[Patch 3/5] prepare XPC and XPNET for future support of SGIs UV architecture

dcn
2008-03-25T19:27:31Z

[-- Attachment #1: generic-xp --]
[-- Type: text/plain, Size: 202877 bytes --]

Prepared XPC and XPNET for future support of SGI's UV architecture. Made
changes so it compiles on x86_64. Added support for up to 256 partitions.
Cleaned up BTE error conversion for is64 sn2.

Signed-off-by: Dean Nelson <dcn@sgi.com>

---

arch/ia64/sn/kernel/setup.c | 4
drivers/misc/Kconfig | 2
drivers/misc/xp/Makefile | 5
drivers/misc/xp/xp.h | 382 ++++++++++----------
drivers/misc/xp/xp_main.c | 181 ++++++---
drivers/misc/xp/xp_nofault.S | 2
drivers/misc/xp/xp_sn2.c | 487 ++++++++++++++++++++++++++
drivers/misc/xp/xp_uv.c | 194 ++++++++++
drivers/misc/xp/xpc.h | 594 +++++++++++++++----------------
drivers/misc/xp/xpc_channel.c | 357 +++++++++----------
drivers/misc/xp/xpc_main.c | 273 +++++++-------
drivers/misc/xp/xpc_partition.c | 670 +++++++++++++++---------------------
drivers/misc/xp/xpnet.c | 280 ++++++---------
include/asm-ia64/sn/arch.h | 5
include/asm-ia64/sn/bte.h | 5
15 files changed, 2010 insertions(+), 1431 deletions(-)

Index: linux-2.6/drivers/misc/xp/xp.h
===================================================================
--- linux-2.6.orig/drivers/misc/xp/xp.h 2008-03-25 13:47:59.962929996 -0500
+++ linux-2.6/drivers/misc/xp/xp.h 2008-03-25 13:51:08.822447754 -0500
@@ -3,7 +3,7 @@
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * Copyright (C) 2004-2005 Silicon Graphics, Inc. All rights reserved.
+ * Copyright (C) 2004-2008 Silicon Graphics, Inc. All rights reserved.
*/

@@ -12,15 +12,28 @@
*/

-#ifndef _ASM_IA64_SN_XP_H
-#define _ASM_IA64_SN_XP_H
+#ifndef _DRIVERS_MISC_XP_XP_H
+#define _DRIVERS_MISC_XP_XP_H

#include <linux/cache.h>
#include <linux/hardirq.h>
#include <linux/mutex.h>
-#include <asm/sn/types.h>
-#include <asm/sn/bte.h>
+#ifdef CONFIG_IA64
+#include <asm/sn/arch.h>
+#endif
+
+/* >>> Add these two #defines to some linux header file some day. */
+#define BYTES_PER_WORD sizeof(void *)
+#define BITS_PER_WORD (BYTES_PER_WORD * BITS_PER_BYTE)
+
+#if defined(CONFIG_IA64)
+#define U64_ELL "l"
+#elif defined(CONFIG_X86_64)
+#define U64_ELL "ll"
+#else
+#error architecture is NOT supported
+#endif

#ifdef USE_DBUG_ON
@@ -30,6 +43,23 @@
#endif

+#ifndef is_shub1
+#define is_shub1() 0
+#endif
+
+#ifndef is_shub2
+#define is_shub2() 0
+#endif
+
+#ifndef is_shub
+#define is_shub() 0
+#endif
+
+#ifndef is_uv
+#define is_uv() 0
+#endif
+
+
/*
* Define the maximum number of logically defined partitions the system
* can support. It is constrained by the maximum number of hardware
@@ -41,60 +71,15 @@
* maximum number of nodes in the entire system divided by the minimum number
* of nodes that comprise an access protection grouping.
*/
-#define XP_MAX_PARTITIONS 64
-
-
-/*
- * Define the number of u64s required to represent all the C-brick nasids
- * as a bitmap. The cross-partition kernel modules deal only with
- * C-brick nasids, thus the need for bitmaps which don't account for
- * odd-numbered (non C-brick) nasids.
- */
-#define XP_MAX_PHYSNODE_ID (MAX_NUMALINK_NODES / 2)
-#define XP_NASID_MASK_BYTES ((XP_MAX_PHYSNODE_ID + 7) / 8)
-#define XP_NASID_MASK_WORDS ((XP_MAX_PHYSNODE_ID + 63) / 64)
-
+#define XP_NPARTITIONS 64 /* #of partitions allowed */
+#define XP_MAX_NPARTITIONS 256 /* max #of partitions possible */

-/*
- * Wrapper for bte_copy() that should it return a failure status will retry
- * the bte_copy() once in the hope that the failure was due to a temporary
- * aberration (i.e., the link going down temporarily).
- *
- * src - physical address of the source of the transfer.
- * vdst - virtual address of the destination of the transfer.
- * len - number of bytes to transfer from source to destination.
- * mode - see bte_copy() for definition.
- * notification - see bte_copy() for definition.
- *
- * Note: xp_bte_copy() should never be called while holding a spinlock.
- */
-static inline bte_result_t
-xp_bte_copy(u64 src, u64 vdst, u64 len, u64 mode, void *notification)
-{
- bte_result_t ret;
- u64 pdst = ia64_tpa(vdst);
-
-
- /*
- * Ensure that the physically mapped memory is contiguous.
- *
- * We do this by ensuring that the memory is from region 7 only.
- * If the need should arise to use memory from one of the other
- * regions, then modify the BUG_ON() statement to ensure that the
- * memory from that region is always physically contiguous.
- */
- BUG_ON(REGION_NUMBER(vdst) != RGN_KERNEL);
-
- ret = bte_copy(src, pdst, len, mode, notification);
- if ((ret != BTE_SUCCESS) && BTE_ERROR_RETRY(ret)) {
- if (!in_interrupt()) {
- cond_resched();
- }
- ret = bte_copy(src, pdst, len, mode, notification);
- }
+#if XP_NPARTITIONS > XP_MAX_NPARTITIONS
+#error XP_NPARTITIONS exceeds MAXIMUM possible.
+#endif

- return ret;
-}
+#define XP_MIN_PARTID 1 /* inclusive */
+#define XP_MAX_PARTID (XP_NPARTITIONS - 1) /* inclusive */

/*
@@ -115,11 +100,11 @@ xp_bte_copy(u64 src, u64 vdst, u64 len,
#define XPC_MEM_CHANNEL 0 /* memory channel number */
#define XPC_NET_CHANNEL 1 /* network channel number */

-#define XPC_NCHANNELS 2 /* #of defined channels */
-#define XPC_MAX_NCHANNELS 8 /* max #of channels allowed */
+#define XPC_NCHANNELS 2 /* #of channels allowed */
+#define XPC_MAX_NCHANNELS 8 /* max #of channels possible */

#if XPC_NCHANNELS > XPC_MAX_NCHANNELS
-#error XPC_NCHANNELS exceeds MAXIMUM allowed.
+#error XPC_NCHANNELS exceeds MAXIMUM possible.
#endif

@@ -169,106 +154,103 @@ struct xpc_msg {
/*
* 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
- * xpcUnknownReason, which must have the highest numerical value.)
+ * xpUnknownReason, which must have the highest numerical value.)
*/
-enum xpc_retval {
- xpcSuccess = 0,
-
- xpcNotConnected, /* 1: channel is not connected */
- xpcConnected, /* 2: channel connected (opened) */
- xpcRETIRED1, /* 3: (formerly xpcDisconnected) */
-
- xpcMsgReceived, /* 4: message received */
- xpcMsgDelivered, /* 5: message delivered and acknowledged */
-
- xpcRETIRED2, /* 6: (formerly xpcTransferFailed) */
-
- xpcNoWait, /* 7: operation would require wait */
- xpcRetry, /* 8: retry operation */
- xpcTimeout, /* 9: timeout in xpc_allocate_msg_wait() */
- xpcInterrupted, /* 10: interrupted wait */
-
- xpcUnequalMsgSizes, /* 11: message size disparity between sides */
- xpcInvalidAddress, /* 12: invalid address */
+enum xp_retval {
+ xpSuccess = 0,

- xpcNoMemory, /* 13: no memory available for XPC structures */
- xpcLackOfResources, /* 14: insufficient resources for operation */
- xpcUnregistered, /* 15: channel is not registered */
- xpcAlreadyRegistered, /* 16: channel is already registered */
+ xpNotConnected, /* 1: channel is not connected */
+ xpConnected, /* 2: channel connected (opened) */
+ xpRETIRED1, /* 3: (formerly xpDisconnected) */

- xpcPartitionDown, /* 17: remote partition is down */
- xpcNotLoaded, /* 18: XPC module is not loaded */
- xpcUnloading, /* 19: this side is unloading XPC module */
+ xpMsgReceived, /* 4: message received */
+ xpMsgDelivered, /* 5: message delivered and acknowledged */

- xpcBadMagic, /* 20: XPC MAGIC string not found */
+ xpRETIRED2, /* 6: (formerly xpTransferFailed) */

- xpcReactivating, /* 21: remote partition was reactivated */
+ xpNoWait, /* 7: operation would require wait */
+ xpRetry, /* 8: retry operation */
+ xpTimeout, /* 9: timeout in xpc_allocate_msg_wait() */
+ xpInterrupted, /* 10: interrupted wait */

- xpcUnregistering, /* 22: this side is unregistering channel */
- xpcOtherUnregistering, /* 23: other side is unregistering channel */
+ xpUnequalMsgSizes, /* 11: message size disparity between sides */
+ xpInvalidAddress, /* 12: invalid address */

- xpcCloneKThread, /* 24: cloning kernel thread */
- xpcCloneKThreadFailed, /* 25: cloning kernel thread failed */
+ 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 */

- xpcNoHeartbeat, /* 26: remote partition has no heartbeat */
+ xpPartitionDown, /* 17: remote partition is down */
+ xpNotLoaded, /* 18: XPC module is not loaded */
+ xpUnloading, /* 19: this side is unloading XPC module */

- xpcPioReadError, /* 27: PIO read error */
- xpcPhysAddrRegFailed, /* 28: registration of phys addr range failed */
+ xpBadMagic, /* 20: XPC MAGIC string not found */

- xpcBteDirectoryError, /* 29: maps to BTEFAIL_DIR */
- xpcBtePoisonError, /* 30: maps to BTEFAIL_POISON */
- xpcBteWriteError, /* 31: maps to BTEFAIL_WERR */
- xpcBteAccessError, /* 32: maps to BTEFAIL_ACCESS */
- xpcBtePWriteError, /* 33: maps to BTEFAIL_PWERR */
- xpcBtePReadError, /* 34: maps to BTEFAIL_PRERR */
- xpcBteTimeOutError, /* 35: maps to BTEFAIL_TOUT */
- xpcBteXtalkError, /* 36: maps to BTEFAIL_XTERR */
- xpcBteNotAvailable, /* 37: maps to BTEFAIL_NOTAVAIL */
- xpcBteUnmappedError, /* 38: unmapped BTEFAIL_ error */
+ xpReactivating, /* 21: remote partition was reactivated */

- xpcBadVersion, /* 39: bad version number */
- xpcVarsNotSet, /* 40: the XPC variables are not set up */
- xpcNoRsvdPageAddr, /* 41: unable to get rsvd page's phys addr */
- xpcInvalidPartid, /* 42: invalid partition ID */
- xpcLocalPartid, /* 43: local partition ID */
+ xpUnregistering, /* 22: this side is unregistering channel */
+ xpOtherUnregistering, /* 23: other side is unregistering channel */

- xpcOtherGoingDown, /* 44: other side going down, reason unknown */
- xpcSystemGoingDown, /* 45: system is going down, reason unknown */
- xpcSystemHalt, /* 46: system is being halted */
- xpcSystemReboot, /* 47: system is being rebooted */
- xpcSystemPoweroff, /* 48: system is being powered off */
+ xpCloneKThread, /* 24: cloning kernel thread */
+ xpCloneKThreadFailed, /* 25: cloning kernel thread failed */

- xpcDisconnecting, /* 49: channel disconnecting (closing) */
+ xpNoHeartbeat, /* 26: remote partition has no heartbeat */

- xpcOpenCloseError, /* 50: channel open/close protocol error */
+ xpPioReadError, /* 27: PIO read error */
+ xpPhysAddrRegFailed, /* 28: registration of phys addr range failed */

- xpcDisconnected, /* 51: channel disconnected (closed) */
+ 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) */

- xpcBteSh2Start, /* 52: BTE CRB timeout */
+ 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 */

- /* 53: 0x1 BTE Error Response Short */
- xpcBteSh2RspShort = xpcBteSh2Start + BTEFAIL_SH2_RESP_SHORT,
+ 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 */

- /* 54: 0x2 BTE Error Response Long */
- xpcBteSh2RspLong = xpcBteSh2Start + BTEFAIL_SH2_RESP_LONG,
+ xpDisconnecting, /* 49: channel disconnecting (closing) */

- /* 56: 0x4 BTE Error Response DSB */
- xpcBteSh2RspDSB = xpcBteSh2Start + BTEFAIL_SH2_RESP_DSP,
+ xpOpenCloseError, /* 50: channel open/close protocol error */

- /* 60: 0x8 BTE Error Response Access */
- xpcBteSh2RspAccess = xpcBteSh2Start + BTEFAIL_SH2_RESP_ACCESS,
+ xpDisconnected, /* 51: channel disconnected (closed) */

- /* 68: 0x10 BTE Error CRB timeout */
- xpcBteSh2CRBTO = xpcBteSh2Start + BTEFAIL_SH2_CRB_TO,
+ xpBteCopyError, /* 52: bte_copy() returned error */
+ xpSalError, /* 53: sn SAL error */
+ xpNeedMoreInfo, /* 54: more info is needed by SAL */

- /* 84: 0x20 BTE Error NACK limit */
- xpcBteSh2NACKLimit = xpcBteSh2Start + BTEFAIL_SH2_NACK_LIMIT,
+ xpUnsupported, /* 55: unsupported functionality or resource */
+ xpUnknownReason /* 56: unknown reason (must be last in list) */
+};

- /* 115: BTE end */
- xpcBteSh2End = xpcBteSh2Start + BTEFAIL_SH2_ALL,

- xpcUnknownReason /* 116: unknown reason -- must be last in list */
-};
+/* the following are valid xp_set_amo() ops */
+#define XP_AMO_OR 1 /* set variable to (variable | operand) */
+#define XP_AMO_AND 2 /* set variable to (variable & operand) */
+
+/* the following are valid xp_get_amo() ops */
+#define XP_AMO_LOAD 1 /* get variable contents */
+#define XP_AMO_CLEAR 2 /* get variable contents and clear variable */
+
+/* the following are valid xp_change_memprotect() ops */
+#define XP_MEMPROT_DISALLOW_ALL 0
+#define XP_MEMPROT_ALLOW_CPU_AMO 1
+#define XP_MEMPROT_ALLOW_CPU_MEM 2
+#define XP_MEMPROT_ALLOW_ALL 3 /* Shub 1.1 only */

/*
@@ -302,83 +284,83 @@ enum xpc_retval {
*
* Reason Code | Cause | Optional Data
* =====================+================================+=====================
- * xpcConnected | connection has been established| max #of entries
+ * xpConnected | connection has been established| max #of entries
* | to the specified partition on | allowed in message
* | the specified channel | queue
* ---------------------+--------------------------------+---------------------
- * xpcMsgReceived | an XPC message arrived from | address of payload
+ * xpMsgReceived | an XPC message arrived from | address of payload
* | the specified partition on the |
* | specified channel | [the user must call
* | | xpc_received() when
* | | finished with the
* | | payload]
* ---------------------+--------------------------------+---------------------
- * xpcMsgDelivered | notification that the message | NA
+ * xpMsgDelivered | notification that the message | NA
* | was delivered to the intended |
* | recipient and that they have |
* | acknowledged its receipt by |
* | calling xpc_received() |
* =====================+================================+=====================
- * xpcUnequalMsgSizes | can't connect to the specified | NULL
+ * xpUnequalMsgSizes | can't connect to the specified | NULL
* | partition on the specified |
* | channel because of mismatched |
* | message sizes |
* ---------------------+--------------------------------+---------------------
- * xpcNoMemory | insufficient memory avaiable | NULL
+ * xpNoMemory | insufficient memory avaiable | NULL
* | to allocate message queue |
* ---------------------+--------------------------------+---------------------
- * xpcLackOfResources | lack of resources to create | NULL
+ * xpLackOfResources | lack of resources to create | NULL
* | the necessary kthreads to |
* | support the channel |
* ---------------------+--------------------------------+---------------------
- * xpcUnregistering | this side's user has | NULL or NA
+ * xpUnregistering | this side's user has | NULL or NA
* | unregistered by calling |
* | xpc_disconnect() |
* ---------------------+--------------------------------+---------------------
- * xpcOtherUnregistering| the other side's user has | NULL or NA
+ * xpOtherUnregistering | the other side's user has | NULL or NA
* | unregistered by calling |
* | xpc_disconnect() |
* ---------------------+--------------------------------+---------------------
- * xpcNoHeartbeat | the other side's XPC is no | NULL or NA
+ * xpNoHeartbeat | the other side's XPC is no | NULL or NA
* | longer heartbeating |
* | |
* ---------------------+--------------------------------+---------------------
- * xpcUnloading | this side's XPC module is | NULL or NA
+ * xpUnloading | this side's XPC module is | NULL or NA
* | being unloaded |
* | |
* ---------------------+--------------------------------+---------------------
- * xpcOtherUnloading | the other side's XPC module is | NULL or NA
+ * xpOtherUnloading | the other side's XPC module is | NULL or NA
* | is being unloaded |
* | |
* ---------------------+--------------------------------+---------------------
- * xpcPioReadError | xp_nofault_PIOR() returned an | NULL or NA
+ * xpPioReadError | xp_nofault_PIOR() returned an | NULL or NA
* | error while sending an IPI |
* | |
* ---------------------+--------------------------------+---------------------
- * xpcInvalidAddress | the address either received or | NULL or NA
+ * xpInvalidAddress | the address either received or | NULL or NA
* | sent by the specified partition|
* | is invalid |
* ---------------------+--------------------------------+---------------------
- * xpcBteNotAvailable | attempt to pull data from the | NULL or NA
- * xpcBtePoisonError | specified partition over the |
- * xpcBteWriteError | specified channel via a |
- * xpcBteAccessError | bte_copy() failed |
- * xpcBteTimeOutError | |
- * xpcBteXtalkError | |
- * xpcBteDirectoryError | |
- * xpcBteGenericError | |
- * xpcBteUnmappedError | |
+ * xpBteNotAvailable | attempt to pull data from the | NULL or NA
+ * xpBtePoisonError | specified partition over the |
+ * xpBteWriteError | specified channel via a |
+ * xpBteAccessError | bte_copy() failed |
+ * xpBteTimeOutError | |
+ * xpBteXtalkError | |
+ * xpBteDirectoryError | |
+ * xpBteGenericError | |
+ * xpBteUnmappedError | |
* ---------------------+--------------------------------+---------------------
- * xpcUnknownReason | the specified channel to the | NULL or NA
+ * xpUnknownReason | the specified channel to the | NULL or NA
* | specified partition was |
* | unavailable for unknown reasons|
* =====================+================================+=====================
*/

-typedef void (*xpc_channel_func)(enum xpc_retval reason, partid_t partid,
+typedef void (*xpc_channel_func)(enum xp_retval reason, short partid,
int ch_number, void *data, void *key);

-typedef void (*xpc_notify_func)(enum xpc_retval reason, partid_t partid,
+typedef void (*xpc_notify_func)(enum xp_retval reason, short partid,
int ch_number, void *key);

@@ -418,12 +400,12 @@ struct xpc_registration {
struct xpc_interface {
void (*connect)(int);
void (*disconnect)(int);
- enum xpc_retval (*allocate)(partid_t, int, u32, void **);
- enum xpc_retval (*send)(partid_t, int, void *);
- enum xpc_retval (*send_notify)(partid_t, int, void *,
+ enum xp_retval (*allocate)(short, int, u32, void **);
+ enum xp_retval (*send)(short, int, void *);
+ enum xp_retval (*send_notify)(short, int, void *,
xpc_notify_func, void *);
- void (*received)(partid_t, int, void *);
- enum xpc_retval (*partid_to_nasids)(partid_t, void *);
+ void (*received)(short, int, void *);
+ enum xp_retval (*partid_to_nasids)(short, void *);
};

@@ -431,55 +413,91 @@ extern struct xpc_interface xpc_interfac

extern void xpc_set_interface(void (*)(int),
void (*)(int),
- enum xpc_retval (*)(partid_t, int, u32, void **),
- enum xpc_retval (*)(partid_t, int, void *),
- enum xpc_retval (*)(partid_t, int, void *, xpc_notify_func,
+ enum xp_retval (*)(short, int, u32, void **),
+ enum xp_retval (*)(short, int, void *),
+ enum xp_retval (*)(short, int, void *, xpc_notify_func,
void *),
- void (*)(partid_t, int, void *),
- enum xpc_retval (*)(partid_t, void *));
+ void (*)(short, int, void *),
+ enum xp_retval (*)(short, void *));
extern void xpc_clear_interface(void);

-extern enum xpc_retval xpc_connect(int, xpc_channel_func, void *, u16,
+extern enum xp_retval xpc_connect(int, xpc_channel_func, void *, u16,
u16, u32, u32);
extern void xpc_disconnect(int);

-static inline enum xpc_retval
-xpc_allocate(partid_t partid, int ch_number, u32 flags, void **payload)
+static inline enum xp_retval
+xpc_allocate(short partid, int ch_number, u32 flags, void **payload)
{
return xpc_interface.allocate(partid, ch_number, flags, payload);
}

-static inline enum xpc_retval
-xpc_send(partid_t partid, int ch_number, void *payload)
+static inline enum xp_retval
+xpc_send(short partid, int ch_number, void *payload)
{
return xpc_interface.send(partid, ch_number, payload);
}

-static inline enum xpc_retval
-xpc_send_notify(partid_t partid, int ch_number, void *payload,
+static inline enum xp_retval
+xpc_send_notify(short partid, int ch_number, void *payload,
xpc_notify_func func, void *key)
{
return xpc_interface.send_notify(partid, ch_number, payload, func, key);
}

static inline void
-xpc_received(partid_t partid, int ch_number, void *payload)
+xpc_received(short partid, int ch_number, void *payload)
{
return xpc_interface.received(partid, ch_number, payload);
}

-static inline enum xpc_retval
-xpc_partid_to_nasids(partid_t partid, void *nasids)
+static inline enum xp_retval
+xpc_partid_to_nasids(short partid, void *nasids)
{
return xpc_interface.partid_to_nasids(partid, nasids);
}

+extern short xp_partition_id;
+extern u8 xp_region_size;
+extern unsigned long xp_rtc_cycles_per_second;
+extern enum xp_retval (*xp_remote_memcpy)(void *, const void *, size_t);
+extern enum xp_retval (*xp_register_remote_amos)(u64, size_t);
+extern enum xp_retval (*xp_unregister_remote_amos)(u64, size_t);
+extern int xp_sizeof_nasid_mask;
+extern int xp_sizeof_amo;
+extern u64 *(*xp_alloc_amos)(int);
+extern void (*xp_free_amos)(u64 *, int);
+extern enum xp_retval (*xp_set_amo)(u64 *, int, u64, int);
+extern enum xp_retval (*xp_set_amo_with_interrupt)(u64 *, int, u64, int, int,
+ int, int);
+extern enum xp_retval (*xp_get_amo)(u64 *, int, u64 *);
+extern enum xp_retval (*xp_get_partition_rsvd_page_pa)(u64, u64 *, u64 *,
+ size_t *);
+extern enum xp_retval (*xp_change_memprotect)(u64, size_t, int, u64 *);
+extern void (*xp_change_memprotect_shub_wars_1_1)(int);
+extern void (*xp_allow_IPI_ops)(void);
+extern void (*xp_disallow_IPI_ops)(void);
+
+extern int (*xp_cpu_to_nasid)(int);
+extern int (*xp_node_to_nasid)(int);

extern u64 xp_nofault_PIOR_target;
extern int xp_nofault_PIOR(void *);
extern int xp_error_PIOR(void);

-#endif /* _ASM_IA64_SN_XP_H */
+static inline int
+xp_partid_mask_words(int npartitions)
+{
+ return DIV_ROUND_UP(npartitions, BITS_PER_WORD);
+}
+
+static inline int
+xp_nasid_mask_words(void)
+{
+ return DIV_ROUND_UP(xp_sizeof_nasid_mask, BYTES_PER_WORD);
+}
+
+
+#endif /* _DRIVERS_MISC_XP_XP_H */

Index: linux-2.6/drivers/misc/xp/xp_main.c
===================================================================
--- linux-2.6.orig/drivers/misc/xp/xp_main.c 2008-03-25 13:47:59.962929996 -0500
+++ linux-2.6/drivers/misc/xp/xp_main.c 2008-03-25 13:51:08.838449746 -0500
@@ -3,7 +3,7 @@
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * Copyright (c) 2004-2005 Silicon Graphics, Inc. All Rights Reserved.
+ * Copyright (c) 2004-2008 Silicon Graphics, Inc. All Rights Reserved.
*/

@@ -17,41 +17,77 @@

#include <linux/kernel.h>
-#include <linux/interrupt.h>
#include <linux/module.h>
-#include <linux/mutex.h>
-#include <asm/sn/intr.h>
-#include <asm/sn/sn_sal.h>
-#include <asm/sn/xp.h>
+#include <linux/device.h>
+#include "xp.h"

+/* Define the XP debug device structures to be used with dev_dbg() et al */
+
+struct device_driver xp_dbg_name = {
+ .name = "xp"
+};
+
+struct device xp_dbg_subname = {
+ .bus_id = {0}, /* set to "" */
+ .driver = &xp_dbg_name
+};
+
+struct device *xp = &xp_dbg_subname;

/*
* Target of nofault PIO read.
*/
u64 xp_nofault_PIOR_target;

+short xp_partition_id;
+u8 xp_region_size;
+unsigned long xp_rtc_cycles_per_second;

-/*
- * xpc_registrations[] keeps track of xpc_connect()'s done by the kernel-level
- * users of XPC.
- */
-struct xpc_registration xpc_registrations[XPC_NCHANNELS];
+enum xp_retval (*xp_remote_memcpy)(void *dst, const void *src, size_t len);
+
+enum xp_retval (*xp_register_remote_amos)(u64 paddr, size_t len);
+enum xp_retval (*xp_unregister_remote_amos)(u64 paddr, size_t len);
+
+int xp_sizeof_nasid_mask;
+int xp_sizeof_amo;
+
+u64 *(*xp_alloc_amos)(int n_amos);
+void (*xp_free_amos)(u64 *amos_page, int n_amos);
+
+enum xp_retval (*xp_set_amo)(u64 *amo_va, int op, u64 operand, int remote);
+enum xp_retval (*xp_set_amo_with_interrupt)(u64 *amo_va, int op, u64 operand,
+ int remote, int nasid,
+ int phys_cpuid, int vector);
+
+enum xp_retval (*xp_get_amo)(u64 *amo_va, int op, u64 *amo_value_addr);
+
+enum xp_retval (*xp_get_partition_rsvd_page_pa)(u64 buf, u64 *cookie,
+ u64 *paddr, size_t *len);
+
+enum xp_retval (*xp_change_memprotect)(u64 paddr, size_t len, int request,
+ u64 *nasid_array);
+void (*xp_change_memprotect_shub_wars_1_1)(int request);
+void (*xp_allow_IPI_ops)(void);
+void (*xp_disallow_IPI_ops)(void);
+
+int (*xp_cpu_to_nasid)(int cpuid);
+int (*xp_node_to_nasid)(int nid);

/*
* Initialize the XPC interface to indicate that XPC isn't loaded.
*/
-static enum xpc_retval xpc_notloaded(void) { return xpcNotLoaded; }
+static enum xp_retval xpc_notloaded(void) { return xpNotLoaded; }

struct xpc_interface xpc_interface = {
(void (*)(int)) xpc_notloaded,
(void (*)(int)) xpc_notloaded,
- (enum xpc_retval (*)(partid_t, int, u32, void **)) xpc_notloaded,
- (enum xpc_retval (*)(partid_t, int, void *)) xpc_notloaded,
- (enum xpc_retval (*)(partid_t, int, void *, xpc_notify_func, void *))
+ (enum xp_retval (*)(short, int, u32, void **)) xpc_notloaded,
+ (enum xp_retval (*)(short, int, void *)) xpc_notloaded,
+ (enum xp_retval (*)(short, int, void *, xpc_notify_func, void *))
xpc_notloaded,
- (void (*)(partid_t, int, void *)) xpc_notloaded,
- (enum xpc_retval (*)(partid_t, void *)) xpc_notloaded
+ (void (*)(short, int, void *)) xpc_notloaded,
+ (enum xp_retval (*)(short, void *)) xpc_notloaded
};

