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Merge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-2.6-block.git] / drivers / scsi / sd.c
CommitLineData
09c434b8 1// SPDX-License-Identifier: GPL-2.0-only
1da177e4
LT		 2/*
3 * sd.c Copyright (C) 1992 Drew Eckhardt
4 * Copyright (C) 1993, 1994, 1995, 1999 Eric Youngdale
5 *
6 * Linux scsi disk driver
7 * Initial versions: Drew Eckhardt
8 * Subsequent revisions: Eric Youngdale
9 * Modification history:
10 * - Drew Eckhardt <drew@colorado.edu> original
11 * - Eric Youngdale <eric@andante.org> add scatter-gather, multiple
12 * outstanding request, and other enhancements.
13 * Support loadable low-level scsi drivers.
14 * - Jirka Hanika <geo@ff.cuni.cz> support more scsi disks using
15 * eight major numbers.
16 * - Richard Gooch <rgooch@atnf.csiro.au> support devfs.
17 * - Torben Mathiasen <tmm@image.dk> Resource allocation fixes in
18 * sd_init and cleanups.
19 * - Alex Davis <letmein@erols.com> Fix problem where partition info
20 * not being read in sd_open. Fix problem where removable media
21 * could be ejected after sd_open.
22 * - Douglas Gilbert <dgilbert@interlog.com> cleanup for lk 2.5.x
23 * - Badari Pulavarty <pbadari@us.ibm.com>, Matthew Wilcox
24 * <willy@debian.org>, Kurt Garloff <garloff@suse.de>:
25 * Support 32k/1M disks.
26 *
27 * Logging policy (needs CONFIG_SCSI_LOGGING defined):
28 * - setting up transfer: SCSI_LOG_HLQUEUE levels 1 and 2
29 * - end of transfer (bh + scsi_lib): SCSI_LOG_HLCOMPLETE level 1
30 * - entering sd_ioctl: SCSI_LOG_IOCTL level 1
31 * - entering other commands: SCSI_LOG_HLQUEUE level 3
32 * Note: when the logging level is set by the user, it must be greater
33 * than the level indicated above to trigger output.
34 */
35
1da177e4
LT		 36#include <linux/module.h>
37#include <linux/fs.h>
38#include <linux/kernel.h>
1da177e4
LT		 39#include <linux/mm.h>
40#include <linux/bio.h>
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>
0b950672 51#include <linux/mutex.h>
7404ad3b 52#include <linux/string_helpers.h>
4ace92fc 53#include <linux/async.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
870d6656 101#if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT)
f615b48c 102#define SD_MINORS 16
870d6656 103#else
3e1a7ff8 104#define SD_MINORS 0
870d6656
TH		 105#endif
106
c98a0eb0 107static void sd_config_discard(struct scsi_disk *, unsigned int);
5db44863 108static void sd_config_write_same(struct scsi_disk *);
7b3d9545 109static int sd_revalidate_disk(struct gendisk *);
72ec24bd 110static void sd_unlock_native_capacity(struct gendisk *disk);
7b3d9545
LT		 111static int sd_probe(struct device *);
112static int sd_remove(struct device *);
113static void sd_shutdown(struct device *);
95897910
ON		 114static int sd_suspend_system(struct device *);
115static int sd_suspend_runtime(struct device *);
7b3d9545
LT		 116static int sd_resume(struct device *);
117static void sd_rescan(struct device *);
159b2cbf 118static blk_status_t sd_init_command(struct scsi_cmnd *SCpnt);
a1b73fc1 119static void sd_uninit_command(struct scsi_cmnd *SCpnt);
7b3d9545 120static int sd_done(struct scsi_cmnd *);
7a38dc0b 121static void sd_eh_reset(struct scsi_cmnd *);
2451079b 122static int sd_eh_action(struct scsi_cmnd *, int);
7b3d9545 123static void sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer);
ee959b00 124static void scsi_disk_release(struct device *cdev);
7b3d9545 125static void sd_print_sense_hdr(struct scsi_disk *, struct scsi_sense_hdr *);
ef61329d 126static void sd_print_result(const struct scsi_disk *, const char *, int);
7b3d9545 127
f27bac27 128static DEFINE_IDA(sd_index_ida);
1da177e4
LT		 129
130/* This semaphore is used to mediate the 0->1 reference get in the
131 * face of object destruction (i.e. we can't allow a get on an
132 * object after last put) */
0b950672 133static DEFINE_MUTEX(sd_ref_mutex);
1da177e4 134
439d77f7
HS		 135static struct kmem_cache *sd_cdb_cache;
136static mempool_t *sd_cdb_pool;
61cce6f6 137static mempool_t *sd_page_pool;
4e7392ec 138
6bdaa1f1
JB		 139static const char *sd_cache_types[] = {
140 "write through", "none", "write back",
141 "write back, no read (daft)"
142};
143
cb2fb68d
VC		 144static void sd_set_flush_flag(struct scsi_disk *sdkp)
145{
eb310e23 146 bool wc = false, fua = false;
cb2fb68d
VC		 147
148 if (sdkp->WCE) {
eb310e23 149 wc = true;
cb2fb68d 150 if (sdkp->DPOFUA)
eb310e23 151 fua = true;
cb2fb68d
VC		 152 }
153
eb310e23 154 blk_queue_write_cache(sdkp->disk->queue, wc, fua);
cb2fb68d
VC		 155}
156
ee959b00 157static ssize_t
e1ea2351
GKH		 158cache_type_store(struct device *dev, struct device_attribute *attr,
159 const char *buf, size_t count)
6bdaa1f1 160{
4c11712a 161 int ct, rcd, wce, sp;
ee959b00 162 struct scsi_disk *sdkp = to_scsi_disk(dev);
6bdaa1f1
JB		 163 struct scsi_device *sdp = sdkp->device;
164 char buffer[64];
165 char *buffer_data;
166 struct scsi_mode_data data;
167 struct scsi_sense_hdr sshdr;
2ee3e26c 168 static const char temp[] = "temporary ";
6bdaa1f1
JB		 169 int len;
170
89d94756 171 if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC)
6bdaa1f1
JB		 172 /* no cache control on RBC devices; theoretically they
173 * can do it, but there's probably so many exceptions
174 * it's not worth the risk */
175 return -EINVAL;
176
39c60a09
JB		 177 if (strncmp(buf, temp, sizeof(temp) - 1) == 0) {
178 buf += sizeof(temp) - 1;
179 sdkp->cache_override = 1;
180 } else {
181 sdkp->cache_override = 0;
182 }
183
4c11712a 184 ct = sysfs_match_string(sd_cache_types, buf);
6bdaa1f1
JB		 185 if (ct < 0)
186 return -EINVAL;
4c11712a 187
6bdaa1f1 188 rcd = ct & 0x01 ? 1 : 0;
2eefd57b 189 wce = (ct & 0x02) && !sdkp->write_prot ? 1 : 0;
39c60a09
JB		 190
191 if (sdkp->cache_override) {
192 sdkp->WCE = wce;
193 sdkp->RCD = rcd;
cb2fb68d 194 sd_set_flush_flag(sdkp);
39c60a09
JB		 195 return count;
196 }
197
6bdaa1f1
JB		 198 if (scsi_mode_sense(sdp, 0x08, 8, buffer, sizeof(buffer), SD_TIMEOUT,
199 SD_MAX_RETRIES, &data, NULL))
200 return -EINVAL;
a9312fb8 201 len = min_t(size_t, sizeof(buffer), data.length - data.header_length -
6bdaa1f1
JB		 202 data.block_descriptor_length);
203 buffer_data = buffer + data.header_length +
204 data.block_descriptor_length;
205 buffer_data[2] &= ~0x05;
206 buffer_data[2] |= wce << 2 | rcd;
207 sp = buffer_data[0] & 0x80 ? 1 : 0;
2c5d16d6 208 buffer_data[0] &= ~0x80;
6bdaa1f1 209
44759979
IM		 210 /*
211 * Ensure WP, DPOFUA, and RESERVED fields are cleared in
212 * received mode parameter buffer before doing MODE SELECT.
213 */
214 data.device_specific = 0;
215
6bdaa1f1
JB		 216 if (scsi_mode_select(sdp, 1, sp, 8, buffer_data, len, SD_TIMEOUT,
217 SD_MAX_RETRIES, &data, &sshdr)) {
218 if (scsi_sense_valid(&sshdr))
e73aec82 219 sd_print_sense_hdr(sdkp, &sshdr);
6bdaa1f1
JB		 220 return -EINVAL;
221 }
f98a8cae 222 revalidate_disk(sdkp->disk);
6bdaa1f1
JB		 223 return count;
224}
225
ee959b00 226static ssize_t
e1ea2351
GKH		 227manage_start_stop_show(struct device *dev, struct device_attribute *attr,
228 char *buf)
229{
230 struct scsi_disk *sdkp = to_scsi_disk(dev);
231 struct scsi_device *sdp = sdkp->device;
232
4c11712a 233 return sprintf(buf, "%u\n", sdp->manage_start_stop);
e1ea2351
GKH		 234}
235
236static ssize_t
237manage_start_stop_store(struct device *dev, struct device_attribute *attr,
238 const char *buf, size_t count)
c3c94c5a 239{
ee959b00 240 struct scsi_disk *sdkp = to_scsi_disk(dev);
c3c94c5a 241 struct scsi_device *sdp = sdkp->device;
623401ee 242 bool v;
c3c94c5a
TH		 243
244 if (!capable(CAP_SYS_ADMIN))
245 return -EACCES;
246
623401ee 247 if (kstrtobool(buf, &v))
248 return -EINVAL;
249
250 sdp->manage_start_stop = v;
c3c94c5a
TH		 251
252 return count;
253}
e1ea2351 254static DEVICE_ATTR_RW(manage_start_stop);
c3c94c5a 255
ee959b00 256static ssize_t
e1ea2351
GKH		 257allow_restart_show(struct device *dev, struct device_attribute *attr, char *buf)
258{
259 struct scsi_disk *sdkp = to_scsi_disk(dev);
260
4c11712a 261 return sprintf(buf, "%u\n", sdkp->device->allow_restart);
e1ea2351
GKH		 262}
263
264static ssize_t
265allow_restart_store(struct device *dev, struct device_attribute *attr,
266 const char *buf, size_t count)
a144c5ae 267{
658e9a6d 268 bool v;
ee959b00 269 struct scsi_disk *sdkp = to_scsi_disk(dev);
a144c5ae
BK		 270 struct scsi_device *sdp = sdkp->device;
271
272 if (!capable(CAP_SYS_ADMIN))
273 return -EACCES;
274
89d94756 275 if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC)
a144c5ae
BK		 276 return -EINVAL;
277
658e9a6d 278 if (kstrtobool(buf, &v))
279 return -EINVAL;
280
281 sdp->allow_restart = v;
a144c5ae
BK		 282
283 return count;
284}
e1ea2351 285static DEVICE_ATTR_RW(allow_restart);
a144c5ae 286
ee959b00 287static ssize_t
e1ea2351 288cache_type_show(struct device *dev, struct device_attribute *attr, char *buf)
6bdaa1f1 289{
ee959b00 290 struct scsi_disk *sdkp = to_scsi_disk(dev);
6bdaa1f1
JB		 291 int ct = sdkp->RCD + 2*sdkp->WCE;
292
4c11712a 293 return sprintf(buf, "%s\n", sd_cache_types[ct]);
6bdaa1f1 294}
e1ea2351 295static DEVICE_ATTR_RW(cache_type);
6bdaa1f1 296
ee959b00 297static ssize_t
e1ea2351 298FUA_show(struct device *dev, struct device_attribute *attr, char *buf)
6bdaa1f1 299{
ee959b00 300 struct scsi_disk *sdkp = to_scsi_disk(dev);
6bdaa1f1 301
4c11712a 302 return sprintf(buf, "%u\n", sdkp->DPOFUA);
6bdaa1f1 303}
e1ea2351 304static DEVICE_ATTR_RO(FUA);
6bdaa1f1 305
ee959b00 306static ssize_t
e1ea2351
GKH		 307protection_type_show(struct device *dev, struct device_attribute *attr,
308 char *buf)
e0597d70
MP		 309{
310 struct scsi_disk *sdkp = to_scsi_disk(dev);
311
4c11712a 312 return sprintf(buf, "%u\n", sdkp->protection_type);
e0597d70
MP		 313}
314
8172499a 315static ssize_t
e1ea2351
GKH		 316protection_type_store(struct device *dev, struct device_attribute *attr,
317 const char *buf, size_t count)
8172499a
MP		 318{
319 struct scsi_disk *sdkp = to_scsi_disk(dev);
320 unsigned int val;
321 int err;
322
323 if (!capable(CAP_SYS_ADMIN))
324 return -EACCES;
325
326 err = kstrtouint(buf, 10, &val);
327
328 if (err)
329 return err;
330
830cc351 331 if (val <= T10_PI_TYPE3_PROTECTION)
8172499a
MP		 332 sdkp->protection_type = val;
333
334 return count;
335}
e1ea2351 336static DEVICE_ATTR_RW(protection_type);
8172499a 337
518fa8e3 338static ssize_t
e1ea2351
GKH		 339protection_mode_show(struct device *dev, struct device_attribute *attr,
340 char *buf)
518fa8e3
MP		 341{
342 struct scsi_disk *sdkp = to_scsi_disk(dev);
343 struct scsi_device *sdp = sdkp->device;
344 unsigned int dif, dix;
345
346 dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type);
347 dix = scsi_host_dix_capable(sdp->host, sdkp->protection_type);
348
8475c811 349 if (!dix && scsi_host_dix_capable(sdp->host, T10_PI_TYPE0_PROTECTION)) {
518fa8e3
MP		 350 dif = 0;
351 dix = 1;
352 }
353
354 if (!dif && !dix)
4c11712a 355 return sprintf(buf, "none\n");
518fa8e3 356
4c11712a 357 return sprintf(buf, "%s%u\n", dix ? "dix" : "dif", dif);
518fa8e3 358}
e1ea2351 359static DEVICE_ATTR_RO(protection_mode);
518fa8e3 360
e0597d70 361static ssize_t
e1ea2351 362app_tag_own_show(struct device *dev, struct device_attribute *attr, char *buf)
e0597d70
MP		 363{
364 struct scsi_disk *sdkp = to_scsi_disk(dev);
365
4c11712a 366 return sprintf(buf, "%u\n", sdkp->ATO);
e0597d70 367}
e1ea2351 368static DEVICE_ATTR_RO(app_tag_own);
e0597d70 369
e339c1a7 370static ssize_t
e1ea2351
GKH		 371thin_provisioning_show(struct device *dev, struct device_attribute *attr,
372 char *buf)
e339c1a7
MP		 373{
374 struct scsi_disk *sdkp = to_scsi_disk(dev);
375
4c11712a 376 return sprintf(buf, "%u\n", sdkp->lbpme);
c98a0eb0 377}
e1ea2351 378static DEVICE_ATTR_RO(thin_provisioning);
c98a0eb0 379
4c11712a 380/* sysfs_match_string() requires dense arrays */
c98a0eb0
MP		 381static const char *lbp_mode[] = {
382 [SD_LBP_FULL] = "full",
383 [SD_LBP_UNMAP] = "unmap",
384 [SD_LBP_WS16] = "writesame_16",
385 [SD_LBP_WS10] = "writesame_10",
386 [SD_LBP_ZERO] = "writesame_zero",
387 [SD_LBP_DISABLE] = "disabled",
388};
389
390static ssize_t
e1ea2351
GKH		 391provisioning_mode_show(struct device *dev, struct device_attribute *attr,
392 char *buf)
c98a0eb0
MP		 393{
394 struct scsi_disk *sdkp = to_scsi_disk(dev);
395
4c11712a 396 return sprintf(buf, "%s\n", lbp_mode[sdkp->provisioning_mode]);
c98a0eb0
MP		 397}
398
399static ssize_t
e1ea2351
GKH		 400provisioning_mode_store(struct device *dev, struct device_attribute *attr,
401 const char *buf, size_t count)
c98a0eb0
MP		 402{
403 struct scsi_disk *sdkp = to_scsi_disk(dev);
404 struct scsi_device *sdp = sdkp->device;
4c11712a 405 int mode;
c98a0eb0
MP		 406
407 if (!capable(CAP_SYS_ADMIN))
408 return -EACCES;
409
89d94756
HR		 410 if (sd_is_zoned(sdkp)) {
411 sd_config_discard(sdkp, SD_LBP_DISABLE);
412 return count;
413 }
414
c98a0eb0
MP		 415 if (sdp->type != TYPE_DISK)
416 return -EINVAL;
417
4c11712a
MP		 418 mode = sysfs_match_string(lbp_mode, buf);
419 if (mode < 0)
c98a0eb0
MP		 420 return -EINVAL;
421
4c11712a
MP		 422 sd_config_discard(sdkp, mode);
423
c98a0eb0 424 return count;
e339c1a7 425}
e1ea2351 426static DEVICE_ATTR_RW(provisioning_mode);
e339c1a7 427
4c11712a 428/* sysfs_match_string() requires dense arrays */
e6bd9312
MP		 429static const char *zeroing_mode[] = {
430 [SD_ZERO_WRITE] = "write",
431 [SD_ZERO_WS] = "writesame",
432 [SD_ZERO_WS16_UNMAP] = "writesame_16_unmap",
433 [SD_ZERO_WS10_UNMAP] = "writesame_10_unmap",
434};
435
436static ssize_t
437zeroing_mode_show(struct device *dev, struct device_attribute *attr,
438 char *buf)
439{
440 struct scsi_disk *sdkp = to_scsi_disk(dev);
441
4c11712a 442 return sprintf(buf, "%s\n", zeroing_mode[sdkp->zeroing_mode]);
e6bd9312
MP		 443}
444
445static ssize_t
446zeroing_mode_store(struct device *dev, struct device_attribute *attr,
447 const char *buf, size_t count)
448{
449 struct scsi_disk *sdkp = to_scsi_disk(dev);
4c11712a 450 int mode;
e6bd9312
MP		 451
452 if (!capable(CAP_SYS_ADMIN))
453 return -EACCES;
454
4c11712a
MP		 455 mode = sysfs_match_string(zeroing_mode, buf);
456 if (mode < 0)
e6bd9312
MP		 457 return -EINVAL;
458
4c11712a
MP		 459 sdkp->zeroing_mode = mode;
460
e6bd9312
MP		 461 return count;
462}
463static DEVICE_ATTR_RW(zeroing_mode);
464
18a4d0a2 465static ssize_t
e1ea2351
GKH		 466max_medium_access_timeouts_show(struct device *dev,
467 struct device_attribute *attr, char *buf)
18a4d0a2
MP		 468{
469 struct scsi_disk *sdkp = to_scsi_disk(dev);
470
4c11712a 471 return sprintf(buf, "%u\n", sdkp->max_medium_access_timeouts);
18a4d0a2
MP		 472}
473
474static ssize_t
e1ea2351
GKH		 475max_medium_access_timeouts_store(struct device *dev,
476 struct device_attribute *attr, const char *buf,
477 size_t count)
18a4d0a2
MP		 478{
479 struct scsi_disk *sdkp = to_scsi_disk(dev);
480 int err;
481
482 if (!capable(CAP_SYS_ADMIN))
483 return -EACCES;
484
485 err = kstrtouint(buf, 10, &sdkp->max_medium_access_timeouts);
486
487 return err ? err : count;
488}
e1ea2351 489static DEVICE_ATTR_RW(max_medium_access_timeouts);
18a4d0a2 490
5db44863 491static ssize_t
e1ea2351
GKH		 492max_write_same_blocks_show(struct device *dev, struct device_attribute *attr,
493 char *buf)
5db44863
MP		 494{
495 struct scsi_disk *sdkp = to_scsi_disk(dev);
496
4c11712a 497 return sprintf(buf, "%u\n", sdkp->max_ws_blocks);
5db44863
MP		 498}
499
500static ssize_t
e1ea2351
GKH		 501max_write_same_blocks_store(struct device *dev, struct device_attribute *attr,
502 const char *buf, size_t count)
5db44863
MP		 503{
504 struct scsi_disk *sdkp = to_scsi_disk(dev);
505 struct scsi_device *sdp = sdkp->device;
506 unsigned long max;
507 int err;
508
509 if (!capable(CAP_SYS_ADMIN))
510 return -EACCES;
511
89d94756 512 if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC)
5db44863
MP		 513 return -EINVAL;
514
515 err = kstrtoul(buf, 10, &max);
516
517 if (err)
518 return err;
519
520 if (max == 0)
521 sdp->no_write_same = 1;
66c28f97
MP		 522 else if (max <= SD_MAX_WS16_BLOCKS) {
523 sdp->no_write_same = 0;
5db44863 524 sdkp->max_ws_blocks = max;
66c28f97 525 }
5db44863
MP		 526
527 sd_config_write_same(sdkp);
528
529 return count;
530}
e1ea2351
GKH		 531static DEVICE_ATTR_RW(max_write_same_blocks);
532
533static struct attribute *sd_disk_attrs[] = {
534 &dev_attr_cache_type.attr,
535 &dev_attr_FUA.attr,
536 &dev_attr_allow_restart.attr,
537 &dev_attr_manage_start_stop.attr,
538 &dev_attr_protection_type.attr,
539 &dev_attr_protection_mode.attr,
540 &dev_attr_app_tag_own.attr,
541 &dev_attr_thin_provisioning.attr,
542 &dev_attr_provisioning_mode.attr,
e6bd9312 543 &dev_attr_zeroing_mode.attr,
e1ea2351
GKH		 544 &dev_attr_max_write_same_blocks.attr,
545 &dev_attr_max_medium_access_timeouts.attr,
546 NULL,
6bdaa1f1 547};
e1ea2351 548ATTRIBUTE_GROUPS(sd_disk);
6bdaa1f1
JB		 549
550static struct class sd_disk_class = {
551 .name = "scsi_disk",
552 .owner = THIS_MODULE,
ee959b00 553 .dev_release = scsi_disk_release,
e1ea2351 554 .dev_groups = sd_disk_groups,
6bdaa1f1 555};
1da177e4 556
691e3d31 557static const struct dev_pm_ops sd_pm_ops = {
95897910 558 .suspend = sd_suspend_system,
691e3d31 559 .resume = sd_resume,
95897910 560 .poweroff = sd_suspend_system,
691e3d31 561 .restore = sd_resume,
95897910 562 .runtime_suspend = sd_suspend_runtime,
691e3d31
AL		 563 .runtime_resume = sd_resume,
564};
565
1da177e4 566static struct scsi_driver sd_template = {
1da177e4
LT		 567 .gendrv = {
568 .name = "sd",
3af6b352 569 .owner = THIS_MODULE,
1da177e4 570 .probe = sd_probe,
f049cf1a 571 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
1da177e4
LT		 572 .remove = sd_remove,
573 .shutdown = sd_shutdown,
691e3d31 574 .pm = &sd_pm_ops,
1da177e4
LT		 575 },
576 .rescan = sd_rescan,
a1b73fc1
CH		 577 .init_command = sd_init_command,
578 .uninit_command = sd_uninit_command,
7b3d9545 579 .done = sd_done,
18a4d0a2 580 .eh_action = sd_eh_action,
7a38dc0b 581 .eh_reset = sd_eh_reset,
1da177e4
LT		 582};
583
0761df9c
HR		 584/*
585 * Dummy kobj_map->probe function.
