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09c434b8 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1da177e4 LT |
2 | /* |
3 | * sd.c Copyright (C) 1992 Drew Eckhardt | |
4 | * Copyright (C) 1993, 1994, 1995, 1999 Eric Youngdale | |
5 | * | |
6 | * Linux scsi disk driver | |
7 | * Initial versions: Drew Eckhardt | |
8 | * Subsequent revisions: Eric Youngdale | |
9 | * Modification history: | |
10 | * - Drew Eckhardt <drew@colorado.edu> original | |
11 | * - Eric Youngdale <eric@andante.org> add scatter-gather, multiple | |
12 | * outstanding request, and other enhancements. | |
13 | * Support loadable low-level scsi drivers. | |
14 | * - Jirka Hanika <geo@ff.cuni.cz> support more scsi disks using | |
15 | * eight major numbers. | |
16 | * - Richard Gooch <rgooch@atnf.csiro.au> support devfs. | |
17 | * - Torben Mathiasen <tmm@image.dk> Resource allocation fixes in | |
18 | * sd_init and cleanups. | |
19 | * - Alex Davis <letmein@erols.com> Fix problem where partition info | |
20 | * not being read in sd_open. Fix problem where removable media | |
21 | * could be ejected after sd_open. | |
22 | * - Douglas Gilbert <dgilbert@interlog.com> cleanup for lk 2.5.x | |
23 | * - Badari Pulavarty <pbadari@us.ibm.com>, Matthew Wilcox | |
24 | * <willy@debian.org>, Kurt Garloff <garloff@suse.de>: | |
25 | * Support 32k/1M disks. | |
26 | * | |
27 | * Logging policy (needs CONFIG_SCSI_LOGGING defined): | |
28 | * - setting up transfer: SCSI_LOG_HLQUEUE levels 1 and 2 | |
29 | * - end of transfer (bh + scsi_lib): SCSI_LOG_HLCOMPLETE level 1 | |
30 | * - entering sd_ioctl: SCSI_LOG_IOCTL level 1 | |
31 | * - entering other commands: SCSI_LOG_HLQUEUE level 3 | |
32 | * Note: when the logging level is set by the user, it must be greater | |
33 | * than the level indicated above to trigger output. | |
34 | */ | |
35 | ||
da042a36 | 36 | #include <linux/bio-integrity.h> |
1da177e4 LT |
37 | #include <linux/module.h> |
38 | #include <linux/fs.h> | |
39 | #include <linux/kernel.h> | |
1da177e4 | 40 | #include <linux/mm.h> |
1da177e4 LT |
41 | #include <linux/hdreg.h> |
42 | #include <linux/errno.h> | |
43 | #include <linux/idr.h> | |
44 | #include <linux/interrupt.h> | |
45 | #include <linux/init.h> | |
46 | #include <linux/blkdev.h> | |
47 | #include <linux/blkpg.h> | |
bca6b067 | 48 | #include <linux/blk-pm.h> |
1da177e4 | 49 | #include <linux/delay.h> |
4f53138f | 50 | #include <linux/rw_hint.h> |
b81e0c23 | 51 | #include <linux/major.h> |
0b950672 | 52 | #include <linux/mutex.h> |
7404ad3b | 53 | #include <linux/string_helpers.h> |
5a0e3ad6 | 54 | #include <linux/slab.h> |
d80210f2 | 55 | #include <linux/sed-opal.h> |
54f57588 | 56 | #include <linux/pm_runtime.h> |
924d55b0 | 57 | #include <linux/pr.h> |
8475c811 | 58 | #include <linux/t10-pi.h> |
7c0f6ba6 | 59 | #include <linux/uaccess.h> |
5f60d5f6 | 60 | #include <linux/unaligned.h> |
1da177e4 LT |
61 | |
62 | #include <scsi/scsi.h> | |
63 | #include <scsi/scsi_cmnd.h> | |
64 | #include <scsi/scsi_dbg.h> | |
65 | #include <scsi/scsi_device.h> | |
633aeefa | 66 | #include <scsi/scsi_devinfo.h> |
1da177e4 LT |
67 | #include <scsi/scsi_driver.h> |
68 | #include <scsi/scsi_eh.h> | |
69 | #include <scsi/scsi_host.h> | |
70 | #include <scsi/scsi_ioctl.h> | |
1da177e4 | 71 | #include <scsi/scsicam.h> |
0730b163 | 72 | #include <scsi/scsi_common.h> |
1da177e4 | 73 | |
aa91696e | 74 | #include "sd.h" |
a7a20d10 | 75 | #include "scsi_priv.h" |
1da177e4 LT |
76 | #include "scsi_logging.h" |
77 | ||
f018fa55 RH |
78 | MODULE_AUTHOR("Eric Youngdale"); |
79 | MODULE_DESCRIPTION("SCSI disk (sd) driver"); | |
80 | MODULE_LICENSE("GPL"); | |
81 | ||
82 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK0_MAJOR); | |
83 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK1_MAJOR); | |
84 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK2_MAJOR); | |
85 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK3_MAJOR); | |
86 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK4_MAJOR); | |
87 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK5_MAJOR); | |
88 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK6_MAJOR); | |
89 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK7_MAJOR); | |
90 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK8_MAJOR); | |
91 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK9_MAJOR); | |
92 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK10_MAJOR); | |
93 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK11_MAJOR); | |
94 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK12_MAJOR); | |
95 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK13_MAJOR); | |
96 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK14_MAJOR); | |
97 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK15_MAJOR); | |
d7b8bcb0 MT |
98 | MODULE_ALIAS_SCSI_DEVICE(TYPE_DISK); |
99 | MODULE_ALIAS_SCSI_DEVICE(TYPE_MOD); | |
100 | MODULE_ALIAS_SCSI_DEVICE(TYPE_RBC); | |
89d94756 | 101 | MODULE_ALIAS_SCSI_DEVICE(TYPE_ZBC); |
f018fa55 | 102 | |
f615b48c | 103 | #define SD_MINORS 16 |
870d6656 | 104 | |
804e498e CH |
105 | static void sd_config_discard(struct scsi_disk *sdkp, struct queue_limits *lim, |
106 | unsigned int mode); | |
107 | static void sd_config_write_same(struct scsi_disk *sdkp, | |
108 | struct queue_limits *lim); | |
7b3d9545 | 109 | static int sd_revalidate_disk(struct gendisk *); |
72ec24bd | 110 | static void sd_unlock_native_capacity(struct gendisk *disk); |
7b3d9545 | 111 | static void sd_shutdown(struct device *); |
ee959b00 | 112 | static void scsi_disk_release(struct device *cdev); |
7b3d9545 | 113 | |
f27bac27 | 114 | static DEFINE_IDA(sd_index_ida); |
1da177e4 | 115 | |
61cce6f6 | 116 | static mempool_t *sd_page_pool; |
9c2b9dba | 117 | static struct lock_class_key sd_bio_compl_lkclass; |
4e7392ec | 118 | |
6bdaa1f1 JB |
119 | static const char *sd_cache_types[] = { |
120 | "write through", "none", "write back", | |
121 | "write back, no read (daft)" | |
122 | }; | |
123 | ||
1122c0c1 CH |
124 | static void sd_set_flush_flag(struct scsi_disk *sdkp, |
125 | struct queue_limits *lim) | |
cb2fb68d | 126 | { |
cb2fb68d | 127 | if (sdkp->WCE) { |
1122c0c1 | 128 | lim->features |= BLK_FEAT_WRITE_CACHE; |
cb2fb68d | 129 | if (sdkp->DPOFUA) |
1122c0c1 CH |
130 | lim->features |= BLK_FEAT_FUA; |
131 | else | |
132 | lim->features &= ~BLK_FEAT_FUA; | |
133 | } else { | |
134 | lim->features &= ~(BLK_FEAT_WRITE_CACHE | BLK_FEAT_FUA); | |
cb2fb68d | 135 | } |
cb2fb68d VC |
136 | } |
137 | ||
ee959b00 | 138 | static ssize_t |
e1ea2351 GKH |
139 | cache_type_store(struct device *dev, struct device_attribute *attr, |
140 | const char *buf, size_t count) | |
6bdaa1f1 | 141 | { |
4c11712a | 142 | int ct, rcd, wce, sp; |
ee959b00 | 143 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
144 | struct scsi_device *sdp = sdkp->device; |
145 | char buffer[64]; | |
146 | char *buffer_data; | |
147 | struct scsi_mode_data data; | |
148 | struct scsi_sense_hdr sshdr; | |
2ee3e26c | 149 | static const char temp[] = "temporary "; |
c8b7ef36 | 150 | int len, ret; |
6bdaa1f1 | 151 | |
89d94756 | 152 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) |
6bdaa1f1 JB |
153 | /* no cache control on RBC devices; theoretically they |
154 | * can do it, but there's probably so many exceptions | |
155 | * it's not worth the risk */ | |
156 | return -EINVAL; | |
157 | ||
39c60a09 JB |
158 | if (strncmp(buf, temp, sizeof(temp) - 1) == 0) { |
159 | buf += sizeof(temp) - 1; | |
160 | sdkp->cache_override = 1; | |
161 | } else { | |
162 | sdkp->cache_override = 0; | |
163 | } | |
164 | ||
4c11712a | 165 | ct = sysfs_match_string(sd_cache_types, buf); |
6bdaa1f1 JB |
166 | if (ct < 0) |
167 | return -EINVAL; | |
4c11712a | 168 | |
6bdaa1f1 | 169 | rcd = ct & 0x01 ? 1 : 0; |
2eefd57b | 170 | wce = (ct & 0x02) && !sdkp->write_prot ? 1 : 0; |
39c60a09 JB |
171 | |
172 | if (sdkp->cache_override) { | |
1122c0c1 CH |
173 | struct queue_limits lim; |
174 | ||
39c60a09 JB |
175 | sdkp->WCE = wce; |
176 | sdkp->RCD = rcd; | |
1122c0c1 CH |
177 | |
178 | lim = queue_limits_start_update(sdkp->disk->queue); | |
179 | sd_set_flush_flag(sdkp, &lim); | |
aa427d7b CH |
180 | ret = queue_limits_commit_update_frozen(sdkp->disk->queue, |
181 | &lim); | |
1122c0c1 CH |
182 | if (ret) |
183 | return ret; | |
39c60a09 JB |
184 | return count; |
185 | } | |
186 | ||
a6cdc35f | 187 | if (scsi_mode_sense(sdp, 0x08, 8, 0, buffer, sizeof(buffer), SD_TIMEOUT, |
0610959f | 188 | sdkp->max_retries, &data, NULL)) |
6bdaa1f1 | 189 | return -EINVAL; |
a9312fb8 | 190 | len = min_t(size_t, sizeof(buffer), data.length - data.header_length - |
6bdaa1f1 JB |
191 | data.block_descriptor_length); |
192 | buffer_data = buffer + data.header_length + | |
193 | data.block_descriptor_length; | |
194 | buffer_data[2] &= ~0x05; | |
195 | buffer_data[2] |= wce << 2 | rcd; | |
196 | sp = buffer_data[0] & 0x80 ? 1 : 0; | |
2c5d16d6 | 197 | buffer_data[0] &= ~0x80; |
6bdaa1f1 | 198 | |
44759979 IM |
199 | /* |
200 | * Ensure WP, DPOFUA, and RESERVED fields are cleared in | |
201 | * received mode parameter buffer before doing MODE SELECT. | |
202 | */ | |
203 | data.device_specific = 0; | |
204 | ||
c8b7ef36 MC |
205 | ret = scsi_mode_select(sdp, 1, sp, buffer_data, len, SD_TIMEOUT, |
206 | sdkp->max_retries, &data, &sshdr); | |
207 | if (ret) { | |
208 | if (ret > 0 && scsi_sense_valid(&sshdr)) | |
e73aec82 | 209 | sd_print_sense_hdr(sdkp, &sshdr); |
6bdaa1f1 JB |
210 | return -EINVAL; |
211 | } | |
033a1b98 | 212 | sd_revalidate_disk(sdkp->disk); |
6bdaa1f1 JB |
213 | return count; |
214 | } | |
215 | ||
ee959b00 | 216 | static ssize_t |
3cc2ffe5 DLM |
217 | manage_start_stop_show(struct device *dev, |
218 | struct device_attribute *attr, char *buf) | |
e1ea2351 GKH |
219 | { |
220 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
221 | struct scsi_device *sdp = sdkp->device; | |
222 | ||
3cc2ffe5 DLM |
223 | return sysfs_emit(buf, "%u\n", |
224 | sdp->manage_system_start_stop && | |
24eca2dc DLM |
225 | sdp->manage_runtime_start_stop && |
226 | sdp->manage_shutdown); | |
e1ea2351 | 227 | } |
3cc2ffe5 | 228 | static DEVICE_ATTR_RO(manage_start_stop); |
e1ea2351 GKH |
229 | |
230 | static ssize_t | |
3cc2ffe5 DLM |
231 | manage_system_start_stop_show(struct device *dev, |
232 | struct device_attribute *attr, char *buf) | |
233 | { | |
234 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
235 | struct scsi_device *sdp = sdkp->device; | |
236 | ||
237 | return sysfs_emit(buf, "%u\n", sdp->manage_system_start_stop); | |
238 | } | |
239 | ||
240 | static ssize_t | |
241 | manage_system_start_stop_store(struct device *dev, | |
242 | struct device_attribute *attr, | |
243 | const char *buf, size_t count) | |
c3c94c5a | 244 | { |
ee959b00 | 245 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
c3c94c5a | 246 | struct scsi_device *sdp = sdkp->device; |
623401ee | 247 | bool v; |
c3c94c5a TH |
248 | |
249 | if (!capable(CAP_SYS_ADMIN)) | |
250 | return -EACCES; | |
251 | ||
623401ee | 252 | if (kstrtobool(buf, &v)) |
253 | return -EINVAL; | |
254 | ||
3cc2ffe5 | 255 | sdp->manage_system_start_stop = v; |
c3c94c5a TH |
256 | |
257 | return count; | |
258 | } | |
3cc2ffe5 DLM |
259 | static DEVICE_ATTR_RW(manage_system_start_stop); |
260 | ||
261 | static ssize_t | |
262 | manage_runtime_start_stop_show(struct device *dev, | |
263 | struct device_attribute *attr, char *buf) | |
264 | { | |
265 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
266 | struct scsi_device *sdp = sdkp->device; | |
267 | ||
268 | return sysfs_emit(buf, "%u\n", sdp->manage_runtime_start_stop); | |
269 | } | |
270 | ||
271 | static ssize_t | |
272 | manage_runtime_start_stop_store(struct device *dev, | |
273 | struct device_attribute *attr, | |
274 | const char *buf, size_t count) | |
275 | { | |
276 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
277 | struct scsi_device *sdp = sdkp->device; | |
278 | bool v; | |
279 | ||
280 | if (!capable(CAP_SYS_ADMIN)) | |
281 | return -EACCES; | |
282 | ||
283 | if (kstrtobool(buf, &v)) | |
284 | return -EINVAL; | |
285 | ||
286 | sdp->manage_runtime_start_stop = v; | |
287 | ||
288 | return count; | |
289 | } | |
290 | static DEVICE_ATTR_RW(manage_runtime_start_stop); | |
c3c94c5a | 291 | |
24eca2dc DLM |
292 | static ssize_t manage_shutdown_show(struct device *dev, |
293 | struct device_attribute *attr, char *buf) | |
294 | { | |
295 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
296 | struct scsi_device *sdp = sdkp->device; | |
297 | ||
298 | return sysfs_emit(buf, "%u\n", sdp->manage_shutdown); | |
299 | } | |
300 | ||
301 | static ssize_t manage_shutdown_store(struct device *dev, | |
302 | struct device_attribute *attr, | |
303 | const char *buf, size_t count) | |
304 | { | |
305 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
306 | struct scsi_device *sdp = sdkp->device; | |
307 | bool v; | |
308 | ||
309 | if (!capable(CAP_SYS_ADMIN)) | |
310 | return -EACCES; | |
311 | ||
312 | if (kstrtobool(buf, &v)) | |
313 | return -EINVAL; | |
314 | ||
315 | sdp->manage_shutdown = v; | |
316 | ||
317 | return count; | |
318 | } | |
319 | static DEVICE_ATTR_RW(manage_shutdown); | |
320 | ||
ee959b00 | 321 | static ssize_t |
e1ea2351 GKH |
322 | allow_restart_show(struct device *dev, struct device_attribute *attr, char *buf) |
323 | { | |
324 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
325 | ||
4c11712a | 326 | return sprintf(buf, "%u\n", sdkp->device->allow_restart); |
e1ea2351 GKH |
327 | } |
328 | ||
329 | static ssize_t | |
330 | allow_restart_store(struct device *dev, struct device_attribute *attr, | |
331 | const char *buf, size_t count) | |
a144c5ae | 332 | { |
658e9a6d | 333 | bool v; |
ee959b00 | 334 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
a144c5ae BK |
335 | struct scsi_device *sdp = sdkp->device; |
336 | ||
337 | if (!capable(CAP_SYS_ADMIN)) | |
338 | return -EACCES; | |
339 | ||
89d94756 | 340 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) |
a144c5ae BK |
341 | return -EINVAL; |
342 | ||
658e9a6d | 343 | if (kstrtobool(buf, &v)) |
344 | return -EINVAL; | |
345 | ||
346 | sdp->allow_restart = v; | |
a144c5ae BK |
347 | |
348 | return count; | |
349 | } | |
e1ea2351 | 350 | static DEVICE_ATTR_RW(allow_restart); |
a144c5ae | 351 | |
ee959b00 | 352 | static ssize_t |
e1ea2351 | 353 | cache_type_show(struct device *dev, struct device_attribute *attr, char *buf) |
6bdaa1f1 | 354 | { |
ee959b00 | 355 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
356 | int ct = sdkp->RCD + 2*sdkp->WCE; |
357 | ||
4c11712a | 358 | return sprintf(buf, "%s\n", sd_cache_types[ct]); |
6bdaa1f1 | 359 | } |
e1ea2351 | 360 | static DEVICE_ATTR_RW(cache_type); |
6bdaa1f1 | 361 | |
ee959b00 | 362 | static ssize_t |
e1ea2351 | 363 | FUA_show(struct device *dev, struct device_attribute *attr, char *buf) |
6bdaa1f1 | 364 | { |
ee959b00 | 365 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 | 366 | |
4c11712a | 367 | return sprintf(buf, "%u\n", sdkp->DPOFUA); |
6bdaa1f1 | 368 | } |
e1ea2351 | 369 | static DEVICE_ATTR_RO(FUA); |
6bdaa1f1 | 370 | |
ee959b00 | 371 | static ssize_t |
e1ea2351 GKH |
372 | protection_type_show(struct device *dev, struct device_attribute *attr, |
373 | char *buf) | |
e0597d70 MP |
374 | { |
375 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
376 | ||
4c11712a | 377 | return sprintf(buf, "%u\n", sdkp->protection_type); |
e0597d70 MP |
378 | } |
379 | ||
8172499a | 380 | static ssize_t |
e1ea2351 GKH |
381 | protection_type_store(struct device *dev, struct device_attribute *attr, |
382 | const char *buf, size_t count) | |
8172499a MP |
383 | { |
384 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
385 | unsigned int val; | |
386 | int err; | |
387 | ||
388 | if (!capable(CAP_SYS_ADMIN)) | |
389 | return -EACCES; | |
390 | ||
391 | err = kstrtouint(buf, 10, &val); | |
392 | ||
393 | if (err) | |
394 | return err; | |
395 | ||
830cc351 | 396 | if (val <= T10_PI_TYPE3_PROTECTION) |
8172499a MP |
397 | sdkp->protection_type = val; |
398 | ||
399 | return count; | |
400 | } | |
e1ea2351 | 401 | static DEVICE_ATTR_RW(protection_type); |
8172499a | 402 | |
518fa8e3 | 403 | static ssize_t |
e1ea2351 GKH |
404 | protection_mode_show(struct device *dev, struct device_attribute *attr, |
405 | char *buf) | |
518fa8e3 MP |
406 | { |
407 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
408 | struct scsi_device *sdp = sdkp->device; | |
409 | unsigned int dif, dix; | |
410 | ||
411 | dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type); | |
412 | dix = scsi_host_dix_capable(sdp->host, sdkp->protection_type); | |
413 | ||
8475c811 | 414 | if (!dix && scsi_host_dix_capable(sdp->host, T10_PI_TYPE0_PROTECTION)) { |
518fa8e3 MP |
415 | dif = 0; |
416 | dix = 1; | |
417 | } | |
418 | ||
419 | if (!dif && !dix) | |
4c11712a | 420 | return sprintf(buf, "none\n"); |
518fa8e3 | 421 | |
4c11712a | 422 | return sprintf(buf, "%s%u\n", dix ? "dix" : "dif", dif); |
518fa8e3 | 423 | } |
e1ea2351 | 424 | static DEVICE_ATTR_RO(protection_mode); |
518fa8e3 | 425 | |
e0597d70 | 426 | static ssize_t |
e1ea2351 | 427 | app_tag_own_show(struct device *dev, struct device_attribute *attr, char *buf) |
e0597d70 MP |
428 | { |
429 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
430 | ||
4c11712a | 431 | return sprintf(buf, "%u\n", sdkp->ATO); |
e0597d70 | 432 | } |
e1ea2351 | 433 | static DEVICE_ATTR_RO(app_tag_own); |
e0597d70 | 434 | |
e339c1a7 | 435 | static ssize_t |
e1ea2351 GKH |
436 | thin_provisioning_show(struct device *dev, struct device_attribute *attr, |
437 | char *buf) | |
e339c1a7 MP |
438 | { |
439 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
440 | ||
4c11712a | 441 | return sprintf(buf, "%u\n", sdkp->lbpme); |
c98a0eb0 | 442 | } |
e1ea2351 | 443 | static DEVICE_ATTR_RO(thin_provisioning); |
c98a0eb0 | 444 | |
4c11712a | 445 | /* sysfs_match_string() requires dense arrays */ |
c98a0eb0 MP |
446 | static const char *lbp_mode[] = { |
447 | [SD_LBP_FULL] = "full", | |
448 | [SD_LBP_UNMAP] = "unmap", | |
449 | [SD_LBP_WS16] = "writesame_16", | |
450 | [SD_LBP_WS10] = "writesame_10", | |
451 | [SD_LBP_ZERO] = "writesame_zero", | |
452 | [SD_LBP_DISABLE] = "disabled", | |
453 | }; | |
454 | ||
455 | static ssize_t | |
e1ea2351 GKH |
456 | provisioning_mode_show(struct device *dev, struct device_attribute *attr, |
457 | char *buf) | |
c98a0eb0 MP |
458 | { |
459 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
460 | ||
4c11712a | 461 | return sprintf(buf, "%s\n", lbp_mode[sdkp->provisioning_mode]); |
c98a0eb0 MP |
462 | } |
463 | ||
464 | static ssize_t | |
e1ea2351 GKH |
465 | provisioning_mode_store(struct device *dev, struct device_attribute *attr, |
466 | const char *buf, size_t count) | |
c98a0eb0 MP |
467 | { |
468 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
469 | struct scsi_device *sdp = sdkp->device; | |
804e498e CH |
470 | struct queue_limits lim; |
471 | int mode, err; | |
c98a0eb0 MP |
472 | |
473 | if (!capable(CAP_SYS_ADMIN)) | |
474 | return -EACCES; | |
475 | ||
476 | if (sdp->type != TYPE_DISK) | |
477 | return -EINVAL; | |
478 | ||
4c11712a MP |
479 | mode = sysfs_match_string(lbp_mode, buf); |
480 | if (mode < 0) | |
c98a0eb0 MP |
481 | return -EINVAL; |
482 | ||
804e498e CH |
483 | lim = queue_limits_start_update(sdkp->disk->queue); |
484 | sd_config_discard(sdkp, &lim, mode); | |
aa427d7b | 485 | err = queue_limits_commit_update_frozen(sdkp->disk->queue, &lim); |
804e498e CH |
486 | if (err) |
487 | return err; | |
c98a0eb0 | 488 | return count; |
e339c1a7 | 489 | } |
e1ea2351 | 490 | static DEVICE_ATTR_RW(provisioning_mode); |
e339c1a7 | 491 | |
4c11712a | 492 | /* sysfs_match_string() requires dense arrays */ |
e6bd9312 MP |
493 | static const char *zeroing_mode[] = { |
494 | [SD_ZERO_WRITE] = "write", | |
495 | [SD_ZERO_WS] = "writesame", | |
496 | [SD_ZERO_WS16_UNMAP] = "writesame_16_unmap", | |
497 | [SD_ZERO_WS10_UNMAP] = "writesame_10_unmap", | |
498 | }; | |
499 | ||
500 | static ssize_t | |
501 | zeroing_mode_show(struct device *dev, struct device_attribute *attr, | |
502 | char *buf) | |
503 | { | |
504 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
505 | ||
4c11712a | 506 | return sprintf(buf, "%s\n", zeroing_mode[sdkp->zeroing_mode]); |
e6bd9312 MP |
507 | } |
508 | ||
509 | static ssize_t | |
510 | zeroing_mode_store(struct device *dev, struct device_attribute *attr, | |
511 | const char *buf, size_t count) | |
512 | { | |
513 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
4c11712a | 514 | int mode; |
e6bd9312 MP |
515 | |
516 | if (!capable(CAP_SYS_ADMIN)) | |
517 | return -EACCES; | |
518 | ||
4c11712a MP |
519 | mode = sysfs_match_string(zeroing_mode, buf); |
520 | if (mode < 0) | |
e6bd9312 MP |
521 | return -EINVAL; |
522 | ||
4c11712a MP |
523 | sdkp->zeroing_mode = mode; |
524 | ||
e6bd9312 MP |
525 | return count; |
526 | } | |
527 | static DEVICE_ATTR_RW(zeroing_mode); | |
528 | ||
18a4d0a2 | 529 | static ssize_t |
e1ea2351 GKH |
530 | max_medium_access_timeouts_show(struct device *dev, |
531 | struct device_attribute *attr, char *buf) | |
18a4d0a2 MP |
532 | { |
533 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
534 | ||
4c11712a | 535 | return sprintf(buf, "%u\n", sdkp->max_medium_access_timeouts); |
18a4d0a2 MP |
536 | } |
537 | ||
538 | static ssize_t | |
e1ea2351 GKH |
539 | max_medium_access_timeouts_store(struct device *dev, |
540 | struct device_attribute *attr, const char *buf, | |
541 | size_t count) | |
18a4d0a2 MP |
542 | { |
543 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
544 | int err; | |
545 | ||
546 | if (!capable(CAP_SYS_ADMIN)) | |
547 | return -EACCES; | |
548 | ||
549 | err = kstrtouint(buf, 10, &sdkp->max_medium_access_timeouts); | |
550 | ||
551 | return err ? err : count; | |
552 | } | |
e1ea2351 | 553 | static DEVICE_ATTR_RW(max_medium_access_timeouts); |
18a4d0a2 | 554 | |
5db44863 | 555 | static ssize_t |
e1ea2351 GKH |
