Merge SCSI misc branch into isci-for-3.6 tag

3 files changed, 44 insertions, 15 deletions

diff --git a/drivers/scsi/megaraid/megaraid_sas.h b/drivers/scsi/megaraid/megaraid_sas.h
index e8f89264768..fcb005fa4bd 100644
--- a/drivers/scsi/megaraid/megaraid_sas.h
+++ b/drivers/scsi/megaraid/megaraid_sas.h
@@ -33,9 +33,9 @@
 /*
  * MegaRAID SAS Driver meta data
  */
-#define MEGASAS_VERSION				"00.00.06.15-rc1"
-#define MEGASAS_RELDATE				"Mar. 19, 2012"
-#define MEGASAS_EXT_VERSION			"Mon. Mar. 19 17:00:00 PDT 2012"
+#define MEGASAS_VERSION				"00.00.06.18-rc1"
+#define MEGASAS_RELDATE				"Jun. 17, 2012"
+#define MEGASAS_EXT_VERSION			"Tue. Jun. 17 17:00:00 PDT 2012"
 
 /*
  * Device IDs
@@ -747,6 +747,7 @@ struct megasas_ctrl_info {
 #define	MEGASAS_RESET_NOTICE_INTERVAL		5
 #define MEGASAS_IOCTL_CMD			0
 #define MEGASAS_DEFAULT_CMD_TIMEOUT		90
+#define MEGASAS_THROTTLE_QUEUE_DEPTH		16
 
 /*
  * FW reports the maximum of number of commands that it can accept (maximum
@@ -1364,6 +1365,7 @@ struct megasas_instance {
 	unsigned long bar;
 	long reset_flags;
 	struct mutex reset_mutex;
+	int throttlequeuedepth;
 };
 
 enum {
diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c
index ed38454228c..0393ec478cd 100644
--- a/drivers/scsi/megaraid/megaraid_sas_base.c
+++ b/drivers/scsi/megaraid/megaraid_sas_base.c
@@ -18,7 +18,7 @@
  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  *
  *  FILE: megaraid_sas_base.c
- *  Version : v00.00.06.15-rc1
+ *  Version : v00.00.06.18-rc1
  *
  *  Authors: LSI Corporation
  *           Sreenivas Bagalkote
@@ -71,6 +71,16 @@ static int msix_disable;
 module_param(msix_disable, int, S_IRUGO);
 MODULE_PARM_DESC(msix_disable, "Disable MSI-X interrupt handling. Default: 0");
 
+static int throttlequeuedepth = MEGASAS_THROTTLE_QUEUE_DEPTH;
+module_param(throttlequeuedepth, int, S_IRUGO);
+MODULE_PARM_DESC(throttlequeuedepth,
+	"Adapter queue depth when throttled due to I/O timeout. Default: 16");
+
+int resetwaittime = MEGASAS_RESET_WAIT_TIME;
+module_param(resetwaittime, int, S_IRUGO);
+MODULE_PARM_DESC(resetwaittime, "Wait time in seconds after I/O timeout "
+		 "before resetting adapter. Default: 180");
+
 MODULE_LICENSE("GPL");
 MODULE_VERSION(MEGASAS_VERSION);
 MODULE_AUTHOR("megaraidlinux@lsi.com");
@@ -1595,8 +1605,9 @@ megasas_check_and_restore_queue_depth(struct megasas_instance *instance)
 {
 	unsigned long flags;
 	if (instance->flag & MEGASAS_FW_BUSY
-		&& time_after(jiffies, instance->last_time + 5 * HZ)
-		&& atomic_read(&instance->fw_outstanding) < 17) {
+	    && time_after(jiffies, instance->last_time + 5 * HZ)
+	    && atomic_read(&instance->fw_outstanding) <
+	    instance->throttlequeuedepth + 1) {
 
 		spin_lock_irqsave(instance->host->host_lock, flags);
 		instance->flag &= ~MEGASAS_FW_BUSY;
@@ -1772,7 +1783,7 @@ static int megasas_wait_for_outstanding(struct megasas_instance *instance)
 		return SUCCESS;
 	}
 