586 * The default ->probe function will call modprobe, which is
587 * pointless as this module is already loaded.
588 */
589static struct kobject *sd_default_probe(dev_t devt, int *partno, void *data)
590{
591 return NULL;
592}
593
1da177e4
LT		 594/*
595 * Device no to disk mapping:
596 *
597 * major disc2 disc p1
598 * |............|.............|....|....| <- dev_t
599 * 31 20 19 8 7 4 3 0
600 *
601 * Inside a major, we have 16k disks, however mapped non-
602 * contiguously. The first 16 disks are for major0, the next
603 * ones with major1, ... Disk 256 is for major0 again, disk 272
604 * for major1, ...
605 * As we stay compatible with our numbering scheme, we can reuse
606 * the well-know SCSI majors 8, 65--71, 136--143.
607 */
608static int sd_major(int major_idx)
609{
610 switch (major_idx) {
611 case 0:
612 return SCSI_DISK0_MAJOR;
613 case 1 ... 7:
614 return SCSI_DISK1_MAJOR + major_idx - 1;
615 case 8 ... 15:
616 return SCSI_DISK8_MAJOR + major_idx - 8;
617 default:
618 BUG();
619 return 0; /* shut up gcc */
620 }
621}
622
3d9a1f53 623static struct scsi_disk *scsi_disk_get(struct gendisk *disk)
1da177e4
LT		 624{
625 struct scsi_disk *sdkp = NULL;
626
3d9a1f53
CH		 627 mutex_lock(&sd_ref_mutex);
628
39b7f1e2
AS		 629 if (disk->private_data) {
630 sdkp = scsi_disk(disk);
631 if (scsi_device_get(sdkp->device) == 0)
ee959b00 632 get_device(&sdkp->dev);
39b7f1e2
AS		 633 else
634 sdkp = NULL;
635 }
0b950672 636 mutex_unlock(&sd_ref_mutex);
1da177e4
LT		 637 return sdkp;
638}
639
640static void scsi_disk_put(struct scsi_disk *sdkp)
641{
642 struct scsi_device *sdev = sdkp->device;
643
0b950672 644 mutex_lock(&sd_ref_mutex);
ee959b00 645 put_device(&sdkp->dev);
1da177e4 646 scsi_device_put(sdev);
0b950672 647 mutex_unlock(&sd_ref_mutex);
1da177e4
LT		 648}
649
d80210f2
CH		 650#ifdef CONFIG_BLK_SED_OPAL
651static int sd_sec_submit(void *data, u16 spsp, u8 secp, void *buffer,
652 size_t len, bool send)
653{
654 struct scsi_device *sdev = data;
655 u8 cdb[12] = { 0, };
656 int ret;
657
658 cdb[0] = send ? SECURITY_PROTOCOL_OUT : SECURITY_PROTOCOL_IN;
659 cdb[1] = secp;
660 put_unaligned_be16(spsp, &cdb[2]);
661 put_unaligned_be32(len, &cdb[6]);
662
663 ret = scsi_execute_req(sdev, cdb,
664 send ? DMA_TO_DEVICE : DMA_FROM_DEVICE,
665 buffer, len, NULL, SD_TIMEOUT, SD_MAX_RETRIES, NULL);
666 return ret <= 0 ? ret : -EIO;
667}
668#endif /* CONFIG_BLK_SED_OPAL */
669
082c2cd2
JG		 670/*
671 * Look up the DIX operation based on whether the command is read or
672 * write and whether dix and dif are enabled.
673 */
674static unsigned int sd_prot_op(bool write, bool dix, bool dif)
675{
676 /* Lookup table: bit 2 (write), bit 1 (dix), bit 0 (dif) */
677 static const unsigned int ops[] = { /* wrt dix dif */
678 SCSI_PROT_NORMAL, /* 0 0 0 */
679 SCSI_PROT_READ_STRIP, /* 0 0 1 */
680 SCSI_PROT_READ_INSERT, /* 0 1 0 */
681 SCSI_PROT_READ_PASS, /* 0 1 1 */
682 SCSI_PROT_NORMAL, /* 1 0 0 */
683 SCSI_PROT_WRITE_INSERT, /* 1 0 1 */
684 SCSI_PROT_WRITE_STRIP, /* 1 1 0 */
685 SCSI_PROT_WRITE_PASS, /* 1 1 1 */
686 };
687
688 return ops[write << 2 | dix << 1 | dif];
689}
690
691/*
692 * Returns a mask of the protection flags that are valid for a given DIX
693 * operation.
694 */
695static unsigned int sd_prot_flag_mask(unsigned int prot_op)
696{
697 static const unsigned int flag_mask[] = {
698 [SCSI_PROT_NORMAL] = 0,
699
700 [SCSI_PROT_READ_STRIP] = SCSI_PROT_TRANSFER_PI |
701 SCSI_PROT_GUARD_CHECK |
702 SCSI_PROT_REF_CHECK |
703 SCSI_PROT_REF_INCREMENT,
704
705 [SCSI_PROT_READ_INSERT] = SCSI_PROT_REF_INCREMENT |
706 SCSI_PROT_IP_CHECKSUM,
707
708 [SCSI_PROT_READ_PASS] = SCSI_PROT_TRANSFER_PI |
709 SCSI_PROT_GUARD_CHECK |
710 SCSI_PROT_REF_CHECK |
711 SCSI_PROT_REF_INCREMENT |
712 SCSI_PROT_IP_CHECKSUM,
713
714 [SCSI_PROT_WRITE_INSERT] = SCSI_PROT_TRANSFER_PI |
715 SCSI_PROT_REF_INCREMENT,
716
717 [SCSI_PROT_WRITE_STRIP] = SCSI_PROT_GUARD_CHECK |
718 SCSI_PROT_REF_CHECK |
719 SCSI_PROT_REF_INCREMENT |
720 SCSI_PROT_IP_CHECKSUM,
721
722 [SCSI_PROT_WRITE_PASS] = SCSI_PROT_TRANSFER_PI |
723 SCSI_PROT_GUARD_CHECK |
724 SCSI_PROT_REF_CHECK |
725 SCSI_PROT_REF_INCREMENT |
726 SCSI_PROT_IP_CHECKSUM,
727 };
728
729 return flag_mask[prot_op];
730}
731
c611529e
MP		 732static unsigned char sd_setup_protect_cmnd(struct scsi_cmnd *scmd,
733 unsigned int dix, unsigned int dif)
35e1a5d9 734{
c611529e
MP		 735 struct bio *bio = scmd->request->bio;
736 unsigned int prot_op = sd_prot_op(rq_data_dir(scmd->request), dix, dif);
737 unsigned int protect = 0;
738
739 if (dix) { /* DIX Type 0, 1, 2, 3 */
740 if (bio_integrity_flagged(bio, BIP_IP_CHECKSUM))
741 scmd->prot_flags |= SCSI_PROT_IP_CHECKSUM;
742
743 if (bio_integrity_flagged(bio, BIP_CTRL_NOCHECK) == false)
744 scmd->prot_flags |= SCSI_PROT_GUARD_CHECK;
745 }
746
8475c811 747 if (dif != T10_PI_TYPE3_PROTECTION) { /* DIX/DIF Type 0, 1, 2 */
c611529e
MP		 748 scmd->prot_flags |= SCSI_PROT_REF_INCREMENT;
749
750 if (bio_integrity_flagged(bio, BIP_CTRL_NOCHECK) == false)
751 scmd->prot_flags |= SCSI_PROT_REF_CHECK;
752 }
753
754 if (dif) { /* DIX/DIF Type 1, 2, 3 */
755 scmd->prot_flags |= SCSI_PROT_TRANSFER_PI;
756
757 if (bio_integrity_flagged(bio, BIP_DISK_NOCHECK))
758 protect = 3 << 5; /* Disable target PI checking */
759 else
760 protect = 1 << 5; /* Enable target PI checking */
35e1a5d9
MP		 761 }
762
763 scsi_set_prot_op(scmd, prot_op);
764 scsi_set_prot_type(scmd, dif);
c611529e
MP		 765 scmd->prot_flags &= sd_prot_flag_mask(prot_op);
766
767 return protect;
35e1a5d9
MP		 768}
769
c98a0eb0
MP		 770static void sd_config_discard(struct scsi_disk *sdkp, unsigned int mode)
771{
772 struct request_queue *q = sdkp->disk->queue;
773 unsigned int logical_block_size = sdkp->device->sector_size;
774 unsigned int max_blocks = 0;
775
bcd069bb
MP		 776 q->limits.discard_alignment =
777 sdkp->unmap_alignment * logical_block_size;
778 q->limits.discard_granularity =
779 max(sdkp->physical_block_size,
780 sdkp->unmap_granularity * logical_block_size);
89730393
MP		 781 sdkp->provisioning_mode = mode;
782
c98a0eb0
MP		 783 switch (mode) {
784
4c11712a 785 case SD_LBP_FULL:
c98a0eb0 786 case SD_LBP_DISABLE:
2bb4cd5c 787 blk_queue_max_discard_sectors(q, 0);
8b904b5b 788 blk_queue_flag_clear(QUEUE_FLAG_DISCARD, q);
c98a0eb0
MP		 789 return;
790
791 case SD_LBP_UNMAP:
5db44863
MP		 792 max_blocks = min_not_zero(sdkp->max_unmap_blocks,
793 (u32)SD_MAX_WS16_BLOCKS);
c98a0eb0
MP		 794 break;
795
796 case SD_LBP_WS16:
28a0bc41
MP		 797 if (sdkp->device->unmap_limit_for_ws)
798 max_blocks = sdkp->max_unmap_blocks;
799 else
800 max_blocks = sdkp->max_ws_blocks;
801
802 max_blocks = min_not_zero(max_blocks, (u32)SD_MAX_WS16_BLOCKS);
c98a0eb0
MP		 803 break;
804
805 case SD_LBP_WS10:
28a0bc41
MP		 806 if (sdkp->device->unmap_limit_for_ws)
807 max_blocks = sdkp->max_unmap_blocks;
808 else
809 max_blocks = sdkp->max_ws_blocks;
810
811 max_blocks = min_not_zero(max_blocks, (u32)SD_MAX_WS10_BLOCKS);
c98a0eb0
MP		 812 break;
813
814 case SD_LBP_ZERO:
5db44863
MP		 815 max_blocks = min_not_zero(sdkp->max_ws_blocks,
816 (u32)SD_MAX_WS10_BLOCKS);
c98a0eb0
MP		 817 break;
818 }
819
2bb4cd5c 820 blk_queue_max_discard_sectors(q, max_blocks * (logical_block_size >> 9));
8b904b5b 821 blk_queue_flag_set(QUEUE_FLAG_DISCARD, q);
c98a0eb0
MP		 822}
823
159b2cbf 824static blk_status_t sd_setup_unmap_cmnd(struct scsi_cmnd *cmd)
e339c1a7 825{
6a7b4398 826 struct scsi_device *sdp = cmd->device;
81d926e8 827 struct request *rq = cmd->request;
c6c93fdd
MP		 828 u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq));
829 u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq));
81d926e8 830 unsigned int data_len = 24;
c98a0eb0 831 char *buf;
e339c1a7 832
61cce6f6 833 rq->special_vec.bv_page = mempool_alloc(sd_page_pool, GFP_ATOMIC);
81d926e8 834 if (!rq->special_vec.bv_page)
159b2cbf 835 return BLK_STS_RESOURCE;
61cce6f6 836 clear_highpage(rq->special_vec.bv_page);
81d926e8
CH		 837 rq->special_vec.bv_offset = 0;
838 rq->special_vec.bv_len = data_len;
839 rq->rq_flags |= RQF_SPECIAL_PAYLOAD;
66ac0280 840
81d926e8
CH		 841 cmd->cmd_len = 10;
842 cmd->cmnd[0] = UNMAP;
843 cmd->cmnd[8] = 24;
e339c1a7 844
81d926e8
CH		 845 buf = page_address(rq->special_vec.bv_page);
846 put_unaligned_be16(6 + 16, &buf[0]);
847 put_unaligned_be16(16, &buf[2]);
c6c93fdd
MP		 848 put_unaligned_be64(lba, &buf[8]);
849 put_unaligned_be32(nr_blocks, &buf[16]);
e339c1a7 850
81d926e8
CH		 851 cmd->allowed = SD_MAX_RETRIES;
852 cmd->transfersize = data_len;
853 rq->timeout = SD_TIMEOUT;
e339c1a7 854
81d926e8
CH		 855 return scsi_init_io(cmd);
856}
c98a0eb0 857
159b2cbf
CH		 858static blk_status_t sd_setup_write_same16_cmnd(struct scsi_cmnd *cmd,
859 bool unmap)
81d926e8
CH		 860{
861 struct scsi_device *sdp = cmd->device;
862 struct request *rq = cmd->request;
c6c93fdd
MP		 863 u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq));
864 u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq));
81d926e8 865 u32 data_len = sdp->sector_size;
c98a0eb0 866
61cce6f6 867 rq->special_vec.bv_page = mempool_alloc(sd_page_pool, GFP_ATOMIC);
81d926e8 868 if (!rq->special_vec.bv_page)
159b2cbf 869 return BLK_STS_RESOURCE;
61cce6f6 870 clear_highpage(rq->special_vec.bv_page);
81d926e8
CH		 871 rq->special_vec.bv_offset = 0;
872 rq->special_vec.bv_len = data_len;
873 rq->rq_flags |= RQF_SPECIAL_PAYLOAD;
c98a0eb0 874
81d926e8
CH		 875 cmd->cmd_len = 16;
876 cmd->cmnd[0] = WRITE_SAME_16;
02d26103 877 if (unmap)
6a7b4398 878 cmd->cmnd[1] = 0x8; /* UNMAP */
c6c93fdd
MP		 879 put_unaligned_be64(lba, &cmd->cmnd[2]);
880 put_unaligned_be32(nr_blocks, &cmd->cmnd[10]);
66ac0280 881
81d926e8
CH		 882 cmd->allowed = SD_MAX_RETRIES;
883 cmd->transfersize = data_len;
02d26103 884 rq->timeout = unmap ? SD_TIMEOUT : SD_WRITE_SAME_TIMEOUT;
c98a0eb0 885
81d926e8
CH		 886 return scsi_init_io(cmd);
887}
c98a0eb0 888
159b2cbf
CH		 889static blk_status_t sd_setup_write_same10_cmnd(struct scsi_cmnd *cmd,
890 bool unmap)
81d926e8
CH		 891{
892 struct scsi_device *sdp = cmd->device;
893 struct request *rq = cmd->request;
c6c93fdd
MP		 894 u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq));
895 u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq));
81d926e8 896 u32 data_len = sdp->sector_size;
c98a0eb0 897
61cce6f6 898 rq->special_vec.bv_page = mempool_alloc(sd_page_pool, GFP_ATOMIC);
81d926e8 899 if (!rq->special_vec.bv_page)
159b2cbf 900 return BLK_STS_RESOURCE;
61cce6f6 901 clear_highpage(rq->special_vec.bv_page);
81d926e8
CH		 902 rq->special_vec.bv_offset = 0;
903 rq->special_vec.bv_len = data_len;
f9d03f96 904 rq->rq_flags |= RQF_SPECIAL_PAYLOAD;
e339c1a7 905
81d926e8
CH		 906 cmd->cmd_len = 10;
907 cmd->cmnd[0] = WRITE_SAME;
908 if (unmap)
909 cmd->cmnd[1] = 0x8; /* UNMAP */
c6c93fdd
MP		 910 put_unaligned_be32(lba, &cmd->cmnd[2]);
911 put_unaligned_be16(nr_blocks, &cmd->cmnd[7]);
6a7b4398 912
e4200f8e 913 cmd->allowed = SD_MAX_RETRIES;
81d926e8 914 cmd->transfersize = data_len;
02d26103 915 rq->timeout = unmap ? SD_TIMEOUT : SD_WRITE_SAME_TIMEOUT;
6a7b4398 916
81d926e8 917 return scsi_init_io(cmd);
f1126e95 918}
f9d03f96 919
159b2cbf 920static blk_status_t sd_setup_write_zeroes_cmnd(struct scsi_cmnd *cmd)
02d26103
CH		 921{
922 struct request *rq = cmd->request;
923 struct scsi_device *sdp = cmd->device;
924 struct scsi_disk *sdkp = scsi_disk(rq->rq_disk);
c6c93fdd
MP		 925 u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq));
926 u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq));
02d26103 927
e4b87837 928 if (!(rq->cmd_flags & REQ_NOUNMAP)) {
e6bd9312
MP		 929 switch (sdkp->zeroing_mode) {
930 case SD_ZERO_WS16_UNMAP:
39051dd8 931 return sd_setup_write_same16_cmnd(cmd, true);
e6bd9312 932 case SD_ZERO_WS10_UNMAP:
39051dd8 933 return sd_setup_write_same10_cmnd(cmd, true);
e4b87837
CH		 934 }
935 }
c98a0eb0 936
02d26103 937 if (sdp->no_write_same)
159b2cbf 938 return BLK_STS_TARGET;
ed44fd7f 939
c6c93fdd 940 if (sdkp->ws16 || lba > 0xffffffff || nr_blocks > 0xffff)
39051dd8 941 return sd_setup_write_same16_cmnd(cmd, false);
ed44fd7f 942
39051dd8 943 return sd_setup_write_same10_cmnd(cmd, false);
f1126e95
FT		 944}
945
5db44863
MP		 946static void sd_config_write_same(struct scsi_disk *sdkp)
947{
948 struct request_queue *q = sdkp->disk->queue;
949 unsigned int logical_block_size = sdkp->device->sector_size;
5db44863
MP		 950
951 if (sdkp->device->no_write_same) {
952 sdkp->max_ws_blocks = 0;
953 goto out;
954 }
955
956 /* Some devices can not handle block counts above 0xffff despite
957 * supporting WRITE SAME(16). Consequently we default to 64k
958 * blocks per I/O unless the device explicitly advertises a
959 * bigger limit.
