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> |
Christoph Hellwig | 924d55b | 2015-10-15 14:10:49 +0200 | [diff] [blame] | 54 | #include <linux/pr.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | #include <asm/uaccess.h> |
Dave Hansen | 8f76d15 | 2009-04-21 16:43:27 -0700 | [diff] [blame] | 56 | #include <asm/unaligned.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | |
| 58 | #include <scsi/scsi.h> |
| 59 | #include <scsi/scsi_cmnd.h> |
| 60 | #include <scsi/scsi_dbg.h> |
| 61 | #include <scsi/scsi_device.h> |
| 62 | #include <scsi/scsi_driver.h> |
| 63 | #include <scsi/scsi_eh.h> |
| 64 | #include <scsi/scsi_host.h> |
| 65 | #include <scsi/scsi_ioctl.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | #include <scsi/scsicam.h> |
| 67 | |
Martin K. Petersen | aa91696 | 2008-06-17 12:47:32 -0400 | [diff] [blame] | 68 | #include "sd.h" |
Dan Williams | a7a20d1 | 2012-03-22 17:05:11 -0700 | [diff] [blame] | 69 | #include "scsi_priv.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | #include "scsi_logging.h" |
| 71 | |
Rene Herman | f018fa5 | 2006-03-08 00:14:20 -0800 | [diff] [blame] | 72 | MODULE_AUTHOR("Eric Youngdale"); |
| 73 | MODULE_DESCRIPTION("SCSI disk (sd) driver"); |
| 74 | MODULE_LICENSE("GPL"); |
| 75 | |
| 76 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK0_MAJOR); |
| 77 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK1_MAJOR); |
| 78 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK2_MAJOR); |
| 79 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK3_MAJOR); |
| 80 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK4_MAJOR); |
| 81 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK5_MAJOR); |
| 82 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK6_MAJOR); |
| 83 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK7_MAJOR); |
| 84 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK8_MAJOR); |
| 85 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK9_MAJOR); |
| 86 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK10_MAJOR); |
| 87 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK11_MAJOR); |
| 88 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK12_MAJOR); |
| 89 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK13_MAJOR); |
| 90 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK14_MAJOR); |
| 91 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK15_MAJOR); |
Michael Tokarev | d7b8bcb | 2006-10-27 16:02:37 +0400 | [diff] [blame] | 92 | MODULE_ALIAS_SCSI_DEVICE(TYPE_DISK); |
| 93 | MODULE_ALIAS_SCSI_DEVICE(TYPE_MOD); |
| 94 | MODULE_ALIAS_SCSI_DEVICE(TYPE_RBC); |
Rene Herman | f018fa5 | 2006-03-08 00:14:20 -0800 | [diff] [blame] | 95 | |
Tejun Heo | 870d665 | 2008-08-25 19:47:25 +0900 | [diff] [blame] | 96 | #if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT) |
Tejun Heo | f615b48 | 2008-08-25 19:47:24 +0900 | [diff] [blame] | 97 | #define SD_MINORS 16 |
Tejun Heo | 870d665 | 2008-08-25 19:47:25 +0900 | [diff] [blame] | 98 | #else |
Tejun Heo | 3e1a7ff | 2008-08-25 19:56:17 +0900 | [diff] [blame] | 99 | #define SD_MINORS 0 |
Tejun Heo | 870d665 | 2008-08-25 19:47:25 +0900 | [diff] [blame] | 100 | #endif |
| 101 | |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 102 | static void sd_config_discard(struct scsi_disk *, unsigned int); |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 103 | static void sd_config_write_same(struct scsi_disk *); |
Linus Torvalds | 7b3d954 | 2008-01-06 10:17:12 -0800 | [diff] [blame] | 104 | static int sd_revalidate_disk(struct gendisk *); |
Tejun Heo | 72ec24b | 2010-05-15 20:09:32 +0200 | [diff] [blame] | 105 | static void sd_unlock_native_capacity(struct gendisk *disk); |
Linus Torvalds | 7b3d954 | 2008-01-06 10:17:12 -0800 | [diff] [blame] | 106 | static int sd_probe(struct device *); |
| 107 | static int sd_remove(struct device *); |
| 108 | static void sd_shutdown(struct device *); |
Oliver Neukum | 9589791 | 2013-09-16 13:28:15 +0200 | [diff] [blame] | 109 | static int sd_suspend_system(struct device *); |
| 110 | static int sd_suspend_runtime(struct device *); |
Linus Torvalds | 7b3d954 | 2008-01-06 10:17:12 -0800 | [diff] [blame] | 111 | static int sd_resume(struct device *); |
| 112 | static void sd_rescan(struct device *); |
Christoph Hellwig | a1b73fc | 2014-05-01 16:51:04 +0200 | [diff] [blame] | 113 | static int sd_init_command(struct scsi_cmnd *SCpnt); |
| 114 | static void sd_uninit_command(struct scsi_cmnd *SCpnt); |
Linus Torvalds | 7b3d954 | 2008-01-06 10:17:12 -0800 | [diff] [blame] | 115 | static int sd_done(struct scsi_cmnd *); |
James Bottomley | 2451079 | 2013-11-11 13:44:53 +0100 | [diff] [blame] | 116 | static int sd_eh_action(struct scsi_cmnd *, int); |
Linus Torvalds | 7b3d954 | 2008-01-06 10:17:12 -0800 | [diff] [blame] | 117 | static void sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer); |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 118 | static void scsi_disk_release(struct device *cdev); |
Linus Torvalds | 7b3d954 | 2008-01-06 10:17:12 -0800 | [diff] [blame] | 119 | static void sd_print_sense_hdr(struct scsi_disk *, struct scsi_sense_hdr *); |
Hannes Reinecke | ef61329 | 2014-10-24 14:27:00 +0200 | [diff] [blame] | 120 | static void sd_print_result(const struct scsi_disk *, const char *, int); |
Linus Torvalds | 7b3d954 | 2008-01-06 10:17:12 -0800 | [diff] [blame] | 121 | |
Tejun Heo | 4034cc6 | 2009-02-21 11:04:45 +0900 | [diff] [blame] | 122 | static DEFINE_SPINLOCK(sd_index_lock); |
Tejun Heo | f27bac2 | 2008-07-14 14:59:30 +0900 | [diff] [blame] | 123 | static DEFINE_IDA(sd_index_ida); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | |
| 125 | /* This semaphore is used to mediate the 0->1 reference get in the |
| 126 | * face of object destruction (i.e. we can't allow a get on an |
| 127 | * object after last put) */ |
Arjan van de Ven | 0b95067 | 2006-01-11 13:16:10 +0100 | [diff] [blame] | 128 | static DEFINE_MUTEX(sd_ref_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | |
H Hartley Sweeten | 439d77f | 2010-08-10 18:01:20 -0700 | [diff] [blame] | 130 | static struct kmem_cache *sd_cdb_cache; |
| 131 | static mempool_t *sd_cdb_pool; |
Martin K. Petersen | 4e7392e | 2009-09-20 16:49:38 -0400 | [diff] [blame] | 132 | |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 133 | static const char *sd_cache_types[] = { |
| 134 | "write through", "none", "write back", |
| 135 | "write back, no read (daft)" |
| 136 | }; |
| 137 | |
Vaughan Cao | cb2fb68 | 2014-06-03 17:37:30 +0800 | [diff] [blame] | 138 | static void sd_set_flush_flag(struct scsi_disk *sdkp) |
| 139 | { |
| 140 | unsigned flush = 0; |
| 141 | |
| 142 | if (sdkp->WCE) { |
| 143 | flush |= REQ_FLUSH; |
| 144 | if (sdkp->DPOFUA) |
| 145 | flush |= REQ_FUA; |
| 146 | } |
| 147 | |
| 148 | blk_queue_flush(sdkp->disk->queue, flush); |
| 149 | } |
| 150 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 151 | static ssize_t |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 152 | cache_type_store(struct device *dev, struct device_attribute *attr, |
| 153 | const char *buf, size_t count) |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 154 | { |
| 155 | int i, ct = -1, rcd, wce, sp; |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 156 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 157 | struct scsi_device *sdp = sdkp->device; |
| 158 | char buffer[64]; |
| 159 | char *buffer_data; |
| 160 | struct scsi_mode_data data; |
| 161 | struct scsi_sense_hdr sshdr; |
Ben Hutchings | 2ee3e26 | 2013-05-27 19:07:19 +0100 | [diff] [blame] | 162 | static const char temp[] = "temporary "; |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 163 | int len; |
| 164 | |
| 165 | if (sdp->type != TYPE_DISK) |
| 166 | /* no cache control on RBC devices; theoretically they |
| 167 | * can do it, but there's probably so many exceptions |
| 168 | * it's not worth the risk */ |
| 169 | return -EINVAL; |
| 170 | |
James Bottomley | 39c60a0 | 2013-04-24 14:02:53 -0700 | [diff] [blame] | 171 | if (strncmp(buf, temp, sizeof(temp) - 1) == 0) { |
| 172 | buf += sizeof(temp) - 1; |
| 173 | sdkp->cache_override = 1; |
| 174 | } else { |
| 175 | sdkp->cache_override = 0; |
| 176 | } |
| 177 | |
Tobias Klauser | 6391a11 | 2006-06-08 22:23:48 -0700 | [diff] [blame] | 178 | for (i = 0; i < ARRAY_SIZE(sd_cache_types); i++) { |
H Hartley Sweeten | 439d77f | 2010-08-10 18:01:20 -0700 | [diff] [blame] | 179 | len = strlen(sd_cache_types[i]); |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 180 | if (strncmp(sd_cache_types[i], buf, len) == 0 && |
| 181 | buf[len] == '\n') { |
| 182 | ct = i; |
| 183 | break; |
| 184 | } |
| 185 | } |
| 186 | if (ct < 0) |
| 187 | return -EINVAL; |
| 188 | rcd = ct & 0x01 ? 1 : 0; |
Sujit Reddy Thumma | 2eefd57 | 2014-08-11 15:40:37 +0300 | [diff] [blame] | 189 | wce = (ct & 0x02) && !sdkp->write_prot ? 1 : 0; |
James Bottomley | 39c60a0 | 2013-04-24 14:02:53 -0700 | [diff] [blame] | 190 | |
| 191 | if (sdkp->cache_override) { |
| 192 | sdkp->WCE = wce; |
| 193 | sdkp->RCD = rcd; |
Vaughan Cao | cb2fb68 | 2014-06-03 17:37:30 +0800 | [diff] [blame] | 194 | sd_set_flush_flag(sdkp); |
James Bottomley | 39c60a0 | 2013-04-24 14:02:53 -0700 | [diff] [blame] | 195 | return count; |
| 196 | } |
| 197 | |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 198 | if (scsi_mode_sense(sdp, 0x08, 8, buffer, sizeof(buffer), SD_TIMEOUT, |
| 199 | SD_MAX_RETRIES, &data, NULL)) |
| 200 | return -EINVAL; |
Andrew Morton | a9312fb | 2006-03-25 03:08:30 -0800 | [diff] [blame] | 201 | len = min_t(size_t, sizeof(buffer), data.length - data.header_length - |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 202 | data.block_descriptor_length); |
| 203 | buffer_data = buffer + data.header_length + |
| 204 | data.block_descriptor_length; |
| 205 | buffer_data[2] &= ~0x05; |
| 206 | buffer_data[2] |= wce << 2 | rcd; |
| 207 | sp = buffer_data[0] & 0x80 ? 1 : 0; |
Gabriel Krisman Bertazi | 2c5d16d | 2015-10-30 16:04:43 -0200 | [diff] [blame] | 208 | buffer_data[0] &= ~0x80; |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 209 | |
| 210 | if (scsi_mode_select(sdp, 1, sp, 8, buffer_data, len, SD_TIMEOUT, |
| 211 | SD_MAX_RETRIES, &data, &sshdr)) { |
| 212 | if (scsi_sense_valid(&sshdr)) |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 213 | sd_print_sense_hdr(sdkp, &sshdr); |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 214 | return -EINVAL; |
| 215 | } |
Andrew Patterson | f98a8ca | 2008-09-04 14:27:35 -0600 | [diff] [blame] | 216 | revalidate_disk(sdkp->disk); |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 217 | return count; |
| 218 | } |
| 219 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 220 | static ssize_t |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 221 | manage_start_stop_show(struct device *dev, struct device_attribute *attr, |
| 222 | char *buf) |
| 223 | { |
| 224 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
| 225 | struct scsi_device *sdp = sdkp->device; |
| 226 | |
| 227 | return snprintf(buf, 20, "%u\n", sdp->manage_start_stop); |
| 228 | } |
| 229 | |
| 230 | static ssize_t |
| 231 | manage_start_stop_store(struct device *dev, struct device_attribute *attr, |
| 232 | const char *buf, size_t count) |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 233 | { |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 234 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 235 | struct scsi_device *sdp = sdkp->device; |
| 236 | |
| 237 | if (!capable(CAP_SYS_ADMIN)) |
| 238 | return -EACCES; |
| 239 | |
| 240 | sdp->manage_start_stop = simple_strtoul(buf, NULL, 10); |
| 241 | |
| 242 | return count; |
| 243 | } |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 244 | static DEVICE_ATTR_RW(manage_start_stop); |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 245 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 246 | static ssize_t |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 247 | allow_restart_show(struct device *dev, struct device_attribute *attr, char *buf) |
| 248 | { |
| 249 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
| 250 | |
| 251 | return snprintf(buf, 40, "%d\n", sdkp->device->allow_restart); |
| 252 | } |
| 253 | |
| 254 | static ssize_t |
| 255 | allow_restart_store(struct device *dev, struct device_attribute *attr, |
| 256 | const char *buf, size_t count) |
Brian King | a144c5a | 2006-06-27 11:10:31 -0500 | [diff] [blame] | 257 | { |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 258 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
Brian King | a144c5a | 2006-06-27 11:10:31 -0500 | [diff] [blame] | 259 | struct scsi_device *sdp = sdkp->device; |
| 260 | |
| 261 | if (!capable(CAP_SYS_ADMIN)) |
| 262 | return -EACCES; |
| 263 | |
| 264 | if (sdp->type != TYPE_DISK) |
| 265 | return -EINVAL; |
| 266 | |
| 267 | sdp->allow_restart = simple_strtoul(buf, NULL, 10); |
| 268 | |
| 269 | return count; |
| 270 | } |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 271 | static DEVICE_ATTR_RW(allow_restart); |
Brian King | a144c5a | 2006-06-27 11:10:31 -0500 | [diff] [blame] | 272 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 273 | static ssize_t |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 274 | cache_type_show(struct device *dev, struct device_attribute *attr, char *buf) |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 275 | { |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 276 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 277 | int ct = sdkp->RCD + 2*sdkp->WCE; |
| 278 | |
| 279 | return snprintf(buf, 40, "%s\n", sd_cache_types[ct]); |
| 280 | } |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 281 | static DEVICE_ATTR_RW(cache_type); |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 282 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 283 | static ssize_t |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 284 | FUA_show(struct device *dev, struct device_attribute *attr, char *buf) |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 285 | { |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 286 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 287 | |
| 288 | return snprintf(buf, 20, "%u\n", sdkp->DPOFUA); |
| 289 | } |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 290 | static DEVICE_ATTR_RO(FUA); |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 291 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 292 | static ssize_t |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 293 | protection_type_show(struct device *dev, struct device_attribute *attr, |
| 294 | char *buf) |
Martin K. Petersen | e0597d7 | 2008-07-17 04:28:34 -0400 | [diff] [blame] | 295 | { |
| 296 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
| 297 | |
| 298 | return snprintf(buf, 20, "%u\n", sdkp->protection_type); |
| 299 | } |
| 300 | |
| 301 | static ssize_t |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 302 | protection_type_store(struct device *dev, struct device_attribute *attr, |
| 303 | const char *buf, size_t count) |
Martin K. Petersen | 8172499 | 2012-08-28 14:29:34 -0400 | [diff] [blame] | 304 | { |
| 305 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
| 306 | unsigned int val; |
| 307 | int err; |
| 308 | |
| 309 | if (!capable(CAP_SYS_ADMIN)) |
| 310 | return -EACCES; |
| 311 | |
| 312 | err = kstrtouint(buf, 10, &val); |
| 313 | |
| 314 | if (err) |
| 315 | return err; |
| 316 | |
| 317 | if (val >= 0 && val <= SD_DIF_TYPE3_PROTECTION) |
| 318 | sdkp->protection_type = val; |
| 319 | |
| 320 | return count; |
| 321 | } |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 322 | static DEVICE_ATTR_RW(protection_type); |
Martin K. Petersen | 8172499 | 2012-08-28 14:29:34 -0400 | [diff] [blame] | 323 | |
| 324 | static ssize_t |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 325 | protection_mode_show(struct device *dev, struct device_attribute *attr, |
| 326 | char *buf) |
Martin K. Petersen | 518fa8e | 2010-10-08 01:36:24 -0400 | [diff] [blame] | 327 | { |
| 328 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
| 329 | struct scsi_device *sdp = sdkp->device; |
| 330 | unsigned int dif, dix; |
| 331 | |
| 332 | dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type); |
| 333 | dix = scsi_host_dix_capable(sdp->host, sdkp->protection_type); |
| 334 | |
| 335 | if (!dix && scsi_host_dix_capable(sdp->host, SD_DIF_TYPE0_PROTECTION)) { |
| 336 | dif = 0; |
| 337 | dix = 1; |
| 338 | } |
| 339 | |
| 340 | if (!dif && !dix) |
| 341 | return snprintf(buf, 20, "none\n"); |
| 342 | |
| 343 | return snprintf(buf, 20, "%s%u\n", dix ? "dix" : "dif", dif); |
| 344 | } |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 345 | static DEVICE_ATTR_RO(protection_mode); |
Martin K. Petersen | 518fa8e | 2010-10-08 01:36:24 -0400 | [diff] [blame] | 346 | |
| 347 | static ssize_t |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 348 | app_tag_own_show(struct device *dev, struct device_attribute *attr, char *buf) |
Martin K. Petersen | e0597d7 | 2008-07-17 04:28:34 -0400 | [diff] [blame] | 349 | { |
| 350 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
| 351 | |
| 352 | return snprintf(buf, 20, "%u\n", sdkp->ATO); |
| 353 | } |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 354 | static DEVICE_ATTR_RO(app_tag_own); |
Martin K. Petersen | e0597d7 | 2008-07-17 04:28:34 -0400 | [diff] [blame] | 355 | |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 356 | static ssize_t |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 357 | thin_provisioning_show(struct device *dev, struct device_attribute *attr, |
| 358 | char *buf) |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 359 | { |
| 360 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
| 361 | |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 362 | return snprintf(buf, 20, "%u\n", sdkp->lbpme); |
| 363 | } |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 364 | static DEVICE_ATTR_RO(thin_provisioning); |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 365 | |
| 366 | static const char *lbp_mode[] = { |
| 367 | [SD_LBP_FULL] = "full", |
| 368 | [SD_LBP_UNMAP] = "unmap", |
| 369 | [SD_LBP_WS16] = "writesame_16", |
| 370 | [SD_LBP_WS10] = "writesame_10", |
| 371 | [SD_LBP_ZERO] = "writesame_zero", |
| 372 | [SD_LBP_DISABLE] = "disabled", |
| 373 | }; |
| 374 | |
| 375 | static ssize_t |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 376 | provisioning_mode_show(struct device *dev, struct device_attribute *attr, |
| 377 | char *buf) |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 378 | { |
| 379 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
| 380 | |
| 381 | return snprintf(buf, 20, "%s\n", lbp_mode[sdkp->provisioning_mode]); |
| 382 | } |
| 383 | |
| 384 | static ssize_t |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 385 | provisioning_mode_store(struct device *dev, struct device_attribute *attr, |
| 386 | const char *buf, size_t count) |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 387 | { |
| 388 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
| 389 | struct scsi_device *sdp = sdkp->device; |
| 390 | |
| 391 | if (!capable(CAP_SYS_ADMIN)) |
| 392 | return -EACCES; |
| 393 | |
| 394 | if (sdp->type != TYPE_DISK) |
| 395 | return -EINVAL; |
| 396 | |
| 397 | if (!strncmp(buf, lbp_mode[SD_LBP_UNMAP], 20)) |
| 398 | sd_config_discard(sdkp, SD_LBP_UNMAP); |
| 399 | else if (!strncmp(buf, lbp_mode[SD_LBP_WS16], 20)) |
| 400 | sd_config_discard(sdkp, SD_LBP_WS16); |
| 401 | else if (!strncmp(buf, lbp_mode[SD_LBP_WS10], 20)) |
| 402 | sd_config_discard(sdkp, SD_LBP_WS10); |
| 403 | else if (!strncmp(buf, lbp_mode[SD_LBP_ZERO], 20)) |
| 404 | sd_config_discard(sdkp, SD_LBP_ZERO); |
| 405 | else if (!strncmp(buf, lbp_mode[SD_LBP_DISABLE], 20)) |
| 406 | sd_config_discard(sdkp, SD_LBP_DISABLE); |
| 407 | else |
| 408 | return -EINVAL; |
| 409 | |
| 410 | return count; |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 411 | } |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 412 | static DEVICE_ATTR_RW(provisioning_mode); |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 413 | |
Martin K. Petersen | 18a4d0a | 2012-02-09 13:48:53 -0500 | [diff] [blame] | 414 | static ssize_t |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 415 | max_medium_access_timeouts_show(struct device *dev, |
| 416 | struct device_attribute *attr, char *buf) |
Martin K. Petersen | 18a4d0a | 2012-02-09 13:48:53 -0500 | [diff] [blame] | 417 | { |
| 418 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
| 419 | |
| 420 | return snprintf(buf, 20, "%u\n", sdkp->max_medium_access_timeouts); |
| 421 | } |
| 422 | |
| 423 | static ssize_t |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 424 | max_medium_access_timeouts_store(struct device *dev, |
| 425 | struct device_attribute *attr, const char *buf, |
| 426 | size_t count) |
Martin K. Petersen | 18a4d0a | 2012-02-09 13:48:53 -0500 | [diff] [blame] | 427 | { |
| 428 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
| 429 | int err; |
| 430 | |
| 431 | if (!capable(CAP_SYS_ADMIN)) |
| 432 | return -EACCES; |
| 433 | |
| 434 | err = kstrtouint(buf, 10, &sdkp->max_medium_access_timeouts); |
| 435 | |
| 436 | return err ? err : count; |
| 437 | } |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 438 | static DEVICE_ATTR_RW(max_medium_access_timeouts); |
Martin K. Petersen | 18a4d0a | 2012-02-09 13:48:53 -0500 | [diff] [blame] | 439 | |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 440 | static ssize_t |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 441 | max_write_same_blocks_show(struct device *dev, struct device_attribute *attr, |
| 442 | char *buf) |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 443 | { |
| 444 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
| 445 | |
| 446 | return snprintf(buf, 20, "%u\n", sdkp->max_ws_blocks); |
| 447 | } |
| 448 | |
| 449 | static ssize_t |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 450 | max_write_same_blocks_store(struct device *dev, struct device_attribute *attr, |
| 451 | const char *buf, size_t count) |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 452 | { |
| 453 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
| 454 | struct scsi_device *sdp = sdkp->device; |
| 455 | unsigned long max; |
| 456 | int err; |
| 457 | |
| 458 | if (!capable(CAP_SYS_ADMIN)) |
| 459 | return -EACCES; |
| 460 | |
| 461 | if (sdp->type != TYPE_DISK) |
| 462 | return -EINVAL; |
| 463 | |
| 464 | err = kstrtoul(buf, 10, &max); |
| 465 | |
| 466 | if (err) |
| 467 | return err; |
| 468 | |
| 469 | if (max == 0) |
| 470 | sdp->no_write_same = 1; |
Martin K. Petersen | 66c28f9 | 2013-06-06 22:15:55 -0400 | [diff] [blame] | 471 | else if (max <= SD_MAX_WS16_BLOCKS) { |
| 472 | sdp->no_write_same = 0; |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 473 | sdkp->max_ws_blocks = max; |
Martin K. Petersen | 66c28f9 | 2013-06-06 22:15:55 -0400 | [diff] [blame] | 474 | } |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 475 | |
| 476 | sd_config_write_same(sdkp); |
| 477 | |
| 478 | return count; |
| 479 | } |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 480 | static DEVICE_ATTR_RW(max_write_same_blocks); |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 481 | |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 482 | static struct attribute *sd_disk_attrs[] = { |
| 483 | &dev_attr_cache_type.attr, |
| 484 | &dev_attr_FUA.attr, |
| 485 | &dev_attr_allow_restart.attr, |
| 486 | &dev_attr_manage_start_stop.attr, |
| 487 | &dev_attr_protection_type.attr, |
| 488 | &dev_attr_protection_mode.attr, |
| 489 | &dev_attr_app_tag_own.attr, |
| 490 | &dev_attr_thin_provisioning.attr, |
| 491 | &dev_attr_provisioning_mode.attr, |
| 492 | &dev_attr_max_write_same_blocks.attr, |
