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09c434b8 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1da177e4 LT |
2 | /* |
3 | * sd.c Copyright (C) 1992 Drew Eckhardt | |
4 | * Copyright (C) 1993, 1994, 1995, 1999 Eric Youngdale | |
5 | * | |
6 | * Linux scsi disk driver | |
7 | * Initial versions: Drew Eckhardt | |
8 | * Subsequent revisions: Eric Youngdale | |
9 | * Modification history: | |
10 | * - Drew Eckhardt <drew@colorado.edu> original | |
11 | * - Eric Youngdale <eric@andante.org> add scatter-gather, multiple | |
12 | * outstanding request, and other enhancements. | |
13 | * Support loadable low-level scsi drivers. | |
14 | * - Jirka Hanika <geo@ff.cuni.cz> support more scsi disks using | |
15 | * eight major numbers. | |
16 | * - Richard Gooch <rgooch@atnf.csiro.au> support devfs. | |
17 | * - Torben Mathiasen <tmm@image.dk> Resource allocation fixes in | |
18 | * sd_init and cleanups. | |
19 | * - Alex Davis <letmein@erols.com> Fix problem where partition info | |
20 | * not being read in sd_open. Fix problem where removable media | |
21 | * could be ejected after sd_open. | |
22 | * - Douglas Gilbert <dgilbert@interlog.com> cleanup for lk 2.5.x | |
23 | * - Badari Pulavarty <pbadari@us.ibm.com>, Matthew Wilcox | |
24 | * <willy@debian.org>, Kurt Garloff <garloff@suse.de>: | |
25 | * Support 32k/1M disks. | |
26 | * | |
27 | * Logging policy (needs CONFIG_SCSI_LOGGING defined): | |
28 | * - setting up transfer: SCSI_LOG_HLQUEUE levels 1 and 2 | |
29 | * - end of transfer (bh + scsi_lib): SCSI_LOG_HLCOMPLETE level 1 | |
30 | * - entering sd_ioctl: SCSI_LOG_IOCTL level 1 | |
31 | * - entering other commands: SCSI_LOG_HLQUEUE level 3 | |
32 | * Note: when the logging level is set by the user, it must be greater | |
33 | * than the level indicated above to trigger output. | |
34 | */ | |
35 | ||
1da177e4 LT |
36 | #include <linux/module.h> |
37 | #include <linux/fs.h> | |
38 | #include <linux/kernel.h> | |
1da177e4 LT |
39 | #include <linux/mm.h> |
40 | #include <linux/bio.h> | |
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> |
b81e0c23 | 50 | #include <linux/major.h> |
0b950672 | 51 | #include <linux/mutex.h> |
7404ad3b | 52 | #include <linux/string_helpers.h> |
5a0e3ad6 | 53 | #include <linux/slab.h> |
d80210f2 | 54 | #include <linux/sed-opal.h> |
54f57588 | 55 | #include <linux/pm_runtime.h> |
924d55b0 | 56 | #include <linux/pr.h> |
8475c811 | 57 | #include <linux/t10-pi.h> |
7c0f6ba6 | 58 | #include <linux/uaccess.h> |
8f76d151 | 59 | #include <asm/unaligned.h> |
1da177e4 LT |
60 | |
61 | #include <scsi/scsi.h> | |
62 | #include <scsi/scsi_cmnd.h> | |
63 | #include <scsi/scsi_dbg.h> | |
64 | #include <scsi/scsi_device.h> | |
65 | #include <scsi/scsi_driver.h> | |
66 | #include <scsi/scsi_eh.h> | |
67 | #include <scsi/scsi_host.h> | |
68 | #include <scsi/scsi_ioctl.h> | |
1da177e4 | 69 | #include <scsi/scsicam.h> |
0730b163 | 70 | #include <scsi/scsi_common.h> |
1da177e4 | 71 | |
aa91696e | 72 | #include "sd.h" |
a7a20d10 | 73 | #include "scsi_priv.h" |
1da177e4 LT |
74 | #include "scsi_logging.h" |
75 | ||
f018fa55 RH |
76 | MODULE_AUTHOR("Eric Youngdale"); |
77 | MODULE_DESCRIPTION("SCSI disk (sd) driver"); | |
78 | MODULE_LICENSE("GPL"); | |
79 | ||
80 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK0_MAJOR); | |
81 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK1_MAJOR); | |
82 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK2_MAJOR); | |
83 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK3_MAJOR); | |
84 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK4_MAJOR); | |
85 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK5_MAJOR); | |
86 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK6_MAJOR); | |
87 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK7_MAJOR); | |
88 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK8_MAJOR); | |
89 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK9_MAJOR); | |
90 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK10_MAJOR); | |
91 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK11_MAJOR); | |
92 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK12_MAJOR); | |
93 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK13_MAJOR); | |
94 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK14_MAJOR); | |
95 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK15_MAJOR); | |
d7b8bcb0 MT |
96 | MODULE_ALIAS_SCSI_DEVICE(TYPE_DISK); |
97 | MODULE_ALIAS_SCSI_DEVICE(TYPE_MOD); | |
98 | MODULE_ALIAS_SCSI_DEVICE(TYPE_RBC); | |
89d94756 | 99 | MODULE_ALIAS_SCSI_DEVICE(TYPE_ZBC); |
f018fa55 | 100 | |
f615b48c | 101 | #define SD_MINORS 16 |
870d6656 | 102 | |
c98a0eb0 | 103 | static void sd_config_discard(struct scsi_disk *, unsigned int); |
5db44863 | 104 | static void sd_config_write_same(struct scsi_disk *); |
7b3d9545 | 105 | static int sd_revalidate_disk(struct gendisk *); |
72ec24bd | 106 | static void sd_unlock_native_capacity(struct gendisk *disk); |
7b3d9545 LT |
107 | static int sd_probe(struct device *); |
108 | static int sd_remove(struct device *); | |
109 | static void sd_shutdown(struct device *); | |
95897910 ON |
110 | static int sd_suspend_system(struct device *); |
111 | static int sd_suspend_runtime(struct device *); | |
1c957532 | 112 | static int sd_resume_system(struct device *); |
ed4246d3 | 113 | static int sd_resume_runtime(struct device *); |
7b3d9545 | 114 | static void sd_rescan(struct device *); |
159b2cbf | 115 | static blk_status_t sd_init_command(struct scsi_cmnd *SCpnt); |
a1b73fc1 | 116 | static void sd_uninit_command(struct scsi_cmnd *SCpnt); |
7b3d9545 | 117 | static int sd_done(struct scsi_cmnd *); |
7a38dc0b | 118 | static void sd_eh_reset(struct scsi_cmnd *); |
2451079b | 119 | static int sd_eh_action(struct scsi_cmnd *, int); |
7b3d9545 | 120 | static void sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer); |
ee959b00 | 121 | static void scsi_disk_release(struct device *cdev); |
7b3d9545 | 122 | |
f27bac27 | 123 | static DEFINE_IDA(sd_index_ida); |
1da177e4 | 124 | |
61cce6f6 | 125 | static mempool_t *sd_page_pool; |
9c2b9dba | 126 | static struct lock_class_key sd_bio_compl_lkclass; |
4e7392ec | 127 | |
6bdaa1f1 JB |
128 | static const char *sd_cache_types[] = { |
129 | "write through", "none", "write back", | |
130 | "write back, no read (daft)" | |
131 | }; | |
132 | ||
cb2fb68d VC |
133 | static void sd_set_flush_flag(struct scsi_disk *sdkp) |
134 | { | |
eb310e23 | 135 | bool wc = false, fua = false; |
cb2fb68d VC |
136 | |
137 | if (sdkp->WCE) { | |
eb310e23 | 138 | wc = true; |
cb2fb68d | 139 | if (sdkp->DPOFUA) |
eb310e23 | 140 | fua = true; |
cb2fb68d VC |
141 | } |
142 | ||
eb310e23 | 143 | blk_queue_write_cache(sdkp->disk->queue, wc, fua); |
cb2fb68d VC |
144 | } |
145 | ||
ee959b00 | 146 | static ssize_t |
e1ea2351 GKH |
147 | cache_type_store(struct device *dev, struct device_attribute *attr, |
148 | const char *buf, size_t count) | |
6bdaa1f1 | 149 | { |
4c11712a | 150 | int ct, rcd, wce, sp; |
ee959b00 | 151 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
152 | struct scsi_device *sdp = sdkp->device; |
153 | char buffer[64]; | |
154 | char *buffer_data; | |
155 | struct scsi_mode_data data; | |
156 | struct scsi_sense_hdr sshdr; | |
2ee3e26c | 157 | static const char temp[] = "temporary "; |
6bdaa1f1 JB |
158 | int len; |
159 | ||
89d94756 | 160 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) |
6bdaa1f1 JB |
161 | /* no cache control on RBC devices; theoretically they |
162 | * can do it, but there's probably so many exceptions | |
163 | * it's not worth the risk */ | |
164 | return -EINVAL; | |
165 | ||
39c60a09 JB |
166 | if (strncmp(buf, temp, sizeof(temp) - 1) == 0) { |
167 | buf += sizeof(temp) - 1; | |
168 | sdkp->cache_override = 1; | |
169 | } else { | |
170 | sdkp->cache_override = 0; | |
171 | } | |
172 | ||
4c11712a | 173 | ct = sysfs_match_string(sd_cache_types, buf); |
6bdaa1f1 JB |
174 | if (ct < 0) |
175 | return -EINVAL; | |
4c11712a | 176 | |
6bdaa1f1 | 177 | rcd = ct & 0x01 ? 1 : 0; |
2eefd57b | 178 | wce = (ct & 0x02) && !sdkp->write_prot ? 1 : 0; |
39c60a09 JB |
179 | |
180 | if (sdkp->cache_override) { | |
181 | sdkp->WCE = wce; | |
182 | sdkp->RCD = rcd; | |
cb2fb68d | 183 | sd_set_flush_flag(sdkp); |
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 | ||
81d3f500 | 205 | if (scsi_mode_select(sdp, 1, sp, buffer_data, len, SD_TIMEOUT, |
0610959f | 206 | sdkp->max_retries, &data, &sshdr)) { |
6bdaa1f1 | 207 | if (scsi_sense_valid(&sshdr)) |
e73aec82 | 208 | sd_print_sense_hdr(sdkp, &sshdr); |
6bdaa1f1 JB |
209 | return -EINVAL; |
210 | } | |
033a1b98 | 211 | sd_revalidate_disk(sdkp->disk); |
6bdaa1f1 JB |
212 | return count; |
213 | } | |
214 | ||
ee959b00 | 215 | static ssize_t |
e1ea2351 GKH |
216 | manage_start_stop_show(struct device *dev, struct device_attribute *attr, |
217 | char *buf) | |
218 | { | |
219 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
220 | struct scsi_device *sdp = sdkp->device; | |
221 | ||
4c11712a | 222 | return sprintf(buf, "%u\n", sdp->manage_start_stop); |
e1ea2351 GKH |
223 | } |
224 | ||
225 | static ssize_t | |
226 | manage_start_stop_store(struct device *dev, struct device_attribute *attr, | |
227 | const char *buf, size_t count) | |
c3c94c5a | 228 | { |
ee959b00 | 229 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
c3c94c5a | 230 | struct scsi_device *sdp = sdkp->device; |
623401ee | 231 | bool v; |
c3c94c5a TH |
232 | |
233 | if (!capable(CAP_SYS_ADMIN)) | |
234 | return -EACCES; | |
235 | ||
623401ee | 236 | if (kstrtobool(buf, &v)) |
237 | return -EINVAL; | |
238 | ||
239 | sdp->manage_start_stop = v; | |
c3c94c5a TH |
240 | |
241 | return count; | |
242 | } | |
e1ea2351 | 243 | static DEVICE_ATTR_RW(manage_start_stop); |
c3c94c5a | 244 | |
ee959b00 | 245 | static ssize_t |
e1ea2351 GKH |
246 | allow_restart_show(struct device *dev, struct device_attribute *attr, char *buf) |
247 | { | |
248 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
249 | ||
4c11712a | 250 | return sprintf(buf, "%u\n", sdkp->device->allow_restart); |
e1ea2351 GKH |
251 | } |
252 | ||
253 | static ssize_t | |
254 | allow_restart_store(struct device *dev, struct device_attribute *attr, | |
255 | const char *buf, size_t count) | |
a144c5ae | 256 | { |
658e9a6d | 257 | bool v; |
ee959b00 | 258 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
a144c5ae BK |
259 | struct scsi_device *sdp = sdkp->device; |
260 | ||
261 | if (!capable(CAP_SYS_ADMIN)) | |
262 | return -EACCES; | |
263 | ||
89d94756 | 264 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) |
a144c5ae BK |
265 | return -EINVAL; |
266 | ||
658e9a6d | 267 | if (kstrtobool(buf, &v)) |
268 | return -EINVAL; | |
269 | ||
270 | sdp->allow_restart = v; | |
a144c5ae BK |
271 | |
272 | return count; | |
273 | } | |
e1ea2351 | 274 | static DEVICE_ATTR_RW(allow_restart); |
a144c5ae | 275 | |
ee959b00 | 276 | static ssize_t |
e1ea2351 | 277 | cache_type_show(struct device *dev, struct device_attribute *attr, char *buf) |
6bdaa1f1 | 278 | { |
ee959b00 | 279 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
280 | int ct = sdkp->RCD + 2*sdkp->WCE; |
281 | ||
4c11712a | 282 | return sprintf(buf, "%s\n", sd_cache_types[ct]); |
6bdaa1f1 | 283 | } |
e1ea2351 | 284 | static DEVICE_ATTR_RW(cache_type); |
6bdaa1f1 | 285 | |
ee959b00 | 286 | static ssize_t |
e1ea2351 | 287 | FUA_show(struct device *dev, struct device_attribute *attr, char *buf) |
6bdaa1f1 | 288 | { |
ee959b00 | 289 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 | 290 | |
4c11712a | 291 | return sprintf(buf, "%u\n", sdkp->DPOFUA); |
6bdaa1f1 | 292 | } |
e1ea2351 | 293 | static DEVICE_ATTR_RO(FUA); |
6bdaa1f1 | 294 | |
ee959b00 | 295 | static ssize_t |
e1ea2351 GKH |
296 | protection_type_show(struct device *dev, struct device_attribute *attr, |
297 | char *buf) | |
e0597d70 MP |
298 | { |
299 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
300 | ||
4c11712a | 301 | return sprintf(buf, "%u\n", sdkp->protection_type); |
e0597d70 MP |
302 | } |
303 | ||
8172499a | 304 | static ssize_t |
e1ea2351 GKH |
305 | protection_type_store(struct device *dev, struct device_attribute *attr, |
306 | const char *buf, size_t count) | |
8172499a MP |
307 | { |
308 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
309 | unsigned int val; | |
310 | int err; | |
311 | ||
312 | if (!capable(CAP_SYS_ADMIN)) | |
313 | return -EACCES; | |
314 | ||
315 | err = kstrtouint(buf, 10, &val); | |
316 | ||
317 | if (err) | |
318 | return err; | |
319 | ||
830cc351 | 320 | if (val <= T10_PI_TYPE3_PROTECTION) |
8172499a MP |
321 | sdkp->protection_type = val; |
322 | ||
323 | return count; | |
324 | } | |
e1ea2351 | 325 | static DEVICE_ATTR_RW(protection_type); |
8172499a | 326 | |
518fa8e3 | 327 | static ssize_t |
e1ea2351 GKH |
328 | protection_mode_show(struct device *dev, struct device_attribute *attr, |
329 | char *buf) | |
518fa8e3 MP |
330 | { |
331 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
332 | struct scsi_device *sdp = sdkp->device; | |
333 | unsigned int dif, dix; | |
334 | ||
335 | dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type); | |
336 | dix = scsi_host_dix_capable(sdp->host, sdkp->protection_type); | |
337 | ||
8475c811 | 338 | if (!dix && scsi_host_dix_capable(sdp->host, T10_PI_TYPE0_PROTECTION)) { |
518fa8e3 MP |
339 | dif = 0; |
340 | dix = 1; | |
341 | } | |
342 | ||
343 | if (!dif && !dix) | |
4c11712a | 344 | return sprintf(buf, "none\n"); |
518fa8e3 | 345 | |
4c11712a | 346 | return sprintf(buf, "%s%u\n", dix ? "dix" : "dif", dif); |
518fa8e3 | 347 | } |
e1ea2351 | 348 | static DEVICE_ATTR_RO(protection_mode); |
518fa8e3 | 349 | |
e0597d70 | 350 | static ssize_t |
e1ea2351 | 351 | app_tag_own_show(struct device *dev, struct device_attribute *attr, char *buf) |
e0597d70 MP |
352 | { |
353 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
354 | ||
4c11712a | 355 | return sprintf(buf, "%u\n", sdkp->ATO); |
e0597d70 | 356 | } |
e1ea2351 | 357 | static DEVICE_ATTR_RO(app_tag_own); |
e0597d70 | 358 | |
e339c1a7 | 359 | static ssize_t |
e1ea2351 GKH |
360 | thin_provisioning_show(struct device *dev, struct device_attribute *attr, |
361 | char *buf) | |
e339c1a7 MP |
362 | { |
363 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
364 | ||
4c11712a | 365 | return sprintf(buf, "%u\n", sdkp->lbpme); |
c98a0eb0 | 366 | } |
e1ea2351 | 367 | static DEVICE_ATTR_RO(thin_provisioning); |
c98a0eb0 | 368 | |
4c11712a | 369 | /* sysfs_match_string() requires dense arrays */ |
c98a0eb0 MP |
370 | static const char *lbp_mode[] = { |
371 | [SD_LBP_FULL] = "full", | |
372 | [SD_LBP_UNMAP] = "unmap", | |
373 | [SD_LBP_WS16] = "writesame_16", | |
374 | [SD_LBP_WS10] = "writesame_10", | |
375 | [SD_LBP_ZERO] = "writesame_zero", | |
376 | [SD_LBP_DISABLE] = "disabled", | |
377 | }; | |
378 | ||
379 | static ssize_t | |
e1ea2351 GKH |
380 | provisioning_mode_show(struct device *dev, struct device_attribute *attr, |
381 | char *buf) | |
c98a0eb0 MP |
382 | { |
383 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
384 | ||
4c11712a | 385 | return sprintf(buf, "%s\n", lbp_mode[sdkp->provisioning_mode]); |
c98a0eb0 MP |
386 | } |
387 | ||
388 | static ssize_t | |
e1ea2351 GKH |
389 | provisioning_mode_store(struct device *dev, struct device_attribute *attr, |
390 | const char *buf, size_t count) | |
c98a0eb0 MP |
391 | { |
392 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
393 | struct scsi_device *sdp = sdkp->device; | |
4c11712a | 394 | int mode; |
c98a0eb0 MP |
395 | |
396 | if (!capable(CAP_SYS_ADMIN)) | |
397 | return -EACCES; | |
398 | ||
89d94756 HR |
399 | if (sd_is_zoned(sdkp)) { |
400 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
401 | return count; | |
402 | } | |
403 | ||
c98a0eb0 MP |
404 | if (sdp->type != TYPE_DISK) |
405 | return -EINVAL; | |
406 | ||
4c11712a MP |
407 | mode = sysfs_match_string(lbp_mode, buf); |
408 | if (mode < 0) | |
c98a0eb0 MP |
409 | return -EINVAL; |
410 | ||
4c11712a MP |
411 | sd_config_discard(sdkp, mode); |
412 | ||
c98a0eb0 | 413 | return count; |
e339c1a7 | 414 | } |
e1ea2351 | 415 | static DEVICE_ATTR_RW(provisioning_mode); |
e339c1a7 | 416 | |
4c11712a | 417 | /* sysfs_match_string() requires dense arrays */ |
e6bd9312 MP |
418 | static const char *zeroing_mode[] = { |
419 | [SD_ZERO_WRITE] = "write", | |
420 | [SD_ZERO_WS] = "writesame", | |
421 | [SD_ZERO_WS16_UNMAP] = "writesame_16_unmap", | |
422 | [SD_ZERO_WS10_UNMAP] = "writesame_10_unmap", | |
423 | }; | |
424 | ||
425 | static ssize_t | |
426 | zeroing_mode_show(struct device *dev, struct device_attribute *attr, | |
427 | char *buf) | |
428 | { | |
429 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
430 | ||
4c11712a | 431 | return sprintf(buf, "%s\n", zeroing_mode[sdkp->zeroing_mode]); |
e6bd9312 MP |
432 | } |
433 | ||
434 | static ssize_t | |
435 | zeroing_mode_store(struct device *dev, struct device_attribute *attr, | |
436 | const char *buf, size_t count) | |
437 | { | |
438 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
4c11712a | 439 | int mode; |
e6bd9312 MP |
440 | |
441 | if (!capable(CAP_SYS_ADMIN)) | |
442 | return -EACCES; | |
443 | ||
4c11712a MP |
444 | mode = sysfs_match_string(zeroing_mode, buf); |
445 | if (mode < 0) | |
e6bd9312 MP |
446 | return -EINVAL; |
447 | ||
4c11712a MP |
448 | sdkp->zeroing_mode = mode; |
449 | ||
e6bd9312 MP |
450 | return count; |
451 | } | |
452 | static DEVICE_ATTR_RW(zeroing_mode); | |
453 | ||
18a4d0a2 | 454 | static ssize_t |
e1ea2351 GKH |
455 | max_medium_access_timeouts_show(struct device *dev, |
456 | struct device_attribute *attr, char *buf) | |
18a4d0a2 MP |
457 | { |
458 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
459 | ||
4c11712a | 460 | return sprintf(buf, "%u\n", sdkp->max_medium_access_timeouts); |
18a4d0a2 MP |
461 | } |
462 | ||
463 | static ssize_t | |
e1ea2351 GKH |
464 | max_medium_access_timeouts_store(struct device *dev, |
465 | struct device_attribute *attr, const char *buf, | |
466 | size_t count) | |
18a4d0a2 MP |
467 | { |
468 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
469 | int err; | |
470 | ||
471 | if (!capable(CAP_SYS_ADMIN)) | |
472 | return -EACCES; | |
473 | ||
474 | err = kstrtouint(buf, 10, &sdkp->max_medium_access_timeouts); | |
475 | ||
476 | return err ? err : count; | |
477 | } | |
e1ea2351 | 478 | static DEVICE_ATTR_RW(max_medium_access_timeouts); |
18a4d0a2 | 479 | |
5db44863 | 480 | static ssize_t |
e1ea2351 GKH |
481 | max_write_same_blocks_show(struct device *dev, struct device_attribute *attr, |
482 | char *buf) | |
5db44863 MP |
483 | { |
484 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
485 | ||
4c11712a | 486 | return sprintf(buf, "%u\n", sdkp->max_ws_blocks); |
5db44863 MP |
487 | } |
488 | ||
489 | static ssize_t | |
e1ea2351 GKH |
490 | max_write_same_blocks_store(struct device *dev, struct device_attribute *attr, |
491 | const char *buf, size_t count) | |
5db44863 MP |
492 | { |
493 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
494 | struct scsi_device *sdp = sdkp->device; | |
495 | unsigned long max; | |
496 | int err; | |
497 | ||
498 | if (!capable(CAP_SYS_ADMIN)) | |
499 | return -EACCES; | |
500 | ||
89d94756 | 501 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) |
5db44863 MP |
502 | return -EINVAL; |
503 | ||
504 | err = kstrtoul(buf, 10, &max); | |
505 | ||
506 | if (err) | |
507 | return err; | |
508 | ||
509 | if (max == 0) | |
510 | sdp->no_write_same = 1; | |
66c28f97 MP |
511 | else if (max <= SD_MAX_WS16_BLOCKS) { |
512 | sdp->no_write_same = 0; | |
5db44863 | 513 | sdkp->max_ws_blocks = max; |
66c28f97 | 514 | } |
5db44863 MP |
515 | |
516 | sd_config_write_same(sdkp); | |
517 | ||
518 | return count; | |
519 | } | |
e1ea2351 GKH |
520 | static DEVICE_ATTR_RW(max_write_same_blocks); |
