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authorDean Nelson <dcn@sgi.com>2008-04-22 14:46:56 -0500
committerTony Luck <tony.luck@intel.com>2008-04-22 15:08:17 -0700
commit45d9ca492e4bd1522d1b5bd125c2908f1cee3d4a (patch)
treedfbe831a5f71159855c3a252856664411ca53f8a /include/asm-ia64
parent9010eff0eadfe4eb60c3f0c71573f0fc505c31e3 (diff)
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[IA64] move XP and XPC to drivers/misc/sgi-xp
Move XPC and XPNET from arch/ia64/sn/kernel to drivers/misc/sgi-xp. Signed-off-by: Dean Nelson <dcn@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'include/asm-ia64')
-rw-r--r--include/asm-ia64/sn/xp.h485
-rw-r--r--include/asm-ia64/sn/xpc.h1267
2 files changed, 0 insertions, 1752 deletions
diff --git a/include/asm-ia64/sn/xp.h b/include/asm-ia64/sn/xp.h
deleted file mode 100644
index f7711b308e48..000000000000
--- a/include/asm-ia64/sn/xp.h
+++ /dev/null
@@ -1,485 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2004-2005 Silicon Graphics, Inc. All rights reserved.
- */
-
-
-/*
- * External Cross Partition (XP) structures and defines.
- */
-
-
-#ifndef _ASM_IA64_SN_XP_H
-#define _ASM_IA64_SN_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 USE_DBUG_ON
-#define DBUG_ON(condition) BUG_ON(condition)
-#else
-#define DBUG_ON(condition)
-#endif
-
-
-/*
- * Define the maximum number of logically defined partitions the system
- * can support. It is constrained by the maximum number of hardware
- * partitionable regions. The term 'region' in this context refers to the
- * minimum number of nodes that can comprise an access protection grouping.
- * The access protection is in regards to memory, IPI and IOI.
- *
- * The maximum number of hardware partitionable regions is equal to the
- * maximum number of nodes in the entire system divided by the minimum number
- * of nodes that comprise an access protection grouping.
- */
-#define XP_MAX_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)
-
-
-/*
- * 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);
- }
-
- return ret;
-}
-
-
-/*
- * XPC establishes channel connections between the local partition and any
- * other partition that is currently up. Over these channels, kernel-level
- * `users' can communicate with their counterparts on the other partitions.
- *
- * The maxinum number of channels is limited to eight. For performance reasons,
- * the internal cross partition structures require sixteen bytes per channel,
- * and eight allows all of this interface-shared info to fit in one cache line.
- *
- * XPC_NCHANNELS reflects the total number of channels currently defined.
- * If the need for additional channels arises, one can simply increase
- * XPC_NCHANNELS accordingly. If the day should come where that number
- * exceeds the MAXIMUM number of channels allowed (eight), then one will need
- * to make changes to the XPC code to allow for this.
- */
-#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 */
-
-#if XPC_NCHANNELS > XPC_MAX_NCHANNELS
-#error XPC_NCHANNELS exceeds MAXIMUM allowed.
-#endif
-
-
-/*
- * The format of an XPC message is as follows:
- *
- * +-------+--------------------------------+
- * | flags |////////////////////////////////|
- * +-------+--------------------------------+
- * | message # |
- * +----------------------------------------+
- * | payload (user-defined message) |
- * | |
- * :
- * | |
- * +----------------------------------------+
- *
- * The size of the payload is defined by the user via xpc_connect(). A user-
- * defined message resides in the payload area.
- *
- * The user should have no dealings with the message header, but only the
- * message's payload. When a message entry is allocated (via xpc_allocate())
- * a pointer to the payload area is returned and not the actual beginning of
- * the XPC message. The user then constructs a message in the payload area
- * and passes that pointer as an argument on xpc_send() or xpc_send_notify().
- *
- * The size of a message entry (within a message queue) must be a cacheline
- * sized multiple in order to facilitate the BTE transfer of messages from one
- * message queue to another. A macro, XPC_MSG_SIZE(), is provided for the user
- * that wants to fit as many msg entries as possible in a given memory size
- * (e.g. a memory page).
- */
-struct xpc_msg {
- u8 flags; /* FOR XPC INTERNAL USE ONLY */
- u8 reserved[7]; /* FOR XPC INTERNAL USE ONLY */
- s64 number; /* FOR XPC INTERNAL USE ONLY */
-
- u64 payload; /* user defined portion of message */
-};
-
-
-#define XPC_MSG_PAYLOAD_OFFSET (u64) (&((struct xpc_msg *)0)->payload)
-#define XPC_MSG_SIZE(_payload_size) \
- L1_CACHE_ALIGN(XPC_MSG_PAYLOAD_OFFSET + (_payload_size))
-
-
-/*
- * 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.)
