to_nasid) (int cpuid);
-EXPORT_SYMBOL_GPL(xp_cpu_to_nasid);
-
-enum xp_retval (*xp_expand_memprotect) (unsigned long phys_addr,
- unsigned long size);
-EXPORT_SYMBOL_GPL(xp_expand_memprotect);
-enum xp_retval (*xp_restrict_memprotect) (unsigned long phys_addr,
- unsigned long size);
-EXPORT_SYMBOL_GPL(xp_restrict_memprotect);
-
-/*
- * xpc_registrations[] keeps track of xpc_connect()'s done by the kernel-level
- * users of XPC.
- */
-struct xpc_registration xpc_registrations[XPC_MAX_NCHANNELS];
-EXPORT_SYMBOL_GPL(xpc_registrations);
-
-/*
- * Initialize the XPC interface to NULL to indicate that XPC isn't loaded.
- */
-struct xpc_interface xpc_interface = { };
-EXPORT_SYMBOL_GPL(xpc_interface);
-
-/*
- * XPC calls this when it (the XPC module) has been loaded.
- */
-void
-xpc_set_interface(void (*connect) (int),
- void (*disconnect) (int),
- enum xp_retval (*send) (short, int, u32, void *, u16),
- enum xp_retval (*send_notify) (short, int, u32, void *, u16,
- xpc_notify_func, void *),
- void (*received) (short, int, void *),
- enum xp_retval (*partid_to_nasids) (short, void *))
-{
- xpc_interface.connect = connect;
- xpc_interface.disconnect = disconnect;
- xpc_interface.send = send;
- xpc_interface.send_notify = send_notify;
- xpc_interface.received = received;
- xpc_interface.partid_to_nasids = partid_to_nasids;
-}
-EXPORT_SYMBOL_GPL(xpc_set_interface);
-
-/*
- * XPC calls this when it (the XPC module) is being unloaded.
- */
-void
-xpc_clear_interface(void)
-{
- memset(&xpc_interface, 0, sizeof(xpc_interface));
-}
-EXPORT_SYMBOL_GPL(xpc_clear_interface);
-
-/*
- * Register for automatic establishment of a channel connection whenever
- * a partition comes up.
- *
- * Arguments:
- *
- * ch_number - channel # to register for connection.
- * func - function to call for asynchronous notification of channel
- * state changes (i.e., connection, disconnection, error) and
- * the arrival of incoming messages.
- * key - pointer to optional user-defined value that gets passed back
- * to the user on any callouts made to func.
- * payload_size - size in bytes of the XPC message's payload area which
- * contains a user-defined message. The user should make
- * this large enough to hold their largest message.
- * nentries - max #of XPC message entries a message queue can contain.
- * The actual number, which is determined when a connection
- * is established and may be less then requested, will be
- * passed to the user via the xpConnected callout.
- * assigned_limit - max number of kthreads allowed to be processing
- * messages (per connection) at any given instant.
- * idle_limit - max number of kthreads allowed to be idle at any given
- * instant.
- */
-enum xp_retval
-xpc_connect(int ch_number, xpc_channel_func func, void *key, u16 payload_size,
- u16 nentries, u32 assigned_limit, u32 idle_limit)
-{
- struct xpc_registration *registration;
-
- DBUG_ON(ch_number < 0 || ch_number >= XPC_MAX_NCHANNELS);
- DBUG_ON(payload_size == 0 || nentries == 0);
- DBUG_ON(func == NULL);
- DBUG_ON(assigned_limit == 0 || idle_limit > assigned_limit);
-
- if (XPC_MSG_SIZE(payload_size) > XPC_MSG_MAX_SIZE)
- return xpPayloadTooBig;
-
- registration = &xpc_registrations[ch_number];
-
- if (mutex_lock_interruptible(®istration->mutex) != 0)
- return xpInterrupted;
-
- /* if XPC_CHANNEL_REGISTERED(ch_number) */
- if (registration->func != NULL) {
- mutex_unlock(®istration->mutex);
- return xpAlreadyRegistered;
- }
-
- /* register the channel for connection */
- registration->entry_size = XPC_MSG_SIZE(payload_size);
- registration->nentries = nentries;
- registration->assigned_limit = assigned_limit;
- registration->idle_limit = idle_limit;
- registration->key = key;
- registration->func = func;
-
- mutex_unlock(®istration->mutex);
-
- if (xpc_interface.connect)
- xpc_interface.connect(ch_number);
-
- return xpSuccess;
-}
-EXPORT_SYMBOL_GPL(xpc_connect);
-
-/*
- * Remove the registration for automatic connection of the specified channel
- * when a partition comes up.
- *
- * Before returning this xpc_disconnect() will wait for all connections on the
- * specified channel have been closed/torndown. So the caller can be assured
- * that they will not be receiving any more callouts from XPC to their
- * function registered via xpc_connect().
- *
- * Arguments:
- *
- * ch_number - channel # to unregister.
- */
-void
-xpc_disconnect(int ch_number)
-{
- struct xpc_registration *registration;
-
- DBUG_ON(ch_number < 0 || ch_number >= XPC_MAX_NCHANNELS);
-
- registration = &xpc_registrations[ch_number];
-
- /*
- * We've decided not to make this a down_interruptible(), since we
- * figured XPC's users will just turn around and call xpc_disconnect()
- * again anyways, so we might as well wait, if need be.
- */
- mutex_lock(®istration->mutex);
-
- /* if !XPC_CHANNEL_REGISTERED(ch_number) */
- if (registration->func == NULL) {
- mutex_unlock(®istration->mutex);
- return;
- }
-
- /* remove the connection registration for the specified channel */
- registration->func = NULL;
- registration->key = NULL;
- registration->nentries = 0;
- registration->entry_size = 0;
- registration->assigned_limit = 0;
- registration->idle_limit = 0;
-
- if (xpc_interface.disconnect)
- xpc_interface.disconnect(ch_number);
-
- mutex_unlock(®istration->mutex);
-
- return;
-}
-EXPORT_SYMBOL_GPL(xpc_disconnect);
-
-static int __init
-xp_init(void)
-{
- enum xp_retval ret;
- int ch_number;
-
- /* initialize the connection registration mutex */
- for (ch_number = 0; ch_number < XPC_MAX_NCHANNELS; ch_number++)
- mutex_init(&xpc_registrations[ch_number].mutex);
-
- if (is_uv_system())
- ret = xp_init_uv();
- else
- ret = 0;
-
- if (ret != xpSuccess)
- return ret;
-
- return 0;
-}
-
-module_init(xp_init);
-
-static void __exit
-xp_exit(void)
-{
- if (is_uv_system())
- xp_exit_uv();
-}
-
-module_exit(xp_exit);
-
-MODULE_AUTHOR("Silicon Graphics, Inc.");
-MODULE_DESCRIPTION("Cross Partition (XP) base");
-MODULE_LICENSE("GPL");
diff --git a/drivers/misc/sgi-xp/xp_uv.c b/drivers/misc/sgi-xp/xp_uv.c
deleted file mode 100644
index 3faa7eadf679..000000000000
--- a/drivers/misc/sgi-xp/xp_uv.c
+++ /dev/null
@@ -1,151 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * (C) Copyright 2020 Hewlett Packard Enterprise Development LP
- * Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
- */
-
-/*
- * Cross Partition (XP) uv-based functions.
- *
- * Architecture specific implementation of common functions.
- *
- */
-
-#include <linux/device.h>
-#include <asm/uv/uv_hub.h>
-#if defined CONFIG_X86_64
-#include <asm/uv/bios.h>
-#endif
-#include "../sgi-gru/grukservices.h"
-#include "xp.h"
-
-/*
- * Convert a virtual memory address to a physical memory address.
- */
-static unsigned long
-xp_pa_uv(void *addr)
-{
- return uv_gpa(addr);
-}
-
-/*
- * Convert a global physical to socket physical address.
- */
-static unsigned long
-xp_socket_pa_uv(unsigned long gpa)
-{
- return uv_gpa_to_soc_phys_ram(gpa);
-}
-
-static enum xp_retval
-xp_remote_mmr_read(unsigned long dst_gpa, const unsigned long src_gpa,
- size_t len)
-{
- int ret;
- unsigned long *dst_va = __va(uv_gpa_to_soc_phys_ram(dst_gpa));
-
- BUG_ON(!uv_gpa_in_mmr_space(src_gpa));
- BUG_ON(len != 8);
-
- ret = gru_read_gpa(dst_va, src_gpa);
- if (ret == 0)
- return xpSuccess;
-
- dev_err(xp, "gru_read_gpa() failed, dst_gpa=0x%016lx src_gpa=0x%016lx "
- "len=%ld\n", dst_gpa, src_gpa, len);
- return xpGruCopyError;
-}
-
-
-static enum xp_retval
-xp_remote_memcpy_uv(unsigned long dst_gpa, const unsigned long src_gpa,
- size_t len)
-{
- int ret;
-
- if (uv_gpa_in_mmr_space(src_gpa))
- return xp_remote_mmr_read(dst_gpa, src_gpa, len);
-
- ret = gru_copy_gpa(dst_gpa, src_gpa, len);
- if (ret == 0)
- return xpSuccess;
-
- dev_err(xp, "gru_copy_gpa() failed, dst_gpa=0x%016lx src_gpa=0x%016lx "
- "len=%ld\n", dst_gpa, src_gpa, len);
- return xpGruCopyError;
-}
-
-static int
-xp_cpu_to_nasid_uv(int cpuid)
-{
- /* ??? Is this same as sn2 nasid in mach/part bitmaps set up by SAL? */
- return UV_PNODE_TO_NASID(uv_cpu_to_pnode(cpuid));
-}
-
-static enum xp_retval
-xp_expand_memprotect_uv(unsigned long phys_addr, unsigned long size)
-{
- int ret;
-
-#if defined CONFIG_X86_64
- ret = uv_bios_change_memprotect(phys_addr, size, UV_MEMPROT_ALLOW_RW);
- if (ret != BIOS_STATUS_SUCCESS) {
- dev_err(xp, "uv_bios_change_memprotect(,, "
- "UV_MEMPROT_ALLOW_RW) failed, ret=%d\n", ret);
- return xpBiosError;
- }
-#else
- #error not a supported configuration
-#endif
- return xpSuccess;
-}
-
-static enum xp_retval
-xp_restrict_memprotect_uv(unsigned long phys_addr, unsigned long size)
-{
- int ret;
-
-#if defined CONFIG_X86_64
- ret = uv_bios_change_memprotect(phys_addr, size,
- UV_MEMPROT_RESTRICT_ACCESS);
- if (ret != BIOS_STATUS_SUCCESS) {
- dev_err(xp, "uv_bios_change_memprotect(,, "
- "UV_MEMPROT_RESTRICT_ACCESS) failed, ret=%d\n", ret);
- return xpBiosError;
- }
-#else
- #error not a supported configuration
-#endif
- return xpSuccess;
-}
-
-enum xp_retval
-xp_init_uv(void)
-{
- WARN_ON(!is_uv_system());
- if (!is_uv_system())
- return xpUnsupported;
-
- xp_max_npartitions = XP_MAX_NPARTITIONS_UV;
-#ifdef CONFIG_X86
- xp_partition_id = sn_partition_id;
- xp_region_size = sn_region_size;
-#endif
- xp_pa = xp_pa_uv;
- xp_socket_pa = xp_socket_pa_uv;
- xp_remote_memcpy = xp_remote_memcpy_uv;
- xp_cpu_to_nasid = xp_cpu_to_nasid_uv;
- xp_expand_memprotect = xp_expand_memprotect_uv;
- xp_restrict_memprotect = xp_restrict_memprotect_uv;
-
- return xpSuccess;
-}
-
-void
-xp_exit_uv(void)
-{
- WARN_ON(!is_uv_system());
-}
diff --git a/drivers/misc/sgi-xp/xpc.h b/drivers/misc/sgi-xp/xpc.h
deleted file mode 100644
index 225f2bb84e39..000000000000
--- a/drivers/misc/sgi-xp/xpc.h
+++ /dev/null
@@ -1,732 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (c) 2004-2009 Silicon Graphics, Inc. All Rights Reserved.
- */
-
-/*
- * Cross Partition Communication (XPC) structures and macros.
- */
-
-#ifndef _DRIVERS_MISC_SGIXP_XPC_H
-#define _DRIVERS_MISC_SGIXP_XPC_H
-
-#include <linux/wait.h>
-#include <linux/completion.h>
-#include <linux/timer.h>
-#include <linux/sched.h>
-#include "xp.h"
-
-/*
- * XPC Version numbers consist of a major and minor number. XPC can always
- * talk to versions with same major #, and never talk to versions with a
- * different major #.
- */
-#define _XPC_VERSION(_maj, _min) (((_maj) << 4) | ((_min) & 0xf))
-#define XPC_VERSION_MAJOR(_v) ((_v) >> 4)
-#define XPC_VERSION_MINOR(_v) ((_v) & 0xf)
-
-/* define frequency of the heartbeat and frequency how often it's checked */
-#define XPC_HB_DEFAULT_INTERVAL 5 /* incr HB every x secs */
-#define XPC_HB_CHECK_DEFAULT_INTERVAL 20 /* check HB every x secs */
-
-/* define the process name of HB checker and the CPU it is pinned to */
-#define XPC_HB_CHECK_THREAD_NAME "xpc_hb"
-#define XPC_HB_CHECK_CPU 0
-
-/* define the process name of the discovery thread */
-#define XPC_DISCOVERY_THREAD_NAME "xpc_discovery"
-
-/*
- * the reserved page
- *
- * SAL reserves one page of memory per partition for XPC. Though a full page
- * in length (16384 bytes), its starting address is not page aligned, but it
- * is cacheline aligned. The reserved page consists of the following:
- *
- * reserved page header
- *
- * The first two 64-byte cachelines of the reserved page contain the
- * header (struct xpc_rsvd_page). Before SAL initialization has completed,
- * SAL has set up the following fields of the reserved page header:
- * SAL_signature, SAL_version, SAL_partid, and SAL_nasids_size. The
- * other fields are set up by XPC. (xpc_rsvd_page points to the local
- * partition's reserved page.)
- *
- * part_nasids mask
- * mach_nasids mask
- *
- * SAL also sets up two bitmaps (or masks), one that reflects the actual
- * nasids in this partition (part_nasids), and the other that reflects
- * the actual nasids in the entire machine (mach_nasids). We're only
- * interested in the even numbered nasids (which contain the processors
- * and/or memory), so we only need half as many bits to represent the
- * nasids. When mapping nasid to bit in a mask (or bit to nasid) be sure
- * to either divide or multiply by 2. The part_nasids mask is located
- * starting at the first cacheline following the reserved page header. The
- * mach_nasids mask follows right after the part_nasids mask. The size in
- * bytes of each mask is reflected by the reserved page header field
- * 'SAL_nasids_size'. (Local partition's mask pointers are xpc_part_nasids
- * and xpc_mach_nasids.)
- *
- * Immediately following the mach_nasids mask are the XPC variables
- * required by other partitions. First are those that are generic to all
- * partitions (vars), followed on the next available cacheline by those
- * which are partition specific (vars part). These are setup by XPC.
- *
- * Note: Until 'ts_jiffies' is set non-zero, the partition XPC code has not been
- * initialized.
- */
-struct xpc_rsvd_page {
- u64 SAL_signature; /* SAL: unique signature */
- u64 SAL_version; /* SAL: version */
- short SAL_partid; /* SAL: partition ID */
- short max_npartitions; /* value of XPC_MAX_PARTITIONS */
- u8 version;
- u8 pad1[3]; /* align to next u64 in 1st 64-byte cacheline */
- unsigned long ts_jiffies; /* timestamp when rsvd pg was setup by XPC */
- union {
- struct {
- unsigned long heartbeat_gpa; /* phys addr */
- unsigned long activate_gru_mq_desc_gpa; /* phys addr */
- } uv;
- } sn;
- u64 pad2[9]; /* align to last u64 in 2nd 64-byte cacheline */
- u64 SAL_nasids_size; /* SAL: size of each nasid mask in bytes */
-};
-
-#define XPC_RP_VERSION _XPC_VERSION(3, 0) /* version 3.0 of the reserved page */
-
-/* the reserved page sizes and offsets */
-
-#define XPC_RP_HEADER_SIZE L1_CACHE_ALIGN(sizeof(struct xpc_rsvd_page))
-
-#define XPC_RP_PART_NASIDS(_rp) ((unsigned long *)((u8 *)(_rp) + \
- XPC_RP_HEADER_SIZE))
-#define XPC_RP_MACH_NASIDS(_rp) (XPC_RP_PART_NASIDS(_rp) + \
- xpc_nasid_mask_nlongs)
-
-
-/*
- * The following structure describes the partition's heartbeat info which
- * will be periodically read by other partitions to determine whether this
- * XPC is still 'alive'.
- */
-struct xpc_heartbeat_uv {
- unsigned long value;
- unsigned long offline; /* if 0, heartbeat should be changing */
-};
-
-/*
- * Info pertinent to a GRU message queue using a watch list for irq generation.
- */
-struct xpc_gru_mq_uv {
- void *address; /* address of GRU message queue */
- unsigned int order; /* size of GRU message queue as a power of 2 */
- int irq; /* irq raised when message is received in mq */
- int mmr_blade; /* blade where watchlist was allocated from */
- unsigned long mmr_offset; /* offset of irq mmr located on mmr_blade */
- unsigned long mmr_value; /* value of irq mmr located on mmr_blade */
- int watchlist_num; /* number of watchlist allocatd by BIOS */
- void *gru_mq_desc; /* opaque structure used by the GRU driver */
-};
-
-/*
- * The activate_mq is used to send/receive GRU messages that affect XPC's
- * partition active state and channel state. This is uv only.
- */
-struct xpc_activate_mq_msghdr_uv {
- unsigned int gru_msg_hdr; /* FOR GRU INTERNAL USE ONLY */
- short partid; /* sender's partid */
- u8 act_state; /* sender's act_state at time msg sent */
- u8 type; /* message's type */
- unsigned long rp_ts_jiffies; /* timestamp of sender's rp setup by XPC */
-};
-
-/* activate_mq defined message types */
-#define XPC_ACTIVATE_MQ_MSG_SYNC_ACT_STATE_UV 0
-
-#define XPC_ACTIVATE_MQ_MSG_ACTIVATE_REQ_UV 1
-#define XPC_ACTIVATE_MQ_MSG_DEACTIVATE_REQ_UV 2
-
-#define XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREQUEST_UV 3
-#define XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREPLY_UV 4
-#define XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREQUEST_UV 5
-#define XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREPLY_UV 6
-#define XPC_ACTIVATE_MQ_MSG_CHCTL_OPENCOMPLETE_UV 7
-
-#define XPC_ACTIVATE_MQ_MSG_MARK_ENGAGED_UV 8
-#define XPC_ACTIVATE_MQ_MSG_MARK_DISENGAGED_UV 9
-
-struct xpc_activate_mq_msg_uv {
- struct xpc_activate_mq_msghdr_uv hdr;
-};
-
-struct xpc_activate_mq_msg_activate_req_uv {
- struct xpc_activate_mq_msghdr_uv hdr;
- unsigned long rp_gpa;
- unsigned long heartbeat_gpa;
- unsigned long activate_gru_mq_desc_gpa;
-};
-
-struct xpc_activate_mq_msg_deactivate_req_uv {
- struct xpc_activate_mq_msghdr_uv hdr;
- enum xp_retval reason;
-};
-
-struct xpc_activate_mq_msg_chctl_closerequest_uv {
- struct xpc_activate_mq_msghdr_uv hdr;
- short ch_number;
- enum xp_retval reason;
-};
-
-struct xpc_activate_mq_msg_chctl_closereply_uv {
- struct xpc_activate_mq_msghdr_uv hdr;
- short ch_number;
-};
-
-struct xpc_activate_mq_msg_chctl_openrequest_uv {
- struct xpc_activate_mq_msghdr_uv hdr;
- short ch_number;
- short entry_size; /* size of notify_mq's GRU messages */
- short local_nentries; /* ??? Is this needed? What is? */
-};
-
-struct xpc_activate_mq_msg_chctl_openreply_uv {
- struct xpc_activate_mq_msghdr_uv hdr;
- short ch_number;
- short remote_nentries; /* ??? Is this needed? What is? */
- short local_nentries; /* ??? Is this needed? What is? */
- unsigned long notify_gru_mq_desc_gpa;
-};
-
-struct xpc_activate_mq_msg_chctl_opencomplete_uv {
- struct xpc_activate_mq_msghdr_uv hdr;
- short ch_number;
-};
-
-/*
- * Functions registered by add_timer() or called by kernel_thread() only
- * allow for a single 64-bit argument. The following macros can be used to
- * pack and unpack two (32-bit, 16-bit or 8-bit) arguments into or out from
- * the passed argument.
- */
-#define XPC_PACK_ARGS(_arg1, _arg2) \
- ((((u64)_arg1) & 0xffffffff) | \
- ((((u64)_arg2) & 0xffffffff) << 32))
-
-#define XPC_UNPACK_ARG1(_args) (((u64)_args) & 0xffffffff)
-#define XPC_UNPACK_ARG2(_args) ((((u64)_args) >> 32) & 0xffffffff)
-
-/*
- * Define a structure that contains arguments associated with opening and
- * closing a channel.
- */
-struct xpc_openclose_args {
- u16 reason; /* reason why channel is closing */
- u16 entry_size; /* sizeof each message entry */
- u16 remote_nentries; /* #of message entries in remote msg queue */
- u16 local_nentries; /* #of message entries in local msg queue */
- unsigned long local_msgqueue_pa; /* phys addr of local message queue */
-};
-
-#define XPC_OPENCLOSE_ARGS_SIZE \
- L1_CACHE_ALIGN(sizeof(struct xpc_openclose_args) * \
- XPC_MAX_NCHANNELS)
-
-
-/*
- * Structures to define a fifo singly-linked list.
- */
-
-struct xpc_fifo_entry_uv {
- struct xpc_fifo_entry_uv *next;
-};
-
-struct xpc_fifo_head_uv {
- struct xpc_fifo_entry_uv *first;
- struct xpc_fifo_entry_uv *last;
- spinlock_t lock;
- int n_entries;
-};
-
-/*
- * The format of a uv XPC notify_mq GRU message is as follows:
- *
- * A user-defined message resides in the payload area. The max size of the
- * payload is defined by the user via xpc_connect().
- *
- * The size of a message (payload and header) sent via the GRU must be either 1
- * or 2 GRU_CACHE_LINE_BYTES in length.
- */
-
-struct xpc_notify_mq_msghdr_uv {
- union {
- unsigned int gru_msg_hdr; /* FOR GRU INTERNAL USE ONLY */
- struct xpc_fifo_entry_uv next; /* FOR XPC INTERNAL USE ONLY */
- } u;
- short partid; /* FOR XPC INTERNAL USE ONLY */
- u8 ch_number; /* FOR XPC INTERNAL USE ONLY */
- u8 size; /* FOR XPC INTERNAL USE ONLY */
- unsigned int msg_slot_number; /* FOR XPC INTERNAL USE ONLY */
-};
-
-struct xpc_notify_mq_msg_uv {
- struct xpc_notify_mq_msghdr_uv hdr;
- unsigned long payload;
-};
-
-/* struct xpc_notify_sn2 type of notification */
-
-#define XPC_N_CALL 0x01 /* notify function provided by user */
-
-/*
- * Define uv's version of the notify entry. It additionally is used to allocate
- * a msg slot on the remote partition into which is copied a sent message.
- */
-struct xpc_send_msg_slot_uv {
- struct xpc_fifo_entry_uv next;
- unsigned int msg_slot_number;
- xpc_notify_func func; /* user's notify function */
- void *key; /* pointer to user's key */
-};
-
-/*
- * Define the structure that manages all the stuff required by a channel. In
- * particular, they are used to manage the messages sent across the channel.
- *
- * This structure is private to a partition, and is NOT shared across the
- * partition boundary.
- *
- * There is an array of these structures for each remote partition. It is
- * allocated at the time a partition becomes active. The array contains one
- * of these structures for each potential channel connection to that partition.
- */
-
-struct xpc_channel_uv {
- void *cached_notify_gru_mq_desc; /* remote partition's notify mq's */
- /* gru mq descriptor */
-
- struct xpc_send_msg_slot_uv *send_msg_slots;
- void *recv_msg_slots; /* each slot will hold a xpc_notify_mq_msg_uv */
- /* structure plus the user's payload */
-
- struct xpc_fifo_head_uv msg_slot_free_list;
- struct xpc_fifo_head_uv recv_msg_list; /* deliverable payloads */
-};
-
-struct xpc_channel {
- short partid; /* ID of remote partition connected */
- spinlock_t lock; /* lock for updating this structure */
- unsigned int flags; /* general flags */
-
- enum xp_retval reason; /* reason why channel is disconnect'g */
- int reason_line; /* line# disconnect initiated from */
-
- u16 number; /* channel # */
-
- u16 entry_size; /* sizeof each msg entry */
- u16 local_nentries; /* #of msg entries in local msg queue */
- u16 remote_nentries; /* #of msg entries in remote msg queue */
-
- atomic_t references; /* #of external references to queues */
-
- atomic_t n_on_msg_allocate_wq; /* #on msg allocation wait queue */
- wait_queue_head_t msg_allocate_wq; /* msg allocation wait queue */
-
- u8 delayed_chctl_flags; /* chctl flags received, but delayed */
- /* action until channel disconnected */
-
- atomic_t n_to_notify; /* #of msg senders to notify */
-
- xpc_channel_func func; /* user's channel function */
- void *key; /* pointer to user's key */
-
- struct completion wdisconnect_wait; /* wait for channel disconnect */
-
- /* kthread management related fields */
-
- atomic_t kthreads_assigned; /* #of kthreads assigned to channel */
- u32 kthreads_assigned_limit; /* limit on #of kthreads assigned */
- atomic_t kthreads_idle; /* #of kthreads idle waiting for work */
- u32 kthreads_idle_limit; /* limit on #of kthreads idle */
- atomic_t kthreads_active; /* #of kthreads actively working */
-
- wait_queue_head_t idle_wq; /* idle kthread wait queue */
-
- union {
- struct xpc_channel_uv uv;
- } sn;
-
-} ____cacheline_aligned;
-
-/* struct xpc_channel flags */
-
-#define XPC_C_WASCONNECTED 0x00000001 /* channel was connected */
-
-#define XPC_C_ROPENCOMPLETE 0x00000002 /* remote open channel complete */
-#define XPC_C_OPENCOMPLETE 0x00000004 /* local open channel complete */
-#define XPC_C_ROPENREPLY 0x00000008 /* remote open channel reply */
-#define XPC_C_OPENREPLY 0x00000010 /* local open channel reply */
-#define XPC_C_ROPENREQUEST 0x00000020 /* remote open channel request */
-#define XPC_C_OPENREQUEST 0x00000040 /* local open channel request */
-
-#define XPC_C_SETUP 0x00000080 /* channel's msgqueues are alloc'd */
-#define XPC_C_CONNECTEDCALLOUT 0x00000100 /* connected callout initiated */
-#define XPC_C_CONNECTEDCALLOUT_MADE \
- 0x00000200 /* connected callout completed */
-#define XPC_C_CONNECTED 0x00000400 /* local channel is connected */
-#define XPC_C_CONNECTING 0x00000800 /* channel is being connected */
-
-#define XPC_C_RCLOSEREPLY 0x00001000 /* remote close channel reply */
-#define XPC_C_CLOSEREPLY 0x00002000 /* local close channel reply */
-#define XPC_C_RCLOSEREQUEST 0x00004000 /* remote close channel request */
-#define XPC_C_CLOSEREQUEST 0x00008000 /* local close channel request */
-
-#define XPC_C_DISCONNECTED 0x00010000 /* channel is disconnected */
-#define XPC_C_DISCONNECTING 0x00020000 /* channel is being disconnected */
-#define XPC_C_DISCONNECTINGCALLOUT \
- 0x00040000 /* disconnecting callout initiated */
-#define XPC_C_DISCONNECTINGCALLOUT_MADE \
- 0x00080000 /* disconnecting callout completed */
-#define XPC_C_WDISCONNECT 0x00100000 /* waiting for channel disconnect */
-
-/*
- * The channel control flags (chctl) union consists of a 64-bit variable which
- * is divided up into eight bytes, ordered from right to left. Byte zero
- * pertains to channel 0, byte one to channel 1, and so on. Each channel's byte
- * can have one or more of the chctl flags set in it.
- */
-
-union xpc_channel_ctl_flags {
- u64 all_flags;
- u8 flags[XPC_MAX_NCHANNELS];
-};
-
-/* chctl flags */
-#define XPC_CHCTL_CLOSEREQUEST 0x01
-#define XPC_CHCTL_CLOSEREPLY 0x02
-#define XPC_CHCTL_OPENREQUEST 0x04
-#define XPC_CHCTL_OPENREPLY 0x08
-#define XPC_CHCTL_OPENCOMPLETE 0x10
-#define XPC_CHCTL_MSGREQUEST 0x20
-
-#define XPC_OPENCLOSE_CHCTL_FLAGS \
- (XPC_CHCTL_CLOSEREQUEST | XPC_CHCTL_CLOSEREPLY | \
- XPC_CHCTL_OPENREQUEST | XPC_CHCTL_OPENREPLY | \
- XPC_CHCTL_OPENCOMPLETE)
-#define XPC_MSG_CHCTL_FLAGS XPC_CHCTL_MSGREQUEST
-
-static inline int
-xpc_any_openclose_chctl_flags_set(union xpc_channel_ctl_flags *chctl)
-{
- int ch_number;
-
- for (ch_number = 0; ch_number < XPC_MAX_NCHANNELS; ch_number++) {
- if (chctl->flags[ch_number] & XPC_OPENCLOSE_CHCTL_FLAGS)
- return 1;
- }
- return 0;
-}
-
-static inline int
-xpc_any_msg_chctl_flags_set(union xpc_channel_ctl_flags *chctl)
-{
- int ch_number;
-
- for (ch_number = 0; ch_number < XPC_MAX_NCHANNELS; ch_number++) {
- if (chctl->flags[ch_number] & XPC_MSG_CHCTL_FLAGS)
- return 1;
- }
- return 0;
-}
-
-struct xpc_partition_uv {
- unsigned long heartbeat_gpa; /* phys addr of partition's heartbeat */
- struct xpc_heartbeat_uv cached_heartbeat; /* cached copy of */
- /* partition's heartbeat */
- unsigned long activate_gru_mq_desc_gpa; /* phys addr of parititon's */
- /* activate mq's gru mq */
- /* descriptor */
- void *cached_activate_gru_mq_desc; /* cached copy of partition's */
- /* activate mq's gru mq descriptor */
- struct mutex cached_activate_gru_mq_desc_mutex;
- spinlock_t flags_lock; /* protect updating of flags */
- unsigned int flags; /* general flags */
- u8 remote_act_state; /* remote partition's act_state */
- u8 act_state_req; /* act_state request from remote partition */
- enum xp_retval reason; /* reason for deactivate act_state request */
-};
-
-/* struct xpc_partition_uv flags */
-
-#define XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV 0x00000001
-#define XPC_P_ENGAGED_UV 0x00000002
-
-/* struct xpc_partition_uv act_state change requests */
-
-#define XPC_P_ASR_ACTIVATE_UV 0x01
-#define XPC_P_ASR_REACTIVATE_UV 0x02
-#define XPC_P_ASR_DEACTIVATE_UV 0x03
-
-struct xpc_partition {
-
- /* XPC HB infrastructure */
-
- u8 remote_rp_version; /* version# of partition's rsvd pg */
- unsigned long remote_rp_ts_jiffies; /* timestamp when rsvd pg setup */
- unsigned long remote_rp_pa; /* phys addr of partition's rsvd pg */
- u64 last_heartbeat; /* HB at last read */
- u32 activate_IRQ_rcvd; /* IRQs since activation */
- spinlock_t act_lock; /* protect updating of act_state */
- u8 act_state; /* from XPC HB viewpoint */
- enum xp_retval reason; /* reason partition is deactivating */
- int reason_line; /* line# deactivation initiated from */
-
- unsigned long disengage_timeout; /* timeout in jiffies */
- struct timer_list disengage_timer;
-
- /* XPC infrastructure referencing and teardown control */
-
- u8 setup_state; /* infrastructure setup state */
- wait_queue_head_t teardown_wq; /* kthread waiting to teardown infra */
- atomic_t references; /* #of references to infrastructure */
-
- u8 nchannels; /* #of defined channels supported */
- atomic_t nchannels_active; /* #of channels that are not DISCONNECTED */
- atomic_t nchannels_engaged; /* #of channels engaged with remote part */
- struct xpc_channel *channels; /* array of channel structures */
-
- /* fields used for managing channel avialability and activity */
-
- union xpc_channel_ctl_flags chctl; /* chctl flags yet to be processed */
- spinlock_t chctl_lock; /* chctl flags lock */
-
- void *remote_openclose_args_base; /* base address of kmalloc'd space */
- struct xpc_openclose_args *remote_openclose_args; /* copy of remote's */
- /* args */
-
- /* channel manager related fields */
-
- atomic_t channel_mgr_requests; /* #of requests to activate chan mgr */
- wait_queue_head_t channel_mgr_wq; /* channel mgr's wait queue */
-
- union {
- struct xpc_partition_uv uv;
- } sn;
-
-} ____cacheline_aligned;
-
-struct xpc_arch_operations {
- int (*setup_partitions) (void);
- void (*teardown_partitions) (void);
- void (*process_activate_IRQ_rcvd) (void);
- enum xp_retval (*get_partition_rsvd_page_pa)
- (void *, u64 *, unsigned long *, size_t *);
- int (*setup_rsvd_page) (struct xpc_rsvd_page *);
-
- void (*allow_hb) (short);
- void (*disallow_hb) (short);
- void (*disallow_all_hbs) (void);
- void (*increment_heartbeat) (void);
- void (*offline_heartbeat) (void);
- void (*online_heartbeat) (void);
- void (*heartbeat_init) (void);
- void (*heartbeat_exit) (void);
- enum xp_retval (*get_remote_heartbeat) (struct xpc_partition *);
-
- void (*request_partition_activation) (struct xpc_rsvd_page *,
- unsigned long, int);
- void (*request_partition_reactivation) (struct xpc_partition *);
- void (*request_partition_deactivation) (struct xpc_partition *);
- void (*cancel_partition_deactivation_request) (struct xpc_partition *);
- enum xp_retval (*setup_ch_structures) (struct xpc_partition *);
- void (*teardown_ch_structures) (struct xpc_partition *);
-
- enum xp_retval (*make_first_contact) (struct xpc_partition *);
-
- u64 (*get_chctl_all_flags) (struct xpc_partition *);
- void (*send_chctl_closerequest) (struct xpc_channel *, unsigned long *);
- void (*send_chctl_closereply) (struct xpc_channel *, unsigned long *);
- void (*send_chctl_openrequest) (struct xpc_channel *, unsigned long *);
- void (*send_chctl_openreply) (struct xpc_channel *, unsigned long *);
- void (*send_chctl_opencomplete) (struct xpc_channel *, unsigned long *);
- void (*process_msg_chctl_flags) (struct xpc_partition *, int);
-
- enum xp_retval (*save_remote_msgqueue_pa) (struct xpc_channel *,
- unsigned long);
-
- enum xp_retval (*setup_msg_structures) (struct xpc_channel *);
- void (*teardown_msg_structures) (struct xpc_channel *);
-
- void (*indicate_partition_engaged) (struct xpc_partition *);
- void (*indicate_partition_disengaged) (struct xpc_partition *);
- void (*assume_partition_disengaged) (short);
- int (*partition_engaged) (short);
- int (*any_partition_engaged) (void);
-
- int (*n_of_deliverable_payloads) (struct xpc_channel *);
- enum xp_retval (*send_payload) (struct xpc_channel *, u32, void *,
- u16, u8, xpc_notify_func, void *);
- void *(*get_deliverable_payload) (struct xpc_channel *);
- void (*received_payload) (struct xpc_channel *, void *);
- void (*notify_senders_of_disconnect) (struct xpc_channel *);
-};
-
-/* struct xpc_partition act_state values (for XPC HB) */
-
-#define XPC_P_AS_INACTIVE 0x00 /* partition is not active */
-#define XPC_P_AS_ACTIVATION_REQ 0x01 /* created thread to activate */
-#define XPC_P_AS_ACTIVATING 0x02 /* activation thread started */
-#define XPC_P_AS_ACTIVE 0x03 /* xpc_partition_up() was called */
-#define XPC_P_AS_DEACTIVATING 0x04 /* partition deactivation initiated */
-
-#define XPC_DEACTIVATE_PARTITION(_p, _reason) \
- xpc_deactivate_partition(__LINE__, (_p), (_reason))
-
-/* struct xpc_partition setup_state values */
-
-#define XPC_P_SS_UNSET 0x00 /* infrastructure was never setup */
-#define XPC_P_SS_SETUP 0x01 /* infrastructure is setup */
-#define XPC_P_SS_WTEARDOWN 0x02 /* waiting to teardown infrastructure */
-#define XPC_P_SS_TORNDOWN 0x03 /* infrastructure is torndown */
-
-/* number of seconds to wait for other partitions to disengage */
-#define XPC_DISENGAGE_DEFAULT_TIMELIMIT 90
-
-/* interval in seconds to print 'waiting deactivation' messages */
-#define XPC_DEACTIVATE_PRINTMSG_INTERVAL 10
-
-#define XPC_PARTID(_p) ((short)((_p) - &xpc_partitions[0]))
-
-/* found in xp_main.c */
-extern struct xpc_registration xpc_registrations[];
-
-/* found in xpc_main.c */
-extern struct device *xpc_part;
-extern struct device *xpc_chan;
-extern struct xpc_arch_operations xpc_arch_ops;
-extern int xpc_disengage_timelimit;
-extern int xpc_disengage_timedout;
-extern int xpc_activate_IRQ_rcvd;
-extern spinlock_t xpc_activate_IRQ_rcvd_lock;
-extern wait_queue_head_t xpc_activate_IRQ_wq;
-extern void *xpc_kzalloc_cacheline_aligned(size_t, gfp_t, void **);
-extern void xpc_activate_partition(struct xpc_partition *);
-extern void xpc_activate_kthreads(struct xpc_channel *, int);
-extern void xpc_create_kthreads(struct xpc_channel *, int, int);
-extern void xpc_disconnect_wait(int);
-
-/* found in xpc_uv.c */
-extern int xpc_init_uv(void);
-extern void xpc_exit_uv(void);
-
-/* found in xpc_partition.c */
-extern int xpc_exiting;
-extern int xpc_nasid_mask_nlongs;
-extern struct xpc_rsvd_page *xpc_rsvd_page;
-extern unsigned long *xpc_mach_nasids;
-extern struct xpc_partition *xpc_partitions;
-extern void *xpc_kmalloc_cacheline_aligned(size_t, gfp_t, void **);
-extern int xpc_setup_rsvd_page(void);
-extern void xpc_teardown_rsvd_page(void);
-extern int xpc_identify_activate_IRQ_sender(void);
-extern int xpc_partition_disengaged(struct xpc_partition *);
-extern int xpc_partition_disengaged_from_timer(struct xpc_partition *part);
-extern enum xp_retval xpc_mark_partition_active(struct xpc_partition *);
-extern void xpc_mark_partition_inactive(struct xpc_partition *);
-extern void xpc_discovery(void);
-extern enum xp_retval xpc_get_remote_rp(int, unsigned long *,
- struct xpc_rsvd_page *,
- unsigned long *);
-extern void xpc_deactivate_partition(const int, struct xpc_partition *,
- enum xp_retval);
-extern enum xp_retval xpc_initiate_partid_to_nasids(short, void *);
-
-/* found in xpc_channel.c */
-extern void xpc_initiate_connect(int);
-extern void xpc_initiate_disconnect(int);
-extern enum xp_retval xpc_allocate_msg_wait(struct xpc_channel *);
-extern enum xp_retval xpc_initiate_send(short, int, u32, void *, u16);
-extern enum xp_retval xpc_initiate_send_notify(short, int, u32, void *, u16,
- xpc_notify_func, void *);
-extern void xpc_initiate_received(short, int, void *);
-extern void xpc_process_sent_chctl_flags(struct xpc_partition *);
-extern void xpc_connected_callout(struct xpc_channel *);
-extern void xpc_deliver_payload(struct xpc_channel *);
-extern void xpc_disconnect_channel(const int, struct xpc_channel *,
- enum xp_retval, unsigned long *);
-extern void xpc_disconnect_callout(struct xpc_channel *, enum xp_retval);
-extern void xpc_partition_going_down(struct xpc_partition *, enum xp_retval);
-
-static inline void
-xpc_wakeup_channel_mgr(struct xpc_partition *part)
-{
- if (atomic_inc_return(&part->channel_mgr_requests) == 1)
- wake_up(&part->channel_mgr_wq);
-}
-
-/*
- * These next two inlines are used to keep us from tearing down a channel's
- * msg queues while a thread may be referencing them.
- */
-static inline void
-xpc_msgqueue_ref(struct xpc_channel *ch)
-{
- atomic_inc(&ch->references);
-}
-
-static inline void
-xpc_msgqueue_deref(struct xpc_channel *ch)
-{
- s32 refs = atomic_dec_return(&ch->references);
-
- DBUG_ON(refs < 0);
- if (refs == 0)
- xpc_wakeup_channel_mgr(&xpc_partitions[ch->partid]);
-}
-
-#define XPC_DISCONNECT_CHANNEL(_ch, _reason, _irqflgs) \
- xpc_disconnect_channel(__LINE__, _ch, _reason, _irqflgs)
-
-/*
- * These two inlines are used to keep us from tearing down a partition's
- * setup infrastructure while a thread may be referencing it.
- */
-static inline void
-xpc_part_deref(struct xpc_partition *part)
-{
- s32 refs = atomic_dec_return(&part->references);
-
- DBUG_ON(refs < 0);
- if (refs == 0 && part->setup_state == XPC_P_SS_WTEARDOWN)
- wake_up(&part->teardown_wq);
-}
-
-static inline int
-xpc_part_ref(struct xpc_partition *part)
-{
- int setup;
-
- atomic_inc(&part->references);
- setup = (part->setup_state == XPC_P_SS_SETUP);
- if (!setup)
- xpc_part_deref(part);
-
- return setup;
-}
-
-/*
- * The following macro is to be used for the setting of the reason and
- * reason_line fields in both the struct xpc_channel and struct xpc_partition
- * structures.
- */
-#define XPC_SET_REASON(_p, _reason, _line) \
- { \
- (_p)->reason = _reason; \
- (_p)->reason_line = _line; \
- }
-
-#endif /* _DRIVERS_MISC_SGIXP_XPC_H */
diff --git a/drivers/misc/sgi-xp/xpc_channel.c b/drivers/misc/sgi-xp/xpc_channel.c
deleted file mode 100644
index 8e6607fc8a67..000000000000
--- a/drivers/misc/sgi-xp/xpc_channel.c
+++ /dev/null
@@ -1,1011 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (c) 2004-2009 Silicon Graphics, Inc. All Rights Reserved.
- */
-
-/*
- * Cross Partition Communication (XPC) channel support.
- *
- * This is the part of XPC that manages the channels and
- * sends/receives messages across them to/from other partitions.
- *
- */
-
-#include <linux/device.h>
-#include "xpc.h"
-
-/*
- * Process a connect message from a remote partition.
- *
- * Note: xpc_process_connect() is expecting to be called with the
- * spin_lock_irqsave held and will leave it locked upon return.
- */
-static void
-xpc_process_connect(struct xpc_channel *ch, unsigned long *irq_flags)
-{
- enum xp_retval ret;
-
- lockdep_assert_held(&ch->lock);
-
- if (!(ch->flags & XPC_C_OPENREQUEST) ||
- !(ch->flags & XPC_C_ROPENREQUEST)) {
- /* nothing more to do for now */
- return;
- }
- DBUG_ON(!(ch->flags & XPC_C_CONNECTING));
-
- if (!(ch->flags & XPC_C_SETUP)) {
- spin_unlock_irqrestore(&ch->lock, *irq_flags);
- ret = xpc_arch_ops.setup_msg_structures(ch);
- spin_lock_irqsave(&ch->lock, *irq_flags);
-
- if (ret != xpSuccess)
- XPC_DISCONNECT_CHANNEL(ch, ret, irq_flags);
- else
- ch->flags |= XPC_C_SETUP;
-
- if (ch->flags & XPC_C_DISCONNECTING)
- return;
- }
-
- if (!(ch->flags & XPC_C_OPENREPLY)) {
- ch->flags |= XPC_C_OPENREPLY;
- xpc_arch_ops.send_chctl_openreply(ch, irq_flags);
- }
-
- if (!(ch->flags & XPC_C_ROPENREPLY))
- return;
-
- if (!(ch->flags & XPC_C_OPENCOMPLETE)) {
- ch->flags |= (XPC_C_OPENCOMPLETE | XPC_C_CONNECTED);
- xpc_arch_ops.send_chctl_opencomplete(ch, irq_flags);
- }
-
- if (!(ch->flags & XPC_C_ROPENCOMPLETE))
- return;
-
- dev_info(xpc_chan, "channel %d to partition %d connected\n",
- ch->number, ch->partid);
-
- ch->flags = (XPC_C_CONNECTED | XPC_C_SETUP); /* clear all else */
-}
-
-/*
- * spin_lock_irqsave() is expected to be held on entry.
- */
-static void
-xpc_process_disconnect(struct xpc_channel *ch, unsigned long *irq_flags)
-{
- struct xpc_partition *part = &xpc_partitions[ch->partid];
- u32 channel_was_connected = (ch->flags & XPC_C_WASCONNECTED);
-
- lockdep_assert_held(&ch->lock);
-
- if (!(ch->flags & XPC_C_DISCONNECTING))
- return;
-
- DBUG_ON(!(ch->flags & XPC_C_CLOSEREQUEST));
-
- /* make sure all activity has settled down first */
-
- if (atomic_read(&ch->kthreads_assigned) > 0 ||
- atomic_read(&ch->references) > 0) {
- return;
- }
- DBUG_ON((ch->flags & XPC_C_CONNECTEDCALLOUT_MADE) &&
- !(ch->flags & XPC_C_DISCONNECTINGCALLOUT_MADE));
-
- if (part->act_state == XPC_P_AS_DEACTIVATING) {
- /* can't proceed until the other side disengages from us */
- if (xpc_arch_ops.partition_engaged(ch->partid))
- return;
-
- } else {
-
- /* as long as the other side is up do the full protocol */
-
- if (!(ch->flags & XPC_C_RCLOSEREQUEST))
- return;
-
- if (!(ch->flags & XPC_C_CLOSEREPLY)) {
- ch->flags |= XPC_C_CLOSEREPLY;
- xpc_arch_ops.send_chctl_closereply(ch, irq_flags);
- }
-
- if (!(ch->flags & XPC_C_RCLOSEREPLY))
- return;
- }
-
- /* wake those waiting for notify completion */
- if (atomic_read(&ch->n_to_notify) > 0) {
- /* we do callout while holding ch->lock, callout can't block */
- xpc_arch_ops.notify_senders_of_disconnect(ch);
- }
-
- /* both sides are disconnected now */
-
- if (ch->flags & XPC_C_DISCONNECTINGCALLOUT_MADE) {
- spin_unlock_irqrestore(&ch->lock, *irq_flags);
- xpc_disconnect_callout(ch, xpDisconnected);
- spin_lock_irqsave(&ch->lock, *irq_flags);
- }
-
- DBUG_ON(atomic_read(&ch->n_to_notify) != 0);
-
- /* it's now safe to free the channel's message queues */
- xpc_arch_ops.teardown_msg_structures(ch);
-
- ch->func = NULL;
- ch->key = NULL;
- ch->entry_size = 0;
- ch->local_nentries = 0;
- ch->remote_nentries = 0;
- ch->kthreads_assigned_limit = 0;
- ch->kthreads_idle_limit = 0;
-
- /*
- * Mark the channel disconnected and clear all other flags, including
- * XPC_C_SETUP (because of call to
- * xpc_arch_ops.teardown_msg_structures()) but not including
- * XPC_C_WDISCONNECT (if it was set).
- */
- ch->flags = (XPC_C_DISCONNECTED | (ch->flags & XPC_C_WDISCONNECT));
-
- atomic_dec(&part->nchannels_active);
-
- if (channel_was_connected) {
- dev_info(xpc_chan, "channel %d to partition %d disconnected, "
- "reason=%d\n", ch->number, ch->partid, ch->reason);
- }
-
- if (ch->flags & XPC_C_WDISCONNECT) {
- /* we won't lose the CPU since we're holding ch->lock */
- complete(&ch->wdisconnect_wait);
- } else if (ch->delayed_chctl_flags) {
- if (part->act_state != XPC_P_AS_DEACTIVATING) {
- /* time to take action on any delayed chctl flags */
- spin_lock(&part->chctl_lock);
- part->chctl.flags[ch->number] |=
- ch->delayed_chctl_flags;
- spin_unlock(&part->chctl_lock);
- }
- ch->delayed_chctl_flags = 0;
- }
-}
-
-/*
- * Process a change in the channel's remote connection state.
- */
-static void
-xpc_process_openclose_chctl_flags(struct xpc_partition *part, int ch_number,
- u8 chctl_flags)
-{
- unsigned long irq_flags;
- struct xpc_openclose_args *args =
- &part->remote_openclose_args[ch_number];
- struct xpc_channel *ch = &part->channels[ch_number];
- enum xp_retval reason;
- enum xp_retval ret;
- int create_kthread = 0;
-
- spin_lock_irqsave(&ch->lock, irq_flags);
-
-again:
-
- if ((ch->flags & XPC_C_DISCONNECTED) &&
- (ch->flags & XPC_C_WDISCONNECT)) {
- /*
- * Delay processing chctl flags until thread waiting disconnect
- * has had a chance to see that the channel is disconnected.
- */
- ch->delayed_chctl_flags |= chctl_flags;
- goto out;
- }
-
- if (chctl_flags & XPC_CHCTL_CLOSEREQUEST) {
-
- dev_dbg(xpc_chan, "XPC_CHCTL_CLOSEREQUEST (reason=%d) received "
- "from partid=%d, channel=%d\n", args->reason,
- ch->partid, ch->number);
-
- /*
- * If RCLOSEREQUEST is set, we're probably waiting for
- * RCLOSEREPLY. We should find it and a ROPENREQUEST packed
- * with this RCLOSEREQUEST in the chctl_flags.
- */
-
- if (ch->flags & XPC_C_RCLOSEREQUEST) {
- DBUG_ON(!(ch->flags & XPC_C_DISCONNECTING));
- DBUG_ON(!(ch->flags & XPC_C_CLOSEREQUEST));
- DBUG_ON(!(ch->flags & XPC_C_CLOSEREPLY));
- DBUG_ON(ch->flags & XPC_C_RCLOSEREPLY);
-
- DBUG_ON(!(chctl_flags & XPC_CHCTL_CLOSEREPLY));
- chctl_flags &= ~XPC_CHCTL_CLOSEREPLY;
- ch->flags |= XPC_C_RCLOSEREPLY;
-
- /* both sides have finished disconnecting */
- xpc_process_disconnect(ch, &irq_flags);
- DBUG_ON(!(ch->flags & XPC_C_DISCONNECTED));
- goto again;
- }
-
- if (ch->flags & XPC_C_DISCONNECTED) {
- if (!(chctl_flags & XPC_CHCTL_OPENREQUEST)) {
- if (part->chctl.flags[ch_number] &
- XPC_CHCTL_OPENREQUEST) {
-
- DBUG_ON(ch->delayed_chctl_flags != 0);
- spin_lock(&part->chctl_lock);
- part->chctl.flags[ch_number] |=
- XPC_CHCTL_CLOSEREQUEST;
- spin_unlock(&part->chctl_lock);
- }
- goto out;
- }
-
- XPC_SET_REASON(ch, 0, 0);
- ch->flags &= ~XPC_C_DISCONNECTED;
-
- atomic_inc(&part->nchannels_active);
- ch->flags |= (XPC_C_CONNECTING | XPC_C_ROPENREQUEST);
- }
-
- chctl_flags &= ~(XPC_CHCTL_OPENREQUEST | XPC_CHCTL_OPENREPLY |
- XPC_CHCTL_OPENCOMPLETE);
-
- /*
- * The meaningful CLOSEREQUEST connection state fields are:
- * reason = reason connection is to be closed
- */
-
- ch->flags |= XPC_C_RCLOSEREQUEST;
-
- if (!(ch->flags & XPC_C_DISCONNECTING)) {
- reason = args->reason;
- if (reason <= xpSuccess || reason > xpUnknownReason)
- reason = xpUnknownReason;
- else if (reason == xpUnregistering)
- reason = xpOtherUnregistering;
-
- XPC_DISCONNECT_CHANNEL(ch, reason, &irq_flags);
-
- DBUG_ON(chctl_flags & XPC_CHCTL_CLOSEREPLY);
- goto out;
- }
-
- xpc_process_disconnect(ch, &irq_flags);
- }
-
- if (chctl_flags & XPC_CHCTL_CLOSEREPLY) {
-
- dev_dbg(xpc_chan, "XPC_CHCTL_CLOSEREPLY received from partid="
- "%d, channel=%d\n", ch->partid, ch->number);
-
- if (ch->flags & XPC_C_DISCONNECTED) {
- DBUG_ON(part->act_state != XPC_P_AS_DEACTIVATING);
- goto out;
- }
-
- DBUG_ON(!(ch->flags & XPC_C_CLOSEREQUEST));
-
- if (!(ch->flags & XPC_C_RCLOSEREQUEST)) {
- if (part->chctl.flags[ch_number] &
- XPC_CHCTL_CLOSEREQUEST) {
-
- DBUG_ON(ch->delayed_chctl_flags != 0);
- spin_lock(&part->chctl_lock);
- part->chctl.flags[ch_number] |=
- XPC_CHCTL_CLOSEREPLY;
- spin_unlock(&part->chctl_lock);
- }
- goto out;
- }
-
- ch->flags |= XPC_C_RCLOSEREPLY;
-
- if (ch->flags & XPC_C_CLOSEREPLY) {
- /* both sides have finished disconnecting */
- xpc_process_disconnect(ch, &irq_flags);
- }
- }
-
- if (chctl_flags & XPC_CHCTL_OPENREQUEST) {
-
- dev_dbg(xpc_chan, "XPC_CHCTL_OPENREQUEST (entry_size=%d, "
- "local_nentries=%d) received from partid=%d, "
- "channel=%d\n", args->entry_size, args->local_nentries,
- ch->partid, ch->number);
-
- if (part->act_state == XPC_P_AS_DEACTIVATING ||
- (ch->flags & XPC_C_ROPENREQUEST)) {
- goto out;
- }
-
- if (ch->flags & (XPC_C_DISCONNECTING | XPC_C_WDISCONNECT)) {
- ch->delayed_chctl_flags |= XPC_CHCTL_OPENREQUEST;
- goto out;
- }
- DBUG_ON(!(ch->flags & (XPC_C_DISCONNECTED |
- XPC_C_OPENREQUEST)));
- DBUG_ON(ch->flags & (XPC_C_ROPENREQUEST | XPC_C_ROPENREPLY |
- XPC_C_OPENREPLY | XPC_C_CONNECTED));
-
- /*
- * The meaningful OPENREQUEST connection state fields are:
- * entry_size = size of channel's messages in bytes
- * local_nentries = remote partition's local_nentries
- */
- if (args->entry_size == 0 || args->local_nentries == 0) {
- /* assume OPENREQUEST was delayed by mistake */
- goto out;
- }
-
- ch->flags |= (XPC_C_ROPENREQUEST | XPC_C_CONNECTING);
- ch->remote_nentries = args->local_nentries;
-
- if (ch->flags & XPC_C_OPENREQUEST) {
- if (args->entry_size != ch->entry_size) {
- XPC_DISCONNECT_CHANNEL(ch, xpUnequalMsgSizes,
- &irq_flags);
- goto out;
- }
- } else {
- ch->entry_size = args->entry_size;
-
- XPC_SET_REASON(ch, 0, 0);
- ch->flags &= ~XPC_C_DISCONNECTED;
-
- atomic_inc(&part->nchannels_active);
- }
-
- xpc_process_connect(ch, &irq_flags);
- }
-
- if (chctl_flags & XPC_CHCTL_OPENREPLY) {
-
- dev_dbg(xpc_chan, "XPC_CHCTL_OPENREPLY (local_msgqueue_pa="
- "0x%lx, local_nentries=%d, remote_nentries=%d) "
- "received from partid=%d, channel=%d\n",
- args->local_msgqueue_pa, args->local_nentries,
- args->remote_nentries, ch->partid, ch->number);
-
- if (ch->flags & (XPC_C_DISCONNECTING | XPC_C_DISCONNECTED))
- goto out;
-
- if (!(ch->flags & XPC_C_OPENREQUEST)) {
- XPC_DISCONNECT_CHANNEL(ch, xpOpenCloseError,
- &irq_flags);
- goto out;
- }
-
- DBUG_ON(!(ch->flags & XPC_C_ROPENREQUEST));
- DBUG_ON(ch->flags & XPC_C_CONNECTED);
-
- /*
- * The meaningful OPENREPLY connection state fields are:
- * local_msgqueue_pa = physical address of remote
- * partition's local_msgqueue
- * local_nentries = remote partition's local_nentries
- * remote_nentries = remote partition's remote_nentries
- */
- DBUG_ON(args->local_msgqueue_pa == 0);
- DBUG_ON(args->local_nentries == 0);
- DBUG_ON(args->remote_nentries == 0);
-
- ret = xpc_arch_ops.save_remote_msgqueue_pa(ch,
- args->local_msgqueue_pa);
- if (ret != xpSuccess) {
- XPC_DISCONNECT_CHANNEL(ch, ret, &irq_flags);
- goto out;
- }
- ch->flags |= XPC_C_ROPENREPLY;
-
- if (args->local_nentries < ch->remote_nentries) {
- dev_dbg(xpc_chan, "XPC_CHCTL_OPENREPLY: new "
- "remote_nentries=%d, old remote_nentries=%d, "
- "partid=%d, channel=%d\n",
- args->local_nentries, ch->remote_nentries,
- ch->partid, ch->number);
-
- ch->remote_nentries = args->local_nentries;
- }
- if (args->remote_nentries < ch->local_nentries) {
- dev_dbg(xpc_chan, "XPC_CHCTL_OPENREPLY: new "
- "local_nentries=%d, old local_nentries=%d, "
- "partid=%d, channel=%d\n",
- args->remote_nentries, ch->local_nentries,
- ch->partid, ch->number);
-
- ch->local_nentries = args->remote_nentries;
- }
-
- xpc_process_connect(ch, &irq_flags);
- }
-
- if (chctl_flags & XPC_CHCTL_OPENCOMPLETE) {
-
- dev_dbg(xpc_chan, "XPC_CHCTL_OPENCOMPLETE received from "
- "partid=%d, channel=%d\n", ch->partid, ch->number);
-
- if (ch->flags & (XPC_C_DISCONNECTING | XPC_C_DISCONNECTED))
- goto out;
-
- if (!(ch->flags & XPC_C_OPENREQUEST) ||
- !(ch->flags & XPC_C_OPENREPLY)) {
- XPC_DISCONNECT_CHANNEL(ch, xpOpenCloseError,
- &irq_flags);
- goto out;
- }
-
- DBUG_ON(!(ch->flags & XPC_C_ROPENREQUEST));
- DBUG_ON(!(ch->flags & XPC_C_ROPENREPLY));
- DBUG_ON(!(ch->flags & XPC_C_CONNECTED));
-
- ch->flags |= XPC_C_ROPENCOMPLETE;
-
- xpc_process_connect(ch, &irq_flags);
- create_kthread = 1;
- }
-
-out:
- spin_unlock_irqrestore(&ch->lock, irq_flags);
-
- if (create_kthread)
- xpc_create_kthreads(ch, 1, 0);
-}
-
-/*
- * Attempt to establish a channel connection to a remote partition.