| 493 | &dev_attr_max_medium_access_timeouts.attr, |
| 494 | NULL, |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 495 | }; |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 496 | ATTRIBUTE_GROUPS(sd_disk); |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 497 | |
| 498 | static struct class sd_disk_class = { |
| 499 | .name = "scsi_disk", |
| 500 | .owner = THIS_MODULE, |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 501 | .dev_release = scsi_disk_release, |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 502 | .dev_groups = sd_disk_groups, |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 503 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | |
Aaron Lu | 691e3d3 | 2012-11-09 15:27:55 +0800 | [diff] [blame] | 505 | static const struct dev_pm_ops sd_pm_ops = { |
Oliver Neukum | 9589791 | 2013-09-16 13:28:15 +0200 | [diff] [blame] | 506 | .suspend = sd_suspend_system, |
Aaron Lu | 691e3d3 | 2012-11-09 15:27:55 +0800 | [diff] [blame] | 507 | .resume = sd_resume, |
Oliver Neukum | 9589791 | 2013-09-16 13:28:15 +0200 | [diff] [blame] | 508 | .poweroff = sd_suspend_system, |
Aaron Lu | 691e3d3 | 2012-11-09 15:27:55 +0800 | [diff] [blame] | 509 | .restore = sd_resume, |
Oliver Neukum | 9589791 | 2013-09-16 13:28:15 +0200 | [diff] [blame] | 510 | .runtime_suspend = sd_suspend_runtime, |
Aaron Lu | 691e3d3 | 2012-11-09 15:27:55 +0800 | [diff] [blame] | 511 | .runtime_resume = sd_resume, |
| 512 | }; |
| 513 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | static struct scsi_driver sd_template = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | .gendrv = { |
| 516 | .name = "sd", |
Christoph Hellwig | 3af6b35 | 2014-11-12 18:34:51 +0100 | [diff] [blame] | 517 | .owner = THIS_MODULE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | .probe = sd_probe, |
| 519 | .remove = sd_remove, |
| 520 | .shutdown = sd_shutdown, |
Aaron Lu | 691e3d3 | 2012-11-09 15:27:55 +0800 | [diff] [blame] | 521 | .pm = &sd_pm_ops, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | }, |
| 523 | .rescan = sd_rescan, |
Christoph Hellwig | a1b73fc | 2014-05-01 16:51:04 +0200 | [diff] [blame] | 524 | .init_command = sd_init_command, |
| 525 | .uninit_command = sd_uninit_command, |
Linus Torvalds | 7b3d954 | 2008-01-06 10:17:12 -0800 | [diff] [blame] | 526 | .done = sd_done, |
Martin K. Petersen | 18a4d0a | 2012-02-09 13:48:53 -0500 | [diff] [blame] | 527 | .eh_action = sd_eh_action, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | }; |
| 529 | |
| 530 | /* |
Hannes Reinecke | 0761df9 | 2013-05-10 11:06:16 +0200 | [diff] [blame] | 531 | * Dummy kobj_map->probe function. |
| 532 | * The default ->probe function will call modprobe, which is |
| 533 | * pointless as this module is already loaded. |
| 534 | */ |
| 535 | static struct kobject *sd_default_probe(dev_t devt, int *partno, void *data) |
| 536 | { |
| 537 | return NULL; |
| 538 | } |
| 539 | |
| 540 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | * Device no to disk mapping: |
| 542 | * |
| 543 | * major disc2 disc p1 |
| 544 | * |............|.............|....|....| <- dev_t |
| 545 | * 31 20 19 8 7 4 3 0 |
| 546 | * |
| 547 | * Inside a major, we have 16k disks, however mapped non- |
| 548 | * contiguously. The first 16 disks are for major0, the next |
| 549 | * ones with major1, ... Disk 256 is for major0 again, disk 272 |
| 550 | * for major1, ... |
| 551 | * As we stay compatible with our numbering scheme, we can reuse |
| 552 | * the well-know SCSI majors 8, 65--71, 136--143. |
| 553 | */ |
| 554 | static int sd_major(int major_idx) |
| 555 | { |
| 556 | switch (major_idx) { |
| 557 | case 0: |
| 558 | return SCSI_DISK0_MAJOR; |
| 559 | case 1 ... 7: |
| 560 | return SCSI_DISK1_MAJOR + major_idx - 1; |
| 561 | case 8 ... 15: |
| 562 | return SCSI_DISK8_MAJOR + major_idx - 8; |
| 563 | default: |
| 564 | BUG(); |
| 565 | return 0; /* shut up gcc */ |
| 566 | } |
| 567 | } |
| 568 | |
Christoph Hellwig | 3d9a1f5 | 2015-02-02 14:01:25 +0100 | [diff] [blame] | 569 | static struct scsi_disk *scsi_disk_get(struct gendisk *disk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | { |
| 571 | struct scsi_disk *sdkp = NULL; |
| 572 | |
Christoph Hellwig | 3d9a1f5 | 2015-02-02 14:01:25 +0100 | [diff] [blame] | 573 | mutex_lock(&sd_ref_mutex); |
| 574 | |
Alan Stern | 39b7f1e | 2005-11-04 14:44:41 -0500 | [diff] [blame] | 575 | if (disk->private_data) { |
| 576 | sdkp = scsi_disk(disk); |
| 577 | if (scsi_device_get(sdkp->device) == 0) |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 578 | get_device(&sdkp->dev); |
Alan Stern | 39b7f1e | 2005-11-04 14:44:41 -0500 | [diff] [blame] | 579 | else |
| 580 | sdkp = NULL; |
| 581 | } |
Arjan van de Ven | 0b95067 | 2006-01-11 13:16:10 +0100 | [diff] [blame] | 582 | mutex_unlock(&sd_ref_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | return sdkp; |
| 584 | } |
| 585 | |
| 586 | static void scsi_disk_put(struct scsi_disk *sdkp) |
| 587 | { |
| 588 | struct scsi_device *sdev = sdkp->device; |
| 589 | |
Arjan van de Ven | 0b95067 | 2006-01-11 13:16:10 +0100 | [diff] [blame] | 590 | mutex_lock(&sd_ref_mutex); |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 591 | put_device(&sdkp->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | scsi_device_put(sdev); |
Arjan van de Ven | 0b95067 | 2006-01-11 13:16:10 +0100 | [diff] [blame] | 593 | mutex_unlock(&sd_ref_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | } |
| 595 | |
Martin K. Petersen | c611529 | 2014-09-26 19:20:08 -0400 | [diff] [blame] | 596 | static unsigned char sd_setup_protect_cmnd(struct scsi_cmnd *scmd, |
| 597 | unsigned int dix, unsigned int dif) |
| 598 | { |
| 599 | struct bio *bio = scmd->request->bio; |
| 600 | unsigned int prot_op = sd_prot_op(rq_data_dir(scmd->request), dix, dif); |
| 601 | unsigned int protect = 0; |
| 602 | |
| 603 | if (dix) { /* DIX Type 0, 1, 2, 3 */ |
| 604 | if (bio_integrity_flagged(bio, BIP_IP_CHECKSUM)) |
| 605 | scmd->prot_flags |= SCSI_PROT_IP_CHECKSUM; |
| 606 | |
| 607 | if (bio_integrity_flagged(bio, BIP_CTRL_NOCHECK) == false) |
| 608 | scmd->prot_flags |= SCSI_PROT_GUARD_CHECK; |
| 609 | } |
| 610 | |
| 611 | if (dif != SD_DIF_TYPE3_PROTECTION) { /* DIX/DIF Type 0, 1, 2 */ |
| 612 | scmd->prot_flags |= SCSI_PROT_REF_INCREMENT; |
| 613 | |
| 614 | if (bio_integrity_flagged(bio, BIP_CTRL_NOCHECK) == false) |
| 615 | scmd->prot_flags |= SCSI_PROT_REF_CHECK; |
| 616 | } |
| 617 | |
| 618 | if (dif) { /* DIX/DIF Type 1, 2, 3 */ |
| 619 | scmd->prot_flags |= SCSI_PROT_TRANSFER_PI; |
| 620 | |
| 621 | if (bio_integrity_flagged(bio, BIP_DISK_NOCHECK)) |
| 622 | protect = 3 << 5; /* Disable target PI checking */ |
| 623 | else |
| 624 | protect = 1 << 5; /* Enable target PI checking */ |
Martin K. Petersen | 35e1a5d | 2009-09-18 17:33:00 -0400 | [diff] [blame] | 625 | } |
| 626 | |
| 627 | scsi_set_prot_op(scmd, prot_op); |
| 628 | scsi_set_prot_type(scmd, dif); |
Martin K. Petersen | c611529 | 2014-09-26 19:20:08 -0400 | [diff] [blame] | 629 | scmd->prot_flags &= sd_prot_flag_mask(prot_op); |
| 630 | |
| 631 | return protect; |
Martin K. Petersen | 35e1a5d | 2009-09-18 17:33:00 -0400 | [diff] [blame] | 632 | } |
| 633 | |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 634 | static void sd_config_discard(struct scsi_disk *sdkp, unsigned int mode) |
| 635 | { |
| 636 | struct request_queue *q = sdkp->disk->queue; |
| 637 | unsigned int logical_block_size = sdkp->device->sector_size; |
| 638 | unsigned int max_blocks = 0; |
| 639 | |
Martin K. Petersen | 7985090 | 2014-11-07 00:08:13 -0500 | [diff] [blame] | 640 | q->limits.discard_zeroes_data = 0; |
Martin K. Petersen | 3977372 | 2015-11-13 16:46:47 -0500 | [diff] [blame] | 641 | |
| 642 | /* |
| 643 | * When LBPRZ is reported, discard alignment and granularity |
| 644 | * must be fixed to the logical block size. Otherwise the block |
| 645 | * layer will drop misaligned portions of the request which can |
| 646 | * lead to data corruption. If LBPRZ is not set, we honor the |
| 647 | * device preference. |
| 648 | */ |
| 649 | if (sdkp->lbprz) { |
| 650 | q->limits.discard_alignment = 0; |
| 651 | q->limits.discard_granularity = 1; |
| 652 | } else { |
| 653 | q->limits.discard_alignment = sdkp->unmap_alignment * |
| 654 | logical_block_size; |
| 655 | q->limits.discard_granularity = |
| 656 | max(sdkp->physical_block_size, |
| 657 | sdkp->unmap_granularity * logical_block_size); |
| 658 | } |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 659 | |
Martin K. Petersen | 8973039 | 2012-02-13 15:39:00 -0500 | [diff] [blame] | 660 | sdkp->provisioning_mode = mode; |
| 661 | |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 662 | switch (mode) { |
| 663 | |
| 664 | case SD_LBP_DISABLE: |
Jens Axboe | 2bb4cd5 | 2015-07-14 08:15:12 -0600 | [diff] [blame] | 665 | blk_queue_max_discard_sectors(q, 0); |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 666 | queue_flag_clear_unlocked(QUEUE_FLAG_DISCARD, q); |
| 667 | return; |
| 668 | |
| 669 | case SD_LBP_UNMAP: |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 670 | max_blocks = min_not_zero(sdkp->max_unmap_blocks, |
| 671 | (u32)SD_MAX_WS16_BLOCKS); |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 672 | break; |
| 673 | |
| 674 | case SD_LBP_WS16: |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 675 | max_blocks = min_not_zero(sdkp->max_ws_blocks, |
| 676 | (u32)SD_MAX_WS16_BLOCKS); |
Martin K. Petersen | 7985090 | 2014-11-07 00:08:13 -0500 | [diff] [blame] | 677 | q->limits.discard_zeroes_data = sdkp->lbprz; |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 678 | break; |
| 679 | |
| 680 | case SD_LBP_WS10: |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 681 | max_blocks = min_not_zero(sdkp->max_ws_blocks, |
| 682 | (u32)SD_MAX_WS10_BLOCKS); |
Martin K. Petersen | 7985090 | 2014-11-07 00:08:13 -0500 | [diff] [blame] | 683 | q->limits.discard_zeroes_data = sdkp->lbprz; |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 684 | break; |
| 685 | |
| 686 | case SD_LBP_ZERO: |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 687 | max_blocks = min_not_zero(sdkp->max_ws_blocks, |
| 688 | (u32)SD_MAX_WS10_BLOCKS); |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 689 | q->limits.discard_zeroes_data = 1; |
| 690 | break; |
| 691 | } |
| 692 | |
Jens Axboe | 2bb4cd5 | 2015-07-14 08:15:12 -0600 | [diff] [blame] | 693 | blk_queue_max_discard_sectors(q, max_blocks * (logical_block_size >> 9)); |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 694 | queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, q); |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 695 | } |
| 696 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 697 | /** |
Martin K. Petersen | 26e85fc | 2012-09-18 12:19:31 -0400 | [diff] [blame] | 698 | * sd_setup_discard_cmnd - unmap blocks on thinly provisioned device |
Christoph Hellwig | 66ac028 | 2010-06-18 16:59:42 +0200 | [diff] [blame] | 699 | * @sdp: scsi device to operate one |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 700 | * @rq: Request to prepare |
| 701 | * |
| 702 | * Will issue either UNMAP or WRITE SAME(16) depending on preference |
| 703 | * indicated by target device. |
| 704 | **/ |
Christoph Hellwig | 6a7b439 | 2014-06-28 12:35:13 +0200 | [diff] [blame] | 705 | static int sd_setup_discard_cmnd(struct scsi_cmnd *cmd) |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 706 | { |
Christoph Hellwig | 6a7b439 | 2014-06-28 12:35:13 +0200 | [diff] [blame] | 707 | struct request *rq = cmd->request; |
| 708 | struct scsi_device *sdp = cmd->device; |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 709 | struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); |
Martin K. Petersen | 26e85fc | 2012-09-18 12:19:31 -0400 | [diff] [blame] | 710 | sector_t sector = blk_rq_pos(rq); |
| 711 | unsigned int nr_sectors = blk_rq_sectors(rq); |
| 712 | unsigned int nr_bytes = blk_rq_bytes(rq); |
Christoph Hellwig | 66ac028 | 2010-06-18 16:59:42 +0200 | [diff] [blame] | 713 | unsigned int len; |
FUJITA Tomonori | f1126e9 | 2010-07-01 19:49:18 +0900 | [diff] [blame] | 714 | int ret; |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 715 | char *buf; |
Christoph Hellwig | 66ac028 | 2010-06-18 16:59:42 +0200 | [diff] [blame] | 716 | struct page *page; |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 717 | |
Martin K. Petersen | 26e85fc | 2012-09-18 12:19:31 -0400 | [diff] [blame] | 718 | sector >>= ilog2(sdp->sector_size) - 9; |
| 719 | nr_sectors >>= ilog2(sdp->sector_size) - 9; |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 720 | |
Christoph Hellwig | 66ac028 | 2010-06-18 16:59:42 +0200 | [diff] [blame] | 721 | page = alloc_page(GFP_ATOMIC | __GFP_ZERO); |
| 722 | if (!page) |
| 723 | return BLKPREP_DEFER; |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 724 | |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 725 | switch (sdkp->provisioning_mode) { |
| 726 | case SD_LBP_UNMAP: |
| 727 | buf = page_address(page); |
Christoph Hellwig | 66ac028 | 2010-06-18 16:59:42 +0200 | [diff] [blame] | 728 | |
Christoph Hellwig | 6a7b439 | 2014-06-28 12:35:13 +0200 | [diff] [blame] | 729 | cmd->cmd_len = 10; |
| 730 | cmd->cmnd[0] = UNMAP; |
| 731 | cmd->cmnd[8] = 24; |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 732 | |
| 733 | put_unaligned_be16(6 + 16, &buf[0]); |
| 734 | put_unaligned_be16(16, &buf[2]); |
| 735 | put_unaligned_be64(sector, &buf[8]); |
Christoph Hellwig | 66ac028 | 2010-06-18 16:59:42 +0200 | [diff] [blame] | 736 | put_unaligned_be32(nr_sectors, &buf[16]); |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 737 | |
Christoph Hellwig | 66ac028 | 2010-06-18 16:59:42 +0200 | [diff] [blame] | 738 | len = 24; |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 739 | break; |
| 740 | |
| 741 | case SD_LBP_WS16: |
Christoph Hellwig | 6a7b439 | 2014-06-28 12:35:13 +0200 | [diff] [blame] | 742 | cmd->cmd_len = 16; |
| 743 | cmd->cmnd[0] = WRITE_SAME_16; |
| 744 | cmd->cmnd[1] = 0x8; /* UNMAP */ |
| 745 | put_unaligned_be64(sector, &cmd->cmnd[2]); |
| 746 | put_unaligned_be32(nr_sectors, &cmd->cmnd[10]); |
Christoph Hellwig | 66ac028 | 2010-06-18 16:59:42 +0200 | [diff] [blame] | 747 | |
| 748 | len = sdkp->device->sector_size; |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 749 | break; |
| 750 | |
| 751 | case SD_LBP_WS10: |
| 752 | case SD_LBP_ZERO: |
Christoph Hellwig | 6a7b439 | 2014-06-28 12:35:13 +0200 | [diff] [blame] | 753 | cmd->cmd_len = 10; |
| 754 | cmd->cmnd[0] = WRITE_SAME; |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 755 | if (sdkp->provisioning_mode == SD_LBP_WS10) |
Christoph Hellwig | 6a7b439 | 2014-06-28 12:35:13 +0200 | [diff] [blame] | 756 | cmd->cmnd[1] = 0x8; /* UNMAP */ |
| 757 | put_unaligned_be32(sector, &cmd->cmnd[2]); |
| 758 | put_unaligned_be16(nr_sectors, &cmd->cmnd[7]); |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 759 | |
| 760 | len = sdkp->device->sector_size; |
| 761 | break; |
| 762 | |
| 763 | default: |
Martin K. Petersen | 09b9cc4 | 2011-03-22 00:27:42 -0400 | [diff] [blame] | 764 | ret = BLKPREP_KILL; |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 765 | goto out; |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 766 | } |
| 767 | |
Jens Axboe | dc4a930 | 2014-04-16 21:37:30 -0600 | [diff] [blame] | 768 | rq->completion_data = page; |
Christoph Hellwig | 6a7b439 | 2014-06-28 12:35:13 +0200 | [diff] [blame] | 769 | rq->timeout = SD_TIMEOUT; |
| 770 | |
| 771 | cmd->transfersize = len; |
Christoph Hellwig | e4200f8 | 2014-06-28 16:18:59 +0200 | [diff] [blame] | 772 | cmd->allowed = SD_MAX_RETRIES; |
Christoph Hellwig | 6a7b439 | 2014-06-28 12:35:13 +0200 | [diff] [blame] | 773 | |
| 774 | /* |
| 775 | * Initially __data_len is set to the amount of data that needs to be |
| 776 | * transferred to the target. This amount depends on whether WRITE SAME |
| 777 | * or UNMAP is being used. After the scatterlist has been mapped by |
| 778 | * scsi_init_io() we set __data_len to the size of the area to be |
| 779 | * discarded on disk. This allows us to report completion on the full |
| 780 | * amount of blocks described by the request. |
| 781 | */ |
Christoph Hellwig | 66ac028 | 2010-06-18 16:59:42 +0200 | [diff] [blame] | 782 | blk_add_request_payload(rq, page, len); |
Christoph Hellwig | 3c356bd | 2014-09-05 18:20:23 -0700 | [diff] [blame] | 783 | ret = scsi_init_io(cmd); |
Martin K. Petersen | 26e85fc | 2012-09-18 12:19:31 -0400 | [diff] [blame] | 784 | rq->__data_len = nr_bytes; |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 785 | |
| 786 | out: |
Jens Axboe | b4f42e2 | 2014-04-10 09:46:28 -0600 | [diff] [blame] | 787 | if (ret != BLKPREP_OK) |
FUJITA Tomonori | 610a634 | 2010-07-08 10:16:17 +0200 | [diff] [blame] | 788 | __free_page(page); |
FUJITA Tomonori | f1126e9 | 2010-07-01 19:49:18 +0900 | [diff] [blame] | 789 | return ret; |
| 790 | } |
| 791 | |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 792 | static void sd_config_write_same(struct scsi_disk *sdkp) |
| 793 | { |
| 794 | struct request_queue *q = sdkp->disk->queue; |
| 795 | unsigned int logical_block_size = sdkp->device->sector_size; |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 796 | |
| 797 | if (sdkp->device->no_write_same) { |
| 798 | sdkp->max_ws_blocks = 0; |
| 799 | goto out; |
| 800 | } |
| 801 | |
| 802 | /* Some devices can not handle block counts above 0xffff despite |
| 803 | * supporting WRITE SAME(16). Consequently we default to 64k |
| 804 | * blocks per I/O unless the device explicitly advertises a |
| 805 | * bigger limit. |
| 806 | */ |
Martin K. Petersen | 66c28f9 | 2013-06-06 22:15:55 -0400 | [diff] [blame] | 807 | if (sdkp->max_ws_blocks > SD_MAX_WS10_BLOCKS) |
| 808 | sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks, |
| 809 | (u32)SD_MAX_WS16_BLOCKS); |
| 810 | else if (sdkp->ws16 || sdkp->ws10 || sdkp->device->no_report_opcodes) |
| 811 | sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks, |
| 812 | (u32)SD_MAX_WS10_BLOCKS); |
| 813 | else { |
| 814 | sdkp->device->no_write_same = 1; |
| 815 | sdkp->max_ws_blocks = 0; |
| 816 | } |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 817 | |
| 818 | out: |
Martin K. Petersen | 66c28f9 | 2013-06-06 22:15:55 -0400 | [diff] [blame] | 819 | blk_queue_max_write_same_sectors(q, sdkp->max_ws_blocks * |
| 820 | (logical_block_size >> 9)); |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 821 | } |
| 822 | |
| 823 | /** |
| 824 | * sd_setup_write_same_cmnd - write the same data to multiple blocks |
Christoph Hellwig | 59b1134 | 2014-06-28 12:22:22 +0200 | [diff] [blame] | 825 | * @cmd: command to prepare |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 826 | * |
| 827 | * Will issue either WRITE SAME(10) or WRITE SAME(16) depending on |
| 828 | * preference indicated by target device. |
| 829 | **/ |
Christoph Hellwig | 59b1134 | 2014-06-28 12:22:22 +0200 | [diff] [blame] | 830 | static int sd_setup_write_same_cmnd(struct scsi_cmnd *cmd) |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 831 | { |
Christoph Hellwig | 59b1134 | 2014-06-28 12:22:22 +0200 | [diff] [blame] | 832 | struct request *rq = cmd->request; |
| 833 | struct scsi_device *sdp = cmd->device; |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 834 | struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); |
| 835 | struct bio *bio = rq->bio; |
| 836 | sector_t sector = blk_rq_pos(rq); |
| 837 | unsigned int nr_sectors = blk_rq_sectors(rq); |
| 838 | unsigned int nr_bytes = blk_rq_bytes(rq); |
| 839 | int ret; |
| 840 | |
| 841 | if (sdkp->device->no_write_same) |
| 842 | return BLKPREP_KILL; |
| 843 | |
Kent Overstreet | a4ad39b1 | 2013-08-07 14:24:32 -0700 | [diff] [blame] | 844 | BUG_ON(bio_offset(bio) || bio_iovec(bio).bv_len != sdp->sector_size); |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 845 | |
| 846 | sector >>= ilog2(sdp->sector_size) - 9; |
| 847 | nr_sectors >>= ilog2(sdp->sector_size) - 9; |
| 848 | |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 849 | rq->timeout = SD_WRITE_SAME_TIMEOUT; |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 850 | |
| 851 | if (sdkp->ws16 || sector > 0xffffffff || nr_sectors > 0xffff) { |
Christoph Hellwig | 59b1134 | 2014-06-28 12:22:22 +0200 | [diff] [blame] | 852 | cmd->cmd_len = 16; |
| 853 | cmd->cmnd[0] = WRITE_SAME_16; |
| 854 | put_unaligned_be64(sector, &cmd->cmnd[2]); |
| 855 | put_unaligned_be32(nr_sectors, &cmd->cmnd[10]); |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 856 | } else { |
Christoph Hellwig | 59b1134 | 2014-06-28 12:22:22 +0200 | [diff] [blame] | 857 | cmd->cmd_len = 10; |
| 858 | cmd->cmnd[0] = WRITE_SAME; |
| 859 | put_unaligned_be32(sector, &cmd->cmnd[2]); |
| 860 | put_unaligned_be16(nr_sectors, &cmd->cmnd[7]); |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 861 | } |
| 862 | |
Christoph Hellwig | 59b1134 | 2014-06-28 12:22:22 +0200 | [diff] [blame] | 863 | cmd->transfersize = sdp->sector_size; |
Christoph Hellwig | a25ee54 | 2014-06-28 12:29:19 +0200 | [diff] [blame] | 864 | cmd->allowed = SD_MAX_RETRIES; |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 865 | |
Christoph Hellwig | 59b1134 | 2014-06-28 12:22:22 +0200 | [diff] [blame] | 866 | /* |
| 867 | * For WRITE_SAME the data transferred in the DATA IN buffer is |
| 868 | * different from the amount of data actually written to the target. |
| 869 | * |
| 870 | * We set up __data_len to the amount of data transferred from the |
| 871 | * DATA IN buffer so that blk_rq_map_sg set up the proper S/G list |
| 872 | * to transfer a single sector of data first, but then reset it to |
| 873 | * the amount of data to be written right after so that the I/O path |
| 874 | * knows how much to actually write. |
| 875 | */ |
| 876 | rq->__data_len = sdp->sector_size; |
Christoph Hellwig | 3c356bd | 2014-09-05 18:20:23 -0700 | [diff] [blame] | 877 | ret = scsi_init_io(cmd); |
Christoph Hellwig | 59b1134 | 2014-06-28 12:22:22 +0200 | [diff] [blame] | 878 | rq->__data_len = nr_bytes; |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 879 | return ret; |
| 880 | } |
| 881 | |
Christoph Hellwig | a118c6c | 2014-06-28 12:08:05 +0200 | [diff] [blame] | 882 | static int sd_setup_flush_cmnd(struct scsi_cmnd *cmd) |
FUJITA Tomonori | 90467c2 | 2010-07-03 17:45:34 +0900 | [diff] [blame] | 883 | { |
Christoph Hellwig | a118c6c | 2014-06-28 12:08:05 +0200 | [diff] [blame] | 884 | struct request *rq = cmd->request; |
FUJITA Tomonori | 90467c2 | 2010-07-03 17:45:34 +0900 | [diff] [blame] | 885 | |
Christoph Hellwig | a118c6c | 2014-06-28 12:08:05 +0200 | [diff] [blame] | 886 | /* flush requests don't perform I/O, zero the S/G table */ |
| 887 | memset(&cmd->sdb, 0, sizeof(cmd->sdb)); |
| 888 | |
| 889 | cmd->cmnd[0] = SYNCHRONIZE_CACHE; |
| 890 | cmd->cmd_len = 10; |
| 891 | cmd->transfersize = 0; |
| 892 | cmd->allowed = SD_MAX_RETRIES; |
| 893 | |
K. Y. Srinivasan | 26b9fd8 | 2014-07-18 17:11:27 +0200 | [diff] [blame] | 894 | rq->timeout = rq->q->rq_timeout * SD_FLUSH_TIMEOUT_MULTIPLIER; |
Christoph Hellwig | a118c6c | 2014-06-28 12:08:05 +0200 | [diff] [blame] | 895 | return BLKPREP_OK; |
FUJITA Tomonori | 90467c2 | 2010-07-03 17:45:34 +0900 | [diff] [blame] | 896 | } |
| 897 | |
Christoph Hellwig | 87949ee | 2014-06-28 12:40:18 +0200 | [diff] [blame] | 898 | static int sd_setup_read_write_cmnd(struct scsi_cmnd *SCpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 899 | { |
Christoph Hellwig | a1b73fc | 2014-05-01 16:51:04 +0200 | [diff] [blame] | 900 | struct request *rq = SCpnt->request; |
| 901 | struct scsi_device *sdp = SCpnt->device; |
Christoph Hellwig | 776b23a | 2006-01-06 18:34:07 +0100 | [diff] [blame] | 902 | struct gendisk *disk = rq->rq_disk; |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 903 | struct scsi_disk *sdkp; |
