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scsi: ufs: Remove select of phy-qcom-ufs from ufs-qcom
[linux-2.6-block.git] / drivers / scsi / sd.c
CommitLineData
1da177e4
LT		 1/*
2 * sd.c Copyright (C) 1992 Drew Eckhardt
3 * Copyright (C) 1993, 1994, 1995, 1999 Eric Youngdale
4 *
5 * Linux scsi disk driver
6 * Initial versions: Drew Eckhardt
7 * Subsequent revisions: Eric Youngdale
8 * Modification history:
9 * - Drew Eckhardt <drew@colorado.edu> original
10 * - Eric Youngdale <eric@andante.org> add scatter-gather, multiple
11 * outstanding request, and other enhancements.
12 * Support loadable low-level scsi drivers.
13 * - Jirka Hanika <geo@ff.cuni.cz> support more scsi disks using
14 * eight major numbers.
15 * - Richard Gooch <rgooch@atnf.csiro.au> support devfs.
16 * - Torben Mathiasen <tmm@image.dk> Resource allocation fixes in
17 * sd_init and cleanups.
18 * - Alex Davis <letmein@erols.com> Fix problem where partition info
19 * not being read in sd_open. Fix problem where removable media
20 * could be ejected after sd_open.
21 * - Douglas Gilbert <dgilbert@interlog.com> cleanup for lk 2.5.x
22 * - Badari Pulavarty <pbadari@us.ibm.com>, Matthew Wilcox
23 * <willy@debian.org>, Kurt Garloff <garloff@suse.de>:
24 * Support 32k/1M disks.
25 *
26 * Logging policy (needs CONFIG_SCSI_LOGGING defined):
27 * - setting up transfer: SCSI_LOG_HLQUEUE levels 1 and 2
28 * - end of transfer (bh + scsi_lib): SCSI_LOG_HLCOMPLETE level 1
29 * - entering sd_ioctl: SCSI_LOG_IOCTL level 1
30 * - entering other commands: SCSI_LOG_HLQUEUE level 3
31 * Note: when the logging level is set by the user, it must be greater
32 * than the level indicated above to trigger output.
33 */
34
1da177e4
LT		 35#include <linux/module.h>
36#include <linux/fs.h>
37#include <linux/kernel.h>
1da177e4
LT		 38#include <linux/mm.h>
39#include <linux/bio.h>
40#include <linux/genhd.h>
41#include <linux/hdreg.h>
42#include <linux/errno.h>
43#include <linux/idr.h>
44#include <linux/interrupt.h>
45#include <linux/init.h>
46#include <linux/blkdev.h>
47#include <linux/blkpg.h>
bca6b067 48#include <linux/blk-pm.h>
1da177e4 49#include <linux/delay.h>
0b950672 50#include <linux/mutex.h>
7404ad3b 51#include <linux/string_helpers.h>
4ace92fc 52#include <linux/async.h>
5a0e3ad6 53#include <linux/slab.h>
d80210f2 54#include <linux/sed-opal.h>
54f57588 55#include <linux/pm_runtime.h>
924d55b0 56#include <linux/pr.h>
8475c811 57#include <linux/t10-pi.h>
7c0f6ba6 58#include <linux/uaccess.h>
8f76d151 59#include <asm/unaligned.h>
1da177e4
LT		 60
61#include <scsi/scsi.h>
62#include <scsi/scsi_cmnd.h>
63#include <scsi/scsi_dbg.h>
64#include <scsi/scsi_device.h>
65#include <scsi/scsi_driver.h>
66#include <scsi/scsi_eh.h>
67#include <scsi/scsi_host.h>
68#include <scsi/scsi_ioctl.h>
1da177e4
LT		 69#include <scsi/scsicam.h>
70
aa91696e 71#include "sd.h"
a7a20d10 72#include "scsi_priv.h"
1da177e4
LT		 73#include "scsi_logging.h"
74
f018fa55
RH		 75MODULE_AUTHOR("Eric Youngdale");
76MODULE_DESCRIPTION("SCSI disk (sd) driver");
77MODULE_LICENSE("GPL");
78
79MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK0_MAJOR);
80MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK1_MAJOR);
81MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK2_MAJOR);
82MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK3_MAJOR);
83MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK4_MAJOR);
84MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK5_MAJOR);
85MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK6_MAJOR);
86MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK7_MAJOR);
87MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK8_MAJOR);
88MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK9_MAJOR);
89MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK10_MAJOR);
90MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK11_MAJOR);
91MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK12_MAJOR);
92MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK13_MAJOR);
93MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK14_MAJOR);
94MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK15_MAJOR);
d7b8bcb0
MT		 95MODULE_ALIAS_SCSI_DEVICE(TYPE_DISK);
96MODULE_ALIAS_SCSI_DEVICE(TYPE_MOD);
97MODULE_ALIAS_SCSI_DEVICE(TYPE_RBC);
89d94756 98MODULE_ALIAS_SCSI_DEVICE(TYPE_ZBC);
f018fa55 99
870d6656 100#if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT)
f615b48c 101#define SD_MINORS 16
870d6656 102#else
3e1a7ff8 103#define SD_MINORS 0
870d6656
TH		 104#endif
105
c98a0eb0 106static void sd_config_discard(struct scsi_disk *, unsigned int);
5db44863 107static void sd_config_write_same(struct scsi_disk *);
7b3d9545 108static int sd_revalidate_disk(struct gendisk *);
72ec24bd 109static void sd_unlock_native_capacity(struct gendisk *disk);
7b3d9545
LT		 110static int sd_probe(struct device *);
111static int sd_remove(struct device *);
112static void sd_shutdown(struct device *);
95897910
ON		 113static int sd_suspend_system(struct device *);
114static int sd_suspend_runtime(struct device *);
7b3d9545
LT		 115static int sd_resume(struct device *);
116static void sd_rescan(struct device *);
159b2cbf 117static blk_status_t sd_init_command(struct scsi_cmnd *SCpnt);
a1b73fc1 118static void sd_uninit_command(struct scsi_cmnd *SCpnt);
7b3d9545 119static int sd_done(struct scsi_cmnd *);
7a38dc0b 120static void sd_eh_reset(struct scsi_cmnd *);
2451079b 121static int sd_eh_action(struct scsi_cmnd *, int);
7b3d9545 122static void sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer);
ee959b00 123static void scsi_disk_release(struct device *cdev);
7b3d9545 124static void sd_print_sense_hdr(struct scsi_disk *, struct scsi_sense_hdr *);
ef61329d 125static void sd_print_result(const struct scsi_disk *, const char *, int);
7b3d9545 126
f27bac27 127static DEFINE_IDA(sd_index_ida);
1da177e4
LT		 128
129/* This semaphore is used to mediate the 0->1 reference get in the
130 * face of object destruction (i.e. we can't allow a get on an
131 * object after last put) */
0b950672 132static DEFINE_MUTEX(sd_ref_mutex);
1da177e4 133
439d77f7
HS		 134static struct kmem_cache *sd_cdb_cache;
135static mempool_t *sd_cdb_pool;
61cce6f6 136static mempool_t *sd_page_pool;
4e7392ec 137
6bdaa1f1
JB		 138static const char *sd_cache_types[] = {
139 "write through", "none", "write back",
140 "write back, no read (daft)"
141};
142
cb2fb68d
VC		 143static void sd_set_flush_flag(struct scsi_disk *sdkp)
144{
eb310e23 145 bool wc = false, fua = false;
cb2fb68d
VC		 146
147 if (sdkp->WCE) {
eb310e23 148 wc = true;
cb2fb68d 149 if (sdkp->DPOFUA)
eb310e23 150 fua = true;
cb2fb68d
VC		 151 }
152
eb310e23 153 blk_queue_write_cache(sdkp->disk->queue, wc, fua);
cb2fb68d
VC		 154}
155
ee959b00 156static ssize_t
e1ea2351
GKH		 157cache_type_store(struct device *dev, struct device_attribute *attr,
158 const char *buf, size_t count)
6bdaa1f1 159{
4c11712a 160 int ct, rcd, wce, sp;
ee959b00 161 struct scsi_disk *sdkp = to_scsi_disk(dev);
6bdaa1f1
JB		 162 struct scsi_device *sdp = sdkp->device;
163 char buffer[64];
164 char *buffer_data;
165 struct scsi_mode_data data;
166 struct scsi_sense_hdr sshdr;
2ee3e26c 167 static const char temp[] = "temporary ";
6bdaa1f1
JB		 168 int len;
169
89d94756 170 if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC)
6bdaa1f1
JB		 171 /* no cache control on RBC devices; theoretically they
172 * can do it, but there's probably so many exceptions
173 * it's not worth the risk */
174 return -EINVAL;
175
39c60a09
JB		 176 if (strncmp(buf, temp, sizeof(temp) - 1) == 0) {
177 buf += sizeof(temp) - 1;
178 sdkp->cache_override = 1;
179 } else {
180 sdkp->cache_override = 0;
181 }
182
4c11712a 183 ct = sysfs_match_string(sd_cache_types, buf);
6bdaa1f1
JB		 184 if (ct < 0)
185 return -EINVAL;
4c11712a 186
6bdaa1f1 187 rcd = ct & 0x01 ? 1 : 0;
2eefd57b 188 wce = (ct & 0x02) && !sdkp->write_prot ? 1 : 0;
39c60a09
JB		 189
190 if (sdkp->cache_override) {
191 sdkp->WCE = wce;
192 sdkp->RCD = rcd;
cb2fb68d 193 sd_set_flush_flag(sdkp);
39c60a09
JB		 194 return count;
195 }
196
6bdaa1f1
JB		 197 if (scsi_mode_sense(sdp, 0x08, 8, buffer, sizeof(buffer), SD_TIMEOUT,
198 SD_MAX_RETRIES, &data, NULL))
199 return -EINVAL;
a9312fb8 200 len = min_t(size_t, sizeof(buffer), data.length - data.header_length -
6bdaa1f1
JB		 201 data.block_descriptor_length);
202 buffer_data = buffer + data.header_length +
203 data.block_descriptor_length;
204 buffer_data[2] &= ~0x05;
205 buffer_data[2] |= wce << 2 | rcd;
206 sp = buffer_data[0] & 0x80 ? 1 : 0;
2c5d16d6 207 buffer_data[0] &= ~0x80;
6bdaa1f1
JB		 208
209 if (scsi_mode_select(sdp, 1, sp, 8, buffer_data, len, SD_TIMEOUT,
210 SD_MAX_RETRIES, &data, &sshdr)) {
211 if (scsi_sense_valid(&sshdr))
e73aec82 212 sd_print_sense_hdr(sdkp, &sshdr);
6bdaa1f1
JB		 213 return -EINVAL;
214 }
f98a8cae 215 revalidate_disk(sdkp->disk);
6bdaa1f1
JB		 216 return count;
217}
218
ee959b00 219static ssize_t
e1ea2351
GKH		 220manage_start_stop_show(struct device *dev, struct device_attribute *attr,
221 char *buf)
222{
223 struct scsi_disk *sdkp = to_scsi_disk(dev);
224 struct scsi_device *sdp = sdkp->device;
225
4c11712a 226 return sprintf(buf, "%u\n", sdp->manage_start_stop);
e1ea2351
GKH		 227}
228
229static ssize_t
230manage_start_stop_store(struct device *dev, struct device_attribute *attr,
231 const char *buf, size_t count)
c3c94c5a 232{
ee959b00 233 struct scsi_disk *sdkp = to_scsi_disk(dev);
c3c94c5a 234 struct scsi_device *sdp = sdkp->device;
623401ee 235 bool v;
c3c94c5a
TH		 236
237 if (!capable(CAP_SYS_ADMIN))
238 return -EACCES;
239
623401ee 240 if (kstrtobool(buf, &v))
241 return -EINVAL;
242
243 sdp->manage_start_stop = v;
c3c94c5a
TH		 244
245 return count;
246}
e1ea2351 247static DEVICE_ATTR_RW(manage_start_stop);
c3c94c5a 248
ee959b00 249static ssize_t
e1ea2351
GKH		 250allow_restart_show(struct device *dev, struct device_attribute *attr, char *buf)
251{
252 struct scsi_disk *sdkp = to_scsi_disk(dev);
253
4c11712a 254 return sprintf(buf, "%u\n", sdkp->device->allow_restart);
e1ea2351
GKH		 255}
256
257static ssize_t
258allow_restart_store(struct device *dev, struct device_attribute *attr,
259 const char *buf, size_t count)
a144c5ae 260{
658e9a6d 261 bool v;
ee959b00 262 struct scsi_disk *sdkp = to_scsi_disk(dev);
a144c5ae
BK		 263 struct scsi_device *sdp = sdkp->device;
264
265 if (!capable(CAP_SYS_ADMIN))
266 return -EACCES;
267
89d94756 268 if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC)
a144c5ae
BK		 269 return -EINVAL;
270
658e9a6d 271 if (kstrtobool(buf, &v))
272 return -EINVAL;
273
274 sdp->allow_restart = v;
a144c5ae
BK		 275
276 return count;
277}
e1ea2351 278static DEVICE_ATTR_RW(allow_restart);
a144c5ae 279
ee959b00 280static ssize_t
e1ea2351 281cache_type_show(struct device *dev, struct device_attribute *attr, char *buf)
6bdaa1f1 282{
ee959b00 283 struct scsi_disk *sdkp = to_scsi_disk(dev);
6bdaa1f1
JB		 284 int ct = sdkp->RCD + 2*sdkp->WCE;
285
4c11712a 286 return sprintf(buf, "%s\n", sd_cache_types[ct]);
6bdaa1f1 287}
e1ea2351 288static DEVICE_ATTR_RW(cache_type);
6bdaa1f1 289
ee959b00 290static ssize_t
e1ea2351 291FUA_show(struct device *dev, struct device_attribute *attr, char *buf)
6bdaa1f1 292{
ee959b00 293 struct scsi_disk *sdkp = to_scsi_disk(dev);
6bdaa1f1 294
4c11712a 295 return sprintf(buf, "%u\n", sdkp->DPOFUA);
6bdaa1f1 296}
e1ea2351 297static DEVICE_ATTR_RO(FUA);
6bdaa1f1 298
ee959b00 299static ssize_t
e1ea2351
GKH		 300protection_type_show(struct device *dev, struct device_attribute *attr,
301 char *buf)
e0597d70
MP		 302{
303 struct scsi_disk *sdkp = to_scsi_disk(dev);
304
4c11712a 305 return sprintf(buf, "%u\n", sdkp->protection_type);
e0597d70
MP		 306}
307
8172499a 308static ssize_t
e1ea2351
GKH		 309protection_type_store(struct device *dev, struct device_attribute *attr,
310 const char *buf, size_t count)
8172499a
MP		 311{
312 struct scsi_disk *sdkp = to_scsi_disk(dev);
313 unsigned int val;
314 int err;
315
316 if (!capable(CAP_SYS_ADMIN))
317 return -EACCES;
318
319 err = kstrtouint(buf, 10, &val);
320
321 if (err)
322 return err;
323
830cc351 324 if (val <= T10_PI_TYPE3_PROTECTION)
8172499a
MP		 325 sdkp->protection_type = val;
326
327 return count;
328}
e1ea2351 329static DEVICE_ATTR_RW(protection_type);
8172499a 330
518fa8e3 331static ssize_t
e1ea2351
GKH		 332protection_mode_show(struct device *dev, struct device_attribute *attr,
333 char *buf)
518fa8e3
MP		 334{
335 struct scsi_disk *sdkp = to_scsi_disk(dev);
336 struct scsi_device *sdp = sdkp->device;
337 unsigned int dif, dix;
338
339 dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type);
340 dix = scsi_host_dix_capable(sdp->host, sdkp->protection_type);
341
8475c811 342 if (!dix && scsi_host_dix_capable(sdp->host, T10_PI_TYPE0_PROTECTION)) {
518fa8e3
MP		 343 dif = 0;
344 dix = 1;
345 }
346
347 if (!dif && !dix)
4c11712a 348 return sprintf(buf, "none\n");
518fa8e3 349
4c11712a 350 return sprintf(buf, "%s%u\n", dix ? "dix" : "dif", dif);
518fa8e3 351}
e1ea2351 352static DEVICE_ATTR_RO(protection_mode);
518fa8e3 353
e0597d70 354static ssize_t
e1ea2351 355app_tag_own_show(struct device *dev, struct device_attribute *attr, char *buf)
e0597d70
MP		 356{
357 struct scsi_disk *sdkp = to_scsi_disk(dev);
358
4c11712a 359 return sprintf(buf, "%u\n", sdkp->ATO);
e0597d70 360}
e1ea2351 361static DEVICE_ATTR_RO(app_tag_own);
e0597d70 362
e339c1a7 363static ssize_t
e1ea2351
GKH		 364thin_provisioning_show(struct device *dev, struct device_attribute *attr,
365 char *buf)
e339c1a7
MP		 366{
367 struct scsi_disk *sdkp = to_scsi_disk(dev);
368
4c11712a 369 return sprintf(buf, "%u\n", sdkp->lbpme);
c98a0eb0 370}
e1ea2351 371static DEVICE_ATTR_RO(thin_provisioning);
c98a0eb0 372
4c11712a 373/* sysfs_match_string() requires dense arrays */
c98a0eb0
MP		 374static const char *lbp_mode[] = {
375 [SD_LBP_FULL] = "full",
376 [SD_LBP_UNMAP] = "unmap",
377 [SD_LBP_WS16] = "writesame_16",
378 [SD_LBP_WS10] = "writesame_10",
379 [SD_LBP_ZERO] = "writesame_zero",
380 [SD_LBP_DISABLE] = "disabled",
381};
382
383static ssize_t
e1ea2351
GKH		 384provisioning_mode_show(struct device *dev, struct device_attribute *attr,
385 char *buf)
c98a0eb0
MP		 386{
387 struct scsi_disk *sdkp = to_scsi_disk(dev);
388
4c11712a 389 return sprintf(buf, "%s\n", lbp_mode[sdkp->provisioning_mode]);
c98a0eb0
MP		 390}
391
392static ssize_t
e1ea2351
GKH		 393provisioning_mode_store(struct device *dev, struct device_attribute *attr,
394 const char *buf, size_t count)
c98a0eb0
MP		 395{
396 struct scsi_disk *sdkp = to_scsi_disk(dev);
397 struct scsi_device *sdp = sdkp->device;
4c11712a 398 int mode;
c98a0eb0
MP		 399
400 if (!capable(CAP_SYS_ADMIN))
401 return -EACCES;
402
89d94756
HR		 403 if (sd_is_zoned(sdkp)) {
404 sd_config_discard(sdkp, SD_LBP_DISABLE);
405 return count;
406 }
407
c98a0eb0
MP		 408 if (sdp->type != TYPE_DISK)
409 return -EINVAL;
410
4c11712a
MP		 411 mode = sysfs_match_string(lbp_mode, buf);
412 if (mode < 0)
c98a0eb0
MP		 413 return -EINVAL;
414
4c11712a
MP		 415 sd_config_discard(sdkp, mode);
416
c98a0eb0 417 return count;
e339c1a7 418}
e1ea2351 419static DEVICE_ATTR_RW(provisioning_mode);
e339c1a7 420
4c11712a 421/* sysfs_match_string() requires dense arrays */
e6bd9312
MP		 422static const char *zeroing_mode[] = {
423 [SD_ZERO_WRITE] = "write",
424 [SD_ZERO_WS] = "writesame",
425 [SD_ZERO_WS16_UNMAP] = "writesame_16_unmap",
426 [SD_ZERO_WS10_UNMAP] = "writesame_10_unmap",
427};
428
429static ssize_t
430zeroing_mode_show(struct device *dev, struct device_attribute *attr,
431 char *buf)
432{
433 struct scsi_disk *sdkp = to_scsi_disk(dev);
434
4c11712a 435 return sprintf(buf, "%s\n", zeroing_mode[sdkp->zeroing_mode]);
e6bd9312
MP		 436}
437
438static ssize_t
439zeroing_mode_store(struct device *dev, struct device_attribute *attr,
440 const char *buf, size_t count)
441{
442 struct scsi_disk *sdkp = to_scsi_disk(dev);
4c11712a 443 int mode;
e6bd9312
MP		 444
445 if (!capable(CAP_SYS_ADMIN))
446 return -EACCES;
447
4c11712a
MP		 448 mode = sysfs_match_string(zeroing_mode, buf);
449 if (mode < 0)
e6bd9312
MP		 450 return -EINVAL;
451
4c11712a
MP		 452 sdkp->zeroing_mode = mode;
453
e6bd9312
MP		 454 return count;
455}
456static DEVICE_ATTR_RW(zeroing_mode);
457
18a4d0a2 458static ssize_t
e1ea2351
GKH		 459max_medium_access_timeouts_show(struct device *dev,
460 struct device_attribute *attr, char *buf)
18a4d0a2
MP		 461{
462 struct scsi_disk *sdkp = to_scsi_disk(dev);
463
4c11712a 464 return sprintf(buf, "%u\n", sdkp->max_medium_access_timeouts);
18a4d0a2
MP		 465}
466
467static ssize_t
e1ea2351
GKH		 468max_medium_access_timeouts_store(struct device *dev,
469 struct device_attribute *attr, const char *buf,
470 size_t count)
18a4d0a2
MP		 471{
472 struct scsi_disk *sdkp = to_scsi_disk(dev);
473 int err;
474
475 if (!capable(CAP_SYS_ADMIN))
476 return -EACCES;
477
478 err = kstrtouint(buf, 10, &sdkp->max_medium_access_timeouts);
479
480 return err ? err : count;
481}
e1ea2351 482static DEVICE_ATTR_RW(max_medium_access_timeouts);
18a4d0a2 483
5db44863 484static ssize_t
e1ea2351
GKH		 485max_write_same_blocks_show(struct device *dev, struct device_attribute *attr,
486 char *buf)
5db44863
MP		 487{
488 struct scsi_disk *sdkp = to_scsi_disk(dev);
489
4c11712a 490 return sprintf(buf, "%u\n", sdkp->max_ws_blocks);
5db44863
MP		 491}
492
493static ssize_t
e1ea2351
GKH		 494max_write_same_blocks_store(struct device *dev, struct device_attribute *attr,
495 const char *buf, size_t count)
5db44863
MP		 496{
497 struct scsi_disk *sdkp = to_scsi_disk(dev);
498 struct scsi_device *sdp = sdkp->device;
499 unsigned long max;
500 int err;
501
502 if (!capable(CAP_SYS_ADMIN))
503 return -EACCES;
504
89d94756 505 if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC)
5db44863
MP		 506 return -EINVAL;
507
508 err = kstrtoul(buf, 10, &max);
509
510 if (err)
511 return err;
512
513 if (max == 0)
514 sdp->no_write_same = 1;
66c28f97
MP		 515 else if (max <= SD_MAX_WS16_BLOCKS) {
516 sdp->no_write_same = 0;
5db44863 517 sdkp->max_ws_blocks = max;
66c28f97 518 }
5db44863
MP		 519
520 sd_config_write_same(sdkp);
521
522 return count;
523}
e1ea2351
GKH		 524static DEVICE_ATTR_RW(max_write_same_blocks);
525
526static struct attribute *sd_disk_attrs[] = {
527 &dev_attr_cache_type.attr,
528 &dev_attr_FUA.attr,
529 &dev_attr_allow_restart.attr,
530 &dev_attr_manage_start_stop.attr,
531 &dev_attr_protection_type.attr,
532 &dev_attr_protection_mode.attr,
533 &dev_attr_app_tag_own.attr,
534 &dev_attr_thin_provisioning.attr,
535 &dev_attr_provisioning_mode.attr,
e6bd9312 536 &dev_attr_zeroing_mode.attr,
e1ea2351
GKH		 537 &dev_attr_max_write_same_blocks.attr,
538 &dev_attr_max_medium_access_timeouts.attr,
539 NULL,
6bdaa1f1 540};
e1ea2351 541ATTRIBUTE_GROUPS(sd_disk);
6bdaa1f1
JB		 542
543static struct class sd_disk_class = {
544 .name = "scsi_disk",
545 .owner = THIS_MODULE,
ee959b00 546 .dev_release = scsi_disk_release,
e1ea2351 547 .dev_groups = sd_disk_groups,
6bdaa1f1 548};
1da177e4 549
691e3d31 550static const struct dev_pm_ops sd_pm_ops = {
95897910 551 .suspend = sd_suspend_system,
691e3d31 552 .resume = sd_resume,
95897910 553 .poweroff = sd_suspend_system,
691e3d31 554 .restore = sd_resume,
95897910 555 .runtime_suspend = sd_suspend_runtime,
691e3d31
AL		 556 .runtime_resume = sd_resume,
557};
558
1da177e4 559static struct scsi_driver sd_template = {
1da177e4
LT		 560 .gendrv = {
561 .name = "sd",
3af6b352 562 .owner = THIS_MODULE,
1da177e4
LT		 563 .probe = sd_probe,
564 .remove = sd_remove,
565 .shutdown = sd_shutdown,
691e3d31 566 .pm = &sd_pm_ops,
1da177e4
LT		 567 },
568 .rescan = sd_rescan,
a1b73fc1
CH		 569 .init_command = sd_init_command,
570 .uninit_command = sd_uninit_command,
7b3d9545 571 .done = sd_done,
18a4d0a2 572 .eh_action = sd_eh_action,
7a38dc0b 573 .eh_reset = sd_eh_reset,
1da177e4
LT		 574};
575
0761df9c
HR		 576/*
577 * Dummy kobj_map->probe function.
