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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> | |
41 | #include <linux/genhd.h> | |
42 | #include <linux/hdreg.h> | |
43 | #include <linux/errno.h> | |
44 | #include <linux/idr.h> | |
45 | #include <linux/interrupt.h> | |
46 | #include <linux/init.h> | |
47 | #include <linux/blkdev.h> | |
48 | #include <linux/blkpg.h> | |
bca6b067 | 49 | #include <linux/blk-pm.h> |
1da177e4 | 50 | #include <linux/delay.h> |
b81e0c23 | 51 | #include <linux/major.h> |
0b950672 | 52 | #include <linux/mutex.h> |
7404ad3b | 53 | #include <linux/string_helpers.h> |
5a0e3ad6 | 54 | #include <linux/slab.h> |
d80210f2 | 55 | #include <linux/sed-opal.h> |
54f57588 | 56 | #include <linux/pm_runtime.h> |
924d55b0 | 57 | #include <linux/pr.h> |
8475c811 | 58 | #include <linux/t10-pi.h> |
7c0f6ba6 | 59 | #include <linux/uaccess.h> |
8f76d151 | 60 | #include <asm/unaligned.h> |
1da177e4 LT |
61 | |
62 | #include <scsi/scsi.h> | |
63 | #include <scsi/scsi_cmnd.h> | |
64 | #include <scsi/scsi_dbg.h> | |
65 | #include <scsi/scsi_device.h> | |
66 | #include <scsi/scsi_driver.h> | |
67 | #include <scsi/scsi_eh.h> | |
68 | #include <scsi/scsi_host.h> | |
69 | #include <scsi/scsi_ioctl.h> | |
1da177e4 LT |
70 | #include <scsi/scsicam.h> |
71 | ||
aa91696e | 72 | #include "sd.h" |
a7a20d10 | 73 | #include "scsi_priv.h" |
1da177e4 LT |
74 | #include "scsi_logging.h" |
75 | ||
f018fa55 RH |
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 LT |
124 | |
125 | /* This semaphore is used to mediate the 0->1 reference get in the | |
126 | * face of object destruction (i.e. we can't allow a get on an | |
127 | * object after last put) */ | |
0b950672 | 128 | static DEFINE_MUTEX(sd_ref_mutex); |
1da177e4 | 129 | |
439d77f7 HS |
130 | static struct kmem_cache *sd_cdb_cache; |
131 | static mempool_t *sd_cdb_pool; | |
61cce6f6 | 132 | static mempool_t *sd_page_pool; |
9c2b9dba | 133 | static struct lock_class_key sd_bio_compl_lkclass; |
4e7392ec | 134 | |
6bdaa1f1 JB |
135 | static const char *sd_cache_types[] = { |
136 | "write through", "none", "write back", | |
137 | "write back, no read (daft)" | |
138 | }; | |
139 | ||
cb2fb68d VC |
140 | static void sd_set_flush_flag(struct scsi_disk *sdkp) |
141 | { | |
eb310e23 | 142 | bool wc = false, fua = false; |
cb2fb68d VC |
143 | |
144 | if (sdkp->WCE) { | |
eb310e23 | 145 | wc = true; |
cb2fb68d | 146 | if (sdkp->DPOFUA) |
eb310e23 | 147 | fua = true; |
cb2fb68d VC |
148 | } |
149 | ||
eb310e23 | 150 | blk_queue_write_cache(sdkp->disk->queue, wc, fua); |
cb2fb68d VC |
151 | } |
152 | ||
ee959b00 | 153 | static ssize_t |
e1ea2351 GKH |
154 | cache_type_store(struct device *dev, struct device_attribute *attr, |
155 | const char *buf, size_t count) | |
6bdaa1f1 | 156 | { |
4c11712a | 157 | int ct, rcd, wce, sp; |
ee959b00 | 158 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
159 | struct scsi_device *sdp = sdkp->device; |
160 | char buffer[64]; | |
161 | char *buffer_data; | |
162 | struct scsi_mode_data data; | |
163 | struct scsi_sense_hdr sshdr; | |
2ee3e26c | 164 | static const char temp[] = "temporary "; |
6bdaa1f1 JB |
165 | int len; |
166 | ||
89d94756 | 167 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) |
6bdaa1f1 JB |
168 | /* no cache control on RBC devices; theoretically they |
169 | * can do it, but there's probably so many exceptions | |
170 | * it's not worth the risk */ | |
171 | return -EINVAL; | |
172 | ||
39c60a09 JB |
173 | if (strncmp(buf, temp, sizeof(temp) - 1) == 0) { |
174 | buf += sizeof(temp) - 1; | |
175 | sdkp->cache_override = 1; | |
176 | } else { | |
177 | sdkp->cache_override = 0; | |
178 | } | |
179 | ||
4c11712a | 180 | ct = sysfs_match_string(sd_cache_types, buf); |
6bdaa1f1 JB |
181 | if (ct < 0) |
182 | return -EINVAL; | |
4c11712a | 183 | |
6bdaa1f1 | 184 | rcd = ct & 0x01 ? 1 : 0; |
2eefd57b | 185 | wce = (ct & 0x02) && !sdkp->write_prot ? 1 : 0; |
39c60a09 JB |
186 | |
187 | if (sdkp->cache_override) { | |
188 | sdkp->WCE = wce; | |
189 | sdkp->RCD = rcd; | |
cb2fb68d | 190 | sd_set_flush_flag(sdkp); |
39c60a09 JB |
191 | return count; |
192 | } | |
193 | ||
6bdaa1f1 | 194 | if (scsi_mode_sense(sdp, 0x08, 8, buffer, sizeof(buffer), SD_TIMEOUT, |
0610959f | 195 | sdkp->max_retries, &data, NULL)) |
6bdaa1f1 | 196 | return -EINVAL; |
a9312fb8 | 197 | len = min_t(size_t, sizeof(buffer), data.length - data.header_length - |
6bdaa1f1 JB |
198 | data.block_descriptor_length); |
199 | buffer_data = buffer + data.header_length + | |
200 | data.block_descriptor_length; | |
201 | buffer_data[2] &= ~0x05; | |
202 | buffer_data[2] |= wce << 2 | rcd; | |
203 | sp = buffer_data[0] & 0x80 ? 1 : 0; | |
2c5d16d6 | 204 | buffer_data[0] &= ~0x80; |
6bdaa1f1 | 205 | |
44759979 IM |
206 | /* |
207 | * Ensure WP, DPOFUA, and RESERVED fields are cleared in | |
208 | * received mode parameter buffer before doing MODE SELECT. | |
209 | */ | |
210 | data.device_specific = 0; | |
211 | ||
6bdaa1f1 | 212 | if (scsi_mode_select(sdp, 1, sp, 8, buffer_data, len, SD_TIMEOUT, |
0610959f | 213 | sdkp->max_retries, &data, &sshdr)) { |
6bdaa1f1 | 214 | if (scsi_sense_valid(&sshdr)) |
e73aec82 | 215 | sd_print_sense_hdr(sdkp, &sshdr); |
6bdaa1f1 JB |
216 | return -EINVAL; |
217 | } | |
033a1b98 | 218 | sd_revalidate_disk(sdkp->disk); |
6bdaa1f1 JB |
219 | return count; |
220 | } | |
221 | ||
ee959b00 | 222 | static ssize_t |
e1ea2351 GKH |
223 | manage_start_stop_show(struct device *dev, struct device_attribute *attr, |
224 | char *buf) | |
225 | { | |
226 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
227 | struct scsi_device *sdp = sdkp->device; | |
228 | ||
4c11712a | 229 | return sprintf(buf, "%u\n", sdp->manage_start_stop); |
e1ea2351 GKH |
230 | } |
231 | ||
232 | static ssize_t | |
233 | manage_start_stop_store(struct device *dev, struct device_attribute *attr, | |
234 | const char *buf, size_t count) | |
c3c94c5a | 235 | { |
ee959b00 | 236 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
c3c94c5a | 237 | struct scsi_device *sdp = sdkp->device; |
623401ee | 238 | bool v; |
c3c94c5a TH |
239 | |
240 | if (!capable(CAP_SYS_ADMIN)) | |
241 | return -EACCES; | |
242 | ||
623401ee | 243 | if (kstrtobool(buf, &v)) |
244 | return -EINVAL; | |
245 | ||
246 | sdp->manage_start_stop = v; | |
c3c94c5a TH |
247 | |
248 | return count; | |
249 | } | |
e1ea2351 | 250 | static DEVICE_ATTR_RW(manage_start_stop); |
c3c94c5a | 251 | |
ee959b00 | 252 | static ssize_t |
e1ea2351 GKH |
253 | allow_restart_show(struct device *dev, struct device_attribute *attr, char *buf) |
254 | { | |
255 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
256 | ||
4c11712a | 257 | return sprintf(buf, "%u\n", sdkp->device->allow_restart); |
e1ea2351 GKH |
258 | } |
259 | ||
260 | static ssize_t | |
261 | allow_restart_store(struct device *dev, struct device_attribute *attr, | |
262 | const char *buf, size_t count) | |
a144c5ae | 263 | { |
658e9a6d | 264 | bool v; |
ee959b00 | 265 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
a144c5ae BK |
266 | struct scsi_device *sdp = sdkp->device; |
267 | ||
268 | if (!capable(CAP_SYS_ADMIN)) | |
269 | return -EACCES; | |
270 | ||
89d94756 | 271 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) |
a144c5ae BK |
272 | return -EINVAL; |
273 | ||
658e9a6d | 274 | if (kstrtobool(buf, &v)) |
275 | return -EINVAL; | |
276 | ||
277 | sdp->allow_restart = v; | |
a144c5ae BK |
278 | |
279 | return count; | |
280 | } | |
e1ea2351 | 281 | static DEVICE_ATTR_RW(allow_restart); |
a144c5ae | 282 | |
ee959b00 | 283 | static ssize_t |
e1ea2351 | 284 | cache_type_show(struct device *dev, struct device_attribute *attr, char *buf) |
6bdaa1f1 | 285 | { |
ee959b00 | 286 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
287 | int ct = sdkp->RCD + 2*sdkp->WCE; |
288 | ||
4c11712a | 289 | return sprintf(buf, "%s\n", sd_cache_types[ct]); |
6bdaa1f1 | 290 | } |
e1ea2351 | 291 | static DEVICE_ATTR_RW(cache_type); |
6bdaa1f1 | 292 | |
ee959b00 | 293 | static ssize_t |
e1ea2351 | 294 | FUA_show(struct device *dev, struct device_attribute *attr, char *buf) |
6bdaa1f1 | 295 | { |
ee959b00 | 296 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 | 297 | |
4c11712a | 298 | return sprintf(buf, "%u\n", sdkp->DPOFUA); |
6bdaa1f1 | 299 | } |
e1ea2351 | 300 | static DEVICE_ATTR_RO(FUA); |
6bdaa1f1 | 301 | |
ee959b00 | 302 | static ssize_t |
e1ea2351 GKH |
303 | protection_type_show(struct device *dev, struct device_attribute *attr, |
304 | char *buf) | |
e0597d70 MP |
305 | { |
306 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
307 | ||
4c11712a | 308 | return sprintf(buf, "%u\n", sdkp->protection_type); |
e0597d70 MP |
309 | } |
310 | ||
8172499a | 311 | static ssize_t |
e1ea2351 GKH |
312 | protection_type_store(struct device *dev, struct device_attribute *attr, |
313 | const char *buf, size_t count) | |
8172499a MP |
314 | { |
315 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
316 | unsigned int val; | |
317 | int err; | |
318 | ||
319 | if (!capable(CAP_SYS_ADMIN)) | |
320 | return -EACCES; | |
321 | ||
322 | err = kstrtouint(buf, 10, &val); | |
323 | ||
324 | if (err) | |
325 | return err; | |
326 | ||
830cc351 | 327 | if (val <= T10_PI_TYPE3_PROTECTION) |
8172499a MP |
328 | sdkp->protection_type = val; |
329 | ||
330 | return count; | |
331 | } | |
e1ea2351 | 332 | static DEVICE_ATTR_RW(protection_type); |
8172499a | 333 | |
518fa8e3 | 334 | static ssize_t |
e1ea2351 GKH |
335 | protection_mode_show(struct device *dev, struct device_attribute *attr, |
336 | char *buf) | |
518fa8e3 MP |
337 | { |
338 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
339 | struct scsi_device *sdp = sdkp->device; | |
340 | unsigned int dif, dix; | |
341 | ||
342 | dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type); | |
343 | dix = scsi_host_dix_capable(sdp->host, sdkp->protection_type); | |
344 | ||
8475c811 | 345 | if (!dix && scsi_host_dix_capable(sdp->host, T10_PI_TYPE0_PROTECTION)) { |
518fa8e3 MP |
346 | dif = 0; |
347 | dix = 1; | |
348 | } | |
349 | ||
350 | if (!dif && !dix) | |
4c11712a | 351 | return sprintf(buf, "none\n"); |
518fa8e3 | 352 | |
4c11712a | 353 | return sprintf(buf, "%s%u\n", dix ? "dix" : "dif", dif); |
518fa8e3 | 354 | } |
e1ea2351 | 355 | static DEVICE_ATTR_RO(protection_mode); |
518fa8e3 | 356 | |
e0597d70 | 357 | static ssize_t |
e1ea2351 | 358 | app_tag_own_show(struct device *dev, struct device_attribute *attr, char *buf) |
e0597d70 MP |
359 | { |
360 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
361 | ||
4c11712a | 362 | return sprintf(buf, "%u\n", sdkp->ATO); |
e0597d70 | 363 | } |
e1ea2351 | 364 | static DEVICE_ATTR_RO(app_tag_own); |
e0597d70 | 365 | |
e339c1a7 | 366 | static ssize_t |
e1ea2351 GKH |
367 | thin_provisioning_show(struct device *dev, struct device_attribute *attr, |
368 | char *buf) | |
e339c1a7 MP |
369 | { |
370 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
371 | ||
4c11712a | 372 | return sprintf(buf, "%u\n", sdkp->lbpme); |
c98a0eb0 | 373 | } |
e1ea2351 | 374 | static DEVICE_ATTR_RO(thin_provisioning); |
c98a0eb0 | 375 | |
4c11712a | 376 | /* sysfs_match_string() requires dense arrays */ |
c98a0eb0 MP |
377 | static const char *lbp_mode[] = { |
378 | [SD_LBP_FULL] = "full", | |
379 | [SD_LBP_UNMAP] = "unmap", | |
380 | [SD_LBP_WS16] = "writesame_16", | |
381 | [SD_LBP_WS10] = "writesame_10", | |
382 | [SD_LBP_ZERO] = "writesame_zero", | |
383 | [SD_LBP_DISABLE] = "disabled", | |
384 | }; | |
385 | ||
386 | static ssize_t | |
e1ea2351 GKH |
387 | provisioning_mode_show(struct device *dev, struct device_attribute *attr, |
388 | char *buf) | |
c98a0eb0 MP |
389 | { |
390 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
391 | ||
4c11712a | 392 | return sprintf(buf, "%s\n", lbp_mode[sdkp->provisioning_mode]); |
c98a0eb0 MP |
393 | } |
394 | ||
395 | static ssize_t | |
e1ea2351 GKH |
396 | provisioning_mode_store(struct device *dev, struct device_attribute *attr, |
397 | const char *buf, size_t count) | |
c98a0eb0 MP |
398 | { |
399 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
400 | struct scsi_device *sdp = sdkp->device; | |
4c11712a | 401 | int mode; |
c98a0eb0 MP |
402 | |
403 | if (!capable(CAP_SYS_ADMIN)) | |
404 | return -EACCES; | |
405 | ||
89d94756 HR |
406 | if (sd_is_zoned(sdkp)) { |
407 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
408 | return count; | |
409 | } | |
410 | ||
c98a0eb0 MP |
411 | if (sdp->type != TYPE_DISK) |
412 | return -EINVAL; | |
413 | ||
4c11712a MP |
414 | mode = sysfs_match_string(lbp_mode, buf); |
415 | if (mode < 0) | |
c98a0eb0 MP |
416 | return -EINVAL; |
417 | ||
4c11712a MP |
418 | sd_config_discard(sdkp, mode); |
419 | ||
c98a0eb0 | 420 | return count; |
e339c1a7 | 421 | } |
e1ea2351 | 422 | static DEVICE_ATTR_RW(provisioning_mode); |
e339c1a7 | 423 | |
4c11712a | 424 | /* sysfs_match_string() requires dense arrays */ |
e6bd9312 MP |
425 | static const char *zeroing_mode[] = { |
426 | [SD_ZERO_WRITE] = "write", | |
427 | [SD_ZERO_WS] = "writesame", | |
428 | [SD_ZERO_WS16_UNMAP] = "writesame_16_unmap", | |
429 | [SD_ZERO_WS10_UNMAP] = "writesame_10_unmap", | |
430 | }; | |
431 | ||
432 | static ssize_t | |
433 | zeroing_mode_show(struct device *dev, struct device_attribute *attr, | |
434 | char *buf) | |
435 | { | |
436 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
437 | ||
4c11712a | 438 | return sprintf(buf, "%s\n", zeroing_mode[sdkp->zeroing_mode]); |
e6bd9312 MP |
439 | } |
440 | ||
441 | static ssize_t | |
442 | zeroing_mode_store(struct device *dev, struct device_attribute *attr, | |
443 | const char *buf, size_t count) | |
444 | { | |
445 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
4c11712a | 446 | int mode; |
e6bd9312 MP |
447 | |
448 | if (!capable(CAP_SYS_ADMIN)) | |
449 | return -EACCES; | |
450 | ||
4c11712a MP |
451 | mode = sysfs_match_string(zeroing_mode, buf); |
452 | if (mode < 0) | |
e6bd9312 MP |
453 | return -EINVAL; |
454 | ||
4c11712a MP |
455 | sdkp->zeroing_mode = mode; |
456 | ||
e6bd9312 MP |
457 | return count; |
458 | } | |
459 | static DEVICE_ATTR_RW(zeroing_mode); | |
460 | ||
18a4d0a2 | 461 | static ssize_t |
e1ea2351 GKH |
462 | max_medium_access_timeouts_show(struct device *dev, |
463 | struct device_attribute *attr, char *buf) | |
18a4d0a2 MP |
464 | { |
465 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
466 | ||
4c11712a | 467 | return sprintf(buf, "%u\n", sdkp->max_medium_access_timeouts); |
18a4d0a2 MP |
468 | } |
469 | ||
470 | static ssize_t | |
e1ea2351 GKH |
471 | max_medium_access_timeouts_store(struct device *dev, |
472 | struct device_attribute *attr, const char *buf, | |
473 | size_t count) | |
18a4d0a2 MP |
474 | { |
475 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
476 | int err; | |
477 | ||
478 | if (!capable(CAP_SYS_ADMIN)) | |
479 | return -EACCES; | |
480 | ||
481 | err = kstrtouint(buf, 10, &sdkp->max_medium_access_timeouts); | |
482 | ||
483 | return err ? err : count; | |
484 | } | |
e1ea2351 | 485 | static DEVICE_ATTR_RW(max_medium_access_timeouts); |
18a4d0a2 | 486 | |
5db44863 | 487 | static ssize_t |
e1ea2351 GKH |
488 | max_write_same_blocks_show(struct device *dev, struct device_attribute *attr, |
489 | char *buf) | |
5db44863 MP |
490 | { |
491 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
492 | ||
4c11712a | 493 | return sprintf(buf, "%u\n", sdkp->max_ws_blocks); |
5db44863 MP |
494 | } |
495 | ||
496 | static ssize_t | |
e1ea2351 GKH |
497 | max_write_same_blocks_store(struct device *dev, struct device_attribute *attr, |
498 | const char *buf, size_t count) | |
5db44863 MP |
499 | { |
500 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
501 | struct scsi_device *sdp = sdkp->device; | |
502 | unsigned long max; | |
503 | int err; | |
504 | ||
505 | if (!capable(CAP_SYS_ADMIN)) | |
506 | return -EACCES; | |
507 | ||
89d94756 | 508 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) |
5db44863 MP |
509 | return -EINVAL; |
510 | ||
511 | err = kstrtoul(buf, 10, &max); | |
512 | ||
513 | if (err) | |
514 | return err; | |
515 | ||
516 | if (max == 0) | |
517 | sdp->no_write_same = 1; | |
66c28f97 MP |
518 | else if (max <= SD_MAX_WS16_BLOCKS) { |
519 | sdp->no_write_same = 0; | |
5db44863 | 520 | sdkp->max_ws_blocks = max; |
66c28f97 | 521 | } |
5db44863 MP |
522 | |
523 | sd_config_write_same(sdkp); | |
524 | ||
525 | return count; | |
526 | } | |
e1ea2351 GKH |
527 | static DEVICE_ATTR_RW(max_write_same_blocks); |
528 | ||
c5f88522 DLM |
529 | static ssize_t |
530 | zoned_cap_show(struct device *dev, struct device_attribute *attr, char *buf) | |
531 | { | |
532 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
533 | ||
534 | if (sdkp->device->type == TYPE_ZBC) | |
535 | return sprintf(buf, "host-managed\n"); | |
536 | if (sdkp->zoned == 1) | |
537 | return sprintf(buf, "host-aware\n"); | |
538 | if (sdkp->zoned == 2) | |
539 | return sprintf(buf, "drive-managed\n"); | |
540 | return sprintf(buf, "none\n"); | |
541 | } | |
542 | static DEVICE_ATTR_RO(zoned_cap); | |
543 | ||
0610959f MC |
544 | static ssize_t |
545 | max_retries_store(struct device *dev, struct device_attribute *attr, | |
546 | const char *buf, size_t count) | |
547 | { | |
548 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
549 | struct scsi_device *sdev = sdkp->device; | |
550 | int retries, err; | |
551 | ||
552 | err = kstrtoint(buf, 10, &retries); | |
553 | if (err) | |
554 | return err; | |
555 | ||
556 | if (retries == SCSI_CMD_RETRIES_NO_LIMIT || retries <= SD_MAX_RETRIES) { | |
557 | sdkp->max_retries = retries; | |
558 | return count; | |
559 | } | |
560 | ||
561 | sdev_printk(KERN_ERR, sdev, "max_retries must be between -1 and %d\n", | |
562 | SD_MAX_RETRIES); | |
563 | return -EINVAL; | |
564 | } | |
565 | ||
566 | static ssize_t | |
567 | max_retries_show(struct device *dev, struct device_attribute *attr, | |
568 | char *buf) | |
569 | { | |
570 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
571 | ||
572 | return sprintf(buf, "%d\n", sdkp->max_retries); | |
573 | } | |
574 | ||
575 | static DEVICE_ATTR_RW(max_retries); | |
576 | ||
e1ea2351 GKH |
577 | static struct attribute *sd_disk_attrs[] = { |
578 | &dev_attr_cache_type.attr, | |
579 | &dev_attr_FUA.attr, | |
580 | &dev_attr_allow_restart.attr, | |
581 | &dev_attr_manage_start_stop.attr, | |
582 | &dev_attr_protection_type.attr, | |
583 | &dev_attr_protection_mode.attr, | |
584 | &dev_attr_app_tag_own.attr, | |
585 | &dev_attr_thin_provisioning.attr, | |
586 | &dev_attr_provisioning_mode.attr, | |
e6bd9312 | 587 | &dev_attr_zeroing_mode.attr, |
e1ea2351 GKH |
588 | &dev_attr_max_write_same_blocks.attr, |
589 | &dev_attr_max_medium_access_timeouts.attr, | |
c5f88522 | 590 | &dev_attr_zoned_cap.attr, |
0610959f | 591 | &dev_attr_max_retries.attr, |
e1ea2351 | 592 | NULL, |
6bdaa1f1 | 593 | }; |
e1ea2351 | 594 | ATTRIBUTE_GROUPS(sd_disk); |
6bdaa1f1 JB |
595 | |
596 | static struct class sd_disk_class = { | |
597 | .name = "scsi_disk", | |
598 | .owner = THIS_MODULE, | |
ee959b00 | 599 | .dev_release = scsi_disk_release, |
e1ea2351 | 600 | .dev_groups = sd_disk_groups, |
6bdaa1f1 | 601 | }; |
