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Merge branch 'for-next' into for-linus
[linux-2.6-block.git] / drivers / scsi / sd.c
CommitLineData
09c434b8 1// SPDX-License-Identifier: GPL-2.0-only
1da177e4
LT		 2/*
3 * sd.c Copyright (C) 1992 Drew Eckhardt
4 * Copyright (C) 1993, 1994, 1995, 1999 Eric Youngdale
5 *
6 * Linux scsi disk driver
7 * Initial versions: Drew Eckhardt
8 * Subsequent revisions: Eric Youngdale
9 * Modification history:
10 * - Drew Eckhardt <drew@colorado.edu> original
11 * - Eric Youngdale <eric@andante.org> add scatter-gather, multiple
12 * outstanding request, and other enhancements.
13 * Support loadable low-level scsi drivers.
14 * - Jirka Hanika <geo@ff.cuni.cz> support more scsi disks using
15 * eight major numbers.
16 * - Richard Gooch <rgooch@atnf.csiro.au> support devfs.
17 * - Torben Mathiasen <tmm@image.dk> Resource allocation fixes in
18 * sd_init and cleanups.
19 * - Alex Davis <letmein@erols.com> Fix problem where partition info
20 * not being read in sd_open. Fix problem where removable media
21 * could be ejected after sd_open.
22 * - Douglas Gilbert <dgilbert@interlog.com> cleanup for lk 2.5.x
23 * - Badari Pulavarty <pbadari@us.ibm.com>, Matthew Wilcox
24 * <willy@debian.org>, Kurt Garloff <garloff@suse.de>:
25 * Support 32k/1M disks.
26 *
27 * Logging policy (needs CONFIG_SCSI_LOGGING defined):
28 * - setting up transfer: SCSI_LOG_HLQUEUE levels 1 and 2
29 * - end of transfer (bh + scsi_lib): SCSI_LOG_HLCOMPLETE level 1
30 * - entering sd_ioctl: SCSI_LOG_IOCTL level 1
31 * - entering other commands: SCSI_LOG_HLQUEUE level 3
32 * Note: when the logging level is set by the user, it must be greater
33 * than the level indicated above to trigger output.
34 */
35
1da177e4
LT		 36#include <linux/module.h>
37#include <linux/fs.h>
38#include <linux/kernel.h>
1da177e4
LT		 39#include <linux/mm.h>
40#include <linux/bio.h>
1da177e4
LT		 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>
bca6b067 48#include <linux/blk-pm.h>
1da177e4 49#include <linux/delay.h>
b81e0c23 50#include <linux/major.h>
0b950672 51#include <linux/mutex.h>
7404ad3b 52#include <linux/string_helpers.h>
5a0e3ad6 53#include <linux/slab.h>
d80210f2 54#include <linux/sed-opal.h>
54f57588 55#include <linux/pm_runtime.h>
924d55b0 56#include <linux/pr.h>
8475c811 57#include <linux/t10-pi.h>
7c0f6ba6 58#include <linux/uaccess.h>
8f76d151 59#include <asm/unaligned.h>
1da177e4
LT		 60
61#include <scsi/scsi.h>
62#include <scsi/scsi_cmnd.h>
63#include <scsi/scsi_dbg.h>
64#include <scsi/scsi_device.h>
65#include <scsi/scsi_driver.h>
66#include <scsi/scsi_eh.h>
67#include <scsi/scsi_host.h>
68#include <scsi/scsi_ioctl.h>
1da177e4 69#include <scsi/scsicam.h>
0730b163 70#include <scsi/scsi_common.h>
1da177e4 71
aa91696e 72#include "sd.h"
a7a20d10 73#include "scsi_priv.h"
1da177e4
LT		 74#include "scsi_logging.h"
75
f018fa55
RH		 76MODULE_AUTHOR("Eric Youngdale");
77MODULE_DESCRIPTION("SCSI disk (sd) driver");
78MODULE_LICENSE("GPL");
79
80MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK0_MAJOR);
81MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK1_MAJOR);
82MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK2_MAJOR);
83MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK3_MAJOR);
84MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK4_MAJOR);
85MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK5_MAJOR);
86MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK6_MAJOR);
87MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK7_MAJOR);
88MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK8_MAJOR);
89MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK9_MAJOR);
90MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK10_MAJOR);
91MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK11_MAJOR);
92MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK12_MAJOR);
93MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK13_MAJOR);
94MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK14_MAJOR);
95MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK15_MAJOR);
d7b8bcb0
MT		 96MODULE_ALIAS_SCSI_DEVICE(TYPE_DISK);
97MODULE_ALIAS_SCSI_DEVICE(TYPE_MOD);
98MODULE_ALIAS_SCSI_DEVICE(TYPE_RBC);
89d94756 99MODULE_ALIAS_SCSI_DEVICE(TYPE_ZBC);
f018fa55 100
f615b48c 101#define SD_MINORS 16
870d6656 102
c98a0eb0 103static void sd_config_discard(struct scsi_disk *, unsigned int);
5db44863 104static void sd_config_write_same(struct scsi_disk *);
7b3d9545 105static int sd_revalidate_disk(struct gendisk *);
72ec24bd 106static void sd_unlock_native_capacity(struct gendisk *disk);
7b3d9545
LT		 107static int sd_probe(struct device *);
108static int sd_remove(struct device *);
109static void sd_shutdown(struct device *);
95897910
ON		 110static int sd_suspend_system(struct device *);
111static int sd_suspend_runtime(struct device *);
1c957532 112static int sd_resume_system(struct device *);
ed4246d3 113static int sd_resume_runtime(struct device *);
7b3d9545 114static void sd_rescan(struct device *);
159b2cbf 115static blk_status_t sd_init_command(struct scsi_cmnd *SCpnt);
a1b73fc1 116static void sd_uninit_command(struct scsi_cmnd *SCpnt);
7b3d9545 117static int sd_done(struct scsi_cmnd *);
7a38dc0b 118static void sd_eh_reset(struct scsi_cmnd *);
2451079b 119static int sd_eh_action(struct scsi_cmnd *, int);
7b3d9545 120static void sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer);
ee959b00 121static void scsi_disk_release(struct device *cdev);
7b3d9545 122
f27bac27 123static DEFINE_IDA(sd_index_ida);
1da177e4 124
61cce6f6 125static mempool_t *sd_page_pool;
9c2b9dba 126static struct lock_class_key sd_bio_compl_lkclass;
4e7392ec 127
6bdaa1f1
JB		 128static const char *sd_cache_types[] = {
129 "write through", "none", "write back",
130 "write back, no read (daft)"
131};
132
cb2fb68d
VC		 133static void sd_set_flush_flag(struct scsi_disk *sdkp)
134{
eb310e23 135 bool wc = false, fua = false;
cb2fb68d
VC		 136
137 if (sdkp->WCE) {
eb310e23 138 wc = true;
cb2fb68d 139 if (sdkp->DPOFUA)
eb310e23 140 fua = true;
cb2fb68d
VC		 141 }
142
eb310e23 143 blk_queue_write_cache(sdkp->disk->queue, wc, fua);
cb2fb68d
VC		 144}
145
ee959b00 146static ssize_t
e1ea2351
GKH		 147cache_type_store(struct device *dev, struct device_attribute *attr,
148 const char *buf, size_t count)
6bdaa1f1 149{
4c11712a 150 int ct, rcd, wce, sp;
ee959b00 151 struct scsi_disk *sdkp = to_scsi_disk(dev);
6bdaa1f1
JB		 152 struct scsi_device *sdp = sdkp->device;
153 char buffer[64];
154 char *buffer_data;
155 struct scsi_mode_data data;
156 struct scsi_sense_hdr sshdr;
2ee3e26c 157 static const char temp[] = "temporary ";
6bdaa1f1
JB		 158 int len;
159
89d94756 160 if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC)
6bdaa1f1
JB		 161 /* no cache control on RBC devices; theoretically they
162 * can do it, but there's probably so many exceptions
163 * it's not worth the risk */
164 return -EINVAL;
165
39c60a09
JB		 166 if (strncmp(buf, temp, sizeof(temp) - 1) == 0) {
167 buf += sizeof(temp) - 1;
168 sdkp->cache_override = 1;
169 } else {
170 sdkp->cache_override = 0;
171 }
172
4c11712a 173 ct = sysfs_match_string(sd_cache_types, buf);
6bdaa1f1
JB		 174 if (ct < 0)
175 return -EINVAL;
4c11712a 176
6bdaa1f1 177 rcd = ct & 0x01 ? 1 : 0;
2eefd57b 178 wce = (ct & 0x02) && !sdkp->write_prot ? 1 : 0;
39c60a09
JB		 179
180 if (sdkp->cache_override) {
181 sdkp->WCE = wce;
182 sdkp->RCD = rcd;
cb2fb68d 183 sd_set_flush_flag(sdkp);
39c60a09
JB		 184 return count;
185 }
186
a6cdc35f 187 if (scsi_mode_sense(sdp, 0x08, 8, 0, buffer, sizeof(buffer), SD_TIMEOUT,
0610959f 188 sdkp->max_retries, &data, NULL))
6bdaa1f1 189 return -EINVAL;
a9312fb8 190 len = min_t(size_t, sizeof(buffer), data.length - data.header_length -
6bdaa1f1
JB		 191 data.block_descriptor_length);
192 buffer_data = buffer + data.header_length +
193 data.block_descriptor_length;
194 buffer_data[2] &= ~0x05;
195 buffer_data[2] |= wce << 2 | rcd;
196 sp = buffer_data[0] & 0x80 ? 1 : 0;
2c5d16d6 197 buffer_data[0] &= ~0x80;
6bdaa1f1 198
44759979
IM		 199 /*
200 * Ensure WP, DPOFUA, and RESERVED fields are cleared in
201 * received mode parameter buffer before doing MODE SELECT.
202 */
203 data.device_specific = 0;
204
81d3f500 205 if (scsi_mode_select(sdp, 1, sp, buffer_data, len, SD_TIMEOUT,
0610959f 206 sdkp->max_retries, &data, &sshdr)) {
6bdaa1f1 207 if (scsi_sense_valid(&sshdr))
e73aec82 208 sd_print_sense_hdr(sdkp, &sshdr);
6bdaa1f1
JB		 209 return -EINVAL;
210 }
033a1b98 211 sd_revalidate_disk(sdkp->disk);
6bdaa1f1
JB		 212 return count;
213}
214
ee959b00 215static ssize_t
e1ea2351
GKH		 216manage_start_stop_show(struct device *dev, struct device_attribute *attr,
217 char *buf)
218{
219 struct scsi_disk *sdkp = to_scsi_disk(dev);
220 struct scsi_device *sdp = sdkp->device;
221
4c11712a 222 return sprintf(buf, "%u\n", sdp->manage_start_stop);
e1ea2351
GKH		 223}
224
225static ssize_t
226manage_start_stop_store(struct device *dev, struct device_attribute *attr,
227 const char *buf, size_t count)
c3c94c5a 228{
ee959b00 229 struct scsi_disk *sdkp = to_scsi_disk(dev);
c3c94c5a 230 struct scsi_device *sdp = sdkp->device;
623401ee 231 bool v;
c3c94c5a
TH		 232
233 if (!capable(CAP_SYS_ADMIN))
234 return -EACCES;
235
623401ee 236 if (kstrtobool(buf, &v))
237 return -EINVAL;
238
239 sdp->manage_start_stop = v;
c3c94c5a
TH		 240
241 return count;
242}
e1ea2351 243static DEVICE_ATTR_RW(manage_start_stop);
c3c94c5a 244
ee959b00 245static ssize_t
e1ea2351
GKH		 246allow_restart_show(struct device *dev, struct device_attribute *attr, char *buf)
247{
248 struct scsi_disk *sdkp = to_scsi_disk(dev);
249
4c11712a 250 return sprintf(buf, "%u\n", sdkp->device->allow_restart);
e1ea2351
GKH		 251}
252
253static ssize_t
254allow_restart_store(struct device *dev, struct device_attribute *attr,
255 const char *buf, size_t count)
a144c5ae 256{
658e9a6d 257 bool v;
ee959b00 258 struct scsi_disk *sdkp = to_scsi_disk(dev);
a144c5ae
BK		 259 struct scsi_device *sdp = sdkp->device;
260
261 if (!capable(CAP_SYS_ADMIN))
262 return -EACCES;
263
89d94756 264 if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC)
a144c5ae
BK		 265 return -EINVAL;
266
658e9a6d 267 if (kstrtobool(buf, &v))
268 return -EINVAL;
269
270 sdp->allow_restart = v;
a144c5ae
BK		 271
272 return count;
273}
e1ea2351 274static DEVICE_ATTR_RW(allow_restart);
a144c5ae 275
ee959b00 276static ssize_t
e1ea2351 277cache_type_show(struct device *dev, struct device_attribute *attr, char *buf)
6bdaa1f1 278{
ee959b00 279 struct scsi_disk *sdkp = to_scsi_disk(dev);
6bdaa1f1
JB		 280 int ct = sdkp->RCD + 2*sdkp->WCE;
281
4c11712a 282 return sprintf(buf, "%s\n", sd_cache_types[ct]);
6bdaa1f1 283}
e1ea2351 284static DEVICE_ATTR_RW(cache_type);
6bdaa1f1 285
ee959b00 286static ssize_t
e1ea2351 287FUA_show(struct device *dev, struct device_attribute *attr, char *buf)
6bdaa1f1 288{
ee959b00 289 struct scsi_disk *sdkp = to_scsi_disk(dev);
6bdaa1f1 290
4c11712a 291 return sprintf(buf, "%u\n", sdkp->DPOFUA);
6bdaa1f1 292}
e1ea2351 293static DEVICE_ATTR_RO(FUA);
6bdaa1f1 294
ee959b00 295static ssize_t
e1ea2351
GKH		 296protection_type_show(struct device *dev, struct device_attribute *attr,
297 char *buf)
e0597d70
MP		 298{
299 struct scsi_disk *sdkp = to_scsi_disk(dev);
300
4c11712a 301 return sprintf(buf, "%u\n", sdkp->protection_type);
e0597d70
MP		 302}
303
8172499a 304static ssize_t
e1ea2351
GKH		 305protection_type_store(struct device *dev, struct device_attribute *attr,
306 const char *buf, size_t count)
8172499a
MP		 307{
308 struct scsi_disk *sdkp = to_scsi_disk(dev);
309 unsigned int val;
310 int err;
311
312 if (!capable(CAP_SYS_ADMIN))
313 return -EACCES;
314
315 err = kstrtouint(buf, 10, &val);
316
317 if (err)
318 return err;
319
830cc351 320 if (val <= T10_PI_TYPE3_PROTECTION)
8172499a
MP		 321 sdkp->protection_type = val;
322
323 return count;
324}
e1ea2351 325static DEVICE_ATTR_RW(protection_type);
8172499a 326
518fa8e3 327static ssize_t
e1ea2351
GKH		 328protection_mode_show(struct device *dev, struct device_attribute *attr,
329 char *buf)
518fa8e3
MP		 330{
331 struct scsi_disk *sdkp = to_scsi_disk(dev);
332 struct scsi_device *sdp = sdkp->device;
333 unsigned int dif, dix;
334
335 dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type);
336 dix = scsi_host_dix_capable(sdp->host, sdkp->protection_type);
337
8475c811 338 if (!dix && scsi_host_dix_capable(sdp->host, T10_PI_TYPE0_PROTECTION)) {
518fa8e3
MP		 339 dif = 0;
340 dix = 1;
341 }
342
343 if (!dif && !dix)
4c11712a 344 return sprintf(buf, "none\n");
518fa8e3 345
4c11712a 346 return sprintf(buf, "%s%u\n", dix ? "dix" : "dif", dif);
518fa8e3 347}
e1ea2351 348static DEVICE_ATTR_RO(protection_mode);
518fa8e3 349
e0597d70 350static ssize_t
e1ea2351 351app_tag_own_show(struct device *dev, struct device_attribute *attr, char *buf)
e0597d70
MP		 352{
353 struct scsi_disk *sdkp = to_scsi_disk(dev);
354
4c11712a 355 return sprintf(buf, "%u\n", sdkp->ATO);
e0597d70 356}
e1ea2351 357static DEVICE_ATTR_RO(app_tag_own);
e0597d70 358
e339c1a7 359static ssize_t
e1ea2351
GKH		 360thin_provisioning_show(struct device *dev, struct device_attribute *attr,
361 char *buf)
e339c1a7
MP		 362{
363 struct scsi_disk *sdkp = to_scsi_disk(dev);
364
4c11712a 365 return sprintf(buf, "%u\n", sdkp->lbpme);
c98a0eb0 366}
e1ea2351 367static DEVICE_ATTR_RO(thin_provisioning);
c98a0eb0 368
4c11712a 369/* sysfs_match_string() requires dense arrays */
c98a0eb0
MP		 370static const char *lbp_mode[] = {
371 [SD_LBP_FULL] = "full",
372 [SD_LBP_UNMAP] = "unmap",
373 [SD_LBP_WS16] = "writesame_16",
374 [SD_LBP_WS10] = "writesame_10",
375 [SD_LBP_ZERO] = "writesame_zero",
376 [SD_LBP_DISABLE] = "disabled",
377};
378
379static ssize_t
e1ea2351
GKH		 380provisioning_mode_show(struct device *dev, struct device_attribute *attr,
381 char *buf)
c98a0eb0
MP		 382{
383 struct scsi_disk *sdkp = to_scsi_disk(dev);
384
4c11712a 385 return sprintf(buf, "%s\n", lbp_mode[sdkp->provisioning_mode]);
c98a0eb0
MP		 386}
387
388static ssize_t
e1ea2351
GKH		 389provisioning_mode_store(struct device *dev, struct device_attribute *attr,
390 const char *buf, size_t count)
c98a0eb0
MP		 391{
392 struct scsi_disk *sdkp = to_scsi_disk(dev);
393 struct scsi_device *sdp = sdkp->device;
4c11712a 394 int mode;
c98a0eb0
MP		 395
396 if (!capable(CAP_SYS_ADMIN))
397 return -EACCES;
398
89d94756
HR		 399 if (sd_is_zoned(sdkp)) {
400 sd_config_discard(sdkp, SD_LBP_DISABLE);
401 return count;
402 }
403
c98a0eb0
MP		 404 if (sdp->type != TYPE_DISK)
405 return -EINVAL;
406
4c11712a
MP		 407 mode = sysfs_match_string(lbp_mode, buf);
408 if (mode < 0)
c98a0eb0
MP		 409 return -EINVAL;
410
4c11712a
MP		 411 sd_config_discard(sdkp, mode);
412
c98a0eb0 413 return count;
e339c1a7 414}
e1ea2351 415static DEVICE_ATTR_RW(provisioning_mode);
e339c1a7 416
4c11712a 417/* sysfs_match_string() requires dense arrays */
e6bd9312
MP		 418static const char *zeroing_mode[] = {
419 [SD_ZERO_WRITE] = "write",
420 [SD_ZERO_WS] = "writesame",
421 [SD_ZERO_WS16_UNMAP] = "writesame_16_unmap",
422 [SD_ZERO_WS10_UNMAP] = "writesame_10_unmap",
423};
424
425static ssize_t
426zeroing_mode_show(struct device *dev, struct device_attribute *attr,
427 char *buf)
428{
429 struct scsi_disk *sdkp = to_scsi_disk(dev);
430
4c11712a 431 return sprintf(buf, "%s\n", zeroing_mode[sdkp->zeroing_mode]);
e6bd9312
MP		 432}
433
434static ssize_t
435zeroing_mode_store(struct device *dev, struct device_attribute *attr,
436 const char *buf, size_t count)
437{
438 struct scsi_disk *sdkp = to_scsi_disk(dev);
4c11712a 439 int mode;
e6bd9312
MP		 440
441 if (!capable(CAP_SYS_ADMIN))
442 return -EACCES;
443
4c11712a
MP		 444 mode = sysfs_match_string(zeroing_mode, buf);
445 if (mode < 0)
e6bd9312
MP		 446 return -EINVAL;
447
4c11712a
MP		 448 sdkp->zeroing_mode = mode;
449
e6bd9312
MP		 450 return count;
451}
452static DEVICE_ATTR_RW(zeroing_mode);
453
18a4d0a2 454static ssize_t
e1ea2351
GKH		 455max_medium_access_timeouts_show(struct device *dev,
456 struct device_attribute *attr, char *buf)
18a4d0a2
MP		 457{
458 struct scsi_disk *sdkp = to_scsi_disk(dev);
459
4c11712a 460 return sprintf(buf, "%u\n", sdkp->max_medium_access_timeouts);
18a4d0a2
MP		 461}
462
463static ssize_t
e1ea2351
GKH		 464max_medium_access_timeouts_store(struct device *dev,
465 struct device_attribute *attr, const char *buf,
466 size_t count)
18a4d0a2
MP		 467{
468 struct scsi_disk *sdkp = to_scsi_disk(dev);
469 int err;
470
471 if (!capable(CAP_SYS_ADMIN))
472 return -EACCES;
473
474 err = kstrtouint(buf, 10, &sdkp->max_medium_access_timeouts);
475
476 return err ? err : count;
477}
e1ea2351 478static DEVICE_ATTR_RW(max_medium_access_timeouts);
18a4d0a2 479
5db44863 480static ssize_t
e1ea2351
GKH		 481max_write_same_blocks_show(struct device *dev, struct device_attribute *attr,
482 char *buf)
5db44863
MP		 483{
484 struct scsi_disk *sdkp = to_scsi_disk(dev);
485
4c11712a 486 return sprintf(buf, "%u\n", sdkp->max_ws_blocks);
5db44863
MP		 487}
488
489static ssize_t
e1ea2351
GKH		 490max_write_same_blocks_store(struct device *dev, struct device_attribute *attr,
491 const char *buf, size_t count)
5db44863
MP		 492{
493 struct scsi_disk *sdkp = to_scsi_disk(dev);
494 struct scsi_device *sdp = sdkp->device;
495 unsigned long max;
496 int err;
497
498 if (!capable(CAP_SYS_ADMIN))
499 return -EACCES;
500
89d94756 501 if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC)
5db44863
MP		 502 return -EINVAL;
503
504 err = kstrtoul(buf, 10, &max);
505
506 if (err)
507 return err;
508
509 if (max == 0)
510 sdp->no_write_same = 1;
66c28f97
MP		 511 else if (max <= SD_MAX_WS16_BLOCKS) {
512 sdp->no_write_same = 0;
5db44863 513 sdkp->max_ws_blocks = max;
66c28f97 514 }
5db44863
MP		 515
516 sd_config_write_same(sdkp);
517
518 return count;
519}
e1ea2351
GKH		 520static DEVICE_ATTR_RW(max_write_same_blocks);
521
c5f88522
DLM		 522static ssize_t
523zoned_cap_show(struct device *dev, struct device_attribute *attr, char *buf)
524{
525 struct scsi_disk *sdkp = to_scsi_disk(dev);
526
527 if (sdkp->device->type == TYPE_ZBC)
528 return sprintf(buf, "host-managed\n");
529 if (sdkp->zoned == 1)
530 return sprintf(buf, "host-aware\n");
531 if (sdkp->zoned == 2)
532 return sprintf(buf, "drive-managed\n");
533 return sprintf(buf, "none\n");
534}
535static DEVICE_ATTR_RO(zoned_cap);
536
0610959f
MC		 537static ssize_t
538max_retries_store(struct device *dev, struct device_attribute *attr,
539 const char *buf, size_t count)
540{
541 struct scsi_disk *sdkp = to_scsi_disk(dev);
542 struct scsi_device *sdev = sdkp->device;
543 int retries, err;
544
545 err = kstrtoint(buf, 10, &retries);
546 if (err)
547 return err;
548
549 if (retries == SCSI_CMD_RETRIES_NO_LIMIT || retries <= SD_MAX_RETRIES) {
550 sdkp->max_retries = retries;
551 return count;
552 }
553
554 sdev_printk(KERN_ERR, sdev, "max_retries must be between -1 and %d\n",
555 SD_MAX_RETRIES);
556 return -EINVAL;
557}
558
559static ssize_t
560max_retries_show(struct device *dev, struct device_attribute *attr,
561 char *buf)
562{
563 struct scsi_disk *sdkp = to_scsi_disk(dev);
564
565 return sprintf(buf, "%d\n", sdkp->max_retries);
566}
567
568static DEVICE_ATTR_RW(max_retries);
569
e1ea2351
GKH		 570static struct attribute *sd_disk_attrs[] = {
571 &dev_attr_cache_type.attr,
572 &dev_attr_FUA.attr,
573 &dev_attr_allow_restart.attr,
574 &dev_attr_manage_start_stop.attr,
575 &dev_attr_protection_type.attr,
576 &dev_attr_protection_mode.attr,
577 &dev_attr_app_tag_own.attr,
578 &dev_attr_thin_provisioning.attr,
579 &dev_attr_provisioning_mode.attr,
e6bd9312 580 &dev_attr_zeroing_mode.attr,
e1ea2351
GKH		 581 &dev_attr_max_write_same_blocks.attr,
582 &dev_attr_max_medium_access_timeouts.attr,
c5f88522 583 &dev_attr_zoned_cap.attr,
0610959f 584 &dev_attr_max_retries.attr,
e1ea2351 585 NULL,
6bdaa1f1 586};
e1ea2351 587ATTRIBUTE_GROUPS(sd_disk);
6bdaa1f1
JB		 588
589static struct class sd_disk_class = {
590 .name = "scsi_disk",
ee959b00 591 .dev_release = scsi_disk_release,
e1ea2351 592 .dev_groups = sd_disk_groups,
6bdaa1f1 593};
1da177e4 594
691e3d31 595static const struct dev_pm_ops sd_pm_ops = {
95897910 596 .suspend = sd_suspend_system,
1c957532 597 .resume = sd_resume_system,
95897910 598 .poweroff = sd_suspend_system,
1c957532 599 .restore = sd_resume_system,
95897910 600 .runtime_suspend = sd_suspend_runtime,
ed4246d3 601 .runtime_resume = sd_resume_runtime,
691e3d31
AL		 602};
603
1da177e4 604static struct scsi_driver sd_template = {
1da177e4
LT		 605 .gendrv = {
606 .name = "sd",
3af6b352 607 .owner = THIS_MODULE,
1da177e4 608 .probe = sd_probe,
f049cf1a 609 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
1da177e4
LT		 610 .remove = sd_remove,
611 .shutdown = sd_shutdown,
691e3d31 612 .pm = &sd_pm_ops,
1da177e4
LT		 613 },
614 .rescan = sd_rescan,
a1b73fc1
CH		 615 .init_command = sd_init_command,
616 .uninit_command = sd_uninit_command,
7b3d9545 617 .done = sd_done,
18a4d0a2 618 .eh_action = sd_eh_action,
7a38dc0b 619 .eh_reset = sd_eh_reset,
1da177e4
LT		 620};
621
0761df9c 622/*
996e509b
CH		 623 * Don't request a new module, as that could deadlock in multipath
624 * environment.
