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Merge tag 'driver-core-6.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-block.git] / drivers / scsi / sd.c
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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 107static void sd_shutdown(struct device *);
7b3d9545 108static void sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer);
ee959b00 109static void scsi_disk_release(struct device *cdev);
7b3d9545 110
f27bac27 111static DEFINE_IDA(sd_index_ida);
1da177e4 112
61cce6f6 113static mempool_t *sd_page_pool;
9c2b9dba 114static struct lock_class_key sd_bio_compl_lkclass;
4e7392ec 115
6bdaa1f1
JB		 116static const char *sd_cache_types[] = {
117 "write through", "none", "write back",
118 "write back, no read (daft)"
119};
120
cb2fb68d
VC		 121static void sd_set_flush_flag(struct scsi_disk *sdkp)
122{
eb310e23 123 bool wc = false, fua = false;
cb2fb68d
VC		 124
125 if (sdkp->WCE) {
eb310e23 126 wc = true;
cb2fb68d 127 if (sdkp->DPOFUA)
eb310e23 128 fua = true;
cb2fb68d
VC		 129 }
130
eb310e23 131 blk_queue_write_cache(sdkp->disk->queue, wc, fua);
cb2fb68d
VC		 132}
133
ee959b00 134static ssize_t
e1ea2351
GKH		 135cache_type_store(struct device *dev, struct device_attribute *attr,
136 const char *buf, size_t count)
6bdaa1f1 137{
4c11712a 138 int ct, rcd, wce, sp;
ee959b00 139 struct scsi_disk *sdkp = to_scsi_disk(dev);
6bdaa1f1
JB		 140 struct scsi_device *sdp = sdkp->device;
141 char buffer[64];
142 char *buffer_data;
143 struct scsi_mode_data data;
144 struct scsi_sense_hdr sshdr;
2ee3e26c 145 static const char temp[] = "temporary ";
c8b7ef36 146 int len, ret;
6bdaa1f1 147
89d94756 148 if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC)
6bdaa1f1
JB		 149 /* no cache control on RBC devices; theoretically they
150 * can do it, but there's probably so many exceptions
151 * it's not worth the risk */
152 return -EINVAL;
153
39c60a09
JB		 154 if (strncmp(buf, temp, sizeof(temp) - 1) == 0) {
155 buf += sizeof(temp) - 1;
156 sdkp->cache_override = 1;
157 } else {
158 sdkp->cache_override = 0;
159 }
160
4c11712a 161 ct = sysfs_match_string(sd_cache_types, buf);
6bdaa1f1
JB		 162 if (ct < 0)
163 return -EINVAL;
4c11712a 164
6bdaa1f1 165 rcd = ct & 0x01 ? 1 : 0;
2eefd57b 166 wce = (ct & 0x02) && !sdkp->write_prot ? 1 : 0;
39c60a09
JB		 167
168 if (sdkp->cache_override) {
169 sdkp->WCE = wce;
170 sdkp->RCD = rcd;
cb2fb68d 171 sd_set_flush_flag(sdkp);
39c60a09
JB		 172 return count;
173 }
174
a6cdc35f 175 if (scsi_mode_sense(sdp, 0x08, 8, 0, buffer, sizeof(buffer), SD_TIMEOUT,
0610959f 176 sdkp->max_retries, &data, NULL))
6bdaa1f1 177 return -EINVAL;
a9312fb8 178 len = min_t(size_t, sizeof(buffer), data.length - data.header_length -
6bdaa1f1
JB		 179 data.block_descriptor_length);
180 buffer_data = buffer + data.header_length +
181 data.block_descriptor_length;
182 buffer_data[2] &= ~0x05;
183 buffer_data[2] |= wce << 2 | rcd;
184 sp = buffer_data[0] & 0x80 ? 1 : 0;
2c5d16d6 185 buffer_data[0] &= ~0x80;
6bdaa1f1 186
44759979
IM		 187 /*
188 * Ensure WP, DPOFUA, and RESERVED fields are cleared in
189 * received mode parameter buffer before doing MODE SELECT.
190 */
191 data.device_specific = 0;
192
c8b7ef36
MC		 193 ret = scsi_mode_select(sdp, 1, sp, buffer_data, len, SD_TIMEOUT,
194 sdkp->max_retries, &data, &sshdr);
195 if (ret) {
196 if (ret > 0 && scsi_sense_valid(&sshdr))
e73aec82 197 sd_print_sense_hdr(sdkp, &sshdr);
6bdaa1f1
JB		 198 return -EINVAL;
199 }
033a1b98 200 sd_revalidate_disk(sdkp->disk);
6bdaa1f1
JB		 201 return count;
202}
203
ee959b00 204static ssize_t
3cc2ffe5
DLM		 205manage_start_stop_show(struct device *dev,
206 struct device_attribute *attr, char *buf)
e1ea2351
GKH		 207{
208 struct scsi_disk *sdkp = to_scsi_disk(dev);
209 struct scsi_device *sdp = sdkp->device;
210
3cc2ffe5
DLM		 211 return sysfs_emit(buf, "%u\n",
212 sdp->manage_system_start_stop &&
24eca2dc
DLM		 213 sdp->manage_runtime_start_stop &&
214 sdp->manage_shutdown);
e1ea2351 215}
3cc2ffe5 216static DEVICE_ATTR_RO(manage_start_stop);
e1ea2351
GKH		 217
218static ssize_t
3cc2ffe5
DLM		 219manage_system_start_stop_show(struct device *dev,
220 struct device_attribute *attr, char *buf)
221{
222 struct scsi_disk *sdkp = to_scsi_disk(dev);
223 struct scsi_device *sdp = sdkp->device;
224
225 return sysfs_emit(buf, "%u\n", sdp->manage_system_start_stop);
226}
227
228static ssize_t
229manage_system_start_stop_store(struct device *dev,
230 struct device_attribute *attr,
231 const char *buf, size_t count)
c3c94c5a 232{
ee959b00 233 struct scsi_disk *sdkp = to_scsi_disk(dev);
c3c94c5a 234 struct scsi_device *sdp = sdkp->device;
623401ee 235 bool v;
c3c94c5a
TH		 236
237 if (!capable(CAP_SYS_ADMIN))
238 return -EACCES;
239
623401ee 240 if (kstrtobool(buf, &v))
241 return -EINVAL;
242
3cc2ffe5 243 sdp->manage_system_start_stop = v;
c3c94c5a
TH		 244
245 return count;
246}
3cc2ffe5
DLM		 247static DEVICE_ATTR_RW(manage_system_start_stop);
248
249static ssize_t
250manage_runtime_start_stop_show(struct device *dev,
251 struct device_attribute *attr, char *buf)
252{
253 struct scsi_disk *sdkp = to_scsi_disk(dev);
254 struct scsi_device *sdp = sdkp->device;
255
256 return sysfs_emit(buf, "%u\n", sdp->manage_runtime_start_stop);
257}
258
259static ssize_t
260manage_runtime_start_stop_store(struct device *dev,
261 struct device_attribute *attr,
262 const char *buf, size_t count)
263{
264 struct scsi_disk *sdkp = to_scsi_disk(dev);
265 struct scsi_device *sdp = sdkp->device;
266 bool v;
267
268 if (!capable(CAP_SYS_ADMIN))
269 return -EACCES;
270
271 if (kstrtobool(buf, &v))
272 return -EINVAL;
273
274 sdp->manage_runtime_start_stop = v;
275
276 return count;
277}
278static DEVICE_ATTR_RW(manage_runtime_start_stop);
c3c94c5a 279
24eca2dc
DLM		 280static ssize_t manage_shutdown_show(struct device *dev,
281 struct device_attribute *attr, char *buf)
282{
283 struct scsi_disk *sdkp = to_scsi_disk(dev);
284 struct scsi_device *sdp = sdkp->device;
285
286 return sysfs_emit(buf, "%u\n", sdp->manage_shutdown);
287}
288
289static ssize_t manage_shutdown_store(struct device *dev,
290 struct device_attribute *attr,
291 const char *buf, size_t count)
292{
293 struct scsi_disk *sdkp = to_scsi_disk(dev);
294 struct scsi_device *sdp = sdkp->device;
295 bool v;
296
297 if (!capable(CAP_SYS_ADMIN))
298 return -EACCES;
299
300 if (kstrtobool(buf, &v))
301 return -EINVAL;
302
303 sdp->manage_shutdown = v;
304
305 return count;
306}
307static DEVICE_ATTR_RW(manage_shutdown);
308
ee959b00 309static ssize_t
e1ea2351
GKH		 310allow_restart_show(struct device *dev, struct device_attribute *attr, char *buf)
311{
312 struct scsi_disk *sdkp = to_scsi_disk(dev);
313
4c11712a 314 return sprintf(buf, "%u\n", sdkp->device->allow_restart);
e1ea2351
GKH		 315}
316
317static ssize_t
318allow_restart_store(struct device *dev, struct device_attribute *attr,
319 const char *buf, size_t count)
a144c5ae 320{
658e9a6d 321 bool v;
ee959b00 322 struct scsi_disk *sdkp = to_scsi_disk(dev);
a144c5ae
BK		 323 struct scsi_device *sdp = sdkp->device;
324
325 if (!capable(CAP_SYS_ADMIN))
326 return -EACCES;
327
89d94756 328 if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC)
a144c5ae
BK		 329 return -EINVAL;
330
658e9a6d 331 if (kstrtobool(buf, &v))
332 return -EINVAL;
333
334 sdp->allow_restart = v;
a144c5ae
BK		 335
336 return count;
337}
e1ea2351 338static DEVICE_ATTR_RW(allow_restart);
a144c5ae 339
ee959b00 340static ssize_t
e1ea2351 341cache_type_show(struct device *dev, struct device_attribute *attr, char *buf)
6bdaa1f1 342{
ee959b00 343 struct scsi_disk *sdkp = to_scsi_disk(dev);
6bdaa1f1
JB		 344 int ct = sdkp->RCD + 2*sdkp->WCE;
345
4c11712a 346 return sprintf(buf, "%s\n", sd_cache_types[ct]);
6bdaa1f1 347}
e1ea2351 348static DEVICE_ATTR_RW(cache_type);
6bdaa1f1 349
ee959b00 350static ssize_t
e1ea2351 351FUA_show(struct device *dev, struct device_attribute *attr, char *buf)
6bdaa1f1 352{
ee959b00 353 struct scsi_disk *sdkp = to_scsi_disk(dev);
6bdaa1f1 354
4c11712a 355 return sprintf(buf, "%u\n", sdkp->DPOFUA);
6bdaa1f1 356}
e1ea2351 357static DEVICE_ATTR_RO(FUA);
6bdaa1f1 358
ee959b00 359static ssize_t
e1ea2351
GKH		 360protection_type_show(struct device *dev, struct device_attribute *attr,
361 char *buf)
e0597d70
MP		 362{
363 struct scsi_disk *sdkp = to_scsi_disk(dev);
364
4c11712a 365 return sprintf(buf, "%u\n", sdkp->protection_type);
e0597d70
MP		 366}
367
8172499a 368static ssize_t
e1ea2351
GKH		 369protection_type_store(struct device *dev, struct device_attribute *attr,
370 const char *buf, size_t count)
8172499a
MP		 371{
372 struct scsi_disk *sdkp = to_scsi_disk(dev);
373 unsigned int val;
374 int err;
375
376 if (!capable(CAP_SYS_ADMIN))
377 return -EACCES;
378
379 err = kstrtouint(buf, 10, &val);
380
381 if (err)
382 return err;
383
830cc351 384 if (val <= T10_PI_TYPE3_PROTECTION)
8172499a
MP		 385 sdkp->protection_type = val;
386
387 return count;
388}
e1ea2351 389static DEVICE_ATTR_RW(protection_type);
8172499a 390
518fa8e3 391static ssize_t
e1ea2351
GKH		 392protection_mode_show(struct device *dev, struct device_attribute *attr,
393 char *buf)
518fa8e3
MP		 394{
395 struct scsi_disk *sdkp = to_scsi_disk(dev);
396 struct scsi_device *sdp = sdkp->device;
397 unsigned int dif, dix;
398
399 dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type);
400 dix = scsi_host_dix_capable(sdp->host, sdkp->protection_type);
401
8475c811 402 if (!dix && scsi_host_dix_capable(sdp->host, T10_PI_TYPE0_PROTECTION)) {
518fa8e3
MP		 403 dif = 0;
404 dix = 1;
405 }
406
407 if (!dif && !dix)
4c11712a 408 return sprintf(buf, "none\n");
518fa8e3 409
4c11712a 410 return sprintf(buf, "%s%u\n", dix ? "dix" : "dif", dif);
518fa8e3 411}
e1ea2351 412static DEVICE_ATTR_RO(protection_mode);
518fa8e3 413
e0597d70 414static ssize_t
e1ea2351 415app_tag_own_show(struct device *dev, struct device_attribute *attr, char *buf)
e0597d70
MP		 416{
417 struct scsi_disk *sdkp = to_scsi_disk(dev);
418
4c11712a 419 return sprintf(buf, "%u\n", sdkp->ATO);
e0597d70 420}
e1ea2351 421static DEVICE_ATTR_RO(app_tag_own);
e0597d70 422
e339c1a7 423static ssize_t
e1ea2351
GKH		 424thin_provisioning_show(struct device *dev, struct device_attribute *attr,
425 char *buf)
e339c1a7
MP		 426{
427 struct scsi_disk *sdkp = to_scsi_disk(dev);
428
4c11712a 429 return sprintf(buf, "%u\n", sdkp->lbpme);
c98a0eb0 430}
e1ea2351 431static DEVICE_ATTR_RO(thin_provisioning);
c98a0eb0 432
4c11712a 433/* sysfs_match_string() requires dense arrays */
c98a0eb0
MP		 434static const char *lbp_mode[] = {
435 [SD_LBP_FULL] = "full",
436 [SD_LBP_UNMAP] = "unmap",
437 [SD_LBP_WS16] = "writesame_16",
438 [SD_LBP_WS10] = "writesame_10",
439 [SD_LBP_ZERO] = "writesame_zero",
440 [SD_LBP_DISABLE] = "disabled",
441};
442
443static ssize_t
e1ea2351
GKH		 444provisioning_mode_show(struct device *dev, struct device_attribute *attr,
445 char *buf)
c98a0eb0
MP		 446{
447 struct scsi_disk *sdkp = to_scsi_disk(dev);
448
4c11712a 449 return sprintf(buf, "%s\n", lbp_mode[sdkp->provisioning_mode]);
c98a0eb0
MP		 450}
451
452static ssize_t
e1ea2351
GKH		 453provisioning_mode_store(struct device *dev, struct device_attribute *attr,
454 const char *buf, size_t count)
c98a0eb0
MP		 455{
456 struct scsi_disk *sdkp = to_scsi_disk(dev);
457 struct scsi_device *sdp = sdkp->device;
4c11712a 458 int mode;
c98a0eb0
MP		 459
460 if (!capable(CAP_SYS_ADMIN))
461 return -EACCES;
462
89d94756
HR		 463 if (sd_is_zoned(sdkp)) {
464 sd_config_discard(sdkp, SD_LBP_DISABLE);
465 return count;
466 }
467
c98a0eb0
MP		 468 if (sdp->type != TYPE_DISK)
469 return -EINVAL;
470
4c11712a
MP		 471 mode = sysfs_match_string(lbp_mode, buf);
472 if (mode < 0)
c98a0eb0
MP		 473 return -EINVAL;
474
4c11712a
MP		 475 sd_config_discard(sdkp, mode);
476
c98a0eb0 477 return count;
e339c1a7 478}
e1ea2351 479static DEVICE_ATTR_RW(provisioning_mode);
e339c1a7 480
4c11712a 481/* sysfs_match_string() requires dense arrays */
e6bd9312
MP		 482static const char *zeroing_mode[] = {
483 [SD_ZERO_WRITE] = "write",
484 [SD_ZERO_WS] = "writesame",
485 [SD_ZERO_WS16_UNMAP] = "writesame_16_unmap",
486 [SD_ZERO_WS10_UNMAP] = "writesame_10_unmap",
487};
488
489static ssize_t
490zeroing_mode_show(struct device *dev, struct device_attribute *attr,
491 char *buf)
492{
493 struct scsi_disk *sdkp = to_scsi_disk(dev);
494
4c11712a 495 return sprintf(buf, "%s\n", zeroing_mode[sdkp->zeroing_mode]);
e6bd9312
MP		 496}
497
498static ssize_t
499zeroing_mode_store(struct device *dev, struct device_attribute *attr,
500 const char *buf, size_t count)
501{
502 struct scsi_disk *sdkp = to_scsi_disk(dev);
4c11712a 503 int mode;
e6bd9312
MP		 504
505 if (!capable(CAP_SYS_ADMIN))
506 return -EACCES;
507
4c11712a
MP		 508 mode = sysfs_match_string(zeroing_mode, buf);
509 if (mode < 0)
e6bd9312
MP		 510 return -EINVAL;
511
4c11712a
MP		 512 sdkp->zeroing_mode = mode;
513
e6bd9312
MP		 514 return count;
515}
516static DEVICE_ATTR_RW(zeroing_mode);
517
18a4d0a2 518static ssize_t
e1ea2351
GKH		 519max_medium_access_timeouts_show(struct device *dev,
520 struct device_attribute *attr, char *buf)
18a4d0a2
MP		 521{
522 struct scsi_disk *sdkp = to_scsi_disk(dev);
523
4c11712a 524 return sprintf(buf, "%u\n", sdkp->max_medium_access_timeouts);
18a4d0a2
MP		 525}
526
527static ssize_t
e1ea2351
GKH		 528max_medium_access_timeouts_store(struct device *dev,
529 struct device_attribute *attr, const char *buf,
530 size_t count)
18a4d0a2
MP		 531{
532 struct scsi_disk *sdkp = to_scsi_disk(dev);
533 int err;
534
535 if (!capable(CAP_SYS_ADMIN))
536 return -EACCES;
537
538 err = kstrtouint(buf, 10, &sdkp->max_medium_access_timeouts);
539
540 return err ? err : count;
541}
e1ea2351 542static DEVICE_ATTR_RW(max_medium_access_timeouts);
18a4d0a2 543
5db44863 544static ssize_t
e1ea2351
GKH		 545max_write_same_blocks_show(struct device *dev, struct device_attribute *attr,
546 char *buf)
5db44863
MP		 547{
548 struct scsi_disk *sdkp = to_scsi_disk(dev);
549
4c11712a 550 return sprintf(buf, "%u\n", sdkp->max_ws_blocks);
5db44863
MP		 551}
552
553static ssize_t
e1ea2351
GKH		 554max_write_same_blocks_store(struct device *dev, struct device_attribute *attr,
555 const char *buf, size_t count)
5db44863
MP		 556{
557 struct scsi_disk *sdkp = to_scsi_disk(dev);
558 struct scsi_device *sdp = sdkp->device;
559 unsigned long max;
560 int err;
561
562 if (!capable(CAP_SYS_ADMIN))
563 return -EACCES;
564
89d94756 565 if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC)
5db44863
MP		 566 return -EINVAL;
567
568 err = kstrtoul(buf, 10, &max);
569
570 if (err)
571 return err;
572
573 if (max == 0)
574 sdp->no_write_same = 1;
66c28f97
MP		 575 else if (max <= SD_MAX_WS16_BLOCKS) {
576 sdp->no_write_same = 0;
5db44863 577 sdkp->max_ws_blocks = max;
66c28f97 578 }
5db44863
MP		 579
580 sd_config_write_same(sdkp);
581
582 return count;
583}
e1ea2351
GKH		 584static DEVICE_ATTR_RW(max_write_same_blocks);
585
c5f88522
DLM		 586static ssize_t
587zoned_cap_show(struct device *dev, struct device_attribute *attr, char *buf)
588{
589 struct scsi_disk *sdkp = to_scsi_disk(dev);
590
591 if (sdkp->device->type == TYPE_ZBC)
592 return sprintf(buf, "host-managed\n");
593 if (sdkp->zoned == 1)
594 return sprintf(buf, "host-aware\n");
595 if (sdkp->zoned == 2)
596 return sprintf(buf, "drive-managed\n");
597 return sprintf(buf, "none\n");
598}
599static DEVICE_ATTR_RO(zoned_cap);
600
0610959f
MC		 601static ssize_t
602max_retries_store(struct device *dev, struct device_attribute *attr,
603 const char *buf, size_t count)
604{
605 struct scsi_disk *sdkp = to_scsi_disk(dev);
606 struct scsi_device *sdev = sdkp->device;
607 int retries, err;
608
609 err = kstrtoint(buf, 10, &retries);
610 if (err)
611 return err;
612
613 if (retries == SCSI_CMD_RETRIES_NO_LIMIT || retries <= SD_MAX_RETRIES) {
614 sdkp->max_retries = retries;
615 return count;
616 }
617
618 sdev_printk(KERN_ERR, sdev, "max_retries must be between -1 and %d\n",
619 SD_MAX_RETRIES);
620 return -EINVAL;
621}
622
623static ssize_t
624max_retries_show(struct device *dev, struct device_attribute *attr,
625 char *buf)
626{
627 struct scsi_disk *sdkp = to_scsi_disk(dev);
628
629 return sprintf(buf, "%d\n", sdkp->max_retries);
630}
631
632static DEVICE_ATTR_RW(max_retries);
633
e1ea2351
GKH		 634static struct attribute *sd_disk_attrs[] = {
635 &dev_attr_cache_type.attr,
636 &dev_attr_FUA.attr,
637 &dev_attr_allow_restart.attr,
638 &dev_attr_manage_start_stop.attr,
3cc2ffe5
DLM		 639 &dev_attr_manage_system_start_stop.attr,
640 &dev_attr_manage_runtime_start_stop.attr,
24eca2dc 641 &dev_attr_manage_shutdown.attr,
e1ea2351
GKH		 642 &dev_attr_protection_type.attr,
643 &dev_attr_protection_mode.attr,
644 &dev_attr_app_tag_own.attr,
645 &dev_attr_thin_provisioning.attr,
646 &dev_attr_provisioning_mode.attr,
e6bd9312 647 &dev_attr_zeroing_mode.attr,
e1ea2351
GKH		 648 &dev_attr_max_write_same_blocks.attr,
649 &dev_attr_max_medium_access_timeouts.attr,
c5f88522 650 &dev_attr_zoned_cap.attr,
0610959f 651 &dev_attr_max_retries.attr,
e1ea2351 652 NULL,
6bdaa1f1 653};
e1ea2351 654ATTRIBUTE_GROUPS(sd_disk);
6bdaa1f1
JB		 655
656static struct class sd_disk_class = {
657 .name = "scsi_disk",
ee959b00 658 .dev_release = scsi_disk_release,
e1ea2351 659 .dev_groups = sd_disk_groups,
6bdaa1f1 660};
1da177e4 661
0761df9c 662/*
996e509b
CH		 663 * Don't request a new module, as that could deadlock in multipath
664 * environment.
