From: Vishakha Channapattan <vishakhavc@xxxxxxxxxx>
A new sysfs variable 'ctl_hmi_error' is being introduced to
give the error details if the MPI initialization fails
Tested: Using 'ctl_hmi_error' sysfs variable we check the error details
linux-2dq0:~# cat /sys/class/scsi_host/host*/ctl_hmi_error
0x00000000
0x00000000
0x00000000
Signed-off-by: Vishakha Channapattan <vishakhavc@xxxxxxxxxx>
Signed-off-by: Viswas G <Viswas.G@xxxxxxxxxxxxx>
Signed-off-by: Ruksar Devadi <Ruksar.devadi@xxxxxxxxxxxxx>
---
drivers/scsi/pm8001/pm8001_ctl.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/drivers/scsi/pm8001/pm8001_ctl.c b/drivers/scsi/pm8001/pm8001_ctl.c
index a93799bd3a32..b1f105253a12 100644
--- a/drivers/scsi/pm8001/pm8001_ctl.c
+++ b/drivers/scsi/pm8001/pm8001_ctl.c
@@ -915,6 +915,27 @@ static ssize_t ctl_mpi_state_show(struct device *cdev,
}
static DEVICE_ATTR_RO(ctl_mpi_state);
+/**
+ * ctl_hmi_error_show - controller MPI initialization fails
+ * @cdev: pointer to embedded class device
+ * @buf: the buffer returned
+ *
+ * A sysfs 'read-only' shost attribute.
+ */
+
+static ssize_t ctl_hmi_error_show(struct device *cdev,
+ struct device_attribute *attr, char *buf)
+{
+ struct Scsi_Host *shost = class_to_shost(cdev);
+ struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
+ struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
+ unsigned int mpidw0;
+
+ mpidw0 = pm8001_mr32(pm8001_ha->general_stat_tbl_addr, 0);
+ return sysfs_emit(buf, "0x%08x\n", (mpidw0 >> 16));
+}
+static DEVICE_ATTR_RO(ctl_hmi_error);
+
struct device_attribute *pm8001_host_attrs[] = {
&dev_attr_interface_rev,
&dev_attr_controller_fatal_error,
@@ -939,6 +960,7 @@ struct device_attribute *pm8001_host_attrs[] = {
&dev_attr_ila_version,
&dev_attr_inc_fw_ver,
&dev_attr_ctl_mpi_state,
+ &dev_attr_ctl_hmi_error,
NULL,
};
--
2.16.3
