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path: root/drivers/misc/sgi-xp/xpc_channel.c
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Diffstat (limited to 'drivers/misc/sgi-xp/xpc_channel.c')
-rw-r--r--drivers/misc/sgi-xp/xpc_channel.c138
1 files changed, 79 insertions, 59 deletions
diff --git a/drivers/misc/sgi-xp/xpc_channel.c b/drivers/misc/sgi-xp/xpc_channel.c
index 99a2534c38a..652593fc486 100644
--- a/drivers/misc/sgi-xp/xpc_channel.c
+++ b/drivers/misc/sgi-xp/xpc_channel.c
@@ -3,7 +3,7 @@
* 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.
*/
/*
@@ -39,34 +39,38 @@ xpc_process_connect(struct xpc_channel *ch, unsigned long *irq_flags)
if (!(ch->flags & XPC_C_SETUP)) {
spin_unlock_irqrestore(&ch->lock, *irq_flags);
- ret = xpc_setup_msg_structures(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;
- ch->flags |= XPC_C_SETUP;
-
- if (ch->flags & (XPC_C_CONNECTED | XPC_C_DISCONNECTING))
+ if (ch->flags & XPC_C_DISCONNECTING)
return;
}
if (!(ch->flags & XPC_C_OPENREPLY)) {
ch->flags |= XPC_C_OPENREPLY;
- xpc_send_chctl_openreply(ch, irq_flags);
+ xpc_arch_ops.send_chctl_openreply(ch, irq_flags);
}
if (!(ch->flags & XPC_C_ROPENREPLY))
return;
- ch->flags = (XPC_C_CONNECTED | XPC_C_SETUP); /* clear all else */
+ if (!(ch->flags & XPC_C_OPENCOMPLETE)) {
+ ch->flags |= (XPC_C_OPENCOMPLETE | XPC_C_CONNECTED);
+ xpc_arch_ops.send_chctl_opencomplete(ch, irq_flags);
+ }
+
+ 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);
+ ch->flags = (XPC_C_CONNECTED | XPC_C_SETUP); /* clear all else */
}
/*
@@ -96,7 +100,7 @@ xpc_process_disconnect(struct xpc_channel *ch, unsigned long *irq_flags)
if (part->act_state == XPC_P_AS_DEACTIVATING) {
/* can't proceed until the other side disengages from us */
- if (xpc_partition_engaged(ch->partid))
+ if (xpc_arch_ops.partition_engaged(ch->partid))
return;
} else {
@@ -108,7 +112,7 @@ xpc_process_disconnect(struct xpc_channel *ch, unsigned long *irq_flags)
if (!(ch->flags & XPC_C_CLOSEREPLY)) {
ch->flags |= XPC_C_CLOSEREPLY;
- xpc_send_chctl_closereply(ch, irq_flags);
+ xpc_arch_ops.send_chctl_closereply(ch, irq_flags);
}
if (!(ch->flags & XPC_C_RCLOSEREPLY))
@@ -118,7 +122,7 @@ xpc_process_disconnect(struct xpc_channel *ch, unsigned long *irq_flags)
/* wake those waiting for notify completion */
if (atomic_read(&ch->n_to_notify) > 0) {
/* we do callout while holding ch->lock, callout can't block */
- xpc_notify_senders_of_disconnect(ch);
+ xpc_arch_ops.notify_senders_of_disconnect(ch);
}
/* both sides are disconnected now */
@@ -132,7 +136,7 @@ xpc_process_disconnect(struct xpc_channel *ch, unsigned long *irq_flags)
DBUG_ON(atomic_read(&ch->n_to_notify) != 0);
/* it's now safe to free the channel's message queues */
- xpc_teardown_msg_structures(ch);
+ xpc_arch_ops.teardown_msg_structures(ch);
ch->func = NULL;
ch->key = NULL;
@@ -144,8 +148,9 @@ xpc_process_disconnect(struct xpc_channel *ch, unsigned long *irq_flags)
/*
* Mark the channel disconnected and clear all other flags, including
- * XPC_C_SETUP (because of call to xpc_teardown_msg_structures()) but
- * not including XPC_C_WDISCONNECT (if it was set).
+ * 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));
@@ -184,6 +189,7 @@ xpc_process_openclose_chctl_flags(struct xpc_partition *part, int 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);
@@ -196,8 +202,7 @@ again:
* has had a chance to see that the channel is disconnected.