578 * The default ->probe function will call modprobe, which is
579 * pointless as this module is already loaded.
580 */
581static struct kobject *sd_default_probe(dev_t devt, int *partno, void *data)
582{
583 return NULL;
584}
585
1da177e4
LT		 586/*
587 * Device no to disk mapping:
588 *
589 * major disc2 disc p1
590 * |............|.............|....|....| <- dev_t
591 * 31 20 19 8 7 4 3 0
592 *
593 * Inside a major, we have 16k disks, however mapped non-
594 * contiguously. The first 16 disks are for major0, the next
595 * ones with major1, ... Disk 256 is for major0 again, disk 272
596 * for major1, ...
597 * As we stay compatible with our numbering scheme, we can reuse
598 * the well-know SCSI majors 8, 65--71, 136--143.
599 */
600static int sd_major(int major_idx)
601{
602 switch (major_idx) {
603 case 0:
604 return SCSI_DISK0_MAJOR;
605 case 1 ... 7:
606 return SCSI_DISK1_MAJOR + major_idx - 1;
607 case 8 ... 15:
608 return SCSI_DISK8_MAJOR + major_idx - 8;
609 default:
610 BUG();
611 return 0; /* shut up gcc */
612 }
613}
614
3d9a1f53 615static struct scsi_disk *scsi_disk_get(struct gendisk *disk)
1da177e4
LT		 616{
617 struct scsi_disk *sdkp = NULL;
618
3d9a1f53
CH		 619 mutex_lock(&sd_ref_mutex);
620
39b7f1e2
AS		 621 if (disk->private_data) {
622 sdkp = scsi_disk(disk);
623 if (scsi_device_get(sdkp->device) == 0)
ee959b00 624 get_device(&sdkp->dev);
39b7f1e2
AS		 625 else
626 sdkp = NULL;
627 }
0b950672 628 mutex_unlock(&sd_ref_mutex);
1da177e4
LT		 629 return sdkp;
630}
631
632static void scsi_disk_put(struct scsi_disk *sdkp)
633{
634 struct scsi_device *sdev = sdkp->device;
635
0b950672 636 mutex_lock(&sd_ref_mutex);
ee959b00 637 put_device(&sdkp->dev);
1da177e4 638 scsi_device_put(sdev);
0b950672 639 mutex_unlock(&sd_ref_mutex);
1da177e4
LT		 640}
641
d80210f2
CH		 642#ifdef CONFIG_BLK_SED_OPAL
643static int sd_sec_submit(void *data, u16 spsp, u8 secp, void *buffer,
644 size_t len, bool send)
645{
646 struct scsi_device *sdev = data;
647 u8 cdb[12] = { 0, };
648 int ret;
649
650 cdb[0] = send ? SECURITY_PROTOCOL_OUT : SECURITY_PROTOCOL_IN;
651 cdb[1] = secp;
652 put_unaligned_be16(spsp, &cdb[2]);
653 put_unaligned_be32(len, &cdb[6]);
654
655 ret = scsi_execute_req(sdev, cdb,
656 send ? DMA_TO_DEVICE : DMA_FROM_DEVICE,
657 buffer, len, NULL, SD_TIMEOUT, SD_MAX_RETRIES, NULL);
658 return ret <= 0 ? ret : -EIO;
659}
660#endif /* CONFIG_BLK_SED_OPAL */
661
082c2cd2
JG		 662/*
663 * Look up the DIX operation based on whether the command is read or
664 * write and whether dix and dif are enabled.
665 */
666static unsigned int sd_prot_op(bool write, bool dix, bool dif)
667{
668 /* Lookup table: bit 2 (write), bit 1 (dix), bit 0 (dif) */
669 static const unsigned int ops[] = { /* wrt dix dif */
670 SCSI_PROT_NORMAL, /* 0 0 0 */
671 SCSI_PROT_READ_STRIP, /* 0 0 1 */
672 SCSI_PROT_READ_INSERT, /* 0 1 0 */
673 SCSI_PROT_READ_PASS, /* 0 1 1 */
674 SCSI_PROT_NORMAL, /* 1 0 0 */
675 SCSI_PROT_WRITE_INSERT, /* 1 0 1 */
676 SCSI_PROT_WRITE_STRIP, /* 1 1 0 */
677 SCSI_PROT_WRITE_PASS, /* 1 1 1 */
678 };
679
680 return ops[write << 2 | dix << 1 | dif];
681}
682
683/*
684 * Returns a mask of the protection flags that are valid for a given DIX
685 * operation.
686 */
687static unsigned int sd_prot_flag_mask(unsigned int prot_op)
688{
689 static const unsigned int flag_mask[] = {
690 [SCSI_PROT_NORMAL] = 0,
691
692 [SCSI_PROT_READ_STRIP] = SCSI_PROT_TRANSFER_PI |
693 SCSI_PROT_GUARD_CHECK |
694 SCSI_PROT_REF_CHECK |
695 SCSI_PROT_REF_INCREMENT,
696
697 [SCSI_PROT_READ_INSERT] = SCSI_PROT_REF_INCREMENT |
698 SCSI_PROT_IP_CHECKSUM,
699
700 [SCSI_PROT_READ_PASS] = SCSI_PROT_TRANSFER_PI |
701 SCSI_PROT_GUARD_CHECK |
702 SCSI_PROT_REF_CHECK |
703 SCSI_PROT_REF_INCREMENT |
704 SCSI_PROT_IP_CHECKSUM,
705
706 [SCSI_PROT_WRITE_INSERT] = SCSI_PROT_TRANSFER_PI |
707 SCSI_PROT_REF_INCREMENT,
708
709 [SCSI_PROT_WRITE_STRIP] = SCSI_PROT_GUARD_CHECK |
710 SCSI_PROT_REF_CHECK |
711 SCSI_PROT_REF_INCREMENT |
712 SCSI_PROT_IP_CHECKSUM,
713
714 [SCSI_PROT_WRITE_PASS] = SCSI_PROT_TRANSFER_PI |
715 SCSI_PROT_GUARD_CHECK |
716 SCSI_PROT_REF_CHECK |
717 SCSI_PROT_REF_INCREMENT |
718 SCSI_PROT_IP_CHECKSUM,
719 };
720
721 return flag_mask[prot_op];
722}
723
c611529e
MP		 724static unsigned char sd_setup_protect_cmnd(struct scsi_cmnd *scmd,
725 unsigned int dix, unsigned int dif)
35e1a5d9 726{
c611529e
MP		 727 struct bio *bio = scmd->request->bio;
728 unsigned int prot_op = sd_prot_op(rq_data_dir(scmd->request), dix, dif);
729 unsigned int protect = 0;
730
731 if (dix) { /* DIX Type 0, 1, 2, 3 */
732 if (bio_integrity_flagged(bio, BIP_IP_CHECKSUM))
733 scmd->prot_flags |= SCSI_PROT_IP_CHECKSUM;
734
735 if (bio_integrity_flagged(bio, BIP_CTRL_NOCHECK) == false)
736 scmd->prot_flags |= SCSI_PROT_GUARD_CHECK;
737 }
738
8475c811 739 if (dif != T10_PI_TYPE3_PROTECTION) { /* DIX/DIF Type 0, 1, 2 */
c611529e
MP		 740 scmd->prot_flags |= SCSI_PROT_REF_INCREMENT;
741
742 if (bio_integrity_flagged(bio, BIP_CTRL_NOCHECK) == false)
743 scmd->prot_flags |= SCSI_PROT_REF_CHECK;
744 }
745
746 if (dif) { /* DIX/DIF Type 1, 2, 3 */
747 scmd->prot_flags |= SCSI_PROT_TRANSFER_PI;
748
749 if (bio_integrity_flagged(bio, BIP_DISK_NOCHECK))
750 protect = 3 << 5; /* Disable target PI checking */
751 else
752 protect = 1 << 5; /* Enable target PI checking */
35e1a5d9
MP		 753 }
754
755 scsi_set_prot_op(scmd, prot_op);
756 scsi_set_prot_type(scmd, dif);
c611529e
MP		 757 scmd->prot_flags &= sd_prot_flag_mask(prot_op);
758
759 return protect;
35e1a5d9
MP		 760}
761
c98a0eb0
MP		 762static void sd_config_discard(struct scsi_disk *sdkp, unsigned int mode)
763{
764 struct request_queue *q = sdkp->disk->queue;
765 unsigned int logical_block_size = sdkp->device->sector_size;
766 unsigned int max_blocks = 0;
767
bcd069bb
MP		 768 q->limits.discard_alignment =
769 sdkp->unmap_alignment * logical_block_size;
770 q->limits.discard_granularity =
771 max(sdkp->physical_block_size,
772 sdkp->unmap_granularity * logical_block_size);
89730393
MP		 773 sdkp->provisioning_mode = mode;
774
c98a0eb0
MP		 775 switch (mode) {
776
4c11712a 777 case SD_LBP_FULL:
c98a0eb0 778 case SD_LBP_DISABLE:
2bb4cd5c 779 blk_queue_max_discard_sectors(q, 0);
8b904b5b 780 blk_queue_flag_clear(QUEUE_FLAG_DISCARD, q);
c98a0eb0
MP		 781 return;
782
783 case SD_LBP_UNMAP:
5db44863
MP		 784 max_blocks = min_not_zero(sdkp->max_unmap_blocks,
785 (u32)SD_MAX_WS16_BLOCKS);
c98a0eb0
MP		 786 break;
787
788 case SD_LBP_WS16:
28a0bc41
MP		 789 if (sdkp->device->unmap_limit_for_ws)
790 max_blocks = sdkp->max_unmap_blocks;
791 else
792 max_blocks = sdkp->max_ws_blocks;
793
794 max_blocks = min_not_zero(max_blocks, (u32)SD_MAX_WS16_BLOCKS);
c98a0eb0
MP		 795 break;
796
797 case SD_LBP_WS10:
28a0bc41
MP		 798 if (sdkp->device->unmap_limit_for_ws)
799 max_blocks = sdkp->max_unmap_blocks;
800 else
801 max_blocks = sdkp->max_ws_blocks;
802
803 max_blocks = min_not_zero(max_blocks, (u32)SD_MAX_WS10_BLOCKS);
c98a0eb0
MP		 804 break;
805
806 case SD_LBP_ZERO:
5db44863
MP		 807 max_blocks = min_not_zero(sdkp->max_ws_blocks,
808 (u32)SD_MAX_WS10_BLOCKS);
c98a0eb0
MP		 809 break;
810 }
811
2bb4cd5c 812 blk_queue_max_discard_sectors(q, max_blocks * (logical_block_size >> 9));
8b904b5b 813 blk_queue_flag_set(QUEUE_FLAG_DISCARD, q);
c98a0eb0
MP		 814}
815
159b2cbf 816static blk_status_t sd_setup_unmap_cmnd(struct scsi_cmnd *cmd)
e339c1a7 817{
6a7b4398 818 struct scsi_device *sdp = cmd->device;
81d926e8
CH		 819 struct request *rq = cmd->request;
820 u64 sector = blk_rq_pos(rq) >> (ilog2(sdp->sector_size) - 9);
821 u32 nr_sectors = blk_rq_sectors(rq) >> (ilog2(sdp->sector_size) - 9);
822 unsigned int data_len = 24;
c98a0eb0 823 char *buf;
e339c1a7 824
61cce6f6 825 rq->special_vec.bv_page = mempool_alloc(sd_page_pool, GFP_ATOMIC);
81d926e8 826 if (!rq->special_vec.bv_page)
159b2cbf 827 return BLK_STS_RESOURCE;
61cce6f6 828 clear_highpage(rq->special_vec.bv_page);
81d926e8
CH		 829 rq->special_vec.bv_offset = 0;
830 rq->special_vec.bv_len = data_len;
831 rq->rq_flags |= RQF_SPECIAL_PAYLOAD;
66ac0280 832
81d926e8
CH		 833 cmd->cmd_len = 10;
834 cmd->cmnd[0] = UNMAP;
835 cmd->cmnd[8] = 24;
e339c1a7 836
81d926e8
CH		 837 buf = page_address(rq->special_vec.bv_page);
838 put_unaligned_be16(6 + 16, &buf[0]);
839 put_unaligned_be16(16, &buf[2]);
840 put_unaligned_be64(sector, &buf[8]);
841 put_unaligned_be32(nr_sectors, &buf[16]);
e339c1a7 842
81d926e8
CH		 843 cmd->allowed = SD_MAX_RETRIES;
844 cmd->transfersize = data_len;
845 rq->timeout = SD_TIMEOUT;
846 scsi_req(rq)->resid_len = data_len;
e339c1a7 847
81d926e8
CH		 848 return scsi_init_io(cmd);
849}
c98a0eb0 850
159b2cbf
CH		 851static blk_status_t sd_setup_write_same16_cmnd(struct scsi_cmnd *cmd,
852 bool unmap)
81d926e8
CH		 853{
854 struct scsi_device *sdp = cmd->device;
855 struct request *rq = cmd->request;
856 u64 sector = blk_rq_pos(rq) >> (ilog2(sdp->sector_size) - 9);
857 u32 nr_sectors = blk_rq_sectors(rq) >> (ilog2(sdp->sector_size) - 9);
858 u32 data_len = sdp->sector_size;
c98a0eb0 859
61cce6f6 860 rq->special_vec.bv_page = mempool_alloc(sd_page_pool, GFP_ATOMIC);
81d926e8 861 if (!rq->special_vec.bv_page)
159b2cbf 862 return BLK_STS_RESOURCE;
61cce6f6 863 clear_highpage(rq->special_vec.bv_page);
81d926e8
CH		 864 rq->special_vec.bv_offset = 0;
865 rq->special_vec.bv_len = data_len;
866 rq->rq_flags |= RQF_SPECIAL_PAYLOAD;
c98a0eb0 867
81d926e8
CH		 868 cmd->cmd_len = 16;
869 cmd->cmnd[0] = WRITE_SAME_16;
02d26103 870 if (unmap)
6a7b4398 871 cmd->cmnd[1] = 0x8; /* UNMAP */
81d926e8
CH		 872 put_unaligned_be64(sector, &cmd->cmnd[2]);
873 put_unaligned_be32(nr_sectors, &cmd->cmnd[10]);
66ac0280 874
81d926e8
CH		 875 cmd->allowed = SD_MAX_RETRIES;
876 cmd->transfersize = data_len;
02d26103 877 rq->timeout = unmap ? SD_TIMEOUT : SD_WRITE_SAME_TIMEOUT;
81d926e8 878 scsi_req(rq)->resid_len = data_len;
c98a0eb0 879
81d926e8
CH		 880 return scsi_init_io(cmd);
881}
c98a0eb0 882
159b2cbf
CH		 883static blk_status_t sd_setup_write_same10_cmnd(struct scsi_cmnd *cmd,
884 bool unmap)
81d926e8
CH		 885{
886 struct scsi_device *sdp = cmd->device;
887 struct request *rq = cmd->request;
888 u64 sector = blk_rq_pos(rq) >> (ilog2(sdp->sector_size) - 9);
889 u32 nr_sectors = blk_rq_sectors(rq) >> (ilog2(sdp->sector_size) - 9);
890 u32 data_len = sdp->sector_size;
c98a0eb0 891
61cce6f6 892 rq->special_vec.bv_page = mempool_alloc(sd_page_pool, GFP_ATOMIC);
81d926e8 893 if (!rq->special_vec.bv_page)
159b2cbf 894 return BLK_STS_RESOURCE;
61cce6f6 895 clear_highpage(rq->special_vec.bv_page);
81d926e8
CH		 896 rq->special_vec.bv_offset = 0;
897 rq->special_vec.bv_len = data_len;
f9d03f96 898 rq->rq_flags |= RQF_SPECIAL_PAYLOAD;
e339c1a7 899
81d926e8
CH		 900 cmd->cmd_len = 10;
901 cmd->cmnd[0] = WRITE_SAME;
902 if (unmap)
903 cmd->cmnd[1] = 0x8; /* UNMAP */
904 put_unaligned_be32(sector, &cmd->cmnd[2]);
905 put_unaligned_be16(nr_sectors, &cmd->cmnd[7]);
6a7b4398 906
e4200f8e 907 cmd->allowed = SD_MAX_RETRIES;
81d926e8 908 cmd->transfersize = data_len;
02d26103 909 rq->timeout = unmap ? SD_TIMEOUT : SD_WRITE_SAME_TIMEOUT;
81d926e8 910 scsi_req(rq)->resid_len = data_len;
6a7b4398 911
81d926e8 912 return scsi_init_io(cmd);
f1126e95 913}
f9d03f96 914
159b2cbf 915static blk_status_t sd_setup_write_zeroes_cmnd(struct scsi_cmnd *cmd)
02d26103
CH		 916{
917 struct request *rq = cmd->request;
918 struct scsi_device *sdp = cmd->device;
919 struct scsi_disk *sdkp = scsi_disk(rq->rq_disk);
920 u64 sector = blk_rq_pos(rq) >> (ilog2(sdp->sector_size) - 9);
921 u32 nr_sectors = blk_rq_sectors(rq) >> (ilog2(sdp->sector_size) - 9);
922
e4b87837 923 if (!(rq->cmd_flags & REQ_NOUNMAP)) {
e6bd9312
MP		 924 switch (sdkp->zeroing_mode) {
925 case SD_ZERO_WS16_UNMAP:
39051dd8 926 return sd_setup_write_same16_cmnd(cmd, true);
e6bd9312 927 case SD_ZERO_WS10_UNMAP:
39051dd8 928 return sd_setup_write_same10_cmnd(cmd, true);
e4b87837
CH		 929 }
930 }
c98a0eb0 931
02d26103 932 if (sdp->no_write_same)
159b2cbf 933 return BLK_STS_TARGET;
ed44fd7f 934
02d26103 935 if (sdkp->ws16 || sector > 0xffffffff || nr_sectors > 0xffff)
39051dd8 936 return sd_setup_write_same16_cmnd(cmd, false);
ed44fd7f 937
39051dd8 938 return sd_setup_write_same10_cmnd(cmd, false);
f1126e95
FT		 939}
940
5db44863
MP		 941static void sd_config_write_same(struct scsi_disk *sdkp)
942{
943 struct request_queue *q = sdkp->disk->queue;
944 unsigned int logical_block_size = sdkp->device->sector_size;
5db44863
MP		 945
946 if (sdkp->device->no_write_same) {
947 sdkp->max_ws_blocks = 0;
948 goto out;
949 }
950
951 /* Some devices can not handle block counts above 0xffff despite
952 * supporting WRITE SAME(16). Consequently we default to 64k
953 * blocks per I/O unless the device explicitly advertises a
954 * bigger limit.