- */
-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 */
-
- 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 */
-
- xpcPartitionDown, /* 17: remote partition is down */
- xpcNotLoaded, /* 18: XPC module is not loaded */
- xpcUnloading, /* 19: this side is unloading XPC module */
-
- xpcBadMagic, /* 20: XPC MAGIC string not found */
-
- xpcReactivating, /* 21: remote partition was reactivated */
-
- xpcUnregistering, /* 22: this side is unregistering channel */
- xpcOtherUnregistering, /* 23: other side is unregistering channel */
-
- xpcCloneKThread, /* 24: cloning kernel thread */
- xpcCloneKThreadFailed, /* 25: cloning kernel thread failed */
-
- xpcNoHeartbeat, /* 26: remote partition has no heartbeat */
-
- xpcPioReadError, /* 27: PIO read error */
- xpcPhysAddrRegFailed, /* 28: registration of phys addr range failed */
-
- 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 */
-
- 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 */
-
- 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 */
-
- xpcDisconnecting, /* 49: channel disconnecting (closing) */
-
- xpcOpenCloseError, /* 50: channel open/close protocol error */
-
- xpcDisconnected, /* 51: channel disconnected (closed) */
-
- xpcBteSh2Start, /* 52: BTE CRB timeout */
-
- /* 53: 0x1 BTE Error Response Short */
- xpcBteSh2RspShort = xpcBteSh2Start + BTEFAIL_SH2_RESP_SHORT,
-
- /* 54: 0x2 BTE Error Response Long */
- xpcBteSh2RspLong = xpcBteSh2Start + BTEFAIL_SH2_RESP_LONG,
-
- /* 56: 0x4 BTE Error Response DSB */
- xpcBteSh2RspDSB = xpcBteSh2Start + BTEFAIL_SH2_RESP_DSP,
-
- /* 60: 0x8 BTE Error Response Access */
- xpcBteSh2RspAccess = xpcBteSh2Start + BTEFAIL_SH2_RESP_ACCESS,
-
- /* 68: 0x10 BTE Error CRB timeout */
- xpcBteSh2CRBTO = xpcBteSh2Start + BTEFAIL_SH2_CRB_TO,
-
- /* 84: 0x20 BTE Error NACK limit */
- xpcBteSh2NACKLimit = xpcBteSh2Start + BTEFAIL_SH2_NACK_LIMIT,
-
- /* 115: BTE end */
- xpcBteSh2End = xpcBteSh2Start + BTEFAIL_SH2_ALL,
-
- xpcUnknownReason /* 116: unknown reason -- must be last in list */
-};
-
-
-/*
- * Define the callout function types used by XPC to update the user on
- * connection activity and state changes (via the user function registered by
- * xpc_connect()) and to notify them of messages received and delivered (via
- * the user function registered by xpc_send_notify()).
- *
- * The two function types are xpc_channel_func and xpc_notify_func and
- * both share the following arguments, with the exception of "data", which
- * only xpc_channel_func has.
- *
- * Arguments:
- *
- * reason - reason code. (See following table.)
- * partid - partition ID associated with condition.
- * ch_number - channel # associated with condition.
- * data - pointer to optional data. (See following table.)
- * key - pointer to optional user-defined value provided as the "key"
- * argument to xpc_connect() or xpc_send_notify().
- *
- * In the following table the "Optional Data" column applies to callouts made
- * to functions registered by xpc_connect(). A "NA" in that column indicates
- * that this reason code can be passed to functions registered by
- * xpc_send_notify() (i.e. they don't have data arguments).
- *
- * Also, the first three reason codes in the following table indicate
- * success, whereas the others indicate failure. When a failure reason code
- * is received, one can assume that the channel is not connected.
- *
- *
- * Reason Code | Cause | Optional Data
- * =====================+================================+=====================
- * xpcConnected | 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
- * | the specified partition on the |
- * | specified channel | [the user must call
- * | | xpc_received() when
- * | | finished with the
- * | | payload]
- * ---------------------+--------------------------------+---------------------
- * xpcMsgDelivered | 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
- * | partition on the specified |
- * | channel because of mismatched |
- * | message sizes |
- * ---------------------+--------------------------------+---------------------
- * xpcNoMemory | insufficient memory avaiable | NULL
- * | to allocate message queue |
- * ---------------------+--------------------------------+---------------------
- * xpcLackOfResources | lack of resources to create | NULL
- * | the necessary kthreads to |
- * | support the channel |
- * ---------------------+--------------------------------+---------------------
- * xpcUnregistering | this side's user has | NULL or NA
- * | unregistered by calling |
- * | xpc_disconnect() |
- * ---------------------+--------------------------------+---------------------
- * xpcOtherUnregistering| 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
- * | longer heartbeating |
- * | |
- * ---------------------+--------------------------------+---------------------
- * xpcUnloading | this side's XPC module is | NULL or NA
- * | being unloaded |
- * | |
- * ---------------------+--------------------------------+---------------------
- * xpcOtherUnloading | the other side's XPC module is | NULL or NA
- * | is being unloaded |
- * | |
- * ---------------------+--------------------------------+---------------------
- * xpcPioReadError | xp_nofault_PIOR() returned an | NULL or NA
- * | error while sending an IPI |
- * | |
- * ---------------------+--------------------------------+---------------------
- * xpcInvalidAddress | 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 | |
- * ---------------------+--------------------------------+---------------------
- * xpcUnknownReason | 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,
- int ch_number, void *data, void *key);
-
-typedef void (*xpc_notify_func)(enum xpc_retval reason, partid_t partid,
- int ch_number, void *key);
-
-
-/*
- * The following is a registration entry. There is a global array of these,
- * one per channel. It is used to record the connection registration made
- * by the users of XPC. As long as a registration entry exists, for any
- * partition that comes up, XPC will attempt to establish a connection on
- * that channel. Notification that a connection has been made will occur via
- * the xpc_channel_func function.
- *
- * The 'func' field points to the function to call when aynchronous
- * notification is required for such events as: a connection established/lost,
- * or an incoming message received, or an error condition encountered. A
- * non-NULL 'func' field indicates that there is an active registration for
- * the channel.