Tejun Heo | 83096eb | 2009-05-07 22:24:39 +0900 | [diff] [blame] | 904 | sector_t block = blk_rq_pos(rq); |
Linus Torvalds | 1835107 | 2008-08-05 21:42:21 -0700 | [diff] [blame] | 905 | sector_t threshold; |
Tejun Heo | 83096eb | 2009-05-07 22:24:39 +0900 | [diff] [blame] | 906 | unsigned int this_count = blk_rq_sectors(rq); |
Martin K. Petersen | c611529 | 2014-09-26 19:20:08 -0400 | [diff] [blame] | 907 | unsigned int dif, dix; |
| 908 | int ret; |
Martin K. Petersen | 4e7392e | 2009-09-20 16:49:38 -0400 | [diff] [blame] | 909 | unsigned char protect; |
James Bottomley | 7f9a6bc | 2007-08-04 10:06:25 -0500 | [diff] [blame] | 910 | |
Christoph Hellwig | 3c356bd | 2014-09-05 18:20:23 -0700 | [diff] [blame] | 911 | ret = scsi_init_io(SCpnt); |
James Bottomley | 7f9a6bc | 2007-08-04 10:06:25 -0500 | [diff] [blame] | 912 | if (ret != BLKPREP_OK) |
| 913 | goto out; |
| 914 | SCpnt = rq->special; |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 915 | sdkp = scsi_disk(disk); |
James Bottomley | 7f9a6bc | 2007-08-04 10:06:25 -0500 | [diff] [blame] | 916 | |
| 917 | /* from here on until we're complete, any goto out |
| 918 | * is used for a killable error condition */ |
| 919 | ret = BLKPREP_KILL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 920 | |
Christoph Hellwig | a1b73fc | 2014-05-01 16:51:04 +0200 | [diff] [blame] | 921 | SCSI_LOG_HLQUEUE(1, |
| 922 | scmd_printk(KERN_INFO, SCpnt, |
| 923 | "%s: block=%llu, count=%d\n", |
| 924 | __func__, (unsigned long long)block, this_count)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 925 | |
| 926 | if (!sdp || !scsi_device_online(sdp) || |
Tejun Heo | 83096eb | 2009-05-07 22:24:39 +0900 | [diff] [blame] | 927 | block + blk_rq_sectors(rq) > get_capacity(disk)) { |
Martin K. Petersen | fa0d34b | 2007-02-27 22:41:19 -0500 | [diff] [blame] | 928 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
Tejun Heo | 83096eb | 2009-05-07 22:24:39 +0900 | [diff] [blame] | 929 | "Finishing %u sectors\n", |
| 930 | blk_rq_sectors(rq))); |
Martin K. Petersen | fa0d34b | 2007-02-27 22:41:19 -0500 | [diff] [blame] | 931 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
| 932 | "Retry with 0x%p\n", SCpnt)); |
James Bottomley | 7f9a6bc | 2007-08-04 10:06:25 -0500 | [diff] [blame] | 933 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 934 | } |
| 935 | |
| 936 | if (sdp->changed) { |
| 937 | /* |
| 938 | * quietly refuse to do anything to a changed disc until |
| 939 | * the changed bit has been reset |
| 940 | */ |
Alan Stern | 3ff5588 | 2010-09-07 11:44:01 -0400 | [diff] [blame] | 941 | /* 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] | 942 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 943 | } |
James Bottomley | 7f9a6bc | 2007-08-04 10:06:25 -0500 | [diff] [blame] | 944 | |
Hans de Goede | a0899d4 | 2008-01-20 11:12:26 +0100 | [diff] [blame] | 945 | /* |
Linus Torvalds | 1835107 | 2008-08-05 21:42:21 -0700 | [diff] [blame] | 946 | * Some SD card readers can't handle multi-sector accesses which touch |
| 947 | * the last one or two hardware sectors. Split accesses as needed. |
Hans de Goede | a0899d4 | 2008-01-20 11:12:26 +0100 | [diff] [blame] | 948 | */ |
Linus Torvalds | 1835107 | 2008-08-05 21:42:21 -0700 | [diff] [blame] | 949 | threshold = get_capacity(disk) - SD_LAST_BUGGY_SECTORS * |
| 950 | (sdp->sector_size / 512); |
| 951 | |
| 952 | if (unlikely(sdp->last_sector_bug && block + this_count > threshold)) { |
| 953 | if (block < threshold) { |
| 954 | /* Access up to the threshold but not beyond */ |
| 955 | this_count = threshold - block; |
| 956 | } else { |
| 957 | /* Access only a single hardware sector */ |
| 958 | this_count = sdp->sector_size / 512; |
| 959 | } |
| 960 | } |
Hans de Goede | a0899d4 | 2008-01-20 11:12:26 +0100 | [diff] [blame] | 961 | |
Martin K. Petersen | fa0d34b | 2007-02-27 22:41:19 -0500 | [diff] [blame] | 962 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, "block=%llu\n", |
| 963 | (unsigned long long)block)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 964 | |
| 965 | /* |
| 966 | * If we have a 1K hardware sectorsize, prevent access to single |
| 967 | * 512 byte sectors. In theory we could handle this - in fact |
| 968 | * the scsi cdrom driver must be able to handle this because |
| 969 | * we typically use 1K blocksizes, and cdroms typically have |
| 970 | * 2K hardware sectorsizes. Of course, things are simpler |
| 971 | * with the cdrom, since it is read-only. For performance |
| 972 | * reasons, the filesystems should be able to handle this |
| 973 | * and not force the scsi disk driver to use bounce buffers |
| 974 | * for this. |
| 975 | */ |
| 976 | if (sdp->sector_size == 1024) { |
Tejun Heo | 83096eb | 2009-05-07 22:24:39 +0900 | [diff] [blame] | 977 | if ((block & 1) || (blk_rq_sectors(rq) & 1)) { |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 978 | scmd_printk(KERN_ERR, SCpnt, |
| 979 | "Bad block number requested\n"); |
James Bottomley | 7f9a6bc | 2007-08-04 10:06:25 -0500 | [diff] [blame] | 980 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 981 | } else { |
| 982 | block = block >> 1; |
| 983 | this_count = this_count >> 1; |
| 984 | } |
| 985 | } |
| 986 | if (sdp->sector_size == 2048) { |
Tejun Heo | 83096eb | 2009-05-07 22:24:39 +0900 | [diff] [blame] | 987 | if ((block & 3) || (blk_rq_sectors(rq) & 3)) { |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 988 | scmd_printk(KERN_ERR, SCpnt, |
| 989 | "Bad block number requested\n"); |
James Bottomley | 7f9a6bc | 2007-08-04 10:06:25 -0500 | [diff] [blame] | 990 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 991 | } else { |
| 992 | block = block >> 2; |
| 993 | this_count = this_count >> 2; |
| 994 | } |
| 995 | } |
| 996 | if (sdp->sector_size == 4096) { |
Tejun Heo | 83096eb | 2009-05-07 22:24:39 +0900 | [diff] [blame] | 997 | if ((block & 7) || (blk_rq_sectors(rq) & 7)) { |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 998 | scmd_printk(KERN_ERR, SCpnt, |
| 999 | "Bad block number requested\n"); |
James Bottomley | 7f9a6bc | 2007-08-04 10:06:25 -0500 | [diff] [blame] | 1000 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1001 | } else { |
| 1002 | block = block >> 3; |
| 1003 | this_count = this_count >> 3; |
| 1004 | } |
| 1005 | } |
| 1006 | if (rq_data_dir(rq) == WRITE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1007 | SCpnt->cmnd[0] = WRITE_6; |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 1008 | |
Martin K. Petersen | 8c579ab | 2012-08-28 14:29:33 -0400 | [diff] [blame] | 1009 | if (blk_integrity_rq(rq)) |
Martin K. Petersen | c611529 | 2014-09-26 19:20:08 -0400 | [diff] [blame] | 1010 | sd_dif_prepare(SCpnt); |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 1011 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1012 | } else if (rq_data_dir(rq) == READ) { |
| 1013 | SCpnt->cmnd[0] = READ_6; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1014 | } else { |
Jens Axboe | 5953316 | 2013-05-23 12:25:08 +0200 | [diff] [blame] | 1015 | scmd_printk(KERN_ERR, SCpnt, "Unknown command %llx\n", (unsigned long long) rq->cmd_flags); |
James Bottomley | 7f9a6bc | 2007-08-04 10:06:25 -0500 | [diff] [blame] | 1016 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1017 | } |
| 1018 | |
Martin K. Petersen | fa0d34b | 2007-02-27 22:41:19 -0500 | [diff] [blame] | 1019 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
Tejun Heo | 83096eb | 2009-05-07 22:24:39 +0900 | [diff] [blame] | 1020 | "%s %d/%u 512 byte blocks.\n", |
Martin K. Petersen | fa0d34b | 2007-02-27 22:41:19 -0500 | [diff] [blame] | 1021 | (rq_data_dir(rq) == WRITE) ? |
| 1022 | "writing" : "reading", this_count, |
Tejun Heo | 83096eb | 2009-05-07 22:24:39 +0900 | [diff] [blame] | 1023 | blk_rq_sectors(rq))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1024 | |
Martin K. Petersen | c611529 | 2014-09-26 19:20:08 -0400 | [diff] [blame] | 1025 | dix = scsi_prot_sg_count(SCpnt); |
| 1026 | dif = scsi_host_dif_capable(SCpnt->device->host, sdkp->protection_type); |
| 1027 | |
| 1028 | if (dif || dix) |
| 1029 | protect = sd_setup_protect_cmnd(SCpnt, dix, dif); |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 1030 | else |
Martin K. Petersen | 4e7392e | 2009-09-20 16:49:38 -0400 | [diff] [blame] | 1031 | protect = 0; |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 1032 | |
Martin K. Petersen | c611529 | 2014-09-26 19:20:08 -0400 | [diff] [blame] | 1033 | if (protect && sdkp->protection_type == SD_DIF_TYPE2_PROTECTION) { |
Martin K. Petersen | 4e7392e | 2009-09-20 16:49:38 -0400 | [diff] [blame] | 1034 | SCpnt->cmnd = mempool_alloc(sd_cdb_pool, GFP_ATOMIC); |
| 1035 | |
| 1036 | if (unlikely(SCpnt->cmnd == NULL)) { |
| 1037 | ret = BLKPREP_DEFER; |
| 1038 | goto out; |
| 1039 | } |
| 1040 | |
| 1041 | SCpnt->cmd_len = SD_EXT_CDB_SIZE; |
| 1042 | memset(SCpnt->cmnd, 0, SCpnt->cmd_len); |
| 1043 | SCpnt->cmnd[0] = VARIABLE_LENGTH_CMD; |
| 1044 | SCpnt->cmnd[7] = 0x18; |
| 1045 | SCpnt->cmnd[9] = (rq_data_dir(rq) == READ) ? READ_32 : WRITE_32; |
Christoph Hellwig | 33659eb | 2010-08-07 18:17:56 +0200 | [diff] [blame] | 1046 | SCpnt->cmnd[10] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
Martin K. Petersen | 4e7392e | 2009-09-20 16:49:38 -0400 | [diff] [blame] | 1047 | |
| 1048 | /* LBA */ |
| 1049 | SCpnt->cmnd[12] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0; |
| 1050 | SCpnt->cmnd[13] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0; |
| 1051 | SCpnt->cmnd[14] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0; |
| 1052 | SCpnt->cmnd[15] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0; |
| 1053 | SCpnt->cmnd[16] = (unsigned char) (block >> 24) & 0xff; |
| 1054 | SCpnt->cmnd[17] = (unsigned char) (block >> 16) & 0xff; |
| 1055 | SCpnt->cmnd[18] = (unsigned char) (block >> 8) & 0xff; |
| 1056 | SCpnt->cmnd[19] = (unsigned char) block & 0xff; |
| 1057 | |
| 1058 | /* Expected Indirect LBA */ |
| 1059 | SCpnt->cmnd[20] = (unsigned char) (block >> 24) & 0xff; |
| 1060 | SCpnt->cmnd[21] = (unsigned char) (block >> 16) & 0xff; |
| 1061 | SCpnt->cmnd[22] = (unsigned char) (block >> 8) & 0xff; |
| 1062 | SCpnt->cmnd[23] = (unsigned char) block & 0xff; |
| 1063 | |
| 1064 | /* Transfer length */ |
| 1065 | SCpnt->cmnd[28] = (unsigned char) (this_count >> 24) & 0xff; |
| 1066 | SCpnt->cmnd[29] = (unsigned char) (this_count >> 16) & 0xff; |
| 1067 | SCpnt->cmnd[30] = (unsigned char) (this_count >> 8) & 0xff; |
| 1068 | SCpnt->cmnd[31] = (unsigned char) this_count & 0xff; |
Akinobu Mita | e430cbc | 2014-06-02 22:56:47 +0900 | [diff] [blame] | 1069 | } else if (sdp->use_16_for_rw || (this_count > 0xffff)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1070 | SCpnt->cmnd[0] += READ_16 - READ_6; |
Christoph Hellwig | 33659eb | 2010-08-07 18:17:56 +0200 | [diff] [blame] | 1071 | SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1072 | SCpnt->cmnd[2] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0; |
| 1073 | SCpnt->cmnd[3] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0; |
| 1074 | SCpnt->cmnd[4] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0; |
| 1075 | SCpnt->cmnd[5] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0; |
| 1076 | SCpnt->cmnd[6] = (unsigned char) (block >> 24) & 0xff; |
| 1077 | SCpnt->cmnd[7] = (unsigned char) (block >> 16) & 0xff; |
| 1078 | SCpnt->cmnd[8] = (unsigned char) (block >> 8) & 0xff; |
| 1079 | SCpnt->cmnd[9] = (unsigned char) block & 0xff; |
| 1080 | SCpnt->cmnd[10] = (unsigned char) (this_count >> 24) & 0xff; |
| 1081 | SCpnt->cmnd[11] = (unsigned char) (this_count >> 16) & 0xff; |
| 1082 | SCpnt->cmnd[12] = (unsigned char) (this_count >> 8) & 0xff; |
| 1083 | SCpnt->cmnd[13] = (unsigned char) this_count & 0xff; |
| 1084 | SCpnt->cmnd[14] = SCpnt->cmnd[15] = 0; |
| 1085 | } else if ((this_count > 0xff) || (block > 0x1fffff) || |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 1086 | scsi_device_protection(SCpnt->device) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1087 | SCpnt->device->use_10_for_rw) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1088 | SCpnt->cmnd[0] += READ_10 - READ_6; |
Christoph Hellwig | 33659eb | 2010-08-07 18:17:56 +0200 | [diff] [blame] | 1089 | SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1090 | SCpnt->cmnd[2] = (unsigned char) (block >> 24) & 0xff; |
| 1091 | SCpnt->cmnd[3] = (unsigned char) (block >> 16) & 0xff; |
| 1092 | SCpnt->cmnd[4] = (unsigned char) (block >> 8) & 0xff; |
| 1093 | SCpnt->cmnd[5] = (unsigned char) block & 0xff; |
| 1094 | SCpnt->cmnd[6] = SCpnt->cmnd[9] = 0; |
| 1095 | SCpnt->cmnd[7] = (unsigned char) (this_count >> 8) & 0xff; |
| 1096 | SCpnt->cmnd[8] = (unsigned char) this_count & 0xff; |
| 1097 | } else { |
Christoph Hellwig | 33659eb | 2010-08-07 18:17:56 +0200 | [diff] [blame] | 1098 | if (unlikely(rq->cmd_flags & REQ_FUA)) { |
Tejun Heo | 007365a | 2006-01-06 09:53:52 +0100 | [diff] [blame] | 1099 | /* |
| 1100 | * This happens only if this drive failed |
| 1101 | * 10byte rw command with ILLEGAL_REQUEST |
| 1102 | * during operation and thus turned off |
| 1103 | * use_10_for_rw. |
| 1104 | */ |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 1105 | scmd_printk(KERN_ERR, SCpnt, |
| 1106 | "FUA write on READ/WRITE(6) drive\n"); |
James Bottomley | 7f9a6bc | 2007-08-04 10:06:25 -0500 | [diff] [blame] | 1107 | goto out; |
Tejun Heo | 007365a | 2006-01-06 09:53:52 +0100 | [diff] [blame] | 1108 | } |
| 1109 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1110 | SCpnt->cmnd[1] |= (unsigned char) ((block >> 16) & 0x1f); |
| 1111 | SCpnt->cmnd[2] = (unsigned char) ((block >> 8) & 0xff); |
| 1112 | SCpnt->cmnd[3] = (unsigned char) block & 0xff; |
| 1113 | SCpnt->cmnd[4] = (unsigned char) this_count; |
| 1114 | SCpnt->cmnd[5] = 0; |
| 1115 | } |
Boaz Harrosh | 30b0c37 | 2007-12-13 13:47:40 +0200 | [diff] [blame] | 1116 | SCpnt->sdb.length = this_count * sdp->sector_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1117 | |
| 1118 | /* |
| 1119 | * We shouldn't disconnect in the middle of a sector, so with a dumb |
| 1120 | * host adapter, it's safe to assume that we can at least transfer |
| 1121 | * this many bytes between each connect / disconnect. |
| 1122 | */ |
| 1123 | SCpnt->transfersize = sdp->sector_size; |
| 1124 | SCpnt->underflow = this_count << 9; |
| 1125 | SCpnt->allowed = SD_MAX_RETRIES; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1126 | |
| 1127 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1128 | * This indicates that the command is ready from our end to be |
| 1129 | * queued. |
| 1130 | */ |
James Bottomley | 7f9a6bc | 2007-08-04 10:06:25 -0500 | [diff] [blame] | 1131 | ret = BLKPREP_OK; |
| 1132 | out: |
Christoph Hellwig | a1b73fc | 2014-05-01 16:51:04 +0200 | [diff] [blame] | 1133 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1134 | } |
| 1135 | |
Christoph Hellwig | 87949ee | 2014-06-28 12:40:18 +0200 | [diff] [blame] | 1136 | static int sd_init_command(struct scsi_cmnd *cmd) |
| 1137 | { |
| 1138 | struct request *rq = cmd->request; |
| 1139 | |
| 1140 | if (rq->cmd_flags & REQ_DISCARD) |
| 1141 | return sd_setup_discard_cmnd(cmd); |
| 1142 | else if (rq->cmd_flags & REQ_WRITE_SAME) |
| 1143 | return sd_setup_write_same_cmnd(cmd); |
| 1144 | else if (rq->cmd_flags & REQ_FLUSH) |
| 1145 | return sd_setup_flush_cmnd(cmd); |
| 1146 | else |
| 1147 | return sd_setup_read_write_cmnd(cmd); |
| 1148 | } |
| 1149 | |
| 1150 | static void sd_uninit_command(struct scsi_cmnd *SCpnt) |
| 1151 | { |
| 1152 | struct request *rq = SCpnt->request; |
| 1153 | |
| 1154 | if (rq->cmd_flags & REQ_DISCARD) |
| 1155 | __free_page(rq->completion_data); |
| 1156 | |
| 1157 | if (SCpnt->cmnd != rq->cmd) { |
| 1158 | mempool_free(SCpnt->cmnd, sd_cdb_pool); |
| 1159 | SCpnt->cmnd = NULL; |
| 1160 | SCpnt->cmd_len = 0; |
| 1161 | } |
| 1162 | } |
| 1163 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1164 | /** |
| 1165 | * sd_open - open a scsi disk device |
| 1166 | * @inode: only i_rdev member may be used |
| 1167 | * @filp: only f_mode and f_flags may be used |
| 1168 | * |
| 1169 | * Returns 0 if successful. Returns a negated errno value in case |
| 1170 | * of error. |
| 1171 | * |
| 1172 | * Note: This can be called from a user context (e.g. fsck(1) ) |
| 1173 | * or from within the kernel (e.g. as a result of a mount(1) ). |
| 1174 | * In the latter case @inode and @filp carry an abridged amount |
| 1175 | * of information as noted above. |
Arnd Bergmann | 409f349 | 2010-07-07 16:51:29 +0200 | [diff] [blame] | 1176 | * |
| 1177 | * Locking: called with bdev->bd_mutex held. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1178 | **/ |
Al Viro | 0338e29 | 2008-03-02 10:41:04 -0500 | [diff] [blame] | 1179 | static int sd_open(struct block_device *bdev, fmode_t mode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1180 | { |
Al Viro | 0338e29 | 2008-03-02 10:41:04 -0500 | [diff] [blame] | 1181 | struct scsi_disk *sdkp = scsi_disk_get(bdev->bd_disk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1182 | struct scsi_device *sdev; |
| 1183 | int retval; |
| 1184 | |
Al Viro | 0338e29 | 2008-03-02 10:41:04 -0500 | [diff] [blame] | 1185 | if (!sdkp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1186 | return -ENXIO; |
| 1187 | |
Martin K. Petersen | fa0d34b | 2007-02-27 22:41:19 -0500 | [diff] [blame] | 1188 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_open\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1189 | |
| 1190 | sdev = sdkp->device; |
| 1191 | |
| 1192 | /* |
| 1193 | * If the device is in error recovery, wait until it is done. |
| 1194 | * If the device is offline, then disallow any access to it. |
| 1195 | */ |
| 1196 | retval = -ENXIO; |
| 1197 | if (!scsi_block_when_processing_errors(sdev)) |
| 1198 | goto error_out; |
| 1199 | |
| 1200 | if (sdev->removable || sdkp->write_prot) |
Al Viro | 0338e29 | 2008-03-02 10:41:04 -0500 | [diff] [blame] | 1201 | check_disk_change(bdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1202 | |
| 1203 | /* |
| 1204 | * If the drive is empty, just let the open fail. |
| 1205 | */ |
| 1206 | retval = -ENOMEDIUM; |
Al Viro | 0338e29 | 2008-03-02 10:41:04 -0500 | [diff] [blame] | 1207 | if (sdev->removable && !sdkp->media_present && !(mode & FMODE_NDELAY)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1208 | goto error_out; |
| 1209 | |
| 1210 | /* |
| 1211 | * If the device has the write protect tab set, have the open fail |
| 1212 | * if the user expects to be able to write to the thing. |
| 1213 | */ |
| 1214 | retval = -EROFS; |
Al Viro | 0338e29 | 2008-03-02 10:41:04 -0500 | [diff] [blame] | 1215 | if (sdkp->write_prot && (mode & FMODE_WRITE)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1216 | goto error_out; |
| 1217 | |
| 1218 | /* |
| 1219 | * It is possible that the disk changing stuff resulted in |
| 1220 | * the device being taken offline. If this is the case, |
| 1221 | * report this to the user, and don't pretend that the |
| 1222 | * open actually succeeded. |
| 1223 | */ |
| 1224 | retval = -ENXIO; |
| 1225 | if (!scsi_device_online(sdev)) |
| 1226 | goto error_out; |
| 1227 | |
Arnd Bergmann | 409f349 | 2010-07-07 16:51:29 +0200 | [diff] [blame] | 1228 | if ((atomic_inc_return(&sdkp->openers) == 1) && sdev->removable) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1229 | if (scsi_block_when_processing_errors(sdev)) |
| 1230 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT); |
| 1231 | } |
| 1232 | |
| 1233 | return 0; |
| 1234 | |
| 1235 | error_out: |
| 1236 | scsi_disk_put(sdkp); |
| 1237 | return retval; |
| 1238 | } |
| 1239 | |
| 1240 | /** |
| 1241 | * sd_release - invoked when the (last) close(2) is called on this |
| 1242 | * scsi disk. |
| 1243 | * @inode: only i_rdev member may be used |
| 1244 | * @filp: only f_mode and f_flags may be used |
| 1245 | * |
| 1246 | * Returns 0. |
| 1247 | * |
| 1248 | * Note: may block (uninterruptible) if error recovery is underway |
| 1249 | * on this disk. |
Arnd Bergmann | 409f349 | 2010-07-07 16:51:29 +0200 | [diff] [blame] | 1250 | * |
| 1251 | * Locking: called with bdev->bd_mutex held. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1252 | **/ |
Al Viro | db2a144 | 2013-05-05 21:52:57 -0400 | [diff] [blame] | 1253 | static void sd_release(struct gendisk *disk, fmode_t mode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1254 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1255 | struct scsi_disk *sdkp = scsi_disk(disk); |
| 1256 | struct scsi_device *sdev = sdkp->device; |
| 1257 | |
James Bottomley | 56937f7 | 2007-03-11 12:25:33 -0500 | [diff] [blame] | 1258 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_release\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1259 | |
Alan Stern | 7e44331 | 2010-09-07 11:27:52 -0400 | [diff] [blame] | 1260 | if (atomic_dec_return(&sdkp->openers) == 0 && sdev->removable) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1261 | if (scsi_block_when_processing_errors(sdev)) |
| 1262 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW); |
| 1263 | } |
| 1264 | |
| 1265 | /* |
| 1266 | * XXX and what if there are packets in flight and this close() |
| 1267 | * XXX is followed by a "rmmod sd_mod"? |
| 1268 | */ |
Alan Stern | 478a8a0 | 2010-06-16 14:52:17 -0400 | [diff] [blame] | 1269 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1270 | scsi_disk_put(sdkp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1271 | } |
| 1272 | |
Christoph Hellwig | a885c8c | 2006-01-08 01:02:50 -0800 | [diff] [blame] | 1273 | static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1274 | { |
| 1275 | struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk); |
| 1276 | struct scsi_device *sdp = sdkp->device; |
| 1277 | struct Scsi_Host *host = sdp->host; |
| 1278 | int diskinfo[4]; |
| 1279 | |
| 1280 | /* default to most commonly used values */ |
| 1281 | diskinfo[0] = 0x40; /* 1 << 6 */ |
| 1282 | diskinfo[1] = 0x20; /* 1 << 5 */ |
| 1283 | diskinfo[2] = sdkp->capacity >> 11; |
| 1284 | |
| 1285 | /* override with calculated, extended default, or driver values */ |
| 1286 | if (host->hostt->bios_param) |
| 1287 | host->hostt->bios_param(sdp, bdev, sdkp->capacity, diskinfo); |
| 1288 | else |
| 1289 | scsicam_bios_param(bdev, sdkp->capacity, diskinfo); |
| 1290 | |
Christoph Hellwig | a885c8c | 2006-01-08 01:02:50 -0800 | [diff] [blame] | 1291 | geo->heads = diskinfo[0]; |
| 1292 | geo->sectors = diskinfo[1]; |
| 1293 | geo->cylinders = diskinfo[2]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1294 | return 0; |
| 1295 | } |
| 1296 | |
| 1297 | /** |
| 1298 | * sd_ioctl - process an ioctl |
| 1299 | * @inode: only i_rdev/i_bdev members may be used |
| 1300 | * @filp: only f_mode and f_flags may be used |
| 1301 | * @cmd: ioctl command number |
| 1302 | * @arg: this is third argument given to ioctl(2) system call. |
| 1303 | * Often contains a pointer. |
| 1304 | * |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 1305 | * Returns 0 if successful (some ioctls return positive numbers on |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1306 | * success as well). Returns a negated errno value in case of error. |
| 1307 | * |
| 1308 | * 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] | 1309 | * down in the scsi subsystem. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1310 | **/ |
Al Viro | 0338e29 | 2008-03-02 10:41:04 -0500 | [diff] [blame] | 1311 | static int sd_ioctl(struct block_device *bdev, fmode_t mode, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1312 | unsigned int cmd, unsigned long arg) |
| 1313 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1314 | struct gendisk *disk = bdev->bd_disk; |
Nao Nishijima | fe2d185 | 2011-08-25 18:04:14 +0900 | [diff] [blame] | 1315 | struct scsi_disk *sdkp = scsi_disk(disk); |