521 | ||
c5f88522 DLM |
522 | static ssize_t |
523 | zoned_cap_show(struct device *dev, struct device_attribute *attr, char *buf) | |
524 | { | |
525 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
526 | ||
527 | if (sdkp->device->type == TYPE_ZBC) | |
528 | return sprintf(buf, "host-managed\n"); | |
529 | if (sdkp->zoned == 1) | |
530 | return sprintf(buf, "host-aware\n"); | |
531 | if (sdkp->zoned == 2) | |
532 | return sprintf(buf, "drive-managed\n"); | |
533 | return sprintf(buf, "none\n"); | |
534 | } | |
535 | static DEVICE_ATTR_RO(zoned_cap); | |
536 | ||
0610959f MC |
537 | static ssize_t |
538 | max_retries_store(struct device *dev, struct device_attribute *attr, | |
539 | const char *buf, size_t count) | |
540 | { | |
541 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
542 | struct scsi_device *sdev = sdkp->device; | |
543 | int retries, err; | |
544 | ||
545 | err = kstrtoint(buf, 10, &retries); | |
546 | if (err) | |
547 | return err; | |
548 | ||
549 | if (retries == SCSI_CMD_RETRIES_NO_LIMIT || retries <= SD_MAX_RETRIES) { | |
550 | sdkp->max_retries = retries; | |
551 | return count; | |
552 | } | |
553 | ||
554 | sdev_printk(KERN_ERR, sdev, "max_retries must be between -1 and %d\n", | |
555 | SD_MAX_RETRIES); | |
556 | return -EINVAL; | |
557 | } | |
558 | ||
559 | static ssize_t | |
560 | max_retries_show(struct device *dev, struct device_attribute *attr, | |
561 | char *buf) | |
562 | { | |
563 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
564 | ||
565 | return sprintf(buf, "%d\n", sdkp->max_retries); | |
566 | } | |
567 | ||
568 | static DEVICE_ATTR_RW(max_retries); | |
569 | ||
e1ea2351 GKH |
570 | static struct attribute *sd_disk_attrs[] = { |
571 | &dev_attr_cache_type.attr, | |
572 | &dev_attr_FUA.attr, | |
573 | &dev_attr_allow_restart.attr, | |
574 | &dev_attr_manage_start_stop.attr, | |
575 | &dev_attr_protection_type.attr, | |
576 | &dev_attr_protection_mode.attr, | |
577 | &dev_attr_app_tag_own.attr, | |
578 | &dev_attr_thin_provisioning.attr, | |
579 | &dev_attr_provisioning_mode.attr, | |
e6bd9312 | 580 | &dev_attr_zeroing_mode.attr, |
e1ea2351 GKH |
581 | &dev_attr_max_write_same_blocks.attr, |
582 | &dev_attr_max_medium_access_timeouts.attr, | |
c5f88522 | 583 | &dev_attr_zoned_cap.attr, |
0610959f | 584 | &dev_attr_max_retries.attr, |
e1ea2351 | 585 | NULL, |
6bdaa1f1 | 586 | }; |
e1ea2351 | 587 | ATTRIBUTE_GROUPS(sd_disk); |
6bdaa1f1 JB |
588 | |
589 | static struct class sd_disk_class = { | |
590 | .name = "scsi_disk", | |
ee959b00 | 591 | .dev_release = scsi_disk_release, |
e1ea2351 | 592 | .dev_groups = sd_disk_groups, |
6bdaa1f1 | 593 | }; |
1da177e4 | 594 | |
691e3d31 | 595 | static const struct dev_pm_ops sd_pm_ops = { |
95897910 | 596 | .suspend = sd_suspend_system, |
1c957532 | 597 | .resume = sd_resume_system, |
95897910 | 598 | .poweroff = sd_suspend_system, |
1c957532 | 599 | .restore = sd_resume_system, |
95897910 | 600 | .runtime_suspend = sd_suspend_runtime, |
ed4246d3 | 601 | .runtime_resume = sd_resume_runtime, |
691e3d31 AL |
602 | }; |
603 | ||
1da177e4 | 604 | static struct scsi_driver sd_template = { |
1da177e4 LT |
605 | .gendrv = { |
606 | .name = "sd", | |
3af6b352 | 607 | .owner = THIS_MODULE, |
1da177e4 | 608 | .probe = sd_probe, |
f049cf1a | 609 | .probe_type = PROBE_PREFER_ASYNCHRONOUS, |
1da177e4 LT |
610 | .remove = sd_remove, |
611 | .shutdown = sd_shutdown, | |
691e3d31 | 612 | .pm = &sd_pm_ops, |
1da177e4 LT |
613 | }, |
614 | .rescan = sd_rescan, | |
a1b73fc1 CH |
615 | .init_command = sd_init_command, |
616 | .uninit_command = sd_uninit_command, | |
7b3d9545 | 617 | .done = sd_done, |
18a4d0a2 | 618 | .eh_action = sd_eh_action, |
7a38dc0b | 619 | .eh_reset = sd_eh_reset, |
1da177e4 LT |
620 | }; |
621 | ||
0761df9c | 622 | /* |
996e509b CH |
623 | * Don't request a new module, as that could deadlock in multipath |
624 | * environment. | |
0761df9c | 625 | */ |
996e509b | 626 | static void sd_default_probe(dev_t devt) |
0761df9c | 627 | { |
0761df9c HR |
628 | } |
629 | ||
1da177e4 LT |
630 | /* |
631 | * Device no to disk mapping: | |
632 | * | |
633 | * major disc2 disc p1 | |
634 | * |............|.............|....|....| <- dev_t | |
635 | * 31 20 19 8 7 4 3 0 | |
636 | * | |
637 | * Inside a major, we have 16k disks, however mapped non- | |
638 | * contiguously. The first 16 disks are for major0, the next | |
639 | * ones with major1, ... Disk 256 is for major0 again, disk 272 | |
640 | * for major1, ... | |
641 | * As we stay compatible with our numbering scheme, we can reuse | |
642 | * the well-know SCSI majors 8, 65--71, 136--143. | |
643 | */ | |
644 | static int sd_major(int major_idx) | |
645 | { | |
646 | switch (major_idx) { | |
647 | case 0: | |
648 | return SCSI_DISK0_MAJOR; | |
649 | case 1 ... 7: | |
650 | return SCSI_DISK1_MAJOR + major_idx - 1; | |
651 | case 8 ... 15: | |
652 | return SCSI_DISK8_MAJOR + major_idx - 8; | |
653 | default: | |
654 | BUG(); | |
655 | return 0; /* shut up gcc */ | |
656 | } | |
657 | } | |
658 | ||
d80210f2 CH |
659 | #ifdef CONFIG_BLK_SED_OPAL |
660 | static int sd_sec_submit(void *data, u16 spsp, u8 secp, void *buffer, | |
661 | size_t len, bool send) | |
662 | { | |
0610959f MC |
663 | struct scsi_disk *sdkp = data; |
664 | struct scsi_device *sdev = sdkp->device; | |
d80210f2 | 665 | u8 cdb[12] = { 0, }; |
af16cd63 MC |
666 | const struct scsi_exec_args exec_args = { |
667 | .req_flags = BLK_MQ_REQ_PM, | |
668 | }; | |
d80210f2 CH |
669 | int ret; |
670 | ||
671 | cdb[0] = send ? SECURITY_PROTOCOL_OUT : SECURITY_PROTOCOL_IN; | |
672 | cdb[1] = secp; | |
673 | put_unaligned_be16(spsp, &cdb[2]); | |
674 | put_unaligned_be32(len, &cdb[6]); | |
675 | ||
af16cd63 MC |
676 | ret = scsi_execute_cmd(sdev, cdb, send ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN, |
677 | buffer, len, SD_TIMEOUT, sdkp->max_retries, | |
678 | &exec_args); | |
d80210f2 CH |
679 | return ret <= 0 ? ret : -EIO; |
680 | } | |
681 | #endif /* CONFIG_BLK_SED_OPAL */ | |
682 | ||
082c2cd2 JG |
683 | /* |
684 | * Look up the DIX operation based on whether the command is read or | |
685 | * write and whether dix and dif are enabled. | |
686 | */ | |
687 | static unsigned int sd_prot_op(bool write, bool dix, bool dif) | |
688 | { | |
689 | /* Lookup table: bit 2 (write), bit 1 (dix), bit 0 (dif) */ | |
690 | static const unsigned int ops[] = { /* wrt dix dif */ | |
691 | SCSI_PROT_NORMAL, /* 0 0 0 */ | |
692 | SCSI_PROT_READ_STRIP, /* 0 0 1 */ | |
693 | SCSI_PROT_READ_INSERT, /* 0 1 0 */ | |
694 | SCSI_PROT_READ_PASS, /* 0 1 1 */ | |
695 | SCSI_PROT_NORMAL, /* 1 0 0 */ | |
696 | SCSI_PROT_WRITE_INSERT, /* 1 0 1 */ | |
697 | SCSI_PROT_WRITE_STRIP, /* 1 1 0 */ | |
698 | SCSI_PROT_WRITE_PASS, /* 1 1 1 */ | |
699 | }; | |
700 | ||
701 | return ops[write << 2 | dix << 1 | dif]; | |
702 | } | |
703 | ||
704 | /* | |
705 | * Returns a mask of the protection flags that are valid for a given DIX | |
706 | * operation. | |
707 | */ | |
708 | static unsigned int sd_prot_flag_mask(unsigned int prot_op) | |
709 | { | |
710 | static const unsigned int flag_mask[] = { | |
711 | [SCSI_PROT_NORMAL] = 0, | |
712 | ||
713 | [SCSI_PROT_READ_STRIP] = SCSI_PROT_TRANSFER_PI | | |
714 | SCSI_PROT_GUARD_CHECK | | |
715 | SCSI_PROT_REF_CHECK | | |
716 | SCSI_PROT_REF_INCREMENT, | |
717 | ||
718 | [SCSI_PROT_READ_INSERT] = SCSI_PROT_REF_INCREMENT | | |
719 | SCSI_PROT_IP_CHECKSUM, | |
720 | ||
721 | [SCSI_PROT_READ_PASS] = SCSI_PROT_TRANSFER_PI | | |
722 | SCSI_PROT_GUARD_CHECK | | |
723 | SCSI_PROT_REF_CHECK | | |
724 | SCSI_PROT_REF_INCREMENT | | |
725 | SCSI_PROT_IP_CHECKSUM, | |
726 | ||
727 | [SCSI_PROT_WRITE_INSERT] = SCSI_PROT_TRANSFER_PI | | |
728 | SCSI_PROT_REF_INCREMENT, | |
729 | ||
730 | [SCSI_PROT_WRITE_STRIP] = SCSI_PROT_GUARD_CHECK | | |
731 | SCSI_PROT_REF_CHECK | | |
732 | SCSI_PROT_REF_INCREMENT | | |
733 | SCSI_PROT_IP_CHECKSUM, | |
734 | ||
735 | [SCSI_PROT_WRITE_PASS] = SCSI_PROT_TRANSFER_PI | | |
736 | SCSI_PROT_GUARD_CHECK | | |
737 | SCSI_PROT_REF_CHECK | | |
738 | SCSI_PROT_REF_INCREMENT | | |
739 | SCSI_PROT_IP_CHECKSUM, | |
740 | }; | |
741 | ||
742 | return flag_mask[prot_op]; | |
743 | } | |
744 | ||
c611529e MP |
745 | static unsigned char sd_setup_protect_cmnd(struct scsi_cmnd *scmd, |
746 | unsigned int dix, unsigned int dif) | |
35e1a5d9 | 747 | { |
5999ccff BVA |
748 | struct request *rq = scsi_cmd_to_rq(scmd); |
749 | struct bio *bio = rq->bio; | |
750 | unsigned int prot_op = sd_prot_op(rq_data_dir(rq), dix, dif); | |
c611529e MP |
751 | unsigned int protect = 0; |
752 | ||
753 | if (dix) { /* DIX Type 0, 1, 2, 3 */ | |
754 | if (bio_integrity_flagged(bio, BIP_IP_CHECKSUM)) | |
755 | scmd->prot_flags |= SCSI_PROT_IP_CHECKSUM; | |
756 | ||
757 | if (bio_integrity_flagged(bio, BIP_CTRL_NOCHECK) == false) | |
758 | scmd->prot_flags |= SCSI_PROT_GUARD_CHECK; | |
759 | } | |
760 | ||
8475c811 | 761 | if (dif != T10_PI_TYPE3_PROTECTION) { /* DIX/DIF Type 0, 1, 2 */ |
c611529e MP |
762 | scmd->prot_flags |= SCSI_PROT_REF_INCREMENT; |
763 | ||
764 | if (bio_integrity_flagged(bio, BIP_CTRL_NOCHECK) == false) | |
765 | scmd->prot_flags |= SCSI_PROT_REF_CHECK; | |
766 | } | |
767 | ||
768 | if (dif) { /* DIX/DIF Type 1, 2, 3 */ | |
769 | scmd->prot_flags |= SCSI_PROT_TRANSFER_PI; | |
770 | ||
771 | if (bio_integrity_flagged(bio, BIP_DISK_NOCHECK)) | |
772 | protect = 3 << 5; /* Disable target PI checking */ | |
773 | else | |
774 | protect = 1 << 5; /* Enable target PI checking */ | |
35e1a5d9 MP |
775 | } |
776 | ||
777 | scsi_set_prot_op(scmd, prot_op); | |
778 | scsi_set_prot_type(scmd, dif); | |
c611529e MP |
779 | scmd->prot_flags &= sd_prot_flag_mask(prot_op); |
780 | ||
781 | return protect; | |
35e1a5d9 MP |
782 | } |
783 | ||
c98a0eb0 MP |
784 | static void sd_config_discard(struct scsi_disk *sdkp, unsigned int mode) |
785 | { | |
786 | struct request_queue *q = sdkp->disk->queue; | |
787 | unsigned int logical_block_size = sdkp->device->sector_size; | |
788 | unsigned int max_blocks = 0; | |
789 | ||
bcd069bb MP |
790 | q->limits.discard_alignment = |
791 | sdkp->unmap_alignment * logical_block_size; | |
792 | q->limits.discard_granularity = | |
793 | max(sdkp->physical_block_size, | |
794 | sdkp->unmap_granularity * logical_block_size); | |
89730393 MP |
795 | sdkp->provisioning_mode = mode; |
796 | ||
c98a0eb0 MP |
797 | switch (mode) { |
798 | ||
4c11712a | 799 | case SD_LBP_FULL: |
c98a0eb0 | 800 | case SD_LBP_DISABLE: |
2bb4cd5c | 801 | blk_queue_max_discard_sectors(q, 0); |
c98a0eb0 MP |
802 | return; |
803 | ||
804 | case SD_LBP_UNMAP: | |
5db44863 MP |
805 | max_blocks = min_not_zero(sdkp->max_unmap_blocks, |
806 | (u32)SD_MAX_WS16_BLOCKS); | |
c98a0eb0 MP |
807 | break; |
808 | ||
809 | case SD_LBP_WS16: | |
28a0bc41 MP |
810 | if (sdkp->device->unmap_limit_for_ws) |
811 | max_blocks = sdkp->max_unmap_blocks; | |
812 | else | |
813 | max_blocks = sdkp->max_ws_blocks; | |
814 | ||
815 | max_blocks = min_not_zero(max_blocks, (u32)SD_MAX_WS16_BLOCKS); | |
c98a0eb0 MP |
816 | break; |
817 | ||
818 | case SD_LBP_WS10: | |
28a0bc41 MP |
819 | if (sdkp->device->unmap_limit_for_ws) |
820 | max_blocks = sdkp->max_unmap_blocks; | |
821 | else | |
822 | max_blocks = sdkp->max_ws_blocks; | |
823 | ||
824 | max_blocks = min_not_zero(max_blocks, (u32)SD_MAX_WS10_BLOCKS); | |
c98a0eb0 MP |
825 | break; |
826 | ||
827 | case SD_LBP_ZERO: | |
5db44863 MP |
828 | max_blocks = min_not_zero(sdkp->max_ws_blocks, |
829 | (u32)SD_MAX_WS10_BLOCKS); | |
c98a0eb0 MP |
830 | break; |
831 | } | |
832 | ||
2bb4cd5c | 833 | blk_queue_max_discard_sectors(q, max_blocks * (logical_block_size >> 9)); |
c98a0eb0 MP |
834 | } |
835 | ||
f1e117cb CH |
836 | static void *sd_set_special_bvec(struct request *rq, unsigned int data_len) |
837 | { | |
838 | struct page *page; | |
839 | ||
840 | page = mempool_alloc(sd_page_pool, GFP_ATOMIC); | |
841 | if (!page) | |
842 | return NULL; | |
843 | clear_highpage(page); | |
844 | bvec_set_page(&rq->special_vec, page, data_len, 0); | |
845 | rq->rq_flags |= RQF_SPECIAL_PAYLOAD; | |
846 | return bvec_virt(&rq->special_vec); | |
847 | } | |
848 | ||
159b2cbf | 849 | static blk_status_t sd_setup_unmap_cmnd(struct scsi_cmnd *cmd) |
e339c1a7 | 850 | { |
6a7b4398 | 851 | struct scsi_device *sdp = cmd->device; |
5999ccff | 852 | struct request *rq = scsi_cmd_to_rq(cmd); |
f3fa33ac | 853 | struct scsi_disk *sdkp = scsi_disk(rq->q->disk); |
c6c93fdd MP |
854 | u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq)); |
855 | u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq)); | |
81d926e8 | 856 | unsigned int data_len = 24; |
c98a0eb0 | 857 | char *buf; |
e339c1a7 | 858 | |
f1e117cb CH |
859 | buf = sd_set_special_bvec(rq, data_len); |
860 | if (!buf) | |
159b2cbf | 861 | return BLK_STS_RESOURCE; |
66ac0280 | 862 | |
81d926e8 CH |
863 | cmd->cmd_len = 10; |
864 | cmd->cmnd[0] = UNMAP; | |
865 | cmd->cmnd[8] = 24; | |
e339c1a7 | 866 | |
81d926e8 CH |
867 | put_unaligned_be16(6 + 16, &buf[0]); |
868 | put_unaligned_be16(16, &buf[2]); | |
c6c93fdd MP |
869 | put_unaligned_be64(lba, &buf[8]); |
870 | put_unaligned_be32(nr_blocks, &buf[16]); | |
e339c1a7 | 871 | |
0610959f | 872 | cmd->allowed = sdkp->max_retries; |
81d926e8 CH |
873 | cmd->transfersize = data_len; |
874 | rq->timeout = SD_TIMEOUT; | |
e339c1a7 | 875 | |
7007e9dd | 876 | return scsi_alloc_sgtables(cmd); |
81d926e8 | 877 | } |
c98a0eb0 | 878 | |
159b2cbf CH |
879 | static blk_status_t sd_setup_write_same16_cmnd(struct scsi_cmnd *cmd, |
880 | bool unmap) | |
81d926e8 CH |
881 | { |
882 | struct scsi_device *sdp = cmd->device; | |
5999ccff | 883 | struct request *rq = scsi_cmd_to_rq(cmd); |
f3fa33ac | 884 | struct scsi_disk *sdkp = scsi_disk(rq->q->disk); |
c6c93fdd MP |
885 | u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq)); |
886 | u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq)); | |
81d926e8 | 887 | u32 data_len = sdp->sector_size; |
c98a0eb0 | 888 | |
f1e117cb | 889 | if (!sd_set_special_bvec(rq, data_len)) |
159b2cbf | 890 | return BLK_STS_RESOURCE; |
c98a0eb0 | 891 | |
81d926e8 CH |
892 | cmd->cmd_len = 16; |
893 | cmd->cmnd[0] = WRITE_SAME_16; | |
02d26103 | 894 | if (unmap) |
6a7b4398 | 895 | cmd->cmnd[1] = 0x8; /* UNMAP */ |
c6c93fdd MP |
896 | put_unaligned_be64(lba, &cmd->cmnd[2]); |
897 | put_unaligned_be32(nr_blocks, &cmd->cmnd[10]); | |
66ac0280 | 898 | |
0610959f | 899 | cmd->allowed = sdkp->max_retries; |
81d926e8 | 900 | cmd->transfersize = data_len; |
02d26103 | 901 | rq->timeout = unmap ? SD_TIMEOUT : SD_WRITE_SAME_TIMEOUT; |
c98a0eb0 | 902 | |
7007e9dd | 903 | return scsi_alloc_sgtables(cmd); |
81d926e8 | 904 | } |
c98a0eb0 | 905 | |
159b2cbf CH |
906 | static blk_status_t sd_setup_write_same10_cmnd(struct scsi_cmnd *cmd, |
907 | bool unmap) | |
81d926e8 CH |
908 | { |
909 | struct scsi_device *sdp = cmd->device; | |
5999ccff | 910 | struct request *rq = scsi_cmd_to_rq(cmd); |
f3fa33ac | 911 | struct scsi_disk *sdkp = scsi_disk(rq->q->disk); |
c6c93fdd MP |
912 | u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq)); |
913 | u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq)); | |
81d926e8 | 914 | u32 data_len = sdp->sector_size; |
c98a0eb0 | 915 | |
f1e117cb | 916 | if (!sd_set_special_bvec(rq, data_len)) |
159b2cbf | 917 | return BLK_STS_RESOURCE; |
e339c1a7 | 918 | |
81d926e8 CH |
919 | cmd->cmd_len = 10; |
920 | cmd->cmnd[0] = WRITE_SAME; | |
921 | if (unmap) | |
922 | cmd->cmnd[1] = 0x8; /* UNMAP */ | |
c6c93fdd MP |
923 | put_unaligned_be32(lba, &cmd->cmnd[2]); |
924 | put_unaligned_be16(nr_blocks, &cmd->cmnd[7]); | |
6a7b4398 | 925 | |
0610959f | 926 | cmd->allowed = sdkp->max_retries; |
81d926e8 | 927 | cmd->transfersize = data_len; |
02d26103 | 928 | rq->timeout = unmap ? SD_TIMEOUT : SD_WRITE_SAME_TIMEOUT; |
6a7b4398 | 929 | |
7007e9dd | 930 | return scsi_alloc_sgtables(cmd); |
f1126e95 | 931 | } |
f9d03f96 | 932 | |
159b2cbf | 933 | static blk_status_t sd_setup_write_zeroes_cmnd(struct scsi_cmnd *cmd) |
02d26103 | 934 | { |
5999ccff | 935 | struct request *rq = scsi_cmd_to_rq(cmd); |
02d26103 | 936 | struct scsi_device *sdp = cmd->device; |
f3fa33ac | 937 | struct scsi_disk *sdkp = scsi_disk(rq->q->disk); |
c6c93fdd MP |
938 | u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq)); |
939 | u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq)); | |
02d26103 | 940 | |
e4b87837 | 941 | if (!(rq->cmd_flags & REQ_NOUNMAP)) { |
e6bd9312 MP |
942 | switch (sdkp->zeroing_mode) { |
943 | case SD_ZERO_WS16_UNMAP: | |
39051dd8 | 944 | return sd_setup_write_same16_cmnd(cmd, true); |
e6bd9312 | 945 | case SD_ZERO_WS10_UNMAP: |
39051dd8 | 946 | return sd_setup_write_same10_cmnd(cmd, true); |
e4b87837 CH |
947 | } |
948 | } | |
c98a0eb0 | 949 | |
e5cc9002 EM |
950 | if (sdp->no_write_same) { |
951 | rq->rq_flags |= RQF_QUIET; | |
159b2cbf | 952 | return BLK_STS_TARGET; |
e5cc9002 | 953 | } |
ed44fd7f | 954 | |
c6c93fdd | 955 | if (sdkp->ws16 || lba > 0xffffffff || nr_blocks > 0xffff) |
39051dd8 | 956 | return sd_setup_write_same16_cmnd(cmd, false); |
ed44fd7f | 957 | |
39051dd8 | 958 | return sd_setup_write_same10_cmnd(cmd, false); |
f1126e95 FT |
959 | } |
960 | ||
5db44863 MP |
961 | static void sd_config_write_same(struct scsi_disk *sdkp) |
962 | { | |
963 | struct request_queue *q = sdkp->disk->queue; | |
964 | unsigned int logical_block_size = sdkp->device->sector_size; | |
5db44863 MP |
965 | |
966 | if (sdkp->device->no_write_same) { | |
967 | sdkp->max_ws_blocks = 0; | |
968 | goto out; | |
969 | } | |
970 | ||
971 | /* Some devices can not handle block counts above 0xffff despite | |
972 | * supporting WRITE SAME(16). Consequently we default to 64k | |
973 | * blocks per I/O unless the device explicitly advertises a | |
974 | * bigger limit. | |
975 | */ | |
66c28f97 MP |
976 | if (sdkp->max_ws_blocks > SD_MAX_WS10_BLOCKS) |
977 | sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks, | |
978 | (u32)SD_MAX_WS16_BLOCKS); | |
979 | else if (sdkp->ws16 || sdkp->ws10 || sdkp->device->no_report_opcodes) | |
980 | sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks, | |
981 | (u32)SD_MAX_WS10_BLOCKS); | |
982 | else { | |
983 | sdkp->device->no_write_same = 1; | |
984 | sdkp->max_ws_blocks = 0; | |
985 | } | |
5db44863 | 986 | |
e6bd9312 MP |
987 | if (sdkp->lbprz && sdkp->lbpws) |
988 | sdkp->zeroing_mode = SD_ZERO_WS16_UNMAP; | |
989 | else if (sdkp->lbprz && sdkp->lbpws10) | |
990 | sdkp->zeroing_mode = SD_ZERO_WS10_UNMAP; | |
991 | else if (sdkp->max_ws_blocks) | |
992 | sdkp->zeroing_mode = SD_ZERO_WS; | |
993 | else | |
994 | sdkp->zeroing_mode = SD_ZERO_WRITE; | |
995 | ||
b7af62a9 DLM |
996 | if (sdkp->max_ws_blocks && |
997 | sdkp->physical_block_size > logical_block_size) { | |
998 | /* | |
999 | * Reporting a maximum number of blocks that is not aligned | |
1000 | * on the device physical size would cause a large write same | |
1001 | * request to be split into physically unaligned chunks by | |
e383e16e CH |
1002 | * __blkdev_issue_write_zeroes() even if the caller of this |
1003 | * functions took care to align the large request. So make sure | |
1004 | * the maximum reported is aligned to the device physical block | |
1005 | * size. This is only an optional optimization for regular | |
1006 | * disks, but this is mandatory to avoid failure of large write | |
1007 | * same requests directed at sequential write required zones of | |
1008 | * host-managed ZBC disks. | |
b7af62a9 DLM |
1009 | */ |
1010 | sdkp->max_ws_blocks = | |
1011 | round_down(sdkp->max_ws_blocks, | |
1012 | bytes_to_logical(sdkp->device, | |
1013 | sdkp->physical_block_size)); | |
1014 | } | |
1015 | ||
5db44863 | 1016 | out: |
02d26103 CH |
1017 | blk_queue_max_write_zeroes_sectors(q, sdkp->max_ws_blocks * |
1018 | (logical_block_size >> 9)); | |
5db44863 MP |
1019 | } |
1020 | ||