1da177e4 | 602 | |
691e3d31 | 603 | static const struct dev_pm_ops sd_pm_ops = { |
95897910 | 604 | .suspend = sd_suspend_system, |
1c957532 | 605 | .resume = sd_resume_system, |
95897910 | 606 | .poweroff = sd_suspend_system, |
1c957532 | 607 | .restore = sd_resume_system, |
95897910 | 608 | .runtime_suspend = sd_suspend_runtime, |
ed4246d3 | 609 | .runtime_resume = sd_resume_runtime, |
691e3d31 AL |
610 | }; |
611 | ||
1da177e4 | 612 | static struct scsi_driver sd_template = { |
1da177e4 LT |
613 | .gendrv = { |
614 | .name = "sd", | |
3af6b352 | 615 | .owner = THIS_MODULE, |
1da177e4 | 616 | .probe = sd_probe, |
f049cf1a | 617 | .probe_type = PROBE_PREFER_ASYNCHRONOUS, |
1da177e4 LT |
618 | .remove = sd_remove, |
619 | .shutdown = sd_shutdown, | |
691e3d31 | 620 | .pm = &sd_pm_ops, |
1da177e4 LT |
621 | }, |
622 | .rescan = sd_rescan, | |
a1b73fc1 CH |
623 | .init_command = sd_init_command, |
624 | .uninit_command = sd_uninit_command, | |
7b3d9545 | 625 | .done = sd_done, |
18a4d0a2 | 626 | .eh_action = sd_eh_action, |
7a38dc0b | 627 | .eh_reset = sd_eh_reset, |
1da177e4 LT |
628 | }; |
629 | ||
0761df9c | 630 | /* |
996e509b CH |
631 | * Don't request a new module, as that could deadlock in multipath |
632 | * environment. | |
0761df9c | 633 | */ |
996e509b | 634 | static void sd_default_probe(dev_t devt) |
0761df9c | 635 | { |
0761df9c HR |
636 | } |
637 | ||
1da177e4 LT |
638 | /* |
639 | * Device no to disk mapping: | |
640 | * | |
641 | * major disc2 disc p1 | |
642 | * |............|.............|....|....| <- dev_t | |
643 | * 31 20 19 8 7 4 3 0 | |
644 | * | |
645 | * Inside a major, we have 16k disks, however mapped non- | |
646 | * contiguously. The first 16 disks are for major0, the next | |
647 | * ones with major1, ... Disk 256 is for major0 again, disk 272 | |
648 | * for major1, ... | |
649 | * As we stay compatible with our numbering scheme, we can reuse | |
650 | * the well-know SCSI majors 8, 65--71, 136--143. | |
651 | */ | |
652 | static int sd_major(int major_idx) | |
653 | { | |
654 | switch (major_idx) { | |
655 | case 0: | |
656 | return SCSI_DISK0_MAJOR; | |
657 | case 1 ... 7: | |
658 | return SCSI_DISK1_MAJOR + major_idx - 1; | |
659 | case 8 ... 15: | |
660 | return SCSI_DISK8_MAJOR + major_idx - 8; | |
661 | default: | |
662 | BUG(); | |
663 | return 0; /* shut up gcc */ | |
664 | } | |
665 | } | |
666 | ||
3d9a1f53 | 667 | static struct scsi_disk *scsi_disk_get(struct gendisk *disk) |
1da177e4 LT |
668 | { |
669 | struct scsi_disk *sdkp = NULL; | |
670 | ||
3d9a1f53 CH |
671 | mutex_lock(&sd_ref_mutex); |
672 | ||
39b7f1e2 AS |
673 | if (disk->private_data) { |
674 | sdkp = scsi_disk(disk); | |
675 | if (scsi_device_get(sdkp->device) == 0) | |
ee959b00 | 676 | get_device(&sdkp->dev); |
39b7f1e2 AS |
677 | else |
678 | sdkp = NULL; | |
679 | } | |
0b950672 | 680 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
681 | return sdkp; |
682 | } | |
683 | ||
684 | static void scsi_disk_put(struct scsi_disk *sdkp) | |
685 | { | |
686 | struct scsi_device *sdev = sdkp->device; | |
687 | ||
0b950672 | 688 | mutex_lock(&sd_ref_mutex); |
ee959b00 | 689 | put_device(&sdkp->dev); |
1da177e4 | 690 | scsi_device_put(sdev); |
0b950672 | 691 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
692 | } |
693 | ||
d80210f2 CH |
694 | #ifdef CONFIG_BLK_SED_OPAL |
695 | static int sd_sec_submit(void *data, u16 spsp, u8 secp, void *buffer, | |
696 | size_t len, bool send) | |
697 | { | |
0610959f MC |
698 | struct scsi_disk *sdkp = data; |
699 | struct scsi_device *sdev = sdkp->device; | |
d80210f2 CH |
700 | u8 cdb[12] = { 0, }; |
701 | int ret; | |
702 | ||
703 | cdb[0] = send ? SECURITY_PROTOCOL_OUT : SECURITY_PROTOCOL_IN; | |
704 | cdb[1] = secp; | |
705 | put_unaligned_be16(spsp, &cdb[2]); | |
706 | put_unaligned_be32(len, &cdb[6]); | |
707 | ||
aaf15f8c BVA |
708 | ret = scsi_execute(sdev, cdb, send ? DMA_TO_DEVICE : DMA_FROM_DEVICE, |
709 | buffer, len, NULL, NULL, SD_TIMEOUT, sdkp->max_retries, 0, | |
710 | RQF_PM, NULL); | |
d80210f2 CH |
711 | return ret <= 0 ? ret : -EIO; |
712 | } | |
713 | #endif /* CONFIG_BLK_SED_OPAL */ | |
714 | ||
082c2cd2 JG |
715 | /* |
716 | * Look up the DIX operation based on whether the command is read or | |
717 | * write and whether dix and dif are enabled. | |
718 | */ | |
719 | static unsigned int sd_prot_op(bool write, bool dix, bool dif) | |
720 | { | |
721 | /* Lookup table: bit 2 (write), bit 1 (dix), bit 0 (dif) */ | |
722 | static const unsigned int ops[] = { /* wrt dix dif */ | |
723 | SCSI_PROT_NORMAL, /* 0 0 0 */ | |
724 | SCSI_PROT_READ_STRIP, /* 0 0 1 */ | |
725 | SCSI_PROT_READ_INSERT, /* 0 1 0 */ | |
726 | SCSI_PROT_READ_PASS, /* 0 1 1 */ | |
727 | SCSI_PROT_NORMAL, /* 1 0 0 */ | |
728 | SCSI_PROT_WRITE_INSERT, /* 1 0 1 */ | |
729 | SCSI_PROT_WRITE_STRIP, /* 1 1 0 */ | |
730 | SCSI_PROT_WRITE_PASS, /* 1 1 1 */ | |
731 | }; | |
732 | ||
733 | return ops[write << 2 | dix << 1 | dif]; | |
734 | } | |
735 | ||
736 | /* | |
737 | * Returns a mask of the protection flags that are valid for a given DIX | |
738 | * operation. | |
739 | */ | |
740 | static unsigned int sd_prot_flag_mask(unsigned int prot_op) | |
741 | { | |
742 | static const unsigned int flag_mask[] = { | |
743 | [SCSI_PROT_NORMAL] = 0, | |
744 | ||
745 | [SCSI_PROT_READ_STRIP] = SCSI_PROT_TRANSFER_PI | | |
746 | SCSI_PROT_GUARD_CHECK | | |
747 | SCSI_PROT_REF_CHECK | | |
748 | SCSI_PROT_REF_INCREMENT, | |
749 | ||
750 | [SCSI_PROT_READ_INSERT] = SCSI_PROT_REF_INCREMENT | | |
751 | SCSI_PROT_IP_CHECKSUM, | |
752 | ||
753 | [SCSI_PROT_READ_PASS] = SCSI_PROT_TRANSFER_PI | | |
754 | SCSI_PROT_GUARD_CHECK | | |
755 | SCSI_PROT_REF_CHECK | | |
756 | SCSI_PROT_REF_INCREMENT | | |
757 | SCSI_PROT_IP_CHECKSUM, | |
758 | ||
759 | [SCSI_PROT_WRITE_INSERT] = SCSI_PROT_TRANSFER_PI | | |
760 | SCSI_PROT_REF_INCREMENT, | |
761 | ||
762 | [SCSI_PROT_WRITE_STRIP] = SCSI_PROT_GUARD_CHECK | | |
763 | SCSI_PROT_REF_CHECK | | |
764 | SCSI_PROT_REF_INCREMENT | | |
765 | SCSI_PROT_IP_CHECKSUM, | |
766 | ||
767 | [SCSI_PROT_WRITE_PASS] = SCSI_PROT_TRANSFER_PI | | |
768 | SCSI_PROT_GUARD_CHECK | | |
769 | SCSI_PROT_REF_CHECK | | |
770 | SCSI_PROT_REF_INCREMENT | | |
771 | SCSI_PROT_IP_CHECKSUM, | |
772 | }; | |
773 | ||
774 | return flag_mask[prot_op]; | |
775 | } | |
776 | ||
c611529e MP |
777 | static unsigned char sd_setup_protect_cmnd(struct scsi_cmnd *scmd, |
778 | unsigned int dix, unsigned int dif) | |
35e1a5d9 | 779 | { |
5999ccff BVA |
780 | struct request *rq = scsi_cmd_to_rq(scmd); |
781 | struct bio *bio = rq->bio; | |
782 | unsigned int prot_op = sd_prot_op(rq_data_dir(rq), dix, dif); | |
c611529e MP |
783 | unsigned int protect = 0; |
784 | ||
785 | if (dix) { /* DIX Type 0, 1, 2, 3 */ | |
786 | if (bio_integrity_flagged(bio, BIP_IP_CHECKSUM)) | |
787 | scmd->prot_flags |= SCSI_PROT_IP_CHECKSUM; | |
788 | ||
789 | if (bio_integrity_flagged(bio, BIP_CTRL_NOCHECK) == false) | |
790 | scmd->prot_flags |= SCSI_PROT_GUARD_CHECK; | |
791 | } | |
792 | ||
8475c811 | 793 | if (dif != T10_PI_TYPE3_PROTECTION) { /* DIX/DIF Type 0, 1, 2 */ |
c611529e MP |
794 | scmd->prot_flags |= SCSI_PROT_REF_INCREMENT; |
795 | ||
796 | if (bio_integrity_flagged(bio, BIP_CTRL_NOCHECK) == false) | |
797 | scmd->prot_flags |= SCSI_PROT_REF_CHECK; | |
798 | } | |
799 | ||
800 | if (dif) { /* DIX/DIF Type 1, 2, 3 */ | |
801 | scmd->prot_flags |= SCSI_PROT_TRANSFER_PI; | |
802 | ||
803 | if (bio_integrity_flagged(bio, BIP_DISK_NOCHECK)) | |
804 | protect = 3 << 5; /* Disable target PI checking */ | |
805 | else | |
806 | protect = 1 << 5; /* Enable target PI checking */ | |
35e1a5d9 MP |
807 | } |
808 | ||
809 | scsi_set_prot_op(scmd, prot_op); | |
810 | scsi_set_prot_type(scmd, dif); | |
c611529e MP |
811 | scmd->prot_flags &= sd_prot_flag_mask(prot_op); |
812 | ||
813 | return protect; | |
35e1a5d9 MP |
814 | } |
815 | ||
c98a0eb0 MP |
816 | static void sd_config_discard(struct scsi_disk *sdkp, unsigned int mode) |
817 | { | |
818 | struct request_queue *q = sdkp->disk->queue; | |
819 | unsigned int logical_block_size = sdkp->device->sector_size; | |
820 | unsigned int max_blocks = 0; | |
821 | ||
bcd069bb MP |
822 | q->limits.discard_alignment = |
823 | sdkp->unmap_alignment * logical_block_size; | |
824 | q->limits.discard_granularity = | |
825 | max(sdkp->physical_block_size, | |
826 | sdkp->unmap_granularity * logical_block_size); | |
89730393 MP |
827 | sdkp->provisioning_mode = mode; |
828 | ||
c98a0eb0 MP |
829 | switch (mode) { |
830 | ||
4c11712a | 831 | case SD_LBP_FULL: |
c98a0eb0 | 832 | case SD_LBP_DISABLE: |
2bb4cd5c | 833 | blk_queue_max_discard_sectors(q, 0); |
8b904b5b | 834 | blk_queue_flag_clear(QUEUE_FLAG_DISCARD, q); |
c98a0eb0 MP |
835 | return; |
836 | ||
837 | case SD_LBP_UNMAP: | |
5db44863 MP |
838 | max_blocks = min_not_zero(sdkp->max_unmap_blocks, |
839 | (u32)SD_MAX_WS16_BLOCKS); | |
c98a0eb0 MP |
840 | break; |
841 | ||
842 | case SD_LBP_WS16: | |
28a0bc41 MP |
843 | if (sdkp->device->unmap_limit_for_ws) |
844 | max_blocks = sdkp->max_unmap_blocks; | |
845 | else | |
846 | max_blocks = sdkp->max_ws_blocks; | |
847 | ||
848 | max_blocks = min_not_zero(max_blocks, (u32)SD_MAX_WS16_BLOCKS); | |
c98a0eb0 MP |
849 | break; |
850 | ||
851 | case SD_LBP_WS10: | |
28a0bc41 MP |
852 | if (sdkp->device->unmap_limit_for_ws) |
853 | max_blocks = sdkp->max_unmap_blocks; | |
854 | else | |
855 | max_blocks = sdkp->max_ws_blocks; | |
856 | ||
857 | max_blocks = min_not_zero(max_blocks, (u32)SD_MAX_WS10_BLOCKS); | |
c98a0eb0 MP |
858 | break; |
859 | ||
860 | case SD_LBP_ZERO: | |
5db44863 MP |
861 | max_blocks = min_not_zero(sdkp->max_ws_blocks, |
862 | (u32)SD_MAX_WS10_BLOCKS); | |
c98a0eb0 MP |
863 | break; |
864 | } | |
865 | ||
2bb4cd5c | 866 | blk_queue_max_discard_sectors(q, max_blocks * (logical_block_size >> 9)); |
8b904b5b | 867 | blk_queue_flag_set(QUEUE_FLAG_DISCARD, q); |
c98a0eb0 MP |
868 | } |
869 | ||
159b2cbf | 870 | static blk_status_t sd_setup_unmap_cmnd(struct scsi_cmnd *cmd) |
e339c1a7 | 871 | { |
6a7b4398 | 872 | struct scsi_device *sdp = cmd->device; |
5999ccff | 873 | struct request *rq = scsi_cmd_to_rq(cmd); |
f3fa33ac | 874 | struct scsi_disk *sdkp = scsi_disk(rq->q->disk); |
c6c93fdd MP |
875 | u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq)); |
876 | u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq)); | |
81d926e8 | 877 | unsigned int data_len = 24; |
c98a0eb0 | 878 | char *buf; |
e339c1a7 | 879 | |
61cce6f6 | 880 | rq->special_vec.bv_page = mempool_alloc(sd_page_pool, GFP_ATOMIC); |
81d926e8 | 881 | if (!rq->special_vec.bv_page) |
159b2cbf | 882 | return BLK_STS_RESOURCE; |
61cce6f6 | 883 | clear_highpage(rq->special_vec.bv_page); |
81d926e8 CH |
884 | rq->special_vec.bv_offset = 0; |
885 | rq->special_vec.bv_len = data_len; | |
886 | rq->rq_flags |= RQF_SPECIAL_PAYLOAD; | |
66ac0280 | 887 | |
81d926e8 CH |
888 | cmd->cmd_len = 10; |
889 | cmd->cmnd[0] = UNMAP; | |
890 | cmd->cmnd[8] = 24; | |
e339c1a7 | 891 | |
c3c77056 | 892 | buf = bvec_virt(&rq->special_vec); |
81d926e8 CH |
893 | put_unaligned_be16(6 + 16, &buf[0]); |
894 | put_unaligned_be16(16, &buf[2]); | |
c6c93fdd MP |
895 | put_unaligned_be64(lba, &buf[8]); |
896 | put_unaligned_be32(nr_blocks, &buf[16]); | |
e339c1a7 | 897 | |
0610959f | 898 | cmd->allowed = sdkp->max_retries; |
81d926e8 CH |
899 | cmd->transfersize = data_len; |
900 | rq->timeout = SD_TIMEOUT; | |
e339c1a7 | 901 | |
7007e9dd | 902 | return scsi_alloc_sgtables(cmd); |
81d926e8 | 903 | } |
c98a0eb0 | 904 | |
159b2cbf CH |
905 | static blk_status_t sd_setup_write_same16_cmnd(struct scsi_cmnd *cmd, |
906 | bool unmap) | |
81d926e8 CH |
907 | { |
908 | struct scsi_device *sdp = cmd->device; | |
5999ccff | 909 | struct request *rq = scsi_cmd_to_rq(cmd); |
f3fa33ac | 910 | struct scsi_disk *sdkp = scsi_disk(rq->q->disk); |
c6c93fdd MP |
911 | u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq)); |
912 | u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq)); | |
81d926e8 | 913 | u32 data_len = sdp->sector_size; |
c98a0eb0 | 914 | |
61cce6f6 | 915 | rq->special_vec.bv_page = mempool_alloc(sd_page_pool, GFP_ATOMIC); |
81d926e8 | 916 | if (!rq->special_vec.bv_page) |
159b2cbf | 917 | return BLK_STS_RESOURCE; |
61cce6f6 | 918 | clear_highpage(rq->special_vec.bv_page); |
81d926e8 CH |
919 | rq->special_vec.bv_offset = 0; |
920 | rq->special_vec.bv_len = data_len; | |
921 | rq->rq_flags |= RQF_SPECIAL_PAYLOAD; | |
c98a0eb0 | 922 | |
81d926e8 CH |
923 | cmd->cmd_len = 16; |
924 | cmd->cmnd[0] = WRITE_SAME_16; | |
02d26103 | 925 | if (unmap) |
6a7b4398 | 926 | cmd->cmnd[1] = 0x8; /* UNMAP */ |
c6c93fdd MP |
927 | put_unaligned_be64(lba, &cmd->cmnd[2]); |
928 | put_unaligned_be32(nr_blocks, &cmd->cmnd[10]); | |
66ac0280 | 929 | |
0610959f | 930 | cmd->allowed = sdkp->max_retries; |
81d926e8 | 931 | cmd->transfersize = data_len; |
02d26103 | 932 | rq->timeout = unmap ? SD_TIMEOUT : SD_WRITE_SAME_TIMEOUT; |
c98a0eb0 | 933 | |
7007e9dd | 934 | return scsi_alloc_sgtables(cmd); |
81d926e8 | 935 | } |
c98a0eb0 | 936 | |
159b2cbf CH |
937 | static blk_status_t sd_setup_write_same10_cmnd(struct scsi_cmnd *cmd, |
938 | bool unmap) | |
81d926e8 CH |
939 | { |
940 | struct scsi_device *sdp = cmd->device; | |
5999ccff | 941 | struct request *rq = scsi_cmd_to_rq(cmd); |
f3fa33ac | 942 | struct scsi_disk *sdkp = scsi_disk(rq->q->disk); |
c6c93fdd MP |
943 | u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq)); |
944 | u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq)); | |
81d926e8 | 945 | u32 data_len = sdp->sector_size; |
c98a0eb0 | 946 | |
61cce6f6 | 947 | rq->special_vec.bv_page = mempool_alloc(sd_page_pool, GFP_ATOMIC); |
81d926e8 | 948 | if (!rq->special_vec.bv_page) |
159b2cbf | 949 | return BLK_STS_RESOURCE; |
61cce6f6 | 950 | clear_highpage(rq->special_vec.bv_page); |
81d926e8 CH |
951 | rq->special_vec.bv_offset = 0; |
952 | rq->special_vec.bv_len = data_len; | |
f9d03f96 | 953 | rq->rq_flags |= RQF_SPECIAL_PAYLOAD; |
e339c1a7 | 954 | |
81d926e8 CH |
955 | cmd->cmd_len = 10; |
956 | cmd->cmnd[0] = WRITE_SAME; | |
957 | if (unmap) | |
958 | cmd->cmnd[1] = 0x8; /* UNMAP */ | |
c6c93fdd MP |
959 | put_unaligned_be32(lba, &cmd->cmnd[2]); |
960 | put_unaligned_be16(nr_blocks, &cmd->cmnd[7]); | |
6a7b4398 | 961 | |
0610959f | 962 | cmd->allowed = sdkp->max_retries; |
81d926e8 | 963 | cmd->transfersize = data_len; |
02d26103 | 964 | rq->timeout = unmap ? SD_TIMEOUT : SD_WRITE_SAME_TIMEOUT; |
6a7b4398 | 965 | |
7007e9dd | 966 | return scsi_alloc_sgtables(cmd); |
f1126e95 | 967 | } |
f9d03f96 | 968 | |
159b2cbf | 969 | static blk_status_t sd_setup_write_zeroes_cmnd(struct scsi_cmnd *cmd) |
02d26103 | 970 | { |
5999ccff | 971 | struct request *rq = scsi_cmd_to_rq(cmd); |
02d26103 | 972 | struct scsi_device *sdp = cmd->device; |
f3fa33ac | 973 | struct scsi_disk *sdkp = scsi_disk(rq->q->disk); |
c6c93fdd MP |
974 | u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq)); |
975 | u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq)); | |
02d26103 | 976 | |
e4b87837 | 977 | if (!(rq->cmd_flags & REQ_NOUNMAP)) { |
e6bd9312 MP |
978 | switch (sdkp->zeroing_mode) { |
979 | case SD_ZERO_WS16_UNMAP: | |
39051dd8 | 980 | return sd_setup_write_same16_cmnd(cmd, true); |
e6bd9312 | 981 | case SD_ZERO_WS10_UNMAP: |
39051dd8 | 982 | return sd_setup_write_same10_cmnd(cmd, true); |
e4b87837 CH |
983 | } |
984 | } | |
c98a0eb0 | 985 | |
e5cc9002 EM |
986 | if (sdp->no_write_same) { |
987 | rq->rq_flags |= RQF_QUIET; | |
159b2cbf | 988 | return BLK_STS_TARGET; |
e5cc9002 | 989 | } |
ed44fd7f | 990 | |
c6c93fdd | 991 | if (sdkp->ws16 || lba > 0xffffffff || nr_blocks > 0xffff) |
39051dd8 | 992 | return sd_setup_write_same16_cmnd(cmd, false); |
ed44fd7f | 993 | |
39051dd8 | 994 | return sd_setup_write_same10_cmnd(cmd, false); |
f1126e95 FT |
995 | } |
996 | ||
5db44863 MP |
997 | static void sd_config_write_same(struct scsi_disk *sdkp) |
998 | { | |
999 | struct request_queue *q = sdkp->disk->queue; | |
1000 | unsigned int logical_block_size = sdkp->device->sector_size; | |
5db44863 MP |
1001 | |
1002 | if (sdkp->device->no_write_same) { | |
1003 | sdkp->max_ws_blocks = 0; | |
1004 | goto out; | |
1005 | } | |
1006 | ||
1007 | /* Some devices can not handle block counts above 0xffff despite | |
1008 | * supporting WRITE SAME(16). Consequently we default to 64k | |
1009 | * blocks per I/O unless the device explicitly advertises a | |
1010 | * bigger limit. | |
1011 | */ | |
66c28f97 MP |
1012 | if (sdkp->max_ws_blocks > SD_MAX_WS10_BLOCKS) |
1013 | sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks, | |
1014 | (u32)SD_MAX_WS16_BLOCKS); | |
1015 | else if (sdkp->ws16 || sdkp->ws10 || sdkp->device->no_report_opcodes) | |
1016 | sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks, | |
1017 | (u32)SD_MAX_WS10_BLOCKS); | |
1018 | else { | |
1019 | sdkp->device->no_write_same = 1; | |
1020 | sdkp->max_ws_blocks = 0; | |
1021 | } | |
5db44863 | 1022 | |
e6bd9312 MP |
1023 | if (sdkp->lbprz && sdkp->lbpws) |
1024 | sdkp->zeroing_mode = SD_ZERO_WS16_UNMAP; | |
1025 | else if (sdkp->lbprz && sdkp->lbpws10) | |
1026 | sdkp->zeroing_mode = SD_ZERO_WS10_UNMAP; | |
1027 | else if (sdkp->max_ws_blocks) | |
1028 | sdkp->zeroing_mode = SD_ZERO_WS; | |
1029 | else | |
1030 | sdkp->zeroing_mode = SD_ZERO_WRITE; | |
1031 | ||
b7af62a9 DLM |
1032 | if (sdkp->max_ws_blocks && |
1033 | sdkp->physical_block_size > logical_block_size) { | |
1034 | /* | |
1035 | * Reporting a maximum number of blocks that is not aligned | |
1036 | * on the device physical size would cause a large write same | |
1037 | * request to be split into physically unaligned chunks by | |
1038 | * __blkdev_issue_write_zeroes() and __blkdev_issue_write_same() | |
1039 | * even if the caller of these functions took care to align the | |
1040 | * large request. So make sure the maximum reported is aligned | |
1041 | * to the device physical block size. This is only an optional | |
1042 | * optimization for regular disks, but this is mandatory to | |
1043 | * avoid failure of large write same requests directed at | |
1044 | * sequential write required zones of host-managed ZBC disks. | |
1045 | */ | |
1046 | sdkp->max_ws_blocks = | |
1047 | round_down(sdkp->max_ws_blocks, | |
1048 | bytes_to_logical(sdkp->device, | |
1049 | sdkp->physical_block_size)); | |
1050 | } | |
1051 | ||
5db44863 | 1052 | out: |
66c28f97 MP |
1053 | blk_queue_max_write_same_sectors(q, sdkp->max_ws_blocks * |
1054 | (logical_block_size >> 9)); | |
02d26103 CH |
1055 | blk_queue_max_write_zeroes_sectors(q, sdkp->max_ws_blocks * |
1056 | (logical_block_size >> 9)); | |
5db44863 MP |
1057 | } |
1058 | ||
1059 | /** | |
1060 | * sd_setup_write_same_cmnd - write the same data to multiple blocks | |
59b1134c | 1061 | * @cmd: command to prepare |
5db44863 | 1062 | * |
7529fbb0 DLM |
1063 | * Will set up either WRITE SAME(10) or WRITE SAME(16) depending on |
1064 | * the preference indicated by the target device. | |
5db44863 | 1065 | **/ |
159b2cbf | 1066 | static blk_status_t sd_setup_write_same_cmnd(struct scsi_cmnd *cmd) |
5db44863 | 1067 | { |
5999ccff | 1068 | struct request *rq = scsi_cmd_to_rq(cmd); |