@@ -61,12 +97,12 @@ struct xpc_interface xpc_interface = {
void
xpc_set_interface(void (*connect)(int),
void (*disconnect)(int),
- enum xpc_retval (*allocate)(partid_t, int, u32, void **),
- enum xpc_retval (*send)(partid_t, int, void *),
- enum xpc_retval (*send_notify)(partid_t, int, void *,
+ enum xp_retval (*allocate)(short, int, u32, void **),
+ enum xp_retval (*send)(short, int, void *),
+ enum xp_retval (*send_notify)(short, int, void *,
xpc_notify_func, void *),
- void (*received)(partid_t, int, void *),
- enum xpc_retval (*partid_to_nasids)(partid_t, void *))
+ void (*received)(short, int, void *),
+ enum xp_retval (*partid_to_nasids)(short, void *))
{
xpc_interface.connect = connect;
xpc_interface.disconnect = disconnect;
@@ -86,20 +122,27 @@ xpc_clear_interface(void)
{
xpc_interface.connect = (void (*)(int)) xpc_notloaded;
xpc_interface.disconnect = (void (*)(int)) xpc_notloaded;
- xpc_interface.allocate = (enum xpc_retval (*)(partid_t, int, u32,
+ xpc_interface.allocate = (enum xp_retval (*)(short, int, u32,
void **)) xpc_notloaded;
- xpc_interface.send = (enum xpc_retval (*)(partid_t, int, void *))
+ xpc_interface.send = (enum xp_retval (*)(short, int, void *))
xpc_notloaded;
- xpc_interface.send_notify = (enum xpc_retval (*)(partid_t, int, void *,
+ xpc_interface.send_notify = (enum xp_retval (*)(short, int, void *,
xpc_notify_func, void *)) xpc_notloaded;
- xpc_interface.received = (void (*)(partid_t, int, void *))
+ xpc_interface.received = (void (*)(short, int, void *))
xpc_notloaded;
- xpc_interface.partid_to_nasids = (enum xpc_retval (*)(partid_t, void *))
+ xpc_interface.partid_to_nasids = (enum xp_retval (*)(short, void *))
xpc_notloaded;
}

/*
+ * xpc_registrations[] keeps track of xpc_connect()'s done by the kernel-level
+ * users of XPC.
+ */
+struct xpc_registration xpc_registrations[XPC_NCHANNELS];
+
+
+/*
* Register for automatic establishment of a channel connection whenever
* a partition comes up.
*
@@ -117,13 +160,13 @@ xpc_clear_interface(void)
* 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 xpcConnected callout.
+ * 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 xpc_retval
+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)
{
@@ -138,13 +181,13 @@ xpc_connect(int ch_number, xpc_channel_f
registration = &xpc_registrations[ch_number];

if (mutex_lock_interruptible(&registration->mutex) != 0) {
- return xpcInterrupted;
+ return xpInterrupted;
}

/* if XPC_CHANNEL_REGISTERED(ch_number) */
if (registration->func != NULL) {
mutex_unlock(&registration->mutex);
- return xpcAlreadyRegistered;
+ return xpAlreadyRegistered;
}

/* register the channel for connection */
@@ -159,7 +202,7 @@ xpc_connect(int ch_number, xpc_channel_f

xpc_interface.connect(ch_number);

- return xpcSuccess;
+ return xpSuccess;
}

@@ -214,43 +257,26 @@ xpc_disconnect(int ch_number)
return;
}

+extern enum xp_retval xp_init_sn2(void);
+extern enum xp_retval xp_init_uv(void);

int __init
xp_init(void)
{
- int ret, ch_number;
- u64 func_addr = *(u64 *) xp_nofault_PIOR;
- u64 err_func_addr = *(u64 *) xp_error_PIOR;
+ enum xp_retval ret;
+ int ch_number;

+ if (is_shub())
+ ret = xp_init_sn2();
+ else if (is_uv())
+ ret = xp_init_uv();
+ else
+ ret = xpUnsupported;

- if (!ia64_platform_is("sn2")) {
+ if (ret != xpSuccess) {
return -ENODEV;
}

- /*
- * Register a nofault code region which performs a cross-partition
- * PIO read. If the PIO read times out, the MCA handler will consume
- * the error and return to a kernel-provided instruction to indicate
- * an error. This PIO read exists because it is guaranteed to timeout
- * if the destination is down (AMO operations do not timeout on at
- * least some CPUs on Shubs <= v1.2, which unfortunately we have to
- * work around).
- */
- if ((ret = sn_register_nofault_code(func_addr, err_func_addr,
- err_func_addr, 1, 1)) != 0) {
- printk(KERN_ERR "XP: can't register nofault code, error=%d\n",
- ret);
- }
- /*
- * Setup the nofault PIO read target. (There is no special reason why
- * SH_IPI_ACCESS was selected.)
- */
- if (is_shub2()) {
- xp_nofault_PIOR_target = SH2_IPI_ACCESS0;
- } else {
- xp_nofault_PIOR_target = SH1_IPI_ACCESS;
- }
-
/* initialize the connection registration mutex */
for (ch_number = 0; ch_number < XPC_NCHANNELS; ch_number++) {
mutex_init(&xpc_registrations[ch_number].mutex);
@@ -260,17 +286,16 @@ xp_init(void)
}
module_init(xp_init);

+extern void xp_exit_sn2(void);
+extern void xp_exit_uv(void);

void __exit
xp_exit(void)
{
- u64 func_addr = *(u64 *) xp_nofault_PIOR;
- u64 err_func_addr = *(u64 *) xp_error_PIOR;
-
-
- /* unregister the PIO read nofault code region */
- (void) sn_register_nofault_code(func_addr, err_func_addr,
- err_func_addr, 1, 0);
+ if (is_shub())
+ xp_exit_sn2();
+ else if (is_uv())
+ xp_exit_uv();
}
module_exit(xp_exit);

@@ -279,8 +304,26 @@ MODULE_AUTHOR("Silicon Graphics, Inc.");
MODULE_DESCRIPTION("Cross Partition (XP) base");
MODULE_LICENSE("GPL");

-EXPORT_SYMBOL(xp_nofault_PIOR);
-EXPORT_SYMBOL(xp_nofault_PIOR_target);
+EXPORT_SYMBOL(xp_partition_id);
+EXPORT_SYMBOL(xp_region_size);
+EXPORT_SYMBOL(xp_rtc_cycles_per_second);
+EXPORT_SYMBOL(xp_remote_memcpy);
+EXPORT_SYMBOL(xp_register_remote_amos);
+EXPORT_SYMBOL(xp_unregister_remote_amos);
+EXPORT_SYMBOL(xp_sizeof_nasid_mask);
+EXPORT_SYMBOL(xp_sizeof_amo);
+EXPORT_SYMBOL(xp_alloc_amos);
+EXPORT_SYMBOL(xp_free_amos);
+EXPORT_SYMBOL(xp_set_amo);
+EXPORT_SYMBOL(xp_set_amo_with_interrupt);
+EXPORT_SYMBOL(xp_get_amo);
+EXPORT_SYMBOL(xp_get_partition_rsvd_page_pa);
+EXPORT_SYMBOL(xp_change_memprotect);
+EXPORT_SYMBOL(xp_change_memprotect_shub_wars_1_1);
+EXPORT_SYMBOL(xp_allow_IPI_ops);
+EXPORT_SYMBOL(xp_disallow_IPI_ops);
+EXPORT_SYMBOL(xp_cpu_to_nasid);
+EXPORT_SYMBOL(xp_node_to_nasid);
EXPORT_SYMBOL(xpc_registrations);
EXPORT_SYMBOL(xpc_interface);
EXPORT_SYMBOL(xpc_clear_interface);
Index: linux-2.6/drivers/misc/xp/xpc.h
===================================================================
--- linux-2.6.orig/drivers/misc/xp/xpc.h 2008-03-25 13:47:59.962929996 -0500
+++ linux-2.6/drivers/misc/xp/xpc.h 2008-03-25 13:51:08.858452237 -0500
@@ -3,7 +3,7 @@
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * Copyright (c) 2004-2007 Silicon Graphics, Inc. All Rights Reserved.
+ * Copyright (c) 2004-2008 Silicon Graphics, Inc. All Rights Reserved.
*/

@@ -11,8 +11,8 @@
* Cross Partition Communication (XPC) structures and macros.
*/

-#ifndef _ASM_IA64_SN_XPC_H
-#define _ASM_IA64_SN_XPC_H
+#ifndef _DRIVERS_MISC_XP_XPC_H
+#define _DRIVERS_MISC_XP_XPC_H

#include <linux/interrupt.h>
@@ -22,12 +22,15 @@
#include <linux/completion.h>
#include <asm/pgtable.h>
#include <asm/processor.h>
-#include <asm/sn/bte.h>
-#include <asm/sn/clksupport.h>
-#include <asm/sn/addrs.h>
-#include <asm/sn/mspec.h>
-#include <asm/sn/shub_mmr.h>
-#include <asm/sn/xp.h>
+#if defined(CONFIG_IA64)
+#include <asm/sn/intr.h>
+#elif defined(CONFIG_X86_64)
+#define SGI_XPC_ACTIVATE 0x30
+#define SGI_XPC_NOTIFY 0xe7
+#else
+#error architecture is NOT supported
+#endif
+#include "xp.h"

/*
@@ -43,7 +46,7 @@
/*
* The next macros define word or bit representations for given
* C-brick nasid in either the SAL provided bit array representing
- * nasids in the partition/machine or the AMO_t array used for
+ * nasids in the partition/machine or the array of AMO variables used for
* inter-partition initiation communications.
*
* For SN2 machines, C-Bricks are alway even numbered NASIDs. As
@@ -51,11 +54,7 @@
* passed from SAL always be packed for C-Bricks and the
* cross-partition interrupts use the same packing scheme.
*/
-#define XPC_NASID_W_INDEX(_n) (((_n) / 64) / 2)
-#define XPC_NASID_B_INDEX(_n) (((_n) / 2) & (64 - 1))
-#define XPC_NASID_IN_ARRAY(_n, _p) ((_p)[XPC_NASID_W_INDEX(_n)] & \
- (1UL << XPC_NASID_B_INDEX(_n)))
-#define XPC_NASID_FROM_W_B(_w, _b) (((_w) * 64 + (_b)) * 2)
+#define XPC_NASID_IN_ARRAY(_n, _p) ((_p)[BIT_WORD((_n)/2)] & BIT_MASK((_n)/2))

#define XPC_HB_DEFAULT_INTERVAL 5 /* incr HB every x secs */
#define XPC_HB_CHECK_DEFAULT_INTERVAL 20 /* check HB every x secs */
@@ -80,8 +79,8 @@
* The first cacheline of the reserved page contains 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, partid, and nasids_size. The other
- * fields are set up by XPC. (xpc_rsvd_page points to the local
+ * 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
@@ -112,16 +111,16 @@
struct xpc_rsvd_page {
u64 SAL_signature; /* SAL: unique signature */
u64 SAL_version; /* SAL: version */
- u8 partid; /* SAL: partition ID */
+ u8 SAL_partid; /* SAL: partition ID */
u8 version;
- u8 pad1[6]; /* align to next u64 in cacheline */
- volatile u64 vars_pa;
+ u8 pad[6];
+ volatile u64 vars_pa; /* physical address of struct xpc_vars */
struct timespec stamp; /* time when reserved page was setup by XPC */
u64 pad2[9]; /* align to last u64 in cacheline */
- u64 nasids_size; /* SAL: size of each nasid mask in bytes */
+ u64 SAL_nasids_size; /* SAL: size of each nasid mask in bytes */
};

-#define XPC_RP_VERSION _XPC_VERSION(1,1) /* version 1.1 of the reserved page */
+#define XPC_RP_VERSION _XPC_VERSION(2,0) /* version 2.0 of the reserved page */

#define XPC_SUPPORTS_RP_STAMP(_version) \
(_version >= _XPC_VERSION(1,1))
@@ -162,65 +161,109 @@ xpc_compare_stamps(struct timespec *stam
*/
struct xpc_vars {
u8 version;
- u64 heartbeat;
- u64 heartbeating_to_mask;
- u64 heartbeat_offline; /* if 0, heartbeat should be changing */
+ short partid;
+ short npartitions; /* value of XPC_NPARTITIONS */
int act_nasid;
int act_phys_cpuid;
u64 vars_part_pa;
- u64 amos_page_pa; /* paddr of page of AMOs from MSPEC driver */
- AMO_t *amos_page; /* vaddr of page of AMOs from MSPEC driver */
+ u64 amos_page_pa; /* paddr of first page of AMOs variables */
+ u64 *amos_page; /* vaddr of first page of AMOs variables */
+ u64 heartbeat;
+ u64 heartbeat_offline; /* if 0, heartbeat should be changing */
+ u64 heartbeating_to_mask[BITS_TO_LONGS(XP_MAX_NPARTITIONS)];
};

-#define XPC_V_VERSION _XPC_VERSION(3,1) /* version 3.1 of the cross vars */
+#define XPC_V_VERSION _XPC_VERSION(4,0) /* version 4.0 of the cross vars */

#define XPC_SUPPORTS_DISENGAGE_REQUEST(_version) \
(_version >= _XPC_VERSION(3,1))

static inline int
-xpc_hb_allowed(partid_t partid, struct xpc_vars *vars)
+xpc_hb_allowed(short partid, struct xpc_vars *vars)
{
- return ((vars->heartbeating_to_mask & (1UL << partid)) != 0);
+ return test_bit(partid, vars->heartbeating_to_mask);
+}
+
+static inline int
+xpc_any_hbs_allowed(struct xpc_vars *vars)
+{
+ return !bitmap_empty((unsigned long *)vars->heartbeating_to_mask,
+ vars->npartitions);
}

static inline void
-xpc_allow_hb(partid_t partid, struct xpc_vars *vars)
+xpc_allow_hb(short partid, struct xpc_vars *vars)
{
- u64 old_mask, new_mask;
+ set_bit(partid, vars->heartbeating_to_mask);
+}

- do {
- old_mask = vars->heartbeating_to_mask;
- new_mask = (old_mask | (1UL << partid));
- } while (cmpxchg(&vars->heartbeating_to_mask, old_mask, new_mask) !=
- old_mask);
+static inline void
+xpc_disallow_hb(short partid, struct xpc_vars *vars)
+{
+ clear_bit(partid, vars->heartbeating_to_mask);
}

static inline void
-xpc_disallow_hb(partid_t partid, struct xpc_vars *vars)
+xpc_disallow_all_hbs(struct xpc_vars *vars)
{
- u64 old_mask, new_mask;
+ int nlongs = BITS_TO_LONGS(vars->npartitions);
+ int i;

- do {
- old_mask = vars->heartbeating_to_mask;
- new_mask = (old_mask & ~(1UL << partid));
- } while (cmpxchg(&vars->heartbeating_to_mask, old_mask, new_mask) !=
- old_mask);
+ for (i = 0; i < nlongs; i++)
+ vars->heartbeating_to_mask[i] = 0;
}

/*
- * The AMOs page consists of a number of AMO variables which are divided into
- * four groups, The first two groups are used to identify an IRQ's sender.
- * These two groups consist of 64 and 128 AMO variables respectively. The last
- * two groups, consisting of just one AMO variable each, are used to identify
- * the remote partitions that are currently engaged (from the viewpoint of
- * the XPC running on the remote partition).
+ * The AMOs page(s) consists of a number of AMO variables which are divided into
+ * four groups, The first group consists of one AMO per partition, each of which
+ * reflects state changes of up to eight channels and are accompanied by the
+ * receipt of a NOTIFY IRQ. The second group represents a bitmap of nasids by
+ * which to identify an ACTIVATE IRQ's sender. The last two groups, each
+ * representing a bitmap of partids, are used to identify the remote partitions
+ * that are currently engaged (from the viewpoint of the XPC running on the
+ * remote partition).
+ *
+ * The following #defines reflect an AMO index into these AMOS page(s).
*/
-#define XPC_NOTIFY_IRQ_AMOS 0
-#define XPC_ACTIVATE_IRQ_AMOS (XPC_NOTIFY_IRQ_AMOS + XP_MAX_PARTITIONS)
-#define XPC_ENGAGED_PARTITIONS_AMO (XPC_ACTIVATE_IRQ_AMOS + XP_NASID_MASK_WORDS)
-#define XPC_DISENGAGE_REQUEST_AMO (XPC_ENGAGED_PARTITIONS_AMO + 1)
+
+/* get offset to beginning of notify IRQ AMOs */
+static inline int
+xpc_notify_irq_amos(void)
+{
+ return 0;
+}
+
+/* get offset to beginning of activate IRQ AMOs */
+static inline int
+xpc_activate_irq_amos(int npartitions)
+{
+ return xpc_notify_irq_amos() + npartitions;
+}
+
+/* get offset to beginning of engaged partitions AMOs */
+static inline int
+xpc_engaged_partitions_amos(int npartitions)
+{
+ return xpc_activate_irq_amos(npartitions) + xp_nasid_mask_words();
+}
+
+/* get offset to beginning of disengaged request AMOs */
+static inline int
+xpc_disengage_request_amos(int npartitions)
+{
+ return xpc_engaged_partitions_amos(npartitions) +
+ xp_partid_mask_words(npartitions);
+}
+
+/* get total number of AMOs */
+static inline int
+xpc_number_of_amos(int npartitions)
+{
+ return xpc_disengage_request_amos(npartitions) +
+ xp_partid_mask_words(npartitions);
+}

/*
@@ -239,7 +282,7 @@ struct xpc_vars_part {
u64 openclose_args_pa; /* physical address of open and close args */
u64 GPs_pa; /* physical address of Get/Put values */

- u64 IPI_amo_pa; /* physical address of IPI AMO_t structure */
+ u64 IPI_amo_pa; /* physical address of IPI AMO variable */
int IPI_nasid; /* nasid of where to send IPIs */
int IPI_phys_cpuid; /* physical CPU ID of where to send IPIs */

@@ -266,10 +309,12 @@ struct xpc_vars_part {
#define XPC_RP_HEADER_SIZE L1_CACHE_ALIGN(sizeof(struct xpc_rsvd_page))
#define XPC_RP_VARS_SIZE L1_CACHE_ALIGN(sizeof(struct xpc_vars))

-#define XPC_RP_PART_NASIDS(_rp) (u64 *) ((u8 *) _rp + XPC_RP_HEADER_SIZE)
-#define XPC_RP_MACH_NASIDS(_rp) (XPC_RP_PART_NASIDS(_rp) + xp_nasid_mask_words)
-#define XPC_RP_VARS(_rp) ((struct xpc_vars *) XPC_RP_MACH_NASIDS(_rp) + xp_nasid_mask_words)
-#define XPC_RP_VARS_PART(_rp) (struct xpc_vars_part *) ((u8 *) XPC_RP_VARS(rp) + XPC_RP_VARS_SIZE)
+#define XPC_RP_PART_NASIDS(_rp) (u64 *)((u8 *)(_rp) + XPC_RP_HEADER_SIZE)
+#define XPC_RP_MACH_NASIDS(_rp) (XPC_RP_PART_NASIDS(_rp) + \
+ xp_nasid_mask_words())
+#define XPC_RP_VARS(_rp) (struct xpc_vars *)(XPC_RP_MACH_NASIDS(_rp) + \
+ xp_nasid_mask_words())
+#define XPC_RP_VARS_PART(_rp) (struct xpc_vars_part *)((u8 *)XPC_RP_VARS(_rp) + XPC_RP_VARS_SIZE)

/*
@@ -428,11 +473,11 @@ struct xpc_notify {
* messages.
*/
struct xpc_channel {
- partid_t partid; /* ID of remote partition connected */
+ short partid; /* ID of remote partition connected */
spinlock_t lock; /* lock for updating this structure */
u32 flags; /* general flags */

- enum xpc_retval reason; /* reason why channel is disconnect'g */
+ enum xp_retval reason; /* reason why channel is disconnect'g */
int reason_line; /* line# disconnect initiated from */

u16 number; /* channel # */
@@ -481,16 +526,11 @@ struct xpc_channel {

/* kthread management related fields */

-// >>> rethink having kthreads_assigned_limit and kthreads_idle_limit; perhaps
-// >>> allow the assigned limit be unbounded and let the idle limit be dynamic
-// >>> dependent on activity over the last interval of time
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 */
- // >>> following field is temporary
- u32 kthreads_created; /* total #of kthreads created */

wait_queue_head_t idle_wq; /* idle kthread wait queue */

@@ -538,6 +578,8 @@ struct xpc_partition {
/* XPC HB infrastructure */

u8 remote_rp_version; /* version# of partition's rsvd pg */
+ short remote_npartitions; /* value of XPC_NPARTITIONS */
+ u32 flags; /* general flags */
struct timespec remote_rp_stamp;/* time when rsvd pg was initialized */
u64 remote_rp_pa; /* phys addr of partition's rsvd pg */
u64 remote_vars_pa; /* phys addr of partition's vars */
@@ -547,10 +589,11 @@ struct xpc_partition {
int remote_act_nasid; /* active part's act/deact nasid */
int remote_act_phys_cpuid; /* active part's act/deact phys cpuid */
u32 act_IRQ_rcvd; /* IRQs since activation */
- spinlock_t act_lock; /* protect updating of act_state */
+ spinlock_t lock; /* protect updating of act_state and */
+ /* the general flags */
u8 act_state; /* from XPC HB viewpoint */
u8 remote_vars_version; /* version# of partition's vars */
- enum xpc_retval reason; /* reason partition is deactivating */
+ enum xp_retval reason; /* reason partition is deactivating */
int reason_line; /* line# deactivation initiated from */
int reactivate_nasid; /* nasid in partition to reactivate */

@@ -601,9 +644,9 @@ struct xpc_partition {

int remote_IPI_nasid; /* nasid of where to send IPIs */
int remote_IPI_phys_cpuid; /* phys CPU ID of where to send IPIs */
- AMO_t *remote_IPI_amo_va; /* address of remote IPI AMO_t structure */
+ u64 *remote_IPI_amo_va; /* address of remote IPI AMO variable */

- AMO_t *local_IPI_amo_va; /* address of IPI AMO_t structure */
+ u64 *local_IPI_amo_va; /* address of IPI AMO variable */
u64 local_IPI_amo; /* IPI amo flags yet to be handled */
char IPI_owner[8]; /* IPI owner's name */
struct timer_list dropped_IPI_timer; /* dropped IPI timer */
@@ -618,14 +661,17 @@ struct xpc_partition {

} ____cacheline_aligned;

+/* struct xpc_partition flags */
+
+#define XPC_P_RAMOSREGISTERED 0x00000001 /* remote AMOs were registered */

/* struct xpc_partition act_state values (for XPC HB) */

-#define XPC_P_INACTIVE 0x00 /* partition is not active */
-#define XPC_P_ACTIVATION_REQ 0x01 /* created thread to activate */
-#define XPC_P_ACTIVATING 0x02 /* activation thread started */
-#define XPC_P_ACTIVE 0x03 /* xpc_partition_up() was called */
-#define XPC_P_DEACTIVATING 0x04 /* partition deactivation initiated */
+#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) \
@@ -634,10 +680,10 @@ struct xpc_partition {

/* struct xpc_partition setup_state values */

-#define XPC_P_UNSET 0x00 /* infrastructure was never setup */
-#define XPC_P_SETUP 0x01 /* infrastructure is setup */
-#define XPC_P_WTEARDOWN 0x02 /* waiting to teardown infrastructure */
-#define XPC_P_TORNDOWN 0x03 /* infrastructure is torndown */
+#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 */

@@ -646,7 +692,7 @@ struct xpc_partition {
* dropped IPIs. These occur whenever an IPI amo write doesn't complete until
* after the IPI was received.
*/
-#define XPC_P_DROPPED_IPI_WAIT (0.25 * HZ)
+#define XPC_DROPPED_IPI_WAIT_INTERVAL (0.25 * HZ)

/* number of seconds to wait for other partitions to disengage */
@@ -656,7 +702,7 @@ struct xpc_partition {
#define XPC_DISENGAGE_PRINTMSG_INTERVAL 10

-#define XPC_PARTID(_p) ((partid_t) ((_p) - &xpc_partitions[0]))
+#define XPC_PARTID(_p) ((short) ((_p) - &xpc_partitions[0]))

@@ -682,41 +728,41 @@ extern int xpc_exiting;
extern struct xpc_vars *xpc_vars;
extern struct xpc_rsvd_page *xpc_rsvd_page;
extern struct xpc_vars_part *xpc_vars_part;
-extern struct xpc_partition xpc_partitions[XP_MAX_PARTITIONS + 1];
+extern struct xpc_partition xpc_partitions[XP_NPARTITIONS + 1];
extern char *xpc_remote_copy_buffer;
extern void *xpc_remote_copy_buffer_base;
extern void *xpc_kmalloc_cacheline_aligned(size_t, gfp_t, void **);
extern struct xpc_rsvd_page *xpc_rsvd_page_init(void);
-extern void xpc_allow_IPI_ops(void);
-extern void xpc_restrict_IPI_ops(void);
extern int xpc_identify_act_IRQ_sender(void);
extern int xpc_partition_disengaged(struct xpc_partition *);
-extern enum xpc_retval xpc_mark_partition_active(struct xpc_partition *);
+extern enum xp_retval xpc_mark_partition_active(struct xpc_partition *);
+extern void xpc_deactivate_partition(const int, struct xpc_partition *,
+ enum xp_retval);
extern void xpc_mark_partition_inactive(struct xpc_partition *);
+extern enum xp_retval xpc_register_remote_amos(struct xpc_partition *);
+extern void xpc_unregister_remote_amos(struct xpc_partition *);
extern void xpc_discovery(void);
extern void xpc_check_remote_hb(void);
-extern void xpc_deactivate_partition(const int, struct xpc_partition *,
- enum xpc_retval);
-extern enum xpc_retval xpc_initiate_partid_to_nasids(partid_t, void *);
+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 xpc_retval xpc_initiate_allocate(partid_t, int, u32, void **);
-extern enum xpc_retval xpc_initiate_send(partid_t, int, void *);
-extern enum xpc_retval xpc_initiate_send_notify(partid_t, int, void *,
+extern enum xp_retval xpc_initiate_allocate(short, int, u32, void **);
+extern enum xp_retval xpc_initiate_send(short, int, void *);
+extern enum xp_retval xpc_initiate_send_notify(short, int, void *,
xpc_notify_func, void *);
-extern void xpc_initiate_received(partid_t, int, void *);
-extern enum xpc_retval xpc_setup_infrastructure(struct xpc_partition *);
-extern enum xpc_retval xpc_pull_remote_vars_part(struct xpc_partition *);
+extern void xpc_initiate_received(short, int, void *);
+extern enum xp_retval xpc_setup_infrastructure(struct xpc_partition *);
+extern enum xp_retval xpc_pull_remote_vars_part(struct xpc_partition *);
extern void xpc_process_channel_activity(struct xpc_partition *);
extern void xpc_connected_callout(struct xpc_channel *);
extern void xpc_deliver_msg(struct xpc_channel *);
extern void xpc_disconnect_channel(const int, struct xpc_channel *,
- enum xpc_retval, unsigned long *);
-extern void xpc_disconnect_callout(struct xpc_channel *, enum xpc_retval);
-extern void xpc_partition_going_down(struct xpc_partition *, enum xpc_retval);
+ 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);
extern void xpc_teardown_infrastructure(struct xpc_partition *);

@@ -769,7 +815,7 @@ xpc_part_deref(struct xpc_partition *par

DBUG_ON(refs < 0);
- if (refs == 0 && part->setup_state == XPC_P_WTEARDOWN) {
+ if (refs == 0 && part->setup_state == XPC_P_SS_WTEARDOWN) {
wake_up(&part->teardown_wq);
}
}
@@ -781,7 +827,7 @@ xpc_part_ref(struct xpc_partition *part)

atomic_inc(&part->references);
- setup = (part->setup_state == XPC_P_SETUP);
+ setup = (part->setup_state == XPC_P_SS_SETUP);
if (!setup) {
xpc_part_deref(part);
}
@@ -811,145 +857,123 @@ xpc_part_ref(struct xpc_partition *part)
static inline void
xpc_mark_partition_engaged(struct xpc_partition *part)
{
- unsigned long irq_flags;
- AMO_t *amo = (AMO_t *) __va(part->remote_amos_page_pa +
- (XPC_ENGAGED_PARTITIONS_AMO * sizeof(AMO_t)));
-
-
- local_irq_save(irq_flags);
+ u64 *amo_va = __va(part->remote_amos_page_pa +
+ (xpc_engaged_partitions_amos(part->remote_npartitions) +
+ BIT_WORD(xp_partition_id)) * xp_sizeof_amo);

/* set bit corresponding to our partid in remote partition's AMO */
- FETCHOP_STORE_OP(TO_AMO((u64) &amo->variable), FETCHOP_OR,
- (1UL << sn_partition_id));
- /*
- * We must always use the nofault function regardless of whether we
- * are on a Shub 1.1 system or a Shub 1.2 slice 0xc processor. If we
- * didn't, we'd never know that the other partition is down and would
- * keep sending IPIs and AMOs to it until the heartbeat times out.
- */
- (void) xp_nofault_PIOR((u64 *) GLOBAL_MMR_ADDR(NASID_GET(&amo->
- variable), xp_nofault_PIOR_target));
-
- local_irq_restore(irq_flags);
+ (void)xp_set_amo(amo_va, XP_AMO_OR, BIT_MASK(xp_partition_id), 1);
}

static inline void
xpc_mark_partition_disengaged(struct xpc_partition *part)
{
- unsigned long irq_flags;
- AMO_t *amo = (AMO_t *) __va(part->remote_amos_page_pa +
- (XPC_ENGAGED_PARTITIONS_AMO * sizeof(AMO_t)));
-
-
- local_irq_save(irq_flags);
+ u64 *amo_va = __va(part->remote_amos_page_pa +
+ (xpc_engaged_partitions_amos(part->remote_npartitions) +
+ BIT_WORD(xp_partition_id)) * xp_sizeof_amo);

