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authorMartin K. Petersen <martin.petersen@oracle.com>2009-05-15 00:40:33 -0400
committerJames Bottomley <James.Bottomley@HansenPartnership.com>2009-06-21 12:03:54 -0400
commitea61fca58c1373a48c0741798f70364d4498d2af (patch)
treeb2e8420abc140bf6c87a1cbe3ba47e68ed05d447 /drivers
parent895553824ed9d2c1409d4dc6e0db4d6dfd344679 (diff)
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 <martin.petersen@oracle.com> Acked-by: Douglas Gilbert <dgilbert@interlog.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/scsi/scsi_debug.c30
1 files changed, 29 insertions, 1 deletions
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";
101#define DEF_DIF 0 101#define DEF_DIF 0
102#define DEF_GUARD 0 102#define DEF_GUARD 0
103#define DEF_ATO 1 103#define DEF_ATO 1
104#define DEF_PHYSBLK_EXP 0
105#define DEF_LOWEST_ALIGNED 0
104 106
105/* bit mask values for scsi_debug_opts */ 107/* bit mask values for scsi_debug_opts */
106#define SCSI_DEBUG_OPT_NOISE 1 108#define SCSI_DEBUG_OPT_NOISE 1
@@ -156,6 +158,8 @@ static int scsi_debug_dix = DEF_DIX;
156static int scsi_debug_dif = DEF_DIF; 158static int scsi_debug_dif = DEF_DIF;
157static int scsi_debug_guard = DEF_GUARD; 159static int scsi_debug_guard = DEF_GUARD;
158static int scsi_debug_ato = DEF_ATO; 160static int scsi_debug_ato = DEF_ATO;
161static int scsi_debug_physblk_exp = DEF_PHYSBLK_EXP;
162static int scsi_debug_lowest_aligned = DEF_LOWEST_ALIGNED;
159 163
160static int scsi_debug_cmnd_count = 0; 164static int scsi_debug_cmnd_count = 0;
161 165
@@ -657,7 +661,12 @@ static unsigned char vpdb0_data[] = {
657 661
658static int inquiry_evpd_b0(unsigned char * arr) 662static int inquiry_evpd_b0(unsigned char * arr)
659{ 663{
664 unsigned int gran;
665
660 memcpy(arr, vpdb0_data, sizeof(vpdb0_data)); 666 memcpy(arr, vpdb0_data, sizeof(vpdb0_data));
667 gran = 1 << scsi_debug_physblk_exp;
668 arr[2] = (gran >> 8) & 0xff;
669 arr[3] = gran & 0xff;
661 if (sdebug_store_sectors > 0x400) { 670 if (sdebug_store_sectors > 0x400) {
662 arr[4] = (sdebug_store_sectors >> 24) & 0xff; 671 arr[4] = (sdebug_store_sectors >> 24) & 0xff;
663 arr[5] = (sdebug_store_sectors >> 16) & 0xff; 672 arr[5] = (sdebug_store_sectors >> 16) & 0xff;
@@ -945,6 +954,9 @@ static int resp_readcap16(struct scsi_cmnd * scp,
945 arr[9] = (scsi_debug_sector_size >> 16) & 0xff; 954 arr[9] = (scsi_debug_sector_size >> 16) & 0xff;
946 arr[10] = (scsi_debug_sector_size >> 8) & 0xff; 955 arr[10] = (scsi_debug_sector_size >> 8) & 0xff;
947 arr[11] = scsi_debug_sector_size & 0xff; 956 arr[11] = scsi_debug_sector_size & 0xff;
957 arr[13] = scsi_debug_physblk_exp & 0xf;
958 arr[14] = (scsi_debug_lowest_aligned >> 8) & 0x3f;
959 arr[15] = scsi_debug_lowest_aligned & 0xff;
948 960
949 if (scsi_debug_dif) { 961 if (scsi_debug_dif) {
950 arr[12] = (scsi_debug_dif - 1) << 1; /* P_TYPE */ 962 arr[12] = (scsi_debug_dif - 1) << 1; /* P_TYPE */
@@ -2380,6 +2392,8 @@ module_param_named(dix, scsi_debug_dix, int, S_IRUGO);
2380module_param_named(dif, scsi_debug_dif, int, S_IRUGO); 2392module_param_named(dif, scsi_debug_dif, int, S_IRUGO);
2381module_param_named(guard, scsi_debug_guard, int, S_IRUGO); 2393module_param_named(guard, scsi_debug_guard, int, S_IRUGO);
2382module_param_named(ato, scsi_debug_ato, int, S_IRUGO); 2394module_param_named(ato, scsi_debug_ato, int, S_IRUGO);
2395module_param_named(physblk_exp, scsi_debug_physblk_exp, int, S_IRUGO);
2396module_param_named(lowest_aligned, scsi_debug_lowest_aligned, int, S_IRUGO);
2383 2397
2384MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert"); 2398MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
2385MODULE_DESCRIPTION("SCSI debug adapter driver"); 2399MODULE_DESCRIPTION("SCSI debug adapter driver");
@@ -2401,7 +2415,9 @@ MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");
2401MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=5[SPC-3])"); 2415MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=5[SPC-3])");
2402MODULE_PARM_DESC(virtual_gb, "virtual gigabyte size (def=0 -> use dev_size_mb)"); 2416MODULE_PARM_DESC(virtual_gb, "virtual gigabyte size (def=0 -> use dev_size_mb)");
2403MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)"); 2417MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)");
2404MODULE_PARM_DESC(sector_size, "hardware sector size in bytes (def=512)"); 2418MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)");
2419MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)");
2420MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)");
2405MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)"); 2421MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)");
2406MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)"); 2422MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)");
2407MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)"); 2423MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)");
@@ -2874,6 +2890,18 @@ static int __init scsi_debug_init(void)
2874 return -EINVAL; 2890 return -EINVAL;
2875 } 2891 }
2876 2892
2893 if (scsi_debug_physblk_exp > 15) {
2894 printk(KERN_ERR "scsi_debug_init: invalid physblk_exp %u\n",
2895 scsi_debug_physblk_exp);
2896 return -EINVAL;
2897 }
2898
2899 if (scsi_debug_lowest_aligned > 0x3fff) {
2900 printk(KERN_ERR "scsi_debug_init: lowest_aligned too big: %u\n",
2901 scsi_debug_lowest_aligned);
2902 return -EINVAL;
2903 }
2904
2877 if (scsi_debug_dev_size_mb < 1) 2905 if (scsi_debug_dev_size_mb < 1)
2878 scsi_debug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */ 2906 scsi_debug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */
2879 sz = (unsigned long)scsi_debug_dev_size_mb * 1048576; 2907 sz = (unsigned long)scsi_debug_dev_size_mb * 1048576;