- */
-struct xpc_registration {
- struct mutex mutex;
- xpc_channel_func func; /* function to call */
- void *key; /* pointer to user's key */
- u16 nentries; /* #of msg entries in local msg queue */
- u16 msg_size; /* message queue's message size */
- u32 assigned_limit; /* limit on #of assigned kthreads */
- u32 idle_limit; /* limit on #of idle kthreads */
-} ____cacheline_aligned;
-
-
-#define XPC_CHANNEL_REGISTERED(_c) (xpc_registrations[_c].func != NULL)
-
-
-/* the following are valid xpc_allocate() flags */
-#define XPC_WAIT 0 /* wait flag */
-#define XPC_NOWAIT 1 /* no wait flag */
-
-
-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 *,
- xpc_notify_func, void *);
- void (*received)(partid_t, int, void *);
- enum xpc_retval (*partid_to_nasids)(partid_t, void *);
-};
-
-
-extern struct xpc_interface xpc_interface;
-
-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,
- void *),
- void (*)(partid_t, int, void *),
- enum xpc_retval (*)(partid_t, void *));
-extern void xpc_clear_interface(void);
-
-
-extern enum xpc_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)
-{
- return xpc_interface.allocate(partid, ch_number, flags, payload);
-}
-
-static inline enum xpc_retval
-xpc_send(partid_t 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,
- 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)
-{
- return xpc_interface.received(partid, ch_number, payload);
-}
-
-static inline enum xpc_retval
-xpc_partid_to_nasids(partid_t partid, void *nasids)
-{
- return xpc_interface.partid_to_nasids(partid, nasids);
-}
-
-
-extern u64 xp_nofault_PIOR_target;
-extern int xp_nofault_PIOR(void *);
-extern int xp_error_PIOR(void);
-
-
-#endif /* _ASM_IA64_SN_XP_H */
-
diff --git a/include/asm-ia64/sn/xpc.h b/include/asm-ia64/sn/xpc.h
deleted file mode 100644
index 3c0900ab8003..000000000000
--- a/include/asm-ia64/sn/xpc.h
+++ /dev/null
@@ -1,1267 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (c) 2004-2007 Silicon Graphics, Inc. All Rights Reserved.
- */
-
-
-/*
- * Cross Partition Communication (XPC) structures and macros.
- */
-
-#ifndef _ASM_IA64_SN_XPC_H
-#define _ASM_IA64_SN_XPC_H
-
-
-#include <linux/interrupt.h>
-#include <linux/sysctl.h>
-#include <linux/device.h>
-#include <linux/mutex.h>
-#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>
-
-
-/*
- * XPC Version numbers consist of a major and minor number. XPC can always
- * talk to versions with same major #, and never talk to versions with a
- * different major #.
- */
-#define _XPC_VERSION(_maj, _min) (((_maj) << 4) | ((_min) & 0xf))
-#define XPC_VERSION_MAJOR(_v) ((_v) >> 4)
-#define XPC_VERSION_MINOR(_v) ((_v) & 0xf)
-
-
-/*
- * 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
- * inter-partition initiation communications.
- *
- * For SN2 machines, C-Bricks are alway even numbered NASIDs. As
- * such, some space will be saved by insisting that nasid information
- * 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_HB_DEFAULT_INTERVAL 5 /* incr HB every x secs */
-#define XPC_HB_CHECK_DEFAULT_INTERVAL 20 /* check HB every x secs */
-
-/* define the process name of HB checker and the CPU it is pinned to */
-#define XPC_HB_CHECK_THREAD_NAME "xpc_hb"
-#define XPC_HB_CHECK_CPU 0
-
-/* define the process name of the discovery thread */
-#define XPC_DISCOVERY_THREAD_NAME "xpc_discovery"
-
-
-/*
- * the reserved page
- *
- * SAL reserves one page of memory per partition for XPC. Though a full page
- * in length (16384 bytes), its starting address is not page aligned, but it
- * is cacheline aligned. The reserved page consists of the following:
- *
- * reserved page header
- *
- * The first 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
- * partition's reserved page.)
- *
- * part_nasids mask
- * mach_nasids mask
- *
- * SAL also sets up two bitmaps (or masks), one that reflects the actual
- * nasids in this partition (part_nasids), and the other that reflects
- * the actual nasids in the entire machine (mach_nasids). We're only
- * interested in the even numbered nasids (which contain the processors
- * and/or memory), so we only need half as many bits to represent the
- * nasids. The part_nasids mask is located starting at the first cacheline
- * following the reserved page header. The mach_nasids mask follows right
- * after the part_nasids mask. The size in bytes of each mask is reflected
- * by the reserved page header field 'nasids_size'. (Local partition's
- * mask pointers are xpc_part_nasids and xpc_mach_nasids.)
- *
- * vars
- * vars part
- *
- * Immediately following the mach_nasids mask are the XPC variables
- * required by other partitions. First are those that are generic to all
- * partitions (vars), followed on the next available cacheline by those
- * which are partition specific (vars part). These are setup by XPC.
- * (Local partition's vars pointers are xpc_vars and xpc_vars_part.)
- *
- * Note: Until vars_pa is set, the partition XPC code has not been initialized.