159b2cbf | 1021 | static blk_status_t sd_setup_flush_cmnd(struct scsi_cmnd *cmd) |
90467c29 | 1022 | { |
5999ccff | 1023 | struct request *rq = scsi_cmd_to_rq(cmd); |
f3fa33ac | 1024 | struct scsi_disk *sdkp = scsi_disk(rq->q->disk); |
a118c6c1 CH |
1025 | |
1026 | /* flush requests don't perform I/O, zero the S/G table */ | |
1027 | memset(&cmd->sdb, 0, sizeof(cmd->sdb)); | |
90467c29 | 1028 | |
42c59077 SK |
1029 | if (cmd->device->use_16_for_sync) { |
1030 | cmd->cmnd[0] = SYNCHRONIZE_CACHE_16; | |
1031 | cmd->cmd_len = 16; | |
1032 | } else { | |
1033 | cmd->cmnd[0] = SYNCHRONIZE_CACHE; | |
1034 | cmd->cmd_len = 10; | |
1035 | } | |
a118c6c1 | 1036 | cmd->transfersize = 0; |
0610959f | 1037 | cmd->allowed = sdkp->max_retries; |
a118c6c1 | 1038 | |
26b9fd8b | 1039 | rq->timeout = rq->q->rq_timeout * SD_FLUSH_TIMEOUT_MULTIPLIER; |
159b2cbf | 1040 | return BLK_STS_OK; |
90467c29 FT |
1041 | } |
1042 | ||
78a02f49 MP |
1043 | static blk_status_t sd_setup_rw32_cmnd(struct scsi_cmnd *cmd, bool write, |
1044 | sector_t lba, unsigned int nr_blocks, | |
e59e80cf | 1045 | unsigned char flags, unsigned int dld) |
1da177e4 | 1046 | { |
78a02f49 | 1047 | cmd->cmd_len = SD_EXT_CDB_SIZE; |
78a02f49 MP |
1048 | cmd->cmnd[0] = VARIABLE_LENGTH_CMD; |
1049 | cmd->cmnd[7] = 0x18; /* Additional CDB len */ | |
1050 | cmd->cmnd[9] = write ? WRITE_32 : READ_32; | |
1051 | cmd->cmnd[10] = flags; | |
e59e80cf | 1052 | cmd->cmnd[11] = dld & 0x07; |
78a02f49 MP |
1053 | put_unaligned_be64(lba, &cmd->cmnd[12]); |
1054 | put_unaligned_be32(lba, &cmd->cmnd[20]); /* Expected Indirect LBA */ | |
1055 | put_unaligned_be32(nr_blocks, &cmd->cmnd[28]); | |
1056 | ||
1057 | return BLK_STS_OK; | |
1058 | } | |
1059 | ||
1060 | static blk_status_t sd_setup_rw16_cmnd(struct scsi_cmnd *cmd, bool write, | |
1061 | sector_t lba, unsigned int nr_blocks, | |
e59e80cf | 1062 | unsigned char flags, unsigned int dld) |
78a02f49 MP |
1063 | { |
1064 | cmd->cmd_len = 16; | |
1065 | cmd->cmnd[0] = write ? WRITE_16 : READ_16; | |
e59e80cf DLM |
1066 | cmd->cmnd[1] = flags | ((dld >> 2) & 0x01); |
1067 | cmd->cmnd[14] = (dld & 0x03) << 6; | |
78a02f49 MP |
1068 | cmd->cmnd[15] = 0; |
1069 | put_unaligned_be64(lba, &cmd->cmnd[2]); | |
1070 | put_unaligned_be32(nr_blocks, &cmd->cmnd[10]); | |
1071 | ||
1072 | return BLK_STS_OK; | |
1073 | } | |
1074 | ||
1075 | static blk_status_t sd_setup_rw10_cmnd(struct scsi_cmnd *cmd, bool write, | |
1076 | sector_t lba, unsigned int nr_blocks, | |
1077 | unsigned char flags) | |
1078 | { | |
1079 | cmd->cmd_len = 10; | |
1080 | cmd->cmnd[0] = write ? WRITE_10 : READ_10; | |
1081 | cmd->cmnd[1] = flags; | |
1082 | cmd->cmnd[6] = 0; | |
1083 | cmd->cmnd[9] = 0; | |
1084 | put_unaligned_be32(lba, &cmd->cmnd[2]); | |
1085 | put_unaligned_be16(nr_blocks, &cmd->cmnd[7]); | |
1086 | ||
1087 | return BLK_STS_OK; | |
1088 | } | |
1089 | ||
1090 | static blk_status_t sd_setup_rw6_cmnd(struct scsi_cmnd *cmd, bool write, | |
1091 | sector_t lba, unsigned int nr_blocks, | |
1092 | unsigned char flags) | |
1093 | { | |
db5db4b9 BVA |
1094 | /* Avoid that 0 blocks gets translated into 256 blocks. */ |
1095 | if (WARN_ON_ONCE(nr_blocks == 0)) | |
1096 | return BLK_STS_IOERR; | |
1097 | ||
78a02f49 MP |
1098 | if (unlikely(flags & 0x8)) { |
1099 | /* | |
1100 | * This happens only if this drive failed 10byte rw | |
1101 | * command with ILLEGAL_REQUEST during operation and | |
1102 | * thus turned off use_10_for_rw. | |
1103 | */ | |
1104 | scmd_printk(KERN_ERR, cmd, "FUA write on READ/WRITE(6) drive\n"); | |
1105 | return BLK_STS_IOERR; | |
1106 | } | |
1107 | ||
1108 | cmd->cmd_len = 6; | |
1109 | cmd->cmnd[0] = write ? WRITE_6 : READ_6; | |
1110 | cmd->cmnd[1] = (lba >> 16) & 0x1f; | |
1111 | cmd->cmnd[2] = (lba >> 8) & 0xff; | |
1112 | cmd->cmnd[3] = lba & 0xff; | |
1113 | cmd->cmnd[4] = nr_blocks; | |
1114 | cmd->cmnd[5] = 0; | |
1115 | ||
1116 | return BLK_STS_OK; | |
1117 | } | |
1118 | ||
e59e80cf DLM |
1119 | /* |
1120 | * Check if a command has a duration limit set. If it does, and the target | |
1121 | * device supports CDL and the feature is enabled, return the limit | |
1122 | * descriptor index to use. Return 0 (no limit) otherwise. | |
1123 | */ | |
1124 | static int sd_cdl_dld(struct scsi_disk *sdkp, struct scsi_cmnd *scmd) | |
1125 | { | |
1126 | struct scsi_device *sdp = sdkp->device; | |
1127 | int hint; | |
1128 | ||
1129 | if (!sdp->cdl_supported || !sdp->cdl_enable) | |
1130 | return 0; | |
1131 | ||
1132 | /* | |
1133 | * Use "no limit" if the request ioprio does not specify a duration | |
1134 | * limit hint. | |
1135 | */ | |
1136 | hint = IOPRIO_PRIO_HINT(req_get_ioprio(scsi_cmd_to_rq(scmd))); | |
1137 | if (hint < IOPRIO_HINT_DEV_DURATION_LIMIT_1 || | |
1138 | hint > IOPRIO_HINT_DEV_DURATION_LIMIT_7) | |
1139 | return 0; | |
1140 | ||
1141 | return (hint - IOPRIO_HINT_DEV_DURATION_LIMIT_1) + 1; | |
1142 | } | |
1143 | ||
cf64e5a5 | 1144 | static blk_status_t sd_setup_read_write_cmnd(struct scsi_cmnd *cmd) |
1da177e4 | 1145 | { |
5999ccff | 1146 | struct request *rq = scsi_cmd_to_rq(cmd); |
cf64e5a5 | 1147 | struct scsi_device *sdp = cmd->device; |
f3fa33ac | 1148 | struct scsi_disk *sdkp = scsi_disk(rq->q->disk); |
ec029758 | 1149 | sector_t lba = sectors_to_logical(sdp, blk_rq_pos(rq)); |
18351070 | 1150 | sector_t threshold; |
ec029758 | 1151 | unsigned int nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq)); |
ec029758 | 1152 | unsigned int mask = logical_to_sectors(sdp, 1) - 1; |
78a02f49 MP |
1153 | bool write = rq_data_dir(rq) == WRITE; |
1154 | unsigned char protect, fua; | |
e59e80cf | 1155 | unsigned int dld; |
159b2cbf | 1156 | blk_status_t ret; |
0cf9f4e5 XC |
1157 | unsigned int dif; |
1158 | bool dix; | |
7f9a6bc4 | 1159 | |
7007e9dd | 1160 | ret = scsi_alloc_sgtables(cmd); |
159b2cbf | 1161 | if (ret != BLK_STS_OK) |
39051dd8 | 1162 | return ret; |
7f9a6bc4 | 1163 | |
7007e9dd | 1164 | ret = BLK_STS_IOERR; |
e249e42d | 1165 | if (!scsi_device_online(sdp) || sdp->changed) { |
cf64e5a5 | 1166 | scmd_printk(KERN_ERR, cmd, "device offline or changed\n"); |
7007e9dd | 1167 | goto fail; |
1da177e4 LT |
1168 | } |
1169 | ||
f3fa33ac | 1170 | if (blk_rq_pos(rq) + blk_rq_sectors(rq) > get_capacity(rq->q->disk)) { |
cf64e5a5 | 1171 | scmd_printk(KERN_ERR, cmd, "access beyond end of device\n"); |
7007e9dd | 1172 | goto fail; |
e249e42d MP |
1173 | } |
1174 | ||
1175 | if ((blk_rq_pos(rq) & mask) || (blk_rq_sectors(rq) & mask)) { | |
cf64e5a5 | 1176 | scmd_printk(KERN_ERR, cmd, "request not aligned to the logical block size\n"); |
7007e9dd | 1177 | goto fail; |
1da177e4 | 1178 | } |
7f9a6bc4 | 1179 | |
a0899d4d | 1180 | /* |
ec029758 MP |
1181 | * Some SD card readers can't handle accesses which touch the |
1182 | * last one or two logical blocks. Split accesses as needed. | |
a0899d4d | 1183 | */ |
ec029758 | 1184 | threshold = sdkp->capacity - SD_LAST_BUGGY_SECTORS; |
18351070 | 1185 | |
c6c93fdd MP |
1186 | if (unlikely(sdp->last_sector_bug && lba + nr_blocks > threshold)) { |
1187 | if (lba < threshold) { | |
18351070 | 1188 | /* Access up to the threshold but not beyond */ |
c6c93fdd | 1189 | nr_blocks = threshold - lba; |
18351070 | 1190 | } else { |
ec029758 MP |
1191 | /* Access only a single logical block */ |
1192 | nr_blocks = 1; | |
18351070 LT |
1193 | } |
1194 | } | |
a0899d4d | 1195 | |
5795eb44 JT |
1196 | if (req_op(rq) == REQ_OP_ZONE_APPEND) { |
1197 | ret = sd_zbc_prepare_zone_append(cmd, &lba, nr_blocks); | |
1198 | if (ret) | |
7007e9dd | 1199 | goto fail; |
5795eb44 JT |
1200 | } |
1201 | ||
78a02f49 | 1202 | fua = rq->cmd_flags & REQ_FUA ? 0x8 : 0; |
cf64e5a5 BVA |
1203 | dix = scsi_prot_sg_count(cmd); |
1204 | dif = scsi_host_dif_capable(cmd->device->host, sdkp->protection_type); | |
e59e80cf | 1205 | dld = sd_cdl_dld(sdkp, cmd); |
1da177e4 | 1206 | |
c611529e | 1207 | if (dif || dix) |
cf64e5a5 | 1208 | protect = sd_setup_protect_cmnd(cmd, dix, dif); |
af55ff67 | 1209 | else |
4e7392ec MP |
1210 | protect = 0; |
1211 | ||
8475c811 | 1212 | if (protect && sdkp->protection_type == T10_PI_TYPE2_PROTECTION) { |
cf64e5a5 | 1213 | ret = sd_setup_rw32_cmnd(cmd, write, lba, nr_blocks, |
e59e80cf | 1214 | protect | fua, dld); |
c6c93fdd | 1215 | } else if (sdp->use_16_for_rw || (nr_blocks > 0xffff)) { |
cf64e5a5 | 1216 | ret = sd_setup_rw16_cmnd(cmd, write, lba, nr_blocks, |
e59e80cf | 1217 | protect | fua, dld); |
c6c93fdd | 1218 | } else if ((nr_blocks > 0xff) || (lba > 0x1fffff) || |
e249e42d | 1219 | sdp->use_10_for_rw || protect) { |
cf64e5a5 | 1220 | ret = sd_setup_rw10_cmnd(cmd, write, lba, nr_blocks, |
78a02f49 | 1221 | protect | fua); |
1da177e4 | 1222 | } else { |
cf64e5a5 | 1223 | ret = sd_setup_rw6_cmnd(cmd, write, lba, nr_blocks, |
78a02f49 | 1224 | protect | fua); |
1da177e4 | 1225 | } |
78a02f49 MP |
1226 | |
1227 | if (unlikely(ret != BLK_STS_OK)) | |
7007e9dd | 1228 | goto fail; |
1da177e4 LT |
1229 | |
1230 | /* | |
1231 | * We shouldn't disconnect in the middle of a sector, so with a dumb | |
1232 | * host adapter, it's safe to assume that we can at least transfer | |
1233 | * this many bytes between each connect / disconnect. | |
1234 | */ | |
cf64e5a5 BVA |
1235 | cmd->transfersize = sdp->sector_size; |
1236 | cmd->underflow = nr_blocks << 9; | |
0610959f | 1237 | cmd->allowed = sdkp->max_retries; |
cf64e5a5 | 1238 | cmd->sdb.length = nr_blocks * sdp->sector_size; |
e249e42d MP |
1239 | |
1240 | SCSI_LOG_HLQUEUE(1, | |
cf64e5a5 | 1241 | scmd_printk(KERN_INFO, cmd, |
e249e42d MP |
1242 | "%s: block=%llu, count=%d\n", __func__, |
1243 | (unsigned long long)blk_rq_pos(rq), | |
1244 | blk_rq_sectors(rq))); | |
1245 | SCSI_LOG_HLQUEUE(2, | |
cf64e5a5 | 1246 | scmd_printk(KERN_INFO, cmd, |
e249e42d MP |
1247 | "%s %d/%u 512 byte blocks.\n", |
1248 | write ? "writing" : "reading", nr_blocks, | |
1249 | blk_rq_sectors(rq))); | |
1da177e4 | 1250 | |
1da177e4 | 1251 | /* |
7007e9dd | 1252 | * This indicates that the command is ready from our end to be queued. |
1da177e4 | 1253 | */ |
159b2cbf | 1254 | return BLK_STS_OK; |
7007e9dd CH |
1255 | fail: |
1256 | scsi_free_sgtables(cmd); | |
1257 | return ret; | |
1da177e4 LT |
1258 | } |
1259 | ||
159b2cbf | 1260 | static blk_status_t sd_init_command(struct scsi_cmnd *cmd) |
87949eee | 1261 | { |
5999ccff | 1262 | struct request *rq = scsi_cmd_to_rq(cmd); |
87949eee | 1263 | |
c2df40df MC |
1264 | switch (req_op(rq)) { |
1265 | case REQ_OP_DISCARD: | |
f3fa33ac | 1266 | switch (scsi_disk(rq->q->disk)->provisioning_mode) { |
81d926e8 CH |
1267 | case SD_LBP_UNMAP: |
1268 | return sd_setup_unmap_cmnd(cmd); | |
1269 | case SD_LBP_WS16: | |
02d26103 | 1270 | return sd_setup_write_same16_cmnd(cmd, true); |
81d926e8 CH |
1271 | case SD_LBP_WS10: |
1272 | return sd_setup_write_same10_cmnd(cmd, true); | |
1273 | case SD_LBP_ZERO: | |
1274 | return sd_setup_write_same10_cmnd(cmd, false); | |
1275 | default: | |
159b2cbf | 1276 | return BLK_STS_TARGET; |
81d926e8 | 1277 | } |
02d26103 CH |
1278 | case REQ_OP_WRITE_ZEROES: |
1279 | return sd_setup_write_zeroes_cmnd(cmd); | |
3a5e02ce | 1280 | case REQ_OP_FLUSH: |
87949eee | 1281 | return sd_setup_flush_cmnd(cmd); |
c2df40df MC |
1282 | case REQ_OP_READ: |
1283 | case REQ_OP_WRITE: | |
5795eb44 | 1284 | case REQ_OP_ZONE_APPEND: |
87949eee | 1285 | return sd_setup_read_write_cmnd(cmd); |
89d94756 | 1286 | case REQ_OP_ZONE_RESET: |
ad512f20 AJ |
1287 | return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_RESET_WRITE_POINTER, |
1288 | false); | |
d81e9d49 | 1289 | case REQ_OP_ZONE_RESET_ALL: |
ad512f20 AJ |
1290 | return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_RESET_WRITE_POINTER, |
1291 | true); | |
1292 | case REQ_OP_ZONE_OPEN: | |
1293 | return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_OPEN_ZONE, false); | |
1294 | case REQ_OP_ZONE_CLOSE: | |
1295 | return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_CLOSE_ZONE, false); | |
1296 | case REQ_OP_ZONE_FINISH: | |
1297 | return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_FINISH_ZONE, false); | |
c2df40df | 1298 | default: |
f1f1fada | 1299 | WARN_ON_ONCE(1); |
159b2cbf | 1300 | return BLK_STS_NOTSUPP; |
c2df40df | 1301 | } |
87949eee CH |
1302 | } |
1303 | ||
1304 | static void sd_uninit_command(struct scsi_cmnd *SCpnt) | |
1305 | { | |
5999ccff | 1306 | struct request *rq = scsi_cmd_to_rq(SCpnt); |
87949eee | 1307 | |
f9d03f96 | 1308 | if (rq->rq_flags & RQF_SPECIAL_PAYLOAD) |
61cce6f6 | 1309 | mempool_free(rq->special_vec.bv_page, sd_page_pool); |
87949eee CH |
1310 | } |
1311 | ||
444aa2c5 | 1312 | static bool sd_need_revalidate(struct gendisk *disk, struct scsi_disk *sdkp) |
d1b7f920 CH |
1313 | { |
1314 | if (sdkp->device->removable || sdkp->write_prot) { | |
444aa2c5 | 1315 | if (disk_check_media_change(disk)) |
d1b7f920 CH |
1316 | return true; |
1317 | } | |
1318 | ||
1319 | /* | |
1320 | * Force a full rescan after ioctl(BLKRRPART). While the disk state has | |
1321 | * nothing to do with partitions, BLKRRPART is used to force a full | |
1322 | * revalidate after things like a format for historical reasons. | |
1323 | */ | |
444aa2c5 | 1324 | return test_bit(GD_NEED_PART_SCAN, &disk->state); |
d1b7f920 CH |
1325 | } |
1326 | ||
1da177e4 LT |
1327 | /** |
1328 | * sd_open - open a scsi disk device | |
d32e2bf8 | 1329 | * @disk: disk to open |
05bdb996 | 1330 | * @mode: open mode |
1da177e4 LT |
1331 | * |
1332 | * Returns 0 if successful. Returns a negated errno value in case | |
1333 | * of error. | |
1334 | * | |
1335 | * Note: This can be called from a user context (e.g. fsck(1) ) | |
1336 | * or from within the kernel (e.g. as a result of a mount(1) ). | |
1337 | * In the latter case @inode and @filp carry an abridged amount | |
1338 | * of information as noted above. | |
409f3499 | 1339 | * |
d32e2bf8 | 1340 | * Locking: called with disk->open_mutex held. |
1da177e4 | 1341 | **/ |
05bdb996 | 1342 | static int sd_open(struct gendisk *disk, blk_mode_t mode) |
1da177e4 | 1343 | { |
d32e2bf8 | 1344 | struct scsi_disk *sdkp = scsi_disk(disk); |
9c63f7f6 | 1345 | struct scsi_device *sdev = sdkp->device; |
1da177e4 LT |
1346 | int retval; |
1347 | ||
9c63f7f6 | 1348 | if (scsi_device_get(sdev)) |
1da177e4 LT |
1349 | return -ENXIO; |
1350 | ||
fa0d34be | 1351 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_open\n")); |
1da177e4 | 1352 | |
1da177e4 LT |
1353 | /* |
1354 | * If the device is in error recovery, wait until it is done. | |
1355 | * If the device is offline, then disallow any access to it. | |
1356 | */ | |
1357 | retval = -ENXIO; | |
1358 | if (!scsi_block_when_processing_errors(sdev)) | |
1359 | goto error_out; | |
1360 | ||
d32e2bf8 CH |
1361 | if (sd_need_revalidate(disk, sdkp)) |
1362 | sd_revalidate_disk(disk); | |
1da177e4 LT |
1363 | |
1364 | /* | |
1365 | * If the drive is empty, just let the open fail. | |
1366 | */ | |
1367 | retval = -ENOMEDIUM; | |
05bdb996 CH |
1368 | if (sdev->removable && !sdkp->media_present && |
1369 | !(mode & BLK_OPEN_NDELAY)) | |
1da177e4 LT |
1370 | goto error_out; |
1371 | ||
1372 | /* | |
1373 | * If the device has the write protect tab set, have the open fail | |
1374 | * if the user expects to be able to write to the thing. | |
1375 | */ | |
1376 | retval = -EROFS; | |
05bdb996 | 1377 | if (sdkp->write_prot && (mode & BLK_OPEN_WRITE)) |
1da177e4 LT |
1378 | goto error_out; |
1379 | ||
1380 | /* | |
1381 | * It is possible that the disk changing stuff resulted in | |
1382 | * the device being taken offline. If this is the case, | |
1383 | * report this to the user, and don't pretend that the | |
1384 | * open actually succeeded. | |
1385 | */ | |
1386 | retval = -ENXIO; | |
1387 | if (!scsi_device_online(sdev)) | |
1388 | goto error_out; | |
1389 | ||
409f3499 | 1390 | if ((atomic_inc_return(&sdkp->openers) == 1) && sdev->removable) { |
1da177e4 LT |
1391 | if (scsi_block_when_processing_errors(sdev)) |
1392 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT); | |
1393 | } | |
1394 | ||
1395 | return 0; | |
1396 | ||
1397 | error_out: | |
9c63f7f6 | 1398 | scsi_device_put(sdev); |
1da177e4 LT |
1399 | return retval; |
1400 | } | |
1401 | ||
1402 | /** | |
1403 | * sd_release - invoked when the (last) close(2) is called on this | |
1404 | * scsi disk. | |
7529fbb0 | 1405 | * @disk: disk to release |
1da177e4 LT |
1406 | * |
1407 | * Returns 0. | |
1408 | * | |
1409 | * Note: may block (uninterruptible) if error recovery is underway | |
1410 | * on this disk. | |
409f3499 | 1411 | * |
05bdb996 | 1412 | * Locking: called with disk->open_mutex held. |
1da177e4 | 1413 | **/ |
ae220766 | 1414 | static void sd_release(struct gendisk *disk) |
1da177e4 | 1415 | { |
1da177e4 LT |
1416 | struct scsi_disk *sdkp = scsi_disk(disk); |
1417 | struct scsi_device *sdev = sdkp->device; | |
1418 | ||
56937f7b | 1419 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_release\n")); |
1da177e4 | 1420 | |
7e443312 | 1421 | if (atomic_dec_return(&sdkp->openers) == 0 && sdev->removable) { |
1da177e4 LT |
1422 | if (scsi_block_when_processing_errors(sdev)) |
1423 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW); | |
1424 | } | |
1425 | ||
9c63f7f6 | 1426 | scsi_device_put(sdev); |
1da177e4 LT |
1427 | } |
1428 | ||
a885c8c4 | 1429 | static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
1da177e4 LT |
1430 | { |
1431 | struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk); | |
1432 | struct scsi_device *sdp = sdkp->device; | |
1433 | struct Scsi_Host *host = sdp->host; | |
f08bb1e0 | 1434 | sector_t capacity = logical_to_sectors(sdp, sdkp->capacity); |
1da177e4 LT |
1435 | int diskinfo[4]; |
1436 | ||
1437 | /* default to most commonly used values */ | |
f08bb1e0 MP |
1438 | diskinfo[0] = 0x40; /* 1 << 6 */ |
1439 | diskinfo[1] = 0x20; /* 1 << 5 */ | |
1440 | diskinfo[2] = capacity >> 11; | |
1441 | ||
1da177e4 LT |
1442 | /* override with calculated, extended default, or driver values */ |
1443 | if (host->hostt->bios_param) | |
f08bb1e0 | 1444 | host->hostt->bios_param(sdp, bdev, capacity, diskinfo); |
1da177e4 | 1445 | else |
f08bb1e0 | 1446 | scsicam_bios_param(bdev, capacity, diskinfo); |
1da177e4 | 1447 | |
a885c8c4 CH |
1448 | geo->heads = diskinfo[0]; |
1449 | geo->sectors = diskinfo[1]; | |
1450 | geo->cylinders = diskinfo[2]; | |
1da177e4 LT |
1451 | return 0; |
1452 | } | |
1453 | ||
1454 | /** | |
44328310 | 1455 | * sd_ioctl - process an ioctl |
7529fbb0 | 1456 | * @bdev: target block device |
05bdb996 | 1457 | * @mode: open mode |
1da177e4 | 1458 | * @cmd: ioctl command number |
44328310 | 1459 | * @arg: this is third argument given to ioctl(2) system call. |
1da177e4 LT |
1460 | * Often contains a pointer. |
1461 | * | |
25985edc | 1462 | * Returns 0 if successful (some ioctls return positive numbers on |
1da177e4 LT |
1463 | * success as well). Returns a negated errno value in case of error. |
1464 | * | |
1465 | * Note: most ioctls are forward onto the block subsystem or further | |
3a4fa0a2 | 1466 | * down in the scsi subsystem. |
1da177e4 | 1467 | **/ |
05bdb996 | 1468 | static int sd_ioctl(struct block_device *bdev, blk_mode_t mode, |
44328310 | 1469 | unsigned int cmd, unsigned long arg) |
1da177e4 | 1470 | { |
1da177e4 | 1471 | struct gendisk *disk = bdev->bd_disk; |
fe2d1851 NN |
1472 | struct scsi_disk *sdkp = scsi_disk(disk); |
1473 | struct scsi_device *sdp = sdkp->device; | |
44328310 | 1474 | void __user *p = (void __user *)arg; |
1da177e4 LT |
1475 | int error; |
1476 | ||
fe2d1851 NN |
1477 | SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO, sdkp, "sd_ioctl: disk=%s, " |
1478 | "cmd=0x%x\n", disk->disk_name, cmd)); | |
1da177e4 | 1479 | |
4f07bfc5 CH |
1480 | if (bdev_is_partition(bdev) && !capable(CAP_SYS_RAWIO)) |
1481 | return -ENOIOCTLCMD; | |
0bfc96cb | 1482 | |
1da177e4 LT |
1483 | /* |
1484 | * If we are in the middle of error recovery, don't let anyone | |
