[S390] qdio: convert global statistics to per-device stats

Revamp the qdio performance statistics and move them from procfs to
debugfs using the seq_file interface. Since the statistics are not
intended for the general user the removal of /proc/qdio_perf should
not surprise anyone.

The per device statistics are disabled by default, writing 1 to
/<debugfs mountpoint>/qdio/<device bus ID>/statistics enables the
statistics for the given device.

Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 2 insertions, 6 deletions

diff --git a/drivers/s390/cio/qdio_thinint.c b/drivers/s390/cio/qdio_thinint.c
index 981a77ea7ee2..091d904d3182 100644
--- a/drivers/s390/cio/qdio_thinint.c
+++ b/drivers/s390/cio/qdio_thinint.c
@@ -1,9 +1,7 @@
 /*
  * linux/drivers/s390/cio/thinint_qdio.c
  *
- * thin interrupt support for qdio
- *
- * Copyright 2000-2008 IBM Corp.
+ * Copyright 2000,2009 IBM Corp.
  * Author(s): Utz Bacher <utz.bacher@de.ibm.com>
  *            Cornelia Huck <cornelia.huck@de.ibm.com>
  *            Jan Glauber <jang@linux.vnet.ibm.com>
@@ -19,7 +17,6 @@
 #include "ioasm.h"
 #include "qdio.h"
 #include "qdio_debug.h"
-#include "qdio_perf.h"
 
 /*
  * Restriction: only 63 iqdio subchannels would have its own indicator,
@@ -132,8 +129,6 @@ static void tiqdio_thinint_handler(void *ind, void *drv_data)
 {
         struct qdio_q *q;
 
-        qdio_perf_stat_inc(&perf_stats.thin_int);
-
         /*
          * SVS only when needed: issue SVS to benefit from iqdio interrupt
          * avoidance (SVS clears adapter interrupt suppression overwrite)
@@ -154,6 +149,7 @@ static void tiqdio_thinint_handler(void *ind, void *drv_data)
         list_for_each_entry_rcu(q, &tiq_list, entry)
                 /* only process queues from changed sets */
                 if (*q->irq_ptr->dsci) {
+                        qperf_inc(q, adapter_int);
 
                         /* only clear it if the indicator is non-shared */
                         if (!shared_ind(q->irq_ptr))