955 */
66c28f97
MP		 956 if (sdkp->max_ws_blocks > SD_MAX_WS10_BLOCKS)
957 sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks,
958 (u32)SD_MAX_WS16_BLOCKS);
959 else if (sdkp->ws16 || sdkp->ws10 || sdkp->device->no_report_opcodes)
960 sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks,
961 (u32)SD_MAX_WS10_BLOCKS);
962 else {
963 sdkp->device->no_write_same = 1;
964 sdkp->max_ws_blocks = 0;
965 }
5db44863 966
e6bd9312
MP		 967 if (sdkp->lbprz && sdkp->lbpws)
968 sdkp->zeroing_mode = SD_ZERO_WS16_UNMAP;
969 else if (sdkp->lbprz && sdkp->lbpws10)
970 sdkp->zeroing_mode = SD_ZERO_WS10_UNMAP;
971 else if (sdkp->max_ws_blocks)
972 sdkp->zeroing_mode = SD_ZERO_WS;
973 else
974 sdkp->zeroing_mode = SD_ZERO_WRITE;
975
b7af62a9
DLM		 976 if (sdkp->max_ws_blocks &&
977 sdkp->physical_block_size > logical_block_size) {
978 /*
979 * Reporting a maximum number of blocks that is not aligned
980 * on the device physical size would cause a large write same
981 * request to be split into physically unaligned chunks by
982 * __blkdev_issue_write_zeroes() and __blkdev_issue_write_same()
983 * even if the caller of these functions took care to align the
984 * large request. So make sure the maximum reported is aligned
985 * to the device physical block size. This is only an optional
986 * optimization for regular disks, but this is mandatory to
987 * avoid failure of large write same requests directed at
988 * sequential write required zones of host-managed ZBC disks.
989 */
990 sdkp->max_ws_blocks =
991 round_down(sdkp->max_ws_blocks,
992 bytes_to_logical(sdkp->device,
993 sdkp->physical_block_size));
994 }
995
5db44863 996out:
66c28f97
MP		 997 blk_queue_max_write_same_sectors(q, sdkp->max_ws_blocks *
998 (logical_block_size >> 9));
02d26103
CH		 999 blk_queue_max_write_zeroes_sectors(q, sdkp->max_ws_blocks *
1000 (logical_block_size >> 9));
5db44863
MP		 1001}
1002
1003/**
1004 * sd_setup_write_same_cmnd - write the same data to multiple blocks
59b1134c 1005 * @cmd: command to prepare
5db44863 1006 *
7529fbb0
DLM		 1007 * Will set up either WRITE SAME(10) or WRITE SAME(16) depending on
1008 * the preference indicated by the target device.
5db44863 1009 **/
159b2cbf 1010static blk_status_t sd_setup_write_same_cmnd(struct scsi_cmnd *cmd)
5db44863 1011{
59b1134c
CH		 1012 struct request *rq = cmd->request;
1013 struct scsi_device *sdp = cmd->device;
5db44863
MP		 1014 struct scsi_disk *sdkp = scsi_disk(rq->rq_disk);
1015 struct bio *bio = rq->bio;
1016 sector_t sector = blk_rq_pos(rq);
1017 unsigned int nr_sectors = blk_rq_sectors(rq);
08965c2e 1018 unsigned int nr_bytes = blk_rq_bytes(rq);
159b2cbf 1019 blk_status_t ret;
5db44863
MP		 1020
1021 if (sdkp->device->no_write_same)
159b2cbf 1022 return BLK_STS_TARGET;
5db44863 1023
a4ad39b1 1024 BUG_ON(bio_offset(bio) || bio_iovec(bio).bv_len != sdp->sector_size);
5db44863
MP		 1025
1026 sector >>= ilog2(sdp->sector_size) - 9;
1027 nr_sectors >>= ilog2(sdp->sector_size) - 9;
1028
5db44863 1029 rq->timeout = SD_WRITE_SAME_TIMEOUT;
5db44863
MP		 1030
1031 if (sdkp->ws16 || sector > 0xffffffff || nr_sectors > 0xffff) {
59b1134c
CH		 1032 cmd->cmd_len = 16;
1033 cmd->cmnd[0] = WRITE_SAME_16;
1034 put_unaligned_be64(sector, &cmd->cmnd[2]);
1035 put_unaligned_be32(nr_sectors, &cmd->cmnd[10]);
5db44863 1036 } else {
59b1134c
CH		 1037 cmd->cmd_len = 10;
1038 cmd->cmnd[0] = WRITE_SAME;
1039 put_unaligned_be32(sector, &cmd->cmnd[2]);
1040 put_unaligned_be16(nr_sectors, &cmd->cmnd[7]);
5db44863
MP		 1041 }
1042
59b1134c 1043 cmd->transfersize = sdp->sector_size;
a25ee548 1044 cmd->allowed = SD_MAX_RETRIES;
08965c2e
BVA		 1045
1046 /*
1047 * For WRITE SAME the data transferred via the DATA OUT buffer is
1048 * different from the amount of data actually written to the target.
1049 *
1050 * We set up __data_len to the amount of data transferred via the
1051 * DATA OUT buffer so that blk_rq_map_sg sets up the proper S/G list
1052 * to transfer a single sector of data first, but then reset it to
1053 * the amount of data to be written right after so that the I/O path
1054 * knows how much to actually write.
1055 */
1056 rq->__data_len = sdp->sector_size;
1057 ret = scsi_init_io(cmd);
1058 rq->__data_len = nr_bytes;
29f6ca69 1059
08965c2e 1060 return ret;
5db44863
MP		 1061}
1062
159b2cbf 1063static blk_status_t sd_setup_flush_cmnd(struct scsi_cmnd *cmd)
90467c29 1064{
a118c6c1
CH		 1065 struct request *rq = cmd->request;
1066
1067 /* flush requests don't perform I/O, zero the S/G table */
1068 memset(&cmd->sdb, 0, sizeof(cmd->sdb));
90467c29 1069
a118c6c1
CH		 1070 cmd->cmnd[0] = SYNCHRONIZE_CACHE;
1071 cmd->cmd_len = 10;
1072 cmd->transfersize = 0;
1073 cmd->allowed = SD_MAX_RETRIES;
1074
26b9fd8b 1075 rq->timeout = rq->q->rq_timeout * SD_FLUSH_TIMEOUT_MULTIPLIER;
159b2cbf 1076 return BLK_STS_OK;
90467c29
FT		 1077}
1078
159b2cbf 1079static blk_status_t sd_setup_read_write_cmnd(struct scsi_cmnd *SCpnt)
1da177e4 1080{
a1b73fc1
CH		 1081 struct request *rq = SCpnt->request;
1082 struct scsi_device *sdp = SCpnt->device;
776b23a0 1083 struct gendisk *disk = rq->rq_disk;
89d94756 1084 struct scsi_disk *sdkp = scsi_disk(disk);
83096ebf 1085 sector_t block = blk_rq_pos(rq);
18351070 1086 sector_t threshold;
83096ebf 1087 unsigned int this_count = blk_rq_sectors(rq);
c611529e 1088 unsigned int dif, dix;
4e7392ec 1089 unsigned char protect;
159b2cbf 1090 blk_status_t ret;
7f9a6bc4 1091
3c356bde 1092 ret = scsi_init_io(SCpnt);
159b2cbf 1093 if (ret != BLK_STS_OK)
39051dd8 1094 return ret;
0624cbb1 1095 WARN_ON_ONCE(SCpnt != rq->special);
7f9a6bc4 1096
a1b73fc1
CH		 1097 SCSI_LOG_HLQUEUE(1,
1098 scmd_printk(KERN_INFO, SCpnt,
1099 "%s: block=%llu, count=%d\n",
1100 __func__, (unsigned long long)block, this_count));
1da177e4
LT		 1101
1102 if (!sdp || !scsi_device_online(sdp) ||
83096ebf 1103 block + blk_rq_sectors(rq) > get_capacity(disk)) {
fa0d34be 1104 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt,
83096ebf
TH		 1105 "Finishing %u sectors\n",
1106 blk_rq_sectors(rq)));
fa0d34be
MP		 1107 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt,
1108 "Retry with 0x%p\n", SCpnt));
159b2cbf 1109 return BLK_STS_IOERR;
1da177e4
LT		 1110 }
1111
1112 if (sdp->changed) {
1113 /*
1114 * quietly refuse to do anything to a changed disc until
1115 * the changed bit has been reset
1116 */
3ff5588d 1117 /* printk("SCSI disk has been changed or is not present. Prohibiting further I/O.\n"); */
159b2cbf 1118 return BLK_STS_IOERR;
1da177e4 1119 }
7f9a6bc4 1120
a0899d4d 1121 /*
18351070
LT		 1122 * Some SD card readers can't handle multi-sector accesses which touch
1123 * the last one or two hardware sectors. Split accesses as needed.
a0899d4d 1124 */
18351070
LT		 1125 threshold = get_capacity(disk) - SD_LAST_BUGGY_SECTORS *
1126 (sdp->sector_size / 512);
1127
1128 if (unlikely(sdp->last_sector_bug && block + this_count > threshold)) {
1129 if (block < threshold) {
1130 /* Access up to the threshold but not beyond */
1131 this_count = threshold - block;
1132 } else {
1133 /* Access only a single hardware sector */
1134 this_count = sdp->sector_size / 512;
1135 }
1136 }
a0899d4d 1137
fa0d34be
MP		 1138 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, "block=%llu\n",
1139 (unsigned long long)block));
1da177e4
LT		 1140
1141 /*
1142 * If we have a 1K hardware sectorsize, prevent access to single
1143 * 512 byte sectors. In theory we could handle this - in fact
1144 * the scsi cdrom driver must be able to handle this because
1145 * we typically use 1K blocksizes, and cdroms typically have
1146 * 2K hardware sectorsizes. Of course, things are simpler
1147 * with the cdrom, since it is read-only. For performance
1148 * reasons, the filesystems should be able to handle this
1149 * and not force the scsi disk driver to use bounce buffers
1150 * for this.
1151 */
1152 if (sdp->sector_size == 1024) {
83096ebf 1153 if ((block & 1) || (blk_rq_sectors(rq) & 1)) {
e73aec82
MP		 1154 scmd_printk(KERN_ERR, SCpnt,
1155 "Bad block number requested\n");
159b2cbf 1156 return BLK_STS_IOERR;
1da177e4 1157 }
159b2cbf
CH		 1158 block = block >> 1;
1159 this_count = this_count >> 1;
1da177e4
LT		 1160 }
1161 if (sdp->sector_size == 2048) {
83096ebf 1162 if ((block & 3) || (blk_rq_sectors(rq) & 3)) {
e73aec82
MP		 1163 scmd_printk(KERN_ERR, SCpnt,
1164 "Bad block number requested\n");
159b2cbf 1165 return BLK_STS_IOERR;
1da177e4 1166 }
159b2cbf
CH		 1167 block = block >> 2;
1168 this_count = this_count >> 2;
1da177e4
LT		 1169 }
1170 if (sdp->sector_size == 4096) {
83096ebf 1171 if ((block & 7) || (blk_rq_sectors(rq) & 7)) {
e73aec82
MP		 1172 scmd_printk(KERN_ERR, SCpnt,
1173 "Bad block number requested\n");
159b2cbf 1174 return BLK_STS_IOERR;
1da177e4 1175 }
159b2cbf
CH		 1176 block = block >> 3;
1177 this_count = this_count >> 3;
1da177e4
LT		 1178 }
1179 if (rq_data_dir(rq) == WRITE) {
1da177e4 1180 SCpnt->cmnd[0] = WRITE_6;
af55ff67 1181
8c579ab6 1182 if (blk_integrity_rq(rq))
10c41ddd 1183 t10_pi_prepare(SCpnt->request, sdkp->protection_type);
af55ff67 1184
1da177e4
LT		 1185 } else if (rq_data_dir(rq) == READ) {
1186 SCpnt->cmnd[0] = READ_6;
1da177e4 1187 } else {
ef295ecf 1188 scmd_printk(KERN_ERR, SCpnt, "Unknown command %d\n", req_op(rq));
159b2cbf 1189 return BLK_STS_IOERR;
1da177e4
LT		 1190 }
1191
fa0d34be 1192 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt,
83096ebf 1193 "%s %d/%u 512 byte blocks.\n",
fa0d34be
MP		 1194 (rq_data_dir(rq) == WRITE) ?
1195 "writing" : "reading", this_count,
83096ebf 1196 blk_rq_sectors(rq)));
1da177e4 1197
c611529e
MP		 1198 dix = scsi_prot_sg_count(SCpnt);
1199 dif = scsi_host_dif_capable(SCpnt->device->host, sdkp->protection_type);
1200
1201 if (dif || dix)
1202 protect = sd_setup_protect_cmnd(SCpnt, dix, dif);
af55ff67 1203 else
4e7392ec
MP		 1204 protect = 0;
1205
8475c811 1206 if (protect && sdkp->protection_type == T10_PI_TYPE2_PROTECTION) {
4e7392ec
MP		 1207 SCpnt->cmnd = mempool_alloc(sd_cdb_pool, GFP_ATOMIC);
1208
159b2cbf
CH		 1209 if (unlikely(!SCpnt->cmnd))
1210 return BLK_STS_RESOURCE;
af55ff67 1211
4e7392ec
MP		 1212 SCpnt->cmd_len = SD_EXT_CDB_SIZE;
1213 memset(SCpnt->cmnd, 0, SCpnt->cmd_len);
1214 SCpnt->cmnd[0] = VARIABLE_LENGTH_CMD;
1215 SCpnt->cmnd[7] = 0x18;
1216 SCpnt->cmnd[9] = (rq_data_dir(rq) == READ) ? READ_32 : WRITE_32;
33659ebb 1217 SCpnt->cmnd[10] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0);
4e7392ec
MP		 1218
1219 /* LBA */
1220 SCpnt->cmnd[12] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0;
1221 SCpnt->cmnd[13] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0;
1222 SCpnt->cmnd[14] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0;
1223 SCpnt->cmnd[15] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0;
1224 SCpnt->cmnd[16] = (unsigned char) (block >> 24) & 0xff;
1225 SCpnt->cmnd[17] = (unsigned char) (block >> 16) & 0xff;
1226 SCpnt->cmnd[18] = (unsigned char) (block >> 8) & 0xff;
1227 SCpnt->cmnd[19] = (unsigned char) block & 0xff;
1228
1229 /* Expected Indirect LBA */
1230 SCpnt->cmnd[20] = (unsigned char) (block >> 24) & 0xff;
1231 SCpnt->cmnd[21] = (unsigned char) (block >> 16) & 0xff;
1232 SCpnt->cmnd[22] = (unsigned char) (block >> 8) & 0xff;
1233 SCpnt->cmnd[23] = (unsigned char) block & 0xff;
1234
1235 /* Transfer length */
1236 SCpnt->cmnd[28] = (unsigned char) (this_count >> 24) & 0xff;
1237 SCpnt->cmnd[29] = (unsigned char) (this_count >> 16) & 0xff;
1238 SCpnt->cmnd[30] = (unsigned char) (this_count >> 8) & 0xff;
1239 SCpnt->cmnd[31] = (unsigned char) this_count & 0xff;
e430cbc8 1240 } else if (sdp->use_16_for_rw || (this_count > 0xffff)) {
1da177e4 1241 SCpnt->cmnd[0] += READ_16 - READ_6;
33659ebb 1242 SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0);
1da177e4
LT		 1243 SCpnt->cmnd[2] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0;
1244 SCpnt->cmnd[3] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0;
1245 SCpnt->cmnd[4] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0;
1246 SCpnt->cmnd[5] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0;
1247 SCpnt->cmnd[6] = (unsigned char) (block >> 24) & 0xff;
1248 SCpnt->cmnd[7] = (unsigned char) (block >> 16) & 0xff;
1249 SCpnt->cmnd[8] = (unsigned char) (block >> 8) & 0xff;
1250 SCpnt->cmnd[9] = (unsigned char) block & 0xff;
1251 SCpnt->cmnd[10] = (unsigned char) (this_count >> 24) & 0xff;
1252 SCpnt->cmnd[11] = (unsigned char) (this_count >> 16) & 0xff;
1253 SCpnt->cmnd[12] = (unsigned char) (this_count >> 8) & 0xff;
1254 SCpnt->cmnd[13] = (unsigned char) this_count & 0xff;
1255 SCpnt->cmnd[14] = SCpnt->cmnd[15] = 0;
1256 } else if ((this_count > 0xff) || (block > 0x1fffff) ||
af55ff67 1257 scsi_device_protection(SCpnt->device) ||
1da177e4 1258 SCpnt->device->use_10_for_rw) {
1da177e4 1259 SCpnt->cmnd[0] += READ_10 - READ_6;
33659ebb 1260 SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0);
1da177e4
LT		 1261 SCpnt->cmnd[2] = (unsigned char) (block >> 24) & 0xff;
1262 SCpnt->cmnd[3] = (unsigned char) (block >> 16) & 0xff;
1263 SCpnt->cmnd[4] = (unsigned char) (block >> 8) & 0xff;
1264 SCpnt->cmnd[5] = (unsigned char) block & 0xff;
1265 SCpnt->cmnd[6] = SCpnt->cmnd[9] = 0;
1266 SCpnt->cmnd[7] = (unsigned char) (this_count >> 8) & 0xff;
1267 SCpnt->cmnd[8] = (unsigned char) this_count & 0xff;
1268 } else {
33659ebb 1269 if (unlikely(rq->cmd_flags & REQ_FUA)) {
007365ad
TH		 1270 /*
1271 * This happens only if this drive failed
1272 * 10byte rw command with ILLEGAL_REQUEST
1273 * during operation and thus turned off
1274 * use_10_for_rw.
1275 */
e73aec82
MP		 1276 scmd_printk(KERN_ERR, SCpnt,
1277 "FUA write on READ/WRITE(6) drive\n");
159b2cbf 1278 return BLK_STS_IOERR;
007365ad
TH		 1279 }
1280
1da177e4
LT		 1281 SCpnt->cmnd[1] |= (unsigned char) ((block >> 16) & 0x1f);
1282 SCpnt->cmnd[2] = (unsigned char) ((block >> 8) & 0xff);
1283 SCpnt->cmnd[3] = (unsigned char) block & 0xff;
1284 SCpnt->cmnd[4] = (unsigned char) this_count;
1285 SCpnt->cmnd[5] = 0;
1286 }
30b0c37b 1287 SCpnt->sdb.length = this_count * sdp->sector_size;
1da177e4
LT		 1288
1289 /*
1290 * We shouldn't disconnect in the middle of a sector, so with a dumb
1291 * host adapter, it's safe to assume that we can at least transfer
1292 * this many bytes between each connect / disconnect.
1293 */
1294 SCpnt->transfersize = sdp->sector_size;
1295 SCpnt->underflow = this_count << 9;
1296 SCpnt->allowed = SD_MAX_RETRIES;
1da177e4 1297
1da177e4
LT		 1298 /*
1299 * This indicates that the command is ready from our end to be
1300 * queued.