0761df9c 665 */
996e509b 666static void sd_default_probe(dev_t devt)
0761df9c 667{
0761df9c
HR		 668}
669
1da177e4
LT		 670/*
671 * Device no to disk mapping:
672 *
673 * major disc2 disc p1
674 * |............|.............|....|....| <- dev_t
675 * 31 20 19 8 7 4 3 0
676 *
677 * Inside a major, we have 16k disks, however mapped non-
678 * contiguously. The first 16 disks are for major0, the next
679 * ones with major1, ... Disk 256 is for major0 again, disk 272
680 * for major1, ...
681 * As we stay compatible with our numbering scheme, we can reuse
682 * the well-know SCSI majors 8, 65--71, 136--143.
683 */
684static int sd_major(int major_idx)
685{
686 switch (major_idx) {
687 case 0:
688 return SCSI_DISK0_MAJOR;
689 case 1 ... 7:
690 return SCSI_DISK1_MAJOR + major_idx - 1;
691 case 8 ... 15:
692 return SCSI_DISK8_MAJOR + major_idx - 8;
693 default:
694 BUG();
695 return 0; /* shut up gcc */
696 }
697}
698
d80210f2
CH		 699#ifdef CONFIG_BLK_SED_OPAL
700static int sd_sec_submit(void *data, u16 spsp, u8 secp, void *buffer,
701 size_t len, bool send)
702{
0610959f
MC		 703 struct scsi_disk *sdkp = data;
704 struct scsi_device *sdev = sdkp->device;
d80210f2 705 u8 cdb[12] = { 0, };
af16cd63
MC		 706 const struct scsi_exec_args exec_args = {
707 .req_flags = BLK_MQ_REQ_PM,
708 };
d80210f2
CH		 709 int ret;
710
711 cdb[0] = send ? SECURITY_PROTOCOL_OUT : SECURITY_PROTOCOL_IN;
712 cdb[1] = secp;
713 put_unaligned_be16(spsp, &cdb[2]);
714 put_unaligned_be32(len, &cdb[6]);
715
af16cd63
MC		 716 ret = scsi_execute_cmd(sdev, cdb, send ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN,
717 buffer, len, SD_TIMEOUT, sdkp->max_retries,
718 &exec_args);
d80210f2
CH		 719 return ret <= 0 ? ret : -EIO;
720}
721#endif /* CONFIG_BLK_SED_OPAL */
722
082c2cd2
JG		 723/*
724 * Look up the DIX operation based on whether the command is read or
725 * write and whether dix and dif are enabled.
726 */
727static unsigned int sd_prot_op(bool write, bool dix, bool dif)
728{
729 /* Lookup table: bit 2 (write), bit 1 (dix), bit 0 (dif) */
730 static const unsigned int ops[] = { /* wrt dix dif */
731 SCSI_PROT_NORMAL, /* 0 0 0 */
732 SCSI_PROT_READ_STRIP, /* 0 0 1 */
733 SCSI_PROT_READ_INSERT, /* 0 1 0 */
734 SCSI_PROT_READ_PASS, /* 0 1 1 */
735 SCSI_PROT_NORMAL, /* 1 0 0 */
736 SCSI_PROT_WRITE_INSERT, /* 1 0 1 */
737 SCSI_PROT_WRITE_STRIP, /* 1 1 0 */
738 SCSI_PROT_WRITE_PASS, /* 1 1 1 */
739 };
740
741 return ops[write << 2 | dix << 1 | dif];
742}
743
744/*
745 * Returns a mask of the protection flags that are valid for a given DIX
746 * operation.
747 */
748static unsigned int sd_prot_flag_mask(unsigned int prot_op)
749{
750 static const unsigned int flag_mask[] = {
751 [SCSI_PROT_NORMAL] = 0,
752
753 [SCSI_PROT_READ_STRIP] = SCSI_PROT_TRANSFER_PI |
754 SCSI_PROT_GUARD_CHECK |
755 SCSI_PROT_REF_CHECK |
756 SCSI_PROT_REF_INCREMENT,
757
758 [SCSI_PROT_READ_INSERT] = SCSI_PROT_REF_INCREMENT |
759 SCSI_PROT_IP_CHECKSUM,
760
761 [SCSI_PROT_READ_PASS] = SCSI_PROT_TRANSFER_PI |
762 SCSI_PROT_GUARD_CHECK |
763 SCSI_PROT_REF_CHECK |
764 SCSI_PROT_REF_INCREMENT |
765 SCSI_PROT_IP_CHECKSUM,
766
767 [SCSI_PROT_WRITE_INSERT] = SCSI_PROT_TRANSFER_PI |
768 SCSI_PROT_REF_INCREMENT,
769
770 [SCSI_PROT_WRITE_STRIP] = SCSI_PROT_GUARD_CHECK |
771 SCSI_PROT_REF_CHECK |
772 SCSI_PROT_REF_INCREMENT |
773 SCSI_PROT_IP_CHECKSUM,
774
775 [SCSI_PROT_WRITE_PASS] = SCSI_PROT_TRANSFER_PI |
776 SCSI_PROT_GUARD_CHECK |
777 SCSI_PROT_REF_CHECK |
778 SCSI_PROT_REF_INCREMENT |
779 SCSI_PROT_IP_CHECKSUM,
780 };
781
782 return flag_mask[prot_op];
783}
784
c611529e
MP		 785static unsigned char sd_setup_protect_cmnd(struct scsi_cmnd *scmd,
786 unsigned int dix, unsigned int dif)
35e1a5d9 787{
5999ccff
BVA		 788 struct request *rq = scsi_cmd_to_rq(scmd);
789 struct bio *bio = rq->bio;
790 unsigned int prot_op = sd_prot_op(rq_data_dir(rq), dix, dif);
c611529e
MP		 791 unsigned int protect = 0;
792
793 if (dix) { /* DIX Type 0, 1, 2, 3 */
794 if (bio_integrity_flagged(bio, BIP_IP_CHECKSUM))
795 scmd->prot_flags |= SCSI_PROT_IP_CHECKSUM;
796
797 if (bio_integrity_flagged(bio, BIP_CTRL_NOCHECK) == false)
798 scmd->prot_flags |= SCSI_PROT_GUARD_CHECK;
799 }
800
8475c811 801 if (dif != T10_PI_TYPE3_PROTECTION) { /* DIX/DIF Type 0, 1, 2 */
c611529e
MP		 802 scmd->prot_flags |= SCSI_PROT_REF_INCREMENT;
803
804 if (bio_integrity_flagged(bio, BIP_CTRL_NOCHECK) == false)
805 scmd->prot_flags |= SCSI_PROT_REF_CHECK;
806 }
807
808 if (dif) { /* DIX/DIF Type 1, 2, 3 */
809 scmd->prot_flags |= SCSI_PROT_TRANSFER_PI;
810
811 if (bio_integrity_flagged(bio, BIP_DISK_NOCHECK))
812 protect = 3 << 5; /* Disable target PI checking */
813 else
814 protect = 1 << 5; /* Enable target PI checking */
35e1a5d9
MP		 815 }
816
817 scsi_set_prot_op(scmd, prot_op);
818 scsi_set_prot_type(scmd, dif);
c611529e
MP		 819 scmd->prot_flags &= sd_prot_flag_mask(prot_op);
820
821 return protect;
35e1a5d9
MP		 822}
823
c98a0eb0
MP		 824static void sd_config_discard(struct scsi_disk *sdkp, unsigned int mode)
825{
826 struct request_queue *q = sdkp->disk->queue;
827 unsigned int logical_block_size = sdkp->device->sector_size;
828 unsigned int max_blocks = 0;
829
bcd069bb
MP		 830 q->limits.discard_alignment =
831 sdkp->unmap_alignment * logical_block_size;
832 q->limits.discard_granularity =
833 max(sdkp->physical_block_size,
834 sdkp->unmap_granularity * logical_block_size);
89730393
MP		 835 sdkp->provisioning_mode = mode;
836
c98a0eb0
MP		 837 switch (mode) {
838
4c11712a 839 case SD_LBP_FULL:
c98a0eb0 840 case SD_LBP_DISABLE:
2bb4cd5c 841 blk_queue_max_discard_sectors(q, 0);
c98a0eb0
MP		 842 return;
843
844 case SD_LBP_UNMAP:
5db44863
MP		 845 max_blocks = min_not_zero(sdkp->max_unmap_blocks,
846 (u32)SD_MAX_WS16_BLOCKS);
c98a0eb0
MP		 847 break;
848
849 case SD_LBP_WS16:
28a0bc41
MP		 850 if (sdkp->device->unmap_limit_for_ws)
851 max_blocks = sdkp->max_unmap_blocks;
852 else
853 max_blocks = sdkp->max_ws_blocks;
854
855 max_blocks = min_not_zero(max_blocks, (u32)SD_MAX_WS16_BLOCKS);
c98a0eb0
MP		 856 break;
857
858 case SD_LBP_WS10:
28a0bc41
MP		 859 if (sdkp->device->unmap_limit_for_ws)
860 max_blocks = sdkp->max_unmap_blocks;
861 else
862 max_blocks = sdkp->max_ws_blocks;
863
864 max_blocks = min_not_zero(max_blocks, (u32)SD_MAX_WS10_BLOCKS);
c98a0eb0
MP		 865 break;
866
867 case SD_LBP_ZERO:
5db44863
MP		 868 max_blocks = min_not_zero(sdkp->max_ws_blocks,
869 (u32)SD_MAX_WS10_BLOCKS);
c98a0eb0
MP		 870 break;
871 }
872
2bb4cd5c 873 blk_queue_max_discard_sectors(q, max_blocks * (logical_block_size >> 9));
c98a0eb0
MP		 874}
875
f1e117cb
CH		 876static void *sd_set_special_bvec(struct request *rq, unsigned int data_len)
877{
878 struct page *page;
879
880 page = mempool_alloc(sd_page_pool, GFP_ATOMIC);
881 if (!page)
882 return NULL;
883 clear_highpage(page);
884 bvec_set_page(&rq->special_vec, page, data_len, 0);
885 rq->rq_flags |= RQF_SPECIAL_PAYLOAD;
886 return bvec_virt(&rq->special_vec);
887}
888
159b2cbf 889static blk_status_t sd_setup_unmap_cmnd(struct scsi_cmnd *cmd)
e339c1a7 890{
6a7b4398 891 struct scsi_device *sdp = cmd->device;
5999ccff 892 struct request *rq = scsi_cmd_to_rq(cmd);
f3fa33ac 893 struct scsi_disk *sdkp = scsi_disk(rq->q->disk);
c6c93fdd
MP		 894 u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq));
895 u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq));
81d926e8 896 unsigned int data_len = 24;
c98a0eb0 897 char *buf;
e339c1a7 898
f1e117cb
CH		 899 buf = sd_set_special_bvec(rq, data_len);
900 if (!buf)
159b2cbf 901 return BLK_STS_RESOURCE;
66ac0280 902
81d926e8
CH		 903 cmd->cmd_len = 10;
904 cmd->cmnd[0] = UNMAP;
905 cmd->cmnd[8] = 24;
e339c1a7 906
81d926e8
CH		 907 put_unaligned_be16(6 + 16, &buf[0]);
908 put_unaligned_be16(16, &buf[2]);
c6c93fdd
MP		 909 put_unaligned_be64(lba, &buf[8]);
910 put_unaligned_be32(nr_blocks, &buf[16]);
e339c1a7 911
0610959f 912 cmd->allowed = sdkp->max_retries;
81d926e8
CH		 913 cmd->transfersize = data_len;
914 rq->timeout = SD_TIMEOUT;
e339c1a7 915
7007e9dd 916 return scsi_alloc_sgtables(cmd);
81d926e8 917}
c98a0eb0 918
159b2cbf
CH		 919static blk_status_t sd_setup_write_same16_cmnd(struct scsi_cmnd *cmd,
920 bool unmap)
81d926e8
CH		 921{
922 struct scsi_device *sdp = cmd->device;
5999ccff 923 struct request *rq = scsi_cmd_to_rq(cmd);
f3fa33ac 924 struct scsi_disk *sdkp = scsi_disk(rq->q->disk);
c6c93fdd
MP		 925 u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq));
926 u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq));
81d926e8 927 u32 data_len = sdp->sector_size;
c98a0eb0 928
f1e117cb 929 if (!sd_set_special_bvec(rq, data_len))
159b2cbf 930 return BLK_STS_RESOURCE;
c98a0eb0 931
81d926e8
CH		 932 cmd->cmd_len = 16;
933 cmd->cmnd[0] = WRITE_SAME_16;
02d26103 934 if (unmap)
6a7b4398 935 cmd->cmnd[1] = 0x8; /* UNMAP */
c6c93fdd
MP		 936 put_unaligned_be64(lba, &cmd->cmnd[2]);
937 put_unaligned_be32(nr_blocks, &cmd->cmnd[10]);
66ac0280 938
0610959f 939 cmd->allowed = sdkp->max_retries;
81d926e8 940 cmd->transfersize = data_len;
02d26103 941 rq->timeout = unmap ? SD_TIMEOUT : SD_WRITE_SAME_TIMEOUT;
c98a0eb0 942
7007e9dd 943 return scsi_alloc_sgtables(cmd);
81d926e8 944}
c98a0eb0 945
159b2cbf
CH		 946static blk_status_t sd_setup_write_same10_cmnd(struct scsi_cmnd *cmd,
947 bool unmap)
81d926e8
CH		 948{
949 struct scsi_device *sdp = cmd->device;
5999ccff 950 struct request *rq = scsi_cmd_to_rq(cmd);
f3fa33ac 951 struct scsi_disk *sdkp = scsi_disk(rq->q->disk);
c6c93fdd
MP		 952 u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq));
953 u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq));
81d926e8 954 u32 data_len = sdp->sector_size;
c98a0eb0 955
f1e117cb 956 if (!sd_set_special_bvec(rq, data_len))
159b2cbf 957 return BLK_STS_RESOURCE;
e339c1a7 958
81d926e8
CH		 959 cmd->cmd_len = 10;
960 cmd->cmnd[0] = WRITE_SAME;
961 if (unmap)
962 cmd->cmnd[1] = 0x8; /* UNMAP */
c6c93fdd
MP		 963 put_unaligned_be32(lba, &cmd->cmnd[2]);
964 put_unaligned_be16(nr_blocks, &cmd->cmnd[7]);
6a7b4398 965
0610959f 966 cmd->allowed = sdkp->max_retries;
81d926e8 967 cmd->transfersize = data_len;
02d26103 968 rq->timeout = unmap ? SD_TIMEOUT : SD_WRITE_SAME_TIMEOUT;
6a7b4398 969
7007e9dd 970 return scsi_alloc_sgtables(cmd);
f1126e95 971}
f9d03f96 972
159b2cbf 973static blk_status_t sd_setup_write_zeroes_cmnd(struct scsi_cmnd *cmd)
02d26103 974{
5999ccff 975 struct request *rq = scsi_cmd_to_rq(cmd);
02d26103 976 struct scsi_device *sdp = cmd->device;
f3fa33ac 977 struct scsi_disk *sdkp = scsi_disk(rq->q->disk);
c6c93fdd
MP		 978 u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq));
979 u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq));
02d26103 980
e4b87837 981 if (!(rq->cmd_flags & REQ_NOUNMAP)) {
e6bd9312
MP		 982 switch (sdkp->zeroing_mode) {
983 case SD_ZERO_WS16_UNMAP:
39051dd8 984 return sd_setup_write_same16_cmnd(cmd, true);
e6bd9312 985 case SD_ZERO_WS10_UNMAP:
39051dd8 986 return sd_setup_write_same10_cmnd(cmd, true);
e4b87837
CH		 987 }
988 }
c98a0eb0 989
e5cc9002
EM		 990 if (sdp->no_write_same) {
991 rq->rq_flags |= RQF_QUIET;
159b2cbf 992 return BLK_STS_TARGET;
e5cc9002 993 }
ed44fd7f 994
c6c93fdd 995 if (sdkp->ws16 || lba > 0xffffffff || nr_blocks > 0xffff)
39051dd8 996 return sd_setup_write_same16_cmnd(cmd, false);
ed44fd7f 997
39051dd8 998 return sd_setup_write_same10_cmnd(cmd, false);
f1126e95
FT		 999}
1000
5db44863
MP		 1001static void sd_config_write_same(struct scsi_disk *sdkp)
1002{
1003 struct request_queue *q = sdkp->disk->queue;
1004 unsigned int logical_block_size = sdkp->device->sector_size;
5db44863
MP		 1005
1006 if (sdkp->device->no_write_same) {
1007 sdkp->max_ws_blocks = 0;
1008 goto out;
1009 }
1010
1011 /* Some devices can not handle block counts above 0xffff despite
1012 * supporting WRITE SAME(16). Consequently we default to 64k
1013 * blocks per I/O unless the device explicitly advertises a
1014 * bigger limit.
1015 */
66c28f97
MP		 1016 if (sdkp->max_ws_blocks > SD_MAX_WS10_BLOCKS)
1017 sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks,
1018 (u32)SD_MAX_WS16_BLOCKS);
1019 else if (sdkp->ws16 || sdkp->ws10 || sdkp->device->no_report_opcodes)
1020 sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks,
1021 (u32)SD_MAX_WS10_BLOCKS);
1022 else {
1023 sdkp->device->no_write_same = 1;
1024 sdkp->max_ws_blocks = 0;
1025 }
5db44863 1026
e6bd9312
MP		 1027 if (sdkp->lbprz && sdkp->lbpws)
1028 sdkp->zeroing_mode = SD_ZERO_WS16_UNMAP;
1029 else if (sdkp->lbprz && sdkp->lbpws10)
1030 sdkp->zeroing_mode = SD_ZERO_WS10_UNMAP;
1031 else if (sdkp->max_ws_blocks)
1032 sdkp->zeroing_mode = SD_ZERO_WS;
1033 else
1034 sdkp->zeroing_mode = SD_ZERO_WRITE;
1035
b7af62a9
DLM		 1036 if (sdkp->max_ws_blocks &&
1037 sdkp->physical_block_size > logical_block_size) {
1038 /*
1039 * Reporting a maximum number of blocks that is not aligned
1040 * on the device physical size would cause a large write same
1041 * request to be split into physically unaligned chunks by
e383e16e
CH		 1042 * __blkdev_issue_write_zeroes() even if the caller of this
1043 * functions took care to align the large request. So make sure
1044 * the maximum reported is aligned to the device physical block
1045 * size. This is only an optional optimization for regular
1046 * disks, but this is mandatory to avoid failure of large write
1047 * same requests directed at sequential write required zones of
1048 * host-managed ZBC disks.
b7af62a9
DLM		 1049 */
1050 sdkp->max_ws_blocks =
1051 round_down(sdkp->max_ws_blocks,
1052 bytes_to_logical(sdkp->device,
1053 sdkp->physical_block_size));
1054 }
1055
5db44863 1056out:
02d26103
CH		 1057 blk_queue_max_write_zeroes_sectors(q, sdkp->max_ws_blocks *
1058 (logical_block_size >> 9));
5db44863
MP		 1059}
1060
159b2cbf 1061static blk_status_t sd_setup_flush_cmnd(struct scsi_cmnd *cmd)
90467c29 1062{
5999ccff 1063 struct request *rq = scsi_cmd_to_rq(cmd);
f3fa33ac 1064 struct scsi_disk *sdkp = scsi_disk(rq->q->disk);
a118c6c1
CH		 1065
1066 /* flush requests don't perform I/O, zero the S/G table */
1067 memset(&cmd->sdb, 0, sizeof(cmd->sdb));
90467c29 1068
42c59077
SK		 1069 if (cmd->device->use_16_for_sync) {
1070 cmd->cmnd[0] = SYNCHRONIZE_CACHE_16;
1071 cmd->cmd_len = 16;
1072 } else {
1073 cmd->cmnd[0] = SYNCHRONIZE_CACHE;
1074 cmd->cmd_len = 10;
1075 }
a118c6c1 1076 cmd->transfersize = 0;
0610959f 1077 cmd->allowed = sdkp->max_retries;
a118c6c1 1078
26b9fd8b 1079 rq->timeout = rq->q->rq_timeout * SD_FLUSH_TIMEOUT_MULTIPLIER;
159b2cbf 1080 return BLK_STS_OK;
90467c29
FT		 1081}
1082
78a02f49
MP		 1083static blk_status_t sd_setup_rw32_cmnd(struct scsi_cmnd *cmd, bool write,
1084 sector_t lba, unsigned int nr_blocks,
e59e80cf 1085 unsigned char flags, unsigned int dld)
1da177e4 1086{
78a02f49 1087 cmd->cmd_len = SD_EXT_CDB_SIZE;
78a02f49
MP		 1088 cmd->cmnd[0] = VARIABLE_LENGTH_CMD;
1089 cmd->cmnd[7] = 0x18; /* Additional CDB len */
1090 cmd->cmnd[9] = write ? WRITE_32 : READ_32;
1091 cmd->cmnd[10] = flags;
e59e80cf 1092 cmd->cmnd[11] = dld & 0x07;
78a02f49
MP		 1093 put_unaligned_be64(lba, &cmd->cmnd[12]);
1094 put_unaligned_be32(lba, &cmd->cmnd[20]); /* Expected Indirect LBA */
1095 put_unaligned_be32(nr_blocks, &cmd->cmnd[28]);
1096
1097 return BLK_STS_OK;
1098}
1099
1100static blk_status_t sd_setup_rw16_cmnd(struct scsi_cmnd *cmd, bool write,
1101 sector_t lba, unsigned int nr_blocks,
e59e80cf 1102 unsigned char flags, unsigned int dld)
78a02f49
MP		 1103{
1104 cmd->cmd_len = 16;
1105 cmd->cmnd[0] = write ? WRITE_16 : READ_16;
e59e80cf
DLM		 1106 cmd->cmnd[1] = flags | ((dld >> 2) & 0x01);
1107 cmd->cmnd[14] = (dld & 0x03) << 6;
78a02f49
MP		 1108 cmd->cmnd[15] = 0;
1109 put_unaligned_be64(lba, &cmd->cmnd[2]);
1110 put_unaligned_be32(nr_blocks, &cmd->cmnd[10]);
1111
1112 return BLK_STS_OK;
1113}
1114
1115static blk_status_t sd_setup_rw10_cmnd(struct scsi_cmnd *cmd, bool write,
1116 sector_t lba, unsigned int nr_blocks,
1117 unsigned char flags)
1118{
1119 cmd->cmd_len = 10;
1120 cmd->cmnd[0] = write ? WRITE_10 : READ_10;
1121 cmd->cmnd[1] = flags;
1122 cmd->cmnd[6] = 0;
1123 cmd->cmnd[9] = 0;
1124 put_unaligned_be32(lba, &cmd->cmnd[2]);
1125 put_unaligned_be16(nr_blocks, &cmd->cmnd[7]);
1126
1127 return BLK_STS_OK;
1128}
1129
1130static blk_status_t sd_setup_rw6_cmnd(struct scsi_cmnd *cmd, bool write,
1131 sector_t lba, unsigned int nr_blocks,
1132 unsigned char flags)
1133{
db5db4b9
BVA		 1134 /* Avoid that 0 blocks gets translated into 256 blocks. */
1135 if (WARN_ON_ONCE(nr_blocks == 0))
1136 return BLK_STS_IOERR;
1137
78a02f49
MP		 1138 if (unlikely(flags & 0x8)) {
1139 /*
1140 * This happens only if this drive failed 10byte rw
1141 * command with ILLEGAL_REQUEST during operation and
1142 * thus turned off use_10_for_rw.
1143 */
1144 scmd_printk(KERN_ERR, cmd, "FUA write on READ/WRITE(6) drive\n");
1145 return BLK_STS_IOERR;
1146 }
1147
1148 cmd->cmd_len = 6;
1149 cmd->cmnd[0] = write ? WRITE_6 : READ_6;
1150 cmd->cmnd[1] = (lba >> 16) & 0x1f;
1151 cmd->cmnd[2] = (lba >> 8) & 0xff;
1152 cmd->cmnd[3] = lba & 0xff;
1153 cmd->cmnd[4] = nr_blocks;
1154 cmd->cmnd[5] = 0;
1155
1156 return BLK_STS_OK;
1157}
1158
e59e80cf
DLM		 1159/*
1160 * Check if a command has a duration limit set. If it does, and the target
1161 * device supports CDL and the feature is enabled, return the limit
1162 * descriptor index to use. Return 0 (no limit) otherwise.
1163 */
1164static int sd_cdl_dld(struct scsi_disk *sdkp, struct scsi_cmnd *scmd)
1165{
1166 struct scsi_device *sdp = sdkp->device;
1167 int hint;
1168
1169 if (!sdp->cdl_supported || !sdp->cdl_enable)
1170 return 0;
1171
1172 /*
1173 * Use "no limit" if the request ioprio does not specify a duration
1174 * limit hint.
1175 */
1176 hint = IOPRIO_PRIO_HINT(req_get_ioprio(scsi_cmd_to_rq(scmd)));
1177 if (hint < IOPRIO_HINT_DEV_DURATION_LIMIT_1 ||
1178 hint > IOPRIO_HINT_DEV_DURATION_LIMIT_7)
1179 return 0;
1180
1181 return (hint - IOPRIO_HINT_DEV_DURATION_LIMIT_1) + 1;
1182}
1183
cf64e5a5 1184static blk_status_t sd_setup_read_write_cmnd(struct scsi_cmnd *cmd)
1da177e4 1185{
5999ccff 1186 struct request *rq = scsi_cmd_to_rq(cmd);
cf64e5a5 1187 struct scsi_device *sdp = cmd->device;
f3fa33ac 1188 struct scsi_disk *sdkp = scsi_disk(rq->q->disk);
ec029758 1189 sector_t lba = sectors_to_logical(sdp, blk_rq_pos(rq));
18351070 1190 sector_t threshold;
ec029758 1191 unsigned int nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq));
ec029758 1192 unsigned int mask = logical_to_sectors(sdp, 1) - 1;
78a02f49
MP		 1193 bool write = rq_data_dir(rq) == WRITE;
1194 unsigned char protect, fua;
e59e80cf 1195 unsigned int dld;
159b2cbf 1196 blk_status_t ret;
0cf9f4e5
XC		 1197 unsigned int dif;
1198 bool dix;
7f9a6bc4 1199
7007e9dd 1200 ret = scsi_alloc_sgtables(cmd);
159b2cbf 1201 if (ret != BLK_STS_OK)
39051dd8 1202 return ret;
7f9a6bc4 1203
7007e9dd 1204 ret = BLK_STS_IOERR;
e249e42d 1205 if (!scsi_device_online(sdp) || sdp->changed) {
cf64e5a5 1206 scmd_printk(KERN_ERR, cmd, "device offline or changed\n");
7007e9dd 1207 goto fail;
1da177e4
LT		 1208 }
1209
f3fa33ac 1210 if (blk_rq_pos(rq) + blk_rq_sectors(rq) > get_capacity(rq->q->disk)) {
cf64e5a5 1211 scmd_printk(KERN_ERR, cmd, "access beyond end of device\n");
7007e9dd 1212 goto fail;
e249e42d
MP		 1213 }
1214
1215 if ((blk_rq_pos(rq) & mask) || (blk_rq_sectors(rq) & mask)) {
cf64e5a5 1216 scmd_printk(KERN_ERR, cmd, "request not aligned to the logical block size\n");
7007e9dd 1217 goto fail;
1da177e4 1218 }
7f9a6bc4 1219
a0899d4d 1220 /*
ec029758
MP		 1221 * Some SD card readers can't handle accesses which touch the
1222 * last one or two logical blocks. Split accesses as needed.
a0899d4d 1223 */
ec029758 1224 threshold = sdkp->capacity - SD_LAST_BUGGY_SECTORS;
18351070 1225
c6c93fdd
MP		 1226 if (unlikely(sdp->last_sector_bug && lba + nr_blocks > threshold)) {
1227 if (lba < threshold) {
18351070 1228 /* Access up to the threshold but not beyond */
c6c93fdd 1229 nr_blocks = threshold - lba;
18351070 1230 } else {
ec029758
MP		 1231 /* Access only a single logical block */
1232 nr_blocks = 1;
18351070
LT		 1233 }
1234 }
a0899d4d 1235
5795eb44
JT		 1236 if (req_op(rq) == REQ_OP_ZONE_APPEND) {
1237 ret = sd_zbc_prepare_zone_append(cmd, &lba, nr_blocks);
1238 if (ret)
7007e9dd 1239 goto fail;
5795eb44
JT		 1240 }
1241
78a02f49 1242 fua = rq->cmd_flags & REQ_FUA ? 0x8 : 0;
cf64e5a5
BVA		 1243 dix = scsi_prot_sg_count(cmd);
1244 dif = scsi_host_dif_capable(cmd->device->host, sdkp->protection_type);
e59e80cf 1245 dld = sd_cdl_dld(sdkp, cmd);
1da177e4 1246
c611529e 1247 if (dif || dix)
cf64e5a5 1248 protect = sd_setup_protect_cmnd(cmd, dix, dif);
af55ff67 1249 else
4e7392ec
MP		 1250 protect = 0;
1251
8475c811 1252 if (protect && sdkp->protection_type == T10_PI_TYPE2_PROTECTION) {
cf64e5a5 1253 ret = sd_setup_rw32_cmnd(cmd, write, lba, nr_blocks,
e59e80cf 1254 protect | fua, dld);
c6c93fdd 1255 } else if (sdp->use_16_for_rw || (nr_blocks > 0xffff)) {
cf64e5a5 1256 ret = sd_setup_rw16_cmnd(cmd, write, lba, nr_blocks,
e59e80cf 1257 protect | fua, dld);
c6c93fdd 1258 } else if ((nr_blocks > 0xff) || (lba > 0x1fffff) ||
e249e42d 1259 sdp->use_10_for_rw || protect) {
cf64e5a5 1260 ret = sd_setup_rw10_cmnd(cmd, write, lba, nr_blocks,
78a02f49 1261 protect | fua);
1da177e4 1262 } else {
cf64e5a5 1263 ret = sd_setup_rw6_cmnd(cmd, write, lba, nr_blocks,
78a02f49 1264 protect | fua);
1da177e4 1265 }
78a02f49
MP		 1266
1267 if (unlikely(ret != BLK_STS_OK))
7007e9dd 1268 goto fail;
1da177e4
LT		 1269
1270 /*
1271 * We shouldn't disconnect in the middle of a sector, so with a dumb
1272 * host adapter, it's safe to assume that we can at least transfer
1273 * this many bytes between each connect / disconnect.
1274 */
cf64e5a5
BVA		 1275 cmd->transfersize = sdp->sector_size;
1276 cmd->underflow = nr_blocks << 9;
0610959f 1277 cmd->allowed = sdkp->max_retries;
cf64e5a5 1278 cmd->sdb.length = nr_blocks * sdp->sector_size;
e249e42d
MP		 1279
1280 SCSI_LOG_HLQUEUE(1,
cf64e5a5 1281 scmd_printk(KERN_INFO, cmd,
e249e42d
MP		 1282 "%s: block=%llu, count=%d\n", __func__,
1283 (unsigned long long)blk_rq_pos(rq),
1284 blk_rq_sectors(rq)));
1285 SCSI_LOG_HLQUEUE(2,
cf64e5a5 1286 scmd_printk(KERN_INFO, cmd,
e249e42d
MP		 1287 "%s %d/%u 512 byte blocks.\n",
1288 write ? "writing" : "reading", nr_blocks,
1289 blk_rq_sectors(rq)));
1da177e4 1290
1da177e4 1291 /*
7007e9dd 1292 * This indicates that the command is ready from our end to be queued.
1da177e4 1293 */
159b2cbf 1294 return BLK_STS_OK;
7007e9dd
CH		 1295fail:
1296 scsi_free_sgtables(cmd);
1297 return ret;
1da177e4
LT		 1298}
1299
159b2cbf 1300static blk_status_t sd_init_command(struct scsi_cmnd *cmd)
87949eee 1301{
5999ccff 1302 struct request *rq = scsi_cmd_to_rq(cmd);
87949eee 1303
c2df40df
MC		 1304 switch (req_op(rq)) {
1305 case REQ_OP_DISCARD:
f3fa33ac 1306 switch (scsi_disk(rq->q->disk)->provisioning_mode) {
81d926e8
CH		 1307 case SD_LBP_UNMAP:
1308 return sd_setup_unmap_cmnd(cmd);
1309 case SD_LBP_WS16:
02d26103 1310 return sd_setup_write_same16_cmnd(cmd, true);
81d926e8
CH		 1311 case SD_LBP_WS10:
1312 return sd_setup_write_same10_cmnd(cmd, true);
1313 case SD_LBP_ZERO:
1314 return sd_setup_write_same10_cmnd(cmd, false);
1315 default:
159b2cbf 1316 return BLK_STS_TARGET;
81d926e8 1317 }
02d26103
CH		 1318 case REQ_OP_WRITE_ZEROES:
1319 return sd_setup_write_zeroes_cmnd(cmd);
3a5e02ce 1320 case REQ_OP_FLUSH:
87949eee 1321 return sd_setup_flush_cmnd(cmd);
c2df40df
MC		 1322 case REQ_OP_READ:
1323 case REQ_OP_WRITE:
5795eb44 1324 case REQ_OP_ZONE_APPEND:
87949eee 1325 return sd_setup_read_write_cmnd(cmd);
89d94756 1326 case REQ_OP_ZONE_RESET:
ad512f20
AJ		 1327 return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_RESET_WRITE_POINTER,
1328 false);
d81e9d49 1329 case REQ_OP_ZONE_RESET_ALL:
ad512f20
AJ		 1330 return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_RESET_WRITE_POINTER,
1331 true);
1332 case REQ_OP_ZONE_OPEN:
1333 return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_OPEN_ZONE, false);
1334 case REQ_OP_ZONE_CLOSE:
1335 return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_CLOSE_ZONE, false);
1336 case REQ_OP_ZONE_FINISH:
1337 return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_FINISH_ZONE, false);
c2df40df 1338 default:
f1f1fada 1339 WARN_ON_ONCE(1);
159b2cbf 1340 return BLK_STS_NOTSUPP;
c2df40df 1341 }
87949eee
CH		 1342}
1343
1344static void sd_uninit_command(struct scsi_cmnd *SCpnt)
1345{
5999ccff 1346 struct request *rq = scsi_cmd_to_rq(SCpnt);
87949eee 1347
f9d03f96 1348 if (rq->rq_flags & RQF_SPECIAL_PAYLOAD)
61cce6f6 1349 mempool_free(rq->special_vec.bv_page, sd_page_pool);
87949eee
CH		 1350}
1351
444aa2c5 1352static bool sd_need_revalidate(struct gendisk *disk, struct scsi_disk *sdkp)
d1b7f920
CH		 1353{
1354 if (sdkp->device->removable || sdkp->write_prot) {
444aa2c5 1355 if (disk_check_media_change(disk))
d1b7f920
CH		 1356 return true;
1357 }
1358
1359 /*
1360 * Force a full rescan after ioctl(BLKRRPART). While the disk state has
1361 * nothing to do with partitions, BLKRRPART is used to force a full
1362 * revalidate after things like a format for historical reasons.
1363 */
444aa2c5 1364 return test_bit(GD_NEED_PART_SCAN, &disk->state);
d1b7f920
CH		 1365}
1366
1da177e4
LT		 1367/**
1368 * sd_open - open a scsi disk device
d32e2bf8 1369 * @disk: disk to open
05bdb996 1370 * @mode: open mode
1da177e4
LT		 1371 *
1372 * Returns 0 if successful. Returns a negated errno value in case
1373 * of error.
1374 *
1375 * Note: This can be called from a user context (e.g. fsck(1) )
1376 * or from within the kernel (e.g. as a result of a mount(1) ).
1377 * In the latter case @inode and @filp carry an abridged amount
1378 * of information as noted above.
409f3499 1379 *
d32e2bf8 1380 * Locking: called with disk->open_mutex held.
1da177e4 1381 **/
05bdb996 1382static int sd_open(struct gendisk *disk, blk_mode_t mode)
1da177e4 1383{
d32e2bf8 1384 struct scsi_disk *sdkp = scsi_disk(disk);
9c63f7f6 1385 struct scsi_device *sdev = sdkp->device;
1da177e4
LT		 1386 int retval;
1387
9c63f7f6 1388 if (scsi_device_get(sdev))
1da177e4
LT		 1389 return -ENXIO;
1390
fa0d34be 1391 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_open\n"));
1da177e4 1392
1da177e4
LT		 1393 /*
1394 * If the device is in error recovery, wait until it is done.
1395 * If the device is offline, then disallow any access to it.
1396 */
1397 retval = -ENXIO;
1398 if (!scsi_block_when_processing_errors(sdev))
1399 goto error_out;
1400
d32e2bf8
CH		 1401 if (sd_need_revalidate(disk, sdkp))
1402 sd_revalidate_disk(disk);
1da177e4
LT		 1403
1404 /*
1405 * If the drive is empty, just let the open fail.
1406 */
1407 retval = -ENOMEDIUM;
05bdb996
CH		 1408 if (sdev->removable && !sdkp->media_present &&
1409 !(mode & BLK_OPEN_NDELAY))
1da177e4
LT		 1410 goto error_out;
1411
1412 /*
1413 * If the device has the write protect tab set, have the open fail
1414 * if the user expects to be able to write to the thing.
1415 */
1416 retval = -EROFS;
05bdb996 1417 if (sdkp->write_prot && (mode & BLK_OPEN_WRITE))
1da177e4
LT		 1418 goto error_out;
1419
1420 /*
1421 * It is possible that the disk changing stuff resulted in
1422 * the device being taken offline. If this is the case,
1423 * report this to the user, and don't pretend that the
1424 * open actually succeeded.
1425 */
1426 retval = -ENXIO;
1427 if (!scsi_device_online(sdev))
1428 goto error_out;
1429
409f3499 1430 if ((atomic_inc_return(&sdkp->openers) == 1) && sdev->removable) {
1da177e4
LT		 1431 if (scsi_block_when_processing_errors(sdev))
1432 scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT);
1433 }
1434
1435 return 0;
1436
1437error_out:
9c63f7f6 1438 scsi_device_put(sdev);
1da177e4
LT		 1439 return retval;
1440}
1441
1442/**
1443 * sd_release - invoked when the (last) close(2) is called on this
1444 * scsi disk.
7529fbb0 1445 * @disk: disk to release
1da177e4
LT		 1446 *
1447 * Returns 0.
1448 *
1449 * Note: may block (uninterruptible) if error recovery is underway
1450 * on this disk.
409f3499 1451 *
05bdb996 1452 * Locking: called with disk->open_mutex held.
1da177e4 1453 **/
ae220766 1454static void sd_release(struct gendisk *disk)
1da177e4 1455{
1da177e4
LT		 1456 struct scsi_disk *sdkp = scsi_disk(disk);
1457 struct scsi_device *sdev = sdkp->device;
1458
56937f7b 1459 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_release\n"));
1da177e4 1460
7e443312 1461 if (atomic_dec_return(&sdkp->openers) == 0 && sdev->removable) {
1da177e4
LT		 1462 if (scsi_block_when_processing_errors(sdev))
1463 scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW);
1464 }
1465
9c63f7f6 1466 scsi_device_put(sdev);
1da177e4
LT		 1467}
1468
a885c8c4 1469static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1da177e4
LT		 1470{
1471 struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk);
1472 struct scsi_device *sdp = sdkp->device;
1473 struct Scsi_Host *host = sdp->host;
f08bb1e0 1474 sector_t capacity = logical_to_sectors(sdp, sdkp->capacity);
1da177e4
LT		 1475 int diskinfo[4];
1476
1477 /* default to most commonly used values */
f08bb1e0
MP		 1478 diskinfo[0] = 0x40; /* 1 << 6 */
1479 diskinfo[1] = 0x20; /* 1 << 5 */
1480 diskinfo[2] = capacity >> 11;
1481
1da177e4
LT		 1482 /* override with calculated, extended default, or driver values */
1483 if (host->hostt->bios_param)
f08bb1e0 1484 host->hostt->bios_param(sdp, bdev, capacity, diskinfo);
1da177e4 1485 else
f08bb1e0 1486 scsicam_bios_param(bdev, capacity, diskinfo);
1da177e4 1487
a885c8c4
CH		 1488 geo->heads = diskinfo[0];
1489 geo->sectors = diskinfo[1];
1490 geo->cylinders = diskinfo[2];
1da177e4
LT		 1491 return 0;
1492}
1493
1494/**
44328310 1495 * sd_ioctl - process an ioctl
7529fbb0 1496 * @bdev: target block device
05bdb996 1497 * @mode: open mode
1da177e4 1498 * @cmd: ioctl command number
44328310 1499 * @arg: this is third argument given to ioctl(2) system call.
1da177e4
LT		 1500 * Often contains a pointer.
1501 *
25985edc 1502 * Returns 0 if successful (some ioctls return positive numbers on
1da177e4
LT		 1503 * success as well). Returns a negated errno value in case of error.
1504 *
1505 * Note: most ioctls are forward onto the block subsystem or further
3a4fa0a2 1506 * down in the scsi subsystem.
1da177e4 1507 **/
05bdb996 1508static int sd_ioctl(struct block_device *bdev, blk_mode_t mode,
44328310 1509 unsigned int cmd, unsigned long arg)
1da177e4 1510{
1da177e4 1511 struct gendisk *disk = bdev->bd_disk;
fe2d1851
NN		 1512 struct scsi_disk *sdkp = scsi_disk(disk);
1513 struct scsi_device *sdp = sdkp->device;
44328310 1514 void __user *p = (void __user *)arg;
1da177e4
LT		 1515 int error;
1516
fe2d1851
NN		 1517 SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO, sdkp, "sd_ioctl: disk=%s, "
1518 "cmd=0x%x\n", disk->disk_name, cmd));
1da177e4 1519
4f07bfc5
CH		 1520 if (bdev_is_partition(bdev) && !capable(CAP_SYS_RAWIO))
1521 return -ENOIOCTLCMD;
0bfc96cb 1522
1da177e4
LT		 1523 /*
1524 * If we are in the middle of error recovery, don't let anyone
1525 * else try and use this device. Also, if error recovery fails, it
1526 * may try and take the device offline, in which case all further
1527 * access to the device is prohibited.
1528 */
906d15fb 1529 error = scsi_ioctl_block_when_processing_errors(sdp, cmd,
05bdb996 1530 (mode & BLK_OPEN_NDELAY));
906d15fb 1531 if (error)
44328310 1532 return error;
1da177e4 1533
d80210f2
CH		 1534 if (is_sed_ioctl(cmd))
1535 return sed_ioctl(sdkp->opal_dev, cmd, p);
05bdb996 1536 return scsi_ioctl(sdp, mode & BLK_OPEN_WRITE, cmd, p);
1da177e4
LT		 1537}
1538
1539static void set_media_not_present(struct scsi_disk *sdkp)
1540{
2bae0093
TH		 1541 if (sdkp->media_present)
1542 sdkp->device->changed = 1;
1543
1544 if (sdkp->device->removable) {
1545 sdkp->media_present = 0;
1546 sdkp->capacity = 0;
1547 }
1548}
1549
1550static int media_not_present(struct scsi_disk *sdkp,
1551 struct scsi_sense_hdr *sshdr)
1552{
1553 if (!scsi_sense_valid(sshdr))
1554 return 0;
1555
1556 /* not invoked for commands that could return deferred errors */
1557 switch (sshdr->sense_key) {
1558 case UNIT_ATTENTION:
1559 case NOT_READY:
1560 /* medium not present */
1561 if (sshdr->asc == 0x3A) {
1562 set_media_not_present(sdkp);
1563 return 1;
1564 }
1565 }
1566 return 0;
1da177e4
LT		 1567}
1568
1569/**
2bae0093
TH		 1570 * sd_check_events - check media events
1571 * @disk: kernel device descriptor
1572 * @clearing: disk events currently being cleared
1da177e4 1573 *
2bae0093 1574 * Returns mask of DISK_EVENT_*.
1da177e4
LT		 1575 *
1576 * Note: this function is invoked from the block subsystem.
