scsi: megaraid_sas: Update optimal queue depth for SAS and NVMe devices

Ideally, optimal queue depth will be provided by firmware.  The driver
defines will be used as a fallback mechanism in case the FW assisted QD is
not supported.  The driver defined values provide optimal queue depth for
most of the drives and the workloads, as is learned from the firmware
assisted QD results.

Link: https://lore.kernel.org/r/1579000882-20246-4-git-send-email-anand.lodnoor@broadcom.comSigned-off-by: NChandrakanth Patil <chandrakanth.patil@broadcom.com>
Signed-off-by: NAnand Lodnoor <anand.lodnoor@broadcom.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/megaraid/megaraid_sas.h

@@ -2233,9 +2233,9 @@ enum MR_PD_TYPE {
 
 /* JBOD Queue depth definitions */
 #define MEGASAS_SATA_QD	32
-#define MEGASAS_SAS_QD	64
+#define MEGASAS_SAS_QD 256
 #define MEGASAS_DEFAULT_PD_QD	64
-#define MEGASAS_NVME_QD		32
+#define MEGASAS_NVME_QD        64
 
 #define MR_DEFAULT_NVME_PAGE_SIZE	4096
 #define MR_DEFAULT_NVME_PAGE_SHIFT	12