59b1134c | 1069 | struct scsi_device *sdp = cmd->device; |
f3fa33ac | 1070 | struct scsi_disk *sdkp = scsi_disk(rq->q->disk); |
5db44863 | 1071 | struct bio *bio = rq->bio; |
c6c93fdd MP |
1072 | u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq)); |
1073 | u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq)); | |
159b2cbf | 1074 | blk_status_t ret; |
5db44863 MP |
1075 | |
1076 | if (sdkp->device->no_write_same) | |
159b2cbf | 1077 | return BLK_STS_TARGET; |
5db44863 | 1078 | |
a4ad39b1 | 1079 | BUG_ON(bio_offset(bio) || bio_iovec(bio).bv_len != sdp->sector_size); |
5db44863 | 1080 | |
5db44863 | 1081 | rq->timeout = SD_WRITE_SAME_TIMEOUT; |
5db44863 | 1082 | |
c6c93fdd | 1083 | if (sdkp->ws16 || lba > 0xffffffff || nr_blocks > 0xffff) { |
59b1134c CH |
1084 | cmd->cmd_len = 16; |
1085 | cmd->cmnd[0] = WRITE_SAME_16; | |
c6c93fdd MP |
1086 | put_unaligned_be64(lba, &cmd->cmnd[2]); |
1087 | put_unaligned_be32(nr_blocks, &cmd->cmnd[10]); | |
5db44863 | 1088 | } else { |
59b1134c CH |
1089 | cmd->cmd_len = 10; |
1090 | cmd->cmnd[0] = WRITE_SAME; | |
c6c93fdd MP |
1091 | put_unaligned_be32(lba, &cmd->cmnd[2]); |
1092 | put_unaligned_be16(nr_blocks, &cmd->cmnd[7]); | |
5db44863 MP |
1093 | } |
1094 | ||
59b1134c | 1095 | cmd->transfersize = sdp->sector_size; |
0610959f | 1096 | cmd->allowed = sdkp->max_retries; |
08965c2e BVA |
1097 | |
1098 | /* | |
1099 | * For WRITE SAME the data transferred via the DATA OUT buffer is | |
1100 | * different from the amount of data actually written to the target. | |
1101 | * | |
1102 | * We set up __data_len to the amount of data transferred via the | |
1103 | * DATA OUT buffer so that blk_rq_map_sg sets up the proper S/G list | |
1104 | * to transfer a single sector of data first, but then reset it to | |
1105 | * the amount of data to be written right after so that the I/O path | |
1106 | * knows how much to actually write. | |
1107 | */ | |
1108 | rq->__data_len = sdp->sector_size; | |
7007e9dd | 1109 | ret = scsi_alloc_sgtables(cmd); |
84f7a9de | 1110 | rq->__data_len = blk_rq_bytes(rq); |
29f6ca69 | 1111 | |
08965c2e | 1112 | return ret; |
5db44863 MP |
1113 | } |
1114 | ||
159b2cbf | 1115 | static blk_status_t sd_setup_flush_cmnd(struct scsi_cmnd *cmd) |
90467c29 | 1116 | { |
5999ccff | 1117 | struct request *rq = scsi_cmd_to_rq(cmd); |
f3fa33ac | 1118 | struct scsi_disk *sdkp = scsi_disk(rq->q->disk); |
a118c6c1 CH |
1119 | |
1120 | /* flush requests don't perform I/O, zero the S/G table */ | |
1121 | memset(&cmd->sdb, 0, sizeof(cmd->sdb)); | |
90467c29 | 1122 | |
a118c6c1 CH |
1123 | cmd->cmnd[0] = SYNCHRONIZE_CACHE; |
1124 | cmd->cmd_len = 10; | |
1125 | cmd->transfersize = 0; | |
0610959f | 1126 | cmd->allowed = sdkp->max_retries; |
a118c6c1 | 1127 | |
26b9fd8b | 1128 | rq->timeout = rq->q->rq_timeout * SD_FLUSH_TIMEOUT_MULTIPLIER; |
159b2cbf | 1129 | return BLK_STS_OK; |
90467c29 FT |
1130 | } |
1131 | ||
78a02f49 MP |
1132 | static blk_status_t sd_setup_rw32_cmnd(struct scsi_cmnd *cmd, bool write, |
1133 | sector_t lba, unsigned int nr_blocks, | |
1134 | unsigned char flags) | |
1da177e4 | 1135 | { |
78a02f49 MP |
1136 | cmd->cmnd = mempool_alloc(sd_cdb_pool, GFP_ATOMIC); |
1137 | if (unlikely(cmd->cmnd == NULL)) | |
1138 | return BLK_STS_RESOURCE; | |
1139 | ||
1140 | cmd->cmd_len = SD_EXT_CDB_SIZE; | |
1141 | memset(cmd->cmnd, 0, cmd->cmd_len); | |
1142 | ||
1143 | cmd->cmnd[0] = VARIABLE_LENGTH_CMD; | |
1144 | cmd->cmnd[7] = 0x18; /* Additional CDB len */ | |
1145 | cmd->cmnd[9] = write ? WRITE_32 : READ_32; | |
1146 | cmd->cmnd[10] = flags; | |
1147 | put_unaligned_be64(lba, &cmd->cmnd[12]); | |
1148 | put_unaligned_be32(lba, &cmd->cmnd[20]); /* Expected Indirect LBA */ | |
1149 | put_unaligned_be32(nr_blocks, &cmd->cmnd[28]); | |
1150 | ||
1151 | return BLK_STS_OK; | |
1152 | } | |
1153 | ||
1154 | static blk_status_t sd_setup_rw16_cmnd(struct scsi_cmnd *cmd, bool write, | |
1155 | sector_t lba, unsigned int nr_blocks, | |
1156 | unsigned char flags) | |
1157 | { | |
1158 | cmd->cmd_len = 16; | |
1159 | cmd->cmnd[0] = write ? WRITE_16 : READ_16; | |
1160 | cmd->cmnd[1] = flags; | |
1161 | cmd->cmnd[14] = 0; | |
1162 | cmd->cmnd[15] = 0; | |
1163 | put_unaligned_be64(lba, &cmd->cmnd[2]); | |
1164 | put_unaligned_be32(nr_blocks, &cmd->cmnd[10]); | |
1165 | ||
1166 | return BLK_STS_OK; | |
1167 | } | |
1168 | ||
1169 | static blk_status_t sd_setup_rw10_cmnd(struct scsi_cmnd *cmd, bool write, | |
1170 | sector_t lba, unsigned int nr_blocks, | |
1171 | unsigned char flags) | |
1172 | { | |
1173 | cmd->cmd_len = 10; | |
1174 | cmd->cmnd[0] = write ? WRITE_10 : READ_10; | |
1175 | cmd->cmnd[1] = flags; | |
1176 | cmd->cmnd[6] = 0; | |
1177 | cmd->cmnd[9] = 0; | |
1178 | put_unaligned_be32(lba, &cmd->cmnd[2]); | |
1179 | put_unaligned_be16(nr_blocks, &cmd->cmnd[7]); | |
1180 | ||
1181 | return BLK_STS_OK; | |
1182 | } | |
1183 | ||
1184 | static blk_status_t sd_setup_rw6_cmnd(struct scsi_cmnd *cmd, bool write, | |
1185 | sector_t lba, unsigned int nr_blocks, | |
1186 | unsigned char flags) | |
1187 | { | |
db5db4b9 BVA |
1188 | /* Avoid that 0 blocks gets translated into 256 blocks. */ |
1189 | if (WARN_ON_ONCE(nr_blocks == 0)) | |
1190 | return BLK_STS_IOERR; | |
1191 | ||
78a02f49 MP |
1192 | if (unlikely(flags & 0x8)) { |
1193 | /* | |
1194 | * This happens only if this drive failed 10byte rw | |
1195 | * command with ILLEGAL_REQUEST during operation and | |
1196 | * thus turned off use_10_for_rw. | |
1197 | */ | |
1198 | scmd_printk(KERN_ERR, cmd, "FUA write on READ/WRITE(6) drive\n"); | |
1199 | return BLK_STS_IOERR; | |
1200 | } | |
1201 | ||
1202 | cmd->cmd_len = 6; | |
1203 | cmd->cmnd[0] = write ? WRITE_6 : READ_6; | |
1204 | cmd->cmnd[1] = (lba >> 16) & 0x1f; | |
1205 | cmd->cmnd[2] = (lba >> 8) & 0xff; | |
1206 | cmd->cmnd[3] = lba & 0xff; | |
1207 | cmd->cmnd[4] = nr_blocks; | |
1208 | cmd->cmnd[5] = 0; | |
1209 | ||
1210 | return BLK_STS_OK; | |
1211 | } | |
1212 | ||
cf64e5a5 | 1213 | static blk_status_t sd_setup_read_write_cmnd(struct scsi_cmnd *cmd) |
1da177e4 | 1214 | { |
5999ccff | 1215 | struct request *rq = scsi_cmd_to_rq(cmd); |
cf64e5a5 | 1216 | struct scsi_device *sdp = cmd->device; |
f3fa33ac | 1217 | struct scsi_disk *sdkp = scsi_disk(rq->q->disk); |
ec029758 | 1218 | sector_t lba = sectors_to_logical(sdp, blk_rq_pos(rq)); |
18351070 | 1219 | sector_t threshold; |
ec029758 | 1220 | unsigned int nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq)); |
ec029758 | 1221 | unsigned int mask = logical_to_sectors(sdp, 1) - 1; |
78a02f49 MP |
1222 | bool write = rq_data_dir(rq) == WRITE; |
1223 | unsigned char protect, fua; | |
159b2cbf | 1224 | blk_status_t ret; |
0cf9f4e5 XC |
1225 | unsigned int dif; |
1226 | bool dix; | |
7f9a6bc4 | 1227 | |
7007e9dd | 1228 | ret = scsi_alloc_sgtables(cmd); |
159b2cbf | 1229 | if (ret != BLK_STS_OK) |
39051dd8 | 1230 | return ret; |
7f9a6bc4 | 1231 | |
7007e9dd | 1232 | ret = BLK_STS_IOERR; |
e249e42d | 1233 | if (!scsi_device_online(sdp) || sdp->changed) { |
cf64e5a5 | 1234 | scmd_printk(KERN_ERR, cmd, "device offline or changed\n"); |
7007e9dd | 1235 | goto fail; |
1da177e4 LT |
1236 | } |
1237 | ||
f3fa33ac | 1238 | if (blk_rq_pos(rq) + blk_rq_sectors(rq) > get_capacity(rq->q->disk)) { |
cf64e5a5 | 1239 | scmd_printk(KERN_ERR, cmd, "access beyond end of device\n"); |
7007e9dd | 1240 | goto fail; |
e249e42d MP |
1241 | } |
1242 | ||
1243 | if ((blk_rq_pos(rq) & mask) || (blk_rq_sectors(rq) & mask)) { | |
cf64e5a5 | 1244 | scmd_printk(KERN_ERR, cmd, "request not aligned to the logical block size\n"); |
7007e9dd | 1245 | goto fail; |
1da177e4 | 1246 | } |
7f9a6bc4 | 1247 | |
a0899d4d | 1248 | /* |
ec029758 MP |
1249 | * Some SD card readers can't handle accesses which touch the |
1250 | * last one or two logical blocks. Split accesses as needed. | |
a0899d4d | 1251 | */ |
ec029758 | 1252 | threshold = sdkp->capacity - SD_LAST_BUGGY_SECTORS; |
18351070 | 1253 | |
c6c93fdd MP |
1254 | if (unlikely(sdp->last_sector_bug && lba + nr_blocks > threshold)) { |
1255 | if (lba < threshold) { | |
18351070 | 1256 | /* Access up to the threshold but not beyond */ |
c6c93fdd | 1257 | nr_blocks = threshold - lba; |
18351070 | 1258 | } else { |
ec029758 MP |
1259 | /* Access only a single logical block */ |
1260 | nr_blocks = 1; | |
18351070 LT |
1261 | } |
1262 | } | |
a0899d4d | 1263 | |
5795eb44 JT |
1264 | if (req_op(rq) == REQ_OP_ZONE_APPEND) { |
1265 | ret = sd_zbc_prepare_zone_append(cmd, &lba, nr_blocks); | |
1266 | if (ret) | |
7007e9dd | 1267 | goto fail; |
5795eb44 JT |
1268 | } |
1269 | ||
78a02f49 | 1270 | fua = rq->cmd_flags & REQ_FUA ? 0x8 : 0; |
cf64e5a5 BVA |
1271 | dix = scsi_prot_sg_count(cmd); |
1272 | dif = scsi_host_dif_capable(cmd->device->host, sdkp->protection_type); | |
1da177e4 | 1273 | |
c611529e | 1274 | if (dif || dix) |
cf64e5a5 | 1275 | protect = sd_setup_protect_cmnd(cmd, dix, dif); |
af55ff67 | 1276 | else |
4e7392ec MP |
1277 | protect = 0; |
1278 | ||
8475c811 | 1279 | if (protect && sdkp->protection_type == T10_PI_TYPE2_PROTECTION) { |
cf64e5a5 | 1280 | ret = sd_setup_rw32_cmnd(cmd, write, lba, nr_blocks, |
78a02f49 | 1281 | protect | fua); |
c6c93fdd | 1282 | } else if (sdp->use_16_for_rw || (nr_blocks > 0xffff)) { |
cf64e5a5 | 1283 | ret = sd_setup_rw16_cmnd(cmd, write, lba, nr_blocks, |
78a02f49 | 1284 | protect | fua); |
c6c93fdd | 1285 | } else if ((nr_blocks > 0xff) || (lba > 0x1fffff) || |
e249e42d | 1286 | sdp->use_10_for_rw || protect) { |
cf64e5a5 | 1287 | ret = sd_setup_rw10_cmnd(cmd, write, lba, nr_blocks, |
78a02f49 | 1288 | protect | fua); |
1da177e4 | 1289 | } else { |
cf64e5a5 | 1290 | ret = sd_setup_rw6_cmnd(cmd, write, lba, nr_blocks, |
78a02f49 | 1291 | protect | fua); |
1da177e4 | 1292 | } |
78a02f49 MP |
1293 | |
1294 | if (unlikely(ret != BLK_STS_OK)) | |
7007e9dd | 1295 | goto fail; |
1da177e4 LT |
1296 | |
1297 | /* | |
1298 | * We shouldn't disconnect in the middle of a sector, so with a dumb | |
1299 | * host adapter, it's safe to assume that we can at least transfer | |
1300 | * this many bytes between each connect / disconnect. | |
1301 | */ | |
cf64e5a5 BVA |
1302 | cmd->transfersize = sdp->sector_size; |
1303 | cmd->underflow = nr_blocks << 9; | |
0610959f | 1304 | cmd->allowed = sdkp->max_retries; |
cf64e5a5 | 1305 | cmd->sdb.length = nr_blocks * sdp->sector_size; |
e249e42d MP |
1306 | |
1307 | SCSI_LOG_HLQUEUE(1, | |
cf64e5a5 | 1308 | scmd_printk(KERN_INFO, cmd, |
e249e42d MP |
1309 | "%s: block=%llu, count=%d\n", __func__, |
1310 | (unsigned long long)blk_rq_pos(rq), | |
1311 | blk_rq_sectors(rq))); | |
1312 | SCSI_LOG_HLQUEUE(2, | |
cf64e5a5 | 1313 | scmd_printk(KERN_INFO, cmd, |
e249e42d MP |
1314 | "%s %d/%u 512 byte blocks.\n", |
1315 | write ? "writing" : "reading", nr_blocks, | |
1316 | blk_rq_sectors(rq))); | |
1da177e4 | 1317 | |
1da177e4 | 1318 | /* |
7007e9dd | 1319 | * This indicates that the command is ready from our end to be queued. |
1da177e4 | 1320 | */ |
159b2cbf | 1321 | return BLK_STS_OK; |
7007e9dd CH |
1322 | fail: |
1323 | scsi_free_sgtables(cmd); | |
1324 | return ret; | |
1da177e4 LT |
1325 | } |
1326 | ||
159b2cbf | 1327 | static blk_status_t sd_init_command(struct scsi_cmnd *cmd) |
87949eee | 1328 | { |
5999ccff | 1329 | struct request *rq = scsi_cmd_to_rq(cmd); |
87949eee | 1330 | |
c2df40df MC |
1331 | switch (req_op(rq)) { |
1332 | case REQ_OP_DISCARD: | |
f3fa33ac | 1333 | switch (scsi_disk(rq->q->disk)->provisioning_mode) { |
81d926e8 CH |
1334 | case SD_LBP_UNMAP: |
1335 | return sd_setup_unmap_cmnd(cmd); | |
1336 | case SD_LBP_WS16: | |
02d26103 | 1337 | return sd_setup_write_same16_cmnd(cmd, true); |
81d926e8 CH |
1338 | case SD_LBP_WS10: |
1339 | return sd_setup_write_same10_cmnd(cmd, true); | |
1340 | case SD_LBP_ZERO: | |
1341 | return sd_setup_write_same10_cmnd(cmd, false); | |
1342 | default: | |
159b2cbf | 1343 | return BLK_STS_TARGET; |
81d926e8 | 1344 | } |
02d26103 CH |
1345 | case REQ_OP_WRITE_ZEROES: |
1346 | return sd_setup_write_zeroes_cmnd(cmd); | |
c2df40df | 1347 | case REQ_OP_WRITE_SAME: |
87949eee | 1348 | return sd_setup_write_same_cmnd(cmd); |
3a5e02ce | 1349 | case REQ_OP_FLUSH: |
87949eee | 1350 | return sd_setup_flush_cmnd(cmd); |
c2df40df MC |
1351 | case REQ_OP_READ: |
1352 | case REQ_OP_WRITE: | |
5795eb44 | 1353 | case REQ_OP_ZONE_APPEND: |
87949eee | 1354 | return sd_setup_read_write_cmnd(cmd); |
89d94756 | 1355 | case REQ_OP_ZONE_RESET: |
ad512f20 AJ |
1356 | return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_RESET_WRITE_POINTER, |
1357 | false); | |
d81e9d49 | 1358 | case REQ_OP_ZONE_RESET_ALL: |
ad512f20 AJ |
1359 | return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_RESET_WRITE_POINTER, |
1360 | true); | |
1361 | case REQ_OP_ZONE_OPEN: | |
1362 | return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_OPEN_ZONE, false); | |
1363 | case REQ_OP_ZONE_CLOSE: | |
1364 | return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_CLOSE_ZONE, false); | |
1365 | case REQ_OP_ZONE_FINISH: | |
1366 | return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_FINISH_ZONE, false); | |
c2df40df | 1367 | default: |
f1f1fada | 1368 | WARN_ON_ONCE(1); |
159b2cbf | 1369 | return BLK_STS_NOTSUPP; |
c2df40df | 1370 | } |
87949eee CH |
1371 | } |
1372 | ||
1373 | static void sd_uninit_command(struct scsi_cmnd *SCpnt) | |
1374 | { | |
5999ccff | 1375 | struct request *rq = scsi_cmd_to_rq(SCpnt); |
14e3062f | 1376 | u8 *cmnd; |
87949eee | 1377 | |
f9d03f96 | 1378 | if (rq->rq_flags & RQF_SPECIAL_PAYLOAD) |
61cce6f6 | 1379 | mempool_free(rq->special_vec.bv_page, sd_page_pool); |
87949eee | 1380 | |
82ed4db4 | 1381 | if (SCpnt->cmnd != scsi_req(rq)->cmd) { |
14e3062f | 1382 | cmnd = SCpnt->cmnd; |
87949eee CH |
1383 | SCpnt->cmnd = NULL; |
1384 | SCpnt->cmd_len = 0; | |
14e3062f | 1385 | mempool_free(cmnd, sd_cdb_pool); |
87949eee CH |
1386 | } |
1387 | } | |
1388 | ||
d1b7f920 CH |
1389 | static bool sd_need_revalidate(struct block_device *bdev, |
1390 | struct scsi_disk *sdkp) | |
1391 | { | |
1392 | if (sdkp->device->removable || sdkp->write_prot) { | |
1393 | if (bdev_check_media_change(bdev)) | |
1394 | return true; | |
1395 | } | |
1396 | ||
1397 | /* | |
1398 | * Force a full rescan after ioctl(BLKRRPART). While the disk state has | |
1399 | * nothing to do with partitions, BLKRRPART is used to force a full | |
1400 | * revalidate after things like a format for historical reasons. | |
1401 | */ | |
1402 | return test_bit(GD_NEED_PART_SCAN, &bdev->bd_disk->state); | |
1403 | } | |
1404 | ||
1da177e4 LT |
1405 | /** |
1406 | * sd_open - open a scsi disk device | |
7529fbb0 DLM |
1407 | * @bdev: Block device of the scsi disk to open |
1408 | * @mode: FMODE_* mask | |
1da177e4 LT |
1409 | * |
1410 | * Returns 0 if successful. Returns a negated errno value in case | |
1411 | * of error. | |
1412 | * | |
1413 | * Note: This can be called from a user context (e.g. fsck(1) ) | |
1414 | * or from within the kernel (e.g. as a result of a mount(1) ). | |
1415 | * In the latter case @inode and @filp carry an abridged amount | |
1416 | * of information as noted above. | |
409f3499 | 1417 | * |
a8698707 | 1418 | * Locking: called with bdev->bd_disk->open_mutex held. |
1da177e4 | 1419 | **/ |
0338e291 | 1420 | static int sd_open(struct block_device *bdev, fmode_t mode) |
1da177e4 | 1421 | { |
0338e291 | 1422 | struct scsi_disk *sdkp = scsi_disk_get(bdev->bd_disk); |
1da177e4 LT |
1423 | struct scsi_device *sdev; |
1424 | int retval; | |
1425 | ||
0338e291 | 1426 | if (!sdkp) |
1da177e4 LT |
1427 | return -ENXIO; |
1428 | ||
fa0d34be | 1429 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_open\n")); |
1da177e4 LT |
1430 | |
1431 | sdev = sdkp->device; | |
1432 | ||
1433 | /* | |
1434 | * If the device is in error recovery, wait until it is done. | |
1435 | * If the device is offline, then disallow any access to it. | |
1436 | */ | |
1437 | retval = -ENXIO; | |
1438 | if (!scsi_block_when_processing_errors(sdev)) | |
1439 | goto error_out; | |
1440 | ||
d1b7f920 CH |
1441 | if (sd_need_revalidate(bdev, sdkp)) |
1442 | sd_revalidate_disk(bdev->bd_disk); | |
1da177e4 LT |
1443 | |
1444 | /* | |
1445 | * If the drive is empty, just let the open fail. | |
1446 | */ | |
1447 | retval = -ENOMEDIUM; | |
0338e291 | 1448 | if (sdev->removable && !sdkp->media_present && !(mode & FMODE_NDELAY)) |
1da177e4 LT |
1449 | goto error_out; |
1450 | ||
1451 | /* | |
1452 | * If the device has the write protect tab set, have the open fail | |
1453 | * if the user expects to be able to write to the thing. | |
1454 | */ | |
1455 | retval = -EROFS; | |
0338e291 | 1456 | if (sdkp->write_prot && (mode & FMODE_WRITE)) |
1da177e4 LT |
1457 | goto error_out; |
1458 | ||
1459 | /* | |
1460 | * It is possible that the disk changing stuff resulted in | |
1461 | * the device being taken offline. If this is the case, | |
1462 | * report this to the user, and don't pretend that the | |
1463 | * open actually succeeded. | |
1464 | */ | |
1465 | retval = -ENXIO; | |
1466 | if (!scsi_device_online(sdev)) | |
1467 | goto error_out; | |
1468 | ||
409f3499 | 1469 | if ((atomic_inc_return(&sdkp->openers) == 1) && sdev->removable) { |
1da177e4 LT |
1470 | if (scsi_block_when_processing_errors(sdev)) |
1471 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT); | |
1472 | } | |
1473 | ||
1474 | return 0; | |
1475 | ||
1476 | error_out: | |
1477 | scsi_disk_put(sdkp); | |
1478 | return retval; | |
1479 | } | |
1480 | ||
1481 | /** | |
1482 | * sd_release - invoked when the (last) close(2) is called on this | |
1483 | * scsi disk. | |
7529fbb0 DLM |
1484 | * @disk: disk to release |
1485 | * @mode: FMODE_* mask | |
1da177e4 LT |
1486 | * |
1487 | * Returns 0. | |
1488 | * | |
1489 | * Note: may block (uninterruptible) if error recovery is underway | |
1490 | * on this disk. | |
409f3499 | 1491 | * |
a8698707 | 1492 | * Locking: called with bdev->bd_disk->open_mutex held. |
1da177e4 | 1493 | **/ |
db2a144b | 1494 | static void sd_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 1495 | { |
1da177e4 LT |
1496 | struct scsi_disk *sdkp = scsi_disk(disk); |
1497 | struct scsi_device *sdev = sdkp->device; | |
1498 | ||
56937f7b | 1499 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_release\n")); |
1da177e4 | 1500 | |
7e443312 | 1501 | if (atomic_dec_return(&sdkp->openers) == 0 && sdev->removable) { |
1da177e4 LT |
1502 | if (scsi_block_when_processing_errors(sdev)) |
1503 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW); | |
1504 | } | |
1505 | ||
1da177e4 | 1506 | scsi_disk_put(sdkp); |
1da177e4 LT |
1507 | } |
1508 | ||
a885c8c4 | 1509 | static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
1da177e4 LT |
1510 | { |
1511 | struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk); | |
1512 | struct scsi_device *sdp = sdkp->device; | |
1513 | struct Scsi_Host *host = sdp->host; | |
f08bb1e0 | 1514 | sector_t capacity = logical_to_sectors(sdp, sdkp->capacity); |
1da177e4 LT |
1515 | int diskinfo[4]; |
1516 | ||
1517 | /* default to most commonly used values */ | |
f08bb1e0 MP |
1518 | diskinfo[0] = 0x40; /* 1 << 6 */ |
1519 | diskinfo[1] = 0x20; /* 1 << 5 */ | |