- */
-struct xpc_rsvd_page {
- u64 SAL_signature; /* SAL: unique signature */
- u64 SAL_version; /* SAL: version */
- u8 partid; /* SAL: partition ID */
- u8 version;
- u8 pad1[6]; /* align to next u64 in cacheline */
- volatile u64 vars_pa;
- 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 */
-};
-
-#define XPC_RP_VERSION _XPC_VERSION(1,1) /* version 1.1 of the reserved page */
-
-#define XPC_SUPPORTS_RP_STAMP(_version) \
- (_version >= _XPC_VERSION(1,1))
-
-/*
- * compare stamps - the return value is:
- *
- * < 0, if stamp1 < stamp2
- * = 0, if stamp1 == stamp2
- * > 0, if stamp1 > stamp2
- */
-static inline int
-xpc_compare_stamps(struct timespec *stamp1, struct timespec *stamp2)
-{
- int ret;
-
-
- if ((ret = stamp1->tv_sec - stamp2->tv_sec) == 0) {
- ret = stamp1->tv_nsec - stamp2->tv_nsec;
- }
- return ret;
-}
-
-
-/*
- * Define the structures by which XPC variables can be exported to other
- * partitions. (There are two: struct xpc_vars and struct xpc_vars_part)
- */
-
-/*
- * The following structure describes the partition generic variables
- * needed by other partitions in order to properly initialize.
- *
- * struct xpc_vars version number also applies to struct xpc_vars_part.
- * Changes to either structure and/or related functionality should be
- * reflected by incrementing either the major or minor version numbers
- * of struct xpc_vars.
- */
-struct xpc_vars {
- u8 version;
- u64 heartbeat;
- u64 heartbeating_to_mask;
- u64 heartbeat_offline; /* if 0, heartbeat should be changing */
- 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 */
-};
-
-#define XPC_V_VERSION _XPC_VERSION(3,1) /* version 3.1 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)
-{
- return ((vars->heartbeating_to_mask & (1UL << partid)) != 0);
-}
-
-static inline void
-xpc_allow_hb(partid_t partid, struct xpc_vars *vars)
-{
- u64 old_mask, new_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(partid_t partid, struct xpc_vars *vars)
-{
- u64 old_mask, new_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);
-}
-
-
-/*
- * 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).
- */
-#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)
-
-
-/*
- * The following structure describes the per partition specific variables.
- *
- * An array of these structures, one per partition, will be defined. As a
- * partition becomes active XPC will copy the array entry corresponding to
- * itself from that partition. It is desirable that the size of this
- * structure evenly divide into a cacheline, such that none of the entries
- * in this array crosses a cacheline boundary. As it is now, each entry
- * occupies half a cacheline.
- */
-struct xpc_vars_part {
- volatile u64 magic;
-
- 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 */
- int IPI_nasid; /* nasid of where to send IPIs */
- int IPI_phys_cpuid; /* physical CPU ID of where to send IPIs */
-
- u8 nchannels; /* #of defined channels supported */
-
- u8 reserved[23]; /* pad to a full 64 bytes */
-};
-
-/*
- * The vars_part MAGIC numbers play a part in the first contact protocol.
- *
- * MAGIC1 indicates that the per partition specific variables for a remote
- * partition have been initialized by this partition.
- *
- * MAGIC2 indicates that this partition has pulled the remote partititions
- * per partition variables that pertain to this partition.
- */
-#define XPC_VP_MAGIC1 0x0053524156435058L /* 'XPCVARS\0'L (little endian) */
-#define XPC_VP_MAGIC2 0x0073726176435058L /* 'XPCvars\0'L (little endian) */
-
-
-/* the reserved page sizes and offsets */
-
-#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)
-
-
-/*
- * Functions registered by add_timer() or called by kernel_thread() only
- * allow for a single 64-bit argument. The following macros can be used to
- * pack and unpack two (32-bit, 16-bit or 8-bit) arguments into or out from
- * the passed argument.
- */
-#define XPC_PACK_ARGS(_arg1, _arg2) \
- ((((u64) _arg1) & 0xffffffff) | \
- ((((u64) _arg2) & 0xffffffff) << 32))
-
-#define XPC_UNPACK_ARG1(_args) (((u64) _args) & 0xffffffff)
-#define XPC_UNPACK_ARG2(_args) ((((u64) _args) >> 32) & 0xffffffff)
-
-
-
-/*
- * Define a Get/Put value pair (pointers) used with a message queue.
- */
-struct xpc_gp {
- volatile s64 get; /* Get value */
- volatile s64 put; /* Put value */
-};
-
-#define XPC_GP_SIZE \
- L1_CACHE_ALIGN(sizeof(struct xpc_gp) * XPC_NCHANNELS)
-
-
-
-/*
- * Define a structure that contains arguments associated with opening and
- * closing a channel.
- */
-struct xpc_openclose_args {
- u16 reason; /* reason why channel is closing */
- u16 msg_size; /* sizeof each message entry */
- u16 remote_nentries; /* #of message entries in remote msg queue */
- u16 local_nentries; /* #of message entries in local msg queue */
- u64 local_msgqueue_pa; /* physical address of local message queue */
-};
-
-#define XPC_OPENCLOSE_ARGS_SIZE \
- L1_CACHE_ALIGN(sizeof(struct xpc_openclose_args) * XPC_NCHANNELS)
-
-
-
-/* struct xpc_msg flags */
-
-#define XPC_M_DONE 0x01 /* msg has been received/consumed */
-#define XPC_M_READY 0x02 /* msg is ready to be sent */
-#define XPC_M_INTERRUPT 0x04 /* send interrupt when msg consumed */
-
-
-#define XPC_MSG_ADDRESS(_payload) \
- ((struct xpc_msg *)((u8 *)(_payload) - XPC_MSG_PAYLOAD_OFFSET))
-
-
-
-/*
- * Defines notify entry.
