Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * sd.c Copyright (C) 1992 Drew Eckhardt |
| 3 | * Copyright (C) 1993, 1994, 1995, 1999 Eric Youngdale |
| 4 | * |
| 5 | * Linux scsi disk driver |
| 6 | * Initial versions: Drew Eckhardt |
| 7 | * Subsequent revisions: Eric Youngdale |
| 8 | * Modification history: |
| 9 | * - Drew Eckhardt <drew@colorado.edu> original |
| 10 | * - Eric Youngdale <eric@andante.org> add scatter-gather, multiple |
| 11 | * outstanding request, and other enhancements. |
| 12 | * Support loadable low-level scsi drivers. |
| 13 | * - Jirka Hanika <geo@ff.cuni.cz> support more scsi disks using |
| 14 | * eight major numbers. |
| 15 | * - Richard Gooch <rgooch@atnf.csiro.au> support devfs. |
| 16 | * - Torben Mathiasen <tmm@image.dk> Resource allocation fixes in |
| 17 | * sd_init and cleanups. |
| 18 | * - Alex Davis <letmein@erols.com> Fix problem where partition info |
| 19 | * not being read in sd_open. Fix problem where removable media |
| 20 | * could be ejected after sd_open. |
| 21 | * - Douglas Gilbert <dgilbert@interlog.com> cleanup for lk 2.5.x |
| 22 | * - Badari Pulavarty <pbadari@us.ibm.com>, Matthew Wilcox |
| 23 | * <willy@debian.org>, Kurt Garloff <garloff@suse.de>: |
| 24 | * Support 32k/1M disks. |
| 25 | * |
| 26 | * Logging policy (needs CONFIG_SCSI_LOGGING defined): |
| 27 | * - setting up transfer: SCSI_LOG_HLQUEUE levels 1 and 2 |
| 28 | * - end of transfer (bh + scsi_lib): SCSI_LOG_HLCOMPLETE level 1 |
| 29 | * - entering sd_ioctl: SCSI_LOG_IOCTL level 1 |
| 30 | * - entering other commands: SCSI_LOG_HLQUEUE level 3 |
| 31 | * Note: when the logging level is set by the user, it must be greater |
| 32 | * than the level indicated above to trigger output. |
| 33 | */ |
| 34 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <linux/module.h> |
| 36 | #include <linux/fs.h> |
| 37 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #include <linux/mm.h> |
| 39 | #include <linux/bio.h> |
| 40 | #include <linux/genhd.h> |
| 41 | #include <linux/hdreg.h> |
| 42 | #include <linux/errno.h> |
| 43 | #include <linux/idr.h> |
| 44 | #include <linux/interrupt.h> |
| 45 | #include <linux/init.h> |
| 46 | #include <linux/blkdev.h> |
| 47 | #include <linux/blkpg.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | #include <linux/delay.h> |
Arjan van de Ven | 0b95067 | 2006-01-11 13:16:10 +0100 | [diff] [blame] | 49 | #include <linux/mutex.h> |
James Bottomley | 7404ad3b | 2008-08-31 10:41:52 -0500 | [diff] [blame] | 50 | #include <linux/string_helpers.h> |
Arjan van de Ven | 4ace92f | 2009-01-04 05:32:28 -0800 | [diff] [blame] | 51 | #include <linux/async.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 52 | #include <linux/slab.h> |
Lin Ming | 54f57588 | 2011-12-05 09:20:26 +0800 | [diff] [blame] | 53 | #include <linux/pm_runtime.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | #include <asm/uaccess.h> |
Dave Hansen | 8f76d15 | 2009-04-21 16:43:27 -0700 | [diff] [blame] | 55 | #include <asm/unaligned.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | |
| 57 | #include <scsi/scsi.h> |
| 58 | #include <scsi/scsi_cmnd.h> |
| 59 | #include <scsi/scsi_dbg.h> |
| 60 | #include <scsi/scsi_device.h> |
| 61 | #include <scsi/scsi_driver.h> |
| 62 | #include <scsi/scsi_eh.h> |
| 63 | #include <scsi/scsi_host.h> |
| 64 | #include <scsi/scsi_ioctl.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | #include <scsi/scsicam.h> |
| 66 | |
Martin K. Petersen | aa91696 | 2008-06-17 12:47:32 -0400 | [diff] [blame] | 67 | #include "sd.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | #include "scsi_logging.h" |
| 69 | |
Rene Herman | f018fa5 | 2006-03-08 00:14:20 -0800 | [diff] [blame] | 70 | MODULE_AUTHOR("Eric Youngdale"); |
| 71 | MODULE_DESCRIPTION("SCSI disk (sd) driver"); |
| 72 | MODULE_LICENSE("GPL"); |
| 73 | |
| 74 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK0_MAJOR); |
| 75 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK1_MAJOR); |
| 76 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK2_MAJOR); |
| 77 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK3_MAJOR); |
| 78 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK4_MAJOR); |
| 79 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK5_MAJOR); |
| 80 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK6_MAJOR); |
| 81 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK7_MAJOR); |
| 82 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK8_MAJOR); |
| 83 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK9_MAJOR); |
| 84 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK10_MAJOR); |
| 85 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK11_MAJOR); |
| 86 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK12_MAJOR); |
| 87 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK13_MAJOR); |
| 88 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK14_MAJOR); |
| 89 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK15_MAJOR); |
Michael Tokarev | d7b8bcb | 2006-10-27 16:02:37 +0400 | [diff] [blame] | 90 | MODULE_ALIAS_SCSI_DEVICE(TYPE_DISK); |
| 91 | MODULE_ALIAS_SCSI_DEVICE(TYPE_MOD); |
| 92 | MODULE_ALIAS_SCSI_DEVICE(TYPE_RBC); |
Rene Herman | f018fa5 | 2006-03-08 00:14:20 -0800 | [diff] [blame] | 93 | |
Tejun Heo | 870d665 | 2008-08-25 19:47:25 +0900 | [diff] [blame] | 94 | #if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT) |
Tejun Heo | f615b48 | 2008-08-25 19:47:24 +0900 | [diff] [blame] | 95 | #define SD_MINORS 16 |
Tejun Heo | 870d665 | 2008-08-25 19:47:25 +0900 | [diff] [blame] | 96 | #else |
Tejun Heo | 3e1a7ff | 2008-08-25 19:56:17 +0900 | [diff] [blame] | 97 | #define SD_MINORS 0 |
Tejun Heo | 870d665 | 2008-08-25 19:47:25 +0900 | [diff] [blame] | 98 | #endif |
| 99 | |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 100 | static void sd_config_discard(struct scsi_disk *, unsigned int); |
Linus Torvalds | 7b3d954 | 2008-01-06 10:17:12 -0800 | [diff] [blame] | 101 | static int sd_revalidate_disk(struct gendisk *); |
Tejun Heo | 72ec24b | 2010-05-15 20:09:32 +0200 | [diff] [blame] | 102 | static void sd_unlock_native_capacity(struct gendisk *disk); |
Linus Torvalds | 7b3d954 | 2008-01-06 10:17:12 -0800 | [diff] [blame] | 103 | static int sd_probe(struct device *); |
| 104 | static int sd_remove(struct device *); |
| 105 | static void sd_shutdown(struct device *); |
| 106 | static int sd_suspend(struct device *, pm_message_t state); |
| 107 | static int sd_resume(struct device *); |
| 108 | static void sd_rescan(struct device *); |
| 109 | static int sd_done(struct scsi_cmnd *); |
| 110 | static void sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer); |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 111 | static void scsi_disk_release(struct device *cdev); |
Linus Torvalds | 7b3d954 | 2008-01-06 10:17:12 -0800 | [diff] [blame] | 112 | static void sd_print_sense_hdr(struct scsi_disk *, struct scsi_sense_hdr *); |
| 113 | static void sd_print_result(struct scsi_disk *, int); |
| 114 | |
Tejun Heo | 4034cc6 | 2009-02-21 11:04:45 +0900 | [diff] [blame] | 115 | static DEFINE_SPINLOCK(sd_index_lock); |
Tejun Heo | f27bac2 | 2008-07-14 14:59:30 +0900 | [diff] [blame] | 116 | static DEFINE_IDA(sd_index_ida); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | |
| 118 | /* This semaphore is used to mediate the 0->1 reference get in the |
| 119 | * face of object destruction (i.e. we can't allow a get on an |
| 120 | * object after last put) */ |
Arjan van de Ven | 0b95067 | 2006-01-11 13:16:10 +0100 | [diff] [blame] | 121 | static DEFINE_MUTEX(sd_ref_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | |
H Hartley Sweeten | 439d77f | 2010-08-10 18:01:20 -0700 | [diff] [blame] | 123 | static struct kmem_cache *sd_cdb_cache; |
| 124 | static mempool_t *sd_cdb_pool; |
Martin K. Petersen | 4e7392e | 2009-09-20 16:49:38 -0400 | [diff] [blame] | 125 | |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 126 | static const char *sd_cache_types[] = { |
| 127 | "write through", "none", "write back", |
| 128 | "write back, no read (daft)" |
| 129 | }; |
| 130 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 131 | static ssize_t |
| 132 | sd_store_cache_type(struct device *dev, struct device_attribute *attr, |
| 133 | const char *buf, size_t count) |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 134 | { |
| 135 | int i, ct = -1, rcd, wce, sp; |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 136 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 137 | struct scsi_device *sdp = sdkp->device; |
| 138 | char buffer[64]; |
| 139 | char *buffer_data; |
| 140 | struct scsi_mode_data data; |
| 141 | struct scsi_sense_hdr sshdr; |
| 142 | int len; |
| 143 | |
| 144 | if (sdp->type != TYPE_DISK) |
| 145 | /* no cache control on RBC devices; theoretically they |
| 146 | * can do it, but there's probably so many exceptions |
| 147 | * it's not worth the risk */ |
| 148 | return -EINVAL; |
| 149 | |
Tobias Klauser | 6391a11 | 2006-06-08 22:23:48 -0700 | [diff] [blame] | 150 | for (i = 0; i < ARRAY_SIZE(sd_cache_types); i++) { |
H Hartley Sweeten | 439d77f | 2010-08-10 18:01:20 -0700 | [diff] [blame] | 151 | len = strlen(sd_cache_types[i]); |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 152 | if (strncmp(sd_cache_types[i], buf, len) == 0 && |
| 153 | buf[len] == '\n') { |
| 154 | ct = i; |
| 155 | break; |
| 156 | } |
| 157 | } |
| 158 | if (ct < 0) |
| 159 | return -EINVAL; |
| 160 | rcd = ct & 0x01 ? 1 : 0; |
| 161 | wce = ct & 0x02 ? 1 : 0; |
| 162 | if (scsi_mode_sense(sdp, 0x08, 8, buffer, sizeof(buffer), SD_TIMEOUT, |
| 163 | SD_MAX_RETRIES, &data, NULL)) |
| 164 | return -EINVAL; |
Andrew Morton | a9312fb | 2006-03-25 03:08:30 -0800 | [diff] [blame] | 165 | len = min_t(size_t, sizeof(buffer), data.length - data.header_length - |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 166 | data.block_descriptor_length); |
| 167 | buffer_data = buffer + data.header_length + |
| 168 | data.block_descriptor_length; |
| 169 | buffer_data[2] &= ~0x05; |
| 170 | buffer_data[2] |= wce << 2 | rcd; |
| 171 | sp = buffer_data[0] & 0x80 ? 1 : 0; |
| 172 | |
| 173 | if (scsi_mode_select(sdp, 1, sp, 8, buffer_data, len, SD_TIMEOUT, |
| 174 | SD_MAX_RETRIES, &data, &sshdr)) { |
| 175 | if (scsi_sense_valid(&sshdr)) |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 176 | sd_print_sense_hdr(sdkp, &sshdr); |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 177 | return -EINVAL; |
| 178 | } |
Andrew Patterson | f98a8ca | 2008-09-04 14:27:35 -0600 | [diff] [blame] | 179 | revalidate_disk(sdkp->disk); |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 180 | return count; |
| 181 | } |
| 182 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 183 | static ssize_t |
| 184 | sd_store_manage_start_stop(struct device *dev, struct device_attribute *attr, |
| 185 | const char *buf, size_t count) |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 186 | { |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 187 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 188 | struct scsi_device *sdp = sdkp->device; |
| 189 | |
| 190 | if (!capable(CAP_SYS_ADMIN)) |
| 191 | return -EACCES; |
| 192 | |
| 193 | sdp->manage_start_stop = simple_strtoul(buf, NULL, 10); |
| 194 | |
| 195 | return count; |
| 196 | } |
| 197 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 198 | static ssize_t |
| 199 | sd_store_allow_restart(struct device *dev, struct device_attribute *attr, |
| 200 | const char *buf, size_t count) |
Brian King | a144c5a | 2006-06-27 11:10:31 -0500 | [diff] [blame] | 201 | { |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 202 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
Brian King | a144c5a | 2006-06-27 11:10:31 -0500 | [diff] [blame] | 203 | struct scsi_device *sdp = sdkp->device; |
| 204 | |
| 205 | if (!capable(CAP_SYS_ADMIN)) |
| 206 | return -EACCES; |
| 207 | |
| 208 | if (sdp->type != TYPE_DISK) |
| 209 | return -EINVAL; |
| 210 | |
| 211 | sdp->allow_restart = simple_strtoul(buf, NULL, 10); |
| 212 | |
| 213 | return count; |
| 214 | } |
| 215 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 216 | static ssize_t |
| 217 | sd_show_cache_type(struct device *dev, struct device_attribute *attr, |
| 218 | char *buf) |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 219 | { |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 220 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 221 | int ct = sdkp->RCD + 2*sdkp->WCE; |
| 222 | |
| 223 | return snprintf(buf, 40, "%s\n", sd_cache_types[ct]); |
| 224 | } |
| 225 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 226 | static ssize_t |
| 227 | sd_show_fua(struct device *dev, struct device_attribute *attr, char *buf) |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 228 | { |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 229 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 230 | |
| 231 | return snprintf(buf, 20, "%u\n", sdkp->DPOFUA); |
| 232 | } |
| 233 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 234 | static ssize_t |
| 235 | sd_show_manage_start_stop(struct device *dev, struct device_attribute *attr, |
| 236 | char *buf) |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 237 | { |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 238 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 239 | struct scsi_device *sdp = sdkp->device; |
| 240 | |
| 241 | return snprintf(buf, 20, "%u\n", sdp->manage_start_stop); |
| 242 | } |
| 243 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 244 | static ssize_t |
| 245 | sd_show_allow_restart(struct device *dev, struct device_attribute *attr, |
| 246 | char *buf) |
Brian King | a144c5a | 2006-06-27 11:10:31 -0500 | [diff] [blame] | 247 | { |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 248 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
Brian King | a144c5a | 2006-06-27 11:10:31 -0500 | [diff] [blame] | 249 | |
| 250 | return snprintf(buf, 40, "%d\n", sdkp->device->allow_restart); |
| 251 | } |
| 252 | |
Martin K. Petersen | e0597d7 | 2008-07-17 04:28:34 -0400 | [diff] [blame] | 253 | static ssize_t |
| 254 | sd_show_protection_type(struct device *dev, struct device_attribute *attr, |
| 255 | char *buf) |
| 256 | { |
| 257 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
| 258 | |
| 259 | return snprintf(buf, 20, "%u\n", sdkp->protection_type); |
| 260 | } |
| 261 | |
| 262 | static ssize_t |
Martin K. Petersen | 518fa8e | 2010-10-08 01:36:24 -0400 | [diff] [blame] | 263 | sd_show_protection_mode(struct device *dev, struct device_attribute *attr, |
| 264 | char *buf) |
| 265 | { |
| 266 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
| 267 | struct scsi_device *sdp = sdkp->device; |
| 268 | unsigned int dif, dix; |
| 269 | |
| 270 | dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type); |
| 271 | dix = scsi_host_dix_capable(sdp->host, sdkp->protection_type); |
| 272 | |
| 273 | if (!dix && scsi_host_dix_capable(sdp->host, SD_DIF_TYPE0_PROTECTION)) { |
| 274 | dif = 0; |
| 275 | dix = 1; |
| 276 | } |
| 277 | |
| 278 | if (!dif && !dix) |
| 279 | return snprintf(buf, 20, "none\n"); |
| 280 | |
| 281 | return snprintf(buf, 20, "%s%u\n", dix ? "dix" : "dif", dif); |
| 282 | } |
| 283 | |
| 284 | static ssize_t |
Martin K. Petersen | e0597d7 | 2008-07-17 04:28:34 -0400 | [diff] [blame] | 285 | sd_show_app_tag_own(struct device *dev, struct device_attribute *attr, |
| 286 | char *buf) |
| 287 | { |
| 288 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
| 289 | |
| 290 | return snprintf(buf, 20, "%u\n", sdkp->ATO); |
| 291 | } |
| 292 | |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 293 | static ssize_t |
| 294 | sd_show_thin_provisioning(struct device *dev, struct device_attribute *attr, |
| 295 | char *buf) |
| 296 | { |
| 297 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
| 298 | |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 299 | return snprintf(buf, 20, "%u\n", sdkp->lbpme); |
| 300 | } |
| 301 | |
| 302 | static const char *lbp_mode[] = { |
| 303 | [SD_LBP_FULL] = "full", |
| 304 | [SD_LBP_UNMAP] = "unmap", |
| 305 | [SD_LBP_WS16] = "writesame_16", |
| 306 | [SD_LBP_WS10] = "writesame_10", |
| 307 | [SD_LBP_ZERO] = "writesame_zero", |
| 308 | [SD_LBP_DISABLE] = "disabled", |
| 309 | }; |
| 310 | |
| 311 | static ssize_t |
| 312 | sd_show_provisioning_mode(struct device *dev, struct device_attribute *attr, |
| 313 | char *buf) |
| 314 | { |
| 315 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
| 316 | |
| 317 | return snprintf(buf, 20, "%s\n", lbp_mode[sdkp->provisioning_mode]); |
| 318 | } |
| 319 | |
| 320 | static ssize_t |
| 321 | sd_store_provisioning_mode(struct device *dev, struct device_attribute *attr, |
| 322 | const char *buf, size_t count) |
| 323 | { |
| 324 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
| 325 | struct scsi_device *sdp = sdkp->device; |
| 326 | |
| 327 | if (!capable(CAP_SYS_ADMIN)) |
| 328 | return -EACCES; |
| 329 | |
| 330 | if (sdp->type != TYPE_DISK) |
| 331 | return -EINVAL; |
| 332 | |
| 333 | if (!strncmp(buf, lbp_mode[SD_LBP_UNMAP], 20)) |
| 334 | sd_config_discard(sdkp, SD_LBP_UNMAP); |
| 335 | else if (!strncmp(buf, lbp_mode[SD_LBP_WS16], 20)) |
| 336 | sd_config_discard(sdkp, SD_LBP_WS16); |
| 337 | else if (!strncmp(buf, lbp_mode[SD_LBP_WS10], 20)) |
| 338 | sd_config_discard(sdkp, SD_LBP_WS10); |
| 339 | else if (!strncmp(buf, lbp_mode[SD_LBP_ZERO], 20)) |
| 340 | sd_config_discard(sdkp, SD_LBP_ZERO); |
| 341 | else if (!strncmp(buf, lbp_mode[SD_LBP_DISABLE], 20)) |
| 342 | sd_config_discard(sdkp, SD_LBP_DISABLE); |
| 343 | else |
| 344 | return -EINVAL; |
| 345 | |
| 346 | return count; |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 347 | } |
| 348 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 349 | static struct device_attribute sd_disk_attrs[] = { |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 350 | __ATTR(cache_type, S_IRUGO|S_IWUSR, sd_show_cache_type, |
| 351 | sd_store_cache_type), |
| 352 | __ATTR(FUA, S_IRUGO, sd_show_fua, NULL), |
Brian King | a144c5a | 2006-06-27 11:10:31 -0500 | [diff] [blame] | 353 | __ATTR(allow_restart, S_IRUGO|S_IWUSR, sd_show_allow_restart, |
| 354 | sd_store_allow_restart), |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 355 | __ATTR(manage_start_stop, S_IRUGO|S_IWUSR, sd_show_manage_start_stop, |
| 356 | sd_store_manage_start_stop), |
Martin K. Petersen | e0597d7 | 2008-07-17 04:28:34 -0400 | [diff] [blame] | 357 | __ATTR(protection_type, S_IRUGO, sd_show_protection_type, NULL), |
Martin K. Petersen | 518fa8e | 2010-10-08 01:36:24 -0400 | [diff] [blame] | 358 | __ATTR(protection_mode, S_IRUGO, sd_show_protection_mode, NULL), |
Martin K. Petersen | e0597d7 | 2008-07-17 04:28:34 -0400 | [diff] [blame] | 359 | __ATTR(app_tag_own, S_IRUGO, sd_show_app_tag_own, NULL), |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 360 | __ATTR(thin_provisioning, S_IRUGO, sd_show_thin_provisioning, NULL), |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 361 | __ATTR(provisioning_mode, S_IRUGO|S_IWUSR, sd_show_provisioning_mode, |
| 362 | sd_store_provisioning_mode), |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 363 | __ATTR_NULL, |
| 364 | }; |
| 365 | |
| 366 | static struct class sd_disk_class = { |
| 367 | .name = "scsi_disk", |
| 368 | .owner = THIS_MODULE, |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 369 | .dev_release = scsi_disk_release, |
| 370 | .dev_attrs = sd_disk_attrs, |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 371 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | |
| 373 | static struct scsi_driver sd_template = { |
| 374 | .owner = THIS_MODULE, |
| 375 | .gendrv = { |
| 376 | .name = "sd", |
| 377 | .probe = sd_probe, |
| 378 | .remove = sd_remove, |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 379 | .suspend = sd_suspend, |
| 380 | .resume = sd_resume, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | .shutdown = sd_shutdown, |
| 382 | }, |
| 383 | .rescan = sd_rescan, |
Linus Torvalds | 7b3d954 | 2008-01-06 10:17:12 -0800 | [diff] [blame] | 384 | .done = sd_done, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | }; |
| 386 | |
| 387 | /* |
| 388 | * Device no to disk mapping: |
| 389 | * |
| 390 | * major disc2 disc p1 |
| 391 | * |............|.............|....|....| <- dev_t |
| 392 | * 31 20 19 8 7 4 3 0 |
| 393 | * |
| 394 | * Inside a major, we have 16k disks, however mapped non- |
| 395 | * contiguously. The first 16 disks are for major0, the next |
| 396 | * ones with major1, ... Disk 256 is for major0 again, disk 272 |
| 397 | * for major1, ... |
| 398 | * As we stay compatible with our numbering scheme, we can reuse |
| 399 | * the well-know SCSI majors 8, 65--71, 136--143. |
| 400 | */ |
| 401 | static int sd_major(int major_idx) |
| 402 | { |
| 403 | switch (major_idx) { |
| 404 | case 0: |
| 405 | return SCSI_DISK0_MAJOR; |
| 406 | case 1 ... 7: |
| 407 | return SCSI_DISK1_MAJOR + major_idx - 1; |
| 408 | case 8 ... 15: |
| 409 | return SCSI_DISK8_MAJOR + major_idx - 8; |
| 410 | default: |
| 411 | BUG(); |
| 412 | return 0; /* shut up gcc */ |
| 413 | } |
| 414 | } |
| 415 | |
Alan Stern | 39b7f1e | 2005-11-04 14:44:41 -0500 | [diff] [blame] | 416 | static struct scsi_disk *__scsi_disk_get(struct gendisk *disk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | { |
| 418 | struct scsi_disk *sdkp = NULL; |
| 419 | |
Alan Stern | 39b7f1e | 2005-11-04 14:44:41 -0500 | [diff] [blame] | 420 | if (disk->private_data) { |
| 421 | sdkp = scsi_disk(disk); |
| 422 | if (scsi_device_get(sdkp->device) == 0) |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 423 | get_device(&sdkp->dev); |
Alan Stern | 39b7f1e | 2005-11-04 14:44:41 -0500 | [diff] [blame] | 424 | else |
| 425 | sdkp = NULL; |
| 426 | } |
| 427 | return sdkp; |
| 428 | } |
| 429 | |
| 430 | static struct scsi_disk *scsi_disk_get(struct gendisk *disk) |
| 431 | { |
| 432 | struct scsi_disk *sdkp; |
| 433 | |
Arjan van de Ven | 0b95067 | 2006-01-11 13:16:10 +0100 | [diff] [blame] | 434 | mutex_lock(&sd_ref_mutex); |
Alan Stern | 39b7f1e | 2005-11-04 14:44:41 -0500 | [diff] [blame] | 435 | sdkp = __scsi_disk_get(disk); |
Arjan van de Ven | 0b95067 | 2006-01-11 13:16:10 +0100 | [diff] [blame] | 436 | mutex_unlock(&sd_ref_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | return sdkp; |
Alan Stern | 39b7f1e | 2005-11-04 14:44:41 -0500 | [diff] [blame] | 438 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | |
Alan Stern | 39b7f1e | 2005-11-04 14:44:41 -0500 | [diff] [blame] | 440 | static struct scsi_disk *scsi_disk_get_from_dev(struct device *dev) |
| 441 | { |
| 442 | struct scsi_disk *sdkp; |
| 443 | |
Arjan van de Ven | 0b95067 | 2006-01-11 13:16:10 +0100 | [diff] [blame] | 444 | mutex_lock(&sd_ref_mutex); |
Alan Stern | 39b7f1e | 2005-11-04 14:44:41 -0500 | [diff] [blame] | 445 | sdkp = dev_get_drvdata(dev); |
| 446 | if (sdkp) |
| 447 | sdkp = __scsi_disk_get(sdkp->disk); |
Arjan van de Ven | 0b95067 | 2006-01-11 13:16:10 +0100 | [diff] [blame] | 448 | mutex_unlock(&sd_ref_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | return sdkp; |
| 450 | } |
| 451 | |
| 452 | static void scsi_disk_put(struct scsi_disk *sdkp) |
| 453 | { |
| 454 | struct scsi_device *sdev = sdkp->device; |
| 455 | |
Arjan van de Ven | 0b95067 | 2006-01-11 13:16:10 +0100 | [diff] [blame] | 456 | mutex_lock(&sd_ref_mutex); |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 457 | put_device(&sdkp->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | scsi_device_put(sdev); |
Arjan van de Ven | 0b95067 | 2006-01-11 13:16:10 +0100 | [diff] [blame] | 459 | mutex_unlock(&sd_ref_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | } |
| 461 | |
Martin K. Petersen | 35e1a5d | 2009-09-18 17:33:00 -0400 | [diff] [blame] | 462 | static void sd_prot_op(struct scsi_cmnd *scmd, unsigned int dif) |
| 463 | { |
| 464 | unsigned int prot_op = SCSI_PROT_NORMAL; |
| 465 | unsigned int dix = scsi_prot_sg_count(scmd); |
| 466 | |
| 467 | if (scmd->sc_data_direction == DMA_FROM_DEVICE) { |
| 468 | if (dif && dix) |
| 469 | prot_op = SCSI_PROT_READ_PASS; |
| 470 | else if (dif && !dix) |
| 471 | prot_op = SCSI_PROT_READ_STRIP; |
| 472 | else if (!dif && dix) |
| 473 | prot_op = SCSI_PROT_READ_INSERT; |
| 474 | } else { |
| 475 | if (dif && dix) |
| 476 | prot_op = SCSI_PROT_WRITE_PASS; |
| 477 | else if (dif && !dix) |
| 478 | prot_op = SCSI_PROT_WRITE_INSERT; |
| 479 | else if (!dif && dix) |
| 480 | prot_op = SCSI_PROT_WRITE_STRIP; |
| 481 | } |
| 482 | |
| 483 | scsi_set_prot_op(scmd, prot_op); |
| 484 | scsi_set_prot_type(scmd, dif); |
| 485 | } |
| 486 | |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 487 | static void sd_config_discard(struct scsi_disk *sdkp, unsigned int mode) |
| 488 | { |
| 489 | struct request_queue *q = sdkp->disk->queue; |
| 490 | unsigned int logical_block_size = sdkp->device->sector_size; |
| 491 | unsigned int max_blocks = 0; |
| 492 | |
| 493 | q->limits.discard_zeroes_data = sdkp->lbprz; |
Martin K. Petersen | 2a8cfad | 2011-05-18 00:31:07 -0400 | [diff] [blame] | 494 | q->limits.discard_alignment = sdkp->unmap_alignment * |
| 495 | logical_block_size; |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 496 | q->limits.discard_granularity = |
| 497 | max(sdkp->physical_block_size, |
| 498 | sdkp->unmap_granularity * logical_block_size); |
| 499 | |
| 500 | switch (mode) { |
| 501 | |
| 502 | case SD_LBP_DISABLE: |
| 503 | q->limits.max_discard_sectors = 0; |
| 504 | queue_flag_clear_unlocked(QUEUE_FLAG_DISCARD, q); |
| 505 | return; |
| 506 | |
| 507 | case SD_LBP_UNMAP: |
| 508 | max_blocks = min_not_zero(sdkp->max_unmap_blocks, 0xffffffff); |
| 509 | break; |
| 510 | |
| 511 | case SD_LBP_WS16: |
| 512 | max_blocks = min_not_zero(sdkp->max_ws_blocks, 0xffffffff); |
| 513 | break; |
| 514 | |
| 515 | case SD_LBP_WS10: |
| 516 | max_blocks = min_not_zero(sdkp->max_ws_blocks, (u32)0xffff); |
| 517 | break; |
| 518 | |
| 519 | case SD_LBP_ZERO: |
| 520 | max_blocks = min_not_zero(sdkp->max_ws_blocks, (u32)0xffff); |
| 521 | q->limits.discard_zeroes_data = 1; |
| 522 | break; |
| 523 | } |
| 524 | |
| 525 | q->limits.max_discard_sectors = max_blocks * (logical_block_size >> 9); |
| 526 | queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, q); |
| 527 | |
| 528 | sdkp->provisioning_mode = mode; |
| 529 | } |
| 530 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | /** |
Christoph Hellwig | 66ac028 | 2010-06-18 16:59:42 +0200 | [diff] [blame] | 532 | * scsi_setup_discard_cmnd - unmap blocks on thinly provisioned device |
| 533 | * @sdp: scsi device to operate one |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 534 | * @rq: Request to prepare |
| 535 | * |
| 536 | * Will issue either UNMAP or WRITE SAME(16) depending on preference |
| 537 | * indicated by target device. |
| 538 | **/ |
Christoph Hellwig | 66ac028 | 2010-06-18 16:59:42 +0200 | [diff] [blame] | 539 | static int scsi_setup_discard_cmnd(struct scsi_device *sdp, struct request *rq) |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 540 | { |
| 541 | struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); |
| 542 | struct bio *bio = rq->bio; |
| 543 | sector_t sector = bio->bi_sector; |
Christoph Hellwig | 66ac028 | 2010-06-18 16:59:42 +0200 | [diff] [blame] | 544 | unsigned int nr_sectors = bio_sectors(bio); |
| 545 | unsigned int len; |
FUJITA Tomonori | f1126e9 | 2010-07-01 19:49:18 +0900 | [diff] [blame] | 546 | int ret; |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 547 | char *buf; |
Christoph Hellwig | 66ac028 | 2010-06-18 16:59:42 +0200 | [diff] [blame] | 548 | struct page *page; |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 549 | |
| 550 | if (sdkp->device->sector_size == 4096) { |
| 551 | sector >>= 3; |
Christoph Hellwig | 66ac028 | 2010-06-18 16:59:42 +0200 | [diff] [blame] | 552 | nr_sectors >>= 3; |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 553 | } |
| 554 | |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 555 | rq->timeout = SD_TIMEOUT; |
| 556 | |
| 557 | memset(rq->cmd, 0, rq->cmd_len); |
| 558 | |
Christoph Hellwig | 66ac028 | 2010-06-18 16:59:42 +0200 | [diff] [blame] | 559 | page = alloc_page(GFP_ATOMIC | __GFP_ZERO); |
| 560 | if (!page) |
| 561 | return BLKPREP_DEFER; |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 562 | |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 563 | switch (sdkp->provisioning_mode) { |
| 564 | case SD_LBP_UNMAP: |
| 565 | buf = page_address(page); |
Christoph Hellwig | 66ac028 | 2010-06-18 16:59:42 +0200 | [diff] [blame] | 566 | |
| 567 | rq->cmd_len = 10; |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 568 | rq->cmd[0] = UNMAP; |
| 569 | rq->cmd[8] = 24; |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 570 | |
| 571 | put_unaligned_be16(6 + 16, &buf[0]); |
| 572 | put_unaligned_be16(16, &buf[2]); |
| 573 | put_unaligned_be64(sector, &buf[8]); |
Christoph Hellwig | 66ac028 | 2010-06-18 16:59:42 +0200 | [diff] [blame] | 574 | put_unaligned_be32(nr_sectors, &buf[16]); |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 575 | |
Christoph Hellwig | 66ac028 | 2010-06-18 16:59:42 +0200 | [diff] [blame] | 576 | len = 24; |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 577 | break; |
| 578 | |
| 579 | case SD_LBP_WS16: |
Christoph Hellwig | 66ac028 | 2010-06-18 16:59:42 +0200 | [diff] [blame] | 580 | rq->cmd_len = 16; |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 581 | rq->cmd[0] = WRITE_SAME_16; |
| 582 | rq->cmd[1] = 0x8; /* UNMAP */ |
| 583 | put_unaligned_be64(sector, &rq->cmd[2]); |
Christoph Hellwig | 66ac028 | 2010-06-18 16:59:42 +0200 | [diff] [blame] | 584 | put_unaligned_be32(nr_sectors, &rq->cmd[10]); |
| 585 | |
| 586 | len = sdkp->device->sector_size; |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 587 | break; |
| 588 | |
| 589 | case SD_LBP_WS10: |
| 590 | case SD_LBP_ZERO: |
| 591 | rq->cmd_len = 10; |
| 592 | rq->cmd[0] = WRITE_SAME; |
| 593 | if (sdkp->provisioning_mode == SD_LBP_WS10) |
| 594 | rq->cmd[1] = 0x8; /* UNMAP */ |
| 595 | put_unaligned_be32(sector, &rq->cmd[2]); |
| 596 | put_unaligned_be16(nr_sectors, &rq->cmd[7]); |
| 597 | |
| 598 | len = sdkp->device->sector_size; |
| 599 | break; |
| 600 | |
| 601 | default: |
Martin K. Petersen | 09b9cc4 | 2011-03-22 00:27:42 -0400 | [diff] [blame] | 602 | ret = BLKPREP_KILL; |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 603 | goto out; |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 604 | } |
| 605 | |
Christoph Hellwig | 66ac028 | 2010-06-18 16:59:42 +0200 | [diff] [blame] | 606 | blk_add_request_payload(rq, page, len); |
FUJITA Tomonori | f1126e9 | 2010-07-01 19:49:18 +0900 | [diff] [blame] | 607 | ret = scsi_setup_blk_pc_cmnd(sdp, rq); |
| 608 | rq->buffer = page_address(page); |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 609 | |
| 610 | out: |
FUJITA Tomonori | 610a634 | 2010-07-08 10:16:17 +0200 | [diff] [blame] | 611 | if (ret != BLKPREP_OK) { |
| 612 | __free_page(page); |
| 613 | rq->buffer = NULL; |
| 614 | } |
FUJITA Tomonori | f1126e9 | 2010-07-01 19:49:18 +0900 | [diff] [blame] | 615 | return ret; |
| 616 | } |
| 617 | |
FUJITA Tomonori | 90467c2 | 2010-07-03 17:45:34 +0900 | [diff] [blame] | 618 | static int scsi_setup_flush_cmnd(struct scsi_device *sdp, struct request *rq) |
| 619 | { |
Mike Christie | e3b3e62 | 2010-08-11 11:06:25 -0500 | [diff] [blame] | 620 | rq->timeout = SD_FLUSH_TIMEOUT; |
FUJITA Tomonori | 90467c2 | 2010-07-03 17:45:34 +0900 | [diff] [blame] | 621 | rq->retries = SD_MAX_RETRIES; |
| 622 | rq->cmd[0] = SYNCHRONIZE_CACHE; |
| 623 | rq->cmd_len = 10; |
| 624 | |
| 625 | return scsi_setup_blk_pc_cmnd(sdp, rq); |
| 626 | } |
| 627 | |
FUJITA Tomonori | f1126e9 | 2010-07-01 19:49:18 +0900 | [diff] [blame] | 628 | static void sd_unprep_fn(struct request_queue *q, struct request *rq) |
| 629 | { |
FUJITA Tomonori | 610a634 | 2010-07-08 10:16:17 +0200 | [diff] [blame] | 630 | if (rq->cmd_flags & REQ_DISCARD) { |
| 631 | free_page((unsigned long)rq->buffer); |
| 632 | rq->buffer = NULL; |
| 633 | } |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 634 | } |
| 635 | |
| 636 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 637 | * sd_init_command - build a scsi (read or write) command from |
| 638 | * information in the request structure. |
| 639 | * @SCpnt: pointer to mid-level's per scsi command structure that |
| 640 | * contains request and into which the scsi command is written |
| 641 | * |
| 642 | * Returns 1 if successful and 0 if error (or cannot be done now). |
| 643 | **/ |
James Bottomley | 7f9a6bc | 2007-08-04 10:06:25 -0500 | [diff] [blame] | 644 | static int sd_prep_fn(struct request_queue *q, struct request *rq) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | { |
James Bottomley | 7f9a6bc | 2007-08-04 10:06:25 -0500 | [diff] [blame] | 646 | struct scsi_cmnd *SCpnt; |
| 647 | struct scsi_device *sdp = q->queuedata; |
Christoph Hellwig | 776b23a | 2006-01-06 18:34:07 +0100 | [diff] [blame] | 648 | struct gendisk *disk = rq->rq_disk; |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 649 | struct scsi_disk *sdkp; |
Tejun Heo | 83096eb | 2009-05-07 22:24:39 +0900 | [diff] [blame] | 650 | sector_t block = blk_rq_pos(rq); |
Linus Torvalds | 1835107 | 2008-08-05 21:42:21 -0700 | [diff] [blame] | 651 | sector_t threshold; |
Tejun Heo | 83096eb | 2009-05-07 22:24:39 +0900 | [diff] [blame] | 652 | unsigned int this_count = blk_rq_sectors(rq); |
Martin K. Petersen | bd623e7 | 2008-09-19 18:47:19 -0400 | [diff] [blame] | 653 | int ret, host_dif; |
Martin K. Petersen | 4e7392e | 2009-09-20 16:49:38 -0400 | [diff] [blame] | 654 | unsigned char protect; |
James Bottomley | 7f9a6bc | 2007-08-04 10:06:25 -0500 | [diff] [blame] | 655 | |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 656 | /* |
| 657 | * Discard request come in as REQ_TYPE_FS but we turn them into |
| 658 | * block PC requests to make life easier. |
| 659 | */ |
Christoph Hellwig | 66ac028 | 2010-06-18 16:59:42 +0200 | [diff] [blame] | 660 | if (rq->cmd_flags & REQ_DISCARD) { |
| 661 | ret = scsi_setup_discard_cmnd(sdp, rq); |
| 662 | goto out; |
FUJITA Tomonori | 90467c2 | 2010-07-03 17:45:34 +0900 | [diff] [blame] | 663 | } else if (rq->cmd_flags & REQ_FLUSH) { |
| 664 | ret = scsi_setup_flush_cmnd(sdp, rq); |
| 665 | goto out; |
Christoph Hellwig | 66ac028 | 2010-06-18 16:59:42 +0200 | [diff] [blame] | 666 | } else if (rq->cmd_type == REQ_TYPE_BLOCK_PC) { |
James Bottomley | 7f9a6bc | 2007-08-04 10:06:25 -0500 | [diff] [blame] | 667 | ret = scsi_setup_blk_pc_cmnd(sdp, rq); |
| 668 | goto out; |
| 669 | } else if (rq->cmd_type != REQ_TYPE_FS) { |
| 670 | ret = BLKPREP_KILL; |
| 671 | goto out; |
| 672 | } |
| 673 | ret = scsi_setup_fs_cmnd(sdp, rq); |
| 674 | if (ret != BLKPREP_OK) |
| 675 | goto out; |
| 676 | SCpnt = rq->special; |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 677 | sdkp = scsi_disk(disk); |
James Bottomley | 7f9a6bc | 2007-08-04 10:06:25 -0500 | [diff] [blame] | 678 | |
| 679 | /* from here on until we're complete, any goto out |
| 680 | * is used for a killable error condition */ |
| 681 | ret = BLKPREP_KILL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | |
Martin K. Petersen | fa0d34b | 2007-02-27 22:41:19 -0500 | [diff] [blame] | 683 | SCSI_LOG_HLQUEUE(1, scmd_printk(KERN_INFO, SCpnt, |
| 684 | "sd_init_command: block=%llu, " |
| 685 | "count=%d\n", |
| 686 | (unsigned long long)block, |
| 687 | this_count)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 688 | |
| 689 | if (!sdp || !scsi_device_online(sdp) || |
Tejun Heo | 83096eb | 2009-05-07 22:24:39 +0900 | [diff] [blame] | 690 | block + blk_rq_sectors(rq) > get_capacity(disk)) { |
Martin K. Petersen | fa0d34b | 2007-02-27 22:41:19 -0500 | [diff] [blame] | 691 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
Tejun Heo | 83096eb | 2009-05-07 22:24:39 +0900 | [diff] [blame] | 692 | "Finishing %u sectors\n", |
| 693 | blk_rq_sectors(rq))); |
Martin K. Petersen | fa0d34b | 2007-02-27 22:41:19 -0500 | [diff] [blame] | 694 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
| 695 | "Retry with 0x%p\n", SCpnt)); |
James Bottomley | 7f9a6bc | 2007-08-04 10:06:25 -0500 | [diff] [blame] | 696 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 697 | } |
| 698 | |
| 699 | if (sdp->changed) { |
| 700 | /* |
| 701 | * quietly refuse to do anything to a changed disc until |
| 702 | * the changed bit has been reset |
| 703 | */ |
Alan Stern | 3ff5588 | 2010-09-07 11:44:01 -0400 | [diff] [blame] | 704 | /* printk("SCSI disk has been changed or is not present. Prohibiting further I/O.\n"); */ |
James Bottomley | 7f9a6bc | 2007-08-04 10:06:25 -0500 | [diff] [blame] | 705 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | } |
James Bottomley | 7f9a6bc | 2007-08-04 10:06:25 -0500 | [diff] [blame] | 707 | |
Hans de Goede | a0899d4 | 2008-01-20 11:12:26 +0100 | [diff] [blame] | 708 | /* |
Linus Torvalds | 1835107 | 2008-08-05 21:42:21 -0700 | [diff] [blame] | 709 | * Some SD card readers can't handle multi-sector accesses which touch |
| 710 | * the last one or two hardware sectors. Split accesses as needed. |
Hans de Goede | a0899d4 | 2008-01-20 11:12:26 +0100 | [diff] [blame] | 711 | */ |
Linus Torvalds | 1835107 | 2008-08-05 21:42:21 -0700 | [diff] [blame] | 712 | threshold = get_capacity(disk) - SD_LAST_BUGGY_SECTORS * |
| 713 | (sdp->sector_size / 512); |
| 714 | |
| 715 | if (unlikely(sdp->last_sector_bug && block + this_count > threshold)) { |
| 716 | if (block < threshold) { |
| 717 | /* Access up to the threshold but not beyond */ |
| 718 | this_count = threshold - block; |
| 719 | } else { |
| 720 | /* Access only a single hardware sector */ |
| 721 | this_count = sdp->sector_size / 512; |
| 722 | } |
| 723 | } |
Hans de Goede | a0899d4 | 2008-01-20 11:12:26 +0100 | [diff] [blame] | 724 | |
Martin K. Petersen | fa0d34b | 2007-02-27 22:41:19 -0500 | [diff] [blame] | 725 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, "block=%llu\n", |
| 726 | (unsigned long long)block)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | |
| 728 | /* |
| 729 | * If we have a 1K hardware sectorsize, prevent access to single |
| 730 | * 512 byte sectors. In theory we could handle this - in fact |
| 731 | * the scsi cdrom driver must be able to handle this because |
| 732 | * we typically use 1K blocksizes, and cdroms typically have |
| 733 | * 2K hardware sectorsizes. Of course, things are simpler |
| 734 | * with the cdrom, since it is read-only. For performance |
| 735 | * reasons, the filesystems should be able to handle this |
| 736 | * and not force the scsi disk driver to use bounce buffers |
| 737 | * for this. |
| 738 | */ |
| 739 | if (sdp->sector_size == 1024) { |
Tejun Heo | 83096eb | 2009-05-07 22:24:39 +0900 | [diff] [blame] | 740 | if ((block & 1) || (blk_rq_sectors(rq) & 1)) { |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 741 | scmd_printk(KERN_ERR, SCpnt, |
| 742 | "Bad block number requested\n"); |
James Bottomley | 7f9a6bc | 2007-08-04 10:06:25 -0500 | [diff] [blame] | 743 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 744 | } else { |
| 745 | block = block >> 1; |