| 1316 | struct scsi_device *sdp = sdkp->device; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1317 | void __user *p = (void __user *)arg; |
| 1318 | int error; |
| 1319 | |
Nao Nishijima | fe2d185 | 2011-08-25 18:04:14 +0900 | [diff] [blame] | 1320 | SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO, sdkp, "sd_ioctl: disk=%s, " |
| 1321 | "cmd=0x%x\n", disk->disk_name, cmd)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1322 | |
Paolo Bonzini | 0bfc96c | 2012-01-12 16:01:28 +0100 | [diff] [blame] | 1323 | error = scsi_verify_blk_ioctl(bdev, cmd); |
| 1324 | if (error < 0) |
| 1325 | return error; |
| 1326 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1327 | /* |
| 1328 | * If we are in the middle of error recovery, don't let anyone |
| 1329 | * else try and use this device. Also, if error recovery fails, it |
| 1330 | * may try and take the device offline, in which case all further |
| 1331 | * access to the device is prohibited. |
| 1332 | */ |
Christoph Hellwig | 906d15f | 2014-10-11 16:25:31 +0200 | [diff] [blame] | 1333 | error = scsi_ioctl_block_when_processing_errors(sdp, cmd, |
| 1334 | (mode & FMODE_NDELAY) != 0); |
| 1335 | if (error) |
Arnd Bergmann | 8a6cfeb | 2010-07-08 10:18:46 +0200 | [diff] [blame] | 1336 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1337 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1338 | /* |
| 1339 | * Send SCSI addressing ioctls directly to mid level, send other |
| 1340 | * ioctls to block level and then onto mid level if they can't be |
| 1341 | * resolved. |
| 1342 | */ |
| 1343 | switch (cmd) { |
| 1344 | case SCSI_IOCTL_GET_IDLUN: |
| 1345 | case SCSI_IOCTL_GET_BUS_NUMBER: |
Arnd Bergmann | 8a6cfeb | 2010-07-08 10:18:46 +0200 | [diff] [blame] | 1346 | error = scsi_ioctl(sdp, cmd, p); |
| 1347 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1348 | default: |
Paolo Bonzini | 577ebb3 | 2012-01-12 16:01:27 +0100 | [diff] [blame] | 1349 | error = scsi_cmd_blk_ioctl(bdev, mode, cmd, p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1350 | if (error != -ENOTTY) |
Arnd Bergmann | 8a6cfeb | 2010-07-08 10:18:46 +0200 | [diff] [blame] | 1351 | break; |
| 1352 | error = scsi_ioctl(sdp, cmd, p); |
| 1353 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1354 | } |
Arnd Bergmann | 8a6cfeb | 2010-07-08 10:18:46 +0200 | [diff] [blame] | 1355 | out: |
Arnd Bergmann | 8a6cfeb | 2010-07-08 10:18:46 +0200 | [diff] [blame] | 1356 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1357 | } |
| 1358 | |
| 1359 | static void set_media_not_present(struct scsi_disk *sdkp) |
| 1360 | { |
Tejun Heo | 2bae009 | 2010-12-18 18:42:23 +0100 | [diff] [blame] | 1361 | if (sdkp->media_present) |
| 1362 | sdkp->device->changed = 1; |
| 1363 | |
| 1364 | if (sdkp->device->removable) { |
| 1365 | sdkp->media_present = 0; |
| 1366 | sdkp->capacity = 0; |
| 1367 | } |
| 1368 | } |
| 1369 | |
| 1370 | static int media_not_present(struct scsi_disk *sdkp, |
| 1371 | struct scsi_sense_hdr *sshdr) |
| 1372 | { |
| 1373 | if (!scsi_sense_valid(sshdr)) |
| 1374 | return 0; |
| 1375 | |
| 1376 | /* not invoked for commands that could return deferred errors */ |
| 1377 | switch (sshdr->sense_key) { |
| 1378 | case UNIT_ATTENTION: |
| 1379 | case NOT_READY: |
| 1380 | /* medium not present */ |
| 1381 | if (sshdr->asc == 0x3A) { |
| 1382 | set_media_not_present(sdkp); |
| 1383 | return 1; |
| 1384 | } |
| 1385 | } |
| 1386 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1387 | } |
| 1388 | |
| 1389 | /** |
Tejun Heo | 2bae009 | 2010-12-18 18:42:23 +0100 | [diff] [blame] | 1390 | * sd_check_events - check media events |
| 1391 | * @disk: kernel device descriptor |
| 1392 | * @clearing: disk events currently being cleared |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1393 | * |
Tejun Heo | 2bae009 | 2010-12-18 18:42:23 +0100 | [diff] [blame] | 1394 | * Returns mask of DISK_EVENT_*. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1395 | * |
| 1396 | * Note: this function is invoked from the block subsystem. |
| 1397 | **/ |
Tejun Heo | 2bae009 | 2010-12-18 18:42:23 +0100 | [diff] [blame] | 1398 | static unsigned int sd_check_events(struct gendisk *disk, unsigned int clearing) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1399 | { |
| 1400 | struct scsi_disk *sdkp = scsi_disk(disk); |
| 1401 | struct scsi_device *sdp = sdkp->device; |
James Bottomley | 001aac2 | 2007-12-02 19:10:40 +0200 | [diff] [blame] | 1402 | struct scsi_sense_hdr *sshdr = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1403 | int retval; |
| 1404 | |
Tejun Heo | 2bae009 | 2010-12-18 18:42:23 +0100 | [diff] [blame] | 1405 | 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] | 1406 | |
| 1407 | /* |
| 1408 | * If the device is offline, don't send any commands - just pretend as |
| 1409 | * if the command failed. If the device ever comes back online, we |
| 1410 | * can deal with it then. It is only because of unrecoverable errors |
| 1411 | * that we would ever take a device offline in the first place. |
| 1412 | */ |
Kay Sievers | 285e967 | 2007-08-14 14:10:39 +0200 | [diff] [blame] | 1413 | if (!scsi_device_online(sdp)) { |
| 1414 | set_media_not_present(sdkp); |
Kay Sievers | 285e967 | 2007-08-14 14:10:39 +0200 | [diff] [blame] | 1415 | goto out; |
| 1416 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1417 | |
| 1418 | /* |
| 1419 | * Using TEST_UNIT_READY enables differentiation between drive with |
| 1420 | * no cartridge loaded - NOT READY, drive with changed cartridge - |
| 1421 | * UNIT ATTENTION, or with same cartridge - GOOD STATUS. |
| 1422 | * |
| 1423 | * Drives that auto spin down. eg iomega jaz 1G, will be started |
| 1424 | * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever |
| 1425 | * sd_revalidate() is called. |
| 1426 | */ |
| 1427 | retval = -ENODEV; |
Kay Sievers | 285e967 | 2007-08-14 14:10:39 +0200 | [diff] [blame] | 1428 | |
James Bottomley | 001aac2 | 2007-12-02 19:10:40 +0200 | [diff] [blame] | 1429 | if (scsi_block_when_processing_errors(sdp)) { |
| 1430 | sshdr = kzalloc(sizeof(*sshdr), GFP_KERNEL); |
| 1431 | retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, SD_MAX_RETRIES, |
| 1432 | sshdr); |
| 1433 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1434 | |
Tejun Heo | 2bae009 | 2010-12-18 18:42:23 +0100 | [diff] [blame] | 1435 | /* failed to execute TUR, assume media not present */ |
| 1436 | if (host_byte(retval)) { |
Kay Sievers | 285e967 | 2007-08-14 14:10:39 +0200 | [diff] [blame] | 1437 | set_media_not_present(sdkp); |
Kay Sievers | 285e967 | 2007-08-14 14:10:39 +0200 | [diff] [blame] | 1438 | goto out; |
| 1439 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1440 | |
Tejun Heo | 2bae009 | 2010-12-18 18:42:23 +0100 | [diff] [blame] | 1441 | if (media_not_present(sdkp, sshdr)) |
| 1442 | goto out; |
| 1443 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1444 | /* |
| 1445 | * For removable scsi disk we have to recognise the presence |
Tejun Heo | 2bae009 | 2010-12-18 18:42:23 +0100 | [diff] [blame] | 1446 | * of a disk in the drive. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1447 | */ |
Tejun Heo | 2bae009 | 2010-12-18 18:42:23 +0100 | [diff] [blame] | 1448 | if (!sdkp->media_present) |
| 1449 | sdp->changed = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1450 | sdkp->media_present = 1; |
Kay Sievers | 285e967 | 2007-08-14 14:10:39 +0200 | [diff] [blame] | 1451 | out: |
Alan Stern | 3ff5588 | 2010-09-07 11:44:01 -0400 | [diff] [blame] | 1452 | /* |
Tejun Heo | 2bae009 | 2010-12-18 18:42:23 +0100 | [diff] [blame] | 1453 | * sdp->changed is set under the following conditions: |
Alan Stern | 3ff5588 | 2010-09-07 11:44:01 -0400 | [diff] [blame] | 1454 | * |
Tejun Heo | 2bae009 | 2010-12-18 18:42:23 +0100 | [diff] [blame] | 1455 | * Medium present state has changed in either direction. |
| 1456 | * Device has indicated UNIT_ATTENTION. |
Alan Stern | 3ff5588 | 2010-09-07 11:44:01 -0400 | [diff] [blame] | 1457 | */ |
James Bottomley | 001aac2 | 2007-12-02 19:10:40 +0200 | [diff] [blame] | 1458 | kfree(sshdr); |
Tejun Heo | 2bae009 | 2010-12-18 18:42:23 +0100 | [diff] [blame] | 1459 | retval = sdp->changed ? DISK_EVENT_MEDIA_CHANGE : 0; |
| 1460 | sdp->changed = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1461 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1462 | } |
| 1463 | |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 1464 | static int sd_sync_cache(struct scsi_disk *sdkp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1465 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1466 | int retries, res; |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 1467 | struct scsi_device *sdp = sdkp->device; |
James Bottomley | 7e66010 | 2013-10-04 21:42:24 +0000 | [diff] [blame] | 1468 | const int timeout = sdp->request_queue->rq_timeout |
| 1469 | * SD_FLUSH_TIMEOUT_MULTIPLIER; |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 1470 | struct scsi_sense_hdr sshdr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1471 | |
| 1472 | if (!scsi_device_online(sdp)) |
| 1473 | return -ENODEV; |
| 1474 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1475 | for (retries = 3; retries > 0; --retries) { |
| 1476 | unsigned char cmd[10] = { 0 }; |
| 1477 | |
| 1478 | cmd[0] = SYNCHRONIZE_CACHE; |
| 1479 | /* |
| 1480 | * Leave the rest of the command zero to indicate |
| 1481 | * flush everything. |
| 1482 | */ |
Lin Ming | 9b21493 | 2013-03-23 11:42:25 +0800 | [diff] [blame] | 1483 | res = scsi_execute_req_flags(sdp, cmd, DMA_NONE, NULL, 0, |
James Bottomley | 7e66010 | 2013-10-04 21:42:24 +0000 | [diff] [blame] | 1484 | &sshdr, timeout, SD_MAX_RETRIES, |
| 1485 | NULL, REQ_PM); |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 1486 | if (res == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1487 | break; |
| 1488 | } |
| 1489 | |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 1490 | if (res) { |
Hannes Reinecke | ef61329 | 2014-10-24 14:27:00 +0200 | [diff] [blame] | 1491 | sd_print_result(sdkp, "Synchronize Cache(10) failed", res); |
Oliver Neukum | 9589791 | 2013-09-16 13:28:15 +0200 | [diff] [blame] | 1492 | |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 1493 | if (driver_byte(res) & DRIVER_SENSE) |
| 1494 | sd_print_sense_hdr(sdkp, &sshdr); |
Oliver Neukum | 9589791 | 2013-09-16 13:28:15 +0200 | [diff] [blame] | 1495 | /* we need to evaluate the error return */ |
| 1496 | if (scsi_sense_valid(&sshdr) && |
Alan Stern | 7aae513 | 2014-01-15 15:37:04 -0500 | [diff] [blame] | 1497 | (sshdr.asc == 0x3a || /* medium not present */ |
| 1498 | sshdr.asc == 0x20)) /* invalid command */ |
Oliver Neukum | 9589791 | 2013-09-16 13:28:15 +0200 | [diff] [blame] | 1499 | /* this is no error here */ |
| 1500 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1501 | |
Oliver Neukum | 9589791 | 2013-09-16 13:28:15 +0200 | [diff] [blame] | 1502 | switch (host_byte(res)) { |
| 1503 | /* ignore errors due to racing a disconnection */ |
| 1504 | case DID_BAD_TARGET: |
| 1505 | case DID_NO_CONNECT: |
| 1506 | return 0; |
| 1507 | /* signal the upper layer it might try again */ |
| 1508 | case DID_BUS_BUSY: |
| 1509 | case DID_IMM_RETRY: |
| 1510 | case DID_REQUEUE: |
| 1511 | case DID_SOFT_ERROR: |
| 1512 | return -EBUSY; |
| 1513 | default: |
| 1514 | return -EIO; |
| 1515 | } |
| 1516 | } |
Tejun Heo | 3721050 | 2007-03-21 00:07:18 +0900 | [diff] [blame] | 1517 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1518 | } |
| 1519 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1520 | static void sd_rescan(struct device *dev) |
| 1521 | { |
Christoph Hellwig | 3d9a1f5 | 2015-02-02 14:01:25 +0100 | [diff] [blame] | 1522 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
Alan Stern | 39b7f1e | 2005-11-04 14:44:41 -0500 | [diff] [blame] | 1523 | |
Christoph Hellwig | 3d9a1f5 | 2015-02-02 14:01:25 +0100 | [diff] [blame] | 1524 | revalidate_disk(sdkp->disk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1525 | } |
| 1526 | |
| 1527 | |
| 1528 | #ifdef CONFIG_COMPAT |
| 1529 | /* |
| 1530 | * This gets directly called from VFS. When the ioctl |
| 1531 | * is not recognized we go back to the other translation paths. |
| 1532 | */ |
Al Viro | 0338e29 | 2008-03-02 10:41:04 -0500 | [diff] [blame] | 1533 | static int sd_compat_ioctl(struct block_device *bdev, fmode_t mode, |
| 1534 | unsigned int cmd, unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1535 | { |
Al Viro | 0338e29 | 2008-03-02 10:41:04 -0500 | [diff] [blame] | 1536 | struct scsi_device *sdev = scsi_disk(bdev->bd_disk)->device; |
Christoph Hellwig | 21a9d4c | 2014-10-24 18:39:37 +0200 | [diff] [blame] | 1537 | int error; |
Paolo Bonzini | 0bfc96c | 2012-01-12 16:01:28 +0100 | [diff] [blame] | 1538 | |
Christoph Hellwig | 21a9d4c | 2014-10-24 18:39:37 +0200 | [diff] [blame] | 1539 | error = scsi_ioctl_block_when_processing_errors(sdev, cmd, |
| 1540 | (mode & FMODE_NDELAY) != 0); |
| 1541 | if (error) |
| 1542 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1543 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1544 | /* |
| 1545 | * Let the static ioctl translation table take care of it. |
| 1546 | */ |
Christoph Hellwig | 21a9d4c | 2014-10-24 18:39:37 +0200 | [diff] [blame] | 1547 | if (!sdev->host->hostt->compat_ioctl) |
| 1548 | return -ENOIOCTLCMD; |
| 1549 | return sdev->host->hostt->compat_ioctl(sdev, cmd, (void __user *)arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1550 | } |
| 1551 | #endif |
| 1552 | |
Christoph Hellwig | 924d55b | 2015-10-15 14:10:49 +0200 | [diff] [blame] | 1553 | static char sd_pr_type(enum pr_type type) |
| 1554 | { |
| 1555 | switch (type) { |
| 1556 | case PR_WRITE_EXCLUSIVE: |
| 1557 | return 0x01; |
| 1558 | case PR_EXCLUSIVE_ACCESS: |
| 1559 | return 0x03; |
| 1560 | case PR_WRITE_EXCLUSIVE_REG_ONLY: |
| 1561 | return 0x05; |
| 1562 | case PR_EXCLUSIVE_ACCESS_REG_ONLY: |
| 1563 | return 0x06; |
| 1564 | case PR_WRITE_EXCLUSIVE_ALL_REGS: |
| 1565 | return 0x07; |
| 1566 | case PR_EXCLUSIVE_ACCESS_ALL_REGS: |
| 1567 | return 0x08; |
| 1568 | default: |
| 1569 | return 0; |
| 1570 | } |
| 1571 | }; |
| 1572 | |
| 1573 | static int sd_pr_command(struct block_device *bdev, u8 sa, |
| 1574 | u64 key, u64 sa_key, u8 type, u8 flags) |
| 1575 | { |
| 1576 | struct scsi_device *sdev = scsi_disk(bdev->bd_disk)->device; |
| 1577 | struct scsi_sense_hdr sshdr; |
| 1578 | int result; |
| 1579 | u8 cmd[16] = { 0, }; |
| 1580 | u8 data[24] = { 0, }; |
| 1581 | |
| 1582 | cmd[0] = PERSISTENT_RESERVE_OUT; |
| 1583 | cmd[1] = sa; |
| 1584 | cmd[2] = type; |
| 1585 | put_unaligned_be32(sizeof(data), &cmd[5]); |
| 1586 | |
| 1587 | put_unaligned_be64(key, &data[0]); |
| 1588 | put_unaligned_be64(sa_key, &data[8]); |
| 1589 | data[20] = flags; |
| 1590 | |
| 1591 | result = scsi_execute_req(sdev, cmd, DMA_TO_DEVICE, &data, sizeof(data), |
| 1592 | &sshdr, SD_TIMEOUT, SD_MAX_RETRIES, NULL); |
| 1593 | |
| 1594 | if ((driver_byte(result) & DRIVER_SENSE) && |
| 1595 | (scsi_sense_valid(&sshdr))) { |
| 1596 | sdev_printk(KERN_INFO, sdev, "PR command failed: %d\n", result); |
| 1597 | scsi_print_sense_hdr(sdev, NULL, &sshdr); |
| 1598 | } |
| 1599 | |
| 1600 | return result; |
| 1601 | } |
| 1602 | |
| 1603 | static int sd_pr_register(struct block_device *bdev, u64 old_key, u64 new_key, |
| 1604 | u32 flags) |
| 1605 | { |
| 1606 | if (flags & ~PR_FL_IGNORE_KEY) |
| 1607 | return -EOPNOTSUPP; |
| 1608 | return sd_pr_command(bdev, (flags & PR_FL_IGNORE_KEY) ? 0x06 : 0x00, |
| 1609 | old_key, new_key, 0, |
| 1610 | (1 << 0) /* APTPL */ | |
| 1611 | (1 << 2) /* ALL_TG_PT */); |
| 1612 | } |
| 1613 | |
| 1614 | static int sd_pr_reserve(struct block_device *bdev, u64 key, enum pr_type type, |
| 1615 | u32 flags) |
| 1616 | { |
| 1617 | if (flags) |
| 1618 | return -EOPNOTSUPP; |
| 1619 | return sd_pr_command(bdev, 0x01, key, 0, sd_pr_type(type), 0); |
| 1620 | } |
| 1621 | |
| 1622 | static int sd_pr_release(struct block_device *bdev, u64 key, enum pr_type type) |
| 1623 | { |
| 1624 | return sd_pr_command(bdev, 0x02, key, 0, sd_pr_type(type), 0); |
| 1625 | } |
| 1626 | |
| 1627 | static int sd_pr_preempt(struct block_device *bdev, u64 old_key, u64 new_key, |
| 1628 | enum pr_type type, bool abort) |
| 1629 | { |
| 1630 | return sd_pr_command(bdev, abort ? 0x05 : 0x04, old_key, new_key, |
| 1631 | sd_pr_type(type), 0); |
| 1632 | } |
| 1633 | |
| 1634 | static int sd_pr_clear(struct block_device *bdev, u64 key) |
| 1635 | { |
| 1636 | return sd_pr_command(bdev, 0x03, key, 0, 0, 0); |
| 1637 | } |
| 1638 | |
| 1639 | static const struct pr_ops sd_pr_ops = { |
| 1640 | .pr_register = sd_pr_register, |
| 1641 | .pr_reserve = sd_pr_reserve, |
| 1642 | .pr_release = sd_pr_release, |
| 1643 | .pr_preempt = sd_pr_preempt, |
| 1644 | .pr_clear = sd_pr_clear, |
| 1645 | }; |
| 1646 | |
Alexey Dobriyan | 83d5cde | 2009-09-21 17:01:13 -0700 | [diff] [blame] | 1647 | static const struct block_device_operations sd_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1648 | .owner = THIS_MODULE, |
Al Viro | 0338e29 | 2008-03-02 10:41:04 -0500 | [diff] [blame] | 1649 | .open = sd_open, |
| 1650 | .release = sd_release, |
Arnd Bergmann | 8a6cfeb | 2010-07-08 10:18:46 +0200 | [diff] [blame] | 1651 | .ioctl = sd_ioctl, |
Christoph Hellwig | a885c8c | 2006-01-08 01:02:50 -0800 | [diff] [blame] | 1652 | .getgeo = sd_getgeo, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1653 | #ifdef CONFIG_COMPAT |
Al Viro | 0338e29 | 2008-03-02 10:41:04 -0500 | [diff] [blame] | 1654 | .compat_ioctl = sd_compat_ioctl, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1655 | #endif |
Tejun Heo | 2bae009 | 2010-12-18 18:42:23 +0100 | [diff] [blame] | 1656 | .check_events = sd_check_events, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1657 | .revalidate_disk = sd_revalidate_disk, |
Tejun Heo | 72ec24b | 2010-05-15 20:09:32 +0200 | [diff] [blame] | 1658 | .unlock_native_capacity = sd_unlock_native_capacity, |
Christoph Hellwig | 924d55b | 2015-10-15 14:10:49 +0200 | [diff] [blame] | 1659 | .pr_ops = &sd_pr_ops, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1660 | }; |
| 1661 | |
Martin K. Petersen | 18a4d0a | 2012-02-09 13:48:53 -0500 | [diff] [blame] | 1662 | /** |
| 1663 | * sd_eh_action - error handling callback |
| 1664 | * @scmd: sd-issued command that has failed |
Martin K. Petersen | 18a4d0a | 2012-02-09 13:48:53 -0500 | [diff] [blame] | 1665 | * @eh_disp: The recovery disposition suggested by the midlayer |
| 1666 | * |
James Bottomley | 2451079 | 2013-11-11 13:44:53 +0100 | [diff] [blame] | 1667 | * This function is called by the SCSI midlayer upon completion of an |
| 1668 | * error test command (currently TEST UNIT READY). The result of sending |
| 1669 | * the eh command is passed in eh_disp. We're looking for devices that |
| 1670 | * fail medium access commands but are OK with non access commands like |
| 1671 | * test unit ready (so wrongly see the device as having a successful |
| 1672 | * recovery) |
Martin K. Petersen | 18a4d0a | 2012-02-09 13:48:53 -0500 | [diff] [blame] | 1673 | **/ |
James Bottomley | 2451079 | 2013-11-11 13:44:53 +0100 | [diff] [blame] | 1674 | static int sd_eh_action(struct scsi_cmnd *scmd, int eh_disp) |
Martin K. Petersen | 18a4d0a | 2012-02-09 13:48:53 -0500 | [diff] [blame] | 1675 | { |
| 1676 | struct scsi_disk *sdkp = scsi_disk(scmd->request->rq_disk); |
| 1677 | |
| 1678 | if (!scsi_device_online(scmd->device) || |
James Bottomley | 2451079 | 2013-11-11 13:44:53 +0100 | [diff] [blame] | 1679 | !scsi_medium_access_command(scmd) || |
| 1680 | host_byte(scmd->result) != DID_TIME_OUT || |
| 1681 | eh_disp != SUCCESS) |
Martin K. Petersen | 18a4d0a | 2012-02-09 13:48:53 -0500 | [diff] [blame] | 1682 | return eh_disp; |
| 1683 | |
| 1684 | /* |
| 1685 | * The device has timed out executing a medium access command. |
| 1686 | * However, the TEST UNIT READY command sent during error |
| 1687 | * handling completed successfully. Either the device is in the |
| 1688 | * process of recovering or has it suffered an internal failure |
| 1689 | * that prevents access to the storage medium. |
| 1690 | */ |
James Bottomley | 2451079 | 2013-11-11 13:44:53 +0100 | [diff] [blame] | 1691 | sdkp->medium_access_timed_out++; |
Martin K. Petersen | 18a4d0a | 2012-02-09 13:48:53 -0500 | [diff] [blame] | 1692 | |
| 1693 | /* |
| 1694 | * If the device keeps failing read/write commands but TEST UNIT |
| 1695 | * READY always completes successfully we assume that medium |
| 1696 | * access is no longer possible and take the device offline. |
| 1697 | */ |
| 1698 | if (sdkp->medium_access_timed_out >= sdkp->max_medium_access_timeouts) { |
| 1699 | scmd_printk(KERN_ERR, scmd, |
| 1700 | "Medium access timeout failure. Offlining disk!\n"); |
| 1701 | scsi_device_set_state(scmd->device, SDEV_OFFLINE); |
| 1702 | |
| 1703 | return FAILED; |
| 1704 | } |
| 1705 | |
| 1706 | return eh_disp; |
| 1707 | } |
| 1708 | |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 1709 | static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd) |
| 1710 | { |
Tejun Heo | 83096eb | 2009-05-07 22:24:39 +0900 | [diff] [blame] | 1711 | u64 start_lba = blk_rq_pos(scmd->request); |
| 1712 | u64 end_lba = blk_rq_pos(scmd->request) + (scsi_bufflen(scmd) / 512); |
Mark Hounschell | 74856fb | 2015-05-13 10:49:09 +0200 | [diff] [blame] | 1713 | u64 factor = scmd->device->sector_size / 512; |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 1714 | u64 bad_lba; |
| 1715 | int info_valid; |
James Bottomley | a8733c7 | 2010-12-17 15:36:34 -0500 | [diff] [blame] | 1716 | /* |
| 1717 | * resid is optional but mostly filled in. When it's unused, |
| 1718 | * its value is zero, so we assume the whole buffer transferred |
| 1719 | */ |
| 1720 | unsigned int transferred = scsi_bufflen(scmd) - scsi_get_resid(scmd); |
| 1721 | unsigned int good_bytes; |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 1722 | |
Christoph Hellwig | 33659eb | 2010-08-07 18:17:56 +0200 | [diff] [blame] | 1723 | if (scmd->request->cmd_type != REQ_TYPE_FS) |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 1724 | return 0; |
| 1725 | |
| 1726 | info_valid = scsi_get_sense_info_fld(scmd->sense_buffer, |
| 1727 | SCSI_SENSE_BUFFERSIZE, |
| 1728 | &bad_lba); |
| 1729 | if (!info_valid) |
| 1730 | return 0; |
| 1731 | |
| 1732 | if (scsi_bufflen(scmd) <= scmd->device->sector_size) |
| 1733 | return 0; |
| 1734 | |
Mark Hounschell | 74856fb | 2015-05-13 10:49:09 +0200 | [diff] [blame] | 1735 | /* be careful ... don't want any overflows */ |
| 1736 | do_div(start_lba, factor); |
| 1737 | do_div(end_lba, factor); |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 1738 | |
| 1739 | /* The bad lba was reported incorrectly, we have no idea where |
| 1740 | * the error is. |
| 1741 | */ |
| 1742 | if (bad_lba < start_lba || bad_lba >= end_lba) |
| 1743 | return 0; |
| 1744 | |
| 1745 | /* This computation should always be done in terms of |
| 1746 | * the resolution of the device's medium. |
| 1747 | */ |
James Bottomley | a8733c7 | 2010-12-17 15:36:34 -0500 | [diff] [blame] | 1748 | good_bytes = (bad_lba - start_lba) * scmd->device->sector_size; |
| 1749 | return min(good_bytes, transferred); |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 1750 | } |
| 1751 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1752 | /** |
Linus Torvalds | 7b3d954 | 2008-01-06 10:17:12 -0800 | [diff] [blame] | 1753 | * sd_done - bottom half handler: called when the lower level |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1754 | * driver has completed (successfully or otherwise) a scsi command. |
| 1755 | * @SCpnt: mid-level's per command structure. |
| 1756 | * |
| 1757 | * Note: potentially run from within an ISR. Must not block. |
| 1758 | **/ |
Linus Torvalds | 7b3d954 | 2008-01-06 10:17:12 -0800 | [diff] [blame] | 1759 | static int sd_done(struct scsi_cmnd *SCpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1760 | { |