556 | max_write_same_blocks_show(struct device *dev, struct device_attribute *attr, |
557 | char *buf) | |
5db44863 MP |
558 | { |
559 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
560 | ||
4c11712a | 561 | return sprintf(buf, "%u\n", sdkp->max_ws_blocks); |
5db44863 MP |
562 | } |
563 | ||
564 | static ssize_t | |
e1ea2351 GKH |
565 | max_write_same_blocks_store(struct device *dev, struct device_attribute *attr, |
566 | const char *buf, size_t count) | |
5db44863 MP |
567 | { |
568 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
569 | struct scsi_device *sdp = sdkp->device; | |
804e498e | 570 | struct queue_limits lim; |
5db44863 MP |
571 | unsigned long max; |
572 | int err; | |
573 | ||
574 | if (!capable(CAP_SYS_ADMIN)) | |
575 | return -EACCES; | |
576 | ||
89d94756 | 577 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) |
5db44863 MP |
578 | return -EINVAL; |
579 | ||
580 | err = kstrtoul(buf, 10, &max); | |
581 | ||
582 | if (err) | |
583 | return err; | |
584 | ||
585 | if (max == 0) | |
586 | sdp->no_write_same = 1; | |
66c28f97 MP |
587 | else if (max <= SD_MAX_WS16_BLOCKS) { |
588 | sdp->no_write_same = 0; | |
5db44863 | 589 | sdkp->max_ws_blocks = max; |
66c28f97 | 590 | } |
5db44863 | 591 | |
804e498e CH |
592 | lim = queue_limits_start_update(sdkp->disk->queue); |
593 | sd_config_write_same(sdkp, &lim); | |
aa427d7b | 594 | err = queue_limits_commit_update_frozen(sdkp->disk->queue, &lim); |
804e498e CH |
595 | if (err) |
596 | return err; | |
5db44863 MP |
597 | return count; |
598 | } | |
e1ea2351 GKH |
599 | static DEVICE_ATTR_RW(max_write_same_blocks); |
600 | ||
c5f88522 DLM |
601 | static ssize_t |
602 | zoned_cap_show(struct device *dev, struct device_attribute *attr, char *buf) | |
603 | { | |
604 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
605 | ||
606 | if (sdkp->device->type == TYPE_ZBC) | |
607 | return sprintf(buf, "host-managed\n"); | |
608 | if (sdkp->zoned == 1) | |
609 | return sprintf(buf, "host-aware\n"); | |
610 | if (sdkp->zoned == 2) | |
611 | return sprintf(buf, "drive-managed\n"); | |
612 | return sprintf(buf, "none\n"); | |
613 | } | |
614 | static DEVICE_ATTR_RO(zoned_cap); | |
615 | ||
0610959f MC |
616 | static ssize_t |
617 | max_retries_store(struct device *dev, struct device_attribute *attr, | |
618 | const char *buf, size_t count) | |
619 | { | |
620 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
621 | struct scsi_device *sdev = sdkp->device; | |
622 | int retries, err; | |
623 | ||
624 | err = kstrtoint(buf, 10, &retries); | |
625 | if (err) | |
626 | return err; | |
627 | ||
628 | if (retries == SCSI_CMD_RETRIES_NO_LIMIT || retries <= SD_MAX_RETRIES) { | |
629 | sdkp->max_retries = retries; | |
630 | return count; | |
631 | } | |
632 | ||
633 | sdev_printk(KERN_ERR, sdev, "max_retries must be between -1 and %d\n", | |
634 | SD_MAX_RETRIES); | |
635 | return -EINVAL; | |
636 | } | |
637 | ||
638 | static ssize_t | |
639 | max_retries_show(struct device *dev, struct device_attribute *attr, | |
640 | char *buf) | |
641 | { | |
642 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
643 | ||
644 | return sprintf(buf, "%d\n", sdkp->max_retries); | |
645 | } | |
646 | ||
647 | static DEVICE_ATTR_RW(max_retries); | |
648 | ||
e1ea2351 GKH |
649 | static struct attribute *sd_disk_attrs[] = { |
650 | &dev_attr_cache_type.attr, | |
651 | &dev_attr_FUA.attr, | |
652 | &dev_attr_allow_restart.attr, | |
653 | &dev_attr_manage_start_stop.attr, | |
3cc2ffe5 DLM |
654 | &dev_attr_manage_system_start_stop.attr, |
655 | &dev_attr_manage_runtime_start_stop.attr, | |
24eca2dc | 656 | &dev_attr_manage_shutdown.attr, |
e1ea2351 GKH |
657 | &dev_attr_protection_type.attr, |
658 | &dev_attr_protection_mode.attr, | |
659 | &dev_attr_app_tag_own.attr, | |
660 | &dev_attr_thin_provisioning.attr, | |
661 | &dev_attr_provisioning_mode.attr, | |
e6bd9312 | 662 | &dev_attr_zeroing_mode.attr, |
e1ea2351 GKH |
663 | &dev_attr_max_write_same_blocks.attr, |
664 | &dev_attr_max_medium_access_timeouts.attr, | |
c5f88522 | 665 | &dev_attr_zoned_cap.attr, |
0610959f | 666 | &dev_attr_max_retries.attr, |
e1ea2351 | 667 | NULL, |
6bdaa1f1 | 668 | }; |
e1ea2351 | 669 | ATTRIBUTE_GROUPS(sd_disk); |
6bdaa1f1 JB |
670 | |
671 | static struct class sd_disk_class = { | |
672 | .name = "scsi_disk", | |
ee959b00 | 673 | .dev_release = scsi_disk_release, |
e1ea2351 | 674 | .dev_groups = sd_disk_groups, |
6bdaa1f1 | 675 | }; |
1da177e4 | 676 | |
0761df9c | 677 | /* |
996e509b CH |
678 | * Don't request a new module, as that could deadlock in multipath |
679 | * environment. | |
0761df9c | 680 | */ |
996e509b | 681 | static void sd_default_probe(dev_t devt) |
0761df9c | 682 | { |
0761df9c HR |
683 | } |
684 | ||
1da177e4 LT |
685 | /* |
686 | * Device no to disk mapping: | |
687 | * | |
688 | * major disc2 disc p1 | |
689 | * |............|.............|....|....| <- dev_t | |
690 | * 31 20 19 8 7 4 3 0 | |
691 | * | |
692 | * Inside a major, we have 16k disks, however mapped non- | |
693 | * contiguously. The first 16 disks are for major0, the next | |
694 | * ones with major1, ... Disk 256 is for major0 again, disk 272 | |
695 | * for major1, ... | |
696 | * As we stay compatible with our numbering scheme, we can reuse | |
697 | * the well-know SCSI majors 8, 65--71, 136--143. | |
698 | */ | |
699 | static int sd_major(int major_idx) | |
700 | { | |
701 | switch (major_idx) { | |
702 | case 0: | |
703 | return SCSI_DISK0_MAJOR; | |
704 | case 1 ... 7: | |
705 | return SCSI_DISK1_MAJOR + major_idx - 1; | |
706 | case 8 ... 15: | |
707 | return SCSI_DISK8_MAJOR + major_idx - 8; | |
708 | default: | |
709 | BUG(); | |
710 | return 0; /* shut up gcc */ | |
711 | } | |
712 | } | |
713 | ||
d80210f2 CH |
714 | #ifdef CONFIG_BLK_SED_OPAL |
715 | static int sd_sec_submit(void *data, u16 spsp, u8 secp, void *buffer, | |
716 | size_t len, bool send) | |
717 | { | |
0610959f MC |
718 | struct scsi_disk *sdkp = data; |
719 | struct scsi_device *sdev = sdkp->device; | |
d80210f2 | 720 | u8 cdb[12] = { 0, }; |
af16cd63 MC |
721 | const struct scsi_exec_args exec_args = { |
722 | .req_flags = BLK_MQ_REQ_PM, | |
723 | }; | |
d80210f2 CH |
724 | int ret; |
725 | ||
726 | cdb[0] = send ? SECURITY_PROTOCOL_OUT : SECURITY_PROTOCOL_IN; | |
727 | cdb[1] = secp; | |
728 | put_unaligned_be16(spsp, &cdb[2]); | |
729 | put_unaligned_be32(len, &cdb[6]); | |
730 | ||
af16cd63 MC |
731 | ret = scsi_execute_cmd(sdev, cdb, send ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN, |
732 | buffer, len, SD_TIMEOUT, sdkp->max_retries, | |
733 | &exec_args); | |
d80210f2 CH |
734 | return ret <= 0 ? ret : -EIO; |
735 | } | |
736 | #endif /* CONFIG_BLK_SED_OPAL */ | |
737 | ||
082c2cd2 JG |
738 | /* |
739 | * Look up the DIX operation based on whether the command is read or | |
740 | * write and whether dix and dif are enabled. | |
741 | */ | |
742 | static unsigned int sd_prot_op(bool write, bool dix, bool dif) | |
743 | { | |
744 | /* Lookup table: bit 2 (write), bit 1 (dix), bit 0 (dif) */ | |
745 | static const unsigned int ops[] = { /* wrt dix dif */ | |
746 | SCSI_PROT_NORMAL, /* 0 0 0 */ | |
747 | SCSI_PROT_READ_STRIP, /* 0 0 1 */ | |
748 | SCSI_PROT_READ_INSERT, /* 0 1 0 */ | |
749 | SCSI_PROT_READ_PASS, /* 0 1 1 */ | |
750 | SCSI_PROT_NORMAL, /* 1 0 0 */ | |
751 | SCSI_PROT_WRITE_INSERT, /* 1 0 1 */ | |
752 | SCSI_PROT_WRITE_STRIP, /* 1 1 0 */ | |
753 | SCSI_PROT_WRITE_PASS, /* 1 1 1 */ | |
754 | }; | |
755 | ||
756 | return ops[write << 2 | dix << 1 | dif]; | |
757 | } | |
758 | ||
759 | /* | |
760 | * Returns a mask of the protection flags that are valid for a given DIX | |
761 | * operation. | |
762 | */ | |
763 | static unsigned int sd_prot_flag_mask(unsigned int prot_op) | |
764 | { | |
765 | static const unsigned int flag_mask[] = { | |
766 | [SCSI_PROT_NORMAL] = 0, | |
767 | ||
768 | [SCSI_PROT_READ_STRIP] = SCSI_PROT_TRANSFER_PI | | |
769 | SCSI_PROT_GUARD_CHECK | | |
770 | SCSI_PROT_REF_CHECK | | |
771 | SCSI_PROT_REF_INCREMENT, | |
772 | ||
773 | [SCSI_PROT_READ_INSERT] = SCSI_PROT_REF_INCREMENT | | |
774 | SCSI_PROT_IP_CHECKSUM, | |
775 | ||
776 | [SCSI_PROT_READ_PASS] = SCSI_PROT_TRANSFER_PI | | |
777 | SCSI_PROT_GUARD_CHECK | | |
778 | SCSI_PROT_REF_CHECK | | |
779 | SCSI_PROT_REF_INCREMENT | | |
780 | SCSI_PROT_IP_CHECKSUM, | |
781 | ||
782 | [SCSI_PROT_WRITE_INSERT] = SCSI_PROT_TRANSFER_PI | | |
783 | SCSI_PROT_REF_INCREMENT, | |
784 | ||
785 | [SCSI_PROT_WRITE_STRIP] = SCSI_PROT_GUARD_CHECK | | |
786 | SCSI_PROT_REF_CHECK | | |
787 | SCSI_PROT_REF_INCREMENT | | |
788 | SCSI_PROT_IP_CHECKSUM, | |
789 | ||
790 | [SCSI_PROT_WRITE_PASS] = SCSI_PROT_TRANSFER_PI | | |
791 | SCSI_PROT_GUARD_CHECK | | |
792 | SCSI_PROT_REF_CHECK | | |
793 | SCSI_PROT_REF_INCREMENT | | |
794 | SCSI_PROT_IP_CHECKSUM, | |
795 | }; | |
796 | ||
797 | return flag_mask[prot_op]; | |
798 | } | |
799 | ||
c611529e MP |
800 | static unsigned char sd_setup_protect_cmnd(struct scsi_cmnd *scmd, |
801 | unsigned int dix, unsigned int dif) | |
35e1a5d9 | 802 | { |
5999ccff BVA |
803 | struct request *rq = scsi_cmd_to_rq(scmd); |
804 | struct bio *bio = rq->bio; | |
805 | unsigned int prot_op = sd_prot_op(rq_data_dir(rq), dix, dif); | |
c611529e MP |
806 | unsigned int protect = 0; |
807 | ||
808 | if (dix) { /* DIX Type 0, 1, 2, 3 */ | |
809 | if (bio_integrity_flagged(bio, BIP_IP_CHECKSUM)) | |
810 | scmd->prot_flags |= SCSI_PROT_IP_CHECKSUM; | |
811 | ||
18623503 | 812 | if (bio_integrity_flagged(bio, BIP_CHECK_GUARD)) |
c611529e MP |
813 | scmd->prot_flags |= SCSI_PROT_GUARD_CHECK; |
814 | } | |
815 | ||
8475c811 | 816 | if (dif != T10_PI_TYPE3_PROTECTION) { /* DIX/DIF Type 0, 1, 2 */ |
c611529e MP |
817 | scmd->prot_flags |= SCSI_PROT_REF_INCREMENT; |
818 | ||
18623503 | 819 | if (bio_integrity_flagged(bio, BIP_CHECK_REFTAG)) |
c611529e MP |
820 | scmd->prot_flags |= SCSI_PROT_REF_CHECK; |
821 | } | |
822 | ||
823 | if (dif) { /* DIX/DIF Type 1, 2, 3 */ | |
824 | scmd->prot_flags |= SCSI_PROT_TRANSFER_PI; | |
825 | ||
826 | if (bio_integrity_flagged(bio, BIP_DISK_NOCHECK)) | |
827 | protect = 3 << 5; /* Disable target PI checking */ | |
828 | else | |
829 | protect = 1 << 5; /* Enable target PI checking */ | |
35e1a5d9 MP |
830 | } |
831 | ||
832 | scsi_set_prot_op(scmd, prot_op); | |
833 | scsi_set_prot_type(scmd, dif); | |
c611529e MP |
834 | scmd->prot_flags &= sd_prot_flag_mask(prot_op); |
835 | ||
836 | return protect; | |
35e1a5d9 MP |
837 | } |
838 | ||
b0dadb86 CH |
839 | static void sd_disable_discard(struct scsi_disk *sdkp) |
840 | { | |
841 | sdkp->provisioning_mode = SD_LBP_DISABLE; | |
73e3715e | 842 | blk_queue_disable_discard(sdkp->disk->queue); |
b0dadb86 CH |
843 | } |
844 | ||
804e498e CH |
845 | static void sd_config_discard(struct scsi_disk *sdkp, struct queue_limits *lim, |
846 | unsigned int mode) | |
c98a0eb0 | 847 | { |
c98a0eb0 MP |
848 | unsigned int logical_block_size = sdkp->device->sector_size; |
849 | unsigned int max_blocks = 0; | |
850 | ||
804e498e CH |
851 | lim->discard_alignment = sdkp->unmap_alignment * logical_block_size; |
852 | lim->discard_granularity = max(sdkp->physical_block_size, | |
853 | sdkp->unmap_granularity * logical_block_size); | |
89730393 MP |
854 | sdkp->provisioning_mode = mode; |
855 | ||
c98a0eb0 MP |
856 | switch (mode) { |
857 | ||
4c11712a | 858 | case SD_LBP_FULL: |
c98a0eb0 | 859 | case SD_LBP_DISABLE: |
d15b9bd4 | 860 | break; |
c98a0eb0 MP |
861 | |
862 | case SD_LBP_UNMAP: | |
5db44863 MP |
863 | max_blocks = min_not_zero(sdkp->max_unmap_blocks, |
864 | (u32)SD_MAX_WS16_BLOCKS); | |
c98a0eb0 MP |
865 | break; |
866 | ||
867 | case SD_LBP_WS16: | |
28a0bc41 MP |
868 | if (sdkp->device->unmap_limit_for_ws) |
869 | max_blocks = sdkp->max_unmap_blocks; | |
870 | else | |
871 | max_blocks = sdkp->max_ws_blocks; | |
872 | ||
873 | max_blocks = min_not_zero(max_blocks, (u32)SD_MAX_WS16_BLOCKS); | |
c98a0eb0 MP |
874 | break; |
875 | ||
876 | case SD_LBP_WS10: | |
28a0bc41 MP |
877 | if (sdkp->device->unmap_limit_for_ws) |
878 | max_blocks = sdkp->max_unmap_blocks; | |
879 | else | |
880 | max_blocks = sdkp->max_ws_blocks; | |
881 | ||
882 | max_blocks = min_not_zero(max_blocks, (u32)SD_MAX_WS10_BLOCKS); | |
c98a0eb0 MP |
883 | break; |
884 | ||
885 | case SD_LBP_ZERO: | |
5db44863 MP |
886 | max_blocks = min_not_zero(sdkp->max_ws_blocks, |
887 | (u32)SD_MAX_WS10_BLOCKS); | |
c98a0eb0 MP |
888 | break; |
889 | } | |
890 | ||
804e498e CH |
891 | lim->max_hw_discard_sectors = max_blocks * |
892 | (logical_block_size >> SECTOR_SHIFT); | |
c98a0eb0 MP |
893 | } |
894 | ||
f1e117cb CH |
895 | static void *sd_set_special_bvec(struct request *rq, unsigned int data_len) |
896 | { | |
897 | struct page *page; | |
898 | ||
899 | page = mempool_alloc(sd_page_pool, GFP_ATOMIC); | |
900 | if (!page) | |
901 | return NULL; | |
902 | clear_highpage(page); | |
903 | bvec_set_page(&rq->special_vec, page, data_len, 0); | |
904 | rq->rq_flags |= RQF_SPECIAL_PAYLOAD; | |
905 | return bvec_virt(&rq->special_vec); | |
906 | } | |
907 | ||
159b2cbf | 908 | static blk_status_t sd_setup_unmap_cmnd(struct scsi_cmnd *cmd) |
e339c1a7 | 909 | { |
6a7b4398 | 910 | struct scsi_device *sdp = cmd->device; |
5999ccff | 911 | struct request *rq = scsi_cmd_to_rq(cmd); |
f3fa33ac | 912 | struct scsi_disk *sdkp = scsi_disk(rq->q->disk); |
c6c93fdd MP |
913 | u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq)); |
914 | u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq)); | |
81d926e8 | 915 | unsigned int data_len = 24; |
c98a0eb0 | 916 | char *buf; |
e339c1a7 | 917 | |
f1e117cb CH |
918 | buf = sd_set_special_bvec(rq, data_len); |
919 | if (!buf) | |
159b2cbf | 920 | return BLK_STS_RESOURCE; |
66ac0280 | 921 | |
81d926e8 CH |
922 | cmd->cmd_len = 10; |
923 | cmd->cmnd[0] = UNMAP; | |
924 | cmd->cmnd[8] = 24; | |
e339c1a7 | 925 | |
81d926e8 CH |
926 | put_unaligned_be16(6 + 16, &buf[0]); |
927 | put_unaligned_be16(16, &buf[2]); | |
c6c93fdd MP |
928 | put_unaligned_be64(lba, &buf[8]); |
929 | put_unaligned_be32(nr_blocks, &buf[16]); | |
e339c1a7 | 930 | |
0610959f | 931 | cmd->allowed = sdkp->max_retries; |
81d926e8 CH |
932 | cmd->transfersize = data_len; |
933 | rq->timeout = SD_TIMEOUT; | |
e339c1a7 | 934 | |
7007e9dd | 935 | return scsi_alloc_sgtables(cmd); |
81d926e8 | 936 | } |
c98a0eb0 | 937 | |
bf4ae8f2 JG |
938 | static void sd_config_atomic(struct scsi_disk *sdkp, struct queue_limits *lim) |
939 | { | |
940 | unsigned int logical_block_size = sdkp->device->sector_size, | |
941 | physical_block_size_sectors, max_atomic, unit_min, unit_max; | |
942 | ||
943 | if ((!sdkp->max_atomic && !sdkp->max_atomic_with_boundary) || | |
944 | sdkp->protection_type == T10_PI_TYPE2_PROTECTION) | |
945 | return; | |
946 | ||
947 | physical_block_size_sectors = sdkp->physical_block_size / | |
948 | sdkp->device->sector_size; | |
949 | ||
950 | unit_min = rounddown_pow_of_two(sdkp->atomic_granularity ? | |
951 | sdkp->atomic_granularity : | |
952 | physical_block_size_sectors); | |
953 | ||
954 | /* | |
955 | * Only use atomic boundary when we have the odd scenario of | |
956 | * sdkp->max_atomic == 0, which the spec does permit. | |
957 | */ | |
958 | if (sdkp->max_atomic) { | |
959 | max_atomic = sdkp->max_atomic; | |
960 | unit_max = rounddown_pow_of_two(sdkp->max_atomic); | |
961 | sdkp->use_atomic_write_boundary = 0; | |
962 | } else { | |
963 | max_atomic = sdkp->max_atomic_with_boundary; | |
964 | unit_max = rounddown_pow_of_two(sdkp->max_atomic_boundary); | |
965 | sdkp->use_atomic_write_boundary = 1; | |
966 | } | |
967 | ||
968 | /* | |
969 | * Ensure compliance with granularity and alignment. For now, keep it | |
970 | * simple and just don't support atomic writes for values mismatched | |
971 | * with max_{boundary}atomic, physical block size, and | |
972 | * atomic_granularity itself. | |
973 | * | |
974 | * We're really being distrustful by checking unit_max also... | |
975 | */ | |
976 | if (sdkp->atomic_granularity > 1) { | |
977 | if (unit_min > 1 && unit_min % sdkp->atomic_granularity) | |
978 | return; | |
979 | if (unit_max > 1 && unit_max % sdkp->atomic_granularity) | |
980 | return; | |
981 | } | |
982 | ||
983 | if (sdkp->atomic_alignment > 1) { | |
984 | if (unit_min > 1 && unit_min % sdkp->atomic_alignment) | |
985 | return; | |
986 | if (unit_max > 1 && unit_max % sdkp->atomic_alignment) | |
987 | return; | |
988 | } | |
989 | ||
990 | lim->atomic_write_hw_max = max_atomic * logical_block_size; | |
991 | lim->atomic_write_hw_boundary = 0; | |
992 | lim->atomic_write_hw_unit_min = unit_min * logical_block_size; | |
993 | lim->atomic_write_hw_unit_max = unit_max * logical_block_size; | |
6a7e17b2 | 994 | lim->features |= BLK_FEAT_ATOMIC_WRITES; |
bf4ae8f2 JG |
995 | } |
996 | ||
159b2cbf CH |
997 | static blk_status_t sd_setup_write_same16_cmnd(struct scsi_cmnd *cmd, |
998 | bool unmap) | |
81d926e8 CH |
999 | { |
1000 | struct scsi_device *sdp = cmd->device; | |
5999ccff | 1001 | struct request *rq = scsi_cmd_to_rq(cmd); |
f3fa33ac | 1002 | struct scsi_disk *sdkp = scsi_disk(rq->q->disk); |
c6c93fdd MP |
1003 | u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq)); |
1004 | u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq)); | |
81d926e8 | 1005 | u32 data_len = sdp->sector_size; |
c98a0eb0 | 1006 | |
f1e117cb | 1007 | if (!sd_set_special_bvec(rq, data_len)) |
159b2cbf | 1008 | return BLK_STS_RESOURCE; |
c98a0eb0 | 1009 | |
81d926e8 CH |
1010 | cmd->cmd_len = 16; |
1011 | cmd->cmnd[0] = WRITE_SAME_16; | |
02d26103 | 1012 | if (unmap) |
6a7b4398 | 1013 | cmd->cmnd[1] = 0x8; /* UNMAP */ |
c6c93fdd MP |
1014 | put_unaligned_be64(lba, &cmd->cmnd[2]); |
1015 | put_unaligned_be32(nr_blocks, &cmd->cmnd[10]); | |
66ac0280 | 1016 | |
0610959f | 1017 | cmd->allowed = sdkp->max_retries; |
81d926e8 | 1018 | cmd->transfersize = data_len; |
02d26103 | 1019 | rq->timeout = unmap ? SD_TIMEOUT : SD_WRITE_SAME_TIMEOUT; |
c98a0eb0 | 1020 | |
7007e9dd | 1021 | return scsi_alloc_sgtables(cmd); |
81d926e8 | 1022 | } |
c98a0eb0 | 1023 | |
159b2cbf CH |
1024 | static blk_status_t sd_setup_write_same10_cmnd(struct scsi_cmnd *cmd, |
1025 | bool unmap) | |
81d926e8 CH |
1026 | { |
1027 | struct scsi_device *sdp = cmd->device; | |
5999ccff | 1028 | struct request *rq = scsi_cmd_to_rq(cmd); |
f3fa33ac | 1029 | struct scsi_disk *sdkp = scsi_disk(rq->q->disk); |
c6c93fdd MP |
1030 | u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq)); |
1031 | u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq)); | |
81d926e8 | 1032 | u32 data_len = sdp->sector_size; |
c98a0eb0 | 1033 | |
f1e117cb | 1034 | if (!sd_set_special_bvec(rq, data_len)) |
159b2cbf | 1035 | return BLK_STS_RESOURCE; |
e339c1a7 | 1036 | |
81d926e8 CH |
1037 | cmd->cmd_len = 10; |
1038 | cmd->cmnd[0] = WRITE_SAME; | |
1039 | if (unmap) | |
1040 | cmd->cmnd[1] = 0x8; /* UNMAP */ | |
c6c93fdd MP |
1041 | put_unaligned_be32(lba, &cmd->cmnd[2]); |
1042 | put_unaligned_be16(nr_blocks, &cmd->cmnd[7]); | |
6a7b4398 | 1043 | |
0610959f | 1044 | cmd->allowed = sdkp->max_retries; |
81d926e8 | 1045 | cmd->transfersize = data_len; |
02d26103 | 1046 | rq->timeout = unmap ? SD_TIMEOUT : SD_WRITE_SAME_TIMEOUT; |
6a7b4398 | 1047 | |
7007e9dd | 1048 | return scsi_alloc_sgtables(cmd); |
f1126e95 | 1049 | } |
f9d03f96 | 1050 | |
159b2cbf | 1051 | static blk_status_t sd_setup_write_zeroes_cmnd(struct scsi_cmnd *cmd) |
02d26103 | 1052 | { |
5999ccff | 1053 | struct request *rq = scsi_cmd_to_rq(cmd); |
02d26103 | 1054 | struct scsi_device *sdp = cmd->device; |
f3fa33ac | 1055 | struct scsi_disk *sdkp = scsi_disk(rq->q->disk); |
c6c93fdd MP |
1056 | u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq)); |
1057 | u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq)); | |
02d26103 | 1058 | |
e4b87837 | 1059 | if (!(rq->cmd_flags & REQ_NOUNMAP)) { |
e6bd9312 MP |
1060 | switch (sdkp->zeroing_mode) { |
1061 | case SD_ZERO_WS16_UNMAP: | |
39051dd8 | 1062 | return sd_setup_write_same16_cmnd(cmd, true); |
e6bd9312 | 1063 | case SD_ZERO_WS10_UNMAP: |
39051dd8 | 1064 | return sd_setup_write_same10_cmnd(cmd, true); |
e4b87837 CH |
1065 | } |
1066 | } | |
c98a0eb0 | 1067 | |
e5cc9002 EM |
1068 | if (sdp->no_write_same) { |
1069 | rq->rq_flags |= RQF_QUIET; | |
159b2cbf | 1070 | return BLK_STS_TARGET; |
e5cc9002 | 1071 | } |
ed44fd7f | 1072 | |
c6c93fdd | 1073 | if (sdkp->ws16 || lba > 0xffffffff || nr_blocks > 0xffff) |
39051dd8 | 1074 | return sd_setup_write_same16_cmnd(cmd, false); |
ed44fd7f | 1075 | |
39051dd8 | 1076 | return sd_setup_write_same10_cmnd(cmd, false); |
f1126e95 FT |
1077 | } |
1078 | ||
9972b8ce CH |
1079 | static void sd_disable_write_same(struct scsi_disk *sdkp) |
1080 | { | |
1081 | sdkp->device->no_write_same = 1; | |
1082 | sdkp->max_ws_blocks = 0; | |
73e3715e | 1083 | blk_queue_disable_write_zeroes(sdkp->disk->queue); |
9972b8ce CH |
1084 | } |
1085 | ||
804e498e CH |
1086 | static void sd_config_write_same(struct scsi_disk *sdkp, |
1087 | struct queue_limits *lim) | |
5db44863 | 1088 | { |
5db44863 | 1089 | unsigned int logical_block_size = sdkp->device->sector_size; |
5db44863 MP |
1090 | |
1091 | if (sdkp->device->no_write_same) { | |
1092 | sdkp->max_ws_blocks = 0; | |
1093 | goto out; | |
1094 | } | |
1095 | ||
1096 | /* Some devices can not handle block counts above 0xffff despite | |
1097 | * supporting WRITE SAME(16). Consequently we default to 64k | |
1098 | * blocks per I/O unless the device explicitly advertises a | |
1099 | * bigger limit. | |
1100 | */ | |
66c28f97 MP |
1101 | if (sdkp->max_ws_blocks > SD_MAX_WS10_BLOCKS) |
1102 | sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks, | |
1103 | (u32)SD_MAX_WS16_BLOCKS); | |
1104 | else if (sdkp->ws16 || sdkp->ws10 || sdkp->device->no_report_opcodes) | |
1105 | sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks, | |
1106 | (u32)SD_MAX_WS10_BLOCKS); | |
1107 | else { | |
1108 | sdkp->device->no_write_same = 1; | |
1109 | sdkp->max_ws_blocks = 0; | |
1110 | } | |
5db44863 | 1111 | |
e6bd9312 MP |
1112 | if (sdkp->lbprz && sdkp->lbpws) |
