From: Arun Easi <aeasi@xxxxxxxxxxx>
Add a mechanism to trigger MPI pause for debugging purpose.
Signed-off-by: Arun Easi <aeasi@xxxxxxxxxxx>
Signed-off-by: Nilesh Javali <njavali@xxxxxxxxxxx>
Reviewed-by: Himanshu Madhani <himanshu.madhani@xxxxxxxxxx>
---
drivers/scsi/qla2xxx/qla_attr.c | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)
diff --git a/drivers/scsi/qla2xxx/qla_attr.c b/drivers/scsi/qla2xxx/qla_attr.c
index 22191e9a04a0..4a0a5b4e688d 100644
--- a/drivers/scsi/qla2xxx/qla_attr.c
+++ b/drivers/scsi/qla2xxx/qla_attr.c
@@ -1887,6 +1887,30 @@ qla2x00_port_speed_show(struct device *dev, struct device_attribute *attr,
return scnprintf(buf, PAGE_SIZE, "%s\n", spd[ha->link_data_rate]);
}
+static ssize_t
+qla2x00_mpi_pause_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ scsi_qla_host_t *vha = shost_priv(class_to_shost(dev));
+ int rval = 0;
+
+ if (sscanf(buf, "%d", &rval) != 1)
+ return -EINVAL;
+
+ ql_log(ql_log_warn, vha, 0x7089, "Pausing MPI...\n");
+
+ rval = qla83xx_wr_reg(vha, 0x002012d4, 0x30000001);
+
+ if (rval != QLA_SUCCESS) {
+ ql_log(ql_log_warn, vha, 0x708a, "Unable to pause MPI.\n");
+ count = 0;
+ }
+
+ return count;
+}
+
+static DEVICE_ATTR(mpi_pause, S_IWUSR, NULL, qla2x00_mpi_pause_store);
+
/* ----- */
static ssize_t
@@ -2482,6 +2506,7 @@ struct device_attribute *qla2x00_host_attrs[] = {
&dev_attr_fw_attr,
&dev_attr_dport_diagnostics,
&dev_attr_edif_doorbell,
+ &dev_attr_mpi_pause,
NULL, /* reserve for qlini_mode */
NULL, /* reserve for ql2xiniexchg */
NULL, /* reserve for ql2xexchoffld */
--
2.19.0.rc0