| 746 | this_count = this_count >> 1; |
| 747 | } |
| 748 | } |
| 749 | if (sdp->sector_size == 2048) { |
Tejun Heo | 83096eb | 2009-05-07 22:24:39 +0900 | [diff] [blame] | 750 | if ((block & 3) || (blk_rq_sectors(rq) & 3)) { |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 751 | scmd_printk(KERN_ERR, SCpnt, |
| 752 | "Bad block number requested\n"); |
James Bottomley | 7f9a6bc | 2007-08-04 10:06:25 -0500 | [diff] [blame] | 753 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | } else { |
| 755 | block = block >> 2; |
| 756 | this_count = this_count >> 2; |
| 757 | } |
| 758 | } |
| 759 | if (sdp->sector_size == 4096) { |
Tejun Heo | 83096eb | 2009-05-07 22:24:39 +0900 | [diff] [blame] | 760 | if ((block & 7) || (blk_rq_sectors(rq) & 7)) { |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 761 | scmd_printk(KERN_ERR, SCpnt, |
| 762 | "Bad block number requested\n"); |
James Bottomley | 7f9a6bc | 2007-08-04 10:06:25 -0500 | [diff] [blame] | 763 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | } else { |
| 765 | block = block >> 3; |
| 766 | this_count = this_count >> 3; |
| 767 | } |
| 768 | } |
| 769 | if (rq_data_dir(rq) == WRITE) { |
| 770 | if (!sdp->writeable) { |
James Bottomley | 7f9a6bc | 2007-08-04 10:06:25 -0500 | [diff] [blame] | 771 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | } |
| 773 | SCpnt->cmnd[0] = WRITE_6; |
| 774 | SCpnt->sc_data_direction = DMA_TO_DEVICE; |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 775 | |
| 776 | if (blk_integrity_rq(rq) && |
| 777 | sd_dif_prepare(rq, block, sdp->sector_size) == -EIO) |
| 778 | goto out; |
| 779 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | } else if (rq_data_dir(rq) == READ) { |
| 781 | SCpnt->cmnd[0] = READ_6; |
| 782 | SCpnt->sc_data_direction = DMA_FROM_DEVICE; |
| 783 | } else { |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 784 | scmd_printk(KERN_ERR, SCpnt, "Unknown command %x\n", rq->cmd_flags); |
James Bottomley | 7f9a6bc | 2007-08-04 10:06:25 -0500 | [diff] [blame] | 785 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 786 | } |
| 787 | |
Martin K. Petersen | fa0d34b | 2007-02-27 22:41:19 -0500 | [diff] [blame] | 788 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
Tejun Heo | 83096eb | 2009-05-07 22:24:39 +0900 | [diff] [blame] | 789 | "%s %d/%u 512 byte blocks.\n", |
Martin K. Petersen | fa0d34b | 2007-02-27 22:41:19 -0500 | [diff] [blame] | 790 | (rq_data_dir(rq) == WRITE) ? |
| 791 | "writing" : "reading", this_count, |
Tejun Heo | 83096eb | 2009-05-07 22:24:39 +0900 | [diff] [blame] | 792 | blk_rq_sectors(rq))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 793 | |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 794 | /* Set RDPROTECT/WRPROTECT if disk is formatted with DIF */ |
Martin K. Petersen | bd623e7 | 2008-09-19 18:47:19 -0400 | [diff] [blame] | 795 | host_dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type); |
| 796 | if (host_dif) |
Martin K. Petersen | 4e7392e | 2009-09-20 16:49:38 -0400 | [diff] [blame] | 797 | protect = 1 << 5; |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 798 | else |
Martin K. Petersen | 4e7392e | 2009-09-20 16:49:38 -0400 | [diff] [blame] | 799 | protect = 0; |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 800 | |
Martin K. Petersen | 4e7392e | 2009-09-20 16:49:38 -0400 | [diff] [blame] | 801 | if (host_dif == SD_DIF_TYPE2_PROTECTION) { |
| 802 | SCpnt->cmnd = mempool_alloc(sd_cdb_pool, GFP_ATOMIC); |
| 803 | |
| 804 | if (unlikely(SCpnt->cmnd == NULL)) { |
| 805 | ret = BLKPREP_DEFER; |
| 806 | goto out; |
| 807 | } |
| 808 | |
| 809 | SCpnt->cmd_len = SD_EXT_CDB_SIZE; |
| 810 | memset(SCpnt->cmnd, 0, SCpnt->cmd_len); |
| 811 | SCpnt->cmnd[0] = VARIABLE_LENGTH_CMD; |
| 812 | SCpnt->cmnd[7] = 0x18; |
| 813 | SCpnt->cmnd[9] = (rq_data_dir(rq) == READ) ? READ_32 : WRITE_32; |
Christoph Hellwig | 33659eb | 2010-08-07 18:17:56 +0200 | [diff] [blame] | 814 | SCpnt->cmnd[10] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
Martin K. Petersen | 4e7392e | 2009-09-20 16:49:38 -0400 | [diff] [blame] | 815 | |
| 816 | /* LBA */ |
| 817 | SCpnt->cmnd[12] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0; |
| 818 | SCpnt->cmnd[13] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0; |
| 819 | SCpnt->cmnd[14] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0; |
| 820 | SCpnt->cmnd[15] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0; |
| 821 | SCpnt->cmnd[16] = (unsigned char) (block >> 24) & 0xff; |
| 822 | SCpnt->cmnd[17] = (unsigned char) (block >> 16) & 0xff; |
| 823 | SCpnt->cmnd[18] = (unsigned char) (block >> 8) & 0xff; |
| 824 | SCpnt->cmnd[19] = (unsigned char) block & 0xff; |
| 825 | |
| 826 | /* Expected Indirect LBA */ |
| 827 | SCpnt->cmnd[20] = (unsigned char) (block >> 24) & 0xff; |
| 828 | SCpnt->cmnd[21] = (unsigned char) (block >> 16) & 0xff; |
| 829 | SCpnt->cmnd[22] = (unsigned char) (block >> 8) & 0xff; |
| 830 | SCpnt->cmnd[23] = (unsigned char) block & 0xff; |
| 831 | |
| 832 | /* Transfer length */ |
| 833 | SCpnt->cmnd[28] = (unsigned char) (this_count >> 24) & 0xff; |
| 834 | SCpnt->cmnd[29] = (unsigned char) (this_count >> 16) & 0xff; |
| 835 | SCpnt->cmnd[30] = (unsigned char) (this_count >> 8) & 0xff; |
| 836 | SCpnt->cmnd[31] = (unsigned char) this_count & 0xff; |
| 837 | } else if (block > 0xffffffff) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | SCpnt->cmnd[0] += READ_16 - READ_6; |
Christoph Hellwig | 33659eb | 2010-08-07 18:17:56 +0200 | [diff] [blame] | 839 | SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 840 | SCpnt->cmnd[2] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0; |
| 841 | SCpnt->cmnd[3] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0; |
| 842 | SCpnt->cmnd[4] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0; |
| 843 | SCpnt->cmnd[5] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0; |
| 844 | SCpnt->cmnd[6] = (unsigned char) (block >> 24) & 0xff; |
| 845 | SCpnt->cmnd[7] = (unsigned char) (block >> 16) & 0xff; |
| 846 | SCpnt->cmnd[8] = (unsigned char) (block >> 8) & 0xff; |
| 847 | SCpnt->cmnd[9] = (unsigned char) block & 0xff; |
| 848 | SCpnt->cmnd[10] = (unsigned char) (this_count >> 24) & 0xff; |
| 849 | SCpnt->cmnd[11] = (unsigned char) (this_count >> 16) & 0xff; |
| 850 | SCpnt->cmnd[12] = (unsigned char) (this_count >> 8) & 0xff; |
| 851 | SCpnt->cmnd[13] = (unsigned char) this_count & 0xff; |
| 852 | SCpnt->cmnd[14] = SCpnt->cmnd[15] = 0; |
| 853 | } else if ((this_count > 0xff) || (block > 0x1fffff) || |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 854 | scsi_device_protection(SCpnt->device) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 855 | SCpnt->device->use_10_for_rw) { |
| 856 | if (this_count > 0xffff) |
| 857 | this_count = 0xffff; |
| 858 | |
| 859 | SCpnt->cmnd[0] += READ_10 - READ_6; |
Christoph Hellwig | 33659eb | 2010-08-07 18:17:56 +0200 | [diff] [blame] | 860 | SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 861 | SCpnt->cmnd[2] = (unsigned char) (block >> 24) & 0xff; |
| 862 | SCpnt->cmnd[3] = (unsigned char) (block >> 16) & 0xff; |
| 863 | SCpnt->cmnd[4] = (unsigned char) (block >> 8) & 0xff; |
| 864 | SCpnt->cmnd[5] = (unsigned char) block & 0xff; |
| 865 | SCpnt->cmnd[6] = SCpnt->cmnd[9] = 0; |
| 866 | SCpnt->cmnd[7] = (unsigned char) (this_count >> 8) & 0xff; |
| 867 | SCpnt->cmnd[8] = (unsigned char) this_count & 0xff; |
| 868 | } else { |
Christoph Hellwig | 33659eb | 2010-08-07 18:17:56 +0200 | [diff] [blame] | 869 | if (unlikely(rq->cmd_flags & REQ_FUA)) { |
Tejun Heo | 007365a | 2006-01-06 09:53:52 +0100 | [diff] [blame] | 870 | /* |
| 871 | * This happens only if this drive failed |
| 872 | * 10byte rw command with ILLEGAL_REQUEST |
| 873 | * during operation and thus turned off |
| 874 | * use_10_for_rw. |
| 875 | */ |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 876 | scmd_printk(KERN_ERR, SCpnt, |
| 877 | "FUA write on READ/WRITE(6) drive\n"); |
James Bottomley | 7f9a6bc | 2007-08-04 10:06:25 -0500 | [diff] [blame] | 878 | goto out; |
Tejun Heo | 007365a | 2006-01-06 09:53:52 +0100 | [diff] [blame] | 879 | } |
| 880 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 881 | SCpnt->cmnd[1] |= (unsigned char) ((block >> 16) & 0x1f); |
| 882 | SCpnt->cmnd[2] = (unsigned char) ((block >> 8) & 0xff); |
| 883 | SCpnt->cmnd[3] = (unsigned char) block & 0xff; |
| 884 | SCpnt->cmnd[4] = (unsigned char) this_count; |
| 885 | SCpnt->cmnd[5] = 0; |
| 886 | } |
Boaz Harrosh | 30b0c37 | 2007-12-13 13:47:40 +0200 | [diff] [blame] | 887 | SCpnt->sdb.length = this_count * sdp->sector_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 888 | |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 889 | /* If DIF or DIX is enabled, tell HBA how to handle request */ |
Martin K. Petersen | bd623e7 | 2008-09-19 18:47:19 -0400 | [diff] [blame] | 890 | if (host_dif || scsi_prot_sg_count(SCpnt)) |
Martin K. Petersen | 35e1a5d | 2009-09-18 17:33:00 -0400 | [diff] [blame] | 891 | sd_prot_op(SCpnt, host_dif); |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 892 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 893 | /* |
| 894 | * We shouldn't disconnect in the middle of a sector, so with a dumb |
| 895 | * host adapter, it's safe to assume that we can at least transfer |
| 896 | * this many bytes between each connect / disconnect. |
| 897 | */ |
| 898 | SCpnt->transfersize = sdp->sector_size; |
| 899 | SCpnt->underflow = this_count << 9; |
| 900 | SCpnt->allowed = SD_MAX_RETRIES; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 901 | |
| 902 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 903 | * This indicates that the command is ready from our end to be |
| 904 | * queued. |
| 905 | */ |
James Bottomley | 7f9a6bc | 2007-08-04 10:06:25 -0500 | [diff] [blame] | 906 | ret = BLKPREP_OK; |
| 907 | out: |
| 908 | return scsi_prep_return(q, rq, ret); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 909 | } |
| 910 | |
| 911 | /** |
| 912 | * sd_open - open a scsi disk device |
| 913 | * @inode: only i_rdev member may be used |
| 914 | * @filp: only f_mode and f_flags may be used |
| 915 | * |
| 916 | * Returns 0 if successful. Returns a negated errno value in case |
| 917 | * of error. |
| 918 | * |
| 919 | * Note: This can be called from a user context (e.g. fsck(1) ) |
| 920 | * or from within the kernel (e.g. as a result of a mount(1) ). |
| 921 | * In the latter case @inode and @filp carry an abridged amount |
| 922 | * of information as noted above. |
Arnd Bergmann | 409f349 | 2010-07-07 16:51:29 +0200 | [diff] [blame] | 923 | * |
| 924 | * Locking: called with bdev->bd_mutex held. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 925 | **/ |
Al Viro | 0338e29 | 2008-03-02 10:41:04 -0500 | [diff] [blame] | 926 | static int sd_open(struct block_device *bdev, fmode_t mode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 927 | { |
Al Viro | 0338e29 | 2008-03-02 10:41:04 -0500 | [diff] [blame] | 928 | struct scsi_disk *sdkp = scsi_disk_get(bdev->bd_disk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | struct scsi_device *sdev; |
| 930 | int retval; |
| 931 | |
Al Viro | 0338e29 | 2008-03-02 10:41:04 -0500 | [diff] [blame] | 932 | if (!sdkp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | return -ENXIO; |
| 934 | |
Martin K. Petersen | fa0d34b | 2007-02-27 22:41:19 -0500 | [diff] [blame] | 935 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_open\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 936 | |
| 937 | sdev = sdkp->device; |
| 938 | |
Alan Stern | 478a8a0 | 2010-06-16 14:52:17 -0400 | [diff] [blame] | 939 | retval = scsi_autopm_get_device(sdev); |
| 940 | if (retval) |
| 941 | goto error_autopm; |
| 942 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 943 | /* |
| 944 | * If the device is in error recovery, wait until it is done. |
| 945 | * If the device is offline, then disallow any access to it. |
| 946 | */ |
| 947 | retval = -ENXIO; |
| 948 | if (!scsi_block_when_processing_errors(sdev)) |
| 949 | goto error_out; |
| 950 | |
| 951 | if (sdev->removable || sdkp->write_prot) |
Al Viro | 0338e29 | 2008-03-02 10:41:04 -0500 | [diff] [blame] | 952 | check_disk_change(bdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | |
| 954 | /* |
| 955 | * If the drive is empty, just let the open fail. |
| 956 | */ |
| 957 | retval = -ENOMEDIUM; |
Al Viro | 0338e29 | 2008-03-02 10:41:04 -0500 | [diff] [blame] | 958 | if (sdev->removable && !sdkp->media_present && !(mode & FMODE_NDELAY)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 959 | goto error_out; |
| 960 | |
| 961 | /* |
| 962 | * If the device has the write protect tab set, have the open fail |
| 963 | * if the user expects to be able to write to the thing. |
| 964 | */ |
| 965 | retval = -EROFS; |
Al Viro | 0338e29 | 2008-03-02 10:41:04 -0500 | [diff] [blame] | 966 | if (sdkp->write_prot && (mode & FMODE_WRITE)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | goto error_out; |
| 968 | |
| 969 | /* |
| 970 | * It is possible that the disk changing stuff resulted in |
| 971 | * the device being taken offline. If this is the case, |
| 972 | * report this to the user, and don't pretend that the |
| 973 | * open actually succeeded. |
| 974 | */ |
| 975 | retval = -ENXIO; |
| 976 | if (!scsi_device_online(sdev)) |
| 977 | goto error_out; |
| 978 | |
Arnd Bergmann | 409f349 | 2010-07-07 16:51:29 +0200 | [diff] [blame] | 979 | if ((atomic_inc_return(&sdkp->openers) == 1) && sdev->removable) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 980 | if (scsi_block_when_processing_errors(sdev)) |
| 981 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT); |
| 982 | } |
| 983 | |
| 984 | return 0; |
| 985 | |
| 986 | error_out: |
Alan Stern | 478a8a0 | 2010-06-16 14:52:17 -0400 | [diff] [blame] | 987 | scsi_autopm_put_device(sdev); |
| 988 | error_autopm: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 989 | scsi_disk_put(sdkp); |
| 990 | return retval; |
| 991 | } |
| 992 | |
| 993 | /** |
| 994 | * sd_release - invoked when the (last) close(2) is called on this |
| 995 | * scsi disk. |
| 996 | * @inode: only i_rdev member may be used |
| 997 | * @filp: only f_mode and f_flags may be used |
| 998 | * |
| 999 | * Returns 0. |
| 1000 | * |
| 1001 | * Note: may block (uninterruptible) if error recovery is underway |
| 1002 | * on this disk. |
Arnd Bergmann | 409f349 | 2010-07-07 16:51:29 +0200 | [diff] [blame] | 1003 | * |
| 1004 | * Locking: called with bdev->bd_mutex held. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1005 | **/ |
Al Viro | 0338e29 | 2008-03-02 10:41:04 -0500 | [diff] [blame] | 1006 | static int sd_release(struct gendisk *disk, fmode_t mode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1007 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1008 | struct scsi_disk *sdkp = scsi_disk(disk); |
| 1009 | struct scsi_device *sdev = sdkp->device; |
| 1010 | |
James Bottomley | 56937f7 | 2007-03-11 12:25:33 -0500 | [diff] [blame] | 1011 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_release\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1012 | |
Alan Stern | 7e44331 | 2010-09-07 11:27:52 -0400 | [diff] [blame] | 1013 | if (atomic_dec_return(&sdkp->openers) == 0 && sdev->removable) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1014 | if (scsi_block_when_processing_errors(sdev)) |
| 1015 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW); |
| 1016 | } |
| 1017 | |
| 1018 | /* |
| 1019 | * XXX and what if there are packets in flight and this close() |
| 1020 | * XXX is followed by a "rmmod sd_mod"? |
| 1021 | */ |
Alan Stern | 478a8a0 | 2010-06-16 14:52:17 -0400 | [diff] [blame] | 1022 | |
| 1023 | scsi_autopm_put_device(sdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1024 | scsi_disk_put(sdkp); |
| 1025 | return 0; |
| 1026 | } |
| 1027 | |
Christoph Hellwig | a885c8c | 2006-01-08 01:02:50 -0800 | [diff] [blame] | 1028 | static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1029 | { |
| 1030 | struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk); |
| 1031 | struct scsi_device *sdp = sdkp->device; |
| 1032 | struct Scsi_Host *host = sdp->host; |
| 1033 | int diskinfo[4]; |
| 1034 | |
| 1035 | /* default to most commonly used values */ |
| 1036 | diskinfo[0] = 0x40; /* 1 << 6 */ |
| 1037 | diskinfo[1] = 0x20; /* 1 << 5 */ |
| 1038 | diskinfo[2] = sdkp->capacity >> 11; |
| 1039 | |
| 1040 | /* override with calculated, extended default, or driver values */ |
| 1041 | if (host->hostt->bios_param) |
| 1042 | host->hostt->bios_param(sdp, bdev, sdkp->capacity, diskinfo); |
| 1043 | else |
| 1044 | scsicam_bios_param(bdev, sdkp->capacity, diskinfo); |
| 1045 | |
Christoph Hellwig | a885c8c | 2006-01-08 01:02:50 -0800 | [diff] [blame] | 1046 | geo->heads = diskinfo[0]; |
| 1047 | geo->sectors = diskinfo[1]; |
| 1048 | geo->cylinders = diskinfo[2]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1049 | return 0; |
| 1050 | } |
| 1051 | |
| 1052 | /** |
| 1053 | * sd_ioctl - process an ioctl |
| 1054 | * @inode: only i_rdev/i_bdev members may be used |
| 1055 | * @filp: only f_mode and f_flags may be used |
| 1056 | * @cmd: ioctl command number |
| 1057 | * @arg: this is third argument given to ioctl(2) system call. |
| 1058 | * Often contains a pointer. |
| 1059 | * |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 1060 | * Returns 0 if successful (some ioctls return positive numbers on |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1061 | * success as well). Returns a negated errno value in case of error. |
| 1062 | * |
| 1063 | * Note: most ioctls are forward onto the block subsystem or further |
Robert P. J. Day | 3a4fa0a | 2007-10-19 23:10:43 +0200 | [diff] [blame] | 1064 | * down in the scsi subsystem. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1065 | **/ |
Al Viro | 0338e29 | 2008-03-02 10:41:04 -0500 | [diff] [blame] | 1066 | static int sd_ioctl(struct block_device *bdev, fmode_t mode, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | unsigned int cmd, unsigned long arg) |
| 1068 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1069 | struct gendisk *disk = bdev->bd_disk; |
Nao Nishijima | fe2d185 | 2011-08-25 18:04:14 +0900 | [diff] [blame] | 1070 | struct scsi_disk *sdkp = scsi_disk(disk); |
| 1071 | struct scsi_device *sdp = sdkp->device; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1072 | void __user *p = (void __user *)arg; |
| 1073 | int error; |
| 1074 | |
Nao Nishijima | fe2d185 | 2011-08-25 18:04:14 +0900 | [diff] [blame] | 1075 | SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO, sdkp, "sd_ioctl: disk=%s, " |
| 1076 | "cmd=0x%x\n", disk->disk_name, cmd)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1077 | |
| 1078 | /* |
| 1079 | * If we are in the middle of error recovery, don't let anyone |
| 1080 | * else try and use this device. Also, if error recovery fails, it |
| 1081 | * may try and take the device offline, in which case all further |
| 1082 | * access to the device is prohibited. |
| 1083 | */ |
Al Viro | 83ff6fe | 2008-03-02 08:15:49 -0500 | [diff] [blame] | 1084 | error = scsi_nonblockable_ioctl(sdp, cmd, p, |
Christoph Hellwig | fd4ce1a | 2008-11-05 14:58:42 +0100 | [diff] [blame] | 1085 | (mode & FMODE_NDELAY) != 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1086 | if (!scsi_block_when_processing_errors(sdp) || !error) |
Arnd Bergmann | 8a6cfeb | 2010-07-08 10:18:46 +0200 | [diff] [blame] | 1087 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1088 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1089 | /* |
| 1090 | * Send SCSI addressing ioctls directly to mid level, send other |
