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| author | Robin Holt <holt@sgi.com> | 2009-04-13 14:40:19 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-04-13 15:04:33 -0700 |
| commit | efdd06ed181a88a11e612238c1ac04668e665395 (patch) | |
| tree | 6d66f74c82edf9986eeab5b3edef4697d5b6bb5c /drivers/misc/sgi-xp/xpc_uv.c | |
| parent | a374c57b0764432a80303abee3d1afd1939b5a0a (diff) | |
| download | op-kernel-dev-efdd06ed181a88a11e612238c1ac04668e665395.zip op-kernel-dev-efdd06ed181a88a11e612238c1ac04668e665395.tar.gz | |
sgi-xpc: implement opencomplete messaging
sgi-xpc has a window of failure where an open message can be sent and a
subsequent data message can get lost. We have added a new message
(opencomplete) which closes that window.
Signed-off-by: Robin Holt <holt@sgi.com>
Signed-off-by: Dean Nelson <dcn@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/misc/sgi-xp/xpc_uv.c')
| -rw-r--r-- | drivers/misc/sgi-xp/xpc_uv.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/misc/sgi-xp/xpc_uv.c b/drivers/misc/sgi-xp/xpc_uv.c index 97f7cb2..1e475b4 100644 --- a/drivers/misc/sgi-xp/xpc_uv.c +++ b/drivers/misc/sgi-xp/xpc_uv.c @@ -534,6 +534,17 @@ xpc_handle_activate_mq_msg_uv(struct xpc_partition *part, xpc_wakeup_channel_mgr(part); break; } + case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENCOMPLETE_UV: { + struct xpc_activate_mq_msg_chctl_opencomplete_uv *msg; + + msg = container_of(msg_hdr, struct + xpc_activate_mq_msg_chctl_opencomplete_uv, hdr); + spin_lock_irqsave(&part->chctl_lock, irq_flags); + part->chctl.flags[msg->ch_number] |= XPC_CHCTL_OPENCOMPLETE; + spin_unlock_irqrestore(&part->chctl_lock, irq_flags); + + xpc_wakeup_channel_mgr(part); + } case XPC_ACTIVATE_MQ_MSG_MARK_ENGAGED_UV: spin_lock_irqsave(&part_uv->flags_lock, irq_flags); part_uv->flags |= XPC_P_ENGAGED_UV; @@ -1202,6 +1213,16 @@ xpc_send_chctl_openreply_uv(struct xpc_channel *ch, unsigned long *irq_flags) } static void +xpc_send_chctl_opencomplete_uv(struct xpc_channel *ch, unsigned long *irq_flags) +{ + struct xpc_activate_mq_msg_chctl_opencomplete_uv msg; + + msg.ch_number = ch->number; + xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg), + XPC_ACTIVATE_MQ_MSG_CHCTL_OPENCOMPLETE_UV); +} + +static void xpc_send_chctl_local_msgrequest_uv(struct xpc_partition *part, int ch_number) { unsigned long irq_flags; @@ -1665,6 +1686,7 @@ xpc_init_uv(void) xpc_send_chctl_closereply = xpc_send_chctl_closereply_uv; xpc_send_chctl_openrequest = xpc_send_chctl_openrequest_uv; xpc_send_chctl_openreply = xpc_send_chctl_openreply_uv; + xpc_send_chctl_opencomplete = xpc_send_chctl_opencomplete_uv; xpc_save_remote_msgqueue_pa = xpc_save_remote_msgqueue_pa_uv; |