- */
-static enum xp_retval
-xpc_connect_channel(struct xpc_channel *ch)
-{
- unsigned long irq_flags;
- struct xpc_registration *registration = &xpc_registrations[ch->number];
-
- if (mutex_trylock(®istration->mutex) == 0)
- return xpRetry;
-
- if (!XPC_CHANNEL_REGISTERED(ch->number)) {
- mutex_unlock(®istration->mutex);
- return xpUnregistered;
- }
-
- spin_lock_irqsave(&ch->lock, irq_flags);
-
- DBUG_ON(ch->flags & XPC_C_CONNECTED);
- DBUG_ON(ch->flags & XPC_C_OPENREQUEST);
-
- if (ch->flags & XPC_C_DISCONNECTING) {
- spin_unlock_irqrestore(&ch->lock, irq_flags);
- mutex_unlock(®istration->mutex);
- return ch->reason;
- }
-
- /* add info from the channel connect registration to the channel */
-
- ch->kthreads_assigned_limit = registration->assigned_limit;
- ch->kthreads_idle_limit = registration->idle_limit;
- DBUG_ON(atomic_read(&ch->kthreads_assigned) != 0);
- DBUG_ON(atomic_read(&ch->kthreads_idle) != 0);
- DBUG_ON(atomic_read(&ch->kthreads_active) != 0);
-
- ch->func = registration->func;
- DBUG_ON(registration->func == NULL);
- ch->key = registration->key;
-
- ch->local_nentries = registration->nentries;
-
- if (ch->flags & XPC_C_ROPENREQUEST) {
- if (registration->entry_size != ch->entry_size) {
- /* the local and remote sides aren't the same */
-
- /*
- * Because XPC_DISCONNECT_CHANNEL() can block we're
- * forced to up the registration sema before we unlock
- * the channel lock. But that's okay here because we're
- * done with the part that required the registration
- * sema. XPC_DISCONNECT_CHANNEL() requires that the
- * channel lock be locked and will unlock and relock
- * the channel lock as needed.
- */
- mutex_unlock(®istration->mutex);
- XPC_DISCONNECT_CHANNEL(ch, xpUnequalMsgSizes,
- &irq_flags);
- spin_unlock_irqrestore(&ch->lock, irq_flags);
- return xpUnequalMsgSizes;
- }
- } else {
- ch->entry_size = registration->entry_size;
-
- XPC_SET_REASON(ch, 0, 0);
- ch->flags &= ~XPC_C_DISCONNECTED;
-
- atomic_inc(&xpc_partitions[ch->partid].nchannels_active);
- }
-
- mutex_unlock(®istration->mutex);
-
- /* initiate the connection */
-
- ch->flags |= (XPC_C_OPENREQUEST | XPC_C_CONNECTING);
- xpc_arch_ops.send_chctl_openrequest(ch, &irq_flags);
-
- xpc_process_connect(ch, &irq_flags);
-
- spin_unlock_irqrestore(&ch->lock, irq_flags);
-
- return xpSuccess;
-}
-
-void
-xpc_process_sent_chctl_flags(struct xpc_partition *part)
-{
- unsigned long irq_flags;
- union xpc_channel_ctl_flags chctl;
- struct xpc_channel *ch;
- int ch_number;
- u32 ch_flags;
-
- chctl.all_flags = xpc_arch_ops.get_chctl_all_flags(part);
-
- /*
- * Initiate channel connections for registered channels.
- *
- * For each connected channel that has pending messages activate idle
- * kthreads and/or create new kthreads as needed.
- */
-
- for (ch_number = 0; ch_number < part->nchannels; ch_number++) {
- ch = &part->channels[ch_number];
-
- /*
- * Process any open or close related chctl flags, and then deal
- * with connecting or disconnecting the channel as required.
- */
-
- if (chctl.flags[ch_number] & XPC_OPENCLOSE_CHCTL_FLAGS) {
- xpc_process_openclose_chctl_flags(part, ch_number,
- chctl.flags[ch_number]);
- }
-
- ch_flags = ch->flags; /* need an atomic snapshot of flags */
-
- if (ch_flags & XPC_C_DISCONNECTING) {
- spin_lock_irqsave(&ch->lock, irq_flags);
- xpc_process_disconnect(ch, &irq_flags);
- spin_unlock_irqrestore(&ch->lock, irq_flags);
- continue;
- }
-
- if (part->act_state == XPC_P_AS_DEACTIVATING)
- continue;
-
- if (!(ch_flags & XPC_C_CONNECTED)) {
- if (!(ch_flags & XPC_C_OPENREQUEST)) {
- DBUG_ON(ch_flags & XPC_C_SETUP);
- (void)xpc_connect_channel(ch);
- }
- continue;
- }
-
- /*
- * Process any message related chctl flags, this may involve
- * the activation of kthreads to deliver any pending messages
- * sent from the other partition.
- */
-
- if (chctl.flags[ch_number] & XPC_MSG_CHCTL_FLAGS)
- xpc_arch_ops.process_msg_chctl_flags(part, ch_number);
- }
-}
-
-/*
- * XPC's heartbeat code calls this function to inform XPC that a partition is
- * going down. XPC responds by tearing down the XPartition Communication
- * infrastructure used for the just downed partition.
- *
- * XPC's heartbeat code will never call this function and xpc_partition_up()
- * at the same time. Nor will it ever make multiple calls to either function
- * at the same time.
- */
-void
-xpc_partition_going_down(struct xpc_partition *part, enum xp_retval reason)
-{
- unsigned long irq_flags;
- int ch_number;
- struct xpc_channel *ch;
-
- dev_dbg(xpc_chan, "deactivating partition %d, reason=%d\n",
- XPC_PARTID(part), reason);
-
- if (!xpc_part_ref(part)) {
- /* infrastructure for this partition isn't currently set up */
- return;
- }
-
- /* disconnect channels associated with the partition going down */
-
- for (ch_number = 0; ch_number < part->nchannels; ch_number++) {
- ch = &part->channels[ch_number];
-
- xpc_msgqueue_ref(ch);
- spin_lock_irqsave(&ch->lock, irq_flags);
-
- XPC_DISCONNECT_CHANNEL(ch, reason, &irq_flags);
-
- spin_unlock_irqrestore(&ch->lock, irq_flags);
- xpc_msgqueue_deref(ch);
- }
-
- xpc_wakeup_channel_mgr(part);
-
- xpc_part_deref(part);
-}
-
-/*
- * Called by XP at the time of channel connection registration to cause
- * XPC to establish connections to all currently active partitions.
- */
-void
-xpc_initiate_connect(int ch_number)
-{
- short partid;
- struct xpc_partition *part;
-
- DBUG_ON(ch_number < 0 || ch_number >= XPC_MAX_NCHANNELS);
-
- for (partid = 0; partid < xp_max_npartitions; partid++) {
- part = &xpc_partitions[partid];
-
- if (xpc_part_ref(part)) {
- /*
- * Initiate the establishment of a connection on the
- * newly registered channel to the remote partition.
- */
- xpc_wakeup_channel_mgr(part);
- xpc_part_deref(part);
- }
- }
-}
-
-void
-xpc_connected_callout(struct xpc_channel *ch)
-{
- /* let the registerer know that a connection has been established */
-
- if (ch->func != NULL) {
- dev_dbg(xpc_chan, "ch->func() called, reason=xpConnected, "
- "partid=%d, channel=%d\n", ch->partid, ch->number);
-
- ch->func(xpConnected, ch->partid, ch->number,
- (void *)(u64)ch->local_nentries, ch->key);
-
- dev_dbg(xpc_chan, "ch->func() returned, reason=xpConnected, "
- "partid=%d, channel=%d\n", ch->partid, ch->number);
- }
-}
-
-/*
- * Called by XP at the time of channel connection unregistration to cause
- * XPC to teardown all current connections for the specified channel.
- *
- * Before returning xpc_initiate_disconnect() will wait until all connections
- * on the specified channel have been closed/torndown. So the caller can be
- * assured that they will not be receiving any more callouts from XPC to the
- * function they registered via xpc_connect().
- *
- * Arguments:
- *
- * ch_number - channel # to unregister.
- */
-void
-xpc_initiate_disconnect(int ch_number)
-{
- unsigned long irq_flags;
- short partid;
- struct xpc_partition *part;
- struct xpc_channel *ch;
-
- DBUG_ON(ch_number < 0 || ch_number >= XPC_MAX_NCHANNELS);
-
- /* initiate the channel disconnect for every active partition */
- for (partid = 0; partid < xp_max_npartitions; partid++) {
- part = &xpc_partitions[partid];
-
- if (xpc_part_ref(part)) {
- ch = &part->channels[ch_number];
- xpc_msgqueue_ref(ch);
-
- spin_lock_irqsave(&ch->lock, irq_flags);
-
- if (!(ch->flags & XPC_C_DISCONNECTED)) {
- ch->flags |= XPC_C_WDISCONNECT;
-
- XPC_DISCONNECT_CHANNEL(ch, xpUnregistering,
- &irq_flags);
- }
-
- spin_unlock_irqrestore(&ch->lock, irq_flags);
-
- xpc_msgqueue_deref(ch);
- xpc_part_deref(part);
- }
- }
-
- xpc_disconnect_wait(ch_number);
-}
-
-/*
- * To disconnect a channel, and reflect it back to all who may be waiting.
- *
- * An OPEN is not allowed until XPC_C_DISCONNECTING is cleared by
- * xpc_process_disconnect(), and if set, XPC_C_WDISCONNECT is cleared by
- * xpc_disconnect_wait().
- *
- * THE CHANNEL IS TO BE LOCKED BY THE CALLER AND WILL REMAIN LOCKED UPON RETURN.
- */
-void
-xpc_disconnect_channel(const int line, struct xpc_channel *ch,
- enum xp_retval reason, unsigned long *irq_flags)
-{
- u32 channel_was_connected = (ch->flags & XPC_C_CONNECTED);
-
- lockdep_assert_held(&ch->lock);
-
- if (ch->flags & (XPC_C_DISCONNECTING | XPC_C_DISCONNECTED))
- return;
-
- DBUG_ON(!(ch->flags & (XPC_C_CONNECTING | XPC_C_CONNECTED)));
-
- dev_dbg(xpc_chan, "reason=%d, line=%d, partid=%d, channel=%d\n",
- reason, line, ch->partid, ch->number);
-
- XPC_SET_REASON(ch, reason, line);
-
- ch->flags |= (XPC_C_CLOSEREQUEST | XPC_C_DISCONNECTING);
- /* some of these may not have been set */
- ch->flags &= ~(XPC_C_OPENREQUEST | XPC_C_OPENREPLY |
- XPC_C_ROPENREQUEST | XPC_C_ROPENREPLY |
- XPC_C_CONNECTING | XPC_C_CONNECTED);
-
- xpc_arch_ops.send_chctl_closerequest(ch, irq_flags);
-
- if (channel_was_connected)
- ch->flags |= XPC_C_WASCONNECTED;
-
- spin_unlock_irqrestore(&ch->lock, *irq_flags);
-
- /* wake all idle kthreads so they can exit */
- if (atomic_read(&ch->kthreads_idle) > 0) {
- wake_up_all(&ch->idle_wq);
-
- } else if ((ch->flags & XPC_C_CONNECTEDCALLOUT_MADE) &&
- !(ch->flags & XPC_C_DISCONNECTINGCALLOUT)) {
- /* start a kthread that will do the xpDisconnecting callout */
- xpc_create_kthreads(ch, 1, 1);
- }
-
- /* wake those waiting to allocate an entry from the local msg queue */
- if (atomic_read(&ch->n_on_msg_allocate_wq) > 0)
- wake_up(&ch->msg_allocate_wq);
-
- spin_lock_irqsave(&ch->lock, *irq_flags);
-}
-
-void
-xpc_disconnect_callout(struct xpc_channel *ch, enum xp_retval reason)
-{
- /*
- * Let the channel's registerer know that the channel is being
- * disconnected. We don't want to do this if the registerer was never
- * informed of a connection being made.
- */
-
- if (ch->func != NULL) {
- dev_dbg(xpc_chan, "ch->func() called, reason=%d, partid=%d, "
- "channel=%d\n", reason, ch->partid, ch->number);
-
- ch->func(reason, ch->partid, ch->number, NULL, ch->key);
-
- dev_dbg(xpc_chan, "ch->func() returned, reason=%d, partid=%d, "
- "channel=%d\n", reason, ch->partid, ch->number);
- }
-}
-
-/*
- * Wait for a message entry to become available for the specified channel,
- * but don't wait any longer than 1 jiffy.
- */
-enum xp_retval
-xpc_allocate_msg_wait(struct xpc_channel *ch)
-{
- enum xp_retval ret;
- DEFINE_WAIT(wait);
-
- if (ch->flags & XPC_C_DISCONNECTING) {
- DBUG_ON(ch->reason == xpInterrupted);
- return ch->reason;
- }
-
- atomic_inc(&ch->n_on_msg_allocate_wq);
- prepare_to_wait(&ch->msg_allocate_wq, &wait, TASK_INTERRUPTIBLE);
- ret = schedule_timeout(1);
- finish_wait(&ch->msg_allocate_wq, &wait);
- atomic_dec(&ch->n_on_msg_allocate_wq);
-
- if (ch->flags & XPC_C_DISCONNECTING) {
- ret = ch->reason;
- DBUG_ON(ch->reason == xpInterrupted);
- } else if (ret == 0) {
- ret = xpTimeout;
- } else {
- ret = xpInterrupted;
- }
-
- return ret;
-}
-
-/*
- * Send a message that contains the user's payload on the specified channel
- * connected to the specified partition.
- *
- * NOTE that this routine can sleep waiting for a message entry to become
- * available. To not sleep, pass in the XPC_NOWAIT flag.
- *
- * Once sent, this routine will not wait for the message to be received, nor
- * will notification be given when it does happen.
- *
- * Arguments:
- *
- * partid - ID of partition to which the channel is connected.
- * ch_number - channel # to send message on.
- * flags - see xp.h for valid flags.
- * payload - pointer to the payload which is to be sent.
- * payload_size - size of the payload in bytes.
- */
-enum xp_retval
-xpc_initiate_send(short partid, int ch_number, u32 flags, void *payload,
- u16 payload_size)
-{
- struct xpc_partition *part = &xpc_partitions[partid];
- enum xp_retval ret = xpUnknownReason;
-
- dev_dbg(xpc_chan, "payload=0x%p, partid=%d, channel=%d\n", payload,
- partid, ch_number);
-
- DBUG_ON(partid < 0 || partid >= xp_max_npartitions);
- DBUG_ON(ch_number < 0 || ch_number >= part->nchannels);
- DBUG_ON(payload == NULL);
-
- if (xpc_part_ref(part)) {
- ret = xpc_arch_ops.send_payload(&part->channels[ch_number],
- flags, payload, payload_size, 0, NULL, NULL);
- xpc_part_deref(part);
- }
-
- return ret;
-}
-
-/*
- * Send a message that contains the user's payload on the specified channel
- * connected to the specified partition.
- *
- * NOTE that this routine can sleep waiting for a message entry to become
- * available. To not sleep, pass in the XPC_NOWAIT flag.
- *
- * This routine will not wait for the message to be sent or received.
- *
- * Once the remote end of the channel has received the message, the function
- * passed as an argument to xpc_initiate_send_notify() will be called. This
- * allows the sender to free up or re-use any buffers referenced by the
- * message, but does NOT mean the message has been processed at the remote
- * end by a receiver.
- *
- * If this routine returns an error, the caller's function will NOT be called.
- *
- * Arguments:
- *
- * partid - ID of partition to which the channel is connected.
- * ch_number - channel # to send message on.
- * flags - see xp.h for valid flags.
- * payload - pointer to the payload which is to be sent.
- * payload_size - size of the payload in bytes.
- * func - function to call with asynchronous notification of message
- * receipt. THIS FUNCTION MUST BE NON-BLOCKING.
- * key - user-defined key to be passed to the function when it's called.
- */
-enum xp_retval
-xpc_initiate_send_notify(short partid, int ch_number, u32 flags, void *payload,
- u16 payload_size, xpc_notify_func func, void *key)
-{
- struct xpc_partition *part = &xpc_partitions[partid];
- enum xp_retval ret = xpUnknownReason;
-
- dev_dbg(xpc_chan, "payload=0x%p, partid=%d, channel=%d\n", payload,
- partid, ch_number);
-
- DBUG_ON(partid < 0 || partid >= xp_max_npartitions);
- DBUG_ON(ch_number < 0 || ch_number >= part->nchannels);
- DBUG_ON(payload == NULL);
- DBUG_ON(func == NULL);
-
- if (xpc_part_ref(part)) {
- ret = xpc_arch_ops.send_payload(&part->channels[ch_number],
- flags, payload, payload_size, XPC_N_CALL, func, key);
- xpc_part_deref(part);
- }
- return ret;
-}
-
-/*
- * Deliver a message's payload to its intended recipient.
- */
-void
-xpc_deliver_payload(struct xpc_channel *ch)
-{
- void *payload;
-
- payload = xpc_arch_ops.get_deliverable_payload(ch);
- if (payload != NULL) {
-
- /*
- * This ref is taken to protect the payload itself from being
- * freed before the user is finished with it, which the user
- * indicates by calling xpc_initiate_received().
- */
- xpc_msgqueue_ref(ch);
-
- atomic_inc(&ch->kthreads_active);
-
- if (ch->func != NULL) {
- dev_dbg(xpc_chan, "ch->func() called, payload=0x%p "
- "partid=%d channel=%d\n", payload, ch->partid,
- ch->number);
-
- /* deliver the message to its intended recipient */
- ch->func(xpMsgReceived, ch->partid, ch->number, payload,
- ch->key);
-
- dev_dbg(xpc_chan, "ch->func() returned, payload=0x%p "
- "partid=%d channel=%d\n", payload, ch->partid,
- ch->number);
- }
-
- atomic_dec(&ch->kthreads_active);
- }
-}
-
-/*
- * Acknowledge receipt of a delivered message's payload.
- *
- * This function, although called by users, does not call xpc_part_ref() to
- * ensure that the partition infrastructure is in place. It relies on the
- * fact that we called xpc_msgqueue_ref() in xpc_deliver_payload().
- *
- * Arguments:
- *
- * partid - ID of partition to which the channel is connected.
- * ch_number - channel # message received on.
- * payload - pointer to the payload area allocated via
- * xpc_initiate_send() or xpc_initiate_send_notify().
- */
-void
-xpc_initiate_received(short partid, int ch_number, void *payload)
-{
- struct xpc_partition *part = &xpc_partitions[partid];
- struct xpc_channel *ch;
-
- DBUG_ON(partid < 0 || partid >= xp_max_npartitions);
- DBUG_ON(ch_number < 0 || ch_number >= part->nchannels);
-
- ch = &part->channels[ch_number];
- xpc_arch_ops.received_payload(ch, payload);
-
- /* the call to xpc_msgqueue_ref() was done by xpc_deliver_payload() */
- xpc_msgqueue_deref(ch);
-}
diff --git a/drivers/misc/sgi-xp/xpc_main.c b/drivers/misc/sgi-xp/xpc_main.c
deleted file mode 100644
index 15b6a8e35681..000000000000
--- a/drivers/misc/sgi-xp/xpc_main.c
+++ /dev/null
@@ -1,1309 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * (C) Copyright 2020 Hewlett Packard Enterprise Development LP
- * Copyright (c) 2004-2009 Silicon Graphics, Inc. All Rights Reserved.
- */
-
-/*
- * Cross Partition Communication (XPC) support - standard version.
- *
- * XPC provides a message passing capability that crosses partition
- * boundaries. This module is made up of two parts:
- *
- * partition This part detects the presence/absence of other
- * partitions. It provides a heartbeat and monitors
- * the heartbeats of other partitions.
- *
- * channel This part manages the channels and sends/receives
- * messages across them to/from other partitions.
- *
- * There are a couple of additional functions residing in XP, which
- * provide an interface to XPC for its users.
- *
- *
- * Caveats:
- *
- * . Currently on sn2, we have no way to determine which nasid an IRQ
- * came from. Thus, xpc_send_IRQ_sn2() does a remote amo write
- * followed by an IPI. The amo indicates where data is to be pulled
- * from, so after the IPI arrives, the remote partition checks the amo
- * word. The IPI can actually arrive before the amo however, so other
- * code must periodically check for this case. Also, remote amo
- * operations do not reliably time out. Thus we do a remote PIO read
- * solely to know whether the remote partition is down and whether we
- * should stop sending IPIs to it. This remote PIO read operation is
- * set up in a special nofault region so SAL knows to ignore (and
- * cleanup) any errors due to the remote amo write, PIO read, and/or
- * PIO write operations.
- *
- * If/when new hardware solves this IPI problem, we should abandon
- * the current approach.
- *
- */
-
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/sysctl.h>
-#include <linux/device.h>
-#include <linux/delay.h>
-#include <linux/reboot.h>
-#include <linux/kdebug.h>
-#include <linux/kthread.h>
-#include "xpc.h"
-
-#ifdef CONFIG_X86_64
-#include <asm/traps.h>
-#endif
-
-/* define two XPC debug device structures to be used with dev_dbg() et al */
-
-static struct device_driver xpc_dbg_name = {
- .name = "xpc"
-};
-
-static struct device xpc_part_dbg_subname = {
- .init_name = "", /* set to "part" at xpc_init() time */
- .driver = &xpc_dbg_name
-};
-
-static struct device xpc_chan_dbg_subname = {
- .init_name = "", /* set to "chan" at xpc_init() time */
- .driver = &xpc_dbg_name
-};
-
-struct device *xpc_part = &xpc_part_dbg_subname;
-struct device *xpc_chan = &xpc_chan_dbg_subname;
-
-static int xpc_kdebug_ignore;
-
-/* systune related variables for /proc/sys directories */
-
-static int xpc_hb_interval = XPC_HB_DEFAULT_INTERVAL;
-static int xpc_hb_min_interval = 1;
-static int xpc_hb_max_interval = 10;
-
-static int xpc_hb_check_interval = XPC_HB_CHECK_DEFAULT_INTERVAL;
-static int xpc_hb_check_min_interval = 10;
-static int xpc_hb_check_max_interval = 120;
-
-int xpc_disengage_timelimit = XPC_DISENGAGE_DEFAULT_TIMELIMIT;
-static int xpc_disengage_min_timelimit; /* = 0 */
-static int xpc_disengage_max_timelimit = 120;
-
-static const struct ctl_table xpc_sys_xpc_hb[] = {
- {
- .procname = "hb_interval",
- .data = &xpc_hb_interval,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &xpc_hb_min_interval,
- .extra2 = &xpc_hb_max_interval},
- {
- .procname = "hb_check_interval",
- .data = &xpc_hb_check_interval,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &xpc_hb_check_min_interval,
- .extra2 = &xpc_hb_check_max_interval},
-};
-static const struct ctl_table xpc_sys_xpc[] = {
- {
- .procname = "disengage_timelimit",
- .data = &xpc_disengage_timelimit,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &xpc_disengage_min_timelimit,
- .extra2 = &xpc_disengage_max_timelimit},
-};
-
-static struct ctl_table_header *xpc_sysctl;
-static struct ctl_table_header *xpc_sysctl_hb;
-
-/* non-zero if any remote partition disengage was timed out */
-int xpc_disengage_timedout;
-
-/* #of activate IRQs received and not yet processed */
-int xpc_activate_IRQ_rcvd;
-DEFINE_SPINLOCK(xpc_activate_IRQ_rcvd_lock);
-
-/* IRQ handler notifies this wait queue on receipt of an IRQ */
-DECLARE_WAIT_QUEUE_HEAD(xpc_activate_IRQ_wq);
-
-static unsigned long xpc_hb_check_timeout;
-static struct timer_list xpc_hb_timer;
-
-/* notification that the xpc_hb_checker thread has exited */
-static DECLARE_COMPLETION(xpc_hb_checker_exited);
-
-/* notification that the xpc_discovery thread has exited */
-static DECLARE_COMPLETION(xpc_discovery_exited);
-
-static void xpc_kthread_waitmsgs(struct xpc_partition *, struct xpc_channel *);
-
-static int xpc_system_reboot(struct notifier_block *, unsigned long, void *);
-static struct notifier_block xpc_reboot_notifier = {
- .notifier_call = xpc_system_reboot,
-};
-
-static int xpc_system_die(struct notifier_block *, unsigned long, void *);
-static struct notifier_block xpc_die_notifier = {
- .notifier_call = xpc_system_die,
-};
-
-struct xpc_arch_operations xpc_arch_ops;
-
-/*
- * Timer function to enforce the timelimit on the partition disengage.
- */
-static void
-xpc_timeout_partition_disengage(struct timer_list *t)
-{
- struct xpc_partition *part = timer_container_of(part, t,
- disengage_timer);
-
- DBUG_ON(time_is_after_jiffies(part->disengage_timeout));
-
- xpc_partition_disengaged_from_timer(part);
-
- DBUG_ON(part->disengage_timeout != 0);
- DBUG_ON(xpc_arch_ops.partition_engaged(XPC_PARTID(part)));
-}
-
-/*
- * Timer to produce the heartbeat. The timer structures function is
- * already set when this is initially called. A tunable is used to
- * specify when the next timeout should occur.
- */
-static void
-xpc_hb_beater(struct timer_list *unused)
-{
- xpc_arch_ops.increment_heartbeat();
-
- if (time_is_before_eq_jiffies(xpc_hb_check_timeout))
- wake_up_interruptible(&xpc_activate_IRQ_wq);
-
- xpc_hb_timer.expires = jiffies + (xpc_hb_interval * HZ);
- add_timer(&xpc_hb_timer);
-}
-
-static void
-xpc_start_hb_beater(void)
-{
- xpc_arch_ops.heartbeat_init();
- timer_setup(&xpc_hb_timer, xpc_hb_beater, 0);
- xpc_hb_beater(NULL);
-}
-
-static void
-xpc_stop_hb_beater(void)
-{
- timer_delete_sync(&xpc_hb_timer);
- xpc_arch_ops.heartbeat_exit();
-}
-
-/*
- * At periodic intervals, scan through all active partitions and ensure
- * their heartbeat is still active. If not, the partition is deactivated.
- */
-static void
-xpc_check_remote_hb(void)
-{
- struct xpc_partition *part;
- short partid;
- enum xp_retval ret;
-
- for (partid = 0; partid < xp_max_npartitions; partid++) {
-
- if (xpc_exiting)
- break;
-
- if (partid == xp_partition_id)
- continue;
-
- part = &xpc_partitions[partid];
-
- if (part->act_state == XPC_P_AS_INACTIVE ||
- part->act_state == XPC_P_AS_DEACTIVATING) {
- continue;
- }
-
- ret = xpc_arch_ops.get_remote_heartbeat(part);
- if (ret != xpSuccess)
- XPC_DEACTIVATE_PARTITION(part, ret);
- }
-}
-
-/*
- * This thread is responsible for nearly all of the partition
- * activation/deactivation.
- */
-static int
-xpc_hb_checker(void *ignore)
-{
- int force_IRQ = 0;
-
- /* this thread was marked active by xpc_hb_init() */
-
- set_cpus_allowed_ptr(current, cpumask_of(XPC_HB_CHECK_CPU));
-
- /* set our heartbeating to other partitions into motion */
- xpc_hb_check_timeout = jiffies + (xpc_hb_check_interval * HZ);
- xpc_start_hb_beater();
-
- while (!xpc_exiting) {
-
- dev_dbg(xpc_part, "woke up with %d ticks rem; %d IRQs have "
- "been received\n",
- (int)(xpc_hb_check_timeout - jiffies),
- xpc_activate_IRQ_rcvd);
-
- /* checking of remote heartbeats is skewed by IRQ handling */
- if (time_is_before_eq_jiffies(xpc_hb_check_timeout)) {
- xpc_hb_check_timeout = jiffies +
- (xpc_hb_check_interval * HZ);
-
- dev_dbg(xpc_part, "checking remote heartbeats\n");
- xpc_check_remote_hb();
- }
-
- /* check for outstanding IRQs */
- if (xpc_activate_IRQ_rcvd > 0 || force_IRQ != 0) {
- force_IRQ = 0;
- dev_dbg(xpc_part, "processing activate IRQs "
- "received\n");
- xpc_arch_ops.process_activate_IRQ_rcvd();
- }
-
- /* wait for IRQ or timeout */
- (void)wait_event_interruptible(xpc_activate_IRQ_wq,
- (time_is_before_eq_jiffies(
- xpc_hb_check_timeout) ||
- xpc_activate_IRQ_rcvd > 0 ||
- xpc_exiting));
- }
-
- xpc_stop_hb_beater();
-
- dev_dbg(xpc_part, "heartbeat checker is exiting\n");
-
- /* mark this thread as having exited */
- complete(&xpc_hb_checker_exited);
- return 0;
-}
-
-/*
- * This thread will attempt to discover other partitions to activate
- * based on info provided by SAL. This new thread is short lived and
- * will exit once discovery is complete.
- */
-static int
-xpc_initiate_discovery(void *ignore)
-{
- xpc_discovery();
-
- dev_dbg(xpc_part, "discovery thread is exiting\n");
-
- /* mark this thread as having exited */
- complete(&xpc_discovery_exited);
- return 0;
-}
-
-/*
- * The first kthread assigned to a newly activated partition is the one
- * created by XPC HB with which it calls xpc_activating(). XPC hangs on to
- * that kthread until the partition is brought down, at which time that kthread
- * returns back to XPC HB. (The return of that kthread will signify to XPC HB
- * that XPC has dismantled all communication infrastructure for the associated
- * partition.) This kthread becomes the channel manager for that partition.
- *
- * Each active partition has a channel manager, who, besides connecting and
- * disconnecting channels, will ensure that each of the partition's connected
- * channels has the required number of assigned kthreads to get the work done.
- */
-static void
-xpc_channel_mgr(struct xpc_partition *part)
-{
- while (part->act_state != XPC_P_AS_DEACTIVATING ||
- atomic_read(&part->nchannels_active) > 0 ||
- !xpc_partition_disengaged(part)) {
-
- xpc_process_sent_chctl_flags(part);
-
- /*
- * Wait until we've been requested to activate kthreads or
- * all of the channel's message queues have been torn down or
- * a signal is pending.
- *
- * The channel_mgr_requests is set to 1 after being awakened,
- * This is done to prevent the channel mgr from making one pass
- * through the loop for each request, since he will
- * be servicing all the requests in one pass. The reason it's
- * set to 1 instead of 0 is so that other kthreads will know
- * that the channel mgr is running and won't bother trying to
- * wake him up.
- */
- atomic_dec(&part->channel_mgr_requests);
- (void)wait_event_interruptible(part->channel_mgr_wq,
- (atomic_read(&part->channel_mgr_requests) > 0 ||
- part->chctl.all_flags != 0 ||
- (part->act_state == XPC_P_AS_DEACTIVATING &&
- atomic_read(&part->nchannels_active) == 0 &&
- xpc_partition_disengaged(part))));
- atomic_set(&part->channel_mgr_requests, 1);
- }
-}
-
-/*
- * Guarantee that the kzalloc'd memory is cacheline aligned.
- */
-void *
-xpc_kzalloc_cacheline_aligned(size_t size, gfp_t flags, void **base)
-{
- /* see if kzalloc will give us cachline aligned memory by default */
- *base = kzalloc(size, flags);
- if (*base == NULL)
- return NULL;
-
- if ((u64)*base == L1_CACHE_ALIGN((u64)*base))
- return *base;
-
- kfree(*base);
-
- /* nope, we'll have to do it ourselves */
- *base = kzalloc(size + L1_CACHE_BYTES, flags);
- if (*base == NULL)
- return NULL;
-
- return (void *)L1_CACHE_ALIGN((u64)*base);
-}
-
-/*
- * Setup the channel structures necessary to support XPartition Communication
- * between the specified remote partition and the local one.
- */
-static enum xp_retval
-xpc_setup_ch_structures(struct xpc_partition *part)
-{
- enum xp_retval ret;
- int ch_number;
- struct xpc_channel *ch;
- short partid = XPC_PARTID(part);
-
- /*
- * Allocate all of the channel structures as a contiguous chunk of
- * memory.
- */
- DBUG_ON(part->channels != NULL);
- part->channels = kzalloc_objs(struct xpc_channel, XPC_MAX_NCHANNELS);
- if (part->channels == NULL) {
- dev_err(xpc_chan, "can't get memory for channels\n");
- return xpNoMemory;
- }
-
- /* allocate the remote open and close args */
-
- part->remote_openclose_args =
- xpc_kzalloc_cacheline_aligned(XPC_OPENCLOSE_ARGS_SIZE,
- GFP_KERNEL, &part->
- remote_openclose_args_base);
- if (part->remote_openclose_args == NULL) {
- dev_err(xpc_chan, "can't get memory for remote connect args\n");
- ret = xpNoMemory;
- goto out_1;
- }
-
- part->chctl.all_flags = 0;
- spin_lock_init(&part->chctl_lock);
-
- atomic_set(&part->channel_mgr_requests, 1);
- init_waitqueue_head(&part->channel_mgr_wq);
-
- part->nchannels = XPC_MAX_NCHANNELS;
-
- atomic_set(&part->nchannels_active, 0);
- atomic_set(&part->nchannels_engaged, 0);
-
- for (ch_number = 0; ch_number < part->nchannels; ch_number++) {
- ch = &part->channels[ch_number];
-
- ch->partid = partid;
- ch->number = ch_number;
- ch->flags = XPC_C_DISCONNECTED;
-
- atomic_set(&ch->kthreads_assigned, 0);
- atomic_set(&ch->kthreads_idle, 0);
- atomic_set(&ch->kthreads_active, 0);
-
- atomic_set(&ch->references, 0);
- atomic_set(&ch->n_to_notify, 0);
-
- spin_lock_init(&ch->lock);
- init_completion(&ch->wdisconnect_wait);
-
- atomic_set(&ch->n_on_msg_allocate_wq, 0);
- init_waitqueue_head(&ch->msg_allocate_wq);
- init_waitqueue_head(&ch->idle_wq);
- }
-
- ret = xpc_arch_ops.setup_ch_structures(part);
- if (ret != xpSuccess)
- goto out_2;
-
- /*
- * With the setting of the partition setup_state to XPC_P_SS_SETUP,
- * we're declaring that this partition is ready to go.
- */
- part->setup_state = XPC_P_SS_SETUP;
-
- return xpSuccess;
-
- /* setup of ch structures failed */
-out_2:
- kfree(part->remote_openclose_args_base);
- part->remote_openclose_args = NULL;
-out_1:
- kfree(part->channels);
- part->channels = NULL;
- return ret;
-}
-
-/*
- * Teardown the channel structures necessary to support XPartition Communication
- * between the specified remote partition and the local one.
- */
-static void
-xpc_teardown_ch_structures(struct xpc_partition *part)
-{
- DBUG_ON(atomic_read(&part->nchannels_engaged) != 0);
- DBUG_ON(atomic_read(&part->nchannels_active) != 0);
-
- /*
- * Make this partition inaccessible to local processes by marking it
- * as no longer setup. Then wait before proceeding with the teardown
- * until all existing references cease.
- */
- DBUG_ON(part->setup_state != XPC_P_SS_SETUP);
- part->setup_state = XPC_P_SS_WTEARDOWN;
-
- wait_event(part->teardown_wq, (atomic_read(&part->references) == 0));
-
- /* now we can begin tearing down the infrastructure */
-
- xpc_arch_ops.teardown_ch_structures(part);
-
- kfree(part->remote_openclose_args_base);
- part->remote_openclose_args = NULL;
- kfree(part->channels);
- part->channels = NULL;
-
- part->setup_state = XPC_P_SS_TORNDOWN;
-}
-
-/*
- * When XPC HB determines that a partition has come up, it will create a new
- * kthread and that kthread will call this function to attempt to set up the
- * basic infrastructure used for Cross Partition Communication with the newly
- * upped partition.
- *
- * The kthread that was created by XPC HB and which setup the XPC
- * infrastructure will remain assigned to the partition becoming the channel
- * manager for that partition until the partition is deactivating, at which
- * time the kthread will teardown the XPC infrastructure and then exit.
- */
-static int
-xpc_activating(void *__partid)
-{
- short partid = (u64)__partid;
- struct xpc_partition *part = &xpc_partitions[partid];
- unsigned long irq_flags;
-
- DBUG_ON(partid < 0 || partid >= xp_max_npartitions);
-
- spin_lock_irqsave(&part->act_lock, irq_flags);
-
- if (part->act_state == XPC_P_AS_DEACTIVATING) {
- part->act_state = XPC_P_AS_INACTIVE;
- spin_unlock_irqrestore(&part->act_lock, irq_flags);
- part->remote_rp_pa = 0;
- return 0;
- }
-
- /* indicate the thread is activating */
- DBUG_ON(part->act_state != XPC_P_AS_ACTIVATION_REQ);
- part->act_state = XPC_P_AS_ACTIVATING;
-
- XPC_SET_REASON(part, 0, 0);
- spin_unlock_irqrestore(&part->act_lock, irq_flags);
-
- dev_dbg(xpc_part, "activating partition %d\n", partid);
-
- xpc_arch_ops.allow_hb(partid);
-
- if (xpc_setup_ch_structures(part) == xpSuccess) {
- (void)xpc_part_ref(part); /* this will always succeed */
-
- if (xpc_arch_ops.make_first_contact(part) == xpSuccess) {
- xpc_mark_partition_active(part);
- xpc_channel_mgr(part);
- /* won't return until partition is deactivating */
- }
-
- xpc_part_deref(part);
- xpc_teardown_ch_structures(part);
- }
-
- xpc_arch_ops.disallow_hb(partid);
- xpc_mark_partition_inactive(part);
-
- if (part->reason == xpReactivating) {
- /* interrupting ourselves results in activating partition */
- xpc_arch_ops.request_partition_reactivation(part);
- }
-
- return 0;
-}
-
-void
-xpc_activate_partition(struct xpc_partition *part)
-{
- short partid = XPC_PARTID(part);
- unsigned long irq_flags;
- struct task_struct *kthread;
-
- spin_lock_irqsave(&part->act_lock, irq_flags);
-
- DBUG_ON(part->act_state != XPC_P_AS_INACTIVE);
-
- part->act_state = XPC_P_AS_ACTIVATION_REQ;
- XPC_SET_REASON(part, xpCloneKThread, __LINE__);
-
- spin_unlock_irqrestore(&part->act_lock, irq_flags);
-
- kthread = kthread_run(xpc_activating, (void *)((u64)partid), "xpc%02d",
- partid);
- if (IS_ERR(kthread)) {
- spin_lock_irqsave(&part->act_lock, irq_flags);
- part->act_state = XPC_P_AS_INACTIVE;
- XPC_SET_REASON(part, xpCloneKThreadFailed, __LINE__);
- spin_unlock_irqrestore(&part->act_lock, irq_flags);
- }
-}
-
-void
-xpc_activate_kthreads(struct xpc_channel *ch, int needed)
-{
- int idle = atomic_read(&ch->kthreads_idle);
- int assigned = atomic_read(&ch->kthreads_assigned);
- int wakeup;
-
- DBUG_ON(needed <= 0);
-
- if (idle > 0) {
- wakeup = (needed > idle) ? idle : needed;
- needed -= wakeup;
-
- dev_dbg(xpc_chan, "wakeup %d idle kthreads, partid=%d, "
- "channel=%d\n", wakeup, ch->partid, ch->number);
-
- /* only wakeup the requested number of kthreads */
- wake_up_nr(&ch->idle_wq, wakeup);
- }
-
- if (needed <= 0)
- return;
-
- if (needed + assigned > ch->kthreads_assigned_limit) {
- needed = ch->kthreads_assigned_limit - assigned;
- if (needed <= 0)
- return;
- }
-
- dev_dbg(xpc_chan, "create %d new kthreads, partid=%d, channel=%d\n",
- needed, ch->partid, ch->number);
-
- xpc_create_kthreads(ch, needed, 0);
-}
-
-/*
- * This function is where XPC's kthreads wait for messages to deliver.
- */
-static void
-xpc_kthread_waitmsgs(struct xpc_partition *part, struct xpc_channel *ch)
-{
- int (*n_of_deliverable_payloads) (struct xpc_channel *) =
- xpc_arch_ops.n_of_deliverable_payloads;
-
- do {
- /* deliver messages to their intended recipients */
-
- while (n_of_deliverable_payloads(ch) > 0 &&
- !(ch->flags & XPC_C_DISCONNECTING)) {
- xpc_deliver_payload(ch);
- }
-
- if (atomic_inc_return(&ch->kthreads_idle) >
- ch->kthreads_idle_limit) {
- /* too many idle kthreads on this channel */
- atomic_dec(&ch->kthreads_idle);
- break;
- }
-
- dev_dbg(xpc_chan, "idle kthread calling "
- "wait_event_interruptible_exclusive()\n");
-
- (void)wait_event_interruptible_exclusive(ch->idle_wq,
- (n_of_deliverable_payloads(ch) > 0 ||
- (ch->flags & XPC_C_DISCONNECTING)));
-
- atomic_dec(&ch->kthreads_idle);
-
- } while (!(ch->flags & XPC_C_DISCONNECTING));
-}
-
-static int
-xpc_kthread_start(void *args)
-{
- short partid = XPC_UNPACK_ARG1(args);
- u16 ch_number = XPC_UNPACK_ARG2(args);
- struct xpc_partition *part = &xpc_partitions[partid];
- struct xpc_channel *ch;
- int n_needed;
- unsigned long irq_flags;
- int (*n_of_deliverable_payloads) (struct xpc_channel *) =
- xpc_arch_ops.n_of_deliverable_payloads;
-
- dev_dbg(xpc_chan, "kthread starting, partid=%d, channel=%d\n",
- partid, ch_number);
-
- ch = &part->channels[ch_number];
-
- if (!(ch->flags & XPC_C_DISCONNECTING)) {
-
- /* let registerer know that connection has been established */
-
- spin_lock_irqsave(&ch->lock, irq_flags);
- if (!(ch->flags & XPC_C_CONNECTEDCALLOUT)) {
- ch->flags |= XPC_C_CONNECTEDCALLOUT;
- spin_unlock_irqrestore(&ch->lock, irq_flags);
-
- xpc_connected_callout(ch);
-
- spin_lock_irqsave(&ch->lock, irq_flags);
- ch->flags |= XPC_C_CONNECTEDCALLOUT_MADE;
- spin_unlock_irqrestore(&ch->lock, irq_flags);
-
- /*
- * It is possible that while the callout was being
- * made that the remote partition sent some messages.
- * If that is the case, we may need to activate
- * additional kthreads to help deliver them. We only
- * need one less than total #of messages to deliver.
- */
- n_needed = n_of_deliverable_payloads(ch) - 1;
- if (n_needed > 0 && !(ch->flags & XPC_C_DISCONNECTING))
- xpc_activate_kthreads(ch, n_needed);
-
- } else {
- spin_unlock_irqrestore(&ch->lock, irq_flags);
- }
-
- xpc_kthread_waitmsgs(part, ch);
- }
-
- /* let registerer know that connection is disconnecting */
-
- spin_lock_irqsave(&ch->lock, irq_flags);
- if ((ch->flags & XPC_C_CONNECTEDCALLOUT_MADE) &&
- !(ch->flags & XPC_C_DISCONNECTINGCALLOUT)) {
- ch->flags |= XPC_C_DISCONNECTINGCALLOUT;
- spin_unlock_irqrestore(&ch->lock, irq_flags);
-
- xpc_disconnect_callout(ch, xpDisconnecting);
-
- spin_lock_irqsave(&ch->lock, irq_flags);
- ch->flags |= XPC_C_DISCONNECTINGCALLOUT_MADE;
- }
- spin_unlock_irqrestore(&ch->lock, irq_flags);
-
- if (atomic_dec_return(&ch->kthreads_assigned) == 0 &&
- atomic_dec_return(&part->nchannels_engaged) == 0) {
- xpc_arch_ops.indicate_partition_disengaged(part);
- }
-
- xpc_msgqueue_deref(ch);
-
- dev_dbg(xpc_chan, "kthread exiting, partid=%d, channel=%d\n",
- partid, ch_number);
-
- xpc_part_deref(part);
- return 0;
-}
-
-/*
- * For each partition that XPC has established communications with, there is
- * a minimum of one kernel thread assigned to perform any operation that
- * may potentially sleep or block (basically the callouts to the asynchronous
- * functions registered via xpc_connect()).
- *
- * Additional kthreads are created and destroyed by XPC as the workload
- * demands.
- *
- * A kthread is assigned to one of the active channels that exists for a given
- * partition.
- */
-void
-xpc_create_kthreads(struct xpc_channel *ch, int needed,
- int ignore_disconnecting)
-{
- unsigned long irq_flags;
- u64 args = XPC_PACK_ARGS(ch->partid, ch->number);
- struct xpc_partition *part = &xpc_partitions[ch->partid];
- struct task_struct *kthread;
- void (*indicate_partition_disengaged) (struct xpc_partition *) =
- xpc_arch_ops.indicate_partition_disengaged;
-
- while (needed-- > 0) {
-
- /*
- * The following is done on behalf of the newly created
- * kthread. That kthread is responsible for doing the
- * counterpart to the following before it exits.
- */
- if (ignore_disconnecting) {
- if (!atomic_inc_not_zero(&ch->kthreads_assigned)) {
- /* kthreads assigned had gone to zero */
- BUG_ON(!(ch->flags &
- XPC_C_DISCONNECTINGCALLOUT_MADE));
- break;
- }
-
- } else if (ch->flags & XPC_C_DISCONNECTING) {
- break;
-
- } else if (atomic_inc_return(&ch->kthreads_assigned) == 1 &&
- atomic_inc_return(&part->nchannels_engaged) == 1) {
- xpc_arch_ops.indicate_partition_engaged(part);
- }
- (void)xpc_part_ref(part);
- xpc_msgqueue_ref(ch);
-
- kthread = kthread_run(xpc_kthread_start, (void *)args,
- "xpc%02dc%d", ch->partid, ch->number);
- if (IS_ERR(kthread)) {
- /* the fork failed */
-
- /*
- * NOTE: if (ignore_disconnecting &&
- * !(ch->flags & XPC_C_DISCONNECTINGCALLOUT)) is true,
- * then we'll deadlock if all other kthreads assigned
- * to this channel are blocked in the channel's
- * registerer, because the only thing that will unblock
- * them is the xpDisconnecting callout that this
- * failed kthread_run() would have made.
- */
-
- if (atomic_dec_return(&ch->kthreads_assigned) == 0 &&
- atomic_dec_return(&part->nchannels_engaged) == 0) {
- indicate_partition_disengaged(part);
- }
- xpc_msgqueue_deref(ch);
- xpc_part_deref(part);
-
- if (atomic_read(&ch->kthreads_assigned) <
- ch->kthreads_idle_limit) {
- /*
- * Flag this as an error only if we have an
- * insufficient #of kthreads for the channel
- * to function.
- */
- spin_lock_irqsave(&ch->lock, irq_flags);
- XPC_DISCONNECT_CHANNEL(ch, xpLackOfResources,
- &irq_flags);
- spin_unlock_irqrestore(&ch->lock, irq_flags);
- }
- break;
- }
- }
-}
-
-void
-xpc_disconnect_wait(int ch_number)
-{
- unsigned long irq_flags;
- short partid;
- struct xpc_partition *part;
- struct xpc_channel *ch;
- int wakeup_channel_mgr;
-
- /* now wait for all callouts to the caller's function to cease */
- for (partid = 0; partid < xp_max_npartitions; partid++) {
- part = &xpc_partitions[partid];
-
- if (!xpc_part_ref(part))
- continue;
-
- ch = &part->channels[ch_number];
-
- if (!(ch->flags & XPC_C_WDISCONNECT)) {
- xpc_part_deref(part);
- continue;
- }
-
- wait_for_completion(&ch->wdisconnect_wait);
-
- spin_lock_irqsave(&ch->lock, irq_flags);
- DBUG_ON(!(ch->flags & XPC_C_DISCONNECTED));
- wakeup_channel_mgr = 0;
-
- if (ch->delayed_chctl_flags) {
- if (part->act_state != XPC_P_AS_DEACTIVATING) {
- spin_lock(&part->chctl_lock);
- part->chctl.flags[ch->number] |=
- ch->delayed_chctl_flags;
- spin_unlock(&part->chctl_lock);
- wakeup_channel_mgr = 1;
- }
- ch->delayed_chctl_flags = 0;
- }
-
- ch->flags &= ~XPC_C_WDISCONNECT;
- spin_unlock_irqrestore(&ch->lock, irq_flags);
-
- if (wakeup_channel_mgr)
- xpc_wakeup_channel_mgr(part);
-
- xpc_part_deref(part);
- }
-}
-
-static int
-xpc_setup_partitions(void)
-{
- short partid;
- struct xpc_partition *part;
-
- xpc_partitions = kzalloc_objs(struct xpc_partition, xp_max_npartitions);
- if (xpc_partitions == NULL) {
- dev_err(xpc_part, "can't get memory for partition structure\n");
- return -ENOMEM;
- }
-
- /*
- * The first few fields of each entry of xpc_partitions[] need to
- * be initialized now so that calls to xpc_connect() and
- * xpc_disconnect() can be made prior to the activation of any remote
- * partition. NOTE THAT NONE OF THE OTHER FIELDS BELONGING TO THESE
- * ENTRIES ARE MEANINGFUL UNTIL AFTER AN ENTRY'S CORRESPONDING
- * PARTITION HAS BEEN ACTIVATED.
- */
- for (partid = 0; partid < xp_max_npartitions; partid++) {
- part = &xpc_partitions[partid];
-
- DBUG_ON((u64)part != L1_CACHE_ALIGN((u64)part));
-
- part->activate_IRQ_rcvd = 0;
- spin_lock_init(&part->act_lock);
- part->act_state = XPC_P_AS_INACTIVE;
- XPC_SET_REASON(part, 0, 0);
-
- timer_setup(&part->disengage_timer,
- xpc_timeout_partition_disengage, 0);
-
- part->setup_state = XPC_P_SS_UNSET;
- init_waitqueue_head(&part->teardown_wq);
- atomic_set(&part->references, 0);
- }
-
- return xpc_arch_ops.setup_partitions();
-}
-
-static void
-xpc_teardown_partitions(void)
-{
- xpc_arch_ops.teardown_partitions();
- kfree(xpc_partitions);
-}
-
-static void
-xpc_do_exit(enum xp_retval reason)
-{
- short partid;
- int active_part_count, printed_waiting_msg = 0;
- struct xpc_partition *part;
- unsigned long printmsg_time, disengage_timeout = 0;
-
- /* a 'rmmod XPC' and a 'reboot' cannot both end up here together */
- DBUG_ON(xpc_exiting == 1);
-
- /*
- * Let the heartbeat checker thread and the discovery thread
- * (if one is running) know that they should exit. Also wake up
- * the heartbeat checker thread in case it's sleeping.
- */
- xpc_exiting = 1;
- wake_up_interruptible(&xpc_activate_IRQ_wq);
-
- /* wait for the discovery thread to exit */
- wait_for_completion(&xpc_discovery_exited);
-
- /* wait for the heartbeat checker thread to exit */
- wait_for_completion(&xpc_hb_checker_exited);
-
- /* sleep for a 1/3 of a second or so */
- (void)msleep_interruptible(300);
-
- /* wait for all partitions to become inactive */
-
- printmsg_time = jiffies + (XPC_DEACTIVATE_PRINTMSG_INTERVAL * HZ);
- xpc_disengage_timedout = 0;
-
- do {
- active_part_count = 0;
-
- for (partid = 0; partid < xp_max_npartitions; partid++) {
- part = &xpc_partitions[partid];
-
- if (xpc_partition_disengaged(part) &&
- part->act_state == XPC_P_AS_INACTIVE) {
- continue;
- }
-
- active_part_count++;
-
- XPC_DEACTIVATE_PARTITION(part, reason);
-
- if (part->disengage_timeout > disengage_timeout)
- disengage_timeout = part->disengage_timeout;
- }
-
- if (xpc_arch_ops.any_partition_engaged()) {
- if (time_is_before_jiffies(printmsg_time)) {
- dev_info(xpc_part, "waiting for remote "
- "partitions to deactivate, timeout in "
- "%ld seconds\n", (disengage_timeout -
- jiffies) / HZ);
- printmsg_time = jiffies +
- (XPC_DEACTIVATE_PRINTMSG_INTERVAL * HZ);
- printed_waiting_msg = 1;
- }
-
- } else if (active_part_count > 0) {
- if (printed_waiting_msg) {
- dev_info(xpc_part, "waiting for local partition"
- " to deactivate\n");
- printed_waiting_msg = 0;
- }
-
- } else {
- if (!xpc_disengage_timedout) {
- dev_info(xpc_part, "all partitions have "
- "deactivated\n");
- }
- break;
- }
-
- /* sleep for a 1/3 of a second or so */
- (void)msleep_interruptible(300);
-
- } while (1);
-
- DBUG_ON(xpc_arch_ops.any_partition_engaged());
-
- xpc_teardown_rsvd_page();
-
- if (reason == xpUnloading) {
- (void)unregister_die_notifier(&xpc_die_notifier);
- (void)unregister_reboot_notifier(&xpc_reboot_notifier);
- }
-
- /* clear the interface to XPC's functions */
- xpc_clear_interface();
-
- if (xpc_sysctl)
- unregister_sysctl_table(xpc_sysctl);
- if (xpc_sysctl_hb)
- unregister_sysctl_table(xpc_sysctl_hb);
-
- xpc_teardown_partitions();
-
- if (is_uv_system())
- xpc_exit_uv();
-}
-
-/*
- * This function is called when the system is being rebooted.
- */
-static int
-xpc_system_reboot(struct notifier_block *nb, unsigned long event, void *unused)
-{
- enum xp_retval reason;
-
- switch (event) {
- case SYS_RESTART:
- reason = xpSystemReboot;
- break;
- case SYS_HALT:
- reason = xpSystemHalt;
- break;
- case SYS_POWER_OFF:
- reason = xpSystemPoweroff;
- break;
- default:
- reason = xpSystemGoingDown;
- }
-
- xpc_do_exit(reason);
- return NOTIFY_DONE;
-}
-
-/* Used to only allow one cpu to complete disconnect */
-static unsigned int xpc_die_disconnecting;
-
-/*
- * Notify other partitions to deactivate from us by first disengaging from all
- * references to our memory.
- */
-static void
-xpc_die_deactivate(void)
-{
- struct xpc_partition *part;
- short partid;
- int any_engaged;
- long keep_waiting;
- long wait_to_print;
-
- if (cmpxchg(&xpc_die_disconnecting, 0, 1))
- return;
-
- /* keep xpc_hb_checker thread from doing anything (just in case) */
- xpc_exiting = 1;
-
- xpc_arch_ops.disallow_all_hbs(); /*indicate we're deactivated */
-
- for (partid = 0; partid < xp_max_npartitions; partid++) {
- part = &xpc_partitions[partid];
-
- if (xpc_arch_ops.partition_engaged(partid) ||
- part->act_state != XPC_P_AS_INACTIVE) {
- xpc_arch_ops.request_partition_deactivation(part);
- xpc_arch_ops.indicate_partition_disengaged(part);
- }
- }
-
- /*
- * Though we requested that all other partitions deactivate from us,
- * we only wait until they've all disengaged or we've reached the
- * defined timelimit.
- *
- * Given that one iteration through the following while-loop takes
- * approximately 200 microseconds, calculate the #of loops to take
- * before bailing and the #of loops before printing a waiting message.
- */
- keep_waiting = xpc_disengage_timelimit * 1000 * 5;
- wait_to_print = XPC_DEACTIVATE_PRINTMSG_INTERVAL * 1000 * 5;
-
- while (1) {
- any_engaged = xpc_arch_ops.any_partition_engaged();
- if (!any_engaged) {
- dev_info(xpc_part, "all partitions have deactivated\n");
- break;
- }
-
- if (!keep_waiting--) {
- for (partid = 0; partid < xp_max_npartitions;
- partid++) {
- if (xpc_arch_ops.partition_engaged(partid)) {
- dev_info(xpc_part, "deactivate from "
- "remote partition %d timed "
- "out\n", partid);
- }
- }
- break;
- }
-
- if (!wait_to_print--) {
- dev_info(xpc_part, "waiting for remote partitions to "
- "deactivate, timeout in %ld seconds\n",
- keep_waiting / (1000 * 5));
- wait_to_print = XPC_DEACTIVATE_PRINTMSG_INTERVAL *
- 1000 * 5;
- }
-
- udelay(200);
- }
-}
-
-/*
- * This function is called when the system is being restarted or halted due
- * to some sort of system failure. If this is the case we need to notify the
- * other partitions to disengage from all references to our memory.
- * This function can also be called when our heartbeater could be offlined
- * for a time. In this case we need to notify other partitions to not worry
- * about the lack of a heartbeat.
- */
-static int
-xpc_system_die(struct notifier_block *nb, unsigned long event, void *_die_args)
-{
- struct die_args *die_args = _die_args;
-
- switch (event) {
- case DIE_TRAP:
- if (die_args->trapnr == X86_TRAP_DF)
- xpc_die_deactivate();
-
- if (((die_args->trapnr == X86_TRAP_MF) ||
- (die_args->trapnr == X86_TRAP_XF)) &&
- !user_mode(die_args->regs))
- xpc_die_deactivate();
-
- break;
- case DIE_INT3:
- case DIE_DEBUG:
- break;
- case DIE_OOPS:
- case DIE_GPF:
- default:
- xpc_die_deactivate();
- }
-
- return NOTIFY_DONE;
-}
-
-static int __init
-xpc_init(void)
-{
- int ret;
- struct task_struct *kthread;
-
- dev_set_name(xpc_part, "part");
- dev_set_name(xpc_chan, "chan");
-
- if (is_uv_system()) {
- ret = xpc_init_uv();
-
- } else {
- ret = -ENODEV;
- }
-
- if (ret != 0)
- return ret;
-
- ret = xpc_setup_partitions();
- if (ret != 0) {
- dev_err(xpc_part, "can't get memory for partition structure\n");
- goto out_1;
- }
-
- xpc_sysctl = register_sysctl("xpc", xpc_sys_xpc);
- xpc_sysctl_hb = register_sysctl("xpc/hb", xpc_sys_xpc_hb);
-
- /*
- * Fill the partition reserved page with the information needed by
- * other partitions to discover we are alive and establish initial
- * communications.
- */
- ret = xpc_setup_rsvd_page();
- if (ret != 0) {
- dev_err(xpc_part, "can't setup our reserved page\n");
- goto out_2;
- }
-
- /* add ourselves to the reboot_notifier_list */
- ret = register_reboot_notifier(&xpc_reboot_notifier);
- if (ret != 0)
- dev_warn(xpc_part, "can't register reboot notifier\n");
-
- /* add ourselves to the die_notifier list */
- ret = register_die_notifier(&xpc_die_notifier);
- if (ret != 0)
- dev_warn(xpc_part, "can't register die notifier\n");
-
- /*
- * The real work-horse behind xpc. This processes incoming
- * interrupts and monitors remote heartbeats.
- */
- kthread = kthread_run(xpc_hb_checker, NULL, XPC_HB_CHECK_THREAD_NAME);
- if (IS_ERR(kthread)) {
- dev_err(xpc_part, "failed while forking hb check thread\n");
- ret = -EBUSY;
- goto out_3;
- }
-
- /*
- * Startup a thread that will attempt to discover other partitions to
- * activate based on info provided by SAL. This new thread is short
- * lived and will exit once discovery is complete.
- */
- kthread = kthread_run(xpc_initiate_discovery, NULL,
- XPC_DISCOVERY_THREAD_NAME);
- if (IS_ERR(kthread)) {
- dev_err(xpc_part, "failed while forking discovery thread\n");
-
- /* mark this new thread as a non-starter */
- complete(&xpc_discovery_exited);
-
- xpc_do_exit(xpUnloading);
- return -EBUSY;
- }
-
- /* set the interface to point at XPC's functions */
- xpc_set_interface(xpc_initiate_connect, xpc_initiate_disconnect,
- xpc_initiate_send, xpc_initiate_send_notify,
- xpc_initiate_received, xpc_initiate_partid_to_nasids);
-
- return 0;
-
- /* initialization was not successful */
-out_3:
- xpc_teardown_rsvd_page();
-
- (void)unregister_die_notifier(&xpc_die_notifier);
- (void)unregister_reboot_notifier(&xpc_reboot_notifier);
-out_2:
- if (xpc_sysctl_hb)
- unregister_sysctl_table(xpc_sysctl_hb);
- if (xpc_sysctl)
- unregister_sysctl_table(xpc_sysctl);
-
- xpc_teardown_partitions();
-out_1:
- if (is_uv_system())
- xpc_exit_uv();
- return ret;
-}
-
-module_init(xpc_init);
-
-static void __exit
-xpc_exit(void)
-{
- xpc_do_exit(xpUnloading);
-}
-
-module_exit(xpc_exit);
-
-MODULE_AUTHOR("Silicon Graphics, Inc.");
-MODULE_DESCRIPTION("Cross Partition Communication (XPC) support");
-MODULE_LICENSE("GPL");
-
-module_param(xpc_hb_interval, int, 0);
-MODULE_PARM_DESC(xpc_hb_interval, "Number of seconds between "
- "heartbeat increments.");
-
-module_param(xpc_hb_check_interval, int, 0);
-MODULE_PARM_DESC(xpc_hb_check_interval, "Number of seconds between "
- "heartbeat checks.");
-
-module_param(xpc_disengage_timelimit, int, 0);
-MODULE_PARM_DESC(xpc_disengage_timelimit, "Number of seconds to wait "
- "for disengage to complete.");
-
-module_param(xpc_kdebug_ignore, int, 0);
-MODULE_PARM_DESC(xpc_kdebug_ignore, "Should lack of heartbeat be ignored by "
- "other partitions when dropping into kdebug.");
diff --git a/drivers/misc/sgi-xp/xpc_partition.c b/drivers/misc/sgi-xp/xpc_partition.c
deleted file mode 100644
index d0467010558c..000000000000
--- a/drivers/misc/sgi-xp/xpc_partition.c
+++ /dev/null
@@ -1,545 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * (C) Copyright 2020 Hewlett Packard Enterprise Development LP
- * Copyright (c) 2004-2008 Silicon Graphics, Inc. All Rights Reserved.
