From ea61fca58c1373a48c0741798f70364d4498d2af Mon Sep 17 00:00:00 2001 From: "Martin K. Petersen" Date: Fri, 15 May 2009 00:40:33 -0400 Subject: scsi_debug: Add support for physical block exponent and alignment This patch adds support for setting the physical block exponent and lowest aligned LBA in the READ CAPACITY(16) response. The B0 VPD page is adjusted accordingly. Signed-off-by: Martin K. Petersen Acked-by: Douglas Gilbert Signed-off-by: James Bottomley --- drivers/scsi/scsi_debug.c | 30 +++++++++++++++++++++++++++++- 1 file changed, 29 insertions(+), 1 deletion(-) (limited to 'drivers/scsi/scsi_debug.c') diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c index 41a21772df12..fb9af207d61d 100644 --- a/drivers/scsi/scsi_debug.c +++ b/drivers/scsi/scsi_debug.c @@ -101,6 +101,8 @@ static const char * scsi_debug_version_date = "20070104"; #define DEF_DIF 0 #define DEF_GUARD 0 #define DEF_ATO 1 +#define DEF_PHYSBLK_EXP 0 +#define DEF_LOWEST_ALIGNED 0 /* bit mask values for scsi_debug_opts */ #define SCSI_DEBUG_OPT_NOISE 1 @@ -156,6 +158,8 @@ static int scsi_debug_dix = DEF_DIX; static int scsi_debug_dif = DEF_DIF; static int scsi_debug_guard = DEF_GUARD; static int scsi_debug_ato = DEF_ATO; +static int scsi_debug_physblk_exp = DEF_PHYSBLK_EXP; +static int scsi_debug_lowest_aligned = DEF_LOWEST_ALIGNED; static int scsi_debug_cmnd_count = 0; @@ -657,7 +661,12 @@ static unsigned char vpdb0_data[] = { static int inquiry_evpd_b0(unsigned char * arr) { + unsigned int gran; + memcpy(arr, vpdb0_data, sizeof(vpdb0_data)); + gran = 1 << scsi_debug_physblk_exp; + arr[2] = (gran >> 8) & 0xff; + arr[3] = gran & 0xff; if (sdebug_store_sectors > 0x400) { arr[4] = (sdebug_store_sectors >> 24) & 0xff; arr[5] = (sdebug_store_sectors >> 16) & 0xff; @@ -945,6 +954,9 @@ static int resp_readcap16(struct scsi_cmnd * scp, arr[9] = (scsi_debug_sector_size >> 16) & 0xff; arr[10] = (scsi_debug_sector_size >> 8) & 0xff; arr[11] = scsi_debug_sector_size & 0xff; + arr[13] = scsi_debug_physblk_exp & 0xf; + arr[14] = (scsi_debug_lowest_aligned >> 8) & 0x3f; + arr[15] = scsi_debug_lowest_aligned & 0xff; if (scsi_debug_dif) { arr[12] = (scsi_debug_dif - 1) << 1; /* P_TYPE */ @@ -2380,6 +2392,8 @@ module_param_named(dix, scsi_debug_dix, int, S_IRUGO); module_param_named(dif, scsi_debug_dif, int, S_IRUGO); module_param_named(guard, scsi_debug_guard, int, S_IRUGO); module_param_named(ato, scsi_debug_ato, int, S_IRUGO); +module_param_named(physblk_exp, scsi_debug_physblk_exp, int, S_IRUGO); +module_param_named(lowest_aligned, scsi_debug_lowest_aligned, int, S_IRUGO); MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert"); MODULE_DESCRIPTION("SCSI debug adapter driver"); @@ -2401,7 +2415,9 @@ MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])"); MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=5[SPC-3])"); MODULE_PARM_DESC(virtual_gb, "virtual gigabyte size (def=0 -> use dev_size_mb)"); MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)"); -MODULE_PARM_DESC(sector_size, "hardware sector size in bytes (def=512)"); +MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)"); +MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)"); +MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)"); MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)"); MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)"); MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)"); @@ -2874,6 +2890,18 @@ static int __init scsi_debug_init(void) return -EINVAL; } + if (scsi_debug_physblk_exp > 15) { + printk(KERN_ERR "scsi_debug_init: invalid physblk_exp %u\n", + scsi_debug_physblk_exp); + return -EINVAL; + } + + if (scsi_debug_lowest_aligned > 0x3fff) { + printk(KERN_ERR "scsi_debug_init: lowest_aligned too big: %u\n", + scsi_debug_lowest_aligned); + return -EINVAL; + } + if (scsi_debug_dev_size_mb < 1) scsi_debug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */ sz = (unsigned long)scsi_debug_dev_size_mb * 1048576; -- cgit v1.2.1