* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * Copyright (c) 2004-2008 Silicon Graphics, Inc. All Rights Reserved.
+ * Copyright (c) 2004-2009 Silicon Graphics, Inc. All Rights Reserved.
*/
/*
*
*/
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/sched.h>
-#include <linux/cache.h>
-#include <linux/interrupt.h>
-#include <linux/mutex.h>
-#include <linux/completion.h>
-#include <asm/sn/sn_sal.h>
+#include <linux/device.h>
#include "xpc.h"
/*
- * Guarantee that the kzalloc'd memory is cacheline aligned.
- */
-void *
-xpc_kzalloc_cacheline_aligned(size_t size, gfp_t flags, void **base)
-{
- /* see if kzalloc will give us cachline aligned memory by default */
- *base = kzalloc(size, flags);
- if (*base == NULL)
- return NULL;
-
- if ((u64)*base == L1_CACHE_ALIGN((u64)*base))
- return *base;
-
- kfree(*base);
-
- /* nope, we'll have to do it ourselves */
- *base = kzalloc(size + L1_CACHE_BYTES, flags);
- if (*base == NULL)
- return NULL;
-
- return (void *)L1_CACHE_ALIGN((u64)*base);
-}
-
-/*
- * Allocate the local message queue and the notify queue.
- */
-static enum xp_retval
-xpc_allocate_local_msgqueue(struct xpc_channel *ch)
-{
- unsigned long irq_flags;
- int nentries;
- size_t nbytes;
-
- for (nentries = ch->local_nentries; nentries > 0; nentries--) {
-
- nbytes = nentries * ch->msg_size;
- ch->local_msgqueue = xpc_kzalloc_cacheline_aligned(nbytes,
- GFP_KERNEL,
- &ch->local_msgqueue_base);
- if (ch->local_msgqueue == NULL)
- continue;
-
- nbytes = nentries * sizeof(struct xpc_notify);
- ch->notify_queue = kzalloc(nbytes, GFP_KERNEL);
- if (ch->notify_queue == NULL) {
- kfree(ch->local_msgqueue_base);
- ch->local_msgqueue = NULL;
- continue;
- }
-
- spin_lock_irqsave(&ch->lock, irq_flags);
- if (nentries < ch->local_nentries) {
- dev_dbg(xpc_chan, "nentries=%d local_nentries=%d, "
- "partid=%d, channel=%d\n", nentries,
- ch->local_nentries, ch->partid, ch->number);
-
- ch->local_nentries = nentries;
- }
- spin_unlock_irqrestore(&ch->lock, irq_flags);
- return xpSuccess;
- }
-
- dev_dbg(xpc_chan, "can't get memory for local message queue and notify "
- "queue, partid=%d, channel=%d\n", ch->partid, ch->number);
- return xpNoMemory;
-}
-
-/*
- * Allocate the cached remote message queue.
- */
-static enum xp_retval
-xpc_allocate_remote_msgqueue(struct xpc_channel *ch)
-{
- unsigned long irq_flags;
- int nentries;
- size_t nbytes;
-
- DBUG_ON(ch->remote_nentries <= 0);
-
- for (nentries = ch->remote_nentries; nentries > 0; nentries--) {
-
- nbytes = nentries * ch->msg_size;
- ch->remote_msgqueue = xpc_kzalloc_cacheline_aligned(nbytes,
- GFP_KERNEL,
- &ch->remote_msgqueue_base);
- if (ch->remote_msgqueue == NULL)
- continue;
-
- spin_lock_irqsave(&ch->lock, irq_flags);
- if (nentries < ch->remote_nentries) {
- dev_dbg(xpc_chan, "nentries=%d remote_nentries=%d, "
- "partid=%d, channel=%d\n", nentries,
- ch->remote_nentries, ch->partid, ch->number);
-
- ch->remote_nentries = nentries;
- }
- spin_unlock_irqrestore(&ch->lock, irq_flags);
- return xpSuccess;
- }
-
- dev_dbg(xpc_chan, "can't get memory for cached remote message queue, "
- "partid=%d, channel=%d\n", ch->partid, ch->number);
- return xpNoMemory;
-}
-
-/*
- * Allocate message queues and other stuff associated with a channel.
- *
- * Note: Assumes all of the channel sizes are filled in.
- */
-static enum xp_retval
-xpc_allocate_msgqueues(struct xpc_channel *ch)
-{
- unsigned long irq_flags;
- enum xp_retval ret;
-
- DBUG_ON(ch->flags & XPC_C_SETUP);
-
- ret = xpc_allocate_local_msgqueue(ch);
- if (ret != xpSuccess)
- return ret;
-
- ret = xpc_allocate_remote_msgqueue(ch);
- if (ret != xpSuccess) {
- kfree(ch->local_msgqueue_base);
- ch->local_msgqueue = NULL;
- kfree(ch->notify_queue);
- ch->notify_queue = NULL;
- return ret;
- }
-
- spin_lock_irqsave(&ch->lock, irq_flags);
- ch->flags |= XPC_C_SETUP;
- spin_unlock_irqrestore(&ch->lock, irq_flags);
-
- return xpSuccess;
-}
-
-/*
* Process a connect message from a remote partition.
