From: Ching Huang <ching2048@xxxxxxxxxxxx>
add driver option host_can_queue to set host->can_queue value by user. It's value expands up to 1024
Signed-off-by: Ching Huang <ching2048@xxxxxxxxxxxx>
---
diff -uprN a/drivers/scsi/arcmsr/arcmsr.h b/drivers/scsi/arcmsr/arcmsr.h
--- a/drivers/scsi/arcmsr/arcmsr.h 2017-08-04 17:07:52.000000000 +0800
+++ b/drivers/scsi/arcmsr/arcmsr.h 2017-08-04 17:40:54.000000000 +0800
@@ -49,9 +49,11 @@ struct device_attribute;
#define ARCMSR_MAX_FREECCB_NUM 160
#define ARCMSR_MAX_OUTSTANDING_CMD 155
#else
- #define ARCMSR_MAX_FREECCB_NUM 320
-#define ARCMSR_MAX_OUTSTANDING_CMD 255
+ #define ARCMSR_MAX_FREECCB_NUM 1024
+#define ARCMSR_MAX_OUTSTANDING_CMD 1024
#endif
+#define ARCMSR_DEFAULT_OUTSTANDING_CMD 128
+#define ARCMSR_MIN_OUTSTANDING_CMD 32
#define ARCMSR_DRIVER_VERSION "v1.30.00.22-20151126"
#define ARCMSR_SCSI_INITIATOR_ID 255
#define ARCMSR_MAX_XFER_SECTORS 512
diff -uprN a/drivers/scsi/arcmsr/arcmsr_hba.c b/drivers/scsi/arcmsr/arcmsr_hba.c
--- a/drivers/scsi/arcmsr/arcmsr_hba.c 2017-11-08 18:50:28.000000000 +0800
+++ b/drivers/scsi/arcmsr/arcmsr_hba.c 2017-11-08 18:51:20.000000000 +0800
@@ -75,6 +75,10 @@ MODULE_DESCRIPTION("Areca ARC11xx/12xx/1
MODULE_LICENSE("Dual BSD/GPL");
MODULE_VERSION(ARCMSR_DRIVER_VERSION);
+static int host_can_queue = ARCMSR_DEFAULT_OUTSTANDING_CMD;
+module_param(host_can_queue, int, S_IRUGO);
+MODULE_PARM_DESC(host_can_queue, " adapter queue depth(32 ~ 1024), default is 128");
+
#define ARCMSR_SLEEPTIME 10
#define ARCMSR_RETRYCOUNT 12
@@ -133,7 +137,7 @@ static struct scsi_host_template arcmsr_
.eh_bus_reset_handler = arcmsr_bus_reset,
.bios_param = arcmsr_bios_param,
.change_queue_depth = arcmsr_adjust_disk_queue_depth,
- .can_queue = ARCMSR_MAX_OUTSTANDING_CMD,
+ .can_queue = ARCMSR_DEFAULT_OUTSTANDING_CMD,
.this_id = ARCMSR_SCSI_INITIATOR_ID,
.sg_tablesize = ARCMSR_DEFAULT_SG_ENTRIES,
.max_sectors = ARCMSR_MAX_XFER_SECTORS_C,
@@ -877,7 +881,9 @@ static int arcmsr_probe(struct pci_dev *
host->max_lun = ARCMSR_MAX_TARGETLUN;
host->max_id = ARCMSR_MAX_TARGETID; /*16:8*/
host->max_cmd_len = 16; /*this is issue of 64bit LBA ,over 2T byte*/
- host->can_queue = ARCMSR_MAX_OUTSTANDING_CMD;
+ if ((host_can_queue < ARCMSR_MIN_OUTSTANDING_CMD) || (host_can_queue > ARCMSR_MAX_OUTSTANDING_CMD))
+ host_can_queue = ARCMSR_DEFAULT_OUTSTANDING_CMD;
+ host->can_queue = host_can_queue; /* max simultaneous cmds */
host->cmd_per_lun = ARCMSR_MAX_CMD_PERLUN;
host->this_id = ARCMSR_SCSI_INITIATOR_ID;
host->unique_id = (bus << 8) | dev_fun;
@@ -3238,11 +3244,11 @@ static bool arcmsr_get_firmware_spec(str
default:
break;
}
- if (acb->firm_numbers_queue > ARCMSR_MAX_OUTSTANDING_CMD)
- acb->maxOutstanding = ARCMSR_MAX_OUTSTANDING_CMD;
+ acb->maxOutstanding = acb->firm_numbers_queue - 1;
+ if (acb->host->can_queue >= acb->firm_numbers_queue)
+ acb->host->can_queue = acb->maxOutstanding;
else
- acb->maxOutstanding = acb->firm_numbers_queue - 1;
- acb->host->can_queue = acb->maxOutstanding;
+ acb->maxOutstanding = acb->host->can_queue;
acb->maxFreeCCB = acb->host->can_queue;
if (acb->maxFreeCCB < ARCMSR_MAX_FREECCB_NUM)
acb->maxFreeCCB += 64;
