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[IA64-SGI] SGI Altix cross partition functionality (2nd

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This patch contains the shim module (XP) which interfaces between the
communication module (XPC) and the functional support modules (like XPNET).

Signed-off-by: Dean Nelson <dcn@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Dean Nelson 2005-03-23 19:46:00 -07:00 committed by Tony Luck
parent 7fbd2a5337
commit b0d82bd5df
4 changed files with 766 additions and 0 deletions
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10
arch/ia64/Kconfig
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@ -217,6 +217,16 @@ config IA64_SGI_SN_SIM
If you are compiling a kernel that will run under SGI's IA-64
simulator (Medusa) then say Y, otherwise say N.
config IA64_SGI_SN_XP
tristate "Support communication between SGI SSIs"
depends on MSPEC
help
An SGI machine can be divided into multiple Single System
Images which act independently of each other and have
hardware based memory protection from the others. Enabling
this feature will allow for direct communication between SSIs
based on a network adapter and DMA messaging.
config FORCE_MAX_ZONEORDER
int
default "18"

289
arch/ia64/sn/kernel/xp_main.c Normal file
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@ -0,0 +1,289 @@
/*
* 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.
*/
/*
* Cross Partition (XP) base.
*
* XP provides a base from which its users can interact
* with XPC, yet not be dependent on XPC.
*
*/
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <asm/sn/intr.h>
#include <asm/sn/sn_sal.h>
#include <asm/sn/xp.h>
/*
* Target of nofault PIO read.
*/
u64 xp_nofault_PIOR_target;
/*
* xpc_registrations[] keeps track of xpc_connect()'s done by the kernel-level
* users of XPC.
*/
struct xpc_registration xpc_registrations[XPC_NCHANNELS];
/*
* Initialize the XPC interface to indicate that XPC isn't loaded.
*/
static enum xpc_retval xpc_notloaded(void) { return xpcNotLoaded; }
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 *))
xpc_notloaded,
(void (*)(partid_t, int, void *)) xpc_notloaded,
(enum xpc_retval (*)(partid_t, void *)) xpc_notloaded
};
/*
* XPC calls this when it (the XPC module) has been loaded.
*/
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 *,
xpc_notify_func, void *),
void (*received)(partid_t, int, void *),
enum xpc_retval (*partid_to_nasids)(partid_t, void *))
{
xpc_interface.connect = connect;
xpc_interface.disconnect = disconnect;
xpc_interface.allocate = allocate;
xpc_interface.send = send;
xpc_interface.send_notify = send_notify;
xpc_interface.received = received;
xpc_interface.partid_to_nasids = partid_to_nasids;
}
/*
* XPC calls this when it (the XPC module) is being unloaded.
*/
void
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,
void **)) xpc_notloaded;
xpc_interface.send = (enum xpc_retval (*)(partid_t, int, void *))
xpc_notloaded;
xpc_interface.send_notify = (enum xpc_retval (*)(partid_t, int, void *,
xpc_notify_func, void *)) xpc_notloaded;
xpc_interface.received = (void (*)(partid_t, int, void *))
xpc_notloaded;
xpc_interface.partid_to_nasids = (enum xpc_retval (*)(partid_t, void *))
xpc_notloaded;
}
/*
* Register for automatic establishment of a channel connection whenever
* a partition comes up.
*
* Arguments:
*
* ch_number - channel # to register for connection.
* func - function to call for asynchronous notification of channel
* state changes (i.e., connection, disconnection, error) and
* the arrival of incoming messages.
* key - pointer to optional user-defined value that gets passed back
* to the user on any callouts made to func.
* payload_size - size in bytes of the XPC message's payload area which
* contains a user-defined message. The user should make
* this large enough to hold their largest message.
* nentries - max #of XPC message entries a message queue can contain.
* The actual number, which is determined when a connection
* is established and may be less then requested, will be
* passed to the user via the xpcConnected 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
xpc_connect(int ch_number, xpc_channel_func func, void *key, u16 payload_size,
u16 nentries, u32 assigned_limit, u32 idle_limit)
{
struct xpc_registration *registration;
DBUG_ON(ch_number < 0 || ch_number >= XPC_NCHANNELS);
DBUG_ON(payload_size == 0 || nentries == 0);
DBUG_ON(func == NULL);
DBUG_ON(assigned_limit == 0 || idle_limit > assigned_limit);
registration = &xpc_registrations[ch_number];
if (down_interruptible(&registration->sema) != 0) {
return xpcInterrupted;
}
/* if XPC_CHANNEL_REGISTERED(ch_number) */
if (registration->func != NULL) {
up(&registration->sema);
return xpcAlreadyRegistered;
}
/* register the channel for connection */
registration->msg_size = XPC_MSG_SIZE(payload_size);
registration->nentries = nentries;
registration->assigned_limit = assigned_limit;
registration->idle_limit = idle_limit;
registration->key = key;
registration->func = func;
up(&registration->sema);
xpc_interface.connect(ch_number);
return xpcSuccess;
}
/*
* Remove the registration for automatic connection of the specified channel
* when a partition comes up.
*
* Before returning this xpc_disconnect() will wait for all connections on the
* specified channel have been closed/torndown. So the caller can be assured
* that they will not be receiving any more callouts from XPC to their
* function registered via xpc_connect().
*
* Arguments:
*
* ch_number - channel # to unregister.
*/
void
xpc_disconnect(int ch_number)
{
struct xpc_registration *registration;
DBUG_ON(ch_number < 0 || ch_number >= XPC_NCHANNELS);
registration = &xpc_registrations[ch_number];
/*
* We've decided not to make this a down_interruptible(), since we
* figured XPC's users will just turn around and call xpc_disconnect()
* again anyways, so we might as well wait, if need be.
*/
down(&registration->sema);
/* if !XPC_CHANNEL_REGISTERED(ch_number) */
if (registration->func == NULL) {
up(&registration->sema);
return;
}
/* remove the connection registration for the specified channel */
registration->func = NULL;
registration->key = NULL;
registration->nentries = 0;
registration->msg_size = 0;
registration->assigned_limit = 0;
registration->idle_limit = 0;
xpc_interface.disconnect(ch_number);
up(&registration->sema);
return;
}
int __init
xp_init(void)
{
int ret, ch_number;
u64 func_addr = *(u64 *) xp_nofault_PIOR;
u64 err_func_addr = *(u64 *) xp_error_PIOR;
if (!ia64_platform_is("sn2")) {
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 semaphores */
for (ch_number = 0; ch_number < XPC_NCHANNELS; ch_number++) {
sema_init(&xpc_registrations[ch_number].sema, 1); /* mutex */
}
return 0;
}
module_init(xp_init);
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);
}
module_exit(xp_exit);
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(xpc_registrations);
EXPORT_SYMBOL(xpc_interface);
EXPORT_SYMBOL(xpc_clear_interface);
EXPORT_SYMBOL(xpc_set_interface);
EXPORT_SYMBOL(xpc_connect);
EXPORT_SYMBOL(xpc_disconnect);

