[S390] qdio: improve s390 debug feature usage

Improve s390 debug feature usage:
- log busy bit in dbf
- increase size of dbf views
- consistent logging of qdio api calls to setup view
- print subchannel number so one can associate the interface
  with the dbf data
- only log events to one view
Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

drivers/s390/cio/qdio_debug.h

@@ -61,18 +61,18 @@
 
 /* s390dbf views */
 #define QDIO_DBF_SETUP_LEN		8
-#define QDIO_DBF_SETUP_PAGES		4
+#define QDIO_DBF_SETUP_PAGES		8
 #define QDIO_DBF_SETUP_NR_AREAS		1
 
 #define QDIO_DBF_TRACE_LEN		8
 #define QDIO_DBF_TRACE_NR_AREAS		2
 
 #ifdef CONFIG_QDIO_DEBUG
-#define QDIO_DBF_TRACE_PAGES		16
+#define QDIO_DBF_TRACE_PAGES		32
 #define QDIO_DBF_SETUP_LEVEL		6
 #define QDIO_DBF_TRACE_LEVEL		4
 #else /* !CONFIG_QDIO_DEBUG */
-#define QDIO_DBF_TRACE_PAGES		4
+#define QDIO_DBF_TRACE_PAGES		8
 #define QDIO_DBF_SETUP_LEVEL		2
 #define QDIO_DBF_TRACE_LEVEL		2
 #endif /* CONFIG_QDIO_DEBUG */

drivers/s390/cio/qdio_main.c

@@ -330,6 +330,7 @@ static int qdio_siga_output(struct qdio_q *q)
 	int cc;
 	u32 busy_bit;
 	u64 start_time = 0;
+	char dbf_text[15];
 
 	QDIO_DBF_TEXT5(0, trace, "sigaout");
 	QDIO_DBF_HEX5(0, trace, &q, sizeof(void *));
@@ -338,6 +339,9 @@ static int qdio_siga_output(struct qdio_q *q)
 again:
 	cc = qdio_do_siga_output(q, &busy_bit);
 	if (queue_type(q) == QDIO_IQDIO_QFMT && cc == 2 && busy_bit) {
+		sprintf(dbf_text, "bb%4x%2x", q->irq_ptr->schid.sch_no, q->nr);
+		QDIO_DBF_TEXT3(0, trace, dbf_text);
+
 		if (!start_time)
 			start_time = get_usecs();
 		else if ((get_usecs() - start_time) < QDIO_BUSY_BIT_PATIENCE)
@@ -748,16 +752,18 @@ static void qdio_kick_outbound_q(struct qdio_q *q)
 	rc = qdio_siga_output(q);
 	switch (rc) {
 	case 0:
-		/* went smooth this time, reset timestamp */
-		q->u.out.timestamp = 0;
-
 		/* TODO: improve error handling for CC=0 case */
 #ifdef CONFIG_QDIO_DEBUG
+		if (q->u.out.timestamp) {
 			QDIO_DBF_TEXT3(0, trace, "cc2reslv");
-		sprintf(dbf_text, "%4x%2x%2x", q->irq_ptr->schid.sch_no, q->nr,
+			sprintf(dbf_text, "%4x%2x%2x", q->irq_ptr->schid.sch_no,
+				q->nr,
 				atomic_read(&q->u.out.busy_siga_counter));
 			QDIO_DBF_TEXT3(0, trace, dbf_text);
+		}
 #endif /* CONFIG_QDIO_DEBUG */
+		/* went smooth this time, reset timestamp */
+		q->u.out.timestamp = 0;
 		break;
 	/* cc=2 and busy bit */
 	case (2 | QDIO_ERROR_SIGA_BUSY):
@@ -1066,14 +1072,12 @@ void qdio_int_handler(struct ccw_device *cdev, unsigned long intparm,
 	if (IS_ERR(irb)) {
 		switch (PTR_ERR(irb)) {
 		case -EIO:
-			sprintf(dbf_text, "ierr%4x",
-				cdev->private->schid.sch_no);
+			sprintf(dbf_text, "ierr%4x", irq_ptr->schid.sch_no);
 			QDIO_DBF_TEXT2(1, setup, dbf_text);
 			qdio_int_error(cdev);
 			return;
 		case -ETIMEDOUT:
-			sprintf(dbf_text, "qtoh%4x",
-				cdev->private->schid.sch_no);
+			sprintf(dbf_text, "qtoh%4x", irq_ptr->schid.sch_no);
 			QDIO_DBF_TEXT2(1, setup, dbf_text);
 			qdio_int_error(cdev);
 			return;
@@ -1124,8 +1128,10 @@ void qdio_int_handler(struct ccw_device *cdev, unsigned long intparm,
 struct qdio_ssqd_desc *qdio_get_ssqd_desc(struct ccw_device *cdev)
 {
 	struct qdio_irq *irq_ptr;
+	char dbf_text[15];
 