/* clear bit corresponding to our partid in remote partition's AMO */
- FETCHOP_STORE_OP(TO_AMO((u64) &amo->variable), FETCHOP_AND,
- ~(1UL << sn_partition_id));
- /*
- * We must always use the nofault function regardless of whether we
- * are on a Shub 1.1 system or a Shub 1.2 slice 0xc processor. If we
- * didn't, we'd never know that the other partition is down and would
- * keep sending IPIs and AMOs to it until the heartbeat times out.
- */
- (void) xp_nofault_PIOR((u64 *) GLOBAL_MMR_ADDR(NASID_GET(&amo->
- variable), xp_nofault_PIOR_target));
-
- local_irq_restore(irq_flags);
+ (void)xp_set_amo(amo_va, XP_AMO_AND, ~BIT_MASK(xp_partition_id), 1);
}

static inline void
xpc_request_partition_disengage(struct xpc_partition *part)
{
- unsigned long irq_flags;
- AMO_t *amo = (AMO_t *) __va(part->remote_amos_page_pa +
- (XPC_DISENGAGE_REQUEST_AMO * sizeof(AMO_t)));
-
-
- local_irq_save(irq_flags);
+ u64 *amo_va = __va(part->remote_amos_page_pa +
+ (xpc_disengage_request_amos(part->remote_npartitions) +
+ BIT_WORD(xp_partition_id)) * xp_sizeof_amo);

/* set bit corresponding to our partid in remote partition's AMO */
- FETCHOP_STORE_OP(TO_AMO((u64) &amo->variable), FETCHOP_OR,
- (1UL << sn_partition_id));
- /*
- * We must always use the nofault function regardless of whether we
- * are on a Shub 1.1 system or a Shub 1.2 slice 0xc processor. If we
- * didn't, we'd never know that the other partition is down and would
- * keep sending IPIs and AMOs to it until the heartbeat times out.
- */
- (void) xp_nofault_PIOR((u64 *) GLOBAL_MMR_ADDR(NASID_GET(&amo->
- variable), xp_nofault_PIOR_target));
-
- local_irq_restore(irq_flags);
+ (void)xp_set_amo(amo_va, XP_AMO_OR, BIT_MASK(xp_partition_id), 1);
}

static inline void
xpc_cancel_partition_disengage_request(struct xpc_partition *part)
{
- unsigned long irq_flags;
- AMO_t *amo = (AMO_t *) __va(part->remote_amos_page_pa +
- (XPC_DISENGAGE_REQUEST_AMO * sizeof(AMO_t)));
-
-
- local_irq_save(irq_flags);
+ u64 *amo_va = __va(part->remote_amos_page_pa +
+ (xpc_disengage_request_amos(part->remote_npartitions) +
+ BIT_WORD(xp_partition_id)) * xp_sizeof_amo);

/* clear bit corresponding to our partid in remote partition's AMO */
- FETCHOP_STORE_OP(TO_AMO((u64) &amo->variable), FETCHOP_AND,
- ~(1UL << sn_partition_id));
- /*
- * We must always use the nofault function regardless of whether we
- * are on a Shub 1.1 system or a Shub 1.2 slice 0xc processor. If we
- * didn't, we'd never know that the other partition is down and would
- * keep sending IPIs and AMOs to it until the heartbeat times out.
- */
- (void) xp_nofault_PIOR((u64 *) GLOBAL_MMR_ADDR(NASID_GET(&amo->
- variable), xp_nofault_PIOR_target));
-
- local_irq_restore(irq_flags);
+ (void)xp_set_amo(amo_va, XP_AMO_AND, ~BIT_MASK(xp_partition_id), 1);
}

-static inline u64
-xpc_partition_engaged(u64 partid_mask)
+static inline int
+xpc_any_partition_engaged(void)
{
- AMO_t *amo = xpc_vars->amos_page + XPC_ENGAGED_PARTITIONS_AMO;
+ enum xp_retval ret;
+ int w_index;
+ u64 *amo_va = (u64 *)((u64)xpc_vars->amos_page +
+ xpc_engaged_partitions_amos(xpc_vars->npartitions) *
+ xp_sizeof_amo);
+ u64 amo;
+
+ for (w_index = 0; w_index < xp_partid_mask_words(xpc_vars->npartitions);
+ w_index++) {
+ ret = xp_get_amo(amo_va, XP_AMO_LOAD, &amo);
+ BUG_ON(ret != xpSuccess); /* should never happen */
+ if (amo != 0)
+ return 1;

-
- /* return our partition's AMO variable ANDed with partid_mask */
- return (FETCHOP_LOAD_OP(TO_AMO((u64) &amo->variable), FETCHOP_LOAD) &
- partid_mask);
+ amo_va = (u64 *)((u64)amo_va + xp_sizeof_amo);
+ }
+ return 0;
}

static inline u64
-xpc_partition_disengage_requested(u64 partid_mask)
+xpc_partition_engaged(short partid)
{
- AMO_t *amo = xpc_vars->amos_page + XPC_DISENGAGE_REQUEST_AMO;
+ enum xp_retval ret;
+ u64 *amo_va = (u64 *)((u64)xpc_vars->amos_page +
+ (xpc_engaged_partitions_amos(xpc_vars->npartitions) +
+ BIT_WORD(partid)) * xp_sizeof_amo);
+ u64 amo;
+
+ /* return our partition's AMO variable ANDed with partid mask */
+ ret = xp_get_amo(amo_va, XP_AMO_LOAD, &amo);
+ BUG_ON(ret != xpSuccess); /* should never happen */
+ return (amo & BIT_MASK(partid));
+}

+static inline u64
+xpc_partition_disengage_requested(short partid)
+{
+ enum xp_retval ret;
+ u64 *amo_va = (u64 *)((u64)xpc_vars->amos_page +
+ (xpc_disengage_request_amos(xpc_vars->npartitions) +
+ BIT_WORD(partid)) * xp_sizeof_amo);
+ u64 amo;

- /* return our partition's AMO variable ANDed with partid_mask */
- return (FETCHOP_LOAD_OP(TO_AMO((u64) &amo->variable), FETCHOP_LOAD) &
- partid_mask);
+ /* return our partition's AMO variable ANDed with partid mask */
+ ret = xp_get_amo(amo_va, XP_AMO_LOAD, &amo);
+ BUG_ON(ret != xpSuccess); /* should never happen */
+ return (amo & BIT_MASK(partid));
}

static inline void
-xpc_clear_partition_engaged(u64 partid_mask)
+xpc_clear_partition_engaged(short partid)
{
- AMO_t *amo = xpc_vars->amos_page + XPC_ENGAGED_PARTITIONS_AMO;
+ enum xp_retval ret;
+ u64 *amo_va = (u64 *)((u64)xpc_vars->amos_page +
+ (xpc_engaged_partitions_amos(xpc_vars->npartitions) +
+ BIT_WORD(partid)) * xp_sizeof_amo);

-
- /* clear bit(s) based on partid_mask in our partition's AMO */
- FETCHOP_STORE_OP(TO_AMO((u64) &amo->variable), FETCHOP_AND,
- ~partid_mask);
+ /* clear bit corresponding to partid in our partition's AMO */
+ ret = xp_set_amo(amo_va, XP_AMO_AND, ~BIT_MASK(partid), 0);
+ BUG_ON(ret != xpSuccess); /* should never happen */
}

static inline void
-xpc_clear_partition_disengage_request(u64 partid_mask)
+xpc_clear_partition_disengage_request(short partid)
{
- AMO_t *amo = xpc_vars->amos_page + XPC_DISENGAGE_REQUEST_AMO;
-
+ enum xp_retval ret;
+ u64 *amo_va = (u64 *)((u64)xpc_vars->amos_page +
+ (xpc_disengage_request_amos(xpc_vars->npartitions) +
+ BIT_WORD(partid)) * xp_sizeof_amo);

- /* clear bit(s) based on partid_mask in our partition's AMO */
- FETCHOP_STORE_OP(TO_AMO((u64) &amo->variable), FETCHOP_AND,
- ~partid_mask);
+ /* clear bit corresponding to partid in our partition's AMO */
+ ret = xp_set_amo(amo_va, XP_AMO_AND, ~BIT_MASK(partid), 0);
+ BUG_ON(ret != xpSuccess); /* should never happen */
}

@@ -961,40 +985,6 @@ xpc_clear_partition_disengage_request(u6
* the other that is associated with channel activity (SGI_XPC_NOTIFY).
*/

-static inline u64
-xpc_IPI_receive(AMO_t *amo)
-{
- return FETCHOP_LOAD_OP(TO_AMO((u64) &amo->variable), FETCHOP_CLEAR);
-}
-
-
-static inline enum xpc_retval
-xpc_IPI_send(AMO_t *amo, u64 flag, int nasid, int phys_cpuid, int vector)
-{
- int ret = 0;
- unsigned long irq_flags;
-
-
- local_irq_save(irq_flags);
-
- FETCHOP_STORE_OP(TO_AMO((u64) &amo->variable), FETCHOP_OR, flag);
- sn_send_IPI_phys(nasid, phys_cpuid, vector, 0);
-
- /*
- * We must always use the nofault function regardless of whether we
- * are on a Shub 1.1 system or a Shub 1.2 slice 0xc processor. If we
- * didn't, we'd never know that the other partition is down and would
- * keep sending IPIs and AMOs to it until the heartbeat times out.
- */
- ret = xp_nofault_PIOR((u64 *) GLOBAL_MMR_ADDR(NASID_GET(&amo->variable),
- xp_nofault_PIOR_target));
-
- local_irq_restore(irq_flags);
-
- return ((ret == 0) ? xpcSuccess : xpcPioReadError);
-}
-
-
/*
* IPIs associated with SGI_XPC_ACTIVATE IRQ.
*/
@@ -1004,44 +994,53 @@ xpc_IPI_send(AMO_t *amo, u64 flag, int n
*/
static inline void
xpc_activate_IRQ_send(u64 amos_page_pa, int from_nasid, int to_nasid,
- int to_phys_cpuid)
+ int to_phys_cpuid, int remote_amo, int npartitions)
{
- int w_index = XPC_NASID_W_INDEX(from_nasid);
- int b_index = XPC_NASID_B_INDEX(from_nasid);
- AMO_t *amos = (AMO_t *) __va(amos_page_pa +
- (XPC_ACTIVATE_IRQ_AMOS * sizeof(AMO_t)));
-
-
- (void) xpc_IPI_send(&amos[w_index], (1UL << b_index), to_nasid,
- to_phys_cpuid, SGI_XPC_ACTIVATE);
+ enum xp_retval ret;
+ /* SN nodes are always even numbered nasids */
+ u64 *amo_va = (u64 *)__va(amos_page_pa +
+ (xpc_activate_irq_amos(npartitions) +
+ BIT_WORD(from_nasid/2)) * xp_sizeof_amo);
+
+ ret = xp_set_amo_with_interrupt(amo_va, XP_AMO_OR,
+ BIT_MASK(from_nasid/2),
+ remote_amo, to_nasid,
+ to_phys_cpuid, SGI_XPC_ACTIVATE);
+ BUG_ON(!remote_amo && ret != xpSuccess); /* should never happen*/
}

static inline void
xpc_IPI_send_activate(struct xpc_vars *vars)
{
- xpc_activate_IRQ_send(vars->amos_page_pa, cnodeid_to_nasid(0),
- vars->act_nasid, vars->act_phys_cpuid);
+ xpc_activate_IRQ_send(vars->amos_page_pa, xp_node_to_nasid(0),
+ vars->act_nasid, vars->act_phys_cpuid, 1,
+ vars->npartitions);
}

static inline void
xpc_IPI_send_activated(struct xpc_partition *part)
{
- xpc_activate_IRQ_send(part->remote_amos_page_pa, cnodeid_to_nasid(0),
- part->remote_act_nasid, part->remote_act_phys_cpuid);
+ xpc_activate_IRQ_send(part->remote_amos_page_pa, xp_node_to_nasid(0),
+ part->remote_act_nasid,
+ part->remote_act_phys_cpuid, 1,
+ part->remote_npartitions);
}

static inline void
xpc_IPI_send_reactivate(struct xpc_partition *part)
{
xpc_activate_IRQ_send(xpc_vars->amos_page_pa, part->reactivate_nasid,
- xpc_vars->act_nasid, xpc_vars->act_phys_cpuid);
+ xpc_vars->act_nasid, xpc_vars->act_phys_cpuid, 0,
+ xpc_vars->npartitions);
}

static inline void
xpc_IPI_send_disengage(struct xpc_partition *part)
{
- xpc_activate_IRQ_send(part->remote_amos_page_pa, cnodeid_to_nasid(0),
- part->remote_act_nasid, part->remote_act_phys_cpuid);
+ xpc_activate_IRQ_send(part->remote_amos_page_pa, xp_node_to_nasid(0),
+ part->remote_act_nasid,
+ part->remote_act_phys_cpuid, 1,
+ part->remote_npartitions);
}

@@ -1061,26 +1060,25 @@ xpc_notify_IRQ_send(struct xpc_channel *
unsigned long *irq_flags)
{
struct xpc_partition *part = &xpc_partitions[ch->partid];
- enum xpc_retval ret;
+ enum xp_retval ret;
+

+ if (unlikely(part->act_state == XPC_P_AS_DEACTIVATING))
+ return;

- if (likely(part->act_state != XPC_P_DEACTIVATING)) {
- ret = xpc_IPI_send(part->remote_IPI_amo_va,
- (u64) ipi_flag << (ch->number * 8),
+ ret = xp_set_amo_with_interrupt(part->remote_IPI_amo_va, XP_AMO_OR,
+ ((u64)ipi_flag << (ch->number * 8)), 1,
part->remote_IPI_nasid,
part->remote_IPI_phys_cpuid,
SGI_XPC_NOTIFY);
- dev_dbg(xpc_chan, "%s sent to partid=%d, channel=%d, ret=%d\n",
- ipi_flag_string, ch->partid, ch->number, ret);
- if (unlikely(ret != xpcSuccess)) {
- 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);
- }
- }
+ dev_dbg(xpc_chan, "%s sent to partid=%d, channel=%d, ret=%d\n",
+ ipi_flag_string, ch->partid, ch->number, ret);
+ 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);
}
}

@@ -1097,11 +1095,14 @@ static inline void
xpc_notify_IRQ_send_local(struct xpc_channel *ch, u8 ipi_flag,
char *ipi_flag_string)
{
- struct xpc_partition *part = &xpc_partitions[ch->partid];
+ enum xp_retval ret;
+ u64 *amo_va = xpc_partitions[ch->partid].local_IPI_amo_va;

+ /* set IPI flag corresponding to channel in partition's local AMO */
+ ret = xp_set_amo(amo_va, XP_AMO_OR, ((u64)ipi_flag << (ch->number * 8)),
+ 0);
+ BUG_ON(ret != xpSuccess); /* should never happen */

- FETCHOP_STORE_OP(TO_AMO((u64) &part->local_IPI_amo_va->variable),
- FETCHOP_OR, ((u64) ipi_flag << (ch->number * 8)));
dev_dbg(xpc_chan, "%s sent local from partid=%d, channel=%d\n",
ipi_flag_string, ch->partid, ch->number);
}
@@ -1126,8 +1127,8 @@ xpc_notify_IRQ_send_local(struct xpc_cha
#define XPC_GET_IPI_FLAGS(_amo, _c) ((u8) (((_amo) >> ((_c) * 8)) & 0xff))
#define XPC_SET_IPI_FLAGS(_amo, _c, _f) (_amo) |= ((u64) (_f) << ((_c) * 8))

-#define XPC_ANY_OPENCLOSE_IPI_FLAGS_SET(_amo) ((_amo) & __IA64_UL_CONST(0x0f0f0f0f0f0f0f0f))
-#define XPC_ANY_MSG_IPI_FLAGS_SET(_amo) ((_amo) & __IA64_UL_CONST(0x1010101010101010))
+#define XPC_ANY_OPENCLOSE_IPI_FLAGS_SET(_amo) ((_amo) & 0x0f0f0f0f0f0f0f0fUL)
+#define XPC_ANY_MSG_IPI_FLAGS_SET(_amo) ((_amo) & 0x1010101010101010UL)

static inline void
@@ -1185,53 +1186,16 @@ xpc_IPI_send_local_msgrequest(struct xpc
}

-/*
- * Memory for XPC's AMO variables is allocated by the MSPEC driver. These
- * pages are located in the lowest granule. The lowest granule uses 4k pages
- * for cached references and an alternate TLB handler to never provide a
- * cacheable mapping for the entire region. This will prevent speculative
- * reading of cached copies of our lines from being issued which will cause
- * a PI FSB Protocol error to be generated by the SHUB. For XPC, we need 64
- * AMO variables (based on XP_MAX_PARTITIONS) for message notification and an
- * additional 128 AMO variables (based on XP_NASID_MASK_WORDS) for partition
- * activation and 2 AMO variables for partition deactivation.
- */
-static inline AMO_t *
+static inline u64 *
xpc_IPI_init(int index)
{
- AMO_t *amo = xpc_vars->amos_page + index;
-
-
- (void) xpc_IPI_receive(amo); /* clear AMO variable */
- return amo;
-}
-
-
-
-static inline enum xpc_retval
-xpc_map_bte_errors(bte_result_t error)
-{
- if (error == BTE_SUCCESS)
- return xpcSuccess;
-
- if (is_shub2()) {
- if (BTE_VALID_SH2_ERROR(error))
- return xpcBteSh2Start + error;
- return xpcBteUnmappedError;
- }
- switch (error) {
- case BTE_SUCCESS: return xpcSuccess;
- case BTEFAIL_DIR: return xpcBteDirectoryError;
- case BTEFAIL_POISON: return xpcBtePoisonError;
- case BTEFAIL_WERR: return xpcBteWriteError;
- case BTEFAIL_ACCESS: return xpcBteAccessError;
- case BTEFAIL_PWERR: return xpcBtePWriteError;
- case BTEFAIL_PRERR: return xpcBtePReadError;
- case BTEFAIL_TOUT: return xpcBteTimeOutError;
- case BTEFAIL_XTERR: return xpcBteXtalkError;
- case BTEFAIL_NOTAVAIL: return xpcBteNotAvailable;
- default: return xpcBteUnmappedError;
- }
+ enum xp_retval ret;
+ u64 *amo_va = (u64 *)((u64)xpc_vars->amos_page + index *
+ xp_sizeof_amo);
+
+ ret = xp_get_amo(amo_va, XP_AMO_CLEAR, NULL);
+ BUG_ON(ret != xpSuccess); /* should never happen */
+ return amo_va;
}

@@ -1243,11 +1207,13 @@ xpc_map_bte_errors(bte_result_t error)
static inline void
xpc_check_for_channel_activity(struct xpc_partition *part)
{
+ enum xp_retval ret;
u64 IPI_amo;
unsigned long irq_flags;

- IPI_amo = xpc_IPI_receive(part->local_IPI_amo_va);
+ ret = xp_get_amo(part->local_IPI_amo_va, XP_AMO_CLEAR, &IPI_amo);
+ BUG_ON(ret != xpSuccess); /* should never happen */
if (IPI_amo == 0) {
return;
}
@@ -1256,12 +1222,12 @@ xpc_check_for_channel_activity(struct xp
part->local_IPI_amo |= IPI_amo;
spin_unlock_irqrestore(&part->IPI_lock, irq_flags);

- dev_dbg(xpc_chan, "received IPI from partid=%d, IPI_amo=0x%lx\n",
- XPC_PARTID(part), IPI_amo);
+ dev_dbg(xpc_chan, "received IPI from partid=%d, IPI_amo=0x%" U64_ELL
+ "x\n", XPC_PARTID(part), IPI_amo);

xpc_wakeup_channel_mgr(part);
}

-#endif /* _ASM_IA64_SN_XPC_H */
+#endif /* _DRIVERS_MISC_XP_XPC_H */

Index: linux-2.6/drivers/misc/xp/xpc_channel.c
===================================================================
--- linux-2.6.orig/drivers/misc/xp/xpc_channel.c 2008-03-25 13:47:59.962929996 -0500
+++ linux-2.6/drivers/misc/xp/xpc_channel.c 2008-03-25 13:51:08.874454229 -0500
@@ -3,7 +3,7 @@
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * Copyright (c) 2004-2006 Silicon Graphics, Inc. All Rights Reserved.
+ * Copyright (c) 2004-2008 Silicon Graphics, Inc. All Rights Reserved.
*/

@@ -23,9 +23,11 @@
#include <linux/interrupt.h>
#include <linux/mutex.h>
#include <linux/completion.h>
-#include <asm/sn/bte.h>
-#include <asm/sn/sn_sal.h>
-#include <asm/sn/xpc.h>
+#include "xpc.h"
+
+#ifdef CONFIG_X86_64
+#define cmpxchg_rel(ptr,o,n) cmpxchg(ptr,o,n)
+#endif

/*
@@ -57,7 +59,7 @@ xpc_kzalloc_cacheline_aligned(size_t siz
* Set up the initial values for the XPartition Communication channels.
*/
static void
-xpc_initialize_channels(struct xpc_partition *part, partid_t partid)
+xpc_initialize_channels(struct xpc_partition *part, short partid)
{
int ch_number;
struct xpc_channel *ch;
@@ -96,12 +98,12 @@ xpc_initialize_channels(struct xpc_parti
* Setup the infrastructure necessary to support XPartition Communication
* between the specified remote partition and the local one.
*/
-enum xpc_retval
+enum xp_retval
xpc_setup_infrastructure(struct xpc_partition *part)
{
int ret, cpuid;
struct timer_list *timer;
- partid_t partid = XPC_PARTID(part);
+ short partid = XPC_PARTID(part);

/*
@@ -121,7 +123,7 @@ xpc_setup_infrastructure(struct xpc_part
GFP_KERNEL);
if (part->channels == NULL) {
dev_err(xpc_chan, "can't get memory for channels\n");
- return xpcNoMemory;
+ return xpNoMemory;
}

part->nchannels = XPC_NCHANNELS;
@@ -136,7 +138,7 @@ xpc_setup_infrastructure(struct xpc_part
part->channels = NULL;
dev_err(xpc_chan, "can't get memory for local get/put "
"values\n");
- return xpcNoMemory;
+ return xpNoMemory;
}

part->remote_GPs = xpc_kzalloc_cacheline_aligned(XPC_GP_SIZE,
@@ -148,7 +150,7 @@ xpc_setup_infrastructure(struct xpc_part
part->local_GPs = NULL;
kfree(part->channels);
part->channels = NULL;
- return xpcNoMemory;
+ return xpNoMemory;
}

@@ -165,7 +167,7 @@ xpc_setup_infrastructure(struct xpc_part
part->local_GPs = NULL;
kfree(part->channels);
part->channels = NULL;
- return xpcNoMemory;
+ return xpNoMemory;
}

part->remote_openclose_args = xpc_kzalloc_cacheline_aligned(
@@ -181,7 +183,7 @@ xpc_setup_infrastructure(struct xpc_part
part->local_GPs = NULL;
kfree(part->channels);
part->channels = NULL;
- return xpcNoMemory;
+ return xpNoMemory;
}

@@ -193,8 +195,8 @@ xpc_setup_infrastructure(struct xpc_part

/* local_IPI_amo were set to 0 by an earlier memset() */

- /* Initialize this partitions AMO_t structure */
- part->local_IPI_amo_va = xpc_IPI_init(partid);
+ /* Initialize this partitions AMO structure */
+ part->local_IPI_amo_va = xpc_IPI_init(xpc_notify_irq_amos() + partid);

spin_lock_init(&part->IPI_lock);

@@ -217,7 +219,7 @@ xpc_setup_infrastructure(struct xpc_part
part->local_GPs = NULL;
kfree(part->channels);
part->channels = NULL;
- return xpcLackOfResources;
+ return xpLackOfResources;
}

/* Setup a timer to check for dropped IPIs */
@@ -225,14 +227,14 @@ xpc_setup_infrastructure(struct xpc_part
init_timer(timer);
timer->function = (void (*)(unsigned long)) xpc_dropped_IPI_check;
timer->data = (unsigned long) part;
- timer->expires = jiffies + XPC_P_DROPPED_IPI_WAIT;
+ timer->expires = jiffies + XPC_DROPPED_IPI_WAIT_INTERVAL;
add_timer(timer);

/*
- * With the setting of the partition setup_state to XPC_P_SETUP, we're
- * declaring that this partition is ready to go.
+ * 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_SETUP;
+ part->setup_state = XPC_P_SS_SETUP;

/*
@@ -247,12 +249,12 @@ xpc_setup_infrastructure(struct xpc_part
__pa(part->local_openclose_args);
xpc_vars_part[partid].IPI_amo_pa = __pa(part->local_IPI_amo_va);
cpuid = raw_smp_processor_id(); /* any CPU in this partition will do */
- xpc_vars_part[partid].IPI_nasid = cpuid_to_nasid(cpuid);
+ xpc_vars_part[partid].IPI_nasid = xp_cpu_to_nasid(cpuid);
xpc_vars_part[partid].IPI_phys_cpuid = cpu_physical_id(cpuid);
xpc_vars_part[partid].nchannels = part->nchannels;
xpc_vars_part[partid].magic = XPC_VP_MAGIC1;

- return xpcSuccess;
+ return xpSuccess;
}

@@ -260,35 +262,32 @@ xpc_setup_infrastructure(struct xpc_part
* Create a wrapper that hides the underlying mechanism for pulling a cacheline
* (or multiple cachelines) from a remote partition.
*
- * src must be a cacheline aligned physical address on the remote partition.
- * dst must be a cacheline aligned virtual address on this partition.
- * cnt must be an cacheline sized
+ * src must be a cacheline-aligned physical address on the remote partition.
+ * dst must be a cacheline-aligned virtual address on this partition.
+ * cnt must be cacheline sized
*/
-static enum xpc_retval
+static enum xp_retval
xpc_pull_remote_cachelines(struct xpc_partition *part, void *dst,
const void *src, size_t cnt)
{
- bte_result_t bte_ret;
+ enum xp_retval ret;

DBUG_ON((u64) src != L1_CACHE_ALIGN((u64) src));
DBUG_ON((u64) dst != L1_CACHE_ALIGN((u64) dst));
DBUG_ON(cnt != L1_CACHE_ALIGN(cnt));

- if (part->act_state == XPC_P_DEACTIVATING) {
+ if (part->act_state == XPC_P_AS_DEACTIVATING) {
return part->reason;
}

- bte_ret = xp_bte_copy((u64) src, (u64) dst, (u64) cnt,
- (BTE_NORMAL | BTE_WACQUIRE), NULL);
- if (bte_ret == BTE_SUCCESS) {
- return xpcSuccess;
+ ret = xp_remote_memcpy(dst, src, cnt);
+ if (ret != xpSuccess) {
+ dev_dbg(xpc_chan, "xp_remote_memcpy() from partition %d failed,"
+ " ret=%d\n", XPC_PARTID(part), ret);
}

- dev_dbg(xpc_chan, "xp_bte_copy() from partition %d failed, ret=%d\n",
- XPC_PARTID(part), bte_ret);
-
- return xpc_map_bte_errors(bte_ret);
+ return ret;
}

@@ -296,7 +295,7 @@ xpc_pull_remote_cachelines(struct xpc_pa
* Pull the remote per partition specific variables from the specified
* partition.
*/
-enum xpc_retval
+enum xp_retval
xpc_pull_remote_vars_part(struct xpc_partition *part)
{
u8 buffer[L1_CACHE_BYTES * 2];
@@ -304,8 +303,8 @@ xpc_pull_remote_vars_part(struct xpc_par
(struct xpc_vars_part *) L1_CACHE_ALIGN((u64) buffer);
struct xpc_vars_part *pulled_entry;
u64 remote_entry_cacheline_pa, remote_entry_pa;
- partid_t partid = XPC_PARTID(part);
- enum xpc_retval ret;
+ short partid = XPC_PARTID(part);
+ enum xp_retval ret;

/* pull the cacheline that contains the variables we're interested in */
@@ -315,7 +314,7 @@ xpc_pull_remote_vars_part(struct xpc_par
DBUG_ON(sizeof(struct xpc_vars_part) != L1_CACHE_BYTES / 2);

remote_entry_pa = part->remote_vars_part_pa +
- sn_partition_id * sizeof(struct xpc_vars_part);
+ xp_partition_id * sizeof(struct xpc_vars_part);

remote_entry_cacheline_pa = (remote_entry_pa & ~(L1_CACHE_BYTES - 1));

@@ -325,7 +324,7 @@ xpc_pull_remote_vars_part(struct xpc_par
ret = xpc_pull_remote_cachelines(part, pulled_entry_cacheline,
(void *) remote_entry_cacheline_pa,
L1_CACHE_BYTES);
- if (ret != xpcSuccess) {
+ if (ret != xpSuccess) {
dev_dbg(xpc_chan, "failed to pull XPC vars_part from "
"partition %d, ret=%d\n", partid, ret);
return ret;
@@ -339,13 +338,14 @@ xpc_pull_remote_vars_part(struct xpc_par

if (pulled_entry->magic != 0) {
dev_dbg(xpc_chan, "partition %d's XPC vars_part for "
- "partition %d has bad magic value (=0x%lx)\n",
- partid, sn_partition_id, pulled_entry->magic);
- return xpcBadMagic;
+ "partition %d has bad magic value (=0x%"
+ U64_ELL "x)\n", partid, xp_partition_id,
+ pulled_entry->magic);
+ return xpBadMagic;
}

/* they've not been initialized yet */
- return xpcRetry;
+ return xpRetry;
}

if (xpc_vars_part[partid].magic == XPC_VP_MAGIC1) {
@@ -358,8 +358,8 @@ xpc_pull_remote_vars_part(struct xpc_par

dev_err(xpc_chan, "partition %d's XPC vars_part for "
"partition %d are not valid\n", partid,
- sn_partition_id);
- return xpcInvalidAddress;
+ xp_partition_id);
+ return xpInvalidAddress;
}