0761df9c 625 */
996e509b 626static void sd_default_probe(dev_t devt)
0761df9c 627{
0761df9c
HR		 628}
629
1da177e4
LT		 630/*
631 * Device no to disk mapping:
632 *
633 * major disc2 disc p1
634 * |............|.............|....|....| <- dev_t
635 * 31 20 19 8 7 4 3 0
636 *
637 * Inside a major, we have 16k disks, however mapped non-
638 * contiguously. The first 16 disks are for major0, the next
639 * ones with major1, ... Disk 256 is for major0 again, disk 272
640 * for major1, ...
641 * As we stay compatible with our numbering scheme, we can reuse
642 * the well-know SCSI majors 8, 65--71, 136--143.
643 */
644static int sd_major(int major_idx)
645{
646 switch (major_idx) {
647 case 0:
648 return SCSI_DISK0_MAJOR;
649 case 1 ... 7:
650 return SCSI_DISK1_MAJOR + major_idx - 1;
651 case 8 ... 15:
652 return SCSI_DISK8_MAJOR + major_idx - 8;
653 default:
654 BUG();
655 return 0; /* shut up gcc */
656 }
657}
658
d80210f2
CH		 659#ifdef CONFIG_BLK_SED_OPAL
660static int sd_sec_submit(void *data, u16 spsp, u8 secp, void *buffer,
661 size_t len, bool send)
662{
0610959f
MC		 663 struct scsi_disk *sdkp = data;
664 struct scsi_device *sdev = sdkp->device;
d80210f2 665 u8 cdb[12] = { 0, };
af16cd63
MC		 666 const struct scsi_exec_args exec_args = {
667 .req_flags = BLK_MQ_REQ_PM,
668 };
d80210f2
CH		 669 int ret;
670
671 cdb[0] = send ? SECURITY_PROTOCOL_OUT : SECURITY_PROTOCOL_IN;
672 cdb[1] = secp;
673 put_unaligned_be16(spsp, &cdb[2]);
674 put_unaligned_be32(len, &cdb[6]);
675
af16cd63
MC		 676 ret = scsi_execute_cmd(sdev, cdb, send ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN,
677 buffer, len, SD_TIMEOUT, sdkp->max_retries,
678 &exec_args);
d80210f2
CH		 679 return ret <= 0 ? ret : -EIO;
680}
681#endif /* CONFIG_BLK_SED_OPAL */
682
082c2cd2
JG		 683/*
684 * Look up the DIX operation based on whether the command is read or
685 * write and whether dix and dif are enabled.
686 */
687static unsigned int sd_prot_op(bool write, bool dix, bool dif)
688{
689 /* Lookup table: bit 2 (write), bit 1 (dix), bit 0 (dif) */
690 static const unsigned int ops[] = { /* wrt dix dif */
691 SCSI_PROT_NORMAL, /* 0 0 0 */
692 SCSI_PROT_READ_STRIP, /* 0 0 1 */
693 SCSI_PROT_READ_INSERT, /* 0 1 0 */
694 SCSI_PROT_READ_PASS, /* 0 1 1 */
695 SCSI_PROT_NORMAL, /* 1 0 0 */
696 SCSI_PROT_WRITE_INSERT, /* 1 0 1 */
697 SCSI_PROT_WRITE_STRIP, /* 1 1 0 */
698 SCSI_PROT_WRITE_PASS, /* 1 1 1 */
699 };
700
701 return ops[write << 2 | dix << 1 | dif];
702}
703
704/*
705 * Returns a mask of the protection flags that are valid for a given DIX
706 * operation.
707 */
708static unsigned int sd_prot_flag_mask(unsigned int prot_op)
709{
710 static const unsigned int flag_mask[] = {
711 [SCSI_PROT_NORMAL] = 0,
712
713 [SCSI_PROT_READ_STRIP] = SCSI_PROT_TRANSFER_PI |
714 SCSI_PROT_GUARD_CHECK |
715 SCSI_PROT_REF_CHECK |
716 SCSI_PROT_REF_INCREMENT,
717
718 [SCSI_PROT_READ_INSERT] = SCSI_PROT_REF_INCREMENT |
719 SCSI_PROT_IP_CHECKSUM,
720
721 [SCSI_PROT_READ_PASS] = SCSI_PROT_TRANSFER_PI |
722 SCSI_PROT_GUARD_CHECK |
723 SCSI_PROT_REF_CHECK |
724 SCSI_PROT_REF_INCREMENT |
725 SCSI_PROT_IP_CHECKSUM,
726
727 [SCSI_PROT_WRITE_INSERT] = SCSI_PROT_TRANSFER_PI |
728 SCSI_PROT_REF_INCREMENT,
729
730 [SCSI_PROT_WRITE_STRIP] = SCSI_PROT_GUARD_CHECK |
731 SCSI_PROT_REF_CHECK |
732 SCSI_PROT_REF_INCREMENT |
733 SCSI_PROT_IP_CHECKSUM,
734
735 [SCSI_PROT_WRITE_PASS] = SCSI_PROT_TRANSFER_PI |
736 SCSI_PROT_GUARD_CHECK |
737 SCSI_PROT_REF_CHECK |
738 SCSI_PROT_REF_INCREMENT |
739 SCSI_PROT_IP_CHECKSUM,
740 };
741
742 return flag_mask[prot_op];
743}
744
c611529e
MP		 745static unsigned char sd_setup_protect_cmnd(struct scsi_cmnd *scmd,
746 unsigned int dix, unsigned int dif)
35e1a5d9 747{
5999ccff
BVA		 748 struct request *rq = scsi_cmd_to_rq(scmd);
749 struct bio *bio = rq->bio;
750 unsigned int prot_op = sd_prot_op(rq_data_dir(rq), dix, dif);
c611529e
MP		 751 unsigned int protect = 0;
752
753 if (dix) { /* DIX Type 0, 1, 2, 3 */
754 if (bio_integrity_flagged(bio, BIP_IP_CHECKSUM))
755 scmd->prot_flags |= SCSI_PROT_IP_CHECKSUM;
756
757 if (bio_integrity_flagged(bio, BIP_CTRL_NOCHECK) == false)
758 scmd->prot_flags |= SCSI_PROT_GUARD_CHECK;
759 }
760
8475c811 761 if (dif != T10_PI_TYPE3_PROTECTION) { /* DIX/DIF Type 0, 1, 2 */
c611529e
MP		 762 scmd->prot_flags |= SCSI_PROT_REF_INCREMENT;
763
764 if (bio_integrity_flagged(bio, BIP_CTRL_NOCHECK) == false)
765 scmd->prot_flags |= SCSI_PROT_REF_CHECK;
766 }
767
768 if (dif) { /* DIX/DIF Type 1, 2, 3 */
769 scmd->prot_flags |= SCSI_PROT_TRANSFER_PI;
770
771 if (bio_integrity_flagged(bio, BIP_DISK_NOCHECK))
772 protect = 3 << 5; /* Disable target PI checking */
773 else
774 protect = 1 << 5; /* Enable target PI checking */
35e1a5d9
MP		 775 }
776
777 scsi_set_prot_op(scmd, prot_op);
778 scsi_set_prot_type(scmd, dif);
c611529e
MP		 779 scmd->prot_flags &= sd_prot_flag_mask(prot_op);
780
781 return protect;
35e1a5d9
MP		 782}
783
c98a0eb0
MP		 784static void sd_config_discard(struct scsi_disk *sdkp, unsigned int mode)
785{
786 struct request_queue *q = sdkp->disk->queue;
787 unsigned int logical_block_size = sdkp->device->sector_size;
788 unsigned int max_blocks = 0;
789
bcd069bb
MP		 790 q->limits.discard_alignment =
791 sdkp->unmap_alignment * logical_block_size;
792 q->limits.discard_granularity =
793 max(sdkp->physical_block_size,
794 sdkp->unmap_granularity * logical_block_size);
89730393
MP		 795 sdkp->provisioning_mode = mode;
796
c98a0eb0
MP		 797 switch (mode) {
798
4c11712a 799 case SD_LBP_FULL:
c98a0eb0 800 case SD_LBP_DISABLE:
2bb4cd5c 801 blk_queue_max_discard_sectors(q, 0);
c98a0eb0
MP		 802 return;
803
804 case SD_LBP_UNMAP:
5db44863
MP		 805 max_blocks = min_not_zero(sdkp->max_unmap_blocks,
806 (u32)SD_MAX_WS16_BLOCKS);
c98a0eb0
MP		 807 break;
808
809 case SD_LBP_WS16:
28a0bc41
MP		 810 if (sdkp->device->unmap_limit_for_ws)
811 max_blocks = sdkp->max_unmap_blocks;
812 else
813 max_blocks = sdkp->max_ws_blocks;
814
815 max_blocks = min_not_zero(max_blocks, (u32)SD_MAX_WS16_BLOCKS);
c98a0eb0
MP		 816 break;
817
818 case SD_LBP_WS10:
28a0bc41
MP		 819 if (sdkp->device->unmap_limit_for_ws)
820 max_blocks = sdkp->max_unmap_blocks;
821 else
822 max_blocks = sdkp->max_ws_blocks;
823
824 max_blocks = min_not_zero(max_blocks, (u32)SD_MAX_WS10_BLOCKS);
c98a0eb0
MP		 825 break;
826
827 case SD_LBP_ZERO:
5db44863
MP		 828 max_blocks = min_not_zero(sdkp->max_ws_blocks,
829 (u32)SD_MAX_WS10_BLOCKS);
c98a0eb0
MP		 830 break;
831 }
832
2bb4cd5c 833 blk_queue_max_discard_sectors(q, max_blocks * (logical_block_size >> 9));
c98a0eb0
MP		 834}
835
f1e117cb
CH		 836static void *sd_set_special_bvec(struct request *rq, unsigned int data_len)
837{
838 struct page *page;
839
840 page = mempool_alloc(sd_page_pool, GFP_ATOMIC);
841 if (!page)
842 return NULL;
843 clear_highpage(page);
844 bvec_set_page(&rq->special_vec, page, data_len, 0);
845 rq->rq_flags |= RQF_SPECIAL_PAYLOAD;
846 return bvec_virt(&rq->special_vec);
847}
848
159b2cbf 849static blk_status_t sd_setup_unmap_cmnd(struct scsi_cmnd *cmd)
e339c1a7 850{
6a7b4398 851 struct scsi_device *sdp = cmd->device;
5999ccff 852 struct request *rq = scsi_cmd_to_rq(cmd);
f3fa33ac 853 struct scsi_disk *sdkp = scsi_disk(rq->q->disk);
c6c93fdd
MP		 854 u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq));
855 u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq));
81d926e8 856 unsigned int data_len = 24;
c98a0eb0 857 char *buf;
e339c1a7 858
f1e117cb
CH		 859 buf = sd_set_special_bvec(rq, data_len);
860 if (!buf)
159b2cbf 861 return BLK_STS_RESOURCE;
66ac0280 862
81d926e8
CH		 863 cmd->cmd_len = 10;
864 cmd->cmnd[0] = UNMAP;
865 cmd->cmnd[8] = 24;
e339c1a7 866
81d926e8
CH		 867 put_unaligned_be16(6 + 16, &buf[0]);
868 put_unaligned_be16(16, &buf[2]);
c6c93fdd
MP		 869 put_unaligned_be64(lba, &buf[8]);
870 put_unaligned_be32(nr_blocks, &buf[16]);
e339c1a7 871
0610959f 872 cmd->allowed = sdkp->max_retries;
81d926e8
CH		 873 cmd->transfersize = data_len;
874 rq->timeout = SD_TIMEOUT;
e339c1a7 875
7007e9dd 876 return scsi_alloc_sgtables(cmd);
81d926e8 877}
c98a0eb0 878
159b2cbf
CH		 879static blk_status_t sd_setup_write_same16_cmnd(struct scsi_cmnd *cmd,
880 bool unmap)
81d926e8
CH		 881{
882 struct scsi_device *sdp = cmd->device;
5999ccff 883 struct request *rq = scsi_cmd_to_rq(cmd);
f3fa33ac 884 struct scsi_disk *sdkp = scsi_disk(rq->q->disk);
c6c93fdd
MP		 885 u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq));
886 u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq));
81d926e8 887 u32 data_len = sdp->sector_size;
c98a0eb0 888
f1e117cb 889 if (!sd_set_special_bvec(rq, data_len))
159b2cbf 890 return BLK_STS_RESOURCE;
c98a0eb0 891
81d926e8
CH		 892 cmd->cmd_len = 16;
893 cmd->cmnd[0] = WRITE_SAME_16;
02d26103 894 if (unmap)
6a7b4398 895 cmd->cmnd[1] = 0x8; /* UNMAP */
c6c93fdd
MP		 896 put_unaligned_be64(lba, &cmd->cmnd[2]);
897 put_unaligned_be32(nr_blocks, &cmd->cmnd[10]);
66ac0280 898
0610959f 899 cmd->allowed = sdkp->max_retries;
81d926e8 900 cmd->transfersize = data_len;
02d26103 901 rq->timeout = unmap ? SD_TIMEOUT : SD_WRITE_SAME_TIMEOUT;
c98a0eb0 902
7007e9dd 903 return scsi_alloc_sgtables(cmd);
81d926e8 904}
c98a0eb0 905
159b2cbf
CH		 906static blk_status_t sd_setup_write_same10_cmnd(struct scsi_cmnd *cmd,
907 bool unmap)
81d926e8
CH		 908{
909 struct scsi_device *sdp = cmd->device;
5999ccff 910 struct request *rq = scsi_cmd_to_rq(cmd);
f3fa33ac 911 struct scsi_disk *sdkp = scsi_disk(rq->q->disk);
c6c93fdd
MP		 912 u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq));
913 u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq));
81d926e8 914 u32 data_len = sdp->sector_size;
c98a0eb0 915
f1e117cb 916 if (!sd_set_special_bvec(rq, data_len))
159b2cbf 917 return BLK_STS_RESOURCE;
e339c1a7 918
81d926e8
CH		 919 cmd->cmd_len = 10;
920 cmd->cmnd[0] = WRITE_SAME;
921 if (unmap)
922 cmd->cmnd[1] = 0x8; /* UNMAP */
c6c93fdd
MP		 923 put_unaligned_be32(lba, &cmd->cmnd[2]);
924 put_unaligned_be16(nr_blocks, &cmd->cmnd[7]);
6a7b4398 925
0610959f 926 cmd->allowed = sdkp->max_retries;
81d926e8 927 cmd->transfersize = data_len;
02d26103 928 rq->timeout = unmap ? SD_TIMEOUT : SD_WRITE_SAME_TIMEOUT;
6a7b4398 929
7007e9dd 930 return scsi_alloc_sgtables(cmd);
f1126e95 931}
f9d03f96 932
159b2cbf 933static blk_status_t sd_setup_write_zeroes_cmnd(struct scsi_cmnd *cmd)
02d26103 934{
5999ccff 935 struct request *rq = scsi_cmd_to_rq(cmd);
02d26103 936 struct scsi_device *sdp = cmd->device;
f3fa33ac 937 struct scsi_disk *sdkp = scsi_disk(rq->q->disk);
c6c93fdd
MP		 938 u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq));
939 u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq));
02d26103 940
e4b87837 941 if (!(rq->cmd_flags & REQ_NOUNMAP)) {
e6bd9312
MP		 942 switch (sdkp->zeroing_mode) {
943 case SD_ZERO_WS16_UNMAP:
39051dd8 944 return sd_setup_write_same16_cmnd(cmd, true);
e6bd9312 945 case SD_ZERO_WS10_UNMAP:
39051dd8 946 return sd_setup_write_same10_cmnd(cmd, true);
e4b87837
CH		 947 }
948 }
c98a0eb0 949
e5cc9002
EM		 950 if (sdp->no_write_same) {
951 rq->rq_flags |= RQF_QUIET;
159b2cbf 952 return BLK_STS_TARGET;
e5cc9002 953 }
ed44fd7f 954
c6c93fdd 955 if (sdkp->ws16 || lba > 0xffffffff || nr_blocks > 0xffff)
39051dd8 956 return sd_setup_write_same16_cmnd(cmd, false);
ed44fd7f 957
39051dd8 958 return sd_setup_write_same10_cmnd(cmd, false);
f1126e95
FT		 959}
960
5db44863
MP		 961static void sd_config_write_same(struct scsi_disk *sdkp)
962{
963 struct request_queue *q = sdkp->disk->queue;
964 unsigned int logical_block_size = sdkp->device->sector_size;
5db44863
MP		 965
966 if (sdkp->device->no_write_same) {
967 sdkp->max_ws_blocks = 0;
968 goto out;
969 }
970
971 /* Some devices can not handle block counts above 0xffff despite
972 * supporting WRITE SAME(16). Consequently we default to 64k
973 * blocks per I/O unless the device explicitly advertises a
974 * bigger limit.
975 */
66c28f97
MP		 976 if (sdkp->max_ws_blocks > SD_MAX_WS10_BLOCKS)
977 sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks,
978 (u32)SD_MAX_WS16_BLOCKS);
979 else if (sdkp->ws16 || sdkp->ws10 || sdkp->device->no_report_opcodes)
980 sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks,
981 (u32)SD_MAX_WS10_BLOCKS);
982 else {
983 sdkp->device->no_write_same = 1;
984 sdkp->max_ws_blocks = 0;
985 }
5db44863 986
e6bd9312
MP		 987 if (sdkp->lbprz && sdkp->lbpws)
988 sdkp->zeroing_mode = SD_ZERO_WS16_UNMAP;
989 else if (sdkp->lbprz && sdkp->lbpws10)
990 sdkp->zeroing_mode = SD_ZERO_WS10_UNMAP;
991 else if (sdkp->max_ws_blocks)
992 sdkp->zeroing_mode = SD_ZERO_WS;
993 else
994 sdkp->zeroing_mode = SD_ZERO_WRITE;
995
b7af62a9
DLM		 996 if (sdkp->max_ws_blocks &&
997 sdkp->physical_block_size > logical_block_size) {
998 /*
999 * Reporting a maximum number of blocks that is not aligned
1000 * on the device physical size would cause a large write same
1001 * request to be split into physically unaligned chunks by
e383e16e
CH		 1002 * __blkdev_issue_write_zeroes() even if the caller of this
1003 * functions took care to align the large request. So make sure
1004 * the maximum reported is aligned to the device physical block
1005 * size. This is only an optional optimization for regular
1006 * disks, but this is mandatory to avoid failure of large write
1007 * same requests directed at sequential write required zones of
1008 * host-managed ZBC disks.
b7af62a9
DLM		 1009 */
1010 sdkp->max_ws_blocks =
1011 round_down(sdkp->max_ws_blocks,
1012 bytes_to_logical(sdkp->device,
1013 sdkp->physical_block_size));
1014 }
1015
5db44863 1016out:
02d26103
CH		 1017 blk_queue_max_write_zeroes_sectors(q, sdkp->max_ws_blocks *
1018 (logical_block_size >> 9));
5db44863
MP		 1019}
1020
159b2cbf 1021static blk_status_t sd_setup_flush_cmnd(struct scsi_cmnd *cmd)
90467c29 1022{
5999ccff 1023 struct request *rq = scsi_cmd_to_rq(cmd);
f3fa33ac 1024 struct scsi_disk *sdkp = scsi_disk(rq->q->disk);
a118c6c1
CH		 1025
1026 /* flush requests don't perform I/O, zero the S/G table */
1027 memset(&cmd->sdb, 0, sizeof(cmd->sdb));
90467c29 1028
42c59077
SK		 1029 if (cmd->device->use_16_for_sync) {
1030 cmd->cmnd[0] = SYNCHRONIZE_CACHE_16;
1031 cmd->cmd_len = 16;
1032 } else {
1033 cmd->cmnd[0] = SYNCHRONIZE_CACHE;
1034 cmd->cmd_len = 10;
1035 }
a118c6c1 1036 cmd->transfersize = 0;
0610959f 1037 cmd->allowed = sdkp->max_retries;
a118c6c1 1038
26b9fd8b 1039 rq->timeout = rq->q->rq_timeout * SD_FLUSH_TIMEOUT_MULTIPLIER;
159b2cbf 1040 return BLK_STS_OK;
90467c29
FT		 1041}
1042
78a02f49
MP		 1043static blk_status_t sd_setup_rw32_cmnd(struct scsi_cmnd *cmd, bool write,
1044 sector_t lba, unsigned int nr_blocks,
e59e80cf 1045 unsigned char flags, unsigned int dld)
1da177e4 1046{
78a02f49 1047 cmd->cmd_len = SD_EXT_CDB_SIZE;
78a02f49
MP		 1048 cmd->cmnd[0] = VARIABLE_LENGTH_CMD;
1049 cmd->cmnd[7] = 0x18; /* Additional CDB len */
1050 cmd->cmnd[9] = write ? WRITE_32 : READ_32;
1051 cmd->cmnd[10] = flags;
e59e80cf 1052 cmd->cmnd[11] = dld & 0x07;
78a02f49
MP		 1053 put_unaligned_be64(lba, &cmd->cmnd[12]);
1054 put_unaligned_be32(lba, &cmd->cmnd[20]); /* Expected Indirect LBA */
1055 put_unaligned_be32(nr_blocks, &cmd->cmnd[28]);
1056
1057 return BLK_STS_OK;
1058}
1059
1060static blk_status_t sd_setup_rw16_cmnd(struct scsi_cmnd *cmd, bool write,
1061 sector_t lba, unsigned int nr_blocks,
e59e80cf 1062 unsigned char flags, unsigned int dld)
78a02f49
MP		 1063{
1064 cmd->cmd_len = 16;
1065 cmd->cmnd[0] = write ? WRITE_16 : READ_16;
e59e80cf
DLM		 1066 cmd->cmnd[1] = flags | ((dld >> 2) & 0x01);
1067 cmd->cmnd[14] = (dld & 0x03) << 6;
78a02f49
MP		 1068 cmd->cmnd[15] = 0;
1069 put_unaligned_be64(lba, &cmd->cmnd[2]);
1070 put_unaligned_be32(nr_blocks, &cmd->cmnd[10]);
1071
1072 return BLK_STS_OK;
1073}
1074
1075static blk_status_t sd_setup_rw10_cmnd(struct scsi_cmnd *cmd, bool write,
1076 sector_t lba, unsigned int nr_blocks,
1077 unsigned char flags)
1078{
1079 cmd->cmd_len = 10;
1080 cmd->cmnd[0] = write ? WRITE_10 : READ_10;
1081 cmd->cmnd[1] = flags;
1082 cmd->cmnd[6] = 0;
1083 cmd->cmnd[9] = 0;
1084 put_unaligned_be32(lba, &cmd->cmnd[2]);
1085 put_unaligned_be16(nr_blocks, &cmd->cmnd[7]);
1086
1087 return BLK_STS_OK;
1088}
1089
1090static blk_status_t sd_setup_rw6_cmnd(struct scsi_cmnd *cmd, bool write,
1091 sector_t lba, unsigned int nr_blocks,
1092 unsigned char flags)
1093{
db5db4b9
BVA		 1094 /* Avoid that 0 blocks gets translated into 256 blocks. */
1095 if (WARN_ON_ONCE(nr_blocks == 0))
1096 return BLK_STS_IOERR;
1097
78a02f49
MP		 1098 if (unlikely(flags & 0x8)) {
1099 /*
1100 * This happens only if this drive failed 10byte rw
1101 * command with ILLEGAL_REQUEST during operation and
1102 * thus turned off use_10_for_rw.
1103 */
1104 scmd_printk(KERN_ERR, cmd, "FUA write on READ/WRITE(6) drive\n");
1105 return BLK_STS_IOERR;
1106 }
1107
1108 cmd->cmd_len = 6;
1109 cmd->cmnd[0] = write ? WRITE_6 : READ_6;
1110 cmd->cmnd[1] = (lba >> 16) & 0x1f;
1111 cmd->cmnd[2] = (lba >> 8) & 0xff;
1112 cmd->cmnd[3] = lba & 0xff;
1113 cmd->cmnd[4] = nr_blocks;
1114 cmd->cmnd[5] = 0;
1115
1116 return BLK_STS_OK;
1117}
1118
e59e80cf
DLM		 1119/*
1120 * Check if a command has a duration limit set. If it does, and the target
1121 * device supports CDL and the feature is enabled, return the limit
1122 * descriptor index to use. Return 0 (no limit) otherwise.
1123 */
1124static int sd_cdl_dld(struct scsi_disk *sdkp, struct scsi_cmnd *scmd)
1125{
1126 struct scsi_device *sdp = sdkp->device;
1127 int hint;
1128
1129 if (!sdp->cdl_supported || !sdp->cdl_enable)
1130 return 0;
1131
1132 /*
1133 * Use "no limit" if the request ioprio does not specify a duration
1134 * limit hint.
1135 */
1136 hint = IOPRIO_PRIO_HINT(req_get_ioprio(scsi_cmd_to_rq(scmd)));
1137 if (hint < IOPRIO_HINT_DEV_DURATION_LIMIT_1 ||
1138 hint > IOPRIO_HINT_DEV_DURATION_LIMIT_7)
1139 return 0;
1140
1141 return (hint - IOPRIO_HINT_DEV_DURATION_LIMIT_1) + 1;
1142}
1143
cf64e5a5 1144static blk_status_t sd_setup_read_write_cmnd(struct scsi_cmnd *cmd)
1da177e4 1145{
5999ccff 1146 struct request *rq = scsi_cmd_to_rq(cmd);
cf64e5a5 1147 struct scsi_device *sdp = cmd->device;
f3fa33ac 1148 struct scsi_disk *sdkp = scsi_disk(rq->q->disk);
ec029758 1149 sector_t lba = sectors_to_logical(sdp, blk_rq_pos(rq));
18351070 1150 sector_t threshold;
ec029758 1151 unsigned int nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq));
ec029758 1152 unsigned int mask = logical_to_sectors(sdp, 1) - 1;
78a02f49
MP		 1153 bool write = rq_data_dir(rq) == WRITE;
1154 unsigned char protect, fua;
e59e80cf 1155 unsigned int dld;
159b2cbf 1156 blk_status_t ret;
0cf9f4e5
XC		 1157 unsigned int dif;
1158 bool dix;
7f9a6bc4 1159
7007e9dd 1160 ret = scsi_alloc_sgtables(cmd);
159b2cbf 1161 if (ret != BLK_STS_OK)
39051dd8 1162 return ret;
7f9a6bc4 1163
7007e9dd 1164 ret = BLK_STS_IOERR;
e249e42d 1165 if (!scsi_device_online(sdp) || sdp->changed) {
cf64e5a5 1166 scmd_printk(KERN_ERR, cmd, "device offline or changed\n");
7007e9dd 1167 goto fail;
1da177e4
LT		 1168 }
1169
f3fa33ac 1170 if (blk_rq_pos(rq) + blk_rq_sectors(rq) > get_capacity(rq->q->disk)) {
cf64e5a5 1171 scmd_printk(KERN_ERR, cmd, "access beyond end of device\n");
7007e9dd 1172 goto fail;
e249e42d
MP		 1173 }
1174
1175 if ((blk_rq_pos(rq) & mask) || (blk_rq_sectors(rq) & mask)) {
cf64e5a5 1176 scmd_printk(KERN_ERR, cmd, "request not aligned to the logical block size\n");
7007e9dd 1177 goto fail;
1da177e4 1178 }
7f9a6bc4 1179
a0899d4d 1180 /*
ec029758
MP		 1181 * Some SD card readers can't handle accesses which touch the
1182 * last one or two logical blocks. Split accesses as needed.
a0899d4d 1183 */
ec029758 1184 threshold = sdkp->capacity - SD_LAST_BUGGY_SECTORS;
18351070 1185
c6c93fdd
MP		 1186 if (unlikely(sdp->last_sector_bug && lba + nr_blocks > threshold)) {
1187 if (lba < threshold) {
18351070 1188 /* Access up to the threshold but not beyond */
c6c93fdd 1189 nr_blocks = threshold - lba;
18351070 1190 } else {
ec029758
MP		 1191 /* Access only a single logical block */
1192 nr_blocks = 1;
18351070
LT		 1193 }
1194 }
a0899d4d 1195
5795eb44
JT		 1196 if (req_op(rq) == REQ_OP_ZONE_APPEND) {
1197 ret = sd_zbc_prepare_zone_append(cmd, &lba, nr_blocks);
1198 if (ret)
7007e9dd 1199 goto fail;
5795eb44
JT		 1200 }
1201
78a02f49 1202 fua = rq->cmd_flags & REQ_FUA ? 0x8 : 0;
cf64e5a5
BVA		 1203 dix = scsi_prot_sg_count(cmd);
1204 dif = scsi_host_dif_capable(cmd->device->host, sdkp->protection_type);
e59e80cf 1205 dld = sd_cdl_dld(sdkp, cmd);
1da177e4 1206
c611529e 1207 if (dif || dix)
cf64e5a5 1208 protect = sd_setup_protect_cmnd(cmd, dix, dif);
af55ff67 1209 else
4e7392ec
MP		 1210 protect = 0;
1211
8475c811 1212 if (protect && sdkp->protection_type == T10_PI_TYPE2_PROTECTION) {
cf64e5a5 1213 ret = sd_setup_rw32_cmnd(cmd, write, lba, nr_blocks,
e59e80cf 1214 protect | fua, dld);
c6c93fdd 1215 } else if (sdp->use_16_for_rw || (nr_blocks > 0xffff)) {
cf64e5a5 1216 ret = sd_setup_rw16_cmnd(cmd, write, lba, nr_blocks,
e59e80cf 1217 protect | fua, dld);
c6c93fdd 1218 } else if ((nr_blocks > 0xff) || (lba > 0x1fffff) ||
e249e42d 1219 sdp->use_10_for_rw || protect) {
cf64e5a5 1220 ret = sd_setup_rw10_cmnd(cmd, write, lba, nr_blocks,
78a02f49 1221 protect | fua);
1da177e4 1222 } else {
cf64e5a5 1223 ret = sd_setup_rw6_cmnd(cmd, write, lba, nr_blocks,
78a02f49 1224 protect | fua);
1da177e4 1225 }
78a02f49
MP		 1226
1227 if (unlikely(ret != BLK_STS_OK))
7007e9dd 1228 goto fail;
1da177e4
LT		 1229
1230 /*
1231 * We shouldn't disconnect in the middle of a sector, so with a dumb
1232 * host adapter, it's safe to assume that we can at least transfer
1233 * this many bytes between each connect / disconnect.
1234 */
cf64e5a5
BVA		 1235 cmd->transfersize = sdp->sector_size;
1236 cmd->underflow = nr_blocks << 9;
0610959f 1237 cmd->allowed = sdkp->max_retries;
cf64e5a5 1238 cmd->sdb.length = nr_blocks * sdp->sector_size;
e249e42d
MP		 1239
1240 SCSI_LOG_HLQUEUE(1,
cf64e5a5 1241 scmd_printk(KERN_INFO, cmd,
e249e42d
MP		 1242 "%s: block=%llu, count=%d\n", __func__,
1243 (unsigned long long)blk_rq_pos(rq),
1244 blk_rq_sectors(rq)));
1245 SCSI_LOG_HLQUEUE(2,
cf64e5a5 1246 scmd_printk(KERN_INFO, cmd,
e249e42d
MP		 1247 "%s %d/%u 512 byte blocks.\n",
1248 write ? "writing" : "reading", nr_blocks,
1249 blk_rq_sectors(rq)));
1da177e4 1250
1da177e4 1251 /*
7007e9dd 1252 * This indicates that the command is ready from our end to be queued.
1da177e4 1253 */
159b2cbf 1254 return BLK_STS_OK;
7007e9dd
CH		 1255fail:
1256 scsi_free_sgtables(cmd);
1257 return ret;
1da177e4
LT		 1258}
1259
159b2cbf 1260static blk_status_t sd_init_command(struct scsi_cmnd *cmd)
87949eee 1261{
5999ccff 1262 struct request *rq = scsi_cmd_to_rq(cmd);
87949eee 1263
c2df40df
MC		 1264 switch (req_op(rq)) {
1265 case REQ_OP_DISCARD:
f3fa33ac 1266 switch (scsi_disk(rq->q->disk)->provisioning_mode) {
81d926e8
CH		 1267 case SD_LBP_UNMAP:
1268 return sd_setup_unmap_cmnd(cmd);
1269 case SD_LBP_WS16:
02d26103 1270 return sd_setup_write_same16_cmnd(cmd, true);
81d926e8
CH		 1271 case SD_LBP_WS10:
1272 return sd_setup_write_same10_cmnd(cmd, true);
1273 case SD_LBP_ZERO:
1274 return sd_setup_write_same10_cmnd(cmd, false);
1275 default:
159b2cbf 1276 return BLK_STS_TARGET;
81d926e8 1277 }
02d26103
CH		 1278 case REQ_OP_WRITE_ZEROES:
1279 return sd_setup_write_zeroes_cmnd(cmd);
3a5e02ce 1280 case REQ_OP_FLUSH:
87949eee 1281 return sd_setup_flush_cmnd(cmd);
c2df40df
MC		 1282 case REQ_OP_READ:
1283 case REQ_OP_WRITE:
5795eb44 1284 case REQ_OP_ZONE_APPEND:
87949eee 1285 return sd_setup_read_write_cmnd(cmd);
89d94756 1286 case REQ_OP_ZONE_RESET:
ad512f20
AJ		 1287 return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_RESET_WRITE_POINTER,
1288 false);
d81e9d49 1289 case REQ_OP_ZONE_RESET_ALL:
ad512f20
AJ		 1290 return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_RESET_WRITE_POINTER,
1291 true);
1292 case REQ_OP_ZONE_OPEN:
1293 return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_OPEN_ZONE, false);
1294 case REQ_OP_ZONE_CLOSE:
1295 return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_CLOSE_ZONE, false);
1296 case REQ_OP_ZONE_FINISH:
1297 return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_FINISH_ZONE, false);
c2df40df 1298 default:
f1f1fada 1299 WARN_ON_ONCE(1);
159b2cbf 1300 return BLK_STS_NOTSUPP;
c2df40df 1301 }
87949eee
CH		 1302}
1303
1304static void sd_uninit_command(struct scsi_cmnd *SCpnt)
1305{
5999ccff 1306 struct request *rq = scsi_cmd_to_rq(SCpnt);
87949eee 1307
f9d03f96 1308 if (rq->rq_flags & RQF_SPECIAL_PAYLOAD)
61cce6f6 1309 mempool_free(rq->special_vec.bv_page, sd_page_pool);
87949eee
CH		 1310}
1311
444aa2c5 1312static bool sd_need_revalidate(struct gendisk *disk, struct scsi_disk *sdkp)
d1b7f920
CH		 1313{
1314 if (sdkp->device->removable || sdkp->write_prot) {
444aa2c5 1315 if (disk_check_media_change(disk))
d1b7f920
CH		 1316 return true;
1317 }
1318
1319 /*
1320 * Force a full rescan after ioctl(BLKRRPART). While the disk state has
1321 * nothing to do with partitions, BLKRRPART is used to force a full
1322 * revalidate after things like a format for historical reasons.
1323 */
444aa2c5 1324 return test_bit(GD_NEED_PART_SCAN, &disk->state);
d1b7f920
CH		 1325}
1326
1da177e4
LT		 1327/**
1328 * sd_open - open a scsi disk device
d32e2bf8 1329 * @disk: disk to open
05bdb996 1330 * @mode: open mode
1da177e4
LT		 1331 *
1332 * Returns 0 if successful. Returns a negated errno value in case
1333 * of error.
1334 *
1335 * Note: This can be called from a user context (e.g. fsck(1) )
1336 * or from within the kernel (e.g. as a result of a mount(1) ).
1337 * In the latter case @inode and @filp carry an abridged amount
1338 * of information as noted above.
409f3499 1339 *
d32e2bf8 1340 * Locking: called with disk->open_mutex held.
1da177e4 1341 **/
05bdb996 1342static int sd_open(struct gendisk *disk, blk_mode_t mode)
1da177e4 1343{
d32e2bf8 1344 struct scsi_disk *sdkp = scsi_disk(disk);
9c63f7f6 1345 struct scsi_device *sdev = sdkp->device;
1da177e4
LT		 1346 int retval;
1347
9c63f7f6 1348 if (scsi_device_get(sdev))
1da177e4
LT		 1349 return -ENXIO;
1350
fa0d34be 1351 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_open\n"));
1da177e4 1352
1da177e4
LT		 1353 /*
1354 * If the device is in error recovery, wait until it is done.
1355 * If the device is offline, then disallow any access to it.
1356 */
1357 retval = -ENXIO;
1358 if (!scsi_block_when_processing_errors(sdev))
1359 goto error_out;
1360
d32e2bf8
CH		 1361 if (sd_need_revalidate(disk, sdkp))
1362 sd_revalidate_disk(disk);
1da177e4
LT		 1363
1364 /*
1365 * If the drive is empty, just let the open fail.
1366 */
1367 retval = -ENOMEDIUM;
05bdb996
CH		 1368 if (sdev->removable && !sdkp->media_present &&
1369 !(mode & BLK_OPEN_NDELAY))
1da177e4
LT		 1370 goto error_out;
1371
1372 /*
1373 * If the device has the write protect tab set, have the open fail
1374 * if the user expects to be able to write to the thing.
1375 */
1376 retval = -EROFS;
05bdb996 1377 if (sdkp->write_prot && (mode & BLK_OPEN_WRITE))
1da177e4
LT		 1378 goto error_out;
1379
1380 /*
1381 * It is possible that the disk changing stuff resulted in
1382 * the device being taken offline. If this is the case,
1383 * report this to the user, and don't pretend that the
1384 * open actually succeeded.
1385 */
1386 retval = -ENXIO;
1387 if (!scsi_device_online(sdev))
1388 goto error_out;
1389
409f3499 1390 if ((atomic_inc_return(&sdkp->openers) == 1) && sdev->removable) {
1da177e4
LT		 1391 if (scsi_block_when_processing_errors(sdev))
1392 scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT);
1393 }
1394
1395 return 0;
1396
1397error_out:
9c63f7f6 1398 scsi_device_put(sdev);
1da177e4
LT		 1399 return retval;
1400}
1401
1402/**
1403 * sd_release - invoked when the (last) close(2) is called on this
1404 * scsi disk.
7529fbb0 1405 * @disk: disk to release
1da177e4
LT		 1406 *
1407 * Returns 0.
1408 *
1409 * Note: may block (uninterruptible) if error recovery is underway
1410 * on this disk.
409f3499 1411 *
05bdb996 1412 * Locking: called with disk->open_mutex held.
1da177e4 1413 **/
ae220766 1414static void sd_release(struct gendisk *disk)
1da177e4 1415{
1da177e4
LT		 1416 struct scsi_disk *sdkp = scsi_disk(disk);
1417 struct scsi_device *sdev = sdkp->device;
1418
56937f7b 1419 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_release\n"));
1da177e4 1420
7e443312 1421 if (atomic_dec_return(&sdkp->openers) == 0 && sdev->removable) {
1da177e4
LT		 1422 if (scsi_block_when_processing_errors(sdev))
1423 scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW);
1424 }
1425
9c63f7f6 1426 scsi_device_put(sdev);
1da177e4
LT		 1427}
1428
a885c8c4 1429static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1da177e4
LT		 1430{
1431 struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk);
1432 struct scsi_device *sdp = sdkp->device;
1433 struct Scsi_Host *host = sdp->host;
f08bb1e0 1434 sector_t capacity = logical_to_sectors(sdp, sdkp->capacity);
1da177e4
LT		 1435 int diskinfo[4];
1436
1437 /* default to most commonly used values */
f08bb1e0
MP		 1438 diskinfo[0] = 0x40; /* 1 << 6 */
1439 diskinfo[1] = 0x20; /* 1 << 5 */
1440 diskinfo[2] = capacity >> 11;
1441
1da177e4
LT		 1442 /* override with calculated, extended default, or driver values */
1443 if (host->hostt->bios_param)
f08bb1e0 1444 host->hostt->bios_param(sdp, bdev, capacity, diskinfo);
1da177e4 1445 else
f08bb1e0 1446 scsicam_bios_param(bdev, capacity, diskinfo);
1da177e4 1447
a885c8c4
CH		 1448 geo->heads = diskinfo[0];
1449 geo->sectors = diskinfo[1];
1450 geo->cylinders = diskinfo[2];
1da177e4
LT		 1451 return 0;
1452}
1453
1454/**
44328310 1455 * sd_ioctl - process an ioctl
7529fbb0 1456 * @bdev: target block device
05bdb996 1457 * @mode: open mode
1da177e4 1458 * @cmd: ioctl command number
44328310 1459 * @arg: this is third argument given to ioctl(2) system call.
1da177e4
LT		 1460 * Often contains a pointer.
1461 *
25985edc 1462 * Returns 0 if successful (some ioctls return positive numbers on
1da177e4
LT		 1463 * success as well). Returns a negated errno value in case of error.
1464 *
1465 * Note: most ioctls are forward onto the block subsystem or further
3a4fa0a2 1466 * down in the scsi subsystem.
1da177e4 1467 **/
05bdb996 1468static int sd_ioctl(struct block_device *bdev, blk_mode_t mode,
44328310 1469 unsigned int cmd, unsigned long arg)
1da177e4 1470{
1da177e4 1471 struct gendisk *disk = bdev->bd_disk;
fe2d1851
NN		 1472 struct scsi_disk *sdkp = scsi_disk(disk);
1473 struct scsi_device *sdp = sdkp->device;
44328310 1474 void __user *p = (void __user *)arg;
1da177e4
LT		 1475 int error;
1476
fe2d1851
NN		 1477 SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO, sdkp, "sd_ioctl: disk=%s, "
1478 "cmd=0x%x\n", disk->disk_name, cmd));
1da177e4 1479
4f07bfc5
CH		 1480 if (bdev_is_partition(bdev) && !capable(CAP_SYS_RAWIO))
1481 return -ENOIOCTLCMD;
0bfc96cb 1482
1da177e4
LT		 1483 /*
1484 * If we are in the middle of error recovery, don't let anyone
1485 * else try and use this device. Also, if error recovery fails, it
1486 * may try and take the device offline, in which case all further
1487 * access to the device is prohibited.
1488 */
906d15fb 1489 error = scsi_ioctl_block_when_processing_errors(sdp, cmd,
05bdb996 1490 (mode & BLK_OPEN_NDELAY));
906d15fb 1491 if (error)
44328310 1492 return error;
1da177e4 1493
d80210f2
CH		 1494 if (is_sed_ioctl(cmd))
1495 return sed_ioctl(sdkp->opal_dev, cmd, p);
05bdb996 1496 return scsi_ioctl(sdp, mode & BLK_OPEN_WRITE, cmd, p);
1da177e4
LT		 1497}
1498
1499static void set_media_not_present(struct scsi_disk *sdkp)
1500{
2bae0093
TH		 1501 if (sdkp->media_present)
1502 sdkp->device->changed = 1;
1503
1504 if (sdkp->device->removable) {
1505 sdkp->media_present = 0;
1506 sdkp->capacity = 0;
1507 }
1508}
1509
1510static int media_not_present(struct scsi_disk *sdkp,
1511 struct scsi_sense_hdr *sshdr)
1512{
1513 if (!scsi_sense_valid(sshdr))
1514 return 0;
1515
1516 /* not invoked for commands that could return deferred errors */
1517 switch (sshdr->sense_key) {
1518 case UNIT_ATTENTION:
1519 case NOT_READY:
1520 /* medium not present */
1521 if (sshdr->asc == 0x3A) {
1522 set_media_not_present(sdkp);
1523 return 1;
1524 }
1525 }
1526 return 0;
1da177e4
LT		 1527}
1528
1529/**
2bae0093
TH		 1530 * sd_check_events - check media events
1531 * @disk: kernel device descriptor
1532 * @clearing: disk events currently being cleared
1da177e4 1533 *
2bae0093 1534 * Returns mask of DISK_EVENT_*.
1da177e4
LT		 1535 *
1536 * Note: this function is invoked from the block subsystem.
1537 **/
2bae0093 1538static unsigned int sd_check_events(struct gendisk *disk, unsigned int clearing)
1da177e4 1539{
9c63f7f6 1540 struct scsi_disk *sdkp = disk->private_data;
eb72d0bb 1541 struct scsi_device *sdp;
1da177e4 1542 int retval;
41e70e30 1543 bool disk_changed;
1da177e4 1544
eb72d0bb
HR		 1545 if (!sdkp)
1546 return 0;
1547
1548 sdp = sdkp->device;
2bae0093 1549 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_check_events\n"));
1da177e4
LT		 1550
1551 /*
1552 * If the device is offline, don't send any commands - just pretend as
1553 * if the command failed. If the device ever comes back online, we
1554 * can deal with it then. It is only because of unrecoverable errors
1555 * that we would ever take a device offline in the first place.
1556 */
285e9670
KS		 1557 if (!scsi_device_online(sdp)) {
1558 set_media_not_present(sdkp);
285e9670
KS		 1559 goto out;
1560 }
1da177e4
LT		 1561
1562 /*
1563 * Using TEST_UNIT_READY enables differentiation between drive with
1564 * no cartridge loaded - NOT READY, drive with changed cartridge -
1565 * UNIT ATTENTION, or with same cartridge - GOOD STATUS.
1566 *
1567 * Drives that auto spin down. eg iomega jaz 1G, will be started
1568 * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever
1569 * sd_revalidate() is called.
1570 */
001aac25 1571 if (scsi_block_when_processing_errors(sdp)) {
6fa2b8f9
CH		 1572 struct scsi_sense_hdr sshdr = { 0, };
1573
0610959f 1574 retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, sdkp->max_retries,
6fa2b8f9 1575 &sshdr);
1da177e4 1576
6fa2b8f9 1577 /* failed to execute TUR, assume media not present */
ced202f7 1578 if (retval < 0 || host_byte(retval)) {
6fa2b8f9
CH		 1579 set_media_not_present(sdkp);
1580 goto out;
1581 }
1da177e4 1582
6fa2b8f9
CH		 1583 if (media_not_present(sdkp, &sshdr))
1584 goto out;
1585 }
2bae0093 1586
1da177e4
LT		 1587 /*
1588 * For removable scsi disk we have to recognise the presence
2bae0093 1589 * of a disk in the drive.
1da177e4 1590 */
2bae0093
TH		 1591 if (!sdkp->media_present)
1592 sdp->changed = 1;
1da177e4 1593 sdkp->media_present = 1;
285e9670 1594out:
3ff5588d 1595 /*
2bae0093 1596 * sdp->changed is set under the following conditions:
3ff5588d 1597 *
2bae0093
TH		 1598 * Medium present state has changed in either direction.
1599 * Device has indicated UNIT_ATTENTION.
3ff5588d 1600 */
41e70e30 1601 disk_changed = sdp->changed;
2bae0093 1602 sdp->changed = 0;
41e70e30 1603 return disk_changed ? DISK_EVENT_MEDIA_CHANGE : 0;
1da177e4
LT		 1604}
1605
4fa83244 1606static int sd_sync_cache(struct scsi_disk *sdkp, struct scsi_sense_hdr *sshdr)
1da177e4 1607{
1da177e4 1608 int retries, res;
e73aec82 1609 struct scsi_device *sdp = sdkp->device;
7e660100
JB		 1610 const int timeout = sdp->request_queue->rq_timeout
1611 * SD_FLUSH_TIMEOUT_MULTIPLIER;
4fa83244 1612 struct scsi_sense_hdr my_sshdr;
af16cd63
MC		 1613 const struct scsi_exec_args exec_args = {
1614 .req_flags = BLK_MQ_REQ_PM,
1615 /* caller might not be interested in sense, but we need it */
1616 .sshdr = sshdr ? : &my_sshdr,
1617 };
1da177e4
LT		 1618
1619 if (!scsi_device_online(sdp))
1620 return -ENODEV;
1621
af16cd63 1622 sshdr = exec_args.sshdr;
4fa83244 1623
1da177e4 1624 for (retries = 3; retries > 0; --retries) {
42c59077 1625 unsigned char cmd[16] = { 0 };
1da177e4 1626
42c59077
SK		 1627 if (sdp->use_16_for_sync)
1628 cmd[0] = SYNCHRONIZE_CACHE_16;
1629 else
1630 cmd[0] = SYNCHRONIZE_CACHE;
1da177e4
LT		 1631 /*
1632 * Leave the rest of the command zero to indicate
1633 * flush everything.
1634 */
af16cd63
MC		 1635 res = scsi_execute_cmd(sdp, cmd, REQ_OP_DRV_IN, NULL, 0,
1636 timeout, sdkp->max_retries, &exec_args);
ea73a9f2 1637 if (res == 0)
1da177e4
LT		 1638 break;
1639 }
1640
e73aec82 1641 if (res) {
ef61329d 1642 sd_print_result(sdkp, "Synchronize Cache(10) failed", res);
95897910 1643
ced202f7
HR		 1644 if (res < 0)
1645 return res;
1646
464a00c9
HR		 1647 if (scsi_status_is_check_condition(res) &&
1648 scsi_sense_valid(sshdr)) {
4fa83244
DB		 1649 sd_print_sense_hdr(sdkp, sshdr);
1650
464a00c9
HR		 1651 /* we need to evaluate the error return */
1652 if (sshdr->asc == 0x3a || /* medium not present */
1653 sshdr->asc == 0x20 || /* invalid command */
1654 (sshdr->asc == 0x74 && sshdr->ascq == 0x71)) /* drive is password locked */
95897910
ON		 1655 /* this is no error here */
1656 return 0;
464a00c9 1657 }
95897910
ON		 1658
1659 switch (host_byte(res)) {
1660 /* ignore errors due to racing a disconnection */
1661 case DID_BAD_TARGET:
1662 case DID_NO_CONNECT:
1663 return 0;
1664 /* signal the upper layer it might try again */
1665 case DID_BUS_BUSY:
1666 case DID_IMM_RETRY:
1667 case DID_REQUEUE:
1668 case DID_SOFT_ERROR:
1669 return -EBUSY;
1670 default:
1671 return -EIO;
1672 }
1da177e4 1673 }
3721050a 1674 return 0;
1da177e4
LT		 1675}
1676
1da177e4
LT		 1677static void sd_rescan(struct device *dev)
1678{
3d9a1f53 1679 struct scsi_disk *sdkp = dev_get_drvdata(dev);
39b7f1e2 1680
b200e38c 1681 sd_revalidate_disk(sdkp->disk);
1da177e4
LT		 1682}
1683
b83ce214
CH		 1684static int sd_get_unique_id(struct gendisk *disk, u8 id[16],
1685 enum blk_unique_id type)
1686{
1687 struct scsi_device *sdev = scsi_disk(disk)->device;
1688 const struct scsi_vpd *vpd;
1689 const unsigned char *d;
1690 int ret = -ENXIO, len;
1691
1692 rcu_read_lock();
1693 vpd = rcu_dereference(sdev->vpd_pg83);
1694 if (!vpd)
1695 goto out_unlock;
1696
1697 ret = -EINVAL;
1698 for (d = vpd->data + 4; d < vpd->data + vpd->len; d += d[3] + 4) {
1699 /* we only care about designators with LU association */
1700 if (((d[1] >> 4) & 0x3) != 0x00)
1701 continue;
1702 if ((d[1] & 0xf) != type)
1703 continue;
1704
1705 /*
1706 * Only exit early if a 16-byte descriptor was found. Otherwise
1707 * keep looking as one with more entropy might still show up.
1708 */
1709 len = d[3];
1710 if (len != 8 && len != 12 && len != 16)
1711 continue;
1712 ret = len;
1713 memcpy(id, d + 4, len);
1714 if (len == 16)
1715 break;
1716 }
1717out_unlock:
1718 rcu_read_unlock();
1719 return ret;
1720}
1721
04b3c8c0
MC		 1722static int sd_scsi_to_pr_err(struct scsi_sense_hdr *sshdr, int result)
1723{
1724 switch (host_byte(result)) {
1725 case DID_TRANSPORT_MARGINAL:
1726 case DID_TRANSPORT_DISRUPTED:
1727 case DID_BUS_BUSY:
1728 return PR_STS_RETRY_PATH_FAILURE;
1729 case DID_NO_CONNECT:
1730 return PR_STS_PATH_FAILED;
1731 case DID_TRANSPORT_FAILFAST:
1732 return PR_STS_PATH_FAST_FAILED;
1733 }
1734
1735 switch (status_byte(result)) {
1736 case SAM_STAT_RESERVATION_CONFLICT:
1737 return PR_STS_RESERVATION_CONFLICT;
1738 case SAM_STAT_CHECK_CONDITION:
1739 if (!scsi_sense_valid(sshdr))
1740 return PR_STS_IOERR;
1741
1742 if (sshdr->sense_key == ILLEGAL_REQUEST &&
1743 (sshdr->asc == 0x26 || sshdr->asc == 0x24))
1744 return -EINVAL;
1745
1746 fallthrough;
1747 default:
1748 return PR_STS_IOERR;
1749 }
1750}
1751
0af7b5e2
MC		 1752static int sd_pr_in_command(struct block_device *bdev, u8 sa,
1753 unsigned char *data, int data_len)
1754{
1755 struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk);
1756 struct scsi_device *sdev = sdkp->device;
1757 struct scsi_sense_hdr sshdr;
1758 u8 cmd[10] = { PERSISTENT_RESERVE_IN, sa };
1759 const struct scsi_exec_args exec_args = {
1760 .sshdr = &sshdr,
1761 };
1762 int result;
1763
1764 put_unaligned_be16(data_len, &cmd[7]);
1765
1766 result = scsi_execute_cmd(sdev, cmd, REQ_OP_DRV_IN, data, data_len,
1767 SD_TIMEOUT, sdkp->max_retries, &exec_args);
1768 if (scsi_status_is_check_condition(result) &&
1769 scsi_sense_valid(&sshdr)) {
1770 sdev_printk(KERN_INFO, sdev, "PR command failed: %d\n", result);
1771 scsi_print_sense_hdr(sdev, NULL, &sshdr);
1772 }
1773
1774 if (result <= 0)
1775 return result;
1776
1777 return sd_scsi_to_pr_err(&sshdr, result);
1778}
1779
1780static int sd_pr_read_keys(struct block_device *bdev, struct pr_keys *keys_info)
1781{
1782 int result, i, data_offset, num_copy_keys;
1783 u32 num_keys = keys_info->num_keys;
1784 int data_len = num_keys * 8 + 8;
1785 u8 *data;
1786
1787 data = kzalloc(data_len, GFP_KERNEL);
1788 if (!data)
1789 return -ENOMEM;
1790
1791 result = sd_pr_in_command(bdev, READ_KEYS, data, data_len);
1792 if (result)
1793 goto free_data;
1794
1795 keys_info->generation = get_unaligned_be32(&data[0]);
1796 keys_info->num_keys = get_unaligned_be32(&data[4]) / 8;
1797
1798 data_offset = 8;
1799 num_copy_keys = min(num_keys, keys_info->num_keys);
1800
1801 for (i = 0; i < num_copy_keys; i++) {
1802 keys_info->keys[i] = get_unaligned_be64(&data[data_offset]);
1803 data_offset += 8;
1804 }
1805
1806free_data:
1807 kfree(data);
1808 return result;
1809}
1810
1811static int sd_pr_read_reservation(struct block_device *bdev,
1812 struct pr_held_reservation *rsv)
1813{
1814 struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk);
1815 struct scsi_device *sdev = sdkp->device;
1816 u8 data[24] = { };
1817 int result, len;
1818
1819 result = sd_pr_in_command(bdev, READ_RESERVATION, data, sizeof(data));
1820 if (result)
1821 return result;
1822
1823 len = get_unaligned_be32(&data[4]);
1824 if (!len)
1825 return 0;
1826
1827 /* Make sure we have at least the key and type */
1828 if (len < 14) {
1829 sdev_printk(KERN_INFO, sdev,
1830 "READ RESERVATION failed due to short return buffer of %d bytes\n",
1831 len);
1832 return -EINVAL;
1833 }
1834
1835 rsv->generation = get_unaligned_be32(&data[0]);
1836 rsv->key = get_unaligned_be64(&data[8]);
1837 rsv->type = scsi_pr_type_to_block(data[21] & 0x0f);
1838 return 0;
1839}
1840
0730b163
MC		 1841static int sd_pr_out_command(struct block_device *bdev, u8 sa, u64 key,
1842 u64 sa_key, enum scsi_pr_type type, u8 flags)
924d55b0 1843{
0610959f
MC		 1844 struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk);
1845 struct scsi_device *sdev = sdkp->device;
924d55b0 1846 struct scsi_sense_hdr sshdr;
af16cd63
MC		 1847 const struct scsi_exec_args exec_args = {
1848 .sshdr = &sshdr,
1849 };
924d55b0
CH		 1850 int result;
1851 u8 cmd[16] = { 0, };
1852 u8 data[24] = { 0, };
1853
1854 cmd[0] = PERSISTENT_RESERVE_OUT;
1855 cmd[1] = sa;
1856 cmd[2] = type;
1857 put_unaligned_be32(sizeof(data), &cmd[5]);
1858
1859 put_unaligned_be64(key, &data[0]);
1860 put_unaligned_be64(sa_key, &data[8]);
1861 data[20] = flags;
1862
af16cd63
MC		 1863 result = scsi_execute_cmd(sdev, cmd, REQ_OP_DRV_OUT, &data,
1864 sizeof(data), SD_TIMEOUT, sdkp->max_retries,
1865 &exec_args);
924d55b0 1866
464a00c9 1867 if (scsi_status_is_check_condition(result) &&
c65be1a6 1868 scsi_sense_valid(&sshdr)) {
924d55b0
CH		 1869 sdev_printk(KERN_INFO, sdev, "PR command failed: %d\n", result);
1870 scsi_print_sense_hdr(sdev, NULL, &sshdr);
1871 }
1872
04b3c8c0
MC		 1873 if (result <= 0)
1874 return result;
1875
1876 return sd_scsi_to_pr_err(&sshdr, result);
924d55b0
CH		 1877}
1878
1879static int sd_pr_register(struct block_device *bdev, u64 old_key, u64 new_key,
1880 u32 flags)
1881{
1882 if (flags & ~PR_FL_IGNORE_KEY)
1883 return -EOPNOTSUPP;
20bebccb 1884 return sd_pr_out_command(bdev, (flags & PR_FL_IGNORE_KEY) ? 0x06 : 0x00,
924d55b0 1885 old_key, new_key, 0,
01f90dd9 1886 (1 << 0) /* APTPL */);
924d55b0
CH		 1887}
1888
1889static int sd_pr_reserve(struct block_device *bdev, u64 key, enum pr_type type,
1890 u32 flags)
1891{
1892 if (flags)
1893 return -EOPNOTSUPP;
0730b163
MC		 1894 return sd_pr_out_command(bdev, 0x01, key, 0,
1895 block_pr_type_to_scsi(type), 0);
924d55b0
CH		 1896}
1897
1898static int sd_pr_release(struct block_device *bdev, u64 key, enum pr_type type)
1899{
0730b163
MC		 1900 return sd_pr_out_command(bdev, 0x02, key, 0,
1901 block_pr_type_to_scsi(type), 0);
924d55b0
CH		 1902}
1903
1904static int sd_pr_preempt(struct block_device *bdev, u64 old_key, u64 new_key,
1905 enum pr_type type, bool abort)
1906{
20bebccb 1907 return sd_pr_out_command(bdev, abort ? 0x05 : 0x04, old_key, new_key,
0730b163 1908 block_pr_type_to_scsi(type), 0);
924d55b0
CH		 1909}
1910
1911static int sd_pr_clear(struct block_device *bdev, u64 key)
1912{
20bebccb 1913 return sd_pr_out_command(bdev, 0x03, key, 0, 0, 0);
924d55b0
CH		 1914}
1915
1916static const struct pr_ops sd_pr_ops = {
1917 .pr_register = sd_pr_register,
1918 .pr_reserve = sd_pr_reserve,
1919 .pr_release = sd_pr_release,
1920 .pr_preempt = sd_pr_preempt,
1921 .pr_clear = sd_pr_clear,
0af7b5e2
MC		 1922 .pr_read_keys = sd_pr_read_keys,
1923 .pr_read_reservation = sd_pr_read_reservation,
924d55b0
CH		 1924};
1925
9c63f7f6
CH		 1926static void scsi_disk_free_disk(struct gendisk *disk)
1927{
1928 struct scsi_disk *sdkp = scsi_disk(disk);
1929
1930 put_device(&sdkp->disk_dev);
1931}
1932
83d5cde4 1933static const struct block_device_operations sd_fops = {
1da177e4 1934 .owner = THIS_MODULE,
0338e291
AV		 1935 .open = sd_open,
1936 .release = sd_release,
8a6cfeb6 1937 .ioctl = sd_ioctl,
a885c8c4 1938 .getgeo = sd_getgeo,
44328310 1939 .compat_ioctl = blkdev_compat_ptr_ioctl,
2bae0093 1940 .check_events = sd_check_events,
72ec24bd 1941 .unlock_native_capacity = sd_unlock_native_capacity,
e76239a3 1942 .report_zones = sd_zbc_report_zones,
b83ce214 1943 .get_unique_id = sd_get_unique_id,
9c63f7f6 1944 .free_disk = scsi_disk_free_disk,
924d55b0 1945 .pr_ops = &sd_pr_ops,
1da177e4
LT		 1946};
1947
7a38dc0b
HR		 1948/**
1949 * sd_eh_reset - reset error handling callback
1950 * @scmd: sd-issued command that has failed
1951 *
1952 * This function is called by the SCSI midlayer before starting
1953 * SCSI EH. When counting medium access failures we have to be
1954 * careful to register it only only once per device and SCSI EH run;
1955 * there might be several timed out commands which will cause the
1956 * 'max_medium_access_timeouts' counter to trigger after the first
1957 * SCSI EH run already and set the device to offline.
1958 * So this function resets the internal counter before starting SCSI EH.
1959 **/
1960static void sd_eh_reset(struct scsi_cmnd *scmd)
1961{
f3fa33ac 1962 struct scsi_disk *sdkp = scsi_disk(scsi_cmd_to_rq(scmd)->q->disk);
7a38dc0b
HR		 1963
1964 /* New SCSI EH run, reset gate variable */
1965 sdkp->ignore_medium_access_errors = false;
1966}
1967
18a4d0a2
MP		 1968/**
1969 * sd_eh_action - error handling callback
1970 * @scmd: sd-issued command that has failed
18a4d0a2
MP		 1971 * @eh_disp: The recovery disposition suggested by the midlayer
1972 *
2451079b
JB		 1973 * This function is called by the SCSI midlayer upon completion of an
1974 * error test command (currently TEST UNIT READY). The result of sending
1975 * the eh command is passed in eh_disp. We're looking for devices that
1976 * fail medium access commands but are OK with non access commands like
1977 * test unit ready (so wrongly see the device as having a successful
1978 * recovery)
18a4d0a2 1979 **/
2451079b 1980static int sd_eh_action(struct scsi_cmnd *scmd, int eh_disp)
18a4d0a2 1981{
f3fa33ac 1982 struct scsi_disk *sdkp = scsi_disk(scsi_cmd_to_rq(scmd)->q->disk);
0db6ca8a 1983 struct scsi_device *sdev = scmd->device;
18a4d0a2 1984
0db6ca8a 1985 if (!scsi_device_online(sdev) ||
2451079b
JB		 1986 !scsi_medium_access_command(scmd) ||
1987 host_byte(scmd->result) != DID_TIME_OUT ||
1988 eh_disp != SUCCESS)
18a4d0a2
MP		 1989 return eh_disp;
1990
1991 /*
1992 * The device has timed out executing a medium access command.