-	QDIO_DBF_TEXT0(0, setup, "getssqd");
+	sprintf(dbf_text, "qssq%4x", cdev->private->schid.sch_no);
+	QDIO_DBF_TEXT0(0, setup, dbf_text);
 
 	irq_ptr = cdev->private->qdio_data;
 	if (!irq_ptr)
@@ -1149,14 +1155,13 @@ int qdio_cleanup(struct ccw_device *cdev, int how)
 	char dbf_text[15];
 	int rc;
 
+	sprintf(dbf_text, "qcln%4x", cdev->private->schid.sch_no);
+	QDIO_DBF_TEXT0(0, setup, dbf_text);
+
 	irq_ptr = cdev->private->qdio_data;
 	if (!irq_ptr)
 		return -ENODEV;
 
-	sprintf(dbf_text, "qcln%4x", irq_ptr->schid.sch_no);
-	QDIO_DBF_TEXT1(0, trace, dbf_text);
-	QDIO_DBF_TEXT0(0, setup, dbf_text);
-
 	rc = qdio_shutdown(cdev, how);
 	if (rc == 0)
 		rc = qdio_free(cdev);
@@ -1191,6 +1196,9 @@ int qdio_shutdown(struct ccw_device *cdev, int how)
 	unsigned long flags;
 	char dbf_text[15];
 
+	sprintf(dbf_text, "qshu%4x", cdev->private->schid.sch_no);
+	QDIO_DBF_TEXT0(0, setup, dbf_text);
+
 	irq_ptr = cdev->private->qdio_data;
 	if (!irq_ptr)
 		return -ENODEV;
@@ -1205,10 +1213,6 @@ int qdio_shutdown(struct ccw_device *cdev, int how)
 		return 0;
 	}
 
-	sprintf(dbf_text, "qsqs%4x", irq_ptr->schid.sch_no);
-	QDIO_DBF_TEXT1(0, trace, dbf_text);
-	QDIO_DBF_TEXT0(0, setup, dbf_text);
-
 	tiqdio_remove_input_queues(irq_ptr);
 	qdio_shutdown_queues(cdev);
 	qdio_shutdown_debug_entries(irq_ptr, cdev);
@@ -1263,16 +1267,14 @@ int qdio_free(struct ccw_device *cdev)
 	struct qdio_irq *irq_ptr;
 	char dbf_text[15];
 
+	sprintf(dbf_text, "qfre%4x", cdev->private->schid.sch_no);
+	QDIO_DBF_TEXT0(0, setup, dbf_text);
+
 	irq_ptr = cdev->private->qdio_data;
 	if (!irq_ptr)
 		return -ENODEV;
 
 	mutex_lock(&irq_ptr->setup_mutex);
-
-	sprintf(dbf_text, "qfqs%4x", irq_ptr->schid.sch_no);
-	QDIO_DBF_TEXT1(0, trace, dbf_text);
-	QDIO_DBF_TEXT0(0, setup, dbf_text);
-
 	cdev->private->qdio_data = NULL;
 	mutex_unlock(&irq_ptr->setup_mutex);
 
@@ -1295,7 +1297,6 @@ int qdio_initialize(struct qdio_initialize *init_data)
 
 	sprintf(dbf_text, "qini%4x", init_data->cdev->private->schid.sch_no);
 	QDIO_DBF_TEXT0(0, setup, dbf_text);
-	QDIO_DBF_TEXT0(0, trace, dbf_text);
 
 	rc = qdio_allocate(init_data);
 	if (rc)
@@ -1319,7 +1320,6 @@ int qdio_allocate(struct qdio_initialize *init_data)
 
 	sprintf(dbf_text, "qalc%4x", init_data->cdev->private->schid.sch_no);
 	QDIO_DBF_TEXT0(0, setup, dbf_text);
-	QDIO_DBF_TEXT0(0, trace, dbf_text);
 
 	if ((init_data->no_input_qs && !init_data->input_handler) ||
 	    (init_data->no_output_qs && !init_data->output_handler))
@@ -1389,6 +1389,9 @@ int qdio_establish(struct qdio_initialize *init_data)
 	unsigned long saveflags;
 	int rc;
 
