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s390/qdio: export SSQD via debugfs

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While we print out various SSQD fields at initialization time, having
raw & full access to the current SSQD can help with debugging.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Julian Wiedmann 2020-02-24 09:53:47 +01:00 committed by Vasily Gorbik
parent 014b020475
commit ad451abee4
1 changed files with 19 additions and 0 deletions
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19
drivers/s390/cio/qdio_debug.c
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@ -190,6 +190,23 @@ static int qstat_show(struct seq_file *m, void *v)
DEFINE_SHOW_ATTRIBUTE(qstat);
static int ssqd_show(struct seq_file *m, void *v)
{
struct ccw_device *cdev = m->private;
struct qdio_ssqd_desc ssqd;
int rc;
rc = qdio_get_ssqd_desc(cdev, &ssqd);
if (rc)
return rc;
seq_hex_dump(m, "", DUMP_PREFIX_NONE, 16, 4, &ssqd, sizeof(ssqd),
false);
return 0;
}
DEFINE_SHOW_ATTRIBUTE(ssqd);
static char *qperf_names[] = {
"Assumed adapter interrupts",
"QDIO interrupts",
@ -303,6 +320,8 @@ void qdio_setup_debug_entries(struct qdio_irq *irq_ptr, struct ccw_device *cdev)
debugfs_root);
debugfs_create_file("statistics", S_IFREG | S_IRUGO | S_IWUSR,
irq_ptr->debugfs_dev, irq_ptr, &debugfs_perf_fops);
debugfs_create_file("ssqd", 0444, irq_ptr->debugfs_dev, cdev,
&ssqd_fops);
for_each_input_queue(irq_ptr, q, i)
setup_debugfs_entry(irq_ptr->debugfs_dev, q);