1113 | sdkp->zeroing_mode = SD_ZERO_WS16_UNMAP; | |
1114 | else if (sdkp->lbprz && sdkp->lbpws10) | |
1115 | sdkp->zeroing_mode = SD_ZERO_WS10_UNMAP; | |
1116 | else if (sdkp->max_ws_blocks) | |
1117 | sdkp->zeroing_mode = SD_ZERO_WS; | |
1118 | else | |
1119 | sdkp->zeroing_mode = SD_ZERO_WRITE; | |
1120 | ||
b7af62a9 DLM |
1121 | if (sdkp->max_ws_blocks && |
1122 | sdkp->physical_block_size > logical_block_size) { | |
1123 | /* | |
1124 | * Reporting a maximum number of blocks that is not aligned | |
1125 | * on the device physical size would cause a large write same | |
1126 | * request to be split into physically unaligned chunks by | |
e383e16e CH |
1127 | * __blkdev_issue_write_zeroes() even if the caller of this |
1128 | * functions took care to align the large request. So make sure | |
1129 | * the maximum reported is aligned to the device physical block | |
1130 | * size. This is only an optional optimization for regular | |
1131 | * disks, but this is mandatory to avoid failure of large write | |
1132 | * same requests directed at sequential write required zones of | |
1133 | * host-managed ZBC disks. | |
b7af62a9 DLM |
1134 | */ |
1135 | sdkp->max_ws_blocks = | |
1136 | round_down(sdkp->max_ws_blocks, | |
1137 | bytes_to_logical(sdkp->device, | |
1138 | sdkp->physical_block_size)); | |
1139 | } | |
1140 | ||
5db44863 | 1141 | out: |
804e498e CH |
1142 | lim->max_write_zeroes_sectors = |
1143 | sdkp->max_ws_blocks * (logical_block_size >> SECTOR_SHIFT); | |
5db44863 MP |
1144 | } |
1145 | ||
159b2cbf | 1146 | static blk_status_t sd_setup_flush_cmnd(struct scsi_cmnd *cmd) |
90467c29 | 1147 | { |
5999ccff | 1148 | struct request *rq = scsi_cmd_to_rq(cmd); |
f3fa33ac | 1149 | struct scsi_disk *sdkp = scsi_disk(rq->q->disk); |
a118c6c1 CH |
1150 | |
1151 | /* flush requests don't perform I/O, zero the S/G table */ | |
1152 | memset(&cmd->sdb, 0, sizeof(cmd->sdb)); | |
90467c29 | 1153 | |
42c59077 SK |
1154 | if (cmd->device->use_16_for_sync) { |
1155 | cmd->cmnd[0] = SYNCHRONIZE_CACHE_16; | |
1156 | cmd->cmd_len = 16; | |
1157 | } else { | |
1158 | cmd->cmnd[0] = SYNCHRONIZE_CACHE; | |
1159 | cmd->cmd_len = 10; | |
1160 | } | |
a118c6c1 | 1161 | cmd->transfersize = 0; |
0610959f | 1162 | cmd->allowed = sdkp->max_retries; |
a118c6c1 | 1163 | |
26b9fd8b | 1164 | rq->timeout = rq->q->rq_timeout * SD_FLUSH_TIMEOUT_MULTIPLIER; |
159b2cbf | 1165 | return BLK_STS_OK; |
90467c29 FT |
1166 | } |
1167 | ||
4f53138f BVA |
1168 | /** |
1169 | * sd_group_number() - Compute the GROUP NUMBER field | |
1170 | * @cmd: SCSI command for which to compute the value of the six-bit GROUP NUMBER | |
1171 | * field. | |
1172 | * | |
1173 | * From SBC-5 r05 (https://www.t10.org/cgi-bin/ac.pl?t=f&f=sbc5r05.pdf): | |
1174 | * 0: no relative lifetime. | |
1175 | * 1: shortest relative lifetime. | |
1176 | * 2: second shortest relative lifetime. | |
1177 | * 3 - 0x3d: intermediate relative lifetimes. | |
1178 | * 0x3e: second longest relative lifetime. | |
1179 | * 0x3f: longest relative lifetime. | |
1180 | */ | |
1181 | static u8 sd_group_number(struct scsi_cmnd *cmd) | |
1182 | { | |
1183 | const struct request *rq = scsi_cmd_to_rq(cmd); | |
1184 | struct scsi_disk *sdkp = scsi_disk(rq->q->disk); | |
1185 | ||
1186 | if (!sdkp->rscs) | |
1187 | return 0; | |
1188 | ||
61952bb7 CH |
1189 | return min3((u32)rq->bio->bi_write_hint, |
1190 | (u32)sdkp->permanent_stream_count, 0x3fu); | |
4f53138f BVA |
1191 | } |
1192 | ||
78a02f49 MP |
1193 | static blk_status_t sd_setup_rw32_cmnd(struct scsi_cmnd *cmd, bool write, |
1194 | sector_t lba, unsigned int nr_blocks, | |
e59e80cf | 1195 | unsigned char flags, unsigned int dld) |
1da177e4 | 1196 | { |
78a02f49 | 1197 | cmd->cmd_len = SD_EXT_CDB_SIZE; |
78a02f49 | 1198 | cmd->cmnd[0] = VARIABLE_LENGTH_CMD; |
4f53138f | 1199 | cmd->cmnd[6] = sd_group_number(cmd); |
78a02f49 MP |
1200 | cmd->cmnd[7] = 0x18; /* Additional CDB len */ |
1201 | cmd->cmnd[9] = write ? WRITE_32 : READ_32; | |
1202 | cmd->cmnd[10] = flags; | |
e59e80cf | 1203 | cmd->cmnd[11] = dld & 0x07; |
78a02f49 MP |
1204 | put_unaligned_be64(lba, &cmd->cmnd[12]); |
1205 | put_unaligned_be32(lba, &cmd->cmnd[20]); /* Expected Indirect LBA */ | |
1206 | put_unaligned_be32(nr_blocks, &cmd->cmnd[28]); | |
1207 | ||
1208 | return BLK_STS_OK; | |
1209 | } | |
1210 | ||
1211 | static blk_status_t sd_setup_rw16_cmnd(struct scsi_cmnd *cmd, bool write, | |
1212 | sector_t lba, unsigned int nr_blocks, | |
e59e80cf | 1213 | unsigned char flags, unsigned int dld) |
78a02f49 MP |
1214 | { |
1215 | cmd->cmd_len = 16; | |
1216 | cmd->cmnd[0] = write ? WRITE_16 : READ_16; | |
e59e80cf | 1217 | cmd->cmnd[1] = flags | ((dld >> 2) & 0x01); |
4f53138f | 1218 | cmd->cmnd[14] = ((dld & 0x03) << 6) | sd_group_number(cmd); |
78a02f49 MP |
1219 | cmd->cmnd[15] = 0; |
1220 | put_unaligned_be64(lba, &cmd->cmnd[2]); | |
1221 | put_unaligned_be32(nr_blocks, &cmd->cmnd[10]); | |
1222 | ||
1223 | return BLK_STS_OK; | |
1224 | } | |
1225 | ||
1226 | static blk_status_t sd_setup_rw10_cmnd(struct scsi_cmnd *cmd, bool write, | |
1227 | sector_t lba, unsigned int nr_blocks, | |
1228 | unsigned char flags) | |
1229 | { | |
1230 | cmd->cmd_len = 10; | |
1231 | cmd->cmnd[0] = write ? WRITE_10 : READ_10; | |
1232 | cmd->cmnd[1] = flags; | |
4f53138f | 1233 | cmd->cmnd[6] = sd_group_number(cmd); |
78a02f49 MP |
1234 | cmd->cmnd[9] = 0; |
1235 | put_unaligned_be32(lba, &cmd->cmnd[2]); | |
1236 | put_unaligned_be16(nr_blocks, &cmd->cmnd[7]); | |
1237 | ||
1238 | return BLK_STS_OK; | |
1239 | } | |
1240 | ||
1241 | static blk_status_t sd_setup_rw6_cmnd(struct scsi_cmnd *cmd, bool write, | |
1242 | sector_t lba, unsigned int nr_blocks, | |
1243 | unsigned char flags) | |
1244 | { | |
db5db4b9 BVA |
1245 | /* Avoid that 0 blocks gets translated into 256 blocks. */ |
1246 | if (WARN_ON_ONCE(nr_blocks == 0)) | |
1247 | return BLK_STS_IOERR; | |
1248 | ||
78a02f49 MP |
1249 | if (unlikely(flags & 0x8)) { |
1250 | /* | |
1251 | * This happens only if this drive failed 10byte rw | |
1252 | * command with ILLEGAL_REQUEST during operation and | |
1253 | * thus turned off use_10_for_rw. | |
1254 | */ | |
1255 | scmd_printk(KERN_ERR, cmd, "FUA write on READ/WRITE(6) drive\n"); | |
1256 | return BLK_STS_IOERR; | |
1257 | } | |
1258 | ||
1259 | cmd->cmd_len = 6; | |
1260 | cmd->cmnd[0] = write ? WRITE_6 : READ_6; | |
1261 | cmd->cmnd[1] = (lba >> 16) & 0x1f; | |
1262 | cmd->cmnd[2] = (lba >> 8) & 0xff; | |
1263 | cmd->cmnd[3] = lba & 0xff; | |
1264 | cmd->cmnd[4] = nr_blocks; | |
1265 | cmd->cmnd[5] = 0; | |
1266 | ||
1267 | return BLK_STS_OK; | |
1268 | } | |
1269 | ||
e59e80cf DLM |
1270 | /* |
1271 | * Check if a command has a duration limit set. If it does, and the target | |
1272 | * device supports CDL and the feature is enabled, return the limit | |
1273 | * descriptor index to use. Return 0 (no limit) otherwise. | |
1274 | */ | |
1275 | static int sd_cdl_dld(struct scsi_disk *sdkp, struct scsi_cmnd *scmd) | |
1276 | { | |
1277 | struct scsi_device *sdp = sdkp->device; | |
1278 | int hint; | |
1279 | ||
1280 | if (!sdp->cdl_supported || !sdp->cdl_enable) | |
1281 | return 0; | |
1282 | ||
1283 | /* | |
1284 | * Use "no limit" if the request ioprio does not specify a duration | |
1285 | * limit hint. | |
1286 | */ | |
1287 | hint = IOPRIO_PRIO_HINT(req_get_ioprio(scsi_cmd_to_rq(scmd))); | |
1288 | if (hint < IOPRIO_HINT_DEV_DURATION_LIMIT_1 || | |
1289 | hint > IOPRIO_HINT_DEV_DURATION_LIMIT_7) | |
1290 | return 0; | |
1291 | ||
1292 | return (hint - IOPRIO_HINT_DEV_DURATION_LIMIT_1) + 1; | |
1293 | } | |
1294 | ||
bf4ae8f2 JG |
1295 | static blk_status_t sd_setup_atomic_cmnd(struct scsi_cmnd *cmd, |
1296 | sector_t lba, unsigned int nr_blocks, | |
1297 | bool boundary, unsigned char flags) | |
1298 | { | |
1299 | cmd->cmd_len = 16; | |
1300 | cmd->cmnd[0] = WRITE_ATOMIC_16; | |
1301 | cmd->cmnd[1] = flags; | |
1302 | put_unaligned_be64(lba, &cmd->cmnd[2]); | |
1303 | put_unaligned_be16(nr_blocks, &cmd->cmnd[12]); | |
1304 | if (boundary) | |
1305 | put_unaligned_be16(nr_blocks, &cmd->cmnd[10]); | |
1306 | else | |
1307 | put_unaligned_be16(0, &cmd->cmnd[10]); | |
1308 | put_unaligned_be16(nr_blocks, &cmd->cmnd[12]); | |
1309 | cmd->cmnd[14] = 0; | |
1310 | cmd->cmnd[15] = 0; | |
1311 | ||
1312 | return BLK_STS_OK; | |
1313 | } | |
1314 | ||
cf64e5a5 | 1315 | static blk_status_t sd_setup_read_write_cmnd(struct scsi_cmnd *cmd) |
1da177e4 | 1316 | { |
5999ccff | 1317 | struct request *rq = scsi_cmd_to_rq(cmd); |
cf64e5a5 | 1318 | struct scsi_device *sdp = cmd->device; |
f3fa33ac | 1319 | struct scsi_disk *sdkp = scsi_disk(rq->q->disk); |
ec029758 | 1320 | sector_t lba = sectors_to_logical(sdp, blk_rq_pos(rq)); |
18351070 | 1321 | sector_t threshold; |
ec029758 | 1322 | unsigned int nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq)); |
ec029758 | 1323 | unsigned int mask = logical_to_sectors(sdp, 1) - 1; |
78a02f49 MP |
1324 | bool write = rq_data_dir(rq) == WRITE; |
1325 | unsigned char protect, fua; | |
e59e80cf | 1326 | unsigned int dld; |
159b2cbf | 1327 | blk_status_t ret; |
0cf9f4e5 XC |
1328 | unsigned int dif; |
1329 | bool dix; | |
7f9a6bc4 | 1330 | |
7007e9dd | 1331 | ret = scsi_alloc_sgtables(cmd); |
159b2cbf | 1332 | if (ret != BLK_STS_OK) |
39051dd8 | 1333 | return ret; |
7f9a6bc4 | 1334 | |
7007e9dd | 1335 | ret = BLK_STS_IOERR; |
e249e42d | 1336 | if (!scsi_device_online(sdp) || sdp->changed) { |
cf64e5a5 | 1337 | scmd_printk(KERN_ERR, cmd, "device offline or changed\n"); |
7007e9dd | 1338 | goto fail; |
1da177e4 LT |
1339 | } |
1340 | ||
f3fa33ac | 1341 | if (blk_rq_pos(rq) + blk_rq_sectors(rq) > get_capacity(rq->q->disk)) { |
cf64e5a5 | 1342 | scmd_printk(KERN_ERR, cmd, "access beyond end of device\n"); |
7007e9dd | 1343 | goto fail; |
e249e42d MP |
1344 | } |
1345 | ||
1346 | if ((blk_rq_pos(rq) & mask) || (blk_rq_sectors(rq) & mask)) { | |
cf64e5a5 | 1347 | scmd_printk(KERN_ERR, cmd, "request not aligned to the logical block size\n"); |
7007e9dd | 1348 | goto fail; |
1da177e4 | 1349 | } |
7f9a6bc4 | 1350 | |
a0899d4d | 1351 | /* |
ec029758 MP |
1352 | * Some SD card readers can't handle accesses which touch the |
1353 | * last one or two logical blocks. Split accesses as needed. | |
a0899d4d | 1354 | */ |
ec029758 | 1355 | threshold = sdkp->capacity - SD_LAST_BUGGY_SECTORS; |
18351070 | 1356 | |
c6c93fdd MP |
1357 | if (unlikely(sdp->last_sector_bug && lba + nr_blocks > threshold)) { |
1358 | if (lba < threshold) { | |
18351070 | 1359 | /* Access up to the threshold but not beyond */ |
c6c93fdd | 1360 | nr_blocks = threshold - lba; |
18351070 | 1361 | } else { |
ec029758 MP |
1362 | /* Access only a single logical block */ |
1363 | nr_blocks = 1; | |
18351070 LT |
1364 | } |
1365 | } | |
a0899d4d | 1366 | |
78a02f49 | 1367 | fua = rq->cmd_flags & REQ_FUA ? 0x8 : 0; |
cf64e5a5 BVA |
1368 | dix = scsi_prot_sg_count(cmd); |
1369 | dif = scsi_host_dif_capable(cmd->device->host, sdkp->protection_type); | |
e59e80cf | 1370 | dld = sd_cdl_dld(sdkp, cmd); |
1da177e4 | 1371 | |
c611529e | 1372 | if (dif || dix) |
cf64e5a5 | 1373 | protect = sd_setup_protect_cmnd(cmd, dix, dif); |
af55ff67 | 1374 | else |
4e7392ec MP |
1375 | protect = 0; |
1376 | ||
8475c811 | 1377 | if (protect && sdkp->protection_type == T10_PI_TYPE2_PROTECTION) { |
cf64e5a5 | 1378 | ret = sd_setup_rw32_cmnd(cmd, write, lba, nr_blocks, |
e59e80cf | 1379 | protect | fua, dld); |
0c150b30 | 1380 | } else if (rq->cmd_flags & REQ_ATOMIC) { |
bf4ae8f2 JG |
1381 | ret = sd_setup_atomic_cmnd(cmd, lba, nr_blocks, |
1382 | sdkp->use_atomic_write_boundary, | |
1383 | protect | fua); | |
c6c93fdd | 1384 | } else if (sdp->use_16_for_rw || (nr_blocks > 0xffff)) { |
cf64e5a5 | 1385 | ret = sd_setup_rw16_cmnd(cmd, write, lba, nr_blocks, |
e59e80cf | 1386 | protect | fua, dld); |
c6c93fdd | 1387 | } else if ((nr_blocks > 0xff) || (lba > 0x1fffff) || |
61952bb7 | 1388 | sdp->use_10_for_rw || protect || rq->bio->bi_write_hint) { |
cf64e5a5 | 1389 | ret = sd_setup_rw10_cmnd(cmd, write, lba, nr_blocks, |
78a02f49 | 1390 | protect | fua); |
1da177e4 | 1391 | } else { |
cf64e5a5 | 1392 | ret = sd_setup_rw6_cmnd(cmd, write, lba, nr_blocks, |
78a02f49 | 1393 | protect | fua); |
1da177e4 | 1394 | } |
78a02f49 MP |
1395 | |
1396 | if (unlikely(ret != BLK_STS_OK)) | |
7007e9dd | 1397 | goto fail; |
1da177e4 LT |
1398 | |
1399 | /* | |
1400 | * We shouldn't disconnect in the middle of a sector, so with a dumb | |
1401 | * host adapter, it's safe to assume that we can at least transfer | |
1402 | * this many bytes between each connect / disconnect. | |
1403 | */ | |
cf64e5a5 BVA |
1404 | cmd->transfersize = sdp->sector_size; |
1405 | cmd->underflow = nr_blocks << 9; | |
0610959f | 1406 | cmd->allowed = sdkp->max_retries; |
cf64e5a5 | 1407 | cmd->sdb.length = nr_blocks * sdp->sector_size; |
e249e42d MP |
1408 | |
1409 | SCSI_LOG_HLQUEUE(1, | |
cf64e5a5 | 1410 | scmd_printk(KERN_INFO, cmd, |
e249e42d MP |
1411 | "%s: block=%llu, count=%d\n", __func__, |
1412 | (unsigned long long)blk_rq_pos(rq), | |
1413 | blk_rq_sectors(rq))); | |
1414 | SCSI_LOG_HLQUEUE(2, | |
cf64e5a5 | 1415 | scmd_printk(KERN_INFO, cmd, |
e249e42d MP |
1416 | "%s %d/%u 512 byte blocks.\n", |
1417 | write ? "writing" : "reading", nr_blocks, | |
1418 | blk_rq_sectors(rq))); | |
1da177e4 | 1419 | |
1da177e4 | 1420 | /* |
7007e9dd | 1421 | * This indicates that the command is ready from our end to be queued. |
1da177e4 | 1422 | */ |
159b2cbf | 1423 | return BLK_STS_OK; |
7007e9dd CH |
1424 | fail: |
1425 | scsi_free_sgtables(cmd); | |
1426 | return ret; | |
1da177e4 LT |
1427 | } |
1428 | ||
159b2cbf | 1429 | static blk_status_t sd_init_command(struct scsi_cmnd *cmd) |
87949eee | 1430 | { |
5999ccff | 1431 | struct request *rq = scsi_cmd_to_rq(cmd); |
87949eee | 1432 | |
c2df40df MC |
1433 | switch (req_op(rq)) { |
1434 | case REQ_OP_DISCARD: | |
f3fa33ac | 1435 | switch (scsi_disk(rq->q->disk)->provisioning_mode) { |
81d926e8 CH |
1436 | case SD_LBP_UNMAP: |
1437 | return sd_setup_unmap_cmnd(cmd); | |
1438 | case SD_LBP_WS16: | |
02d26103 | 1439 | return sd_setup_write_same16_cmnd(cmd, true); |
81d926e8 CH |
1440 | case SD_LBP_WS10: |
1441 | return sd_setup_write_same10_cmnd(cmd, true); | |
1442 | case SD_LBP_ZERO: | |
1443 | return sd_setup_write_same10_cmnd(cmd, false); | |
1444 | default: | |
159b2cbf | 1445 | return BLK_STS_TARGET; |
81d926e8 | 1446 | } |
02d26103 CH |
1447 | case REQ_OP_WRITE_ZEROES: |
1448 | return sd_setup_write_zeroes_cmnd(cmd); | |
3a5e02ce | 1449 | case REQ_OP_FLUSH: |
87949eee | 1450 | return sd_setup_flush_cmnd(cmd); |
c2df40df MC |
1451 | case REQ_OP_READ: |
1452 | case REQ_OP_WRITE: | |
87949eee | 1453 | return sd_setup_read_write_cmnd(cmd); |
89d94756 | 1454 | case REQ_OP_ZONE_RESET: |
ad512f20 AJ |
1455 | return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_RESET_WRITE_POINTER, |
1456 | false); | |
d81e9d49 | 1457 | case REQ_OP_ZONE_RESET_ALL: |
ad512f20 AJ |
1458 | return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_RESET_WRITE_POINTER, |
1459 | true); | |
1460 | case REQ_OP_ZONE_OPEN: | |
1461 | return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_OPEN_ZONE, false); | |
1462 | case REQ_OP_ZONE_CLOSE: | |
1463 | return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_CLOSE_ZONE, false); | |
1464 | case REQ_OP_ZONE_FINISH: | |
1465 | return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_FINISH_ZONE, false); | |
c2df40df | 1466 | default: |
f1f1fada | 1467 | WARN_ON_ONCE(1); |
159b2cbf | 1468 | return BLK_STS_NOTSUPP; |
c2df40df | 1469 | } |
87949eee CH |
1470 | } |
1471 | ||
1472 | static void sd_uninit_command(struct scsi_cmnd *SCpnt) | |
1473 | { | |
5999ccff | 1474 | struct request *rq = scsi_cmd_to_rq(SCpnt); |
87949eee | 1475 | |
f9d03f96 | 1476 | if (rq->rq_flags & RQF_SPECIAL_PAYLOAD) |
61cce6f6 | 1477 | mempool_free(rq->special_vec.bv_page, sd_page_pool); |
87949eee CH |
1478 | } |
1479 | ||
444aa2c5 | 1480 | static bool sd_need_revalidate(struct gendisk *disk, struct scsi_disk *sdkp) |
d1b7f920 CH |
1481 | { |
1482 | if (sdkp->device->removable || sdkp->write_prot) { | |
444aa2c5 | 1483 | if (disk_check_media_change(disk)) |
d1b7f920 CH |
1484 | return true; |
1485 | } | |
1486 | ||
1487 | /* | |
1488 | * Force a full rescan after ioctl(BLKRRPART). While the disk state has | |
1489 | * nothing to do with partitions, BLKRRPART is used to force a full | |
1490 | * revalidate after things like a format for historical reasons. | |
1491 | */ | |
444aa2c5 | 1492 | return test_bit(GD_NEED_PART_SCAN, &disk->state); |
d1b7f920 CH |
1493 | } |
1494 | ||
1da177e4 LT |
1495 | /** |
1496 | * sd_open - open a scsi disk device | |
d32e2bf8 | 1497 | * @disk: disk to open |
05bdb996 | 1498 | * @mode: open mode |
1da177e4 LT |
1499 | * |
1500 | * Returns 0 if successful. Returns a negated errno value in case | |
1501 | * of error. | |
1502 | * | |
1503 | * Note: This can be called from a user context (e.g. fsck(1) ) | |
1504 | * or from within the kernel (e.g. as a result of a mount(1) ). | |
1505 | * In the latter case @inode and @filp carry an abridged amount | |
1506 | * of information as noted above. | |
409f3499 | 1507 | * |
d32e2bf8 | 1508 | * Locking: called with disk->open_mutex held. |
1da177e4 | 1509 | **/ |
05bdb996 | 1510 | static int sd_open(struct gendisk *disk, blk_mode_t mode) |
1da177e4 | 1511 | { |
d32e2bf8 | 1512 | struct scsi_disk *sdkp = scsi_disk(disk); |
9c63f7f6 | 1513 | struct scsi_device *sdev = sdkp->device; |
1da177e4 LT |
1514 | int retval; |
1515 | ||
9c63f7f6 | 1516 | if (scsi_device_get(sdev)) |
1da177e4 LT |
1517 | return -ENXIO; |
1518 | ||
fa0d34be | 1519 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_open\n")); |
1da177e4 | 1520 | |
1da177e4 LT |
1521 | /* |
1522 | * If the device is in error recovery, wait until it is done. | |
1523 | * If the device is offline, then disallow any access to it. | |
1524 | */ | |
1525 | retval = -ENXIO; | |
1526 | if (!scsi_block_when_processing_errors(sdev)) | |
1527 | goto error_out; | |
1528 | ||
d32e2bf8 CH |
1529 | if (sd_need_revalidate(disk, sdkp)) |
1530 | sd_revalidate_disk(disk); | |
1da177e4 LT |
1531 | |
1532 | /* | |
1533 | * If the drive is empty, just let the open fail. | |
1534 | */ | |
1535 | retval = -ENOMEDIUM; | |
05bdb996 CH |
1536 | if (sdev->removable && !sdkp->media_present && |
1537 | !(mode & BLK_OPEN_NDELAY)) | |
1da177e4 LT |
1538 | goto error_out; |
1539 | ||
1540 | /* | |
1541 | * If the device has the write protect tab set, have the open fail | |
1542 | * if the user expects to be able to write to the thing. | |
1543 | */ | |
1544 | retval = -EROFS; | |
05bdb996 | 1545 | if (sdkp->write_prot && (mode & BLK_OPEN_WRITE)) |
1da177e4 LT |
1546 | goto error_out; |
1547 | ||
1548 | /* | |
1549 | * It is possible that the disk changing stuff resulted in | |
1550 | * the device being taken offline. If this is the case, | |
1551 | * report this to the user, and don't pretend that the | |
1552 | * open actually succeeded. | |
1553 | */ | |
1554 | retval = -ENXIO; | |
1555 | if (!scsi_device_online(sdev)) | |
1556 | goto error_out; | |
1557 | ||
409f3499 | 1558 | if ((atomic_inc_return(&sdkp->openers) == 1) && sdev->removable) { |
1da177e4 LT |
1559 | if (scsi_block_when_processing_errors(sdev)) |
1560 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT); | |
1561 | } | |
1562 | ||
1563 | return 0; | |
1564 | ||
1565 | error_out: | |
9c63f7f6 | 1566 | scsi_device_put(sdev); |
1da177e4 LT |
1567 | return retval; |
1568 | } | |
1569 | ||
1570 | /** | |
1571 | * sd_release - invoked when the (last) close(2) is called on this | |
1572 | * scsi disk. | |
7529fbb0 | 1573 | * @disk: disk to release |
1da177e4 LT |
1574 | * |
1575 | * Returns 0. | |
1576 | * | |
1577 | * Note: may block (uninterruptible) if error recovery is underway | |
1578 | * on this disk. | |
409f3499 | 1579 | * |
05bdb996 | 1580 | * Locking: called with disk->open_mutex held. |
1da177e4 | 1581 | **/ |
ae220766 | 1582 | static void sd_release(struct gendisk *disk) |
1da177e4 | 1583 | { |
1da177e4 LT |
1584 | struct scsi_disk *sdkp = scsi_disk(disk); |
1585 | struct scsi_device *sdev = sdkp->device; | |
1586 | ||
56937f7b | 1587 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_release\n")); |
1da177e4 | 1588 | |
7e443312 | 1589 | if (atomic_dec_return(&sdkp->openers) == 0 && sdev->removable) { |
1da177e4 LT |
1590 | if (scsi_block_when_processing_errors(sdev)) |
1591 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW); | |
1592 | } | |
1593 | ||
9c63f7f6 | 1594 | scsi_device_put(sdev); |
1da177e4 LT |
1595 | } |
1596 | ||
a885c8c4 | 1597 | static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
1da177e4 LT |
1598 | { |
1599 | struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk); | |
1600 | struct scsi_device *sdp = sdkp->device; | |
1601 | struct Scsi_Host *host = sdp->host; | |
f08bb1e0 | 1602 | sector_t capacity = logical_to_sectors(sdp, sdkp->capacity); |
1da177e4 LT |
1603 | int diskinfo[4]; |
1604 | ||
1605 | /* default to most commonly used values */ | |
f08bb1e0 MP |
1606 | diskinfo[0] = 0x40; /* 1 << 6 */ |
1607 | diskinfo[1] = 0x20; /* 1 << 5 */ | |
1608 | diskinfo[2] = capacity >> 11; | |
1609 | ||
1da177e4 LT |
1610 | /* override with calculated, extended default, or driver values */ |
1611 | if (host->hostt->bios_param) | |
f08bb1e0 | 1612 | host->hostt->bios_param(sdp, bdev, capacity, diskinfo); |
1da177e4 | 1613 | else |
f08bb1e0 | 1614 | scsicam_bios_param(bdev, capacity, diskinfo); |
1da177e4 | 1615 | |
a885c8c4 CH |
1616 | geo->heads = diskinfo[0]; |
1617 | geo->sectors = diskinfo[1]; | |
1618 | geo->cylinders = diskinfo[2]; | |
1da177e4 LT |
1619 | return 0; |
1620 | } | |
1621 | ||
1622 | /** | |
44328310 | 1623 | * sd_ioctl - process an ioctl |
7529fbb0 | 1624 | * @bdev: target block device |
05bdb996 | 1625 | * @mode: open mode |
1da177e4 | 1626 | * @cmd: ioctl command number |
44328310 | 1627 | * @arg: this is third argument given to ioctl(2) system call. |
