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| author | Vishakha Channapattan <vishakhavc@google.com> | 2021-04-15 16:03:46 +0530 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2021-04-15 22:28:59 -0400 |
| commit | a4c55e16c50022825966864cf1f08b9efa3ebb86 (patch) | |
| tree | 8eadbf184d7807e88bd4345993e984c7ae9d38a8 /drivers | |
| parent | 4ddbea1b6f51a2ac07c4b80b3c3f50ea37367828 (diff) | |
| download | linux-a4c55e16c50022825966864cf1f08b9efa3ebb86.tar.bz2 | |
scsi: pm80xx: Add sysfs attribute to check controller hmi error
A new sysfs variable 'ctl_hmi_error' is being introduced to give the error
details if the MPI initialization fails
Using the 'ctl_hmi_error' sysfs variable we can check the error details:
linux-2dq0:~# cat /sys/class/scsi_host/host*/ctl_hmi_error
0x00000000
0x00000000
0x00000000
Link: https://lore.kernel.org/r/20210415103352.3580-3-Viswas.G@microchip.com
Signed-off-by: Vishakha Channapattan <vishakhavc@google.com>
Signed-off-by: Viswas G <Viswas.G@microchip.com>
Signed-off-by: Ruksar Devadi <Ruksar.devadi@microchip.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/scsi/pm8001/pm8001_ctl.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/scsi/pm8001/pm8001_ctl.c b/drivers/scsi/pm8001/pm8001_ctl.c index f3863076a81e..786bd2d252b6 100644 --- a/drivers/scsi/pm8001/pm8001_ctl.c +++ b/drivers/scsi/pm8001/pm8001_ctl.c @@ -911,6 +911,27 @@ 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, @@ -935,6 +956,7 @@ 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, }; |