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scsi: lpfc: fix lpfc_nvmet_mrq to be bound by hdw queue count
[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));
e249e42d 1169 bool dif, dix;
ec029758 1170 unsigned int mask = logical_to_sectors(sdp, 1) - 1;
78a02f49
MP		 1171 bool write = rq_data_dir(rq) == WRITE;
1172 unsigned char protect, fua;
159b2cbf 1173 blk_status_t ret;
7f9a6bc4 1174
cf64e5a5 1175 ret = scsi_init_io(cmd);
159b2cbf 1176 if (ret != BLK_STS_OK)
39051dd8 1177 return ret;
7f9a6bc4 1178
e249e42d 1179 if (!scsi_device_online(sdp) || sdp->changed) {
cf64e5a5 1180 scmd_printk(KERN_ERR, cmd, "device offline or changed\n");
159b2cbf 1181 return BLK_STS_IOERR;
1da177e4
LT		 1182 }
1183
e249e42d 1184 if (blk_rq_pos(rq) + blk_rq_sectors(rq) > get_capacity(rq->rq_disk)) {
cf64e5a5 1185 scmd_printk(KERN_ERR, cmd, "access beyond end of device\n");
e249e42d
MP		 1186 return BLK_STS_IOERR;
1187 }
1188
1189 if ((blk_rq_pos(rq) & mask) || (blk_rq_sectors(rq) & mask)) {
cf64e5a5 1190 scmd_printk(KERN_ERR, cmd, "request not aligned to the logical block size\n");
159b2cbf 1191 return BLK_STS_IOERR;
1da177e4 1192 }
7f9a6bc4 1193
a0899d4d 1194 /*
ec029758
MP		 1195 * Some SD card readers can't handle accesses which touch the
1196 * last one or two logical blocks. Split accesses as needed.
a0899d4d 1197 */
ec029758 1198 threshold = sdkp->capacity - SD_LAST_BUGGY_SECTORS;
18351070 1199
c6c93fdd
MP		 1200 if (unlikely(sdp->last_sector_bug && lba + nr_blocks > threshold)) {
1201 if (lba < threshold) {
18351070 1202 /* Access up to the threshold but not beyond */
c6c93fdd 1203 nr_blocks = threshold - lba;
18351070 1204 } else {
ec029758
MP		 1205 /* Access only a single logical block */
1206 nr_blocks = 1;
18351070
LT		 1207 }
1208 }
a0899d4d 1209
78a02f49 1210 fua = rq->cmd_flags & REQ_FUA ? 0x8 : 0;
cf64e5a5
BVA		 1211 dix = scsi_prot_sg_count(cmd);
1212 dif = scsi_host_dif_capable(cmd->device->host, sdkp->protection_type);
1da177e4 1213
c611529e 1214 if (dif || dix)
cf64e5a5 1215 protect = sd_setup_protect_cmnd(cmd, dix, dif);
af55ff67 1216 else
4e7392ec
MP		 1217 protect = 0;
1218
8475c811 1219 if (protect && sdkp->protection_type == T10_PI_TYPE2_PROTECTION) {
cf64e5a5 1220 ret = sd_setup_rw32_cmnd(cmd, write, lba, nr_blocks,
78a02f49 1221 protect | fua);
c6c93fdd 1222 } else if (sdp->use_16_for_rw || (nr_blocks > 0xffff)) {
cf64e5a5 1223 ret = sd_setup_rw16_cmnd(cmd, write, lba, nr_blocks,
78a02f49 1224 protect | fua);
c6c93fdd 1225 } else if ((nr_blocks > 0xff) || (lba > 0x1fffff) ||
e249e42d 1226 sdp->use_10_for_rw || protect) {
cf64e5a5 1227 ret = sd_setup_rw10_cmnd(cmd, write, lba, nr_blocks,
78a02f49 1228 protect | fua);
1da177e4 1229 } else {
cf64e5a5 1230 ret = sd_setup_rw6_cmnd(cmd, write, lba, nr_blocks,
78a02f49 1231 protect | fua);
1da177e4 1232 }
78a02f49
MP		 1233
1234 if (unlikely(ret != BLK_STS_OK))
1235 return ret;
1da177e4
LT		 1236
1237 /*
1238 * We shouldn't disconnect in the middle of a sector, so with a dumb
1239 * host adapter, it's safe to assume that we can at least transfer
1240 * this many bytes between each connect / disconnect.
1241 */
cf64e5a5
BVA		 1242 cmd->transfersize = sdp->sector_size;
1243 cmd->underflow = nr_blocks << 9;
1244 cmd->allowed = SD_MAX_RETRIES;
1245 cmd->sdb.length = nr_blocks * sdp->sector_size;
e249e42d
MP		 1246
1247 SCSI_LOG_HLQUEUE(1,
cf64e5a5 1248 scmd_printk(KERN_INFO, cmd,
e249e42d
MP		 1249 "%s: block=%llu, count=%d\n", __func__,
1250 (unsigned long long)blk_rq_pos(rq),
1251 blk_rq_sectors(rq)));
1252 SCSI_LOG_HLQUEUE(2,
cf64e5a5 1253 scmd_printk(KERN_INFO, cmd,
e249e42d
MP		 1254 "%s %d/%u 512 byte blocks.\n",
1255 write ? "writing" : "reading", nr_blocks,
1256 blk_rq_sectors(rq)));
1da177e4 1257
1da177e4
LT		 1258 /*
1259 * This indicates that the command is ready from our end to be
1260 * queued.
1261 */
159b2cbf 1262 return BLK_STS_OK;
1da177e4
LT		 1263}
1264
159b2cbf 1265static blk_status_t sd_init_command(struct scsi_cmnd *cmd)
87949eee
CH		 1266{
1267 struct request *rq = cmd->request;
1268
c2df40df
MC		 1269 switch (req_op(rq)) {
1270 case REQ_OP_DISCARD:
81d926e8
CH		 1271 switch (scsi_disk(rq->rq_disk)->provisioning_mode) {
1272 case SD_LBP_UNMAP:
1273 return sd_setup_unmap_cmnd(cmd);
1274 case SD_LBP_WS16:
02d26103 1275 return sd_setup_write_same16_cmnd(cmd, true);
81d926e8
CH		 1276 case SD_LBP_WS10:
1277 return sd_setup_write_same10_cmnd(cmd, true);
1278 case SD_LBP_ZERO:
1279 return sd_setup_write_same10_cmnd(cmd, false);
1280 default:
159b2cbf 1281 return BLK_STS_TARGET;
81d926e8 1282 }
02d26103
CH		 1283 case REQ_OP_WRITE_ZEROES:
1284 return sd_setup_write_zeroes_cmnd(cmd);
c2df40df 1285 case REQ_OP_WRITE_SAME:
87949eee 1286 return sd_setup_write_same_cmnd(cmd);
3a5e02ce 1287 case REQ_OP_FLUSH:
87949eee 1288 return sd_setup_flush_cmnd(cmd);
c2df40df
MC		 1289 case REQ_OP_READ:
1290 case REQ_OP_WRITE:
87949eee 1291 return sd_setup_read_write_cmnd(cmd);
89d94756 1292 case REQ_OP_ZONE_RESET:
d81e9d49
CK		 1293 return sd_zbc_setup_reset_cmnd(cmd, false);
1294 case REQ_OP_ZONE_RESET_ALL:
1295 return sd_zbc_setup_reset_cmnd(cmd, true);
c2df40df 1296 default:
f1f1fada 1297 WARN_ON_ONCE(1);
159b2cbf 1298 return BLK_STS_NOTSUPP;
c2df40df 1299 }
87949eee
CH		 1300}
1301
1302static void sd_uninit_command(struct scsi_cmnd *SCpnt)
1303{
1304 struct request *rq = SCpnt->request;
14e3062f 1305 u8 *cmnd;
87949eee 1306
f9d03f96 1307 if (rq->rq_flags & RQF_SPECIAL_PAYLOAD)
61cce6f6 1308 mempool_free(rq->special_vec.bv_page, sd_page_pool);
87949eee 1309
82ed4db4 1310 if (SCpnt->cmnd != scsi_req(rq)->cmd) {
14e3062f 1311 cmnd = SCpnt->cmnd;
87949eee
CH		 1312 SCpnt->cmnd = NULL;
1313 SCpnt->cmd_len = 0;
14e3062f 1314 mempool_free(cmnd, sd_cdb_pool);
87949eee
CH		 1315 }
1316}
1317
1da177e4
LT		 1318/**
1319 * sd_open - open a scsi disk device
7529fbb0
DLM		 1320 * @bdev: Block device of the scsi disk to open
1321 * @mode: FMODE_* mask
1da177e4
LT		 1322 *
1323 * Returns 0 if successful. Returns a negated errno value in case
1324 * of error.
1325 *
1326 * Note: This can be called from a user context (e.g. fsck(1) )
1327 * or from within the kernel (e.g. as a result of a mount(1) ).
1328 * In the latter case @inode and @filp carry an abridged amount
1329 * of information as noted above.
409f3499
AB		 1330 *
1331 * Locking: called with bdev->bd_mutex held.
1da177e4 1332 **/
0338e291 1333static int sd_open(struct block_device *bdev, fmode_t mode)
1da177e4 1334{
0338e291 1335 struct scsi_disk *sdkp = scsi_disk_get(bdev->bd_disk);
1da177e4
LT		 1336 struct scsi_device *sdev;
1337 int retval;
1338
0338e291 1339 if (!sdkp)
1da177e4
LT		 1340 return -ENXIO;
1341
fa0d34be 1342 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_open\n"));
1da177e4
LT		 1343
1344 sdev = sdkp->device;
1345
1346 /*
1347 * If the device is in error recovery, wait until it is done.
1348 * If the device is offline, then disallow any access to it.
1349 */
1350 retval = -ENXIO;
1351 if (!scsi_block_when_processing_errors(sdev))
1352 goto error_out;
1353
1354 if (sdev->removable || sdkp->write_prot)
0338e291 1355 check_disk_change(bdev);
1da177e4
LT		 1356
1357 /*
1358 * If the drive is empty, just let the open fail.
1359 */
1360 retval = -ENOMEDIUM;
0338e291 1361 if (sdev->removable && !sdkp->media_present && !(mode & FMODE_NDELAY))
1da177e4
LT		 1362 goto error_out;
1363
1364 /*
1365 * If the device has the write protect tab set, have the open fail
1366 * if the user expects to be able to write to the thing.
1367 */
1368 retval = -EROFS;
0338e291 1369 if (sdkp->write_prot && (mode & FMODE_WRITE))
1da177e4
LT		 1370 goto error_out;
1371
1372 /*
1373 * It is possible that the disk changing stuff resulted in
1374 * the device being taken offline. If this is the case,
1375 * report this to the user, and don't pretend that the
1376 * open actually succeeded.
1377 */
1378 retval = -ENXIO;
1379 if (!scsi_device_online(sdev))
1380 goto error_out;
1381
409f3499 1382 if ((atomic_inc_return(&sdkp->openers) == 1) && sdev->removable) {
1da177e4
LT		 1383 if (scsi_block_when_processing_errors(sdev))
1384 scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT);
1385 }
1386
1387 return 0;
1388
1389error_out:
1390 scsi_disk_put(sdkp);
1391 return retval;
1392}
1393
1394/**
1395 * sd_release - invoked when the (last) close(2) is called on this
1396 * scsi disk.
7529fbb0
DLM		 1397 * @disk: disk to release
1398 * @mode: FMODE_* mask
1da177e4
LT		 1399 *
1400 * Returns 0.
1401 *
1402 * Note: may block (uninterruptible) if error recovery is underway
1403 * on this disk.
409f3499
AB		 1404 *
1405 * Locking: called with bdev->bd_mutex held.
1da177e4 1406 **/
db2a144b 1407static void sd_release(struct gendisk *disk, fmode_t mode)
1da177e4 1408{
1da177e4
LT		 1409 struct scsi_disk *sdkp = scsi_disk(disk);
1410 struct scsi_device *sdev = sdkp->device;
1411
56937f7b 1412 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_release\n"));
1da177e4 1413
7e443312 1414 if (atomic_dec_return(&sdkp->openers) == 0 && sdev->removable) {
1da177e4
LT		 1415 if (scsi_block_when_processing_errors(sdev))
1416 scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW);
1417 }
1418
1da177e4 1419 scsi_disk_put(sdkp);
1da177e4
LT		 1420}
1421
a885c8c4 1422static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1da177e4
LT		 1423{
1424 struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk);
1425 struct scsi_device *sdp = sdkp->device;
1426 struct Scsi_Host *host = sdp->host;
f08bb1e0 1427 sector_t capacity = logical_to_sectors(sdp, sdkp->capacity);
1da177e4
LT		 1428 int diskinfo[4];
1429
1430 /* default to most commonly used values */
f08bb1e0
MP		 1431 diskinfo[0] = 0x40; /* 1 << 6 */
1432 diskinfo[1] = 0x20; /* 1 << 5 */
1433 diskinfo[2] = capacity >> 11;
1434
1da177e4
LT		 1435 /* override with calculated, extended default, or driver values */
1436 if (host->hostt->bios_param)
f08bb1e0 1437 host->hostt->bios_param(sdp, bdev, capacity, diskinfo);
1da177e4 1438 else
f08bb1e0 1439 scsicam_bios_param(bdev, capacity, diskinfo);
1da177e4 1440
a885c8c4
CH		 1441 geo->heads = diskinfo[0];
1442 geo->sectors = diskinfo[1];
1443 geo->cylinders = diskinfo[2];
1da177e4
LT		 1444 return 0;
1445}
1446
1447/**
1448 * sd_ioctl - process an ioctl
7529fbb0
DLM		 1449 * @bdev: target block device
1450 * @mode: FMODE_* mask
1da177e4
LT		 1451 * @cmd: ioctl command number
1452 * @arg: this is third argument given to ioctl(2) system call.
1453 * Often contains a pointer.
1454 *
25985edc 1455 * Returns 0 if successful (some ioctls return positive numbers on
1da177e4
LT		 1456 * success as well). Returns a negated errno value in case of error.
1457 *
1458 * Note: most ioctls are forward onto the block subsystem or further
3a4fa0a2 1459 * down in the scsi subsystem.