- */
-
-/*
- * Cross Partition Communication (XPC) partition support.
- *
- * This is the part of XPC that detects the presence/absence of
- * other partitions. It provides a heartbeat and monitors the
- * heartbeats of other partitions.
- *
- */
-
-#include <linux/device.h>
-#include <linux/hardirq.h>
-#include <linux/slab.h>
-#include "xpc.h"
-#include <asm/uv/uv_hub.h>
-
-/* XPC is exiting flag */
-int xpc_exiting;
-
-/* this partition's reserved page pointers */
-struct xpc_rsvd_page *xpc_rsvd_page;
-static unsigned long *xpc_part_nasids;
-unsigned long *xpc_mach_nasids;
-
-static int xpc_nasid_mask_nbytes; /* #of bytes in nasid mask */
-int xpc_nasid_mask_nlongs; /* #of longs in nasid mask */
-
-struct xpc_partition *xpc_partitions;
-
-/*
- * Guarantee that the kmalloc'd memory is cacheline aligned.
- */
-void *
-xpc_kmalloc_cacheline_aligned(size_t size, gfp_t flags, void **base)
-{
- /* see if kmalloc will give us cachline aligned memory by default */
- *base = kmalloc(size, flags);
- if (*base == NULL)
- return NULL;
-
- if ((u64)*base == L1_CACHE_ALIGN((u64)*base))
- return *base;
-
- kfree(*base);
-
- /* nope, we'll have to do it ourselves */
- *base = kmalloc(size + L1_CACHE_BYTES, flags);
- if (*base == NULL)
- return NULL;
-
- return (void *)L1_CACHE_ALIGN((u64)*base);
-}
-
-/*
- * Given a nasid, get the physical address of the partition's reserved page
- * for that nasid. This function returns 0 on any error.
- */
-static unsigned long
-xpc_get_rsvd_page_pa(int nasid)
-{
- enum xp_retval ret;
- u64 cookie = 0;
- unsigned long rp_pa = nasid; /* seed with nasid */
- size_t len = 0;
- size_t buf_len = 0;
- void *buf = NULL;
- void *buf_base = NULL;
- enum xp_retval (*get_partition_rsvd_page_pa)
- (void *, u64 *, unsigned long *, size_t *) =
- xpc_arch_ops.get_partition_rsvd_page_pa;
-
- while (1) {
-
- /* !!! rp_pa will need to be _gpa on UV.
- * ??? So do we save it into the architecture specific parts
- * ??? of the xpc_partition structure? Do we rename this
- * ??? function or have two versions? Rename rp_pa for UV to
- * ??? rp_gpa?
- */
- ret = get_partition_rsvd_page_pa(buf, &cookie, &rp_pa, &len);
-
- dev_dbg(xpc_part, "SAL returned with ret=%d, cookie=0x%016lx, "
- "address=0x%016lx, len=0x%016lx\n", ret,
- (unsigned long)cookie, rp_pa, len);
-
- if (ret != xpNeedMoreInfo)
- break;
-
- if (len > buf_len) {
- kfree(buf_base);
- buf_len = L1_CACHE_ALIGN(len);
- buf = xpc_kmalloc_cacheline_aligned(buf_len, GFP_KERNEL,
- &buf_base);
- if (buf_base == NULL) {
- dev_err(xpc_part, "unable to kmalloc "
- "len=0x%016lx\n", buf_len);
- ret = xpNoMemory;
- break;
- }
- }
-
- ret = xp_remote_memcpy(xp_pa(buf), rp_pa, len);
- if (ret != xpSuccess) {
- dev_dbg(xpc_part, "xp_remote_memcpy failed %d\n", ret);
- break;
- }
- }
-
- kfree(buf_base);
-
- if (ret != xpSuccess)
- rp_pa = 0;
-
- dev_dbg(xpc_part, "reserved page at phys address 0x%016lx\n", rp_pa);
- return rp_pa;
-}
-
-/*
- * Fill the partition reserved page with the information needed by
- * other partitions to discover we are alive and establish initial
- * communications.
- */
-int
-xpc_setup_rsvd_page(void)
-{
- int ret;
- struct xpc_rsvd_page *rp;
- unsigned long rp_pa;
- unsigned long new_ts_jiffies;
-
- /* get the local reserved page's address */
-
- preempt_disable();
- rp_pa = xpc_get_rsvd_page_pa(xp_cpu_to_nasid(smp_processor_id()));
- preempt_enable();
- if (rp_pa == 0) {
- dev_err(xpc_part, "SAL failed to locate the reserved page\n");
- return -ESRCH;
- }
- rp = (struct xpc_rsvd_page *)__va(xp_socket_pa(rp_pa));
-
- if (rp->SAL_version < 3) {
- /* SAL_versions < 3 had a SAL_partid defined as a u8 */
- rp->SAL_partid &= 0xff;
- }
- BUG_ON(rp->SAL_partid != xp_partition_id);
-
- if (rp->SAL_partid < 0 || rp->SAL_partid >= xp_max_npartitions) {
- dev_err(xpc_part, "the reserved page's partid of %d is outside "
- "supported range (< 0 || >= %d)\n", rp->SAL_partid,
- xp_max_npartitions);
- return -EINVAL;
- }
-
- rp->version = XPC_RP_VERSION;
- rp->max_npartitions = xp_max_npartitions;
-
- /* establish the actual sizes of the nasid masks */
- if (rp->SAL_version == 1) {
- /* SAL_version 1 didn't set the nasids_size field */
- rp->SAL_nasids_size = 128;
- }
- xpc_nasid_mask_nbytes = rp->SAL_nasids_size;
- xpc_nasid_mask_nlongs = BITS_TO_LONGS(rp->SAL_nasids_size *
- BITS_PER_BYTE);
-
- /* setup the pointers to the various items in the reserved page */
- xpc_part_nasids = XPC_RP_PART_NASIDS(rp);
- xpc_mach_nasids = XPC_RP_MACH_NASIDS(rp);
-
- ret = xpc_arch_ops.setup_rsvd_page(rp);
- if (ret != 0)
- return ret;
-
- /*
- * Set timestamp of when reserved page was setup by XPC.
- * This signifies to the remote partition that our reserved
- * page is initialized.
- */
- new_ts_jiffies = jiffies;
- if (new_ts_jiffies == 0 || new_ts_jiffies == rp->ts_jiffies)
- new_ts_jiffies++;
- rp->ts_jiffies = new_ts_jiffies;
-
- xpc_rsvd_page = rp;
- return 0;
-}
-
-void
-xpc_teardown_rsvd_page(void)
-{
- /* a zero timestamp indicates our rsvd page is not initialized */
- xpc_rsvd_page->ts_jiffies = 0;
-}
-
-/*
- * Get a copy of a portion of the remote partition's rsvd page.
- *
- * remote_rp points to a buffer that is cacheline aligned for BTE copies and
- * is large enough to contain a copy of their reserved page header and
- * part_nasids mask.
- */
-enum xp_retval
-xpc_get_remote_rp(int nasid, unsigned long *discovered_nasids,
- struct xpc_rsvd_page *remote_rp, unsigned long *remote_rp_pa)
-{
- int l;
- enum xp_retval ret;
-
- /* get the reserved page's physical address */
-
- *remote_rp_pa = xpc_get_rsvd_page_pa(nasid);
- if (*remote_rp_pa == 0)
- return xpNoRsvdPageAddr;
-
- /* pull over the reserved page header and part_nasids mask */
- ret = xp_remote_memcpy(xp_pa(remote_rp), *remote_rp_pa,
- XPC_RP_HEADER_SIZE + xpc_nasid_mask_nbytes);
- if (ret != xpSuccess)
- return ret;
-
- if (discovered_nasids != NULL) {
- unsigned long *remote_part_nasids =
- XPC_RP_PART_NASIDS(remote_rp);
-
- for (l = 0; l < xpc_nasid_mask_nlongs; l++)
- discovered_nasids[l] |= remote_part_nasids[l];
- }
-
- /* zero timestamp indicates the reserved page has not been setup */
- if (remote_rp->ts_jiffies == 0)
- return xpRsvdPageNotSet;
-
- if (XPC_VERSION_MAJOR(remote_rp->version) !=
- XPC_VERSION_MAJOR(XPC_RP_VERSION)) {
- return xpBadVersion;
- }
-
- /* check that both remote and local partids are valid for each side */
- if (remote_rp->SAL_partid < 0 ||
- remote_rp->SAL_partid >= xp_max_npartitions ||
- remote_rp->max_npartitions <= xp_partition_id) {
- return xpInvalidPartid;
- }
-
- if (remote_rp->SAL_partid == xp_partition_id)
- return xpLocalPartid;
-
- return xpSuccess;
-}
-
-/*
- * See if the other side has responded to a partition deactivate request
- * from us. Though we requested the remote partition to deactivate with regard
- * to us, we really only need to wait for the other side to disengage from us.
- */
-static int __xpc_partition_disengaged(struct xpc_partition *part,
- bool from_timer)
-{
- short partid = XPC_PARTID(part);
- int disengaged;
-
- disengaged = !xpc_arch_ops.partition_engaged(partid);
- if (part->disengage_timeout) {
- if (!disengaged) {
- if (time_is_after_jiffies(part->disengage_timeout)) {
- /* timelimit hasn't been reached yet */
- return 0;
- }
-
- /*
- * Other side hasn't responded to our deactivate
- * request in a timely fashion, so assume it's dead.
- */
-
- dev_info(xpc_part, "deactivate request to remote "
- "partition %d timed out\n", partid);
- xpc_disengage_timedout = 1;
- xpc_arch_ops.assume_partition_disengaged(partid);
- disengaged = 1;
- }
- part->disengage_timeout = 0;
-
- /* Cancel the timer function if not called from it */
- if (!from_timer)
- timer_delete_sync(&part->disengage_timer);
-
- DBUG_ON(part->act_state != XPC_P_AS_DEACTIVATING &&
- part->act_state != XPC_P_AS_INACTIVE);
- if (part->act_state != XPC_P_AS_INACTIVE)
- xpc_wakeup_channel_mgr(part);
-
- xpc_arch_ops.cancel_partition_deactivation_request(part);
- }
- return disengaged;
-}
-
-int xpc_partition_disengaged(struct xpc_partition *part)
-{
- return __xpc_partition_disengaged(part, false);
-}
-
-int xpc_partition_disengaged_from_timer(struct xpc_partition *part)
-{
- return __xpc_partition_disengaged(part, true);
-}
-
-/*
- * Mark specified partition as active.
- */
-enum xp_retval
-xpc_mark_partition_active(struct xpc_partition *part)
-{
- unsigned long irq_flags;
- enum xp_retval ret;
-
- dev_dbg(xpc_part, "setting partition %d to ACTIVE\n", XPC_PARTID(part));
-
- spin_lock_irqsave(&part->act_lock, irq_flags);
- if (part->act_state == XPC_P_AS_ACTIVATING) {
- part->act_state = XPC_P_AS_ACTIVE;
- ret = xpSuccess;
- } else {
- DBUG_ON(part->reason == xpSuccess);
- ret = part->reason;
- }
- spin_unlock_irqrestore(&part->act_lock, irq_flags);
-
- return ret;
-}
-
-/*
- * Start the process of deactivating the specified partition.
- */
-void
-xpc_deactivate_partition(const int line, struct xpc_partition *part,
- enum xp_retval reason)
-{
- unsigned long irq_flags;
-
- spin_lock_irqsave(&part->act_lock, irq_flags);
-
- if (part->act_state == XPC_P_AS_INACTIVE) {
- XPC_SET_REASON(part, reason, line);
- spin_unlock_irqrestore(&part->act_lock, irq_flags);
- if (reason == xpReactivating) {
- /* we interrupt ourselves to reactivate partition */
- xpc_arch_ops.request_partition_reactivation(part);
- }
- return;
- }
- if (part->act_state == XPC_P_AS_DEACTIVATING) {
- if ((part->reason == xpUnloading && reason != xpUnloading) ||
- reason == xpReactivating) {
- XPC_SET_REASON(part, reason, line);
- }
- spin_unlock_irqrestore(&part->act_lock, irq_flags);
- return;
- }
-
- part->act_state = XPC_P_AS_DEACTIVATING;
- XPC_SET_REASON(part, reason, line);
-
- spin_unlock_irqrestore(&part->act_lock, irq_flags);
-
- /* ask remote partition to deactivate with regard to us */
- xpc_arch_ops.request_partition_deactivation(part);
-
- /* set a timelimit on the disengage phase of the deactivation request */
- part->disengage_timeout = jiffies + (xpc_disengage_timelimit * HZ);
- part->disengage_timer.expires = part->disengage_timeout;
- add_timer(&part->disengage_timer);
-
- dev_dbg(xpc_part, "bringing partition %d down, reason = %d\n",
- XPC_PARTID(part), reason);
-
- xpc_partition_going_down(part, reason);
-}
-
-/*
- * Mark specified partition as inactive.
- */
-void
-xpc_mark_partition_inactive(struct xpc_partition *part)
-{
- unsigned long irq_flags;
-
- dev_dbg(xpc_part, "setting partition %d to INACTIVE\n",
- XPC_PARTID(part));
-
- spin_lock_irqsave(&part->act_lock, irq_flags);
- part->act_state = XPC_P_AS_INACTIVE;
- spin_unlock_irqrestore(&part->act_lock, irq_flags);
- part->remote_rp_pa = 0;
-}
-
-/*
- * SAL has provided a partition and machine mask. The partition mask
- * contains a bit for each even nasid in our partition. The machine
- * mask contains a bit for each even nasid in the entire machine.
- *
- * Using those two bit arrays, we can determine which nasids are
- * known in the machine. Each should also have a reserved page
- * initialized if they are available for partitioning.
- */
-void
-xpc_discovery(void)
-{
- void *remote_rp_base;
- struct xpc_rsvd_page *remote_rp;
- unsigned long remote_rp_pa;
- int region;
- int region_size;
- int max_regions;
- int nasid;
- unsigned long *discovered_nasids;
- enum xp_retval ret;
-
- remote_rp = xpc_kmalloc_cacheline_aligned(XPC_RP_HEADER_SIZE +
- xpc_nasid_mask_nbytes,
- GFP_KERNEL, &remote_rp_base);
- if (remote_rp == NULL)
- return;
-
- discovered_nasids = kcalloc(xpc_nasid_mask_nlongs, sizeof(long),
- GFP_KERNEL);
- if (discovered_nasids == NULL) {
- kfree(remote_rp_base);
- return;
- }
-
- /*
- * The term 'region' in this context refers to the minimum number of
- * nodes that can comprise an access protection grouping. The access
- * protection is in regards to memory, IOI and IPI.
- */
- region_size = xp_region_size;
-
- if (is_uv_system())
- max_regions = 256;
- else {
- max_regions = 64;
-
- switch (region_size) {
- case 128:
- max_regions *= 2;
- fallthrough;
- case 64:
- max_regions *= 2;
- fallthrough;
- case 32:
- max_regions *= 2;
- region_size = 16;
- }
- }
-
- for (region = 0; region < max_regions; region++) {
-
- if (xpc_exiting)
- break;
-
- dev_dbg(xpc_part, "searching region %d\n", region);
-
- for (nasid = (region * region_size * 2);
- nasid < ((region + 1) * region_size * 2); nasid += 2) {
-
- if (xpc_exiting)
- break;
-
- dev_dbg(xpc_part, "checking nasid %d\n", nasid);
-
- if (test_bit(nasid / 2, xpc_part_nasids)) {
- dev_dbg(xpc_part, "PROM indicates Nasid %d is "
- "part of the local partition; skipping "
- "region\n", nasid);
- break;
- }
-
- if (!(test_bit(nasid / 2, xpc_mach_nasids))) {
- dev_dbg(xpc_part, "PROM indicates Nasid %d was "
- "not on Numa-Link network at reset\n",
- nasid);
- continue;
- }
-
- if (test_bit(nasid / 2, discovered_nasids)) {
- dev_dbg(xpc_part, "Nasid %d is part of a "
- "partition which was previously "
- "discovered\n", nasid);
- continue;
- }
-
- /* pull over the rsvd page header & part_nasids mask */
-
- ret = xpc_get_remote_rp(nasid, discovered_nasids,
- remote_rp, &remote_rp_pa);
- if (ret != xpSuccess) {
- dev_dbg(xpc_part, "unable to get reserved page "
- "from nasid %d, reason=%d\n", nasid,
- ret);
-
- if (ret == xpLocalPartid)
- break;
-
- continue;
- }
-
- xpc_arch_ops.request_partition_activation(remote_rp,
- remote_rp_pa, nasid);
- }
- }
-
- kfree(discovered_nasids);
- kfree(remote_rp_base);
-}
-
-/*
- * Given a partid, get the nasids owned by that partition from the
- * remote partition's reserved page.
- */
-enum xp_retval
-xpc_initiate_partid_to_nasids(short partid, void *nasid_mask)
-{
- struct xpc_partition *part;
- unsigned long part_nasid_pa;
-
- part = &xpc_partitions[partid];
- if (part->remote_rp_pa == 0)
- return xpPartitionDown;
-
- memset(nasid_mask, 0, xpc_nasid_mask_nbytes);
-
- part_nasid_pa = (unsigned long)XPC_RP_PART_NASIDS(part->remote_rp_pa);
-
- return xp_remote_memcpy(xp_pa(nasid_mask), part_nasid_pa,
- xpc_nasid_mask_nbytes);
-}
diff --git a/drivers/misc/sgi-xp/xpc_uv.c b/drivers/misc/sgi-xp/xpc_uv.c
deleted file mode 100644
index 772c78726893..000000000000
--- a/drivers/misc/sgi-xp/xpc_uv.c
+++ /dev/null
@@ -1,1728 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (c) 2008-2009 Silicon Graphics, Inc. All Rights Reserved.
- */
-
-/*
- * Cross Partition Communication (XPC) uv-based functions.
- *
- * Architecture specific implementation of common functions.
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-#include <linux/delay.h>
-#include <linux/device.h>
-#include <linux/cpu.h>
-#include <linux/module.h>
-#include <linux/err.h>
-#include <linux/slab.h>
-#include <linux/numa.h>
-#include <asm/uv/uv_hub.h>
-#include <asm/uv/bios.h>
-#include <asm/uv/uv_irq.h>
-#include "../sgi-gru/gru.h"
-#include "../sgi-gru/grukservices.h"
-#include "xpc.h"
-
-static struct xpc_heartbeat_uv *xpc_heartbeat_uv;
-
-#define XPC_ACTIVATE_MSG_SIZE_UV (1 * GRU_CACHE_LINE_BYTES)
-#define XPC_ACTIVATE_MQ_SIZE_UV (4 * XP_MAX_NPARTITIONS_UV * \
- XPC_ACTIVATE_MSG_SIZE_UV)
-#define XPC_ACTIVATE_IRQ_NAME "xpc_activate"
-
-#define XPC_NOTIFY_MSG_SIZE_UV (2 * GRU_CACHE_LINE_BYTES)
-#define XPC_NOTIFY_MQ_SIZE_UV (4 * XP_MAX_NPARTITIONS_UV * \
- XPC_NOTIFY_MSG_SIZE_UV)
-#define XPC_NOTIFY_IRQ_NAME "xpc_notify"
-
-static int xpc_mq_node = NUMA_NO_NODE;
-
-static struct xpc_gru_mq_uv *xpc_activate_mq_uv;
-static struct xpc_gru_mq_uv *xpc_notify_mq_uv;
-
-static int
-xpc_setup_partitions_uv(void)
-{
- short partid;
- struct xpc_partition_uv *part_uv;
-
- for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) {
- part_uv = &xpc_partitions[partid].sn.uv;
-
- mutex_init(&part_uv->cached_activate_gru_mq_desc_mutex);
- spin_lock_init(&part_uv->flags_lock);
- part_uv->remote_act_state = XPC_P_AS_INACTIVE;
- }
- return 0;
-}
-
-static void
-xpc_teardown_partitions_uv(void)
-{
- short partid;
- struct xpc_partition_uv *part_uv;
- unsigned long irq_flags;
-
- for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) {
- part_uv = &xpc_partitions[partid].sn.uv;
-
- if (part_uv->cached_activate_gru_mq_desc != NULL) {
- mutex_lock(&part_uv->cached_activate_gru_mq_desc_mutex);
- spin_lock_irqsave(&part_uv->flags_lock, irq_flags);
- part_uv->flags &= ~XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV;
- spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags);
- kfree(part_uv->cached_activate_gru_mq_desc);
- part_uv->cached_activate_gru_mq_desc = NULL;
- mutex_unlock(&part_uv->
- cached_activate_gru_mq_desc_mutex);
- }
- }
-}
-
-static int
-xpc_get_gru_mq_irq_uv(struct xpc_gru_mq_uv *mq, int cpu, char *irq_name)
-{
- int mmr_pnode = uv_blade_to_pnode(mq->mmr_blade);
-
- mq->irq = uv_setup_irq(irq_name, cpu, mq->mmr_blade, mq->mmr_offset,
- UV_AFFINITY_CPU);
- if (mq->irq < 0)
- return mq->irq;
-
- mq->mmr_value = uv_read_global_mmr64(mmr_pnode, mq->mmr_offset);
-
- return 0;
-}
-
-static void
-xpc_release_gru_mq_irq_uv(struct xpc_gru_mq_uv *mq)
-{
- uv_teardown_irq(mq->irq);
-}
-
-static int
-xpc_gru_mq_watchlist_alloc_uv(struct xpc_gru_mq_uv *mq)
-{
- int ret;
-
- ret = uv_bios_mq_watchlist_alloc(uv_gpa(mq->address),
- mq->order, &mq->mmr_offset);
- if (ret < 0) {
- dev_err(xpc_part, "uv_bios_mq_watchlist_alloc() failed, "
- "ret=%d\n", ret);
- return ret;
- }
-
- mq->watchlist_num = ret;
- return 0;
-}
-
-static void
-xpc_gru_mq_watchlist_free_uv(struct xpc_gru_mq_uv *mq)
-{
- int ret;
- int mmr_pnode = uv_blade_to_pnode(mq->mmr_blade);
-
- ret = uv_bios_mq_watchlist_free(mmr_pnode, mq->watchlist_num);
- BUG_ON(ret != BIOS_STATUS_SUCCESS);
-}
-
-static struct xpc_gru_mq_uv *
-xpc_create_gru_mq_uv(unsigned int mq_size, int cpu, char *irq_name,
- irq_handler_t irq_handler)
-{
- enum xp_retval xp_ret;
- int ret;
- int nid;
- int nasid;
- int pg_order;
- struct page *page;
- struct xpc_gru_mq_uv *mq;
- struct uv_IO_APIC_route_entry *mmr_value;
-
- mq = kmalloc_obj(struct xpc_gru_mq_uv);
- if (mq == NULL) {
- dev_err(xpc_part, "xpc_create_gru_mq_uv() failed to kmalloc() "
- "a xpc_gru_mq_uv structure\n");
- ret = -ENOMEM;
- goto out_0;
- }
-
- mq->gru_mq_desc = kzalloc_obj(struct gru_message_queue_desc);
- if (mq->gru_mq_desc == NULL) {
- dev_err(xpc_part, "xpc_create_gru_mq_uv() failed to kmalloc() "
- "a gru_message_queue_desc structure\n");
- ret = -ENOMEM;
- goto out_1;
- }
-
- pg_order = get_order(mq_size);
- mq->order = pg_order + PAGE_SHIFT;
- mq_size = 1UL << mq->order;
-
- mq->mmr_blade = uv_cpu_to_blade_id(cpu);
-
- nid = cpu_to_node(cpu);
- page = __alloc_pages_node(nid,
- GFP_KERNEL | __GFP_ZERO | __GFP_THISNODE,
- pg_order);
- if (page == NULL) {
- dev_err(xpc_part, "xpc_create_gru_mq_uv() failed to alloc %d "
- "bytes of memory on nid=%d for GRU mq\n", mq_size, nid);
- ret = -ENOMEM;
- goto out_2;
- }
- mq->address = page_address(page);
-
- /* enable generation of irq when GRU mq operation occurs to this mq */
- ret = xpc_gru_mq_watchlist_alloc_uv(mq);
- if (ret != 0)
- goto out_3;
-
- ret = xpc_get_gru_mq_irq_uv(mq, cpu, irq_name);
- if (ret != 0)
- goto out_4;
-
- ret = request_irq(mq->irq, irq_handler, 0, irq_name, NULL);
- if (ret != 0) {
- dev_err(xpc_part, "request_irq(irq=%d) returned error=%d\n",
- mq->irq, -ret);
- goto out_5;
- }
-
- nasid = UV_PNODE_TO_NASID(uv_cpu_to_pnode(cpu));
-
- mmr_value = (struct uv_IO_APIC_route_entry *)&mq->mmr_value;
- ret = gru_create_message_queue(mq->gru_mq_desc, mq->address, mq_size,
- nasid, mmr_value->vector, mmr_value->dest);
- if (ret != 0) {
- dev_err(xpc_part, "gru_create_message_queue() returned "
- "error=%d\n", ret);
- ret = -EINVAL;
- goto out_6;
- }
-
- /* allow other partitions to access this GRU mq */
- xp_ret = xp_expand_memprotect(xp_pa(mq->address), mq_size);
- if (xp_ret != xpSuccess) {
- ret = -EACCES;
- goto out_6;
- }
-
- return mq;
-
- /* something went wrong */
-out_6:
- free_irq(mq->irq, NULL);
-out_5:
- xpc_release_gru_mq_irq_uv(mq);
-out_4:
- xpc_gru_mq_watchlist_free_uv(mq);
-out_3:
- free_pages((unsigned long)mq->address, pg_order);
-out_2:
- kfree(mq->gru_mq_desc);
-out_1:
- kfree(mq);
-out_0:
- return ERR_PTR(ret);
-}
-
-static void
-xpc_destroy_gru_mq_uv(struct xpc_gru_mq_uv *mq)
-{
- unsigned int mq_size;
- int pg_order;
- int ret;
-
- /* disallow other partitions to access GRU mq */
- mq_size = 1UL << mq->order;
- ret = xp_restrict_memprotect(xp_pa(mq->address), mq_size);
- BUG_ON(ret != xpSuccess);
-
- /* unregister irq handler and release mq irq/vector mapping */
- free_irq(mq->irq, NULL);
- xpc_release_gru_mq_irq_uv(mq);
-
- /* disable generation of irq when GRU mq op occurs to this mq */
- xpc_gru_mq_watchlist_free_uv(mq);
-
- pg_order = mq->order - PAGE_SHIFT;
- free_pages((unsigned long)mq->address, pg_order);
-
- kfree(mq);
-}
-
-static enum xp_retval
-xpc_send_gru_msg(struct gru_message_queue_desc *gru_mq_desc, void *msg,
- size_t msg_size)
-{
- enum xp_retval xp_ret;
- int ret;
-
- while (1) {
- ret = gru_send_message_gpa(gru_mq_desc, msg, msg_size);
- if (ret == MQE_OK) {
- xp_ret = xpSuccess;
- break;
- }
-
- if (ret == MQE_QUEUE_FULL) {
- dev_dbg(xpc_chan, "gru_send_message_gpa() returned "
- "error=MQE_QUEUE_FULL\n");
- /* !!! handle QLimit reached; delay & try again */
- /* ??? Do we add a limit to the number of retries? */
- (void)msleep_interruptible(10);
- } else if (ret == MQE_CONGESTION) {
- dev_dbg(xpc_chan, "gru_send_message_gpa() returned "
- "error=MQE_CONGESTION\n");
- /* !!! handle LB Overflow; simply try again */
- /* ??? Do we add a limit to the number of retries? */
- } else {
- /* !!! Currently this is MQE_UNEXPECTED_CB_ERR */
- dev_err(xpc_chan, "gru_send_message_gpa() returned "
- "error=%d\n", ret);
- xp_ret = xpGruSendMqError;
- break;
- }
- }
- return xp_ret;
-}
-
-static void
-xpc_process_activate_IRQ_rcvd_uv(void)
-{
- unsigned long irq_flags;
- short partid;
- struct xpc_partition *part;
- u8 act_state_req;
-
- DBUG_ON(xpc_activate_IRQ_rcvd == 0);
-
- spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
- for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) {
- part = &xpc_partitions[partid];
-
- if (part->sn.uv.act_state_req == 0)
- continue;
-
- xpc_activate_IRQ_rcvd--;
- BUG_ON(xpc_activate_IRQ_rcvd < 0);
-
- act_state_req = part->sn.uv.act_state_req;
- part->sn.uv.act_state_req = 0;
- spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
-
- if (act_state_req == XPC_P_ASR_ACTIVATE_UV) {
- if (part->act_state == XPC_P_AS_INACTIVE)
- xpc_activate_partition(part);
- else if (part->act_state == XPC_P_AS_DEACTIVATING)
- XPC_DEACTIVATE_PARTITION(part, xpReactivating);
-
- } else if (act_state_req == XPC_P_ASR_REACTIVATE_UV) {
- if (part->act_state == XPC_P_AS_INACTIVE)
- xpc_activate_partition(part);
- else
- XPC_DEACTIVATE_PARTITION(part, xpReactivating);
-
- } else if (act_state_req == XPC_P_ASR_DEACTIVATE_UV) {
- XPC_DEACTIVATE_PARTITION(part, part->sn.uv.reason);
-
- } else {
- BUG();
- }
-
- spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
- if (xpc_activate_IRQ_rcvd == 0)
- break;
- }
- spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
-
-}
-
-static void
-xpc_handle_activate_mq_msg_uv(struct xpc_partition *part,
- struct xpc_activate_mq_msghdr_uv *msg_hdr,
- int part_setup,
- int *wakeup_hb_checker)
-{
- unsigned long irq_flags;
- struct xpc_partition_uv *part_uv = &part->sn.uv;
- struct xpc_openclose_args *args;
-
- part_uv->remote_act_state = msg_hdr->act_state;
-
- switch (msg_hdr->type) {
- case XPC_ACTIVATE_MQ_MSG_SYNC_ACT_STATE_UV:
- /* syncing of remote_act_state was just done above */
- break;
-
- case XPC_ACTIVATE_MQ_MSG_ACTIVATE_REQ_UV: {
- struct xpc_activate_mq_msg_activate_req_uv *msg;
-
- /*
- * ??? Do we deal here with ts_jiffies being different
- * ??? if act_state != XPC_P_AS_INACTIVE instead of
- * ??? below?
- */
- msg = container_of(msg_hdr, struct
- xpc_activate_mq_msg_activate_req_uv, hdr);
-
- spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
- if (part_uv->act_state_req == 0)
- xpc_activate_IRQ_rcvd++;
- part_uv->act_state_req = XPC_P_ASR_ACTIVATE_UV;
- part->remote_rp_pa = msg->rp_gpa; /* !!! _pa is _gpa */
- part->remote_rp_ts_jiffies = msg_hdr->rp_ts_jiffies;
- part_uv->heartbeat_gpa = msg->heartbeat_gpa;
-
- if (msg->activate_gru_mq_desc_gpa !=
- part_uv->activate_gru_mq_desc_gpa) {
- spin_lock(&part_uv->flags_lock);
- part_uv->flags &= ~XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV;
- spin_unlock(&part_uv->flags_lock);
- part_uv->activate_gru_mq_desc_gpa =
- msg->activate_gru_mq_desc_gpa;
- }
- spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
-
- (*wakeup_hb_checker)++;
- break;
- }
- case XPC_ACTIVATE_MQ_MSG_DEACTIVATE_REQ_UV: {
- struct xpc_activate_mq_msg_deactivate_req_uv *msg;
-
- msg = container_of(msg_hdr, struct
- xpc_activate_mq_msg_deactivate_req_uv, hdr);
-
- spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
- if (part_uv->act_state_req == 0)
- xpc_activate_IRQ_rcvd++;
- part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV;
- part_uv->reason = msg->reason;
- spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
-
- (*wakeup_hb_checker)++;
- return;
- }
- case XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREQUEST_UV: {
- struct xpc_activate_mq_msg_chctl_closerequest_uv *msg;
-
- if (!part_setup)
- break;
-
- msg = container_of(msg_hdr, struct
- xpc_activate_mq_msg_chctl_closerequest_uv,
- hdr);
- args = &part->remote_openclose_args[msg->ch_number];
- args->reason = msg->reason;
-
- spin_lock_irqsave(&part->chctl_lock, irq_flags);
- part->chctl.flags[msg->ch_number] |= XPC_CHCTL_CLOSEREQUEST;
- spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
-
- xpc_wakeup_channel_mgr(part);
- break;
- }
- case XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREPLY_UV: {
- struct xpc_activate_mq_msg_chctl_closereply_uv *msg;
-
- if (!part_setup)
- break;
-
- msg = container_of(msg_hdr, struct
- xpc_activate_mq_msg_chctl_closereply_uv,
- hdr);
-
- spin_lock_irqsave(&part->chctl_lock, irq_flags);
- part->chctl.flags[msg->ch_number] |= XPC_CHCTL_CLOSEREPLY;
- spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
-
- xpc_wakeup_channel_mgr(part);
- break;
- }
- case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREQUEST_UV: {
- struct xpc_activate_mq_msg_chctl_openrequest_uv *msg;
-
- if (!part_setup)
- break;
-
- msg = container_of(msg_hdr, struct
- xpc_activate_mq_msg_chctl_openrequest_uv,
- hdr);
- args = &part->remote_openclose_args[msg->ch_number];
- args->entry_size = msg->entry_size;
- args->local_nentries = msg->local_nentries;
-
- spin_lock_irqsave(&part->chctl_lock, irq_flags);
- part->chctl.flags[msg->ch_number] |= XPC_CHCTL_OPENREQUEST;
- spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
-
- xpc_wakeup_channel_mgr(part);
- break;
- }
- case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREPLY_UV: {
- struct xpc_activate_mq_msg_chctl_openreply_uv *msg;
-
- if (!part_setup)
- break;
-
- msg = container_of(msg_hdr, struct
- xpc_activate_mq_msg_chctl_openreply_uv, hdr);
- args = &part->remote_openclose_args[msg->ch_number];
- args->remote_nentries = msg->remote_nentries;
- args->local_nentries = msg->local_nentries;
- args->local_msgqueue_pa = msg->notify_gru_mq_desc_gpa;
-
- spin_lock_irqsave(&part->chctl_lock, irq_flags);
- part->chctl.flags[msg->ch_number] |= XPC_CHCTL_OPENREPLY;
- spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
-
- xpc_wakeup_channel_mgr(part);
- break;
- }
- case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENCOMPLETE_UV: {
- struct xpc_activate_mq_msg_chctl_opencomplete_uv *msg;
-
- if (!part_setup)
- break;
-
- msg = container_of(msg_hdr, struct
- xpc_activate_mq_msg_chctl_opencomplete_uv, hdr);
- spin_lock_irqsave(&part->chctl_lock, irq_flags);
- part->chctl.flags[msg->ch_number] |= XPC_CHCTL_OPENCOMPLETE;
- spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
-
- xpc_wakeup_channel_mgr(part);
- }
- fallthrough;
- case XPC_ACTIVATE_MQ_MSG_MARK_ENGAGED_UV:
- spin_lock_irqsave(&part_uv->flags_lock, irq_flags);
- part_uv->flags |= XPC_P_ENGAGED_UV;
- spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags);
- break;
-
- case XPC_ACTIVATE_MQ_MSG_MARK_DISENGAGED_UV:
- spin_lock_irqsave(&part_uv->flags_lock, irq_flags);
- part_uv->flags &= ~XPC_P_ENGAGED_UV;
- spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags);
- break;
-
- default:
- dev_err(xpc_part, "received unknown activate_mq msg type=%d "
- "from partition=%d\n", msg_hdr->type, XPC_PARTID(part));
-
- /* get hb checker to deactivate from the remote partition */
- spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
- if (part_uv->act_state_req == 0)
- xpc_activate_IRQ_rcvd++;
- part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV;
- part_uv->reason = xpBadMsgType;
- spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
-
- (*wakeup_hb_checker)++;
- return;
- }
-
- if (msg_hdr->rp_ts_jiffies != part->remote_rp_ts_jiffies &&
- part->remote_rp_ts_jiffies != 0) {
- /*
- * ??? Does what we do here need to be sensitive to
- * ??? act_state or remote_act_state?
- */
- spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
- if (part_uv->act_state_req == 0)
- xpc_activate_IRQ_rcvd++;
- part_uv->act_state_req = XPC_P_ASR_REACTIVATE_UV;
- spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
-
- (*wakeup_hb_checker)++;
- }
-}
-
-static irqreturn_t
-xpc_handle_activate_IRQ_uv(int irq, void *dev_id)
-{
- struct xpc_activate_mq_msghdr_uv *msg_hdr;
- short partid;
- struct xpc_partition *part;
- int wakeup_hb_checker = 0;
- int part_referenced;
-
- while (1) {
- msg_hdr = gru_get_next_message(xpc_activate_mq_uv->gru_mq_desc);
- if (msg_hdr == NULL)
- break;
-
- partid = msg_hdr->partid;
- if (partid < 0 || partid >= XP_MAX_NPARTITIONS_UV) {
- dev_err(xpc_part, "xpc_handle_activate_IRQ_uv() "
- "received invalid partid=0x%x in message\n",
- partid);
- } else {
- part = &xpc_partitions[partid];
-
- part_referenced = xpc_part_ref(part);
- xpc_handle_activate_mq_msg_uv(part, msg_hdr,
- part_referenced,
- &wakeup_hb_checker);
- if (part_referenced)
- xpc_part_deref(part);
- }
-
- gru_free_message(xpc_activate_mq_uv->gru_mq_desc, msg_hdr);
- }
-
- if (wakeup_hb_checker)
- wake_up_interruptible(&xpc_activate_IRQ_wq);
-
- return IRQ_HANDLED;
-}
-
-static enum xp_retval
-xpc_cache_remote_gru_mq_desc_uv(struct gru_message_queue_desc *gru_mq_desc,
- unsigned long gru_mq_desc_gpa)
-{
- enum xp_retval ret;
-
- ret = xp_remote_memcpy(uv_gpa(gru_mq_desc), gru_mq_desc_gpa,
- sizeof(struct gru_message_queue_desc));
- if (ret == xpSuccess)
- gru_mq_desc->mq = NULL;
-
- return ret;
-}
-
-static enum xp_retval
-xpc_send_activate_IRQ_uv(struct xpc_partition *part, void *msg, size_t msg_size,
- int msg_type)
-{
- struct xpc_activate_mq_msghdr_uv *msg_hdr = msg;
- struct xpc_partition_uv *part_uv = &part->sn.uv;
- struct gru_message_queue_desc *gru_mq_desc;
- unsigned long irq_flags;
- enum xp_retval ret;
-
- DBUG_ON(msg_size > XPC_ACTIVATE_MSG_SIZE_UV);
-
- msg_hdr->type = msg_type;
- msg_hdr->partid = xp_partition_id;
- msg_hdr->act_state = part->act_state;
- msg_hdr->rp_ts_jiffies = xpc_rsvd_page->ts_jiffies;
-
- mutex_lock(&part_uv->cached_activate_gru_mq_desc_mutex);
-again:
- if (!(part_uv->flags & XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV)) {
- gru_mq_desc = part_uv->cached_activate_gru_mq_desc;
- if (gru_mq_desc == NULL) {
- gru_mq_desc = kmalloc_obj(struct gru_message_queue_desc,
- GFP_ATOMIC);
- if (gru_mq_desc == NULL) {
- ret = xpNoMemory;
- goto done;
- }
- part_uv->cached_activate_gru_mq_desc = gru_mq_desc;
- }
-
- ret = xpc_cache_remote_gru_mq_desc_uv(gru_mq_desc,
- part_uv->
- activate_gru_mq_desc_gpa);
- if (ret != xpSuccess)
- goto done;
-
- spin_lock_irqsave(&part_uv->flags_lock, irq_flags);
- part_uv->flags |= XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV;
- spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags);
- }
-
- /* ??? Is holding a spin_lock (ch->lock) during this call a bad idea? */
- ret = xpc_send_gru_msg(part_uv->cached_activate_gru_mq_desc, msg,
- msg_size);
- if (ret != xpSuccess) {
- smp_rmb(); /* ensure a fresh copy of part_uv->flags */
- if (!(part_uv->flags & XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV))
- goto again;
- }
-done:
- mutex_unlock(&part_uv->cached_activate_gru_mq_desc_mutex);
- return ret;
-}
-
-static void
-xpc_send_activate_IRQ_part_uv(struct xpc_partition *part, void *msg,
- size_t msg_size, int msg_type)
-{
- enum xp_retval ret;
-
- ret = xpc_send_activate_IRQ_uv(part, msg, msg_size, msg_type);
- if (unlikely(ret != xpSuccess))
- XPC_DEACTIVATE_PARTITION(part, ret);
-}
-
-static void
-xpc_send_activate_IRQ_ch_uv(struct xpc_channel *ch, unsigned long *irq_flags,
- void *msg, size_t msg_size, int msg_type)
-{
- struct xpc_partition *part = &xpc_partitions[ch->partid];
- enum xp_retval ret;
-
- ret = xpc_send_activate_IRQ_uv(part, msg, msg_size, msg_type);
- if (unlikely(ret != xpSuccess)) {
- if (irq_flags != NULL)
- spin_unlock_irqrestore(&ch->lock, *irq_flags);
-
- XPC_DEACTIVATE_PARTITION(part, ret);
-
- if (irq_flags != NULL)
- spin_lock_irqsave(&ch->lock, *irq_flags);
- }
-}
-
-static void
-xpc_send_local_activate_IRQ_uv(struct xpc_partition *part, int act_state_req)
-{
- unsigned long irq_flags;
- struct xpc_partition_uv *part_uv = &part->sn.uv;
-
- /*
- * !!! Make our side think that the remote partition sent an activate
- * !!! mq message our way by doing what the activate IRQ handler would
- * !!! do had one really been sent.
- */
-
- spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
- if (part_uv->act_state_req == 0)
- xpc_activate_IRQ_rcvd++;
- part_uv->act_state_req = act_state_req;
- spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
-
- wake_up_interruptible(&xpc_activate_IRQ_wq);
-}
-
-static enum xp_retval
-xpc_get_partition_rsvd_page_pa_uv(void *buf, u64 *cookie, unsigned long *rp_pa,
- size_t *len)
-{
- s64 status;
- enum xp_retval ret;
-
- status = uv_bios_reserved_page_pa((u64)buf, cookie, (u64 *)rp_pa,
- (u64 *)len);
- if (status == BIOS_STATUS_SUCCESS)
- ret = xpSuccess;
- else if (status == BIOS_STATUS_MORE_PASSES)
- ret = xpNeedMoreInfo;
- else
- ret = xpBiosError;
-
- return ret;
-}
-
-static int
-xpc_setup_rsvd_page_uv(struct xpc_rsvd_page *rp)
-{
- xpc_heartbeat_uv =
- &xpc_partitions[sn_partition_id].sn.uv.cached_heartbeat;
- rp->sn.uv.heartbeat_gpa = uv_gpa(xpc_heartbeat_uv);
- rp->sn.uv.activate_gru_mq_desc_gpa =
- uv_gpa(xpc_activate_mq_uv->gru_mq_desc);
- return 0;
-}
-
-static void
-xpc_allow_hb_uv(short partid)
-{
-}
-
-static void
-xpc_disallow_hb_uv(short partid)
-{
-}
-
-static void
-xpc_disallow_all_hbs_uv(void)
-{
-}
-
-static void
-xpc_increment_heartbeat_uv(void)
-{
- xpc_heartbeat_uv->value++;
-}
-
-static void
-xpc_offline_heartbeat_uv(void)
-{
- xpc_increment_heartbeat_uv();
- xpc_heartbeat_uv->offline = 1;
-}
-
-static void
-xpc_online_heartbeat_uv(void)
-{
- xpc_increment_heartbeat_uv();
- xpc_heartbeat_uv->offline = 0;
-}
-
-static void
-xpc_heartbeat_init_uv(void)
-{
- xpc_heartbeat_uv->value = 1;
- xpc_heartbeat_uv->offline = 0;
-}
-
-static void
-xpc_heartbeat_exit_uv(void)
-{
- xpc_offline_heartbeat_uv();
-}
-
-static enum xp_retval
-xpc_get_remote_heartbeat_uv(struct xpc_partition *part)
-{
- struct xpc_partition_uv *part_uv = &part->sn.uv;
- enum xp_retval ret;
-
- ret = xp_remote_memcpy(uv_gpa(&part_uv->cached_heartbeat),
- part_uv->heartbeat_gpa,
- sizeof(struct xpc_heartbeat_uv));
- if (ret != xpSuccess)
- return ret;
-
- if (part_uv->cached_heartbeat.value == part->last_heartbeat &&
- !part_uv->cached_heartbeat.offline) {
-
- ret = xpNoHeartbeat;
- } else {
- part->last_heartbeat = part_uv->cached_heartbeat.value;
- }
- return ret;
-}
-
-static void
-xpc_request_partition_activation_uv(struct xpc_rsvd_page *remote_rp,
- unsigned long remote_rp_gpa, int nasid)
-{
- short partid = remote_rp->SAL_partid;
- struct xpc_partition *part = &xpc_partitions[partid];
- struct xpc_activate_mq_msg_activate_req_uv msg;
-
- part->remote_rp_pa = remote_rp_gpa; /* !!! _pa here is really _gpa */
- part->remote_rp_ts_jiffies = remote_rp->ts_jiffies;
- part->sn.uv.heartbeat_gpa = remote_rp->sn.uv.heartbeat_gpa;
- part->sn.uv.activate_gru_mq_desc_gpa =
- remote_rp->sn.uv.activate_gru_mq_desc_gpa;
-
- /*
- * ??? Is it a good idea to make this conditional on what is
- * ??? potentially stale state information?
- */
- if (part->sn.uv.remote_act_state == XPC_P_AS_INACTIVE) {
- msg.rp_gpa = uv_gpa(xpc_rsvd_page);
- msg.heartbeat_gpa = xpc_rsvd_page->sn.uv.heartbeat_gpa;
- msg.activate_gru_mq_desc_gpa =
- xpc_rsvd_page->sn.uv.activate_gru_mq_desc_gpa;
- xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg),
- XPC_ACTIVATE_MQ_MSG_ACTIVATE_REQ_UV);
- }
-
- if (part->act_state == XPC_P_AS_INACTIVE)
- xpc_send_local_activate_IRQ_uv(part, XPC_P_ASR_ACTIVATE_UV);
-}
-
-static void
-xpc_request_partition_reactivation_uv(struct xpc_partition *part)
-{
- xpc_send_local_activate_IRQ_uv(part, XPC_P_ASR_ACTIVATE_UV);
-}
-
-static void
-xpc_request_partition_deactivation_uv(struct xpc_partition *part)
-{
- struct xpc_activate_mq_msg_deactivate_req_uv msg;
-
- /*
- * ??? Is it a good idea to make this conditional on what is
- * ??? potentially stale state information?
- */
- if (part->sn.uv.remote_act_state != XPC_P_AS_DEACTIVATING &&
- part->sn.uv.remote_act_state != XPC_P_AS_INACTIVE) {
-
- msg.reason = part->reason;
- xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg),
- XPC_ACTIVATE_MQ_MSG_DEACTIVATE_REQ_UV);
- }
-}
-
-static void
-xpc_cancel_partition_deactivation_request_uv(struct xpc_partition *part)
-{
- /* nothing needs to be done */
- return;
-}
-
-static void
-xpc_init_fifo_uv(struct xpc_fifo_head_uv *head)
-{
- head->first = NULL;
- head->last = NULL;
- spin_lock_init(&head->lock);
- head->n_entries = 0;
-}
-
-static void *
-xpc_get_fifo_entry_uv(struct xpc_fifo_head_uv *head)
-{
- unsigned long irq_flags;
- struct xpc_fifo_entry_uv *first;
-
- spin_lock_irqsave(&head->lock, irq_flags);
- first = head->first;
- if (head->first != NULL) {
- head->first = first->next;
- if (head->first == NULL)
- head->last = NULL;
-
- head->n_entries--;
- BUG_ON(head->n_entries < 0);
-
- first->next = NULL;
- }
- spin_unlock_irqrestore(&head->lock, irq_flags);
- return first;
-}
-
-static void
-xpc_put_fifo_entry_uv(struct xpc_fifo_head_uv *head,
- struct xpc_fifo_entry_uv *last)
-{
- unsigned long irq_flags;
-
- last->next = NULL;
- spin_lock_irqsave(&head->lock, irq_flags);
- if (head->last != NULL)
- head->last->next = last;
- else
- head->first = last;
- head->last = last;
- head->n_entries++;
- spin_unlock_irqrestore(&head->lock, irq_flags);
-}
-
-static int
-xpc_n_of_fifo_entries_uv(struct xpc_fifo_head_uv *head)
-{
- return head->n_entries;
-}
-
-/*
- * Setup the channel structures that are uv specific.
- */
-static enum xp_retval
-xpc_setup_ch_structures_uv(struct xpc_partition *part)
-{
- struct xpc_channel_uv *ch_uv;
- int ch_number;
-
- for (ch_number = 0; ch_number < part->nchannels; ch_number++) {
- ch_uv = &part->channels[ch_number].sn.uv;
-
- xpc_init_fifo_uv(&ch_uv->msg_slot_free_list);
- xpc_init_fifo_uv(&ch_uv->recv_msg_list);
- }
-
- return xpSuccess;
-}
-
-/*
- * Teardown the channel structures that are uv specific.
- */
-static void
-xpc_teardown_ch_structures_uv(struct xpc_partition *part)
-{
- /* nothing needs to be done */
- return;
-}
-
-static enum xp_retval
-xpc_make_first_contact_uv(struct xpc_partition *part)
-{
- struct xpc_activate_mq_msg_uv msg;
-
- /*
- * We send a sync msg to get the remote partition's remote_act_state
- * updated to our current act_state which at this point should
- * be XPC_P_AS_ACTIVATING.
- */
- xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg),
- XPC_ACTIVATE_MQ_MSG_SYNC_ACT_STATE_UV);
-
- while (!((part->sn.uv.remote_act_state == XPC_P_AS_ACTIVATING) ||
- (part->sn.uv.remote_act_state == XPC_P_AS_ACTIVE))) {
-
- dev_dbg(xpc_part, "waiting to make first contact with "
- "partition %d\n", XPC_PARTID(part));
-
- /* wait a 1/4 of a second or so */
- (void)msleep_interruptible(250);
-
- if (part->act_state == XPC_P_AS_DEACTIVATING)
- return part->reason;
- }
-
- return xpSuccess;
-}
-
-static u64
-xpc_get_chctl_all_flags_uv(struct xpc_partition *part)
-{
- unsigned long irq_flags;
- union xpc_channel_ctl_flags chctl;
-
- spin_lock_irqsave(&part->chctl_lock, irq_flags);
- chctl = part->chctl;
- if (chctl.all_flags != 0)
- part->chctl.all_flags = 0;
-
- spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
- return chctl.all_flags;
-}
-
-static enum xp_retval
-xpc_allocate_send_msg_slot_uv(struct xpc_channel *ch)
-{
- struct xpc_channel_uv *ch_uv = &ch->sn.uv;
- struct xpc_send_msg_slot_uv *msg_slot;
- unsigned long irq_flags;
- int nentries;
- int entry;
- size_t nbytes;
-
- for (nentries = ch->local_nentries; nentries > 0; nentries--) {
- nbytes = nentries * sizeof(struct xpc_send_msg_slot_uv);
- ch_uv->send_msg_slots = kzalloc(nbytes, GFP_KERNEL);
- if (ch_uv->send_msg_slots == NULL)
- continue;
-
- for (entry = 0; entry < nentries; entry++) {
- msg_slot = &ch_uv->send_msg_slots[entry];
-
- msg_slot->msg_slot_number = entry;
- xpc_put_fifo_entry_uv(&ch_uv->msg_slot_free_list,
- &msg_slot->next);
- }
-
- spin_lock_irqsave(&ch->lock, irq_flags);
- if (nentries < ch->local_nentries)
- ch->local_nentries = nentries;
- spin_unlock_irqrestore(&ch->lock, irq_flags);
- return xpSuccess;
- }
-
- return xpNoMemory;
-}
-
-static enum xp_retval
-xpc_allocate_recv_msg_slot_uv(struct xpc_channel *ch)
-{
- struct xpc_channel_uv *ch_uv = &ch->sn.uv;
- struct xpc_notify_mq_msg_uv *msg_slot;
- unsigned long irq_flags;
- int nentries;
- int entry;
- size_t nbytes;
-
- for (nentries = ch->remote_nentries; nentries > 0; nentries--) {
- nbytes = nentries * ch->entry_size;
- ch_uv->recv_msg_slots = kzalloc(nbytes, GFP_KERNEL);
- if (ch_uv->recv_msg_slots == NULL)
- continue;
-
- for (entry = 0; entry < nentries; entry++) {
- msg_slot = ch_uv->recv_msg_slots +
- entry * ch->entry_size;
-
- msg_slot->hdr.msg_slot_number = entry;
- }
-
- spin_lock_irqsave(&ch->lock, irq_flags);
- if (nentries < ch->remote_nentries)
- ch->remote_nentries = nentries;
- spin_unlock_irqrestore(&ch->lock, irq_flags);
- return xpSuccess;
- }
-
- return xpNoMemory;
-}
-
-/*
- * Allocate msg_slots associated with the channel.
- */
-static enum xp_retval
-xpc_setup_msg_structures_uv(struct xpc_channel *ch)
-{
- static enum xp_retval ret;
- struct xpc_channel_uv *ch_uv = &ch->sn.uv;
-
- DBUG_ON(ch->flags & XPC_C_SETUP);
-
- ch_uv->cached_notify_gru_mq_desc = kmalloc_obj(struct gru_message_queue_desc);
- if (ch_uv->cached_notify_gru_mq_desc == NULL)
- return xpNoMemory;
-
- ret = xpc_allocate_send_msg_slot_uv(ch);
- if (ret == xpSuccess) {
-
- ret = xpc_allocate_recv_msg_slot_uv(ch);
- if (ret != xpSuccess) {
- kfree(ch_uv->send_msg_slots);
- xpc_init_fifo_uv(&ch_uv->msg_slot_free_list);
- }
- }
- return ret;
-}
-
-/*
- * Free up msg_slots and clear other stuff that were setup for the specified
- * channel.