- *
- * This is used to notify a message's sender that their message was received
- * and consumed by the intended recipient.
- */
-struct xpc_notify {
- volatile u8 type; /* type of notification */
-
- /* the following two fields are only used if type == XPC_N_CALL */
- xpc_notify_func func; /* user's notify function */
- void *key; /* pointer to user's key */
-};
-
-/* struct xpc_notify type of notification */
-
-#define XPC_N_CALL 0x01 /* notify function provided by user */
-
-
-
-/*
- * Define the structure that manages all the stuff required by a channel. In
- * particular, they are used to manage the messages sent across the channel.
- *
- * This structure is private to a partition, and is NOT shared across the
- * partition boundary.
- *
- * There is an array of these structures for each remote partition. It is
- * allocated at the time a partition becomes active. The array contains one
- * of these structures for each potential channel connection to that partition.
- *
- * Each of these structures manages two message queues (circular buffers).
- * They are allocated at the time a channel connection is made. One of
- * these message queues (local_msgqueue) holds the locally created messages
- * that are destined for the remote partition. The other of these message
- * queues (remote_msgqueue) is a locally cached copy of the remote partition's
- * own local_msgqueue.
- *
- * The following is a description of the Get/Put pointers used to manage these
- * two message queues. Consider the local_msgqueue to be on one partition
- * and the remote_msgqueue to be its cached copy on another partition. A
- * description of what each of the lettered areas contains is included.
- *
- *
- * local_msgqueue remote_msgqueue
- *
- * |/////////| |/////////|
- * w_remote_GP.get --> +---------+ |/////////|
- * | F | |/////////|
- * remote_GP.get --> +---------+ +---------+ <-- local_GP->get
- * | | | |
- * | | | E |
- * | | | |
- * | | +---------+ <-- w_local_GP.get
- * | B | |/////////|
- * | | |////D////|
- * | | |/////////|
- * | | +---------+ <-- w_remote_GP.put
- * | | |////C////|
- * local_GP->put --> +---------+ +---------+ <-- remote_GP.put
- * | | |/////////|
- * | A | |/////////|
- * | | |/////////|
- * w_local_GP.put --> +---------+ |/////////|
- * |/////////| |/////////|
- *
- *
- * ( remote_GP.[get|put] are cached copies of the remote
- * partition's local_GP->[get|put], and thus their values can
- * lag behind their counterparts on the remote partition. )
- *
- *
- * A - Messages that have been allocated, but have not yet been sent to the
- * remote partition.
- *
- * B - Messages that have been sent, but have not yet been acknowledged by the
- * remote partition as having been received.
- *
- * C - Area that needs to be prepared for the copying of sent messages, by
- * the clearing of the message flags of any previously received messages.
- *
- * D - Area into which sent messages are to be copied from the remote
- * partition's local_msgqueue and then delivered to their intended
- * recipients. [ To allow for a multi-message copy, another pointer
- * (next_msg_to_pull) has been added to keep track of the next message
- * number needing to be copied (pulled). It chases after w_remote_GP.put.
- * Any messages lying between w_local_GP.get and next_msg_to_pull have
- * been copied and are ready to be delivered. ]
- *
- * E - Messages that have been copied and delivered, but have not yet been
- * acknowledged by the recipient as having been received.
- *
- * F - Messages that have been acknowledged, but XPC has not yet notified the
- * sender that the message was received by its intended recipient.
- * This is also an area that needs to be prepared for the allocating of
- * new messages, by the clearing of the message flags of the acknowledged
- * messages.
- */
-struct xpc_channel {
- partid_t 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 */
- int reason_line; /* line# disconnect initiated from */
-
- u16 number; /* channel # */
-
- u16 msg_size; /* sizeof each msg entry */
- u16 local_nentries; /* #of msg entries in local msg queue */
- u16 remote_nentries; /* #of msg entries in remote msg queue*/
-
- void *local_msgqueue_base; /* base address of kmalloc'd space */
- struct xpc_msg *local_msgqueue; /* local message queue */
- void *remote_msgqueue_base; /* base address of kmalloc'd space */
- struct xpc_msg *remote_msgqueue;/* cached copy of remote partition's */