| 1761 | int result = SCpnt->result; |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 1762 | unsigned int good_bytes = result ? 0 : scsi_bufflen(SCpnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1763 | struct scsi_sense_hdr sshdr; |
Martin K. Petersen | 4e7392e | 2009-09-20 16:49:38 -0400 | [diff] [blame] | 1764 | struct scsi_disk *sdkp = scsi_disk(SCpnt->request->rq_disk); |
Martin K. Petersen | 26e85fc | 2012-09-18 12:19:31 -0400 | [diff] [blame] | 1765 | struct request *req = SCpnt->request; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1766 | int sense_valid = 0; |
| 1767 | int sense_deferred = 0; |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 1768 | unsigned char op = SCpnt->cmnd[0]; |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 1769 | unsigned char unmap = SCpnt->cmnd[1] & 8; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1770 | |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 1771 | if (req->cmd_flags & REQ_DISCARD || req->cmd_flags & REQ_WRITE_SAME) { |
Martin K. Petersen | 26e85fc | 2012-09-18 12:19:31 -0400 | [diff] [blame] | 1772 | if (!result) { |
| 1773 | good_bytes = blk_rq_bytes(req); |
| 1774 | scsi_set_resid(SCpnt, 0); |
| 1775 | } else { |
| 1776 | good_bytes = 0; |
| 1777 | scsi_set_resid(SCpnt, blk_rq_bytes(req)); |
| 1778 | } |
| 1779 | } |
FUJITA Tomonori | 6a32a8a | 2010-07-21 10:29:37 +0900 | [diff] [blame] | 1780 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1781 | if (result) { |
| 1782 | sense_valid = scsi_command_normalize_sense(SCpnt, &sshdr); |
| 1783 | if (sense_valid) |
| 1784 | sense_deferred = scsi_sense_is_deferred(&sshdr); |
| 1785 | } |
David Jeffery | 2a863ba | 2014-04-10 11:08:30 -0400 | [diff] [blame] | 1786 | sdkp->medium_access_timed_out = 0; |
| 1787 | |
Luben Tuikov | 03aba2f | 2006-06-23 09:39:09 -0700 | [diff] [blame] | 1788 | if (driver_byte(result) != DRIVER_SENSE && |
| 1789 | (!sense_valid || sense_deferred)) |
| 1790 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1791 | |
Luben Tuikov | 03aba2f | 2006-06-23 09:39:09 -0700 | [diff] [blame] | 1792 | switch (sshdr.sense_key) { |
| 1793 | case HARDWARE_ERROR: |
| 1794 | case MEDIUM_ERROR: |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 1795 | good_bytes = sd_completed_bytes(SCpnt); |
Luben Tuikov | 03aba2f | 2006-06-23 09:39:09 -0700 | [diff] [blame] | 1796 | break; |
| 1797 | case RECOVERED_ERROR: |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 1798 | good_bytes = scsi_bufflen(SCpnt); |
| 1799 | break; |
Jamie Wellnitz | 10dab22 | 2008-09-11 21:39:36 -0400 | [diff] [blame] | 1800 | case NO_SENSE: |
| 1801 | /* This indicates a false check condition, so ignore it. An |
| 1802 | * unknown amount of data was transferred so treat it as an |
| 1803 | * error. |
| 1804 | */ |
Jamie Wellnitz | 10dab22 | 2008-09-11 21:39:36 -0400 | [diff] [blame] | 1805 | SCpnt->result = 0; |
| 1806 | memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); |
| 1807 | break; |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 1808 | case ABORTED_COMMAND: |
| 1809 | if (sshdr.asc == 0x10) /* DIF: Target detected corruption */ |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 1810 | good_bytes = sd_completed_bytes(SCpnt); |
Luben Tuikov | 03aba2f | 2006-06-23 09:39:09 -0700 | [diff] [blame] | 1811 | break; |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 1812 | case ILLEGAL_REQUEST: |
| 1813 | if (sshdr.asc == 0x10) /* DIX: Host detected corruption */ |
| 1814 | good_bytes = sd_completed_bytes(SCpnt); |
| 1815 | /* INVALID COMMAND OPCODE or INVALID FIELD IN CDB */ |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 1816 | if (sshdr.asc == 0x20 || sshdr.asc == 0x24) { |
| 1817 | switch (op) { |
| 1818 | case UNMAP: |
| 1819 | sd_config_discard(sdkp, SD_LBP_DISABLE); |
| 1820 | break; |
| 1821 | case WRITE_SAME_16: |
| 1822 | case WRITE_SAME: |
| 1823 | if (unmap) |
| 1824 | sd_config_discard(sdkp, SD_LBP_DISABLE); |
| 1825 | else { |
| 1826 | sdkp->device->no_write_same = 1; |
| 1827 | sd_config_write_same(sdkp); |
| 1828 | |
| 1829 | good_bytes = 0; |
| 1830 | req->__data_len = blk_rq_bytes(req); |
| 1831 | req->cmd_flags |= REQ_QUIET; |
| 1832 | } |
| 1833 | } |
| 1834 | } |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 1835 | break; |
Luben Tuikov | 03aba2f | 2006-06-23 09:39:09 -0700 | [diff] [blame] | 1836 | default: |
| 1837 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1838 | } |
Luben Tuikov | 03aba2f | 2006-06-23 09:39:09 -0700 | [diff] [blame] | 1839 | out: |
Hannes Reinecke | ef61329 | 2014-10-24 14:27:00 +0200 | [diff] [blame] | 1840 | SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO, SCpnt, |
| 1841 | "sd_done: completed %d of %d bytes\n", |
| 1842 | good_bytes, scsi_bufflen(SCpnt))); |
| 1843 | |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 1844 | if (rq_data_dir(SCpnt->request) == READ && scsi_prot_sg_count(SCpnt)) |
| 1845 | sd_dif_complete(SCpnt, good_bytes); |
| 1846 | |
Linus Torvalds | 7b3d954 | 2008-01-06 10:17:12 -0800 | [diff] [blame] | 1847 | return good_bytes; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1848 | } |
| 1849 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1850 | /* |
| 1851 | * spinup disk - called only in sd_revalidate_disk() |
| 1852 | */ |
| 1853 | static void |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 1854 | sd_spinup_disk(struct scsi_disk *sdkp) |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 1855 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1856 | unsigned char cmd[10]; |
Alan Stern | 4451e47 | 2005-07-12 10:45:17 -0400 | [diff] [blame] | 1857 | unsigned long spintime_expire = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1858 | int retries, spintime; |
| 1859 | unsigned int the_result; |
| 1860 | struct scsi_sense_hdr sshdr; |
| 1861 | int sense_valid = 0; |
| 1862 | |
| 1863 | spintime = 0; |
| 1864 | |
| 1865 | /* Spin up drives, as required. Only do this at boot time */ |
| 1866 | /* Spinup needs to be done for module loads too. */ |
| 1867 | do { |
| 1868 | retries = 0; |
| 1869 | |
| 1870 | do { |
| 1871 | cmd[0] = TEST_UNIT_READY; |
| 1872 | memset((void *) &cmd[1], 0, 9); |
| 1873 | |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 1874 | the_result = scsi_execute_req(sdkp->device, cmd, |
| 1875 | DMA_NONE, NULL, 0, |
| 1876 | &sshdr, SD_TIMEOUT, |
FUJITA Tomonori | f4f4e47 | 2008-12-04 14:24:39 +0900 | [diff] [blame] | 1877 | SD_MAX_RETRIES, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1878 | |
Alan Stern | b4d38e3 | 2006-10-11 16:48:28 -0400 | [diff] [blame] | 1879 | /* |
| 1880 | * If the drive has indicated to us that it |
| 1881 | * doesn't have any media in it, don't bother |
| 1882 | * with any more polling. |
| 1883 | */ |
| 1884 | if (media_not_present(sdkp, &sshdr)) |
| 1885 | return; |
| 1886 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1887 | if (the_result) |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 1888 | sense_valid = scsi_sense_valid(&sshdr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1889 | retries++; |
| 1890 | } while (retries < 3 && |
| 1891 | (!scsi_status_is_good(the_result) || |
| 1892 | ((driver_byte(the_result) & DRIVER_SENSE) && |
| 1893 | sense_valid && sshdr.sense_key == UNIT_ATTENTION))); |
| 1894 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1895 | if ((driver_byte(the_result) & DRIVER_SENSE) == 0) { |
| 1896 | /* no sense, TUR either succeeded or failed |
| 1897 | * with a status error */ |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 1898 | if(!spintime && !scsi_status_is_good(the_result)) { |
Hannes Reinecke | ef61329 | 2014-10-24 14:27:00 +0200 | [diff] [blame] | 1899 | sd_print_result(sdkp, "Test Unit Ready failed", |
| 1900 | the_result); |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 1901 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1902 | break; |
| 1903 | } |
Hannes Reinecke | ef61329 | 2014-10-24 14:27:00 +0200 | [diff] [blame] | 1904 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1905 | /* |
| 1906 | * The device does not want the automatic start to be issued. |
| 1907 | */ |
Matthew Wilcox | 33dd6f9 | 2009-02-20 06:53:48 -0700 | [diff] [blame] | 1908 | if (sdkp->device->no_start_on_add) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1909 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1910 | |
Matthew Wilcox | 33dd6f9 | 2009-02-20 06:53:48 -0700 | [diff] [blame] | 1911 | if (sense_valid && sshdr.sense_key == NOT_READY) { |
| 1912 | if (sshdr.asc == 4 && sshdr.ascq == 3) |
| 1913 | break; /* manual intervention required */ |
| 1914 | if (sshdr.asc == 4 && sshdr.ascq == 0xb) |
| 1915 | break; /* standby */ |
| 1916 | if (sshdr.asc == 4 && sshdr.ascq == 0xc) |
| 1917 | break; /* unavailable */ |
| 1918 | /* |
| 1919 | * Issue command to spin up drive when not ready |
| 1920 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1921 | if (!spintime) { |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 1922 | sd_printk(KERN_NOTICE, sdkp, "Spinning up disk..."); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1923 | cmd[0] = START_STOP; |
| 1924 | cmd[1] = 1; /* Return immediately */ |
| 1925 | memset((void *) &cmd[2], 0, 8); |
| 1926 | cmd[4] = 1; /* Start spin cycle */ |
Stefan Richter | d2886ea | 2008-05-11 00:34:07 +0200 | [diff] [blame] | 1927 | if (sdkp->device->start_stop_pwr_cond) |
| 1928 | cmd[4] |= 1 << 4; |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 1929 | scsi_execute_req(sdkp->device, cmd, DMA_NONE, |
| 1930 | NULL, 0, &sshdr, |
FUJITA Tomonori | f4f4e47 | 2008-12-04 14:24:39 +0900 | [diff] [blame] | 1931 | SD_TIMEOUT, SD_MAX_RETRIES, |
| 1932 | NULL); |
Alan Stern | 4451e47 | 2005-07-12 10:45:17 -0400 | [diff] [blame] | 1933 | spintime_expire = jiffies + 100 * HZ; |
| 1934 | spintime = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1935 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1936 | /* Wait 1 second for next try */ |
| 1937 | msleep(1000); |
| 1938 | printk("."); |
Alan Stern | 4451e47 | 2005-07-12 10:45:17 -0400 | [diff] [blame] | 1939 | |
| 1940 | /* |
| 1941 | * Wait for USB flash devices with slow firmware. |
| 1942 | * Yes, this sense key/ASC combination shouldn't |
| 1943 | * occur here. It's characteristic of these devices. |
| 1944 | */ |
| 1945 | } else if (sense_valid && |
| 1946 | sshdr.sense_key == UNIT_ATTENTION && |
| 1947 | sshdr.asc == 0x28) { |
| 1948 | if (!spintime) { |
| 1949 | spintime_expire = jiffies + 5 * HZ; |
| 1950 | spintime = 1; |
| 1951 | } |
| 1952 | /* Wait 1 second for next try */ |
| 1953 | msleep(1000); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1954 | } else { |
| 1955 | /* we don't understand the sense code, so it's |
| 1956 | * probably pointless to loop */ |
| 1957 | if(!spintime) { |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 1958 | sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n"); |
| 1959 | sd_print_sense_hdr(sdkp, &sshdr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1960 | } |
| 1961 | break; |
| 1962 | } |
| 1963 | |
Alan Stern | 4451e47 | 2005-07-12 10:45:17 -0400 | [diff] [blame] | 1964 | } while (spintime && time_before_eq(jiffies, spintime_expire)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1965 | |
| 1966 | if (spintime) { |
| 1967 | if (scsi_status_is_good(the_result)) |
| 1968 | printk("ready\n"); |
| 1969 | else |
| 1970 | printk("not responding...\n"); |
| 1971 | } |
| 1972 | } |
| 1973 | |
Martin K. Petersen | e0597d7 | 2008-07-17 04:28:34 -0400 | [diff] [blame] | 1974 | |
| 1975 | /* |
| 1976 | * Determine whether disk supports Data Integrity Field. |
| 1977 | */ |
Martin K. Petersen | fe54239 | 2012-09-21 12:44:12 -0400 | [diff] [blame] | 1978 | static int sd_read_protection_type(struct scsi_disk *sdkp, unsigned char *buffer) |
Martin K. Petersen | e0597d7 | 2008-07-17 04:28:34 -0400 | [diff] [blame] | 1979 | { |
| 1980 | struct scsi_device *sdp = sdkp->device; |
| 1981 | u8 type; |
Martin K. Petersen | fe54239 | 2012-09-21 12:44:12 -0400 | [diff] [blame] | 1982 | int ret = 0; |
Martin K. Petersen | e0597d7 | 2008-07-17 04:28:34 -0400 | [diff] [blame] | 1983 | |
| 1984 | if (scsi_device_protection(sdp) == 0 || (buffer[12] & 1) == 0) |
Martin K. Petersen | fe54239 | 2012-09-21 12:44:12 -0400 | [diff] [blame] | 1985 | return ret; |
Martin K. Petersen | 35e1a5d | 2009-09-18 17:33:00 -0400 | [diff] [blame] | 1986 | |
| 1987 | type = ((buffer[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */ |
| 1988 | |
Martin K. Petersen | fe54239 | 2012-09-21 12:44:12 -0400 | [diff] [blame] | 1989 | if (type > SD_DIF_TYPE3_PROTECTION) |
| 1990 | ret = -ENODEV; |
| 1991 | else if (scsi_host_dif_capable(sdp->host, type)) |
| 1992 | ret = 1; |
| 1993 | |
| 1994 | if (sdkp->first_scan || type != sdkp->protection_type) |
| 1995 | switch (ret) { |
| 1996 | case -ENODEV: |
| 1997 | sd_printk(KERN_ERR, sdkp, "formatted with unsupported" \ |
| 1998 | " protection type %u. Disabling disk!\n", |
| 1999 | type); |
| 2000 | break; |
| 2001 | case 1: |
| 2002 | sd_printk(KERN_NOTICE, sdkp, |
| 2003 | "Enabling DIF Type %u protection\n", type); |
| 2004 | break; |
| 2005 | case 0: |
| 2006 | sd_printk(KERN_NOTICE, sdkp, |
| 2007 | "Disabling DIF Type %u protection\n", type); |
| 2008 | break; |
| 2009 | } |
Martin K. Petersen | e0597d7 | 2008-07-17 04:28:34 -0400 | [diff] [blame] | 2010 | |
Martin K. Petersen | be922f4 | 2008-09-19 18:47:20 -0400 | [diff] [blame] | 2011 | sdkp->protection_type = type; |
| 2012 | |
Martin K. Petersen | fe54239 | 2012-09-21 12:44:12 -0400 | [diff] [blame] | 2013 | return ret; |
Martin K. Petersen | e0597d7 | 2008-07-17 04:28:34 -0400 | [diff] [blame] | 2014 | } |
| 2015 | |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2016 | static void read_capacity_error(struct scsi_disk *sdkp, struct scsi_device *sdp, |
| 2017 | struct scsi_sense_hdr *sshdr, int sense_valid, |
| 2018 | int the_result) |
| 2019 | { |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2020 | if (driver_byte(the_result) & DRIVER_SENSE) |
| 2021 | sd_print_sense_hdr(sdkp, sshdr); |
| 2022 | else |
| 2023 | sd_printk(KERN_NOTICE, sdkp, "Sense not available.\n"); |
| 2024 | |
| 2025 | /* |
| 2026 | * Set dirty bit for removable devices if not ready - |
| 2027 | * sometimes drives will not report this properly. |
| 2028 | */ |
| 2029 | if (sdp->removable && |
| 2030 | sense_valid && sshdr->sense_key == NOT_READY) |
Tejun Heo | 2bae009 | 2010-12-18 18:42:23 +0100 | [diff] [blame] | 2031 | set_media_not_present(sdkp); |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2032 | |
| 2033 | /* |
| 2034 | * We used to set media_present to 0 here to indicate no media |
| 2035 | * in the drive, but some drives fail read capacity even with |
| 2036 | * media present, so we can't do that. |
| 2037 | */ |
| 2038 | sdkp->capacity = 0; /* unknown mapped to zero - as usual */ |
| 2039 | } |
| 2040 | |
| 2041 | #define RC16_LEN 32 |
| 2042 | #if RC16_LEN > SD_BUF_SIZE |
| 2043 | #error RC16_LEN must not be more than SD_BUF_SIZE |
| 2044 | #endif |
| 2045 | |
James Bottomley | 3233ac1 | 2010-04-01 10:30:01 -0400 | [diff] [blame] | 2046 | #define READ_CAPACITY_RETRIES_ON_RESET 10 |
| 2047 | |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2048 | static int read_capacity_16(struct scsi_disk *sdkp, struct scsi_device *sdp, |
| 2049 | unsigned char *buffer) |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 2050 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2051 | unsigned char cmd[16]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2052 | struct scsi_sense_hdr sshdr; |
| 2053 | int sense_valid = 0; |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2054 | int the_result; |
James Bottomley | 3233ac1 | 2010-04-01 10:30:01 -0400 | [diff] [blame] | 2055 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
Martin K. Petersen | ea09bcc | 2009-05-23 11:43:37 -0400 | [diff] [blame] | 2056 | unsigned int alignment; |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2057 | unsigned long long lba; |
| 2058 | unsigned sector_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2059 | |
Hans de Goede | 5ce524b | 2010-10-01 14:20:10 -0700 | [diff] [blame] | 2060 | if (sdp->no_read_capacity_16) |
| 2061 | return -EINVAL; |
| 2062 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2063 | do { |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2064 | memset(cmd, 0, 16); |
Hannes Reinecke | eb846d9 | 2014-11-17 14:25:19 +0100 | [diff] [blame] | 2065 | cmd[0] = SERVICE_ACTION_IN_16; |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2066 | cmd[1] = SAI_READ_CAPACITY_16; |
| 2067 | cmd[13] = RC16_LEN; |
| 2068 | memset(buffer, 0, RC16_LEN); |
| 2069 | |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 2070 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2071 | buffer, RC16_LEN, &sshdr, |
| 2072 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2073 | |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 2074 | if (media_not_present(sdkp, &sshdr)) |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2075 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2076 | |
Matthew Wilcox | 2b30130 | 2009-03-12 14:20:30 -0400 | [diff] [blame] | 2077 | if (the_result) { |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 2078 | sense_valid = scsi_sense_valid(&sshdr); |
Matthew Wilcox | 2b30130 | 2009-03-12 14:20:30 -0400 | [diff] [blame] | 2079 | if (sense_valid && |
| 2080 | sshdr.sense_key == ILLEGAL_REQUEST && |
| 2081 | (sshdr.asc == 0x20 || sshdr.asc == 0x24) && |
| 2082 | sshdr.ascq == 0x00) |
| 2083 | /* Invalid Command Operation Code or |
| 2084 | * Invalid Field in CDB, just retry |
| 2085 | * silently with RC10 */ |
| 2086 | return -EINVAL; |
James Bottomley | 3233ac1 | 2010-04-01 10:30:01 -0400 | [diff] [blame] | 2087 | if (sense_valid && |
| 2088 | sshdr.sense_key == UNIT_ATTENTION && |
| 2089 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) |
| 2090 | /* Device reset might occur several times, |
| 2091 | * give it one more chance */ |
| 2092 | if (--reset_retries > 0) |
| 2093 | continue; |
Matthew Wilcox | 2b30130 | 2009-03-12 14:20:30 -0400 | [diff] [blame] | 2094 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2095 | retries--; |
| 2096 | |
| 2097 | } while (the_result && retries); |
| 2098 | |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2099 | if (the_result) { |
Hannes Reinecke | ef61329 | 2014-10-24 14:27:00 +0200 | [diff] [blame] | 2100 | sd_print_result(sdkp, "Read Capacity(16) failed", the_result); |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2101 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); |
| 2102 | return -EINVAL; |
| 2103 | } |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 2104 | |
Dave Hansen | 8f76d15 | 2009-04-21 16:43:27 -0700 | [diff] [blame] | 2105 | sector_size = get_unaligned_be32(&buffer[8]); |
| 2106 | lba = get_unaligned_be64(&buffer[0]); |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2107 | |
Martin K. Petersen | fe54239 | 2012-09-21 12:44:12 -0400 | [diff] [blame] | 2108 | if (sd_read_protection_type(sdkp, buffer) < 0) { |
| 2109 | sdkp->capacity = 0; |
| 2110 | return -ENODEV; |
| 2111 | } |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2112 | |
| 2113 | if ((sizeof(sdkp->capacity) == 4) && (lba >= 0xffffffffULL)) { |
| 2114 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a " |
| 2115 | "kernel compiled with support for large block " |
| 2116 | "devices.\n"); |
| 2117 | sdkp->capacity = 0; |
| 2118 | return -EOVERFLOW; |
| 2119 | } |
| 2120 | |
Martin K. Petersen | ea09bcc | 2009-05-23 11:43:37 -0400 | [diff] [blame] | 2121 | /* Logical blocks per physical block exponent */ |
Martin K. Petersen | 526f7c7 | 2010-09-28 14:48:47 -0400 | [diff] [blame] | 2122 | sdkp->physical_block_size = (1 << (buffer[13] & 0xf)) * sector_size; |
Martin K. Petersen | ea09bcc | 2009-05-23 11:43:37 -0400 | [diff] [blame] | 2123 | |
| 2124 | /* Lowest aligned logical block */ |
| 2125 | alignment = ((buffer[14] & 0x3f) << 8 | buffer[15]) * sector_size; |
| 2126 | blk_queue_alignment_offset(sdp->request_queue, alignment); |
| 2127 | if (alignment && sdkp->first_scan) |
| 2128 | sd_printk(KERN_NOTICE, sdkp, |
| 2129 | "physical block alignment offset: %u\n", alignment); |
| 2130 | |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 2131 | if (buffer[14] & 0x80) { /* LBPME */ |
| 2132 | sdkp->lbpme = 1; |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 2133 | |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 2134 | if (buffer[14] & 0x40) /* LBPRZ */ |
| 2135 | sdkp->lbprz = 1; |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 2136 | |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 2137 | sd_config_discard(sdkp, SD_LBP_WS16); |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 2138 | } |
| 2139 | |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2140 | sdkp->capacity = lba + 1; |
| 2141 | return sector_size; |
| 2142 | } |
| 2143 | |
| 2144 | static int read_capacity_10(struct scsi_disk *sdkp, struct scsi_device *sdp, |
| 2145 | unsigned char *buffer) |
| 2146 | { |
| 2147 | unsigned char cmd[16]; |
| 2148 | struct scsi_sense_hdr sshdr; |
| 2149 | int sense_valid = 0; |
| 2150 | int the_result; |
James Bottomley | 3233ac1 | 2010-04-01 10:30:01 -0400 | [diff] [blame] | 2151 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2152 | sector_t lba; |
| 2153 | unsigned sector_size; |
| 2154 | |
| 2155 | do { |
| 2156 | cmd[0] = READ_CAPACITY; |
| 2157 | memset(&cmd[1], 0, 9); |
| 2158 | memset(buffer, 0, 8); |
| 2159 | |
| 2160 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, |
| 2161 | buffer, 8, &sshdr, |
| 2162 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); |
| 2163 | |
| 2164 | if (media_not_present(sdkp, &sshdr)) |
| 2165 | return -ENODEV; |
| 2166 | |
James Bottomley | 3233ac1 | 2010-04-01 10:30:01 -0400 | [diff] [blame] | 2167 | if (the_result) { |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2168 | sense_valid = scsi_sense_valid(&sshdr); |
James Bottomley | 3233ac1 | 2010-04-01 10:30:01 -0400 | [diff] [blame] | 2169 | if (sense_valid && |
| 2170 | sshdr.sense_key == UNIT_ATTENTION && |
| 2171 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) |
| 2172 | /* Device reset might occur several times, |
| 2173 | * give it one more chance */ |
| 2174 | if (--reset_retries > 0) |
| 2175 | continue; |
| 2176 | } |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2177 | retries--; |
| 2178 | |
| 2179 | } while (the_result && retries); |
| 2180 | |
| 2181 | if (the_result) { |
Hannes Reinecke | ef61329 | 2014-10-24 14:27:00 +0200 | [diff] [blame] | 2182 | sd_print_result(sdkp, "Read Capacity(10) failed", the_result); |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2183 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); |
| 2184 | return -EINVAL; |
| 2185 | } |
| 2186 | |
Dave Hansen | 8f76d15 | 2009-04-21 16:43:27 -0700 | [diff] [blame] | 2187 | sector_size = get_unaligned_be32(&buffer[4]); |
| 2188 | lba = get_unaligned_be32(&buffer[0]); |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2189 | |
Hans de Goede | 5ce524b | 2010-10-01 14:20:10 -0700 | [diff] [blame] | 2190 | if (sdp->no_read_capacity_16 && (lba == 0xffffffff)) { |
| 2191 | /* Some buggy (usb cardreader) devices return an lba of |
| 2192 | 0xffffffff when the want to report a size of 0 (with |
| 2193 | which they really mean no media is present) */ |
| 2194 | sdkp->capacity = 0; |
Linus Torvalds | 5cc1035 | 2010-10-22 20:30:48 -0700 | [diff] [blame] | 2195 | sdkp->physical_block_size = sector_size; |
Hans de Goede | 5ce524b | 2010-10-01 14:20:10 -0700 | [diff] [blame] | 2196 | return sector_size; |
| 2197 | } |