1520 | diskinfo[2] = capacity >> 11; | |
1521 | ||
1da177e4 LT |
1522 | /* override with calculated, extended default, or driver values */ |
1523 | if (host->hostt->bios_param) | |
f08bb1e0 | 1524 | host->hostt->bios_param(sdp, bdev, capacity, diskinfo); |
1da177e4 | 1525 | else |
f08bb1e0 | 1526 | scsicam_bios_param(bdev, capacity, diskinfo); |
1da177e4 | 1527 | |
a885c8c4 CH |
1528 | geo->heads = diskinfo[0]; |
1529 | geo->sectors = diskinfo[1]; | |
1530 | geo->cylinders = diskinfo[2]; | |
1da177e4 LT |
1531 | return 0; |
1532 | } | |
1533 | ||
1534 | /** | |
44328310 | 1535 | * sd_ioctl - process an ioctl |
7529fbb0 DLM |
1536 | * @bdev: target block device |
1537 | * @mode: FMODE_* mask | |
1da177e4 | 1538 | * @cmd: ioctl command number |
44328310 | 1539 | * @arg: this is third argument given to ioctl(2) system call. |
1da177e4 LT |
1540 | * Often contains a pointer. |
1541 | * | |
25985edc | 1542 | * Returns 0 if successful (some ioctls return positive numbers on |
1da177e4 LT |
1543 | * success as well). Returns a negated errno value in case of error. |
1544 | * | |
1545 | * Note: most ioctls are forward onto the block subsystem or further | |
3a4fa0a2 | 1546 | * down in the scsi subsystem. |
1da177e4 | 1547 | **/ |
44328310 CH |
1548 | static int sd_ioctl(struct block_device *bdev, fmode_t mode, |
1549 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1550 | { |
1da177e4 | 1551 | struct gendisk *disk = bdev->bd_disk; |
fe2d1851 NN |
1552 | struct scsi_disk *sdkp = scsi_disk(disk); |
1553 | struct scsi_device *sdp = sdkp->device; | |
44328310 | 1554 | void __user *p = (void __user *)arg; |
1da177e4 LT |
1555 | int error; |
1556 | ||
fe2d1851 NN |
1557 | SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO, sdkp, "sd_ioctl: disk=%s, " |
1558 | "cmd=0x%x\n", disk->disk_name, cmd)); | |
1da177e4 | 1559 | |
4f07bfc5 CH |
1560 | if (bdev_is_partition(bdev) && !capable(CAP_SYS_RAWIO)) |
1561 | return -ENOIOCTLCMD; | |
0bfc96cb | 1562 | |
1da177e4 LT |
1563 | /* |
1564 | * If we are in the middle of error recovery, don't let anyone | |
1565 | * else try and use this device. Also, if error recovery fails, it | |
1566 | * may try and take the device offline, in which case all further | |
1567 | * access to the device is prohibited. | |
1568 | */ | |
906d15fb CH |
1569 | error = scsi_ioctl_block_when_processing_errors(sdp, cmd, |
1570 | (mode & FMODE_NDELAY) != 0); | |
1571 | if (error) | |
44328310 | 1572 | return error; |
1da177e4 | 1573 | |
d80210f2 CH |
1574 | if (is_sed_ioctl(cmd)) |
1575 | return sed_ioctl(sdkp->opal_dev, cmd, p); | |
a30e3441 | 1576 | return scsi_ioctl(sdp, mode, cmd, p); |
1da177e4 LT |
1577 | } |
1578 | ||
1579 | static void set_media_not_present(struct scsi_disk *sdkp) | |
1580 | { | |
2bae0093 TH |
1581 | if (sdkp->media_present) |
1582 | sdkp->device->changed = 1; | |
1583 | ||
1584 | if (sdkp->device->removable) { | |
1585 | sdkp->media_present = 0; | |
1586 | sdkp->capacity = 0; | |
1587 | } | |
1588 | } | |
1589 | ||
1590 | static int media_not_present(struct scsi_disk *sdkp, | |
1591 | struct scsi_sense_hdr *sshdr) | |
1592 | { | |
1593 | if (!scsi_sense_valid(sshdr)) | |
1594 | return 0; | |
1595 | ||
1596 | /* not invoked for commands that could return deferred errors */ | |
1597 | switch (sshdr->sense_key) { | |
1598 | case UNIT_ATTENTION: | |
1599 | case NOT_READY: | |
1600 | /* medium not present */ | |
1601 | if (sshdr->asc == 0x3A) { | |
1602 | set_media_not_present(sdkp); | |
1603 | return 1; | |
1604 | } | |
1605 | } | |
1606 | return 0; | |
1da177e4 LT |
1607 | } |
1608 | ||
1609 | /** | |
2bae0093 TH |
1610 | * sd_check_events - check media events |
1611 | * @disk: kernel device descriptor | |
1612 | * @clearing: disk events currently being cleared | |
1da177e4 | 1613 | * |
2bae0093 | 1614 | * Returns mask of DISK_EVENT_*. |
1da177e4 LT |
1615 | * |
1616 | * Note: this function is invoked from the block subsystem. | |
1617 | **/ | |
2bae0093 | 1618 | static unsigned int sd_check_events(struct gendisk *disk, unsigned int clearing) |
1da177e4 | 1619 | { |
eb72d0bb HR |
1620 | struct scsi_disk *sdkp = scsi_disk_get(disk); |
1621 | struct scsi_device *sdp; | |
1da177e4 | 1622 | int retval; |
41e70e30 | 1623 | bool disk_changed; |
1da177e4 | 1624 | |
eb72d0bb HR |
1625 | if (!sdkp) |
1626 | return 0; | |
1627 | ||
1628 | sdp = sdkp->device; | |
2bae0093 | 1629 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_check_events\n")); |
1da177e4 LT |
1630 | |
1631 | /* | |
1632 | * If the device is offline, don't send any commands - just pretend as | |
1633 | * if the command failed. If the device ever comes back online, we | |
1634 | * can deal with it then. It is only because of unrecoverable errors | |
1635 | * that we would ever take a device offline in the first place. | |
1636 | */ | |
285e9670 KS |
1637 | if (!scsi_device_online(sdp)) { |
1638 | set_media_not_present(sdkp); | |
285e9670 KS |
1639 | goto out; |
1640 | } | |
1da177e4 LT |
1641 | |
1642 | /* | |
1643 | * Using TEST_UNIT_READY enables differentiation between drive with | |
1644 | * no cartridge loaded - NOT READY, drive with changed cartridge - | |
1645 | * UNIT ATTENTION, or with same cartridge - GOOD STATUS. | |
1646 | * | |
1647 | * Drives that auto spin down. eg iomega jaz 1G, will be started | |
1648 | * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever | |
1649 | * sd_revalidate() is called. | |
1650 | */ | |
001aac25 | 1651 | if (scsi_block_when_processing_errors(sdp)) { |
6fa2b8f9 CH |
1652 | struct scsi_sense_hdr sshdr = { 0, }; |
1653 | ||
0610959f | 1654 | retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, sdkp->max_retries, |
6fa2b8f9 | 1655 | &sshdr); |
1da177e4 | 1656 | |
6fa2b8f9 | 1657 | /* failed to execute TUR, assume media not present */ |
ced202f7 | 1658 | if (retval < 0 || host_byte(retval)) { |
6fa2b8f9 CH |
1659 | set_media_not_present(sdkp); |
1660 | goto out; | |
1661 | } | |
1da177e4 | 1662 | |
6fa2b8f9 CH |
1663 | if (media_not_present(sdkp, &sshdr)) |
1664 | goto out; | |
1665 | } | |
2bae0093 | 1666 | |
1da177e4 LT |
1667 | /* |
1668 | * For removable scsi disk we have to recognise the presence | |
2bae0093 | 1669 | * of a disk in the drive. |
1da177e4 | 1670 | */ |
2bae0093 TH |
1671 | if (!sdkp->media_present) |
1672 | sdp->changed = 1; | |
1da177e4 | 1673 | sdkp->media_present = 1; |
285e9670 | 1674 | out: |
3ff5588d | 1675 | /* |
2bae0093 | 1676 | * sdp->changed is set under the following conditions: |
3ff5588d | 1677 | * |
2bae0093 TH |
1678 | * Medium present state has changed in either direction. |
1679 | * Device has indicated UNIT_ATTENTION. | |
3ff5588d | 1680 | */ |
41e70e30 | 1681 | disk_changed = sdp->changed; |
2bae0093 | 1682 | sdp->changed = 0; |
eb72d0bb | 1683 | scsi_disk_put(sdkp); |
41e70e30 | 1684 | return disk_changed ? DISK_EVENT_MEDIA_CHANGE : 0; |
1da177e4 LT |
1685 | } |
1686 | ||
4fa83244 | 1687 | static int sd_sync_cache(struct scsi_disk *sdkp, struct scsi_sense_hdr *sshdr) |
1da177e4 | 1688 | { |
1da177e4 | 1689 | int retries, res; |
e73aec82 | 1690 | struct scsi_device *sdp = sdkp->device; |
7e660100 JB |
1691 | const int timeout = sdp->request_queue->rq_timeout |
1692 | * SD_FLUSH_TIMEOUT_MULTIPLIER; | |
4fa83244 | 1693 | struct scsi_sense_hdr my_sshdr; |
1da177e4 LT |
1694 | |
1695 | if (!scsi_device_online(sdp)) | |
1696 | return -ENODEV; | |
1697 | ||
4fa83244 DB |
1698 | /* caller might not be interested in sense, but we need it */ |
1699 | if (!sshdr) | |
1700 | sshdr = &my_sshdr; | |
1701 | ||
1da177e4 LT |
1702 | for (retries = 3; retries > 0; --retries) { |
1703 | unsigned char cmd[10] = { 0 }; | |
1704 | ||
1705 | cmd[0] = SYNCHRONIZE_CACHE; | |
1706 | /* | |
1707 | * Leave the rest of the command zero to indicate | |
1708 | * flush everything. | |
1709 | */ | |
4fa83244 | 1710 | res = scsi_execute(sdp, cmd, DMA_NONE, NULL, 0, NULL, sshdr, |
0610959f | 1711 | timeout, sdkp->max_retries, 0, RQF_PM, NULL); |
ea73a9f2 | 1712 | if (res == 0) |
1da177e4 LT |
1713 | break; |
1714 | } | |
1715 | ||
e73aec82 | 1716 | if (res) { |
ef61329d | 1717 | sd_print_result(sdkp, "Synchronize Cache(10) failed", res); |
95897910 | 1718 | |
ced202f7 HR |
1719 | if (res < 0) |
1720 | return res; | |
1721 | ||
464a00c9 HR |
1722 | if (scsi_status_is_check_condition(res) && |
1723 | scsi_sense_valid(sshdr)) { | |
4fa83244 DB |
1724 | sd_print_sense_hdr(sdkp, sshdr); |
1725 | ||
464a00c9 HR |
1726 | /* we need to evaluate the error return */ |
1727 | if (sshdr->asc == 0x3a || /* medium not present */ | |
1728 | sshdr->asc == 0x20 || /* invalid command */ | |
1729 | (sshdr->asc == 0x74 && sshdr->ascq == 0x71)) /* drive is password locked */ | |
95897910 ON |
1730 | /* this is no error here */ |
1731 | return 0; | |
464a00c9 | 1732 | } |
95897910 ON |
1733 | |
1734 | switch (host_byte(res)) { | |
1735 | /* ignore errors due to racing a disconnection */ | |
1736 | case DID_BAD_TARGET: | |
1737 | case DID_NO_CONNECT: | |
1738 | return 0; | |
1739 | /* signal the upper layer it might try again */ | |
1740 | case DID_BUS_BUSY: | |
1741 | case DID_IMM_RETRY: | |
1742 | case DID_REQUEUE: | |
1743 | case DID_SOFT_ERROR: | |
1744 | return -EBUSY; | |
1745 | default: | |
1746 | return -EIO; | |
1747 | } | |
1da177e4 | 1748 | } |
3721050a | 1749 | return 0; |
1da177e4 LT |
1750 | } |
1751 | ||
1da177e4 LT |
1752 | static void sd_rescan(struct device *dev) |
1753 | { | |
3d9a1f53 | 1754 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
39b7f1e2 | 1755 | |
b200e38c | 1756 | sd_revalidate_disk(sdkp->disk); |
1da177e4 LT |
1757 | } |
1758 | ||
b83ce214 CH |
1759 | static int sd_get_unique_id(struct gendisk *disk, u8 id[16], |
1760 | enum blk_unique_id type) | |
1761 | { | |
1762 | struct scsi_device *sdev = scsi_disk(disk)->device; | |
1763 | const struct scsi_vpd *vpd; | |
1764 | const unsigned char *d; | |
1765 | int ret = -ENXIO, len; | |
1766 | ||
1767 | rcu_read_lock(); | |
1768 | vpd = rcu_dereference(sdev->vpd_pg83); | |
1769 | if (!vpd) | |
1770 | goto out_unlock; | |
1771 | ||
1772 | ret = -EINVAL; | |
1773 | for (d = vpd->data + 4; d < vpd->data + vpd->len; d += d[3] + 4) { | |
1774 | /* we only care about designators with LU association */ | |
1775 | if (((d[1] >> 4) & 0x3) != 0x00) | |
1776 | continue; | |
1777 | if ((d[1] & 0xf) != type) | |
1778 | continue; | |
1779 | ||
1780 | /* | |
1781 | * Only exit early if a 16-byte descriptor was found. Otherwise | |
1782 | * keep looking as one with more entropy might still show up. | |
1783 | */ | |
1784 | len = d[3]; | |
1785 | if (len != 8 && len != 12 && len != 16) | |
1786 | continue; | |
1787 | ret = len; | |
1788 | memcpy(id, d + 4, len); | |
1789 | if (len == 16) | |
1790 | break; | |
1791 | } | |
1792 | out_unlock: | |
1793 | rcu_read_unlock(); | |
1794 | return ret; | |
1795 | } | |
1796 | ||
924d55b0 CH |
1797 | static char sd_pr_type(enum pr_type type) |
1798 | { | |
1799 | switch (type) { | |
1800 | case PR_WRITE_EXCLUSIVE: | |
1801 | return 0x01; | |
1802 | case PR_EXCLUSIVE_ACCESS: | |
1803 | return 0x03; | |
1804 | case PR_WRITE_EXCLUSIVE_REG_ONLY: | |
1805 | return 0x05; | |
1806 | case PR_EXCLUSIVE_ACCESS_REG_ONLY: | |
1807 | return 0x06; | |
1808 | case PR_WRITE_EXCLUSIVE_ALL_REGS: | |
1809 | return 0x07; | |
1810 | case PR_EXCLUSIVE_ACCESS_ALL_REGS: | |
1811 | return 0x08; | |
1812 | default: | |
1813 | return 0; | |
1814 | } | |
1815 | }; | |
1816 | ||
1817 | static int sd_pr_command(struct block_device *bdev, u8 sa, | |
1818 | u64 key, u64 sa_key, u8 type, u8 flags) | |
1819 | { | |
0610959f MC |
1820 | struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk); |
1821 | struct scsi_device *sdev = sdkp->device; | |
924d55b0 CH |
1822 | struct scsi_sense_hdr sshdr; |
1823 | int result; | |
1824 | u8 cmd[16] = { 0, }; | |
1825 | u8 data[24] = { 0, }; | |
1826 | ||
1827 | cmd[0] = PERSISTENT_RESERVE_OUT; | |
1828 | cmd[1] = sa; | |
1829 | cmd[2] = type; | |
1830 | put_unaligned_be32(sizeof(data), &cmd[5]); | |
1831 | ||
1832 | put_unaligned_be64(key, &data[0]); | |
1833 | put_unaligned_be64(sa_key, &data[8]); | |
1834 | data[20] = flags; | |
1835 | ||
1836 | result = scsi_execute_req(sdev, cmd, DMA_TO_DEVICE, &data, sizeof(data), | |
0610959f | 1837 | &sshdr, SD_TIMEOUT, sdkp->max_retries, NULL); |
924d55b0 | 1838 | |
464a00c9 | 1839 | if (scsi_status_is_check_condition(result) && |
c65be1a6 | 1840 | scsi_sense_valid(&sshdr)) { |
924d55b0 CH |
1841 | sdev_printk(KERN_INFO, sdev, "PR command failed: %d\n", result); |
1842 | scsi_print_sense_hdr(sdev, NULL, &sshdr); | |
1843 | } | |
1844 | ||
1845 | return result; | |
1846 | } | |
1847 | ||
1848 | static int sd_pr_register(struct block_device *bdev, u64 old_key, u64 new_key, | |
1849 | u32 flags) | |
1850 | { | |
1851 | if (flags & ~PR_FL_IGNORE_KEY) | |
1852 | return -EOPNOTSUPP; | |
1853 | return sd_pr_command(bdev, (flags & PR_FL_IGNORE_KEY) ? 0x06 : 0x00, | |
1854 | old_key, new_key, 0, | |
01f90dd9 | 1855 | (1 << 0) /* APTPL */); |
924d55b0 CH |
1856 | } |
1857 | ||
1858 | static int sd_pr_reserve(struct block_device *bdev, u64 key, enum pr_type type, | |
1859 | u32 flags) | |
1860 | { | |
1861 | if (flags) | |
1862 | return -EOPNOTSUPP; | |
1863 | return sd_pr_command(bdev, 0x01, key, 0, sd_pr_type(type), 0); | |
1864 | } | |
1865 | ||
1866 | static int sd_pr_release(struct block_device *bdev, u64 key, enum pr_type type) | |
1867 | { | |
1868 | return sd_pr_command(bdev, 0x02, key, 0, sd_pr_type(type), 0); | |
1869 | } | |
1870 | ||
1871 | static int sd_pr_preempt(struct block_device *bdev, u64 old_key, u64 new_key, | |
1872 | enum pr_type type, bool abort) | |
1873 | { | |
1874 | return sd_pr_command(bdev, abort ? 0x05 : 0x04, old_key, new_key, | |
1875 | sd_pr_type(type), 0); | |
1876 | } | |
1877 | ||
1878 | static int sd_pr_clear(struct block_device *bdev, u64 key) | |
1879 | { | |
1880 | return sd_pr_command(bdev, 0x03, key, 0, 0, 0); | |
1881 | } | |
1882 | ||
1883 | static const struct pr_ops sd_pr_ops = { | |
1884 | .pr_register = sd_pr_register, | |
1885 | .pr_reserve = sd_pr_reserve, | |
1886 | .pr_release = sd_pr_release, | |
1887 | .pr_preempt = sd_pr_preempt, | |
1888 | .pr_clear = sd_pr_clear, | |
1889 | }; | |
1890 | ||
83d5cde4 | 1891 | static const struct block_device_operations sd_fops = { |
1da177e4 | 1892 | .owner = THIS_MODULE, |
0338e291 AV |
1893 | .open = sd_open, |
1894 | .release = sd_release, | |
8a6cfeb6 | 1895 | .ioctl = sd_ioctl, |
a885c8c4 | 1896 | .getgeo = sd_getgeo, |
44328310 | 1897 | .compat_ioctl = blkdev_compat_ptr_ioctl, |
2bae0093 | 1898 | .check_events = sd_check_events, |
72ec24bd | 1899 | .unlock_native_capacity = sd_unlock_native_capacity, |
e76239a3 | 1900 | .report_zones = sd_zbc_report_zones, |
b83ce214 | 1901 | .get_unique_id = sd_get_unique_id, |
924d55b0 | 1902 | .pr_ops = &sd_pr_ops, |
1da177e4 LT |
1903 | }; |
1904 | ||
7a38dc0b HR |
1905 | /** |
1906 | * sd_eh_reset - reset error handling callback | |
1907 | * @scmd: sd-issued command that has failed | |
1908 | * | |
1909 | * This function is called by the SCSI midlayer before starting | |
1910 | * SCSI EH. When counting medium access failures we have to be | |
1911 | * careful to register it only only once per device and SCSI EH run; | |
1912 | * there might be several timed out commands which will cause the | |
1913 | * 'max_medium_access_timeouts' counter to trigger after the first | |
1914 | * SCSI EH run already and set the device to offline. | |
1915 | * So this function resets the internal counter before starting SCSI EH. | |
1916 | **/ | |
1917 | static void sd_eh_reset(struct scsi_cmnd *scmd) | |
1918 | { | |
f3fa33ac | 1919 | struct scsi_disk *sdkp = scsi_disk(scsi_cmd_to_rq(scmd)->q->disk); |
7a38dc0b HR |
1920 | |
1921 | /* New SCSI EH run, reset gate variable */ | |
1922 | sdkp->ignore_medium_access_errors = false; | |
1923 | } | |
1924 | ||
18a4d0a2 MP |
1925 | /** |
1926 | * sd_eh_action - error handling callback | |
1927 | * @scmd: sd-issued command that has failed | |
18a4d0a2 MP |
1928 | * @eh_disp: The recovery disposition suggested by the midlayer |
1929 | * | |
2451079b JB |
1930 | * This function is called by the SCSI midlayer upon completion of an |
1931 | * error test command (currently TEST UNIT READY). The result of sending | |
1932 | * the eh command is passed in eh_disp. We're looking for devices that | |
1933 | * fail medium access commands but are OK with non access commands like | |
1934 | * test unit ready (so wrongly see the device as having a successful | |
1935 | * recovery) | |
18a4d0a2 | 1936 | **/ |
2451079b | 1937 | static int sd_eh_action(struct scsi_cmnd *scmd, int eh_disp) |
18a4d0a2 | 1938 | { |
f3fa33ac | 1939 | struct scsi_disk *sdkp = scsi_disk(scsi_cmd_to_rq(scmd)->q->disk); |
0db6ca8a | 1940 | struct scsi_device *sdev = scmd->device; |
18a4d0a2 | 1941 | |
0db6ca8a | 1942 | if (!scsi_device_online(sdev) || |
2451079b JB |
1943 | !scsi_medium_access_command(scmd) || |
1944 | host_byte(scmd->result) != DID_TIME_OUT || | |
1945 | eh_disp != SUCCESS) | |
18a4d0a2 MP |
1946 | return eh_disp; |
1947 | ||
1948 | /* | |
1949 | * The device has timed out executing a medium access command. | |
1950 | * However, the TEST UNIT READY command sent during error | |
1951 | * handling completed successfully. Either the device is in the | |
1952 | * process of recovering or has it suffered an internal failure | |
1953 | * that prevents access to the storage medium. | |
1954 | */ | |
7a38dc0b HR |
1955 | if (!sdkp->ignore_medium_access_errors) { |
1956 | sdkp->medium_access_timed_out++; | |
1957 | sdkp->ignore_medium_access_errors = true; | |
1958 | } | |
18a4d0a2 MP |
1959 | |
1960 | /* | |
1961 | * If the device keeps failing read/write commands but TEST UNIT | |
1962 | * READY always completes successfully we assume that medium | |
1963 | * access is no longer possible and take the device offline. | |
1964 | */ | |
1965 | if (sdkp->medium_access_timed_out >= sdkp->max_medium_access_timeouts) { | |
1966 | scmd_printk(KERN_ERR, scmd, | |
1967 | "Medium access timeout failure. Offlining disk!\n"); | |
0db6ca8a BVA |
1968 | mutex_lock(&sdev->state_mutex); |
1969 | scsi_device_set_state(sdev, SDEV_OFFLINE); | |
1970 | mutex_unlock(&sdev->state_mutex); | |
18a4d0a2 | 1971 | |
e8f8d50e | 1972 | return SUCCESS; |
18a4d0a2 MP |
1973 | } |
1974 | ||
1975 | return eh_disp; | |
1976 | } | |
1977 | ||
af55ff67 MP |
1978 | static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd) |
1979 | { | |
5999ccff | 1980 | struct request *req = scsi_cmd_to_rq(scmd); |
6eadc612 DLM |
1981 | struct scsi_device *sdev = scmd->device; |
1982 | unsigned int transferred, good_bytes; | |
1983 | u64 start_lba, end_lba, bad_lba; | |
1984 | ||
a8733c7b | 1985 | /* |
6eadc612 DLM |
1986 | * Some commands have a payload smaller than the device logical |
1987 | * block size (e.g. INQUIRY on a 4K disk). | |
a8733c7b | 1988 | */ |
6eadc612 | 1989 | if (scsi_bufflen(scmd) <= sdev->sector_size) |
af55ff67 MP |
1990 | return 0; |
1991 | ||
6eadc612 DLM |
1992 | /* Check if we have a 'bad_lba' information */ |
1993 | if (!scsi_get_sense_info_fld(scmd->sense_buffer, | |
1994 | SCSI_SENSE_BUFFERSIZE, | |