| 1091 | * ioctls to block level and then onto mid level if they can't be |
| 1092 | * resolved. |
| 1093 | */ |
| 1094 | switch (cmd) { |
| 1095 | case SCSI_IOCTL_GET_IDLUN: |
| 1096 | case SCSI_IOCTL_GET_BUS_NUMBER: |
Arnd Bergmann | 8a6cfeb | 2010-07-08 10:18:46 +0200 | [diff] [blame] | 1097 | error = scsi_ioctl(sdp, cmd, p); |
| 1098 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1099 | default: |
Al Viro | 0338e29 | 2008-03-02 10:41:04 -0500 | [diff] [blame] | 1100 | error = scsi_cmd_ioctl(disk->queue, disk, mode, cmd, p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1101 | if (error != -ENOTTY) |
Arnd Bergmann | 8a6cfeb | 2010-07-08 10:18:46 +0200 | [diff] [blame] | 1102 | break; |
| 1103 | error = scsi_ioctl(sdp, cmd, p); |
| 1104 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1105 | } |
Arnd Bergmann | 8a6cfeb | 2010-07-08 10:18:46 +0200 | [diff] [blame] | 1106 | out: |
Arnd Bergmann | 8a6cfeb | 2010-07-08 10:18:46 +0200 | [diff] [blame] | 1107 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1108 | } |
| 1109 | |
| 1110 | static void set_media_not_present(struct scsi_disk *sdkp) |
| 1111 | { |
Tejun Heo | 2bae009 | 2010-12-18 18:42:23 +0100 | [diff] [blame] | 1112 | if (sdkp->media_present) |
| 1113 | sdkp->device->changed = 1; |
| 1114 | |
| 1115 | if (sdkp->device->removable) { |
| 1116 | sdkp->media_present = 0; |
| 1117 | sdkp->capacity = 0; |
| 1118 | } |
| 1119 | } |
| 1120 | |
| 1121 | static int media_not_present(struct scsi_disk *sdkp, |
| 1122 | struct scsi_sense_hdr *sshdr) |
| 1123 | { |
| 1124 | if (!scsi_sense_valid(sshdr)) |
| 1125 | return 0; |
| 1126 | |
| 1127 | /* not invoked for commands that could return deferred errors */ |
| 1128 | switch (sshdr->sense_key) { |
| 1129 | case UNIT_ATTENTION: |
| 1130 | case NOT_READY: |
| 1131 | /* medium not present */ |
| 1132 | if (sshdr->asc == 0x3A) { |
| 1133 | set_media_not_present(sdkp); |
| 1134 | return 1; |
| 1135 | } |
| 1136 | } |
| 1137 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1138 | } |
| 1139 | |
| 1140 | /** |
Tejun Heo | 2bae009 | 2010-12-18 18:42:23 +0100 | [diff] [blame] | 1141 | * sd_check_events - check media events |
| 1142 | * @disk: kernel device descriptor |
| 1143 | * @clearing: disk events currently being cleared |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1144 | * |
Tejun Heo | 2bae009 | 2010-12-18 18:42:23 +0100 | [diff] [blame] | 1145 | * Returns mask of DISK_EVENT_*. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1146 | * |
| 1147 | * Note: this function is invoked from the block subsystem. |
| 1148 | **/ |
Tejun Heo | 2bae009 | 2010-12-18 18:42:23 +0100 | [diff] [blame] | 1149 | static unsigned int sd_check_events(struct gendisk *disk, unsigned int clearing) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1150 | { |
| 1151 | struct scsi_disk *sdkp = scsi_disk(disk); |
| 1152 | struct scsi_device *sdp = sdkp->device; |
James Bottomley | 001aac2 | 2007-12-02 19:10:40 +0200 | [diff] [blame] | 1153 | struct scsi_sense_hdr *sshdr = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1154 | int retval; |
| 1155 | |
Tejun Heo | 2bae009 | 2010-12-18 18:42:23 +0100 | [diff] [blame] | 1156 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_check_events\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1157 | |
| 1158 | /* |
| 1159 | * If the device is offline, don't send any commands - just pretend as |
| 1160 | * if the command failed. If the device ever comes back online, we |
| 1161 | * can deal with it then. It is only because of unrecoverable errors |
| 1162 | * that we would ever take a device offline in the first place. |
| 1163 | */ |
Kay Sievers | 285e967 | 2007-08-14 14:10:39 +0200 | [diff] [blame] | 1164 | if (!scsi_device_online(sdp)) { |
| 1165 | set_media_not_present(sdkp); |
Kay Sievers | 285e967 | 2007-08-14 14:10:39 +0200 | [diff] [blame] | 1166 | goto out; |
| 1167 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1168 | |
| 1169 | /* |
| 1170 | * Using TEST_UNIT_READY enables differentiation between drive with |
| 1171 | * no cartridge loaded - NOT READY, drive with changed cartridge - |
| 1172 | * UNIT ATTENTION, or with same cartridge - GOOD STATUS. |
| 1173 | * |
| 1174 | * Drives that auto spin down. eg iomega jaz 1G, will be started |
| 1175 | * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever |
| 1176 | * sd_revalidate() is called. |
| 1177 | */ |
| 1178 | retval = -ENODEV; |
Kay Sievers | 285e967 | 2007-08-14 14:10:39 +0200 | [diff] [blame] | 1179 | |
James Bottomley | 001aac2 | 2007-12-02 19:10:40 +0200 | [diff] [blame] | 1180 | if (scsi_block_when_processing_errors(sdp)) { |
| 1181 | sshdr = kzalloc(sizeof(*sshdr), GFP_KERNEL); |
| 1182 | retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, SD_MAX_RETRIES, |
| 1183 | sshdr); |
| 1184 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1185 | |
Tejun Heo | 2bae009 | 2010-12-18 18:42:23 +0100 | [diff] [blame] | 1186 | /* failed to execute TUR, assume media not present */ |
| 1187 | if (host_byte(retval)) { |
Kay Sievers | 285e967 | 2007-08-14 14:10:39 +0200 | [diff] [blame] | 1188 | set_media_not_present(sdkp); |
Kay Sievers | 285e967 | 2007-08-14 14:10:39 +0200 | [diff] [blame] | 1189 | goto out; |
| 1190 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1191 | |
Tejun Heo | 2bae009 | 2010-12-18 18:42:23 +0100 | [diff] [blame] | 1192 | if (media_not_present(sdkp, sshdr)) |
| 1193 | goto out; |
| 1194 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1195 | /* |
| 1196 | * For removable scsi disk we have to recognise the presence |
Tejun Heo | 2bae009 | 2010-12-18 18:42:23 +0100 | [diff] [blame] | 1197 | * of a disk in the drive. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1198 | */ |
Tejun Heo | 2bae009 | 2010-12-18 18:42:23 +0100 | [diff] [blame] | 1199 | if (!sdkp->media_present) |
| 1200 | sdp->changed = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1201 | sdkp->media_present = 1; |
Kay Sievers | 285e967 | 2007-08-14 14:10:39 +0200 | [diff] [blame] | 1202 | out: |
Alan Stern | 3ff5588 | 2010-09-07 11:44:01 -0400 | [diff] [blame] | 1203 | /* |
Tejun Heo | 2bae009 | 2010-12-18 18:42:23 +0100 | [diff] [blame] | 1204 | * sdp->changed is set under the following conditions: |
Alan Stern | 3ff5588 | 2010-09-07 11:44:01 -0400 | [diff] [blame] | 1205 | * |
Tejun Heo | 2bae009 | 2010-12-18 18:42:23 +0100 | [diff] [blame] | 1206 | * Medium present state has changed in either direction. |
| 1207 | * Device has indicated UNIT_ATTENTION. |
Alan Stern | 3ff5588 | 2010-09-07 11:44:01 -0400 | [diff] [blame] | 1208 | */ |
James Bottomley | 001aac2 | 2007-12-02 19:10:40 +0200 | [diff] [blame] | 1209 | kfree(sshdr); |
Tejun Heo | 2bae009 | 2010-12-18 18:42:23 +0100 | [diff] [blame] | 1210 | retval = sdp->changed ? DISK_EVENT_MEDIA_CHANGE : 0; |
| 1211 | sdp->changed = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1212 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1213 | } |
| 1214 | |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 1215 | static int sd_sync_cache(struct scsi_disk *sdkp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1216 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1217 | int retries, res; |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 1218 | struct scsi_device *sdp = sdkp->device; |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 1219 | struct scsi_sense_hdr sshdr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1220 | |
| 1221 | if (!scsi_device_online(sdp)) |
| 1222 | return -ENODEV; |
| 1223 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1224 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1225 | for (retries = 3; retries > 0; --retries) { |
| 1226 | unsigned char cmd[10] = { 0 }; |
| 1227 | |
| 1228 | cmd[0] = SYNCHRONIZE_CACHE; |
| 1229 | /* |
| 1230 | * Leave the rest of the command zero to indicate |
| 1231 | * flush everything. |
| 1232 | */ |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 1233 | res = scsi_execute_req(sdp, cmd, DMA_NONE, NULL, 0, &sshdr, |
Mike Christie | e3b3e62 | 2010-08-11 11:06:25 -0500 | [diff] [blame] | 1234 | SD_FLUSH_TIMEOUT, SD_MAX_RETRIES, NULL); |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 1235 | if (res == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1236 | break; |
| 1237 | } |
| 1238 | |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 1239 | if (res) { |
| 1240 | sd_print_result(sdkp, res); |
| 1241 | if (driver_byte(res) & DRIVER_SENSE) |
| 1242 | sd_print_sense_hdr(sdkp, &sshdr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1243 | } |
| 1244 | |
Tejun Heo | 3721050 | 2007-03-21 00:07:18 +0900 | [diff] [blame] | 1245 | if (res) |
| 1246 | return -EIO; |
| 1247 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1248 | } |
| 1249 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1250 | static void sd_rescan(struct device *dev) |
| 1251 | { |
Alan Stern | 39b7f1e | 2005-11-04 14:44:41 -0500 | [diff] [blame] | 1252 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
| 1253 | |
| 1254 | if (sdkp) { |
Andrew Patterson | f98a8ca | 2008-09-04 14:27:35 -0600 | [diff] [blame] | 1255 | revalidate_disk(sdkp->disk); |
Alan Stern | 39b7f1e | 2005-11-04 14:44:41 -0500 | [diff] [blame] | 1256 | scsi_disk_put(sdkp); |
| 1257 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1258 | } |
| 1259 | |
| 1260 | |
| 1261 | #ifdef CONFIG_COMPAT |
| 1262 | /* |
| 1263 | * This gets directly called from VFS. When the ioctl |
| 1264 | * is not recognized we go back to the other translation paths. |
| 1265 | */ |
Al Viro | 0338e29 | 2008-03-02 10:41:04 -0500 | [diff] [blame] | 1266 | static int sd_compat_ioctl(struct block_device *bdev, fmode_t mode, |
| 1267 | unsigned int cmd, unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1268 | { |
Al Viro | 0338e29 | 2008-03-02 10:41:04 -0500 | [diff] [blame] | 1269 | struct scsi_device *sdev = scsi_disk(bdev->bd_disk)->device; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1270 | |
| 1271 | /* |
| 1272 | * If we are in the middle of error recovery, don't let anyone |
| 1273 | * else try and use this device. Also, if error recovery fails, it |
| 1274 | * may try and take the device offline, in which case all further |
| 1275 | * access to the device is prohibited. |
| 1276 | */ |
| 1277 | if (!scsi_block_when_processing_errors(sdev)) |
| 1278 | return -ENODEV; |
| 1279 | |
| 1280 | if (sdev->host->hostt->compat_ioctl) { |
| 1281 | int ret; |
| 1282 | |
| 1283 | ret = sdev->host->hostt->compat_ioctl(sdev, cmd, (void __user *)arg); |
| 1284 | |
| 1285 | return ret; |
| 1286 | } |
| 1287 | |
| 1288 | /* |
| 1289 | * Let the static ioctl translation table take care of it. |
| 1290 | */ |
| 1291 | return -ENOIOCTLCMD; |
| 1292 | } |
| 1293 | #endif |
| 1294 | |
Alexey Dobriyan | 83d5cde | 2009-09-21 17:01:13 -0700 | [diff] [blame] | 1295 | static const struct block_device_operations sd_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1296 | .owner = THIS_MODULE, |
Al Viro | 0338e29 | 2008-03-02 10:41:04 -0500 | [diff] [blame] | 1297 | .open = sd_open, |
| 1298 | .release = sd_release, |
Arnd Bergmann | 8a6cfeb | 2010-07-08 10:18:46 +0200 | [diff] [blame] | 1299 | .ioctl = sd_ioctl, |
Christoph Hellwig | a885c8c | 2006-01-08 01:02:50 -0800 | [diff] [blame] | 1300 | .getgeo = sd_getgeo, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1301 | #ifdef CONFIG_COMPAT |
Al Viro | 0338e29 | 2008-03-02 10:41:04 -0500 | [diff] [blame] | 1302 | .compat_ioctl = sd_compat_ioctl, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1303 | #endif |
Tejun Heo | 2bae009 | 2010-12-18 18:42:23 +0100 | [diff] [blame] | 1304 | .check_events = sd_check_events, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1305 | .revalidate_disk = sd_revalidate_disk, |
Tejun Heo | 72ec24b | 2010-05-15 20:09:32 +0200 | [diff] [blame] | 1306 | .unlock_native_capacity = sd_unlock_native_capacity, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1307 | }; |
| 1308 | |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 1309 | static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd) |
| 1310 | { |
Tejun Heo | 83096eb | 2009-05-07 22:24:39 +0900 | [diff] [blame] | 1311 | u64 start_lba = blk_rq_pos(scmd->request); |
| 1312 | u64 end_lba = blk_rq_pos(scmd->request) + (scsi_bufflen(scmd) / 512); |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 1313 | u64 bad_lba; |
| 1314 | int info_valid; |
James Bottomley | a8733c7 | 2010-12-17 15:36:34 -0500 | [diff] [blame] | 1315 | /* |
| 1316 | * resid is optional but mostly filled in. When it's unused, |
| 1317 | * its value is zero, so we assume the whole buffer transferred |
| 1318 | */ |
| 1319 | unsigned int transferred = scsi_bufflen(scmd) - scsi_get_resid(scmd); |
| 1320 | unsigned int good_bytes; |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 1321 | |
Christoph Hellwig | 33659eb | 2010-08-07 18:17:56 +0200 | [diff] [blame] | 1322 | if (scmd->request->cmd_type != REQ_TYPE_FS) |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 1323 | return 0; |
| 1324 | |
| 1325 | info_valid = scsi_get_sense_info_fld(scmd->sense_buffer, |
| 1326 | SCSI_SENSE_BUFFERSIZE, |
| 1327 | &bad_lba); |
| 1328 | if (!info_valid) |
| 1329 | return 0; |
| 1330 | |
| 1331 | if (scsi_bufflen(scmd) <= scmd->device->sector_size) |
| 1332 | return 0; |
| 1333 | |
| 1334 | if (scmd->device->sector_size < 512) { |
| 1335 | /* only legitimate sector_size here is 256 */ |
| 1336 | start_lba <<= 1; |
| 1337 | end_lba <<= 1; |
| 1338 | } else { |
| 1339 | /* be careful ... don't want any overflows */ |
| 1340 | u64 factor = scmd->device->sector_size / 512; |
| 1341 | do_div(start_lba, factor); |
| 1342 | do_div(end_lba, factor); |
| 1343 | } |
| 1344 | |
| 1345 | /* The bad lba was reported incorrectly, we have no idea where |
| 1346 | * the error is. |
| 1347 | */ |
| 1348 | if (bad_lba < start_lba || bad_lba >= end_lba) |
| 1349 | return 0; |
| 1350 | |
| 1351 | /* This computation should always be done in terms of |
| 1352 | * the resolution of the device's medium. |
| 1353 | */ |
James Bottomley | a8733c7 | 2010-12-17 15:36:34 -0500 | [diff] [blame] | 1354 | good_bytes = (bad_lba - start_lba) * scmd->device->sector_size; |
| 1355 | return min(good_bytes, transferred); |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 1356 | } |
| 1357 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1358 | /** |
Linus Torvalds | 7b3d954 | 2008-01-06 10:17:12 -0800 | [diff] [blame] | 1359 | * sd_done - bottom half handler: called when the lower level |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1360 | * driver has completed (successfully or otherwise) a scsi command. |
| 1361 | * @SCpnt: mid-level's per command structure. |
| 1362 | * |
| 1363 | * Note: potentially run from within an ISR. Must not block. |
| 1364 | **/ |
Linus Torvalds | 7b3d954 | 2008-01-06 10:17:12 -0800 | [diff] [blame] | 1365 | static int sd_done(struct scsi_cmnd *SCpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1366 | { |
| 1367 | int result = SCpnt->result; |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 1368 | unsigned int good_bytes = result ? 0 : scsi_bufflen(SCpnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1369 | struct scsi_sense_hdr sshdr; |
Martin K. Petersen | 4e7392e | 2009-09-20 16:49:38 -0400 | [diff] [blame] | 1370 | struct scsi_disk *sdkp = scsi_disk(SCpnt->request->rq_disk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1371 | int sense_valid = 0; |
| 1372 | int sense_deferred = 0; |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 1373 | unsigned char op = SCpnt->cmnd[0]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1374 | |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 1375 | if ((SCpnt->request->cmd_flags & REQ_DISCARD) && !result) |
| 1376 | scsi_set_resid(SCpnt, 0); |
FUJITA Tomonori | 6a32a8a | 2010-07-21 10:29:37 +0900 | [diff] [blame] | 1377 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1378 | if (result) { |
| 1379 | sense_valid = scsi_command_normalize_sense(SCpnt, &sshdr); |
| 1380 | if (sense_valid) |
| 1381 | sense_deferred = scsi_sense_is_deferred(&sshdr); |
| 1382 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1383 | #ifdef CONFIG_SCSI_LOGGING |
Martin K. Petersen | fa0d34b | 2007-02-27 22:41:19 -0500 | [diff] [blame] | 1384 | SCSI_LOG_HLCOMPLETE(1, scsi_print_result(SCpnt)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1385 | if (sense_valid) { |
Martin K. Petersen | fa0d34b | 2007-02-27 22:41:19 -0500 | [diff] [blame] | 1386 | SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO, SCpnt, |
Linus Torvalds | 7b3d954 | 2008-01-06 10:17:12 -0800 | [diff] [blame] | 1387 | "sd_done: sb[respc,sk,asc," |
Martin K. Petersen | fa0d34b | 2007-02-27 22:41:19 -0500 | [diff] [blame] | 1388 | "ascq]=%x,%x,%x,%x\n", |
| 1389 | sshdr.response_code, |
| 1390 | sshdr.sense_key, sshdr.asc, |
| 1391 | sshdr.ascq)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1392 | } |
| 1393 | #endif |
Luben Tuikov | 03aba2f | 2006-06-23 09:39:09 -0700 | [diff] [blame] | 1394 | if (driver_byte(result) != DRIVER_SENSE && |
| 1395 | (!sense_valid || sense_deferred)) |
| 1396 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1397 | |
Luben Tuikov | 03aba2f | 2006-06-23 09:39:09 -0700 | [diff] [blame] | 1398 | switch (sshdr.sense_key) { |
| 1399 | case HARDWARE_ERROR: |
| 1400 | case MEDIUM_ERROR: |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 1401 | good_bytes = sd_completed_bytes(SCpnt); |
Luben Tuikov | 03aba2f | 2006-06-23 09:39:09 -0700 | [diff] [blame] | 1402 | break; |
| 1403 | case RECOVERED_ERROR: |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 1404 | good_bytes = scsi_bufflen(SCpnt); |
| 1405 | break; |
Jamie Wellnitz | 10dab22 | 2008-09-11 21:39:36 -0400 | [diff] [blame] | 1406 | case NO_SENSE: |
| 1407 | /* This indicates a false check condition, so ignore it. An |
| 1408 | * unknown amount of data was transferred so treat it as an |
| 1409 | * error. |
| 1410 | */ |
| 1411 | scsi_print_sense("sd", SCpnt); |
| 1412 | SCpnt->result = 0; |
| 1413 | memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); |
| 1414 | break; |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 1415 | case ABORTED_COMMAND: |
| 1416 | if (sshdr.asc == 0x10) /* DIF: Target detected corruption */ |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 1417 | good_bytes = sd_completed_bytes(SCpnt); |
Luben Tuikov | 03aba2f | 2006-06-23 09:39:09 -0700 | [diff] [blame] | 1418 | break; |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 1419 | case ILLEGAL_REQUEST: |
| 1420 | if (sshdr.asc == 0x10) /* DIX: Host detected corruption */ |
| 1421 | good_bytes = sd_completed_bytes(SCpnt); |
| 1422 | /* INVALID COMMAND OPCODE or INVALID FIELD IN CDB */ |
| 1423 | if ((sshdr.asc == 0x20 || sshdr.asc == 0x24) && |
| 1424 | (op == UNMAP || op == WRITE_SAME_16 || op == WRITE_SAME)) |
| 1425 | sd_config_discard(sdkp, SD_LBP_DISABLE); |
| 1426 | break; |
Luben Tuikov | 03aba2f | 2006-06-23 09:39:09 -0700 | [diff] [blame] | 1427 | default: |
| 1428 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1429 | } |
Luben Tuikov | 03aba2f | 2006-06-23 09:39:09 -0700 | [diff] [blame] | 1430 | out: |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 1431 | if (rq_data_dir(SCpnt->request) == READ && scsi_prot_sg_count(SCpnt)) |
| 1432 | sd_dif_complete(SCpnt, good_bytes); |
| 1433 | |
Martin K. Petersen | 4e7392e | 2009-09-20 16:49:38 -0400 | [diff] [blame] | 1434 | if (scsi_host_dif_capable(sdkp->device->host, sdkp->protection_type) |