/* the variables we imported look to be valid */
@@ -367,8 +367,7 @@ xpc_pull_remote_vars_part(struct xpc_par
part->remote_GPs_pa = pulled_entry->GPs_pa;
part->remote_openclose_args_pa =
pulled_entry->openclose_args_pa;
- part->remote_IPI_amo_va =
- (AMO_t *) __va(pulled_entry->IPI_amo_pa);
+ part->remote_IPI_amo_va = __va(pulled_entry->IPI_amo_pa);
part->remote_IPI_nasid = pulled_entry->IPI_nasid;
part->remote_IPI_phys_cpuid = pulled_entry->IPI_phys_cpuid;

@@ -382,10 +381,10 @@ xpc_pull_remote_vars_part(struct xpc_par
}

if (pulled_entry->magic == XPC_VP_MAGIC1) {
- return xpcRetry;
+ return xpRetry;
}

- return xpcSuccess;
+ return xpSuccess;
}

@@ -397,7 +396,7 @@ xpc_get_IPI_flags(struct xpc_partition *
{
unsigned long irq_flags;
u64 IPI_amo;
- enum xpc_retval ret;
+ enum xp_retval ret;

/*
@@ -416,7 +415,7 @@ xpc_get_IPI_flags(struct xpc_partition *
part->remote_openclose_args,
(void *) part->remote_openclose_args_pa,
XPC_OPENCLOSE_ARGS_SIZE);
- if (ret != xpcSuccess) {
+ if (ret != xpSuccess) {
XPC_DEACTIVATE_PARTITION(part, ret);

dev_dbg(xpc_chan, "failed to pull openclose args from "
@@ -432,7 +431,7 @@ xpc_get_IPI_flags(struct xpc_partition *
ret = xpc_pull_remote_cachelines(part, part->remote_GPs,
(void *) part->remote_GPs_pa,
XPC_GP_SIZE);
- if (ret != xpcSuccess) {
+ if (ret != xpSuccess) {
XPC_DEACTIVATE_PARTITION(part, ret);

dev_dbg(xpc_chan, "failed to pull GPs from partition "
@@ -450,18 +449,13 @@ xpc_get_IPI_flags(struct xpc_partition *
/*
* Allocate the local message queue and the notify queue.
*/
-static enum xpc_retval
+static enum xp_retval
xpc_allocate_local_msgqueue(struct xpc_channel *ch)
{
unsigned long irq_flags;
int nentries;
size_t nbytes;

-
- // >>> may want to check for ch->flags & XPC_C_DISCONNECTING between
- // >>> iterations of the for-loop, bail if set?
-
- // >>> should we impose a minimum #of entries? like 4 or 8?
for (nentries = ch->local_nentries; nentries > 0; nentries--) {

nbytes = nentries * ch->msg_size;
@@ -489,19 +483,19 @@ xpc_allocate_local_msgqueue(struct xpc_c
ch->local_nentries = nentries;
}
spin_unlock_irqrestore(&ch->lock, irq_flags);
- return xpcSuccess;
+ return xpSuccess;
}

dev_dbg(xpc_chan, "can't get memory for local message queue and notify "
"queue, partid=%d, channel=%d\n", ch->partid, ch->number);
- return xpcNoMemory;
+ return xpNoMemory;
}

/*
* Allocate the cached remote message queue.
*/
-static enum xpc_retval
+static enum xp_retval
xpc_allocate_remote_msgqueue(struct xpc_channel *ch)
{
unsigned long irq_flags;
@@ -511,10 +505,6 @@ xpc_allocate_remote_msgqueue(struct xpc_

DBUG_ON(ch->remote_nentries <= 0);

- // >>> may want to check for ch->flags & XPC_C_DISCONNECTING between
- // >>> iterations of the for-loop, bail if set?
-
- // >>> should we impose a minimum #of entries? like 4 or 8?
for (nentries = ch->remote_nentries; nentries > 0; nentries--) {

nbytes = nentries * ch->msg_size;
@@ -534,12 +524,12 @@ xpc_allocate_remote_msgqueue(struct xpc_
ch->remote_nentries = nentries;
}
spin_unlock_irqrestore(&ch->lock, irq_flags);
- return xpcSuccess;
+ return xpSuccess;
}

dev_dbg(xpc_chan, "can't get memory for cached remote message queue, "
"partid=%d, channel=%d\n", ch->partid, ch->number);
- return xpcNoMemory;
+ return xpNoMemory;
}

@@ -548,20 +538,20 @@ xpc_allocate_remote_msgqueue(struct xpc_
*
* Note: Assumes all of the channel sizes are filled in.
*/
-static enum xpc_retval
+static enum xp_retval
xpc_allocate_msgqueues(struct xpc_channel *ch)
{
unsigned long irq_flags;
- enum xpc_retval ret;
+ enum xp_retval ret;

DBUG_ON(ch->flags & XPC_C_SETUP);

- if ((ret = xpc_allocate_local_msgqueue(ch)) != xpcSuccess) {
+ if ((ret = xpc_allocate_local_msgqueue(ch)) != xpSuccess) {
return ret;
}

- if ((ret = xpc_allocate_remote_msgqueue(ch)) != xpcSuccess) {
+ if ((ret = xpc_allocate_remote_msgqueue(ch)) != xpSuccess) {
kfree(ch->local_msgqueue_base);
ch->local_msgqueue = NULL;
kfree(ch->notify_queue);
@@ -573,7 +563,7 @@ xpc_allocate_msgqueues(struct xpc_channe
ch->flags |= XPC_C_SETUP;
spin_unlock_irqrestore(&ch->lock, irq_flags);

- return xpcSuccess;
+ return xpSuccess;
}

@@ -586,7 +576,7 @@ xpc_allocate_msgqueues(struct xpc_channe
static void
xpc_process_connect(struct xpc_channel *ch, unsigned long *irq_flags)
{
- enum xpc_retval ret;
+ enum xp_retval ret;

DBUG_ON(!spin_is_locked(&ch->lock));
@@ -603,7 +593,7 @@ xpc_process_connect(struct xpc_channel *
ret = xpc_allocate_msgqueues(ch);
spin_lock_irqsave(&ch->lock, *irq_flags);

- if (ret != xpcSuccess) {
+ if (ret != xpSuccess) {
XPC_DISCONNECT_CHANNEL(ch, ret, irq_flags);
}
if (ch->flags & (XPC_C_CONNECTED | XPC_C_DISCONNECTING)) {
@@ -641,7 +631,7 @@ xpc_process_connect(struct xpc_channel *
* Notify those who wanted to be notified upon delivery of their message.
*/
static void
-xpc_notify_senders(struct xpc_channel *ch, enum xpc_retval reason, s64 put)
+xpc_notify_senders(struct xpc_channel *ch, enum xp_retval reason, s64 put)
{
struct xpc_notify *notify;
u8 notify_type;
@@ -671,16 +661,17 @@ xpc_notify_senders(struct xpc_channel *c

if (notify->func != NULL) {
dev_dbg(xpc_chan, "notify->func() called, notify=0x%p, "
- "msg_number=%ld, partid=%d, channel=%d\n",
- (void *) notify, get, ch->partid, ch->number);
+ "msg_number=%" U64_ELL "d, partid=%d, "
+ "channel=%d\n", (void *) notify, get,
+ ch->partid, ch->number);

notify->func(reason, ch->partid, ch->number,
notify->key);

dev_dbg(xpc_chan, "notify->func() returned, "
- "notify=0x%p, msg_number=%ld, partid=%d, "
- "channel=%d\n", (void *) notify, get,
- ch->partid, ch->number);
+ "notify=0x%p, msg_number=%" U64_ELL "d, "
+ "partid=%d, channel=%d\n", (void *) notify,
+ get, ch->partid, ch->number);
}
}
}
@@ -761,9 +752,9 @@ xpc_process_disconnect(struct xpc_channe
DBUG_ON((ch->flags & XPC_C_CONNECTEDCALLOUT_MADE) &&
!(ch->flags & XPC_C_DISCONNECTINGCALLOUT_MADE));

- if (part->act_state == XPC_P_DEACTIVATING) {
+ if (part->act_state == XPC_P_AS_DEACTIVATING) {
/* can't proceed until the other side disengages from us */
- if (xpc_partition_engaged(1UL << ch->partid)) {
+ if (xpc_partition_engaged(ch->partid)) {
return;
}

@@ -795,7 +786,7 @@ xpc_process_disconnect(struct xpc_channe

if (ch->flags & XPC_C_DISCONNECTINGCALLOUT_MADE) {
spin_unlock_irqrestore(&ch->lock, *irq_flags);
- xpc_disconnect_callout(ch, xpcDisconnected);
+ xpc_disconnect_callout(ch, xpDisconnected);
spin_lock_irqsave(&ch->lock, *irq_flags);
}

@@ -816,7 +807,7 @@ xpc_process_disconnect(struct xpc_channe
/* we won't lose the CPU since we're holding ch->lock */
complete(&ch->wdisconnect_wait);
} else if (ch->delayed_IPI_flags) {
- if (part->act_state != XPC_P_DEACTIVATING) {
+ if (part->act_state != XPC_P_AS_DEACTIVATING) {
/* time to take action on any delayed IPI flags */
spin_lock(&part->IPI_lock);
XPC_SET_IPI_FLAGS(part->local_IPI_amo, ch->number,
@@ -839,7 +830,7 @@ xpc_process_openclose_IPI(struct xpc_par
struct xpc_openclose_args *args =
&part->remote_openclose_args[ch_number];
struct xpc_channel *ch = &part->channels[ch_number];
- enum xpc_retval reason;
+ enum xp_retval reason;

@@ -921,10 +912,10 @@ again:

if (!(ch->flags & XPC_C_DISCONNECTING)) {
reason = args->reason;
- if (reason <= xpcSuccess || reason > xpcUnknownReason) {
- reason = xpcUnknownReason;
- } else if (reason == xpcUnregistering) {
- reason = xpcOtherUnregistering;
+ if (reason <= xpSuccess || reason > xpUnknownReason) {
+ reason = xpUnknownReason;
+ } else if (reason == xpUnregistering) {
+ reason = xpOtherUnregistering;
}

XPC_DISCONNECT_CHANNEL(ch, reason, &irq_flags);
@@ -944,7 +935,7 @@ again:
" channel=%d\n", ch->partid, ch->number);

if (ch->flags & XPC_C_DISCONNECTED) {
- DBUG_ON(part->act_state != XPC_P_DEACTIVATING);
+ DBUG_ON(part->act_state != XPC_P_AS_DEACTIVATING);
spin_unlock_irqrestore(&ch->lock, irq_flags);
return;
}
@@ -981,7 +972,7 @@ again:
"channel=%d\n", args->msg_size, args->local_nentries,
ch->partid, ch->number);

- if (part->act_state == XPC_P_DEACTIVATING ||
+ if (part->act_state == XPC_P_AS_DEACTIVATING ||
(ch->flags & XPC_C_ROPENREQUEST)) {
spin_unlock_irqrestore(&ch->lock, irq_flags);
return;
@@ -1014,7 +1005,7 @@ again:

if (ch->flags & XPC_C_OPENREQUEST) {
if (args->msg_size != ch->msg_size) {
- XPC_DISCONNECT_CHANNEL(ch, xpcUnequalMsgSizes,
+ XPC_DISCONNECT_CHANNEL(ch, xpUnequalMsgSizes,
&irq_flags);
spin_unlock_irqrestore(&ch->lock, irq_flags);
return;
@@ -1034,18 +1025,18 @@ again:

if (IPI_flags & XPC_IPI_OPENREPLY) {

- dev_dbg(xpc_chan, "XPC_IPI_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);
+ dev_dbg(xpc_chan, "XPC_IPI_OPENREPLY (local_msgqueue_pa=0x%"
+ U64_ELL "x, 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)) {
spin_unlock_irqrestore(&ch->lock, irq_flags);
return;
}
if (!(ch->flags & XPC_C_OPENREQUEST)) {
- XPC_DISCONNECT_CHANNEL(ch, xpcOpenCloseError,
+ XPC_DISCONNECT_CHANNEL(ch, xpOpenCloseError,
&irq_flags);
spin_unlock_irqrestore(&ch->lock, irq_flags);
return;
@@ -1097,7 +1088,7 @@ again:
/*
* Attempt to establish a channel connection to a remote partition.
*/
-static enum xpc_retval
+static enum xp_retval
xpc_connect_channel(struct xpc_channel *ch)
{
unsigned long irq_flags;
@@ -1105,12 +1096,12 @@ xpc_connect_channel(struct xpc_channel *

if (mutex_trylock(&registration->mutex) == 0) {
- return xpcRetry;
+ return xpRetry;
}

if (!XPC_CHANNEL_REGISTERED(ch->number)) {
mutex_unlock(&registration->mutex);
- return xpcUnregistered;
+ return xpUnregistered;
}

spin_lock_irqsave(&ch->lock, irq_flags);
@@ -1153,10 +1144,10 @@ xpc_connect_channel(struct xpc_channel *
* the channel lock as needed.
*/
mutex_unlock(&registration->mutex);
- XPC_DISCONNECT_CHANNEL(ch, xpcUnequalMsgSizes,
+ XPC_DISCONNECT_CHANNEL(ch, xpUnequalMsgSizes,
&irq_flags);
spin_unlock_irqrestore(&ch->lock, irq_flags);
- return xpcUnequalMsgSizes;
+ return xpUnequalMsgSizes;
}
} else {
ch->msg_size = registration->msg_size;
@@ -1179,7 +1170,7 @@ xpc_connect_channel(struct xpc_channel *

spin_unlock_irqrestore(&ch->lock, irq_flags);

- return xpcSuccess;
+ return xpSuccess;
}

@@ -1268,7 +1259,7 @@ xpc_process_msg_IPI(struct xpc_partition
* Notify senders that messages sent have been
* received and delivered by the other side.
*/
- xpc_notify_senders(ch, xpcMsgDelivered,
+ xpc_notify_senders(ch, xpMsgDelivered,
ch->remote_GP.get);
}

@@ -1280,9 +1271,9 @@ xpc_process_msg_IPI(struct xpc_partition

ch->w_remote_GP.get = ch->remote_GP.get;

- dev_dbg(xpc_chan, "w_remote_GP.get changed to %ld, partid=%d, "
- "channel=%d\n", ch->w_remote_GP.get, ch->partid,
- ch->number);
+ dev_dbg(xpc_chan, "w_remote_GP.get changed to %" U64_ELL "d, "
+ "partid=%d, channel=%d\n", ch->w_remote_GP.get,
+ ch->partid, ch->number);

/*
* If anyone was waiting for message queue entries to become
@@ -1308,9 +1299,9 @@ xpc_process_msg_IPI(struct xpc_partition

ch->w_remote_GP.put = ch->remote_GP.put;

- dev_dbg(xpc_chan, "w_remote_GP.put changed to %ld, partid=%d, "
- "channel=%d\n", ch->w_remote_GP.put, ch->partid,
- ch->number);
+ dev_dbg(xpc_chan, "w_remote_GP.put changed to %" U64_ELL "d, "
+ "partid=%d, channel=%d\n", ch->w_remote_GP.put,
+ ch->partid, ch->number);

nmsgs_sent = ch->w_remote_GP.put - ch->w_local_GP.get;
if (nmsgs_sent > 0) {
@@ -1371,7 +1362,7 @@ xpc_process_channel_activity(struct xpc_
continue;
}

- if (part->act_state == XPC_P_DEACTIVATING) {
+ if (part->act_state == XPC_P_AS_DEACTIVATING) {
continue;
}

@@ -1411,7 +1402,7 @@ xpc_process_channel_activity(struct xpc_
* at the same time.
*/
void
-xpc_partition_going_down(struct xpc_partition *part, enum xpc_retval reason)
+xpc_partition_going_down(struct xpc_partition *part, enum xp_retval reason)
{
unsigned long irq_flags;
int ch_number;
@@ -1454,7 +1445,7 @@ xpc_partition_going_down(struct xpc_part
void
xpc_teardown_infrastructure(struct xpc_partition *part)
{
- partid_t partid = XPC_PARTID(part);
+ short partid = XPC_PARTID(part);

/*
@@ -1468,8 +1459,8 @@ xpc_teardown_infrastructure(struct xpc_p

DBUG_ON(atomic_read(&part->nchannels_engaged) != 0);
DBUG_ON(atomic_read(&part->nchannels_active) != 0);
- DBUG_ON(part->setup_state != XPC_P_SETUP);
- part->setup_state = XPC_P_WTEARDOWN;
+ DBUG_ON(part->setup_state != XPC_P_SS_SETUP);
+ part->setup_state = XPC_P_SS_WTEARDOWN;

xpc_vars_part[partid].magic = 0;

@@ -1486,7 +1477,7 @@ xpc_teardown_infrastructure(struct xpc_p

/* now we can begin tearing down the infrastructure */

- part->setup_state = XPC_P_TORNDOWN;
+ part->setup_state = XPC_P_SS_TORNDOWN;

/* in case we've still got outstanding timers registered... */
del_timer_sync(&part->dropped_IPI_timer);
@@ -1512,14 +1503,14 @@ xpc_teardown_infrastructure(struct xpc_p
void
xpc_initiate_connect(int ch_number)
{
- partid_t partid;
+ short partid;
struct xpc_partition *part;
struct xpc_channel *ch;

DBUG_ON(ch_number < 0 || ch_number >= XPC_NCHANNELS);

- for (partid = 1; partid < XP_MAX_PARTITIONS; partid++) {
+ for (partid = XP_MIN_PARTID; partid <= XP_MAX_PARTID; partid++) {
part = &xpc_partitions[partid];

if (xpc_part_ref(part)) {
@@ -1542,13 +1533,13 @@ xpc_connected_callout(struct xpc_channel
/* let the registerer know that a connection has been established */

if (ch->func != NULL) {
- dev_dbg(xpc_chan, "ch->func() called, reason=xpcConnected, "
+ dev_dbg(xpc_chan, "ch->func() called, reason=xpConnected, "
"partid=%d, channel=%d\n", ch->partid, ch->number);

- ch->func(xpcConnected, 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=xpcConnected, "
+ dev_dbg(xpc_chan, "ch->func() returned, reason=xpConnected, "
"partid=%d, channel=%d\n", ch->partid, ch->number);
}
}
@@ -1571,7 +1562,7 @@ void
xpc_initiate_disconnect(int ch_number)
{
unsigned long irq_flags;
- partid_t partid;
+ short partid;
struct xpc_partition *part;
struct xpc_channel *ch;

@@ -1579,7 +1570,7 @@ xpc_initiate_disconnect(int ch_number)
DBUG_ON(ch_number < 0 || ch_number >= XPC_NCHANNELS);

/* initiate the channel disconnect for every active partition */
- for (partid = 1; partid < XP_MAX_PARTITIONS; partid++) {
+ for (partid = XP_MIN_PARTID; partid <= XP_MAX_PARTID; partid++) {
part = &xpc_partitions[partid];

if (xpc_part_ref(part)) {
@@ -1591,7 +1582,7 @@ xpc_initiate_disconnect(int ch_number)
if (!(ch->flags & XPC_C_DISCONNECTED)) {
ch->flags |= XPC_C_WDISCONNECT;

- XPC_DISCONNECT_CHANNEL(ch, xpcUnregistering,
+ XPC_DISCONNECT_CHANNEL(ch, xpUnregistering,
&irq_flags);
}

@@ -1617,7 +1608,7 @@ xpc_initiate_disconnect(int ch_number)
*/
void
xpc_disconnect_channel(const int line, struct xpc_channel *ch,
- enum xpc_retval reason, unsigned long *irq_flags)
+ enum xp_retval reason, unsigned long *irq_flags)
{
u32 channel_was_connected = (ch->flags & XPC_C_CONNECTED);

@@ -1654,7 +1645,7 @@ xpc_disconnect_channel(const int line, s

} else if ((ch->flags & XPC_C_CONNECTEDCALLOUT_MADE) &&
!(ch->flags & XPC_C_DISCONNECTINGCALLOUT)) {
- /* start a kthread that will do the xpcDisconnecting callout */
+ /* start a kthread that will do the xpDisconnecting callout */
xpc_create_kthreads(ch, 1, 1);
}

@@ -1668,7 +1659,7 @@ xpc_disconnect_channel(const int line, s

void
-xpc_disconnect_callout(struct xpc_channel *ch, enum xpc_retval reason)
+xpc_disconnect_callout(struct xpc_channel *ch, enum xp_retval reason)
{
/*
* Let the channel's registerer know that the channel is being
@@ -1692,14 +1683,14 @@ xpc_disconnect_callout(struct xpc_channe
* Wait for a message entry to become available for the specified channel,
* but don't wait any longer than 1 jiffy.
*/
-static enum xpc_retval
+static enum xp_retval
xpc_allocate_msg_wait(struct xpc_channel *ch)
{
- enum xpc_retval ret;
+ enum xp_retval ret;

if (ch->flags & XPC_C_DISCONNECTING) {
- DBUG_ON(ch->reason == xpcInterrupted); // >>> Is this true?
+ DBUG_ON(ch->reason == xpInterrupted);
return ch->reason;
}

@@ -1709,11 +1700,11 @@ xpc_allocate_msg_wait(struct xpc_channel

if (ch->flags & XPC_C_DISCONNECTING) {
ret = ch->reason;
- DBUG_ON(ch->reason == xpcInterrupted); // >>> Is this true?
+ DBUG_ON(ch->reason == xpInterrupted);
} else if (ret == 0) {
- ret = xpcTimeout;
+ ret = xpTimeout;
} else {
- ret = xpcInterrupted;
+ ret = xpInterrupted;
}

return ret;
@@ -1724,12 +1715,12 @@ xpc_allocate_msg_wait(struct xpc_channel
* Allocate an entry for a message from the message queue associated with the
* specified channel.
*/
-static enum xpc_retval
+static enum xp_retval
xpc_allocate_msg(struct xpc_channel *ch, u32 flags,
struct xpc_msg **address_of_msg)
{
struct xpc_msg *msg;
- enum xpc_retval ret;
+ enum xp_retval ret;
s64 put;

@@ -1742,7 +1733,7 @@ xpc_allocate_msg(struct xpc_channel *ch,
}
if (!(ch->flags & XPC_C_CONNECTED)) {
xpc_msgqueue_deref(ch);
- return xpcNotConnected;
+ return xpNotConnected;
}

@@ -1751,7 +1742,7 @@ xpc_allocate_msg(struct xpc_channel *ch,
* If none are available, we'll make sure that we grab the latest
* GP values.
*/
- ret = xpcTimeout;
+ ret = xpTimeout;

while (1) {

@@ -1783,17 +1774,17 @@ xpc_allocate_msg(struct xpc_channel *ch,
* that will cause the IPI handler to fetch the latest
* GP values as if an IPI was sent by the other side.
*/
- if (ret == xpcTimeout) {
+ if (ret == xpTimeout) {
xpc_IPI_send_local_msgrequest(ch);
}

if (flags & XPC_NOWAIT) {
xpc_msgqueue_deref(ch);
- return xpcNoWait;
+ return xpNoWait;
}

ret = xpc_allocate_msg_wait(ch);
- if (ret != xpcInterrupted && ret != xpcTimeout) {
+ if (ret != xpInterrupted && ret != xpTimeout) {
xpc_msgqueue_deref(ch);
return ret;
}
@@ -1808,13 +1799,13 @@ xpc_allocate_msg(struct xpc_channel *ch,
DBUG_ON(msg->flags != 0);
msg->number = put;

- dev_dbg(xpc_chan, "w_local_GP.put changed to %ld; msg=0x%p, "
- "msg_number=%ld, partid=%d, channel=%d\n", put + 1,
+ dev_dbg(xpc_chan, "w_local_GP.put changed to %" U64_ELL "d; msg=0x%p, "
+ "msg_number=%" U64_ELL "d, partid=%d, channel=%d\n", put + 1,
(void *) msg, msg->number, ch->partid, ch->number);

*address_of_msg = msg;

- return xpcSuccess;
+ return xpSuccess;
}

@@ -1831,15 +1822,15 @@ xpc_allocate_msg(struct xpc_channel *ch,
* payload - address of the allocated payload area pointer (filled in on
* return) in which the user-defined message is constructed.
*/
-enum xpc_retval
-xpc_initiate_allocate(partid_t partid, int ch_number, u32 flags, void **payload)
+enum xp_retval
+xpc_initiate_allocate(short partid, int ch_number, u32 flags, void **payload)
{
struct xpc_partition *part = &xpc_partitions[partid];
- enum xpc_retval ret = xpcUnknownReason;
+ enum xp_retval ret = xpUnknownReason;
struct xpc_msg *msg = NULL;

- DBUG_ON(partid <= 0 || partid >= XP_MAX_PARTITIONS);
+ DBUG_ON(partid < XP_MIN_PARTID || partid > XP_MAX_PARTID);
DBUG_ON(ch_number < 0 || ch_number >= part->nchannels);

*payload = NULL;
@@ -1901,8 +1892,8 @@ xpc_send_msgs(struct xpc_channel *ch, s6

/* we just set the new value of local_GP->put */

- dev_dbg(xpc_chan, "local_GP->put changed to %ld, partid=%d, "
- "channel=%d\n", put, ch->partid, ch->number);
+ dev_dbg(xpc_chan, "local_GP->put changed to %" U64_ELL "d, "
+ "partid=%d, channel=%d\n", put, ch->partid, ch->number);

send_IPI = 1;

@@ -1925,11 +1916,11 @@ xpc_send_msgs(struct xpc_channel *ch, s6
* local message queue's Put value and sends an IPI to the partition the
* message is being sent to.
*/
-static enum xpc_retval
+static enum xp_retval
xpc_send_msg(struct xpc_channel *ch, struct xpc_msg *msg, u8 notify_type,
xpc_notify_func func, void *key)
{
- enum xpc_retval ret = xpcSuccess;
+ enum xp_retval ret = xpSuccess;
struct xpc_notify *notify = notify;
s64 put, msg_number = msg->number;

@@ -1959,7 +1950,7 @@ xpc_send_msg(struct xpc_channel *ch, str
notify->key = key;
notify->type = notify_type;

- // >>> is a mb() needed here?
+ /* >>> is a mb() needed here? */

if (ch->flags & XPC_C_DISCONNECTING) {
/*
@@ -2022,18 +2013,18 @@ xpc_send_msg(struct xpc_channel *ch, str
* payload - pointer to the payload area allocated via
* xpc_initiate_allocate().
*/
-enum xpc_retval
-xpc_initiate_send(partid_t partid, int ch_number, void *payload)
+enum xp_retval
+xpc_initiate_send(short partid, int ch_number, void *payload)
{
struct xpc_partition *part = &xpc_partitions[partid];
struct xpc_msg *msg = XPC_MSG_ADDRESS(payload);
- enum xpc_retval ret;
+ enum xp_retval ret;

dev_dbg(xpc_chan, "msg=0x%p, partid=%d, channel=%d\n", (void *) msg,
partid, ch_number);

- DBUG_ON(partid <= 0 || partid >= XP_MAX_PARTITIONS);
+ DBUG_ON(partid < XP_MIN_PARTID || partid > XP_MAX_PARTID);
DBUG_ON(ch_number < 0 || ch_number >= part->nchannels);
DBUG_ON(msg == NULL);

@@ -2073,19 +2064,19 @@ xpc_initiate_send(partid_t partid, int c
* receipt. THIS FUNCTION MUST BE NON-BLOCKING.
* key - user-defined key to be passed to the function when it's called.
*/
-enum xpc_retval
-xpc_initiate_send_notify(partid_t partid, int ch_number, void *payload,
+enum xp_retval
+xpc_initiate_send_notify(short partid, int ch_number, void *payload,
xpc_notify_func func, void *key)
{
struct xpc_partition *part = &xpc_partitions[partid];
struct xpc_msg *msg = XPC_MSG_ADDRESS(payload);
- enum xpc_retval ret;
+ enum xp_retval ret;

dev_dbg(xpc_chan, "msg=0x%p, partid=%d, channel=%d\n", (void *) msg,
partid, ch_number);

- DBUG_ON(partid <= 0 || partid >= XP_MAX_PARTITIONS);
+ DBUG_ON(partid < XP_MIN_PARTID || partid > XP_MAX_PARTID);
DBUG_ON(ch_number < 0 || ch_number >= part->nchannels);
DBUG_ON(msg == NULL);
DBUG_ON(func == NULL);
@@ -2103,7 +2094,7 @@ xpc_pull_remote_msg(struct xpc_channel *
struct xpc_msg *remote_msg, *msg;
u32 msg_index, nmsgs;
u64 msg_offset;
- enum xpc_retval ret;
+ enum xp_retval ret;

if (mutex_lock_interruptible(&ch->msg_to_pull_mutex) != 0) {
@@ -2133,12 +2124,13 @@ xpc_pull_remote_msg(struct xpc_channel *
msg_offset);

if ((ret = xpc_pull_remote_cachelines(part, msg, remote_msg,
- nmsgs * ch->msg_size)) != xpcSuccess) {
+ nmsgs * ch->msg_size)) != xpSuccess) {

dev_dbg(xpc_chan, "failed to pull %d msgs starting with"
- " msg %ld from partition %d, channel=%d, "
- "ret=%d\n", nmsgs, ch->next_msg_to_pull,
- ch->partid, ch->number, ret);
+ " msg %" U64_ELL "d from partition %d, "
+ "channel=%d, ret=%d\n", nmsgs,
+ ch->next_msg_to_pull, ch->partid, ch->number,
+ ret);