1577 **/
2bae0093 1578static unsigned int sd_check_events(struct gendisk *disk, unsigned int clearing)
1da177e4 1579{
9c63f7f6 1580 struct scsi_disk *sdkp = disk->private_data;
eb72d0bb 1581 struct scsi_device *sdp;
1da177e4 1582 int retval;
41e70e30 1583 bool disk_changed;
1da177e4 1584
eb72d0bb
HR		 1585 if (!sdkp)
1586 return 0;
1587
1588 sdp = sdkp->device;
2bae0093 1589 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_check_events\n"));
1da177e4
LT		 1590
1591 /*
1592 * If the device is offline, don't send any commands - just pretend as
1593 * if the command failed. If the device ever comes back online, we
1594 * can deal with it then. It is only because of unrecoverable errors
1595 * that we would ever take a device offline in the first place.
1596 */
285e9670
KS		 1597 if (!scsi_device_online(sdp)) {
1598 set_media_not_present(sdkp);
285e9670
KS		 1599 goto out;
1600 }
1da177e4
LT		 1601
1602 /*
1603 * Using TEST_UNIT_READY enables differentiation between drive with
1604 * no cartridge loaded - NOT READY, drive with changed cartridge -
1605 * UNIT ATTENTION, or with same cartridge - GOOD STATUS.
1606 *
1607 * Drives that auto spin down. eg iomega jaz 1G, will be started
1608 * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever
1609 * sd_revalidate() is called.
1610 */
001aac25 1611 if (scsi_block_when_processing_errors(sdp)) {
6fa2b8f9
CH		 1612 struct scsi_sense_hdr sshdr = { 0, };
1613
0610959f 1614 retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, sdkp->max_retries,
6fa2b8f9 1615 &sshdr);
1da177e4 1616
6fa2b8f9 1617 /* failed to execute TUR, assume media not present */
ced202f7 1618 if (retval < 0 || host_byte(retval)) {
6fa2b8f9
CH		 1619 set_media_not_present(sdkp);
1620 goto out;
1621 }
1da177e4 1622
6fa2b8f9
CH		 1623 if (media_not_present(sdkp, &sshdr))
1624 goto out;
1625 }
2bae0093 1626
1da177e4
LT		 1627 /*
1628 * For removable scsi disk we have to recognise the presence
2bae0093 1629 * of a disk in the drive.
1da177e4 1630 */
2bae0093
TH		 1631 if (!sdkp->media_present)
1632 sdp->changed = 1;
1da177e4 1633 sdkp->media_present = 1;
285e9670 1634out:
3ff5588d 1635 /*
2bae0093 1636 * sdp->changed is set under the following conditions:
3ff5588d 1637 *
2bae0093
TH		 1638 * Medium present state has changed in either direction.
1639 * Device has indicated UNIT_ATTENTION.
3ff5588d 1640 */
41e70e30 1641 disk_changed = sdp->changed;
2bae0093 1642 sdp->changed = 0;
41e70e30 1643 return disk_changed ? DISK_EVENT_MEDIA_CHANGE : 0;
1da177e4
LT		 1644}
1645
3b834863 1646static int sd_sync_cache(struct scsi_disk *sdkp)
1da177e4 1647{
1da177e4 1648 int retries, res;
e73aec82 1649 struct scsi_device *sdp = sdkp->device;
7e660100
JB		 1650 const int timeout = sdp->request_queue->rq_timeout
1651 * SD_FLUSH_TIMEOUT_MULTIPLIER;
3b834863 1652 struct scsi_sense_hdr sshdr;
af16cd63
MC		 1653 const struct scsi_exec_args exec_args = {
1654 .req_flags = BLK_MQ_REQ_PM,
3b834863 1655 .sshdr = &sshdr,
af16cd63 1656 };
1da177e4
LT		 1657
1658 if (!scsi_device_online(sdp))
1659 return -ENODEV;
1660
1da177e4 1661 for (retries = 3; retries > 0; --retries) {
42c59077 1662 unsigned char cmd[16] = { 0 };
1da177e4 1663
42c59077
SK		 1664 if (sdp->use_16_for_sync)
1665 cmd[0] = SYNCHRONIZE_CACHE_16;
1666 else
1667 cmd[0] = SYNCHRONIZE_CACHE;
1da177e4
LT		 1668 /*
1669 * Leave the rest of the command zero to indicate
1670 * flush everything.
1671 */
af16cd63
MC		 1672 res = scsi_execute_cmd(sdp, cmd, REQ_OP_DRV_IN, NULL, 0,
1673 timeout, sdkp->max_retries, &exec_args);
ea73a9f2 1674 if (res == 0)
1da177e4
LT		 1675 break;
1676 }
1677
e73aec82 1678 if (res) {
ef61329d 1679 sd_print_result(sdkp, "Synchronize Cache(10) failed", res);
95897910 1680
ced202f7
HR		 1681 if (res < 0)
1682 return res;
1683
464a00c9 1684 if (scsi_status_is_check_condition(res) &&
3b834863
MC		 1685 scsi_sense_valid(&sshdr)) {
1686 sd_print_sense_hdr(sdkp, &sshdr);
4fa83244 1687
464a00c9 1688 /* we need to evaluate the error return */
3b834863
MC		 1689 if (sshdr.asc == 0x3a || /* medium not present */
1690 sshdr.asc == 0x20 || /* invalid command */
1691 (sshdr.asc == 0x74 && sshdr.ascq == 0x71)) /* drive is password locked */
95897910
ON		 1692 /* this is no error here */
1693 return 0;
3b834863
MC		 1694 /*
1695 * This drive doesn't support sync and there's not much
1696 * we can do because this is called during shutdown
1697 * or suspend so just return success so those operations
1698 * can proceed.
1699 */
1700 if (sshdr.sense_key == ILLEGAL_REQUEST)
1701 return 0;
464a00c9 1702 }
95897910
ON		 1703
1704 switch (host_byte(res)) {
1705 /* ignore errors due to racing a disconnection */
1706 case DID_BAD_TARGET:
1707 case DID_NO_CONNECT:
1708 return 0;
1709 /* signal the upper layer it might try again */
1710 case DID_BUS_BUSY:
1711 case DID_IMM_RETRY:
1712 case DID_REQUEUE:
1713 case DID_SOFT_ERROR:
1714 return -EBUSY;
1715 default:
1716 return -EIO;
1717 }
1da177e4 1718 }
3721050a 1719 return 0;
1da177e4
LT		 1720}
1721
1da177e4
LT		 1722static void sd_rescan(struct device *dev)
1723{
3d9a1f53 1724 struct scsi_disk *sdkp = dev_get_drvdata(dev);
39b7f1e2 1725
b200e38c 1726 sd_revalidate_disk(sdkp->disk);
1da177e4
LT		 1727}
1728
b83ce214
CH		 1729static int sd_get_unique_id(struct gendisk *disk, u8 id[16],
1730 enum blk_unique_id type)
1731{
1732 struct scsi_device *sdev = scsi_disk(disk)->device;
1733 const struct scsi_vpd *vpd;
1734 const unsigned char *d;
1735 int ret = -ENXIO, len;
1736
1737 rcu_read_lock();
1738 vpd = rcu_dereference(sdev->vpd_pg83);
1739 if (!vpd)
1740 goto out_unlock;
1741
1742 ret = -EINVAL;
1743 for (d = vpd->data + 4; d < vpd->data + vpd->len; d += d[3] + 4) {
1744 /* we only care about designators with LU association */
1745 if (((d[1] >> 4) & 0x3) != 0x00)
1746 continue;
1747 if ((d[1] & 0xf) != type)
1748 continue;
1749
1750 /*
1751 * Only exit early if a 16-byte descriptor was found. Otherwise
1752 * keep looking as one with more entropy might still show up.
1753 */
1754 len = d[3];
1755 if (len != 8 && len != 12 && len != 16)
1756 continue;
1757 ret = len;
1758 memcpy(id, d + 4, len);
1759 if (len == 16)
1760 break;
1761 }
1762out_unlock:
1763 rcu_read_unlock();
1764 return ret;
1765}
1766
04b3c8c0
MC		 1767static int sd_scsi_to_pr_err(struct scsi_sense_hdr *sshdr, int result)
1768{
1769 switch (host_byte(result)) {
1770 case DID_TRANSPORT_MARGINAL:
1771 case DID_TRANSPORT_DISRUPTED:
1772 case DID_BUS_BUSY:
1773 return PR_STS_RETRY_PATH_FAILURE;
1774 case DID_NO_CONNECT:
1775 return PR_STS_PATH_FAILED;
1776 case DID_TRANSPORT_FAILFAST:
1777 return PR_STS_PATH_FAST_FAILED;
1778 }
1779
1780 switch (status_byte(result)) {
1781 case SAM_STAT_RESERVATION_CONFLICT:
1782 return PR_STS_RESERVATION_CONFLICT;
1783 case SAM_STAT_CHECK_CONDITION:
1784 if (!scsi_sense_valid(sshdr))
1785 return PR_STS_IOERR;
1786
1787 if (sshdr->sense_key == ILLEGAL_REQUEST &&
1788 (sshdr->asc == 0x26 || sshdr->asc == 0x24))
1789 return -EINVAL;
1790
1791 fallthrough;
1792 default:
1793 return PR_STS_IOERR;
1794 }
1795}
1796
0af7b5e2
MC		 1797static int sd_pr_in_command(struct block_device *bdev, u8 sa,
1798 unsigned char *data, int data_len)
1799{
1800 struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk);
1801 struct scsi_device *sdev = sdkp->device;
1802 struct scsi_sense_hdr sshdr;
1803 u8 cmd[10] = { PERSISTENT_RESERVE_IN, sa };
1804 const struct scsi_exec_args exec_args = {
1805 .sshdr = &sshdr,
1806 };
1807 int result;
1808
1809 put_unaligned_be16(data_len, &cmd[7]);
1810
1811 result = scsi_execute_cmd(sdev, cmd, REQ_OP_DRV_IN, data, data_len,
1812 SD_TIMEOUT, sdkp->max_retries, &exec_args);
1813 if (scsi_status_is_check_condition(result) &&
1814 scsi_sense_valid(&sshdr)) {
1815 sdev_printk(KERN_INFO, sdev, "PR command failed: %d\n", result);
1816 scsi_print_sense_hdr(sdev, NULL, &sshdr);
1817 }
1818
1819 if (result <= 0)
1820 return result;
1821
1822 return sd_scsi_to_pr_err(&sshdr, result);
1823}
1824
1825static int sd_pr_read_keys(struct block_device *bdev, struct pr_keys *keys_info)
1826{
1827 int result, i, data_offset, num_copy_keys;
1828 u32 num_keys = keys_info->num_keys;
1829 int data_len = num_keys * 8 + 8;
1830 u8 *data;
1831
1832 data = kzalloc(data_len, GFP_KERNEL);
1833 if (!data)
1834 return -ENOMEM;
1835
1836 result = sd_pr_in_command(bdev, READ_KEYS, data, data_len);
1837 if (result)
1838 goto free_data;
1839
1840 keys_info->generation = get_unaligned_be32(&data[0]);
1841 keys_info->num_keys = get_unaligned_be32(&data[4]) / 8;
1842
1843 data_offset = 8;
1844 num_copy_keys = min(num_keys, keys_info->num_keys);
1845
1846 for (i = 0; i < num_copy_keys; i++) {
1847 keys_info->keys[i] = get_unaligned_be64(&data[data_offset]);
1848 data_offset += 8;
1849 }
1850
1851free_data:
1852 kfree(data);
1853 return result;
1854}
1855
1856static int sd_pr_read_reservation(struct block_device *bdev,
1857 struct pr_held_reservation *rsv)
1858{
1859 struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk);
1860 struct scsi_device *sdev = sdkp->device;
1861 u8 data[24] = { };
1862 int result, len;
1863
1864 result = sd_pr_in_command(bdev, READ_RESERVATION, data, sizeof(data));
1865 if (result)
1866 return result;
1867
1868 len = get_unaligned_be32(&data[4]);
1869 if (!len)
1870 return 0;
1871
1872 /* Make sure we have at least the key and type */
1873 if (len < 14) {
1874 sdev_printk(KERN_INFO, sdev,
1875 "READ RESERVATION failed due to short return buffer of %d bytes\n",
1876 len);
1877 return -EINVAL;
1878 }
1879
1880 rsv->generation = get_unaligned_be32(&data[0]);
1881 rsv->key = get_unaligned_be64(&data[8]);
1882 rsv->type = scsi_pr_type_to_block(data[21] & 0x0f);
1883 return 0;
1884}
1885
0730b163
MC		 1886static int sd_pr_out_command(struct block_device *bdev, u8 sa, u64 key,
1887 u64 sa_key, enum scsi_pr_type type, u8 flags)
924d55b0 1888{
0610959f
MC		 1889 struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk);
1890 struct scsi_device *sdev = sdkp->device;
924d55b0 1891 struct scsi_sense_hdr sshdr;
af16cd63
MC		 1892 const struct scsi_exec_args exec_args = {
1893 .sshdr = &sshdr,
1894 };
924d55b0
CH		 1895 int result;
1896 u8 cmd[16] = { 0, };
1897 u8 data[24] = { 0, };
1898
1899 cmd[0] = PERSISTENT_RESERVE_OUT;
1900 cmd[1] = sa;
1901 cmd[2] = type;
1902 put_unaligned_be32(sizeof(data), &cmd[5]);
1903
1904 put_unaligned_be64(key, &data[0]);
1905 put_unaligned_be64(sa_key, &data[8]);
1906 data[20] = flags;
1907
af16cd63
MC		 1908 result = scsi_execute_cmd(sdev, cmd, REQ_OP_DRV_OUT, &data,
1909 sizeof(data), SD_TIMEOUT, sdkp->max_retries,
1910 &exec_args);
924d55b0 1911
464a00c9 1912 if (scsi_status_is_check_condition(result) &&
c65be1a6 1913 scsi_sense_valid(&sshdr)) {
924d55b0
CH		 1914 sdev_printk(KERN_INFO, sdev, "PR command failed: %d\n", result);
1915 scsi_print_sense_hdr(sdev, NULL, &sshdr);
1916 }
1917
04b3c8c0
MC		 1918 if (result <= 0)
1919 return result;
1920
1921 return sd_scsi_to_pr_err(&sshdr, result);
924d55b0
CH		 1922}
1923
1924static int sd_pr_register(struct block_device *bdev, u64 old_key, u64 new_key,
1925 u32 flags)
1926{
1927 if (flags & ~PR_FL_IGNORE_KEY)
1928 return -EOPNOTSUPP;
20bebccb 1929 return sd_pr_out_command(bdev, (flags & PR_FL_IGNORE_KEY) ? 0x06 : 0x00,
924d55b0 1930 old_key, new_key, 0,
01f90dd9 1931 (1 << 0) /* APTPL */);
924d55b0
CH		 1932}
1933
1934static int sd_pr_reserve(struct block_device *bdev, u64 key, enum pr_type type,
1935 u32 flags)
1936{
1937 if (flags)
1938 return -EOPNOTSUPP;
0730b163
MC		 1939 return sd_pr_out_command(bdev, 0x01, key, 0,
1940 block_pr_type_to_scsi(type), 0);
924d55b0
CH		 1941}
1942
1943static int sd_pr_release(struct block_device *bdev, u64 key, enum pr_type type)
1944{
0730b163
MC		 1945 return sd_pr_out_command(bdev, 0x02, key, 0,
1946 block_pr_type_to_scsi(type), 0);
924d55b0
CH		 1947}
1948
1949static int sd_pr_preempt(struct block_device *bdev, u64 old_key, u64 new_key,
1950 enum pr_type type, bool abort)
1951{
20bebccb 1952 return sd_pr_out_command(bdev, abort ? 0x05 : 0x04, old_key, new_key,
0730b163 1953 block_pr_type_to_scsi(type), 0);
924d55b0
CH		 1954}
1955
1956static int sd_pr_clear(struct block_device *bdev, u64 key)
1957{
20bebccb 1958 return sd_pr_out_command(bdev, 0x03, key, 0, 0, 0);
924d55b0
CH		 1959}
1960
1961static const struct pr_ops sd_pr_ops = {
1962 .pr_register = sd_pr_register,
1963 .pr_reserve = sd_pr_reserve,
1964 .pr_release = sd_pr_release,
1965 .pr_preempt = sd_pr_preempt,
1966 .pr_clear = sd_pr_clear,
0af7b5e2
MC		 1967 .pr_read_keys = sd_pr_read_keys,
1968 .pr_read_reservation = sd_pr_read_reservation,
924d55b0
CH		 1969};
1970
9c63f7f6
CH		 1971static void scsi_disk_free_disk(struct gendisk *disk)
1972{
1973 struct scsi_disk *sdkp = scsi_disk(disk);
1974
1975 put_device(&sdkp->disk_dev);
1976}
1977
83d5cde4 1978static const struct block_device_operations sd_fops = {
1da177e4 1979 .owner = THIS_MODULE,
0338e291
AV		 1980 .open = sd_open,
1981 .release = sd_release,
8a6cfeb6 1982 .ioctl = sd_ioctl,
a885c8c4 1983 .getgeo = sd_getgeo,
44328310 1984 .compat_ioctl = blkdev_compat_ptr_ioctl,
2bae0093 1985 .check_events = sd_check_events,
72ec24bd 1986 .unlock_native_capacity = sd_unlock_native_capacity,
e76239a3 1987 .report_zones = sd_zbc_report_zones,
b83ce214 1988 .get_unique_id = sd_get_unique_id,
9c63f7f6 1989 .free_disk = scsi_disk_free_disk,
924d55b0 1990 .pr_ops = &sd_pr_ops,
1da177e4
LT		 1991};
1992
7a38dc0b
HR		 1993/**
1994 * sd_eh_reset - reset error handling callback
1995 * @scmd: sd-issued command that has failed
1996 *
1997 * This function is called by the SCSI midlayer before starting
1998 * SCSI EH. When counting medium access failures we have to be
1999 * careful to register it only only once per device and SCSI EH run;
2000 * there might be several timed out commands which will cause the
2001 * 'max_medium_access_timeouts' counter to trigger after the first
2002 * SCSI EH run already and set the device to offline.
2003 * So this function resets the internal counter before starting SCSI EH.
2004 **/
2005static void sd_eh_reset(struct scsi_cmnd *scmd)
2006{
f3fa33ac 2007 struct scsi_disk *sdkp = scsi_disk(scsi_cmd_to_rq(scmd)->q->disk);
7a38dc0b
HR		 2008
2009 /* New SCSI EH run, reset gate variable */
2010 sdkp->ignore_medium_access_errors = false;
2011}
2012
18a4d0a2
MP		 2013/**
2014 * sd_eh_action - error handling callback
2015 * @scmd: sd-issued command that has failed
18a4d0a2
MP		 2016 * @eh_disp: The recovery disposition suggested by the midlayer
2017 *
2451079b
JB		 2018 * This function is called by the SCSI midlayer upon completion of an
2019 * error test command (currently TEST UNIT READY). The result of sending
2020 * the eh command is passed in eh_disp. We're looking for devices that
2021 * fail medium access commands but are OK with non access commands like
2022 * test unit ready (so wrongly see the device as having a successful
2023 * recovery)
18a4d0a2 2024 **/
2451079b 2025static int sd_eh_action(struct scsi_cmnd *scmd, int eh_disp)
18a4d0a2 2026{
f3fa33ac 2027 struct scsi_disk *sdkp = scsi_disk(scsi_cmd_to_rq(scmd)->q->disk);
0db6ca8a 2028 struct scsi_device *sdev = scmd->device;
18a4d0a2 2029
0db6ca8a 2030 if (!scsi_device_online(sdev) ||
2451079b
JB		 2031 !scsi_medium_access_command(scmd) ||
2032 host_byte(scmd->result) != DID_TIME_OUT ||
2033 eh_disp != SUCCESS)
18a4d0a2
MP		 2034 return eh_disp;
2035
2036 /*
2037 * The device has timed out executing a medium access command.
2038 * However, the TEST UNIT READY command sent during error
2039 * handling completed successfully. Either the device is in the
2040 * process of recovering or has it suffered an internal failure
2041 * that prevents access to the storage medium.
2042 */
7a38dc0b
HR		 2043 if (!sdkp->ignore_medium_access_errors) {
2044 sdkp->medium_access_timed_out++;
2045 sdkp->ignore_medium_access_errors = true;
2046 }
18a4d0a2
MP		 2047
2048 /*
2049 * If the device keeps failing read/write commands but TEST UNIT
2050 * READY always completes successfully we assume that medium
2051 * access is no longer possible and take the device offline.
2052 */
2053 if (sdkp->medium_access_timed_out >= sdkp->max_medium_access_timeouts) {
2054 scmd_printk(KERN_ERR, scmd,
2055 "Medium access timeout failure. Offlining disk!\n");
0db6ca8a
BVA		 2056 mutex_lock(&sdev->state_mutex);
2057 scsi_device_set_state(sdev, SDEV_OFFLINE);
2058 mutex_unlock(&sdev->state_mutex);
18a4d0a2 2059
e8f8d50e 2060 return SUCCESS;
18a4d0a2
MP		 2061 }
2062
2063 return eh_disp;
2064}
2065
af55ff67
MP		 2066static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd)
2067{
5999ccff 2068 struct request *req = scsi_cmd_to_rq(scmd);
6eadc612
DLM		 2069 struct scsi_device *sdev = scmd->device;
2070 unsigned int transferred, good_bytes;
2071 u64 start_lba, end_lba, bad_lba;
2072
a8733c7b 2073 /*
6eadc612
DLM		 2074 * Some commands have a payload smaller than the device logical
2075 * block size (e.g. INQUIRY on a 4K disk).
a8733c7b 2076 */
6eadc612 2077 if (scsi_bufflen(scmd) <= sdev->sector_size)
af55ff67
MP		 2078 return 0;
2079
6eadc612
DLM		 2080 /* Check if we have a 'bad_lba' information */
2081 if (!scsi_get_sense_info_fld(scmd->sense_buffer,
2082 SCSI_SENSE_BUFFERSIZE,
2083 &bad_lba))
af55ff67
MP		 2084 return 0;
2085
6eadc612
DLM		 2086 /*
2087 * If the bad lba was reported incorrectly, we have no idea where
af55ff67
MP		 2088 * the error is.