*
* Note: xpc_process_connect() is expecting to be called with the
if (!(ch->flags & XPC_C_SETUP)) {
spin_unlock_irqrestore(&ch->lock, *irq_flags);
- ret = xpc_allocate_msgqueues(ch);
+ ret = xpc_arch_ops.setup_msg_structures(ch);
spin_lock_irqsave(&ch->lock, *irq_flags);
if (ret != xpSuccess)
XPC_DISCONNECT_CHANNEL(ch, ret, irq_flags);
+ else
+ ch->flags |= XPC_C_SETUP;
- if (ch->flags & (XPC_C_CONNECTED | XPC_C_DISCONNECTING))
+ if (ch->flags & XPC_C_DISCONNECTING)
return;
-
- DBUG_ON(!(ch->flags & XPC_C_SETUP));
- DBUG_ON(ch->local_msgqueue == NULL);
- DBUG_ON(ch->remote_msgqueue == NULL);
}
if (!(ch->flags & XPC_C_OPENREPLY)) {
ch->flags |= XPC_C_OPENREPLY;
- xpc_IPI_send_openreply(ch, irq_flags);
+ xpc_arch_ops.send_chctl_openreply(ch, irq_flags);
}
if (!(ch->flags & XPC_C_ROPENREPLY))
return;
- DBUG_ON(ch->remote_msgqueue_pa == 0);
+ if (!(ch->flags & XPC_C_OPENCOMPLETE)) {
+ ch->flags |= (XPC_C_OPENCOMPLETE | XPC_C_CONNECTED);
+ xpc_arch_ops.send_chctl_opencomplete(ch, irq_flags);
+ }
- ch->flags = (XPC_C_CONNECTED | XPC_C_SETUP); /* clear all else */
+ if (!(ch->flags & XPC_C_ROPENCOMPLETE))
+ return;
dev_info(xpc_chan, "channel %d to partition %d connected\n",
ch->number, ch->partid);
- spin_unlock_irqrestore(&ch->lock, *irq_flags);
- xpc_create_kthreads(ch, 1, 0);
- spin_lock_irqsave(&ch->lock, *irq_flags);
-}
-
-/*
- * Notify those who wanted to be notified upon delivery of their message.
- */
-static void
-xpc_notify_senders(struct xpc_channel *ch, enum xp_retval reason, s64 put)
-{
- struct xpc_notify *notify;
- u8 notify_type;
- s64 get = ch->w_remote_GP.get - 1;
-
- while (++get < put && atomic_read(&ch->n_to_notify) > 0) {
-
- notify = &ch->notify_queue[get % ch->local_nentries];
-
- /*
- * See if the notify entry indicates it was associated with
- * a message who's sender wants to be notified. It is possible
- * that it is, but someone else is doing or has done the
- * notification.
- */
- notify_type = notify->type;
- if (notify_type == 0 ||
- cmpxchg(¬ify->type, notify_type, 0) != notify_type) {
- continue;
- }
-
- DBUG_ON(notify_type != XPC_N_CALL);
-
- atomic_dec(&ch->n_to_notify);
-
- if (notify->func != NULL) {
- dev_dbg(xpc_chan, "notify->func() called, notify=0x%p, "
- "msg_number=%ld, partid=%d, channel=%d\n",
- (void *)notify, get, ch->partid, ch->number);
-
- notify->func(reason, ch->partid, ch->number,
- notify->key);
-
- dev_dbg(xpc_chan, "notify->func() returned, "
- "notify=0x%p, msg_number=%ld, partid=%d, "
- "channel=%d\n", (void *)notify, get,
- ch->partid, ch->number);
- }
- }
-}
-
-/*
- * Free up message queues and other stuff that were allocated for the specified
- * channel.
- *
- * Note: ch->reason and ch->reason_line are left set for debugging purposes,
- * they're cleared when XPC_C_DISCONNECTED is cleared.
