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authorRuss Anderson <rja@sgi.com>2007-10-31 11:10:38 -0500
committerTony Luck <tony.luck@intel.com>2007-11-06 15:40:31 -0800
commit1f3b6045f783ee394076ad6dba2d72ecaaecd243 (patch)
treec20820794846f45db619991d0ddc26832ccf75e8 /arch/ia64
parentadb34022eb7a11126fecef6b5abb4741a17360c6 (diff)
[IA64] Disable/re-enable CPE interrupts on Altix
When the CPE handler encounters too many CPEs (such as a solid single bit memory error), it sets up a polling timer and disables the CPE interrupt (to avoid excessive overhead logging the stream of single bit errors). disable_irq_nosync() calls chip->disable() to provide a chipset specifiec interface for disabling the interrupt. This patch adds the Altix specific support to disable and re-enable the CPE interrupt. Signed-off-by: Russ Anderson (rja@sgi.com) Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch/ia64')
-rw-r--r--arch/ia64/kernel/mca.c2
-rw-r--r--arch/ia64/sn/kernel/irq.c8
2 files changed, 8 insertions, 2 deletions
diff --git a/arch/ia64/kernel/mca.c b/arch/ia64/kernel/mca.c
index cc87025e8f5..10b48cd15a8 100644
--- a/arch/ia64/kernel/mca.c
+++ b/arch/ia64/kernel/mca.c
@@ -571,7 +571,7 @@ out:
* Outputs
* None
*/
-static void __init
+void
ia64_mca_register_cpev (int cpev)
{
/* Register the CPE interrupt vector with SAL */
diff --git a/arch/ia64/sn/kernel/irq.c b/arch/ia64/sn/kernel/irq.c
index 0f9b12683bf..53351c3cd7b 100644
--- a/arch/ia64/sn/kernel/irq.c
+++ b/arch/ia64/sn/kernel/irq.c
@@ -5,7 +5,7 @@
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * Copyright (c) 2000-2006 Silicon Graphics, Inc. All Rights Reserved.
+ * Copyright (c) 2000-2007 Silicon Graphics, Inc. All Rights Reserved.
*/
#include <linux/irq.h>
@@ -85,12 +85,18 @@ static void sn_shutdown_irq(unsigned int irq)
{
}
+extern void ia64_mca_register_cpev(int);
+
static void sn_disable_irq(unsigned int irq)
{
+ if (irq == local_vector_to_irq(IA64_CPE_VECTOR))
+ ia64_mca_register_cpev(0);
}
static void sn_enable_irq(unsigned int irq)
{
+ if (irq == local_vector_to_irq(IA64_CPE_VECTOR))
+ ia64_mca_register_cpev(irq);
}
static void sn_ack_irq(unsigned int irq)