2089 */
6eadc612
DLM		 2090 start_lba = sectors_to_logical(sdev, blk_rq_pos(req));
2091 end_lba = start_lba + bytes_to_logical(sdev, scsi_bufflen(scmd));
2092 if (bad_lba < start_lba || bad_lba >= end_lba)
af55ff67
MP		 2093 return 0;
2094
6eadc612
DLM		 2095 /*
2096 * resid is optional but mostly filled in. When it's unused,
2097 * its value is zero, so we assume the whole buffer transferred
af55ff67 2098 */
6eadc612
DLM		 2099 transferred = scsi_bufflen(scmd) - scsi_get_resid(scmd);
2100
2101 /* This computation should always be done in terms of the
2102 * resolution of the device's medium.
af55ff67 2103 */
6eadc612
DLM		 2104 good_bytes = logical_to_bytes(sdev, bad_lba - start_lba);
2105
a8733c7b 2106 return min(good_bytes, transferred);
af55ff67
MP		 2107}
2108
1da177e4 2109/**
7b3d9545 2110 * sd_done - bottom half handler: called when the lower level
1da177e4
LT		 2111 * driver has completed (successfully or otherwise) a scsi command.
2112 * @SCpnt: mid-level's per command structure.
2113 *
2114 * Note: potentially run from within an ISR. Must not block.
2115 **/
7b3d9545 2116static int sd_done(struct scsi_cmnd *SCpnt)
1da177e4
LT		 2117{
2118 int result = SCpnt->result;
af55ff67 2119 unsigned int good_bytes = result ? 0 : scsi_bufflen(SCpnt);
c46f0917
DLM		 2120 unsigned int sector_size = SCpnt->device->sector_size;
2121 unsigned int resid;
1da177e4 2122 struct scsi_sense_hdr sshdr;
5999ccff 2123 struct request *req = scsi_cmd_to_rq(SCpnt);
f3fa33ac 2124 struct scsi_disk *sdkp = scsi_disk(req->q->disk);
1da177e4
LT		 2125 int sense_valid = 0;
2126 int sense_deferred = 0;
1da177e4 2127
89d94756
HR		 2128 switch (req_op(req)) {
2129 case REQ_OP_DISCARD:
02d26103 2130 case REQ_OP_WRITE_ZEROES:
89d94756 2131 case REQ_OP_ZONE_RESET:
d81e9d49 2132 case REQ_OP_ZONE_RESET_ALL:
ad512f20
AJ		 2133 case REQ_OP_ZONE_OPEN:
2134 case REQ_OP_ZONE_CLOSE:
2135 case REQ_OP_ZONE_FINISH:
26e85fcd
MP		 2136 if (!result) {
2137 good_bytes = blk_rq_bytes(req);
2138 scsi_set_resid(SCpnt, 0);
2139 } else {
2140 good_bytes = 0;
2141 scsi_set_resid(SCpnt, blk_rq_bytes(req));
89d94756
HR		 2142 }
2143 break;
c46f0917
DLM		 2144 default:
2145 /*
2146 * In case of bogus fw or device, we could end up having
2147 * an unaligned partial completion. Check this here and force
2148 * alignment.
2149 */
2150 resid = scsi_get_resid(SCpnt);
2151 if (resid & (sector_size - 1)) {
2152 sd_printk(KERN_INFO, sdkp,
2153 "Unaligned partial completion (resid=%u, sector_sz=%u)\n",
2154 resid, sector_size);
670d8be2 2155 scsi_print_command(SCpnt);
c46f0917
DLM		 2156 resid = min(scsi_bufflen(SCpnt),
2157 round_up(resid, sector_size));
2158 scsi_set_resid(SCpnt, resid);
2159 }
26e85fcd 2160 }
6a32a8ae 2161
1da177e4
LT		 2162 if (result) {
2163 sense_valid = scsi_command_normalize_sense(SCpnt, &sshdr);
2164 if (sense_valid)
2165 sense_deferred = scsi_sense_is_deferred(&sshdr);
2166 }
2a863ba8
DJ		 2167 sdkp->medium_access_timed_out = 0;
2168
464a00c9 2169 if (!scsi_status_is_check_condition(result) &&
03aba2f7
LT		 2170 (!sense_valid || sense_deferred))
2171 goto out;
2172
2173 switch (sshdr.sense_key) {
2174 case HARDWARE_ERROR:
2175 case MEDIUM_ERROR:
af55ff67 2176 good_bytes = sd_completed_bytes(SCpnt);
03aba2f7
LT		 2177 break;
2178 case RECOVERED_ERROR:
af55ff67
MP		 2179 good_bytes = scsi_bufflen(SCpnt);
2180 break;
10dab226
JW		 2181 case NO_SENSE:
2182 /* This indicates a false check condition, so ignore it. An
2183 * unknown amount of data was transferred so treat it as an
2184 * error.
2185 */
10dab226
JW		 2186 SCpnt->result = 0;
2187 memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
2188 break;
c98a0eb0
MP		 2189 case ABORTED_COMMAND:
2190 if (sshdr.asc == 0x10) /* DIF: Target detected corruption */
2191 good_bytes = sd_completed_bytes(SCpnt);
2192 break;
2193 case ILLEGAL_REQUEST:
d227ec26
CH		 2194 switch (sshdr.asc) {
2195 case 0x10: /* DIX: Host detected corruption */
af55ff67 2196 good_bytes = sd_completed_bytes(SCpnt);
d227ec26
CH		 2197 break;
2198 case 0x20: /* INVALID COMMAND OPCODE */
2199 case 0x24: /* INVALID FIELD IN CDB */
2200 switch (SCpnt->cmnd[0]) {
5db44863
MP		 2201 case UNMAP:
2202 sd_config_discard(sdkp, SD_LBP_DISABLE);
2203 break;
2204 case WRITE_SAME_16:
2205 case WRITE_SAME:
d227ec26 2206 if (SCpnt->cmnd[1] & 8) { /* UNMAP */
5db44863 2207 sd_config_discard(sdkp, SD_LBP_DISABLE);
d227ec26 2208 } else {
5db44863
MP		 2209 sdkp->device->no_write_same = 1;
2210 sd_config_write_same(sdkp);
e8064021 2211 req->rq_flags |= RQF_QUIET;
5db44863 2212 }
d227ec26 2213 break;
5db44863
MP		 2214 }
2215 }
03aba2f7
LT		 2216 break;
2217 default:
2218 break;
1da177e4 2219 }
89d94756 2220
03aba2f7 2221 out:
89d94756 2222 if (sd_is_zoned(sdkp))
5795eb44 2223 good_bytes = sd_zbc_complete(SCpnt, good_bytes, &sshdr);
89d94756 2224
ef61329d
HR		 2225 SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO, SCpnt,
2226 "sd_done: completed %d of %d bytes\n",
2227 good_bytes, scsi_bufflen(SCpnt)));
2228
7b3d9545 2229 return good_bytes;
1da177e4
LT		 2230}
2231
1da177e4
LT		 2232/*
2233 * spinup disk - called only in sd_revalidate_disk()
2234 */
2235static void
e73aec82 2236sd_spinup_disk(struct scsi_disk *sdkp)
ea73a9f2 2237{
1da177e4 2238 unsigned char cmd[10];
4451e472 2239 unsigned long spintime_expire = 0;
1da177e4
LT		 2240 int retries, spintime;
2241 unsigned int the_result;
2242 struct scsi_sense_hdr sshdr;
af16cd63
MC		 2243 const struct scsi_exec_args exec_args = {
2244 .sshdr = &sshdr,
2245 };
1da177e4
LT		 2246 int sense_valid = 0;
2247
2248 spintime = 0;
2249
2250 /* Spin up drives, as required. Only do this at boot time */
2251 /* Spinup needs to be done for module loads too. */
2252 do {
2253 retries = 0;
2254
2255 do {
4521428c
HK		 2256 bool media_was_present = sdkp->media_present;
2257
1da177e4
LT		 2258 cmd[0] = TEST_UNIT_READY;
2259 memset((void *) &cmd[1], 0, 9);
2260
af16cd63
MC		 2261 the_result = scsi_execute_cmd(sdkp->device, cmd,
2262 REQ_OP_DRV_IN, NULL, 0,
2263 SD_TIMEOUT,
2264 sdkp->max_retries,
2265 &exec_args);
1da177e4 2266
b4d0c33a
MC		 2267 if (the_result > 0) {
2268 /*
2269 * If the drive has indicated to us that it
2270 * doesn't have any media in it, don't bother
2271 * with any more polling.
2272 */
2273 if (media_not_present(sdkp, &sshdr)) {
2274 if (media_was_present)
2275 sd_printk(KERN_NOTICE, sdkp,
2276 "Media removed, stopped polling\n");
2277 return;
2278 }
b4d38e38 2279
ea73a9f2 2280 sense_valid = scsi_sense_valid(&sshdr);
b4d0c33a 2281 }
1da177e4 2282 retries++;
464a00c9 2283 } while (retries < 3 &&
1da177e4 2284 (!scsi_status_is_good(the_result) ||
464a00c9 2285 (scsi_status_is_check_condition(the_result) &&
1da177e4
LT		 2286 sense_valid && sshdr.sense_key == UNIT_ATTENTION)));
2287
464a00c9 2288 if (!scsi_status_is_check_condition(the_result)) {
1da177e4
LT		 2289 /* no sense, TUR either succeeded or failed
2290 * with a status error */
e73aec82 2291 if(!spintime && !scsi_status_is_good(the_result)) {
ef61329d
HR		 2292 sd_print_result(sdkp, "Test Unit Ready failed",
2293 the_result);
e73aec82 2294 }
1da177e4
LT		 2295 break;
2296 }
ef61329d 2297
1da177e4
LT		 2298 /*
2299 * The device does not want the automatic start to be issued.
2300 */
33dd6f92 2301 if (sdkp->device->no_start_on_add)
1da177e4 2302 break;
1da177e4 2303
33dd6f92
MW		 2304 if (sense_valid && sshdr.sense_key == NOT_READY) {
2305 if (sshdr.asc == 4 && sshdr.ascq == 3)
2306 break; /* manual intervention required */
2307 if (sshdr.asc == 4 && sshdr.ascq == 0xb)
2308 break; /* standby */
2309 if (sshdr.asc == 4 && sshdr.ascq == 0xc)
2310 break; /* unavailable */
505aa4b6
MR		 2311 if (sshdr.asc == 4 && sshdr.ascq == 0x1b)
2312 break; /* sanitize in progress */
2bbeb8d1
DG		 2313 if (sshdr.asc == 4 && sshdr.ascq == 0x24)
2314 break; /* depopulation in progress */
2315 if (sshdr.asc == 4 && sshdr.ascq == 0x25)
2316 break; /* depopulation restoration in progress */
33dd6f92
MW		 2317 /*
2318 * Issue command to spin up drive when not ready
2319 */
1da177e4 2320 if (!spintime) {
e73aec82 2321 sd_printk(KERN_NOTICE, sdkp, "Spinning up disk...");
1da177e4
LT		 2322 cmd[0] = START_STOP;
2323 cmd[1] = 1; /* Return immediately */
2324 memset((void *) &cmd[2], 0, 8);
2325 cmd[4] = 1; /* Start spin cycle */
d2886ea3
SR		 2326 if (sdkp->device->start_stop_pwr_cond)
2327 cmd[4] |= 1 << 4;
af16cd63
MC		 2328 scsi_execute_cmd(sdkp->device, cmd,
2329 REQ_OP_DRV_IN, NULL, 0,
0610959f 2330 SD_TIMEOUT, sdkp->max_retries,
af16cd63 2331 &exec_args);
4451e472
AS		 2332 spintime_expire = jiffies + 100 * HZ;
2333 spintime = 1;
1da177e4 2334 }
1da177e4
LT		 2335 /* Wait 1 second for next try */
2336 msleep(1000);
3a1d0783 2337 printk(KERN_CONT ".");
4451e472
AS		 2338
2339 /*
2340 * Wait for USB flash devices with slow firmware.
2341 * Yes, this sense key/ASC combination shouldn't
2342 * occur here. It's characteristic of these devices.
2343 */
2344 } else if (sense_valid &&
2345 sshdr.sense_key == UNIT_ATTENTION &&
2346 sshdr.asc == 0x28) {
2347 if (!spintime) {
2348 spintime_expire = jiffies + 5 * HZ;
2349 spintime = 1;
2350 }
2351 /* Wait 1 second for next try */
2352 msleep(1000);
1da177e4
LT		 2353 } else {
2354 /* we don't understand the sense code, so it's
2355 * probably pointless to loop */
2356 if(!spintime) {
e73aec82
MP		 2357 sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n");
2358 sd_print_sense_hdr(sdkp, &sshdr);
1da177e4
LT		 2359 }
2360 break;
2361 }
2362
4451e472 2363 } while (spintime && time_before_eq(jiffies, spintime_expire));
1da177e4
LT		 2364
2365 if (spintime) {
2366 if (scsi_status_is_good(the_result))
3a1d0783 2367 printk(KERN_CONT "ready\n");
1da177e4 2368 else
3a1d0783 2369 printk(KERN_CONT "not responding...\n");
1da177e4
LT		 2370 }
2371}
2372
e0597d70
MP		 2373/*
2374 * Determine whether disk supports Data Integrity Field.
2375 */
fe542396 2376static int sd_read_protection_type(struct scsi_disk *sdkp, unsigned char *buffer)
e0597d70
MP		 2377{
2378 struct scsi_device *sdp = sdkp->device;
2379 u8 type;
2380
465f4eda
XC		 2381 if (scsi_device_protection(sdp) == 0 || (buffer[12] & 1) == 0) {
2382 sdkp->protection_type = 0;
1e029397 2383 return 0;
465f4eda 2384 }
35e1a5d9
MP		 2385
2386 type = ((buffer[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */
2387
1e029397
MP		 2388 if (type > T10_PI_TYPE3_PROTECTION) {
2389 sd_printk(KERN_ERR, sdkp, "formatted with unsupported" \
2390 " protection type %u. Disabling disk!\n",
2391 type);
2392 sdkp->protection_type = 0;
2393 return -ENODEV;
2394 }
e0597d70 2395
be922f47
MP		 2396 sdkp->protection_type = type;
2397
1e029397
MP		 2398 return 0;
2399}
2400
2401static void sd_config_protection(struct scsi_disk *sdkp)
2402{
2403 struct scsi_device *sdp = sdkp->device;
2404
1e029397
MP		 2405 sd_dif_config_host(sdkp);
2406
2407 if (!sdkp->protection_type)
2408 return;
2409
2410 if (!scsi_host_dif_capable(sdp->host, sdkp->protection_type)) {
26a02d97
XY		 2411 sd_first_printk(KERN_NOTICE, sdkp,
2412 "Disabling DIF Type %u protection\n",
2413 sdkp->protection_type);
1e029397
MP		 2414 sdkp->protection_type = 0;
2415 }
2416
26a02d97
XY		 2417 sd_first_printk(KERN_NOTICE, sdkp, "Enabling DIF Type %u protection\n",
2418 sdkp->protection_type);
e0597d70
MP		 2419}
2420
0da205e0
MW		 2421static void read_capacity_error(struct scsi_disk *sdkp, struct scsi_device *sdp,
2422 struct scsi_sense_hdr *sshdr, int sense_valid,
2423 int the_result)
2424{
464a00c9 2425 if (sense_valid)
0da205e0
MW		 2426 sd_print_sense_hdr(sdkp, sshdr);
2427 else
2428 sd_printk(KERN_NOTICE, sdkp, "Sense not available.\n");
2429
2430 /*
2431 * Set dirty bit for removable devices if not ready -
2432 * sometimes drives will not report this properly.
2433 */
2434 if (sdp->removable &&
2435 sense_valid && sshdr->sense_key == NOT_READY)
2bae0093 2436 set_media_not_present(sdkp);
0da205e0
MW		 2437
2438 /*
2439 * We used to set media_present to 0 here to indicate no media
2440 * in the drive, but some drives fail read capacity even with
2441 * media present, so we can't do that.
2442 */
2443 sdkp->capacity = 0; /* unknown mapped to zero - as usual */
2444}
2445
2446#define RC16_LEN 32
2447#if RC16_LEN > SD_BUF_SIZE
2448#error RC16_LEN must not be more than SD_BUF_SIZE
2449#endif
2450
3233ac19
JB		 2451#define READ_CAPACITY_RETRIES_ON_RESET 10
2452
0da205e0
MW		 2453static int read_capacity_16(struct scsi_disk *sdkp, struct scsi_device *sdp,
2454 unsigned char *buffer)
ea73a9f2 2455{
1da177e4 2456 unsigned char cmd[16];
1da177e4 2457 struct scsi_sense_hdr sshdr;
af16cd63
MC		 2458 const struct scsi_exec_args exec_args = {
2459 .sshdr = &sshdr,
2460 };
1da177e4 2461 int sense_valid = 0;
0da205e0 2462 int the_result;
3233ac19 2463 int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET;
ea09bcc9 2464 unsigned int alignment;
0da205e0
MW		 2465 unsigned long long lba;
2466 unsigned sector_size;
1da177e4 2467
5ce524bd
HG		 2468 if (sdp->no_read_capacity_16)
2469 return -EINVAL;
2470
1da177e4 2471 do {
0da205e0 2472 memset(cmd, 0, 16);
eb846d9f 2473 cmd[0] = SERVICE_ACTION_IN_16;
0da205e0
MW		 2474 cmd[1] = SAI_READ_CAPACITY_16;
2475 cmd[13] = RC16_LEN;
2476 memset(buffer, 0, RC16_LEN);
2477
af16cd63
MC		 2478 the_result = scsi_execute_cmd(sdp, cmd, REQ_OP_DRV_IN,
2479 buffer, RC16_LEN, SD_TIMEOUT,
2480 sdkp->max_retries, &exec_args);
ced202f7 2481 if (the_result > 0) {
bd593bd2
MC		 2482 if (media_not_present(sdkp, &sshdr))
2483 return -ENODEV;
2484
ea73a9f2 2485 sense_valid = scsi_sense_valid(&sshdr);
2b301307
MW		 2486 if (sense_valid &&
2487 sshdr.sense_key == ILLEGAL_REQUEST &&
2488 (sshdr.asc == 0x20 || sshdr.asc == 0x24) &&
2489 sshdr.ascq == 0x00)
2490 /* Invalid Command Operation Code or
2491 * Invalid Field in CDB, just retry
2492 * silently with RC10 */
2493 return -EINVAL;
3233ac19
JB		 2494 if (sense_valid &&
2495 sshdr.sense_key == UNIT_ATTENTION &&
2496 sshdr.asc == 0x29 && sshdr.ascq == 0x00)
2497 /* Device reset might occur several times,
2498 * give it one more chance */
2499 if (--reset_retries > 0)
2500 continue;
2b301307 2501 }
1da177e4
LT		 2502 retries--;
2503
2504 } while (the_result && retries);
2505
0da205e0 2506 if (the_result) {
ef61329d 2507 sd_print_result(sdkp, "Read Capacity(16) failed", the_result);
0da205e0
MW		 2508 read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result);
2509 return -EINVAL;
2510 }
e73aec82 2511
8f76d151
DH		 2512 sector_size = get_unaligned_be32(&buffer[8]);
2513 lba = get_unaligned_be64(&buffer[0]);
0da205e0 2514
fe542396
MP		 2515 if (sd_read_protection_type(sdkp, buffer) < 0) {
2516 sdkp->capacity = 0;
2517 return -ENODEV;
2518 }
0da205e0 2519
ea09bcc9 2520 /* Logical blocks per physical block exponent */
526f7c79 2521 sdkp->physical_block_size = (1 << (buffer[13] & 0xf)) * sector_size;
ea09bcc9 2522
89d94756
HR		 2523 /* RC basis */
2524 sdkp->rc_basis = (buffer[12] >> 4) & 0x3;
2525
ea09bcc9
MP		 2526 /* Lowest aligned logical block */
2527 alignment = ((buffer[14] & 0x3f) << 8 | buffer[15]) * sector_size;
2528 blk_queue_alignment_offset(sdp->request_queue, alignment);
2529 if (alignment && sdkp->first_scan)
2530 sd_printk(KERN_NOTICE, sdkp,
2531 "physical block alignment offset: %u\n", alignment);
2532
c98a0eb0
MP		 2533 if (buffer[14] & 0x80) { /* LBPME */
2534 sdkp->lbpme = 1;
e339c1a7 2535
c98a0eb0
MP		 2536 if (buffer[14] & 0x40) /* LBPRZ */
2537 sdkp->lbprz = 1;
e339c1a7 2538
c98a0eb0 2539 sd_config_discard(sdkp, SD_LBP_WS16);
e339c1a7
MP		 2540 }
2541
0da205e0
MW		 2542 sdkp->capacity = lba + 1;
2543 return sector_size;
2544}
2545
2546static int read_capacity_10(struct scsi_disk *sdkp, struct scsi_device *sdp,
2547 unsigned char *buffer)
2548{
2549 unsigned char cmd[16];
2550 struct scsi_sense_hdr sshdr;
af16cd63
MC		 2551 const struct scsi_exec_args exec_args = {
2552 .sshdr = &sshdr,
2553 };
0da205e0
MW		 2554 int sense_valid = 0;
2555 int the_result;
3233ac19 2556 int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET;
0da205e0
MW		 2557 sector_t lba;
2558 unsigned sector_size;
2559
2560 do {
2561 cmd[0] = READ_CAPACITY;
2562 memset(&cmd[1], 0, 9);
2563 memset(buffer, 0, 8);
2564
af16cd63
MC		 2565 the_result = scsi_execute_cmd(sdp, cmd, REQ_OP_DRV_IN, buffer,
2566 8, SD_TIMEOUT, sdkp->max_retries,
2567 &exec_args);
0da205e0
MW		 2568
2569 if (media_not_present(sdkp, &sshdr))
2570 return -ENODEV;
2571
ced202f7 2572 if (the_result > 0) {
0da205e0 2573 sense_valid = scsi_sense_valid(&sshdr);
3233ac19
JB		 2574 if (sense_valid &&
2575 sshdr.sense_key == UNIT_ATTENTION &&
2576 sshdr.asc == 0x29 && sshdr.ascq == 0x00)
2577 /* Device reset might occur several times,
2578 * give it one more chance */
2579 if (--reset_retries > 0)
2580 continue;
2581 }
0da205e0
MW		 2582 retries--;
2583
2584 } while (the_result && retries);
2585
2586 if (the_result) {
ef61329d 2587 sd_print_result(sdkp, "Read Capacity(10) failed", the_result);
0da205e0
MW		 2588 read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result);
2589 return -EINVAL;
2590 }
2591
8f76d151
DH		 2592 sector_size = get_unaligned_be32(&buffer[4]);
2593 lba = get_unaligned_be32(&buffer[0]);
0da205e0 2594
5ce524bd
HG		 2595 if (sdp->no_read_capacity_16 && (lba == 0xffffffff)) {
2596 /* Some buggy (usb cardreader) devices return an lba of
2597 0xffffffff when the want to report a size of 0 (with
2598 which they really mean no media is present) */
2599 sdkp->capacity = 0;
5cc10350 2600 sdkp->physical_block_size = sector_size;
5ce524bd
HG		 2601 return sector_size;
2602 }
2603
0da205e0 2604 sdkp->capacity = lba + 1;
526f7c79 2605 sdkp->physical_block_size = sector_size;
0da205e0
MW		 2606 return sector_size;
2607}
2608
2b301307
MW		 2609static int sd_try_rc16_first(struct scsi_device *sdp)
2610{
f87146bb
HR		 2611 if (sdp->host->max_cmd_len < 16)
2612 return 0;
6a0bdffa
AS		 2613 if (sdp->try_rc_10_first)
2614 return 0;
2b301307
MW		 2615 if (sdp->scsi_level > SCSI_SPC_2)
2616 return 1;
2617 if (scsi_device_protection(sdp))
2618 return 1;
2619 return 0;
2620}
2621
0da205e0
MW		 2622/*
2623 * read disk capacity
2624 */
2625static void
2626sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer)
2627{
2628 int sector_size;
2629 struct scsi_device *sdp = sdkp->device;
2630
2b301307 2631 if (sd_try_rc16_first(sdp)) {
0da205e0
MW		 2632 sector_size = read_capacity_16(sdkp, sdp, buffer);
2633 if (sector_size == -EOVERFLOW)
1da177e4 2634 goto got_data;
2b301307
MW		 2635 if (sector_size == -ENODEV)
2636 return;
2637 if (sector_size < 0)
2638 sector_size = read_capacity_10(sdkp, sdp, buffer);
0da205e0
MW		 2639 if (sector_size < 0)
2640 return;
1da177e4 2641 } else {
0da205e0
MW		 2642 sector_size = read_capacity_10(sdkp, sdp, buffer);
2643 if (sector_size == -EOVERFLOW)
2644 goto got_data;
2645 if (sector_size < 0)
2646 return;
2647 if ((sizeof(sdkp->capacity) > 4) &&
2648 (sdkp->capacity > 0xffffffffULL)) {
2649 int old_sector_size = sector_size;
2650 sd_printk(KERN_NOTICE, sdkp, "Very big device. "
2651 "Trying to use READ CAPACITY(16).\n");
2652 sector_size = read_capacity_16(sdkp, sdp, buffer);
2653 if (sector_size < 0) {
2654 sd_printk(KERN_NOTICE, sdkp,
2655 "Using 0xffffffff as device size\n");
2656 sdkp->capacity = 1 + (sector_t) 0xffffffff;
2657 sector_size = old_sector_size;
2658 goto got_data;
2659 }
597d7400
MP		 2660 /* Remember that READ CAPACITY(16) succeeded */
2661 sdp->try_rc_10_first = 0;
0da205e0
MW		 2662 }
2663 }
1da177e4 2664
5c211caa
AS		 2665 /* Some devices are known to return the total number of blocks,
2666 * not the highest block number. Some devices have versions
2667 * which do this and others which do not. Some devices we might
2668 * suspect of doing this but we don't know for certain.