- */
-static void
-xpc_teardown_msg_structures_uv(struct xpc_channel *ch)
-{
- struct xpc_channel_uv *ch_uv = &ch->sn.uv;
-
- lockdep_assert_held(&ch->lock);
-
- kfree(ch_uv->cached_notify_gru_mq_desc);
- ch_uv->cached_notify_gru_mq_desc = NULL;
-
- if (ch->flags & XPC_C_SETUP) {
- xpc_init_fifo_uv(&ch_uv->msg_slot_free_list);
- kfree(ch_uv->send_msg_slots);
- xpc_init_fifo_uv(&ch_uv->recv_msg_list);
- kfree(ch_uv->recv_msg_slots);
- }
-}
-
-static void
-xpc_send_chctl_closerequest_uv(struct xpc_channel *ch, unsigned long *irq_flags)
-{
- struct xpc_activate_mq_msg_chctl_closerequest_uv msg;
-
- msg.ch_number = ch->number;
- msg.reason = ch->reason;
- xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg),
- XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREQUEST_UV);
-}
-
-static void
-xpc_send_chctl_closereply_uv(struct xpc_channel *ch, unsigned long *irq_flags)
-{
- struct xpc_activate_mq_msg_chctl_closereply_uv msg;
-
- msg.ch_number = ch->number;
- xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg),
- XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREPLY_UV);
-}
-
-static void
-xpc_send_chctl_openrequest_uv(struct xpc_channel *ch, unsigned long *irq_flags)
-{
- struct xpc_activate_mq_msg_chctl_openrequest_uv msg;
-
- msg.ch_number = ch->number;
- msg.entry_size = ch->entry_size;
- msg.local_nentries = ch->local_nentries;
- xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg),
- XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREQUEST_UV);
-}
-
-static void
-xpc_send_chctl_openreply_uv(struct xpc_channel *ch, unsigned long *irq_flags)
-{
- struct xpc_activate_mq_msg_chctl_openreply_uv msg;
-
- msg.ch_number = ch->number;
- msg.local_nentries = ch->local_nentries;
- msg.remote_nentries = ch->remote_nentries;
- msg.notify_gru_mq_desc_gpa = uv_gpa(xpc_notify_mq_uv->gru_mq_desc);
- xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg),
- XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREPLY_UV);
-}
-
-static void
-xpc_send_chctl_opencomplete_uv(struct xpc_channel *ch, unsigned long *irq_flags)
-{
- struct xpc_activate_mq_msg_chctl_opencomplete_uv msg;
-
- msg.ch_number = ch->number;
- xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg),
- XPC_ACTIVATE_MQ_MSG_CHCTL_OPENCOMPLETE_UV);
-}
-
-static void
-xpc_send_chctl_local_msgrequest_uv(struct xpc_partition *part, int ch_number)
-{
- unsigned long irq_flags;
-
- spin_lock_irqsave(&part->chctl_lock, irq_flags);
- part->chctl.flags[ch_number] |= XPC_CHCTL_MSGREQUEST;
- spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
-
- xpc_wakeup_channel_mgr(part);
-}
-
-static enum xp_retval
-xpc_save_remote_msgqueue_pa_uv(struct xpc_channel *ch,
- unsigned long gru_mq_desc_gpa)
-{
- struct xpc_channel_uv *ch_uv = &ch->sn.uv;
-
- DBUG_ON(ch_uv->cached_notify_gru_mq_desc == NULL);
- return xpc_cache_remote_gru_mq_desc_uv(ch_uv->cached_notify_gru_mq_desc,
- gru_mq_desc_gpa);
-}
-
-static void
-xpc_indicate_partition_engaged_uv(struct xpc_partition *part)
-{
- struct xpc_activate_mq_msg_uv msg;
-
- xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg),
- XPC_ACTIVATE_MQ_MSG_MARK_ENGAGED_UV);
-}
-
-static void
-xpc_indicate_partition_disengaged_uv(struct xpc_partition *part)
-{
- struct xpc_activate_mq_msg_uv msg;
-
- xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg),
- XPC_ACTIVATE_MQ_MSG_MARK_DISENGAGED_UV);
-}
-
-static void
-xpc_assume_partition_disengaged_uv(short partid)
-{
- struct xpc_partition_uv *part_uv = &xpc_partitions[partid].sn.uv;
- unsigned long irq_flags;
-
- spin_lock_irqsave(&part_uv->flags_lock, irq_flags);
- part_uv->flags &= ~XPC_P_ENGAGED_UV;
- spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags);
-}
-
-static int
-xpc_partition_engaged_uv(short partid)
-{
- return (xpc_partitions[partid].sn.uv.flags & XPC_P_ENGAGED_UV) != 0;
-}
-
-static int
-xpc_any_partition_engaged_uv(void)
-{
- struct xpc_partition_uv *part_uv;
- short partid;
-
- for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) {
- part_uv = &xpc_partitions[partid].sn.uv;
- if ((part_uv->flags & XPC_P_ENGAGED_UV) != 0)
- return 1;
- }
- return 0;
-}
-
-static enum xp_retval
-xpc_allocate_msg_slot_uv(struct xpc_channel *ch, u32 flags,
- struct xpc_send_msg_slot_uv **address_of_msg_slot)
-{
- enum xp_retval ret;
- struct xpc_send_msg_slot_uv *msg_slot;
- struct xpc_fifo_entry_uv *entry;
-
- while (1) {
- entry = xpc_get_fifo_entry_uv(&ch->sn.uv.msg_slot_free_list);
- if (entry != NULL)
- break;
-
- if (flags & XPC_NOWAIT)
- return xpNoWait;
-
- ret = xpc_allocate_msg_wait(ch);
- if (ret != xpInterrupted && ret != xpTimeout)
- return ret;
- }
-
- msg_slot = container_of(entry, struct xpc_send_msg_slot_uv, next);
- *address_of_msg_slot = msg_slot;
- return xpSuccess;
-}
-
-static void
-xpc_free_msg_slot_uv(struct xpc_channel *ch,
- struct xpc_send_msg_slot_uv *msg_slot)
-{
- xpc_put_fifo_entry_uv(&ch->sn.uv.msg_slot_free_list, &msg_slot->next);
-
- /* wakeup anyone waiting for a free msg slot */
- if (atomic_read(&ch->n_on_msg_allocate_wq) > 0)
- wake_up(&ch->msg_allocate_wq);
-}
-
-static void
-xpc_notify_sender_uv(struct xpc_channel *ch,
- struct xpc_send_msg_slot_uv *msg_slot,
- enum xp_retval reason)
-{
- xpc_notify_func func = msg_slot->func;
-
- if (func != NULL && cmpxchg(&msg_slot->func, func, NULL) == func) {
-
- atomic_dec(&ch->n_to_notify);
-
- dev_dbg(xpc_chan, "msg_slot->func() called, msg_slot=0x%p "
- "msg_slot_number=%d partid=%d channel=%d\n", msg_slot,
- msg_slot->msg_slot_number, ch->partid, ch->number);
-
- func(reason, ch->partid, ch->number, msg_slot->key);
-
- dev_dbg(xpc_chan, "msg_slot->func() returned, msg_slot=0x%p "
- "msg_slot_number=%d partid=%d channel=%d\n", msg_slot,
- msg_slot->msg_slot_number, ch->partid, ch->number);
- }
-}
-
-static void
-xpc_handle_notify_mq_ack_uv(struct xpc_channel *ch,
- struct xpc_notify_mq_msg_uv *msg)
-{
- struct xpc_send_msg_slot_uv *msg_slot;
- int entry = msg->hdr.msg_slot_number % ch->local_nentries;
-
- msg_slot = &ch->sn.uv.send_msg_slots[entry];
-
- BUG_ON(msg_slot->msg_slot_number != msg->hdr.msg_slot_number);
- msg_slot->msg_slot_number += ch->local_nentries;
-
- if (msg_slot->func != NULL)
- xpc_notify_sender_uv(ch, msg_slot, xpMsgDelivered);
-
- xpc_free_msg_slot_uv(ch, msg_slot);
-}
-
-static void
-xpc_handle_notify_mq_msg_uv(struct xpc_partition *part,
- struct xpc_notify_mq_msg_uv *msg)
-{
- struct xpc_partition_uv *part_uv = &part->sn.uv;
- struct xpc_channel *ch;
- struct xpc_channel_uv *ch_uv;
- struct xpc_notify_mq_msg_uv *msg_slot;
- unsigned long irq_flags;
- int ch_number = msg->hdr.ch_number;
-
- if (unlikely(ch_number >= part->nchannels)) {
- dev_err(xpc_part, "xpc_handle_notify_IRQ_uv() received invalid "
- "channel number=0x%x in message from partid=%d\n",
- ch_number, XPC_PARTID(part));
-
- /* get hb checker to deactivate from the remote partition */
- spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
- if (part_uv->act_state_req == 0)
- xpc_activate_IRQ_rcvd++;
- part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV;
- part_uv->reason = xpBadChannelNumber;
- spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
-
- wake_up_interruptible(&xpc_activate_IRQ_wq);
- return;
- }
-
- ch = &part->channels[ch_number];
- xpc_msgqueue_ref(ch);
-
- if (!(ch->flags & XPC_C_CONNECTED)) {
- xpc_msgqueue_deref(ch);
- return;
- }
-
- /* see if we're really dealing with an ACK for a previously sent msg */
- if (msg->hdr.size == 0) {
- xpc_handle_notify_mq_ack_uv(ch, msg);
- xpc_msgqueue_deref(ch);
- return;
- }
-
- /* we're dealing with a normal message sent via the notify_mq */
- ch_uv = &ch->sn.uv;
-
- msg_slot = ch_uv->recv_msg_slots +
- (msg->hdr.msg_slot_number % ch->remote_nentries) * ch->entry_size;
-
- BUG_ON(msg_slot->hdr.size != 0);
-
- memcpy(msg_slot, msg, msg->hdr.size);
-
- xpc_put_fifo_entry_uv(&ch_uv->recv_msg_list, &msg_slot->hdr.u.next);
-
- if (ch->flags & XPC_C_CONNECTEDCALLOUT_MADE) {
- /*
- * If there is an existing idle kthread get it to deliver
- * the payload, otherwise we'll have to get the channel mgr
- * for this partition to create a kthread to do the delivery.
- */
- if (atomic_read(&ch->kthreads_idle) > 0)
- wake_up_nr(&ch->idle_wq, 1);
- else
- xpc_send_chctl_local_msgrequest_uv(part, ch->number);
- }
- xpc_msgqueue_deref(ch);
-}
-
-static irqreturn_t
-xpc_handle_notify_IRQ_uv(int irq, void *dev_id)
-{
- struct xpc_notify_mq_msg_uv *msg;
- short partid;
- struct xpc_partition *part;
-
- while ((msg = gru_get_next_message(xpc_notify_mq_uv->gru_mq_desc)) !=
- NULL) {
-
- partid = msg->hdr.partid;
- if (partid < 0 || partid >= XP_MAX_NPARTITIONS_UV) {
- dev_err(xpc_part, "xpc_handle_notify_IRQ_uv() received "
- "invalid partid=0x%x in message\n", partid);
- } else {
- part = &xpc_partitions[partid];
-
- if (xpc_part_ref(part)) {
- xpc_handle_notify_mq_msg_uv(part, msg);
- xpc_part_deref(part);
- }
- }
-
- gru_free_message(xpc_notify_mq_uv->gru_mq_desc, msg);
- }
-
- return IRQ_HANDLED;
-}
-
-static int
-xpc_n_of_deliverable_payloads_uv(struct xpc_channel *ch)
-{
- return xpc_n_of_fifo_entries_uv(&ch->sn.uv.recv_msg_list);
-}
-
-static void
-xpc_process_msg_chctl_flags_uv(struct xpc_partition *part, int ch_number)
-{
- struct xpc_channel *ch = &part->channels[ch_number];
- int ndeliverable_payloads;
-
- xpc_msgqueue_ref(ch);
-
- ndeliverable_payloads = xpc_n_of_deliverable_payloads_uv(ch);
-
- if (ndeliverable_payloads > 0 &&
- (ch->flags & XPC_C_CONNECTED) &&
- (ch->flags & XPC_C_CONNECTEDCALLOUT_MADE)) {
-
- xpc_activate_kthreads(ch, ndeliverable_payloads);
- }
-
- xpc_msgqueue_deref(ch);
-}
-
-static enum xp_retval
-xpc_send_payload_uv(struct xpc_channel *ch, u32 flags, void *payload,
- u16 payload_size, u8 notify_type, xpc_notify_func func,
- void *key)
-{
- enum xp_retval ret = xpSuccess;
- struct xpc_send_msg_slot_uv *msg_slot = NULL;
- struct xpc_notify_mq_msg_uv *msg;
- u8 msg_buffer[XPC_NOTIFY_MSG_SIZE_UV];
- size_t msg_size;
-
- DBUG_ON(notify_type != XPC_N_CALL);
-
- msg_size = sizeof(struct xpc_notify_mq_msghdr_uv) + payload_size;
- if (msg_size > ch->entry_size)
- return xpPayloadTooBig;
-
- xpc_msgqueue_ref(ch);
-
- if (ch->flags & XPC_C_DISCONNECTING) {
- ret = ch->reason;
- goto out_1;
- }
- if (!(ch->flags & XPC_C_CONNECTED)) {
- ret = xpNotConnected;
- goto out_1;
- }
-
- ret = xpc_allocate_msg_slot_uv(ch, flags, &msg_slot);
- if (ret != xpSuccess)
- goto out_1;
-
- if (func != NULL) {
- atomic_inc(&ch->n_to_notify);
-
- msg_slot->key = key;
- smp_wmb(); /* a non-NULL func must hit memory after the key */
- msg_slot->func = func;
-
- if (ch->flags & XPC_C_DISCONNECTING) {
- ret = ch->reason;
- goto out_2;
- }
- }
-
- msg = (struct xpc_notify_mq_msg_uv *)&msg_buffer;
- msg->hdr.partid = xp_partition_id;
- msg->hdr.ch_number = ch->number;
- msg->hdr.size = msg_size;
- msg->hdr.msg_slot_number = msg_slot->msg_slot_number;
- memcpy(&msg->payload, payload, payload_size);
-
- ret = xpc_send_gru_msg(ch->sn.uv.cached_notify_gru_mq_desc, msg,
- msg_size);
- if (ret == xpSuccess)
- goto out_1;
-
- XPC_DEACTIVATE_PARTITION(&xpc_partitions[ch->partid], ret);
-out_2:
- if (func != NULL) {
- /*
- * Try to NULL the msg_slot's func field. If we fail, then
- * xpc_notify_senders_of_disconnect_uv() beat us to it, in which
- * case we need to pretend we succeeded to send the message
- * since the user will get a callout for the disconnect error
- * by xpc_notify_senders_of_disconnect_uv(), and to also get an
- * error returned here will confuse them. Additionally, since
- * in this case the channel is being disconnected we don't need
- * to put the msg_slot back on the free list.
- */
- if (cmpxchg(&msg_slot->func, func, NULL) != func) {
- ret = xpSuccess;
- goto out_1;
- }
-
- msg_slot->key = NULL;
- atomic_dec(&ch->n_to_notify);
- }
- xpc_free_msg_slot_uv(ch, msg_slot);
-out_1:
- xpc_msgqueue_deref(ch);
- return ret;
-}
-
-/*
- * Tell the callers of xpc_send_notify() that the status of their payloads
- * is unknown because the channel is now disconnecting.
- *
- * We don't worry about putting these msg_slots on the free list since the
- * msg_slots themselves are about to be kfree'd.
- */
-static void
-xpc_notify_senders_of_disconnect_uv(struct xpc_channel *ch)
-{
- struct xpc_send_msg_slot_uv *msg_slot;
- int entry;
-
- DBUG_ON(!(ch->flags & XPC_C_DISCONNECTING));
-
- for (entry = 0; entry < ch->local_nentries; entry++) {
-
- if (atomic_read(&ch->n_to_notify) == 0)
- break;
-
- msg_slot = &ch->sn.uv.send_msg_slots[entry];
- if (msg_slot->func != NULL)
- xpc_notify_sender_uv(ch, msg_slot, ch->reason);
- }
-}
-
-/*
- * Get the next deliverable message's payload.
- */
-static void *
-xpc_get_deliverable_payload_uv(struct xpc_channel *ch)
-{
- struct xpc_fifo_entry_uv *entry;
- struct xpc_notify_mq_msg_uv *msg;
- void *payload = NULL;
-
- if (!(ch->flags & XPC_C_DISCONNECTING)) {
- entry = xpc_get_fifo_entry_uv(&ch->sn.uv.recv_msg_list);
- if (entry != NULL) {
- msg = container_of(entry, struct xpc_notify_mq_msg_uv,
- hdr.u.next);
- payload = &msg->payload;
- }
- }
- return payload;
-}
-
-static void
-xpc_received_payload_uv(struct xpc_channel *ch, void *payload)
-{
- struct xpc_notify_mq_msg_uv *msg;
- enum xp_retval ret;
-
- msg = container_of(payload, struct xpc_notify_mq_msg_uv, payload);
-
- /* return an ACK to the sender of this message */
-
- msg->hdr.partid = xp_partition_id;
- msg->hdr.size = 0; /* size of zero indicates this is an ACK */
-
- ret = xpc_send_gru_msg(ch->sn.uv.cached_notify_gru_mq_desc, msg,
- sizeof(struct xpc_notify_mq_msghdr_uv));
- if (ret != xpSuccess)
- XPC_DEACTIVATE_PARTITION(&xpc_partitions[ch->partid], ret);
-}
-
-static const struct xpc_arch_operations xpc_arch_ops_uv = {
- .setup_partitions = xpc_setup_partitions_uv,
- .teardown_partitions = xpc_teardown_partitions_uv,
- .process_activate_IRQ_rcvd = xpc_process_activate_IRQ_rcvd_uv,
- .get_partition_rsvd_page_pa = xpc_get_partition_rsvd_page_pa_uv,
- .setup_rsvd_page = xpc_setup_rsvd_page_uv,
-
- .allow_hb = xpc_allow_hb_uv,
- .disallow_hb = xpc_disallow_hb_uv,
- .disallow_all_hbs = xpc_disallow_all_hbs_uv,
- .increment_heartbeat = xpc_increment_heartbeat_uv,
- .offline_heartbeat = xpc_offline_heartbeat_uv,
- .online_heartbeat = xpc_online_heartbeat_uv,
- .heartbeat_init = xpc_heartbeat_init_uv,
- .heartbeat_exit = xpc_heartbeat_exit_uv,
- .get_remote_heartbeat = xpc_get_remote_heartbeat_uv,
-
- .request_partition_activation =
- xpc_request_partition_activation_uv,
- .request_partition_reactivation =
- xpc_request_partition_reactivation_uv,
- .request_partition_deactivation =
- xpc_request_partition_deactivation_uv,
- .cancel_partition_deactivation_request =
- xpc_cancel_partition_deactivation_request_uv,
-
- .setup_ch_structures = xpc_setup_ch_structures_uv,
- .teardown_ch_structures = xpc_teardown_ch_structures_uv,
-
- .make_first_contact = xpc_make_first_contact_uv,
-
- .get_chctl_all_flags = xpc_get_chctl_all_flags_uv,
- .send_chctl_closerequest = xpc_send_chctl_closerequest_uv,
- .send_chctl_closereply = xpc_send_chctl_closereply_uv,
- .send_chctl_openrequest = xpc_send_chctl_openrequest_uv,
- .send_chctl_openreply = xpc_send_chctl_openreply_uv,
- .send_chctl_opencomplete = xpc_send_chctl_opencomplete_uv,
- .process_msg_chctl_flags = xpc_process_msg_chctl_flags_uv,
-
- .save_remote_msgqueue_pa = xpc_save_remote_msgqueue_pa_uv,
-
- .setup_msg_structures = xpc_setup_msg_structures_uv,
- .teardown_msg_structures = xpc_teardown_msg_structures_uv,
-
- .indicate_partition_engaged = xpc_indicate_partition_engaged_uv,
- .indicate_partition_disengaged = xpc_indicate_partition_disengaged_uv,
- .assume_partition_disengaged = xpc_assume_partition_disengaged_uv,
- .partition_engaged = xpc_partition_engaged_uv,
- .any_partition_engaged = xpc_any_partition_engaged_uv,
-
- .n_of_deliverable_payloads = xpc_n_of_deliverable_payloads_uv,
- .send_payload = xpc_send_payload_uv,
- .get_deliverable_payload = xpc_get_deliverable_payload_uv,
- .received_payload = xpc_received_payload_uv,
- .notify_senders_of_disconnect = xpc_notify_senders_of_disconnect_uv,
-};
-
-static int
-xpc_init_mq_node(int nid)
-{
- int cpu;
-
- cpus_read_lock();
-
- for_each_cpu(cpu, cpumask_of_node(nid)) {
- xpc_activate_mq_uv =
- xpc_create_gru_mq_uv(XPC_ACTIVATE_MQ_SIZE_UV, nid,
- XPC_ACTIVATE_IRQ_NAME,
- xpc_handle_activate_IRQ_uv);
- if (!IS_ERR(xpc_activate_mq_uv))
- break;
- }
- if (IS_ERR(xpc_activate_mq_uv)) {
- cpus_read_unlock();
- return PTR_ERR(xpc_activate_mq_uv);
- }
-
- for_each_cpu(cpu, cpumask_of_node(nid)) {
- xpc_notify_mq_uv =
- xpc_create_gru_mq_uv(XPC_NOTIFY_MQ_SIZE_UV, nid,
- XPC_NOTIFY_IRQ_NAME,
- xpc_handle_notify_IRQ_uv);
- if (!IS_ERR(xpc_notify_mq_uv))
- break;
- }
- if (IS_ERR(xpc_notify_mq_uv)) {
- xpc_destroy_gru_mq_uv(xpc_activate_mq_uv);
- cpus_read_unlock();
- return PTR_ERR(xpc_notify_mq_uv);
- }
-
- cpus_read_unlock();
- return 0;
-}
-
-int
-xpc_init_uv(void)
-{
- int nid;
- int ret = 0;
-
- xpc_arch_ops = xpc_arch_ops_uv;
-
- if (sizeof(struct xpc_notify_mq_msghdr_uv) > XPC_MSG_HDR_MAX_SIZE) {
- dev_err(xpc_part, "xpc_notify_mq_msghdr_uv is larger than %d\n",
- XPC_MSG_HDR_MAX_SIZE);
- return -E2BIG;
- }
-
- if (xpc_mq_node < 0)
- for_each_online_node(nid) {
- ret = xpc_init_mq_node(nid);
-
- if (!ret)
- break;
- }
- else
- ret = xpc_init_mq_node(xpc_mq_node);
-
- if (ret < 0)
- dev_err(xpc_part, "xpc_init_mq_node() returned error=%d\n",
- -ret);
-
- return ret;
-}
-
-void
-xpc_exit_uv(void)
-{
- xpc_destroy_gru_mq_uv(xpc_notify_mq_uv);
- xpc_destroy_gru_mq_uv(xpc_activate_mq_uv);
-}
-
-module_param(xpc_mq_node, int, 0);
-MODULE_PARM_DESC(xpc_mq_node, "Node number on which to allocate message queues.");
diff --git a/drivers/misc/sgi-xp/xpnet.c b/drivers/misc/sgi-xp/xpnet.c
deleted file mode 100644
index 1533b72d57b1..000000000000
--- a/drivers/misc/sgi-xp/xpnet.c
+++ /dev/null
@@ -1,599 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * (C) Copyright 2020 Hewlett Packard Enterprise Development LP
- * Copyright (C) 1999-2009 Silicon Graphics, Inc. All rights reserved.
- */
-
-/*
- * Cross Partition Network Interface (XPNET) support
- *
- * XPNET provides a virtual network layered on top of the Cross
- * Partition communication layer.
- *
- * XPNET provides direct point-to-point and broadcast-like support
- * for an ethernet-like device. The ethernet broadcast medium is
- * replaced with a point-to-point message structure which passes
- * pointers to a DMA-capable block that a remote partition should
- * retrieve and pass to the upper level networking layer.
- *
- */
-
-#include <linux/slab.h>
-#include <linux/module.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include "xp.h"
-
-/*
- * The message payload transferred by XPC.
- *
- * buf_pa is the physical address where the DMA should pull from.
- *
- * NOTE: for performance reasons, buf_pa should _ALWAYS_ begin on a
- * cacheline boundary. To accomplish this, we record the number of
- * bytes from the beginning of the first cacheline to the first useful
- * byte of the skb (leadin_ignore) and the number of bytes from the
- * last useful byte of the skb to the end of the last cacheline
- * (tailout_ignore).
- *
- * size is the number of bytes to transfer which includes the skb->len
- * (useful bytes of the senders skb) plus the leadin and tailout
- */
-struct xpnet_message {
- u16 version; /* Version for this message */
- u16 embedded_bytes; /* #of bytes embedded in XPC message */
- u32 magic; /* Special number indicating this is xpnet */
- unsigned long buf_pa; /* phys address of buffer to retrieve */
- u32 size; /* #of bytes in buffer */
- u8 leadin_ignore; /* #of bytes to ignore at the beginning */
- u8 tailout_ignore; /* #of bytes to ignore at the end */
- unsigned char data; /* body of small packets */
-};
-
-/*
- * Determine the size of our message, the cacheline aligned size,
- * and then the number of message will request from XPC.
- *
- * XPC expects each message to exist in an individual cacheline.
- */
-#define XPNET_MSG_SIZE XPC_MSG_PAYLOAD_MAX_SIZE
-#define XPNET_MSG_DATA_MAX \
- (XPNET_MSG_SIZE - offsetof(struct xpnet_message, data))
-#define XPNET_MSG_NENTRIES (PAGE_SIZE / XPC_MSG_MAX_SIZE)
-
-#define XPNET_MAX_KTHREADS (XPNET_MSG_NENTRIES + 1)
-#define XPNET_MAX_IDLE_KTHREADS (XPNET_MSG_NENTRIES + 1)
-
-/*
- * Version number of XPNET implementation. XPNET can always talk to versions
- * with same major #, and never talk to versions with a different version.
- */
-#define _XPNET_VERSION(_major, _minor) (((_major) << 4) | (_minor))
-#define XPNET_VERSION_MAJOR(_v) ((_v) >> 4)
-#define XPNET_VERSION_MINOR(_v) ((_v) & 0xf)
-
-#define XPNET_VERSION _XPNET_VERSION(1, 0) /* version 1.0 */
-#define XPNET_VERSION_EMBED _XPNET_VERSION(1, 1) /* version 1.1 */
-#define XPNET_MAGIC 0x88786984 /* "XNET" */
-
-#define XPNET_VALID_MSG(_m) \
- ((XPNET_VERSION_MAJOR(_m->version) == XPNET_VERSION_MAJOR(XPNET_VERSION)) \
- && (msg->magic == XPNET_MAGIC))
-
-#define XPNET_DEVICE_NAME "xp0"
-
-/*
- * When messages are queued with xpc_send_notify, a kmalloc'd buffer
- * of the following type is passed as a notification cookie. When the
- * notification function is called, we use the cookie to decide
- * whether all outstanding message sends have completed. The skb can
- * then be released.
- */
-struct xpnet_pending_msg {
- struct sk_buff *skb;
- atomic_t use_count;
-};
-
-static struct net_device *xpnet_device;
-
-/*
- * When we are notified of other partitions activating, we add them to
- * our bitmask of partitions to which we broadcast.
- */
-static unsigned long *xpnet_broadcast_partitions;
-/* protect above */
-static DEFINE_SPINLOCK(xpnet_broadcast_lock);
-
-/*
- * Since the Block Transfer Engine (BTE) is being used for the transfer
- * and it relies upon cache-line size transfers, we need to reserve at
- * least one cache-line for head and tail alignment. The BTE is
- * limited to 8MB transfers.
- *
- * Testing has shown that changing MTU to greater than 64KB has no effect
- * on TCP as the two sides negotiate a Max Segment Size that is limited
- * to 64K. Other protocols May use packets greater than this, but for
- * now, the default is 64KB.
- */
-#define XPNET_MAX_MTU (0x800000UL - L1_CACHE_BYTES)
-/* 68 comes from min TCP+IP+MAC header */
-#define XPNET_MIN_MTU 68
-/* 32KB has been determined to be the ideal */
-#define XPNET_DEF_MTU (0x8000UL)
-
-/*
- * The partid is encapsulated in the MAC address beginning in the following
- * octet and it consists of two octets.
- */
-#define XPNET_PARTID_OCTET 2
-
-/* Define the XPNET debug device structures to be used with dev_dbg() et al */
-
-static struct device_driver xpnet_dbg_name = {
- .name = "xpnet"
-};
-
-static struct device xpnet_dbg_subname = {
- .init_name = "", /* set to "" */
- .driver = &xpnet_dbg_name
-};
-
-static struct device *xpnet = &xpnet_dbg_subname;
-
-/*
- * Packet was recevied by XPC and forwarded to us.
- */
-static void
-xpnet_receive(short partid, int channel, struct xpnet_message *msg)
-{
- struct sk_buff *skb;
- void *dst;
- enum xp_retval ret;
-
- if (!XPNET_VALID_MSG(msg)) {
- /*
- * Packet with a different XPC version. Ignore.
- */
- xpc_received(partid, channel, (void *)msg);
-
- xpnet_device->stats.rx_errors++;
-
- return;
- }
- dev_dbg(xpnet, "received 0x%lx, %d, %d, %d\n", msg->buf_pa, msg->size,
- msg->leadin_ignore, msg->tailout_ignore);
-
- /* reserve an extra cache line */
- skb = dev_alloc_skb(msg->size + L1_CACHE_BYTES);
- if (!skb) {
- dev_err(xpnet, "failed on dev_alloc_skb(%d)\n",
- msg->size + L1_CACHE_BYTES);
-
- xpc_received(partid, channel, (void *)msg);
-
- xpnet_device->stats.rx_errors++;
-
- return;
- }
-
- /*
- * The allocated skb has some reserved space.
- * In order to use xp_remote_memcpy(), we need to get the
- * skb->data pointer moved forward.
- */
- skb_reserve(skb, (L1_CACHE_BYTES - ((u64)skb->data &
- (L1_CACHE_BYTES - 1)) +
- msg->leadin_ignore));
-
- /*
- * Update the tail pointer to indicate data actually
- * transferred.
- */
- skb_put(skb, (msg->size - msg->leadin_ignore - msg->tailout_ignore));
-
- /*
- * Move the data over from the other side.
- */
- if ((XPNET_VERSION_MINOR(msg->version) == 1) &&
- (msg->embedded_bytes != 0)) {
- dev_dbg(xpnet, "copying embedded message. memcpy(0x%p, 0x%p, "
- "%lu)\n", skb->data, &msg->data,
- (size_t)msg->embedded_bytes);
-
- skb_copy_to_linear_data(skb, &msg->data,
- (size_t)msg->embedded_bytes);
- } else {
- dst = (void *)((u64)skb->data & ~(L1_CACHE_BYTES - 1));
- dev_dbg(xpnet, "transferring buffer to the skb->data area;\n\t"
- "xp_remote_memcpy(0x%p, 0x%p, %u)\n", dst,
- (void *)msg->buf_pa, msg->size);
-
- ret = xp_remote_memcpy(xp_pa(dst), msg->buf_pa, msg->size);
- if (ret != xpSuccess) {
- /*
- * !!! Need better way of cleaning skb. Currently skb
- * !!! appears in_use and we can't just call
- * !!! dev_kfree_skb.
- */
- dev_err(xpnet, "xp_remote_memcpy(0x%p, 0x%p, 0x%x) "
- "returned error=0x%x\n", dst,
- (void *)msg->buf_pa, msg->size, ret);
-
- xpc_received(partid, channel, (void *)msg);
-
- xpnet_device->stats.rx_errors++;
-
- return;
- }
- }
-
- dev_dbg(xpnet, "<skb->head=0x%p skb->data=0x%p skb->tail=0x%p "
- "skb->end=0x%p skb->len=%d\n", (void *)skb->head,
- (void *)skb->data, skb_tail_pointer(skb), skb_end_pointer(skb),
- skb->len);
-
- skb->protocol = eth_type_trans(skb, xpnet_device);
- skb->ip_summed = CHECKSUM_UNNECESSARY;
-
- dev_dbg(xpnet, "passing skb to network layer\n"
- "\tskb->head=0x%p skb->data=0x%p skb->tail=0x%p "
- "skb->end=0x%p skb->len=%d\n",
- (void *)skb->head, (void *)skb->data, skb_tail_pointer(skb),
- skb_end_pointer(skb), skb->len);
-
- xpnet_device->stats.rx_packets++;
- xpnet_device->stats.rx_bytes += skb->len + ETH_HLEN;
-
- netif_rx(skb);
- xpc_received(partid, channel, (void *)msg);
-}
-
-/*
- * This is the handler which XPC calls during any sort of change in
- * state or message reception on a connection.
- */
-static void
-xpnet_connection_activity(enum xp_retval reason, short partid, int channel,
- void *data, void *key)
-{
- DBUG_ON(partid < 0 || partid >= xp_max_npartitions);
- DBUG_ON(channel != XPC_NET_CHANNEL);
-
- switch (reason) {
- case xpMsgReceived: /* message received */
- DBUG_ON(data == NULL);
-
- xpnet_receive(partid, channel, (struct xpnet_message *)data);
- break;
-
- case xpConnected: /* connection completed to a partition */
- spin_lock_bh(&xpnet_broadcast_lock);
- __set_bit(partid, xpnet_broadcast_partitions);
- spin_unlock_bh(&xpnet_broadcast_lock);
-
- netif_carrier_on(xpnet_device);
-
- dev_dbg(xpnet, "%s connected to partition %d\n",
- xpnet_device->name, partid);
- break;
-
- default:
- spin_lock_bh(&xpnet_broadcast_lock);
- __clear_bit(partid, xpnet_broadcast_partitions);
- spin_unlock_bh(&xpnet_broadcast_lock);
-
- if (bitmap_empty(xpnet_broadcast_partitions,
- xp_max_npartitions)) {
- netif_carrier_off(xpnet_device);
- }
-
- dev_dbg(xpnet, "%s disconnected from partition %d\n",
- xpnet_device->name, partid);
- break;
- }
-}
-
-static int
-xpnet_dev_open(struct net_device *dev)
-{
- enum xp_retval ret;
-
- dev_dbg(xpnet, "calling xpc_connect(%d, 0x%p, NULL, %ld, %ld, %ld, "
- "%ld)\n", XPC_NET_CHANNEL, xpnet_connection_activity,
- (unsigned long)XPNET_MSG_SIZE,
- (unsigned long)XPNET_MSG_NENTRIES,
- (unsigned long)XPNET_MAX_KTHREADS,
- (unsigned long)XPNET_MAX_IDLE_KTHREADS);
-
- ret = xpc_connect(XPC_NET_CHANNEL, xpnet_connection_activity, NULL,
- XPNET_MSG_SIZE, XPNET_MSG_NENTRIES,
- XPNET_MAX_KTHREADS, XPNET_MAX_IDLE_KTHREADS);
- if (ret != xpSuccess) {
- dev_err(xpnet, "ifconfig up of %s failed on XPC connect, "
- "ret=%d\n", dev->name, ret);
-
- return -ENOMEM;
- }
-
- dev_dbg(xpnet, "ifconfig up of %s; XPC connected\n", dev->name);
-
- return 0;
-}
-
-static int
-xpnet_dev_stop(struct net_device *dev)
-{
- xpc_disconnect(XPC_NET_CHANNEL);
-
- dev_dbg(xpnet, "ifconfig down of %s; XPC disconnected\n", dev->name);
-
- return 0;
-}
-
-/*
- * Notification that the other end has received the message and
- * DMA'd the skb information. At this point, they are done with
- * our side. When all recipients are done processing, we
- * release the skb and then release our pending message structure.
- */
-static void
-xpnet_send_completed(enum xp_retval reason, short partid, int channel,
- void *__qm)
-{
- struct xpnet_pending_msg *queued_msg = (struct xpnet_pending_msg *)__qm;
-
- DBUG_ON(queued_msg == NULL);
-
- dev_dbg(xpnet, "message to %d notified with reason %d\n",
- partid, reason);
-
- if (atomic_dec_return(&queued_msg->use_count) == 0) {
- dev_dbg(xpnet, "all acks for skb->head=-x%p\n",
- (void *)queued_msg->skb->head);
-
- dev_kfree_skb_any(queued_msg->skb);
- kfree(queued_msg);
- }
-}
-
-static void
-xpnet_send(struct sk_buff *skb, struct xpnet_pending_msg *queued_msg,
- u64 start_addr, u64 end_addr, u16 embedded_bytes, int dest_partid)
-{
- u8 msg_buffer[XPNET_MSG_SIZE];
- struct xpnet_message *msg = (struct xpnet_message *)&msg_buffer;
- u16 msg_size = sizeof(struct xpnet_message);
- enum xp_retval ret;
-
- msg->embedded_bytes = embedded_bytes;
- if (unlikely(embedded_bytes != 0)) {
- msg->version = XPNET_VERSION_EMBED;
- dev_dbg(xpnet, "calling memcpy(0x%p, 0x%p, 0x%lx)\n",
- &msg->data, skb->data, (size_t)embedded_bytes);
- skb_copy_from_linear_data(skb, &msg->data,
- (size_t)embedded_bytes);
- msg_size += embedded_bytes - 1;
- } else {
- msg->version = XPNET_VERSION;
- }
- msg->magic = XPNET_MAGIC;
- msg->size = end_addr - start_addr;
- msg->leadin_ignore = (u64)skb->data - start_addr;
- msg->tailout_ignore = end_addr - (u64)skb_tail_pointer(skb);
- msg->buf_pa = xp_pa((void *)start_addr);
-
- dev_dbg(xpnet, "sending XPC message to %d:%d\n"
- "msg->buf_pa=0x%lx, msg->size=%u, "
- "msg->leadin_ignore=%u, msg->tailout_ignore=%u\n",
- dest_partid, XPC_NET_CHANNEL, msg->buf_pa, msg->size,
- msg->leadin_ignore, msg->tailout_ignore);
-
- atomic_inc(&queued_msg->use_count);
-
- ret = xpc_send_notify(dest_partid, XPC_NET_CHANNEL, XPC_NOWAIT, msg,
- msg_size, xpnet_send_completed, queued_msg);
- if (unlikely(ret != xpSuccess))
- atomic_dec(&queued_msg->use_count);
-}
-
-/*
- * Network layer has formatted a packet (skb) and is ready to place it
- * "on the wire". Prepare and send an xpnet_message to all partitions
- * which have connected with us and are targets of this packet.
- *
- * MAC-NOTE: For the XPNET driver, the MAC address contains the
- * destination partid. If the destination partid octets are 0xffff,
- * this packet is to be broadcast to all connected partitions.
- */
-static netdev_tx_t
-xpnet_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
-{
- struct xpnet_pending_msg *queued_msg;
- u64 start_addr, end_addr;
- short dest_partid;
- u16 embedded_bytes = 0;
-
- dev_dbg(xpnet, ">skb->head=0x%p skb->data=0x%p skb->tail=0x%p "
- "skb->end=0x%p skb->len=%d\n", (void *)skb->head,
- (void *)skb->data, skb_tail_pointer(skb), skb_end_pointer(skb),
- skb->len);
-
- if (skb->data[0] == 0x33) {
- dev_kfree_skb(skb);
- return NETDEV_TX_OK; /* nothing needed to be done */
- }
-
- /*
- * The xpnet_pending_msg tracks how many outstanding
- * xpc_send_notifies are relying on this skb. When none
- * remain, release the skb.
- */
- queued_msg = kmalloc_obj(struct xpnet_pending_msg, GFP_ATOMIC);
- if (queued_msg == NULL) {
- dev_warn(xpnet, "failed to kmalloc %ld bytes; dropping "
- "packet\n", sizeof(struct xpnet_pending_msg));
-
- dev->stats.tx_errors++;
- dev_kfree_skb(skb);
- return NETDEV_TX_OK;
- }
-
- /* get the beginning of the first cacheline and end of last */
- start_addr = ((u64)skb->data & ~(L1_CACHE_BYTES - 1));
- end_addr = L1_CACHE_ALIGN((u64)skb_tail_pointer(skb));
-
- /* calculate how many bytes to embed in the XPC message */
- if (unlikely(skb->len <= XPNET_MSG_DATA_MAX)) {
- /* skb->data does fit so embed */
- embedded_bytes = skb->len;
- }
-
- /*
- * Since the send occurs asynchronously, we set the count to one
- * and begin sending. Any sends that happen to complete before
- * we are done sending will not free the skb. We will be left
- * with that task during exit. This also handles the case of
- * a packet destined for a partition which is no longer up.
- */
- atomic_set(&queued_msg->use_count, 1);
- queued_msg->skb = skb;
-
- if (skb->data[0] == 0xff) {
- /* we are being asked to broadcast to all partitions */
- for_each_set_bit(dest_partid, xpnet_broadcast_partitions,
- xp_max_npartitions) {
-
- xpnet_send(skb, queued_msg, start_addr, end_addr,
- embedded_bytes, dest_partid);
- }
- } else {
- dest_partid = (short)skb->data[XPNET_PARTID_OCTET + 1];
- dest_partid |= (short)skb->data[XPNET_PARTID_OCTET + 0] << 8;
-
- if (dest_partid >= 0 &&
- dest_partid < xp_max_npartitions &&
- test_bit(dest_partid, xpnet_broadcast_partitions) != 0) {
-
- xpnet_send(skb, queued_msg, start_addr, end_addr,
- embedded_bytes, dest_partid);
- }
- }
-
- dev->stats.tx_packets++;
- dev->stats.tx_bytes += skb->len;
-
- if (atomic_dec_return(&queued_msg->use_count) == 0) {
- dev_kfree_skb(skb);
- kfree(queued_msg);
- }
-
- return NETDEV_TX_OK;
-}
-
-/*
- * Deal with transmit timeouts coming from the network layer.
- */
-static void
-xpnet_dev_tx_timeout(struct net_device *dev, unsigned int txqueue)
-{
- dev->stats.tx_errors++;
-}
-
-static const struct net_device_ops xpnet_netdev_ops = {
- .ndo_open = xpnet_dev_open,
- .ndo_stop = xpnet_dev_stop,
- .ndo_start_xmit = xpnet_dev_hard_start_xmit,
- .ndo_tx_timeout = xpnet_dev_tx_timeout,
- .ndo_set_mac_address = eth_mac_addr,
- .ndo_validate_addr = eth_validate_addr,
-};
-
-static int __init
-xpnet_init(void)
-{
- u8 addr[ETH_ALEN];
- int result;
-
- if (!is_uv_system())
- return -ENODEV;
-
- dev_info(xpnet, "registering network device %s\n", XPNET_DEVICE_NAME);
-
- xpnet_broadcast_partitions = bitmap_zalloc(xp_max_npartitions,
- GFP_KERNEL);
- if (xpnet_broadcast_partitions == NULL)
- return -ENOMEM;
-
- /*
- * use ether_setup() to init the majority of our device
- * structure and then override the necessary pieces.
- */
- xpnet_device = alloc_netdev(0, XPNET_DEVICE_NAME, NET_NAME_UNKNOWN,
- ether_setup);
- if (xpnet_device == NULL) {
- bitmap_free(xpnet_broadcast_partitions);
- return -ENOMEM;
- }
-
- netif_carrier_off(xpnet_device);
-
- xpnet_device->netdev_ops = &xpnet_netdev_ops;
- xpnet_device->mtu = XPNET_DEF_MTU;
- xpnet_device->min_mtu = XPNET_MIN_MTU;
- xpnet_device->max_mtu = XPNET_MAX_MTU;
-
- memset(addr, 0, sizeof(addr));
- /*
- * Multicast assumes the LSB of the first octet is set for multicast
- * MAC addresses. We chose the first octet of the MAC to be unlikely
- * to collide with any vendor's officially issued MAC.
- */
- addr[0] = 0x02; /* locally administered, no OUI */
-
- addr[XPNET_PARTID_OCTET + 1] = xp_partition_id;
- addr[XPNET_PARTID_OCTET + 0] = (xp_partition_id >> 8);
- eth_hw_addr_set(xpnet_device, addr);
-
- /*
- * ether_setup() sets this to a multicast device. We are
- * really not supporting multicast at this time.
- */
- xpnet_device->flags &= ~IFF_MULTICAST;
-
- /*
- * No need to checksum as it is a DMA transfer. The BTE will
- * report an error if the data is not retrievable and the
- * packet will be dropped.
- */
- xpnet_device->features = NETIF_F_HW_CSUM;
-
- result = register_netdev(xpnet_device);
- if (result != 0) {
- free_netdev(xpnet_device);
- bitmap_free(xpnet_broadcast_partitions);
- }
-
- return result;
-}
-
-module_init(xpnet_init);
-
-static void __exit
-xpnet_exit(void)
-{
- dev_info(xpnet, "unregistering network device %s\n",
- xpnet_device[0].name);
-
- unregister_netdev(xpnet_device);
- free_netdev(xpnet_device);
- bitmap_free(xpnet_broadcast_partitions);
-}
-
-module_exit(xpnet_exit);
-
-MODULE_AUTHOR("Silicon Graphics, Inc.");
-MODULE_DESCRIPTION("Cross Partition Network adapter (XPNET)");
-MODULE_LICENSE("GPL");
--
2.43.0
^ permalink raw reply related [flat|nested] 8+ messages in thread
* [PATCH 2/2] misc: sgi-gru: Remove SGI GRU driver
2026-07-31 14:26 [PATCH 0/2] Remove the sgi-gru and sgi-xp drivers Dimitri Sivanich
2026-07-31 14:30 ` [PATCH 1/2] misc: sgi-xp: Remove SGI XP drivers Dimitri Sivanich
@ 2026-07-31 14:37 ` Dimitri Sivanich
2026-07-31 17:09 ` Muhammad Usama Anjum
` (2 more replies)
1 sibling, 3 replies; 8+ messages in thread
From: Dimitri Sivanich @ 2026-07-31 14:37 UTC (permalink / raw)
To: Greg Kroah-Hartman
Cc: Steve Wahl, Anderson, Russ, Robin Holt, Arnd Bergmann, Kees Cook,
Russell King, Andrew Morton, David Hildenbrand (Arm),
Lorenzo Stoakes (Oracle), Muhammad Usama Anjum, netdev,
linux-kernel, Dimitri Sivanich
Due to security concerns, remove the SGI GRU driver, which cannot be used
on anything newer than the long time unsupported UV2 platform.
Signed-off-by: Dimitri Sivanich <sivanich@hpe.com>
---
MAINTAINERS | 5 -
drivers/misc/Kconfig | 21 -
drivers/misc/Makefile | 1 -
drivers/misc/sgi-gru/Makefile | 6 -
drivers/misc/sgi-gru/gru.h | 76 --
drivers/misc/sgi-gru/gru_instructions.h | 726 --------------
drivers/misc/sgi-gru/grufault.c | 903 ------------------
drivers/misc/sgi-gru/grufile.c | 540 -----------
drivers/misc/sgi-gru/gruhandles.c | 192 ----
drivers/misc/sgi-gru/gruhandles.h | 517 ----------
drivers/misc/sgi-gru/grukdump.c | 223 -----
drivers/misc/sgi-gru/grukservices.c | 1157 -----------------------
drivers/misc/sgi-gru/grukservices.h | 201 ----
drivers/misc/sgi-gru/grulib.h | 153 ---
drivers/misc/sgi-gru/grumain.c | 969 -------------------
drivers/misc/sgi-gru/gruprocfs.c | 308 ------
drivers/misc/sgi-gru/grutables.h | 659 -------------
drivers/misc/sgi-gru/grutlbpurge.c | 316 -------
18 files changed, 6973 deletions(-)
delete mode 100644 drivers/misc/sgi-gru/Makefile
delete mode 100644 drivers/misc/sgi-gru/gru.h
delete mode 100644 drivers/misc/sgi-gru/gru_instructions.h
delete mode 100644 drivers/misc/sgi-gru/grufault.c
delete mode 100644 drivers/misc/sgi-gru/grufile.c
delete mode 100644 drivers/misc/sgi-gru/gruhandles.c
delete mode 100644 drivers/misc/sgi-gru/gruhandles.h
delete mode 100644 drivers/misc/sgi-gru/grukdump.c
delete mode 100644 drivers/misc/sgi-gru/grukservices.c
delete mode 100644 drivers/misc/sgi-gru/grukservices.h
delete mode 100644 drivers/misc/sgi-gru/grulib.h
delete mode 100644 drivers/misc/sgi-gru/grumain.c
delete mode 100644 drivers/misc/sgi-gru/gruprocfs.c
delete mode 100644 drivers/misc/sgi-gru/grutables.h
delete mode 100644 drivers/misc/sgi-gru/grutlbpurge.c
diff --git a/MAINTAINERS b/MAINTAINERS
index 0267f5e3ce5e..6bce127b8263 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -24618,11 +24618,6 @@ F: include/linux/phylink.h
F: include/linux/sfp.h
K: phylink\.h|struct\s+phylink|\.phylink|>phylink_|phylink_(autoneg|clear|connect|create|destroy|disconnect|ethtool|helper|mac|mii|of|set|start|stop|test|validate)
-SGI GRU DRIVER
-M: Dimitri Sivanich <dimitri.sivanich@hpe.com>
-S: Maintained
-F: drivers/misc/sgi-gru/
-
SHARED MEMORY COMMUNICATIONS (SMC) SOCKETS
M: D. Wythe <alibuda@linux.alibaba.com>
M: Dust Li <dust.li@linux.alibaba.com>
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index 18b09ca716ca..16c172fd58fe 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -297,27 +297,6 @@ config QCOM_FASTRPC
applications DSP processor. Say M if you want to enable this
module.
-config SGI_GRU
- tristate "SGI GRU driver"
- depends on X86_UV && SMP
- select MMU_NOTIFIER
- help
- The GRU is a hardware resource located in the system chipset. The GRU
- contains memory that can be mmapped into the user address space.
- This memory is used to communicate with the GRU to perform functions
- such as load/store, scatter/gather, bcopy, AMOs, etc. The GRU is
- directly accessed by user instructions using user virtual addresses.
- GRU instructions (ex., bcopy) use user virtual addresses for operands.
-
- If you are not running on a SGI UV system, say N.
-
-config SGI_GRU_DEBUG
- bool "SGI GRU driver debug"
- depends on SGI_GRU
- help
- This option enables additional debugging code for the SGI GRU driver.
- If you are unsure, say N.
-
config APDS9802ALS
tristate "Medfield Avago APDS9802 ALS Sensor module"
depends on I2C
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index 0e74b550b938..765da6c2819a 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -22,7 +22,6 @@ obj-$(CONFIG_QCOM_FASTRPC) += fastrpc.o
obj-$(CONFIG_SENSORS_BH1770) += bh1770glc.o
obj-$(CONFIG_ENCLOSURE_SERVICES) += enclosure.o
obj-$(CONFIG_KGDB_TESTS) += kgdbts.o
-obj-$(CONFIG_SGI_GRU) += sgi-gru/
obj-$(CONFIG_SMPRO_ERRMON) += smpro-errmon.o
obj-$(CONFIG_SMPRO_MISC) += smpro-misc.o
obj-$(CONFIG_CS5535_MFGPT) += cs5535-mfgpt.o
diff --git a/drivers/misc/sgi-gru/Makefile b/drivers/misc/sgi-gru/Makefile
deleted file mode 100644
index 8132116ec0f0..000000000000
--- a/drivers/misc/sgi-gru/Makefile
+++ /dev/null
@@ -1,6 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0-only
-ccflags-$(CONFIG_SGI_GRU_DEBUG) := -DDEBUG
-
-obj-$(CONFIG_SGI_GRU) := gru.o
-gru-y := grufile.o grumain.o grufault.o grutlbpurge.o gruprocfs.o grukservices.o gruhandles.o grukdump.o
-
diff --git a/drivers/misc/sgi-gru/gru.h b/drivers/misc/sgi-gru/gru.h
deleted file mode 100644
index 6ae045037219..000000000000
--- a/drivers/misc/sgi-gru/gru.h
+++ /dev/null
@@ -1,76 +0,0 @@
-/*
- * Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published by
- * the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-#ifndef __GRU_H__
-#define __GRU_H__
-
-/*
- * GRU architectural definitions
- */
-#define GRU_CACHE_LINE_BYTES 64
-#define GRU_HANDLE_STRIDE 256
-#define GRU_CB_BASE 0
-#define GRU_DS_BASE 0x20000
-
-/*
- * Size used to map GRU GSeg
- */
-#if defined(CONFIG_X86_64)
-#define GRU_GSEG_PAGESIZE (256 * 1024UL) /* ZZZ 2MB ??? */
-#else
-#error "Unsupported architecture"
-#endif
-
-/*
- * Structure for obtaining GRU resource information
- */
-struct gru_chiplet_info {
- int node;
- int chiplet;
- int blade;
- int total_dsr_bytes;
- int total_cbr;
- int total_user_dsr_bytes;
- int total_user_cbr;
- int free_user_dsr_bytes;
- int free_user_cbr;
-};
-
-/*
- * Statictics kept for each context.
- */
-struct gru_gseg_statistics {
- unsigned long fmm_tlbmiss;
- unsigned long upm_tlbmiss;
- unsigned long tlbdropin;
- unsigned long context_stolen;
- unsigned long reserved[10];
-};
-
-/* Flags for GRU options on the gru_create_context() call */
-/* Select one of the follow 4 options to specify how TLB misses are handled */
-#define GRU_OPT_MISS_DEFAULT 0x0000 /* Use default mode */
-#define GRU_OPT_MISS_USER_POLL 0x0001 /* User will poll CB for faults */
-#define GRU_OPT_MISS_FMM_INTR 0x0002 /* Send interrupt to cpu to
- handle fault */
-#define GRU_OPT_MISS_FMM_POLL 0x0003 /* Use system polling thread */
-#define GRU_OPT_MISS_MASK 0x0003 /* Mask for TLB MISS option */
-
-
-
-#endif /* __GRU_H__ */
diff --git a/drivers/misc/sgi-gru/gru_instructions.h b/drivers/misc/sgi-gru/gru_instructions.h
deleted file mode 100644
index da5eb9edf9ec..000000000000
--- a/drivers/misc/sgi-gru/gru_instructions.h
+++ /dev/null
@@ -1,726 +0,0 @@
-/*
- * Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published by
- * the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-#ifndef __GRU_INSTRUCTIONS_H__
-#define __GRU_INSTRUCTIONS_H__
-
-extern int gru_check_status_proc(void *cb);
-extern int gru_wait_proc(void *cb);
-extern void gru_wait_abort_proc(void *cb);
-
-
-
-/*
- * Architecture dependent functions
- */
-
-#if defined(CONFIG_X86_64)
-#include <asm/cacheflush.h>
-#define __flush_cache(p) clflush(p)
-#define gru_ordered_store_ulong(p, v) \
- do { \
- barrier(); \
- *(unsigned long *)p = v; \
- } while (0)
-#else
-#error "Unsupported architecture"
-#endif
-
-/*
- * Control block status and exception codes
- */
-#define CBS_IDLE 0
-#define CBS_EXCEPTION 1
-#define CBS_ACTIVE 2
-#define CBS_CALL_OS 3
-
-/* CB substatus bitmasks */
-#define CBSS_MSG_QUEUE_MASK 7
-#define CBSS_IMPLICIT_ABORT_ACTIVE_MASK 8
-
-/* CB substatus message queue values (low 3 bits of substatus) */
-#define CBSS_NO_ERROR 0
-#define CBSS_LB_OVERFLOWED 1
-#define CBSS_QLIMIT_REACHED 2
-#define CBSS_PAGE_OVERFLOW 3
-#define CBSS_AMO_NACKED 4
-#define CBSS_PUT_NACKED 5
-
-/*
- * Structure used to fetch exception detail for CBs that terminate with
- * CBS_EXCEPTION
- */
-struct control_block_extended_exc_detail {
- unsigned long cb;
- int opc;
- int ecause;
- int exopc;
- long exceptdet0;
- int exceptdet1;
- int cbrstate;
- int cbrexecstatus;
-};
-
-/*
- * Instruction formats
- */
-
-/*
- * Generic instruction format.
- * This definition has precise bit field definitions.
- */
-struct gru_instruction_bits {
- /* DW 0 - low */
- unsigned int icmd: 1;
- unsigned char ima: 3; /* CB_DelRep, unmapped mode */
- unsigned char reserved0: 4;
- unsigned int xtype: 3;
- unsigned int iaa0: 2;
- unsigned int iaa1: 2;
- unsigned char reserved1: 1;
- unsigned char opc: 8; /* opcode */
- unsigned char exopc: 8; /* extended opcode */
- /* DW 0 - high */
- unsigned int idef2: 22; /* TRi0 */
- unsigned char reserved2: 2;
- unsigned char istatus: 2;
- unsigned char isubstatus:4;
- unsigned char reserved3: 1;
- unsigned char tlb_fault_color: 1;
- /* DW 1 */
- unsigned long idef4; /* 42 bits: TRi1, BufSize */
- /* DW 2-6 */
- unsigned long idef1; /* BAddr0 */
- unsigned long idef5; /* Nelem */
- unsigned long idef6; /* Stride, Operand1 */
- unsigned long idef3; /* BAddr1, Value, Operand2 */
- unsigned long reserved4;
- /* DW 7 */
- unsigned long avalue; /* AValue */
-};
-
-/*
- * Generic instruction with friendlier names. This format is used
- * for inline instructions.
- */
-struct gru_instruction {
- /* DW 0 */
- union {
- unsigned long op64; /* icmd,xtype,iaa0,ima,opc,tri0 */
- struct {
- unsigned int op32;
- unsigned int tri0;
- };
- };
- unsigned long tri1_bufsize; /* DW 1 */
- unsigned long baddr0; /* DW 2 */
- unsigned long nelem; /* DW 3 */
- unsigned long op1_stride; /* DW 4 */
- unsigned long op2_value_baddr1; /* DW 5 */
- unsigned long reserved0; /* DW 6 */
- unsigned long avalue; /* DW 7 */
-};
-
-/* Some shifts and masks for the low 64 bits of a GRU command */
-#define GRU_CB_ICMD_SHFT 0
-#define GRU_CB_ICMD_MASK 0x1
-#define GRU_CB_XTYPE_SHFT 8
-#define GRU_CB_XTYPE_MASK 0x7
-#define GRU_CB_IAA0_SHFT 11
-#define GRU_CB_IAA0_MASK 0x3
-#define GRU_CB_IAA1_SHFT 13
-#define GRU_CB_IAA1_MASK 0x3
-#define GRU_CB_IMA_SHFT 1
-#define GRU_CB_IMA_MASK 0x3
-#define GRU_CB_OPC_SHFT 16
-#define GRU_CB_OPC_MASK 0xff
-#define GRU_CB_EXOPC_SHFT 24
-#define GRU_CB_EXOPC_MASK 0xff
-#define GRU_IDEF2_SHFT 32
-#define GRU_IDEF2_MASK 0x3ffff
-#define GRU_ISTATUS_SHFT 56
-#define GRU_ISTATUS_MASK 0x3
-
-/* GRU instruction opcodes (opc field) */
-#define OP_NOP 0x00
-#define OP_BCOPY 0x01
-#define OP_VLOAD 0x02
-#define OP_IVLOAD 0x03
-#define OP_VSTORE 0x04
-#define OP_IVSTORE 0x05
-#define OP_VSET 0x06
-#define OP_IVSET 0x07
-#define OP_MESQ 0x08
-#define OP_GAMXR 0x09
-#define OP_GAMIR 0x0a
-#define OP_GAMIRR 0x0b
-#define OP_GAMER 0x0c
-#define OP_GAMERR 0x0d
-#define OP_BSTORE 0x0e
-#define OP_VFLUSH 0x0f
-
-
-/* Extended opcodes values (exopc field) */
-
-/* GAMIR - AMOs with implicit operands */
-#define EOP_IR_FETCH 0x01 /* Plain fetch of memory */
-#define EOP_IR_CLR 0x02 /* Fetch and clear */
-#define EOP_IR_INC 0x05 /* Fetch and increment */
-#define EOP_IR_DEC 0x07 /* Fetch and decrement */
-#define EOP_IR_QCHK1 0x0d /* Queue check, 64 byte msg */
-#define EOP_IR_QCHK2 0x0e /* Queue check, 128 byte msg */
-
-/* GAMIRR - Registered AMOs with implicit operands */
-#define EOP_IRR_FETCH 0x01 /* Registered fetch of memory */
-#define EOP_IRR_CLR 0x02 /* Registered fetch and clear */
-#define EOP_IRR_INC 0x05 /* Registered fetch and increment */
-#define EOP_IRR_DEC 0x07 /* Registered fetch and decrement */
-#define EOP_IRR_DECZ 0x0f /* Registered fetch and decrement, update on zero*/
-
-/* GAMER - AMOs with explicit operands */
-#define EOP_ER_SWAP 0x00 /* Exchange argument and memory */
-#define EOP_ER_OR 0x01 /* Logical OR with memory */
-#define EOP_ER_AND 0x02 /* Logical AND with memory */
-#define EOP_ER_XOR 0x03 /* Logical XOR with memory */
-#define EOP_ER_ADD 0x04 /* Add value to memory */
-#define EOP_ER_CSWAP 0x08 /* Compare with operand2, write operand1 if match*/
-#define EOP_ER_CADD 0x0c /* Queue check, operand1*64 byte msg */
-
-/* GAMERR - Registered AMOs with explicit operands */
-#define EOP_ERR_SWAP 0x00 /* Exchange argument and memory */
-#define EOP_ERR_OR 0x01 /* Logical OR with memory */
-#define EOP_ERR_AND 0x02 /* Logical AND with memory */
-#define EOP_ERR_XOR 0x03 /* Logical XOR with memory */
-#define EOP_ERR_ADD 0x04 /* Add value to memory */
-#define EOP_ERR_CSWAP 0x08 /* Compare with operand2, write operand1 if match*/
-#define EOP_ERR_EPOLL 0x09 /* Poll for equality */
-#define EOP_ERR_NPOLL 0x0a /* Poll for inequality */
-
-/* GAMXR - SGI Arithmetic unit */
-#define EOP_XR_CSWAP 0x0b /* Masked compare exchange */
-
-
-/* Transfer types (xtype field) */
-#define XTYPE_B 0x0 /* byte */
-#define XTYPE_S 0x1 /* short (2-byte) */
-#define XTYPE_W 0x2 /* word (4-byte) */
-#define XTYPE_DW 0x3 /* doubleword (8-byte) */
-#define XTYPE_CL 0x6 /* cacheline (64-byte) */
-
-
-/* Instruction access attributes (iaa0, iaa1 fields) */
-#define IAA_RAM 0x0 /* normal cached RAM access */
-#define IAA_NCRAM 0x2 /* noncoherent RAM access */
-#define IAA_MMIO 0x1 /* noncoherent memory-mapped I/O space */
-#define IAA_REGISTER 0x3 /* memory-mapped registers, etc. */
-
-
-/* Instruction mode attributes (ima field) */
-#define IMA_MAPPED 0x0 /* Virtual mode */
-#define IMA_CB_DELAY 0x1 /* hold read responses until status changes */
-#define IMA_UNMAPPED 0x2 /* bypass the TLBs (OS only) */
-#define IMA_INTERRUPT 0x4 /* Interrupt when instruction completes */
-
-/* CBE ecause bits */
-#define CBE_CAUSE_RI (1 << 0)
-#define CBE_CAUSE_INVALID_INSTRUCTION (1 << 1)
-#define CBE_CAUSE_UNMAPPED_MODE_FORBIDDEN (1 << 2)
-#define CBE_CAUSE_PE_CHECK_DATA_ERROR (1 << 3)
-#define CBE_CAUSE_IAA_GAA_MISMATCH (1 << 4)
-#define CBE_CAUSE_DATA_SEGMENT_LIMIT_EXCEPTION (1 << 5)
-#define CBE_CAUSE_OS_FATAL_TLB_FAULT (1 << 6)
-#define CBE_CAUSE_EXECUTION_HW_ERROR (1 << 7)
-#define CBE_CAUSE_TLBHW_ERROR (1 << 8)
-#define CBE_CAUSE_RA_REQUEST_TIMEOUT (1 << 9)
-#define CBE_CAUSE_HA_REQUEST_TIMEOUT (1 << 10)
-#define CBE_CAUSE_RA_RESPONSE_FATAL (1 << 11)
-#define CBE_CAUSE_RA_RESPONSE_NON_FATAL (1 << 12)
-#define CBE_CAUSE_HA_RESPONSE_FATAL (1 << 13)
-#define CBE_CAUSE_HA_RESPONSE_NON_FATAL (1 << 14)
-#define CBE_CAUSE_ADDRESS_SPACE_DECODE_ERROR (1 << 15)
-#define CBE_CAUSE_PROTOCOL_STATE_DATA_ERROR (1 << 16)
-#define CBE_CAUSE_RA_RESPONSE_DATA_ERROR (1 << 17)
-#define CBE_CAUSE_HA_RESPONSE_DATA_ERROR (1 << 18)
-#define CBE_CAUSE_FORCED_ERROR (1 << 19)
-
-/* CBE cbrexecstatus bits */
-#define CBR_EXS_ABORT_OCC_BIT 0
-#define CBR_EXS_INT_OCC_BIT 1
-#define CBR_EXS_PENDING_BIT 2
-#define CBR_EXS_QUEUED_BIT 3
-#define CBR_EXS_TLB_INVAL_BIT 4
-#define CBR_EXS_EXCEPTION_BIT 5
-#define CBR_EXS_CB_INT_PENDING_BIT 6
-
-#define CBR_EXS_ABORT_OCC (1 << CBR_EXS_ABORT_OCC_BIT)
-#define CBR_EXS_INT_OCC (1 << CBR_EXS_INT_OCC_BIT)
-#define CBR_EXS_PENDING (1 << CBR_EXS_PENDING_BIT)
-#define CBR_EXS_QUEUED (1 << CBR_EXS_QUEUED_BIT)
-#define CBR_EXS_TLB_INVAL (1 << CBR_EXS_TLB_INVAL_BIT)
-#define CBR_EXS_EXCEPTION (1 << CBR_EXS_EXCEPTION_BIT)
-#define CBR_EXS_CB_INT_PENDING (1 << CBR_EXS_CB_INT_PENDING_BIT)
-
-/*
- * Exceptions are retried for the following cases. If any OTHER bits are set
- * in ecause, the exception is not retryable.