31
arch/ia64/sn/kernel/xp_nofault.S Normal file
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@ -0,0 +1,31 @@
/*
* 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.
*/
/*
* The xp_nofault_PIOR function takes a pointer to a remote PIO register
* and attempts to load and consume a value from it. This function
* will be registered as a nofault code block. In the event that the
* PIO read fails, the MCA handler will force the error to look
* corrected and vector to the xp_error_PIOR which will return an error.
*
* extern int xp_nofault_PIOR(void *remote_register);
*/
.global xp_nofault_PIOR
xp_nofault_PIOR:
mov r8=r0 // Stage a success return value
ld8.acq r9=[r32];; // PIO Read the specified register
adds r9=1,r9 // Add to force a consume
br.ret.sptk.many b0;; // Return success
.global xp_error_PIOR
xp_error_PIOR:
mov r8=1 // Return value of 1
br.ret.sptk.many b0;; // Return failure

436
include/asm-ia64/sn/xp.h Normal file
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@ -0,0 +1,436 @@
/*
* 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/version.h>
#include <linux/cache.h>
#include <linux/hardirq.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_PHYSNODE_ID / 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).
*
* See bte_copy for definition of the input parameters.
*
* Note: xp_bte_copy() should never be called while holding a spinlock.
*/
static inline bte_result_t
xp_bte_copy(u64 src, u64 dest, u64 len, u64 mode, void *notification)
{
bte_result_t ret;
ret = bte_copy(src, dest, len, mode, notification);
if (ret != BTE_SUCCESS) {
if (!in_interrupt()) {
cond_resched();
}
ret = bte_copy(src, dest, 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 */
xpcUnknownReason /* 44: 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 incomming 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 semaphore sema;
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 */