megaraid_sas: reserve commands for IOCTLs and internal DCMDs
1) For fusion adapters, limit reserved frames for non SCSI commands to 8
(3 for parallel IOCTLs + 5 for driver's internal DCMDs).
Earlier reserved commands for non SCSI IO frames was set to 32, so with
this implementation, increased per controller "can_queue".
Behavior of MFI controllers will remain unchanged.
2) Optimize the code related to per controller's 'can_queue' setting.
Signed-off-by: Sumit Saxena <sumit.saxena@avagotech.com>
Signed-off-by: Chaitra Basappa <chaitra.basappa@avagotech.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
diff --git a/drivers/scsi/megaraid/megaraid_sas.h b/drivers/scsi/megaraid/megaraid_sas.h
index b8b378d..793b2b3 100644
--- a/drivers/scsi/megaraid/megaraid_sas.h
+++ b/drivers/scsi/megaraid/megaraid_sas.h
@@ -1082,6 +1082,8 @@
*/
#define MEGASAS_INT_CMDS 32
#define MEGASAS_SKINNY_INT_CMDS 5
+#define MEGASAS_FUSION_INTERNAL_CMDS 5
+#define MEGASAS_FUSION_IOCTL_CMDS 3
#define MEGASAS_MAX_MSIX_QUEUES 128
/*
@@ -1687,9 +1689,8 @@
u16 max_num_sge;
u16 max_fw_cmds;
- /* For Fusion its num IOCTL cmds, for others MFI based its
- max_fw_cmds */
u16 max_mfi_cmds;
+ u16 max_scsi_cmds;
u32 max_sectors_per_req;
struct megasas_aen_event *ev;
@@ -1765,7 +1766,7 @@
u8 requestorId;
char PlasmaFW111;
char mpio;
- int throttlequeuedepth;
+ u16 throttlequeuedepth;
u8 mask_interrupts;
u8 is_imr;
};
diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c
index d4e9c4e..bf31dde 100644
--- a/drivers/scsi/megaraid/megaraid_sas_base.c
+++ b/drivers/scsi/megaraid/megaraid_sas_base.c
@@ -78,7 +78,7 @@
module_param(allow_vf_ioctls, int, S_IRUGO);
MODULE_PARM_DESC(allow_vf_ioctls, "Allow ioctls in SR-IOV VF mode. Default: 0");
-static int throttlequeuedepth = MEGASAS_THROTTLE_QUEUE_DEPTH;
+static unsigned 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");
@@ -1764,6 +1764,7 @@
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) <
@@ -1771,13 +1772,8 @@
spin_lock_irqsave(instance->host->host_lock, flags);
instance->flag &= ~MEGASAS_FW_BUSY;
- if (instance->is_imr) {
- instance->host->can_queue =
- instance->max_fw_cmds - MEGASAS_SKINNY_INT_CMDS;
- } else
- instance->host->can_queue =
- instance->max_fw_cmds - MEGASAS_INT_CMDS;
+ instance->host->can_queue = instance->max_scsi_cmds;
spin_unlock_irqrestore(instance->host->host_lock, flags);
}
}
@@ -4685,23 +4681,38 @@
if (tmp_sectors && (instance->max_sectors_per_req > tmp_sectors))
instance->max_sectors_per_req = tmp_sectors;
- /* Check for valid throttlequeuedepth module parameter */
- if (instance->is_imr) {
- if (throttlequeuedepth > (instance->max_fw_cmds -
- MEGASAS_SKINNY_INT_CMDS))
- instance->throttlequeuedepth =
- MEGASAS_THROTTLE_QUEUE_DEPTH;
- else
- instance->throttlequeuedepth = throttlequeuedepth;
+ /*
+ * 1. For fusion adapters, 3 commands for IOCTL and 5 commands
+ * for driver's internal DCMDs.
+ * 2. For MFI skinny adapters, 5 commands for IOCTL + driver's
+ * internal DCMDs.
