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Commit 86e6828a authored by Lukas Herbolt's avatar Lukas Herbolt Committed by Martin K. Petersen
Browse files

scsi: scsi_debug: Add OPTIMAL TRANSFER LENGTH GRANULARITY option. 



[mkp: whitespace fixes]

Signed-off-by: default avatarLukas Herbolt <lherbolt@redhat.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 7cfa7696

drivers/scsi/scsi_debug.c

+9 −1
Original line number Diff line number Diff line
@@ -125,6 +125,7 @@ static const char *sdebug_version_date = "20160430"; 
#define DEF_OPTS   0

#define DEF_OPT_BLKS 1024

#define DEF_PHYSBLK_EXP 0

#define DEF_OPT_XFERLEN_EXP 0

#define DEF_PTYPE   TYPE_DISK

#define DEF_REMOVABLE false

#define DEF_SCSI_LEVEL   7    /* INQUIRY, byte2 [6->SPC-4; 7->SPC-5] */
@@ -590,6 +591,7 @@ static int sdebug_num_tgts = DEF_NUM_TGTS; /* targets per host */ 
static int sdebug_opt_blks = DEF_OPT_BLKS;

static int sdebug_opts = DEF_OPTS;

static int sdebug_physblk_exp = DEF_PHYSBLK_EXP;

static int sdebug_opt_xferlen_exp = DEF_OPT_XFERLEN_EXP;

static int sdebug_ptype = DEF_PTYPE; /* SCSI peripheral device type */

static int sdebug_scsi_level = DEF_SCSI_LEVEL;

static int sdebug_sector_size = DEF_SECTOR_SIZE;
@@ -1205,6 +1207,10 @@ static int inquiry_vpd_b0(unsigned char *arr) 
	memcpy(arr, vpdb0_data, sizeof(vpdb0_data));



	/* Optimal transfer length granularity */

	if (sdebug_opt_xferlen_exp != 0 &&

	    sdebug_physblk_exp < sdebug_opt_xferlen_exp)

		gran = 1 << sdebug_opt_xferlen_exp;

	else

		gran = 1 << sdebug_physblk_exp;

	put_unaligned_be16(gran, arr + 2);
@@ -4161,6 +4167,7 @@ module_param_named(num_tgts, sdebug_num_tgts, int, S_IRUGO | S_IWUSR); 
module_param_named(opt_blks, sdebug_opt_blks, int, S_IRUGO);

module_param_named(opts, sdebug_opts, int, S_IRUGO | S_IWUSR);

module_param_named(physblk_exp, sdebug_physblk_exp, int, S_IRUGO);

module_param_named(opt_xferlen_exp, sdebug_opt_xferlen_exp, int, S_IRUGO);

module_param_named(ptype, sdebug_ptype, int, S_IRUGO | S_IWUSR);

module_param_named(removable, sdebug_removable, bool, S_IRUGO | S_IWUSR);

module_param_named(scsi_level, sdebug_scsi_level, int, S_IRUGO);
@@ -4212,6 +4219,7 @@ MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)"); 
MODULE_PARM_DESC(opt_blks, "optimal transfer length in blocks (def=1024)");

MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)");

MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)");

MODULE_PARM_DESC(opt_xferlen_exp, "optimal transfer length granularity exponent (def=physblk_exp)");

MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");

MODULE_PARM_DESC(removable, "claim to have removable media (def=0)");

MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=7[SPC-5])");