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s390/eadm_sch: add support for irq statistics 

Add support for EADM interrupt statistics in /proc/interrupts.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Sebastian Ott 2012-08-28 16:48:47 +02:00 committed by Martin Schwidefsky
parent eadb86ab80
commit 2e73c2cf78
3 changed files with 5 additions and 0 deletions
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1
arch/s390/include/asm/irq.h
View File

@ -30,6 +30,7 @@ enum interruption_class {
IOINT_CLW,
IOINT_CTC,
IOINT_APB,
IOINT_ADM,
IOINT_CSC,
NMI_NMI,
NR_IRQS,

1
arch/s390/kernel/irq.c
View File

@ -55,6 +55,7 @@ static const struct irq_class intrclass_names[] = {
{.name = "CLW", .desc = "[I/O] CLAW" },
{.name = "CTC", .desc = "[I/O] CTC" },
{.name = "APB", .desc = "[I/O] AP Bus" },
{.name = "ADM", .desc = "[I/O] EADM Subchannel" },
{.name = "CSC", .desc = "[I/O] CHSC Subchannel" },
{.name = "NMI", .desc = "[NMI] Machine Check" },
};

3
drivers/s390/cio/eadm_sch.c
View File

@ -5,6 +5,7 @@
* Author(s): Sebastian Ott <sebott@linux.vnet.ibm.com>
*/
#include <linux/kernel_stat.h>
#include <linux/workqueue.h>
#include <linux/spinlock.h>
#include <linux/device.h>
@ -138,6 +139,8 @@ static void eadm_subchannel_irq(struct subchannel *sch)
EADM_LOG(6, "irq");
EADM_LOG_HEX(6, irb, sizeof(*irb));
kstat_cpu(smp_processor_id()).irqs[IOINT_ADM]++;
if ((scsw->stctl & (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND))
&& scsw->eswf == 1 && irb->esw.eadm.erw.r)
error = -EIO;