- */
-static void
-xpc_free_msgqueues(struct xpc_channel *ch)
-{
- DBUG_ON(!spin_is_locked(&ch->lock));
- DBUG_ON(atomic_read(&ch->n_to_notify) != 0);
-
- ch->remote_msgqueue_pa = 0;
- ch->func = NULL;
- ch->key = NULL;
- ch->msg_size = 0;
- ch->local_nentries = 0;
- ch->remote_nentries = 0;
- ch->kthreads_assigned_limit = 0;
- ch->kthreads_idle_limit = 0;
-
- ch->local_GP->get = 0;
- ch->local_GP->put = 0;
- ch->remote_GP.get = 0;
- ch->remote_GP.put = 0;
- ch->w_local_GP.get = 0;
- ch->w_local_GP.put = 0;
- ch->w_remote_GP.get = 0;
- ch->w_remote_GP.put = 0;
- ch->next_msg_to_pull = 0;
-
- if (ch->flags & XPC_C_SETUP) {
- ch->flags &= ~XPC_C_SETUP;
-
- dev_dbg(xpc_chan, "ch->flags=0x%x, partid=%d, channel=%d\n",
- ch->flags, ch->partid, ch->number);
-
- kfree(ch->local_msgqueue_base);
- ch->local_msgqueue = NULL;
- kfree(ch->remote_msgqueue_base);
- ch->remote_msgqueue = NULL;
- kfree(ch->notify_queue);
- ch->notify_queue = NULL;
- }
+ ch->flags = (XPC_C_CONNECTED | XPC_C_SETUP); /* clear all else */
}
/*
DBUG_ON((ch->flags & XPC_C_CONNECTEDCALLOUT_MADE) &&
!(ch->flags & XPC_C_DISCONNECTINGCALLOUT_MADE));
- if (part->act_state == XPC_P_DEACTIVATING) {
+ if (part->act_state == XPC_P_AS_DEACTIVATING) {
/* can't proceed until the other side disengages from us */
- if (xpc_partition_engaged(1UL << ch->partid))
+ if (xpc_arch_ops.partition_engaged(ch->partid))
return;
} else {
if (!(ch->flags & XPC_C_CLOSEREPLY)) {
ch->flags |= XPC_C_CLOSEREPLY;
- xpc_IPI_send_closereply(ch, irq_flags);
+ xpc_arch_ops.send_chctl_closereply(ch, irq_flags);
}
if (!(ch->flags & XPC_C_RCLOSEREPLY))
/* wake those waiting for notify completion */
if (atomic_read(&ch->n_to_notify) > 0) {
- /* >>> we do callout while holding ch->lock */
- xpc_notify_senders(ch, ch->reason, ch->w_local_GP.put);
+ /* we do callout while holding ch->lock, callout can't block */
+ xpc_arch_ops.notify_senders_of_disconnect(ch);
}
/* both sides are disconnected now */
spin_lock_irqsave(&ch->lock, *irq_flags);
}
+ DBUG_ON(atomic_read(&ch->n_to_notify) != 0);
+
/* it's now safe to free the channel's message queues */
- xpc_free_msgqueues(ch);
+ xpc_arch_ops.teardown_msg_structures(ch);
+
+ ch->func = NULL;
+ ch->key = NULL;
+ ch->entry_size = 0;
+ ch->local_nentries = 0;
+ ch->remote_nentries = 0;
+ ch->kthreads_assigned_limit = 0;
+ ch->kthreads_idle_limit = 0;
- /* mark disconnected, clear all other flags except XPC_C_WDISCONNECT */
+ /*
+ * Mark the channel disconnected and clear all other flags, including
+ * XPC_C_SETUP (because of call to
+ * xpc_arch_ops.teardown_msg_structures()) but not including
+ * XPC_C_WDISCONNECT (if it was set).
+ */
ch->flags = (XPC_C_DISCONNECTED | (ch->flags & XPC_C_WDISCONNECT));
atomic_dec(&part->nchannels_active);
if (ch->flags & XPC_C_WDISCONNECT) {
/* we won't lose the CPU since we're holding ch->lock */
complete(&ch->wdisconnect_wait);
- } else if (ch->delayed_IPI_flags) {
- if (part->act_state != XPC_P_DEACTIVATING) {
- /* time to take action on any delayed IPI flags */
- spin_lock(&part->IPI_lock);
- XPC_SET_IPI_FLAGS(part->local_IPI_amo, ch->number,
- ch->delayed_IPI_flags);
- spin_unlock(&part->IPI_lock);
+ } else if (ch->delayed_chctl_flags) {
+ if (part->act_state != XPC_P_AS_DEACTIVATING) {
+ /* time to take action on any delayed chctl flags */
+ spin_lock(&part->chctl_lock);
+ part->chctl.flags[ch->number] |=
+ ch->delayed_chctl_flags;
+ spin_unlock(&part->chctl_lock);
}
- ch->delayed_IPI_flags = 0;
+ ch->delayed_chctl_flags = 0;
}
}
* Process a change in the channel's remote connection state.
*/
static void
-xpc_process_openclose_IPI(struct xpc_partition *part, int ch_number,
- u8 IPI_flags)
+xpc_process_openclose_chctl_flags(struct xpc_partition *part, int ch_number,
+ u8 chctl_flags)
{
unsigned long irq_flags;
struct xpc_openclose_args *args =
&part->remote_openclose_args[ch_number];
struct xpc_channel *ch = &part->channels[ch_number];
enum xp_retval reason;
+ enum xp_retval ret;
+ int create_kthread = 0;
spin_lock_irqsave(&ch->lock, irq_flags);
if ((ch->flags & XPC_C_DISCONNECTED) &&
(ch->flags & XPC_C_WDISCONNECT)) {
/*
- * Delay processing IPI flags until thread waiting disconnect
+ * Delay processing chctl flags until thread waiting disconnect
* has had a chance to see that the channel is disconnected.
