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> |
Christoph Hellwig | 8475c81 | 2016-09-11 19:35:41 +0200 | [diff] [blame] | 55 | #include <linux/t10-pi.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | #include <asm/uaccess.h> |
Dave Hansen | 8f76d15 | 2009-04-21 16:43:27 -0700 | [diff] [blame] | 57 | #include <asm/unaligned.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | |
| 59 | #include <scsi/scsi.h> |
| 60 | #include <scsi/scsi_cmnd.h> |
| 61 | #include <scsi/scsi_dbg.h> |
| 62 | #include <scsi/scsi_device.h> |
| 63 | #include <scsi/scsi_driver.h> |
| 64 | #include <scsi/scsi_eh.h> |
| 65 | #include <scsi/scsi_host.h> |
| 66 | #include <scsi/scsi_ioctl.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | #include <scsi/scsicam.h> |
| 68 | |
Martin K. Petersen | aa91696 | 2008-06-17 12:47:32 -0400 | [diff] [blame] | 69 | #include "sd.h" |
Dan Williams | a7a20d1 | 2012-03-22 17:05:11 -0700 | [diff] [blame] | 70 | #include "scsi_priv.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | #include "scsi_logging.h" |
| 72 | |
Rene Herman | f018fa5 | 2006-03-08 00:14:20 -0800 | [diff] [blame] | 73 | MODULE_AUTHOR("Eric Youngdale"); |
| 74 | MODULE_DESCRIPTION("SCSI disk (sd) driver"); |
| 75 | MODULE_LICENSE("GPL"); |
| 76 | |
| 77 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK0_MAJOR); |
| 78 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK1_MAJOR); |
| 79 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK2_MAJOR); |
| 80 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK3_MAJOR); |
| 81 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK4_MAJOR); |
| 82 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK5_MAJOR); |
| 83 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK6_MAJOR); |
| 84 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK7_MAJOR); |
| 85 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK8_MAJOR); |
| 86 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK9_MAJOR); |
| 87 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK10_MAJOR); |
| 88 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK11_MAJOR); |
| 89 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK12_MAJOR); |
| 90 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK13_MAJOR); |
| 91 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK14_MAJOR); |
| 92 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK15_MAJOR); |
Michael Tokarev | d7b8bcb | 2006-10-27 16:02:37 +0400 | [diff] [blame] | 93 | MODULE_ALIAS_SCSI_DEVICE(TYPE_DISK); |
| 94 | MODULE_ALIAS_SCSI_DEVICE(TYPE_MOD); |
| 95 | MODULE_ALIAS_SCSI_DEVICE(TYPE_RBC); |
Rene Herman | f018fa5 | 2006-03-08 00:14:20 -0800 | [diff] [blame] | 96 | |
Tejun Heo | 870d665 | 2008-08-25 19:47:25 +0900 | [diff] [blame] | 97 | #if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT) |
Tejun Heo | f615b48 | 2008-08-25 19:47:24 +0900 | [diff] [blame] | 98 | #define SD_MINORS 16 |
Tejun Heo | 870d665 | 2008-08-25 19:47:25 +0900 | [diff] [blame] | 99 | #else |
Tejun Heo | 3e1a7ff | 2008-08-25 19:56:17 +0900 | [diff] [blame] | 100 | #define SD_MINORS 0 |
Tejun Heo | 870d665 | 2008-08-25 19:47:25 +0900 | [diff] [blame] | 101 | #endif |
| 102 | |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 103 | static void sd_config_discard(struct scsi_disk *, unsigned int); |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 104 | static void sd_config_write_same(struct scsi_disk *); |
Linus Torvalds | 7b3d954 | 2008-01-06 10:17:12 -0800 | [diff] [blame] | 105 | static int sd_revalidate_disk(struct gendisk *); |
Tejun Heo | 72ec24b | 2010-05-15 20:09:32 +0200 | [diff] [blame] | 106 | static void sd_unlock_native_capacity(struct gendisk *disk); |
Linus Torvalds | 7b3d954 | 2008-01-06 10:17:12 -0800 | [diff] [blame] | 107 | static int sd_probe(struct device *); |
| 108 | static int sd_remove(struct device *); |
| 109 | static void sd_shutdown(struct device *); |
Oliver Neukum | 9589791 | 2013-09-16 13:28:15 +0200 | [diff] [blame] | 110 | static int sd_suspend_system(struct device *); |
| 111 | static int sd_suspend_runtime(struct device *); |
Linus Torvalds | 7b3d954 | 2008-01-06 10:17:12 -0800 | [diff] [blame] | 112 | static int sd_resume(struct device *); |
| 113 | static void sd_rescan(struct device *); |
Christoph Hellwig | a1b73fc | 2014-05-01 16:51:04 +0200 | [diff] [blame] | 114 | static int sd_init_command(struct scsi_cmnd *SCpnt); |
| 115 | static void sd_uninit_command(struct scsi_cmnd *SCpnt); |
Linus Torvalds | 7b3d954 | 2008-01-06 10:17:12 -0800 | [diff] [blame] | 116 | static int sd_done(struct scsi_cmnd *); |
James Bottomley | 2451079 | 2013-11-11 13:44:53 +0100 | [diff] [blame] | 117 | static int sd_eh_action(struct scsi_cmnd *, int); |
Linus Torvalds | 7b3d954 | 2008-01-06 10:17:12 -0800 | [diff] [blame] | 118 | static void sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer); |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 119 | static void scsi_disk_release(struct device *cdev); |
Linus Torvalds | 7b3d954 | 2008-01-06 10:17:12 -0800 | [diff] [blame] | 120 | 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] | 121 | static void sd_print_result(const struct scsi_disk *, const char *, int); |
Linus Torvalds | 7b3d954 | 2008-01-06 10:17:12 -0800 | [diff] [blame] | 122 | |
Tejun Heo | 4034cc6 | 2009-02-21 11:04:45 +0900 | [diff] [blame] | 123 | static DEFINE_SPINLOCK(sd_index_lock); |
Tejun Heo | f27bac2 | 2008-07-14 14:59:30 +0900 | [diff] [blame] | 124 | static DEFINE_IDA(sd_index_ida); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | |
| 126 | /* This semaphore is used to mediate the 0->1 reference get in the |
| 127 | * face of object destruction (i.e. we can't allow a get on an |
| 128 | * object after last put) */ |
Arjan van de Ven | 0b95067 | 2006-01-11 13:16:10 +0100 | [diff] [blame] | 129 | static DEFINE_MUTEX(sd_ref_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | |
H Hartley Sweeten | 439d77f | 2010-08-10 18:01:20 -0700 | [diff] [blame] | 131 | static struct kmem_cache *sd_cdb_cache; |
| 132 | static mempool_t *sd_cdb_pool; |
Martin K. Petersen | 4e7392e | 2009-09-20 16:49:38 -0400 | [diff] [blame] | 133 | |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 134 | static const char *sd_cache_types[] = { |
| 135 | "write through", "none", "write back", |
| 136 | "write back, no read (daft)" |
| 137 | }; |
| 138 | |
Vaughan Cao | cb2fb68 | 2014-06-03 17:37:30 +0800 | [diff] [blame] | 139 | static void sd_set_flush_flag(struct scsi_disk *sdkp) |
| 140 | { |
Jens Axboe | eb310e2 | 2016-03-30 10:06:11 -0600 | [diff] [blame] | 141 | bool wc = false, fua = false; |
Vaughan Cao | cb2fb68 | 2014-06-03 17:37:30 +0800 | [diff] [blame] | 142 | |
| 143 | if (sdkp->WCE) { |
Jens Axboe | eb310e2 | 2016-03-30 10:06:11 -0600 | [diff] [blame] | 144 | wc = true; |
Vaughan Cao | cb2fb68 | 2014-06-03 17:37:30 +0800 | [diff] [blame] | 145 | if (sdkp->DPOFUA) |
Jens Axboe | eb310e2 | 2016-03-30 10:06:11 -0600 | [diff] [blame] | 146 | fua = true; |
Vaughan Cao | cb2fb68 | 2014-06-03 17:37:30 +0800 | [diff] [blame] | 147 | } |
| 148 | |
Jens Axboe | eb310e2 | 2016-03-30 10:06:11 -0600 | [diff] [blame] | 149 | blk_queue_write_cache(sdkp->disk->queue, wc, fua); |
Vaughan Cao | cb2fb68 | 2014-06-03 17:37:30 +0800 | [diff] [blame] | 150 | } |
| 151 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 152 | static ssize_t |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 153 | cache_type_store(struct device *dev, struct device_attribute *attr, |
| 154 | const char *buf, size_t count) |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 155 | { |
| 156 | int i, ct = -1, rcd, wce, sp; |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 157 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 158 | struct scsi_device *sdp = sdkp->device; |
| 159 | char buffer[64]; |
| 160 | char *buffer_data; |
| 161 | struct scsi_mode_data data; |
| 162 | struct scsi_sense_hdr sshdr; |
Ben Hutchings | 2ee3e26 | 2013-05-27 19:07:19 +0100 | [diff] [blame] | 163 | static const char temp[] = "temporary "; |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 164 | int len; |
| 165 | |
| 166 | if (sdp->type != TYPE_DISK) |
| 167 | /* no cache control on RBC devices; theoretically they |
| 168 | * can do it, but there's probably so many exceptions |
| 169 | * it's not worth the risk */ |
| 170 | return -EINVAL; |
| 171 | |
James Bottomley | 39c60a0 | 2013-04-24 14:02:53 -0700 | [diff] [blame] | 172 | if (strncmp(buf, temp, sizeof(temp) - 1) == 0) { |
| 173 | buf += sizeof(temp) - 1; |
| 174 | sdkp->cache_override = 1; |
| 175 | } else { |
| 176 | sdkp->cache_override = 0; |
| 177 | } |
| 178 | |
Tobias Klauser | 6391a11 | 2006-06-08 22:23:48 -0700 | [diff] [blame] | 179 | for (i = 0; i < ARRAY_SIZE(sd_cache_types); i++) { |
H Hartley Sweeten | 439d77f | 2010-08-10 18:01:20 -0700 | [diff] [blame] | 180 | len = strlen(sd_cache_types[i]); |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 181 | if (strncmp(sd_cache_types[i], buf, len) == 0 && |
| 182 | buf[len] == '\n') { |
| 183 | ct = i; |
| 184 | break; |
| 185 | } |
| 186 | } |
| 187 | if (ct < 0) |
| 188 | return -EINVAL; |
| 189 | rcd = ct & 0x01 ? 1 : 0; |
Sujit Reddy Thumma | 2eefd57 | 2014-08-11 15:40:37 +0300 | [diff] [blame] | 190 | wce = (ct & 0x02) && !sdkp->write_prot ? 1 : 0; |
James Bottomley | 39c60a0 | 2013-04-24 14:02:53 -0700 | [diff] [blame] | 191 | |
| 192 | if (sdkp->cache_override) { |
| 193 | sdkp->WCE = wce; |
| 194 | sdkp->RCD = rcd; |
Vaughan Cao | cb2fb68 | 2014-06-03 17:37:30 +0800 | [diff] [blame] | 195 | sd_set_flush_flag(sdkp); |
James Bottomley | 39c60a0 | 2013-04-24 14:02:53 -0700 | [diff] [blame] | 196 | return count; |
| 197 | } |
| 198 | |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 199 | if (scsi_mode_sense(sdp, 0x08, 8, buffer, sizeof(buffer), SD_TIMEOUT, |
| 200 | SD_MAX_RETRIES, &data, NULL)) |
| 201 | return -EINVAL; |
Andrew Morton | a9312fb | 2006-03-25 03:08:30 -0800 | [diff] [blame] | 202 | len = min_t(size_t, sizeof(buffer), data.length - data.header_length - |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 203 | data.block_descriptor_length); |
| 204 | buffer_data = buffer + data.header_length + |
| 205 | data.block_descriptor_length; |
| 206 | buffer_data[2] &= ~0x05; |
| 207 | buffer_data[2] |= wce << 2 | rcd; |
| 208 | sp = buffer_data[0] & 0x80 ? 1 : 0; |
Gabriel Krisman Bertazi | 2c5d16d | 2015-10-30 16:04:43 -0200 | [diff] [blame] | 209 | buffer_data[0] &= ~0x80; |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 210 | |
| 211 | if (scsi_mode_select(sdp, 1, sp, 8, buffer_data, len, SD_TIMEOUT, |
| 212 | SD_MAX_RETRIES, &data, &sshdr)) { |
| 213 | if (scsi_sense_valid(&sshdr)) |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 214 | sd_print_sense_hdr(sdkp, &sshdr); |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 215 | return -EINVAL; |
| 216 | } |
Andrew Patterson | f98a8ca | 2008-09-04 14:27:35 -0600 | [diff] [blame] | 217 | revalidate_disk(sdkp->disk); |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 218 | return count; |
| 219 | } |
| 220 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 221 | static ssize_t |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 222 | manage_start_stop_show(struct device *dev, struct device_attribute *attr, |
| 223 | char *buf) |
| 224 | { |
| 225 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
| 226 | struct scsi_device *sdp = sdkp->device; |
| 227 | |
| 228 | return snprintf(buf, 20, "%u\n", sdp->manage_start_stop); |
| 229 | } |
| 230 | |
| 231 | static ssize_t |
| 232 | manage_start_stop_store(struct device *dev, struct device_attribute *attr, |
| 233 | const char *buf, size_t count) |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 234 | { |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 235 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 236 | struct scsi_device *sdp = sdkp->device; |
| 237 | |
| 238 | if (!capable(CAP_SYS_ADMIN)) |
| 239 | return -EACCES; |
| 240 | |
| 241 | sdp->manage_start_stop = simple_strtoul(buf, NULL, 10); |
| 242 | |
| 243 | return count; |
| 244 | } |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 245 | static DEVICE_ATTR_RW(manage_start_stop); |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 246 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 247 | static ssize_t |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 248 | allow_restart_show(struct device *dev, struct device_attribute *attr, char *buf) |
| 249 | { |
| 250 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
| 251 | |
| 252 | return snprintf(buf, 40, "%d\n", sdkp->device->allow_restart); |
| 253 | } |
| 254 | |
| 255 | static ssize_t |
| 256 | allow_restart_store(struct device *dev, struct device_attribute *attr, |
| 257 | const char *buf, size_t count) |
Brian King | a144c5a | 2006-06-27 11:10:31 -0500 | [diff] [blame] | 258 | { |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 259 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
Brian King | a144c5a | 2006-06-27 11:10:31 -0500 | [diff] [blame] | 260 | struct scsi_device *sdp = sdkp->device; |
| 261 | |
| 262 | if (!capable(CAP_SYS_ADMIN)) |
| 263 | return -EACCES; |
| 264 | |
| 265 | if (sdp->type != TYPE_DISK) |
| 266 | return -EINVAL; |
| 267 | |
| 268 | sdp->allow_restart = simple_strtoul(buf, NULL, 10); |
| 269 | |
| 270 | return count; |
| 271 | } |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 272 | static DEVICE_ATTR_RW(allow_restart); |
Brian King | a144c5a | 2006-06-27 11:10:31 -0500 | [diff] [blame] | 273 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 274 | static ssize_t |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 275 | cache_type_show(struct device *dev, struct device_attribute *attr, char *buf) |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 276 | { |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 277 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 278 | int ct = sdkp->RCD + 2*sdkp->WCE; |
| 279 | |
| 280 | return snprintf(buf, 40, "%s\n", sd_cache_types[ct]); |
| 281 | } |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 282 | static DEVICE_ATTR_RW(cache_type); |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 283 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 284 | static ssize_t |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 285 | FUA_show(struct device *dev, struct device_attribute *attr, char *buf) |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 286 | { |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 287 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 288 | |
| 289 | return snprintf(buf, 20, "%u\n", sdkp->DPOFUA); |
| 290 | } |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 291 | static DEVICE_ATTR_RO(FUA); |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 292 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 293 | static ssize_t |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 294 | protection_type_show(struct device *dev, struct device_attribute *attr, |
| 295 | char *buf) |
Martin K. Petersen | e0597d7 | 2008-07-17 04:28:34 -0400 | [diff] [blame] | 296 | { |
| 297 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
| 298 | |
| 299 | return snprintf(buf, 20, "%u\n", sdkp->protection_type); |
| 300 | } |
| 301 | |
| 302 | static ssize_t |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 303 | protection_type_store(struct device *dev, struct device_attribute *attr, |
| 304 | const char *buf, size_t count) |
Martin K. Petersen | 8172499 | 2012-08-28 14:29:34 -0400 | [diff] [blame] | 305 | { |
| 306 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
| 307 | unsigned int val; |
| 308 | int err; |
| 309 | |
| 310 | if (!capable(CAP_SYS_ADMIN)) |
| 311 | return -EACCES; |
| 312 | |
| 313 | err = kstrtouint(buf, 10, &val); |
| 314 | |
| 315 | if (err) |
| 316 | return err; |
| 317 | |
Christoph Hellwig | 8475c81 | 2016-09-11 19:35:41 +0200 | [diff] [blame] | 318 | if (val >= 0 && val <= T10_PI_TYPE3_PROTECTION) |
Martin K. Petersen | 8172499 | 2012-08-28 14:29:34 -0400 | [diff] [blame] | 319 | sdkp->protection_type = val; |
| 320 | |
| 321 | return count; |
| 322 | } |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 323 | static DEVICE_ATTR_RW(protection_type); |
Martin K. Petersen | 8172499 | 2012-08-28 14:29:34 -0400 | [diff] [blame] | 324 | |
| 325 | static ssize_t |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 326 | protection_mode_show(struct device *dev, struct device_attribute *attr, |
| 327 | char *buf) |
Martin K. Petersen | 518fa8e | 2010-10-08 01:36:24 -0400 | [diff] [blame] | 328 | { |
| 329 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
| 330 | struct scsi_device *sdp = sdkp->device; |
| 331 | unsigned int dif, dix; |
| 332 | |
| 333 | dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type); |
| 334 | dix = scsi_host_dix_capable(sdp->host, sdkp->protection_type); |
| 335 | |
Christoph Hellwig | 8475c81 | 2016-09-11 19:35:41 +0200 | [diff] [blame] | 336 | if (!dix && scsi_host_dix_capable(sdp->host, T10_PI_TYPE0_PROTECTION)) { |
Martin K. Petersen | 518fa8e | 2010-10-08 01:36:24 -0400 | [diff] [blame] | 337 | dif = 0; |
| 338 | dix = 1; |
| 339 | } |
| 340 | |
| 341 | if (!dif && !dix) |
| 342 | return snprintf(buf, 20, "none\n"); |
| 343 | |
| 344 | return snprintf(buf, 20, "%s%u\n", dix ? "dix" : "dif", dif); |
| 345 | } |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 346 | static DEVICE_ATTR_RO(protection_mode); |
Martin K. Petersen | 518fa8e | 2010-10-08 01:36:24 -0400 | [diff] [blame] | 347 | |
| 348 | static ssize_t |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 349 | 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] | 350 | { |
| 351 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
| 352 | |
| 353 | return snprintf(buf, 20, "%u\n", sdkp->ATO); |
| 354 | } |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 355 | static DEVICE_ATTR_RO(app_tag_own); |
Martin K. Petersen | e0597d7 | 2008-07-17 04:28:34 -0400 | [diff] [blame] | 356 | |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 357 | static ssize_t |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 358 | thin_provisioning_show(struct device *dev, struct device_attribute *attr, |
| 359 | char *buf) |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 360 | { |
| 361 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
| 362 | |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 363 | return snprintf(buf, 20, "%u\n", sdkp->lbpme); |
| 364 | } |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 365 | static DEVICE_ATTR_RO(thin_provisioning); |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 366 | |
| 367 | static const char *lbp_mode[] = { |
| 368 | [SD_LBP_FULL] = "full", |
| 369 | [SD_LBP_UNMAP] = "unmap", |
| 370 | [SD_LBP_WS16] = "writesame_16", |
| 371 | [SD_LBP_WS10] = "writesame_10", |
| 372 | [SD_LBP_ZERO] = "writesame_zero", |
| 373 | [SD_LBP_DISABLE] = "disabled", |
| 374 | }; |
| 375 | |
| 376 | static ssize_t |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 377 | provisioning_mode_show(struct device *dev, struct device_attribute *attr, |
| 378 | char *buf) |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 379 | { |
| 380 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
| 381 | |
| 382 | return snprintf(buf, 20, "%s\n", lbp_mode[sdkp->provisioning_mode]); |
| 383 | } |
| 384 | |
| 385 | static ssize_t |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 386 | provisioning_mode_store(struct device *dev, struct device_attribute *attr, |
| 387 | const char *buf, size_t count) |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 388 | { |
| 389 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
| 390 | struct scsi_device *sdp = sdkp->device; |
| 391 | |
| 392 | if (!capable(CAP_SYS_ADMIN)) |
| 393 | return -EACCES; |
| 394 | |
| 395 | if (sdp->type != TYPE_DISK) |
| 396 | return -EINVAL; |
| 397 | |
| 398 | if (!strncmp(buf, lbp_mode[SD_LBP_UNMAP], 20)) |
| 399 | sd_config_discard(sdkp, SD_LBP_UNMAP); |
| 400 | else if (!strncmp(buf, lbp_mode[SD_LBP_WS16], 20)) |
| 401 | sd_config_discard(sdkp, SD_LBP_WS16); |
| 402 | else if (!strncmp(buf, lbp_mode[SD_LBP_WS10], 20)) |
| 403 | sd_config_discard(sdkp, SD_LBP_WS10); |
| 404 | else if (!strncmp(buf, lbp_mode[SD_LBP_ZERO], 20)) |
| 405 | sd_config_discard(sdkp, SD_LBP_ZERO); |
| 406 | else if (!strncmp(buf, lbp_mode[SD_LBP_DISABLE], 20)) |
| 407 | sd_config_discard(sdkp, SD_LBP_DISABLE); |
| 408 | else |
| 409 | return -EINVAL; |
| 410 | |
| 411 | return count; |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 412 | } |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 413 | static DEVICE_ATTR_RW(provisioning_mode); |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 414 | |
Martin K. Petersen | 18a4d0a | 2012-02-09 13:48:53 -0500 | [diff] [blame] | 415 | static ssize_t |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 416 | max_medium_access_timeouts_show(struct device *dev, |
| 417 | struct device_attribute *attr, char *buf) |
Martin K. Petersen | 18a4d0a | 2012-02-09 13:48:53 -0500 | [diff] [blame] | 418 | { |
| 419 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
| 420 | |
| 421 | return snprintf(buf, 20, "%u\n", sdkp->max_medium_access_timeouts); |
| 422 | } |
| 423 | |
| 424 | static ssize_t |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 425 | max_medium_access_timeouts_store(struct device *dev, |
| 426 | struct device_attribute *attr, const char *buf, |
| 427 | size_t count) |
Martin K. Petersen | 18a4d0a | 2012-02-09 13:48:53 -0500 | [diff] [blame] | 428 | { |
| 429 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
| 430 | int err; |
| 431 | |
| 432 | if (!capable(CAP_SYS_ADMIN)) |
| 433 | return -EACCES; |
| 434 | |
| 435 | err = kstrtouint(buf, 10, &sdkp->max_medium_access_timeouts); |
| 436 | |
| 437 | return err ? err : count; |
| 438 | } |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 439 | static DEVICE_ATTR_RW(max_medium_access_timeouts); |
Martin K. Petersen | 18a4d0a | 2012-02-09 13:48:53 -0500 | [diff] [blame] | 440 | |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 441 | static ssize_t |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 442 | max_write_same_blocks_show(struct device *dev, struct device_attribute *attr, |
| 443 | char *buf) |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 444 | { |
| 445 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
| 446 | |
| 447 | return snprintf(buf, 20, "%u\n", sdkp->max_ws_blocks); |
| 448 | } |
| 449 | |
| 450 | static ssize_t |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 451 | max_write_same_blocks_store(struct device *dev, struct device_attribute *attr, |
| 452 | const char *buf, size_t count) |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 453 | { |
| 454 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
| 455 | struct scsi_device *sdp = sdkp->device; |
| 456 | unsigned long max; |
| 457 | int err; |
| 458 | |
| 459 | if (!capable(CAP_SYS_ADMIN)) |
| 460 | return -EACCES; |
| 461 | |
| 462 | if (sdp->type != TYPE_DISK) |
| 463 | return -EINVAL; |
| 464 | |
| 465 | err = kstrtoul(buf, 10, &max); |
| 466 | |
| 467 | if (err) |
| 468 | return err; |
| 469 | |
| 470 | if (max == 0) |
| 471 | sdp->no_write_same = 1; |
Martin K. Petersen | 66c28f9 | 2013-06-06 22:15:55 -0400 | [diff] [blame] | 472 | else if (max <= SD_MAX_WS16_BLOCKS) { |
| 473 | sdp->no_write_same = 0; |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 474 | sdkp->max_ws_blocks = max; |
Martin K. Petersen | 66c28f9 | 2013-06-06 22:15:55 -0400 | [diff] [blame] | 475 | } |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 476 | |
| 477 | sd_config_write_same(sdkp); |
| 478 | |
| 479 | return count; |
| 480 | } |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 481 | static DEVICE_ATTR_RW(max_write_same_blocks); |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 482 | |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 483 | static struct attribute *sd_disk_attrs[] = { |
| 484 | &dev_attr_cache_type.attr, |
| 485 | &dev_attr_FUA.attr, |
| 486 | &dev_attr_allow_restart.attr, |
| 487 | &dev_attr_manage_start_stop.attr, |
| 488 | &dev_attr_protection_type.attr, |
| 489 | &dev_attr_protection_mode.attr, |
| 490 | &dev_attr_app_tag_own.attr, |
| 491 | &dev_attr_thin_provisioning.attr, |
| 492 | &dev_attr_provisioning_mode.attr, |
| 493 | &dev_attr_max_write_same_blocks.attr, |
| 494 | &dev_attr_max_medium_access_timeouts.attr, |
| 495 | NULL, |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 496 | }; |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 497 | ATTRIBUTE_GROUPS(sd_disk); |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 498 | |
| 499 | static struct class sd_disk_class = { |
| 500 | .name = "scsi_disk", |
| 501 | .owner = THIS_MODULE, |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 502 | .dev_release = scsi_disk_release, |
Greg Kroah-Hartman | e1ea235 | 2013-07-24 15:05:28 -0700 | [diff] [blame] | 503 | .dev_groups = sd_disk_groups, |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 504 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | |
Aaron Lu | 691e3d3 | 2012-11-09 15:27:55 +0800 | [diff] [blame] | 506 | static const struct dev_pm_ops sd_pm_ops = { |
Oliver Neukum | 9589791 | 2013-09-16 13:28:15 +0200 | [diff] [blame] | 507 | .suspend = sd_suspend_system, |
Aaron Lu | 691e3d3 | 2012-11-09 15:27:55 +0800 | [diff] [blame] | 508 | .resume = sd_resume, |
Oliver Neukum | 9589791 | 2013-09-16 13:28:15 +0200 | [diff] [blame] | 509 | .poweroff = sd_suspend_system, |
Aaron Lu | 691e3d3 | 2012-11-09 15:27:55 +0800 | [diff] [blame] | 510 | .restore = sd_resume, |
Oliver Neukum | 9589791 | 2013-09-16 13:28:15 +0200 | [diff] [blame] | 511 | .runtime_suspend = sd_suspend_runtime, |
Aaron Lu | 691e3d3 | 2012-11-09 15:27:55 +0800 | [diff] [blame] | 512 | .runtime_resume = sd_resume, |
| 513 | }; |
| 514 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | static struct scsi_driver sd_template = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | .gendrv = { |
| 517 | .name = "sd", |
Christoph Hellwig | 3af6b35 | 2014-11-12 18:34:51 +0100 | [diff] [blame] | 518 | .owner = THIS_MODULE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | .probe = sd_probe, |
| 520 | .remove = sd_remove, |
| 521 | .shutdown = sd_shutdown, |
Aaron Lu | 691e3d3 | 2012-11-09 15:27:55 +0800 | [diff] [blame] | 522 | .pm = &sd_pm_ops, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | }, |
| 524 | .rescan = sd_rescan, |
Christoph Hellwig | a1b73fc | 2014-05-01 16:51:04 +0200 | [diff] [blame] | 525 | .init_command = sd_init_command, |
| 526 | .uninit_command = sd_uninit_command, |
Linus Torvalds | 7b3d954 | 2008-01-06 10:17:12 -0800 | [diff] [blame] | 527 | .done = sd_done, |
Martin K. Petersen | 18a4d0a | 2012-02-09 13:48:53 -0500 | [diff] [blame] | 528 | .eh_action = sd_eh_action, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | }; |
| 530 | |
| 531 | /* |
Hannes Reinecke | 0761df9 | 2013-05-10 11:06:16 +0200 | [diff] [blame] | 532 | * Dummy kobj_map->probe function. |
| 533 | * The default ->probe function will call modprobe, which is |
| 534 | * pointless as this module is already loaded. |
| 535 | */ |
| 536 | static struct kobject *sd_default_probe(dev_t devt, int *partno, void *data) |
| 537 | { |
| 538 | return NULL; |
| 539 | } |
| 540 | |
| 541 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | * Device no to disk mapping: |
| 543 | * |
| 544 | * major disc2 disc p1 |
| 545 | * |............|.............|....|....| <- dev_t |
| 546 | * 31 20 19 8 7 4 3 0 |
| 547 | * |
| 548 | * Inside a major, we have 16k disks, however mapped non- |
| 549 | * contiguously. The first 16 disks are for major0, the next |
| 550 | * ones with major1, ... Disk 256 is for major0 again, disk 272 |
| 551 | * for major1, ... |
| 552 | * As we stay compatible with our numbering scheme, we can reuse |
| 553 | * the well-know SCSI majors 8, 65--71, 136--143. |
| 554 | */ |
| 555 | static int sd_major(int major_idx) |
| 556 | { |
| 557 | switch (major_idx) { |
| 558 | case 0: |
| 559 | return SCSI_DISK0_MAJOR; |
| 560 | case 1 ... 7: |
| 561 | return SCSI_DISK1_MAJOR + major_idx - 1; |
| 562 | case 8 ... 15: |
| 563 | return SCSI_DISK8_MAJOR + major_idx - 8; |
| 564 | default: |
| 565 | BUG(); |
| 566 | return 0; /* shut up gcc */ |
| 567 | } |
| 568 | } |
| 569 | |
Christoph Hellwig | 3d9a1f5 | 2015-02-02 14:01:25 +0100 | [diff] [blame] | 570 | static struct scsi_disk *scsi_disk_get(struct gendisk *disk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | { |
| 572 | struct scsi_disk *sdkp = NULL; |
| 573 | |
Christoph Hellwig | 3d9a1f5 | 2015-02-02 14:01:25 +0100 | [diff] [blame] | 574 | mutex_lock(&sd_ref_mutex); |
| 575 | |
Alan Stern | 39b7f1e | 2005-11-04 14:44:41 -0500 | [diff] [blame] | 576 | if (disk->private_data) { |
| 577 | sdkp = scsi_disk(disk); |
| 578 | if (scsi_device_get(sdkp->device) == 0) |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 579 | get_device(&sdkp->dev); |
Alan Stern | 39b7f1e | 2005-11-04 14:44:41 -0500 | [diff] [blame] | 580 | else |
| 581 | sdkp = NULL; |
| 582 | } |
Arjan van de Ven | 0b95067 | 2006-01-11 13:16:10 +0100 | [diff] [blame] | 583 | mutex_unlock(&sd_ref_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | return sdkp; |
| 585 | } |
| 586 | |
| 587 | static void scsi_disk_put(struct scsi_disk *sdkp) |
| 588 | { |
| 589 | struct scsi_device *sdev = sdkp->device; |
| 590 | |
Arjan van de Ven | 0b95067 | 2006-01-11 13:16:10 +0100 | [diff] [blame] | 591 | mutex_lock(&sd_ref_mutex); |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 592 | put_device(&sdkp->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | scsi_device_put(sdev); |
Arjan van de Ven | 0b95067 | 2006-01-11 13:16:10 +0100 | [diff] [blame] | 594 | mutex_unlock(&sd_ref_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | } |
| 596 | |
Martin K. Petersen | c611529 | 2014-09-26 19:20:08 -0400 | [diff] [blame] | 597 | static unsigned char sd_setup_protect_cmnd(struct scsi_cmnd *scmd, |
| 598 | unsigned int dix, unsigned int dif) |
| 599 | { |
| 600 | struct bio *bio = scmd->request->bio; |
| 601 | unsigned int prot_op = sd_prot_op(rq_data_dir(scmd->request), dix, dif); |
| 602 | unsigned int protect = 0; |
| 603 | |
| 604 | if (dix) { /* DIX Type 0, 1, 2, 3 */ |
| 605 | if (bio_integrity_flagged(bio, BIP_IP_CHECKSUM)) |
| 606 | scmd->prot_flags |= SCSI_PROT_IP_CHECKSUM; |
| 607 | |
| 608 | if (bio_integrity_flagged(bio, BIP_CTRL_NOCHECK) == false) |
| 609 | scmd->prot_flags |= SCSI_PROT_GUARD_CHECK; |
| 610 | } |
| 611 | |
Christoph Hellwig | 8475c81 | 2016-09-11 19:35:41 +0200 | [diff] [blame] | 612 | if (dif != T10_PI_TYPE3_PROTECTION) { /* DIX/DIF Type 0, 1, 2 */ |
Martin K. Petersen | c611529 | 2014-09-26 19:20:08 -0400 | [diff] [blame] | 613 | scmd->prot_flags |= SCSI_PROT_REF_INCREMENT; |
| 614 | |
| 615 | if (bio_integrity_flagged(bio, BIP_CTRL_NOCHECK) == false) |
| 616 | scmd->prot_flags |= SCSI_PROT_REF_CHECK; |
| 617 | } |
| 618 | |
| 619 | if (dif) { /* DIX/DIF Type 1, 2, 3 */ |
| 620 | scmd->prot_flags |= SCSI_PROT_TRANSFER_PI; |
| 621 | |
| 622 | if (bio_integrity_flagged(bio, BIP_DISK_NOCHECK)) |
| 623 | protect = 3 << 5; /* Disable target PI checking */ |
| 624 | else |
| 625 | protect = 1 << 5; /* Enable target PI checking */ |
Martin K. Petersen | 35e1a5d | 2009-09-18 17:33:00 -0400 | [diff] [blame] | 626 | } |
| 627 | |
| 628 | scsi_set_prot_op(scmd, prot_op); |
| 629 | scsi_set_prot_type(scmd, dif); |
Martin K. Petersen | c611529 | 2014-09-26 19:20:08 -0400 | [diff] [blame] | 630 | scmd->prot_flags &= sd_prot_flag_mask(prot_op); |
| 631 | |
| 632 | return protect; |
Martin K. Petersen | 35e1a5d | 2009-09-18 17:33:00 -0400 | [diff] [blame] | 633 | } |
| 634 | |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 635 | static void sd_config_discard(struct scsi_disk *sdkp, unsigned int mode) |
| 636 | { |
| 637 | struct request_queue *q = sdkp->disk->queue; |
| 638 | unsigned int logical_block_size = sdkp->device->sector_size; |
| 639 | unsigned int max_blocks = 0; |
| 640 | |
Martin K. Petersen | 7985090 | 2014-11-07 00:08:13 -0500 | [diff] [blame] | 641 | q->limits.discard_zeroes_data = 0; |
Martin K. Petersen | 3977372 | 2015-11-13 16:46:47 -0500 | [diff] [blame] | 642 | |
| 643 | /* |
| 644 | * When LBPRZ is reported, discard alignment and granularity |
| 645 | * must be fixed to the logical block size. Otherwise the block |
| 646 | * layer will drop misaligned portions of the request which can |
| 647 | * lead to data corruption. If LBPRZ is not set, we honor the |
| 648 | * device preference. |
| 649 | */ |
| 650 | if (sdkp->lbprz) { |
| 651 | q->limits.discard_alignment = 0; |
Martin K. Petersen | 6540a65 | 2016-03-05 17:52:02 -0500 | [diff] [blame] | 652 | q->limits.discard_granularity = logical_block_size; |
Martin K. Petersen | 3977372 | 2015-11-13 16:46:47 -0500 | [diff] [blame] | 653 | } else { |
| 654 | q->limits.discard_alignment = sdkp->unmap_alignment * |
| 655 | logical_block_size; |
| 656 | q->limits.discard_granularity = |
| 657 | max(sdkp->physical_block_size, |
| 658 | sdkp->unmap_granularity * logical_block_size); |
| 659 | } |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 660 | |
Martin K. Petersen | 8973039 | 2012-02-13 15:39:00 -0500 | [diff] [blame] | 661 | sdkp->provisioning_mode = mode; |
| 662 | |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 663 | switch (mode) { |
| 664 | |
| 665 | case SD_LBP_DISABLE: |
Jens Axboe | 2bb4cd5 | 2015-07-14 08:15:12 -0600 | [diff] [blame] | 666 | blk_queue_max_discard_sectors(q, 0); |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 667 | queue_flag_clear_unlocked(QUEUE_FLAG_DISCARD, q); |
| 668 | return; |
| 669 | |
| 670 | case SD_LBP_UNMAP: |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 671 | max_blocks = min_not_zero(sdkp->max_unmap_blocks, |
| 672 | (u32)SD_MAX_WS16_BLOCKS); |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 673 | break; |
| 674 | |
| 675 | case SD_LBP_WS16: |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 676 | max_blocks = min_not_zero(sdkp->max_ws_blocks, |
| 677 | (u32)SD_MAX_WS16_BLOCKS); |
Martin K. Petersen | 7985090 | 2014-11-07 00:08:13 -0500 | [diff] [blame] | 678 | q->limits.discard_zeroes_data = sdkp->lbprz; |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 679 | break; |
| 680 | |
| 681 | case SD_LBP_WS10: |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 682 | max_blocks = min_not_zero(sdkp->max_ws_blocks, |
| 683 | (u32)SD_MAX_WS10_BLOCKS); |
Martin K. Petersen | 7985090 | 2014-11-07 00:08:13 -0500 | [diff] [blame] | 684 | q->limits.discard_zeroes_data = sdkp->lbprz; |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 685 | break; |
| 686 | |
| 687 | case SD_LBP_ZERO: |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 688 | max_blocks = min_not_zero(sdkp->max_ws_blocks, |
| 689 | (u32)SD_MAX_WS10_BLOCKS); |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 690 | q->limits.discard_zeroes_data = 1; |
| 691 | break; |
| 692 | } |
| 693 | |
Jens Axboe | 2bb4cd5 | 2015-07-14 08:15:12 -0600 | [diff] [blame] | 694 | 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] | 695 | queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, q); |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 696 | } |
| 697 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | /** |
Martin K. Petersen | 26e85fc | 2012-09-18 12:19:31 -0400 | [diff] [blame] | 699 | * sd_setup_discard_cmnd - unmap blocks on thinly provisioned device |
Christoph Hellwig | 66ac028 | 2010-06-18 16:59:42 +0200 | [diff] [blame] | 700 | * @sdp: scsi device to operate one |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 701 | * @rq: Request to prepare |
| 702 | * |
| 703 | * Will issue either UNMAP or WRITE SAME(16) depending on preference |
| 704 | * indicated by target device. |
| 705 | **/ |
Christoph Hellwig | 6a7b439 | 2014-06-28 12:35:13 +0200 | [diff] [blame] | 706 | static int sd_setup_discard_cmnd(struct scsi_cmnd *cmd) |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 707 | { |
Christoph Hellwig | 6a7b439 | 2014-06-28 12:35:13 +0200 | [diff] [blame] | 708 | struct request *rq = cmd->request; |
| 709 | struct scsi_device *sdp = cmd->device; |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 710 | struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); |
Martin K. Petersen | 26e85fc | 2012-09-18 12:19:31 -0400 | [diff] [blame] | 711 | sector_t sector = blk_rq_pos(rq); |
| 712 | unsigned int nr_sectors = blk_rq_sectors(rq); |
| 713 | unsigned int nr_bytes = blk_rq_bytes(rq); |
Christoph Hellwig | 66ac028 | 2010-06-18 16:59:42 +0200 | [diff] [blame] | 714 | unsigned int len; |
FUJITA Tomonori | f1126e9 | 2010-07-01 19:49:18 +0900 | [diff] [blame] | 715 | int ret; |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 716 | char *buf; |
Christoph Hellwig | 66ac028 | 2010-06-18 16:59:42 +0200 | [diff] [blame] | 717 | struct page *page; |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 718 | |
Martin K. Petersen | 26e85fc | 2012-09-18 12:19:31 -0400 | [diff] [blame] | 719 | sector >>= ilog2(sdp->sector_size) - 9; |
| 720 | nr_sectors >>= ilog2(sdp->sector_size) - 9; |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 721 | |
Christoph Hellwig | 66ac028 | 2010-06-18 16:59:42 +0200 | [diff] [blame] | 722 | page = alloc_page(GFP_ATOMIC | __GFP_ZERO); |
| 723 | if (!page) |
| 724 | return BLKPREP_DEFER; |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 725 | |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 726 | switch (sdkp->provisioning_mode) { |
| 727 | case SD_LBP_UNMAP: |
| 728 | buf = page_address(page); |
Christoph Hellwig | 66ac028 | 2010-06-18 16:59:42 +0200 | [diff] [blame] | 729 | |
Christoph Hellwig | 6a7b439 | 2014-06-28 12:35:13 +0200 | [diff] [blame] | 730 | cmd->cmd_len = 10; |
| 731 | cmd->cmnd[0] = UNMAP; |
| 732 | cmd->cmnd[8] = 24; |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 733 | |
| 734 | put_unaligned_be16(6 + 16, &buf[0]); |
| 735 | put_unaligned_be16(16, &buf[2]); |
| 736 | put_unaligned_be64(sector, &buf[8]); |
Christoph Hellwig | 66ac028 | 2010-06-18 16:59:42 +0200 | [diff] [blame] | 737 | put_unaligned_be32(nr_sectors, &buf[16]); |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 738 | |
Christoph Hellwig | 66ac028 | 2010-06-18 16:59:42 +0200 | [diff] [blame] | 739 | len = 24; |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 740 | break; |
| 741 | |
| 742 | case SD_LBP_WS16: |
Christoph Hellwig | 6a7b439 | 2014-06-28 12:35:13 +0200 | [diff] [blame] | 743 | cmd->cmd_len = 16; |
| 744 | cmd->cmnd[0] = WRITE_SAME_16; |
| 745 | cmd->cmnd[1] = 0x8; /* UNMAP */ |
| 746 | put_unaligned_be64(sector, &cmd->cmnd[2]); |
| 747 | put_unaligned_be32(nr_sectors, &cmd->cmnd[10]); |
Christoph Hellwig | 66ac028 | 2010-06-18 16:59:42 +0200 | [diff] [blame] | 748 | |
| 749 | len = sdkp->device->sector_size; |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 750 | break; |
| 751 | |
| 752 | case SD_LBP_WS10: |
| 753 | case SD_LBP_ZERO: |
Christoph Hellwig | 6a7b439 | 2014-06-28 12:35:13 +0200 | [diff] [blame] | 754 | cmd->cmd_len = 10; |
| 755 | cmd->cmnd[0] = WRITE_SAME; |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 756 | if (sdkp->provisioning_mode == SD_LBP_WS10) |
Christoph Hellwig | 6a7b439 | 2014-06-28 12:35:13 +0200 | [diff] [blame] | 757 | cmd->cmnd[1] = 0x8; /* UNMAP */ |
| 758 | put_unaligned_be32(sector, &cmd->cmnd[2]); |
| 759 | put_unaligned_be16(nr_sectors, &cmd->cmnd[7]); |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 760 | |
| 761 | len = sdkp->device->sector_size; |
| 762 | break; |
| 763 | |
| 764 | default: |
Martin K. Petersen | 0fb5b1f | 2016-02-04 00:52:12 -0500 | [diff] [blame] | 765 | ret = BLKPREP_INVALID; |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 766 | goto out; |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 767 | } |
| 768 | |
Jens Axboe | dc4a930 | 2014-04-16 21:37:30 -0600 | [diff] [blame] | 769 | rq->completion_data = page; |
Subhash Jadavani | 70e7588 | 2016-08-12 16:44:37 -0700 | [diff] [blame] | 770 | if (likely(!sdp->timeout_override)) |
| 771 | rq->timeout = SD_TIMEOUT; |
| 772 | else |
| 773 | rq->timeout = sdp->timeout_override; |
Christoph Hellwig | 6a7b439 | 2014-06-28 12:35:13 +0200 | [diff] [blame] | 774 | |
| 775 | cmd->transfersize = len; |
Christoph Hellwig | e4200f8 | 2014-06-28 16:18:59 +0200 | [diff] [blame] | 776 | cmd->allowed = SD_MAX_RETRIES; |
Christoph Hellwig | 6a7b439 | 2014-06-28 12:35:13 +0200 | [diff] [blame] | 777 | |
| 778 | /* |
| 779 | * Initially __data_len is set to the amount of data that needs to be |
| 780 | * transferred to the target. This amount depends on whether WRITE SAME |
| 781 | * or UNMAP is being used. After the scatterlist has been mapped by |
| 782 | * scsi_init_io() we set __data_len to the size of the area to be |
| 783 | * discarded on disk. This allows us to report completion on the full |
| 784 | * amount of blocks described by the request. |
| 785 | */ |
Ming Lin | 37e5823 | 2016-03-22 00:24:44 -0700 | [diff] [blame] | 786 | blk_add_request_payload(rq, page, 0, len); |
Christoph Hellwig | 3c356bd | 2014-09-05 18:20:23 -0700 | [diff] [blame] | 787 | ret = scsi_init_io(cmd); |
Martin K. Petersen | 26e85fc | 2012-09-18 12:19:31 -0400 | [diff] [blame] | 788 | rq->__data_len = nr_bytes; |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 789 | |
| 790 | out: |
Jens Axboe | b4f42e2 | 2014-04-10 09:46:28 -0600 | [diff] [blame] | 791 | if (ret != BLKPREP_OK) |
FUJITA Tomonori | 610a634 | 2010-07-08 10:16:17 +0200 | [diff] [blame] | 792 | __free_page(page); |
FUJITA Tomonori | f1126e9 | 2010-07-01 19:49:18 +0900 | [diff] [blame] | 793 | return ret; |
| 794 | } |
| 795 | |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 796 | static void sd_config_write_same(struct scsi_disk *sdkp) |
| 797 | { |
| 798 | struct request_queue *q = sdkp->disk->queue; |
| 799 | unsigned int logical_block_size = sdkp->device->sector_size; |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 800 | |
| 801 | if (sdkp->device->no_write_same) { |
| 802 | sdkp->max_ws_blocks = 0; |
| 803 | goto out; |
| 804 | } |
| 805 | |
| 806 | /* Some devices can not handle block counts above 0xffff despite |
| 807 | * supporting WRITE SAME(16). Consequently we default to 64k |
| 808 | * blocks per I/O unless the device explicitly advertises a |
| 809 | * bigger limit. |
| 810 | */ |
Martin K. Petersen | 66c28f9 | 2013-06-06 22:15:55 -0400 | [diff] [blame] | 811 | if (sdkp->max_ws_blocks > SD_MAX_WS10_BLOCKS) |
| 812 | sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks, |
| 813 | (u32)SD_MAX_WS16_BLOCKS); |
| 814 | else if (sdkp->ws16 || sdkp->ws10 || sdkp->device->no_report_opcodes) |
| 815 | sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks, |
| 816 | (u32)SD_MAX_WS10_BLOCKS); |
| 817 | else { |
| 818 | sdkp->device->no_write_same = 1; |
| 819 | sdkp->max_ws_blocks = 0; |
| 820 | } |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 821 | |
| 822 | out: |
Martin K. Petersen | 66c28f9 | 2013-06-06 22:15:55 -0400 | [diff] [blame] | 823 | blk_queue_max_write_same_sectors(q, sdkp->max_ws_blocks * |
| 824 | (logical_block_size >> 9)); |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 825 | } |
| 826 | |
| 827 | /** |
| 828 | * sd_setup_write_same_cmnd - write the same data to multiple blocks |
Christoph Hellwig | 59b1134 | 2014-06-28 12:22:22 +0200 | [diff] [blame] | 829 | * @cmd: command to prepare |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 830 | * |
| 831 | * Will issue either WRITE SAME(10) or WRITE SAME(16) depending on |
| 832 | * preference indicated by target device. |
| 833 | **/ |
Christoph Hellwig | 59b1134 | 2014-06-28 12:22:22 +0200 | [diff] [blame] | 834 | static int sd_setup_write_same_cmnd(struct scsi_cmnd *cmd) |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 835 | { |
Christoph Hellwig | 59b1134 | 2014-06-28 12:22:22 +0200 | [diff] [blame] | 836 | struct request *rq = cmd->request; |
| 837 | struct scsi_device *sdp = cmd->device; |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 838 | struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); |
| 839 | struct bio *bio = rq->bio; |
| 840 | sector_t sector = blk_rq_pos(rq); |
| 841 | unsigned int nr_sectors = blk_rq_sectors(rq); |
| 842 | unsigned int nr_bytes = blk_rq_bytes(rq); |
| 843 | int ret; |
| 844 | |
| 845 | if (sdkp->device->no_write_same) |
Martin K. Petersen | 0fb5b1f | 2016-02-04 00:52:12 -0500 | [diff] [blame] | 846 | return BLKPREP_INVALID; |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 847 | |
Kent Overstreet | a4ad39b1 | 2013-08-07 14:24:32 -0700 | [diff] [blame] | 848 | 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] | 849 | |
| 850 | sector >>= ilog2(sdp->sector_size) - 9; |
| 851 | nr_sectors >>= ilog2(sdp->sector_size) - 9; |
| 852 | |
Subhash Jadavani | 70e7588 | 2016-08-12 16:44:37 -0700 | [diff] [blame] | 853 | if (likely(!sdp->timeout_override)) |
| 854 | rq->timeout = SD_WRITE_SAME_TIMEOUT; |
| 855 | else |
| 856 | rq->timeout = sdp->timeout_override; |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 857 | |
| 858 | if (sdkp->ws16 || sector > 0xffffffff || nr_sectors > 0xffff) { |
Christoph Hellwig | 59b1134 | 2014-06-28 12:22:22 +0200 | [diff] [blame] | 859 | cmd->cmd_len = 16; |
| 860 | cmd->cmnd[0] = WRITE_SAME_16; |
| 861 | put_unaligned_be64(sector, &cmd->cmnd[2]); |
| 862 | put_unaligned_be32(nr_sectors, &cmd->cmnd[10]); |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 863 | } else { |
Christoph Hellwig | 59b1134 | 2014-06-28 12:22:22 +0200 | [diff] [blame] | 864 | cmd->cmd_len = 10; |
| 865 | cmd->cmnd[0] = WRITE_SAME; |
| 866 | put_unaligned_be32(sector, &cmd->cmnd[2]); |
| 867 | put_unaligned_be16(nr_sectors, &cmd->cmnd[7]); |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 868 | } |
| 869 | |
Christoph Hellwig | 59b1134 | 2014-06-28 12:22:22 +0200 | [diff] [blame] | 870 | cmd->transfersize = sdp->sector_size; |
Christoph Hellwig | a25ee54 | 2014-06-28 12:29:19 +0200 | [diff] [blame] | 871 | cmd->allowed = SD_MAX_RETRIES; |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 872 | |
Christoph Hellwig | 59b1134 | 2014-06-28 12:22:22 +0200 | [diff] [blame] | 873 | /* |
| 874 | * For WRITE_SAME the data transferred in the DATA IN buffer is |
| 875 | * different from the amount of data actually written to the target. |
| 876 | * |
| 877 | * We set up __data_len to the amount of data transferred from the |
| 878 | * DATA IN buffer so that blk_rq_map_sg set up the proper S/G list |
| 879 | * to transfer a single sector of data first, but then reset it to |
| 880 | * the amount of data to be written right after so that the I/O path |
| 881 | * knows how much to actually write. |
| 882 | */ |
| 883 | rq->__data_len = sdp->sector_size; |
Christoph Hellwig | 3c356bd | 2014-09-05 18:20:23 -0700 | [diff] [blame] | 884 | ret = scsi_init_io(cmd); |
Christoph Hellwig | 59b1134 | 2014-06-28 12:22:22 +0200 | [diff] [blame] | 885 | rq->__data_len = nr_bytes; |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 886 | return ret; |
| 887 | } |
| 888 | |
Christoph Hellwig | a118c6c | 2014-06-28 12:08:05 +0200 | [diff] [blame] | 889 | static int sd_setup_flush_cmnd(struct scsi_cmnd *cmd) |
FUJITA Tomonori | 90467c2 | 2010-07-03 17:45:34 +0900 | [diff] [blame] | 890 | { |
Christoph Hellwig | a118c6c | 2014-06-28 12:08:05 +0200 | [diff] [blame] | 891 | struct request *rq = cmd->request; |
FUJITA Tomonori | 90467c2 | 2010-07-03 17:45:34 +0900 | [diff] [blame] | 892 | |
Christoph Hellwig | a118c6c | 2014-06-28 12:08:05 +0200 | [diff] [blame] | 893 | /* flush requests don't perform I/O, zero the S/G table */ |
| 894 | memset(&cmd->sdb, 0, sizeof(cmd->sdb)); |
| 895 | |
| 896 | cmd->cmnd[0] = SYNCHRONIZE_CACHE; |
| 897 | cmd->cmd_len = 10; |
| 898 | cmd->transfersize = 0; |
| 899 | cmd->allowed = SD_MAX_RETRIES; |
| 900 | |
K. Y. Srinivasan | 26b9fd8 | 2014-07-18 17:11:27 +0200 | [diff] [blame] | 901 | rq->timeout = rq->q->rq_timeout * SD_FLUSH_TIMEOUT_MULTIPLIER; |
Christoph Hellwig | a118c6c | 2014-06-28 12:08:05 +0200 | [diff] [blame] | 902 | return BLKPREP_OK; |
FUJITA Tomonori | 90467c2 | 2010-07-03 17:45:34 +0900 | [diff] [blame] | 903 | } |
| 904 | |
Christoph Hellwig | 87949ee | 2014-06-28 12:40:18 +0200 | [diff] [blame] | 905 | static int sd_setup_read_write_cmnd(struct scsi_cmnd *SCpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 906 | { |
Christoph Hellwig | a1b73fc | 2014-05-01 16:51:04 +0200 | [diff] [blame] | 907 | struct request *rq = SCpnt->request; |
| 908 | struct scsi_device *sdp = SCpnt->device; |
Christoph Hellwig | 776b23a | 2006-01-06 18:34:07 +0100 | [diff] [blame] | 909 | struct gendisk *disk = rq->rq_disk; |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 910 | struct scsi_disk *sdkp; |
Tejun Heo | 83096eb | 2009-05-07 22:24:39 +0900 | [diff] [blame] | 911 | sector_t block = blk_rq_pos(rq); |
Linus Torvalds | 1835107 | 2008-08-05 21:42:21 -0700 | [diff] [blame] | 912 | sector_t threshold; |
Tejun Heo | 83096eb | 2009-05-07 22:24:39 +0900 | [diff] [blame] | 913 | unsigned int this_count = blk_rq_sectors(rq); |
Martin K. Petersen | c611529 | 2014-09-26 19:20:08 -0400 | [diff] [blame] | 914 | unsigned int dif, dix; |
| 915 | int ret; |
Martin K. Petersen | 4e7392e | 2009-09-20 16:49:38 -0400 | [diff] [blame] | 916 | unsigned char protect; |
James Bottomley | 7f9a6bc | 2007-08-04 10:06:25 -0500 | [diff] [blame] | 917 | |
Christoph Hellwig | 3c356bd | 2014-09-05 18:20:23 -0700 | [diff] [blame] | 918 | ret = scsi_init_io(SCpnt); |
James Bottomley | 7f9a6bc | 2007-08-04 10:06:25 -0500 | [diff] [blame] | 919 | if (ret != BLKPREP_OK) |
| 920 | goto out; |
| 921 | SCpnt = rq->special; |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 922 | sdkp = scsi_disk(disk); |
James Bottomley | 7f9a6bc | 2007-08-04 10:06:25 -0500 | [diff] [blame] | 923 | |
| 924 | /* from here on until we're complete, any goto out |
| 925 | * is used for a killable error condition */ |
| 926 | ret = BLKPREP_KILL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 927 | |
Christoph Hellwig | a1b73fc | 2014-05-01 16:51:04 +0200 | [diff] [blame] | 928 | SCSI_LOG_HLQUEUE(1, |
| 929 | scmd_printk(KERN_INFO, SCpnt, |
| 930 | "%s: block=%llu, count=%d\n", |
| 931 | __func__, (unsigned long long)block, this_count)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 932 | |
| 933 | if (!sdp || !scsi_device_online(sdp) || |
Tejun Heo | 83096eb | 2009-05-07 22:24:39 +0900 | [diff] [blame] | 934 | block + blk_rq_sectors(rq) > get_capacity(disk)) { |
Martin K. Petersen | fa0d34b | 2007-02-27 22:41:19 -0500 | [diff] [blame] | 935 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
Tejun Heo | 83096eb | 2009-05-07 22:24:39 +0900 | [diff] [blame] | 936 | "Finishing %u sectors\n", |
| 937 | blk_rq_sectors(rq))); |
Martin K. Petersen | fa0d34b | 2007-02-27 22:41:19 -0500 | [diff] [blame] | 938 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
| 939 | "Retry with 0x%p\n", SCpnt)); |
James Bottomley | 7f9a6bc | 2007-08-04 10:06:25 -0500 | [diff] [blame] | 940 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 941 | } |
| 942 | |
| 943 | if (sdp->changed) { |
| 944 | /* |
| 945 | * quietly refuse to do anything to a changed disc until |
| 946 | * the changed bit has been reset |
| 947 | */ |
Alan Stern | 3ff5588 | 2010-09-07 11:44:01 -0400 | [diff] [blame] | 948 | /* 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] | 949 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 950 | } |
James Bottomley | 7f9a6bc | 2007-08-04 10:06:25 -0500 | [diff] [blame] | 951 | |
Hans de Goede | a0899d4 | 2008-01-20 11:12:26 +0100 | [diff] [blame] | 952 | /* |
Linus Torvalds | 1835107 | 2008-08-05 21:42:21 -0700 | [diff] [blame] | 953 | * Some SD card readers can't handle multi-sector accesses which touch |
| 954 | * the last one or two hardware sectors. Split accesses as needed. |
Hans de Goede | a0899d4 | 2008-01-20 11:12:26 +0100 | [diff] [blame] | 955 | */ |
Linus Torvalds | 1835107 | 2008-08-05 21:42:21 -0700 | [diff] [blame] | 956 | threshold = get_capacity(disk) - SD_LAST_BUGGY_SECTORS * |
| 957 | (sdp->sector_size / 512); |
| 958 | |
| 959 | if (unlikely(sdp->last_sector_bug && block + this_count > threshold)) { |
| 960 | if (block < threshold) { |
| 961 | /* Access up to the threshold but not beyond */ |
| 962 | this_count = threshold - block; |
| 963 | } else { |
| 964 | /* Access only a single hardware sector */ |
| 965 | this_count = sdp->sector_size / 512; |
| 966 | } |
| 967 | } |
Hans de Goede | a0899d4 | 2008-01-20 11:12:26 +0100 | [diff] [blame] | 968 | |
Martin K. Petersen | fa0d34b | 2007-02-27 22:41:19 -0500 | [diff] [blame] | 969 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, "block=%llu\n", |
| 970 | (unsigned long long)block)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 971 | |
| 972 | /* |
| 973 | * If we have a 1K hardware sectorsize, prevent access to single |
| 974 | * 512 byte sectors. In theory we could handle this - in fact |
| 975 | * the scsi cdrom driver must be able to handle this because |
| 976 | * we typically use 1K blocksizes, and cdroms typically have |
| 977 | * 2K hardware sectorsizes. Of course, things are simpler |
| 978 | * with the cdrom, since it is read-only. For performance |
| 979 | * reasons, the filesystems should be able to handle this |
| 980 | * and not force the scsi disk driver to use bounce buffers |
| 981 | * for this. |
| 982 | */ |
| 983 | if (sdp->sector_size == 1024) { |
Tejun Heo | 83096eb | 2009-05-07 22:24:39 +0900 | [diff] [blame] | 984 | if ((block & 1) || (blk_rq_sectors(rq) & 1)) { |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 985 | scmd_printk(KERN_ERR, SCpnt, |
| 986 | "Bad block number requested\n"); |
James Bottomley | 7f9a6bc | 2007-08-04 10:06:25 -0500 | [diff] [blame] | 987 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 988 | } else { |
| 989 | block = block >> 1; |
| 990 | this_count = this_count >> 1; |
| 991 | } |
| 992 | } |
| 993 | if (sdp->sector_size == 2048) { |
Tejun Heo | 83096eb | 2009-05-07 22:24:39 +0900 | [diff] [blame] | 994 | if ((block & 3) || (blk_rq_sectors(rq) & 3)) { |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 995 | scmd_printk(KERN_ERR, SCpnt, |
| 996 | "Bad block number requested\n"); |
James Bottomley | 7f9a6bc | 2007-08-04 10:06:25 -0500 | [diff] [blame] | 997 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 998 | } else { |
| 999 | block = block >> 2; |
| 1000 | this_count = this_count >> 2; |
| 1001 | } |
| 1002 | } |
| 1003 | if (sdp->sector_size == 4096) { |
Tejun Heo | 83096eb | 2009-05-07 22:24:39 +0900 | [diff] [blame] | 1004 | if ((block & 7) || (blk_rq_sectors(rq) & 7)) { |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 1005 | scmd_printk(KERN_ERR, SCpnt, |
| 1006 | "Bad block number requested\n"); |
James Bottomley | 7f9a6bc | 2007-08-04 10:06:25 -0500 | [diff] [blame] | 1007 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1008 | } else { |
| 1009 | block = block >> 3; |
| 1010 | this_count = this_count >> 3; |
| 1011 | } |
| 1012 | } |
| 1013 | if (rq_data_dir(rq) == WRITE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1014 | SCpnt->cmnd[0] = WRITE_6; |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 1015 | |
Martin K. Petersen | 8c579ab | 2012-08-28 14:29:33 -0400 | [diff] [blame] | 1016 | if (blk_integrity_rq(rq)) |
Martin K. Petersen | c611529 | 2014-09-26 19:20:08 -0400 | [diff] [blame] | 1017 | sd_dif_prepare(SCpnt); |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 1018 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1019 | } else if (rq_data_dir(rq) == READ) { |
| 1020 | SCpnt->cmnd[0] = READ_6; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1021 | } else { |
Mike Christie | 4e1b2d52 | 2016-06-05 14:32:22 -0500 | [diff] [blame] | 1022 | scmd_printk(KERN_ERR, SCpnt, "Unknown command %llu,%llx\n", |
Mike Christie | c2df40d | 2016-06-05 14:32:17 -0500 | [diff] [blame] | 1023 | req_op(rq), (unsigned long long) rq->cmd_flags); |
James Bottomley | 7f9a6bc | 2007-08-04 10:06:25 -0500 | [diff] [blame] | 1024 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1025 | } |
| 1026 | |
Martin K. Petersen | fa0d34b | 2007-02-27 22:41:19 -0500 | [diff] [blame] | 1027 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
Tejun Heo | 83096eb | 2009-05-07 22:24:39 +0900 | [diff] [blame] | 1028 | "%s %d/%u 512 byte blocks.\n", |
Martin K. Petersen | fa0d34b | 2007-02-27 22:41:19 -0500 | [diff] [blame] | 1029 | (rq_data_dir(rq) == WRITE) ? |
| 1030 | "writing" : "reading", this_count, |
Tejun Heo | 83096eb | 2009-05-07 22:24:39 +0900 | [diff] [blame] | 1031 | blk_rq_sectors(rq))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1032 | |
Martin K. Petersen | c611529 | 2014-09-26 19:20:08 -0400 | [diff] [blame] | 1033 | dix = scsi_prot_sg_count(SCpnt); |
| 1034 | dif = scsi_host_dif_capable(SCpnt->device->host, sdkp->protection_type); |
| 1035 | |
| 1036 | if (dif || dix) |
| 1037 | protect = sd_setup_protect_cmnd(SCpnt, dix, dif); |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 1038 | else |
Martin K. Petersen | 4e7392e | 2009-09-20 16:49:38 -0400 | [diff] [blame] | 1039 | protect = 0; |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 1040 | |
Christoph Hellwig | 8475c81 | 2016-09-11 19:35:41 +0200 | [diff] [blame] | 1041 | if (protect && sdkp->protection_type == T10_PI_TYPE2_PROTECTION) { |
Martin K. Petersen | 4e7392e | 2009-09-20 16:49:38 -0400 | [diff] [blame] | 1042 | SCpnt->cmnd = mempool_alloc(sd_cdb_pool, GFP_ATOMIC); |
| 1043 | |
| 1044 | if (unlikely(SCpnt->cmnd == NULL)) { |
| 1045 | ret = BLKPREP_DEFER; |
| 1046 | goto out; |
| 1047 | } |
| 1048 | |
| 1049 | SCpnt->cmd_len = SD_EXT_CDB_SIZE; |
| 1050 | memset(SCpnt->cmnd, 0, SCpnt->cmd_len); |
| 1051 | SCpnt->cmnd[0] = VARIABLE_LENGTH_CMD; |
| 1052 | SCpnt->cmnd[7] = 0x18; |
| 1053 | SCpnt->cmnd[9] = (rq_data_dir(rq) == READ) ? READ_32 : WRITE_32; |
Christoph Hellwig | 33659eb | 2010-08-07 18:17:56 +0200 | [diff] [blame] | 1054 | SCpnt->cmnd[10] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
Martin K. Petersen | 4e7392e | 2009-09-20 16:49:38 -0400 | [diff] [blame] | 1055 | |
| 1056 | /* LBA */ |
| 1057 | SCpnt->cmnd[12] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0; |
| 1058 | SCpnt->cmnd[13] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0; |
| 1059 | SCpnt->cmnd[14] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0; |
| 1060 | SCpnt->cmnd[15] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0; |
| 1061 | SCpnt->cmnd[16] = (unsigned char) (block >> 24) & 0xff; |
| 1062 | SCpnt->cmnd[17] = (unsigned char) (block >> 16) & 0xff; |
| 1063 | SCpnt->cmnd[18] = (unsigned char) (block >> 8) & 0xff; |
| 1064 | SCpnt->cmnd[19] = (unsigned char) block & 0xff; |
| 1065 | |
| 1066 | /* Expected Indirect LBA */ |
| 1067 | SCpnt->cmnd[20] = (unsigned char) (block >> 24) & 0xff; |
| 1068 | SCpnt->cmnd[21] = (unsigned char) (block >> 16) & 0xff; |
| 1069 | SCpnt->cmnd[22] = (unsigned char) (block >> 8) & 0xff; |
| 1070 | SCpnt->cmnd[23] = (unsigned char) block & 0xff; |
| 1071 | |
| 1072 | /* Transfer length */ |
| 1073 | SCpnt->cmnd[28] = (unsigned char) (this_count >> 24) & 0xff; |
| 1074 | SCpnt->cmnd[29] = (unsigned char) (this_count >> 16) & 0xff; |
| 1075 | SCpnt->cmnd[30] = (unsigned char) (this_count >> 8) & 0xff; |
| 1076 | SCpnt->cmnd[31] = (unsigned char) this_count & 0xff; |
Akinobu Mita | e430cbc | 2014-06-02 22:56:47 +0900 | [diff] [blame] | 1077 | } else if (sdp->use_16_for_rw || (this_count > 0xffff)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1078 | SCpnt->cmnd[0] += READ_16 - READ_6; |
Christoph Hellwig | 33659eb | 2010-08-07 18:17:56 +0200 | [diff] [blame] | 1079 | SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1080 | SCpnt->cmnd[2] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0; |
| 1081 | SCpnt->cmnd[3] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0; |
| 1082 | SCpnt->cmnd[4] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0; |
| 1083 | SCpnt->cmnd[5] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0; |
| 1084 | SCpnt->cmnd[6] = (unsigned char) (block >> 24) & 0xff; |
| 1085 | SCpnt->cmnd[7] = (unsigned char) (block >> 16) & 0xff; |
| 1086 | SCpnt->cmnd[8] = (unsigned char) (block >> 8) & 0xff; |
| 1087 | SCpnt->cmnd[9] = (unsigned char) block & 0xff; |
| 1088 | SCpnt->cmnd[10] = (unsigned char) (this_count >> 24) & 0xff; |
| 1089 | SCpnt->cmnd[11] = (unsigned char) (this_count >> 16) & 0xff; |
| 1090 | SCpnt->cmnd[12] = (unsigned char) (this_count >> 8) & 0xff; |
| 1091 | SCpnt->cmnd[13] = (unsigned char) this_count & 0xff; |
| 1092 | SCpnt->cmnd[14] = SCpnt->cmnd[15] = 0; |
| 1093 | } else if ((this_count > 0xff) || (block > 0x1fffff) || |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 1094 | scsi_device_protection(SCpnt->device) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1095 | SCpnt->device->use_10_for_rw) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1096 | SCpnt->cmnd[0] += READ_10 - READ_6; |
Christoph Hellwig | 33659eb | 2010-08-07 18:17:56 +0200 | [diff] [blame] | 1097 | SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1098 | SCpnt->cmnd[2] = (unsigned char) (block >> 24) & 0xff; |
| 1099 | SCpnt->cmnd[3] = (unsigned char) (block >> 16) & 0xff; |
| 1100 | SCpnt->cmnd[4] = (unsigned char) (block >> 8) & 0xff; |
| 1101 | SCpnt->cmnd[5] = (unsigned char) block & 0xff; |
| 1102 | SCpnt->cmnd[6] = SCpnt->cmnd[9] = 0; |
| 1103 | SCpnt->cmnd[7] = (unsigned char) (this_count >> 8) & 0xff; |
| 1104 | SCpnt->cmnd[8] = (unsigned char) this_count & 0xff; |
| 1105 | } else { |
Christoph Hellwig | 33659eb | 2010-08-07 18:17:56 +0200 | [diff] [blame] | 1106 | if (unlikely(rq->cmd_flags & REQ_FUA)) { |
Tejun Heo | 007365a | 2006-01-06 09:53:52 +0100 | [diff] [blame] | 1107 | /* |
| 1108 | * This happens only if this drive failed |
| 1109 | * 10byte rw command with ILLEGAL_REQUEST |
| 1110 | * during operation and thus turned off |
| 1111 | * use_10_for_rw. |
| 1112 | */ |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 1113 | scmd_printk(KERN_ERR, SCpnt, |
| 1114 | "FUA write on READ/WRITE(6) drive\n"); |
James Bottomley | 7f9a6bc | 2007-08-04 10:06:25 -0500 | [diff] [blame] | 1115 | goto out; |
Tejun Heo | 007365a | 2006-01-06 09:53:52 +0100 | [diff] [blame] | 1116 | } |
| 1117 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1118 | SCpnt->cmnd[1] |= (unsigned char) ((block >> 16) & 0x1f); |
| 1119 | SCpnt->cmnd[2] = (unsigned char) ((block >> 8) & 0xff); |
| 1120 | SCpnt->cmnd[3] = (unsigned char) block & 0xff; |
| 1121 | SCpnt->cmnd[4] = (unsigned char) this_count; |
| 1122 | SCpnt->cmnd[5] = 0; |
| 1123 | } |
Boaz Harrosh | 30b0c37 | 2007-12-13 13:47:40 +0200 | [diff] [blame] | 1124 | SCpnt->sdb.length = this_count * sdp->sector_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1125 | |
| 1126 | /* |
| 1127 | * We shouldn't disconnect in the middle of a sector, so with a dumb |
| 1128 | * host adapter, it's safe to assume that we can at least transfer |
| 1129 | * this many bytes between each connect / disconnect. |
| 1130 | */ |
| 1131 | SCpnt->transfersize = sdp->sector_size; |
| 1132 | SCpnt->underflow = this_count << 9; |
| 1133 | SCpnt->allowed = SD_MAX_RETRIES; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1134 | |
| 1135 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1136 | * This indicates that the command is ready from our end to be |
| 1137 | * queued. |
| 1138 | */ |
James Bottomley | 7f9a6bc | 2007-08-04 10:06:25 -0500 | [diff] [blame] | 1139 | ret = BLKPREP_OK; |
| 1140 | out: |
Christoph Hellwig | a1b73fc | 2014-05-01 16:51:04 +0200 | [diff] [blame] | 1141 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1142 | } |
| 1143 | |
Christoph Hellwig | 87949ee | 2014-06-28 12:40:18 +0200 | [diff] [blame] | 1144 | static int sd_init_command(struct scsi_cmnd *cmd) |
| 1145 | { |
| 1146 | struct request *rq = cmd->request; |
| 1147 | |
Mike Christie | c2df40d | 2016-06-05 14:32:17 -0500 | [diff] [blame] | 1148 | switch (req_op(rq)) { |
| 1149 | case REQ_OP_DISCARD: |
Christoph Hellwig | 87949ee | 2014-06-28 12:40:18 +0200 | [diff] [blame] | 1150 | return sd_setup_discard_cmnd(cmd); |
Mike Christie | c2df40d | 2016-06-05 14:32:17 -0500 | [diff] [blame] | 1151 | case REQ_OP_WRITE_SAME: |
Christoph Hellwig | 87949ee | 2014-06-28 12:40:18 +0200 | [diff] [blame] | 1152 | return sd_setup_write_same_cmnd(cmd); |
Mike Christie | 3a5e02c | 2016-06-05 14:32:23 -0500 | [diff] [blame] | 1153 | case REQ_OP_FLUSH: |
Christoph Hellwig | 87949ee | 2014-06-28 12:40:18 +0200 | [diff] [blame] | 1154 | return sd_setup_flush_cmnd(cmd); |
Mike Christie | c2df40d | 2016-06-05 14:32:17 -0500 | [diff] [blame] | 1155 | case REQ_OP_READ: |
| 1156 | case REQ_OP_WRITE: |
Christoph Hellwig | 87949ee | 2014-06-28 12:40:18 +0200 | [diff] [blame] | 1157 | return sd_setup_read_write_cmnd(cmd); |
Mike Christie | c2df40d | 2016-06-05 14:32:17 -0500 | [diff] [blame] | 1158 | default: |
| 1159 | BUG(); |
| 1160 | } |
Christoph Hellwig | 87949ee | 2014-06-28 12:40:18 +0200 | [diff] [blame] | 1161 | } |
| 1162 | |
| 1163 | static void sd_uninit_command(struct scsi_cmnd *SCpnt) |
| 1164 | { |
| 1165 | struct request *rq = SCpnt->request; |
| 1166 | |
Mike Christie | c2df40d | 2016-06-05 14:32:17 -0500 | [diff] [blame] | 1167 | if (req_op(rq) == REQ_OP_DISCARD) |
Christoph Hellwig | 87949ee | 2014-06-28 12:40:18 +0200 | [diff] [blame] | 1168 | __free_page(rq->completion_data); |
| 1169 | |
| 1170 | if (SCpnt->cmnd != rq->cmd) { |
| 1171 | mempool_free(SCpnt->cmnd, sd_cdb_pool); |
| 1172 | SCpnt->cmnd = NULL; |
| 1173 | SCpnt->cmd_len = 0; |
| 1174 | } |
| 1175 | } |
| 1176 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1177 | /** |
| 1178 | * sd_open - open a scsi disk device |
| 1179 | * @inode: only i_rdev member may be used |
| 1180 | * @filp: only f_mode and f_flags may be used |
| 1181 | * |
| 1182 | * Returns 0 if successful. Returns a negated errno value in case |
| 1183 | * of error. |
| 1184 | * |
| 1185 | * Note: This can be called from a user context (e.g. fsck(1) ) |
| 1186 | * or from within the kernel (e.g. as a result of a mount(1) ). |
| 1187 | * In the latter case @inode and @filp carry an abridged amount |
| 1188 | * of information as noted above. |
Arnd Bergmann | 409f349 | 2010-07-07 16:51:29 +0200 | [diff] [blame] | 1189 | * |
| 1190 | * Locking: called with bdev->bd_mutex held. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1191 | **/ |
Al Viro | 0338e29 | 2008-03-02 10:41:04 -0500 | [diff] [blame] | 1192 | static int sd_open(struct block_device *bdev, fmode_t mode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1193 | { |
Al Viro | 0338e29 | 2008-03-02 10:41:04 -0500 | [diff] [blame] | 1194 | struct scsi_disk *sdkp = scsi_disk_get(bdev->bd_disk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1195 | struct scsi_device *sdev; |
| 1196 | int retval; |
| 1197 | |
Al Viro | 0338e29 | 2008-03-02 10:41:04 -0500 | [diff] [blame] | 1198 | if (!sdkp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1199 | return -ENXIO; |
| 1200 | |
Martin K. Petersen | fa0d34b | 2007-02-27 22:41:19 -0500 | [diff] [blame] | 1201 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_open\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1202 | |
| 1203 | sdev = sdkp->device; |
| 1204 | |
| 1205 | /* |
| 1206 | * If the device is in error recovery, wait until it is done. |
| 1207 | * If the device is offline, then disallow any access to it. |
| 1208 | */ |
| 1209 | retval = -ENXIO; |
| 1210 | if (!scsi_block_when_processing_errors(sdev)) |
| 1211 | goto error_out; |
| 1212 | |
| 1213 | if (sdev->removable || sdkp->write_prot) |
Al Viro | 0338e29 | 2008-03-02 10:41:04 -0500 | [diff] [blame] | 1214 | check_disk_change(bdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1215 | |
| 1216 | /* |
| 1217 | * If the drive is empty, just let the open fail. |
| 1218 | */ |
| 1219 | retval = -ENOMEDIUM; |
Al Viro | 0338e29 | 2008-03-02 10:41:04 -0500 | [diff] [blame] | 1220 | if (sdev->removable && !sdkp->media_present && !(mode & FMODE_NDELAY)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1221 | goto error_out; |
| 1222 | |
| 1223 | /* |
| 1224 | * If the device has the write protect tab set, have the open fail |
| 1225 | * if the user expects to be able to write to the thing. |
| 1226 | */ |
| 1227 | retval = -EROFS; |
Al Viro | 0338e29 | 2008-03-02 10:41:04 -0500 | [diff] [blame] | 1228 | if (sdkp->write_prot && (mode & FMODE_WRITE)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1229 | goto error_out; |
| 1230 | |
| 1231 | /* |
| 1232 | * It is possible that the disk changing stuff resulted in |
| 1233 | * the device being taken offline. If this is the case, |
| 1234 | * report this to the user, and don't pretend that the |
| 1235 | * open actually succeeded. |
| 1236 | */ |
| 1237 | retval = -ENXIO; |
| 1238 | if (!scsi_device_online(sdev)) |
| 1239 | goto error_out; |
| 1240 | |
Arnd Bergmann | 409f349 | 2010-07-07 16:51:29 +0200 | [diff] [blame] | 1241 | if ((atomic_inc_return(&sdkp->openers) == 1) && sdev->removable) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1242 | if (scsi_block_when_processing_errors(sdev)) |
| 1243 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT); |
| 1244 | } |
| 1245 | |
| 1246 | return 0; |
| 1247 | |
| 1248 | error_out: |
| 1249 | scsi_disk_put(sdkp); |
| 1250 | return retval; |
| 1251 | } |
| 1252 | |
| 1253 | /** |
| 1254 | * sd_release - invoked when the (last) close(2) is called on this |
| 1255 | * scsi disk. |
| 1256 | * @inode: only i_rdev member may be used |
| 1257 | * @filp: only f_mode and f_flags may be used |
| 1258 | * |
| 1259 | * Returns 0. |
| 1260 | * |
| 1261 | * Note: may block (uninterruptible) if error recovery is underway |
| 1262 | * on this disk. |
Arnd Bergmann | 409f349 | 2010-07-07 16:51:29 +0200 | [diff] [blame] | 1263 | * |
| 1264 | * Locking: called with bdev->bd_mutex held. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1265 | **/ |
Al Viro | db2a144 | 2013-05-05 21:52:57 -0400 | [diff] [blame] | 1266 | static void sd_release(struct gendisk *disk, fmode_t mode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1267 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1268 | struct scsi_disk *sdkp = scsi_disk(disk); |
| 1269 | struct scsi_device *sdev = sdkp->device; |
| 1270 | |
James Bottomley | 56937f7 | 2007-03-11 12:25:33 -0500 | [diff] [blame] | 1271 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_release\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1272 | |
Alan Stern | 7e44331 | 2010-09-07 11:27:52 -0400 | [diff] [blame] | 1273 | if (atomic_dec_return(&sdkp->openers) == 0 && sdev->removable) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1274 | if (scsi_block_when_processing_errors(sdev)) |
| 1275 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW); |
| 1276 | } |
| 1277 | |
| 1278 | /* |
| 1279 | * XXX and what if there are packets in flight and this close() |
| 1280 | * XXX is followed by a "rmmod sd_mod"? |
| 1281 | */ |
Alan Stern | 478a8a0 | 2010-06-16 14:52:17 -0400 | [diff] [blame] | 1282 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1283 | scsi_disk_put(sdkp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1284 | } |
| 1285 | |
Christoph Hellwig | a885c8c | 2006-01-08 01:02:50 -0800 | [diff] [blame] | 1286 | static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1287 | { |
| 1288 | struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk); |
| 1289 | struct scsi_device *sdp = sdkp->device; |
| 1290 | struct Scsi_Host *host = sdp->host; |
Martin K. Petersen | f08bb1e | 2016-03-28 21:18:56 -0400 | [diff] [blame] | 1291 | sector_t capacity = logical_to_sectors(sdp, sdkp->capacity); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1292 | int diskinfo[4]; |
| 1293 | |
| 1294 | /* default to most commonly used values */ |
Martin K. Petersen | f08bb1e | 2016-03-28 21:18:56 -0400 | [diff] [blame] | 1295 | diskinfo[0] = 0x40; /* 1 << 6 */ |
| 1296 | diskinfo[1] = 0x20; /* 1 << 5 */ |
| 1297 | diskinfo[2] = capacity >> 11; |
| 1298 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1299 | /* override with calculated, extended default, or driver values */ |
| 1300 | if (host->hostt->bios_param) |
Martin K. Petersen | f08bb1e | 2016-03-28 21:18:56 -0400 | [diff] [blame] | 1301 | host->hostt->bios_param(sdp, bdev, capacity, diskinfo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1302 | else |
Martin K. Petersen | f08bb1e | 2016-03-28 21:18:56 -0400 | [diff] [blame] | 1303 | scsicam_bios_param(bdev, capacity, diskinfo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1304 | |
Christoph Hellwig | a885c8c | 2006-01-08 01:02:50 -0800 | [diff] [blame] | 1305 | geo->heads = diskinfo[0]; |
| 1306 | geo->sectors = diskinfo[1]; |
| 1307 | geo->cylinders = diskinfo[2]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1308 | return 0; |
| 1309 | } |
| 1310 | |
| 1311 | /** |
| 1312 | * sd_ioctl - process an ioctl |
| 1313 | * @inode: only i_rdev/i_bdev members may be used |
| 1314 | * @filp: only f_mode and f_flags may be used |
| 1315 | * @cmd: ioctl command number |
| 1316 | * @arg: this is third argument given to ioctl(2) system call. |
| 1317 | * Often contains a pointer. |
| 1318 | * |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 1319 | * Returns 0 if successful (some ioctls return positive numbers on |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1320 | * success as well). Returns a negated errno value in case of error. |
| 1321 | * |
| 1322 | * 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] | 1323 | * down in the scsi subsystem. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1324 | **/ |
Al Viro | 0338e29 | 2008-03-02 10:41:04 -0500 | [diff] [blame] | 1325 | static int sd_ioctl(struct block_device *bdev, fmode_t mode, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1326 | unsigned int cmd, unsigned long arg) |
| 1327 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1328 | struct gendisk *disk = bdev->bd_disk; |
Nao Nishijima | fe2d185 | 2011-08-25 18:04:14 +0900 | [diff] [blame] | 1329 | struct scsi_disk *sdkp = scsi_disk(disk); |
| 1330 | struct scsi_device *sdp = sdkp->device; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1331 | void __user *p = (void __user *)arg; |
| 1332 | int error; |
| 1333 | |
Nao Nishijima | fe2d185 | 2011-08-25 18:04:14 +0900 | [diff] [blame] | 1334 | SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO, sdkp, "sd_ioctl: disk=%s, " |
| 1335 | "cmd=0x%x\n", disk->disk_name, cmd)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1336 | |
Paolo Bonzini | 0bfc96c | 2012-01-12 16:01:28 +0100 | [diff] [blame] | 1337 | error = scsi_verify_blk_ioctl(bdev, cmd); |
| 1338 | if (error < 0) |
| 1339 | return error; |
| 1340 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1341 | /* |
| 1342 | * If we are in the middle of error recovery, don't let anyone |
| 1343 | * else try and use this device. Also, if error recovery fails, it |
| 1344 | * may try and take the device offline, in which case all further |
| 1345 | * access to the device is prohibited. |
| 1346 | */ |
Christoph Hellwig | 906d15f | 2014-10-11 16:25:31 +0200 | [diff] [blame] | 1347 | error = scsi_ioctl_block_when_processing_errors(sdp, cmd, |
| 1348 | (mode & FMODE_NDELAY) != 0); |
| 1349 | if (error) |
Arnd Bergmann | 8a6cfeb | 2010-07-08 10:18:46 +0200 | [diff] [blame] | 1350 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1351 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1352 | /* |
| 1353 | * Send SCSI addressing ioctls directly to mid level, send other |
| 1354 | * ioctls to block level and then onto mid level if they can't be |
| 1355 | * resolved. |
| 1356 | */ |
| 1357 | switch (cmd) { |
| 1358 | case SCSI_IOCTL_GET_IDLUN: |
| 1359 | case SCSI_IOCTL_GET_BUS_NUMBER: |
Arnd Bergmann | 8a6cfeb | 2010-07-08 10:18:46 +0200 | [diff] [blame] | 1360 | error = scsi_ioctl(sdp, cmd, p); |
| 1361 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1362 | default: |
Paolo Bonzini | 577ebb3 | 2012-01-12 16:01:27 +0100 | [diff] [blame] | 1363 | error = scsi_cmd_blk_ioctl(bdev, mode, cmd, p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1364 | if (error != -ENOTTY) |
Arnd Bergmann | 8a6cfeb | 2010-07-08 10:18:46 +0200 | [diff] [blame] | 1365 | break; |
| 1366 | error = scsi_ioctl(sdp, cmd, p); |
| 1367 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1368 | } |
Arnd Bergmann | 8a6cfeb | 2010-07-08 10:18:46 +0200 | [diff] [blame] | 1369 | out: |
Arnd Bergmann | 8a6cfeb | 2010-07-08 10:18:46 +0200 | [diff] [blame] | 1370 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1371 | } |
| 1372 | |
| 1373 | static void set_media_not_present(struct scsi_disk *sdkp) |
| 1374 | { |
Tejun Heo | 2bae009 | 2010-12-18 18:42:23 +0100 | [diff] [blame] | 1375 | if (sdkp->media_present) |
| 1376 | sdkp->device->changed = 1; |
| 1377 | |
| 1378 | if (sdkp->device->removable) { |
| 1379 | sdkp->media_present = 0; |
| 1380 | sdkp->capacity = 0; |
| 1381 | } |
| 1382 | } |
| 1383 | |
| 1384 | static int media_not_present(struct scsi_disk *sdkp, |
| 1385 | struct scsi_sense_hdr *sshdr) |
| 1386 | { |
| 1387 | if (!scsi_sense_valid(sshdr)) |
| 1388 | return 0; |
| 1389 | |
| 1390 | /* not invoked for commands that could return deferred errors */ |
| 1391 | switch (sshdr->sense_key) { |
| 1392 | case UNIT_ATTENTION: |
| 1393 | case NOT_READY: |
| 1394 | /* medium not present */ |
| 1395 | if (sshdr->asc == 0x3A) { |
| 1396 | set_media_not_present(sdkp); |
| 1397 | return 1; |
| 1398 | } |
| 1399 | } |
| 1400 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1401 | } |
| 1402 | |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 1403 | static int sd_sync_cache(struct scsi_disk *sdkp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1404 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1405 | int retries, res; |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 1406 | struct scsi_device *sdp = sdkp->device; |
James Bottomley | 7e66010 | 2013-10-04 21:42:24 +0000 | [diff] [blame] | 1407 | const int timeout = sdp->request_queue->rq_timeout |
| 1408 | * SD_FLUSH_TIMEOUT_MULTIPLIER; |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 1409 | struct scsi_sense_hdr sshdr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1410 | |
| 1411 | if (!scsi_device_online(sdp)) |
| 1412 | return -ENODEV; |
| 1413 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1414 | for (retries = 3; retries > 0; --retries) { |
| 1415 | unsigned char cmd[10] = { 0 }; |
| 1416 | |
| 1417 | cmd[0] = SYNCHRONIZE_CACHE; |
| 1418 | /* |
| 1419 | * Leave the rest of the command zero to indicate |
| 1420 | * flush everything. |
| 1421 | */ |
Lin Ming | 9b21493 | 2013-03-23 11:42:25 +0800 | [diff] [blame] | 1422 | res = scsi_execute_req_flags(sdp, cmd, DMA_NONE, NULL, 0, |
James Bottomley | 7e66010 | 2013-10-04 21:42:24 +0000 | [diff] [blame] | 1423 | &sshdr, timeout, SD_MAX_RETRIES, |
| 1424 | NULL, REQ_PM); |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 1425 | if (res == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1426 | break; |
| 1427 | } |
| 1428 | |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 1429 | if (res) { |
Hannes Reinecke | ef61329 | 2014-10-24 14:27:00 +0200 | [diff] [blame] | 1430 | sd_print_result(sdkp, "Synchronize Cache(10) failed", res); |
Oliver Neukum | 9589791 | 2013-09-16 13:28:15 +0200 | [diff] [blame] | 1431 | |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 1432 | if (driver_byte(res) & DRIVER_SENSE) |
| 1433 | sd_print_sense_hdr(sdkp, &sshdr); |
Oliver Neukum | 9589791 | 2013-09-16 13:28:15 +0200 | [diff] [blame] | 1434 | /* we need to evaluate the error return */ |
| 1435 | if (scsi_sense_valid(&sshdr) && |
Alan Stern | 7aae513 | 2014-01-15 15:37:04 -0500 | [diff] [blame] | 1436 | (sshdr.asc == 0x3a || /* medium not present */ |
| 1437 | sshdr.asc == 0x20)) /* invalid command */ |
Oliver Neukum | 9589791 | 2013-09-16 13:28:15 +0200 | [diff] [blame] | 1438 | /* this is no error here */ |
| 1439 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1440 | |
Oliver Neukum | 9589791 | 2013-09-16 13:28:15 +0200 | [diff] [blame] | 1441 | switch (host_byte(res)) { |
| 1442 | /* ignore errors due to racing a disconnection */ |
| 1443 | case DID_BAD_TARGET: |
| 1444 | case DID_NO_CONNECT: |
| 1445 | return 0; |
| 1446 | /* signal the upper layer it might try again */ |
| 1447 | case DID_BUS_BUSY: |
| 1448 | case DID_IMM_RETRY: |
| 1449 | case DID_REQUEUE: |
| 1450 | case DID_SOFT_ERROR: |
| 1451 | return -EBUSY; |
| 1452 | default: |
| 1453 | return -EIO; |
| 1454 | } |
| 1455 | } |
Tejun Heo | 3721050 | 2007-03-21 00:07:18 +0900 | [diff] [blame] | 1456 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1457 | } |
| 1458 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1459 | static void sd_rescan(struct device *dev) |
| 1460 | { |
Christoph Hellwig | 3d9a1f5 | 2015-02-02 14:01:25 +0100 | [diff] [blame] | 1461 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
Alan Stern | 39b7f1e | 2005-11-04 14:44:41 -0500 | [diff] [blame] | 1462 | |
Christoph Hellwig | 3d9a1f5 | 2015-02-02 14:01:25 +0100 | [diff] [blame] | 1463 | revalidate_disk(sdkp->disk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1464 | } |
| 1465 | |
| 1466 | |
| 1467 | #ifdef CONFIG_COMPAT |
| 1468 | /* |
| 1469 | * This gets directly called from VFS. When the ioctl |
| 1470 | * is not recognized we go back to the other translation paths. |
| 1471 | */ |
Al Viro | 0338e29 | 2008-03-02 10:41:04 -0500 | [diff] [blame] | 1472 | static int sd_compat_ioctl(struct block_device *bdev, fmode_t mode, |
| 1473 | unsigned int cmd, unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1474 | { |
Al Viro | 0338e29 | 2008-03-02 10:41:04 -0500 | [diff] [blame] | 1475 | struct scsi_device *sdev = scsi_disk(bdev->bd_disk)->device; |
Christoph Hellwig | 21a9d4c | 2014-10-24 18:39:37 +0200 | [diff] [blame] | 1476 | int error; |
Paolo Bonzini | 0bfc96c | 2012-01-12 16:01:28 +0100 | [diff] [blame] | 1477 | |
Christoph Hellwig | 21a9d4c | 2014-10-24 18:39:37 +0200 | [diff] [blame] | 1478 | error = scsi_ioctl_block_when_processing_errors(sdev, cmd, |
| 1479 | (mode & FMODE_NDELAY) != 0); |
| 1480 | if (error) |
| 1481 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1482 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1483 | /* |
| 1484 | * Let the static ioctl translation table take care of it. |
| 1485 | */ |
Christoph Hellwig | 21a9d4c | 2014-10-24 18:39:37 +0200 | [diff] [blame] | 1486 | if (!sdev->host->hostt->compat_ioctl) |
| 1487 | return -ENOIOCTLCMD; |
| 1488 | return sdev->host->hostt->compat_ioctl(sdev, cmd, (void __user *)arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1489 | } |
| 1490 | #endif |
| 1491 | |
Christoph Hellwig | 924d55b | 2015-10-15 14:10:49 +0200 | [diff] [blame] | 1492 | static char sd_pr_type(enum pr_type type) |
| 1493 | { |
| 1494 | switch (type) { |
| 1495 | case PR_WRITE_EXCLUSIVE: |
| 1496 | return 0x01; |
| 1497 | case PR_EXCLUSIVE_ACCESS: |
| 1498 | return 0x03; |
| 1499 | case PR_WRITE_EXCLUSIVE_REG_ONLY: |
| 1500 | return 0x05; |
| 1501 | case PR_EXCLUSIVE_ACCESS_REG_ONLY: |
| 1502 | return 0x06; |
| 1503 | case PR_WRITE_EXCLUSIVE_ALL_REGS: |
| 1504 | return 0x07; |
| 1505 | case PR_EXCLUSIVE_ACCESS_ALL_REGS: |
| 1506 | return 0x08; |
| 1507 | default: |
| 1508 | return 0; |
| 1509 | } |
| 1510 | }; |
| 1511 | |
| 1512 | static int sd_pr_command(struct block_device *bdev, u8 sa, |
| 1513 | u64 key, u64 sa_key, u8 type, u8 flags) |
| 1514 | { |
| 1515 | struct scsi_device *sdev = scsi_disk(bdev->bd_disk)->device; |
| 1516 | struct scsi_sense_hdr sshdr; |
| 1517 | int result; |
| 1518 | u8 cmd[16] = { 0, }; |
| 1519 | u8 data[24] = { 0, }; |
| 1520 | |
| 1521 | cmd[0] = PERSISTENT_RESERVE_OUT; |
| 1522 | cmd[1] = sa; |
| 1523 | cmd[2] = type; |
| 1524 | put_unaligned_be32(sizeof(data), &cmd[5]); |
| 1525 | |
| 1526 | put_unaligned_be64(key, &data[0]); |
| 1527 | put_unaligned_be64(sa_key, &data[8]); |
| 1528 | data[20] = flags; |
| 1529 | |
| 1530 | result = scsi_execute_req(sdev, cmd, DMA_TO_DEVICE, &data, sizeof(data), |
| 1531 | &sshdr, SD_TIMEOUT, SD_MAX_RETRIES, NULL); |
| 1532 | |
| 1533 | if ((driver_byte(result) & DRIVER_SENSE) && |
| 1534 | (scsi_sense_valid(&sshdr))) { |
| 1535 | sdev_printk(KERN_INFO, sdev, "PR command failed: %d\n", result); |
| 1536 | scsi_print_sense_hdr(sdev, NULL, &sshdr); |
| 1537 | } |
| 1538 | |
| 1539 | return result; |
| 1540 | } |
| 1541 | |
| 1542 | static int sd_pr_register(struct block_device *bdev, u64 old_key, u64 new_key, |
| 1543 | u32 flags) |
| 1544 | { |
| 1545 | if (flags & ~PR_FL_IGNORE_KEY) |
| 1546 | return -EOPNOTSUPP; |
| 1547 | return sd_pr_command(bdev, (flags & PR_FL_IGNORE_KEY) ? 0x06 : 0x00, |
| 1548 | old_key, new_key, 0, |
Christoph Hellwig | 01f90dd | 2016-07-08 21:23:50 +0900 | [diff] [blame] | 1549 | (1 << 0) /* APTPL */); |
Christoph Hellwig | 924d55b | 2015-10-15 14:10:49 +0200 | [diff] [blame] | 1550 | } |
| 1551 | |
| 1552 | static int sd_pr_reserve(struct block_device *bdev, u64 key, enum pr_type type, |
| 1553 | u32 flags) |
| 1554 | { |
| 1555 | if (flags) |
| 1556 | return -EOPNOTSUPP; |
| 1557 | return sd_pr_command(bdev, 0x01, key, 0, sd_pr_type(type), 0); |
| 1558 | } |
| 1559 | |
| 1560 | static int sd_pr_release(struct block_device *bdev, u64 key, enum pr_type type) |
| 1561 | { |
| 1562 | return sd_pr_command(bdev, 0x02, key, 0, sd_pr_type(type), 0); |
| 1563 | } |
| 1564 | |
| 1565 | static int sd_pr_preempt(struct block_device *bdev, u64 old_key, u64 new_key, |
| 1566 | enum pr_type type, bool abort) |
| 1567 | { |
| 1568 | return sd_pr_command(bdev, abort ? 0x05 : 0x04, old_key, new_key, |
| 1569 | sd_pr_type(type), 0); |
| 1570 | } |
| 1571 | |
| 1572 | static int sd_pr_clear(struct block_device *bdev, u64 key) |
| 1573 | { |
| 1574 | return sd_pr_command(bdev, 0x03, key, 0, 0, 0); |
| 1575 | } |
| 1576 | |
| 1577 | static const struct pr_ops sd_pr_ops = { |
| 1578 | .pr_register = sd_pr_register, |
| 1579 | .pr_reserve = sd_pr_reserve, |
| 1580 | .pr_release = sd_pr_release, |
| 1581 | .pr_preempt = sd_pr_preempt, |
| 1582 | .pr_clear = sd_pr_clear, |
| 1583 | }; |
| 1584 | |
Alexey Dobriyan | 83d5cde | 2009-09-21 17:01:13 -0700 | [diff] [blame] | 1585 | static const struct block_device_operations sd_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1586 | .owner = THIS_MODULE, |
Al Viro | 0338e29 | 2008-03-02 10:41:04 -0500 | [diff] [blame] | 1587 | .open = sd_open, |
| 1588 | .release = sd_release, |
Arnd Bergmann | 8a6cfeb | 2010-07-08 10:18:46 +0200 | [diff] [blame] | 1589 | .ioctl = sd_ioctl, |
Christoph Hellwig | a885c8c | 2006-01-08 01:02:50 -0800 | [diff] [blame] | 1590 | .getgeo = sd_getgeo, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1591 | #ifdef CONFIG_COMPAT |
Al Viro | 0338e29 | 2008-03-02 10:41:04 -0500 | [diff] [blame] | 1592 | .compat_ioctl = sd_compat_ioctl, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1593 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1594 | .revalidate_disk = sd_revalidate_disk, |
Tejun Heo | 72ec24b | 2010-05-15 20:09:32 +0200 | [diff] [blame] | 1595 | .unlock_native_capacity = sd_unlock_native_capacity, |
Christoph Hellwig | 924d55b | 2015-10-15 14:10:49 +0200 | [diff] [blame] | 1596 | .pr_ops = &sd_pr_ops, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1597 | }; |
| 1598 | |
Martin K. Petersen | 18a4d0a | 2012-02-09 13:48:53 -0500 | [diff] [blame] | 1599 | /** |
| 1600 | * sd_eh_action - error handling callback |
| 1601 | * @scmd: sd-issued command that has failed |
Martin K. Petersen | 18a4d0a | 2012-02-09 13:48:53 -0500 | [diff] [blame] | 1602 | * @eh_disp: The recovery disposition suggested by the midlayer |
| 1603 | * |
James Bottomley | 2451079 | 2013-11-11 13:44:53 +0100 | [diff] [blame] | 1604 | * This function is called by the SCSI midlayer upon completion of an |
| 1605 | * error test command (currently TEST UNIT READY). The result of sending |
| 1606 | * the eh command is passed in eh_disp. We're looking for devices that |
| 1607 | * fail medium access commands but are OK with non access commands like |
| 1608 | * test unit ready (so wrongly see the device as having a successful |
| 1609 | * recovery) |
Martin K. Petersen | 18a4d0a | 2012-02-09 13:48:53 -0500 | [diff] [blame] | 1610 | **/ |
James Bottomley | 2451079 | 2013-11-11 13:44:53 +0100 | [diff] [blame] | 1611 | 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] | 1612 | { |
| 1613 | struct scsi_disk *sdkp = scsi_disk(scmd->request->rq_disk); |
| 1614 | |
| 1615 | if (!scsi_device_online(scmd->device) || |
James Bottomley | 2451079 | 2013-11-11 13:44:53 +0100 | [diff] [blame] | 1616 | !scsi_medium_access_command(scmd) || |
| 1617 | host_byte(scmd->result) != DID_TIME_OUT || |
| 1618 | eh_disp != SUCCESS) |
Martin K. Petersen | 18a4d0a | 2012-02-09 13:48:53 -0500 | [diff] [blame] | 1619 | return eh_disp; |
| 1620 | |
| 1621 | /* |
| 1622 | * The device has timed out executing a medium access command. |
| 1623 | * However, the TEST UNIT READY command sent during error |
| 1624 | * handling completed successfully. Either the device is in the |
| 1625 | * process of recovering or has it suffered an internal failure |
| 1626 | * that prevents access to the storage medium. |
| 1627 | */ |
James Bottomley | 2451079 | 2013-11-11 13:44:53 +0100 | [diff] [blame] | 1628 | sdkp->medium_access_timed_out++; |
Martin K. Petersen | 18a4d0a | 2012-02-09 13:48:53 -0500 | [diff] [blame] | 1629 | |
| 1630 | /* |
| 1631 | * If the device keeps failing read/write commands but TEST UNIT |
| 1632 | * READY always completes successfully we assume that medium |
| 1633 | * access is no longer possible and take the device offline. |
| 1634 | */ |
| 1635 | if (sdkp->medium_access_timed_out >= sdkp->max_medium_access_timeouts) { |
| 1636 | scmd_printk(KERN_ERR, scmd, |
| 1637 | "Medium access timeout failure. Offlining disk!\n"); |
| 1638 | scsi_device_set_state(scmd->device, SDEV_OFFLINE); |
| 1639 | |
| 1640 | return FAILED; |
| 1641 | } |
| 1642 | |
| 1643 | return eh_disp; |
| 1644 | } |
| 1645 | |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 1646 | static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd) |
| 1647 | { |
Tejun Heo | 83096eb | 2009-05-07 22:24:39 +0900 | [diff] [blame] | 1648 | u64 start_lba = blk_rq_pos(scmd->request); |
| 1649 | u64 end_lba = blk_rq_pos(scmd->request) + (scsi_bufflen(scmd) / 512); |
Mark Hounschell | 74856fb | 2015-05-13 10:49:09 +0200 | [diff] [blame] | 1650 | u64 factor = scmd->device->sector_size / 512; |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 1651 | u64 bad_lba; |
| 1652 | int info_valid; |
James Bottomley | a8733c7 | 2010-12-17 15:36:34 -0500 | [diff] [blame] | 1653 | /* |
| 1654 | * resid is optional but mostly filled in. When it's unused, |
| 1655 | * its value is zero, so we assume the whole buffer transferred |
| 1656 | */ |
| 1657 | unsigned int transferred = scsi_bufflen(scmd) - scsi_get_resid(scmd); |
| 1658 | unsigned int good_bytes; |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 1659 | |
Christoph Hellwig | 33659eb | 2010-08-07 18:17:56 +0200 | [diff] [blame] | 1660 | if (scmd->request->cmd_type != REQ_TYPE_FS) |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 1661 | return 0; |
| 1662 | |
| 1663 | info_valid = scsi_get_sense_info_fld(scmd->sense_buffer, |
| 1664 | SCSI_SENSE_BUFFERSIZE, |
| 1665 | &bad_lba); |
| 1666 | if (!info_valid) |
| 1667 | return 0; |
| 1668 | |
| 1669 | if (scsi_bufflen(scmd) <= scmd->device->sector_size) |
| 1670 | return 0; |
| 1671 | |
Mark Hounschell | 74856fb | 2015-05-13 10:49:09 +0200 | [diff] [blame] | 1672 | /* be careful ... don't want any overflows */ |
| 1673 | do_div(start_lba, factor); |
| 1674 | do_div(end_lba, factor); |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 1675 | |
| 1676 | /* The bad lba was reported incorrectly, we have no idea where |
| 1677 | * the error is. |
| 1678 | */ |
| 1679 | if (bad_lba < start_lba || bad_lba >= end_lba) |
| 1680 | return 0; |
| 1681 | |
| 1682 | /* This computation should always be done in terms of |
| 1683 | * the resolution of the device's medium. |
| 1684 | */ |
James Bottomley | a8733c7 | 2010-12-17 15:36:34 -0500 | [diff] [blame] | 1685 | good_bytes = (bad_lba - start_lba) * scmd->device->sector_size; |
| 1686 | return min(good_bytes, transferred); |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 1687 | } |
| 1688 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1689 | /** |
Linus Torvalds | 7b3d954 | 2008-01-06 10:17:12 -0800 | [diff] [blame] | 1690 | * sd_done - bottom half handler: called when the lower level |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1691 | * driver has completed (successfully or otherwise) a scsi command. |
| 1692 | * @SCpnt: mid-level's per command structure. |
| 1693 | * |
| 1694 | * Note: potentially run from within an ISR. Must not block. |
| 1695 | **/ |
Linus Torvalds | 7b3d954 | 2008-01-06 10:17:12 -0800 | [diff] [blame] | 1696 | static int sd_done(struct scsi_cmnd *SCpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1697 | { |
| 1698 | int result = SCpnt->result; |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 1699 | unsigned int good_bytes = result ? 0 : scsi_bufflen(SCpnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1700 | struct scsi_sense_hdr sshdr; |
Martin K. Petersen | 4e7392e | 2009-09-20 16:49:38 -0400 | [diff] [blame] | 1701 | struct scsi_disk *sdkp = scsi_disk(SCpnt->request->rq_disk); |
Martin K. Petersen | 26e85fc | 2012-09-18 12:19:31 -0400 | [diff] [blame] | 1702 | struct request *req = SCpnt->request; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1703 | int sense_valid = 0; |
| 1704 | int sense_deferred = 0; |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 1705 | unsigned char op = SCpnt->cmnd[0]; |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 1706 | unsigned char unmap = SCpnt->cmnd[1] & 8; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1707 | |
Mike Christie | c2df40d | 2016-06-05 14:32:17 -0500 | [diff] [blame] | 1708 | if (req_op(req) == REQ_OP_DISCARD || req_op(req) == REQ_OP_WRITE_SAME) { |
Martin K. Petersen | 26e85fc | 2012-09-18 12:19:31 -0400 | [diff] [blame] | 1709 | if (!result) { |
| 1710 | good_bytes = blk_rq_bytes(req); |
| 1711 | scsi_set_resid(SCpnt, 0); |
| 1712 | } else { |
| 1713 | good_bytes = 0; |
| 1714 | scsi_set_resid(SCpnt, blk_rq_bytes(req)); |
| 1715 | } |
| 1716 | } |
FUJITA Tomonori | 6a32a8a | 2010-07-21 10:29:37 +0900 | [diff] [blame] | 1717 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1718 | if (result) { |
| 1719 | sense_valid = scsi_command_normalize_sense(SCpnt, &sshdr); |
| 1720 | if (sense_valid) |
| 1721 | sense_deferred = scsi_sense_is_deferred(&sshdr); |
| 1722 | } |
David Jeffery | 2a863ba | 2014-04-10 11:08:30 -0400 | [diff] [blame] | 1723 | sdkp->medium_access_timed_out = 0; |
| 1724 | |
Luben Tuikov | 03aba2f | 2006-06-23 09:39:09 -0700 | [diff] [blame] | 1725 | if (driver_byte(result) != DRIVER_SENSE && |
| 1726 | (!sense_valid || sense_deferred)) |
| 1727 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1728 | |
Luben Tuikov | 03aba2f | 2006-06-23 09:39:09 -0700 | [diff] [blame] | 1729 | switch (sshdr.sense_key) { |
| 1730 | case HARDWARE_ERROR: |
| 1731 | case MEDIUM_ERROR: |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 1732 | good_bytes = sd_completed_bytes(SCpnt); |
Luben Tuikov | 03aba2f | 2006-06-23 09:39:09 -0700 | [diff] [blame] | 1733 | break; |
| 1734 | case RECOVERED_ERROR: |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 1735 | good_bytes = scsi_bufflen(SCpnt); |
| 1736 | break; |
Jamie Wellnitz | 10dab22 | 2008-09-11 21:39:36 -0400 | [diff] [blame] | 1737 | case NO_SENSE: |
| 1738 | /* This indicates a false check condition, so ignore it. An |
| 1739 | * unknown amount of data was transferred so treat it as an |
| 1740 | * error. |
| 1741 | */ |
Jamie Wellnitz | 10dab22 | 2008-09-11 21:39:36 -0400 | [diff] [blame] | 1742 | SCpnt->result = 0; |
| 1743 | memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); |
| 1744 | break; |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 1745 | case ABORTED_COMMAND: |
| 1746 | if (sshdr.asc == 0x10) /* DIF: Target detected corruption */ |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 1747 | good_bytes = sd_completed_bytes(SCpnt); |
Luben Tuikov | 03aba2f | 2006-06-23 09:39:09 -0700 | [diff] [blame] | 1748 | break; |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 1749 | case ILLEGAL_REQUEST: |
| 1750 | if (sshdr.asc == 0x10) /* DIX: Host detected corruption */ |
| 1751 | good_bytes = sd_completed_bytes(SCpnt); |
| 1752 | /* INVALID COMMAND OPCODE or INVALID FIELD IN CDB */ |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 1753 | if (sshdr.asc == 0x20 || sshdr.asc == 0x24) { |
| 1754 | switch (op) { |
| 1755 | case UNMAP: |
| 1756 | sd_config_discard(sdkp, SD_LBP_DISABLE); |
| 1757 | break; |
| 1758 | case WRITE_SAME_16: |
| 1759 | case WRITE_SAME: |
| 1760 | if (unmap) |
| 1761 | sd_config_discard(sdkp, SD_LBP_DISABLE); |
| 1762 | else { |
| 1763 | sdkp->device->no_write_same = 1; |
| 1764 | sd_config_write_same(sdkp); |
| 1765 | |
| 1766 | good_bytes = 0; |
| 1767 | req->__data_len = blk_rq_bytes(req); |
| 1768 | req->cmd_flags |= REQ_QUIET; |
| 1769 | } |
| 1770 | } |
| 1771 | } |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 1772 | break; |
Luben Tuikov | 03aba2f | 2006-06-23 09:39:09 -0700 | [diff] [blame] | 1773 | default: |
| 1774 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1775 | } |
Luben Tuikov | 03aba2f | 2006-06-23 09:39:09 -0700 | [diff] [blame] | 1776 | out: |
Hannes Reinecke | ef61329 | 2014-10-24 14:27:00 +0200 | [diff] [blame] | 1777 | SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO, SCpnt, |
| 1778 | "sd_done: completed %d of %d bytes\n", |
| 1779 | good_bytes, scsi_bufflen(SCpnt))); |
| 1780 | |
Martin K. Petersen | af55ff6 | 2008-07-17 04:28:35 -0400 | [diff] [blame] | 1781 | if (rq_data_dir(SCpnt->request) == READ && scsi_prot_sg_count(SCpnt)) |
| 1782 | sd_dif_complete(SCpnt, good_bytes); |
| 1783 | |
Linus Torvalds | 7b3d954 | 2008-01-06 10:17:12 -0800 | [diff] [blame] | 1784 | return good_bytes; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1785 | } |
| 1786 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1787 | /* |
| 1788 | * spinup disk - called only in sd_revalidate_disk() |
| 1789 | */ |
| 1790 | static void |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 1791 | sd_spinup_disk(struct scsi_disk *sdkp) |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 1792 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1793 | unsigned char cmd[10]; |
Alan Stern | 4451e47 | 2005-07-12 10:45:17 -0400 | [diff] [blame] | 1794 | unsigned long spintime_expire = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1795 | int retries, spintime; |
| 1796 | unsigned int the_result; |
| 1797 | struct scsi_sense_hdr sshdr; |
| 1798 | int sense_valid = 0; |
| 1799 | |
| 1800 | spintime = 0; |
| 1801 | |
| 1802 | /* Spin up drives, as required. Only do this at boot time */ |
| 1803 | /* Spinup needs to be done for module loads too. */ |
| 1804 | do { |
| 1805 | retries = 0; |
| 1806 | |
| 1807 | do { |
| 1808 | cmd[0] = TEST_UNIT_READY; |
| 1809 | memset((void *) &cmd[1], 0, 9); |
| 1810 | |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 1811 | the_result = scsi_execute_req(sdkp->device, cmd, |
| 1812 | DMA_NONE, NULL, 0, |
| 1813 | &sshdr, SD_TIMEOUT, |
FUJITA Tomonori | f4f4e47 | 2008-12-04 14:24:39 +0900 | [diff] [blame] | 1814 | SD_MAX_RETRIES, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1815 | |
Alan Stern | b4d38e3 | 2006-10-11 16:48:28 -0400 | [diff] [blame] | 1816 | /* |
| 1817 | * If the drive has indicated to us that it |
| 1818 | * doesn't have any media in it, don't bother |
| 1819 | * with any more polling. |
| 1820 | */ |
| 1821 | if (media_not_present(sdkp, &sshdr)) |
| 1822 | return; |
| 1823 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1824 | if (the_result) |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 1825 | sense_valid = scsi_sense_valid(&sshdr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1826 | retries++; |
| 1827 | } while (retries < 3 && |
| 1828 | (!scsi_status_is_good(the_result) || |
| 1829 | ((driver_byte(the_result) & DRIVER_SENSE) && |
| 1830 | sense_valid && sshdr.sense_key == UNIT_ATTENTION))); |
| 1831 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1832 | if ((driver_byte(the_result) & DRIVER_SENSE) == 0) { |
| 1833 | /* no sense, TUR either succeeded or failed |
| 1834 | * with a status error */ |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 1835 | if(!spintime && !scsi_status_is_good(the_result)) { |
Hannes Reinecke | ef61329 | 2014-10-24 14:27:00 +0200 | [diff] [blame] | 1836 | sd_print_result(sdkp, "Test Unit Ready failed", |
| 1837 | the_result); |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 1838 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1839 | break; |
| 1840 | } |
Hannes Reinecke | ef61329 | 2014-10-24 14:27:00 +0200 | [diff] [blame] | 1841 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1842 | /* |
| 1843 | * The device does not want the automatic start to be issued. |
| 1844 | */ |
Matthew Wilcox | 33dd6f9 | 2009-02-20 06:53:48 -0700 | [diff] [blame] | 1845 | if (sdkp->device->no_start_on_add) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1846 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1847 | |
Matthew Wilcox | 33dd6f9 | 2009-02-20 06:53:48 -0700 | [diff] [blame] | 1848 | if (sense_valid && sshdr.sense_key == NOT_READY) { |
| 1849 | if (sshdr.asc == 4 && sshdr.ascq == 3) |
| 1850 | break; /* manual intervention required */ |
| 1851 | if (sshdr.asc == 4 && sshdr.ascq == 0xb) |
| 1852 | break; /* standby */ |
| 1853 | if (sshdr.asc == 4 && sshdr.ascq == 0xc) |
| 1854 | break; /* unavailable */ |
| 1855 | /* |
| 1856 | * Issue command to spin up drive when not ready |
| 1857 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1858 | if (!spintime) { |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 1859 | sd_printk(KERN_NOTICE, sdkp, "Spinning up disk..."); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1860 | cmd[0] = START_STOP; |
| 1861 | cmd[1] = 1; /* Return immediately */ |
| 1862 | memset((void *) &cmd[2], 0, 8); |
| 1863 | cmd[4] = 1; /* Start spin cycle */ |
Stefan Richter | d2886ea | 2008-05-11 00:34:07 +0200 | [diff] [blame] | 1864 | if (sdkp->device->start_stop_pwr_cond) |
| 1865 | cmd[4] |= 1 << 4; |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 1866 | scsi_execute_req(sdkp->device, cmd, DMA_NONE, |
| 1867 | NULL, 0, &sshdr, |
FUJITA Tomonori | f4f4e47 | 2008-12-04 14:24:39 +0900 | [diff] [blame] | 1868 | SD_TIMEOUT, SD_MAX_RETRIES, |
| 1869 | NULL); |
Alan Stern | 4451e47 | 2005-07-12 10:45:17 -0400 | [diff] [blame] | 1870 | spintime_expire = jiffies + 100 * HZ; |
| 1871 | spintime = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1872 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1873 | /* Wait 1 second for next try */ |
| 1874 | msleep(1000); |
| 1875 | printk("."); |
Alan Stern | 4451e47 | 2005-07-12 10:45:17 -0400 | [diff] [blame] | 1876 | |
| 1877 | /* |
| 1878 | * Wait for USB flash devices with slow firmware. |
| 1879 | * Yes, this sense key/ASC combination shouldn't |
| 1880 | * occur here. It's characteristic of these devices. |
| 1881 | */ |
| 1882 | } else if (sense_valid && |
| 1883 | sshdr.sense_key == UNIT_ATTENTION && |
| 1884 | sshdr.asc == 0x28) { |
| 1885 | if (!spintime) { |
| 1886 | spintime_expire = jiffies + 5 * HZ; |
| 1887 | spintime = 1; |
| 1888 | } |
| 1889 | /* Wait 1 second for next try */ |
| 1890 | msleep(1000); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1891 | } else { |
| 1892 | /* we don't understand the sense code, so it's |
| 1893 | * probably pointless to loop */ |
| 1894 | if(!spintime) { |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 1895 | sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n"); |
| 1896 | sd_print_sense_hdr(sdkp, &sshdr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1897 | } |
| 1898 | break; |
| 1899 | } |
| 1900 | |
Alan Stern | 4451e47 | 2005-07-12 10:45:17 -0400 | [diff] [blame] | 1901 | } while (spintime && time_before_eq(jiffies, spintime_expire)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1902 | |
| 1903 | if (spintime) { |
| 1904 | if (scsi_status_is_good(the_result)) |
| 1905 | printk("ready\n"); |
| 1906 | else |
| 1907 | printk("not responding...\n"); |
| 1908 | } |
| 1909 | } |
| 1910 | |
Martin K. Petersen | e0597d7 | 2008-07-17 04:28:34 -0400 | [diff] [blame] | 1911 | |
| 1912 | /* |
| 1913 | * Determine whether disk supports Data Integrity Field. |
| 1914 | */ |
Martin K. Petersen | fe54239 | 2012-09-21 12:44:12 -0400 | [diff] [blame] | 1915 | 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] | 1916 | { |
| 1917 | struct scsi_device *sdp = sdkp->device; |
| 1918 | u8 type; |
Martin K. Petersen | fe54239 | 2012-09-21 12:44:12 -0400 | [diff] [blame] | 1919 | int ret = 0; |
Martin K. Petersen | e0597d7 | 2008-07-17 04:28:34 -0400 | [diff] [blame] | 1920 | |
| 1921 | if (scsi_device_protection(sdp) == 0 || (buffer[12] & 1) == 0) |
Martin K. Petersen | fe54239 | 2012-09-21 12:44:12 -0400 | [diff] [blame] | 1922 | return ret; |
Martin K. Petersen | 35e1a5d | 2009-09-18 17:33:00 -0400 | [diff] [blame] | 1923 | |
| 1924 | type = ((buffer[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */ |
| 1925 | |
Christoph Hellwig | 8475c81 | 2016-09-11 19:35:41 +0200 | [diff] [blame] | 1926 | if (type > T10_PI_TYPE3_PROTECTION) |
Martin K. Petersen | fe54239 | 2012-09-21 12:44:12 -0400 | [diff] [blame] | 1927 | ret = -ENODEV; |
| 1928 | else if (scsi_host_dif_capable(sdp->host, type)) |
| 1929 | ret = 1; |
| 1930 | |
| 1931 | if (sdkp->first_scan || type != sdkp->protection_type) |
| 1932 | switch (ret) { |
| 1933 | case -ENODEV: |
| 1934 | sd_printk(KERN_ERR, sdkp, "formatted with unsupported" \ |
| 1935 | " protection type %u. Disabling disk!\n", |
| 1936 | type); |
| 1937 | break; |
| 1938 | case 1: |
| 1939 | sd_printk(KERN_NOTICE, sdkp, |
| 1940 | "Enabling DIF Type %u protection\n", type); |
| 1941 | break; |
| 1942 | case 0: |
| 1943 | sd_printk(KERN_NOTICE, sdkp, |
| 1944 | "Disabling DIF Type %u protection\n", type); |
| 1945 | break; |
| 1946 | } |
Martin K. Petersen | e0597d7 | 2008-07-17 04:28:34 -0400 | [diff] [blame] | 1947 | |
Martin K. Petersen | be922f4 | 2008-09-19 18:47:20 -0400 | [diff] [blame] | 1948 | sdkp->protection_type = type; |
| 1949 | |
Martin K. Petersen | fe54239 | 2012-09-21 12:44:12 -0400 | [diff] [blame] | 1950 | return ret; |
Martin K. Petersen | e0597d7 | 2008-07-17 04:28:34 -0400 | [diff] [blame] | 1951 | } |
| 1952 | |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 1953 | static void read_capacity_error(struct scsi_disk *sdkp, struct scsi_device *sdp, |
| 1954 | struct scsi_sense_hdr *sshdr, int sense_valid, |
| 1955 | int the_result) |
| 1956 | { |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 1957 | if (driver_byte(the_result) & DRIVER_SENSE) |
| 1958 | sd_print_sense_hdr(sdkp, sshdr); |
| 1959 | else |
| 1960 | sd_printk(KERN_NOTICE, sdkp, "Sense not available.\n"); |
| 1961 | |
| 1962 | /* |
| 1963 | * Set dirty bit for removable devices if not ready - |
| 1964 | * sometimes drives will not report this properly. |
| 1965 | */ |
| 1966 | if (sdp->removable && |
| 1967 | sense_valid && sshdr->sense_key == NOT_READY) |
Tejun Heo | 2bae009 | 2010-12-18 18:42:23 +0100 | [diff] [blame] | 1968 | set_media_not_present(sdkp); |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 1969 | |
| 1970 | /* |
| 1971 | * We used to set media_present to 0 here to indicate no media |
| 1972 | * in the drive, but some drives fail read capacity even with |
| 1973 | * media present, so we can't do that. |
| 1974 | */ |
| 1975 | sdkp->capacity = 0; /* unknown mapped to zero - as usual */ |
| 1976 | } |
| 1977 | |
| 1978 | #define RC16_LEN 32 |
| 1979 | #if RC16_LEN > SD_BUF_SIZE |
| 1980 | #error RC16_LEN must not be more than SD_BUF_SIZE |
| 1981 | #endif |
| 1982 | |
James Bottomley | 3233ac1 | 2010-04-01 10:30:01 -0400 | [diff] [blame] | 1983 | #define READ_CAPACITY_RETRIES_ON_RESET 10 |
| 1984 | |
Martin K. Petersen | 08383b0 | 2017-04-04 10:42:30 -0400 | [diff] [blame] | 1985 | /* |
| 1986 | * Ensure that we don't overflow sector_t when CONFIG_LBDAF is not set |
| 1987 | * and the reported logical block size is bigger than 512 bytes. Note |
| 1988 | * that last_sector is a u64 and therefore logical_to_sectors() is not |
| 1989 | * applicable. |
| 1990 | */ |
| 1991 | static bool sd_addressable_capacity(u64 lba, unsigned int sector_size) |
| 1992 | { |
| 1993 | u64 last_sector = (lba + 1ULL) << (ilog2(sector_size) - 9); |
| 1994 | |
| 1995 | if (sizeof(sector_t) == 4 && last_sector > U32_MAX) |
| 1996 | return false; |
| 1997 | |
| 1998 | return true; |
| 1999 | } |
| 2000 | |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2001 | static int read_capacity_16(struct scsi_disk *sdkp, struct scsi_device *sdp, |
| 2002 | unsigned char *buffer) |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 2003 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2004 | unsigned char cmd[16]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2005 | struct scsi_sense_hdr sshdr; |
| 2006 | int sense_valid = 0; |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2007 | int the_result; |
James Bottomley | 3233ac1 | 2010-04-01 10:30:01 -0400 | [diff] [blame] | 2008 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
Martin K. Petersen | ea09bcc | 2009-05-23 11:43:37 -0400 | [diff] [blame] | 2009 | unsigned int alignment; |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2010 | unsigned long long lba; |
| 2011 | unsigned sector_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2012 | |
Hans de Goede | 5ce524b | 2010-10-01 14:20:10 -0700 | [diff] [blame] | 2013 | if (sdp->no_read_capacity_16) |
| 2014 | return -EINVAL; |
| 2015 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2016 | do { |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2017 | memset(cmd, 0, 16); |
Hannes Reinecke | eb846d9 | 2014-11-17 14:25:19 +0100 | [diff] [blame] | 2018 | cmd[0] = SERVICE_ACTION_IN_16; |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2019 | cmd[1] = SAI_READ_CAPACITY_16; |
| 2020 | cmd[13] = RC16_LEN; |
| 2021 | memset(buffer, 0, RC16_LEN); |
| 2022 | |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 2023 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2024 | buffer, RC16_LEN, &sshdr, |
| 2025 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2026 | |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 2027 | if (media_not_present(sdkp, &sshdr)) |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2028 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2029 | |
Matthew Wilcox | 2b30130 | 2009-03-12 14:20:30 -0400 | [diff] [blame] | 2030 | if (the_result) { |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 2031 | sense_valid = scsi_sense_valid(&sshdr); |
Matthew Wilcox | 2b30130 | 2009-03-12 14:20:30 -0400 | [diff] [blame] | 2032 | if (sense_valid && |
| 2033 | sshdr.sense_key == ILLEGAL_REQUEST && |
| 2034 | (sshdr.asc == 0x20 || sshdr.asc == 0x24) && |
| 2035 | sshdr.ascq == 0x00) |
| 2036 | /* Invalid Command Operation Code or |
| 2037 | * Invalid Field in CDB, just retry |
| 2038 | * silently with RC10 */ |
| 2039 | return -EINVAL; |
James Bottomley | 3233ac1 | 2010-04-01 10:30:01 -0400 | [diff] [blame] | 2040 | if (sense_valid && |
| 2041 | sshdr.sense_key == UNIT_ATTENTION && |
| 2042 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) |
| 2043 | /* Device reset might occur several times, |
| 2044 | * give it one more chance */ |
| 2045 | if (--reset_retries > 0) |
| 2046 | continue; |
Matthew Wilcox | 2b30130 | 2009-03-12 14:20:30 -0400 | [diff] [blame] | 2047 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2048 | retries--; |
| 2049 | |
| 2050 | } while (the_result && retries); |
| 2051 | |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2052 | if (the_result) { |
Hannes Reinecke | ef61329 | 2014-10-24 14:27:00 +0200 | [diff] [blame] | 2053 | sd_print_result(sdkp, "Read Capacity(16) failed", the_result); |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2054 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); |
| 2055 | return -EINVAL; |
| 2056 | } |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 2057 | |
Dave Hansen | 8f76d15 | 2009-04-21 16:43:27 -0700 | [diff] [blame] | 2058 | sector_size = get_unaligned_be32(&buffer[8]); |
| 2059 | lba = get_unaligned_be64(&buffer[0]); |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2060 | |
Martin K. Petersen | fe54239 | 2012-09-21 12:44:12 -0400 | [diff] [blame] | 2061 | if (sd_read_protection_type(sdkp, buffer) < 0) { |
| 2062 | sdkp->capacity = 0; |
| 2063 | return -ENODEV; |
| 2064 | } |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2065 | |
Martin K. Petersen | 08383b0 | 2017-04-04 10:42:30 -0400 | [diff] [blame] | 2066 | if (!sd_addressable_capacity(lba, sector_size)) { |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2067 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a " |
| 2068 | "kernel compiled with support for large block " |
| 2069 | "devices.\n"); |
| 2070 | sdkp->capacity = 0; |
| 2071 | return -EOVERFLOW; |
| 2072 | } |
| 2073 | |
Martin K. Petersen | ea09bcc | 2009-05-23 11:43:37 -0400 | [diff] [blame] | 2074 | /* Logical blocks per physical block exponent */ |
Martin K. Petersen | 526f7c7 | 2010-09-28 14:48:47 -0400 | [diff] [blame] | 2075 | sdkp->physical_block_size = (1 << (buffer[13] & 0xf)) * sector_size; |
Martin K. Petersen | ea09bcc | 2009-05-23 11:43:37 -0400 | [diff] [blame] | 2076 | |
| 2077 | /* Lowest aligned logical block */ |
| 2078 | alignment = ((buffer[14] & 0x3f) << 8 | buffer[15]) * sector_size; |
| 2079 | blk_queue_alignment_offset(sdp->request_queue, alignment); |
| 2080 | if (alignment && sdkp->first_scan) |
| 2081 | sd_printk(KERN_NOTICE, sdkp, |
| 2082 | "physical block alignment offset: %u\n", alignment); |
| 2083 | |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 2084 | if (buffer[14] & 0x80) { /* LBPME */ |
| 2085 | sdkp->lbpme = 1; |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 2086 | |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 2087 | if (buffer[14] & 0x40) /* LBPRZ */ |
| 2088 | sdkp->lbprz = 1; |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 2089 | |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 2090 | sd_config_discard(sdkp, SD_LBP_WS16); |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 2091 | } |
| 2092 | |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2093 | sdkp->capacity = lba + 1; |
| 2094 | return sector_size; |
| 2095 | } |
| 2096 | |
| 2097 | static int read_capacity_10(struct scsi_disk *sdkp, struct scsi_device *sdp, |
| 2098 | unsigned char *buffer) |
| 2099 | { |
| 2100 | unsigned char cmd[16]; |
| 2101 | struct scsi_sense_hdr sshdr; |
| 2102 | int sense_valid = 0; |
| 2103 | int the_result; |
James Bottomley | 3233ac1 | 2010-04-01 10:30:01 -0400 | [diff] [blame] | 2104 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2105 | sector_t lba; |
| 2106 | unsigned sector_size; |
| 2107 | |
| 2108 | do { |
| 2109 | cmd[0] = READ_CAPACITY; |
| 2110 | memset(&cmd[1], 0, 9); |
| 2111 | memset(buffer, 0, 8); |
| 2112 | |
| 2113 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, |
| 2114 | buffer, 8, &sshdr, |
| 2115 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); |
| 2116 | |
| 2117 | if (media_not_present(sdkp, &sshdr)) |
| 2118 | return -ENODEV; |
| 2119 | |
James Bottomley | 3233ac1 | 2010-04-01 10:30:01 -0400 | [diff] [blame] | 2120 | if (the_result) { |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2121 | sense_valid = scsi_sense_valid(&sshdr); |
James Bottomley | 3233ac1 | 2010-04-01 10:30:01 -0400 | [diff] [blame] | 2122 | if (sense_valid && |
| 2123 | sshdr.sense_key == UNIT_ATTENTION && |
| 2124 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) |
| 2125 | /* Device reset might occur several times, |
| 2126 | * give it one more chance */ |
| 2127 | if (--reset_retries > 0) |
| 2128 | continue; |
| 2129 | } |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2130 | retries--; |
| 2131 | |
| 2132 | } while (the_result && retries); |
| 2133 | |
| 2134 | if (the_result) { |
Hannes Reinecke | ef61329 | 2014-10-24 14:27:00 +0200 | [diff] [blame] | 2135 | sd_print_result(sdkp, "Read Capacity(10) failed", the_result); |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2136 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); |
| 2137 | return -EINVAL; |
| 2138 | } |
| 2139 | |
Dave Hansen | 8f76d15 | 2009-04-21 16:43:27 -0700 | [diff] [blame] | 2140 | sector_size = get_unaligned_be32(&buffer[4]); |
| 2141 | lba = get_unaligned_be32(&buffer[0]); |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2142 | |
Hans de Goede | 5ce524b | 2010-10-01 14:20:10 -0700 | [diff] [blame] | 2143 | if (sdp->no_read_capacity_16 && (lba == 0xffffffff)) { |
| 2144 | /* Some buggy (usb cardreader) devices return an lba of |
| 2145 | 0xffffffff when the want to report a size of 0 (with |
| 2146 | which they really mean no media is present) */ |
| 2147 | sdkp->capacity = 0; |
Linus Torvalds | 5cc1035 | 2010-10-22 20:30:48 -0700 | [diff] [blame] | 2148 | sdkp->physical_block_size = sector_size; |
Hans de Goede | 5ce524b | 2010-10-01 14:20:10 -0700 | [diff] [blame] | 2149 | return sector_size; |
| 2150 | } |
| 2151 | |
Martin K. Petersen | 08383b0 | 2017-04-04 10:42:30 -0400 | [diff] [blame] | 2152 | if (!sd_addressable_capacity(lba, sector_size)) { |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2153 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a " |
| 2154 | "kernel compiled with support for large block " |
| 2155 | "devices.\n"); |
| 2156 | sdkp->capacity = 0; |
| 2157 | return -EOVERFLOW; |
| 2158 | } |
| 2159 | |
| 2160 | sdkp->capacity = lba + 1; |
Martin K. Petersen | 526f7c7 | 2010-09-28 14:48:47 -0400 | [diff] [blame] | 2161 | sdkp->physical_block_size = sector_size; |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2162 | return sector_size; |
| 2163 | } |
| 2164 | |
Matthew Wilcox | 2b30130 | 2009-03-12 14:20:30 -0400 | [diff] [blame] | 2165 | static int sd_try_rc16_first(struct scsi_device *sdp) |
| 2166 | { |
Hannes Reinecke | f87146b | 2010-03-29 09:29:24 +0200 | [diff] [blame] | 2167 | if (sdp->host->max_cmd_len < 16) |
| 2168 | return 0; |
Alan Stern | 6a0bdff | 2012-06-20 16:04:19 -0400 | [diff] [blame] | 2169 | if (sdp->try_rc_10_first) |
| 2170 | return 0; |
Matthew Wilcox | 2b30130 | 2009-03-12 14:20:30 -0400 | [diff] [blame] | 2171 | if (sdp->scsi_level > SCSI_SPC_2) |
| 2172 | return 1; |
| 2173 | if (scsi_device_protection(sdp)) |
| 2174 | return 1; |
| 2175 | return 0; |
| 2176 | } |
| 2177 | |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2178 | /* |
| 2179 | * read disk capacity |
| 2180 | */ |
| 2181 | static void |
| 2182 | sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer) |
| 2183 | { |
| 2184 | int sector_size; |
| 2185 | struct scsi_device *sdp = sdkp->device; |
Martin K. Petersen | 70a9b87 | 2009-03-09 11:33:31 -0400 | [diff] [blame] | 2186 | sector_t old_capacity = sdkp->capacity; |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2187 | |
Matthew Wilcox | 2b30130 | 2009-03-12 14:20:30 -0400 | [diff] [blame] | 2188 | if (sd_try_rc16_first(sdp)) { |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2189 | sector_size = read_capacity_16(sdkp, sdp, buffer); |
| 2190 | if (sector_size == -EOVERFLOW) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2191 | goto got_data; |
Matthew Wilcox | 2b30130 | 2009-03-12 14:20:30 -0400 | [diff] [blame] | 2192 | if (sector_size == -ENODEV) |
| 2193 | return; |
| 2194 | if (sector_size < 0) |
| 2195 | sector_size = read_capacity_10(sdkp, sdp, buffer); |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2196 | if (sector_size < 0) |
| 2197 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2198 | } else { |
Matthew Wilcox | 0da205e | 2009-03-12 14:20:29 -0400 | [diff] [blame] | 2199 | sector_size = read_capacity_10(sdkp, sdp, buffer); |
| 2200 | if (sector_size == -EOVERFLOW) |
| 2201 | goto got_data; |
| 2202 | if (sector_size < 0) |
| 2203 | return; |
| 2204 | if ((sizeof(sdkp->capacity) > 4) && |
| 2205 | (sdkp->capacity > 0xffffffffULL)) { |
| 2206 | int old_sector_size = sector_size; |
| 2207 | sd_printk(KERN_NOTICE, sdkp, "Very big device. " |
| 2208 | "Trying to use READ CAPACITY(16).\n"); |
| 2209 | sector_size = read_capacity_16(sdkp, sdp, buffer); |
| 2210 | if (sector_size < 0) { |
| 2211 | sd_printk(KERN_NOTICE, sdkp, |
| 2212 | "Using 0xffffffff as device size\n"); |
| 2213 | sdkp->capacity = 1 + (sector_t) 0xffffffff; |
| 2214 | sector_size = old_sector_size; |
| 2215 | goto got_data; |
| 2216 | } |
| 2217 | } |
| 2218 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2219 | |
Alan Stern | 5c211ca | 2009-02-18 10:54:44 -0500 | [diff] [blame] | 2220 | /* Some devices are known to return the total number of blocks, |
| 2221 | * not the highest block number. Some devices have versions |
| 2222 | * which do this and others which do not. Some devices we might |
| 2223 | * suspect of doing this but we don't know for certain. |
| 2224 | * |
| 2225 | * If we know the reported capacity is wrong, decrement it. If |
| 2226 | * we can only guess, then assume the number of blocks is even |
| 2227 | * (usually true but not always) and err on the side of lowering |
| 2228 | * the capacity. |
| 2229 | */ |
| 2230 | if (sdp->fix_capacity || |
| 2231 | (sdp->guess_capacity && (sdkp->capacity & 0x01))) { |
| 2232 | sd_printk(KERN_INFO, sdkp, "Adjusting the sector count " |
| 2233 | "from its reported value: %llu\n", |
| 2234 | (unsigned long long) sdkp->capacity); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2235 | --sdkp->capacity; |
Oliver Neukum | 61bf54b | 2007-02-08 09:04:48 +0100 | [diff] [blame] | 2236 | } |
| 2237 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2238 | got_data: |
| 2239 | if (sector_size == 0) { |
| 2240 | sector_size = 512; |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 2241 | sd_printk(KERN_NOTICE, sdkp, "Sector size 0 reported, " |
| 2242 | "assuming 512.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2243 | } |
| 2244 | |
| 2245 | if (sector_size != 512 && |
| 2246 | sector_size != 1024 && |
| 2247 | sector_size != 2048 && |
Mark Hounschell | 74856fb | 2015-05-13 10:49:09 +0200 | [diff] [blame] | 2248 | sector_size != 4096) { |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 2249 | sd_printk(KERN_NOTICE, sdkp, "Unsupported sector size %d.\n", |
| 2250 | sector_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2251 | /* |
| 2252 | * The user might want to re-format the drive with |
| 2253 | * a supported sectorsize. Once this happens, it |
| 2254 | * would be relatively trivial to set the thing up. |
| 2255 | * For this reason, we leave the thing in the table. |
| 2256 | */ |
| 2257 | sdkp->capacity = 0; |
| 2258 | /* |
| 2259 | * set a bogus sector size so the normal read/write |
| 2260 | * logic in the block layer will eventually refuse any |
| 2261 | * request on this device without tripping over power |
| 2262 | * of two sector size assumptions |
| 2263 | */ |
| 2264 | sector_size = 512; |
| 2265 | } |
Martin K. Petersen | e1defc4 | 2009-05-22 17:17:49 -0400 | [diff] [blame] | 2266 | blk_queue_logical_block_size(sdp->request_queue, sector_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2267 | |
James Bottomley | 7404ad3b | 2008-08-31 10:41:52 -0500 | [diff] [blame] | 2268 | { |
| 2269 | char cap_str_2[10], cap_str_10[10]; |
James Bottomley | 7404ad3b | 2008-08-31 10:41:52 -0500 | [diff] [blame] | 2270 | |
James Bottomley | b9f28d8 | 2015-03-05 18:47:01 -0800 | [diff] [blame] | 2271 | string_get_size(sdkp->capacity, sector_size, |
| 2272 | STRING_UNITS_2, cap_str_2, sizeof(cap_str_2)); |
| 2273 | string_get_size(sdkp->capacity, sector_size, |
| 2274 | STRING_UNITS_10, cap_str_10, |
James Bottomley | 7404ad3b | 2008-08-31 10:41:52 -0500 | [diff] [blame] | 2275 | sizeof(cap_str_10)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2276 | |
Martin K. Petersen | ea09bcc | 2009-05-23 11:43:37 -0400 | [diff] [blame] | 2277 | if (sdkp->first_scan || old_capacity != sdkp->capacity) { |
Martin K. Petersen | 526f7c7 | 2010-09-28 14:48:47 -0400 | [diff] [blame] | 2278 | if (sdkp->physical_block_size != sector_size) |
Martin K. Petersen | ea09bcc | 2009-05-23 11:43:37 -0400 | [diff] [blame] | 2279 | sd_printk(KERN_NOTICE, sdkp, |
| 2280 | "%u-byte physical blocks\n", |
Martin K. Petersen | 526f7c7 | 2010-09-28 14:48:47 -0400 | [diff] [blame] | 2281 | sdkp->physical_block_size); |
Martin K. Petersen | ea09bcc | 2009-05-23 11:43:37 -0400 | [diff] [blame] | 2282 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2283 | } |
| 2284 | |
Martin K. Petersen | ca369d5 | 2015-11-13 16:46:48 -0500 | [diff] [blame] | 2285 | if (sdkp->capacity > 0xffffffff) |
Martin K. Petersen | bcdb247 | 2014-06-03 18:45:51 -0400 | [diff] [blame] | 2286 | sdp->use_16_for_rw = 1; |
Jason J. Herne | 53ad570 | 2012-11-14 17:03:22 -0500 | [diff] [blame] | 2287 | |
Martin K. Petersen | 526f7c7 | 2010-09-28 14:48:47 -0400 | [diff] [blame] | 2288 | blk_queue_physical_block_size(sdp->request_queue, |
| 2289 | sdkp->physical_block_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2290 | sdkp->device->sector_size = sector_size; |
| 2291 | } |
| 2292 | |
| 2293 | /* called with buffer of length 512 */ |
| 2294 | static inline int |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 2295 | sd_do_mode_sense(struct scsi_device *sdp, int dbd, int modepage, |
| 2296 | unsigned char *buffer, int len, struct scsi_mode_data *data, |
| 2297 | struct scsi_sense_hdr *sshdr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2298 | { |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 2299 | return scsi_mode_sense(sdp, dbd, modepage, buffer, len, |
James Bottomley | 1cf7269 | 2005-08-28 11:27:01 -0500 | [diff] [blame] | 2300 | SD_TIMEOUT, SD_MAX_RETRIES, data, |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 2301 | sshdr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2302 | } |
| 2303 | |
| 2304 | /* |
| 2305 | * read write protect setting, if possible - called only in sd_revalidate_disk() |
Al Viro | 4897080 | 2006-02-26 08:34:10 -0600 | [diff] [blame] | 2306 | * called with buffer of length SD_BUF_SIZE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2307 | */ |
| 2308 | static void |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 2309 | sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer) |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 2310 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2311 | int res; |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 2312 | struct scsi_device *sdp = sdkp->device; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2313 | struct scsi_mode_data data; |
| 2314 | |
| 2315 | set_disk_ro(sdkp->disk, 0); |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 2316 | if (sdp->skip_ms_page_3f) { |
Martin K. Petersen | b2bff6c | 2014-01-03 18:19:26 -0500 | [diff] [blame] | 2317 | sd_first_printk(KERN_NOTICE, sdkp, "Assuming Write Enabled\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2318 | return; |
| 2319 | } |
| 2320 | |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 2321 | if (sdp->use_192_bytes_for_3f) { |
| 2322 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 192, &data, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2323 | } else { |
| 2324 | /* |
| 2325 | * First attempt: ask for all pages (0x3F), but only 4 bytes. |
| 2326 | * We have to start carefully: some devices hang if we ask |
| 2327 | * for more than is available. |
| 2328 | */ |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 2329 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 4, &data, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2330 | |
| 2331 | /* |
| 2332 | * Second attempt: ask for page 0 When only page 0 is |
| 2333 | * implemented, a request for page 3F may return Sense Key |
| 2334 | * 5: Illegal Request, Sense Code 24: Invalid field in |
| 2335 | * CDB. |
| 2336 | */ |
| 2337 | if (!scsi_status_is_good(res)) |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 2338 | res = sd_do_mode_sense(sdp, 0, 0, buffer, 4, &data, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2339 | |
| 2340 | /* |
| 2341 | * Third attempt: ask 255 bytes, as we did earlier. |
| 2342 | */ |
| 2343 | if (!scsi_status_is_good(res)) |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 2344 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 255, |
| 2345 | &data, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2346 | } |
| 2347 | |
| 2348 | if (!scsi_status_is_good(res)) { |
Martin K. Petersen | b2bff6c | 2014-01-03 18:19:26 -0500 | [diff] [blame] | 2349 | sd_first_printk(KERN_WARNING, sdkp, |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 2350 | "Test WP failed, assume Write Enabled\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2351 | } else { |
| 2352 | sdkp->write_prot = ((data.device_specific & 0x80) != 0); |
| 2353 | set_disk_ro(sdkp->disk, sdkp->write_prot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2354 | } |
| 2355 | } |
| 2356 | |
| 2357 | /* |
| 2358 | * sd_read_cache_type - called only from sd_revalidate_disk() |
Al Viro | 4897080 | 2006-02-26 08:34:10 -0600 | [diff] [blame] | 2359 | * called with buffer of length SD_BUF_SIZE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2360 | */ |
| 2361 | static void |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 2362 | sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer) |
Al Viro | 631e8a1 | 2005-05-16 01:59:55 +0100 | [diff] [blame] | 2363 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2364 | int len = 0, res; |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 2365 | struct scsi_device *sdp = sdkp->device; |
Subhash Jadavani | 57d6b14 | 2016-07-29 16:50:07 -0700 | [diff] [blame] | 2366 | struct Scsi_Host *host = sdp->host; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2367 | |
Al Viro | 631e8a1 | 2005-05-16 01:59:55 +0100 | [diff] [blame] | 2368 | int dbd; |
| 2369 | int modepage; |
Luben Tuikov | 0bcaa11 | 2011-05-19 00:00:58 -0700 | [diff] [blame] | 2370 | int first_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2371 | struct scsi_mode_data data; |
| 2372 | struct scsi_sense_hdr sshdr; |
James Bottomley | 39c60a0 | 2013-04-24 14:02:53 -0700 | [diff] [blame] | 2373 | |
| 2374 | if (sdkp->cache_override) |
| 2375 | return; |
| 2376 | |
Luben Tuikov | 0bcaa11 | 2011-05-19 00:00:58 -0700 | [diff] [blame] | 2377 | first_len = 4; |
| 2378 | if (sdp->skip_ms_page_8) { |
| 2379 | if (sdp->type == TYPE_RBC) |
| 2380 | goto defaults; |
| 2381 | else { |
| 2382 | if (sdp->skip_ms_page_3f) |
| 2383 | goto defaults; |
| 2384 | modepage = 0x3F; |
| 2385 | if (sdp->use_192_bytes_for_3f) |
| 2386 | first_len = 192; |
| 2387 | dbd = 0; |
| 2388 | } |
| 2389 | } else if (sdp->type == TYPE_RBC) { |
Al Viro | 631e8a1 | 2005-05-16 01:59:55 +0100 | [diff] [blame] | 2390 | modepage = 6; |
| 2391 | dbd = 8; |
| 2392 | } else { |
| 2393 | modepage = 8; |
Subhash Jadavani | 57d6b14 | 2016-07-29 16:50:07 -0700 | [diff] [blame] | 2394 | if (host->set_dbd_for_caching) |
| 2395 | dbd = 8; |
| 2396 | else |
| 2397 | dbd = 0; |
Al Viro | 631e8a1 | 2005-05-16 01:59:55 +0100 | [diff] [blame] | 2398 | } |
| 2399 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2400 | /* cautiously ask */ |
Luben Tuikov | 0bcaa11 | 2011-05-19 00:00:58 -0700 | [diff] [blame] | 2401 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, first_len, |
| 2402 | &data, &sshdr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2403 | |
| 2404 | if (!scsi_status_is_good(res)) |
| 2405 | goto bad_sense; |
| 2406 | |
Al Viro | 6d73c85 | 2006-02-23 02:03:16 +0100 | [diff] [blame] | 2407 | if (!data.header_length) { |
| 2408 | modepage = 6; |
Luben Tuikov | 0bcaa11 | 2011-05-19 00:00:58 -0700 | [diff] [blame] | 2409 | first_len = 0; |
Martin K. Petersen | b2bff6c | 2014-01-03 18:19:26 -0500 | [diff] [blame] | 2410 | sd_first_printk(KERN_ERR, sdkp, |
| 2411 | "Missing header in MODE_SENSE response\n"); |
Al Viro | 6d73c85 | 2006-02-23 02:03:16 +0100 | [diff] [blame] | 2412 | } |
| 2413 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2414 | /* that went OK, now ask for the proper length */ |
| 2415 | len = data.length; |
| 2416 | |
| 2417 | /* |
| 2418 | * We're only interested in the first three bytes, actually. |
| 2419 | * But the data cache page is defined for the first 20. |
| 2420 | */ |
| 2421 | if (len < 3) |
| 2422 | goto bad_sense; |
Luben Tuikov | 0bcaa11 | 2011-05-19 00:00:58 -0700 | [diff] [blame] | 2423 | else if (len > SD_BUF_SIZE) { |
Martin K. Petersen | b2bff6c | 2014-01-03 18:19:26 -0500 | [diff] [blame] | 2424 | sd_first_printk(KERN_NOTICE, sdkp, "Truncating mode parameter " |
Luben Tuikov | 0bcaa11 | 2011-05-19 00:00:58 -0700 | [diff] [blame] | 2425 | "data from %d to %d bytes\n", len, SD_BUF_SIZE); |
| 2426 | len = SD_BUF_SIZE; |
| 2427 | } |
| 2428 | if (modepage == 0x3F && sdp->use_192_bytes_for_3f) |
| 2429 | len = 192; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2430 | |
| 2431 | /* Get the data */ |
Luben Tuikov | 0bcaa11 | 2011-05-19 00:00:58 -0700 | [diff] [blame] | 2432 | if (len > first_len) |
| 2433 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, len, |
| 2434 | &data, &sshdr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2435 | |
| 2436 | if (scsi_status_is_good(res)) { |
Al Viro | 631e8a1 | 2005-05-16 01:59:55 +0100 | [diff] [blame] | 2437 | int offset = data.header_length + data.block_descriptor_length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2438 | |
Luben Tuikov | 0bcaa11 | 2011-05-19 00:00:58 -0700 | [diff] [blame] | 2439 | while (offset < len) { |
| 2440 | u8 page_code = buffer[offset] & 0x3F; |
| 2441 | u8 spf = buffer[offset] & 0x40; |
| 2442 | |
| 2443 | if (page_code == 8 || page_code == 6) { |
| 2444 | /* We're interested only in the first 3 bytes. |
| 2445 | */ |
| 2446 | if (len - offset <= 2) { |
Martin K. Petersen | b2bff6c | 2014-01-03 18:19:26 -0500 | [diff] [blame] | 2447 | sd_first_printk(KERN_ERR, sdkp, |
| 2448 | "Incomplete mode parameter " |
| 2449 | "data\n"); |
Luben Tuikov | 0bcaa11 | 2011-05-19 00:00:58 -0700 | [diff] [blame] | 2450 | goto defaults; |
| 2451 | } else { |
| 2452 | modepage = page_code; |
| 2453 | goto Page_found; |
| 2454 | } |
| 2455 | } else { |
| 2456 | /* Go to the next page */ |
| 2457 | if (spf && len - offset > 3) |
| 2458 | offset += 4 + (buffer[offset+2] << 8) + |
| 2459 | buffer[offset+3]; |
| 2460 | else if (!spf && len - offset > 1) |
| 2461 | offset += 2 + buffer[offset+1]; |
| 2462 | else { |
Martin K. Petersen | b2bff6c | 2014-01-03 18:19:26 -0500 | [diff] [blame] | 2463 | sd_first_printk(KERN_ERR, sdkp, |
| 2464 | "Incomplete mode " |
| 2465 | "parameter data\n"); |
Luben Tuikov | 0bcaa11 | 2011-05-19 00:00:58 -0700 | [diff] [blame] | 2466 | goto defaults; |
| 2467 | } |
| 2468 | } |
Al Viro | 4897080 | 2006-02-26 08:34:10 -0600 | [diff] [blame] | 2469 | } |
| 2470 | |
Martin K. Petersen | b2bff6c | 2014-01-03 18:19:26 -0500 | [diff] [blame] | 2471 | sd_first_printk(KERN_ERR, sdkp, "No Caching mode page found\n"); |
Alan Stern | 984f173 | 2013-09-06 11:49:51 -0400 | [diff] [blame] | 2472 | goto defaults; |
| 2473 | |
Luben Tuikov | 0bcaa11 | 2011-05-19 00:00:58 -0700 | [diff] [blame] | 2474 | Page_found: |
Al Viro | 631e8a1 | 2005-05-16 01:59:55 +0100 | [diff] [blame] | 2475 | if (modepage == 8) { |
| 2476 | sdkp->WCE = ((buffer[offset + 2] & 0x04) != 0); |
| 2477 | sdkp->RCD = ((buffer[offset + 2] & 0x01) != 0); |
| 2478 | } else { |
| 2479 | sdkp->WCE = ((buffer[offset + 2] & 0x01) == 0); |
| 2480 | sdkp->RCD = 0; |
| 2481 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2482 | |
Tejun Heo | 007365a | 2006-01-06 09:53:52 +0100 | [diff] [blame] | 2483 | sdkp->DPOFUA = (data.device_specific & 0x10) != 0; |
Alan Stern | b14bf2d | 2014-06-30 11:04:21 -0400 | [diff] [blame] | 2484 | if (sdp->broken_fua) { |
| 2485 | sd_first_printk(KERN_NOTICE, sdkp, "Disabling FUA\n"); |
| 2486 | sdkp->DPOFUA = 0; |
Damien Le Moal | ee4494c | 2017-01-12 15:25:10 +0900 | [diff] [blame] | 2487 | } else if (sdkp->DPOFUA && !sdkp->device->use_10_for_rw && |
| 2488 | !sdkp->device->use_16_for_rw) { |
Martin K. Petersen | b2bff6c | 2014-01-03 18:19:26 -0500 | [diff] [blame] | 2489 | sd_first_printk(KERN_NOTICE, sdkp, |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 2490 | "Uses READ/WRITE(6), disabling FUA\n"); |
Tejun Heo | 007365a | 2006-01-06 09:53:52 +0100 | [diff] [blame] | 2491 | sdkp->DPOFUA = 0; |
| 2492 | } |
| 2493 | |
Sujit Reddy Thumma | 2eefd57 | 2014-08-11 15:40:37 +0300 | [diff] [blame] | 2494 | /* No cache flush allowed for write protected devices */ |
| 2495 | if (sdkp->WCE && sdkp->write_prot) |
| 2496 | sdkp->WCE = 0; |
| 2497 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2498 | return; |
| 2499 | } |
| 2500 | |
| 2501 | bad_sense: |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 2502 | if (scsi_sense_valid(&sshdr) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2503 | sshdr.sense_key == ILLEGAL_REQUEST && |
| 2504 | sshdr.asc == 0x24 && sshdr.ascq == 0x0) |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 2505 | /* Invalid field in CDB */ |
Martin K. Petersen | b2bff6c | 2014-01-03 18:19:26 -0500 | [diff] [blame] | 2506 | sd_first_printk(KERN_NOTICE, sdkp, "Cache data unavailable\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2507 | else |
Martin K. Petersen | b2bff6c | 2014-01-03 18:19:26 -0500 | [diff] [blame] | 2508 | sd_first_printk(KERN_ERR, sdkp, |
| 2509 | "Asking for cache data failed\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2510 | |
| 2511 | defaults: |
Namjae Jeon | b81478d | 2012-07-07 23:05:08 -0400 | [diff] [blame] | 2512 | if (sdp->wce_default_on) { |
Martin K. Petersen | b2bff6c | 2014-01-03 18:19:26 -0500 | [diff] [blame] | 2513 | sd_first_printk(KERN_NOTICE, sdkp, |
| 2514 | "Assuming drive cache: write back\n"); |
Namjae Jeon | b81478d | 2012-07-07 23:05:08 -0400 | [diff] [blame] | 2515 | sdkp->WCE = 1; |
| 2516 | } else { |
Martin K. Petersen | b2bff6c | 2014-01-03 18:19:26 -0500 | [diff] [blame] | 2517 | sd_first_printk(KERN_ERR, sdkp, |
| 2518 | "Assuming drive cache: write through\n"); |
Namjae Jeon | b81478d | 2012-07-07 23:05:08 -0400 | [diff] [blame] | 2519 | sdkp->WCE = 0; |
| 2520 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2521 | sdkp->RCD = 0; |
Al Viro | 4897080 | 2006-02-26 08:34:10 -0600 | [diff] [blame] | 2522 | sdkp->DPOFUA = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2523 | } |
| 2524 | |
Martin K. Petersen | e0597d7 | 2008-07-17 04:28:34 -0400 | [diff] [blame] | 2525 | /* |
| 2526 | * The ATO bit indicates whether the DIF application tag is available |
| 2527 | * for use by the operating system. |
| 2528 | */ |
H Hartley Sweeten | 439d77f | 2010-08-10 18:01:20 -0700 | [diff] [blame] | 2529 | 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] | 2530 | { |
| 2531 | int res, offset; |
| 2532 | struct scsi_device *sdp = sdkp->device; |
| 2533 | struct scsi_mode_data data; |
| 2534 | struct scsi_sense_hdr sshdr; |
| 2535 | |
| 2536 | if (sdp->type != TYPE_DISK) |
| 2537 | return; |
| 2538 | |
| 2539 | if (sdkp->protection_type == 0) |
| 2540 | return; |
| 2541 | |
| 2542 | res = scsi_mode_sense(sdp, 1, 0x0a, buffer, 36, SD_TIMEOUT, |
| 2543 | SD_MAX_RETRIES, &data, &sshdr); |
| 2544 | |
| 2545 | if (!scsi_status_is_good(res) || !data.header_length || |
| 2546 | data.length < 6) { |
Martin K. Petersen | b2bff6c | 2014-01-03 18:19:26 -0500 | [diff] [blame] | 2547 | sd_first_printk(KERN_WARNING, sdkp, |
Martin K. Petersen | e0597d7 | 2008-07-17 04:28:34 -0400 | [diff] [blame] | 2548 | "getting Control mode page failed, assume no ATO\n"); |
| 2549 | |
| 2550 | if (scsi_sense_valid(&sshdr)) |
| 2551 | sd_print_sense_hdr(sdkp, &sshdr); |
| 2552 | |
| 2553 | return; |
