[S390] qdio: new qdio driver.

List of major changes:
- split qdio driver into several files
- seperation of thin interrupt code
- improved handling for multiple thin interrupt devices
- inbound and outbound processing now always runs in tasklet context
- significant less tasklet schedules per interrupt needed
- merged qebsm with non-qebsm handling
- cleanup qdio interface and added kerneldoc
- coding style

Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Utz Bacher <utz.bacher@de.ibm.com>
Reviewed-by: Ursula Braun <braunu@de.ibm.com>
Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

1 files changed, 54 insertions, 0 deletions

diff --git a/drivers/s390/cio/qdio_perf.h b/drivers/s390/cio/qdio_perf.h
new file mode 100644
index 000000000000..5c406a8b7387
--- /dev/null
+++ b/drivers/s390/cio/qdio_perf.h
@@ -0,0 +1,54 @@
+/*
+ *  drivers/s390/cio/qdio_perf.h
+ *
+ *  Copyright IBM Corp. 2008
+ *
+ *  Author: Jan Glauber (jang@linux.vnet.ibm.com)
+ */
+#ifndef QDIO_PERF_H
+#define QDIO_PERF_H
+
+#include <linux/types.h>
+#include <linux/device.h>
+#include <asm/atomic.h>
+
+struct qdio_perf_stats {
+        /* interrupt handler calls */
+        atomic_long_t qdio_int;
+        atomic_long_t pci_int;
+        atomic_long_t thin_int;
+
+        /* tasklet runs */
+        atomic_long_t tasklet_inbound;
+        atomic_long_t tasklet_outbound;
+        atomic_long_t tasklet_thinint;
+        atomic_long_t tasklet_thinint_loop;
+        atomic_long_t thinint_inbound;
+        atomic_long_t thinint_inbound_loop;
+        atomic_long_t thinint_inbound_loop2;
+
+        /* signal adapter calls */
+        atomic_long_t siga_out;
+        atomic_long_t siga_in;
+        atomic_long_t siga_sync;
+
+        /* misc */
+        atomic_long_t inbound_handler;
+        atomic_long_t outbound_handler;
+        atomic_long_t fast_requeue;
+
+        /* for debugging */
+        atomic_long_t debug_tl_out_timer;
+        atomic_long_t debug_stop_polling;
+};
+
+extern struct qdio_perf_stats perf_stats;
+extern int qdio_performance_stats;
+
+int qdio_setup_perf_stats(void);
+void qdio_remove_perf_stats(void);
+
+extern void qdio_perf_stat_inc(atomic_long_t *count);
+extern void qdio_perf_stat_dec(atomic_long_t *count);
+
+#endif