1da177e4 LT |
1628 | * Often contains a pointer. |
1629 | * | |
25985edc | 1630 | * Returns 0 if successful (some ioctls return positive numbers on |
1da177e4 LT |
1631 | * success as well). Returns a negated errno value in case of error. |
1632 | * | |
1633 | * Note: most ioctls are forward onto the block subsystem or further | |
3a4fa0a2 | 1634 | * down in the scsi subsystem. |
1da177e4 | 1635 | **/ |
05bdb996 | 1636 | static int sd_ioctl(struct block_device *bdev, blk_mode_t mode, |
44328310 | 1637 | unsigned int cmd, unsigned long arg) |
1da177e4 | 1638 | { |
1da177e4 | 1639 | struct gendisk *disk = bdev->bd_disk; |
fe2d1851 NN |
1640 | struct scsi_disk *sdkp = scsi_disk(disk); |
1641 | struct scsi_device *sdp = sdkp->device; | |
44328310 | 1642 | void __user *p = (void __user *)arg; |
1da177e4 LT |
1643 | int error; |
1644 | ||
fe2d1851 NN |
1645 | SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO, sdkp, "sd_ioctl: disk=%s, " |
1646 | "cmd=0x%x\n", disk->disk_name, cmd)); | |
1da177e4 | 1647 | |
4f07bfc5 CH |
1648 | if (bdev_is_partition(bdev) && !capable(CAP_SYS_RAWIO)) |
1649 | return -ENOIOCTLCMD; | |
0bfc96cb | 1650 | |
1da177e4 LT |
1651 | /* |
1652 | * If we are in the middle of error recovery, don't let anyone | |
1653 | * else try and use this device. Also, if error recovery fails, it | |
1654 | * may try and take the device offline, in which case all further | |
1655 | * access to the device is prohibited. | |
1656 | */ | |
906d15fb | 1657 | error = scsi_ioctl_block_when_processing_errors(sdp, cmd, |
05bdb996 | 1658 | (mode & BLK_OPEN_NDELAY)); |
906d15fb | 1659 | if (error) |
44328310 | 1660 | return error; |
1da177e4 | 1661 | |
d80210f2 CH |
1662 | if (is_sed_ioctl(cmd)) |
1663 | return sed_ioctl(sdkp->opal_dev, cmd, p); | |
05bdb996 | 1664 | return scsi_ioctl(sdp, mode & BLK_OPEN_WRITE, cmd, p); |
1da177e4 LT |
1665 | } |
1666 | ||
1667 | static void set_media_not_present(struct scsi_disk *sdkp) | |
1668 | { | |
2bae0093 TH |
1669 | if (sdkp->media_present) |
1670 | sdkp->device->changed = 1; | |
1671 | ||
1672 | if (sdkp->device->removable) { | |
1673 | sdkp->media_present = 0; | |
1674 | sdkp->capacity = 0; | |
1675 | } | |
1676 | } | |
1677 | ||
1678 | static int media_not_present(struct scsi_disk *sdkp, | |
1679 | struct scsi_sense_hdr *sshdr) | |
1680 | { | |
1681 | if (!scsi_sense_valid(sshdr)) | |
1682 | return 0; | |
1683 | ||
1684 | /* not invoked for commands that could return deferred errors */ | |
1685 | switch (sshdr->sense_key) { | |
1686 | case UNIT_ATTENTION: | |
1687 | case NOT_READY: | |
1688 | /* medium not present */ | |
1689 | if (sshdr->asc == 0x3A) { | |
1690 | set_media_not_present(sdkp); | |
1691 | return 1; | |
1692 | } | |
1693 | } | |
1694 | return 0; | |
1da177e4 LT |
1695 | } |
1696 | ||
1697 | /** | |
2bae0093 TH |
1698 | * sd_check_events - check media events |
1699 | * @disk: kernel device descriptor | |
1700 | * @clearing: disk events currently being cleared | |
1da177e4 | 1701 | * |
2bae0093 | 1702 | * Returns mask of DISK_EVENT_*. |
1da177e4 LT |
1703 | * |
1704 | * Note: this function is invoked from the block subsystem. | |
1705 | **/ | |
2bae0093 | 1706 | static unsigned int sd_check_events(struct gendisk *disk, unsigned int clearing) |
1da177e4 | 1707 | { |
9c63f7f6 | 1708 | struct scsi_disk *sdkp = disk->private_data; |
eb72d0bb | 1709 | struct scsi_device *sdp; |
1da177e4 | 1710 | int retval; |
41e70e30 | 1711 | bool disk_changed; |
1da177e4 | 1712 | |
eb72d0bb HR |
1713 | if (!sdkp) |
1714 | return 0; | |
1715 | ||
1716 | sdp = sdkp->device; | |
2bae0093 | 1717 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_check_events\n")); |
1da177e4 LT |
1718 | |
1719 | /* | |
1720 | * If the device is offline, don't send any commands - just pretend as | |
1721 | * if the command failed. If the device ever comes back online, we | |
1722 | * can deal with it then. It is only because of unrecoverable errors | |
1723 | * that we would ever take a device offline in the first place. | |
1724 | */ | |
285e9670 KS |
1725 | if (!scsi_device_online(sdp)) { |
1726 | set_media_not_present(sdkp); | |
285e9670 KS |
1727 | goto out; |
1728 | } | |
1da177e4 LT |
1729 | |
1730 | /* | |
1731 | * Using TEST_UNIT_READY enables differentiation between drive with | |
1732 | * no cartridge loaded - NOT READY, drive with changed cartridge - | |
1733 | * UNIT ATTENTION, or with same cartridge - GOOD STATUS. | |
1734 | * | |
1735 | * Drives that auto spin down. eg iomega jaz 1G, will be started | |
1736 | * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever | |
1737 | * sd_revalidate() is called. | |
1738 | */ | |
001aac25 | 1739 | if (scsi_block_when_processing_errors(sdp)) { |
6fa2b8f9 CH |
1740 | struct scsi_sense_hdr sshdr = { 0, }; |
1741 | ||
0610959f | 1742 | retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, sdkp->max_retries, |
6fa2b8f9 | 1743 | &sshdr); |
1da177e4 | 1744 | |
6fa2b8f9 | 1745 | /* failed to execute TUR, assume media not present */ |
ced202f7 | 1746 | if (retval < 0 || host_byte(retval)) { |
6fa2b8f9 CH |
1747 | set_media_not_present(sdkp); |
1748 | goto out; | |
1749 | } | |
1da177e4 | 1750 | |
6fa2b8f9 CH |
1751 | if (media_not_present(sdkp, &sshdr)) |
1752 | goto out; | |
1753 | } | |
2bae0093 | 1754 | |
1da177e4 LT |
1755 | /* |
1756 | * For removable scsi disk we have to recognise the presence | |
2bae0093 | 1757 | * of a disk in the drive. |
1da177e4 | 1758 | */ |
2bae0093 TH |
1759 | if (!sdkp->media_present) |
1760 | sdp->changed = 1; | |
1da177e4 | 1761 | sdkp->media_present = 1; |
285e9670 | 1762 | out: |
3ff5588d | 1763 | /* |
2bae0093 | 1764 | * sdp->changed is set under the following conditions: |
3ff5588d | 1765 | * |
2bae0093 TH |
1766 | * Medium present state has changed in either direction. |
1767 | * Device has indicated UNIT_ATTENTION. | |
3ff5588d | 1768 | */ |
41e70e30 | 1769 | disk_changed = sdp->changed; |
2bae0093 | 1770 | sdp->changed = 0; |
41e70e30 | 1771 | return disk_changed ? DISK_EVENT_MEDIA_CHANGE : 0; |
1da177e4 LT |
1772 | } |
1773 | ||
3b834863 | 1774 | static int sd_sync_cache(struct scsi_disk *sdkp) |
1da177e4 | 1775 | { |
18305320 | 1776 | int res; |
e73aec82 | 1777 | struct scsi_device *sdp = sdkp->device; |
7e660100 JB |
1778 | const int timeout = sdp->request_queue->rq_timeout |
1779 | * SD_FLUSH_TIMEOUT_MULTIPLIER; | |
18305320 MC |
1780 | /* Leave the rest of the command zero to indicate flush everything. */ |
1781 | const unsigned char cmd[16] = { sdp->use_16_for_sync ? | |
1782 | SYNCHRONIZE_CACHE_16 : SYNCHRONIZE_CACHE }; | |
3b834863 | 1783 | struct scsi_sense_hdr sshdr; |
18305320 MC |
1784 | struct scsi_failure failure_defs[] = { |
1785 | { | |
1786 | .allowed = 3, | |
1787 | .result = SCMD_FAILURE_RESULT_ANY, | |
1788 | }, | |
1789 | {} | |
1790 | }; | |
1791 | struct scsi_failures failures = { | |
1792 | .failure_definitions = failure_defs, | |
1793 | }; | |
af16cd63 MC |
1794 | const struct scsi_exec_args exec_args = { |
1795 | .req_flags = BLK_MQ_REQ_PM, | |
3b834863 | 1796 | .sshdr = &sshdr, |
18305320 | 1797 | .failures = &failures, |
af16cd63 | 1798 | }; |
1da177e4 LT |
1799 | |
1800 | if (!scsi_device_online(sdp)) | |
1801 | return -ENODEV; | |
1802 | ||
18305320 MC |
1803 | res = scsi_execute_cmd(sdp, cmd, REQ_OP_DRV_IN, NULL, 0, timeout, |
1804 | sdkp->max_retries, &exec_args); | |
e73aec82 | 1805 | if (res) { |
ef61329d | 1806 | sd_print_result(sdkp, "Synchronize Cache(10) failed", res); |
95897910 | 1807 | |
ced202f7 HR |
1808 | if (res < 0) |
1809 | return res; | |
1810 | ||
464a00c9 | 1811 | if (scsi_status_is_check_condition(res) && |
3b834863 MC |
1812 | scsi_sense_valid(&sshdr)) { |
1813 | sd_print_sense_hdr(sdkp, &sshdr); | |
4fa83244 | 1814 | |
464a00c9 | 1815 | /* we need to evaluate the error return */ |
3b834863 MC |
1816 | if (sshdr.asc == 0x3a || /* medium not present */ |
1817 | sshdr.asc == 0x20 || /* invalid command */ | |
1818 | (sshdr.asc == 0x74 && sshdr.ascq == 0x71)) /* drive is password locked */ | |
95897910 ON |
1819 | /* this is no error here */ |
1820 | return 0; | |
4f9eedfa | 1821 | |
3b834863 | 1822 | /* |
4f9eedfa YL |
1823 | * If a format is in progress or if the drive does not |
1824 | * support sync, there is not much we can do because | |
1825 | * this is called during shutdown or suspend so just | |
1826 | * return success so those operations can proceed. | |
3b834863 | 1827 | */ |
4f9eedfa YL |
1828 | if ((sshdr.asc == 0x04 && sshdr.ascq == 0x04) || |
1829 | sshdr.sense_key == ILLEGAL_REQUEST) | |
3b834863 | 1830 | return 0; |
464a00c9 | 1831 | } |
95897910 ON |
1832 | |
1833 | switch (host_byte(res)) { | |
1834 | /* ignore errors due to racing a disconnection */ | |
1835 | case DID_BAD_TARGET: | |
1836 | case DID_NO_CONNECT: | |
1837 | return 0; | |
1838 | /* signal the upper layer it might try again */ | |
1839 | case DID_BUS_BUSY: | |
1840 | case DID_IMM_RETRY: | |
1841 | case DID_REQUEUE: | |
1842 | case DID_SOFT_ERROR: | |
1843 | return -EBUSY; | |
1844 | default: | |
1845 | return -EIO; | |
1846 | } | |
1da177e4 | 1847 | } |
3721050a | 1848 | return 0; |
1da177e4 LT |
1849 | } |
1850 | ||
1da177e4 LT |
1851 | static void sd_rescan(struct device *dev) |
1852 | { | |
3d9a1f53 | 1853 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
39b7f1e2 | 1854 | |
b200e38c | 1855 | sd_revalidate_disk(sdkp->disk); |
1da177e4 LT |
1856 | } |
1857 | ||
b83ce214 CH |
1858 | static int sd_get_unique_id(struct gendisk *disk, u8 id[16], |
1859 | enum blk_unique_id type) | |
1860 | { | |
1861 | struct scsi_device *sdev = scsi_disk(disk)->device; | |
1862 | const struct scsi_vpd *vpd; | |
1863 | const unsigned char *d; | |
1864 | int ret = -ENXIO, len; | |
1865 | ||
1866 | rcu_read_lock(); | |
1867 | vpd = rcu_dereference(sdev->vpd_pg83); | |
1868 | if (!vpd) | |
1869 | goto out_unlock; | |
1870 | ||
1871 | ret = -EINVAL; | |
1872 | for (d = vpd->data + 4; d < vpd->data + vpd->len; d += d[3] + 4) { | |
1873 | /* we only care about designators with LU association */ | |
1874 | if (((d[1] >> 4) & 0x3) != 0x00) | |
1875 | continue; | |
1876 | if ((d[1] & 0xf) != type) | |
1877 | continue; | |
1878 | ||
1879 | /* | |
1880 | * Only exit early if a 16-byte descriptor was found. Otherwise | |
1881 | * keep looking as one with more entropy might still show up. | |
1882 | */ | |
1883 | len = d[3]; | |
1884 | if (len != 8 && len != 12 && len != 16) | |
1885 | continue; | |
1886 | ret = len; | |
1887 | memcpy(id, d + 4, len); | |
1888 | if (len == 16) | |
1889 | break; | |
1890 | } | |
1891 | out_unlock: | |
1892 | rcu_read_unlock(); | |
1893 | return ret; | |
1894 | } | |
1895 | ||
04b3c8c0 MC |
1896 | static int sd_scsi_to_pr_err(struct scsi_sense_hdr *sshdr, int result) |
1897 | { | |
1898 | switch (host_byte(result)) { | |
1899 | case DID_TRANSPORT_MARGINAL: | |
1900 | case DID_TRANSPORT_DISRUPTED: | |
1901 | case DID_BUS_BUSY: | |
1902 | return PR_STS_RETRY_PATH_FAILURE; | |
1903 | case DID_NO_CONNECT: | |
1904 | return PR_STS_PATH_FAILED; | |
1905 | case DID_TRANSPORT_FAILFAST: | |
1906 | return PR_STS_PATH_FAST_FAILED; | |
1907 | } | |
1908 | ||
1909 | switch (status_byte(result)) { | |
1910 | case SAM_STAT_RESERVATION_CONFLICT: | |
1911 | return PR_STS_RESERVATION_CONFLICT; | |
1912 | case SAM_STAT_CHECK_CONDITION: | |
1913 | if (!scsi_sense_valid(sshdr)) | |
1914 | return PR_STS_IOERR; | |
1915 | ||
1916 | if (sshdr->sense_key == ILLEGAL_REQUEST && | |
1917 | (sshdr->asc == 0x26 || sshdr->asc == 0x24)) | |
1918 | return -EINVAL; | |
1919 | ||
1920 | fallthrough; | |
1921 | default: | |
1922 | return PR_STS_IOERR; | |
1923 | } | |
1924 | } | |
1925 | ||
0af7b5e2 MC |
1926 | static int sd_pr_in_command(struct block_device *bdev, u8 sa, |
1927 | unsigned char *data, int data_len) | |
1928 | { | |
1929 | struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk); | |
1930 | struct scsi_device *sdev = sdkp->device; | |
1931 | struct scsi_sense_hdr sshdr; | |
1932 | u8 cmd[10] = { PERSISTENT_RESERVE_IN, sa }; | |
eea6ef37 MC |
1933 | struct scsi_failure failure_defs[] = { |
1934 | { | |
1935 | .sense = UNIT_ATTENTION, | |
1936 | .asc = SCMD_FAILURE_ASC_ANY, | |
1937 | .ascq = SCMD_FAILURE_ASCQ_ANY, | |
1938 | .allowed = 5, | |
1939 | .result = SAM_STAT_CHECK_CONDITION, | |
1940 | }, | |
1941 | {} | |
1942 | }; | |
1943 | struct scsi_failures failures = { | |
1944 | .failure_definitions = failure_defs, | |
1945 | }; | |
0af7b5e2 MC |
1946 | const struct scsi_exec_args exec_args = { |
1947 | .sshdr = &sshdr, | |
eea6ef37 | 1948 | .failures = &failures, |
0af7b5e2 MC |
1949 | }; |
1950 | int result; | |
1951 | ||
1952 | put_unaligned_be16(data_len, &cmd[7]); | |
1953 | ||
1954 | result = scsi_execute_cmd(sdev, cmd, REQ_OP_DRV_IN, data, data_len, | |
1955 | SD_TIMEOUT, sdkp->max_retries, &exec_args); | |
1956 | if (scsi_status_is_check_condition(result) && | |
1957 | scsi_sense_valid(&sshdr)) { | |
1958 | sdev_printk(KERN_INFO, sdev, "PR command failed: %d\n", result); | |
1959 | scsi_print_sense_hdr(sdev, NULL, &sshdr); | |
1960 | } | |
1961 | ||
1962 | if (result <= 0) | |
1963 | return result; | |
1964 | ||
1965 | return sd_scsi_to_pr_err(&sshdr, result); | |
1966 | } | |
1967 | ||
1968 | static int sd_pr_read_keys(struct block_device *bdev, struct pr_keys *keys_info) | |
1969 | { | |
1970 | int result, i, data_offset, num_copy_keys; | |
1971 | u32 num_keys = keys_info->num_keys; | |
1972 | int data_len = num_keys * 8 + 8; | |
1973 | u8 *data; | |
1974 | ||
1975 | data = kzalloc(data_len, GFP_KERNEL); | |
1976 | if (!data) | |
1977 | return -ENOMEM; | |
1978 | ||
1979 | result = sd_pr_in_command(bdev, READ_KEYS, data, data_len); | |
1980 | if (result) | |
1981 | goto free_data; | |
1982 | ||
1983 | keys_info->generation = get_unaligned_be32(&data[0]); | |
1984 | keys_info->num_keys = get_unaligned_be32(&data[4]) / 8; | |
1985 | ||
1986 | data_offset = 8; | |
1987 | num_copy_keys = min(num_keys, keys_info->num_keys); | |
1988 | ||
1989 | for (i = 0; i < num_copy_keys; i++) { | |
1990 | keys_info->keys[i] = get_unaligned_be64(&data[data_offset]); | |
1991 | data_offset += 8; | |
1992 | } | |
1993 | ||
1994 | free_data: | |
1995 | kfree(data); | |
1996 | return result; | |
1997 | } | |
1998 | ||
1999 | static int sd_pr_read_reservation(struct block_device *bdev, | |
2000 | struct pr_held_reservation *rsv) | |
2001 | { | |
2002 | struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk); | |
2003 | struct scsi_device *sdev = sdkp->device; | |
2004 | u8 data[24] = { }; | |
2005 | int result, len; | |
2006 | ||
2007 | result = sd_pr_in_command(bdev, READ_RESERVATION, data, sizeof(data)); | |
2008 | if (result) | |
2009 | return result; | |
2010 | ||
2011 | len = get_unaligned_be32(&data[4]); | |
2012 | if (!len) | |
2013 | return 0; | |
2014 | ||
2015 | /* Make sure we have at least the key and type */ | |
2016 | if (len < 14) { | |
2017 | sdev_printk(KERN_INFO, sdev, | |
2018 | "READ RESERVATION failed due to short return buffer of %d bytes\n", | |
2019 | len); | |
2020 | return -EINVAL; | |
2021 | } | |
2022 | ||
2023 | rsv->generation = get_unaligned_be32(&data[0]); | |
2024 | rsv->key = get_unaligned_be64(&data[8]); | |
2025 | rsv->type = scsi_pr_type_to_block(data[21] & 0x0f); | |
2026 | return 0; | |
2027 | } | |
2028 | ||
0730b163 MC |
2029 | static int sd_pr_out_command(struct block_device *bdev, u8 sa, u64 key, |
2030 | u64 sa_key, enum scsi_pr_type type, u8 flags) | |
924d55b0 | 2031 | { |
0610959f MC |
2032 | struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk); |
2033 | struct scsi_device *sdev = sdkp->device; | |
924d55b0 | 2034 | struct scsi_sense_hdr sshdr; |
eea6ef37 MC |
2035 | struct scsi_failure failure_defs[] = { |
2036 | { | |
2037 | .sense = UNIT_ATTENTION, | |
2038 | .asc = SCMD_FAILURE_ASC_ANY, | |
2039 | .ascq = SCMD_FAILURE_ASCQ_ANY, | |
2040 | .allowed = 5, | |
2041 | .result = SAM_STAT_CHECK_CONDITION, | |
2042 | }, | |
2043 | {} | |
2044 | }; | |
2045 | struct scsi_failures failures = { | |
2046 | .failure_definitions = failure_defs, | |
2047 | }; | |
af16cd63 MC |
2048 | const struct scsi_exec_args exec_args = { |
2049 | .sshdr = &sshdr, | |
eea6ef37 | 2050 | .failures = &failures, |
af16cd63 | 2051 | }; |
924d55b0 CH |
2052 | int result; |
2053 | u8 cmd[16] = { 0, }; | |
2054 | u8 data[24] = { 0, }; | |
2055 | ||
2056 | cmd[0] = PERSISTENT_RESERVE_OUT; | |
2057 | cmd[1] = sa; | |
2058 | cmd[2] = type; | |
2059 | put_unaligned_be32(sizeof(data), &cmd[5]); | |
2060 | ||
2061 | put_unaligned_be64(key, &data[0]); | |
2062 | put_unaligned_be64(sa_key, &data[8]); | |
2063 | data[20] = flags; | |
2064 | ||
af16cd63 MC |
2065 | result = scsi_execute_cmd(sdev, cmd, REQ_OP_DRV_OUT, &data, |
2066 | sizeof(data), SD_TIMEOUT, sdkp->max_retries, | |
2067 | &exec_args); | |
924d55b0 | 2068 | |
464a00c9 | 2069 | if (scsi_status_is_check_condition(result) && |
c65be1a6 | 2070 | scsi_sense_valid(&sshdr)) { |
924d55b0 CH |
2071 | sdev_printk(KERN_INFO, sdev, "PR command failed: %d\n", result); |
2072 | scsi_print_sense_hdr(sdev, NULL, &sshdr); | |
2073 | } | |
2074 | ||
04b3c8c0 MC |
2075 | if (result <= 0) |
2076 | return result; | |
2077 | ||
2078 | return sd_scsi_to_pr_err(&sshdr, result); | |
924d55b0 CH |
2079 | } |
2080 | ||
2081 | static int sd_pr_register(struct block_device *bdev, u64 old_key, u64 new_key, | |
2082 | u32 flags) | |
2083 | { | |
2084 | if (flags & ~PR_FL_IGNORE_KEY) | |
2085 | return -EOPNOTSUPP; | |
20bebccb | 2086 | return sd_pr_out_command(bdev, (flags & PR_FL_IGNORE_KEY) ? 0x06 : 0x00, |
924d55b0 | 2087 | old_key, new_key, 0, |
01f90dd9 | 2088 | (1 << 0) /* APTPL */); |
924d55b0 CH |
2089 | } |
2090 | ||
2091 | static int sd_pr_reserve(struct block_device *bdev, u64 key, enum pr_type type, | |
2092 | u32 flags) | |
2093 | { | |
2094 | if (flags) | |
2095 | return -EOPNOTSUPP; | |
0730b163 MC |
2096 | return sd_pr_out_command(bdev, 0x01, key, 0, |
2097 | block_pr_type_to_scsi(type), 0); | |
924d55b0 CH |
2098 | } |
2099 | ||
2100 | static int sd_pr_release(struct block_device *bdev, u64 key, enum pr_type type) | |
2101 | { | |
0730b163 MC |
2102 | return sd_pr_out_command(bdev, 0x02, key, 0, |
2103 | block_pr_type_to_scsi(type), 0); | |
924d55b0 CH |
2104 | } |
2105 | ||
2106 | static int sd_pr_preempt(struct block_device *bdev, u64 old_key, u64 new_key, | |
2107 | enum pr_type type, bool abort) | |
2108 | { | |
20bebccb | 2109 | return sd_pr_out_command(bdev, abort ? 0x05 : 0x04, old_key, new_key, |
0730b163 | 2110 | block_pr_type_to_scsi(type), 0); |
924d55b0 CH |
2111 | } |
2112 | ||
2113 | static int sd_pr_clear(struct block_device *bdev, u64 key) | |
2114 | { | |
20bebccb | 2115 | return sd_pr_out_command(bdev, 0x03, key, 0, 0, 0); |
924d55b0 CH |
2116 | } |
2117 | ||
2118 | static const struct pr_ops sd_pr_ops = { | |
2119 | .pr_register = sd_pr_register, | |
2120 | .pr_reserve = sd_pr_reserve, | |
2121 | .pr_release = sd_pr_release, | |
2122 | .pr_preempt = sd_pr_preempt, | |
2123 | .pr_clear = sd_pr_clear, | |
0af7b5e2 MC |
2124 | .pr_read_keys = sd_pr_read_keys, |
2125 | .pr_read_reservation = sd_pr_read_reservation, | |
924d55b0 CH |
2126 | }; |
2127 | ||
9c63f7f6 CH |
2128 | static void scsi_disk_free_disk(struct gendisk *disk) |
2129 | { | |
2130 | struct scsi_disk *sdkp = scsi_disk(disk); | |
2131 | ||
2132 | put_device(&sdkp->disk_dev); | |
2133 | } | |
2134 | ||
83d5cde4 | 2135 | static const struct block_device_operations sd_fops = { |
1da177e4 | 2136 | .owner = THIS_MODULE, |
0338e291 AV |
2137 | .open = sd_open, |
2138 | .release = sd_release, | |
8a6cfeb6 | 2139 | .ioctl = sd_ioctl, |
a885c8c4 | 2140 | .getgeo = sd_getgeo, |
44328310 | 2141 | .compat_ioctl = blkdev_compat_ptr_ioctl, |
2bae0093 | 2142 | .check_events = sd_check_events, |
72ec24bd | 2143 | .unlock_native_capacity = sd_unlock_native_capacity, |
e76239a3 | 2144 | .report_zones = sd_zbc_report_zones, |
b83ce214 | 2145 | .get_unique_id = sd_get_unique_id, |
9c63f7f6 | 2146 | .free_disk = scsi_disk_free_disk, |
924d55b0 | 2147 | .pr_ops = &sd_pr_ops, |
1da177e4 LT |
2148 | }; |
2149 | ||
7a38dc0b HR |
2150 | /** |
2151 | * sd_eh_reset - reset error handling callback | |
2152 | * @scmd: sd-issued command that has failed | |
2153 | * | |
2154 | * This function is called by the SCSI midlayer before starting | |
2155 | * SCSI EH. When counting medium access failures we have to be | |
2156 | * careful to register it only only once per device and SCSI EH run; | |
2157 | * there might be several timed out commands which will cause the | |
2158 | * 'max_medium_access_timeouts' counter to trigger after the first | |
2159 | * SCSI EH run already and set the device to offline. | |
2160 | * So this function resets the internal counter before starting SCSI EH. | |
2161 | **/ | |
2162 | static void sd_eh_reset(struct scsi_cmnd *scmd) | |
2163 | { | |
f3fa33ac | 2164 | struct scsi_disk *sdkp = scsi_disk(scsi_cmd_to_rq(scmd)->q->disk); |
7a38dc0b HR |
2165 | |
2166 | /* New SCSI EH run, reset gate variable */ | |
2167 | sdkp->ignore_medium_access_errors = false; | |
2168 | } | |
2169 | ||
18a4d0a2 MP |
2170 | /** |
2171 | * sd_eh_action - error handling callback | |
2172 | * @scmd: sd-issued command that has failed | |
18a4d0a2 MP |
2173 | * @eh_disp: The recovery disposition suggested by the midlayer |
2174 | * | |
2451079b JB |
2175 | * This function is called by the SCSI midlayer upon completion of an |
2176 | * error test command (currently TEST UNIT READY). The result of sending | |
2177 | * the eh command is passed in eh_disp. We're looking for devices that | |
2178 | * fail medium access commands but are OK with non access commands like | |
2179 | * test unit ready (so wrongly see the device as having a successful | |
2180 | * recovery) | |
18a4d0a2 | 2181 | **/ |
2451079b | 2182 | static int sd_eh_action(struct scsi_cmnd *scmd, int eh_disp) |
18a4d0a2 | 2183 | { |
f3fa33ac | 2184 | struct scsi_disk *sdkp = scsi_disk(scsi_cmd_to_rq(scmd)->q->disk); |
