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scsi: scsi_debug: Add OPTIMAL TRANSFER LENGTH GRANULARITY option. 

[mkp: whitespace fixes]

Signed-off-by: Lukas Herbolt <lherbolt@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Lukas Herbolt 2017-01-26 10:00:37 +01:00 committed by Martin K. Petersen
parent 7cfa76963f
commit 86e6828a8a
1 changed files with 9 additions and 1 deletions
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10
drivers/scsi/scsi_debug.c
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@ -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;
@ -1205,7 +1207,11 @@ static int inquiry_vpd_b0(unsigned char *arr)
memcpy(arr, vpdb0_data, sizeof(vpdb0_data));
/* Optimal transfer length granularity */
gran = 1 << sdebug_physblk_exp;
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);
/* Maximum Transfer Length */
@ -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])");