1da177e4 1460 **/
0338e291 1461static int sd_ioctl(struct block_device *bdev, fmode_t mode,
1da177e4
LT		 1462 unsigned int cmd, unsigned long arg)
1463{
1da177e4 1464 struct gendisk *disk = bdev->bd_disk;
fe2d1851
NN		 1465 struct scsi_disk *sdkp = scsi_disk(disk);
1466 struct scsi_device *sdp = sdkp->device;
1da177e4
LT		 1467 void __user *p = (void __user *)arg;
1468 int error;
1469
fe2d1851
NN		 1470 SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO, sdkp, "sd_ioctl: disk=%s, "
1471 "cmd=0x%x\n", disk->disk_name, cmd));
1da177e4 1472
0bfc96cb
PB		 1473 error = scsi_verify_blk_ioctl(bdev, cmd);
1474 if (error < 0)
1475 return error;
1476
1da177e4
LT		 1477 /*
1478 * If we are in the middle of error recovery, don't let anyone
1479 * else try and use this device. Also, if error recovery fails, it
1480 * may try and take the device offline, in which case all further
1481 * access to the device is prohibited.
1482 */
906d15fb
CH		 1483 error = scsi_ioctl_block_when_processing_errors(sdp, cmd,
1484 (mode & FMODE_NDELAY) != 0);
1485 if (error)
8a6cfeb6 1486 goto out;
1da177e4 1487
d80210f2
CH		 1488 if (is_sed_ioctl(cmd))
1489 return sed_ioctl(sdkp->opal_dev, cmd, p);
1490
1da177e4
LT		 1491 /*
1492 * Send SCSI addressing ioctls directly to mid level, send other
1493 * ioctls to block level and then onto mid level if they can't be
1494 * resolved.
1495 */
1496 switch (cmd) {
1497 case SCSI_IOCTL_GET_IDLUN:
1498 case SCSI_IOCTL_GET_BUS_NUMBER:
8a6cfeb6
AB		 1499 error = scsi_ioctl(sdp, cmd, p);
1500 break;
1da177e4 1501 default:
577ebb37 1502 error = scsi_cmd_blk_ioctl(bdev, mode, cmd, p);
1da177e4 1503 if (error != -ENOTTY)
8a6cfeb6
AB		 1504 break;
1505 error = scsi_ioctl(sdp, cmd, p);
1506 break;
1da177e4 1507 }
8a6cfeb6 1508out:
8a6cfeb6 1509 return error;
1da177e4
LT		 1510}
1511
1512static void set_media_not_present(struct scsi_disk *sdkp)
1513{
2bae0093
TH		 1514 if (sdkp->media_present)
1515 sdkp->device->changed = 1;
1516
1517 if (sdkp->device->removable) {
1518 sdkp->media_present = 0;
1519 sdkp->capacity = 0;
1520 }
1521}
1522
1523static int media_not_present(struct scsi_disk *sdkp,
1524 struct scsi_sense_hdr *sshdr)
1525{
1526 if (!scsi_sense_valid(sshdr))
1527 return 0;
1528
1529 /* not invoked for commands that could return deferred errors */
1530 switch (sshdr->sense_key) {
1531 case UNIT_ATTENTION:
1532 case NOT_READY:
1533 /* medium not present */
1534 if (sshdr->asc == 0x3A) {
1535 set_media_not_present(sdkp);
1536 return 1;
1537 }
1538 }
1539 return 0;
1da177e4
LT		 1540}
1541
1542/**
2bae0093
TH		 1543 * sd_check_events - check media events
1544 * @disk: kernel device descriptor
1545 * @clearing: disk events currently being cleared
1da177e4 1546 *
2bae0093 1547 * Returns mask of DISK_EVENT_*.
1da177e4
LT		 1548 *
1549 * Note: this function is invoked from the block subsystem.
1550 **/
2bae0093 1551static unsigned int sd_check_events(struct gendisk *disk, unsigned int clearing)
1da177e4 1552{
eb72d0bb
HR		 1553 struct scsi_disk *sdkp = scsi_disk_get(disk);
1554 struct scsi_device *sdp;
1da177e4
LT		 1555 int retval;
1556
eb72d0bb
HR		 1557 if (!sdkp)
1558 return 0;
1559
1560 sdp = sdkp->device;
2bae0093 1561 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_check_events\n"));
1da177e4
LT		 1562
1563 /*
1564 * If the device is offline, don't send any commands - just pretend as
1565 * if the command failed. If the device ever comes back online, we
1566 * can deal with it then. It is only because of unrecoverable errors
1567 * that we would ever take a device offline in the first place.
1568 */
285e9670
KS		 1569 if (!scsi_device_online(sdp)) {
1570 set_media_not_present(sdkp);
285e9670
KS		 1571 goto out;
1572 }
1da177e4
LT		 1573
1574 /*
1575 * Using TEST_UNIT_READY enables differentiation between drive with
1576 * no cartridge loaded - NOT READY, drive with changed cartridge -
1577 * UNIT ATTENTION, or with same cartridge - GOOD STATUS.
1578 *
1579 * Drives that auto spin down. eg iomega jaz 1G, will be started
1580 * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever
1581 * sd_revalidate() is called.
1582 */
001aac25 1583 if (scsi_block_when_processing_errors(sdp)) {
6fa2b8f9
CH		 1584 struct scsi_sense_hdr sshdr = { 0, };
1585
001aac25 1586 retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, SD_MAX_RETRIES,
6fa2b8f9 1587 &sshdr);
1da177e4 1588
6fa2b8f9
CH		 1589 /* failed to execute TUR, assume media not present */
1590 if (host_byte(retval)) {
1591 set_media_not_present(sdkp);
1592 goto out;
1593 }
1da177e4 1594
6fa2b8f9
CH		 1595 if (media_not_present(sdkp, &sshdr))
1596 goto out;
1597 }
2bae0093 1598
1da177e4
LT		 1599 /*
1600 * For removable scsi disk we have to recognise the presence
2bae0093 1601 * of a disk in the drive.
1da177e4 1602 */
2bae0093
TH		 1603 if (!sdkp->media_present)
1604 sdp->changed = 1;
1da177e4 1605 sdkp->media_present = 1;
285e9670 1606out:
3ff5588d 1607 /*
2bae0093 1608 * sdp->changed is set under the following conditions:
3ff5588d 1609 *
2bae0093
TH		 1610 * Medium present state has changed in either direction.
1611 * Device has indicated UNIT_ATTENTION.
3ff5588d 1612 */
2bae0093
TH		 1613 retval = sdp->changed ? DISK_EVENT_MEDIA_CHANGE : 0;
1614 sdp->changed = 0;
eb72d0bb 1615 scsi_disk_put(sdkp);
1da177e4 1616 return retval;
1da177e4
LT		 1617}
1618
4fa83244 1619static int sd_sync_cache(struct scsi_disk *sdkp, struct scsi_sense_hdr *sshdr)
1da177e4 1620{
1da177e4 1621 int retries, res;
e73aec82 1622 struct scsi_device *sdp = sdkp->device;
7e660100
JB		 1623 const int timeout = sdp->request_queue->rq_timeout
1624 * SD_FLUSH_TIMEOUT_MULTIPLIER;
4fa83244 1625 struct scsi_sense_hdr my_sshdr;
1da177e4
LT		 1626
1627 if (!scsi_device_online(sdp))
1628 return -ENODEV;
1629
4fa83244
DB		 1630 /* caller might not be interested in sense, but we need it */
1631 if (!sshdr)
1632 sshdr = &my_sshdr;
1633
1da177e4
LT		 1634 for (retries = 3; retries > 0; --retries) {
1635 unsigned char cmd[10] = { 0 };
1636
1637 cmd[0] = SYNCHRONIZE_CACHE;
1638 /*
1639 * Leave the rest of the command zero to indicate
1640 * flush everything.
1641 */
4fa83244 1642 res = scsi_execute(sdp, cmd, DMA_NONE, NULL, 0, NULL, sshdr,
fcbfffe2 1643 timeout, SD_MAX_RETRIES, 0, RQF_PM, NULL);
ea73a9f2 1644 if (res == 0)
1da177e4
LT		 1645 break;
1646 }
1647
e73aec82 1648 if (res) {
ef61329d 1649 sd_print_result(sdkp, "Synchronize Cache(10) failed", res);
95897910 1650
c65be1a6 1651 if (driver_byte(res) == DRIVER_SENSE)
4fa83244
DB		 1652 sd_print_sense_hdr(sdkp, sshdr);
1653
95897910 1654 /* we need to evaluate the error return */
4fa83244
DB		 1655 if (scsi_sense_valid(sshdr) &&
1656 (sshdr->asc == 0x3a || /* medium not present */
21e3d6c8
ON		 1657 sshdr->asc == 0x20 || /* invalid command */
1658 (sshdr->asc == 0x74 && sshdr->ascq == 0x71))) /* drive is password locked */
95897910
ON		 1659 /* this is no error here */
1660 return 0;
1661
1662 switch (host_byte(res)) {
1663 /* ignore errors due to racing a disconnection */
1664 case DID_BAD_TARGET:
1665 case DID_NO_CONNECT:
1666 return 0;
1667 /* signal the upper layer it might try again */
1668 case DID_BUS_BUSY:
1669 case DID_IMM_RETRY:
1670 case DID_REQUEUE:
1671 case DID_SOFT_ERROR:
1672 return -EBUSY;
1673 default:
1674 return -EIO;
1675 }
1da177e4 1676 }
3721050a 1677 return 0;
1da177e4
LT		 1678}
1679
1da177e4
LT		 1680static void sd_rescan(struct device *dev)
1681{
3d9a1f53 1682 struct scsi_disk *sdkp = dev_get_drvdata(dev);
39b7f1e2 1683
3d9a1f53 1684 revalidate_disk(sdkp->disk);
1da177e4
LT		 1685}
1686
1687
1688#ifdef CONFIG_COMPAT
1689/*
1690 * This gets directly called from VFS. When the ioctl
1691 * is not recognized we go back to the other translation paths.
1692 */
0338e291
AV		 1693static int sd_compat_ioctl(struct block_device *bdev, fmode_t mode,
1694 unsigned int cmd, unsigned long arg)
1da177e4 1695{
0338e291 1696 struct scsi_device *sdev = scsi_disk(bdev->bd_disk)->device;
21a9d4c9 1697 int error;
1da177e4 1698
21a9d4c9
CH		 1699 error = scsi_ioctl_block_when_processing_errors(sdev, cmd,
1700 (mode & FMODE_NDELAY) != 0);
1701 if (error)
1702 return error;
1da177e4 1703
1da177e4
LT		 1704 /*
1705 * Let the static ioctl translation table take care of it.
1706 */
21a9d4c9
CH		 1707 if (!sdev->host->hostt->compat_ioctl)
1708 return -ENOIOCTLCMD;
1709 return sdev->host->hostt->compat_ioctl(sdev, cmd, (void __user *)arg);
1da177e4
LT		 1710}
1711#endif
1712
924d55b0
CH		 1713static char sd_pr_type(enum pr_type type)
1714{
1715 switch (type) {
1716 case PR_WRITE_EXCLUSIVE:
1717 return 0x01;
1718 case PR_EXCLUSIVE_ACCESS:
1719 return 0x03;
1720 case PR_WRITE_EXCLUSIVE_REG_ONLY:
1721 return 0x05;
1722 case PR_EXCLUSIVE_ACCESS_REG_ONLY:
1723 return 0x06;
1724 case PR_WRITE_EXCLUSIVE_ALL_REGS:
1725 return 0x07;
1726 case PR_EXCLUSIVE_ACCESS_ALL_REGS:
1727 return 0x08;
1728 default:
1729 return 0;
1730 }
1731};
1732
1733static int sd_pr_command(struct block_device *bdev, u8 sa,
1734 u64 key, u64 sa_key, u8 type, u8 flags)
1735{
1736 struct scsi_device *sdev = scsi_disk(bdev->bd_disk)->device;
1737 struct scsi_sense_hdr sshdr;
1738 int result;
1739 u8 cmd[16] = { 0, };
1740 u8 data[24] = { 0, };
1741
1742 cmd[0] = PERSISTENT_RESERVE_OUT;
1743 cmd[1] = sa;
1744 cmd[2] = type;
1745 put_unaligned_be32(sizeof(data), &cmd[5]);
1746
1747 put_unaligned_be64(key, &data[0]);
1748 put_unaligned_be64(sa_key, &data[8]);
1749 data[20] = flags;
1750
1751 result = scsi_execute_req(sdev, cmd, DMA_TO_DEVICE, &data, sizeof(data),
1752 &sshdr, SD_TIMEOUT, SD_MAX_RETRIES, NULL);
1753
c65be1a6
JT		 1754 if (driver_byte(result) == DRIVER_SENSE &&
1755 scsi_sense_valid(&sshdr)) {
924d55b0
CH		 1756 sdev_printk(KERN_INFO, sdev, "PR command failed: %d\n", result);
1757 scsi_print_sense_hdr(sdev, NULL, &sshdr);
1758 }
1759
1760 return result;
1761}
1762
1763static int sd_pr_register(struct block_device *bdev, u64 old_key, u64 new_key,
1764 u32 flags)
1765{
1766 if (flags & ~PR_FL_IGNORE_KEY)
1767 return -EOPNOTSUPP;
1768 return sd_pr_command(bdev, (flags & PR_FL_IGNORE_KEY) ? 0x06 : 0x00,
1769 old_key, new_key, 0,
01f90dd9 1770 (1 << 0) /* APTPL */);
924d55b0
CH		 1771}
1772
1773static int sd_pr_reserve(struct block_device *bdev, u64 key, enum pr_type type,
1774 u32 flags)
1775{
1776 if (flags)
1777 return -EOPNOTSUPP;
1778 return sd_pr_command(bdev, 0x01, key, 0, sd_pr_type(type), 0);
1779}
1780
1781static int sd_pr_release(struct block_device *bdev, u64 key, enum pr_type type)
1782{
1783 return sd_pr_command(bdev, 0x02, key, 0, sd_pr_type(type), 0);
1784}
1785
1786static int sd_pr_preempt(struct block_device *bdev, u64 old_key, u64 new_key,
1787 enum pr_type type, bool abort)
1788{
1789 return sd_pr_command(bdev, abort ? 0x05 : 0x04, old_key, new_key,
1790 sd_pr_type(type), 0);
1791}
1792
1793static int sd_pr_clear(struct block_device *bdev, u64 key)
1794{
1795 return sd_pr_command(bdev, 0x03, key, 0, 0, 0);
1796}
1797
1798static const struct pr_ops sd_pr_ops = {
1799 .pr_register = sd_pr_register,
1800 .pr_reserve = sd_pr_reserve,
1801 .pr_release = sd_pr_release,
1802 .pr_preempt = sd_pr_preempt,
1803 .pr_clear = sd_pr_clear,
1804};
1805
83d5cde4 1806static const struct block_device_operations sd_fops = {
1da177e4 1807 .owner = THIS_MODULE,
0338e291
AV		 1808 .open = sd_open,
1809 .release = sd_release,
8a6cfeb6 1810 .ioctl = sd_ioctl,
a885c8c4 1811 .getgeo = sd_getgeo,
1da177e4 1812#ifdef CONFIG_COMPAT
0338e291 1813 .compat_ioctl = sd_compat_ioctl,
1da177e4 1814#endif
2bae0093 1815 .check_events = sd_check_events,
1da177e4 1816 .revalidate_disk = sd_revalidate_disk,
72ec24bd 1817 .unlock_native_capacity = sd_unlock_native_capacity,
e76239a3 1818 .report_zones = sd_zbc_report_zones,
924d55b0 1819 .pr_ops = &sd_pr_ops,
1da177e4
LT		 1820};
1821
7a38dc0b
HR		 1822/**
1823 * sd_eh_reset - reset error handling callback
1824 * @scmd: sd-issued command that has failed
1825 *
1826 * This function is called by the SCSI midlayer before starting
1827 * SCSI EH. When counting medium access failures we have to be
1828 * careful to register it only only once per device and SCSI EH run;
1829 * there might be several timed out commands which will cause the
1830 * 'max_medium_access_timeouts' counter to trigger after the first
1831 * SCSI EH run already and set the device to offline.
1832 * So this function resets the internal counter before starting SCSI EH.
1833 **/
1834static void sd_eh_reset(struct scsi_cmnd *scmd)
1835{
1836 struct scsi_disk *sdkp = scsi_disk(scmd->request->rq_disk);
1837
1838 /* New SCSI EH run, reset gate variable */
1839 sdkp->ignore_medium_access_errors = false;
1840}
1841
18a4d0a2
MP		 1842/**
1843 * sd_eh_action - error handling callback
1844 * @scmd: sd-issued command that has failed
18a4d0a2
MP		 1845 * @eh_disp: The recovery disposition suggested by the midlayer
1846 *
2451079b
JB		 1847 * This function is called by the SCSI midlayer upon completion of an
1848 * error test command (currently TEST UNIT READY). The result of sending
1849 * the eh command is passed in eh_disp. We're looking for devices that
1850 * fail medium access commands but are OK with non access commands like
1851 * test unit ready (so wrongly see the device as having a successful
1852 * recovery)
18a4d0a2 1853 **/
2451079b 1854static int sd_eh_action(struct scsi_cmnd *scmd, int eh_disp)
18a4d0a2
MP		 1855{
1856 struct scsi_disk *sdkp = scsi_disk(scmd->request->rq_disk);
0db6ca8a 1857 struct scsi_device *sdev = scmd->device;
18a4d0a2 1858
0db6ca8a 1859 if (!scsi_device_online(sdev) ||
2451079b
JB		 1860 !scsi_medium_access_command(scmd) ||
1861 host_byte(scmd->result) != DID_TIME_OUT ||
1862 eh_disp != SUCCESS)
18a4d0a2
MP		 1863 return eh_disp;
1864
1865 /*
1866 * The device has timed out executing a medium access command.
1867 * However, the TEST UNIT READY command sent during error
1868 * handling completed successfully. Either the device is in the
1869 * process of recovering or has it suffered an internal failure
1870 * that prevents access to the storage medium.
1871 */
7a38dc0b
HR		 1872 if (!sdkp->ignore_medium_access_errors) {
1873 sdkp->medium_access_timed_out++;
1874 sdkp->ignore_medium_access_errors = true;
1875 }
18a4d0a2
MP		 1876
1877 /*
1878 * If the device keeps failing read/write commands but TEST UNIT
1879 * READY always completes successfully we assume that medium
1880 * access is no longer possible and take the device offline.
1881 */
1882 if (sdkp->medium_access_timed_out >= sdkp->max_medium_access_timeouts) {
1883 scmd_printk(KERN_ERR, scmd,
1884 "Medium access timeout failure. Offlining disk!\n");
0db6ca8a
BVA		 1885 mutex_lock(&sdev->state_mutex);
1886 scsi_device_set_state(sdev, SDEV_OFFLINE);
1887 mutex_unlock(&sdev->state_mutex);
18a4d0a2 1888
e8f8d50e 1889 return SUCCESS;
18a4d0a2
MP		 1890 }
1891
1892 return eh_disp;
1893}
1894
af55ff67
MP		 1895static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd)
1896{
6eadc612
DLM		 1897 struct request *req = scmd->request;
1898 struct scsi_device *sdev = scmd->device;
1899 unsigned int transferred, good_bytes;
1900 u64 start_lba, end_lba, bad_lba;
1901
a8733c7b 1902 /*
6eadc612
DLM		 1903 * Some commands have a payload smaller than the device logical
1904 * block size (e.g. INQUIRY on a 4K disk).
a8733c7b 1905 */
6eadc612 1906 if (scsi_bufflen(scmd) <= sdev->sector_size)
af55ff67
MP		 1907 return 0;
1908
6eadc612
DLM		 1909 /* Check if we have a 'bad_lba' information */
1910 if (!scsi_get_sense_info_fld(scmd->sense_buffer,
1911 SCSI_SENSE_BUFFERSIZE,
1912 &bad_lba))
af55ff67
MP		 1913 return 0;
1914
6eadc612
DLM		 1915 /*
1916 * If the bad lba was reported incorrectly, we have no idea where
af55ff67
MP		 1917 * the error is.
1918 */
6eadc612
DLM		 1919 start_lba = sectors_to_logical(sdev, blk_rq_pos(req));
1920 end_lba = start_lba + bytes_to_logical(sdev, scsi_bufflen(scmd));
1921 if (bad_lba < start_lba || bad_lba >= end_lba)
af55ff67
MP		 1922 return 0;
1923
6eadc612
DLM		 1924 /*
1925 * resid is optional but mostly filled in. When it's unused,
1926 * its value is zero, so we assume the whole buffer transferred
af55ff67 1927 */
6eadc612
DLM		 1928 transferred = scsi_bufflen(scmd) - scsi_get_resid(scmd);
1929
1930 /* This computation should always be done in terms of the
1931 * resolution of the device's medium.
af55ff67 1932 */
6eadc612
DLM		 1933 good_bytes = logical_to_bytes(sdev, bad_lba - start_lba);
1934
a8733c7b 1935 return min(good_bytes, transferred);
af55ff67
MP		 1936}
1937
1da177e4 1938/**
7b3d9545 1939 * sd_done - bottom half handler: called when the lower level
1da177e4
LT		 1940 * driver has completed (successfully or otherwise) a scsi command.
1941 * @SCpnt: mid-level's per command structure.
1942 *
1943 * Note: potentially run from within an ISR. Must not block.
1944 **/
7b3d9545 1945static int sd_done(struct scsi_cmnd *SCpnt)
1da177e4
LT		 1946{
1947 int result = SCpnt->result;
af55ff67 1948 unsigned int good_bytes = result ? 0 : scsi_bufflen(SCpnt);
c46f0917
DLM		 1949 unsigned int sector_size = SCpnt->device->sector_size;
1950 unsigned int resid;
1da177e4 1951 struct scsi_sense_hdr sshdr;
4e7392ec 1952 struct scsi_disk *sdkp = scsi_disk(SCpnt->request->rq_disk);
26e85fcd 1953 struct request *req = SCpnt->request;
1da177e4
LT		 1954 int sense_valid = 0;
1955 int sense_deferred = 0;
1da177e4 1956
89d94756
HR		 1957 switch (req_op(req)) {
1958 case REQ_OP_DISCARD:
02d26103 1959 case REQ_OP_WRITE_ZEROES:
89d94756
HR		 1960 case REQ_OP_WRITE_SAME:
1961 case REQ_OP_ZONE_RESET:
d81e9d49 1962 case REQ_OP_ZONE_RESET_ALL:
26e85fcd
MP		 1963 if (!result) {
1964 good_bytes = blk_rq_bytes(req);
1965 scsi_set_resid(SCpnt, 0);
1966 } else {
1967 good_bytes = 0;
1968 scsi_set_resid(SCpnt, blk_rq_bytes(req));
89d94756
HR		 1969 }
1970 break;
c46f0917
DLM		 1971 default:
1972 /*
1973 * In case of bogus fw or device, we could end up having
1974 * an unaligned partial completion. Check this here and force
1975 * alignment.
1976 */
1977 resid = scsi_get_resid(SCpnt);
1978 if (resid & (sector_size - 1)) {
1979 sd_printk(KERN_INFO, sdkp,
1980 "Unaligned partial completion (resid=%u, sector_sz=%u)\n",
1981 resid, sector_size);
670d8be2 1982 scsi_print_command(SCpnt);
c46f0917
DLM		 1983 resid = min(scsi_bufflen(SCpnt),
1984 round_up(resid, sector_size));
1985 scsi_set_resid(SCpnt, resid);
1986 }
26e85fcd 1987 }
6a32a8ae 1988
1da177e4
LT		 1989 if (result) {
1990 sense_valid = scsi_command_normalize_sense(SCpnt, &sshdr);
1991 if (sense_valid)
1992 sense_deferred = scsi_sense_is_deferred(&sshdr);
1993 }
2a863ba8
DJ		 1994 sdkp->medium_access_timed_out = 0;
1995
03aba2f7
LT		 1996 if (driver_byte(result) != DRIVER_SENSE &&
1997 (!sense_valid || sense_deferred))
1998 goto out;
1999
2000 switch (sshdr.sense_key) {
2001 case HARDWARE_ERROR:
2002 case MEDIUM_ERROR:
af55ff67 2003 good_bytes = sd_completed_bytes(SCpnt);
03aba2f7
LT		 2004 break;
2005 case RECOVERED_ERROR:
af55ff67
MP		 2006 good_bytes = scsi_bufflen(SCpnt);
2007 break;
10dab226
JW		 2008 case NO_SENSE:
2009 /* This indicates a false check condition, so ignore it. An
2010 * unknown amount of data was transferred so treat it as an
2011 * error.
2012 */
10dab226
JW		 2013 SCpnt->result = 0;
2014 memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
2015 break;
c98a0eb0
MP		 2016 case ABORTED_COMMAND:
2017 if (sshdr.asc == 0x10) /* DIF: Target detected corruption */
2018 good_bytes = sd_completed_bytes(SCpnt);
2019 break;
2020 case ILLEGAL_REQUEST:
d227ec26
CH		 2021 switch (sshdr.asc) {
2022 case 0x10: /* DIX: Host detected corruption */
af55ff67 2023 good_bytes = sd_completed_bytes(SCpnt);
d227ec26
CH		 2024 break;
2025 case 0x20: /* INVALID COMMAND OPCODE */
2026 case 0x24: /* INVALID FIELD IN CDB */
2027 switch (SCpnt->cmnd[0]) {
5db44863
MP		 2028 case UNMAP:
2029 sd_config_discard(sdkp, SD_LBP_DISABLE);
2030 break;
2031 case WRITE_SAME_16:
2032 case WRITE_SAME:
d227ec26 2033 if (SCpnt->cmnd[1] & 8) { /* UNMAP */
5db44863 2034 sd_config_discard(sdkp, SD_LBP_DISABLE);
d227ec26 2035 } else {
5db44863
MP		 2036 sdkp->device->no_write_same = 1;
2037 sd_config_write_same(sdkp);
e8064021 2038 req->rq_flags |= RQF_QUIET;
5db44863 2039 }
d227ec26 2040 break;
5db44863
MP		 2041 }
2042 }
03aba2f7
LT		 2043 break;
2044 default:
2045 break;
1da177e4 2046 }
89d94756 2047
03aba2f7 2048 out:
89d94756
HR		 2049 if (sd_is_zoned(sdkp))
2050 sd_zbc_complete(SCpnt, good_bytes, &sshdr);
2051
ef61329d
HR		 2052 SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO, SCpnt,
2053 "sd_done: completed %d of %d bytes\n",
2054 good_bytes, scsi_bufflen(SCpnt)));
2055
7b3d9545 2056 return good_bytes;
1da177e4
LT		 2057}
2058
1da177e4
LT		 2059/*
2060 * spinup disk - called only in sd_revalidate_disk()
2061 */
2062static void
e73aec82 2063sd_spinup_disk(struct scsi_disk *sdkp)
ea73a9f2 2064{
1da177e4 2065 unsigned char cmd[10];
4451e472 2066 unsigned long spintime_expire = 0;
1da177e4
LT		 2067 int retries, spintime;
2068 unsigned int the_result;
2069 struct scsi_sense_hdr sshdr;
2070 int sense_valid = 0;
2071
2072 spintime = 0;
2073
2074 /* Spin up drives, as required. Only do this at boot time */
2075 /* Spinup needs to be done for module loads too. */
2076 do {
2077 retries = 0;
2078
2079 do {
2080 cmd[0] = TEST_UNIT_READY;
2081 memset((void *) &cmd[1], 0, 9);
2082
ea73a9f2
JB		 2083 the_result = scsi_execute_req(sdkp->device, cmd,
2084 DMA_NONE, NULL, 0,
2085 &sshdr, SD_TIMEOUT,
f4f4e47e 2086 SD_MAX_RETRIES, NULL);
1da177e4 2087
b4d38e38
AS		 2088 /*
2089 * If the drive has indicated to us that it
2090 * doesn't have any media in it, don't bother
2091 * with any more polling.
2092 */
2093 if (media_not_present(sdkp, &sshdr))
2094 return;
2095
1da177e4 2096 if (the_result)
ea73a9f2 2097 sense_valid = scsi_sense_valid(&sshdr);
1da177e4
LT		 2098 retries++;
2099 } while (retries < 3 &&
2100 (!scsi_status_is_good(the_result) ||
c65be1a6 2101 ((driver_byte(the_result) == DRIVER_SENSE) &&
1da177e4
LT		 2102 sense_valid && sshdr.sense_key == UNIT_ATTENTION)));
2103
c65be1a6 2104 if (driver_byte(the_result) != DRIVER_SENSE) {
1da177e4
LT		 2105 /* no sense, TUR either succeeded or failed
2106 * with a status error */
e73aec82 2107 if(!spintime && !scsi_status_is_good(the_result)) {
ef61329d
HR		 2108 sd_print_result(sdkp, "Test Unit Ready failed",
2109 the_result);
e73aec82 2110 }
1da177e4
LT		 2111 break;
2112 }
ef61329d 2113
1da177e4
LT		 2114 /*
2115 * The device does not want the automatic start to be issued.
2116 */
33dd6f92 2117 if (sdkp->device->no_start_on_add)
1da177e4 2118 break;
1da177e4 2119
33dd6f92
MW		 2120 if (sense_valid && sshdr.sense_key == NOT_READY) {
2121 if (sshdr.asc == 4 && sshdr.ascq == 3)
2122 break; /* manual intervention required */
2123 if (sshdr.asc == 4 && sshdr.ascq == 0xb)
2124 break; /* standby */
2125 if (sshdr.asc == 4 && sshdr.ascq == 0xc)
2126 break; /* unavailable */
505aa4b6
MR		 2127 if (sshdr.asc == 4 && sshdr.ascq == 0x1b)
2128 break; /* sanitize in progress */
33dd6f92
MW		 2129 /*
2130 * Issue command to spin up drive when not ready
2131 */
1da177e4 2132 if (!spintime) {
e73aec82 2133 sd_printk(KERN_NOTICE, sdkp, "Spinning up disk...");
1da177e4
LT		 2134 cmd[0] = START_STOP;
2135 cmd[1] = 1; /* Return immediately */
2136 memset((void *) &cmd[2], 0, 8);
2137 cmd[4] = 1; /* Start spin cycle */
d2886ea3
SR		 2138 if (sdkp->device->start_stop_pwr_cond)
2139 cmd[4] |= 1 << 4;
ea73a9f2
JB		 2140 scsi_execute_req(sdkp->device, cmd, DMA_NONE,
2141 NULL, 0, &sshdr,
f4f4e47e
FT		 2142 SD_TIMEOUT, SD_MAX_RETRIES,
2143 NULL);
4451e472
AS		 2144 spintime_expire = jiffies + 100 * HZ;
2145 spintime = 1;
1da177e4 2146 }
1da177e4
LT		 2147 /* Wait 1 second for next try */
2148 msleep(1000);
3a1d0783 2149 printk(KERN_CONT ".");
4451e472
AS		 2150
2151 /*
2152 * Wait for USB flash devices with slow firmware.
2153 * Yes, this sense key/ASC combination shouldn't
2154 * occur here. It's characteristic of these devices.
2155 */
2156 } else if (sense_valid &&
2157 sshdr.sense_key == UNIT_ATTENTION &&
2158 sshdr.asc == 0x28) {
2159 if (!spintime) {
2160 spintime_expire = jiffies + 5 * HZ;
2161 spintime = 1;
2162 }
2163 /* Wait 1 second for next try */
2164 msleep(1000);
1da177e4
LT		 2165 } else {
2166 /* we don't understand the sense code, so it's
2167 * probably pointless to loop */
2168 if(!spintime) {
e73aec82
MP		 2169 sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n");
2170 sd_print_sense_hdr(sdkp, &sshdr);
1da177e4
LT		 2171 }
2172 break;
2173 }
2174
4451e472 2175 } while (spintime && time_before_eq(jiffies, spintime_expire));
1da177e4
LT		 2176
2177 if (spintime) {
2178 if (scsi_status_is_good(the_result))
3a1d0783 2179 printk(KERN_CONT "ready\n");
1da177e4 2180 else
3a1d0783 2181 printk(KERN_CONT "not responding...\n");
1da177e4
LT		 2182 }
2183}
2184
e0597d70
MP		 2185/*
2186 * Determine whether disk supports Data Integrity Field.
2187 */
fe542396 2188static int sd_read_protection_type(struct scsi_disk *sdkp, unsigned char *buffer)
e0597d70
MP		 2189{
2190 struct scsi_device *sdp = sdkp->device;
2191 u8 type;
fe542396 2192 int ret = 0;
e0597d70
MP		 2193
2194 if (scsi_device_protection(sdp) == 0 || (buffer[12] & 1) == 0)
fe542396 2195 return ret;
35e1a5d9
MP		 2196
2197 type = ((buffer[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */
2198
8475c811 2199 if (type > T10_PI_TYPE3_PROTECTION)
fe542396
MP		 2200 ret = -ENODEV;
2201 else if (scsi_host_dif_capable(sdp->host, type))
2202 ret = 1;
2203
2204 if (sdkp->first_scan || type != sdkp->protection_type)
2205 switch (ret) {
2206 case -ENODEV:
2207 sd_printk(KERN_ERR, sdkp, "formatted with unsupported" \
2208 " protection type %u. Disabling disk!\n",
2209 type);
2210 break;
2211 case 1:
2212 sd_printk(KERN_NOTICE, sdkp,
2213 "Enabling DIF Type %u protection\n", type);
2214 break;
2215 case 0:
2216 sd_printk(KERN_NOTICE, sdkp,
2217 "Disabling DIF Type %u protection\n", type);
2218 break;
2219 }
e0597d70 2220
be922f47
MP		 2221 sdkp->protection_type = type;
2222
fe542396 2223 return ret;
e0597d70
MP		 2224}
2225
0da205e0
MW		 2226static void read_capacity_error(struct scsi_disk *sdkp, struct scsi_device *sdp,
2227 struct scsi_sense_hdr *sshdr, int sense_valid,
2228 int the_result)
2229{
c65be1a6 2230 if (driver_byte(the_result) == DRIVER_SENSE)
0da205e0
MW		 2231 sd_print_sense_hdr(sdkp, sshdr);
2232 else
2233 sd_printk(KERN_NOTICE, sdkp, "Sense not available.\n");
2234
2235 /*
2236 * Set dirty bit for removable devices if not ready -
2237 * sometimes drives will not report this properly.
2238 */
2239 if (sdp->removable &&
2240 sense_valid && sshdr->sense_key == NOT_READY)
2bae0093 2241 set_media_not_present(sdkp);
0da205e0
MW		 2242
2243 /*
2244 * We used to set media_present to 0 here to indicate no media
2245 * in the drive, but some drives fail read capacity even with
2246 * media present, so we can't do that.
2247 */
2248 sdkp->capacity = 0; /* unknown mapped to zero - as usual */
2249}
2250
2251#define RC16_LEN 32
2252#if RC16_LEN > SD_BUF_SIZE
2253#error RC16_LEN must not be more than SD_BUF_SIZE
2254#endif
2255
3233ac19
JB		 2256#define READ_CAPACITY_RETRIES_ON_RESET 10
2257
0da205e0
MW		 2258static int read_capacity_16(struct scsi_disk *sdkp, struct scsi_device *sdp,
2259 unsigned char *buffer)
ea73a9f2 2260{
1da177e4 2261 unsigned char cmd[16];
1da177e4
LT		 2262 struct scsi_sense_hdr sshdr;
2263 int sense_valid = 0;
0da205e0 2264 int the_result;
3233ac19 2265 int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET;
ea09bcc9 2266 unsigned int alignment;
0da205e0
MW		 2267 unsigned long long lba;
2268 unsigned sector_size;
1da177e4 2269
5ce524bd
HG		 2270 if (sdp->no_read_capacity_16)
2271 return -EINVAL;
2272
1da177e4 2273 do {
0da205e0 2274 memset(cmd, 0, 16);
eb846d9f 2275 cmd[0] = SERVICE_ACTION_IN_16;
0da205e0
MW		 2276 cmd[1] = SAI_READ_CAPACITY_16;
2277 cmd[13] = RC16_LEN;
2278 memset(buffer, 0, RC16_LEN);
2279
ea73a9f2 2280 the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE,
0da205e0
MW		 2281 buffer, RC16_LEN, &sshdr,
2282 SD_TIMEOUT, SD_MAX_RETRIES, NULL);
1da177e4 2283
ea73a9f2 2284 if (media_not_present(sdkp, &sshdr))
0da205e0 2285 return -ENODEV;
1da177e4 2286
2b301307 2287 if (the_result) {
ea73a9f2 2288 sense_valid = scsi_sense_valid(&sshdr);
2b301307
MW		 2289 if (sense_valid &&
2290 sshdr.sense_key == ILLEGAL_REQUEST &&
2291 (sshdr.asc == 0x20 || sshdr.asc == 0x24) &&
2292 sshdr.ascq == 0x00)
2293 /* Invalid Command Operation Code or
2294 * Invalid Field in CDB, just retry
2295 * silently with RC10 */
2296 return -EINVAL;
3233ac19
JB		 2297 if (sense_valid &&
2298 sshdr.sense_key == UNIT_ATTENTION &&
2299 sshdr.asc == 0x29 && sshdr.ascq == 0x00)
2300 /* Device reset might occur several times,
2301 * give it one more chance */
2302 if (--reset_retries > 0)
2303 continue;
2b301307 2304 }
1da177e4
LT		 2305 retries--;
2306
2307 } while (the_result && retries);
2308
0da205e0 2309 if (the_result) {
ef61329d 2310 sd_print_result(sdkp, "Read Capacity(16) failed", the_result);
0da205e0
MW		 2311 read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result);
2312 return -EINVAL;
2313 }
e73aec82 2314
8f76d151
DH		 2315 sector_size = get_unaligned_be32(&buffer[8]);
2316 lba = get_unaligned_be64(&buffer[0]);
0da205e0 2317
fe542396
MP		 2318 if (sd_read_protection_type(sdkp, buffer) < 0) {
2319 sdkp->capacity = 0;
2320 return -ENODEV;
2321 }
0da205e0 2322
ea09bcc9 2323 /* Logical blocks per physical block exponent */
526f7c79 2324 sdkp->physical_block_size = (1 << (buffer[13] & 0xf)) * sector_size;
ea09bcc9 2325
89d94756
HR		 2326 /* RC basis */
2327 sdkp->rc_basis = (buffer[12] >> 4) & 0x3;
2328
ea09bcc9
MP		 2329 /* Lowest aligned logical block */
2330 alignment = ((buffer[14] & 0x3f) << 8 | buffer[15]) * sector_size;
2331 blk_queue_alignment_offset(sdp->request_queue, alignment);
2332 if (alignment && sdkp->first_scan)
2333 sd_printk(KERN_NOTICE, sdkp,
2334 "physical block alignment offset: %u\n", alignment);
2335
c98a0eb0
MP		 2336 if (buffer[14] & 0x80) { /* LBPME */
2337 sdkp->lbpme = 1;
e339c1a7 2338
c98a0eb0
MP		 2339 if (buffer[14] & 0x40) /* LBPRZ */
2340 sdkp->lbprz = 1;
e339c1a7 2341
c98a0eb0 2342 sd_config_discard(sdkp, SD_LBP_WS16);
e339c1a7
MP		 2343 }
2344
0da205e0
MW		 2345 sdkp->capacity = lba + 1;
2346 return sector_size;
2347}
2348
2349static int read_capacity_10(struct scsi_disk *sdkp, struct scsi_device *sdp,
2350 unsigned char *buffer)
2351{
2352 unsigned char cmd[16];
2353 struct scsi_sense_hdr sshdr;
2354 int sense_valid = 0;
2355 int the_result;
3233ac19 2356 int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET;
0da205e0
MW		 2357 sector_t lba;
2358 unsigned sector_size;
2359
2360 do {
2361 cmd[0] = READ_CAPACITY;
2362 memset(&cmd[1], 0, 9);
2363 memset(buffer, 0, 8);
2364
2365 the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE,
2366 buffer, 8, &sshdr,
2367 SD_TIMEOUT, SD_MAX_RETRIES, NULL);
2368
2369 if (media_not_present(sdkp, &sshdr))
2370 return -ENODEV;
2371
3233ac19 2372 if (the_result) {
0da205e0 2373 sense_valid = scsi_sense_valid(&sshdr);
3233ac19
JB		 2374 if (sense_valid &&
2375 sshdr.sense_key == UNIT_ATTENTION &&
2376 sshdr.asc == 0x29 && sshdr.ascq == 0x00)
2377 /* Device reset might occur several times,
2378 * give it one more chance */
2379 if (--reset_retries > 0)
2380 continue;
2381 }
0da205e0
MW		 2382 retries--;
2383
2384 } while (the_result && retries);
2385
2386 if (the_result) {
ef61329d 2387 sd_print_result(sdkp, "Read Capacity(10) failed", the_result);
0da205e0
MW		 2388 read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result);
2389 return -EINVAL;
2390 }
2391
8f76d151
DH		 2392 sector_size = get_unaligned_be32(&buffer[4]);
2393 lba = get_unaligned_be32(&buffer[0]);
0da205e0 2394
5ce524bd
HG		 2395 if (sdp->no_read_capacity_16 && (lba == 0xffffffff)) {
2396 /* Some buggy (usb cardreader) devices return an lba of
2397 0xffffffff when the want to report a size of 0 (with
2398 which they really mean no media is present) */
2399 sdkp->capacity = 0;
5cc10350 2400 sdkp->physical_block_size = sector_size;
5ce524bd
HG		 2401 return sector_size;
2402 }
2403
0da205e0 2404 sdkp->capacity = lba + 1;
526f7c79 2405 sdkp->physical_block_size = sector_size;
0da205e0
MW		 2406 return sector_size;
2407}
2408
2b301307
MW		 2409static int sd_try_rc16_first(struct scsi_device *sdp)
2410{
f87146bb
HR		 2411 if (sdp->host->max_cmd_len < 16)
2412 return 0;
6a0bdffa
AS		 2413 if (sdp->try_rc_10_first)
2414 return 0;
2b301307
MW		 2415 if (sdp->scsi_level > SCSI_SPC_2)
2416 return 1;
2417 if (scsi_device_protection(sdp))
2418 return 1;
2419 return 0;
2420}
2421
0da205e0
MW		 2422/*
2423 * read disk capacity
2424 */
2425static void
2426sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer)
2427{
2428 int sector_size;
2429 struct scsi_device *sdp = sdkp->device;
2430
2b301307 2431 if (sd_try_rc16_first(sdp)) {
0da205e0
MW		 2432 sector_size = read_capacity_16(sdkp, sdp, buffer);
2433 if (sector_size == -EOVERFLOW)
1da177e4 2434 goto got_data;
2b301307
MW		 2435 if (sector_size == -ENODEV)
2436 return;
2437 if (sector_size < 0)
2438 sector_size = read_capacity_10(sdkp, sdp, buffer);
0da205e0
MW		 2439 if (sector_size < 0)
2440 return;
1da177e4 2441 } else {
0da205e0
MW		 2442 sector_size = read_capacity_10(sdkp, sdp, buffer);
2443 if (sector_size == -EOVERFLOW)
2444 goto got_data;
2445 if (sector_size < 0)
2446 return;
2447 if ((sizeof(sdkp->capacity) > 4) &&
2448 (sdkp->capacity > 0xffffffffULL)) {
2449 int old_sector_size = sector_size;
2450 sd_printk(KERN_NOTICE, sdkp, "Very big device. "
2451 "Trying to use READ CAPACITY(16).\n");
2452 sector_size = read_capacity_16(sdkp, sdp, buffer);
2453 if (sector_size < 0) {
2454 sd_printk(KERN_NOTICE, sdkp,
2455 "Using 0xffffffff as device size\n");
2456 sdkp->capacity = 1 + (sector_t) 0xffffffff;
2457 sector_size = old_sector_size;
2458 goto got_data;
2459 }
597d7400
MP		 2460 /* Remember that READ CAPACITY(16) succeeded */
2461 sdp->try_rc_10_first = 0;
0da205e0
MW		 2462 }
2463 }
1da177e4 2464
5c211caa
AS		 2465 /* Some devices are known to return the total number of blocks,
2466 * not the highest block number. Some devices have versions
2467 * which do this and others which do not. Some devices we might
2468 * suspect of doing this but we don't know for certain.
2469 *
2470 * If we know the reported capacity is wrong, decrement it. If
2471 * we can only guess, then assume the number of blocks is even
2472 * (usually true but not always) and err on the side of lowering
2473 * the capacity.
2474 */
2475 if (sdp->fix_capacity ||
2476 (sdp->guess_capacity && (sdkp->capacity & 0x01))) {
2477 sd_printk(KERN_INFO, sdkp, "Adjusting the sector count "
2478 "from its reported value: %llu\n",
2479 (unsigned long long) sdkp->capacity);
1da177e4 2480 --sdkp->capacity;
61bf54b7
ON		 2481 }
2482
1da177e4
LT		 2483got_data:
2484 if (sector_size == 0) {
2485 sector_size = 512;
e73aec82
MP		 2486 sd_printk(KERN_NOTICE, sdkp, "Sector size 0 reported, "
2487 "assuming 512.\n");
1da177e4
LT		 2488 }
2489
2490 if (sector_size != 512 &&
2491 sector_size != 1024 &&
2492 sector_size != 2048 &&
74856fbf 2493 sector_size != 4096) {
e73aec82
MP		 2494 sd_printk(KERN_NOTICE, sdkp, "Unsupported sector size %d.\n",
2495 sector_size);
1da177e4
LT		 2496 /*
2497 * The user might want to re-format the drive with
2498 * a supported sectorsize. Once this happens, it
2499 * would be relatively trivial to set the thing up.
2500 * For this reason, we leave the thing in the table.
2501 */
2502 sdkp->capacity = 0;
2503 /*
2504 * set a bogus sector size so the normal read/write
2505 * logic in the block layer will eventually refuse any
2506 * request on this device without tripping over power
2507 * of two sector size assumptions
2508 */
2509 sector_size = 512;
2510 }
e1defc4f 2511 blk_queue_logical_block_size(sdp->request_queue, sector_size);
89d94756
HR		 2512 blk_queue_physical_block_size(sdp->request_queue,
2513 sdkp->physical_block_size);
2514 sdkp->device->sector_size = sector_size;
7404ad3b 2515
89d94756
HR		 2516 if (sdkp->capacity > 0xffffffff)
2517 sdp->use_16_for_rw = 1;
1da177e4 2518
89d94756 2519}
1da177e4 2520
89d94756
HR		 2521/*
2522 * Print disk capacity
2523 */
2524static void
2525sd_print_capacity(struct scsi_disk *sdkp,
2526 sector_t old_capacity)
2527{
2528 int sector_size = sdkp->device->sector_size;
2529 char cap_str_2[10], cap_str_10[10];
ea09bcc9 2530
d7e6db20
DLM		 2531 if (!sdkp->first_scan && old_capacity == sdkp->capacity)
2532 return;
2533
89d94756
HR		 2534 string_get_size(sdkp->capacity, sector_size,
2535 STRING_UNITS_2, cap_str_2, sizeof(cap_str_2));
2536 string_get_size(sdkp->capacity, sector_size,
d7e6db20 2537 STRING_UNITS_10, cap_str_10, sizeof(cap_str_10));
1da177e4 2538
d7e6db20
DLM		 2539 sd_printk(KERN_NOTICE, sdkp,
2540 "%llu %d-byte logical blocks: (%s/%s)\n",
2541 (unsigned long long)sdkp->capacity,
2542 sector_size, cap_str_10, cap_str_2);
53ad570b 2543
d7e6db20
DLM		 2544 if (sdkp->physical_block_size != sector_size)
2545 sd_printk(KERN_NOTICE, sdkp,
2546 "%u-byte physical blocks\n",
2547 sdkp->physical_block_size);
89d94756 2548
d7e6db20 2549 sd_zbc_print_zones(sdkp);
1da177e4
LT		 2550}
2551
2552/* called with buffer of length 512 */
2553static inline int
ea73a9f2
JB		 2554sd_do_mode_sense(struct scsi_device *sdp, int dbd, int modepage,
2555 unsigned char *buffer, int len, struct scsi_mode_data *data,
2556 struct scsi_sense_hdr *sshdr)
1da177e4 2557{
ea73a9f2 2558 return scsi_mode_sense(sdp, dbd, modepage, buffer, len,
1cf72699 2559 SD_TIMEOUT, SD_MAX_RETRIES, data,
ea73a9f2 2560 sshdr);
1da177e4
LT		 2561}
2562
2563/*
2564 * read write protect setting, if possible - called only in sd_revalidate_disk()
48970800 2565 * called with buffer of length SD_BUF_SIZE
1da177e4
LT		 2566 */
2567static void
e73aec82 2568sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer)
ea73a9f2 2569{
1da177e4 2570 int res;
ea73a9f2 2571 struct scsi_device *sdp = sdkp->device;
1da177e4 2572 struct scsi_mode_data data;
70a9b873 2573 int old_wp = sdkp->write_prot;
1da177e4
LT		 2574
2575 set_disk_ro(sdkp->disk, 0);
ea73a9f2 2576 if (sdp->skip_ms_page_3f) {
b2bff6ce 2577 sd_first_printk(KERN_NOTICE, sdkp, "Assuming Write Enabled\n");
1da177e4
LT		 2578 return;
2579 }
2580
ea73a9f2
JB		 2581 if (sdp->use_192_bytes_for_3f) {
2582 res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 192, &data, NULL);
1da177e4
LT		 2583 } else {
2584 /*
2585 * First attempt: ask for all pages (0x3F), but only 4 bytes.
2586 * We have to start carefully: some devices hang if we ask
2587 * for more than is available.
2588 */
ea73a9f2 2589 res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 4, &data, NULL);
1da177e4
LT		 2590
2591 /*
2592 * Second attempt: ask for page 0 When only page 0 is
2593 * implemented, a request for page 3F may return Sense Key
2594 * 5: Illegal Request, Sense Code 24: Invalid field in
2595 * CDB.
2596 */
2597 if (!scsi_status_is_good(res))
ea73a9f2 2598 res = sd_do_mode_sense(sdp, 0, 0, buffer, 4, &data, NULL);
1da177e4
LT		 2599
2600 /*
2601 * Third attempt: ask 255 bytes, as we did earlier.
2602 */
2603 if (!scsi_status_is_good(res))
ea73a9f2
JB		 2604 res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 255,
2605 &data, NULL);
1da177e4
LT		 2606 }
2607
2608 if (!scsi_status_is_good(res)) {
b2bff6ce 2609 sd_first_printk(KERN_WARNING, sdkp,
e73aec82 2610 "Test WP failed, assume Write Enabled\n");
1da177e4
LT		 2611 } else {
2612 sdkp->write_prot = ((data.device_specific & 0x80) != 0);
8acf608e 2613 set_disk_ro(sdkp->disk, sdkp->write_prot);
70a9b873
MP		 2614 if (sdkp->first_scan || old_wp != sdkp->write_prot) {
2615 sd_printk(KERN_NOTICE, sdkp, "Write Protect is %s\n",
2616 sdkp->write_prot ? "on" : "off");
df441cc0 2617 sd_printk(KERN_DEBUG, sdkp, "Mode Sense: %4ph\n", buffer);
70a9b873 2618 }
1da177e4
LT		 2619 }
2620}
2621
2622/*
2623 * sd_read_cache_type - called only from sd_revalidate_disk()
48970800 2624 * called with buffer of length SD_BUF_SIZE
1da177e4
LT		 2625 */
2626static void
e73aec82 2627sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer)
631e8a13 2628{
1da177e4 2629 int len = 0, res;
ea73a9f2 2630 struct scsi_device *sdp = sdkp->device;
1da177e4 2631
631e8a13
AV		 2632 int dbd;
2633 int modepage;
0bcaa111 2634 int first_len;
1da177e4
LT		 2635 struct scsi_mode_data data;
2636 struct scsi_sense_hdr sshdr;
70a9b873
MP		 2637 int old_wce = sdkp->WCE;
2638 int old_rcd = sdkp->RCD;
2639 int old_dpofua = sdkp->DPOFUA;
1da177e4 2640
39c60a09
JB		 2641
2642 if (sdkp->cache_override)
2643 return;
2644
0bcaa111
LT		 2645 first_len = 4;
2646 if (sdp->skip_ms_page_8) {
2647 if (sdp->type == TYPE_RBC)
2648 goto defaults;
2649 else {
2650 if (sdp->skip_ms_page_3f)
2651 goto defaults;
2652 modepage = 0x3F;
2653 if (sdp->use_192_bytes_for_3f)
2654 first_len = 192;
2655 dbd = 0;
2656 }
2657 } else if (sdp->type == TYPE_RBC) {
631e8a13
AV		 2658 modepage = 6;
2659 dbd = 8;
2660 } else {
2661 modepage = 8;
2662 dbd = 0;
2663 }
2664
1da177e4 2665 /* cautiously ask */
0bcaa111
LT		 2666 res = sd_do_mode_sense(sdp, dbd, modepage, buffer, first_len,
2667 &data, &sshdr);
1da177e4
LT		 2668
2669 if (!scsi_status_is_good(res))
2670 goto bad_sense;
2671
6d73c851
AV		 2672 if (!data.header_length) {
2673 modepage = 6;
0bcaa111 2674 first_len = 0;
b2bff6ce
MP		 2675 sd_first_printk(KERN_ERR, sdkp,
2676 "Missing header in MODE_SENSE response\n");
6d73c851
AV		 2677 }
2678
1da177e4
LT		 2679 /* that went OK, now ask for the proper length */
2680 len = data.length;
2681
2682 /*
2683 * We're only interested in the first three bytes, actually.
2684 * But the data cache page is defined for the first 20.
2685 */
2686 if (len < 3)
2687 goto bad_sense;
0bcaa111 2688 else if (len > SD_BUF_SIZE) {
b2bff6ce 2689 sd_first_printk(KERN_NOTICE, sdkp, "Truncating mode parameter "
0bcaa111
LT		 2690 "data from %d to %d bytes\n", len, SD_BUF_SIZE);
2691 len = SD_BUF_SIZE;
2692 }
2693 if (modepage == 0x3F && sdp->use_192_bytes_for_3f)
2694 len = 192;
1da177e4
LT		 2695
2696 /* Get the data */
0bcaa111
LT		 2697 if (len > first_len)
2698 res = sd_do_mode_sense(sdp, dbd, modepage, buffer, len,
2699 &data, &sshdr);
1da177e4
LT		 2700
2701 if (scsi_status_is_good(res)) {
631e8a13 2702 int offset = data.header_length + data.block_descriptor_length;
1da177e4 2703
0bcaa111
LT		 2704 while (offset < len) {
2705 u8 page_code = buffer[offset] & 0x3F;
2706 u8 spf = buffer[offset] & 0x40;
2707
2708 if (page_code == 8 || page_code == 6) {
2709 /* We're interested only in the first 3 bytes.
2710 */
2711 if (len - offset <= 2) {
b2bff6ce
MP		 2712 sd_first_printk(KERN_ERR, sdkp,
2713 "Incomplete mode parameter "
2714 "data\n");
0bcaa111
LT		 2715 goto defaults;
2716 } else {
2717 modepage = page_code;
2718 goto Page_found;
2719 }
2720 } else {
2721 /* Go to the next page */
2722 if (spf && len - offset > 3)
2723 offset += 4 + (buffer[offset+2] << 8) +
2724 buffer[offset+3];
2725 else if (!spf && len - offset > 1)
2726 offset += 2 + buffer[offset+1];
2727 else {
b2bff6ce
MP		 2728 sd_first_printk(KERN_ERR, sdkp,
2729 "Incomplete mode "
2730 "parameter data\n");
0bcaa111
LT		 2731 goto defaults;
2732 }
2733 }
48970800
AV		 2734 }
2735
b2bff6ce 2736 sd_first_printk(KERN_ERR, sdkp, "No Caching mode page found\n");
984f1733
AS		 2737 goto defaults;
2738
0bcaa111 2739 Page_found:
631e8a13
AV		 2740 if (modepage == 8) {
2741 sdkp->WCE = ((buffer[offset + 2] & 0x04) != 0);
2742 sdkp->RCD = ((buffer[offset + 2] & 0x01) != 0);
2743 } else {
2744 sdkp->WCE = ((buffer[offset + 2] & 0x01) == 0);
2745 sdkp->RCD = 0;
2746 }
1da177e4 2747
007365ad 2748 sdkp->DPOFUA = (data.device_specific & 0x10) != 0;
b14bf2d0
AS		 2749 if (sdp->broken_fua) {
2750 sd_first_printk(KERN_NOTICE, sdkp, "Disabling FUA\n");
2751 sdkp->DPOFUA = 0;
26f28197
DLM		 2752 } else if (sdkp->DPOFUA && !sdkp->device->use_10_for_rw &&
2753 !sdkp->device->use_16_for_rw) {
b2bff6ce 2754 sd_first_printk(KERN_NOTICE, sdkp,
e73aec82 2755 "Uses READ/WRITE(6), disabling FUA\n");
007365ad
TH		 2756 sdkp->DPOFUA = 0;
2757 }
2758
2eefd57b
SRT		 2759 /* No cache flush allowed for write protected devices */
2760 if (sdkp->WCE && sdkp->write_prot)
2761 sdkp->WCE = 0;
2762
70a9b873
MP		 2763 if (sdkp->first_scan || old_wce != sdkp->WCE ||
2764 old_rcd != sdkp->RCD || old_dpofua != sdkp->DPOFUA)
2765 sd_printk(KERN_NOTICE, sdkp,
2766 "Write cache: %s, read cache: %s, %s\n",
2767 sdkp->WCE ? "enabled" : "disabled",
2768 sdkp->RCD ? "disabled" : "enabled",
2769 sdkp->DPOFUA ? "supports DPO and FUA"
2770 : "doesn't support DPO or FUA");
1da177e4
LT		 2771
2772 return;
2773 }
2774
2775bad_sense:
ea73a9f2 2776 if (scsi_sense_valid(&sshdr) &&
1da177e4
LT		 2777 sshdr.sense_key == ILLEGAL_REQUEST &&
2778 sshdr.asc == 0x24 && sshdr.ascq == 0x0)
e73aec82 2779 /* Invalid field in CDB */
b2bff6ce 2780 sd_first_printk(KERN_NOTICE, sdkp, "Cache data unavailable\n");
1da177e4 2781 else
b2bff6ce
MP		 2782 sd_first_printk(KERN_ERR, sdkp,
2783 "Asking for cache data failed\n");
1da177e4
LT		 2784
2785defaults:
b81478d8 2786 if (sdp->wce_default_on) {
b2bff6ce
MP		 2787 sd_first_printk(KERN_NOTICE, sdkp,
2788 "Assuming drive cache: write back\n");
b81478d8
NJ		 2789 sdkp->WCE = 1;
2790 } else {
b2bff6ce
MP		 2791 sd_first_printk(KERN_ERR, sdkp,
2792 "Assuming drive cache: write through\n");
b81478d8
NJ		 2793 sdkp->WCE = 0;
2794 }
1da177e4 2795 sdkp->RCD = 0;
48970800 2796 sdkp->DPOFUA = 0;
1da177e4
LT		 2797}
2798
e0597d70
MP		 2799/*
2800 * The ATO bit indicates whether the DIF application tag is available
2801 * for use by the operating system.
2802 */
439d77f7 2803static void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer)
e0597d70
MP		 2804{
2805 int res, offset;
2806 struct scsi_device *sdp = sdkp->device;
2807 struct scsi_mode_data data;
2808 struct scsi_sense_hdr sshdr;
2809
89d94756 2810 if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC)
e0597d70
MP		 2811 return;
2812
2813 if (sdkp->protection_type == 0)
2814 return;
2815
2816 res = scsi_mode_sense(sdp, 1, 0x0a, buffer, 36, SD_TIMEOUT,
2817 SD_MAX_RETRIES, &data, &sshdr);
2818
2819 if (!scsi_status_is_good(res) || !data.header_length ||
2820 data.length < 6) {
b2bff6ce 2821 sd_first_printk(KERN_WARNING, sdkp,
e0597d70
MP		 2822 "getting Control mode page failed, assume no ATO\n");
2823
2824 if (scsi_sense_valid(&sshdr))
2825 sd_print_sense_hdr(sdkp, &sshdr);
2826
2827 return;
2828 }
2829
2830 offset = data.header_length + data.block_descriptor_length;
2831
2832 if ((buffer[offset] & 0x3f) != 0x0a) {
b2bff6ce 2833 sd_first_printk(KERN_ERR, sdkp, "ATO Got wrong page\n");
e0597d70
MP		 2834 return;
2835 }
2836
2837 if ((buffer[offset + 5] & 0x80) == 0)
2838 return;
2839
2840 sdkp->ATO = 1;
2841
2842 return;
2843}
2844
d11b6916
MP		 2845/**
2846 * sd_read_block_limits - Query disk device for preferred I/O sizes.
7529fbb0 2847 * @sdkp: disk to query
d11b6916
MP		 2848 */
2849static void sd_read_block_limits(struct scsi_disk *sdkp)
2850{
2851 unsigned int sector_sz = sdkp->device->sector_size;
bb2d3de1 2852 const int vpd_len = 64;
e3deec09 2853 unsigned char *buffer = kmalloc(vpd_len, GFP_KERNEL);
d11b6916 2854
e3deec09
JB		 2855 if (!buffer ||
2856 /* Block Limits VPD */
2857 scsi_get_vpd_page(sdkp->device, 0xb0, buffer, vpd_len))
2858 goto out;
d11b6916
MP		 2859
2860 blk_queue_io_min(sdkp->disk->queue,
2861 get_unaligned_be16(&buffer[6]) * sector_sz);
ca369d51
MP		 2862
2863 sdkp->max_xfer_blocks = get_unaligned_be32(&buffer[8]);
2864 sdkp->opt_xfer_blocks = get_unaligned_be32(&buffer[12]);
d11b6916 2865
c98a0eb0
MP		 2866 if (buffer[3] == 0x3c) {
2867 unsigned int lba_count, desc_count;
e339c1a7 2868
5db44863 2869 sdkp->max_ws_blocks = (u32)get_unaligned_be64(&buffer[36]);
e339c1a7 2870
c98a0eb0 2871 if (!sdkp->lbpme)
045d3fe7 2872 goto out;
045d3fe7 2873
c98a0eb0
MP		 2874 lba_count = get_unaligned_be32(&buffer[20]);
2875 desc_count = get_unaligned_be32(&buffer[24]);
045d3fe7 2876
c98a0eb0
MP		 2877 if (lba_count && desc_count)
2878 sdkp->max_unmap_blocks = lba_count;
e339c1a7 2879
c98a0eb0 2880 sdkp->unmap_granularity = get_unaligned_be32(&buffer[28]);
e339c1a7
MP		 2881
2882 if (buffer[32] & 0x80)
c98a0eb0 2883 sdkp->unmap_alignment =
e339c1a7 2884 get_unaligned_be32(&buffer[32]) & ~(1 << 31);
c98a0eb0
MP		 2885
2886 if (!sdkp->lbpvpd) { /* LBP VPD page not provided */
2887
2888 if (sdkp->max_unmap_blocks)
2889 sd_config_discard(sdkp, SD_LBP_UNMAP);
2890 else
2891 sd_config_discard(sdkp, SD_LBP_WS16);
2892
2893 } else { /* LBP VPD page tells us what to use */
bcd069bb 2894 if (sdkp->lbpu && sdkp->max_unmap_blocks)
e461338b
MP		 2895 sd_config_discard(sdkp, SD_LBP_UNMAP);
2896 else if (sdkp->lbpws)
c98a0eb0
MP		 2897 sd_config_discard(sdkp, SD_LBP_WS16);
2898 else if (sdkp->lbpws10)
2899 sd_config_discard(sdkp, SD_LBP_WS10);
2900 else
2901 sd_config_discard(sdkp, SD_LBP_DISABLE);
2902 }
e339c1a7
MP		 2903 }
2904
e3deec09 2905 out:
d11b6916
MP		 2906 kfree(buffer);
2907}
2908
3821d768
MP		 2909/**
2910 * sd_read_block_characteristics - Query block dev. characteristics
7529fbb0 2911 * @sdkp: disk to query
3821d768
MP		 2912 */
2913static void sd_read_block_characteristics(struct scsi_disk *sdkp)
2914{
89d94756 2915 struct request_queue *q = sdkp->disk->queue;
e3deec09 2916 unsigned char *buffer;
3821d768 2917 u16 rot;
bb2d3de1 2918 const int vpd_len = 64;
3821d768 2919
e3deec09 2920 buffer = kmalloc(vpd_len, GFP_KERNEL);
3821d768 2921
e3deec09
JB		 2922 if (!buffer ||
2923 /* Block Device Characteristics VPD */
2924 scsi_get_vpd_page(sdkp->device, 0xb1, buffer, vpd_len))
2925 goto out;
3821d768
MP		 2926
2927 rot = get_unaligned_be16(&buffer[4]);
2928
b277da0a 2929 if (rot == 1) {
8b904b5b
BVA		 2930 blk_queue_flag_set(QUEUE_FLAG_NONROT, q);
2931 blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, q);
b277da0a 2932 }
3821d768 2933
68af412c
DLM		 2934 if (sdkp->device->type == TYPE_ZBC) {
2935 /* Host-managed */
89d94756 2936 q->limits.zoned = BLK_ZONED_HM;
68af412c
DLM		 2937 } else {
2938 sdkp->zoned = (buffer[8] >> 4) & 3;
2939 if (sdkp->zoned == 1)
2940 /* Host-aware */
2941 q->limits.zoned = BLK_ZONED_HA;
2942 else
2943 /*
2944 * Treat drive-managed devices as
2945 * regular block devices.
2946 */
2947 q->limits.zoned = BLK_ZONED_NONE;
2948 }
89d94756
HR		 2949 if (blk_queue_is_zoned(q) && sdkp->first_scan)
2950 sd_printk(KERN_NOTICE, sdkp, "Host-%s zoned block device\n",
2951 q->limits.zoned == BLK_ZONED_HM ? "managed" : "aware");
2952
e3deec09 2953 out:
3821d768
MP		 2954 kfree(buffer);
2955}
2956
045d3fe7 2957/**
c98a0eb0 2958 * sd_read_block_provisioning - Query provisioning VPD page
7529fbb0 2959 * @sdkp: disk to query
045d3fe7 2960 */
c98a0eb0 2961static void sd_read_block_provisioning(struct scsi_disk *sdkp)
045d3fe7
MP		 2962{
2963 unsigned char *buffer;
2964 const int vpd_len = 8;
2965
c98a0eb0 2966 if (sdkp->lbpme == 0)
045d3fe7
MP		 2967 return;
2968
2969 buffer = kmalloc(vpd_len, GFP_KERNEL);
2970
2971 if (!buffer || scsi_get_vpd_page(sdkp->device, 0xb2, buffer, vpd_len))
2972 goto out;
2973
c98a0eb0
MP		 2974 sdkp->lbpvpd = 1;
2975 sdkp->lbpu = (buffer[5] >> 7) & 1; /* UNMAP */
2976 sdkp->lbpws = (buffer[5] >> 6) & 1; /* WRITE SAME(16) with UNMAP */
2977 sdkp->lbpws10 = (buffer[5] >> 5) & 1; /* WRITE SAME(10) with UNMAP */
045d3fe7
MP		 2978
2979 out:
2980 kfree(buffer);
2981}
2982
5db44863
MP		 2983static void sd_read_write_same(struct scsi_disk *sdkp, unsigned char *buffer)
2984{
66c28f97
MP		 2985 struct scsi_device *sdev = sdkp->device;
2986
54b2b50c
MP		 2987 if (sdev->host->no_write_same) {
2988 sdev->no_write_same = 1;
2989
2990 return;
2991 }
2992
66c28f97 2993 if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, INQUIRY) < 0) {
af73623f
BS		 2994 /* too large values might cause issues with arcmsr */
2995 int vpd_buf_len = 64;
2996
66c28f97
MP		 2997 sdev->no_report_opcodes = 1;
2998
2999 /* Disable WRITE SAME if REPORT SUPPORTED OPERATION
3000 * CODES is unsupported and the device has an ATA
3001 * Information VPD page (SAT).
3002 */
af73623f 3003 if (!scsi_get_vpd_page(sdev, 0x89, buffer, vpd_buf_len))
66c28f97
MP		 3004 sdev->no_write_same = 1;
3005 }
3006
3007 if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME_16) == 1)
5db44863 3008 sdkp->ws16 = 1;
66c28f97
MP		 3009
3010 if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME) == 1)
3011 sdkp->ws10 = 1;
5db44863
MP		 3012}
3013
d80210f2
CH		 3014static void sd_read_security(struct scsi_disk *sdkp, unsigned char *buffer)
3015{
3016 struct scsi_device *sdev = sdkp->device;
3017
3018 if (!sdev->security_supported)
3019 return;
3020
3021 if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE,
3022 SECURITY_PROTOCOL_IN) == 1 &&
3023 scsi_report_opcode(sdev, buffer, SD_BUF_SIZE,
3024 SECURITY_PROTOCOL_OUT) == 1)
3025 sdkp->security = 1;
3026}
3027
a83da8a4
MP		 3028/*
3029 * Determine the device's preferred I/O size for reads and writes
3030 * unless the reported value is unreasonably small, large, not a
3031 * multiple of the physical block size, or simply garbage.
3032 */
3033static bool sd_validate_opt_xfer_size(struct scsi_disk *sdkp,
3034 unsigned int dev_max)
3035{
3036 struct scsi_device *sdp = sdkp->device;
3037 unsigned int opt_xfer_bytes =
3038 logical_to_bytes(sdp, sdkp->opt_xfer_blocks);
3039
1d5de5bd
MP		 3040 if (sdkp->opt_xfer_blocks == 0)
3041 return false;
3042
a83da8a4
MP		 3043 if (sdkp->opt_xfer_blocks > dev_max) {
3044 sd_first_printk(KERN_WARNING, sdkp,
3045 "Optimal transfer size %u logical blocks " \
3046 "> dev_max (%u logical blocks)\n",
3047 sdkp->opt_xfer_blocks, dev_max);
3048 return false;
3049 }
3050
3051 if (sdkp->opt_xfer_blocks > SD_DEF_XFER_BLOCKS) {
3052 sd_first_printk(KERN_WARNING, sdkp,
3053 "Optimal transfer size %u logical blocks " \
3054 "> sd driver limit (%u logical blocks)\n",
3055 sdkp->opt_xfer_blocks, SD_DEF_XFER_BLOCKS);
3056 return false;
3057 }
3058
3059 if (opt_xfer_bytes < PAGE_SIZE) {
3060 sd_first_printk(KERN_WARNING, sdkp,
3061 "Optimal transfer size %u bytes < " \
3062 "PAGE_SIZE (%u bytes)\n",
3063 opt_xfer_bytes, (unsigned int)PAGE_SIZE);
3064 return false;
3065 }
3066
3067 if (opt_xfer_bytes & (sdkp->physical_block_size - 1)) {
3068 sd_first_printk(KERN_WARNING, sdkp,
3069 "Optimal transfer size %u bytes not a " \
3070 "multiple of physical block size (%u bytes)\n",
3071 opt_xfer_bytes, sdkp->physical_block_size);
3072 return false;
3073 }
3074
3075 sd_first_printk(KERN_INFO, sdkp, "Optimal transfer size %u bytes\n",
3076 opt_xfer_bytes);
3077 return true;
3078}
3079
1da177e4
LT		 3080/**
3081 * sd_revalidate_disk - called the first time a new disk is seen,
3082 * performs disk spin up, read_capacity, etc.
3083 * @disk: struct gendisk we care about
3084 **/
3085static int sd_revalidate_disk(struct gendisk *disk)
3086{
3087 struct scsi_disk *sdkp = scsi_disk(disk);
3088 struct scsi_device *sdp = sdkp->device;
ca369d51 3089 struct request_queue *q = sdkp->disk->queue;
89d94756 3090 sector_t old_capacity = sdkp->capacity;
1da177e4 3091 unsigned char *buffer;
ca369d51 3092 unsigned int dev_max, rw_max;
1da177e4 3093
fa0d34be
MP		 3094 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp,
3095 "sd_revalidate_disk\n"));
1da177e4
LT		 3096
3097 /*
3098 * If the device is offline, don't try and read capacity or any
3099 * of the other niceties.
3100 */
3101 if (!scsi_device_online(sdp))
3102 goto out;
3103
a6123f14 3104 buffer = kmalloc(SD_BUF_SIZE, GFP_KERNEL);
1da177e4 3105 if (!buffer) {
e73aec82
MP		 3106 sd_printk(KERN_WARNING, sdkp, "sd_revalidate_disk: Memory "
3107 "allocation failure.\n");
ea73a9f2 3108 goto out;
1da177e4
LT		 3109 }
3110
e73aec82 3111 sd_spinup_disk(sdkp);
1da177e4
LT		 3112
3113 /*
3114 * Without media there is no reason to ask; moreover, some devices
3115 * react badly if we do.
3116 */
3117 if (sdkp->media_present) {
e73aec82 3118 sd_read_capacity(sdkp, buffer);
ffd4bc2a 3119
e4a05698
JB		 3120 /*
3121 * set the default to rotational. All non-rotational devices
3122 * support the block characteristics VPD page, which will
3123 * cause this to be updated correctly and any device which
3124 * doesn't support it should be treated as rotational.
3125 */
3126 blk_queue_flag_clear(QUEUE_FLAG_NONROT, q);
3127 blk_queue_flag_set(QUEUE_FLAG_ADD_RANDOM, q);
3128
5ddfe085 3129 if (scsi_device_supports_vpd(sdp)) {
c98a0eb0 3130 sd_read_block_provisioning(sdkp);
ffd4bc2a
MP		 3131 sd_read_block_limits(sdkp);
3132 sd_read_block_characteristics(sdkp);
89d94756 3133 sd_zbc_read_zones(sdkp, buffer);
ffd4bc2a
MP		 3134 }
3135
89d94756
HR		 3136 sd_print_capacity(sdkp, old_capacity);
3137
e73aec82
MP		 3138 sd_read_write_protect_flag(sdkp, buffer);
3139 sd_read_cache_type(sdkp, buffer);
e0597d70 3140 sd_read_app_tag_own(sdkp, buffer);
5db44863 3141 sd_read_write_same(sdkp, buffer);
d80210f2 3142 sd_read_security(sdkp, buffer);
1da177e4 3143 }
461d4e90
TH		 3144
3145 /*
3146 * We now have all cache related info, determine how we deal
4913efe4 3147 * with flush requests.
461d4e90 3148 */
cb2fb68d 3149 sd_set_flush_flag(sdkp);
461d4e90 3150
ca369d51
MP		 3151 /* Initial block count limit based on CDB TRANSFER LENGTH field size. */
3152 dev_max = sdp->use_16_for_rw ? SD_MAX_XFER_BLOCKS : SD_DEF_XFER_BLOCKS;
3153
3154 /* Some devices report a maximum block count for READ/WRITE requests. */
3155 dev_max = min_not_zero(dev_max, sdkp->max_xfer_blocks);
3156 q->limits.max_dev_sectors = logical_to_sectors(sdp, dev_max);
3157
a83da8a4 3158 if (sd_validate_opt_xfer_size(sdkp, dev_max)) {
6b7e9cde
MP		 3159 q->limits.io_opt = logical_to_bytes(sdp, sdkp->opt_xfer_blocks);
3160 rw_max = logical_to_sectors(sdp, sdkp->opt_xfer_blocks);
3161 } else
67804145
FZ		 3162 rw_max = min_not_zero(logical_to_sectors(sdp, dev_max),
3163 (sector_t)BLK_DEF_MAX_SECTORS);
3a9794d3 3164
77082ca5
MP		 3165 /* Do not exceed controller limit */
3166 rw_max = min(rw_max, queue_max_hw_sectors(q));
3167
3168 /*
3169 * Only update max_sectors if previously unset or if the current value
3170 * exceeds the capabilities of the hardware.
3171 */
3172 if (sdkp->first_scan ||
3173 q->limits.max_sectors > q->limits.max_dev_sectors ||
3174 q->limits.max_sectors > q->limits.max_hw_sectors)
3175 q->limits.max_sectors = rw_max;
3176
3177 sdkp->first_scan = 0;
4f258a46 3178
f08bb1e0 3179 set_capacity(disk, logical_to_sectors(sdp, sdkp->capacity));
5db44863 3180 sd_config_write_same(sdkp);
1da177e4
LT		 3181 kfree(buffer);
3182
1da177e4
LT		 3183 out:
3184 return 0;
3185}
3186
72ec24bd
TH		 3187/**
3188 * sd_unlock_native_capacity - unlock native capacity
3189 * @disk: struct gendisk to set capacity for
3190 *
3191 * Block layer calls this function if it detects that partitions
3192 * on @disk reach beyond the end of the device. If the SCSI host
3193 * implements ->unlock_native_capacity() method, it's invoked to
3194 * give it a chance to adjust the device capacity.
3195 *
3196 * CONTEXT:
3197 * Defined by block layer. Might sleep.
3198 */
3199static void sd_unlock_native_capacity(struct gendisk *disk)
3200{
3201 struct scsi_device *sdev = scsi_disk(disk)->device;
3202
3203 if (sdev->host->hostt->unlock_native_capacity)
3204 sdev->host->hostt->unlock_native_capacity(sdev);
3205}
3206
3e1a7ff8
TH		 3207/**
3208 * sd_format_disk_name - format disk name
3209 * @prefix: name prefix - ie. "sd" for SCSI disks
3210 * @index: index of the disk to format name for
3211 * @buf: output buffer
3212 * @buflen: length of the output buffer
3213 *
3214 * SCSI disk names starts at sda. The 26th device is sdz and the
3215 * 27th is sdaa. The last one for two lettered suffix is sdzz
3216 * which is followed by sdaaa.
3217 *
3218 * This is basically 26 base counting with one extra 'nil' entry
3ad2f3fb 3219 * at the beginning from the second digit on and can be
3e1a7ff8
TH		 3220 * determined using similar method as 26 base conversion with the
3221 * index shifted -1 after each digit is computed.
3222 *
3223 * CONTEXT:
3224 * Don't care.
3225 *
3226 * RETURNS:
3227 * 0 on success, -errno on failure.
3228 */
3229static int sd_format_disk_name(char *prefix, int index, char *buf, int buflen)
3230{
3231 const int base = 'z' - 'a' + 1;
3232 char *begin = buf + strlen(prefix);
3233 char *end = buf + buflen;
3234 char *p;
3235 int unit;
3236
3237 p = end - 1;
3238 *p = '\0';
3239 unit = base;
3240 do {
3241 if (p == begin)
3242 return -EINVAL;
3243 *--p = 'a' + (index % unit);
3244 index = (index / unit) - 1;
3245 } while (index >= 0);
3246
3247 memmove(begin, p, end - p);
3248 memcpy(buf, prefix, strlen(prefix));
3249
3250 return 0;
3251}
3252
1da177e4
LT		 3253/**
3254 * sd_probe - called during driver initialization and whenever a
3255 * new scsi device is attached to the system. It is called once
3256 * for each scsi device (not just disks) present.
3257 * @dev: pointer to device object
3258 *
3259 * Returns 0 if successful (or not interested in this scsi device
3260 * (e.g. scanner)); 1 when there is an error.
3261 *
3262 * Note: this function is invoked from the scsi mid-level.
3263 * This function sets up the mapping between a given
3264 * <host,channel,id,lun> (found in sdp) and new device name
3265 * (e.g. /dev/sda). More precisely it is the block device major
3266 * and minor number that is chosen here.
3267 *
2db93ce8
PU		 3268 * Assume sd_probe is not re-entrant (for time being)
3269 * Also think about sd_probe() and sd_remove() running coincidentally.
1da177e4
LT		 3270 **/
3271static int sd_probe(struct device *dev)
3272{
3273 struct scsi_device *sdp = to_scsi_device(dev);
3274 struct scsi_disk *sdkp;
3275 struct gendisk *gd;
439d77f7 3276 int index;
1da177e4
LT		 3277 int error;
3278
6fe8c1db 3279 scsi_autopm_get_device(sdp);
1da177e4 3280 error = -ENODEV;
89d94756
HR		 3281 if (sdp->type != TYPE_DISK &&
3282 sdp->type != TYPE_ZBC &&
3283 sdp->type != TYPE_MOD &&
3284 sdp->type != TYPE_RBC)
1da177e4
LT		 3285 goto out;
3286
89d94756
HR		 3287#ifndef CONFIG_BLK_DEV_ZONED
3288 if (sdp->type == TYPE_ZBC)
3289 goto out;
3290#endif
9ccfc756 3291 SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO, sdp,
2db93ce8 3292 "sd_probe\n"));
1da177e4
LT		 3293
3294 error = -ENOMEM;
24669f75 3295 sdkp = kzalloc(sizeof(*sdkp), GFP_KERNEL);
1da177e4
LT		 3296 if (!sdkp)
3297 goto out;
3298
689d6fac 3299 gd = alloc_disk(SD_MINORS);
1da177e4 3300 if (!gd)
c01228db 3301 goto out_free;
1da177e4 3302
94015080
MW		 3303 index = ida_alloc(&sd_index_ida, GFP_KERNEL);
3304 if (index < 0) {
21208ae5 3305 sdev_printk(KERN_WARNING, sdp, "sd_probe: memory exhausted.\n");
1da177e4 3306 goto out_put;
1a03ae0f
MR		 3307 }
3308
3e1a7ff8 3309 error = sd_format_disk_name("sd", index, gd->disk_name, DISK_NAME_LEN);
21208ae5
DK		 3310 if (error) {
3311 sdev_printk(KERN_WARNING, sdp, "SCSI disk (sd) name length exceeded.\n");
f27bac27 3312 goto out_free_index;
21208ae5 3313 }
f27bac27 3314
1da177e4
LT		 3315 sdkp->device = sdp;
3316 sdkp->driver = &sd_template;
3317 sdkp->disk = gd;
3318 sdkp->index = index;
409f3499 3319 atomic_set(&sdkp->openers, 0);
9e1a1537 3320 atomic_set(&sdkp->device->ioerr_cnt, 0);
1da177e4 3321
601e7638
JB		 3322 if (!sdp->request_queue->rq_timeout) {
3323 if (sdp->type != TYPE_MOD)
3324 blk_queue_rq_timeout(sdp->request_queue, SD_TIMEOUT);
3325 else
3326 blk_queue_rq_timeout(sdp->request_queue,
3327 SD_MOD_TIMEOUT);
3328 }
3329
3330 device_initialize(&sdkp->dev);
478a8a05 3331 sdkp->dev.parent = dev;
601e7638 3332 sdkp->dev.class = &sd_disk_class;
02aa2a37 3333 dev_set_name(&sdkp->dev, "%s", dev_name(dev));
601e7638 3334
dee0586e
DC		 3335 error = device_add(&sdkp->dev);
3336 if (error)
601e7638
JB		 3337 goto out_free_index;
3338
478a8a05
AS		 3339 get_device(dev);
3340 dev_set_drvdata(dev, sdkp);
601e7638 3341
82a54da6
BVA		 3342 gd->major = sd_major((index & 0xf0) >> 4);
3343 gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00);
3344
3345 gd->fops = &sd_fops;
3346 gd->private_data = &sdkp->driver;
3347 gd->queue = sdkp->device->request_queue;
3348
3349 /* defaults, until the device tells us otherwise */
3350 sdp->sector_size = 512;
3351 sdkp->capacity = 0;
3352 sdkp->media_present = 1;
3353 sdkp->write_prot = 0;
3354 sdkp->cache_override = 0;
3355 sdkp->WCE = 0;
3356 sdkp->RCD = 0;
3357 sdkp->ATO = 0;
3358 sdkp->first_scan = 1;
3359 sdkp->max_medium_access_timeouts = SD_MAX_MEDIUM_TIMEOUTS;
3360
3361 sd_revalidate_disk(gd);
3362
3363 gd->flags = GENHD_FL_EXT_DEVT;
3364 if (sdp->removable) {
3365 gd->flags |= GENHD_FL_REMOVABLE;
3366 gd->events |= DISK_EVENT_MEDIA_CHANGE;
3367 gd->event_flags = DISK_EVENT_FLAG_POLL | DISK_EVENT_FLAG_UEVENT;
3368 }
3369
3370 blk_pm_runtime_init(sdp->request_queue, dev);
c74f8056
SC		 3371 if (sdp->rpm_autosuspend) {
3372 pm_runtime_set_autosuspend_delay(dev,
3373 sdp->host->hostt->rpm_autosuspend_delay);
3374 }
82a54da6
BVA		 3375 device_add_disk(dev, gd, NULL);
3376 if (sdkp->capacity)
3377 sd_dif_config_host(sdkp);
3378
3379 sd_revalidate_disk(gd);
3380
3381 if (sdkp->security) {
3382 sdkp->opal_dev = init_opal_dev(sdp, &sd_sec_submit);
3383 if (sdkp->opal_dev)
3384 sd_printk(KERN_NOTICE, sdkp, "supports TCG Opal\n");
3385 }
3386
3387 sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n",
3388 sdp->removable ? "removable " : "");
3389 scsi_autopm_put_device(sdp);
1da177e4
LT		 3390
3391 return 0;
3392
f27bac27 3393 out_free_index:
94015080 3394 ida_free(&sd_index_ida, index);
6bdaa1f1 3395 out_put:
1da177e4 3396 put_disk(gd);
f170396c
CIK		 3397 out_free:
3398 kfree(sdkp);
6bdaa1f1 3399 out:
6fe8c1db 3400 scsi_autopm_put_device(sdp);
1da177e4
LT		 3401 return error;
3402}
3403
3404/**
3405 * sd_remove - called whenever a scsi disk (previously recognized by
3406 * sd_probe) is detached from the system. It is called (potentially
3407 * multiple times) during sd module unload.
f2a3313d 3408 * @dev: pointer to device object
1da177e4
LT		 3409 *
3410 * Note: this function is invoked from the scsi mid-level.
