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Commit abf33d83 authored by Ching Huang's avatar Ching Huang Committed by Martin K. Petersen
Browse files

scsi: arcmsr: Add driver option cmd_per_lun 



Add driver option cmd_per_lun to set host->cmd_per_lun value by user.

Signed-off-by: default avatarChing Huang <ching2048@areca.com.tw>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent e4587f45

drivers/scsi/arcmsr/arcmsr.h

+3 −1
Original line number Diff line number Diff line
@@ -56,7 +56,9 @@ struct device_attribute; 
#define ARCMSR_MAX_XFER_SECTORS_C						304

#define ARCMSR_MAX_TARGETID							17

#define ARCMSR_MAX_TARGETLUN							8

#define ARCMSR_MAX_CMD_PERLUN		                 ARCMSR_MAX_OUTSTANDING_CMD

#define ARCMSR_MAX_CMD_PERLUN		128

#define ARCMSR_DEFAULT_CMD_PERLUN	32

#define ARCMSR_MIN_CMD_PERLUN		1

#define ARCMSR_MAX_QBUFFER							4096

#define ARCMSR_DEFAULT_SG_ENTRIES						38

#define ARCMSR_MAX_HBB_POSTQUEUE						264

drivers/scsi/arcmsr/arcmsr_hba.c

+8 −2
Original line number Diff line number Diff line
@@ -79,6 +79,10 @@ 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");



static int cmd_per_lun = ARCMSR_DEFAULT_CMD_PERLUN;

module_param(cmd_per_lun, int, S_IRUGO);

MODULE_PARM_DESC(cmd_per_lun, " device queue depth(1 ~ 128), default is 32");



#define	ARCMSR_SLEEPTIME	10

#define	ARCMSR_RETRYCOUNT	12
@@ -141,7 +145,7 @@ static struct scsi_host_template arcmsr_scsi_host_template = { 
	.this_id			= ARCMSR_SCSI_INITIATOR_ID,

	.sg_tablesize	        	= ARCMSR_DEFAULT_SG_ENTRIES, 

	.max_sectors    	    	= ARCMSR_MAX_XFER_SECTORS_C, 

	.cmd_per_lun		= ARCMSR_MAX_CMD_PERLUN,

	.cmd_per_lun		= ARCMSR_DEFAULT_CMD_PERLUN,

	.use_clustering		= ENABLE_CLUSTERING,

	.shost_attrs		= arcmsr_host_attrs,

	.no_write_same		= 1,
@@ -884,7 +888,9 @@ static int arcmsr_probe(struct pci_dev *pdev, const struct pci_device_id *id) 
	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;	    

	if ((cmd_per_lun < ARCMSR_MIN_CMD_PERLUN) || (cmd_per_lun > ARCMSR_MAX_CMD_PERLUN))

		cmd_per_lun = ARCMSR_DEFAULT_CMD_PERLUN;

	host->cmd_per_lun = cmd_per_lun;

	host->this_id = ARCMSR_SCSI_INITIATOR_ID;

	host->unique_id = (bus << 8) | dev_fun;

	pci_set_drvdata(pdev, host);