- */
-#define EXCEPTION_RETRY_BITS (CBE_CAUSE_EXECUTION_HW_ERROR | \
- CBE_CAUSE_TLBHW_ERROR | \
- CBE_CAUSE_RA_REQUEST_TIMEOUT | \
- CBE_CAUSE_RA_RESPONSE_NON_FATAL | \
- CBE_CAUSE_HA_RESPONSE_NON_FATAL | \
- CBE_CAUSE_RA_RESPONSE_DATA_ERROR | \
- CBE_CAUSE_HA_RESPONSE_DATA_ERROR \
- )
-
-/* Message queue head structure */
-union gru_mesqhead {
- unsigned long val;
- struct {
- unsigned int head;
- unsigned int limit;
- };
-};
-
-
-/* Generate the low word of a GRU instruction */
-static inline unsigned long
-__opdword(unsigned char opcode, unsigned char exopc, unsigned char xtype,
- unsigned char iaa0, unsigned char iaa1,
- unsigned long idef2, unsigned char ima)
-{
- return (1 << GRU_CB_ICMD_SHFT) |
- ((unsigned long)CBS_ACTIVE << GRU_ISTATUS_SHFT) |
- (idef2<< GRU_IDEF2_SHFT) |
- (iaa0 << GRU_CB_IAA0_SHFT) |
- (iaa1 << GRU_CB_IAA1_SHFT) |
- (ima << GRU_CB_IMA_SHFT) |
- (xtype << GRU_CB_XTYPE_SHFT) |
- (opcode << GRU_CB_OPC_SHFT) |
- (exopc << GRU_CB_EXOPC_SHFT);
-}
-
-/*
- * Architecture specific intrinsics
- */
-static inline void gru_flush_cache(void *p)
-{
- __flush_cache(p);
-}
-
-/*
- * Store the lower 64 bits of the command including the "start" bit. Then
- * start the instruction executing.
- */
-static inline void gru_start_instruction(struct gru_instruction *ins, unsigned long op64)
-{
- gru_ordered_store_ulong(ins, op64);
- mb();
- gru_flush_cache(ins);
-}
-
-
-/* Convert "hints" to IMA */
-#define CB_IMA(h) ((h) | IMA_UNMAPPED)
-
-/* Convert data segment cache line index into TRI0 / TRI1 value */
-#define GRU_DINDEX(i) ((i) * GRU_CACHE_LINE_BYTES)
-
-/* Inline functions for GRU instructions.
- * Note:
- * - nelem and stride are in elements
- * - tri0/tri1 is in bytes for the beginning of the data segment.
- */
-static inline void gru_vload_phys(void *cb, unsigned long gpa,
- unsigned int tri0, int iaa, unsigned long hints)
-{
- struct gru_instruction *ins = (struct gru_instruction *)cb;
-
- ins->baddr0 = (long)gpa | ((unsigned long)iaa << 62);
- ins->nelem = 1;
- ins->op1_stride = 1;
- gru_start_instruction(ins, __opdword(OP_VLOAD, 0, XTYPE_DW, iaa, 0,
- (unsigned long)tri0, CB_IMA(hints)));
-}
-
-static inline void gru_vstore_phys(void *cb, unsigned long gpa,
- unsigned int tri0, int iaa, unsigned long hints)
-{
- struct gru_instruction *ins = (struct gru_instruction *)cb;
-
- ins->baddr0 = (long)gpa | ((unsigned long)iaa << 62);
- ins->nelem = 1;
- ins->op1_stride = 1;
- gru_start_instruction(ins, __opdword(OP_VSTORE, 0, XTYPE_DW, iaa, 0,
- (unsigned long)tri0, CB_IMA(hints)));
-}
-
-static inline void gru_vload(void *cb, unsigned long mem_addr,
- unsigned int tri0, unsigned char xtype, unsigned long nelem,
- unsigned long stride, unsigned long hints)
-{
- struct gru_instruction *ins = (struct gru_instruction *)cb;
-
- ins->baddr0 = (long)mem_addr;
- ins->nelem = nelem;
- ins->op1_stride = stride;
- gru_start_instruction(ins, __opdword(OP_VLOAD, 0, xtype, IAA_RAM, 0,
- (unsigned long)tri0, CB_IMA(hints)));
-}
-
-static inline void gru_vstore(void *cb, unsigned long mem_addr,
- unsigned int tri0, unsigned char xtype, unsigned long nelem,
- unsigned long stride, unsigned long hints)
-{
- struct gru_instruction *ins = (void *)cb;
-
- ins->baddr0 = (long)mem_addr;
- ins->nelem = nelem;
- ins->op1_stride = stride;
- gru_start_instruction(ins, __opdword(OP_VSTORE, 0, xtype, IAA_RAM, 0,
- tri0, CB_IMA(hints)));
-}
-
-static inline void gru_ivload(void *cb, unsigned long mem_addr,
- unsigned int tri0, unsigned int tri1, unsigned char xtype,
- unsigned long nelem, unsigned long hints)
-{
- struct gru_instruction *ins = (void *)cb;
-
- ins->baddr0 = (long)mem_addr;
- ins->nelem = nelem;
- ins->tri1_bufsize = tri1;
- gru_start_instruction(ins, __opdword(OP_IVLOAD, 0, xtype, IAA_RAM, 0,
- tri0, CB_IMA(hints)));
-}
-
-static inline void gru_ivstore(void *cb, unsigned long mem_addr,
- unsigned int tri0, unsigned int tri1,
- unsigned char xtype, unsigned long nelem, unsigned long hints)
-{
- struct gru_instruction *ins = (void *)cb;
-
- ins->baddr0 = (long)mem_addr;
- ins->nelem = nelem;
- ins->tri1_bufsize = tri1;
- gru_start_instruction(ins, __opdword(OP_IVSTORE, 0, xtype, IAA_RAM, 0,
- tri0, CB_IMA(hints)));
-}
-
-static inline void gru_vset(void *cb, unsigned long mem_addr,
- unsigned long value, unsigned char xtype, unsigned long nelem,
- unsigned long stride, unsigned long hints)
-{
- struct gru_instruction *ins = (void *)cb;
-
- ins->baddr0 = (long)mem_addr;
- ins->op2_value_baddr1 = value;
- ins->nelem = nelem;
- ins->op1_stride = stride;
- gru_start_instruction(ins, __opdword(OP_VSET, 0, xtype, IAA_RAM, 0,
- 0, CB_IMA(hints)));
-}
-
-static inline void gru_ivset(void *cb, unsigned long mem_addr,
- unsigned int tri1, unsigned long value, unsigned char xtype,
- unsigned long nelem, unsigned long hints)
-{
- struct gru_instruction *ins = (void *)cb;
-
- ins->baddr0 = (long)mem_addr;
- ins->op2_value_baddr1 = value;
- ins->nelem = nelem;
- ins->tri1_bufsize = tri1;
- gru_start_instruction(ins, __opdword(OP_IVSET, 0, xtype, IAA_RAM, 0,
- 0, CB_IMA(hints)));
-}
-
-static inline void gru_vflush(void *cb, unsigned long mem_addr,
- unsigned long nelem, unsigned char xtype, unsigned long stride,
- unsigned long hints)
-{
- struct gru_instruction *ins = (void *)cb;
-
- ins->baddr0 = (long)mem_addr;
- ins->op1_stride = stride;
- ins->nelem = nelem;
- gru_start_instruction(ins, __opdword(OP_VFLUSH, 0, xtype, IAA_RAM, 0,
- 0, CB_IMA(hints)));
-}
-
-static inline void gru_nop(void *cb, int hints)
-{
- struct gru_instruction *ins = (void *)cb;
-
- gru_start_instruction(ins, __opdword(OP_NOP, 0, 0, 0, 0, 0, CB_IMA(hints)));
-}
-
-
-static inline void gru_bcopy(void *cb, const unsigned long src,
- unsigned long dest,
- unsigned int tri0, unsigned int xtype, unsigned long nelem,
- unsigned int bufsize, unsigned long hints)
-{
- struct gru_instruction *ins = (void *)cb;
-
- ins->baddr0 = (long)src;
- ins->op2_value_baddr1 = (long)dest;
- ins->nelem = nelem;
- ins->tri1_bufsize = bufsize;
- gru_start_instruction(ins, __opdword(OP_BCOPY, 0, xtype, IAA_RAM,
- IAA_RAM, tri0, CB_IMA(hints)));
-}
-
-static inline void gru_bstore(void *cb, const unsigned long src,
- unsigned long dest, unsigned int tri0, unsigned int xtype,
- unsigned long nelem, unsigned long hints)
-{
- struct gru_instruction *ins = (void *)cb;
-
- ins->baddr0 = (long)src;
- ins->op2_value_baddr1 = (long)dest;
- ins->nelem = nelem;
- gru_start_instruction(ins, __opdword(OP_BSTORE, 0, xtype, 0, IAA_RAM,
- tri0, CB_IMA(hints)));
-}
-
-static inline void gru_gamir(void *cb, int exopc, unsigned long src,
- unsigned int xtype, unsigned long hints)
-{
- struct gru_instruction *ins = (void *)cb;
-
- ins->baddr0 = (long)src;
- gru_start_instruction(ins, __opdword(OP_GAMIR, exopc, xtype, IAA_RAM, 0,
- 0, CB_IMA(hints)));
-}
-
-static inline void gru_gamirr(void *cb, int exopc, unsigned long src,
- unsigned int xtype, unsigned long hints)
-{
- struct gru_instruction *ins = (void *)cb;
-
- ins->baddr0 = (long)src;
- gru_start_instruction(ins, __opdword(OP_GAMIRR, exopc, xtype, IAA_RAM, 0,
- 0, CB_IMA(hints)));
-}
-
-static inline void gru_gamer(void *cb, int exopc, unsigned long src,
- unsigned int xtype,
- unsigned long operand1, unsigned long operand2,
- unsigned long hints)
-{
- struct gru_instruction *ins = (void *)cb;
-
- ins->baddr0 = (long)src;
- ins->op1_stride = operand1;
- ins->op2_value_baddr1 = operand2;
- gru_start_instruction(ins, __opdword(OP_GAMER, exopc, xtype, IAA_RAM, 0,
- 0, CB_IMA(hints)));
-}
-
-static inline void gru_gamerr(void *cb, int exopc, unsigned long src,
- unsigned int xtype, unsigned long operand1,
- unsigned long operand2, unsigned long hints)
-{
- struct gru_instruction *ins = (void *)cb;
-
- ins->baddr0 = (long)src;
- ins->op1_stride = operand1;
- ins->op2_value_baddr1 = operand2;
- gru_start_instruction(ins, __opdword(OP_GAMERR, exopc, xtype, IAA_RAM, 0,
- 0, CB_IMA(hints)));
-}
-
-static inline void gru_gamxr(void *cb, unsigned long src,
- unsigned int tri0, unsigned long hints)
-{
- struct gru_instruction *ins = (void *)cb;
-
- ins->baddr0 = (long)src;
- ins->nelem = 4;
- gru_start_instruction(ins, __opdword(OP_GAMXR, EOP_XR_CSWAP, XTYPE_DW,
- IAA_RAM, 0, 0, CB_IMA(hints)));
-}
-
-static inline void gru_mesq(void *cb, unsigned long queue,
- unsigned long tri0, unsigned long nelem,
- unsigned long hints)
-{
- struct gru_instruction *ins = (void *)cb;
-
- ins->baddr0 = (long)queue;
- ins->nelem = nelem;
- gru_start_instruction(ins, __opdword(OP_MESQ, 0, XTYPE_CL, IAA_RAM, 0,
- tri0, CB_IMA(hints)));
-}
-
-static inline unsigned long gru_get_amo_value(void *cb)
-{
- struct gru_instruction *ins = (void *)cb;
-
- return ins->avalue;
-}
-
-static inline int gru_get_amo_value_head(void *cb)
-{
- struct gru_instruction *ins = (void *)cb;
-
- return ins->avalue & 0xffffffff;
-}
-
-static inline int gru_get_amo_value_limit(void *cb)
-{
- struct gru_instruction *ins = (void *)cb;
-
- return ins->avalue >> 32;
-}
-
-static inline union gru_mesqhead gru_mesq_head(int head, int limit)
-{
- union gru_mesqhead mqh;
-
- mqh.head = head;
- mqh.limit = limit;
- return mqh;
-}
-
-/*
- * Get struct control_block_extended_exc_detail for CB.
- */
-extern int gru_get_cb_exception_detail(void *cb,
- struct control_block_extended_exc_detail *excdet);
-
-#define GRU_EXC_STR_SIZE 256
-
-
-/*
- * Control block definition for checking status
- */
-struct gru_control_block_status {
- unsigned int icmd :1;
- unsigned int ima :3;
- unsigned int reserved0 :4;
- unsigned int unused1 :24;
- unsigned int unused2 :24;
- unsigned int istatus :2;
- unsigned int isubstatus :4;
- unsigned int unused3 :2;
-};
-
-/* Get CB status */
-static inline int gru_get_cb_status(void *cb)
-{
- struct gru_control_block_status *cbs = (void *)cb;
-
- return cbs->istatus;
-}
-
-/* Get CB message queue substatus */
-static inline int gru_get_cb_message_queue_substatus(void *cb)
-{
- struct gru_control_block_status *cbs = (void *)cb;
-
- return cbs->isubstatus & CBSS_MSG_QUEUE_MASK;
-}
-
-/* Get CB substatus */
-static inline int gru_get_cb_substatus(void *cb)
-{
- struct gru_control_block_status *cbs = (void *)cb;
-
- return cbs->isubstatus;
-}
-
-/*
- * User interface to check an instruction status. UPM and exceptions
- * are handled automatically. However, this function does NOT wait
- * for an active instruction to complete.
- *
- */
-static inline int gru_check_status(void *cb)
-{
- struct gru_control_block_status *cbs = (void *)cb;
- int ret;
-
- ret = cbs->istatus;
- if (ret != CBS_ACTIVE)
- ret = gru_check_status_proc(cb);
- return ret;
-}
-
-/*
- * User interface (via inline function) to wait for an instruction
- * to complete. Completion status (IDLE or EXCEPTION is returned
- * to the user. Exception due to hardware errors are automatically
- * retried before returning an exception.
- *
- */
-static inline int gru_wait(void *cb)
-{
- return gru_wait_proc(cb);
-}
-
-/*
- * Wait for CB to complete. Aborts program if error. (Note: error does NOT
- * mean TLB mis - only fatal errors such as memory parity error or user
- * bugs will cause termination.
- */
-static inline void gru_wait_abort(void *cb)
-{
- gru_wait_abort_proc(cb);
-}
-
-/*
- * Get a pointer to the start of a gseg
- * p - Any valid pointer within the gseg
- */
-static inline void *gru_get_gseg_pointer (void *p)
-{
- return (void *)((unsigned long)p & ~(GRU_GSEG_PAGESIZE - 1));
-}
-
-/*
- * Get a pointer to a control block
- * gseg - GSeg address returned from gru_get_thread_gru_segment()
- * index - index of desired CB
- */
-static inline void *gru_get_cb_pointer(void *gseg,
- int index)
-{
- return gseg + GRU_CB_BASE + index * GRU_HANDLE_STRIDE;
-}
-
-/*
- * Get a pointer to a cacheline in the data segment portion of a GSeg
- * gseg - GSeg address returned from gru_get_thread_gru_segment()
- * index - index of desired cache line
- */
-static inline void *gru_get_data_pointer(void *gseg, int index)
-{
- return gseg + GRU_DS_BASE + index * GRU_CACHE_LINE_BYTES;
-}
-
-/*
- * Convert a vaddr into the tri index within the GSEG
- * vaddr - virtual address of within gseg
- */
-static inline int gru_get_tri(void *vaddr)
-{
- return ((unsigned long)vaddr & (GRU_GSEG_PAGESIZE - 1)) - GRU_DS_BASE;
-}
-#endif /* __GRU_INSTRUCTIONS_H__ */
diff --git a/drivers/misc/sgi-gru/grufault.c b/drivers/misc/sgi-gru/grufault.c
deleted file mode 100644
index 3557d78ee47a..000000000000
--- a/drivers/misc/sgi-gru/grufault.c
+++ /dev/null
@@ -1,903 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * SN Platform GRU Driver
- *
- * FAULT HANDLER FOR GRU DETECTED TLB MISSES
- *
- * This file contains code that handles TLB misses within the GRU.
- * These misses are reported either via interrupts or user polling of
- * the user CB.
- *
- * Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
- */
-
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/spinlock.h>
-#include <linux/mm.h>
-#include <linux/hugetlb.h>
-#include <linux/device.h>
-#include <linux/io.h>
-#include <linux/uaccess.h>
-#include <linux/security.h>
-#include <linux/sync_core.h>
-#include <linux/prefetch.h>
-#include "gru.h"
-#include "grutables.h"
-#include "grulib.h"
-#include "gru_instructions.h"
-#include <asm/uv/uv_hub.h>
-
-/* Return codes for vtop functions */
-#define VTOP_SUCCESS 0
-#define VTOP_INVALID -1
-#define VTOP_RETRY -2
-
-
-/*
- * Test if a physical address is a valid GRU GSEG address
- */
-static inline int is_gru_paddr(unsigned long paddr)
-{
- return paddr >= gru_start_paddr && paddr < gru_end_paddr;
-}
-
-/*
- * Find the vma of a GRU segment. Caller must hold mmap_lock.
- */
-struct vm_area_struct *gru_find_vma(unsigned long vaddr)
-{
- struct vm_area_struct *vma;
-
- vma = vma_lookup(current->mm, vaddr);
- if (vma && vma->vm_ops == &gru_vm_ops)
- return vma;
- return NULL;
-}
-
-/*
- * Find and lock the gts that contains the specified user vaddr.
- *
- * Returns:
- * - *gts with the mmap_lock locked for read and the GTS locked.
- * - NULL if vaddr invalid OR is not a valid GSEG vaddr.
- */
-
-static struct gru_thread_state *gru_find_lock_gts(unsigned long vaddr)
-{
- struct mm_struct *mm = current->mm;
- struct vm_area_struct *vma;
- struct gru_thread_state *gts = NULL;
-
- mmap_read_lock(mm);
- vma = gru_find_vma(vaddr);
- if (vma)
- gts = gru_find_thread_state(vma, TSID(vaddr, vma));
- if (gts)
- mutex_lock(>s->ts_ctxlock);
- else
- mmap_read_unlock(mm);
- return gts;
-}
-
-static struct gru_thread_state *gru_alloc_locked_gts(unsigned long vaddr)
-{
- struct mm_struct *mm = current->mm;
- struct vm_area_struct *vma;
- struct gru_thread_state *gts = ERR_PTR(-EINVAL);
-
- mmap_write_lock(mm);
- vma = gru_find_vma(vaddr);
- if (!vma)
- goto err;
-
- gts = gru_alloc_thread_state(vma, TSID(vaddr, vma));
- if (IS_ERR(gts))
- goto err;
- mutex_lock(>s->ts_ctxlock);
- mmap_write_downgrade(mm);
- return gts;
-
-err:
- mmap_write_unlock(mm);
- return gts;
-}
-
-/*
- * Unlock a GTS that was previously locked with gru_find_lock_gts().
- */
-static void gru_unlock_gts(struct gru_thread_state *gts)
-{
- mutex_unlock(>s->ts_ctxlock);
- mmap_read_unlock(current->mm);
-}
-
-/*
- * Set a CB.istatus to active using a user virtual address. This must be done
- * just prior to a TFH RESTART. The new cb.istatus is an in-cache status ONLY.
- * If the line is evicted, the status may be lost. The in-cache update
- * is necessary to prevent the user from seeing a stale cb.istatus that will
- * change as soon as the TFH restart is complete. Races may cause an
- * occasional failure to clear the cb.istatus, but that is ok.
- */
-static void gru_cb_set_istatus_active(struct gru_instruction_bits *cbk)
-{
- if (cbk) {
- cbk->istatus = CBS_ACTIVE;
- }
-}
-
-/*
- * Read & clear a TFM
- *
- * The GRU has an array of fault maps. A map is private to a cpu
- * Only one cpu will be accessing a cpu's fault map.
- *
- * This function scans the cpu-private fault map & clears all bits that
- * are set. The function returns a bitmap that indicates the bits that
- * were cleared. Note that sense the maps may be updated asynchronously by
- * the GRU, atomic operations must be used to clear bits.
- */
-static void get_clear_fault_map(struct gru_state *gru,
- struct gru_tlb_fault_map *imap,
- struct gru_tlb_fault_map *dmap)
-{
- unsigned long i, k;
- struct gru_tlb_fault_map *tfm;
-
- tfm = get_tfm_for_cpu(gru, gru_cpu_fault_map_id());
- prefetchw(tfm); /* Helps on hardware, required for emulator */
- for (i = 0; i < BITS_TO_LONGS(GRU_NUM_CBE); i++) {
- k = tfm->fault_bits[i];
- if (k)
- k = xchg(&tfm->fault_bits[i], 0UL);
- imap->fault_bits[i] = k;
- k = tfm->done_bits[i];
- if (k)
- k = xchg(&tfm->done_bits[i], 0UL);
- dmap->fault_bits[i] = k;
- }
-
- /*
- * Not functionally required but helps performance. (Required
- * on emulator)
- */
- gru_flush_cache(tfm);
-}
-
-/*
- * Atomic (interrupt context) & non-atomic (user context) functions to
- * convert a vaddr into a physical address. The size of the page
- * is returned in pageshift.
- * returns:
- * 0 - successful
- * < 0 - error code
- * 1 - (atomic only) try again in non-atomic context
- */
-static int non_atomic_pte_lookup(struct vm_area_struct *vma,
- unsigned long vaddr, int write,
- unsigned long *paddr, int *pageshift)
-{
- struct page *page;
-
-#ifdef CONFIG_HUGETLB_PAGE
- *pageshift = is_vm_hugetlb_page(vma) ? HPAGE_SHIFT : PAGE_SHIFT;
-#else
- *pageshift = PAGE_SHIFT;
-#endif
- if (get_user_pages(vaddr, 1, write ? FOLL_WRITE : 0, &page) <= 0)
- return -EFAULT;
- *paddr = page_to_phys(page);
- put_page(page);
- return 0;
-}
-
-/*
- * atomic_pte_lookup
- *
- * Convert a user virtual address to a physical address
- * Only supports Intel large pages (2MB only) on x86_64.
- * ZZZ - hugepage support is incomplete
- *
- * NOTE: mmap_lock is already held on entry to this function. This
- * guarantees existence of the page tables.
- */
-static int atomic_pte_lookup(struct vm_area_struct *vma, unsigned long vaddr,
- int write, unsigned long *paddr, int *pageshift)
-{
- pgd_t *pgdp;
- p4d_t *p4dp;
- pud_t *pudp;
- pmd_t *pmdp;
- pte_t pte;
-
- pgdp = pgd_offset(vma->vm_mm, vaddr);
- if (unlikely(pgd_none(*pgdp)))
- goto err;
-
- p4dp = p4d_offset(pgdp, vaddr);
- if (unlikely(p4d_none(*p4dp)))
- goto err;
-
- pudp = pud_offset(p4dp, vaddr);
- if (unlikely(pud_none(*pudp)))
- goto err;
-
- pmdp = pmd_offset(pudp, vaddr);
- if (unlikely(pmd_none(*pmdp)))
- goto err;
-#ifdef CONFIG_X86_64
- if (unlikely(pmd_leaf(*pmdp)))
- pte = ptep_get((pte_t *)pmdp);
- else
-#endif
- pte = *pte_offset_kernel(pmdp, vaddr);
-
- if (unlikely(!pte_present(pte) ||
- (write && (!pte_write(pte) || !pte_dirty(pte)))))
- return 1;
-
- *paddr = pte_pfn(pte) << PAGE_SHIFT;
-#ifdef CONFIG_HUGETLB_PAGE
- *pageshift = is_vm_hugetlb_page(vma) ? HPAGE_SHIFT : PAGE_SHIFT;
-#else
- *pageshift = PAGE_SHIFT;
-#endif
- return 0;
-
-err:
- return 1;
-}
-
-static int gru_vtop(struct gru_thread_state *gts, unsigned long vaddr,
- int write, int atomic, unsigned long *gpa, int *pageshift)
-{
- struct mm_struct *mm = gts->ts_mm;
- struct vm_area_struct *vma;
- unsigned long paddr;
- int ret, ps;
-
- vma = find_vma(mm, vaddr);
- if (!vma)
- goto inval;
-
- /*
- * Atomic lookup is faster & usually works even if called in non-atomic
- * context.
- */
- rmb(); /* Must/check ms_range_active before loading PTEs */
- ret = atomic_pte_lookup(vma, vaddr, write, &paddr, &ps);
- if (ret) {
- if (atomic)
- goto upm;
- if (non_atomic_pte_lookup(vma, vaddr, write, &paddr, &ps))
- goto inval;
- }
- if (is_gru_paddr(paddr))
- goto inval;
- paddr = paddr & ~((1UL << ps) - 1);
- *gpa = uv_soc_phys_ram_to_gpa(paddr);
- *pageshift = ps;
- return VTOP_SUCCESS;
-
-inval:
- return VTOP_INVALID;
-upm:
- return VTOP_RETRY;
-}
-
-
-/*
- * Flush a CBE from cache. The CBE is clean in the cache. Dirty the
- * CBE cacheline so that the line will be written back to home agent.
- * Otherwise the line may be silently dropped. This has no impact
- * except on performance.
- */
-static void gru_flush_cache_cbe(struct gru_control_block_extended *cbe)
-{
- if (unlikely(cbe)) {
- cbe->cbrexecstatus = 0; /* make CL dirty */
- gru_flush_cache(cbe);
- }
-}
-
-/*
- * Preload the TLB with entries that may be required. Currently, preloading
- * is implemented only for BCOPY. Preload <tlb_preload_count> pages OR to
- * the end of the bcopy tranfer, whichever is smaller.
- */
-static void gru_preload_tlb(struct gru_state *gru,
- struct gru_thread_state *gts, int atomic,
- unsigned long fault_vaddr, int asid, int write,
- unsigned char tlb_preload_count,
- struct gru_tlb_fault_handle *tfh,
- struct gru_control_block_extended *cbe)
-{
- unsigned long vaddr = 0, gpa;
- int ret, pageshift;
-
- if (cbe->opccpy != OP_BCOPY)
- return;
-
- if (fault_vaddr == cbe->cbe_baddr0)
- vaddr = fault_vaddr + GRU_CACHE_LINE_BYTES * cbe->cbe_src_cl - 1;
- else if (fault_vaddr == cbe->cbe_baddr1)
- vaddr = fault_vaddr + (1 << cbe->xtypecpy) * cbe->cbe_nelemcur - 1;
-
- fault_vaddr &= PAGE_MASK;
- vaddr &= PAGE_MASK;
- vaddr = min(vaddr, fault_vaddr + tlb_preload_count * PAGE_SIZE);
-
- while (vaddr > fault_vaddr) {
- ret = gru_vtop(gts, vaddr, write, atomic, &gpa, &pageshift);
- if (ret || tfh_write_only(tfh, gpa, GAA_RAM, vaddr, asid, write,
- GRU_PAGESIZE(pageshift)))
- return;
- gru_dbg(grudev,
- "%s: gid %d, gts 0x%p, tfh 0x%p, vaddr 0x%lx, asid 0x%x, rw %d, ps %d, gpa 0x%lx\n",
- atomic ? "atomic" : "non-atomic", gru->gs_gid, gts, tfh,
- vaddr, asid, write, pageshift, gpa);
- vaddr -= PAGE_SIZE;
- STAT(tlb_preload_page);
- }
-}
-
-/*
- * Drop a TLB entry into the GRU. The fault is described by info in an TFH.
- * Input:
- * cb Address of user CBR. Null if not running in user context
- * Return:
- * 0 = dropin, exception, or switch to UPM successful
- * 1 = range invalidate active
- * < 0 = error code
- *
- */
-static int gru_try_dropin(struct gru_state *gru,
- struct gru_thread_state *gts,
- struct gru_tlb_fault_handle *tfh,
- struct gru_instruction_bits *cbk)
-{
- struct gru_control_block_extended *cbe = NULL;
- unsigned char tlb_preload_count = gts->ts_tlb_preload_count;
- int pageshift = 0, asid, write, ret, atomic = !cbk, indexway;
- unsigned long gpa = 0, vaddr = 0;
-
- /*
- * NOTE: The GRU contains magic hardware that eliminates races between
- * TLB invalidates and TLB dropins. If an invalidate occurs
- * in the window between reading the TFH and the subsequent TLB dropin,
- * the dropin is ignored. This eliminates the need for additional locks.
- */
-
- /*
- * Prefetch the CBE if doing TLB preloading
- */
- if (unlikely(tlb_preload_count)) {
- cbe = gru_tfh_to_cbe(tfh);
- prefetchw(cbe);
- }
-
- /*
- * Error if TFH state is IDLE or FMM mode & the user issuing a UPM call.
- * Might be a hardware race OR a stupid user. Ignore FMM because FMM
- * is a transient state.
- */
- if (tfh->status != TFHSTATUS_EXCEPTION) {
- gru_flush_cache(tfh);
- sync_core();
- if (tfh->status != TFHSTATUS_EXCEPTION)
- goto failnoexception;
- STAT(tfh_stale_on_fault);
- }
- if (tfh->state == TFHSTATE_IDLE)
- goto failidle;
- if (tfh->state == TFHSTATE_MISS_FMM && cbk)
- goto failfmm;
-
- write = (tfh->cause & TFHCAUSE_TLB_MOD) != 0;
- vaddr = tfh->missvaddr;
- asid = tfh->missasid;
- indexway = tfh->indexway;
- if (asid == 0)
- goto failnoasid;
-
- rmb(); /* TFH must be cache resident before reading ms_range_active */
-
- /*
- * TFH is cache resident - at least briefly. Fail the dropin
- * if a range invalidate is active.
- */
- if (atomic_read(>s->ts_gms->ms_range_active))
- goto failactive;
-
- ret = gru_vtop(gts, vaddr, write, atomic, &gpa, &pageshift);
- if (ret == VTOP_INVALID)
- goto failinval;
- if (ret == VTOP_RETRY)
- goto failupm;
-
- if (!(gts->ts_sizeavail & GRU_SIZEAVAIL(pageshift))) {
- gts->ts_sizeavail |= GRU_SIZEAVAIL(pageshift);
- if (atomic || !gru_update_cch(gts)) {
- gts->ts_force_cch_reload = 1;
- goto failupm;
- }
- }
-
- if (unlikely(cbe) && pageshift == PAGE_SHIFT) {
- gru_preload_tlb(gru, gts, atomic, vaddr, asid, write, tlb_preload_count, tfh, cbe);
- gru_flush_cache_cbe(cbe);
- }
-
- gru_cb_set_istatus_active(cbk);
- gts->ustats.tlbdropin++;
- tfh_write_restart(tfh, gpa, GAA_RAM, vaddr, asid, write,
- GRU_PAGESIZE(pageshift));
- gru_dbg(grudev,
- "%s: gid %d, gts 0x%p, tfh 0x%p, vaddr 0x%lx, asid 0x%x, indexway 0x%x,"
- " rw %d, ps %d, gpa 0x%lx\n",
- atomic ? "atomic" : "non-atomic", gru->gs_gid, gts, tfh, vaddr, asid,
- indexway, write, pageshift, gpa);
- STAT(tlb_dropin);
- return 0;
-
-failnoasid:
- /* No asid (delayed unload). */
- STAT(tlb_dropin_fail_no_asid);
- gru_dbg(grudev, "FAILED no_asid tfh: 0x%p, vaddr 0x%lx\n", tfh, vaddr);
- if (!cbk)
- tfh_user_polling_mode(tfh);
- else
- gru_flush_cache(tfh);
- gru_flush_cache_cbe(cbe);
- return -EAGAIN;
-
-failupm:
- /* Atomic failure switch CBR to UPM */
- tfh_user_polling_mode(tfh);
- gru_flush_cache_cbe(cbe);
- STAT(tlb_dropin_fail_upm);
- gru_dbg(grudev, "FAILED upm tfh: 0x%p, vaddr 0x%lx\n", tfh, vaddr);
- return 1;
-
-failfmm:
- /* FMM state on UPM call */
- gru_flush_cache(tfh);
- gru_flush_cache_cbe(cbe);
- STAT(tlb_dropin_fail_fmm);
- gru_dbg(grudev, "FAILED fmm tfh: 0x%p, state %d\n", tfh, tfh->state);
- return 0;
-
-failnoexception:
- /* TFH status did not show exception pending */
- gru_flush_cache(tfh);
- gru_flush_cache_cbe(cbe);
- if (cbk)
- gru_flush_cache(cbk);
- STAT(tlb_dropin_fail_no_exception);
- gru_dbg(grudev, "FAILED non-exception tfh: 0x%p, status %d, state %d\n",
- tfh, tfh->status, tfh->state);
- return 0;
-
-failidle:
- /* TFH state was idle - no miss pending */
- gru_flush_cache(tfh);
- gru_flush_cache_cbe(cbe);
- if (cbk)
- gru_flush_cache(cbk);
- STAT(tlb_dropin_fail_idle);
- gru_dbg(grudev, "FAILED idle tfh: 0x%p, state %d\n", tfh, tfh->state);
- return 0;
-
-failinval:
- /* All errors (atomic & non-atomic) switch CBR to EXCEPTION state */
- tfh_exception(tfh);
- gru_flush_cache_cbe(cbe);
- STAT(tlb_dropin_fail_invalid);
- gru_dbg(grudev, "FAILED inval tfh: 0x%p, vaddr 0x%lx\n", tfh, vaddr);
- return -EFAULT;
-
-failactive:
- /* Range invalidate active. Switch to UPM iff atomic */
- if (!cbk)
- tfh_user_polling_mode(tfh);
- else
- gru_flush_cache(tfh);
- gru_flush_cache_cbe(cbe);
- STAT(tlb_dropin_fail_range_active);
- gru_dbg(grudev, "FAILED range active: tfh 0x%p, vaddr 0x%lx\n",
- tfh, vaddr);
- return 1;
-}
-
-/*
- * Process an external interrupt from the GRU. This interrupt is
- * caused by a TLB miss.
- * Note that this is the interrupt handler that is registered with linux
- * interrupt handlers.
- */
-static irqreturn_t gru_intr(int chiplet, int blade)
-{
- struct gru_state *gru;
- struct gru_tlb_fault_map imap, dmap;
- struct gru_thread_state *gts;
- struct gru_tlb_fault_handle *tfh = NULL;
- struct completion *cmp;
- int cbrnum, ctxnum;
-
- STAT(intr);
-
- gru = &gru_base[blade]->bs_grus[chiplet];
- if (!gru) {
- dev_err(grudev, "GRU: invalid interrupt: cpu %d, chiplet %d\n",
- raw_smp_processor_id(), chiplet);
- return IRQ_NONE;
- }
- get_clear_fault_map(gru, &imap, &dmap);
- gru_dbg(grudev,
- "cpu %d, chiplet %d, gid %d, imap %016lx %016lx, dmap %016lx %016lx\n",
- smp_processor_id(), chiplet, gru->gs_gid,
- imap.fault_bits[0], imap.fault_bits[1],
- dmap.fault_bits[0], dmap.fault_bits[1]);
-
- for_each_cbr_in_tfm(cbrnum, dmap.fault_bits) {
- STAT(intr_cbr);
- cmp = gru->gs_blade->bs_async_wq;
- if (cmp)
- complete(cmp);
- gru_dbg(grudev, "gid %d, cbr_done %d, done %d\n",
- gru->gs_gid, cbrnum, cmp ? cmp->done : -1);
- }
-
- for_each_cbr_in_tfm(cbrnum, imap.fault_bits) {
- STAT(intr_tfh);
- tfh = get_tfh_by_index(gru, cbrnum);
- prefetchw(tfh); /* Helps on hdw, required for emulator */
-
- /*
- * When hardware sets a bit in the faultmap, it implicitly
- * locks the GRU context so that it cannot be unloaded.
- * The gts cannot change until a TFH start/writestart command
- * is issued.
- */
- ctxnum = tfh->ctxnum;
- gts = gru->gs_gts[ctxnum];
-
- /* Spurious interrupts can cause this. Ignore. */
- if (!gts) {
- STAT(intr_spurious);
- continue;
- }
-
- /*
- * This is running in interrupt context. Trylock the mmap_lock.
- * If it fails, retry the fault in user context.
- */
- gts->ustats.fmm_tlbmiss++;
- if (!gts->ts_force_cch_reload &&
- mmap_read_trylock(gts->ts_mm)) {
- gru_try_dropin(gru, gts, tfh, NULL);
- mmap_read_unlock(gts->ts_mm);
- } else {
- tfh_user_polling_mode(tfh);
- STAT(intr_mm_lock_failed);
- }
- }
- return IRQ_HANDLED;
-}
-
-irqreturn_t gru0_intr(int irq, void *dev_id)
-{
- return gru_intr(0, uv_numa_blade_id());
-}
-
-irqreturn_t gru1_intr(int irq, void *dev_id)
-{
- return gru_intr(1, uv_numa_blade_id());
-}
-
-irqreturn_t gru_intr_mblade(int irq, void *dev_id)
-{
- int blade;
-
- for_each_possible_blade(blade) {
- if (uv_blade_nr_possible_cpus(blade))
- continue;
- gru_intr(0, blade);
- gru_intr(1, blade);
- }
- return IRQ_HANDLED;
-}
-
-
-static int gru_user_dropin(struct gru_thread_state *gts,
- struct gru_tlb_fault_handle *tfh,
- void *cb)
-{
- struct gru_mm_struct *gms = gts->ts_gms;
- int ret;
-
- gts->ustats.upm_tlbmiss++;
- while (1) {
- wait_event(gms->ms_wait_queue,
- atomic_read(&gms->ms_range_active) == 0);
- prefetchw(tfh); /* Helps on hdw, required for emulator */
- ret = gru_try_dropin(gts->ts_gru, gts, tfh, cb);
- if (ret <= 0)
- return ret;
- STAT(call_os_wait_queue);
- }
-}
-
-/*
- * This interface is called as a result of a user detecting a "call OS" bit
- * in a user CB. Normally means that a TLB fault has occurred.
- * cb - user virtual address of the CB
- */
-int gru_handle_user_call_os(unsigned long cb)
-{
- struct gru_tlb_fault_handle *tfh;
- struct gru_thread_state *gts;
- void *cbk;
- int ucbnum, cbrnum, ret = -EINVAL;
-
- STAT(call_os);
-
- /* sanity check the cb pointer */
- ucbnum = get_cb_number((void *)cb);
- if ((cb & (GRU_HANDLE_STRIDE - 1)) || ucbnum >= GRU_NUM_CB)
- return -EINVAL;
-
-again:
- gts = gru_find_lock_gts(cb);
- if (!gts)
- return -EINVAL;
- gru_dbg(grudev, "address 0x%lx, gid %d, gts 0x%p\n", cb, gts->ts_gru ? gts->ts_gru->gs_gid : -1, gts);
-
- if (ucbnum >= gts->ts_cbr_au_count * GRU_CBR_AU_SIZE)
- goto exit;
-
- if (gru_check_context_placement(gts)) {
- gru_unlock_gts(gts);
- gru_unload_context(gts, 1);
- goto again;
- }
-
- /*
- * CCH may contain stale data if ts_force_cch_reload is set.
- */
- if (gts->ts_gru && gts->ts_force_cch_reload) {
- gts->ts_force_cch_reload = 0;
- gru_update_cch(gts);
- }
-
- ret = -EAGAIN;
- cbrnum = thread_cbr_number(gts, ucbnum);
- if (gts->ts_gru) {
- tfh = get_tfh_by_index(gts->ts_gru, cbrnum);
- cbk = get_gseg_base_address_cb(gts->ts_gru->gs_gru_base_vaddr,
- gts->ts_ctxnum, ucbnum);
- ret = gru_user_dropin(gts, tfh, cbk);
- }
-exit:
- gru_unlock_gts(gts);
- return ret;
-}
-
-/*
- * Fetch the exception detail information for a CB that terminated with
- * an exception.
- */
-int gru_get_exception_detail(unsigned long arg)
-{
- struct control_block_extended_exc_detail excdet;
- struct gru_control_block_extended *cbe;
- struct gru_thread_state *gts;
- int ucbnum, cbrnum, ret;
-
- STAT(user_exception);
- if (copy_from_user(&excdet, (void __user *)arg, sizeof(excdet)))
- return -EFAULT;
-
- gts = gru_find_lock_gts(excdet.cb);
- if (!gts)
- return -EINVAL;
-
- gru_dbg(grudev, "address 0x%lx, gid %d, gts 0x%p\n", excdet.cb, gts->ts_gru ? gts->ts_gru->gs_gid : -1, gts);
- ucbnum = get_cb_number((void *)excdet.cb);
- if (ucbnum >= gts->ts_cbr_au_count * GRU_CBR_AU_SIZE) {
- ret = -EINVAL;
- } else if (gts->ts_gru) {
- cbrnum = thread_cbr_number(gts, ucbnum);
- cbe = get_cbe_by_index(gts->ts_gru, cbrnum);
- gru_flush_cache(cbe); /* CBE not coherent */
- sync_core(); /* make sure we are have current data */
- excdet.opc = cbe->opccpy;
- excdet.exopc = cbe->exopccpy;
- excdet.ecause = cbe->ecause;
- excdet.exceptdet0 = cbe->idef1upd;
- excdet.exceptdet1 = cbe->idef3upd;
- excdet.cbrstate = cbe->cbrstate;
- excdet.cbrexecstatus = cbe->cbrexecstatus;
- gru_flush_cache_cbe(cbe);
- ret = 0;
- } else {
- ret = -EAGAIN;
- }
- gru_unlock_gts(gts);
-
- gru_dbg(grudev,
- "cb 0x%lx, op %d, exopc %d, cbrstate %d, cbrexecstatus 0x%x, ecause 0x%x, "
- "exdet0 0x%lx, exdet1 0x%x\n",
- excdet.cb, excdet.opc, excdet.exopc, excdet.cbrstate, excdet.cbrexecstatus,
- excdet.ecause, excdet.exceptdet0, excdet.exceptdet1);
- if (!ret && copy_to_user((void __user *)arg, &excdet, sizeof(excdet)))
- ret = -EFAULT;
- return ret;
-}
-
-/*
- * User request to unload a context. Content is saved for possible reload.
- */
-static int gru_unload_all_contexts(void)
-{
- struct gru_thread_state *gts;
- struct gru_state *gru;
- int gid, ctxnum;
-
- if (!capable(CAP_SYS_ADMIN))
- return -EPERM;
- foreach_gid(gid) {
- gru = GID_TO_GRU(gid);
- spin_lock(&gru->gs_lock);
- for (ctxnum = 0; ctxnum < GRU_NUM_CCH; ctxnum++) {
- gts = gru->gs_gts[ctxnum];
- if (gts && mutex_trylock(>s->ts_ctxlock)) {
- spin_unlock(&gru->gs_lock);
- gru_unload_context(gts, 1);
- mutex_unlock(>s->ts_ctxlock);
- spin_lock(&gru->gs_lock);
- }
- }
- spin_unlock(&gru->gs_lock);
- }
- return 0;
-}
-
-int gru_user_unload_context(unsigned long arg)
-{
- struct gru_thread_state *gts;
- struct gru_unload_context_req req;
-
- STAT(user_unload_context);
- if (copy_from_user(&req, (void __user *)arg, sizeof(req)))
- return -EFAULT;
-
- gru_dbg(grudev, "gseg 0x%lx\n", req.gseg);
-
- if (!req.gseg)
- return gru_unload_all_contexts();
-
- gts = gru_find_lock_gts(req.gseg);
- if (!gts)
- return -EINVAL;
-
- if (gts->ts_gru)
- gru_unload_context(gts, 1);
- gru_unlock_gts(gts);
-
- return 0;
-}
-
-/*
- * User request to flush a range of virtual addresses from the GRU TLB
- * (Mainly for testing).
- */
-int gru_user_flush_tlb(unsigned long arg)
-{
- struct gru_thread_state *gts;
- struct gru_flush_tlb_req req;
- struct gru_mm_struct *gms;
-
- STAT(user_flush_tlb);
- if (copy_from_user(&req, (void __user *)arg, sizeof(req)))
- return -EFAULT;
-
- gru_dbg(grudev, "gseg 0x%lx, vaddr 0x%lx, len 0x%lx\n", req.gseg,
- req.vaddr, req.len);
-
- gts = gru_find_lock_gts(req.gseg);
- if (!gts)
- return -EINVAL;
-
- gms = gts->ts_gms;
- gru_unlock_gts(gts);
- gru_flush_tlb_range(gms, req.vaddr, req.len);
-
- return 0;
-}
-
-/*
- * Fetch GSEG statisticss
- */
-long gru_get_gseg_statistics(unsigned long arg)
-{
- struct gru_thread_state *gts;
- struct gru_get_gseg_statistics_req req;
-
- if (copy_from_user(&req, (void __user *)arg, sizeof(req)))
- return -EFAULT;
-
- /*
- * The library creates arrays of contexts for threaded programs.
- * If no gts exists in the array, the context has never been used & all
- * statistics are implicitly 0.
- */
- gts = gru_find_lock_gts(req.gseg);
- if (gts) {
- memcpy(&req.stats, >s->ustats, sizeof(gts->ustats));
- gru_unlock_gts(gts);
- } else {
- memset(&req.stats, 0, sizeof(gts->ustats));
- }
-
- if (copy_to_user((void __user *)arg, &req, sizeof(req)))
- return -EFAULT;
-
- return 0;
-}
-
-/*
- * Register the current task as the user of the GSEG slice.
- * Needed for TLB fault interrupt targeting.
- */
-int gru_set_context_option(unsigned long arg)
-{
- struct gru_thread_state *gts;
- struct gru_set_context_option_req req;
- int ret = 0;
-
- STAT(set_context_option);
- if (copy_from_user(&req, (void __user *)arg, sizeof(req)))
- return -EFAULT;
- gru_dbg(grudev, "op %d, gseg 0x%lx, value1 0x%lx\n", req.op, req.gseg, req.val1);
-
- gts = gru_find_lock_gts(req.gseg);
- if (!gts) {
- gts = gru_alloc_locked_gts(req.gseg);
- if (IS_ERR(gts))
- return PTR_ERR(gts);
- }
-
- switch (req.op) {
- case sco_blade_chiplet:
- /* Select blade/chiplet for GRU context */
- if (req.val0 < -1 || req.val0 >= GRU_CHIPLETS_PER_HUB ||
- req.val1 < -1 || req.val1 >= GRU_MAX_BLADES ||
- (req.val1 >= 0 && !gru_base[req.val1])) {
- ret = -EINVAL;
- } else {
- gts->ts_user_blade_id = req.val1;
- gts->ts_user_chiplet_id = req.val0;
- if (gru_check_context_placement(gts)) {
- gru_unlock_gts(gts);
- gru_unload_context(gts, 1);
- return ret;
- }
- }
- break;
- case sco_gseg_owner:
- /* Register the current task as the GSEG owner */
- gts->ts_tgid_owner = current->tgid;
- break;
- case sco_cch_req_slice:
- /* Set the CCH slice option */
- gts->ts_cch_req_slice = req.val1 & 3;
- break;
- default:
- ret = -EINVAL;
- }
- gru_unlock_gts(gts);
-
- return ret;
-}
diff --git a/drivers/misc/sgi-gru/grufile.c b/drivers/misc/sgi-gru/grufile.c
deleted file mode 100644
index e755690c9805..000000000000
--- a/drivers/misc/sgi-gru/grufile.c
+++ /dev/null
@@ -1,540 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * SN Platform GRU Driver
- *
- * FILE OPERATIONS & DRIVER INITIALIZATION
- *
- * This file supports the user system call for file open, close, mmap, etc.
- * This also incudes the driver initialization code.
- *
- * (C) Copyright 2020 Hewlett Packard Enterprise Development LP
- * Copyright (c) 2008-2014 Silicon Graphics, Inc. All Rights Reserved.
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/slab.h>
-#include <linux/mm.h>
-#include <linux/io.h>
-#include <linux/spinlock.h>
-#include <linux/device.h>
-#include <linux/miscdevice.h>
-#include <linux/interrupt.h>
-#include <linux/proc_fs.h>
-#include <linux/uaccess.h>
-#ifdef CONFIG_X86_64
-#include <asm/uv/uv_irq.h>
-#endif
-#include <asm/uv/uv.h>
-#include "gru.h"
-#include "grulib.h"
-#include "grutables.h"
-
-#include <asm/uv/uv_hub.h>
-#include <asm/uv/uv_mmrs.h>
-
-struct gru_blade_state *gru_base[GRU_MAX_BLADES] __read_mostly;
-unsigned long gru_start_paddr __read_mostly;
-void *gru_start_vaddr __read_mostly;
-unsigned long gru_end_paddr __read_mostly;
-unsigned int gru_max_gids __read_mostly;
-struct gru_stats_s gru_stats;
-
-/* Guaranteed user available resources on each node */
-static int max_user_cbrs, max_user_dsr_bytes;
-
-static struct miscdevice gru_miscdev;
-
-static int gru_supported(void)
-{
- return is_uv_system() &&
- (uv_hub_info->hub_revision < UV3_HUB_REVISION_BASE);
-}
-
-/*
- * gru_vma_close
- *
- * Called when unmapping a device mapping. Frees all gru resources
- * and tables belonging to the vma.
- */
-static void gru_vma_close(struct vm_area_struct *vma)
-{
- struct gru_vma_data *vdata;
- struct gru_thread_state *gts;
- struct list_head *entry, *next;
-
- if (!vma->vm_private_data)
- return;
-
- vdata = vma->vm_private_data;
- vma->vm_private_data = NULL;
- gru_dbg(grudev, "vma %p, file %p, vdata %p\n", vma, vma->vm_file,
- vdata);
- list_for_each_safe(entry, next, &vdata->vd_head) {
- gts =
- list_entry(entry, struct gru_thread_state, ts_next);
- list_del(>s->ts_next);
- mutex_lock(>s->ts_ctxlock);
- if (gts->ts_gru)
- gru_unload_context(gts, 0);
- mutex_unlock(>s->ts_ctxlock);
- gts_drop(gts);
- }
- kfree(vdata);
- STAT(vdata_free);
-}
-
-/*
- * gru_file_mmap
- *
- * Called when mmapping the device. Initializes the vma with a fault handler
- * and private data structure necessary to allocate, track, and free the
- * underlying pages.
- */
-static int gru_file_mmap(struct file *file, struct vm_area_struct *vma)
-{
- if ((vma->vm_flags & (VM_SHARED | VM_WRITE)) != (VM_SHARED | VM_WRITE))
- return -EPERM;
-
- if (vma->vm_start & (GRU_GSEG_PAGESIZE - 1) ||
- vma->vm_end & (GRU_GSEG_PAGESIZE - 1))
- return -EINVAL;
-
- vm_flags_set(vma, VM_IO | VM_PFNMAP | VM_LOCKED |
- VM_DONTCOPY | VM_DONTEXPAND | VM_DONTDUMP);
- vma->vm_page_prot = PAGE_SHARED;
- vma->vm_ops = &gru_vm_ops;
-
- vma->vm_private_data = gru_alloc_vma_data(vma, 0);
- if (!vma->vm_private_data)
- return -ENOMEM;
-
- gru_dbg(grudev, "file %p, vaddr 0x%lx, vma %p, vdata %p\n",
- file, vma->vm_start, vma, vma->vm_private_data);
- return 0;
-}
-
-/*
- * Create a new GRU context
- */
-static int gru_create_new_context(unsigned long arg)
-{
- struct gru_create_context_req req;
- struct vm_area_struct *vma;
- struct gru_vma_data *vdata;
- int ret = -EINVAL;
-
- if (copy_from_user(&req, (void __user *)arg, sizeof(req)))
- return -EFAULT;
-
- if (req.data_segment_bytes > max_user_dsr_bytes)
- return -EINVAL;
- if (req.control_blocks > max_user_cbrs || !req.maximum_thread_count)
- return -EINVAL;
-
- if (!(req.options & GRU_OPT_MISS_MASK))
- req.options |= GRU_OPT_MISS_FMM_INTR;
-
- mmap_write_lock(current->mm);
- vma = gru_find_vma(req.gseg);
- if (vma) {
- vdata = vma->vm_private_data;
- vdata->vd_user_options = req.options;
- vdata->vd_dsr_au_count =
- GRU_DS_BYTES_TO_AU(req.data_segment_bytes);
- vdata->vd_cbr_au_count = GRU_CB_COUNT_TO_AU(req.control_blocks);
- vdata->vd_tlb_preload_count = req.tlb_preload_count;
- ret = 0;
- }
- mmap_write_unlock(current->mm);
-
- return ret;
-}
-
-/*
- * Get GRU configuration info (temp - for emulator testing)
- */
-static long gru_get_config_info(unsigned long arg)
-{
- struct gru_config_info info;
- int nodesperblade;
-
- if (num_online_nodes() > 1 &&
- (uv_node_to_blade_id(1) == uv_node_to_blade_id(0)))
- nodesperblade = 2;
- else
- nodesperblade = 1;
- memset(&info, 0, sizeof(info));
- info.cpus = num_online_cpus();
- info.nodes = num_online_nodes();
- info.blades = info.nodes / nodesperblade;
- info.chiplets = GRU_CHIPLETS_PER_BLADE * info.blades;
-
- if (copy_to_user((void __user *)arg, &info, sizeof(info)))
- return -EFAULT;
- return 0;
-}
-
-/*
- * gru_file_unlocked_ioctl
- *
- * Called to update file attributes via IOCTL calls.
- */
-static long gru_file_unlocked_ioctl(struct file *file, unsigned int req,
- unsigned long arg)
-{
- int err = -EBADRQC;
-
- gru_dbg(grudev, "file %p, req 0x%x, 0x%lx\n", file, req, arg);
-
- switch (req) {
- case GRU_CREATE_CONTEXT:
- err = gru_create_new_context(arg);
- break;
- case GRU_SET_CONTEXT_OPTION:
- err = gru_set_context_option(arg);
- break;
- case GRU_USER_GET_EXCEPTION_DETAIL:
- err = gru_get_exception_detail(arg);
- break;
- case GRU_USER_UNLOAD_CONTEXT:
- err = gru_user_unload_context(arg);
- break;
- case GRU_USER_FLUSH_TLB:
- err = gru_user_flush_tlb(arg);
- break;
- case GRU_USER_CALL_OS:
- err = gru_handle_user_call_os(arg);
- break;
- case GRU_GET_GSEG_STATISTICS:
- err = gru_get_gseg_statistics(arg);
- break;
- case GRU_KTEST:
- err = gru_ktest(arg);
- break;
- case GRU_GET_CONFIG_INFO:
- err = gru_get_config_info(arg);
- break;
- case GRU_DUMP_CHIPLET_STATE:
- err = gru_dump_chiplet_request(arg);
- break;
- }
- return err;
-}
-
-/*
- * Called at init time to build tables for all GRUs that are present in the
- * system.
- */
-static void gru_init_chiplet(struct gru_state *gru, unsigned long paddr,
- void *vaddr, int blade_id, int chiplet_id)
-{
- spin_lock_init(&gru->gs_lock);
- spin_lock_init(&gru->gs_asid_lock);
- gru->gs_gru_base_paddr = paddr;
- gru->gs_gru_base_vaddr = vaddr;
- gru->gs_gid = blade_id * GRU_CHIPLETS_PER_BLADE + chiplet_id;
- gru->gs_blade = gru_base[blade_id];
- gru->gs_blade_id = blade_id;
- gru->gs_chiplet_id = chiplet_id;
- gru->gs_cbr_map = (GRU_CBR_AU == 64) ? ~0 : (1UL << GRU_CBR_AU) - 1;
- gru->gs_dsr_map = (1UL << GRU_DSR_AU) - 1;
- gru->gs_asid_limit = MAX_ASID;
- gru_tgh_flush_init(gru);
- if (gru->gs_gid >= gru_max_gids)
- gru_max_gids = gru->gs_gid + 1;
- gru_dbg(grudev, "bid %d, gid %d, vaddr %p (0x%lx)\n",
- blade_id, gru->gs_gid, gru->gs_gru_base_vaddr,
- gru->gs_gru_base_paddr);
-}
-
-static int gru_init_tables(unsigned long gru_base_paddr, void *gru_base_vaddr)
-{
- int pnode, nid, bid, chip;
- int cbrs, dsrbytes, n;
- int order = get_order(sizeof(struct gru_blade_state));
- struct page *page;
- struct gru_state *gru;
- unsigned long paddr;
- void *vaddr;
-
- max_user_cbrs = GRU_NUM_CB;
- max_user_dsr_bytes = GRU_NUM_DSR_BYTES;
- for_each_possible_blade(bid) {
- pnode = uv_blade_to_pnode(bid);
- nid = uv_blade_to_memory_nid(bid);/* -1 if no memory on blade */
- page = alloc_pages_node(nid, GFP_KERNEL, order);
- if (!page)
- goto fail;
- gru_base[bid] = page_address(page);
- memset(gru_base[bid], 0, sizeof(struct gru_blade_state));
- gru_base[bid]->bs_lru_gru = &gru_base[bid]->bs_grus[0];
- spin_lock_init(&gru_base[bid]->bs_lock);
- init_rwsem(&gru_base[bid]->bs_kgts_sema);
-
- dsrbytes = 0;
- cbrs = 0;
- for (gru = gru_base[bid]->bs_grus, chip = 0;
- chip < GRU_CHIPLETS_PER_BLADE;
- chip++, gru++) {
- paddr = gru_chiplet_paddr(gru_base_paddr, pnode, chip);
- vaddr = gru_chiplet_vaddr(gru_base_vaddr, pnode, chip);
- gru_init_chiplet(gru, paddr, vaddr, bid, chip);
- n = hweight64(gru->gs_cbr_map) * GRU_CBR_AU_SIZE;
- cbrs = max(cbrs, n);
- n = hweight64(gru->gs_dsr_map) * GRU_DSR_AU_BYTES;
- dsrbytes = max(dsrbytes, n);
- }
- max_user_cbrs = min(max_user_cbrs, cbrs);
- max_user_dsr_bytes = min(max_user_dsr_bytes, dsrbytes);
- }
-
- return 0;
-
-fail:
- for (bid--; bid >= 0; bid--)
- free_pages((unsigned long)gru_base[bid], order);
- return -ENOMEM;
-}
-
-static void gru_free_tables(void)
-{
- int bid;
- int order = get_order(sizeof(struct gru_state) *
- GRU_CHIPLETS_PER_BLADE);
-
- for (bid = 0; bid < GRU_MAX_BLADES; bid++)
- free_pages((unsigned long)gru_base[bid], order);
-}
-
-static unsigned long gru_chiplet_cpu_to_mmr(int chiplet, int cpu, int *corep)
-{
- unsigned long mmr = 0;
- int core;
-
- /*
- * We target the cores of a blade and not the hyperthreads themselves.
- * There is a max of 8 cores per socket and 2 sockets per blade,
- * making for a max total of 16 cores (i.e., 16 CPUs without
- * hyperthreading and 32 CPUs with hyperthreading).