- /* local message queue */
- u64 remote_msgqueue_pa; /* phys addr of remote partition's */
- /* local message queue */
-
- atomic_t references; /* #of external references to queues */
-
- atomic_t n_on_msg_allocate_wq; /* #on msg allocation wait queue */
- wait_queue_head_t msg_allocate_wq; /* msg allocation wait queue */
-
- u8 delayed_IPI_flags; /* IPI flags received, but delayed */
- /* action until channel disconnected */
-
- /* queue of msg senders who want to be notified when msg received */
-
- atomic_t n_to_notify; /* #of msg senders to notify */
- struct xpc_notify *notify_queue;/* notify queue for messages sent */
-
- xpc_channel_func func; /* user's channel function */
- void *key; /* pointer to user's key */
-
- struct mutex msg_to_pull_mutex; /* next msg to pull serialization */
- struct completion wdisconnect_wait; /* wait for channel disconnect */
-
- struct xpc_openclose_args *local_openclose_args; /* args passed on */
- /* opening or closing of channel */
-
- /* various flavors of local and remote Get/Put values */
-
- struct xpc_gp *local_GP; /* local Get/Put values */
- struct xpc_gp remote_GP; /* remote Get/Put values */
- struct xpc_gp w_local_GP; /* working local Get/Put values */
- struct xpc_gp w_remote_GP; /* working remote Get/Put values */
- s64 next_msg_to_pull; /* Put value of next msg to pull */
-
- /* 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 */
-
-} ____cacheline_aligned;
-
-
-/* struct xpc_channel flags */
-
-#define XPC_C_WASCONNECTED 0x00000001 /* channel was connected */
-
-#define XPC_C_ROPENREPLY 0x00000002 /* remote open channel reply */
-#define XPC_C_OPENREPLY 0x00000004 /* local open channel reply */
-#define XPC_C_ROPENREQUEST 0x00000008 /* remote open channel request */
-#define XPC_C_OPENREQUEST 0x00000010 /* local open channel request */
-
-#define XPC_C_SETUP 0x00000020 /* channel's msgqueues are alloc'd */
-#define XPC_C_CONNECTEDCALLOUT 0x00000040 /* connected callout initiated */
-#define XPC_C_CONNECTEDCALLOUT_MADE \
- 0x00000080 /* connected callout completed */
-#define XPC_C_CONNECTED 0x00000100 /* local channel is connected */
-#define XPC_C_CONNECTING 0x00000200 /* channel is being connected */
-
-#define XPC_C_RCLOSEREPLY 0x00000400 /* remote close channel reply */
-#define XPC_C_CLOSEREPLY 0x00000800 /* local close channel reply */
-#define XPC_C_RCLOSEREQUEST 0x00001000 /* remote close channel request */
-#define XPC_C_CLOSEREQUEST 0x00002000 /* local close channel request */
-
-#define XPC_C_DISCONNECTED 0x00004000 /* channel is disconnected */
-#define XPC_C_DISCONNECTING 0x00008000 /* channel is being disconnected */
-#define XPC_C_DISCONNECTINGCALLOUT \
- 0x00010000 /* disconnecting callout initiated */
-#define XPC_C_DISCONNECTINGCALLOUT_MADE \
- 0x00020000 /* disconnecting callout completed */
-#define XPC_C_WDISCONNECT 0x00040000 /* waiting for channel disconnect */
-
-
-
-/*
- * Manages channels on a partition basis. There is one of these structures
- * for each partition (a partition will never utilize the structure that
- * represents itself).
- */
-struct xpc_partition {
-
- /* XPC HB infrastructure */
-
- u8 remote_rp_version; /* version# of partition's rsvd pg */
- 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 */
- u64 remote_vars_part_pa; /* phys addr of partition's vars part */
- u64 last_heartbeat; /* HB at last read */
- u64 remote_amos_page_pa; /* phys addr of partition's amos page */
- 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 */
- u8 act_state; /* from XPC HB viewpoint */
- u8 remote_vars_version; /* version# of partition's vars */
- enum xpc_retval reason; /* reason partition is deactivating */
- int reason_line; /* line# deactivation initiated from */
- int reactivate_nasid; /* nasid in partition to reactivate */
-
- unsigned long disengage_request_timeout; /* timeout in jiffies */
- struct timer_list disengage_request_timer;
-
-
- /* XPC infrastructure referencing and teardown control */
-
- volatile u8 setup_state; /* infrastructure setup state */
- wait_queue_head_t teardown_wq; /* kthread waiting to teardown infra */
- atomic_t references; /* #of references to infrastructure */
-
-
- /*
- * NONE OF THE PRECEDING FIELDS OF THIS STRUCTURE WILL BE CLEARED WHEN
- * XPC SETS UP THE NECESSARY INFRASTRUCTURE TO SUPPORT CROSS PARTITION
- * COMMUNICATION. ALL OF THE FOLLOWING FIELDS WILL BE CLEARED. (THE
- * 'nchannels' FIELD MUST BE THE FIRST OF THE FIELDS TO BE CLEARED.)