| 2198 | |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2199 | if ((sizeof(sdkp->capacity) == 4) && (lba == 0xffffffff)) { |
| 2200 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a " |
| 2201 | "kernel compiled with support for large block " |
| 2202 | "devices.\n"); |
| 2203 | sdkp->capacity = 0; |
| 2204 | return -EOVERFLOW; |
| 2205 | } |
| 2206 | |
| 2207 | sdkp->capacity = lba + 1; |
Martin K. Petersen | 526f7c7 | 2010-09-28 14:48:47 -0400 | [diff] [blame] | 2208 | sdkp->physical_block_size = sector_size; |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2209 | return sector_size; |
| 2210 | } |
| 2211 | |
Matthew Wilcox | 2b30130 | 2009-03-12 14:20:30 -0400 | [diff] [blame] | 2212 | static int sd_try_rc16_first(struct scsi_device *sdp) |
| 2213 | { |
Hannes Reinecke | f87146b | 2010-03-29 09:29:24 +0200 | [diff] [blame] | 2214 | if (sdp->host->max_cmd_len < 16) |
| 2215 | return 0; |
Alan Stern | 6a0bdff | 2012-06-20 16:04:19 -0400 | [diff] [blame] | 2216 | if (sdp->try_rc_10_first) |
| 2217 | return 0; |
Matthew Wilcox | 2b30130 | 2009-03-12 14:20:30 -0400 | [diff] [blame] | 2218 | if (sdp->scsi_level > SCSI_SPC_2) |
| 2219 | return 1; |
| 2220 | if (scsi_device_protection(sdp)) |
| 2221 | return 1; |
| 2222 | return 0; |
| 2223 | } |
| 2224 | |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2225 | /* |
| 2226 | * read disk capacity |
| 2227 | */ |
| 2228 | static void |
| 2229 | sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer) |
| 2230 | { |
| 2231 | int sector_size; |
| 2232 | struct scsi_device *sdp = sdkp->device; |
Martin K. Petersen | 70a9b87 | 2009-03-09 11:33:31 -0400 | [diff] [blame] | 2233 | sector_t old_capacity = sdkp->capacity; |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2234 | |
Matthew Wilcox | 2b30130 | 2009-03-12 14:20:30 -0400 | [diff] [blame] | 2235 | if (sd_try_rc16_first(sdp)) { |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2236 | sector_size = read_capacity_16(sdkp, sdp, buffer); |
| 2237 | if (sector_size == -EOVERFLOW) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2238 | goto got_data; |
Matthew Wilcox | 2b30130 | 2009-03-12 14:20:30 -0400 | [diff] [blame] | 2239 | if (sector_size == -ENODEV) |
| 2240 | return; |
| 2241 | if (sector_size < 0) |
| 2242 | sector_size = read_capacity_10(sdkp, sdp, buffer); |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2243 | if (sector_size < 0) |
| 2244 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2245 | } else { |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2246 | sector_size = read_capacity_10(sdkp, sdp, buffer); |
| 2247 | if (sector_size == -EOVERFLOW) |
| 2248 | goto got_data; |
| 2249 | if (sector_size < 0) |
| 2250 | return; |
| 2251 | if ((sizeof(sdkp->capacity) > 4) && |
| 2252 | (sdkp->capacity > 0xffffffffULL)) { |
| 2253 | int old_sector_size = sector_size; |
| 2254 | sd_printk(KERN_NOTICE, sdkp, "Very big device. " |
| 2255 | "Trying to use READ CAPACITY(16).\n"); |
| 2256 | sector_size = read_capacity_16(sdkp, sdp, buffer); |
| 2257 | if (sector_size < 0) { |
| 2258 | sd_printk(KERN_NOTICE, sdkp, |
| 2259 | "Using 0xffffffff as device size\n"); |
| 2260 | sdkp->capacity = 1 + (sector_t) 0xffffffff; |
| 2261 | sector_size = old_sector_size; |
| 2262 | goto got_data; |
| 2263 | } |
| 2264 | } |
| 2265 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2266 | |
Alan Stern | 5c211ca | 2009-02-18 10:54:44 -0500 | [diff] [blame] | 2267 | /* Some devices are known to return the total number of blocks, |
| 2268 | * not the highest block number. Some devices have versions |
| 2269 | * which do this and others which do not. Some devices we might |
| 2270 | * suspect of doing this but we don't know for certain. |
| 2271 | * |
| 2272 | * If we know the reported capacity is wrong, decrement it. If |
| 2273 | * we can only guess, then assume the number of blocks is even |
| 2274 | * (usually true but not always) and err on the side of lowering |
| 2275 | * the capacity. |
| 2276 | */ |
| 2277 | if (sdp->fix_capacity || |
| 2278 | (sdp->guess_capacity && (sdkp->capacity & 0x01))) { |
| 2279 | sd_printk(KERN_INFO, sdkp, "Adjusting the sector count " |
| 2280 | "from its reported value: %llu\n", |
| 2281 | (unsigned long long) sdkp->capacity); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2282 | --sdkp->capacity; |
Oliver Neukum | 61bf54b | 2007-02-08 09:04:48 +0100 | [diff] [blame] | 2283 | } |
| 2284 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2285 | got_data: |
| 2286 | if (sector_size == 0) { |
| 2287 | sector_size = 512; |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 2288 | sd_printk(KERN_NOTICE, sdkp, "Sector size 0 reported, " |
| 2289 | "assuming 512.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2290 | } |
| 2291 | |
| 2292 | if (sector_size != 512 && |
| 2293 | sector_size != 1024 && |
| 2294 | sector_size != 2048 && |
Mark Hounschell | 74856fb | 2015-05-13 10:49:09 +0200 | [diff] [blame] | 2295 | sector_size != 4096) { |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 2296 | sd_printk(KERN_NOTICE, sdkp, "Unsupported sector size %d.\n", |
| 2297 | sector_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2298 | /* |
| 2299 | * The user might want to re-format the drive with |
| 2300 | * a supported sectorsize. Once this happens, it |
| 2301 | * would be relatively trivial to set the thing up. |
| 2302 | * For this reason, we leave the thing in the table. |
| 2303 | */ |
| 2304 | sdkp->capacity = 0; |
| 2305 | /* |
| 2306 | * set a bogus sector size so the normal read/write |
| 2307 | * logic in the block layer will eventually refuse any |
| 2308 | * request on this device without tripping over power |
| 2309 | * of two sector size assumptions |
| 2310 | */ |
| 2311 | sector_size = 512; |
| 2312 | } |
Martin K. Petersen | e1defc4 | 2009-05-22 17:17:49 -0400 | [diff] [blame] | 2313 | blk_queue_logical_block_size(sdp->request_queue, sector_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2314 | |
James Bottomley | 7404ad3b | 2008-08-31 10:41:52 -0500 | [diff] [blame] | 2315 | { |
| 2316 | char cap_str_2[10], cap_str_10[10]; |
James Bottomley | 7404ad3b | 2008-08-31 10:41:52 -0500 | [diff] [blame] | 2317 | |
James Bottomley | b9f28d8 | 2015-03-05 18:47:01 -0800 | [diff] [blame] | 2318 | string_get_size(sdkp->capacity, sector_size, |
| 2319 | STRING_UNITS_2, cap_str_2, sizeof(cap_str_2)); |
| 2320 | string_get_size(sdkp->capacity, sector_size, |
| 2321 | STRING_UNITS_10, cap_str_10, |
James Bottomley | 7404ad3b | 2008-08-31 10:41:52 -0500 | [diff] [blame] | 2322 | sizeof(cap_str_10)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2323 | |
Martin K. Petersen | ea09bcc | 2009-05-23 11:43:37 -0400 | [diff] [blame] | 2324 | if (sdkp->first_scan || old_capacity != sdkp->capacity) { |
Martin K. Petersen | 70a9b87 | 2009-03-09 11:33:31 -0400 | [diff] [blame] | 2325 | sd_printk(KERN_NOTICE, sdkp, |
Martin K. Petersen | ea09bcc | 2009-05-23 11:43:37 -0400 | [diff] [blame] | 2326 | "%llu %d-byte logical blocks: (%s/%s)\n", |
Martin K. Petersen | 70a9b87 | 2009-03-09 11:33:31 -0400 | [diff] [blame] | 2327 | (unsigned long long)sdkp->capacity, |
| 2328 | sector_size, cap_str_10, cap_str_2); |
Martin K. Petersen | ea09bcc | 2009-05-23 11:43:37 -0400 | [diff] [blame] | 2329 | |
Martin K. Petersen | 526f7c7 | 2010-09-28 14:48:47 -0400 | [diff] [blame] | 2330 | if (sdkp->physical_block_size != sector_size) |
Martin K. Petersen | ea09bcc | 2009-05-23 11:43:37 -0400 | [diff] [blame] | 2331 | sd_printk(KERN_NOTICE, sdkp, |
| 2332 | "%u-byte physical blocks\n", |
Martin K. Petersen | 526f7c7 | 2010-09-28 14:48:47 -0400 | [diff] [blame] | 2333 | sdkp->physical_block_size); |
Martin K. Petersen | ea09bcc | 2009-05-23 11:43:37 -0400 | [diff] [blame] | 2334 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2335 | } |
| 2336 | |
Martin K. Petersen | ca369d5 | 2015-11-13 16:46:48 -0500 | [diff] [blame] | 2337 | if (sdkp->capacity > 0xffffffff) |
Martin K. Petersen | bcdb247 | 2014-06-03 18:45:51 -0400 | [diff] [blame] | 2338 | sdp->use_16_for_rw = 1; |
Jason J. Herne | 53ad570 | 2012-11-14 17:03:22 -0500 | [diff] [blame] | 2339 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2340 | /* Rescale capacity to 512-byte units */ |
| 2341 | if (sector_size == 4096) |
| 2342 | sdkp->capacity <<= 3; |
| 2343 | else if (sector_size == 2048) |
| 2344 | sdkp->capacity <<= 2; |
| 2345 | else if (sector_size == 1024) |
| 2346 | sdkp->capacity <<= 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2347 | |
Martin K. Petersen | 526f7c7 | 2010-09-28 14:48:47 -0400 | [diff] [blame] | 2348 | blk_queue_physical_block_size(sdp->request_queue, |
| 2349 | sdkp->physical_block_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2350 | sdkp->device->sector_size = sector_size; |
| 2351 | } |
| 2352 | |
| 2353 | /* called with buffer of length 512 */ |
| 2354 | static inline int |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 2355 | sd_do_mode_sense(struct scsi_device *sdp, int dbd, int modepage, |
| 2356 | unsigned char *buffer, int len, struct scsi_mode_data *data, |
| 2357 | struct scsi_sense_hdr *sshdr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2358 | { |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 2359 | return scsi_mode_sense(sdp, dbd, modepage, buffer, len, |
James Bottomley | 1cf7269 | 2005-08-28 11:27:01 -0500 | [diff] [blame] | 2360 | SD_TIMEOUT, SD_MAX_RETRIES, data, |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 2361 | sshdr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2362 | } |
| 2363 | |
| 2364 | /* |
| 2365 | * read write protect setting, if possible - called only in sd_revalidate_disk() |
Al Viro | 4897080 | 2006-02-26 08:34:10 -0600 | [diff] [blame] | 2366 | * called with buffer of length SD_BUF_SIZE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2367 | */ |
| 2368 | static void |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 2369 | sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer) |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 2370 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2371 | int res; |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 2372 | struct scsi_device *sdp = sdkp->device; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2373 | struct scsi_mode_data data; |
Martin K. Petersen | 70a9b87 | 2009-03-09 11:33:31 -0400 | [diff] [blame] | 2374 | int old_wp = sdkp->write_prot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2375 | |
| 2376 | set_disk_ro(sdkp->disk, 0); |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 2377 | if (sdp->skip_ms_page_3f) { |
Martin K. Petersen | b2bff6c | 2014-01-03 18:19:26 -0500 | [diff] [blame] | 2378 | sd_first_printk(KERN_NOTICE, sdkp, "Assuming Write Enabled\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2379 | return; |
| 2380 | } |
| 2381 | |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 2382 | if (sdp->use_192_bytes_for_3f) { |
| 2383 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 192, &data, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2384 | } else { |
| 2385 | /* |
| 2386 | * First attempt: ask for all pages (0x3F), but only 4 bytes. |
| 2387 | * We have to start carefully: some devices hang if we ask |
| 2388 | * for more than is available. |
| 2389 | */ |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 2390 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 4, &data, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2391 | |
| 2392 | /* |
| 2393 | * Second attempt: ask for page 0 When only page 0 is |
| 2394 | * implemented, a request for page 3F may return Sense Key |
| 2395 | * 5: Illegal Request, Sense Code 24: Invalid field in |
| 2396 | * CDB. |
| 2397 | */ |
| 2398 | if (!scsi_status_is_good(res)) |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 2399 | res = sd_do_mode_sense(sdp, 0, 0, buffer, 4, &data, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2400 | |
| 2401 | /* |
| 2402 | * Third attempt: ask 255 bytes, as we did earlier. |
| 2403 | */ |
| 2404 | if (!scsi_status_is_good(res)) |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 2405 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 255, |
| 2406 | &data, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2407 | } |
| 2408 | |
| 2409 | if (!scsi_status_is_good(res)) { |
Martin K. Petersen | b2bff6c | 2014-01-03 18:19:26 -0500 | [diff] [blame] | 2410 | sd_first_printk(KERN_WARNING, sdkp, |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 2411 | "Test WP failed, assume Write Enabled\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2412 | } else { |
| 2413 | sdkp->write_prot = ((data.device_specific & 0x80) != 0); |
| 2414 | set_disk_ro(sdkp->disk, sdkp->write_prot); |
Martin K. Petersen | 70a9b87 | 2009-03-09 11:33:31 -0400 | [diff] [blame] | 2415 | if (sdkp->first_scan || old_wp != sdkp->write_prot) { |
| 2416 | sd_printk(KERN_NOTICE, sdkp, "Write Protect is %s\n", |
| 2417 | sdkp->write_prot ? "on" : "off"); |
| 2418 | sd_printk(KERN_DEBUG, sdkp, |
| 2419 | "Mode Sense: %02x %02x %02x %02x\n", |
| 2420 | buffer[0], buffer[1], buffer[2], buffer[3]); |
| 2421 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2422 | } |
| 2423 | } |
| 2424 | |
| 2425 | /* |
| 2426 | * sd_read_cache_type - called only from sd_revalidate_disk() |
Al Viro | 4897080 | 2006-02-26 08:34:10 -0600 | [diff] [blame] | 2427 | * called with buffer of length SD_BUF_SIZE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2428 | */ |
| 2429 | static void |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 2430 | sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer) |
Al Viro | 631e8a1 | 2005-05-16 01:59:55 +0100 | [diff] [blame] | 2431 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2432 | int len = 0, res; |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 2433 | struct scsi_device *sdp = sdkp->device; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2434 | |
Al Viro | 631e8a1 | 2005-05-16 01:59:55 +0100 | [diff] [blame] | 2435 | int dbd; |
| 2436 | int modepage; |
Luben Tuikov | 0bcaa11 | 2011-05-19 00:00:58 -0700 | [diff] [blame] | 2437 | int first_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2438 | struct scsi_mode_data data; |
| 2439 | struct scsi_sense_hdr sshdr; |
Martin K. Petersen | 70a9b87 | 2009-03-09 11:33:31 -0400 | [diff] [blame] | 2440 | int old_wce = sdkp->WCE; |
| 2441 | int old_rcd = sdkp->RCD; |
| 2442 | int old_dpofua = sdkp->DPOFUA; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2443 | |
James Bottomley | 39c60a0 | 2013-04-24 14:02:53 -0700 | [diff] [blame] | 2444 | |
| 2445 | if (sdkp->cache_override) |
| 2446 | return; |
| 2447 | |
Luben Tuikov | 0bcaa11 | 2011-05-19 00:00:58 -0700 | [diff] [blame] | 2448 | first_len = 4; |
| 2449 | if (sdp->skip_ms_page_8) { |
| 2450 | if (sdp->type == TYPE_RBC) |
| 2451 | goto defaults; |
| 2452 | else { |
| 2453 | if (sdp->skip_ms_page_3f) |
| 2454 | goto defaults; |
| 2455 | modepage = 0x3F; |
| 2456 | if (sdp->use_192_bytes_for_3f) |
| 2457 | first_len = 192; |
| 2458 | dbd = 0; |
| 2459 | } |
| 2460 | } else if (sdp->type == TYPE_RBC) { |
Al Viro | 631e8a1 | 2005-05-16 01:59:55 +0100 | [diff] [blame] | 2461 | modepage = 6; |
| 2462 | dbd = 8; |
| 2463 | } else { |
| 2464 | modepage = 8; |
| 2465 | dbd = 0; |
| 2466 | } |
| 2467 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2468 | /* cautiously ask */ |
Luben Tuikov | 0bcaa11 | 2011-05-19 00:00:58 -0700 | [diff] [blame] | 2469 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, first_len, |
| 2470 | &data, &sshdr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2471 | |
| 2472 | if (!scsi_status_is_good(res)) |
| 2473 | goto bad_sense; |
| 2474 | |
Al Viro | 6d73c85 | 2006-02-23 02:03:16 +0100 | [diff] [blame] | 2475 | if (!data.header_length) { |
| 2476 | modepage = 6; |
Luben Tuikov | 0bcaa11 | 2011-05-19 00:00:58 -0700 | [diff] [blame] | 2477 | first_len = 0; |
Martin K. Petersen | b2bff6c | 2014-01-03 18:19:26 -0500 | [diff] [blame] | 2478 | sd_first_printk(KERN_ERR, sdkp, |
| 2479 | "Missing header in MODE_SENSE response\n"); |
Al Viro | 6d73c85 | 2006-02-23 02:03:16 +0100 | [diff] [blame] | 2480 | } |
| 2481 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2482 | /* that went OK, now ask for the proper length */ |
| 2483 | len = data.length; |
| 2484 | |
| 2485 | /* |
| 2486 | * We're only interested in the first three bytes, actually. |
| 2487 | * But the data cache page is defined for the first 20. |
| 2488 | */ |
| 2489 | if (len < 3) |
| 2490 | goto bad_sense; |
Luben Tuikov | 0bcaa11 | 2011-05-19 00:00:58 -0700 | [diff] [blame] | 2491 | else if (len > SD_BUF_SIZE) { |
Martin K. Petersen | b2bff6c | 2014-01-03 18:19:26 -0500 | [diff] [blame] | 2492 | sd_first_printk(KERN_NOTICE, sdkp, "Truncating mode parameter " |
Luben Tuikov | 0bcaa11 | 2011-05-19 00:00:58 -0700 | [diff] [blame] | 2493 | "data from %d to %d bytes\n", len, SD_BUF_SIZE); |
| 2494 | len = SD_BUF_SIZE; |
| 2495 | } |
| 2496 | if (modepage == 0x3F && sdp->use_192_bytes_for_3f) |
| 2497 | len = 192; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2498 | |
| 2499 | /* Get the data */ |
Luben Tuikov | 0bcaa11 | 2011-05-19 00:00:58 -0700 | [diff] [blame] | 2500 | if (len > first_len) |
| 2501 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, len, |
| 2502 | &data, &sshdr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2503 | |
| 2504 | if (scsi_status_is_good(res)) { |
Al Viro | 631e8a1 | 2005-05-16 01:59:55 +0100 | [diff] [blame] | 2505 | int offset = data.header_length + data.block_descriptor_length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2506 | |
Luben Tuikov | 0bcaa11 | 2011-05-19 00:00:58 -0700 | [diff] [blame] | 2507 | while (offset < len) { |
| 2508 | u8 page_code = buffer[offset] & 0x3F; |
| 2509 | u8 spf = buffer[offset] & 0x40; |
| 2510 | |
| 2511 | if (page_code == 8 || page_code == 6) { |
| 2512 | /* We're interested only in the first 3 bytes. |
| 2513 | */ |
| 2514 | if (len - offset <= 2) { |
Martin K. Petersen | b2bff6c | 2014-01-03 18:19:26 -0500 | [diff] [blame] | 2515 | sd_first_printk(KERN_ERR, sdkp, |
| 2516 | "Incomplete mode parameter " |
| 2517 | "data\n"); |
Luben Tuikov | 0bcaa11 | 2011-05-19 00:00:58 -0700 | [diff] [blame] | 2518 | goto defaults; |
| 2519 | } else { |
| 2520 | modepage = page_code; |
| 2521 | goto Page_found; |
| 2522 | } |
| 2523 | } else { |
| 2524 | /* Go to the next page */ |
| 2525 | if (spf && len - offset > 3) |
| 2526 | offset += 4 + (buffer[offset+2] << 8) + |
| 2527 | buffer[offset+3]; |
| 2528 | else if (!spf && len - offset > 1) |
| 2529 | offset += 2 + buffer[offset+1]; |
| 2530 | else { |
Martin K. Petersen | b2bff6c | 2014-01-03 18:19:26 -0500 | [diff] [blame] | 2531 | sd_first_printk(KERN_ERR, sdkp, |
| 2532 | "Incomplete mode " |
| 2533 | "parameter data\n"); |
Luben Tuikov | 0bcaa11 | 2011-05-19 00:00:58 -0700 | [diff] [blame] | 2534 | goto defaults; |
| 2535 | } |
| 2536 | } |
Al Viro | 4897080 | 2006-02-26 08:34:10 -0600 | [diff] [blame] | 2537 | } |
| 2538 | |
Martin K. Petersen | b2bff6c | 2014-01-03 18:19:26 -0500 | [diff] [blame] | 2539 | sd_first_printk(KERN_ERR, sdkp, "No Caching mode page found\n"); |
Alan Stern | 984f173 | 2013-09-06 11:49:51 -0400 | [diff] [blame] | 2540 | goto defaults; |
| 2541 | |
Luben Tuikov | 0bcaa11 | 2011-05-19 00:00:58 -0700 | [diff] [blame] | 2542 | Page_found: |
Al Viro | 631e8a1 | 2005-05-16 01:59:55 +0100 | [diff] [blame] | 2543 | if (modepage == 8) { |
| 2544 | sdkp->WCE = ((buffer[offset + 2] & 0x04) != 0); |
| 2545 | sdkp->RCD = ((buffer[offset + 2] & 0x01) != 0); |
| 2546 | } else { |
| 2547 | sdkp->WCE = ((buffer[offset + 2] & 0x01) == 0); |
| 2548 | sdkp->RCD = 0; |
| 2549 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2550 | |
Tejun Heo | 007365a | 2006-01-06 09:53:52 +0100 | [diff] [blame] | 2551 | sdkp->DPOFUA = (data.device_specific & 0x10) != 0; |
Alan Stern | b14bf2d | 2014-06-30 11:04:21 -0400 | [diff] [blame] | 2552 | if (sdp->broken_fua) { |
| 2553 | sd_first_printk(KERN_NOTICE, sdkp, "Disabling FUA\n"); |
| 2554 | sdkp->DPOFUA = 0; |
| 2555 | } else if (sdkp->DPOFUA && !sdkp->device->use_10_for_rw) { |
Martin K. Petersen | b2bff6c | 2014-01-03 18:19:26 -0500 | [diff] [blame] | 2556 | sd_first_printk(KERN_NOTICE, sdkp, |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 2557 | "Uses READ/WRITE(6), disabling FUA\n"); |
Tejun Heo | 007365a | 2006-01-06 09:53:52 +0100 | [diff] [blame] | 2558 | sdkp->DPOFUA = 0; |
| 2559 | } |
| 2560 | |
Sujit Reddy Thumma | 2eefd57 | 2014-08-11 15:40:37 +0300 | [diff] [blame] | 2561 | /* No cache flush allowed for write protected devices */ |
| 2562 | if (sdkp->WCE && sdkp->write_prot) |
| 2563 | sdkp->WCE = 0; |
| 2564 | |
Martin K. Petersen | 70a9b87 | 2009-03-09 11:33:31 -0400 | [diff] [blame] | 2565 | if (sdkp->first_scan || old_wce != sdkp->WCE || |
| 2566 | old_rcd != sdkp->RCD || old_dpofua != sdkp->DPOFUA) |
| 2567 | sd_printk(KERN_NOTICE, sdkp, |
| 2568 | "Write cache: %s, read cache: %s, %s\n", |
| 2569 | sdkp->WCE ? "enabled" : "disabled", |
| 2570 | sdkp->RCD ? "disabled" : "enabled", |
| 2571 | sdkp->DPOFUA ? "supports DPO and FUA" |
| 2572 | : "doesn't support DPO or FUA"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2573 | |
| 2574 | return; |
| 2575 | } |
| 2576 | |
| 2577 | bad_sense: |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 2578 | if (scsi_sense_valid(&sshdr) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2579 | sshdr.sense_key == ILLEGAL_REQUEST && |
| 2580 | sshdr.asc == 0x24 && sshdr.ascq == 0x0) |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 2581 | /* Invalid field in CDB */ |
Martin K. Petersen | b2bff6c | 2014-01-03 18:19:26 -0500 | [diff] [blame] | 2582 | sd_first_printk(KERN_NOTICE, sdkp, "Cache data unavailable\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2583 | else |
Martin K. Petersen | b2bff6c | 2014-01-03 18:19:26 -0500 | [diff] [blame] | 2584 | sd_first_printk(KERN_ERR, sdkp, |
| 2585 | "Asking for cache data failed\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2586 | |
| 2587 | defaults: |
Namjae Jeon | b81478d | 2012-07-07 23:05:08 -0400 | [diff] [blame] | 2588 | if (sdp->wce_default_on) { |
Martin K. Petersen | b2bff6c | 2014-01-03 18:19:26 -0500 | [diff] [blame] | 2589 | sd_first_printk(KERN_NOTICE, sdkp, |
| 2590 | "Assuming drive cache: write back\n"); |
Namjae Jeon | b81478d | 2012-07-07 23:05:08 -0400 | [diff] [blame] | 2591 | sdkp->WCE = 1; |
| 2592 | } else { |
Martin K. Petersen | b2bff6c | 2014-01-03 18:19:26 -0500 | [diff] [blame] | 2593 | sd_first_printk(KERN_ERR, sdkp, |
| 2594 | "Assuming drive cache: write through\n"); |
Namjae Jeon | b81478d | 2012-07-07 23:05:08 -0400 | [diff] [blame] | 2595 | sdkp->WCE = 0; |
| 2596 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2597 | sdkp->RCD = 0; |
Al Viro | 4897080 | 2006-02-26 08:34:10 -0600 | [diff] [blame] | 2598 | sdkp->DPOFUA = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2599 | } |
| 2600 | |
Martin K. Petersen | e0597d7 | 2008-07-17 04:28:34 -0400 | [diff] [blame] | 2601 | /* |
| 2602 | * The ATO bit indicates whether the DIF application tag is available |
| 2603 | * for use by the operating system. |
| 2604 | */ |
H Hartley Sweeten | 439d77f | 2010-08-10 18:01:20 -0700 | [diff] [blame] | 2605 | 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] | 2606 | { |
| 2607 | int res, offset; |
| 2608 | struct scsi_device *sdp = sdkp->device; |
| 2609 | struct scsi_mode_data data; |
| 2610 | struct scsi_sense_hdr sshdr; |
| 2611 | |
| 2612 | if (sdp->type != TYPE_DISK) |
| 2613 | return; |
| 2614 | |
| 2615 | if (sdkp->protection_type == 0) |
| 2616 | return; |
| 2617 | |
| 2618 | res = scsi_mode_sense(sdp, 1, 0x0a, buffer, 36, SD_TIMEOUT, |
| 2619 | SD_MAX_RETRIES, &data, &sshdr); |
| 2620 | |
| 2621 | if (!scsi_status_is_good(res) || !data.header_length || |
| 2622 | data.length < 6) { |