960 */
66c28f97
MP		 961 if (sdkp->max_ws_blocks > SD_MAX_WS10_BLOCKS)
962 sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks,
963 (u32)SD_MAX_WS16_BLOCKS);
964 else if (sdkp->ws16 || sdkp->ws10 || sdkp->device->no_report_opcodes)
965 sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks,
966 (u32)SD_MAX_WS10_BLOCKS);
967 else {
968 sdkp->device->no_write_same = 1;
969 sdkp->max_ws_blocks = 0;
970 }
5db44863 971
e6bd9312
MP		 972 if (sdkp->lbprz && sdkp->lbpws)
973 sdkp->zeroing_mode = SD_ZERO_WS16_UNMAP;
974 else if (sdkp->lbprz && sdkp->lbpws10)
975 sdkp->zeroing_mode = SD_ZERO_WS10_UNMAP;
976 else if (sdkp->max_ws_blocks)
977 sdkp->zeroing_mode = SD_ZERO_WS;
978 else
979 sdkp->zeroing_mode = SD_ZERO_WRITE;
980
b7af62a9
DLM		 981 if (sdkp->max_ws_blocks &&
982 sdkp->physical_block_size > logical_block_size) {
983 /*
984 * Reporting a maximum number of blocks that is not aligned
985 * on the device physical size would cause a large write same
986 * request to be split into physically unaligned chunks by
987 * __blkdev_issue_write_zeroes() and __blkdev_issue_write_same()
988 * even if the caller of these functions took care to align the
989 * large request. So make sure the maximum reported is aligned
990 * to the device physical block size. This is only an optional
991 * optimization for regular disks, but this is mandatory to
992 * avoid failure of large write same requests directed at
993 * sequential write required zones of host-managed ZBC disks.
994 */
995 sdkp->max_ws_blocks =
996 round_down(sdkp->max_ws_blocks,
997 bytes_to_logical(sdkp->device,
998 sdkp->physical_block_size));
999 }
1000
5db44863 1001out:
66c28f97
MP		 1002 blk_queue_max_write_same_sectors(q, sdkp->max_ws_blocks *
1003 (logical_block_size >> 9));
02d26103
CH		 1004 blk_queue_max_write_zeroes_sectors(q, sdkp->max_ws_blocks *
1005 (logical_block_size >> 9));
5db44863
MP		 1006}
1007
1008/**
1009 * sd_setup_write_same_cmnd - write the same data to multiple blocks
59b1134c 1010 * @cmd: command to prepare
5db44863 1011 *
7529fbb0
DLM		 1012 * Will set up either WRITE SAME(10) or WRITE SAME(16) depending on
1013 * the preference indicated by the target device.
5db44863 1014 **/
159b2cbf 1015static blk_status_t sd_setup_write_same_cmnd(struct scsi_cmnd *cmd)
5db44863 1016{
59b1134c
CH		 1017 struct request *rq = cmd->request;
1018 struct scsi_device *sdp = cmd->device;
5db44863
MP		 1019 struct scsi_disk *sdkp = scsi_disk(rq->rq_disk);
1020 struct bio *bio = rq->bio;
c6c93fdd
MP		 1021 u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq));
1022 u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq));
159b2cbf 1023 blk_status_t ret;
5db44863
MP		 1024
1025 if (sdkp->device->no_write_same)
159b2cbf 1026 return BLK_STS_TARGET;
5db44863 1027
a4ad39b1 1028 BUG_ON(bio_offset(bio) || bio_iovec(bio).bv_len != sdp->sector_size);
5db44863 1029
5db44863 1030 rq->timeout = SD_WRITE_SAME_TIMEOUT;
5db44863 1031
c6c93fdd 1032 if (sdkp->ws16 || lba > 0xffffffff || nr_blocks > 0xffff) {
59b1134c
CH		 1033 cmd->cmd_len = 16;
1034 cmd->cmnd[0] = WRITE_SAME_16;
c6c93fdd
MP		 1035 put_unaligned_be64(lba, &cmd->cmnd[2]);
1036 put_unaligned_be32(nr_blocks, &cmd->cmnd[10]);
5db44863 1037 } else {
59b1134c
CH		 1038 cmd->cmd_len = 10;
1039 cmd->cmnd[0] = WRITE_SAME;
c6c93fdd
MP		 1040 put_unaligned_be32(lba, &cmd->cmnd[2]);
1041 put_unaligned_be16(nr_blocks, &cmd->cmnd[7]);
5db44863
MP		 1042 }
1043
59b1134c 1044 cmd->transfersize = sdp->sector_size;
a25ee548 1045 cmd->allowed = SD_MAX_RETRIES;
08965c2e
BVA		 1046
1047 /*
1048 * For WRITE SAME the data transferred via the DATA OUT buffer is
1049 * different from the amount of data actually written to the target.
1050 *
1051 * We set up __data_len to the amount of data transferred via the
1052 * DATA OUT buffer so that blk_rq_map_sg sets up the proper S/G list
1053 * to transfer a single sector of data first, but then reset it to
1054 * the amount of data to be written right after so that the I/O path
1055 * knows how much to actually write.
1056 */
1057 rq->__data_len = sdp->sector_size;
1058 ret = scsi_init_io(cmd);
84f7a9de 1059 rq->__data_len = blk_rq_bytes(rq);
29f6ca69 1060
08965c2e 1061 return ret;
5db44863
MP		 1062}
1063
159b2cbf 1064static blk_status_t sd_setup_flush_cmnd(struct scsi_cmnd *cmd)
90467c29 1065{
a118c6c1
CH		 1066 struct request *rq = cmd->request;
1067
1068 /* flush requests don't perform I/O, zero the S/G table */
1069 memset(&cmd->sdb, 0, sizeof(cmd->sdb));
90467c29 1070
a118c6c1
CH		 1071 cmd->cmnd[0] = SYNCHRONIZE_CACHE;
1072 cmd->cmd_len = 10;
1073 cmd->transfersize = 0;
1074 cmd->allowed = SD_MAX_RETRIES;
1075
26b9fd8b 1076 rq->timeout = rq->q->rq_timeout * SD_FLUSH_TIMEOUT_MULTIPLIER;
159b2cbf 1077 return BLK_STS_OK;
90467c29
FT		 1078}
1079
78a02f49
MP		 1080static blk_status_t sd_setup_rw32_cmnd(struct scsi_cmnd *cmd, bool write,
1081 sector_t lba, unsigned int nr_blocks,
1082 unsigned char flags)
1da177e4 1083{
78a02f49
MP		 1084 cmd->cmnd = mempool_alloc(sd_cdb_pool, GFP_ATOMIC);
1085 if (unlikely(cmd->cmnd == NULL))
1086 return BLK_STS_RESOURCE;
1087
1088 cmd->cmd_len = SD_EXT_CDB_SIZE;
1089 memset(cmd->cmnd, 0, cmd->cmd_len);
1090
1091 cmd->cmnd[0] = VARIABLE_LENGTH_CMD;
1092 cmd->cmnd[7] = 0x18; /* Additional CDB len */
1093 cmd->cmnd[9] = write ? WRITE_32 : READ_32;
1094 cmd->cmnd[10] = flags;
1095 put_unaligned_be64(lba, &cmd->cmnd[12]);
1096 put_unaligned_be32(lba, &cmd->cmnd[20]); /* Expected Indirect LBA */
1097 put_unaligned_be32(nr_blocks, &cmd->cmnd[28]);
1098
1099 return BLK_STS_OK;
1100}
1101
1102static blk_status_t sd_setup_rw16_cmnd(struct scsi_cmnd *cmd, bool write,
1103 sector_t lba, unsigned int nr_blocks,
1104 unsigned char flags)
1105{
1106 cmd->cmd_len = 16;
1107 cmd->cmnd[0] = write ? WRITE_16 : READ_16;
1108 cmd->cmnd[1] = flags;
1109 cmd->cmnd[14] = 0;
1110 cmd->cmnd[15] = 0;
1111 put_unaligned_be64(lba, &cmd->cmnd[2]);
1112 put_unaligned_be32(nr_blocks, &cmd->cmnd[10]);
1113
1114 return BLK_STS_OK;
1115}
1116
1117static blk_status_t sd_setup_rw10_cmnd(struct scsi_cmnd *cmd, bool write,
1118 sector_t lba, unsigned int nr_blocks,
1119 unsigned char flags)
1120{
1121 cmd->cmd_len = 10;
1122 cmd->cmnd[0] = write ? WRITE_10 : READ_10;
1123 cmd->cmnd[1] = flags;
1124 cmd->cmnd[6] = 0;
1125 cmd->cmnd[9] = 0;
1126 put_unaligned_be32(lba, &cmd->cmnd[2]);
1127 put_unaligned_be16(nr_blocks, &cmd->cmnd[7]);
1128
1129 return BLK_STS_OK;
1130}
1131
1132static blk_status_t sd_setup_rw6_cmnd(struct scsi_cmnd *cmd, bool write,
1133 sector_t lba, unsigned int nr_blocks,
1134 unsigned char flags)
1135{
db5db4b9
BVA		 1136 /* Avoid that 0 blocks gets translated into 256 blocks. */
1137 if (WARN_ON_ONCE(nr_blocks == 0))
1138 return BLK_STS_IOERR;
1139
78a02f49
MP		 1140 if (unlikely(flags & 0x8)) {
1141 /*
1142 * This happens only if this drive failed 10byte rw
1143 * command with ILLEGAL_REQUEST during operation and
1144 * thus turned off use_10_for_rw.
1145 */
1146 scmd_printk(KERN_ERR, cmd, "FUA write on READ/WRITE(6) drive\n");
1147 return BLK_STS_IOERR;
1148 }
1149
1150 cmd->cmd_len = 6;
1151 cmd->cmnd[0] = write ? WRITE_6 : READ_6;
1152 cmd->cmnd[1] = (lba >> 16) & 0x1f;
1153 cmd->cmnd[2] = (lba >> 8) & 0xff;
1154 cmd->cmnd[3] = lba & 0xff;
1155 cmd->cmnd[4] = nr_blocks;
1156 cmd->cmnd[5] = 0;
1157
1158 return BLK_STS_OK;
1159}
1160
cf64e5a5 1161static blk_status_t sd_setup_read_write_cmnd(struct scsi_cmnd *cmd)
1da177e4 1162{
cf64e5a5
BVA		 1163 struct request *rq = cmd->request;
1164 struct scsi_device *sdp = cmd->device;
e249e42d 1165 struct scsi_disk *sdkp = scsi_disk(rq->rq_disk);
ec029758 1166 sector_t lba = sectors_to_logical(sdp, blk_rq_pos(rq));
18351070 1167 sector_t threshold;
ec029758 1168 unsigned int nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq));
ec029758 1169 unsigned int mask = logical_to_sectors(sdp, 1) - 1;
78a02f49
MP		 1170 bool write = rq_data_dir(rq) == WRITE;
1171 unsigned char protect, fua;
159b2cbf 1172 blk_status_t ret;
0cf9f4e5
XC		 1173 unsigned int dif;
1174 bool dix;
7f9a6bc4 1175
cf64e5a5 1176 ret = scsi_init_io(cmd);
159b2cbf 1177 if (ret != BLK_STS_OK)
39051dd8 1178 return ret;
7f9a6bc4 1179
e249e42d 1180 if (!scsi_device_online(sdp) || sdp->changed) {
cf64e5a5 1181 scmd_printk(KERN_ERR, cmd, "device offline or changed\n");
159b2cbf 1182 return BLK_STS_IOERR;
1da177e4
LT		 1183 }
1184
e249e42d 1185 if (blk_rq_pos(rq) + blk_rq_sectors(rq) > get_capacity(rq->rq_disk)) {
cf64e5a5 1186 scmd_printk(KERN_ERR, cmd, "access beyond end of device\n");
e249e42d
MP		 1187 return BLK_STS_IOERR;
1188 }
1189
1190 if ((blk_rq_pos(rq) & mask) || (blk_rq_sectors(rq) & mask)) {
cf64e5a5 1191 scmd_printk(KERN_ERR, cmd, "request not aligned to the logical block size\n");
159b2cbf 1192 return BLK_STS_IOERR;
1da177e4 1193 }
7f9a6bc4 1194
a0899d4d 1195 /*
ec029758
MP		 1196 * Some SD card readers can't handle accesses which touch the
1197 * last one or two logical blocks. Split accesses as needed.
a0899d4d 1198 */
ec029758 1199 threshold = sdkp->capacity - SD_LAST_BUGGY_SECTORS;
18351070 1200
c6c93fdd
MP		 1201 if (unlikely(sdp->last_sector_bug && lba + nr_blocks > threshold)) {
1202 if (lba < threshold) {
18351070 1203 /* Access up to the threshold but not beyond */
c6c93fdd 1204 nr_blocks = threshold - lba;
18351070 1205 } else {
ec029758
MP		 1206 /* Access only a single logical block */
1207 nr_blocks = 1;
18351070
LT		 1208 }
1209 }
a0899d4d 1210
78a02f49 1211 fua = rq->cmd_flags & REQ_FUA ? 0x8 : 0;
cf64e5a5
BVA		 1212 dix = scsi_prot_sg_count(cmd);
1213 dif = scsi_host_dif_capable(cmd->device->host, sdkp->protection_type);
1da177e4 1214
c611529e 1215 if (dif || dix)
cf64e5a5 1216 protect = sd_setup_protect_cmnd(cmd, dix, dif);
af55ff67 1217 else
4e7392ec
MP		 1218 protect = 0;
1219
8475c811 1220 if (protect && sdkp->protection_type == T10_PI_TYPE2_PROTECTION) {
cf64e5a5 1221 ret = sd_setup_rw32_cmnd(cmd, write, lba, nr_blocks,
78a02f49 1222 protect | fua);
c6c93fdd 1223 } else if (sdp->use_16_for_rw || (nr_blocks > 0xffff)) {
cf64e5a5 1224 ret = sd_setup_rw16_cmnd(cmd, write, lba, nr_blocks,
78a02f49 1225 protect | fua);
c6c93fdd 1226 } else if ((nr_blocks > 0xff) || (lba > 0x1fffff) ||
e249e42d 1227 sdp->use_10_for_rw || protect) {
cf64e5a5 1228 ret = sd_setup_rw10_cmnd(cmd, write, lba, nr_blocks,
78a02f49 1229 protect | fua);
1da177e4 1230 } else {
cf64e5a5 1231 ret = sd_setup_rw6_cmnd(cmd, write, lba, nr_blocks,
78a02f49 1232 protect | fua);
1da177e4 1233 }
78a02f49
MP		 1234
1235 if (unlikely(ret != BLK_STS_OK))
1236 return ret;
1da177e4
LT		 1237
1238 /*
1239 * We shouldn't disconnect in the middle of a sector, so with a dumb
1240 * host adapter, it's safe to assume that we can at least transfer
1241 * this many bytes between each connect / disconnect.
1242 */
cf64e5a5
BVA		 1243 cmd->transfersize = sdp->sector_size;
1244 cmd->underflow = nr_blocks << 9;
1245 cmd->allowed = SD_MAX_RETRIES;
1246 cmd->sdb.length = nr_blocks * sdp->sector_size;
e249e42d
MP		 1247
1248 SCSI_LOG_HLQUEUE(1,
cf64e5a5 1249 scmd_printk(KERN_INFO, cmd,
e249e42d
MP		 1250 "%s: block=%llu, count=%d\n", __func__,
1251 (unsigned long long)blk_rq_pos(rq),
1252 blk_rq_sectors(rq)));
1253 SCSI_LOG_HLQUEUE(2,
cf64e5a5 1254 scmd_printk(KERN_INFO, cmd,
e249e42d
MP		 1255 "%s %d/%u 512 byte blocks.\n",
1256 write ? "writing" : "reading", nr_blocks,
1257 blk_rq_sectors(rq)));
1da177e4 1258
1da177e4
LT		 1259 /*
1260 * This indicates that the command is ready from our end to be
1261 * queued.
1262 */
159b2cbf 1263 return BLK_STS_OK;
1da177e4
LT		 1264}
1265
159b2cbf 1266static blk_status_t sd_init_command(struct scsi_cmnd *cmd)
87949eee
CH		 1267{
1268 struct request *rq = cmd->request;
1269
c2df40df
MC		 1270 switch (req_op(rq)) {
1271 case REQ_OP_DISCARD:
81d926e8
CH		 1272 switch (scsi_disk(rq->rq_disk)->provisioning_mode) {
1273 case SD_LBP_UNMAP:
1274 return sd_setup_unmap_cmnd(cmd);
1275 case SD_LBP_WS16:
02d26103 1276 return sd_setup_write_same16_cmnd(cmd, true);
81d926e8
CH		 1277 case SD_LBP_WS10:
1278 return sd_setup_write_same10_cmnd(cmd, true);
1279 case SD_LBP_ZERO:
1280 return sd_setup_write_same10_cmnd(cmd, false);
1281 default:
159b2cbf 1282 return BLK_STS_TARGET;
81d926e8 1283 }
02d26103
CH		 1284 case REQ_OP_WRITE_ZEROES:
1285 return sd_setup_write_zeroes_cmnd(cmd);
c2df40df 1286 case REQ_OP_WRITE_SAME:
87949eee 1287 return sd_setup_write_same_cmnd(cmd);
3a5e02ce 1288 case REQ_OP_FLUSH:
87949eee 1289 return sd_setup_flush_cmnd(cmd);
c2df40df
MC		 1290 case REQ_OP_READ:
1291 case REQ_OP_WRITE:
87949eee 1292 return sd_setup_read_write_cmnd(cmd);
89d94756 1293 case REQ_OP_ZONE_RESET:
ad512f20
AJ		 1294 return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_RESET_WRITE_POINTER,
1295 false);
d81e9d49 1296 case REQ_OP_ZONE_RESET_ALL:
ad512f20
AJ		 1297 return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_RESET_WRITE_POINTER,
1298 true);
1299 case REQ_OP_ZONE_OPEN:
1300 return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_OPEN_ZONE, false);
1301 case REQ_OP_ZONE_CLOSE:
1302 return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_CLOSE_ZONE, false);
1303 case REQ_OP_ZONE_FINISH:
1304 return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_FINISH_ZONE, false);
c2df40df 1305 default:
f1f1fada 1306 WARN_ON_ONCE(1);
159b2cbf 1307 return BLK_STS_NOTSUPP;
c2df40df 1308 }
87949eee
CH		 1309}
1310
1311static void sd_uninit_command(struct scsi_cmnd *SCpnt)
1312{
1313 struct request *rq = SCpnt->request;
14e3062f 1314 u8 *cmnd;
87949eee 1315
f9d03f96 1316 if (rq->rq_flags & RQF_SPECIAL_PAYLOAD)
61cce6f6 1317 mempool_free(rq->special_vec.bv_page, sd_page_pool);
87949eee 1318
82ed4db4 1319 if (SCpnt->cmnd != scsi_req(rq)->cmd) {
14e3062f 1320 cmnd = SCpnt->cmnd;
87949eee
CH		 1321 SCpnt->cmnd = NULL;
1322 SCpnt->cmd_len = 0;
14e3062f 1323 mempool_free(cmnd, sd_cdb_pool);
87949eee
CH		 1324 }
1325}
1326
1da177e4
LT		 1327/**
1328 * sd_open - open a scsi disk device
7529fbb0
DLM		 1329 * @bdev: Block device of the scsi disk to open
1330 * @mode: FMODE_* mask
1da177e4
LT		 1331 *
1332 * Returns 0 if successful. Returns a negated errno value in case
1333 * of error.
1334 *
1335 * Note: This can be called from a user context (e.g. fsck(1) )
1336 * or from within the kernel (e.g. as a result of a mount(1) ).
1337 * In the latter case @inode and @filp carry an abridged amount
1338 * of information as noted above.
409f3499
AB		 1339 *
1340 * Locking: called with bdev->bd_mutex held.
1da177e4 1341 **/
0338e291 1342static int sd_open(struct block_device *bdev, fmode_t mode)
1da177e4 1343{
0338e291 1344 struct scsi_disk *sdkp = scsi_disk_get(bdev->bd_disk);
1da177e4
LT		 1345 struct scsi_device *sdev;
1346 int retval;
1347
0338e291 1348 if (!sdkp)
1da177e4
LT		 1349 return -ENXIO;
1350
fa0d34be 1351 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_open\n"));
1da177e4
LT		 1352
1353 sdev = sdkp->device;
1354
1355 /*
1356 * If the device is in error recovery, wait until it is done.
1357 * If the device is offline, then disallow any access to it.
1358 */
1359 retval = -ENXIO;
1360 if (!scsi_block_when_processing_errors(sdev))
1361 goto error_out;
1362
1363 if (sdev->removable || sdkp->write_prot)
0338e291 1364 check_disk_change(bdev);
1da177e4
LT		 1365
1366 /*
1367 * If the drive is empty, just let the open fail.
1368 */
1369 retval = -ENOMEDIUM;
0338e291 1370 if (sdev->removable && !sdkp->media_present && !(mode & FMODE_NDELAY))
1da177e4
LT		 1371 goto error_out;
1372
1373 /*
1374 * If the device has the write protect tab set, have the open fail
1375 * if the user expects to be able to write to the thing.
1376 */
1377 retval = -EROFS;
0338e291 1378 if (sdkp->write_prot && (mode & FMODE_WRITE))
1da177e4
LT		 1379 goto error_out;
1380
1381 /*
1382 * It is possible that the disk changing stuff resulted in
1383 * the device being taken offline. If this is the case,
1384 * report this to the user, and don't pretend that the
1385 * open actually succeeded.
