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scsi: arcmsr: Add driver option host_can_queue

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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@areca.com.tw>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Ching Huang 2017-12-05 09:47:44 +08:00 committed by Martin K. Petersen
parent d076e4aaf6
commit dd6206e151
2 changed files with 14 additions and 6 deletions
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2
drivers/scsi/arcmsr/arcmsr.h
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@ -47,6 +47,8 @@ struct device_attribute;
/*The limit of outstanding scsi command that firmware can handle*/
#define ARCMSR_MAX_FREECCB_NUM 1024
#define ARCMSR_MAX_OUTSTANDING_CMD 1024
#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

18
drivers/scsi/arcmsr/arcmsr_hba.c
View file

@ -75,6 +75,10 @@ MODULE_DESCRIPTION("Areca ARC11xx/12xx/16xx/188x SAS/SATA RAID Controller Driver
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_scsi_host_template = {
.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 *pdev, const struct pci_device_id *id)
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;
@ -3234,11 +3240,11 @@ static bool arcmsr_get_firmware_spec(struct AdapterControlBlock *acb)
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;