0db6ca8a | 2185 | struct scsi_device *sdev = scmd->device; |
18a4d0a2 | 2186 | |
0db6ca8a | 2187 | if (!scsi_device_online(sdev) || |
2451079b JB |
2188 | !scsi_medium_access_command(scmd) || |
2189 | host_byte(scmd->result) != DID_TIME_OUT || | |
2190 | eh_disp != SUCCESS) | |
18a4d0a2 MP |
2191 | return eh_disp; |
2192 | ||
2193 | /* | |
2194 | * The device has timed out executing a medium access command. | |
2195 | * However, the TEST UNIT READY command sent during error | |
2196 | * handling completed successfully. Either the device is in the | |
2197 | * process of recovering or has it suffered an internal failure | |
2198 | * that prevents access to the storage medium. | |
2199 | */ | |
7a38dc0b HR |
2200 | if (!sdkp->ignore_medium_access_errors) { |
2201 | sdkp->medium_access_timed_out++; | |
2202 | sdkp->ignore_medium_access_errors = true; | |
2203 | } | |
18a4d0a2 MP |
2204 | |
2205 | /* | |
2206 | * If the device keeps failing read/write commands but TEST UNIT | |
2207 | * READY always completes successfully we assume that medium | |
2208 | * access is no longer possible and take the device offline. | |
2209 | */ | |
2210 | if (sdkp->medium_access_timed_out >= sdkp->max_medium_access_timeouts) { | |
2211 | scmd_printk(KERN_ERR, scmd, | |
2212 | "Medium access timeout failure. Offlining disk!\n"); | |
0db6ca8a BVA |
2213 | mutex_lock(&sdev->state_mutex); |
2214 | scsi_device_set_state(sdev, SDEV_OFFLINE); | |
2215 | mutex_unlock(&sdev->state_mutex); | |
18a4d0a2 | 2216 | |
e8f8d50e | 2217 | return SUCCESS; |
18a4d0a2 MP |
2218 | } |
2219 | ||
2220 | return eh_disp; | |
2221 | } | |
2222 | ||
af55ff67 MP |
2223 | static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd) |
2224 | { | |
5999ccff | 2225 | struct request *req = scsi_cmd_to_rq(scmd); |
6eadc612 DLM |
2226 | struct scsi_device *sdev = scmd->device; |
2227 | unsigned int transferred, good_bytes; | |
2228 | u64 start_lba, end_lba, bad_lba; | |
2229 | ||
a8733c7b | 2230 | /* |
6eadc612 DLM |
2231 | * Some commands have a payload smaller than the device logical |
2232 | * block size (e.g. INQUIRY on a 4K disk). | |
a8733c7b | 2233 | */ |
6eadc612 | 2234 | if (scsi_bufflen(scmd) <= sdev->sector_size) |
af55ff67 MP |
2235 | return 0; |
2236 | ||
6eadc612 DLM |
2237 | /* Check if we have a 'bad_lba' information */ |
2238 | if (!scsi_get_sense_info_fld(scmd->sense_buffer, | |
2239 | SCSI_SENSE_BUFFERSIZE, | |
2240 | &bad_lba)) | |
af55ff67 MP |
2241 | return 0; |
2242 | ||
6eadc612 DLM |
2243 | /* |
2244 | * If the bad lba was reported incorrectly, we have no idea where | |
af55ff67 MP |
2245 | * the error is. |
2246 | */ | |
6eadc612 DLM |
2247 | start_lba = sectors_to_logical(sdev, blk_rq_pos(req)); |
2248 | end_lba = start_lba + bytes_to_logical(sdev, scsi_bufflen(scmd)); | |
2249 | if (bad_lba < start_lba || bad_lba >= end_lba) | |
af55ff67 MP |
2250 | return 0; |
2251 | ||
6eadc612 DLM |
2252 | /* |
2253 | * resid is optional but mostly filled in. When it's unused, | |
2254 | * its value is zero, so we assume the whole buffer transferred | |
af55ff67 | 2255 | */ |
6eadc612 DLM |
2256 | transferred = scsi_bufflen(scmd) - scsi_get_resid(scmd); |
2257 | ||
2258 | /* This computation should always be done in terms of the | |
2259 | * resolution of the device's medium. | |
af55ff67 | 2260 | */ |
6eadc612 DLM |
2261 | good_bytes = logical_to_bytes(sdev, bad_lba - start_lba); |
2262 | ||
a8733c7b | 2263 | return min(good_bytes, transferred); |
af55ff67 MP |
2264 | } |
2265 | ||
1da177e4 | 2266 | /** |
7b3d9545 | 2267 | * sd_done - bottom half handler: called when the lower level |
1da177e4 LT |
2268 | * driver has completed (successfully or otherwise) a scsi command. |
2269 | * @SCpnt: mid-level's per command structure. | |
2270 | * | |
2271 | * Note: potentially run from within an ISR. Must not block. | |
2272 | **/ | |
7b3d9545 | 2273 | static int sd_done(struct scsi_cmnd *SCpnt) |
1da177e4 LT |
2274 | { |
2275 | int result = SCpnt->result; | |
af55ff67 | 2276 | unsigned int good_bytes = result ? 0 : scsi_bufflen(SCpnt); |
c46f0917 DLM |
2277 | unsigned int sector_size = SCpnt->device->sector_size; |
2278 | unsigned int resid; | |
1da177e4 | 2279 | struct scsi_sense_hdr sshdr; |
5999ccff | 2280 | struct request *req = scsi_cmd_to_rq(SCpnt); |
f3fa33ac | 2281 | struct scsi_disk *sdkp = scsi_disk(req->q->disk); |
1da177e4 LT |
2282 | int sense_valid = 0; |
2283 | int sense_deferred = 0; | |
1da177e4 | 2284 | |
89d94756 HR |
2285 | switch (req_op(req)) { |
2286 | case REQ_OP_DISCARD: | |
02d26103 | 2287 | case REQ_OP_WRITE_ZEROES: |
89d94756 | 2288 | case REQ_OP_ZONE_RESET: |
d81e9d49 | 2289 | case REQ_OP_ZONE_RESET_ALL: |
ad512f20 AJ |
2290 | case REQ_OP_ZONE_OPEN: |
2291 | case REQ_OP_ZONE_CLOSE: | |
2292 | case REQ_OP_ZONE_FINISH: | |
26e85fcd MP |
2293 | if (!result) { |
2294 | good_bytes = blk_rq_bytes(req); | |
2295 | scsi_set_resid(SCpnt, 0); | |
2296 | } else { | |
2297 | good_bytes = 0; | |
2298 | scsi_set_resid(SCpnt, blk_rq_bytes(req)); | |
89d94756 HR |
2299 | } |
2300 | break; | |
c46f0917 DLM |
2301 | default: |
2302 | /* | |
2303 | * In case of bogus fw or device, we could end up having | |
2304 | * an unaligned partial completion. Check this here and force | |
2305 | * alignment. | |
2306 | */ | |
2307 | resid = scsi_get_resid(SCpnt); | |
2308 | if (resid & (sector_size - 1)) { | |
2309 | sd_printk(KERN_INFO, sdkp, | |
2310 | "Unaligned partial completion (resid=%u, sector_sz=%u)\n", | |
2311 | resid, sector_size); | |
670d8be2 | 2312 | scsi_print_command(SCpnt); |
c46f0917 DLM |
2313 | resid = min(scsi_bufflen(SCpnt), |
2314 | round_up(resid, sector_size)); | |
2315 | scsi_set_resid(SCpnt, resid); | |
2316 | } | |
26e85fcd | 2317 | } |
6a32a8ae | 2318 | |
1da177e4 LT |
2319 | if (result) { |
2320 | sense_valid = scsi_command_normalize_sense(SCpnt, &sshdr); | |
2321 | if (sense_valid) | |
2322 | sense_deferred = scsi_sense_is_deferred(&sshdr); | |
2323 | } | |
2a863ba8 DJ |
2324 | sdkp->medium_access_timed_out = 0; |
2325 | ||
464a00c9 | 2326 | if (!scsi_status_is_check_condition(result) && |
03aba2f7 LT |
2327 | (!sense_valid || sense_deferred)) |
2328 | goto out; | |
2329 | ||
2330 | switch (sshdr.sense_key) { | |
2331 | case HARDWARE_ERROR: | |
2332 | case MEDIUM_ERROR: | |
af55ff67 | 2333 | good_bytes = sd_completed_bytes(SCpnt); |
03aba2f7 LT |
2334 | break; |
2335 | case RECOVERED_ERROR: | |
af55ff67 MP |
2336 | good_bytes = scsi_bufflen(SCpnt); |
2337 | break; | |
10dab226 JW |
2338 | case NO_SENSE: |
2339 | /* This indicates a false check condition, so ignore it. An | |
2340 | * unknown amount of data was transferred so treat it as an | |
2341 | * error. | |
2342 | */ | |
10dab226 JW |
2343 | SCpnt->result = 0; |
2344 | memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); | |
2345 | break; | |
c98a0eb0 MP |
2346 | case ABORTED_COMMAND: |
2347 | if (sshdr.asc == 0x10) /* DIF: Target detected corruption */ | |
2348 | good_bytes = sd_completed_bytes(SCpnt); | |
2349 | break; | |
2350 | case ILLEGAL_REQUEST: | |
d227ec26 CH |
2351 | switch (sshdr.asc) { |
2352 | case 0x10: /* DIX: Host detected corruption */ | |
af55ff67 | 2353 | good_bytes = sd_completed_bytes(SCpnt); |
d227ec26 CH |
2354 | break; |
2355 | case 0x20: /* INVALID COMMAND OPCODE */ | |
2356 | case 0x24: /* INVALID FIELD IN CDB */ | |
2357 | switch (SCpnt->cmnd[0]) { | |
5db44863 | 2358 | case UNMAP: |
b0dadb86 | 2359 | sd_disable_discard(sdkp); |
5db44863 MP |
2360 | break; |
2361 | case WRITE_SAME_16: | |
2362 | case WRITE_SAME: | |
d227ec26 | 2363 | if (SCpnt->cmnd[1] & 8) { /* UNMAP */ |
b0dadb86 | 2364 | sd_disable_discard(sdkp); |
d227ec26 | 2365 | } else { |
9972b8ce | 2366 | sd_disable_write_same(sdkp); |
e8064021 | 2367 | req->rq_flags |= RQF_QUIET; |
5db44863 | 2368 | } |
d227ec26 | 2369 | break; |
5db44863 MP |
2370 | } |
2371 | } | |
03aba2f7 LT |
2372 | break; |
2373 | default: | |
2374 | break; | |
1da177e4 | 2375 | } |
89d94756 | 2376 | |
03aba2f7 | 2377 | out: |
be60e770 | 2378 | if (sdkp->device->type == TYPE_ZBC) |
5795eb44 | 2379 | good_bytes = sd_zbc_complete(SCpnt, good_bytes, &sshdr); |
89d94756 | 2380 | |
ef61329d HR |
2381 | SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO, SCpnt, |
2382 | "sd_done: completed %d of %d bytes\n", | |
2383 | good_bytes, scsi_bufflen(SCpnt))); | |
2384 | ||
7b3d9545 | 2385 | return good_bytes; |
1da177e4 LT |
2386 | } |
2387 | ||
1da177e4 LT |
2388 | /* |
2389 | * spinup disk - called only in sd_revalidate_disk() | |
2390 | */ | |
2391 | static void | |
e73aec82 | 2392 | sd_spinup_disk(struct scsi_disk *sdkp) |
ea73a9f2 | 2393 | { |
c1acf38c | 2394 | static const u8 cmd[10] = { TEST_UNIT_READY }; |
4451e472 | 2395 | unsigned long spintime_expire = 0; |
c1acf38c | 2396 | int spintime, sense_valid = 0; |
1da177e4 LT |
2397 | unsigned int the_result; |
2398 | struct scsi_sense_hdr sshdr; | |
c1acf38c MC |
2399 | struct scsi_failure failure_defs[] = { |
2400 | /* Do not retry Medium Not Present */ | |
2401 | { | |
2402 | .sense = UNIT_ATTENTION, | |
2403 | .asc = 0x3A, | |
2404 | .ascq = SCMD_FAILURE_ASCQ_ANY, | |
2405 | .result = SAM_STAT_CHECK_CONDITION, | |
2406 | }, | |
2407 | { | |
2408 | .sense = NOT_READY, | |
2409 | .asc = 0x3A, | |
2410 | .ascq = SCMD_FAILURE_ASCQ_ANY, | |
2411 | .result = SAM_STAT_CHECK_CONDITION, | |
2412 | }, | |
2413 | /* Retry when scsi_status_is_good would return false 3 times */ | |
2414 | { | |
2415 | .result = SCMD_FAILURE_STAT_ANY, | |
2416 | .allowed = 3, | |
2417 | }, | |
2418 | {} | |
2419 | }; | |
2420 | struct scsi_failures failures = { | |
2421 | .failure_definitions = failure_defs, | |
2422 | }; | |
af16cd63 MC |
2423 | const struct scsi_exec_args exec_args = { |
2424 | .sshdr = &sshdr, | |
c1acf38c | 2425 | .failures = &failures, |
af16cd63 | 2426 | }; |
1da177e4 LT |
2427 | |
2428 | spintime = 0; | |
2429 | ||
2430 | /* Spin up drives, as required. Only do this at boot time */ | |
2431 | /* Spinup needs to be done for module loads too. */ | |
2432 | do { | |
c1acf38c | 2433 | bool media_was_present = sdkp->media_present; |
4521428c | 2434 | |
c1acf38c | 2435 | scsi_failures_reset_retries(&failures); |
1da177e4 | 2436 | |
c1acf38c MC |
2437 | the_result = scsi_execute_cmd(sdkp->device, cmd, REQ_OP_DRV_IN, |
2438 | NULL, 0, SD_TIMEOUT, | |
2439 | sdkp->max_retries, &exec_args); | |
1da177e4 | 2440 | |
b4d38e38 | 2441 | |
c1acf38c MC |
2442 | if (the_result > 0) { |
2443 | /* | |
2444 | * If the drive has indicated to us that it doesn't | |
2445 | * have any media in it, don't bother with any more | |
2446 | * polling. | |
2447 | */ | |
2448 | if (media_not_present(sdkp, &sshdr)) { | |
2449 | if (media_was_present) | |
2450 | sd_printk(KERN_NOTICE, sdkp, | |
2451 | "Media removed, stopped polling\n"); | |
2452 | return; | |
b4d0c33a | 2453 | } |
c1acf38c MC |
2454 | sense_valid = scsi_sense_valid(&sshdr); |
2455 | } | |
1da177e4 | 2456 | |
464a00c9 | 2457 | if (!scsi_status_is_check_condition(the_result)) { |
1da177e4 LT |
2458 | /* no sense, TUR either succeeded or failed |
2459 | * with a status error */ | |
e73aec82 | 2460 | if(!spintime && !scsi_status_is_good(the_result)) { |
ef61329d HR |
2461 | sd_print_result(sdkp, "Test Unit Ready failed", |
2462 | the_result); | |
e73aec82 | 2463 | } |
1da177e4 LT |
2464 | break; |
2465 | } | |
ef61329d | 2466 | |
1da177e4 LT |
2467 | /* |
2468 | * The device does not want the automatic start to be issued. | |
2469 | */ | |
33dd6f92 | 2470 | if (sdkp->device->no_start_on_add) |
1da177e4 | 2471 | break; |
1da177e4 | 2472 | |
33dd6f92 MW |
2473 | if (sense_valid && sshdr.sense_key == NOT_READY) { |
2474 | if (sshdr.asc == 4 && sshdr.ascq == 3) | |
2475 | break; /* manual intervention required */ | |
2476 | if (sshdr.asc == 4 && sshdr.ascq == 0xb) | |
2477 | break; /* standby */ | |
2478 | if (sshdr.asc == 4 && sshdr.ascq == 0xc) | |
2479 | break; /* unavailable */ | |
505aa4b6 MR |
2480 | if (sshdr.asc == 4 && sshdr.ascq == 0x1b) |
2481 | break; /* sanitize in progress */ | |
2bbeb8d1 DG |
2482 | if (sshdr.asc == 4 && sshdr.ascq == 0x24) |
2483 | break; /* depopulation in progress */ | |
2484 | if (sshdr.asc == 4 && sshdr.ascq == 0x25) | |
2485 | break; /* depopulation restoration in progress */ | |
33dd6f92 MW |
2486 | /* |
2487 | * Issue command to spin up drive when not ready | |
2488 | */ | |
1da177e4 | 2489 | if (!spintime) { |
1008f577 MC |
2490 | /* Return immediately and start spin cycle */ |
2491 | const u8 start_cmd[10] = { | |
2492 | [0] = START_STOP, | |
2493 | [1] = 1, | |
2494 | [4] = sdkp->device->start_stop_pwr_cond ? | |
2495 | 0x11 : 1, | |
2496 | }; | |
2497 | ||
e73aec82 | 2498 | sd_printk(KERN_NOTICE, sdkp, "Spinning up disk..."); |
1008f577 | 2499 | scsi_execute_cmd(sdkp->device, start_cmd, |
af16cd63 | 2500 | REQ_OP_DRV_IN, NULL, 0, |
0610959f | 2501 | SD_TIMEOUT, sdkp->max_retries, |
af16cd63 | 2502 | &exec_args); |
4451e472 AS |
2503 | spintime_expire = jiffies + 100 * HZ; |
2504 | spintime = 1; | |
1da177e4 | 2505 | } |
1da177e4 LT |
2506 | /* Wait 1 second for next try */ |
2507 | msleep(1000); | |
3a1d0783 | 2508 | printk(KERN_CONT "."); |
4451e472 AS |
2509 | |
2510 | /* | |
2511 | * Wait for USB flash devices with slow firmware. | |
2512 | * Yes, this sense key/ASC combination shouldn't | |
2513 | * occur here. It's characteristic of these devices. | |
2514 | */ | |
2515 | } else if (sense_valid && | |
2516 | sshdr.sense_key == UNIT_ATTENTION && | |
2517 | sshdr.asc == 0x28) { | |
2518 | if (!spintime) { | |
2519 | spintime_expire = jiffies + 5 * HZ; | |
2520 | spintime = 1; | |
2521 | } | |
2522 | /* Wait 1 second for next try */ | |
2523 | msleep(1000); | |
1da177e4 LT |
2524 | } else { |
2525 | /* we don't understand the sense code, so it's | |
2526 | * probably pointless to loop */ | |
2527 | if(!spintime) { | |
e73aec82 MP |
2528 | sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n"); |
2529 | sd_print_sense_hdr(sdkp, &sshdr); | |
1da177e4 LT |
2530 | } |
2531 | break; | |
2532 | } | |
2533 | ||
4451e472 | 2534 | } while (spintime && time_before_eq(jiffies, spintime_expire)); |
1da177e4 LT |
2535 | |
2536 | if (spintime) { | |
2537 | if (scsi_status_is_good(the_result)) | |
3a1d0783 | 2538 | printk(KERN_CONT "ready\n"); |
1da177e4 | 2539 | else |
3a1d0783 | 2540 | printk(KERN_CONT "not responding...\n"); |
1da177e4 LT |
2541 | } |
2542 | } | |
2543 | ||
e0597d70 MP |
2544 | /* |
2545 | * Determine whether disk supports Data Integrity Field. | |
2546 | */ | |
fe542396 | 2547 | static int sd_read_protection_type(struct scsi_disk *sdkp, unsigned char *buffer) |
e0597d70 MP |
2548 | { |
2549 | struct scsi_device *sdp = sdkp->device; | |
2550 | u8 type; | |
2551 | ||
465f4eda XC |
2552 | if (scsi_device_protection(sdp) == 0 || (buffer[12] & 1) == 0) { |
2553 | sdkp->protection_type = 0; | |
1e029397 | 2554 | return 0; |
465f4eda | 2555 | } |
35e1a5d9 MP |
2556 | |
2557 | type = ((buffer[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */ | |
2558 | ||
1e029397 MP |
2559 | if (type > T10_PI_TYPE3_PROTECTION) { |
2560 | sd_printk(KERN_ERR, sdkp, "formatted with unsupported" \ | |
2561 | " protection type %u. Disabling disk!\n", | |
2562 | type); | |
2563 | sdkp->protection_type = 0; | |
2564 | return -ENODEV; | |
2565 | } | |
e0597d70 | 2566 | |
be922f47 MP |
2567 | sdkp->protection_type = type; |
2568 | ||
1e029397 MP |
2569 | return 0; |
2570 | } | |
2571 | ||
c6e56cf6 CH |
2572 | static void sd_config_protection(struct scsi_disk *sdkp, |
2573 | struct queue_limits *lim) | |
1e029397 MP |
2574 | { |
2575 | struct scsi_device *sdp = sdkp->device; | |
2576 | ||
c6e56cf6 CH |
2577 | if (IS_ENABLED(CONFIG_BLK_DEV_INTEGRITY)) |
2578 | sd_dif_config_host(sdkp, lim); | |
1e029397 MP |
2579 | |
2580 | if (!sdkp->protection_type) | |
2581 | return; | |
2582 | ||
2583 | if (!scsi_host_dif_capable(sdp->host, sdkp->protection_type)) { | |
26a02d97 XY |
2584 | sd_first_printk(KERN_NOTICE, sdkp, |
2585 | "Disabling DIF Type %u protection\n", | |
2586 | sdkp->protection_type); | |
1e029397 MP |
2587 | sdkp->protection_type = 0; |
2588 | } | |
2589 | ||
26a02d97 XY |
2590 | sd_first_printk(KERN_NOTICE, sdkp, "Enabling DIF Type %u protection\n", |
2591 | sdkp->protection_type); | |
e0597d70 MP |
2592 | } |
2593 | ||
0da205e0 MW |
2594 | static void read_capacity_error(struct scsi_disk *sdkp, struct scsi_device *sdp, |
2595 | struct scsi_sense_hdr *sshdr, int sense_valid, | |
2596 | int the_result) | |
2597 | { | |
464a00c9 | 2598 | if (sense_valid) |
0da205e0 MW |
2599 | sd_print_sense_hdr(sdkp, sshdr); |
2600 | else | |
2601 | sd_printk(KERN_NOTICE, sdkp, "Sense not available.\n"); | |
2602 | ||
2603 | /* | |
2604 | * Set dirty bit for removable devices if not ready - | |
2605 | * sometimes drives will not report this properly. | |
2606 | */ | |
2607 | if (sdp->removable && | |
2608 | sense_valid && sshdr->sense_key == NOT_READY) | |
2bae0093 | 2609 | set_media_not_present(sdkp); |
0da205e0 MW |
2610 | |
2611 | /* | |
2612 | * We used to set media_present to 0 here to indicate no media | |
2613 | * in the drive, but some drives fail read capacity even with | |
2614 | * media present, so we can't do that. | |
2615 | */ | |
2616 | sdkp->capacity = 0; /* unknown mapped to zero - as usual */ | |
2617 | } | |
2618 | ||
2619 | #define RC16_LEN 32 | |
2620 | #if RC16_LEN > SD_BUF_SIZE | |
2621 | #error RC16_LEN must not be more than SD_BUF_SIZE | |
2622 | #endif | |
2623 | ||
3233ac19 JB |
2624 | #define READ_CAPACITY_RETRIES_ON_RESET 10 |
2625 | ||
0da205e0 | 2626 | static int read_capacity_16(struct scsi_disk *sdkp, struct scsi_device *sdp, |
804e498e | 2627 | struct queue_limits *lim, unsigned char *buffer) |
ea73a9f2 | 2628 | { |
1da177e4 | 2629 | unsigned char cmd[16]; |
1da177e4 | 2630 | struct scsi_sense_hdr sshdr; |
af16cd63 MC |
2631 | const struct scsi_exec_args exec_args = { |
2632 | .sshdr = &sshdr, | |
2633 | }; | |
1da177e4 | 2634 | int sense_valid = 0; |
0da205e0 | 2635 | int the_result; |
3233ac19 | 2636 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
ea09bcc9 | 2637 | unsigned int alignment; |
0da205e0 MW |
2638 | unsigned long long lba; |
2639 | unsigned sector_size; | |
1da177e4 | 2640 | |
5ce524bd HG |
2641 | if (sdp->no_read_capacity_16) |
2642 | return -EINVAL; | |
2643 | ||
1da177e4 | 2644 | do { |
0da205e0 | 2645 | memset(cmd, 0, 16); |
eb846d9f | 2646 | cmd[0] = SERVICE_ACTION_IN_16; |
0da205e0 MW |
2647 | cmd[1] = SAI_READ_CAPACITY_16; |
2648 | cmd[13] = RC16_LEN; | |
2649 | memset(buffer, 0, RC16_LEN); | |
2650 | ||
af16cd63 MC |
2651 | the_result = scsi_execute_cmd(sdp, cmd, REQ_OP_DRV_IN, |
2652 | buffer, RC16_LEN, SD_TIMEOUT, | |
2653 | sdkp->max_retries, &exec_args); | |
ced202f7 | 2654 | if (the_result > 0) { |
bd593bd2 MC |
2655 | if (media_not_present(sdkp, &sshdr)) |
2656 | return -ENODEV; | |
2657 | ||
ea73a9f2 | 2658 | sense_valid = scsi_sense_valid(&sshdr); |
2b301307 MW |
2659 | if (sense_valid && |
2660 | sshdr.sense_key == ILLEGAL_REQUEST && | |
2661 | (sshdr.asc == 0x20 || sshdr.asc == 0x24) && | |
2662 | sshdr.ascq == 0x00) | |
2663 | /* Invalid Command Operation Code or | |
2664 | * Invalid Field in CDB, just retry | |
2665 | * silently with RC10 */ | |
2666 | return -EINVAL; | |
3233ac19 JB |
2667 | if (sense_valid && |
2668 | sshdr.sense_key == UNIT_ATTENTION && | |
2669 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) | |
2670 | /* Device reset might occur several times, | |
2671 | * give it one more chance */ | |
2672 | if (--reset_retries > 0) | |
2673 | continue; | |
2b301307 | 2674 | } |
1da177e4 LT |
2675 | retries--; |
2676 | ||
2677 | } while (the_result && retries); | |
2678 | ||
0da205e0 | 2679 | if (the_result) { |
ef61329d | 2680 | sd_print_result(sdkp, "Read Capacity(16) failed", the_result); |
0da205e0 MW |
2681 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); |
2682 | return -EINVAL; | |
2683 | } | |
e73aec82 | 2684 | |
8f76d151 DH |
2685 | sector_size = get_unaligned_be32(&buffer[8]); |
2686 | lba = get_unaligned_be64(&buffer[0]); | |
0da205e0 | 2687 | |
fe542396 MP |
2688 | if (sd_read_protection_type(sdkp, buffer) < 0) { |
2689 | sdkp->capacity = 0; | |
2690 | return -ENODEV; | |
2691 | } | |
0da205e0 | 2692 | |
ea09bcc9 | 2693 | /* Logical blocks per physical block exponent */ |
526f7c79 | 2694 | sdkp->physical_block_size = (1 << (buffer[13] & 0xf)) * sector_size; |
ea09bcc9 | 2695 | |
89d94756 HR |
2696 | /* RC basis */ |
2697 | sdkp->rc_basis = (buffer[12] >> 4) & 0x3; | |
2698 | ||
ea09bcc9 MP |
2699 | /* Lowest aligned logical block */ |
2700 | alignment = ((buffer[14] & 0x3f) << 8 | buffer[15]) * sector_size; | |
804e498e | 2701 | lim->alignment_offset = alignment; |
ea09bcc9 MP |
2702 | if (alignment && sdkp->first_scan) |
2703 | sd_printk(KERN_NOTICE, sdkp, | |
2704 | "physical block alignment offset: %u\n", alignment); | |
2705 | ||
c98a0eb0 MP |
2706 | if (buffer[14] & 0x80) { /* LBPME */ |
2707 | sdkp->lbpme = 1; | |
e339c1a7 | 2708 | |
c98a0eb0 MP |
2709 | if (buffer[14] & 0x40) /* LBPRZ */ |
2710 | sdkp->lbprz = 1; | |
e339c1a7 MP |
2711 | } |
2712 | ||
0da205e0 MW |
2713 | sdkp->capacity = lba + 1; |
2714 | return sector_size; | |
2715 | } | |
2716 | ||
2717 | static int read_capacity_10(struct scsi_disk *sdkp, struct scsi_device *sdp, | |
2718 | unsigned char *buffer) | |
2719 | { | |
0f11328f | 2720 | static const u8 cmd[10] = { READ_CAPACITY }; |
0da205e0 | 2721 | struct scsi_sense_hdr sshdr; |
0f11328f MC |
2722 | struct scsi_failure failure_defs[] = { |
2723 | /* Do not retry Medium Not Present */ | |
2724 | { | |
2725 | .sense = UNIT_ATTENTION, | |
2726 | .asc = 0x3A, | |
2727 | .result = SAM_STAT_CHECK_CONDITION, | |
2728 | }, | |
2729 | { | |
2730 | .sense = NOT_READY, | |
2731 | .asc = 0x3A, | |
2732 | .result = SAM_STAT_CHECK_CONDITION, | |
2733 | }, | |
2734 | /* Device reset might occur several times so retry a lot */ | |
2735 | { | |
2736 | .sense = UNIT_ATTENTION, | |
2737 | .asc = 0x29, | |
2738 | .allowed = READ_CAPACITY_RETRIES_ON_RESET, | |