2669 *
2670 * If we know the reported capacity is wrong, decrement it. If
2671 * we can only guess, then assume the number of blocks is even
2672 * (usually true but not always) and err on the side of lowering
2673 * the capacity.
2674 */
2675 if (sdp->fix_capacity ||
2676 (sdp->guess_capacity && (sdkp->capacity & 0x01))) {
2677 sd_printk(KERN_INFO, sdkp, "Adjusting the sector count "
2678 "from its reported value: %llu\n",
2679 (unsigned long long) sdkp->capacity);
1da177e4 2680 --sdkp->capacity;
61bf54b7
ON		 2681 }
2682
1da177e4
LT		 2683got_data:
2684 if (sector_size == 0) {
2685 sector_size = 512;
e73aec82
MP		 2686 sd_printk(KERN_NOTICE, sdkp, "Sector size 0 reported, "
2687 "assuming 512.\n");
1da177e4
LT		 2688 }
2689
2690 if (sector_size != 512 &&
2691 sector_size != 1024 &&
2692 sector_size != 2048 &&
74856fbf 2693 sector_size != 4096) {
e73aec82
MP		 2694 sd_printk(KERN_NOTICE, sdkp, "Unsupported sector size %d.\n",
2695 sector_size);
1da177e4
LT		 2696 /*
2697 * The user might want to re-format the drive with
2698 * a supported sectorsize. Once this happens, it
2699 * would be relatively trivial to set the thing up.
2700 * For this reason, we leave the thing in the table.
2701 */
2702 sdkp->capacity = 0;
2703 /*
2704 * set a bogus sector size so the normal read/write
2705 * logic in the block layer will eventually refuse any
2706 * request on this device without tripping over power
2707 * of two sector size assumptions
2708 */
2709 sector_size = 512;
2710 }
e1defc4f 2711 blk_queue_logical_block_size(sdp->request_queue, sector_size);
89d94756
HR		 2712 blk_queue_physical_block_size(sdp->request_queue,
2713 sdkp->physical_block_size);
2714 sdkp->device->sector_size = sector_size;
7404ad3b 2715
89d94756
HR		 2716 if (sdkp->capacity > 0xffffffff)
2717 sdp->use_16_for_rw = 1;
1da177e4 2718
89d94756 2719}
1da177e4 2720
89d94756
HR		 2721/*
2722 * Print disk capacity
2723 */
2724static void
2725sd_print_capacity(struct scsi_disk *sdkp,
2726 sector_t old_capacity)
2727{
2728 int sector_size = sdkp->device->sector_size;
2729 char cap_str_2[10], cap_str_10[10];
ea09bcc9 2730
d7e6db20
DLM		 2731 if (!sdkp->first_scan && old_capacity == sdkp->capacity)
2732 return;
2733
89d94756
HR		 2734 string_get_size(sdkp->capacity, sector_size,
2735 STRING_UNITS_2, cap_str_2, sizeof(cap_str_2));
2736 string_get_size(sdkp->capacity, sector_size,
d7e6db20 2737 STRING_UNITS_10, cap_str_10, sizeof(cap_str_10));
1da177e4 2738
d7e6db20
DLM		 2739 sd_printk(KERN_NOTICE, sdkp,
2740 "%llu %d-byte logical blocks: (%s/%s)\n",
2741 (unsigned long long)sdkp->capacity,
2742 sector_size, cap_str_10, cap_str_2);
53ad570b 2743
d7e6db20
DLM		 2744 if (sdkp->physical_block_size != sector_size)
2745 sd_printk(KERN_NOTICE, sdkp,
2746 "%u-byte physical blocks\n",
2747 sdkp->physical_block_size);
1da177e4
LT		 2748}
2749
2750/* called with buffer of length 512 */
2751static inline int
0610959f 2752sd_do_mode_sense(struct scsi_disk *sdkp, int dbd, int modepage,
ea73a9f2
JB		 2753 unsigned char *buffer, int len, struct scsi_mode_data *data,
2754 struct scsi_sense_hdr *sshdr)
1da177e4 2755{
c749301e
DLM		 2756 /*
2757 * If we must use MODE SENSE(10), make sure that the buffer length
2758 * is at least 8 bytes so that the mode sense header fits.
2759 */
2760 if (sdkp->device->use_10_for_ms && len < 8)
2761 len = 8;
2762
a6cdc35f
DLM		 2763 return scsi_mode_sense(sdkp->device, dbd, modepage, 0, buffer, len,
2764 SD_TIMEOUT, sdkp->max_retries, data, sshdr);
1da177e4
LT		 2765}
2766
2767/*
2768 * read write protect setting, if possible - called only in sd_revalidate_disk()
48970800 2769 * called with buffer of length SD_BUF_SIZE
1da177e4
LT		 2770 */
2771static void
e73aec82 2772sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer)
ea73a9f2 2773{
1da177e4 2774 int res;
ea73a9f2 2775 struct scsi_device *sdp = sdkp->device;
1da177e4 2776 struct scsi_mode_data data;
70a9b873 2777 int old_wp = sdkp->write_prot;
1da177e4
LT		 2778
2779 set_disk_ro(sdkp->disk, 0);
ea73a9f2 2780 if (sdp->skip_ms_page_3f) {
b2bff6ce 2781 sd_first_printk(KERN_NOTICE, sdkp, "Assuming Write Enabled\n");
1da177e4
LT		 2782 return;
2783 }
2784
ea73a9f2 2785 if (sdp->use_192_bytes_for_3f) {
0610959f 2786 res = sd_do_mode_sense(sdkp, 0, 0x3F, buffer, 192, &data, NULL);
1da177e4
LT		 2787 } else {
2788 /*
2789 * First attempt: ask for all pages (0x3F), but only 4 bytes.
2790 * We have to start carefully: some devices hang if we ask
2791 * for more than is available.
2792 */
0610959f 2793 res = sd_do_mode_sense(sdkp, 0, 0x3F, buffer, 4, &data, NULL);
1da177e4
LT		 2794
2795 /*
2796 * Second attempt: ask for page 0 When only page 0 is
2797 * implemented, a request for page 3F may return Sense Key
2798 * 5: Illegal Request, Sense Code 24: Invalid field in
2799 * CDB.
2800 */
8793613d 2801 if (res < 0)
0610959f 2802 res = sd_do_mode_sense(sdkp, 0, 0, buffer, 4, &data, NULL);
1da177e4
LT		 2803
2804 /*
2805 * Third attempt: ask 255 bytes, as we did earlier.
2806 */
8793613d 2807 if (res < 0)
0610959f 2808 res = sd_do_mode_sense(sdkp, 0, 0x3F, buffer, 255,
ea73a9f2 2809 &data, NULL);
1da177e4
LT		 2810 }
2811
8793613d 2812 if (res < 0) {
b2bff6ce 2813 sd_first_printk(KERN_WARNING, sdkp,
e73aec82 2814 "Test WP failed, assume Write Enabled\n");
1da177e4
LT		 2815 } else {
2816 sdkp->write_prot = ((data.device_specific & 0x80) != 0);
8acf608e 2817 set_disk_ro(sdkp->disk, sdkp->write_prot);
70a9b873
MP		 2818 if (sdkp->first_scan || old_wp != sdkp->write_prot) {
2819 sd_printk(KERN_NOTICE, sdkp, "Write Protect is %s\n",
2820 sdkp->write_prot ? "on" : "off");
df441cc0 2821 sd_printk(KERN_DEBUG, sdkp, "Mode Sense: %4ph\n", buffer);
70a9b873 2822 }
1da177e4
LT		 2823 }
2824}
2825
2826/*
2827 * sd_read_cache_type - called only from sd_revalidate_disk()
48970800 2828 * called with buffer of length SD_BUF_SIZE
1da177e4
LT		 2829 */
2830static void
e73aec82 2831sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer)
631e8a13 2832{
1da177e4 2833 int len = 0, res;
ea73a9f2 2834 struct scsi_device *sdp = sdkp->device;
1da177e4 2835
631e8a13
AV		 2836 int dbd;
2837 int modepage;
0bcaa111 2838 int first_len;
1da177e4
LT		 2839 struct scsi_mode_data data;
2840 struct scsi_sense_hdr sshdr;
70a9b873
MP		 2841 int old_wce = sdkp->WCE;
2842 int old_rcd = sdkp->RCD;
2843 int old_dpofua = sdkp->DPOFUA;
1da177e4 2844
39c60a09
JB		 2845
2846 if (sdkp->cache_override)
2847 return;
2848
0bcaa111
LT		 2849 first_len = 4;
2850 if (sdp->skip_ms_page_8) {
2851 if (sdp->type == TYPE_RBC)
2852 goto defaults;
2853 else {
2854 if (sdp->skip_ms_page_3f)
2855 goto defaults;
2856 modepage = 0x3F;
2857 if (sdp->use_192_bytes_for_3f)
2858 first_len = 192;
2859 dbd = 0;
2860 }
2861 } else if (sdp->type == TYPE_RBC) {
631e8a13
AV		 2862 modepage = 6;
2863 dbd = 8;
2864 } else {
2865 modepage = 8;
2866 dbd = 0;
2867 }
2868
1da177e4 2869 /* cautiously ask */
0610959f 2870 res = sd_do_mode_sense(sdkp, dbd, modepage, buffer, first_len,
0bcaa111 2871 &data, &sshdr);
1da177e4 2872
8793613d 2873 if (res < 0)
1da177e4
LT		 2874 goto bad_sense;
2875
6d73c851
AV		 2876 if (!data.header_length) {
2877 modepage = 6;
0bcaa111 2878 first_len = 0;
b2bff6ce
MP		 2879 sd_first_printk(KERN_ERR, sdkp,
2880 "Missing header in MODE_SENSE response\n");
6d73c851
AV		 2881 }
2882
1da177e4
LT		 2883 /* that went OK, now ask for the proper length */
2884 len = data.length;
2885
2886 /*
2887 * We're only interested in the first three bytes, actually.
2888 * But the data cache page is defined for the first 20.
2889 */
2890 if (len < 3)
2891 goto bad_sense;
0bcaa111 2892 else if (len > SD_BUF_SIZE) {
b2bff6ce 2893 sd_first_printk(KERN_NOTICE, sdkp, "Truncating mode parameter "
0bcaa111
LT		 2894 "data from %d to %d bytes\n", len, SD_BUF_SIZE);
2895 len = SD_BUF_SIZE;
2896 }
2897 if (modepage == 0x3F && sdp->use_192_bytes_for_3f)
2898 len = 192;
1da177e4
LT		 2899
2900 /* Get the data */
0bcaa111 2901 if (len > first_len)
0610959f 2902 res = sd_do_mode_sense(sdkp, dbd, modepage, buffer, len,
0bcaa111 2903 &data, &sshdr);
1da177e4 2904
8793613d 2905 if (!res) {
631e8a13 2906 int offset = data.header_length + data.block_descriptor_length;
1da177e4 2907
0bcaa111
LT		 2908 while (offset < len) {
2909 u8 page_code = buffer[offset] & 0x3F;
2910 u8 spf = buffer[offset] & 0x40;
2911
2912 if (page_code == 8 || page_code == 6) {
2913 /* We're interested only in the first 3 bytes.
2914 */
2915 if (len - offset <= 2) {
b2bff6ce
MP		 2916 sd_first_printk(KERN_ERR, sdkp,
2917 "Incomplete mode parameter "
2918 "data\n");
0bcaa111
LT		 2919 goto defaults;
2920 } else {
2921 modepage = page_code;
2922 goto Page_found;
2923 }
2924 } else {
2925 /* Go to the next page */
2926 if (spf && len - offset > 3)
2927 offset += 4 + (buffer[offset+2] << 8) +
2928 buffer[offset+3];
2929 else if (!spf && len - offset > 1)
2930 offset += 2 + buffer[offset+1];
2931 else {
b2bff6ce
MP		 2932 sd_first_printk(KERN_ERR, sdkp,
2933 "Incomplete mode "
2934 "parameter data\n");
0bcaa111
LT		 2935 goto defaults;
2936 }
2937 }
48970800
AV		 2938 }
2939
c4da1205
MK		 2940 sd_first_printk(KERN_WARNING, sdkp,
2941 "No Caching mode page found\n");
984f1733
AS		 2942 goto defaults;
2943
0bcaa111 2944 Page_found:
631e8a13
AV		 2945 if (modepage == 8) {
2946 sdkp->WCE = ((buffer[offset + 2] & 0x04) != 0);
2947 sdkp->RCD = ((buffer[offset + 2] & 0x01) != 0);
2948 } else {
2949 sdkp->WCE = ((buffer[offset + 2] & 0x01) == 0);
2950 sdkp->RCD = 0;
2951 }
1da177e4 2952
007365ad 2953 sdkp->DPOFUA = (data.device_specific & 0x10) != 0;
b14bf2d0
AS		 2954 if (sdp->broken_fua) {
2955 sd_first_printk(KERN_NOTICE, sdkp, "Disabling FUA\n");
2956 sdkp->DPOFUA = 0;
26f28197
DLM		 2957 } else if (sdkp->DPOFUA && !sdkp->device->use_10_for_rw &&
2958 !sdkp->device->use_16_for_rw) {
b2bff6ce 2959 sd_first_printk(KERN_NOTICE, sdkp,
e73aec82 2960 "Uses READ/WRITE(6), disabling FUA\n");
007365ad
TH		 2961 sdkp->DPOFUA = 0;
2962 }
2963
2eefd57b
SRT		 2964 /* No cache flush allowed for write protected devices */
2965 if (sdkp->WCE && sdkp->write_prot)
2966 sdkp->WCE = 0;
2967
70a9b873
MP		 2968 if (sdkp->first_scan || old_wce != sdkp->WCE ||
2969 old_rcd != sdkp->RCD || old_dpofua != sdkp->DPOFUA)
2970 sd_printk(KERN_NOTICE, sdkp,
2971 "Write cache: %s, read cache: %s, %s\n",
2972 sdkp->WCE ? "enabled" : "disabled",
2973 sdkp->RCD ? "disabled" : "enabled",
2974 sdkp->DPOFUA ? "supports DPO and FUA"
2975 : "doesn't support DPO or FUA");
1da177e4
LT		 2976
2977 return;
2978 }
2979
2980bad_sense:
add2c24d 2981 if (res == -EIO && scsi_sense_valid(&sshdr) &&
1da177e4
LT		 2982 sshdr.sense_key == ILLEGAL_REQUEST &&
2983 sshdr.asc == 0x24 && sshdr.ascq == 0x0)
e73aec82 2984 /* Invalid field in CDB */
b2bff6ce 2985 sd_first_printk(KERN_NOTICE, sdkp, "Cache data unavailable\n");
1da177e4 2986 else
b2bff6ce
MP		 2987 sd_first_printk(KERN_ERR, sdkp,
2988 "Asking for cache data failed\n");
1da177e4
LT		 2989
2990defaults:
b81478d8 2991 if (sdp->wce_default_on) {
b2bff6ce
MP		 2992 sd_first_printk(KERN_NOTICE, sdkp,
2993 "Assuming drive cache: write back\n");
b81478d8
NJ		 2994 sdkp->WCE = 1;
2995 } else {
c4da1205 2996 sd_first_printk(KERN_WARNING, sdkp,
b2bff6ce 2997 "Assuming drive cache: write through\n");
b81478d8
NJ		 2998 sdkp->WCE = 0;
2999 }
1da177e4 3000 sdkp->RCD = 0;
48970800 3001 sdkp->DPOFUA = 0;
1da177e4
LT		 3002}
3003
e0597d70
MP		 3004/*
3005 * The ATO bit indicates whether the DIF application tag is available
3006 * for use by the operating system.
3007 */
439d77f7 3008static void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer)
e0597d70
MP		 3009{
3010 int res, offset;
3011 struct scsi_device *sdp = sdkp->device;
3012 struct scsi_mode_data data;
3013 struct scsi_sense_hdr sshdr;
3014
89d94756 3015 if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC)
e0597d70
MP		 3016 return;
3017
3018 if (sdkp->protection_type == 0)
3019 return;
3020
a6cdc35f 3021 res = scsi_mode_sense(sdp, 1, 0x0a, 0, buffer, 36, SD_TIMEOUT,
0610959f 3022 sdkp->max_retries, &data, &sshdr);
e0597d70 3023
8793613d 3024 if (res < 0 || !data.header_length ||
e0597d70 3025 data.length < 6) {
b2bff6ce 3026 sd_first_printk(KERN_WARNING, sdkp,
e0597d70
MP		 3027 "getting Control mode page failed, assume no ATO\n");
3028
add2c24d 3029 if (res == -EIO && scsi_sense_valid(&sshdr))
e0597d70
MP		 3030 sd_print_sense_hdr(sdkp, &sshdr);
3031
3032 return;
3033 }
3034
3035 offset = data.header_length + data.block_descriptor_length;
3036
3037 if ((buffer[offset] & 0x3f) != 0x0a) {
b2bff6ce 3038 sd_first_printk(KERN_ERR, sdkp, "ATO Got wrong page\n");
e0597d70
MP		 3039 return;
3040 }
3041
3042 if ((buffer[offset + 5] & 0x80) == 0)
3043 return;
3044
3045 sdkp->ATO = 1;
3046
3047 return;
3048}
3049
d11b6916
MP		 3050/**
3051 * sd_read_block_limits - Query disk device for preferred I/O sizes.