1485 | * else try and use this device. Also, if error recovery fails, it | |
1486 | * may try and take the device offline, in which case all further | |
1487 | * access to the device is prohibited. | |
1488 | */ | |
906d15fb | 1489 | error = scsi_ioctl_block_when_processing_errors(sdp, cmd, |
05bdb996 | 1490 | (mode & BLK_OPEN_NDELAY)); |
906d15fb | 1491 | if (error) |
44328310 | 1492 | return error; |
1da177e4 | 1493 | |
d80210f2 CH |
1494 | if (is_sed_ioctl(cmd)) |
1495 | return sed_ioctl(sdkp->opal_dev, cmd, p); | |
05bdb996 | 1496 | return scsi_ioctl(sdp, mode & BLK_OPEN_WRITE, cmd, p); |
1da177e4 LT |
1497 | } |
1498 | ||
1499 | static void set_media_not_present(struct scsi_disk *sdkp) | |
1500 | { | |
2bae0093 TH |
1501 | if (sdkp->media_present) |
1502 | sdkp->device->changed = 1; | |
1503 | ||
1504 | if (sdkp->device->removable) { | |
1505 | sdkp->media_present = 0; | |
1506 | sdkp->capacity = 0; | |
1507 | } | |
1508 | } | |
1509 | ||
1510 | static int media_not_present(struct scsi_disk *sdkp, | |
1511 | struct scsi_sense_hdr *sshdr) | |
1512 | { | |
1513 | if (!scsi_sense_valid(sshdr)) | |
1514 | return 0; | |
1515 | ||
1516 | /* not invoked for commands that could return deferred errors */ | |
1517 | switch (sshdr->sense_key) { | |
1518 | case UNIT_ATTENTION: | |
1519 | case NOT_READY: | |
1520 | /* medium not present */ | |
1521 | if (sshdr->asc == 0x3A) { | |
1522 | set_media_not_present(sdkp); | |
1523 | return 1; | |
1524 | } | |
1525 | } | |
1526 | return 0; | |
1da177e4 LT |
1527 | } |
1528 | ||
1529 | /** | |
2bae0093 TH |
1530 | * sd_check_events - check media events |
1531 | * @disk: kernel device descriptor | |
1532 | * @clearing: disk events currently being cleared | |
1da177e4 | 1533 | * |
2bae0093 | 1534 | * Returns mask of DISK_EVENT_*. |
1da177e4 LT |
1535 | * |
1536 | * Note: this function is invoked from the block subsystem. | |
1537 | **/ | |
2bae0093 | 1538 | static unsigned int sd_check_events(struct gendisk *disk, unsigned int clearing) |
1da177e4 | 1539 | { |
9c63f7f6 | 1540 | struct scsi_disk *sdkp = disk->private_data; |
eb72d0bb | 1541 | struct scsi_device *sdp; |
1da177e4 | 1542 | int retval; |
41e70e30 | 1543 | bool disk_changed; |
1da177e4 | 1544 | |
eb72d0bb HR |
1545 | if (!sdkp) |
1546 | return 0; | |
1547 | ||
1548 | sdp = sdkp->device; | |
2bae0093 | 1549 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_check_events\n")); |
1da177e4 LT |
1550 | |
1551 | /* | |
1552 | * If the device is offline, don't send any commands - just pretend as | |
1553 | * if the command failed. If the device ever comes back online, we | |
1554 | * can deal with it then. It is only because of unrecoverable errors | |
1555 | * that we would ever take a device offline in the first place. | |
1556 | */ | |
285e9670 KS |
1557 | if (!scsi_device_online(sdp)) { |
1558 | set_media_not_present(sdkp); | |
285e9670 KS |
1559 | goto out; |
1560 | } | |
1da177e4 LT |
1561 | |
1562 | /* | |
1563 | * Using TEST_UNIT_READY enables differentiation between drive with | |
1564 | * no cartridge loaded - NOT READY, drive with changed cartridge - | |
1565 | * UNIT ATTENTION, or with same cartridge - GOOD STATUS. | |
1566 | * | |
1567 | * Drives that auto spin down. eg iomega jaz 1G, will be started | |
1568 | * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever | |
1569 | * sd_revalidate() is called. | |
1570 | */ | |
001aac25 | 1571 | if (scsi_block_when_processing_errors(sdp)) { |
6fa2b8f9 CH |
1572 | struct scsi_sense_hdr sshdr = { 0, }; |
1573 | ||
0610959f | 1574 | retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, sdkp->max_retries, |
6fa2b8f9 | 1575 | &sshdr); |
1da177e4 | 1576 | |
6fa2b8f9 | 1577 | /* failed to execute TUR, assume media not present */ |
ced202f7 | 1578 | if (retval < 0 || host_byte(retval)) { |
6fa2b8f9 CH |
1579 | set_media_not_present(sdkp); |
1580 | goto out; | |
1581 | } | |
1da177e4 | 1582 | |
6fa2b8f9 CH |
1583 | if (media_not_present(sdkp, &sshdr)) |
1584 | goto out; | |
1585 | } | |
2bae0093 | 1586 | |
1da177e4 LT |
1587 | /* |
1588 | * For removable scsi disk we have to recognise the presence | |
2bae0093 | 1589 | * of a disk in the drive. |
1da177e4 | 1590 | */ |
2bae0093 TH |
1591 | if (!sdkp->media_present) |
1592 | sdp->changed = 1; | |
1da177e4 | 1593 | sdkp->media_present = 1; |
285e9670 | 1594 | out: |
3ff5588d | 1595 | /* |
2bae0093 | 1596 | * sdp->changed is set under the following conditions: |
3ff5588d | 1597 | * |
2bae0093 TH |
1598 | * Medium present state has changed in either direction. |
1599 | * Device has indicated UNIT_ATTENTION. | |
3ff5588d | 1600 | */ |
41e70e30 | 1601 | disk_changed = sdp->changed; |
2bae0093 | 1602 | sdp->changed = 0; |
41e70e30 | 1603 | return disk_changed ? DISK_EVENT_MEDIA_CHANGE : 0; |
1da177e4 LT |
1604 | } |
1605 | ||
4fa83244 | 1606 | static int sd_sync_cache(struct scsi_disk *sdkp, struct scsi_sense_hdr *sshdr) |
1da177e4 | 1607 | { |
1da177e4 | 1608 | int retries, res; |
e73aec82 | 1609 | struct scsi_device *sdp = sdkp->device; |
7e660100 JB |
1610 | const int timeout = sdp->request_queue->rq_timeout |
1611 | * SD_FLUSH_TIMEOUT_MULTIPLIER; | |
4fa83244 | 1612 | struct scsi_sense_hdr my_sshdr; |
af16cd63 MC |
1613 | const struct scsi_exec_args exec_args = { |
1614 | .req_flags = BLK_MQ_REQ_PM, | |
1615 | /* caller might not be interested in sense, but we need it */ | |
1616 | .sshdr = sshdr ? : &my_sshdr, | |
1617 | }; | |
1da177e4 LT |
1618 | |
1619 | if (!scsi_device_online(sdp)) | |
1620 | return -ENODEV; | |
1621 | ||
af16cd63 | 1622 | sshdr = exec_args.sshdr; |
4fa83244 | 1623 | |
1da177e4 | 1624 | for (retries = 3; retries > 0; --retries) { |
42c59077 | 1625 | unsigned char cmd[16] = { 0 }; |
1da177e4 | 1626 | |
42c59077 SK |
1627 | if (sdp->use_16_for_sync) |
1628 | cmd[0] = SYNCHRONIZE_CACHE_16; | |
1629 | else | |
1630 | cmd[0] = SYNCHRONIZE_CACHE; | |
1da177e4 LT |
1631 | /* |
1632 | * Leave the rest of the command zero to indicate | |
1633 | * flush everything. | |
1634 | */ | |
af16cd63 MC |
1635 | res = scsi_execute_cmd(sdp, cmd, REQ_OP_DRV_IN, NULL, 0, |
1636 | timeout, sdkp->max_retries, &exec_args); | |
ea73a9f2 | 1637 | if (res == 0) |
1da177e4 LT |
1638 | break; |
1639 | } | |
1640 | ||
e73aec82 | 1641 | if (res) { |
ef61329d | 1642 | sd_print_result(sdkp, "Synchronize Cache(10) failed", res); |
95897910 | 1643 | |
ced202f7 HR |
1644 | if (res < 0) |
1645 | return res; | |
1646 | ||
464a00c9 HR |
1647 | if (scsi_status_is_check_condition(res) && |
1648 | scsi_sense_valid(sshdr)) { | |
4fa83244 DB |
1649 | sd_print_sense_hdr(sdkp, sshdr); |
1650 | ||
464a00c9 HR |
1651 | /* we need to evaluate the error return */ |
1652 | if (sshdr->asc == 0x3a || /* medium not present */ | |
1653 | sshdr->asc == 0x20 || /* invalid command */ | |
1654 | (sshdr->asc == 0x74 && sshdr->ascq == 0x71)) /* drive is password locked */ | |
95897910 ON |
1655 | /* this is no error here */ |
1656 | return 0; | |
464a00c9 | 1657 | } |
95897910 ON |
1658 | |
1659 | switch (host_byte(res)) { | |
1660 | /* ignore errors due to racing a disconnection */ | |
1661 | case DID_BAD_TARGET: | |
1662 | case DID_NO_CONNECT: | |
1663 | return 0; | |
1664 | /* signal the upper layer it might try again */ | |
1665 | case DID_BUS_BUSY: | |
1666 | case DID_IMM_RETRY: | |
1667 | case DID_REQUEUE: | |
1668 | case DID_SOFT_ERROR: | |
1669 | return -EBUSY; | |
1670 | default: | |
1671 | return -EIO; | |
1672 | } | |
1da177e4 | 1673 | } |
3721050a | 1674 | return 0; |
1da177e4 LT |
1675 | } |
1676 | ||
1da177e4 LT |
1677 | static void sd_rescan(struct device *dev) |
1678 | { | |
3d9a1f53 | 1679 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
39b7f1e2 | 1680 | |
b200e38c | 1681 | sd_revalidate_disk(sdkp->disk); |
1da177e4 LT |
1682 | } |
1683 | ||
b83ce214 CH |
1684 | static int sd_get_unique_id(struct gendisk *disk, u8 id[16], |
1685 | enum blk_unique_id type) | |
1686 | { | |
1687 | struct scsi_device *sdev = scsi_disk(disk)->device; | |
1688 | const struct scsi_vpd *vpd; | |
1689 | const unsigned char *d; | |
1690 | int ret = -ENXIO, len; | |
1691 | ||
1692 | rcu_read_lock(); | |
1693 | vpd = rcu_dereference(sdev->vpd_pg83); | |
1694 | if (!vpd) | |
1695 | goto out_unlock; | |
1696 | ||
1697 | ret = -EINVAL; | |
1698 | for (d = vpd->data + 4; d < vpd->data + vpd->len; d += d[3] + 4) { | |
1699 | /* we only care about designators with LU association */ | |
1700 | if (((d[1] >> 4) & 0x3) != 0x00) | |
1701 | continue; | |
1702 | if ((d[1] & 0xf) != type) | |
1703 | continue; | |
1704 | ||
1705 | /* | |
1706 | * Only exit early if a 16-byte descriptor was found. Otherwise | |
1707 | * keep looking as one with more entropy might still show up. | |
1708 | */ | |
1709 | len = d[3]; | |
1710 | if (len != 8 && len != 12 && len != 16) | |
1711 | continue; | |
1712 | ret = len; | |
1713 | memcpy(id, d + 4, len); | |
1714 | if (len == 16) | |
1715 | break; | |
1716 | } | |
1717 | out_unlock: | |
1718 | rcu_read_unlock(); | |
1719 | return ret; | |
1720 | } | |
1721 | ||
04b3c8c0 MC |
1722 | static int sd_scsi_to_pr_err(struct scsi_sense_hdr *sshdr, int result) |
1723 | { | |
1724 | switch (host_byte(result)) { | |
1725 | case DID_TRANSPORT_MARGINAL: | |
1726 | case DID_TRANSPORT_DISRUPTED: | |
1727 | case DID_BUS_BUSY: | |
1728 | return PR_STS_RETRY_PATH_FAILURE; | |
1729 | case DID_NO_CONNECT: | |
1730 | return PR_STS_PATH_FAILED; | |
1731 | case DID_TRANSPORT_FAILFAST: | |
1732 | return PR_STS_PATH_FAST_FAILED; | |
1733 | } | |
1734 | ||
1735 | switch (status_byte(result)) { | |
1736 | case SAM_STAT_RESERVATION_CONFLICT: | |
1737 | return PR_STS_RESERVATION_CONFLICT; | |
1738 | case SAM_STAT_CHECK_CONDITION: | |
1739 | if (!scsi_sense_valid(sshdr)) | |
1740 | return PR_STS_IOERR; | |
1741 | ||
1742 | if (sshdr->sense_key == ILLEGAL_REQUEST && | |
1743 | (sshdr->asc == 0x26 || sshdr->asc == 0x24)) | |
1744 | return -EINVAL; | |
1745 | ||
1746 | fallthrough; | |
1747 | default: | |
1748 | return PR_STS_IOERR; | |
1749 | } | |
1750 | } | |
1751 | ||
0af7b5e2 MC |
1752 | static int sd_pr_in_command(struct block_device *bdev, u8 sa, |
1753 | unsigned char *data, int data_len) | |
1754 | { | |
1755 | struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk); | |
1756 | struct scsi_device *sdev = sdkp->device; | |
1757 | struct scsi_sense_hdr sshdr; | |
1758 | u8 cmd[10] = { PERSISTENT_RESERVE_IN, sa }; | |
1759 | const struct scsi_exec_args exec_args = { | |
1760 | .sshdr = &sshdr, | |
1761 | }; | |
1762 | int result; | |
1763 | ||
1764 | put_unaligned_be16(data_len, &cmd[7]); | |
1765 | ||
1766 | result = scsi_execute_cmd(sdev, cmd, REQ_OP_DRV_IN, data, data_len, | |
1767 | SD_TIMEOUT, sdkp->max_retries, &exec_args); | |
1768 | if (scsi_status_is_check_condition(result) && | |
1769 | scsi_sense_valid(&sshdr)) { | |
1770 | sdev_printk(KERN_INFO, sdev, "PR command failed: %d\n", result); | |
1771 | scsi_print_sense_hdr(sdev, NULL, &sshdr); | |
1772 | } | |
1773 | ||
1774 | if (result <= 0) | |
1775 | return result; | |
1776 | ||
1777 | return sd_scsi_to_pr_err(&sshdr, result); | |
1778 | } | |
1779 | ||
1780 | static int sd_pr_read_keys(struct block_device *bdev, struct pr_keys *keys_info) | |
1781 | { | |
1782 | int result, i, data_offset, num_copy_keys; | |
1783 | u32 num_keys = keys_info->num_keys; | |
1784 | int data_len = num_keys * 8 + 8; | |
1785 | u8 *data; | |
1786 | ||
1787 | data = kzalloc(data_len, GFP_KERNEL); | |
1788 | if (!data) | |
1789 | return -ENOMEM; | |
1790 | ||
1791 | result = sd_pr_in_command(bdev, READ_KEYS, data, data_len); | |
1792 | if (result) | |
1793 | goto free_data; | |
1794 | ||
1795 | keys_info->generation = get_unaligned_be32(&data[0]); | |
1796 | keys_info->num_keys = get_unaligned_be32(&data[4]) / 8; | |
1797 | ||
1798 | data_offset = 8; | |
1799 | num_copy_keys = min(num_keys, keys_info->num_keys); | |
1800 | ||
1801 | for (i = 0; i < num_copy_keys; i++) { | |
1802 | keys_info->keys[i] = get_unaligned_be64(&data[data_offset]); | |
1803 | data_offset += 8; | |
1804 | } | |
1805 | ||
1806 | free_data: | |
1807 | kfree(data); | |
1808 | return result; | |
1809 | } | |
1810 | ||
1811 | static int sd_pr_read_reservation(struct block_device *bdev, | |
1812 | struct pr_held_reservation *rsv) | |
1813 | { | |
1814 | struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk); | |
1815 | struct scsi_device *sdev = sdkp->device; | |
1816 | u8 data[24] = { }; | |
1817 | int result, len; | |
1818 | ||
1819 | result = sd_pr_in_command(bdev, READ_RESERVATION, data, sizeof(data)); | |
1820 | if (result) | |
1821 | return result; | |
1822 | ||
1823 | len = get_unaligned_be32(&data[4]); | |
1824 | if (!len) | |
1825 | return 0; | |
1826 | ||
1827 | /* Make sure we have at least the key and type */ | |
1828 | if (len < 14) { | |
1829 | sdev_printk(KERN_INFO, sdev, | |
1830 | "READ RESERVATION failed due to short return buffer of %d bytes\n", | |
1831 | len); | |
1832 | return -EINVAL; | |
1833 | } | |
1834 | ||
1835 | rsv->generation = get_unaligned_be32(&data[0]); | |
1836 | rsv->key = get_unaligned_be64(&data[8]); | |
1837 | rsv->type = scsi_pr_type_to_block(data[21] & 0x0f); | |
1838 | return 0; | |
1839 | } | |
1840 | ||
0730b163 MC |
1841 | static int sd_pr_out_command(struct block_device *bdev, u8 sa, u64 key, |
1842 | u64 sa_key, enum scsi_pr_type type, u8 flags) | |
924d55b0 | 1843 | { |
0610959f MC |
1844 | struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk); |
1845 | struct scsi_device *sdev = sdkp->device; | |
924d55b0 | 1846 | struct scsi_sense_hdr sshdr; |
af16cd63 MC |
1847 | const struct scsi_exec_args exec_args = { |
1848 | .sshdr = &sshdr, | |
1849 | }; | |
924d55b0 CH |
1850 | int result; |
1851 | u8 cmd[16] = { 0, }; | |
1852 | u8 data[24] = { 0, }; | |
1853 | ||
1854 | cmd[0] = PERSISTENT_RESERVE_OUT; | |
1855 | cmd[1] = sa; | |
1856 | cmd[2] = type; | |
1857 | put_unaligned_be32(sizeof(data), &cmd[5]); | |
1858 | ||
1859 | put_unaligned_be64(key, &data[0]); | |
1860 | put_unaligned_be64(sa_key, &data[8]); | |
1861 | data[20] = flags; | |
1862 | ||
af16cd63 MC |
1863 | result = scsi_execute_cmd(sdev, cmd, REQ_OP_DRV_OUT, &data, |
1864 | sizeof(data), SD_TIMEOUT, sdkp->max_retries, | |
1865 | &exec_args); | |
924d55b0 | 1866 | |
464a00c9 | 1867 | if (scsi_status_is_check_condition(result) && |
c65be1a6 | 1868 | scsi_sense_valid(&sshdr)) { |
924d55b0 CH |
1869 | sdev_printk(KERN_INFO, sdev, "PR command failed: %d\n", result); |
1870 | scsi_print_sense_hdr(sdev, NULL, &sshdr); | |
1871 | } | |
1872 | ||
04b3c8c0 MC |
1873 | if (result <= 0) |
1874 | return result; | |
1875 | ||
1876 | return sd_scsi_to_pr_err(&sshdr, result); | |
924d55b0 CH |
1877 | } |
1878 | ||
1879 | static int sd_pr_register(struct block_device *bdev, u64 old_key, u64 new_key, | |
1880 | u32 flags) | |
1881 | { | |
1882 | if (flags & ~PR_FL_IGNORE_KEY) | |
1883 | return -EOPNOTSUPP; | |
20bebccb | 1884 | return sd_pr_out_command(bdev, (flags & PR_FL_IGNORE_KEY) ? 0x06 : 0x00, |
924d55b0 | 1885 | old_key, new_key, 0, |
01f90dd9 | 1886 | (1 << 0) /* APTPL */); |
924d55b0 CH |
1887 | } |
1888 | ||
1889 | static int sd_pr_reserve(struct block_device *bdev, u64 key, enum pr_type type, | |
1890 | u32 flags) | |
1891 | { | |
1892 | if (flags) | |
1893 | return -EOPNOTSUPP; | |
0730b163 MC |
1894 | return sd_pr_out_command(bdev, 0x01, key, 0, |
1895 | block_pr_type_to_scsi(type), 0); | |
924d55b0 CH |
1896 | } |
1897 | ||
1898 | static int sd_pr_release(struct block_device *bdev, u64 key, enum pr_type type) | |
1899 | { | |
0730b163 MC |
1900 | return sd_pr_out_command(bdev, 0x02, key, 0, |
1901 | block_pr_type_to_scsi(type), 0); | |
924d55b0 CH |
1902 | } |
1903 | ||
1904 | static int sd_pr_preempt(struct block_device *bdev, u64 old_key, u64 new_key, | |
1905 | enum pr_type type, bool abort) | |
1906 | { | |
20bebccb | 1907 | return sd_pr_out_command(bdev, abort ? 0x05 : 0x04, old_key, new_key, |
0730b163 | 1908 | block_pr_type_to_scsi(type), 0); |
924d55b0 CH |
1909 | } |
1910 | ||
1911 | static int sd_pr_clear(struct block_device *bdev, u64 key) | |
1912 | { | |
20bebccb | 1913 | return sd_pr_out_command(bdev, 0x03, key, 0, 0, 0); |
924d55b0 CH |
1914 | } |
1915 | ||
1916 | static const struct pr_ops sd_pr_ops = { | |
1917 | .pr_register = sd_pr_register, | |
1918 | .pr_reserve = sd_pr_reserve, | |
1919 | .pr_release = sd_pr_release, | |
1920 | .pr_preempt = sd_pr_preempt, | |
1921 | .pr_clear = sd_pr_clear, | |
0af7b5e2 MC |
1922 | .pr_read_keys = sd_pr_read_keys, |
1923 | .pr_read_reservation = sd_pr_read_reservation, | |
924d55b0 CH |
1924 | }; |
1925 | ||
9c63f7f6 CH |
1926 | static void scsi_disk_free_disk(struct gendisk *disk) |
1927 | { | |
1928 | struct scsi_disk *sdkp = scsi_disk(disk); | |
1929 | ||
1930 | put_device(&sdkp->disk_dev); | |
1931 | } | |
1932 | ||
83d5cde4 | 1933 | static const struct block_device_operations sd_fops = { |
1da177e4 | 1934 | .owner = THIS_MODULE, |
0338e291 AV |
1935 | .open = sd_open, |
1936 | .release = sd_release, | |
8a6cfeb6 | 1937 | .ioctl = sd_ioctl, |
a885c8c4 | 1938 | .getgeo = sd_getgeo, |
44328310 | 1939 | .compat_ioctl = blkdev_compat_ptr_ioctl, |
2bae0093 | 1940 | .check_events = sd_check_events, |
72ec24bd | 1941 | .unlock_native_capacity = sd_unlock_native_capacity, |
e76239a3 | 1942 | .report_zones = sd_zbc_report_zones, |
b83ce214 | 1943 | .get_unique_id = sd_get_unique_id, |
9c63f7f6 | 1944 | .free_disk = scsi_disk_free_disk, |
924d55b0 | 1945 | .pr_ops = &sd_pr_ops, |
1da177e4 LT |
1946 | }; |
1947 | ||
7a38dc0b HR |
1948 | /** |
1949 | * sd_eh_reset - reset error handling callback | |
1950 | * @scmd: sd-issued command that has failed | |
1951 | * | |
1952 | * This function is called by the SCSI midlayer before starting | |
1953 | * SCSI EH. When counting medium access failures we have to be | |
1954 | * careful to register it only only once per device and SCSI EH run; | |
1955 | * there might be several timed out commands which will cause the | |
1956 | * 'max_medium_access_timeouts' counter to trigger after the first | |
1957 | * SCSI EH run already and set the device to offline. | |
1958 | * So this function resets the internal counter before starting SCSI EH. | |
1959 | **/ | |
1960 | static void sd_eh_reset(struct scsi_cmnd *scmd) | |
1961 | { | |
f3fa33ac | 1962 | struct scsi_disk *sdkp = scsi_disk(scsi_cmd_to_rq(scmd)->q->disk); |
7a38dc0b HR |
1963 | |
1964 | /* New SCSI EH run, reset gate variable */ | |
1965 | sdkp->ignore_medium_access_errors = false; | |
1966 | } | |
1967 | ||
18a4d0a2 MP |
1968 | /** |
1969 | * sd_eh_action - error handling callback | |
1970 | * @scmd: sd-issued command that has failed | |
18a4d0a2 MP |
1971 | * @eh_disp: The recovery disposition suggested by the midlayer |
1972 | * | |
2451079b JB |
1973 | * This function is called by the SCSI midlayer upon completion of an |
1974 | * error test command (currently TEST UNIT READY). The result of sending | |
1975 | * the eh command is passed in eh_disp. We're looking for devices that | |
1976 | * fail medium access commands but are OK with non access commands like | |
1977 | * test unit ready (so wrongly see the device as having a successful | |
1978 | * recovery) | |
18a4d0a2 | 1979 | **/ |
2451079b | 1980 | static int sd_eh_action(struct scsi_cmnd *scmd, int eh_disp) |
18a4d0a2 | 1981 | { |
f3fa33ac | 1982 | struct scsi_disk *sdkp = scsi_disk(scsi_cmd_to_rq(scmd)->q->disk); |
0db6ca8a | 1983 | struct scsi_device *sdev = scmd->device; |
18a4d0a2 | 1984 | |
0db6ca8a | 1985 | if (!scsi_device_online(sdev) || |
2451079b JB |
1986 | !scsi_medium_access_command(scmd) || |
1987 | host_byte(scmd->result) != DID_TIME_OUT || | |
1988 | eh_disp != SUCCESS) | |
18a4d0a2 MP |
1989 | return eh_disp; |
1990 | ||
1991 | /* | |
1992 | * The device has timed out executing a medium access command. | |