1301 */
159b2cbf 1302 return BLK_STS_OK;
1da177e4
LT		 1303}
1304
159b2cbf 1305static blk_status_t sd_init_command(struct scsi_cmnd *cmd)
87949eee
CH		 1306{
1307 struct request *rq = cmd->request;
1308
c2df40df
MC		 1309 switch (req_op(rq)) {
1310 case REQ_OP_DISCARD:
81d926e8
CH		 1311 switch (scsi_disk(rq->rq_disk)->provisioning_mode) {
1312 case SD_LBP_UNMAP:
1313 return sd_setup_unmap_cmnd(cmd);
1314 case SD_LBP_WS16:
02d26103 1315 return sd_setup_write_same16_cmnd(cmd, true);
81d926e8
CH		 1316 case SD_LBP_WS10:
1317 return sd_setup_write_same10_cmnd(cmd, true);
1318 case SD_LBP_ZERO:
1319 return sd_setup_write_same10_cmnd(cmd, false);
1320 default:
159b2cbf 1321 return BLK_STS_TARGET;
81d926e8 1322 }
02d26103
CH		 1323 case REQ_OP_WRITE_ZEROES:
1324 return sd_setup_write_zeroes_cmnd(cmd);
c2df40df 1325 case REQ_OP_WRITE_SAME:
87949eee 1326 return sd_setup_write_same_cmnd(cmd);
3a5e02ce 1327 case REQ_OP_FLUSH:
87949eee 1328 return sd_setup_flush_cmnd(cmd);
c2df40df
MC		 1329 case REQ_OP_READ:
1330 case REQ_OP_WRITE:
87949eee 1331 return sd_setup_read_write_cmnd(cmd);
89d94756
HR		 1332 case REQ_OP_ZONE_RESET:
1333 return sd_zbc_setup_reset_cmnd(cmd);
c2df40df 1334 default:
f1f1fada 1335 WARN_ON_ONCE(1);
159b2cbf 1336 return BLK_STS_NOTSUPP;
c2df40df 1337 }
87949eee
CH		 1338}
1339
1340static void sd_uninit_command(struct scsi_cmnd *SCpnt)
1341{
1342 struct request *rq = SCpnt->request;
14e3062f 1343 u8 *cmnd;
87949eee 1344
f9d03f96 1345 if (rq->rq_flags & RQF_SPECIAL_PAYLOAD)
61cce6f6 1346 mempool_free(rq->special_vec.bv_page, sd_page_pool);
87949eee 1347
82ed4db4 1348 if (SCpnt->cmnd != scsi_req(rq)->cmd) {
14e3062f 1349 cmnd = SCpnt->cmnd;
87949eee
CH		 1350 SCpnt->cmnd = NULL;
1351 SCpnt->cmd_len = 0;
14e3062f 1352 mempool_free(cmnd, sd_cdb_pool);
87949eee
CH		 1353 }
1354}
1355
1da177e4
LT		 1356/**
1357 * sd_open - open a scsi disk device
7529fbb0
DLM		 1358 * @bdev: Block device of the scsi disk to open
1359 * @mode: FMODE_* mask
1da177e4
LT		 1360 *
1361 * Returns 0 if successful. Returns a negated errno value in case
1362 * of error.
1363 *
1364 * Note: This can be called from a user context (e.g. fsck(1) )
1365 * or from within the kernel (e.g. as a result of a mount(1) ).
1366 * In the latter case @inode and @filp carry an abridged amount
1367 * of information as noted above.
409f3499
AB		 1368 *
1369 * Locking: called with bdev->bd_mutex held.
1da177e4 1370 **/
0338e291 1371static int sd_open(struct block_device *bdev, fmode_t mode)
1da177e4 1372{
0338e291 1373 struct scsi_disk *sdkp = scsi_disk_get(bdev->bd_disk);
1da177e4
LT		 1374 struct scsi_device *sdev;
1375 int retval;
1376
0338e291 1377 if (!sdkp)
1da177e4
LT		 1378 return -ENXIO;
1379
fa0d34be 1380 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_open\n"));
1da177e4
LT		 1381
1382 sdev = sdkp->device;
1383
1384 /*
1385 * If the device is in error recovery, wait until it is done.
1386 * If the device is offline, then disallow any access to it.
1387 */
1388 retval = -ENXIO;
1389 if (!scsi_block_when_processing_errors(sdev))
1390 goto error_out;
1391
1392 if (sdev->removable || sdkp->write_prot)
0338e291 1393 check_disk_change(bdev);
1da177e4
LT		 1394
1395 /*
1396 * If the drive is empty, just let the open fail.
1397 */
1398 retval = -ENOMEDIUM;
0338e291 1399 if (sdev->removable && !sdkp->media_present && !(mode & FMODE_NDELAY))
1da177e4
LT		 1400 goto error_out;
1401
1402 /*
1403 * If the device has the write protect tab set, have the open fail
1404 * if the user expects to be able to write to the thing.
1405 */
1406 retval = -EROFS;
0338e291 1407 if (sdkp->write_prot && (mode & FMODE_WRITE))
1da177e4
LT		 1408 goto error_out;
1409
1410 /*
1411 * It is possible that the disk changing stuff resulted in
1412 * the device being taken offline. If this is the case,
1413 * report this to the user, and don't pretend that the
1414 * open actually succeeded.
1415 */
1416 retval = -ENXIO;
1417 if (!scsi_device_online(sdev))
1418 goto error_out;
1419
409f3499 1420 if ((atomic_inc_return(&sdkp->openers) == 1) && sdev->removable) {
1da177e4
LT		 1421 if (scsi_block_when_processing_errors(sdev))
1422 scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT);
1423 }
1424
1425 return 0;
1426
1427error_out:
1428 scsi_disk_put(sdkp);
1429 return retval;
1430}
1431
1432/**
1433 * sd_release - invoked when the (last) close(2) is called on this
1434 * scsi disk.
7529fbb0
DLM		 1435 * @disk: disk to release
1436 * @mode: FMODE_* mask
1da177e4
LT		 1437 *
1438 * Returns 0.
1439 *
1440 * Note: may block (uninterruptible) if error recovery is underway
1441 * on this disk.
409f3499
AB		 1442 *
1443 * Locking: called with bdev->bd_mutex held.
1da177e4 1444 **/
db2a144b 1445static void sd_release(struct gendisk *disk, fmode_t mode)
1da177e4 1446{
1da177e4
LT		 1447 struct scsi_disk *sdkp = scsi_disk(disk);
1448 struct scsi_device *sdev = sdkp->device;
1449
56937f7b 1450 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_release\n"));
1da177e4 1451
7e443312 1452 if (atomic_dec_return(&sdkp->openers) == 0 && sdev->removable) {
1da177e4
LT		 1453 if (scsi_block_when_processing_errors(sdev))
1454 scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW);
1455 }
1456
1457 /*
1458 * XXX and what if there are packets in flight and this close()
1459 * XXX is followed by a "rmmod sd_mod"?
1460 */
478a8a05 1461
1da177e4 1462 scsi_disk_put(sdkp);
1da177e4
LT		 1463}
1464
a885c8c4 1465static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1da177e4
LT		 1466{
1467 struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk);
1468 struct scsi_device *sdp = sdkp->device;
1469 struct Scsi_Host *host = sdp->host;
f08bb1e0 1470 sector_t capacity = logical_to_sectors(sdp, sdkp->capacity);
1da177e4
LT		 1471 int diskinfo[4];
1472
1473 /* default to most commonly used values */
f08bb1e0
MP		 1474 diskinfo[0] = 0x40; /* 1 << 6 */
1475 diskinfo[1] = 0x20; /* 1 << 5 */
1476 diskinfo[2] = capacity >> 11;
1477
1da177e4
LT		 1478 /* override with calculated, extended default, or driver values */
1479 if (host->hostt->bios_param)
f08bb1e0 1480 host->hostt->bios_param(sdp, bdev, capacity, diskinfo);
1da177e4 1481 else
f08bb1e0 1482 scsicam_bios_param(bdev, capacity, diskinfo);
1da177e4 1483
a885c8c4
CH		 1484 geo->heads = diskinfo[0];
1485 geo->sectors = diskinfo[1];
1486 geo->cylinders = diskinfo[2];
1da177e4
LT		 1487 return 0;
1488}
1489
1490/**
1491 * sd_ioctl - process an ioctl
7529fbb0
DLM		 1492 * @bdev: target block device
1493 * @mode: FMODE_* mask
1da177e4
LT		 1494 * @cmd: ioctl command number
1495 * @arg: this is third argument given to ioctl(2) system call.
1496 * Often contains a pointer.
1497 *
25985edc 1498 * Returns 0 if successful (some ioctls return positive numbers on
1da177e4
LT		 1499 * success as well). Returns a negated errno value in case of error.
1500 *
1501 * Note: most ioctls are forward onto the block subsystem or further
3a4fa0a2 1502 * down in the scsi subsystem.
1da177e4 1503 **/
0338e291 1504static int sd_ioctl(struct block_device *bdev, fmode_t mode,
1da177e4
LT		 1505 unsigned int cmd, unsigned long arg)
1506{
1da177e4 1507 struct gendisk *disk = bdev->bd_disk;
fe2d1851
NN		 1508 struct scsi_disk *sdkp = scsi_disk(disk);
1509 struct scsi_device *sdp = sdkp->device;
1da177e4
LT		 1510 void __user *p = (void __user *)arg;
1511 int error;
1512
fe2d1851
NN		 1513 SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO, sdkp, "sd_ioctl: disk=%s, "
1514 "cmd=0x%x\n", disk->disk_name, cmd));
1da177e4 1515
0bfc96cb
PB		 1516 error = scsi_verify_blk_ioctl(bdev, cmd);
1517 if (error < 0)
1518 return error;
1519
1da177e4
LT		 1520 /*
1521 * If we are in the middle of error recovery, don't let anyone
1522 * else try and use this device. Also, if error recovery fails, it
1523 * may try and take the device offline, in which case all further
1524 * access to the device is prohibited.
1525 */
906d15fb
CH		 1526 error = scsi_ioctl_block_when_processing_errors(sdp, cmd,
1527 (mode & FMODE_NDELAY) != 0);
1528 if (error)
8a6cfeb6 1529 goto out;
1da177e4 1530
d80210f2
CH		 1531 if (is_sed_ioctl(cmd))
1532 return sed_ioctl(sdkp->opal_dev, cmd, p);
1533
1da177e4
LT		 1534 /*
1535 * Send SCSI addressing ioctls directly to mid level, send other
1536 * ioctls to block level and then onto mid level if they can't be
1537 * resolved.
1538 */
1539 switch (cmd) {
1540 case SCSI_IOCTL_GET_IDLUN:
1541 case SCSI_IOCTL_GET_BUS_NUMBER:
8a6cfeb6
AB		 1542 error = scsi_ioctl(sdp, cmd, p);
1543 break;
1da177e4 1544 default:
577ebb37 1545 error = scsi_cmd_blk_ioctl(bdev, mode, cmd, p);
1da177e4 1546 if (error != -ENOTTY)
8a6cfeb6
AB		 1547 break;
1548 error = scsi_ioctl(sdp, cmd, p);
1549 break;
1da177e4 1550 }
8a6cfeb6 1551out:
8a6cfeb6 1552 return error;
1da177e4
LT		 1553}
1554
1555static void set_media_not_present(struct scsi_disk *sdkp)
1556{
2bae0093
TH		 1557 if (sdkp->media_present)
1558 sdkp->device->changed = 1;
1559
1560 if (sdkp->device->removable) {
1561 sdkp->media_present = 0;
1562 sdkp->capacity = 0;
1563 }
1564}
1565
1566static int media_not_present(struct scsi_disk *sdkp,
1567 struct scsi_sense_hdr *sshdr)
1568{
1569 if (!scsi_sense_valid(sshdr))
1570 return 0;
1571
1572 /* not invoked for commands that could return deferred errors */
1573 switch (sshdr->sense_key) {
1574 case UNIT_ATTENTION:
1575 case NOT_READY:
1576 /* medium not present */
1577 if (sshdr->asc == 0x3A) {
1578 set_media_not_present(sdkp);
1579 return 1;
1580 }
1581 }
1582 return 0;
1da177e4
LT		 1583}
1584
1585/**
2bae0093
TH		 1586 * sd_check_events - check media events
1587 * @disk: kernel device descriptor
1588 * @clearing: disk events currently being cleared
1da177e4 1589 *
2bae0093 1590 * Returns mask of DISK_EVENT_*.
1da177e4
LT		 1591 *
1592 * Note: this function is invoked from the block subsystem.
1593 **/
2bae0093 1594static unsigned int sd_check_events(struct gendisk *disk, unsigned int clearing)
1da177e4 1595{
eb72d0bb
HR		 1596 struct scsi_disk *sdkp = scsi_disk_get(disk);
1597 struct scsi_device *sdp;
1da177e4
LT		 1598 int retval;
1599
eb72d0bb
HR		 1600 if (!sdkp)
1601 return 0;
1602
1603 sdp = sdkp->device;
2bae0093 1604 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_check_events\n"));
1da177e4
LT		 1605
1606 /*
1607 * If the device is offline, don't send any commands - just pretend as
1608 * if the command failed. If the device ever comes back online, we
1609 * can deal with it then. It is only because of unrecoverable errors
1610 * that we would ever take a device offline in the first place.
1611 */
285e9670
KS		 1612 if (!scsi_device_online(sdp)) {
1613 set_media_not_present(sdkp);
285e9670
KS		 1614 goto out;
1615 }
1da177e4
LT		 1616
1617 /*
1618 * Using TEST_UNIT_READY enables differentiation between drive with
1619 * no cartridge loaded - NOT READY, drive with changed cartridge -
1620 * UNIT ATTENTION, or with same cartridge - GOOD STATUS.
1621 *
1622 * Drives that auto spin down. eg iomega jaz 1G, will be started
1623 * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever
1624 * sd_revalidate() is called.
1625 */
001aac25 1626 if (scsi_block_when_processing_errors(sdp)) {
6fa2b8f9
CH		 1627 struct scsi_sense_hdr sshdr = { 0, };
1628
001aac25 1629 retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, SD_MAX_RETRIES,
6fa2b8f9 1630 &sshdr);
1da177e4 1631
6fa2b8f9
CH		 1632 /* failed to execute TUR, assume media not present */
1633 if (host_byte(retval)) {
1634 set_media_not_present(sdkp);
1635 goto out;
1636 }
1da177e4 1637
6fa2b8f9
CH		 1638 if (media_not_present(sdkp, &sshdr))
1639 goto out;
1640 }
2bae0093 1641
1da177e4
LT		 1642 /*
1643 * For removable scsi disk we have to recognise the presence
2bae0093 1644 * of a disk in the drive.
1da177e4 1645 */
2bae0093
TH		 1646 if (!sdkp->media_present)
1647 sdp->changed = 1;
1da177e4 1648 sdkp->media_present = 1;
285e9670 1649out:
3ff5588d 1650 /*
2bae0093 1651 * sdp->changed is set under the following conditions:
3ff5588d 1652 *
2bae0093
TH		 1653 * Medium present state has changed in either direction.
1654 * Device has indicated UNIT_ATTENTION.
3ff5588d 1655 */
2bae0093
TH		 1656 retval = sdp->changed ? DISK_EVENT_MEDIA_CHANGE : 0;
1657 sdp->changed = 0;
eb72d0bb 1658 scsi_disk_put(sdkp);
1da177e4 1659 return retval;
1da177e4
LT		 1660}
1661
4fa83244 1662static int sd_sync_cache(struct scsi_disk *sdkp, struct scsi_sense_hdr *sshdr)
1da177e4 1663{
1da177e4 1664 int retries, res;
e73aec82 1665 struct scsi_device *sdp = sdkp->device;
7e660100
JB		 1666 const int timeout = sdp->request_queue->rq_timeout
1667 * SD_FLUSH_TIMEOUT_MULTIPLIER;
4fa83244 1668 struct scsi_sense_hdr my_sshdr;
1da177e4
LT		 1669
1670 if (!scsi_device_online(sdp))
1671 return -ENODEV;
1672
4fa83244
DB		 1673 /* caller might not be interested in sense, but we need it */
1674 if (!sshdr)
1675 sshdr = &my_sshdr;
1676
1da177e4
LT		 1677 for (retries = 3; retries > 0; --retries) {
1678 unsigned char cmd[10] = { 0 };
1679
1680 cmd[0] = SYNCHRONIZE_CACHE;
1681 /*
1682 * Leave the rest of the command zero to indicate
1683 * flush everything.
1684 */
4fa83244 1685 res = scsi_execute(sdp, cmd, DMA_NONE, NULL, 0, NULL, sshdr,
fcbfffe2 1686 timeout, SD_MAX_RETRIES, 0, RQF_PM, NULL);
ea73a9f2 1687 if (res == 0)
1da177e4
LT		 1688 break;
1689 }
1690
e73aec82 1691 if (res) {
ef61329d 1692 sd_print_result(sdkp, "Synchronize Cache(10) failed", res);
95897910 1693
c65be1a6 1694 if (driver_byte(res) == DRIVER_SENSE)
4fa83244
DB		 1695 sd_print_sense_hdr(sdkp, sshdr);
1696
95897910 1697 /* we need to evaluate the error return */
4fa83244
DB		 1698 if (scsi_sense_valid(sshdr) &&
1699 (sshdr->asc == 0x3a || /* medium not present */
1700 sshdr->asc == 0x20)) /* invalid command */
95897910
ON		 1701 /* this is no error here */
1702 return 0;
1703
1704 switch (host_byte(res)) {
1705 /* ignore errors due to racing a disconnection */
1706 case DID_BAD_TARGET:
1707 case DID_NO_CONNECT:
1708 return 0;
1709 /* signal the upper layer it might try again */
1710 case DID_BUS_BUSY:
1711 case DID_IMM_RETRY:
1712 case DID_REQUEUE:
1713 case DID_SOFT_ERROR:
1714 return -EBUSY;
1715 default:
1716 return -EIO;
1717 }
1da177e4 1718 }
3721050a 1719 return 0;
1da177e4
LT		 1720}
1721
1da177e4
LT		 1722static void sd_rescan(struct device *dev)
1723{
3d9a1f53 1724 struct scsi_disk *sdkp = dev_get_drvdata(dev);
39b7f1e2 1725
3d9a1f53 1726 revalidate_disk(sdkp->disk);
1da177e4
LT		 1727}
1728
1729
1730#ifdef CONFIG_COMPAT
1731/*
1732 * This gets directly called from VFS. When the ioctl
1733 * is not recognized we go back to the other translation paths.
1734 */
0338e291
AV		 1735static int sd_compat_ioctl(struct block_device *bdev, fmode_t mode,
1736 unsigned int cmd, unsigned long arg)
1da177e4 1737{
0338e291 1738 struct scsi_device *sdev = scsi_disk(bdev->bd_disk)->device;
21a9d4c9 1739 int error;
1da177e4 1740
21a9d4c9
CH		 1741 error = scsi_ioctl_block_when_processing_errors(sdev, cmd,
1742 (mode & FMODE_NDELAY) != 0);
1743 if (error)
1744 return error;
1da177e4 1745
1da177e4
LT		 1746 /*
1747 * Let the static ioctl translation table take care of it.
1748 */
21a9d4c9
CH		 1749 if (!sdev->host->hostt->compat_ioctl)
1750 return -ENOIOCTLCMD;
1751 return sdev->host->hostt->compat_ioctl(sdev, cmd, (void __user *)arg);
1da177e4
LT		 1752}
1753#endif
1754
924d55b0
CH		 1755static char sd_pr_type(enum pr_type type)
1756{
1757 switch (type) {
1758 case PR_WRITE_EXCLUSIVE:
1759 return 0x01;
1760 case PR_EXCLUSIVE_ACCESS:
1761 return 0x03;
1762 case PR_WRITE_EXCLUSIVE_REG_ONLY:
1763 return 0x05;
1764 case PR_EXCLUSIVE_ACCESS_REG_ONLY:
1765 return 0x06;
1766 case PR_WRITE_EXCLUSIVE_ALL_REGS:
1767 return 0x07;
1768 case PR_EXCLUSIVE_ACCESS_ALL_REGS:
1769 return 0x08;
1770 default:
1771 return 0;
1772 }
1773};
1774
1775static int sd_pr_command(struct block_device *bdev, u8 sa,
1776 u64 key, u64 sa_key, u8 type, u8 flags)
1777{
1778 struct scsi_device *sdev = scsi_disk(bdev->bd_disk)->device;
1779 struct scsi_sense_hdr sshdr;
1780 int result;
1781 u8 cmd[16] = { 0, };
1782 u8 data[24] = { 0, };
1783
1784 cmd[0] = PERSISTENT_RESERVE_OUT;
1785 cmd[1] = sa;
1786 cmd[2] = type;
1787 put_unaligned_be32(sizeof(data), &cmd[5]);
1788
1789 put_unaligned_be64(key, &data[0]);
1790 put_unaligned_be64(sa_key, &data[8]);
1791 data[20] = flags;
1792
1793 result = scsi_execute_req(sdev, cmd, DMA_TO_DEVICE, &data, sizeof(data),
1794 &sshdr, SD_TIMEOUT, SD_MAX_RETRIES, NULL);
1795
c65be1a6
JT		 1796 if (driver_byte(result) == DRIVER_SENSE &&
1797 scsi_sense_valid(&sshdr)) {
924d55b0
CH		 1798 sdev_printk(KERN_INFO, sdev, "PR command failed: %d\n", result);
1799 scsi_print_sense_hdr(sdev, NULL, &sshdr);
1800 }
1801
1802 return result;
1803}
1804
1805static int sd_pr_register(struct block_device *bdev, u64 old_key, u64 new_key,
1806 u32 flags)
1807{
1808 if (flags & ~PR_FL_IGNORE_KEY)
1809 return -EOPNOTSUPP;
1810 return sd_pr_command(bdev, (flags & PR_FL_IGNORE_KEY) ? 0x06 : 0x00,
1811 old_key, new_key, 0,
01f90dd9 1812 (1 << 0) /* APTPL */);
924d55b0
CH		 1813}
1814
1815static int sd_pr_reserve(struct block_device *bdev, u64 key, enum pr_type type,
1816 u32 flags)
1817{
1818 if (flags)
1819 return -EOPNOTSUPP;
1820 return sd_pr_command(bdev, 0x01, key, 0, sd_pr_type(type), 0);
1821}
1822
1823static int sd_pr_release(struct block_device *bdev, u64 key, enum pr_type type)
1824{
1825 return sd_pr_command(bdev, 0x02, key, 0, sd_pr_type(type), 0);
1826}
1827
1828static int sd_pr_preempt(struct block_device *bdev, u64 old_key, u64 new_key,
1829 enum pr_type type, bool abort)
1830{
1831 return sd_pr_command(bdev, abort ? 0x05 : 0x04, old_key, new_key,
1832 sd_pr_type(type), 0);
1833}
1834
1835static int sd_pr_clear(struct block_device *bdev, u64 key)
1836{
1837 return sd_pr_command(bdev, 0x03, key, 0, 0, 0);
1838}
1839
1840static const struct pr_ops sd_pr_ops = {
1841 .pr_register = sd_pr_register,
1842 .pr_reserve = sd_pr_reserve,
1843 .pr_release = sd_pr_release,
1844 .pr_preempt = sd_pr_preempt,
1845 .pr_clear = sd_pr_clear,
1846};
1847
83d5cde4 1848static const struct block_device_operations sd_fops = {
1da177e4 1849 .owner = THIS_MODULE,
0338e291
AV		 1850 .open = sd_open,
1851 .release = sd_release,
8a6cfeb6 1852 .ioctl = sd_ioctl,
a885c8c4 1853 .getgeo = sd_getgeo,
1da177e4 1854#ifdef CONFIG_COMPAT
0338e291 1855 .compat_ioctl = sd_compat_ioctl,
1da177e4 1856#endif
2bae0093 1857 .check_events = sd_check_events,
1da177e4 1858 .revalidate_disk = sd_revalidate_disk,
72ec24bd 1859 .unlock_native_capacity = sd_unlock_native_capacity,
e76239a3 1860 .report_zones = sd_zbc_report_zones,
924d55b0 1861 .pr_ops = &sd_pr_ops,
1da177e4
LT		 1862};
1863
7a38dc0b
HR		 1864/**
1865 * sd_eh_reset - reset error handling callback
1866 * @scmd: sd-issued command that has failed
1867 *
1868 * This function is called by the SCSI midlayer before starting
1869 * SCSI EH. When counting medium access failures we have to be
1870 * careful to register it only only once per device and SCSI EH run;
1871 * there might be several timed out commands which will cause the
1872 * 'max_medium_access_timeouts' counter to trigger after the first
1873 * SCSI EH run already and set the device to offline.
