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scsi: megaraid_sas: Expose fw_cmds_outstanding through sysfs 

Expose FW outstanding commands (fw_outstanding) through sysfs interface.
This helps in debugging certain performance issues in the field.

Signed-off-by: Sasikumar Chandrasekaran <sasikumar.pc@broadcom.com>
Signed-off-by: Shivasharan S <shivasharan.srikanteshwara@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Shivasharan S 2018-01-05 05:27:46 -08:00 committed by Martin K. Petersen
parent 4959e61b83
commit 88d155c61a
1 changed files with 13 additions and 0 deletions
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13
drivers/scsi/megaraid/megaraid_sas_base.c
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@ -3122,6 +3122,16 @@ megasas_ldio_outstanding_show(struct device *cdev, struct device_attribute *attr
return snprintf(buf, PAGE_SIZE, "%d\n", atomic_read(&instance->ldio_outstanding));
}
static ssize_t
megasas_fw_cmds_outstanding_show(struct device *cdev,
struct device_attribute *attr, char *buf)
{
struct Scsi_Host *shost = class_to_shost(cdev);
struct megasas_instance *instance = (struct megasas_instance *)shost->hostdata;
return snprintf(buf, PAGE_SIZE, "%d\n", atomic_read(&instance->fw_outstanding));
}
static DEVICE_ATTR(fw_crash_buffer, S_IRUGO | S_IWUSR,
megasas_fw_crash_buffer_show, megasas_fw_crash_buffer_store);
static DEVICE_ATTR(fw_crash_buffer_size, S_IRUGO,
@ -3132,6 +3142,8 @@ static DEVICE_ATTR(page_size, S_IRUGO,
megasas_page_size_show, NULL);
static DEVICE_ATTR(ldio_outstanding, S_IRUGO,
megasas_ldio_outstanding_show, NULL);
static DEVICE_ATTR(fw_cmds_outstanding, S_IRUGO,
megasas_fw_cmds_outstanding_show, NULL);
struct device_attribute *megaraid_host_attrs[] = {
&dev_attr_fw_crash_buffer_size,
@ -3139,6 +3151,7 @@ struct device_attribute *megaraid_host_attrs[] = {
&dev_attr_fw_crash_state,
&dev_attr_page_size,
&dev_attr_ldio_outstanding,
&dev_attr_fw_cmds_outstanding,
NULL,
};