- */
- core = uv_cpu_core_number(cpu) + UV_MAX_INT_CORES * uv_cpu_socket_number(cpu);
- if (core >= GRU_NUM_TFM || uv_cpu_ht_number(cpu))
- return 0;
-
- if (chiplet == 0) {
- mmr = UVH_GR0_TLB_INT0_CONFIG +
- core * (UVH_GR0_TLB_INT1_CONFIG - UVH_GR0_TLB_INT0_CONFIG);
- } else if (chiplet == 1) {
- mmr = UVH_GR1_TLB_INT0_CONFIG +
- core * (UVH_GR1_TLB_INT1_CONFIG - UVH_GR1_TLB_INT0_CONFIG);
- } else {
- BUG();
- }
-
- *corep = core;
- return mmr;
-}
-
-static int gru_chiplet_setup_tlb_irq(int chiplet, char *irq_name,
- irq_handler_t irq_handler, int cpu, int blade)
-{
- unsigned long mmr;
- int irq, core;
- int ret;
-
- mmr = gru_chiplet_cpu_to_mmr(chiplet, cpu, &core);
- if (mmr == 0)
- return 0;
-
- irq = uv_setup_irq(irq_name, cpu, blade, mmr, UV_AFFINITY_CPU);
- if (irq < 0) {
- printk(KERN_ERR "%s: uv_setup_irq failed, errno=%d\n",
- GRU_DRIVER_ID_STR, -irq);
- return irq;
- }
-
- ret = request_irq(irq, irq_handler, 0, irq_name, NULL);
- if (ret) {
- uv_teardown_irq(irq);
- printk(KERN_ERR "%s: request_irq failed, errno=%d\n",
- GRU_DRIVER_ID_STR, -ret);
- return ret;
- }
- gru_base[blade]->bs_grus[chiplet].gs_irq[core] = irq;
- return 0;
-}
-
-static void gru_chiplet_teardown_tlb_irq(int chiplet, int cpu, int blade)
-{
- int irq, core;
- unsigned long mmr;
-
- mmr = gru_chiplet_cpu_to_mmr(chiplet, cpu, &core);
- if (mmr) {
- irq = gru_base[blade]->bs_grus[chiplet].gs_irq[core];
- if (irq) {
- free_irq(irq, NULL);
- uv_teardown_irq(irq);
- }
- }
-}
-
-static void gru_teardown_tlb_irqs(void)
-{
- int blade;
- int cpu;
-
- for_each_online_cpu(cpu) {
- blade = uv_cpu_to_blade_id(cpu);
- gru_chiplet_teardown_tlb_irq(0, cpu, blade);
- gru_chiplet_teardown_tlb_irq(1, cpu, blade);
- }
- for_each_possible_blade(blade) {
- if (uv_blade_nr_possible_cpus(blade))
- continue;
- gru_chiplet_teardown_tlb_irq(0, 0, blade);
- gru_chiplet_teardown_tlb_irq(1, 0, blade);
- }
-}
-
-static int gru_setup_tlb_irqs(void)
-{
- int blade;
- int cpu;
- int ret;
-
- for_each_online_cpu(cpu) {
- blade = uv_cpu_to_blade_id(cpu);
- ret = gru_chiplet_setup_tlb_irq(0, "GRU0_TLB", gru0_intr, cpu, blade);
- if (ret != 0)
- goto exit1;
-
- ret = gru_chiplet_setup_tlb_irq(1, "GRU1_TLB", gru1_intr, cpu, blade);
- if (ret != 0)
- goto exit1;
- }
- for_each_possible_blade(blade) {
- if (uv_blade_nr_possible_cpus(blade))
- continue;
- ret = gru_chiplet_setup_tlb_irq(0, "GRU0_TLB", gru_intr_mblade, 0, blade);
- if (ret != 0)
- goto exit1;
-
- ret = gru_chiplet_setup_tlb_irq(1, "GRU1_TLB", gru_intr_mblade, 0, blade);
- if (ret != 0)
- goto exit1;
- }
-
- return 0;
-
-exit1:
- gru_teardown_tlb_irqs();
- return ret;
-}
-
-/*
- * gru_init
- *
- * Called at boot or module load time to initialize the GRUs.
- */
-static int __init gru_init(void)
-{
- int ret;
-
- if (!gru_supported())
- return 0;
-
- gru_start_paddr = uv_read_local_mmr(UVH_RH_GAM_GRU_OVERLAY_CONFIG) &
- 0x7fffffffffffUL;
- gru_start_vaddr = __va(gru_start_paddr);
- gru_end_paddr = gru_start_paddr + GRU_MAX_BLADES * GRU_SIZE;
- printk(KERN_INFO "GRU space: 0x%lx - 0x%lx\n",
- gru_start_paddr, gru_end_paddr);
- ret = misc_register(&gru_miscdev);
- if (ret) {
- printk(KERN_ERR "%s: misc_register failed\n",
- GRU_DRIVER_ID_STR);
- goto exit0;
- }
-
- ret = gru_proc_init();
- if (ret) {
- printk(KERN_ERR "%s: proc init failed\n", GRU_DRIVER_ID_STR);
- goto exit1;
- }
-
- ret = gru_init_tables(gru_start_paddr, gru_start_vaddr);
- if (ret) {
- printk(KERN_ERR "%s: init tables failed\n", GRU_DRIVER_ID_STR);
- goto exit2;
- }
-
- ret = gru_setup_tlb_irqs();
- if (ret != 0)
- goto exit3;
-
- gru_kservices_init();
-
- printk(KERN_INFO "%s: v%s\n", GRU_DRIVER_ID_STR,
- GRU_DRIVER_VERSION_STR);
- return 0;
-
-exit3:
- gru_free_tables();
-exit2:
- gru_proc_exit();
-exit1:
- misc_deregister(&gru_miscdev);
-exit0:
- return ret;
-
-}
-
-static void __exit gru_exit(void)
-{
- if (!gru_supported())
- return;
-
- gru_teardown_tlb_irqs();
- gru_kservices_exit();
- gru_free_tables();
- misc_deregister(&gru_miscdev);
- gru_proc_exit();
- mmu_notifier_synchronize();
-}
-
-static const struct file_operations gru_fops = {
- .owner = THIS_MODULE,
- .unlocked_ioctl = gru_file_unlocked_ioctl,
- .mmap = gru_file_mmap,
- .llseek = noop_llseek,
-};
-
-static struct miscdevice gru_miscdev = {
- .minor = MISC_DYNAMIC_MINOR,
- .name = "gru",
- .fops = &gru_fops,
-};
-
-const struct vm_operations_struct gru_vm_ops = {
- .close = gru_vma_close,
- .fault = gru_fault,
-};
-
-#ifndef MODULE
-fs_initcall(gru_init);
-#else
-module_init(gru_init);
-#endif
-module_exit(gru_exit);
-
-module_param(gru_options, ulong, 0644);
-MODULE_PARM_DESC(gru_options, "Various debug options");
-
-MODULE_AUTHOR("Silicon Graphics, Inc.");
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION(GRU_DRIVER_ID_STR GRU_DRIVER_VERSION_STR);
-MODULE_VERSION(GRU_DRIVER_VERSION_STR);
-
diff --git a/drivers/misc/sgi-gru/gruhandles.c b/drivers/misc/sgi-gru/gruhandles.c
deleted file mode 100644
index 695316a83b01..000000000000
--- a/drivers/misc/sgi-gru/gruhandles.c
+++ /dev/null
@@ -1,192 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * GRU KERNEL MCS INSTRUCTIONS
- *
- * Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
- */
-
-#include <linux/kernel.h>
-#include "gru.h"
-#include "grulib.h"
-#include "grutables.h"
-
-/* 10 sec */
-#include <linux/sync_core.h>
-#include <asm/tsc.h>
-#define GRU_OPERATION_TIMEOUT ((cycles_t) tsc_khz*10*1000)
-#define CLKS2NSEC(c) ((c) * 1000000 / tsc_khz)
-
-/* Extract the status field from a kernel handle */
-#define GET_MSEG_HANDLE_STATUS(h) (((*(unsigned long *)(h)) >> 16) & 3)
-
-struct mcs_op_statistic mcs_op_statistics[mcsop_last];
-
-static void update_mcs_stats(enum mcs_op op, unsigned long clks)
-{
- unsigned long nsec;
-
- nsec = CLKS2NSEC(clks);
- atomic_long_inc(&mcs_op_statistics[op].count);
- atomic_long_add(nsec, &mcs_op_statistics[op].total);
- if (mcs_op_statistics[op].max < nsec)
- mcs_op_statistics[op].max = nsec;
-}
-
-static void start_instruction(void *h)
-{
- unsigned long *w0 = h;
-
- wmb(); /* setting CMD/STATUS bits must be last */
- *w0 = *w0 | 0x20001;
- gru_flush_cache(h);
-}
-
-static void report_instruction_timeout(void *h)
-{
- unsigned long goff = GSEGPOFF((unsigned long)h);
- char *id = "???";
-
- if (TYPE_IS(CCH, goff))
- id = "CCH";
- else if (TYPE_IS(TGH, goff))
- id = "TGH";
- else if (TYPE_IS(TFH, goff))
- id = "TFH";
-
- panic(KERN_ALERT "GRU %p (%s) is malfunctioning\n", h, id);
-}
-
-static int wait_instruction_complete(void *h, enum mcs_op opc)
-{
- int status;
- unsigned long start_time = get_cycles();
-
- while (1) {
- cpu_relax();
- status = GET_MSEG_HANDLE_STATUS(h);
- if (status != CCHSTATUS_ACTIVE)
- break;
- if (GRU_OPERATION_TIMEOUT < (get_cycles() - start_time)) {
- report_instruction_timeout(h);
- start_time = get_cycles();
- }
- }
- if (gru_options & OPT_STATS)
- update_mcs_stats(opc, get_cycles() - start_time);
- return status;
-}
-
-int cch_allocate(struct gru_context_configuration_handle *cch)
-{
- int ret;
-
- cch->opc = CCHOP_ALLOCATE;
- start_instruction(cch);
- ret = wait_instruction_complete(cch, cchop_allocate);
-
- /*
- * Stop speculation into the GSEG being mapped by the previous ALLOCATE.
- * The GSEG memory does not exist until the ALLOCATE completes.
- */
- sync_core();
- return ret;
-}
-
-int cch_start(struct gru_context_configuration_handle *cch)
-{
- cch->opc = CCHOP_START;
- start_instruction(cch);
- return wait_instruction_complete(cch, cchop_start);
-}
-
-int cch_interrupt(struct gru_context_configuration_handle *cch)
-{
- cch->opc = CCHOP_INTERRUPT;
- start_instruction(cch);
- return wait_instruction_complete(cch, cchop_interrupt);
-}
-
-int cch_deallocate(struct gru_context_configuration_handle *cch)
-{
- int ret;
-
- cch->opc = CCHOP_DEALLOCATE;
- start_instruction(cch);
- ret = wait_instruction_complete(cch, cchop_deallocate);
-
- /*
- * Stop speculation into the GSEG being unmapped by the previous
- * DEALLOCATE.
- */
- sync_core();
- return ret;
-}
-
-int cch_interrupt_sync(struct gru_context_configuration_handle
- *cch)
-{
- cch->opc = CCHOP_INTERRUPT_SYNC;
- start_instruction(cch);
- return wait_instruction_complete(cch, cchop_interrupt_sync);
-}
-
-int tgh_invalidate(struct gru_tlb_global_handle *tgh,
- unsigned long vaddr, unsigned long vaddrmask,
- int asid, int pagesize, int global, int n,
- unsigned short ctxbitmap)
-{
- tgh->vaddr = vaddr;
- tgh->asid = asid;
- tgh->pagesize = pagesize;
- tgh->n = n;
- tgh->global = global;
- tgh->vaddrmask = vaddrmask;
- tgh->ctxbitmap = ctxbitmap;
- tgh->opc = TGHOP_TLBINV;
- start_instruction(tgh);
- return wait_instruction_complete(tgh, tghop_invalidate);
-}
-
-int tfh_write_only(struct gru_tlb_fault_handle *tfh,
- unsigned long paddr, int gaa,
- unsigned long vaddr, int asid, int dirty,
- int pagesize)
-{
- tfh->fillasid = asid;
- tfh->fillvaddr = vaddr;
- tfh->pfn = paddr >> GRU_PADDR_SHIFT;
- tfh->gaa = gaa;
- tfh->dirty = dirty;
- tfh->pagesize = pagesize;
- tfh->opc = TFHOP_WRITE_ONLY;
- start_instruction(tfh);
- return wait_instruction_complete(tfh, tfhop_write_only);
-}
-
-void tfh_write_restart(struct gru_tlb_fault_handle *tfh,
- unsigned long paddr, int gaa,
- unsigned long vaddr, int asid, int dirty,
- int pagesize)
-{
- tfh->fillasid = asid;
- tfh->fillvaddr = vaddr;
- tfh->pfn = paddr >> GRU_PADDR_SHIFT;
- tfh->gaa = gaa;
- tfh->dirty = dirty;
- tfh->pagesize = pagesize;
- tfh->opc = TFHOP_WRITE_RESTART;
- start_instruction(tfh);
-}
-
-void tfh_user_polling_mode(struct gru_tlb_fault_handle *tfh)
-{
- tfh->opc = TFHOP_USER_POLLING_MODE;
- start_instruction(tfh);
-}
-
-void tfh_exception(struct gru_tlb_fault_handle *tfh)
-{
- tfh->opc = TFHOP_EXCEPTION;
- start_instruction(tfh);
-}
-
diff --git a/drivers/misc/sgi-gru/gruhandles.h b/drivers/misc/sgi-gru/gruhandles.h
deleted file mode 100644
index 5a498bf8d003..000000000000
--- a/drivers/misc/sgi-gru/gruhandles.h
+++ /dev/null
@@ -1,517 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/*
- * SN Platform GRU Driver
- *
- * GRU HANDLE DEFINITION
- *
- * Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
- */
-
-#ifndef __GRUHANDLES_H__
-#define __GRUHANDLES_H__
-#include "gru_instructions.h"
-
-/*
- * Manifest constants for GRU Memory Map
- */
-#define GRU_GSEG0_BASE 0
-#define GRU_MCS_BASE (64 * 1024 * 1024)
-#define GRU_SIZE (128UL * 1024 * 1024)
-
-/* Handle & resource counts */
-#define GRU_NUM_CB 128
-#define GRU_NUM_DSR_BYTES (32 * 1024)
-#define GRU_NUM_TFM 16
-#define GRU_NUM_TGH 24
-#define GRU_NUM_CBE 128
-#define GRU_NUM_TFH 128
-#define GRU_NUM_CCH 16
-
-/* Maximum resource counts that can be reserved by user programs */
-#define GRU_NUM_USER_CBR GRU_NUM_CBE
-#define GRU_NUM_USER_DSR_BYTES GRU_NUM_DSR_BYTES
-
-/* Bytes per handle & handle stride. Code assumes all cb, tfh, cbe handles
- * are the same */
-#define GRU_HANDLE_BYTES 64
-#define GRU_HANDLE_STRIDE 256
-
-/* Base addresses of handles */
-#define GRU_TFM_BASE (GRU_MCS_BASE + 0x00000)
-#define GRU_TGH_BASE (GRU_MCS_BASE + 0x08000)
-#define GRU_CBE_BASE (GRU_MCS_BASE + 0x10000)
-#define GRU_TFH_BASE (GRU_MCS_BASE + 0x18000)
-#define GRU_CCH_BASE (GRU_MCS_BASE + 0x20000)
-
-/* User gseg constants */
-#define GRU_GSEG_STRIDE (4 * 1024 * 1024)
-#define GSEG_BASE(a) ((a) & ~(GRU_GSEG_PAGESIZE - 1))
-
-/* Data segment constants */
-#define GRU_DSR_AU_BYTES 1024
-#define GRU_DSR_CL (GRU_NUM_DSR_BYTES / GRU_CACHE_LINE_BYTES)
-#define GRU_DSR_AU_CL (GRU_DSR_AU_BYTES / GRU_CACHE_LINE_BYTES)
-#define GRU_DSR_AU (GRU_NUM_DSR_BYTES / GRU_DSR_AU_BYTES)
-
-/* Control block constants */
-#define GRU_CBR_AU_SIZE 2
-#define GRU_CBR_AU (GRU_NUM_CBE / GRU_CBR_AU_SIZE)
-
-/* Convert resource counts to the number of AU */
-#define GRU_DS_BYTES_TO_AU(n) DIV_ROUND_UP(n, GRU_DSR_AU_BYTES)
-#define GRU_CB_COUNT_TO_AU(n) DIV_ROUND_UP(n, GRU_CBR_AU_SIZE)
-
-/* UV limits */
-#define GRU_CHIPLETS_PER_HUB 2
-#define GRU_HUBS_PER_BLADE 1
-#define GRU_CHIPLETS_PER_BLADE (GRU_HUBS_PER_BLADE * GRU_CHIPLETS_PER_HUB)
-
-/* User GRU Gseg offsets */
-#define GRU_CB_BASE 0
-#define GRU_CB_LIMIT (GRU_CB_BASE + GRU_HANDLE_STRIDE * GRU_NUM_CBE)
-#define GRU_DS_BASE 0x20000
-#define GRU_DS_LIMIT (GRU_DS_BASE + GRU_NUM_DSR_BYTES)
-
-/* Convert a GRU physical address to the chiplet offset */
-#define GSEGPOFF(h) ((h) & (GRU_SIZE - 1))
-
-/* Convert an arbitrary handle address to the beginning of the GRU segment */
-#define GRUBASE(h) ((void *)((unsigned long)(h) & ~(GRU_SIZE - 1)))
-
-/* Test a valid handle address to determine the type */
-#define TYPE_IS(hn, h) ((h) >= GRU_##hn##_BASE && (h) < \
- GRU_##hn##_BASE + GRU_NUM_##hn * GRU_HANDLE_STRIDE && \
- (((h) & (GRU_HANDLE_STRIDE - 1)) == 0))
-
-
-/* General addressing macros. */
-static inline void *get_gseg_base_address(void *base, int ctxnum)
-{
- return (void *)(base + GRU_GSEG0_BASE + GRU_GSEG_STRIDE * ctxnum);
-}
-
-static inline void *get_gseg_base_address_cb(void *base, int ctxnum, int line)
-{
- return (void *)(get_gseg_base_address(base, ctxnum) +
- GRU_CB_BASE + GRU_HANDLE_STRIDE * line);
-}
-
-static inline void *get_gseg_base_address_ds(void *base, int ctxnum, int line)
-{
- return (void *)(get_gseg_base_address(base, ctxnum) + GRU_DS_BASE +
- GRU_CACHE_LINE_BYTES * line);
-}
-
-static inline struct gru_tlb_fault_map *get_tfm(void *base, int ctxnum)
-{
- return (struct gru_tlb_fault_map *)(base + GRU_TFM_BASE +
- ctxnum * GRU_HANDLE_STRIDE);
-}
-
-static inline struct gru_tlb_global_handle *get_tgh(void *base, int ctxnum)
-{
- return (struct gru_tlb_global_handle *)(base + GRU_TGH_BASE +
- ctxnum * GRU_HANDLE_STRIDE);
-}
-
-static inline struct gru_control_block_extended *get_cbe(void *base, int ctxnum)
-{
- return (struct gru_control_block_extended *)(base + GRU_CBE_BASE +
- ctxnum * GRU_HANDLE_STRIDE);
-}
-
-static inline struct gru_tlb_fault_handle *get_tfh(void *base, int ctxnum)
-{
- return (struct gru_tlb_fault_handle *)(base + GRU_TFH_BASE +
- ctxnum * GRU_HANDLE_STRIDE);
-}
-
-static inline struct gru_context_configuration_handle *get_cch(void *base,
- int ctxnum)
-{
- return (struct gru_context_configuration_handle *)(base +
- GRU_CCH_BASE + ctxnum * GRU_HANDLE_STRIDE);
-}
-
-static inline unsigned long get_cb_number(void *cb)
-{
- return (((unsigned long)cb - GRU_CB_BASE) % GRU_GSEG_PAGESIZE) /
- GRU_HANDLE_STRIDE;
-}
-
-/* byte offset to a specific GRU chiplet. (p=pnode, c=chiplet (0 or 1)*/
-static inline unsigned long gru_chiplet_paddr(unsigned long paddr, int pnode,
- int chiplet)
-{
- return paddr + GRU_SIZE * (2 * pnode + chiplet);
-}
-
-static inline void *gru_chiplet_vaddr(void *vaddr, int pnode, int chiplet)
-{
- return vaddr + GRU_SIZE * (2 * pnode + chiplet);
-}
-
-static inline struct gru_control_block_extended *gru_tfh_to_cbe(
- struct gru_tlb_fault_handle *tfh)
-{
- unsigned long cbe;
-
- cbe = (unsigned long)tfh - GRU_TFH_BASE + GRU_CBE_BASE;
- return (struct gru_control_block_extended*)cbe;
-}
-
-
-
-
-/*
- * Global TLB Fault Map
- * Bitmap of outstanding TLB misses needing interrupt/polling service.
- *
- */
-struct gru_tlb_fault_map {
- unsigned long fault_bits[BITS_TO_LONGS(GRU_NUM_CBE)];
- unsigned long fill0[2];
- unsigned long done_bits[BITS_TO_LONGS(GRU_NUM_CBE)];
- unsigned long fill1[2];
-};
-
-/*
- * TGH - TLB Global Handle
- * Used for TLB flushing.
- *
- */
-struct gru_tlb_global_handle {
- unsigned int cmd:1; /* DW 0 */
- unsigned int delresp:1;
- unsigned int opc:1;
- unsigned int fill1:5;
-
- unsigned int fill2:8;
-
- unsigned int status:2;
- unsigned long fill3:2;
- unsigned int state:3;
- unsigned long fill4:1;
-
- unsigned int cause:3;
- unsigned long fill5:37;
-
- unsigned long vaddr:64; /* DW 1 */
-
- unsigned int asid:24; /* DW 2 */
- unsigned int fill6:8;
-
- unsigned int pagesize:5;
- unsigned int fill7:11;
-
- unsigned int global:1;
- unsigned int fill8:15;
-
- unsigned long vaddrmask:39; /* DW 3 */
- unsigned int fill9:9;
- unsigned int n:10;
- unsigned int fill10:6;
-
- unsigned int ctxbitmap:16; /* DW4 */
- unsigned long fill11[3];
-};
-
-enum gru_tgh_cmd {
- TGHCMD_START
-};
-
-enum gru_tgh_opc {
- TGHOP_TLBNOP,
- TGHOP_TLBINV
-};
-
-enum gru_tgh_status {
- TGHSTATUS_IDLE,
- TGHSTATUS_EXCEPTION,
- TGHSTATUS_ACTIVE
-};
-
-enum gru_tgh_state {
- TGHSTATE_IDLE,
- TGHSTATE_PE_INVAL,
- TGHSTATE_INTERRUPT_INVAL,
- TGHSTATE_WAITDONE,
- TGHSTATE_RESTART_CTX,
-};
-
-enum gru_tgh_cause {
- TGHCAUSE_RR_ECC,
- TGHCAUSE_TLB_ECC,
- TGHCAUSE_LRU_ECC,
- TGHCAUSE_PS_ECC,
- TGHCAUSE_MUL_ERR,
- TGHCAUSE_DATA_ERR,
- TGHCAUSE_SW_FORCE
-};
-
-
-/*
- * TFH - TLB Global Handle
- * Used for TLB dropins into the GRU TLB.
- *
- */
-struct gru_tlb_fault_handle {
- unsigned int cmd:1; /* DW 0 - low 32*/
- unsigned int delresp:1;
- unsigned int fill0:2;
- unsigned int opc:3;
- unsigned int fill1:9;
-
- unsigned int status:2;
- unsigned int fill2:2;
- unsigned int state:3;
- unsigned int fill3:1;
-
- unsigned int cause:6;
- unsigned int cb_int:1;
- unsigned int fill4:1;
-
- unsigned int indexway:12; /* DW 0 - high 32 */
- unsigned int fill5:4;
-
- unsigned int ctxnum:4;
- unsigned int fill6:12;
-
- unsigned long missvaddr:64; /* DW 1 */
-
- unsigned int missasid:24; /* DW 2 */
- unsigned int fill7:8;
- unsigned int fillasid:24;
- unsigned int dirty:1;
- unsigned int gaa:2;
- unsigned long fill8:5;
-
- unsigned long pfn:41; /* DW 3 */
- unsigned int fill9:7;
- unsigned int pagesize:5;
- unsigned int fill10:11;
-
- unsigned long fillvaddr:64; /* DW 4 */
-
- unsigned long fill11[3];
-};
-
-enum gru_tfh_opc {
- TFHOP_NOOP,
- TFHOP_RESTART,
- TFHOP_WRITE_ONLY,
- TFHOP_WRITE_RESTART,
- TFHOP_EXCEPTION,
- TFHOP_USER_POLLING_MODE = 7,
-};
-
-enum tfh_status {
- TFHSTATUS_IDLE,
- TFHSTATUS_EXCEPTION,
- TFHSTATUS_ACTIVE,
-};
-
-enum tfh_state {
- TFHSTATE_INACTIVE,
- TFHSTATE_IDLE,
- TFHSTATE_MISS_UPM,
- TFHSTATE_MISS_FMM,
- TFHSTATE_HW_ERR,
- TFHSTATE_WRITE_TLB,
- TFHSTATE_RESTART_CBR,
-};
-
-/* TFH cause bits */
-enum tfh_cause {
- TFHCAUSE_NONE,
- TFHCAUSE_TLB_MISS,
- TFHCAUSE_TLB_MOD,
- TFHCAUSE_HW_ERROR_RR,
- TFHCAUSE_HW_ERROR_MAIN_ARRAY,
- TFHCAUSE_HW_ERROR_VALID,
- TFHCAUSE_HW_ERROR_PAGESIZE,
- TFHCAUSE_INSTRUCTION_EXCEPTION,
- TFHCAUSE_UNCORRECTIBLE_ERROR,
-};
-
-/* GAA values */
-#define GAA_RAM 0x0
-#define GAA_NCRAM 0x2
-#define GAA_MMIO 0x1
-#define GAA_REGISTER 0x3
-
-/* GRU paddr shift for pfn. (NOTE: shift is NOT by actual pagesize) */
-#define GRU_PADDR_SHIFT 12
-
-/*
- * Context Configuration handle
- * Used to allocate resources to a GSEG context.
- *
- */
-struct gru_context_configuration_handle {
- unsigned int cmd:1; /* DW0 */
- unsigned int delresp:1;
- unsigned int opc:3;
- unsigned int unmap_enable:1;
- unsigned int req_slice_set_enable:1;
- unsigned int req_slice:2;
- unsigned int cb_int_enable:1;
- unsigned int tlb_int_enable:1;
- unsigned int tfm_fault_bit_enable:1;
- unsigned int tlb_int_select:4;
-
- unsigned int status:2;
- unsigned int state:2;
- unsigned int reserved2:4;
-
- unsigned int cause:4;
- unsigned int tfm_done_bit_enable:1;
- unsigned int unused:3;
-
- unsigned int dsr_allocation_map;
-
- unsigned long cbr_allocation_map; /* DW1 */
-
- unsigned int asid[8]; /* DW 2 - 5 */
- unsigned short sizeavail[8]; /* DW 6 - 7 */
-} __attribute__ ((packed));
-
-enum gru_cch_opc {
- CCHOP_START = 1,
- CCHOP_ALLOCATE,
- CCHOP_INTERRUPT,
- CCHOP_DEALLOCATE,
- CCHOP_INTERRUPT_SYNC,
-};
-
-enum gru_cch_status {
- CCHSTATUS_IDLE,
- CCHSTATUS_EXCEPTION,
- CCHSTATUS_ACTIVE,
-};
-
-enum gru_cch_state {
- CCHSTATE_INACTIVE,
- CCHSTATE_MAPPED,
- CCHSTATE_ACTIVE,
- CCHSTATE_INTERRUPTED,
-};
-
-/* CCH Exception cause */
-enum gru_cch_cause {
- CCHCAUSE_REGION_REGISTER_WRITE_ERROR = 1,
- CCHCAUSE_ILLEGAL_OPCODE = 2,
- CCHCAUSE_INVALID_START_REQUEST = 3,
- CCHCAUSE_INVALID_ALLOCATION_REQUEST = 4,
- CCHCAUSE_INVALID_DEALLOCATION_REQUEST = 5,
- CCHCAUSE_INVALID_INTERRUPT_REQUEST = 6,
- CCHCAUSE_CCH_BUSY = 7,
- CCHCAUSE_NO_CBRS_TO_ALLOCATE = 8,
- CCHCAUSE_BAD_TFM_CONFIG = 9,
- CCHCAUSE_CBR_RESOURCES_OVERSUBSCRIPED = 10,
- CCHCAUSE_DSR_RESOURCES_OVERSUBSCRIPED = 11,
- CCHCAUSE_CBR_DEALLOCATION_ERROR = 12,
-};
-/*
- * CBE - Control Block Extended
- * Maintains internal GRU state for active CBs.
- *
- */
-struct gru_control_block_extended {
- unsigned int reserved0:1; /* DW 0 - low */
- unsigned int imacpy:3;
- unsigned int reserved1:4;
- unsigned int xtypecpy:3;
- unsigned int iaa0cpy:2;
- unsigned int iaa1cpy:2;
- unsigned int reserved2:1;
- unsigned int opccpy:8;
- unsigned int exopccpy:8;
-
- unsigned int idef2cpy:22; /* DW 0 - high */
- unsigned int reserved3:10;
-
- unsigned int idef4cpy:22; /* DW 1 */
- unsigned int reserved4:10;
- unsigned int idef4upd:22;
- unsigned int reserved5:10;
-
- unsigned long idef1upd:64; /* DW 2 */
-
- unsigned long idef5cpy:64; /* DW 3 */
-
- unsigned long idef6cpy:64; /* DW 4 */
-
- unsigned long idef3upd:64; /* DW 5 */
-
- unsigned long idef5upd:64; /* DW 6 */
-
- unsigned int idef2upd:22; /* DW 7 */
- unsigned int reserved6:10;
-
- unsigned int ecause:20;
- unsigned int cbrstate:4;
- unsigned int cbrexecstatus:8;
-};
-
-/* CBE fields for active BCOPY instructions */
-#define cbe_baddr0 idef1upd
-#define cbe_baddr1 idef3upd
-#define cbe_src_cl idef6cpy
-#define cbe_nelemcur idef5upd
-
-enum gru_cbr_state {
- CBRSTATE_INACTIVE,
- CBRSTATE_IDLE,
- CBRSTATE_PE_CHECK,
- CBRSTATE_QUEUED,
- CBRSTATE_WAIT_RESPONSE,
- CBRSTATE_INTERRUPTED,
- CBRSTATE_INTERRUPTED_MISS_FMM,
- CBRSTATE_BUSY_INTERRUPT_MISS_FMM,
- CBRSTATE_INTERRUPTED_MISS_UPM,
- CBRSTATE_BUSY_INTERRUPTED_MISS_UPM,
- CBRSTATE_REQUEST_ISSUE,
- CBRSTATE_BUSY_INTERRUPT,
-};
-
-/* CBE cbrexecstatus bits - defined in gru_instructions.h*/
-/* CBE ecause bits - defined in gru_instructions.h */
-
-/*
- * Convert a processor pagesize into the strange encoded pagesize used by the
- * GRU. Processor pagesize is encoded as log of bytes per page. (or PAGE_SHIFT)
- * pagesize log pagesize grupagesize
- * 4k 12 0
- * 16k 14 1
- * 64k 16 2
- * 256k 18 3
- * 1m 20 4
- * 2m 21 5
- * 4m 22 6
- * 16m 24 7
- * 64m 26 8
- * ...
- */
-#define GRU_PAGESIZE(sh) ((((sh) > 20 ? (sh) + 2 : (sh)) >> 1) - 6)
-#define GRU_SIZEAVAIL(sh) (1UL << GRU_PAGESIZE(sh))
-
-/* minimum TLB purge count to ensure a full purge */
-#define GRUMAXINVAL 1024UL
-
-int cch_allocate(struct gru_context_configuration_handle *cch);
-int cch_start(struct gru_context_configuration_handle *cch);
-int cch_interrupt(struct gru_context_configuration_handle *cch);
-int cch_deallocate(struct gru_context_configuration_handle *cch);
-int cch_interrupt_sync(struct gru_context_configuration_handle *cch);
-int tgh_invalidate(struct gru_tlb_global_handle *tgh, unsigned long vaddr,
- unsigned long vaddrmask, int asid, int pagesize, int global, int n,
- unsigned short ctxbitmap);
-int tfh_write_only(struct gru_tlb_fault_handle *tfh, unsigned long paddr,
- int gaa, unsigned long vaddr, int asid, int dirty, int pagesize);
-void tfh_write_restart(struct gru_tlb_fault_handle *tfh, unsigned long paddr,
- int gaa, unsigned long vaddr, int asid, int dirty, int pagesize);
-void tfh_user_polling_mode(struct gru_tlb_fault_handle *tfh);
-void tfh_exception(struct gru_tlb_fault_handle *tfh);
-
-#endif /* __GRUHANDLES_H__ */
diff --git a/drivers/misc/sgi-gru/grukdump.c b/drivers/misc/sgi-gru/grukdump.c
deleted file mode 100644
index 9869f4f2f476..000000000000
--- a/drivers/misc/sgi-gru/grukdump.c
+++ /dev/null
@@ -1,223 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * SN Platform GRU Driver
- *
- * Dump GRU State
- *
- * Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
- */
-
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/spinlock.h>
-#include <linux/uaccess.h>
-#include <linux/delay.h>
-#include <linux/bitops.h>
-#include <asm/uv/uv_hub.h>
-
-#include <linux/nospec.h>
-
-#include "gru.h"
-#include "grutables.h"
-#include "gruhandles.h"
-#include "grulib.h"
-
-#define CCH_LOCK_ATTEMPTS 10
-
-static int gru_user_copy_handle(void __user **dp, void *s)
-{
- if (copy_to_user(*dp, s, GRU_HANDLE_BYTES))
- return -1;
- *dp += GRU_HANDLE_BYTES;
- return 0;
-}
-
-static int gru_dump_context_data(void *grubase,
- struct gru_context_configuration_handle *cch,
- void __user *ubuf, int ctxnum, int dsrcnt,
- int flush_cbrs)
-{
- void *cb, *cbe, *tfh, *gseg;
- int i, scr;
-
- gseg = grubase + ctxnum * GRU_GSEG_STRIDE;
- cb = gseg + GRU_CB_BASE;
- cbe = grubase + GRU_CBE_BASE;
- tfh = grubase + GRU_TFH_BASE;
-
- for_each_cbr_in_allocation_map(i, &cch->cbr_allocation_map, scr) {
- if (flush_cbrs)
- gru_flush_cache(cb);
- if (gru_user_copy_handle(&ubuf, cb))
- goto fail;
- if (gru_user_copy_handle(&ubuf, tfh + i * GRU_HANDLE_STRIDE))
- goto fail;
- if (gru_user_copy_handle(&ubuf, cbe + i * GRU_HANDLE_STRIDE))
- goto fail;
- cb += GRU_HANDLE_STRIDE;
- }
- if (dsrcnt)
- memcpy(ubuf, gseg + GRU_DS_BASE, dsrcnt * GRU_HANDLE_STRIDE);
- return 0;
-
-fail:
- return -EFAULT;
-}
-
-static int gru_dump_tfm(struct gru_state *gru,
- void __user *ubuf, void __user *ubufend)
-{
- struct gru_tlb_fault_map *tfm;
- int i;
-
- if (GRU_NUM_TFM * GRU_CACHE_LINE_BYTES > ubufend - ubuf)
- return -EFBIG;
-
- for (i = 0; i < GRU_NUM_TFM; i++) {
- tfm = get_tfm(gru->gs_gru_base_vaddr, i);
- if (gru_user_copy_handle(&ubuf, tfm))
- goto fail;
- }
- return GRU_NUM_TFM * GRU_CACHE_LINE_BYTES;
-
-fail:
- return -EFAULT;
-}
-
-static int gru_dump_tgh(struct gru_state *gru,
- void __user *ubuf, void __user *ubufend)
-{
- struct gru_tlb_global_handle *tgh;
- int i;
-
- if (GRU_NUM_TGH * GRU_CACHE_LINE_BYTES > ubufend - ubuf)
- return -EFBIG;
-
- for (i = 0; i < GRU_NUM_TGH; i++) {
- tgh = get_tgh(gru->gs_gru_base_vaddr, i);
- if (gru_user_copy_handle(&ubuf, tgh))
- goto fail;
- }
- return GRU_NUM_TGH * GRU_CACHE_LINE_BYTES;
-
-fail:
- return -EFAULT;
-}
-
-static int gru_dump_context(struct gru_state *gru, int ctxnum,
- void __user *ubuf, void __user *ubufend, char data_opt,
- char lock_cch, char flush_cbrs)
-{
- struct gru_dump_context_header hdr;
- struct gru_dump_context_header __user *uhdr = ubuf;
- struct gru_context_configuration_handle *cch, *ubufcch;
- struct gru_thread_state *gts;
- int try, cch_locked, cbrcnt = 0, dsrcnt = 0, bytes = 0, ret = 0;
- void *grubase;
-
- memset(&hdr, 0, sizeof(hdr));
- grubase = gru->gs_gru_base_vaddr;
- cch = get_cch(grubase, ctxnum);
- for (try = 0; try < CCH_LOCK_ATTEMPTS; try++) {
- cch_locked = trylock_cch_handle(cch);
- if (cch_locked)
- break;
- msleep(1);
- }
-
- ubuf += sizeof(hdr);
- ubufcch = ubuf;
- if (gru_user_copy_handle(&ubuf, cch)) {
- if (cch_locked)
- unlock_cch_handle(cch);
- return -EFAULT;
- }
- if (cch_locked)
- ubufcch->delresp = 0;
- bytes = sizeof(hdr) + GRU_CACHE_LINE_BYTES;
-
- if (cch_locked || !lock_cch) {
- gts = gru->gs_gts[ctxnum];
- if (gts && gts->ts_vma) {
- hdr.pid = gts->ts_tgid_owner;
- hdr.vaddr = gts->ts_vma->vm_start;
- }
- if (cch->state != CCHSTATE_INACTIVE) {
- cbrcnt = hweight64(cch->cbr_allocation_map) *
- GRU_CBR_AU_SIZE;
- dsrcnt = data_opt ? hweight32(cch->dsr_allocation_map) *
- GRU_DSR_AU_CL : 0;
- }
- bytes += (3 * cbrcnt + dsrcnt) * GRU_CACHE_LINE_BYTES;
- if (bytes > ubufend - ubuf)
- ret = -EFBIG;
- else
- ret = gru_dump_context_data(grubase, cch, ubuf, ctxnum,
- dsrcnt, flush_cbrs);
- }
- if (cch_locked)
- unlock_cch_handle(cch);
- if (ret)
- return ret;
-
- hdr.magic = GRU_DUMP_MAGIC;
- hdr.gid = gru->gs_gid;
- hdr.ctxnum = ctxnum;
- hdr.cbrcnt = cbrcnt;
- hdr.dsrcnt = dsrcnt;
- hdr.cch_locked = cch_locked;
- if (copy_to_user(uhdr, &hdr, sizeof(hdr)))
- return -EFAULT;
-
- return bytes;
-}
-
-int gru_dump_chiplet_request(unsigned long arg)
-{
- struct gru_state *gru;
- struct gru_dump_chiplet_state_req req;
- void __user *ubuf;
- void __user *ubufend;
- int ctxnum, ret, cnt = 0;
-
- if (copy_from_user(&req, (void __user *)arg, sizeof(req)))
- return -EFAULT;
-
- /* Currently, only dump by gid is implemented */
- if (req.gid >= gru_max_gids)
- return -EINVAL;
- req.gid = array_index_nospec(req.gid, gru_max_gids);
-
- gru = GID_TO_GRU(req.gid);
- ubuf = req.buf;
- ubufend = req.buf + req.buflen;
-
- ret = gru_dump_tfm(gru, ubuf, ubufend);
- if (ret < 0)
- goto fail;
- ubuf += ret;
-
- ret = gru_dump_tgh(gru, ubuf, ubufend);
- if (ret < 0)
- goto fail;
- ubuf += ret;
-
- for (ctxnum = 0; ctxnum < GRU_NUM_CCH; ctxnum++) {
- if (req.ctxnum == ctxnum || req.ctxnum < 0) {
- ret = gru_dump_context(gru, ctxnum, ubuf, ubufend,
- req.data_opt, req.lock_cch,
- req.flush_cbrs);
- if (ret < 0)
- goto fail;
- ubuf += ret;
- cnt++;
- }
- }
-
- if (copy_to_user((void __user *)arg, &req, sizeof(req)))
- return -EFAULT;
- return cnt;
-
-fail:
- return ret;
-}
diff --git a/drivers/misc/sgi-gru/grukservices.c b/drivers/misc/sgi-gru/grukservices.c
deleted file mode 100644
index 205945ce9e86..000000000000
--- a/drivers/misc/sgi-gru/grukservices.c
+++ /dev/null
@@ -1,1157 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * SN Platform GRU Driver
- *
- * KERNEL SERVICES THAT USE THE GRU
- *
- * Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
- */
-
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/slab.h>
-#include <linux/mm.h>
-#include <linux/spinlock.h>
-#include <linux/device.h>
-#include <linux/miscdevice.h>
-#include <linux/proc_fs.h>
-#include <linux/interrupt.h>
-#include <linux/sync_core.h>
-#include <linux/uaccess.h>
-#include <linux/delay.h>
-#include <linux/export.h>
-#include <asm/io_apic.h>
-#include "gru.h"
-#include "grulib.h"
-#include "grutables.h"
-#include "grukservices.h"
-#include "gru_instructions.h"
-#include <asm/uv/uv_hub.h>
-
-/*
- * Kernel GRU Usage
- *
- * The following is an interim algorithm for management of kernel GRU
- * resources. This will likely be replaced when we better understand the
- * kernel/user requirements.
- *
- * Blade percpu resources reserved for kernel use. These resources are
- * reserved whenever the kernel context for the blade is loaded. Note
- * that the kernel context is not guaranteed to be always available. It is
- * loaded on demand & can be stolen by a user if the user demand exceeds the
- * kernel demand. The kernel can always reload the kernel context but
- * a SLEEP may be required!!!.
- *
- * Async Overview:
- *
- * Each blade has one "kernel context" that owns GRU kernel resources
- * located on the blade. Kernel drivers use GRU resources in this context
- * for sending messages, zeroing memory, etc.
- *
- * The kernel context is dynamically loaded on demand. If it is not in
- * use by the kernel, the kernel context can be unloaded & given to a user.
- * The kernel context will be reloaded when needed. This may require that
- * a context be stolen from a user.
- * NOTE: frequent unloading/reloading of the kernel context is
- * expensive. We are depending on batch schedulers, cpusets, sane
- * drivers or some other mechanism to prevent the need for frequent
- * stealing/reloading.
- *
- * The kernel context consists of two parts:
- * - 1 CB & a few DSRs that are reserved for each cpu on the blade.
- * Each cpu has it's own private resources & does not share them
- * with other cpus. These resources are used serially, ie,
- * locked, used & unlocked on each call to a function in
- * grukservices.
- * (Now that we have dynamic loading of kernel contexts, I
- * may rethink this & allow sharing between cpus....)
- *
- * - Additional resources can be reserved long term & used directly
- * by UV drivers located in the kernel. Drivers using these GRU
- * resources can use asynchronous GRU instructions that send
- * interrupts on completion.
- * - these resources must be explicitly locked/unlocked
- * - locked resources prevent (obviously) the kernel
- * context from being unloaded.
- * - drivers using these resource directly issue their own
- * GRU instruction and must wait/check completion.
- *
- * When these resources are reserved, the caller can optionally
- * associate a wait_queue with the resources and use asynchronous
- * GRU instructions. When an async GRU instruction completes, the
- * driver will do a wakeup on the event.
- *
- */
-
-
-#define ASYNC_HAN_TO_BID(h) ((h) - 1)
-#define ASYNC_BID_TO_HAN(b) ((b) + 1)
-#define ASYNC_HAN_TO_BS(h) gru_base[ASYNC_HAN_TO_BID(h)]
-
-#define GRU_NUM_KERNEL_CBR 1
-#define GRU_NUM_KERNEL_DSR_BYTES 256
-#define GRU_NUM_KERNEL_DSR_CL (GRU_NUM_KERNEL_DSR_BYTES / \
- GRU_CACHE_LINE_BYTES)
-
-/* GRU instruction attributes for all instructions */
-#define IMA IMA_CB_DELAY
-
-/* GRU cacheline size is always 64 bytes - even on arches with 128 byte lines */
-#define __gru_cacheline_aligned__ \
- __attribute__((__aligned__(GRU_CACHE_LINE_BYTES)))
-
-#define MAGIC 0x1234567887654321UL
-
-/* Default retry count for GRU errors on kernel instructions */
-#define EXCEPTION_RETRY_LIMIT 3
-
-/* Status of message queue sections */
-#define MQS_EMPTY 0
-#define MQS_FULL 1
-#define MQS_NOOP 2
-
-/*----------------- RESOURCE MANAGEMENT -------------------------------------*/
-/* optimized for x86_64 */
-struct message_queue {
- union gru_mesqhead head __gru_cacheline_aligned__; /* CL 0 */
- int qlines; /* DW 1 */
- long hstatus[2];
- void *next __gru_cacheline_aligned__;/* CL 1 */
- void *limit;
- void *start;
- void *start2;
- char data ____cacheline_aligned; /* CL 2 */
-};
-
-/* First word in every message - used by mesq interface */
-struct message_header {
- char present;
- char present2;
- char lines;
- char fill;
-};
-
-#define HSTATUS(mq, h) ((mq) + offsetof(struct message_queue, hstatus[h]))
-
-/*
- * Reload the blade's kernel context into a GRU chiplet. Called holding
- * the bs_kgts_sema for READ. Will steal user contexts if necessary.
- */
-static void gru_load_kernel_context(struct gru_blade_state *bs, int blade_id)
-{
- struct gru_state *gru;
- struct gru_thread_state *kgts;
- void *vaddr;
- int ctxnum, ncpus;
-
- up_read(&bs->bs_kgts_sema);
- down_write(&bs->bs_kgts_sema);
-
- if (!bs->bs_kgts) {
- do {
- bs->bs_kgts = gru_alloc_gts(NULL, 0, 0, 0, 0, 0);
- if (!IS_ERR(bs->bs_kgts))
- break;
- msleep(1);
- } while (true);
- bs->bs_kgts->ts_user_blade_id = blade_id;
- }
- kgts = bs->bs_kgts;
-
- if (!kgts->ts_gru) {
- STAT(load_kernel_context);
- ncpus = uv_blade_nr_possible_cpus(blade_id);
- kgts->ts_cbr_au_count = GRU_CB_COUNT_TO_AU(
- GRU_NUM_KERNEL_CBR * ncpus + bs->bs_async_cbrs);
- kgts->ts_dsr_au_count = GRU_DS_BYTES_TO_AU(
- GRU_NUM_KERNEL_DSR_BYTES * ncpus +
- bs->bs_async_dsr_bytes);
- while (!gru_assign_gru_context(kgts)) {
- msleep(1);
- gru_steal_context(kgts);
- }
- gru_load_context(kgts);
- gru = bs->bs_kgts->ts_gru;
- vaddr = gru->gs_gru_base_vaddr;
- ctxnum = kgts->ts_ctxnum;
- bs->kernel_cb = get_gseg_base_address_cb(vaddr, ctxnum, 0);
- bs->kernel_dsr = get_gseg_base_address_ds(vaddr, ctxnum, 0);
- }
- downgrade_write(&bs->bs_kgts_sema);
-}
-
-/*
- * Free all kernel contexts that are not currently in use.
- * Returns 0 if all freed, else number of inuse context.
- */
-static int gru_free_kernel_contexts(void)
-{
- struct gru_blade_state *bs;
- struct gru_thread_state *kgts;
- int bid, ret = 0;
-
- for (bid = 0; bid < GRU_MAX_BLADES; bid++) {
- bs = gru_base[bid];
- if (!bs)
- continue;
-
- /* Ignore busy contexts. Don't want to block here. */
- if (down_write_trylock(&bs->bs_kgts_sema)) {
- kgts = bs->bs_kgts;
- if (kgts && kgts->ts_gru)
- gru_unload_context(kgts, 0);
- bs->bs_kgts = NULL;
- up_write(&bs->bs_kgts_sema);
- kfree(kgts);
- } else {
- ret++;
- }
- }
- return ret;
-}
-
-/*
- * Lock & load the kernel context for the specified blade.
- */
-static struct gru_blade_state *gru_lock_kernel_context(int blade_id)
-{
- struct gru_blade_state *bs;
- int bid;
-
- STAT(lock_kernel_context);
-again:
- bid = blade_id < 0 ? uv_numa_blade_id() : blade_id;
- bs = gru_base[bid];
-
- /* Handle the case where migration occurred while waiting for the sema */
- down_read(&bs->bs_kgts_sema);
- if (blade_id < 0 && bid != uv_numa_blade_id()) {
- up_read(&bs->bs_kgts_sema);
- goto again;
- }
- if (!bs->bs_kgts || !bs->bs_kgts->ts_gru)
- gru_load_kernel_context(bs, bid);
- return bs;
-
-}
-
-/*
- * Unlock the kernel context for the specified blade. Context is not
- * unloaded but may be stolen before next use.
- */
-static void gru_unlock_kernel_context(int blade_id)
-{
- struct gru_blade_state *bs;
-
- bs = gru_base[blade_id];
- up_read(&bs->bs_kgts_sema);
- STAT(unlock_kernel_context);
-}
-
-/*
- * Reserve & get pointers to the DSR/CBRs reserved for the current cpu.
- * - returns with preemption disabled
- */
-static int gru_get_cpu_resources(int dsr_bytes, void **cb, void **dsr)
-{
- struct gru_blade_state *bs;
- int lcpu;
-
- BUG_ON(dsr_bytes > GRU_NUM_KERNEL_DSR_BYTES);
- bs = gru_lock_kernel_context(-1);
- lcpu = uv_blade_processor_id();
- *cb = bs->kernel_cb + lcpu * GRU_HANDLE_STRIDE;
- *dsr = bs->kernel_dsr + lcpu * GRU_NUM_KERNEL_DSR_BYTES;
- return 0;
-}
-
-/*
- * Free the current cpus reserved DSR/CBR resources.
- */
-static void gru_free_cpu_resources(void *cb, void *dsr)
-{
- gru_unlock_kernel_context(uv_numa_blade_id());
-}
-
-/*
- * Reserve GRU resources to be used asynchronously.
- * Note: currently supports only 1 reservation per blade.
- *
- * input:
- * blade_id - blade on which resources should be reserved
- * cbrs - number of CBRs
- * dsr_bytes - number of DSR bytes needed
- * output:
- * handle to identify resource
- * (0 = async resources already reserved)
- */
-unsigned long gru_reserve_async_resources(int blade_id, int cbrs, int dsr_bytes,
- struct completion *cmp)
-{
- struct gru_blade_state *bs;
- struct gru_thread_state *kgts;
- int ret = 0;
-
- bs = gru_base[blade_id];
-
- down_write(&bs->bs_kgts_sema);
-
- /* Verify no resources already reserved */
- if (bs->bs_async_dsr_bytes + bs->bs_async_cbrs)
- goto done;
- bs->bs_async_dsr_bytes = dsr_bytes;
- bs->bs_async_cbrs = cbrs;
- bs->bs_async_wq = cmp;
- kgts = bs->bs_kgts;
-
- /* Resources changed. Unload context if already loaded */
- if (kgts && kgts->ts_gru)
- gru_unload_context(kgts, 0);
- ret = ASYNC_BID_TO_HAN(blade_id);
-
-done:
- up_write(&bs->bs_kgts_sema);
- return ret;
-}
-
-/*
- * Release async resources previously reserved.
- *
- * input:
- * han - handle to identify resources
- */
-void gru_release_async_resources(unsigned long han)
-{
- struct gru_blade_state *bs = ASYNC_HAN_TO_BS(han);
-
- down_write(&bs->bs_kgts_sema);
- bs->bs_async_dsr_bytes = 0;
- bs->bs_async_cbrs = 0;
- bs->bs_async_wq = NULL;
- up_write(&bs->bs_kgts_sema);
-}
-
-/*
- * Wait for async GRU instructions to complete.
- *
- * input:
- * han - handle to identify resources
- */
-void gru_wait_async_cbr(unsigned long han)
-{
- struct gru_blade_state *bs = ASYNC_HAN_TO_BS(han);
-
- wait_for_completion(bs->bs_async_wq);
- mb();
-}
-
-/*
- * Lock previous reserved async GRU resources
- *
- * input:
- * han - handle to identify resources
- * output:
- * cb - pointer to first CBR
- * dsr - pointer to first DSR
- */
-void gru_lock_async_resource(unsigned long han, void **cb, void **dsr)
-{
- struct gru_blade_state *bs = ASYNC_HAN_TO_BS(han);
- int blade_id = ASYNC_HAN_TO_BID(han);
- int ncpus;
-
- gru_lock_kernel_context(blade_id);
- ncpus = uv_blade_nr_possible_cpus(blade_id);
- if (cb)
- *cb = bs->kernel_cb + ncpus * GRU_HANDLE_STRIDE;
- if (dsr)
- *dsr = bs->kernel_dsr + ncpus * GRU_NUM_KERNEL_DSR_BYTES;
-}
-
-/*
- * Unlock previous reserved async GRU resources
- *
- * input:
- * han - handle to identify resources
- */
-void gru_unlock_async_resource(unsigned long han)
-{
- int blade_id = ASYNC_HAN_TO_BID(han);
-
- gru_unlock_kernel_context(blade_id);
-}
-
-/*----------------------------------------------------------------------*/
-int gru_get_cb_exception_detail(void *cb,
- struct control_block_extended_exc_detail *excdet)
-{
- struct gru_control_block_extended *cbe;
- struct gru_thread_state *kgts = NULL;
- unsigned long off;
- int cbrnum, bid;
-
- /*
- * Locate kgts for cb. This algorithm is SLOW but
- * this function is rarely called (ie., almost never).
- * Performance does not matter.
- */
- for_each_possible_blade(bid) {
- if (!gru_base[bid])
- break;
- kgts = gru_base[bid]->bs_kgts;
- if (!kgts || !kgts->ts_gru)
- continue;
- off = cb - kgts->ts_gru->gs_gru_base_vaddr;
- if (off < GRU_SIZE)
- break;
- kgts = NULL;
- }
- BUG_ON(!kgts);
- cbrnum = thread_cbr_number(kgts, get_cb_number(cb));
- cbe = get_cbe(GRUBASE(cb), cbrnum);
- gru_flush_cache(cbe); /* CBE not coherent */
- sync_core();
- excdet->opc = cbe->opccpy;
- excdet->exopc = cbe->exopccpy;
- excdet->ecause = cbe->ecause;
- excdet->exceptdet0 = cbe->idef1upd;
- excdet->exceptdet1 = cbe->idef3upd;
- gru_flush_cache(cbe);
- return 0;
-}
-
-static char *gru_get_cb_exception_detail_str(int ret, void *cb,
- char *buf, int size)
-{
- struct gru_control_block_status *gen = cb;
- struct control_block_extended_exc_detail excdet;
-
- if (ret > 0 && gen->istatus == CBS_EXCEPTION) {
- gru_get_cb_exception_detail(cb, &excdet);
- snprintf(buf, size,
- "GRU:%d exception: cb %p, opc %d, exopc %d, ecause 0x%x,"
- "excdet0 0x%lx, excdet1 0x%x", smp_processor_id(),
- gen, excdet.opc, excdet.exopc, excdet.ecause,
- excdet.exceptdet0, excdet.exceptdet1);
- } else {
- snprintf(buf, size, "No exception");
- }
- return buf;
-}
-
-static int gru_wait_idle_or_exception(struct gru_control_block_status *gen)
-{
- while (gen->istatus >= CBS_ACTIVE) {
- cpu_relax();
- barrier();
- }
- return gen->istatus;
-}
-
-static int gru_retry_exception(void *cb)
-{
- struct gru_control_block_status *gen = cb;
- struct control_block_extended_exc_detail excdet;
- int retry = EXCEPTION_RETRY_LIMIT;
-
- while (1) {
- if (gru_wait_idle_or_exception(gen) == CBS_IDLE)
- return CBS_IDLE;
- if (gru_get_cb_message_queue_substatus(cb))
- return CBS_EXCEPTION;
- gru_get_cb_exception_detail(cb, &excdet);
- if ((excdet.ecause & ~EXCEPTION_RETRY_BITS) ||
- (excdet.cbrexecstatus & CBR_EXS_ABORT_OCC))
- break;
- if (retry-- == 0)
- break;
- gen->icmd = 1;
- gru_flush_cache(gen);
- }
- return CBS_EXCEPTION;
-}
-
-int gru_check_status_proc(void *cb)
-{
- struct gru_control_block_status *gen = cb;
- int ret;
-
- ret = gen->istatus;
- if (ret == CBS_EXCEPTION)
- ret = gru_retry_exception(cb);
- rmb();
- return ret;
-
-}
-
-int gru_wait_proc(void *cb)
-{
- struct gru_control_block_status *gen = cb;
- int ret;
-
- ret = gru_wait_idle_or_exception(gen);
- if (ret == CBS_EXCEPTION)
- ret = gru_retry_exception(cb);
- rmb();
- return ret;
-}
-
-static void gru_abort(int ret, void *cb, char *str)
-{
- char buf[GRU_EXC_STR_SIZE];
-
- panic("GRU FATAL ERROR: %s - %s\n", str,
- gru_get_cb_exception_detail_str(ret, cb, buf, sizeof(buf)));
-}
-
-void gru_wait_abort_proc(void *cb)
-{
- int ret;
-
- ret = gru_wait_proc(cb);
- if (ret)
- gru_abort(ret, cb, "gru_wait_abort");
-}
-
-
-/*------------------------------ MESSAGE QUEUES -----------------------------*/
-
-/* Internal status . These are NOT returned to the user. */
-#define MQIE_AGAIN -1 /* try again */
-
-
-/*
- * Save/restore the "present" flag that is in the second line of 2-line
- * messages
- */
-static inline int get_present2(void *p)
-{
- struct message_header *mhdr = p + GRU_CACHE_LINE_BYTES;
- return mhdr->present;
-}
-
-static inline void restore_present2(void *p, int val)
-{
- struct message_header *mhdr = p + GRU_CACHE_LINE_BYTES;
- mhdr->present = val;
-}
-
-/*
- * Create a message queue.
- * qlines - message queue size in cache lines. Includes 2-line header.
- */
-int gru_create_message_queue(struct gru_message_queue_desc *mqd,
- void *p, unsigned int bytes, int nasid, int vector, int apicid)
-{
- struct message_queue *mq = p;
- unsigned int qlines;
-
- qlines = bytes / GRU_CACHE_LINE_BYTES - 2;
- memset(mq, 0, bytes);
- mq->start = &mq->data;
- mq->start2 = &mq->data + (qlines / 2 - 1) * GRU_CACHE_LINE_BYTES;
- mq->next = &mq->data;
- mq->limit = &mq->data + (qlines - 2) * GRU_CACHE_LINE_BYTES;
- mq->qlines = qlines;
- mq->hstatus[0] = 0;
- mq->hstatus[1] = 1;
- mq->head = gru_mesq_head(2, qlines / 2 + 1);
- mqd->mq = mq;
- mqd->mq_gpa = uv_gpa(mq);
- mqd->qlines = qlines;
- mqd->interrupt_pnode = nasid >> 1;
- mqd->interrupt_vector = vector;
- mqd->interrupt_apicid = apicid;
- return 0;
-}
-EXPORT_SYMBOL_GPL(gru_create_message_queue);
-
-/*
- * Send a NOOP message to a message queue
- * Returns:
- * 0 - if queue is full after the send. This is the normal case
- * but various races can change this.