2739 | .result = SAM_STAT_CHECK_CONDITION, | |
2740 | }, | |
2741 | /* Any other error not listed above retry 3 times */ | |
2742 | { | |
2743 | .result = SCMD_FAILURE_RESULT_ANY, | |
2744 | .allowed = 3, | |
2745 | }, | |
2746 | {} | |
2747 | }; | |
2748 | struct scsi_failures failures = { | |
2749 | .failure_definitions = failure_defs, | |
2750 | }; | |
af16cd63 MC |
2751 | const struct scsi_exec_args exec_args = { |
2752 | .sshdr = &sshdr, | |
0f11328f | 2753 | .failures = &failures, |
af16cd63 | 2754 | }; |
0da205e0 MW |
2755 | int sense_valid = 0; |
2756 | int the_result; | |
0da205e0 MW |
2757 | sector_t lba; |
2758 | unsigned sector_size; | |
2759 | ||
0f11328f | 2760 | memset(buffer, 0, 8); |
0da205e0 | 2761 | |
0f11328f MC |
2762 | the_result = scsi_execute_cmd(sdp, cmd, REQ_OP_DRV_IN, buffer, |
2763 | 8, SD_TIMEOUT, sdkp->max_retries, | |
2764 | &exec_args); | |
0da205e0 | 2765 | |
0f11328f MC |
2766 | if (the_result > 0) { |
2767 | sense_valid = scsi_sense_valid(&sshdr); | |
0da205e0 MW |
2768 | |
2769 | if (media_not_present(sdkp, &sshdr)) | |
2770 | return -ENODEV; | |
0f11328f | 2771 | } |
0da205e0 MW |
2772 | |
2773 | if (the_result) { | |
ef61329d | 2774 | sd_print_result(sdkp, "Read Capacity(10) failed", the_result); |
0da205e0 MW |
2775 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); |
2776 | return -EINVAL; | |
2777 | } | |
2778 | ||
8f76d151 DH |
2779 | sector_size = get_unaligned_be32(&buffer[4]); |
2780 | lba = get_unaligned_be32(&buffer[0]); | |
0da205e0 | 2781 | |
5ce524bd HG |
2782 | if (sdp->no_read_capacity_16 && (lba == 0xffffffff)) { |
2783 | /* Some buggy (usb cardreader) devices return an lba of | |
2784 | 0xffffffff when the want to report a size of 0 (with | |
2785 | which they really mean no media is present) */ | |
2786 | sdkp->capacity = 0; | |
5cc10350 | 2787 | sdkp->physical_block_size = sector_size; |
5ce524bd HG |
2788 | return sector_size; |
2789 | } | |
2790 | ||
0da205e0 | 2791 | sdkp->capacity = lba + 1; |
526f7c79 | 2792 | sdkp->physical_block_size = sector_size; |
0da205e0 MW |
2793 | return sector_size; |
2794 | } | |
2795 | ||
2b301307 MW |
2796 | static int sd_try_rc16_first(struct scsi_device *sdp) |
2797 | { | |
f87146bb HR |
2798 | if (sdp->host->max_cmd_len < 16) |
2799 | return 0; | |
6a0bdffa AS |
2800 | if (sdp->try_rc_10_first) |
2801 | return 0; | |
2b301307 MW |
2802 | if (sdp->scsi_level > SCSI_SPC_2) |
2803 | return 1; | |
2804 | if (scsi_device_protection(sdp)) | |
2805 | return 1; | |
2806 | return 0; | |
2807 | } | |
2808 | ||
0da205e0 MW |
2809 | /* |
2810 | * read disk capacity | |
2811 | */ | |
2812 | static void | |
804e498e CH |
2813 | sd_read_capacity(struct scsi_disk *sdkp, struct queue_limits *lim, |
2814 | unsigned char *buffer) | |
0da205e0 MW |
2815 | { |
2816 | int sector_size; | |
2817 | struct scsi_device *sdp = sdkp->device; | |
2818 | ||
2b301307 | 2819 | if (sd_try_rc16_first(sdp)) { |
804e498e | 2820 | sector_size = read_capacity_16(sdkp, sdp, lim, buffer); |
0da205e0 | 2821 | if (sector_size == -EOVERFLOW) |
1da177e4 | 2822 | goto got_data; |
2b301307 MW |
2823 | if (sector_size == -ENODEV) |
2824 | return; | |
2825 | if (sector_size < 0) | |
2826 | sector_size = read_capacity_10(sdkp, sdp, buffer); | |
0da205e0 MW |
2827 | if (sector_size < 0) |
2828 | return; | |
1da177e4 | 2829 | } else { |
0da205e0 MW |
2830 | sector_size = read_capacity_10(sdkp, sdp, buffer); |
2831 | if (sector_size == -EOVERFLOW) | |
2832 | goto got_data; | |
2833 | if (sector_size < 0) | |
2834 | return; | |
2835 | if ((sizeof(sdkp->capacity) > 4) && | |
2836 | (sdkp->capacity > 0xffffffffULL)) { | |
2837 | int old_sector_size = sector_size; | |
2838 | sd_printk(KERN_NOTICE, sdkp, "Very big device. " | |
2839 | "Trying to use READ CAPACITY(16).\n"); | |
804e498e | 2840 | sector_size = read_capacity_16(sdkp, sdp, lim, buffer); |
0da205e0 MW |
2841 | if (sector_size < 0) { |
2842 | sd_printk(KERN_NOTICE, sdkp, | |
2843 | "Using 0xffffffff as device size\n"); | |
2844 | sdkp->capacity = 1 + (sector_t) 0xffffffff; | |
2845 | sector_size = old_sector_size; | |
2846 | goto got_data; | |
2847 | } | |
597d7400 MP |
2848 | /* Remember that READ CAPACITY(16) succeeded */ |
2849 | sdp->try_rc_10_first = 0; | |
0da205e0 MW |
2850 | } |
2851 | } | |
1da177e4 | 2852 | |
5c211caa AS |
2853 | /* Some devices are known to return the total number of blocks, |
2854 | * not the highest block number. Some devices have versions | |
2855 | * which do this and others which do not. Some devices we might | |
2856 | * suspect of doing this but we don't know for certain. | |
2857 | * | |
2858 | * If we know the reported capacity is wrong, decrement it. If | |
2859 | * we can only guess, then assume the number of blocks is even | |
2860 | * (usually true but not always) and err on the side of lowering | |
2861 | * the capacity. | |
2862 | */ | |
2863 | if (sdp->fix_capacity || | |
2864 | (sdp->guess_capacity && (sdkp->capacity & 0x01))) { | |
2865 | sd_printk(KERN_INFO, sdkp, "Adjusting the sector count " | |
2866 | "from its reported value: %llu\n", | |
2867 | (unsigned long long) sdkp->capacity); | |
1da177e4 | 2868 | --sdkp->capacity; |
61bf54b7 ON |
2869 | } |
2870 | ||
1da177e4 LT |
2871 | got_data: |
2872 | if (sector_size == 0) { | |
2873 | sector_size = 512; | |
e73aec82 MP |
2874 | sd_printk(KERN_NOTICE, sdkp, "Sector size 0 reported, " |
2875 | "assuming 512.\n"); | |
1da177e4 LT |
2876 | } |
2877 | ||
2878 | if (sector_size != 512 && | |
2879 | sector_size != 1024 && | |
2880 | sector_size != 2048 && | |
74856fbf | 2881 | sector_size != 4096) { |
e73aec82 MP |
2882 | sd_printk(KERN_NOTICE, sdkp, "Unsupported sector size %d.\n", |
2883 | sector_size); | |
1da177e4 LT |
2884 | /* |
2885 | * The user might want to re-format the drive with | |
2886 | * a supported sectorsize. Once this happens, it | |
2887 | * would be relatively trivial to set the thing up. | |
2888 | * For this reason, we leave the thing in the table. | |
2889 | */ | |
2890 | sdkp->capacity = 0; | |
2891 | /* | |
2892 | * set a bogus sector size so the normal read/write | |
2893 | * logic in the block layer will eventually refuse any | |
2894 | * request on this device without tripping over power | |
2895 | * of two sector size assumptions | |
2896 | */ | |
2897 | sector_size = 512; | |
2898 | } | |
804e498e CH |
2899 | lim->logical_block_size = sector_size; |
2900 | lim->physical_block_size = sdkp->physical_block_size; | |
89d94756 | 2901 | sdkp->device->sector_size = sector_size; |
7404ad3b | 2902 | |
89d94756 HR |
2903 | if (sdkp->capacity > 0xffffffff) |
2904 | sdp->use_16_for_rw = 1; | |
1da177e4 | 2905 | |
89d94756 | 2906 | } |
1da177e4 | 2907 | |
89d94756 HR |
2908 | /* |
2909 | * Print disk capacity | |
2910 | */ | |
2911 | static void | |
2912 | sd_print_capacity(struct scsi_disk *sdkp, | |
2913 | sector_t old_capacity) | |
2914 | { | |
2915 | int sector_size = sdkp->device->sector_size; | |
2916 | char cap_str_2[10], cap_str_10[10]; | |
ea09bcc9 | 2917 | |
d7e6db20 DLM |
2918 | if (!sdkp->first_scan && old_capacity == sdkp->capacity) |
2919 | return; | |
2920 | ||
89d94756 HR |
2921 | string_get_size(sdkp->capacity, sector_size, |
2922 | STRING_UNITS_2, cap_str_2, sizeof(cap_str_2)); | |
2923 | string_get_size(sdkp->capacity, sector_size, | |
d7e6db20 | 2924 | STRING_UNITS_10, cap_str_10, sizeof(cap_str_10)); |
1da177e4 | 2925 | |
d7e6db20 DLM |
2926 | sd_printk(KERN_NOTICE, sdkp, |
2927 | "%llu %d-byte logical blocks: (%s/%s)\n", | |
2928 | (unsigned long long)sdkp->capacity, | |
2929 | sector_size, cap_str_10, cap_str_2); | |
53ad570b | 2930 | |
d7e6db20 DLM |
2931 | if (sdkp->physical_block_size != sector_size) |
2932 | sd_printk(KERN_NOTICE, sdkp, | |
2933 | "%u-byte physical blocks\n", | |
2934 | sdkp->physical_block_size); | |
1da177e4 LT |
2935 | } |
2936 | ||
2937 | /* called with buffer of length 512 */ | |
2938 | static inline int | |
0610959f | 2939 | sd_do_mode_sense(struct scsi_disk *sdkp, int dbd, int modepage, |
ea73a9f2 JB |
2940 | unsigned char *buffer, int len, struct scsi_mode_data *data, |
2941 | struct scsi_sense_hdr *sshdr) | |
1da177e4 | 2942 | { |
c749301e DLM |
2943 | /* |
2944 | * If we must use MODE SENSE(10), make sure that the buffer length | |
2945 | * is at least 8 bytes so that the mode sense header fits. | |
2946 | */ | |
2947 | if (sdkp->device->use_10_for_ms && len < 8) | |
2948 | len = 8; | |
2949 | ||
a6cdc35f DLM |
2950 | return scsi_mode_sense(sdkp->device, dbd, modepage, 0, buffer, len, |
2951 | SD_TIMEOUT, sdkp->max_retries, data, sshdr); | |
1da177e4 LT |
2952 | } |
2953 | ||
2954 | /* | |
2955 | * read write protect setting, if possible - called only in sd_revalidate_disk() | |
48970800 | 2956 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
2957 | */ |
2958 | static void | |
e73aec82 | 2959 | sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer) |
ea73a9f2 | 2960 | { |
1da177e4 | 2961 | int res; |
ea73a9f2 | 2962 | struct scsi_device *sdp = sdkp->device; |
1da177e4 | 2963 | struct scsi_mode_data data; |
70a9b873 | 2964 | int old_wp = sdkp->write_prot; |
1da177e4 LT |
2965 | |
2966 | set_disk_ro(sdkp->disk, 0); | |
ea73a9f2 | 2967 | if (sdp->skip_ms_page_3f) { |
b2bff6ce | 2968 | sd_first_printk(KERN_NOTICE, sdkp, "Assuming Write Enabled\n"); |
1da177e4 LT |
2969 | return; |
2970 | } | |
2971 | ||
ea73a9f2 | 2972 | if (sdp->use_192_bytes_for_3f) { |
0610959f | 2973 | res = sd_do_mode_sense(sdkp, 0, 0x3F, buffer, 192, &data, NULL); |
1da177e4 LT |
2974 | } else { |
2975 | /* | |
2976 | * First attempt: ask for all pages (0x3F), but only 4 bytes. | |
2977 | * We have to start carefully: some devices hang if we ask | |
2978 | * for more than is available. | |
2979 | */ | |
0610959f | 2980 | res = sd_do_mode_sense(sdkp, 0, 0x3F, buffer, 4, &data, NULL); |
1da177e4 LT |
2981 | |
2982 | /* | |
2983 | * Second attempt: ask for page 0 When only page 0 is | |
2984 | * implemented, a request for page 3F may return Sense Key | |
2985 | * 5: Illegal Request, Sense Code 24: Invalid field in | |
2986 | * CDB. | |
2987 | */ | |
8793613d | 2988 | if (res < 0) |
0610959f | 2989 | res = sd_do_mode_sense(sdkp, 0, 0, buffer, 4, &data, NULL); |
1da177e4 LT |
2990 | |
2991 | /* | |
2992 | * Third attempt: ask 255 bytes, as we did earlier. | |
2993 | */ | |
8793613d | 2994 | if (res < 0) |
0610959f | 2995 | res = sd_do_mode_sense(sdkp, 0, 0x3F, buffer, 255, |
ea73a9f2 | 2996 | &data, NULL); |
1da177e4 LT |
2997 | } |
2998 | ||
8793613d | 2999 | if (res < 0) { |
b2bff6ce | 3000 | sd_first_printk(KERN_WARNING, sdkp, |
e73aec82 | 3001 | "Test WP failed, assume Write Enabled\n"); |
1da177e4 LT |
3002 | } else { |
3003 | sdkp->write_prot = ((data.device_specific & 0x80) != 0); | |
8acf608e | 3004 | set_disk_ro(sdkp->disk, sdkp->write_prot); |
70a9b873 MP |
3005 | if (sdkp->first_scan || old_wp != sdkp->write_prot) { |
3006 | sd_printk(KERN_NOTICE, sdkp, "Write Protect is %s\n", | |
3007 | sdkp->write_prot ? "on" : "off"); | |
df441cc0 | 3008 | sd_printk(KERN_DEBUG, sdkp, "Mode Sense: %4ph\n", buffer); |
70a9b873 | 3009 | } |
1da177e4 LT |
3010 | } |
3011 | } | |
3012 | ||
3013 | /* | |
3014 | * sd_read_cache_type - called only from sd_revalidate_disk() | |
48970800 | 3015 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
3016 | */ |
3017 | static void | |
e73aec82 | 3018 | sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer) |
631e8a13 | 3019 | { |
1da177e4 | 3020 | int len = 0, res; |
ea73a9f2 | 3021 | struct scsi_device *sdp = sdkp->device; |
1da177e4 | 3022 | |
631e8a13 AV |
3023 | int dbd; |
3024 | int modepage; | |
0bcaa111 | 3025 | int first_len; |
1da177e4 LT |
3026 | struct scsi_mode_data data; |
3027 | struct scsi_sense_hdr sshdr; | |
70a9b873 MP |
3028 | int old_wce = sdkp->WCE; |
3029 | int old_rcd = sdkp->RCD; | |
3030 | int old_dpofua = sdkp->DPOFUA; | |
1da177e4 | 3031 | |
39c60a09 JB |
3032 | |
3033 | if (sdkp->cache_override) | |
3034 | return; | |
3035 | ||
0bcaa111 LT |
3036 | first_len = 4; |
3037 | if (sdp->skip_ms_page_8) { | |
3038 | if (sdp->type == TYPE_RBC) | |
3039 | goto defaults; | |
3040 | else { | |
3041 | if (sdp->skip_ms_page_3f) | |
3042 | goto defaults; | |
3043 | modepage = 0x3F; | |
3044 | if (sdp->use_192_bytes_for_3f) | |
3045 | first_len = 192; | |
3046 | dbd = 0; | |
3047 | } | |
3048 | } else if (sdp->type == TYPE_RBC) { | |
631e8a13 AV |
3049 | modepage = 6; |
3050 | dbd = 8; | |
3051 | } else { | |
3052 | modepage = 8; | |
3053 | dbd = 0; | |
3054 | } | |
3055 | ||
1da177e4 | 3056 | /* cautiously ask */ |
0610959f | 3057 | res = sd_do_mode_sense(sdkp, dbd, modepage, buffer, first_len, |
0bcaa111 | 3058 | &data, &sshdr); |
1da177e4 | 3059 | |
8793613d | 3060 | if (res < 0) |
1da177e4 LT |
3061 | goto bad_sense; |
3062 | ||
6d73c851 AV |
3063 | if (!data.header_length) { |
3064 | modepage = 6; | |
0bcaa111 | 3065 | first_len = 0; |
b2bff6ce MP |
3066 | sd_first_printk(KERN_ERR, sdkp, |
3067 | "Missing header in MODE_SENSE response\n"); | |
6d73c851 AV |
3068 | } |
3069 | ||
1da177e4 LT |
3070 | /* that went OK, now ask for the proper length */ |
3071 | len = data.length; | |
3072 | ||
3073 | /* | |
3074 | * We're only interested in the first three bytes, actually. | |
3075 | * But the data cache page is defined for the first 20. | |
3076 | */ | |
3077 | if (len < 3) | |
3078 | goto bad_sense; | |
0bcaa111 | 3079 | else if (len > SD_BUF_SIZE) { |
b2bff6ce | 3080 | sd_first_printk(KERN_NOTICE, sdkp, "Truncating mode parameter " |
0bcaa111 LT |
3081 | "data from %d to %d bytes\n", len, SD_BUF_SIZE); |
3082 | len = SD_BUF_SIZE; | |
3083 | } | |
3084 | if (modepage == 0x3F && sdp->use_192_bytes_for_3f) | |
3085 | len = 192; | |
1da177e4 LT |
3086 | |
3087 | /* Get the data */ | |
0bcaa111 | 3088 | if (len > first_len) |
0610959f | 3089 | res = sd_do_mode_sense(sdkp, dbd, modepage, buffer, len, |
0bcaa111 | 3090 | &data, &sshdr); |
1da177e4 | 3091 | |
8793613d | 3092 | if (!res) { |
631e8a13 | 3093 | int offset = data.header_length + data.block_descriptor_length; |
1da177e4 | 3094 | |
0bcaa111 LT |
3095 | while (offset < len) { |
3096 | u8 page_code = buffer[offset] & 0x3F; | |
3097 | u8 spf = buffer[offset] & 0x40; | |
3098 | ||
3099 | if (page_code == 8 || page_code == 6) { | |
3100 | /* We're interested only in the first 3 bytes. | |
3101 | */ | |
3102 | if (len - offset <= 2) { | |
b2bff6ce MP |
3103 | sd_first_printk(KERN_ERR, sdkp, |
3104 | "Incomplete mode parameter " | |
3105 | "data\n"); | |
0bcaa111 LT |
3106 | goto defaults; |
3107 | } else { | |
3108 | modepage = page_code; | |
3109 | goto Page_found; | |
3110 | } | |
3111 | } else { | |
3112 | /* Go to the next page */ | |
3113 | if (spf && len - offset > 3) | |
3114 | offset += 4 + (buffer[offset+2] << 8) + | |
3115 | buffer[offset+3]; | |
3116 | else if (!spf && len - offset > 1) | |
3117 | offset += 2 + buffer[offset+1]; | |
3118 | else { | |
b2bff6ce MP |
3119 | sd_first_printk(KERN_ERR, sdkp, |
3120 | "Incomplete mode " | |
3121 | "parameter data\n"); | |
0bcaa111 LT |
3122 | goto defaults; |
3123 | } | |
3124 | } | |
48970800 AV |
3125 | } |
3126 | ||
c4da1205 MK |
3127 | sd_first_printk(KERN_WARNING, sdkp, |
3128 | "No Caching mode page found\n"); | |
984f1733 AS |
3129 | goto defaults; |
3130 | ||
0bcaa111 | 3131 | Page_found: |
631e8a13 AV |
3132 | if (modepage == 8) { |
3133 | sdkp->WCE = ((buffer[offset + 2] & 0x04) != 0); | |
3134 | sdkp->RCD = ((buffer[offset + 2] & 0x01) != 0); | |
3135 | } else { | |
3136 | sdkp->WCE = ((buffer[offset + 2] & 0x01) == 0); | |
3137 | sdkp->RCD = 0; | |
3138 | } | |
1da177e4 | 3139 | |
007365ad | 3140 | sdkp->DPOFUA = (data.device_specific & 0x10) != 0; |
b14bf2d0 AS |
3141 | if (sdp->broken_fua) { |
3142 | sd_first_printk(KERN_NOTICE, sdkp, "Disabling FUA\n"); | |
3143 | sdkp->DPOFUA = 0; | |
26f28197 DLM |
3144 | } else if (sdkp->DPOFUA && !sdkp->device->use_10_for_rw && |
3145 | !sdkp->device->use_16_for_rw) { | |
b2bff6ce | 3146 | sd_first_printk(KERN_NOTICE, sdkp, |
e73aec82 | 3147 | "Uses READ/WRITE(6), disabling FUA\n"); |
007365ad TH |
3148 | sdkp->DPOFUA = 0; |
3149 | } | |
3150 | ||
2eefd57b SRT |
3151 | /* No cache flush allowed for write protected devices */ |
3152 | if (sdkp->WCE && sdkp->write_prot) | |
3153 | sdkp->WCE = 0; | |
3154 | ||
70a9b873 MP |
3155 | if (sdkp->first_scan || old_wce != sdkp->WCE || |
3156 | old_rcd != sdkp->RCD || old_dpofua != sdkp->DPOFUA) | |
3157 | sd_printk(KERN_NOTICE, sdkp, | |
3158 | "Write cache: %s, read cache: %s, %s\n", | |
3159 | sdkp->WCE ? "enabled" : "disabled", | |
3160 | sdkp->RCD ? "disabled" : "enabled", | |
3161 | sdkp->DPOFUA ? "supports DPO and FUA" | |
3162 | : "doesn't support DPO or FUA"); | |
1da177e4 LT |
3163 | |
3164 | return; | |
3165 | } | |
3166 | ||
3167 | bad_sense: | |
add2c24d | 3168 | if (res == -EIO && scsi_sense_valid(&sshdr) && |
1da177e4 LT |
3169 | sshdr.sense_key == ILLEGAL_REQUEST && |
3170 | sshdr.asc == 0x24 && sshdr.ascq == 0x0) | |
e73aec82 | 3171 | /* Invalid field in CDB */ |
b2bff6ce | 3172 | sd_first_printk(KERN_NOTICE, sdkp, "Cache data unavailable\n"); |
1da177e4 | 3173 | else |
b2bff6ce MP |
3174 | sd_first_printk(KERN_ERR, sdkp, |
3175 | "Asking for cache data failed\n"); | |
1da177e4 LT |
3176 | |
3177 | defaults: | |
b81478d8 | 3178 | if (sdp->wce_default_on) { |
b2bff6ce MP |
3179 | sd_first_printk(KERN_NOTICE, sdkp, |
3180 | "Assuming drive cache: write back\n"); | |
b81478d8 NJ |
3181 | sdkp->WCE = 1; |
3182 | } else { | |
c4da1205 | 3183 | sd_first_printk(KERN_WARNING, sdkp, |
b2bff6ce | 3184 | "Assuming drive cache: write through\n"); |
b81478d8 NJ |
3185 | sdkp->WCE = 0; |
3186 | } | |
1da177e4 | 3187 | sdkp->RCD = 0; |
48970800 | 3188 | sdkp->DPOFUA = 0; |
1da177e4 LT |
3189 | } |
3190 | ||
4f53138f BVA |
3191 | static bool sd_is_perm_stream(struct scsi_disk *sdkp, unsigned int stream_id) |
3192 | { | |
3193 | u8 cdb[16] = { SERVICE_ACTION_IN_16, SAI_GET_STREAM_STATUS }; | |
3194 | struct { | |
3195 | struct scsi_stream_status_header h; | |
3196 | struct scsi_stream_status s; | |
3197 | } buf; | |
3198 | struct scsi_device *sdev = sdkp->device; | |
3199 | struct scsi_sense_hdr sshdr; | |
3200 | const struct scsi_exec_args exec_args = { | |
3201 | .sshdr = &sshdr, | |
3202 | }; | |
3203 | int res; | |
3204 | ||
3205 | put_unaligned_be16(stream_id, &cdb[4]); | |
3206 | put_unaligned_be32(sizeof(buf), &cdb[10]); | |
3207 | ||
3208 | res = scsi_execute_cmd(sdev, cdb, REQ_OP_DRV_IN, &buf, sizeof(buf), | |
3209 | SD_TIMEOUT, sdkp->max_retries, &exec_args); | |
3210 | if (res < 0) | |
3211 | return false; | |
3212 | if (scsi_status_is_check_condition(res) && scsi_sense_valid(&sshdr)) | |
3213 | sd_print_sense_hdr(sdkp, &sshdr); | |
3214 | if (res) | |
3215 | return false; | |
3216 | if (get_unaligned_be32(&buf.h.len) < sizeof(struct scsi_stream_status)) | |
3217 | return false; | |
cd6856d3 | 3218 | return buf.s.perm; |
4f53138f BVA |
3219 | } |
3220 | ||
3221 | static void sd_read_io_hints(struct scsi_disk *sdkp, unsigned char *buffer) | |
3222 | { | |
3223 | struct scsi_device *sdp = sdkp->device; | |
3224 | const struct scsi_io_group_descriptor *desc, *start, *end; | |
961990ef | 3225 | u16 permanent_stream_count_old; |
4f53138f BVA |
3226 | struct scsi_sense_hdr sshdr; |
3227 | struct scsi_mode_data data; | |
3228 | int res; | |
3229 | ||
633aeefa BVA |
3230 | if (sdp->sdev_bflags & BLIST_SKIP_IO_HINTS) |
3231 | return; | |
3232 | ||
4f53138f BVA |
3233 | res = scsi_mode_sense(sdp, /*dbd=*/0x8, /*modepage=*/0x0a, |
3234 | /*subpage=*/0x05, buffer, SD_BUF_SIZE, SD_TIMEOUT, | |
3235 | sdkp->max_retries, &data, &sshdr); | |
3236 | if (res < 0) | |
3237 | return; | |
3238 | start = (void *)buffer + data.header_length + 16; | |
3239 | end = (void *)buffer + ALIGN_DOWN(data.header_length + data.length, | |
3240 | sizeof(*end)); | |
3241 | /* | |
3242 | * From "SBC-5 Constrained Streams with Data Lifetimes": Device severs | |
3243 | * should assign the lowest numbered stream identifiers to permanent | |
3244 | * streams. | |
3245 | */ | |
3246 | for (desc = start; desc < end; desc++) | |
3247 | if (!desc->st_enble || !sd_is_perm_stream(sdkp, desc - start)) | |
3248 | break; | |
961990ef | 3249 | permanent_stream_count_old = sdkp->permanent_stream_count; |
4f53138f BVA |
3250 | sdkp->permanent_stream_count = desc - start; |
3251 | if (sdkp->rscs && sdkp->permanent_stream_count < 2) | |
3252 | sd_printk(KERN_INFO, sdkp, | |
3253 | "Unexpected: RSCS has been set and the permanent stream count is %u\n", | |
3254 | sdkp->permanent_stream_count); | |
961990ef | 3255 | else if (sdkp->permanent_stream_count != permanent_stream_count_old) |
4f53138f BVA |
3256 | sd_printk(KERN_INFO, sdkp, "permanent stream count = %d\n", |
3257 | sdkp->permanent_stream_count); | |
3258 | } | |
3259 | ||
e0597d70 MP |
3260 | /* |
3261 | * The ATO bit indicates whether the DIF application tag is available | |
3262 | * for use by the operating system. | |
3263 | */ | |
439d77f7 | 3264 | static void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer) |
e0597d70 MP |
3265 | { |
3266 | int res, offset; | |
3267 | struct scsi_device *sdp = sdkp->device; | |
3268 | struct scsi_mode_data data; | |
3269 | struct scsi_sense_hdr sshdr; | |
3270 | ||
89d94756 | 3271 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) |
e0597d70 MP |
3272 | return; |
3273 | ||
3274 | if (sdkp->protection_type == 0) | |
3275 | return; | |
3276 | ||
a6cdc35f | 3277 | res = scsi_mode_sense(sdp, 1, 0x0a, 0, buffer, 36, SD_TIMEOUT, |
0610959f | 3278 | sdkp->max_retries, &data, &sshdr); |
e0597d70 | 3279 | |
8793613d | 3280 | if (res < 0 || !data.header_length || |
e0597d70 | 3281 | data.length < 6) { |
b2bff6ce | 3282 | sd_first_printk(KERN_WARNING, sdkp, |
e0597d70 MP |
3283 | "getting Control mode page failed, assume no ATO\n"); |
3284 | ||
add2c24d | 3285 | if (res == -EIO && scsi_sense_valid(&sshdr)) |
e0597d70 MP |
3286 | sd_print_sense_hdr(sdkp, &sshdr); |
3287 | ||
3288 | return; | |
3289 | } | |
3290 | ||