1386 */
1387 retval = -ENXIO;
1388 if (!scsi_device_online(sdev))
1389 goto error_out;
1390
409f3499 1391 if ((atomic_inc_return(&sdkp->openers) == 1) && sdev->removable) {
1da177e4
LT		 1392 if (scsi_block_when_processing_errors(sdev))
1393 scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT);
1394 }
1395
1396 return 0;
1397
1398error_out:
1399 scsi_disk_put(sdkp);
1400 return retval;
1401}
1402
1403/**
1404 * sd_release - invoked when the (last) close(2) is called on this
1405 * scsi disk.
7529fbb0
DLM		 1406 * @disk: disk to release
1407 * @mode: FMODE_* mask
1da177e4
LT		 1408 *
1409 * Returns 0.
1410 *
1411 * Note: may block (uninterruptible) if error recovery is underway
1412 * on this disk.
409f3499
AB		 1413 *
1414 * Locking: called with bdev->bd_mutex held.
1da177e4 1415 **/
db2a144b 1416static void sd_release(struct gendisk *disk, fmode_t mode)
1da177e4 1417{
1da177e4
LT		 1418 struct scsi_disk *sdkp = scsi_disk(disk);
1419 struct scsi_device *sdev = sdkp->device;
1420
56937f7b 1421 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_release\n"));
1da177e4 1422
7e443312 1423 if (atomic_dec_return(&sdkp->openers) == 0 && sdev->removable) {
1da177e4
LT		 1424 if (scsi_block_when_processing_errors(sdev))
1425 scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW);
1426 }
1427
1da177e4 1428 scsi_disk_put(sdkp);
1da177e4
LT		 1429}
1430
a885c8c4 1431static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1da177e4
LT		 1432{
1433 struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk);
1434 struct scsi_device *sdp = sdkp->device;
1435 struct Scsi_Host *host = sdp->host;
f08bb1e0 1436 sector_t capacity = logical_to_sectors(sdp, sdkp->capacity);
1da177e4
LT		 1437 int diskinfo[4];
1438
1439 /* default to most commonly used values */
f08bb1e0
MP		 1440 diskinfo[0] = 0x40; /* 1 << 6 */
1441 diskinfo[1] = 0x20; /* 1 << 5 */
1442 diskinfo[2] = capacity >> 11;
1443
1da177e4
LT		 1444 /* override with calculated, extended default, or driver values */
1445 if (host->hostt->bios_param)
f08bb1e0 1446 host->hostt->bios_param(sdp, bdev, capacity, diskinfo);
1da177e4 1447 else
f08bb1e0 1448 scsicam_bios_param(bdev, capacity, diskinfo);
1da177e4 1449
a885c8c4
CH		 1450 geo->heads = diskinfo[0];
1451 geo->sectors = diskinfo[1];
1452 geo->cylinders = diskinfo[2];
1da177e4
LT		 1453 return 0;
1454}
1455
1456/**
1457 * sd_ioctl - process an ioctl
7529fbb0
DLM		 1458 * @bdev: target block device
1459 * @mode: FMODE_* mask
1da177e4
LT		 1460 * @cmd: ioctl command number
1461 * @arg: this is third argument given to ioctl(2) system call.
1462 * Often contains a pointer.
1463 *
25985edc 1464 * Returns 0 if successful (some ioctls return positive numbers on
1da177e4
LT		 1465 * success as well). Returns a negated errno value in case of error.
1466 *
1467 * Note: most ioctls are forward onto the block subsystem or further
3a4fa0a2 1468 * down in the scsi subsystem.
1da177e4 1469 **/
0338e291 1470static int sd_ioctl(struct block_device *bdev, fmode_t mode,
1da177e4
LT		 1471 unsigned int cmd, unsigned long arg)
1472{
1da177e4 1473 struct gendisk *disk = bdev->bd_disk;
fe2d1851
NN		 1474 struct scsi_disk *sdkp = scsi_disk(disk);
1475 struct scsi_device *sdp = sdkp->device;
1da177e4
LT		 1476 void __user *p = (void __user *)arg;
1477 int error;
1478
fe2d1851
NN		 1479 SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO, sdkp, "sd_ioctl: disk=%s, "
1480 "cmd=0x%x\n", disk->disk_name, cmd));
1da177e4 1481
0bfc96cb
PB		 1482 error = scsi_verify_blk_ioctl(bdev, cmd);
1483 if (error < 0)
1484 return error;
1485
1da177e4
LT		 1486 /*
1487 * If we are in the middle of error recovery, don't let anyone
1488 * else try and use this device. Also, if error recovery fails, it
1489 * may try and take the device offline, in which case all further
1490 * access to the device is prohibited.
1491 */
906d15fb
CH		 1492 error = scsi_ioctl_block_when_processing_errors(sdp, cmd,
1493 (mode & FMODE_NDELAY) != 0);
1494 if (error)
8a6cfeb6 1495 goto out;
1da177e4 1496
d80210f2
CH		 1497 if (is_sed_ioctl(cmd))
1498 return sed_ioctl(sdkp->opal_dev, cmd, p);
1499
1da177e4
LT		 1500 /*
1501 * Send SCSI addressing ioctls directly to mid level, send other
1502 * ioctls to block level and then onto mid level if they can't be
1503 * resolved.
1504 */
1505 switch (cmd) {
1506 case SCSI_IOCTL_GET_IDLUN:
1507 case SCSI_IOCTL_GET_BUS_NUMBER:
8a6cfeb6
AB		 1508 error = scsi_ioctl(sdp, cmd, p);
1509 break;
1da177e4 1510 default:
577ebb37 1511 error = scsi_cmd_blk_ioctl(bdev, mode, cmd, p);
1da177e4 1512 if (error != -ENOTTY)
8a6cfeb6
AB		 1513 break;
1514 error = scsi_ioctl(sdp, cmd, p);
1515 break;
1da177e4 1516 }
8a6cfeb6 1517out:
8a6cfeb6 1518 return error;
1da177e4
LT		 1519}
1520
1521static void set_media_not_present(struct scsi_disk *sdkp)
1522{
2bae0093
TH		 1523 if (sdkp->media_present)
1524 sdkp->device->changed = 1;
1525
1526 if (sdkp->device->removable) {
1527 sdkp->media_present = 0;
1528 sdkp->capacity = 0;
1529 }
1530}
1531
1532static int media_not_present(struct scsi_disk *sdkp,
1533 struct scsi_sense_hdr *sshdr)
1534{
1535 if (!scsi_sense_valid(sshdr))
1536 return 0;
1537
1538 /* not invoked for commands that could return deferred errors */
1539 switch (sshdr->sense_key) {
1540 case UNIT_ATTENTION:
1541 case NOT_READY:
1542 /* medium not present */
1543 if (sshdr->asc == 0x3A) {
1544 set_media_not_present(sdkp);
1545 return 1;
1546 }
1547 }
1548 return 0;
1da177e4
LT		 1549}
1550
1551/**
2bae0093
TH		 1552 * sd_check_events - check media events
1553 * @disk: kernel device descriptor
1554 * @clearing: disk events currently being cleared
1da177e4 1555 *
2bae0093 1556 * Returns mask of DISK_EVENT_*.
1da177e4
LT		 1557 *
1558 * Note: this function is invoked from the block subsystem.
1559 **/
2bae0093 1560static unsigned int sd_check_events(struct gendisk *disk, unsigned int clearing)
1da177e4 1561{
eb72d0bb
HR		 1562 struct scsi_disk *sdkp = scsi_disk_get(disk);
1563 struct scsi_device *sdp;
1da177e4
LT		 1564 int retval;
1565
eb72d0bb
HR		 1566 if (!sdkp)
1567 return 0;
1568
1569 sdp = sdkp->device;
2bae0093 1570 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_check_events\n"));
1da177e4
LT		 1571
1572 /*
1573 * If the device is offline, don't send any commands - just pretend as
1574 * if the command failed. If the device ever comes back online, we
1575 * can deal with it then. It is only because of unrecoverable errors
1576 * that we would ever take a device offline in the first place.
1577 */
285e9670
KS		 1578 if (!scsi_device_online(sdp)) {
1579 set_media_not_present(sdkp);
285e9670
KS		 1580 goto out;
1581 }
1da177e4
LT		 1582
1583 /*
1584 * Using TEST_UNIT_READY enables differentiation between drive with
1585 * no cartridge loaded - NOT READY, drive with changed cartridge -
1586 * UNIT ATTENTION, or with same cartridge - GOOD STATUS.
1587 *
1588 * Drives that auto spin down. eg iomega jaz 1G, will be started
1589 * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever
1590 * sd_revalidate() is called.
1591 */
001aac25 1592 if (scsi_block_when_processing_errors(sdp)) {
6fa2b8f9
CH		 1593 struct scsi_sense_hdr sshdr = { 0, };
1594
001aac25 1595 retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, SD_MAX_RETRIES,
6fa2b8f9 1596 &sshdr);
1da177e4 1597
6fa2b8f9
CH		 1598 /* failed to execute TUR, assume media not present */
1599 if (host_byte(retval)) {
1600 set_media_not_present(sdkp);
1601 goto out;
1602 }
1da177e4 1603
6fa2b8f9
CH		 1604 if (media_not_present(sdkp, &sshdr))
1605 goto out;
1606 }
2bae0093 1607
1da177e4
LT		 1608 /*
1609 * For removable scsi disk we have to recognise the presence
2bae0093 1610 * of a disk in the drive.
1da177e4 1611 */
2bae0093
TH		 1612 if (!sdkp->media_present)
1613 sdp->changed = 1;
1da177e4 1614 sdkp->media_present = 1;
285e9670 1615out:
3ff5588d 1616 /*
2bae0093 1617 * sdp->changed is set under the following conditions:
3ff5588d 1618 *
2bae0093
TH		 1619 * Medium present state has changed in either direction.
1620 * Device has indicated UNIT_ATTENTION.
3ff5588d 1621 */
2bae0093
TH		 1622 retval = sdp->changed ? DISK_EVENT_MEDIA_CHANGE : 0;
1623 sdp->changed = 0;
eb72d0bb 1624 scsi_disk_put(sdkp);
1da177e4 1625 return retval;
1da177e4
LT		 1626}
1627
4fa83244 1628static int sd_sync_cache(struct scsi_disk *sdkp, struct scsi_sense_hdr *sshdr)
1da177e4 1629{
1da177e4 1630 int retries, res;
e73aec82 1631 struct scsi_device *sdp = sdkp->device;
7e660100
JB		 1632 const int timeout = sdp->request_queue->rq_timeout
1633 * SD_FLUSH_TIMEOUT_MULTIPLIER;
4fa83244 1634 struct scsi_sense_hdr my_sshdr;
1da177e4
LT		 1635
1636 if (!scsi_device_online(sdp))
1637 return -ENODEV;
1638
4fa83244
DB		 1639 /* caller might not be interested in sense, but we need it */
1640 if (!sshdr)
1641 sshdr = &my_sshdr;
1642
1da177e4
LT		 1643 for (retries = 3; retries > 0; --retries) {
1644 unsigned char cmd[10] = { 0 };
1645
1646 cmd[0] = SYNCHRONIZE_CACHE;
1647 /*
1648 * Leave the rest of the command zero to indicate
1649 * flush everything.
1650 */
4fa83244 1651 res = scsi_execute(sdp, cmd, DMA_NONE, NULL, 0, NULL, sshdr,
fcbfffe2 1652 timeout, SD_MAX_RETRIES, 0, RQF_PM, NULL);
ea73a9f2 1653 if (res == 0)
1da177e4
LT		 1654 break;
1655 }
1656
e73aec82 1657 if (res) {
ef61329d 1658 sd_print_result(sdkp, "Synchronize Cache(10) failed", res);
95897910 1659
c65be1a6 1660 if (driver_byte(res) == DRIVER_SENSE)
4fa83244
DB		 1661 sd_print_sense_hdr(sdkp, sshdr);
1662
95897910 1663 /* we need to evaluate the error return */
4fa83244
DB		 1664 if (scsi_sense_valid(sshdr) &&
1665 (sshdr->asc == 0x3a || /* medium not present */
21e3d6c8
ON		 1666 sshdr->asc == 0x20 || /* invalid command */
1667 (sshdr->asc == 0x74 && sshdr->ascq == 0x71))) /* drive is password locked */
95897910
ON		 1668 /* this is no error here */
1669 return 0;
1670
1671 switch (host_byte(res)) {
1672 /* ignore errors due to racing a disconnection */
1673 case DID_BAD_TARGET:
1674 case DID_NO_CONNECT:
1675 return 0;
1676 /* signal the upper layer it might try again */
1677 case DID_BUS_BUSY:
1678 case DID_IMM_RETRY:
1679 case DID_REQUEUE:
1680 case DID_SOFT_ERROR:
1681 return -EBUSY;
1682 default:
1683 return -EIO;
1684 }
1da177e4 1685 }
3721050a 1686 return 0;
1da177e4
LT		 1687}
1688
1da177e4
LT		 1689static void sd_rescan(struct device *dev)
1690{
3d9a1f53 1691 struct scsi_disk *sdkp = dev_get_drvdata(dev);
39b7f1e2 1692
3d9a1f53 1693 revalidate_disk(sdkp->disk);
1da177e4
LT		 1694}
1695
1696
1697#ifdef CONFIG_COMPAT
1698/*
1699 * This gets directly called from VFS. When the ioctl
1700 * is not recognized we go back to the other translation paths.
1701 */
0338e291
AV		 1702static int sd_compat_ioctl(struct block_device *bdev, fmode_t mode,
1703 unsigned int cmd, unsigned long arg)
1da177e4 1704{
0338e291 1705 struct scsi_device *sdev = scsi_disk(bdev->bd_disk)->device;
21a9d4c9 1706 int error;
1da177e4 1707
21a9d4c9
CH		 1708 error = scsi_ioctl_block_when_processing_errors(sdev, cmd,
1709 (mode & FMODE_NDELAY) != 0);
1710 if (error)
1711 return error;
1da177e4 1712
1da177e4
LT		 1713 /*
1714 * Let the static ioctl translation table take care of it.
1715 */
21a9d4c9
CH		 1716 if (!sdev->host->hostt->compat_ioctl)
1717 return -ENOIOCTLCMD;
1718 return sdev->host->hostt->compat_ioctl(sdev, cmd, (void __user *)arg);
1da177e4
LT		 1719}
1720#endif
1721
924d55b0
CH		 1722static char sd_pr_type(enum pr_type type)
1723{
1724 switch (type) {
1725 case PR_WRITE_EXCLUSIVE:
1726 return 0x01;
1727 case PR_EXCLUSIVE_ACCESS:
1728 return 0x03;
1729 case PR_WRITE_EXCLUSIVE_REG_ONLY:
1730 return 0x05;
1731 case PR_EXCLUSIVE_ACCESS_REG_ONLY:
1732 return 0x06;
1733 case PR_WRITE_EXCLUSIVE_ALL_REGS:
1734 return 0x07;
1735 case PR_EXCLUSIVE_ACCESS_ALL_REGS:
1736 return 0x08;
1737 default:
1738 return 0;
1739 }
1740};
1741
1742static int sd_pr_command(struct block_device *bdev, u8 sa,
1743 u64 key, u64 sa_key, u8 type, u8 flags)
1744{
1745 struct scsi_device *sdev = scsi_disk(bdev->bd_disk)->device;
1746 struct scsi_sense_hdr sshdr;
1747 int result;
1748 u8 cmd[16] = { 0, };
1749 u8 data[24] = { 0, };
1750
1751 cmd[0] = PERSISTENT_RESERVE_OUT;
1752 cmd[1] = sa;
1753 cmd[2] = type;
1754 put_unaligned_be32(sizeof(data), &cmd[5]);
1755
1756 put_unaligned_be64(key, &data[0]);
1757 put_unaligned_be64(sa_key, &data[8]);
1758 data[20] = flags;
1759
1760 result = scsi_execute_req(sdev, cmd, DMA_TO_DEVICE, &data, sizeof(data),
1761 &sshdr, SD_TIMEOUT, SD_MAX_RETRIES, NULL);
1762
c65be1a6
JT		 1763 if (driver_byte(result) == DRIVER_SENSE &&
1764 scsi_sense_valid(&sshdr)) {
924d55b0
CH		 1765 sdev_printk(KERN_INFO, sdev, "PR command failed: %d\n", result);
1766 scsi_print_sense_hdr(sdev, NULL, &sshdr);
1767 }
1768
1769 return result;
1770}
1771
1772static int sd_pr_register(struct block_device *bdev, u64 old_key, u64 new_key,
1773 u32 flags)
1774{
1775 if (flags & ~PR_FL_IGNORE_KEY)
1776 return -EOPNOTSUPP;
1777 return sd_pr_command(bdev, (flags & PR_FL_IGNORE_KEY) ? 0x06 : 0x00,
1778 old_key, new_key, 0,
01f90dd9 1779 (1 << 0) /* APTPL */);
924d55b0
CH		 1780}
1781
1782static int sd_pr_reserve(struct block_device *bdev, u64 key, enum pr_type type,
1783 u32 flags)
1784{
1785 if (flags)
1786 return -EOPNOTSUPP;
1787 return sd_pr_command(bdev, 0x01, key, 0, sd_pr_type(type), 0);
1788}
1789
1790static int sd_pr_release(struct block_device *bdev, u64 key, enum pr_type type)
1791{
1792 return sd_pr_command(bdev, 0x02, key, 0, sd_pr_type(type), 0);
1793}
1794
1795static int sd_pr_preempt(struct block_device *bdev, u64 old_key, u64 new_key,
1796 enum pr_type type, bool abort)
1797{
1798 return sd_pr_command(bdev, abort ? 0x05 : 0x04, old_key, new_key,
1799 sd_pr_type(type), 0);
1800}
1801
1802static int sd_pr_clear(struct block_device *bdev, u64 key)
1803{
1804 return sd_pr_command(bdev, 0x03, key, 0, 0, 0);
1805}
1806
1807static const struct pr_ops sd_pr_ops = {
1808 .pr_register = sd_pr_register,
1809 .pr_reserve = sd_pr_reserve,
1810 .pr_release = sd_pr_release,
1811 .pr_preempt = sd_pr_preempt,
1812 .pr_clear = sd_pr_clear,
1813};
1814
83d5cde4 1815static const struct block_device_operations sd_fops = {
1da177e4 1816 .owner = THIS_MODULE,
0338e291
AV		 1817 .open = sd_open,
1818 .release = sd_release,
8a6cfeb6 1819 .ioctl = sd_ioctl,
a885c8c4 1820 .getgeo = sd_getgeo,
1da177e4 1821#ifdef CONFIG_COMPAT
0338e291 1822 .compat_ioctl = sd_compat_ioctl,
1da177e4 1823#endif
2bae0093 1824 .check_events = sd_check_events,
1da177e4 1825 .revalidate_disk = sd_revalidate_disk,
72ec24bd 1826 .unlock_native_capacity = sd_unlock_native_capacity,
e76239a3 1827 .report_zones = sd_zbc_report_zones,
924d55b0 1828 .pr_ops = &sd_pr_ops,
1da177e4
LT		 1829};
1830
7a38dc0b
HR		 1831/**
1832 * sd_eh_reset - reset error handling callback
1833 * @scmd: sd-issued command that has failed
1834 *
1835 * This function is called by the SCSI midlayer before starting
1836 * SCSI EH. When counting medium access failures we have to be
1837 * careful to register it only only once per device and SCSI EH run;
1838 * there might be several timed out commands which will cause the
1839 * 'max_medium_access_timeouts' counter to trigger after the first
1840 * SCSI EH run already and set the device to offline.
1841 * So this function resets the internal counter before starting SCSI EH.
1842 **/
1843static void sd_eh_reset(struct scsi_cmnd *scmd)
1844{
1845 struct scsi_disk *sdkp = scsi_disk(scmd->request->rq_disk);
1846
1847 /* New SCSI EH run, reset gate variable */
1848 sdkp->ignore_medium_access_errors = false;
1849}
1850
18a4d0a2
MP		 1851/**
1852 * sd_eh_action - error handling callback
1853 * @scmd: sd-issued command that has failed
18a4d0a2
MP		 1854 * @eh_disp: The recovery disposition suggested by the midlayer
1855 *
2451079b
JB		 1856 * This function is called by the SCSI midlayer upon completion of an
1857 * error test command (currently TEST UNIT READY). The result of sending
1858 * the eh command is passed in eh_disp. We're looking for devices that
1859 * fail medium access commands but are OK with non access commands like
1860 * test unit ready (so wrongly see the device as having a successful
1861 * recovery)
18a4d0a2 1862 **/
2451079b 1863static int sd_eh_action(struct scsi_cmnd *scmd, int eh_disp)
18a4d0a2
MP		 1864{
1865 struct scsi_disk *sdkp = scsi_disk(scmd->request->rq_disk);
0db6ca8a 1866 struct scsi_device *sdev = scmd->device;
18a4d0a2 1867
0db6ca8a 1868 if (!scsi_device_online(sdev) ||
2451079b
JB		 1869 !scsi_medium_access_command(scmd) ||
1870 host_byte(scmd->result) != DID_TIME_OUT ||
1871 eh_disp != SUCCESS)
18a4d0a2
MP		 1872 return eh_disp;
1873
1874 /*
1875 * The device has timed out executing a medium access command.