1993 * However, the TEST UNIT READY command sent during error
1994 * handling completed successfully. Either the device is in the
1995 * process of recovering or has it suffered an internal failure
1996 * that prevents access to the storage medium.
1997 */
7a38dc0b
HR		 1998 if (!sdkp->ignore_medium_access_errors) {
1999 sdkp->medium_access_timed_out++;
2000 sdkp->ignore_medium_access_errors = true;
2001 }
18a4d0a2
MP		 2002
2003 /*
2004 * If the device keeps failing read/write commands but TEST UNIT
2005 * READY always completes successfully we assume that medium
2006 * access is no longer possible and take the device offline.
2007 */
2008 if (sdkp->medium_access_timed_out >= sdkp->max_medium_access_timeouts) {
2009 scmd_printk(KERN_ERR, scmd,
2010 "Medium access timeout failure. Offlining disk!\n");
0db6ca8a
BVA		 2011 mutex_lock(&sdev->state_mutex);
2012 scsi_device_set_state(sdev, SDEV_OFFLINE);
2013 mutex_unlock(&sdev->state_mutex);
18a4d0a2 2014
e8f8d50e 2015 return SUCCESS;
18a4d0a2
MP		 2016 }
2017
2018 return eh_disp;
2019}
2020
af55ff67
MP		 2021static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd)
2022{
5999ccff 2023 struct request *req = scsi_cmd_to_rq(scmd);
6eadc612
DLM		 2024 struct scsi_device *sdev = scmd->device;
2025 unsigned int transferred, good_bytes;
2026 u64 start_lba, end_lba, bad_lba;
2027
a8733c7b 2028 /*
6eadc612
DLM		 2029 * Some commands have a payload smaller than the device logical
2030 * block size (e.g. INQUIRY on a 4K disk).
a8733c7b 2031 */
6eadc612 2032 if (scsi_bufflen(scmd) <= sdev->sector_size)
af55ff67
MP		 2033 return 0;
2034
6eadc612
DLM		 2035 /* Check if we have a 'bad_lba' information */
2036 if (!scsi_get_sense_info_fld(scmd->sense_buffer,
2037 SCSI_SENSE_BUFFERSIZE,
2038 &bad_lba))
af55ff67
MP		 2039 return 0;
2040
6eadc612
DLM		 2041 /*
2042 * If the bad lba was reported incorrectly, we have no idea where
af55ff67
MP		 2043 * the error is.
2044 */
6eadc612
DLM		 2045 start_lba = sectors_to_logical(sdev, blk_rq_pos(req));
2046 end_lba = start_lba + bytes_to_logical(sdev, scsi_bufflen(scmd));
2047 if (bad_lba < start_lba || bad_lba >= end_lba)
af55ff67
MP		 2048 return 0;
2049
6eadc612
DLM		 2050 /*
2051 * resid is optional but mostly filled in. When it's unused,
2052 * its value is zero, so we assume the whole buffer transferred
af55ff67 2053 */
6eadc612
DLM		 2054 transferred = scsi_bufflen(scmd) - scsi_get_resid(scmd);
2055
2056 /* This computation should always be done in terms of the
2057 * resolution of the device's medium.
af55ff67 2058 */
6eadc612
DLM		 2059 good_bytes = logical_to_bytes(sdev, bad_lba - start_lba);
2060
a8733c7b 2061 return min(good_bytes, transferred);
af55ff67
MP		 2062}
2063
1da177e4 2064/**
7b3d9545 2065 * sd_done - bottom half handler: called when the lower level
1da177e4
LT		 2066 * driver has completed (successfully or otherwise) a scsi command.
2067 * @SCpnt: mid-level's per command structure.
2068 *
2069 * Note: potentially run from within an ISR. Must not block.
2070 **/
7b3d9545 2071static int sd_done(struct scsi_cmnd *SCpnt)
1da177e4
LT		 2072{
2073 int result = SCpnt->result;
af55ff67 2074 unsigned int good_bytes = result ? 0 : scsi_bufflen(SCpnt);
c46f0917
DLM		 2075 unsigned int sector_size = SCpnt->device->sector_size;
2076 unsigned int resid;
1da177e4 2077 struct scsi_sense_hdr sshdr;
5999ccff 2078 struct request *req = scsi_cmd_to_rq(SCpnt);
f3fa33ac 2079 struct scsi_disk *sdkp = scsi_disk(req->q->disk);
1da177e4
LT		 2080 int sense_valid = 0;
2081 int sense_deferred = 0;
1da177e4 2082
89d94756
HR		 2083 switch (req_op(req)) {
2084 case REQ_OP_DISCARD:
02d26103 2085 case REQ_OP_WRITE_ZEROES:
89d94756 2086 case REQ_OP_ZONE_RESET:
d81e9d49 2087 case REQ_OP_ZONE_RESET_ALL:
ad512f20
AJ		 2088 case REQ_OP_ZONE_OPEN:
2089 case REQ_OP_ZONE_CLOSE:
2090 case REQ_OP_ZONE_FINISH:
26e85fcd
MP		 2091 if (!result) {
2092 good_bytes = blk_rq_bytes(req);
2093 scsi_set_resid(SCpnt, 0);
2094 } else {
2095 good_bytes = 0;
2096 scsi_set_resid(SCpnt, blk_rq_bytes(req));
89d94756
HR		 2097 }
2098 break;
c46f0917
DLM		 2099 default:
2100 /*
2101 * In case of bogus fw or device, we could end up having
2102 * an unaligned partial completion. Check this here and force
2103 * alignment.
2104 */
2105 resid = scsi_get_resid(SCpnt);
2106 if (resid & (sector_size - 1)) {
2107 sd_printk(KERN_INFO, sdkp,
2108 "Unaligned partial completion (resid=%u, sector_sz=%u)\n",
2109 resid, sector_size);
670d8be2 2110 scsi_print_command(SCpnt);
c46f0917
DLM		 2111 resid = min(scsi_bufflen(SCpnt),
2112 round_up(resid, sector_size));
2113 scsi_set_resid(SCpnt, resid);
2114 }
26e85fcd 2115 }
6a32a8ae 2116
1da177e4
LT		 2117 if (result) {
2118 sense_valid = scsi_command_normalize_sense(SCpnt, &sshdr);
2119 if (sense_valid)
2120 sense_deferred = scsi_sense_is_deferred(&sshdr);
2121 }
2a863ba8
DJ		 2122 sdkp->medium_access_timed_out = 0;
2123
464a00c9 2124 if (!scsi_status_is_check_condition(result) &&
03aba2f7
LT		 2125 (!sense_valid || sense_deferred))
2126 goto out;
2127
2128 switch (sshdr.sense_key) {
2129 case HARDWARE_ERROR:
2130 case MEDIUM_ERROR:
af55ff67 2131 good_bytes = sd_completed_bytes(SCpnt);
03aba2f7
LT		 2132 break;
2133 case RECOVERED_ERROR:
af55ff67
MP		 2134 good_bytes = scsi_bufflen(SCpnt);
2135 break;
10dab226
JW		 2136 case NO_SENSE:
2137 /* This indicates a false check condition, so ignore it. An
2138 * unknown amount of data was transferred so treat it as an
2139 * error.
2140 */
10dab226
JW		 2141 SCpnt->result = 0;
2142 memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
2143 break;
c98a0eb0
MP		 2144 case ABORTED_COMMAND:
2145 if (sshdr.asc == 0x10) /* DIF: Target detected corruption */
2146 good_bytes = sd_completed_bytes(SCpnt);
2147 break;
2148 case ILLEGAL_REQUEST:
d227ec26
CH		 2149 switch (sshdr.asc) {
2150 case 0x10: /* DIX: Host detected corruption */
af55ff67 2151 good_bytes = sd_completed_bytes(SCpnt);
d227ec26
CH		 2152 break;
2153 case 0x20: /* INVALID COMMAND OPCODE */
2154 case 0x24: /* INVALID FIELD IN CDB */
2155 switch (SCpnt->cmnd[0]) {
5db44863
MP		 2156 case UNMAP:
2157 sd_config_discard(sdkp, SD_LBP_DISABLE);
2158 break;
2159 case WRITE_SAME_16:
2160 case WRITE_SAME:
d227ec26 2161 if (SCpnt->cmnd[1] & 8) { /* UNMAP */
5db44863 2162 sd_config_discard(sdkp, SD_LBP_DISABLE);
d227ec26 2163 } else {
5db44863
MP		 2164 sdkp->device->no_write_same = 1;
2165 sd_config_write_same(sdkp);
e8064021 2166 req->rq_flags |= RQF_QUIET;
5db44863 2167 }
d227ec26 2168 break;
5db44863
MP		 2169 }
2170 }
03aba2f7
LT		 2171 break;
2172 default:
2173 break;
1da177e4 2174 }
89d94756 2175
03aba2f7 2176 out:
89d94756 2177 if (sd_is_zoned(sdkp))
5795eb44 2178 good_bytes = sd_zbc_complete(SCpnt, good_bytes, &sshdr);
89d94756 2179
ef61329d
HR		 2180 SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO, SCpnt,
2181 "sd_done: completed %d of %d bytes\n",
2182 good_bytes, scsi_bufflen(SCpnt)));
2183
7b3d9545 2184 return good_bytes;
1da177e4
LT		 2185}
2186
1da177e4
LT		 2187/*
2188 * spinup disk - called only in sd_revalidate_disk()
2189 */
2190static void
e73aec82 2191sd_spinup_disk(struct scsi_disk *sdkp)
ea73a9f2 2192{
1da177e4 2193 unsigned char cmd[10];
4451e472 2194 unsigned long spintime_expire = 0;
1da177e4
LT		 2195 int retries, spintime;
2196 unsigned int the_result;
2197 struct scsi_sense_hdr sshdr;
af16cd63
MC		 2198 const struct scsi_exec_args exec_args = {
2199 .sshdr = &sshdr,
2200 };
1da177e4
LT		 2201 int sense_valid = 0;
2202
2203 spintime = 0;
2204
2205 /* Spin up drives, as required. Only do this at boot time */
2206 /* Spinup needs to be done for module loads too. */
2207 do {
2208 retries = 0;
2209
2210 do {
4521428c
HK		 2211 bool media_was_present = sdkp->media_present;
2212
1da177e4
LT		 2213 cmd[0] = TEST_UNIT_READY;
2214 memset((void *) &cmd[1], 0, 9);
2215
af16cd63
MC		 2216 the_result = scsi_execute_cmd(sdkp->device, cmd,
2217 REQ_OP_DRV_IN, NULL, 0,
2218 SD_TIMEOUT,
2219 sdkp->max_retries,
2220 &exec_args);
1da177e4 2221
b4d38e38
AS		 2222 /*
2223 * If the drive has indicated to us that it
2224 * doesn't have any media in it, don't bother
2225 * with any more polling.
2226 */
848ade90 2227 if (media_not_present(sdkp, &sshdr)) {
4521428c
HK		 2228 if (media_was_present)
2229 sd_printk(KERN_NOTICE, sdkp, "Media removed, stopped polling\n");
b4d38e38 2230 return;
848ade90 2231 }
b4d38e38 2232
1da177e4 2233 if (the_result)
ea73a9f2 2234 sense_valid = scsi_sense_valid(&sshdr);
1da177e4 2235 retries++;
464a00c9 2236 } while (retries < 3 &&
1da177e4 2237 (!scsi_status_is_good(the_result) ||
464a00c9 2238 (scsi_status_is_check_condition(the_result) &&
1da177e4
LT		 2239 sense_valid && sshdr.sense_key == UNIT_ATTENTION)));
2240
464a00c9 2241 if (!scsi_status_is_check_condition(the_result)) {
1da177e4
LT		 2242 /* no sense, TUR either succeeded or failed
2243 * with a status error */
e73aec82 2244 if(!spintime && !scsi_status_is_good(the_result)) {
ef61329d
HR		 2245 sd_print_result(sdkp, "Test Unit Ready failed",
2246 the_result);
e73aec82 2247 }
1da177e4
LT		 2248 break;
2249 }
ef61329d 2250
1da177e4
LT		 2251 /*
2252 * The device does not want the automatic start to be issued.
2253 */
33dd6f92 2254 if (sdkp->device->no_start_on_add)
1da177e4 2255 break;
1da177e4 2256
33dd6f92
MW		 2257 if (sense_valid && sshdr.sense_key == NOT_READY) {
2258 if (sshdr.asc == 4 && sshdr.ascq == 3)
2259 break; /* manual intervention required */
2260 if (sshdr.asc == 4 && sshdr.ascq == 0xb)
2261 break; /* standby */
2262 if (sshdr.asc == 4 && sshdr.ascq == 0xc)
2263 break; /* unavailable */
505aa4b6
MR		 2264 if (sshdr.asc == 4 && sshdr.ascq == 0x1b)
2265 break; /* sanitize in progress */
33dd6f92
MW		 2266 /*
2267 * Issue command to spin up drive when not ready
2268 */
1da177e4 2269 if (!spintime) {
e73aec82 2270 sd_printk(KERN_NOTICE, sdkp, "Spinning up disk...");
1da177e4
LT		 2271 cmd[0] = START_STOP;
2272 cmd[1] = 1; /* Return immediately */
2273 memset((void *) &cmd[2], 0, 8);
2274 cmd[4] = 1; /* Start spin cycle */
d2886ea3
SR		 2275 if (sdkp->device->start_stop_pwr_cond)
2276 cmd[4] |= 1 << 4;
af16cd63
MC		 2277 scsi_execute_cmd(sdkp->device, cmd,
2278 REQ_OP_DRV_IN, NULL, 0,
0610959f 2279 SD_TIMEOUT, sdkp->max_retries,
af16cd63 2280 &exec_args);
4451e472
AS		 2281 spintime_expire = jiffies + 100 * HZ;
2282 spintime = 1;
1da177e4 2283 }
1da177e4
LT		 2284 /* Wait 1 second for next try */
2285 msleep(1000);
3a1d0783 2286 printk(KERN_CONT ".");
4451e472
AS		 2287
2288 /*
2289 * Wait for USB flash devices with slow firmware.
2290 * Yes, this sense key/ASC combination shouldn't
2291 * occur here. It's characteristic of these devices.
2292 */
2293 } else if (sense_valid &&
2294 sshdr.sense_key == UNIT_ATTENTION &&
2295 sshdr.asc == 0x28) {
2296 if (!spintime) {
2297 spintime_expire = jiffies + 5 * HZ;
2298 spintime = 1;
2299 }
2300 /* Wait 1 second for next try */
2301 msleep(1000);
1da177e4
LT		 2302 } else {
2303 /* we don't understand the sense code, so it's
2304 * probably pointless to loop */
2305 if(!spintime) {
e73aec82
MP		 2306 sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n");
2307 sd_print_sense_hdr(sdkp, &sshdr);
1da177e4
LT		 2308 }
2309 break;
2310 }
2311
4451e472 2312 } while (spintime && time_before_eq(jiffies, spintime_expire));
1da177e4
LT		 2313
2314 if (spintime) {
2315 if (scsi_status_is_good(the_result))
3a1d0783 2316 printk(KERN_CONT "ready\n");
1da177e4 2317 else
3a1d0783 2318 printk(KERN_CONT "not responding...\n");
1da177e4
LT		 2319 }
2320}
2321
e0597d70
MP		 2322/*
2323 * Determine whether disk supports Data Integrity Field.
2324 */
fe542396 2325static int sd_read_protection_type(struct scsi_disk *sdkp, unsigned char *buffer)
e0597d70
MP		 2326{
2327 struct scsi_device *sdp = sdkp->device;
2328 u8 type;
2329
465f4eda
XC		 2330 if (scsi_device_protection(sdp) == 0 || (buffer[12] & 1) == 0) {
2331 sdkp->protection_type = 0;
1e029397 2332 return 0;
465f4eda 2333 }
35e1a5d9
MP		 2334
2335 type = ((buffer[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */
2336
1e029397
MP		 2337 if (type > T10_PI_TYPE3_PROTECTION) {
2338 sd_printk(KERN_ERR, sdkp, "formatted with unsupported" \
2339 " protection type %u. Disabling disk!\n",
2340 type);
2341 sdkp->protection_type = 0;
2342 return -ENODEV;
2343 }
e0597d70 2344
be922f47
MP		 2345 sdkp->protection_type = type;
2346
1e029397
MP		 2347 return 0;
2348}
2349
2350static void sd_config_protection(struct scsi_disk *sdkp)
2351{
2352 struct scsi_device *sdp = sdkp->device;
2353
1e029397
MP		 2354 sd_dif_config_host(sdkp);
2355
2356 if (!sdkp->protection_type)
2357 return;
2358
2359 if (!scsi_host_dif_capable(sdp->host, sdkp->protection_type)) {
26a02d97
XY		 2360 sd_first_printk(KERN_NOTICE, sdkp,
2361 "Disabling DIF Type %u protection\n",
2362 sdkp->protection_type);
1e029397
MP		 2363 sdkp->protection_type = 0;
2364 }
2365
26a02d97
XY		 2366 sd_first_printk(KERN_NOTICE, sdkp, "Enabling DIF Type %u protection\n",
2367 sdkp->protection_type);
e0597d70
MP		 2368}
2369
0da205e0
MW		 2370static void read_capacity_error(struct scsi_disk *sdkp, struct scsi_device *sdp,
2371 struct scsi_sense_hdr *sshdr, int sense_valid,
2372 int the_result)
2373{
464a00c9 2374 if (sense_valid)
0da205e0
MW		 2375 sd_print_sense_hdr(sdkp, sshdr);
2376 else
2377 sd_printk(KERN_NOTICE, sdkp, "Sense not available.\n");
2378
2379 /*
2380 * Set dirty bit for removable devices if not ready -
2381 * sometimes drives will not report this properly.
2382 */
2383 if (sdp->removable &&
2384 sense_valid && sshdr->sense_key == NOT_READY)
2bae0093 2385 set_media_not_present(sdkp);
0da205e0
MW		 2386
2387 /*
2388 * We used to set media_present to 0 here to indicate no media
2389 * in the drive, but some drives fail read capacity even with
2390 * media present, so we can't do that.