- * -1 - if mesq sent successfully but queue not full
- * >0 - unexpected error. MQE_xxx returned
- */
-static int send_noop_message(void *cb, struct gru_message_queue_desc *mqd,
- void *mesg)
-{
- const struct message_header noop_header = {
- .present = MQS_NOOP, .lines = 1};
- unsigned long m;
- int substatus, ret;
- struct message_header save_mhdr, *mhdr = mesg;
-
- STAT(mesq_noop);
- save_mhdr = *mhdr;
- *mhdr = noop_header;
- gru_mesq(cb, mqd->mq_gpa, gru_get_tri(mhdr), 1, IMA);
- ret = gru_wait(cb);
-
- if (ret) {
- substatus = gru_get_cb_message_queue_substatus(cb);
- switch (substatus) {
- case CBSS_NO_ERROR:
- STAT(mesq_noop_unexpected_error);
- ret = MQE_UNEXPECTED_CB_ERR;
- break;
- case CBSS_LB_OVERFLOWED:
- STAT(mesq_noop_lb_overflow);
- ret = MQE_CONGESTION;
- break;
- case CBSS_QLIMIT_REACHED:
- STAT(mesq_noop_qlimit_reached);
- ret = 0;
- break;
- case CBSS_AMO_NACKED:
- STAT(mesq_noop_amo_nacked);
- ret = MQE_CONGESTION;
- break;
- case CBSS_PUT_NACKED:
- STAT(mesq_noop_put_nacked);
- m = mqd->mq_gpa + (gru_get_amo_value_head(cb) << 6);
- gru_vstore(cb, m, gru_get_tri(mesg), XTYPE_CL, 1, 1,
- IMA);
- if (gru_wait(cb) == CBS_IDLE)
- ret = MQIE_AGAIN;
- else
- ret = MQE_UNEXPECTED_CB_ERR;
- break;
- case CBSS_PAGE_OVERFLOW:
- STAT(mesq_noop_page_overflow);
- fallthrough;
- default:
- BUG();
- }
- }
- *mhdr = save_mhdr;
- return ret;
-}
-
-/*
- * Handle a gru_mesq full.
- */
-static int send_message_queue_full(void *cb, struct gru_message_queue_desc *mqd,
- void *mesg, int lines)
-{
- union gru_mesqhead mqh;
- unsigned int limit, head;
- unsigned long avalue;
- int half, qlines;
-
- /* Determine if switching to first/second half of q */
- avalue = gru_get_amo_value(cb);
- head = gru_get_amo_value_head(cb);
- limit = gru_get_amo_value_limit(cb);
-
- qlines = mqd->qlines;
- half = (limit != qlines);
-
- if (half)
- mqh = gru_mesq_head(qlines / 2 + 1, qlines);
- else
- mqh = gru_mesq_head(2, qlines / 2 + 1);
-
- /* Try to get lock for switching head pointer */
- gru_gamir(cb, EOP_IR_CLR, HSTATUS(mqd->mq_gpa, half), XTYPE_DW, IMA);
- if (gru_wait(cb) != CBS_IDLE)
- goto cberr;
- if (!gru_get_amo_value(cb)) {
- STAT(mesq_qf_locked);
- return MQE_QUEUE_FULL;
- }
-
- /* Got the lock. Send optional NOP if queue not full, */
- if (head != limit) {
- if (send_noop_message(cb, mqd, mesg)) {
- gru_gamir(cb, EOP_IR_INC, HSTATUS(mqd->mq_gpa, half),
- XTYPE_DW, IMA);
- if (gru_wait(cb) != CBS_IDLE)
- goto cberr;
- STAT(mesq_qf_noop_not_full);
- return MQIE_AGAIN;
- }
- avalue++;
- }
-
- /* Then flip queuehead to other half of queue. */
- gru_gamer(cb, EOP_ERR_CSWAP, mqd->mq_gpa, XTYPE_DW, mqh.val, avalue,
- IMA);
- if (gru_wait(cb) != CBS_IDLE)
- goto cberr;
-
- /* If not successfully in swapping queue head, clear the hstatus lock */
- if (gru_get_amo_value(cb) != avalue) {
- STAT(mesq_qf_switch_head_failed);
- gru_gamir(cb, EOP_IR_INC, HSTATUS(mqd->mq_gpa, half), XTYPE_DW,
- IMA);
- if (gru_wait(cb) != CBS_IDLE)
- goto cberr;
- }
- return MQIE_AGAIN;
-cberr:
- STAT(mesq_qf_unexpected_error);
- return MQE_UNEXPECTED_CB_ERR;
-}
-
-/*
- * Handle a PUT failure. Note: if message was a 2-line message, one of the
- * lines might have successfully have been written. Before sending the
- * message, "present" must be cleared in BOTH lines to prevent the receiver
- * from prematurely seeing the full message.
- */
-static int send_message_put_nacked(void *cb, struct gru_message_queue_desc *mqd,
- void *mesg, int lines)
-{
- unsigned long m;
- int ret, loops = 200; /* experimentally determined */
-
- m = mqd->mq_gpa + (gru_get_amo_value_head(cb) << 6);
- if (lines == 2) {
- gru_vset(cb, m, 0, XTYPE_CL, lines, 1, IMA);
- if (gru_wait(cb) != CBS_IDLE)
- return MQE_UNEXPECTED_CB_ERR;
- }
- gru_vstore(cb, m, gru_get_tri(mesg), XTYPE_CL, lines, 1, IMA);
- if (gru_wait(cb) != CBS_IDLE)
- return MQE_UNEXPECTED_CB_ERR;
-
- if (!mqd->interrupt_vector)
- return MQE_OK;
-
- /*
- * Send a noop message in order to deliver a cross-partition interrupt
- * to the SSI that contains the target message queue. Normally, the
- * interrupt is automatically delivered by hardware following mesq
- * operations, but some error conditions require explicit delivery.
- * The noop message will trigger delivery. Otherwise partition failures
- * could cause unrecovered errors.
- */
- do {
- ret = send_noop_message(cb, mqd, mesg);
- } while ((ret == MQIE_AGAIN || ret == MQE_CONGESTION) && (loops-- > 0));
-
- if (ret == MQIE_AGAIN || ret == MQE_CONGESTION) {
- /*
- * Don't indicate to the app to resend the message, as it's
- * already been successfully sent. We simply send an OK
- * (rather than fail the send with MQE_UNEXPECTED_CB_ERR),
- * assuming that the other side is receiving enough
- * interrupts to get this message processed anyway.
- */
- ret = MQE_OK;
- }
- return ret;
-}
-
-/*
- * Handle a gru_mesq failure. Some of these failures are software recoverable
- * or retryable.
- */
-static int send_message_failure(void *cb, struct gru_message_queue_desc *mqd,
- void *mesg, int lines)
-{
- int substatus, ret = 0;
-
- substatus = gru_get_cb_message_queue_substatus(cb);
- switch (substatus) {
- case CBSS_NO_ERROR:
- STAT(mesq_send_unexpected_error);
- ret = MQE_UNEXPECTED_CB_ERR;
- break;
- case CBSS_LB_OVERFLOWED:
- STAT(mesq_send_lb_overflow);
- ret = MQE_CONGESTION;
- break;
- case CBSS_QLIMIT_REACHED:
- STAT(mesq_send_qlimit_reached);
- ret = send_message_queue_full(cb, mqd, mesg, lines);
- break;
- case CBSS_AMO_NACKED:
- STAT(mesq_send_amo_nacked);
- ret = MQE_CONGESTION;
- break;
- case CBSS_PUT_NACKED:
- STAT(mesq_send_put_nacked);
- ret = send_message_put_nacked(cb, mqd, mesg, lines);
- break;
- case CBSS_PAGE_OVERFLOW:
- STAT(mesq_page_overflow);
- fallthrough;
- default:
- BUG();
- }
- return ret;
-}
-
-/*
- * Send a message to a message queue
- * mqd message queue descriptor
- * mesg message. ust be vaddr within a GSEG
- * bytes message size (<= 2 CL)
- */
-int gru_send_message_gpa(struct gru_message_queue_desc *mqd, void *mesg,
- unsigned int bytes)
-{
- struct message_header *mhdr;
- void *cb;
- void *dsr;
- int istatus, clines, ret;
-
- STAT(mesq_send);
- BUG_ON(bytes < sizeof(int) || bytes > 2 * GRU_CACHE_LINE_BYTES);
-
- clines = DIV_ROUND_UP(bytes, GRU_CACHE_LINE_BYTES);
- if (gru_get_cpu_resources(bytes, &cb, &dsr))
- return MQE_BUG_NO_RESOURCES;
- memcpy(dsr, mesg, bytes);
- mhdr = dsr;
- mhdr->present = MQS_FULL;
- mhdr->lines = clines;
- if (clines == 2) {
- mhdr->present2 = get_present2(mhdr);
- restore_present2(mhdr, MQS_FULL);
- }
-
- do {
- ret = MQE_OK;
- gru_mesq(cb, mqd->mq_gpa, gru_get_tri(mhdr), clines, IMA);
- istatus = gru_wait(cb);
- if (istatus != CBS_IDLE)
- ret = send_message_failure(cb, mqd, dsr, clines);
- } while (ret == MQIE_AGAIN);
- gru_free_cpu_resources(cb, dsr);
-
- if (ret)
- STAT(mesq_send_failed);
- return ret;
-}
-EXPORT_SYMBOL_GPL(gru_send_message_gpa);
-
-/*
- * Advance the receive pointer for the queue to the next message.
- */
-void gru_free_message(struct gru_message_queue_desc *mqd, void *mesg)
-{
- struct message_queue *mq = mqd->mq;
- struct message_header *mhdr = mq->next;
- void *next, *pnext;
- int half = -1;
- int lines = mhdr->lines;
-
- if (lines == 2)
- restore_present2(mhdr, MQS_EMPTY);
- mhdr->present = MQS_EMPTY;
-
- pnext = mq->next;
- next = pnext + GRU_CACHE_LINE_BYTES * lines;
- if (next == mq->limit) {
- next = mq->start;
- half = 1;
- } else if (pnext < mq->start2 && next >= mq->start2) {
- half = 0;
- }
-
- if (half >= 0)
- mq->hstatus[half] = 1;
- mq->next = next;
-}
-EXPORT_SYMBOL_GPL(gru_free_message);
-
-/*
- * Get next message from message queue. Return NULL if no message
- * present. User must call next_message() to move to next message.
- * rmq message queue
- */
-void *gru_get_next_message(struct gru_message_queue_desc *mqd)
-{
- struct message_queue *mq = mqd->mq;
- struct message_header *mhdr = mq->next;
- int present = mhdr->present;
-
- /* skip NOOP messages */
- while (present == MQS_NOOP) {
- gru_free_message(mqd, mhdr);
- mhdr = mq->next;
- present = mhdr->present;
- }
-
- /* Wait for both halves of 2 line messages */
- if (present == MQS_FULL && mhdr->lines == 2 &&
- get_present2(mhdr) == MQS_EMPTY)
- present = MQS_EMPTY;
-
- if (!present) {
- STAT(mesq_receive_none);
- return NULL;
- }
-
- if (mhdr->lines == 2)
- restore_present2(mhdr, mhdr->present2);
-
- STAT(mesq_receive);
- return mhdr;
-}
-EXPORT_SYMBOL_GPL(gru_get_next_message);
-
-/* ---------------------- GRU DATA COPY FUNCTIONS ---------------------------*/
-
-/*
- * Load a DW from a global GPA. The GPA can be a memory or MMR address.
- */
-int gru_read_gpa(unsigned long *value, unsigned long gpa)
-{
- void *cb;
- void *dsr;
- int ret, iaa;
-
- STAT(read_gpa);
- if (gru_get_cpu_resources(GRU_NUM_KERNEL_DSR_BYTES, &cb, &dsr))
- return MQE_BUG_NO_RESOURCES;
- iaa = gpa >> 62;
- gru_vload_phys(cb, gpa, gru_get_tri(dsr), iaa, IMA);
- ret = gru_wait(cb);
- if (ret == CBS_IDLE)
- *value = *(unsigned long *)dsr;
- gru_free_cpu_resources(cb, dsr);
- return ret;
-}
-EXPORT_SYMBOL_GPL(gru_read_gpa);
-
-
-/*
- * Copy a block of data using the GRU resources
- */
-int gru_copy_gpa(unsigned long dest_gpa, unsigned long src_gpa,
- unsigned int bytes)
-{
- void *cb;
- void *dsr;
- int ret;
-
- STAT(copy_gpa);
- if (gru_get_cpu_resources(GRU_NUM_KERNEL_DSR_BYTES, &cb, &dsr))
- return MQE_BUG_NO_RESOURCES;
- gru_bcopy(cb, src_gpa, dest_gpa, gru_get_tri(dsr),
- XTYPE_B, bytes, GRU_NUM_KERNEL_DSR_CL, IMA);
- ret = gru_wait(cb);
- gru_free_cpu_resources(cb, dsr);
- return ret;
-}
-EXPORT_SYMBOL_GPL(gru_copy_gpa);
-
-/* ------------------- KERNEL QUICKTESTS RUN AT STARTUP ----------------*/
-/* Temp - will delete after we gain confidence in the GRU */
-
-static int quicktest0(unsigned long arg)
-{
- unsigned long word0;
- unsigned long word1;
- void *cb;
- void *dsr;
- unsigned long *p;
- int ret = -EIO;
-
- if (gru_get_cpu_resources(GRU_CACHE_LINE_BYTES, &cb, &dsr))
- return MQE_BUG_NO_RESOURCES;
- p = dsr;
- word0 = MAGIC;
- word1 = 0;
-
- gru_vload(cb, uv_gpa(&word0), gru_get_tri(dsr), XTYPE_DW, 1, 1, IMA);
- if (gru_wait(cb) != CBS_IDLE) {
- printk(KERN_DEBUG "GRU:%d quicktest0: CBR failure 1\n", smp_processor_id());
- goto done;
- }
-
- if (*p != MAGIC) {
- printk(KERN_DEBUG "GRU:%d quicktest0 bad magic 0x%lx\n", smp_processor_id(), *p);
- goto done;
- }
- gru_vstore(cb, uv_gpa(&word1), gru_get_tri(dsr), XTYPE_DW, 1, 1, IMA);
- if (gru_wait(cb) != CBS_IDLE) {
- printk(KERN_DEBUG "GRU:%d quicktest0: CBR failure 2\n", smp_processor_id());
- goto done;
- }
-
- if (word0 != word1 || word1 != MAGIC) {
- printk(KERN_DEBUG
- "GRU:%d quicktest0 err: found 0x%lx, expected 0x%lx\n",
- smp_processor_id(), word1, MAGIC);
- goto done;
- }
- ret = 0;
-
-done:
- gru_free_cpu_resources(cb, dsr);
- return ret;
-}
-
-#define ALIGNUP(p, q) ((void *)(((unsigned long)(p) + (q) - 1) & ~(q - 1)))
-
-static int quicktest1(unsigned long arg)
-{
- struct gru_message_queue_desc mqd;
- void *p, *mq;
- int i, ret = -EIO;
- char mes[GRU_CACHE_LINE_BYTES], *m;
-
- /* Need 1K cacheline aligned that does not cross page boundary */
- p = kmalloc(4096, 0);
- if (p == NULL)
- return -ENOMEM;
- mq = ALIGNUP(p, 1024);
- memset(mes, 0xee, sizeof(mes));
-
- gru_create_message_queue(&mqd, mq, 8 * GRU_CACHE_LINE_BYTES, 0, 0, 0);
- for (i = 0; i < 6; i++) {
- mes[8] = i;
- do {
- ret = gru_send_message_gpa(&mqd, mes, sizeof(mes));
- } while (ret == MQE_CONGESTION);
- if (ret)
- break;
- }
- if (ret != MQE_QUEUE_FULL || i != 4) {
- printk(KERN_DEBUG "GRU:%d quicktest1: unexpected status %d, i %d\n",
- smp_processor_id(), ret, i);
- goto done;
- }
-
- for (i = 0; i < 6; i++) {
- m = gru_get_next_message(&mqd);
- if (!m || m[8] != i)
- break;
- gru_free_message(&mqd, m);
- }
- if (i != 4) {
- printk(KERN_DEBUG "GRU:%d quicktest2: bad message, i %d, m %p, m8 %d\n",
- smp_processor_id(), i, m, m ? m[8] : -1);
- goto done;
- }
- ret = 0;
-
-done:
- kfree(p);
- return ret;
-}
-
-static int quicktest2(unsigned long arg)
-{
- static DECLARE_COMPLETION(cmp);
- unsigned long han;
- int blade_id = 0;
- int numcb = 4;
- int ret = 0;
- unsigned long *buf;
- void *cb0, *cb;
- struct gru_control_block_status *gen;
- int i, k, istatus, bytes;
-
- bytes = numcb * 4 * 8;
- buf = kmalloc(bytes, GFP_KERNEL);
- if (!buf)
- return -ENOMEM;
-
- ret = -EBUSY;
- han = gru_reserve_async_resources(blade_id, numcb, 0, &cmp);
- if (!han)
- goto done;
-
- gru_lock_async_resource(han, &cb0, NULL);
- memset(buf, 0xee, bytes);
- for (i = 0; i < numcb; i++)
- gru_vset(cb0 + i * GRU_HANDLE_STRIDE, uv_gpa(&buf[i * 4]), 0,
- XTYPE_DW, 4, 1, IMA_INTERRUPT);
-
- ret = 0;
- k = numcb;
- do {
- gru_wait_async_cbr(han);
- for (i = 0; i < numcb; i++) {
- cb = cb0 + i * GRU_HANDLE_STRIDE;
- istatus = gru_check_status(cb);
- if (istatus != CBS_ACTIVE && istatus != CBS_CALL_OS)
- break;
- }
- if (i == numcb)
- continue;
- if (istatus != CBS_IDLE) {
- printk(KERN_DEBUG "GRU:%d quicktest2: cb %d, exception\n", smp_processor_id(), i);
- ret = -EFAULT;
- } else if (buf[4 * i] || buf[4 * i + 1] || buf[4 * i + 2] ||
- buf[4 * i + 3]) {
- printk(KERN_DEBUG "GRU:%d quicktest2:cb %d, buf 0x%lx, 0x%lx, 0x%lx, 0x%lx\n",
- smp_processor_id(), i, buf[4 * i], buf[4 * i + 1], buf[4 * i + 2], buf[4 * i + 3]);
- ret = -EIO;
- }
- k--;
- gen = cb;
- gen->istatus = CBS_CALL_OS; /* don't handle this CBR again */
- } while (k);
- BUG_ON(cmp.done);
-
- gru_unlock_async_resource(han);
- gru_release_async_resources(han);
-done:
- kfree(buf);
- return ret;
-}
-
-#define BUFSIZE 200
-static int quicktest3(unsigned long arg)
-{
- char buf1[BUFSIZE], buf2[BUFSIZE];
- int ret = 0;
-
- memset(buf2, 0, sizeof(buf2));
- memset(buf1, get_cycles() & 255, sizeof(buf1));
- gru_copy_gpa(uv_gpa(buf2), uv_gpa(buf1), BUFSIZE);
- if (memcmp(buf1, buf2, BUFSIZE)) {
- printk(KERN_DEBUG "GRU:%d quicktest3 error\n", smp_processor_id());
- ret = -EIO;
- }
- return ret;
-}
-
-/*
- * Debugging only. User hook for various kernel tests
- * of driver & gru.
- */
-int gru_ktest(unsigned long arg)
-{
- int ret = -EINVAL;
-
- switch (arg & 0xff) {
- case 0:
- ret = quicktest0(arg);
- break;
- case 1:
- ret = quicktest1(arg);
- break;
- case 2:
- ret = quicktest2(arg);
- break;
- case 3:
- ret = quicktest3(arg);
- break;
- case 99:
- ret = gru_free_kernel_contexts();
- break;
- }
- return ret;
-
-}
-
-int gru_kservices_init(void)
-{
- return 0;
-}
-
-void gru_kservices_exit(void)
-{
- if (gru_free_kernel_contexts())
- BUG();
-}
-
diff --git a/drivers/misc/sgi-gru/grukservices.h b/drivers/misc/sgi-gru/grukservices.h
deleted file mode 100644
index 510e45e9737e..000000000000
--- a/drivers/misc/sgi-gru/grukservices.h
+++ /dev/null
@@ -1,201 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-
-/*
- * Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
- */
-#ifndef __GRU_KSERVICES_H_
-#define __GRU_KSERVICES_H_
-
-
-/*
- * Message queues using the GRU to send/receive messages.
- *
- * These function allow the user to create a message queue for
- * sending/receiving 1 or 2 cacheline messages using the GRU.
- *
- * Processes SENDING messages will use a kernel CBR/DSR to send
- * the message. This is transparent to the caller.
- *
- * The receiver does not use any GRU resources.
- *
- * The functions support:
- * - single receiver
- * - multiple senders
- * - cross partition message
- *
- * Missing features ZZZ:
- * - user options for dealing with timeouts, queue full, etc.
- * - gru_create_message_queue() needs interrupt vector info
- */
-
-struct gru_message_queue_desc {
- void *mq; /* message queue vaddress */
- unsigned long mq_gpa; /* global address of mq */
- int qlines; /* queue size in CL */
- int interrupt_vector; /* interrupt vector */
- int interrupt_pnode; /* pnode for interrupt */
- int interrupt_apicid; /* lapicid for interrupt */
-};
-
-/*
- * Initialize a user allocated chunk of memory to be used as
- * a message queue. The caller must ensure that the queue is
- * in contiguous physical memory and is cacheline aligned.
- *
- * Message queue size is the total number of bytes allocated
- * to the queue including a 2 cacheline header that is used
- * to manage the queue.
- *
- * Input:
- * mqd pointer to message queue descriptor
- * p pointer to user allocated mesq memory.
- * bytes size of message queue in bytes
- * vector interrupt vector (zero if no interrupts)
- * nasid nasid of blade where interrupt is delivered
- * apicid apicid of cpu for interrupt
- *
- * Errors:
- * 0 OK
- * >0 error
- */
-extern int gru_create_message_queue(struct gru_message_queue_desc *mqd,
- void *p, unsigned int bytes, int nasid, int vector, int apicid);
-
-/*
- * Send a message to a message queue.
- *
- * Note: The message queue transport mechanism uses the first 32
- * bits of the message. Users should avoid using these bits.
- *
- *
- * Input:
- * mqd pointer to message queue descriptor
- * mesg pointer to message. Must be 64-bit aligned
- * bytes size of message in bytes
- *
- * Output:
- * 0 message sent
- * >0 Send failure - see error codes below
- *
- */
-extern int gru_send_message_gpa(struct gru_message_queue_desc *mqd,
- void *mesg, unsigned int bytes);
-
-/* Status values for gru_send_message() */
-#define MQE_OK 0 /* message sent successfully */
-#define MQE_CONGESTION 1 /* temporary congestion, try again */
-#define MQE_QUEUE_FULL 2 /* queue is full */
-#define MQE_UNEXPECTED_CB_ERR 3 /* unexpected CB error */
-#define MQE_PAGE_OVERFLOW 10 /* BUG - queue overflowed a page */
-#define MQE_BUG_NO_RESOURCES 11 /* BUG - could not alloc GRU cb/dsr */
-
-/*
- * Advance the receive pointer for the message queue to the next message.
- * Note: current API requires messages to be gotten & freed in order. Future
- * API extensions may allow for out-of-order freeing.
- *
- * Input
- * mqd pointer to message queue descriptor
- * mesq message being freed
- */
-extern void gru_free_message(struct gru_message_queue_desc *mqd,
- void *mesq);
-
-/*
- * Get next message from message queue. Returns pointer to
- * message OR NULL if no message present.
- * User must call gru_free_message() after message is processed
- * in order to move the queue pointers to next message.
- *
- * Input
- * mqd pointer to message queue descriptor
- *
- * Output:
- * p pointer to message
- * NULL no message available
- */
-extern void *gru_get_next_message(struct gru_message_queue_desc *mqd);
-
-
-/*
- * Read a GRU global GPA. Source can be located in a remote partition.
- *
- * Input:
- * value memory address where MMR value is returned
- * gpa source numalink physical address of GPA
- *
- * Output:
- * 0 OK
- * >0 error
- */
-int gru_read_gpa(unsigned long *value, unsigned long gpa);
-
-
-/*
- * Copy data using the GRU. Source or destination can be located in a remote
- * partition.
- *
- * Input:
- * dest_gpa destination global physical address
- * src_gpa source global physical address
- * bytes number of bytes to copy
- *
- * Output:
- * 0 OK
- * >0 error
- */
-extern int gru_copy_gpa(unsigned long dest_gpa, unsigned long src_gpa,
- unsigned int bytes);
-
-/*
- * Reserve GRU resources to be used asynchronously.
- *
- * input:
- * blade_id - blade on which resources should be reserved
- * cbrs - number of CBRs
- * dsr_bytes - number of DSR bytes needed
- * cmp - completion structure for waiting for
- * async completions
- * output:
- * handle to identify resource
- * (0 = no resources)
- */
-extern unsigned long gru_reserve_async_resources(int blade_id, int cbrs, int dsr_bytes,
- struct completion *cmp);
-
-/*
- * Release async resources previously reserved.
- *
- * input:
- * han - handle to identify resources
- */
-extern void gru_release_async_resources(unsigned long han);
-
-/*
- * Wait for async GRU instructions to complete.
- *
- * input:
- * han - handle to identify resources
- */
-extern void gru_wait_async_cbr(unsigned long han);
-
-/*
- * Lock previous reserved async GRU resources
- *
- * input:
- * han - handle to identify resources
- * output:
- * cb - pointer to first CBR
- * dsr - pointer to first DSR
- */
-extern void gru_lock_async_resource(unsigned long han, void **cb, void **dsr);
-
-/*
- * Unlock previous reserved async GRU resources
- *
- * input:
- * han - handle to identify resources
- */
-extern void gru_unlock_async_resource(unsigned long han);
-
-#endif /* __GRU_KSERVICES_H_ */
diff --git a/drivers/misc/sgi-gru/grulib.h b/drivers/misc/sgi-gru/grulib.h
deleted file mode 100644
index 85c103923632..000000000000
--- a/drivers/misc/sgi-gru/grulib.h
+++ /dev/null
@@ -1,153 +0,0 @@
-/*
- * Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published by
- * the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-#ifndef __GRULIB_H__
-#define __GRULIB_H__
-
-#define GRU_BASENAME "gru"
-#define GRU_FULLNAME "/dev/gru"
-#define GRU_IOCTL_NUM 'G'
-
-/*
- * Maximum number of GRU segments that a user can have open
- * ZZZ temp - set high for testing. Revisit.
- */
-#define GRU_MAX_OPEN_CONTEXTS 32
-
-/* Set Number of Request Blocks */
-#define GRU_CREATE_CONTEXT _IOWR(GRU_IOCTL_NUM, 1, void *)
-
-/* Set Context Options */
-#define GRU_SET_CONTEXT_OPTION _IOWR(GRU_IOCTL_NUM, 4, void *)
-
-/* Fetch exception detail */
-#define GRU_USER_GET_EXCEPTION_DETAIL _IOWR(GRU_IOCTL_NUM, 6, void *)
-
-/* For user call_os handling - normally a TLB fault */
-#define GRU_USER_CALL_OS _IOWR(GRU_IOCTL_NUM, 8, void *)
-
-/* For user unload context */
-#define GRU_USER_UNLOAD_CONTEXT _IOWR(GRU_IOCTL_NUM, 9, void *)
-
-/* For dumpping GRU chiplet state */
-#define GRU_DUMP_CHIPLET_STATE _IOWR(GRU_IOCTL_NUM, 11, void *)
-
-/* For getting gseg statistics */
-#define GRU_GET_GSEG_STATISTICS _IOWR(GRU_IOCTL_NUM, 12, void *)
-
-/* For user TLB flushing (primarily for tests) */
-#define GRU_USER_FLUSH_TLB _IOWR(GRU_IOCTL_NUM, 50, void *)
-
-/* Get some config options (primarily for tests & emulator) */
-#define GRU_GET_CONFIG_INFO _IOWR(GRU_IOCTL_NUM, 51, void *)
-
-/* Various kernel self-tests */
-#define GRU_KTEST _IOWR(GRU_IOCTL_NUM, 52, void *)
-
-#define CONTEXT_WINDOW_BYTES(th) (GRU_GSEG_PAGESIZE * (th))
-#define THREAD_POINTER(p, th) (p + GRU_GSEG_PAGESIZE * (th))
-#define GSEG_START(cb) ((void *)((unsigned long)(cb) & ~(GRU_GSEG_PAGESIZE - 1)))
-
-struct gru_get_gseg_statistics_req {
- unsigned long gseg;
- struct gru_gseg_statistics stats;
-};
-
-/*
- * Structure used to pass TLB flush parameters to the driver
- */
-struct gru_create_context_req {
- unsigned long gseg;
- unsigned int data_segment_bytes;
- unsigned int control_blocks;
- unsigned int maximum_thread_count;
- unsigned int options;
- unsigned char tlb_preload_count;
-};
-
-/*
- * Structure used to pass unload context parameters to the driver
- */
-struct gru_unload_context_req {
- unsigned long gseg;
-};
-
-/*
- * Structure used to set context options
- */
-enum {sco_gseg_owner, sco_cch_req_slice, sco_blade_chiplet};
-struct gru_set_context_option_req {
- unsigned long gseg;
- int op;
- int val0;
- long val1;
-};
-
-/*
- * Structure used to pass TLB flush parameters to the driver
- */
-struct gru_flush_tlb_req {
- unsigned long gseg;
- unsigned long vaddr;
- size_t len;
-};
-
-/*
- * Structure used to pass TLB flush parameters to the driver
- */
-enum {dcs_pid, dcs_gid};
-struct gru_dump_chiplet_state_req {
- unsigned int op;
- unsigned int gid;
- int ctxnum;
- char data_opt;
- char lock_cch;
- char flush_cbrs;
- char fill[10];
- pid_t pid;
- void *buf;
- size_t buflen;
- /* ---- output --- */
- unsigned int num_contexts;
-};
-
-#define GRU_DUMP_MAGIC 0x3474ab6c
-struct gru_dump_context_header {
- unsigned int magic;
- unsigned int gid;
- unsigned char ctxnum;
- unsigned char cbrcnt;
- unsigned char dsrcnt;
- pid_t pid;
- unsigned long vaddr;
- int cch_locked;
- unsigned long data[];
-};
-
-/*
- * GRU configuration info (temp - for testing)
- */
-struct gru_config_info {
- int cpus;
- int blades;
- int nodes;
- int chiplets;
- int fill[16];
-};
-
-#endif /* __GRULIB_H__ */
diff --git a/drivers/misc/sgi-gru/grumain.c b/drivers/misc/sgi-gru/grumain.c
deleted file mode 100644
index 278b76cbd281..000000000000
--- a/drivers/misc/sgi-gru/grumain.c
+++ /dev/null
@@ -1,969 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * SN Platform GRU Driver
- *
- * DRIVER TABLE MANAGER + GRU CONTEXT LOAD/UNLOAD
- *
- * Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
- */
-
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/mm.h>
-#include <linux/spinlock.h>
-#include <linux/sched.h>
-#include <linux/device.h>
-#include <linux/list.h>
-#include <linux/err.h>
-#include <linux/prefetch.h>
-#include <asm/uv/uv_hub.h>
-#include "gru.h"
-#include "grutables.h"
-#include "gruhandles.h"
-
-unsigned long gru_options __read_mostly;
-
-static struct device_driver gru_driver = {
- .name = "gru"
-};
-
-static struct device gru_device = {
- .init_name = "",
- .driver = &gru_driver,
-};
-
-struct device *grudev = &gru_device;
-
-/*
- * Select a gru fault map to be used by the current cpu. Note that
- * multiple cpus may be using the same map.
- * ZZZ should be inline but did not work on emulator
- */
-int gru_cpu_fault_map_id(void)
-{
- int cpu = smp_processor_id();
- int id, core;
-
- core = uv_cpu_core_number(cpu);
- id = core + UV_MAX_INT_CORES * uv_cpu_socket_number(cpu);
- return id;
-}
-
-/*--------- ASID Management -------------------------------------------
- *
- * Initially, assign asids sequentially from MIN_ASID .. MAX_ASID.
- * Once MAX is reached, flush the TLB & start over. However,
- * some asids may still be in use. There won't be many (percentage wise) still
- * in use. Search active contexts & determine the value of the first
- * asid in use ("x"s below). Set "limit" to this value.
- * This defines a block of assignable asids.
- *
- * When "limit" is reached, search forward from limit+1 and determine the
- * next block of assignable asids.
- *
- * Repeat until MAX_ASID is reached, then start over again.
- *
- * Each time MAX_ASID is reached, increment the asid generation. Since
- * the search for in-use asids only checks contexts with GRUs currently
- * assigned, asids in some contexts will be missed. Prior to loading
- * a context, the asid generation of the GTS asid is rechecked. If it
- * doesn't match the current generation, a new asid will be assigned.
- *
- * 0---------------x------------x---------------------x----|
- * ^-next ^-limit ^-MAX_ASID
- *
- * All asid manipulation & context loading/unloading is protected by the
- * gs_lock.
- */
-
-/* Hit the asid limit. Start over */
-static int gru_wrap_asid(struct gru_state *gru)
-{
- gru_dbg(grudev, "gid %d\n", gru->gs_gid);
- STAT(asid_wrap);
- gru->gs_asid_gen++;
- return MIN_ASID;
-}
-
-/* Find the next chunk of unused asids */
-static int gru_reset_asid_limit(struct gru_state *gru, int asid)
-{
- int i, gid, inuse_asid, limit;
-
- gru_dbg(grudev, "gid %d, asid 0x%x\n", gru->gs_gid, asid);
- STAT(asid_next);
- limit = MAX_ASID;
- if (asid >= limit)
- asid = gru_wrap_asid(gru);
- gru_flush_all_tlb(gru);
- gid = gru->gs_gid;
-again:
- for (i = 0; i < GRU_NUM_CCH; i++) {
- if (!gru->gs_gts[i] || is_kernel_context(gru->gs_gts[i]))
- continue;
- inuse_asid = gru->gs_gts[i]->ts_gms->ms_asids[gid].mt_asid;
- gru_dbg(grudev, "gid %d, gts %p, gms %p, inuse 0x%x, cxt %d\n",
- gru->gs_gid, gru->gs_gts[i], gru->gs_gts[i]->ts_gms,
- inuse_asid, i);
- if (inuse_asid == asid) {
- asid += ASID_INC;
- if (asid >= limit) {
- /*
- * empty range: reset the range limit and
- * start over
- */
- limit = MAX_ASID;
- if (asid >= MAX_ASID)
- asid = gru_wrap_asid(gru);
- goto again;
- }
- }
-
- if ((inuse_asid > asid) && (inuse_asid < limit))
- limit = inuse_asid;
- }
- gru->gs_asid_limit = limit;
- gru->gs_asid = asid;
- gru_dbg(grudev, "gid %d, new asid 0x%x, new_limit 0x%x\n", gru->gs_gid,
- asid, limit);
- return asid;
-}
-
-/* Assign a new ASID to a thread context. */
-static int gru_assign_asid(struct gru_state *gru)
-{
- int asid;
-
- gru->gs_asid += ASID_INC;
- asid = gru->gs_asid;
- if (asid >= gru->gs_asid_limit)
- asid = gru_reset_asid_limit(gru, asid);
-
- gru_dbg(grudev, "gid %d, asid 0x%x\n", gru->gs_gid, asid);
- return asid;
-}
-
-/*
- * Clear n bits in a word. Return a word indicating the bits that were cleared.
- * Optionally, build an array of chars that contain the bit numbers allocated.
- */
-static unsigned long reserve_resources(unsigned long *p, int n, int mmax,
- signed char *idx)
-{
- unsigned long bits = 0;
- int i;
-
- while (n--) {
- i = find_first_bit(p, mmax);
- if (i == mmax)
- BUG();
- __clear_bit(i, p);
- __set_bit(i, &bits);
- if (idx)
- *idx++ = i;
- }
- return bits;
-}
-
-unsigned long gru_reserve_cb_resources(struct gru_state *gru, int cbr_au_count,
- signed char *cbmap)
-{
- return reserve_resources(&gru->gs_cbr_map, cbr_au_count, GRU_CBR_AU,
- cbmap);
-}
-
-unsigned long gru_reserve_ds_resources(struct gru_state *gru, int dsr_au_count,
- signed char *dsmap)
-{
- return reserve_resources(&gru->gs_dsr_map, dsr_au_count, GRU_DSR_AU,
- dsmap);
-}
-
-static void reserve_gru_resources(struct gru_state *gru,
- struct gru_thread_state *gts)
-{
- gru->gs_active_contexts++;
- gts->ts_cbr_map =
- gru_reserve_cb_resources(gru, gts->ts_cbr_au_count,
- gts->ts_cbr_idx);
- gts->ts_dsr_map =
- gru_reserve_ds_resources(gru, gts->ts_dsr_au_count, NULL);
-}
-
-static void free_gru_resources(struct gru_state *gru,
- struct gru_thread_state *gts)
-{
- gru->gs_active_contexts--;
- gru->gs_cbr_map |= gts->ts_cbr_map;
- gru->gs_dsr_map |= gts->ts_dsr_map;
-}
-
-/*
- * Check if a GRU has sufficient free resources to satisfy an allocation
- * request. Note: GRU locks may or may not be held when this is called. If
- * not held, recheck after acquiring the appropriate locks.
- *
- * Returns 1 if sufficient resources, 0 if not
- */
-static int check_gru_resources(struct gru_state *gru, int cbr_au_count,
- int dsr_au_count, int max_active_contexts)
-{
- return hweight64(gru->gs_cbr_map) >= cbr_au_count
- && hweight64(gru->gs_dsr_map) >= dsr_au_count
- && gru->gs_active_contexts < max_active_contexts;
-}
-
-/*
- * TLB manangment requires tracking all GRU chiplets that have loaded a GSEG
- * context.
- */
-static int gru_load_mm_tracker(struct gru_state *gru,
- struct gru_thread_state *gts)
-{
- struct gru_mm_struct *gms = gts->ts_gms;
- struct gru_mm_tracker *asids = &gms->ms_asids[gru->gs_gid];
- unsigned short ctxbitmap = (1 << gts->ts_ctxnum);
- int asid;
-
- spin_lock(&gms->ms_asid_lock);
- asid = asids->mt_asid;
-
- spin_lock(&gru->gs_asid_lock);
- if (asid == 0 || (asids->mt_ctxbitmap == 0 && asids->mt_asid_gen !=
- gru->gs_asid_gen)) {
- asid = gru_assign_asid(gru);
- asids->mt_asid = asid;
- asids->mt_asid_gen = gru->gs_asid_gen;
- STAT(asid_new);
- } else {
- STAT(asid_reuse);
- }
- spin_unlock(&gru->gs_asid_lock);
-
- BUG_ON(asids->mt_ctxbitmap & ctxbitmap);
- asids->mt_ctxbitmap |= ctxbitmap;
- if (!test_bit(gru->gs_gid, gms->ms_asidmap))
- __set_bit(gru->gs_gid, gms->ms_asidmap);
- spin_unlock(&gms->ms_asid_lock);
-
- gru_dbg(grudev,
- "gid %d, gts %p, gms %p, ctxnum %d, asid 0x%x, asidmap 0x%lx\n",
- gru->gs_gid, gts, gms, gts->ts_ctxnum, asid,
- gms->ms_asidmap[0]);
- return asid;
-}
-
-static void gru_unload_mm_tracker(struct gru_state *gru,
- struct gru_thread_state *gts)
-{
- struct gru_mm_struct *gms = gts->ts_gms;
- struct gru_mm_tracker *asids;
- unsigned short ctxbitmap;
-
- asids = &gms->ms_asids[gru->gs_gid];
- ctxbitmap = (1 << gts->ts_ctxnum);
- spin_lock(&gms->ms_asid_lock);
- spin_lock(&gru->gs_asid_lock);
- BUG_ON((asids->mt_ctxbitmap & ctxbitmap) != ctxbitmap);
- asids->mt_ctxbitmap ^= ctxbitmap;
- gru_dbg(grudev, "gid %d, gts %p, gms %p, ctxnum %d, asidmap 0x%lx\n",
- gru->gs_gid, gts, gms, gts->ts_ctxnum, gms->ms_asidmap[0]);
- spin_unlock(&gru->gs_asid_lock);
- spin_unlock(&gms->ms_asid_lock);
-}
-
-/*
- * Decrement the reference count on a GTS structure. Free the structure
- * if the reference count goes to zero.
- */
-void gts_drop(struct gru_thread_state *gts)
-{
- if (gts && refcount_dec_and_test(>s->ts_refcnt)) {
- if (gts->ts_gms)
- gru_drop_mmu_notifier(gts->ts_gms);
- kfree(gts);
- STAT(gts_free);
- }
-}
-
-/*
- * Locate the GTS structure for the current thread.
- */
-static struct gru_thread_state *gru_find_current_gts_nolock(struct gru_vma_data
- *vdata, int tsid)
-{
- struct gru_thread_state *gts;
-
- list_for_each_entry(gts, &vdata->vd_head, ts_next)
- if (gts->ts_tsid == tsid)
- return gts;
- return NULL;
-}
-
-/*
- * Allocate a thread state structure.
- */
-struct gru_thread_state *gru_alloc_gts(struct vm_area_struct *vma,
- int cbr_au_count, int dsr_au_count,
- unsigned char tlb_preload_count, int options, int tsid)
-{
- struct gru_thread_state *gts;
- struct gru_mm_struct *gms;
- int bytes;
-
- bytes = DSR_BYTES(dsr_au_count) + CBR_BYTES(cbr_au_count);
- bytes += sizeof(struct gru_thread_state);
- gts = kmalloc(bytes, GFP_KERNEL);
- if (!gts)
- return ERR_PTR(-ENOMEM);
-
- STAT(gts_alloc);
- memset(gts, 0, sizeof(struct gru_thread_state)); /* zero out header */
- refcount_set(>s->ts_refcnt, 1);
- mutex_init(>s->ts_ctxlock);
- gts->ts_cbr_au_count = cbr_au_count;
- gts->ts_dsr_au_count = dsr_au_count;
- gts->ts_tlb_preload_count = tlb_preload_count;
- gts->ts_user_options = options;
- gts->ts_user_blade_id = -1;
- gts->ts_user_chiplet_id = -1;
- gts->ts_tsid = tsid;
- gts->ts_ctxnum = NULLCTX;
- gts->ts_tlb_int_select = -1;
- gts->ts_cch_req_slice = -1;
- gts->ts_sizeavail = GRU_SIZEAVAIL(PAGE_SHIFT);
- if (vma) {
- gts->ts_mm = current->mm;
- gts->ts_vma = vma;
- gms = gru_register_mmu_notifier();
- if (IS_ERR(gms))
- goto err;
- gts->ts_gms = gms;
- }
-
- gru_dbg(grudev, "alloc gts %p\n", gts);
- return gts;
-
-err:
- gts_drop(gts);
- return ERR_CAST(gms);
-}
-
-/*
- * Allocate a vma private data structure.
- */
-struct gru_vma_data *gru_alloc_vma_data(struct vm_area_struct *vma, int tsid)
-{
- struct gru_vma_data *vdata = NULL;
-
- vdata = kmalloc_obj(*vdata);
- if (!vdata)
- return NULL;
-
- STAT(vdata_alloc);
- INIT_LIST_HEAD(&vdata->vd_head);
- spin_lock_init(&vdata->vd_lock);
- gru_dbg(grudev, "alloc vdata %p\n", vdata);
- return vdata;
-}
-
-/*
- * Find the thread state structure for the current thread.
- */
-struct gru_thread_state *gru_find_thread_state(struct vm_area_struct *vma,
- int tsid)
-{
- struct gru_vma_data *vdata = vma->vm_private_data;
- struct gru_thread_state *gts;
-
- spin_lock(&vdata->vd_lock);
- gts = gru_find_current_gts_nolock(vdata, tsid);
- spin_unlock(&vdata->vd_lock);
- gru_dbg(grudev, "vma %p, gts %p\n", vma, gts);
- return gts;
-}
-
-/*
- * Allocate a new thread state for a GSEG. Note that races may allow
- * another thread to race to create a gts.
- */
-struct gru_thread_state *gru_alloc_thread_state(struct vm_area_struct *vma,
- int tsid)
-{
- struct gru_vma_data *vdata = vma->vm_private_data;
- struct gru_thread_state *gts, *ngts;
-
- gts = gru_alloc_gts(vma, vdata->vd_cbr_au_count,
- vdata->vd_dsr_au_count,
- vdata->vd_tlb_preload_count,
- vdata->vd_user_options, tsid);
- if (IS_ERR(gts))
- return gts;
-
- spin_lock(&vdata->vd_lock);
- ngts = gru_find_current_gts_nolock(vdata, tsid);
- if (ngts) {
- gts_drop(gts);
- gts = ngts;
- STAT(gts_double_allocate);
- } else {
- list_add(>s->ts_next, &vdata->vd_head);
- }
- spin_unlock(&vdata->vd_lock);
- gru_dbg(grudev, "vma %p, gts %p\n", vma, gts);
- return gts;
-}
-
-/*
- * Free the GRU context assigned to the thread state.
- */
-static void gru_free_gru_context(struct gru_thread_state *gts)
-{
- struct gru_state *gru;
-
- gru = gts->ts_gru;
- gru_dbg(grudev, "gts %p, gid %d\n", gts, gru->gs_gid);
-
- spin_lock(&gru->gs_lock);
- gru->gs_gts[gts->ts_ctxnum] = NULL;
- free_gru_resources(gru, gts);
- BUG_ON(test_bit(gts->ts_ctxnum, &gru->gs_context_map) == 0);
- __clear_bit(gts->ts_ctxnum, &gru->gs_context_map);
- gts->ts_ctxnum = NULLCTX;
- gts->ts_gru = NULL;
- gts->ts_blade = -1;
- spin_unlock(&gru->gs_lock);
-
- gts_drop(gts);
- STAT(free_context);
-}
-
-/*
- * Prefetching cachelines help hardware performance.
- * (Strictly a performance enhancement. Not functionally required).
- */
-static void prefetch_data(void *p, int num, int stride)
-{
- while (num-- > 0) {
- prefetchw(p);
- p += stride;
- }
-}
-
-static inline long gru_copy_handle(void *d, void *s)
-{
- memcpy(d, s, GRU_HANDLE_BYTES);
- return GRU_HANDLE_BYTES;
-}
-
-static void gru_prefetch_context(void *gseg, void *cb, void *cbe,
- unsigned long cbrmap, unsigned long length)
-{
- int i, scr;
-
- prefetch_data(gseg + GRU_DS_BASE, length / GRU_CACHE_LINE_BYTES,
- GRU_CACHE_LINE_BYTES);
-
- for_each_cbr_in_allocation_map(i, &cbrmap, scr) {
- prefetch_data(cb, 1, GRU_CACHE_LINE_BYTES);
- prefetch_data(cbe + i * GRU_HANDLE_STRIDE, 1,
- GRU_CACHE_LINE_BYTES);
- cb += GRU_HANDLE_STRIDE;
- }
-}
-
-static void gru_load_context_data(void *save, void *grubase, int ctxnum,
- unsigned long cbrmap, unsigned long dsrmap,
- int data_valid)
-{
- void *gseg, *cb, *cbe;
- unsigned long length;
- int i, scr;
-
- gseg = grubase + ctxnum * GRU_GSEG_STRIDE;
- cb = gseg + GRU_CB_BASE;
- cbe = grubase + GRU_CBE_BASE;
- length = hweight64(dsrmap) * GRU_DSR_AU_BYTES;
- gru_prefetch_context(gseg, cb, cbe, cbrmap, length);
-
- for_each_cbr_in_allocation_map(i, &cbrmap, scr) {
- if (data_valid) {
- save += gru_copy_handle(cb, save);
- save += gru_copy_handle(cbe + i * GRU_HANDLE_STRIDE,
- save);
- } else {
- memset(cb, 0, GRU_CACHE_LINE_BYTES);
- memset(cbe + i * GRU_HANDLE_STRIDE, 0,
- GRU_CACHE_LINE_BYTES);
- }
- /* Flush CBE to hide race in context restart */
- mb();
- gru_flush_cache(cbe + i * GRU_HANDLE_STRIDE);
- cb += GRU_HANDLE_STRIDE;
- }
-
- if (data_valid)
- memcpy(gseg + GRU_DS_BASE, save, length);
- else
- memset(gseg + GRU_DS_BASE, 0, length);
-}
-
-static void gru_unload_context_data(void *save, void *grubase, int ctxnum,
- unsigned long cbrmap, unsigned long dsrmap)
-{
- void *gseg, *cb, *cbe;
- unsigned long length;
- int i, scr;
-
- gseg = grubase + ctxnum * GRU_GSEG_STRIDE;
- cb = gseg + GRU_CB_BASE;
- cbe = grubase + GRU_CBE_BASE;
- length = hweight64(dsrmap) * GRU_DSR_AU_BYTES;
-
- /* CBEs may not be coherent. Flush them from cache */
- for_each_cbr_in_allocation_map(i, &cbrmap, scr)
- gru_flush_cache(cbe + i * GRU_HANDLE_STRIDE);
- mb(); /* Let the CL flush complete */
-
- gru_prefetch_context(gseg, cb, cbe, cbrmap, length);
-
- for_each_cbr_in_allocation_map(i, &cbrmap, scr) {
- save += gru_copy_handle(save, cb);
- save += gru_copy_handle(save, cbe + i * GRU_HANDLE_STRIDE);
- cb += GRU_HANDLE_STRIDE;
- }
- memcpy(save, gseg + GRU_DS_BASE, length);
-}
-
-void gru_unload_context(struct gru_thread_state *gts, int savestate)
-{
- struct gru_state *gru = gts->ts_gru;
- struct gru_context_configuration_handle *cch;
- int ctxnum = gts->ts_ctxnum;
-
- if (!is_kernel_context(gts))
- zap_special_vma_range(gts->ts_vma, UGRUADDR(gts), GRU_GSEG_PAGESIZE);
- cch = get_cch(gru->gs_gru_base_vaddr, ctxnum);
-
- gru_dbg(grudev, "gts %p, cbrmap 0x%lx, dsrmap 0x%lx\n",
- gts, gts->ts_cbr_map, gts->ts_dsr_map);
- lock_cch_handle(cch);
- if (cch_interrupt_sync(cch))
- BUG();
-
- if (!is_kernel_context(gts))
- gru_unload_mm_tracker(gru, gts);
- if (savestate) {
- gru_unload_context_data(gts->ts_gdata, gru->gs_gru_base_vaddr,
- ctxnum, gts->ts_cbr_map,
- gts->ts_dsr_map);
- gts->ts_data_valid = 1;
- }
-
- if (cch_deallocate(cch))
- BUG();
- unlock_cch_handle(cch);
-
- gru_free_gru_context(gts);
-}
-
-/*
- * Load a GRU context by copying it from the thread data structure in memory
- * to the GRU.
- */
-void gru_load_context(struct gru_thread_state *gts)
-{
- struct gru_state *gru = gts->ts_gru;
- struct gru_context_configuration_handle *cch;
- int i, err, asid, ctxnum = gts->ts_ctxnum;
-
- cch = get_cch(gru->gs_gru_base_vaddr, ctxnum);
- lock_cch_handle(cch);
- cch->tfm_fault_bit_enable =
- (gts->ts_user_options == GRU_OPT_MISS_FMM_POLL
- || gts->ts_user_options == GRU_OPT_MISS_FMM_INTR);
- cch->tlb_int_enable = (gts->ts_user_options == GRU_OPT_MISS_FMM_INTR);
- if (cch->tlb_int_enable) {
- gts->ts_tlb_int_select = gru_cpu_fault_map_id();
- cch->tlb_int_select = gts->ts_tlb_int_select;
- }
- if (gts->ts_cch_req_slice >= 0) {
- cch->req_slice_set_enable = 1;
- cch->req_slice = gts->ts_cch_req_slice;
- } else {
- cch->req_slice_set_enable =0;
- }
- cch->tfm_done_bit_enable = 0;
- cch->dsr_allocation_map = gts->ts_dsr_map;
- cch->cbr_allocation_map = gts->ts_cbr_map;
-
- if (is_kernel_context(gts)) {
- cch->unmap_enable = 1;
- cch->tfm_done_bit_enable = 1;
- cch->cb_int_enable = 1;
- cch->tlb_int_select = 0; /* For now, ints go to cpu 0 */
- } else {
- cch->unmap_enable = 0;
- cch->tfm_done_bit_enable = 0;
- cch->cb_int_enable = 0;
- asid = gru_load_mm_tracker(gru, gts);
- for (i = 0; i < 8; i++) {
- cch->asid[i] = asid + i;
- cch->sizeavail[i] = gts->ts_sizeavail;
- }
- }
-
- err = cch_allocate(cch);
- if (err) {
- gru_dbg(grudev,
- "err %d: cch %p, gts %p, cbr 0x%lx, dsr 0x%lx\n",
- err, cch, gts, gts->ts_cbr_map, gts->ts_dsr_map);
- BUG();
- }
-
- gru_load_context_data(gts->ts_gdata, gru->gs_gru_base_vaddr, ctxnum,
- gts->ts_cbr_map, gts->ts_dsr_map, gts->ts_data_valid);
-
- if (cch_start(cch))
- BUG();
- unlock_cch_handle(cch);
-
- gru_dbg(grudev, "gid %d, gts %p, cbrmap 0x%lx, dsrmap 0x%lx, tie %d, tis %d\n",
- gts->ts_gru->gs_gid, gts, gts->ts_cbr_map, gts->ts_dsr_map,
- (gts->ts_user_options == GRU_OPT_MISS_FMM_INTR), gts->ts_tlb_int_select);
-}
-
-/*
- * Update fields in an active CCH:
- * - retarget interrupts on local blade
- * - update sizeavail mask
- */
-int gru_update_cch(struct gru_thread_state *gts)
-{
- struct gru_context_configuration_handle *cch;
- struct gru_state *gru = gts->ts_gru;
- int i, ctxnum = gts->ts_ctxnum, ret = 0;
-
- cch = get_cch(gru->gs_gru_base_vaddr, ctxnum);
-
- lock_cch_handle(cch);
- if (cch->state == CCHSTATE_ACTIVE) {
- if (gru->gs_gts[gts->ts_ctxnum] != gts)
- goto exit;
- if (cch_interrupt(cch))
- BUG();
- for (i = 0; i < 8; i++)
- cch->sizeavail[i] = gts->ts_sizeavail;
- gts->ts_tlb_int_select = gru_cpu_fault_map_id();
- cch->tlb_int_select = gru_cpu_fault_map_id();
- cch->tfm_fault_bit_enable =
- (gts->ts_user_options == GRU_OPT_MISS_FMM_POLL
- || gts->ts_user_options == GRU_OPT_MISS_FMM_INTR);
- if (cch_start(cch))
- BUG();
- ret = 1;
- }
-exit:
- unlock_cch_handle(cch);
- return ret;
-}
-
-/*
- * Update CCH tlb interrupt select. Required when all the following is true:
- * - task's GRU context is loaded into a GRU
- * - task is using interrupt notification for TLB faults
- * - task has migrated to a different cpu on the same blade where
- * it was previously running.
- */
-static int gru_retarget_intr(struct gru_thread_state *gts)
-{
- if (gts->ts_tlb_int_select < 0
- || gts->ts_tlb_int_select == gru_cpu_fault_map_id())
- return 0;
-
- gru_dbg(grudev, "retarget from %d to %d\n", gts->ts_tlb_int_select,
- gru_cpu_fault_map_id());
- return gru_update_cch(gts);
-}
-
-/*
- * Check if a GRU context is allowed to use a specific chiplet. By default
- * a context is assigned to any blade-local chiplet. However, users can
- * override this.
- * Returns 1 if assignment allowed, 0 otherwise
- */
-static int gru_check_chiplet_assignment(struct gru_state *gru,
- struct gru_thread_state *gts)
-{
- int blade_id;
- int chiplet_id;
-
- blade_id = gts->ts_user_blade_id;
- if (blade_id < 0)
- blade_id = uv_numa_blade_id();
-
- chiplet_id = gts->ts_user_chiplet_id;
- return gru->gs_blade_id == blade_id &&
- (chiplet_id < 0 || chiplet_id == gru->gs_chiplet_id);
-}
-
-/*
- * Unload the gru context if it is not assigned to the correct blade or
- * chiplet. Misassignment can occur if the process migrates to a different
- * blade or if the user changes the selected blade/chiplet.
- */
-int gru_check_context_placement(struct gru_thread_state *gts)
-{
- struct gru_state *gru;
- int ret = 0;
-
- /*
- * If the current task is the context owner, verify that the
- * context is correctly placed. This test is skipped for non-owner
- * references. Pthread apps use non-owner references to the CBRs.
- */
- gru = gts->ts_gru;
- /*
- * If gru or gts->ts_tgid_owner isn't initialized properly, return
- * success to indicate that the caller does not need to unload the
- * gru context.The caller is responsible for their inspection and
- * reinitialization if needed.
- */
- if (!gru || gts->ts_tgid_owner != current->tgid)
- return ret;
-
- if (!gru_check_chiplet_assignment(gru, gts)) {
- STAT(check_context_unload);
- ret = -EINVAL;
- } else if (gru_retarget_intr(gts)) {
- STAT(check_context_retarget_intr);
- }
-
- return ret;
-}
-
-
-/*
- * Insufficient GRU resources available on the local blade. Steal a context from
- * a process. This is a hack until a _real_ resource scheduler is written....
- */
-#define next_ctxnum(n) ((n) < GRU_NUM_CCH - 2 ? (n) + 1 : 0)
-#define next_gru(b, g) (((g) < &(b)->bs_grus[GRU_CHIPLETS_PER_BLADE - 1]) ? \
- ((g)+1) : &(b)->bs_grus[0])
-
-static int is_gts_stealable(struct gru_thread_state *gts,
- struct gru_blade_state *bs)
-{
- if (is_kernel_context(gts))
- return down_write_trylock(&bs->bs_kgts_sema);
- else
- return mutex_trylock(>s->ts_ctxlock);
-}
-
-static void gts_stolen(struct gru_thread_state *gts,
- struct gru_blade_state *bs)
-{
- if (is_kernel_context(gts)) {
- up_write(&bs->bs_kgts_sema);
- STAT(steal_kernel_context);
- } else {
- mutex_unlock(>s->ts_ctxlock);
- STAT(steal_user_context);
- }
-}
-
-void gru_steal_context(struct gru_thread_state *gts)
-{
- struct gru_blade_state *blade;
- struct gru_state *gru, *gru0;
- struct gru_thread_state *ngts = NULL;
- int ctxnum, ctxnum0, flag = 0, cbr, dsr;
- int blade_id;
-
- blade_id = gts->ts_user_blade_id;
- if (blade_id < 0)
- blade_id = uv_numa_blade_id();
- cbr = gts->ts_cbr_au_count;
- dsr = gts->ts_dsr_au_count;
-
- blade = gru_base[blade_id];
- spin_lock(&blade->bs_lock);
-
- ctxnum = next_ctxnum(blade->bs_lru_ctxnum);
- gru = blade->bs_lru_gru;
- if (ctxnum == 0)
- gru = next_gru(blade, gru);
- blade->bs_lru_gru = gru;
- blade->bs_lru_ctxnum = ctxnum;
- ctxnum0 = ctxnum;
- gru0 = gru;
- while (1) {
- if (gru_check_chiplet_assignment(gru, gts)) {
- if (check_gru_resources(gru, cbr, dsr, GRU_NUM_CCH))
- break;
- spin_lock(&gru->gs_lock);
- for (; ctxnum < GRU_NUM_CCH; ctxnum++) {
- if (flag && gru == gru0 && ctxnum == ctxnum0)
- break;
- ngts = gru->gs_gts[ctxnum];
- /*
- * We are grabbing locks out of order, so trylock is
- * needed. GTSs are usually not locked, so the odds of
- * success are high. If trylock fails, try to steal a
- * different GSEG.
- */
- if (ngts && is_gts_stealable(ngts, blade))
- break;
- ngts = NULL;
- }
- spin_unlock(&gru->gs_lock);
- if (ngts || (flag && gru == gru0 && ctxnum == ctxnum0))
- break;
- }
- if (flag && gru == gru0)
- break;
- flag = 1;
- ctxnum = 0;
- gru = next_gru(blade, gru);
- }
- spin_unlock(&blade->bs_lock);
-
- if (ngts) {
- gts->ustats.context_stolen++;
- ngts->ts_steal_jiffies = jiffies;
- gru_unload_context(ngts, is_kernel_context(ngts) ? 0 : 1);
- gts_stolen(ngts, blade);
- } else {
- STAT(steal_context_failed);
- }
- gru_dbg(grudev,
- "stole gid %d, ctxnum %d from gts %p. Need cb %d, ds %d;"
- " avail cb %ld, ds %ld\n",
- gru->gs_gid, ctxnum, ngts, cbr, dsr, hweight64(gru->gs_cbr_map),
- hweight64(gru->gs_dsr_map));
-}
-
-/*
- * Assign a gru context.