7529fbb0 3052 * @sdkp: disk to query
d11b6916
MP		 3053 */
3054static void sd_read_block_limits(struct scsi_disk *sdkp)
3055{
7fb019c4 3056 struct scsi_vpd *vpd;
d11b6916 3057
7fb019c4 3058 rcu_read_lock();
d11b6916 3059
7fb019c4
MP		 3060 vpd = rcu_dereference(sdkp->device->vpd_pgb0);
3061 if (!vpd || vpd->len < 16)
e3deec09 3062 goto out;
ca369d51 3063
631669a2 3064 sdkp->min_xfer_blocks = get_unaligned_be16(&vpd->data[6]);
7fb019c4
MP		 3065 sdkp->max_xfer_blocks = get_unaligned_be32(&vpd->data[8]);
3066 sdkp->opt_xfer_blocks = get_unaligned_be32(&vpd->data[12]);
d11b6916 3067
7fb019c4 3068 if (vpd->len >= 64) {
c98a0eb0 3069 unsigned int lba_count, desc_count;
e339c1a7 3070
7fb019c4 3071 sdkp->max_ws_blocks = (u32)get_unaligned_be64(&vpd->data[36]);
e339c1a7 3072
c98a0eb0 3073 if (!sdkp->lbpme)
045d3fe7 3074 goto out;
045d3fe7 3075
7fb019c4
MP		 3076 lba_count = get_unaligned_be32(&vpd->data[20]);
3077 desc_count = get_unaligned_be32(&vpd->data[24]);
045d3fe7 3078
c98a0eb0
MP		 3079 if (lba_count && desc_count)
3080 sdkp->max_unmap_blocks = lba_count;
e339c1a7 3081
7fb019c4 3082 sdkp->unmap_granularity = get_unaligned_be32(&vpd->data[28]);
e339c1a7 3083
7fb019c4 3084 if (vpd->data[32] & 0x80)
c98a0eb0 3085 sdkp->unmap_alignment =
7fb019c4 3086 get_unaligned_be32(&vpd->data[32]) & ~(1 << 31);
c98a0eb0
MP		 3087
3088 if (!sdkp->lbpvpd) { /* LBP VPD page not provided */
3089
3090 if (sdkp->max_unmap_blocks)
3091 sd_config_discard(sdkp, SD_LBP_UNMAP);
3092 else
3093 sd_config_discard(sdkp, SD_LBP_WS16);
3094
3095 } else { /* LBP VPD page tells us what to use */
bcd069bb 3096 if (sdkp->lbpu && sdkp->max_unmap_blocks)
e461338b
MP		 3097 sd_config_discard(sdkp, SD_LBP_UNMAP);
3098 else if (sdkp->lbpws)
c98a0eb0
MP		 3099 sd_config_discard(sdkp, SD_LBP_WS16);
3100 else if (sdkp->lbpws10)
3101 sd_config_discard(sdkp, SD_LBP_WS10);
3102 else
3103 sd_config_discard(sdkp, SD_LBP_DISABLE);
3104 }
e339c1a7
MP		 3105 }
3106
e3deec09 3107 out:
7fb019c4 3108 rcu_read_unlock();
d11b6916
MP		 3109}
3110
3821d768
MP		 3111/**
3112 * sd_read_block_characteristics - Query block dev. characteristics
7529fbb0 3113 * @sdkp: disk to query
3821d768
MP		 3114 */
3115static void sd_read_block_characteristics(struct scsi_disk *sdkp)
3116{
89d94756 3117 struct request_queue *q = sdkp->disk->queue;
7fb019c4 3118 struct scsi_vpd *vpd;
3821d768
MP		 3119 u16 rot;
3120
7fb019c4
MP		 3121 rcu_read_lock();
3122 vpd = rcu_dereference(sdkp->device->vpd_pgb1);
3821d768 3123
7fb019c4
MP		 3124 if (!vpd || vpd->len < 8) {
3125 rcu_read_unlock();
3126 return;
3127 }
3821d768 3128
7fb019c4 3129 rot = get_unaligned_be16(&vpd->data[4]);
7437bb73 3130 sdkp->zoned = (vpd->data[8] >> 4) & 3;
7fb019c4 3131 rcu_read_unlock();
3821d768 3132
b277da0a 3133 if (rot == 1) {
8b904b5b
BVA		 3134 blk_queue_flag_set(QUEUE_FLAG_NONROT, q);
3135 blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, q);
b277da0a 3136 }
3821d768 3137
d73e93b4
CH		 3138
3139#ifdef CONFIG_BLK_DEV_ZONED /* sd_probe rejects ZBD devices early otherwise */
68af412c 3140 if (sdkp->device->type == TYPE_ZBC) {
288b3271 3141 /*
7437bb73
CH		 3142 * Host-managed.
3143 */
d73e93b4 3144 disk_set_zoned(sdkp->disk);
7437bb73
CH		 3145
3146 /*
3147 * Per ZBC and ZAC specifications, writes in sequential write
3148 * required zones of host-managed devices must be aligned to
3149 * the device physical block size.
288b3271 3150 */
288b3271 3151 blk_queue_zone_write_granularity(q, sdkp->physical_block_size);
68af412c 3152 } else {
7437bb73 3153 /*
6945a180 3154 * Host-aware devices are treated as conventional.
7437bb73 3155 */
6945a180 3156 WARN_ON_ONCE(blk_queue_is_zoned(q));
68af412c 3157 }
d73e93b4 3158#endif /* CONFIG_BLK_DEV_ZONED */
27ba3e8f
DLM		 3159
3160 if (!sdkp->first_scan)
7fb019c4 3161 return;
27ba3e8f 3162
7437bb73
CH		 3163 if (blk_queue_is_zoned(q))
3164 sd_printk(KERN_NOTICE, sdkp, "Host-managed zoned block device\n");
3165 else if (sdkp->zoned == 1)
3166 sd_printk(KERN_NOTICE, sdkp, "Host-aware SMR disk used as regular disk\n");
3167 else if (sdkp->zoned == 2)
3168 sd_printk(KERN_NOTICE, sdkp, "Drive-managed SMR disk\n");
3821d768
MP		 3169}
3170
045d3fe7 3171/**
c98a0eb0 3172 * sd_read_block_provisioning - Query provisioning VPD page
7529fbb0 3173 * @sdkp: disk to query
045d3fe7 3174 */
c98a0eb0 3175static void sd_read_block_provisioning(struct scsi_disk *sdkp)
045d3fe7 3176{
7fb019c4 3177 struct scsi_vpd *vpd;
045d3fe7 3178
c98a0eb0 3179 if (sdkp->lbpme == 0)
045d3fe7
MP		 3180 return;
3181
7fb019c4
MP		 3182 rcu_read_lock();
3183 vpd = rcu_dereference(sdkp->device->vpd_pgb2);
045d3fe7 3184
7fb019c4
MP		 3185 if (!vpd || vpd->len < 8) {
3186 rcu_read_unlock();
3187 return;
3188 }
045d3fe7 3189
c98a0eb0 3190 sdkp->lbpvpd = 1;
7fb019c4
MP		 3191 sdkp->lbpu = (vpd->data[5] >> 7) & 1; /* UNMAP */
3192 sdkp->lbpws = (vpd->data[5] >> 6) & 1; /* WRITE SAME(16) w/ UNMAP */
3193 sdkp->lbpws10 = (vpd->data[5] >> 5) & 1; /* WRITE SAME(10) w/ UNMAP */
3194 rcu_read_unlock();
045d3fe7
MP		 3195}
3196
5db44863
MP		 3197static void sd_read_write_same(struct scsi_disk *sdkp, unsigned char *buffer)
3198{
66c28f97
MP		 3199 struct scsi_device *sdev = sdkp->device;
3200
54b2b50c
MP		 3201 if (sdev->host->no_write_same) {
3202 sdev->no_write_same = 1;
3203
3204 return;
3205 }
3206
152e52fb 3207 if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, INQUIRY, 0) < 0) {
e38d9e83 3208 struct scsi_vpd *vpd;
af73623f 3209
66c28f97
MP		 3210 sdev->no_report_opcodes = 1;
3211
3212 /* Disable WRITE SAME if REPORT SUPPORTED OPERATION
3213 * CODES is unsupported and the device has an ATA
3214 * Information VPD page (SAT).
3215 */
e38d9e83
MP		 3216 rcu_read_lock();
3217 vpd = rcu_dereference(sdev->vpd_pg89);
3218 if (vpd)
66c28f97 3219 sdev->no_write_same = 1;
e38d9e83 3220 rcu_read_unlock();
66c28f97
MP		 3221 }
3222
152e52fb 3223 if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME_16, 0) == 1)
5db44863 3224 sdkp->ws16 = 1;
66c28f97 3225
152e52fb 3226 if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME, 0) == 1)
66c28f97 3227 sdkp->ws10 = 1;
5db44863
MP		 3228}
3229
d80210f2
CH		 3230static void sd_read_security(struct scsi_disk *sdkp, unsigned char *buffer)
3231{
3232 struct scsi_device *sdev = sdkp->device;
3233
3234 if (!sdev->security_supported)
3235 return;
3236
3237 if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE,
152e52fb 3238 SECURITY_PROTOCOL_IN, 0) == 1 &&
d80210f2 3239 scsi_report_opcode(sdev, buffer, SD_BUF_SIZE,
152e52fb 3240 SECURITY_PROTOCOL_OUT, 0) == 1)
d80210f2
CH		 3241 sdkp->security = 1;
3242}
3243
e815d365
DLM		 3244static inline sector_t sd64_to_sectors(struct scsi_disk *sdkp, u8 *buf)
3245{
3246 return logical_to_sectors(sdkp->device, get_unaligned_be64(buf));
3247}
3248
3249/**
3250 * sd_read_cpr - Query concurrent positioning ranges
3251 * @sdkp: disk to query
3252 */
3253static void sd_read_cpr(struct scsi_disk *sdkp)
3254{
3255 struct blk_independent_access_ranges *iars = NULL;
3256 unsigned char *buffer = NULL;
3257 unsigned int nr_cpr = 0;
3258 int i, vpd_len, buf_len = SD_BUF_SIZE;
3259 u8 *desc;
3260
3261 /*
3262 * We need to have the capacity set first for the block layer to be
3263 * able to check the ranges.
3264 */
3265 if (sdkp->first_scan)
3266 return;
3267
3268 if (!sdkp->capacity)
3269 goto out;
3270
3271 /*
3272 * Concurrent Positioning Ranges VPD: there can be at most 256 ranges,
3273 * leading to a maximum page size of 64 + 256*32 bytes.
3274 */
3275 buf_len = 64 + 256*32;
3276 buffer = kmalloc(buf_len, GFP_KERNEL);
3277 if (!buffer || scsi_get_vpd_page(sdkp->device, 0xb9, buffer, buf_len))
3278 goto out;
3279
3280 /* We must have at least a 64B header and one 32B range descriptor */
f92de9d1 3281 vpd_len = get_unaligned_be16(&buffer[2]) + 4;
e815d365
DLM		 3282 if (vpd_len > buf_len || vpd_len < 64 + 32 || (vpd_len & 31)) {
3283 sd_printk(KERN_ERR, sdkp,
3284 "Invalid Concurrent Positioning Ranges VPD page\n");
3285 goto out;
3286 }
3287
3288 nr_cpr = (vpd_len - 64) / 32;
3289 if (nr_cpr == 1) {
3290 nr_cpr = 0;
3291 goto out;
3292 }
3293
3294 iars = disk_alloc_independent_access_ranges(sdkp->disk, nr_cpr);
3295 if (!iars) {
3296 nr_cpr = 0;
3297 goto out;
3298 }
3299
3300 desc = &buffer[64];
3301 for (i = 0; i < nr_cpr; i++, desc += 32) {
3302 if (desc[0] != i) {
3303 sd_printk(KERN_ERR, sdkp,
3304 "Invalid Concurrent Positioning Range number\n");
3305 nr_cpr = 0;
3306 break;
3307 }
3308
3309 iars->ia_range[i].sector = sd64_to_sectors(sdkp, desc + 8);
3310 iars->ia_range[i].nr_sectors = sd64_to_sectors(sdkp, desc + 16);
3311 }
3312
3313out:
3314 disk_set_independent_access_ranges(sdkp->disk, iars);
3315 if (nr_cpr && sdkp->nr_actuators != nr_cpr) {
3316 sd_printk(KERN_NOTICE, sdkp,
3317 "%u concurrent positioning ranges\n", nr_cpr);
3318 sdkp->nr_actuators = nr_cpr;
3319 }
3320
3321 kfree(buffer);
3322}
3323
631669a2
MP		 3324static bool sd_validate_min_xfer_size(struct scsi_disk *sdkp)
3325{
3326 struct scsi_device *sdp = sdkp->device;
3327 unsigned int min_xfer_bytes =
3328 logical_to_bytes(sdp, sdkp->min_xfer_blocks);
3329
3330 if (sdkp->min_xfer_blocks == 0)
3331 return false;
3332
3333 if (min_xfer_bytes & (sdkp->physical_block_size - 1)) {
3334 sd_first_printk(KERN_WARNING, sdkp,
3335 "Preferred minimum I/O size %u bytes not a " \
3336 "multiple of physical block size (%u bytes)\n",
3337 min_xfer_bytes, sdkp->physical_block_size);
3338 sdkp->min_xfer_blocks = 0;
3339 return false;
3340 }
3341
3342 sd_first_printk(KERN_INFO, sdkp, "Preferred minimum I/O size %u bytes\n",
3343 min_xfer_bytes);
3344 return true;
3345}
3346
a83da8a4
MP		 3347/*
3348 * Determine the device's preferred I/O size for reads and writes
3349 * unless the reported value is unreasonably small, large, not a
3350 * multiple of the physical block size, or simply garbage.
3351 */
3352static bool sd_validate_opt_xfer_size(struct scsi_disk *sdkp,
3353 unsigned int dev_max)
3354{
3355 struct scsi_device *sdp = sdkp->device;
3356 unsigned int opt_xfer_bytes =
3357 logical_to_bytes(sdp, sdkp->opt_xfer_blocks);
631669a2
MP		 3358 unsigned int min_xfer_bytes =
3359 logical_to_bytes(sdp, sdkp->min_xfer_blocks);
a83da8a4 3360
1d5de5bd
MP		 3361 if (sdkp->opt_xfer_blocks == 0)
3362 return false;
3363
a83da8a4
MP		 3364 if (sdkp->opt_xfer_blocks > dev_max) {
3365 sd_first_printk(KERN_WARNING, sdkp,
3366 "Optimal transfer size %u logical blocks " \
3367 "> dev_max (%u logical blocks)\n",
3368 sdkp->opt_xfer_blocks, dev_max);
3369 return false;
3370 }
3371
3372 if (sdkp->opt_xfer_blocks > SD_DEF_XFER_BLOCKS) {
3373 sd_first_printk(KERN_WARNING, sdkp,
3374 "Optimal transfer size %u logical blocks " \
3375 "> sd driver limit (%u logical blocks)\n",
3376 sdkp->opt_xfer_blocks, SD_DEF_XFER_BLOCKS);
3377 return false;
3378 }
3379
3380 if (opt_xfer_bytes < PAGE_SIZE) {
3381 sd_first_printk(KERN_WARNING, sdkp,
3382 "Optimal transfer size %u bytes < " \
3383 "PAGE_SIZE (%u bytes)\n",
3384 opt_xfer_bytes, (unsigned int)PAGE_SIZE);
3385 return false;
3386 }
3387
631669a2
MP		 3388 if (min_xfer_bytes && opt_xfer_bytes % min_xfer_bytes) {
3389 sd_first_printk(KERN_WARNING, sdkp,
3390 "Optimal transfer size %u bytes not a " \
3391 "multiple of preferred minimum block " \
3392 "size (%u bytes)\n",
3393 opt_xfer_bytes, min_xfer_bytes);
3394 return false;
3395 }
3396
a83da8a4
MP		 3397 if (opt_xfer_bytes & (sdkp->physical_block_size - 1)) {
3398 sd_first_printk(KERN_WARNING, sdkp,
3399 "Optimal transfer size %u bytes not a " \
3400 "multiple of physical block size (%u bytes)\n",
3401 opt_xfer_bytes, sdkp->physical_block_size);
3402 return false;
3403 }
3404
3405 sd_first_printk(KERN_INFO, sdkp, "Optimal transfer size %u bytes\n",
3406 opt_xfer_bytes);
3407 return true;
3408}
3409
1da177e4
LT		 3410/**
3411 * sd_revalidate_disk - called the first time a new disk is seen,
3412 * performs disk spin up, read_capacity, etc.
3413 * @disk: struct gendisk we care about
3414 **/
3415static int sd_revalidate_disk(struct gendisk *disk)
3416{
3417 struct scsi_disk *sdkp = scsi_disk(disk);
3418 struct scsi_device *sdp = sdkp->device;
ca369d51 3419 struct request_queue *q = sdkp->disk->queue;
89d94756 3420 sector_t old_capacity = sdkp->capacity;
1da177e4 3421 unsigned char *buffer;
ca369d51 3422 unsigned int dev_max, rw_max;
1da177e4 3423
fa0d34be
MP		 3424 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp,
3425 "sd_revalidate_disk\n"));
1da177e4
LT		 3426
3427 /*
3428 * If the device is offline, don't try and read capacity or any
3429 * of the other niceties.
3430 */
3431 if (!scsi_device_online(sdp))
3432 goto out;
3433
a6123f14 3434 buffer = kmalloc(SD_BUF_SIZE, GFP_KERNEL);
1da177e4 3435 if (!buffer) {
e73aec82
MP		 3436 sd_printk(KERN_WARNING, sdkp, "sd_revalidate_disk: Memory "
3437 "allocation failure.\n");
ea73a9f2 3438 goto out;
1da177e4
LT		 3439 }
3440
e73aec82 3441 sd_spinup_disk(sdkp);
1da177e4
LT		 3442
3443 /*
3444 * Without media there is no reason to ask; moreover, some devices
3445 * react badly if we do.
3446 */
3447 if (sdkp->media_present) {
e73aec82 3448 sd_read_capacity(sdkp, buffer);
ffd4bc2a 3449
e4a05698
JB		 3450 /*
3451 * set the default to rotational. All non-rotational devices
3452 * support the block characteristics VPD page, which will
3453 * cause this to be updated correctly and any device which
3454 * doesn't support it should be treated as rotational.
3455 */
3456 blk_queue_flag_clear(QUEUE_FLAG_NONROT, q);
3457 blk_queue_flag_set(QUEUE_FLAG_ADD_RANDOM, q);
3458
5ddfe085 3459 if (scsi_device_supports_vpd(sdp)) {
c98a0eb0 3460 sd_read_block_provisioning(sdkp);
ffd4bc2a
MP		 3461 sd_read_block_limits(sdkp);
3462 sd_read_block_characteristics(sdkp);
89d94756 3463 sd_zbc_read_zones(sdkp, buffer);
1700714b 3464 sd_read_cpr(sdkp);
ffd4bc2a
MP		 3465 }
3466
89d94756
HR		 3467 sd_print_capacity(sdkp, old_capacity);
3468
e73aec82
MP		 3469 sd_read_write_protect_flag(sdkp, buffer);
3470 sd_read_cache_type(sdkp, buffer);
e0597d70 3471 sd_read_app_tag_own(sdkp, buffer);
5db44863 3472 sd_read_write_same(sdkp, buffer);
d80210f2 3473 sd_read_security(sdkp, buffer);
1e029397 3474 sd_config_protection(sdkp);
1da177e4 3475 }
461d4e90
TH		 3476
3477 /*
3478 * We now have all cache related info, determine how we deal
4913efe4 3479 * with flush requests.
461d4e90 3480 */
cb2fb68d 3481 sd_set_flush_flag(sdkp);
461d4e90 3482
ca369d51
MP		 3483 /* Initial block count limit based on CDB TRANSFER LENGTH field size. */
3484 dev_max = sdp->use_16_for_rw ? SD_MAX_XFER_BLOCKS : SD_DEF_XFER_BLOCKS;
3485
3486 /* Some devices report a maximum block count for READ/WRITE requests. */
3487 dev_max = min_not_zero(dev_max, sdkp->max_xfer_blocks);
3488 q->limits.max_dev_sectors = logical_to_sectors(sdp, dev_max);
3489
631669a2
MP		 3490 if (sd_validate_min_xfer_size(sdkp))
3491 blk_queue_io_min(sdkp->disk->queue,
3492 logical_to_bytes(sdp, sdkp->min_xfer_blocks));
3493 else
3494 blk_queue_io_min(sdkp->disk->queue, 0);
3495
a83da8a4 3496 if (sd_validate_opt_xfer_size(sdkp, dev_max)) {
6b7e9cde
MP		 3497 q->limits.io_opt = logical_to_bytes(sdp, sdkp->opt_xfer_blocks);
3498 rw_max = logical_to_sectors(sdp, sdkp->opt_xfer_blocks);
ea697a8b
MP		 3499 } else {
3500 q->limits.io_opt = 0;
67804145 3501 rw_max = min_not_zero(logical_to_sectors(sdp, dev_max),
d6b9f4e6 3502 (sector_t)BLK_DEF_MAX_SECTORS_CAP);
ea697a8b 3503 }
3a9794d3 3504
c9337ad4
JG		 3505 /*
3506 * Limit default to SCSI host optimal sector limit if set. There may be
3507 * an impact on performance for when the size of a request exceeds this
3508 * host limit.
3509 */
608128d3
JG		 3510 rw_max = min_not_zero(rw_max, sdp->host->opt_sectors);
3511
77082ca5
MP		 3512 /* Do not exceed controller limit */
3513 rw_max = min(rw_max, queue_max_hw_sectors(q));
3514
3515 /*
3516 * Only update max_sectors if previously unset or if the current value
3517 * exceeds the capabilities of the hardware.
3518 */
3519 if (sdkp->first_scan ||
3520 q->limits.max_sectors > q->limits.max_dev_sectors ||
3521 q->limits.max_sectors > q->limits.max_hw_sectors)
3522 q->limits.max_sectors = rw_max;
3523
3524 sdkp->first_scan = 0;
4f258a46 3525
449f4ec9 3526 set_capacity_and_notify(disk, logical_to_sectors(sdp, sdkp->capacity));
5db44863 3527 sd_config_write_same(sdkp);
1da177e4
LT		 3528 kfree(buffer);
3529
a3d8a257
DLM		 3530 /*
3531 * For a zoned drive, revalidating the zones can be done only once
3532 * the gendisk capacity is set. So if this fails, set back the gendisk
3533 * capacity to 0.
3534 */
3535 if (sd_zbc_revalidate_zones(sdkp))
449f4ec9 3536 set_capacity_and_notify(disk, 0);
a3d8a257 3537
1da177e4
LT		 3538 out:
3539 return 0;
3540}
3541
72ec24bd
TH		 3542/**
3543 * sd_unlock_native_capacity - unlock native capacity
3544 * @disk: struct gendisk to set capacity for
3545 *
3546 * Block layer calls this function if it detects that partitions
3547 * on @disk reach beyond the end of the device. If the SCSI host
3548 * implements ->unlock_native_capacity() method, it's invoked to
3549 * give it a chance to adjust the device capacity.
3550 *
3551 * CONTEXT:
3552 * Defined by block layer. Might sleep.
3553 */
3554static void sd_unlock_native_capacity(struct gendisk *disk)
3555{
3556 struct scsi_device *sdev = scsi_disk(disk)->device;
3557
3558 if (sdev->host->hostt->unlock_native_capacity)
3559 sdev->host->hostt->unlock_native_capacity(sdev);
3560}
3561
3e1a7ff8
TH		 3562/**
3563 * sd_format_disk_name - format disk name
3564 * @prefix: name prefix - ie. "sd" for SCSI disks
3565 * @index: index of the disk to format name for
3566 * @buf: output buffer
3567 * @buflen: length of the output buffer
3568 *
3569 * SCSI disk names starts at sda. The 26th device is sdz and the
3570 * 27th is sdaa. The last one for two lettered suffix is sdzz
3571 * which is followed by sdaaa.
3572 *
3573 * This is basically 26 base counting with one extra 'nil' entry
3ad2f3fb 3574 * at the beginning from the second digit on and can be
3e1a7ff8
TH		 3575 * determined using similar method as 26 base conversion with the
3576 * index shifted -1 after each digit is computed.
3577 *
3578 * CONTEXT:
3579 * Don't care.
3580 *
3581 * RETURNS:
3582 * 0 on success, -errno on failure.
