[S390] qdio: add eqbs/sqbs instruction counters

Add counters for the eqbs and sqbs instructions that indicate how often
we issued the instructions and how often the instructions returned with
less buffers than specified.

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

drivers/s390/cio/qdio_main.c

@@ -129,6 +129,7 @@ static int qdio_do_eqbs(struct qdio_q *q, unsigned char *state,
 	char dbf_text[15];
 
 	BUG_ON(!q->irq_ptr->sch_token);
+	qdio_perf_stat_inc(&perf_stats.debug_eqbs_all);
 
 	if (!q->is_input_q)
 		nr += q->irq_ptr->nr_input_qs;
@@ -139,8 +140,10 @@ again:
 	/* At least one buffer was processed, return and extract the remaining
 	 * buffers later.
 	 */
-	if ((ccq == 96) && (count != tmp_count))
+	if ((ccq == 96) && (count != tmp_count)) {
+		qdio_perf_stat_inc(&perf_stats.debug_eqbs_incomplete);
 		return (count - tmp_count);
+	}
 	if (rc == 1) {
 		QDIO_DBF_TEXT5(1, trace, "eqAGAIN");
 		goto again;
@@ -179,6 +182,7 @@ static int qdio_do_sqbs(struct qdio_q *q, unsigned char state, int start,
 	char dbf_text[15];
 
 	BUG_ON(!q->irq_ptr->sch_token);
+	qdio_perf_stat_inc(&perf_stats.debug_sqbs_all);
 
 	if (!q->is_input_q)
 		nr += q->irq_ptr->nr_input_qs;
@@ -187,6 +191,7 @@ again:
 	rc = qdio_check_ccq(q, ccq);
 	if (rc == 1) {
 		QDIO_DBF_TEXT5(1, trace, "sqAGAIN");
+		qdio_perf_stat_inc(&perf_stats.debug_sqbs_incomplete);
 		goto again;
 	}
 	if (rc < 0) {