463 lines
18 KiB
C
463 lines
18 KiB
C
/*
|
|
* 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) {
|
|
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) */
|
|
|
|
xpcUnknownReason /* 52: 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 */
|
|
|