2391 */
2392 sdkp->capacity = 0; /* unknown mapped to zero - as usual */
2393}
2394
2395#define RC16_LEN 32
2396#if RC16_LEN > SD_BUF_SIZE
2397#error RC16_LEN must not be more than SD_BUF_SIZE
2398#endif
2399
3233ac19
JB		 2400#define READ_CAPACITY_RETRIES_ON_RESET 10
2401
0da205e0
MW		 2402static int read_capacity_16(struct scsi_disk *sdkp, struct scsi_device *sdp,
2403 unsigned char *buffer)
ea73a9f2 2404{
1da177e4 2405 unsigned char cmd[16];
1da177e4 2406 struct scsi_sense_hdr sshdr;
af16cd63
MC		 2407 const struct scsi_exec_args exec_args = {
2408 .sshdr = &sshdr,
2409 };
1da177e4 2410 int sense_valid = 0;
0da205e0 2411 int the_result;
3233ac19 2412 int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET;
ea09bcc9 2413 unsigned int alignment;
0da205e0
MW		 2414 unsigned long long lba;
2415 unsigned sector_size;
1da177e4 2416
5ce524bd
HG		 2417 if (sdp->no_read_capacity_16)
2418 return -EINVAL;
2419
1da177e4 2420 do {
0da205e0 2421 memset(cmd, 0, 16);
eb846d9f 2422 cmd[0] = SERVICE_ACTION_IN_16;
0da205e0
MW		 2423 cmd[1] = SAI_READ_CAPACITY_16;
2424 cmd[13] = RC16_LEN;
2425 memset(buffer, 0, RC16_LEN);
2426
af16cd63
MC		 2427 the_result = scsi_execute_cmd(sdp, cmd, REQ_OP_DRV_IN,
2428 buffer, RC16_LEN, SD_TIMEOUT,
2429 sdkp->max_retries, &exec_args);
1da177e4 2430
ea73a9f2 2431 if (media_not_present(sdkp, &sshdr))
0da205e0 2432 return -ENODEV;
1da177e4 2433
ced202f7 2434 if (the_result > 0) {
ea73a9f2 2435 sense_valid = scsi_sense_valid(&sshdr);
2b301307
MW		 2436 if (sense_valid &&
2437 sshdr.sense_key == ILLEGAL_REQUEST &&
2438 (sshdr.asc == 0x20 || sshdr.asc == 0x24) &&
2439 sshdr.ascq == 0x00)
2440 /* Invalid Command Operation Code or
2441 * Invalid Field in CDB, just retry
2442 * silently with RC10 */
2443 return -EINVAL;
3233ac19
JB		 2444 if (sense_valid &&
2445 sshdr.sense_key == UNIT_ATTENTION &&
2446 sshdr.asc == 0x29 && sshdr.ascq == 0x00)
2447 /* Device reset might occur several times,
2448 * give it one more chance */
2449 if (--reset_retries > 0)
2450 continue;
2b301307 2451 }
1da177e4
LT		 2452 retries--;
2453
2454 } while (the_result && retries);
2455
0da205e0 2456 if (the_result) {
ef61329d 2457 sd_print_result(sdkp, "Read Capacity(16) failed", the_result);
0da205e0
MW		 2458 read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result);
2459 return -EINVAL;
2460 }
e73aec82 2461
8f76d151
DH		 2462 sector_size = get_unaligned_be32(&buffer[8]);
2463 lba = get_unaligned_be64(&buffer[0]);
0da205e0 2464
fe542396
MP		 2465 if (sd_read_protection_type(sdkp, buffer) < 0) {
2466 sdkp->capacity = 0;
2467 return -ENODEV;
2468 }
0da205e0 2469
ea09bcc9 2470 /* Logical blocks per physical block exponent */
526f7c79 2471 sdkp->physical_block_size = (1 << (buffer[13] & 0xf)) * sector_size;
ea09bcc9 2472
89d94756
HR		 2473 /* RC basis */
2474 sdkp->rc_basis = (buffer[12] >> 4) & 0x3;
2475
ea09bcc9
MP		 2476 /* Lowest aligned logical block */
2477 alignment = ((buffer[14] & 0x3f) << 8 | buffer[15]) * sector_size;
2478 blk_queue_alignment_offset(sdp->request_queue, alignment);
2479 if (alignment && sdkp->first_scan)
2480 sd_printk(KERN_NOTICE, sdkp,
2481 "physical block alignment offset: %u\n", alignment);
2482
c98a0eb0
MP		 2483 if (buffer[14] & 0x80) { /* LBPME */
2484 sdkp->lbpme = 1;
e339c1a7 2485
c98a0eb0
MP		 2486 if (buffer[14] & 0x40) /* LBPRZ */
2487 sdkp->lbprz = 1;
e339c1a7 2488
c98a0eb0 2489 sd_config_discard(sdkp, SD_LBP_WS16);
e339c1a7
MP		 2490 }
2491
0da205e0
MW		 2492 sdkp->capacity = lba + 1;
2493 return sector_size;
2494}
2495
2496static int read_capacity_10(struct scsi_disk *sdkp, struct scsi_device *sdp,
2497 unsigned char *buffer)
2498{
2499 unsigned char cmd[16];
2500 struct scsi_sense_hdr sshdr;
af16cd63
MC		 2501 const struct scsi_exec_args exec_args = {
2502 .sshdr = &sshdr,
2503 };
0da205e0
MW		 2504 int sense_valid = 0;
2505 int the_result;
3233ac19 2506 int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET;
0da205e0
MW		 2507 sector_t lba;
2508 unsigned sector_size;
2509
2510 do {
2511 cmd[0] = READ_CAPACITY;
2512 memset(&cmd[1], 0, 9);
2513 memset(buffer, 0, 8);
2514
af16cd63
MC		 2515 the_result = scsi_execute_cmd(sdp, cmd, REQ_OP_DRV_IN, buffer,
2516 8, SD_TIMEOUT, sdkp->max_retries,
2517 &exec_args);
0da205e0
MW		 2518
2519 if (media_not_present(sdkp, &sshdr))
2520 return -ENODEV;
2521
ced202f7 2522 if (the_result > 0) {
0da205e0 2523 sense_valid = scsi_sense_valid(&sshdr);
3233ac19
JB		 2524 if (sense_valid &&
2525 sshdr.sense_key == UNIT_ATTENTION &&
2526 sshdr.asc == 0x29 && sshdr.ascq == 0x00)
2527 /* Device reset might occur several times,
2528 * give it one more chance */
2529 if (--reset_retries > 0)
2530 continue;
2531 }
0da205e0
MW		 2532 retries--;
2533
2534 } while (the_result && retries);
2535
2536 if (the_result) {
ef61329d 2537 sd_print_result(sdkp, "Read Capacity(10) failed", the_result);
0da205e0
MW		 2538 read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result);
2539 return -EINVAL;
2540 }
2541
8f76d151
DH		 2542 sector_size = get_unaligned_be32(&buffer[4]);
2543 lba = get_unaligned_be32(&buffer[0]);
0da205e0 2544
5ce524bd
HG		 2545 if (sdp->no_read_capacity_16 && (lba == 0xffffffff)) {
2546 /* Some buggy (usb cardreader) devices return an lba of
2547 0xffffffff when the want to report a size of 0 (with
2548 which they really mean no media is present) */
2549 sdkp->capacity = 0;
5cc10350 2550 sdkp->physical_block_size = sector_size;
5ce524bd
HG		 2551 return sector_size;
2552 }
2553
0da205e0 2554 sdkp->capacity = lba + 1;
526f7c79 2555 sdkp->physical_block_size = sector_size;
0da205e0
MW		 2556 return sector_size;
2557}
2558
2b301307
MW		 2559static int sd_try_rc16_first(struct scsi_device *sdp)
2560{
f87146bb
HR		 2561 if (sdp->host->max_cmd_len < 16)
2562 return 0;
6a0bdffa
AS		 2563 if (sdp->try_rc_10_first)
2564 return 0;
2b301307
MW		 2565 if (sdp->scsi_level > SCSI_SPC_2)
2566 return 1;
2567 if (scsi_device_protection(sdp))
2568 return 1;
2569 return 0;
2570}
2571
0da205e0
MW		 2572/*
2573 * read disk capacity
2574 */
2575static void
2576sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer)
2577{
2578 int sector_size;
2579 struct scsi_device *sdp = sdkp->device;
2580
2b301307 2581 if (sd_try_rc16_first(sdp)) {
0da205e0
MW		 2582 sector_size = read_capacity_16(sdkp, sdp, buffer);
2583 if (sector_size == -EOVERFLOW)
1da177e4 2584 goto got_data;
2b301307
MW		 2585 if (sector_size == -ENODEV)
2586 return;
2587 if (sector_size < 0)
2588 sector_size = read_capacity_10(sdkp, sdp, buffer);
0da205e0
MW		 2589 if (sector_size < 0)
2590 return;
1da177e4 2591 } else {
0da205e0
MW		 2592 sector_size = read_capacity_10(sdkp, sdp, buffer);
2593 if (sector_size == -EOVERFLOW)
2594 goto got_data;
2595 if (sector_size < 0)
2596 return;
2597 if ((sizeof(sdkp->capacity) > 4) &&
2598 (sdkp->capacity > 0xffffffffULL)) {
2599 int old_sector_size = sector_size;
2600 sd_printk(KERN_NOTICE, sdkp, "Very big device. "
2601 "Trying to use READ CAPACITY(16).\n");
2602 sector_size = read_capacity_16(sdkp, sdp, buffer);
2603 if (sector_size < 0) {
2604 sd_printk(KERN_NOTICE, sdkp,
2605 "Using 0xffffffff as device size\n");
2606 sdkp->capacity = 1 + (sector_t) 0xffffffff;
2607 sector_size = old_sector_size;
2608 goto got_data;
2609 }
597d7400
MP		 2610 /* Remember that READ CAPACITY(16) succeeded */
2611 sdp->try_rc_10_first = 0;
0da205e0
MW		 2612 }
2613 }
1da177e4 2614
5c211caa
AS		 2615 /* Some devices are known to return the total number of blocks,
2616 * not the highest block number. Some devices have versions
2617 * which do this and others which do not. Some devices we might
2618 * suspect of doing this but we don't know for certain.
2619 *
2620 * If we know the reported capacity is wrong, decrement it. If
2621 * we can only guess, then assume the number of blocks is even
2622 * (usually true but not always) and err on the side of lowering
2623 * the capacity.
2624 */
2625 if (sdp->fix_capacity ||
2626 (sdp->guess_capacity && (sdkp->capacity & 0x01))) {
2627 sd_printk(KERN_INFO, sdkp, "Adjusting the sector count "
2628 "from its reported value: %llu\n",
2629 (unsigned long long) sdkp->capacity);
1da177e4 2630 --sdkp->capacity;
61bf54b7
ON		 2631 }
2632
1da177e4
LT		 2633got_data:
2634 if (sector_size == 0) {
2635 sector_size = 512;
e73aec82
MP		 2636 sd_printk(KERN_NOTICE, sdkp, "Sector size 0 reported, "
2637 "assuming 512.\n");
1da177e4
LT		 2638 }
2639
2640 if (sector_size != 512 &&
2641 sector_size != 1024 &&
2642 sector_size != 2048 &&
74856fbf 2643 sector_size != 4096) {
e73aec82
MP		 2644 sd_printk(KERN_NOTICE, sdkp, "Unsupported sector size %d.\n",
2645 sector_size);
1da177e4
LT		 2646 /*
2647 * The user might want to re-format the drive with
2648 * a supported sectorsize. Once this happens, it
2649 * would be relatively trivial to set the thing up.
2650 * For this reason, we leave the thing in the table.
2651 */
2652 sdkp->capacity = 0;
2653 /*
2654 * set a bogus sector size so the normal read/write
2655 * logic in the block layer will eventually refuse any
2656 * request on this device without tripping over power
2657 * of two sector size assumptions
2658 */
2659 sector_size = 512;
2660 }
e1defc4f 2661 blk_queue_logical_block_size(sdp->request_queue, sector_size);
89d94756
HR		 2662 blk_queue_physical_block_size(sdp->request_queue,
2663 sdkp->physical_block_size);
2664 sdkp->device->sector_size = sector_size;
7404ad3b 2665
89d94756
HR		 2666 if (sdkp->capacity > 0xffffffff)
2667 sdp->use_16_for_rw = 1;
1da177e4 2668
89d94756 2669}
1da177e4 2670
89d94756
HR		 2671/*
2672 * Print disk capacity
2673 */
2674static void
2675sd_print_capacity(struct scsi_disk *sdkp,
2676 sector_t old_capacity)
2677{
2678 int sector_size = sdkp->device->sector_size;
2679 char cap_str_2[10], cap_str_10[10];
ea09bcc9 2680
d7e6db20
DLM		 2681 if (!sdkp->first_scan && old_capacity == sdkp->capacity)
2682 return;
2683
89d94756
HR		 2684 string_get_size(sdkp->capacity, sector_size,
2685 STRING_UNITS_2, cap_str_2, sizeof(cap_str_2));
2686 string_get_size(sdkp->capacity, sector_size,
d7e6db20 2687 STRING_UNITS_10, cap_str_10, sizeof(cap_str_10));
1da177e4 2688
d7e6db20
DLM		 2689 sd_printk(KERN_NOTICE, sdkp,
2690 "%llu %d-byte logical blocks: (%s/%s)\n",
2691 (unsigned long long)sdkp->capacity,
2692 sector_size, cap_str_10, cap_str_2);
53ad570b 2693
d7e6db20
DLM		 2694 if (sdkp->physical_block_size != sector_size)
2695 sd_printk(KERN_NOTICE, sdkp,
2696 "%u-byte physical blocks\n",
2697 sdkp->physical_block_size);
1da177e4
LT		 2698}
2699
2700/* called with buffer of length 512 */
2701static inline int
0610959f 2702sd_do_mode_sense(struct scsi_disk *sdkp, int dbd, int modepage,
ea73a9f2
JB		 2703 unsigned char *buffer, int len, struct scsi_mode_data *data,
2704 struct scsi_sense_hdr *sshdr)
1da177e4 2705{
c749301e
DLM		 2706 /*
2707 * If we must use MODE SENSE(10), make sure that the buffer length
2708 * is at least 8 bytes so that the mode sense header fits.
2709 */
2710 if (sdkp->device->use_10_for_ms && len < 8)
2711 len = 8;
2712
a6cdc35f
DLM		 2713 return scsi_mode_sense(sdkp->device, dbd, modepage, 0, buffer, len,
2714 SD_TIMEOUT, sdkp->max_retries, data, sshdr);
1da177e4
LT		 2715}
2716
2717/*
2718 * read write protect setting, if possible - called only in sd_revalidate_disk()
48970800 2719 * called with buffer of length SD_BUF_SIZE
1da177e4
LT		 2720 */
2721static void
e73aec82 2722sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer)
ea73a9f2 2723{
1da177e4 2724 int res;
ea73a9f2 2725 struct scsi_device *sdp = sdkp->device;
1da177e4 2726 struct scsi_mode_data data;
70a9b873 2727 int old_wp = sdkp->write_prot;
1da177e4
LT		 2728
2729 set_disk_ro(sdkp->disk, 0);
ea73a9f2 2730 if (sdp->skip_ms_page_3f) {
b2bff6ce 2731 sd_first_printk(KERN_NOTICE, sdkp, "Assuming Write Enabled\n");
1da177e4
LT		 2732 return;
2733 }
2734
ea73a9f2 2735 if (sdp->use_192_bytes_for_3f) {
0610959f 2736 res = sd_do_mode_sense(sdkp, 0, 0x3F, buffer, 192, &data, NULL);
1da177e4
LT		 2737 } else {
2738 /*
2739 * First attempt: ask for all pages (0x3F), but only 4 bytes.
2740 * We have to start carefully: some devices hang if we ask
2741 * for more than is available.
2742 */
0610959f 2743 res = sd_do_mode_sense(sdkp, 0, 0x3F, buffer, 4, &data, NULL);
1da177e4
LT		 2744
2745 /*
2746 * Second attempt: ask for page 0 When only page 0 is
2747 * implemented, a request for page 3F may return Sense Key
2748 * 5: Illegal Request, Sense Code 24: Invalid field in
2749 * CDB.
2750 */
8793613d 2751 if (res < 0)
0610959f 2752 res = sd_do_mode_sense(sdkp, 0, 0, buffer, 4, &data, NULL);
1da177e4
LT		 2753
2754 /*
2755 * Third attempt: ask 255 bytes, as we did earlier.
2756 */
8793613d 2757 if (res < 0)
0610959f 2758 res = sd_do_mode_sense(sdkp, 0, 0x3F, buffer, 255,
ea73a9f2 2759 &data, NULL);
1da177e4
LT		 2760 }
2761
8793613d 2762 if (res < 0) {
b2bff6ce 2763 sd_first_printk(KERN_WARNING, sdkp,
e73aec82 2764 "Test WP failed, assume Write Enabled\n");
1da177e4
LT		 2765 } else {
2766 sdkp->write_prot = ((data.device_specific & 0x80) != 0);
8acf608e 2767 set_disk_ro(sdkp->disk, sdkp->write_prot);
70a9b873
MP		 2768 if (sdkp->first_scan || old_wp != sdkp->write_prot) {
2769 sd_printk(KERN_NOTICE, sdkp, "Write Protect is %s\n",
2770 sdkp->write_prot ? "on" : "off");
df441cc0 2771 sd_printk(KERN_DEBUG, sdkp, "Mode Sense: %4ph\n", buffer);
70a9b873 2772 }
1da177e4
LT		 2773 }
2774}
2775
2776/*
2777 * sd_read_cache_type - called only from sd_revalidate_disk()
48970800 2778 * called with buffer of length SD_BUF_SIZE
1da177e4
LT		 2779 */
2780static void
e73aec82 2781sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer)
631e8a13 2782{
1da177e4 2783 int len = 0, res;
ea73a9f2 2784 struct scsi_device *sdp = sdkp->device;
1da177e4 2785
631e8a13
AV		 2786 int dbd;
2787 int modepage;
0bcaa111 2788 int first_len;
1da177e4
LT		 2789 struct scsi_mode_data data;
2790 struct scsi_sense_hdr sshdr;
70a9b873
MP		 2791 int old_wce = sdkp->WCE;
2792 int old_rcd = sdkp->RCD;
2793 int old_dpofua = sdkp->DPOFUA;
1da177e4 2794
39c60a09
JB		 2795
2796 if (sdkp->cache_override)
2797 return;
2798
0bcaa111
LT		 2799 first_len = 4;
2800 if (sdp->skip_ms_page_8) {
2801 if (sdp->type == TYPE_RBC)
2802 goto defaults;
2803 else {
2804 if (sdp->skip_ms_page_3f)
2805 goto defaults;
2806 modepage = 0x3F;
2807 if (sdp->use_192_bytes_for_3f)
2808 first_len = 192;
2809 dbd = 0;
2810 }
2811 } else if (sdp->type == TYPE_RBC) {
631e8a13
AV		 2812 modepage = 6;
2813 dbd = 8;
2814 } else {
2815 modepage = 8;
2816 dbd = 0;
2817 }
2818
1da177e4 2819 /* cautiously ask */
0610959f 2820 res = sd_do_mode_sense(sdkp, dbd, modepage, buffer, first_len,
0bcaa111 2821 &data, &sshdr);
1da177e4 2822
8793613d 2823 if (res < 0)
1da177e4
LT		 2824 goto bad_sense;
2825
6d73c851
AV		 2826 if (!data.header_length) {
2827 modepage = 6;
0bcaa111 2828 first_len = 0;
b2bff6ce
MP		 2829 sd_first_printk(KERN_ERR, sdkp,
2830 "Missing header in MODE_SENSE response\n");
6d73c851
AV		 2831 }
2832
1da177e4
LT		 2833 /* that went OK, now ask for the proper length */
2834 len = data.length;
2835
2836 /*
2837 * We're only interested in the first three bytes, actually.
2838 * But the data cache page is defined for the first 20.
2839 */
2840 if (len < 3)
2841 goto bad_sense;
0bcaa111 2842 else if (len > SD_BUF_SIZE) {
b2bff6ce 2843 sd_first_printk(KERN_NOTICE, sdkp, "Truncating mode parameter "
0bcaa111
LT		 2844 "data from %d to %d bytes\n", len, SD_BUF_SIZE);
2845 len = SD_BUF_SIZE;
2846 }
2847 if (modepage == 0x3F && sdp->use_192_bytes_for_3f)
2848 len = 192;
1da177e4
LT		 2849
2850 /* Get the data */
0bcaa111 2851 if (len > first_len)
0610959f 2852 res = sd_do_mode_sense(sdkp, dbd, modepage, buffer, len,
0bcaa111 2853 &data, &sshdr);
1da177e4 2854
8793613d 2855 if (!res) {
631e8a13 2856 int offset = data.header_length + data.block_descriptor_length;
1da177e4 2857
0bcaa111
LT		 2858 while (offset < len) {
2859 u8 page_code = buffer[offset] & 0x3F;
2860 u8 spf = buffer[offset] & 0x40;
2861
2862 if (page_code == 8 || page_code == 6) {
2863 /* We're interested only in the first 3 bytes.
2864 */
2865 if (len - offset <= 2) {
b2bff6ce
MP		 2866 sd_first_printk(KERN_ERR, sdkp,
2867 "Incomplete mode parameter "
2868 "data\n");
0bcaa111
LT		 2869 goto defaults;
2870 } else {
2871 modepage = page_code;
2872 goto Page_found;
2873 }
2874 } else {
2875 /* Go to the next page */
2876 if (spf && len - offset > 3)
2877 offset += 4 + (buffer[offset+2] << 8) +
2878 buffer[offset+3];
2879 else if (!spf && len - offset > 1)
2880 offset += 2 + buffer[offset+1];
2881 else {
b2bff6ce
MP		 2882 sd_first_printk(KERN_ERR, sdkp,
2883 "Incomplete mode "
2884 "parameter data\n");
0bcaa111
LT		 2885 goto defaults;
2886 }
2887 }
48970800
AV		 2888 }
2889
c4da1205
MK		 2890 sd_first_printk(KERN_WARNING, sdkp,
2891 "No Caching mode page found\n");
984f1733
AS		 2892 goto defaults;
2893
0bcaa111 2894 Page_found:
631e8a13
AV		 2895 if (modepage == 8) {
2896 sdkp->WCE = ((buffer[offset + 2] & 0x04) != 0);
2897 sdkp->RCD = ((buffer[offset + 2] & 0x01) != 0);
2898 } else {
2899 sdkp->WCE = ((buffer[offset + 2] & 0x01) == 0);
2900 sdkp->RCD = 0;
2901 }
1da177e4 2902
007365ad 2903 sdkp->DPOFUA = (data.device_specific & 0x10) != 0;
b14bf2d0
AS		 2904 if (sdp->broken_fua) {
2905 sd_first_printk(KERN_NOTICE, sdkp, "Disabling FUA\n");
2906 sdkp->DPOFUA = 0;
26f28197
DLM		 2907 } else if (sdkp->DPOFUA && !sdkp->device->use_10_for_rw &&
2908 !sdkp->device->use_16_for_rw) {
b2bff6ce 2909 sd_first_printk(KERN_NOTICE, sdkp,
e73aec82 2910 "Uses READ/WRITE(6), disabling FUA\n");
007365ad
TH		 2911 sdkp->DPOFUA = 0;
2912 }
2913
2eefd57b
SRT		 2914 /* No cache flush allowed for write protected devices */
2915 if (sdkp->WCE && sdkp->write_prot)
2916 sdkp->WCE = 0;
2917
70a9b873
MP		 2918 if (sdkp->first_scan || old_wce != sdkp->WCE ||
2919 old_rcd != sdkp->RCD || old_dpofua != sdkp->DPOFUA)
2920 sd_printk(KERN_NOTICE, sdkp,
2921 "Write cache: %s, read cache: %s, %s\n",
2922 sdkp->WCE ? "enabled" : "disabled",
2923 sdkp->RCD ? "disabled" : "enabled",
2924 sdkp->DPOFUA ? "supports DPO and FUA"
2925 : "doesn't support DPO or FUA");
1da177e4
LT		 2926
2927 return;
2928 }
2929
2930bad_sense:
ea73a9f2 2931 if (scsi_sense_valid(&sshdr) &&
1da177e4
LT		 2932 sshdr.sense_key == ILLEGAL_REQUEST &&
2933 sshdr.asc == 0x24 && sshdr.ascq == 0x0)
e73aec82 2934 /* Invalid field in CDB */
b2bff6ce 2935 sd_first_printk(KERN_NOTICE, sdkp, "Cache data unavailable\n");
1da177e4 2936 else
b2bff6ce
MP		 2937 sd_first_printk(KERN_ERR, sdkp,
2938 "Asking for cache data failed\n");
1da177e4
LT		 2939
2940defaults:
b81478d8 2941 if (sdp->wce_default_on) {
b2bff6ce
MP		 2942 sd_first_printk(KERN_NOTICE, sdkp,
2943 "Assuming drive cache: write back\n");
b81478d8
NJ		 2944 sdkp->WCE = 1;
2945 } else {
c4da1205 2946 sd_first_printk(KERN_WARNING, sdkp,
b2bff6ce 2947 "Assuming drive cache: write through\n");
b81478d8
NJ		 2948 sdkp->WCE = 0;
2949 }
1da177e4 2950 sdkp->RCD = 0;
48970800 2951 sdkp->DPOFUA = 0;
1da177e4
LT		 2952}
2953
e0597d70
MP		 2954/*
2955 * The ATO bit indicates whether the DIF application tag is available
2956 * for use by the operating system.
2957 */
439d77f7 2958static void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer)
e0597d70
MP		 2959{
2960 int res, offset;
2961 struct scsi_device *sdp = sdkp->device;
2962 struct scsi_mode_data data;
2963 struct scsi_sense_hdr sshdr;
2964
89d94756 2965 if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC)
e0597d70
MP		 2966 return;
2967
2968 if (sdkp->protection_type == 0)
2969 return;
2970
a6cdc35f 2971 res = scsi_mode_sense(sdp, 1, 0x0a, 0, buffer, 36, SD_TIMEOUT,
0610959f 2972 sdkp->max_retries, &data, &sshdr);
e0597d70 2973
8793613d 2974 if (res < 0 || !data.header_length ||
e0597d70 2975 data.length < 6) {
b2bff6ce 2976 sd_first_printk(KERN_WARNING, sdkp,
e0597d70
MP		 2977 "getting Control mode page failed, assume no ATO\n");
2978
2979 if (scsi_sense_valid(&sshdr))
2980 sd_print_sense_hdr(sdkp, &sshdr);
2981
2982 return;
2983 }
2984
2985 offset = data.header_length + data.block_descriptor_length;
2986
2987 if ((buffer[offset] & 0x3f) != 0x0a) {
b2bff6ce 2988 sd_first_printk(KERN_ERR, sdkp, "ATO Got wrong page\n");
e0597d70
MP		 2989 return;
2990 }
2991
2992 if ((buffer[offset + 5] & 0x80) == 0)
2993 return;
2994
2995 sdkp->ATO = 1;
2996
2997 return;
2998}
2999
d11b6916
MP		 3000/**
3001 * sd_read_block_limits - Query disk device for preferred I/O sizes.
