[PATCH 06/17] mpt2sas: Added sysfs counter for ioc reset

Kashyap, Desai
2010-06-17T08:42:29Z

Added a new sysfs shost attribute called ioc_reset_count. This will
keep count of host resets (both diagnostic and message unit).

Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
---
diff --git a/drivers/scsi/mpt2sas/mpt2sas_base.c b/drivers/scsi/mpt2sas/mpt2sas_base.c
index d978c8a..e298303 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_base.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_base.c
@@ -3402,6 +3402,7 @@ _base_make_ioc_ready(struct MPT2SAS_ADAPTER *ioc, int sleep_flag,
enum reset_type type)
{
u32 ioc_state;
+ int rc;

dinitprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s\n", ioc->name,
__func__));
@@ -3430,11 +3431,15 @@ _base_make_ioc_ready(struct MPT2SAS_ADAPTER *ioc, int sleep_flag,

if ((ioc_state & MPI2_IOC_STATE_MASK) == MPI2_IOC_STATE_OPERATIONAL)
if (!(_base_send_ioc_reset(ioc,
- MPI2_FUNCTION_IOC_MESSAGE_UNIT_RESET, 15, CAN_SLEEP)))
+ MPI2_FUNCTION_IOC_MESSAGE_UNIT_RESET, 15, CAN_SLEEP))) {
+ ioc->ioc_reset_count++;
return 0;
+ }

issue_diag_reset:
- return _base_diag_reset(ioc, CAN_SLEEP);
+ rc = _base_diag_reset(ioc, CAN_SLEEP);
+ ioc->ioc_reset_count++;
+ return rc;
}

/**
diff --git a/drivers/scsi/mpt2sas/mpt2sas_base.h b/drivers/scsi/mpt2sas/mpt2sas_base.h
index d950e7d..ad277f3 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_base.h
+++ b/drivers/scsi/mpt2sas/mpt2sas_base.h
@@ -615,6 +615,7 @@ struct MPT2SAS_ADAPTER {
u16 msix_vector_count;
u32 *msix_table;
u32 *msix_table_backup;
+ u32 ioc_reset_count;

/* internal commands, callback index */
u8 scsi_io_cb_idx;
diff --git a/drivers/scsi/mpt2sas/mpt2sas_ctl.c b/drivers/scsi/mpt2sas/mpt2sas_ctl.c
index d88e975..53857c0 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_ctl.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_ctl.c
@@ -2581,6 +2581,29 @@ _ctl_fwfault_debug_store(struct device *cdev,
static DEVICE_ATTR(fwfault_debug, S_IRUGO | S_IWUSR,
_ctl_fwfault_debug_show, _ctl_fwfault_debug_store);

+
+/**
+ * _ctl_ioc_reset_count_show - ioc reset count
+ * @cdev - pointer to embedded class device
+ * @buf - the buffer returned
+ *
+ * This is firmware queue depth limit
+ *
+ * A sysfs 'read-only' shost attribute.
+ */
+static ssize_t
+_ctl_ioc_reset_count_show(struct device *cdev, struct device_attribute *attr,
+ char *buf)
+{
+ struct Scsi_Host *shost = class_to_shost(cdev);
+ struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
+
+ return snprintf(buf, PAGE_SIZE, "%08d\n", ioc->ioc_reset_count);
+}
+static DEVICE_ATTR(ioc_reset_count, S_IRUGO,
+ _ctl_ioc_reset_count_show, NULL);
+
+
struct device_attribute *mpt2sas_host_attrs[] = {
&dev_attr_version_fw,
&dev_attr_version_bios,
@@ -2597,6 +2620,7 @@ struct device_attribute *mpt2sas_host_attrs[] = {
&dev_attr_fwfault_debug,
&dev_attr_fw_queue_depth,
&dev_attr_host_sas_address,
+ &dev_attr_ioc_reset_count,
NULL,
};