*/
- ch->delayed_IPI_flags |= IPI_flags;
- spin_unlock_irqrestore(&ch->lock, irq_flags);
- return;
+ ch->delayed_chctl_flags |= chctl_flags;
+ goto out;
}
- if (IPI_flags & XPC_IPI_CLOSEREQUEST) {
+ if (chctl_flags & XPC_CHCTL_CLOSEREQUEST) {
- dev_dbg(xpc_chan, "XPC_IPI_CLOSEREQUEST (reason=%d) received "
+ dev_dbg(xpc_chan, "XPC_CHCTL_CLOSEREQUEST (reason=%d) received "
"from partid=%d, channel=%d\n", args->reason,
ch->partid, ch->number);
/*
* If RCLOSEREQUEST is set, we're probably waiting for
* RCLOSEREPLY. We should find it and a ROPENREQUEST packed
- * with this RCLOSEREQUEST in the IPI_flags.
+ * with this RCLOSEREQUEST in the chctl_flags.
*/
if (ch->flags & XPC_C_RCLOSEREQUEST) {
DBUG_ON(!(ch->flags & XPC_C_CLOSEREPLY));
DBUG_ON(ch->flags & XPC_C_RCLOSEREPLY);
- DBUG_ON(!(IPI_flags & XPC_IPI_CLOSEREPLY));
- IPI_flags &= ~XPC_IPI_CLOSEREPLY;
+ DBUG_ON(!(chctl_flags & XPC_CHCTL_CLOSEREPLY));
+ chctl_flags &= ~XPC_CHCTL_CLOSEREPLY;
ch->flags |= XPC_C_RCLOSEREPLY;
/* both sides have finished disconnecting */
}
if (ch->flags & XPC_C_DISCONNECTED) {
- if (!(IPI_flags & XPC_IPI_OPENREQUEST)) {
- if ((XPC_GET_IPI_FLAGS(part->local_IPI_amo,
- ch_number) &
- XPC_IPI_OPENREQUEST)) {
-
- DBUG_ON(ch->delayed_IPI_flags != 0);
- spin_lock(&part->IPI_lock);
- XPC_SET_IPI_FLAGS(part->local_IPI_amo,
- ch_number,
- XPC_IPI_CLOSEREQUEST);
- spin_unlock(&part->IPI_lock);
+ if (!(chctl_flags & XPC_CHCTL_OPENREQUEST)) {
+ if (part->chctl.flags[ch_number] &
+ XPC_CHCTL_OPENREQUEST) {
+
+ DBUG_ON(ch->delayed_chctl_flags != 0);
+ spin_lock(&part->chctl_lock);
+ part->chctl.flags[ch_number] |=
+ XPC_CHCTL_CLOSEREQUEST;
+ spin_unlock(&part->chctl_lock);
}
- spin_unlock_irqrestore(&ch->lock, irq_flags);
- return;
+ goto out;
}
XPC_SET_REASON(ch, 0, 0);
ch->flags |= (XPC_C_CONNECTING | XPC_C_ROPENREQUEST);
}
- IPI_flags &= ~(XPC_IPI_OPENREQUEST | XPC_IPI_OPENREPLY);
+ chctl_flags &= ~(XPC_CHCTL_OPENREQUEST | XPC_CHCTL_OPENREPLY |
+ XPC_CHCTL_OPENCOMPLETE);
/*
* The meaningful CLOSEREQUEST connection state fields are:
XPC_DISCONNECT_CHANNEL(ch, reason, &irq_flags);
- DBUG_ON(IPI_flags & XPC_IPI_CLOSEREPLY);
- spin_unlock_irqrestore(&ch->lock, irq_flags);
- return;
+ DBUG_ON(chctl_flags & XPC_CHCTL_CLOSEREPLY);
+ goto out;
}
xpc_process_disconnect(ch, &irq_flags);
}
- if (IPI_flags & XPC_IPI_CLOSEREPLY) {
+ if (chctl_flags & XPC_CHCTL_CLOSEREPLY) {
- dev_dbg(xpc_chan, "XPC_IPI_CLOSEREPLY received from partid=%d,"
- " channel=%d\n", ch->partid, ch->number);
+ dev_dbg(xpc_chan, "XPC_CHCTL_CLOSEREPLY received from partid="
+ "%d, channel=%d\n", ch->partid, ch->number);
if (ch->flags & XPC_C_DISCONNECTED) {
- DBUG_ON(part->act_state != XPC_P_DEACTIVATING);
- spin_unlock_irqrestore(&ch->lock, irq_flags);
- return;
+ DBUG_ON(part->act_state != XPC_P_AS_DEACTIVATING);
+ goto out;
}
DBUG_ON(!(ch->flags & XPC_C_CLOSEREQUEST));
if (!(ch->flags & XPC_C_RCLOSEREQUEST)) {
- if ((XPC_GET_IPI_FLAGS(part->local_IPI_amo, ch_number)
- & XPC_IPI_CLOSEREQUEST)) {
-
- DBUG_ON(ch->delayed_IPI_flags != 0);
- spin_lock(&part->IPI_lock);