3291 | offset = data.header_length + data.block_descriptor_length; | |
3292 | ||
3293 | if ((buffer[offset] & 0x3f) != 0x0a) { | |
b2bff6ce | 3294 | sd_first_printk(KERN_ERR, sdkp, "ATO Got wrong page\n"); |
e0597d70 MP |
3295 | return; |
3296 | } | |
3297 | ||
3298 | if ((buffer[offset + 5] & 0x80) == 0) | |
3299 | return; | |
3300 | ||
3301 | sdkp->ATO = 1; | |
3302 | ||
3303 | return; | |
3304 | } | |
3305 | ||
f1e8185f CH |
3306 | static unsigned int sd_discard_mode(struct scsi_disk *sdkp) |
3307 | { | |
cbaac689 MP |
3308 | if (!sdkp->lbpme) |
3309 | return SD_LBP_FULL; | |
3310 | ||
f1e8185f CH |
3311 | if (!sdkp->lbpvpd) { |
3312 | /* LBP VPD page not provided */ | |
3313 | if (sdkp->max_unmap_blocks) | |
3314 | return SD_LBP_UNMAP; | |
3315 | return SD_LBP_WS16; | |
3316 | } | |
3317 | ||
3318 | /* LBP VPD page tells us what to use */ | |
3319 | if (sdkp->lbpu && sdkp->max_unmap_blocks) | |
3320 | return SD_LBP_UNMAP; | |
3321 | if (sdkp->lbpws) | |
3322 | return SD_LBP_WS16; | |
3323 | if (sdkp->lbpws10) | |
3324 | return SD_LBP_WS10; | |
3325 | return SD_LBP_DISABLE; | |
3326 | } | |
3327 | ||
804e498e CH |
3328 | /* |
3329 | * Query disk device for preferred I/O sizes. | |
d11b6916 | 3330 | */ |
804e498e CH |
3331 | static void sd_read_block_limits(struct scsi_disk *sdkp, |
3332 | struct queue_limits *lim) | |
d11b6916 | 3333 | { |
7fb019c4 | 3334 | struct scsi_vpd *vpd; |
d11b6916 | 3335 | |
7fb019c4 | 3336 | rcu_read_lock(); |
d11b6916 | 3337 | |
7fb019c4 MP |
3338 | vpd = rcu_dereference(sdkp->device->vpd_pgb0); |
3339 | if (!vpd || vpd->len < 16) | |
e3deec09 | 3340 | goto out; |
ca369d51 | 3341 | |
631669a2 | 3342 | sdkp->min_xfer_blocks = get_unaligned_be16(&vpd->data[6]); |
7fb019c4 MP |
3343 | sdkp->max_xfer_blocks = get_unaligned_be32(&vpd->data[8]); |
3344 | sdkp->opt_xfer_blocks = get_unaligned_be32(&vpd->data[12]); | |
d11b6916 | 3345 | |
7fb019c4 | 3346 | if (vpd->len >= 64) { |
c98a0eb0 | 3347 | unsigned int lba_count, desc_count; |
e339c1a7 | 3348 | |
7fb019c4 | 3349 | sdkp->max_ws_blocks = (u32)get_unaligned_be64(&vpd->data[36]); |
e339c1a7 | 3350 | |
c98a0eb0 | 3351 | if (!sdkp->lbpme) |
bf4ae8f2 | 3352 | goto config_atomic; |
045d3fe7 | 3353 | |
7fb019c4 MP |
3354 | lba_count = get_unaligned_be32(&vpd->data[20]); |
3355 | desc_count = get_unaligned_be32(&vpd->data[24]); | |
045d3fe7 | 3356 | |
c98a0eb0 MP |
3357 | if (lba_count && desc_count) |
3358 | sdkp->max_unmap_blocks = lba_count; | |
e339c1a7 | 3359 | |
7fb019c4 | 3360 | sdkp->unmap_granularity = get_unaligned_be32(&vpd->data[28]); |
e339c1a7 | 3361 | |
7fb019c4 | 3362 | if (vpd->data[32] & 0x80) |
c98a0eb0 | 3363 | sdkp->unmap_alignment = |
7fb019c4 | 3364 | get_unaligned_be32(&vpd->data[32]) & ~(1 << 31); |
c98a0eb0 | 3365 | |
bf4ae8f2 JG |
3366 | config_atomic: |
3367 | sdkp->max_atomic = get_unaligned_be32(&vpd->data[44]); | |
3368 | sdkp->atomic_alignment = get_unaligned_be32(&vpd->data[48]); | |
3369 | sdkp->atomic_granularity = get_unaligned_be32(&vpd->data[52]); | |
3370 | sdkp->max_atomic_with_boundary = get_unaligned_be32(&vpd->data[56]); | |
3371 | sdkp->max_atomic_boundary = get_unaligned_be32(&vpd->data[60]); | |
3372 | ||
3373 | sd_config_atomic(sdkp, lim); | |
e339c1a7 MP |
3374 | } |
3375 | ||
e3deec09 | 3376 | out: |
7fb019c4 | 3377 | rcu_read_unlock(); |
d11b6916 MP |
3378 | } |
3379 | ||
96b171d6 BVA |
3380 | /* Parse the Block Limits Extension VPD page (0xb7) */ |
3381 | static void sd_read_block_limits_ext(struct scsi_disk *sdkp) | |
3382 | { | |
3383 | struct scsi_vpd *vpd; | |
3384 | ||
3385 | rcu_read_lock(); | |
3386 | vpd = rcu_dereference(sdkp->device->vpd_pgb7); | |
8889676c | 3387 | if (vpd && vpd->len >= 6) |
96b171d6 BVA |
3388 | sdkp->rscs = vpd->data[5] & 1; |
3389 | rcu_read_unlock(); | |
3390 | } | |
3391 | ||
804e498e CH |
3392 | /* Query block device characteristics */ |
3393 | static void sd_read_block_characteristics(struct scsi_disk *sdkp, | |
3394 | struct queue_limits *lim) | |
3821d768 | 3395 | { |
7fb019c4 | 3396 | struct scsi_vpd *vpd; |
3821d768 MP |
3397 | u16 rot; |
3398 | ||
7fb019c4 MP |
3399 | rcu_read_lock(); |
3400 | vpd = rcu_dereference(sdkp->device->vpd_pgb1); | |
3821d768 | 3401 | |
f81eaf08 | 3402 | if (!vpd || vpd->len <= 8) { |
7fb019c4 MP |
3403 | rcu_read_unlock(); |
3404 | return; | |
3405 | } | |
3821d768 | 3406 | |
7fb019c4 | 3407 | rot = get_unaligned_be16(&vpd->data[4]); |
7437bb73 | 3408 | sdkp->zoned = (vpd->data[8] >> 4) & 3; |
7fb019c4 | 3409 | rcu_read_unlock(); |
3821d768 | 3410 | |
39a9f1c3 CH |
3411 | if (rot == 1) |
3412 | lim->features &= ~(BLK_FEAT_ROTATIONAL | BLK_FEAT_ADD_RANDOM); | |
27ba3e8f DLM |
3413 | |
3414 | if (!sdkp->first_scan) | |
7fb019c4 | 3415 | return; |
27ba3e8f | 3416 | |
308ad58a | 3417 | if (sdkp->device->type == TYPE_ZBC) |
7437bb73 CH |
3418 | sd_printk(KERN_NOTICE, sdkp, "Host-managed zoned block device\n"); |
3419 | else if (sdkp->zoned == 1) | |
3420 | sd_printk(KERN_NOTICE, sdkp, "Host-aware SMR disk used as regular disk\n"); | |
3421 | else if (sdkp->zoned == 2) | |
3422 | sd_printk(KERN_NOTICE, sdkp, "Drive-managed SMR disk\n"); | |
3821d768 MP |
3423 | } |
3424 | ||
045d3fe7 | 3425 | /** |
c98a0eb0 | 3426 | * sd_read_block_provisioning - Query provisioning VPD page |
7529fbb0 | 3427 | * @sdkp: disk to query |
045d3fe7 | 3428 | */ |
c98a0eb0 | 3429 | static void sd_read_block_provisioning(struct scsi_disk *sdkp) |
045d3fe7 | 3430 | { |
7fb019c4 | 3431 | struct scsi_vpd *vpd; |
045d3fe7 | 3432 | |
c98a0eb0 | 3433 | if (sdkp->lbpme == 0) |
045d3fe7 MP |
3434 | return; |
3435 | ||
7fb019c4 MP |
3436 | rcu_read_lock(); |
3437 | vpd = rcu_dereference(sdkp->device->vpd_pgb2); | |
045d3fe7 | 3438 | |
7fb019c4 MP |
3439 | if (!vpd || vpd->len < 8) { |
3440 | rcu_read_unlock(); | |
3441 | return; | |
3442 | } | |
045d3fe7 | 3443 | |
c98a0eb0 | 3444 | sdkp->lbpvpd = 1; |
7fb019c4 MP |
3445 | sdkp->lbpu = (vpd->data[5] >> 7) & 1; /* UNMAP */ |
3446 | sdkp->lbpws = (vpd->data[5] >> 6) & 1; /* WRITE SAME(16) w/ UNMAP */ | |
3447 | sdkp->lbpws10 = (vpd->data[5] >> 5) & 1; /* WRITE SAME(10) w/ UNMAP */ | |
3448 | rcu_read_unlock(); | |
045d3fe7 MP |
3449 | } |
3450 | ||
5db44863 MP |
3451 | static void sd_read_write_same(struct scsi_disk *sdkp, unsigned char *buffer) |
3452 | { | |
66c28f97 MP |
3453 | struct scsi_device *sdev = sdkp->device; |
3454 | ||
54b2b50c MP |
3455 | if (sdev->host->no_write_same) { |
3456 | sdev->no_write_same = 1; | |
3457 | ||
3458 | return; | |
3459 | } | |
3460 | ||
152e52fb | 3461 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, INQUIRY, 0) < 0) { |
e38d9e83 | 3462 | struct scsi_vpd *vpd; |
af73623f | 3463 | |
66c28f97 MP |
3464 | sdev->no_report_opcodes = 1; |
3465 | ||
3466 | /* Disable WRITE SAME if REPORT SUPPORTED OPERATION | |
3467 | * CODES is unsupported and the device has an ATA | |
3468 | * Information VPD page (SAT). | |
3469 | */ | |
e38d9e83 MP |
3470 | rcu_read_lock(); |
3471 | vpd = rcu_dereference(sdev->vpd_pg89); | |
3472 | if (vpd) | |
66c28f97 | 3473 | sdev->no_write_same = 1; |
e38d9e83 | 3474 | rcu_read_unlock(); |
66c28f97 MP |
3475 | } |
3476 | ||
152e52fb | 3477 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME_16, 0) == 1) |
5db44863 | 3478 | sdkp->ws16 = 1; |
66c28f97 | 3479 | |
152e52fb | 3480 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME, 0) == 1) |
66c28f97 | 3481 | sdkp->ws10 = 1; |
5db44863 MP |
3482 | } |
3483 | ||
d80210f2 CH |
3484 | static void sd_read_security(struct scsi_disk *sdkp, unsigned char *buffer) |
3485 | { | |
3486 | struct scsi_device *sdev = sdkp->device; | |
3487 | ||
3488 | if (!sdev->security_supported) | |
3489 | return; | |
3490 | ||
3491 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, | |
152e52fb | 3492 | SECURITY_PROTOCOL_IN, 0) == 1 && |
d80210f2 | 3493 | scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, |
152e52fb | 3494 | SECURITY_PROTOCOL_OUT, 0) == 1) |
d80210f2 CH |
3495 | sdkp->security = 1; |
3496 | } | |
3497 | ||
e815d365 DLM |
3498 | static inline sector_t sd64_to_sectors(struct scsi_disk *sdkp, u8 *buf) |
3499 | { | |
3500 | return logical_to_sectors(sdkp->device, get_unaligned_be64(buf)); | |
3501 | } | |
3502 | ||
3503 | /** | |
3504 | * sd_read_cpr - Query concurrent positioning ranges | |
3505 | * @sdkp: disk to query | |
3506 | */ | |
3507 | static void sd_read_cpr(struct scsi_disk *sdkp) | |
3508 | { | |
3509 | struct blk_independent_access_ranges *iars = NULL; | |
3510 | unsigned char *buffer = NULL; | |
3511 | unsigned int nr_cpr = 0; | |
3512 | int i, vpd_len, buf_len = SD_BUF_SIZE; | |
3513 | u8 *desc; | |
3514 | ||
3515 | /* | |
3516 | * We need to have the capacity set first for the block layer to be | |
3517 | * able to check the ranges. | |
3518 | */ | |
3519 | if (sdkp->first_scan) | |
3520 | return; | |
3521 | ||
3522 | if (!sdkp->capacity) | |
3523 | goto out; | |
3524 | ||
3525 | /* | |
3526 | * Concurrent Positioning Ranges VPD: there can be at most 256 ranges, | |
3527 | * leading to a maximum page size of 64 + 256*32 bytes. | |
3528 | */ | |
3529 | buf_len = 64 + 256*32; | |
3530 | buffer = kmalloc(buf_len, GFP_KERNEL); | |
3531 | if (!buffer || scsi_get_vpd_page(sdkp->device, 0xb9, buffer, buf_len)) | |
3532 | goto out; | |
3533 | ||
3534 | /* We must have at least a 64B header and one 32B range descriptor */ | |
f92de9d1 | 3535 | vpd_len = get_unaligned_be16(&buffer[2]) + 4; |
e815d365 DLM |
3536 | if (vpd_len > buf_len || vpd_len < 64 + 32 || (vpd_len & 31)) { |
3537 | sd_printk(KERN_ERR, sdkp, | |
3538 | "Invalid Concurrent Positioning Ranges VPD page\n"); | |
3539 | goto out; | |
3540 | } | |
3541 | ||
3542 | nr_cpr = (vpd_len - 64) / 32; | |
3543 | if (nr_cpr == 1) { | |
3544 | nr_cpr = 0; | |
3545 | goto out; | |
3546 | } | |
3547 | ||
3548 | iars = disk_alloc_independent_access_ranges(sdkp->disk, nr_cpr); | |
3549 | if (!iars) { | |
3550 | nr_cpr = 0; | |
3551 | goto out; | |
3552 | } | |
3553 | ||
3554 | desc = &buffer[64]; | |
3555 | for (i = 0; i < nr_cpr; i++, desc += 32) { | |
3556 | if (desc[0] != i) { | |
3557 | sd_printk(KERN_ERR, sdkp, | |
3558 | "Invalid Concurrent Positioning Range number\n"); | |
3559 | nr_cpr = 0; | |
3560 | break; | |
3561 | } | |
3562 | ||
3563 | iars->ia_range[i].sector = sd64_to_sectors(sdkp, desc + 8); | |
3564 | iars->ia_range[i].nr_sectors = sd64_to_sectors(sdkp, desc + 16); | |
3565 | } | |
3566 | ||
3567 | out: | |
3568 | disk_set_independent_access_ranges(sdkp->disk, iars); | |
3569 | if (nr_cpr && sdkp->nr_actuators != nr_cpr) { | |
3570 | sd_printk(KERN_NOTICE, sdkp, | |
3571 | "%u concurrent positioning ranges\n", nr_cpr); | |
3572 | sdkp->nr_actuators = nr_cpr; | |
3573 | } | |
3574 | ||
3575 | kfree(buffer); | |
3576 | } | |
3577 | ||
631669a2 MP |
3578 | static bool sd_validate_min_xfer_size(struct scsi_disk *sdkp) |
3579 | { | |
3580 | struct scsi_device *sdp = sdkp->device; | |
3581 | unsigned int min_xfer_bytes = | |
3582 | logical_to_bytes(sdp, sdkp->min_xfer_blocks); | |
3583 | ||
3584 | if (sdkp->min_xfer_blocks == 0) | |
3585 | return false; | |
3586 | ||
3587 | if (min_xfer_bytes & (sdkp->physical_block_size - 1)) { | |
3588 | sd_first_printk(KERN_WARNING, sdkp, | |
3589 | "Preferred minimum I/O size %u bytes not a " \ | |
3590 | "multiple of physical block size (%u bytes)\n", | |
3591 | min_xfer_bytes, sdkp->physical_block_size); | |
3592 | sdkp->min_xfer_blocks = 0; | |
3593 | return false; | |
3594 | } | |
3595 | ||
3596 | sd_first_printk(KERN_INFO, sdkp, "Preferred minimum I/O size %u bytes\n", | |
3597 | min_xfer_bytes); | |
3598 | return true; | |
3599 | } | |
3600 | ||
a83da8a4 MP |
3601 | /* |
3602 | * Determine the device's preferred I/O size for reads and writes | |
3603 | * unless the reported value is unreasonably small, large, not a | |
3604 | * multiple of the physical block size, or simply garbage. | |
3605 | */ | |
3606 | static bool sd_validate_opt_xfer_size(struct scsi_disk *sdkp, | |
3607 | unsigned int dev_max) | |
3608 | { | |
3609 | struct scsi_device *sdp = sdkp->device; | |
3610 | unsigned int opt_xfer_bytes = | |
3611 | logical_to_bytes(sdp, sdkp->opt_xfer_blocks); | |
631669a2 MP |
3612 | unsigned int min_xfer_bytes = |
3613 | logical_to_bytes(sdp, sdkp->min_xfer_blocks); | |
a83da8a4 | 3614 | |
1d5de5bd MP |
3615 | if (sdkp->opt_xfer_blocks == 0) |
3616 | return false; | |
3617 | ||
a83da8a4 MP |
3618 | if (sdkp->opt_xfer_blocks > dev_max) { |
3619 | sd_first_printk(KERN_WARNING, sdkp, | |
3620 | "Optimal transfer size %u logical blocks " \ | |
3621 | "> dev_max (%u logical blocks)\n", | |
3622 | sdkp->opt_xfer_blocks, dev_max); | |
3623 | return false; | |
3624 | } | |
3625 | ||
3626 | if (sdkp->opt_xfer_blocks > SD_DEF_XFER_BLOCKS) { | |
3627 | sd_first_printk(KERN_WARNING, sdkp, | |
3628 | "Optimal transfer size %u logical blocks " \ | |
3629 | "> sd driver limit (%u logical blocks)\n", | |
3630 | sdkp->opt_xfer_blocks, SD_DEF_XFER_BLOCKS); | |
3631 | return false; | |
3632 | } | |
3633 | ||
3634 | if (opt_xfer_bytes < PAGE_SIZE) { | |
3635 | sd_first_printk(KERN_WARNING, sdkp, | |
3636 | "Optimal transfer size %u bytes < " \ | |
3637 | "PAGE_SIZE (%u bytes)\n", | |
3638 | opt_xfer_bytes, (unsigned int)PAGE_SIZE); | |
3639 | return false; | |
3640 | } | |
3641 | ||
631669a2 MP |
3642 | if (min_xfer_bytes && opt_xfer_bytes % min_xfer_bytes) { |
3643 | sd_first_printk(KERN_WARNING, sdkp, | |
3644 | "Optimal transfer size %u bytes not a " \ | |
3645 | "multiple of preferred minimum block " \ | |
3646 | "size (%u bytes)\n", | |
3647 | opt_xfer_bytes, min_xfer_bytes); | |
3648 | return false; | |
3649 | } | |
3650 | ||
a83da8a4 MP |
3651 | if (opt_xfer_bytes & (sdkp->physical_block_size - 1)) { |
3652 | sd_first_printk(KERN_WARNING, sdkp, | |
3653 | "Optimal transfer size %u bytes not a " \ | |
3654 | "multiple of physical block size (%u bytes)\n", | |
3655 | opt_xfer_bytes, sdkp->physical_block_size); | |
3656 | return false; | |
3657 | } | |
3658 | ||
3659 | sd_first_printk(KERN_INFO, sdkp, "Optimal transfer size %u bytes\n", | |
3660 | opt_xfer_bytes); | |
3661 | return true; | |
3662 | } | |
3663 | ||
321da3dc MP |
3664 | static void sd_read_block_zero(struct scsi_disk *sdkp) |
3665 | { | |
7926d51f MP |
3666 | struct scsi_device *sdev = sdkp->device; |
3667 | unsigned int buf_len = sdev->sector_size; | |
3668 | u8 *buffer, cmd[16] = { }; | |
321da3dc MP |
3669 | |
3670 | buffer = kmalloc(buf_len, GFP_KERNEL); | |
3671 | if (!buffer) | |
3672 | return; | |
3673 | ||
7926d51f MP |
3674 | if (sdev->use_16_for_rw) { |
3675 | cmd[0] = READ_16; | |
3676 | put_unaligned_be64(0, &cmd[2]); /* Logical block address 0 */ | |
3677 | put_unaligned_be32(1, &cmd[10]);/* Transfer 1 logical block */ | |
3678 | } else { | |
3679 | cmd[0] = READ_10; | |
3680 | put_unaligned_be32(0, &cmd[2]); /* Logical block address 0 */ | |
3681 | put_unaligned_be16(1, &cmd[7]); /* Transfer 1 logical block */ | |
3682 | } | |
321da3dc MP |
3683 | |
3684 | scsi_execute_cmd(sdkp->device, cmd, REQ_OP_DRV_IN, buffer, buf_len, | |
3685 | SD_TIMEOUT, sdkp->max_retries, NULL); | |
3686 | kfree(buffer); | |
3687 | } | |
3688 | ||
1da177e4 LT |
3689 | /** |
3690 | * sd_revalidate_disk - called the first time a new disk is seen, | |
3691 | * performs disk spin up, read_capacity, etc. | |
3692 | * @disk: struct gendisk we care about | |
3693 | **/ | |
3694 | static int sd_revalidate_disk(struct gendisk *disk) | |
3695 | { | |
3696 | struct scsi_disk *sdkp = scsi_disk(disk); | |
3697 | struct scsi_device *sdp = sdkp->device; | |
89d94756 | 3698 | sector_t old_capacity = sdkp->capacity; |
804e498e | 3699 | struct queue_limits lim; |
1da177e4 | 3700 | unsigned char *buffer; |
a2363464 | 3701 | unsigned int dev_max; |
804e498e | 3702 | int err; |
1da177e4 | 3703 | |
fa0d34be MP |
3704 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, |
3705 | "sd_revalidate_disk\n")); | |
1da177e4 LT |
3706 | |
3707 | /* | |
3708 | * If the device is offline, don't try and read capacity or any | |
3709 | * of the other niceties. | |
3710 | */ | |
3711 | if (!scsi_device_online(sdp)) | |
3712 | goto out; | |
3713 | ||
a6123f14 | 3714 | buffer = kmalloc(SD_BUF_SIZE, GFP_KERNEL); |
1da177e4 | 3715 | if (!buffer) { |
e73aec82 MP |
3716 | sd_printk(KERN_WARNING, sdkp, "sd_revalidate_disk: Memory " |
3717 | "allocation failure.\n"); | |
ea73a9f2 | 3718 | goto out; |
1da177e4 LT |
3719 | } |
3720 | ||
e73aec82 | 3721 | sd_spinup_disk(sdkp); |
1da177e4 | 3722 | |
804e498e CH |
3723 | lim = queue_limits_start_update(sdkp->disk->queue); |
3724 | ||
1da177e4 LT |
3725 | /* |
3726 | * Without media there is no reason to ask; moreover, some devices | |
3727 | * react badly if we do. | |
3728 | */ | |
3729 | if (sdkp->media_present) { | |
804e498e | 3730 | sd_read_capacity(sdkp, &lim, buffer); |
321da3dc MP |
3731 | /* |
3732 | * Some USB/UAS devices return generic values for mode pages | |
3733 | * until the media has been accessed. Trigger a READ operation | |
3734 | * to force the device to populate mode pages. | |
3735 | */ | |
3736 | if (sdp->read_before_ms) | |
3737 | sd_read_block_zero(sdkp); | |
e4a05698 JB |
3738 | /* |
3739 | * set the default to rotational. All non-rotational devices | |
3740 | * support the block characteristics VPD page, which will | |
3741 | * cause this to be updated correctly and any device which | |
3742 | * doesn't support it should be treated as rotational. | |
3743 | */ | |
39a9f1c3 | 3744 | lim.features |= (BLK_FEAT_ROTATIONAL | BLK_FEAT_ADD_RANDOM); |
e4a05698 | 3745 | |
5ddfe085 | 3746 | if (scsi_device_supports_vpd(sdp)) { |
c98a0eb0 | 3747 | sd_read_block_provisioning(sdkp); |
804e498e | 3748 | sd_read_block_limits(sdkp, &lim); |
96b171d6 | 3749 | sd_read_block_limits_ext(sdkp); |
804e498e CH |
3750 | sd_read_block_characteristics(sdkp, &lim); |
3751 | sd_zbc_read_zones(sdkp, &lim, buffer); | |
ffd4bc2a MP |
3752 | } |
3753 | ||
f874d721 LF |
3754 | sd_config_discard(sdkp, &lim, sd_discard_mode(sdkp)); |
3755 | ||
89d94756 HR |
3756 | sd_print_capacity(sdkp, old_capacity); |
3757 | ||
e73aec82 MP |
3758 | sd_read_write_protect_flag(sdkp, buffer); |
3759 | sd_read_cache_type(sdkp, buffer); | |
4f53138f | 3760 | sd_read_io_hints(sdkp, buffer); |
e0597d70 | 3761 | sd_read_app_tag_own(sdkp, buffer); |
5db44863 | 3762 | sd_read_write_same(sdkp, buffer); |
d80210f2 | 3763 | sd_read_security(sdkp, buffer); |
c6e56cf6 | 3764 | sd_config_protection(sdkp, &lim); |
1da177e4 | 3765 | } |
461d4e90 TH |
3766 | |
3767 | /* | |
3768 | * We now have all cache related info, determine how we deal | |
4913efe4 | 3769 | * with flush requests. |
461d4e90 | 3770 | */ |
1122c0c1 | 3771 | sd_set_flush_flag(sdkp, &lim); |
461d4e90 | 3772 | |
ca369d51 MP |
3773 | /* Initial block count limit based on CDB TRANSFER LENGTH field size. */ |
3774 | dev_max = sdp->use_16_for_rw ? SD_MAX_XFER_BLOCKS : SD_DEF_XFER_BLOCKS; | |
3775 | ||
3776 | /* Some devices report a maximum block count for READ/WRITE requests. */ | |
3777 | dev_max = min_not_zero(dev_max, sdkp->max_xfer_blocks); | |
804e498e | 3778 | lim.max_dev_sectors = logical_to_sectors(sdp, dev_max); |
ca369d51 | 3779 | |
631669a2 | 3780 | if (sd_validate_min_xfer_size(sdkp)) |
804e498e | 3781 | lim.io_min = logical_to_bytes(sdp, sdkp->min_xfer_blocks); |
631669a2 | 3782 | else |
804e498e | 3783 | lim.io_min = 0; |
3a9794d3 | 3784 | |
c9337ad4 JG |
3785 | /* |
3786 | * Limit default to SCSI host optimal sector limit if set. There may be | |
3787 | * an impact on performance for when the size of a request exceeds this | |
3788 | * host limit. | |
3789 | */ | |
804e498e | 3790 | lim.io_opt = sdp->host->opt_sectors << SECTOR_SHIFT; |
a2363464 | 3791 | if (sd_validate_opt_xfer_size(sdkp, dev_max)) { |
804e498e | 3792 | lim.io_opt = min_not_zero(lim.io_opt, |
a2363464 | 3793 | logical_to_bytes(sdp, sdkp->opt_xfer_blocks)); |
bafea1c5 | 3794 | } |
77082ca5 MP |
3795 | |
3796 | sdkp->first_scan = 0; | |
4f258a46 | 3797 | |
449f4ec9 | 3798 | set_capacity_and_notify(disk, logical_to_sectors(sdp, sdkp->capacity)); |
804e498e | 3799 | sd_config_write_same(sdkp, &lim); |
1da177e4 LT |
3800 | kfree(buffer); |
3801 | ||
aa427d7b | 3802 | err = queue_limits_commit_update_frozen(sdkp->disk->queue, &lim); |
804e498e CH |
3803 | if (err) |
3804 | return err; | |
3805 | ||
ffed586b SK |
3806 | /* |
3807 | * Query concurrent positioning ranges after | |
3808 | * queue_limits_commit_update() unlocked q->limits_lock to avoid | |
3809 | * deadlock with q->sysfs_dir_lock and q->sysfs_lock. | |
3810 | */ | |
3811 | if (sdkp->media_present && scsi_device_supports_vpd(sdp)) | |
3812 | sd_read_cpr(sdkp); | |
3813 | ||
a3d8a257 DLM |
3814 | /* |
3815 | * For a zoned drive, revalidating the zones can be done only once | |
3816 | * the gendisk capacity is set. So if this fails, set back the gendisk | |
3817 | * capacity to 0. | |
3818 | */ | |
3819 | if (sd_zbc_revalidate_zones(sdkp)) | |
449f4ec9 | 3820 | set_capacity_and_notify(disk, 0); |
a3d8a257 | 3821 | |
1da177e4 LT |
3822 | out: |
3823 | return 0; | |
3824 | } | |
3825 | ||
72ec24bd TH |
3826 | /** |
3827 | * sd_unlock_native_capacity - unlock native capacity | |
3828 | * @disk: struct gendisk to set capacity for | |
3829 | * | |
3830 | * Block layer calls this function if it detects that partitions | |
3831 | * on @disk reach beyond the end of the device. If the SCSI host | |
3832 | * implements ->unlock_native_capacity() method, it's invoked to | |
3833 | * give it a chance to adjust the device capacity. | |
3834 | * | |
3835 | * CONTEXT: | |
3836 | * Defined by block layer. Might sleep. | |
3837 | */ | |
3838 | static void sd_unlock_native_capacity(struct gendisk *disk) | |
3839 | { | |
3840 | struct scsi_device *sdev = scsi_disk(disk)->device; | |
3841 | ||
3842 | if (sdev->host->hostt->unlock_native_capacity) | |
3843 | sdev->host->hostt->unlock_native_capacity(sdev); | |
3844 | } | |
3845 | ||
3e1a7ff8 TH |
3846 | /** |
3847 | * sd_format_disk_name - format disk name | |
3848 | * @prefix: name prefix - ie. "sd" for SCSI disks | |