1993 | * However, the TEST UNIT READY command sent during error | |
1994 | * handling completed successfully. Either the device is in the | |
1995 | * process of recovering or has it suffered an internal failure | |
1996 | * that prevents access to the storage medium. | |
1997 | */ | |
7a38dc0b HR |
1998 | if (!sdkp->ignore_medium_access_errors) { |
1999 | sdkp->medium_access_timed_out++; | |
2000 | sdkp->ignore_medium_access_errors = true; | |
2001 | } | |
18a4d0a2 MP |
2002 | |
2003 | /* | |
2004 | * If the device keeps failing read/write commands but TEST UNIT | |
2005 | * READY always completes successfully we assume that medium | |
2006 | * access is no longer possible and take the device offline. | |
2007 | */ | |
2008 | if (sdkp->medium_access_timed_out >= sdkp->max_medium_access_timeouts) { | |
2009 | scmd_printk(KERN_ERR, scmd, | |
2010 | "Medium access timeout failure. Offlining disk!\n"); | |
0db6ca8a BVA |
2011 | mutex_lock(&sdev->state_mutex); |
2012 | scsi_device_set_state(sdev, SDEV_OFFLINE); | |
2013 | mutex_unlock(&sdev->state_mutex); | |
18a4d0a2 | 2014 | |
e8f8d50e | 2015 | return SUCCESS; |
18a4d0a2 MP |
2016 | } |
2017 | ||
2018 | return eh_disp; | |
2019 | } | |
2020 | ||
af55ff67 MP |
2021 | static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd) |
2022 | { | |
5999ccff | 2023 | struct request *req = scsi_cmd_to_rq(scmd); |
6eadc612 DLM |
2024 | struct scsi_device *sdev = scmd->device; |
2025 | unsigned int transferred, good_bytes; | |
2026 | u64 start_lba, end_lba, bad_lba; | |
2027 | ||
a8733c7b | 2028 | /* |
6eadc612 DLM |
2029 | * Some commands have a payload smaller than the device logical |
2030 | * block size (e.g. INQUIRY on a 4K disk). | |
a8733c7b | 2031 | */ |
6eadc612 | 2032 | if (scsi_bufflen(scmd) <= sdev->sector_size) |
af55ff67 MP |
2033 | return 0; |
2034 | ||
6eadc612 DLM |
2035 | /* Check if we have a 'bad_lba' information */ |
2036 | if (!scsi_get_sense_info_fld(scmd->sense_buffer, | |
2037 | SCSI_SENSE_BUFFERSIZE, | |
2038 | &bad_lba)) | |
af55ff67 MP |
2039 | return 0; |
2040 | ||
6eadc612 DLM |
2041 | /* |
2042 | * If the bad lba was reported incorrectly, we have no idea where | |
af55ff67 MP |
2043 | * the error is. |
2044 | */ | |
6eadc612 DLM |
2045 | start_lba = sectors_to_logical(sdev, blk_rq_pos(req)); |
2046 | end_lba = start_lba + bytes_to_logical(sdev, scsi_bufflen(scmd)); | |
2047 | if (bad_lba < start_lba || bad_lba >= end_lba) | |
af55ff67 MP |
2048 | return 0; |
2049 | ||
6eadc612 DLM |
2050 | /* |
2051 | * resid is optional but mostly filled in. When it's unused, | |
2052 | * its value is zero, so we assume the whole buffer transferred | |
af55ff67 | 2053 | */ |
6eadc612 DLM |
2054 | transferred = scsi_bufflen(scmd) - scsi_get_resid(scmd); |
2055 | ||
2056 | /* This computation should always be done in terms of the | |
2057 | * resolution of the device's medium. | |
af55ff67 | 2058 | */ |
6eadc612 DLM |
2059 | good_bytes = logical_to_bytes(sdev, bad_lba - start_lba); |
2060 | ||
a8733c7b | 2061 | return min(good_bytes, transferred); |
af55ff67 MP |
2062 | } |
2063 | ||
1da177e4 | 2064 | /** |
7b3d9545 | 2065 | * sd_done - bottom half handler: called when the lower level |
1da177e4 LT |
2066 | * driver has completed (successfully or otherwise) a scsi command. |
2067 | * @SCpnt: mid-level's per command structure. | |
2068 | * | |
2069 | * Note: potentially run from within an ISR. Must not block. | |
2070 | **/ | |
7b3d9545 | 2071 | static int sd_done(struct scsi_cmnd *SCpnt) |
1da177e4 LT |
2072 | { |
2073 | int result = SCpnt->result; | |
af55ff67 | 2074 | unsigned int good_bytes = result ? 0 : scsi_bufflen(SCpnt); |
c46f0917 DLM |
2075 | unsigned int sector_size = SCpnt->device->sector_size; |
2076 | unsigned int resid; | |
1da177e4 | 2077 | struct scsi_sense_hdr sshdr; |
5999ccff | 2078 | struct request *req = scsi_cmd_to_rq(SCpnt); |
f3fa33ac | 2079 | struct scsi_disk *sdkp = scsi_disk(req->q->disk); |
1da177e4 LT |
2080 | int sense_valid = 0; |
2081 | int sense_deferred = 0; | |
1da177e4 | 2082 | |
89d94756 HR |
2083 | switch (req_op(req)) { |
2084 | case REQ_OP_DISCARD: | |
02d26103 | 2085 | case REQ_OP_WRITE_ZEROES: |
89d94756 | 2086 | case REQ_OP_ZONE_RESET: |
d81e9d49 | 2087 | case REQ_OP_ZONE_RESET_ALL: |
ad512f20 AJ |
2088 | case REQ_OP_ZONE_OPEN: |
2089 | case REQ_OP_ZONE_CLOSE: | |
2090 | case REQ_OP_ZONE_FINISH: | |
26e85fcd MP |
2091 | if (!result) { |
2092 | good_bytes = blk_rq_bytes(req); | |
2093 | scsi_set_resid(SCpnt, 0); | |
2094 | } else { | |
2095 | good_bytes = 0; | |
2096 | scsi_set_resid(SCpnt, blk_rq_bytes(req)); | |
89d94756 HR |
2097 | } |
2098 | break; | |
c46f0917 DLM |
2099 | default: |
2100 | /* | |
2101 | * In case of bogus fw or device, we could end up having | |
2102 | * an unaligned partial completion. Check this here and force | |
2103 | * alignment. | |
2104 | */ | |
2105 | resid = scsi_get_resid(SCpnt); | |
2106 | if (resid & (sector_size - 1)) { | |
2107 | sd_printk(KERN_INFO, sdkp, | |
2108 | "Unaligned partial completion (resid=%u, sector_sz=%u)\n", | |
2109 | resid, sector_size); | |
670d8be2 | 2110 | scsi_print_command(SCpnt); |
c46f0917 DLM |
2111 | resid = min(scsi_bufflen(SCpnt), |
2112 | round_up(resid, sector_size)); | |
2113 | scsi_set_resid(SCpnt, resid); | |
2114 | } | |
26e85fcd | 2115 | } |
6a32a8ae | 2116 | |
1da177e4 LT |
2117 | if (result) { |
2118 | sense_valid = scsi_command_normalize_sense(SCpnt, &sshdr); | |
2119 | if (sense_valid) | |
2120 | sense_deferred = scsi_sense_is_deferred(&sshdr); | |
2121 | } | |
2a863ba8 DJ |
2122 | sdkp->medium_access_timed_out = 0; |
2123 | ||
464a00c9 | 2124 | if (!scsi_status_is_check_condition(result) && |
03aba2f7 LT |
2125 | (!sense_valid || sense_deferred)) |
2126 | goto out; | |
2127 | ||
2128 | switch (sshdr.sense_key) { | |
2129 | case HARDWARE_ERROR: | |
2130 | case MEDIUM_ERROR: | |
af55ff67 | 2131 | good_bytes = sd_completed_bytes(SCpnt); |
03aba2f7 LT |
2132 | break; |
2133 | case RECOVERED_ERROR: | |
af55ff67 MP |
2134 | good_bytes = scsi_bufflen(SCpnt); |
2135 | break; | |
10dab226 JW |
2136 | case NO_SENSE: |
2137 | /* This indicates a false check condition, so ignore it. An | |
2138 | * unknown amount of data was transferred so treat it as an | |
2139 | * error. | |
2140 | */ | |
10dab226 JW |
2141 | SCpnt->result = 0; |
2142 | memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); | |
2143 | break; | |
c98a0eb0 MP |
2144 | case ABORTED_COMMAND: |
2145 | if (sshdr.asc == 0x10) /* DIF: Target detected corruption */ | |
2146 | good_bytes = sd_completed_bytes(SCpnt); | |
2147 | break; | |
2148 | case ILLEGAL_REQUEST: | |
d227ec26 CH |
2149 | switch (sshdr.asc) { |
2150 | case 0x10: /* DIX: Host detected corruption */ | |
af55ff67 | 2151 | good_bytes = sd_completed_bytes(SCpnt); |
d227ec26 CH |
2152 | break; |
2153 | case 0x20: /* INVALID COMMAND OPCODE */ | |
2154 | case 0x24: /* INVALID FIELD IN CDB */ | |
2155 | switch (SCpnt->cmnd[0]) { | |
5db44863 MP |
2156 | case UNMAP: |
2157 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
2158 | break; | |
2159 | case WRITE_SAME_16: | |
2160 | case WRITE_SAME: | |
d227ec26 | 2161 | if (SCpnt->cmnd[1] & 8) { /* UNMAP */ |
5db44863 | 2162 | sd_config_discard(sdkp, SD_LBP_DISABLE); |
d227ec26 | 2163 | } else { |
5db44863 MP |
2164 | sdkp->device->no_write_same = 1; |
2165 | sd_config_write_same(sdkp); | |
e8064021 | 2166 | req->rq_flags |= RQF_QUIET; |
5db44863 | 2167 | } |
d227ec26 | 2168 | break; |
5db44863 MP |
2169 | } |
2170 | } | |
03aba2f7 LT |
2171 | break; |
2172 | default: | |
2173 | break; | |
1da177e4 | 2174 | } |
89d94756 | 2175 | |
03aba2f7 | 2176 | out: |
89d94756 | 2177 | if (sd_is_zoned(sdkp)) |
5795eb44 | 2178 | good_bytes = sd_zbc_complete(SCpnt, good_bytes, &sshdr); |
89d94756 | 2179 | |
ef61329d HR |
2180 | SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO, SCpnt, |
2181 | "sd_done: completed %d of %d bytes\n", | |
2182 | good_bytes, scsi_bufflen(SCpnt))); | |
2183 | ||
7b3d9545 | 2184 | return good_bytes; |
1da177e4 LT |
2185 | } |
2186 | ||
1da177e4 LT |
2187 | /* |
2188 | * spinup disk - called only in sd_revalidate_disk() | |
2189 | */ | |
2190 | static void | |
e73aec82 | 2191 | sd_spinup_disk(struct scsi_disk *sdkp) |
ea73a9f2 | 2192 | { |
1da177e4 | 2193 | unsigned char cmd[10]; |
4451e472 | 2194 | unsigned long spintime_expire = 0; |
1da177e4 LT |
2195 | int retries, spintime; |
2196 | unsigned int the_result; | |
2197 | struct scsi_sense_hdr sshdr; | |
af16cd63 MC |
2198 | const struct scsi_exec_args exec_args = { |
2199 | .sshdr = &sshdr, | |
2200 | }; | |
1da177e4 LT |
2201 | int sense_valid = 0; |
2202 | ||
2203 | spintime = 0; | |
2204 | ||
2205 | /* Spin up drives, as required. Only do this at boot time */ | |
2206 | /* Spinup needs to be done for module loads too. */ | |
2207 | do { | |
2208 | retries = 0; | |
2209 | ||
2210 | do { | |
4521428c HK |
2211 | bool media_was_present = sdkp->media_present; |
2212 | ||
1da177e4 LT |
2213 | cmd[0] = TEST_UNIT_READY; |
2214 | memset((void *) &cmd[1], 0, 9); | |
2215 | ||
af16cd63 MC |
2216 | the_result = scsi_execute_cmd(sdkp->device, cmd, |
2217 | REQ_OP_DRV_IN, NULL, 0, | |
2218 | SD_TIMEOUT, | |
2219 | sdkp->max_retries, | |
2220 | &exec_args); | |
1da177e4 | 2221 | |
b4d38e38 AS |
2222 | /* |
2223 | * If the drive has indicated to us that it | |
2224 | * doesn't have any media in it, don't bother | |
2225 | * with any more polling. | |
2226 | */ | |
848ade90 | 2227 | if (media_not_present(sdkp, &sshdr)) { |
4521428c HK |
2228 | if (media_was_present) |
2229 | sd_printk(KERN_NOTICE, sdkp, "Media removed, stopped polling\n"); | |
b4d38e38 | 2230 | return; |
848ade90 | 2231 | } |
b4d38e38 | 2232 | |
1da177e4 | 2233 | if (the_result) |
ea73a9f2 | 2234 | sense_valid = scsi_sense_valid(&sshdr); |
1da177e4 | 2235 | retries++; |
464a00c9 | 2236 | } while (retries < 3 && |
1da177e4 | 2237 | (!scsi_status_is_good(the_result) || |
464a00c9 | 2238 | (scsi_status_is_check_condition(the_result) && |
1da177e4 LT |
2239 | sense_valid && sshdr.sense_key == UNIT_ATTENTION))); |
2240 | ||
464a00c9 | 2241 | if (!scsi_status_is_check_condition(the_result)) { |
1da177e4 LT |
2242 | /* no sense, TUR either succeeded or failed |
2243 | * with a status error */ | |
e73aec82 | 2244 | if(!spintime && !scsi_status_is_good(the_result)) { |
ef61329d HR |
2245 | sd_print_result(sdkp, "Test Unit Ready failed", |
2246 | the_result); | |
e73aec82 | 2247 | } |
1da177e4 LT |
2248 | break; |
2249 | } | |
ef61329d | 2250 | |
1da177e4 LT |
2251 | /* |
2252 | * The device does not want the automatic start to be issued. | |
2253 | */ | |
33dd6f92 | 2254 | if (sdkp->device->no_start_on_add) |
1da177e4 | 2255 | break; |
1da177e4 | 2256 | |
33dd6f92 MW |
2257 | if (sense_valid && sshdr.sense_key == NOT_READY) { |
2258 | if (sshdr.asc == 4 && sshdr.ascq == 3) | |
2259 | break; /* manual intervention required */ | |
2260 | if (sshdr.asc == 4 && sshdr.ascq == 0xb) | |
2261 | break; /* standby */ | |
2262 | if (sshdr.asc == 4 && sshdr.ascq == 0xc) | |
2263 | break; /* unavailable */ | |
505aa4b6 MR |
2264 | if (sshdr.asc == 4 && sshdr.ascq == 0x1b) |
2265 | break; /* sanitize in progress */ | |
33dd6f92 MW |
2266 | /* |
2267 | * Issue command to spin up drive when not ready | |
2268 | */ | |
1da177e4 | 2269 | if (!spintime) { |
e73aec82 | 2270 | sd_printk(KERN_NOTICE, sdkp, "Spinning up disk..."); |
1da177e4 LT |
2271 | cmd[0] = START_STOP; |
2272 | cmd[1] = 1; /* Return immediately */ | |
2273 | memset((void *) &cmd[2], 0, 8); | |
2274 | cmd[4] = 1; /* Start spin cycle */ | |
d2886ea3 SR |
2275 | if (sdkp->device->start_stop_pwr_cond) |
2276 | cmd[4] |= 1 << 4; | |
af16cd63 MC |
2277 | scsi_execute_cmd(sdkp->device, cmd, |
2278 | REQ_OP_DRV_IN, NULL, 0, | |
0610959f | 2279 | SD_TIMEOUT, sdkp->max_retries, |
af16cd63 | 2280 | &exec_args); |
4451e472 AS |
2281 | spintime_expire = jiffies + 100 * HZ; |
2282 | spintime = 1; | |
1da177e4 | 2283 | } |
1da177e4 LT |
2284 | /* Wait 1 second for next try */ |
2285 | msleep(1000); | |
3a1d0783 | 2286 | printk(KERN_CONT "."); |
4451e472 AS |
2287 | |
2288 | /* | |
2289 | * Wait for USB flash devices with slow firmware. | |
2290 | * Yes, this sense key/ASC combination shouldn't | |
2291 | * occur here. It's characteristic of these devices. | |
2292 | */ | |
2293 | } else if (sense_valid && | |
2294 | sshdr.sense_key == UNIT_ATTENTION && | |
2295 | sshdr.asc == 0x28) { | |
2296 | if (!spintime) { | |
2297 | spintime_expire = jiffies + 5 * HZ; | |
2298 | spintime = 1; | |
2299 | } | |
2300 | /* Wait 1 second for next try */ | |
2301 | msleep(1000); | |
1da177e4 LT |
2302 | } else { |
2303 | /* we don't understand the sense code, so it's | |
2304 | * probably pointless to loop */ | |
2305 | if(!spintime) { | |
e73aec82 MP |
2306 | sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n"); |
2307 | sd_print_sense_hdr(sdkp, &sshdr); | |
1da177e4 LT |
2308 | } |
2309 | break; | |
2310 | } | |
2311 | ||
4451e472 | 2312 | } while (spintime && time_before_eq(jiffies, spintime_expire)); |
1da177e4 LT |
2313 | |
2314 | if (spintime) { | |
2315 | if (scsi_status_is_good(the_result)) | |
3a1d0783 | 2316 | printk(KERN_CONT "ready\n"); |
1da177e4 | 2317 | else |
3a1d0783 | 2318 | printk(KERN_CONT "not responding...\n"); |
1da177e4 LT |
2319 | } |
2320 | } | |
2321 | ||
e0597d70 MP |
2322 | /* |
2323 | * Determine whether disk supports Data Integrity Field. | |
2324 | */ | |
fe542396 | 2325 | static int sd_read_protection_type(struct scsi_disk *sdkp, unsigned char *buffer) |
e0597d70 MP |
2326 | { |
2327 | struct scsi_device *sdp = sdkp->device; | |
2328 | u8 type; | |
2329 | ||
465f4eda XC |
2330 | if (scsi_device_protection(sdp) == 0 || (buffer[12] & 1) == 0) { |
2331 | sdkp->protection_type = 0; | |
1e029397 | 2332 | return 0; |
465f4eda | 2333 | } |
35e1a5d9 MP |
2334 | |
2335 | type = ((buffer[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */ | |
2336 | ||
1e029397 MP |
2337 | if (type > T10_PI_TYPE3_PROTECTION) { |
2338 | sd_printk(KERN_ERR, sdkp, "formatted with unsupported" \ | |
2339 | " protection type %u. Disabling disk!\n", | |
2340 | type); | |
2341 | sdkp->protection_type = 0; | |
2342 | return -ENODEV; | |
2343 | } | |
e0597d70 | 2344 | |
be922f47 MP |
2345 | sdkp->protection_type = type; |
2346 | ||
1e029397 MP |
2347 | return 0; |
2348 | } | |
2349 | ||
2350 | static void sd_config_protection(struct scsi_disk *sdkp) | |
2351 | { | |
2352 | struct scsi_device *sdp = sdkp->device; | |
2353 | ||
1e029397 MP |
2354 | sd_dif_config_host(sdkp); |
2355 | ||
2356 | if (!sdkp->protection_type) | |
2357 | return; | |
2358 | ||
2359 | if (!scsi_host_dif_capable(sdp->host, sdkp->protection_type)) { | |
26a02d97 XY |
2360 | sd_first_printk(KERN_NOTICE, sdkp, |
2361 | "Disabling DIF Type %u protection\n", | |
2362 | sdkp->protection_type); | |
1e029397 MP |
2363 | sdkp->protection_type = 0; |
2364 | } | |
2365 | ||
26a02d97 XY |
2366 | sd_first_printk(KERN_NOTICE, sdkp, "Enabling DIF Type %u protection\n", |
2367 | sdkp->protection_type); | |
e0597d70 MP |
2368 | } |
2369 | ||
0da205e0 MW |
2370 | static void read_capacity_error(struct scsi_disk *sdkp, struct scsi_device *sdp, |
2371 | struct scsi_sense_hdr *sshdr, int sense_valid, | |
2372 | int the_result) | |
2373 | { | |
464a00c9 | 2374 | if (sense_valid) |
0da205e0 MW |
2375 | sd_print_sense_hdr(sdkp, sshdr); |
2376 | else | |
2377 | sd_printk(KERN_NOTICE, sdkp, "Sense not available.\n"); | |
2378 | ||
2379 | /* | |
2380 | * Set dirty bit for removable devices if not ready - | |
2381 | * sometimes drives will not report this properly. | |
2382 | */ | |
2383 | if (sdp->removable && | |
2384 | sense_valid && sshdr->sense_key == NOT_READY) | |
2bae0093 | 2385 | set_media_not_present(sdkp); |
0da205e0 MW |
2386 | |
2387 | /* | |
2388 | * We used to set media_present to 0 here to indicate no media | |
2389 | * in the drive, but some drives fail read capacity even with | |
2390 | * media present, so we can't do that. | |
2391 | */ | |
2392 | sdkp->capacity = 0; /* unknown mapped to zero - as usual */ | |
2393 | } | |
2394 | ||
2395 | #define RC16_LEN 32 | |
2396 | #if RC16_LEN > SD_BUF_SIZE | |
2397 | #error RC16_LEN must not be more than SD_BUF_SIZE | |
2398 | #endif | |
2399 | ||
3233ac19 JB |
2400 | #define READ_CAPACITY_RETRIES_ON_RESET 10 |
2401 | ||
0da205e0 MW |
2402 | static int read_capacity_16(struct scsi_disk *sdkp, struct scsi_device *sdp, |
2403 | unsigned char *buffer) | |
ea73a9f2 | 2404 | { |
1da177e4 | 2405 | unsigned char cmd[16]; |
1da177e4 | 2406 | struct scsi_sense_hdr sshdr; |
af16cd63 MC |
2407 | const struct scsi_exec_args exec_args = { |
2408 | .sshdr = &sshdr, | |
2409 | }; | |
1da177e4 | 2410 | int sense_valid = 0; |
0da205e0 | 2411 | int the_result; |
3233ac19 | 2412 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
ea09bcc9 | 2413 | unsigned int alignment; |
0da205e0 MW |
2414 | unsigned long long lba; |
2415 | unsigned sector_size; | |
1da177e4 | 2416 | |
5ce524bd HG |
2417 | if (sdp->no_read_capacity_16) |
2418 | return -EINVAL; | |
2419 | ||
1da177e4 | 2420 | do { |
0da205e0 | 2421 | memset(cmd, 0, 16); |
eb846d9f | 2422 | cmd[0] = SERVICE_ACTION_IN_16; |
0da205e0 MW |
2423 | cmd[1] = SAI_READ_CAPACITY_16; |
2424 | cmd[13] = RC16_LEN; | |
2425 | memset(buffer, 0, RC16_LEN); | |
2426 | ||
af16cd63 MC |
2427 | the_result = scsi_execute_cmd(sdp, cmd, REQ_OP_DRV_IN, |
2428 | buffer, RC16_LEN, SD_TIMEOUT, | |
2429 | sdkp->max_retries, &exec_args); | |
1da177e4 | 2430 | |
ea73a9f2 | 2431 | if (media_not_present(sdkp, &sshdr)) |
0da205e0 | 2432 | return -ENODEV; |
1da177e4 | 2433 | |
ced202f7 | 2434 | if (the_result > 0) { |
ea73a9f2 | 2435 | sense_valid = scsi_sense_valid(&sshdr); |
2b301307 MW |
2436 | if (sense_valid && |
2437 | sshdr.sense_key == ILLEGAL_REQUEST && | |
2438 | (sshdr.asc == 0x20 || sshdr.asc == 0x24) && | |
2439 | sshdr.ascq == 0x00) | |
2440 | /* Invalid Command Operation Code or | |
2441 | * Invalid Field in CDB, just retry | |
2442 | * silently with RC10 */ | |
2443 | return -EINVAL; | |
3233ac19 JB |
2444 | if (sense_valid && |
2445 | sshdr.sense_key == UNIT_ATTENTION && | |
2446 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) | |
2447 | /* Device reset might occur several times, | |
2448 | * give it one more chance */ | |
2449 | if (--reset_retries > 0) | |
2450 | continue; | |
2b301307 | 2451 | } |
1da177e4 LT |
2452 | retries--; |
2453 | ||
2454 | } while (the_result && retries); | |
2455 | ||
0da205e0 | 2456 | if (the_result) { |
ef61329d | 2457 | sd_print_result(sdkp, "Read Capacity(16) failed", the_result); |
0da205e0 MW |
2458 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); |
2459 | return -EINVAL; | |
2460 | } | |
e73aec82 | 2461 | |
8f76d151 DH |
2462 | sector_size = get_unaligned_be32(&buffer[8]); |
2463 | lba = get_unaligned_be64(&buffer[0]); | |
0da205e0 | 2464 | |
fe542396 MP |
2465 | if (sd_read_protection_type(sdkp, buffer) < 0) { |
2466 | sdkp->capacity = 0; | |
2467 | return -ENODEV; | |
2468 | } | |
0da205e0 | 2469 | |
ea09bcc9 | 2470 | /* Logical blocks per physical block exponent */ |
526f7c79 | 2471 | sdkp->physical_block_size = (1 << (buffer[13] & 0xf)) * sector_size; |
ea09bcc9 | 2472 | |
89d94756 HR |
2473 | /* RC basis */ |
2474 | sdkp->rc_basis = (buffer[12] >> 4) & 0x3; | |
2475 | ||
ea09bcc9 MP |
2476 | /* Lowest aligned logical block */ |
2477 | alignment = ((buffer[14] & 0x3f) << 8 | buffer[15]) * sector_size; | |
2478 | blk_queue_alignment_offset(sdp->request_queue, alignment); | |
2479 | if (alignment && sdkp->first_scan) | |
2480 | sd_printk(KERN_NOTICE, sdkp, | |
2481 | "physical block alignment offset: %u\n", alignment); | |
2482 | ||
c98a0eb0 MP |
2483 | if (buffer[14] & 0x80) { /* LBPME */ |
2484 | sdkp->lbpme = 1; | |
e339c1a7 | 2485 | |
c98a0eb0 MP |
2486 | if (buffer[14] & 0x40) /* LBPRZ */ |
