s390/qdio: export SSQD via debugfs

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>

diff --git a/drivers/s390/cio/qdio_debug.c b/drivers/s390/cio/qdio_debug.c
index bf8d825..8544fad 100644 (file)
--- a/drivers/s390/cio/qdio_debug.c
+++ b/drivers/s390/cio/qdio_debug.c
@@ -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);