Commit 94a0dfcf authored by Mike Christie's avatar Mike Christie Committed by Martin K. Petersen
Browse files

scsi: tcm_loop: Allow queues, can_queue and cmd_per_lun to be settable 

Make can_queue, nr_hw_queues and cmd_per_lun settable by the user instead
of hard coding them.

Link: https://lore.kernel.org/r/1604257174-4524-9-git-send-email-michael.christie@oracle.com


Reviewed-by: default avatarHimanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: default avatarMike Christie <michael.christie@oracle.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 1526d9f1

drivers/target/loopback/tcm_loop.c

+12 −2
Original line number Diff line number Diff line
@@ -46,6 +46,15 @@ static int tcm_loop_hba_no_cnt; 


static int tcm_loop_queue_status(struct se_cmd *se_cmd);



static unsigned int tcm_loop_nr_hw_queues = 1;

module_param_named(nr_hw_queues, tcm_loop_nr_hw_queues, uint, 0644);



static unsigned int tcm_loop_can_queue = 1024;

module_param_named(can_queue, tcm_loop_can_queue, uint, 0644);



static unsigned int tcm_loop_cmd_per_lun = 1024;

module_param_named(cmd_per_lun, tcm_loop_cmd_per_lun, uint, 0644);



/*

 * Called from struct target_core_fabric_ops->check_stop_free()

 */
@@ -305,10 +314,8 @@ static struct scsi_host_template tcm_loop_driver_template = { 
	.eh_abort_handler = tcm_loop_abort_task,

	.eh_device_reset_handler = tcm_loop_device_reset,

	.eh_target_reset_handler = tcm_loop_target_reset,

	.can_queue		= 1024,

	.this_id		= -1,

	.sg_tablesize		= 256,

	.cmd_per_lun		= 1024,

	.max_sectors		= 0xFFFF,

	.dma_boundary		= PAGE_SIZE - 1,

	.module			= THIS_MODULE,
@@ -342,6 +349,9 @@ static int tcm_loop_driver_probe(struct device *dev) 
	sh->max_lun = 0;

	sh->max_channel = 0;

	sh->max_cmd_len = SCSI_MAX_VARLEN_CDB_SIZE;

	sh->nr_hw_queues = tcm_loop_nr_hw_queues;

	sh->can_queue = tcm_loop_can_queue;

	sh->cmd_per_lun = tcm_loop_cmd_per_lun;



	host_prot = SHOST_DIF_TYPE1_PROTECTION | SHOST_DIF_TYPE2_PROTECTION |

		    SHOST_DIF_TYPE3_PROTECTION | SHOST_DIX_TYPE1_PROTECTION |