| 2554 | } |
| 2555 | |
| 2556 | offset = data.header_length + data.block_descriptor_length; |
| 2557 | |
| 2558 | if ((buffer[offset] & 0x3f) != 0x0a) { |
Martin K. Petersen | b2bff6c | 2014-01-03 18:19:26 -0500 | [diff] [blame] | 2559 | sd_first_printk(KERN_ERR, sdkp, "ATO Got wrong page\n"); |
Martin K. Petersen | e0597d7 | 2008-07-17 04:28:34 -0400 | [diff] [blame] | 2560 | return; |
| 2561 | } |
| 2562 | |
| 2563 | if ((buffer[offset + 5] & 0x80) == 0) |
| 2564 | return; |
| 2565 | |
| 2566 | sdkp->ATO = 1; |
| 2567 | |
| 2568 | return; |
| 2569 | } |
| 2570 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2571 | /** |
Martin K. Petersen | d11b691 | 2009-05-23 11:43:39 -0400 | [diff] [blame] | 2572 | * sd_read_block_limits - Query disk device for preferred I/O sizes. |
| 2573 | * @disk: disk to query |
| 2574 | */ |
| 2575 | static void sd_read_block_limits(struct scsi_disk *sdkp) |
| 2576 | { |
| 2577 | unsigned int sector_sz = sdkp->device->sector_size; |
Martin K. Petersen | bb2d3de | 2010-03-02 08:44:34 -0500 | [diff] [blame] | 2578 | const int vpd_len = 64; |
James Bottomley | e3deec0 | 2009-11-03 12:33:07 -0600 | [diff] [blame] | 2579 | unsigned char *buffer = kmalloc(vpd_len, GFP_KERNEL); |
Martin K. Petersen | d11b691 | 2009-05-23 11:43:39 -0400 | [diff] [blame] | 2580 | |
James Bottomley | e3deec0 | 2009-11-03 12:33:07 -0600 | [diff] [blame] | 2581 | if (!buffer || |
| 2582 | /* Block Limits VPD */ |
| 2583 | scsi_get_vpd_page(sdkp->device, 0xb0, buffer, vpd_len)) |
| 2584 | goto out; |
Martin K. Petersen | d11b691 | 2009-05-23 11:43:39 -0400 | [diff] [blame] | 2585 | |
| 2586 | blk_queue_io_min(sdkp->disk->queue, |
| 2587 | get_unaligned_be16(&buffer[6]) * sector_sz); |
Martin K. Petersen | ca369d5 | 2015-11-13 16:46:48 -0500 | [diff] [blame] | 2588 | |
| 2589 | sdkp->max_xfer_blocks = get_unaligned_be32(&buffer[8]); |
| 2590 | sdkp->opt_xfer_blocks = get_unaligned_be32(&buffer[12]); |
Martin K. Petersen | d11b691 | 2009-05-23 11:43:39 -0400 | [diff] [blame] | 2591 | |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 2592 | if (buffer[3] == 0x3c) { |
| 2593 | unsigned int lba_count, desc_count; |
| 2594 | |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 2595 | sdkp->max_ws_blocks = (u32)get_unaligned_be64(&buffer[36]); |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 2596 | |
| 2597 | if (!sdkp->lbpme) |
| 2598 | goto out; |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 2599 | |
| 2600 | lba_count = get_unaligned_be32(&buffer[20]); |
| 2601 | desc_count = get_unaligned_be32(&buffer[24]); |
| 2602 | |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 2603 | if (lba_count && desc_count) |
| 2604 | sdkp->max_unmap_blocks = lba_count; |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 2605 | |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 2606 | sdkp->unmap_granularity = get_unaligned_be32(&buffer[28]); |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 2607 | |
| 2608 | if (buffer[32] & 0x80) |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 2609 | sdkp->unmap_alignment = |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 2610 | get_unaligned_be32(&buffer[32]) & ~(1 << 31); |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 2611 | |
| 2612 | if (!sdkp->lbpvpd) { /* LBP VPD page not provided */ |
| 2613 | |
| 2614 | if (sdkp->max_unmap_blocks) |
| 2615 | sd_config_discard(sdkp, SD_LBP_UNMAP); |
| 2616 | else |
| 2617 | sd_config_discard(sdkp, SD_LBP_WS16); |
| 2618 | |
| 2619 | } else { /* LBP VPD page tells us what to use */ |
Martin K. Petersen | e461338 | 2014-12-05 08:58:03 -0500 | [diff] [blame] | 2620 | if (sdkp->lbpu && sdkp->max_unmap_blocks && !sdkp->lbprz) |
| 2621 | sd_config_discard(sdkp, SD_LBP_UNMAP); |
| 2622 | else if (sdkp->lbpws) |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 2623 | sd_config_discard(sdkp, SD_LBP_WS16); |
| 2624 | else if (sdkp->lbpws10) |
| 2625 | sd_config_discard(sdkp, SD_LBP_WS10); |
Martin K. Petersen | 7985090 | 2014-11-07 00:08:13 -0500 | [diff] [blame] | 2626 | else if (sdkp->lbpu && sdkp->max_unmap_blocks) |
| 2627 | sd_config_discard(sdkp, SD_LBP_UNMAP); |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 2628 | else |
| 2629 | sd_config_discard(sdkp, SD_LBP_DISABLE); |
| 2630 | } |
Martin K. Petersen | e339c1a | 2009-11-26 12:00:40 -0500 | [diff] [blame] | 2631 | } |
| 2632 | |
James Bottomley | e3deec0 | 2009-11-03 12:33:07 -0600 | [diff] [blame] | 2633 | out: |
Martin K. Petersen | d11b691 | 2009-05-23 11:43:39 -0400 | [diff] [blame] | 2634 | kfree(buffer); |
| 2635 | } |
| 2636 | |
| 2637 | /** |
Martin K. Petersen | 3821d76 | 2009-05-23 11:43:38 -0400 | [diff] [blame] | 2638 | * sd_read_block_characteristics - Query block dev. characteristics |
| 2639 | * @disk: disk to query |
| 2640 | */ |
| 2641 | static void sd_read_block_characteristics(struct scsi_disk *sdkp) |
| 2642 | { |
James Bottomley | e3deec0 | 2009-11-03 12:33:07 -0600 | [diff] [blame] | 2643 | unsigned char *buffer; |
Martin K. Petersen | 3821d76 | 2009-05-23 11:43:38 -0400 | [diff] [blame] | 2644 | u16 rot; |
Martin K. Petersen | bb2d3de | 2010-03-02 08:44:34 -0500 | [diff] [blame] | 2645 | const int vpd_len = 64; |
Martin K. Petersen | 3821d76 | 2009-05-23 11:43:38 -0400 | [diff] [blame] | 2646 | |
James Bottomley | e3deec0 | 2009-11-03 12:33:07 -0600 | [diff] [blame] | 2647 | buffer = kmalloc(vpd_len, GFP_KERNEL); |
Martin K. Petersen | 3821d76 | 2009-05-23 11:43:38 -0400 | [diff] [blame] | 2648 | |
James Bottomley | e3deec0 | 2009-11-03 12:33:07 -0600 | [diff] [blame] | 2649 | if (!buffer || |
| 2650 | /* Block Device Characteristics VPD */ |
| 2651 | scsi_get_vpd_page(sdkp->device, 0xb1, buffer, vpd_len)) |
| 2652 | goto out; |
Martin K. Petersen | 3821d76 | 2009-05-23 11:43:38 -0400 | [diff] [blame] | 2653 | |
| 2654 | rot = get_unaligned_be16(&buffer[4]); |
| 2655 | |
Mike Snitzer | b277da0 | 2014-10-04 10:55:32 -0600 | [diff] [blame] | 2656 | if (rot == 1) { |
Martin K. Petersen | 3821d76 | 2009-05-23 11:43:38 -0400 | [diff] [blame] | 2657 | queue_flag_set_unlocked(QUEUE_FLAG_NONROT, sdkp->disk->queue); |
Mike Snitzer | b277da0 | 2014-10-04 10:55:32 -0600 | [diff] [blame] | 2658 | queue_flag_clear_unlocked(QUEUE_FLAG_ADD_RANDOM, sdkp->disk->queue); |
| 2659 | } |
Martin K. Petersen | 3821d76 | 2009-05-23 11:43:38 -0400 | [diff] [blame] | 2660 | |
James Bottomley | e3deec0 | 2009-11-03 12:33:07 -0600 | [diff] [blame] | 2661 | out: |
Martin K. Petersen | 3821d76 | 2009-05-23 11:43:38 -0400 | [diff] [blame] | 2662 | kfree(buffer); |
| 2663 | } |
| 2664 | |
Martin K. Petersen | 045d3fe | 2010-09-10 01:22:07 -0400 | [diff] [blame] | 2665 | /** |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 2666 | * sd_read_block_provisioning - Query provisioning VPD page |
Martin K. Petersen | 045d3fe | 2010-09-10 01:22:07 -0400 | [diff] [blame] | 2667 | * @disk: disk to query |
| 2668 | */ |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 2669 | static void sd_read_block_provisioning(struct scsi_disk *sdkp) |
Martin K. Petersen | 045d3fe | 2010-09-10 01:22:07 -0400 | [diff] [blame] | 2670 | { |
| 2671 | unsigned char *buffer; |
| 2672 | const int vpd_len = 8; |
| 2673 | |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 2674 | if (sdkp->lbpme == 0) |
Martin K. Petersen | 045d3fe | 2010-09-10 01:22:07 -0400 | [diff] [blame] | 2675 | return; |
| 2676 | |
| 2677 | buffer = kmalloc(vpd_len, GFP_KERNEL); |
| 2678 | |
| 2679 | if (!buffer || scsi_get_vpd_page(sdkp->device, 0xb2, buffer, vpd_len)) |
| 2680 | goto out; |
| 2681 | |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 2682 | sdkp->lbpvpd = 1; |
| 2683 | sdkp->lbpu = (buffer[5] >> 7) & 1; /* UNMAP */ |
| 2684 | sdkp->lbpws = (buffer[5] >> 6) & 1; /* WRITE SAME(16) with UNMAP */ |
| 2685 | sdkp->lbpws10 = (buffer[5] >> 5) & 1; /* WRITE SAME(10) with UNMAP */ |
Martin K. Petersen | 045d3fe | 2010-09-10 01:22:07 -0400 | [diff] [blame] | 2686 | |
| 2687 | out: |
| 2688 | kfree(buffer); |
| 2689 | } |
| 2690 | |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 2691 | static void sd_read_write_same(struct scsi_disk *sdkp, unsigned char *buffer) |
| 2692 | { |
Martin K. Petersen | 66c28f9 | 2013-06-06 22:15:55 -0400 | [diff] [blame] | 2693 | struct scsi_device *sdev = sdkp->device; |
| 2694 | |
Martin K. Petersen | 54b2b50 | 2013-10-23 06:25:40 -0400 | [diff] [blame] | 2695 | if (sdev->host->no_write_same) { |
| 2696 | sdev->no_write_same = 1; |
| 2697 | |
| 2698 | return; |
| 2699 | } |
| 2700 | |
Martin K. Petersen | 66c28f9 | 2013-06-06 22:15:55 -0400 | [diff] [blame] | 2701 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, INQUIRY) < 0) { |
Bernd Schubert | af73623 | 2013-09-23 14:47:32 +0200 | [diff] [blame] | 2702 | /* too large values might cause issues with arcmsr */ |
| 2703 | int vpd_buf_len = 64; |
| 2704 | |
Martin K. Petersen | 66c28f9 | 2013-06-06 22:15:55 -0400 | [diff] [blame] | 2705 | sdev->no_report_opcodes = 1; |
| 2706 | |
| 2707 | /* Disable WRITE SAME if REPORT SUPPORTED OPERATION |
| 2708 | * CODES is unsupported and the device has an ATA |
| 2709 | * Information VPD page (SAT). |
| 2710 | */ |
Bernd Schubert | af73623 | 2013-09-23 14:47:32 +0200 | [diff] [blame] | 2711 | if (!scsi_get_vpd_page(sdev, 0x89, buffer, vpd_buf_len)) |
Martin K. Petersen | 66c28f9 | 2013-06-06 22:15:55 -0400 | [diff] [blame] | 2712 | sdev->no_write_same = 1; |
| 2713 | } |
| 2714 | |
| 2715 | 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] | 2716 | sdkp->ws16 = 1; |
Martin K. Petersen | 66c28f9 | 2013-06-06 22:15:55 -0400 | [diff] [blame] | 2717 | |
| 2718 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME) == 1) |
| 2719 | sdkp->ws10 = 1; |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 2720 | } |
| 2721 | |
Martin K. Petersen | 3821d76 | 2009-05-23 11:43:38 -0400 | [diff] [blame] | 2722 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2723 | * sd_revalidate_disk - called the first time a new disk is seen, |
| 2724 | * performs disk spin up, read_capacity, etc. |
| 2725 | * @disk: struct gendisk we care about |
| 2726 | **/ |
| 2727 | static int sd_revalidate_disk(struct gendisk *disk) |
| 2728 | { |
| 2729 | struct scsi_disk *sdkp = scsi_disk(disk); |
| 2730 | struct scsi_device *sdp = sdkp->device; |
Martin K. Petersen | ca369d5 | 2015-11-13 16:46:48 -0500 | [diff] [blame] | 2731 | struct request_queue *q = sdkp->disk->queue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2732 | unsigned char *buffer; |
Martin K. Petersen | ca369d5 | 2015-11-13 16:46:48 -0500 | [diff] [blame] | 2733 | unsigned int dev_max, rw_max; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2734 | |
Martin K. Petersen | fa0d34b | 2007-02-27 22:41:19 -0500 | [diff] [blame] | 2735 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, |
| 2736 | "sd_revalidate_disk\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2737 | |
| 2738 | /* |
| 2739 | * If the device is offline, don't try and read capacity or any |
| 2740 | * of the other niceties. |
| 2741 | */ |
| 2742 | if (!scsi_device_online(sdp)) |
| 2743 | goto out; |
| 2744 | |
Bernhard Walle | a6123f1 | 2007-05-21 17:15:26 +0200 | [diff] [blame] | 2745 | buffer = kmalloc(SD_BUF_SIZE, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2746 | if (!buffer) { |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 2747 | sd_printk(KERN_WARNING, sdkp, "sd_revalidate_disk: Memory " |
| 2748 | "allocation failure.\n"); |
James Bottomley | ea73a9f | 2005-08-28 11:33:52 -0500 | [diff] [blame] | 2749 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2750 | } |
| 2751 | |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 2752 | sd_spinup_disk(sdkp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2753 | |
| 2754 | /* |
| 2755 | * Without media there is no reason to ask; moreover, some devices |
| 2756 | * react badly if we do. |
| 2757 | */ |
| 2758 | if (sdkp->media_present) { |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 2759 | sd_read_capacity(sdkp, buffer); |
Martin K. Petersen | ffd4bc2 | 2009-07-29 14:06:53 -0400 | [diff] [blame] | 2760 | |
Hannes Reinecke | 5ddfe08 | 2016-04-01 08:57:36 +0200 | [diff] [blame] | 2761 | if (scsi_device_supports_vpd(sdp)) { |
Martin K. Petersen | c98a0eb | 2011-03-08 02:07:15 -0500 | [diff] [blame] | 2762 | sd_read_block_provisioning(sdkp); |
Martin K. Petersen | ffd4bc2 | 2009-07-29 14:06:53 -0400 | [diff] [blame] | 2763 | sd_read_block_limits(sdkp); |
| 2764 | sd_read_block_characteristics(sdkp); |
| 2765 | } |
| 2766 | |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 2767 | sd_read_write_protect_flag(sdkp, buffer); |
| 2768 | sd_read_cache_type(sdkp, buffer); |
Martin K. Petersen | e0597d7 | 2008-07-17 04:28:34 -0400 | [diff] [blame] | 2769 | sd_read_app_tag_own(sdkp, buffer); |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 2770 | sd_read_write_same(sdkp, buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2771 | } |
Tejun Heo | 461d4e9 | 2006-01-06 09:52:55 +0100 | [diff] [blame] | 2772 | |
Martin K. Petersen | 70a9b87 | 2009-03-09 11:33:31 -0400 | [diff] [blame] | 2773 | sdkp->first_scan = 0; |
| 2774 | |
Tejun Heo | 461d4e9 | 2006-01-06 09:52:55 +0100 | [diff] [blame] | 2775 | /* |
| 2776 | * We now have all cache related info, determine how we deal |
Tejun Heo | 4913efe | 2010-09-03 11:56:16 +0200 | [diff] [blame] | 2777 | * with flush requests. |
Tejun Heo | 461d4e9 | 2006-01-06 09:52:55 +0100 | [diff] [blame] | 2778 | */ |
Vaughan Cao | cb2fb68 | 2014-06-03 17:37:30 +0800 | [diff] [blame] | 2779 | sd_set_flush_flag(sdkp); |
Tejun Heo | 461d4e9 | 2006-01-06 09:52:55 +0100 | [diff] [blame] | 2780 | |
Martin K. Petersen | ca369d5 | 2015-11-13 16:46:48 -0500 | [diff] [blame] | 2781 | /* Initial block count limit based on CDB TRANSFER LENGTH field size. */ |
| 2782 | 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] | 2783 | |
Martin K. Petersen | ca369d5 | 2015-11-13 16:46:48 -0500 | [diff] [blame] | 2784 | /* Some devices report a maximum block count for READ/WRITE requests. */ |
| 2785 | dev_max = min_not_zero(dev_max, sdkp->max_xfer_blocks); |
| 2786 | q->limits.max_dev_sectors = logical_to_sectors(sdp, dev_max); |
| 2787 | |
| 2788 | /* |
| 2789 | * Use the device's preferred I/O size for reads and writes |
Martin K. Petersen | 9c1d9c2 | 2015-12-16 17:53:52 -0500 | [diff] [blame] | 2790 | * unless the reported value is unreasonably small, large, or |
| 2791 | * garbage. |
Martin K. Petersen | ca369d5 | 2015-11-13 16:46:48 -0500 | [diff] [blame] | 2792 | */ |
Martin K. Petersen | 9c1d9c2 | 2015-12-16 17:53:52 -0500 | [diff] [blame] | 2793 | if (sdkp->opt_xfer_blocks && |
| 2794 | sdkp->opt_xfer_blocks <= dev_max && |
| 2795 | sdkp->opt_xfer_blocks <= SD_DEF_XFER_BLOCKS && |
Sayali Lokhande | c60b050 | 2017-04-06 09:56:52 +0530 | [diff] [blame] | 2796 | sdkp->opt_xfer_blocks * sdp->sector_size >= PAGE_SIZE) |
| 2797 | rw_max = q->limits.io_opt = |
| 2798 | sdkp->opt_xfer_blocks * sdp->sector_size; |
| 2799 | else |
Fam Zheng | 82d181d | 2017-03-28 12:41:26 +0800 | [diff] [blame] | 2800 | rw_max = min_not_zero(logical_to_sectors(sdp, dev_max), |
| 2801 | (sector_t)BLK_DEF_MAX_SECTORS); |
Martin K. Petersen | ca369d5 | 2015-11-13 16:46:48 -0500 | [diff] [blame] | 2802 | |
| 2803 | /* Combine with controller limits */ |
| 2804 | 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] | 2805 | |
Martin K. Petersen | f08bb1e | 2016-03-28 21:18:56 -0400 | [diff] [blame] | 2806 | set_capacity(disk, logical_to_sectors(sdp, sdkp->capacity)); |
Martin K. Petersen | 5db4486 | 2012-09-18 12:19:32 -0400 | [diff] [blame] | 2807 | sd_config_write_same(sdkp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2808 | kfree(buffer); |
| 2809 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2810 | out: |
| 2811 | return 0; |
| 2812 | } |
| 2813 | |
| 2814 | /** |
Tejun Heo | 72ec24b | 2010-05-15 20:09:32 +0200 | [diff] [blame] | 2815 | * sd_unlock_native_capacity - unlock native capacity |
| 2816 | * @disk: struct gendisk to set capacity for |
| 2817 | * |
| 2818 | * Block layer calls this function if it detects that partitions |
| 2819 | * on @disk reach beyond the end of the device. If the SCSI host |
| 2820 | * implements ->unlock_native_capacity() method, it's invoked to |
| 2821 | * give it a chance to adjust the device capacity. |
| 2822 | * |
| 2823 | * CONTEXT: |
| 2824 | * Defined by block layer. Might sleep. |
| 2825 | */ |
| 2826 | static void sd_unlock_native_capacity(struct gendisk *disk) |
| 2827 | { |
| 2828 | struct scsi_device *sdev = scsi_disk(disk)->device; |
| 2829 | |
| 2830 | if (sdev->host->hostt->unlock_native_capacity) |
| 2831 | sdev->host->hostt->unlock_native_capacity(sdev); |
| 2832 | } |
| 2833 | |
| 2834 | /** |
Tejun Heo | 3e1a7ff | 2008-08-25 19:56:17 +0900 | [diff] [blame] | 2835 | * sd_format_disk_name - format disk name |
| 2836 | * @prefix: name prefix - ie. "sd" for SCSI disks |
| 2837 | * @index: index of the disk to format name for |
| 2838 | * @buf: output buffer |
| 2839 | * @buflen: length of the output buffer |
| 2840 | * |
| 2841 | * SCSI disk names starts at sda. The 26th device is sdz and the |
| 2842 | * 27th is sdaa. The last one for two lettered suffix is sdzz |
| 2843 | * which is followed by sdaaa. |
| 2844 | * |
| 2845 | * This is basically 26 base counting with one extra 'nil' entry |
Daniel Mack | 3ad2f3f | 2010-02-03 08:01:28 +0800 | [diff] [blame] | 2846 | * at the beginning from the second digit on and can be |
Tejun Heo | 3e1a7ff | 2008-08-25 19:56:17 +0900 | [diff] [blame] | 2847 | * determined using similar method as 26 base conversion with the |
| 2848 | * index shifted -1 after each digit is computed. |
| 2849 | * |
| 2850 | * CONTEXT: |
| 2851 | * Don't care. |
| 2852 | * |
| 2853 | * RETURNS: |
| 2854 | * 0 on success, -errno on failure. |
| 2855 | */ |
| 2856 | static int sd_format_disk_name(char *prefix, int index, char *buf, int buflen) |
| 2857 | { |
| 2858 | const int base = 'z' - 'a' + 1; |
| 2859 | char *begin = buf + strlen(prefix); |
| 2860 | char *end = buf + buflen; |
| 2861 | char *p; |
| 2862 | int unit; |
| 2863 | |
| 2864 | p = end - 1; |
| 2865 | *p = '\0'; |
| 2866 | unit = base; |
| 2867 | do { |
| 2868 | if (p == begin) |
| 2869 | return -EINVAL; |
| 2870 | *--p = 'a' + (index % unit); |
| 2871 | index = (index / unit) - 1; |
| 2872 | } while (index >= 0); |
| 2873 | |
| 2874 | memmove(begin, p, end - p); |
| 2875 | memcpy(buf, prefix, strlen(prefix)); |
| 2876 | |
| 2877 | return 0; |
| 2878 | } |
| 2879 | |
Arjan van de Ven | 4ace92f | 2009-01-04 05:32:28 -0800 | [diff] [blame] | 2880 | /* |
| 2881 | * The asynchronous part of sd_probe |
| 2882 | */ |
| 2883 | static void sd_probe_async(void *data, async_cookie_t cookie) |
| 2884 | { |
| 2885 | struct scsi_disk *sdkp = data; |
| 2886 | struct scsi_device *sdp; |
| 2887 | struct gendisk *gd; |
| 2888 | u32 index; |
| 2889 | struct device *dev; |
| 2890 | |
| 2891 | sdp = sdkp->device; |
| 2892 | gd = sdkp->disk; |
| 2893 | index = sdkp->index; |
| 2894 | dev = &sdp->sdev_gendev; |
| 2895 | |
Michael Reed | 1a03ae0 | 2010-09-20 11:20:22 -0500 | [diff] [blame] | 2896 | gd->major = sd_major((index & 0xf0) >> 4); |
| 2897 | gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00); |
| 2898 | gd->minors = SD_MINORS; |
| 2899 | |
Arjan van de Ven | 4ace92f | 2009-01-04 05:32:28 -0800 | [diff] [blame] | 2900 | gd->fops = &sd_fops; |
| 2901 | gd->private_data = &sdkp->driver; |
| 2902 | gd->queue = sdkp->device->request_queue; |
| 2903 | |
Martin K. Petersen | 70a9b87 | 2009-03-09 11:33:31 -0400 | [diff] [blame] | 2904 | /* defaults, until the device tells us otherwise */ |
| 2905 | sdp->sector_size = 512; |
| 2906 | sdkp->capacity = 0; |
| 2907 | sdkp->media_present = 1; |
| 2908 | sdkp->write_prot = 0; |
James Bottomley | 39c60a0 | 2013-04-24 14:02:53 -0700 | [diff] [blame] | 2909 | sdkp->cache_override = 0; |
Martin K. Petersen | 70a9b87 | 2009-03-09 11:33:31 -0400 | [diff] [blame] | 2910 | sdkp->WCE = 0; |
| 2911 | sdkp->RCD = 0; |
| 2912 | sdkp->ATO = 0; |
| 2913 | sdkp->first_scan = 1; |
Martin K. Petersen | 18a4d0a | 2012-02-09 13:48:53 -0500 | [diff] [blame] | 2914 | sdkp->max_medium_access_timeouts = SD_MAX_MEDIUM_TIMEOUTS; |
Martin K. Petersen | 70a9b87 | 2009-03-09 11:33:31 -0400 | [diff] [blame] | 2915 | |
Arjan van de Ven | 4ace92f | 2009-01-04 05:32:28 -0800 | [diff] [blame] | 2916 | sd_revalidate_disk(gd); |
| 2917 | |
NeilBrown | 97fedbb | 2010-03-16 08:55:32 +0100 | [diff] [blame] | 2918 | gd->flags = GENHD_FL_EXT_DEVT; |
Tejun Heo | 2bae009 | 2010-12-18 18:42:23 +0100 | [diff] [blame] | 2919 | if (sdp->removable) { |
Arjan van de Ven | 4ace92f | 2009-01-04 05:32:28 -0800 | [diff] [blame] | 2920 | gd->flags |= GENHD_FL_REMOVABLE; |
Tejun Heo | 2bae009 | 2010-12-18 18:42:23 +0100 | [diff] [blame] | 2921 | gd->events |= DISK_EVENT_MEDIA_CHANGE; |
| 2922 | } |
Arjan van de Ven | 4ace92f | 2009-01-04 05:32:28 -0800 | [diff] [blame] | 2923 | |
Aaron Lu | 10c580e | 2013-10-10 13:22:36 +0800 | [diff] [blame] | 2924 | blk_pm_runtime_init(sdp->request_queue, dev); |
Subhash Jadavani | 57d6b14 | 2016-07-29 16:50:07 -0700 | [diff] [blame] | 2925 | if (sdp->autosuspend_delay >= 0) |
| 2926 | pm_runtime_set_autosuspend_delay(dev, sdp->autosuspend_delay); |
| 2927 | |
Dan Williams | 0d52c756 | 2016-06-15 19:44:20 -0700 | [diff] [blame] | 2928 | device_add_disk(dev, gd); |
Martin K. Petersen | fe54239 | 2012-09-21 12:44:12 -0400 | [diff] [blame] | 2929 | if (sdkp->capacity) |
| 2930 | sd_dif_config_host(sdkp); |
Arjan van de Ven | 4ace92f | 2009-01-04 05:32:28 -0800 | [diff] [blame] | 2931 | |
Martin K. Petersen | 3821d76 | 2009-05-23 11:43:38 -0400 | [diff] [blame] | 2932 | sd_revalidate_disk(gd); |
| 2933 | |
Alan Stern | 478a8a0 | 2010-06-16 14:52:17 -0400 | [diff] [blame] | 2934 | scsi_autopm_put_device(sdp); |
James Bottomley | ea038f6 | 2009-08-21 09:47:54 -0600 | [diff] [blame] | 2935 | put_device(&sdkp->dev); |
Arjan van de Ven | 4ace92f | 2009-01-04 05:32:28 -0800 | [diff] [blame] | 2936 | } |
| 2937 | |
Tejun Heo | 3e1a7ff | 2008-08-25 19:56:17 +0900 | [diff] [blame] | 2938 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2939 | * sd_probe - called during driver initialization and whenever a |
| 2940 | * new scsi device is attached to the system. It is called once |
| 2941 | * for each scsi device (not just disks) present. |
| 2942 | * @dev: pointer to device object |
| 2943 | * |
| 2944 | * Returns 0 if successful (or not interested in this scsi device |
| 2945 | * (e.g. scanner)); 1 when there is an error. |
| 2946 | * |
| 2947 | * Note: this function is invoked from the scsi mid-level. |
| 2948 | * This function sets up the mapping between a given |
| 2949 | * <host,channel,id,lun> (found in sdp) and new device name |
| 2950 | * (e.g. /dev/sda). More precisely it is the block device major |
| 2951 | * and minor number that is chosen here. |
| 2952 | * |
Petr Uzel | 2db93ce | 2012-02-24 16:56:54 +0100 | [diff] [blame] | 2953 | * Assume sd_probe is not re-entrant (for time being) |
| 2954 | * Also think about sd_probe() and sd_remove() running coincidentally. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2955 | **/ |
| 2956 | static int sd_probe(struct device *dev) |
| 2957 | { |
| 2958 | struct scsi_device *sdp = to_scsi_device(dev); |
| 2959 | struct scsi_disk *sdkp; |
| 2960 | struct gendisk *gd; |