+	sprintf(dbf_text, "qest%4x", cdev->private->schid.sch_no);
+	QDIO_DBF_TEXT0(0, setup, dbf_text);
+
 	irq_ptr = cdev->private->qdio_data;
 	if (!irq_ptr)
 		return -ENODEV;
@@ -1399,10 +1402,6 @@ int qdio_establish(struct qdio_initialize *init_data)
 	if (!try_module_get(THIS_MODULE))
 		return -EINVAL;
 
-	sprintf(dbf_text, "qest%4x", cdev->private->schid.sch_no);
-	QDIO_DBF_TEXT0(0, setup, dbf_text);
-	QDIO_DBF_TEXT0(0, trace, dbf_text);
-
 	mutex_lock(&irq_ptr->setup_mutex);
 	qdio_setup_irq(init_data);
 
@@ -1472,6 +1471,9 @@ int qdio_activate(struct ccw_device *cdev)
 	unsigned long saveflags;
 	char dbf_text[20];
 
+	sprintf(dbf_text, "qact%4x", cdev->private->schid.sch_no);
+	QDIO_DBF_TEXT0(0, setup, dbf_text);
+
 	irq_ptr = cdev->private->qdio_data;
 	if (!irq_ptr)
 		return -ENODEV;
@@ -1485,10 +1487,6 @@ int qdio_activate(struct ccw_device *cdev)
 		goto out;
 	}
 
-	sprintf(dbf_text, "qact%4x", irq_ptr->schid.sch_no);
-	QDIO_DBF_TEXT2(0, setup, dbf_text);
-	QDIO_DBF_TEXT2(0, trace, dbf_text);
-
 	irq_ptr->ccw.cmd_code = irq_ptr->aqueue.cmd;
 	irq_ptr->ccw.flags = CCW_FLAG_SLI;
 	irq_ptr->ccw.count = irq_ptr->aqueue.count;
@@ -1663,7 +1661,7 @@ int do_QDIO(struct ccw_device *cdev, unsigned int callflags,
 #ifdef CONFIG_QDIO_DEBUG
 	char dbf_text[20];
 
-	sprintf(dbf_text, "doQD%04x", cdev->private->schid.sch_no);
+	sprintf(dbf_text, "doQD%4x", cdev->private->schid.sch_no);
 	QDIO_DBF_TEXT3(0, trace, dbf_text);
 #endif /* CONFIG_QDIO_DEBUG */
 

drivers/s390/cio/qdio_setup.c

@@ -165,7 +165,7 @@ static void setup_queues(struct qdio_irq *irq_ptr,
 	void **output_sbal_array = qdio_init->output_sbal_addr_array;
 	int i;
 
-	sprintf(dbf_text, "qfqs%4x", qdio_init->cdev->private->schid.sch_no);
+	sprintf(dbf_text, "qset%4x", qdio_init->cdev->private->schid.sch_no);
 	QDIO_DBF_TEXT0(0, setup, dbf_text);
 
 	for_each_input_queue(irq_ptr, q, i) {
@@ -285,7 +285,7 @@ void qdio_setup_ssqd_info(struct qdio_irq *irq_ptr)
 	rc = __get_ssqd_info(irq_ptr);
 	if (rc) {
 		QDIO_DBF_TEXT2(0, setup, "ssqdasig");
-		sprintf(dbf_text, "schno%x", irq_ptr->schid.sch_no);
+		sprintf(dbf_text, "schn%4x", irq_ptr->schid.sch_no);
 		QDIO_DBF_TEXT2(0, setup, dbf_text);
 		sprintf(dbf_text, "rc:%d", rc);
 		QDIO_DBF_TEXT2(0, setup, dbf_text);
@@ -447,7 +447,7 @@ void qdio_print_subchannel_info(struct qdio_irq *irq_ptr,
 {
 	char s[80];
 
-	sprintf(s, "%s ", cdev->dev.bus_id);
+	sprintf(s, "%s sc:%x ", cdev->dev.bus_id, irq_ptr->schid.sch_no);
 
 	switch (irq_ptr->qib.qfmt) {
 	case QDIO_QETH_QFMT: