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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[linux-2.6-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>
41#include <linux/genhd.h>
42#include <linux/hdreg.h>
43#include <linux/errno.h>
44#include <linux/idr.h>
45#include <linux/interrupt.h>
46#include <linux/init.h>
47#include <linux/blkdev.h>
48#include <linux/blkpg.h>
bca6b067 49#include <linux/blk-pm.h>
1da177e4 50#include <linux/delay.h>
b81e0c23 51#include <linux/major.h>
0b950672 52#include <linux/mutex.h>
7404ad3b 53#include <linux/string_helpers.h>
5a0e3ad6 54#include <linux/slab.h>
d80210f2 55#include <linux/sed-opal.h>
54f57588 56#include <linux/pm_runtime.h>
924d55b0 57#include <linux/pr.h>
8475c811 58#include <linux/t10-pi.h>
7c0f6ba6 59#include <linux/uaccess.h>
8f76d151 60#include <asm/unaligned.h>
1da177e4
LT		 61
62#include <scsi/scsi.h>
63#include <scsi/scsi_cmnd.h>
64#include <scsi/scsi_dbg.h>
65#include <scsi/scsi_device.h>
66#include <scsi/scsi_driver.h>
67#include <scsi/scsi_eh.h>
68#include <scsi/scsi_host.h>
69#include <scsi/scsi_ioctl.h>
1da177e4
LT		 70#include <scsi/scsicam.h>
71
aa91696e 72#include "sd.h"
a7a20d10 73#include "scsi_priv.h"
1da177e4
LT		 74#include "scsi_logging.h"
75
f018fa55
RH		 76MODULE_AUTHOR("Eric Youngdale");
77MODULE_DESCRIPTION("SCSI disk (sd) driver");
78MODULE_LICENSE("GPL");
79
80MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK0_MAJOR);
81MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK1_MAJOR);
82MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK2_MAJOR);
83MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK3_MAJOR);
84MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK4_MAJOR);
85MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK5_MAJOR);
86MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK6_MAJOR);
87MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK7_MAJOR);
88MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK8_MAJOR);
89MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK9_MAJOR);
90MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK10_MAJOR);
91MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK11_MAJOR);
92MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK12_MAJOR);
93MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK13_MAJOR);
94MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK14_MAJOR);
95MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK15_MAJOR);
d7b8bcb0
MT		 96MODULE_ALIAS_SCSI_DEVICE(TYPE_DISK);
97MODULE_ALIAS_SCSI_DEVICE(TYPE_MOD);
98MODULE_ALIAS_SCSI_DEVICE(TYPE_RBC);
89d94756 99MODULE_ALIAS_SCSI_DEVICE(TYPE_ZBC);
f018fa55 100
f615b48c 101#define SD_MINORS 16
870d6656 102
c98a0eb0 103static void sd_config_discard(struct scsi_disk *, unsigned int);
5db44863 104static void sd_config_write_same(struct scsi_disk *);
7b3d9545 105static int sd_revalidate_disk(struct gendisk *);
72ec24bd 106static void sd_unlock_native_capacity(struct gendisk *disk);
7b3d9545
LT		 107static int sd_probe(struct device *);
108static int sd_remove(struct device *);
109static void sd_shutdown(struct device *);
95897910
ON		 110static int sd_suspend_system(struct device *);
111static int sd_suspend_runtime(struct device *);
1c957532 112static int sd_resume_system(struct device *);
ed4246d3 113static int sd_resume_runtime(struct device *);
7b3d9545 114static void sd_rescan(struct device *);
159b2cbf 115static blk_status_t sd_init_command(struct scsi_cmnd *SCpnt);
a1b73fc1 116static void sd_uninit_command(struct scsi_cmnd *SCpnt);
7b3d9545 117static int sd_done(struct scsi_cmnd *);
7a38dc0b 118static void sd_eh_reset(struct scsi_cmnd *);
2451079b 119static int sd_eh_action(struct scsi_cmnd *, int);
7b3d9545 120static void sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer);
ee959b00 121static void scsi_disk_release(struct device *cdev);
7b3d9545 122
f27bac27 123static DEFINE_IDA(sd_index_ida);
1da177e4
LT		 124
125/* This semaphore is used to mediate the 0->1 reference get in the
126 * face of object destruction (i.e. we can't allow a get on an
127 * object after last put) */
0b950672 128static DEFINE_MUTEX(sd_ref_mutex);
1da177e4 129
439d77f7
HS		 130static struct kmem_cache *sd_cdb_cache;
131static mempool_t *sd_cdb_pool;
61cce6f6 132static mempool_t *sd_page_pool;
9c2b9dba 133static struct lock_class_key sd_bio_compl_lkclass;
4e7392ec 134
6bdaa1f1
JB		 135static const char *sd_cache_types[] = {
136 "write through", "none", "write back",
137 "write back, no read (daft)"
138};
139
cb2fb68d
VC		 140static void sd_set_flush_flag(struct scsi_disk *sdkp)
141{
eb310e23 142 bool wc = false, fua = false;
cb2fb68d
VC		 143
144 if (sdkp->WCE) {
eb310e23 145 wc = true;
cb2fb68d 146 if (sdkp->DPOFUA)
eb310e23 147 fua = true;
cb2fb68d
VC		 148 }
149
eb310e23 150 blk_queue_write_cache(sdkp->disk->queue, wc, fua);
cb2fb68d
VC		 151}
152
ee959b00 153static ssize_t
e1ea2351
GKH		 154cache_type_store(struct device *dev, struct device_attribute *attr,
155 const char *buf, size_t count)
6bdaa1f1 156{
4c11712a 157 int ct, rcd, wce, sp;
ee959b00 158 struct scsi_disk *sdkp = to_scsi_disk(dev);
6bdaa1f1
JB		 159 struct scsi_device *sdp = sdkp->device;
160 char buffer[64];
161 char *buffer_data;
162 struct scsi_mode_data data;
163 struct scsi_sense_hdr sshdr;
2ee3e26c 164 static const char temp[] = "temporary ";
6bdaa1f1
JB		 165 int len;
166
89d94756 167 if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC)
6bdaa1f1
JB		 168 /* no cache control on RBC devices; theoretically they
169 * can do it, but there's probably so many exceptions
170 * it's not worth the risk */
171 return -EINVAL;
172
39c60a09
JB		 173 if (strncmp(buf, temp, sizeof(temp) - 1) == 0) {
174 buf += sizeof(temp) - 1;
175 sdkp->cache_override = 1;
176 } else {
177 sdkp->cache_override = 0;
178 }
179
4c11712a 180 ct = sysfs_match_string(sd_cache_types, buf);
6bdaa1f1
JB		 181 if (ct < 0)
182 return -EINVAL;
4c11712a 183
6bdaa1f1 184 rcd = ct & 0x01 ? 1 : 0;
2eefd57b 185 wce = (ct & 0x02) && !sdkp->write_prot ? 1 : 0;
39c60a09
JB		 186
187 if (sdkp->cache_override) {
188 sdkp->WCE = wce;
189 sdkp->RCD = rcd;
cb2fb68d 190 sd_set_flush_flag(sdkp);
39c60a09
JB		 191 return count;
192 }
193
6bdaa1f1 194 if (scsi_mode_sense(sdp, 0x08, 8, buffer, sizeof(buffer), SD_TIMEOUT,
0610959f 195 sdkp->max_retries, &data, NULL))
6bdaa1f1 196 return -EINVAL;
a9312fb8 197 len = min_t(size_t, sizeof(buffer), data.length - data.header_length -
6bdaa1f1
JB		 198 data.block_descriptor_length);
199 buffer_data = buffer + data.header_length +
200 data.block_descriptor_length;
201 buffer_data[2] &= ~0x05;
202 buffer_data[2] |= wce << 2 | rcd;
203 sp = buffer_data[0] & 0x80 ? 1 : 0;
2c5d16d6 204 buffer_data[0] &= ~0x80;
6bdaa1f1 205
44759979
IM		 206 /*
207 * Ensure WP, DPOFUA, and RESERVED fields are cleared in
208 * received mode parameter buffer before doing MODE SELECT.
209 */
210 data.device_specific = 0;
211
6bdaa1f1 212 if (scsi_mode_select(sdp, 1, sp, 8, buffer_data, len, SD_TIMEOUT,
0610959f 213 sdkp->max_retries, &data, &sshdr)) {
6bdaa1f1 214 if (scsi_sense_valid(&sshdr))
e73aec82 215 sd_print_sense_hdr(sdkp, &sshdr);
6bdaa1f1
JB		 216 return -EINVAL;
217 }
033a1b98 218 sd_revalidate_disk(sdkp->disk);
6bdaa1f1
JB		 219 return count;
220}
221
ee959b00 222static ssize_t
e1ea2351
GKH		 223manage_start_stop_show(struct device *dev, struct device_attribute *attr,
224 char *buf)
225{
226 struct scsi_disk *sdkp = to_scsi_disk(dev);
227 struct scsi_device *sdp = sdkp->device;
228
4c11712a 229 return sprintf(buf, "%u\n", sdp->manage_start_stop);
e1ea2351
GKH		 230}
231
232static ssize_t
233manage_start_stop_store(struct device *dev, struct device_attribute *attr,
234 const char *buf, size_t count)
c3c94c5a 235{
ee959b00 236 struct scsi_disk *sdkp = to_scsi_disk(dev);
c3c94c5a 237 struct scsi_device *sdp = sdkp->device;
623401ee 238 bool v;
c3c94c5a
TH		 239
240 if (!capable(CAP_SYS_ADMIN))
241 return -EACCES;
242
623401ee 243 if (kstrtobool(buf, &v))
244 return -EINVAL;
245
246 sdp->manage_start_stop = v;
c3c94c5a
TH		 247
248 return count;
249}
e1ea2351 250static DEVICE_ATTR_RW(manage_start_stop);
c3c94c5a 251
ee959b00 252static ssize_t
e1ea2351
GKH		 253allow_restart_show(struct device *dev, struct device_attribute *attr, char *buf)
254{
255 struct scsi_disk *sdkp = to_scsi_disk(dev);
256
4c11712a 257 return sprintf(buf, "%u\n", sdkp->device->allow_restart);
e1ea2351
GKH		 258}
259
260static ssize_t
261allow_restart_store(struct device *dev, struct device_attribute *attr,
262 const char *buf, size_t count)
a144c5ae 263{
658e9a6d 264 bool v;
ee959b00 265 struct scsi_disk *sdkp = to_scsi_disk(dev);
a144c5ae
BK		 266 struct scsi_device *sdp = sdkp->device;
267
268 if (!capable(CAP_SYS_ADMIN))
269 return -EACCES;
270
89d94756 271 if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC)
a144c5ae
BK		 272 return -EINVAL;
273
658e9a6d 274 if (kstrtobool(buf, &v))
275 return -EINVAL;
276
277 sdp->allow_restart = v;
a144c5ae
BK		 278
279 return count;
280}
e1ea2351 281static DEVICE_ATTR_RW(allow_restart);
a144c5ae 282
ee959b00 283static ssize_t
e1ea2351 284cache_type_show(struct device *dev, struct device_attribute *attr, char *buf)
6bdaa1f1 285{
ee959b00 286 struct scsi_disk *sdkp = to_scsi_disk(dev);
6bdaa1f1
JB		 287 int ct = sdkp->RCD + 2*sdkp->WCE;
288
4c11712a 289 return sprintf(buf, "%s\n", sd_cache_types[ct]);
6bdaa1f1 290}
e1ea2351 291static DEVICE_ATTR_RW(cache_type);
6bdaa1f1 292
ee959b00 293static ssize_t
e1ea2351 294FUA_show(struct device *dev, struct device_attribute *attr, char *buf)
6bdaa1f1 295{
ee959b00 296 struct scsi_disk *sdkp = to_scsi_disk(dev);
6bdaa1f1 297
4c11712a 298 return sprintf(buf, "%u\n", sdkp->DPOFUA);
6bdaa1f1 299}
e1ea2351 300static DEVICE_ATTR_RO(FUA);
6bdaa1f1 301
ee959b00 302static ssize_t
e1ea2351
GKH		 303protection_type_show(struct device *dev, struct device_attribute *attr,
304 char *buf)
e0597d70
MP		 305{
306 struct scsi_disk *sdkp = to_scsi_disk(dev);
307
4c11712a 308 return sprintf(buf, "%u\n", sdkp->protection_type);
e0597d70
MP		 309}
310
8172499a 311static ssize_t
e1ea2351
GKH		 312protection_type_store(struct device *dev, struct device_attribute *attr,
313 const char *buf, size_t count)
8172499a
MP		 314{
315 struct scsi_disk *sdkp = to_scsi_disk(dev);
316 unsigned int val;
317 int err;
318
319 if (!capable(CAP_SYS_ADMIN))
320 return -EACCES;
321
322 err = kstrtouint(buf, 10, &val);
323
324 if (err)
325 return err;
326
830cc351 327 if (val <= T10_PI_TYPE3_PROTECTION)
8172499a
MP		 328 sdkp->protection_type = val;
329
330 return count;
331}
e1ea2351 332static DEVICE_ATTR_RW(protection_type);
8172499a 333
518fa8e3 334static ssize_t
e1ea2351
GKH		 335protection_mode_show(struct device *dev, struct device_attribute *attr,
336 char *buf)
518fa8e3
MP		 337{
338 struct scsi_disk *sdkp = to_scsi_disk(dev);
339 struct scsi_device *sdp = sdkp->device;
340 unsigned int dif, dix;
341
342 dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type);
343 dix = scsi_host_dix_capable(sdp->host, sdkp->protection_type);
344
8475c811 345 if (!dix && scsi_host_dix_capable(sdp->host, T10_PI_TYPE0_PROTECTION)) {
518fa8e3
MP		 346 dif = 0;
347 dix = 1;
348 }
349
350 if (!dif && !dix)
4c11712a 351 return sprintf(buf, "none\n");
518fa8e3 352
4c11712a 353 return sprintf(buf, "%s%u\n", dix ? "dix" : "dif", dif);
518fa8e3 354}
e1ea2351 355static DEVICE_ATTR_RO(protection_mode);
518fa8e3 356
e0597d70 357static ssize_t
e1ea2351 358app_tag_own_show(struct device *dev, struct device_attribute *attr, char *buf)
e0597d70
MP		 359{
360 struct scsi_disk *sdkp = to_scsi_disk(dev);
361
4c11712a 362 return sprintf(buf, "%u\n", sdkp->ATO);
e0597d70 363}
e1ea2351 364static DEVICE_ATTR_RO(app_tag_own);
e0597d70 365
e339c1a7 366static ssize_t
e1ea2351
GKH		 367thin_provisioning_show(struct device *dev, struct device_attribute *attr,
368 char *buf)
e339c1a7
MP		 369{
370 struct scsi_disk *sdkp = to_scsi_disk(dev);
371
4c11712a 372 return sprintf(buf, "%u\n", sdkp->lbpme);
c98a0eb0 373}
e1ea2351 374static DEVICE_ATTR_RO(thin_provisioning);
c98a0eb0 375
4c11712a 376/* sysfs_match_string() requires dense arrays */
c98a0eb0
MP		 377static const char *lbp_mode[] = {
378 [SD_LBP_FULL] = "full",
379 [SD_LBP_UNMAP] = "unmap",
380 [SD_LBP_WS16] = "writesame_16",
381 [SD_LBP_WS10] = "writesame_10",
382 [SD_LBP_ZERO] = "writesame_zero",
383 [SD_LBP_DISABLE] = "disabled",
384};
385
386static ssize_t
e1ea2351
GKH		 387provisioning_mode_show(struct device *dev, struct device_attribute *attr,
388 char *buf)
c98a0eb0
MP		 389{
390 struct scsi_disk *sdkp = to_scsi_disk(dev);
391
4c11712a 392 return sprintf(buf, "%s\n", lbp_mode[sdkp->provisioning_mode]);
c98a0eb0
MP		 393}
394
395static ssize_t
e1ea2351
GKH		 396provisioning_mode_store(struct device *dev, struct device_attribute *attr,
397 const char *buf, size_t count)
c98a0eb0
MP		 398{
399 struct scsi_disk *sdkp = to_scsi_disk(dev);
400 struct scsi_device *sdp = sdkp->device;
4c11712a 401 int mode;
c98a0eb0
MP		 402
403 if (!capable(CAP_SYS_ADMIN))
404 return -EACCES;
405
89d94756
HR		 406 if (sd_is_zoned(sdkp)) {
407 sd_config_discard(sdkp, SD_LBP_DISABLE);
408 return count;
409 }
410
c98a0eb0
MP		 411 if (sdp->type != TYPE_DISK)
412 return -EINVAL;
413
4c11712a
MP		 414 mode = sysfs_match_string(lbp_mode, buf);
415 if (mode < 0)
c98a0eb0
MP		 416 return -EINVAL;
417
4c11712a
MP		 418 sd_config_discard(sdkp, mode);
419
c98a0eb0 420 return count;
e339c1a7 421}
e1ea2351 422static DEVICE_ATTR_RW(provisioning_mode);
e339c1a7 423
4c11712a 424/* sysfs_match_string() requires dense arrays */
e6bd9312
MP		 425static const char *zeroing_mode[] = {
426 [SD_ZERO_WRITE] = "write",
427 [SD_ZERO_WS] = "writesame",
428 [SD_ZERO_WS16_UNMAP] = "writesame_16_unmap",
429 [SD_ZERO_WS10_UNMAP] = "writesame_10_unmap",
430};
431
432static ssize_t
433zeroing_mode_show(struct device *dev, struct device_attribute *attr,
434 char *buf)
435{
436 struct scsi_disk *sdkp = to_scsi_disk(dev);
437
4c11712a 438 return sprintf(buf, "%s\n", zeroing_mode[sdkp->zeroing_mode]);
e6bd9312
MP		 439}
440
441static ssize_t
442zeroing_mode_store(struct device *dev, struct device_attribute *attr,
443 const char *buf, size_t count)
444{
445 struct scsi_disk *sdkp = to_scsi_disk(dev);
4c11712a 446 int mode;
e6bd9312
MP		 447
448 if (!capable(CAP_SYS_ADMIN))
449 return -EACCES;
450
4c11712a
MP		 451 mode = sysfs_match_string(zeroing_mode, buf);
452 if (mode < 0)
e6bd9312
MP		 453 return -EINVAL;
454
4c11712a
MP		 455 sdkp->zeroing_mode = mode;
456
e6bd9312
MP		 457 return count;
458}
459static DEVICE_ATTR_RW(zeroing_mode);
460
18a4d0a2 461static ssize_t
e1ea2351
GKH		 462max_medium_access_timeouts_show(struct device *dev,
463 struct device_attribute *attr, char *buf)
18a4d0a2
MP		 464{
465 struct scsi_disk *sdkp = to_scsi_disk(dev);
466
4c11712a 467 return sprintf(buf, "%u\n", sdkp->max_medium_access_timeouts);
18a4d0a2
MP		 468}
469
470static ssize_t
e1ea2351
GKH		 471max_medium_access_timeouts_store(struct device *dev,
472 struct device_attribute *attr, const char *buf,
473 size_t count)
18a4d0a2
MP		 474{
475 struct scsi_disk *sdkp = to_scsi_disk(dev);
476 int err;
477
478 if (!capable(CAP_SYS_ADMIN))
479 return -EACCES;
480
481 err = kstrtouint(buf, 10, &sdkp->max_medium_access_timeouts);
482
483 return err ? err : count;
484}
e1ea2351 485static DEVICE_ATTR_RW(max_medium_access_timeouts);
18a4d0a2 486
5db44863 487static ssize_t
e1ea2351
GKH		 488max_write_same_blocks_show(struct device *dev, struct device_attribute *attr,
489 char *buf)
5db44863
MP		 490{
491 struct scsi_disk *sdkp = to_scsi_disk(dev);
492
4c11712a 493 return sprintf(buf, "%u\n", sdkp->max_ws_blocks);
5db44863
MP		 494}
495
496static ssize_t
e1ea2351
GKH		 497max_write_same_blocks_store(struct device *dev, struct device_attribute *attr,
498 const char *buf, size_t count)
5db44863
MP		 499{
500 struct scsi_disk *sdkp = to_scsi_disk(dev);
501 struct scsi_device *sdp = sdkp->device;
502 unsigned long max;
503 int err;
504
505 if (!capable(CAP_SYS_ADMIN))
506 return -EACCES;
507
89d94756 508 if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC)
5db44863
MP		 509 return -EINVAL;
510
511 err = kstrtoul(buf, 10, &max);
512
513 if (err)
514 return err;
515
516 if (max == 0)
517 sdp->no_write_same = 1;
66c28f97
MP		 518 else if (max <= SD_MAX_WS16_BLOCKS) {
519 sdp->no_write_same = 0;
5db44863 520 sdkp->max_ws_blocks = max;
66c28f97 521 }
5db44863
MP		 522
523 sd_config_write_same(sdkp);
524
525 return count;
526}
e1ea2351
GKH		 527static DEVICE_ATTR_RW(max_write_same_blocks);
528
c5f88522
DLM		 529static ssize_t
530zoned_cap_show(struct device *dev, struct device_attribute *attr, char *buf)
531{
532 struct scsi_disk *sdkp = to_scsi_disk(dev);
533
534 if (sdkp->device->type == TYPE_ZBC)
535 return sprintf(buf, "host-managed\n");
536 if (sdkp->zoned == 1)
537 return sprintf(buf, "host-aware\n");
538 if (sdkp->zoned == 2)
539 return sprintf(buf, "drive-managed\n");
540 return sprintf(buf, "none\n");
541}
542static DEVICE_ATTR_RO(zoned_cap);
543
0610959f
MC		 544static ssize_t
545max_retries_store(struct device *dev, struct device_attribute *attr,
546 const char *buf, size_t count)
547{
548 struct scsi_disk *sdkp = to_scsi_disk(dev);
549 struct scsi_device *sdev = sdkp->device;
550 int retries, err;
551
552 err = kstrtoint(buf, 10, &retries);
553 if (err)
554 return err;
555
556 if (retries == SCSI_CMD_RETRIES_NO_LIMIT || retries <= SD_MAX_RETRIES) {
557 sdkp->max_retries = retries;
558 return count;
559 }
560
561 sdev_printk(KERN_ERR, sdev, "max_retries must be between -1 and %d\n",
562 SD_MAX_RETRIES);
563 return -EINVAL;
564}
565
566static ssize_t
567max_retries_show(struct device *dev, struct device_attribute *attr,
568 char *buf)
569{
570 struct scsi_disk *sdkp = to_scsi_disk(dev);
571
572 return sprintf(buf, "%d\n", sdkp->max_retries);
573}
574
575static DEVICE_ATTR_RW(max_retries);
576
e1ea2351
GKH		 577static struct attribute *sd_disk_attrs[] = {
578 &dev_attr_cache_type.attr,
579 &dev_attr_FUA.attr,
580 &dev_attr_allow_restart.attr,
581 &dev_attr_manage_start_stop.attr,
582 &dev_attr_protection_type.attr,
583 &dev_attr_protection_mode.attr,
584 &dev_attr_app_tag_own.attr,
585 &dev_attr_thin_provisioning.attr,
586 &dev_attr_provisioning_mode.attr,
e6bd9312 587 &dev_attr_zeroing_mode.attr,
e1ea2351
GKH		 588 &dev_attr_max_write_same_blocks.attr,
589 &dev_attr_max_medium_access_timeouts.attr,
c5f88522 590 &dev_attr_zoned_cap.attr,
0610959f 591 &dev_attr_max_retries.attr,
e1ea2351 592 NULL,
6bdaa1f1 593};
e1ea2351 594ATTRIBUTE_GROUPS(sd_disk);
6bdaa1f1
JB		 595
596static struct class sd_disk_class = {
597 .name = "scsi_disk",
598 .owner = THIS_MODULE,
ee959b00 599 .dev_release = scsi_disk_release,
e1ea2351 600 .dev_groups = sd_disk_groups,
6bdaa1f1 601};
1da177e4 602
691e3d31 603static const struct dev_pm_ops sd_pm_ops = {
95897910 604 .suspend = sd_suspend_system,
1c957532 605 .resume = sd_resume_system,
95897910 606 .poweroff = sd_suspend_system,
1c957532 607 .restore = sd_resume_system,
95897910 608 .runtime_suspend = sd_suspend_runtime,
ed4246d3 609 .runtime_resume = sd_resume_runtime,
691e3d31
AL		 610};
611
1da177e4 612static struct scsi_driver sd_template = {
1da177e4
LT		 613 .gendrv = {
614 .name = "sd",
3af6b352 615 .owner = THIS_MODULE,
1da177e4 616 .probe = sd_probe,
f049cf1a 617 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
1da177e4
LT		 618 .remove = sd_remove,
619 .shutdown = sd_shutdown,
691e3d31 620 .pm = &sd_pm_ops,
1da177e4
LT		 621 },
622 .rescan = sd_rescan,
a1b73fc1
CH		 623 .init_command = sd_init_command,
624 .uninit_command = sd_uninit_command,
7b3d9545 625 .done = sd_done,
18a4d0a2 626 .eh_action = sd_eh_action,
7a38dc0b 627 .eh_reset = sd_eh_reset,
1da177e4
LT		 628};
629
0761df9c 630/*
996e509b
CH		 631 * Don't request a new module, as that could deadlock in multipath
632 * environment.
0761df9c 633 */
996e509b 634static void sd_default_probe(dev_t devt)
0761df9c 635{
0761df9c
HR		 636}
637
1da177e4
LT		 638/*
639 * Device no to disk mapping:
640 *
641 * major disc2 disc p1
642 * |............|.............|....|....| <- dev_t
643 * 31 20 19 8 7 4 3 0
644 *
645 * Inside a major, we have 16k disks, however mapped non-
646 * contiguously. The first 16 disks are for major0, the next
647 * ones with major1, ... Disk 256 is for major0 again, disk 272
648 * for major1, ...
649 * As we stay compatible with our numbering scheme, we can reuse
650 * the well-know SCSI majors 8, 65--71, 136--143.
651 */
652static int sd_major(int major_idx)
653{
654 switch (major_idx) {
655 case 0:
656 return SCSI_DISK0_MAJOR;
657 case 1 ... 7:
658 return SCSI_DISK1_MAJOR + major_idx - 1;
659 case 8 ... 15:
660 return SCSI_DISK8_MAJOR + major_idx - 8;
661 default:
662 BUG();
663 return 0; /* shut up gcc */
664 }
665}
666
3d9a1f53 667static struct scsi_disk *scsi_disk_get(struct gendisk *disk)
1da177e4
LT		 668{
669 struct scsi_disk *sdkp = NULL;
670
3d9a1f53
CH		 671 mutex_lock(&sd_ref_mutex);
672
39b7f1e2
AS		 673 if (disk->private_data) {
674 sdkp = scsi_disk(disk);
675 if (scsi_device_get(sdkp->device) == 0)
ee959b00 676 get_device(&sdkp->dev);
39b7f1e2
AS		 677 else
678 sdkp = NULL;
679 }
0b950672 680 mutex_unlock(&sd_ref_mutex);
1da177e4
LT		 681 return sdkp;
682}
683
684static void scsi_disk_put(struct scsi_disk *sdkp)
685{
686 struct scsi_device *sdev = sdkp->device;
687
0b950672 688 mutex_lock(&sd_ref_mutex);
ee959b00 689 put_device(&sdkp->dev);
1da177e4 690 scsi_device_put(sdev);
0b950672 691 mutex_unlock(&sd_ref_mutex);
1da177e4
LT		 692}
693
d80210f2
CH		 694#ifdef CONFIG_BLK_SED_OPAL
695static int sd_sec_submit(void *data, u16 spsp, u8 secp, void *buffer,
696 size_t len, bool send)
697{
0610959f
MC		 698 struct scsi_disk *sdkp = data;
699 struct scsi_device *sdev = sdkp->device;
d80210f2
CH		 700 u8 cdb[12] = { 0, };
701 int ret;
702
703 cdb[0] = send ? SECURITY_PROTOCOL_OUT : SECURITY_PROTOCOL_IN;
704 cdb[1] = secp;
705 put_unaligned_be16(spsp, &cdb[2]);
706 put_unaligned_be32(len, &cdb[6]);
707
aaf15f8c
BVA		 708 ret = scsi_execute(sdev, cdb, send ? DMA_TO_DEVICE : DMA_FROM_DEVICE,
709 buffer, len, NULL, NULL, SD_TIMEOUT, sdkp->max_retries, 0,
710 RQF_PM, NULL);
d80210f2
CH		 711 return ret <= 0 ? ret : -EIO;
712}
713#endif /* CONFIG_BLK_SED_OPAL */
714
082c2cd2
JG		 715/*
716 * Look up the DIX operation based on whether the command is read or
717 * write and whether dix and dif are enabled.
718 */
719static unsigned int sd_prot_op(bool write, bool dix, bool dif)
720{
721 /* Lookup table: bit 2 (write), bit 1 (dix), bit 0 (dif) */
722 static const unsigned int ops[] = { /* wrt dix dif */
723 SCSI_PROT_NORMAL, /* 0 0 0 */
724 SCSI_PROT_READ_STRIP, /* 0 0 1 */
725 SCSI_PROT_READ_INSERT, /* 0 1 0 */
726 SCSI_PROT_READ_PASS, /* 0 1 1 */
727 SCSI_PROT_NORMAL, /* 1 0 0 */
728 SCSI_PROT_WRITE_INSERT, /* 1 0 1 */
729 SCSI_PROT_WRITE_STRIP, /* 1 1 0 */
730 SCSI_PROT_WRITE_PASS, /* 1 1 1 */
731 };
732
733 return ops[write << 2 | dix << 1 | dif];
734}
735
736/*
737 * Returns a mask of the protection flags that are valid for a given DIX
738 * operation.
739 */
740static unsigned int sd_prot_flag_mask(unsigned int prot_op)
741{
742 static const unsigned int flag_mask[] = {
743 [SCSI_PROT_NORMAL] = 0,
744
745 [SCSI_PROT_READ_STRIP] = SCSI_PROT_TRANSFER_PI |
746 SCSI_PROT_GUARD_CHECK |
747 SCSI_PROT_REF_CHECK |
748 SCSI_PROT_REF_INCREMENT,
749
750 [SCSI_PROT_READ_INSERT] = SCSI_PROT_REF_INCREMENT |
751 SCSI_PROT_IP_CHECKSUM,
752
753 [SCSI_PROT_READ_PASS] = SCSI_PROT_TRANSFER_PI |
754 SCSI_PROT_GUARD_CHECK |
755 SCSI_PROT_REF_CHECK |
756 SCSI_PROT_REF_INCREMENT |
757 SCSI_PROT_IP_CHECKSUM,
758
759 [SCSI_PROT_WRITE_INSERT] = SCSI_PROT_TRANSFER_PI |
760 SCSI_PROT_REF_INCREMENT,
761
762 [SCSI_PROT_WRITE_STRIP] = SCSI_PROT_GUARD_CHECK |
763 SCSI_PROT_REF_CHECK |
764 SCSI_PROT_REF_INCREMENT |
765 SCSI_PROT_IP_CHECKSUM,
766
767 [SCSI_PROT_WRITE_PASS] = SCSI_PROT_TRANSFER_PI |
768 SCSI_PROT_GUARD_CHECK |
769 SCSI_PROT_REF_CHECK |
770 SCSI_PROT_REF_INCREMENT |
771 SCSI_PROT_IP_CHECKSUM,
772 };
773
774 return flag_mask[prot_op];
775}
776
c611529e
MP		 777static unsigned char sd_setup_protect_cmnd(struct scsi_cmnd *scmd,
778 unsigned int dix, unsigned int dif)
35e1a5d9 779{
5999ccff
BVA		 780 struct request *rq = scsi_cmd_to_rq(scmd);
781 struct bio *bio = rq->bio;
782 unsigned int prot_op = sd_prot_op(rq_data_dir(rq), dix, dif);
c611529e
MP		 783 unsigned int protect = 0;
784
785 if (dix) { /* DIX Type 0, 1, 2, 3 */
786 if (bio_integrity_flagged(bio, BIP_IP_CHECKSUM))
787 scmd->prot_flags |= SCSI_PROT_IP_CHECKSUM;
788
789 if (bio_integrity_flagged(bio, BIP_CTRL_NOCHECK) == false)
790 scmd->prot_flags |= SCSI_PROT_GUARD_CHECK;
791 }
792
8475c811 793 if (dif != T10_PI_TYPE3_PROTECTION) { /* DIX/DIF Type 0, 1, 2 */
c611529e
MP		 794 scmd->prot_flags |= SCSI_PROT_REF_INCREMENT;
795
796 if (bio_integrity_flagged(bio, BIP_CTRL_NOCHECK) == false)
797 scmd->prot_flags |= SCSI_PROT_REF_CHECK;
798 }
799
800 if (dif) { /* DIX/DIF Type 1, 2, 3 */
801 scmd->prot_flags |= SCSI_PROT_TRANSFER_PI;
802
803 if (bio_integrity_flagged(bio, BIP_DISK_NOCHECK))
804 protect = 3 << 5; /* Disable target PI checking */
805 else
806 protect = 1 << 5; /* Enable target PI checking */
35e1a5d9
MP		 807 }
808
809 scsi_set_prot_op(scmd, prot_op);
810 scsi_set_prot_type(scmd, dif);
c611529e
MP		 811 scmd->prot_flags &= sd_prot_flag_mask(prot_op);
812
813 return protect;
35e1a5d9
MP		 814}
815
c98a0eb0
MP		 816static void sd_config_discard(struct scsi_disk *sdkp, unsigned int mode)
817{
818 struct request_queue *q = sdkp->disk->queue;
819 unsigned int logical_block_size = sdkp->device->sector_size;
820 unsigned int max_blocks = 0;
821
bcd069bb
MP		 822 q->limits.discard_alignment =
823 sdkp->unmap_alignment * logical_block_size;
824 q->limits.discard_granularity =
825 max(sdkp->physical_block_size,
826 sdkp->unmap_granularity * logical_block_size);
89730393
MP		 827 sdkp->provisioning_mode = mode;
828
c98a0eb0
MP		 829 switch (mode) {
830
4c11712a 831 case SD_LBP_FULL:
c98a0eb0 832 case SD_LBP_DISABLE:
2bb4cd5c 833 blk_queue_max_discard_sectors(q, 0);
8b904b5b 834 blk_queue_flag_clear(QUEUE_FLAG_DISCARD, q);
c98a0eb0
MP		 835 return;
836
837 case SD_LBP_UNMAP:
5db44863
MP		 838 max_blocks = min_not_zero(sdkp->max_unmap_blocks,
839 (u32)SD_MAX_WS16_BLOCKS);
c98a0eb0
MP		 840 break;
841
842 case SD_LBP_WS16:
28a0bc41
MP		 843 if (sdkp->device->unmap_limit_for_ws)
844 max_blocks = sdkp->max_unmap_blocks;
845 else
846 max_blocks = sdkp->max_ws_blocks;
847
848 max_blocks = min_not_zero(max_blocks, (u32)SD_MAX_WS16_BLOCKS);
c98a0eb0
MP		 849 break;
850
851 case SD_LBP_WS10:
28a0bc41
MP		 852 if (sdkp->device->unmap_limit_for_ws)
853 max_blocks = sdkp->max_unmap_blocks;
854 else
855 max_blocks = sdkp->max_ws_blocks;
856
857 max_blocks = min_not_zero(max_blocks, (u32)SD_MAX_WS10_BLOCKS);
c98a0eb0
MP		 858 break;
859
860 case SD_LBP_ZERO:
5db44863
MP		 861 max_blocks = min_not_zero(sdkp->max_ws_blocks,
862 (u32)SD_MAX_WS10_BLOCKS);
c98a0eb0
MP		 863 break;
864 }
865
2bb4cd5c 866 blk_queue_max_discard_sectors(q, max_blocks * (logical_block_size >> 9));
8b904b5b 867 blk_queue_flag_set(QUEUE_FLAG_DISCARD, q);
c98a0eb0
MP		 868}
869
159b2cbf 870static blk_status_t sd_setup_unmap_cmnd(struct scsi_cmnd *cmd)
e339c1a7 871{
6a7b4398 872 struct scsi_device *sdp = cmd->device;
5999ccff 873 struct request *rq = scsi_cmd_to_rq(cmd);
f3fa33ac 874 struct scsi_disk *sdkp = scsi_disk(rq->q->disk);
c6c93fdd
MP		 875 u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq));
876 u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq));
81d926e8 877 unsigned int data_len = 24;
c98a0eb0 878 char *buf;
e339c1a7 879
61cce6f6 880 rq->special_vec.bv_page = mempool_alloc(sd_page_pool, GFP_ATOMIC);
81d926e8 881 if (!rq->special_vec.bv_page)
159b2cbf 882 return BLK_STS_RESOURCE;
61cce6f6 883 clear_highpage(rq->special_vec.bv_page);
81d926e8
CH		 884 rq->special_vec.bv_offset = 0;
885 rq->special_vec.bv_len = data_len;
886 rq->rq_flags |= RQF_SPECIAL_PAYLOAD;
66ac0280 887
81d926e8
CH		 888 cmd->cmd_len = 10;
889 cmd->cmnd[0] = UNMAP;
890 cmd->cmnd[8] = 24;
e339c1a7 891
c3c77056 892 buf = bvec_virt(&rq->special_vec);
81d926e8
CH		 893 put_unaligned_be16(6 + 16, &buf[0]);
894 put_unaligned_be16(16, &buf[2]);
c6c93fdd
MP		 895 put_unaligned_be64(lba, &buf[8]);
896 put_unaligned_be32(nr_blocks, &buf[16]);
e339c1a7 897
0610959f 898 cmd->allowed = sdkp->max_retries;
81d926e8
CH		 899 cmd->transfersize = data_len;
900 rq->timeout = SD_TIMEOUT;
e339c1a7 901
7007e9dd 902 return scsi_alloc_sgtables(cmd);
81d926e8 903}
c98a0eb0 904
159b2cbf
CH		 905static blk_status_t sd_setup_write_same16_cmnd(struct scsi_cmnd *cmd,
906 bool unmap)
81d926e8
CH		 907{
908 struct scsi_device *sdp = cmd->device;
5999ccff 909 struct request *rq = scsi_cmd_to_rq(cmd);
f3fa33ac 910 struct scsi_disk *sdkp = scsi_disk(rq->q->disk);
c6c93fdd
MP		 911 u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq));
912 u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq));
81d926e8 913 u32 data_len = sdp->sector_size;
c98a0eb0 914
61cce6f6 915 rq->special_vec.bv_page = mempool_alloc(sd_page_pool, GFP_ATOMIC);
81d926e8 916 if (!rq->special_vec.bv_page)
159b2cbf 917 return BLK_STS_RESOURCE;
61cce6f6 918 clear_highpage(rq->special_vec.bv_page);
81d926e8
CH		 919 rq->special_vec.bv_offset = 0;
920 rq->special_vec.bv_len = data_len;
921 rq->rq_flags |= RQF_SPECIAL_PAYLOAD;
c98a0eb0 922
81d926e8
CH		 923 cmd->cmd_len = 16;
924 cmd->cmnd[0] = WRITE_SAME_16;
02d26103 925 if (unmap)
6a7b4398 926 cmd->cmnd[1] = 0x8; /* UNMAP */
c6c93fdd
MP		 927 put_unaligned_be64(lba, &cmd->cmnd[2]);
928 put_unaligned_be32(nr_blocks, &cmd->cmnd[10]);
66ac0280 929
0610959f 930 cmd->allowed = sdkp->max_retries;
81d926e8 931 cmd->transfersize = data_len;
02d26103 932 rq->timeout = unmap ? SD_TIMEOUT : SD_WRITE_SAME_TIMEOUT;
c98a0eb0 933
7007e9dd 934 return scsi_alloc_sgtables(cmd);
81d926e8 935}
c98a0eb0 936
159b2cbf
CH		 937static blk_status_t sd_setup_write_same10_cmnd(struct scsi_cmnd *cmd,
938 bool unmap)
81d926e8
CH		 939{
940 struct scsi_device *sdp = cmd->device;
5999ccff 941 struct request *rq = scsi_cmd_to_rq(cmd);
f3fa33ac 942 struct scsi_disk *sdkp = scsi_disk(rq->q->disk);
c6c93fdd
MP		 943 u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq));
944 u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq));
81d926e8 945 u32 data_len = sdp->sector_size;
c98a0eb0 946
61cce6f6 947 rq->special_vec.bv_page = mempool_alloc(sd_page_pool, GFP_ATOMIC);
81d926e8 948 if (!rq->special_vec.bv_page)
159b2cbf 949 return BLK_STS_RESOURCE;
61cce6f6 950 clear_highpage(rq->special_vec.bv_page);
81d926e8
CH		 951 rq->special_vec.bv_offset = 0;
952 rq->special_vec.bv_len = data_len;
f9d03f96 953 rq->rq_flags |= RQF_SPECIAL_PAYLOAD;
e339c1a7 954
81d926e8
CH		 955 cmd->cmd_len = 10;
956 cmd->cmnd[0] = WRITE_SAME;
957 if (unmap)
958 cmd->cmnd[1] = 0x8; /* UNMAP */
c6c93fdd
MP		 959 put_unaligned_be32(lba, &cmd->cmnd[2]);
960 put_unaligned_be16(nr_blocks, &cmd->cmnd[7]);
6a7b4398 961
0610959f 962 cmd->allowed = sdkp->max_retries;
81d926e8 963 cmd->transfersize = data_len;
02d26103 964 rq->timeout = unmap ? SD_TIMEOUT : SD_WRITE_SAME_TIMEOUT;
6a7b4398 965
7007e9dd 966 return scsi_alloc_sgtables(cmd);
f1126e95 967}
f9d03f96 968
159b2cbf 969static blk_status_t sd_setup_write_zeroes_cmnd(struct scsi_cmnd *cmd)
02d26103 970{
5999ccff 971 struct request *rq = scsi_cmd_to_rq(cmd);
02d26103 972 struct scsi_device *sdp = cmd->device;
f3fa33ac 973 struct scsi_disk *sdkp = scsi_disk(rq->q->disk);
c6c93fdd
MP		 974 u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq));
975 u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq));
02d26103 976
e4b87837 977 if (!(rq->cmd_flags & REQ_NOUNMAP)) {
e6bd9312
MP		 978 switch (sdkp->zeroing_mode) {
979 case SD_ZERO_WS16_UNMAP:
39051dd8 980 return sd_setup_write_same16_cmnd(cmd, true);
e6bd9312 981 case SD_ZERO_WS10_UNMAP:
39051dd8 982 return sd_setup_write_same10_cmnd(cmd, true);
e4b87837
CH		 983 }
984 }
c98a0eb0 985
e5cc9002
EM		 986 if (sdp->no_write_same) {
987 rq->rq_flags |= RQF_QUIET;
159b2cbf 988 return BLK_STS_TARGET;
e5cc9002 989 }
ed44fd7f 990
c6c93fdd 991 if (sdkp->ws16 || lba > 0xffffffff || nr_blocks > 0xffff)
39051dd8 992 return sd_setup_write_same16_cmnd(cmd, false);
ed44fd7f 993
39051dd8 994 return sd_setup_write_same10_cmnd(cmd, false);
f1126e95
FT		 995}
996
5db44863
MP		 997static void sd_config_write_same(struct scsi_disk *sdkp)
998{
999 struct request_queue *q = sdkp->disk->queue;
1000 unsigned int logical_block_size = sdkp->device->sector_size;
5db44863
MP		 1001
1002 if (sdkp->device->no_write_same) {
1003 sdkp->max_ws_blocks = 0;
1004 goto out;
1005 }
1006
1007 /* Some devices can not handle block counts above 0xffff despite
1008 * supporting WRITE SAME(16). Consequently we default to 64k
1009 * blocks per I/O unless the device explicitly advertises a
1010 * bigger limit.
1011 */
66c28f97
MP		 1012 if (sdkp->max_ws_blocks > SD_MAX_WS10_BLOCKS)
1013 sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks,
1014 (u32)SD_MAX_WS16_BLOCKS);
1015 else if (sdkp->ws16 || sdkp->ws10 || sdkp->device->no_report_opcodes)
1016 sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks,
1017 (u32)SD_MAX_WS10_BLOCKS);
1018 else {
1019 sdkp->device->no_write_same = 1;
1020 sdkp->max_ws_blocks = 0;
1021 }
5db44863 1022
e6bd9312
MP		 1023 if (sdkp->lbprz && sdkp->lbpws)
1024 sdkp->zeroing_mode = SD_ZERO_WS16_UNMAP;
1025 else if (sdkp->lbprz && sdkp->lbpws10)
1026 sdkp->zeroing_mode = SD_ZERO_WS10_UNMAP;
1027 else if (sdkp->max_ws_blocks)
1028 sdkp->zeroing_mode = SD_ZERO_WS;
1029 else
1030 sdkp->zeroing_mode = SD_ZERO_WRITE;
1031
b7af62a9
DLM		 1032 if (sdkp->max_ws_blocks &&
1033 sdkp->physical_block_size > logical_block_size) {
1034 /*
1035 * Reporting a maximum number of blocks that is not aligned
1036 * on the device physical size would cause a large write same
1037 * request to be split into physically unaligned chunks by
1038 * __blkdev_issue_write_zeroes() and __blkdev_issue_write_same()
1039 * even if the caller of these functions took care to align the
1040 * large request. So make sure the maximum reported is aligned
1041 * to the device physical block size. This is only an optional
1042 * optimization for regular disks, but this is mandatory to
1043 * avoid failure of large write same requests directed at
1044 * sequential write required zones of host-managed ZBC disks.
1045 */
1046 sdkp->max_ws_blocks =
1047 round_down(sdkp->max_ws_blocks,
1048 bytes_to_logical(sdkp->device,
1049 sdkp->physical_block_size));
1050 }
1051
5db44863 1052out:
66c28f97
MP		 1053 blk_queue_max_write_same_sectors(q, sdkp->max_ws_blocks *
1054 (logical_block_size >> 9));
02d26103
CH		 1055 blk_queue_max_write_zeroes_sectors(q, sdkp->max_ws_blocks *
1056 (logical_block_size >> 9));
5db44863
MP		 1057}
1058
1059/**
1060 * sd_setup_write_same_cmnd - write the same data to multiple blocks
59b1134c 1061 * @cmd: command to prepare
5db44863 1062 *
7529fbb0
DLM		 1063 * Will set up either WRITE SAME(10) or WRITE SAME(16) depending on
1064 * the preference indicated by the target device.
5db44863 1065 **/
159b2cbf 1066static blk_status_t sd_setup_write_same_cmnd(struct scsi_cmnd *cmd)
5db44863 1067{
5999ccff 1068 struct request *rq = scsi_cmd_to_rq(cmd);
59b1134c 1069 struct scsi_device *sdp = cmd->device;
f3fa33ac 1070 struct scsi_disk *sdkp = scsi_disk(rq->q->disk);
5db44863 1071 struct bio *bio = rq->bio;
c6c93fdd
MP		 1072 u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq));
1073 u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq));
159b2cbf 1074 blk_status_t ret;
5db44863
MP		 1075
1076 if (sdkp->device->no_write_same)
159b2cbf 1077 return BLK_STS_TARGET;
5db44863 1078
a4ad39b1 1079 BUG_ON(bio_offset(bio) || bio_iovec(bio).bv_len != sdp->sector_size);
5db44863 1080
5db44863 1081 rq->timeout = SD_WRITE_SAME_TIMEOUT;
5db44863 1082
c6c93fdd 1083 if (sdkp->ws16 || lba > 0xffffffff || nr_blocks > 0xffff) {
59b1134c
CH		 1084 cmd->cmd_len = 16;
1085 cmd->cmnd[0] = WRITE_SAME_16;
c6c93fdd
MP		 1086 put_unaligned_be64(lba, &cmd->cmnd[2]);
1087 put_unaligned_be32(nr_blocks, &cmd->cmnd[10]);
5db44863 1088 } else {
59b1134c
CH		 1089 cmd->cmd_len = 10;
1090 cmd->cmnd[0] = WRITE_SAME;
c6c93fdd
MP		 1091 put_unaligned_be32(lba, &cmd->cmnd[2]);
1092 put_unaligned_be16(nr_blocks, &cmd->cmnd[7]);
5db44863
MP		 1093 }
1094
59b1134c 1095 cmd->transfersize = sdp->sector_size;
0610959f 1096 cmd->allowed = sdkp->max_retries;
08965c2e
BVA		 1097
1098 /*
1099 * For WRITE SAME the data transferred via the DATA OUT buffer is
1100 * different from the amount of data actually written to the target.
1101 *
1102 * We set up __data_len to the amount of data transferred via the
1103 * DATA OUT buffer so that blk_rq_map_sg sets up the proper S/G list
1104 * to transfer a single sector of data first, but then reset it to
1105 * the amount of data to be written right after so that the I/O path
1106 * knows how much to actually write.
1107 */
1108 rq->__data_len = sdp->sector_size;
7007e9dd 1109 ret = scsi_alloc_sgtables(cmd);
84f7a9de 1110 rq->__data_len = blk_rq_bytes(rq);
29f6ca69 1111
08965c2e 1112 return ret;
5db44863
MP		 1113}
1114
159b2cbf 1115static blk_status_t sd_setup_flush_cmnd(struct scsi_cmnd *cmd)
90467c29 1116{
5999ccff 1117 struct request *rq = scsi_cmd_to_rq(cmd);
f3fa33ac 1118 struct scsi_disk *sdkp = scsi_disk(rq->q->disk);
a118c6c1
CH		 1119
1120 /* flush requests don't perform I/O, zero the S/G table */
1121 memset(&cmd->sdb, 0, sizeof(cmd->sdb));
90467c29 1122
a118c6c1
CH		 1123 cmd->cmnd[0] = SYNCHRONIZE_CACHE;
1124 cmd->cmd_len = 10;
1125 cmd->transfersize = 0;
0610959f 1126 cmd->allowed = sdkp->max_retries;
a118c6c1 1127
26b9fd8b 1128 rq->timeout = rq->q->rq_timeout * SD_FLUSH_TIMEOUT_MULTIPLIER;
159b2cbf 1129 return BLK_STS_OK;
90467c29
FT		 1130}
1131
78a02f49
MP		 1132static blk_status_t sd_setup_rw32_cmnd(struct scsi_cmnd *cmd, bool write,
1133 sector_t lba, unsigned int nr_blocks,
1134 unsigned char flags)
1da177e4 1135{
78a02f49
MP		 1136 cmd->cmnd = mempool_alloc(sd_cdb_pool, GFP_ATOMIC);
1137 if (unlikely(cmd->cmnd == NULL))
1138 return BLK_STS_RESOURCE;
1139
1140 cmd->cmd_len = SD_EXT_CDB_SIZE;
1141 memset(cmd->cmnd, 0, cmd->cmd_len);
1142
1143 cmd->cmnd[0] = VARIABLE_LENGTH_CMD;
1144 cmd->cmnd[7] = 0x18; /* Additional CDB len */
1145 cmd->cmnd[9] = write ? WRITE_32 : READ_32;
1146 cmd->cmnd[10] = flags;
1147 put_unaligned_be64(lba, &cmd->cmnd[12]);
1148 put_unaligned_be32(lba, &cmd->cmnd[20]); /* Expected Indirect LBA */
1149 put_unaligned_be32(nr_blocks, &cmd->cmnd[28]);
1150
1151 return BLK_STS_OK;
1152}
1153
1154static blk_status_t sd_setup_rw16_cmnd(struct scsi_cmnd *cmd, bool write,
1155 sector_t lba, unsigned int nr_blocks,
1156 unsigned char flags)
1157{
1158 cmd->cmd_len = 16;
1159 cmd->cmnd[0] = write ? WRITE_16 : READ_16;
1160 cmd->cmnd[1] = flags;
1161 cmd->cmnd[14] = 0;
1162 cmd->cmnd[15] = 0;
1163 put_unaligned_be64(lba, &cmd->cmnd[2]);
1164 put_unaligned_be32(nr_blocks, &cmd->cmnd[10]);
1165
1166 return BLK_STS_OK;
1167}
1168
1169static blk_status_t sd_setup_rw10_cmnd(struct scsi_cmnd *cmd, bool write,
1170 sector_t lba, unsigned int nr_blocks,
1171 unsigned char flags)
1172{
1173 cmd->cmd_len = 10;
1174 cmd->cmnd[0] = write ? WRITE_10 : READ_10;
1175 cmd->cmnd[1] = flags;
1176 cmd->cmnd[6] = 0;
1177 cmd->cmnd[9] = 0;
1178 put_unaligned_be32(lba, &cmd->cmnd[2]);
1179 put_unaligned_be16(nr_blocks, &cmd->cmnd[7]);
1180
1181 return BLK_STS_OK;
1182}
1183
1184static blk_status_t sd_setup_rw6_cmnd(struct scsi_cmnd *cmd, bool write,
1185 sector_t lba, unsigned int nr_blocks,
1186 unsigned char flags)
1187{
db5db4b9
BVA		 1188 /* Avoid that 0 blocks gets translated into 256 blocks. */
1189 if (WARN_ON_ONCE(nr_blocks == 0))
1190 return BLK_STS_IOERR;
1191
78a02f49
MP		 1192 if (unlikely(flags & 0x8)) {
1193 /*
1194 * This happens only if this drive failed 10byte rw
1195 * command with ILLEGAL_REQUEST during operation and
1196 * thus turned off use_10_for_rw.
1197 */
1198 scmd_printk(KERN_ERR, cmd, "FUA write on READ/WRITE(6) drive\n");
1199 return BLK_STS_IOERR;
1200 }
1201
1202 cmd->cmd_len = 6;
1203 cmd->cmnd[0] = write ? WRITE_6 : READ_6;
1204 cmd->cmnd[1] = (lba >> 16) & 0x1f;
1205 cmd->cmnd[2] = (lba >> 8) & 0xff;
1206 cmd->cmnd[3] = lba & 0xff;
1207 cmd->cmnd[4] = nr_blocks;
1208 cmd->cmnd[5] = 0;
1209
1210 return BLK_STS_OK;
1211}
1212
cf64e5a5 1213static blk_status_t sd_setup_read_write_cmnd(struct scsi_cmnd *cmd)
1da177e4 1214{
5999ccff 1215 struct request *rq = scsi_cmd_to_rq(cmd);
cf64e5a5 1216 struct scsi_device *sdp = cmd->device;
f3fa33ac 1217 struct scsi_disk *sdkp = scsi_disk(rq->q->disk);
ec029758 1218 sector_t lba = sectors_to_logical(sdp, blk_rq_pos(rq));
18351070 1219 sector_t threshold;
ec029758 1220 unsigned int nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq));
ec029758 1221 unsigned int mask = logical_to_sectors(sdp, 1) - 1;
78a02f49
MP		 1222 bool write = rq_data_dir(rq) == WRITE;
1223 unsigned char protect, fua;
159b2cbf 1224 blk_status_t ret;
0cf9f4e5
XC		 1225 unsigned int dif;
1226 bool dix;
7f9a6bc4 1227
7007e9dd 1228 ret = scsi_alloc_sgtables(cmd);
159b2cbf 1229 if (ret != BLK_STS_OK)
39051dd8 1230 return ret;
7f9a6bc4 1231
7007e9dd 1232 ret = BLK_STS_IOERR;
e249e42d 1233 if (!scsi_device_online(sdp) || sdp->changed) {
cf64e5a5 1234 scmd_printk(KERN_ERR, cmd, "device offline or changed\n");
7007e9dd 1235 goto fail;
1da177e4
LT		 1236 }
1237
f3fa33ac 1238 if (blk_rq_pos(rq) + blk_rq_sectors(rq) > get_capacity(rq->q->disk)) {
cf64e5a5 1239 scmd_printk(KERN_ERR, cmd, "access beyond end of device\n");
7007e9dd 1240 goto fail;
e249e42d
MP		 1241 }
1242
1243 if ((blk_rq_pos(rq) & mask) || (blk_rq_sectors(rq) & mask)) {
cf64e5a5 1244 scmd_printk(KERN_ERR, cmd, "request not aligned to the logical block size\n");
7007e9dd 1245 goto fail;
1da177e4 1246 }
7f9a6bc4 1247
a0899d4d 1248 /*
ec029758
MP		 1249 * Some SD card readers can't handle accesses which touch the
1250 * last one or two logical blocks. Split accesses as needed.
a0899d4d 1251 */
ec029758 1252 threshold = sdkp->capacity - SD_LAST_BUGGY_SECTORS;
18351070 1253
c6c93fdd
MP		 1254 if (unlikely(sdp->last_sector_bug && lba + nr_blocks > threshold)) {
1255 if (lba < threshold) {
18351070 1256 /* Access up to the threshold but not beyond */
c6c93fdd 1257 nr_blocks = threshold - lba;
18351070 1258 } else {
ec029758
MP		 1259 /* Access only a single logical block */
1260 nr_blocks = 1;
18351070
LT		 1261 }
1262 }
a0899d4d 1263
5795eb44
JT		 1264 if (req_op(rq) == REQ_OP_ZONE_APPEND) {
1265 ret = sd_zbc_prepare_zone_append(cmd, &lba, nr_blocks);
1266 if (ret)
7007e9dd 1267 goto fail;
5795eb44
JT		 1268 }
1269
78a02f49 1270 fua = rq->cmd_flags & REQ_FUA ? 0x8 : 0;
cf64e5a5
BVA		 1271 dix = scsi_prot_sg_count(cmd);
1272 dif = scsi_host_dif_capable(cmd->device->host, sdkp->protection_type);
1da177e4 1273
c611529e 1274 if (dif || dix)
cf64e5a5 1275 protect = sd_setup_protect_cmnd(cmd, dix, dif);
af55ff67 1276 else
4e7392ec
MP		 1277 protect = 0;
1278
8475c811 1279 if (protect && sdkp->protection_type == T10_PI_TYPE2_PROTECTION) {
cf64e5a5 1280 ret = sd_setup_rw32_cmnd(cmd, write, lba, nr_blocks,
78a02f49 1281 protect | fua);
c6c93fdd 1282 } else if (sdp->use_16_for_rw || (nr_blocks > 0xffff)) {
cf64e5a5 1283 ret = sd_setup_rw16_cmnd(cmd, write, lba, nr_blocks,
78a02f49 1284 protect | fua);
c6c93fdd 1285 } else if ((nr_blocks > 0xff) || (lba > 0x1fffff) ||
e249e42d 1286 sdp->use_10_for_rw || protect) {
cf64e5a5 1287 ret = sd_setup_rw10_cmnd(cmd, write, lba, nr_blocks,
78a02f49 1288 protect | fua);
1da177e4 1289 } else {
cf64e5a5 1290 ret = sd_setup_rw6_cmnd(cmd, write, lba, nr_blocks,
78a02f49 1291 protect | fua);
1da177e4 1292 }
78a02f49
MP		 1293
1294 if (unlikely(ret != BLK_STS_OK))
7007e9dd 1295 goto fail;
1da177e4
LT		 1296
1297 /*
1298 * We shouldn't disconnect in the middle of a sector, so with a dumb
1299 * host adapter, it's safe to assume that we can at least transfer
1300 * this many bytes between each connect / disconnect.
1301 */
cf64e5a5
BVA		 1302 cmd->transfersize = sdp->sector_size;
1303 cmd->underflow = nr_blocks << 9;
0610959f 1304 cmd->allowed = sdkp->max_retries;
cf64e5a5 1305 cmd->sdb.length = nr_blocks * sdp->sector_size;
e249e42d
MP		 1306
1307 SCSI_LOG_HLQUEUE(1,
cf64e5a5 1308 scmd_printk(KERN_INFO, cmd,
e249e42d
MP		 1309 "%s: block=%llu, count=%d\n", __func__,
1310 (unsigned long long)blk_rq_pos(rq),
1311 blk_rq_sectors(rq)));
1312 SCSI_LOG_HLQUEUE(2,
cf64e5a5 1313 scmd_printk(KERN_INFO, cmd,
e249e42d
MP		 1314 "%s %d/%u 512 byte blocks.\n",
1315 write ? "writing" : "reading", nr_blocks,
1316 blk_rq_sectors(rq)));
1da177e4 1317
1da177e4 1318 /*
7007e9dd 1319 * This indicates that the command is ready from our end to be queued.
1da177e4 1320 */
159b2cbf 1321 return BLK_STS_OK;
7007e9dd
CH		 1322fail:
1323 scsi_free_sgtables(cmd);
1324 return ret;
1da177e4
LT		 1325}
1326
159b2cbf 1327static blk_status_t sd_init_command(struct scsi_cmnd *cmd)
87949eee 1328{
5999ccff 1329 struct request *rq = scsi_cmd_to_rq(cmd);
87949eee 1330
c2df40df
MC		 1331 switch (req_op(rq)) {
1332 case REQ_OP_DISCARD:
f3fa33ac 1333 switch (scsi_disk(rq->q->disk)->provisioning_mode) {
81d926e8
CH		 1334 case SD_LBP_UNMAP:
1335 return sd_setup_unmap_cmnd(cmd);
1336 case SD_LBP_WS16:
02d26103 1337 return sd_setup_write_same16_cmnd(cmd, true);
81d926e8
CH		 1338 case SD_LBP_WS10:
1339 return sd_setup_write_same10_cmnd(cmd, true);
1340 case SD_LBP_ZERO:
1341 return sd_setup_write_same10_cmnd(cmd, false);
1342 default:
159b2cbf 1343 return BLK_STS_TARGET;
81d926e8 1344 }
02d26103
CH		 1345 case REQ_OP_WRITE_ZEROES:
1346 return sd_setup_write_zeroes_cmnd(cmd);
c2df40df 1347 case REQ_OP_WRITE_SAME:
87949eee 1348 return sd_setup_write_same_cmnd(cmd);
3a5e02ce 1349 case REQ_OP_FLUSH:
87949eee 1350 return sd_setup_flush_cmnd(cmd);
c2df40df
MC		 1351 case REQ_OP_READ:
1352 case REQ_OP_WRITE:
5795eb44 1353 case REQ_OP_ZONE_APPEND:
87949eee 1354 return sd_setup_read_write_cmnd(cmd);
89d94756 1355 case REQ_OP_ZONE_RESET:
ad512f20
AJ		 1356 return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_RESET_WRITE_POINTER,
1357 false);
d81e9d49 1358 case REQ_OP_ZONE_RESET_ALL:
ad512f20
AJ		 1359 return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_RESET_WRITE_POINTER,
1360 true);
1361 case REQ_OP_ZONE_OPEN:
1362 return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_OPEN_ZONE, false);
1363 case REQ_OP_ZONE_CLOSE:
1364 return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_CLOSE_ZONE, false);
1365 case REQ_OP_ZONE_FINISH:
1366 return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_FINISH_ZONE, false);
c2df40df 1367 default:
f1f1fada 1368 WARN_ON_ONCE(1);
159b2cbf 1369 return BLK_STS_NOTSUPP;
c2df40df 1370 }
87949eee
CH		 1371}
1372
1373static void sd_uninit_command(struct scsi_cmnd *SCpnt)
1374{
5999ccff 1375 struct request *rq = scsi_cmd_to_rq(SCpnt);
14e3062f 1376 u8 *cmnd;
87949eee 1377
f9d03f96 1378 if (rq->rq_flags & RQF_SPECIAL_PAYLOAD)
61cce6f6 1379 mempool_free(rq->special_vec.bv_page, sd_page_pool);
87949eee 1380
82ed4db4 1381 if (SCpnt->cmnd != scsi_req(rq)->cmd) {
14e3062f 1382 cmnd = SCpnt->cmnd;
87949eee
CH		 1383 SCpnt->cmnd = NULL;
1384 SCpnt->cmd_len = 0;
14e3062f 1385 mempool_free(cmnd, sd_cdb_pool);
87949eee
CH		 1386 }
1387}
1388
d1b7f920
CH		 1389static bool sd_need_revalidate(struct block_device *bdev,
1390 struct scsi_disk *sdkp)
1391{
1392 if (sdkp->device->removable || sdkp->write_prot) {
1393 if (bdev_check_media_change(bdev))
1394 return true;
1395 }
1396
1397 /*
1398 * Force a full rescan after ioctl(BLKRRPART). While the disk state has
1399 * nothing to do with partitions, BLKRRPART is used to force a full
1400 * revalidate after things like a format for historical reasons.
1401 */
1402 return test_bit(GD_NEED_PART_SCAN, &bdev->bd_disk->state);
1403}
1404
1da177e4
LT		 1405/**
1406 * sd_open - open a scsi disk device
7529fbb0
DLM		 1407 * @bdev: Block device of the scsi disk to open
1408 * @mode: FMODE_* mask
1da177e4
LT		 1409 *
1410 * Returns 0 if successful. Returns a negated errno value in case
1411 * of error.
1412 *
1413 * Note: This can be called from a user context (e.g. fsck(1) )
1414 * or from within the kernel (e.g. as a result of a mount(1) ).
1415 * In the latter case @inode and @filp carry an abridged amount
1416 * of information as noted above.
409f3499 1417 *
a8698707 1418 * Locking: called with bdev->bd_disk->open_mutex held.
1da177e4 1419 **/
0338e291 1420static int sd_open(struct block_device *bdev, fmode_t mode)
1da177e4 1421{
0338e291 1422 struct scsi_disk *sdkp = scsi_disk_get(bdev->bd_disk);
1da177e4
LT		 1423 struct scsi_device *sdev;
1424 int retval;
1425
0338e291 1426 if (!sdkp)
1da177e4
LT		 1427 return -ENXIO;
1428
fa0d34be 1429 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_open\n"));
1da177e4
LT		 1430
1431 sdev = sdkp->device;
1432
1433 /*
1434 * If the device is in error recovery, wait until it is done.
1435 * If the device is offline, then disallow any access to it.
1436 */
1437 retval = -ENXIO;
1438 if (!scsi_block_when_processing_errors(sdev))
1439 goto error_out;
1440
d1b7f920
CH		 1441 if (sd_need_revalidate(bdev, sdkp))
1442 sd_revalidate_disk(bdev->bd_disk);
1da177e4
LT		 1443
1444 /*
1445 * If the drive is empty, just let the open fail.
1446 */
1447 retval = -ENOMEDIUM;
0338e291 1448 if (sdev->removable && !sdkp->media_present && !(mode & FMODE_NDELAY))
1da177e4
LT		 1449 goto error_out;
1450
1451 /*
1452 * If the device has the write protect tab set, have the open fail
1453 * if the user expects to be able to write to the thing.
1454 */
1455 retval = -EROFS;
0338e291 1456 if (sdkp->write_prot && (mode & FMODE_WRITE))
1da177e4
LT		 1457 goto error_out;
1458
1459 /*
1460 * It is possible that the disk changing stuff resulted in
1461 * the device being taken offline. If this is the case,
1462 * report this to the user, and don't pretend that the
1463 * open actually succeeded.
1464 */
1465 retval = -ENXIO;
1466 if (!scsi_device_online(sdev))
1467 goto error_out;
1468
409f3499 1469 if ((atomic_inc_return(&sdkp->openers) == 1) && sdev->removable) {
1da177e4
LT		 1470 if (scsi_block_when_processing_errors(sdev))
1471 scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT);
1472 }
1473
1474 return 0;
1475
1476error_out:
1477 scsi_disk_put(sdkp);
1478 return retval;
1479}
1480
1481/**
1482 * sd_release - invoked when the (last) close(2) is called on this
1483 * scsi disk.
7529fbb0
DLM		 1484 * @disk: disk to release
1485 * @mode: FMODE_* mask
1da177e4
LT		 1486 *
1487 * Returns 0.
1488 *
1489 * Note: may block (uninterruptible) if error recovery is underway
1490 * on this disk.
409f3499 1491 *
a8698707 1492 * Locking: called with bdev->bd_disk->open_mutex held.
1da177e4 1493 **/
db2a144b 1494static void sd_release(struct gendisk *disk, fmode_t mode)
1da177e4 1495{
1da177e4
LT		 1496 struct scsi_disk *sdkp = scsi_disk(disk);
1497 struct scsi_device *sdev = sdkp->device;
1498
56937f7b 1499 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_release\n"));
1da177e4 1500
7e443312 1501 if (atomic_dec_return(&sdkp->openers) == 0 && sdev->removable) {
1da177e4
LT		 1502 if (scsi_block_when_processing_errors(sdev))
1503 scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW);
1504 }
1505
1da177e4 1506 scsi_disk_put(sdkp);
1da177e4
LT		 1507}
1508
a885c8c4 1509static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1da177e4
LT		 1510{
1511 struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk);
1512 struct scsi_device *sdp = sdkp->device;
1513 struct Scsi_Host *host = sdp->host;
f08bb1e0 1514 sector_t capacity = logical_to_sectors(sdp, sdkp->capacity);
1da177e4
LT		 1515 int diskinfo[4];
1516
1517 /* default to most commonly used values */
f08bb1e0
MP		 1518 diskinfo[0] = 0x40; /* 1 << 6 */
1519 diskinfo[1] = 0x20; /* 1 << 5 */
1520 diskinfo[2] = capacity >> 11;
1521
1da177e4
LT		 1522 /* override with calculated, extended default, or driver values */
1523 if (host->hostt->bios_param)
f08bb1e0 1524 host->hostt->bios_param(sdp, bdev, capacity, diskinfo);
1da177e4 1525 else
f08bb1e0 1526 scsicam_bios_param(bdev, capacity, diskinfo);
1da177e4 1527
a885c8c4
CH		 1528 geo->heads = diskinfo[0];
1529 geo->sectors = diskinfo[1];
1530 geo->cylinders = diskinfo[2];
1da177e4
LT		 1531 return 0;
1532}
1533
1534/**
44328310 1535 * sd_ioctl - process an ioctl
7529fbb0
DLM		 1536 * @bdev: target block device
1537 * @mode: FMODE_* mask
1da177e4 1538 * @cmd: ioctl command number
44328310 1539 * @arg: this is third argument given to ioctl(2) system call.
1da177e4
LT		 1540 * Often contains a pointer.
1541 *
25985edc 1542 * Returns 0 if successful (some ioctls return positive numbers on
1da177e4
LT		 1543 * success as well). Returns a negated errno value in case of error.
1544 *
1545 * Note: most ioctls are forward onto the block subsystem or further
3a4fa0a2 1546 * down in the scsi subsystem.
1da177e4 1547 **/
44328310
CH		 1548static int sd_ioctl(struct block_device *bdev, fmode_t mode,
1549 unsigned int cmd, unsigned long arg)
1da177e4 1550{
1da177e4 1551 struct gendisk *disk = bdev->bd_disk;
fe2d1851
NN		 1552 struct scsi_disk *sdkp = scsi_disk(disk);
1553 struct scsi_device *sdp = sdkp->device;
44328310 1554 void __user *p = (void __user *)arg;
1da177e4
LT		 1555 int error;
1556
fe2d1851
NN		 1557 SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO, sdkp, "sd_ioctl: disk=%s, "
1558 "cmd=0x%x\n", disk->disk_name, cmd));
1da177e4 1559
4f07bfc5
CH		 1560 if (bdev_is_partition(bdev) && !capable(CAP_SYS_RAWIO))
1561 return -ENOIOCTLCMD;
0bfc96cb 1562
1da177e4
LT		 1563 /*
1564 * If we are in the middle of error recovery, don't let anyone
1565 * else try and use this device. Also, if error recovery fails, it
1566 * may try and take the device offline, in which case all further
1567 * access to the device is prohibited.
1568 */
906d15fb
CH		 1569 error = scsi_ioctl_block_when_processing_errors(sdp, cmd,
1570 (mode & FMODE_NDELAY) != 0);
1571 if (error)
44328310 1572 return error;
1da177e4 1573
d80210f2
CH		 1574 if (is_sed_ioctl(cmd))
1575 return sed_ioctl(sdkp->opal_dev, cmd, p);
a30e3441 1576 return scsi_ioctl(sdp, mode, cmd, p);
1da177e4
LT		 1577}
1578
1579static void set_media_not_present(struct scsi_disk *sdkp)
1580{
2bae0093
TH		 1581 if (sdkp->media_present)
1582 sdkp->device->changed = 1;
1583
1584 if (sdkp->device->removable) {
1585 sdkp->media_present = 0;
1586 sdkp->capacity = 0;
1587 }
1588}
1589
1590static int media_not_present(struct scsi_disk *sdkp,
1591 struct scsi_sense_hdr *sshdr)
1592{
1593 if (!scsi_sense_valid(sshdr))
1594 return 0;
1595
1596 /* not invoked for commands that could return deferred errors */
1597 switch (sshdr->sense_key) {
1598 case UNIT_ATTENTION:
1599 case NOT_READY:
1600 /* medium not present */
1601 if (sshdr->asc == 0x3A) {
1602 set_media_not_present(sdkp);
1603 return 1;
1604 }
1605 }
1606 return 0;
1da177e4
LT		 1607}
1608
1609/**
2bae0093
TH		 1610 * sd_check_events - check media events
1611 * @disk: kernel device descriptor
1612 * @clearing: disk events currently being cleared
1da177e4 1613 *
2bae0093 1614 * Returns mask of DISK_EVENT_*.
1da177e4
LT		 1615 *
1616 * Note: this function is invoked from the block subsystem.
1617 **/
2bae0093 1618static unsigned int sd_check_events(struct gendisk *disk, unsigned int clearing)
1da177e4 1619{
eb72d0bb
HR		 1620 struct scsi_disk *sdkp = scsi_disk_get(disk);
1621 struct scsi_device *sdp;
1da177e4 1622 int retval;
41e70e30 1623 bool disk_changed;
1da177e4 1624
eb72d0bb
HR		 1625 if (!sdkp)
1626 return 0;
1627
1628 sdp = sdkp->device;
2bae0093 1629 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_check_events\n"));
1da177e4
LT		 1630
1631 /*
1632 * If the device is offline, don't send any commands - just pretend as
1633 * if the command failed. If the device ever comes back online, we
1634 * can deal with it then. It is only because of unrecoverable errors
1635 * that we would ever take a device offline in the first place.
1636 */
285e9670
KS		 1637 if (!scsi_device_online(sdp)) {
1638 set_media_not_present(sdkp);
285e9670
KS		 1639 goto out;
1640 }
1da177e4
LT		 1641
1642 /*
1643 * Using TEST_UNIT_READY enables differentiation between drive with
1644 * no cartridge loaded - NOT READY, drive with changed cartridge -
1645 * UNIT ATTENTION, or with same cartridge - GOOD STATUS.
1646 *
1647 * Drives that auto spin down. eg iomega jaz 1G, will be started
1648 * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever
1649 * sd_revalidate() is called.
1650 */
001aac25 1651 if (scsi_block_when_processing_errors(sdp)) {
6fa2b8f9
CH		 1652 struct scsi_sense_hdr sshdr = { 0, };
1653
0610959f 1654 retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, sdkp->max_retries,
6fa2b8f9 1655 &sshdr);
1da177e4 1656
6fa2b8f9 1657 /* failed to execute TUR, assume media not present */
ced202f7 1658 if (retval < 0 || host_byte(retval)) {
6fa2b8f9
CH		 1659 set_media_not_present(sdkp);
1660 goto out;
1661 }
1da177e4 1662
6fa2b8f9
CH		 1663 if (media_not_present(sdkp, &sshdr))
1664 goto out;
1665 }
2bae0093 1666
1da177e4
LT		 1667 /*
1668 * For removable scsi disk we have to recognise the presence
2bae0093 1669 * of a disk in the drive.
1da177e4 1670 */
2bae0093
TH		 1671 if (!sdkp->media_present)
1672 sdp->changed = 1;
1da177e4 1673 sdkp->media_present = 1;
285e9670 1674out:
3ff5588d 1675 /*
2bae0093 1676 * sdp->changed is set under the following conditions:
3ff5588d 1677 *
2bae0093
TH		 1678 * Medium present state has changed in either direction.
1679 * Device has indicated UNIT_ATTENTION.
3ff5588d 1680 */
41e70e30 1681 disk_changed = sdp->changed;
2bae0093 1682 sdp->changed = 0;
eb72d0bb 1683 scsi_disk_put(sdkp);
41e70e30 1684 return disk_changed ? DISK_EVENT_MEDIA_CHANGE : 0;
1da177e4
LT		 1685}
1686
4fa83244 1687static int sd_sync_cache(struct scsi_disk *sdkp, struct scsi_sense_hdr *sshdr)
1da177e4 1688{
1da177e4 1689 int retries, res;
e73aec82 1690 struct scsi_device *sdp = sdkp->device;
7e660100
JB		 1691 const int timeout = sdp->request_queue->rq_timeout
1692 * SD_FLUSH_TIMEOUT_MULTIPLIER;
4fa83244 1693 struct scsi_sense_hdr my_sshdr;
1da177e4
LT		 1694
1695 if (!scsi_device_online(sdp))
1696 return -ENODEV;
1697
4fa83244
DB		 1698 /* caller might not be interested in sense, but we need it */
1699 if (!sshdr)
1700 sshdr = &my_sshdr;
1701
1da177e4
LT		 1702 for (retries = 3; retries > 0; --retries) {
1703 unsigned char cmd[10] = { 0 };
1704
1705 cmd[0] = SYNCHRONIZE_CACHE;
1706 /*
1707 * Leave the rest of the command zero to indicate
1708 * flush everything.
1709 */
4fa83244 1710 res = scsi_execute(sdp, cmd, DMA_NONE, NULL, 0, NULL, sshdr,
0610959f 1711 timeout, sdkp->max_retries, 0, RQF_PM, NULL);
ea73a9f2 1712 if (res == 0)
1da177e4
LT		 1713 break;
1714 }
1715
e73aec82 1716 if (res) {
ef61329d 1717 sd_print_result(sdkp, "Synchronize Cache(10) failed", res);
95897910 1718
ced202f7
HR		 1719 if (res < 0)
1720 return res;
1721
464a00c9
HR		 1722 if (scsi_status_is_check_condition(res) &&
1723 scsi_sense_valid(sshdr)) {
4fa83244
DB		 1724 sd_print_sense_hdr(sdkp, sshdr);
1725
464a00c9
HR		 1726 /* we need to evaluate the error return */
1727 if (sshdr->asc == 0x3a || /* medium not present */
1728 sshdr->asc == 0x20 || /* invalid command */
1729 (sshdr->asc == 0x74 && sshdr->ascq == 0x71)) /* drive is password locked */
95897910
ON		 1730 /* this is no error here */
1731 return 0;
464a00c9 1732 }
95897910
ON		 1733
1734 switch (host_byte(res)) {
1735 /* ignore errors due to racing a disconnection */
1736 case DID_BAD_TARGET:
1737 case DID_NO_CONNECT:
1738 return 0;
1739 /* signal the upper layer it might try again */
1740 case DID_BUS_BUSY:
1741 case DID_IMM_RETRY:
1742 case DID_REQUEUE:
1743 case DID_SOFT_ERROR:
1744 return -EBUSY;
1745 default:
1746 return -EIO;
1747 }
1da177e4 1748 }
3721050a 1749 return 0;
1da177e4
LT		 1750}
1751
1da177e4
LT		 1752static void sd_rescan(struct device *dev)
1753{
3d9a1f53 1754 struct scsi_disk *sdkp = dev_get_drvdata(dev);
39b7f1e2 1755
b200e38c 1756 sd_revalidate_disk(sdkp->disk);
1da177e4
LT		 1757}
1758
b83ce214
CH		 1759static int sd_get_unique_id(struct gendisk *disk, u8 id[16],
1760 enum blk_unique_id type)
1761{
1762 struct scsi_device *sdev = scsi_disk(disk)->device;
1763 const struct scsi_vpd *vpd;
1764 const unsigned char *d;
1765 int ret = -ENXIO, len;
1766
1767 rcu_read_lock();
1768 vpd = rcu_dereference(sdev->vpd_pg83);
1769 if (!vpd)
1770 goto out_unlock;
1771
1772 ret = -EINVAL;
1773 for (d = vpd->data + 4; d < vpd->data + vpd->len; d += d[3] + 4) {
1774 /* we only care about designators with LU association */
1775 if (((d[1] >> 4) & 0x3) != 0x00)
1776 continue;
1777 if ((d[1] & 0xf) != type)
1778 continue;
1779
1780 /*
1781 * Only exit early if a 16-byte descriptor was found. Otherwise
1782 * keep looking as one with more entropy might still show up.
1783 */
1784 len = d[3];
1785 if (len != 8 && len != 12 && len != 16)
1786 continue;
1787 ret = len;
1788 memcpy(id, d + 4, len);
1789 if (len == 16)
1790 break;
1791 }
1792out_unlock:
1793 rcu_read_unlock();
1794 return ret;
1795}
1796
924d55b0
CH		 1797static char sd_pr_type(enum pr_type type)
1798{
1799 switch (type) {
1800 case PR_WRITE_EXCLUSIVE:
1801 return 0x01;
1802 case PR_EXCLUSIVE_ACCESS:
1803 return 0x03;
1804 case PR_WRITE_EXCLUSIVE_REG_ONLY:
1805 return 0x05;
1806 case PR_EXCLUSIVE_ACCESS_REG_ONLY:
1807 return 0x06;
1808 case PR_WRITE_EXCLUSIVE_ALL_REGS:
1809 return 0x07;
1810 case PR_EXCLUSIVE_ACCESS_ALL_REGS:
1811 return 0x08;
1812 default:
1813 return 0;
1814 }
1815};
1816
1817static int sd_pr_command(struct block_device *bdev, u8 sa,
1818 u64 key, u64 sa_key, u8 type, u8 flags)
1819{
0610959f
MC		 1820 struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk);
1821 struct scsi_device *sdev = sdkp->device;
924d55b0
CH		 1822 struct scsi_sense_hdr sshdr;
1823 int result;
1824 u8 cmd[16] = { 0, };
1825 u8 data[24] = { 0, };
1826
1827 cmd[0] = PERSISTENT_RESERVE_OUT;
1828 cmd[1] = sa;
1829 cmd[2] = type;
1830 put_unaligned_be32(sizeof(data), &cmd[5]);
1831
1832 put_unaligned_be64(key, &data[0]);
1833 put_unaligned_be64(sa_key, &data[8]);
1834 data[20] = flags;
1835
1836 result = scsi_execute_req(sdev, cmd, DMA_TO_DEVICE, &data, sizeof(data),
0610959f 1837 &sshdr, SD_TIMEOUT, sdkp->max_retries, NULL);
924d55b0 1838
464a00c9 1839 if (scsi_status_is_check_condition(result) &&
c65be1a6 1840 scsi_sense_valid(&sshdr)) {
924d55b0
CH		 1841 sdev_printk(KERN_INFO, sdev, "PR command failed: %d\n", result);
1842 scsi_print_sense_hdr(sdev, NULL, &sshdr);
1843 }
1844
1845 return result;
1846}
1847
1848static int sd_pr_register(struct block_device *bdev, u64 old_key, u64 new_key,
1849 u32 flags)
1850{
1851 if (flags & ~PR_FL_IGNORE_KEY)
1852 return -EOPNOTSUPP;
1853 return sd_pr_command(bdev, (flags & PR_FL_IGNORE_KEY) ? 0x06 : 0x00,
1854 old_key, new_key, 0,
01f90dd9 1855 (1 << 0) /* APTPL */);
924d55b0
CH		 1856}
1857
1858static int sd_pr_reserve(struct block_device *bdev, u64 key, enum pr_type type,
1859 u32 flags)
1860{
1861 if (flags)
1862 return -EOPNOTSUPP;
1863 return sd_pr_command(bdev, 0x01, key, 0, sd_pr_type(type), 0);
1864}
1865
1866static int sd_pr_release(struct block_device *bdev, u64 key, enum pr_type type)
1867{
1868 return sd_pr_command(bdev, 0x02, key, 0, sd_pr_type(type), 0);
1869}
1870
1871static int sd_pr_preempt(struct block_device *bdev, u64 old_key, u64 new_key,
1872 enum pr_type type, bool abort)
1873{
1874 return sd_pr_command(bdev, abort ? 0x05 : 0x04, old_key, new_key,
1875 sd_pr_type(type), 0);
1876}
1877
1878static int sd_pr_clear(struct block_device *bdev, u64 key)
1879{
1880 return sd_pr_command(bdev, 0x03, key, 0, 0, 0);
1881}
1882
1883static const struct pr_ops sd_pr_ops = {
1884 .pr_register = sd_pr_register,
1885 .pr_reserve = sd_pr_reserve,
1886 .pr_release = sd_pr_release,
1887 .pr_preempt = sd_pr_preempt,
1888 .pr_clear = sd_pr_clear,
1889};
1890
83d5cde4 1891static const struct block_device_operations sd_fops = {
1da177e4 1892 .owner = THIS_MODULE,
0338e291
AV		 1893 .open = sd_open,
1894 .release = sd_release,
8a6cfeb6 1895 .ioctl = sd_ioctl,
a885c8c4 1896 .getgeo = sd_getgeo,
44328310 1897 .compat_ioctl = blkdev_compat_ptr_ioctl,
2bae0093 1898 .check_events = sd_check_events,
72ec24bd 1899 .unlock_native_capacity = sd_unlock_native_capacity,
e76239a3 1900 .report_zones = sd_zbc_report_zones,
b83ce214 1901 .get_unique_id = sd_get_unique_id,
924d55b0 1902 .pr_ops = &sd_pr_ops,
1da177e4
LT		 1903};
1904
7a38dc0b
HR		 1905/**
1906 * sd_eh_reset - reset error handling callback
1907 * @scmd: sd-issued command that has failed
1908 *
1909 * This function is called by the SCSI midlayer before starting
1910 * SCSI EH. When counting medium access failures we have to be
1911 * careful to register it only only once per device and SCSI EH run;
1912 * there might be several timed out commands which will cause the
1913 * 'max_medium_access_timeouts' counter to trigger after the first
1914 * SCSI EH run already and set the device to offline.
1915 * So this function resets the internal counter before starting SCSI EH.
1916 **/
1917static void sd_eh_reset(struct scsi_cmnd *scmd)
1918{
f3fa33ac 1919 struct scsi_disk *sdkp = scsi_disk(scsi_cmd_to_rq(scmd)->q->disk);
7a38dc0b
HR		 1920
1921 /* New SCSI EH run, reset gate variable */
1922 sdkp->ignore_medium_access_errors = false;
1923}
1924
18a4d0a2
MP		 1925/**
1926 * sd_eh_action - error handling callback
1927 * @scmd: sd-issued command that has failed
18a4d0a2
MP		 1928 * @eh_disp: The recovery disposition suggested by the midlayer
1929 *
2451079b
JB		 1930 * This function is called by the SCSI midlayer upon completion of an
1931 * error test command (currently TEST UNIT READY). The result of sending
1932 * the eh command is passed in eh_disp. We're looking for devices that
1933 * fail medium access commands but are OK with non access commands like
1934 * test unit ready (so wrongly see the device as having a successful
1935 * recovery)
18a4d0a2 1936 **/
2451079b 1937static int sd_eh_action(struct scsi_cmnd *scmd, int eh_disp)
18a4d0a2 1938{
f3fa33ac 1939 struct scsi_disk *sdkp = scsi_disk(scsi_cmd_to_rq(scmd)->q->disk);
0db6ca8a 1940 struct scsi_device *sdev = scmd->device;
18a4d0a2 1941
0db6ca8a 1942 if (!scsi_device_online(sdev) ||
2451079b
JB		 1943 !scsi_medium_access_command(scmd) ||
1944 host_byte(scmd->result) != DID_TIME_OUT ||
1945 eh_disp != SUCCESS)
18a4d0a2
MP		 1946 return eh_disp;
1947
1948 /*
1949 * The device has timed out executing a medium access command.
1950 * However, the TEST UNIT READY command sent during error
1951 * handling completed successfully. Either the device is in the
1952 * process of recovering or has it suffered an internal failure
1953 * that prevents access to the storage medium.
1954 */
7a38dc0b
HR		 1955 if (!sdkp->ignore_medium_access_errors) {
1956 sdkp->medium_access_timed_out++;
1957 sdkp->ignore_medium_access_errors = true;
1958 }
18a4d0a2
MP		 1959
1960 /*
1961 * If the device keeps failing read/write commands but TEST UNIT
1962 * READY always completes successfully we assume that medium
1963 * access is no longer possible and take the device offline.
1964 */
1965 if (sdkp->medium_access_timed_out >= sdkp->max_medium_access_timeouts) {
1966 scmd_printk(KERN_ERR, scmd,
1967 "Medium access timeout failure. Offlining disk!\n");
0db6ca8a
BVA		 1968 mutex_lock(&sdev->state_mutex);
1969 scsi_device_set_state(sdev, SDEV_OFFLINE);
1970 mutex_unlock(&sdev->state_mutex);
18a4d0a2 1971
e8f8d50e 1972 return SUCCESS;
18a4d0a2
MP		 1973 }
1974
1975 return eh_disp;
1976}
1977
af55ff67
MP		 1978static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd)
1979{
5999ccff 1980 struct request *req = scsi_cmd_to_rq(scmd);
6eadc612
DLM		 1981 struct scsi_device *sdev = scmd->device;
1982 unsigned int transferred, good_bytes;
1983 u64 start_lba, end_lba, bad_lba;
1984
a8733c7b 1985 /*
6eadc612
DLM		 1986 * Some commands have a payload smaller than the device logical
1987 * block size (e.g. INQUIRY on a 4K disk).
a8733c7b 1988 */
6eadc612 1989 if (scsi_bufflen(scmd) <= sdev->sector_size)
af55ff67
MP		 1990 return 0;
1991
6eadc612
DLM		 1992 /* Check if we have a 'bad_lba' information */
1993 if (!scsi_get_sense_info_fld(scmd->sense_buffer,
1994 SCSI_SENSE_BUFFERSIZE,
1995 &bad_lba))
af55ff67
MP		 1996 return 0;
1997
6eadc612
DLM		 1998 /*
1999 * If the bad lba was reported incorrectly, we have no idea where
af55ff67
MP		 2000 * the error is.
2001 */
6eadc612
DLM		 2002 start_lba = sectors_to_logical(sdev, blk_rq_pos(req));
2003 end_lba = start_lba + bytes_to_logical(sdev, scsi_bufflen(scmd));
2004 if (bad_lba < start_lba || bad_lba >= end_lba)
af55ff67
MP		 2005 return 0;
2006
6eadc612
DLM		 2007 /*
2008 * resid is optional but mostly filled in. When it's unused,
2009 * its value is zero, so we assume the whole buffer transferred
af55ff67 2010 */
6eadc612
DLM		 2011 transferred = scsi_bufflen(scmd) - scsi_get_resid(scmd);
2012
2013 /* This computation should always be done in terms of the
2014 * resolution of the device's medium.
af55ff67 2015 */
6eadc612
DLM		 2016 good_bytes = logical_to_bytes(sdev, bad_lba - start_lba);
2017
a8733c7b 2018 return min(good_bytes, transferred);
af55ff67
MP		 2019}
2020
1da177e4 2021/**
7b3d9545 2022 * sd_done - bottom half handler: called when the lower level
1da177e4
LT		 2023 * driver has completed (successfully or otherwise) a scsi command.
2024 * @SCpnt: mid-level's per command structure.
2025 *
2026 * Note: potentially run from within an ISR. Must not block.
2027 **/
7b3d9545 2028static int sd_done(struct scsi_cmnd *SCpnt)
1da177e4
LT		 2029{
2030 int result = SCpnt->result;
af55ff67 2031 unsigned int good_bytes = result ? 0 : scsi_bufflen(SCpnt);
c46f0917
DLM		 2032 unsigned int sector_size = SCpnt->device->sector_size;
2033 unsigned int resid;
1da177e4 2034 struct scsi_sense_hdr sshdr;
5999ccff 2035 struct request *req = scsi_cmd_to_rq(SCpnt);
f3fa33ac 2036 struct scsi_disk *sdkp = scsi_disk(req->q->disk);
1da177e4
LT		 2037 int sense_valid = 0;
2038 int sense_deferred = 0;
1da177e4 2039
89d94756
HR		 2040 switch (req_op(req)) {
2041 case REQ_OP_DISCARD:
02d26103 2042 case REQ_OP_WRITE_ZEROES:
89d94756
HR		 2043 case REQ_OP_WRITE_SAME:
2044 case REQ_OP_ZONE_RESET:
d81e9d49 2045 case REQ_OP_ZONE_RESET_ALL:
ad512f20
AJ		 2046 case REQ_OP_ZONE_OPEN:
2047 case REQ_OP_ZONE_CLOSE:
2048 case REQ_OP_ZONE_FINISH:
26e85fcd
MP		 2049 if (!result) {
2050 good_bytes = blk_rq_bytes(req);
2051 scsi_set_resid(SCpnt, 0);
2052 } else {
2053 good_bytes = 0;
2054 scsi_set_resid(SCpnt, blk_rq_bytes(req));
89d94756
HR		 2055 }
2056 break;
c46f0917
DLM		 2057 default:
2058 /*
2059 * In case of bogus fw or device, we could end up having
2060 * an unaligned partial completion. Check this here and force
2061 * alignment.
2062 */
2063 resid = scsi_get_resid(SCpnt);
2064 if (resid & (sector_size - 1)) {
2065 sd_printk(KERN_INFO, sdkp,
2066 "Unaligned partial completion (resid=%u, sector_sz=%u)\n",
2067 resid, sector_size);
670d8be2 2068 scsi_print_command(SCpnt);
c46f0917
DLM		 2069 resid = min(scsi_bufflen(SCpnt),
2070 round_up(resid, sector_size));
2071 scsi_set_resid(SCpnt, resid);
2072 }
26e85fcd 2073 }
6a32a8ae 2074
1da177e4
LT		 2075 if (result) {
2076 sense_valid = scsi_command_normalize_sense(SCpnt, &sshdr);
2077 if (sense_valid)
2078 sense_deferred = scsi_sense_is_deferred(&sshdr);
2079 }
2a863ba8
DJ		 2080 sdkp->medium_access_timed_out = 0;
2081
464a00c9 2082 if (!scsi_status_is_check_condition(result) &&
03aba2f7
LT		 2083 (!sense_valid || sense_deferred))
2084 goto out;
2085
2086 switch (sshdr.sense_key) {
2087 case HARDWARE_ERROR:
2088 case MEDIUM_ERROR:
af55ff67 2089 good_bytes = sd_completed_bytes(SCpnt);
03aba2f7
LT		 2090 break;
2091 case RECOVERED_ERROR:
af55ff67
MP		 2092 good_bytes = scsi_bufflen(SCpnt);
2093 break;
10dab226
JW		 2094 case NO_SENSE:
2095 /* This indicates a false check condition, so ignore it. An
2096 * unknown amount of data was transferred so treat it as an
2097 * error.
2098 */
10dab226
JW		 2099 SCpnt->result = 0;
2100 memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
2101 break;
c98a0eb0
MP		 2102 case ABORTED_COMMAND:
2103 if (sshdr.asc == 0x10) /* DIF: Target detected corruption */
2104 good_bytes = sd_completed_bytes(SCpnt);
2105 break;
2106 case ILLEGAL_REQUEST:
d227ec26
CH		 2107 switch (sshdr.asc) {
2108 case 0x10: /* DIX: Host detected corruption */
af55ff67 2109 good_bytes = sd_completed_bytes(SCpnt);
d227ec26
CH		 2110 break;
2111 case 0x20: /* INVALID COMMAND OPCODE */
2112 case 0x24: /* INVALID FIELD IN CDB */
2113 switch (SCpnt->cmnd[0]) {
5db44863
MP		 2114 case UNMAP:
2115 sd_config_discard(sdkp, SD_LBP_DISABLE);
2116 break;
2117 case WRITE_SAME_16:
2118 case WRITE_SAME:
d227ec26 2119 if (SCpnt->cmnd[1] & 8) { /* UNMAP */
5db44863 2120 sd_config_discard(sdkp, SD_LBP_DISABLE);
d227ec26 2121 } else {
5db44863
MP		 2122 sdkp->device->no_write_same = 1;
2123 sd_config_write_same(sdkp);
e8064021 2124 req->rq_flags |= RQF_QUIET;
5db44863 2125 }
d227ec26 2126 break;
5db44863
MP		 2127 }
2128 }
03aba2f7
LT		 2129 break;
2130 default:
2131 break;
1da177e4 2132 }
89d94756 2133
03aba2f7 2134 out:
89d94756 2135 if (sd_is_zoned(sdkp))
5795eb44 2136 good_bytes = sd_zbc_complete(SCpnt, good_bytes, &sshdr);
89d94756 2137
ef61329d
HR		 2138 SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO, SCpnt,
2139 "sd_done: completed %d of %d bytes\n",
2140 good_bytes, scsi_bufflen(SCpnt)));
2141
7b3d9545 2142 return good_bytes;
1da177e4
LT		 2143}
2144
1da177e4
LT		 2145/*
2146 * spinup disk - called only in sd_revalidate_disk()
2147 */
2148static void
e73aec82 2149sd_spinup_disk(struct scsi_disk *sdkp)
ea73a9f2 2150{
1da177e4 2151 unsigned char cmd[10];
4451e472 2152 unsigned long spintime_expire = 0;
1da177e4
LT		 2153 int retries, spintime;
2154 unsigned int the_result;
2155 struct scsi_sense_hdr sshdr;
2156 int sense_valid = 0;
2157
2158 spintime = 0;
2159
2160 /* Spin up drives, as required. Only do this at boot time */
2161 /* Spinup needs to be done for module loads too. */
2162 do {
2163 retries = 0;
2164
2165 do {
4521428c
HK		 2166 bool media_was_present = sdkp->media_present;
2167
1da177e4
LT		 2168 cmd[0] = TEST_UNIT_READY;
2169 memset((void *) &cmd[1], 0, 9);
2170
ea73a9f2
JB		 2171 the_result = scsi_execute_req(sdkp->device, cmd,
2172 DMA_NONE, NULL, 0,
2173 &sshdr, SD_TIMEOUT,
0610959f 2174 sdkp->max_retries, NULL);
1da177e4 2175
b4d38e38
AS		 2176 /*
2177 * If the drive has indicated to us that it
2178 * doesn't have any media in it, don't bother
2179 * with any more polling.
2180 */
848ade90 2181 if (media_not_present(sdkp, &sshdr)) {
4521428c
HK		 2182 if (media_was_present)
2183 sd_printk(KERN_NOTICE, sdkp, "Media removed, stopped polling\n");
b4d38e38 2184 return;
848ade90 2185 }
b4d38e38 2186
1da177e4 2187 if (the_result)
ea73a9f2 2188 sense_valid = scsi_sense_valid(&sshdr);
1da177e4 2189 retries++;
464a00c9 2190 } while (retries < 3 &&
1da177e4 2191 (!scsi_status_is_good(the_result) ||
464a00c9 2192 (scsi_status_is_check_condition(the_result) &&
1da177e4
LT		 2193 sense_valid && sshdr.sense_key == UNIT_ATTENTION)));
2194
464a00c9 2195 if (!scsi_status_is_check_condition(the_result)) {
1da177e4
LT		 2196 /* no sense, TUR either succeeded or failed
2197 * with a status error */
e73aec82 2198 if(!spintime && !scsi_status_is_good(the_result)) {
ef61329d
HR		 2199 sd_print_result(sdkp, "Test Unit Ready failed",
2200 the_result);
e73aec82 2201 }
1da177e4
LT		 2202 break;
2203 }
ef61329d 2204
1da177e4
LT		 2205 /*
2206 * The device does not want the automatic start to be issued.
2207 */
33dd6f92 2208 if (sdkp->device->no_start_on_add)
1da177e4 2209 break;
1da177e4 2210
33dd6f92
MW		 2211 if (sense_valid && sshdr.sense_key == NOT_READY) {
2212 if (sshdr.asc == 4 && sshdr.ascq == 3)
2213 break; /* manual intervention required */
2214 if (sshdr.asc == 4 && sshdr.ascq == 0xb)
2215 break; /* standby */
2216 if (sshdr.asc == 4 && sshdr.ascq == 0xc)
2217 break; /* unavailable */
505aa4b6
MR		 2218 if (sshdr.asc == 4 && sshdr.ascq == 0x1b)
2219 break; /* sanitize in progress */
33dd6f92
MW		 2220 /*
2221 * Issue command to spin up drive when not ready
2222 */
1da177e4 2223 if (!spintime) {
e73aec82 2224 sd_printk(KERN_NOTICE, sdkp, "Spinning up disk...");
1da177e4
LT		 2225 cmd[0] = START_STOP;
2226 cmd[1] = 1; /* Return immediately */
2227 memset((void *) &cmd[2], 0, 8);
2228 cmd[4] = 1; /* Start spin cycle */
d2886ea3
SR		 2229 if (sdkp->device->start_stop_pwr_cond)
2230 cmd[4] |= 1 << 4;
ea73a9f2
JB		 2231 scsi_execute_req(sdkp->device, cmd, DMA_NONE,
2232 NULL, 0, &sshdr,
0610959f 2233 SD_TIMEOUT, sdkp->max_retries,
f4f4e47e 2234 NULL);
4451e472
AS		 2235 spintime_expire = jiffies + 100 * HZ;
2236 spintime = 1;
1da177e4 2237 }
1da177e4
LT		 2238 /* Wait 1 second for next try */
2239 msleep(1000);
3a1d0783 2240 printk(KERN_CONT ".");
4451e472
AS		 2241
2242 /*
2243 * Wait for USB flash devices with slow firmware.
2244 * Yes, this sense key/ASC combination shouldn't
2245 * occur here. It's characteristic of these devices.
2246 */
2247 } else if (sense_valid &&
2248 sshdr.sense_key == UNIT_ATTENTION &&
2249 sshdr.asc == 0x28) {
2250 if (!spintime) {
2251 spintime_expire = jiffies + 5 * HZ;
2252 spintime = 1;
2253 }
2254 /* Wait 1 second for next try */
2255 msleep(1000);
1da177e4
LT		 2256 } else {
2257 /* we don't understand the sense code, so it's
2258 * probably pointless to loop */
2259 if(!spintime) {
e73aec82
MP		 2260 sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n");
2261 sd_print_sense_hdr(sdkp, &sshdr);
1da177e4
LT		 2262 }
2263 break;
2264 }
2265
4451e472 2266 } while (spintime && time_before_eq(jiffies, spintime_expire));
1da177e4
LT		 2267
2268 if (spintime) {
2269 if (scsi_status_is_good(the_result))
3a1d0783 2270 printk(KERN_CONT "ready\n");
1da177e4 2271 else
3a1d0783 2272 printk(KERN_CONT "not responding...\n");
1da177e4
LT		 2273 }
2274}
2275
e0597d70
MP		 2276/*
2277 * Determine whether disk supports Data Integrity Field.
2278 */
fe542396 2279static int sd_read_protection_type(struct scsi_disk *sdkp, unsigned char *buffer)
e0597d70
MP		 2280{
2281 struct scsi_device *sdp = sdkp->device;
2282 u8 type;
fe542396 2283 int ret = 0;
e0597d70 2284
465f4eda
XC		 2285 if (scsi_device_protection(sdp) == 0 || (buffer[12] & 1) == 0) {
2286 sdkp->protection_type = 0;
fe542396 2287 return ret;
465f4eda 2288 }
35e1a5d9
MP		 2289
2290 type = ((buffer[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */
2291
8475c811 2292 if (type > T10_PI_TYPE3_PROTECTION)
fe542396
MP		 2293 ret = -ENODEV;
2294 else if (scsi_host_dif_capable(sdp->host, type))
2295 ret = 1;
2296
2297 if (sdkp->first_scan || type != sdkp->protection_type)
2298 switch (ret) {
2299 case -ENODEV:
2300 sd_printk(KERN_ERR, sdkp, "formatted with unsupported" \
2301 " protection type %u. Disabling disk!\n",
2302 type);
2303 break;
2304 case 1:
2305 sd_printk(KERN_NOTICE, sdkp,
2306 "Enabling DIF Type %u protection\n", type);
2307 break;
2308 case 0:
2309 sd_printk(KERN_NOTICE, sdkp,
2310 "Disabling DIF Type %u protection\n", type);
2311 break;
2312 }
e0597d70 2313
be922f47
MP		 2314 sdkp->protection_type = type;
2315
fe542396 2316 return ret;
e0597d70
MP		 2317}
2318
0da205e0
MW		 2319static void read_capacity_error(struct scsi_disk *sdkp, struct scsi_device *sdp,
2320 struct scsi_sense_hdr *sshdr, int sense_valid,
2321 int the_result)
2322{
464a00c9 2323 if (sense_valid)
0da205e0
MW		 2324 sd_print_sense_hdr(sdkp, sshdr);
2325 else
2326 sd_printk(KERN_NOTICE, sdkp, "Sense not available.\n");
2327
2328 /*
2329 * Set dirty bit for removable devices if not ready -
2330 * sometimes drives will not report this properly.
2331 */
2332 if (sdp->removable &&
2333 sense_valid && sshdr->sense_key == NOT_READY)
2bae0093 2334 set_media_not_present(sdkp);
0da205e0
MW		 2335
2336 /*
2337 * We used to set media_present to 0 here to indicate no media
2338 * in the drive, but some drives fail read capacity even with
2339 * media present, so we can't do that.
2340 */
2341 sdkp->capacity = 0; /* unknown mapped to zero - as usual */
2342}
2343
2344#define RC16_LEN 32
2345#if RC16_LEN > SD_BUF_SIZE
2346#error RC16_LEN must not be more than SD_BUF_SIZE
2347#endif
2348
3233ac19
JB		 2349#define READ_CAPACITY_RETRIES_ON_RESET 10
2350
0da205e0
MW		 2351static int read_capacity_16(struct scsi_disk *sdkp, struct scsi_device *sdp,
2352 unsigned char *buffer)
ea73a9f2 2353{
1da177e4 2354 unsigned char cmd[16];
1da177e4
LT		 2355 struct scsi_sense_hdr sshdr;
2356 int sense_valid = 0;
0da205e0 2357 int the_result;
3233ac19 2358 int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET;
ea09bcc9 2359 unsigned int alignment;
0da205e0
MW		 2360 unsigned long long lba;
2361 unsigned sector_size;
1da177e4 2362
5ce524bd
HG		 2363 if (sdp->no_read_capacity_16)
2364 return -EINVAL;
2365
1da177e4 2366 do {
0da205e0 2367 memset(cmd, 0, 16);
eb846d9f 2368 cmd[0] = SERVICE_ACTION_IN_16;
0da205e0
MW		 2369 cmd[1] = SAI_READ_CAPACITY_16;
2370 cmd[13] = RC16_LEN;
2371 memset(buffer, 0, RC16_LEN);
2372
ea73a9f2 2373 the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE,
0da205e0 2374 buffer, RC16_LEN, &sshdr,
0610959f 2375 SD_TIMEOUT, sdkp->max_retries, NULL);
1da177e4 2376
ea73a9f2 2377 if (media_not_present(sdkp, &sshdr))
0da205e0 2378 return -ENODEV;
1da177e4 2379
ced202f7 2380 if (the_result > 0) {
ea73a9f2 2381 sense_valid = scsi_sense_valid(&sshdr);
2b301307
MW		 2382 if (sense_valid &&
2383 sshdr.sense_key == ILLEGAL_REQUEST &&
2384 (sshdr.asc == 0x20 || sshdr.asc == 0x24) &&
2385 sshdr.ascq == 0x00)
2386 /* Invalid Command Operation Code or
2387 * Invalid Field in CDB, just retry
2388 * silently with RC10 */
2389 return -EINVAL;
3233ac19
JB		 2390 if (sense_valid &&
2391 sshdr.sense_key == UNIT_ATTENTION &&
2392 sshdr.asc == 0x29 && sshdr.ascq == 0x00)
2393 /* Device reset might occur several times,
2394 * give it one more chance */
2395 if (--reset_retries > 0)
2396 continue;
2b301307 2397 }
1da177e4
LT		 2398 retries--;
2399
2400 } while (the_result && retries);
2401
0da205e0 2402 if (the_result) {
ef61329d 2403 sd_print_result(sdkp, "Read Capacity(16) failed", the_result);
0da205e0
MW		 2404 read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result);
2405 return -EINVAL;
2406 }
e73aec82 2407
8f76d151
DH		 2408 sector_size = get_unaligned_be32(&buffer[8]);
2409 lba = get_unaligned_be64(&buffer[0]);
0da205e0 2410
fe542396
MP		 2411 if (sd_read_protection_type(sdkp, buffer) < 0) {
2412 sdkp->capacity = 0;
2413 return -ENODEV;
2414 }
0da205e0 2415
ea09bcc9 2416 /* Logical blocks per physical block exponent */
526f7c79 2417 sdkp->physical_block_size = (1 << (buffer[13] & 0xf)) * sector_size;
ea09bcc9 2418
89d94756
HR		 2419 /* RC basis */
2420 sdkp->rc_basis = (buffer[12] >> 4) & 0x3;
2421
ea09bcc9
MP		 2422 /* Lowest aligned logical block */
2423 alignment = ((buffer[14] & 0x3f) << 8 | buffer[15]) * sector_size;
2424 blk_queue_alignment_offset(sdp->request_queue, alignment);
2425 if (alignment && sdkp->first_scan)
2426 sd_printk(KERN_NOTICE, sdkp,
2427 "physical block alignment offset: %u\n", alignment);
2428
c98a0eb0
MP		 2429 if (buffer[14] & 0x80) { /* LBPME */
2430 sdkp->lbpme = 1;
e339c1a7 2431
c98a0eb0
MP		 2432 if (buffer[14] & 0x40) /* LBPRZ */
2433 sdkp->lbprz = 1;
e339c1a7 2434
c98a0eb0 2435 sd_config_discard(sdkp, SD_LBP_WS16);
e339c1a7
MP		 2436 }
2437
0da205e0
MW		 2438 sdkp->capacity = lba + 1;
2439 return sector_size;
2440}
2441
2442static int read_capacity_10(struct scsi_disk *sdkp, struct scsi_device *sdp,
2443 unsigned char *buffer)
2444{
2445 unsigned char cmd[16];
2446 struct scsi_sense_hdr sshdr;
2447 int sense_valid = 0;
2448 int the_result;
3233ac19 2449 int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET;
0da205e0
MW		 2450 sector_t lba;
2451 unsigned sector_size;
2452
2453 do {
2454 cmd[0] = READ_CAPACITY;
2455 memset(&cmd[1], 0, 9);
2456 memset(buffer, 0, 8);
2457
2458 the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE,
2459 buffer, 8, &sshdr,
0610959f 2460 SD_TIMEOUT, sdkp->max_retries, NULL);
0da205e0
MW		 2461
2462 if (media_not_present(sdkp, &sshdr))
2463 return -ENODEV;
2464
ced202f7 2465 if (the_result > 0) {
0da205e0 2466 sense_valid = scsi_sense_valid(&sshdr);
3233ac19
JB		 2467 if (sense_valid &&
2468 sshdr.sense_key == UNIT_ATTENTION &&
2469 sshdr.asc == 0x29 && sshdr.ascq == 0x00)
2470 /* Device reset might occur several times,
2471 * give it one more chance */
2472 if (--reset_retries > 0)
2473 continue;
2474 }
0da205e0
MW		 2475 retries--;
2476
2477 } while (the_result && retries);
2478
2479 if (the_result) {
ef61329d 2480 sd_print_result(sdkp, "Read Capacity(10) failed", the_result);
0da205e0
MW		 2481 read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result);
2482 return -EINVAL;
2483 }
2484
8f76d151
DH		 2485 sector_size = get_unaligned_be32(&buffer[4]);
2486 lba = get_unaligned_be32(&buffer[0]);
0da205e0 2487
5ce524bd
HG		 2488 if (sdp->no_read_capacity_16 && (lba == 0xffffffff)) {
2489 /* Some buggy (usb cardreader) devices return an lba of
2490 0xffffffff when the want to report a size of 0 (with
2491 which they really mean no media is present) */
2492 sdkp->capacity = 0;
5cc10350 2493 sdkp->physical_block_size = sector_size;
5ce524bd
HG		 2494 return sector_size;
2495 }
2496
0da205e0 2497 sdkp->capacity = lba + 1;
526f7c79 2498 sdkp->physical_block_size = sector_size;
0da205e0
MW		 2499 return sector_size;
2500}
2501
2b301307
MW		 2502static int sd_try_rc16_first(struct scsi_device *sdp)
2503{
f87146bb
HR		 2504 if (sdp->host->max_cmd_len < 16)
2505 return 0;
6a0bdffa
AS		 2506 if (sdp->try_rc_10_first)
2507 return 0;
2b301307
MW		 2508 if (sdp->scsi_level > SCSI_SPC_2)
2509 return 1;
2510 if (scsi_device_protection(sdp))
2511 return 1;
2512 return 0;
2513}
2514
0da205e0
MW		 2515/*
2516 * read disk capacity
2517 */
2518static void
2519sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer)
2520{
2521 int sector_size;
2522 struct scsi_device *sdp = sdkp->device;
2523
2b301307 2524 if (sd_try_rc16_first(sdp)) {
0da205e0
MW		 2525 sector_size = read_capacity_16(sdkp, sdp, buffer);
2526 if (sector_size == -EOVERFLOW)
1da177e4 2527 goto got_data;
2b301307
MW		 2528 if (sector_size == -ENODEV)
2529 return;
2530 if (sector_size < 0)
2531 sector_size = read_capacity_10(sdkp, sdp, buffer);
0da205e0
MW		 2532 if (sector_size < 0)
2533 return;
1da177e4 2534 } else {
0da205e0
MW		 2535 sector_size = read_capacity_10(sdkp, sdp, buffer);
2536 if (sector_size == -EOVERFLOW)
2537 goto got_data;
2538 if (sector_size < 0)
2539 return;
2540 if ((sizeof(sdkp->capacity) > 4) &&
2541 (sdkp->capacity > 0xffffffffULL)) {
2542 int old_sector_size = sector_size;
2543 sd_printk(KERN_NOTICE, sdkp, "Very big device. "
2544 "Trying to use READ CAPACITY(16).\n");
2545 sector_size = read_capacity_16(sdkp, sdp, buffer);
2546 if (sector_size < 0) {
2547 sd_printk(KERN_NOTICE, sdkp,
2548 "Using 0xffffffff as device size\n");
2549 sdkp->capacity = 1 + (sector_t) 0xffffffff;
2550 sector_size = old_sector_size;
2551 goto got_data;
2552 }
597d7400
MP		 2553 /* Remember that READ CAPACITY(16) succeeded */
2554 sdp->try_rc_10_first = 0;
0da205e0
MW		 2555 }
2556 }
1da177e4 2557
5c211caa
AS		 2558 /* Some devices are known to return the total number of blocks,
2559 * not the highest block number. Some devices have versions
2560 * which do this and others which do not. Some devices we might
2561 * suspect of doing this but we don't know for certain.
2562 *
2563 * If we know the reported capacity is wrong, decrement it. If
2564 * we can only guess, then assume the number of blocks is even
2565 * (usually true but not always) and err on the side of lowering
2566 * the capacity.
2567 */
2568 if (sdp->fix_capacity ||
2569 (sdp->guess_capacity && (sdkp->capacity & 0x01))) {
2570 sd_printk(KERN_INFO, sdkp, "Adjusting the sector count "
2571 "from its reported value: %llu\n",
2572 (unsigned long long) sdkp->capacity);
1da177e4 2573 --sdkp->capacity;
61bf54b7
ON		 2574 }
2575
1da177e4
LT		 2576got_data:
2577 if (sector_size == 0) {
2578 sector_size = 512;
e73aec82
MP		 2579 sd_printk(KERN_NOTICE, sdkp, "Sector size 0 reported, "
2580 "assuming 512.\n");
1da177e4
LT		 2581 }
2582
2583 if (sector_size != 512 &&
2584 sector_size != 1024 &&
2585 sector_size != 2048 &&
74856fbf 2586 sector_size != 4096) {
e73aec82
MP		 2587 sd_printk(KERN_NOTICE, sdkp, "Unsupported sector size %d.\n",
2588 sector_size);
1da177e4
LT		 2589 /*
2590 * The user might want to re-format the drive with
2591 * a supported sectorsize. Once this happens, it
2592 * would be relatively trivial to set the thing up.
2593 * For this reason, we leave the thing in the table.
2594 */
2595 sdkp->capacity = 0;
2596 /*
2597 * set a bogus sector size so the normal read/write
2598 * logic in the block layer will eventually refuse any
2599 * request on this device without tripping over power
2600 * of two sector size assumptions
2601 */
2602 sector_size = 512;
2603 }
e1defc4f 2604 blk_queue_logical_block_size(sdp->request_queue, sector_size);
89d94756
HR		 2605 blk_queue_physical_block_size(sdp->request_queue,
2606 sdkp->physical_block_size);
2607 sdkp->device->sector_size = sector_size;
7404ad3b 2608
89d94756
HR		 2609 if (sdkp->capacity > 0xffffffff)
2610 sdp->use_16_for_rw = 1;
1da177e4 2611
89d94756 2612}
1da177e4 2613
89d94756
HR		 2614/*
2615 * Print disk capacity
2616 */
2617static void
2618sd_print_capacity(struct scsi_disk *sdkp,
2619 sector_t old_capacity)
2620{
2621 int sector_size = sdkp->device->sector_size;
2622 char cap_str_2[10], cap_str_10[10];
ea09bcc9 2623
d7e6db20
DLM		 2624 if (!sdkp->first_scan && old_capacity == sdkp->capacity)
2625 return;
2626
89d94756
HR		 2627 string_get_size(sdkp->capacity, sector_size,
2628 STRING_UNITS_2, cap_str_2, sizeof(cap_str_2));
2629 string_get_size(sdkp->capacity, sector_size,
d7e6db20 2630 STRING_UNITS_10, cap_str_10, sizeof(cap_str_10));
1da177e4 2631
d7e6db20
DLM		 2632 sd_printk(KERN_NOTICE, sdkp,
2633 "%llu %d-byte logical blocks: (%s/%s)\n",
2634 (unsigned long long)sdkp->capacity,
2635 sector_size, cap_str_10, cap_str_2);
53ad570b 2636
d7e6db20
DLM		 2637 if (sdkp->physical_block_size != sector_size)
2638 sd_printk(KERN_NOTICE, sdkp,
2639 "%u-byte physical blocks\n",
2640 sdkp->physical_block_size);
1da177e4
LT		 2641}
2642
2643/* called with buffer of length 512 */
2644static inline int
0610959f 2645sd_do_mode_sense(struct scsi_disk *sdkp, int dbd, int modepage,
ea73a9f2
JB		 2646 unsigned char *buffer, int len, struct scsi_mode_data *data,
2647 struct scsi_sense_hdr *sshdr)
1da177e4 2648{
c749301e
DLM		 2649 /*
2650 * If we must use MODE SENSE(10), make sure that the buffer length
2651 * is at least 8 bytes so that the mode sense header fits.
2652 */
2653 if (sdkp->device->use_10_for_ms && len < 8)
2654 len = 8;
2655
0610959f
MC		 2656 return scsi_mode_sense(sdkp->device, dbd, modepage, buffer, len,
2657 SD_TIMEOUT, sdkp->max_retries, data,
ea73a9f2 2658 sshdr);
1da177e4
LT		 2659}
2660
2661/*
2662 * read write protect setting, if possible - called only in sd_revalidate_disk()
48970800 2663 * called with buffer of length SD_BUF_SIZE
1da177e4
LT		 2664 */
2665static void
e73aec82 2666sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer)
ea73a9f2 2667{
1da177e4 2668 int res;
ea73a9f2 2669 struct scsi_device *sdp = sdkp->device;
1da177e4 2670 struct scsi_mode_data data;
70a9b873 2671 int old_wp = sdkp->write_prot;
1da177e4
LT		 2672
2673 set_disk_ro(sdkp->disk, 0);
ea73a9f2 2674 if (sdp->skip_ms_page_3f) {
b2bff6ce 2675 sd_first_printk(KERN_NOTICE, sdkp, "Assuming Write Enabled\n");
1da177e4
LT		 2676 return;
2677 }
2678
ea73a9f2 2679 if (sdp->use_192_bytes_for_3f) {
0610959f 2680 res = sd_do_mode_sense(sdkp, 0, 0x3F, buffer, 192, &data, NULL);
1da177e4
LT		 2681 } else {
2682 /*
2683 * First attempt: ask for all pages (0x3F), but only 4 bytes.
2684 * We have to start carefully: some devices hang if we ask
2685 * for more than is available.
2686 */
0610959f 2687 res = sd_do_mode_sense(sdkp, 0, 0x3F, buffer, 4, &data, NULL);
1da177e4
LT		 2688
2689 /*
2690 * Second attempt: ask for page 0 When only page 0 is
2691 * implemented, a request for page 3F may return Sense Key
2692 * 5: Illegal Request, Sense Code 24: Invalid field in
2693 * CDB.
2694 */
8793613d 2695 if (res < 0)
0610959f 2696 res = sd_do_mode_sense(sdkp, 0, 0, buffer, 4, &data, NULL);
1da177e4
LT		 2697
2698 /*
2699 * Third attempt: ask 255 bytes, as we did earlier.
2700 */
8793613d 2701 if (res < 0)
0610959f 2702 res = sd_do_mode_sense(sdkp, 0, 0x3F, buffer, 255,
ea73a9f2 2703 &data, NULL);
1da177e4
LT		 2704 }
2705
8793613d 2706 if (res < 0) {
b2bff6ce 2707 sd_first_printk(KERN_WARNING, sdkp,
e73aec82 2708 "Test WP failed, assume Write Enabled\n");
1da177e4
LT		 2709 } else {
2710 sdkp->write_prot = ((data.device_specific & 0x80) != 0);
8acf608e 2711 set_disk_ro(sdkp->disk, sdkp->write_prot);
70a9b873
MP		 2712 if (sdkp->first_scan || old_wp != sdkp->write_prot) {
2713 sd_printk(KERN_NOTICE, sdkp, "Write Protect is %s\n",
2714 sdkp->write_prot ? "on" : "off");
df441cc0 2715 sd_printk(KERN_DEBUG, sdkp, "Mode Sense: %4ph\n", buffer);
70a9b873 2716 }
1da177e4
LT		 2717 }
2718}
2719
2720/*
2721 * sd_read_cache_type - called only from sd_revalidate_disk()
48970800 2722 * called with buffer of length SD_BUF_SIZE
1da177e4
LT		 2723 */
2724static void
e73aec82 2725sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer)
631e8a13 2726{
1da177e4 2727 int len = 0, res;
ea73a9f2 2728 struct scsi_device *sdp = sdkp->device;
1da177e4 2729
631e8a13
AV		 2730 int dbd;
2731 int modepage;
0bcaa111 2732 int first_len;
1da177e4
LT		 2733 struct scsi_mode_data data;
2734 struct scsi_sense_hdr sshdr;
70a9b873
MP		 2735 int old_wce = sdkp->WCE;
2736 int old_rcd = sdkp->RCD;
2737 int old_dpofua = sdkp->DPOFUA;
1da177e4 2738
39c60a09
JB		 2739
2740 if (sdkp->cache_override)
2741 return;
2742
0bcaa111
LT		 2743 first_len = 4;
2744 if (sdp->skip_ms_page_8) {
2745 if (sdp->type == TYPE_RBC)
2746 goto defaults;
2747 else {
2748 if (sdp->skip_ms_page_3f)
2749 goto defaults;
2750 modepage = 0x3F;
2751 if (sdp->use_192_bytes_for_3f)
2752 first_len = 192;
2753 dbd = 0;
2754 }
2755 } else if (sdp->type == TYPE_RBC) {
631e8a13
AV		 2756 modepage = 6;
2757 dbd = 8;
2758 } else {
2759 modepage = 8;
2760 dbd = 0;
2761 }
2762
1da177e4 2763 /* cautiously ask */
0610959f 2764 res = sd_do_mode_sense(sdkp, dbd, modepage, buffer, first_len,
0bcaa111 2765 &data, &sshdr);
1da177e4 2766
8793613d 2767 if (res < 0)
1da177e4
LT		 2768 goto bad_sense;
2769
6d73c851
AV		 2770 if (!data.header_length) {
2771 modepage = 6;
0bcaa111 2772 first_len = 0;
b2bff6ce
MP		 2773 sd_first_printk(KERN_ERR, sdkp,
2774 "Missing header in MODE_SENSE response\n");
6d73c851
AV		 2775 }
2776
1da177e4
LT		 2777 /* that went OK, now ask for the proper length */
2778 len = data.length;
2779
2780 /*
2781 * We're only interested in the first three bytes, actually.
2782 * But the data cache page is defined for the first 20.
2783 */
2784 if (len < 3)
2785 goto bad_sense;
0bcaa111 2786 else if (len > SD_BUF_SIZE) {
b2bff6ce 2787 sd_first_printk(KERN_NOTICE, sdkp, "Truncating mode parameter "
0bcaa111
LT		 2788 "data from %d to %d bytes\n", len, SD_BUF_SIZE);
2789 len = SD_BUF_SIZE;
2790 }
2791 if (modepage == 0x3F && sdp->use_192_bytes_for_3f)
2792 len = 192;
1da177e4
LT		 2793
2794 /* Get the data */
0bcaa111 2795 if (len > first_len)
0610959f 2796 res = sd_do_mode_sense(sdkp, dbd, modepage, buffer, len,
0bcaa111 2797 &data, &sshdr);
1da177e4 2798
8793613d 2799 if (!res) {
631e8a13 2800 int offset = data.header_length + data.block_descriptor_length;
1da177e4 2801
0bcaa111
LT		 2802 while (offset < len) {
2803 u8 page_code = buffer[offset] & 0x3F;
2804 u8 spf = buffer[offset] & 0x40;
2805
2806 if (page_code == 8 || page_code == 6) {
2807 /* We're interested only in the first 3 bytes.
2808 */
2809 if (len - offset <= 2) {
b2bff6ce
MP		 2810 sd_first_printk(KERN_ERR, sdkp,
2811 "Incomplete mode parameter "
2812 "data\n");
0bcaa111
LT		 2813 goto defaults;
2814 } else {
2815 modepage = page_code;
2816 goto Page_found;
2817 }
2818 } else {
2819 /* Go to the next page */
2820 if (spf && len - offset > 3)
2821 offset += 4 + (buffer[offset+2] << 8) +
2822 buffer[offset+3];
2823 else if (!spf && len - offset > 1)
2824 offset += 2 + buffer[offset+1];
2825 else {
b2bff6ce
MP		 2826 sd_first_printk(KERN_ERR, sdkp,
2827 "Incomplete mode "
2828 "parameter data\n");
0bcaa111
LT		 2829 goto defaults;
2830 }
2831 }
48970800
AV		 2832 }
2833
c4da1205
MK		 2834 sd_first_printk(KERN_WARNING, sdkp,
2835 "No Caching mode page found\n");
984f1733
AS		 2836 goto defaults;
2837
0bcaa111 2838 Page_found:
631e8a13
AV		 2839 if (modepage == 8) {
2840 sdkp->WCE = ((buffer[offset + 2] & 0x04) != 0);
2841 sdkp->RCD = ((buffer[offset + 2] & 0x01) != 0);
2842 } else {
2843 sdkp->WCE = ((buffer[offset + 2] & 0x01) == 0);
2844 sdkp->RCD = 0;
2845 }
1da177e4 2846
007365ad 2847 sdkp->DPOFUA = (data.device_specific & 0x10) != 0;
b14bf2d0
AS		 2848 if (sdp->broken_fua) {
2849 sd_first_printk(KERN_NOTICE, sdkp, "Disabling FUA\n");
2850 sdkp->DPOFUA = 0;
26f28197
DLM		 2851 } else if (sdkp->DPOFUA && !sdkp->device->use_10_for_rw &&
2852 !sdkp->device->use_16_for_rw) {
b2bff6ce 2853 sd_first_printk(KERN_NOTICE, sdkp,
e73aec82 2854 "Uses READ/WRITE(6), disabling FUA\n");
007365ad
TH		 2855 sdkp->DPOFUA = 0;
2856 }
2857
2eefd57b
SRT		 2858 /* No cache flush allowed for write protected devices */
2859 if (sdkp->WCE && sdkp->write_prot)
2860 sdkp->WCE = 0;
2861
70a9b873
MP		 2862 if (sdkp->first_scan || old_wce != sdkp->WCE ||
2863 old_rcd != sdkp->RCD || old_dpofua != sdkp->DPOFUA)
2864 sd_printk(KERN_NOTICE, sdkp,
2865 "Write cache: %s, read cache: %s, %s\n",
2866 sdkp->WCE ? "enabled" : "disabled",
2867 sdkp->RCD ? "disabled" : "enabled",
2868 sdkp->DPOFUA ? "supports DPO and FUA"
2869 : "doesn't support DPO or FUA");
1da177e4
LT		 2870
2871 return;
2872 }
2873
2874bad_sense:
ea73a9f2 2875 if (scsi_sense_valid(&sshdr) &&
1da177e4
LT		 2876 sshdr.sense_key == ILLEGAL_REQUEST &&
2877 sshdr.asc == 0x24 && sshdr.ascq == 0x0)
e73aec82 2878 /* Invalid field in CDB */
b2bff6ce 2879 sd_first_printk(KERN_NOTICE, sdkp, "Cache data unavailable\n");
1da177e4 2880 else
b2bff6ce
MP		 2881 sd_first_printk(KERN_ERR, sdkp,
2882 "Asking for cache data failed\n");
1da177e4
LT		 2883
2884defaults:
b81478d8 2885 if (sdp->wce_default_on) {
b2bff6ce
MP		 2886 sd_first_printk(KERN_NOTICE, sdkp,
2887 "Assuming drive cache: write back\n");
b81478d8
NJ		 2888 sdkp->WCE = 1;
2889 } else {
c4da1205 2890 sd_first_printk(KERN_WARNING, sdkp,
b2bff6ce 2891 "Assuming drive cache: write through\n");
b81478d8
NJ		 2892 sdkp->WCE = 0;
2893 }
1da177e4 2894 sdkp->RCD = 0;
48970800 2895 sdkp->DPOFUA = 0;
1da177e4
LT		 2896}
2897
e0597d70
MP		 2898/*
2899 * The ATO bit indicates whether the DIF application tag is available
2900 * for use by the operating system.
2901 */
439d77f7 2902static void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer)
e0597d70
MP		 2903{
2904 int res, offset;
2905 struct scsi_device *sdp = sdkp->device;
2906 struct scsi_mode_data data;
2907 struct scsi_sense_hdr sshdr;
2908
89d94756 2909 if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC)
e0597d70
MP		 2910 return;
2911
2912 if (sdkp->protection_type == 0)
2913 return;
2914
2915 res = scsi_mode_sense(sdp, 1, 0x0a, buffer, 36, SD_TIMEOUT,
0610959f 2916 sdkp->max_retries, &data, &sshdr);
e0597d70 2917
8793613d 2918 if (res < 0 || !data.header_length ||
e0597d70 2919 data.length < 6) {
b2bff6ce 2920 sd_first_printk(KERN_WARNING, sdkp,
e0597d70
MP		 2921 "getting Control mode page failed, assume no ATO\n");
2922
2923 if (scsi_sense_valid(&sshdr))
2924 sd_print_sense_hdr(sdkp, &sshdr);
2925
2926 return;
2927 }
2928
2929 offset = data.header_length + data.block_descriptor_length;
2930
2931 if ((buffer[offset] & 0x3f) != 0x0a) {
b2bff6ce 2932 sd_first_printk(KERN_ERR, sdkp, "ATO Got wrong page\n");
e0597d70
MP		 2933 return;
2934 }
2935
2936 if ((buffer[offset + 5] & 0x80) == 0)
2937 return;
2938
2939 sdkp->ATO = 1;
2940
2941 return;
2942}
2943
d11b6916
MP		 2944/**
2945 * sd_read_block_limits - Query disk device for preferred I/O sizes.
7529fbb0 2946 * @sdkp: disk to query
d11b6916
MP		 2947 */
2948static void sd_read_block_limits(struct scsi_disk *sdkp)
2949{
2950 unsigned int sector_sz = sdkp->device->sector_size;
bb2d3de1 2951 const int vpd_len = 64;
e3deec09 2952 unsigned char *buffer = kmalloc(vpd_len, GFP_KERNEL);
d11b6916 2953
e3deec09
JB		 2954 if (!buffer ||
2955 /* Block Limits VPD */
2956 scsi_get_vpd_page(sdkp->device, 0xb0, buffer, vpd_len))
2957 goto out;
d11b6916
MP		 2958
2959 blk_queue_io_min(sdkp->disk->queue,
2960 get_unaligned_be16(&buffer[6]) * sector_sz);
ca369d51
MP		 2961
2962 sdkp->max_xfer_blocks = get_unaligned_be32(&buffer[8]);
2963 sdkp->opt_xfer_blocks = get_unaligned_be32(&buffer[12]);
d11b6916 2964
c98a0eb0
MP		 2965 if (buffer[3] == 0x3c) {
2966 unsigned int lba_count, desc_count;
e339c1a7 2967
5db44863 2968 sdkp->max_ws_blocks = (u32)get_unaligned_be64(&buffer[36]);
e339c1a7 2969
c98a0eb0 2970 if (!sdkp->lbpme)
045d3fe7 2971 goto out;
045d3fe7 2972
c98a0eb0
MP		 2973 lba_count = get_unaligned_be32(&buffer[20]);
2974 desc_count = get_unaligned_be32(&buffer[24]);
045d3fe7 2975
c98a0eb0
MP		 2976 if (lba_count && desc_count)
2977 sdkp->max_unmap_blocks = lba_count;
e339c1a7 2978
c98a0eb0 2979 sdkp->unmap_granularity = get_unaligned_be32(&buffer[28]);
e339c1a7
MP		 2980
2981 if (buffer[32] & 0x80)
c98a0eb0 2982 sdkp->unmap_alignment =
e339c1a7 2983 get_unaligned_be32(&buffer[32]) & ~(1 << 31);
c98a0eb0
MP		 2984
2985 if (!sdkp->lbpvpd) { /* LBP VPD page not provided */
2986
2987 if (sdkp->max_unmap_blocks)
2988 sd_config_discard(sdkp, SD_LBP_UNMAP);
2989 else
2990 sd_config_discard(sdkp, SD_LBP_WS16);
2991
2992 } else { /* LBP VPD page tells us what to use */
bcd069bb 2993 if (sdkp->lbpu && sdkp->max_unmap_blocks)
e461338b
MP		 2994 sd_config_discard(sdkp, SD_LBP_UNMAP);
2995 else if (sdkp->lbpws)
c98a0eb0
MP		 2996 sd_config_discard(sdkp, SD_LBP_WS16);
2997 else if (sdkp->lbpws10)
2998 sd_config_discard(sdkp, SD_LBP_WS10);
2999 else
3000 sd_config_discard(sdkp, SD_LBP_DISABLE);
3001 }
e339c1a7
MP		 3002 }
3003
e3deec09 3004 out:
d11b6916
MP		 3005 kfree(buffer);
3006}
3007
3821d768
MP		 3008/**
3009 * sd_read_block_characteristics - Query block dev. characteristics
7529fbb0 3010 * @sdkp: disk to query
3821d768
MP		 3011 */
3012static void sd_read_block_characteristics(struct scsi_disk *sdkp)
3013{
89d94756 3014 struct request_queue *q = sdkp->disk->queue;
e3deec09 3015 unsigned char *buffer;
3821d768 3016 u16 rot;
bb2d3de1 3017 const int vpd_len = 64;
3821d768 3018
e3deec09 3019 buffer = kmalloc(vpd_len, GFP_KERNEL);
3821d768 3020
e3deec09
JB		 3021 if (!buffer ||
3022 /* Block Device Characteristics VPD */
3023 scsi_get_vpd_page(sdkp->device, 0xb1, buffer, vpd_len))
3024 goto out;
3821d768
MP		 3025
3026 rot = get_unaligned_be16(&buffer[4]);
3027
b277da0a 3028 if (rot == 1) {
8b904b5b
BVA		 3029 blk_queue_flag_set(QUEUE_FLAG_NONROT, q);
3030 blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, q);
b277da0a 3031 }
3821d768 3032
68af412c
DLM		 3033 if (sdkp->device->type == TYPE_ZBC) {
3034 /* Host-managed */
27ba3e8f 3035 blk_queue_set_zoned(sdkp->disk, BLK_ZONED_HM);
68af412c
DLM		 3036 } else {
3037 sdkp->zoned = (buffer[8] >> 4) & 3;
27ba3e8f 3038 if (sdkp->zoned == 1) {
68af412c 3039 /* Host-aware */
27ba3e8f 3040 blk_queue_set_zoned(sdkp->disk, BLK_ZONED_HA);
b7205307 3041 } else {
27ba3e8f
DLM		 3042 /* Regular disk or drive managed disk */
3043 blk_queue_set_zoned(sdkp->disk, BLK_ZONED_NONE);
b7205307 3044 }
68af412c 3045 }
27ba3e8f
DLM		 3046
3047 if (!sdkp->first_scan)
3048 goto out;
3049
3050 if (blk_queue_is_zoned(q)) {
89d94756
HR		 3051 sd_printk(KERN_NOTICE, sdkp, "Host-%s zoned block device\n",
3052 q->limits.zoned == BLK_ZONED_HM ? "managed" : "aware");
27ba3e8f
DLM		 3053 } else {
3054 if (sdkp->zoned == 1)
3055 sd_printk(KERN_NOTICE, sdkp,
3056 "Host-aware SMR disk used as regular disk\n");
3057 else if (sdkp->zoned == 2)
3058 sd_printk(KERN_NOTICE, sdkp,
3059 "Drive-managed SMR disk\n");
3060 }
89d94756 3061
e3deec09 3062 out:
3821d768
MP		 3063 kfree(buffer);
3064}
3065
045d3fe7 3066/**
c98a0eb0 3067 * sd_read_block_provisioning - Query provisioning VPD page
7529fbb0 3068 * @sdkp: disk to query
045d3fe7 3069 */
c98a0eb0 3070static void sd_read_block_provisioning(struct scsi_disk *sdkp)
045d3fe7
MP		 3071{
3072 unsigned char *buffer;
3073 const int vpd_len = 8;
3074
c98a0eb0 3075 if (sdkp->lbpme == 0)
045d3fe7
MP		 3076 return;
3077
3078 buffer = kmalloc(vpd_len, GFP_KERNEL);
3079
3080 if (!buffer || scsi_get_vpd_page(sdkp->device, 0xb2, buffer, vpd_len))
3081 goto out;
3082
c98a0eb0
MP		 3083 sdkp->lbpvpd = 1;
3084 sdkp->lbpu = (buffer[5] >> 7) & 1; /* UNMAP */
3085 sdkp->lbpws = (buffer[5] >> 6) & 1; /* WRITE SAME(16) with UNMAP */
3086 sdkp->lbpws10 = (buffer[5] >> 5) & 1; /* WRITE SAME(10) with UNMAP */
045d3fe7
MP		 3087
3088 out:
3089 kfree(buffer);
3090}
3091
5db44863
MP		 3092static void sd_read_write_same(struct scsi_disk *sdkp, unsigned char *buffer)
3093{
66c28f97
MP		 3094 struct scsi_device *sdev = sdkp->device;
3095
54b2b50c
MP		 3096 if (sdev->host->no_write_same) {
3097 sdev->no_write_same = 1;
3098
3099 return;
3100 }
3101
66c28f97 3102 if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, INQUIRY) < 0) {
af73623f
BS		 3103 /* too large values might cause issues with arcmsr */
3104 int vpd_buf_len = 64;
3105
66c28f97
MP		 3106 sdev->no_report_opcodes = 1;
3107
3108 /* Disable WRITE SAME if REPORT SUPPORTED OPERATION
3109 * CODES is unsupported and the device has an ATA
3110 * Information VPD page (SAT).
3111 */
af73623f 3112 if (!scsi_get_vpd_page(sdev, 0x89, buffer, vpd_buf_len))
66c28f97
MP		 3113 sdev->no_write_same = 1;
3114 }
3115
3116 if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME_16) == 1)
5db44863 3117 sdkp->ws16 = 1;
66c28f97
MP		 3118
3119 if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME) == 1)
3120 sdkp->ws10 = 1;
5db44863
MP		 3121}
3122
d80210f2
CH		 3123static void sd_read_security(struct scsi_disk *sdkp, unsigned char *buffer)
3124{
3125 struct scsi_device *sdev = sdkp->device;
3126
3127 if (!sdev->security_supported)
3128 return;
3129
3130 if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE,
3131 SECURITY_PROTOCOL_IN) == 1 &&
3132 scsi_report_opcode(sdev, buffer, SD_BUF_SIZE,
3133 SECURITY_PROTOCOL_OUT) == 1)
3134 sdkp->security = 1;
3135}
3136
e815d365
DLM		 3137static inline sector_t sd64_to_sectors(struct scsi_disk *sdkp, u8 *buf)
3138{
3139 return logical_to_sectors(sdkp->device, get_unaligned_be64(buf));
3140}
3141
3142/**
3143 * sd_read_cpr - Query concurrent positioning ranges
3144 * @sdkp: disk to query
3145 */
3146static void sd_read_cpr(struct scsi_disk *sdkp)
3147{
3148 struct blk_independent_access_ranges *iars = NULL;
3149 unsigned char *buffer = NULL;
3150 unsigned int nr_cpr = 0;
3151 int i, vpd_len, buf_len = SD_BUF_SIZE;
3152 u8 *desc;
3153
3154 /*
3155 * We need to have the capacity set first for the block layer to be
3156 * able to check the ranges.
3157 */
3158 if (sdkp->first_scan)
3159 return;
3160
3161 if (!sdkp->capacity)
3162 goto out;
3163
3164 /*
3165 * Concurrent Positioning Ranges VPD: there can be at most 256 ranges,
3166 * leading to a maximum page size of 64 + 256*32 bytes.
3167 */
3168 buf_len = 64 + 256*32;
3169 buffer = kmalloc(buf_len, GFP_KERNEL);
3170 if (!buffer || scsi_get_vpd_page(sdkp->device, 0xb9, buffer, buf_len))
3171 goto out;
3172
3173 /* We must have at least a 64B header and one 32B range descriptor */
3174 vpd_len = get_unaligned_be16(&buffer[2]) + 3;
3175 if (vpd_len > buf_len || vpd_len < 64 + 32 || (vpd_len & 31)) {
3176 sd_printk(KERN_ERR, sdkp,
3177 "Invalid Concurrent Positioning Ranges VPD page\n");
3178 goto out;
3179 }
3180
3181 nr_cpr = (vpd_len - 64) / 32;
3182 if (nr_cpr == 1) {
3183 nr_cpr = 0;
3184 goto out;
3185 }
3186
3187 iars = disk_alloc_independent_access_ranges(sdkp->disk, nr_cpr);
3188 if (!iars) {
3189 nr_cpr = 0;
3190 goto out;
3191 }
3192
3193 desc = &buffer[64];
3194 for (i = 0; i < nr_cpr; i++, desc += 32) {
3195 if (desc[0] != i) {
3196 sd_printk(KERN_ERR, sdkp,
3197 "Invalid Concurrent Positioning Range number\n");
3198 nr_cpr = 0;
3199 break;
3200 }
3201
3202 iars->ia_range[i].sector = sd64_to_sectors(sdkp, desc + 8);
3203 iars->ia_range[i].nr_sectors = sd64_to_sectors(sdkp, desc + 16);
3204 }
3205
3206out:
3207 disk_set_independent_access_ranges(sdkp->disk, iars);
3208 if (nr_cpr && sdkp->nr_actuators != nr_cpr) {
3209 sd_printk(KERN_NOTICE, sdkp,
3210 "%u concurrent positioning ranges\n", nr_cpr);
3211 sdkp->nr_actuators = nr_cpr;
3212 }
3213
3214 kfree(buffer);
3215}
3216
a83da8a4
MP		 3217/*
3218 * Determine the device's preferred I/O size for reads and writes
3219 * unless the reported value is unreasonably small, large, not a
3220 * multiple of the physical block size, or simply garbage.
3221 */
3222static bool sd_validate_opt_xfer_size(struct scsi_disk *sdkp,
3223 unsigned int dev_max)
3224{
3225 struct scsi_device *sdp = sdkp->device;
3226 unsigned int opt_xfer_bytes =
3227 logical_to_bytes(sdp, sdkp->opt_xfer_blocks);
3228
1d5de5bd
MP		 3229 if (sdkp->opt_xfer_blocks == 0)
3230 return false;
3231
a83da8a4
MP		 3232 if (sdkp->opt_xfer_blocks > dev_max) {
3233 sd_first_printk(KERN_WARNING, sdkp,
3234 "Optimal transfer size %u logical blocks " \
3235 "> dev_max (%u logical blocks)\n",
3236 sdkp->opt_xfer_blocks, dev_max);
3237 return false;
3238 }
3239
3240 if (sdkp->opt_xfer_blocks > SD_DEF_XFER_BLOCKS) {
3241 sd_first_printk(KERN_WARNING, sdkp,
3242 "Optimal transfer size %u logical blocks " \
3243 "> sd driver limit (%u logical blocks)\n",
3244 sdkp->opt_xfer_blocks, SD_DEF_XFER_BLOCKS);
3245 return false;
3246 }
3247
3248 if (opt_xfer_bytes < PAGE_SIZE) {
3249 sd_first_printk(KERN_WARNING, sdkp,
3250 "Optimal transfer size %u bytes < " \
3251 "PAGE_SIZE (%u bytes)\n",
3252 opt_xfer_bytes, (unsigned int)PAGE_SIZE);
3253 return false;
3254 }
3255
3256 if (opt_xfer_bytes & (sdkp->physical_block_size - 1)) {
3257 sd_first_printk(KERN_WARNING, sdkp,
3258 "Optimal transfer size %u bytes not a " \
3259 "multiple of physical block size (%u bytes)\n",
3260 opt_xfer_bytes, sdkp->physical_block_size);
3261 return false;
3262 }
3263
3264 sd_first_printk(KERN_INFO, sdkp, "Optimal transfer size %u bytes\n",
3265 opt_xfer_bytes);
3266 return true;
3267}
3268
1da177e4
LT		 3269/**
3270 * sd_revalidate_disk - called the first time a new disk is seen,
3271 * performs disk spin up, read_capacity, etc.
3272 * @disk: struct gendisk we care about
3273 **/
3274static int sd_revalidate_disk(struct gendisk *disk)
3275{
3276 struct scsi_disk *sdkp = scsi_disk(disk);
3277 struct scsi_device *sdp = sdkp->device;
ca369d51 3278 struct request_queue *q = sdkp->disk->queue;
89d94756 3279 sector_t old_capacity = sdkp->capacity;
1da177e4 3280 unsigned char *buffer;
ca369d51 3281 unsigned int dev_max, rw_max;
1da177e4 3282
fa0d34be
MP		 3283 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp,
3284 "sd_revalidate_disk\n"));
1da177e4
LT		 3285
3286 /*
3287 * If the device is offline, don't try and read capacity or any
3288 * of the other niceties.
3289 */
3290 if (!scsi_device_online(sdp))
3291 goto out;
3292
a6123f14 3293 buffer = kmalloc(SD_BUF_SIZE, GFP_KERNEL);
1da177e4 3294 if (!buffer) {
e73aec82
MP		 3295 sd_printk(KERN_WARNING, sdkp, "sd_revalidate_disk: Memory "
3296 "allocation failure.\n");
ea73a9f2 3297 goto out;
1da177e4
LT		 3298 }
3299
e73aec82 3300 sd_spinup_disk(sdkp);
1da177e4
LT		 3301
3302 /*
3303 * Without media there is no reason to ask; moreover, some devices
3304 * react badly if we do.
3305 */
3306 if (sdkp->media_present) {
e73aec82 3307 sd_read_capacity(sdkp, buffer);
ffd4bc2a 3308
e4a05698
JB		 3309 /*
3310 * set the default to rotational. All non-rotational devices
3311 * support the block characteristics VPD page, which will
3312 * cause this to be updated correctly and any device which
3313 * doesn't support it should be treated as rotational.
3314 */
3315 blk_queue_flag_clear(QUEUE_FLAG_NONROT, q);
3316 blk_queue_flag_set(QUEUE_FLAG_ADD_RANDOM, q);
3317
5ddfe085 3318 if (scsi_device_supports_vpd(sdp)) {
c98a0eb0 3319 sd_read_block_provisioning(sdkp);
ffd4bc2a
MP		 3320 sd_read_block_limits(sdkp);
3321 sd_read_block_characteristics(sdkp);
89d94756 3322 sd_zbc_read_zones(sdkp, buffer);
ffd4bc2a
MP		 3323 }
3324
89d94756
HR		 3325 sd_print_capacity(sdkp, old_capacity);
3326
e73aec82
MP		 3327 sd_read_write_protect_flag(sdkp, buffer);
3328 sd_read_cache_type(sdkp, buffer);
e0597d70 3329 sd_read_app_tag_own(sdkp, buffer);
5db44863 3330 sd_read_write_same(sdkp, buffer);
d80210f2 3331 sd_read_security(sdkp, buffer);
e815d365 3332 sd_read_cpr(sdkp);
1da177e4 3333 }
461d4e90
TH		 3334
3335 /*
3336 * We now have all cache related info, determine how we deal
4913efe4 3337 * with flush requests.
461d4e90 3338 */
cb2fb68d 3339 sd_set_flush_flag(sdkp);
461d4e90 3340
ca369d51
MP		 3341 /* Initial block count limit based on CDB TRANSFER LENGTH field size. */
3342 dev_max = sdp->use_16_for_rw ? SD_MAX_XFER_BLOCKS : SD_DEF_XFER_BLOCKS;
3343
3344 /* Some devices report a maximum block count for READ/WRITE requests. */
3345 dev_max = min_not_zero(dev_max, sdkp->max_xfer_blocks);
3346 q->limits.max_dev_sectors = logical_to_sectors(sdp, dev_max);
3347
a83da8a4 3348 if (sd_validate_opt_xfer_size(sdkp, dev_max)) {
6b7e9cde
MP		 3349 q->limits.io_opt = logical_to_bytes(sdp, sdkp->opt_xfer_blocks);
3350 rw_max = logical_to_sectors(sdp, sdkp->opt_xfer_blocks);
ea697a8b
MP		 3351 } else {
3352 q->limits.io_opt = 0;
67804145
FZ		 3353 rw_max = min_not_zero(logical_to_sectors(sdp, dev_max),
3354 (sector_t)BLK_DEF_MAX_SECTORS);
ea697a8b 3355 }
3a9794d3 3356
77082ca5
MP		 3357 /* Do not exceed controller limit */
3358 rw_max = min(rw_max, queue_max_hw_sectors(q));
3359
3360 /*
3361 * Only update max_sectors if previously unset or if the current value
3362 * exceeds the capabilities of the hardware.
3363 */
3364 if (sdkp->first_scan ||
3365 q->limits.max_sectors > q->limits.max_dev_sectors ||
3366 q->limits.max_sectors > q->limits.max_hw_sectors)
3367 q->limits.max_sectors = rw_max;
3368
3369 sdkp->first_scan = 0;
4f258a46 3370
449f4ec9 3371 set_capacity_and_notify(disk, logical_to_sectors(sdp, sdkp->capacity));
5db44863 3372 sd_config_write_same(sdkp);
1da177e4
LT		 3373 kfree(buffer);
3374
a3d8a257
DLM		 3375 /*
3376 * For a zoned drive, revalidating the zones can be done only once
3377 * the gendisk capacity is set. So if this fails, set back the gendisk
3378 * capacity to 0.
3379 */
3380 if (sd_zbc_revalidate_zones(sdkp))
449f4ec9 3381 set_capacity_and_notify(disk, 0);
a3d8a257 3382
1da177e4
LT		 3383 out:
3384 return 0;
3385}
3386
72ec24bd
TH		 3387/**
3388 * sd_unlock_native_capacity - unlock native capacity
3389 * @disk: struct gendisk to set capacity for
3390 *
3391 * Block layer calls this function if it detects that partitions
3392 * on @disk reach beyond the end of the device. If the SCSI host
3393 * implements ->unlock_native_capacity() method, it's invoked to
3394 * give it a chance to adjust the device capacity.
3395 *
3396 * CONTEXT:
3397 * Defined by block layer. Might sleep.
3398 */
3399static void sd_unlock_native_capacity(struct gendisk *disk)
3400{
3401 struct scsi_device *sdev = scsi_disk(disk)->device;
3402
3403 if (sdev->host->hostt->unlock_native_capacity)
3404 sdev->host->hostt->unlock_native_capacity(sdev);
3405}
3406
3e1a7ff8
TH		 3407/**
3408 * sd_format_disk_name - format disk name
3409 * @prefix: name prefix - ie. "sd" for SCSI disks
3410 * @index: index of the disk to format name for
3411 * @buf: output buffer
3412 * @buflen: length of the output buffer
3413 *
3414 * SCSI disk names starts at sda. The 26th device is sdz and the
3415 * 27th is sdaa. The last one for two lettered suffix is sdzz
3416 * which is followed by sdaaa.
3417 *
3418 * This is basically 26 base counting with one extra 'nil' entry
3ad2f3fb 3419 * at the beginning from the second digit on and can be
3e1a7ff8
TH		 3420 * determined using similar method as 26 base conversion with the
3421 * index shifted -1 after each digit is computed.
3422 *
3423 * CONTEXT:
3424 * Don't care.
3425 *
3426 * RETURNS:
3427 * 0 on success, -errno on failure.
3428 */
3429static int sd_format_disk_name(char *prefix, int index, char *buf, int buflen)
3430{
3431 const int base = 'z' - 'a' + 1;
3432 char *begin = buf + strlen(prefix);
3433 char *end = buf + buflen;
3434 char *p;
3435 int unit;
3436
3437 p = end - 1;
3438 *p = '\0';
3439 unit = base;
3440 do {
3441 if (p == begin)
3442 return -EINVAL;
3443 *--p = 'a' + (index % unit);
3444 index = (index / unit) - 1;
3445 } while (index >= 0);
3446
3447 memmove(begin, p, end - p);
3448 memcpy(buf, prefix, strlen(prefix));
3449
3450 return 0;
3451}
3452
1da177e4
LT		 3453/**
3454 * sd_probe - called during driver initialization and whenever a
3455 * new scsi device is attached to the system. It is called once
3456 * for each scsi device (not just disks) present.
3457 * @dev: pointer to device object
3458 *
3459 * Returns 0 if successful (or not interested in this scsi device
3460 * (e.g. scanner)); 1 when there is an error.
3461 *
3462 * Note: this function is invoked from the scsi mid-level.