- XPC_SET_IPI_FLAGS(part->local_IPI_amo,
- ch_number,
- XPC_IPI_CLOSEREPLY);
- spin_unlock(&part->IPI_lock);
+ if (part->chctl.flags[ch_number] &
+ XPC_CHCTL_CLOSEREQUEST) {
+
+ DBUG_ON(ch->delayed_chctl_flags != 0);
+ spin_lock(&part->chctl_lock);
+ part->chctl.flags[ch_number] |=
+ XPC_CHCTL_CLOSEREPLY;
+ spin_unlock(&part->chctl_lock);
}
- spin_unlock_irqrestore(&ch->lock, irq_flags);
- return;
+ goto out;
}
ch->flags |= XPC_C_RCLOSEREPLY;
}
}
- if (IPI_flags & XPC_IPI_OPENREQUEST) {
+ if (chctl_flags & XPC_CHCTL_OPENREQUEST) {
- dev_dbg(xpc_chan, "XPC_IPI_OPENREQUEST (msg_size=%d, "
+ dev_dbg(xpc_chan, "XPC_CHCTL_OPENREQUEST (entry_size=%d, "
"local_nentries=%d) received from partid=%d, "
- "channel=%d\n", args->msg_size, args->local_nentries,
+ "channel=%d\n", args->entry_size, args->local_nentries,
ch->partid, ch->number);
- if (part->act_state == XPC_P_DEACTIVATING ||
+ if (part->act_state == XPC_P_AS_DEACTIVATING ||
(ch->flags & XPC_C_ROPENREQUEST)) {
- spin_unlock_irqrestore(&ch->lock, irq_flags);
- return;
+ goto out;
}
if (ch->flags & (XPC_C_DISCONNECTING | XPC_C_WDISCONNECT)) {
- ch->delayed_IPI_flags |= XPC_IPI_OPENREQUEST;
- spin_unlock_irqrestore(&ch->lock, irq_flags);
- return;
+ ch->delayed_chctl_flags |= XPC_CHCTL_OPENREQUEST;
+ goto out;
}
DBUG_ON(!(ch->flags & (XPC_C_DISCONNECTED |
XPC_C_OPENREQUEST)));
/*
* The meaningful OPENREQUEST connection state fields are:
- * msg_size = size of channel's messages in bytes
+ * entry_size = size of channel's messages in bytes
* local_nentries = remote partition's local_nentries
*/
- if (args->msg_size == 0 || args->local_nentries == 0) {
+ if (args->entry_size == 0 || args->local_nentries == 0) {
/* assume OPENREQUEST was delayed by mistake */
- spin_unlock_irqrestore(&ch->lock, irq_flags);
- return;
+ goto out;
}
ch->flags |= (XPC_C_ROPENREQUEST | XPC_C_CONNECTING);
ch->remote_nentries = args->local_nentries;
if (ch->flags & XPC_C_OPENREQUEST) {
- if (args->msg_size != ch->msg_size) {
+ if (args->entry_size != ch->entry_size) {
XPC_DISCONNECT_CHANNEL(ch, xpUnequalMsgSizes,
&irq_flags);
- spin_unlock_irqrestore(&ch->lock, irq_flags);
- return;
+ goto out;
}
} else {
- ch->msg_size = args->msg_size;
+ ch->entry_size = args->entry_size;
XPC_SET_REASON(ch, 0, 0);
ch->flags &= ~XPC_C_DISCONNECTED;
xpc_process_connect(ch, &irq_flags);
}
- if (IPI_flags & XPC_IPI_OPENREPLY) {
+ if (chctl_flags & XPC_CHCTL_OPENREPLY) {
- dev_dbg(xpc_chan, "XPC_IPI_OPENREPLY (local_msgqueue_pa=0x%lx, "
- "local_nentries=%d, remote_nentries=%d) received from "
- "partid=%d, channel=%d\n", args->local_msgqueue_pa,
- args->local_nentries, args->remote_nentries,
- ch->partid, ch->number);
+ dev_dbg(xpc_chan, "XPC_CHCTL_OPENREPLY (local_msgqueue_pa="
+ "0x%lx, local_nentries=%d, remote_nentries=%d) "
+ "received from partid=%d, channel=%d\n",
+ args->local_msgqueue_pa, args->local_nentries,
+ args->remote_nentries, ch->partid, ch->number);
+
+ if (ch->flags & (XPC_C_DISCONNECTING | XPC_C_DISCONNECTED))
+ goto out;
- if (ch->flags & (XPC_C_DISCONNECTING | XPC_C_DISCONNECTED)) {