3849 | * @index: index of the disk to format name for | |
3850 | * @buf: output buffer | |
3851 | * @buflen: length of the output buffer | |
3852 | * | |
3853 | * SCSI disk names starts at sda. The 26th device is sdz and the | |
3854 | * 27th is sdaa. The last one for two lettered suffix is sdzz | |
3855 | * which is followed by sdaaa. | |
3856 | * | |
3857 | * This is basically 26 base counting with one extra 'nil' entry | |
3ad2f3fb | 3858 | * at the beginning from the second digit on and can be |
3e1a7ff8 TH |
3859 | * determined using similar method as 26 base conversion with the |
3860 | * index shifted -1 after each digit is computed. | |
3861 | * | |
3862 | * CONTEXT: | |
3863 | * Don't care. | |
3864 | * | |
3865 | * RETURNS: | |
3866 | * 0 on success, -errno on failure. | |
3867 | */ | |
3868 | static int sd_format_disk_name(char *prefix, int index, char *buf, int buflen) | |
3869 | { | |
3870 | const int base = 'z' - 'a' + 1; | |
3871 | char *begin = buf + strlen(prefix); | |
3872 | char *end = buf + buflen; | |
3873 | char *p; | |
3874 | int unit; | |
3875 | ||
3876 | p = end - 1; | |
3877 | *p = '\0'; | |
3878 | unit = base; | |
3879 | do { | |
3880 | if (p == begin) | |
3881 | return -EINVAL; | |
3882 | *--p = 'a' + (index % unit); | |
3883 | index = (index / unit) - 1; | |
3884 | } while (index >= 0); | |
3885 | ||
3886 | memmove(begin, p, end - p); | |
3887 | memcpy(buf, prefix, strlen(prefix)); | |
3888 | ||
3889 | return 0; | |
3890 | } | |
3891 | ||
1da177e4 LT |
3892 | /** |
3893 | * sd_probe - called during driver initialization and whenever a | |
3894 | * new scsi device is attached to the system. It is called once | |
3895 | * for each scsi device (not just disks) present. | |
3896 | * @dev: pointer to device object | |
3897 | * | |
3898 | * Returns 0 if successful (or not interested in this scsi device | |
3899 | * (e.g. scanner)); 1 when there is an error. | |
3900 | * | |
3901 | * Note: this function is invoked from the scsi mid-level. | |
3902 | * This function sets up the mapping between a given | |
3903 | * <host,channel,id,lun> (found in sdp) and new device name | |
3904 | * (e.g. /dev/sda). More precisely it is the block device major | |
3905 | * and minor number that is chosen here. | |
3906 | * | |
2db93ce8 PU |
3907 | * Assume sd_probe is not re-entrant (for time being) |
3908 | * Also think about sd_probe() and sd_remove() running coincidentally. | |
1da177e4 LT |
3909 | **/ |
3910 | static int sd_probe(struct device *dev) | |
3911 | { | |
3912 | struct scsi_device *sdp = to_scsi_device(dev); | |
3913 | struct scsi_disk *sdkp; | |
3914 | struct gendisk *gd; | |
439d77f7 | 3915 | int index; |
1da177e4 LT |
3916 | int error; |
3917 | ||
6fe8c1db | 3918 | scsi_autopm_get_device(sdp); |
1da177e4 | 3919 | error = -ENODEV; |
89d94756 HR |
3920 | if (sdp->type != TYPE_DISK && |
3921 | sdp->type != TYPE_ZBC && | |
3922 | sdp->type != TYPE_MOD && | |
3923 | sdp->type != TYPE_RBC) | |
1da177e4 LT |
3924 | goto out; |
3925 | ||
bf1b4659 DLM |
3926 | if (!IS_ENABLED(CONFIG_BLK_DEV_ZONED) && sdp->type == TYPE_ZBC) { |
3927 | sdev_printk(KERN_WARNING, sdp, | |
3928 | "Unsupported ZBC host-managed device.\n"); | |
89d94756 | 3929 | goto out; |
bf1b4659 DLM |
3930 | } |
3931 | ||
9ccfc756 | 3932 | SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO, sdp, |
2db93ce8 | 3933 | "sd_probe\n")); |
1da177e4 LT |
3934 | |
3935 | error = -ENOMEM; | |
24669f75 | 3936 | sdkp = kzalloc(sizeof(*sdkp), GFP_KERNEL); |
1da177e4 LT |
3937 | if (!sdkp) |
3938 | goto out; | |
3939 | ||
6f8191fd CH |
3940 | gd = blk_mq_alloc_disk_for_queue(sdp->request_queue, |
3941 | &sd_bio_compl_lkclass); | |
1da177e4 | 3942 | if (!gd) |
c01228db | 3943 | goto out_free; |
1da177e4 | 3944 | |
94015080 MW |
3945 | index = ida_alloc(&sd_index_ida, GFP_KERNEL); |
3946 | if (index < 0) { | |
21208ae5 | 3947 | sdev_printk(KERN_WARNING, sdp, "sd_probe: memory exhausted.\n"); |
1da177e4 | 3948 | goto out_put; |
1a03ae0f MR |
3949 | } |
3950 | ||
3e1a7ff8 | 3951 | error = sd_format_disk_name("sd", index, gd->disk_name, DISK_NAME_LEN); |
21208ae5 DK |
3952 | if (error) { |
3953 | sdev_printk(KERN_WARNING, sdp, "SCSI disk (sd) name length exceeded.\n"); | |
f27bac27 | 3954 | goto out_free_index; |
21208ae5 | 3955 | } |
f27bac27 | 3956 | |
1da177e4 | 3957 | sdkp->device = sdp; |
1da177e4 LT |
3958 | sdkp->disk = gd; |
3959 | sdkp->index = index; | |
0610959f | 3960 | sdkp->max_retries = SD_MAX_RETRIES; |
409f3499 | 3961 | atomic_set(&sdkp->openers, 0); |
9e1a1537 | 3962 | atomic_set(&sdkp->device->ioerr_cnt, 0); |
1da177e4 | 3963 | |
601e7638 JB |
3964 | if (!sdp->request_queue->rq_timeout) { |
3965 | if (sdp->type != TYPE_MOD) | |
3966 | blk_queue_rq_timeout(sdp->request_queue, SD_TIMEOUT); | |
3967 | else | |
3968 | blk_queue_rq_timeout(sdp->request_queue, | |
3969 | SD_MOD_TIMEOUT); | |
3970 | } | |
3971 | ||
fad45c30 CH |
3972 | device_initialize(&sdkp->disk_dev); |
3973 | sdkp->disk_dev.parent = get_device(dev); | |
3974 | sdkp->disk_dev.class = &sd_disk_class; | |
3975 | dev_set_name(&sdkp->disk_dev, "%s", dev_name(dev)); | |
601e7638 | 3976 | |
fad45c30 | 3977 | error = device_add(&sdkp->disk_dev); |
265dfe8e | 3978 | if (error) { |
fad45c30 | 3979 | put_device(&sdkp->disk_dev); |
265dfe8e ML |
3980 | goto out; |
3981 | } | |
601e7638 | 3982 | |
478a8a05 | 3983 | dev_set_drvdata(dev, sdkp); |
601e7638 | 3984 | |
82a54da6 BVA |
3985 | gd->major = sd_major((index & 0xf0) >> 4); |
3986 | gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00); | |
a58bd768 | 3987 | gd->minors = SD_MINORS; |
82a54da6 BVA |
3988 | |
3989 | gd->fops = &sd_fops; | |
e7f76552 | 3990 | gd->private_data = sdkp; |
82a54da6 BVA |
3991 | |
3992 | /* defaults, until the device tells us otherwise */ | |
3993 | sdp->sector_size = 512; | |
3994 | sdkp->capacity = 0; | |
3995 | sdkp->media_present = 1; | |
3996 | sdkp->write_prot = 0; | |
3997 | sdkp->cache_override = 0; | |
3998 | sdkp->WCE = 0; | |
3999 | sdkp->RCD = 0; | |
4000 | sdkp->ATO = 0; | |
4001 | sdkp->first_scan = 1; | |
4002 | sdkp->max_medium_access_timeouts = SD_MAX_MEDIUM_TIMEOUTS; | |
4003 | ||
4004 | sd_revalidate_disk(gd); | |
4005 | ||
82a54da6 BVA |
4006 | if (sdp->removable) { |
4007 | gd->flags |= GENHD_FL_REMOVABLE; | |
4008 | gd->events |= DISK_EVENT_MEDIA_CHANGE; | |
4009 | gd->event_flags = DISK_EVENT_FLAG_POLL | DISK_EVENT_FLAG_UEVENT; | |
4010 | } | |
4011 | ||
4012 | blk_pm_runtime_init(sdp->request_queue, dev); | |
c74f8056 SC |
4013 | if (sdp->rpm_autosuspend) { |
4014 | pm_runtime_set_autosuspend_delay(dev, | |
4380e64a | 4015 | sdp->host->rpm_autosuspend_delay); |
c74f8056 | 4016 | } |
2a7a891f LC |
4017 | |
4018 | error = device_add_disk(dev, gd, NULL); | |
4019 | if (error) { | |
0296bea0 | 4020 | device_unregister(&sdkp->disk_dev); |
7274ce05 | 4021 | put_disk(gd); |
2a7a891f LC |
4022 | goto out; |
4023 | } | |
4024 | ||
82a54da6 | 4025 | if (sdkp->security) { |
0610959f | 4026 | sdkp->opal_dev = init_opal_dev(sdkp, &sd_sec_submit); |
82a54da6 BVA |
4027 | if (sdkp->opal_dev) |
4028 | sd_printk(KERN_NOTICE, sdkp, "supports TCG Opal\n"); | |
4029 | } | |
4030 | ||
4031 | sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n", | |
4032 | sdp->removable ? "removable " : ""); | |
4033 | scsi_autopm_put_device(sdp); | |
1da177e4 LT |
4034 | |
4035 | return 0; | |
4036 | ||
f27bac27 | 4037 | out_free_index: |
94015080 | 4038 | ida_free(&sd_index_ida, index); |
6bdaa1f1 | 4039 | out_put: |
1da177e4 | 4040 | put_disk(gd); |
f170396c CIK |
4041 | out_free: |
4042 | kfree(sdkp); | |
6bdaa1f1 | 4043 | out: |
6fe8c1db | 4044 | scsi_autopm_put_device(sdp); |
1da177e4 LT |
4045 | return error; |
4046 | } | |
4047 | ||
4048 | /** | |
4049 | * sd_remove - called whenever a scsi disk (previously recognized by | |
4050 | * sd_probe) is detached from the system. It is called (potentially | |
4051 | * multiple times) during sd module unload. | |
f2a3313d | 4052 | * @dev: pointer to device object |
1da177e4 LT |
4053 | * |
4054 | * Note: this function is invoked from the scsi mid-level. | |
4055 | * This function potentially frees up a device name (e.g. /dev/sdc) | |
4056 | * that could be re-used by a subsequent sd_probe(). | |
4057 | * This function is not called when the built-in sd driver is "exit-ed". | |
4058 | **/ | |
4059 | static int sd_remove(struct device *dev) | |
4060 | { | |
9c63f7f6 | 4061 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
1da177e4 | 4062 | |
478a8a05 AS |
4063 | scsi_autopm_get_device(sdkp->device); |
4064 | ||
fad45c30 | 4065 | device_del(&sdkp->disk_dev); |
1da177e4 | 4066 | del_gendisk(sdkp->disk); |
99398d20 DLM |
4067 | if (!sdkp->suspended) |
4068 | sd_shutdown(dev); | |
39b7f1e2 | 4069 | |
9c63f7f6 | 4070 | put_disk(sdkp->disk); |
1da177e4 LT |
4071 | return 0; |
4072 | } | |
4073 | ||
ee959b00 | 4074 | static void scsi_disk_release(struct device *dev) |
1da177e4 | 4075 | { |
ee959b00 | 4076 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
c14a5726 | 4077 | |
94015080 | 4078 | ida_free(&sd_index_ida, sdkp->index); |
c76c46fa | 4079 | put_device(&sdkp->device->sdev_gendev); |
534cf52a | 4080 | free_opal_dev(sdkp->opal_dev); |
5795eb44 | 4081 | |
1da177e4 LT |
4082 | kfree(sdkp); |
4083 | } | |
4084 | ||
cc5d2c8c | 4085 | static int sd_start_stop_device(struct scsi_disk *sdkp, int start) |
c3c94c5a TH |
4086 | { |
4087 | unsigned char cmd[6] = { START_STOP }; /* START_VALID */ | |
785538bf | 4088 | struct scsi_sense_hdr sshdr; |
a8598aef BVA |
4089 | struct scsi_failure failure_defs[] = { |
4090 | { | |
4091 | /* Power on, reset, or bus device reset occurred */ | |
4092 | .sense = UNIT_ATTENTION, | |
4093 | .asc = 0x29, | |
4094 | .ascq = 0, | |
4095 | .result = SAM_STAT_CHECK_CONDITION, | |
4096 | }, | |
4097 | { | |
4098 | /* Power on occurred */ | |
4099 | .sense = UNIT_ATTENTION, | |
4100 | .asc = 0x29, | |
4101 | .ascq = 1, | |
4102 | .result = SAM_STAT_CHECK_CONDITION, | |
4103 | }, | |
4104 | { | |
4105 | /* SCSI bus reset */ | |
4106 | .sense = UNIT_ATTENTION, | |
4107 | .asc = 0x29, | |
4108 | .ascq = 2, | |
4109 | .result = SAM_STAT_CHECK_CONDITION, | |
4110 | }, | |
4111 | {} | |
4112 | }; | |
4113 | struct scsi_failures failures = { | |
4114 | .total_allowed = 3, | |
4115 | .failure_definitions = failure_defs, | |
4116 | }; | |
af16cd63 MC |
4117 | const struct scsi_exec_args exec_args = { |
4118 | .sshdr = &sshdr, | |
4119 | .req_flags = BLK_MQ_REQ_PM, | |
a8598aef | 4120 | .failures = &failures, |
af16cd63 | 4121 | }; |
cc5d2c8c | 4122 | struct scsi_device *sdp = sdkp->device; |
785538bf | 4123 | int res; |
c3c94c5a TH |
4124 | |
4125 | if (start) | |
4126 | cmd[4] |= 1; /* START */ | |
4127 | ||
d2886ea3 SR |
4128 | if (sdp->start_stop_pwr_cond) |
4129 | cmd[4] |= start ? 1 << 4 : 3 << 4; /* Active or Standby */ | |
4130 | ||
c3c94c5a TH |
4131 | if (!scsi_device_online(sdp)) |
4132 | return -ENODEV; | |
4133 | ||
af16cd63 MC |
4134 | res = scsi_execute_cmd(sdp, cmd, REQ_OP_DRV_IN, NULL, 0, SD_TIMEOUT, |
4135 | sdkp->max_retries, &exec_args); | |
785538bf BVA |
4136 | if (res) { |
4137 | sd_print_result(sdkp, "Start/Stop Unit failed", res); | |
4138 | if (res > 0 && scsi_sense_valid(&sshdr)) { | |
4139 | sd_print_sense_hdr(sdkp, &sshdr); | |
4140 | /* 0x3a is medium not present */ | |
4141 | if (sshdr.asc == 0x3a) | |
4142 | res = 0; | |
4143 | } | |
4144 | } | |
c3c94c5a | 4145 | |
785538bf BVA |
4146 | /* SCSI error codes must not go to the generic layer */ |
4147 | if (res) | |
4148 | return -EIO; | |
4149 | ||
4150 | return 0; | |
c3c94c5a TH |
4151 | } |
4152 | ||
1da177e4 LT |
4153 | /* |
4154 | * Send a SYNCHRONIZE CACHE instruction down to the device through | |
4155 | * the normal SCSI command structure. Wait for the command to | |
4156 | * complete. | |
4157 | */ | |
4158 | static void sd_shutdown(struct device *dev) | |
4159 | { | |
3d9a1f53 | 4160 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
1da177e4 LT |
4161 | |
4162 | if (!sdkp) | |
4163 | return; /* this can happen */ | |
4164 | ||
54f57588 | 4165 | if (pm_runtime_suspended(dev)) |
3d9a1f53 | 4166 | return; |
54f57588 | 4167 | |
95897910 | 4168 | if (sdkp->WCE && sdkp->media_present) { |
e73aec82 | 4169 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
3b834863 | 4170 | sd_sync_cache(sdkp); |
39b7f1e2 | 4171 | } |
c3c94c5a | 4172 | |
24eca2dc DLM |
4173 | if ((system_state != SYSTEM_RESTART && |
4174 | sdkp->device->manage_system_start_stop) || | |
4175 | (system_state == SYSTEM_POWER_OFF && | |
4176 | sdkp->device->manage_shutdown)) { | |
cc5d2c8c JB |
4177 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); |
4178 | sd_start_stop_device(sdkp, 0); | |
c3c94c5a | 4179 | } |
39b7f1e2 | 4180 | } |
1da177e4 | 4181 | |
3cc2ffe5 DLM |
4182 | static inline bool sd_do_start_stop(struct scsi_device *sdev, bool runtime) |
4183 | { | |
4184 | return (sdev->manage_system_start_stop && !runtime) || | |
4185 | (sdev->manage_runtime_start_stop && runtime); | |
4186 | } | |
4187 | ||
4188 | static int sd_suspend_common(struct device *dev, bool runtime) | |
c3c94c5a | 4189 | { |
3d9a1f53 | 4190 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
09ff92fe | 4191 | int ret = 0; |
c3c94c5a | 4192 | |
13b43891 AS |
4193 | if (!sdkp) /* E.g.: runtime suspend following sd_remove() */ |
4194 | return 0; | |
c3c94c5a | 4195 | |
95897910 | 4196 | if (sdkp->WCE && sdkp->media_present) { |
af4edb1d AH |
4197 | if (!sdkp->device->silence_suspend) |
4198 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); | |
3b834863 MC |
4199 | ret = sd_sync_cache(sdkp); |
4200 | /* ignore OFFLINE device */ | |
4201 | if (ret == -ENODEV) | |
4202 | return 0; | |
4fa83244 | 4203 | |
3b834863 MC |
4204 | if (ret) |
4205 | return ret; | |
c3c94c5a TH |
4206 | } |
4207 | ||
3cc2ffe5 | 4208 | if (sd_do_start_stop(sdkp->device, runtime)) { |
af4edb1d AH |
4209 | if (!sdkp->device->silence_suspend) |
4210 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); | |
95897910 | 4211 | /* an error is not worth aborting a system sleep */ |
cc5d2c8c | 4212 | ret = sd_start_stop_device(sdkp, 0); |
3cc2ffe5 | 4213 | if (!runtime) |
95897910 | 4214 | ret = 0; |
c3c94c5a TH |
4215 | } |
4216 | ||
99398d20 DLM |
4217 | if (!ret) |
4218 | sdkp->suspended = true; | |
4219 | ||
09ff92fe | 4220 | return ret; |
c3c94c5a TH |
4221 | } |
4222 | ||
95897910 ON |
4223 | static int sd_suspend_system(struct device *dev) |
4224 | { | |
9131bff6 BVA |
4225 | if (pm_runtime_suspended(dev)) |
4226 | return 0; | |
4227 | ||
3cc2ffe5 | 4228 | return sd_suspend_common(dev, false); |
95897910 ON |
4229 | } |
4230 | ||
4231 | static int sd_suspend_runtime(struct device *dev) | |
4232 | { | |
3cc2ffe5 | 4233 | return sd_suspend_common(dev, true); |
95897910 ON |
4234 | } |
4235 | ||
0c76106c DLM |
4236 | static int sd_resume(struct device *dev) |
4237 | { | |
4238 | struct scsi_disk *sdkp = dev_get_drvdata(dev); | |
4239 | ||
da3e19ef JH |
4240 | sd_printk(KERN_NOTICE, sdkp, "Starting disk\n"); |
4241 | ||
0c76106c DLM |
4242 | if (opal_unlock_from_suspend(sdkp->opal_dev)) { |
4243 | sd_printk(KERN_NOTICE, sdkp, "OPAL unlock failed\n"); | |
4244 | return -EIO; | |
4245 | } | |
4246 | ||
4247 | return 0; | |
4248 | } | |
4249 | ||
4250 | static int sd_resume_common(struct device *dev, bool runtime) | |
c3c94c5a | 4251 | { |
3d9a1f53 | 4252 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
c4367ac8 | 4253 | int ret; |
c3c94c5a | 4254 | |
13b43891 AS |
4255 | if (!sdkp) /* E.g.: runtime resume at the start of sd_probe() */ |
4256 | return 0; | |
4257 | ||
99398d20 DLM |
4258 | if (!sd_do_start_stop(sdkp->device, runtime)) { |
4259 | sdkp->suspended = false; | |
3d9a1f53 | 4260 | return 0; |
99398d20 | 4261 | } |
c3c94c5a | 4262 | |
da3e19ef | 4263 | sd_printk(KERN_NOTICE, sdkp, "Starting disk\n"); |
c4367ac8 | 4264 | ret = sd_start_stop_device(sdkp, 1); |
99398d20 | 4265 | if (!ret) { |
0c76106c | 4266 | sd_resume(dev); |
99398d20 DLM |
4267 | sdkp->suspended = false; |
4268 | } | |
4269 | ||
d80210f2 | 4270 | return ret; |
c3c94c5a TH |
4271 | } |
4272 | ||
1c957532 BVA |
4273 | static int sd_resume_system(struct device *dev) |
4274 | { | |
b09d7f8f DLM |
4275 | if (pm_runtime_suspended(dev)) { |
4276 | struct scsi_disk *sdkp = dev_get_drvdata(dev); | |
4277 | struct scsi_device *sdp = sdkp ? sdkp->device : NULL; | |
4278 | ||
4279 | if (sdp && sdp->force_runtime_start_on_system_start) | |
4280 | pm_request_resume(dev); | |
4281 | ||
9131bff6 | 4282 | return 0; |
b09d7f8f | 4283 | } |
9131bff6 | 4284 | |
0c76106c | 4285 | return sd_resume_common(dev, false); |
1c957532 BVA |
4286 | } |
4287 | ||
ed4246d3 MK |
4288 | static int sd_resume_runtime(struct device *dev) |
4289 | { | |
4290 | struct scsi_disk *sdkp = dev_get_drvdata(dev); | |
85374b63 MC |
4291 | struct scsi_device *sdp; |
4292 | ||
4293 | if (!sdkp) /* E.g.: runtime resume at the start of sd_probe() */ | |
4294 | return 0; | |
4295 | ||
4296 | sdp = sdkp->device; | |
ed4246d3 MK |
4297 | |
4298 | if (sdp->ignore_media_change) { | |
4299 | /* clear the device's sense data */ | |
4300 | static const u8 cmd[10] = { REQUEST_SENSE }; | |
af16cd63 MC |
4301 | const struct scsi_exec_args exec_args = { |
4302 | .req_flags = BLK_MQ_REQ_PM, | |
4303 | }; | |
ed4246d3 | 4304 | |
af16cd63 MC |
4305 | if (scsi_execute_cmd(sdp, cmd, REQ_OP_DRV_IN, NULL, 0, |
4306 | sdp->request_queue->rq_timeout, 1, | |
4307 | &exec_args)) | |
ed4246d3 MK |
4308 | sd_printk(KERN_NOTICE, sdkp, |
4309 | "Failed to clear sense data\n"); | |
4310 | } | |
4311 | ||
0c76106c | 4312 | return sd_resume_common(dev, true); |
ed4246d3 MK |
4313 | } |
4314 | ||
efcf965a BVA |
4315 | static const struct dev_pm_ops sd_pm_ops = { |
4316 | .suspend = sd_suspend_system, | |
4317 | .resume = sd_resume_system, | |
4318 | .poweroff = sd_suspend_system, | |
4319 | .restore = sd_resume_system, | |
4320 | .runtime_suspend = sd_suspend_runtime, | |
4321 | .runtime_resume = sd_resume_runtime, | |
4322 | }; | |
4323 | ||
4324 | static struct scsi_driver sd_template = { | |
4325 | .gendrv = { | |
4326 | .name = "sd", | |
efcf965a BVA |
4327 | .probe = sd_probe, |
4328 | .probe_type = PROBE_PREFER_ASYNCHRONOUS, | |
4329 | .remove = sd_remove, | |
4330 | .shutdown = sd_shutdown, | |
4331 | .pm = &sd_pm_ops, | |
4332 | }, | |
4333 | .rescan = sd_rescan, | |
0c76106c | 4334 | .resume = sd_resume, |
efcf965a BVA |
4335 | .init_command = sd_init_command, |
4336 | .uninit_command = sd_uninit_command, | |
4337 | .done = sd_done, | |
4338 | .eh_action = sd_eh_action, | |
4339 | .eh_reset = sd_eh_reset, | |
4340 | }; | |
4341 | ||
1da177e4 LT |
4342 | /** |
4343 | * init_sd - entry point for this driver (both when built in or when | |
4344 | * a module). | |
4345 | * | |
4346 | * Note: this function registers this driver with the scsi mid-level. | |
4347 | **/ | |
4348 | static int __init init_sd(void) | |
4349 | { | |
5e4009ba | 4350 | int majors = 0, i, err; |
1da177e4 LT |
4351 | |
4352 | SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n")); | |
4353 | ||
0761df9c | 4354 | for (i = 0; i < SD_MAJORS; i++) { |
996e509b | 4355 | if (__register_blkdev(sd_major(i), "sd", sd_default_probe)) |
0761df9c HR |
4356 | continue; |
4357 | majors++; | |
0761df9c | 4358 | } |
1da177e4 LT |
4359 | |
4360 | if (!majors) | |
4361 | return -ENODEV; | |
4362 | ||
5e4009ba JG |
4363 | err = class_register(&sd_disk_class); |
4364 | if (err) | |
4365 | goto err_out; | |
6bdaa1f1 | 4366 | |
61cce6f6 JA |
4367 | sd_page_pool = mempool_create_page_pool(SD_MEMPOOL_SIZE, 0); |
4368 | if (!sd_page_pool) { | |
4369 | printk(KERN_ERR "sd: can't init discard page pool\n"); | |
4370 | err = -ENOMEM; | |
2b379516 | 4371 | goto err_out_class; |
61cce6f6 JA |
4372 | } |
4373 | ||
afd5e34b JD |
4374 | err = scsi_register_driver(&sd_template.gendrv); |
4375 | if (err) | |
4376 | goto err_out_driver; | |
4377 | ||
5e4009ba JG |
4378 | return 0; |
4379 | ||
afd5e34b | 4380 | err_out_driver: |
61cce6f6 | 4381 | mempool_destroy(sd_page_pool); |
5e4009ba JG |
4382 | err_out_class: |
4383 | class_unregister(&sd_disk_class); | |
4384 | err_out: | |
4385 | for (i = 0; i < SD_MAJORS; i++) | |
4386 | unregister_blkdev(sd_major(i), "sd"); | |
4387 | return err; | |
1da177e4 LT |
4388 | } |
4389 | ||
4390 | /** | |
4391 | * exit_sd - exit point for this driver (when it is a module). | |
4392 | * | |
4393 | * Note: this function unregisters this driver from the scsi mid-level. | |
4394 | **/ | |
4395 | static void __exit exit_sd(void) | |
4396 | { | |
4397 | int i; | |
4398 | ||
4399 | SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n")); | |
4400 | ||
afd5e34b | 4401 | scsi_unregister_driver(&sd_template.gendrv); |
61cce6f6 | 4402 | mempool_destroy(sd_page_pool); |
4e7392ec | 4403 | |
5e4009ba JG |
4404 | class_unregister(&sd_disk_class); |
4405 | ||
996e509b | 4406 | for (i = 0; i < SD_MAJORS; i++) |
1da177e4 LT |
4407 | unregister_blkdev(sd_major(i), "sd"); |
4408 | } | |
4409 | ||
1da177e4 LT |
4410 | module_init(init_sd); |
4411 | module_exit(exit_sd); | |
e73aec82 | 4412 | |
a35989a0 | 4413 | void sd_print_sense_hdr(struct scsi_disk *sdkp, struct scsi_sense_hdr *sshdr) |
e73aec82 | 4414 | { |
21045519 HR |
4415 | scsi_print_sense_hdr(sdkp->device, |
4416 | sdkp->disk ? sdkp->disk->disk_name : NULL, sshdr); | |
e73aec82 MP |
4417 | } |
4418 | ||
a35989a0 | 4419 | void sd_print_result(const struct scsi_disk *sdkp, const char *msg, int result) |
e73aec82 | 4420 | { |
ef61329d | 4421 | const char *hb_string = scsi_hostbyte_string(result); |
ef61329d | 4422 | |
54c29086 | 4423 | if (hb_string) |
ef61329d HR |
4424 | sd_printk(KERN_INFO, sdkp, |
4425 | "%s: Result: hostbyte=%s driverbyte=%s\n", msg, | |
4426 | hb_string ? hb_string : "invalid", | |
54c29086 | 4427 | "DRIVER_OK"); |
ef61329d HR |
4428 | else |
4429 | sd_printk(KERN_INFO, sdkp, | |
54c29086 HR |
4430 | "%s: Result: hostbyte=0x%02x driverbyte=%s\n", |
4431 | msg, host_byte(result), "DRIVER_OK"); | |
e73aec82 | 4432 | } |