XPC_DEACTIVATE_PARTITION(part, ret);

@@ -2191,8 +2183,8 @@ xpc_get_deliverable_msg(struct xpc_chann
if (cmpxchg(&ch->w_local_GP.get, get, get + 1) == get) {
/* we got the entry referenced by get */

- dev_dbg(xpc_chan, "w_local_GP.get changed to %ld, "
- "partid=%d, channel=%d\n", get + 1,
+ dev_dbg(xpc_chan, "w_local_GP.get changed to %" U64_ELL
+ "d, partid=%d, channel=%d\n", get + 1,
ch->partid, ch->number);

/* pull the message from the remote partition */
@@ -2234,18 +2226,18 @@ xpc_deliver_msg(struct xpc_channel *ch)

if (ch->func != NULL) {
dev_dbg(xpc_chan, "ch->func() called, msg=0x%p, "
- "msg_number=%ld, partid=%d, channel=%d\n",
- (void *) msg, msg->number, ch->partid,
- ch->number);
+ "msg_number=%" U64_ELL "d, partid=%d, "
+ "channel=%d\n", (void *) msg, msg->number,
+ ch->partid, ch->number);

/* deliver the message to its intended recipient */
- ch->func(xpcMsgReceived, ch->partid, ch->number,
+ ch->func(xpMsgReceived, ch->partid, ch->number,
&msg->payload, ch->key);

dev_dbg(xpc_chan, "ch->func() returned, msg=0x%p, "
- "msg_number=%ld, partid=%d, channel=%d\n",
- (void *) msg, msg->number, ch->partid,
- ch->number);
+ "msg_number=%" U64_ELL "d, partid=%d, "
+ "channel=%d\n", (void *) msg, msg->number,
+ ch->partid, ch->number);
}

atomic_dec(&ch->kthreads_active);
@@ -2299,8 +2291,8 @@ xpc_acknowledge_msgs(struct xpc_channel

/* we just set the new value of local_GP->get */

- dev_dbg(xpc_chan, "local_GP->get changed to %ld, partid=%d, "
- "channel=%d\n", get, ch->partid, ch->number);
+ dev_dbg(xpc_chan, "local_GP->get changed to %" U64_ELL "d, "
+ "partid=%d, channel=%d\n", get, ch->partid, ch->number);

send_IPI = (msg_flags & XPC_M_INTERRUPT);

@@ -2336,7 +2328,7 @@ xpc_acknowledge_msgs(struct xpc_channel
* xpc_initiate_allocate().
*/
void
-xpc_initiate_received(partid_t partid, int ch_number, void *payload)
+xpc_initiate_received(short partid, int ch_number, void *payload)
{
struct xpc_partition *part = &xpc_partitions[partid];
struct xpc_channel *ch;
@@ -2344,13 +2336,14 @@ xpc_initiate_received(partid_t partid, i
s64 get, msg_number = msg->number;

- DBUG_ON(partid <= 0 || partid >= XP_MAX_PARTITIONS);
+ DBUG_ON(partid < XP_MIN_PARTID || partid > XP_MAX_PARTID);
DBUG_ON(ch_number < 0 || ch_number >= part->nchannels);

ch = &part->channels[ch_number];

- dev_dbg(xpc_chan, "msg=0x%p, msg_number=%ld, partid=%d, channel=%d\n",
- (void *) msg, msg_number, ch->partid, ch->number);
+ dev_dbg(xpc_chan, "msg=0x%p, msg_number=%" U64_ELL "d, partid=%d, "
+ "channel=%d\n", (void *) msg, msg_number, ch->partid,
+ ch->number);

DBUG_ON((((u64) msg - (u64) ch->remote_msgqueue) / ch->msg_size) !=
msg_number % ch->remote_nentries);
Index: linux-2.6/drivers/misc/xp/xpc_main.c
===================================================================
--- linux-2.6.orig/drivers/misc/xp/xpc_main.c 2008-03-25 13:47:59.962929996 -0500
+++ linux-2.6/drivers/misc/xp/xpc_main.c 2008-03-25 13:51:08.894456720 -0500
@@ -3,7 +3,7 @@
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * Copyright (c) 2004-2007 Silicon Graphics, Inc. All Rights Reserved.
+ * Copyright (c) 2004-2008 Silicon Graphics, Inc. All Rights Reserved.
*/

@@ -56,10 +56,16 @@
#include <linux/reboot.h>
#include <linux/completion.h>
#include <linux/kdebug.h>
-#include <asm/sn/intr.h>
-#include <asm/sn/sn_sal.h>
+#if defined(CONFIG_IA64)
+#include <asm/sn/clksupport.h>
+#include <asm/sn/shub_mmr.h>
+#elif defined(CONFIG_X86_64)
+#define rtc_time() 1 /* will deal with this on X86_64 shortly */
+#else
+#error architecture is NOT supported
+#endif
#include <asm/uaccess.h>
-#include <asm/sn/xpc.h>
+#include "xpc.h"

/* define two XPC debug device structures to be used with dev_dbg() et al */
@@ -204,7 +210,7 @@ xpc_timeout_partition_disengage_request(
(void) xpc_partition_disengaged(part);

DBUG_ON(part->disengage_request_timeout != 0);
- DBUG_ON(xpc_partition_engaged(1UL << XPC_PARTID(part)) != 0);
+ DBUG_ON(xpc_partition_engaged(XPC_PARTID(part)) != 0);
}

@@ -343,14 +349,14 @@ xpc_initiate_discovery(void *ignore)
* the XPC per partition variables from the remote partition and waiting for
* the remote partition to pull ours.
*/
-static enum xpc_retval
+static enum xp_retval
xpc_make_first_contact(struct xpc_partition *part)
{
- enum xpc_retval ret;
+ enum xp_retval ret;

- while ((ret = xpc_pull_remote_vars_part(part)) != xpcSuccess) {
- if (ret != xpcRetry) {
+ while ((ret = xpc_pull_remote_vars_part(part)) != xpSuccess) {
+ if (ret != xpRetry) {
XPC_DEACTIVATE_PARTITION(part, ret);
return ret;
}
@@ -361,7 +367,7 @@ xpc_make_first_contact(struct xpc_partit
/* wait a 1/4 of a second or so */
(void) msleep_interruptible(250);

- if (part->act_state == XPC_P_DEACTIVATING) {
+ if (part->act_state == XPC_P_AS_DEACTIVATING) {
return part->reason;
}
}
@@ -385,7 +391,7 @@ xpc_make_first_contact(struct xpc_partit
static void
xpc_channel_mgr(struct xpc_partition *part)
{
- while (part->act_state != XPC_P_DEACTIVATING ||
+ while (part->act_state != XPC_P_AS_DEACTIVATING ||
atomic_read(&part->nchannels_active) > 0 ||
!xpc_partition_disengaged(part)) {

@@ -410,13 +416,10 @@ xpc_channel_mgr(struct xpc_partition *pa
(atomic_read(&part->channel_mgr_requests) > 0 ||
(volatile u64) part->local_IPI_amo != 0 ||
((volatile u8) part->act_state ==
- XPC_P_DEACTIVATING &&
+ XPC_P_AS_DEACTIVATING &&
atomic_read(&part->nchannels_active) == 0 &&
xpc_partition_disengaged(part))));
atomic_set(&part->channel_mgr_requests, 1);
-
- // >>> Does it need to wakeup periodically as well? In case we
- // >>> miscalculated the #of kthreads to wakeup or create?
}
}

@@ -443,7 +446,7 @@ xpc_partition_up(struct xpc_partition *p

dev_dbg(xpc_chan, "activating partition %d\n", XPC_PARTID(part));

- if (xpc_setup_infrastructure(part) != xpcSuccess) {
+ if (xpc_setup_infrastructure(part) != xpSuccess) {
return;
}

@@ -456,7 +459,7 @@ xpc_partition_up(struct xpc_partition *p

(void) xpc_part_ref(part); /* this will always succeed */

- if (xpc_make_first_contact(part) == xpcSuccess) {
+ if (xpc_make_first_contact(part) == xpSuccess) {
xpc_channel_mgr(part);
}

@@ -469,30 +472,30 @@ xpc_partition_up(struct xpc_partition *p
static int
xpc_activating(void *__partid)
{
- partid_t partid = (u64) __partid;
+ short partid = (u64) __partid;
struct xpc_partition *part = &xpc_partitions[partid];
unsigned long irq_flags;
struct sched_param param = { .sched_priority = MAX_RT_PRIO - 1 };
int ret;

- DBUG_ON(partid <= 0 || partid >= XP_MAX_PARTITIONS);
+ DBUG_ON(partid < XP_MIN_PARTID || partid > XP_MAX_PARTID);

- spin_lock_irqsave(&part->act_lock, irq_flags);
+ spin_lock_irqsave(&part->lock, irq_flags);

- if (part->act_state == XPC_P_DEACTIVATING) {
- part->act_state = XPC_P_INACTIVE;
- spin_unlock_irqrestore(&part->act_lock, irq_flags);
+ if (part->act_state == XPC_P_AS_DEACTIVATING) {
+ part->act_state = XPC_P_AS_INACTIVE;
+ spin_unlock_irqrestore(&part->lock, irq_flags);
part->remote_rp_pa = 0;
return 0;
}

/* indicate the thread is activating */
- DBUG_ON(part->act_state != XPC_P_ACTIVATION_REQ);
- part->act_state = XPC_P_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);
+ spin_unlock_irqrestore(&part->lock, irq_flags);

dev_dbg(xpc_part, "bringing partition %d up\n", partid);

@@ -512,24 +515,20 @@ xpc_activating(void *__partid)
set_cpus_allowed(current, CPU_MASK_ALL);

/*
- * Register the remote partition's AMOs with SAL so it can handle
- * and cleanup errors within that address range should the remote
- * partition go down. We don't unregister this range because it is
- * difficult to tell when outstanding writes to the remote partition
- * are finished and thus when it is safe to unregister. This should
- * not result in wasted space in the SAL xp_addr_region table because
- * we should get the same page for remote_amos_page_pa after module
- * reloads and system reboots.
+ * Register the remote partition's AMOs so any errors within that
+ * address range can be handled and cleaned up should the remote
+ * partition go down.
*/
- if (sn_register_xp_addr_region(part->remote_amos_page_pa,
- PAGE_SIZE, 1) < 0) {
- dev_warn(xpc_part, "xpc_partition_up(%d) failed to register "
- "xp_addr region\n", partid);
-
- spin_lock_irqsave(&part->act_lock, irq_flags);
- part->act_state = XPC_P_INACTIVE;
- XPC_SET_REASON(part, xpcPhysAddrRegFailed, __LINE__);
- spin_unlock_irqrestore(&part->act_lock, irq_flags);
+ ret = xpc_register_remote_amos(part);
+ if (ret != xpSuccess) {
+ dev_warn(xpc_part, "xpc_activating() failed to register remote "
+ "AMOs for partition %d, ret=%d\n", partid,
+ ret);
+
+ spin_lock_irqsave(&part->lock, irq_flags);
+ part->act_state = XPC_P_AS_INACTIVE;
+ XPC_SET_REASON(part, xpPhysAddrRegFailed, __LINE__);
+ spin_unlock_irqrestore(&part->lock, irq_flags);
part->remote_rp_pa = 0;
return 0;
}
@@ -540,14 +539,16 @@ xpc_activating(void *__partid)

/*
* xpc_partition_up() holds this thread and marks this partition as
- * XPC_P_ACTIVE by calling xpc_hb_mark_active().
+ * XPC_P_AS_ACTIVE by calling xpc_hb_mark_active().
*/
- (void) xpc_partition_up(part);
+ (void)xpc_partition_up(part);

xpc_disallow_hb(partid, xpc_vars);
xpc_mark_partition_inactive(part);

- if (part->reason == xpcReactivating) {
+ xpc_unregister_remote_amos(part);
+
+ if (part->reason == xpReactivating) {
/* interrupting ourselves results in activating partition */
xpc_IPI_send_reactivate(part);
}
@@ -559,27 +560,27 @@ xpc_activating(void *__partid)
void
xpc_activate_partition(struct xpc_partition *part)
{
- partid_t partid = XPC_PARTID(part);
+ short partid = XPC_PARTID(part);
unsigned long irq_flags;
pid_t pid;

- spin_lock_irqsave(&part->act_lock, irq_flags);
+ spin_lock_irqsave(&part->lock, irq_flags);

- DBUG_ON(part->act_state != XPC_P_INACTIVE);
+ DBUG_ON(part->act_state != XPC_P_AS_INACTIVE);

- part->act_state = XPC_P_ACTIVATION_REQ;
- XPC_SET_REASON(part, xpcCloneKThread, __LINE__);
+ part->act_state = XPC_P_AS_ACTIVATION_REQ;
+ XPC_SET_REASON(part, xpCloneKThread, __LINE__);

- spin_unlock_irqrestore(&part->act_lock, irq_flags);
+ spin_unlock_irqrestore(&part->lock, irq_flags);

pid = kernel_thread(xpc_activating, (void *) ((u64) partid), 0);

if (unlikely(pid <= 0)) {
- spin_lock_irqsave(&part->act_lock, irq_flags);
- part->act_state = XPC_P_INACTIVE;
- XPC_SET_REASON(part, xpcCloneKThreadFailed, __LINE__);
- spin_unlock_irqrestore(&part->act_lock, irq_flags);
+ spin_lock_irqsave(&part->lock, irq_flags);
+ part->act_state = XPC_P_AS_INACTIVE;
+ XPC_SET_REASON(part, xpCloneKThreadFailed, __LINE__);
+ spin_unlock_irqrestore(&part->lock, irq_flags);
}
}

@@ -588,7 +589,7 @@ xpc_activate_partition(struct xpc_partit
* Handle the receipt of a SGI_XPC_NOTIFY IRQ by seeing whether the specified
* partition actually sent it. Since SGI_XPC_NOTIFY IRQs may be shared by more
* than one partition, we use an AMO_t structure per partition to indicate
- * whether a partition has sent an IPI or not. >>> If it has, then wake up the
+ * whether a partition has sent an IPI or not. If it has, then wake up the
* associated kthread to handle it.
*
* All SGI_XPC_NOTIFY IRQs received by XPC are the result of IPIs sent by XPC
@@ -603,11 +604,11 @@ xpc_activate_partition(struct xpc_partit
irqreturn_t
xpc_notify_IRQ_handler(int irq, void *dev_id)
{
- partid_t partid = (partid_t) (u64) dev_id;
+ short partid = (short) (u64) dev_id;
struct xpc_partition *part = &xpc_partitions[partid];

- DBUG_ON(partid <= 0 || partid >= XP_MAX_PARTITIONS);
+ DBUG_ON(partid < XP_MIN_PARTID || partid > XP_MAX_PARTID);

if (xpc_part_ref(part)) {
xpc_check_for_channel_activity(part);
@@ -630,7 +631,7 @@ xpc_dropped_IPI_check(struct xpc_partiti
xpc_check_for_channel_activity(part);

part->dropped_IPI_timer.expires = jiffies +
- XPC_P_DROPPED_IPI_WAIT;
+ XPC_DROPPED_IPI_WAIT_INTERVAL;
add_timer(&part->dropped_IPI_timer);
xpc_part_deref(part);
}
@@ -664,7 +665,6 @@ xpc_activate_kthreads(struct xpc_channel

if (needed + assigned > ch->kthreads_assigned_limit) {
needed = ch->kthreads_assigned_limit - assigned;
- // >>>should never be less than 0
if (needed <= 0) {
return;
}
@@ -718,7 +718,7 @@ xpc_kthread_waitmsgs(struct xpc_partitio
static int
xpc_daemonize_kthread(void *args)
{
- partid_t partid = XPC_UNPACK_ARG1(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;
@@ -775,7 +775,7 @@ xpc_daemonize_kthread(void *args)
ch->flags |= XPC_C_DISCONNECTINGCALLOUT;
spin_unlock_irqrestore(&ch->lock, irq_flags);

- xpc_disconnect_callout(ch, xpcDisconnecting);
+ xpc_disconnect_callout(ch, xpDisconnecting);

spin_lock_irqsave(&ch->lock, irq_flags);
ch->flags |= XPC_C_DISCONNECTINGCALLOUT_MADE;
@@ -856,8 +856,8 @@ xpc_create_kthreads(struct xpc_channel *
* 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 xpcDisconnecting callout that this
- * failed kernel_thread would have made.
+ * them is the xpDisconnecting callout that this failed
+ * kernel_thread would have made.
*/

if (atomic_dec_return(&ch->kthreads_assigned) == 0 &&
@@ -876,14 +876,12 @@ xpc_create_kthreads(struct xpc_channel *
* to function.
*/
spin_lock_irqsave(&ch->lock, irq_flags);
- XPC_DISCONNECT_CHANNEL(ch, xpcLackOfResources,
+ XPC_DISCONNECT_CHANNEL(ch, xpLackOfResources,
&irq_flags);
spin_unlock_irqrestore(&ch->lock, irq_flags);
}
break;
}
-
- ch->kthreads_created++; // >>> temporary debug only!!!
}
}

@@ -892,14 +890,14 @@ void
xpc_disconnect_wait(int ch_number)
{
unsigned long irq_flags;
- partid_t partid;
+ 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 = 1; partid < XP_MAX_PARTITIONS; partid++) {
+ for (partid = XP_MIN_PARTID; partid <= XP_MAX_PARTID; partid++) {
part = &xpc_partitions[partid];

if (!xpc_part_ref(part)) {
@@ -920,7 +918,7 @@ xpc_disconnect_wait(int ch_number)
wakeup_channel_mgr = 0;

if (ch->delayed_IPI_flags) {
- if (part->act_state != XPC_P_DEACTIVATING) {
+ if (part->act_state != XPC_P_AS_DEACTIVATING) {
spin_lock(&part->IPI_lock);
XPC_SET_IPI_FLAGS(part->local_IPI_amo,
ch->number, ch->delayed_IPI_flags);
@@ -943,9 +941,9 @@ xpc_disconnect_wait(int ch_number)

static void
-xpc_do_exit(enum xpc_retval reason)
+xpc_do_exit(enum xp_retval reason)
{
- partid_t partid;
+ short partid;
int active_part_count, printed_waiting_msg = 0;
struct xpc_partition *part;
unsigned long printmsg_time, disengage_request_timeout = 0;
@@ -984,11 +982,13 @@ xpc_do_exit(enum xpc_retval reason)
do {
active_part_count = 0;

- for (partid = 1; partid < XP_MAX_PARTITIONS; partid++) {
+ for (partid = XP_MIN_PARTID; partid <= XP_MAX_PARTID;
+ partid++) {
part = &xpc_partitions[partid];

if (xpc_partition_disengaged(part) &&
- part->act_state == XPC_P_INACTIVE) {
+ part->act_state == XPC_P_AS_INACTIVE) {
+ xpc_unregister_remote_amos(part);
continue;
}

@@ -1003,7 +1003,7 @@ xpc_do_exit(enum xpc_retval reason)
}
}

- if (xpc_partition_engaged(-1UL)) {
+ if (xpc_any_partition_engaged()) {
if (time_after(jiffies, printmsg_time)) {
dev_info(xpc_part, "waiting for remote "
"partitions to disengage, timeout in "
@@ -1035,7 +1035,7 @@ xpc_do_exit(enum xpc_retval reason)

} while (1);

- DBUG_ON(xpc_partition_engaged(-1UL));
+ DBUG_ON(xpc_any_partition_engaged());

/* indicate to others that our reserved page is uninitialized */
@@ -1043,9 +1043,9 @@ xpc_do_exit(enum xpc_retval reason)

/* now it's time to eliminate our heartbeat */
del_timer_sync(&xpc_hb_timer);
- DBUG_ON(xpc_vars->heartbeating_to_mask != 0);
+ DBUG_ON(xpc_any_hbs_allowed(xpc_vars) != 0);

- if (reason == xpcUnloading) {
+ if (reason == xpUnloading) {
/* take ourselves off of the reboot_notifier_list */
(void) unregister_reboot_notifier(&xpc_reboot_notifier);

@@ -1054,7 +1054,8 @@ xpc_do_exit(enum xpc_retval reason)
}

/* close down protections for IPI operations */
- xpc_restrict_IPI_ops();
+ xp_disallow_IPI_ops();
+ xp_change_memprotect_shub_wars_1_1(XP_MEMPROT_DISALLOW_ALL);

/* clear the interface to XPC's functions */
@@ -1074,21 +1075,21 @@ xpc_do_exit(enum xpc_retval reason)
static int
xpc_system_reboot(struct notifier_block *nb, unsigned long event, void *unused)
{
- enum xpc_retval reason;
+ enum xp_retval reason;

switch (event) {
case SYS_RESTART:
- reason = xpcSystemReboot;
+ reason = xpSystemReboot;
break;
case SYS_HALT:
- reason = xpcSystemHalt;
+ reason = xpSystemHalt;
break;
case SYS_POWER_OFF:
- reason = xpcSystemPoweroff;
+ reason = xpSystemPoweroff;
break;
default:
- reason = xpcSystemGoingDown;
+ reason = xpSystemGoingDown;
}

xpc_do_exit(reason);
@@ -1096,6 +1097,7 @@ xpc_system_reboot(struct notifier_block
}

+#ifdef CONFIG_IA64
/*
* Notify other partitions to disengage from all references to our memory.
*/
@@ -1103,29 +1105,28 @@ static void
xpc_die_disengage(void)
{
struct xpc_partition *part;
- partid_t partid;
- unsigned long engaged;
+ short partid;
long time, printmsg_time, disengage_request_timeout;

/* keep xpc_hb_checker thread from doing anything (just in case) */
xpc_exiting = 1;

- xpc_vars->heartbeating_to_mask = 0; /* indicate we're deactivated */
+ xpc_disallow_all_hbs(xpc_vars); /* indicate we're deactivated */

- for (partid = 1; partid < XP_MAX_PARTITIONS; partid++) {
+ for (partid = XP_MIN_PARTID; partid <= XP_MAX_PARTID; partid++) {
part = &xpc_partitions[partid];

if (!XPC_SUPPORTS_DISENGAGE_REQUEST(part->
remote_vars_version)) {

/* just in case it was left set by an earlier XPC */
- xpc_clear_partition_engaged(1UL << partid);
+ xpc_clear_partition_engaged(partid);
continue;
}

- if (xpc_partition_engaged(1UL << partid) ||
- part->act_state != XPC_P_INACTIVE) {
+ if (xpc_partition_engaged(partid) ||
+ part->act_state != XPC_P_AS_INACTIVE) {
xpc_request_partition_disengage(part);
xpc_mark_partition_disengaged(part);
xpc_IPI_send_disengage(part);
@@ -1134,23 +1135,23 @@ xpc_die_disengage(void)

time = rtc_time();
printmsg_time = time +
- (XPC_DISENGAGE_PRINTMSG_INTERVAL * sn_rtc_cycles_per_second);
+ (XPC_DISENGAGE_PRINTMSG_INTERVAL * xp_rtc_cycles_per_second);
disengage_request_timeout = time +
- (xpc_disengage_request_timelimit * sn_rtc_cycles_per_second);
+ (xpc_disengage_request_timelimit * xp_rtc_cycles_per_second);

/* wait for all other partitions to disengage from us */

while (1) {
- engaged = xpc_partition_engaged(-1UL);
- if (!engaged) {
+ if (!xpc_any_partition_engaged()) {
dev_info(xpc_part, "all partitions have disengaged\n");
break;
}

time = rtc_time();
if (time >= disengage_request_timeout) {
- for (partid = 1; partid < XP_MAX_PARTITIONS; partid++) {
- if (engaged & (1UL << partid)) {
+ for (partid = XP_MIN_PARTID; partid <= XP_MAX_PARTID;
+ partid++) {
+ if (xpc_partition_engaged(partid)) {
dev_info(xpc_part, "disengage from "
"remote partition %d timed "
"out\n", partid);
@@ -1163,13 +1164,14 @@ xpc_die_disengage(void)
dev_info(xpc_part, "waiting for remote partitions to "
"disengage, timeout in %ld seconds\n",
(disengage_request_timeout - time) /
- sn_rtc_cycles_per_second);
+ xp_rtc_cycles_per_second);
printmsg_time = time +
(XPC_DISENGAGE_PRINTMSG_INTERVAL *
- sn_rtc_cycles_per_second);
+ xp_rtc_cycles_per_second);
}
}
}
+#endif /* CONFIG_IA64 */

/*
@@ -1183,6 +1185,7 @@ xpc_die_disengage(void)
static int
xpc_system_die(struct notifier_block *nb, unsigned long event, void *unused)
{
+#ifdef CONFIG_IA64 /* >>> will deal with notify_die events on X86_64 shortly */
switch (event) {
case DIE_MACHINE_RESTART:
case DIE_MACHINE_HALT:
@@ -1213,7 +1216,7 @@ xpc_system_die(struct notifier_block *nb
xpc_vars->heartbeat_offline = 0;
break;
}
-
+#endif /* CONFIG_IA64 */
return NOTIFY_DONE;
}

@@ -1222,23 +1225,21 @@ int __init
xpc_init(void)
{
int ret;
- partid_t partid;
+ short partid;
struct xpc_partition *part;
pid_t pid;
size_t buf_size;

-
- if (!ia64_platform_is("sn2")) {
+ if (is_shub()) {
+ /*
+ * The ia64-sn architecture supports at most 64 partitions. And
+ * the inability to unregister remote AMOs restricts us further
+ * to only support 64 partitions on this architecture.
+ */
+ if (XP_NPARTITIONS != 64)
+ return -EINVAL;
+ } else if (!is_uv())
return -ENODEV;
- }
-
-
- buf_size = max(XPC_RP_VARS_SIZE,
- XPC_RP_HEADER_SIZE + XP_NASID_MASK_BYTES);
- xpc_remote_copy_buffer = xpc_kmalloc_cacheline_aligned(buf_size,
- GFP_KERNEL, &xpc_remote_copy_buffer_base);
- if (xpc_remote_copy_buffer == NULL)
- return -ENOMEM;

snprintf(xpc_part->bus_id, BUS_ID_SIZE, "part");
snprintf(xpc_chan->bus_id, BUS_ID_SIZE, "chan");
@@ -1253,14 +1254,14 @@ xpc_init(void)
* ENTRIES ARE MEANINGFUL UNTIL AFTER AN ENTRY'S CORRESPONDING
* PARTITION HAS BEEN ACTIVATED.
*/
- for (partid = 1; partid < XP_MAX_PARTITIONS; partid++) {
+ for (partid = XP_MIN_PARTID; partid <= XP_MAX_PARTID; partid++) {
part = &xpc_partitions[partid];

DBUG_ON((u64) part != L1_CACHE_ALIGN((u64) part));

part->act_IRQ_rcvd = 0;
- spin_lock_init(&part->act_lock);
- part->act_state = XPC_P_INACTIVE;
+ spin_lock_init(&part->lock);
+ part->act_state = XPC_P_AS_INACTIVE;
XPC_SET_REASON(part, 0, 0);

init_timer(&part->disengage_request_timer);
@@ -1268,7 +1269,7 @@ xpc_init(void)
xpc_timeout_partition_disengage_request;
part->disengage_request_timer.data = (unsigned long) part;

- part->setup_state = XPC_P_UNSET;
+ part->setup_state = XPC_P_SS_UNSET;
init_waitqueue_head(&part->teardown_wq);
atomic_set(&part->references, 0);
}
@@ -1277,7 +1278,8 @@ xpc_init(void)
* Open up protections for IPI operations (and AMO operations on
* Shub 1.1 systems).
*/
- xpc_allow_IPI_ops();
+ xp_allow_IPI_ops();
+ xp_change_memprotect_shub_wars_1_1(XP_MEMPROT_ALLOW_ALL);

/*
* Interrupts being processed will increment this atomic variable and
@@ -1297,13 +1299,13 @@ xpc_init(void)
dev_err(xpc_part, "can't register ACTIVATE IRQ handler, "
"errno=%d\n", -ret);

- xpc_restrict_IPI_ops();
+ xp_disallow_IPI_ops();
+ xp_change_memprotect_shub_wars_1_1(XP_MEMPROT_DISALLOW_ALL);

if (xpc_sysctl) {
unregister_sysctl_table(xpc_sysctl);
}

- kfree(xpc_remote_copy_buffer_base);
return -EBUSY;
}

@@ -1317,16 +1319,36 @@ xpc_init(void)
dev_err(xpc_part, "could not setup our reserved page\n");

free_irq(SGI_XPC_ACTIVATE, NULL);
- xpc_restrict_IPI_ops();
+ xp_disallow_IPI_ops();
+ xp_change_memprotect_shub_wars_1_1(XP_MEMPROT_DISALLOW_ALL);

if (xpc_sysctl) {
unregister_sysctl_table(xpc_sysctl);
}

- kfree(xpc_remote_copy_buffer_base);
return -EBUSY;
}

+ buf_size = max(XPC_RP_VARS_SIZE,
+ XPC_RP_HEADER_SIZE + xp_sizeof_nasid_mask);
+ xpc_remote_copy_buffer = xpc_kmalloc_cacheline_aligned(buf_size,
+ GFP_KERNEL, &xpc_remote_copy_buffer_base);
+ if (xpc_remote_copy_buffer == NULL) {
+ dev_err(xpc_part, "could not allocate remote copy buffer\n");
+
+ /* indicate to others that our reserved page is uninitialized */
+ xpc_rsvd_page->vars_pa = 0;
+
+ free_irq(SGI_XPC_ACTIVATE, NULL);
+ xp_disallow_IPI_ops();
+ xp_change_memprotect_shub_wars_1_1(XP_MEMPROT_DISALLOW_ALL);
+
+ if (xpc_sysctl) {
+ unregister_sysctl_table(xpc_sysctl);
+ }
+ return -ENOMEM;
+ }
+