2487 | sdkp->lbprz = 1; | |
e339c1a7 | 2488 | |
c98a0eb0 | 2489 | sd_config_discard(sdkp, SD_LBP_WS16); |
e339c1a7 MP |
2490 | } |
2491 | ||
0da205e0 MW |
2492 | sdkp->capacity = lba + 1; |
2493 | return sector_size; | |
2494 | } | |
2495 | ||
2496 | static int read_capacity_10(struct scsi_disk *sdkp, struct scsi_device *sdp, | |
2497 | unsigned char *buffer) | |
2498 | { | |
2499 | unsigned char cmd[16]; | |
2500 | struct scsi_sense_hdr sshdr; | |
af16cd63 MC |
2501 | const struct scsi_exec_args exec_args = { |
2502 | .sshdr = &sshdr, | |
2503 | }; | |
0da205e0 MW |
2504 | int sense_valid = 0; |
2505 | int the_result; | |
3233ac19 | 2506 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
0da205e0 MW |
2507 | sector_t lba; |
2508 | unsigned sector_size; | |
2509 | ||
2510 | do { | |
2511 | cmd[0] = READ_CAPACITY; | |
2512 | memset(&cmd[1], 0, 9); | |
2513 | memset(buffer, 0, 8); | |
2514 | ||
af16cd63 MC |
2515 | the_result = scsi_execute_cmd(sdp, cmd, REQ_OP_DRV_IN, buffer, |
2516 | 8, SD_TIMEOUT, sdkp->max_retries, | |
2517 | &exec_args); | |
0da205e0 MW |
2518 | |
2519 | if (media_not_present(sdkp, &sshdr)) | |
2520 | return -ENODEV; | |
2521 | ||
ced202f7 | 2522 | if (the_result > 0) { |
0da205e0 | 2523 | sense_valid = scsi_sense_valid(&sshdr); |
3233ac19 JB |
2524 | if (sense_valid && |
2525 | sshdr.sense_key == UNIT_ATTENTION && | |
2526 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) | |
2527 | /* Device reset might occur several times, | |
2528 | * give it one more chance */ | |
2529 | if (--reset_retries > 0) | |
2530 | continue; | |
2531 | } | |
0da205e0 MW |
2532 | retries--; |
2533 | ||
2534 | } while (the_result && retries); | |
2535 | ||
2536 | if (the_result) { | |
ef61329d | 2537 | sd_print_result(sdkp, "Read Capacity(10) failed", the_result); |
0da205e0 MW |
2538 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); |
2539 | return -EINVAL; | |
2540 | } | |
2541 | ||
8f76d151 DH |
2542 | sector_size = get_unaligned_be32(&buffer[4]); |
2543 | lba = get_unaligned_be32(&buffer[0]); | |
0da205e0 | 2544 | |
5ce524bd HG |
2545 | if (sdp->no_read_capacity_16 && (lba == 0xffffffff)) { |
2546 | /* Some buggy (usb cardreader) devices return an lba of | |
2547 | 0xffffffff when the want to report a size of 0 (with | |
2548 | which they really mean no media is present) */ | |
2549 | sdkp->capacity = 0; | |
5cc10350 | 2550 | sdkp->physical_block_size = sector_size; |
5ce524bd HG |
2551 | return sector_size; |
2552 | } | |
2553 | ||
0da205e0 | 2554 | sdkp->capacity = lba + 1; |
526f7c79 | 2555 | sdkp->physical_block_size = sector_size; |
0da205e0 MW |
2556 | return sector_size; |
2557 | } | |
2558 | ||
2b301307 MW |
2559 | static int sd_try_rc16_first(struct scsi_device *sdp) |
2560 | { | |
f87146bb HR |
2561 | if (sdp->host->max_cmd_len < 16) |
2562 | return 0; | |
6a0bdffa AS |
2563 | if (sdp->try_rc_10_first) |
2564 | return 0; | |
2b301307 MW |
2565 | if (sdp->scsi_level > SCSI_SPC_2) |
2566 | return 1; | |
2567 | if (scsi_device_protection(sdp)) | |
2568 | return 1; | |
2569 | return 0; | |
2570 | } | |
2571 | ||
0da205e0 MW |
2572 | /* |
2573 | * read disk capacity | |
2574 | */ | |
2575 | static void | |
2576 | sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer) | |
2577 | { | |
2578 | int sector_size; | |
2579 | struct scsi_device *sdp = sdkp->device; | |
2580 | ||
2b301307 | 2581 | if (sd_try_rc16_first(sdp)) { |
0da205e0 MW |
2582 | sector_size = read_capacity_16(sdkp, sdp, buffer); |
2583 | if (sector_size == -EOVERFLOW) | |
1da177e4 | 2584 | goto got_data; |
2b301307 MW |
2585 | if (sector_size == -ENODEV) |
2586 | return; | |
2587 | if (sector_size < 0) | |
2588 | sector_size = read_capacity_10(sdkp, sdp, buffer); | |
0da205e0 MW |
2589 | if (sector_size < 0) |
2590 | return; | |
1da177e4 | 2591 | } else { |
0da205e0 MW |
2592 | sector_size = read_capacity_10(sdkp, sdp, buffer); |
2593 | if (sector_size == -EOVERFLOW) | |
2594 | goto got_data; | |
2595 | if (sector_size < 0) | |
2596 | return; | |
2597 | if ((sizeof(sdkp->capacity) > 4) && | |
2598 | (sdkp->capacity > 0xffffffffULL)) { | |
2599 | int old_sector_size = sector_size; | |
2600 | sd_printk(KERN_NOTICE, sdkp, "Very big device. " | |
2601 | "Trying to use READ CAPACITY(16).\n"); | |
2602 | sector_size = read_capacity_16(sdkp, sdp, buffer); | |
2603 | if (sector_size < 0) { | |
2604 | sd_printk(KERN_NOTICE, sdkp, | |
2605 | "Using 0xffffffff as device size\n"); | |
2606 | sdkp->capacity = 1 + (sector_t) 0xffffffff; | |
2607 | sector_size = old_sector_size; | |
2608 | goto got_data; | |
2609 | } | |
597d7400 MP |
2610 | /* Remember that READ CAPACITY(16) succeeded */ |
2611 | sdp->try_rc_10_first = 0; | |
0da205e0 MW |
2612 | } |
2613 | } | |
1da177e4 | 2614 | |
5c211caa AS |
2615 | /* Some devices are known to return the total number of blocks, |
2616 | * not the highest block number. Some devices have versions | |
2617 | * which do this and others which do not. Some devices we might | |
2618 | * suspect of doing this but we don't know for certain. | |
2619 | * | |
2620 | * If we know the reported capacity is wrong, decrement it. If | |
2621 | * we can only guess, then assume the number of blocks is even | |
2622 | * (usually true but not always) and err on the side of lowering | |
2623 | * the capacity. | |
2624 | */ | |
2625 | if (sdp->fix_capacity || | |
2626 | (sdp->guess_capacity && (sdkp->capacity & 0x01))) { | |
2627 | sd_printk(KERN_INFO, sdkp, "Adjusting the sector count " | |
2628 | "from its reported value: %llu\n", | |
2629 | (unsigned long long) sdkp->capacity); | |
1da177e4 | 2630 | --sdkp->capacity; |
61bf54b7 ON |
2631 | } |
2632 | ||
1da177e4 LT |
2633 | got_data: |
2634 | if (sector_size == 0) { | |
2635 | sector_size = 512; | |
e73aec82 MP |
2636 | sd_printk(KERN_NOTICE, sdkp, "Sector size 0 reported, " |
2637 | "assuming 512.\n"); | |
1da177e4 LT |
2638 | } |
2639 | ||
2640 | if (sector_size != 512 && | |
2641 | sector_size != 1024 && | |
2642 | sector_size != 2048 && | |
74856fbf | 2643 | sector_size != 4096) { |
e73aec82 MP |
2644 | sd_printk(KERN_NOTICE, sdkp, "Unsupported sector size %d.\n", |
2645 | sector_size); | |
1da177e4 LT |
2646 | /* |
2647 | * The user might want to re-format the drive with | |
2648 | * a supported sectorsize. Once this happens, it | |
2649 | * would be relatively trivial to set the thing up. | |
2650 | * For this reason, we leave the thing in the table. | |
2651 | */ | |
2652 | sdkp->capacity = 0; | |
2653 | /* | |
2654 | * set a bogus sector size so the normal read/write | |
2655 | * logic in the block layer will eventually refuse any | |
2656 | * request on this device without tripping over power | |
2657 | * of two sector size assumptions | |
2658 | */ | |
2659 | sector_size = 512; | |
2660 | } | |
e1defc4f | 2661 | blk_queue_logical_block_size(sdp->request_queue, sector_size); |
89d94756 HR |
2662 | blk_queue_physical_block_size(sdp->request_queue, |
2663 | sdkp->physical_block_size); | |
2664 | sdkp->device->sector_size = sector_size; | |
7404ad3b | 2665 | |
89d94756 HR |
2666 | if (sdkp->capacity > 0xffffffff) |
2667 | sdp->use_16_for_rw = 1; | |
1da177e4 | 2668 | |
89d94756 | 2669 | } |
1da177e4 | 2670 | |
89d94756 HR |
2671 | /* |
2672 | * Print disk capacity | |
2673 | */ | |
2674 | static void | |
2675 | sd_print_capacity(struct scsi_disk *sdkp, | |
2676 | sector_t old_capacity) | |
2677 | { | |
2678 | int sector_size = sdkp->device->sector_size; | |
2679 | char cap_str_2[10], cap_str_10[10]; | |
ea09bcc9 | 2680 | |
d7e6db20 DLM |
2681 | if (!sdkp->first_scan && old_capacity == sdkp->capacity) |
2682 | return; | |
2683 | ||
89d94756 HR |
2684 | string_get_size(sdkp->capacity, sector_size, |
2685 | STRING_UNITS_2, cap_str_2, sizeof(cap_str_2)); | |
2686 | string_get_size(sdkp->capacity, sector_size, | |
d7e6db20 | 2687 | STRING_UNITS_10, cap_str_10, sizeof(cap_str_10)); |
1da177e4 | 2688 | |
d7e6db20 DLM |
2689 | sd_printk(KERN_NOTICE, sdkp, |
2690 | "%llu %d-byte logical blocks: (%s/%s)\n", | |
2691 | (unsigned long long)sdkp->capacity, | |
2692 | sector_size, cap_str_10, cap_str_2); | |
53ad570b | 2693 | |
d7e6db20 DLM |
2694 | if (sdkp->physical_block_size != sector_size) |
2695 | sd_printk(KERN_NOTICE, sdkp, | |
2696 | "%u-byte physical blocks\n", | |
2697 | sdkp->physical_block_size); | |
1da177e4 LT |
2698 | } |
2699 | ||
2700 | /* called with buffer of length 512 */ | |
2701 | static inline int | |
0610959f | 2702 | sd_do_mode_sense(struct scsi_disk *sdkp, int dbd, int modepage, |
ea73a9f2 JB |
2703 | unsigned char *buffer, int len, struct scsi_mode_data *data, |
2704 | struct scsi_sense_hdr *sshdr) | |
1da177e4 | 2705 | { |
c749301e DLM |
2706 | /* |
2707 | * If we must use MODE SENSE(10), make sure that the buffer length | |
2708 | * is at least 8 bytes so that the mode sense header fits. | |
2709 | */ | |
2710 | if (sdkp->device->use_10_for_ms && len < 8) | |
2711 | len = 8; | |
2712 | ||
a6cdc35f DLM |
2713 | return scsi_mode_sense(sdkp->device, dbd, modepage, 0, buffer, len, |
2714 | SD_TIMEOUT, sdkp->max_retries, data, sshdr); | |
1da177e4 LT |
2715 | } |
2716 | ||
2717 | /* | |
2718 | * read write protect setting, if possible - called only in sd_revalidate_disk() | |
48970800 | 2719 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
2720 | */ |
2721 | static void | |
e73aec82 | 2722 | sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer) |
ea73a9f2 | 2723 | { |
1da177e4 | 2724 | int res; |
ea73a9f2 | 2725 | struct scsi_device *sdp = sdkp->device; |
1da177e4 | 2726 | struct scsi_mode_data data; |
70a9b873 | 2727 | int old_wp = sdkp->write_prot; |
1da177e4 LT |
2728 | |
2729 | set_disk_ro(sdkp->disk, 0); | |
ea73a9f2 | 2730 | if (sdp->skip_ms_page_3f) { |
b2bff6ce | 2731 | sd_first_printk(KERN_NOTICE, sdkp, "Assuming Write Enabled\n"); |
1da177e4 LT |
2732 | return; |
2733 | } | |
2734 | ||
ea73a9f2 | 2735 | if (sdp->use_192_bytes_for_3f) { |
0610959f | 2736 | res = sd_do_mode_sense(sdkp, 0, 0x3F, buffer, 192, &data, NULL); |
1da177e4 LT |
2737 | } else { |
2738 | /* | |
2739 | * First attempt: ask for all pages (0x3F), but only 4 bytes. | |
2740 | * We have to start carefully: some devices hang if we ask | |
2741 | * for more than is available. | |
2742 | */ | |
0610959f | 2743 | res = sd_do_mode_sense(sdkp, 0, 0x3F, buffer, 4, &data, NULL); |
1da177e4 LT |
2744 | |
2745 | /* | |
2746 | * Second attempt: ask for page 0 When only page 0 is | |
2747 | * implemented, a request for page 3F may return Sense Key | |
2748 | * 5: Illegal Request, Sense Code 24: Invalid field in | |
2749 | * CDB. | |
2750 | */ | |
8793613d | 2751 | if (res < 0) |
0610959f | 2752 | res = sd_do_mode_sense(sdkp, 0, 0, buffer, 4, &data, NULL); |
1da177e4 LT |
2753 | |
2754 | /* | |
2755 | * Third attempt: ask 255 bytes, as we did earlier. | |
2756 | */ | |
8793613d | 2757 | if (res < 0) |
0610959f | 2758 | res = sd_do_mode_sense(sdkp, 0, 0x3F, buffer, 255, |
ea73a9f2 | 2759 | &data, NULL); |
1da177e4 LT |
2760 | } |
2761 | ||
8793613d | 2762 | if (res < 0) { |
b2bff6ce | 2763 | sd_first_printk(KERN_WARNING, sdkp, |
e73aec82 | 2764 | "Test WP failed, assume Write Enabled\n"); |
1da177e4 LT |
2765 | } else { |
2766 | sdkp->write_prot = ((data.device_specific & 0x80) != 0); | |
8acf608e | 2767 | set_disk_ro(sdkp->disk, sdkp->write_prot); |
70a9b873 MP |
2768 | if (sdkp->first_scan || old_wp != sdkp->write_prot) { |
2769 | sd_printk(KERN_NOTICE, sdkp, "Write Protect is %s\n", | |
2770 | sdkp->write_prot ? "on" : "off"); | |
df441cc0 | 2771 | sd_printk(KERN_DEBUG, sdkp, "Mode Sense: %4ph\n", buffer); |
70a9b873 | 2772 | } |
1da177e4 LT |
2773 | } |
2774 | } | |
2775 | ||
2776 | /* | |
2777 | * sd_read_cache_type - called only from sd_revalidate_disk() | |
48970800 | 2778 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
2779 | */ |
2780 | static void | |
e73aec82 | 2781 | sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer) |
631e8a13 | 2782 | { |
1da177e4 | 2783 | int len = 0, res; |
ea73a9f2 | 2784 | struct scsi_device *sdp = sdkp->device; |
1da177e4 | 2785 | |
631e8a13 AV |
2786 | int dbd; |
2787 | int modepage; | |
0bcaa111 | 2788 | int first_len; |
1da177e4 LT |
2789 | struct scsi_mode_data data; |
2790 | struct scsi_sense_hdr sshdr; | |
70a9b873 MP |
2791 | int old_wce = sdkp->WCE; |
2792 | int old_rcd = sdkp->RCD; | |
2793 | int old_dpofua = sdkp->DPOFUA; | |
1da177e4 | 2794 | |
39c60a09 JB |
2795 | |
2796 | if (sdkp->cache_override) | |
2797 | return; | |
2798 | ||
0bcaa111 LT |
2799 | first_len = 4; |
2800 | if (sdp->skip_ms_page_8) { | |
2801 | if (sdp->type == TYPE_RBC) | |
2802 | goto defaults; | |
2803 | else { | |
2804 | if (sdp->skip_ms_page_3f) | |
2805 | goto defaults; | |
2806 | modepage = 0x3F; | |
2807 | if (sdp->use_192_bytes_for_3f) | |
2808 | first_len = 192; | |
2809 | dbd = 0; | |
2810 | } | |
2811 | } else if (sdp->type == TYPE_RBC) { | |
631e8a13 AV |
2812 | modepage = 6; |
2813 | dbd = 8; | |
2814 | } else { | |
2815 | modepage = 8; | |
2816 | dbd = 0; | |
2817 | } | |
2818 | ||
1da177e4 | 2819 | /* cautiously ask */ |
0610959f | 2820 | res = sd_do_mode_sense(sdkp, dbd, modepage, buffer, first_len, |
0bcaa111 | 2821 | &data, &sshdr); |
1da177e4 | 2822 | |
8793613d | 2823 | if (res < 0) |
1da177e4 LT |
2824 | goto bad_sense; |
2825 | ||
6d73c851 AV |
2826 | if (!data.header_length) { |
2827 | modepage = 6; | |
0bcaa111 | 2828 | first_len = 0; |
b2bff6ce MP |
2829 | sd_first_printk(KERN_ERR, sdkp, |
2830 | "Missing header in MODE_SENSE response\n"); | |
6d73c851 AV |
2831 | } |
2832 | ||
1da177e4 LT |
2833 | /* that went OK, now ask for the proper length */ |
2834 | len = data.length; | |
2835 | ||
2836 | /* | |
2837 | * We're only interested in the first three bytes, actually. | |
2838 | * But the data cache page is defined for the first 20. | |
2839 | */ | |
2840 | if (len < 3) | |
2841 | goto bad_sense; | |
0bcaa111 | 2842 | else if (len > SD_BUF_SIZE) { |
b2bff6ce | 2843 | sd_first_printk(KERN_NOTICE, sdkp, "Truncating mode parameter " |
0bcaa111 LT |
2844 | "data from %d to %d bytes\n", len, SD_BUF_SIZE); |
2845 | len = SD_BUF_SIZE; | |
2846 | } | |
2847 | if (modepage == 0x3F && sdp->use_192_bytes_for_3f) | |
2848 | len = 192; | |
1da177e4 LT |
2849 | |
2850 | /* Get the data */ | |
0bcaa111 | 2851 | if (len > first_len) |
0610959f | 2852 | res = sd_do_mode_sense(sdkp, dbd, modepage, buffer, len, |
0bcaa111 | 2853 | &data, &sshdr); |
1da177e4 | 2854 | |
8793613d | 2855 | if (!res) { |
631e8a13 | 2856 | int offset = data.header_length + data.block_descriptor_length; |
1da177e4 | 2857 | |
0bcaa111 LT |
2858 | while (offset < len) { |
2859 | u8 page_code = buffer[offset] & 0x3F; | |
2860 | u8 spf = buffer[offset] & 0x40; | |
2861 | ||
2862 | if (page_code == 8 || page_code == 6) { | |
2863 | /* We're interested only in the first 3 bytes. | |
2864 | */ | |
2865 | if (len - offset <= 2) { | |
b2bff6ce MP |
2866 | sd_first_printk(KERN_ERR, sdkp, |
2867 | "Incomplete mode parameter " | |
2868 | "data\n"); | |
0bcaa111 LT |
2869 | goto defaults; |
2870 | } else { | |
2871 | modepage = page_code; | |
2872 | goto Page_found; | |
2873 | } | |
2874 | } else { | |
2875 | /* Go to the next page */ | |
2876 | if (spf && len - offset > 3) | |
2877 | offset += 4 + (buffer[offset+2] << 8) + | |
2878 | buffer[offset+3]; | |
2879 | else if (!spf && len - offset > 1) | |
2880 | offset += 2 + buffer[offset+1]; | |
2881 | else { | |
b2bff6ce MP |
2882 | sd_first_printk(KERN_ERR, sdkp, |
2883 | "Incomplete mode " | |
2884 | "parameter data\n"); | |
0bcaa111 LT |
2885 | goto defaults; |
2886 | } | |
2887 | } | |
48970800 AV |
2888 | } |
2889 | ||
c4da1205 MK |
2890 | sd_first_printk(KERN_WARNING, sdkp, |
2891 | "No Caching mode page found\n"); | |
984f1733 AS |
2892 | goto defaults; |
2893 | ||
0bcaa111 | 2894 | Page_found: |
631e8a13 AV |
2895 | if (modepage == 8) { |
2896 | sdkp->WCE = ((buffer[offset + 2] & 0x04) != 0); | |
2897 | sdkp->RCD = ((buffer[offset + 2] & 0x01) != 0); | |
2898 | } else { | |
2899 | sdkp->WCE = ((buffer[offset + 2] & 0x01) == 0); | |
2900 | sdkp->RCD = 0; | |
2901 | } | |
1da177e4 | 2902 | |
007365ad | 2903 | sdkp->DPOFUA = (data.device_specific & 0x10) != 0; |
b14bf2d0 AS |
2904 | if (sdp->broken_fua) { |
2905 | sd_first_printk(KERN_NOTICE, sdkp, "Disabling FUA\n"); | |
2906 | sdkp->DPOFUA = 0; | |
26f28197 DLM |
2907 | } else if (sdkp->DPOFUA && !sdkp->device->use_10_for_rw && |
2908 | !sdkp->device->use_16_for_rw) { | |
b2bff6ce | 2909 | sd_first_printk(KERN_NOTICE, sdkp, |
e73aec82 | 2910 | "Uses READ/WRITE(6), disabling FUA\n"); |
007365ad TH |
2911 | sdkp->DPOFUA = 0; |
2912 | } | |
2913 | ||
2eefd57b SRT |
2914 | /* No cache flush allowed for write protected devices */ |
2915 | if (sdkp->WCE && sdkp->write_prot) | |
2916 | sdkp->WCE = 0; | |
2917 | ||
70a9b873 MP |
2918 | if (sdkp->first_scan || old_wce != sdkp->WCE || |
2919 | old_rcd != sdkp->RCD || old_dpofua != sdkp->DPOFUA) | |
2920 | sd_printk(KERN_NOTICE, sdkp, | |
2921 | "Write cache: %s, read cache: %s, %s\n", | |
2922 | sdkp->WCE ? "enabled" : "disabled", | |
2923 | sdkp->RCD ? "disabled" : "enabled", | |
2924 | sdkp->DPOFUA ? "supports DPO and FUA" | |
2925 | : "doesn't support DPO or FUA"); | |
1da177e4 LT |
2926 | |
2927 | return; | |
2928 | } | |
2929 | ||
2930 | bad_sense: | |
ea73a9f2 | 2931 | if (scsi_sense_valid(&sshdr) && |
1da177e4 LT |
2932 | sshdr.sense_key == ILLEGAL_REQUEST && |
2933 | sshdr.asc == 0x24 && sshdr.ascq == 0x0) | |
e73aec82 | 2934 | /* Invalid field in CDB */ |
b2bff6ce | 2935 | sd_first_printk(KERN_NOTICE, sdkp, "Cache data unavailable\n"); |
1da177e4 | 2936 | else |
b2bff6ce MP |
2937 | sd_first_printk(KERN_ERR, sdkp, |
2938 | "Asking for cache data failed\n"); | |
1da177e4 LT |
2939 | |
2940 | defaults: | |
b81478d8 | 2941 | if (sdp->wce_default_on) { |
b2bff6ce MP |
2942 | sd_first_printk(KERN_NOTICE, sdkp, |
2943 | "Assuming drive cache: write back\n"); | |
b81478d8 NJ |
2944 | sdkp->WCE = 1; |
2945 | } else { | |
c4da1205 | 2946 | sd_first_printk(KERN_WARNING, sdkp, |
b2bff6ce | 2947 | "Assuming drive cache: write through\n"); |
b81478d8 NJ |
2948 | sdkp->WCE = 0; |
2949 | } | |
1da177e4 | 2950 | sdkp->RCD = 0; |
48970800 | 2951 | sdkp->DPOFUA = 0; |
1da177e4 LT |
2952 | } |
2953 | ||
e0597d70 MP |
2954 | /* |
2955 | * The ATO bit indicates whether the DIF application tag is available | |
2956 | * for use by the operating system. | |
2957 | */ | |
439d77f7 | 2958 | static void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer) |
e0597d70 MP |
2959 | { |
2960 | int res, offset; | |
2961 | struct scsi_device *sdp = sdkp->device; | |
2962 | struct scsi_mode_data data; | |
2963 | struct scsi_sense_hdr sshdr; | |
2964 | ||
89d94756 | 2965 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) |
e0597d70 MP |
2966 | return; |
2967 | ||
2968 | if (sdkp->protection_type == 0) | |
2969 | return; | |
2970 | ||
a6cdc35f | 2971 | res = scsi_mode_sense(sdp, 1, 0x0a, 0, buffer, 36, SD_TIMEOUT, |
0610959f | 2972 | sdkp->max_retries, &data, &sshdr); |
e0597d70 | 2973 | |
8793613d | 2974 | if (res < 0 || !data.header_length || |
e0597d70 | 2975 | data.length < 6) { |
b2bff6ce | 2976 | sd_first_printk(KERN_WARNING, sdkp, |
e0597d70 MP |
2977 | "getting Control mode page failed, assume no ATO\n"); |
2978 | ||
2979 | if (scsi_sense_valid(&sshdr)) | |
2980 | sd_print_sense_hdr(sdkp, &sshdr); | |
2981 | ||
2982 | return; | |
2983 | } | |
2984 | ||
2985 | offset = data.header_length + data.block_descriptor_length; | |
2986 | ||
2987 | if ((buffer[offset] & 0x3f) != 0x0a) { | |
b2bff6ce | 2988 | sd_first_printk(KERN_ERR, sdkp, "ATO Got wrong page\n"); |
e0597d70 MP |
2989 | return; |
2990 | } | |
2991 | ||
2992 | if ((buffer[offset + 5] & 0x80) == 0) | |
2993 | return; | |
2994 | ||
2995 | sdkp->ATO = 1; | |
2996 | ||
2997 | return; | |
2998 | } | |
2999 | ||
d11b6916 MP |
3000 | /** |