H Hartley Sweeten | 439d77f | 2010-08-10 18:01:20 -0700 | [diff] [blame] | 2961 | int index; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2962 | int error; |
| 2963 | |
Subhash Jadavani | 6fe8c1d | 2014-09-10 14:54:09 +0300 | [diff] [blame] | 2964 | scsi_autopm_get_device(sdp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2965 | error = -ENODEV; |
Al Viro | 631e8a1 | 2005-05-16 01:59:55 +0100 | [diff] [blame] | 2966 | 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] | 2967 | goto out; |
| 2968 | |
James Bottomley | 9ccfc75 | 2005-10-02 11:45:08 -0500 | [diff] [blame] | 2969 | SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO, sdp, |
Petr Uzel | 2db93ce | 2012-02-24 16:56:54 +0100 | [diff] [blame] | 2970 | "sd_probe\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2971 | |
| 2972 | error = -ENOMEM; |
Jes Sorensen | 24669f75 | 2006-01-16 10:31:18 -0500 | [diff] [blame] | 2973 | sdkp = kzalloc(sizeof(*sdkp), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2974 | if (!sdkp) |
| 2975 | goto out; |
| 2976 | |
Tejun Heo | 689d6fa | 2008-08-25 19:56:16 +0900 | [diff] [blame] | 2977 | gd = alloc_disk(SD_MINORS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2978 | if (!gd) |
| 2979 | goto out_free; |
| 2980 | |
Tejun Heo | f27bac2 | 2008-07-14 14:59:30 +0900 | [diff] [blame] | 2981 | do { |
| 2982 | if (!ida_pre_get(&sd_index_ida, GFP_KERNEL)) |
| 2983 | goto out_put; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2984 | |
Tejun Heo | 4034cc6 | 2009-02-21 11:04:45 +0900 | [diff] [blame] | 2985 | spin_lock(&sd_index_lock); |
Tejun Heo | f27bac2 | 2008-07-14 14:59:30 +0900 | [diff] [blame] | 2986 | error = ida_get_new(&sd_index_ida, &index); |
Tejun Heo | 4034cc6 | 2009-02-21 11:04:45 +0900 | [diff] [blame] | 2987 | spin_unlock(&sd_index_lock); |
Tejun Heo | f27bac2 | 2008-07-14 14:59:30 +0900 | [diff] [blame] | 2988 | } while (error == -EAGAIN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2989 | |
Dave Kleikamp | 21208ae | 2011-10-19 11:49:04 -0500 | [diff] [blame] | 2990 | if (error) { |
| 2991 | sdev_printk(KERN_WARNING, sdp, "sd_probe: memory exhausted.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2992 | goto out_put; |
Michael Reed | 1a03ae0 | 2010-09-20 11:20:22 -0500 | [diff] [blame] | 2993 | } |
| 2994 | |
Tejun Heo | 3e1a7ff | 2008-08-25 19:56:17 +0900 | [diff] [blame] | 2995 | 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] | 2996 | if (error) { |
| 2997 | sdev_printk(KERN_WARNING, sdp, "SCSI disk (sd) name length exceeded.\n"); |
Tejun Heo | f27bac2 | 2008-07-14 14:59:30 +0900 | [diff] [blame] | 2998 | goto out_free_index; |
Dave Kleikamp | 21208ae | 2011-10-19 11:49:04 -0500 | [diff] [blame] | 2999 | } |
Tejun Heo | f27bac2 | 2008-07-14 14:59:30 +0900 | [diff] [blame] | 3000 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3001 | sdkp->device = sdp; |
| 3002 | sdkp->driver = &sd_template; |
| 3003 | sdkp->disk = gd; |
| 3004 | sdkp->index = index; |
Arnd Bergmann | 409f349 | 2010-07-07 16:51:29 +0200 | [diff] [blame] | 3005 | atomic_set(&sdkp->openers, 0); |
Josh Hunt | 9e1a153 | 2012-06-09 07:03:39 -0700 | [diff] [blame] | 3006 | atomic_set(&sdkp->device->ioerr_cnt, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3007 | |
James Bottomley | 601e763 | 2009-05-26 20:35:48 +0000 | [diff] [blame] | 3008 | if (!sdp->request_queue->rq_timeout) { |
| 3009 | if (sdp->type != TYPE_MOD) |
| 3010 | blk_queue_rq_timeout(sdp->request_queue, SD_TIMEOUT); |
| 3011 | else |
| 3012 | blk_queue_rq_timeout(sdp->request_queue, |
| 3013 | SD_MOD_TIMEOUT); |
| 3014 | } |
| 3015 | |
| 3016 | device_initialize(&sdkp->dev); |
Alan Stern | 478a8a0 | 2010-06-16 14:52:17 -0400 | [diff] [blame] | 3017 | sdkp->dev.parent = dev; |
James Bottomley | 601e763 | 2009-05-26 20:35:48 +0000 | [diff] [blame] | 3018 | sdkp->dev.class = &sd_disk_class; |
Kees Cook | 02aa2a3 | 2013-07-03 15:04:56 -0700 | [diff] [blame] | 3019 | dev_set_name(&sdkp->dev, "%s", dev_name(dev)); |
James Bottomley | 601e763 | 2009-05-26 20:35:48 +0000 | [diff] [blame] | 3020 | |
Dan Carpenter | dee0586 | 2015-01-19 17:41:12 +0300 | [diff] [blame] | 3021 | error = device_add(&sdkp->dev); |
| 3022 | if (error) |
James Bottomley | 601e763 | 2009-05-26 20:35:48 +0000 | [diff] [blame] | 3023 | goto out_free_index; |
| 3024 | |
Alan Stern | 478a8a0 | 2010-06-16 14:52:17 -0400 | [diff] [blame] | 3025 | get_device(dev); |
| 3026 | dev_set_drvdata(dev, sdkp); |
James Bottomley | 601e763 | 2009-05-26 20:35:48 +0000 | [diff] [blame] | 3027 | |
James Bottomley | ea038f6 | 2009-08-21 09:47:54 -0600 | [diff] [blame] | 3028 | get_device(&sdkp->dev); /* prevent release before async_schedule */ |
Dan Williams | a7a20d1 | 2012-03-22 17:05:11 -0700 | [diff] [blame] | 3029 | async_schedule_domain(sd_probe_async, sdkp, &scsi_sd_probe_domain); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3030 | |
| 3031 | return 0; |
| 3032 | |
Tejun Heo | f27bac2 | 2008-07-14 14:59:30 +0900 | [diff] [blame] | 3033 | out_free_index: |
Tejun Heo | 4034cc6 | 2009-02-21 11:04:45 +0900 | [diff] [blame] | 3034 | spin_lock(&sd_index_lock); |
Tejun Heo | f27bac2 | 2008-07-14 14:59:30 +0900 | [diff] [blame] | 3035 | ida_remove(&sd_index_ida, index); |
Tejun Heo | 4034cc6 | 2009-02-21 11:04:45 +0900 | [diff] [blame] | 3036 | spin_unlock(&sd_index_lock); |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 3037 | out_put: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3038 | put_disk(gd); |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 3039 | out_free: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3040 | kfree(sdkp); |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 3041 | out: |
Subhash Jadavani | 6fe8c1d | 2014-09-10 14:54:09 +0300 | [diff] [blame] | 3042 | scsi_autopm_put_device(sdp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3043 | return error; |
| 3044 | } |
| 3045 | |
| 3046 | /** |
| 3047 | * sd_remove - called whenever a scsi disk (previously recognized by |
| 3048 | * sd_probe) is detached from the system. It is called (potentially |
| 3049 | * multiple times) during sd module unload. |
| 3050 | * @sdp: pointer to mid level scsi device object |
| 3051 | * |
| 3052 | * Note: this function is invoked from the scsi mid-level. |
| 3053 | * This function potentially frees up a device name (e.g. /dev/sdc) |
| 3054 | * that could be re-used by a subsequent sd_probe(). |
| 3055 | * This function is not called when the built-in sd driver is "exit-ed". |
| 3056 | **/ |
| 3057 | static int sd_remove(struct device *dev) |
| 3058 | { |
James Bottomley | 601e763 | 2009-05-26 20:35:48 +0000 | [diff] [blame] | 3059 | struct scsi_disk *sdkp; |
Hannes Reinecke | 0761df9 | 2013-05-10 11:06:16 +0200 | [diff] [blame] | 3060 | dev_t devt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3061 | |
James Bottomley | 601e763 | 2009-05-26 20:35:48 +0000 | [diff] [blame] | 3062 | sdkp = dev_get_drvdata(dev); |
Hannes Reinecke | 0761df9 | 2013-05-10 11:06:16 +0200 | [diff] [blame] | 3063 | devt = disk_devt(sdkp->disk); |
Alan Stern | 478a8a0 | 2010-06-16 14:52:17 -0400 | [diff] [blame] | 3064 | scsi_autopm_get_device(sdkp->device); |
| 3065 | |
Dan Williams | 3c31b52 | 2014-04-10 15:30:35 -0700 | [diff] [blame] | 3066 | async_synchronize_full_domain(&scsi_sd_pm_domain); |
Dan Williams | a7a20d1 | 2012-03-22 17:05:11 -0700 | [diff] [blame] | 3067 | async_synchronize_full_domain(&scsi_sd_probe_domain); |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 3068 | device_del(&sdkp->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3069 | del_gendisk(sdkp->disk); |
| 3070 | sd_shutdown(dev); |
Alan Stern | 39b7f1e | 2005-11-04 14:44:41 -0500 | [diff] [blame] | 3071 | |
Hannes Reinecke | 0761df9 | 2013-05-10 11:06:16 +0200 | [diff] [blame] | 3072 | blk_register_region(devt, SD_MINORS, NULL, |
| 3073 | sd_default_probe, NULL, NULL); |
| 3074 | |
Arjan van de Ven | 0b95067 | 2006-01-11 13:16:10 +0100 | [diff] [blame] | 3075 | mutex_lock(&sd_ref_mutex); |
Alan Stern | 39b7f1e | 2005-11-04 14:44:41 -0500 | [diff] [blame] | 3076 | dev_set_drvdata(dev, NULL); |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 3077 | put_device(&sdkp->dev); |
Arjan van de Ven | 0b95067 | 2006-01-11 13:16:10 +0100 | [diff] [blame] | 3078 | mutex_unlock(&sd_ref_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3079 | |
| 3080 | return 0; |
| 3081 | } |
| 3082 | |
| 3083 | /** |
| 3084 | * scsi_disk_release - Called to free the scsi_disk structure |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 3085 | * @dev: pointer to embedded class device |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3086 | * |
Arjan van de Ven | 0b95067 | 2006-01-11 13:16:10 +0100 | [diff] [blame] | 3087 | * sd_ref_mutex must be held entering this routine. Because it is |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3088 | * called on last put, you should always use the scsi_disk_get() |
| 3089 | * scsi_disk_put() helpers which manipulate the semaphore directly |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 3090 | * and never do a direct put_device. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3091 | **/ |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 3092 | static void scsi_disk_release(struct device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3093 | { |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 3094 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3095 | struct gendisk *disk = sdkp->disk; |
| 3096 | |
Tejun Heo | 4034cc6 | 2009-02-21 11:04:45 +0900 | [diff] [blame] | 3097 | spin_lock(&sd_index_lock); |
Tejun Heo | f27bac2 | 2008-07-14 14:59:30 +0900 | [diff] [blame] | 3098 | ida_remove(&sd_index_ida, sdkp->index); |
Tejun Heo | 4034cc6 | 2009-02-21 11:04:45 +0900 | [diff] [blame] | 3099 | spin_unlock(&sd_index_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3100 | |
| 3101 | disk->private_data = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3102 | put_disk(disk); |
Alan Stern | 39b7f1e | 2005-11-04 14:44:41 -0500 | [diff] [blame] | 3103 | put_device(&sdkp->device->sdev_gendev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3104 | |
| 3105 | kfree(sdkp); |
| 3106 | } |
| 3107 | |
James Bottomley | cc5d2c8 | 2007-03-20 12:26:03 -0500 | [diff] [blame] | 3108 | static int sd_start_stop_device(struct scsi_disk *sdkp, int start) |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 3109 | { |
| 3110 | unsigned char cmd[6] = { START_STOP }; /* START_VALID */ |
| 3111 | struct scsi_sense_hdr sshdr; |
James Bottomley | cc5d2c8 | 2007-03-20 12:26:03 -0500 | [diff] [blame] | 3112 | struct scsi_device *sdp = sdkp->device; |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 3113 | int res; |
| 3114 | |
| 3115 | if (start) |
| 3116 | cmd[4] |= 1; /* START */ |
| 3117 | |
Stefan Richter | d2886ea | 2008-05-11 00:34:07 +0200 | [diff] [blame] | 3118 | if (sdp->start_stop_pwr_cond) |
| 3119 | cmd[4] |= start ? 1 << 4 : 3 << 4; /* Active or Standby */ |
| 3120 | |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 3121 | if (!scsi_device_online(sdp)) |
| 3122 | return -ENODEV; |
| 3123 | |
Lin Ming | 9b21493 | 2013-03-23 11:42:25 +0800 | [diff] [blame] | 3124 | res = scsi_execute_req_flags(sdp, cmd, DMA_NONE, NULL, 0, &sshdr, |
| 3125 | SD_TIMEOUT, SD_MAX_RETRIES, NULL, REQ_PM); |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 3126 | if (res) { |
Hannes Reinecke | ef61329 | 2014-10-24 14:27:00 +0200 | [diff] [blame] | 3127 | sd_print_result(sdkp, "Start/Stop Unit failed", res); |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 3128 | if (driver_byte(res) & DRIVER_SENSE) |
James Bottomley | cc5d2c8 | 2007-03-20 12:26:03 -0500 | [diff] [blame] | 3129 | sd_print_sense_hdr(sdkp, &sshdr); |
Oliver Neukum | 9589791 | 2013-09-16 13:28:15 +0200 | [diff] [blame] | 3130 | if (scsi_sense_valid(&sshdr) && |
| 3131 | /* 0x3a is medium not present */ |
| 3132 | sshdr.asc == 0x3a) |
| 3133 | res = 0; |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 3134 | } |
| 3135 | |
Oliver Neukum | 9589791 | 2013-09-16 13:28:15 +0200 | [diff] [blame] | 3136 | /* SCSI error codes must not go to the generic layer */ |
| 3137 | if (res) |
| 3138 | return -EIO; |
| 3139 | |
| 3140 | return 0; |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 3141 | } |
| 3142 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3143 | /* |
| 3144 | * Send a SYNCHRONIZE CACHE instruction down to the device through |
| 3145 | * the normal SCSI command structure. Wait for the command to |
| 3146 | * complete. |
| 3147 | */ |
| 3148 | static void sd_shutdown(struct device *dev) |
| 3149 | { |
Christoph Hellwig | 3d9a1f5 | 2015-02-02 14:01:25 +0100 | [diff] [blame] | 3150 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3151 | |
| 3152 | if (!sdkp) |
| 3153 | return; /* this can happen */ |
| 3154 | |
Lin Ming | 54f57588 | 2011-12-05 09:20:26 +0800 | [diff] [blame] | 3155 | if (pm_runtime_suspended(dev)) |
Christoph Hellwig | 3d9a1f5 | 2015-02-02 14:01:25 +0100 | [diff] [blame] | 3156 | return; |
Lin Ming | 54f57588 | 2011-12-05 09:20:26 +0800 | [diff] [blame] | 3157 | |
Oliver Neukum | 9589791 | 2013-09-16 13:28:15 +0200 | [diff] [blame] | 3158 | if (sdkp->WCE && sdkp->media_present) { |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 3159 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
| 3160 | sd_sync_cache(sdkp); |
Alan Stern | 39b7f1e | 2005-11-04 14:44:41 -0500 | [diff] [blame] | 3161 | } |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 3162 | |
James Bottomley | cc5d2c8 | 2007-03-20 12:26:03 -0500 | [diff] [blame] | 3163 | if (system_state != SYSTEM_RESTART && sdkp->device->manage_start_stop) { |
| 3164 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); |
| 3165 | sd_start_stop_device(sdkp, 0); |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 3166 | } |
Alan Stern | 39b7f1e | 2005-11-04 14:44:41 -0500 | [diff] [blame] | 3167 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3168 | |
Oliver Neukum | 9589791 | 2013-09-16 13:28:15 +0200 | [diff] [blame] | 3169 | static int sd_suspend_common(struct device *dev, bool ignore_stop_errors) |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 3170 | { |
Christoph Hellwig | 3d9a1f5 | 2015-02-02 14:01:25 +0100 | [diff] [blame] | 3171 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
Alan Stern | 09ff92f | 2007-05-21 09:55:04 -0400 | [diff] [blame] | 3172 | int ret = 0; |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 3173 | |
Alan Stern | 13b4389 | 2016-01-20 11:26:01 -0500 | [diff] [blame] | 3174 | if (!sdkp) /* E.g.: runtime suspend following sd_remove() */ |
| 3175 | return 0; |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 3176 | |
Oliver Neukum | 9589791 | 2013-09-16 13:28:15 +0200 | [diff] [blame] | 3177 | if (sdkp->WCE && sdkp->media_present) { |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 3178 | ret = sd_sync_cache(sdkp); |
Oliver Neukum | 9589791 | 2013-09-16 13:28:15 +0200 | [diff] [blame] | 3179 | if (ret) { |
| 3180 | /* ignore OFFLINE device */ |
| 3181 | if (ret == -ENODEV) |
| 3182 | ret = 0; |
Alan Stern | 09ff92f | 2007-05-21 09:55:04 -0400 | [diff] [blame] | 3183 | goto done; |
Oliver Neukum | 9589791 | 2013-09-16 13:28:15 +0200 | [diff] [blame] | 3184 | } |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 3185 | } |
| 3186 | |
Aaron Lu | 691e3d3 | 2012-11-09 15:27:55 +0800 | [diff] [blame] | 3187 | if (sdkp->device->manage_start_stop) { |
Subhash Jadavani | 57d6b14 | 2016-07-29 16:50:07 -0700 | [diff] [blame] | 3188 | sd_printk(KERN_DEBUG, sdkp, "Stopping disk\n"); |
Oliver Neukum | 9589791 | 2013-09-16 13:28:15 +0200 | [diff] [blame] | 3189 | /* an error is not worth aborting a system sleep */ |
James Bottomley | cc5d2c8 | 2007-03-20 12:26:03 -0500 | [diff] [blame] | 3190 | ret = sd_start_stop_device(sdkp, 0); |
Oliver Neukum | 9589791 | 2013-09-16 13:28:15 +0200 | [diff] [blame] | 3191 | if (ignore_stop_errors) |
| 3192 | ret = 0; |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 3193 | } |
| 3194 | |
Alan Stern | 09ff92f | 2007-05-21 09:55:04 -0400 | [diff] [blame] | 3195 | done: |
Alan Stern | 09ff92f | 2007-05-21 09:55:04 -0400 | [diff] [blame] | 3196 | return ret; |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 3197 | } |
| 3198 | |
Oliver Neukum | 9589791 | 2013-09-16 13:28:15 +0200 | [diff] [blame] | 3199 | static int sd_suspend_system(struct device *dev) |
| 3200 | { |
| 3201 | return sd_suspend_common(dev, true); |
| 3202 | } |
| 3203 | |
| 3204 | static int sd_suspend_runtime(struct device *dev) |
| 3205 | { |
| 3206 | return sd_suspend_common(dev, false); |
| 3207 | } |
| 3208 | |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 3209 | static int sd_resume(struct device *dev) |
| 3210 | { |
Christoph Hellwig | 3d9a1f5 | 2015-02-02 14:01:25 +0100 | [diff] [blame] | 3211 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 3212 | |
Alan Stern | 13b4389 | 2016-01-20 11:26:01 -0500 | [diff] [blame] | 3213 | if (!sdkp) /* E.g.: runtime resume at the start of sd_probe() */ |
| 3214 | return 0; |
| 3215 | |
James Bottomley | cc5d2c8 | 2007-03-20 12:26:03 -0500 | [diff] [blame] | 3216 | if (!sdkp->device->manage_start_stop) |
Christoph Hellwig | 3d9a1f5 | 2015-02-02 14:01:25 +0100 | [diff] [blame] | 3217 | return 0; |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 3218 | |
Subhash Jadavani | 57d6b14 | 2016-07-29 16:50:07 -0700 | [diff] [blame] | 3219 | sd_printk(KERN_DEBUG, sdkp, "Starting disk\n"); |
Christoph Hellwig | 3d9a1f5 | 2015-02-02 14:01:25 +0100 | [diff] [blame] | 3220 | return sd_start_stop_device(sdkp, 1); |
Tejun Heo | c3c94c5 | 2007-03-21 00:13:59 +0900 | [diff] [blame] | 3221 | } |
| 3222 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3223 | /** |
| 3224 | * init_sd - entry point for this driver (both when built in or when |
| 3225 | * a module). |
| 3226 | * |
| 3227 | * Note: this function registers this driver with the scsi mid-level. |
| 3228 | **/ |
| 3229 | static int __init init_sd(void) |
| 3230 | { |
Jeff Garzik | 5e4009b | 2006-10-04 05:32:54 -0400 | [diff] [blame] | 3231 | int majors = 0, i, err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3232 | |
| 3233 | SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n")); |
| 3234 | |
Hannes Reinecke | 0761df9 | 2013-05-10 11:06:16 +0200 | [diff] [blame] | 3235 | for (i = 0; i < SD_MAJORS; i++) { |
| 3236 | if (register_blkdev(sd_major(i), "sd") != 0) |
| 3237 | continue; |
| 3238 | majors++; |
| 3239 | blk_register_region(sd_major(i), SD_MINORS, NULL, |
| 3240 | sd_default_probe, NULL, NULL); |
| 3241 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3242 | |
| 3243 | if (!majors) |
| 3244 | return -ENODEV; |
| 3245 | |
Jeff Garzik | 5e4009b | 2006-10-04 05:32:54 -0400 | [diff] [blame] | 3246 | err = class_register(&sd_disk_class); |
| 3247 | if (err) |
| 3248 | goto err_out; |
James Bottomley | 6bdaa1f | 2006-03-18 14:14:21 -0600 | [diff] [blame] | 3249 | |
Martin K. Petersen | 4e7392e | 2009-09-20 16:49:38 -0400 | [diff] [blame] | 3250 | sd_cdb_cache = kmem_cache_create("sd_ext_cdb", SD_EXT_CDB_SIZE, |
| 3251 | 0, 0, NULL); |
| 3252 | if (!sd_cdb_cache) { |
| 3253 | printk(KERN_ERR "sd: can't init extended cdb cache\n"); |
Clément Calmels | 8d96447 | 2014-06-03 23:34:25 +0200 | [diff] [blame] | 3254 | err = -ENOMEM; |
Martin K. Petersen | 4e7392e | 2009-09-20 16:49:38 -0400 | [diff] [blame] | 3255 | goto err_out_class; |
| 3256 | } |
| 3257 | |
| 3258 | sd_cdb_pool = mempool_create_slab_pool(SD_MEMPOOL_SIZE, sd_cdb_cache); |
| 3259 | if (!sd_cdb_pool) { |
| 3260 | printk(KERN_ERR "sd: can't init extended cdb pool\n"); |
Clément Calmels | 8d96447 | 2014-06-03 23:34:25 +0200 | [diff] [blame] | 3261 | err = -ENOMEM; |
Martin K. Petersen | 4e7392e | 2009-09-20 16:49:38 -0400 | [diff] [blame] | 3262 | goto err_out_cache; |
| 3263 | } |
| 3264 | |
Joel D. Diaz | afd5e34 | 2012-10-10 10:36:11 +0200 | [diff] [blame] | 3265 | err = scsi_register_driver(&sd_template.gendrv); |
| 3266 | if (err) |
| 3267 | goto err_out_driver; |
| 3268 | |
Jeff Garzik | 5e4009b | 2006-10-04 05:32:54 -0400 | [diff] [blame] | 3269 | return 0; |
| 3270 | |
Joel D. Diaz | afd5e34 | 2012-10-10 10:36:11 +0200 | [diff] [blame] | 3271 | err_out_driver: |
| 3272 | mempool_destroy(sd_cdb_pool); |
| 3273 | |
Martin K. Petersen | 4e7392e | 2009-09-20 16:49:38 -0400 | [diff] [blame] | 3274 | err_out_cache: |
| 3275 | kmem_cache_destroy(sd_cdb_cache); |
| 3276 | |
Jeff Garzik | 5e4009b | 2006-10-04 05:32:54 -0400 | [diff] [blame] | 3277 | err_out_class: |
| 3278 | class_unregister(&sd_disk_class); |
| 3279 | err_out: |
| 3280 | for (i = 0; i < SD_MAJORS; i++) |
| 3281 | unregister_blkdev(sd_major(i), "sd"); |
| 3282 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3283 | } |
| 3284 | |
| 3285 | /** |
| 3286 | * exit_sd - exit point for this driver (when it is a module). |
| 3287 | * |
| 3288 | * Note: this function unregisters this driver from the scsi mid-level. |
| 3289 | **/ |
| 3290 | static void __exit exit_sd(void) |
| 3291 | { |
| 3292 | int i; |
| 3293 | |
| 3294 | SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n")); |
| 3295 | |
Joel D. Diaz | afd5e34 | 2012-10-10 10:36:11 +0200 | [diff] [blame] | 3296 | scsi_unregister_driver(&sd_template.gendrv); |
Martin K. Petersen | 4e7392e | 2009-09-20 16:49:38 -0400 | [diff] [blame] | 3297 | mempool_destroy(sd_cdb_pool); |
| 3298 | kmem_cache_destroy(sd_cdb_cache); |
| 3299 | |
Jeff Garzik | 5e4009b | 2006-10-04 05:32:54 -0400 | [diff] [blame] | 3300 | class_unregister(&sd_disk_class); |
| 3301 | |
Hannes Reinecke | 0761df9 | 2013-05-10 11:06:16 +0200 | [diff] [blame] | 3302 | for (i = 0; i < SD_MAJORS; i++) { |
| 3303 | blk_unregister_region(sd_major(i), SD_MINORS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3304 | unregister_blkdev(sd_major(i), "sd"); |
Hannes Reinecke | 0761df9 | 2013-05-10 11:06:16 +0200 | [diff] [blame] | 3305 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3306 | } |
| 3307 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3308 | module_init(init_sd); |
| 3309 | module_exit(exit_sd); |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 3310 | |
| 3311 | static void sd_print_sense_hdr(struct scsi_disk *sdkp, |
| 3312 | struct scsi_sense_hdr *sshdr) |
| 3313 | { |
Hannes Reinecke | 2104551 | 2015-01-08 07:43:46 +0100 | [diff] [blame] | 3314 | scsi_print_sense_hdr(sdkp->device, |
| 3315 | sdkp->disk ? sdkp->disk->disk_name : NULL, sshdr); |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 3316 | } |
| 3317 | |
Hannes Reinecke | ef61329 | 2014-10-24 14:27:00 +0200 | [diff] [blame] | 3318 | static void sd_print_result(const struct scsi_disk *sdkp, const char *msg, |
| 3319 | int result) |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 3320 | { |
Hannes Reinecke | ef61329 | 2014-10-24 14:27:00 +0200 | [diff] [blame] | 3321 | const char *hb_string = scsi_hostbyte_string(result); |
| 3322 | const char *db_string = scsi_driverbyte_string(result); |
| 3323 | |
| 3324 | if (hb_string || db_string) |
| 3325 | sd_printk(KERN_INFO, sdkp, |
| 3326 | "%s: Result: hostbyte=%s driverbyte=%s\n", msg, |
| 3327 | hb_string ? hb_string : "invalid", |
| 3328 | db_string ? db_string : "invalid"); |
| 3329 | else |
| 3330 | sd_printk(KERN_INFO, sdkp, |
| 3331 | "%s: Result: hostbyte=0x%02x driverbyte=0x%02x\n", |
| 3332 | msg, host_byte(result), driver_byte(result)); |
Martin K. Petersen | e73aec8 | 2007-02-27 22:40:55 -0500 | [diff] [blame] | 3333 | } |
| 3334 | |