/* add ourselves to the reboot_notifier_list */
ret = register_reboot_notifier(&xpc_reboot_notifier);
@@ -1362,7 +1384,8 @@ xpc_init(void)

del_timer_sync(&xpc_hb_timer);
free_irq(SGI_XPC_ACTIVATE, NULL);
- xpc_restrict_IPI_ops();
+ xp_disallow_IPI_ops();
+ xp_change_memprotect_shub_wars_1_1(XP_MEMPROT_DISALLOW_ALL);

if (xpc_sysctl) {
unregister_sysctl_table(xpc_sysctl);
@@ -1385,7 +1408,7 @@ xpc_init(void)
/* mark this new thread as a non-starter */
complete(&xpc_discovery_exited);

- xpc_do_exit(xpcUnloading);
+ xpc_do_exit(xpUnloading);
return -EBUSY;
}

@@ -1404,7 +1427,7 @@ module_init(xpc_init);
void __exit
xpc_exit(void)
{
- xpc_do_exit(xpcUnloading);
+ xpc_do_exit(xpUnloading);
}
module_exit(xpc_exit);

Index: linux-2.6/drivers/misc/xp/xpc_partition.c
===================================================================
--- linux-2.6.orig/drivers/misc/xp/xpc_partition.c 2008-03-25 13:47:59.962929996 -0500
+++ linux-2.6/drivers/misc/xp/xpc_partition.c 2008-03-25 13:51:08.910458712 -0500
@@ -3,7 +3,7 @@
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * Copyright (c) 2004-2006 Silicon Graphics, Inc. All Rights Reserved.
+ * Copyright (c) 2004-2008 Silicon Graphics, Inc. All Rights Reserved.
*/

@@ -22,31 +22,21 @@
#include <linux/cache.h>
#include <linux/mmzone.h>
#include <linux/nodemask.h>
-#include <asm/uncached.h>
-#include <asm/sn/bte.h>
-#include <asm/sn/intr.h>
-#include <asm/sn/sn_sal.h>
-#include <asm/sn/nodepda.h>
-#include <asm/sn/addrs.h>
-#include <asm/sn/xpc.h>
+#include "xpc.h"
+
+#if defined(CONFIG_IA64)
+#define xp_pa(_a) ia64_tpa(_a)
+#elif defined(CONFIG_X86_64)
+#define xp_pa(_a) __pa(_a)
+#else
+#error architecture is NOT supported
+#endif

/* XPC is exiting flag */
int xpc_exiting;

-/* SH_IPI_ACCESS shub register value on startup */
-static u64 xpc_sh1_IPI_access;
-static u64 xpc_sh2_IPI_access0;
-static u64 xpc_sh2_IPI_access1;
-static u64 xpc_sh2_IPI_access2;
-static u64 xpc_sh2_IPI_access3;
-
-
-/* original protection values for each node */
-u64 xpc_prot_vec[MAX_NUMNODES];
-
-
/* this partition's reserved page pointers */
struct xpc_rsvd_page *xpc_rsvd_page;
static u64 *xpc_part_nasids;
@@ -54,9 +44,6 @@ static u64 *xpc_mach_nasids;
struct xpc_vars *xpc_vars;
struct xpc_vars_part *xpc_vars_part;

-static int xp_nasid_mask_bytes; /* actual size in bytes of nasid mask */
-static int xp_nasid_mask_words; /* actual size in words of nasid mask */
-

/*
* For performance reasons, each entry of xpc_partitions[] is cacheline
@@ -64,7 +51,7 @@ static int xp_nasid_mask_words; /* actua
* end so that the last legitimate entry doesn't share its cacheline with
* another variable.
*/
-struct xpc_partition xpc_partitions[XP_MAX_PARTITIONS + 1];
+struct xpc_partition xpc_partitions[XP_NPARTITIONS + 1];

/*
@@ -108,57 +95,54 @@ xpc_kmalloc_cacheline_aligned(size_t siz
static u64
xpc_get_rsvd_page_pa(int nasid)
{
- bte_result_t bte_res;
- s64 status;
- u64 cookie = 0;
u64 rp_pa = nasid; /* seed with nasid */
- u64 len = 0;
+ enum xp_retval ret;
+ u64 cookie = 0;
+ size_t len = 0;
u64 buf = buf;
- u64 buf_len = 0;
+ size_t buf_len = 0;
void *buf_base = NULL;

while (1) {

- status = sn_partition_reserved_page_pa(buf, &cookie, &rp_pa,
- &len);
+ ret = xp_get_partition_rsvd_page_pa(buf, &cookie, &rp_pa, &len);

- dev_dbg(xpc_part, "SAL returned with status=%li, cookie="
- "0x%016lx, address=0x%016lx, len=0x%016lx\n",
- status, cookie, rp_pa, len);
+ dev_dbg(xpc_part, "SAL returned ret=%d cookie=0x%016" U64_ELL
+ "x, address=0x%016" U64_ELL "x len=0x%016lx\n", ret,
+ cookie, rp_pa, len);

- if (status != SALRET_MORE_PASSES) {
+ if (ret != xpNeedMoreInfo) {
break;
}

if (L1_CACHE_ALIGN(len) > buf_len) {
kfree(buf_base);
buf_len = L1_CACHE_ALIGN(len);
- buf = (u64) xpc_kmalloc_cacheline_aligned(buf_len,
+ buf = (u64)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);
- status = SALRET_ERROR;
+ ret = xpNoMemory;
break;
}
}

- bte_res = xp_bte_copy(rp_pa, buf, buf_len,
- (BTE_NOTIFY | BTE_WACQUIRE), NULL);
- if (bte_res != BTE_SUCCESS) {
- dev_dbg(xpc_part, "xp_bte_copy failed %i\n", bte_res);
- status = SALRET_ERROR;
+ ret = xp_remote_memcpy((void *)buf, (void *)rp_pa, buf_len);
+ if (ret != xpSuccess) {
+ dev_dbg(xpc_part, "xp_remote_memcpy failed %d\n", ret);
break;
}
}

kfree(buf_base);

- if (status != SALRET_OK) {
+ if (ret != xpSuccess) {
rp_pa = 0;
}
- dev_dbg(xpc_part, "reserved page at phys address 0x%016lx\n", rp_pa);
+ dev_dbg(xpc_part, "reserved page at phys address 0x%016" U64_ELL "x\n",
+ rp_pa);
return rp_pa;
}

@@ -172,15 +156,21 @@ struct xpc_rsvd_page *
xpc_rsvd_page_init(void)
{
struct xpc_rsvd_page *rp;
- AMO_t *amos_page;
- u64 rp_pa, nasid_array = 0;
- int i, ret;
+ int n_amos;
+ u64 *amos_page;
+ u64 rp_pa;
+ int i;
+ u64 nasid_array = 0;
+ int activate_irq_amos;
+ int engaged_partitions_amos;
+ int disengage_request_amos;
+ int ret;

/* get the local reserved page's address */

preempt_disable();
- rp_pa = xpc_get_rsvd_page_pa(cpuid_to_nasid(smp_processor_id()));
+ 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");
@@ -188,21 +178,14 @@ xpc_rsvd_page_init(void)
}
rp = (struct xpc_rsvd_page *) __va(rp_pa);

- if (rp->partid != sn_partition_id) {
- dev_err(xpc_part, "the reserved page's partid of %d should be "
- "%d\n", rp->partid, sn_partition_id);
- return NULL;
- }
-
rp->version = XPC_RP_VERSION;

/* establish the actual sizes of the nasid masks */
if (rp->SAL_version == 1) {
- /* SAL_version 1 didn't set the nasids_size field */
- rp->nasids_size = 128;
+ /* SAL_version 1 didn't set the SAL_nasids_size field */
+ rp->SAL_nasids_size = 128;
}
- xp_nasid_mask_bytes = rp->nasids_size;
- xp_nasid_mask_words = xp_nasid_mask_bytes / 8;
+ xp_sizeof_nasid_mask = rp->SAL_nasids_size;

/* setup the pointers to the various items in the reserved page */
xpc_part_nasids = XPC_RP_PART_NASIDS(rp);
@@ -211,78 +194,70 @@ xpc_rsvd_page_init(void)
xpc_vars_part = XPC_RP_VARS_PART(rp);

/*
- * Before clearing xpc_vars, see if a page of AMOs had been previously
- * allocated. If not we'll need to allocate one and set permissions
- * so that cross-partition AMOs are allowed.
+ * Before clearing xpc_vars, see if a page (or pages) of AMOs had been
+ * previously allocated. If not we'll need to allocate one (or more)
+ * and set permissions so that cross-partition AMOs are allowed.
*
- * The allocated AMO page needs MCA reporting to remain disabled after
+ * The allocated AMO page(s) need MCA reporting to remain disabled after
* XPC has unloaded. To make this work, we keep a copy of the pointer
- * to this page (i.e., amos_page) in the struct xpc_vars structure,
- * which is pointed to by the reserved page, and re-use that saved copy
- * on subsequent loads of XPC. This AMO page is never freed, and its
- * memory protections are never restricted.
+ * to this page (or pages) in the struct xpc_vars structure (i.e.,
+ * amos_page), which is pointed to by the reserved page, and re-use
+ * that saved copy on subsequent loads of XPC. This AMO page is never
+ * freed, and its memory protections are never restricted.
*/
if ((amos_page = xpc_vars->amos_page) == NULL) {
- amos_page = (AMO_t *) TO_AMO(uncached_alloc_page(0));
+ n_amos = xpc_number_of_amos(XP_NPARTITIONS);
+ amos_page = xp_alloc_amos(n_amos);
if (amos_page == NULL) {
dev_err(xpc_part, "can't allocate page of AMOs\n");
return NULL;
}

/*
- * Open up AMO-R/W to cpu. This is done for Shub 1.1 systems
- * when xpc_allow_IPI_ops() is called via xpc_hb_init().
- */
- if (!enable_shub_wars_1_1()) {
- ret = sn_change_memprotect(ia64_tpa((u64) amos_page),
- PAGE_SIZE, SN_MEMPROT_ACCESS_CLASS_1,
- &nasid_array);
- if (ret != 0) {
- dev_err(xpc_part, "can't change memory "
- "protections\n");
- uncached_free_page(__IA64_UNCACHED_OFFSET |
- TO_PHYS((u64) amos_page));
- return NULL;
- }
- }
- } else if (!IS_AMO_ADDRESS((u64) amos_page)) {
- /*
- * EFI's XPBOOT can also set amos_page in the reserved page,
- * but it happens to leave it as an uncached physical address
- * and we need it to be an uncached virtual, so we'll have to
- * convert it.
+ * Open up AMO-R/W to cpu. This is done for Shub 1.1 systems
+ * when xp_allow_IPI_ops() is called via xpc_init().
*/
- if (!IS_AMO_PHYS_ADDRESS((u64) amos_page)) {
- dev_err(xpc_part, "previously used amos_page address "
- "is bad = 0x%p\n", (void *) amos_page);
+ ret = xp_change_memprotect(xp_pa((u64)amos_page),
+ n_amos * xp_sizeof_amo,
+ XP_MEMPROT_ALLOW_CPU_AMO,
+ &nasid_array);
+ if (ret != xpSuccess) {
+ dev_err(xpc_part, "can't change memory protections\n");
+ xp_free_amos(amos_page, n_amos);
return NULL;
}
- amos_page = (AMO_t *) TO_AMO((u64) amos_page);
}

/* clear xpc_vars */
memset(xpc_vars, 0, sizeof(struct xpc_vars));

xpc_vars->version = XPC_V_VERSION;
- xpc_vars->act_nasid = cpuid_to_nasid(0);
+ xpc_vars->partid = xp_partition_id;
+ xpc_vars->npartitions = XP_NPARTITIONS;
+ xpc_vars->act_nasid = xp_cpu_to_nasid(0);
xpc_vars->act_phys_cpuid = cpu_physical_id(0);
xpc_vars->vars_part_pa = __pa(xpc_vars_part);
- xpc_vars->amos_page_pa = ia64_tpa((u64) amos_page);
+ xpc_vars->amos_page_pa = xp_pa((u64)amos_page);
xpc_vars->amos_page = amos_page; /* save for next load of XPC */

/* clear xpc_vars_part */
- memset((u64 *) xpc_vars_part, 0, sizeof(struct xpc_vars_part) *
- XP_MAX_PARTITIONS);
+ memset((u64 *)xpc_vars_part, 0, sizeof(struct xpc_vars_part) *
+ XP_NPARTITIONS);

/* initialize the activate IRQ related AMO variables */
- for (i = 0; i < xp_nasid_mask_words; i++) {
- (void) xpc_IPI_init(XPC_ACTIVATE_IRQ_AMOS + i);
+ activate_irq_amos = xpc_activate_irq_amos(XP_NPARTITIONS);
+ for (i = 0; i < xp_nasid_mask_words(); i++) {
+ (void)xpc_IPI_init(activate_irq_amos + i);
}

/* initialize the engaged remote partitions related AMO variables */
- (void) xpc_IPI_init(XPC_ENGAGED_PARTITIONS_AMO);
- (void) xpc_IPI_init(XPC_DISENGAGE_REQUEST_AMO);
+ engaged_partitions_amos = xpc_engaged_partitions_amos(XP_NPARTITIONS);
+ disengage_request_amos = xpc_disengage_request_amos(XP_NPARTITIONS);
+ for (i = 0; i < xp_partid_mask_words(XP_NPARTITIONS); i++) {
+ (void)xpc_IPI_init(engaged_partitions_amos + i);
+ (void)xpc_IPI_init(disengage_request_amos + i);
+ }

/* timestamp of when reserved page was setup by XPC */
rp->stamp = CURRENT_TIME;
@@ -298,118 +273,6 @@ xpc_rsvd_page_init(void)

/*
- * Change protections to allow IPI operations (and AMO operations on
- * Shub 1.1 systems).
- */
-void
-xpc_allow_IPI_ops(void)
-{
- int node;
- int nasid;
-
-
- // >>> Change SH_IPI_ACCESS code to use SAL call once it is available.
-
- if (is_shub2()) {
- xpc_sh2_IPI_access0 =
- (u64) HUB_L((u64 *) LOCAL_MMR_ADDR(SH2_IPI_ACCESS0));
- xpc_sh2_IPI_access1 =
- (u64) HUB_L((u64 *) LOCAL_MMR_ADDR(SH2_IPI_ACCESS1));
- xpc_sh2_IPI_access2 =
- (u64) HUB_L((u64 *) LOCAL_MMR_ADDR(SH2_IPI_ACCESS2));
- xpc_sh2_IPI_access3 =
- (u64) HUB_L((u64 *) LOCAL_MMR_ADDR(SH2_IPI_ACCESS3));
-
- for_each_online_node(node) {
- nasid = cnodeid_to_nasid(node);
- HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS0),
- -1UL);
- HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS1),
- -1UL);
- HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS2),
- -1UL);
- HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS3),
- -1UL);
- }
-
- } else {
- xpc_sh1_IPI_access =
- (u64) HUB_L((u64 *) LOCAL_MMR_ADDR(SH1_IPI_ACCESS));
-
- for_each_online_node(node) {
- nasid = cnodeid_to_nasid(node);
- HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH1_IPI_ACCESS),
- -1UL);
-
- /*
- * Since the BIST collides with memory operations on
- * SHUB 1.1 sn_change_memprotect() cannot be used.
- */
- if (enable_shub_wars_1_1()) {
- /* open up everything */
- xpc_prot_vec[node] = (u64) HUB_L((u64 *)
- GLOBAL_MMR_ADDR(nasid,
- SH1_MD_DQLP_MMR_DIR_PRIVEC0));
- HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid,
- SH1_MD_DQLP_MMR_DIR_PRIVEC0),
- -1UL);
- HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid,
- SH1_MD_DQRP_MMR_DIR_PRIVEC0),
- -1UL);
- }
- }
- }
-}
-
-
-/*
- * Restrict protections to disallow IPI operations (and AMO operations on
- * Shub 1.1 systems).
- */
-void
-xpc_restrict_IPI_ops(void)
-{
- int node;
- int nasid;
-
-
- // >>> Change SH_IPI_ACCESS code to use SAL call once it is available.
-
- if (is_shub2()) {
-
- for_each_online_node(node) {
- nasid = cnodeid_to_nasid(node);
- HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS0),
- xpc_sh2_IPI_access0);
- HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS1),
- xpc_sh2_IPI_access1);
- HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS2),
- xpc_sh2_IPI_access2);
- HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS3),
- xpc_sh2_IPI_access3);
- }
-
- } else {
-
- for_each_online_node(node) {
- nasid = cnodeid_to_nasid(node);
- HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH1_IPI_ACCESS),
- xpc_sh1_IPI_access);
-
- if (enable_shub_wars_1_1()) {
- HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid,
- SH1_MD_DQLP_MMR_DIR_PRIVEC0),
- xpc_prot_vec[node]);
- HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid,
- SH1_MD_DQRP_MMR_DIR_PRIVEC0),
- xpc_prot_vec[node]);
- }
- }
- }
-}
-
-
-/*
* At periodic intervals, scan through all active partitions and ensure
* their heartbeat is still active. If not, the partition is deactivated.
*/
@@ -418,51 +281,49 @@ xpc_check_remote_hb(void)
{
struct xpc_vars *remote_vars;
struct xpc_partition *part;
- partid_t partid;
- bte_result_t bres;
+ short partid;
+ enum xp_retval ret;

remote_vars = (struct xpc_vars *) xpc_remote_copy_buffer;

- for (partid = 1; partid < XP_MAX_PARTITIONS; partid++) {
+ for (partid = XP_MIN_PARTID; partid <= XP_MAX_PARTID; partid++) {

if (xpc_exiting) {
break;
}

- if (partid == sn_partition_id) {
+ if (partid == xp_partition_id) {
continue;
}

part = &xpc_partitions[partid];

- if (part->act_state == XPC_P_INACTIVE ||
- part->act_state == XPC_P_DEACTIVATING) {
+ if (part->act_state == XPC_P_AS_INACTIVE ||
+ part->act_state == XPC_P_AS_DEACTIVATING) {
continue;
}

/* pull the remote_hb cache line */
- bres = xp_bte_copy(part->remote_vars_pa,
- (u64) remote_vars,
- XPC_RP_VARS_SIZE,
- (BTE_NOTIFY | BTE_WACQUIRE), NULL);
- if (bres != BTE_SUCCESS) {
- XPC_DEACTIVATE_PARTITION(part,
- xpc_map_bte_errors(bres));
+ ret = xp_remote_memcpy(remote_vars,
+ (void *)part->remote_vars_pa,
+ XPC_RP_VARS_SIZE);
+ if (ret != xpSuccess) {
+ XPC_DEACTIVATE_PARTITION(part, ret);
continue;
}

- dev_dbg(xpc_part, "partid = %d, heartbeat = %ld, last_heartbeat"
- " = %ld, heartbeat_offline = %ld, HB_mask = 0x%lx\n",
- partid, remote_vars->heartbeat, part->last_heartbeat,
- remote_vars->heartbeat_offline,
- remote_vars->heartbeating_to_mask);
+ dev_dbg(xpc_part, "partid = %d, heartbeat = %" U64_ELL "d, "
+ "last_heartbeat = %" U64_ELL "d, heartbeat_offline = %"
+ U64_ELL "d\n", partid,
+ remote_vars->heartbeat, part->last_heartbeat,
+ remote_vars->heartbeat_offline);

if (((remote_vars->heartbeat == part->last_heartbeat) &&
(remote_vars->heartbeat_offline == 0)) ||
- !xpc_hb_allowed(sn_partition_id, remote_vars)) {
+ !xpc_hb_allowed(xp_partition_id, remote_vars)) {

- XPC_DEACTIVATE_PARTITION(part, xpcNoHeartbeat);
+ XPC_DEACTIVATE_PARTITION(part, xpNoHeartbeat);
continue;
}

@@ -478,27 +339,27 @@ xpc_check_remote_hb(void)
* is large enough to contain a copy of their reserved page header and
* part_nasids mask.
*/
-static enum xpc_retval
+static enum xp_retval
xpc_get_remote_rp(int nasid, u64 *discovered_nasids,
struct xpc_rsvd_page *remote_rp, u64 *remote_rp_pa)
{
- int bres, i;
+ int i;
+ 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 xpcNoRsvdPageAddr;
+ return xpNoRsvdPageAddr;
}

/* pull over the reserved page header and part_nasids mask */
- bres = xp_bte_copy(*remote_rp_pa, (u64) remote_rp,
- XPC_RP_HEADER_SIZE + xp_nasid_mask_bytes,
- (BTE_NOTIFY | BTE_WACQUIRE), NULL);
- if (bres != BTE_SUCCESS) {
- return xpc_map_bte_errors(bres);
+ ret = xp_remote_memcpy(remote_rp, (void *)*remote_rp_pa,
+ XPC_RP_HEADER_SIZE + xp_sizeof_nasid_mask);
+ if (ret != xpSuccess) {
+ return ret;
}

@@ -506,30 +367,17 @@ xpc_get_remote_rp(int nasid, u64 *discov
u64 *remote_part_nasids = XPC_RP_PART_NASIDS(remote_rp);

- for (i = 0; i < xp_nasid_mask_words; i++) {
+ for (i = 0; i < xp_nasid_mask_words(); i++) {
discovered_nasids[i] |= remote_part_nasids[i];
}
}

-
- /* check that the partid is for another partition */
-
- if (remote_rp->partid < 1 ||
- remote_rp->partid > (XP_MAX_PARTITIONS - 1)) {
- return xpcInvalidPartid;
- }
-
- if (remote_rp->partid == sn_partition_id) {
- return xpcLocalPartid;
- }
-
-
if (XPC_VERSION_MAJOR(remote_rp->version) !=
XPC_VERSION_MAJOR(XPC_RP_VERSION)) {
- return xpcBadVersion;
+ return xpBadVersion;
}

- return xpcSuccess;
+ return xpSuccess;
}

@@ -539,29 +387,35 @@ xpc_get_remote_rp(int nasid, u64 *discov
* remote_vars points to a buffer that is cacheline aligned for BTE copies and
* assumed to be of size XPC_RP_VARS_SIZE.
*/
-static enum xpc_retval
+static enum xp_retval
xpc_get_remote_vars(u64 remote_vars_pa, struct xpc_vars *remote_vars)
{
- int bres;
-
+ enum xp_retval ret;

if (remote_vars_pa == 0) {
- return xpcVarsNotSet;
+ return xpVarsNotSet;
}

/* pull over the cross partition variables */
- bres = xp_bte_copy(remote_vars_pa, (u64) remote_vars, XPC_RP_VARS_SIZE,
- (BTE_NOTIFY | BTE_WACQUIRE), NULL);
- if (bres != BTE_SUCCESS) {
- return xpc_map_bte_errors(bres);
+ ret = xp_remote_memcpy(remote_vars, (void *)remote_vars_pa,
+ XPC_RP_VARS_SIZE);
+ if (ret != xpSuccess) {
+ return ret;
}

if (XPC_VERSION_MAJOR(remote_vars->version) !=
XPC_VERSION_MAJOR(XPC_V_VERSION)) {
- return xpcBadVersion;
+ return xpBadVersion;
}

- return xpcSuccess;
+ /* check that the partid is for another partition */
+ if (remote_vars->partid < XP_MIN_PARTID ||
+ remote_vars->partid > XP_MAX_PARTID)
+ return xpInvalidPartid;
+ if (remote_vars->partid == xp_partition_id)
+ return xpLocalPartid;
+
+ return xpSuccess;
}

@@ -582,18 +436,23 @@ xpc_update_partition_info(struct xpc_par
part->remote_rp_stamp.tv_sec, part->remote_rp_stamp.tv_nsec);

part->remote_rp_pa = remote_rp_pa;
- dev_dbg(xpc_part, " remote_rp_pa = 0x%016lx\n", part->remote_rp_pa);
+ dev_dbg(xpc_part, " remote_rp_pa = 0x%016" U64_ELL "x\n",
+ part->remote_rp_pa);
+
+ part->remote_npartitions = remote_vars->npartitions;
+ dev_dbg(xpc_part, " remote_npartitions = %d\n",
+ part->remote_npartitions);

part->remote_vars_pa = remote_vars_pa;
- dev_dbg(xpc_part, " remote_vars_pa = 0x%016lx\n",
+ dev_dbg(xpc_part, " remote_vars_pa = 0x%016" U64_ELL "x\n",
part->remote_vars_pa);

part->last_heartbeat = remote_vars->heartbeat;
- dev_dbg(xpc_part, " last_heartbeat = 0x%016lx\n",
+ dev_dbg(xpc_part, " last_heartbeat = 0x%016" U64_ELL "x\n",
part->last_heartbeat);

part->remote_vars_part_pa = remote_vars->vars_part_pa;
- dev_dbg(xpc_part, " remote_vars_part_pa = 0x%016lx\n",
+ dev_dbg(xpc_part, " remote_vars_part_pa = 0x%016" U64_ELL "x\n",
part->remote_vars_part_pa);

part->remote_act_nasid = remote_vars->act_nasid;
@@ -605,7 +464,7 @@ xpc_update_partition_info(struct xpc_par
part->remote_act_phys_cpuid);

part->remote_amos_page_pa = remote_vars->amos_page_pa;
- dev_dbg(xpc_part, " remote_amos_page_pa = 0x%lx\n",
+ dev_dbg(xpc_part, " remote_amos_page_pa = 0x%" U64_ELL "x\n",
part->remote_amos_page_pa);

part->remote_vars_version = remote_vars->version;
@@ -639,9 +498,9 @@ xpc_identify_act_IRQ_req(int nasid)
int reactivate = 0;
int stamp_diff;
struct timespec remote_rp_stamp = { 0, 0 };
- partid_t partid;
+ short partid;
struct xpc_partition *part;
- enum xpc_retval ret;
+ enum xp_retval ret;

/* pull over the reserved page structure */
@@ -649,7 +508,7 @@ xpc_identify_act_IRQ_req(int nasid)
remote_rp = (struct xpc_rsvd_page *) xpc_remote_copy_buffer;

ret = xpc_get_remote_rp(nasid, NULL, remote_rp, &remote_rp_pa);
- if (ret != xpcSuccess) {
+ if (ret != xpSuccess) {
dev_warn(xpc_part, "unable to get reserved page from nasid %d, "
"which sent interrupt, reason=%d\n", nasid, ret);
return;
@@ -660,40 +519,36 @@ xpc_identify_act_IRQ_req(int nasid)
if (XPC_SUPPORTS_RP_STAMP(remote_rp_version)) {
remote_rp_stamp = remote_rp->stamp;
}
- partid = remote_rp->partid;
- part = &xpc_partitions[partid];
-

/* pull over the cross partition variables */

remote_vars = (struct xpc_vars *) xpc_remote_copy_buffer;

ret = xpc_get_remote_vars(remote_vars_pa, remote_vars);
- if (ret != xpcSuccess) {
-
+ if (ret != xpSuccess) {
dev_warn(xpc_part, "unable to get XPC variables from nasid %d, "
"which sent interrupt, reason=%d\n", nasid, ret);
-
- XPC_DEACTIVATE_PARTITION(part, ret);
return;
}

+ partid = remote_vars->partid;
+ part = &xpc_partitions[partid];

part->act_IRQ_rcvd++;

dev_dbg(xpc_part, "partid for nasid %d is %d; IRQs = %d; HB = "
- "%ld:0x%lx\n", (int) nasid, (int) partid, part->act_IRQ_rcvd,
- remote_vars->heartbeat, remote_vars->heartbeating_to_mask);
+ "%" U64_ELL "d\n", (int) nasid, (int) partid,
+ part->act_IRQ_rcvd, remote_vars->heartbeat);

if (xpc_partition_disengaged(part) &&
- part->act_state == XPC_P_INACTIVE) {
+ part->act_state == XPC_P_AS_INACTIVE) {

xpc_update_partition_info(part, remote_rp_version,
&remote_rp_stamp, remote_rp_pa,
remote_vars_pa, remote_vars);

if (XPC_SUPPORTS_DISENGAGE_REQUEST(part->remote_vars_version)) {
- if (xpc_partition_disengage_requested(1UL << partid)) {
+ if (xpc_partition_disengage_requested(partid)) {
/*
* Other side is waiting on us to disengage,
* even though we already have.
@@ -702,7 +557,7 @@ xpc_identify_act_IRQ_req(int nasid)
}
} else {
/* other side doesn't support disengage requests */
- xpc_clear_partition_disengage_request(1UL << partid);
+ xpc_clear_partition_disengage_request(partid);
}

xpc_activate_partition(part);
@@ -722,7 +577,7 @@ xpc_identify_act_IRQ_req(int nasid)
/* see if the other side rebooted */
if (part->remote_amos_page_pa ==
remote_vars->amos_page_pa &&
- xpc_hb_allowed(sn_partition_id,
+ xpc_hb_allowed(xp_partition_id,
remote_vars)) {
/* doesn't look that way, so ignore the IPI */
return;
@@ -738,7 +593,7 @@ xpc_identify_act_IRQ_req(int nasid)
&remote_rp_stamp, remote_rp_pa,
remote_vars_pa, remote_vars);
part->reactivate_nasid = nasid;
- XPC_DEACTIVATE_PARTITION(part, xpcReactivating);
+ XPC_DEACTIVATE_PARTITION(part, xpReactivating);
return;
}