3001 | * sd_read_block_limits - Query disk device for preferred I/O sizes. | |
7529fbb0 | 3002 | * @sdkp: disk to query |
d11b6916 MP |
3003 | */ |
3004 | static void sd_read_block_limits(struct scsi_disk *sdkp) | |
3005 | { | |
7fb019c4 | 3006 | struct scsi_vpd *vpd; |
d11b6916 | 3007 | |
7fb019c4 | 3008 | rcu_read_lock(); |
d11b6916 | 3009 | |
7fb019c4 MP |
3010 | vpd = rcu_dereference(sdkp->device->vpd_pgb0); |
3011 | if (!vpd || vpd->len < 16) | |
e3deec09 | 3012 | goto out; |
ca369d51 | 3013 | |
631669a2 | 3014 | sdkp->min_xfer_blocks = get_unaligned_be16(&vpd->data[6]); |
7fb019c4 MP |
3015 | sdkp->max_xfer_blocks = get_unaligned_be32(&vpd->data[8]); |
3016 | sdkp->opt_xfer_blocks = get_unaligned_be32(&vpd->data[12]); | |
d11b6916 | 3017 | |
7fb019c4 | 3018 | if (vpd->len >= 64) { |
c98a0eb0 | 3019 | unsigned int lba_count, desc_count; |
e339c1a7 | 3020 | |
7fb019c4 | 3021 | sdkp->max_ws_blocks = (u32)get_unaligned_be64(&vpd->data[36]); |
e339c1a7 | 3022 | |
c98a0eb0 | 3023 | if (!sdkp->lbpme) |
045d3fe7 | 3024 | goto out; |
045d3fe7 | 3025 | |
7fb019c4 MP |
3026 | lba_count = get_unaligned_be32(&vpd->data[20]); |
3027 | desc_count = get_unaligned_be32(&vpd->data[24]); | |
045d3fe7 | 3028 | |
c98a0eb0 MP |
3029 | if (lba_count && desc_count) |
3030 | sdkp->max_unmap_blocks = lba_count; | |
e339c1a7 | 3031 | |
7fb019c4 | 3032 | sdkp->unmap_granularity = get_unaligned_be32(&vpd->data[28]); |
e339c1a7 | 3033 | |
7fb019c4 | 3034 | if (vpd->data[32] & 0x80) |
c98a0eb0 | 3035 | sdkp->unmap_alignment = |
7fb019c4 | 3036 | get_unaligned_be32(&vpd->data[32]) & ~(1 << 31); |
c98a0eb0 MP |
3037 | |
3038 | if (!sdkp->lbpvpd) { /* LBP VPD page not provided */ | |
3039 | ||
3040 | if (sdkp->max_unmap_blocks) | |
3041 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
3042 | else | |
3043 | sd_config_discard(sdkp, SD_LBP_WS16); | |
3044 | ||
3045 | } else { /* LBP VPD page tells us what to use */ | |
bcd069bb | 3046 | if (sdkp->lbpu && sdkp->max_unmap_blocks) |
e461338b MP |
3047 | sd_config_discard(sdkp, SD_LBP_UNMAP); |
3048 | else if (sdkp->lbpws) | |
c98a0eb0 MP |
3049 | sd_config_discard(sdkp, SD_LBP_WS16); |
3050 | else if (sdkp->lbpws10) | |
3051 | sd_config_discard(sdkp, SD_LBP_WS10); | |
3052 | else | |
3053 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
3054 | } | |
e339c1a7 MP |
3055 | } |
3056 | ||
e3deec09 | 3057 | out: |
7fb019c4 | 3058 | rcu_read_unlock(); |
d11b6916 MP |
3059 | } |
3060 | ||
3821d768 MP |
3061 | /** |
3062 | * sd_read_block_characteristics - Query block dev. characteristics | |
7529fbb0 | 3063 | * @sdkp: disk to query |
3821d768 MP |
3064 | */ |
3065 | static void sd_read_block_characteristics(struct scsi_disk *sdkp) | |
3066 | { | |
89d94756 | 3067 | struct request_queue *q = sdkp->disk->queue; |
7fb019c4 | 3068 | struct scsi_vpd *vpd; |
3821d768 | 3069 | u16 rot; |
7fb019c4 | 3070 | u8 zoned; |
3821d768 | 3071 | |
7fb019c4 MP |
3072 | rcu_read_lock(); |
3073 | vpd = rcu_dereference(sdkp->device->vpd_pgb1); | |
3821d768 | 3074 | |
7fb019c4 MP |
3075 | if (!vpd || vpd->len < 8) { |
3076 | rcu_read_unlock(); | |
3077 | return; | |
3078 | } | |
3821d768 | 3079 | |
7fb019c4 MP |
3080 | rot = get_unaligned_be16(&vpd->data[4]); |
3081 | zoned = (vpd->data[8] >> 4) & 3; | |
3082 | rcu_read_unlock(); | |
3821d768 | 3083 | |
b277da0a | 3084 | if (rot == 1) { |
8b904b5b BVA |
3085 | blk_queue_flag_set(QUEUE_FLAG_NONROT, q); |
3086 | blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, q); | |
b277da0a | 3087 | } |
3821d768 | 3088 | |
68af412c | 3089 | if (sdkp->device->type == TYPE_ZBC) { |
288b3271 SK |
3090 | /* |
3091 | * Host-managed: Per ZBC and ZAC specifications, writes in | |
3092 | * sequential write required zones of host-managed devices must | |
3093 | * be aligned to the device physical block size. | |
3094 | */ | |
6b2bd274 | 3095 | disk_set_zoned(sdkp->disk, BLK_ZONED_HM); |
288b3271 | 3096 | blk_queue_zone_write_granularity(q, sdkp->physical_block_size); |
68af412c | 3097 | } else { |
7fb019c4 | 3098 | sdkp->zoned = zoned; |
27ba3e8f | 3099 | if (sdkp->zoned == 1) { |
68af412c | 3100 | /* Host-aware */ |
6b2bd274 | 3101 | disk_set_zoned(sdkp->disk, BLK_ZONED_HA); |
b7205307 | 3102 | } else { |
27ba3e8f | 3103 | /* Regular disk or drive managed disk */ |
6b2bd274 | 3104 | disk_set_zoned(sdkp->disk, BLK_ZONED_NONE); |
b7205307 | 3105 | } |
68af412c | 3106 | } |
27ba3e8f DLM |
3107 | |
3108 | if (!sdkp->first_scan) | |
7fb019c4 | 3109 | return; |
27ba3e8f DLM |
3110 | |
3111 | if (blk_queue_is_zoned(q)) { | |
89d94756 HR |
3112 | sd_printk(KERN_NOTICE, sdkp, "Host-%s zoned block device\n", |
3113 | q->limits.zoned == BLK_ZONED_HM ? "managed" : "aware"); | |
27ba3e8f DLM |
3114 | } else { |
3115 | if (sdkp->zoned == 1) | |
3116 | sd_printk(KERN_NOTICE, sdkp, | |
3117 | "Host-aware SMR disk used as regular disk\n"); | |
3118 | else if (sdkp->zoned == 2) | |
3119 | sd_printk(KERN_NOTICE, sdkp, | |
3120 | "Drive-managed SMR disk\n"); | |
3121 | } | |
3821d768 MP |
3122 | } |
3123 | ||
045d3fe7 | 3124 | /** |
c98a0eb0 | 3125 | * sd_read_block_provisioning - Query provisioning VPD page |
7529fbb0 | 3126 | * @sdkp: disk to query |
045d3fe7 | 3127 | */ |
c98a0eb0 | 3128 | static void sd_read_block_provisioning(struct scsi_disk *sdkp) |
045d3fe7 | 3129 | { |
7fb019c4 | 3130 | struct scsi_vpd *vpd; |
045d3fe7 | 3131 | |
c98a0eb0 | 3132 | if (sdkp->lbpme == 0) |
045d3fe7 MP |
3133 | return; |
3134 | ||
7fb019c4 MP |
3135 | rcu_read_lock(); |
3136 | vpd = rcu_dereference(sdkp->device->vpd_pgb2); | |
045d3fe7 | 3137 | |
7fb019c4 MP |
3138 | if (!vpd || vpd->len < 8) { |
3139 | rcu_read_unlock(); | |
3140 | return; | |
3141 | } | |
045d3fe7 | 3142 | |
c98a0eb0 | 3143 | sdkp->lbpvpd = 1; |
7fb019c4 MP |
3144 | sdkp->lbpu = (vpd->data[5] >> 7) & 1; /* UNMAP */ |
3145 | sdkp->lbpws = (vpd->data[5] >> 6) & 1; /* WRITE SAME(16) w/ UNMAP */ | |
3146 | sdkp->lbpws10 = (vpd->data[5] >> 5) & 1; /* WRITE SAME(10) w/ UNMAP */ | |
3147 | rcu_read_unlock(); | |
045d3fe7 MP |
3148 | } |
3149 | ||
5db44863 MP |
3150 | static void sd_read_write_same(struct scsi_disk *sdkp, unsigned char *buffer) |
3151 | { | |
66c28f97 MP |
3152 | struct scsi_device *sdev = sdkp->device; |
3153 | ||
54b2b50c MP |
3154 | if (sdev->host->no_write_same) { |
3155 | sdev->no_write_same = 1; | |
3156 | ||
3157 | return; | |
3158 | } | |
3159 | ||
152e52fb | 3160 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, INQUIRY, 0) < 0) { |
e38d9e83 | 3161 | struct scsi_vpd *vpd; |
af73623f | 3162 | |
66c28f97 MP |
3163 | sdev->no_report_opcodes = 1; |
3164 | ||
3165 | /* Disable WRITE SAME if REPORT SUPPORTED OPERATION | |
3166 | * CODES is unsupported and the device has an ATA | |
3167 | * Information VPD page (SAT). | |
3168 | */ | |
e38d9e83 MP |
3169 | rcu_read_lock(); |
3170 | vpd = rcu_dereference(sdev->vpd_pg89); | |
3171 | if (vpd) | |
66c28f97 | 3172 | sdev->no_write_same = 1; |
e38d9e83 | 3173 | rcu_read_unlock(); |
66c28f97 MP |
3174 | } |
3175 | ||
152e52fb | 3176 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME_16, 0) == 1) |
5db44863 | 3177 | sdkp->ws16 = 1; |
66c28f97 | 3178 | |
152e52fb | 3179 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME, 0) == 1) |
66c28f97 | 3180 | sdkp->ws10 = 1; |
5db44863 MP |
3181 | } |
3182 | ||
d80210f2 CH |
3183 | static void sd_read_security(struct scsi_disk *sdkp, unsigned char *buffer) |
3184 | { | |
3185 | struct scsi_device *sdev = sdkp->device; | |
3186 | ||
3187 | if (!sdev->security_supported) | |
3188 | return; | |
3189 | ||
3190 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, | |
152e52fb | 3191 | SECURITY_PROTOCOL_IN, 0) == 1 && |
d80210f2 | 3192 | scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, |
152e52fb | 3193 | SECURITY_PROTOCOL_OUT, 0) == 1) |
d80210f2 CH |
3194 | sdkp->security = 1; |
3195 | } | |
3196 | ||
e815d365 DLM |
3197 | static inline sector_t sd64_to_sectors(struct scsi_disk *sdkp, u8 *buf) |
3198 | { | |
3199 | return logical_to_sectors(sdkp->device, get_unaligned_be64(buf)); | |
3200 | } | |
3201 | ||
3202 | /** | |
3203 | * sd_read_cpr - Query concurrent positioning ranges | |
3204 | * @sdkp: disk to query | |
3205 | */ | |
3206 | static void sd_read_cpr(struct scsi_disk *sdkp) | |
3207 | { | |
3208 | struct blk_independent_access_ranges *iars = NULL; | |
3209 | unsigned char *buffer = NULL; | |
3210 | unsigned int nr_cpr = 0; | |
3211 | int i, vpd_len, buf_len = SD_BUF_SIZE; | |
3212 | u8 *desc; | |
3213 | ||
3214 | /* | |
3215 | * We need to have the capacity set first for the block layer to be | |
3216 | * able to check the ranges. | |
3217 | */ | |
3218 | if (sdkp->first_scan) | |
3219 | return; | |
3220 | ||
3221 | if (!sdkp->capacity) | |
3222 | goto out; | |
3223 | ||
3224 | /* | |
3225 | * Concurrent Positioning Ranges VPD: there can be at most 256 ranges, | |
3226 | * leading to a maximum page size of 64 + 256*32 bytes. | |
3227 | */ | |
3228 | buf_len = 64 + 256*32; | |
3229 | buffer = kmalloc(buf_len, GFP_KERNEL); | |
3230 | if (!buffer || scsi_get_vpd_page(sdkp->device, 0xb9, buffer, buf_len)) | |
3231 | goto out; | |
3232 | ||
3233 | /* We must have at least a 64B header and one 32B range descriptor */ | |
f92de9d1 | 3234 | vpd_len = get_unaligned_be16(&buffer[2]) + 4; |
e815d365 DLM |
3235 | if (vpd_len > buf_len || vpd_len < 64 + 32 || (vpd_len & 31)) { |
3236 | sd_printk(KERN_ERR, sdkp, | |
3237 | "Invalid Concurrent Positioning Ranges VPD page\n"); | |
3238 | goto out; | |
3239 | } | |
3240 | ||
3241 | nr_cpr = (vpd_len - 64) / 32; | |
3242 | if (nr_cpr == 1) { | |
3243 | nr_cpr = 0; | |
3244 | goto out; | |
3245 | } | |
3246 | ||
3247 | iars = disk_alloc_independent_access_ranges(sdkp->disk, nr_cpr); | |
3248 | if (!iars) { | |
3249 | nr_cpr = 0; | |
3250 | goto out; | |
3251 | } | |
3252 | ||
3253 | desc = &buffer[64]; | |
3254 | for (i = 0; i < nr_cpr; i++, desc += 32) { | |
3255 | if (desc[0] != i) { | |
3256 | sd_printk(KERN_ERR, sdkp, | |
3257 | "Invalid Concurrent Positioning Range number\n"); | |
3258 | nr_cpr = 0; | |
3259 | break; | |
3260 | } | |
3261 | ||
3262 | iars->ia_range[i].sector = sd64_to_sectors(sdkp, desc + 8); | |
3263 | iars->ia_range[i].nr_sectors = sd64_to_sectors(sdkp, desc + 16); | |
3264 | } | |
3265 | ||
3266 | out: | |
3267 | disk_set_independent_access_ranges(sdkp->disk, iars); | |
3268 | if (nr_cpr && sdkp->nr_actuators != nr_cpr) { | |
3269 | sd_printk(KERN_NOTICE, sdkp, | |
3270 | "%u concurrent positioning ranges\n", nr_cpr); | |
3271 | sdkp->nr_actuators = nr_cpr; | |
3272 | } | |
3273 | ||
3274 | kfree(buffer); | |
3275 | } | |
3276 | ||
631669a2 MP |
3277 | static bool sd_validate_min_xfer_size(struct scsi_disk *sdkp) |
3278 | { | |
3279 | struct scsi_device *sdp = sdkp->device; | |
3280 | unsigned int min_xfer_bytes = | |
3281 | logical_to_bytes(sdp, sdkp->min_xfer_blocks); | |
3282 | ||
3283 | if (sdkp->min_xfer_blocks == 0) | |
3284 | return false; | |
3285 | ||
3286 | if (min_xfer_bytes & (sdkp->physical_block_size - 1)) { | |
3287 | sd_first_printk(KERN_WARNING, sdkp, | |
3288 | "Preferred minimum I/O size %u bytes not a " \ | |
3289 | "multiple of physical block size (%u bytes)\n", | |
3290 | min_xfer_bytes, sdkp->physical_block_size); | |
3291 | sdkp->min_xfer_blocks = 0; | |
3292 | return false; | |
3293 | } | |
3294 | ||
3295 | sd_first_printk(KERN_INFO, sdkp, "Preferred minimum I/O size %u bytes\n", | |
3296 | min_xfer_bytes); | |
3297 | return true; | |
3298 | } | |
3299 | ||
a83da8a4 MP |
3300 | /* |
3301 | * Determine the device's preferred I/O size for reads and writes | |
3302 | * unless the reported value is unreasonably small, large, not a | |
3303 | * multiple of the physical block size, or simply garbage. | |
3304 | */ | |
3305 | static bool sd_validate_opt_xfer_size(struct scsi_disk *sdkp, | |
3306 | unsigned int dev_max) | |
3307 | { | |
3308 | struct scsi_device *sdp = sdkp->device; | |
3309 | unsigned int opt_xfer_bytes = | |
3310 | logical_to_bytes(sdp, sdkp->opt_xfer_blocks); | |
631669a2 MP |
3311 | unsigned int min_xfer_bytes = |
3312 | logical_to_bytes(sdp, sdkp->min_xfer_blocks); | |
a83da8a4 | 3313 | |
1d5de5bd MP |
3314 | if (sdkp->opt_xfer_blocks == 0) |
3315 | return false; | |
3316 | ||
a83da8a4 MP |
3317 | if (sdkp->opt_xfer_blocks > dev_max) { |
3318 | sd_first_printk(KERN_WARNING, sdkp, | |
3319 | "Optimal transfer size %u logical blocks " \ | |
3320 | "> dev_max (%u logical blocks)\n", | |
3321 | sdkp->opt_xfer_blocks, dev_max); | |
3322 | return false; | |
3323 | } | |
3324 | ||
3325 | if (sdkp->opt_xfer_blocks > SD_DEF_XFER_BLOCKS) { | |
3326 | sd_first_printk(KERN_WARNING, sdkp, | |
3327 | "Optimal transfer size %u logical blocks " \ | |
3328 | "> sd driver limit (%u logical blocks)\n", | |
3329 | sdkp->opt_xfer_blocks, SD_DEF_XFER_BLOCKS); | |
3330 | return false; | |
3331 | } | |
3332 | ||
3333 | if (opt_xfer_bytes < PAGE_SIZE) { | |
3334 | sd_first_printk(KERN_WARNING, sdkp, | |
3335 | "Optimal transfer size %u bytes < " \ | |
3336 | "PAGE_SIZE (%u bytes)\n", | |
3337 | opt_xfer_bytes, (unsigned int)PAGE_SIZE); | |
3338 | return false; | |
3339 | } | |
3340 | ||
631669a2 MP |
3341 | if (min_xfer_bytes && opt_xfer_bytes % min_xfer_bytes) { |
3342 | sd_first_printk(KERN_WARNING, sdkp, | |
3343 | "Optimal transfer size %u bytes not a " \ | |
3344 | "multiple of preferred minimum block " \ | |
3345 | "size (%u bytes)\n", | |
3346 | opt_xfer_bytes, min_xfer_bytes); | |
3347 | return false; | |
3348 | } | |
3349 | ||
a83da8a4 MP |
3350 | if (opt_xfer_bytes & (sdkp->physical_block_size - 1)) { |
3351 | sd_first_printk(KERN_WARNING, sdkp, | |
3352 | "Optimal transfer size %u bytes not a " \ | |
3353 | "multiple of physical block size (%u bytes)\n", | |
3354 | opt_xfer_bytes, sdkp->physical_block_size); | |
3355 | return false; | |
3356 | } | |
3357 | ||
3358 | sd_first_printk(KERN_INFO, sdkp, "Optimal transfer size %u bytes\n", | |
3359 | opt_xfer_bytes); | |
3360 | return true; | |
3361 | } | |
3362 | ||
1da177e4 LT |
3363 | /** |
3364 | * sd_revalidate_disk - called the first time a new disk is seen, | |
3365 | * performs disk spin up, read_capacity, etc. | |
3366 | * @disk: struct gendisk we care about | |
3367 | **/ | |
3368 | static int sd_revalidate_disk(struct gendisk *disk) | |
3369 | { | |
3370 | struct scsi_disk *sdkp = scsi_disk(disk); | |
3371 | struct scsi_device *sdp = sdkp->device; | |
ca369d51 | 3372 | struct request_queue *q = sdkp->disk->queue; |
89d94756 | 3373 | sector_t old_capacity = sdkp->capacity; |
1da177e4 | 3374 | unsigned char *buffer; |
ca369d51 | 3375 | unsigned int dev_max, rw_max; |
1da177e4 | 3376 | |
fa0d34be MP |
3377 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, |
3378 | "sd_revalidate_disk\n")); | |
1da177e4 LT |
3379 | |
3380 | /* | |
3381 | * If the device is offline, don't try and read capacity or any | |
3382 | * of the other niceties. | |
3383 | */ | |
3384 | if (!scsi_device_online(sdp)) | |
3385 | goto out; | |
3386 | ||
a6123f14 | 3387 | buffer = kmalloc(SD_BUF_SIZE, GFP_KERNEL); |
1da177e4 | 3388 | if (!buffer) { |
e73aec82 MP |
3389 | sd_printk(KERN_WARNING, sdkp, "sd_revalidate_disk: Memory " |
3390 | "allocation failure.\n"); | |
ea73a9f2 | 3391 | goto out; |
1da177e4 LT |
3392 | } |
3393 | ||
e73aec82 | 3394 | sd_spinup_disk(sdkp); |
1da177e4 LT |
3395 | |
3396 | /* | |
3397 | * Without media there is no reason to ask; moreover, some devices | |
3398 | * react badly if we do. | |
3399 | */ | |
3400 | if (sdkp->media_present) { | |
e73aec82 | 3401 | sd_read_capacity(sdkp, buffer); |
ffd4bc2a | 3402 | |
e4a05698 JB |
3403 | /* |
3404 | * set the default to rotational. All non-rotational devices | |
3405 | * support the block characteristics VPD page, which will | |
3406 | * cause this to be updated correctly and any device which | |
3407 | * doesn't support it should be treated as rotational. | |
3408 | */ | |
3409 | blk_queue_flag_clear(QUEUE_FLAG_NONROT, q); | |
3410 | blk_queue_flag_set(QUEUE_FLAG_ADD_RANDOM, q); | |
3411 | ||
5ddfe085 | 3412 | if (scsi_device_supports_vpd(sdp)) { |
c98a0eb0 | 3413 | sd_read_block_provisioning(sdkp); |
ffd4bc2a MP |
3414 | sd_read_block_limits(sdkp); |
3415 | sd_read_block_characteristics(sdkp); | |
89d94756 | 3416 | sd_zbc_read_zones(sdkp, buffer); |
1700714b | 3417 | sd_read_cpr(sdkp); |
ffd4bc2a MP |
3418 | } |
3419 | ||
89d94756 HR |
3420 | sd_print_capacity(sdkp, old_capacity); |
3421 | ||
e73aec82 MP |
3422 | sd_read_write_protect_flag(sdkp, buffer); |
3423 | sd_read_cache_type(sdkp, buffer); | |
e0597d70 | 3424 | sd_read_app_tag_own(sdkp, buffer); |
5db44863 | 3425 | sd_read_write_same(sdkp, buffer); |
d80210f2 | 3426 | sd_read_security(sdkp, buffer); |
1e029397 | 3427 | sd_config_protection(sdkp); |
1da177e4 | 3428 | } |
461d4e90 TH |
3429 | |
3430 | /* | |
3431 | * We now have all cache related info, determine how we deal | |
4913efe4 | 3432 | * with flush requests. |
461d4e90 | 3433 | */ |
cb2fb68d | 3434 | sd_set_flush_flag(sdkp); |
461d4e90 | 3435 | |
ca369d51 MP |
3436 | /* Initial block count limit based on CDB TRANSFER LENGTH field size. */ |
3437 | dev_max = sdp->use_16_for_rw ? SD_MAX_XFER_BLOCKS : SD_DEF_XFER_BLOCKS; | |
3438 | ||
3439 | /* Some devices report a maximum block count for READ/WRITE requests. */ | |
3440 | dev_max = min_not_zero(dev_max, sdkp->max_xfer_blocks); | |
3441 | q->limits.max_dev_sectors = logical_to_sectors(sdp, dev_max); | |
3442 | ||
631669a2 MP |
3443 | if (sd_validate_min_xfer_size(sdkp)) |
3444 | blk_queue_io_min(sdkp->disk->queue, | |
3445 | logical_to_bytes(sdp, sdkp->min_xfer_blocks)); | |
3446 | else | |
3447 | blk_queue_io_min(sdkp->disk->queue, 0); | |
3448 | ||
a83da8a4 | 3449 | if (sd_validate_opt_xfer_size(sdkp, dev_max)) { |
6b7e9cde MP |
3450 | q->limits.io_opt = logical_to_bytes(sdp, sdkp->opt_xfer_blocks); |
3451 | rw_max = logical_to_sectors(sdp, sdkp->opt_xfer_blocks); | |
ea697a8b MP |
3452 | } else { |
3453 | q->limits.io_opt = 0; | |
67804145 FZ |
3454 | rw_max = min_not_zero(logical_to_sectors(sdp, dev_max), |
3455 | (sector_t)BLK_DEF_MAX_SECTORS); | |
ea697a8b | 3456 | } |
3a9794d3 | 3457 | |
c9337ad4 JG |
3458 | /* |
3459 | * Limit default to SCSI host optimal sector limit if set. There may be | |
3460 | * an impact on performance for when the size of a request exceeds this | |
3461 | * host limit. | |
3462 | */ | |
608128d3 JG |
3463 | rw_max = min_not_zero(rw_max, sdp->host->opt_sectors); |
3464 | ||
77082ca5 MP |
3465 | /* Do not exceed controller limit */ |
3466 | rw_max = min(rw_max, queue_max_hw_sectors(q)); | |
3467 | ||
3468 | /* | |
3469 | * Only update max_sectors if previously unset or if the current value | |
3470 | * exceeds the capabilities of the hardware. | |
3471 | */ | |
3472 | if (sdkp->first_scan || | |
3473 | q->limits.max_sectors > q->limits.max_dev_sectors || | |
3474 | q->limits.max_sectors > q->limits.max_hw_sectors) | |
3475 | q->limits.max_sectors = rw_max; | |
3476 | ||
3477 | sdkp->first_scan = 0; | |
4f258a46 | 3478 | |
449f4ec9 | 3479 | set_capacity_and_notify(disk, logical_to_sectors(sdp, sdkp->capacity)); |
5db44863 | 3480 | sd_config_write_same(sdkp); |
1da177e4 LT |
3481 | kfree(buffer); |
3482 | ||
a3d8a257 DLM |
3483 | /* |
3484 | * For a zoned drive, revalidating the zones can be done only once | |
3485 | * the gendisk capacity is set. So if this fails, set back the gendisk | |
3486 | * capacity to 0. | |
3487 | */ | |
3488 | if (sd_zbc_revalidate_zones(sdkp)) | |
449f4ec9 | 3489 | set_capacity_and_notify(disk, 0); |
a3d8a257 | 3490 | |
1da177e4 LT |
3491 | out: |
3492 | return 0; | |
3493 | } | |
3494 | ||
72ec24bd TH |
3495 | /** |
3496 | * sd_unlock_native_capacity - unlock native capacity | |
3497 | * @disk: struct gendisk to set capacity for | |
3498 | * | |
3499 | * Block layer calls this function if it detects that partitions | |