3463 * This function sets up the mapping between a given
3464 * <host,channel,id,lun> (found in sdp) and new device name
3465 * (e.g. /dev/sda). More precisely it is the block device major
3466 * and minor number that is chosen here.
3467 *
2db93ce8
PU		 3468 * Assume sd_probe is not re-entrant (for time being)
3469 * Also think about sd_probe() and sd_remove() running coincidentally.
1da177e4
LT		 3470 **/
3471static int sd_probe(struct device *dev)
3472{
3473 struct scsi_device *sdp = to_scsi_device(dev);
3474 struct scsi_disk *sdkp;
3475 struct gendisk *gd;
439d77f7 3476 int index;
1da177e4
LT		 3477 int error;
3478
6fe8c1db 3479 scsi_autopm_get_device(sdp);
1da177e4 3480 error = -ENODEV;
89d94756
HR		 3481 if (sdp->type != TYPE_DISK &&
3482 sdp->type != TYPE_ZBC &&
3483 sdp->type != TYPE_MOD &&
3484 sdp->type != TYPE_RBC)
1da177e4
LT		 3485 goto out;
3486
bf1b4659
DLM		 3487 if (!IS_ENABLED(CONFIG_BLK_DEV_ZONED) && sdp->type == TYPE_ZBC) {
3488 sdev_printk(KERN_WARNING, sdp,
3489 "Unsupported ZBC host-managed device.\n");
89d94756 3490 goto out;
bf1b4659
DLM		 3491 }
3492
9ccfc756 3493 SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO, sdp,
2db93ce8 3494 "sd_probe\n"));
1da177e4
LT		 3495
3496 error = -ENOMEM;
24669f75 3497 sdkp = kzalloc(sizeof(*sdkp), GFP_KERNEL);
1da177e4
LT		 3498 if (!sdkp)
3499 goto out;
3500
4a1fa41d
CH		 3501 gd = __alloc_disk_node(sdp->request_queue, NUMA_NO_NODE,
3502 &sd_bio_compl_lkclass);
1da177e4 3503 if (!gd)
c01228db 3504 goto out_free;
1da177e4 3505
94015080
MW		 3506 index = ida_alloc(&sd_index_ida, GFP_KERNEL);
3507 if (index < 0) {
21208ae5 3508 sdev_printk(KERN_WARNING, sdp, "sd_probe: memory exhausted.\n");
1da177e4 3509 goto out_put;
1a03ae0f
MR		 3510 }
3511
3e1a7ff8 3512 error = sd_format_disk_name("sd", index, gd->disk_name, DISK_NAME_LEN);
21208ae5
DK		 3513 if (error) {
3514 sdev_printk(KERN_WARNING, sdp, "SCSI disk (sd) name length exceeded.\n");
f27bac27 3515 goto out_free_index;
21208ae5 3516 }
f27bac27 3517
1da177e4
LT		 3518 sdkp->device = sdp;
3519 sdkp->driver = &sd_template;
3520 sdkp->disk = gd;
3521 sdkp->index = index;
0610959f 3522 sdkp->max_retries = SD_MAX_RETRIES;
409f3499 3523 atomic_set(&sdkp->openers, 0);
9e1a1537 3524 atomic_set(&sdkp->device->ioerr_cnt, 0);
1da177e4 3525
601e7638
JB		 3526 if (!sdp->request_queue->rq_timeout) {
3527 if (sdp->type != TYPE_MOD)
3528 blk_queue_rq_timeout(sdp->request_queue, SD_TIMEOUT);
3529 else
3530 blk_queue_rq_timeout(sdp->request_queue,
3531 SD_MOD_TIMEOUT);
3532 }
3533
3534 device_initialize(&sdkp->dev);
265dfe8e 3535 sdkp->dev.parent = get_device(dev);
601e7638 3536 sdkp->dev.class = &sd_disk_class;
02aa2a37 3537 dev_set_name(&sdkp->dev, "%s", dev_name(dev));
601e7638 3538
dee0586e 3539 error = device_add(&sdkp->dev);
265dfe8e
ML		 3540 if (error) {
3541 put_device(&sdkp->dev);
3542 goto out;
3543 }
601e7638 3544
478a8a05 3545 dev_set_drvdata(dev, sdkp);
601e7638 3546
82a54da6
BVA		 3547 gd->major = sd_major((index & 0xf0) >> 4);
3548 gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00);
a58bd768 3549 gd->minors = SD_MINORS;
82a54da6
BVA		 3550
3551 gd->fops = &sd_fops;
3552 gd->private_data = &sdkp->driver;
82a54da6
BVA		 3553
3554 /* defaults, until the device tells us otherwise */
3555 sdp->sector_size = 512;
3556 sdkp->capacity = 0;
3557 sdkp->media_present = 1;
3558 sdkp->write_prot = 0;
3559 sdkp->cache_override = 0;
3560 sdkp->WCE = 0;
3561 sdkp->RCD = 0;
3562 sdkp->ATO = 0;
3563 sdkp->first_scan = 1;
3564 sdkp->max_medium_access_timeouts = SD_MAX_MEDIUM_TIMEOUTS;
3565
3566 sd_revalidate_disk(gd);
3567
82a54da6
BVA		 3568 if (sdp->removable) {
3569 gd->flags |= GENHD_FL_REMOVABLE;
3570 gd->events |= DISK_EVENT_MEDIA_CHANGE;
3571 gd->event_flags = DISK_EVENT_FLAG_POLL | DISK_EVENT_FLAG_UEVENT;
3572 }
3573
3574 blk_pm_runtime_init(sdp->request_queue, dev);
c74f8056
SC		 3575 if (sdp->rpm_autosuspend) {
3576 pm_runtime_set_autosuspend_delay(dev,
3577 sdp->host->hostt->rpm_autosuspend_delay);
3578 }
2a7a891f
LC		 3579
3580 error = device_add_disk(dev, gd, NULL);
3581 if (error) {
3582 put_device(&sdkp->dev);
3583 goto out;
3584 }
3585
82a54da6
BVA		 3586 if (sdkp->capacity)
3587 sd_dif_config_host(sdkp);
3588
3589 sd_revalidate_disk(gd);
3590
3591 if (sdkp->security) {
0610959f 3592 sdkp->opal_dev = init_opal_dev(sdkp, &sd_sec_submit);
82a54da6
BVA		 3593 if (sdkp->opal_dev)
3594 sd_printk(KERN_NOTICE, sdkp, "supports TCG Opal\n");
3595 }
3596
3597 sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n",
3598 sdp->removable ? "removable " : "");
3599 scsi_autopm_put_device(sdp);
1da177e4
LT		 3600
3601 return 0;
3602
f27bac27 3603 out_free_index:
94015080 3604 ida_free(&sd_index_ida, index);
6bdaa1f1 3605 out_put:
1da177e4 3606 put_disk(gd);
f170396c 3607 out_free:
5795eb44 3608 sd_zbc_release_disk(sdkp);
f170396c 3609 kfree(sdkp);
6bdaa1f1 3610 out:
6fe8c1db 3611 scsi_autopm_put_device(sdp);
1da177e4
LT		 3612 return error;
3613}
3614
3615/**
3616 * sd_remove - called whenever a scsi disk (previously recognized by
3617 * sd_probe) is detached from the system. It is called (potentially
3618 * multiple times) during sd module unload.
f2a3313d 3619 * @dev: pointer to device object
1da177e4
LT		 3620 *
3621 * Note: this function is invoked from the scsi mid-level.
3622 * This function potentially frees up a device name (e.g. /dev/sdc)
3623 * that could be re-used by a subsequent sd_probe().
3624 * This function is not called when the built-in sd driver is "exit-ed".
3625 **/
3626static int sd_remove(struct device *dev)
3627{
601e7638 3628 struct scsi_disk *sdkp;
1da177e4 3629
601e7638 3630 sdkp = dev_get_drvdata(dev);
478a8a05
AS		 3631 scsi_autopm_get_device(sdkp->device);
3632
ee959b00 3633 device_del(&sdkp->dev);
1da177e4
LT		 3634 del_gendisk(sdkp->disk);
3635 sd_shutdown(dev);
39b7f1e2 3636
d80210f2
CH		 3637 free_opal_dev(sdkp->opal_dev);
3638
0b950672 3639 mutex_lock(&sd_ref_mutex);
39b7f1e2 3640 dev_set_drvdata(dev, NULL);
ee959b00 3641 put_device(&sdkp->dev);
0b950672 3642 mutex_unlock(&sd_ref_mutex);
1da177e4
LT		 3643
3644 return 0;
3645}
3646
3647/**
3648 * scsi_disk_release - Called to free the scsi_disk structure
ee959b00 3649 * @dev: pointer to embedded class device
1da177e4 3650 *
0b950672 3651 * sd_ref_mutex must be held entering this routine. Because it is
1da177e4
LT		 3652 * called on last put, you should always use the scsi_disk_get()
3653 * scsi_disk_put() helpers which manipulate the semaphore directly
ee959b00 3654 * and never do a direct put_device.
1da177e4 3655 **/
ee959b00 3656static void scsi_disk_release(struct device *dev)
1da177e4 3657{
ee959b00 3658 struct scsi_disk *sdkp = to_scsi_disk(dev);
1da177e4 3659 struct gendisk *disk = sdkp->disk;
c14a5726
BVA		 3660 struct request_queue *q = disk->queue;
3661
94015080 3662 ida_free(&sd_index_ida, sdkp->index);
c01228db 3663
c14a5726
BVA		 3664 /*
3665 * Wait until all requests that are in progress have completed.
3666 * This is necessary to avoid that e.g. scsi_end_request() crashes
3667 * due to clearing the disk->private_data pointer. Wait from inside
3668 * scsi_disk_release() instead of from sd_release() to avoid that
3669 * freezing and unfreezing the request queue affects user space I/O
3670 * in case multiple processes open a /dev/sd... node concurrently.
3671 */
3672 blk_mq_freeze_queue(q);
3673 blk_mq_unfreeze_queue(q);
3674
1da177e4 3675 disk->private_data = NULL;
1da177e4 3676 put_disk(disk);
39b7f1e2 3677 put_device(&sdkp->device->sdev_gendev);
1da177e4 3678
5795eb44
JT		 3679 sd_zbc_release_disk(sdkp);
3680
1da177e4
LT		 3681 kfree(sdkp);
3682}
3683
cc5d2c8c 3684static int sd_start_stop_device(struct scsi_disk *sdkp, int start)
c3c94c5a
TH		 3685{
3686 unsigned char cmd[6] = { START_STOP }; /* START_VALID */
3687 struct scsi_sense_hdr sshdr;
cc5d2c8c 3688 struct scsi_device *sdp = sdkp->device;
c3c94c5a
TH		 3689 int res;
3690
3691 if (start)
3692 cmd[4] |= 1; /* START */
3693
d2886ea3
SR		 3694 if (sdp->start_stop_pwr_cond)
3695 cmd[4] |= start ? 1 << 4 : 3 << 4; /* Active or Standby */
3696
c3c94c5a
TH		 3697 if (!scsi_device_online(sdp))
3698 return -ENODEV;
3699
fcbfffe2 3700 res = scsi_execute(sdp, cmd, DMA_NONE, NULL, 0, NULL, &sshdr,
0610959f 3701 SD_TIMEOUT, sdkp->max_retries, 0, RQF_PM, NULL);
c3c94c5a 3702 if (res) {
ef61329d 3703 sd_print_result(sdkp, "Start/Stop Unit failed", res);
464a00c9 3704 if (res > 0 && scsi_sense_valid(&sshdr)) {
cc5d2c8c 3705 sd_print_sense_hdr(sdkp, &sshdr);
95897910 3706 /* 0x3a is medium not present */
464a00c9
HR		 3707 if (sshdr.asc == 0x3a)
3708 res = 0;
3709 }
c3c94c5a
TH		 3710 }
3711
95897910
ON		 3712 /* SCSI error codes must not go to the generic layer */
3713 if (res)
3714 return -EIO;
3715
3716 return 0;
c3c94c5a
TH		 3717}
3718
1da177e4
LT		 3719/*
3720 * Send a SYNCHRONIZE CACHE instruction down to the device through
3721 * the normal SCSI command structure. Wait for the command to
3722 * complete.
3723 */
3724static void sd_shutdown(struct device *dev)
3725{
3d9a1f53 3726 struct scsi_disk *sdkp = dev_get_drvdata(dev);
1da177e4
LT		 3727
3728 if (!sdkp)
3729 return; /* this can happen */
3730
54f57588 3731 if (pm_runtime_suspended(dev))
3d9a1f53 3732 return;
54f57588 3733
95897910 3734 if (sdkp->WCE && sdkp->media_present) {
e73aec82 3735 sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n");
4fa83244 3736 sd_sync_cache(sdkp, NULL);
39b7f1e2 3737 }
c3c94c5a 3738
cc5d2c8c
JB		 3739 if (system_state != SYSTEM_RESTART && sdkp->device->manage_start_stop) {
3740 sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n");
3741 sd_start_stop_device(sdkp, 0);
c3c94c5a 3742 }
39b7f1e2 3743}
1da177e4 3744
95897910 3745static int sd_suspend_common(struct device *dev, bool ignore_stop_errors)
c3c94c5a 3746{
3d9a1f53 3747 struct scsi_disk *sdkp = dev_get_drvdata(dev);
4fa83244 3748 struct scsi_sense_hdr sshdr;
09ff92fe 3749 int ret = 0;
c3c94c5a 3750
13b43891
AS		 3751 if (!sdkp) /* E.g.: runtime suspend following sd_remove() */
3752 return 0;
c3c94c5a 3753
95897910 3754 if (sdkp->WCE && sdkp->media_present) {
cc5d2c8c 3755 sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n");
4fa83244
DB		 3756 ret = sd_sync_cache(sdkp, &sshdr);
3757
95897910
ON		 3758 if (ret) {
3759 /* ignore OFFLINE device */
3760 if (ret == -ENODEV)
4fa83244
DB		 3761 return 0;
3762
3763 if (!scsi_sense_valid(&sshdr) ||
3764 sshdr.sense_key != ILLEGAL_REQUEST)
3765 return ret;
3766
3767 /*
3768 * sshdr.sense_key == ILLEGAL_REQUEST means this drive
3769 * doesn't support sync. There's not much to do and
3770 * suspend shouldn't fail.
3771 */
ed91f7ed 3772 ret = 0;
95897910 3773 }
c3c94c5a
TH		 3774 }
3775
691e3d31 3776 if (sdkp->device->manage_start_stop) {
cc5d2c8c 3777 sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n");
95897910 3778 /* an error is not worth aborting a system sleep */
cc5d2c8c 3779 ret = sd_start_stop_device(sdkp, 0);
95897910
ON		 3780 if (ignore_stop_errors)
3781 ret = 0;
c3c94c5a
TH		 3782 }
3783
09ff92fe 3784 return ret;
c3c94c5a
TH		 3785}
3786
95897910
ON		 3787static int sd_suspend_system(struct device *dev)
3788{
9131bff6
BVA		 3789 if (pm_runtime_suspended(dev))
3790 return 0;
3791
95897910
ON		 3792 return sd_suspend_common(dev, true);
3793}
3794
3795static int sd_suspend_runtime(struct device *dev)
3796{
3797 return sd_suspend_common(dev, false);
3798}
3799
c3c94c5a
TH		 3800static int sd_resume(struct device *dev)
3801{
3d9a1f53 3802 struct scsi_disk *sdkp = dev_get_drvdata(dev);
d80210f2 3803 int ret;
c3c94c5a 3804
13b43891
AS		 3805 if (!sdkp) /* E.g.: runtime resume at the start of sd_probe() */
3806 return 0;
3807
cc5d2c8c 3808 if (!sdkp->device->manage_start_stop)
3d9a1f53 3809 return 0;
c3c94c5a 3810
cc5d2c8c 3811 sd_printk(KERN_NOTICE, sdkp, "Starting disk\n");
d80210f2
CH		 3812 ret = sd_start_stop_device(sdkp, 1);
3813 if (!ret)
3814 opal_unlock_from_suspend(sdkp->opal_dev);
3815 return ret;
c3c94c5a
TH		 3816}
3817
1c957532
BVA		 3818static int sd_resume_system(struct device *dev)
3819{
9131bff6
BVA		 3820 if (pm_runtime_suspended(dev))
3821 return 0;
3822
1c957532
BVA		 3823 return sd_resume(dev);
3824}
3825
ed4246d3
MK		 3826static int sd_resume_runtime(struct device *dev)
3827{
3828 struct scsi_disk *sdkp = dev_get_drvdata(dev);
85374b63
MC		 3829 struct scsi_device *sdp;
3830
3831 if (!sdkp) /* E.g.: runtime resume at the start of sd_probe() */
3832 return 0;
3833
3834 sdp = sdkp->device;
ed4246d3
MK		 3835
3836 if (sdp->ignore_media_change) {
3837 /* clear the device's sense data */
3838 static const u8 cmd[10] = { REQUEST_SENSE };
3839
3840 if (scsi_execute(sdp, cmd, DMA_NONE, NULL, 0, NULL,
3841 NULL, sdp->request_queue->rq_timeout, 1, 0,
3842 RQF_PM, NULL))
3843 sd_printk(KERN_NOTICE, sdkp,
3844 "Failed to clear sense data\n");
3845 }
3846
3847 return sd_resume(dev);
3848}
3849
1da177e4
LT		 3850/**
3851 * init_sd - entry point for this driver (both when built in or when
3852 * a module).
3853 *
3854 * Note: this function registers this driver with the scsi mid-level.
3855 **/
3856static int __init init_sd(void)
3857{
5e4009ba 3858 int majors = 0, i, err;
1da177e4
LT		 3859
3860 SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n"));
3861
0761df9c 3862 for (i = 0; i < SD_MAJORS; i++) {
996e509b 3863 if (__register_blkdev(sd_major(i), "sd", sd_default_probe))
0761df9c
HR		 3864 continue;
3865 majors++;
0761df9c 3866 }
1da177e4
LT		 3867
3868 if (!majors)
3869 return -ENODEV;
3870
5e4009ba
JG		 3871 err = class_register(&sd_disk_class);
3872 if (err)
3873 goto err_out;
6bdaa1f1 3874
4e7392ec
MP		 3875 sd_cdb_cache = kmem_cache_create("sd_ext_cdb", SD_EXT_CDB_SIZE,
3876 0, 0, NULL);
3877 if (!sd_cdb_cache) {
3878 printk(KERN_ERR "sd: can't init extended cdb cache\n");
8d964478 3879 err = -ENOMEM;
4e7392ec
MP		 3880 goto err_out_class;
3881 }
3882
3883 sd_cdb_pool = mempool_create_slab_pool(SD_MEMPOOL_SIZE, sd_cdb_cache);
3884 if (!sd_cdb_pool) {
3885 printk(KERN_ERR "sd: can't init extended cdb pool\n");
8d964478 3886 err = -ENOMEM;
4e7392ec
MP		 3887 goto err_out_cache;
3888 }
3889
61cce6f6
JA		 3890 sd_page_pool = mempool_create_page_pool(SD_MEMPOOL_SIZE, 0);
3891 if (!sd_page_pool) {
3892 printk(KERN_ERR "sd: can't init discard page pool\n");
3893 err = -ENOMEM;
3894 goto err_out_ppool;
3895 }
3896
afd5e34b
JD		 3897 err = scsi_register_driver(&sd_template.gendrv);
3898 if (err)
3899 goto err_out_driver;
3900
5e4009ba
JG		 3901 return 0;
3902
afd5e34b 3903err_out_driver:
61cce6f6
JA		 3904 mempool_destroy(sd_page_pool);
3905
3906err_out_ppool:
afd5e34b
JD		 3907 mempool_destroy(sd_cdb_pool);
3908
4e7392ec
MP		 3909err_out_cache:
3910 kmem_cache_destroy(sd_cdb_cache);
3911
5e4009ba
JG		 3912err_out_class:
3913 class_unregister(&sd_disk_class);
3914err_out:
3915 for (i = 0; i < SD_MAJORS; i++)
3916 unregister_blkdev(sd_major(i), "sd");
3917 return err;
1da177e4
LT		 3918}
3919
3920/**
3921 * exit_sd - exit point for this driver (when it is a module).
3922 *
3923 * Note: this function unregisters this driver from the scsi mid-level.
3924 **/
3925static void __exit exit_sd(void)
3926{
3927 int i;
3928
3929 SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n"));
3930
afd5e34b 3931 scsi_unregister_driver(&sd_template.gendrv);
4e7392ec 3932 mempool_destroy(sd_cdb_pool);
61cce6f6 3933 mempool_destroy(sd_page_pool);
4e7392ec
MP		 3934 kmem_cache_destroy(sd_cdb_cache);
3935
5e4009ba
JG		 3936 class_unregister(&sd_disk_class);
3937
996e509b 3938 for (i = 0; i < SD_MAJORS; i++)
1da177e4
LT		 3939 unregister_blkdev(sd_major(i), "sd");
3940}
3941
1da177e4
LT		 3942module_init(init_sd);
3943module_exit(exit_sd);
e73aec82 3944
a35989a0 3945void sd_print_sense_hdr(struct scsi_disk *sdkp, struct scsi_sense_hdr *sshdr)
e73aec82 3946{
21045519
HR		 3947 scsi_print_sense_hdr(sdkp->device,
3948 sdkp->disk ? sdkp->disk->disk_name : NULL, sshdr);
e73aec82
MP		 3949}
3950
a35989a0 3951void sd_print_result(const struct scsi_disk *sdkp, const char *msg, int result)
e73aec82 3952{
ef61329d 3953 const char *hb_string = scsi_hostbyte_string(result);
ef61329d 3954
54c29086 3955 if (hb_string)
ef61329d
HR		 3956 sd_printk(KERN_INFO, sdkp,
3957 "%s: Result: hostbyte=%s driverbyte=%s\n", msg,
3958 hb_string ? hb_string : "invalid",
54c29086 3959 "DRIVER_OK");
ef61329d
HR		 3960 else
3961 sd_printk(KERN_INFO, sdkp,
54c29086
HR		 3962 "%s: Result: hostbyte=0x%02x driverbyte=%s\n",
3963 msg, host_byte(result), "DRIVER_OK");
e73aec82 3964}
Linux 6.x block layer and io_uring tree(s)