Martin K. Petersen | 77c9cfc | 2010-01-20 02:20:43 -0500 | [diff] [blame] | 1435 | == SD_DIF_TYPE2_PROTECTION && SCpnt->cmnd != SCpnt->request->cmd) { |
| 1436 | |
| 1437 | /* We have to print a failed command here as the |
| 1438 | * extended CDB gets freed before scsi_io_completion() |
| 1439 | * is called. |
| 1440 | */ |
| 1441 | if (result) |
| 1442 | scsi_print_command(SCpnt); |
| 1443 | |
Martin K. Petersen | 4e7392e | 2009-09-20 16:49:38 -0400 | [diff] [blame] | 1444 | mempool_free(SCpnt->cmnd, sd_cdb_pool); |
Martin K. Petersen | 77c9cfc | 2010-01-20 02:20:43 -0500 | [diff] [blame] | 1445 | SCpnt->cmnd = NULL; |
| 1446 | SCpnt->cmd_len = 0; |
| 1447 | } |
Martin K. Petersen | 4e7392e | 2009-09-20 16:49:38 -0400 | [diff] [blame] | 1448 | |
Linus Torvalds | 7b3d954 | 2008-01-06 10:17:12 -0800 | [diff] [blame] | 1449 | return good_bytes; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1450 | } |
| 1451 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1452 | /* |
| 1453 | * spinup disk - called only in sd_revalidate_disk() |
| 1454 | */ |
| 1455 | static void |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 1456 | sd_spinup_disk(struct scsi_disk *sdkp) |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 1457 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1458 | unsigned char cmd[10]; |
Alan Stern | 4451e47 | 2005-07-12 10:45:17 -0400 | [diff] [blame] | 1459 | unsigned long spintime_expire = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1460 | int retries, spintime; |
| 1461 | unsigned int the_result; |
| 1462 | struct scsi_sense_hdr sshdr; |
| 1463 | int sense_valid = 0; |
| 1464 | |
| 1465 | spintime = 0; |
| 1466 | |
| 1467 | /* Spin up drives, as required. Only do this at boot time */ |
| 1468 | /* Spinup needs to be done for module loads too. */ |
| 1469 | do { |
| 1470 | retries = 0; |
| 1471 | |
| 1472 | do { |
| 1473 | cmd[0] = TEST_UNIT_READY; |
| 1474 | memset((void *) &cmd[1], 0, 9); |
| 1475 | |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 1476 | the_result = scsi_execute_req(sdkp->device, cmd, |
| 1477 | DMA_NONE, NULL, 0, |
| 1478 | &sshdr, SD_TIMEOUT, |
FUJITA Tomonori | f4f4e47 | 2008-12-04 14:24:39 +0900 | [diff] [blame] | 1479 | SD_MAX_RETRIES, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1480 | |
Alan Stern | b4d38e3 | 2006-10-11 16:48:28 -0400 | [diff] [blame] | 1481 | /* |
| 1482 | * If the drive has indicated to us that it |
| 1483 | * doesn't have any media in it, don't bother |
| 1484 | * with any more polling. |
| 1485 | */ |
| 1486 | if (media_not_present(sdkp, &sshdr)) |
| 1487 | return; |
| 1488 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1489 | if (the_result) |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 1490 | sense_valid = scsi_sense_valid(&sshdr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1491 | retries++; |
| 1492 | } while (retries < 3 && |
| 1493 | (!scsi_status_is_good(the_result) || |
| 1494 | ((driver_byte(the_result) & DRIVER_SENSE) && |
| 1495 | sense_valid && sshdr.sense_key == UNIT_ATTENTION))); |
| 1496 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1497 | if ((driver_byte(the_result) & DRIVER_SENSE) == 0) { |
| 1498 | /* no sense, TUR either succeeded or failed |
| 1499 | * with a status error */ |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 1500 | if(!spintime && !scsi_status_is_good(the_result)) { |
| 1501 | sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n"); |
| 1502 | sd_print_result(sdkp, the_result); |
| 1503 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1504 | break; |
| 1505 | } |
| 1506 | |
| 1507 | /* |
| 1508 | * The device does not want the automatic start to be issued. |
| 1509 | */ |
Matthew Wilcox | 33dd6f9 | 2009-02-20 06:53:48 -0700 | [diff] [blame] | 1510 | if (sdkp->device->no_start_on_add) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1511 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1512 | |
Matthew Wilcox | 33dd6f9 | 2009-02-20 06:53:48 -0700 | [diff] [blame] | 1513 | if (sense_valid && sshdr.sense_key == NOT_READY) { |
| 1514 | if (sshdr.asc == 4 && sshdr.ascq == 3) |
| 1515 | break; /* manual intervention required */ |
| 1516 | if (sshdr.asc == 4 && sshdr.ascq == 0xb) |
| 1517 | break; /* standby */ |
| 1518 | if (sshdr.asc == 4 && sshdr.ascq == 0xc) |
| 1519 | break; /* unavailable */ |
| 1520 | /* |
| 1521 | * Issue command to spin up drive when not ready |
| 1522 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1523 | if (!spintime) { |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 1524 | sd_printk(KERN_NOTICE, sdkp, "Spinning up disk..."); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1525 | cmd[0] = START_STOP; |
| 1526 | cmd[1] = 1; /* Return immediately */ |
| 1527 | memset((void *) &cmd[2], 0, 8); |
| 1528 | cmd[4] = 1; /* Start spin cycle */ |
Stefan Richter | d2886ea | 2008-05-11 00:34:07 +0200 | [diff] [blame] | 1529 | if (sdkp->device->start_stop_pwr_cond) |
| 1530 | cmd[4] |= 1 << 4; |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 1531 | scsi_execute_req(sdkp->device, cmd, DMA_NONE, |
| 1532 | NULL, 0, &sshdr, |
FUJITA Tomonori | f4f4e47 | 2008-12-04 14:24:39 +0900 | [diff] [blame] | 1533 | SD_TIMEOUT, SD_MAX_RETRIES, |
| 1534 | NULL); |
Alan Stern | 4451e47 | 2005-07-12 10:45:17 -0400 | [diff] [blame] | 1535 | spintime_expire = jiffies + 100 * HZ; |
| 1536 | spintime = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1537 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1538 | /* Wait 1 second for next try */ |
| 1539 | msleep(1000); |
| 1540 | printk("."); |
Alan Stern | 4451e47 | 2005-07-12 10:45:17 -0400 | [diff] [blame] | 1541 | |
| 1542 | /* |
| 1543 | * Wait for USB flash devices with slow firmware. |
| 1544 | * Yes, this sense key/ASC combination shouldn't |
| 1545 | * occur here. It's characteristic of these devices. |
| 1546 | */ |
| 1547 | } else if (sense_valid && |
| 1548 | sshdr.sense_key == UNIT_ATTENTION && |
| 1549 | sshdr.asc == 0x28) { |
| 1550 | if (!spintime) { |
| 1551 | spintime_expire = jiffies + 5 * HZ; |
| 1552 | spintime = 1; |
| 1553 | } |
| 1554 | /* Wait 1 second for next try */ |
| 1555 | msleep(1000); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1556 | } else { |
| 1557 | /* we don't understand the sense code, so it's |
| 1558 | * probably pointless to loop */ |
| 1559 | if(!spintime) { |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 1560 | sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n"); |
| 1561 | sd_print_sense_hdr(sdkp, &sshdr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1562 | } |
| 1563 | break; |
| 1564 | } |
| 1565 | |
Alan Stern | 4451e47 | 2005-07-12 10:45:17 -0400 | [diff] [blame] | 1566 | } while (spintime && time_before_eq(jiffies, spintime_expire)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1567 | |
| 1568 | if (spintime) { |
| 1569 | if (scsi_status_is_good(the_result)) |
| 1570 | printk("ready\n"); |
| 1571 | else |
| 1572 | printk("not responding...\n"); |
| 1573 | } |
| 1574 | } |
| 1575 | |
Martin K. Petersen | e0597d7 | 2008-07-17 04:28:34 -0400 | [diff] [blame] | 1576 | |
| 1577 | /* |
| 1578 | * Determine whether disk supports Data Integrity Field. |
| 1579 | */ |
H Hartley Sweeten | 439d77f | 2010-08-10 18:01:20 -0700 | [diff] [blame] | 1580 | static void sd_read_protection_type(struct scsi_disk *sdkp, unsigned char *buffer) |
Martin K. Petersen | e0597d7 | 2008-07-17 04:28:34 -0400 | [diff] [blame] | 1581 | { |
| 1582 | struct scsi_device *sdp = sdkp->device; |
| 1583 | u8 type; |
| 1584 | |
| 1585 | if (scsi_device_protection(sdp) == 0 || (buffer[12] & 1) == 0) |
Martin K. Petersen | 35e1a5d | 2009-09-18 17:33:00 -0400 | [diff] [blame] | 1586 | return; |
| 1587 | |
| 1588 | type = ((buffer[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */ |
| 1589 | |
| 1590 | if (type == sdkp->protection_type || !sdkp->first_scan) |
| 1591 | return; |
Martin K. Petersen | e0597d7 | 2008-07-17 04:28:34 -0400 | [diff] [blame] | 1592 | |
Martin K. Petersen | be922f4 | 2008-09-19 18:47:20 -0400 | [diff] [blame] | 1593 | sdkp->protection_type = type; |
| 1594 | |
Martin K. Petersen | 4e7392e | 2009-09-20 16:49:38 -0400 | [diff] [blame] | 1595 | if (type > SD_DIF_TYPE3_PROTECTION) { |
Martin K. Petersen | 35e1a5d | 2009-09-18 17:33:00 -0400 | [diff] [blame] | 1596 | sd_printk(KERN_ERR, sdkp, "formatted with unsupported " \ |
| 1597 | "protection type %u. Disabling disk!\n", type); |
| 1598 | sdkp->capacity = 0; |
| 1599 | return; |
Martin K. Petersen | e0597d7 | 2008-07-17 04:28:34 -0400 | [diff] [blame] | 1600 | } |
| 1601 | |
Martin K. Petersen | 35e1a5d | 2009-09-18 17:33:00 -0400 | [diff] [blame] | 1602 | if (scsi_host_dif_capable(sdp->host, type)) |
| 1603 | sd_printk(KERN_NOTICE, sdkp, |
| 1604 | "Enabling DIF Type %u protection\n", type); |
| 1605 | else |
| 1606 | sd_printk(KERN_NOTICE, sdkp, |
| 1607 | "Disabling DIF Type %u protection\n", type); |
Martin K. Petersen | e0597d7 | 2008-07-17 04:28:34 -0400 | [diff] [blame] | 1608 | } |
| 1609 | |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 1610 | static void read_capacity_error(struct scsi_disk *sdkp, struct scsi_device *sdp, |
| 1611 | struct scsi_sense_hdr *sshdr, int sense_valid, |
| 1612 | int the_result) |
| 1613 | { |
| 1614 | sd_print_result(sdkp, the_result); |
| 1615 | if (driver_byte(the_result) & DRIVER_SENSE) |
| 1616 | sd_print_sense_hdr(sdkp, sshdr); |
| 1617 | else |
| 1618 | sd_printk(KERN_NOTICE, sdkp, "Sense not available.\n"); |
| 1619 | |
| 1620 | /* |
| 1621 | * Set dirty bit for removable devices if not ready - |
| 1622 | * sometimes drives will not report this properly. |
| 1623 | */ |
| 1624 | if (sdp->removable && |
| 1625 | sense_valid && sshdr->sense_key == NOT_READY) |
Tejun Heo | 2bae009 | 2010-12-18 18:42:23 +0100 | [diff] [blame] | 1626 | set_media_not_present(sdkp); |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 1627 | |
| 1628 | /* |
| 1629 | * We used to set media_present to 0 here to indicate no media |
| 1630 | * in the drive, but some drives fail read capacity even with |
| 1631 | * media present, so we can't do that. |
| 1632 | */ |
| 1633 | sdkp->capacity = 0; /* unknown mapped to zero - as usual */ |
| 1634 | } |
| 1635 | |
| 1636 | #define RC16_LEN 32 |
| 1637 | #if RC16_LEN > SD_BUF_SIZE |
| 1638 | #error RC16_LEN must not be more than SD_BUF_SIZE |
| 1639 | #endif |
| 1640 | |
James Bottomley | 3233ac1 | 2010-04-01 10:30:01 -0400 | [diff] [blame] | 1641 | #define READ_CAPACITY_RETRIES_ON_RESET 10 |
| 1642 | |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 1643 | static int read_capacity_16(struct scsi_disk *sdkp, struct scsi_device *sdp, |
| 1644 | unsigned char *buffer) |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 1645 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1646 | unsigned char cmd[16]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1647 | struct scsi_sense_hdr sshdr; |
| 1648 | int sense_valid = 0; |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 1649 | int the_result; |
James Bottomley | 3233ac1 | 2010-04-01 10:30:01 -0400 | [diff] [blame] | 1650 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
Martin K. Petersen | ea09bcc | 2009-05-23 11:43:37 -0400 | [diff] [blame] | 1651 | unsigned int alignment; |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 1652 | unsigned long long lba; |
| 1653 | unsigned sector_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1654 | |
Hans de Goede | 5ce524b | 2010-10-01 14:20:10 -0700 | [diff] [blame] | 1655 | if (sdp->no_read_capacity_16) |
| 1656 | return -EINVAL; |
| 1657 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1658 | do { |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 1659 | memset(cmd, 0, 16); |
| 1660 | cmd[0] = SERVICE_ACTION_IN; |
| 1661 | cmd[1] = SAI_READ_CAPACITY_16; |
| 1662 | cmd[13] = RC16_LEN; |
| 1663 | memset(buffer, 0, RC16_LEN); |
| 1664 | |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 1665 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 1666 | buffer, RC16_LEN, &sshdr, |
| 1667 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1668 | |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 1669 | if (media_not_present(sdkp, &sshdr)) |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 1670 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1671 | |
Matthew Wilcox | 2b30130 | 2009-03-12 14:20:30 -0400 | [diff] [blame] | 1672 | if (the_result) { |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 1673 | sense_valid = scsi_sense_valid(&sshdr); |
Matthew Wilcox | 2b30130 | 2009-03-12 14:20:30 -0400 | [diff] [blame] | 1674 | if (sense_valid && |
| 1675 | sshdr.sense_key == ILLEGAL_REQUEST && |
| 1676 | (sshdr.asc == 0x20 || sshdr.asc == 0x24) && |
| 1677 | sshdr.ascq == 0x00) |
| 1678 | /* Invalid Command Operation Code or |
| 1679 | * Invalid Field in CDB, just retry |
| 1680 | * silently with RC10 */ |
| 1681 | return -EINVAL; |
James Bottomley | 3233ac1 | 2010-04-01 10:30:01 -0400 | [diff] [blame] | 1682 | if (sense_valid && |
| 1683 | sshdr.sense_key == UNIT_ATTENTION && |
| 1684 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) |
| 1685 | /* Device reset might occur several times, |
| 1686 | * give it one more chance */ |
| 1687 | if (--reset_retries > 0) |
| 1688 | continue; |
Matthew Wilcox | 2b30130 | 2009-03-12 14:20:30 -0400 | [diff] [blame] | 1689 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1690 | retries--; |
| 1691 | |
| 1692 | } while (the_result && retries); |
| 1693 | |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 1694 | if (the_result) { |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 1695 | sd_printk(KERN_NOTICE, sdkp, "READ CAPACITY(16) failed\n"); |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 1696 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); |
| 1697 | return -EINVAL; |
| 1698 | } |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 1699 | |
Dave Hansen | 8f76d15 | 2009-04-21 16:43:27 -0700 | [diff] [blame] | 1700 | sector_size = get_unaligned_be32(&buffer[8]); |
| 1701 | lba = get_unaligned_be64(&buffer[0]); |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 1702 | |
| 1703 | sd_read_protection_type(sdkp, buffer); |
| 1704 | |
| 1705 | if ((sizeof(sdkp->capacity) == 4) && (lba >= 0xffffffffULL)) { |
| 1706 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a " |
| 1707 | "kernel compiled with support for large block " |
| 1708 | "devices.\n"); |
| 1709 | sdkp->capacity = 0; |
| 1710 | return -EOVERFLOW; |
| 1711 | } |
| 1712 | |
Martin K. Petersen | ea09bcc | 2009-05-23 11:43:37 -0400 | [diff] [blame] | 1713 | /* Logical blocks per physical block exponent */ |
Martin K. Petersen | 526f7c7 | 2010-09-28 14:48:47 -0400 | [diff] [blame] | 1714 | sdkp->physical_block_size = (1 << (buffer[13] & 0xf)) * sector_size; |
Martin K. Petersen | ea09bcc | 2009-05-23 11:43:37 -0400 | [diff] [blame] | 1715 | |
| 1716 | /* Lowest aligned logical block */ |
| 1717 | alignment = ((buffer[14] & 0x3f) << 8 | buffer[15]) * sector_size; |
| 1718 | blk_queue_alignment_offset(sdp->request_queue, alignment); |
| 1719 | if (alignment && sdkp->first_scan) |
| 1720 | sd_printk(KERN_NOTICE, sdkp, |
| 1721 | "physical block alignment offset: %u\n", alignment); |
| 1722 | |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 1723 | if (buffer[14] & 0x80) { /* LBPME */ |
| 1724 | sdkp->lbpme = 1; |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 1725 | |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 1726 | if (buffer[14] & 0x40) /* LBPRZ */ |
| 1727 | sdkp->lbprz = 1; |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 1728 | |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 1729 | sd_config_discard(sdkp, SD_LBP_WS16); |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 1730 | } |
| 1731 | |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 1732 | sdkp->capacity = lba + 1; |
| 1733 | return sector_size; |
| 1734 | } |
| 1735 | |
| 1736 | static int read_capacity_10(struct scsi_disk *sdkp, struct scsi_device *sdp, |
| 1737 | unsigned char *buffer) |
| 1738 | { |
| 1739 | unsigned char cmd[16]; |
| 1740 | struct scsi_sense_hdr sshdr; |
| 1741 | int sense_valid = 0; |
| 1742 | int the_result; |
James Bottomley | 3233ac1 | 2010-04-01 10:30:01 -0400 | [diff] [blame] | 1743 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 1744 | sector_t lba; |
| 1745 | unsigned sector_size; |
| 1746 | |
| 1747 | do { |
| 1748 | cmd[0] = READ_CAPACITY; |
| 1749 | memset(&cmd[1], 0, 9); |
| 1750 | memset(buffer, 0, 8); |
| 1751 | |
| 1752 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, |
| 1753 | buffer, 8, &sshdr, |
| 1754 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); |
| 1755 | |
| 1756 | if (media_not_present(sdkp, &sshdr)) |
| 1757 | return -ENODEV; |
| 1758 | |
James Bottomley | 3233ac1 | 2010-04-01 10:30:01 -0400 | [diff] [blame] | 1759 | if (the_result) { |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 1760 | sense_valid = scsi_sense_valid(&sshdr); |
James Bottomley | 3233ac1 | 2010-04-01 10:30:01 -0400 | [diff] [blame] | 1761 | if (sense_valid && |
| 1762 | sshdr.sense_key == UNIT_ATTENTION && |
| 1763 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) |
| 1764 | /* Device reset might occur several times, |
| 1765 | * give it one more chance */ |
| 1766 | if (--reset_retries > 0) |
| 1767 | continue; |
| 1768 | } |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 1769 | retries--; |
| 1770 | |
| 1771 | } while (the_result && retries); |
| 1772 | |
| 1773 | if (the_result) { |
| 1774 | sd_printk(KERN_NOTICE, sdkp, "READ CAPACITY failed\n"); |
| 1775 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); |
| 1776 | return -EINVAL; |
| 1777 | } |
| 1778 | |
Dave Hansen | 8f76d15 | 2009-04-21 16:43:27 -0700 | [diff] [blame] | 1779 | sector_size = get_unaligned_be32(&buffer[4]); |
| 1780 | lba = get_unaligned_be32(&buffer[0]); |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 1781 | |
Hans de Goede | 5ce524b | 2010-10-01 14:20:10 -0700 | [diff] [blame] | 1782 | if (sdp->no_read_capacity_16 && (lba == 0xffffffff)) { |
| 1783 | /* Some buggy (usb cardreader) devices return an lba of |
| 1784 | 0xffffffff when the want to report a size of 0 (with |
| 1785 | which they really mean no media is present) */ |
| 1786 | sdkp->capacity = 0; |
Linus Torvalds | 5cc1035 | 2010-10-22 20:30:48 -0700 | [diff] [blame] | 1787 | sdkp->physical_block_size = sector_size; |
Hans de Goede | 5ce524b | 2010-10-01 14:20:10 -0700 | [diff] [blame] | 1788 | return sector_size; |
| 1789 | } |
| 1790 | |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 1791 | if ((sizeof(sdkp->capacity) == 4) && (lba == 0xffffffff)) { |
| 1792 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a " |
| 1793 | "kernel compiled with support for large block " |
| 1794 | "devices.\n"); |
| 1795 | sdkp->capacity = 0; |
| 1796 | return -EOVERFLOW; |
| 1797 | } |
| 1798 | |
| 1799 | sdkp->capacity = lba + 1; |
Martin K. Petersen | 526f7c7 | 2010-09-28 14:48:47 -0400 | [diff] [blame] | 1800 | sdkp->physical_block_size = sector_size; |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 1801 | return sector_size; |
| 1802 | } |
| 1803 | |
Matthew Wilcox | 2b30130 | 2009-03-12 14:20:30 -0400 | [diff] [blame] | 1804 | static int sd_try_rc16_first(struct scsi_device *sdp) |
| 1805 | { |
Hannes Reinecke | f87146b | 2010-03-29 09:29:24 +0200 | [diff] [blame] | 1806 | if (sdp->host->max_cmd_len < 16) |
| 1807 | return 0; |
Matthew Wilcox | 2b30130 | 2009-03-12 14:20:30 -0400 | [diff] [blame] | 1808 | if (sdp->scsi_level > SCSI_SPC_2) |
| 1809 | return 1; |
| 1810 | if (scsi_device_protection(sdp)) |
| 1811 | return 1; |