3500 | * on @disk reach beyond the end of the device. If the SCSI host | |
3501 | * implements ->unlock_native_capacity() method, it's invoked to | |
3502 | * give it a chance to adjust the device capacity. | |
3503 | * | |
3504 | * CONTEXT: | |
3505 | * Defined by block layer. Might sleep. | |
3506 | */ | |
3507 | static void sd_unlock_native_capacity(struct gendisk *disk) | |
3508 | { | |
3509 | struct scsi_device *sdev = scsi_disk(disk)->device; | |
3510 | ||
3511 | if (sdev->host->hostt->unlock_native_capacity) | |
3512 | sdev->host->hostt->unlock_native_capacity(sdev); | |
3513 | } | |
3514 | ||
3e1a7ff8 TH |
3515 | /** |
3516 | * sd_format_disk_name - format disk name | |
3517 | * @prefix: name prefix - ie. "sd" for SCSI disks | |
3518 | * @index: index of the disk to format name for | |
3519 | * @buf: output buffer | |
3520 | * @buflen: length of the output buffer | |
3521 | * | |
3522 | * SCSI disk names starts at sda. The 26th device is sdz and the | |
3523 | * 27th is sdaa. The last one for two lettered suffix is sdzz | |
3524 | * which is followed by sdaaa. | |
3525 | * | |
3526 | * This is basically 26 base counting with one extra 'nil' entry | |
3ad2f3fb | 3527 | * at the beginning from the second digit on and can be |
3e1a7ff8 TH |
3528 | * determined using similar method as 26 base conversion with the |
3529 | * index shifted -1 after each digit is computed. | |
3530 | * | |
3531 | * CONTEXT: | |
3532 | * Don't care. | |
3533 | * | |
3534 | * RETURNS: | |
3535 | * 0 on success, -errno on failure. | |
3536 | */ | |
3537 | static int sd_format_disk_name(char *prefix, int index, char *buf, int buflen) | |
3538 | { | |
3539 | const int base = 'z' - 'a' + 1; | |
3540 | char *begin = buf + strlen(prefix); | |
3541 | char *end = buf + buflen; | |
3542 | char *p; | |
3543 | int unit; | |
3544 | ||
3545 | p = end - 1; | |
3546 | *p = '\0'; | |
3547 | unit = base; | |
3548 | do { | |
3549 | if (p == begin) | |
3550 | return -EINVAL; | |
3551 | *--p = 'a' + (index % unit); | |
3552 | index = (index / unit) - 1; | |
3553 | } while (index >= 0); | |
3554 | ||
3555 | memmove(begin, p, end - p); | |
3556 | memcpy(buf, prefix, strlen(prefix)); | |
3557 | ||
3558 | return 0; | |
3559 | } | |
3560 | ||
1da177e4 LT |
3561 | /** |
3562 | * sd_probe - called during driver initialization and whenever a | |
3563 | * new scsi device is attached to the system. It is called once | |
3564 | * for each scsi device (not just disks) present. | |
3565 | * @dev: pointer to device object | |
3566 | * | |
3567 | * Returns 0 if successful (or not interested in this scsi device | |
3568 | * (e.g. scanner)); 1 when there is an error. | |
3569 | * | |
3570 | * Note: this function is invoked from the scsi mid-level. | |
3571 | * This function sets up the mapping between a given | |
3572 | * <host,channel,id,lun> (found in sdp) and new device name | |
3573 | * (e.g. /dev/sda). More precisely it is the block device major | |
3574 | * and minor number that is chosen here. | |
3575 | * | |
2db93ce8 PU |
3576 | * Assume sd_probe is not re-entrant (for time being) |
3577 | * Also think about sd_probe() and sd_remove() running coincidentally. | |
1da177e4 LT |
3578 | **/ |
3579 | static int sd_probe(struct device *dev) | |
3580 | { | |
3581 | struct scsi_device *sdp = to_scsi_device(dev); | |
3582 | struct scsi_disk *sdkp; | |
3583 | struct gendisk *gd; | |
439d77f7 | 3584 | int index; |
1da177e4 LT |
3585 | int error; |
3586 | ||
6fe8c1db | 3587 | scsi_autopm_get_device(sdp); |
1da177e4 | 3588 | error = -ENODEV; |
89d94756 HR |
3589 | if (sdp->type != TYPE_DISK && |
3590 | sdp->type != TYPE_ZBC && | |
3591 | sdp->type != TYPE_MOD && | |
3592 | sdp->type != TYPE_RBC) | |
1da177e4 LT |
3593 | goto out; |
3594 | ||
bf1b4659 DLM |
3595 | if (!IS_ENABLED(CONFIG_BLK_DEV_ZONED) && sdp->type == TYPE_ZBC) { |
3596 | sdev_printk(KERN_WARNING, sdp, | |
3597 | "Unsupported ZBC host-managed device.\n"); | |
89d94756 | 3598 | goto out; |
bf1b4659 DLM |
3599 | } |
3600 | ||
9ccfc756 | 3601 | SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO, sdp, |
2db93ce8 | 3602 | "sd_probe\n")); |
1da177e4 LT |
3603 | |
3604 | error = -ENOMEM; | |
24669f75 | 3605 | sdkp = kzalloc(sizeof(*sdkp), GFP_KERNEL); |
1da177e4 LT |
3606 | if (!sdkp) |
3607 | goto out; | |
3608 | ||
6f8191fd CH |
3609 | gd = blk_mq_alloc_disk_for_queue(sdp->request_queue, |
3610 | &sd_bio_compl_lkclass); | |
1da177e4 | 3611 | if (!gd) |
c01228db | 3612 | goto out_free; |
1da177e4 | 3613 | |
94015080 MW |
3614 | index = ida_alloc(&sd_index_ida, GFP_KERNEL); |
3615 | if (index < 0) { | |
21208ae5 | 3616 | sdev_printk(KERN_WARNING, sdp, "sd_probe: memory exhausted.\n"); |
1da177e4 | 3617 | goto out_put; |
1a03ae0f MR |
3618 | } |
3619 | ||
3e1a7ff8 | 3620 | error = sd_format_disk_name("sd", index, gd->disk_name, DISK_NAME_LEN); |
21208ae5 DK |
3621 | if (error) { |
3622 | sdev_printk(KERN_WARNING, sdp, "SCSI disk (sd) name length exceeded.\n"); | |
f27bac27 | 3623 | goto out_free_index; |
21208ae5 | 3624 | } |
f27bac27 | 3625 | |
1da177e4 | 3626 | sdkp->device = sdp; |
1da177e4 LT |
3627 | sdkp->disk = gd; |
3628 | sdkp->index = index; | |
0610959f | 3629 | sdkp->max_retries = SD_MAX_RETRIES; |
409f3499 | 3630 | atomic_set(&sdkp->openers, 0); |
9e1a1537 | 3631 | atomic_set(&sdkp->device->ioerr_cnt, 0); |
1da177e4 | 3632 | |
601e7638 JB |
3633 | if (!sdp->request_queue->rq_timeout) { |
3634 | if (sdp->type != TYPE_MOD) | |
3635 | blk_queue_rq_timeout(sdp->request_queue, SD_TIMEOUT); | |
3636 | else | |
3637 | blk_queue_rq_timeout(sdp->request_queue, | |
3638 | SD_MOD_TIMEOUT); | |
3639 | } | |
3640 | ||
fad45c30 CH |
3641 | device_initialize(&sdkp->disk_dev); |
3642 | sdkp->disk_dev.parent = get_device(dev); | |
3643 | sdkp->disk_dev.class = &sd_disk_class; | |
3644 | dev_set_name(&sdkp->disk_dev, "%s", dev_name(dev)); | |
601e7638 | 3645 | |
fad45c30 | 3646 | error = device_add(&sdkp->disk_dev); |
265dfe8e | 3647 | if (error) { |
fad45c30 | 3648 | put_device(&sdkp->disk_dev); |
265dfe8e ML |
3649 | goto out; |
3650 | } | |
601e7638 | 3651 | |
478a8a05 | 3652 | dev_set_drvdata(dev, sdkp); |
601e7638 | 3653 | |
82a54da6 BVA |
3654 | gd->major = sd_major((index & 0xf0) >> 4); |
3655 | gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00); | |
a58bd768 | 3656 | gd->minors = SD_MINORS; |
82a54da6 BVA |
3657 | |
3658 | gd->fops = &sd_fops; | |
e7f76552 | 3659 | gd->private_data = sdkp; |
82a54da6 BVA |
3660 | |
3661 | /* defaults, until the device tells us otherwise */ | |
3662 | sdp->sector_size = 512; | |
3663 | sdkp->capacity = 0; | |
3664 | sdkp->media_present = 1; | |
3665 | sdkp->write_prot = 0; | |
3666 | sdkp->cache_override = 0; | |
3667 | sdkp->WCE = 0; | |
3668 | sdkp->RCD = 0; | |
3669 | sdkp->ATO = 0; | |
3670 | sdkp->first_scan = 1; | |
3671 | sdkp->max_medium_access_timeouts = SD_MAX_MEDIUM_TIMEOUTS; | |
3672 | ||
3673 | sd_revalidate_disk(gd); | |
3674 | ||
82a54da6 BVA |
3675 | if (sdp->removable) { |
3676 | gd->flags |= GENHD_FL_REMOVABLE; | |
3677 | gd->events |= DISK_EVENT_MEDIA_CHANGE; | |
3678 | gd->event_flags = DISK_EVENT_FLAG_POLL | DISK_EVENT_FLAG_UEVENT; | |
3679 | } | |
3680 | ||
3681 | blk_pm_runtime_init(sdp->request_queue, dev); | |
c74f8056 SC |
3682 | if (sdp->rpm_autosuspend) { |
3683 | pm_runtime_set_autosuspend_delay(dev, | |
3684 | sdp->host->hostt->rpm_autosuspend_delay); | |
3685 | } | |
2a7a891f LC |
3686 | |
3687 | error = device_add_disk(dev, gd, NULL); | |
3688 | if (error) { | |
fad45c30 | 3689 | put_device(&sdkp->disk_dev); |
7274ce05 | 3690 | put_disk(gd); |
2a7a891f LC |
3691 | goto out; |
3692 | } | |
3693 | ||
82a54da6 | 3694 | if (sdkp->security) { |
0610959f | 3695 | sdkp->opal_dev = init_opal_dev(sdkp, &sd_sec_submit); |
82a54da6 BVA |
3696 | if (sdkp->opal_dev) |
3697 | sd_printk(KERN_NOTICE, sdkp, "supports TCG Opal\n"); | |
3698 | } | |
3699 | ||
3700 | sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n", | |
3701 | sdp->removable ? "removable " : ""); | |
3702 | scsi_autopm_put_device(sdp); | |
1da177e4 LT |
3703 | |
3704 | return 0; | |
3705 | ||
f27bac27 | 3706 | out_free_index: |
94015080 | 3707 | ida_free(&sd_index_ida, index); |
6bdaa1f1 | 3708 | out_put: |
1da177e4 | 3709 | put_disk(gd); |
f170396c CIK |
3710 | out_free: |
3711 | kfree(sdkp); | |
6bdaa1f1 | 3712 | out: |
6fe8c1db | 3713 | scsi_autopm_put_device(sdp); |
1da177e4 LT |
3714 | return error; |
3715 | } | |
3716 | ||
3717 | /** | |
3718 | * sd_remove - called whenever a scsi disk (previously recognized by | |
3719 | * sd_probe) is detached from the system. It is called (potentially | |
3720 | * multiple times) during sd module unload. | |
f2a3313d | 3721 | * @dev: pointer to device object |
1da177e4 LT |
3722 | * |
3723 | * Note: this function is invoked from the scsi mid-level. | |
3724 | * This function potentially frees up a device name (e.g. /dev/sdc) | |
3725 | * that could be re-used by a subsequent sd_probe(). | |
3726 | * This function is not called when the built-in sd driver is "exit-ed". | |
3727 | **/ | |
3728 | static int sd_remove(struct device *dev) | |
3729 | { | |
9c63f7f6 | 3730 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
1da177e4 | 3731 | |
478a8a05 AS |
3732 | scsi_autopm_get_device(sdkp->device); |
3733 | ||
fad45c30 | 3734 | device_del(&sdkp->disk_dev); |
1da177e4 LT |
3735 | del_gendisk(sdkp->disk); |
3736 | sd_shutdown(dev); | |
39b7f1e2 | 3737 | |
9c63f7f6 | 3738 | put_disk(sdkp->disk); |
1da177e4 LT |
3739 | return 0; |
3740 | } | |
3741 | ||
ee959b00 | 3742 | static void scsi_disk_release(struct device *dev) |
1da177e4 | 3743 | { |
ee959b00 | 3744 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
c14a5726 | 3745 | |
94015080 | 3746 | ida_free(&sd_index_ida, sdkp->index); |
30c4fdc3 | 3747 | sd_zbc_free_zone_info(sdkp); |
c76c46fa | 3748 | put_device(&sdkp->device->sdev_gendev); |
534cf52a | 3749 | free_opal_dev(sdkp->opal_dev); |
5795eb44 | 3750 | |
1da177e4 LT |
3751 | kfree(sdkp); |
3752 | } | |
3753 | ||
cc5d2c8c | 3754 | static int sd_start_stop_device(struct scsi_disk *sdkp, int start) |
c3c94c5a TH |
3755 | { |
3756 | unsigned char cmd[6] = { START_STOP }; /* START_VALID */ | |
785538bf | 3757 | struct scsi_sense_hdr sshdr; |
af16cd63 MC |
3758 | const struct scsi_exec_args exec_args = { |
3759 | .sshdr = &sshdr, | |
3760 | .req_flags = BLK_MQ_REQ_PM, | |
3761 | }; | |
cc5d2c8c | 3762 | struct scsi_device *sdp = sdkp->device; |
785538bf | 3763 | int res; |
c3c94c5a TH |
3764 | |
3765 | if (start) | |
3766 | cmd[4] |= 1; /* START */ | |
3767 | ||
d2886ea3 SR |
3768 | if (sdp->start_stop_pwr_cond) |
3769 | cmd[4] |= start ? 1 << 4 : 3 << 4; /* Active or Standby */ | |
3770 | ||
c3c94c5a TH |
3771 | if (!scsi_device_online(sdp)) |
3772 | return -ENODEV; | |
3773 | ||
af16cd63 MC |
3774 | res = scsi_execute_cmd(sdp, cmd, REQ_OP_DRV_IN, NULL, 0, SD_TIMEOUT, |
3775 | sdkp->max_retries, &exec_args); | |
785538bf BVA |
3776 | if (res) { |
3777 | sd_print_result(sdkp, "Start/Stop Unit failed", res); | |
3778 | if (res > 0 && scsi_sense_valid(&sshdr)) { | |
3779 | sd_print_sense_hdr(sdkp, &sshdr); | |
3780 | /* 0x3a is medium not present */ | |
3781 | if (sshdr.asc == 0x3a) | |
3782 | res = 0; | |
3783 | } | |
3784 | } | |
c3c94c5a | 3785 | |
785538bf BVA |
3786 | /* SCSI error codes must not go to the generic layer */ |
3787 | if (res) | |
3788 | return -EIO; | |
3789 | ||
3790 | return 0; | |
c3c94c5a TH |
3791 | } |
3792 | ||
1da177e4 LT |
3793 | /* |
3794 | * Send a SYNCHRONIZE CACHE instruction down to the device through | |
3795 | * the normal SCSI command structure. Wait for the command to | |
3796 | * complete. | |
3797 | */ | |
3798 | static void sd_shutdown(struct device *dev) | |
3799 | { | |
3d9a1f53 | 3800 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
1da177e4 LT |
3801 | |
3802 | if (!sdkp) | |
3803 | return; /* this can happen */ | |
3804 | ||
54f57588 | 3805 | if (pm_runtime_suspended(dev)) |
3d9a1f53 | 3806 | return; |
54f57588 | 3807 | |
95897910 | 3808 | if (sdkp->WCE && sdkp->media_present) { |
e73aec82 | 3809 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
4fa83244 | 3810 | sd_sync_cache(sdkp, NULL); |
39b7f1e2 | 3811 | } |
c3c94c5a | 3812 | |
cc5d2c8c JB |
3813 | if (system_state != SYSTEM_RESTART && sdkp->device->manage_start_stop) { |
3814 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); | |
3815 | sd_start_stop_device(sdkp, 0); | |
c3c94c5a | 3816 | } |
39b7f1e2 | 3817 | } |
1da177e4 | 3818 | |
95897910 | 3819 | static int sd_suspend_common(struct device *dev, bool ignore_stop_errors) |
c3c94c5a | 3820 | { |
3d9a1f53 | 3821 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
4fa83244 | 3822 | struct scsi_sense_hdr sshdr; |
09ff92fe | 3823 | int ret = 0; |
c3c94c5a | 3824 | |
13b43891 AS |
3825 | if (!sdkp) /* E.g.: runtime suspend following sd_remove() */ |
3826 | return 0; | |
c3c94c5a | 3827 | |
95897910 | 3828 | if (sdkp->WCE && sdkp->media_present) { |
af4edb1d AH |
3829 | if (!sdkp->device->silence_suspend) |
3830 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); | |
4fa83244 DB |
3831 | ret = sd_sync_cache(sdkp, &sshdr); |
3832 | ||
95897910 ON |
3833 | if (ret) { |
3834 | /* ignore OFFLINE device */ | |
3835 | if (ret == -ENODEV) | |
4fa83244 DB |
3836 | return 0; |
3837 | ||
3838 | if (!scsi_sense_valid(&sshdr) || | |
3839 | sshdr.sense_key != ILLEGAL_REQUEST) | |
3840 | return ret; | |
3841 | ||
3842 | /* | |
3843 | * sshdr.sense_key == ILLEGAL_REQUEST means this drive | |
3844 | * doesn't support sync. There's not much to do and | |
3845 | * suspend shouldn't fail. | |
3846 | */ | |
ed91f7ed | 3847 | ret = 0; |
95897910 | 3848 | } |
c3c94c5a TH |
3849 | } |
3850 | ||
691e3d31 | 3851 | if (sdkp->device->manage_start_stop) { |
af4edb1d AH |
3852 | if (!sdkp->device->silence_suspend) |
3853 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); | |
95897910 | 3854 | /* an error is not worth aborting a system sleep */ |
cc5d2c8c | 3855 | ret = sd_start_stop_device(sdkp, 0); |
95897910 ON |
3856 | if (ignore_stop_errors) |
3857 | ret = 0; | |
c3c94c5a TH |
3858 | } |
3859 | ||
09ff92fe | 3860 | return ret; |
c3c94c5a TH |
3861 | } |
3862 | ||
95897910 ON |
3863 | static int sd_suspend_system(struct device *dev) |
3864 | { | |
9131bff6 BVA |
3865 | if (pm_runtime_suspended(dev)) |
3866 | return 0; | |
3867 | ||
95897910 ON |
3868 | return sd_suspend_common(dev, true); |
3869 | } | |
3870 | ||
3871 | static int sd_suspend_runtime(struct device *dev) | |
3872 | { | |
3873 | return sd_suspend_common(dev, false); | |
3874 | } | |
3875 | ||
c3c94c5a TH |
3876 | static int sd_resume(struct device *dev) |
3877 | { | |
3d9a1f53 | 3878 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
d80210f2 | 3879 | int ret; |
c3c94c5a | 3880 | |
13b43891 AS |
3881 | if (!sdkp) /* E.g.: runtime resume at the start of sd_probe() */ |
3882 | return 0; | |
3883 | ||
cc5d2c8c | 3884 | if (!sdkp->device->manage_start_stop) |
3d9a1f53 | 3885 | return 0; |
c3c94c5a | 3886 | |
cc5d2c8c | 3887 | sd_printk(KERN_NOTICE, sdkp, "Starting disk\n"); |
d80210f2 CH |
3888 | ret = sd_start_stop_device(sdkp, 1); |
3889 | if (!ret) | |
3890 | opal_unlock_from_suspend(sdkp->opal_dev); | |
3891 | return ret; | |
c3c94c5a TH |
3892 | } |
3893 | ||
1c957532 BVA |
3894 | static int sd_resume_system(struct device *dev) |
3895 | { | |
9131bff6 BVA |
3896 | if (pm_runtime_suspended(dev)) |
3897 | return 0; | |
3898 | ||
1c957532 BVA |
3899 | return sd_resume(dev); |
3900 | } | |
3901 | ||
ed4246d3 MK |
3902 | static int sd_resume_runtime(struct device *dev) |
3903 | { | |
3904 | struct scsi_disk *sdkp = dev_get_drvdata(dev); | |
85374b63 MC |
3905 | struct scsi_device *sdp; |
3906 | ||
3907 | if (!sdkp) /* E.g.: runtime resume at the start of sd_probe() */ | |
3908 | return 0; | |
3909 | ||
3910 | sdp = sdkp->device; | |
ed4246d3 MK |
3911 | |
3912 | if (sdp->ignore_media_change) { | |
3913 | /* clear the device's sense data */ | |
3914 | static const u8 cmd[10] = { REQUEST_SENSE }; | |
af16cd63 MC |
3915 | const struct scsi_exec_args exec_args = { |
3916 | .req_flags = BLK_MQ_REQ_PM, | |
3917 | }; | |
ed4246d3 | 3918 | |
af16cd63 MC |
3919 | if (scsi_execute_cmd(sdp, cmd, REQ_OP_DRV_IN, NULL, 0, |
3920 | sdp->request_queue->rq_timeout, 1, | |
3921 | &exec_args)) | |
ed4246d3 MK |
3922 | sd_printk(KERN_NOTICE, sdkp, |
3923 | "Failed to clear sense data\n"); | |
3924 | } | |
3925 | ||
3926 | return sd_resume(dev); | |
3927 | } | |
3928 | ||
1da177e4 LT |
3929 | /** |
3930 | * init_sd - entry point for this driver (both when built in or when | |
3931 | * a module). | |
3932 | * | |
3933 | * Note: this function registers this driver with the scsi mid-level. | |
3934 | **/ | |
3935 | static int __init init_sd(void) | |
3936 | { | |
5e4009ba | 3937 | int majors = 0, i, err; |
1da177e4 LT |
3938 | |
3939 | SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n")); | |
3940 | ||
0761df9c | 3941 | for (i = 0; i < SD_MAJORS; i++) { |
996e509b | 3942 | if (__register_blkdev(sd_major(i), "sd", sd_default_probe)) |
0761df9c HR |
3943 | continue; |
3944 | majors++; | |
0761df9c | 3945 | } |
1da177e4 LT |
3946 | |
3947 | if (!majors) | |
3948 | return -ENODEV; | |
3949 | ||
5e4009ba JG |
3950 | err = class_register(&sd_disk_class); |
3951 | if (err) | |
3952 | goto err_out; | |
6bdaa1f1 | 3953 | |
61cce6f6 JA |
3954 | sd_page_pool = mempool_create_page_pool(SD_MEMPOOL_SIZE, 0); |
3955 | if (!sd_page_pool) { | |
3956 | printk(KERN_ERR "sd: can't init discard page pool\n"); | |
3957 | err = -ENOMEM; | |
2b379516 | 3958 | goto err_out_class; |
61cce6f6 JA |
3959 | } |
3960 | ||
afd5e34b JD |
3961 | err = scsi_register_driver(&sd_template.gendrv); |
3962 | if (err) | |
3963 | goto err_out_driver; | |
3964 | ||
5e4009ba JG |
3965 | return 0; |
3966 | ||
afd5e34b | 3967 | err_out_driver: |
61cce6f6 | 3968 | mempool_destroy(sd_page_pool); |
5e4009ba JG |
3969 | err_out_class: |
3970 | class_unregister(&sd_disk_class); | |
3971 | err_out: | |
3972 | for (i = 0; i < SD_MAJORS; i++) | |
3973 | unregister_blkdev(sd_major(i), "sd"); | |
3974 | return err; | |
1da177e4 LT |
3975 | } |
3976 | ||
3977 | /** | |
3978 | * exit_sd - exit point for this driver (when it is a module). | |
3979 | * | |
3980 | * Note: this function unregisters this driver from the scsi mid-level. | |
3981 | **/ | |
3982 | static void __exit exit_sd(void) | |
3983 | { | |
3984 | int i; | |
3985 | ||
3986 | SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n")); | |
3987 | ||
afd5e34b | 3988 | scsi_unregister_driver(&sd_template.gendrv); |
61cce6f6 | 3989 | mempool_destroy(sd_page_pool); |
4e7392ec | 3990 | |
5e4009ba JG |
3991 | class_unregister(&sd_disk_class); |
3992 | ||
996e509b | 3993 | for (i = 0; i < SD_MAJORS; i++) |
1da177e4 LT |
3994 | unregister_blkdev(sd_major(i), "sd"); |
3995 | } | |
3996 | ||
1da177e4 LT |
3997 | module_init(init_sd); |
3998 | module_exit(exit_sd); | |
e73aec82 | 3999 | |
a35989a0 | 4000 | void sd_print_sense_hdr(struct scsi_disk *sdkp, struct scsi_sense_hdr *sshdr) |
e73aec82 | 4001 | { |
21045519 HR |
4002 | scsi_print_sense_hdr(sdkp->device, |
4003 | sdkp->disk ? sdkp->disk->disk_name : NULL, sshdr); | |
e73aec82 MP |
4004 | } |
4005 | ||
a35989a0 | 4006 | void sd_print_result(const struct scsi_disk *sdkp, const char *msg, int result) |
e73aec82 | 4007 | { |
ef61329d | 4008 | const char *hb_string = scsi_hostbyte_string(result); |
ef61329d | 4009 | |
54c29086 | 4010 | if (hb_string) |
ef61329d HR |
4011 | sd_printk(KERN_INFO, sdkp, |
4012 | "%s: Result: hostbyte=%s driverbyte=%s\n", msg, | |
4013 | hb_string ? hb_string : "invalid", | |
54c29086 | 4014 | "DRIVER_OK"); |
ef61329d HR |
4015 | else |
4016 | sd_printk(KERN_INFO, sdkp, | |
54c29086 HR |
4017 | "%s: Result: hostbyte=0x%02x driverbyte=%s\n", |
4018 | msg, host_byte(result), "DRIVER_OK"); | |
e73aec82 | 4019 | } |