1874 * So this function resets the internal counter before starting SCSI EH.
1875 **/
1876static void sd_eh_reset(struct scsi_cmnd *scmd)
1877{
1878 struct scsi_disk *sdkp = scsi_disk(scmd->request->rq_disk);
1879
1880 /* New SCSI EH run, reset gate variable */
1881 sdkp->ignore_medium_access_errors = false;
1882}
1883
18a4d0a2
MP		 1884/**
1885 * sd_eh_action - error handling callback
1886 * @scmd: sd-issued command that has failed
18a4d0a2
MP		 1887 * @eh_disp: The recovery disposition suggested by the midlayer
1888 *
2451079b
JB		 1889 * This function is called by the SCSI midlayer upon completion of an
1890 * error test command (currently TEST UNIT READY). The result of sending
1891 * the eh command is passed in eh_disp. We're looking for devices that
1892 * fail medium access commands but are OK with non access commands like
1893 * test unit ready (so wrongly see the device as having a successful
1894 * recovery)
18a4d0a2 1895 **/
2451079b 1896static int sd_eh_action(struct scsi_cmnd *scmd, int eh_disp)
18a4d0a2
MP		 1897{
1898 struct scsi_disk *sdkp = scsi_disk(scmd->request->rq_disk);
0db6ca8a 1899 struct scsi_device *sdev = scmd->device;
18a4d0a2 1900
0db6ca8a 1901 if (!scsi_device_online(sdev) ||
2451079b
JB		 1902 !scsi_medium_access_command(scmd) ||
1903 host_byte(scmd->result) != DID_TIME_OUT ||
1904 eh_disp != SUCCESS)
18a4d0a2
MP		 1905 return eh_disp;
1906
1907 /*
1908 * The device has timed out executing a medium access command.
1909 * However, the TEST UNIT READY command sent during error
1910 * handling completed successfully. Either the device is in the
1911 * process of recovering or has it suffered an internal failure
1912 * that prevents access to the storage medium.
1913 */
7a38dc0b
HR		 1914 if (!sdkp->ignore_medium_access_errors) {
1915 sdkp->medium_access_timed_out++;
1916 sdkp->ignore_medium_access_errors = true;
1917 }
18a4d0a2
MP		 1918
1919 /*
1920 * If the device keeps failing read/write commands but TEST UNIT
1921 * READY always completes successfully we assume that medium
1922 * access is no longer possible and take the device offline.
1923 */
1924 if (sdkp->medium_access_timed_out >= sdkp->max_medium_access_timeouts) {
1925 scmd_printk(KERN_ERR, scmd,
1926 "Medium access timeout failure. Offlining disk!\n");
0db6ca8a
BVA		 1927 mutex_lock(&sdev->state_mutex);
1928 scsi_device_set_state(sdev, SDEV_OFFLINE);
1929 mutex_unlock(&sdev->state_mutex);
18a4d0a2 1930
e8f8d50e 1931 return SUCCESS;
18a4d0a2
MP		 1932 }
1933
1934 return eh_disp;
1935}
1936
af55ff67
MP		 1937static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd)
1938{
6eadc612
DLM		 1939 struct request *req = scmd->request;
1940 struct scsi_device *sdev = scmd->device;
1941 unsigned int transferred, good_bytes;
1942 u64 start_lba, end_lba, bad_lba;
1943
a8733c7b 1944 /*
6eadc612
DLM		 1945 * Some commands have a payload smaller than the device logical
1946 * block size (e.g. INQUIRY on a 4K disk).
a8733c7b 1947 */
6eadc612 1948 if (scsi_bufflen(scmd) <= sdev->sector_size)
af55ff67
MP		 1949 return 0;
1950
6eadc612
DLM		 1951 /* Check if we have a 'bad_lba' information */
1952 if (!scsi_get_sense_info_fld(scmd->sense_buffer,
1953 SCSI_SENSE_BUFFERSIZE,
1954 &bad_lba))
af55ff67
MP		 1955 return 0;
1956
6eadc612
DLM		 1957 /*
1958 * If the bad lba was reported incorrectly, we have no idea where
af55ff67
MP		 1959 * the error is.
1960 */
6eadc612
DLM		 1961 start_lba = sectors_to_logical(sdev, blk_rq_pos(req));
1962 end_lba = start_lba + bytes_to_logical(sdev, scsi_bufflen(scmd));
1963 if (bad_lba < start_lba || bad_lba >= end_lba)
af55ff67
MP		 1964 return 0;
1965
6eadc612
DLM		 1966 /*
1967 * resid is optional but mostly filled in. When it's unused,
1968 * its value is zero, so we assume the whole buffer transferred
af55ff67 1969 */
6eadc612
DLM		 1970 transferred = scsi_bufflen(scmd) - scsi_get_resid(scmd);
1971
1972 /* This computation should always be done in terms of the
1973 * resolution of the device's medium.
af55ff67 1974 */
6eadc612
DLM		 1975 good_bytes = logical_to_bytes(sdev, bad_lba - start_lba);
1976
a8733c7b 1977 return min(good_bytes, transferred);
af55ff67
MP		 1978}
1979
1da177e4 1980/**
7b3d9545 1981 * sd_done - bottom half handler: called when the lower level
1da177e4
LT		 1982 * driver has completed (successfully or otherwise) a scsi command.
1983 * @SCpnt: mid-level's per command structure.
1984 *
1985 * Note: potentially run from within an ISR. Must not block.
1986 **/
7b3d9545 1987static int sd_done(struct scsi_cmnd *SCpnt)
1da177e4
LT		 1988{
1989 int result = SCpnt->result;
af55ff67 1990 unsigned int good_bytes = result ? 0 : scsi_bufflen(SCpnt);
c46f0917
DLM		 1991 unsigned int sector_size = SCpnt->device->sector_size;
1992 unsigned int resid;
1da177e4 1993 struct scsi_sense_hdr sshdr;
4e7392ec 1994 struct scsi_disk *sdkp = scsi_disk(SCpnt->request->rq_disk);
26e85fcd 1995 struct request *req = SCpnt->request;
1da177e4
LT		 1996 int sense_valid = 0;
1997 int sense_deferred = 0;
1da177e4 1998
89d94756
HR		 1999 switch (req_op(req)) {
2000 case REQ_OP_DISCARD:
02d26103 2001 case REQ_OP_WRITE_ZEROES:
89d94756
HR		 2002 case REQ_OP_WRITE_SAME:
2003 case REQ_OP_ZONE_RESET:
26e85fcd
MP		 2004 if (!result) {
2005 good_bytes = blk_rq_bytes(req);
2006 scsi_set_resid(SCpnt, 0);
2007 } else {
2008 good_bytes = 0;
2009 scsi_set_resid(SCpnt, blk_rq_bytes(req));
89d94756
HR		 2010 }
2011 break;
c46f0917
DLM		 2012 default:
2013 /*
2014 * In case of bogus fw or device, we could end up having
2015 * an unaligned partial completion. Check this here and force
2016 * alignment.
2017 */
2018 resid = scsi_get_resid(SCpnt);
2019 if (resid & (sector_size - 1)) {
2020 sd_printk(KERN_INFO, sdkp,
2021 "Unaligned partial completion (resid=%u, sector_sz=%u)\n",
2022 resid, sector_size);
2023 resid = min(scsi_bufflen(SCpnt),
2024 round_up(resid, sector_size));
2025 scsi_set_resid(SCpnt, resid);
2026 }
26e85fcd 2027 }
6a32a8ae 2028
1da177e4
LT		 2029 if (result) {
2030 sense_valid = scsi_command_normalize_sense(SCpnt, &sshdr);
2031 if (sense_valid)
2032 sense_deferred = scsi_sense_is_deferred(&sshdr);
2033 }
2a863ba8
DJ		 2034 sdkp->medium_access_timed_out = 0;
2035
03aba2f7
LT		 2036 if (driver_byte(result) != DRIVER_SENSE &&
2037 (!sense_valid || sense_deferred))
2038 goto out;
2039
2040 switch (sshdr.sense_key) {
2041 case HARDWARE_ERROR:
2042 case MEDIUM_ERROR:
af55ff67 2043 good_bytes = sd_completed_bytes(SCpnt);
03aba2f7
LT		 2044 break;
2045 case RECOVERED_ERROR:
af55ff67
MP		 2046 good_bytes = scsi_bufflen(SCpnt);
2047 break;
10dab226
JW		 2048 case NO_SENSE:
2049 /* This indicates a false check condition, so ignore it. An
2050 * unknown amount of data was transferred so treat it as an
2051 * error.
2052 */
10dab226
JW		 2053 SCpnt->result = 0;
2054 memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
2055 break;
c98a0eb0
MP		 2056 case ABORTED_COMMAND:
2057 if (sshdr.asc == 0x10) /* DIF: Target detected corruption */
2058 good_bytes = sd_completed_bytes(SCpnt);
2059 break;
2060 case ILLEGAL_REQUEST:
d227ec26
CH		 2061 switch (sshdr.asc) {
2062 case 0x10: /* DIX: Host detected corruption */
af55ff67 2063 good_bytes = sd_completed_bytes(SCpnt);
d227ec26
CH		 2064 break;
2065 case 0x20: /* INVALID COMMAND OPCODE */
2066 case 0x24: /* INVALID FIELD IN CDB */
2067 switch (SCpnt->cmnd[0]) {
5db44863
MP		 2068 case UNMAP:
2069 sd_config_discard(sdkp, SD_LBP_DISABLE);
2070 break;
2071 case WRITE_SAME_16:
2072 case WRITE_SAME:
d227ec26 2073 if (SCpnt->cmnd[1] & 8) { /* UNMAP */
5db44863 2074 sd_config_discard(sdkp, SD_LBP_DISABLE);
d227ec26 2075 } else {
5db44863
MP		 2076 sdkp->device->no_write_same = 1;
2077 sd_config_write_same(sdkp);
e8064021 2078 req->rq_flags |= RQF_QUIET;
5db44863 2079 }
d227ec26 2080 break;
5db44863
MP		 2081 }
2082 }
03aba2f7
LT		 2083 break;
2084 default:
2085 break;
1da177e4 2086 }
89d94756 2087
03aba2f7 2088 out:
89d94756
HR		 2089 if (sd_is_zoned(sdkp))
2090 sd_zbc_complete(SCpnt, good_bytes, &sshdr);
2091
ef61329d
HR		 2092 SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO, SCpnt,
2093 "sd_done: completed %d of %d bytes\n",
2094 good_bytes, scsi_bufflen(SCpnt)));
2095
10c41ddd
MG		 2096 if (rq_data_dir(SCpnt->request) == READ && scsi_prot_sg_count(SCpnt) &&
2097 good_bytes)
2098 t10_pi_complete(SCpnt->request, sdkp->protection_type,
2099 good_bytes / scsi_prot_interval(SCpnt));
af55ff67 2100
7b3d9545 2101 return good_bytes;
1da177e4
LT		 2102}
2103
1da177e4
LT		 2104/*
2105 * spinup disk - called only in sd_revalidate_disk()
2106 */
2107static void
e73aec82 2108sd_spinup_disk(struct scsi_disk *sdkp)
ea73a9f2 2109{
1da177e4 2110 unsigned char cmd[10];
4451e472 2111 unsigned long spintime_expire = 0;
1da177e4
LT		 2112 int retries, spintime;
2113 unsigned int the_result;
2114 struct scsi_sense_hdr sshdr;
2115 int sense_valid = 0;
2116
2117 spintime = 0;
2118
2119 /* Spin up drives, as required. Only do this at boot time */
2120 /* Spinup needs to be done for module loads too. */
2121 do {
2122 retries = 0;
2123
2124 do {
2125 cmd[0] = TEST_UNIT_READY;
2126 memset((void *) &cmd[1], 0, 9);
2127
ea73a9f2
JB		 2128 the_result = scsi_execute_req(sdkp->device, cmd,
2129 DMA_NONE, NULL, 0,
2130 &sshdr, SD_TIMEOUT,
f4f4e47e 2131 SD_MAX_RETRIES, NULL);
1da177e4 2132
b4d38e38
AS		 2133 /*
2134 * If the drive has indicated to us that it
2135 * doesn't have any media in it, don't bother
2136 * with any more polling.
2137 */
2138 if (media_not_present(sdkp, &sshdr))
2139 return;
2140
1da177e4 2141 if (the_result)
ea73a9f2 2142 sense_valid = scsi_sense_valid(&sshdr);
1da177e4
LT		 2143 retries++;
2144 } while (retries < 3 &&
2145 (!scsi_status_is_good(the_result) ||
c65be1a6 2146 ((driver_byte(the_result) == DRIVER_SENSE) &&
1da177e4
LT		 2147 sense_valid && sshdr.sense_key == UNIT_ATTENTION)));
2148
c65be1a6 2149 if (driver_byte(the_result) != DRIVER_SENSE) {
1da177e4
LT		 2150 /* no sense, TUR either succeeded or failed
2151 * with a status error */
e73aec82 2152 if(!spintime && !scsi_status_is_good(the_result)) {
ef61329d
HR		 2153 sd_print_result(sdkp, "Test Unit Ready failed",
2154 the_result);
e73aec82 2155 }
1da177e4
LT		 2156 break;
2157 }
ef61329d 2158
1da177e4
LT		 2159 /*
2160 * The device does not want the automatic start to be issued.
2161 */
33dd6f92 2162 if (sdkp->device->no_start_on_add)
1da177e4 2163 break;
1da177e4 2164
33dd6f92
MW		 2165 if (sense_valid && sshdr.sense_key == NOT_READY) {
2166 if (sshdr.asc == 4 && sshdr.ascq == 3)
2167 break; /* manual intervention required */
2168 if (sshdr.asc == 4 && sshdr.ascq == 0xb)
2169 break; /* standby */
2170 if (sshdr.asc == 4 && sshdr.ascq == 0xc)
2171 break; /* unavailable */
505aa4b6
MR		 2172 if (sshdr.asc == 4 && sshdr.ascq == 0x1b)
2173 break; /* sanitize in progress */
33dd6f92
MW		 2174 /*
2175 * Issue command to spin up drive when not ready
2176 */
1da177e4 2177 if (!spintime) {
e73aec82 2178 sd_printk(KERN_NOTICE, sdkp, "Spinning up disk...");
1da177e4
LT		 2179 cmd[0] = START_STOP;
2180 cmd[1] = 1; /* Return immediately */
2181 memset((void *) &cmd[2], 0, 8);
2182 cmd[4] = 1; /* Start spin cycle */
d2886ea3
SR		 2183 if (sdkp->device->start_stop_pwr_cond)
2184 cmd[4] |= 1 << 4;
ea73a9f2
JB		 2185 scsi_execute_req(sdkp->device, cmd, DMA_NONE,
2186 NULL, 0, &sshdr,
f4f4e47e
FT		 2187 SD_TIMEOUT, SD_MAX_RETRIES,
2188 NULL);
4451e472
AS		 2189 spintime_expire = jiffies + 100 * HZ;
2190 spintime = 1;
1da177e4 2191 }
1da177e4
LT		 2192 /* Wait 1 second for next try */
2193 msleep(1000);
3a1d0783 2194 printk(KERN_CONT ".");
4451e472
AS		 2195
2196 /*
2197 * Wait for USB flash devices with slow firmware.
2198 * Yes, this sense key/ASC combination shouldn't
2199 * occur here. It's characteristic of these devices.
2200 */
2201 } else if (sense_valid &&
2202 sshdr.sense_key == UNIT_ATTENTION &&
2203 sshdr.asc == 0x28) {
2204 if (!spintime) {
2205 spintime_expire = jiffies + 5 * HZ;
2206 spintime = 1;
2207 }
2208 /* Wait 1 second for next try */
2209 msleep(1000);
1da177e4
LT		 2210 } else {
2211 /* we don't understand the sense code, so it's
2212 * probably pointless to loop */
2213 if(!spintime) {
e73aec82
MP		 2214 sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n");
2215 sd_print_sense_hdr(sdkp, &sshdr);
1da177e4
LT		 2216 }
2217 break;
2218 }
2219
4451e472 2220 } while (spintime && time_before_eq(jiffies, spintime_expire));
1da177e4
LT		 2221
2222 if (spintime) {
2223 if (scsi_status_is_good(the_result))
3a1d0783 2224 printk(KERN_CONT "ready\n");
1da177e4 2225 else
3a1d0783 2226 printk(KERN_CONT "not responding...\n");
1da177e4
LT		 2227 }
2228}
2229
e0597d70
MP		 2230/*
2231 * Determine whether disk supports Data Integrity Field.
2232 */
fe542396 2233static int sd_read_protection_type(struct scsi_disk *sdkp, unsigned char *buffer)
e0597d70
MP		 2234{
2235 struct scsi_device *sdp = sdkp->device;
2236 u8 type;
fe542396 2237 int ret = 0;
e0597d70
MP		 2238
2239 if (scsi_device_protection(sdp) == 0 || (buffer[12] & 1) == 0)
fe542396 2240 return ret;
35e1a5d9
MP		 2241
2242 type = ((buffer[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */
2243
8475c811 2244 if (type > T10_PI_TYPE3_PROTECTION)
fe542396
MP		 2245 ret = -ENODEV;
2246 else if (scsi_host_dif_capable(sdp->host, type))
2247 ret = 1;
2248
2249 if (sdkp->first_scan || type != sdkp->protection_type)
2250 switch (ret) {
2251 case -ENODEV:
2252 sd_printk(KERN_ERR, sdkp, "formatted with unsupported" \
2253 " protection type %u. Disabling disk!\n",
2254 type);
2255 break;
2256 case 1:
2257 sd_printk(KERN_NOTICE, sdkp,
2258 "Enabling DIF Type %u protection\n", type);
2259 break;
2260 case 0:
2261 sd_printk(KERN_NOTICE, sdkp,
2262 "Disabling DIF Type %u protection\n", type);
2263 break;
2264 }
e0597d70 2265
be922f47
MP		 2266 sdkp->protection_type = type;
2267
fe542396 2268 return ret;
e0597d70
MP		 2269}
2270
0da205e0
MW		 2271static void read_capacity_error(struct scsi_disk *sdkp, struct scsi_device *sdp,
2272 struct scsi_sense_hdr *sshdr, int sense_valid,
2273 int the_result)
2274{
c65be1a6 2275 if (driver_byte(the_result) == DRIVER_SENSE)
0da205e0
MW		 2276 sd_print_sense_hdr(sdkp, sshdr);
2277 else
2278 sd_printk(KERN_NOTICE, sdkp, "Sense not available.\n");
2279
2280 /*
2281 * Set dirty bit for removable devices if not ready -
2282 * sometimes drives will not report this properly.
2283 */
2284 if (sdp->removable &&
2285 sense_valid && sshdr->sense_key == NOT_READY)
2bae0093 2286 set_media_not_present(sdkp);
0da205e0
MW		 2287
2288 /*
2289 * We used to set media_present to 0 here to indicate no media
2290 * in the drive, but some drives fail read capacity even with
2291 * media present, so we can't do that.
2292 */
2293 sdkp->capacity = 0; /* unknown mapped to zero - as usual */
2294}
2295
2296#define RC16_LEN 32
2297#if RC16_LEN > SD_BUF_SIZE
2298#error RC16_LEN must not be more than SD_BUF_SIZE
2299#endif
2300
3233ac19
JB		 2301#define READ_CAPACITY_RETRIES_ON_RESET 10
2302
7c856152
MP		 2303/*
2304 * Ensure that we don't overflow sector_t when CONFIG_LBDAF is not set
2305 * and the reported logical block size is bigger than 512 bytes. Note
2306 * that last_sector is a u64 and therefore logical_to_sectors() is not
2307 * applicable.