1876 * However, the TEST UNIT READY command sent during error
1877 * handling completed successfully. Either the device is in the
1878 * process of recovering or has it suffered an internal failure
1879 * that prevents access to the storage medium.
1880 */
7a38dc0b
HR		 1881 if (!sdkp->ignore_medium_access_errors) {
1882 sdkp->medium_access_timed_out++;
1883 sdkp->ignore_medium_access_errors = true;
1884 }
18a4d0a2
MP		 1885
1886 /*
1887 * If the device keeps failing read/write commands but TEST UNIT
1888 * READY always completes successfully we assume that medium
1889 * access is no longer possible and take the device offline.
1890 */
1891 if (sdkp->medium_access_timed_out >= sdkp->max_medium_access_timeouts) {
1892 scmd_printk(KERN_ERR, scmd,
1893 "Medium access timeout failure. Offlining disk!\n");
0db6ca8a
BVA		 1894 mutex_lock(&sdev->state_mutex);
1895 scsi_device_set_state(sdev, SDEV_OFFLINE);
1896 mutex_unlock(&sdev->state_mutex);
18a4d0a2 1897
e8f8d50e 1898 return SUCCESS;
18a4d0a2
MP		 1899 }
1900
1901 return eh_disp;
1902}
1903
af55ff67
MP		 1904static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd)
1905{
6eadc612
DLM		 1906 struct request *req = scmd->request;
1907 struct scsi_device *sdev = scmd->device;
1908 unsigned int transferred, good_bytes;
1909 u64 start_lba, end_lba, bad_lba;
1910
a8733c7b 1911 /*
6eadc612
DLM		 1912 * Some commands have a payload smaller than the device logical
1913 * block size (e.g. INQUIRY on a 4K disk).
a8733c7b 1914 */
6eadc612 1915 if (scsi_bufflen(scmd) <= sdev->sector_size)
af55ff67
MP		 1916 return 0;
1917
6eadc612
DLM		 1918 /* Check if we have a 'bad_lba' information */
1919 if (!scsi_get_sense_info_fld(scmd->sense_buffer,
1920 SCSI_SENSE_BUFFERSIZE,
1921 &bad_lba))
af55ff67
MP		 1922 return 0;
1923
6eadc612
DLM		 1924 /*
1925 * If the bad lba was reported incorrectly, we have no idea where
af55ff67
MP		 1926 * the error is.
1927 */
6eadc612
DLM		 1928 start_lba = sectors_to_logical(sdev, blk_rq_pos(req));
1929 end_lba = start_lba + bytes_to_logical(sdev, scsi_bufflen(scmd));
1930 if (bad_lba < start_lba || bad_lba >= end_lba)
af55ff67
MP		 1931 return 0;
1932
6eadc612
DLM		 1933 /*
1934 * resid is optional but mostly filled in. When it's unused,
1935 * its value is zero, so we assume the whole buffer transferred
af55ff67 1936 */
6eadc612
DLM		 1937 transferred = scsi_bufflen(scmd) - scsi_get_resid(scmd);
1938
1939 /* This computation should always be done in terms of the
1940 * resolution of the device's medium.
af55ff67 1941 */
6eadc612
DLM		 1942 good_bytes = logical_to_bytes(sdev, bad_lba - start_lba);
1943
a8733c7b 1944 return min(good_bytes, transferred);
af55ff67
MP		 1945}
1946
1da177e4 1947/**
7b3d9545 1948 * sd_done - bottom half handler: called when the lower level
1da177e4
LT		 1949 * driver has completed (successfully or otherwise) a scsi command.
1950 * @SCpnt: mid-level's per command structure.
1951 *
1952 * Note: potentially run from within an ISR. Must not block.
1953 **/
7b3d9545 1954static int sd_done(struct scsi_cmnd *SCpnt)
1da177e4
LT		 1955{
1956 int result = SCpnt->result;
af55ff67 1957 unsigned int good_bytes = result ? 0 : scsi_bufflen(SCpnt);
c46f0917
DLM		 1958 unsigned int sector_size = SCpnt->device->sector_size;
1959 unsigned int resid;
1da177e4 1960 struct scsi_sense_hdr sshdr;
4e7392ec 1961 struct scsi_disk *sdkp = scsi_disk(SCpnt->request->rq_disk);
26e85fcd 1962 struct request *req = SCpnt->request;
1da177e4
LT		 1963 int sense_valid = 0;
1964 int sense_deferred = 0;
1da177e4 1965
89d94756
HR		 1966 switch (req_op(req)) {
1967 case REQ_OP_DISCARD:
02d26103 1968 case REQ_OP_WRITE_ZEROES:
89d94756
HR		 1969 case REQ_OP_WRITE_SAME:
1970 case REQ_OP_ZONE_RESET:
d81e9d49 1971 case REQ_OP_ZONE_RESET_ALL:
ad512f20
AJ		 1972 case REQ_OP_ZONE_OPEN:
1973 case REQ_OP_ZONE_CLOSE:
1974 case REQ_OP_ZONE_FINISH:
26e85fcd
MP		 1975 if (!result) {
1976 good_bytes = blk_rq_bytes(req);
1977 scsi_set_resid(SCpnt, 0);
1978 } else {
1979 good_bytes = 0;
1980 scsi_set_resid(SCpnt, blk_rq_bytes(req));
89d94756
HR		 1981 }
1982 break;
c46f0917
DLM		 1983 default:
1984 /*
1985 * In case of bogus fw or device, we could end up having
1986 * an unaligned partial completion. Check this here and force
1987 * alignment.
1988 */
1989 resid = scsi_get_resid(SCpnt);
1990 if (resid & (sector_size - 1)) {
1991 sd_printk(KERN_INFO, sdkp,
1992 "Unaligned partial completion (resid=%u, sector_sz=%u)\n",
1993 resid, sector_size);
670d8be2 1994 scsi_print_command(SCpnt);
c46f0917
DLM		 1995 resid = min(scsi_bufflen(SCpnt),
1996 round_up(resid, sector_size));
1997 scsi_set_resid(SCpnt, resid);
1998 }
26e85fcd 1999 }
6a32a8ae 2000
1da177e4
LT		 2001 if (result) {
2002 sense_valid = scsi_command_normalize_sense(SCpnt, &sshdr);
2003 if (sense_valid)
2004 sense_deferred = scsi_sense_is_deferred(&sshdr);
2005 }
2a863ba8
DJ		 2006 sdkp->medium_access_timed_out = 0;
2007
03aba2f7
LT		 2008 if (driver_byte(result) != DRIVER_SENSE &&
2009 (!sense_valid || sense_deferred))
2010 goto out;
2011
2012 switch (sshdr.sense_key) {
2013 case HARDWARE_ERROR:
2014 case MEDIUM_ERROR:
af55ff67 2015 good_bytes = sd_completed_bytes(SCpnt);
03aba2f7
LT		 2016 break;
2017 case RECOVERED_ERROR:
af55ff67
MP		 2018 good_bytes = scsi_bufflen(SCpnt);
2019 break;
10dab226
JW		 2020 case NO_SENSE:
2021 /* This indicates a false check condition, so ignore it. An
2022 * unknown amount of data was transferred so treat it as an
2023 * error.
2024 */
10dab226
JW		 2025 SCpnt->result = 0;
2026 memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
2027 break;
c98a0eb0
MP		 2028 case ABORTED_COMMAND:
2029 if (sshdr.asc == 0x10) /* DIF: Target detected corruption */
2030 good_bytes = sd_completed_bytes(SCpnt);
2031 break;
2032 case ILLEGAL_REQUEST:
d227ec26
CH		 2033 switch (sshdr.asc) {
2034 case 0x10: /* DIX: Host detected corruption */
af55ff67 2035 good_bytes = sd_completed_bytes(SCpnt);
d227ec26
CH		 2036 break;
2037 case 0x20: /* INVALID COMMAND OPCODE */
2038 case 0x24: /* INVALID FIELD IN CDB */
2039 switch (SCpnt->cmnd[0]) {
5db44863
MP		 2040 case UNMAP:
2041 sd_config_discard(sdkp, SD_LBP_DISABLE);
2042 break;
2043 case WRITE_SAME_16:
2044 case WRITE_SAME:
d227ec26 2045 if (SCpnt->cmnd[1] & 8) { /* UNMAP */
5db44863 2046 sd_config_discard(sdkp, SD_LBP_DISABLE);
d227ec26 2047 } else {
5db44863
MP		 2048 sdkp->device->no_write_same = 1;
2049 sd_config_write_same(sdkp);
e8064021 2050 req->rq_flags |= RQF_QUIET;
5db44863 2051 }
d227ec26 2052 break;
5db44863
MP		 2053 }
2054 }
03aba2f7
LT		 2055 break;
2056 default:
2057 break;
1da177e4 2058 }
89d94756 2059
03aba2f7 2060 out:
89d94756
HR		 2061 if (sd_is_zoned(sdkp))
2062 sd_zbc_complete(SCpnt, good_bytes, &sshdr);
2063
ef61329d
HR		 2064 SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO, SCpnt,
2065 "sd_done: completed %d of %d bytes\n",
2066 good_bytes, scsi_bufflen(SCpnt)));
2067
7b3d9545 2068 return good_bytes;
1da177e4
LT		 2069}
2070
1da177e4
LT		 2071/*
2072 * spinup disk - called only in sd_revalidate_disk()
2073 */
2074static void
e73aec82 2075sd_spinup_disk(struct scsi_disk *sdkp)
ea73a9f2 2076{
1da177e4 2077 unsigned char cmd[10];
4451e472 2078 unsigned long spintime_expire = 0;
1da177e4
LT		 2079 int retries, spintime;
2080 unsigned int the_result;
2081 struct scsi_sense_hdr sshdr;
2082 int sense_valid = 0;
2083
2084 spintime = 0;
2085
2086 /* Spin up drives, as required. Only do this at boot time */
2087 /* Spinup needs to be done for module loads too. */
2088 do {
2089 retries = 0;
2090
2091 do {
2092 cmd[0] = TEST_UNIT_READY;
2093 memset((void *) &cmd[1], 0, 9);
2094
ea73a9f2
JB		 2095 the_result = scsi_execute_req(sdkp->device, cmd,
2096 DMA_NONE, NULL, 0,
2097 &sshdr, SD_TIMEOUT,
f4f4e47e 2098 SD_MAX_RETRIES, NULL);
1da177e4 2099
b4d38e38
AS		 2100 /*
2101 * If the drive has indicated to us that it
2102 * doesn't have any media in it, don't bother
2103 * with any more polling.
2104 */
2105 if (media_not_present(sdkp, &sshdr))
2106 return;
2107
1da177e4 2108 if (the_result)
ea73a9f2 2109 sense_valid = scsi_sense_valid(&sshdr);
1da177e4
LT		 2110 retries++;
2111 } while (retries < 3 &&
2112 (!scsi_status_is_good(the_result) ||
c65be1a6 2113 ((driver_byte(the_result) == DRIVER_SENSE) &&
1da177e4
LT		 2114 sense_valid && sshdr.sense_key == UNIT_ATTENTION)));
2115
c65be1a6 2116 if (driver_byte(the_result) != DRIVER_SENSE) {
1da177e4
LT		 2117 /* no sense, TUR either succeeded or failed
2118 * with a status error */
e73aec82 2119 if(!spintime && !scsi_status_is_good(the_result)) {
ef61329d
HR		 2120 sd_print_result(sdkp, "Test Unit Ready failed",
2121 the_result);
e73aec82 2122 }
1da177e4
LT		 2123 break;
2124 }
ef61329d 2125
1da177e4
LT		 2126 /*
2127 * The device does not want the automatic start to be issued.
2128 */
33dd6f92 2129 if (sdkp->device->no_start_on_add)
1da177e4 2130 break;
1da177e4 2131
33dd6f92
MW		 2132 if (sense_valid && sshdr.sense_key == NOT_READY) {
2133 if (sshdr.asc == 4 && sshdr.ascq == 3)
2134 break; /* manual intervention required */
2135 if (sshdr.asc == 4 && sshdr.ascq == 0xb)
2136 break; /* standby */
2137 if (sshdr.asc == 4 && sshdr.ascq == 0xc)
2138 break; /* unavailable */
505aa4b6
MR		 2139 if (sshdr.asc == 4 && sshdr.ascq == 0x1b)
2140 break; /* sanitize in progress */
33dd6f92
MW		 2141 /*
2142 * Issue command to spin up drive when not ready
2143 */
1da177e4 2144 if (!spintime) {
e73aec82 2145 sd_printk(KERN_NOTICE, sdkp, "Spinning up disk...");
1da177e4
LT		 2146 cmd[0] = START_STOP;
2147 cmd[1] = 1; /* Return immediately */
2148 memset((void *) &cmd[2], 0, 8);
2149 cmd[4] = 1; /* Start spin cycle */
d2886ea3
SR		 2150 if (sdkp->device->start_stop_pwr_cond)
2151 cmd[4] |= 1 << 4;
ea73a9f2
JB		 2152 scsi_execute_req(sdkp->device, cmd, DMA_NONE,
2153 NULL, 0, &sshdr,
f4f4e47e
FT		 2154 SD_TIMEOUT, SD_MAX_RETRIES,
2155 NULL);
4451e472
AS		 2156 spintime_expire = jiffies + 100 * HZ;
2157 spintime = 1;
1da177e4 2158 }
1da177e4
LT		 2159 /* Wait 1 second for next try */
2160 msleep(1000);
3a1d0783 2161 printk(KERN_CONT ".");
4451e472
AS		 2162
2163 /*
2164 * Wait for USB flash devices with slow firmware.
2165 * Yes, this sense key/ASC combination shouldn't
2166 * occur here. It's characteristic of these devices.
2167 */
2168 } else if (sense_valid &&
2169 sshdr.sense_key == UNIT_ATTENTION &&
2170 sshdr.asc == 0x28) {
2171 if (!spintime) {
2172 spintime_expire = jiffies + 5 * HZ;
2173 spintime = 1;
2174 }
2175 /* Wait 1 second for next try */
2176 msleep(1000);
1da177e4
LT		 2177 } else {
2178 /* we don't understand the sense code, so it's
2179 * probably pointless to loop */
2180 if(!spintime) {
e73aec82
MP		 2181 sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n");
2182 sd_print_sense_hdr(sdkp, &sshdr);
1da177e4
LT		 2183 }
2184 break;
2185 }
2186
4451e472 2187 } while (spintime && time_before_eq(jiffies, spintime_expire));
1da177e4
LT		 2188
2189 if (spintime) {
2190 if (scsi_status_is_good(the_result))
3a1d0783 2191 printk(KERN_CONT "ready\n");
1da177e4 2192 else
3a1d0783 2193 printk(KERN_CONT "not responding...\n");
1da177e4
LT		 2194 }
2195}
2196
e0597d70
MP		 2197/*
2198 * Determine whether disk supports Data Integrity Field.
2199 */
fe542396 2200static int sd_read_protection_type(struct scsi_disk *sdkp, unsigned char *buffer)
e0597d70
MP		 2201{
2202 struct scsi_device *sdp = sdkp->device;
2203 u8 type;
fe542396 2204 int ret = 0;
e0597d70
MP		 2205
2206 if (scsi_device_protection(sdp) == 0 || (buffer[12] & 1) == 0)
fe542396 2207 return ret;
35e1a5d9
MP		 2208
2209 type = ((buffer[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */
2210
8475c811 2211 if (type > T10_PI_TYPE3_PROTECTION)
fe542396
MP		 2212 ret = -ENODEV;
2213 else if (scsi_host_dif_capable(sdp->host, type))
2214 ret = 1;
2215
2216 if (sdkp->first_scan || type != sdkp->protection_type)
2217 switch (ret) {
2218 case -ENODEV:
2219 sd_printk(KERN_ERR, sdkp, "formatted with unsupported" \
2220 " protection type %u. Disabling disk!\n",
2221 type);
2222 break;
2223 case 1:
2224 sd_printk(KERN_NOTICE, sdkp,
2225 "Enabling DIF Type %u protection\n", type);
2226 break;
2227 case 0:
2228 sd_printk(KERN_NOTICE, sdkp,
2229 "Disabling DIF Type %u protection\n", type);
2230 break;
2231 }
e0597d70 2232
be922f47
MP		 2233 sdkp->protection_type = type;
2234
fe542396 2235 return ret;
e0597d70
MP		 2236}
2237
0da205e0
MW		 2238static void read_capacity_error(struct scsi_disk *sdkp, struct scsi_device *sdp,
2239 struct scsi_sense_hdr *sshdr, int sense_valid,
2240 int the_result)
2241{
c65be1a6 2242 if (driver_byte(the_result) == DRIVER_SENSE)
0da205e0
MW		 2243 sd_print_sense_hdr(sdkp, sshdr);
2244 else
2245 sd_printk(KERN_NOTICE, sdkp, "Sense not available.\n");
2246
2247 /*
2248 * Set dirty bit for removable devices if not ready -
2249 * sometimes drives will not report this properly.
2250 */
2251 if (sdp->removable &&
2252 sense_valid && sshdr->sense_key == NOT_READY)
2bae0093 2253 set_media_not_present(sdkp);
0da205e0
MW		 2254
2255 /*
2256 * We used to set media_present to 0 here to indicate no media
2257 * in the drive, but some drives fail read capacity even with
2258 * media present, so we can't do that.