- spin_unlock_irqrestore(&ch->lock, irq_flags);
- return;
- }
if (!(ch->flags & XPC_C_OPENREQUEST)) {
XPC_DISCONNECT_CHANNEL(ch, xpOpenCloseError,
&irq_flags);
- spin_unlock_irqrestore(&ch->lock, irq_flags);
- return;
+ goto out;
}
DBUG_ON(!(ch->flags & XPC_C_ROPENREQUEST));
DBUG_ON(args->local_nentries == 0);
DBUG_ON(args->remote_nentries == 0);
+ ret = xpc_arch_ops.save_remote_msgqueue_pa(ch,
+ args->local_msgqueue_pa);
+ if (ret != xpSuccess) {
+ XPC_DISCONNECT_CHANNEL(ch, ret, &irq_flags);
+ goto out;
+ }
ch->flags |= XPC_C_ROPENREPLY;
- ch->remote_msgqueue_pa = args->local_msgqueue_pa;
if (args->local_nentries < ch->remote_nentries) {
- dev_dbg(xpc_chan, "XPC_IPI_OPENREPLY: new "
+ dev_dbg(xpc_chan, "XPC_CHCTL_OPENREPLY: new "
"remote_nentries=%d, old remote_nentries=%d, "
"partid=%d, channel=%d\n",
args->local_nentries, ch->remote_nentries,
ch->remote_nentries = args->local_nentries;
}
if (args->remote_nentries < ch->local_nentries) {
- dev_dbg(xpc_chan, "XPC_IPI_OPENREPLY: new "
+ dev_dbg(xpc_chan, "XPC_CHCTL_OPENREPLY: new "
"local_nentries=%d, old local_nentries=%d, "
"partid=%d, channel=%d\n",
args->remote_nentries, ch->local_nentries,
xpc_process_connect(ch, &irq_flags);
}
+ if (chctl_flags & XPC_CHCTL_OPENCOMPLETE) {
+
+ dev_dbg(xpc_chan, "XPC_CHCTL_OPENCOMPLETE received from "
+ "partid=%d, channel=%d\n", ch->partid, ch->number);
+
+ if (ch->flags & (XPC_C_DISCONNECTING | XPC_C_DISCONNECTED))
+ goto out;
+
+ if (!(ch->flags & XPC_C_OPENREQUEST) ||
+ !(ch->flags & XPC_C_OPENREPLY)) {
+ XPC_DISCONNECT_CHANNEL(ch, xpOpenCloseError,
+ &irq_flags);
+ goto out;
+ }
+
+ DBUG_ON(!(ch->flags & XPC_C_ROPENREQUEST));
+ DBUG_ON(!(ch->flags & XPC_C_ROPENREPLY));
+ DBUG_ON(!(ch->flags & XPC_C_CONNECTED));
+
+ ch->flags |= XPC_C_ROPENCOMPLETE;
+
+ xpc_process_connect(ch, &irq_flags);
+ create_kthread = 1;
+ }
+
+out:
spin_unlock_irqrestore(&ch->lock, irq_flags);
+
+ if (create_kthread)
+ xpc_create_kthreads(ch, 1, 0);
}
/*
ch->local_nentries = registration->nentries;
if (ch->flags & XPC_C_ROPENREQUEST) {
- if (registration->msg_size != ch->msg_size) {
+ if (registration->entry_size != ch->entry_size) {
/* the local and remote sides aren't the same */
/*
return xpUnequalMsgSizes;
}
} else {
- ch->msg_size = registration->msg_size;
+ ch->entry_size = registration->entry_size;
XPC_SET_REASON(ch, 0, 0);
ch->flags &= ~XPC_C_DISCONNECTED;
/* initiate the connection */
ch->flags |= (XPC_C_OPENREQUEST | XPC_C_CONNECTING);
- xpc_IPI_send_openrequest(ch, &irq_flags);
+ xpc_arch_ops.send_chctl_openrequest(ch, &irq_flags);
xpc_process_connect(ch, &irq_flags);
return xpSuccess;
}
-/*
- * Clear some of the msg flags in the local message queue.
- */
-static inline void
-xpc_clear_local_msgqueue_flags(struct xpc_channel *ch)
-{
- struct xpc_msg *msg;
- s64 get;
-
- get = ch->w_remote_GP.get;
- do {
- msg = (struct xpc_msg *)((u64)ch->local_msgqueue +
- (get % ch->local_nentries) *
- ch->msg_size);
- msg->flags = 0;
- } while (++get < ch->remote_GP.get);
-}
-
-/*
- * Clear some of the msg flags in the remote message queue.