| 1812 | return 0; |
| 1813 | } |
| 1814 | |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 1815 | /* |
| 1816 | * read disk capacity |
| 1817 | */ |
| 1818 | static void |
| 1819 | sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer) |
| 1820 | { |
| 1821 | int sector_size; |
| 1822 | struct scsi_device *sdp = sdkp->device; |
Martin K. Petersen | 70a9b87 | 2009-03-09 11:33:31 -0400 | [diff] [blame] | 1823 | sector_t old_capacity = sdkp->capacity; |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 1824 | |
Matthew Wilcox | 2b30130 | 2009-03-12 14:20:30 -0400 | [diff] [blame] | 1825 | if (sd_try_rc16_first(sdp)) { |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 1826 | sector_size = read_capacity_16(sdkp, sdp, buffer); |
| 1827 | if (sector_size == -EOVERFLOW) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1828 | goto got_data; |
Matthew Wilcox | 2b30130 | 2009-03-12 14:20:30 -0400 | [diff] [blame] | 1829 | if (sector_size == -ENODEV) |
| 1830 | return; |
| 1831 | if (sector_size < 0) |
| 1832 | sector_size = read_capacity_10(sdkp, sdp, buffer); |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 1833 | if (sector_size < 0) |
| 1834 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1835 | } else { |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 1836 | sector_size = read_capacity_10(sdkp, sdp, buffer); |
| 1837 | if (sector_size == -EOVERFLOW) |
| 1838 | goto got_data; |
| 1839 | if (sector_size < 0) |
| 1840 | return; |
| 1841 | if ((sizeof(sdkp->capacity) > 4) && |
| 1842 | (sdkp->capacity > 0xffffffffULL)) { |
| 1843 | int old_sector_size = sector_size; |
| 1844 | sd_printk(KERN_NOTICE, sdkp, "Very big device. " |
| 1845 | "Trying to use READ CAPACITY(16).\n"); |
| 1846 | sector_size = read_capacity_16(sdkp, sdp, buffer); |
| 1847 | if (sector_size < 0) { |
| 1848 | sd_printk(KERN_NOTICE, sdkp, |
| 1849 | "Using 0xffffffff as device size\n"); |
| 1850 | sdkp->capacity = 1 + (sector_t) 0xffffffff; |
| 1851 | sector_size = old_sector_size; |
| 1852 | goto got_data; |
| 1853 | } |
| 1854 | } |
| 1855 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1856 | |
Alan Stern | 5c211ca | 2009-02-18 10:54:44 -0500 | [diff] [blame] | 1857 | /* Some devices are known to return the total number of blocks, |
| 1858 | * not the highest block number. Some devices have versions |
| 1859 | * which do this and others which do not. Some devices we might |
| 1860 | * suspect of doing this but we don't know for certain. |
| 1861 | * |
| 1862 | * If we know the reported capacity is wrong, decrement it. If |
| 1863 | * we can only guess, then assume the number of blocks is even |
| 1864 | * (usually true but not always) and err on the side of lowering |
| 1865 | * the capacity. |
| 1866 | */ |
| 1867 | if (sdp->fix_capacity || |
| 1868 | (sdp->guess_capacity && (sdkp->capacity & 0x01))) { |
| 1869 | sd_printk(KERN_INFO, sdkp, "Adjusting the sector count " |
| 1870 | "from its reported value: %llu\n", |
| 1871 | (unsigned long long) sdkp->capacity); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1872 | --sdkp->capacity; |
Oliver Neukum | 61bf54b | 2007-02-08 09:04:48 +0100 | [diff] [blame] | 1873 | } |
| 1874 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1875 | got_data: |
| 1876 | if (sector_size == 0) { |
| 1877 | sector_size = 512; |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 1878 | sd_printk(KERN_NOTICE, sdkp, "Sector size 0 reported, " |
| 1879 | "assuming 512.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1880 | } |
| 1881 | |
| 1882 | if (sector_size != 512 && |
| 1883 | sector_size != 1024 && |
| 1884 | sector_size != 2048 && |
| 1885 | sector_size != 4096 && |
| 1886 | sector_size != 256) { |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 1887 | sd_printk(KERN_NOTICE, sdkp, "Unsupported sector size %d.\n", |
| 1888 | sector_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1889 | /* |
| 1890 | * The user might want to re-format the drive with |
| 1891 | * a supported sectorsize. Once this happens, it |
| 1892 | * would be relatively trivial to set the thing up. |
| 1893 | * For this reason, we leave the thing in the table. |
| 1894 | */ |
| 1895 | sdkp->capacity = 0; |
| 1896 | /* |
| 1897 | * set a bogus sector size so the normal read/write |
| 1898 | * logic in the block layer will eventually refuse any |
| 1899 | * request on this device without tripping over power |
| 1900 | * of two sector size assumptions |
| 1901 | */ |
| 1902 | sector_size = 512; |
| 1903 | } |
Martin K. Petersen | e1defc4 | 2009-05-22 17:17:49 -0400 | [diff] [blame] | 1904 | blk_queue_logical_block_size(sdp->request_queue, sector_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1905 | |
James Bottomley | 7404ad3b | 2008-08-31 10:41:52 -0500 | [diff] [blame] | 1906 | { |
| 1907 | char cap_str_2[10], cap_str_10[10]; |
H. Peter Anvin | 520a2c2 | 2008-10-14 11:34:20 -0700 | [diff] [blame] | 1908 | u64 sz = (u64)sdkp->capacity << ilog2(sector_size); |
James Bottomley | 7404ad3b | 2008-08-31 10:41:52 -0500 | [diff] [blame] | 1909 | |
| 1910 | string_get_size(sz, STRING_UNITS_2, cap_str_2, |
| 1911 | sizeof(cap_str_2)); |
| 1912 | string_get_size(sz, STRING_UNITS_10, cap_str_10, |
| 1913 | sizeof(cap_str_10)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1914 | |
Martin K. Petersen | ea09bcc | 2009-05-23 11:43:37 -0400 | [diff] [blame] | 1915 | if (sdkp->first_scan || old_capacity != sdkp->capacity) { |
Martin K. Petersen | 70a9b87 | 2009-03-09 11:33:31 -0400 | [diff] [blame] | 1916 | sd_printk(KERN_NOTICE, sdkp, |
Martin K. Petersen | ea09bcc | 2009-05-23 11:43:37 -0400 | [diff] [blame] | 1917 | "%llu %d-byte logical blocks: (%s/%s)\n", |
Martin K. Petersen | 70a9b87 | 2009-03-09 11:33:31 -0400 | [diff] [blame] | 1918 | (unsigned long long)sdkp->capacity, |
| 1919 | sector_size, cap_str_10, cap_str_2); |
Martin K. Petersen | ea09bcc | 2009-05-23 11:43:37 -0400 | [diff] [blame] | 1920 | |
Martin K. Petersen | 526f7c7 | 2010-09-28 14:48:47 -0400 | [diff] [blame] | 1921 | if (sdkp->physical_block_size != sector_size) |
Martin K. Petersen | ea09bcc | 2009-05-23 11:43:37 -0400 | [diff] [blame] | 1922 | sd_printk(KERN_NOTICE, sdkp, |
| 1923 | "%u-byte physical blocks\n", |
Martin K. Petersen | 526f7c7 | 2010-09-28 14:48:47 -0400 | [diff] [blame] | 1924 | sdkp->physical_block_size); |
Martin K. Petersen | ea09bcc | 2009-05-23 11:43:37 -0400 | [diff] [blame] | 1925 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1926 | } |
| 1927 | |
| 1928 | /* Rescale capacity to 512-byte units */ |
| 1929 | if (sector_size == 4096) |
| 1930 | sdkp->capacity <<= 3; |
| 1931 | else if (sector_size == 2048) |
| 1932 | sdkp->capacity <<= 2; |
| 1933 | else if (sector_size == 1024) |
| 1934 | sdkp->capacity <<= 1; |
| 1935 | else if (sector_size == 256) |
| 1936 | sdkp->capacity >>= 1; |
| 1937 | |
Martin K. Petersen | 526f7c7 | 2010-09-28 14:48:47 -0400 | [diff] [blame] | 1938 | blk_queue_physical_block_size(sdp->request_queue, |
| 1939 | sdkp->physical_block_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1940 | sdkp->device->sector_size = sector_size; |
| 1941 | } |
| 1942 | |
| 1943 | /* called with buffer of length 512 */ |
| 1944 | static inline int |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 1945 | sd_do_mode_sense(struct scsi_device *sdp, int dbd, int modepage, |
| 1946 | unsigned char *buffer, int len, struct scsi_mode_data *data, |
| 1947 | struct scsi_sense_hdr *sshdr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1948 | { |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 1949 | return scsi_mode_sense(sdp, dbd, modepage, buffer, len, |
James Bottomley | 1cf7269 | 2005-08-28 11:27:01 -0500 | [diff] [blame] | 1950 | SD_TIMEOUT, SD_MAX_RETRIES, data, |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 1951 | sshdr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1952 | } |
| 1953 | |
| 1954 | /* |
| 1955 | * read write protect setting, if possible - called only in sd_revalidate_disk() |
Al Viro | 4897080 | 2006-02-26 08:34:10 -0600 | [diff] [blame] | 1956 | * called with buffer of length SD_BUF_SIZE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1957 | */ |
| 1958 | static void |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 1959 | sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer) |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 1960 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1961 | int res; |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 1962 | struct scsi_device *sdp = sdkp->device; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1963 | struct scsi_mode_data data; |
Martin K. Petersen | 70a9b87 | 2009-03-09 11:33:31 -0400 | [diff] [blame] | 1964 | int old_wp = sdkp->write_prot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1965 | |
| 1966 | set_disk_ro(sdkp->disk, 0); |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 1967 | if (sdp->skip_ms_page_3f) { |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 1968 | sd_printk(KERN_NOTICE, sdkp, "Assuming Write Enabled\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1969 | return; |
| 1970 | } |
| 1971 | |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 1972 | if (sdp->use_192_bytes_for_3f) { |
| 1973 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 192, &data, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1974 | } else { |
| 1975 | /* |
| 1976 | * First attempt: ask for all pages (0x3F), but only 4 bytes. |
| 1977 | * We have to start carefully: some devices hang if we ask |
| 1978 | * for more than is available. |
| 1979 | */ |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 1980 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 4, &data, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1981 | |
| 1982 | /* |
| 1983 | * Second attempt: ask for page 0 When only page 0 is |
| 1984 | * implemented, a request for page 3F may return Sense Key |
| 1985 | * 5: Illegal Request, Sense Code 24: Invalid field in |
| 1986 | * CDB. |
| 1987 | */ |
| 1988 | if (!scsi_status_is_good(res)) |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 1989 | res = sd_do_mode_sense(sdp, 0, 0, buffer, 4, &data, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1990 | |
| 1991 | /* |
| 1992 | * Third attempt: ask 255 bytes, as we did earlier. |
| 1993 | */ |
| 1994 | if (!scsi_status_is_good(res)) |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 1995 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 255, |
| 1996 | &data, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1997 | } |
| 1998 | |
| 1999 | if (!scsi_status_is_good(res)) { |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 2000 | sd_printk(KERN_WARNING, sdkp, |
| 2001 | "Test WP failed, assume Write Enabled\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2002 | } else { |
| 2003 | sdkp->write_prot = ((data.device_specific & 0x80) != 0); |
| 2004 | set_disk_ro(sdkp->disk, sdkp->write_prot); |
Martin K. Petersen | 70a9b87 | 2009-03-09 11:33:31 -0400 | [diff] [blame] | 2005 | if (sdkp->first_scan || old_wp != sdkp->write_prot) { |
| 2006 | sd_printk(KERN_NOTICE, sdkp, "Write Protect is %s\n", |
| 2007 | sdkp->write_prot ? "on" : "off"); |
| 2008 | sd_printk(KERN_DEBUG, sdkp, |
| 2009 | "Mode Sense: %02x %02x %02x %02x\n", |
| 2010 | buffer[0], buffer[1], buffer[2], buffer[3]); |
| 2011 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2012 | } |
| 2013 | } |
| 2014 | |
| 2015 | /* |
| 2016 | * sd_read_cache_type - called only from sd_revalidate_disk() |
Al Viro | 4897080 | 2006-02-26 08:34:10 -0600 | [diff] [blame] | 2017 | * called with buffer of length SD_BUF_SIZE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2018 | */ |
| 2019 | static void |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 2020 | sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer) |
Al Viro | 631e8a1 | 2005-05-16 01:59:55 +0100 | [diff] [blame] | 2021 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2022 | int len = 0, res; |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 2023 | struct scsi_device *sdp = sdkp->device; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2024 | |
Al Viro | 631e8a1 | 2005-05-16 01:59:55 +0100 | [diff] [blame] | 2025 | int dbd; |
| 2026 | int modepage; |
Luben Tuikov | 0bcaa11 | 2011-05-19 00:00:58 -0700 | [diff] [blame] | 2027 | int first_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2028 | struct scsi_mode_data data; |
| 2029 | struct scsi_sense_hdr sshdr; |
Martin K. Petersen | 70a9b87 | 2009-03-09 11:33:31 -0400 | [diff] [blame] | 2030 | int old_wce = sdkp->WCE; |
| 2031 | int old_rcd = sdkp->RCD; |
| 2032 | int old_dpofua = sdkp->DPOFUA; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2033 | |
Luben Tuikov | 0bcaa11 | 2011-05-19 00:00:58 -0700 | [diff] [blame] | 2034 | first_len = 4; |
| 2035 | if (sdp->skip_ms_page_8) { |
| 2036 | if (sdp->type == TYPE_RBC) |
| 2037 | goto defaults; |
| 2038 | else { |
| 2039 | if (sdp->skip_ms_page_3f) |
| 2040 | goto defaults; |
| 2041 | modepage = 0x3F; |
| 2042 | if (sdp->use_192_bytes_for_3f) |
| 2043 | first_len = 192; |
| 2044 | dbd = 0; |
| 2045 | } |
| 2046 | } else if (sdp->type == TYPE_RBC) { |
Al Viro | 631e8a1 | 2005-05-16 01:59:55 +0100 | [diff] [blame] | 2047 | modepage = 6; |
| 2048 | dbd = 8; |
| 2049 | } else { |
| 2050 | modepage = 8; |
| 2051 | dbd = 0; |
| 2052 | } |
| 2053 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2054 | /* cautiously ask */ |
Luben Tuikov | 0bcaa11 | 2011-05-19 00:00:58 -0700 | [diff] [blame] | 2055 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, first_len, |
| 2056 | &data, &sshdr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2057 | |
| 2058 | if (!scsi_status_is_good(res)) |
| 2059 | goto bad_sense; |
| 2060 | |
Al Viro | 6d73c85 | 2006-02-23 02:03:16 +0100 | [diff] [blame] | 2061 | if (!data.header_length) { |
| 2062 | modepage = 6; |
Luben Tuikov | 0bcaa11 | 2011-05-19 00:00:58 -0700 | [diff] [blame] | 2063 | first_len = 0; |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 2064 | sd_printk(KERN_ERR, sdkp, "Missing header in MODE_SENSE response\n"); |
Al Viro | 6d73c85 | 2006-02-23 02:03:16 +0100 | [diff] [blame] | 2065 | } |
| 2066 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2067 | /* that went OK, now ask for the proper length */ |
| 2068 | len = data.length; |
| 2069 | |
| 2070 | /* |
| 2071 | * We're only interested in the first three bytes, actually. |
| 2072 | * But the data cache page is defined for the first 20. |
| 2073 | */ |
| 2074 | if (len < 3) |
| 2075 | goto bad_sense; |
Luben Tuikov | 0bcaa11 | 2011-05-19 00:00:58 -0700 | [diff] [blame] | 2076 | else if (len > SD_BUF_SIZE) { |
| 2077 | sd_printk(KERN_NOTICE, sdkp, "Truncating mode parameter " |
| 2078 | "data from %d to %d bytes\n", len, SD_BUF_SIZE); |
| 2079 | len = SD_BUF_SIZE; |
| 2080 | } |
| 2081 | if (modepage == 0x3F && sdp->use_192_bytes_for_3f) |
| 2082 | len = 192; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2083 | |
| 2084 | /* Get the data */ |
Luben Tuikov | 0bcaa11 | 2011-05-19 00:00:58 -0700 | [diff] [blame] | 2085 | if (len > first_len) |
| 2086 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, len, |
| 2087 | &data, &sshdr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2088 | |
| 2089 | if (scsi_status_is_good(res)) { |
Al Viro | 631e8a1 | 2005-05-16 01:59:55 +0100 | [diff] [blame] | 2090 | int offset = data.header_length + data.block_descriptor_length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2091 | |
Luben Tuikov | 0bcaa11 | 2011-05-19 00:00:58 -0700 | [diff] [blame] | 2092 | while (offset < len) { |
| 2093 | u8 page_code = buffer[offset] & 0x3F; |
| 2094 | u8 spf = buffer[offset] & 0x40; |
| 2095 | |
| 2096 | if (page_code == 8 || page_code == 6) { |
| 2097 | /* We're interested only in the first 3 bytes. |
| 2098 | */ |
| 2099 | if (len - offset <= 2) { |
| 2100 | sd_printk(KERN_ERR, sdkp, "Incomplete " |
| 2101 | "mode parameter data\n"); |
| 2102 | goto defaults; |
| 2103 | } else { |
| 2104 | modepage = page_code; |
| 2105 | goto Page_found; |
| 2106 | } |
| 2107 | } else { |
| 2108 | /* Go to the next page */ |
| 2109 | if (spf && len - offset > 3) |
| 2110 | offset += 4 + (buffer[offset+2] << 8) + |
| 2111 | buffer[offset+3]; |
| 2112 | else if (!spf && len - offset > 1) |
| 2113 | offset += 2 + buffer[offset+1]; |
| 2114 | else { |
| 2115 | sd_printk(KERN_ERR, sdkp, "Incomplete " |
| 2116 | "mode parameter data\n"); |
| 2117 | goto defaults; |
| 2118 | } |
| 2119 | } |
Al Viro | 4897080 | 2006-02-26 08:34:10 -0600 | [diff] [blame] | 2120 | } |
| 2121 | |
Luben Tuikov | 0bcaa11 | 2011-05-19 00:00:58 -0700 | [diff] [blame] | 2122 | if (modepage == 0x3F) { |
| 2123 | sd_printk(KERN_ERR, sdkp, "No Caching mode page " |
| 2124 | "present\n"); |
| 2125 | goto defaults; |
| 2126 | } else if ((buffer[offset] & 0x3f) != modepage) { |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 2127 | sd_printk(KERN_ERR, sdkp, "Got wrong page\n"); |
Al Viro | 631e8a1 | 2005-05-16 01:59:55 +0100 | [diff] [blame] | 2128 | goto defaults; |
| 2129 | } |
Luben Tuikov | 0bcaa11 | 2011-05-19 00:00:58 -0700 | [diff] [blame] | 2130 | Page_found: |
Al Viro | 631e8a1 | 2005-05-16 01:59:55 +0100 | [diff] [blame] | 2131 | if (modepage == 8) { |
| 2132 | sdkp->WCE = ((buffer[offset + 2] & 0x04) != 0); |
| 2133 | sdkp->RCD = ((buffer[offset + 2] & 0x01) != 0); |
| 2134 | } else { |
| 2135 | sdkp->WCE = ((buffer[offset + 2] & 0x01) == 0); |
| 2136 | sdkp->RCD = 0; |
| 2137 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2138 | |
Tejun Heo | 007365a | 2006-01-06 09:53:52 +0100 | [diff] [blame] | 2139 | sdkp->DPOFUA = (data.device_specific & 0x10) != 0; |
| 2140 | if (sdkp->DPOFUA && !sdkp->device->use_10_for_rw) { |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 2141 | sd_printk(KERN_NOTICE, sdkp, |
| 2142 | "Uses READ/WRITE(6), disabling FUA\n"); |
Tejun Heo | 007365a | 2006-01-06 09:53:52 +0100 | [diff] [blame] | 2143 | sdkp->DPOFUA = 0; |
| 2144 | } |
| 2145 | |
Martin K. Petersen | 70a9b87 | 2009-03-09 11:33:31 -0400 | [diff] [blame] | 2146 | if (sdkp->first_scan || old_wce != sdkp->WCE || |
| 2147 | old_rcd != sdkp->RCD || old_dpofua != sdkp->DPOFUA) |
| 2148 | sd_printk(KERN_NOTICE, sdkp, |
| 2149 | "Write cache: %s, read cache: %s, %s\n", |
| 2150 | sdkp->WCE ? "enabled" : "disabled", |
| 2151 | sdkp->RCD ? "disabled" : "enabled", |
| 2152 | sdkp->DPOFUA ? "supports DPO and FUA" |
| 2153 | : "doesn't support DPO or FUA"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2154 | |
| 2155 | return; |
| 2156 | } |
| 2157 | |
| 2158 | bad_sense: |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 2159 | if (scsi_sense_valid(&sshdr) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2160 | sshdr.sense_key == ILLEGAL_REQUEST && |
| 2161 | sshdr.asc == 0x24 && sshdr.ascq == 0x0) |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 2162 | /* Invalid field in CDB */ |
| 2163 | sd_printk(KERN_NOTICE, sdkp, "Cache data unavailable\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2164 | else |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 2165 | sd_printk(KERN_ERR, sdkp, "Asking for cache data failed\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2166 | |
| 2167 | defaults: |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 2168 | sd_printk(KERN_ERR, sdkp, "Assuming drive cache: write through\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2169 | sdkp->WCE = 0; |
| 2170 | sdkp->RCD = 0; |
Al Viro | 4897080 | 2006-02-26 08:34:10 -0600 | [diff] [blame] | 2171 | sdkp->DPOFUA = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2172 | } |