Martin K. Petersen | b2bff6c | 2014-01-03 18:19:26 -0500 | [diff] [blame] | 2623 | sd_first_printk(KERN_WARNING, sdkp, |
Martin K. Petersen | e0597d7 | 2008-07-17 04:28:34 -0400 | [diff] [blame] | 2624 | "getting Control mode page failed, assume no ATO\n"); |
| 2625 | |
| 2626 | if (scsi_sense_valid(&sshdr)) |
| 2627 | sd_print_sense_hdr(sdkp, &sshdr); |
| 2628 | |
| 2629 | return; |
| 2630 | } |
| 2631 | |
| 2632 | offset = data.header_length + data.block_descriptor_length; |
| 2633 | |
| 2634 | if ((buffer[offset] & 0x3f) != 0x0a) { |
Martin K. Petersen | b2bff6c | 2014-01-03 18:19:26 -0500 | [diff] [blame] | 2635 | sd_first_printk(KERN_ERR, sdkp, "ATO Got wrong page\n"); |
Martin K. Petersen | e0597d7 | 2008-07-17 04:28:34 -0400 | [diff] [blame] | 2636 | return; |
| 2637 | } |
| 2638 | |
| 2639 | if ((buffer[offset + 5] & 0x80) == 0) |
| 2640 | return; |
| 2641 | |
| 2642 | sdkp->ATO = 1; |
| 2643 | |
| 2644 | return; |
| 2645 | } |
| 2646 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2647 | /** |
Martin K. Petersen | d11b691 | 2009-05-23 11:43:39 -0400 | [diff] [blame] | 2648 | * sd_read_block_limits - Query disk device for preferred I/O sizes. |
| 2649 | * @disk: disk to query |
| 2650 | */ |
| 2651 | static void sd_read_block_limits(struct scsi_disk *sdkp) |
| 2652 | { |
| 2653 | unsigned int sector_sz = sdkp->device->sector_size; |
Martin K. Petersen | bb2d3de | 2010-03-02 08:44:34 -0500 | [diff] [blame] | 2654 | const int vpd_len = 64; |
James Bottomley | e3deec0 | 2009-11-03 12:33:07 -0600 | [diff] [blame] | 2655 | unsigned char *buffer = kmalloc(vpd_len, GFP_KERNEL); |
Martin K. Petersen | d11b691 | 2009-05-23 11:43:39 -0400 | [diff] [blame] | 2656 | |
James Bottomley | e3deec0 | 2009-11-03 12:33:07 -0600 | [diff] [blame] | 2657 | if (!buffer || |
| 2658 | /* Block Limits VPD */ |
| 2659 | scsi_get_vpd_page(sdkp->device, 0xb0, buffer, vpd_len)) |
| 2660 | goto out; |
Martin K. Petersen | d11b691 | 2009-05-23 11:43:39 -0400 | [diff] [blame] | 2661 | |
| 2662 | blk_queue_io_min(sdkp->disk->queue, |
| 2663 | get_unaligned_be16(&buffer[6]) * sector_sz); |
Martin K. Petersen | ca369d5 | 2015-11-13 16:46:48 -0500 | [diff] [blame] | 2664 | |
| 2665 | sdkp->max_xfer_blocks = get_unaligned_be32(&buffer[8]); |
| 2666 | sdkp->opt_xfer_blocks = get_unaligned_be32(&buffer[12]); |
Martin K. Petersen | d11b691 | 2009-05-23 11:43:39 -0400 | [diff] [blame] | 2667 | |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 2668 | if (buffer[3] == 0x3c) { |
| 2669 | unsigned int lba_count, desc_count; |
| 2670 | |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 2671 | sdkp->max_ws_blocks = (u32)get_unaligned_be64(&buffer[36]); |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 2672 | |
| 2673 | if (!sdkp->lbpme) |
| 2674 | goto out; |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 2675 | |
| 2676 | lba_count = get_unaligned_be32(&buffer[20]); |
| 2677 | desc_count = get_unaligned_be32(&buffer[24]); |
| 2678 | |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 2679 | if (lba_count && desc_count) |
| 2680 | sdkp->max_unmap_blocks = lba_count; |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 2681 | |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 2682 | sdkp->unmap_granularity = get_unaligned_be32(&buffer[28]); |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 2683 | |
| 2684 | if (buffer[32] & 0x80) |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 2685 | sdkp->unmap_alignment = |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 2686 | get_unaligned_be32(&buffer[32]) & ~(1 << 31); |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 2687 | |
| 2688 | if (!sdkp->lbpvpd) { /* LBP VPD page not provided */ |
| 2689 | |
| 2690 | if (sdkp->max_unmap_blocks) |
| 2691 | sd_config_discard(sdkp, SD_LBP_UNMAP); |
| 2692 | else |
| 2693 | sd_config_discard(sdkp, SD_LBP_WS16); |
| 2694 | |
| 2695 | } else { /* LBP VPD page tells us what to use */ |
Martin K. Petersen | e461338 | 2014-12-05 08:58:03 -0500 | [diff] [blame] | 2696 | if (sdkp->lbpu && sdkp->max_unmap_blocks && !sdkp->lbprz) |
| 2697 | sd_config_discard(sdkp, SD_LBP_UNMAP); |
| 2698 | else if (sdkp->lbpws) |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 2699 | sd_config_discard(sdkp, SD_LBP_WS16); |
| 2700 | else if (sdkp->lbpws10) |
| 2701 | sd_config_discard(sdkp, SD_LBP_WS10); |
Martin K. Petersen | 7985090 | 2014-11-07 00:08:13 -0500 | [diff] [blame] | 2702 | else if (sdkp->lbpu && sdkp->max_unmap_blocks) |
| 2703 | sd_config_discard(sdkp, SD_LBP_UNMAP); |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 2704 | else |
| 2705 | sd_config_discard(sdkp, SD_LBP_DISABLE); |
| 2706 | } |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 2707 | } |
| 2708 | |
James Bottomley | e3deec0 | 2009-11-03 12:33:07 -0600 | [diff] [blame] | 2709 | out: |
Martin K. Petersen | d11b691 | 2009-05-23 11:43:39 -0400 | [diff] [blame] | 2710 | kfree(buffer); |
| 2711 | } |
| 2712 | |
| 2713 | /** |
Martin K. Petersen | 3821d76 | 2009-05-23 11:43:38 -0400 | [diff] [blame] | 2714 | * sd_read_block_characteristics - Query block dev. characteristics |
| 2715 | * @disk: disk to query |
| 2716 | */ |
| 2717 | static void sd_read_block_characteristics(struct scsi_disk *sdkp) |
| 2718 | { |
James Bottomley | e3deec0 | 2009-11-03 12:33:07 -0600 | [diff] [blame] | 2719 | unsigned char *buffer; |
Martin K. Petersen | 3821d76 | 2009-05-23 11:43:38 -0400 | [diff] [blame] | 2720 | u16 rot; |
Martin K. Petersen | bb2d3de | 2010-03-02 08:44:34 -0500 | [diff] [blame] | 2721 | const int vpd_len = 64; |
Martin K. Petersen | 3821d76 | 2009-05-23 11:43:38 -0400 | [diff] [blame] | 2722 | |
James Bottomley | e3deec0 | 2009-11-03 12:33:07 -0600 | [diff] [blame] | 2723 | buffer = kmalloc(vpd_len, GFP_KERNEL); |
Martin K. Petersen | 3821d76 | 2009-05-23 11:43:38 -0400 | [diff] [blame] | 2724 | |
James Bottomley | e3deec0 | 2009-11-03 12:33:07 -0600 | [diff] [blame] | 2725 | if (!buffer || |
| 2726 | /* Block Device Characteristics VPD */ |
| 2727 | scsi_get_vpd_page(sdkp->device, 0xb1, buffer, vpd_len)) |
| 2728 | goto out; |
Martin K. Petersen | 3821d76 | 2009-05-23 11:43:38 -0400 | [diff] [blame] | 2729 | |
| 2730 | rot = get_unaligned_be16(&buffer[4]); |
| 2731 | |
Mike Snitzer | b277da0 | 2014-10-04 10:55:32 -0600 | [diff] [blame] | 2732 | if (rot == 1) { |
Martin K. Petersen | 3821d76 | 2009-05-23 11:43:38 -0400 | [diff] [blame] | 2733 | queue_flag_set_unlocked(QUEUE_FLAG_NONROT, sdkp->disk->queue); |
Mike Snitzer | b277da0 | 2014-10-04 10:55:32 -0600 | [diff] [blame] | 2734 | queue_flag_clear_unlocked(QUEUE_FLAG_ADD_RANDOM, sdkp->disk->queue); |
| 2735 | } |
Martin K. Petersen | 3821d76 | 2009-05-23 11:43:38 -0400 | [diff] [blame] | 2736 | |
James Bottomley | e3deec0 | 2009-11-03 12:33:07 -0600 | [diff] [blame] | 2737 | out: |
Martin K. Petersen | 3821d76 | 2009-05-23 11:43:38 -0400 | [diff] [blame] | 2738 | kfree(buffer); |
| 2739 | } |
| 2740 | |
Martin K. Petersen | 045d3fe | 2010-09-10 01:22:07 -0400 | [diff] [blame] | 2741 | /** |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 2742 | * sd_read_block_provisioning - Query provisioning VPD page |
Martin K. Petersen | 045d3fe | 2010-09-10 01:22:07 -0400 | [diff] [blame] | 2743 | * @disk: disk to query |
| 2744 | */ |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 2745 | static void sd_read_block_provisioning(struct scsi_disk *sdkp) |
Martin K. Petersen | 045d3fe | 2010-09-10 01:22:07 -0400 | [diff] [blame] | 2746 | { |
| 2747 | unsigned char *buffer; |
| 2748 | const int vpd_len = 8; |
| 2749 | |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 2750 | if (sdkp->lbpme == 0) |
Martin K. Petersen | 045d3fe | 2010-09-10 01:22:07 -0400 | [diff] [blame] | 2751 | return; |
| 2752 | |
| 2753 | buffer = kmalloc(vpd_len, GFP_KERNEL); |
| 2754 | |
| 2755 | if (!buffer || scsi_get_vpd_page(sdkp->device, 0xb2, buffer, vpd_len)) |
| 2756 | goto out; |
| 2757 | |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 2758 | sdkp->lbpvpd = 1; |
| 2759 | sdkp->lbpu = (buffer[5] >> 7) & 1; /* UNMAP */ |
| 2760 | sdkp->lbpws = (buffer[5] >> 6) & 1; /* WRITE SAME(16) with UNMAP */ |
| 2761 | sdkp->lbpws10 = (buffer[5] >> 5) & 1; /* WRITE SAME(10) with UNMAP */ |
Martin K. Petersen | 045d3fe | 2010-09-10 01:22:07 -0400 | [diff] [blame] | 2762 | |
| 2763 | out: |
| 2764 | kfree(buffer); |
| 2765 | } |
| 2766 | |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 2767 | static void sd_read_write_same(struct scsi_disk *sdkp, unsigned char *buffer) |
| 2768 | { |
Martin K. Petersen | 66c28f9 | 2013-06-06 22:15:55 -0400 | [diff] [blame] | 2769 | struct scsi_device *sdev = sdkp->device; |
| 2770 | |
Martin K. Petersen | 54b2b50 | 2013-10-23 06:25:40 -0400 | [diff] [blame] | 2771 | if (sdev->host->no_write_same) { |
| 2772 | sdev->no_write_same = 1; |
| 2773 | |
| 2774 | return; |
| 2775 | } |
| 2776 | |
Martin K. Petersen | 66c28f9 | 2013-06-06 22:15:55 -0400 | [diff] [blame] | 2777 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, INQUIRY) < 0) { |
Bernd Schubert | af73623 | 2013-09-23 14:47:32 +0200 | [diff] [blame] | 2778 | /* too large values might cause issues with arcmsr */ |
| 2779 | int vpd_buf_len = 64; |
| 2780 | |
Martin K. Petersen | 66c28f9 | 2013-06-06 22:15:55 -0400 | [diff] [blame] | 2781 | sdev->no_report_opcodes = 1; |
| 2782 | |
| 2783 | /* Disable WRITE SAME if REPORT SUPPORTED OPERATION |
| 2784 | * CODES is unsupported and the device has an ATA |
| 2785 | * Information VPD page (SAT). |
| 2786 | */ |
Bernd Schubert | af73623 | 2013-09-23 14:47:32 +0200 | [diff] [blame] | 2787 | if (!scsi_get_vpd_page(sdev, 0x89, buffer, vpd_buf_len)) |
Martin K. Petersen | 66c28f9 | 2013-06-06 22:15:55 -0400 | [diff] [blame] | 2788 | sdev->no_write_same = 1; |
| 2789 | } |
| 2790 | |
| 2791 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME_16) == 1) |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 2792 | sdkp->ws16 = 1; |
Martin K. Petersen | 66c28f9 | 2013-06-06 22:15:55 -0400 | [diff] [blame] | 2793 | |
| 2794 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME) == 1) |
| 2795 | sdkp->ws10 = 1; |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 2796 | } |
| 2797 | |
Martin K. Petersen | ffd4bc2 | 2009-07-29 14:06:53 -0400 | [diff] [blame] | 2798 | static int sd_try_extended_inquiry(struct scsi_device *sdp) |
| 2799 | { |
Martin K. Petersen | c1d40a5 | 2014-07-15 12:49:17 -0400 | [diff] [blame] | 2800 | /* Attempt VPD inquiry if the device blacklist explicitly calls |
| 2801 | * for it. |
| 2802 | */ |
| 2803 | if (sdp->try_vpd_pages) |
| 2804 | return 1; |
Martin K. Petersen | ffd4bc2 | 2009-07-29 14:06:53 -0400 | [diff] [blame] | 2805 | /* |
| 2806 | * Although VPD inquiries can go to SCSI-2 type devices, |
| 2807 | * some USB ones crash on receiving them, and the pages |
| 2808 | * we currently ask for are for SPC-3 and beyond |
| 2809 | */ |
Alan Stern | 09b6b51 | 2012-01-10 13:43:30 -0500 | [diff] [blame] | 2810 | if (sdp->scsi_level > SCSI_SPC_2 && !sdp->skip_vpd_pages) |
Martin K. Petersen | ffd4bc2 | 2009-07-29 14:06:53 -0400 | [diff] [blame] | 2811 | return 1; |
| 2812 | return 0; |
| 2813 | } |
| 2814 | |
Martin K. Petersen | ca369d5 | 2015-11-13 16:46:48 -0500 | [diff] [blame] | 2815 | static inline u32 logical_to_sectors(struct scsi_device *sdev, u32 blocks) |
| 2816 | { |
| 2817 | return blocks << (ilog2(sdev->sector_size) - 9); |
| 2818 | } |
| 2819 | |
Martin K. Petersen | 3821d76 | 2009-05-23 11:43:38 -0400 | [diff] [blame] | 2820 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2821 | * sd_revalidate_disk - called the first time a new disk is seen, |
| 2822 | * performs disk spin up, read_capacity, etc. |
| 2823 | * @disk: struct gendisk we care about |
| 2824 | **/ |
| 2825 | static int sd_revalidate_disk(struct gendisk *disk) |
| 2826 | { |
| 2827 | struct scsi_disk *sdkp = scsi_disk(disk); |
| 2828 | struct scsi_device *sdp = sdkp->device; |
Martin K. Petersen | ca369d5 | 2015-11-13 16:46:48 -0500 | [diff] [blame] | 2829 | struct request_queue *q = sdkp->disk->queue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2830 | unsigned char *buffer; |
Martin K. Petersen | ca369d5 | 2015-11-13 16:46:48 -0500 | [diff] [blame] | 2831 | unsigned int dev_max, rw_max; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2832 | |
Martin K. Petersen | fa0d34b | 2007-02-27 22:41:19 -0500 | [diff] [blame] | 2833 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, |
| 2834 | "sd_revalidate_disk\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2835 | |
| 2836 | /* |
| 2837 | * If the device is offline, don't try and read capacity or any |
| 2838 | * of the other niceties. |
| 2839 | */ |
| 2840 | if (!scsi_device_online(sdp)) |
| 2841 | goto out; |
| 2842 | |
Bernhard Walle | a6123f1 | 2007-05-21 17:15:26 +0200 | [diff] [blame] | 2843 | buffer = kmalloc(SD_BUF_SIZE, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2844 | if (!buffer) { |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 2845 | sd_printk(KERN_WARNING, sdkp, "sd_revalidate_disk: Memory " |
| 2846 | "allocation failure.\n"); |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 2847 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2848 | } |
| 2849 | |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 2850 | sd_spinup_disk(sdkp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2851 | |
| 2852 | /* |
| 2853 | * Without media there is no reason to ask; moreover, some devices |
| 2854 | * react badly if we do. |
| 2855 | */ |
| 2856 | if (sdkp->media_present) { |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 2857 | sd_read_capacity(sdkp, buffer); |
Martin K. Petersen | ffd4bc2 | 2009-07-29 14:06:53 -0400 | [diff] [blame] | 2858 | |
| 2859 | if (sd_try_extended_inquiry(sdp)) { |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 2860 | sd_read_block_provisioning(sdkp); |
Martin K. Petersen | ffd4bc2 | 2009-07-29 14:06:53 -0400 | [diff] [blame] | 2861 | sd_read_block_limits(sdkp); |
| 2862 | sd_read_block_characteristics(sdkp); |
| 2863 | } |
| 2864 | |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 2865 | sd_read_write_protect_flag(sdkp, buffer); |
| 2866 | sd_read_cache_type(sdkp, buffer); |
Martin K. Petersen | e0597d7 | 2008-07-17 04:28:34 -0400 | [diff] [blame] | 2867 | sd_read_app_tag_own(sdkp, buffer); |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 2868 | sd_read_write_same(sdkp, buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2869 | } |
Tejun Heo | 461d4e9 | 2006-01-06 09:52:55 +0100 | [diff] [blame] | 2870 | |
Martin K. Petersen | 70a9b87 | 2009-03-09 11:33:31 -0400 | [diff] [blame] | 2871 | sdkp->first_scan = 0; |
| 2872 | |
Tejun Heo | 461d4e9 | 2006-01-06 09:52:55 +0100 | [diff] [blame] | 2873 | /* |
| 2874 | * We now have all cache related info, determine how we deal |
Tejun Heo | 4913efe | 2010-09-03 11:56:16 +0200 | [diff] [blame] | 2875 | * with flush requests. |
Tejun Heo | 461d4e9 | 2006-01-06 09:52:55 +0100 | [diff] [blame] | 2876 | */ |
Vaughan Cao | cb2fb68 | 2014-06-03 17:37:30 +0800 | [diff] [blame] | 2877 | sd_set_flush_flag(sdkp); |
Tejun Heo | 461d4e9 | 2006-01-06 09:52:55 +0100 | [diff] [blame] | 2878 | |
Martin K. Petersen | ca369d5 | 2015-11-13 16:46:48 -0500 | [diff] [blame] | 2879 | /* Initial block count limit based on CDB TRANSFER LENGTH field size. */ |
| 2880 | dev_max = sdp->use_16_for_rw ? SD_MAX_XFER_BLOCKS : SD_DEF_XFER_BLOCKS; |
Brian King | 3a9794d | 2015-01-29 15:54:40 -0600 | [diff] [blame] | 2881 | |
Martin K. Petersen | ca369d5 | 2015-11-13 16:46:48 -0500 | [diff] [blame] | 2882 | /* Some devices report a maximum block count for READ/WRITE requests. */ |
| 2883 | dev_max = min_not_zero(dev_max, sdkp->max_xfer_blocks); |
| 2884 | q->limits.max_dev_sectors = logical_to_sectors(sdp, dev_max); |
| 2885 | |
| 2886 | /* |
| 2887 | * Use the device's preferred I/O size for reads and writes |
| 2888 | * unless the reported value is unreasonably large (or garbage). |
| 2889 | */ |
| 2890 | if (sdkp->opt_xfer_blocks && sdkp->opt_xfer_blocks <= dev_max && |
| 2891 | sdkp->opt_xfer_blocks <= SD_DEF_XFER_BLOCKS) |
| 2892 | rw_max = q->limits.io_opt = |
| 2893 | logical_to_sectors(sdp, sdkp->opt_xfer_blocks); |
| 2894 | else |
| 2895 | rw_max = BLK_DEF_MAX_SECTORS; |
| 2896 | |
| 2897 | /* Combine with controller limits */ |
| 2898 | q->limits.max_sectors = min(rw_max, queue_max_hw_sectors(q)); |
Martin K. Petersen | 4f258a4 | 2015-06-23 12:13:59 -0400 | [diff] [blame] | 2899 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2900 | set_capacity(disk, sdkp->capacity); |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 2901 | sd_config_write_same(sdkp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2902 | kfree(buffer); |
| 2903 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2904 | out: |
| 2905 | return 0; |
| 2906 | } |
| 2907 | |
| 2908 | /** |
Tejun Heo | 72ec24b | 2010-05-15 20:09:32 +0200 | [diff] [blame] | 2909 | * sd_unlock_native_capacity - unlock native capacity |
| 2910 | * @disk: struct gendisk to set capacity for |
| 2911 | * |
| 2912 | * Block layer calls this function if it detects that partitions |
| 2913 | * on @disk reach beyond the end of the device. If the SCSI host |
| 2914 | * implements ->unlock_native_capacity() method, it's invoked to |
| 2915 | * give it a chance to adjust the device capacity. |
| 2916 | * |
| 2917 | * CONTEXT: |
| 2918 | * Defined by block layer. Might sleep. |
| 2919 | */ |
| 2920 | static void sd_unlock_native_capacity(struct gendisk *disk) |
| 2921 | { |
| 2922 | struct scsi_device *sdev = scsi_disk(disk)->device; |
| 2923 | |
| 2924 | if (sdev->host->hostt->unlock_native_capacity) |
| 2925 | sdev->host->hostt->unlock_native_capacity(sdev); |
| 2926 | } |
| 2927 | |
| 2928 | /** |
Tejun Heo | 3e1a7ff | 2008-08-25 19:56:17 +0900 | [diff] [blame] | 2929 | * sd_format_disk_name - format disk name |
| 2930 | * @prefix: name prefix - ie. "sd" for SCSI disks |
| 2931 | * @index: index of the disk to format name for |
| 2932 | * @buf: output buffer |
| 2933 | * @buflen: length of the output buffer |
| 2934 | * |
| 2935 | * SCSI disk names starts at sda. The 26th device is sdz and the |
| 2936 | * 27th is sdaa. The last one for two lettered suffix is sdzz |
| 2937 | * which is followed by sdaaa. |
| 2938 | * |
| 2939 | * This is basically 26 base counting with one extra 'nil' entry |
Daniel Mack | 3ad2f3f | 2010-02-03 08:01:28 +0800 | [diff] [blame] | 2940 | * at the beginning from the second digit on and can be |
Tejun Heo | 3e1a7ff | 2008-08-25 19:56:17 +0900 | [diff] [blame] | 2941 | * determined using similar method as 26 base conversion with the |
| 2942 | * index shifted -1 after each digit is computed. |
| 2943 | * |
| 2944 | * CONTEXT: |
| 2945 | * Don't care. |
| 2946 | * |
| 2947 | * RETURNS: |
| 2948 | * 0 on success, -errno on failure. |
| 2949 | */ |
| 2950 | static int sd_format_disk_name(char *prefix, int index, char *buf, int buflen) |
| 2951 | { |
| 2952 | const int base = 'z' - 'a' + 1; |
| 2953 | char *begin = buf + strlen(prefix); |
| 2954 | char *end = buf + buflen; |
| 2955 | char *p; |
| 2956 | int unit; |
| 2957 | |
| 2958 | p = end - 1; |
| 2959 | *p = '\0'; |
| 2960 | unit = base; |
| 2961 | do { |
| 2962 | if (p == begin) |
| 2963 | return -EINVAL; |
| 2964 | *--p = 'a' + (index % unit); |
| 2965 | index = (index / unit) - 1; |
| 2966 | } while (index >= 0); |
| 2967 | |
| 2968 | memmove(begin, p, end - p); |
| 2969 | memcpy(buf, prefix, strlen(prefix)); |
| 2970 | |
| 2971 | return 0; |
| 2972 | } |
| 2973 | |
Arjan van de Ven | 4ace92f | 2009-01-04 05:32:28 -0800 | [diff] [blame] | 2974 | /* |
| 2975 | * The asynchronous part of sd_probe |
| 2976 | */ |
| 2977 | static void sd_probe_async(void *data, async_cookie_t cookie) |
| 2978 | { |
| 2979 | struct scsi_disk *sdkp = data; |
| 2980 | struct scsi_device *sdp; |
| 2981 | struct gendisk *gd; |
| 2982 | u32 index; |
| 2983 | struct device *dev; |
| 2984 | |
| 2985 | sdp = sdkp->device; |
| 2986 | gd = sdkp->disk; |
| 2987 | index = sdkp->index; |
| 2988 | dev = &sdp->sdev_gendev; |
| 2989 | |
Michael Reed | 1a03ae0 | 2010-09-20 11:20:22 -0500 | [diff] [blame] | 2990 | gd->major = sd_major((index & 0xf0) >> 4); |
| 2991 | gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00); |
| 2992 | gd->minors = SD_MINORS; |
| 2993 | |
Arjan van de Ven | 4ace92f | 2009-01-04 05:32:28 -0800 | [diff] [blame] | 2994 | gd->fops = &sd_fops; |
| 2995 | gd->private_data = &sdkp->driver; |
| 2996 | gd->queue = sdkp->device->request_queue; |
| 2997 | |
Martin K. Petersen | 70a9b87 | 2009-03-09 11:33:31 -0400 | [diff] [blame] | 2998 | /* defaults, until the device tells us otherwise */ |
| 2999 | sdp->sector_size = 512; |
| 3000 | sdkp->capacity = 0; |
| 3001 | sdkp->media_present = 1; |
| 3002 | sdkp->write_prot = 0; |
James Bottomley | 39c60a0 | 2013-04-24 14:02:53 -0700 | [diff] [blame] | 3003 | sdkp->cache_override = 0; |
Martin K. Petersen | 70a9b87 | 2009-03-09 11:33:31 -0400 | [diff] [blame] | 3004 | sdkp->WCE = 0; |
| 3005 | sdkp->RCD = 0; |
| 3006 | sdkp->ATO = 0; |
| 3007 | sdkp->first_scan = 1; |
Martin K. Petersen | 18a4d0a | 2012-02-09 13:48:53 -0500 | [diff] [blame] | 3008 | sdkp->max_medium_access_timeouts = SD_MAX_MEDIUM_TIMEOUTS; |
Martin K. Petersen | 70a9b87 | 2009-03-09 11:33:31 -0400 | [diff] [blame] | 3009 | |
Arjan van de Ven | 4ace92f | 2009-01-04 05:32:28 -0800 | [diff] [blame] | 3010 | sd_revalidate_disk(gd); |
| 3011 | |
Arjan van de Ven | 4ace92f | 2009-01-04 05:32:28 -0800 | [diff] [blame] | 3012 | gd->driverfs_dev = &sdp->sdev_gendev; |
NeilBrown | 97fedbb | 2010-03-16 08:55:32 +0100 | [diff] [blame] | 3013 | gd->flags = GENHD_FL_EXT_DEVT; |
Tejun Heo | 2bae009 | 2010-12-18 18:42:23 +0100 | [diff] [blame] | 3014 | if (sdp->removable) { |
Arjan van de Ven | 4ace92f | 2009-01-04 05:32:28 -0800 | [diff] [blame] | 3015 | gd->flags |= GENHD_FL_REMOVABLE; |
Tejun Heo | 2bae009 | 2010-12-18 18:42:23 +0100 | [diff] [blame] | 3016 | gd->events |= DISK_EVENT_MEDIA_CHANGE; |
| 3017 | } |
Arjan van de Ven | 4ace92f | 2009-01-04 05:32:28 -0800 | [diff] [blame] | 3018 | |
Aaron Lu | 10c580e | 2013-10-10 13:22:36 +0800 | [diff] [blame] | 3019 | blk_pm_runtime_init(sdp->request_queue, dev); |
Arjan van de Ven | 4ace92f | 2009-01-04 05:32:28 -0800 | [diff] [blame] | 3020 | add_disk(gd); |
Martin K. Petersen | fe54239 | 2012-09-21 12:44:12 -0400 | [diff] [blame] | 3021 | if (sdkp->capacity) |
| 3022 | sd_dif_config_host(sdkp); |
Arjan van de Ven | 4ace92f | 2009-01-04 05:32:28 -0800 | [diff] [blame] | 3023 | |
Martin K. Petersen | 3821d76 | 2009-05-23 11:43:38 -0400 | [diff] [blame] | 3024 | sd_revalidate_disk(gd); |
| 3025 | |
Arjan van de Ven | 4ace92f | 2009-01-04 05:32:28 -0800 | [diff] [blame] | 3026 | sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n", |
| 3027 | sdp->removable ? "removable " : ""); |
Alan Stern | 478a8a0 | 2010-06-16 14:52:17 -0400 | [diff] [blame] | 3028 | scsi_autopm_put_device(sdp); |
James Bottomley | ea038f6 | 2009-08-21 09:47:54 -0600 | [diff] [blame] | 3029 | put_device(&sdkp->dev); |
Arjan van de Ven | 4ace92f | 2009-01-04 05:32:28 -0800 | [diff] [blame] | 3030 | } |
| 3031 | |
Tejun Heo | 3e1a7ff | 2008-08-25 19:56:17 +0900 | [diff] [blame] | 3032 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3033 | * sd_probe - called during driver initialization and whenever a |
| 3034 | * new scsi device is attached to the system. It is called once |
| 3035 | * for each scsi device (not just disks) present. |
| 3036 | * @dev: pointer to device object |
| 3037 | * |
| 3038 | * Returns 0 if successful (or not interested in this scsi device |
| 3039 | * (e.g. scanner)); 1 when there is an error. |
| 3040 | * |
| 3041 | * Note: this function is invoked from the scsi mid-level. |
| 3042 | * This function sets up the mapping between a given |