1995 | &bad_lba)) | |
af55ff67 MP |
1996 | return 0; |
1997 | ||
6eadc612 DLM |
1998 | /* |
1999 | * If the bad lba was reported incorrectly, we have no idea where | |
af55ff67 MP |
2000 | * the error is. |
2001 | */ | |
6eadc612 DLM |
2002 | start_lba = sectors_to_logical(sdev, blk_rq_pos(req)); |
2003 | end_lba = start_lba + bytes_to_logical(sdev, scsi_bufflen(scmd)); | |
2004 | if (bad_lba < start_lba || bad_lba >= end_lba) | |
af55ff67 MP |
2005 | return 0; |
2006 | ||
6eadc612 DLM |
2007 | /* |
2008 | * resid is optional but mostly filled in. When it's unused, | |
2009 | * its value is zero, so we assume the whole buffer transferred | |
af55ff67 | 2010 | */ |
6eadc612 DLM |
2011 | transferred = scsi_bufflen(scmd) - scsi_get_resid(scmd); |
2012 | ||
2013 | /* This computation should always be done in terms of the | |
2014 | * resolution of the device's medium. | |
af55ff67 | 2015 | */ |
6eadc612 DLM |
2016 | good_bytes = logical_to_bytes(sdev, bad_lba - start_lba); |
2017 | ||
a8733c7b | 2018 | return min(good_bytes, transferred); |
af55ff67 MP |
2019 | } |
2020 | ||
1da177e4 | 2021 | /** |
7b3d9545 | 2022 | * sd_done - bottom half handler: called when the lower level |
1da177e4 LT |
2023 | * driver has completed (successfully or otherwise) a scsi command. |
2024 | * @SCpnt: mid-level's per command structure. | |
2025 | * | |
2026 | * Note: potentially run from within an ISR. Must not block. | |
2027 | **/ | |
7b3d9545 | 2028 | static int sd_done(struct scsi_cmnd *SCpnt) |
1da177e4 LT |
2029 | { |
2030 | int result = SCpnt->result; | |
af55ff67 | 2031 | unsigned int good_bytes = result ? 0 : scsi_bufflen(SCpnt); |
c46f0917 DLM |
2032 | unsigned int sector_size = SCpnt->device->sector_size; |
2033 | unsigned int resid; | |
1da177e4 | 2034 | struct scsi_sense_hdr sshdr; |
5999ccff | 2035 | struct request *req = scsi_cmd_to_rq(SCpnt); |
f3fa33ac | 2036 | struct scsi_disk *sdkp = scsi_disk(req->q->disk); |
1da177e4 LT |
2037 | int sense_valid = 0; |
2038 | int sense_deferred = 0; | |
1da177e4 | 2039 | |
89d94756 HR |
2040 | switch (req_op(req)) { |
2041 | case REQ_OP_DISCARD: | |
02d26103 | 2042 | case REQ_OP_WRITE_ZEROES: |
89d94756 HR |
2043 | case REQ_OP_WRITE_SAME: |
2044 | case REQ_OP_ZONE_RESET: | |
d81e9d49 | 2045 | case REQ_OP_ZONE_RESET_ALL: |
ad512f20 AJ |
2046 | case REQ_OP_ZONE_OPEN: |
2047 | case REQ_OP_ZONE_CLOSE: | |
2048 | case REQ_OP_ZONE_FINISH: | |
26e85fcd MP |
2049 | if (!result) { |
2050 | good_bytes = blk_rq_bytes(req); | |
2051 | scsi_set_resid(SCpnt, 0); | |
2052 | } else { | |
2053 | good_bytes = 0; | |
2054 | scsi_set_resid(SCpnt, blk_rq_bytes(req)); | |
89d94756 HR |
2055 | } |
2056 | break; | |
c46f0917 DLM |
2057 | default: |
2058 | /* | |
2059 | * In case of bogus fw or device, we could end up having | |
2060 | * an unaligned partial completion. Check this here and force | |
2061 | * alignment. | |
2062 | */ | |
2063 | resid = scsi_get_resid(SCpnt); | |
2064 | if (resid & (sector_size - 1)) { | |
2065 | sd_printk(KERN_INFO, sdkp, | |
2066 | "Unaligned partial completion (resid=%u, sector_sz=%u)\n", | |
2067 | resid, sector_size); | |
670d8be2 | 2068 | scsi_print_command(SCpnt); |
c46f0917 DLM |
2069 | resid = min(scsi_bufflen(SCpnt), |
2070 | round_up(resid, sector_size)); | |
2071 | scsi_set_resid(SCpnt, resid); | |
2072 | } | |
26e85fcd | 2073 | } |
6a32a8ae | 2074 | |
1da177e4 LT |
2075 | if (result) { |
2076 | sense_valid = scsi_command_normalize_sense(SCpnt, &sshdr); | |
2077 | if (sense_valid) | |
2078 | sense_deferred = scsi_sense_is_deferred(&sshdr); | |
2079 | } | |
2a863ba8 DJ |
2080 | sdkp->medium_access_timed_out = 0; |
2081 | ||
464a00c9 | 2082 | if (!scsi_status_is_check_condition(result) && |
03aba2f7 LT |
2083 | (!sense_valid || sense_deferred)) |
2084 | goto out; | |
2085 | ||
2086 | switch (sshdr.sense_key) { | |
2087 | case HARDWARE_ERROR: | |
2088 | case MEDIUM_ERROR: | |
af55ff67 | 2089 | good_bytes = sd_completed_bytes(SCpnt); |
03aba2f7 LT |
2090 | break; |
2091 | case RECOVERED_ERROR: | |
af55ff67 MP |
2092 | good_bytes = scsi_bufflen(SCpnt); |
2093 | break; | |
10dab226 JW |
2094 | case NO_SENSE: |
2095 | /* This indicates a false check condition, so ignore it. An | |
2096 | * unknown amount of data was transferred so treat it as an | |
2097 | * error. | |
2098 | */ | |
10dab226 JW |
2099 | SCpnt->result = 0; |
2100 | memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); | |
2101 | break; | |
c98a0eb0 MP |
2102 | case ABORTED_COMMAND: |
2103 | if (sshdr.asc == 0x10) /* DIF: Target detected corruption */ | |
2104 | good_bytes = sd_completed_bytes(SCpnt); | |
2105 | break; | |
2106 | case ILLEGAL_REQUEST: | |
d227ec26 CH |
2107 | switch (sshdr.asc) { |
2108 | case 0x10: /* DIX: Host detected corruption */ | |
af55ff67 | 2109 | good_bytes = sd_completed_bytes(SCpnt); |
d227ec26 CH |
2110 | break; |
2111 | case 0x20: /* INVALID COMMAND OPCODE */ | |
2112 | case 0x24: /* INVALID FIELD IN CDB */ | |
2113 | switch (SCpnt->cmnd[0]) { | |
5db44863 MP |
2114 | case UNMAP: |
2115 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
2116 | break; | |
2117 | case WRITE_SAME_16: | |
2118 | case WRITE_SAME: | |
d227ec26 | 2119 | if (SCpnt->cmnd[1] & 8) { /* UNMAP */ |
5db44863 | 2120 | sd_config_discard(sdkp, SD_LBP_DISABLE); |
d227ec26 | 2121 | } else { |
5db44863 MP |
2122 | sdkp->device->no_write_same = 1; |
2123 | sd_config_write_same(sdkp); | |
e8064021 | 2124 | req->rq_flags |= RQF_QUIET; |
5db44863 | 2125 | } |
d227ec26 | 2126 | break; |
5db44863 MP |
2127 | } |
2128 | } | |
03aba2f7 LT |
2129 | break; |
2130 | default: | |
2131 | break; | |
1da177e4 | 2132 | } |
89d94756 | 2133 | |
03aba2f7 | 2134 | out: |
89d94756 | 2135 | if (sd_is_zoned(sdkp)) |
5795eb44 | 2136 | good_bytes = sd_zbc_complete(SCpnt, good_bytes, &sshdr); |
89d94756 | 2137 | |
ef61329d HR |
2138 | SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO, SCpnt, |
2139 | "sd_done: completed %d of %d bytes\n", | |
2140 | good_bytes, scsi_bufflen(SCpnt))); | |
2141 | ||
7b3d9545 | 2142 | return good_bytes; |
1da177e4 LT |
2143 | } |
2144 | ||
1da177e4 LT |
2145 | /* |
2146 | * spinup disk - called only in sd_revalidate_disk() | |
2147 | */ | |
2148 | static void | |
e73aec82 | 2149 | sd_spinup_disk(struct scsi_disk *sdkp) |
ea73a9f2 | 2150 | { |
1da177e4 | 2151 | unsigned char cmd[10]; |
4451e472 | 2152 | unsigned long spintime_expire = 0; |
1da177e4 LT |
2153 | int retries, spintime; |
2154 | unsigned int the_result; | |
2155 | struct scsi_sense_hdr sshdr; | |
2156 | int sense_valid = 0; | |
2157 | ||
2158 | spintime = 0; | |
2159 | ||
2160 | /* Spin up drives, as required. Only do this at boot time */ | |
2161 | /* Spinup needs to be done for module loads too. */ | |
2162 | do { | |
2163 | retries = 0; | |
2164 | ||
2165 | do { | |
4521428c HK |
2166 | bool media_was_present = sdkp->media_present; |
2167 | ||
1da177e4 LT |
2168 | cmd[0] = TEST_UNIT_READY; |
2169 | memset((void *) &cmd[1], 0, 9); | |
2170 | ||
ea73a9f2 JB |
2171 | the_result = scsi_execute_req(sdkp->device, cmd, |
2172 | DMA_NONE, NULL, 0, | |
2173 | &sshdr, SD_TIMEOUT, | |
0610959f | 2174 | sdkp->max_retries, NULL); |
1da177e4 | 2175 | |
b4d38e38 AS |
2176 | /* |
2177 | * If the drive has indicated to us that it | |
2178 | * doesn't have any media in it, don't bother | |
2179 | * with any more polling. | |
2180 | */ | |
848ade90 | 2181 | if (media_not_present(sdkp, &sshdr)) { |
4521428c HK |
2182 | if (media_was_present) |
2183 | sd_printk(KERN_NOTICE, sdkp, "Media removed, stopped polling\n"); | |
b4d38e38 | 2184 | return; |
848ade90 | 2185 | } |
b4d38e38 | 2186 | |
1da177e4 | 2187 | if (the_result) |
ea73a9f2 | 2188 | sense_valid = scsi_sense_valid(&sshdr); |
1da177e4 | 2189 | retries++; |
464a00c9 | 2190 | } while (retries < 3 && |
1da177e4 | 2191 | (!scsi_status_is_good(the_result) || |
464a00c9 | 2192 | (scsi_status_is_check_condition(the_result) && |
1da177e4 LT |
2193 | sense_valid && sshdr.sense_key == UNIT_ATTENTION))); |
2194 | ||
464a00c9 | 2195 | if (!scsi_status_is_check_condition(the_result)) { |
1da177e4 LT |
2196 | /* no sense, TUR either succeeded or failed |
2197 | * with a status error */ | |
e73aec82 | 2198 | if(!spintime && !scsi_status_is_good(the_result)) { |
ef61329d HR |
2199 | sd_print_result(sdkp, "Test Unit Ready failed", |
2200 | the_result); | |
e73aec82 | 2201 | } |
1da177e4 LT |
2202 | break; |
2203 | } | |
ef61329d | 2204 | |
1da177e4 LT |
2205 | /* |
2206 | * The device does not want the automatic start to be issued. | |
2207 | */ | |
33dd6f92 | 2208 | if (sdkp->device->no_start_on_add) |
1da177e4 | 2209 | break; |
1da177e4 | 2210 | |
33dd6f92 MW |
2211 | if (sense_valid && sshdr.sense_key == NOT_READY) { |
2212 | if (sshdr.asc == 4 && sshdr.ascq == 3) | |
2213 | break; /* manual intervention required */ | |
2214 | if (sshdr.asc == 4 && sshdr.ascq == 0xb) | |
2215 | break; /* standby */ | |
2216 | if (sshdr.asc == 4 && sshdr.ascq == 0xc) | |
2217 | break; /* unavailable */ | |
505aa4b6 MR |
2218 | if (sshdr.asc == 4 && sshdr.ascq == 0x1b) |
2219 | break; /* sanitize in progress */ | |
33dd6f92 MW |
2220 | /* |
2221 | * Issue command to spin up drive when not ready | |
2222 | */ | |
1da177e4 | 2223 | if (!spintime) { |
e73aec82 | 2224 | sd_printk(KERN_NOTICE, sdkp, "Spinning up disk..."); |
1da177e4 LT |
2225 | cmd[0] = START_STOP; |
2226 | cmd[1] = 1; /* Return immediately */ | |
2227 | memset((void *) &cmd[2], 0, 8); | |
2228 | cmd[4] = 1; /* Start spin cycle */ | |
d2886ea3 SR |
2229 | if (sdkp->device->start_stop_pwr_cond) |
2230 | cmd[4] |= 1 << 4; | |
ea73a9f2 JB |
2231 | scsi_execute_req(sdkp->device, cmd, DMA_NONE, |
2232 | NULL, 0, &sshdr, | |
0610959f | 2233 | SD_TIMEOUT, sdkp->max_retries, |
f4f4e47e | 2234 | NULL); |
4451e472 AS |
2235 | spintime_expire = jiffies + 100 * HZ; |
2236 | spintime = 1; | |
1da177e4 | 2237 | } |
1da177e4 LT |
2238 | /* Wait 1 second for next try */ |
2239 | msleep(1000); | |
3a1d0783 | 2240 | printk(KERN_CONT "."); |
4451e472 AS |
2241 | |
2242 | /* | |
2243 | * Wait for USB flash devices with slow firmware. | |
2244 | * Yes, this sense key/ASC combination shouldn't | |
2245 | * occur here. It's characteristic of these devices. | |
2246 | */ | |
2247 | } else if (sense_valid && | |
2248 | sshdr.sense_key == UNIT_ATTENTION && | |
2249 | sshdr.asc == 0x28) { | |
2250 | if (!spintime) { | |
2251 | spintime_expire = jiffies + 5 * HZ; | |
2252 | spintime = 1; | |
2253 | } | |
2254 | /* Wait 1 second for next try */ | |
2255 | msleep(1000); | |
1da177e4 LT |
2256 | } else { |
2257 | /* we don't understand the sense code, so it's | |
2258 | * probably pointless to loop */ | |
2259 | if(!spintime) { | |
e73aec82 MP |
2260 | sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n"); |
2261 | sd_print_sense_hdr(sdkp, &sshdr); | |
1da177e4 LT |
2262 | } |
2263 | break; | |
2264 | } | |
2265 | ||
4451e472 | 2266 | } while (spintime && time_before_eq(jiffies, spintime_expire)); |
1da177e4 LT |
2267 | |
2268 | if (spintime) { | |
2269 | if (scsi_status_is_good(the_result)) | |
3a1d0783 | 2270 | printk(KERN_CONT "ready\n"); |
1da177e4 | 2271 | else |
3a1d0783 | 2272 | printk(KERN_CONT "not responding...\n"); |
1da177e4 LT |
2273 | } |
2274 | } | |
2275 | ||
e0597d70 MP |
2276 | /* |
2277 | * Determine whether disk supports Data Integrity Field. | |
2278 | */ | |
fe542396 | 2279 | static int sd_read_protection_type(struct scsi_disk *sdkp, unsigned char *buffer) |
e0597d70 MP |
2280 | { |
2281 | struct scsi_device *sdp = sdkp->device; | |
2282 | u8 type; | |
fe542396 | 2283 | int ret = 0; |
e0597d70 | 2284 | |
465f4eda XC |
2285 | if (scsi_device_protection(sdp) == 0 || (buffer[12] & 1) == 0) { |
2286 | sdkp->protection_type = 0; | |
fe542396 | 2287 | return ret; |
465f4eda | 2288 | } |
35e1a5d9 MP |
2289 | |
2290 | type = ((buffer[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */ | |
2291 | ||
8475c811 | 2292 | if (type > T10_PI_TYPE3_PROTECTION) |
fe542396 MP |
2293 | ret = -ENODEV; |
2294 | else if (scsi_host_dif_capable(sdp->host, type)) | |
2295 | ret = 1; | |
2296 | ||
2297 | if (sdkp->first_scan || type != sdkp->protection_type) | |
2298 | switch (ret) { | |
2299 | case -ENODEV: | |
2300 | sd_printk(KERN_ERR, sdkp, "formatted with unsupported" \ | |
2301 | " protection type %u. Disabling disk!\n", | |
2302 | type); | |
2303 | break; | |
2304 | case 1: | |
2305 | sd_printk(KERN_NOTICE, sdkp, | |
2306 | "Enabling DIF Type %u protection\n", type); | |
2307 | break; | |
2308 | case 0: | |
2309 | sd_printk(KERN_NOTICE, sdkp, | |
2310 | "Disabling DIF Type %u protection\n", type); | |
2311 | break; | |
2312 | } | |
e0597d70 | 2313 | |
be922f47 MP |
2314 | sdkp->protection_type = type; |
2315 | ||
fe542396 | 2316 | return ret; |
e0597d70 MP |
2317 | } |
2318 | ||
0da205e0 MW |
2319 | static void read_capacity_error(struct scsi_disk *sdkp, struct scsi_device *sdp, |
2320 | struct scsi_sense_hdr *sshdr, int sense_valid, | |
2321 | int the_result) | |
2322 | { | |
464a00c9 | 2323 | if (sense_valid) |
0da205e0 MW |
2324 | sd_print_sense_hdr(sdkp, sshdr); |
2325 | else | |
2326 | sd_printk(KERN_NOTICE, sdkp, "Sense not available.\n"); | |
2327 | ||
2328 | /* | |
2329 | * Set dirty bit for removable devices if not ready - | |
2330 | * sometimes drives will not report this properly. | |
2331 | */ | |
2332 | if (sdp->removable && | |
2333 | sense_valid && sshdr->sense_key == NOT_READY) | |
2bae0093 | 2334 | set_media_not_present(sdkp); |
0da205e0 MW |
2335 | |
2336 | /* | |
2337 | * We used to set media_present to 0 here to indicate no media | |
2338 | * in the drive, but some drives fail read capacity even with | |
2339 | * media present, so we can't do that. | |
2340 | */ | |
2341 | sdkp->capacity = 0; /* unknown mapped to zero - as usual */ | |
2342 | } | |
2343 | ||
2344 | #define RC16_LEN 32 | |
2345 | #if RC16_LEN > SD_BUF_SIZE | |
2346 | #error RC16_LEN must not be more than SD_BUF_SIZE | |
2347 | #endif | |
2348 | ||
3233ac19 JB |
2349 | #define READ_CAPACITY_RETRIES_ON_RESET 10 |
2350 | ||
0da205e0 MW |
2351 | static int read_capacity_16(struct scsi_disk *sdkp, struct scsi_device *sdp, |
2352 | unsigned char *buffer) | |
ea73a9f2 | 2353 | { |
1da177e4 | 2354 | unsigned char cmd[16]; |
1da177e4 LT |
2355 | struct scsi_sense_hdr sshdr; |
2356 | int sense_valid = 0; | |
0da205e0 | 2357 | int the_result; |
3233ac19 | 2358 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
ea09bcc9 | 2359 | unsigned int alignment; |
0da205e0 MW |
2360 | unsigned long long lba; |
2361 | unsigned sector_size; | |
1da177e4 | 2362 | |
5ce524bd HG |
2363 | if (sdp->no_read_capacity_16) |
2364 | return -EINVAL; | |
2365 | ||
1da177e4 | 2366 | do { |
0da205e0 | 2367 | memset(cmd, 0, 16); |
eb846d9f | 2368 | cmd[0] = SERVICE_ACTION_IN_16; |
0da205e0 MW |
2369 | cmd[1] = SAI_READ_CAPACITY_16; |
2370 | cmd[13] = RC16_LEN; | |
2371 | memset(buffer, 0, RC16_LEN); | |
2372 | ||
ea73a9f2 | 2373 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, |
0da205e0 | 2374 | buffer, RC16_LEN, &sshdr, |
0610959f | 2375 | SD_TIMEOUT, sdkp->max_retries, NULL); |
1da177e4 | 2376 | |
ea73a9f2 | 2377 | if (media_not_present(sdkp, &sshdr)) |
0da205e0 | 2378 | return -ENODEV; |
1da177e4 | 2379 | |
ced202f7 | 2380 | if (the_result > 0) { |
ea73a9f2 | 2381 | sense_valid = scsi_sense_valid(&sshdr); |
2b301307 MW |
2382 | if (sense_valid && |
2383 | sshdr.sense_key == ILLEGAL_REQUEST && | |
2384 | (sshdr.asc == 0x20 || sshdr.asc == 0x24) && | |
2385 | sshdr.ascq == 0x00) | |
2386 | /* Invalid Command Operation Code or | |
2387 | * Invalid Field in CDB, just retry | |
2388 | * silently with RC10 */ | |
2389 | return -EINVAL; | |
3233ac19 JB |
2390 | if (sense_valid && |
2391 | sshdr.sense_key == UNIT_ATTENTION && | |
2392 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) | |
2393 | /* Device reset might occur several times, | |
2394 | * give it one more chance */ | |
2395 | if (--reset_retries > 0) | |
2396 | continue; | |
2b301307 | 2397 | } |
1da177e4 LT |
2398 | retries--; |
2399 | ||
2400 | } while (the_result && retries); | |
2401 | ||
0da205e0 | 2402 | if (the_result) { |
ef61329d | 2403 | sd_print_result(sdkp, "Read Capacity(16) failed", the_result); |
0da205e0 MW |
2404 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); |
2405 | return -EINVAL; | |
2406 | } | |
e73aec82 | 2407 | |
8f76d151 DH |
2408 | sector_size = get_unaligned_be32(&buffer[8]); |
2409 | lba = get_unaligned_be64(&buffer[0]); | |
0da205e0 | 2410 | |
fe542396 MP |
2411 | if (sd_read_protection_type(sdkp, buffer) < 0) { |
2412 | sdkp->capacity = 0; | |
2413 | return -ENODEV; | |
2414 | } | |
0da205e0 | 2415 | |
ea09bcc9 | 2416 | /* Logical blocks per physical block exponent */ |
526f7c79 | 2417 | sdkp->physical_block_size = (1 << (buffer[13] & 0xf)) * sector_size; |
ea09bcc9 | 2418 | |
89d94756 HR |
2419 | /* RC basis */ |
2420 | sdkp->rc_basis = (buffer[12] >> 4) & 0x3; | |
2421 | ||
ea09bcc9 MP |
2422 | /* Lowest aligned logical block */ |
2423 | alignment = ((buffer[14] & 0x3f) << 8 | buffer[15]) * sector_size; | |
2424 | blk_queue_alignment_offset(sdp->request_queue, alignment); | |
2425 | if (alignment && sdkp->first_scan) | |
2426 | sd_printk(KERN_NOTICE, sdkp, | |
2427 | "physical block alignment offset: %u\n", alignment); | |
2428 | ||
c98a0eb0 MP |
2429 | if (buffer[14] & 0x80) { /* LBPME */ |
2430 | sdkp->lbpme = 1; | |
e339c1a7 | 2431 | |
c98a0eb0 MP |
2432 | if (buffer[14] & 0x40) /* LBPRZ */ |
2433 | sdkp->lbprz = 1; | |
e339c1a7 | 2434 | |
c98a0eb0 | 2435 | sd_config_discard(sdkp, SD_LBP_WS16); |
e339c1a7 MP |
2436 | } |
2437 | ||
0da205e0 MW |
2438 | sdkp->capacity = lba + 1; |
2439 | return sector_size; | |
2440 | } | |
2441 | ||
2442 | static int read_capacity_10(struct scsi_disk *sdkp, struct scsi_device *sdp, | |
2443 | unsigned char *buffer) | |
2444 | { | |
2445 | unsigned char cmd[16]; | |
2446 | struct scsi_sense_hdr sshdr; | |
2447 | int sense_valid = 0; | |
2448 | int the_result; | |
3233ac19 | 2449 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
0da205e0 MW |
2450 | sector_t lba; |
2451 | unsigned sector_size; | |
2452 | ||
2453 | do { | |
2454 | cmd[0] = READ_CAPACITY; | |
2455 | memset(&cmd[1], 0, 9); | |
2456 | memset(buffer, 0, 8); | |
2457 | ||
2458 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, | |
2459 | buffer, 8, &sshdr, | |
0610959f | 2460 | SD_TIMEOUT, sdkp->max_retries, NULL); |
0da205e0 MW |
2461 | |
2462 | if (media_not_present(sdkp, &sshdr)) | |
2463 | return -ENODEV; | |
2464 | ||
ced202f7 | 2465 | if (the_result > 0) { |
0da205e0 | 2466 | sense_valid = scsi_sense_valid(&sshdr); |
3233ac19 JB |
2467 | if (sense_valid && |
2468 | sshdr.sense_key == UNIT_ATTENTION && | |
2469 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) | |
2470 | /* Device reset might occur several times, | |
2471 | * give it one more chance */ | |
2472 | if (--reset_retries > 0) | |
2473 | continue; | |
2474 | } | |
0da205e0 MW |
2475 | retries--; |
2476 | ||
2477 | } while (the_result && retries); | |
2478 | ||
2479 | if (the_result) { | |
ef61329d | 2480 | sd_print_result(sdkp, "Read Capacity(10) failed", the_result); |
0da205e0 MW |
2481 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); |