+ * 3. For rest of MFI adapters, 27 commands reserved for IOCTLs
+ * and 5 commands for drivers's internal DCMD.
+ */
+ if (instance->ctrl_context) {
+ instance->max_scsi_cmds = instance->max_fw_cmds -
+ (MEGASAS_FUSION_INTERNAL_CMDS +
+ MEGASAS_FUSION_IOCTL_CMDS);
+ sema_init(&instance->ioctl_sem, MEGASAS_FUSION_IOCTL_CMDS);
+ } else if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
+ (instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0071SKINNY)) {
+ instance->max_scsi_cmds = instance->max_fw_cmds -
+ MEGASAS_SKINNY_INT_CMDS;
+ sema_init(&instance->ioctl_sem, MEGASAS_SKINNY_INT_CMDS);
} else {
- if (throttlequeuedepth > (instance->max_fw_cmds -
- MEGASAS_INT_CMDS))
- instance->throttlequeuedepth =
- MEGASAS_THROTTLE_QUEUE_DEPTH;
- else
- instance->throttlequeuedepth = throttlequeuedepth;
+ instance->max_scsi_cmds = instance->max_fw_cmds -
+ MEGASAS_INT_CMDS;
+ sema_init(&instance->ioctl_sem, (MEGASAS_INT_CMDS - 5));
}
+ /* Check for valid throttlequeuedepth module parameter */
+ if (throttlequeuedepth &&
+ throttlequeuedepth <= instance->max_scsi_cmds)
+ instance->throttlequeuedepth = throttlequeuedepth;
+ else
+ instance->throttlequeuedepth =
+ MEGASAS_THROTTLE_QUEUE_DEPTH;
+
/*
* Setup tasklet for cmd completion
*/
@@ -4996,12 +5007,7 @@
*/
host->irq = instance->pdev->irq;
host->unique_id = instance->unique_id;
- if (instance->is_imr) {
- host->can_queue =
- instance->max_fw_cmds - MEGASAS_SKINNY_INT_CMDS;
- } else
- host->can_queue =
- instance->max_fw_cmds - MEGASAS_INT_CMDS;
+ host->can_queue = instance->max_scsi_cmds;
host->this_id = instance->init_id;
host->sg_tablesize = instance->max_num_sge;
@@ -5264,12 +5270,10 @@
instance->init_id = MEGASAS_DEFAULT_INIT_ID;
instance->ctrl_info = NULL;
+
if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
- (instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0071SKINNY)) {
+ (instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0071SKINNY))
instance->flag_ieee = 1;
- sema_init(&instance->ioctl_sem, MEGASAS_SKINNY_INT_CMDS);
- } else
- sema_init(&instance->ioctl_sem, (MEGASAS_INT_CMDS - 5));
megasas_dbg_lvl = 0;
instance->flag = 0;
@@ -6264,9 +6268,6 @@
goto out_kfree_ioc;
}
- /*
- * We will allow only MEGASAS_INT_CMDS number of parallel ioctl cmds
- */
if (down_interruptible(&instance->ioctl_sem)) {
error = -ERESTARTSYS;
goto out_kfree_ioc;
diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c
index df280b1..675b5e7 100644
--- a/drivers/scsi/megaraid/megaraid_sas_fusion.c
+++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c
@@ -1019,8 +1019,12 @@
* does not exceed max cmds that the FW can support
*/
instance->max_fw_cmds = instance->max_fw_cmds-1;
- /* Only internal cmds (DCMD) need to have MFI frames */
- instance->max_mfi_cmds = MEGASAS_INT_CMDS;
+
+ /*
+ * Only Driver's internal DCMDs and IOCTL DCMDs needs to have MFI frames
+ */
+ instance->max_mfi_cmds =
+ MEGASAS_FUSION_INTERNAL_CMDS + MEGASAS_FUSION_IOCTL_CMDS;
max_cmd = instance->max_fw_cmds;