2308 */
2309static bool sd_addressable_capacity(u64 lba, unsigned int sector_size)
2310{
2311 u64 last_sector = (lba + 1ULL) << (ilog2(sector_size) - 9);
2312
2313 if (sizeof(sector_t) == 4 && last_sector > U32_MAX)
2314 return false;
2315
2316 return true;
2317}
2318
0da205e0
MW		 2319static int read_capacity_16(struct scsi_disk *sdkp, struct scsi_device *sdp,
2320 unsigned char *buffer)
ea73a9f2 2321{
1da177e4 2322 unsigned char cmd[16];
1da177e4
LT		 2323 struct scsi_sense_hdr sshdr;
2324 int sense_valid = 0;
0da205e0 2325 int the_result;
3233ac19 2326 int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET;
ea09bcc9 2327 unsigned int alignment;
0da205e0
MW		 2328 unsigned long long lba;
2329 unsigned sector_size;
1da177e4 2330
5ce524bd
HG		 2331 if (sdp->no_read_capacity_16)
2332 return -EINVAL;
2333
1da177e4 2334 do {
0da205e0 2335 memset(cmd, 0, 16);
eb846d9f 2336 cmd[0] = SERVICE_ACTION_IN_16;
0da205e0
MW		 2337 cmd[1] = SAI_READ_CAPACITY_16;
2338 cmd[13] = RC16_LEN;
2339 memset(buffer, 0, RC16_LEN);
2340
ea73a9f2 2341 the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE,
0da205e0
MW		 2342 buffer, RC16_LEN, &sshdr,
2343 SD_TIMEOUT, SD_MAX_RETRIES, NULL);
1da177e4 2344
ea73a9f2 2345 if (media_not_present(sdkp, &sshdr))
0da205e0 2346 return -ENODEV;
1da177e4 2347
2b301307 2348 if (the_result) {
ea73a9f2 2349 sense_valid = scsi_sense_valid(&sshdr);
2b301307
MW		 2350 if (sense_valid &&
2351 sshdr.sense_key == ILLEGAL_REQUEST &&
2352 (sshdr.asc == 0x20 || sshdr.asc == 0x24) &&
2353 sshdr.ascq == 0x00)
2354 /* Invalid Command Operation Code or
2355 * Invalid Field in CDB, just retry
2356 * silently with RC10 */
2357 return -EINVAL;
3233ac19
JB		 2358 if (sense_valid &&
2359 sshdr.sense_key == UNIT_ATTENTION &&
2360 sshdr.asc == 0x29 && sshdr.ascq == 0x00)
2361 /* Device reset might occur several times,
2362 * give it one more chance */
2363 if (--reset_retries > 0)
2364 continue;
2b301307 2365 }
1da177e4
LT		 2366 retries--;
2367
2368 } while (the_result && retries);
2369
0da205e0 2370 if (the_result) {
ef61329d 2371 sd_print_result(sdkp, "Read Capacity(16) failed", the_result);
0da205e0
MW		 2372 read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result);
2373 return -EINVAL;
2374 }
e73aec82 2375
8f76d151
DH		 2376 sector_size = get_unaligned_be32(&buffer[8]);
2377 lba = get_unaligned_be64(&buffer[0]);
0da205e0 2378
fe542396
MP		 2379 if (sd_read_protection_type(sdkp, buffer) < 0) {
2380 sdkp->capacity = 0;
2381 return -ENODEV;
2382 }
0da205e0 2383
7c856152 2384 if (!sd_addressable_capacity(lba, sector_size)) {
0da205e0
MW		 2385 sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a "
2386 "kernel compiled with support for large block "
2387 "devices.\n");
2388 sdkp->capacity = 0;
2389 return -EOVERFLOW;
2390 }
2391
ea09bcc9 2392 /* Logical blocks per physical block exponent */
526f7c79 2393 sdkp->physical_block_size = (1 << (buffer[13] & 0xf)) * sector_size;
ea09bcc9 2394
89d94756
HR		 2395 /* RC basis */
2396 sdkp->rc_basis = (buffer[12] >> 4) & 0x3;
2397
ea09bcc9
MP		 2398 /* Lowest aligned logical block */
2399 alignment = ((buffer[14] & 0x3f) << 8 | buffer[15]) * sector_size;
2400 blk_queue_alignment_offset(sdp->request_queue, alignment);
2401 if (alignment && sdkp->first_scan)
2402 sd_printk(KERN_NOTICE, sdkp,
2403 "physical block alignment offset: %u\n", alignment);
2404
c98a0eb0
MP		 2405 if (buffer[14] & 0x80) { /* LBPME */
2406 sdkp->lbpme = 1;
e339c1a7 2407
c98a0eb0
MP		 2408 if (buffer[14] & 0x40) /* LBPRZ */
2409 sdkp->lbprz = 1;
e339c1a7 2410
c98a0eb0 2411 sd_config_discard(sdkp, SD_LBP_WS16);
e339c1a7
MP		 2412 }
2413
0da205e0
MW		 2414 sdkp->capacity = lba + 1;
2415 return sector_size;
2416}
2417
2418static int read_capacity_10(struct scsi_disk *sdkp, struct scsi_device *sdp,
2419 unsigned char *buffer)
2420{
2421 unsigned char cmd[16];
2422 struct scsi_sense_hdr sshdr;
2423 int sense_valid = 0;
2424 int the_result;
3233ac19 2425 int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET;
0da205e0
MW		 2426 sector_t lba;
2427 unsigned sector_size;
2428
2429 do {
2430 cmd[0] = READ_CAPACITY;
2431 memset(&cmd[1], 0, 9);
2432 memset(buffer, 0, 8);
2433
2434 the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE,
2435 buffer, 8, &sshdr,
2436 SD_TIMEOUT, SD_MAX_RETRIES, NULL);
2437
2438 if (media_not_present(sdkp, &sshdr))
2439 return -ENODEV;
2440
3233ac19 2441 if (the_result) {
0da205e0 2442 sense_valid = scsi_sense_valid(&sshdr);
3233ac19
JB		 2443 if (sense_valid &&
2444 sshdr.sense_key == UNIT_ATTENTION &&
2445 sshdr.asc == 0x29 && sshdr.ascq == 0x00)
2446 /* Device reset might occur several times,
2447 * give it one more chance */
2448 if (--reset_retries > 0)
2449 continue;
2450 }
0da205e0
MW		 2451 retries--;
2452
2453 } while (the_result && retries);
2454
2455 if (the_result) {
ef61329d 2456 sd_print_result(sdkp, "Read Capacity(10) failed", the_result);
0da205e0
MW		 2457 read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result);
2458 return -EINVAL;
2459 }
2460
8f76d151
DH		 2461 sector_size = get_unaligned_be32(&buffer[4]);
2462 lba = get_unaligned_be32(&buffer[0]);
0da205e0 2463
5ce524bd
HG		 2464 if (sdp->no_read_capacity_16 && (lba == 0xffffffff)) {
2465 /* Some buggy (usb cardreader) devices return an lba of
2466 0xffffffff when the want to report a size of 0 (with
2467 which they really mean no media is present) */
2468 sdkp->capacity = 0;
5cc10350 2469 sdkp->physical_block_size = sector_size;
5ce524bd
HG		 2470 return sector_size;
2471 }
2472
7c856152 2473 if (!sd_addressable_capacity(lba, sector_size)) {
0da205e0
MW		 2474 sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a "
2475 "kernel compiled with support for large block "
2476 "devices.\n");
2477 sdkp->capacity = 0;
2478 return -EOVERFLOW;
2479 }
2480
2481 sdkp->capacity = lba + 1;
526f7c79 2482 sdkp->physical_block_size = sector_size;
0da205e0
MW		 2483 return sector_size;
2484}
2485
2b301307
MW		 2486static int sd_try_rc16_first(struct scsi_device *sdp)
2487{
f87146bb
HR		 2488 if (sdp->host->max_cmd_len < 16)
2489 return 0;
6a0bdffa
AS		 2490 if (sdp->try_rc_10_first)
2491 return 0;
2b301307
MW		 2492 if (sdp->scsi_level > SCSI_SPC_2)
2493 return 1;
2494 if (scsi_device_protection(sdp))
2495 return 1;
2496 return 0;
2497}
2498
0da205e0
MW		 2499/*
2500 * read disk capacity
2501 */
2502static void
2503sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer)
2504{
2505 int sector_size;
2506 struct scsi_device *sdp = sdkp->device;
2507
2b301307 2508 if (sd_try_rc16_first(sdp)) {
0da205e0
MW		 2509 sector_size = read_capacity_16(sdkp, sdp, buffer);
2510 if (sector_size == -EOVERFLOW)
1da177e4 2511 goto got_data;
2b301307
MW		 2512 if (sector_size == -ENODEV)
2513 return;
2514 if (sector_size < 0)
2515 sector_size = read_capacity_10(sdkp, sdp, buffer);
0da205e0
MW		 2516 if (sector_size < 0)
2517 return;
1da177e4 2518 } else {
0da205e0
MW		 2519 sector_size = read_capacity_10(sdkp, sdp, buffer);
2520 if (sector_size == -EOVERFLOW)
2521 goto got_data;
2522 if (sector_size < 0)
2523 return;
2524 if ((sizeof(sdkp->capacity) > 4) &&
2525 (sdkp->capacity > 0xffffffffULL)) {
2526 int old_sector_size = sector_size;
2527 sd_printk(KERN_NOTICE, sdkp, "Very big device. "
2528 "Trying to use READ CAPACITY(16).\n");
2529 sector_size = read_capacity_16(sdkp, sdp, buffer);
2530 if (sector_size < 0) {
2531 sd_printk(KERN_NOTICE, sdkp,
2532 "Using 0xffffffff as device size\n");
2533 sdkp->capacity = 1 + (sector_t) 0xffffffff;
2534 sector_size = old_sector_size;
2535 goto got_data;
2536 }
597d7400
MP		 2537 /* Remember that READ CAPACITY(16) succeeded */
2538 sdp->try_rc_10_first = 0;
0da205e0
MW		 2539 }
2540 }
1da177e4 2541
5c211caa
AS		 2542 /* Some devices are known to return the total number of blocks,
2543 * not the highest block number. Some devices have versions
2544 * which do this and others which do not. Some devices we might
2545 * suspect of doing this but we don't know for certain.
2546 *
2547 * If we know the reported capacity is wrong, decrement it. If
2548 * we can only guess, then assume the number of blocks is even
2549 * (usually true but not always) and err on the side of lowering
2550 * the capacity.
2551 */
2552 if (sdp->fix_capacity ||
2553 (sdp->guess_capacity && (sdkp->capacity & 0x01))) {
2554 sd_printk(KERN_INFO, sdkp, "Adjusting the sector count "
2555 "from its reported value: %llu\n",
2556 (unsigned long long) sdkp->capacity);
1da177e4 2557 --sdkp->capacity;
61bf54b7
ON		 2558 }
2559
1da177e4
LT		 2560got_data:
2561 if (sector_size == 0) {
2562 sector_size = 512;
e73aec82
MP		 2563 sd_printk(KERN_NOTICE, sdkp, "Sector size 0 reported, "
2564 "assuming 512.\n");
1da177e4
LT		 2565 }
2566
2567 if (sector_size != 512 &&
2568 sector_size != 1024 &&
2569 sector_size != 2048 &&
74856fbf 2570 sector_size != 4096) {
e73aec82
MP		 2571 sd_printk(KERN_NOTICE, sdkp, "Unsupported sector size %d.\n",
2572 sector_size);
1da177e4
LT		 2573 /*
2574 * The user might want to re-format the drive with
2575 * a supported sectorsize. Once this happens, it
2576 * would be relatively trivial to set the thing up.
2577 * For this reason, we leave the thing in the table.
2578 */
2579 sdkp->capacity = 0;
2580 /*
2581 * set a bogus sector size so the normal read/write
2582 * logic in the block layer will eventually refuse any
2583 * request on this device without tripping over power
2584 * of two sector size assumptions
2585 */
2586 sector_size = 512;
2587 }
e1defc4f 2588 blk_queue_logical_block_size(sdp->request_queue, sector_size);
89d94756
HR		 2589 blk_queue_physical_block_size(sdp->request_queue,
2590 sdkp->physical_block_size);
2591 sdkp->device->sector_size = sector_size;
7404ad3b 2592
89d94756
HR		 2593 if (sdkp->capacity > 0xffffffff)
2594 sdp->use_16_for_rw = 1;
1da177e4 2595
89d94756 2596}
1da177e4 2597
89d94756
HR		 2598/*
2599 * Print disk capacity
2600 */
2601static void
2602sd_print_capacity(struct scsi_disk *sdkp,
2603 sector_t old_capacity)
2604{
2605 int sector_size = sdkp->device->sector_size;
2606 char cap_str_2[10], cap_str_10[10];
ea09bcc9 2607
89d94756
HR		 2608 string_get_size(sdkp->capacity, sector_size,
2609 STRING_UNITS_2, cap_str_2, sizeof(cap_str_2));
2610 string_get_size(sdkp->capacity, sector_size,
2611 STRING_UNITS_10, cap_str_10,
2612 sizeof(cap_str_10));
1da177e4 2613
89d94756
HR		 2614 if (sdkp->first_scan || old_capacity != sdkp->capacity) {
2615 sd_printk(KERN_NOTICE, sdkp,
2616 "%llu %d-byte logical blocks: (%s/%s)\n",
2617 (unsigned long long)sdkp->capacity,
2618 sector_size, cap_str_10, cap_str_2);
53ad570b 2619
89d94756
HR		 2620 if (sdkp->physical_block_size != sector_size)
2621 sd_printk(KERN_NOTICE, sdkp,
2622 "%u-byte physical blocks\n",
2623 sdkp->physical_block_size);
2624
2625 sd_zbc_print_zones(sdkp);
2626 }
1da177e4
LT		 2627}
2628
2629/* called with buffer of length 512 */
2630static inline int
ea73a9f2
JB		 2631sd_do_mode_sense(struct scsi_device *sdp, int dbd, int modepage,
2632 unsigned char *buffer, int len, struct scsi_mode_data *data,
2633 struct scsi_sense_hdr *sshdr)
1da177e4 2634{
ea73a9f2 2635 return scsi_mode_sense(sdp, dbd, modepage, buffer, len,
1cf72699 2636 SD_TIMEOUT, SD_MAX_RETRIES, data,
ea73a9f2 2637 sshdr);
1da177e4
LT		 2638}
2639
2640/*
2641 * read write protect setting, if possible - called only in sd_revalidate_disk()
48970800 2642 * called with buffer of length SD_BUF_SIZE
1da177e4
LT		 2643 */
2644static void
e73aec82 2645sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer)
ea73a9f2 2646{
1da177e4 2647 int res;
ea73a9f2 2648 struct scsi_device *sdp = sdkp->device;
1da177e4 2649 struct scsi_mode_data data;
20bd1d02 2650 int disk_ro = get_disk_ro(sdkp->disk);
70a9b873 2651 int old_wp = sdkp->write_prot;
1da177e4
LT		 2652
2653 set_disk_ro(sdkp->disk, 0);
ea73a9f2 2654 if (sdp->skip_ms_page_3f) {
b2bff6ce 2655 sd_first_printk(KERN_NOTICE, sdkp, "Assuming Write Enabled\n");
1da177e4
LT		 2656 return;
2657 }
2658
ea73a9f2
JB		 2659 if (sdp->use_192_bytes_for_3f) {
2660 res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 192, &data, NULL);
1da177e4
LT		 2661 } else {
2662 /*
2663 * First attempt: ask for all pages (0x3F), but only 4 bytes.
2664 * We have to start carefully: some devices hang if we ask
2665 * for more than is available.
2666 */
ea73a9f2 2667 res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 4, &data, NULL);
1da177e4
LT		 2668
2669 /*
2670 * Second attempt: ask for page 0 When only page 0 is
2671 * implemented, a request for page 3F may return Sense Key
2672 * 5: Illegal Request, Sense Code 24: Invalid field in
2673 * CDB.
2674 */
2675 if (!scsi_status_is_good(res))
ea73a9f2 2676 res = sd_do_mode_sense(sdp, 0, 0, buffer, 4, &data, NULL);
1da177e4
LT		 2677
2678 /*
2679 * Third attempt: ask 255 bytes, as we did earlier.
2680 */
2681 if (!scsi_status_is_good(res))
ea73a9f2
JB		 2682 res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 255,
2683 &data, NULL);
1da177e4
LT		 2684 }
2685
2686 if (!scsi_status_is_good(res)) {
b2bff6ce 2687 sd_first_printk(KERN_WARNING, sdkp,
e73aec82 2688 "Test WP failed, assume Write Enabled\n");
1da177e4
LT		 2689 } else {
2690 sdkp->write_prot = ((data.device_specific & 0x80) != 0);
20bd1d02 2691 set_disk_ro(sdkp->disk, sdkp->write_prot || disk_ro);
70a9b873
MP		 2692 if (sdkp->first_scan || old_wp != sdkp->write_prot) {
2693 sd_printk(KERN_NOTICE, sdkp, "Write Protect is %s\n",
2694 sdkp->write_prot ? "on" : "off");
df441cc0 2695 sd_printk(KERN_DEBUG, sdkp, "Mode Sense: %4ph\n", buffer);
70a9b873 2696 }
1da177e4
LT		 2697 }
2698}
2699
2700/*
2701 * sd_read_cache_type - called only from sd_revalidate_disk()
48970800 2702 * called with buffer of length SD_BUF_SIZE
1da177e4
LT		 2703 */
2704static void
e73aec82 2705sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer)
631e8a13 2706{
1da177e4 2707 int len = 0, res;
ea73a9f2 2708 struct scsi_device *sdp = sdkp->device;
1da177e4 2709
631e8a13
AV		 2710 int dbd;
2711 int modepage;
0bcaa111 2712 int first_len;
1da177e4
LT		 2713 struct scsi_mode_data data;
2714 struct scsi_sense_hdr sshdr;
70a9b873
MP		 2715 int old_wce = sdkp->WCE;
2716 int old_rcd = sdkp->RCD;
2717 int old_dpofua = sdkp->DPOFUA;
1da177e4 2718
39c60a09
JB		 2719
2720 if (sdkp->cache_override)
2721 return;
2722
0bcaa111
LT		 2723 first_len = 4;
2724 if (sdp->skip_ms_page_8) {
2725 if (sdp->type == TYPE_RBC)
2726 goto defaults;
2727 else {
2728 if (sdp->skip_ms_page_3f)
2729 goto defaults;
2730 modepage = 0x3F;
2731 if (sdp->use_192_bytes_for_3f)
2732 first_len = 192;
2733 dbd = 0;
2734 }
2735 } else if (sdp->type == TYPE_RBC) {
631e8a13
AV		 2736 modepage = 6;
2737 dbd = 8;
2738 } else {
2739 modepage = 8;
2740 dbd = 0;
2741 }
2742
1da177e4 2743 /* cautiously ask */
0bcaa111
LT		 2744 res = sd_do_mode_sense(sdp, dbd, modepage, buffer, first_len,
2745 &data, &sshdr);
1da177e4
LT		 2746
2747 if (!scsi_status_is_good(res))
2748 goto bad_sense;
2749
6d73c851
AV		 2750 if (!data.header_length) {
2751 modepage = 6;
0bcaa111 2752 first_len = 0;
b2bff6ce
MP		 2753 sd_first_printk(KERN_ERR, sdkp,
2754 "Missing header in MODE_SENSE response\n");
6d73c851
AV		 2755 }
2756
1da177e4
LT		 2757 /* that went OK, now ask for the proper length */
2758 len = data.length;
2759
2760 /*
2761 * We're only interested in the first three bytes, actually.
2762 * But the data cache page is defined for the first 20.
2763 */
2764 if (len < 3)
2765 goto bad_sense;
0bcaa111 2766 else if (len > SD_BUF_SIZE) {
b2bff6ce 2767 sd_first_printk(KERN_NOTICE, sdkp, "Truncating mode parameter "
0bcaa111
LT		 2768 "data from %d to %d bytes\n", len, SD_BUF_SIZE);
2769 len = SD_BUF_SIZE;
2770 }
2771 if (modepage == 0x3F && sdp->use_192_bytes_for_3f)
2772 len = 192;
1da177e4
LT		 2773
2774 /* Get the data */
0bcaa111
LT		 2775 if (len > first_len)
2776 res = sd_do_mode_sense(sdp, dbd, modepage, buffer, len,
2777 &data, &sshdr);
1da177e4
LT		 2778
2779 if (scsi_status_is_good(res)) {
631e8a13 2780 int offset = data.header_length + data.block_descriptor_length;
1da177e4 2781
0bcaa111
LT		 2782 while (offset < len) {
2783 u8 page_code = buffer[offset] & 0x3F;
2784 u8 spf = buffer[offset] & 0x40;
2785
2786 if (page_code == 8 || page_code == 6) {
2787 /* We're interested only in the first 3 bytes.