2482 | return -EINVAL; | |
2483 | } | |
2484 | ||
8f76d151 DH |
2485 | sector_size = get_unaligned_be32(&buffer[4]); |
2486 | lba = get_unaligned_be32(&buffer[0]); | |
0da205e0 | 2487 | |
5ce524bd HG |
2488 | if (sdp->no_read_capacity_16 && (lba == 0xffffffff)) { |
2489 | /* Some buggy (usb cardreader) devices return an lba of | |
2490 | 0xffffffff when the want to report a size of 0 (with | |
2491 | which they really mean no media is present) */ | |
2492 | sdkp->capacity = 0; | |
5cc10350 | 2493 | sdkp->physical_block_size = sector_size; |
5ce524bd HG |
2494 | return sector_size; |
2495 | } | |
2496 | ||
0da205e0 | 2497 | sdkp->capacity = lba + 1; |
526f7c79 | 2498 | sdkp->physical_block_size = sector_size; |
0da205e0 MW |
2499 | return sector_size; |
2500 | } | |
2501 | ||
2b301307 MW |
2502 | static int sd_try_rc16_first(struct scsi_device *sdp) |
2503 | { | |
f87146bb HR |
2504 | if (sdp->host->max_cmd_len < 16) |
2505 | return 0; | |
6a0bdffa AS |
2506 | if (sdp->try_rc_10_first) |
2507 | return 0; | |
2b301307 MW |
2508 | if (sdp->scsi_level > SCSI_SPC_2) |
2509 | return 1; | |
2510 | if (scsi_device_protection(sdp)) | |
2511 | return 1; | |
2512 | return 0; | |
2513 | } | |
2514 | ||
0da205e0 MW |
2515 | /* |
2516 | * read disk capacity | |
2517 | */ | |
2518 | static void | |
2519 | sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer) | |
2520 | { | |
2521 | int sector_size; | |
2522 | struct scsi_device *sdp = sdkp->device; | |
2523 | ||
2b301307 | 2524 | if (sd_try_rc16_first(sdp)) { |
0da205e0 MW |
2525 | sector_size = read_capacity_16(sdkp, sdp, buffer); |
2526 | if (sector_size == -EOVERFLOW) | |
1da177e4 | 2527 | goto got_data; |
2b301307 MW |
2528 | if (sector_size == -ENODEV) |
2529 | return; | |
2530 | if (sector_size < 0) | |
2531 | sector_size = read_capacity_10(sdkp, sdp, buffer); | |
0da205e0 MW |
2532 | if (sector_size < 0) |
2533 | return; | |
1da177e4 | 2534 | } else { |
0da205e0 MW |
2535 | sector_size = read_capacity_10(sdkp, sdp, buffer); |
2536 | if (sector_size == -EOVERFLOW) | |
2537 | goto got_data; | |
2538 | if (sector_size < 0) | |
2539 | return; | |
2540 | if ((sizeof(sdkp->capacity) > 4) && | |
2541 | (sdkp->capacity > 0xffffffffULL)) { | |
2542 | int old_sector_size = sector_size; | |
2543 | sd_printk(KERN_NOTICE, sdkp, "Very big device. " | |
2544 | "Trying to use READ CAPACITY(16).\n"); | |
2545 | sector_size = read_capacity_16(sdkp, sdp, buffer); | |
2546 | if (sector_size < 0) { | |
2547 | sd_printk(KERN_NOTICE, sdkp, | |
2548 | "Using 0xffffffff as device size\n"); | |
2549 | sdkp->capacity = 1 + (sector_t) 0xffffffff; | |
2550 | sector_size = old_sector_size; | |
2551 | goto got_data; | |
2552 | } | |
597d7400 MP |
2553 | /* Remember that READ CAPACITY(16) succeeded */ |
2554 | sdp->try_rc_10_first = 0; | |
0da205e0 MW |
2555 | } |
2556 | } | |
1da177e4 | 2557 | |
5c211caa AS |
2558 | /* Some devices are known to return the total number of blocks, |
2559 | * not the highest block number. Some devices have versions | |
2560 | * which do this and others which do not. Some devices we might | |
2561 | * suspect of doing this but we don't know for certain. | |
2562 | * | |
2563 | * If we know the reported capacity is wrong, decrement it. If | |
2564 | * we can only guess, then assume the number of blocks is even | |
2565 | * (usually true but not always) and err on the side of lowering | |
2566 | * the capacity. | |
2567 | */ | |
2568 | if (sdp->fix_capacity || | |
2569 | (sdp->guess_capacity && (sdkp->capacity & 0x01))) { | |
2570 | sd_printk(KERN_INFO, sdkp, "Adjusting the sector count " | |
2571 | "from its reported value: %llu\n", | |
2572 | (unsigned long long) sdkp->capacity); | |
1da177e4 | 2573 | --sdkp->capacity; |
61bf54b7 ON |
2574 | } |
2575 | ||
1da177e4 LT |
2576 | got_data: |
2577 | if (sector_size == 0) { | |
2578 | sector_size = 512; | |
e73aec82 MP |
2579 | sd_printk(KERN_NOTICE, sdkp, "Sector size 0 reported, " |
2580 | "assuming 512.\n"); | |
1da177e4 LT |
2581 | } |
2582 | ||
2583 | if (sector_size != 512 && | |
2584 | sector_size != 1024 && | |
2585 | sector_size != 2048 && | |
74856fbf | 2586 | sector_size != 4096) { |
e73aec82 MP |
2587 | sd_printk(KERN_NOTICE, sdkp, "Unsupported sector size %d.\n", |
2588 | sector_size); | |
1da177e4 LT |
2589 | /* |
2590 | * The user might want to re-format the drive with | |
2591 | * a supported sectorsize. Once this happens, it | |
2592 | * would be relatively trivial to set the thing up. | |
2593 | * For this reason, we leave the thing in the table. | |
2594 | */ | |
2595 | sdkp->capacity = 0; | |
2596 | /* | |
2597 | * set a bogus sector size so the normal read/write | |
2598 | * logic in the block layer will eventually refuse any | |
2599 | * request on this device without tripping over power | |
2600 | * of two sector size assumptions | |
2601 | */ | |
2602 | sector_size = 512; | |
2603 | } | |
e1defc4f | 2604 | blk_queue_logical_block_size(sdp->request_queue, sector_size); |
89d94756 HR |
2605 | blk_queue_physical_block_size(sdp->request_queue, |
2606 | sdkp->physical_block_size); | |
2607 | sdkp->device->sector_size = sector_size; | |
7404ad3b | 2608 | |
89d94756 HR |
2609 | if (sdkp->capacity > 0xffffffff) |
2610 | sdp->use_16_for_rw = 1; | |
1da177e4 | 2611 | |
89d94756 | 2612 | } |
1da177e4 | 2613 | |
89d94756 HR |
2614 | /* |
2615 | * Print disk capacity | |
2616 | */ | |
2617 | static void | |
2618 | sd_print_capacity(struct scsi_disk *sdkp, | |
2619 | sector_t old_capacity) | |
2620 | { | |
2621 | int sector_size = sdkp->device->sector_size; | |
2622 | char cap_str_2[10], cap_str_10[10]; | |
ea09bcc9 | 2623 | |
d7e6db20 DLM |
2624 | if (!sdkp->first_scan && old_capacity == sdkp->capacity) |
2625 | return; | |
2626 | ||
89d94756 HR |
2627 | string_get_size(sdkp->capacity, sector_size, |
2628 | STRING_UNITS_2, cap_str_2, sizeof(cap_str_2)); | |
2629 | string_get_size(sdkp->capacity, sector_size, | |
d7e6db20 | 2630 | STRING_UNITS_10, cap_str_10, sizeof(cap_str_10)); |
1da177e4 | 2631 | |
d7e6db20 DLM |
2632 | sd_printk(KERN_NOTICE, sdkp, |
2633 | "%llu %d-byte logical blocks: (%s/%s)\n", | |
2634 | (unsigned long long)sdkp->capacity, | |
2635 | sector_size, cap_str_10, cap_str_2); | |
53ad570b | 2636 | |
d7e6db20 DLM |
2637 | if (sdkp->physical_block_size != sector_size) |
2638 | sd_printk(KERN_NOTICE, sdkp, | |
2639 | "%u-byte physical blocks\n", | |
2640 | sdkp->physical_block_size); | |
1da177e4 LT |
2641 | } |
2642 | ||
2643 | /* called with buffer of length 512 */ | |
2644 | static inline int | |
0610959f | 2645 | sd_do_mode_sense(struct scsi_disk *sdkp, int dbd, int modepage, |
ea73a9f2 JB |
2646 | unsigned char *buffer, int len, struct scsi_mode_data *data, |
2647 | struct scsi_sense_hdr *sshdr) | |
1da177e4 | 2648 | { |
c749301e DLM |
2649 | /* |
2650 | * If we must use MODE SENSE(10), make sure that the buffer length | |
2651 | * is at least 8 bytes so that the mode sense header fits. | |
2652 | */ | |
2653 | if (sdkp->device->use_10_for_ms && len < 8) | |
2654 | len = 8; | |
2655 | ||
0610959f MC |
2656 | return scsi_mode_sense(sdkp->device, dbd, modepage, buffer, len, |
2657 | SD_TIMEOUT, sdkp->max_retries, data, | |
ea73a9f2 | 2658 | sshdr); |
1da177e4 LT |
2659 | } |
2660 | ||
2661 | /* | |
2662 | * read write protect setting, if possible - called only in sd_revalidate_disk() | |
48970800 | 2663 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
2664 | */ |
2665 | static void | |
e73aec82 | 2666 | sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer) |
ea73a9f2 | 2667 | { |
1da177e4 | 2668 | int res; |
ea73a9f2 | 2669 | struct scsi_device *sdp = sdkp->device; |
1da177e4 | 2670 | struct scsi_mode_data data; |
70a9b873 | 2671 | int old_wp = sdkp->write_prot; |
1da177e4 LT |
2672 | |
2673 | set_disk_ro(sdkp->disk, 0); | |
ea73a9f2 | 2674 | if (sdp->skip_ms_page_3f) { |
b2bff6ce | 2675 | sd_first_printk(KERN_NOTICE, sdkp, "Assuming Write Enabled\n"); |
1da177e4 LT |
2676 | return; |
2677 | } | |
2678 | ||
ea73a9f2 | 2679 | if (sdp->use_192_bytes_for_3f) { |
0610959f | 2680 | res = sd_do_mode_sense(sdkp, 0, 0x3F, buffer, 192, &data, NULL); |
1da177e4 LT |
2681 | } else { |
2682 | /* | |
2683 | * First attempt: ask for all pages (0x3F), but only 4 bytes. | |
2684 | * We have to start carefully: some devices hang if we ask | |
2685 | * for more than is available. | |
2686 | */ | |
0610959f | 2687 | res = sd_do_mode_sense(sdkp, 0, 0x3F, buffer, 4, &data, NULL); |
1da177e4 LT |
2688 | |
2689 | /* | |
2690 | * Second attempt: ask for page 0 When only page 0 is | |
2691 | * implemented, a request for page 3F may return Sense Key | |
2692 | * 5: Illegal Request, Sense Code 24: Invalid field in | |
2693 | * CDB. | |
2694 | */ | |
8793613d | 2695 | if (res < 0) |
0610959f | 2696 | res = sd_do_mode_sense(sdkp, 0, 0, buffer, 4, &data, NULL); |
1da177e4 LT |
2697 | |
2698 | /* | |
2699 | * Third attempt: ask 255 bytes, as we did earlier. | |
2700 | */ | |
8793613d | 2701 | if (res < 0) |
0610959f | 2702 | res = sd_do_mode_sense(sdkp, 0, 0x3F, buffer, 255, |
ea73a9f2 | 2703 | &data, NULL); |
1da177e4 LT |
2704 | } |
2705 | ||
8793613d | 2706 | if (res < 0) { |
b2bff6ce | 2707 | sd_first_printk(KERN_WARNING, sdkp, |
e73aec82 | 2708 | "Test WP failed, assume Write Enabled\n"); |
1da177e4 LT |
2709 | } else { |
2710 | sdkp->write_prot = ((data.device_specific & 0x80) != 0); | |
8acf608e | 2711 | set_disk_ro(sdkp->disk, sdkp->write_prot); |
70a9b873 MP |
2712 | if (sdkp->first_scan || old_wp != sdkp->write_prot) { |
2713 | sd_printk(KERN_NOTICE, sdkp, "Write Protect is %s\n", | |
2714 | sdkp->write_prot ? "on" : "off"); | |
df441cc0 | 2715 | sd_printk(KERN_DEBUG, sdkp, "Mode Sense: %4ph\n", buffer); |
70a9b873 | 2716 | } |
1da177e4 LT |
2717 | } |
2718 | } | |
2719 | ||
2720 | /* | |
2721 | * sd_read_cache_type - called only from sd_revalidate_disk() | |
48970800 | 2722 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
2723 | */ |
2724 | static void | |
e73aec82 | 2725 | sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer) |
631e8a13 | 2726 | { |
1da177e4 | 2727 | int len = 0, res; |
ea73a9f2 | 2728 | struct scsi_device *sdp = sdkp->device; |
1da177e4 | 2729 | |
631e8a13 AV |
2730 | int dbd; |
2731 | int modepage; | |
0bcaa111 | 2732 | int first_len; |
1da177e4 LT |
2733 | struct scsi_mode_data data; |
2734 | struct scsi_sense_hdr sshdr; | |
70a9b873 MP |
2735 | int old_wce = sdkp->WCE; |
2736 | int old_rcd = sdkp->RCD; | |
2737 | int old_dpofua = sdkp->DPOFUA; | |
1da177e4 | 2738 | |
39c60a09 JB |
2739 | |
2740 | if (sdkp->cache_override) | |
2741 | return; | |
2742 | ||
0bcaa111 LT |
2743 | first_len = 4; |
2744 | if (sdp->skip_ms_page_8) { | |
2745 | if (sdp->type == TYPE_RBC) | |
2746 | goto defaults; | |
2747 | else { | |
2748 | if (sdp->skip_ms_page_3f) | |
2749 | goto defaults; | |
2750 | modepage = 0x3F; | |
2751 | if (sdp->use_192_bytes_for_3f) | |
2752 | first_len = 192; | |
2753 | dbd = 0; | |
2754 | } | |
2755 | } else if (sdp->type == TYPE_RBC) { | |
631e8a13 AV |
2756 | modepage = 6; |
2757 | dbd = 8; | |
2758 | } else { | |
2759 | modepage = 8; | |
2760 | dbd = 0; | |
2761 | } | |
2762 | ||
1da177e4 | 2763 | /* cautiously ask */ |
0610959f | 2764 | res = sd_do_mode_sense(sdkp, dbd, modepage, buffer, first_len, |
0bcaa111 | 2765 | &data, &sshdr); |
1da177e4 | 2766 | |
8793613d | 2767 | if (res < 0) |
1da177e4 LT |
2768 | goto bad_sense; |
2769 | ||
6d73c851 AV |
2770 | if (!data.header_length) { |
2771 | modepage = 6; | |
0bcaa111 | 2772 | first_len = 0; |
b2bff6ce MP |
2773 | sd_first_printk(KERN_ERR, sdkp, |
2774 | "Missing header in MODE_SENSE response\n"); | |
6d73c851 AV |
2775 | } |
2776 | ||
1da177e4 LT |
2777 | /* that went OK, now ask for the proper length */ |
2778 | len = data.length; | |
2779 | ||
2780 | /* | |
2781 | * We're only interested in the first three bytes, actually. | |
2782 | * But the data cache page is defined for the first 20. | |
2783 | */ | |
2784 | if (len < 3) | |
2785 | goto bad_sense; | |
0bcaa111 | 2786 | else if (len > SD_BUF_SIZE) { |
b2bff6ce | 2787 | sd_first_printk(KERN_NOTICE, sdkp, "Truncating mode parameter " |
0bcaa111 LT |
2788 | "data from %d to %d bytes\n", len, SD_BUF_SIZE); |
2789 | len = SD_BUF_SIZE; | |
2790 | } | |
2791 | if (modepage == 0x3F && sdp->use_192_bytes_for_3f) | |
2792 | len = 192; | |
1da177e4 LT |
2793 | |
2794 | /* Get the data */ | |
0bcaa111 | 2795 | if (len > first_len) |
0610959f | 2796 | res = sd_do_mode_sense(sdkp, dbd, modepage, buffer, len, |
0bcaa111 | 2797 | &data, &sshdr); |
1da177e4 | 2798 | |
8793613d | 2799 | if (!res) { |
631e8a13 | 2800 | int offset = data.header_length + data.block_descriptor_length; |
1da177e4 | 2801 | |
0bcaa111 LT |
2802 | while (offset < len) { |
2803 | u8 page_code = buffer[offset] & 0x3F; | |
2804 | u8 spf = buffer[offset] & 0x40; | |
2805 | ||
2806 | if (page_code == 8 || page_code == 6) { | |
2807 | /* We're interested only in the first 3 bytes. | |
2808 | */ | |
2809 | if (len - offset <= 2) { | |
b2bff6ce MP |
2810 | sd_first_printk(KERN_ERR, sdkp, |
2811 | "Incomplete mode parameter " | |
2812 | "data\n"); | |
0bcaa111 LT |
2813 | goto defaults; |
2814 | } else { | |
2815 | modepage = page_code; | |
2816 | goto Page_found; | |
2817 | } | |
2818 | } else { | |
2819 | /* Go to the next page */ | |
2820 | if (spf && len - offset > 3) | |
2821 | offset += 4 + (buffer[offset+2] << 8) + | |
2822 | buffer[offset+3]; | |
2823 | else if (!spf && len - offset > 1) | |
2824 | offset += 2 + buffer[offset+1]; | |
2825 | else { | |
b2bff6ce MP |
2826 | sd_first_printk(KERN_ERR, sdkp, |
2827 | "Incomplete mode " | |
2828 | "parameter data\n"); | |
0bcaa111 LT |
2829 | goto defaults; |
2830 | } | |
2831 | } | |
48970800 AV |
2832 | } |
2833 | ||
c4da1205 MK |
2834 | sd_first_printk(KERN_WARNING, sdkp, |
2835 | "No Caching mode page found\n"); | |
984f1733 AS |
2836 | goto defaults; |
2837 | ||
0bcaa111 | 2838 | Page_found: |
631e8a13 AV |
2839 | if (modepage == 8) { |
2840 | sdkp->WCE = ((buffer[offset + 2] & 0x04) != 0); | |
2841 | sdkp->RCD = ((buffer[offset + 2] & 0x01) != 0); | |
2842 | } else { | |
2843 | sdkp->WCE = ((buffer[offset + 2] & 0x01) == 0); | |
2844 | sdkp->RCD = 0; | |
2845 | } | |
1da177e4 | 2846 | |
007365ad | 2847 | sdkp->DPOFUA = (data.device_specific & 0x10) != 0; |
b14bf2d0 AS |
2848 | if (sdp->broken_fua) { |
2849 | sd_first_printk(KERN_NOTICE, sdkp, "Disabling FUA\n"); | |
2850 | sdkp->DPOFUA = 0; | |
26f28197 DLM |
2851 | } else if (sdkp->DPOFUA && !sdkp->device->use_10_for_rw && |
2852 | !sdkp->device->use_16_for_rw) { | |
b2bff6ce | 2853 | sd_first_printk(KERN_NOTICE, sdkp, |
e73aec82 | 2854 | "Uses READ/WRITE(6), disabling FUA\n"); |
007365ad TH |
2855 | sdkp->DPOFUA = 0; |
2856 | } | |
2857 | ||
2eefd57b SRT |
2858 | /* No cache flush allowed for write protected devices */ |
2859 | if (sdkp->WCE && sdkp->write_prot) | |
2860 | sdkp->WCE = 0; | |
2861 | ||
70a9b873 MP |
2862 | if (sdkp->first_scan || old_wce != sdkp->WCE || |
2863 | old_rcd != sdkp->RCD || old_dpofua != sdkp->DPOFUA) | |
2864 | sd_printk(KERN_NOTICE, sdkp, | |
2865 | "Write cache: %s, read cache: %s, %s\n", | |
2866 | sdkp->WCE ? "enabled" : "disabled", | |
2867 | sdkp->RCD ? "disabled" : "enabled", | |
2868 | sdkp->DPOFUA ? "supports DPO and FUA" | |
2869 | : "doesn't support DPO or FUA"); | |
1da177e4 LT |
2870 | |
2871 | return; | |
2872 | } | |
2873 | ||
2874 | bad_sense: | |
ea73a9f2 | 2875 | if (scsi_sense_valid(&sshdr) && |
1da177e4 LT |
2876 | sshdr.sense_key == ILLEGAL_REQUEST && |
2877 | sshdr.asc == 0x24 && sshdr.ascq == 0x0) | |
e73aec82 | 2878 | /* Invalid field in CDB */ |
b2bff6ce | 2879 | sd_first_printk(KERN_NOTICE, sdkp, "Cache data unavailable\n"); |
1da177e4 | 2880 | else |
b2bff6ce MP |
2881 | sd_first_printk(KERN_ERR, sdkp, |
2882 | "Asking for cache data failed\n"); | |
1da177e4 LT |
2883 | |
2884 | defaults: | |
b81478d8 | 2885 | if (sdp->wce_default_on) { |
b2bff6ce MP |
2886 | sd_first_printk(KERN_NOTICE, sdkp, |
2887 | "Assuming drive cache: write back\n"); | |
b81478d8 NJ |
2888 | sdkp->WCE = 1; |
2889 | } else { | |
c4da1205 | 2890 | sd_first_printk(KERN_WARNING, sdkp, |
b2bff6ce | 2891 | "Assuming drive cache: write through\n"); |
b81478d8 NJ |
2892 | sdkp->WCE = 0; |
2893 | } | |
1da177e4 | 2894 | sdkp->RCD = 0; |
48970800 | 2895 | sdkp->DPOFUA = 0; |
1da177e4 LT |
2896 | } |
2897 | ||
e0597d70 MP |
2898 | /* |
2899 | * The ATO bit indicates whether the DIF application tag is available | |
2900 | * for use by the operating system. | |
2901 | */ | |
439d77f7 | 2902 | static void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer) |
e0597d70 MP |
2903 | { |
2904 | int res, offset; | |
2905 | struct scsi_device *sdp = sdkp->device; | |
2906 | struct scsi_mode_data data; | |
2907 | struct scsi_sense_hdr sshdr; | |
2908 | ||
89d94756 | 2909 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) |
e0597d70 MP |
2910 | return; |
2911 | ||
2912 | if (sdkp->protection_type == 0) | |
2913 | return; | |
2914 | ||
2915 | res = scsi_mode_sense(sdp, 1, 0x0a, buffer, 36, SD_TIMEOUT, | |
0610959f | 2916 | sdkp->max_retries, &data, &sshdr); |
e0597d70 | 2917 | |
8793613d | 2918 | if (res < 0 || !data.header_length || |
e0597d70 | 2919 | data.length < 6) { |
b2bff6ce | 2920 | sd_first_printk(KERN_WARNING, sdkp, |
e0597d70 MP |
2921 | "getting Control mode page failed, assume no ATO\n"); |
2922 | ||
2923 | if (scsi_sense_valid(&sshdr)) | |
2924 | sd_print_sense_hdr(sdkp, &sshdr); | |
2925 | ||
2926 | return; | |
2927 | } | |
2928 | ||
2929 | offset = data.header_length + data.block_descriptor_length; | |
2930 | ||
2931 | if ((buffer[offset] & 0x3f) != 0x0a) { | |
b2bff6ce | 2932 | sd_first_printk(KERN_ERR, sdkp, "ATO Got wrong page\n"); |
e0597d70 MP |
2933 | return; |
2934 | } | |
2935 | ||
2936 | if ((buffer[offset + 5] & 0x80) == 0) | |
2937 | return; | |
2938 | ||
2939 | sdkp->ATO = 1; | |
2940 | ||
2941 | return; | |
2942 | } | |
2943 | ||
d11b6916 MP |
2944 | /** |
2945 | * sd_read_block_limits - Query disk device for preferred I/O sizes. | |
7529fbb0 | 2946 | * @sdkp: disk to query |
d11b6916 MP |
2947 | */ |
2948 | static void sd_read_block_limits(struct scsi_disk *sdkp) | |
2949 | { | |
2950 | unsigned int sector_sz = sdkp->device->sector_size; | |
bb2d3de1 | 2951 | const int vpd_len = 64; |
e3deec09 | 2952 | unsigned char *buffer = kmalloc(vpd_len, GFP_KERNEL); |
d11b6916 | 2953 | |
e3deec09 JB |
2954 | if (!buffer || |
2955 | /* Block Limits VPD */ | |
2956 | scsi_get_vpd_page(sdkp->device, 0xb0, buffer, vpd_len)) | |
2957 | goto out; | |
d11b6916 MP |
2958 | |
2959 | blk_queue_io_min(sdkp->disk->queue, | |
2960 | get_unaligned_be16(&buffer[6]) * sector_sz); | |
ca369d51 MP |
2961 | |
2962 | sdkp->max_xfer_blocks = get_unaligned_be32(&buffer[8]); | |
2963 | sdkp->opt_xfer_blocks = get_unaligned_be32(&buffer[12]); | |
d11b6916 | 2964 | |
c98a0eb0 MP |
2965 | if (buffer[3] == 0x3c) { |
2966 | unsigned int lba_count, desc_count; | |
e339c1a7 | 2967 | |
5db44863 | 2968 | sdkp->max_ws_blocks = (u32)get_unaligned_be64(&buffer[36]); |
e339c1a7 | 2969 | |
c98a0eb0 | 2970 | if (!sdkp->lbpme) |