2259 */
2260 sdkp->capacity = 0; /* unknown mapped to zero - as usual */
2261}
2262
2263#define RC16_LEN 32
2264#if RC16_LEN > SD_BUF_SIZE
2265#error RC16_LEN must not be more than SD_BUF_SIZE
2266#endif
2267
3233ac19
JB		 2268#define READ_CAPACITY_RETRIES_ON_RESET 10
2269
0da205e0
MW		 2270static int read_capacity_16(struct scsi_disk *sdkp, struct scsi_device *sdp,
2271 unsigned char *buffer)
ea73a9f2 2272{
1da177e4 2273 unsigned char cmd[16];
1da177e4
LT		 2274 struct scsi_sense_hdr sshdr;
2275 int sense_valid = 0;
0da205e0 2276 int the_result;
3233ac19 2277 int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET;
ea09bcc9 2278 unsigned int alignment;
0da205e0
MW		 2279 unsigned long long lba;
2280 unsigned sector_size;
1da177e4 2281
5ce524bd
HG		 2282 if (sdp->no_read_capacity_16)
2283 return -EINVAL;
2284
1da177e4 2285 do {
0da205e0 2286 memset(cmd, 0, 16);
eb846d9f 2287 cmd[0] = SERVICE_ACTION_IN_16;
0da205e0
MW		 2288 cmd[1] = SAI_READ_CAPACITY_16;
2289 cmd[13] = RC16_LEN;
2290 memset(buffer, 0, RC16_LEN);
2291
ea73a9f2 2292 the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE,
0da205e0
MW		 2293 buffer, RC16_LEN, &sshdr,
2294 SD_TIMEOUT, SD_MAX_RETRIES, NULL);
1da177e4 2295
ea73a9f2 2296 if (media_not_present(sdkp, &sshdr))
0da205e0 2297 return -ENODEV;
1da177e4 2298
2b301307 2299 if (the_result) {
ea73a9f2 2300 sense_valid = scsi_sense_valid(&sshdr);
2b301307
MW		 2301 if (sense_valid &&
2302 sshdr.sense_key == ILLEGAL_REQUEST &&
2303 (sshdr.asc == 0x20 || sshdr.asc == 0x24) &&
2304 sshdr.ascq == 0x00)
2305 /* Invalid Command Operation Code or
2306 * Invalid Field in CDB, just retry
2307 * silently with RC10 */
2308 return -EINVAL;
3233ac19
JB		 2309 if (sense_valid &&
2310 sshdr.sense_key == UNIT_ATTENTION &&
2311 sshdr.asc == 0x29 && sshdr.ascq == 0x00)
2312 /* Device reset might occur several times,
2313 * give it one more chance */
2314 if (--reset_retries > 0)
2315 continue;
2b301307 2316 }
1da177e4
LT		 2317 retries--;
2318
2319 } while (the_result && retries);
2320
0da205e0 2321 if (the_result) {
ef61329d 2322 sd_print_result(sdkp, "Read Capacity(16) failed", the_result);
0da205e0
MW		 2323 read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result);
2324 return -EINVAL;
2325 }
e73aec82 2326
8f76d151
DH		 2327 sector_size = get_unaligned_be32(&buffer[8]);
2328 lba = get_unaligned_be64(&buffer[0]);
0da205e0 2329
fe542396
MP		 2330 if (sd_read_protection_type(sdkp, buffer) < 0) {
2331 sdkp->capacity = 0;
2332 return -ENODEV;
2333 }
0da205e0 2334
ea09bcc9 2335 /* Logical blocks per physical block exponent */
526f7c79 2336 sdkp->physical_block_size = (1 << (buffer[13] & 0xf)) * sector_size;
ea09bcc9 2337
89d94756
HR		 2338 /* RC basis */
2339 sdkp->rc_basis = (buffer[12] >> 4) & 0x3;
2340
ea09bcc9
MP		 2341 /* Lowest aligned logical block */
2342 alignment = ((buffer[14] & 0x3f) << 8 | buffer[15]) * sector_size;
2343 blk_queue_alignment_offset(sdp->request_queue, alignment);
2344 if (alignment && sdkp->first_scan)
2345 sd_printk(KERN_NOTICE, sdkp,
2346 "physical block alignment offset: %u\n", alignment);
2347
c98a0eb0
MP		 2348 if (buffer[14] & 0x80) { /* LBPME */
2349 sdkp->lbpme = 1;
e339c1a7 2350
c98a0eb0
MP		 2351 if (buffer[14] & 0x40) /* LBPRZ */
2352 sdkp->lbprz = 1;
e339c1a7 2353
c98a0eb0 2354 sd_config_discard(sdkp, SD_LBP_WS16);
e339c1a7
MP		 2355 }
2356
0da205e0
MW		 2357 sdkp->capacity = lba + 1;
2358 return sector_size;
2359}
2360
2361static int read_capacity_10(struct scsi_disk *sdkp, struct scsi_device *sdp,
2362 unsigned char *buffer)
2363{
2364 unsigned char cmd[16];
2365 struct scsi_sense_hdr sshdr;
2366 int sense_valid = 0;
2367 int the_result;
3233ac19 2368 int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET;
0da205e0
MW		 2369 sector_t lba;
2370 unsigned sector_size;
2371
2372 do {
2373 cmd[0] = READ_CAPACITY;
2374 memset(&cmd[1], 0, 9);
2375 memset(buffer, 0, 8);
2376
2377 the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE,
2378 buffer, 8, &sshdr,
2379 SD_TIMEOUT, SD_MAX_RETRIES, NULL);
2380
2381 if (media_not_present(sdkp, &sshdr))
2382 return -ENODEV;
2383
3233ac19 2384 if (the_result) {
0da205e0 2385 sense_valid = scsi_sense_valid(&sshdr);
3233ac19
JB		 2386 if (sense_valid &&
2387 sshdr.sense_key == UNIT_ATTENTION &&
2388 sshdr.asc == 0x29 && sshdr.ascq == 0x00)
2389 /* Device reset might occur several times,
2390 * give it one more chance */
2391 if (--reset_retries > 0)
2392 continue;
2393 }
0da205e0
MW		 2394 retries--;
2395
2396 } while (the_result && retries);
2397
2398 if (the_result) {
ef61329d 2399 sd_print_result(sdkp, "Read Capacity(10) failed", the_result);
0da205e0
MW		 2400 read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result);
2401 return -EINVAL;
2402 }
2403
8f76d151
DH		 2404 sector_size = get_unaligned_be32(&buffer[4]);
2405 lba = get_unaligned_be32(&buffer[0]);
0da205e0 2406
5ce524bd
HG		 2407 if (sdp->no_read_capacity_16 && (lba == 0xffffffff)) {
2408 /* Some buggy (usb cardreader) devices return an lba of
2409 0xffffffff when the want to report a size of 0 (with
2410 which they really mean no media is present) */
2411 sdkp->capacity = 0;
5cc10350 2412 sdkp->physical_block_size = sector_size;
5ce524bd
HG		 2413 return sector_size;
2414 }
2415
0da205e0 2416 sdkp->capacity = lba + 1;
526f7c79 2417 sdkp->physical_block_size = sector_size;
0da205e0
MW		 2418 return sector_size;
2419}
2420
2b301307
MW		 2421static int sd_try_rc16_first(struct scsi_device *sdp)
2422{
f87146bb
HR		 2423 if (sdp->host->max_cmd_len < 16)
2424 return 0;
6a0bdffa
AS		 2425 if (sdp->try_rc_10_first)
2426 return 0;
2b301307
MW		 2427 if (sdp->scsi_level > SCSI_SPC_2)
2428 return 1;
2429 if (scsi_device_protection(sdp))
2430 return 1;
2431 return 0;
2432}
2433
0da205e0
MW		 2434/*
2435 * read disk capacity
2436 */
2437static void
2438sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer)
2439{
2440 int sector_size;
2441 struct scsi_device *sdp = sdkp->device;
2442
2b301307 2443 if (sd_try_rc16_first(sdp)) {
0da205e0
MW		 2444 sector_size = read_capacity_16(sdkp, sdp, buffer);
2445 if (sector_size == -EOVERFLOW)
1da177e4 2446 goto got_data;
2b301307
MW		 2447 if (sector_size == -ENODEV)
2448 return;
2449 if (sector_size < 0)
2450 sector_size = read_capacity_10(sdkp, sdp, buffer);
0da205e0
MW		 2451 if (sector_size < 0)
2452 return;
1da177e4 2453 } else {
0da205e0
MW		 2454 sector_size = read_capacity_10(sdkp, sdp, buffer);
2455 if (sector_size == -EOVERFLOW)
2456 goto got_data;
2457 if (sector_size < 0)
2458 return;
2459 if ((sizeof(sdkp->capacity) > 4) &&
2460 (sdkp->capacity > 0xffffffffULL)) {
2461 int old_sector_size = sector_size;
2462 sd_printk(KERN_NOTICE, sdkp, "Very big device. "
2463 "Trying to use READ CAPACITY(16).\n");
2464 sector_size = read_capacity_16(sdkp, sdp, buffer);
2465 if (sector_size < 0) {
2466 sd_printk(KERN_NOTICE, sdkp,
2467 "Using 0xffffffff as device size\n");
2468 sdkp->capacity = 1 + (sector_t) 0xffffffff;
2469 sector_size = old_sector_size;
2470 goto got_data;
2471 }
597d7400
MP		 2472 /* Remember that READ CAPACITY(16) succeeded */
2473 sdp->try_rc_10_first = 0;
0da205e0
MW		 2474 }
2475 }
1da177e4 2476
5c211caa
AS		 2477 /* Some devices are known to return the total number of blocks,
2478 * not the highest block number. Some devices have versions
2479 * which do this and others which do not. Some devices we might
2480 * suspect of doing this but we don't know for certain.
2481 *
2482 * If we know the reported capacity is wrong, decrement it. If
2483 * we can only guess, then assume the number of blocks is even
2484 * (usually true but not always) and err on the side of lowering
2485 * the capacity.
2486 */
2487 if (sdp->fix_capacity ||
2488 (sdp->guess_capacity && (sdkp->capacity & 0x01))) {
2489 sd_printk(KERN_INFO, sdkp, "Adjusting the sector count "
2490 "from its reported value: %llu\n",
2491 (unsigned long long) sdkp->capacity);
1da177e4 2492 --sdkp->capacity;
61bf54b7
ON		 2493 }
2494
1da177e4
LT		 2495got_data:
2496 if (sector_size == 0) {
2497 sector_size = 512;
e73aec82
MP		 2498 sd_printk(KERN_NOTICE, sdkp, "Sector size 0 reported, "
2499 "assuming 512.\n");
1da177e4
LT		 2500 }
2501
2502 if (sector_size != 512 &&
2503 sector_size != 1024 &&
2504 sector_size != 2048 &&
74856fbf 2505 sector_size != 4096) {
e73aec82
MP		 2506 sd_printk(KERN_NOTICE, sdkp, "Unsupported sector size %d.\n",
2507 sector_size);
1da177e4
LT		 2508 /*
2509 * The user might want to re-format the drive with
2510 * a supported sectorsize. Once this happens, it
2511 * would be relatively trivial to set the thing up.
2512 * For this reason, we leave the thing in the table.
2513 */
2514 sdkp->capacity = 0;
2515 /*
2516 * set a bogus sector size so the normal read/write
2517 * logic in the block layer will eventually refuse any
2518 * request on this device without tripping over power
2519 * of two sector size assumptions
2520 */
2521 sector_size = 512;
2522 }
e1defc4f 2523 blk_queue_logical_block_size(sdp->request_queue, sector_size);
89d94756
HR		 2524 blk_queue_physical_block_size(sdp->request_queue,
2525 sdkp->physical_block_size);
2526 sdkp->device->sector_size = sector_size;
7404ad3b 2527
89d94756
HR		 2528 if (sdkp->capacity > 0xffffffff)
2529 sdp->use_16_for_rw = 1;
1da177e4 2530
89d94756 2531}
1da177e4 2532
89d94756
HR		 2533/*
2534 * Print disk capacity
2535 */
2536static void
2537sd_print_capacity(struct scsi_disk *sdkp,
2538 sector_t old_capacity)
2539{
2540 int sector_size = sdkp->device->sector_size;
2541 char cap_str_2[10], cap_str_10[10];
ea09bcc9 2542
d7e6db20
DLM		 2543 if (!sdkp->first_scan && old_capacity == sdkp->capacity)
2544 return;
2545
89d94756
HR		 2546 string_get_size(sdkp->capacity, sector_size,
2547 STRING_UNITS_2, cap_str_2, sizeof(cap_str_2));
2548 string_get_size(sdkp->capacity, sector_size,
d7e6db20 2549 STRING_UNITS_10, cap_str_10, sizeof(cap_str_10));
1da177e4 2550
d7e6db20
DLM		 2551 sd_printk(KERN_NOTICE, sdkp,
2552 "%llu %d-byte logical blocks: (%s/%s)\n",
2553 (unsigned long long)sdkp->capacity,
2554 sector_size, cap_str_10, cap_str_2);
53ad570b 2555
d7e6db20
DLM		 2556 if (sdkp->physical_block_size != sector_size)
2557 sd_printk(KERN_NOTICE, sdkp,
2558 "%u-byte physical blocks\n",
2559 sdkp->physical_block_size);
89d94756 2560
d7e6db20 2561 sd_zbc_print_zones(sdkp);
1da177e4
LT		 2562}
2563
2564/* called with buffer of length 512 */
2565static inline int
ea73a9f2
JB		 2566sd_do_mode_sense(struct scsi_device *sdp, int dbd, int modepage,
2567 unsigned char *buffer, int len, struct scsi_mode_data *data,
2568 struct scsi_sense_hdr *sshdr)
1da177e4 2569{
ea73a9f2 2570 return scsi_mode_sense(sdp, dbd, modepage, buffer, len,
1cf72699 2571 SD_TIMEOUT, SD_MAX_RETRIES, data,
ea73a9f2 2572 sshdr);
1da177e4
LT		 2573}
2574
2575/*
2576 * read write protect setting, if possible - called only in sd_revalidate_disk()
48970800 2577 * called with buffer of length SD_BUF_SIZE
1da177e4
LT		 2578 */
2579static void
e73aec82 2580sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer)
ea73a9f2 2581{
1da177e4 2582 int res;
ea73a9f2 2583 struct scsi_device *sdp = sdkp->device;
1da177e4 2584 struct scsi_mode_data data;
70a9b873 2585 int old_wp = sdkp->write_prot;
1da177e4
LT		 2586
2587 set_disk_ro(sdkp->disk, 0);
ea73a9f2 2588 if (sdp->skip_ms_page_3f) {
b2bff6ce 2589 sd_first_printk(KERN_NOTICE, sdkp, "Assuming Write Enabled\n");
1da177e4
LT		 2590 return;
2591 }
2592
ea73a9f2
JB		 2593 if (sdp->use_192_bytes_for_3f) {
2594 res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 192, &data, NULL);
1da177e4
LT		 2595 } else {
2596 /*
2597 * First attempt: ask for all pages (0x3F), but only 4 bytes.
2598 * We have to start carefully: some devices hang if we ask
2599 * for more than is available.
2600 */
ea73a9f2 2601 res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 4, &data, NULL);
1da177e4
LT		 2602
2603 /*
2604 * Second attempt: ask for page 0 When only page 0 is
2605 * implemented, a request for page 3F may return Sense Key
2606 * 5: Illegal Request, Sense Code 24: Invalid field in
2607 * CDB.
2608 */
2609 if (!scsi_status_is_good(res))
ea73a9f2 2610 res = sd_do_mode_sense(sdp, 0, 0, buffer, 4, &data, NULL);
1da177e4
LT		 2611
2612 /*
2613 * Third attempt: ask 255 bytes, as we did earlier.
2614 */
2615 if (!scsi_status_is_good(res))
ea73a9f2
JB		 2616 res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 255,
2617 &data, NULL);
1da177e4
LT		 2618 }
2619
2620 if (!scsi_status_is_good(res)) {
b2bff6ce 2621 sd_first_printk(KERN_WARNING, sdkp,
e73aec82 2622 "Test WP failed, assume Write Enabled\n");
1da177e4
LT		 2623 } else {
2624 sdkp->write_prot = ((data.device_specific & 0x80) != 0);
8acf608e 2625 set_disk_ro(sdkp->disk, sdkp->write_prot);
70a9b873
MP		 2626 if (sdkp->first_scan || old_wp != sdkp->write_prot) {
2627 sd_printk(KERN_NOTICE, sdkp, "Write Protect is %s\n",
2628 sdkp->write_prot ? "on" : "off");
df441cc0 2629 sd_printk(KERN_DEBUG, sdkp, "Mode Sense: %4ph\n", buffer);
70a9b873 2630 }
1da177e4
LT		 2631 }
2632}
2633
2634/*
2635 * sd_read_cache_type - called only from sd_revalidate_disk()
48970800 2636 * called with buffer of length SD_BUF_SIZE
1da177e4
LT		 2637 */
2638static void
e73aec82 2639sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer)
631e8a13 2640{
1da177e4 2641 int len = 0, res;
ea73a9f2 2642 struct scsi_device *sdp = sdkp->device;
1da177e4 2643
631e8a13
AV		 2644 int dbd;
2645 int modepage;
0bcaa111 2646 int first_len;
1da177e4
LT		 2647 struct scsi_mode_data data;
2648 struct scsi_sense_hdr sshdr;
70a9b873
MP		 2649 int old_wce = sdkp->WCE;
2650 int old_rcd = sdkp->RCD;
2651 int old_dpofua = sdkp->DPOFUA;
1da177e4 2652
39c60a09
JB		 2653
2654 if (sdkp->cache_override)
2655 return;
2656
0bcaa111
LT		 2657 first_len = 4;
2658 if (sdp->skip_ms_page_8) {
2659 if (sdp->type == TYPE_RBC)
2660 goto defaults;
2661 else {
2662 if (sdp->skip_ms_page_3f)
2663 goto defaults;
2664 modepage = 0x3F;
2665 if (sdp->use_192_bytes_for_3f)
2666 first_len = 192;
2667 dbd = 0;
2668 }
2669 } else if (sdp->type == TYPE_RBC) {
631e8a13
AV		 2670 modepage = 6;
2671 dbd = 8;
2672 } else {
2673 modepage = 8;
2674 dbd = 0;
2675 }
2676
1da177e4 2677 /* cautiously ask */
0bcaa111
LT		 2678 res = sd_do_mode_sense(sdp, dbd, modepage, buffer, first_len,
2679 &data, &sshdr);
1da177e4
LT		 2680
2681 if (!scsi_status_is_good(res))
2682 goto bad_sense;
2683
6d73c851
AV		 2684 if (!data.header_length) {
2685 modepage = 6;
0bcaa111 2686 first_len = 0;
b2bff6ce
MP		 2687 sd_first_printk(KERN_ERR, sdkp,
2688 "Missing header in MODE_SENSE response\n");
6d73c851
AV		 2689 }
2690
1da177e4
LT		 2691 /* that went OK, now ask for the proper length */
2692 len = data.length;
2693
2694 /*
2695 * We're only interested in the first three bytes, actually.
2696 * But the data cache page is defined for the first 20.
2697 */
2698 if (len < 3)
2699 goto bad_sense;
0bcaa111 2700 else if (len > SD_BUF_SIZE) {
b2bff6ce 2701 sd_first_printk(KERN_NOTICE, sdkp, "Truncating mode parameter "
0bcaa111
LT		 2702 "data from %d to %d bytes\n", len, SD_BUF_SIZE);
2703 len = SD_BUF_SIZE;
2704 }
2705 if (modepage == 0x3F && sdp->use_192_bytes_for_3f)
2706 len = 192;
1da177e4
LT		 2707
2708 /* Get the data */
0bcaa111
LT		 2709 if (len > first_len)
2710 res = sd_do_mode_sense(sdp, dbd, modepage, buffer, len,
2711 &data, &sshdr);
1da177e4
LT		 2712
2713 if (scsi_status_is_good(res)) {
631e8a13 2714 int offset = data.header_length + data.block_descriptor_length;
1da177e4 2715
0bcaa111
LT		 2716 while (offset < len) {
2717 u8 page_code = buffer[offset] & 0x3F;
2718 u8 spf = buffer[offset] & 0x40;
2719
2720 if (page_code == 8 || page_code == 6) {
2721 /* We're interested only in the first 3 bytes.
2722 */
2723 if (len - offset <= 2) {
b2bff6ce
MP		 2724 sd_first_printk(KERN_ERR, sdkp,
2725 "Incomplete mode parameter "
2726 "data\n");
0bcaa111
LT		 2727 goto defaults;
2728 } else {
2729 modepage = page_code;
2730 goto Page_found;
2731 }
2732 } else {
2733 /* Go to the next page */
2734 if (spf && len - offset > 3)
2735 offset += 4 + (buffer[offset+2] << 8) +
2736 buffer[offset+3];
2737 else if (!spf && len - offset > 1)
2738 offset += 2 + buffer[offset+1];
2739 else {
b2bff6ce
MP		 2740 sd_first_printk(KERN_ERR, sdkp,
2741 "Incomplete mode "
2742 "parameter data\n");
0bcaa111
LT		 2743 goto defaults;
2744 }
2745 }
48970800
AV		 2746 }
2747
b2bff6ce 2748 sd_first_printk(KERN_ERR, sdkp, "No Caching mode page found\n");
984f1733
AS		 2749 goto defaults;
2750
0bcaa111 2751 Page_found:
631e8a13
AV		 2752 if (modepage == 8) {
2753 sdkp->WCE = ((buffer[offset + 2] & 0x04) != 0);
2754 sdkp->RCD = ((buffer[offset + 2] & 0x01) != 0);
2755 } else {
2756 sdkp->WCE = ((buffer[offset + 2] & 0x01) == 0);
2757 sdkp->RCD = 0;
2758 }
1da177e4 2759
007365ad 2760 sdkp->DPOFUA = (data.device_specific & 0x10) != 0;
b14bf2d0
AS		 2761 if (sdp->broken_fua) {
2762 sd_first_printk(KERN_NOTICE, sdkp, "Disabling FUA\n");
2763 sdkp->DPOFUA = 0;
26f28197
DLM		 2764 } else if (sdkp->DPOFUA && !sdkp->device->use_10_for_rw &&
2765 !sdkp->device->use_16_for_rw) {
b2bff6ce 2766 sd_first_printk(KERN_NOTICE, sdkp,
e73aec82 2767 "Uses READ/WRITE(6), disabling FUA\n");
007365ad
TH		 2768 sdkp->DPOFUA = 0;
2769 }
2770
2eefd57b
SRT		 2771 /* No cache flush allowed for write protected devices */
2772 if (sdkp->WCE && sdkp->write_prot)
2773 sdkp->WCE = 0;
2774
70a9b873
MP		 2775 if (sdkp->first_scan || old_wce != sdkp->WCE ||
2776 old_rcd != sdkp->RCD || old_dpofua != sdkp->DPOFUA)
2777 sd_printk(KERN_NOTICE, sdkp,
2778 "Write cache: %s, read cache: %s, %s\n",
2779 sdkp->WCE ? "enabled" : "disabled",
2780 sdkp->RCD ? "disabled" : "enabled",
2781 sdkp->DPOFUA ? "supports DPO and FUA"
2782 : "doesn't support DPO or FUA");
1da177e4
LT		 2783
2784 return;
2785 }
2786
2787bad_sense:
ea73a9f2 2788 if (scsi_sense_valid(&sshdr) &&
1da177e4
LT		 2789 sshdr.sense_key == ILLEGAL_REQUEST &&
2790 sshdr.asc == 0x24 && sshdr.ascq == 0x0)
e73aec82 2791 /* Invalid field in CDB */
b2bff6ce 2792 sd_first_printk(KERN_NOTICE, sdkp, "Cache data unavailable\n");
1da177e4 2793 else
b2bff6ce
MP		 2794 sd_first_printk(KERN_ERR, sdkp,
2795 "Asking for cache data failed\n");
1da177e4
LT		 2796
2797defaults:
b81478d8 2798 if (sdp->wce_default_on) {
b2bff6ce
MP		 2799 sd_first_printk(KERN_NOTICE, sdkp,
2800 "Assuming drive cache: write back\n");
b81478d8
NJ		 2801 sdkp->WCE = 1;
2802 } else {
b2bff6ce
MP		 2803 sd_first_printk(KERN_ERR, sdkp,
2804 "Assuming drive cache: write through\n");
b81478d8
NJ		 2805 sdkp->WCE = 0;
2806 }
1da177e4 2807 sdkp->RCD = 0;
48970800 2808 sdkp->DPOFUA = 0;
1da177e4
LT		 2809}
2810
e0597d70
MP		 2811/*
2812 * The ATO bit indicates whether the DIF application tag is available
2813 * for use by the operating system.