7529fbb0 3002 * @sdkp: disk to query
d11b6916
MP		 3003 */
3004static void sd_read_block_limits(struct scsi_disk *sdkp)
3005{
7fb019c4 3006 struct scsi_vpd *vpd;
d11b6916 3007
7fb019c4 3008 rcu_read_lock();
d11b6916 3009
7fb019c4
MP		 3010 vpd = rcu_dereference(sdkp->device->vpd_pgb0);
3011 if (!vpd || vpd->len < 16)
e3deec09 3012 goto out;
ca369d51 3013
631669a2 3014 sdkp->min_xfer_blocks = get_unaligned_be16(&vpd->data[6]);
7fb019c4
MP		 3015 sdkp->max_xfer_blocks = get_unaligned_be32(&vpd->data[8]);
3016 sdkp->opt_xfer_blocks = get_unaligned_be32(&vpd->data[12]);
d11b6916 3017
7fb019c4 3018 if (vpd->len >= 64) {
c98a0eb0 3019 unsigned int lba_count, desc_count;
e339c1a7 3020
7fb019c4 3021 sdkp->max_ws_blocks = (u32)get_unaligned_be64(&vpd->data[36]);
e339c1a7 3022
c98a0eb0 3023 if (!sdkp->lbpme)
045d3fe7 3024 goto out;
045d3fe7 3025
7fb019c4
MP		 3026 lba_count = get_unaligned_be32(&vpd->data[20]);
3027 desc_count = get_unaligned_be32(&vpd->data[24]);
045d3fe7 3028
c98a0eb0
MP		 3029 if (lba_count && desc_count)
3030 sdkp->max_unmap_blocks = lba_count;
e339c1a7 3031
7fb019c4 3032 sdkp->unmap_granularity = get_unaligned_be32(&vpd->data[28]);
e339c1a7 3033
7fb019c4 3034 if (vpd->data[32] & 0x80)
c98a0eb0 3035 sdkp->unmap_alignment =
7fb019c4 3036 get_unaligned_be32(&vpd->data[32]) & ~(1 << 31);
c98a0eb0
MP		 3037
3038 if (!sdkp->lbpvpd) { /* LBP VPD page not provided */
3039
3040 if (sdkp->max_unmap_blocks)
3041 sd_config_discard(sdkp, SD_LBP_UNMAP);
3042 else
3043 sd_config_discard(sdkp, SD_LBP_WS16);
3044
3045 } else { /* LBP VPD page tells us what to use */
bcd069bb 3046 if (sdkp->lbpu && sdkp->max_unmap_blocks)
e461338b
MP		 3047 sd_config_discard(sdkp, SD_LBP_UNMAP);
3048 else if (sdkp->lbpws)
c98a0eb0
MP		 3049 sd_config_discard(sdkp, SD_LBP_WS16);
3050 else if (sdkp->lbpws10)
3051 sd_config_discard(sdkp, SD_LBP_WS10);
3052 else
3053 sd_config_discard(sdkp, SD_LBP_DISABLE);
3054 }
e339c1a7
MP		 3055 }
3056
e3deec09 3057 out:
7fb019c4 3058 rcu_read_unlock();
d11b6916
MP		 3059}
3060
3821d768
MP		 3061/**
3062 * sd_read_block_characteristics - Query block dev. characteristics
7529fbb0 3063 * @sdkp: disk to query
3821d768
MP		 3064 */
3065static void sd_read_block_characteristics(struct scsi_disk *sdkp)
3066{
89d94756 3067 struct request_queue *q = sdkp->disk->queue;
7fb019c4 3068 struct scsi_vpd *vpd;
3821d768 3069 u16 rot;
7fb019c4 3070 u8 zoned;
3821d768 3071
7fb019c4
MP		 3072 rcu_read_lock();
3073 vpd = rcu_dereference(sdkp->device->vpd_pgb1);
3821d768 3074
7fb019c4
MP		 3075 if (!vpd || vpd->len < 8) {
3076 rcu_read_unlock();
3077 return;
3078 }
3821d768 3079
7fb019c4
MP		 3080 rot = get_unaligned_be16(&vpd->data[4]);
3081 zoned = (vpd->data[8] >> 4) & 3;
3082 rcu_read_unlock();
3821d768 3083
b277da0a 3084 if (rot == 1) {
8b904b5b
BVA		 3085 blk_queue_flag_set(QUEUE_FLAG_NONROT, q);
3086 blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, q);
b277da0a 3087 }
3821d768 3088
68af412c 3089 if (sdkp->device->type == TYPE_ZBC) {
288b3271
SK		 3090 /*
3091 * Host-managed: Per ZBC and ZAC specifications, writes in
3092 * sequential write required zones of host-managed devices must
3093 * be aligned to the device physical block size.
3094 */
6b2bd274 3095 disk_set_zoned(sdkp->disk, BLK_ZONED_HM);
288b3271 3096 blk_queue_zone_write_granularity(q, sdkp->physical_block_size);
68af412c 3097 } else {
7fb019c4 3098 sdkp->zoned = zoned;
27ba3e8f 3099 if (sdkp->zoned == 1) {
68af412c 3100 /* Host-aware */
6b2bd274 3101 disk_set_zoned(sdkp->disk, BLK_ZONED_HA);
b7205307 3102 } else {
27ba3e8f 3103 /* Regular disk or drive managed disk */
6b2bd274 3104 disk_set_zoned(sdkp->disk, BLK_ZONED_NONE);
b7205307 3105 }
68af412c 3106 }
27ba3e8f
DLM		 3107
3108 if (!sdkp->first_scan)
7fb019c4 3109 return;
27ba3e8f
DLM		 3110
3111 if (blk_queue_is_zoned(q)) {
89d94756
HR		 3112 sd_printk(KERN_NOTICE, sdkp, "Host-%s zoned block device\n",
3113 q->limits.zoned == BLK_ZONED_HM ? "managed" : "aware");
27ba3e8f
DLM		 3114 } else {
3115 if (sdkp->zoned == 1)
3116 sd_printk(KERN_NOTICE, sdkp,
3117 "Host-aware SMR disk used as regular disk\n");
3118 else if (sdkp->zoned == 2)
3119 sd_printk(KERN_NOTICE, sdkp,
3120 "Drive-managed SMR disk\n");
3121 }
3821d768
MP		 3122}
3123
045d3fe7 3124/**
c98a0eb0 3125 * sd_read_block_provisioning - Query provisioning VPD page
7529fbb0 3126 * @sdkp: disk to query
045d3fe7 3127 */
c98a0eb0 3128static void sd_read_block_provisioning(struct scsi_disk *sdkp)
045d3fe7 3129{
7fb019c4 3130 struct scsi_vpd *vpd;
045d3fe7 3131
c98a0eb0 3132 if (sdkp->lbpme == 0)
045d3fe7
MP		 3133 return;
3134
7fb019c4
MP		 3135 rcu_read_lock();
3136 vpd = rcu_dereference(sdkp->device->vpd_pgb2);
045d3fe7 3137
7fb019c4
MP		 3138 if (!vpd || vpd->len < 8) {
3139 rcu_read_unlock();
3140 return;
3141 }
045d3fe7 3142
c98a0eb0 3143 sdkp->lbpvpd = 1;
7fb019c4
MP		 3144 sdkp->lbpu = (vpd->data[5] >> 7) & 1; /* UNMAP */
3145 sdkp->lbpws = (vpd->data[5] >> 6) & 1; /* WRITE SAME(16) w/ UNMAP */
3146 sdkp->lbpws10 = (vpd->data[5] >> 5) & 1; /* WRITE SAME(10) w/ UNMAP */
3147 rcu_read_unlock();
045d3fe7
MP		 3148}
3149
5db44863
MP		 3150static void sd_read_write_same(struct scsi_disk *sdkp, unsigned char *buffer)
3151{
66c28f97
MP		 3152 struct scsi_device *sdev = sdkp->device;
3153
54b2b50c
MP		 3154 if (sdev->host->no_write_same) {
3155 sdev->no_write_same = 1;
3156
3157 return;
3158 }
3159
152e52fb 3160 if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, INQUIRY, 0) < 0) {
e38d9e83 3161 struct scsi_vpd *vpd;
af73623f 3162
66c28f97
MP		 3163 sdev->no_report_opcodes = 1;
3164
3165 /* Disable WRITE SAME if REPORT SUPPORTED OPERATION
3166 * CODES is unsupported and the device has an ATA
3167 * Information VPD page (SAT).
3168 */
e38d9e83
MP		 3169 rcu_read_lock();
3170 vpd = rcu_dereference(sdev->vpd_pg89);
3171 if (vpd)
66c28f97 3172 sdev->no_write_same = 1;
e38d9e83 3173 rcu_read_unlock();
66c28f97
MP		 3174 }
3175
152e52fb 3176 if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME_16, 0) == 1)
5db44863 3177 sdkp->ws16 = 1;
66c28f97 3178
152e52fb 3179 if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME, 0) == 1)
66c28f97 3180 sdkp->ws10 = 1;
5db44863
MP		 3181}
3182
d80210f2
CH		 3183static void sd_read_security(struct scsi_disk *sdkp, unsigned char *buffer)
3184{
3185 struct scsi_device *sdev = sdkp->device;
3186
3187 if (!sdev->security_supported)
3188 return;
3189
3190 if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE,
152e52fb 3191 SECURITY_PROTOCOL_IN, 0) == 1 &&
d80210f2 3192 scsi_report_opcode(sdev, buffer, SD_BUF_SIZE,
152e52fb 3193 SECURITY_PROTOCOL_OUT, 0) == 1)
d80210f2
CH		 3194 sdkp->security = 1;
3195}
3196
e815d365
DLM		 3197static inline sector_t sd64_to_sectors(struct scsi_disk *sdkp, u8 *buf)
3198{
3199 return logical_to_sectors(sdkp->device, get_unaligned_be64(buf));
3200}
3201
3202/**
3203 * sd_read_cpr - Query concurrent positioning ranges
3204 * @sdkp: disk to query
3205 */
3206static void sd_read_cpr(struct scsi_disk *sdkp)
3207{
3208 struct blk_independent_access_ranges *iars = NULL;
3209 unsigned char *buffer = NULL;
3210 unsigned int nr_cpr = 0;
3211 int i, vpd_len, buf_len = SD_BUF_SIZE;
3212 u8 *desc;
3213
3214 /*
3215 * We need to have the capacity set first for the block layer to be
3216 * able to check the ranges.
3217 */
3218 if (sdkp->first_scan)
3219 return;
3220
3221 if (!sdkp->capacity)
3222 goto out;
3223
3224 /*
3225 * Concurrent Positioning Ranges VPD: there can be at most 256 ranges,
3226 * leading to a maximum page size of 64 + 256*32 bytes.
3227 */
3228 buf_len = 64 + 256*32;
3229 buffer = kmalloc(buf_len, GFP_KERNEL);
3230 if (!buffer || scsi_get_vpd_page(sdkp->device, 0xb9, buffer, buf_len))
3231 goto out;
3232
3233 /* We must have at least a 64B header and one 32B range descriptor */
f92de9d1 3234 vpd_len = get_unaligned_be16(&buffer[2]) + 4;
e815d365
DLM		 3235 if (vpd_len > buf_len || vpd_len < 64 + 32 || (vpd_len & 31)) {
3236 sd_printk(KERN_ERR, sdkp,
3237 "Invalid Concurrent Positioning Ranges VPD page\n");
3238 goto out;
3239 }
3240
3241 nr_cpr = (vpd_len - 64) / 32;
3242 if (nr_cpr == 1) {
3243 nr_cpr = 0;
3244 goto out;
3245 }
3246
3247 iars = disk_alloc_independent_access_ranges(sdkp->disk, nr_cpr);
3248 if (!iars) {
3249 nr_cpr = 0;
3250 goto out;
3251 }
3252
3253 desc = &buffer[64];
3254 for (i = 0; i < nr_cpr; i++, desc += 32) {
3255 if (desc[0] != i) {
3256 sd_printk(KERN_ERR, sdkp,
3257 "Invalid Concurrent Positioning Range number\n");
3258 nr_cpr = 0;
3259 break;
3260 }
3261
3262 iars->ia_range[i].sector = sd64_to_sectors(sdkp, desc + 8);
3263 iars->ia_range[i].nr_sectors = sd64_to_sectors(sdkp, desc + 16);
3264 }
3265
3266out:
3267 disk_set_independent_access_ranges(sdkp->disk, iars);
3268 if (nr_cpr && sdkp->nr_actuators != nr_cpr) {
3269 sd_printk(KERN_NOTICE, sdkp,
3270 "%u concurrent positioning ranges\n", nr_cpr);
3271 sdkp->nr_actuators = nr_cpr;
3272 }
3273
3274 kfree(buffer);
3275}
3276
631669a2
MP		 3277static bool sd_validate_min_xfer_size(struct scsi_disk *sdkp)
3278{
3279 struct scsi_device *sdp = sdkp->device;
3280 unsigned int min_xfer_bytes =
3281 logical_to_bytes(sdp, sdkp->min_xfer_blocks);
3282
3283 if (sdkp->min_xfer_blocks == 0)
3284 return false;
3285
3286 if (min_xfer_bytes & (sdkp->physical_block_size - 1)) {
3287 sd_first_printk(KERN_WARNING, sdkp,
3288 "Preferred minimum I/O size %u bytes not a " \
3289 "multiple of physical block size (%u bytes)\n",
3290 min_xfer_bytes, sdkp->physical_block_size);
3291 sdkp->min_xfer_blocks = 0;
3292 return false;
3293 }
3294
3295 sd_first_printk(KERN_INFO, sdkp, "Preferred minimum I/O size %u bytes\n",
3296 min_xfer_bytes);
3297 return true;
3298}
3299
a83da8a4
MP		 3300/*
3301 * Determine the device's preferred I/O size for reads and writes
3302 * unless the reported value is unreasonably small, large, not a
3303 * multiple of the physical block size, or simply garbage.
3304 */
3305static bool sd_validate_opt_xfer_size(struct scsi_disk *sdkp,
3306 unsigned int dev_max)
3307{
3308 struct scsi_device *sdp = sdkp->device;
3309 unsigned int opt_xfer_bytes =
3310 logical_to_bytes(sdp, sdkp->opt_xfer_blocks);
631669a2
MP		 3311 unsigned int min_xfer_bytes =
3312 logical_to_bytes(sdp, sdkp->min_xfer_blocks);
a83da8a4 3313
1d5de5bd
MP		 3314 if (sdkp->opt_xfer_blocks == 0)
3315 return false;
3316
a83da8a4
MP		 3317 if (sdkp->opt_xfer_blocks > dev_max) {
3318 sd_first_printk(KERN_WARNING, sdkp,
3319 "Optimal transfer size %u logical blocks " \
3320 "> dev_max (%u logical blocks)\n",
3321 sdkp->opt_xfer_blocks, dev_max);
3322 return false;
3323 }
3324
3325 if (sdkp->opt_xfer_blocks > SD_DEF_XFER_BLOCKS) {
3326 sd_first_printk(KERN_WARNING, sdkp,
3327 "Optimal transfer size %u logical blocks " \
3328 "> sd driver limit (%u logical blocks)\n",
3329 sdkp->opt_xfer_blocks, SD_DEF_XFER_BLOCKS);
3330 return false;
3331 }
3332
3333 if (opt_xfer_bytes < PAGE_SIZE) {
3334 sd_first_printk(KERN_WARNING, sdkp,
3335 "Optimal transfer size %u bytes < " \
3336 "PAGE_SIZE (%u bytes)\n",
3337 opt_xfer_bytes, (unsigned int)PAGE_SIZE);
3338 return false;
3339 }
3340
631669a2
MP		 3341 if (min_xfer_bytes && opt_xfer_bytes % min_xfer_bytes) {
3342 sd_first_printk(KERN_WARNING, sdkp,
3343 "Optimal transfer size %u bytes not a " \
3344 "multiple of preferred minimum block " \
3345 "size (%u bytes)\n",
3346 opt_xfer_bytes, min_xfer_bytes);
3347 return false;
3348 }
3349
a83da8a4
MP		 3350 if (opt_xfer_bytes & (sdkp->physical_block_size - 1)) {
3351 sd_first_printk(KERN_WARNING, sdkp,
3352 "Optimal transfer size %u bytes not a " \
3353 "multiple of physical block size (%u bytes)\n",
3354 opt_xfer_bytes, sdkp->physical_block_size);
3355 return false;
3356 }
3357
3358 sd_first_printk(KERN_INFO, sdkp, "Optimal transfer size %u bytes\n",
3359 opt_xfer_bytes);
3360 return true;
3361}
3362
1da177e4
LT		 3363/**
3364 * sd_revalidate_disk - called the first time a new disk is seen,
3365 * performs disk spin up, read_capacity, etc.
3366 * @disk: struct gendisk we care about
3367 **/
3368static int sd_revalidate_disk(struct gendisk *disk)
3369{
3370 struct scsi_disk *sdkp = scsi_disk(disk);
3371 struct scsi_device *sdp = sdkp->device;
ca369d51 3372 struct request_queue *q = sdkp->disk->queue;
89d94756 3373 sector_t old_capacity = sdkp->capacity;
1da177e4 3374 unsigned char *buffer;
ca369d51 3375 unsigned int dev_max, rw_max;
1da177e4 3376
fa0d34be
MP		 3377 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp,
3378 "sd_revalidate_disk\n"));
1da177e4
LT		 3379
3380 /*
3381 * If the device is offline, don't try and read capacity or any
3382 * of the other niceties.
3383 */
3384 if (!scsi_device_online(sdp))
3385 goto out;
3386
a6123f14 3387 buffer = kmalloc(SD_BUF_SIZE, GFP_KERNEL);
1da177e4 3388 if (!buffer) {
e73aec82
MP		 3389 sd_printk(KERN_WARNING, sdkp, "sd_revalidate_disk: Memory "
3390 "allocation failure.\n");
ea73a9f2 3391 goto out;
1da177e4
LT		 3392 }
3393
e73aec82 3394 sd_spinup_disk(sdkp);
1da177e4
LT		 3395
3396 /*
3397 * Without media there is no reason to ask; moreover, some devices
3398 * react badly if we do.
3399 */
3400 if (sdkp->media_present) {
e73aec82 3401 sd_read_capacity(sdkp, buffer);
ffd4bc2a 3402
e4a05698
JB		 3403 /*
3404 * set the default to rotational. All non-rotational devices
3405 * support the block characteristics VPD page, which will
3406 * cause this to be updated correctly and any device which
3407 * doesn't support it should be treated as rotational.
3408 */
3409 blk_queue_flag_clear(QUEUE_FLAG_NONROT, q);
3410 blk_queue_flag_set(QUEUE_FLAG_ADD_RANDOM, q);
3411
5ddfe085 3412 if (scsi_device_supports_vpd(sdp)) {
c98a0eb0 3413 sd_read_block_provisioning(sdkp);
ffd4bc2a
MP		 3414 sd_read_block_limits(sdkp);
3415 sd_read_block_characteristics(sdkp);
89d94756 3416 sd_zbc_read_zones(sdkp, buffer);
1700714b 3417 sd_read_cpr(sdkp);
ffd4bc2a
MP		 3418 }
3419
89d94756
HR		 3420 sd_print_capacity(sdkp, old_capacity);
3421
e73aec82
MP		 3422 sd_read_write_protect_flag(sdkp, buffer);
3423 sd_read_cache_type(sdkp, buffer);
e0597d70 3424 sd_read_app_tag_own(sdkp, buffer);
5db44863 3425 sd_read_write_same(sdkp, buffer);
d80210f2 3426 sd_read_security(sdkp, buffer);
1e029397 3427 sd_config_protection(sdkp);
1da177e4 3428 }
461d4e90
TH		 3429
3430 /*
3431 * We now have all cache related info, determine how we deal
4913efe4 3432 * with flush requests.
461d4e90 3433 */
cb2fb68d 3434 sd_set_flush_flag(sdkp);
461d4e90 3435
ca369d51
MP		 3436 /* Initial block count limit based on CDB TRANSFER LENGTH field size. */
3437 dev_max = sdp->use_16_for_rw ? SD_MAX_XFER_BLOCKS : SD_DEF_XFER_BLOCKS;
3438
3439 /* Some devices report a maximum block count for READ/WRITE requests. */
3440 dev_max = min_not_zero(dev_max, sdkp->max_xfer_blocks);
3441 q->limits.max_dev_sectors = logical_to_sectors(sdp, dev_max);
3442
631669a2
MP		 3443 if (sd_validate_min_xfer_size(sdkp))
3444 blk_queue_io_min(sdkp->disk->queue,
3445 logical_to_bytes(sdp, sdkp->min_xfer_blocks));
3446 else
3447 blk_queue_io_min(sdkp->disk->queue, 0);
3448
a83da8a4 3449 if (sd_validate_opt_xfer_size(sdkp, dev_max)) {
6b7e9cde
MP		 3450 q->limits.io_opt = logical_to_bytes(sdp, sdkp->opt_xfer_blocks);
3451 rw_max = logical_to_sectors(sdp, sdkp->opt_xfer_blocks);
ea697a8b
MP		 3452 } else {
3453 q->limits.io_opt = 0;
67804145
FZ		 3454 rw_max = min_not_zero(logical_to_sectors(sdp, dev_max),
3455 (sector_t)BLK_DEF_MAX_SECTORS);
ea697a8b 3456 }
3a9794d3 3457
c9337ad4
JG		 3458 /*
3459 * Limit default to SCSI host optimal sector limit if set. There may be
3460 * an impact on performance for when the size of a request exceeds this
3461 * host limit.
3462 */
608128d3
JG		 3463 rw_max = min_not_zero(rw_max, sdp->host->opt_sectors);
3464
77082ca5
MP		 3465 /* Do not exceed controller limit */
3466 rw_max = min(rw_max, queue_max_hw_sectors(q));
3467
3468 /*
3469 * Only update max_sectors if previously unset or if the current value
3470 * exceeds the capabilities of the hardware.
3471 */
3472 if (sdkp->first_scan ||
3473 q->limits.max_sectors > q->limits.max_dev_sectors ||
3474 q->limits.max_sectors > q->limits.max_hw_sectors)
3475 q->limits.max_sectors = rw_max;
3476
3477 sdkp->first_scan = 0;
4f258a46 3478
449f4ec9 3479 set_capacity_and_notify(disk, logical_to_sectors(sdp, sdkp->capacity));
5db44863 3480 sd_config_write_same(sdkp);
1da177e4
LT		 3481 kfree(buffer);
3482
a3d8a257
DLM		 3483 /*
3484 * For a zoned drive, revalidating the zones can be done only once
3485 * the gendisk capacity is set. So if this fails, set back the gendisk
3486 * capacity to 0.