*/
ch->delayed_chctl_flags |= chctl_flags;
- spin_unlock_irqrestore(&ch->lock, irq_flags);
- return;
+ goto out;
}
if (chctl_flags & XPC_CHCTL_CLOSEREQUEST) {
@@ -239,8 +244,7 @@ again:
XPC_CHCTL_CLOSEREQUEST;
spin_unlock(&part->chctl_lock);
}
- spin_unlock_irqrestore(&ch->lock, irq_flags);
- return;
+ goto out;
}
XPC_SET_REASON(ch, 0, 0);
@@ -250,7 +254,8 @@ again:
ch->flags |= (XPC_C_CONNECTING | XPC_C_ROPENREQUEST);
}
- chctl_flags &= ~(XPC_CHCTL_OPENREQUEST | XPC_CHCTL_OPENREPLY);
+ chctl_flags &= ~(XPC_CHCTL_OPENREQUEST | XPC_CHCTL_OPENREPLY |
+ XPC_CHCTL_OPENCOMPLETE);
/*
* The meaningful CLOSEREQUEST connection state fields are:
@@ -269,8 +274,7 @@ again:
XPC_DISCONNECT_CHANNEL(ch, reason, &irq_flags);
DBUG_ON(chctl_flags & XPC_CHCTL_CLOSEREPLY);
- spin_unlock_irqrestore(&ch->lock, irq_flags);
- return;
+ goto out;
}
xpc_process_disconnect(ch, &irq_flags);
@@ -283,8 +287,7 @@ again:
if (ch->flags & XPC_C_DISCONNECTED) {
DBUG_ON(part->act_state != XPC_P_AS_DEACTIVATING);
- spin_unlock_irqrestore(&ch->lock, irq_flags);
- return;
+ goto out;
}
DBUG_ON(!(ch->flags & XPC_C_CLOSEREQUEST));
@@ -299,8 +302,7 @@ again:
XPC_CHCTL_CLOSEREPLY;
spin_unlock(&part->chctl_lock);
}
- spin_unlock_irqrestore(&ch->lock, irq_flags);
- return;
+ goto out;
}
ch->flags |= XPC_C_RCLOSEREPLY;
@@ -320,14 +322,12 @@ again:
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_chctl_flags |= XPC_CHCTL_OPENREQUEST;
- spin_unlock_irqrestore(&ch->lock, irq_flags);
- return;
+ goto out;
}
DBUG_ON(!(ch->flags & (XPC_C_DISCONNECTED |
XPC_C_OPENREQUEST)));
@@ -341,8 +341,7 @@ again:
*/
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);
@@ -352,8 +351,7 @@ again:
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->entry_size = args->entry_size;
@@ -375,15 +373,13 @@ again:
args->local_msgqueue_pa, args->local_nentries,
args->remote_nentries, ch->partid, ch->number);
- if (ch->flags & (XPC_C_DISCONNECTING | XPC_C_DISCONNECTED)) {
- spin_unlock_irqrestore(&ch->lock, irq_flags);
- return;
- }
+ if (ch->flags & (XPC_C_DISCONNECTING | XPC_C_DISCONNECTED))
+ goto out;
+
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));
@@ -400,11 +396,11 @@ again:
DBUG_ON(args->local_nentries == 0);
DBUG_ON(args->remote_nentries == 0);
- ret = xpc_save_remote_msgqueue_pa(ch, args->local_msgqueue_pa);
+ ret = xpc_arch_ops.save_remote_msgqueue_pa(ch,
+ args->local_msgqueue_pa);
if (ret != xpSuccess) {
XPC_DISCONNECT_CHANNEL(ch, ret, &irq_flags);
- spin_unlock_irqrestore(&ch->lock, irq_flags);
- return;
+ goto out;
}
ch->flags |= XPC_C_ROPENREPLY;
@@ -430,7 +426,36 @@ again:
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);
}
/*
@@ -508,7 +533,7 @@ xpc_connect_channel(struct xpc_channel *ch)
/* initiate the connection */
ch->flags |= (XPC_C_OPENREQUEST | XPC_C_CONNECTING);
- xpc_send_chctl_openrequest(ch, &irq_flags);
+ xpc_arch_ops.send_chctl_openrequest(ch, &irq_flags);
xpc_process_connect(ch, &irq_flags);
@@ -526,7 +551,7 @@ xpc_process_sent_chctl_flags(struct xpc_partition *part)
int ch_number;
u32 ch_flags;
- chctl.all_flags = xpc_get_chctl_all_flags(part);
+ chctl.all_flags = xpc_arch_ops.get_chctl_all_flags(part);
/*
* Initiate channel connections for registered channels.
@@ -564,10 +589,6 @@ xpc_process_sent_chctl_flags(struct xpc_partition *part)
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;
}
@@ -579,7 +600,7 @@ xpc_process_sent_chctl_flags(struct xpc_partition *part)
*/
if (chctl.flags[ch_number] & XPC_MSG_CHCTL_FLAGS)
- xpc_process_msg_chctl_flags(part, ch_number);
+ xpc_arch_ops.process_msg_chctl_flags(part, ch_number);
}
}
@@ -755,7 +776,7 @@ xpc_disconnect_channel(const int line, struct xpc_channel *ch,
XPC_C_ROPENREQUEST | XPC_C_ROPENREPLY |
XPC_C_CONNECTING | XPC_C_CONNECTED);
- xpc_send_chctl_closerequest(ch, irq_flags);
+ xpc_arch_ops.send_chctl_closerequest(ch, irq_flags);
if (channel_was_connected)
ch->flags |= XPC_C_WASCONNECTED;
@@ -862,8 +883,8 @@ xpc_initiate_send(short partid, int ch_number, u32 flags, void *payload,
DBUG_ON(payload == NULL);
if (xpc_part_ref(part)) {
- ret = xpc_send_payload(&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);
}
@@ -914,9 +935,8 @@ xpc_initiate_send_notify(short partid, int ch_number, u32 flags, void *payload,
DBUG_ON(func == NULL);
if (xpc_part_ref(part)) {
- ret = xpc_send_payload(&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;
@@ -930,7 +950,7 @@ xpc_deliver_payload(struct xpc_channel *ch)
{
void *payload;
- payload = xpc_get_deliverable_payload(ch);
+ payload = xpc_arch_ops.get_deliverable_payload(ch);
if (payload != NULL) {
/*
@@ -984,7 +1004,7 @@ xpc_initiate_received(short partid, int ch_number, void *payload)
DBUG_ON(ch_number < 0 || ch_number >= part->nchannels);
ch = &part->channels[ch_number];
- xpc_received_payload(ch, payload);
+ xpc_arch_ops.received_payload(ch, payload);
/* the call to xpc_msgqueue_ref() was done by xpc_deliver_payload() */
xpc_msgqueue_deref(ch);