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s390/cio: log fake IRB events

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Add traces when queueing and delivering fake IRBs. These are significant
events that might have an impact on device driver processing and are
therefore relevant for problem analysis.

Reviewed-by: Vineeth Vijayan <vneethv@linux.ibm.com>
Signed-off-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
This commit is contained in:
Peter Oberparleiter 2024-04-10 11:46:20 +02:00 committed by Alexander Gordeev
parent 2d8527f2f9
commit 6f76592ef6
2 changed files with 13 additions and 0 deletions
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5
drivers/s390/cio/device_fsm.c
View File

@ -504,6 +504,11 @@ callback:
ccw_device_done(cdev, DEV_STATE_ONLINE);
/* Deliver fake irb to device driver, if needed. */
if (cdev->private->flags.fake_irb) {
CIO_MSG_EVENT(2, "fakeirb: deliver device 0.%x.%04x intparm %lx type=%d\n",
cdev->private->dev_id.ssid,
cdev->private->dev_id.devno,
cdev->private->intparm,
cdev->private->flags.fake_irb);
create_fake_irb(&cdev->private->dma_area->irb,
cdev->private->flags.fake_irb);
cdev->private->flags.fake_irb = 0;

8
drivers/s390/cio/device_ops.c
View File

@ -208,6 +208,10 @@ int ccw_device_start_timeout_key(struct ccw_device *cdev, struct ccw1 *cpa,
if (!cdev->private->flags.fake_irb) {
cdev->private->flags.fake_irb = FAKE_CMD_IRB;
cdev->private->intparm = intparm;
CIO_MSG_EVENT(2, "fakeirb: queue device 0.%x.%04x intparm %lx type=%d\n",
cdev->private->dev_id.ssid,
cdev->private->dev_id.devno, intparm,
cdev->private->flags.fake_irb);
return 0;
} else
/* There's already a fake I/O around. */
@ -551,6 +555,10 @@ int ccw_device_tm_start_timeout_key(struct ccw_device *cdev, struct tcw *tcw,
if (!cdev->private->flags.fake_irb) {
cdev->private->flags.fake_irb = FAKE_TM_IRB;
cdev->private->intparm = intparm;
CIO_MSG_EVENT(2, "fakeirb: queue device 0.%x.%04x intparm %lx type=%d\n",
cdev->private->dev_id.ssid,
cdev->private->dev_id.devno, intparm,
cdev->private->flags.fake_irb);
return 0;
} else
/* There's already a fake I/O around. */