2814 */
439d77f7 2815static void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer)
e0597d70
MP		 2816{
2817 int res, offset;
2818 struct scsi_device *sdp = sdkp->device;
2819 struct scsi_mode_data data;
2820 struct scsi_sense_hdr sshdr;
2821
89d94756 2822 if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC)
e0597d70
MP		 2823 return;
2824
2825 if (sdkp->protection_type == 0)
2826 return;
2827
2828 res = scsi_mode_sense(sdp, 1, 0x0a, buffer, 36, SD_TIMEOUT,
2829 SD_MAX_RETRIES, &data, &sshdr);
2830
2831 if (!scsi_status_is_good(res) || !data.header_length ||
2832 data.length < 6) {
b2bff6ce 2833 sd_first_printk(KERN_WARNING, sdkp,
e0597d70
MP		 2834 "getting Control mode page failed, assume no ATO\n");
2835
2836 if (scsi_sense_valid(&sshdr))
2837 sd_print_sense_hdr(sdkp, &sshdr);
2838
2839 return;
2840 }
2841
2842 offset = data.header_length + data.block_descriptor_length;
2843
2844 if ((buffer[offset] & 0x3f) != 0x0a) {
b2bff6ce 2845 sd_first_printk(KERN_ERR, sdkp, "ATO Got wrong page\n");
e0597d70
MP		 2846 return;
2847 }
2848
2849 if ((buffer[offset + 5] & 0x80) == 0)
2850 return;
2851
2852 sdkp->ATO = 1;
2853
2854 return;
2855}
2856
d11b6916
MP		 2857/**
2858 * sd_read_block_limits - Query disk device for preferred I/O sizes.
7529fbb0 2859 * @sdkp: disk to query
d11b6916
MP		 2860 */
2861static void sd_read_block_limits(struct scsi_disk *sdkp)
2862{
2863 unsigned int sector_sz = sdkp->device->sector_size;
bb2d3de1 2864 const int vpd_len = 64;
e3deec09 2865 unsigned char *buffer = kmalloc(vpd_len, GFP_KERNEL);
d11b6916 2866
e3deec09
JB		 2867 if (!buffer ||
2868 /* Block Limits VPD */
2869 scsi_get_vpd_page(sdkp->device, 0xb0, buffer, vpd_len))
2870 goto out;
d11b6916
MP		 2871
2872 blk_queue_io_min(sdkp->disk->queue,
2873 get_unaligned_be16(&buffer[6]) * sector_sz);
ca369d51
MP		 2874
2875 sdkp->max_xfer_blocks = get_unaligned_be32(&buffer[8]);
2876 sdkp->opt_xfer_blocks = get_unaligned_be32(&buffer[12]);
d11b6916 2877
c98a0eb0
MP		 2878 if (buffer[3] == 0x3c) {
2879 unsigned int lba_count, desc_count;
e339c1a7 2880
5db44863 2881 sdkp->max_ws_blocks = (u32)get_unaligned_be64(&buffer[36]);
e339c1a7 2882
c98a0eb0 2883 if (!sdkp->lbpme)
045d3fe7 2884 goto out;
045d3fe7 2885
c98a0eb0
MP		 2886 lba_count = get_unaligned_be32(&buffer[20]);
2887 desc_count = get_unaligned_be32(&buffer[24]);
045d3fe7 2888
c98a0eb0
MP		 2889 if (lba_count && desc_count)
2890 sdkp->max_unmap_blocks = lba_count;
e339c1a7 2891
c98a0eb0 2892 sdkp->unmap_granularity = get_unaligned_be32(&buffer[28]);
e339c1a7
MP		 2893
2894 if (buffer[32] & 0x80)
c98a0eb0 2895 sdkp->unmap_alignment =
e339c1a7 2896 get_unaligned_be32(&buffer[32]) & ~(1 << 31);
c98a0eb0
MP		 2897
2898 if (!sdkp->lbpvpd) { /* LBP VPD page not provided */
2899
2900 if (sdkp->max_unmap_blocks)
2901 sd_config_discard(sdkp, SD_LBP_UNMAP);
2902 else
2903 sd_config_discard(sdkp, SD_LBP_WS16);
2904
2905 } else { /* LBP VPD page tells us what to use */
bcd069bb 2906 if (sdkp->lbpu && sdkp->max_unmap_blocks)
e461338b
MP		 2907 sd_config_discard(sdkp, SD_LBP_UNMAP);
2908 else if (sdkp->lbpws)
c98a0eb0
MP		 2909 sd_config_discard(sdkp, SD_LBP_WS16);
2910 else if (sdkp->lbpws10)
2911 sd_config_discard(sdkp, SD_LBP_WS10);
2912 else
2913 sd_config_discard(sdkp, SD_LBP_DISABLE);
2914 }
e339c1a7
MP		 2915 }
2916
e3deec09 2917 out:
d11b6916
MP		 2918 kfree(buffer);
2919}
2920
3821d768
MP		 2921/**
2922 * sd_read_block_characteristics - Query block dev. characteristics
7529fbb0 2923 * @sdkp: disk to query
3821d768
MP		 2924 */
2925static void sd_read_block_characteristics(struct scsi_disk *sdkp)
2926{
89d94756 2927 struct request_queue *q = sdkp->disk->queue;
e3deec09 2928 unsigned char *buffer;
3821d768 2929 u16 rot;
bb2d3de1 2930 const int vpd_len = 64;
3821d768 2931
e3deec09 2932 buffer = kmalloc(vpd_len, GFP_KERNEL);
3821d768 2933
e3deec09
JB		 2934 if (!buffer ||
2935 /* Block Device Characteristics VPD */
2936 scsi_get_vpd_page(sdkp->device, 0xb1, buffer, vpd_len))
2937 goto out;
3821d768
MP		 2938
2939 rot = get_unaligned_be16(&buffer[4]);
2940
b277da0a 2941 if (rot == 1) {
8b904b5b
BVA		 2942 blk_queue_flag_set(QUEUE_FLAG_NONROT, q);
2943 blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, q);
b277da0a 2944 }
3821d768 2945
68af412c
DLM		 2946 if (sdkp->device->type == TYPE_ZBC) {
2947 /* Host-managed */
89d94756 2948 q->limits.zoned = BLK_ZONED_HM;
68af412c
DLM		 2949 } else {
2950 sdkp->zoned = (buffer[8] >> 4) & 3;
2951 if (sdkp->zoned == 1)
2952 /* Host-aware */
2953 q->limits.zoned = BLK_ZONED_HA;
2954 else
2955 /*
2956 * Treat drive-managed devices as
2957 * regular block devices.
2958 */
2959 q->limits.zoned = BLK_ZONED_NONE;
2960 }
89d94756
HR		 2961 if (blk_queue_is_zoned(q) && sdkp->first_scan)
2962 sd_printk(KERN_NOTICE, sdkp, "Host-%s zoned block device\n",
2963 q->limits.zoned == BLK_ZONED_HM ? "managed" : "aware");
2964
e3deec09 2965 out:
3821d768
MP		 2966 kfree(buffer);
2967}
2968
045d3fe7 2969/**
c98a0eb0 2970 * sd_read_block_provisioning - Query provisioning VPD page
7529fbb0 2971 * @sdkp: disk to query
045d3fe7 2972 */
c98a0eb0 2973static void sd_read_block_provisioning(struct scsi_disk *sdkp)
045d3fe7
MP		 2974{
2975 unsigned char *buffer;
2976 const int vpd_len = 8;
2977
c98a0eb0 2978 if (sdkp->lbpme == 0)
045d3fe7
MP		 2979 return;
2980
2981 buffer = kmalloc(vpd_len, GFP_KERNEL);
2982
2983 if (!buffer || scsi_get_vpd_page(sdkp->device, 0xb2, buffer, vpd_len))
2984 goto out;
2985
c98a0eb0
MP		 2986 sdkp->lbpvpd = 1;
2987 sdkp->lbpu = (buffer[5] >> 7) & 1; /* UNMAP */
2988 sdkp->lbpws = (buffer[5] >> 6) & 1; /* WRITE SAME(16) with UNMAP */
2989 sdkp->lbpws10 = (buffer[5] >> 5) & 1; /* WRITE SAME(10) with UNMAP */
045d3fe7
MP		 2990
2991 out:
2992 kfree(buffer);
2993}
2994
5db44863
MP		 2995static void sd_read_write_same(struct scsi_disk *sdkp, unsigned char *buffer)
2996{
66c28f97
MP		 2997 struct scsi_device *sdev = sdkp->device;
2998
54b2b50c
MP		 2999 if (sdev->host->no_write_same) {
3000 sdev->no_write_same = 1;
3001
3002 return;
3003 }
3004
66c28f97 3005 if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, INQUIRY) < 0) {
af73623f
BS		 3006 /* too large values might cause issues with arcmsr */
3007 int vpd_buf_len = 64;
3008
66c28f97
MP		 3009 sdev->no_report_opcodes = 1;
3010
3011 /* Disable WRITE SAME if REPORT SUPPORTED OPERATION
3012 * CODES is unsupported and the device has an ATA
3013 * Information VPD page (SAT).
3014 */
af73623f 3015 if (!scsi_get_vpd_page(sdev, 0x89, buffer, vpd_buf_len))
66c28f97
MP		 3016 sdev->no_write_same = 1;
3017 }
3018
3019 if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME_16) == 1)
5db44863 3020 sdkp->ws16 = 1;
66c28f97
MP		 3021
3022 if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME) == 1)
3023 sdkp->ws10 = 1;
5db44863
MP		 3024}
3025
d80210f2
CH		 3026static void sd_read_security(struct scsi_disk *sdkp, unsigned char *buffer)
3027{
3028 struct scsi_device *sdev = sdkp->device;
3029
3030 if (!sdev->security_supported)
3031 return;
3032
3033 if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE,
3034 SECURITY_PROTOCOL_IN) == 1 &&
3035 scsi_report_opcode(sdev, buffer, SD_BUF_SIZE,
3036 SECURITY_PROTOCOL_OUT) == 1)
3037 sdkp->security = 1;
3038}
3039
a83da8a4
MP		 3040/*
3041 * Determine the device's preferred I/O size for reads and writes
3042 * unless the reported value is unreasonably small, large, not a
3043 * multiple of the physical block size, or simply garbage.
3044 */
3045static bool sd_validate_opt_xfer_size(struct scsi_disk *sdkp,
3046 unsigned int dev_max)
3047{
3048 struct scsi_device *sdp = sdkp->device;
3049 unsigned int opt_xfer_bytes =
3050 logical_to_bytes(sdp, sdkp->opt_xfer_blocks);
3051
1d5de5bd
MP		 3052 if (sdkp->opt_xfer_blocks == 0)
3053 return false;
3054
a83da8a4
MP		 3055 if (sdkp->opt_xfer_blocks > dev_max) {
3056 sd_first_printk(KERN_WARNING, sdkp,
3057 "Optimal transfer size %u logical blocks " \
3058 "> dev_max (%u logical blocks)\n",
3059 sdkp->opt_xfer_blocks, dev_max);
3060 return false;
3061 }
3062
3063 if (sdkp->opt_xfer_blocks > SD_DEF_XFER_BLOCKS) {
3064 sd_first_printk(KERN_WARNING, sdkp,
3065 "Optimal transfer size %u logical blocks " \
3066 "> sd driver limit (%u logical blocks)\n",
3067 sdkp->opt_xfer_blocks, SD_DEF_XFER_BLOCKS);
3068 return false;
3069 }
3070
3071 if (opt_xfer_bytes < PAGE_SIZE) {
3072 sd_first_printk(KERN_WARNING, sdkp,
3073 "Optimal transfer size %u bytes < " \
3074 "PAGE_SIZE (%u bytes)\n",
3075 opt_xfer_bytes, (unsigned int)PAGE_SIZE);
3076 return false;
3077 }
3078
3079 if (opt_xfer_bytes & (sdkp->physical_block_size - 1)) {
3080 sd_first_printk(KERN_WARNING, sdkp,
3081 "Optimal transfer size %u bytes not a " \
3082 "multiple of physical block size (%u bytes)\n",
3083 opt_xfer_bytes, sdkp->physical_block_size);
3084 return false;
3085 }
3086
3087 sd_first_printk(KERN_INFO, sdkp, "Optimal transfer size %u bytes\n",
3088 opt_xfer_bytes);
3089 return true;
3090}
3091
1da177e4
LT		 3092/**
3093 * sd_revalidate_disk - called the first time a new disk is seen,
3094 * performs disk spin up, read_capacity, etc.
3095 * @disk: struct gendisk we care about
3096 **/
3097static int sd_revalidate_disk(struct gendisk *disk)
3098{
3099 struct scsi_disk *sdkp = scsi_disk(disk);
3100 struct scsi_device *sdp = sdkp->device;
ca369d51 3101 struct request_queue *q = sdkp->disk->queue;
89d94756 3102 sector_t old_capacity = sdkp->capacity;
1da177e4 3103 unsigned char *buffer;
ca369d51 3104 unsigned int dev_max, rw_max;
1da177e4 3105
fa0d34be
MP		 3106 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp,
3107 "sd_revalidate_disk\n"));
1da177e4
LT		 3108
3109 /*
3110 * If the device is offline, don't try and read capacity or any
3111 * of the other niceties.
3112 */
3113 if (!scsi_device_online(sdp))
3114 goto out;
3115
a6123f14 3116 buffer = kmalloc(SD_BUF_SIZE, GFP_KERNEL);
1da177e4 3117 if (!buffer) {
e73aec82
MP		 3118 sd_printk(KERN_WARNING, sdkp, "sd_revalidate_disk: Memory "
3119 "allocation failure.\n");
ea73a9f2 3120 goto out;
1da177e4
LT		 3121 }
3122
e73aec82 3123 sd_spinup_disk(sdkp);
1da177e4
LT		 3124
3125 /*
3126 * Without media there is no reason to ask; moreover, some devices
3127 * react badly if we do.
3128 */
3129 if (sdkp->media_present) {
e73aec82 3130 sd_read_capacity(sdkp, buffer);
ffd4bc2a 3131
e4a05698
JB		 3132 /*
3133 * set the default to rotational. All non-rotational devices
3134 * support the block characteristics VPD page, which will
3135 * cause this to be updated correctly and any device which
3136 * doesn't support it should be treated as rotational.
3137 */
3138 blk_queue_flag_clear(QUEUE_FLAG_NONROT, q);
3139 blk_queue_flag_set(QUEUE_FLAG_ADD_RANDOM, q);
3140
5ddfe085 3141 if (scsi_device_supports_vpd(sdp)) {
c98a0eb0 3142 sd_read_block_provisioning(sdkp);
ffd4bc2a
MP		 3143 sd_read_block_limits(sdkp);
3144 sd_read_block_characteristics(sdkp);
89d94756 3145 sd_zbc_read_zones(sdkp, buffer);
ffd4bc2a
MP		 3146 }
3147
89d94756
HR		 3148 sd_print_capacity(sdkp, old_capacity);
3149
e73aec82
MP		 3150 sd_read_write_protect_flag(sdkp, buffer);
3151 sd_read_cache_type(sdkp, buffer);
e0597d70 3152 sd_read_app_tag_own(sdkp, buffer);
5db44863 3153 sd_read_write_same(sdkp, buffer);
d80210f2 3154 sd_read_security(sdkp, buffer);
1da177e4 3155 }
461d4e90
TH		 3156
3157 /*
3158 * We now have all cache related info, determine how we deal
4913efe4 3159 * with flush requests.
461d4e90 3160 */
cb2fb68d 3161 sd_set_flush_flag(sdkp);
461d4e90 3162
ca369d51
MP		 3163 /* Initial block count limit based on CDB TRANSFER LENGTH field size. */
3164 dev_max = sdp->use_16_for_rw ? SD_MAX_XFER_BLOCKS : SD_DEF_XFER_BLOCKS;
3165
3166 /* Some devices report a maximum block count for READ/WRITE requests. */
3167 dev_max = min_not_zero(dev_max, sdkp->max_xfer_blocks);
3168 q->limits.max_dev_sectors = logical_to_sectors(sdp, dev_max);
3169
a83da8a4 3170 if (sd_validate_opt_xfer_size(sdkp, dev_max)) {
6b7e9cde
MP		 3171 q->limits.io_opt = logical_to_bytes(sdp, sdkp->opt_xfer_blocks);
3172 rw_max = logical_to_sectors(sdp, sdkp->opt_xfer_blocks);
3173 } else
67804145
FZ		 3174 rw_max = min_not_zero(logical_to_sectors(sdp, dev_max),
3175 (sector_t)BLK_DEF_MAX_SECTORS);
3a9794d3 3176
77082ca5
MP		 3177 /* Do not exceed controller limit */
3178 rw_max = min(rw_max, queue_max_hw_sectors(q));
3179
3180 /*
3181 * Only update max_sectors if previously unset or if the current value
3182 * exceeds the capabilities of the hardware.
3183 */
3184 if (sdkp->first_scan ||
3185 q->limits.max_sectors > q->limits.max_dev_sectors ||
3186 q->limits.max_sectors > q->limits.max_hw_sectors)
3187 q->limits.max_sectors = rw_max;
3188
3189 sdkp->first_scan = 0;
4f258a46 3190
f08bb1e0 3191 set_capacity(disk, logical_to_sectors(sdp, sdkp->capacity));
5db44863 3192 sd_config_write_same(sdkp);
1da177e4
LT		 3193 kfree(buffer);
3194
1da177e4
LT		 3195 out:
3196 return 0;
3197}
3198
72ec24bd
TH		 3199/**
3200 * sd_unlock_native_capacity - unlock native capacity
3201 * @disk: struct gendisk to set capacity for
3202 *
3203 * Block layer calls this function if it detects that partitions
3204 * on @disk reach beyond the end of the device. If the SCSI host
3205 * implements ->unlock_native_capacity() method, it's invoked to
3206 * give it a chance to adjust the device capacity.
3207 *
3208 * CONTEXT:
3209 * Defined by block layer. Might sleep.
3210 */
3211static void sd_unlock_native_capacity(struct gendisk *disk)
3212{
3213 struct scsi_device *sdev = scsi_disk(disk)->device;
3214
3215 if (sdev->host->hostt->unlock_native_capacity)
3216 sdev->host->hostt->unlock_native_capacity(sdev);
3217}
3218
3e1a7ff8
TH		 3219/**
3220 * sd_format_disk_name - format disk name
3221 * @prefix: name prefix - ie. "sd" for SCSI disks
3222 * @index: index of the disk to format name for
3223 * @buf: output buffer
3224 * @buflen: length of the output buffer
3225 *
3226 * SCSI disk names starts at sda. The 26th device is sdz and the
3227 * 27th is sdaa. The last one for two lettered suffix is sdzz
3228 * which is followed by sdaaa.
3229 *
3230 * This is basically 26 base counting with one extra 'nil' entry
3ad2f3fb 3231 * at the beginning from the second digit on and can be
3e1a7ff8
TH		 3232 * determined using similar method as 26 base conversion with the
3233 * index shifted -1 after each digit is computed.
3234 *
3235 * CONTEXT:
3236 * Don't care.
3237 *
3238 * RETURNS:
3239 * 0 on success, -errno on failure.
3240 */
3241static int sd_format_disk_name(char *prefix, int index, char *buf, int buflen)
3242{
3243 const int base = 'z' - 'a' + 1;
3244 char *begin = buf + strlen(prefix);
3245 char *end = buf + buflen;
3246 char *p;
3247 int unit;
3248
3249 p = end - 1;
3250 *p = '\0';
3251 unit = base;
3252 do {
3253 if (p == begin)
3254 return -EINVAL;
3255 *--p = 'a' + (index % unit);
3256 index = (index / unit) - 1;
3257 } while (index >= 0);
3258
3259 memmove(begin, p, end - p);
3260 memcpy(buf, prefix, strlen(prefix));
3261
3262 return 0;
3263}
3264
1da177e4
LT		 3265/**
3266 * sd_probe - called during driver initialization and whenever a
3267 * new scsi device is attached to the system. It is called once
3268 * for each scsi device (not just disks) present.