| 2173 | |
Martin K. Petersen | e0597d7 | 2008-07-17 04:28:34 -0400 | [diff] [blame] | 2174 | /* |
| 2175 | * The ATO bit indicates whether the DIF application tag is available |
| 2176 | * for use by the operating system. |
| 2177 | */ |
H Hartley Sweeten | 439d77f | 2010-08-10 18:01:20 -0700 | [diff] [blame] | 2178 | static void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer) |
Martin K. Petersen | e0597d7 | 2008-07-17 04:28:34 -0400 | [diff] [blame] | 2179 | { |
| 2180 | int res, offset; |
| 2181 | struct scsi_device *sdp = sdkp->device; |
| 2182 | struct scsi_mode_data data; |
| 2183 | struct scsi_sense_hdr sshdr; |
| 2184 | |
| 2185 | if (sdp->type != TYPE_DISK) |
| 2186 | return; |
| 2187 | |
| 2188 | if (sdkp->protection_type == 0) |
| 2189 | return; |
| 2190 | |
| 2191 | res = scsi_mode_sense(sdp, 1, 0x0a, buffer, 36, SD_TIMEOUT, |
| 2192 | SD_MAX_RETRIES, &data, &sshdr); |
| 2193 | |
| 2194 | if (!scsi_status_is_good(res) || !data.header_length || |
| 2195 | data.length < 6) { |
| 2196 | sd_printk(KERN_WARNING, sdkp, |
| 2197 | "getting Control mode page failed, assume no ATO\n"); |
| 2198 | |
| 2199 | if (scsi_sense_valid(&sshdr)) |
| 2200 | sd_print_sense_hdr(sdkp, &sshdr); |
| 2201 | |
| 2202 | return; |
| 2203 | } |
| 2204 | |
| 2205 | offset = data.header_length + data.block_descriptor_length; |
| 2206 | |
| 2207 | if ((buffer[offset] & 0x3f) != 0x0a) { |
| 2208 | sd_printk(KERN_ERR, sdkp, "ATO Got wrong page\n"); |
| 2209 | return; |
| 2210 | } |
| 2211 | |
| 2212 | if ((buffer[offset + 5] & 0x80) == 0) |
| 2213 | return; |
| 2214 | |
| 2215 | sdkp->ATO = 1; |
| 2216 | |
| 2217 | return; |
| 2218 | } |
| 2219 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2220 | /** |
Martin K. Petersen | d11b691 | 2009-05-23 11:43:39 -0400 | [diff] [blame] | 2221 | * sd_read_block_limits - Query disk device for preferred I/O sizes. |
| 2222 | * @disk: disk to query |
| 2223 | */ |
| 2224 | static void sd_read_block_limits(struct scsi_disk *sdkp) |
| 2225 | { |
| 2226 | unsigned int sector_sz = sdkp->device->sector_size; |
Martin K. Petersen | bb2d3de | 2010-03-02 08:44:34 -0500 | [diff] [blame] | 2227 | const int vpd_len = 64; |
James Bottomley | e3deec0 | 2009-11-03 12:33:07 -0600 | [diff] [blame] | 2228 | unsigned char *buffer = kmalloc(vpd_len, GFP_KERNEL); |
Martin K. Petersen | d11b691 | 2009-05-23 11:43:39 -0400 | [diff] [blame] | 2229 | |
James Bottomley | e3deec0 | 2009-11-03 12:33:07 -0600 | [diff] [blame] | 2230 | if (!buffer || |
| 2231 | /* Block Limits VPD */ |
| 2232 | scsi_get_vpd_page(sdkp->device, 0xb0, buffer, vpd_len)) |
| 2233 | goto out; |
Martin K. Petersen | d11b691 | 2009-05-23 11:43:39 -0400 | [diff] [blame] | 2234 | |
| 2235 | blk_queue_io_min(sdkp->disk->queue, |
| 2236 | get_unaligned_be16(&buffer[6]) * sector_sz); |
| 2237 | blk_queue_io_opt(sdkp->disk->queue, |
| 2238 | get_unaligned_be32(&buffer[12]) * sector_sz); |
| 2239 | |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 2240 | if (buffer[3] == 0x3c) { |
| 2241 | unsigned int lba_count, desc_count; |
| 2242 | |
| 2243 | sdkp->max_ws_blocks = |
| 2244 | (u32) min_not_zero(get_unaligned_be64(&buffer[36]), |
| 2245 | (u64)0xffffffff); |
| 2246 | |
| 2247 | if (!sdkp->lbpme) |
| 2248 | goto out; |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 2249 | |
| 2250 | lba_count = get_unaligned_be32(&buffer[20]); |
| 2251 | desc_count = get_unaligned_be32(&buffer[24]); |
| 2252 | |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 2253 | if (lba_count && desc_count) |
| 2254 | sdkp->max_unmap_blocks = lba_count; |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 2255 | |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 2256 | sdkp->unmap_granularity = get_unaligned_be32(&buffer[28]); |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 2257 | |
| 2258 | if (buffer[32] & 0x80) |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 2259 | sdkp->unmap_alignment = |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 2260 | get_unaligned_be32(&buffer[32]) & ~(1 << 31); |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 2261 | |
| 2262 | if (!sdkp->lbpvpd) { /* LBP VPD page not provided */ |
| 2263 | |
| 2264 | if (sdkp->max_unmap_blocks) |
| 2265 | sd_config_discard(sdkp, SD_LBP_UNMAP); |
| 2266 | else |
| 2267 | sd_config_discard(sdkp, SD_LBP_WS16); |
| 2268 | |
| 2269 | } else { /* LBP VPD page tells us what to use */ |
| 2270 | |
| 2271 | if (sdkp->lbpu && sdkp->max_unmap_blocks) |
| 2272 | sd_config_discard(sdkp, SD_LBP_UNMAP); |
| 2273 | else if (sdkp->lbpws) |
| 2274 | sd_config_discard(sdkp, SD_LBP_WS16); |
| 2275 | else if (sdkp->lbpws10) |
| 2276 | sd_config_discard(sdkp, SD_LBP_WS10); |
| 2277 | else |
| 2278 | sd_config_discard(sdkp, SD_LBP_DISABLE); |
| 2279 | } |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 2280 | } |
| 2281 | |
James Bottomley | e3deec0 | 2009-11-03 12:33:07 -0600 | [diff] [blame] | 2282 | out: |
Martin K. Petersen | d11b691 | 2009-05-23 11:43:39 -0400 | [diff] [blame] | 2283 | kfree(buffer); |
| 2284 | } |
| 2285 | |
| 2286 | /** |
Martin K. Petersen | 3821d76 | 2009-05-23 11:43:38 -0400 | [diff] [blame] | 2287 | * sd_read_block_characteristics - Query block dev. characteristics |
| 2288 | * @disk: disk to query |
| 2289 | */ |
| 2290 | static void sd_read_block_characteristics(struct scsi_disk *sdkp) |
| 2291 | { |
James Bottomley | e3deec0 | 2009-11-03 12:33:07 -0600 | [diff] [blame] | 2292 | unsigned char *buffer; |
Martin K. Petersen | 3821d76 | 2009-05-23 11:43:38 -0400 | [diff] [blame] | 2293 | u16 rot; |
Martin K. Petersen | bb2d3de | 2010-03-02 08:44:34 -0500 | [diff] [blame] | 2294 | const int vpd_len = 64; |
Martin K. Petersen | 3821d76 | 2009-05-23 11:43:38 -0400 | [diff] [blame] | 2295 | |
James Bottomley | e3deec0 | 2009-11-03 12:33:07 -0600 | [diff] [blame] | 2296 | buffer = kmalloc(vpd_len, GFP_KERNEL); |
Martin K. Petersen | 3821d76 | 2009-05-23 11:43:38 -0400 | [diff] [blame] | 2297 | |
James Bottomley | e3deec0 | 2009-11-03 12:33:07 -0600 | [diff] [blame] | 2298 | if (!buffer || |
| 2299 | /* Block Device Characteristics VPD */ |
| 2300 | scsi_get_vpd_page(sdkp->device, 0xb1, buffer, vpd_len)) |
| 2301 | goto out; |
Martin K. Petersen | 3821d76 | 2009-05-23 11:43:38 -0400 | [diff] [blame] | 2302 | |
| 2303 | rot = get_unaligned_be16(&buffer[4]); |
| 2304 | |
| 2305 | if (rot == 1) |
| 2306 | queue_flag_set_unlocked(QUEUE_FLAG_NONROT, sdkp->disk->queue); |
| 2307 | |
James Bottomley | e3deec0 | 2009-11-03 12:33:07 -0600 | [diff] [blame] | 2308 | out: |
Martin K. Petersen | 3821d76 | 2009-05-23 11:43:38 -0400 | [diff] [blame] | 2309 | kfree(buffer); |
| 2310 | } |
| 2311 | |
Martin K. Petersen | 045d3fe | 2010-09-10 01:22:07 -0400 | [diff] [blame] | 2312 | /** |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 2313 | * sd_read_block_provisioning - Query provisioning VPD page |
Martin K. Petersen | 045d3fe | 2010-09-10 01:22:07 -0400 | [diff] [blame] | 2314 | * @disk: disk to query |
| 2315 | */ |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 2316 | static void sd_read_block_provisioning(struct scsi_disk *sdkp) |
Martin K. Petersen | 045d3fe | 2010-09-10 01:22:07 -0400 | [diff] [blame] | 2317 | { |
| 2318 | unsigned char *buffer; |
| 2319 | const int vpd_len = 8; |
| 2320 | |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 2321 | if (sdkp->lbpme == 0) |
Martin K. Petersen | 045d3fe | 2010-09-10 01:22:07 -0400 | [diff] [blame] | 2322 | return; |
| 2323 | |
| 2324 | buffer = kmalloc(vpd_len, GFP_KERNEL); |
| 2325 | |
| 2326 | if (!buffer || scsi_get_vpd_page(sdkp->device, 0xb2, buffer, vpd_len)) |
| 2327 | goto out; |
| 2328 | |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 2329 | sdkp->lbpvpd = 1; |
| 2330 | sdkp->lbpu = (buffer[5] >> 7) & 1; /* UNMAP */ |
| 2331 | sdkp->lbpws = (buffer[5] >> 6) & 1; /* WRITE SAME(16) with UNMAP */ |
| 2332 | sdkp->lbpws10 = (buffer[5] >> 5) & 1; /* WRITE SAME(10) with UNMAP */ |
Martin K. Petersen | 045d3fe | 2010-09-10 01:22:07 -0400 | [diff] [blame] | 2333 | |
| 2334 | out: |
| 2335 | kfree(buffer); |
| 2336 | } |
| 2337 | |
Martin K. Petersen | ffd4bc2 | 2009-07-29 14:06:53 -0400 | [diff] [blame] | 2338 | static int sd_try_extended_inquiry(struct scsi_device *sdp) |
| 2339 | { |
| 2340 | /* |
| 2341 | * Although VPD inquiries can go to SCSI-2 type devices, |
| 2342 | * some USB ones crash on receiving them, and the pages |
| 2343 | * we currently ask for are for SPC-3 and beyond |
| 2344 | */ |
| 2345 | if (sdp->scsi_level > SCSI_SPC_2) |
| 2346 | return 1; |
| 2347 | return 0; |
| 2348 | } |
| 2349 | |
Martin K. Petersen | 3821d76 | 2009-05-23 11:43:38 -0400 | [diff] [blame] | 2350 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2351 | * sd_revalidate_disk - called the first time a new disk is seen, |
| 2352 | * performs disk spin up, read_capacity, etc. |
| 2353 | * @disk: struct gendisk we care about |
| 2354 | **/ |
| 2355 | static int sd_revalidate_disk(struct gendisk *disk) |
| 2356 | { |
| 2357 | struct scsi_disk *sdkp = scsi_disk(disk); |
| 2358 | struct scsi_device *sdp = sdkp->device; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2359 | unsigned char *buffer; |
Tejun Heo | 4913efe | 2010-09-03 11:56:16 +0200 | [diff] [blame] | 2360 | unsigned flush = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2361 | |
Martin K. Petersen | fa0d34b | 2007-02-27 22:41:19 -0500 | [diff] [blame] | 2362 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, |
| 2363 | "sd_revalidate_disk\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2364 | |
| 2365 | /* |
| 2366 | * If the device is offline, don't try and read capacity or any |
| 2367 | * of the other niceties. |
| 2368 | */ |
| 2369 | if (!scsi_device_online(sdp)) |
| 2370 | goto out; |
| 2371 | |
Bernhard Walle | a6123f1 | 2007-05-21 17:15:26 +0200 | [diff] [blame] | 2372 | buffer = kmalloc(SD_BUF_SIZE, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2373 | if (!buffer) { |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 2374 | sd_printk(KERN_WARNING, sdkp, "sd_revalidate_disk: Memory " |
| 2375 | "allocation failure.\n"); |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 2376 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2377 | } |
| 2378 | |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 2379 | sd_spinup_disk(sdkp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2380 | |
| 2381 | /* |
| 2382 | * Without media there is no reason to ask; moreover, some devices |
| 2383 | * react badly if we do. |
| 2384 | */ |
| 2385 | if (sdkp->media_present) { |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 2386 | sd_read_capacity(sdkp, buffer); |
Martin K. Petersen | ffd4bc2 | 2009-07-29 14:06:53 -0400 | [diff] [blame] | 2387 | |
| 2388 | if (sd_try_extended_inquiry(sdp)) { |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 2389 | sd_read_block_provisioning(sdkp); |
Martin K. Petersen | ffd4bc2 | 2009-07-29 14:06:53 -0400 | [diff] [blame] | 2390 | sd_read_block_limits(sdkp); |
| 2391 | sd_read_block_characteristics(sdkp); |
| 2392 | } |
| 2393 | |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 2394 | sd_read_write_protect_flag(sdkp, buffer); |
| 2395 | sd_read_cache_type(sdkp, buffer); |
Martin K. Petersen | e0597d7 | 2008-07-17 04:28:34 -0400 | [diff] [blame] | 2396 | sd_read_app_tag_own(sdkp, buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2397 | } |
Tejun Heo | 461d4e9 | 2006-01-06 09:52:55 +0100 | [diff] [blame] | 2398 | |
Martin K. Petersen | 70a9b87 | 2009-03-09 11:33:31 -0400 | [diff] [blame] | 2399 | sdkp->first_scan = 0; |
| 2400 | |
Tejun Heo | 461d4e9 | 2006-01-06 09:52:55 +0100 | [diff] [blame] | 2401 | /* |
| 2402 | * We now have all cache related info, determine how we deal |
Tejun Heo | 4913efe | 2010-09-03 11:56:16 +0200 | [diff] [blame] | 2403 | * with flush requests. |
Tejun Heo | 461d4e9 | 2006-01-06 09:52:55 +0100 | [diff] [blame] | 2404 | */ |
Tejun Heo | 4913efe | 2010-09-03 11:56:16 +0200 | [diff] [blame] | 2405 | if (sdkp->WCE) { |
| 2406 | flush |= REQ_FLUSH; |
| 2407 | if (sdkp->DPOFUA) |
| 2408 | flush |= REQ_FUA; |
| 2409 | } |
Tejun Heo | 461d4e9 | 2006-01-06 09:52:55 +0100 | [diff] [blame] | 2410 | |
Tejun Heo | 4913efe | 2010-09-03 11:56:16 +0200 | [diff] [blame] | 2411 | blk_queue_flush(sdkp->disk->queue, flush); |
Tejun Heo | 461d4e9 | 2006-01-06 09:52:55 +0100 | [diff] [blame] | 2412 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2413 | set_capacity(disk, sdkp->capacity); |
| 2414 | kfree(buffer); |
| 2415 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2416 | out: |
| 2417 | return 0; |
| 2418 | } |
| 2419 | |
| 2420 | /** |
Tejun Heo | 72ec24b | 2010-05-15 20:09:32 +0200 | [diff] [blame] | 2421 | * sd_unlock_native_capacity - unlock native capacity |
| 2422 | * @disk: struct gendisk to set capacity for |
| 2423 | * |
| 2424 | * Block layer calls this function if it detects that partitions |
| 2425 | * on @disk reach beyond the end of the device. If the SCSI host |
| 2426 | * implements ->unlock_native_capacity() method, it's invoked to |
| 2427 | * give it a chance to adjust the device capacity. |
| 2428 | * |
| 2429 | * CONTEXT: |
| 2430 | * Defined by block layer. Might sleep. |
| 2431 | */ |
| 2432 | static void sd_unlock_native_capacity(struct gendisk *disk) |
| 2433 | { |
| 2434 | struct scsi_device *sdev = scsi_disk(disk)->device; |
| 2435 | |
| 2436 | if (sdev->host->hostt->unlock_native_capacity) |
| 2437 | sdev->host->hostt->unlock_native_capacity(sdev); |
| 2438 | } |
| 2439 | |
| 2440 | /** |
Tejun Heo | 3e1a7ff | 2008-08-25 19:56:17 +0900 | [diff] [blame] | 2441 | * sd_format_disk_name - format disk name |
| 2442 | * @prefix: name prefix - ie. "sd" for SCSI disks |
| 2443 | * @index: index of the disk to format name for |
| 2444 | * @buf: output buffer |
| 2445 | * @buflen: length of the output buffer |
| 2446 | * |
| 2447 | * SCSI disk names starts at sda. The 26th device is sdz and the |
| 2448 | * 27th is sdaa. The last one for two lettered suffix is sdzz |
| 2449 | * which is followed by sdaaa. |
| 2450 | * |
| 2451 | * This is basically 26 base counting with one extra 'nil' entry |
Daniel Mack | 3ad2f3f | 2010-02-03 08:01:28 +0800 | [diff] [blame] | 2452 | * at the beginning from the second digit on and can be |
Tejun Heo | 3e1a7ff | 2008-08-25 19:56:17 +0900 | [diff] [blame] | 2453 | * determined using similar method as 26 base conversion with the |
| 2454 | * index shifted -1 after each digit is computed. |
| 2455 | * |
| 2456 | * CONTEXT: |
| 2457 | * Don't care. |
| 2458 | * |
| 2459 | * RETURNS: |
| 2460 | * 0 on success, -errno on failure. |
| 2461 | */ |
| 2462 | static int sd_format_disk_name(char *prefix, int index, char *buf, int buflen) |
| 2463 | { |
| 2464 | const int base = 'z' - 'a' + 1; |
| 2465 | char *begin = buf + strlen(prefix); |
| 2466 | char *end = buf + buflen; |
| 2467 | char *p; |
| 2468 | int unit; |
| 2469 | |
| 2470 | p = end - 1; |
| 2471 | *p = '\0'; |
| 2472 | unit = base; |
| 2473 | do { |
| 2474 | if (p == begin) |
| 2475 | return -EINVAL; |
| 2476 | *--p = 'a' + (index % unit); |
| 2477 | index = (index / unit) - 1; |
| 2478 | } while (index >= 0); |
| 2479 | |
| 2480 | memmove(begin, p, end - p); |
| 2481 | memcpy(buf, prefix, strlen(prefix)); |
| 2482 | |
| 2483 | return 0; |
| 2484 | } |
| 2485 | |
Arjan van de Ven | 4ace92f | 2009-01-04 05:32:28 -0800 | [diff] [blame] | 2486 | /* |
| 2487 | * The asynchronous part of sd_probe |
| 2488 | */ |
| 2489 | static void sd_probe_async(void *data, async_cookie_t cookie) |
| 2490 | { |
| 2491 | struct scsi_disk *sdkp = data; |
| 2492 | struct scsi_device *sdp; |
| 2493 | struct gendisk *gd; |
| 2494 | u32 index; |
| 2495 | struct device *dev; |
| 2496 | |
| 2497 | sdp = sdkp->device; |
| 2498 | gd = sdkp->disk; |
| 2499 | index = sdkp->index; |
| 2500 | dev = &sdp->sdev_gendev; |
| 2501 | |
Michael Reed | 1a03ae0 | 2010-09-20 11:20:22 -0500 | [diff] [blame] | 2502 | gd->major = sd_major((index & 0xf0) >> 4); |
| 2503 | gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00); |
| 2504 | gd->minors = SD_MINORS; |
| 2505 | |
Arjan van de Ven | 4ace92f | 2009-01-04 05:32:28 -0800 | [diff] [blame] | 2506 | gd->fops = &sd_fops; |
| 2507 | gd->private_data = &sdkp->driver; |
| 2508 | gd->queue = sdkp->device->request_queue; |
| 2509 | |
Martin K. Petersen | 70a9b87 | 2009-03-09 11:33:31 -0400 | [diff] [blame] | 2510 | /* defaults, until the device tells us otherwise */ |
| 2511 | sdp->sector_size = 512; |
| 2512 | sdkp->capacity = 0; |
| 2513 | sdkp->media_present = 1; |
| 2514 | sdkp->write_prot = 0; |
| 2515 | sdkp->WCE = 0; |
| 2516 | sdkp->RCD = 0; |
| 2517 | sdkp->ATO = 0; |
| 2518 | sdkp->first_scan = 1; |
| 2519 | |
Arjan van de Ven | 4ace92f | 2009-01-04 05:32:28 -0800 | [diff] [blame] | 2520 | sd_revalidate_disk(gd); |
| 2521 | |
| 2522 | blk_queue_prep_rq(sdp->request_queue, sd_prep_fn); |
FUJITA Tomonori | f1126e9 | 2010-07-01 19:49:18 +0900 | [diff] [blame] | 2523 | blk_queue_unprep_rq(sdp->request_queue, sd_unprep_fn); |
Arjan van de Ven | 4ace92f | 2009-01-04 05:32:28 -0800 | [diff] [blame] | 2524 | |
| 2525 | gd->driverfs_dev = &sdp->sdev_gendev; |
NeilBrown | 97fedbb | 2010-03-16 08:55:32 +0100 | [diff] [blame] | 2526 | gd->flags = GENHD_FL_EXT_DEVT; |
Tejun Heo | 2bae009 | 2010-12-18 18:42:23 +0100 | [diff] [blame] | 2527 | if (sdp->removable) { |
Arjan van de Ven | 4ace92f | 2009-01-04 05:32:28 -0800 | [diff] [blame] | 2528 | gd->flags |= GENHD_FL_REMOVABLE; |
Tejun Heo | 2bae009 | 2010-12-18 18:42:23 +0100 | [diff] [blame] | 2529 | gd->events |= DISK_EVENT_MEDIA_CHANGE; |
| 2530 | } |
Arjan van de Ven | 4ace92f | 2009-01-04 05:32:28 -0800 | [diff] [blame] | 2531 | |
Arjan van de Ven | 4ace92f | 2009-01-04 05:32:28 -0800 | [diff] [blame] | 2532 | add_disk(gd); |
| 2533 | sd_dif_config_host(sdkp); |
| 2534 | |
Martin K. Petersen | 3821d76 | 2009-05-23 11:43:38 -0400 | [diff] [blame] | 2535 | sd_revalidate_disk(gd); |
| 2536 | |
Arjan van de Ven | 4ace92f | 2009-01-04 05:32:28 -0800 | [diff] [blame] | 2537 | sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n", |
| 2538 | sdp->removable ? "removable " : ""); |
Alan Stern | 478a8a0 | 2010-06-16 14:52:17 -0400 | [diff] [blame] | 2539 | scsi_autopm_put_device(sdp); |
James Bottomley | ea038f6 | 2009-08-21 09:47:54 -0600 | [diff] [blame] | 2540 | put_device(&sdkp->dev); |
Arjan van de Ven | 4ace92f | 2009-01-04 05:32:28 -0800 | [diff] [blame] | 2541 | } |
| 2542 | |
Tejun Heo | 3e1a7ff | 2008-08-25 19:56:17 +0900 | [diff] [blame] | 2543 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2544 | * sd_probe - called during driver initialization and whenever a |
| 2545 | * new scsi device is attached to the system. It is called once |
| 2546 | * for each scsi device (not just disks) present. |
| 2547 | * @dev: pointer to device object |
| 2548 | * |
| 2549 | * Returns 0 if successful (or not interested in this scsi device |
| 2550 | * (e.g. scanner)); 1 when there is an error. |
| 2551 | * |
| 2552 | * Note: this function is invoked from the scsi mid-level. |
| 2553 | * This function sets up the mapping between a given |
| 2554 | * <host,channel,id,lun> (found in sdp) and new device name |
| 2555 | * (e.g. /dev/sda). More precisely it is the block device major |
| 2556 | * and minor number that is chosen here. |
| 2557 | * |
| 2558 | * Assume sd_attach is not re-entrant (for time being) |
| 2559 | * Also think about sd_attach() and sd_remove() running coincidentally. |
| 2560 | **/ |
| 2561 | static int sd_probe(struct device *dev) |
| 2562 | { |
| 2563 | struct scsi_device *sdp = to_scsi_device(dev); |