3487 */
3488 if (sd_zbc_revalidate_zones(sdkp))
449f4ec9 3489 set_capacity_and_notify(disk, 0);
a3d8a257 3490
1da177e4
LT		 3491 out:
3492 return 0;
3493}
3494
72ec24bd
TH		 3495/**
3496 * sd_unlock_native_capacity - unlock native capacity
3497 * @disk: struct gendisk to set capacity for
3498 *
3499 * Block layer calls this function if it detects that partitions
3500 * on @disk reach beyond the end of the device. If the SCSI host
3501 * implements ->unlock_native_capacity() method, it's invoked to
3502 * give it a chance to adjust the device capacity.
3503 *
3504 * CONTEXT:
3505 * Defined by block layer. Might sleep.
3506 */
3507static void sd_unlock_native_capacity(struct gendisk *disk)
3508{
3509 struct scsi_device *sdev = scsi_disk(disk)->device;
3510
3511 if (sdev->host->hostt->unlock_native_capacity)
3512 sdev->host->hostt->unlock_native_capacity(sdev);
3513}
3514
3e1a7ff8
TH		 3515/**
3516 * sd_format_disk_name - format disk name
3517 * @prefix: name prefix - ie. "sd" for SCSI disks
3518 * @index: index of the disk to format name for
3519 * @buf: output buffer
3520 * @buflen: length of the output buffer
3521 *
3522 * SCSI disk names starts at sda. The 26th device is sdz and the
3523 * 27th is sdaa. The last one for two lettered suffix is sdzz
3524 * which is followed by sdaaa.
3525 *
3526 * This is basically 26 base counting with one extra 'nil' entry
3ad2f3fb 3527 * at the beginning from the second digit on and can be
3e1a7ff8
TH		 3528 * determined using similar method as 26 base conversion with the
3529 * index shifted -1 after each digit is computed.
3530 *
3531 * CONTEXT:
3532 * Don't care.
3533 *
3534 * RETURNS:
3535 * 0 on success, -errno on failure.
3536 */
3537static int sd_format_disk_name(char *prefix, int index, char *buf, int buflen)
3538{
3539 const int base = 'z' - 'a' + 1;
3540 char *begin = buf + strlen(prefix);
3541 char *end = buf + buflen;
3542 char *p;
3543 int unit;
3544
3545 p = end - 1;
3546 *p = '\0';
3547 unit = base;
3548 do {
3549 if (p == begin)
3550 return -EINVAL;
3551 *--p = 'a' + (index % unit);
3552 index = (index / unit) - 1;
3553 } while (index >= 0);
3554
3555 memmove(begin, p, end - p);
3556 memcpy(buf, prefix, strlen(prefix));
3557
3558 return 0;
3559}
3560
1da177e4
LT		 3561/**
3562 * sd_probe - called during driver initialization and whenever a
3563 * new scsi device is attached to the system. It is called once
3564 * for each scsi device (not just disks) present.
3565 * @dev: pointer to device object
3566 *
3567 * Returns 0 if successful (or not interested in this scsi device
3568 * (e.g. scanner)); 1 when there is an error.
3569 *
3570 * Note: this function is invoked from the scsi mid-level.
3571 * This function sets up the mapping between a given
3572 * <host,channel,id,lun> (found in sdp) and new device name
3573 * (e.g. /dev/sda). More precisely it is the block device major
3574 * and minor number that is chosen here.
3575 *
2db93ce8
PU		 3576 * Assume sd_probe is not re-entrant (for time being)
3577 * Also think about sd_probe() and sd_remove() running coincidentally.
1da177e4
LT		 3578 **/
3579static int sd_probe(struct device *dev)
3580{
3581 struct scsi_device *sdp = to_scsi_device(dev);
3582 struct scsi_disk *sdkp;
3583 struct gendisk *gd;
439d77f7 3584 int index;
1da177e4
LT		 3585 int error;
3586
6fe8c1db 3587 scsi_autopm_get_device(sdp);
1da177e4 3588 error = -ENODEV;
89d94756
HR		 3589 if (sdp->type != TYPE_DISK &&
3590 sdp->type != TYPE_ZBC &&
3591 sdp->type != TYPE_MOD &&
3592 sdp->type != TYPE_RBC)
1da177e4
LT		 3593 goto out;
3594
bf1b4659
DLM		 3595 if (!IS_ENABLED(CONFIG_BLK_DEV_ZONED) && sdp->type == TYPE_ZBC) {
3596 sdev_printk(KERN_WARNING, sdp,
3597 "Unsupported ZBC host-managed device.\n");
89d94756 3598 goto out;
bf1b4659
DLM		 3599 }
3600
9ccfc756 3601 SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO, sdp,
2db93ce8 3602 "sd_probe\n"));
1da177e4
LT		 3603
3604 error = -ENOMEM;
24669f75 3605 sdkp = kzalloc(sizeof(*sdkp), GFP_KERNEL);
1da177e4
LT		 3606 if (!sdkp)
3607 goto out;
3608
6f8191fd
CH		 3609 gd = blk_mq_alloc_disk_for_queue(sdp->request_queue,
3610 &sd_bio_compl_lkclass);
1da177e4 3611 if (!gd)
c01228db 3612 goto out_free;
1da177e4 3613
94015080
MW		 3614 index = ida_alloc(&sd_index_ida, GFP_KERNEL);
3615 if (index < 0) {
21208ae5 3616 sdev_printk(KERN_WARNING, sdp, "sd_probe: memory exhausted.\n");
1da177e4 3617 goto out_put;
1a03ae0f
MR		 3618 }
3619
3e1a7ff8 3620 error = sd_format_disk_name("sd", index, gd->disk_name, DISK_NAME_LEN);
21208ae5
DK		 3621 if (error) {
3622 sdev_printk(KERN_WARNING, sdp, "SCSI disk (sd) name length exceeded.\n");
f27bac27 3623 goto out_free_index;
21208ae5 3624 }
f27bac27 3625
1da177e4 3626 sdkp->device = sdp;
1da177e4
LT		 3627 sdkp->disk = gd;
3628 sdkp->index = index;
0610959f 3629 sdkp->max_retries = SD_MAX_RETRIES;
409f3499 3630 atomic_set(&sdkp->openers, 0);
9e1a1537 3631 atomic_set(&sdkp->device->ioerr_cnt, 0);
1da177e4 3632
601e7638
JB		 3633 if (!sdp->request_queue->rq_timeout) {
3634 if (sdp->type != TYPE_MOD)
3635 blk_queue_rq_timeout(sdp->request_queue, SD_TIMEOUT);
3636 else
3637 blk_queue_rq_timeout(sdp->request_queue,
3638 SD_MOD_TIMEOUT);
3639 }
3640
fad45c30
CH		 3641 device_initialize(&sdkp->disk_dev);
3642 sdkp->disk_dev.parent = get_device(dev);
3643 sdkp->disk_dev.class = &sd_disk_class;
3644 dev_set_name(&sdkp->disk_dev, "%s", dev_name(dev));
601e7638 3645
fad45c30 3646 error = device_add(&sdkp->disk_dev);
265dfe8e 3647 if (error) {
fad45c30 3648 put_device(&sdkp->disk_dev);
265dfe8e
ML		 3649 goto out;
3650 }
601e7638 3651
478a8a05 3652 dev_set_drvdata(dev, sdkp);
601e7638 3653
82a54da6
BVA		 3654 gd->major = sd_major((index & 0xf0) >> 4);
3655 gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00);
a58bd768 3656 gd->minors = SD_MINORS;
82a54da6
BVA		 3657
3658 gd->fops = &sd_fops;
e7f76552 3659 gd->private_data = sdkp;
82a54da6
BVA		 3660
3661 /* defaults, until the device tells us otherwise */
3662 sdp->sector_size = 512;
3663 sdkp->capacity = 0;
3664 sdkp->media_present = 1;
3665 sdkp->write_prot = 0;
3666 sdkp->cache_override = 0;
3667 sdkp->WCE = 0;
3668 sdkp->RCD = 0;
3669 sdkp->ATO = 0;
3670 sdkp->first_scan = 1;
3671 sdkp->max_medium_access_timeouts = SD_MAX_MEDIUM_TIMEOUTS;
3672
3673 sd_revalidate_disk(gd);
3674
82a54da6
BVA		 3675 if (sdp->removable) {
3676 gd->flags |= GENHD_FL_REMOVABLE;
3677 gd->events |= DISK_EVENT_MEDIA_CHANGE;
3678 gd->event_flags = DISK_EVENT_FLAG_POLL | DISK_EVENT_FLAG_UEVENT;
3679 }
3680
3681 blk_pm_runtime_init(sdp->request_queue, dev);
c74f8056
SC		 3682 if (sdp->rpm_autosuspend) {
3683 pm_runtime_set_autosuspend_delay(dev,
3684 sdp->host->hostt->rpm_autosuspend_delay);
3685 }
2a7a891f
LC		 3686
3687 error = device_add_disk(dev, gd, NULL);
3688 if (error) {
fad45c30 3689 put_device(&sdkp->disk_dev);
7274ce05 3690 put_disk(gd);
2a7a891f
LC		 3691 goto out;
3692 }
3693
82a54da6 3694 if (sdkp->security) {
0610959f 3695 sdkp->opal_dev = init_opal_dev(sdkp, &sd_sec_submit);
82a54da6
BVA		 3696 if (sdkp->opal_dev)
3697 sd_printk(KERN_NOTICE, sdkp, "supports TCG Opal\n");
3698 }
3699
3700 sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n",
3701 sdp->removable ? "removable " : "");
3702 scsi_autopm_put_device(sdp);
1da177e4
LT		 3703
3704 return 0;
3705
f27bac27 3706 out_free_index:
94015080 3707 ida_free(&sd_index_ida, index);
6bdaa1f1 3708 out_put:
1da177e4 3709 put_disk(gd);
f170396c
CIK		 3710 out_free:
3711 kfree(sdkp);
6bdaa1f1 3712 out:
6fe8c1db 3713 scsi_autopm_put_device(sdp);
1da177e4
LT		 3714 return error;
3715}
3716
3717/**
3718 * sd_remove - called whenever a scsi disk (previously recognized by
3719 * sd_probe) is detached from the system. It is called (potentially
3720 * multiple times) during sd module unload.
f2a3313d 3721 * @dev: pointer to device object
1da177e4
LT		 3722 *
3723 * Note: this function is invoked from the scsi mid-level.
3724 * This function potentially frees up a device name (e.g. /dev/sdc)
3725 * that could be re-used by a subsequent sd_probe().
3726 * This function is not called when the built-in sd driver is "exit-ed".
3727 **/
3728static int sd_remove(struct device *dev)
3729{
9c63f7f6 3730 struct scsi_disk *sdkp = dev_get_drvdata(dev);
1da177e4 3731
478a8a05
AS		 3732 scsi_autopm_get_device(sdkp->device);
3733
fad45c30 3734 device_del(&sdkp->disk_dev);
1da177e4
LT		 3735 del_gendisk(sdkp->disk);
3736 sd_shutdown(dev);
39b7f1e2 3737
9c63f7f6 3738 put_disk(sdkp->disk);
1da177e4
LT		 3739 return 0;
3740}
3741
ee959b00 3742static void scsi_disk_release(struct device *dev)
1da177e4 3743{
ee959b00 3744 struct scsi_disk *sdkp = to_scsi_disk(dev);
c14a5726 3745
94015080 3746 ida_free(&sd_index_ida, sdkp->index);
30c4fdc3 3747 sd_zbc_free_zone_info(sdkp);
c76c46fa 3748 put_device(&sdkp->device->sdev_gendev);
534cf52a 3749 free_opal_dev(sdkp->opal_dev);
5795eb44 3750
1da177e4
LT		 3751 kfree(sdkp);
3752}
3753
cc5d2c8c 3754static int sd_start_stop_device(struct scsi_disk *sdkp, int start)
c3c94c5a
TH		 3755{
3756 unsigned char cmd[6] = { START_STOP }; /* START_VALID */
785538bf 3757 struct scsi_sense_hdr sshdr;
af16cd63
MC		 3758 const struct scsi_exec_args exec_args = {
3759 .sshdr = &sshdr,
3760 .req_flags = BLK_MQ_REQ_PM,
3761 };
cc5d2c8c 3762 struct scsi_device *sdp = sdkp->device;
785538bf 3763 int res;
c3c94c5a
TH		 3764
3765 if (start)
3766 cmd[4] |= 1; /* START */
3767
d2886ea3
SR		 3768 if (sdp->start_stop_pwr_cond)
3769 cmd[4] |= start ? 1 << 4 : 3 << 4; /* Active or Standby */
3770
c3c94c5a
TH		 3771 if (!scsi_device_online(sdp))
3772 return -ENODEV;
3773
af16cd63
MC		 3774 res = scsi_execute_cmd(sdp, cmd, REQ_OP_DRV_IN, NULL, 0, SD_TIMEOUT,
3775 sdkp->max_retries, &exec_args);
785538bf
BVA		 3776 if (res) {
3777 sd_print_result(sdkp, "Start/Stop Unit failed", res);
3778 if (res > 0 && scsi_sense_valid(&sshdr)) {
3779 sd_print_sense_hdr(sdkp, &sshdr);
3780 /* 0x3a is medium not present */
3781 if (sshdr.asc == 0x3a)
3782 res = 0;
3783 }
3784 }
c3c94c5a 3785
785538bf
BVA		 3786 /* SCSI error codes must not go to the generic layer */
3787 if (res)
3788 return -EIO;
3789
3790 return 0;
c3c94c5a
TH		 3791}
3792
1da177e4
LT		 3793/*
3794 * Send a SYNCHRONIZE CACHE instruction down to the device through
3795 * the normal SCSI command structure. Wait for the command to
3796 * complete.
3797 */
3798static void sd_shutdown(struct device *dev)
3799{
3d9a1f53 3800 struct scsi_disk *sdkp = dev_get_drvdata(dev);
1da177e4
LT		 3801
3802 if (!sdkp)
3803 return; /* this can happen */
3804
54f57588 3805 if (pm_runtime_suspended(dev))
3d9a1f53 3806 return;
54f57588 3807
95897910 3808 if (sdkp->WCE && sdkp->media_present) {
e73aec82 3809 sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n");
4fa83244 3810 sd_sync_cache(sdkp, NULL);
39b7f1e2 3811 }
c3c94c5a 3812
cc5d2c8c
JB		 3813 if (system_state != SYSTEM_RESTART && sdkp->device->manage_start_stop) {
3814 sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n");
3815 sd_start_stop_device(sdkp, 0);
c3c94c5a 3816 }
39b7f1e2 3817}
1da177e4 3818
95897910 3819static int sd_suspend_common(struct device *dev, bool ignore_stop_errors)
c3c94c5a 3820{
3d9a1f53 3821 struct scsi_disk *sdkp = dev_get_drvdata(dev);
4fa83244 3822 struct scsi_sense_hdr sshdr;
09ff92fe 3823 int ret = 0;
c3c94c5a 3824
13b43891
AS		 3825 if (!sdkp) /* E.g.: runtime suspend following sd_remove() */
3826 return 0;
c3c94c5a 3827
95897910 3828 if (sdkp->WCE && sdkp->media_present) {
af4edb1d
AH		 3829 if (!sdkp->device->silence_suspend)
3830 sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n");
4fa83244
DB		 3831 ret = sd_sync_cache(sdkp, &sshdr);
3832
95897910
ON		 3833 if (ret) {
3834 /* ignore OFFLINE device */
3835 if (ret == -ENODEV)
4fa83244
DB		 3836 return 0;
3837
3838 if (!scsi_sense_valid(&sshdr) ||
3839 sshdr.sense_key != ILLEGAL_REQUEST)
3840 return ret;
3841
3842 /*
3843 * sshdr.sense_key == ILLEGAL_REQUEST means this drive
3844 * doesn't support sync. There's not much to do and
3845 * suspend shouldn't fail.
3846 */
ed91f7ed 3847 ret = 0;
95897910 3848 }
c3c94c5a
TH		 3849 }
3850
691e3d31 3851 if (sdkp->device->manage_start_stop) {
af4edb1d
AH		 3852 if (!sdkp->device->silence_suspend)
3853 sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n");
95897910 3854 /* an error is not worth aborting a system sleep */
cc5d2c8c 3855 ret = sd_start_stop_device(sdkp, 0);
95897910
ON		 3856 if (ignore_stop_errors)
3857 ret = 0;
c3c94c5a
TH		 3858 }
3859
09ff92fe 3860 return ret;
c3c94c5a
TH		 3861}
3862
95897910
ON		 3863static int sd_suspend_system(struct device *dev)
3864{
9131bff6
BVA		 3865 if (pm_runtime_suspended(dev))
3866 return 0;
3867
95897910
ON		 3868 return sd_suspend_common(dev, true);
3869}
3870
3871static int sd_suspend_runtime(struct device *dev)
3872{
3873 return sd_suspend_common(dev, false);
3874}
3875
c3c94c5a
TH		 3876static int sd_resume(struct device *dev)
3877{
3d9a1f53 3878 struct scsi_disk *sdkp = dev_get_drvdata(dev);
d80210f2 3879 int ret;
c3c94c5a 3880
13b43891
AS		 3881 if (!sdkp) /* E.g.: runtime resume at the start of sd_probe() */
3882 return 0;
3883
cc5d2c8c 3884 if (!sdkp->device->manage_start_stop)
3d9a1f53 3885 return 0;
c3c94c5a 3886
cc5d2c8c 3887 sd_printk(KERN_NOTICE, sdkp, "Starting disk\n");
d80210f2
CH		 3888 ret = sd_start_stop_device(sdkp, 1);
3889 if (!ret)
3890 opal_unlock_from_suspend(sdkp->opal_dev);
3891 return ret;
c3c94c5a
TH		 3892}
3893
1c957532
BVA		 3894static int sd_resume_system(struct device *dev)
3895{
9131bff6
BVA		 3896 if (pm_runtime_suspended(dev))
3897 return 0;
3898
1c957532
BVA		 3899 return sd_resume(dev);
3900}
3901
ed4246d3
MK		 3902static int sd_resume_runtime(struct device *dev)
3903{
3904 struct scsi_disk *sdkp = dev_get_drvdata(dev);
85374b63
MC		 3905 struct scsi_device *sdp;
3906
3907 if (!sdkp) /* E.g.: runtime resume at the start of sd_probe() */
3908 return 0;
3909
3910 sdp = sdkp->device;
ed4246d3
MK		 3911
3912 if (sdp->ignore_media_change) {
3913 /* clear the device's sense data */
3914 static const u8 cmd[10] = { REQUEST_SENSE };
af16cd63
MC		 3915 const struct scsi_exec_args exec_args = {
3916 .req_flags = BLK_MQ_REQ_PM,
3917 };
ed4246d3 3918
af16cd63
MC		 3919 if (scsi_execute_cmd(sdp, cmd, REQ_OP_DRV_IN, NULL, 0,
3920 sdp->request_queue->rq_timeout, 1,
3921 &exec_args))
ed4246d3
MK		 3922 sd_printk(KERN_NOTICE, sdkp,
3923 "Failed to clear sense data\n");
3924 }
3925
3926 return sd_resume(dev);
3927}
3928
1da177e4
LT		 3929/**
3930 * init_sd - entry point for this driver (both when built in or when
3931 * a module).
3932 *
3933 * Note: this function registers this driver with the scsi mid-level.
3934 **/
3935static int __init init_sd(void)
3936{
5e4009ba 3937 int majors = 0, i, err;
1da177e4
LT		 3938
3939 SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n"));
3940
0761df9c 3941 for (i = 0; i < SD_MAJORS; i++) {
996e509b 3942 if (__register_blkdev(sd_major(i), "sd", sd_default_probe))
0761df9c
HR		 3943 continue;
3944 majors++;
0761df9c 3945 }
1da177e4
LT		 3946
3947 if (!majors)
3948 return -ENODEV;
3949
5e4009ba
JG		 3950 err = class_register(&sd_disk_class);
3951 if (err)
3952 goto err_out;
6bdaa1f1 3953
61cce6f6
JA		 3954 sd_page_pool = mempool_create_page_pool(SD_MEMPOOL_SIZE, 0);
3955 if (!sd_page_pool) {
3956 printk(KERN_ERR "sd: can't init discard page pool\n");
3957 err = -ENOMEM;
2b379516 3958 goto err_out_class;
61cce6f6
JA		 3959 }
3960
afd5e34b
JD		 3961 err = scsi_register_driver(&sd_template.gendrv);
3962 if (err)
3963 goto err_out_driver;
3964
5e4009ba
JG		 3965 return 0;
3966
afd5e34b 3967err_out_driver:
61cce6f6 3968 mempool_destroy(sd_page_pool);
5e4009ba
JG		 3969err_out_class:
3970 class_unregister(&sd_disk_class);
3971err_out:
3972 for (i = 0; i < SD_MAJORS; i++)
3973 unregister_blkdev(sd_major(i), "sd");
3974 return err;
1da177e4
LT		 3975}
3976
3977/**
3978 * exit_sd - exit point for this driver (when it is a module).
3979 *
3980 * Note: this function unregisters this driver from the scsi mid-level.
3981 **/
3982static void __exit exit_sd(void)
3983{
3984 int i;
3985
3986 SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n"));
3987
afd5e34b 3988 scsi_unregister_driver(&sd_template.gendrv);
61cce6f6 3989 mempool_destroy(sd_page_pool);
4e7392ec 3990
5e4009ba
JG		 3991 class_unregister(&sd_disk_class);
3992
996e509b 3993 for (i = 0; i < SD_MAJORS; i++)
1da177e4
LT		 3994 unregister_blkdev(sd_major(i), "sd");
3995}
3996
1da177e4
LT		 3997module_init(init_sd);
3998module_exit(exit_sd);
e73aec82 3999
a35989a0 4000void sd_print_sense_hdr(struct scsi_disk *sdkp, struct scsi_sense_hdr *sshdr)
e73aec82 4001{
21045519
HR		 4002 scsi_print_sense_hdr(sdkp->device,
4003 sdkp->disk ? sdkp->disk->disk_name : NULL, sshdr);
e73aec82
MP		 4004}
4005
a35989a0 4006void sd_print_result(const struct scsi_disk *sdkp, const char *msg, int result)
e73aec82 4007{
ef61329d 4008 const char *hb_string = scsi_hostbyte_string(result);
ef61329d 4009
54c29086 4010 if (hb_string)
ef61329d
HR		 4011 sd_printk(KERN_INFO, sdkp,
4012 "%s: Result: hostbyte=%s driverbyte=%s\n", msg,
4013 hb_string ? hb_string : "invalid",
54c29086 4014 "DRIVER_OK");
ef61329d
HR		 4015 else
4016 sd_printk(KERN_INFO, sdkp,
54c29086
HR		 4017 "%s: Result: hostbyte=0x%02x driverbyte=%s\n",
4018 msg, host_byte(result), "DRIVER_OK");
e73aec82 4019}
Linux 6.x block layer and io_uring tree(s)