045d3fe7 | 2971 | goto out; |
045d3fe7 | 2972 | |
c98a0eb0 MP |
2973 | lba_count = get_unaligned_be32(&buffer[20]); |
2974 | desc_count = get_unaligned_be32(&buffer[24]); | |
045d3fe7 | 2975 | |
c98a0eb0 MP |
2976 | if (lba_count && desc_count) |
2977 | sdkp->max_unmap_blocks = lba_count; | |
e339c1a7 | 2978 | |
c98a0eb0 | 2979 | sdkp->unmap_granularity = get_unaligned_be32(&buffer[28]); |
e339c1a7 MP |
2980 | |
2981 | if (buffer[32] & 0x80) | |
c98a0eb0 | 2982 | sdkp->unmap_alignment = |
e339c1a7 | 2983 | get_unaligned_be32(&buffer[32]) & ~(1 << 31); |
c98a0eb0 MP |
2984 | |
2985 | if (!sdkp->lbpvpd) { /* LBP VPD page not provided */ | |
2986 | ||
2987 | if (sdkp->max_unmap_blocks) | |
2988 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
2989 | else | |
2990 | sd_config_discard(sdkp, SD_LBP_WS16); | |
2991 | ||
2992 | } else { /* LBP VPD page tells us what to use */ | |
bcd069bb | 2993 | if (sdkp->lbpu && sdkp->max_unmap_blocks) |
e461338b MP |
2994 | sd_config_discard(sdkp, SD_LBP_UNMAP); |
2995 | else if (sdkp->lbpws) | |
c98a0eb0 MP |
2996 | sd_config_discard(sdkp, SD_LBP_WS16); |
2997 | else if (sdkp->lbpws10) | |
2998 | sd_config_discard(sdkp, SD_LBP_WS10); | |
2999 | else | |
3000 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
3001 | } | |
e339c1a7 MP |
3002 | } |
3003 | ||
e3deec09 | 3004 | out: |
d11b6916 MP |
3005 | kfree(buffer); |
3006 | } | |
3007 | ||
3821d768 MP |
3008 | /** |
3009 | * sd_read_block_characteristics - Query block dev. characteristics | |
7529fbb0 | 3010 | * @sdkp: disk to query |
3821d768 MP |
3011 | */ |
3012 | static void sd_read_block_characteristics(struct scsi_disk *sdkp) | |
3013 | { | |
89d94756 | 3014 | struct request_queue *q = sdkp->disk->queue; |
e3deec09 | 3015 | unsigned char *buffer; |
3821d768 | 3016 | u16 rot; |
bb2d3de1 | 3017 | const int vpd_len = 64; |
3821d768 | 3018 | |
e3deec09 | 3019 | buffer = kmalloc(vpd_len, GFP_KERNEL); |
3821d768 | 3020 | |
e3deec09 JB |
3021 | if (!buffer || |
3022 | /* Block Device Characteristics VPD */ | |
3023 | scsi_get_vpd_page(sdkp->device, 0xb1, buffer, vpd_len)) | |
3024 | goto out; | |
3821d768 MP |
3025 | |
3026 | rot = get_unaligned_be16(&buffer[4]); | |
3027 | ||
b277da0a | 3028 | if (rot == 1) { |
8b904b5b BVA |
3029 | blk_queue_flag_set(QUEUE_FLAG_NONROT, q); |
3030 | blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, q); | |
b277da0a | 3031 | } |
3821d768 | 3032 | |
68af412c DLM |
3033 | if (sdkp->device->type == TYPE_ZBC) { |
3034 | /* Host-managed */ | |
27ba3e8f | 3035 | blk_queue_set_zoned(sdkp->disk, BLK_ZONED_HM); |
68af412c DLM |
3036 | } else { |
3037 | sdkp->zoned = (buffer[8] >> 4) & 3; | |
27ba3e8f | 3038 | if (sdkp->zoned == 1) { |
68af412c | 3039 | /* Host-aware */ |
27ba3e8f | 3040 | blk_queue_set_zoned(sdkp->disk, BLK_ZONED_HA); |
b7205307 | 3041 | } else { |
27ba3e8f DLM |
3042 | /* Regular disk or drive managed disk */ |
3043 | blk_queue_set_zoned(sdkp->disk, BLK_ZONED_NONE); | |
b7205307 | 3044 | } |
68af412c | 3045 | } |
27ba3e8f DLM |
3046 | |
3047 | if (!sdkp->first_scan) | |
3048 | goto out; | |
3049 | ||
3050 | if (blk_queue_is_zoned(q)) { | |
89d94756 HR |
3051 | sd_printk(KERN_NOTICE, sdkp, "Host-%s zoned block device\n", |
3052 | q->limits.zoned == BLK_ZONED_HM ? "managed" : "aware"); | |
27ba3e8f DLM |
3053 | } else { |
3054 | if (sdkp->zoned == 1) | |
3055 | sd_printk(KERN_NOTICE, sdkp, | |
3056 | "Host-aware SMR disk used as regular disk\n"); | |
3057 | else if (sdkp->zoned == 2) | |
3058 | sd_printk(KERN_NOTICE, sdkp, | |
3059 | "Drive-managed SMR disk\n"); | |
3060 | } | |
89d94756 | 3061 | |
e3deec09 | 3062 | out: |
3821d768 MP |
3063 | kfree(buffer); |
3064 | } | |
3065 | ||
045d3fe7 | 3066 | /** |
c98a0eb0 | 3067 | * sd_read_block_provisioning - Query provisioning VPD page |
7529fbb0 | 3068 | * @sdkp: disk to query |
045d3fe7 | 3069 | */ |
c98a0eb0 | 3070 | static void sd_read_block_provisioning(struct scsi_disk *sdkp) |
045d3fe7 MP |
3071 | { |
3072 | unsigned char *buffer; | |
3073 | const int vpd_len = 8; | |
3074 | ||
c98a0eb0 | 3075 | if (sdkp->lbpme == 0) |
045d3fe7 MP |
3076 | return; |
3077 | ||
3078 | buffer = kmalloc(vpd_len, GFP_KERNEL); | |
3079 | ||
3080 | if (!buffer || scsi_get_vpd_page(sdkp->device, 0xb2, buffer, vpd_len)) | |
3081 | goto out; | |
3082 | ||
c98a0eb0 MP |
3083 | sdkp->lbpvpd = 1; |
3084 | sdkp->lbpu = (buffer[5] >> 7) & 1; /* UNMAP */ | |
3085 | sdkp->lbpws = (buffer[5] >> 6) & 1; /* WRITE SAME(16) with UNMAP */ | |
3086 | sdkp->lbpws10 = (buffer[5] >> 5) & 1; /* WRITE SAME(10) with UNMAP */ | |
045d3fe7 MP |
3087 | |
3088 | out: | |
3089 | kfree(buffer); | |
3090 | } | |
3091 | ||
5db44863 MP |
3092 | static void sd_read_write_same(struct scsi_disk *sdkp, unsigned char *buffer) |
3093 | { | |
66c28f97 MP |
3094 | struct scsi_device *sdev = sdkp->device; |
3095 | ||
54b2b50c MP |
3096 | if (sdev->host->no_write_same) { |
3097 | sdev->no_write_same = 1; | |
3098 | ||
3099 | return; | |
3100 | } | |
3101 | ||
66c28f97 | 3102 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, INQUIRY) < 0) { |
af73623f BS |
3103 | /* too large values might cause issues with arcmsr */ |
3104 | int vpd_buf_len = 64; | |
3105 | ||
66c28f97 MP |
3106 | sdev->no_report_opcodes = 1; |
3107 | ||
3108 | /* Disable WRITE SAME if REPORT SUPPORTED OPERATION | |
3109 | * CODES is unsupported and the device has an ATA | |
3110 | * Information VPD page (SAT). | |
3111 | */ | |
af73623f | 3112 | if (!scsi_get_vpd_page(sdev, 0x89, buffer, vpd_buf_len)) |
66c28f97 MP |
3113 | sdev->no_write_same = 1; |
3114 | } | |
3115 | ||
3116 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME_16) == 1) | |
5db44863 | 3117 | sdkp->ws16 = 1; |
66c28f97 MP |
3118 | |
3119 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME) == 1) | |
3120 | sdkp->ws10 = 1; | |
5db44863 MP |
3121 | } |
3122 | ||
d80210f2 CH |
3123 | static void sd_read_security(struct scsi_disk *sdkp, unsigned char *buffer) |
3124 | { | |
3125 | struct scsi_device *sdev = sdkp->device; | |
3126 | ||
3127 | if (!sdev->security_supported) | |
3128 | return; | |
3129 | ||
3130 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, | |
3131 | SECURITY_PROTOCOL_IN) == 1 && | |
3132 | scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, | |
3133 | SECURITY_PROTOCOL_OUT) == 1) | |
3134 | sdkp->security = 1; | |
3135 | } | |
3136 | ||
e815d365 DLM |
3137 | static inline sector_t sd64_to_sectors(struct scsi_disk *sdkp, u8 *buf) |
3138 | { | |
3139 | return logical_to_sectors(sdkp->device, get_unaligned_be64(buf)); | |
3140 | } | |
3141 | ||
3142 | /** | |
3143 | * sd_read_cpr - Query concurrent positioning ranges | |
3144 | * @sdkp: disk to query | |
3145 | */ | |
3146 | static void sd_read_cpr(struct scsi_disk *sdkp) | |
3147 | { | |
3148 | struct blk_independent_access_ranges *iars = NULL; | |
3149 | unsigned char *buffer = NULL; | |
3150 | unsigned int nr_cpr = 0; | |
3151 | int i, vpd_len, buf_len = SD_BUF_SIZE; | |
3152 | u8 *desc; | |
3153 | ||
3154 | /* | |
3155 | * We need to have the capacity set first for the block layer to be | |
3156 | * able to check the ranges. | |
3157 | */ | |
3158 | if (sdkp->first_scan) | |
3159 | return; | |
3160 | ||
3161 | if (!sdkp->capacity) | |
3162 | goto out; | |
3163 | ||
3164 | /* | |
3165 | * Concurrent Positioning Ranges VPD: there can be at most 256 ranges, | |
3166 | * leading to a maximum page size of 64 + 256*32 bytes. | |
3167 | */ | |
3168 | buf_len = 64 + 256*32; | |
3169 | buffer = kmalloc(buf_len, GFP_KERNEL); | |
3170 | if (!buffer || scsi_get_vpd_page(sdkp->device, 0xb9, buffer, buf_len)) | |
3171 | goto out; | |
3172 | ||
3173 | /* We must have at least a 64B header and one 32B range descriptor */ | |
3174 | vpd_len = get_unaligned_be16(&buffer[2]) + 3; | |
3175 | if (vpd_len > buf_len || vpd_len < 64 + 32 || (vpd_len & 31)) { | |
3176 | sd_printk(KERN_ERR, sdkp, | |
3177 | "Invalid Concurrent Positioning Ranges VPD page\n"); | |
3178 | goto out; | |
3179 | } | |
3180 | ||
3181 | nr_cpr = (vpd_len - 64) / 32; | |
3182 | if (nr_cpr == 1) { | |
3183 | nr_cpr = 0; | |
3184 | goto out; | |
3185 | } | |
3186 | ||
3187 | iars = disk_alloc_independent_access_ranges(sdkp->disk, nr_cpr); | |
3188 | if (!iars) { | |
3189 | nr_cpr = 0; | |
3190 | goto out; | |
3191 | } | |
3192 | ||
3193 | desc = &buffer[64]; | |
3194 | for (i = 0; i < nr_cpr; i++, desc += 32) { | |
3195 | if (desc[0] != i) { | |
3196 | sd_printk(KERN_ERR, sdkp, | |
3197 | "Invalid Concurrent Positioning Range number\n"); | |
3198 | nr_cpr = 0; | |
3199 | break; | |
3200 | } | |
3201 | ||
3202 | iars->ia_range[i].sector = sd64_to_sectors(sdkp, desc + 8); | |
3203 | iars->ia_range[i].nr_sectors = sd64_to_sectors(sdkp, desc + 16); | |
3204 | } | |
3205 | ||
3206 | out: | |
3207 | disk_set_independent_access_ranges(sdkp->disk, iars); | |
3208 | if (nr_cpr && sdkp->nr_actuators != nr_cpr) { | |
3209 | sd_printk(KERN_NOTICE, sdkp, | |
3210 | "%u concurrent positioning ranges\n", nr_cpr); | |
3211 | sdkp->nr_actuators = nr_cpr; | |
3212 | } | |
3213 | ||
3214 | kfree(buffer); | |
3215 | } | |
3216 | ||
a83da8a4 MP |
3217 | /* |
3218 | * Determine the device's preferred I/O size for reads and writes | |
3219 | * unless the reported value is unreasonably small, large, not a | |
3220 | * multiple of the physical block size, or simply garbage. | |
3221 | */ | |
3222 | static bool sd_validate_opt_xfer_size(struct scsi_disk *sdkp, | |
3223 | unsigned int dev_max) | |
3224 | { | |
3225 | struct scsi_device *sdp = sdkp->device; | |
3226 | unsigned int opt_xfer_bytes = | |
3227 | logical_to_bytes(sdp, sdkp->opt_xfer_blocks); | |
3228 | ||
1d5de5bd MP |
3229 | if (sdkp->opt_xfer_blocks == 0) |
3230 | return false; | |
3231 | ||
a83da8a4 MP |
3232 | if (sdkp->opt_xfer_blocks > dev_max) { |
3233 | sd_first_printk(KERN_WARNING, sdkp, | |
3234 | "Optimal transfer size %u logical blocks " \ | |
3235 | "> dev_max (%u logical blocks)\n", | |
3236 | sdkp->opt_xfer_blocks, dev_max); | |
3237 | return false; | |
3238 | } | |
3239 | ||
3240 | if (sdkp->opt_xfer_blocks > SD_DEF_XFER_BLOCKS) { | |
3241 | sd_first_printk(KERN_WARNING, sdkp, | |
3242 | "Optimal transfer size %u logical blocks " \ | |
3243 | "> sd driver limit (%u logical blocks)\n", | |
3244 | sdkp->opt_xfer_blocks, SD_DEF_XFER_BLOCKS); | |
3245 | return false; | |
3246 | } | |
3247 | ||
3248 | if (opt_xfer_bytes < PAGE_SIZE) { | |
3249 | sd_first_printk(KERN_WARNING, sdkp, | |
3250 | "Optimal transfer size %u bytes < " \ | |
3251 | "PAGE_SIZE (%u bytes)\n", | |
3252 | opt_xfer_bytes, (unsigned int)PAGE_SIZE); | |
3253 | return false; | |
3254 | } | |
3255 | ||
3256 | if (opt_xfer_bytes & (sdkp->physical_block_size - 1)) { | |
3257 | sd_first_printk(KERN_WARNING, sdkp, | |
3258 | "Optimal transfer size %u bytes not a " \ | |
3259 | "multiple of physical block size (%u bytes)\n", | |
3260 | opt_xfer_bytes, sdkp->physical_block_size); | |
3261 | return false; | |
3262 | } | |
3263 | ||
3264 | sd_first_printk(KERN_INFO, sdkp, "Optimal transfer size %u bytes\n", | |
3265 | opt_xfer_bytes); | |
3266 | return true; | |
3267 | } | |
3268 | ||
1da177e4 LT |
3269 | /** |
3270 | * sd_revalidate_disk - called the first time a new disk is seen, | |
3271 | * performs disk spin up, read_capacity, etc. | |
3272 | * @disk: struct gendisk we care about | |
3273 | **/ | |
3274 | static int sd_revalidate_disk(struct gendisk *disk) | |
3275 | { | |
3276 | struct scsi_disk *sdkp = scsi_disk(disk); | |
3277 | struct scsi_device *sdp = sdkp->device; | |
ca369d51 | 3278 | struct request_queue *q = sdkp->disk->queue; |
89d94756 | 3279 | sector_t old_capacity = sdkp->capacity; |
1da177e4 | 3280 | unsigned char *buffer; |
ca369d51 | 3281 | unsigned int dev_max, rw_max; |
1da177e4 | 3282 | |
fa0d34be MP |
3283 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, |
3284 | "sd_revalidate_disk\n")); | |
1da177e4 LT |
3285 | |
3286 | /* | |
3287 | * If the device is offline, don't try and read capacity or any | |
3288 | * of the other niceties. | |
3289 | */ | |
3290 | if (!scsi_device_online(sdp)) | |
3291 | goto out; | |
3292 | ||
a6123f14 | 3293 | buffer = kmalloc(SD_BUF_SIZE, GFP_KERNEL); |
1da177e4 | 3294 | if (!buffer) { |
e73aec82 MP |
3295 | sd_printk(KERN_WARNING, sdkp, "sd_revalidate_disk: Memory " |
3296 | "allocation failure.\n"); | |
ea73a9f2 | 3297 | goto out; |
1da177e4 LT |
3298 | } |
3299 | ||
e73aec82 | 3300 | sd_spinup_disk(sdkp); |
1da177e4 LT |
3301 | |
3302 | /* | |
3303 | * Without media there is no reason to ask; moreover, some devices | |
3304 | * react badly if we do. | |
3305 | */ | |
3306 | if (sdkp->media_present) { | |
e73aec82 | 3307 | sd_read_capacity(sdkp, buffer); |
ffd4bc2a | 3308 | |
e4a05698 JB |
3309 | /* |
3310 | * set the default to rotational. All non-rotational devices | |
3311 | * support the block characteristics VPD page, which will | |
3312 | * cause this to be updated correctly and any device which | |
3313 | * doesn't support it should be treated as rotational. | |
3314 | */ | |
3315 | blk_queue_flag_clear(QUEUE_FLAG_NONROT, q); | |
3316 | blk_queue_flag_set(QUEUE_FLAG_ADD_RANDOM, q); | |
3317 | ||
5ddfe085 | 3318 | if (scsi_device_supports_vpd(sdp)) { |
c98a0eb0 | 3319 | sd_read_block_provisioning(sdkp); |
ffd4bc2a MP |
3320 | sd_read_block_limits(sdkp); |
3321 | sd_read_block_characteristics(sdkp); | |
89d94756 | 3322 | sd_zbc_read_zones(sdkp, buffer); |
ffd4bc2a MP |
3323 | } |
3324 | ||
89d94756 HR |
3325 | sd_print_capacity(sdkp, old_capacity); |
3326 | ||
e73aec82 MP |
3327 | sd_read_write_protect_flag(sdkp, buffer); |
3328 | sd_read_cache_type(sdkp, buffer); | |
e0597d70 | 3329 | sd_read_app_tag_own(sdkp, buffer); |
5db44863 | 3330 | sd_read_write_same(sdkp, buffer); |
d80210f2 | 3331 | sd_read_security(sdkp, buffer); |
e815d365 | 3332 | sd_read_cpr(sdkp); |
1da177e4 | 3333 | } |
461d4e90 TH |
3334 | |
3335 | /* | |
3336 | * We now have all cache related info, determine how we deal | |
4913efe4 | 3337 | * with flush requests. |
461d4e90 | 3338 | */ |
cb2fb68d | 3339 | sd_set_flush_flag(sdkp); |
461d4e90 | 3340 | |
ca369d51 MP |
3341 | /* Initial block count limit based on CDB TRANSFER LENGTH field size. */ |
3342 | dev_max = sdp->use_16_for_rw ? SD_MAX_XFER_BLOCKS : SD_DEF_XFER_BLOCKS; | |
3343 | ||
3344 | /* Some devices report a maximum block count for READ/WRITE requests. */ | |
3345 | dev_max = min_not_zero(dev_max, sdkp->max_xfer_blocks); | |
3346 | q->limits.max_dev_sectors = logical_to_sectors(sdp, dev_max); | |
3347 | ||
a83da8a4 | 3348 | if (sd_validate_opt_xfer_size(sdkp, dev_max)) { |
6b7e9cde MP |
3349 | q->limits.io_opt = logical_to_bytes(sdp, sdkp->opt_xfer_blocks); |
3350 | rw_max = logical_to_sectors(sdp, sdkp->opt_xfer_blocks); | |
ea697a8b MP |
3351 | } else { |
3352 | q->limits.io_opt = 0; | |
67804145 FZ |
3353 | rw_max = min_not_zero(logical_to_sectors(sdp, dev_max), |
3354 | (sector_t)BLK_DEF_MAX_SECTORS); | |
ea697a8b | 3355 | } |
3a9794d3 | 3356 | |
77082ca5 MP |
3357 | /* Do not exceed controller limit */ |
3358 | rw_max = min(rw_max, queue_max_hw_sectors(q)); | |
3359 | ||
3360 | /* | |
3361 | * Only update max_sectors if previously unset or if the current value | |
3362 | * exceeds the capabilities of the hardware. | |
3363 | */ | |
3364 | if (sdkp->first_scan || | |
3365 | q->limits.max_sectors > q->limits.max_dev_sectors || | |
3366 | q->limits.max_sectors > q->limits.max_hw_sectors) | |
3367 | q->limits.max_sectors = rw_max; | |
3368 | ||
3369 | sdkp->first_scan = 0; | |
4f258a46 | 3370 | |
449f4ec9 | 3371 | set_capacity_and_notify(disk, logical_to_sectors(sdp, sdkp->capacity)); |
5db44863 | 3372 | sd_config_write_same(sdkp); |
1da177e4 LT |
3373 | kfree(buffer); |
3374 | ||
a3d8a257 DLM |
3375 | /* |
3376 | * For a zoned drive, revalidating the zones can be done only once | |
3377 | * the gendisk capacity is set. So if this fails, set back the gendisk | |
3378 | * capacity to 0. | |
3379 | */ | |
3380 | if (sd_zbc_revalidate_zones(sdkp)) | |
449f4ec9 | 3381 | set_capacity_and_notify(disk, 0); |
a3d8a257 | 3382 | |
1da177e4 LT |
3383 | out: |
3384 | return 0; | |
3385 | } | |
3386 | ||
72ec24bd TH |
3387 | /** |
3388 | * sd_unlock_native_capacity - unlock native capacity | |
3389 | * @disk: struct gendisk to set capacity for | |
3390 | * | |
3391 | * Block layer calls this function if it detects that partitions | |
3392 | * on @disk reach beyond the end of the device. If the SCSI host | |
3393 | * implements ->unlock_native_capacity() method, it's invoked to | |
3394 | * give it a chance to adjust the device capacity. | |
3395 | * | |
3396 | * CONTEXT: | |
3397 | * Defined by block layer. Might sleep. | |
3398 | */ | |
3399 | static void sd_unlock_native_capacity(struct gendisk *disk) | |
3400 | { | |
3401 | struct scsi_device *sdev = scsi_disk(disk)->device; | |
3402 | ||
3403 | if (sdev->host->hostt->unlock_native_capacity) | |
3404 | sdev->host->hostt->unlock_native_capacity(sdev); | |
3405 | } | |
3406 | ||
3e1a7ff8 TH |
3407 | /** |
3408 | * sd_format_disk_name - format disk name | |
3409 | * @prefix: name prefix - ie. "sd" for SCSI disks | |
3410 | * @index: index of the disk to format name for | |
3411 | * @buf: output buffer | |
3412 | * @buflen: length of the output buffer | |
3413 | * | |
3414 | * SCSI disk names starts at sda. The 26th device is sdz and the | |
3415 | * 27th is sdaa. The last one for two lettered suffix is sdzz | |
3416 | * which is followed by sdaaa. | |
3417 | * | |
3418 | * This is basically 26 base counting with one extra 'nil' entry | |
3ad2f3fb | 3419 | * at the beginning from the second digit on and can be |
3e1a7ff8 TH |
3420 | * determined using similar method as 26 base conversion with the |
3421 | * index shifted -1 after each digit is computed. | |
3422 | * | |
3423 | * CONTEXT: | |
3424 | * Don't care. | |
3425 | * | |
3426 | * RETURNS: | |
3427 | * 0 on success, -errno on failure. | |
3428 | */ | |
3429 | static int sd_format_disk_name(char *prefix, int index, char *buf, int buflen) | |
3430 | { | |
3431 | const int base = 'z' - 'a' + 1; | |
3432 | char *begin = buf + strlen(prefix); | |
3433 | char *end = buf + buflen; | |
3434 | char *p; | |
3435 | int unit; | |
3436 | ||
3437 | p = end - 1; | |
3438 | *p = '\0'; | |
3439 | unit = base; | |
3440 | do { | |
3441 | if (p == begin) | |
3442 | return -EINVAL; | |
3443 | *--p = 'a' + (index % unit); | |
3444 | index = (index / unit) - 1; | |
3445 | } while (index >= 0); | |
3446 | ||
3447 | memmove(begin, p, end - p); | |
3448 | memcpy(buf, prefix, strlen(prefix)); | |
3449 | ||
3450 | return 0; | |
3451 | } | |
3452 | ||
1da177e4 LT |
3453 | /** |
3454 | * sd_probe - called during driver initialization and whenever a | |
3455 | * new scsi device is attached to the system. It is called once | |
3456 | * for each scsi device (not just disks) present. | |
3457 | * @dev: pointer to device object | |
3458 | * | |
3459 | * Returns 0 if successful (or not interested in this scsi device | |
3460 | * (e.g. scanner)); 1 when there is an error. | |
3461 | * | |
3462 | * Note: this function is invoked from the scsi mid-level. | |
3463 | * This function sets up the mapping between a given | |
