From: Shivasharan S <shivasharan.srikanteshwara@broadcom.com>
Date: Fri, 5 Jan 2018 05:27:46 -0800
Subject: [PATCH] scsi: megaraid_sas: Expose fw_cmds_outstanding through sysfs
References: bsc#1077408
Git-commit: 88d155c61acd3fb852c0a20be2d840f0765cae7c
Patch-mainline: v4.16-rc1
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>
Signed-off-by: Hannes Reinecke <hare@suse.de>
---
drivers/scsi/megaraid/megaraid_sas_base.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c
index 6da2766694cb..40775408c222 100644
--- a/drivers/scsi/megaraid/megaraid_sas_base.c
+++ b/drivers/scsi/megaraid/megaraid_sas_base.c
@@ -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,
};
--
2.12.3