3583 */
3584static int sd_format_disk_name(char *prefix, int index, char *buf, int buflen)
3585{
3586 const int base = 'z' - 'a' + 1;
3587 char *begin = buf + strlen(prefix);
3588 char *end = buf + buflen;
3589 char *p;
3590 int unit;
3591
3592 p = end - 1;
3593 *p = '\0';
3594 unit = base;
3595 do {
3596 if (p == begin)
3597 return -EINVAL;
3598 *--p = 'a' + (index % unit);
3599 index = (index / unit) - 1;
3600 } while (index >= 0);
3601
3602 memmove(begin, p, end - p);
3603 memcpy(buf, prefix, strlen(prefix));
3604
3605 return 0;
3606}
3607
1da177e4
LT		 3608/**
3609 * sd_probe - called during driver initialization and whenever a
3610 * new scsi device is attached to the system. It is called once
3611 * for each scsi device (not just disks) present.
3612 * @dev: pointer to device object
3613 *
3614 * Returns 0 if successful (or not interested in this scsi device
3615 * (e.g. scanner)); 1 when there is an error.
3616 *
3617 * Note: this function is invoked from the scsi mid-level.
3618 * This function sets up the mapping between a given
3619 * <host,channel,id,lun> (found in sdp) and new device name
3620 * (e.g. /dev/sda). More precisely it is the block device major
3621 * and minor number that is chosen here.
3622 *
2db93ce8
PU		 3623 * Assume sd_probe is not re-entrant (for time being)
3624 * Also think about sd_probe() and sd_remove() running coincidentally.
1da177e4
LT		 3625 **/
3626static int sd_probe(struct device *dev)
3627{
3628 struct scsi_device *sdp = to_scsi_device(dev);
3629 struct scsi_disk *sdkp;
3630 struct gendisk *gd;
439d77f7 3631 int index;
1da177e4
LT		 3632 int error;
3633
6fe8c1db 3634 scsi_autopm_get_device(sdp);
1da177e4 3635 error = -ENODEV;
89d94756
HR		 3636 if (sdp->type != TYPE_DISK &&
3637 sdp->type != TYPE_ZBC &&
3638 sdp->type != TYPE_MOD &&
3639 sdp->type != TYPE_RBC)
1da177e4
LT		 3640 goto out;
3641
bf1b4659
DLM		 3642 if (!IS_ENABLED(CONFIG_BLK_DEV_ZONED) && sdp->type == TYPE_ZBC) {
3643 sdev_printk(KERN_WARNING, sdp,
3644 "Unsupported ZBC host-managed device.\n");
89d94756 3645 goto out;
bf1b4659
DLM		 3646 }
3647
9ccfc756 3648 SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO, sdp,
2db93ce8 3649 "sd_probe\n"));
1da177e4
LT		 3650
3651 error = -ENOMEM;
24669f75 3652 sdkp = kzalloc(sizeof(*sdkp), GFP_KERNEL);
1da177e4
LT		 3653 if (!sdkp)
3654 goto out;
3655
6f8191fd
CH		 3656 gd = blk_mq_alloc_disk_for_queue(sdp->request_queue,
3657 &sd_bio_compl_lkclass);
1da177e4 3658 if (!gd)
c01228db 3659 goto out_free;
1da177e4 3660
94015080
MW		 3661 index = ida_alloc(&sd_index_ida, GFP_KERNEL);
3662 if (index < 0) {
21208ae5 3663 sdev_printk(KERN_WARNING, sdp, "sd_probe: memory exhausted.\n");
1da177e4 3664 goto out_put;
1a03ae0f
MR		 3665 }
3666
3e1a7ff8 3667 error = sd_format_disk_name("sd", index, gd->disk_name, DISK_NAME_LEN);
21208ae5
DK		 3668 if (error) {
3669 sdev_printk(KERN_WARNING, sdp, "SCSI disk (sd) name length exceeded.\n");
f27bac27 3670 goto out_free_index;
21208ae5 3671 }
f27bac27 3672
1da177e4 3673 sdkp->device = sdp;
1da177e4
LT		 3674 sdkp->disk = gd;
3675 sdkp->index = index;
0610959f 3676 sdkp->max_retries = SD_MAX_RETRIES;
409f3499 3677 atomic_set(&sdkp->openers, 0);
9e1a1537 3678 atomic_set(&sdkp->device->ioerr_cnt, 0);
1da177e4 3679
601e7638
JB		 3680 if (!sdp->request_queue->rq_timeout) {
3681 if (sdp->type != TYPE_MOD)
3682 blk_queue_rq_timeout(sdp->request_queue, SD_TIMEOUT);
3683 else
3684 blk_queue_rq_timeout(sdp->request_queue,
3685 SD_MOD_TIMEOUT);
3686 }
3687
fad45c30
CH		 3688 device_initialize(&sdkp->disk_dev);
3689 sdkp->disk_dev.parent = get_device(dev);
3690 sdkp->disk_dev.class = &sd_disk_class;
3691 dev_set_name(&sdkp->disk_dev, "%s", dev_name(dev));
601e7638 3692
fad45c30 3693 error = device_add(&sdkp->disk_dev);
265dfe8e 3694 if (error) {
fad45c30 3695 put_device(&sdkp->disk_dev);
265dfe8e
ML		 3696 goto out;
3697 }
601e7638 3698
478a8a05 3699 dev_set_drvdata(dev, sdkp);
601e7638 3700
82a54da6
BVA		 3701 gd->major = sd_major((index & 0xf0) >> 4);
3702 gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00);
a58bd768 3703 gd->minors = SD_MINORS;
82a54da6
BVA		 3704
3705 gd->fops = &sd_fops;
e7f76552 3706 gd->private_data = sdkp;
82a54da6
BVA		 3707
3708 /* defaults, until the device tells us otherwise */
3709 sdp->sector_size = 512;
3710 sdkp->capacity = 0;
3711 sdkp->media_present = 1;
3712 sdkp->write_prot = 0;
3713 sdkp->cache_override = 0;
3714 sdkp->WCE = 0;
3715 sdkp->RCD = 0;
3716 sdkp->ATO = 0;
3717 sdkp->first_scan = 1;
3718 sdkp->max_medium_access_timeouts = SD_MAX_MEDIUM_TIMEOUTS;
3719
3720 sd_revalidate_disk(gd);
3721
82a54da6
BVA		 3722 if (sdp->removable) {
3723 gd->flags |= GENHD_FL_REMOVABLE;
3724 gd->events |= DISK_EVENT_MEDIA_CHANGE;
3725 gd->event_flags = DISK_EVENT_FLAG_POLL | DISK_EVENT_FLAG_UEVENT;
3726 }
3727
3728 blk_pm_runtime_init(sdp->request_queue, dev);
c74f8056
SC		 3729 if (sdp->rpm_autosuspend) {
3730 pm_runtime_set_autosuspend_delay(dev,
3731 sdp->host->hostt->rpm_autosuspend_delay);
3732 }
2a7a891f
LC		 3733
3734 error = device_add_disk(dev, gd, NULL);
3735 if (error) {
fad45c30 3736 put_device(&sdkp->disk_dev);
7274ce05 3737 put_disk(gd);
2a7a891f
LC		 3738 goto out;
3739 }
3740
82a54da6 3741 if (sdkp->security) {
0610959f 3742 sdkp->opal_dev = init_opal_dev(sdkp, &sd_sec_submit);
82a54da6
BVA		 3743 if (sdkp->opal_dev)
3744 sd_printk(KERN_NOTICE, sdkp, "supports TCG Opal\n");
3745 }
3746
3747 sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n",
3748 sdp->removable ? "removable " : "");
3749 scsi_autopm_put_device(sdp);
1da177e4
LT		 3750
3751 return 0;
3752
f27bac27 3753 out_free_index:
94015080 3754 ida_free(&sd_index_ida, index);
6bdaa1f1 3755 out_put:
1da177e4 3756 put_disk(gd);
f170396c
CIK		 3757 out_free:
3758 kfree(sdkp);
6bdaa1f1 3759 out:
6fe8c1db 3760 scsi_autopm_put_device(sdp);
1da177e4
LT		 3761 return error;
3762}
3763
3764/**
3765 * sd_remove - called whenever a scsi disk (previously recognized by
3766 * sd_probe) is detached from the system. It is called (potentially
3767 * multiple times) during sd module unload.
f2a3313d 3768 * @dev: pointer to device object
1da177e4
LT		 3769 *
3770 * Note: this function is invoked from the scsi mid-level.
3771 * This function potentially frees up a device name (e.g. /dev/sdc)
3772 * that could be re-used by a subsequent sd_probe().
3773 * This function is not called when the built-in sd driver is "exit-ed".
3774 **/
3775static int sd_remove(struct device *dev)
3776{
9c63f7f6 3777 struct scsi_disk *sdkp = dev_get_drvdata(dev);
1da177e4 3778
478a8a05
AS		 3779 scsi_autopm_get_device(sdkp->device);
3780
fad45c30 3781 device_del(&sdkp->disk_dev);
1da177e4 3782 del_gendisk(sdkp->disk);
99398d20
DLM		 3783 if (!sdkp->suspended)
3784 sd_shutdown(dev);
39b7f1e2 3785
9c63f7f6 3786 put_disk(sdkp->disk);
1da177e4
LT		 3787 return 0;
3788}
3789
ee959b00 3790static void scsi_disk_release(struct device *dev)
1da177e4 3791{
ee959b00 3792 struct scsi_disk *sdkp = to_scsi_disk(dev);
c14a5726 3793
94015080 3794 ida_free(&sd_index_ida, sdkp->index);
30c4fdc3 3795 sd_zbc_free_zone_info(sdkp);
c76c46fa 3796 put_device(&sdkp->device->sdev_gendev);
534cf52a 3797 free_opal_dev(sdkp->opal_dev);
5795eb44 3798
1da177e4
LT		 3799 kfree(sdkp);
3800}
3801
cc5d2c8c 3802static int sd_start_stop_device(struct scsi_disk *sdkp, int start)
c3c94c5a
TH		 3803{
3804 unsigned char cmd[6] = { START_STOP }; /* START_VALID */
785538bf 3805 struct scsi_sense_hdr sshdr;
af16cd63
MC		 3806 const struct scsi_exec_args exec_args = {
3807 .sshdr = &sshdr,
3808 .req_flags = BLK_MQ_REQ_PM,
3809 };
cc5d2c8c 3810 struct scsi_device *sdp = sdkp->device;
785538bf 3811 int res;
c3c94c5a
TH		 3812
3813 if (start)
3814 cmd[4] |= 1; /* START */
3815
d2886ea3
SR		 3816 if (sdp->start_stop_pwr_cond)
3817 cmd[4] |= start ? 1 << 4 : 3 << 4; /* Active or Standby */
3818
c3c94c5a
TH		 3819 if (!scsi_device_online(sdp))
3820 return -ENODEV;
3821
af16cd63
MC		 3822 res = scsi_execute_cmd(sdp, cmd, REQ_OP_DRV_IN, NULL, 0, SD_TIMEOUT,
3823 sdkp->max_retries, &exec_args);
785538bf
BVA		 3824 if (res) {
3825 sd_print_result(sdkp, "Start/Stop Unit failed", res);
3826 if (res > 0 && scsi_sense_valid(&sshdr)) {
3827 sd_print_sense_hdr(sdkp, &sshdr);
3828 /* 0x3a is medium not present */
3829 if (sshdr.asc == 0x3a)
3830 res = 0;
3831 }
3832 }
c3c94c5a 3833
785538bf
BVA		 3834 /* SCSI error codes must not go to the generic layer */
3835 if (res)
3836 return -EIO;
3837
3838 return 0;
c3c94c5a
TH		 3839}
3840
1da177e4
LT		 3841/*
3842 * Send a SYNCHRONIZE CACHE instruction down to the device through
3843 * the normal SCSI command structure. Wait for the command to
3844 * complete.
3845 */
3846static void sd_shutdown(struct device *dev)
3847{
3d9a1f53 3848 struct scsi_disk *sdkp = dev_get_drvdata(dev);
1da177e4
LT		 3849
3850 if (!sdkp)
3851 return; /* this can happen */
3852
54f57588 3853 if (pm_runtime_suspended(dev))
3d9a1f53 3854 return;
54f57588 3855
95897910 3856 if (sdkp->WCE && sdkp->media_present) {
e73aec82 3857 sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n");
3b834863 3858 sd_sync_cache(sdkp);
39b7f1e2 3859 }
c3c94c5a 3860
24eca2dc
DLM		 3861 if ((system_state != SYSTEM_RESTART &&
3862 sdkp->device->manage_system_start_stop) ||
3863 (system_state == SYSTEM_POWER_OFF &&
3864 sdkp->device->manage_shutdown)) {
cc5d2c8c
JB		 3865 sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n");
3866 sd_start_stop_device(sdkp, 0);
c3c94c5a 3867 }
39b7f1e2 3868}
1da177e4 3869
3cc2ffe5
DLM		 3870static inline bool sd_do_start_stop(struct scsi_device *sdev, bool runtime)
3871{
3872 return (sdev->manage_system_start_stop && !runtime) ||
3873 (sdev->manage_runtime_start_stop && runtime);
3874}
3875
3876static int sd_suspend_common(struct device *dev, bool runtime)
c3c94c5a 3877{
3d9a1f53 3878 struct scsi_disk *sdkp = dev_get_drvdata(dev);
09ff92fe 3879 int ret = 0;
c3c94c5a 3880
13b43891
AS		 3881 if (!sdkp) /* E.g.: runtime suspend following sd_remove() */
3882 return 0;
c3c94c5a 3883
95897910 3884 if (sdkp->WCE && sdkp->media_present) {
af4edb1d
AH		 3885 if (!sdkp->device->silence_suspend)
3886 sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n");
3b834863
MC		 3887 ret = sd_sync_cache(sdkp);
3888 /* ignore OFFLINE device */
3889 if (ret == -ENODEV)
3890 return 0;
4fa83244 3891
3b834863
MC		 3892 if (ret)
3893 return ret;
c3c94c5a
TH		 3894 }
3895
3cc2ffe5 3896 if (sd_do_start_stop(sdkp->device, runtime)) {
af4edb1d
AH		 3897 if (!sdkp->device->silence_suspend)
3898 sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n");
95897910 3899 /* an error is not worth aborting a system sleep */
cc5d2c8c 3900 ret = sd_start_stop_device(sdkp, 0);
3cc2ffe5 3901 if (!runtime)
95897910 3902 ret = 0;
c3c94c5a
TH		 3903 }
3904
99398d20
DLM		 3905 if (!ret)
3906 sdkp->suspended = true;
3907
09ff92fe 3908 return ret;
c3c94c5a
TH		 3909}
3910
95897910
ON		 3911static int sd_suspend_system(struct device *dev)
3912{
9131bff6
BVA		 3913 if (pm_runtime_suspended(dev))
3914 return 0;
3915
3cc2ffe5 3916 return sd_suspend_common(dev, false);
95897910
ON		 3917}
3918
3919static int sd_suspend_runtime(struct device *dev)
3920{
3cc2ffe5 3921 return sd_suspend_common(dev, true);
95897910
ON		 3922}
3923
3cc2ffe5 3924static int sd_resume(struct device *dev, bool runtime)
c3c94c5a 3925{
3d9a1f53 3926 struct scsi_disk *sdkp = dev_get_drvdata(dev);
c4367ac8 3927 int ret;
c3c94c5a 3928
13b43891
AS		 3929 if (!sdkp) /* E.g.: runtime resume at the start of sd_probe() */
3930 return 0;
3931
99398d20
DLM		 3932 if (!sd_do_start_stop(sdkp->device, runtime)) {
3933 sdkp->suspended = false;
3d9a1f53 3934 return 0;
99398d20 3935 }
c3c94c5a 3936
c4367ac8
DLM		 3937 sd_printk(KERN_NOTICE, sdkp, "Starting disk\n");
3938 ret = sd_start_stop_device(sdkp, 1);
99398d20 3939 if (!ret) {
d80210f2 3940 opal_unlock_from_suspend(sdkp->opal_dev);
99398d20
DLM		 3941 sdkp->suspended = false;
3942 }
3943
d80210f2 3944 return ret;
c3c94c5a
TH		 3945}
3946
1c957532
BVA		 3947static int sd_resume_system(struct device *dev)
3948{
b09d7f8f
DLM		 3949 if (pm_runtime_suspended(dev)) {
3950 struct scsi_disk *sdkp = dev_get_drvdata(dev);
3951 struct scsi_device *sdp = sdkp ? sdkp->device : NULL;
3952
3953 if (sdp && sdp->force_runtime_start_on_system_start)
3954 pm_request_resume(dev);
3955
9131bff6 3956 return 0;
b09d7f8f 3957 }
9131bff6 3958
3cc2ffe5 3959 return sd_resume(dev, false);
1c957532
BVA		 3960}
3961
ed4246d3
MK		 3962static int sd_resume_runtime(struct device *dev)
3963{
3964 struct scsi_disk *sdkp = dev_get_drvdata(dev);
85374b63
MC		 3965 struct scsi_device *sdp;
3966
3967 if (!sdkp) /* E.g.: runtime resume at the start of sd_probe() */
3968 return 0;
3969
3970 sdp = sdkp->device;
ed4246d3
MK		 3971
3972 if (sdp->ignore_media_change) {
3973 /* clear the device's sense data */
3974 static const u8 cmd[10] = { REQUEST_SENSE };
af16cd63
MC		 3975 const struct scsi_exec_args exec_args = {
3976 .req_flags = BLK_MQ_REQ_PM,
3977 };
ed4246d3 3978
af16cd63
MC		 3979 if (scsi_execute_cmd(sdp, cmd, REQ_OP_DRV_IN, NULL, 0,
3980 sdp->request_queue->rq_timeout, 1,
3981 &exec_args))
ed4246d3
MK		 3982 sd_printk(KERN_NOTICE, sdkp,
3983 "Failed to clear sense data\n");
3984 }
3985
3cc2ffe5 3986 return sd_resume(dev, true);
ed4246d3
MK		 3987}
3988
efcf965a
BVA		 3989static const struct dev_pm_ops sd_pm_ops = {
3990 .suspend = sd_suspend_system,
3991 .resume = sd_resume_system,
3992 .poweroff = sd_suspend_system,
3993 .restore = sd_resume_system,
3994 .runtime_suspend = sd_suspend_runtime,
3995 .runtime_resume = sd_resume_runtime,
3996};
3997
3998static struct scsi_driver sd_template = {
3999 .gendrv = {
4000 .name = "sd",
4001 .owner = THIS_MODULE,
4002 .probe = sd_probe,
4003 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
4004 .remove = sd_remove,
4005 .shutdown = sd_shutdown,
4006 .pm = &sd_pm_ops,
4007 },
4008 .rescan = sd_rescan,
4009 .init_command = sd_init_command,
4010 .uninit_command = sd_uninit_command,
4011 .done = sd_done,
4012 .eh_action = sd_eh_action,
4013 .eh_reset = sd_eh_reset,
4014};
4015
1da177e4
LT		 4016/**
4017 * init_sd - entry point for this driver (both when built in or when
4018 * a module).
4019 *
4020 * Note: this function registers this driver with the scsi mid-level.
4021 **/
4022static int __init init_sd(void)
4023{
5e4009ba 4024 int majors = 0, i, err;
1da177e4
LT		 4025
4026 SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n"));
4027
0761df9c 4028 for (i = 0; i < SD_MAJORS; i++) {
996e509b 4029 if (__register_blkdev(sd_major(i), "sd", sd_default_probe))
0761df9c
HR		 4030 continue;
4031 majors++;
0761df9c 4032 }
1da177e4
LT		 4033
4034 if (!majors)
4035 return -ENODEV;
4036
5e4009ba
JG		 4037 err = class_register(&sd_disk_class);
4038 if (err)
4039 goto err_out;
6bdaa1f1 4040
61cce6f6
JA		 4041 sd_page_pool = mempool_create_page_pool(SD_MEMPOOL_SIZE, 0);
4042 if (!sd_page_pool) {
4043 printk(KERN_ERR "sd: can't init discard page pool\n");
4044 err = -ENOMEM;
2b379516 4045 goto err_out_class;
61cce6f6
JA		 4046 }
4047
afd5e34b
JD		 4048 err = scsi_register_driver(&sd_template.gendrv);
4049 if (err)
4050 goto err_out_driver;
4051
5e4009ba
JG		 4052 return 0;
4053
afd5e34b 4054err_out_driver:
61cce6f6 4055 mempool_destroy(sd_page_pool);
5e4009ba
JG		 4056err_out_class:
4057 class_unregister(&sd_disk_class);
4058err_out:
4059 for (i = 0; i < SD_MAJORS; i++)
4060 unregister_blkdev(sd_major(i), "sd");
4061 return err;
1da177e4
LT		 4062}
4063
4064/**
4065 * exit_sd - exit point for this driver (when it is a module).
4066 *
4067 * Note: this function unregisters this driver from the scsi mid-level.
4068 **/
4069static void __exit exit_sd(void)
4070{
4071 int i;
4072
4073 SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n"));
4074
afd5e34b 4075 scsi_unregister_driver(&sd_template.gendrv);
61cce6f6 4076 mempool_destroy(sd_page_pool);
4e7392ec 4077
5e4009ba
JG		 4078 class_unregister(&sd_disk_class);
4079
996e509b 4080 for (i = 0; i < SD_MAJORS; i++)
1da177e4
LT		 4081 unregister_blkdev(sd_major(i), "sd");
4082}
4083
1da177e4
LT		 4084module_init(init_sd);
4085module_exit(exit_sd);
e73aec82 4086
a35989a0 4087void sd_print_sense_hdr(struct scsi_disk *sdkp, struct scsi_sense_hdr *sshdr)
e73aec82 4088{
21045519
HR		 4089 scsi_print_sense_hdr(sdkp->device,
4090 sdkp->disk ? sdkp->disk->disk_name : NULL, sshdr);
e73aec82
MP		 4091}
4092
a35989a0 4093void sd_print_result(const struct scsi_disk *sdkp, const char *msg, int result)
e73aec82 4094{
ef61329d 4095 const char *hb_string = scsi_hostbyte_string(result);
ef61329d 4096
54c29086 4097 if (hb_string)
ef61329d
HR		 4098 sd_printk(KERN_INFO, sdkp,
4099 "%s: Result: hostbyte=%s driverbyte=%s\n", msg,
4100 hb_string ? hb_string : "invalid",
54c29086 4101 "DRIVER_OK");
ef61329d
HR		 4102 else
4103 sd_printk(KERN_INFO, sdkp,
54c29086
HR		 4104 "%s: Result: hostbyte=0x%02x driverbyte=%s\n",
4105 msg, host_byte(result), "DRIVER_OK");
e73aec82 4106}
Linux 6.x block layer and io_uring tree(s)