3464 | * <host,channel,id,lun> (found in sdp) and new device name | |
3465 | * (e.g. /dev/sda). More precisely it is the block device major | |
3466 | * and minor number that is chosen here. | |
3467 | * | |
2db93ce8 PU |
3468 | * Assume sd_probe is not re-entrant (for time being) |
3469 | * Also think about sd_probe() and sd_remove() running coincidentally. | |
1da177e4 LT |
3470 | **/ |
3471 | static int sd_probe(struct device *dev) | |
3472 | { | |
3473 | struct scsi_device *sdp = to_scsi_device(dev); | |
3474 | struct scsi_disk *sdkp; | |
3475 | struct gendisk *gd; | |
439d77f7 | 3476 | int index; |
1da177e4 LT |
3477 | int error; |
3478 | ||
6fe8c1db | 3479 | scsi_autopm_get_device(sdp); |
1da177e4 | 3480 | error = -ENODEV; |
89d94756 HR |
3481 | if (sdp->type != TYPE_DISK && |
3482 | sdp->type != TYPE_ZBC && | |
3483 | sdp->type != TYPE_MOD && | |
3484 | sdp->type != TYPE_RBC) | |
1da177e4 LT |
3485 | goto out; |
3486 | ||
bf1b4659 DLM |
3487 | if (!IS_ENABLED(CONFIG_BLK_DEV_ZONED) && sdp->type == TYPE_ZBC) { |
3488 | sdev_printk(KERN_WARNING, sdp, | |
3489 | "Unsupported ZBC host-managed device.\n"); | |
89d94756 | 3490 | goto out; |
bf1b4659 DLM |
3491 | } |
3492 | ||
9ccfc756 | 3493 | SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO, sdp, |
2db93ce8 | 3494 | "sd_probe\n")); |
1da177e4 LT |
3495 | |
3496 | error = -ENOMEM; | |
24669f75 | 3497 | sdkp = kzalloc(sizeof(*sdkp), GFP_KERNEL); |
1da177e4 LT |
3498 | if (!sdkp) |
3499 | goto out; | |
3500 | ||
4a1fa41d CH |
3501 | gd = __alloc_disk_node(sdp->request_queue, NUMA_NO_NODE, |
3502 | &sd_bio_compl_lkclass); | |
1da177e4 | 3503 | if (!gd) |
c01228db | 3504 | goto out_free; |
1da177e4 | 3505 | |
94015080 MW |
3506 | index = ida_alloc(&sd_index_ida, GFP_KERNEL); |
3507 | if (index < 0) { | |
21208ae5 | 3508 | sdev_printk(KERN_WARNING, sdp, "sd_probe: memory exhausted.\n"); |
1da177e4 | 3509 | goto out_put; |
1a03ae0f MR |
3510 | } |
3511 | ||
3e1a7ff8 | 3512 | error = sd_format_disk_name("sd", index, gd->disk_name, DISK_NAME_LEN); |
21208ae5 DK |
3513 | if (error) { |
3514 | sdev_printk(KERN_WARNING, sdp, "SCSI disk (sd) name length exceeded.\n"); | |
f27bac27 | 3515 | goto out_free_index; |
21208ae5 | 3516 | } |
f27bac27 | 3517 | |
1da177e4 LT |
3518 | sdkp->device = sdp; |
3519 | sdkp->driver = &sd_template; | |
3520 | sdkp->disk = gd; | |
3521 | sdkp->index = index; | |
0610959f | 3522 | sdkp->max_retries = SD_MAX_RETRIES; |
409f3499 | 3523 | atomic_set(&sdkp->openers, 0); |
9e1a1537 | 3524 | atomic_set(&sdkp->device->ioerr_cnt, 0); |
1da177e4 | 3525 | |
601e7638 JB |
3526 | if (!sdp->request_queue->rq_timeout) { |
3527 | if (sdp->type != TYPE_MOD) | |
3528 | blk_queue_rq_timeout(sdp->request_queue, SD_TIMEOUT); | |
3529 | else | |
3530 | blk_queue_rq_timeout(sdp->request_queue, | |
3531 | SD_MOD_TIMEOUT); | |
3532 | } | |
3533 | ||
3534 | device_initialize(&sdkp->dev); | |
265dfe8e | 3535 | sdkp->dev.parent = get_device(dev); |
601e7638 | 3536 | sdkp->dev.class = &sd_disk_class; |
02aa2a37 | 3537 | dev_set_name(&sdkp->dev, "%s", dev_name(dev)); |
601e7638 | 3538 | |
dee0586e | 3539 | error = device_add(&sdkp->dev); |
265dfe8e ML |
3540 | if (error) { |
3541 | put_device(&sdkp->dev); | |
3542 | goto out; | |
3543 | } | |
601e7638 | 3544 | |
478a8a05 | 3545 | dev_set_drvdata(dev, sdkp); |
601e7638 | 3546 | |
82a54da6 BVA |
3547 | gd->major = sd_major((index & 0xf0) >> 4); |
3548 | gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00); | |
a58bd768 | 3549 | gd->minors = SD_MINORS; |
82a54da6 BVA |
3550 | |
3551 | gd->fops = &sd_fops; | |
3552 | gd->private_data = &sdkp->driver; | |
82a54da6 BVA |
3553 | |
3554 | /* defaults, until the device tells us otherwise */ | |
3555 | sdp->sector_size = 512; | |
3556 | sdkp->capacity = 0; | |
3557 | sdkp->media_present = 1; | |
3558 | sdkp->write_prot = 0; | |
3559 | sdkp->cache_override = 0; | |
3560 | sdkp->WCE = 0; | |
3561 | sdkp->RCD = 0; | |
3562 | sdkp->ATO = 0; | |
3563 | sdkp->first_scan = 1; | |
3564 | sdkp->max_medium_access_timeouts = SD_MAX_MEDIUM_TIMEOUTS; | |
3565 | ||
3566 | sd_revalidate_disk(gd); | |
3567 | ||
82a54da6 BVA |
3568 | if (sdp->removable) { |
3569 | gd->flags |= GENHD_FL_REMOVABLE; | |
3570 | gd->events |= DISK_EVENT_MEDIA_CHANGE; | |
3571 | gd->event_flags = DISK_EVENT_FLAG_POLL | DISK_EVENT_FLAG_UEVENT; | |
3572 | } | |
3573 | ||
3574 | blk_pm_runtime_init(sdp->request_queue, dev); | |
c74f8056 SC |
3575 | if (sdp->rpm_autosuspend) { |
3576 | pm_runtime_set_autosuspend_delay(dev, | |
3577 | sdp->host->hostt->rpm_autosuspend_delay); | |
3578 | } | |
2a7a891f LC |
3579 | |
3580 | error = device_add_disk(dev, gd, NULL); | |
3581 | if (error) { | |
3582 | put_device(&sdkp->dev); | |
3583 | goto out; | |
3584 | } | |
3585 | ||
82a54da6 BVA |
3586 | if (sdkp->capacity) |
3587 | sd_dif_config_host(sdkp); | |
3588 | ||
3589 | sd_revalidate_disk(gd); | |
3590 | ||
3591 | if (sdkp->security) { | |
0610959f | 3592 | sdkp->opal_dev = init_opal_dev(sdkp, &sd_sec_submit); |
82a54da6 BVA |
3593 | if (sdkp->opal_dev) |
3594 | sd_printk(KERN_NOTICE, sdkp, "supports TCG Opal\n"); | |
3595 | } | |
3596 | ||
3597 | sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n", | |
3598 | sdp->removable ? "removable " : ""); | |
3599 | scsi_autopm_put_device(sdp); | |
1da177e4 LT |
3600 | |
3601 | return 0; | |
3602 | ||
f27bac27 | 3603 | out_free_index: |
94015080 | 3604 | ida_free(&sd_index_ida, index); |
6bdaa1f1 | 3605 | out_put: |
1da177e4 | 3606 | put_disk(gd); |
f170396c | 3607 | out_free: |
5795eb44 | 3608 | sd_zbc_release_disk(sdkp); |
f170396c | 3609 | kfree(sdkp); |
6bdaa1f1 | 3610 | out: |
6fe8c1db | 3611 | scsi_autopm_put_device(sdp); |
1da177e4 LT |
3612 | return error; |
3613 | } | |
3614 | ||
3615 | /** | |
3616 | * sd_remove - called whenever a scsi disk (previously recognized by | |
3617 | * sd_probe) is detached from the system. It is called (potentially | |
3618 | * multiple times) during sd module unload. | |
f2a3313d | 3619 | * @dev: pointer to device object |
1da177e4 LT |
3620 | * |
3621 | * Note: this function is invoked from the scsi mid-level. | |
3622 | * This function potentially frees up a device name (e.g. /dev/sdc) | |
3623 | * that could be re-used by a subsequent sd_probe(). | |
3624 | * This function is not called when the built-in sd driver is "exit-ed". | |
3625 | **/ | |
3626 | static int sd_remove(struct device *dev) | |
3627 | { | |
601e7638 | 3628 | struct scsi_disk *sdkp; |
1da177e4 | 3629 | |
601e7638 | 3630 | sdkp = dev_get_drvdata(dev); |
478a8a05 AS |
3631 | scsi_autopm_get_device(sdkp->device); |
3632 | ||
ee959b00 | 3633 | device_del(&sdkp->dev); |
1da177e4 LT |
3634 | del_gendisk(sdkp->disk); |
3635 | sd_shutdown(dev); | |
39b7f1e2 | 3636 | |
d80210f2 CH |
3637 | free_opal_dev(sdkp->opal_dev); |
3638 | ||
0b950672 | 3639 | mutex_lock(&sd_ref_mutex); |
39b7f1e2 | 3640 | dev_set_drvdata(dev, NULL); |
ee959b00 | 3641 | put_device(&sdkp->dev); |
0b950672 | 3642 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
3643 | |
3644 | return 0; | |
3645 | } | |
3646 | ||
3647 | /** | |
3648 | * scsi_disk_release - Called to free the scsi_disk structure | |
ee959b00 | 3649 | * @dev: pointer to embedded class device |
1da177e4 | 3650 | * |
0b950672 | 3651 | * sd_ref_mutex must be held entering this routine. Because it is |
1da177e4 LT |
3652 | * called on last put, you should always use the scsi_disk_get() |
3653 | * scsi_disk_put() helpers which manipulate the semaphore directly | |
ee959b00 | 3654 | * and never do a direct put_device. |
1da177e4 | 3655 | **/ |
ee959b00 | 3656 | static void scsi_disk_release(struct device *dev) |
1da177e4 | 3657 | { |
ee959b00 | 3658 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
1da177e4 | 3659 | struct gendisk *disk = sdkp->disk; |
c14a5726 BVA |
3660 | struct request_queue *q = disk->queue; |
3661 | ||
94015080 | 3662 | ida_free(&sd_index_ida, sdkp->index); |
c01228db | 3663 | |
c14a5726 BVA |
3664 | /* |
3665 | * Wait until all requests that are in progress have completed. | |
3666 | * This is necessary to avoid that e.g. scsi_end_request() crashes | |
3667 | * due to clearing the disk->private_data pointer. Wait from inside | |
3668 | * scsi_disk_release() instead of from sd_release() to avoid that | |
3669 | * freezing and unfreezing the request queue affects user space I/O | |
3670 | * in case multiple processes open a /dev/sd... node concurrently. | |
3671 | */ | |
3672 | blk_mq_freeze_queue(q); | |
3673 | blk_mq_unfreeze_queue(q); | |
3674 | ||
1da177e4 | 3675 | disk->private_data = NULL; |
1da177e4 | 3676 | put_disk(disk); |
39b7f1e2 | 3677 | put_device(&sdkp->device->sdev_gendev); |
1da177e4 | 3678 | |
5795eb44 JT |
3679 | sd_zbc_release_disk(sdkp); |
3680 | ||
1da177e4 LT |
3681 | kfree(sdkp); |
3682 | } | |
3683 | ||
cc5d2c8c | 3684 | static int sd_start_stop_device(struct scsi_disk *sdkp, int start) |
c3c94c5a TH |
3685 | { |
3686 | unsigned char cmd[6] = { START_STOP }; /* START_VALID */ | |
3687 | struct scsi_sense_hdr sshdr; | |
cc5d2c8c | 3688 | struct scsi_device *sdp = sdkp->device; |
c3c94c5a TH |
3689 | int res; |
3690 | ||
3691 | if (start) | |
3692 | cmd[4] |= 1; /* START */ | |
3693 | ||
d2886ea3 SR |
3694 | if (sdp->start_stop_pwr_cond) |
3695 | cmd[4] |= start ? 1 << 4 : 3 << 4; /* Active or Standby */ | |
3696 | ||
c3c94c5a TH |
3697 | if (!scsi_device_online(sdp)) |
3698 | return -ENODEV; | |
3699 | ||
fcbfffe2 | 3700 | res = scsi_execute(sdp, cmd, DMA_NONE, NULL, 0, NULL, &sshdr, |
0610959f | 3701 | SD_TIMEOUT, sdkp->max_retries, 0, RQF_PM, NULL); |
c3c94c5a | 3702 | if (res) { |
ef61329d | 3703 | sd_print_result(sdkp, "Start/Stop Unit failed", res); |
464a00c9 | 3704 | if (res > 0 && scsi_sense_valid(&sshdr)) { |
cc5d2c8c | 3705 | sd_print_sense_hdr(sdkp, &sshdr); |
95897910 | 3706 | /* 0x3a is medium not present */ |
464a00c9 HR |
3707 | if (sshdr.asc == 0x3a) |
3708 | res = 0; | |
3709 | } | |
c3c94c5a TH |
3710 | } |
3711 | ||
95897910 ON |
3712 | /* SCSI error codes must not go to the generic layer */ |
3713 | if (res) | |
3714 | return -EIO; | |
3715 | ||
3716 | return 0; | |
c3c94c5a TH |
3717 | } |
3718 | ||
1da177e4 LT |
3719 | /* |
3720 | * Send a SYNCHRONIZE CACHE instruction down to the device through | |
3721 | * the normal SCSI command structure. Wait for the command to | |
3722 | * complete. | |
3723 | */ | |
3724 | static void sd_shutdown(struct device *dev) | |
3725 | { | |
3d9a1f53 | 3726 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
1da177e4 LT |
3727 | |
3728 | if (!sdkp) | |
3729 | return; /* this can happen */ | |
3730 | ||
54f57588 | 3731 | if (pm_runtime_suspended(dev)) |
3d9a1f53 | 3732 | return; |
54f57588 | 3733 | |
95897910 | 3734 | if (sdkp->WCE && sdkp->media_present) { |
e73aec82 | 3735 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
4fa83244 | 3736 | sd_sync_cache(sdkp, NULL); |
39b7f1e2 | 3737 | } |
c3c94c5a | 3738 | |
cc5d2c8c JB |
3739 | if (system_state != SYSTEM_RESTART && sdkp->device->manage_start_stop) { |
3740 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); | |
3741 | sd_start_stop_device(sdkp, 0); | |
c3c94c5a | 3742 | } |
39b7f1e2 | 3743 | } |
1da177e4 | 3744 | |
95897910 | 3745 | static int sd_suspend_common(struct device *dev, bool ignore_stop_errors) |
c3c94c5a | 3746 | { |
3d9a1f53 | 3747 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
4fa83244 | 3748 | struct scsi_sense_hdr sshdr; |
09ff92fe | 3749 | int ret = 0; |
c3c94c5a | 3750 | |
13b43891 AS |
3751 | if (!sdkp) /* E.g.: runtime suspend following sd_remove() */ |
3752 | return 0; | |
c3c94c5a | 3753 | |
95897910 | 3754 | if (sdkp->WCE && sdkp->media_present) { |
cc5d2c8c | 3755 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
4fa83244 DB |
3756 | ret = sd_sync_cache(sdkp, &sshdr); |
3757 | ||
95897910 ON |
3758 | if (ret) { |
3759 | /* ignore OFFLINE device */ | |
3760 | if (ret == -ENODEV) | |
4fa83244 DB |
3761 | return 0; |
3762 | ||
3763 | if (!scsi_sense_valid(&sshdr) || | |
3764 | sshdr.sense_key != ILLEGAL_REQUEST) | |
3765 | return ret; | |
3766 | ||
3767 | /* | |
3768 | * sshdr.sense_key == ILLEGAL_REQUEST means this drive | |
3769 | * doesn't support sync. There's not much to do and | |
3770 | * suspend shouldn't fail. | |
3771 | */ | |
ed91f7ed | 3772 | ret = 0; |
95897910 | 3773 | } |
c3c94c5a TH |
3774 | } |
3775 | ||
691e3d31 | 3776 | if (sdkp->device->manage_start_stop) { |
cc5d2c8c | 3777 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); |
95897910 | 3778 | /* an error is not worth aborting a system sleep */ |
cc5d2c8c | 3779 | ret = sd_start_stop_device(sdkp, 0); |
95897910 ON |
3780 | if (ignore_stop_errors) |
3781 | ret = 0; | |
c3c94c5a TH |
3782 | } |
3783 | ||
09ff92fe | 3784 | return ret; |
c3c94c5a TH |
3785 | } |
3786 | ||
95897910 ON |
3787 | static int sd_suspend_system(struct device *dev) |
3788 | { | |
9131bff6 BVA |
3789 | if (pm_runtime_suspended(dev)) |
3790 | return 0; | |
3791 | ||
95897910 ON |
3792 | return sd_suspend_common(dev, true); |
3793 | } | |
3794 | ||
3795 | static int sd_suspend_runtime(struct device *dev) | |
3796 | { | |
3797 | return sd_suspend_common(dev, false); | |
3798 | } | |
3799 | ||
c3c94c5a TH |
3800 | static int sd_resume(struct device *dev) |
3801 | { | |
3d9a1f53 | 3802 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
d80210f2 | 3803 | int ret; |
c3c94c5a | 3804 | |
13b43891 AS |
3805 | if (!sdkp) /* E.g.: runtime resume at the start of sd_probe() */ |
3806 | return 0; | |
3807 | ||
cc5d2c8c | 3808 | if (!sdkp->device->manage_start_stop) |
3d9a1f53 | 3809 | return 0; |
c3c94c5a | 3810 | |
cc5d2c8c | 3811 | sd_printk(KERN_NOTICE, sdkp, "Starting disk\n"); |
d80210f2 CH |
3812 | ret = sd_start_stop_device(sdkp, 1); |
3813 | if (!ret) | |
3814 | opal_unlock_from_suspend(sdkp->opal_dev); | |
3815 | return ret; | |
c3c94c5a TH |
3816 | } |
3817 | ||
1c957532 BVA |
3818 | static int sd_resume_system(struct device *dev) |
3819 | { | |
9131bff6 BVA |
3820 | if (pm_runtime_suspended(dev)) |
3821 | return 0; | |
3822 | ||
1c957532 BVA |
3823 | return sd_resume(dev); |
3824 | } | |
3825 | ||
ed4246d3 MK |
3826 | static int sd_resume_runtime(struct device *dev) |
3827 | { | |
3828 | struct scsi_disk *sdkp = dev_get_drvdata(dev); | |
85374b63 MC |
3829 | struct scsi_device *sdp; |
3830 | ||
3831 | if (!sdkp) /* E.g.: runtime resume at the start of sd_probe() */ | |
3832 | return 0; | |
3833 | ||
3834 | sdp = sdkp->device; | |
ed4246d3 MK |
3835 | |
3836 | if (sdp->ignore_media_change) { | |
3837 | /* clear the device's sense data */ | |
3838 | static const u8 cmd[10] = { REQUEST_SENSE }; | |
3839 | ||
3840 | if (scsi_execute(sdp, cmd, DMA_NONE, NULL, 0, NULL, | |
3841 | NULL, sdp->request_queue->rq_timeout, 1, 0, | |
3842 | RQF_PM, NULL)) | |
3843 | sd_printk(KERN_NOTICE, sdkp, | |
3844 | "Failed to clear sense data\n"); | |
3845 | } | |
3846 | ||
3847 | return sd_resume(dev); | |
3848 | } | |
3849 | ||
1da177e4 LT |
3850 | /** |
3851 | * init_sd - entry point for this driver (both when built in or when | |
3852 | * a module). | |
3853 | * | |
3854 | * Note: this function registers this driver with the scsi mid-level. | |
3855 | **/ | |
3856 | static int __init init_sd(void) | |
3857 | { | |
5e4009ba | 3858 | int majors = 0, i, err; |
1da177e4 LT |
3859 | |
3860 | SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n")); | |
3861 | ||
0761df9c | 3862 | for (i = 0; i < SD_MAJORS; i++) { |
996e509b | 3863 | if (__register_blkdev(sd_major(i), "sd", sd_default_probe)) |
0761df9c HR |
3864 | continue; |
3865 | majors++; | |
0761df9c | 3866 | } |
1da177e4 LT |
3867 | |
3868 | if (!majors) | |
3869 | return -ENODEV; | |
3870 | ||
5e4009ba JG |
3871 | err = class_register(&sd_disk_class); |
3872 | if (err) | |
3873 | goto err_out; | |
6bdaa1f1 | 3874 | |
4e7392ec MP |
3875 | sd_cdb_cache = kmem_cache_create("sd_ext_cdb", SD_EXT_CDB_SIZE, |
3876 | 0, 0, NULL); | |
3877 | if (!sd_cdb_cache) { | |
3878 | printk(KERN_ERR "sd: can't init extended cdb cache\n"); | |
8d964478 | 3879 | err = -ENOMEM; |
4e7392ec MP |
3880 | goto err_out_class; |
3881 | } | |
3882 | ||
3883 | sd_cdb_pool = mempool_create_slab_pool(SD_MEMPOOL_SIZE, sd_cdb_cache); | |
3884 | if (!sd_cdb_pool) { | |
3885 | printk(KERN_ERR "sd: can't init extended cdb pool\n"); | |
8d964478 | 3886 | err = -ENOMEM; |
4e7392ec MP |
3887 | goto err_out_cache; |
3888 | } | |
3889 | ||
61cce6f6 JA |
3890 | sd_page_pool = mempool_create_page_pool(SD_MEMPOOL_SIZE, 0); |
3891 | if (!sd_page_pool) { | |
3892 | printk(KERN_ERR "sd: can't init discard page pool\n"); | |
3893 | err = -ENOMEM; | |
3894 | goto err_out_ppool; | |
3895 | } | |
3896 | ||
afd5e34b JD |
3897 | err = scsi_register_driver(&sd_template.gendrv); |
3898 | if (err) | |
3899 | goto err_out_driver; | |
3900 | ||
5e4009ba JG |
3901 | return 0; |
3902 | ||
afd5e34b | 3903 | err_out_driver: |
61cce6f6 JA |
3904 | mempool_destroy(sd_page_pool); |
3905 | ||
3906 | err_out_ppool: | |
afd5e34b JD |
3907 | mempool_destroy(sd_cdb_pool); |
3908 | ||
4e7392ec MP |
3909 | err_out_cache: |
3910 | kmem_cache_destroy(sd_cdb_cache); | |
3911 | ||
5e4009ba JG |
3912 | err_out_class: |
3913 | class_unregister(&sd_disk_class); | |
3914 | err_out: | |
3915 | for (i = 0; i < SD_MAJORS; i++) | |
3916 | unregister_blkdev(sd_major(i), "sd"); | |
3917 | return err; | |
1da177e4 LT |
3918 | } |
3919 | ||
3920 | /** | |
3921 | * exit_sd - exit point for this driver (when it is a module). | |
3922 | * | |
3923 | * Note: this function unregisters this driver from the scsi mid-level. | |
3924 | **/ | |
3925 | static void __exit exit_sd(void) | |
3926 | { | |
3927 | int i; | |
3928 | ||
3929 | SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n")); | |
3930 | ||
afd5e34b | 3931 | scsi_unregister_driver(&sd_template.gendrv); |
4e7392ec | 3932 | mempool_destroy(sd_cdb_pool); |
61cce6f6 | 3933 | mempool_destroy(sd_page_pool); |
4e7392ec MP |
3934 | kmem_cache_destroy(sd_cdb_cache); |
3935 | ||
5e4009ba JG |
3936 | class_unregister(&sd_disk_class); |
3937 | ||
996e509b | 3938 | for (i = 0; i < SD_MAJORS; i++) |
1da177e4 LT |
3939 | unregister_blkdev(sd_major(i), "sd"); |
3940 | } | |
3941 | ||
1da177e4 LT |
3942 | module_init(init_sd); |
3943 | module_exit(exit_sd); | |
e73aec82 | 3944 | |
a35989a0 | 3945 | void sd_print_sense_hdr(struct scsi_disk *sdkp, struct scsi_sense_hdr *sshdr) |
e73aec82 | 3946 | { |
21045519 HR |
3947 | scsi_print_sense_hdr(sdkp->device, |
3948 | sdkp->disk ? sdkp->disk->disk_name : NULL, sshdr); | |
e73aec82 MP |
3949 | } |
3950 | ||
a35989a0 | 3951 | void sd_print_result(const struct scsi_disk *sdkp, const char *msg, int result) |
e73aec82 | 3952 | { |
ef61329d | 3953 | const char *hb_string = scsi_hostbyte_string(result); |
ef61329d | 3954 | |
54c29086 | 3955 | if (hb_string) |
ef61329d HR |
3956 | sd_printk(KERN_INFO, sdkp, |
3957 | "%s: Result: hostbyte=%s driverbyte=%s\n", msg, | |
3958 | hb_string ? hb_string : "invalid", | |
54c29086 | 3959 | "DRIVER_OK"); |
ef61329d HR |
3960 | else |
3961 | sd_printk(KERN_INFO, sdkp, | |
54c29086 HR |
3962 | "%s: Result: hostbyte=0x%02x driverbyte=%s\n", |
3963 | msg, host_byte(result), "DRIVER_OK"); | |
e73aec82 | 3964 | } |