- */
-static int gru_assign_context_number(struct gru_state *gru)
-{
- int ctxnum;
-
- ctxnum = find_first_zero_bit(&gru->gs_context_map, GRU_NUM_CCH);
- __set_bit(ctxnum, &gru->gs_context_map);
- return ctxnum;
-}
-
-/*
- * Scan the GRUs on the local blade & assign a GRU context.
- */
-struct gru_state *gru_assign_gru_context(struct gru_thread_state *gts)
-{
- struct gru_state *gru, *grux;
- int i, max_active_contexts;
- int blade_id = gts->ts_user_blade_id;
-
- if (blade_id < 0)
- blade_id = uv_numa_blade_id();
-again:
- gru = NULL;
- max_active_contexts = GRU_NUM_CCH;
- for_each_gru_on_blade(grux, blade_id, i) {
- if (!gru_check_chiplet_assignment(grux, gts))
- continue;
- if (check_gru_resources(grux, gts->ts_cbr_au_count,
- gts->ts_dsr_au_count,
- max_active_contexts)) {
- gru = grux;
- max_active_contexts = grux->gs_active_contexts;
- if (max_active_contexts == 0)
- break;
- }
- }
-
- if (gru) {
- spin_lock(&gru->gs_lock);
- if (!check_gru_resources(gru, gts->ts_cbr_au_count,
- gts->ts_dsr_au_count, GRU_NUM_CCH)) {
- spin_unlock(&gru->gs_lock);
- goto again;
- }
- reserve_gru_resources(gru, gts);
- gts->ts_gru = gru;
- gts->ts_blade = gru->gs_blade_id;
- gts->ts_ctxnum = gru_assign_context_number(gru);
- refcount_inc(>s->ts_refcnt);
- gru->gs_gts[gts->ts_ctxnum] = gts;
- spin_unlock(&gru->gs_lock);
-
- STAT(assign_context);
- gru_dbg(grudev,
- "gseg %p, gts %p, gid %d, ctx %d, cbr %d, dsr %d\n",
- gseg_virtual_address(gts->ts_gru, gts->ts_ctxnum), gts,
- gts->ts_gru->gs_gid, gts->ts_ctxnum,
- gts->ts_cbr_au_count, gts->ts_dsr_au_count);
- } else {
- gru_dbg(grudev, "failed to allocate a GTS %s\n", "");
- STAT(assign_context_failed);
- }
-
- return gru;
-}
-
-/*
- * gru_nopage
- *
- * Map the user's GRU segment
- *
- * Note: gru segments alway mmaped on GRU_GSEG_PAGESIZE boundaries.
- */
-vm_fault_t gru_fault(struct vm_fault *vmf)
-{
- struct vm_area_struct *vma = vmf->vma;
- struct gru_thread_state *gts;
- unsigned long paddr, vaddr;
- unsigned long expires;
-
- vaddr = vmf->address;
- gru_dbg(grudev, "vma %p, vaddr 0x%lx (0x%lx)\n",
- vma, vaddr, GSEG_BASE(vaddr));
- STAT(nopfn);
-
- /* The following check ensures vaddr is a valid address in the VMA */
- gts = gru_find_thread_state(vma, TSID(vaddr, vma));
- if (!gts)
- return VM_FAULT_SIGBUS;
-
-again:
- mutex_lock(>s->ts_ctxlock);
-
- if (gru_check_context_placement(gts)) {
- mutex_unlock(>s->ts_ctxlock);
- gru_unload_context(gts, 1);
- return VM_FAULT_NOPAGE;
- }
-
- if (!gts->ts_gru) {
- STAT(load_user_context);
- if (!gru_assign_gru_context(gts)) {
- mutex_unlock(>s->ts_ctxlock);
- set_current_state(TASK_INTERRUPTIBLE);
- schedule_timeout(GRU_ASSIGN_DELAY); /* true hack ZZZ */
- expires = gts->ts_steal_jiffies + GRU_STEAL_DELAY;
- if (time_before(expires, jiffies))
- gru_steal_context(gts);
- goto again;
- }
- gru_load_context(gts);
- paddr = gseg_physical_address(gts->ts_gru, gts->ts_ctxnum);
- remap_pfn_range(vma, vaddr & ~(GRU_GSEG_PAGESIZE - 1),
- paddr >> PAGE_SHIFT, GRU_GSEG_PAGESIZE,
- vma->vm_page_prot);
- }
-
- mutex_unlock(>s->ts_ctxlock);
-
- return VM_FAULT_NOPAGE;
-}
-
diff --git a/drivers/misc/sgi-gru/gruprocfs.c b/drivers/misc/sgi-gru/gruprocfs.c
deleted file mode 100644
index 97b8b38ab47d..000000000000
--- a/drivers/misc/sgi-gru/gruprocfs.c
+++ /dev/null
@@ -1,308 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * SN Platform GRU Driver
- *
- * PROC INTERFACES
- *
- * This file supports the /proc interfaces for the GRU driver
- *
- * Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
- */
-
-#include <linux/proc_fs.h>
-#include <linux/device.h>
-#include <linux/seq_file.h>
-#include <linux/uaccess.h>
-#include "gru.h"
-#include "grulib.h"
-#include "grutables.h"
-
-#define printstat(s, f) printstat_val(s, &gru_stats.f, #f)
-
-static void printstat_val(struct seq_file *s, atomic_long_t *v, char *id)
-{
- unsigned long val = atomic_long_read(v);
-
- seq_printf(s, "%16lu %s\n", val, id);
-}
-
-static int statistics_show(struct seq_file *s, void *p)
-{
- printstat(s, vdata_alloc);
- printstat(s, vdata_free);
- printstat(s, gts_alloc);
- printstat(s, gts_free);
- printstat(s, gms_alloc);
- printstat(s, gms_free);
- printstat(s, gts_double_allocate);
- printstat(s, assign_context);
- printstat(s, assign_context_failed);
- printstat(s, free_context);
- printstat(s, load_user_context);
- printstat(s, load_kernel_context);
- printstat(s, lock_kernel_context);
- printstat(s, unlock_kernel_context);
- printstat(s, steal_user_context);
- printstat(s, steal_kernel_context);
- printstat(s, steal_context_failed);
- printstat(s, nopfn);
- printstat(s, asid_new);
- printstat(s, asid_next);
- printstat(s, asid_wrap);
- printstat(s, asid_reuse);
- printstat(s, intr);
- printstat(s, intr_cbr);
- printstat(s, intr_tfh);
- printstat(s, intr_spurious);
- printstat(s, intr_mm_lock_failed);
- printstat(s, call_os);
- printstat(s, call_os_wait_queue);
- printstat(s, user_flush_tlb);
- printstat(s, user_unload_context);
- printstat(s, user_exception);
- printstat(s, set_context_option);
- printstat(s, check_context_retarget_intr);
- printstat(s, check_context_unload);
- printstat(s, tlb_dropin);
- printstat(s, tlb_preload_page);
- printstat(s, tlb_dropin_fail_no_asid);
- printstat(s, tlb_dropin_fail_upm);
- printstat(s, tlb_dropin_fail_invalid);
- printstat(s, tlb_dropin_fail_range_active);
- printstat(s, tlb_dropin_fail_idle);
- printstat(s, tlb_dropin_fail_fmm);
- printstat(s, tlb_dropin_fail_no_exception);
- printstat(s, tfh_stale_on_fault);
- printstat(s, mmu_invalidate_range);
- printstat(s, mmu_invalidate_page);
- printstat(s, flush_tlb);
- printstat(s, flush_tlb_gru);
- printstat(s, flush_tlb_gru_tgh);
- printstat(s, flush_tlb_gru_zero_asid);
- printstat(s, copy_gpa);
- printstat(s, read_gpa);
- printstat(s, mesq_receive);
- printstat(s, mesq_receive_none);
- printstat(s, mesq_send);
- printstat(s, mesq_send_failed);
- printstat(s, mesq_noop);
- printstat(s, mesq_send_unexpected_error);
- printstat(s, mesq_send_lb_overflow);
- printstat(s, mesq_send_qlimit_reached);
- printstat(s, mesq_send_amo_nacked);
- printstat(s, mesq_send_put_nacked);
- printstat(s, mesq_qf_locked);
- printstat(s, mesq_qf_noop_not_full);
- printstat(s, mesq_qf_switch_head_failed);
- printstat(s, mesq_qf_unexpected_error);
- printstat(s, mesq_noop_unexpected_error);
- printstat(s, mesq_noop_lb_overflow);
- printstat(s, mesq_noop_qlimit_reached);
- printstat(s, mesq_noop_amo_nacked);
- printstat(s, mesq_noop_put_nacked);
- printstat(s, mesq_noop_page_overflow);
- return 0;
-}
-
-static ssize_t statistics_write(struct file *file, const char __user *userbuf,
- size_t count, loff_t *data)
-{
- memset(&gru_stats, 0, sizeof(gru_stats));
- return count;
-}
-
-static int mcs_statistics_show(struct seq_file *s, void *p)
-{
- int op;
- unsigned long total, count, max;
- static char *id[] = {"cch_allocate", "cch_start", "cch_interrupt",
- "cch_interrupt_sync", "cch_deallocate", "tfh_write_only",
- "tfh_write_restart", "tgh_invalidate"};
-
- seq_puts(s, "#id count aver-clks max-clks\n");
- for (op = 0; op < mcsop_last; op++) {
- count = atomic_long_read(&mcs_op_statistics[op].count);
- total = atomic_long_read(&mcs_op_statistics[op].total);
- max = mcs_op_statistics[op].max;
- seq_printf(s, "%-20s%12ld%12ld%12ld\n", id[op], count,
- count ? total / count : 0, max);
- }
- return 0;
-}
-
-static ssize_t mcs_statistics_write(struct file *file,
- const char __user *userbuf, size_t count, loff_t *data)
-{
- memset(mcs_op_statistics, 0, sizeof(mcs_op_statistics));
- return count;
-}
-
-static int options_show(struct seq_file *s, void *p)
-{
- seq_printf(s, "#bitmask: 1=trace, 2=statistics\n");
- seq_printf(s, "0x%lx\n", gru_options);
- return 0;
-}
-
-static ssize_t options_write(struct file *file, const char __user *userbuf,
- size_t count, loff_t *data)
-{
- int ret;
-
- ret = kstrtoul_from_user(userbuf, count, 0, &gru_options);
- if (ret)
- return ret;
-
- return count;
-}
-
-static int cch_seq_show(struct seq_file *file, void *data)
-{
- long gid = *(long *)data;
- int i;
- struct gru_state *gru = GID_TO_GRU(gid);
- struct gru_thread_state *ts;
- const char *mode[] = { "??", "UPM", "INTR", "OS_POLL" };
-
- if (gid == 0)
- seq_puts(file, "# gid bid ctx# asid pid cbrs dsbytes mode\n");
- if (gru)
- for (i = 0; i < GRU_NUM_CCH; i++) {
- ts = gru->gs_gts[i];
- if (!ts)
- continue;
- seq_printf(file, " %5d%5d%6d%7d%9d%6d%8d%8s\n",
- gru->gs_gid, gru->gs_blade_id, i,
- is_kernel_context(ts) ? 0 : ts->ts_gms->ms_asids[gid].mt_asid,
- is_kernel_context(ts) ? 0 : ts->ts_tgid_owner,
- ts->ts_cbr_au_count * GRU_CBR_AU_SIZE,
- ts->ts_cbr_au_count * GRU_DSR_AU_BYTES,
- mode[ts->ts_user_options &
- GRU_OPT_MISS_MASK]);
- }
-
- return 0;
-}
-
-static int gru_seq_show(struct seq_file *file, void *data)
-{
- long gid = *(long *)data, ctxfree, cbrfree, dsrfree;
- struct gru_state *gru = GID_TO_GRU(gid);
-
- if (gid == 0) {
- seq_puts(file, "# gid nid ctx cbr dsr ctx cbr dsr\n");
- seq_puts(file, "# busy busy busy free free free\n");
- }
- if (gru) {
- ctxfree = GRU_NUM_CCH - gru->gs_active_contexts;
- cbrfree = hweight64(gru->gs_cbr_map) * GRU_CBR_AU_SIZE;
- dsrfree = hweight64(gru->gs_dsr_map) * GRU_DSR_AU_BYTES;
- seq_printf(file, " %5d%5d%7ld%6ld%6ld%8ld%6ld%6ld\n",
- gru->gs_gid, gru->gs_blade_id, GRU_NUM_CCH - ctxfree,
- GRU_NUM_CBE - cbrfree, GRU_NUM_DSR_BYTES - dsrfree,
- ctxfree, cbrfree, dsrfree);
- }
-
- return 0;
-}
-
-static void seq_stop(struct seq_file *file, void *data)
-{
-}
-
-static void *seq_start(struct seq_file *file, loff_t *gid)
-{
- if (*gid < gru_max_gids)
- return gid;
- return NULL;
-}
-
-static void *seq_next(struct seq_file *file, void *data, loff_t *gid)
-{
- (*gid)++;
- if (*gid < gru_max_gids)
- return gid;
- return NULL;
-}
-
-static const struct seq_operations cch_seq_ops = {
- .start = seq_start,
- .next = seq_next,
- .stop = seq_stop,
- .show = cch_seq_show
-};
-
-static const struct seq_operations gru_seq_ops = {
- .start = seq_start,
- .next = seq_next,
- .stop = seq_stop,
- .show = gru_seq_show
-};
-
-static int statistics_open(struct inode *inode, struct file *file)
-{
- return single_open(file, statistics_show, NULL);
-}
-
-static int mcs_statistics_open(struct inode *inode, struct file *file)
-{
- return single_open(file, mcs_statistics_show, NULL);
-}
-
-static int options_open(struct inode *inode, struct file *file)
-{
- return single_open(file, options_show, NULL);
-}
-
-/* *INDENT-OFF* */
-static const struct proc_ops statistics_proc_ops = {
- .proc_open = statistics_open,
- .proc_read = seq_read,
- .proc_write = statistics_write,
- .proc_lseek = seq_lseek,
- .proc_release = single_release,
-};
-
-static const struct proc_ops mcs_statistics_proc_ops = {
- .proc_open = mcs_statistics_open,
- .proc_read = seq_read,
- .proc_write = mcs_statistics_write,
- .proc_lseek = seq_lseek,
- .proc_release = single_release,
-};
-
-static const struct proc_ops options_proc_ops = {
- .proc_open = options_open,
- .proc_read = seq_read,
- .proc_write = options_write,
- .proc_lseek = seq_lseek,
- .proc_release = single_release,
-};
-
-static struct proc_dir_entry *proc_gru __read_mostly;
-
-int gru_proc_init(void)
-{
- proc_gru = proc_mkdir("sgi_uv/gru", NULL);
- if (!proc_gru)
- return -1;
- if (!proc_create("statistics", 0644, proc_gru, &statistics_proc_ops))
- goto err;
- if (!proc_create("mcs_statistics", 0644, proc_gru, &mcs_statistics_proc_ops))
- goto err;
- if (!proc_create("debug_options", 0644, proc_gru, &options_proc_ops))
- goto err;
- if (!proc_create_seq("cch_status", 0444, proc_gru, &cch_seq_ops))
- goto err;
- if (!proc_create_seq("gru_status", 0444, proc_gru, &gru_seq_ops))
- goto err;
- return 0;
-err:
- remove_proc_subtree("sgi_uv/gru", NULL);
- return -1;
-}
-
-void gru_proc_exit(void)
-{
- remove_proc_subtree("sgi_uv/gru", NULL);
-}
diff --git a/drivers/misc/sgi-gru/grutables.h b/drivers/misc/sgi-gru/grutables.h
deleted file mode 100644
index 640daf1994df..000000000000
--- a/drivers/misc/sgi-gru/grutables.h
+++ /dev/null
@@ -1,659 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/*
- * SN Platform GRU Driver
- *
- * GRU DRIVER TABLES, MACROS, externs, etc
- *
- * Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
- */
-
-#ifndef __GRUTABLES_H__
-#define __GRUTABLES_H__
-
-/*
- * GRU Chiplet:
- * The GRU is a user addressible memory accelerator. It provides
- * several forms of load, store, memset, bcopy instructions. In addition, it
- * contains special instructions for AMOs, sending messages to message
- * queues, etc.
- *
- * The GRU is an integral part of the node controller. It connects
- * directly to the cpu socket. In its current implementation, there are 2
- * GRU chiplets in the node controller on each blade (~node).
- *
- * The entire GRU memory space is fully coherent and cacheable by the cpus.
- *
- * Each GRU chiplet has a physical memory map that looks like the following:
- *
- * +-----------------+
- * |/////////////////|
- * |/////////////////|
- * |/////////////////|
- * |/////////////////|
- * |/////////////////|
- * |/////////////////|
- * |/////////////////|
- * |/////////////////|
- * +-----------------+
- * | system control |
- * +-----------------+ _______ +-------------+
- * |/////////////////| / | |
- * |/////////////////| / | |
- * |/////////////////| / | instructions|
- * |/////////////////| / | |
- * |/////////////////| / | |
- * |/////////////////| / |-------------|
- * |/////////////////| / | |
- * +-----------------+ | |
- * | context 15 | | data |
- * +-----------------+ | |
- * | ...... | \ | |
- * +-----------------+ \____________ +-------------+
- * | context 1 |
- * +-----------------+
- * | context 0 |
- * +-----------------+
- *
- * Each of the "contexts" is a chunk of memory that can be mmaped into user
- * space. The context consists of 2 parts:
- *
- * - an instruction space that can be directly accessed by the user
- * to issue GRU instructions and to check instruction status.
- *
- * - a data area that acts as normal RAM.
- *
- * User instructions contain virtual addresses of data to be accessed by the
- * GRU. The GRU contains a TLB that is used to convert these user virtual
- * addresses to physical addresses.
- *
- * The "system control" area of the GRU chiplet is used by the kernel driver
- * to manage user contexts and to perform functions such as TLB dropin and
- * purging.
- *
- * One context may be reserved for the kernel and used for cross-partition
- * communication. The GRU will also be used to asynchronously zero out
- * large blocks of memory (not currently implemented).
- *
- *
- * Tables:
- *
- * VDATA-VMA Data - Holds a few parameters. Head of linked list of
- * GTS tables for threads using the GSEG
- * GTS - Gru Thread State - contains info for managing a GSEG context. A
- * GTS is allocated for each thread accessing a
- * GSEG.
- * GTD - GRU Thread Data - contains shadow copy of GRU data when GSEG is
- * not loaded into a GRU
- * GMS - GRU Memory Struct - Used to manage TLB shootdowns. Tracks GRUs
- * where a GSEG has been loaded. Similar to
- * an mm_struct but for GRU.
- *
- * GS - GRU State - Used to manage the state of a GRU chiplet
- * BS - Blade State - Used to manage state of all GRU chiplets
- * on a blade
- *
- *
- * Normal task tables for task using GRU.
- * - 2 threads in process
- * - 2 GSEGs open in process
- * - GSEG1 is being used by both threads
- * - GSEG2 is used only by thread 2
- *
- * task -->|
- * task ---+---> mm ->------ (notifier) -------+-> gms
- * | |
- * |--> vma -> vdata ---> gts--->| GSEG1 (thread1)
- * | | |
- * | +-> gts--->| GSEG1 (thread2)
- * | |
- * |--> vma -> vdata ---> gts--->| GSEG2 (thread2)
- * .
- * .
- *
- * GSEGs are marked DONTCOPY on fork
- *
- * At open
- * file.private_data -> NULL
- *
- * At mmap,
- * vma -> vdata
- *
- * After gseg reference
- * vma -> vdata ->gts
- *
- * After fork
- * parent
- * vma -> vdata -> gts
- * child
- * (vma is not copied)
- *
- */
-
-#include <linux/refcount.h>
-#include <linux/rmap.h>
-#include <linux/interrupt.h>
-#include <linux/mutex.h>
-#include <linux/wait.h>
-#include <linux/mmu_notifier.h>
-#include <linux/mm_types.h>
-#include "gru.h"
-#include "grulib.h"
-#include "gruhandles.h"
-
-extern struct gru_stats_s gru_stats;
-extern struct gru_blade_state *gru_base[];
-extern unsigned long gru_start_paddr, gru_end_paddr;
-extern void *gru_start_vaddr;
-extern unsigned int gru_max_gids;
-
-#define GRU_MAX_BLADES MAX_NUMNODES
-#define GRU_MAX_GRUS (GRU_MAX_BLADES * GRU_CHIPLETS_PER_BLADE)
-
-#define GRU_DRIVER_ID_STR "SGI GRU Device Driver"
-#define GRU_DRIVER_VERSION_STR "0.85"
-
-/*
- * GRU statistics.
- */
-struct gru_stats_s {
- atomic_long_t vdata_alloc;
- atomic_long_t vdata_free;
- atomic_long_t gts_alloc;
- atomic_long_t gts_free;
- atomic_long_t gms_alloc;
- atomic_long_t gms_free;
- atomic_long_t gts_double_allocate;
- atomic_long_t assign_context;
- atomic_long_t assign_context_failed;
- atomic_long_t free_context;
- atomic_long_t load_user_context;
- atomic_long_t load_kernel_context;
- atomic_long_t lock_kernel_context;
- atomic_long_t unlock_kernel_context;
- atomic_long_t steal_user_context;
- atomic_long_t steal_kernel_context;
- atomic_long_t steal_context_failed;
- atomic_long_t nopfn;
- atomic_long_t asid_new;
- atomic_long_t asid_next;
- atomic_long_t asid_wrap;
- atomic_long_t asid_reuse;
- atomic_long_t intr;
- atomic_long_t intr_cbr;
- atomic_long_t intr_tfh;
- atomic_long_t intr_spurious;
- atomic_long_t intr_mm_lock_failed;
- atomic_long_t call_os;
- atomic_long_t call_os_wait_queue;
- atomic_long_t user_flush_tlb;
- atomic_long_t user_unload_context;
- atomic_long_t user_exception;
- atomic_long_t set_context_option;
- atomic_long_t check_context_retarget_intr;
- atomic_long_t check_context_unload;
- atomic_long_t tlb_dropin;
- atomic_long_t tlb_preload_page;
- atomic_long_t tlb_dropin_fail_no_asid;
- atomic_long_t tlb_dropin_fail_upm;
- atomic_long_t tlb_dropin_fail_invalid;
- atomic_long_t tlb_dropin_fail_range_active;
- atomic_long_t tlb_dropin_fail_idle;
- atomic_long_t tlb_dropin_fail_fmm;
- atomic_long_t tlb_dropin_fail_no_exception;
- atomic_long_t tfh_stale_on_fault;
- atomic_long_t mmu_invalidate_range;
- atomic_long_t mmu_invalidate_page;
- atomic_long_t flush_tlb;
- atomic_long_t flush_tlb_gru;
- atomic_long_t flush_tlb_gru_tgh;
- atomic_long_t flush_tlb_gru_zero_asid;
-
- atomic_long_t copy_gpa;
- atomic_long_t read_gpa;
-
- atomic_long_t mesq_receive;
- atomic_long_t mesq_receive_none;
- atomic_long_t mesq_send;
- atomic_long_t mesq_send_failed;
- atomic_long_t mesq_noop;
- atomic_long_t mesq_send_unexpected_error;
- atomic_long_t mesq_send_lb_overflow;
- atomic_long_t mesq_send_qlimit_reached;
- atomic_long_t mesq_send_amo_nacked;
- atomic_long_t mesq_send_put_nacked;
- atomic_long_t mesq_page_overflow;
- atomic_long_t mesq_qf_locked;
- atomic_long_t mesq_qf_noop_not_full;
- atomic_long_t mesq_qf_switch_head_failed;
- atomic_long_t mesq_qf_unexpected_error;
- atomic_long_t mesq_noop_unexpected_error;
- atomic_long_t mesq_noop_lb_overflow;
- atomic_long_t mesq_noop_qlimit_reached;
- atomic_long_t mesq_noop_amo_nacked;
- atomic_long_t mesq_noop_put_nacked;
- atomic_long_t mesq_noop_page_overflow;
-
-};
-
-enum mcs_op {cchop_allocate, cchop_start, cchop_interrupt, cchop_interrupt_sync,
- cchop_deallocate, tfhop_write_only, tfhop_write_restart,
- tghop_invalidate, mcsop_last};
-
-struct mcs_op_statistic {
- atomic_long_t count;
- atomic_long_t total;
- unsigned long max;
-};
-
-extern struct mcs_op_statistic mcs_op_statistics[mcsop_last];
-
-#define OPT_DPRINT 1
-#define OPT_STATS 2
-
-
-#define IRQ_GRU 110 /* Starting IRQ number for interrupts */
-
-/* Delay in jiffies between attempts to assign a GRU context */
-#define GRU_ASSIGN_DELAY ((HZ * 20) / 1000)
-
-/*
- * If a process has it's context stolen, min delay in jiffies before trying to
- * steal a context from another process.
- */
-#define GRU_STEAL_DELAY ((HZ * 200) / 1000)
-
-#define STAT(id) do { \
- if (gru_options & OPT_STATS) \
- atomic_long_inc(&gru_stats.id); \
- } while (0)
-
-#ifdef CONFIG_SGI_GRU_DEBUG
-#define gru_dbg(dev, fmt, x...) \
- do { \
- if (gru_options & OPT_DPRINT) \
- printk(KERN_DEBUG "GRU:%d %s: " fmt, smp_processor_id(), __func__, x);\
- } while (0)
-#else
-#define gru_dbg(x...)
-#endif
-
-/*-----------------------------------------------------------------------------
- * ASID management
- */
-#define MAX_ASID 0xfffff0
-#define MIN_ASID 8
-#define ASID_INC 8 /* number of regions */
-
-/* Generate a GRU asid value from a GRU base asid & a virtual address. */
-#define VADDR_HI_BIT 64
-#define GRUREGION(addr) ((addr) >> (VADDR_HI_BIT - 3) & 3)
-#define GRUASID(asid, addr) ((asid) + GRUREGION(addr))
-
-/*------------------------------------------------------------------------------
- * File & VMS Tables
- */
-
-struct gru_state;
-
-/*
- * This structure is pointed to from the mmstruct via the notifier pointer.
- * There is one of these per address space.
- */
-struct gru_mm_tracker { /* pack to reduce size */
- unsigned int mt_asid_gen:24; /* ASID wrap count */
- unsigned int mt_asid:24; /* current base ASID for gru */
- unsigned short mt_ctxbitmap:16;/* bitmap of contexts using
- asid */
-} __attribute__ ((packed));
-
-struct gru_mm_struct {
- struct mmu_notifier ms_notifier;
- spinlock_t ms_asid_lock; /* protects ASID assignment */
- atomic_t ms_range_active;/* num range_invals active */
- wait_queue_head_t ms_wait_queue;
- DECLARE_BITMAP(ms_asidmap, GRU_MAX_GRUS);
- struct gru_mm_tracker ms_asids[GRU_MAX_GRUS];
-};
-
-/*
- * One of these structures is allocated when a GSEG is mmaped. The
- * structure is pointed to by the vma->vm_private_data field in the vma struct.
- */
-struct gru_vma_data {
- spinlock_t vd_lock; /* Serialize access to vma */
- struct list_head vd_head; /* head of linked list of gts */
- long vd_user_options;/* misc user option flags */
- int vd_cbr_au_count;
- int vd_dsr_au_count;
- unsigned char vd_tlb_preload_count;
-};
-
-/*
- * One of these is allocated for each thread accessing a mmaped GRU. A linked
- * list of these structure is hung off the struct gru_vma_data in the mm_struct.
- */
-struct gru_thread_state {
- struct list_head ts_next; /* list - head at vma-private */
- struct mutex ts_ctxlock; /* load/unload CTX lock */
- struct mm_struct *ts_mm; /* mm currently mapped to
- context */
- struct vm_area_struct *ts_vma; /* vma of GRU context */
- struct gru_state *ts_gru; /* GRU where the context is
- loaded */
- struct gru_mm_struct *ts_gms; /* asid & ioproc struct */
- unsigned char ts_tlb_preload_count; /* TLB preload pages */
- unsigned long ts_cbr_map; /* map of allocated CBRs */
- unsigned long ts_dsr_map; /* map of allocated DATA
- resources */
- unsigned long ts_steal_jiffies;/* jiffies when context last
- stolen */
- long ts_user_options;/* misc user option flags */
- pid_t ts_tgid_owner; /* task that is using the
- context - for migration */
- short ts_user_blade_id;/* user selected blade */
- signed char ts_user_chiplet_id;/* user selected chiplet */
- unsigned short ts_sizeavail; /* Pagesizes in use */
- int ts_tsid; /* thread that owns the
- structure */
- int ts_tlb_int_select;/* target cpu if interrupts
- enabled */
- int ts_ctxnum; /* context number where the
- context is loaded */
- refcount_t ts_refcnt; /* reference count GTS */
- unsigned char ts_dsr_au_count;/* Number of DSR resources
- required for contest */
- unsigned char ts_cbr_au_count;/* Number of CBR resources
- required for contest */
- signed char ts_cch_req_slice;/* CCH packet slice */
- signed char ts_blade; /* If >= 0, migrate context if
- ref from different blade */
- signed char ts_force_cch_reload;
- signed char ts_cbr_idx[GRU_CBR_AU];/* CBR numbers of each
- allocated CB */
- int ts_data_valid; /* Indicates if ts_gdata has
- valid data */
- struct gru_gseg_statistics ustats; /* User statistics */
- unsigned long ts_gdata[]; /* save area for GRU data (CB,
- DS, CBE) */
-};
-
-/*
- * Threaded programs actually allocate an array of GSEGs when a context is
- * created. Each thread uses a separate GSEG. TSID is the index into the GSEG
- * array.
- */
-#define TSID(a, v) (((a) - (v)->vm_start) / GRU_GSEG_PAGESIZE)
-#define UGRUADDR(gts) ((gts)->ts_vma->vm_start + \
- (gts)->ts_tsid * GRU_GSEG_PAGESIZE)
-
-#define NULLCTX (-1) /* if context not loaded into GRU */
-
-/*-----------------------------------------------------------------------------
- * GRU State Tables
- */
-
-/*
- * One of these exists for each GRU chiplet.
- */
-struct gru_state {
- struct gru_blade_state *gs_blade; /* GRU state for entire
- blade */
- unsigned long gs_gru_base_paddr; /* Physical address of
- gru segments (64) */
- void *gs_gru_base_vaddr; /* Virtual address of
- gru segments (64) */
- unsigned short gs_gid; /* unique GRU number */
- unsigned short gs_blade_id; /* blade of GRU */
- unsigned char gs_chiplet_id; /* blade chiplet of GRU */
- unsigned char gs_tgh_local_shift; /* used to pick TGH for
- local flush */
- unsigned char gs_tgh_first_remote; /* starting TGH# for
- remote flush */
- spinlock_t gs_asid_lock; /* lock used for
- assigning asids */
- spinlock_t gs_lock; /* lock used for
- assigning contexts */
-
- /* -- the following are protected by the gs_asid_lock spinlock ---- */
- unsigned int gs_asid; /* Next availe ASID */
- unsigned int gs_asid_limit; /* Limit of available
- ASIDs */
- unsigned int gs_asid_gen; /* asid generation.
- Inc on wrap */
-
- /* --- the following fields are protected by the gs_lock spinlock --- */
- unsigned long gs_context_map; /* bitmap to manage
- contexts in use */
- unsigned long gs_cbr_map; /* bitmap to manage CB
- resources */
- unsigned long gs_dsr_map; /* bitmap used to manage
- DATA resources */
- unsigned int gs_reserved_cbrs; /* Number of kernel-
- reserved cbrs */
- unsigned int gs_reserved_dsr_bytes; /* Bytes of kernel-
- reserved dsrs */
- unsigned short gs_active_contexts; /* number of contexts
- in use */
- struct gru_thread_state *gs_gts[GRU_NUM_CCH]; /* GTS currently using
- the context */
- int gs_irq[GRU_NUM_TFM]; /* Interrupt irqs */
-};
-
-/*
- * This structure contains the GRU state for all the GRUs on a blade.
- */
-struct gru_blade_state {
- void *kernel_cb; /* First kernel
- reserved cb */
- void *kernel_dsr; /* First kernel
- reserved DSR */
- struct rw_semaphore bs_kgts_sema; /* lock for kgts */
- struct gru_thread_state *bs_kgts; /* GTS for kernel use */
-
- /* ---- the following are used for managing kernel async GRU CBRs --- */
- int bs_async_dsr_bytes; /* DSRs for async */
- int bs_async_cbrs; /* CBRs AU for async */
- struct completion *bs_async_wq;
-
- /* ---- the following are protected by the bs_lock spinlock ---- */
- spinlock_t bs_lock; /* lock used for
- stealing contexts */
- int bs_lru_ctxnum; /* STEAL - last context
- stolen */
- struct gru_state *bs_lru_gru; /* STEAL - last gru
- stolen */
-
- struct gru_state bs_grus[GRU_CHIPLETS_PER_BLADE];
-};
-
-/*-----------------------------------------------------------------------------
- * Address Primitives
- */
-#define get_tfm_for_cpu(g, c) \
- ((struct gru_tlb_fault_map *)get_tfm((g)->gs_gru_base_vaddr, (c)))
-#define get_tfh_by_index(g, i) \
- ((struct gru_tlb_fault_handle *)get_tfh((g)->gs_gru_base_vaddr, (i)))
-#define get_tgh_by_index(g, i) \
- ((struct gru_tlb_global_handle *)get_tgh((g)->gs_gru_base_vaddr, (i)))
-#define get_cbe_by_index(g, i) \
- ((struct gru_control_block_extended *)get_cbe((g)->gs_gru_base_vaddr,\
- (i)))
-
-/*-----------------------------------------------------------------------------
- * Useful Macros
- */
-
-/* Given a blade# & chiplet#, get a pointer to the GRU */
-#define get_gru(b, c) (&gru_base[b]->bs_grus[c])
-
-/* Number of bytes to save/restore when unloading/loading GRU contexts */
-#define DSR_BYTES(dsr) ((dsr) * GRU_DSR_AU_BYTES)
-#define CBR_BYTES(cbr) ((cbr) * GRU_HANDLE_BYTES * GRU_CBR_AU_SIZE * 2)
-
-/* Convert a user CB number to the actual CBRNUM */
-#define thread_cbr_number(gts, n) ((gts)->ts_cbr_idx[(n) / GRU_CBR_AU_SIZE] \
- * GRU_CBR_AU_SIZE + (n) % GRU_CBR_AU_SIZE)
-
-/* Convert a gid to a pointer to the GRU */
-#define GID_TO_GRU(gid) \
- (gru_base[(gid) / GRU_CHIPLETS_PER_BLADE] ? \
- (&gru_base[(gid) / GRU_CHIPLETS_PER_BLADE]-> \
- bs_grus[(gid) % GRU_CHIPLETS_PER_BLADE]) : \
- NULL)
-
-/* Scan all active GRUs in a GRU bitmap */
-#define for_each_gru_in_bitmap(gid, map) \
- for_each_set_bit((gid), (map), GRU_MAX_GRUS)
-
-/* Scan all active GRUs on a specific blade */
-#define for_each_gru_on_blade(gru, nid, i) \
- for ((gru) = gru_base[nid]->bs_grus, (i) = 0; \
- (i) < GRU_CHIPLETS_PER_BLADE; \
- (i)++, (gru)++)
-
-/* Scan all GRUs */
-#define foreach_gid(gid) \
- for ((gid) = 0; (gid) < gru_max_gids; (gid)++)
-
-/* Scan all active GTSs on a gru. Note: must hold ss_lock to use this macro. */
-#define for_each_gts_on_gru(gts, gru, ctxnum) \
- for ((ctxnum) = 0; (ctxnum) < GRU_NUM_CCH; (ctxnum)++) \
- if (((gts) = (gru)->gs_gts[ctxnum]))
-
-/* Scan each CBR whose bit is set in a TFM (or copy of) */
-#define for_each_cbr_in_tfm(i, map) \
- for_each_set_bit((i), (map), GRU_NUM_CBE)
-
-/* Scan each CBR in a CBR bitmap. Note: multiple CBRs in an allocation unit */
-#define for_each_cbr_in_allocation_map(i, map, k) \
- for_each_set_bit((k), (map), GRU_CBR_AU) \
- for ((i) = (k)*GRU_CBR_AU_SIZE; \
- (i) < ((k) + 1) * GRU_CBR_AU_SIZE; (i)++)
-
-#define gseg_physical_address(gru, ctxnum) \
- ((gru)->gs_gru_base_paddr + ctxnum * GRU_GSEG_STRIDE)
-#define gseg_virtual_address(gru, ctxnum) \
- ((gru)->gs_gru_base_vaddr + ctxnum * GRU_GSEG_STRIDE)
-
-/*-----------------------------------------------------------------------------
- * Lock / Unlock GRU handles
- * Use the "delresp" bit in the handle as a "lock" bit.
- */
-
-/* Lock hierarchy checking enabled only in emulator */
-
-/* 0 = lock failed, 1 = locked */
-static inline int __trylock_handle(void *h)
-{
- return !test_and_set_bit(1, h);
-}
-
-static inline void __lock_handle(void *h)
-{
- while (test_and_set_bit(1, h))
- cpu_relax();
-}
-
-static inline void __unlock_handle(void *h)
-{
- clear_bit(1, h);
-}
-
-static inline int trylock_cch_handle(struct gru_context_configuration_handle *cch)
-{
- return __trylock_handle(cch);
-}
-
-static inline void lock_cch_handle(struct gru_context_configuration_handle *cch)
-{
- __lock_handle(cch);
-}
-
-static inline void unlock_cch_handle(struct gru_context_configuration_handle
- *cch)
-{
- __unlock_handle(cch);
-}
-
-static inline void lock_tgh_handle(struct gru_tlb_global_handle *tgh)
-{
- __lock_handle(tgh);
-}
-
-static inline void unlock_tgh_handle(struct gru_tlb_global_handle *tgh)
-{
- __unlock_handle(tgh);
-}
-
-static inline int is_kernel_context(struct gru_thread_state *gts)
-{
- return !gts->ts_mm;
-}
-
-/*
- * The following are for Nehelem-EX. A more general scheme is needed for
- * future processors.
- */
-#define UV_MAX_INT_CORES 8
-#define uv_cpu_socket_number(p) ((cpu_physical_id(p) >> 5) & 1)
-#define uv_cpu_ht_number(p) (cpu_physical_id(p) & 1)
-#define uv_cpu_core_number(p) (((cpu_physical_id(p) >> 2) & 4) | \
- ((cpu_physical_id(p) >> 1) & 3))
-/*-----------------------------------------------------------------------------
- * Function prototypes & externs
- */
-struct gru_unload_context_req;
-
-extern const struct vm_operations_struct gru_vm_ops;
-extern struct device *grudev;
-
-extern struct gru_vma_data *gru_alloc_vma_data(struct vm_area_struct *vma,
- int tsid);
-extern struct gru_thread_state *gru_find_thread_state(struct vm_area_struct
- *vma, int tsid);
-extern struct gru_thread_state *gru_alloc_thread_state(struct vm_area_struct
- *vma, int tsid);
-extern struct gru_state *gru_assign_gru_context(struct gru_thread_state *gts);
-extern void gru_load_context(struct gru_thread_state *gts);
-extern void gru_steal_context(struct gru_thread_state *gts);
-extern void gru_unload_context(struct gru_thread_state *gts, int savestate);
-extern int gru_update_cch(struct gru_thread_state *gts);
-extern void gts_drop(struct gru_thread_state *gts);
-extern void gru_tgh_flush_init(struct gru_state *gru);
-extern int gru_kservices_init(void);
-extern void gru_kservices_exit(void);
-extern irqreturn_t gru0_intr(int irq, void *dev_id);
-extern irqreturn_t gru1_intr(int irq, void *dev_id);
-extern irqreturn_t gru_intr_mblade(int irq, void *dev_id);
-extern int gru_dump_chiplet_request(unsigned long arg);
-extern long gru_get_gseg_statistics(unsigned long arg);
-extern int gru_handle_user_call_os(unsigned long address);
-extern int gru_user_flush_tlb(unsigned long arg);
-extern int gru_user_unload_context(unsigned long arg);
-extern int gru_get_exception_detail(unsigned long arg);
-extern int gru_set_context_option(unsigned long address);
-extern int gru_check_context_placement(struct gru_thread_state *gts);
-extern int gru_cpu_fault_map_id(void);
-extern struct vm_area_struct *gru_find_vma(unsigned long vaddr);
-extern void gru_flush_all_tlb(struct gru_state *gru);
-extern int gru_proc_init(void);
-extern void gru_proc_exit(void);
-
-extern struct gru_thread_state *gru_alloc_gts(struct vm_area_struct *vma,
- int cbr_au_count, int dsr_au_count,
- unsigned char tlb_preload_count, int options, int tsid);
-extern unsigned long gru_reserve_cb_resources(struct gru_state *gru,
- int cbr_au_count, signed char *cbmap);
-extern unsigned long gru_reserve_ds_resources(struct gru_state *gru,
- int dsr_au_count, signed char *dsmap);
-extern vm_fault_t gru_fault(struct vm_fault *vmf);
-extern struct gru_mm_struct *gru_register_mmu_notifier(void);
-extern void gru_drop_mmu_notifier(struct gru_mm_struct *gms);
-
-extern int gru_ktest(unsigned long arg);
-extern void gru_flush_tlb_range(struct gru_mm_struct *gms, unsigned long start,
- unsigned long len);
-
-extern unsigned long gru_options;
-
-#endif /* __GRUTABLES_H__ */
diff --git a/drivers/misc/sgi-gru/grutlbpurge.c b/drivers/misc/sgi-gru/grutlbpurge.c
deleted file mode 100644
index a8121d40be68..000000000000
--- a/drivers/misc/sgi-gru/grutlbpurge.c
+++ /dev/null
@@ -1,316 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * SN Platform GRU Driver
- *
- * MMUOPS callbacks + TLB flushing
- *
- * This file handles emu notifier callbacks from the core kernel. The callbacks
- * are used to update the TLB in the GRU as a result of changes in the
- * state of a process address space. This file also handles TLB invalidates
- * from the GRU driver.
- *
- * Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
- */
-
-#include <linux/kernel.h>
-#include <linux/list.h>
-#include <linux/spinlock.h>
-#include <linux/mm.h>
-#include <linux/slab.h>
-#include <linux/device.h>
-#include <linux/hugetlb.h>
-#include <linux/delay.h>
-#include <linux/timex.h>
-#include <linux/srcu.h>
-#include <asm/processor.h>
-#include "gru.h"
-#include "grutables.h"
-#include <asm/uv/uv_hub.h>
-
-#define gru_random() get_cycles()
-
-/* ---------------------------------- TLB Invalidation functions --------
- * get_tgh_handle
- *
- * Find a TGH to use for issuing a TLB invalidate. For GRUs that are on the
- * local blade, use a fixed TGH that is a function of the blade-local cpu
- * number. Normally, this TGH is private to the cpu & no contention occurs for
- * the TGH. For offblade GRUs, select a random TGH in the range above the
- * private TGHs. A spinlock is required to access this TGH & the lock must be
- * released when the invalidate is completes. This sucks, but it is the best we
- * can do.
- *
- * Note that the spinlock is IN the TGH handle so locking does not involve
- * additional cache lines.
- *
- */
-static inline int get_off_blade_tgh(struct gru_state *gru)
-{
- int n;
-
- n = GRU_NUM_TGH - gru->gs_tgh_first_remote;
- n = gru_random() % n;
- n += gru->gs_tgh_first_remote;
- return n;
-}
-
-static inline int get_on_blade_tgh(struct gru_state *gru)
-{
- return uv_blade_processor_id() >> gru->gs_tgh_local_shift;
-}
-
-static struct gru_tlb_global_handle *get_lock_tgh_handle(struct gru_state
- *gru)
-{
- struct gru_tlb_global_handle *tgh;
- int n;
-
- if (uv_numa_blade_id() == gru->gs_blade_id)
- n = get_on_blade_tgh(gru);
- else
- n = get_off_blade_tgh(gru);
- tgh = get_tgh_by_index(gru, n);
- lock_tgh_handle(tgh);
-
- return tgh;
-}
-
-static void get_unlock_tgh_handle(struct gru_tlb_global_handle *tgh)
-{
- unlock_tgh_handle(tgh);
-}
-
-/*
- * gru_flush_tlb_range
- *
- * General purpose TLB invalidation function. This function scans every GRU in
- * the ENTIRE system (partition) looking for GRUs where the specified MM has
- * been accessed by the GRU. For each GRU found, the TLB must be invalidated OR
- * the ASID invalidated. Invalidating an ASID causes a new ASID to be assigned
- * on the next fault. This effectively flushes the ENTIRE TLB for the MM at the
- * cost of (possibly) a large number of future TLBmisses.
- *
- * The current algorithm is optimized based on the following (somewhat true)
- * assumptions:
- * - GRU contexts are not loaded into a GRU unless a reference is made to
- * the data segment or control block (this is true, not an assumption).
- * If a DS/CB is referenced, the user will also issue instructions that
- * cause TLBmisses. It is not necessary to optimize for the case where
- * contexts are loaded but no instructions cause TLB misses. (I know
- * this will happen but I'm not optimizing for it).
- * - GRU instructions to invalidate TLB entries are SLOOOOWWW - normally
- * a few usec but in unusual cases, it could be longer. Avoid if
- * possible.
- * - intrablade process migration between cpus is not frequent but is
- * common.
- * - a GRU context is not typically migrated to a different GRU on the
- * blade because of intrablade migration
- * - interblade migration is rare. Processes migrate their GRU context to
- * the new blade.
- * - if interblade migration occurs, migration back to the original blade
- * is very very rare (ie., no optimization for this case)
- * - most GRU instruction operate on a subset of the user REGIONS. Code
- * & shared library regions are not likely targets of GRU instructions.
- *
- * To help improve the efficiency of TLB invalidation, the GMS data
- * structure is maintained for EACH address space (MM struct). The GMS is
- * also the structure that contains the pointer to the mmu callout
- * functions. This structure is linked to the mm_struct for the address space
- * using the mmu "register" function. The mmu interfaces are used to
- * provide the callbacks for TLB invalidation. The GMS contains:
- *
- * - asid[maxgrus] array. ASIDs are assigned to a GRU when a context is
- * loaded into the GRU.
- * - asidmap[maxgrus]. bitmap to make it easier to find non-zero asids in
- * the above array
- * - ctxbitmap[maxgrus]. Indicates the contexts that are currently active
- * in the GRU for the address space. This bitmap must be passed to the
- * GRU to do an invalidate.
- *
- * The current algorithm for invalidating TLBs is:
- * - scan the asidmap for GRUs where the context has been loaded, ie,
- * asid is non-zero.
- * - for each gru found:
- * - if the ctxtmap is non-zero, there are active contexts in the
- * GRU. TLB invalidate instructions must be issued to the GRU.
- * - if the ctxtmap is zero, no context is active. Set the ASID to
- * zero to force a full TLB invalidation. This is fast but will
- * cause a lot of TLB misses if the context is reloaded onto the
- * GRU
- *
- */
-
-void gru_flush_tlb_range(struct gru_mm_struct *gms, unsigned long start,
- unsigned long len)
-{
- struct gru_state *gru;
- struct gru_mm_tracker *asids;
- struct gru_tlb_global_handle *tgh;
- unsigned long num;
- int grupagesize, pagesize, pageshift, gid, asid;
-
- /* ZZZ TODO - handle huge pages */
- pageshift = PAGE_SHIFT;
- pagesize = (1UL << pageshift);
- grupagesize = GRU_PAGESIZE(pageshift);
- num = min(((len + pagesize - 1) >> pageshift), GRUMAXINVAL);
-
- STAT(flush_tlb);
- gru_dbg(grudev, "gms %p, start 0x%lx, len 0x%lx, asidmap 0x%lx\n", gms,
- start, len, gms->ms_asidmap[0]);
-
- spin_lock(&gms->ms_asid_lock);
- for_each_gru_in_bitmap(gid, gms->ms_asidmap) {
- STAT(flush_tlb_gru);
- gru = GID_TO_GRU(gid);
- asids = gms->ms_asids + gid;
- asid = asids->mt_asid;
- if (asids->mt_ctxbitmap && asid) {
- STAT(flush_tlb_gru_tgh);
- asid = GRUASID(asid, start);
- gru_dbg(grudev,
- " FLUSH gruid %d, asid 0x%x, vaddr 0x%lx, vamask 0x%x, num %ld, cbmap 0x%x\n",
- gid, asid, start, grupagesize, num, asids->mt_ctxbitmap);
- tgh = get_lock_tgh_handle(gru);
- tgh_invalidate(tgh, start, ~0, asid, grupagesize, 0,
- num - 1, asids->mt_ctxbitmap);
- get_unlock_tgh_handle(tgh);
- } else {
- STAT(flush_tlb_gru_zero_asid);
- asids->mt_asid = 0;
- __clear_bit(gru->gs_gid, gms->ms_asidmap);
- gru_dbg(grudev,
- " CLEARASID gruid %d, asid 0x%x, cbtmap 0x%x, asidmap 0x%lx\n",
- gid, asid, asids->mt_ctxbitmap,
- gms->ms_asidmap[0]);
- }
- }
- spin_unlock(&gms->ms_asid_lock);
-}
-
-/*
- * Flush the entire TLB on a chiplet.
- */
-void gru_flush_all_tlb(struct gru_state *gru)
-{
- struct gru_tlb_global_handle *tgh;
-
- gru_dbg(grudev, "gid %d\n", gru->gs_gid);
- tgh = get_lock_tgh_handle(gru);
- tgh_invalidate(tgh, 0, ~0, 0, 1, 1, GRUMAXINVAL - 1, 0xffff);
- get_unlock_tgh_handle(tgh);
-}
-
-/*
- * MMUOPS notifier callout functions
- */
-static int gru_invalidate_range_start(struct mmu_notifier *mn,
- const struct mmu_notifier_range *range)
-{
- struct gru_mm_struct *gms = container_of(mn, struct gru_mm_struct,
- ms_notifier);
-
- STAT(mmu_invalidate_range);
- atomic_inc(&gms->ms_range_active);
- gru_dbg(grudev, "gms %p, start 0x%lx, end 0x%lx, act %d\n", gms,
- range->start, range->end, atomic_read(&gms->ms_range_active));
- gru_flush_tlb_range(gms, range->start, range->end - range->start);
-
- return 0;
-}
-
-static void gru_invalidate_range_end(struct mmu_notifier *mn,
- const struct mmu_notifier_range *range)
-{
- struct gru_mm_struct *gms = container_of(mn, struct gru_mm_struct,
- ms_notifier);
-
- /* ..._and_test() provides needed barrier */
- (void)atomic_dec_and_test(&gms->ms_range_active);
-
- wake_up_all(&gms->ms_wait_queue);
- gru_dbg(grudev, "gms %p, start 0x%lx, end 0x%lx\n",
- gms, range->start, range->end);
-}
-
-static struct mmu_notifier *gru_alloc_notifier(struct mm_struct *mm)
-{
- struct gru_mm_struct *gms;
-
- gms = kzalloc_obj(*gms);
- if (!gms)
- return ERR_PTR(-ENOMEM);
- STAT(gms_alloc);
- spin_lock_init(&gms->ms_asid_lock);
- init_waitqueue_head(&gms->ms_wait_queue);
-
- return &gms->ms_notifier;
-}
-
-static void gru_free_notifier(struct mmu_notifier *mn)
-{
- kfree(container_of(mn, struct gru_mm_struct, ms_notifier));
- STAT(gms_free);
-}
-
-static const struct mmu_notifier_ops gru_mmuops = {
- .invalidate_range_start = gru_invalidate_range_start,
- .invalidate_range_end = gru_invalidate_range_end,
- .alloc_notifier = gru_alloc_notifier,
- .free_notifier = gru_free_notifier,
-};
-
-struct gru_mm_struct *gru_register_mmu_notifier(void)
-{
- struct mmu_notifier *mn;
-
- mn = mmu_notifier_get_locked(&gru_mmuops, current->mm);
- if (IS_ERR(mn))
- return ERR_CAST(mn);
-
- return container_of(mn, struct gru_mm_struct, ms_notifier);
-}
-
-void gru_drop_mmu_notifier(struct gru_mm_struct *gms)
-{
- mmu_notifier_put(&gms->ms_notifier);
-}
-
-/*
- * Setup TGH parameters. There are:
- * - 24 TGH handles per GRU chiplet
- * - a portion (MAX_LOCAL_TGH) of the handles are reserved for
- * use by blade-local cpus
- * - the rest are used by off-blade cpus. This usage is
- * less frequent than blade-local usage.
- *
- * For now, use 16 handles for local flushes, 8 for remote flushes. If the blade
- * has less tan or equal to 16 cpus, each cpu has a unique handle that it can
- * use.
- */
-#define MAX_LOCAL_TGH 16
-
-void gru_tgh_flush_init(struct gru_state *gru)
-{
- int cpus, shift = 0, n;
-
- cpus = uv_blade_nr_possible_cpus(gru->gs_blade_id);
-
- /* n = cpus rounded up to next power of 2 */
- if (cpus) {
- n = 1 << fls(cpus - 1);
-
- /*
- * shift count for converting local cpu# to TGH index
- * 0 if cpus <= MAX_LOCAL_TGH,
- * 1 if cpus <= 2*MAX_LOCAL_TGH,
- * etc
- */
- shift = max(0, fls(n - 1) - fls(MAX_LOCAL_TGH - 1));
- }
- gru->gs_tgh_local_shift = shift;
-
- /* first starting TGH index to use for remote purges */
- gru->gs_tgh_first_remote = (cpus + (1 << shift) - 1) >> shift;
-
-}
--
2.43.0
^ permalink raw reply related [flat|nested] 8+ messages in thread
* Re: [PATCH 2/2] misc: sgi-gru: Remove SGI GRU driver
2026-07-31 14:37 ` [PATCH 2/2] misc: sgi-gru: Remove SGI GRU driver Dimitri Sivanich
@ 2026-07-31 17:09 ` Muhammad Usama Anjum
2026-07-31 19:16 ` Robin Holt
2026-07-31 20:00 ` Steve Wahl
2 siblings, 0 replies; 8+ messages in thread
From: Muhammad Usama Anjum @ 2026-07-31 17:09 UTC (permalink / raw)
To: Dimitri Sivanich, Greg Kroah-Hartman
Cc: usama.anjum, Steve Wahl, Anderson, Russ, Robin Holt,
Arnd Bergmann, Kees Cook, Russell King, Andrew Morton,
David Hildenbrand (Arm), Lorenzo Stoakes (Oracle), netdev,
linux-kernel
On 31/07/2026 3:37 pm, Dimitri Sivanich wrote:
> Due to security concerns, remove the SGI GRU driver, which cannot be used
> on anything newer than the long time unsupported UV2 platform.
>
> Signed-off-by: Dimitri Sivanich <sivanich@hpe.com>
Acked-by: Muhammad Usama Anjum <usama.anjum@arm.com>
--
Thanks,
Usama
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH 1/2] misc: sgi-xp: Remove SGI XP drivers
2026-07-31 14:30 ` [PATCH 1/2] misc: sgi-xp: Remove SGI XP drivers Dimitri Sivanich
@ 2026-07-31 19:11 ` Robin Holt
2026-07-31 20:00 ` Steve Wahl
1 sibling, 0 replies; 8+ messages in thread
From: Robin Holt @ 2026-07-31 19:11 UTC (permalink / raw)
To: Dimitri Sivanich
Cc: Greg Kroah-Hartman, Steve Wahl, Anderson, Russ, Arnd Bergmann,
Kees Cook, Russell King, Andrew Morton, David Hildenbrand (Arm),
Lorenzo Stoakes (Oracle), Muhammad Usama Anjum, netdev,
linux-kernel
On Fri, Jul 31, 2026 at 9:30 AM Dimitri Sivanich <sivanich@hpe.com> wrote:
>
> Working XP drivers require the GRU driver. The GRU driver is being
> removed, so remove XP as well.
>
> Signed-off-by: Dimitri Sivanich <sivanich@hpe.com>
Acked-by: Robin Holt <robinmholt@gmail.com>
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH 2/2] misc: sgi-gru: Remove SGI GRU driver
2026-07-31 14:37 ` [PATCH 2/2] misc: sgi-gru: Remove SGI GRU driver Dimitri Sivanich
2026-07-31 17:09 ` Muhammad Usama Anjum
@ 2026-07-31 19:16 ` Robin Holt
2026-07-31 20:00 ` Steve Wahl
2 siblings, 0 replies; 8+ messages in thread
From: Robin Holt @ 2026-07-31 19:16 UTC (permalink / raw)
To: Dimitri Sivanich
Cc: Greg Kroah-Hartman, Steve Wahl, Anderson, Russ, Arnd Bergmann,
Kees Cook, Russell King, Andrew Morton, David Hildenbrand (Arm),
Lorenzo Stoakes (Oracle), Muhammad Usama Anjum, netdev,
linux-kernel
On Fri, Jul 31, 2026 at 9:37 AM Dimitri Sivanich <sivanich@hpe.com> wrote:
>
> Due to security concerns, remove the SGI GRU driver, which cannot be used
> on anything newer than the long time unsupported UV2 platform.
>
> Signed-off-by: Dimitri Sivanich <sivanich@hpe.com>
Acked-By: Robin Holt <robinmholt@gmail.com>
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH 1/2] misc: sgi-xp: Remove SGI XP drivers
2026-07-31 14:30 ` [PATCH 1/2] misc: sgi-xp: Remove SGI XP drivers Dimitri Sivanich
2026-07-31 19:11 ` Robin Holt
@ 2026-07-31 20:00 ` Steve Wahl
1 sibling, 0 replies; 8+ messages in thread
From: Steve Wahl @ 2026-07-31 20:00 UTC (permalink / raw)
To: Dimitri Sivanich
Cc: Greg Kroah-Hartman, Steve Wahl, Anderson, Russ, Robin Holt,
Arnd Bergmann, Kees Cook, Russell King, Andrew Morton,
David Hildenbrand (Arm), Lorenzo Stoakes (Oracle),
Muhammad Usama Anjum, netdev, linux-kernel
On Fri, Jul 31, 2026 at 09:30:24AM -0500, Dimitri Sivanich wrote:
> Working XP drivers require the GRU driver. The GRU driver is being
> removed, so remove XP as well.
>
> Signed-off-by: Dimitri Sivanich <sivanich@hpe.com>
Acked-by: Steve Wahl <steve.wahl@hpe.com>
--
Steve Wahl, Hewlett Packard Enterprise
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH 2/2] misc: sgi-gru: Remove SGI GRU driver
2026-07-31 14:37 ` [PATCH 2/2] misc: sgi-gru: Remove SGI GRU driver Dimitri Sivanich
2026-07-31 17:09 ` Muhammad Usama Anjum
2026-07-31 19:16 ` Robin Holt
@ 2026-07-31 20:00 ` Steve Wahl
2 siblings, 0 replies; 8+ messages in thread
From: Steve Wahl @ 2026-07-31 20:00 UTC (permalink / raw)
To: Dimitri Sivanich
Cc: Greg Kroah-Hartman, Steve Wahl, Anderson, Russ, Robin Holt,
Arnd Bergmann, Kees Cook, Russell King, Andrew Morton,
David Hildenbrand (Arm), Lorenzo Stoakes (Oracle),
Muhammad Usama Anjum, netdev, linux-kernel
On Fri, Jul 31, 2026 at 09:37:15AM -0500, Dimitri Sivanich wrote:
> Due to security concerns, remove the SGI GRU driver, which cannot be used
> on anything newer than the long time unsupported UV2 platform.
>
> Signed-off-by: Dimitri Sivanich <sivanich@hpe.com>
Acked-by: Steve Wahl <steve.wahl@hpe.com>
--
Steve Wahl, Hewlett Packard Enterprise
^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2026-07-31 20:01 UTC | newest]
Thread overview: 8+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2026-07-31 14:26 [PATCH 0/2] Remove the sgi-gru and sgi-xp drivers Dimitri Sivanich
2026-07-31 14:30 ` [PATCH 1/2] misc: sgi-xp: Remove SGI XP drivers Dimitri Sivanich
2026-07-31 19:11 ` Robin Holt
2026-07-31 20:00 ` Steve Wahl
2026-07-31 14:37 ` [PATCH 2/2] misc: sgi-gru: Remove SGI GRU driver Dimitri Sivanich
2026-07-31 17:09 ` Muhammad Usama Anjum
2026-07-31 19:16 ` Robin Holt
2026-07-31 20:00 ` Steve Wahl
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