- */
-static inline void
-xpc_clear_remote_msgqueue_flags(struct xpc_channel *ch)
-{
- struct xpc_msg *msg;
- s64 put;
-
- put = ch->w_remote_GP.put;
- do {
- msg = (struct xpc_msg *)((u64)ch->remote_msgqueue +
- (put % ch->remote_nentries) *
- ch->msg_size);
- msg->flags = 0;
- } while (++put < ch->remote_GP.put);
-}
-
-static void
-xpc_process_msg_IPI(struct xpc_partition *part, int ch_number)
-{
- struct xpc_channel *ch = &part->channels[ch_number];
- int nmsgs_sent;
-
- ch->remote_GP = part->remote_GPs[ch_number];
-
- /* See what, if anything, has changed for each connected channel */
-
- xpc_msgqueue_ref(ch);
-
- if (ch->w_remote_GP.get == ch->remote_GP.get &&
- ch->w_remote_GP.put == ch->remote_GP.put) {
- /* nothing changed since GPs were last pulled */
- xpc_msgqueue_deref(ch);
- return;
- }
-
- if (!(ch->flags & XPC_C_CONNECTED)) {
- xpc_msgqueue_deref(ch);
- return;
- }
-
- /*
- * First check to see if messages recently sent by us have been
- * received by the other side. (The remote GET value will have
- * changed since we last looked at it.)
- */
-
- if (ch->w_remote_GP.get != ch->remote_GP.get) {
-
- /*
- * We need to notify any senders that want to be notified
- * that their sent messages have been received by their
- * intended recipients. We need to do this before updating
- * w_remote_GP.get so that we don't allocate the same message
- * queue entries prematurely (see xpc_allocate_msg()).
- */
- if (atomic_read(&ch->n_to_notify) > 0) {
- /*
- * Notify senders that messages sent have been
- * received and delivered by the other side.
- */
- xpc_notify_senders(ch, xpMsgDelivered,
- ch->remote_GP.get);
- }
-
- /*
- * Clear msg->flags in previously sent messages, so that
- * they're ready for xpc_allocate_msg().
- */
- xpc_clear_local_msgqueue_flags(ch);
-
- ch->w_remote_GP.get = ch->remote_GP.get;
-
- dev_dbg(xpc_chan, "w_remote_GP.get changed to %ld, partid=%d, "
- "channel=%d\n", ch->w_remote_GP.get, ch->partid,
- ch->number);
-
- /*
- * If anyone was waiting for message queue entries to become
- * available, wake them up.
- */
- if (atomic_read(&ch->n_on_msg_allocate_wq) > 0)
- wake_up(&ch->msg_allocate_wq);
- }
-
- /*
- * Now check for newly sent messages by the other side. (The remote
- * PUT value will have changed since we last looked at it.)
- */
-
- if (ch->w_remote_GP.put != ch->remote_GP.put) {
- /*
- * Clear msg->flags in previously received messages, so that
- * they're ready for xpc_get_deliverable_msg().
- */
- xpc_clear_remote_msgqueue_flags(ch);
-
- ch->w_remote_GP.put = ch->remote_GP.put;
-
- dev_dbg(xpc_chan, "w_remote_GP.put changed to %ld, partid=%d, "
- "channel=%d\n", ch->w_remote_GP.put, ch->partid,
- ch->number);
-
- nmsgs_sent = ch->w_remote_GP.put - ch->w_local_GP.get;
- if (nmsgs_sent > 0) {
- dev_dbg(xpc_chan, "msgs waiting to be copied and "
- "delivered=%d, partid=%d, channel=%d\n",
- nmsgs_sent, ch->partid, ch->number);
-
- if (ch->flags & XPC_C_CONNECTEDCALLOUT_MADE)
- xpc_activate_kthreads(ch, nmsgs_sent);
- }
- }
-
- xpc_msgqueue_deref(ch);
-}
-
void
-xpc_process_channel_activity(struct xpc_partition *part)
+xpc_process_sent_chctl_flags(struct xpc_partition *part)
{
unsigned long irq_flags;
- u64 IPI_amo, IPI_flags;
+ union xpc_channel_ctl_flags chctl;
struct xpc_channel *ch;
int ch_number;
u32 ch_flags;
- IPI_amo = xpc_get_IPI_flags(part);
+ chctl.all_flags = xpc_arch_ops.get_chctl_all_flags(part);
/*
* Initiate channel connections for registered channels.
ch = &part->channels[ch_number];
/*
- * Process any open or close related IPI flags, and then deal
+ * Process any open or close related chctl flags, and then deal
* with connecting or disconnecting the channel as required.
*/
- IPI_flags = XPC_GET_IPI_FLAGS(IPI_amo, ch_number);
-
- if (XPC_ANY_OPENCLOSE_IPI_FLAGS_SET(IPI_flags))
- xpc_process_openclose_IPI(part, ch_number, IPI_flags);
+ if (chctl.flags[ch_number] & XPC_OPENCLOSE_CHCTL_FLAGS) {
+ xpc_process_openclose_chctl_flags(part, ch_number,
+ chctl.flags[ch_number]);
+ }
ch_flags = ch->flags; /* need an atomic snapshot of flags */
continue;
}
- if (part->act_state == XPC_P_DEACTIVATING)
+ if (part->act_state == XPC_P_AS_DEACTIVATING)
continue;
if (!(ch_flags & XPC_C_CONNECTED)) {
if (!(ch_flags & XPC_C_OPENREQUEST)) {
DBUG_ON(ch_flags & XPC_C_SETUP);
(void)xpc_connect_channel(ch);
- } else {
- spin_lock_irqsave(&ch->lock, irq_flags);
- xpc_process_connect(ch, &irq_flags);
- spin_unlock_irqrestore(&ch->lock, irq_flags);
}
continue;
}
/*
- * Process any message related IPI flags, this may involve the
- * activation of kthreads to deliver any pending messages sent
- * from the other partition.