| 3043 | * <host,channel,id,lun> (found in sdp) and new device name |
| 3044 | * (e.g. /dev/sda). More precisely it is the block device major |
| 3045 | * and minor number that is chosen here. |
| 3046 | * |
Petr Uzel | 2db93ce | 2012-02-24 16:56:54 +0100 | [diff] [blame] | 3047 | * Assume sd_probe is not re-entrant (for time being) |
| 3048 | * Also think about sd_probe() and sd_remove() running coincidentally. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3049 | **/ |
| 3050 | static int sd_probe(struct device *dev) |
| 3051 | { |
| 3052 | struct scsi_device *sdp = to_scsi_device(dev); |
| 3053 | struct scsi_disk *sdkp; |
| 3054 | struct gendisk *gd; |
H Hartley Sweeten | 439d77f | 2010-08-10 18:01:20 -0700 | [diff] [blame] | 3055 | int index; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3056 | int error; |
| 3057 | |
Subhash Jadavani | 6fe8c1d | 2014-09-10 14:54:09 +0300 | [diff] [blame] | 3058 | scsi_autopm_get_device(sdp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3059 | error = -ENODEV; |
Al Viro | 631e8a1 | 2005-05-16 01:59:55 +0100 | [diff] [blame] | 3060 | 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] | 3061 | goto out; |
| 3062 | |
James Bottomley | 9ccfc75 | 2005-10-02 11:45:08 -0500 | [diff] [blame] | 3063 | SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO, sdp, |
Petr Uzel | 2db93ce | 2012-02-24 16:56:54 +0100 | [diff] [blame] | 3064 | "sd_probe\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3065 | |
| 3066 | error = -ENOMEM; |
Jes Sorensen | 24669f75 | 2006-01-16 10:31:18 -0500 | [diff] [blame] | 3067 | sdkp = kzalloc(sizeof(*sdkp), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3068 | if (!sdkp) |
| 3069 | goto out; |
| 3070 | |
Tejun Heo | 689d6fa | 2008-08-25 19:56:16 +0900 | [diff] [blame] | 3071 | gd = alloc_disk(SD_MINORS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3072 | if (!gd) |
| 3073 | goto out_free; |
| 3074 | |
Tejun Heo | f27bac2 | 2008-07-14 14:59:30 +0900 | [diff] [blame] | 3075 | do { |
| 3076 | if (!ida_pre_get(&sd_index_ida, GFP_KERNEL)) |
| 3077 | goto out_put; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3078 | |
Tejun Heo | 4034cc6 | 2009-02-21 11:04:45 +0900 | [diff] [blame] | 3079 | spin_lock(&sd_index_lock); |
Tejun Heo | f27bac2 | 2008-07-14 14:59:30 +0900 | [diff] [blame] | 3080 | error = ida_get_new(&sd_index_ida, &index); |
Tejun Heo | 4034cc6 | 2009-02-21 11:04:45 +0900 | [diff] [blame] | 3081 | spin_unlock(&sd_index_lock); |
Tejun Heo | f27bac2 | 2008-07-14 14:59:30 +0900 | [diff] [blame] | 3082 | } while (error == -EAGAIN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3083 | |
Dave Kleikamp | 21208ae | 2011-10-19 11:49:04 -0500 | [diff] [blame] | 3084 | if (error) { |
| 3085 | sdev_printk(KERN_WARNING, sdp, "sd_probe: memory exhausted.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3086 | goto out_put; |
Michael Reed | 1a03ae0 | 2010-09-20 11:20:22 -0500 | [diff] [blame] | 3087 | } |
| 3088 | |
Tejun Heo | 3e1a7ff | 2008-08-25 19:56:17 +0900 | [diff] [blame] | 3089 | 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] | 3090 | if (error) { |
| 3091 | sdev_printk(KERN_WARNING, sdp, "SCSI disk (sd) name length exceeded.\n"); |
Tejun Heo | f27bac2 | 2008-07-14 14:59:30 +0900 | [diff] [blame] | 3092 | goto out_free_index; |
Dave Kleikamp | 21208ae | 2011-10-19 11:49:04 -0500 | [diff] [blame] | 3093 | } |
Tejun Heo | f27bac2 | 2008-07-14 14:59:30 +0900 | [diff] [blame] | 3094 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3095 | sdkp->device = sdp; |
| 3096 | sdkp->driver = &sd_template; |
| 3097 | sdkp->disk = gd; |
| 3098 | sdkp->index = index; |
Arnd Bergmann | 409f349 | 2010-07-07 16:51:29 +0200 | [diff] [blame] | 3099 | atomic_set(&sdkp->openers, 0); |
Josh Hunt | 9e1a153 | 2012-06-09 07:03:39 -0700 | [diff] [blame] | 3100 | atomic_set(&sdkp->device->ioerr_cnt, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3101 | |
James Bottomley | 601e763 | 2009-05-26 20:35:48 +0000 | [diff] [blame] | 3102 | if (!sdp->request_queue->rq_timeout) { |
| 3103 | if (sdp->type != TYPE_MOD) |
| 3104 | blk_queue_rq_timeout(sdp->request_queue, SD_TIMEOUT); |
| 3105 | else |
| 3106 | blk_queue_rq_timeout(sdp->request_queue, |
| 3107 | SD_MOD_TIMEOUT); |
| 3108 | } |
| 3109 | |
| 3110 | device_initialize(&sdkp->dev); |
Alan Stern | 478a8a0 | 2010-06-16 14:52:17 -0400 | [diff] [blame] | 3111 | sdkp->dev.parent = dev; |
James Bottomley | 601e763 | 2009-05-26 20:35:48 +0000 | [diff] [blame] | 3112 | sdkp->dev.class = &sd_disk_class; |
Kees Cook | 02aa2a3 | 2013-07-03 15:04:56 -0700 | [diff] [blame] | 3113 | dev_set_name(&sdkp->dev, "%s", dev_name(dev)); |
James Bottomley | 601e763 | 2009-05-26 20:35:48 +0000 | [diff] [blame] | 3114 | |
Dan Carpenter | dee0586 | 2015-01-19 17:41:12 +0300 | [diff] [blame] | 3115 | error = device_add(&sdkp->dev); |
| 3116 | if (error) |
James Bottomley | 601e763 | 2009-05-26 20:35:48 +0000 | [diff] [blame] | 3117 | goto out_free_index; |
| 3118 | |
Alan Stern | 478a8a0 | 2010-06-16 14:52:17 -0400 | [diff] [blame] | 3119 | get_device(dev); |
| 3120 | dev_set_drvdata(dev, sdkp); |
James Bottomley | 601e763 | 2009-05-26 20:35:48 +0000 | [diff] [blame] | 3121 | |
James Bottomley | ea038f6 | 2009-08-21 09:47:54 -0600 | [diff] [blame] | 3122 | get_device(&sdkp->dev); /* prevent release before async_schedule */ |
Dan Williams | a7a20d1 | 2012-03-22 17:05:11 -0700 | [diff] [blame] | 3123 | async_schedule_domain(sd_probe_async, sdkp, &scsi_sd_probe_domain); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3124 | |
| 3125 | return 0; |
| 3126 | |
Tejun Heo | f27bac2 | 2008-07-14 14:59:30 +0900 | [diff] [blame] | 3127 | out_free_index: |
Tejun Heo | 4034cc6 | 2009-02-21 11:04:45 +0900 | [diff] [blame] | 3128 | spin_lock(&sd_index_lock); |
Tejun Heo | f27bac2 | 2008-07-14 14:59:30 +0900 | [diff] [blame] | 3129 | ida_remove(&sd_index_ida, index); |
Tejun Heo | 4034cc6 | 2009-02-21 11:04:45 +0900 | [diff] [blame] | 3130 | spin_unlock(&sd_index_lock); |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 3131 | out_put: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3132 | put_disk(gd); |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 3133 | out_free: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3134 | kfree(sdkp); |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 3135 | out: |
Subhash Jadavani | 6fe8c1d | 2014-09-10 14:54:09 +0300 | [diff] [blame] | 3136 | scsi_autopm_put_device(sdp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3137 | return error; |
| 3138 | } |
| 3139 | |
| 3140 | /** |
| 3141 | * sd_remove - called whenever a scsi disk (previously recognized by |
| 3142 | * sd_probe) is detached from the system. It is called (potentially |
| 3143 | * multiple times) during sd module unload. |
| 3144 | * @sdp: pointer to mid level scsi device object |
| 3145 | * |
| 3146 | * Note: this function is invoked from the scsi mid-level. |
| 3147 | * This function potentially frees up a device name (e.g. /dev/sdc) |
| 3148 | * that could be re-used by a subsequent sd_probe(). |
| 3149 | * This function is not called when the built-in sd driver is "exit-ed". |
| 3150 | **/ |
| 3151 | static int sd_remove(struct device *dev) |
| 3152 | { |
James Bottomley | 601e763 | 2009-05-26 20:35:48 +0000 | [diff] [blame] | 3153 | struct scsi_disk *sdkp; |
Hannes Reinecke | 0761df9 | 2013-05-10 11:06:16 +0200 | [diff] [blame] | 3154 | dev_t devt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3155 | |
James Bottomley | 601e763 | 2009-05-26 20:35:48 +0000 | [diff] [blame] | 3156 | sdkp = dev_get_drvdata(dev); |
Hannes Reinecke | 0761df9 | 2013-05-10 11:06:16 +0200 | [diff] [blame] | 3157 | devt = disk_devt(sdkp->disk); |
Alan Stern | 478a8a0 | 2010-06-16 14:52:17 -0400 | [diff] [blame] | 3158 | scsi_autopm_get_device(sdkp->device); |
| 3159 | |
Dan Williams | 3c31b52 | 2014-04-10 15:30:35 -0700 | [diff] [blame] | 3160 | async_synchronize_full_domain(&scsi_sd_pm_domain); |
Dan Williams | a7a20d1 | 2012-03-22 17:05:11 -0700 | [diff] [blame] | 3161 | async_synchronize_full_domain(&scsi_sd_probe_domain); |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 3162 | device_del(&sdkp->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3163 | del_gendisk(sdkp->disk); |
| 3164 | sd_shutdown(dev); |
Alan Stern | 39b7f1e | 2005-11-04 14:44:41 -0500 | [diff] [blame] | 3165 | |
Hannes Reinecke | 0761df9 | 2013-05-10 11:06:16 +0200 | [diff] [blame] | 3166 | blk_register_region(devt, SD_MINORS, NULL, |
| 3167 | sd_default_probe, NULL, NULL); |
| 3168 | |
Arjan van de Ven | 0b95067 | 2006-01-11 13:16:10 +0100 | [diff] [blame] | 3169 | mutex_lock(&sd_ref_mutex); |
Alan Stern | 39b7f1e | 2005-11-04 14:44:41 -0500 | [diff] [blame] | 3170 | dev_set_drvdata(dev, NULL); |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 3171 | put_device(&sdkp->dev); |
Arjan van de Ven | 0b95067 | 2006-01-11 13:16:10 +0100 | [diff] [blame] | 3172 | mutex_unlock(&sd_ref_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3173 | |
| 3174 | return 0; |
| 3175 | } |
| 3176 | |
| 3177 | /** |
| 3178 | * scsi_disk_release - Called to free the scsi_disk structure |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 3179 | * @dev: pointer to embedded class device |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3180 | * |
Arjan van de Ven | 0b95067 | 2006-01-11 13:16:10 +0100 | [diff] [blame] | 3181 | * sd_ref_mutex must be held entering this routine. Because it is |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3182 | * called on last put, you should always use the scsi_disk_get() |
| 3183 | * scsi_disk_put() helpers which manipulate the semaphore directly |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 3184 | * and never do a direct put_device. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3185 | **/ |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 3186 | static void scsi_disk_release(struct device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3187 | { |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 3188 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3189 | struct gendisk *disk = sdkp->disk; |
| 3190 | |
Tejun Heo | 4034cc6 | 2009-02-21 11:04:45 +0900 | [diff] [blame] | 3191 | spin_lock(&sd_index_lock); |
Tejun Heo | f27bac2 | 2008-07-14 14:59:30 +0900 | [diff] [blame] | 3192 | ida_remove(&sd_index_ida, sdkp->index); |
Tejun Heo | 4034cc6 | 2009-02-21 11:04:45 +0900 | [diff] [blame] | 3193 | spin_unlock(&sd_index_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3194 | |
| 3195 | disk->private_data = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3196 | put_disk(disk); |
Alan Stern | 39b7f1e | 2005-11-04 14:44:41 -0500 | [diff] [blame] | 3197 | put_device(&sdkp->device->sdev_gendev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3198 | |
| 3199 | kfree(sdkp); |
| 3200 | } |
| 3201 | |
James Bottomley | cc5d2c8 | 2007-03-20 12:26:03 -0500 | [diff] [blame] | 3202 | static int sd_start_stop_device(struct scsi_disk *sdkp, int start) |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 3203 | { |
| 3204 | unsigned char cmd[6] = { START_STOP }; /* START_VALID */ |
| 3205 | struct scsi_sense_hdr sshdr; |
James Bottomley | cc5d2c8 | 2007-03-20 12:26:03 -0500 | [diff] [blame] | 3206 | struct scsi_device *sdp = sdkp->device; |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 3207 | int res; |
| 3208 | |
| 3209 | if (start) |
| 3210 | cmd[4] |= 1; /* START */ |
| 3211 | |
Stefan Richter | d2886ea | 2008-05-11 00:34:07 +0200 | [diff] [blame] | 3212 | if (sdp->start_stop_pwr_cond) |
| 3213 | cmd[4] |= start ? 1 << 4 : 3 << 4; /* Active or Standby */ |
| 3214 | |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 3215 | if (!scsi_device_online(sdp)) |
| 3216 | return -ENODEV; |
| 3217 | |
Lin Ming | 9b21493 | 2013-03-23 11:42:25 +0800 | [diff] [blame] | 3218 | res = scsi_execute_req_flags(sdp, cmd, DMA_NONE, NULL, 0, &sshdr, |
| 3219 | SD_TIMEOUT, SD_MAX_RETRIES, NULL, REQ_PM); |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 3220 | if (res) { |
Hannes Reinecke | ef61329 | 2014-10-24 14:27:00 +0200 | [diff] [blame] | 3221 | sd_print_result(sdkp, "Start/Stop Unit failed", res); |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 3222 | if (driver_byte(res) & DRIVER_SENSE) |
James Bottomley | cc5d2c8 | 2007-03-20 12:26:03 -0500 | [diff] [blame] | 3223 | sd_print_sense_hdr(sdkp, &sshdr); |
Oliver Neukum | 9589791 | 2013-09-16 13:28:15 +0200 | [diff] [blame] | 3224 | if (scsi_sense_valid(&sshdr) && |
| 3225 | /* 0x3a is medium not present */ |
| 3226 | sshdr.asc == 0x3a) |
| 3227 | res = 0; |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 3228 | } |
| 3229 | |
Oliver Neukum | 9589791 | 2013-09-16 13:28:15 +0200 | [diff] [blame] | 3230 | /* SCSI error codes must not go to the generic layer */ |
| 3231 | if (res) |
| 3232 | return -EIO; |
| 3233 | |
| 3234 | return 0; |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 3235 | } |
| 3236 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3237 | /* |
| 3238 | * Send a SYNCHRONIZE CACHE instruction down to the device through |
| 3239 | * the normal SCSI command structure. Wait for the command to |
| 3240 | * complete. |
| 3241 | */ |
| 3242 | static void sd_shutdown(struct device *dev) |
| 3243 | { |
Christoph Hellwig | 3d9a1f5 | 2015-02-02 14:01:25 +0100 | [diff] [blame] | 3244 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3245 | |
| 3246 | if (!sdkp) |
| 3247 | return; /* this can happen */ |
| 3248 | |
Lin Ming | 54f57588 | 2011-12-05 09:20:26 +0800 | [diff] [blame] | 3249 | if (pm_runtime_suspended(dev)) |
Christoph Hellwig | 3d9a1f5 | 2015-02-02 14:01:25 +0100 | [diff] [blame] | 3250 | return; |
Lin Ming | 54f57588 | 2011-12-05 09:20:26 +0800 | [diff] [blame] | 3251 | |
Oliver Neukum | 9589791 | 2013-09-16 13:28:15 +0200 | [diff] [blame] | 3252 | if (sdkp->WCE && sdkp->media_present) { |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 3253 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
| 3254 | sd_sync_cache(sdkp); |
Alan Stern | 39b7f1e | 2005-11-04 14:44:41 -0500 | [diff] [blame] | 3255 | } |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 3256 | |
James Bottomley | cc5d2c8 | 2007-03-20 12:26:03 -0500 | [diff] [blame] | 3257 | if (system_state != SYSTEM_RESTART && sdkp->device->manage_start_stop) { |
| 3258 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); |
| 3259 | sd_start_stop_device(sdkp, 0); |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 3260 | } |
Alan Stern | 39b7f1e | 2005-11-04 14:44:41 -0500 | [diff] [blame] | 3261 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3262 | |
Oliver Neukum | 9589791 | 2013-09-16 13:28:15 +0200 | [diff] [blame] | 3263 | static int sd_suspend_common(struct device *dev, bool ignore_stop_errors) |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 3264 | { |
Christoph Hellwig | 3d9a1f5 | 2015-02-02 14:01:25 +0100 | [diff] [blame] | 3265 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
Alan Stern | 09ff92f | 2007-05-21 09:55:04 -0400 | [diff] [blame] | 3266 | int ret = 0; |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 3267 | |
| 3268 | if (!sdkp) |
| 3269 | return 0; /* this can happen */ |
| 3270 | |
Oliver Neukum | 9589791 | 2013-09-16 13:28:15 +0200 | [diff] [blame] | 3271 | if (sdkp->WCE && sdkp->media_present) { |
James Bottomley | cc5d2c8 | 2007-03-20 12:26:03 -0500 | [diff] [blame] | 3272 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 3273 | ret = sd_sync_cache(sdkp); |
Oliver Neukum | 9589791 | 2013-09-16 13:28:15 +0200 | [diff] [blame] | 3274 | if (ret) { |
| 3275 | /* ignore OFFLINE device */ |
| 3276 | if (ret == -ENODEV) |
| 3277 | ret = 0; |
Alan Stern | 09ff92f | 2007-05-21 09:55:04 -0400 | [diff] [blame] | 3278 | goto done; |
Oliver Neukum | 9589791 | 2013-09-16 13:28:15 +0200 | [diff] [blame] | 3279 | } |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 3280 | } |
| 3281 | |
Aaron Lu | 691e3d3 | 2012-11-09 15:27:55 +0800 | [diff] [blame] | 3282 | if (sdkp->device->manage_start_stop) { |
James Bottomley | cc5d2c8 | 2007-03-20 12:26:03 -0500 | [diff] [blame] | 3283 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); |
Oliver Neukum | 9589791 | 2013-09-16 13:28:15 +0200 | [diff] [blame] | 3284 | /* an error is not worth aborting a system sleep */ |
James Bottomley | cc5d2c8 | 2007-03-20 12:26:03 -0500 | [diff] [blame] | 3285 | ret = sd_start_stop_device(sdkp, 0); |
Oliver Neukum | 9589791 | 2013-09-16 13:28:15 +0200 | [diff] [blame] | 3286 | if (ignore_stop_errors) |
| 3287 | ret = 0; |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 3288 | } |
| 3289 | |
Alan Stern | 09ff92f | 2007-05-21 09:55:04 -0400 | [diff] [blame] | 3290 | done: |
Alan Stern | 09ff92f | 2007-05-21 09:55:04 -0400 | [diff] [blame] | 3291 | return ret; |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 3292 | } |
| 3293 | |
Oliver Neukum | 9589791 | 2013-09-16 13:28:15 +0200 | [diff] [blame] | 3294 | static int sd_suspend_system(struct device *dev) |
| 3295 | { |
| 3296 | return sd_suspend_common(dev, true); |
| 3297 | } |
| 3298 | |
| 3299 | static int sd_suspend_runtime(struct device *dev) |
| 3300 | { |
| 3301 | return sd_suspend_common(dev, false); |
| 3302 | } |
| 3303 | |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 3304 | static int sd_resume(struct device *dev) |
| 3305 | { |
Christoph Hellwig | 3d9a1f5 | 2015-02-02 14:01:25 +0100 | [diff] [blame] | 3306 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 3307 | |
James Bottomley | cc5d2c8 | 2007-03-20 12:26:03 -0500 | [diff] [blame] | 3308 | if (!sdkp->device->manage_start_stop) |
Christoph Hellwig | 3d9a1f5 | 2015-02-02 14:01:25 +0100 | [diff] [blame] | 3309 | return 0; |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 3310 | |
James Bottomley | cc5d2c8 | 2007-03-20 12:26:03 -0500 | [diff] [blame] | 3311 | sd_printk(KERN_NOTICE, sdkp, "Starting disk\n"); |
Christoph Hellwig | 3d9a1f5 | 2015-02-02 14:01:25 +0100 | [diff] [blame] | 3312 | return sd_start_stop_device(sdkp, 1); |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 3313 | } |
| 3314 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3315 | /** |
| 3316 | * init_sd - entry point for this driver (both when built in or when |
| 3317 | * a module). |
| 3318 | * |
| 3319 | * Note: this function registers this driver with the scsi mid-level. |
| 3320 | **/ |
| 3321 | static int __init init_sd(void) |
| 3322 | { |
Jeff Garzik | 5e4009b | 2006-10-04 05:32:54 -0400 | [diff] [blame] | 3323 | int majors = 0, i, err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3324 | |
| 3325 | SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n")); |
| 3326 | |
Hannes Reinecke | 0761df9 | 2013-05-10 11:06:16 +0200 | [diff] [blame] | 3327 | for (i = 0; i < SD_MAJORS; i++) { |
| 3328 | if (register_blkdev(sd_major(i), "sd") != 0) |
| 3329 | continue; |
| 3330 | majors++; |
| 3331 | blk_register_region(sd_major(i), SD_MINORS, NULL, |
| 3332 | sd_default_probe, NULL, NULL); |
| 3333 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3334 | |
| 3335 | if (!majors) |
| 3336 | return -ENODEV; |
| 3337 | |
Jeff Garzik | 5e4009b | 2006-10-04 05:32:54 -0400 | [diff] [blame] | 3338 | err = class_register(&sd_disk_class); |
| 3339 | if (err) |
| 3340 | goto err_out; |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 3341 | |
Martin K. Petersen | 4e7392e | 2009-09-20 16:49:38 -0400 | [diff] [blame] | 3342 | sd_cdb_cache = kmem_cache_create("sd_ext_cdb", SD_EXT_CDB_SIZE, |
| 3343 | 0, 0, NULL); |
| 3344 | if (!sd_cdb_cache) { |
| 3345 | printk(KERN_ERR "sd: can't init extended cdb cache\n"); |
Clément Calmels | 8d96447 | 2014-06-03 23:34:25 +0200 | [diff] [blame] | 3346 | err = -ENOMEM; |
Martin K. Petersen | 4e7392e | 2009-09-20 16:49:38 -0400 | [diff] [blame] | 3347 | goto err_out_class; |
| 3348 | } |
| 3349 | |
| 3350 | sd_cdb_pool = mempool_create_slab_pool(SD_MEMPOOL_SIZE, sd_cdb_cache); |
| 3351 | if (!sd_cdb_pool) { |
| 3352 | printk(KERN_ERR "sd: can't init extended cdb pool\n"); |
Clément Calmels | 8d96447 | 2014-06-03 23:34:25 +0200 | [diff] [blame] | 3353 | err = -ENOMEM; |
Martin K. Petersen | 4e7392e | 2009-09-20 16:49:38 -0400 | [diff] [blame] | 3354 | goto err_out_cache; |
| 3355 | } |
| 3356 | |
Joel D. Diaz | afd5e34 | 2012-10-10 10:36:11 +0200 | [diff] [blame] | 3357 | err = scsi_register_driver(&sd_template.gendrv); |
| 3358 | if (err) |
| 3359 | goto err_out_driver; |
| 3360 | |
Jeff Garzik | 5e4009b | 2006-10-04 05:32:54 -0400 | [diff] [blame] | 3361 | return 0; |
| 3362 | |
Joel D. Diaz | afd5e34 | 2012-10-10 10:36:11 +0200 | [diff] [blame] | 3363 | err_out_driver: |
| 3364 | mempool_destroy(sd_cdb_pool); |
| 3365 | |
Martin K. Petersen | 4e7392e | 2009-09-20 16:49:38 -0400 | [diff] [blame] | 3366 | err_out_cache: |
| 3367 | kmem_cache_destroy(sd_cdb_cache); |
| 3368 | |
Jeff Garzik | 5e4009b | 2006-10-04 05:32:54 -0400 | [diff] [blame] | 3369 | err_out_class: |
| 3370 | class_unregister(&sd_disk_class); |
| 3371 | err_out: |
| 3372 | for (i = 0; i < SD_MAJORS; i++) |
| 3373 | unregister_blkdev(sd_major(i), "sd"); |
| 3374 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3375 | } |
| 3376 | |
| 3377 | /** |
| 3378 | * exit_sd - exit point for this driver (when it is a module). |
| 3379 | * |
| 3380 | * Note: this function unregisters this driver from the scsi mid-level. |
| 3381 | **/ |
| 3382 | static void __exit exit_sd(void) |
| 3383 | { |
| 3384 | int i; |
| 3385 | |
| 3386 | SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n")); |
| 3387 | |
Joel D. Diaz | afd5e34 | 2012-10-10 10:36:11 +0200 | [diff] [blame] | 3388 | scsi_unregister_driver(&sd_template.gendrv); |
Martin K. Petersen | 4e7392e | 2009-09-20 16:49:38 -0400 | [diff] [blame] | 3389 | mempool_destroy(sd_cdb_pool); |
| 3390 | kmem_cache_destroy(sd_cdb_cache); |
| 3391 | |
Jeff Garzik | 5e4009b | 2006-10-04 05:32:54 -0400 | [diff] [blame] | 3392 | class_unregister(&sd_disk_class); |
| 3393 | |
Hannes Reinecke | 0761df9 | 2013-05-10 11:06:16 +0200 | [diff] [blame] | 3394 | for (i = 0; i < SD_MAJORS; i++) { |
| 3395 | blk_unregister_region(sd_major(i), SD_MINORS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3396 | unregister_blkdev(sd_major(i), "sd"); |
Hannes Reinecke | 0761df9 | 2013-05-10 11:06:16 +0200 | [diff] [blame] | 3397 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3398 | } |
| 3399 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3400 | module_init(init_sd); |
| 3401 | module_exit(exit_sd); |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 3402 | |
| 3403 | static void sd_print_sense_hdr(struct scsi_disk *sdkp, |
| 3404 | struct scsi_sense_hdr *sshdr) |
| 3405 | { |
Hannes Reinecke | 2104551 | 2015-01-08 07:43:46 +0100 | [diff] [blame] | 3406 | scsi_print_sense_hdr(sdkp->device, |
| 3407 | sdkp->disk ? sdkp->disk->disk_name : NULL, sshdr); |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 3408 | } |
| 3409 | |
Hannes Reinecke | ef61329 | 2014-10-24 14:27:00 +0200 | [diff] [blame] | 3410 | static void sd_print_result(const struct scsi_disk *sdkp, const char *msg, |
| 3411 | int result) |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 3412 | { |
Hannes Reinecke | ef61329 | 2014-10-24 14:27:00 +0200 | [diff] [blame] | 3413 | const char *hb_string = scsi_hostbyte_string(result); |
| 3414 | const char *db_string = scsi_driverbyte_string(result); |
| 3415 | |
| 3416 | if (hb_string || db_string) |
| 3417 | sd_printk(KERN_INFO, sdkp, |
| 3418 | "%s: Result: hostbyte=%s driverbyte=%s\n", msg, |
| 3419 | hb_string ? hb_string : "invalid", |
| 3420 | db_string ? db_string : "invalid"); |
| 3421 | else |
| 3422 | sd_printk(KERN_INFO, sdkp, |
| 3423 | "%s: Result: hostbyte=0x%02x driverbyte=0x%02x\n", |
| 3424 | msg, host_byte(result), driver_byte(result)); |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 3425 | } |
| 3426 | |