| 2564 | struct scsi_disk *sdkp; |
| 2565 | struct gendisk *gd; |
H Hartley Sweeten | 439d77f | 2010-08-10 18:01:20 -0700 | [diff] [blame] | 2566 | int index; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2567 | int error; |
| 2568 | |
| 2569 | error = -ENODEV; |
Al Viro | 631e8a1 | 2005-05-16 01:59:55 +0100 | [diff] [blame] | 2570 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_MOD && sdp->type != TYPE_RBC) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2571 | goto out; |
| 2572 | |
James Bottomley | 9ccfc75 | 2005-10-02 11:45:08 -0500 | [diff] [blame] | 2573 | SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO, sdp, |
| 2574 | "sd_attach\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2575 | |
| 2576 | error = -ENOMEM; |
Jes Sorensen | 24669f75 | 2006-01-16 10:31:18 -0500 | [diff] [blame] | 2577 | sdkp = kzalloc(sizeof(*sdkp), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2578 | if (!sdkp) |
| 2579 | goto out; |
| 2580 | |
Tejun Heo | 689d6fa | 2008-08-25 19:56:16 +0900 | [diff] [blame] | 2581 | gd = alloc_disk(SD_MINORS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2582 | if (!gd) |
| 2583 | goto out_free; |
| 2584 | |
Tejun Heo | f27bac2 | 2008-07-14 14:59:30 +0900 | [diff] [blame] | 2585 | do { |
| 2586 | if (!ida_pre_get(&sd_index_ida, GFP_KERNEL)) |
| 2587 | goto out_put; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2588 | |
Tejun Heo | 4034cc6 | 2009-02-21 11:04:45 +0900 | [diff] [blame] | 2589 | spin_lock(&sd_index_lock); |
Tejun Heo | f27bac2 | 2008-07-14 14:59:30 +0900 | [diff] [blame] | 2590 | error = ida_get_new(&sd_index_ida, &index); |
Tejun Heo | 4034cc6 | 2009-02-21 11:04:45 +0900 | [diff] [blame] | 2591 | spin_unlock(&sd_index_lock); |
Tejun Heo | f27bac2 | 2008-07-14 14:59:30 +0900 | [diff] [blame] | 2592 | } while (error == -EAGAIN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2593 | |
Dave Kleikamp | 21208ae | 2011-10-19 11:49:04 -0500 | [diff] [blame] | 2594 | if (error) { |
| 2595 | sdev_printk(KERN_WARNING, sdp, "sd_probe: memory exhausted.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2596 | goto out_put; |
Michael Reed | 1a03ae0 | 2010-09-20 11:20:22 -0500 | [diff] [blame] | 2597 | } |
| 2598 | |
Tejun Heo | 3e1a7ff | 2008-08-25 19:56:17 +0900 | [diff] [blame] | 2599 | error = sd_format_disk_name("sd", index, gd->disk_name, DISK_NAME_LEN); |
Dave Kleikamp | 21208ae | 2011-10-19 11:49:04 -0500 | [diff] [blame] | 2600 | if (error) { |
| 2601 | sdev_printk(KERN_WARNING, sdp, "SCSI disk (sd) name length exceeded.\n"); |
Tejun Heo | f27bac2 | 2008-07-14 14:59:30 +0900 | [diff] [blame] | 2602 | goto out_free_index; |
Dave Kleikamp | 21208ae | 2011-10-19 11:49:04 -0500 | [diff] [blame] | 2603 | } |
Tejun Heo | f27bac2 | 2008-07-14 14:59:30 +0900 | [diff] [blame] | 2604 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2605 | sdkp->device = sdp; |
| 2606 | sdkp->driver = &sd_template; |
| 2607 | sdkp->disk = gd; |
| 2608 | sdkp->index = index; |
Arnd Bergmann | 409f349 | 2010-07-07 16:51:29 +0200 | [diff] [blame] | 2609 | atomic_set(&sdkp->openers, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2610 | |
James Bottomley | 601e763 | 2009-05-26 20:35:48 +0000 | [diff] [blame] | 2611 | if (!sdp->request_queue->rq_timeout) { |
| 2612 | if (sdp->type != TYPE_MOD) |
| 2613 | blk_queue_rq_timeout(sdp->request_queue, SD_TIMEOUT); |
| 2614 | else |
| 2615 | blk_queue_rq_timeout(sdp->request_queue, |
| 2616 | SD_MOD_TIMEOUT); |
| 2617 | } |
| 2618 | |
| 2619 | device_initialize(&sdkp->dev); |
Alan Stern | 478a8a0 | 2010-06-16 14:52:17 -0400 | [diff] [blame] | 2620 | sdkp->dev.parent = dev; |
James Bottomley | 601e763 | 2009-05-26 20:35:48 +0000 | [diff] [blame] | 2621 | sdkp->dev.class = &sd_disk_class; |
Alan Stern | 478a8a0 | 2010-06-16 14:52:17 -0400 | [diff] [blame] | 2622 | dev_set_name(&sdkp->dev, dev_name(dev)); |
James Bottomley | 601e763 | 2009-05-26 20:35:48 +0000 | [diff] [blame] | 2623 | |
| 2624 | if (device_add(&sdkp->dev)) |
| 2625 | goto out_free_index; |
| 2626 | |
Alan Stern | 478a8a0 | 2010-06-16 14:52:17 -0400 | [diff] [blame] | 2627 | get_device(dev); |
| 2628 | dev_set_drvdata(dev, sdkp); |
James Bottomley | 601e763 | 2009-05-26 20:35:48 +0000 | [diff] [blame] | 2629 | |
James Bottomley | ea038f6 | 2009-08-21 09:47:54 -0600 | [diff] [blame] | 2630 | get_device(&sdkp->dev); /* prevent release before async_schedule */ |
Arjan van de Ven | 4ace92f | 2009-01-04 05:32:28 -0800 | [diff] [blame] | 2631 | async_schedule(sd_probe_async, sdkp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2632 | |
| 2633 | return 0; |
| 2634 | |
Tejun Heo | f27bac2 | 2008-07-14 14:59:30 +0900 | [diff] [blame] | 2635 | out_free_index: |
Tejun Heo | 4034cc6 | 2009-02-21 11:04:45 +0900 | [diff] [blame] | 2636 | spin_lock(&sd_index_lock); |
Tejun Heo | f27bac2 | 2008-07-14 14:59:30 +0900 | [diff] [blame] | 2637 | ida_remove(&sd_index_ida, index); |
Tejun Heo | 4034cc6 | 2009-02-21 11:04:45 +0900 | [diff] [blame] | 2638 | spin_unlock(&sd_index_lock); |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 2639 | out_put: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2640 | put_disk(gd); |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 2641 | out_free: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2642 | kfree(sdkp); |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 2643 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2644 | return error; |
| 2645 | } |
| 2646 | |
| 2647 | /** |
| 2648 | * sd_remove - called whenever a scsi disk (previously recognized by |
| 2649 | * sd_probe) is detached from the system. It is called (potentially |
| 2650 | * multiple times) during sd module unload. |
| 2651 | * @sdp: pointer to mid level scsi device object |
| 2652 | * |
| 2653 | * Note: this function is invoked from the scsi mid-level. |
| 2654 | * This function potentially frees up a device name (e.g. /dev/sdc) |
| 2655 | * that could be re-used by a subsequent sd_probe(). |
| 2656 | * This function is not called when the built-in sd driver is "exit-ed". |
| 2657 | **/ |
| 2658 | static int sd_remove(struct device *dev) |
| 2659 | { |
James Bottomley | 601e763 | 2009-05-26 20:35:48 +0000 | [diff] [blame] | 2660 | struct scsi_disk *sdkp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2661 | |
James Bottomley | 601e763 | 2009-05-26 20:35:48 +0000 | [diff] [blame] | 2662 | sdkp = dev_get_drvdata(dev); |
Alan Stern | 478a8a0 | 2010-06-16 14:52:17 -0400 | [diff] [blame] | 2663 | scsi_autopm_get_device(sdkp->device); |
| 2664 | |
| 2665 | async_synchronize_full(); |
Hannes Reinecke | b391277 | 2009-06-18 09:57:18 +0200 | [diff] [blame] | 2666 | blk_queue_prep_rq(sdkp->device->request_queue, scsi_prep_fn); |
FUJITA Tomonori | 82b6d57 | 2010-07-03 08:07:04 -0600 | [diff] [blame] | 2667 | blk_queue_unprep_rq(sdkp->device->request_queue, NULL); |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 2668 | device_del(&sdkp->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2669 | del_gendisk(sdkp->disk); |
| 2670 | sd_shutdown(dev); |
Alan Stern | 39b7f1e | 2005-11-04 14:44:41 -0500 | [diff] [blame] | 2671 | |
Arjan van de Ven | 0b95067 | 2006-01-11 13:16:10 +0100 | [diff] [blame] | 2672 | mutex_lock(&sd_ref_mutex); |
Alan Stern | 39b7f1e | 2005-11-04 14:44:41 -0500 | [diff] [blame] | 2673 | dev_set_drvdata(dev, NULL); |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 2674 | put_device(&sdkp->dev); |
Arjan van de Ven | 0b95067 | 2006-01-11 13:16:10 +0100 | [diff] [blame] | 2675 | mutex_unlock(&sd_ref_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2676 | |
| 2677 | return 0; |
| 2678 | } |
| 2679 | |
| 2680 | /** |
| 2681 | * scsi_disk_release - Called to free the scsi_disk structure |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 2682 | * @dev: pointer to embedded class device |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2683 | * |
Arjan van de Ven | 0b95067 | 2006-01-11 13:16:10 +0100 | [diff] [blame] | 2684 | * sd_ref_mutex must be held entering this routine. Because it is |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2685 | * called on last put, you should always use the scsi_disk_get() |
| 2686 | * scsi_disk_put() helpers which manipulate the semaphore directly |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 2687 | * and never do a direct put_device. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2688 | **/ |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 2689 | static void scsi_disk_release(struct device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2690 | { |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 2691 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2692 | struct gendisk *disk = sdkp->disk; |
| 2693 | |
Tejun Heo | 4034cc6 | 2009-02-21 11:04:45 +0900 | [diff] [blame] | 2694 | spin_lock(&sd_index_lock); |
Tejun Heo | f27bac2 | 2008-07-14 14:59:30 +0900 | [diff] [blame] | 2695 | ida_remove(&sd_index_ida, sdkp->index); |
Tejun Heo | 4034cc6 | 2009-02-21 11:04:45 +0900 | [diff] [blame] | 2696 | spin_unlock(&sd_index_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2697 | |
| 2698 | disk->private_data = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2699 | put_disk(disk); |
Alan Stern | 39b7f1e | 2005-11-04 14:44:41 -0500 | [diff] [blame] | 2700 | put_device(&sdkp->device->sdev_gendev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2701 | |
| 2702 | kfree(sdkp); |
| 2703 | } |
| 2704 | |
James Bottomley | cc5d2c8 | 2007-03-20 12:26:03 -0500 | [diff] [blame] | 2705 | static int sd_start_stop_device(struct scsi_disk *sdkp, int start) |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 2706 | { |
| 2707 | unsigned char cmd[6] = { START_STOP }; /* START_VALID */ |
| 2708 | struct scsi_sense_hdr sshdr; |
James Bottomley | cc5d2c8 | 2007-03-20 12:26:03 -0500 | [diff] [blame] | 2709 | struct scsi_device *sdp = sdkp->device; |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 2710 | int res; |
| 2711 | |
| 2712 | if (start) |
| 2713 | cmd[4] |= 1; /* START */ |
| 2714 | |
Stefan Richter | d2886ea | 2008-05-11 00:34:07 +0200 | [diff] [blame] | 2715 | if (sdp->start_stop_pwr_cond) |
| 2716 | cmd[4] |= start ? 1 << 4 : 3 << 4; /* Active or Standby */ |
| 2717 | |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 2718 | if (!scsi_device_online(sdp)) |
| 2719 | return -ENODEV; |
| 2720 | |
| 2721 | res = scsi_execute_req(sdp, cmd, DMA_NONE, NULL, 0, &sshdr, |
FUJITA Tomonori | f4f4e47 | 2008-12-04 14:24:39 +0900 | [diff] [blame] | 2722 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 2723 | if (res) { |
James Bottomley | cc5d2c8 | 2007-03-20 12:26:03 -0500 | [diff] [blame] | 2724 | sd_printk(KERN_WARNING, sdkp, "START_STOP FAILED\n"); |
| 2725 | sd_print_result(sdkp, res); |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 2726 | if (driver_byte(res) & DRIVER_SENSE) |
James Bottomley | cc5d2c8 | 2007-03-20 12:26:03 -0500 | [diff] [blame] | 2727 | sd_print_sense_hdr(sdkp, &sshdr); |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 2728 | } |
| 2729 | |
| 2730 | return res; |
| 2731 | } |
| 2732 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2733 | /* |
| 2734 | * Send a SYNCHRONIZE CACHE instruction down to the device through |
| 2735 | * the normal SCSI command structure. Wait for the command to |
| 2736 | * complete. |
| 2737 | */ |
| 2738 | static void sd_shutdown(struct device *dev) |
| 2739 | { |
Alan Stern | 39b7f1e | 2005-11-04 14:44:41 -0500 | [diff] [blame] | 2740 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2741 | |
| 2742 | if (!sdkp) |
| 2743 | return; /* this can happen */ |
| 2744 | |
Lin Ming | 54f57588 | 2011-12-05 09:20:26 +0800 | [diff] [blame] | 2745 | if (pm_runtime_suspended(dev)) |
| 2746 | goto exit; |
| 2747 | |
Alan Stern | 39b7f1e | 2005-11-04 14:44:41 -0500 | [diff] [blame] | 2748 | if (sdkp->WCE) { |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 2749 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
| 2750 | sd_sync_cache(sdkp); |
Alan Stern | 39b7f1e | 2005-11-04 14:44:41 -0500 | [diff] [blame] | 2751 | } |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 2752 | |
James Bottomley | cc5d2c8 | 2007-03-20 12:26:03 -0500 | [diff] [blame] | 2753 | if (system_state != SYSTEM_RESTART && sdkp->device->manage_start_stop) { |
| 2754 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); |
| 2755 | sd_start_stop_device(sdkp, 0); |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 2756 | } |
| 2757 | |
Lin Ming | 54f57588 | 2011-12-05 09:20:26 +0800 | [diff] [blame] | 2758 | exit: |
Alan Stern | 39b7f1e | 2005-11-04 14:44:41 -0500 | [diff] [blame] | 2759 | scsi_disk_put(sdkp); |
| 2760 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2761 | |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 2762 | static int sd_suspend(struct device *dev, pm_message_t mesg) |
| 2763 | { |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 2764 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
Alan Stern | 09ff92f | 2007-05-21 09:55:04 -0400 | [diff] [blame] | 2765 | int ret = 0; |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 2766 | |
| 2767 | if (!sdkp) |
| 2768 | return 0; /* this can happen */ |
| 2769 | |
| 2770 | if (sdkp->WCE) { |
James Bottomley | cc5d2c8 | 2007-03-20 12:26:03 -0500 | [diff] [blame] | 2771 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 2772 | ret = sd_sync_cache(sdkp); |
| 2773 | if (ret) |
Alan Stern | 09ff92f | 2007-05-21 09:55:04 -0400 | [diff] [blame] | 2774 | goto done; |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 2775 | } |
| 2776 | |
Rafael J. Wysocki | 3a2d5b7 | 2008-02-23 19:13:25 +0100 | [diff] [blame] | 2777 | if ((mesg.event & PM_EVENT_SLEEP) && sdkp->device->manage_start_stop) { |
James Bottomley | cc5d2c8 | 2007-03-20 12:26:03 -0500 | [diff] [blame] | 2778 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); |
| 2779 | ret = sd_start_stop_device(sdkp, 0); |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 2780 | } |
| 2781 | |
Alan Stern | 09ff92f | 2007-05-21 09:55:04 -0400 | [diff] [blame] | 2782 | done: |
| 2783 | scsi_disk_put(sdkp); |
| 2784 | return ret; |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 2785 | } |
| 2786 | |
| 2787 | static int sd_resume(struct device *dev) |
| 2788 | { |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 2789 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
Alan Stern | 09ff92f | 2007-05-21 09:55:04 -0400 | [diff] [blame] | 2790 | int ret = 0; |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 2791 | |
James Bottomley | cc5d2c8 | 2007-03-20 12:26:03 -0500 | [diff] [blame] | 2792 | if (!sdkp->device->manage_start_stop) |
Alan Stern | 09ff92f | 2007-05-21 09:55:04 -0400 | [diff] [blame] | 2793 | goto done; |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 2794 | |
James Bottomley | cc5d2c8 | 2007-03-20 12:26:03 -0500 | [diff] [blame] | 2795 | sd_printk(KERN_NOTICE, sdkp, "Starting disk\n"); |
Alan Stern | 09ff92f | 2007-05-21 09:55:04 -0400 | [diff] [blame] | 2796 | ret = sd_start_stop_device(sdkp, 1); |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 2797 | |
Alan Stern | 09ff92f | 2007-05-21 09:55:04 -0400 | [diff] [blame] | 2798 | done: |
| 2799 | scsi_disk_put(sdkp); |
| 2800 | return ret; |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 2801 | } |
| 2802 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2803 | /** |
| 2804 | * init_sd - entry point for this driver (both when built in or when |
| 2805 | * a module). |
| 2806 | * |
| 2807 | * Note: this function registers this driver with the scsi mid-level. |
| 2808 | **/ |
| 2809 | static int __init init_sd(void) |
| 2810 | { |
Jeff Garzik | 5e4009b | 2006-10-04 05:32:54 -0400 | [diff] [blame] | 2811 | int majors = 0, i, err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2812 | |
| 2813 | SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n")); |
| 2814 | |
| 2815 | for (i = 0; i < SD_MAJORS; i++) |
| 2816 | if (register_blkdev(sd_major(i), "sd") == 0) |
| 2817 | majors++; |
| 2818 | |
| 2819 | if (!majors) |
| 2820 | return -ENODEV; |
| 2821 | |
Jeff Garzik | 5e4009b | 2006-10-04 05:32:54 -0400 | [diff] [blame] | 2822 | err = class_register(&sd_disk_class); |
| 2823 | if (err) |
| 2824 | goto err_out; |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 2825 | |
Jeff Garzik | 5e4009b | 2006-10-04 05:32:54 -0400 | [diff] [blame] | 2826 | err = scsi_register_driver(&sd_template.gendrv); |
| 2827 | if (err) |
| 2828 | goto err_out_class; |
| 2829 | |
Martin K. Petersen | 4e7392e | 2009-09-20 16:49:38 -0400 | [diff] [blame] | 2830 | sd_cdb_cache = kmem_cache_create("sd_ext_cdb", SD_EXT_CDB_SIZE, |
| 2831 | 0, 0, NULL); |
| 2832 | if (!sd_cdb_cache) { |
| 2833 | printk(KERN_ERR "sd: can't init extended cdb cache\n"); |
| 2834 | goto err_out_class; |
| 2835 | } |
| 2836 | |
| 2837 | sd_cdb_pool = mempool_create_slab_pool(SD_MEMPOOL_SIZE, sd_cdb_cache); |
| 2838 | if (!sd_cdb_pool) { |
| 2839 | printk(KERN_ERR "sd: can't init extended cdb pool\n"); |
| 2840 | goto err_out_cache; |
| 2841 | } |
| 2842 | |
Jeff Garzik | 5e4009b | 2006-10-04 05:32:54 -0400 | [diff] [blame] | 2843 | return 0; |
| 2844 | |
Martin K. Petersen | 4e7392e | 2009-09-20 16:49:38 -0400 | [diff] [blame] | 2845 | err_out_cache: |
| 2846 | kmem_cache_destroy(sd_cdb_cache); |
| 2847 | |
Jeff Garzik | 5e4009b | 2006-10-04 05:32:54 -0400 | [diff] [blame] | 2848 | err_out_class: |
| 2849 | class_unregister(&sd_disk_class); |
| 2850 | err_out: |
| 2851 | for (i = 0; i < SD_MAJORS; i++) |
| 2852 | unregister_blkdev(sd_major(i), "sd"); |
| 2853 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2854 | } |
| 2855 | |
| 2856 | /** |
| 2857 | * exit_sd - exit point for this driver (when it is a module). |
| 2858 | * |
| 2859 | * Note: this function unregisters this driver from the scsi mid-level. |
| 2860 | **/ |
| 2861 | static void __exit exit_sd(void) |
| 2862 | { |
| 2863 | int i; |
| 2864 | |
| 2865 | SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n")); |
| 2866 | |
Martin K. Petersen | 4e7392e | 2009-09-20 16:49:38 -0400 | [diff] [blame] | 2867 | mempool_destroy(sd_cdb_pool); |
| 2868 | kmem_cache_destroy(sd_cdb_cache); |
| 2869 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2870 | scsi_unregister_driver(&sd_template.gendrv); |
Jeff Garzik | 5e4009b | 2006-10-04 05:32:54 -0400 | [diff] [blame] | 2871 | class_unregister(&sd_disk_class); |
| 2872 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2873 | for (i = 0; i < SD_MAJORS; i++) |
| 2874 | unregister_blkdev(sd_major(i), "sd"); |
| 2875 | } |
| 2876 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2877 | module_init(init_sd); |
| 2878 | module_exit(exit_sd); |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 2879 | |
| 2880 | static void sd_print_sense_hdr(struct scsi_disk *sdkp, |
| 2881 | struct scsi_sense_hdr *sshdr) |
| 2882 | { |
David Miller | 2e4c332 | 2010-08-31 13:35:31 -0700 | [diff] [blame] | 2883 | sd_printk(KERN_INFO, sdkp, " "); |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 2884 | scsi_show_sense_hdr(sshdr); |
David Miller | 2e4c332 | 2010-08-31 13:35:31 -0700 | [diff] [blame] | 2885 | sd_printk(KERN_INFO, sdkp, " "); |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 2886 | scsi_show_extd_sense(sshdr->asc, sshdr->ascq); |
| 2887 | } |
| 2888 | |
| 2889 | static void sd_print_result(struct scsi_disk *sdkp, int result) |
| 2890 | { |
David Miller | 2e4c332 | 2010-08-31 13:35:31 -0700 | [diff] [blame] | 2891 | sd_printk(KERN_INFO, sdkp, " "); |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 2892 | scsi_show_result(result); |
| 2893 | } |
| 2894 | |