3411 * This function potentially frees up a device name (e.g. /dev/sdc)
3412 * that could be re-used by a subsequent sd_probe().
3413 * This function is not called when the built-in sd driver is "exit-ed".
3414 **/
3415static int sd_remove(struct device *dev)
3416{
601e7638 3417 struct scsi_disk *sdkp;
0761df9c 3418 dev_t devt;
1da177e4 3419
601e7638 3420 sdkp = dev_get_drvdata(dev);
0761df9c 3421 devt = disk_devt(sdkp->disk);
478a8a05
AS		 3422 scsi_autopm_get_device(sdkp->device);
3423
3c31b52f 3424 async_synchronize_full_domain(&scsi_sd_pm_domain);
ee959b00 3425 device_del(&sdkp->dev);
1da177e4
LT		 3426 del_gendisk(sdkp->disk);
3427 sd_shutdown(dev);
39b7f1e2 3428
d80210f2
CH		 3429 free_opal_dev(sdkp->opal_dev);
3430
0761df9c
HR		 3431 blk_register_region(devt, SD_MINORS, NULL,
3432 sd_default_probe, NULL, NULL);
3433
0b950672 3434 mutex_lock(&sd_ref_mutex);
39b7f1e2 3435 dev_set_drvdata(dev, NULL);
ee959b00 3436 put_device(&sdkp->dev);
0b950672 3437 mutex_unlock(&sd_ref_mutex);
1da177e4
LT		 3438
3439 return 0;
3440}
3441
3442/**
3443 * scsi_disk_release - Called to free the scsi_disk structure
ee959b00 3444 * @dev: pointer to embedded class device
1da177e4 3445 *
0b950672 3446 * sd_ref_mutex must be held entering this routine. Because it is
1da177e4
LT		 3447 * called on last put, you should always use the scsi_disk_get()
3448 * scsi_disk_put() helpers which manipulate the semaphore directly
ee959b00 3449 * and never do a direct put_device.
1da177e4 3450 **/
ee959b00 3451static void scsi_disk_release(struct device *dev)
1da177e4 3452{
ee959b00 3453 struct scsi_disk *sdkp = to_scsi_disk(dev);
1da177e4 3454 struct gendisk *disk = sdkp->disk;
c14a5726
BVA		 3455 struct request_queue *q = disk->queue;
3456
94015080 3457 ida_free(&sd_index_ida, sdkp->index);
c01228db 3458
c14a5726
BVA		 3459 /*
3460 * Wait until all requests that are in progress have completed.
3461 * This is necessary to avoid that e.g. scsi_end_request() crashes
3462 * due to clearing the disk->private_data pointer. Wait from inside
3463 * scsi_disk_release() instead of from sd_release() to avoid that
3464 * freezing and unfreezing the request queue affects user space I/O
3465 * in case multiple processes open a /dev/sd... node concurrently.
3466 */
3467 blk_mq_freeze_queue(q);
3468 blk_mq_unfreeze_queue(q);
3469
1da177e4 3470 disk->private_data = NULL;
1da177e4 3471 put_disk(disk);
39b7f1e2 3472 put_device(&sdkp->device->sdev_gendev);
1da177e4
LT		 3473
3474 kfree(sdkp);
3475}
3476
cc5d2c8c 3477static int sd_start_stop_device(struct scsi_disk *sdkp, int start)
c3c94c5a
TH		 3478{
3479 unsigned char cmd[6] = { START_STOP }; /* START_VALID */
3480 struct scsi_sense_hdr sshdr;
cc5d2c8c 3481 struct scsi_device *sdp = sdkp->device;
c3c94c5a
TH		 3482 int res;
3483
3484 if (start)
3485 cmd[4] |= 1; /* START */
3486
d2886ea3
SR		 3487 if (sdp->start_stop_pwr_cond)
3488 cmd[4] |= start ? 1 << 4 : 3 << 4; /* Active or Standby */
3489
c3c94c5a
TH		 3490 if (!scsi_device_online(sdp))
3491 return -ENODEV;
3492
fcbfffe2
CH		 3493 res = scsi_execute(sdp, cmd, DMA_NONE, NULL, 0, NULL, &sshdr,
3494 SD_TIMEOUT, SD_MAX_RETRIES, 0, RQF_PM, NULL);
c3c94c5a 3495 if (res) {
ef61329d 3496 sd_print_result(sdkp, "Start/Stop Unit failed", res);
c65be1a6 3497 if (driver_byte(res) == DRIVER_SENSE)
cc5d2c8c 3498 sd_print_sense_hdr(sdkp, &sshdr);
95897910
ON		 3499 if (scsi_sense_valid(&sshdr) &&
3500 /* 0x3a is medium not present */
3501 sshdr.asc == 0x3a)
3502 res = 0;
c3c94c5a
TH		 3503 }
3504
95897910
ON		 3505 /* SCSI error codes must not go to the generic layer */
3506 if (res)
3507 return -EIO;
3508
3509 return 0;
c3c94c5a
TH		 3510}
3511
1da177e4
LT		 3512/*
3513 * Send a SYNCHRONIZE CACHE instruction down to the device through
3514 * the normal SCSI command structure. Wait for the command to
3515 * complete.
3516 */
3517static void sd_shutdown(struct device *dev)
3518{
3d9a1f53 3519 struct scsi_disk *sdkp = dev_get_drvdata(dev);
1da177e4
LT		 3520
3521 if (!sdkp)
3522 return; /* this can happen */
3523
54f57588 3524 if (pm_runtime_suspended(dev))
3d9a1f53 3525 return;
54f57588 3526
95897910 3527 if (sdkp->WCE && sdkp->media_present) {
e73aec82 3528 sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n");
4fa83244 3529 sd_sync_cache(sdkp, NULL);
39b7f1e2 3530 }
c3c94c5a 3531
cc5d2c8c
JB		 3532 if (system_state != SYSTEM_RESTART && sdkp->device->manage_start_stop) {
3533 sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n");
3534 sd_start_stop_device(sdkp, 0);
c3c94c5a 3535 }
39b7f1e2 3536}
1da177e4 3537
95897910 3538static int sd_suspend_common(struct device *dev, bool ignore_stop_errors)
c3c94c5a 3539{
3d9a1f53 3540 struct scsi_disk *sdkp = dev_get_drvdata(dev);
4fa83244 3541 struct scsi_sense_hdr sshdr;
09ff92fe 3542 int ret = 0;
c3c94c5a 3543
13b43891
AS		 3544 if (!sdkp) /* E.g.: runtime suspend following sd_remove() */
3545 return 0;
c3c94c5a 3546
95897910 3547 if (sdkp->WCE && sdkp->media_present) {
cc5d2c8c 3548 sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n");
4fa83244
DB		 3549 ret = sd_sync_cache(sdkp, &sshdr);
3550
95897910
ON		 3551 if (ret) {
3552 /* ignore OFFLINE device */
3553 if (ret == -ENODEV)
4fa83244
DB		 3554 return 0;
3555
3556 if (!scsi_sense_valid(&sshdr) ||
3557 sshdr.sense_key != ILLEGAL_REQUEST)
3558 return ret;
3559
3560 /*
3561 * sshdr.sense_key == ILLEGAL_REQUEST means this drive
3562 * doesn't support sync. There's not much to do and
3563 * suspend shouldn't fail.
3564 */
ed91f7ed 3565 ret = 0;
95897910 3566 }
c3c94c5a
TH		 3567 }
3568
691e3d31 3569 if (sdkp->device->manage_start_stop) {
cc5d2c8c 3570 sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n");
95897910 3571 /* an error is not worth aborting a system sleep */
cc5d2c8c 3572 ret = sd_start_stop_device(sdkp, 0);
95897910
ON		 3573 if (ignore_stop_errors)
3574 ret = 0;
c3c94c5a
TH		 3575 }
3576
09ff92fe 3577 return ret;
c3c94c5a
TH		 3578}
3579
95897910
ON		 3580static int sd_suspend_system(struct device *dev)
3581{
3582 return sd_suspend_common(dev, true);
3583}
3584
3585static int sd_suspend_runtime(struct device *dev)
3586{
3587 return sd_suspend_common(dev, false);
3588}
3589
c3c94c5a
TH		 3590static int sd_resume(struct device *dev)
3591{
3d9a1f53 3592 struct scsi_disk *sdkp = dev_get_drvdata(dev);
d80210f2 3593 int ret;
c3c94c5a 3594
13b43891
AS		 3595 if (!sdkp) /* E.g.: runtime resume at the start of sd_probe() */
3596 return 0;
3597
cc5d2c8c 3598 if (!sdkp->device->manage_start_stop)
3d9a1f53 3599 return 0;
c3c94c5a 3600
cc5d2c8c 3601 sd_printk(KERN_NOTICE, sdkp, "Starting disk\n");
d80210f2
CH		 3602 ret = sd_start_stop_device(sdkp, 1);
3603 if (!ret)
3604 opal_unlock_from_suspend(sdkp->opal_dev);
3605 return ret;
c3c94c5a
TH		 3606}
3607
1da177e4
LT		 3608/**
3609 * init_sd - entry point for this driver (both when built in or when
3610 * a module).
3611 *
3612 * Note: this function registers this driver with the scsi mid-level.
3613 **/
3614static int __init init_sd(void)
3615{
5e4009ba 3616 int majors = 0, i, err;
1da177e4
LT		 3617
3618 SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n"));
3619
0761df9c
HR		 3620 for (i = 0; i < SD_MAJORS; i++) {
3621 if (register_blkdev(sd_major(i), "sd") != 0)
3622 continue;
3623 majors++;
3624 blk_register_region(sd_major(i), SD_MINORS, NULL,
3625 sd_default_probe, NULL, NULL);
3626 }
1da177e4
LT		 3627
3628 if (!majors)
3629 return -ENODEV;
3630
5e4009ba
JG		 3631 err = class_register(&sd_disk_class);
3632 if (err)
3633 goto err_out;
6bdaa1f1 3634
4e7392ec
MP		 3635 sd_cdb_cache = kmem_cache_create("sd_ext_cdb", SD_EXT_CDB_SIZE,
3636 0, 0, NULL);
3637 if (!sd_cdb_cache) {
3638 printk(KERN_ERR "sd: can't init extended cdb cache\n");
8d964478 3639 err = -ENOMEM;
4e7392ec
MP		 3640 goto err_out_class;
3641 }
3642
3643 sd_cdb_pool = mempool_create_slab_pool(SD_MEMPOOL_SIZE, sd_cdb_cache);
3644 if (!sd_cdb_pool) {
3645 printk(KERN_ERR "sd: can't init extended cdb pool\n");
8d964478 3646 err = -ENOMEM;
4e7392ec
MP		 3647 goto err_out_cache;
3648 }
3649
61cce6f6
JA		 3650 sd_page_pool = mempool_create_page_pool(SD_MEMPOOL_SIZE, 0);
3651 if (!sd_page_pool) {
3652 printk(KERN_ERR "sd: can't init discard page pool\n");
3653 err = -ENOMEM;
3654 goto err_out_ppool;
3655 }
3656
afd5e34b
JD		 3657 err = scsi_register_driver(&sd_template.gendrv);
3658 if (err)
3659 goto err_out_driver;
3660
5e4009ba
JG		 3661 return 0;
3662
afd5e34b 3663err_out_driver:
61cce6f6
JA		 3664 mempool_destroy(sd_page_pool);
3665
3666err_out_ppool:
afd5e34b
JD		 3667 mempool_destroy(sd_cdb_pool);
3668
4e7392ec
MP		 3669err_out_cache:
3670 kmem_cache_destroy(sd_cdb_cache);
3671
5e4009ba
JG		 3672err_out_class:
3673 class_unregister(&sd_disk_class);
3674err_out:
3675 for (i = 0; i < SD_MAJORS; i++)
3676 unregister_blkdev(sd_major(i), "sd");
3677 return err;
1da177e4
LT		 3678}
3679
3680/**
3681 * exit_sd - exit point for this driver (when it is a module).
3682 *
3683 * Note: this function unregisters this driver from the scsi mid-level.
3684 **/
3685static void __exit exit_sd(void)
3686{
3687 int i;
3688
3689 SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n"));
3690
afd5e34b 3691 scsi_unregister_driver(&sd_template.gendrv);
4e7392ec 3692 mempool_destroy(sd_cdb_pool);
61cce6f6 3693 mempool_destroy(sd_page_pool);
4e7392ec
MP		 3694 kmem_cache_destroy(sd_cdb_cache);
3695
5e4009ba
JG		 3696 class_unregister(&sd_disk_class);
3697
0761df9c
HR		 3698 for (i = 0; i < SD_MAJORS; i++) {
3699 blk_unregister_region(sd_major(i), SD_MINORS);
1da177e4 3700 unregister_blkdev(sd_major(i), "sd");
0761df9c 3701 }
1da177e4
LT		 3702}
3703
1da177e4
LT		 3704module_init(init_sd);
3705module_exit(exit_sd);
e73aec82
MP		 3706
3707static void sd_print_sense_hdr(struct scsi_disk *sdkp,
3708 struct scsi_sense_hdr *sshdr)
3709{
21045519
HR		 3710 scsi_print_sense_hdr(sdkp->device,
3711 sdkp->disk ? sdkp->disk->disk_name : NULL, sshdr);
e73aec82
MP		 3712}
3713
ef61329d
HR		 3714static void sd_print_result(const struct scsi_disk *sdkp, const char *msg,
3715 int result)
e73aec82 3716{
ef61329d
HR		 3717 const char *hb_string = scsi_hostbyte_string(result);
3718 const char *db_string = scsi_driverbyte_string(result);
3719
3720 if (hb_string || db_string)
3721 sd_printk(KERN_INFO, sdkp,
3722 "%s: Result: hostbyte=%s driverbyte=%s\n", msg,
3723 hb_string ? hb_string : "invalid",
3724 db_string ? db_string : "invalid");
3725 else
3726 sd_printk(KERN_INFO, sdkp,
3727 "%s: Result: hostbyte=0x%02x driverbyte=0x%02x\n",
3728 msg, host_byte(result), driver_byte(result));
e73aec82
MP		 3729}
3730
Linux 6.x block layer and io_uring tree(s)