-	for (i = 0; i < wait_time; i++) {
+	for (i = 0; i < resetwaittime; i++) {
 
 		int outstanding = atomic_read(&instance->fw_outstanding);
 
@@ -1914,7 +1925,7 @@ blk_eh_timer_return megasas_reset_timer(struct scsi_cmnd *scmd)
 		/* FW is busy, throttle IO */
 		spin_lock_irqsave(instance->host->host_lock, flags);
 
-		instance->host->can_queue = 16;
+		instance->host->can_queue = instance->throttlequeuedepth;
 		instance->last_time = jiffies;
 		instance->flag |= MEGASAS_FW_BUSY;
 
@@ -3577,6 +3588,24 @@ static int megasas_init_fw(struct megasas_instance *instance)
 
 	kfree(ctrl_info);
 
+	/* Check for valid throttlequeuedepth module parameter */
+	if (instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0073SKINNY ||
+	    instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0071SKINNY) {
+		if (throttlequeuedepth > (instance->max_fw_cmds -
+					  MEGASAS_SKINNY_INT_CMDS))
+			instance->throttlequeuedepth =
+				MEGASAS_THROTTLE_QUEUE_DEPTH;
+		else
+			instance->throttlequeuedepth = throttlequeuedepth;
+	} else {
+		if (throttlequeuedepth > (instance->max_fw_cmds -
+					  MEGASAS_INT_CMDS))
+			instance->throttlequeuedepth =
+				MEGASAS_THROTTLE_QUEUE_DEPTH;
+		else
+			instance->throttlequeuedepth = throttlequeuedepth;
+	}
+
         /*
 	* Setup tasklet for cmd completion
 	*/
diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c
index a610cf1d484..ddf094e7d0a 100644
--- a/drivers/scsi/megaraid/megaraid_sas_fusion.c
+++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c
@@ -94,6 +94,7 @@ int megasas_transition_to_ready(struct megasas_instance *instance, int ocr);
 void megaraid_sas_kill_hba(struct megasas_instance *instance);
 
 extern u32 megasas_dbg_lvl;
+extern int resetwaittime;
 
 /**
  * megasas_enable_intr_fusion -	Enables interrupts
@@ -461,8 +462,8 @@ megasas_alloc_cmds_fusion(struct megasas_instance *instance)
 	 * Allocate the dynamic array first and then allocate individual
 	 * commands.
 	 */
-	fusion->cmd_list = kmalloc(sizeof(struct megasas_cmd_fusion *)
-				   *max_cmd, GFP_KERNEL);
+	fusion->cmd_list = kzalloc(sizeof(struct megasas_cmd_fusion *)
+				   * max_cmd, GFP_KERNEL);
 
 	if (!fusion->cmd_list) {
 		printk(KERN_DEBUG "megasas: out of memory. Could not alloc "
@@ -470,9 +471,6 @@ megasas_alloc_cmds_fusion(struct megasas_instance *instance)
 		goto fail_cmd_list;
 	}
 
-	memset(fusion->cmd_list, 0, sizeof(struct megasas_cmd_fusion *)
-	       *max_cmd);
-
 	max_cmd = instance->max_fw_cmds;
 	for (i = 0; i < max_cmd; i++) {
 		fusion->cmd_list[i] = kmalloc(sizeof(struct megasas_cmd_fusion),
@@ -2063,9 +2061,9 @@ megasas_check_reset_fusion(struct megasas_instance *instance,
 int megasas_wait_for_outstanding_fusion(struct megasas_instance *instance)
 {
 	int i, outstanding, retval = 0;
-	u32 fw_state, wait_time = MEGASAS_RESET_WAIT_TIME;
+	u32 fw_state;
 
-	for (i = 0; i < wait_time; i++) {
+	for (i = 0; i < resetwaittime; i++) {
 		/* Check if firmware is in fault state */
 		fw_state = instance->instancet->read_fw_status_reg(
 			instance->reg_set) & MFI_STATE_MASK;