- */
-
-
- u8 nchannels; /* #of defined channels supported */
- atomic_t nchannels_active; /* #of channels that are not DISCONNECTED */
- atomic_t nchannels_engaged;/* #of channels engaged with remote part */
- struct xpc_channel *channels;/* array of channel structures */
-
- void *local_GPs_base; /* base address of kmalloc'd space */
- struct xpc_gp *local_GPs; /* local Get/Put values */
- void *remote_GPs_base; /* base address of kmalloc'd space */
- struct xpc_gp *remote_GPs;/* copy of remote partition's local Get/Put */
- /* values */
- u64 remote_GPs_pa; /* phys address of remote partition's local */
- /* Get/Put values */
-
-
- /* fields used to pass args when opening or closing a channel */
-
- void *local_openclose_args_base; /* base address of kmalloc'd space */
- struct xpc_openclose_args *local_openclose_args; /* local's args */
- void *remote_openclose_args_base; /* base address of kmalloc'd space */
- struct xpc_openclose_args *remote_openclose_args; /* copy of remote's */
- /* args */
- u64 remote_openclose_args_pa; /* phys addr of remote's args */
-
-
- /* IPI sending, receiving and handling related fields */
-
- 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 */
-
- AMO_t *local_IPI_amo_va; /* address of IPI AMO_t structure */
- 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 */
-
- spinlock_t IPI_lock; /* IPI handler lock */
-
-
- /* channel manager related fields */
-
- atomic_t channel_mgr_requests; /* #of requests to activate chan mgr */
- wait_queue_head_t channel_mgr_wq; /* channel mgr's wait queue */
-
-} ____cacheline_aligned;
-
-
-/* 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_DEACTIVATE_PARTITION(_p, _reason) \
- xpc_deactivate_partition(__LINE__, (_p), (_reason))
-
-
-/* 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 */
-
-
-
-/*
- * struct xpc_partition IPI_timer #of seconds to wait before checking for
- * 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)
-
-
-/* number of seconds to wait for other partitions to disengage */
-#define XPC_DISENGAGE_REQUEST_DEFAULT_TIMELIMIT 90
-
-/* interval in seconds to print 'waiting disengagement' messages */
-#define XPC_DISENGAGE_PRINTMSG_INTERVAL 10
-
-
-#define XPC_PARTID(_p) ((partid_t) ((_p) - &xpc_partitions[0]))
-
-
-
-/* found in xp_main.c */
-extern struct xpc_registration xpc_registrations[];
-
-
-/* found in xpc_main.c */
-extern struct device *xpc_part;
-extern struct device *xpc_chan;
-extern int xpc_disengage_request_timelimit;
-extern int xpc_disengage_request_timedout;
-extern irqreturn_t xpc_notify_IRQ_handler(int, void *);
-extern void xpc_dropped_IPI_check(struct xpc_partition *);
-extern void xpc_activate_partition(struct xpc_partition *);
-extern void xpc_activate_kthreads(struct xpc_channel *, int);
-extern void xpc_create_kthreads(struct xpc_channel *, int, int);
-extern void xpc_disconnect_wait(int);
-
-
-/* found in xpc_partition.c */
-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 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 void xpc_mark_partition_inactive(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 *);
-
-
-/* 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 *,
- 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_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);
-extern void xpc_teardown_infrastructure(struct xpc_partition *);
-
-
-
-static inline void
-xpc_wakeup_channel_mgr(struct xpc_partition *part)
-{
- if (atomic_inc_return(&part->channel_mgr_requests) == 1) {
- wake_up(&part->channel_mgr_wq);
- }
-}
-
-
-
-/*
- * These next two inlines are used to keep us from tearing down a channel's
- * msg queues while a thread may be referencing them.
- */
-static inline void
-xpc_msgqueue_ref(struct xpc_channel *ch)
-{
- atomic_inc(&ch->references);
-}
-
-static inline void
-xpc_msgqueue_deref(struct xpc_channel *ch)
-{
- s32 refs = atomic_dec_return(&ch->references);
-
- DBUG_ON(refs < 0);
- if (refs == 0) {
- xpc_wakeup_channel_mgr(&xpc_partitions[ch->partid]);
- }
-}
-
-
-
-#define XPC_DISCONNECT_CHANNEL(_ch, _reason, _irqflgs) \
- xpc_disconnect_channel(__LINE__, _ch, _reason, _irqflgs)
-
-
-/*
- * These two inlines are used to keep us from tearing down a partition's
- * setup infrastructure while a thread may be referencing it.
- */
-static inline void
-xpc_part_deref(struct xpc_partition *part)
-{
- s32 refs = atomic_dec_return(&part->references);
-
-
- DBUG_ON(refs < 0);
- if (refs == 0 && part->setup_state == XPC_P_WTEARDOWN) {
- wake_up(&part->teardown_wq);
- }
-}
-
-static inline int
-xpc_part_ref(struct xpc_partition *part)
-{
- int setup;
-
-
- atomic_inc(&part->references);
- setup = (part->setup_state == XPC_P_SETUP);
- if (!setup) {
- xpc_part_deref(part);
- }
- return setup;
-}
-
-
-
-/*
- * The following macro is to be used for the setting of the reason and
- * reason_line fields in both the struct xpc_channel and struct xpc_partition
- * structures.
- */
-#define XPC_SET_REASON(_p, _reason, _line) \
- { \
- (_p)->reason = _reason; \
- (_p)->reason_line = _line; \
- }
-
-
-
-/*
- * This next set of inlines are used to keep track of when a partition is
- * potentially engaged in accessing memory belonging to another partition.
- */
-
-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);
-
- /* 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);
-}
-
-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);
-
- /* 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);
-}
-
-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);
-
- /* 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);
-}
-
-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);
-
- /* 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);
-}
-
-static inline u64
-xpc_partition_engaged(u64 partid_mask)
-{
- AMO_t *amo = xpc_vars->amos_page + XPC_ENGAGED_PARTITIONS_AMO;
-
-
- /* return our partition's AMO variable ANDed with partid_mask */
- return (FETCHOP_LOAD_OP(TO_AMO((u64) &amo->variable), FETCHOP_LOAD) &
- partid_mask);
-}
-
-static inline u64
-xpc_partition_disengage_requested(u64 partid_mask)
-{
- AMO_t *amo = xpc_vars->amos_page + XPC_DISENGAGE_REQUEST_AMO;
-
-
- /* return our partition's AMO variable ANDed with partid_mask */
- return (FETCHOP_LOAD_OP(TO_AMO((u64) &amo->variable), FETCHOP_LOAD) &
- partid_mask);
-}
-
-static inline void
-xpc_clear_partition_engaged(u64 partid_mask)
-{
- AMO_t *amo = xpc_vars->amos_page + XPC_ENGAGED_PARTITIONS_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);
-}
-
-static inline void
-xpc_clear_partition_disengage_request(u64 partid_mask)
-{
- AMO_t *amo = xpc_vars->amos_page + XPC_DISENGAGE_REQUEST_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);
-}
-
-
-
-/*
- * The following set of macros and inlines are used for the sending and
- * receiving of IPIs (also known as IRQs). There are two flavors of IPIs,
- * one that is associated with partition activity (SGI_XPC_ACTIVATE) and
- * 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.