@@ -752,8 +607,8 @@ xpc_identify_act_IRQ_req(int nasid)
* disengage request, but the new one doesn't.
*/

- xpc_clear_partition_engaged(1UL << partid);
- xpc_clear_partition_disengage_request(1UL << partid);
+ xpc_clear_partition_engaged(partid);
+ xpc_clear_partition_disengage_request(partid);

xpc_update_partition_info(part, remote_rp_version,
&remote_rp_stamp, remote_rp_pa,
@@ -773,9 +628,8 @@ xpc_identify_act_IRQ_req(int nasid)
* the disengage request, as does the new one.
*/

- DBUG_ON(xpc_partition_engaged(1UL << partid));
- DBUG_ON(xpc_partition_disengage_requested(1UL <<
- partid));
+ DBUG_ON(xpc_partition_engaged(partid));
+ DBUG_ON(xpc_partition_disengage_requested(partid));

xpc_update_partition_info(part, remote_rp_version,
&remote_rp_stamp, remote_rp_pa,
@@ -792,11 +646,11 @@ xpc_identify_act_IRQ_req(int nasid)

if (reactivate) {
part->reactivate_nasid = nasid;
- XPC_DEACTIVATE_PARTITION(part, xpcReactivating);
+ XPC_DEACTIVATE_PARTITION(part, xpReactivating);

} else if (XPC_SUPPORTS_DISENGAGE_REQUEST(part->remote_vars_version) &&
- xpc_partition_disengage_requested(1UL << partid)) {
- XPC_DEACTIVATE_PARTITION(part, xpcOtherGoingDown);
+ xpc_partition_disengage_requested(partid)) {
+ XPC_DEACTIVATE_PARTITION(part, xpOtherGoingDown);
}
}

@@ -811,50 +665,54 @@ xpc_identify_act_IRQ_req(int nasid)
int
xpc_identify_act_IRQ_sender(void)
{
- int word, bit;
+ enum xp_retval ret;
+ int w_index, b_index;
+ u64 *amo_va;
u64 nasid_mask;
u64 nasid; /* remote nasid */
int n_IRQs_detected = 0;
- AMO_t *act_amos;
-

- act_amos = xpc_vars->amos_page + XPC_ACTIVATE_IRQ_AMOS;
+ amo_va = (u64 *)((u64)xpc_vars->amos_page +
+ xpc_activate_irq_amos(xpc_vars->npartitions) *
+ xp_sizeof_amo);

- /* scan through act AMO variable looking for non-zero entries */
- for (word = 0; word < xp_nasid_mask_words; word++) {
+ /* scan through activation AMO variables looking for non-zero entries */
+ for (w_index = 0; w_index < xp_nasid_mask_words(); w_index++) {

if (xpc_exiting) {
break;
}

- nasid_mask = xpc_IPI_receive(&act_amos[word]);
+ ret = xp_get_amo(amo_va, XP_AMO_CLEAR, &nasid_mask);
+ BUG_ON(ret != xpSuccess); /* should never happen */
+ amo_va = (u64 *)((u64)amo_va + xp_sizeof_amo); /* next amo */
if (nasid_mask == 0) {
/* no IRQs from nasids in this variable */
continue;
}

- dev_dbg(xpc_part, "AMO[%d] gave back 0x%lx\n", word,
- nasid_mask);
+ dev_dbg(xpc_part, "AMO[%d] gave back 0x%" U64_ELL "x\n",
+ w_index, nasid_mask);

/*
- * If this nasid has been added to the machine since
- * our partition was reset, this will retain the
- * remote nasid in our reserved pages machine mask.
+ * If any nasid(s) in mask have been added to the machine
+ * since our partition was reset, this will retain the
+ * remote nasid(s) in our reserved pages machine mask.
* This is used in the event of module reload.
*/
- xpc_mach_nasids[word] |= nasid_mask;
+ xpc_mach_nasids[w_index] |= nasid_mask;

/* locate the nasid(s) which sent interrupts */

- for (bit = 0; bit < (8 * sizeof(u64)); bit++) {
- if (nasid_mask & (1UL << bit)) {
+ for (b_index = 0; b_index < BITS_PER_LONG; b_index++) {
+ if (nasid_mask & (1UL << b_index)) {
n_IRQs_detected++;
- nasid = XPC_NASID_FROM_W_B(word, bit);
- dev_dbg(xpc_part, "interrupt from nasid %ld\n",
- nasid);
+ nasid = (w_index * BITS_PER_LONG + b_index) * 2;
+ dev_dbg(xpc_part, "interrupt from nasid %"
+ U64_ELL "d\n", nasid);
xpc_identify_act_IRQ_req(nasid);
}
}
@@ -870,11 +728,11 @@ xpc_identify_act_IRQ_sender(void)
int
xpc_partition_disengaged(struct xpc_partition *part)
{
- partid_t partid = XPC_PARTID(part);
+ short partid = XPC_PARTID(part);
int disengaged;

- disengaged = (xpc_partition_engaged(1UL << partid) == 0);
+ disengaged = (xpc_partition_engaged(partid) == 0);
if (part->disengage_request_timeout) {
if (!disengaged) {
if (jiffies < part->disengage_request_timeout) {
@@ -890,7 +748,7 @@ xpc_partition_disengaged(struct xpc_part
dev_info(xpc_part, "disengage from remote partition %d "
"timed out\n", partid);
xpc_disengage_request_timedout = 1;
- xpc_clear_partition_engaged(1UL << partid);
+ xpc_clear_partition_engaged(partid);
disengaged = 1;
}
part->disengage_request_timeout = 0;
@@ -901,9 +759,9 @@ xpc_partition_disengaged(struct xpc_part
disengage_request_timer);
}

- DBUG_ON(part->act_state != XPC_P_DEACTIVATING &&
- part->act_state != XPC_P_INACTIVE);
- if (part->act_state != XPC_P_INACTIVE) {
+ 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);
}

@@ -918,24 +776,24 @@ xpc_partition_disengaged(struct xpc_part
/*
* Mark specified partition as active.
*/
-enum xpc_retval
+enum xp_retval
xpc_mark_partition_active(struct xpc_partition *part)
{
unsigned long irq_flags;
- enum xpc_retval ret;
+ 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_ACTIVATING) {
- part->act_state = XPC_P_ACTIVE;
- ret = xpcSuccess;
+ spin_lock_irqsave(&part->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 == xpcSuccess);
+ DBUG_ON(part->reason == xpSuccess);
ret = part->reason;
}
- spin_unlock_irqrestore(&part->act_lock, irq_flags);
+ spin_unlock_irqrestore(&part->lock, irq_flags);

return ret;
}
@@ -946,35 +804,35 @@ xpc_mark_partition_active(struct xpc_par
*/
void
xpc_deactivate_partition(const int line, struct xpc_partition *part,
- enum xpc_retval reason)
+ enum xp_retval reason)
{
unsigned long irq_flags;

- spin_lock_irqsave(&part->act_lock, irq_flags);
+ spin_lock_irqsave(&part->lock, irq_flags);

- if (part->act_state == XPC_P_INACTIVE) {
+ if (part->act_state == XPC_P_AS_INACTIVE) {
XPC_SET_REASON(part, reason, line);
- spin_unlock_irqrestore(&part->act_lock, irq_flags);
- if (reason == xpcReactivating) {
+ spin_unlock_irqrestore(&part->lock, irq_flags);
+ if (reason == xpReactivating) {
/* we interrupt ourselves to reactivate partition */
xpc_IPI_send_reactivate(part);
}
return;
}
- if (part->act_state == XPC_P_DEACTIVATING) {
- if ((part->reason == xpcUnloading && reason != xpcUnloading) ||
- reason == xpcReactivating) {
+ 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);
+ spin_unlock_irqrestore(&part->lock, irq_flags);
return;
}

- part->act_state = XPC_P_DEACTIVATING;
+ part->act_state = XPC_P_AS_DEACTIVATING;
XPC_SET_REASON(part, reason, line);

- spin_unlock_irqrestore(&part->act_lock, irq_flags);
+ spin_unlock_irqrestore(&part->lock, irq_flags);

if (XPC_SUPPORTS_DISENGAGE_REQUEST(part->remote_vars_version)) {
xpc_request_partition_disengage(part);
@@ -1007,14 +865,60 @@ xpc_mark_partition_inactive(struct xpc_p
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_INACTIVE;
- spin_unlock_irqrestore(&part->act_lock, irq_flags);
+ spin_lock_irqsave(&part->lock, irq_flags);
+ part->act_state = XPC_P_AS_INACTIVE;
+ spin_unlock_irqrestore(&part->lock, irq_flags);
part->remote_rp_pa = 0;
}

/*
+ * Register the remote partition's AMOs so any errors within that address
+ * range can be handled and cleaned up should the remote partition go down.
+ */
+enum xp_retval
+xpc_register_remote_amos(struct xpc_partition *part)
+{
+ unsigned long irq_flags;
+ size_t len;
+ enum xp_retval ret;
+
+ if (part->flags & XPC_P_RAMOSREGISTERED)
+ return xpSuccess;
+
+ len = xpc_number_of_amos(part->remote_npartitions) * xp_sizeof_amo;
+ ret = xp_register_remote_amos(part->remote_amos_page_pa, len);
+ if (ret == xpSuccess) {
+ spin_lock_irqsave(&part->lock, irq_flags);
+ part->flags |= XPC_P_RAMOSREGISTERED;
+ spin_unlock_irqrestore(&part->lock, irq_flags);
+ }
+ return ret;
+}
+
+void
+xpc_unregister_remote_amos(struct xpc_partition *part)
+{
+ unsigned long irq_flags;
+ size_t len;
+ enum xp_retval ret;
+
+ if (!(part->flags & XPC_P_RAMOSREGISTERED))
+ return;
+
+ len = xpc_number_of_amos(part->remote_npartitions) * xp_sizeof_amo;
+ ret = xp_unregister_remote_amos(part->remote_amos_page_pa, len);
+ if (ret != xpSuccess)
+ dev_warn(xpc_part, "failed to unregister remote AMOs for "
+ "partition %d, ret=%d\n", XPC_PARTID(part), ret);
+
+ spin_lock_irqsave(&part->lock, irq_flags);
+ part->flags &= ~XPC_P_RAMOSREGISTERED;
+ spin_unlock_irqrestore(&part->lock, irq_flags);
+}
+
+
+/*
* 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.
@@ -1036,23 +940,23 @@ xpc_discovery(void)
int max_regions;
int nasid;
struct xpc_rsvd_page *rp;
- partid_t partid;
+ short partid;
struct xpc_partition *part;
u64 *discovered_nasids;
- enum xpc_retval ret;
+ enum xp_retval ret;

remote_rp = xpc_kmalloc_cacheline_aligned(XPC_RP_HEADER_SIZE +
- xp_nasid_mask_bytes,
- GFP_KERNEL, &remote_rp_base);
+ xp_sizeof_nasid_mask,
+ GFP_KERNEL, &remote_rp_base);
if (remote_rp == NULL) {
return;
}
remote_vars = (struct xpc_vars *) remote_rp;

- discovered_nasids = kzalloc(sizeof(u64) * xp_nasid_mask_words,
- GFP_KERNEL);
+ discovered_nasids = kzalloc(sizeof(u64) * xp_nasid_mask_words(),
+ GFP_KERNEL);
if (discovered_nasids == NULL) {
kfree(remote_rp_base);
return;
@@ -1066,7 +970,7 @@ xpc_discovery(void)
* protection is in regards to memory, IOI and IPI.
*/
max_regions = 64;
- region_size = sn_region_size;
+ region_size = xp_region_size;

switch (region_size) {
case 128:
@@ -1124,61 +1028,50 @@ xpc_discovery(void)

ret = xpc_get_remote_rp(nasid, discovered_nasids,
remote_rp, &remote_rp_pa);
- if (ret != xpcSuccess) {
+ if (ret != xpSuccess) {
dev_dbg(xpc_part, "unable to get reserved page "
"from nasid %d, reason=%d\n", nasid,
ret);
-
- if (ret == xpcLocalPartid) {
- break;
- }
continue;
}

remote_vars_pa = remote_rp->vars_pa;

- partid = remote_rp->partid;
- part = &xpc_partitions[partid];
-
-
/* pull over the cross partition variables */

ret = xpc_get_remote_vars(remote_vars_pa, remote_vars);
- if (ret != xpcSuccess) {
+ if (ret != xpSuccess) {
dev_dbg(xpc_part, "unable to get XPC variables "
"from nasid %d, reason=%d\n", nasid,
ret);
-
- XPC_DEACTIVATE_PARTITION(part, ret);
+ if (ret == xpLocalPartid)
+ break;
continue;
}

- if (part->act_state != XPC_P_INACTIVE) {
+ partid = remote_vars->partid;
+ part = &xpc_partitions[partid];
+
+ if (part->act_state != XPC_P_AS_INACTIVE) {
dev_dbg(xpc_part, "partition %d on nasid %d is "
"already activating\n", partid, nasid);
break;
}

/*
- * Register the remote partition's AMOs with SAL so it
- * can handle and cleanup errors within that address
- * range should the remote partition go down. We don't
- * unregister this range because it is difficult to
- * tell when outstanding writes to the remote partition
- * are finished and thus when it is thus safe to
- * unregister. This should not result in wasted space
- * in the SAL xp_addr_region table because we should
- * get the same page for remote_act_amos_pa after
- * module reloads and system reboots.
+ * Register the remote partition's AMOs so any errors
+ * within that address range can be handled and
+ * cleaned up should the remote partition go down.
*/
- if (sn_register_xp_addr_region(
- remote_vars->amos_page_pa,
- PAGE_SIZE, 1) < 0) {
- dev_dbg(xpc_part, "partition %d failed to "
- "register xp_addr region 0x%016lx\n",
- partid, remote_vars->amos_page_pa);
+ part->remote_npartitions = remote_vars->npartitions;
+ part->remote_amos_page_pa = remote_vars->amos_page_pa;
+ ret = xpc_register_remote_amos(part);
+ if (ret != xpSuccess) {
+ dev_warn(xpc_part, "xpc_discovery() failed to "
+ "register remote AMOs for partition %d,"
+ "ret=%d\n", partid, ret);

- XPC_SET_REASON(part, xpcPhysAddrRegFailed,
+ XPC_SET_REASON(part, xpPhysAddrRegFailed,
__LINE__);
break;
}
@@ -1188,8 +1081,8 @@ xpc_discovery(void)
* Send an interrupt to that nasid to notify
* it that we are ready to begin activation.
*/
- dev_dbg(xpc_part, "sending an interrupt to AMO 0x%lx, "
- "nasid %d, phys_cpuid 0x%x\n",
+ dev_dbg(xpc_part, "sending an interrupt to AMO 0x%"
+ U64_ELL "x, nasid %d, phys_cpuid 0x%x\n",
remote_vars->amos_page_pa,
remote_vars->act_nasid,
remote_vars->act_phys_cpuid);
@@ -1214,26 +1107,23 @@ xpc_discovery(void)
* Given a partid, get the nasids owned by that partition from the
* remote partition's reserved page.
*/
-enum xpc_retval
-xpc_initiate_partid_to_nasids(partid_t partid, void *nasid_mask)
+enum xp_retval
+xpc_initiate_partid_to_nasids(short partid, void *nasid_mask)
{
struct xpc_partition *part;
u64 part_nasid_pa;
- int bte_res;

part = &xpc_partitions[partid];
if (part->remote_rp_pa == 0) {
- return xpcPartitionDown;
+ return xpPartitionDown;
}

- memset(nasid_mask, 0, XP_NASID_MASK_BYTES);
+ memset(nasid_mask, 0, xp_sizeof_nasid_mask);

part_nasid_pa = (u64) XPC_RP_PART_NASIDS(part->remote_rp_pa);

- bte_res = xp_bte_copy(part_nasid_pa, (u64) nasid_mask,
- xp_nasid_mask_bytes, (BTE_NOTIFY | BTE_WACQUIRE), NULL);
-
- return xpc_map_bte_errors(bte_res);
+ return xp_remote_memcpy(nasid_mask, (void *)part_nasid_pa,
+ xp_sizeof_nasid_mask);
}

Index: linux-2.6/drivers/misc/xp/xpnet.c
===================================================================
--- linux-2.6.orig/drivers/misc/xp/xpnet.c 2008-03-25 13:47:59.962929996 -0500
+++ linux-2.6/drivers/misc/xp/xpnet.c 2008-03-25 13:51:08.930461203 -0500
@@ -3,7 +3,7 @@
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * Copyright (C) 1999,2001-2005 Silicon Graphics, Inc. All rights reserved.
+ * Copyright (C) 1999,2001-2008 Silicon Graphics, Inc. All rights reserved.
*/

@@ -33,12 +33,9 @@
#include <linux/mii.h>
#include <linux/smp.h>
#include <linux/string.h>
-#include <asm/sn/bte.h>
-#include <asm/sn/io.h>
-#include <asm/sn/sn_sal.h>
#include <asm/types.h>
#include <asm/atomic.h>
-#include <asm/sn/xp.h>
+#include "xp.h"

/*
@@ -110,7 +107,6 @@ struct xpnet_message {
* then be released.
*/
struct xpnet_pending_msg {
- struct list_head free_list;
struct sk_buff *skb;
atomic_t use_count;
};
@@ -126,7 +122,7 @@ 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 u64 xpnet_broadcast_partitions;
+static u64 xpnet_broadcast_partitions[BITS_TO_LONGS(XP_NPARTITIONS)];
/* protect above */
static DEFINE_SPINLOCK(xpnet_broadcast_lock);

@@ -147,17 +143,14 @@ static DEFINE_SPINLOCK(xpnet_broadcast_l

/*
- * The partition id is encapsulated in the MAC address. The following
- * define locates the octet the partid is in.
+ * The partid is encapsulated in the MAC address beginning in the following
+ * octet.
*/
-#define XPNET_PARTID_OCTET 1
-#define XPNET_LICENSE_OCTET 2
+#define XPNET_PARTID_OCTET 2 /* consists of 2 octets total */

-/*
- * Define the XPNET debug device structure that is to be used with dev_dbg(),
- * dev_err(), dev_warn(), and dev_info().
- */
+/* Define the XPNET debug device structures to be used with dev_dbg() et al */
+
struct device_driver xpnet_dbg_name = {
.name = "xpnet"
};
@@ -173,10 +166,10 @@ struct device *xpnet = &xpnet_dbg_subnam
* Packet was recevied by XPC and forwarded to us.
*/
static void
-xpnet_receive(partid_t partid, int channel, struct xpnet_message *msg)
+xpnet_receive(short partid, int channel, struct xpnet_message *msg)
{
struct sk_buff *skb;
- bte_result_t bret;
+ enum xp_retval ret;
struct xpnet_dev_private *priv =
(struct xpnet_dev_private *) xpnet_device->priv;

@@ -191,8 +184,8 @@ xpnet_receive(partid_t partid, int chann

return;
}
- dev_dbg(xpnet, "received 0x%lx, %d, %d, %d\n", msg->buf_pa, msg->size,
- msg->leadin_ignore, msg->tailout_ignore);
+ dev_dbg(xpnet, "received 0x%" U64_ELL "x, %d, %d, %d\n", msg->buf_pa,
+ msg->size, msg->leadin_ignore, msg->tailout_ignore);

/* reserve an extra cache line */
@@ -239,19 +232,21 @@ xpnet_receive(partid_t partid, int chann
(void *)__pa((u64)skb->data & ~(L1_CACHE_BYTES - 1)),
msg->size);

- bret = bte_copy(msg->buf_pa,
- __pa((u64)skb->data & ~(L1_CACHE_BYTES - 1)),
- msg->size, (BTE_NOTIFY | BTE_WACQUIRE), NULL);
-
- if (bret != BTE_SUCCESS) {
- // >>> Need better way of cleaning skb. Currently skb
- // >>> appears in_use and we can't just call
- // >>> dev_kfree_skb.
- dev_err(xpnet, "bte_copy(0x%p, 0x%p, 0x%hx) returned "
- "error=0x%x\n", (void *)msg->buf_pa,
+ ret = xp_remote_memcpy((void *)((u64)skb->data &
+ ~(L1_CACHE_BYTES - 1)),
+ (void *)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%hx) "
+ "returned error=0x%x\n",
(void *)__pa((u64)skb->data &
- ~(L1_CACHE_BYTES - 1)),
- msg->size, bret);
+ ~(L1_CACHE_BYTES - 1)),
+ (void *)msg->buf_pa, msg->size, ret);

xpc_received(partid, channel, (void *) msg);

@@ -290,50 +285,43 @@ xpnet_receive(partid_t partid, int chann
* state or message reception on a connection.
*/
static void
-xpnet_connection_activity(enum xpc_retval reason, partid_t partid, int channel,
+xpnet_connection_activity(enum xp_retval reason, short partid, int channel,
void *data, void *key)
{
- long bp;
-
-
- DBUG_ON(partid <= 0 || partid >= XP_MAX_PARTITIONS);
+ DBUG_ON(partid < XP_MIN_PARTID || partid > XP_MAX_PARTID);
DBUG_ON(channel != XPC_NET_CHANNEL);

switch(reason) {
- case xpcMsgReceived: /* message received */
+ case xpMsgReceived: /* message received */
DBUG_ON(data == NULL);

xpnet_receive(partid, channel, (struct xpnet_message *) data);
break;

- case xpcConnected: /* connection completed to a partition */
+ case xpConnected: /* connection completed to a partition */
spin_lock_bh(&xpnet_broadcast_lock);
- xpnet_broadcast_partitions |= 1UL << (partid -1 );
- bp = xpnet_broadcast_partitions;
+ __set_bit(partid, xpnet_broadcast_partitions);
spin_unlock_bh(&xpnet_broadcast_lock);

netif_carrier_on(xpnet_device);

- dev_dbg(xpnet, "%s connection created to partition %d; "
- "xpnet_broadcast_partitions=0x%lx\n",
- xpnet_device->name, partid, bp);
+ dev_dbg(xpnet, "%s connected to partition %d\n",
+ xpnet_device->name, partid);
break;

default:
spin_lock_bh(&xpnet_broadcast_lock);
- xpnet_broadcast_partitions &= ~(1UL << (partid -1 ));
- bp = xpnet_broadcast_partitions;
+ __clear_bit(partid, xpnet_broadcast_partitions);
spin_unlock_bh(&xpnet_broadcast_lock);

- if (bp == 0) {
+ if (bitmap_empty((unsigned long *)xpnet_broadcast_partitions,
+ XP_NPARTITIONS)) {
netif_carrier_off(xpnet_device);
}

- dev_dbg(xpnet, "%s disconnected from partition %d; "
- "xpnet_broadcast_partitions=0x%lx\n",
- xpnet_device->name, partid, bp);
+ dev_dbg(xpnet, "%s disconnected from partition %d\n",
+ xpnet_device->name, partid);
break;
-
}
}

@@ -341,18 +329,18 @@ xpnet_connection_activity(enum xpc_retva
static int
xpnet_dev_open(struct net_device *dev)
{
- enum xpc_retval ret;
+ 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,
- XPNET_MSG_SIZE, XPNET_MSG_NENTRIES, XPNET_MAX_KTHREADS,
- XPNET_MAX_IDLE_KTHREADS);
+ dev_dbg(xpnet, "calling xpc_connect(%d, 0x%p, NULL, %" U64_ELL "d, %"
+ U64_ELL "d, %" U64_ELL "d, %" U64_ELL "d)\n", XPC_NET_CHANNEL,
+ xpnet_connection_activity, XPNET_MSG_SIZE, XPNET_MSG_NENTRIES,
+ XPNET_MAX_KTHREADS, 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 != xpcSuccess) {
+ if (ret != xpSuccess) {
dev_err(xpnet, "ifconfig up of %s failed on XPC connect, "
"ret=%d\n", dev->name, ret);

@@ -425,7 +413,7 @@ xpnet_dev_get_stats(struct net_device *d
* release the skb and then release our pending message structure.
*/
static void
-xpnet_send_completed(enum xpc_retval reason, partid_t partid, int channel,
+xpnet_send_completed(enum xp_retval reason, short partid, int channel,
void *__qm)
{
struct xpnet_pending_msg *queued_msg =
@@ -447,30 +435,67 @@ xpnet_send_completed(enum xpc_retval rea
}

+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)
+{
+ struct xpnet_message *msg;
+ enum xp_retval ret;
+
+
+ ret = xpc_allocate(dest_partid, XPC_NET_CHANNEL, XPC_NOWAIT,
+ (void **)&msg);
+ if (unlikely(ret != xpSuccess))
+ return;
+
+ 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);
+ } 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 = __pa(start_addr);
+
+ dev_dbg(xpnet, "sending XPC message to %d:%d\n"
+ KERN_DEBUG "msg->buf_pa=0x%" U64_ELL "x, 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, msg,
+ 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 partition_id. If the destination partition id word
- * is 0xff, this packet is to broadcast to all partitions.
+ * destination partid. If the destination partid octets are 0xffff,
+ * this packet is to broadcast to all connected partitions.
*/
static int
xpnet_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct xpnet_pending_msg *queued_msg;
- enum xpc_retval ret;
- struct xpnet_message *msg;
u64 start_addr, end_addr;
- long dp;
- u8 second_mac_octet;
- partid_t dest_partid;
- struct xpnet_dev_private *priv;
- u16 embedded_bytes;
-
-
- priv = (struct xpnet_dev_private *) dev->priv;
+ short dest_partid;
+ struct xpnet_dev_private *priv = (struct xpnet_dev_private *)dev->priv;
+ u16 embedded_bytes = 0;

dev_dbg(xpnet, ">skb->head=0x%p skb->data=0x%p skb->tail=0x%p "
@@ -478,6 +503,11 @@ xpnet_dev_hard_start_xmit(struct sk_buff
(void *)skb->data, skb_tail_pointer(skb), skb_end_pointer(skb),
skb->len);

+ /* >>> What does 0x33 represent? ifconfig makes it happen */
+ if (skb->data[0] == 0x33) {
+ dev_kfree_skb(skb);
+ return 0; /* nothing needed to be done */
+ }

/*
* The xpnet_pending_msg tracks how many outstanding
@@ -500,7 +530,6 @@ xpnet_dev_hard_start_xmit(struct sk_buff
end_addr = L1_CACHE_ALIGN((u64)skb_tail_pointer(skb));

/* calculate how many bytes to embed in the XPC message */
- embedded_bytes = 0;
if (unlikely(skb->len <= XPNET_MSG_DATA_MAX)) {
/* skb->data does fit so embed */
embedded_bytes = skb->len;
@@ -517,89 +546,27 @@ xpnet_dev_hard_start_xmit(struct sk_buff
atomic_set(&queued_msg->use_count, 1);
queued_msg->skb = skb;

-
- second_mac_octet = skb->data[XPNET_PARTID_OCTET];
- if (second_mac_octet == 0xff) {
+ if (skb->data[0] == 0xff) {
/* we are being asked to broadcast to all partitions */
- dp = xpnet_broadcast_partitions;
- } else if (second_mac_octet != 0) {
- dp = xpnet_broadcast_partitions &
- (1UL << (second_mac_octet - 1));
- } else {
- /* 0 is an invalid partid. Ignore */
- dp = 0;
- }
- dev_dbg(xpnet, "destination Partitions mask (dp) = 0x%lx\n", dp);
-
- /*
- * If we wanted to allow promiscuous mode to work like an
- * unswitched network, this would be a good point to OR in a
- * mask of partitions which should be receiving all packets.
- */
-
- /*
- * Main send loop.
- */
- for (dest_partid = 1; dp && dest_partid < XP_MAX_PARTITIONS;
- dest_partid++) {
-
-
- if (!(dp & (1UL << (dest_partid - 1)))) {
- /* not destined for this partition */
- continue;
- }
-
- /* remove this partition from the destinations mask */
- dp &= ~(1UL << (dest_partid - 1));
-
-
- /* found a partition to send to */
-
- ret = xpc_allocate(dest_partid, XPC_NET_CHANNEL,
- XPC_NOWAIT, (void **)&msg);
- if (unlikely(ret != xpcSuccess)) {
- continue;
+ for_each_bit(dest_partid,
+ (unsigned long *)xpnet_broadcast_partitions,
+ XP_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;

- 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);
- } 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 = __pa(start_addr);
-
- dev_dbg(xpnet, "sending XPC message to %d:%d\n"
- KERN_DEBUG "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, msg,
- xpnet_send_completed, queued_msg);
- if (unlikely(ret != xpcSuccess)) {
- atomic_dec(&queued_msg->use_count);
- continue;
+ if (dest_partid >= XP_MIN_PARTID &&
+ dest_partid <= XP_MAX_PARTID &&
+ test_bit(dest_partid, xpnet_broadcast_partitions) != 0) {
+ xpnet_send(skb, queued_msg, start_addr, end_addr,
+ embedded_bytes, dest_partid);
}
-
}

if (atomic_dec_return(&queued_msg->use_count) == 0) {
- dev_dbg(xpnet, "no partitions to receive packet destined for "
- "%d\n", dest_partid);
-
-
dev_kfree_skb(skb);
kfree(queued_msg);
}
@@ -615,7 +582,7 @@ xpnet_dev_hard_start_xmit(struct sk_buff
* Deal with transmit timeouts coming from the network layer.
*/
static void
-xpnet_dev_tx_timeout (struct net_device *dev)
+xpnet_dev_tx_timeout(struct net_device *dev)
{
struct xpnet_dev_private *priv;