2788 */
2789 if (len - offset <= 2) {
b2bff6ce
MP		 2790 sd_first_printk(KERN_ERR, sdkp,
2791 "Incomplete mode parameter "
2792 "data\n");
0bcaa111
LT		 2793 goto defaults;
2794 } else {
2795 modepage = page_code;
2796 goto Page_found;
2797 }
2798 } else {
2799 /* Go to the next page */
2800 if (spf && len - offset > 3)
2801 offset += 4 + (buffer[offset+2] << 8) +
2802 buffer[offset+3];
2803 else if (!spf && len - offset > 1)
2804 offset += 2 + buffer[offset+1];
2805 else {
b2bff6ce
MP		 2806 sd_first_printk(KERN_ERR, sdkp,
2807 "Incomplete mode "
2808 "parameter data\n");
0bcaa111
LT		 2809 goto defaults;
2810 }
2811 }
48970800
AV		 2812 }
2813
b2bff6ce 2814 sd_first_printk(KERN_ERR, sdkp, "No Caching mode page found\n");
984f1733
AS		 2815 goto defaults;
2816
0bcaa111 2817 Page_found:
631e8a13
AV		 2818 if (modepage == 8) {
2819 sdkp->WCE = ((buffer[offset + 2] & 0x04) != 0);
2820 sdkp->RCD = ((buffer[offset + 2] & 0x01) != 0);
2821 } else {
2822 sdkp->WCE = ((buffer[offset + 2] & 0x01) == 0);
2823 sdkp->RCD = 0;
2824 }
1da177e4 2825
007365ad 2826 sdkp->DPOFUA = (data.device_specific & 0x10) != 0;
b14bf2d0
AS		 2827 if (sdp->broken_fua) {
2828 sd_first_printk(KERN_NOTICE, sdkp, "Disabling FUA\n");
2829 sdkp->DPOFUA = 0;
26f28197
DLM		 2830 } else if (sdkp->DPOFUA && !sdkp->device->use_10_for_rw &&
2831 !sdkp->device->use_16_for_rw) {
b2bff6ce 2832 sd_first_printk(KERN_NOTICE, sdkp,
e73aec82 2833 "Uses READ/WRITE(6), disabling FUA\n");
007365ad
TH		 2834 sdkp->DPOFUA = 0;
2835 }
2836
2eefd57b
SRT		 2837 /* No cache flush allowed for write protected devices */
2838 if (sdkp->WCE && sdkp->write_prot)
2839 sdkp->WCE = 0;
2840
70a9b873
MP		 2841 if (sdkp->first_scan || old_wce != sdkp->WCE ||
2842 old_rcd != sdkp->RCD || old_dpofua != sdkp->DPOFUA)
2843 sd_printk(KERN_NOTICE, sdkp,
2844 "Write cache: %s, read cache: %s, %s\n",
2845 sdkp->WCE ? "enabled" : "disabled",
2846 sdkp->RCD ? "disabled" : "enabled",
2847 sdkp->DPOFUA ? "supports DPO and FUA"
2848 : "doesn't support DPO or FUA");
1da177e4
LT		 2849
2850 return;
2851 }
2852
2853bad_sense:
ea73a9f2 2854 if (scsi_sense_valid(&sshdr) &&
1da177e4
LT		 2855 sshdr.sense_key == ILLEGAL_REQUEST &&
2856 sshdr.asc == 0x24 && sshdr.ascq == 0x0)
e73aec82 2857 /* Invalid field in CDB */
b2bff6ce 2858 sd_first_printk(KERN_NOTICE, sdkp, "Cache data unavailable\n");
1da177e4 2859 else
b2bff6ce
MP		 2860 sd_first_printk(KERN_ERR, sdkp,
2861 "Asking for cache data failed\n");
1da177e4
LT		 2862
2863defaults:
b81478d8 2864 if (sdp->wce_default_on) {
b2bff6ce
MP		 2865 sd_first_printk(KERN_NOTICE, sdkp,
2866 "Assuming drive cache: write back\n");
b81478d8
NJ		 2867 sdkp->WCE = 1;
2868 } else {
b2bff6ce
MP		 2869 sd_first_printk(KERN_ERR, sdkp,
2870 "Assuming drive cache: write through\n");
b81478d8
NJ		 2871 sdkp->WCE = 0;
2872 }
1da177e4 2873 sdkp->RCD = 0;
48970800 2874 sdkp->DPOFUA = 0;
1da177e4
LT		 2875}
2876
e0597d70
MP		 2877/*
2878 * The ATO bit indicates whether the DIF application tag is available
2879 * for use by the operating system.
2880 */
439d77f7 2881static void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer)
e0597d70
MP		 2882{
2883 int res, offset;
2884 struct scsi_device *sdp = sdkp->device;
2885 struct scsi_mode_data data;
2886 struct scsi_sense_hdr sshdr;
2887
89d94756 2888 if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC)
e0597d70
MP		 2889 return;
2890
2891 if (sdkp->protection_type == 0)
2892 return;
2893
2894 res = scsi_mode_sense(sdp, 1, 0x0a, buffer, 36, SD_TIMEOUT,
2895 SD_MAX_RETRIES, &data, &sshdr);
2896
2897 if (!scsi_status_is_good(res) || !data.header_length ||
2898 data.length < 6) {
b2bff6ce 2899 sd_first_printk(KERN_WARNING, sdkp,
e0597d70
MP		 2900 "getting Control mode page failed, assume no ATO\n");
2901
2902 if (scsi_sense_valid(&sshdr))
2903 sd_print_sense_hdr(sdkp, &sshdr);
2904
2905 return;
2906 }
2907
2908 offset = data.header_length + data.block_descriptor_length;
2909
2910 if ((buffer[offset] & 0x3f) != 0x0a) {
b2bff6ce 2911 sd_first_printk(KERN_ERR, sdkp, "ATO Got wrong page\n");
e0597d70
MP		 2912 return;
2913 }
2914
2915 if ((buffer[offset + 5] & 0x80) == 0)
2916 return;
2917
2918 sdkp->ATO = 1;
2919
2920 return;
2921}
2922
d11b6916
MP		 2923/**
2924 * sd_read_block_limits - Query disk device for preferred I/O sizes.
7529fbb0 2925 * @sdkp: disk to query
d11b6916
MP		 2926 */
2927static void sd_read_block_limits(struct scsi_disk *sdkp)
2928{
2929 unsigned int sector_sz = sdkp->device->sector_size;
bb2d3de1 2930 const int vpd_len = 64;
e3deec09 2931 unsigned char *buffer = kmalloc(vpd_len, GFP_KERNEL);
d11b6916 2932
e3deec09
JB		 2933 if (!buffer ||
2934 /* Block Limits VPD */
2935 scsi_get_vpd_page(sdkp->device, 0xb0, buffer, vpd_len))
2936 goto out;
d11b6916
MP		 2937
2938 blk_queue_io_min(sdkp->disk->queue,
2939 get_unaligned_be16(&buffer[6]) * sector_sz);
ca369d51
MP		 2940
2941 sdkp->max_xfer_blocks = get_unaligned_be32(&buffer[8]);
2942 sdkp->opt_xfer_blocks = get_unaligned_be32(&buffer[12]);
d11b6916 2943
c98a0eb0
MP		 2944 if (buffer[3] == 0x3c) {
2945 unsigned int lba_count, desc_count;
e339c1a7 2946
5db44863 2947 sdkp->max_ws_blocks = (u32)get_unaligned_be64(&buffer[36]);
e339c1a7 2948
c98a0eb0 2949 if (!sdkp->lbpme)
045d3fe7 2950 goto out;
045d3fe7 2951
c98a0eb0
MP		 2952 lba_count = get_unaligned_be32(&buffer[20]);
2953 desc_count = get_unaligned_be32(&buffer[24]);
045d3fe7 2954
c98a0eb0
MP		 2955 if (lba_count && desc_count)
2956 sdkp->max_unmap_blocks = lba_count;
e339c1a7 2957
c98a0eb0 2958 sdkp->unmap_granularity = get_unaligned_be32(&buffer[28]);
e339c1a7
MP		 2959
2960 if (buffer[32] & 0x80)
c98a0eb0 2961 sdkp->unmap_alignment =
e339c1a7 2962 get_unaligned_be32(&buffer[32]) & ~(1 << 31);
c98a0eb0
MP		 2963
2964 if (!sdkp->lbpvpd) { /* LBP VPD page not provided */
2965
2966 if (sdkp->max_unmap_blocks)
2967 sd_config_discard(sdkp, SD_LBP_UNMAP);
2968 else
2969 sd_config_discard(sdkp, SD_LBP_WS16);
2970
2971 } else { /* LBP VPD page tells us what to use */
bcd069bb 2972 if (sdkp->lbpu && sdkp->max_unmap_blocks)
e461338b
MP		 2973 sd_config_discard(sdkp, SD_LBP_UNMAP);
2974 else if (sdkp->lbpws)
c98a0eb0
MP		 2975 sd_config_discard(sdkp, SD_LBP_WS16);
2976 else if (sdkp->lbpws10)
2977 sd_config_discard(sdkp, SD_LBP_WS10);
2978 else
2979 sd_config_discard(sdkp, SD_LBP_DISABLE);
2980 }
e339c1a7
MP		 2981 }
2982
e3deec09 2983 out:
d11b6916
MP		 2984 kfree(buffer);
2985}
2986
3821d768
MP		 2987/**
2988 * sd_read_block_characteristics - Query block dev. characteristics
7529fbb0 2989 * @sdkp: disk to query
3821d768
MP		 2990 */
2991static void sd_read_block_characteristics(struct scsi_disk *sdkp)
2992{
89d94756 2993 struct request_queue *q = sdkp->disk->queue;
e3deec09 2994 unsigned char *buffer;
3821d768 2995 u16 rot;
bb2d3de1 2996 const int vpd_len = 64;
3821d768 2997
e3deec09 2998 buffer = kmalloc(vpd_len, GFP_KERNEL);
3821d768 2999
e3deec09
JB		 3000 if (!buffer ||
3001 /* Block Device Characteristics VPD */
3002 scsi_get_vpd_page(sdkp->device, 0xb1, buffer, vpd_len))
3003 goto out;
3821d768
MP		 3004
3005 rot = get_unaligned_be16(&buffer[4]);
3006
b277da0a 3007 if (rot == 1) {
8b904b5b
BVA		 3008 blk_queue_flag_set(QUEUE_FLAG_NONROT, q);
3009 blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, q);
83e32a59
XZ		 3010 } else {
3011 blk_queue_flag_clear(QUEUE_FLAG_NONROT, q);
3012 blk_queue_flag_set(QUEUE_FLAG_ADD_RANDOM, q);
b277da0a 3013 }
3821d768 3014
68af412c
DLM		 3015 if (sdkp->device->type == TYPE_ZBC) {
3016 /* Host-managed */
89d94756 3017 q->limits.zoned = BLK_ZONED_HM;
68af412c
DLM		 3018 } else {
3019 sdkp->zoned = (buffer[8] >> 4) & 3;
3020 if (sdkp->zoned == 1)
3021 /* Host-aware */
3022 q->limits.zoned = BLK_ZONED_HA;
3023 else
3024 /*
3025 * Treat drive-managed devices as
3026 * regular block devices.
3027 */
3028 q->limits.zoned = BLK_ZONED_NONE;
3029 }
89d94756
HR		 3030 if (blk_queue_is_zoned(q) && sdkp->first_scan)
3031 sd_printk(KERN_NOTICE, sdkp, "Host-%s zoned block device\n",
3032 q->limits.zoned == BLK_ZONED_HM ? "managed" : "aware");
3033
e3deec09 3034 out:
3821d768
MP		 3035 kfree(buffer);
3036}
3037
045d3fe7 3038/**
c98a0eb0 3039 * sd_read_block_provisioning - Query provisioning VPD page
7529fbb0 3040 * @sdkp: disk to query
045d3fe7 3041 */
c98a0eb0 3042static void sd_read_block_provisioning(struct scsi_disk *sdkp)
045d3fe7
MP		 3043{
3044 unsigned char *buffer;
3045 const int vpd_len = 8;
3046
c98a0eb0 3047 if (sdkp->lbpme == 0)
045d3fe7
MP		 3048 return;
3049
3050 buffer = kmalloc(vpd_len, GFP_KERNEL);
3051
3052 if (!buffer || scsi_get_vpd_page(sdkp->device, 0xb2, buffer, vpd_len))
3053 goto out;
3054
c98a0eb0
MP		 3055 sdkp->lbpvpd = 1;
3056 sdkp->lbpu = (buffer[5] >> 7) & 1; /* UNMAP */
3057 sdkp->lbpws = (buffer[5] >> 6) & 1; /* WRITE SAME(16) with UNMAP */
3058 sdkp->lbpws10 = (buffer[5] >> 5) & 1; /* WRITE SAME(10) with UNMAP */
045d3fe7
MP		 3059
3060 out:
3061 kfree(buffer);
3062}
3063
5db44863
MP		 3064static void sd_read_write_same(struct scsi_disk *sdkp, unsigned char *buffer)
3065{
66c28f97
MP		 3066 struct scsi_device *sdev = sdkp->device;
3067
54b2b50c
MP		 3068 if (sdev->host->no_write_same) {
3069 sdev->no_write_same = 1;
3070
3071 return;
3072 }
3073
66c28f97 3074 if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, INQUIRY) < 0) {
af73623f
BS		 3075 /* too large values might cause issues with arcmsr */
3076 int vpd_buf_len = 64;
3077
66c28f97
MP		 3078 sdev->no_report_opcodes = 1;
3079
3080 /* Disable WRITE SAME if REPORT SUPPORTED OPERATION
3081 * CODES is unsupported and the device has an ATA
3082 * Information VPD page (SAT).
3083 */
af73623f 3084 if (!scsi_get_vpd_page(sdev, 0x89, buffer, vpd_buf_len))
66c28f97
MP		 3085 sdev->no_write_same = 1;
3086 }
3087
3088 if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME_16) == 1)
5db44863 3089 sdkp->ws16 = 1;
66c28f97
MP		 3090
3091 if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME) == 1)
3092 sdkp->ws10 = 1;
5db44863
MP		 3093}
3094
d80210f2
CH		 3095static void sd_read_security(struct scsi_disk *sdkp, unsigned char *buffer)
3096{
3097 struct scsi_device *sdev = sdkp->device;
3098
3099 if (!sdev->security_supported)
3100 return;
3101
3102 if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE,
3103 SECURITY_PROTOCOL_IN) == 1 &&
3104 scsi_report_opcode(sdev, buffer, SD_BUF_SIZE,
3105 SECURITY_PROTOCOL_OUT) == 1)
3106 sdkp->security = 1;
3107}
3108
1da177e4
LT		 3109/**
3110 * sd_revalidate_disk - called the first time a new disk is seen,
3111 * performs disk spin up, read_capacity, etc.
3112 * @disk: struct gendisk we care about
3113 **/
3114static int sd_revalidate_disk(struct gendisk *disk)
3115{
3116 struct scsi_disk *sdkp = scsi_disk(disk);
3117 struct scsi_device *sdp = sdkp->device;
ca369d51 3118 struct request_queue *q = sdkp->disk->queue;
89d94756 3119 sector_t old_capacity = sdkp->capacity;
1da177e4 3120 unsigned char *buffer;
ca369d51 3121 unsigned int dev_max, rw_max;
1da177e4 3122
fa0d34be
MP		 3123 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp,
3124 "sd_revalidate_disk\n"));
1da177e4
LT		 3125
3126 /*
3127 * If the device is offline, don't try and read capacity or any
3128 * of the other niceties.
3129 */
3130 if (!scsi_device_online(sdp))
3131 goto out;
3132
a6123f14 3133 buffer = kmalloc(SD_BUF_SIZE, GFP_KERNEL);
1da177e4 3134 if (!buffer) {
e73aec82
MP		 3135 sd_printk(KERN_WARNING, sdkp, "sd_revalidate_disk: Memory "
3136 "allocation failure.\n");
ea73a9f2 3137 goto out;
1da177e4
LT		 3138 }
3139
e73aec82 3140 sd_spinup_disk(sdkp);
1da177e4
LT		 3141
3142 /*
3143 * Without media there is no reason to ask; moreover, some devices
3144 * react badly if we do.
3145 */
3146 if (sdkp->media_present) {
e73aec82 3147 sd_read_capacity(sdkp, buffer);
ffd4bc2a 3148
5ddfe085 3149 if (scsi_device_supports_vpd(sdp)) {
c98a0eb0 3150 sd_read_block_provisioning(sdkp);
ffd4bc2a
MP		 3151 sd_read_block_limits(sdkp);
3152 sd_read_block_characteristics(sdkp);
89d94756 3153 sd_zbc_read_zones(sdkp, buffer);
ffd4bc2a
MP		 3154 }
3155
89d94756
HR		 3156 sd_print_capacity(sdkp, old_capacity);
3157
e73aec82
MP		 3158 sd_read_write_protect_flag(sdkp, buffer);
3159 sd_read_cache_type(sdkp, buffer);
e0597d70 3160 sd_read_app_tag_own(sdkp, buffer);
5db44863 3161 sd_read_write_same(sdkp, buffer);
d80210f2 3162 sd_read_security(sdkp, buffer);
1da177e4 3163 }
461d4e90
TH		 3164
3165 /*
3166 * We now have all cache related info, determine how we deal
4913efe4 3167 * with flush requests.
461d4e90 3168 */
cb2fb68d 3169 sd_set_flush_flag(sdkp);
461d4e90 3170
ca369d51
MP		 3171 /* Initial block count limit based on CDB TRANSFER LENGTH field size. */
3172 dev_max = sdp->use_16_for_rw ? SD_MAX_XFER_BLOCKS : SD_DEF_XFER_BLOCKS;
3173
3174 /* Some devices report a maximum block count for READ/WRITE requests. */
3175 dev_max = min_not_zero(dev_max, sdkp->max_xfer_blocks);
3176 q->limits.max_dev_sectors = logical_to_sectors(sdp, dev_max);
3177
3178 /*
77082ca5 3179 * Determine the device's preferred I/O size for reads and writes
9c1d9c20
MP		 3180 * unless the reported value is unreasonably small, large, or
3181 * garbage.
ca369d51 3182 */
9c1d9c20
MP		 3183 if (sdkp->opt_xfer_blocks &&
3184 sdkp->opt_xfer_blocks <= dev_max &&
3185 sdkp->opt_xfer_blocks <= SD_DEF_XFER_BLOCKS &&
6b7e9cde
MP		 3186 logical_to_bytes(sdp, sdkp->opt_xfer_blocks) >= PAGE_SIZE) {
3187 q->limits.io_opt = logical_to_bytes(sdp, sdkp->opt_xfer_blocks);
3188 rw_max = logical_to_sectors(sdp, sdkp->opt_xfer_blocks);
3189 } else
67804145
FZ		 3190 rw_max = min_not_zero(logical_to_sectors(sdp, dev_max),
3191 (sector_t)BLK_DEF_MAX_SECTORS);
3a9794d3 3192
77082ca5
MP		 3193 /* Do not exceed controller limit */
3194 rw_max = min(rw_max, queue_max_hw_sectors(q));
3195
3196 /*
3197 * Only update max_sectors if previously unset or if the current value
3198 * exceeds the capabilities of the hardware.
3199 */
3200 if (sdkp->first_scan ||
3201 q->limits.max_sectors > q->limits.max_dev_sectors ||
3202 q->limits.max_sectors > q->limits.max_hw_sectors)
3203 q->limits.max_sectors = rw_max;
3204
3205 sdkp->first_scan = 0;
4f258a46 3206
f08bb1e0 3207 set_capacity(disk, logical_to_sectors(sdp, sdkp->capacity));
5db44863 3208 sd_config_write_same(sdkp);
1da177e4
LT		 3209 kfree(buffer);
3210
1da177e4
LT		 3211 out:
3212 return 0;
3213}
3214
72ec24bd
TH		 3215/**
3216 * sd_unlock_native_capacity - unlock native capacity
3217 * @disk: struct gendisk to set capacity for
3218 *
3219 * Block layer calls this function if it detects that partitions
3220 * on @disk reach beyond the end of the device. If the SCSI host
3221 * implements ->unlock_native_capacity() method, it's invoked to
3222 * give it a chance to adjust the device capacity.
3223 *
3224 * CONTEXT:
3225 * Defined by block layer. Might sleep.
3226 */
3227static void sd_unlock_native_capacity(struct gendisk *disk)
3228{
3229 struct scsi_device *sdev = scsi_disk(disk)->device;
3230
3231 if (sdev->host->hostt->unlock_native_capacity)
3232 sdev->host->hostt->unlock_native_capacity(sdev);
3233}
3234
3e1a7ff8
TH		 3235/**
3236 * sd_format_disk_name - format disk name
3237 * @prefix: name prefix - ie. "sd" for SCSI disks
3238 * @index: index of the disk to format name for
3239 * @buf: output buffer
3240 * @buflen: length of the output buffer
3241 *
3242 * SCSI disk names starts at sda. The 26th device is sdz and the
3243 * 27th is sdaa. The last one for two lettered suffix is sdzz
3244 * which is followed by sdaaa.
3245 *
3246 * This is basically 26 base counting with one extra 'nil' entry
3ad2f3fb 3247 * at the beginning from the second digit on and can be
3e1a7ff8
TH		 3248 * determined using similar method as 26 base conversion with the
3249 * index shifted -1 after each digit is computed.
3250 *
3251 * CONTEXT:
3252 * Don't care.
3253 *
3254 * RETURNS:
3255 * 0 on success, -errno on failure.