- */
-
-/*
- * Flag the appropriate AMO variable and send an IPI to the specified node.
- */
-static inline void
-xpc_activate_IRQ_send(u64 amos_page_pa, int from_nasid, int to_nasid,
- int to_phys_cpuid)
-{
- 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);
-}
-
-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);
-}
-
-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);
-}
-
-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);
-}
-
-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);
-}
-
-
-/*
- * IPIs associated with SGI_XPC_NOTIFY IRQ.
- */
-
-/*
- * Send an IPI to the remote partition that is associated with the
- * specified channel.
- */
-#define XPC_NOTIFY_IRQ_SEND(_ch, _ipi_f, _irq_f) \
- xpc_notify_IRQ_send(_ch, _ipi_f, #_ipi_f, _irq_f)
-
-static inline void
-xpc_notify_IRQ_send(struct xpc_channel *ch, u8 ipi_flag, char *ipi_flag_string,
- unsigned long *irq_flags)
-{
- struct xpc_partition *part = &xpc_partitions[ch->partid];
- enum xpc_retval ret;
-
-
- if (likely(part->act_state != XPC_P_DEACTIVATING)) {
- ret = xpc_IPI_send(part->remote_IPI_amo_va,
- (u64) ipi_flag << (ch->number * 8),
- 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);
- }
- }
- }
-}
-
-
-/*
- * Make it look like the remote partition, which is associated with the
- * specified channel, sent us an IPI. This faked IPI will be handled
- * by xpc_dropped_IPI_check().
- */
-#define XPC_NOTIFY_IRQ_SEND_LOCAL(_ch, _ipi_f) \
- xpc_notify_IRQ_send_local(_ch, _ipi_f, #_ipi_f)
-
-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];
-
-
- 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);
-}
-
-
-/*
- * The sending and receiving of IPIs includes the setting of an AMO variable
- * to indicate the reason the IPI was sent. The 64-bit variable is divided
- * up into eight bytes, ordered from right to left. Byte zero pertains to
- * channel 0, byte one to channel 1, and so on. Each byte is described by
- * the following IPI flags.
- */
-
-#define XPC_IPI_CLOSEREQUEST 0x01
-#define XPC_IPI_CLOSEREPLY 0x02
-#define XPC_IPI_OPENREQUEST 0x04
-#define XPC_IPI_OPENREPLY 0x08
-#define XPC_IPI_MSGREQUEST 0x10
-
-
-/* given an AMO variable and a channel#, get its associated IPI flags */
-#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))
-
-
-static inline void
-xpc_IPI_send_closerequest(struct xpc_channel *ch, unsigned long *irq_flags)
-{
- struct xpc_openclose_args *args = ch->local_openclose_args;
-
-
- args->reason = ch->reason;
-
- XPC_NOTIFY_IRQ_SEND(ch, XPC_IPI_CLOSEREQUEST, irq_flags);
-}
-
-static inline void
-xpc_IPI_send_closereply(struct xpc_channel *ch, unsigned long *irq_flags)
-{
- XPC_NOTIFY_IRQ_SEND(ch, XPC_IPI_CLOSEREPLY, irq_flags);
-}
-
-static inline void
-xpc_IPI_send_openrequest(struct xpc_channel *ch, unsigned long *irq_flags)
-{
- struct xpc_openclose_args *args = ch->local_openclose_args;
-
-
- args->msg_size = ch->msg_size;
- args->local_nentries = ch->local_nentries;
-
- XPC_NOTIFY_IRQ_SEND(ch, XPC_IPI_OPENREQUEST, irq_flags);
-}
-
-static inline void
-xpc_IPI_send_openreply(struct xpc_channel *ch, unsigned long *irq_flags)
-{
- struct xpc_openclose_args *args = ch->local_openclose_args;
-
-
- args->remote_nentries = ch->remote_nentries;
- args->local_nentries = ch->local_nentries;
- args->local_msgqueue_pa = __pa(ch->local_msgqueue);
-
- XPC_NOTIFY_IRQ_SEND(ch, XPC_IPI_OPENREPLY, irq_flags);
-}
-
-static inline void
-xpc_IPI_send_msgrequest(struct xpc_channel *ch)
-{
- XPC_NOTIFY_IRQ_SEND(ch, XPC_IPI_MSGREQUEST, NULL);
-}
-
-static inline void
-xpc_IPI_send_local_msgrequest(struct xpc_channel *ch)
-{
- XPC_NOTIFY_IRQ_SEND_LOCAL(ch, XPC_IPI_MSGREQUEST);
-}
-
-
-/*
- * 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 *
-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;
- }
-}
-
-
-
-/*
- * Check to see if there is any channel activity to/from the specified
- * partition.
- */
-static inline void
-xpc_check_for_channel_activity(struct xpc_partition *part)
-{
- u64 IPI_amo;
- unsigned long irq_flags;
-
-
- IPI_amo = xpc_IPI_receive(part->local_IPI_amo_va);
- if (IPI_amo == 0) {
- return;
- }
-
- spin_lock_irqsave(&part->IPI_lock, irq_flags);
- 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);
-
- xpc_wakeup_channel_mgr(part);
-}
-
-
-#endif /* _ASM_IA64_SN_XPC_H */
-