3269 * @dev: pointer to device object
3270 *
3271 * Returns 0 if successful (or not interested in this scsi device
3272 * (e.g. scanner)); 1 when there is an error.
3273 *
3274 * Note: this function is invoked from the scsi mid-level.
3275 * This function sets up the mapping between a given
3276 * <host,channel,id,lun> (found in sdp) and new device name
3277 * (e.g. /dev/sda). More precisely it is the block device major
3278 * and minor number that is chosen here.
3279 *
2db93ce8
PU		 3280 * Assume sd_probe is not re-entrant (for time being)
3281 * Also think about sd_probe() and sd_remove() running coincidentally.
1da177e4
LT		 3282 **/
3283static int sd_probe(struct device *dev)
3284{
3285 struct scsi_device *sdp = to_scsi_device(dev);
3286 struct scsi_disk *sdkp;
3287 struct gendisk *gd;
439d77f7 3288 int index;
1da177e4
LT		 3289 int error;
3290
6fe8c1db 3291 scsi_autopm_get_device(sdp);
1da177e4 3292 error = -ENODEV;
89d94756
HR		 3293 if (sdp->type != TYPE_DISK &&
3294 sdp->type != TYPE_ZBC &&
3295 sdp->type != TYPE_MOD &&
3296 sdp->type != TYPE_RBC)
1da177e4
LT		 3297 goto out;
3298
89d94756
HR		 3299#ifndef CONFIG_BLK_DEV_ZONED
3300 if (sdp->type == TYPE_ZBC)
3301 goto out;
3302#endif
9ccfc756 3303 SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO, sdp,
2db93ce8 3304 "sd_probe\n"));
1da177e4
LT		 3305
3306 error = -ENOMEM;
24669f75 3307 sdkp = kzalloc(sizeof(*sdkp), GFP_KERNEL);
1da177e4
LT		 3308 if (!sdkp)
3309 goto out;
3310
689d6fac 3311 gd = alloc_disk(SD_MINORS);
1da177e4 3312 if (!gd)
c01228db 3313 goto out_free;
1da177e4 3314
94015080
MW		 3315 index = ida_alloc(&sd_index_ida, GFP_KERNEL);
3316 if (index < 0) {
21208ae5 3317 sdev_printk(KERN_WARNING, sdp, "sd_probe: memory exhausted.\n");
1da177e4 3318 goto out_put;
1a03ae0f
MR		 3319 }
3320
3e1a7ff8 3321 error = sd_format_disk_name("sd", index, gd->disk_name, DISK_NAME_LEN);
21208ae5
DK		 3322 if (error) {
3323 sdev_printk(KERN_WARNING, sdp, "SCSI disk (sd) name length exceeded.\n");
f27bac27 3324 goto out_free_index;
21208ae5 3325 }
f27bac27 3326
1da177e4
LT		 3327 sdkp->device = sdp;
3328 sdkp->driver = &sd_template;
3329 sdkp->disk = gd;
3330 sdkp->index = index;
409f3499 3331 atomic_set(&sdkp->openers, 0);
9e1a1537 3332 atomic_set(&sdkp->device->ioerr_cnt, 0);
1da177e4 3333
601e7638
JB		 3334 if (!sdp->request_queue->rq_timeout) {
3335 if (sdp->type != TYPE_MOD)
3336 blk_queue_rq_timeout(sdp->request_queue, SD_TIMEOUT);
3337 else
3338 blk_queue_rq_timeout(sdp->request_queue,
3339 SD_MOD_TIMEOUT);
3340 }
3341
3342 device_initialize(&sdkp->dev);
478a8a05 3343 sdkp->dev.parent = dev;
601e7638 3344 sdkp->dev.class = &sd_disk_class;
02aa2a37 3345 dev_set_name(&sdkp->dev, "%s", dev_name(dev));
601e7638 3346
dee0586e
DC		 3347 error = device_add(&sdkp->dev);
3348 if (error)
601e7638
JB		 3349 goto out_free_index;
3350
478a8a05
AS		 3351 get_device(dev);
3352 dev_set_drvdata(dev, sdkp);
601e7638 3353
82a54da6
BVA		 3354 gd->major = sd_major((index & 0xf0) >> 4);
3355 gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00);
3356
3357 gd->fops = &sd_fops;
3358 gd->private_data = &sdkp->driver;
3359 gd->queue = sdkp->device->request_queue;
3360
3361 /* defaults, until the device tells us otherwise */
3362 sdp->sector_size = 512;
3363 sdkp->capacity = 0;
3364 sdkp->media_present = 1;
3365 sdkp->write_prot = 0;
3366 sdkp->cache_override = 0;
3367 sdkp->WCE = 0;
3368 sdkp->RCD = 0;
3369 sdkp->ATO = 0;
3370 sdkp->first_scan = 1;
3371 sdkp->max_medium_access_timeouts = SD_MAX_MEDIUM_TIMEOUTS;
3372
3373 sd_revalidate_disk(gd);
3374
3375 gd->flags = GENHD_FL_EXT_DEVT;
3376 if (sdp->removable) {
3377 gd->flags |= GENHD_FL_REMOVABLE;
3378 gd->events |= DISK_EVENT_MEDIA_CHANGE;
3379 gd->event_flags = DISK_EVENT_FLAG_POLL | DISK_EVENT_FLAG_UEVENT;
3380 }
3381
3382 blk_pm_runtime_init(sdp->request_queue, dev);
3383 device_add_disk(dev, gd, NULL);
3384 if (sdkp->capacity)
3385 sd_dif_config_host(sdkp);
3386
3387 sd_revalidate_disk(gd);
3388
3389 if (sdkp->security) {
3390 sdkp->opal_dev = init_opal_dev(sdp, &sd_sec_submit);
3391 if (sdkp->opal_dev)
3392 sd_printk(KERN_NOTICE, sdkp, "supports TCG Opal\n");
3393 }
3394
3395 sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n",
3396 sdp->removable ? "removable " : "");
3397 scsi_autopm_put_device(sdp);
1da177e4
LT		 3398
3399 return 0;
3400
f27bac27 3401 out_free_index:
94015080 3402 ida_free(&sd_index_ida, index);
6bdaa1f1 3403 out_put:
1da177e4 3404 put_disk(gd);
f170396c
CIK		 3405 out_free:
3406 kfree(sdkp);
6bdaa1f1 3407 out:
6fe8c1db 3408 scsi_autopm_put_device(sdp);
1da177e4
LT		 3409 return error;
3410}
3411
3412/**
3413 * sd_remove - called whenever a scsi disk (previously recognized by
3414 * sd_probe) is detached from the system. It is called (potentially
3415 * multiple times) during sd module unload.
f2a3313d 3416 * @dev: pointer to device object
1da177e4
LT		 3417 *
3418 * Note: this function is invoked from the scsi mid-level.
3419 * This function potentially frees up a device name (e.g. /dev/sdc)
3420 * that could be re-used by a subsequent sd_probe().
3421 * This function is not called when the built-in sd driver is "exit-ed".
3422 **/
3423static int sd_remove(struct device *dev)
3424{
601e7638 3425 struct scsi_disk *sdkp;
0761df9c 3426 dev_t devt;
1da177e4 3427
601e7638 3428 sdkp = dev_get_drvdata(dev);
0761df9c 3429 devt = disk_devt(sdkp->disk);
478a8a05
AS		 3430 scsi_autopm_get_device(sdkp->device);
3431
3c31b52f 3432 async_synchronize_full_domain(&scsi_sd_pm_domain);
ee959b00 3433 device_del(&sdkp->dev);
1da177e4
LT		 3434 del_gendisk(sdkp->disk);
3435 sd_shutdown(dev);
39b7f1e2 3436
d80210f2
CH		 3437 free_opal_dev(sdkp->opal_dev);
3438
0761df9c
HR		 3439 blk_register_region(devt, SD_MINORS, NULL,
3440 sd_default_probe, NULL, NULL);
3441
0b950672 3442 mutex_lock(&sd_ref_mutex);
39b7f1e2 3443 dev_set_drvdata(dev, NULL);
ee959b00 3444 put_device(&sdkp->dev);
0b950672 3445 mutex_unlock(&sd_ref_mutex);
1da177e4
LT		 3446
3447 return 0;
3448}
3449
3450/**
3451 * scsi_disk_release - Called to free the scsi_disk structure
ee959b00 3452 * @dev: pointer to embedded class device
1da177e4 3453 *
0b950672 3454 * sd_ref_mutex must be held entering this routine. Because it is
1da177e4
LT		 3455 * called on last put, you should always use the scsi_disk_get()
3456 * scsi_disk_put() helpers which manipulate the semaphore directly
ee959b00 3457 * and never do a direct put_device.
1da177e4 3458 **/
ee959b00 3459static void scsi_disk_release(struct device *dev)
1da177e4 3460{
ee959b00 3461 struct scsi_disk *sdkp = to_scsi_disk(dev);
1da177e4 3462 struct gendisk *disk = sdkp->disk;
c14a5726
BVA		 3463 struct request_queue *q = disk->queue;
3464
94015080 3465 ida_free(&sd_index_ida, sdkp->index);
c01228db 3466
c14a5726
BVA		 3467 /*
3468 * Wait until all requests that are in progress have completed.
3469 * This is necessary to avoid that e.g. scsi_end_request() crashes
3470 * due to clearing the disk->private_data pointer. Wait from inside
3471 * scsi_disk_release() instead of from sd_release() to avoid that
3472 * freezing and unfreezing the request queue affects user space I/O
3473 * in case multiple processes open a /dev/sd... node concurrently.
3474 */
3475 blk_mq_freeze_queue(q);
3476 blk_mq_unfreeze_queue(q);
3477
1da177e4 3478 disk->private_data = NULL;
1da177e4 3479 put_disk(disk);
39b7f1e2 3480 put_device(&sdkp->device->sdev_gendev);
1da177e4
LT		 3481
3482 kfree(sdkp);
3483}
3484
cc5d2c8c 3485static int sd_start_stop_device(struct scsi_disk *sdkp, int start)
c3c94c5a
TH		 3486{
3487 unsigned char cmd[6] = { START_STOP }; /* START_VALID */
3488 struct scsi_sense_hdr sshdr;
cc5d2c8c 3489 struct scsi_device *sdp = sdkp->device;
c3c94c5a
TH		 3490 int res;
3491
3492 if (start)
3493 cmd[4] |= 1; /* START */
3494
d2886ea3
SR		 3495 if (sdp->start_stop_pwr_cond)
3496 cmd[4] |= start ? 1 << 4 : 3 << 4; /* Active or Standby */
3497
c3c94c5a
TH		 3498 if (!scsi_device_online(sdp))
3499 return -ENODEV;
3500
fcbfffe2
CH		 3501 res = scsi_execute(sdp, cmd, DMA_NONE, NULL, 0, NULL, &sshdr,
3502 SD_TIMEOUT, SD_MAX_RETRIES, 0, RQF_PM, NULL);
c3c94c5a 3503 if (res) {
ef61329d 3504 sd_print_result(sdkp, "Start/Stop Unit failed", res);
c65be1a6 3505 if (driver_byte(res) == DRIVER_SENSE)
cc5d2c8c 3506 sd_print_sense_hdr(sdkp, &sshdr);
95897910
ON		 3507 if (scsi_sense_valid(&sshdr) &&
3508 /* 0x3a is medium not present */
3509 sshdr.asc == 0x3a)
3510 res = 0;
c3c94c5a
TH		 3511 }
3512
95897910
ON		 3513 /* SCSI error codes must not go to the generic layer */
3514 if (res)
3515 return -EIO;
3516
3517 return 0;
c3c94c5a
TH		 3518}
3519
1da177e4
LT		 3520/*
3521 * Send a SYNCHRONIZE CACHE instruction down to the device through
3522 * the normal SCSI command structure. Wait for the command to
3523 * complete.
3524 */
3525static void sd_shutdown(struct device *dev)
3526{
3d9a1f53 3527 struct scsi_disk *sdkp = dev_get_drvdata(dev);
1da177e4
LT		 3528
3529 if (!sdkp)
3530 return; /* this can happen */
3531
54f57588 3532 if (pm_runtime_suspended(dev))
3d9a1f53 3533 return;
54f57588 3534
95897910 3535 if (sdkp->WCE && sdkp->media_present) {
e73aec82 3536 sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n");
4fa83244 3537 sd_sync_cache(sdkp, NULL);
39b7f1e2 3538 }
c3c94c5a 3539
cc5d2c8c
JB		 3540 if (system_state != SYSTEM_RESTART && sdkp->device->manage_start_stop) {
3541 sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n");
3542 sd_start_stop_device(sdkp, 0);
c3c94c5a 3543 }
39b7f1e2 3544}
1da177e4 3545
95897910 3546static int sd_suspend_common(struct device *dev, bool ignore_stop_errors)
c3c94c5a 3547{
3d9a1f53 3548 struct scsi_disk *sdkp = dev_get_drvdata(dev);
4fa83244 3549 struct scsi_sense_hdr sshdr;
09ff92fe 3550 int ret = 0;
c3c94c5a 3551
13b43891
AS		 3552 if (!sdkp) /* E.g.: runtime suspend following sd_remove() */
3553 return 0;
c3c94c5a 3554
95897910 3555 if (sdkp->WCE && sdkp->media_present) {
cc5d2c8c 3556 sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n");
4fa83244
DB		 3557 ret = sd_sync_cache(sdkp, &sshdr);
3558
95897910
ON		 3559 if (ret) {
3560 /* ignore OFFLINE device */
3561 if (ret == -ENODEV)
4fa83244
DB		 3562 return 0;
3563
3564 if (!scsi_sense_valid(&sshdr) ||
3565 sshdr.sense_key != ILLEGAL_REQUEST)
3566 return ret;
3567
3568 /*
3569 * sshdr.sense_key == ILLEGAL_REQUEST means this drive
3570 * doesn't support sync. There's not much to do and
3571 * suspend shouldn't fail.
3572 */
ed91f7ed 3573 ret = 0;
95897910 3574 }
c3c94c5a
TH		 3575 }
3576
691e3d31 3577 if (sdkp->device->manage_start_stop) {
cc5d2c8c 3578 sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n");
95897910 3579 /* an error is not worth aborting a system sleep */
cc5d2c8c 3580 ret = sd_start_stop_device(sdkp, 0);
95897910
ON		 3581 if (ignore_stop_errors)
3582 ret = 0;
c3c94c5a
TH		 3583 }
3584
09ff92fe 3585 return ret;
c3c94c5a
TH		 3586}
3587
95897910
ON		 3588static int sd_suspend_system(struct device *dev)
3589{
3590 return sd_suspend_common(dev, true);
3591}
3592
3593static int sd_suspend_runtime(struct device *dev)
3594{
3595 return sd_suspend_common(dev, false);
3596}
3597
c3c94c5a
TH		 3598static int sd_resume(struct device *dev)
3599{
3d9a1f53 3600 struct scsi_disk *sdkp = dev_get_drvdata(dev);
d80210f2 3601 int ret;
c3c94c5a 3602
13b43891
AS		 3603 if (!sdkp) /* E.g.: runtime resume at the start of sd_probe() */
3604 return 0;
3605
cc5d2c8c 3606 if (!sdkp->device->manage_start_stop)
3d9a1f53 3607 return 0;
c3c94c5a 3608
cc5d2c8c 3609 sd_printk(KERN_NOTICE, sdkp, "Starting disk\n");
d80210f2
CH		 3610 ret = sd_start_stop_device(sdkp, 1);
3611 if (!ret)
3612 opal_unlock_from_suspend(sdkp->opal_dev);
3613 return ret;
c3c94c5a
TH		 3614}
3615
1da177e4
LT		 3616/**
3617 * init_sd - entry point for this driver (both when built in or when
3618 * a module).
3619 *
3620 * Note: this function registers this driver with the scsi mid-level.
3621 **/
3622static int __init init_sd(void)
3623{
5e4009ba 3624 int majors = 0, i, err;
1da177e4
LT		 3625
3626 SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n"));
3627
0761df9c
HR		 3628 for (i = 0; i < SD_MAJORS; i++) {
3629 if (register_blkdev(sd_major(i), "sd") != 0)
3630 continue;
3631 majors++;
3632 blk_register_region(sd_major(i), SD_MINORS, NULL,
3633 sd_default_probe, NULL, NULL);
3634 }
1da177e4
LT		 3635
3636 if (!majors)
3637 return -ENODEV;
3638
5e4009ba
JG		 3639 err = class_register(&sd_disk_class);
3640 if (err)
3641 goto err_out;
6bdaa1f1 3642
4e7392ec
MP		 3643 sd_cdb_cache = kmem_cache_create("sd_ext_cdb", SD_EXT_CDB_SIZE,
3644 0, 0, NULL);
3645 if (!sd_cdb_cache) {
3646 printk(KERN_ERR "sd: can't init extended cdb cache\n");
8d964478 3647 err = -ENOMEM;
4e7392ec
MP		 3648 goto err_out_class;
3649 }
3650
3651 sd_cdb_pool = mempool_create_slab_pool(SD_MEMPOOL_SIZE, sd_cdb_cache);
3652 if (!sd_cdb_pool) {
3653 printk(KERN_ERR "sd: can't init extended cdb pool\n");
8d964478 3654 err = -ENOMEM;
4e7392ec
MP		 3655 goto err_out_cache;
3656 }
3657
61cce6f6
JA		 3658 sd_page_pool = mempool_create_page_pool(SD_MEMPOOL_SIZE, 0);
3659 if (!sd_page_pool) {
3660 printk(KERN_ERR "sd: can't init discard page pool\n");
3661 err = -ENOMEM;
3662 goto err_out_ppool;
3663 }
3664
afd5e34b
JD		 3665 err = scsi_register_driver(&sd_template.gendrv);
3666 if (err)
3667 goto err_out_driver;
3668
5e4009ba
JG		 3669 return 0;
3670
afd5e34b 3671err_out_driver:
61cce6f6
JA		 3672 mempool_destroy(sd_page_pool);
3673
3674err_out_ppool:
afd5e34b
JD		 3675 mempool_destroy(sd_cdb_pool);
3676
4e7392ec
MP		 3677err_out_cache:
3678 kmem_cache_destroy(sd_cdb_cache);
3679
5e4009ba
JG		 3680err_out_class:
3681 class_unregister(&sd_disk_class);
3682err_out:
3683 for (i = 0; i < SD_MAJORS; i++)
3684 unregister_blkdev(sd_major(i), "sd");
3685 return err;
1da177e4
LT		 3686}
3687
3688/**
3689 * exit_sd - exit point for this driver (when it is a module).
3690 *
3691 * Note: this function unregisters this driver from the scsi mid-level.
3692 **/
3693static void __exit exit_sd(void)
3694{
3695 int i;
3696
3697 SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n"));
3698
afd5e34b 3699 scsi_unregister_driver(&sd_template.gendrv);
4e7392ec 3700 mempool_destroy(sd_cdb_pool);
61cce6f6 3701 mempool_destroy(sd_page_pool);
4e7392ec
MP		 3702 kmem_cache_destroy(sd_cdb_cache);
3703
5e4009ba
JG		 3704 class_unregister(&sd_disk_class);
3705
0761df9c
HR		 3706 for (i = 0; i < SD_MAJORS; i++) {
3707 blk_unregister_region(sd_major(i), SD_MINORS);
1da177e4 3708 unregister_blkdev(sd_major(i), "sd");
0761df9c 3709 }
1da177e4
LT		 3710}
3711
1da177e4
LT		 3712module_init(init_sd);
3713module_exit(exit_sd);
e73aec82
MP		 3714
3715static void sd_print_sense_hdr(struct scsi_disk *sdkp,
3716 struct scsi_sense_hdr *sshdr)
3717{
21045519
HR		 3718 scsi_print_sense_hdr(sdkp->device,
3719 sdkp->disk ? sdkp->disk->disk_name : NULL, sshdr);
e73aec82
MP		 3720}
3721
ef61329d
HR		 3722static void sd_print_result(const struct scsi_disk *sdkp, const char *msg,
3723 int result)
e73aec82 3724{
ef61329d
HR		 3725 const char *hb_string = scsi_hostbyte_string(result);
3726 const char *db_string = scsi_driverbyte_string(result);
3727
3728 if (hb_string || db_string)
3729 sd_printk(KERN_INFO, sdkp,
3730 "%s: Result: hostbyte=%s driverbyte=%s\n", msg,
3731 hb_string ? hb_string : "invalid",
3732 db_string ? db_string : "invalid");
3733 else
3734 sd_printk(KERN_INFO, sdkp,
3735 "%s: Result: hostbyte=0x%02x driverbyte=0x%02x\n",
3736 msg, host_byte(result), driver_byte(result));
e73aec82
MP		 3737}
3738
Linux 6.x block layer and io_uring tree(s)