@@ -630,12 +597,11 @@ xpnet_dev_tx_timeout (struct net_device
static int __init
xpnet_init(void)
{
- int i;
- u32 license_num;
+ short partid;
int result = -ENOMEM;

- if (!ia64_platform_is("sn2")) {
+ if (!is_shub() && !is_uv()) {
return -ENODEV;
}

@@ -667,14 +633,12 @@ xpnet_init(void)
* MAC addresses. We chose the first octet of the MAC to be unlikely
* to collide with any vendor's officially issued MAC.
*/
- xpnet_device->dev_addr[0] = 0xfe;
- xpnet_device->dev_addr[XPNET_PARTID_OCTET] = sn_partition_id;
- license_num = sn_partition_serial_number_val();
- for (i = 3; i >= 0; i--) {
- xpnet_device->dev_addr[XPNET_LICENSE_OCTET + i] =
- license_num & 0xff;
- license_num = license_num >> 8;
- }
+ xpnet_device->dev_addr[0] = 0x02; /* locally administered, no OUI */
+
+ partid = xp_partition_id;
+
+ xpnet_device->dev_addr[XPNET_PARTID_OCTET + 1] = partid & 0xff;
+ xpnet_device->dev_addr[XPNET_PARTID_OCTET + 0] |= (partid >> 8) & 0xff;

/*
* ether_setup() sets this to a multicast device. We are
Index: linux-2.6/drivers/misc/xp/Makefile
===================================================================
--- linux-2.6.orig/drivers/misc/xp/Makefile 2008-03-25 13:47:59.962929996 -0500
+++ linux-2.6/drivers/misc/xp/Makefile 2008-03-25 13:51:08.950463694 -0500
@@ -3,7 +3,10 @@
#

obj-$(CONFIG_SGI_XP) += xp.o
-xp-y := xp_main.o xp_nofault.o
+xp-y := xp_main.o xp_uv.o
+xp-$(CONFIG_IA64) += xp_sn2.o xp_nofault.o
+
obj-$(CONFIG_SGI_XP) += xpc.o
xpc-y := xpc_main.o xpc_channel.o xpc_partition.o
+
obj-$(CONFIG_SGI_XP) += xpnet.o
Index: linux-2.6/drivers/misc/xp/xp_nofault.S
===================================================================
--- linux-2.6.orig/drivers/misc/xp/xp_nofault.S 2008-03-25 13:47:59.962929996 -0500
+++ linux-2.6/drivers/misc/xp/xp_nofault.S 2008-03-25 13:51:08.970466184 -0500
@@ -3,7 +3,7 @@
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * Copyright (c) 2004-2007 Silicon Graphics, Inc. All Rights Reserved.
+ * Copyright (c) 2004-2008 Silicon Graphics, Inc. All Rights Reserved.
*/

Index: linux-2.6/include/asm-ia64/sn/bte.h
===================================================================
--- linux-2.6.orig/include/asm-ia64/sn/bte.h 2008-03-25 13:47:59.966930495 -0500
+++ linux-2.6/include/asm-ia64/sn/bte.h 2008-03-25 13:51:08.998469671 -0500
@@ -3,7 +3,7 @@
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * Copyright (c) 2000-2007 Silicon Graphics, Inc. All Rights Reserved.
+ * Copyright (c) 2000-2008 Silicon Graphics, Inc. All Rights Reserved.
*/

@@ -177,9 +177,6 @@ typedef enum {
#define BTE_GET_ERROR_STATUS(_status) \
(BTE_SHUB2_ERROR(_status) & ~IBLS_ERROR)

-#define BTE_VALID_SH2_ERROR(value) \
- ((value >= BTEFAIL_SH2_RESP_SHORT) && (value <= BTEFAIL_SH2_ALL))
-
/*
* Structure defining a bte. An instance of this
* structure is created in the nodepda for each
Index: linux-2.6/drivers/misc/xp/xp_uv.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6/drivers/misc/xp/xp_uv.c 2008-03-25 13:51:09.018472162 -0500
@@ -0,0 +1,194 @@
+/*
+ * 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 Silicon Graphics, Inc. All Rights Reserved.
+ */
+
+/*
+ * Cross Partition (XP) uv-based functions.
+ *
+ * Architecture specific implementation of common functions.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/device.h>
+#include "xp.h"
+
+extern struct device *xp;
+
+static enum xp_retval
+xp_register_nofault_code_uv(void)
+{
+ return xpSuccess;
+}
+
+static void
+xp_unregister_nofault_code_uv(void)
+{
+}
+
+static enum xp_retval
+xp_remote_memcpy_uv(void *vdst, const void *psrc, size_t len)
+{
+ /* >>> this function needs fleshing out */
+ return xpUnsupported;
+}
+
+static enum xp_retval
+xp_register_remote_amos_uv(u64 paddr, size_t len)
+{
+ /* >>> this function needs fleshing out */
+ return xpUnsupported;
+}
+
+static enum xp_retval
+xp_unregister_remote_amos_uv(u64 paddr, size_t len)
+{
+ /* >>> this function needs fleshing out */
+ return xpUnsupported;
+}
+
+/*
+ * Allocate the required number of contiguous physical pages to hold the
+ * specified number of AMOs.
+ */
+static u64 *
+xp_alloc_amos_uv(int n_amos)
+{
+ size_t n_bytes = roundup(n_amos * xp_sizeof_amo, PAGE_SIZE);
+ struct page *page;
+ u64 *amos_page = NULL;
+
+ page = alloc_pages_node(0, GFP_KERNEL | __GFP_ZERO | GFP_THISNODE,
+ get_order(n_bytes));
+ if (page)
+ amos_page = (u64 *)page_address(page);
+
+ return amos_page;
+}
+
+static void
+xp_free_amos_uv(u64 *amos_page, int n_amos)
+{
+ size_t n_bytes = roundup(n_amos * xp_sizeof_amo, PAGE_SIZE);
+
+ free_pages((u64)amos_page, get_order(n_bytes));
+}
+
+static enum xp_retval
+xp_set_amo_uv(u64 *amo_va, int op, u64 operand, int remote)
+{
+ /* >>> this function needs fleshing out */
+ return xpUnsupported;
+}
+
+static enum xp_retval
+xp_set_amo_with_interrupt_uv(u64 *amo_va, int op, u64 operand, int remote,
+ int nasid, int phys_cpuid, int vector)
+{
+ /* >>> this function needs fleshing out */
+ return xpUnsupported;
+}
+
+static enum xp_retval
+xp_get_amo_uv(u64 *amo_va, int op, u64 *amo_value_addr)
+{
+ /* >>> this function needs fleshing out */
+ return xpUnsupported;
+}
+
+static enum xp_retval
+xp_get_partition_rsvd_page_pa_uv(u64 buf, u64 *cookie, u64 *paddr, size_t *len)
+{
+ /* >>> this function needs fleshing out */
+ return xpUnsupported;
+}
+
+static enum xp_retval
+xp_change_memprotect_uv(u64 paddr, size_t len, int request, u64 *nasid_array)
+{
+ /* >>> this function needs fleshing out */
+ return xpUnsupported;
+}
+
+static void
+xp_change_memprotect_shub_wars_1_1_uv(int request)
+{
+ return;
+}
+
+static void
+xp_allow_IPI_ops_uv(void)
+{
+ /* >>> this function needs fleshing out */
+ return;
+}
+
+static void
+xp_disallow_IPI_ops_uv(void)
+{
+ /* >>> this function needs fleshing out */
+ return;
+}
+
+static int
+xp_cpu_to_nasid_uv(int cpuid)
+{
+ /* >>> this function needs fleshing out */
+ return -1;
+}
+
+static int
+xp_node_to_nasid_uv(int nid)
+{
+ /* >>> this function needs fleshing out */
+ return -1;
+}
+
+enum xp_retval
+xp_init_uv(void)
+{
+ BUG_ON(!is_uv());
+
+ xp_partition_id = 0; /* >>> not correct value */
+ xp_region_size = 0; /* >>> not correct value */
+ xp_rtc_cycles_per_second = 0; /* >>> not correct value */
+
+ xp_remote_memcpy = xp_remote_memcpy_uv;
+
+ xp_register_remote_amos = xp_register_remote_amos_uv;
+ xp_unregister_remote_amos = xp_unregister_remote_amos_uv;
+
+ xp_sizeof_amo = sizeof(u64);
+ xp_alloc_amos = xp_alloc_amos_uv;
+ xp_free_amos = xp_free_amos_uv;
+ xp_set_amo = xp_set_amo_uv;
+ xp_set_amo_with_interrupt = xp_set_amo_with_interrupt_uv;
+ xp_get_amo = xp_get_amo_uv;
+
+ xp_get_partition_rsvd_page_pa = xp_get_partition_rsvd_page_pa_uv;
+
+ xp_change_memprotect = xp_change_memprotect_uv;
+ xp_change_memprotect_shub_wars_1_1 =
+ xp_change_memprotect_shub_wars_1_1_uv;
+ xp_allow_IPI_ops = xp_allow_IPI_ops_uv;
+ xp_disallow_IPI_ops = xp_disallow_IPI_ops_uv;
+
+ xp_cpu_to_nasid = xp_cpu_to_nasid_uv;
+ xp_node_to_nasid = xp_node_to_nasid_uv;
+
+ return xp_register_nofault_code_uv();
+}
+
+void
+xp_exit_uv(void)
+{
+ BUG_ON(!is_uv());
+
+ xp_unregister_nofault_code_uv();
+}
+
Index: linux-2.6/arch/ia64/sn/kernel/setup.c
===================================================================
--- linux-2.6.orig/arch/ia64/sn/kernel/setup.c 2008-03-25 13:47:59.966930495 -0500
+++ linux-2.6/arch/ia64/sn/kernel/setup.c 2008-03-25 13:51:09.038474652 -0500
@@ -3,7 +3,7 @@
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * Copyright (C) 1999,2001-2006 Silicon Graphics, Inc. All rights reserved.
+ * Copyright (C) 1999,2001-2008 Silicon Graphics, Inc. All rights reserved.
*/

#include <linux/module.h>
@@ -93,7 +93,7 @@ u8 sn_region_size;
EXPORT_SYMBOL(sn_region_size);
int sn_prom_type; /* 0=hardware, 1=medusa/realprom, 2=medusa/fakeprom */

-short physical_node_map[MAX_NUMALINK_NODES];
+short physical_node_map[SN_MAX_NUMALINK_NODES];
static unsigned long sn_prom_features[MAX_PROM_FEATURE_SETS];

EXPORT_SYMBOL(physical_node_map);
Index: linux-2.6/include/asm-ia64/sn/arch.h
===================================================================
--- linux-2.6.orig/include/asm-ia64/sn/arch.h 2008-03-25 13:47:59.966930495 -0500
+++ linux-2.6/include/asm-ia64/sn/arch.h 2008-03-25 13:51:09.066478139 -0500
@@ -5,7 +5,7 @@
*
* SGI specific setup.
*
- * Copyright (C) 1995-1997,1999,2001-2005 Silicon Graphics, Inc. All rights reserved.
+ * Copyright (C) 1995-1997,1999,2001-2005,2008 Silicon Graphics, Inc. All rights reserved.
* Copyright (C) 1999 Ralf Baechle (ralf@gnu.org)
*/
#ifndef _ASM_IA64_SN_ARCH_H
@@ -42,7 +42,7 @@
* This value is also the value of the maximum number of NASIDs in the numalink
* fabric.
*/
-#define MAX_NUMALINK_NODES 16384
+#define SN_MAX_NUMALINK_NODES 16384

/*
* The following defines attributes of the HUB chip. These attributes are
@@ -60,6 +60,7 @@ DECLARE_PER_CPU(struct sn_hub_info_s, __
#define sn_hub_info (&__get_cpu_var(__sn_hub_info))
#define is_shub2() (sn_hub_info->shub2)
#define is_shub1() (sn_hub_info->shub2 == 0)
+#define is_shub() (is_shub1() || is_shub2())

/*
* Use this macro to test if shub 1.1 wars should be enabled
Index: linux-2.6/drivers/misc/xp/xp_sn2.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6/drivers/misc/xp/xp_sn2.c 2008-03-25 13:51:09.090481128 -0500
@@ -0,0 +1,487 @@
+/*
+ * 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 Silicon Graphics, Inc. All Rights Reserved.
+ */
+
+/*
+ * Cross Partition (XP) sn2-based functions.
+ *
+ * Architecture specific implementation of common functions.
+ */
+
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <asm/uncached.h>
+#include <asm/sn/intr.h>
+#include <asm/sn/bte.h>
+#include <asm/sn/clksupport.h>
+#include <asm/sn/mspec.h>
+#include <asm/sn/sn_sal.h>
+#include "xp.h"
+
+extern struct device *xp;
+
+/*
+ * Register a nofault code region which performs a cross-partition PIO read.
+ * If the PIO read times out, the MCA handler will consume the error and
+ * return to a kernel-provided instruction to indicate an error. This PIO read
+ * exists because it is guaranteed to timeout if the destination is down
+ * (AMO operations do not timeout on at least some CPUs on Shubs <= v1.2,
+ * which unfortunately we have to work around).
+ */
+static enum xp_retval
+xp_register_nofault_code_sn2(void)
+{
+ int ret;
+ u64 func_addr;
+ u64 err_func_addr;
+
+ func_addr = *(u64 *)xp_nofault_PIOR;
+ err_func_addr = *(u64 *)xp_error_PIOR;
+ ret = sn_register_nofault_code(func_addr, err_func_addr, err_func_addr,
+ 1, 1);
+ if (ret != 0) {
+ dev_err(xp, "can't register nofault code, error=%d\n", ret);
+ return xpSalError;
+ }
+ /*
+ * Setup the nofault PIO read target. (There is no special reason why
+ * SH_IPI_ACCESS was selected.)
+ */
+ if (is_shub1())
+ xp_nofault_PIOR_target = SH1_IPI_ACCESS;
+ else if (is_shub2())
+ xp_nofault_PIOR_target = SH2_IPI_ACCESS0;
+
+ return xpSuccess;
+}
+
+void
+xp_unregister_nofault_code_sn2(void)
+{
+ u64 func_addr = *(u64 *)xp_nofault_PIOR;
+ u64 err_func_addr = *(u64 *)xp_error_PIOR;
+
+ /* unregister the PIO read nofault code region */
+ (void)sn_register_nofault_code(func_addr, err_func_addr,
+ err_func_addr, 1, 0);
+}
+
+/*
+ * Wrapper for bte_copy().
+ *
+ * vdst - virtual address of the destination of the transfer.
+ * psrc - physical address of the source of the transfer.
+ * len - number of bytes to transfer from source to destination.
+ *
+ * Note: xp_remote_memcpy_sn2() should never be called while holding a spinlock.
+ */
+static enum xp_retval
+xp_remote_memcpy_sn2(void *vdst, const void *psrc, size_t len)
+{
+ bte_result_t ret;
+ u64 pdst = ia64_tpa(vdst);
+ /* >>> What are the rules governing the src and dst addresses passed in?
+ * >>> Currently we're assuming that dst is a virtual address and src
+ * >>> is a physical address, is this appropriate? Can we allow them to
+ * >>> be whatever and we make the change here without damaging the
+ * >>> addresses?
+ */
+
+ /*
+ * Ensure that the physically mapped memory is contiguous.
+ *
+ * We do this by ensuring that the memory is from region 7 only.
+ * If the need should arise to use memory from one of the other
+ * regions, then modify the BUG_ON() statement to ensure that the
+ * memory from that region is always physically contiguous.
+ */
+ BUG_ON(REGION_NUMBER(vdst) != RGN_KERNEL);
+
+ ret = bte_copy((u64)psrc, pdst, len, (BTE_NOTIFY | BTE_WACQUIRE), NULL);
+ if (ret == BTE_SUCCESS)
+ return xpSuccess;
+
+ if (is_shub2())
+ dev_err(xp, "bte_copy() on shub2 failed, error=0x%x\n", ret);
+ else
+ dev_err(xp, "bte_copy() failed, error=%d\n", ret);
+
+ return xpBteCopyError;
+}
+
+/*
+ * Register the remote partition's AMOs with SAL so it can handle and cleanup
+ * errors within that address range should the remote partition go down. We
+ * don't unregister this range because it is difficult to tell when outstanding
+ * writes to the remote partition are finished and thus when it is safe to
+ * unregister. This should not result in wasted space in the SAL xp_addr_region
+ * table because we should get the same page for remote_amos_page_pa after
+ * module reloads and system reboots.
+ */
+static enum xp_retval
+xp_register_remote_amos_sn2(u64 paddr, size_t len)
+{
+ enum xp_retval ret = xpSuccess;
+
+ if (sn_register_xp_addr_region(paddr, len, 1) < 0)
+ ret = xpSalError;
+ return ret;
+}
+
+static enum xp_retval
+xp_unregister_remote_amos_sn2(u64 paddr, size_t len)
+{
+ return xpSuccess; /* we don't unregister AMOs on sn2 */
+}
+
+/*
+ * Allocate the required number of contiguous physical pages to hold the
+ * specified number of AMOs.
+ */
+static u64 *
+xp_alloc_amos_sn2(int n_amos)
+{
+ int n_pages = DIV_ROUND_UP(n_amos * xp_sizeof_amo, PAGE_SIZE);
+
+ return (u64 *)TO_AMO(uncached_alloc_page(0, n_pages));
+}
+
+static void
+xp_free_amos_sn2(u64 *amos_page, int n_amos)
+{
+ int n_pages = DIV_ROUND_UP(n_amos * xp_sizeof_amo, PAGE_SIZE);
+
+ uncached_free_page(__IA64_UNCACHED_OFFSET | TO_PHYS((u64) amos_page),
+ n_pages);
+}
+
+
+static enum xp_retval
+xp_set_amo_sn2(u64 *amo_va, int op, u64 operand, int remote)
+{
+ unsigned long irq_flags = irq_flags; /* eliminate compiler warning */
+ int ret = xpSuccess;
+ /* >>> eliminate remote arg and xp_nofault_PIOR() call */
+
+ if (op == XP_AMO_AND)
+ op = FETCHOP_AND;
+ else if (op == XP_AMO_OR)
+ op = FETCHOP_OR;
+ else
+ BUG();
+
+ if (remote)
+ local_irq_save(irq_flags);
+
+ FETCHOP_STORE_OP(TO_AMO((u64)amo_va), op, operand);
+
+ if (remote) {
+ /*
+ * We must always use the nofault function regardless of
+ * whether we are on a Shub 1.1 system or a Shub 1.2 slice
+ * 0xc processor. If we didn't, we'd never know that the other
+ * partition is down and would keep sending IPIs and AMOs to
+ * it until the heartbeat times out.
+ */
+ if (xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(amo_va),
+ xp_nofault_PIOR_target)) != 0)
+ ret = xpPioReadError;
+
+ local_irq_restore(irq_flags);
+ }
+
+ return ret;
+}
+
+static enum xp_retval
+xp_set_amo_with_interrupt_sn2(u64 *amo_va, int op, u64 operand, int remote,
+ int nasid, int phys_cpuid, int vector)
+{
+ unsigned long irq_flags = irq_flags; /* eliminate compiler warning */
+ int ret = xpSuccess;
+
+ if (op == XP_AMO_AND)
+ op = FETCHOP_AND;
+ else if (op == XP_AMO_OR)
+ op = FETCHOP_OR;
+ else
+ BUG();
+
+ if (remote)
+ local_irq_save(irq_flags);
+
+ FETCHOP_STORE_OP(TO_AMO((u64)amo_va), op, operand);
+ sn_send_IPI_phys(nasid, phys_cpuid, vector, 0);
+
+ if (remote) {
+ /*
+ * We must always use the nofault function regardless of
+ * whether we are on a Shub 1.1 system or a Shub 1.2 slice
+ * 0xc processor. If we didn't, we'd never know that the other
+ * partition is down and would keep sending IPIs and AMOs to
+ * it until the heartbeat times out.
+ */
+ if (xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(amo_va),
+ xp_nofault_PIOR_target)) != 0)
+ ret = xpPioReadError;
+
+ local_irq_restore(irq_flags);
+ }
+
+ return ret;
+}
+
+static enum xp_retval
+xp_get_amo_sn2(u64 *amo_va, int op, u64 *amo_value_addr)
+{
+ u64 amo_value;
+
+ if (op == XP_AMO_LOAD)
+ op = FETCHOP_LOAD;
+ else if (op == XP_AMO_CLEAR)
+ op = FETCHOP_CLEAR;
+ else
+ BUG();
+
+ amo_value = FETCHOP_LOAD_OP(TO_AMO((u64)amo_va), op);
+ if (amo_value_addr != NULL)
+ *amo_value_addr = amo_value;
+ return xpSuccess;
+}
+
+static enum xp_retval
+xp_get_partition_rsvd_page_pa_sn2(u64 buf, u64 *cookie, u64 *paddr, size_t *len)
+{
+ s64 status;
+ enum xp_retval ret;
+
+ status = sn_partition_reserved_page_pa(buf, cookie, paddr, len);
+ if (status == SALRET_OK)
+ ret = xpSuccess;
+ else if (status == SALRET_MORE_PASSES)
+ ret = xpNeedMoreInfo;
+ else
+ ret = xpSalError;
+
+ return ret;
+}
+
+static enum xp_retval
+xp_change_memprotect_sn2(u64 paddr, size_t len, int request, u64 *nasid_array)
+{
+ u64 perms;
+ int status;
+
+ /*
+ * Since the BIST collides with memory operations on
+ * SHUB 1.1, sn_change_memprotect() cannot be used. See
+ * xp_change_memprotect_shub_wars_1_1() for WAR.
+ */
+ if (enable_shub_wars_1_1())
+ return xpSuccess;
+
+ if (request == XP_MEMPROT_DISALLOW_ALL)
+ perms = SN_MEMPROT_ACCESS_CLASS_0;
+ else if (request == XP_MEMPROT_ALLOW_CPU_AMO)
+ perms = SN_MEMPROT_ACCESS_CLASS_1;
+ else if (request == XP_MEMPROT_ALLOW_CPU_MEM)
+ perms = SN_MEMPROT_ACCESS_CLASS_2;
+ else
+ BUG();
+
+ status = sn_change_memprotect(paddr, len, perms, nasid_array);
+ return (status == 0) ? xpSuccess : xpSalError;
+}
+
+/* original protection values for each node */
+static u64 xpc_prot_vec[MAX_NUMNODES];
+
+/*
+ * Change protections to allow/disallow all operations on Shub 1.1 systems.
+ */
+static void
+xp_change_memprotect_shub_wars_1_1_sn2(int request)
+{
+ int node;
+ int nasid;
+
+ /*
+ * Since the BIST collides with memory operations on SHUB 1.1
+ * sn_change_memprotect() cannot be used.
+ */
+ if (!enable_shub_wars_1_1())
+ return;
+
+ if (request == XP_MEMPROT_ALLOW_ALL) {
+ for_each_online_node(node) {
+ nasid = cnodeid_to_nasid(node);
+ /* save current protection values */
+ xpc_prot_vec[node] =
+ (u64)HUB_L((u64 *)GLOBAL_MMR_ADDR(nasid,
+ SH1_MD_DQLP_MMR_DIR_PRIVEC0));
+ /* open up everything */
+ HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid,
+ SH1_MD_DQLP_MMR_DIR_PRIVEC0), -1UL);
+ HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid,
+ SH1_MD_DQRP_MMR_DIR_PRIVEC0), -1UL);
+ }
+ } else if (request == XP_MEMPROT_DISALLOW_ALL) {
+ for_each_online_node(node) {
+ nasid = cnodeid_to_nasid(node);
+ /* restore original protection values */
+ HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid,
+ SH1_MD_DQLP_MMR_DIR_PRIVEC0), xpc_prot_vec[node]);
+ HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid,
+ SH1_MD_DQRP_MMR_DIR_PRIVEC0), xpc_prot_vec[node]);
+ }
+ } else
+ BUG();
+}
+
+/* SH_IPI_ACCESS shub register value on startup */
+static u64 xpc_sh1_IPI_access;
+static u64 xpc_sh2_IPI_access0;
+static u64 xpc_sh2_IPI_access1;
+static u64 xpc_sh2_IPI_access2;
+static u64 xpc_sh2_IPI_access3;
+
+/*
+ * Change protections to allow IPI operations.
+ */
+static void
+xp_allow_IPI_ops_sn2(void)
+{
+ int node;
+ int nasid;
+
+ /* >>> The following should get moved into SAL. */
+ if (is_shub2()) {
+ xpc_sh2_IPI_access0 =
+ (u64)HUB_L((u64 *)LOCAL_MMR_ADDR(SH2_IPI_ACCESS0));
+ xpc_sh2_IPI_access1 =
+ (u64)HUB_L((u64 *)LOCAL_MMR_ADDR(SH2_IPI_ACCESS1));
+ xpc_sh2_IPI_access2 =
+ (u64)HUB_L((u64 *)LOCAL_MMR_ADDR(SH2_IPI_ACCESS2));
+ xpc_sh2_IPI_access3 =
+ (u64)HUB_L((u64 *)LOCAL_MMR_ADDR(SH2_IPI_ACCESS3));
+
+ for_each_online_node(node) {
+ nasid = cnodeid_to_nasid(node);
+ HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS0),
+ -1UL);
+ HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS1),
+ -1UL);
+ HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS2),
+ -1UL);
+ HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS3),
+ -1UL);
+ }
+ } else {
+ xpc_sh1_IPI_access =
+ (u64)HUB_L((u64 *)LOCAL_MMR_ADDR(SH1_IPI_ACCESS));
+
+ for_each_online_node(node) {
+ nasid = cnodeid_to_nasid(node);
+ HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH1_IPI_ACCESS),
+ -1UL);
+ }
+ }
+}
+
+/*
+ * Restrict protections to disallow IPI operations.
+ */
+static void
+xp_disallow_IPI_ops_sn2(void)
+{
+ int node;
+ int nasid;
+
+ /* >>> The following should get moved into SAL. */
+ if (is_shub2()) {
+ for_each_online_node(node) {
+ nasid = cnodeid_to_nasid(node);
+ HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS0),
+ xpc_sh2_IPI_access0);
+ HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS1),
+ xpc_sh2_IPI_access1);
+ HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS2),
+ xpc_sh2_IPI_access2);
+ HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS3),
+ xpc_sh2_IPI_access3);
+ }
+ } else {
+ for_each_online_node(node) {
+ nasid = cnodeid_to_nasid(node);
+ HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH1_IPI_ACCESS),
+ xpc_sh1_IPI_access);
+ }
+ }
+}
+
+static int
+xp_cpu_to_nasid_sn2(int cpuid)
+{
+ return cpuid_to_nasid(cpuid);
+}
+
+static int
+xp_node_to_nasid_sn2(int nid)
+{
+ return cnodeid_to_nasid(nid);
+}
+
+enum xp_retval
+xp_init_sn2(void)
+{
+ BUG_ON(!is_shub());
+
+ xp_partition_id = sn_partition_id;
+ xp_region_size = sn_region_size;
+ xp_rtc_cycles_per_second = sn_rtc_cycles_per_second;
+
+ xp_remote_memcpy = xp_remote_memcpy_sn2;
+
+ xp_register_remote_amos = xp_register_remote_amos_sn2;
+ xp_unregister_remote_amos = xp_unregister_remote_amos_sn2;
+
+ /*
+ * MSPEC based AMOs are assumed to have the important bits in only the
+ * first 64. The remainder is ignored other than xp_sizeof_amo must
+ * reflect its existence.
+ */
+ BUG_ON(offsetof(AMO_t, variable) != 0);
+ BUG_ON(sizeof(((AMO_t *)NULL)->variable) != sizeof(u64));
+ xp_sizeof_amo = sizeof(AMO_t);
+ xp_alloc_amos = xp_alloc_amos_sn2;
+ xp_free_amos = xp_free_amos_sn2;
+ xp_set_amo = xp_set_amo_sn2;
+ xp_set_amo_with_interrupt = xp_set_amo_with_interrupt_sn2;
+ xp_get_amo = xp_get_amo_sn2;
+
+ xp_get_partition_rsvd_page_pa = xp_get_partition_rsvd_page_pa_sn2;
+
+ xp_change_memprotect = xp_change_memprotect_sn2;
+ xp_change_memprotect_shub_wars_1_1 =
+ xp_change_memprotect_shub_wars_1_1_sn2;
+ xp_allow_IPI_ops = xp_allow_IPI_ops_sn2;
+ xp_disallow_IPI_ops = xp_disallow_IPI_ops_sn2;
+
+ xp_cpu_to_nasid = xp_cpu_to_nasid_sn2;
+ xp_node_to_nasid = xp_node_to_nasid_sn2;
+
+ return xp_register_nofault_code_sn2();
+}
+
+void
+xp_exit_sn2(void)
+{
+ BUG_ON(!is_shub());
+
+ xp_unregister_nofault_code_sn2();
+}
+
Index: linux-2.6/drivers/misc/Kconfig
===================================================================
--- linux-2.6.orig/drivers/misc/Kconfig 2008-03-25 13:50:58.000000000 -0500
+++ linux-2.6/drivers/misc/Kconfig 2008-03-25 13:51:36.301869309 -0500
@@ -329,7 +329,7 @@ config ENCLOSURE_SERVICES

config SGI_XP
tristate "Support communication between SGI SSIs"
- depends on IA64_GENERIC || IA64_SGI_SN2
+ depends on IA64_GENERIC || IA64_SGI_SN2 || X86_64
select IA64_UNCACHED_ALLOCATOR if IA64_GENERIC || IA64_SGI_SN2
select GENERIC_ALLOCATOR if IA64_GENERIC || IA64_SGI_SN2
---help---

--