3256 */
3257static int sd_format_disk_name(char *prefix, int index, char *buf, int buflen)
3258{
3259 const int base = 'z' - 'a' + 1;
3260 char *begin = buf + strlen(prefix);
3261 char *end = buf + buflen;
3262 char *p;
3263 int unit;
3264
3265 p = end - 1;
3266 *p = '\0';
3267 unit = base;
3268 do {
3269 if (p == begin)
3270 return -EINVAL;
3271 *--p = 'a' + (index % unit);
3272 index = (index / unit) - 1;
3273 } while (index >= 0);
3274
3275 memmove(begin, p, end - p);
3276 memcpy(buf, prefix, strlen(prefix));
3277
3278 return 0;
3279}
3280
4ace92fc
AV		 3281/*
3282 * The asynchronous part of sd_probe
3283 */
3284static void sd_probe_async(void *data, async_cookie_t cookie)
3285{
3286 struct scsi_disk *sdkp = data;
3287 struct scsi_device *sdp;
3288 struct gendisk *gd;
3289 u32 index;
3290 struct device *dev;
3291
3292 sdp = sdkp->device;
3293 gd = sdkp->disk;
3294 index = sdkp->index;
3295 dev = &sdp->sdev_gendev;
3296
1a03ae0f
MR		 3297 gd->major = sd_major((index & 0xf0) >> 4);
3298 gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00);
1a03ae0f 3299
4ace92fc
AV		 3300 gd->fops = &sd_fops;
3301 gd->private_data = &sdkp->driver;
3302 gd->queue = sdkp->device->request_queue;
3303
70a9b873
MP		 3304 /* defaults, until the device tells us otherwise */
3305 sdp->sector_size = 512;
3306 sdkp->capacity = 0;
3307 sdkp->media_present = 1;
3308 sdkp->write_prot = 0;
39c60a09 3309 sdkp->cache_override = 0;
70a9b873
MP		 3310 sdkp->WCE = 0;
3311 sdkp->RCD = 0;
3312 sdkp->ATO = 0;
3313 sdkp->first_scan = 1;
18a4d0a2 3314 sdkp->max_medium_access_timeouts = SD_MAX_MEDIUM_TIMEOUTS;
70a9b873 3315
4ace92fc
AV		 3316 sd_revalidate_disk(gd);
3317
97fedbbe 3318 gd->flags = GENHD_FL_EXT_DEVT;
2bae0093 3319 if (sdp->removable) {
4ace92fc 3320 gd->flags |= GENHD_FL_REMOVABLE;
2bae0093
TH		 3321 gd->events |= DISK_EVENT_MEDIA_CHANGE;
3322 }
4ace92fc 3323
10c580e4 3324 blk_pm_runtime_init(sdp->request_queue, dev);
fef912bf 3325 device_add_disk(dev, gd, NULL);
fe542396
MP		 3326 if (sdkp->capacity)
3327 sd_dif_config_host(sdkp);
4ace92fc 3328
3821d768
MP		 3329 sd_revalidate_disk(gd);
3330
d80210f2
CH		 3331 if (sdkp->security) {
3332 sdkp->opal_dev = init_opal_dev(sdp, &sd_sec_submit);
3333 if (sdkp->opal_dev)
3334 sd_printk(KERN_NOTICE, sdkp, "supports TCG Opal\n");
3335 }
3336
4ace92fc
AV		 3337 sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n",
3338 sdp->removable ? "removable " : "");
478a8a05 3339 scsi_autopm_put_device(sdp);
ea038f63 3340 put_device(&sdkp->dev);
4ace92fc
AV		 3341}
3342
1da177e4
LT		 3343/**
3344 * sd_probe - called during driver initialization and whenever a
3345 * new scsi device is attached to the system. It is called once
3346 * for each scsi device (not just disks) present.
3347 * @dev: pointer to device object
3348 *
3349 * Returns 0 if successful (or not interested in this scsi device
3350 * (e.g. scanner)); 1 when there is an error.
3351 *
3352 * Note: this function is invoked from the scsi mid-level.
3353 * This function sets up the mapping between a given
3354 * <host,channel,id,lun> (found in sdp) and new device name
3355 * (e.g. /dev/sda). More precisely it is the block device major
3356 * and minor number that is chosen here.
3357 *
2db93ce8
PU		 3358 * Assume sd_probe is not re-entrant (for time being)
3359 * Also think about sd_probe() and sd_remove() running coincidentally.
1da177e4
LT		 3360 **/
3361static int sd_probe(struct device *dev)
3362{
3363 struct scsi_device *sdp = to_scsi_device(dev);
3364 struct scsi_disk *sdkp;
3365 struct gendisk *gd;
439d77f7 3366 int index;
1da177e4
LT		 3367 int error;
3368
6fe8c1db 3369 scsi_autopm_get_device(sdp);
1da177e4 3370 error = -ENODEV;
89d94756
HR		 3371 if (sdp->type != TYPE_DISK &&
3372 sdp->type != TYPE_ZBC &&
3373 sdp->type != TYPE_MOD &&
3374 sdp->type != TYPE_RBC)
1da177e4
LT		 3375 goto out;
3376
89d94756
HR		 3377#ifndef CONFIG_BLK_DEV_ZONED
3378 if (sdp->type == TYPE_ZBC)
3379 goto out;
3380#endif
9ccfc756 3381 SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO, sdp,
2db93ce8 3382 "sd_probe\n"));
1da177e4
LT		 3383
3384 error = -ENOMEM;
24669f75 3385 sdkp = kzalloc(sizeof(*sdkp), GFP_KERNEL);
1da177e4
LT		 3386 if (!sdkp)
3387 goto out;
3388
689d6fac 3389 gd = alloc_disk(SD_MINORS);
1da177e4 3390 if (!gd)
c01228db 3391 goto out_free;
1da177e4 3392
94015080
MW		 3393 index = ida_alloc(&sd_index_ida, GFP_KERNEL);
3394 if (index < 0) {
21208ae5 3395 sdev_printk(KERN_WARNING, sdp, "sd_probe: memory exhausted.\n");
1da177e4 3396 goto out_put;
1a03ae0f
MR		 3397 }
3398
3e1a7ff8 3399 error = sd_format_disk_name("sd", index, gd->disk_name, DISK_NAME_LEN);
21208ae5
DK		 3400 if (error) {
3401 sdev_printk(KERN_WARNING, sdp, "SCSI disk (sd) name length exceeded.\n");
f27bac27 3402 goto out_free_index;
21208ae5 3403 }
f27bac27 3404
1da177e4
LT		 3405 sdkp->device = sdp;
3406 sdkp->driver = &sd_template;
3407 sdkp->disk = gd;
3408 sdkp->index = index;
409f3499 3409 atomic_set(&sdkp->openers, 0);
9e1a1537 3410 atomic_set(&sdkp->device->ioerr_cnt, 0);
1da177e4 3411
601e7638
JB		 3412 if (!sdp->request_queue->rq_timeout) {
3413 if (sdp->type != TYPE_MOD)
3414 blk_queue_rq_timeout(sdp->request_queue, SD_TIMEOUT);
3415 else
3416 blk_queue_rq_timeout(sdp->request_queue,
3417 SD_MOD_TIMEOUT);
3418 }
3419
3420 device_initialize(&sdkp->dev);
478a8a05 3421 sdkp->dev.parent = dev;
601e7638 3422 sdkp->dev.class = &sd_disk_class;
02aa2a37 3423 dev_set_name(&sdkp->dev, "%s", dev_name(dev));
601e7638 3424
dee0586e
DC		 3425 error = device_add(&sdkp->dev);
3426 if (error)
601e7638
JB		 3427 goto out_free_index;
3428
478a8a05
AS		 3429 get_device(dev);
3430 dev_set_drvdata(dev, sdkp);
601e7638 3431
ea038f63 3432 get_device(&sdkp->dev); /* prevent release before async_schedule */
a7a20d10 3433 async_schedule_domain(sd_probe_async, sdkp, &scsi_sd_probe_domain);
1da177e4
LT		 3434
3435 return 0;
3436
f27bac27 3437 out_free_index:
94015080 3438 ida_free(&sd_index_ida, index);
6bdaa1f1 3439 out_put:
1da177e4 3440 put_disk(gd);
f170396c
CIK		 3441 out_free:
3442 kfree(sdkp);
6bdaa1f1 3443 out:
6fe8c1db 3444 scsi_autopm_put_device(sdp);
1da177e4
LT		 3445 return error;
3446}
3447
3448/**
3449 * sd_remove - called whenever a scsi disk (previously recognized by
3450 * sd_probe) is detached from the system. It is called (potentially
3451 * multiple times) during sd module unload.
f2a3313d 3452 * @dev: pointer to device object
1da177e4
LT		 3453 *
3454 * Note: this function is invoked from the scsi mid-level.
3455 * This function potentially frees up a device name (e.g. /dev/sdc)
3456 * that could be re-used by a subsequent sd_probe().
3457 * This function is not called when the built-in sd driver is "exit-ed".
3458 **/
3459static int sd_remove(struct device *dev)
3460{
601e7638 3461 struct scsi_disk *sdkp;
0761df9c 3462 dev_t devt;
1da177e4 3463
601e7638 3464 sdkp = dev_get_drvdata(dev);
0761df9c 3465 devt = disk_devt(sdkp->disk);
478a8a05
AS		 3466 scsi_autopm_get_device(sdkp->device);
3467
3c31b52f 3468 async_synchronize_full_domain(&scsi_sd_pm_domain);
a7a20d10 3469 async_synchronize_full_domain(&scsi_sd_probe_domain);
ee959b00 3470 device_del(&sdkp->dev);
1da177e4
LT		 3471 del_gendisk(sdkp->disk);
3472 sd_shutdown(dev);
39b7f1e2 3473
d80210f2
CH		 3474 free_opal_dev(sdkp->opal_dev);
3475
0761df9c
HR		 3476 blk_register_region(devt, SD_MINORS, NULL,
3477 sd_default_probe, NULL, NULL);
3478
0b950672 3479 mutex_lock(&sd_ref_mutex);
39b7f1e2 3480 dev_set_drvdata(dev, NULL);
ee959b00 3481 put_device(&sdkp->dev);
0b950672 3482 mutex_unlock(&sd_ref_mutex);
1da177e4
LT		 3483
3484 return 0;
3485}
3486
3487/**
3488 * scsi_disk_release - Called to free the scsi_disk structure
ee959b00 3489 * @dev: pointer to embedded class device
1da177e4 3490 *
0b950672 3491 * sd_ref_mutex must be held entering this routine. Because it is
1da177e4
LT		 3492 * called on last put, you should always use the scsi_disk_get()
3493 * scsi_disk_put() helpers which manipulate the semaphore directly
ee959b00 3494 * and never do a direct put_device.
1da177e4 3495 **/
ee959b00 3496static void scsi_disk_release(struct device *dev)
1da177e4 3497{
ee959b00 3498 struct scsi_disk *sdkp = to_scsi_disk(dev);
1da177e4
LT		 3499 struct gendisk *disk = sdkp->disk;
3500
94015080 3501 ida_free(&sd_index_ida, sdkp->index);
c01228db 3502
1da177e4 3503 disk->private_data = NULL;
1da177e4 3504 put_disk(disk);
39b7f1e2 3505 put_device(&sdkp->device->sdev_gendev);
1da177e4
LT		 3506
3507 kfree(sdkp);
3508}
3509
cc5d2c8c 3510static int sd_start_stop_device(struct scsi_disk *sdkp, int start)
c3c94c5a
TH		 3511{
3512 unsigned char cmd[6] = { START_STOP }; /* START_VALID */
3513 struct scsi_sense_hdr sshdr;
cc5d2c8c 3514 struct scsi_device *sdp = sdkp->device;
c3c94c5a
TH		 3515 int res;
3516
3517 if (start)
3518 cmd[4] |= 1; /* START */
3519
d2886ea3
SR		 3520 if (sdp->start_stop_pwr_cond)
3521 cmd[4] |= start ? 1 << 4 : 3 << 4; /* Active or Standby */
3522
c3c94c5a
TH		 3523 if (!scsi_device_online(sdp))
3524 return -ENODEV;
3525
fcbfffe2
CH		 3526 res = scsi_execute(sdp, cmd, DMA_NONE, NULL, 0, NULL, &sshdr,
3527 SD_TIMEOUT, SD_MAX_RETRIES, 0, RQF_PM, NULL);
c3c94c5a 3528 if (res) {
ef61329d 3529 sd_print_result(sdkp, "Start/Stop Unit failed", res);
c65be1a6 3530 if (driver_byte(res) == DRIVER_SENSE)
cc5d2c8c 3531 sd_print_sense_hdr(sdkp, &sshdr);
95897910
ON		 3532 if (scsi_sense_valid(&sshdr) &&
3533 /* 0x3a is medium not present */
3534 sshdr.asc == 0x3a)
3535 res = 0;
c3c94c5a
TH		 3536 }
3537
95897910
ON		 3538 /* SCSI error codes must not go to the generic layer */
3539 if (res)
3540 return -EIO;
3541
3542 return 0;
c3c94c5a
TH		 3543}
3544
1da177e4
LT		 3545/*
3546 * Send a SYNCHRONIZE CACHE instruction down to the device through
3547 * the normal SCSI command structure. Wait for the command to
3548 * complete.
3549 */
3550static void sd_shutdown(struct device *dev)
3551{
3d9a1f53 3552 struct scsi_disk *sdkp = dev_get_drvdata(dev);
1da177e4
LT		 3553
3554 if (!sdkp)
3555 return; /* this can happen */
3556
54f57588 3557 if (pm_runtime_suspended(dev))
3d9a1f53 3558 return;
54f57588 3559
95897910 3560 if (sdkp->WCE && sdkp->media_present) {
e73aec82 3561 sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n");
4fa83244 3562 sd_sync_cache(sdkp, NULL);
39b7f1e2 3563 }
c3c94c5a 3564
cc5d2c8c
JB		 3565 if (system_state != SYSTEM_RESTART && sdkp->device->manage_start_stop) {
3566 sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n");
3567 sd_start_stop_device(sdkp, 0);
c3c94c5a 3568 }
39b7f1e2 3569}
1da177e4 3570
95897910 3571static int sd_suspend_common(struct device *dev, bool ignore_stop_errors)
c3c94c5a 3572{
3d9a1f53 3573 struct scsi_disk *sdkp = dev_get_drvdata(dev);
4fa83244 3574 struct scsi_sense_hdr sshdr;
09ff92fe 3575 int ret = 0;
c3c94c5a 3576
13b43891
AS		 3577 if (!sdkp) /* E.g.: runtime suspend following sd_remove() */
3578 return 0;
c3c94c5a 3579
95897910 3580 if (sdkp->WCE && sdkp->media_present) {
cc5d2c8c 3581 sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n");
4fa83244
DB		 3582 ret = sd_sync_cache(sdkp, &sshdr);
3583
95897910
ON		 3584 if (ret) {
3585 /* ignore OFFLINE device */
3586 if (ret == -ENODEV)
4fa83244
DB		 3587 return 0;
3588
3589 if (!scsi_sense_valid(&sshdr) ||
3590 sshdr.sense_key != ILLEGAL_REQUEST)
3591 return ret;
3592
3593 /*
3594 * sshdr.sense_key == ILLEGAL_REQUEST means this drive
3595 * doesn't support sync. There's not much to do and
3596 * suspend shouldn't fail.
3597 */
ed91f7ed 3598 ret = 0;
95897910 3599 }
c3c94c5a
TH		 3600 }
3601
691e3d31 3602 if (sdkp->device->manage_start_stop) {
cc5d2c8c 3603 sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n");
95897910 3604 /* an error is not worth aborting a system sleep */
cc5d2c8c 3605 ret = sd_start_stop_device(sdkp, 0);
95897910
ON		 3606 if (ignore_stop_errors)
3607 ret = 0;
c3c94c5a
TH		 3608 }
3609
09ff92fe 3610 return ret;
c3c94c5a
TH		 3611}
3612
95897910
ON		 3613static int sd_suspend_system(struct device *dev)
3614{
3615 return sd_suspend_common(dev, true);
3616}
3617
3618static int sd_suspend_runtime(struct device *dev)
3619{
3620 return sd_suspend_common(dev, false);
3621}
3622
c3c94c5a
TH		 3623static int sd_resume(struct device *dev)
3624{
3d9a1f53 3625 struct scsi_disk *sdkp = dev_get_drvdata(dev);
d80210f2 3626 int ret;
c3c94c5a 3627
13b43891
AS		 3628 if (!sdkp) /* E.g.: runtime resume at the start of sd_probe() */
3629 return 0;
3630
cc5d2c8c 3631 if (!sdkp->device->manage_start_stop)
3d9a1f53 3632 return 0;
c3c94c5a 3633
cc5d2c8c 3634 sd_printk(KERN_NOTICE, sdkp, "Starting disk\n");
d80210f2
CH		 3635 ret = sd_start_stop_device(sdkp, 1);
3636 if (!ret)
3637 opal_unlock_from_suspend(sdkp->opal_dev);
3638 return ret;
c3c94c5a
TH		 3639}
3640
1da177e4
LT		 3641/**
3642 * init_sd - entry point for this driver (both when built in or when
3643 * a module).
3644 *
3645 * Note: this function registers this driver with the scsi mid-level.
3646 **/
3647static int __init init_sd(void)
3648{
5e4009ba 3649 int majors = 0, i, err;
1da177e4
LT		 3650
3651 SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n"));
3652
0761df9c
HR		 3653 for (i = 0; i < SD_MAJORS; i++) {
3654 if (register_blkdev(sd_major(i), "sd") != 0)
3655 continue;
3656 majors++;
3657 blk_register_region(sd_major(i), SD_MINORS, NULL,
3658 sd_default_probe, NULL, NULL);
3659 }
1da177e4
LT		 3660
3661 if (!majors)
3662 return -ENODEV;
3663
5e4009ba
JG		 3664 err = class_register(&sd_disk_class);
3665 if (err)
3666 goto err_out;
6bdaa1f1 3667
4e7392ec
MP		 3668 sd_cdb_cache = kmem_cache_create("sd_ext_cdb", SD_EXT_CDB_SIZE,
3669 0, 0, NULL);
3670 if (!sd_cdb_cache) {
3671 printk(KERN_ERR "sd: can't init extended cdb cache\n");
8d964478 3672 err = -ENOMEM;
4e7392ec
MP		 3673 goto err_out_class;
3674 }
3675
3676 sd_cdb_pool = mempool_create_slab_pool(SD_MEMPOOL_SIZE, sd_cdb_cache);
3677 if (!sd_cdb_pool) {
3678 printk(KERN_ERR "sd: can't init extended cdb pool\n");
8d964478 3679 err = -ENOMEM;
4e7392ec
MP		 3680 goto err_out_cache;
3681 }
3682
61cce6f6
JA		 3683 sd_page_pool = mempool_create_page_pool(SD_MEMPOOL_SIZE, 0);
3684 if (!sd_page_pool) {
3685 printk(KERN_ERR "sd: can't init discard page pool\n");
3686 err = -ENOMEM;
3687 goto err_out_ppool;
3688 }
3689
afd5e34b
JD		 3690 err = scsi_register_driver(&sd_template.gendrv);
3691 if (err)
3692 goto err_out_driver;
3693
5e4009ba
JG		 3694 return 0;
3695
afd5e34b 3696err_out_driver:
61cce6f6
JA		 3697 mempool_destroy(sd_page_pool);
3698
3699err_out_ppool:
afd5e34b
JD		 3700 mempool_destroy(sd_cdb_pool);
3701
4e7392ec
MP		 3702err_out_cache:
3703 kmem_cache_destroy(sd_cdb_cache);
3704
5e4009ba
JG		 3705err_out_class:
3706 class_unregister(&sd_disk_class);
3707err_out:
3708 for (i = 0; i < SD_MAJORS; i++)
3709 unregister_blkdev(sd_major(i), "sd");
3710 return err;
1da177e4
LT		 3711}
3712
3713/**
3714 * exit_sd - exit point for this driver (when it is a module).
3715 *
3716 * Note: this function unregisters this driver from the scsi mid-level.
3717 **/
3718static void __exit exit_sd(void)
3719{
3720 int i;
3721
3722 SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n"));
3723
afd5e34b 3724 scsi_unregister_driver(&sd_template.gendrv);
4e7392ec 3725 mempool_destroy(sd_cdb_pool);
61cce6f6 3726 mempool_destroy(sd_page_pool);
4e7392ec
MP		 3727 kmem_cache_destroy(sd_cdb_cache);
3728
5e4009ba
JG		 3729 class_unregister(&sd_disk_class);
3730
0761df9c
HR		 3731 for (i = 0; i < SD_MAJORS; i++) {
3732 blk_unregister_region(sd_major(i), SD_MINORS);
1da177e4 3733 unregister_blkdev(sd_major(i), "sd");
0761df9c 3734 }
1da177e4
LT		 3735}
3736
1da177e4
LT		 3737module_init(init_sd);
3738module_exit(exit_sd);
e73aec82
MP		 3739
3740static void sd_print_sense_hdr(struct scsi_disk *sdkp,
3741 struct scsi_sense_hdr *sshdr)
3742{
21045519
HR		 3743 scsi_print_sense_hdr(sdkp->device,
3744 sdkp->disk ? sdkp->disk->disk_name : NULL, sshdr);
e73aec82
MP		 3745}
3746
ef61329d
HR		 3747static void sd_print_result(const struct scsi_disk *sdkp, const char *msg,
3748 int result)
e73aec82 3749{
ef61329d
HR		 3750 const char *hb_string = scsi_hostbyte_string(result);
3751 const char *db_string = scsi_driverbyte_string(result);
3752
3753 if (hb_string || db_string)
3754 sd_printk(KERN_INFO, sdkp,
3755 "%s: Result: hostbyte=%s driverbyte=%s\n", msg,
3756 hb_string ? hb_string : "invalid",
3757 db_string ? db_string : "invalid");
3758 else
3759 sd_printk(KERN_INFO, sdkp,
3760 "%s: Result: hostbyte=0x%02x driverbyte=0x%02x\n",
3761 msg, host_byte(result), driver_byte(result));
e73aec82
MP		 3762}
3763
Linux 6.x block layer and io_uring tree(s)