+ * Process any message related chctl flags, this may involve
+ * the activation of kthreads to deliver any pending messages
+ * sent from the other partition.
*/
- if (XPC_ANY_MSG_IPI_FLAGS_SET(IPI_flags))
- xpc_process_msg_IPI(part, ch_number);
+ if (chctl.flags[ch_number] & XPC_MSG_CHCTL_FLAGS)
+ xpc_arch_ops.process_msg_chctl_flags(part, ch_number);
}
}
XPC_C_ROPENREQUEST | XPC_C_ROPENREPLY |
XPC_C_CONNECTING | XPC_C_CONNECTED);
- xpc_IPI_send_closerequest(ch, irq_flags);
+ xpc_arch_ops.send_chctl_closerequest(ch, irq_flags);
if (channel_was_connected)
ch->flags |= XPC_C_WASCONNECTED;
DBUG_ON(payload == NULL);
if (xpc_part_ref(part)) {
- ret = xpc_send_msg(&part->channels[ch_number], flags, payload,
- payload_size, 0, NULL, NULL);
+ ret = xpc_arch_ops.send_payload(&part->channels[ch_number],
+ flags, payload, payload_size, 0, NULL, NULL);
xpc_part_deref(part);
}
DBUG_ON(func == NULL);
if (xpc_part_ref(part)) {
- ret = xpc_send_msg(&part->channels[ch_number], flags, payload,
- payload_size, XPC_N_CALL, func, key);
+ ret = xpc_arch_ops.send_payload(&part->channels[ch_number],
+ flags, payload, payload_size, XPC_N_CALL, func, key);
xpc_part_deref(part);
}
return ret;
}
/*
- * Deliver a message to its intended recipient.
+ * Deliver a message's payload to its intended recipient.
*/
void
-xpc_deliver_msg(struct xpc_channel *ch)
+xpc_deliver_payload(struct xpc_channel *ch)
{
- struct xpc_msg *msg;
+ void *payload;
- msg = xpc_get_deliverable_msg(ch);
- if (msg != NULL) {
+ payload = xpc_arch_ops.get_deliverable_payload(ch);
+ if (payload != NULL) {
/*
* This ref is taken to protect the payload itself from being
atomic_inc(&ch->kthreads_active);
if (ch->func != NULL) {
- dev_dbg(xpc_chan, "ch->func() called, msg=0x%p, "
- "msg_number=%ld, partid=%d, channel=%d\n",
- (void *)msg, msg->number, ch->partid,
+ dev_dbg(xpc_chan, "ch->func() called, payload=0x%p "
+ "partid=%d channel=%d\n", payload, ch->partid,
ch->number);
/* deliver the message to its intended recipient */
- ch->func(xpMsgReceived, ch->partid, ch->number,
- &msg->payload, ch->key);
+ ch->func(xpMsgReceived, ch->partid, ch->number, payload,
+ ch->key);
- dev_dbg(xpc_chan, "ch->func() returned, msg=0x%p, "
- "msg_number=%ld, partid=%d, channel=%d\n",
- (void *)msg, msg->number, ch->partid,
+ dev_dbg(xpc_chan, "ch->func() returned, payload=0x%p "
+ "partid=%d channel=%d\n", payload, ch->partid,
ch->number);
}
}
/*
- * Acknowledge receipt of a delivered message.
- *
- * If a message has XPC_M_INTERRUPT set, send an interrupt to the partition
- * that sent the message.
+ * Acknowledge receipt of a delivered message's payload.
*
* This function, although called by users, does not call xpc_part_ref() to
* ensure that the partition infrastructure is in place. It relies on the
- * fact that we called xpc_msgqueue_ref() in xpc_deliver_msg().
+ * fact that we called xpc_msgqueue_ref() in xpc_deliver_payload().
*
* Arguments:
*
{
struct xpc_partition *part = &xpc_partitions[partid];
struct xpc_channel *ch;
- struct xpc_msg *msg = XPC_MSG_ADDRESS(payload);
DBUG_ON(partid < 0 || partid >= xp_max_npartitions);
DBUG_ON(ch_number < 0 || ch_number >= part->nchannels);
ch = &part->channels[ch_number];
- xpc_received_msg(ch, msg);
+ xpc_arch_ops.received_payload(ch, payload);
- /* the call to xpc_msgqueue_ref() was done by xpc_deliver_msg() */
+ /* the call to xpc_msgqueue_ref() was done by xpc_deliver_payload() */
xpc_msgqueue_deref(ch);
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff