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1da177e4 LT |
1 | /* |
2 | * sd.c Copyright (C) 1992 Drew Eckhardt | |
3 | * Copyright (C) 1993, 1994, 1995, 1999 Eric Youngdale | |
4 | * | |
5 | * Linux scsi disk driver | |
6 | * Initial versions: Drew Eckhardt | |
7 | * Subsequent revisions: Eric Youngdale | |
8 | * Modification history: | |
9 | * - Drew Eckhardt <drew@colorado.edu> original | |
10 | * - Eric Youngdale <eric@andante.org> add scatter-gather, multiple | |
11 | * outstanding request, and other enhancements. | |
12 | * Support loadable low-level scsi drivers. | |
13 | * - Jirka Hanika <geo@ff.cuni.cz> support more scsi disks using | |
14 | * eight major numbers. | |
15 | * - Richard Gooch <rgooch@atnf.csiro.au> support devfs. | |
16 | * - Torben Mathiasen <tmm@image.dk> Resource allocation fixes in | |
17 | * sd_init and cleanups. | |
18 | * - Alex Davis <letmein@erols.com> Fix problem where partition info | |
19 | * not being read in sd_open. Fix problem where removable media | |
20 | * could be ejected after sd_open. | |
21 | * - Douglas Gilbert <dgilbert@interlog.com> cleanup for lk 2.5.x | |
22 | * - Badari Pulavarty <pbadari@us.ibm.com>, Matthew Wilcox | |
23 | * <willy@debian.org>, Kurt Garloff <garloff@suse.de>: | |
24 | * Support 32k/1M disks. | |
25 | * | |
26 | * Logging policy (needs CONFIG_SCSI_LOGGING defined): | |
27 | * - setting up transfer: SCSI_LOG_HLQUEUE levels 1 and 2 | |
28 | * - end of transfer (bh + scsi_lib): SCSI_LOG_HLCOMPLETE level 1 | |
29 | * - entering sd_ioctl: SCSI_LOG_IOCTL level 1 | |
30 | * - entering other commands: SCSI_LOG_HLQUEUE level 3 | |
31 | * Note: when the logging level is set by the user, it must be greater | |
32 | * than the level indicated above to trigger output. | |
33 | */ | |
34 | ||
1da177e4 LT |
35 | #include <linux/module.h> |
36 | #include <linux/fs.h> | |
37 | #include <linux/kernel.h> | |
1da177e4 LT |
38 | #include <linux/mm.h> |
39 | #include <linux/bio.h> | |
40 | #include <linux/genhd.h> | |
41 | #include <linux/hdreg.h> | |
42 | #include <linux/errno.h> | |
43 | #include <linux/idr.h> | |
44 | #include <linux/interrupt.h> | |
45 | #include <linux/init.h> | |
46 | #include <linux/blkdev.h> | |
47 | #include <linux/blkpg.h> | |
1da177e4 | 48 | #include <linux/delay.h> |
0b950672 | 49 | #include <linux/mutex.h> |
7404ad3b | 50 | #include <linux/string_helpers.h> |
4ace92fc | 51 | #include <linux/async.h> |
5a0e3ad6 | 52 | #include <linux/slab.h> |
d80210f2 | 53 | #include <linux/sed-opal.h> |
54f57588 | 54 | #include <linux/pm_runtime.h> |
924d55b0 | 55 | #include <linux/pr.h> |
8475c811 | 56 | #include <linux/t10-pi.h> |
7c0f6ba6 | 57 | #include <linux/uaccess.h> |
8f76d151 | 58 | #include <asm/unaligned.h> |
1da177e4 LT |
59 | |
60 | #include <scsi/scsi.h> | |
61 | #include <scsi/scsi_cmnd.h> | |
62 | #include <scsi/scsi_dbg.h> | |
63 | #include <scsi/scsi_device.h> | |
64 | #include <scsi/scsi_driver.h> | |
65 | #include <scsi/scsi_eh.h> | |
66 | #include <scsi/scsi_host.h> | |
67 | #include <scsi/scsi_ioctl.h> | |
1da177e4 LT |
68 | #include <scsi/scsicam.h> |
69 | ||
aa91696e | 70 | #include "sd.h" |
a7a20d10 | 71 | #include "scsi_priv.h" |
1da177e4 LT |
72 | #include "scsi_logging.h" |
73 | ||
f018fa55 RH |
74 | MODULE_AUTHOR("Eric Youngdale"); |
75 | MODULE_DESCRIPTION("SCSI disk (sd) driver"); | |
76 | MODULE_LICENSE("GPL"); | |
77 | ||
78 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK0_MAJOR); | |
79 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK1_MAJOR); | |
80 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK2_MAJOR); | |
81 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK3_MAJOR); | |
82 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK4_MAJOR); | |
83 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK5_MAJOR); | |
84 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK6_MAJOR); | |
85 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK7_MAJOR); | |
86 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK8_MAJOR); | |
87 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK9_MAJOR); | |
88 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK10_MAJOR); | |
89 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK11_MAJOR); | |
90 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK12_MAJOR); | |
91 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK13_MAJOR); | |
92 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK14_MAJOR); | |
93 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK15_MAJOR); | |
d7b8bcb0 MT |
94 | MODULE_ALIAS_SCSI_DEVICE(TYPE_DISK); |
95 | MODULE_ALIAS_SCSI_DEVICE(TYPE_MOD); | |
96 | MODULE_ALIAS_SCSI_DEVICE(TYPE_RBC); | |
89d94756 | 97 | MODULE_ALIAS_SCSI_DEVICE(TYPE_ZBC); |
f018fa55 | 98 | |
870d6656 | 99 | #if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT) |
f615b48c | 100 | #define SD_MINORS 16 |
870d6656 | 101 | #else |
3e1a7ff8 | 102 | #define SD_MINORS 0 |
870d6656 TH |
103 | #endif |
104 | ||
c98a0eb0 | 105 | static void sd_config_discard(struct scsi_disk *, unsigned int); |
5db44863 | 106 | static void sd_config_write_same(struct scsi_disk *); |
7b3d9545 | 107 | static int sd_revalidate_disk(struct gendisk *); |
72ec24bd | 108 | static void sd_unlock_native_capacity(struct gendisk *disk); |
7b3d9545 LT |
109 | static int sd_probe(struct device *); |
110 | static int sd_remove(struct device *); | |
111 | static void sd_shutdown(struct device *); | |
95897910 ON |
112 | static int sd_suspend_system(struct device *); |
113 | static int sd_suspend_runtime(struct device *); | |
7b3d9545 LT |
114 | static int sd_resume(struct device *); |
115 | static void sd_rescan(struct device *); | |
a1b73fc1 CH |
116 | static int sd_init_command(struct scsi_cmnd *SCpnt); |
117 | static void sd_uninit_command(struct scsi_cmnd *SCpnt); | |
7b3d9545 | 118 | static int sd_done(struct scsi_cmnd *); |
7a38dc0b | 119 | static void sd_eh_reset(struct scsi_cmnd *); |
2451079b | 120 | static int sd_eh_action(struct scsi_cmnd *, int); |
7b3d9545 | 121 | static void sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer); |
ee959b00 | 122 | static void scsi_disk_release(struct device *cdev); |
7b3d9545 | 123 | static void sd_print_sense_hdr(struct scsi_disk *, struct scsi_sense_hdr *); |
ef61329d | 124 | static void sd_print_result(const struct scsi_disk *, const char *, int); |
7b3d9545 | 125 | |
4034cc68 | 126 | static DEFINE_SPINLOCK(sd_index_lock); |
f27bac27 | 127 | static DEFINE_IDA(sd_index_ida); |
1da177e4 LT |
128 | |
129 | /* This semaphore is used to mediate the 0->1 reference get in the | |
130 | * face of object destruction (i.e. we can't allow a get on an | |
131 | * object after last put) */ | |
0b950672 | 132 | static DEFINE_MUTEX(sd_ref_mutex); |
1da177e4 | 133 | |
439d77f7 HS |
134 | static struct kmem_cache *sd_cdb_cache; |
135 | static mempool_t *sd_cdb_pool; | |
1e76e375 | 136 | static mempool_t *sd_page_pool; |
4e7392ec | 137 | |
6bdaa1f1 JB |
138 | static const char *sd_cache_types[] = { |
139 | "write through", "none", "write back", | |
140 | "write back, no read (daft)" | |
141 | }; | |
142 | ||
cb2fb68d VC |
143 | static void sd_set_flush_flag(struct scsi_disk *sdkp) |
144 | { | |
eb310e23 | 145 | bool wc = false, fua = false; |
cb2fb68d VC |
146 | |
147 | if (sdkp->WCE) { | |
eb310e23 | 148 | wc = true; |
cb2fb68d | 149 | if (sdkp->DPOFUA) |
eb310e23 | 150 | fua = true; |
cb2fb68d VC |
151 | } |
152 | ||
eb310e23 | 153 | blk_queue_write_cache(sdkp->disk->queue, wc, fua); |
cb2fb68d VC |
154 | } |
155 | ||
ee959b00 | 156 | static ssize_t |
e1ea2351 GKH |
157 | cache_type_store(struct device *dev, struct device_attribute *attr, |
158 | const char *buf, size_t count) | |
6bdaa1f1 | 159 | { |
4c11712a | 160 | int ct, rcd, wce, sp; |
ee959b00 | 161 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
162 | struct scsi_device *sdp = sdkp->device; |
163 | char buffer[64]; | |
164 | char *buffer_data; | |
165 | struct scsi_mode_data data; | |
166 | struct scsi_sense_hdr sshdr; | |
2ee3e26c | 167 | static const char temp[] = "temporary "; |
6bdaa1f1 JB |
168 | int len; |
169 | ||
89d94756 | 170 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) |
6bdaa1f1 JB |
171 | /* no cache control on RBC devices; theoretically they |
172 | * can do it, but there's probably so many exceptions | |
173 | * it's not worth the risk */ | |
174 | return -EINVAL; | |
175 | ||
39c60a09 JB |
176 | if (strncmp(buf, temp, sizeof(temp) - 1) == 0) { |
177 | buf += sizeof(temp) - 1; | |
178 | sdkp->cache_override = 1; | |
179 | } else { | |
180 | sdkp->cache_override = 0; | |
181 | } | |
182 | ||
4c11712a | 183 | ct = sysfs_match_string(sd_cache_types, buf); |
6bdaa1f1 JB |
184 | if (ct < 0) |
185 | return -EINVAL; | |
4c11712a | 186 | |
6bdaa1f1 | 187 | rcd = ct & 0x01 ? 1 : 0; |
2eefd57b | 188 | wce = (ct & 0x02) && !sdkp->write_prot ? 1 : 0; |
39c60a09 JB |
189 | |
190 | if (sdkp->cache_override) { | |
191 | sdkp->WCE = wce; | |
192 | sdkp->RCD = rcd; | |
cb2fb68d | 193 | sd_set_flush_flag(sdkp); |
39c60a09 JB |
194 | return count; |
195 | } | |
196 | ||
6bdaa1f1 JB |
197 | if (scsi_mode_sense(sdp, 0x08, 8, buffer, sizeof(buffer), SD_TIMEOUT, |
198 | SD_MAX_RETRIES, &data, NULL)) | |
199 | return -EINVAL; | |
a9312fb8 | 200 | len = min_t(size_t, sizeof(buffer), data.length - data.header_length - |
6bdaa1f1 JB |
201 | data.block_descriptor_length); |
202 | buffer_data = buffer + data.header_length + | |
203 | data.block_descriptor_length; | |
204 | buffer_data[2] &= ~0x05; | |
205 | buffer_data[2] |= wce << 2 | rcd; | |
206 | sp = buffer_data[0] & 0x80 ? 1 : 0; | |
2c5d16d6 | 207 | buffer_data[0] &= ~0x80; |
6bdaa1f1 | 208 | |
a241adbc IM |
209 | /* |
210 | * Ensure WP, DPOFUA, and RESERVED fields are cleared in | |
211 | * received mode parameter buffer before doing MODE SELECT. | |
212 | */ | |
213 | data.device_specific = 0; | |
214 | ||
6bdaa1f1 JB |
215 | if (scsi_mode_select(sdp, 1, sp, 8, buffer_data, len, SD_TIMEOUT, |
216 | SD_MAX_RETRIES, &data, &sshdr)) { | |
217 | if (scsi_sense_valid(&sshdr)) | |
e73aec82 | 218 | sd_print_sense_hdr(sdkp, &sshdr); |
6bdaa1f1 JB |
219 | return -EINVAL; |
220 | } | |
f98a8cae | 221 | revalidate_disk(sdkp->disk); |
6bdaa1f1 JB |
222 | return count; |
223 | } | |
224 | ||
ee959b00 | 225 | static ssize_t |
e1ea2351 GKH |
226 | manage_start_stop_show(struct device *dev, struct device_attribute *attr, |
227 | char *buf) | |
228 | { | |
229 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
230 | struct scsi_device *sdp = sdkp->device; | |
231 | ||
4c11712a | 232 | return sprintf(buf, "%u\n", sdp->manage_start_stop); |
e1ea2351 GKH |
233 | } |
234 | ||
235 | static ssize_t | |
236 | manage_start_stop_store(struct device *dev, struct device_attribute *attr, | |
237 | const char *buf, size_t count) | |
c3c94c5a | 238 | { |
ee959b00 | 239 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
c3c94c5a | 240 | struct scsi_device *sdp = sdkp->device; |
623401ee | 241 | bool v; |
c3c94c5a TH |
242 | |
243 | if (!capable(CAP_SYS_ADMIN)) | |
244 | return -EACCES; | |
245 | ||
623401ee | 246 | if (kstrtobool(buf, &v)) |
247 | return -EINVAL; | |
248 | ||
249 | sdp->manage_start_stop = v; | |
c3c94c5a TH |
250 | |
251 | return count; | |
252 | } | |
e1ea2351 | 253 | static DEVICE_ATTR_RW(manage_start_stop); |
c3c94c5a | 254 | |
ee959b00 | 255 | static ssize_t |
e1ea2351 GKH |
256 | allow_restart_show(struct device *dev, struct device_attribute *attr, char *buf) |
257 | { | |
258 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
259 | ||
4c11712a | 260 | return sprintf(buf, "%u\n", sdkp->device->allow_restart); |
e1ea2351 GKH |
261 | } |
262 | ||
263 | static ssize_t | |
264 | allow_restart_store(struct device *dev, struct device_attribute *attr, | |
265 | const char *buf, size_t count) | |
a144c5ae | 266 | { |
658e9a6d | 267 | bool v; |
ee959b00 | 268 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
a144c5ae BK |
269 | struct scsi_device *sdp = sdkp->device; |
270 | ||
271 | if (!capable(CAP_SYS_ADMIN)) | |
272 | return -EACCES; | |
273 | ||
89d94756 | 274 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) |
a144c5ae BK |
275 | return -EINVAL; |
276 | ||
658e9a6d | 277 | if (kstrtobool(buf, &v)) |
278 | return -EINVAL; | |
279 | ||
280 | sdp->allow_restart = v; | |
a144c5ae BK |
281 | |
282 | return count; | |
283 | } | |
e1ea2351 | 284 | static DEVICE_ATTR_RW(allow_restart); |
a144c5ae | 285 | |
ee959b00 | 286 | static ssize_t |
e1ea2351 | 287 | cache_type_show(struct device *dev, struct device_attribute *attr, char *buf) |
6bdaa1f1 | 288 | { |
ee959b00 | 289 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
290 | int ct = sdkp->RCD + 2*sdkp->WCE; |
291 | ||
4c11712a | 292 | return sprintf(buf, "%s\n", sd_cache_types[ct]); |
6bdaa1f1 | 293 | } |
e1ea2351 | 294 | static DEVICE_ATTR_RW(cache_type); |
6bdaa1f1 | 295 | |
ee959b00 | 296 | static ssize_t |
e1ea2351 | 297 | FUA_show(struct device *dev, struct device_attribute *attr, char *buf) |
6bdaa1f1 | 298 | { |
ee959b00 | 299 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 | 300 | |
4c11712a | 301 | return sprintf(buf, "%u\n", sdkp->DPOFUA); |
6bdaa1f1 | 302 | } |
e1ea2351 | 303 | static DEVICE_ATTR_RO(FUA); |
6bdaa1f1 | 304 | |
ee959b00 | 305 | static ssize_t |
e1ea2351 GKH |
306 | protection_type_show(struct device *dev, struct device_attribute *attr, |
307 | char *buf) | |
e0597d70 MP |
308 | { |
309 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
310 | ||
4c11712a | 311 | return sprintf(buf, "%u\n", sdkp->protection_type); |
e0597d70 MP |
312 | } |
313 | ||
8172499a | 314 | static ssize_t |
e1ea2351 GKH |
315 | protection_type_store(struct device *dev, struct device_attribute *attr, |
316 | const char *buf, size_t count) | |
8172499a MP |
317 | { |
318 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
319 | unsigned int val; | |
320 | int err; | |
321 | ||
322 | if (!capable(CAP_SYS_ADMIN)) | |
323 | return -EACCES; | |
324 | ||
325 | err = kstrtouint(buf, 10, &val); | |
326 | ||
327 | if (err) | |
328 | return err; | |
329 | ||
830cc351 | 330 | if (val <= T10_PI_TYPE3_PROTECTION) |
8172499a MP |
331 | sdkp->protection_type = val; |
332 | ||
333 | return count; | |
334 | } | |
e1ea2351 | 335 | static DEVICE_ATTR_RW(protection_type); |
8172499a | 336 | |
518fa8e3 | 337 | static ssize_t |
e1ea2351 GKH |
338 | protection_mode_show(struct device *dev, struct device_attribute *attr, |
339 | char *buf) | |
518fa8e3 MP |
340 | { |
341 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
342 | struct scsi_device *sdp = sdkp->device; | |
343 | unsigned int dif, dix; | |
344 | ||
345 | dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type); | |
346 | dix = scsi_host_dix_capable(sdp->host, sdkp->protection_type); | |
347 | ||
8475c811 | 348 | if (!dix && scsi_host_dix_capable(sdp->host, T10_PI_TYPE0_PROTECTION)) { |
518fa8e3 MP |
349 | dif = 0; |
350 | dix = 1; | |
351 | } | |
352 | ||
353 | if (!dif && !dix) | |
4c11712a | 354 | return sprintf(buf, "none\n"); |
518fa8e3 | 355 | |
4c11712a | 356 | return sprintf(buf, "%s%u\n", dix ? "dix" : "dif", dif); |
518fa8e3 | 357 | } |
e1ea2351 | 358 | static DEVICE_ATTR_RO(protection_mode); |
518fa8e3 | 359 | |
e0597d70 | 360 | static ssize_t |
e1ea2351 | 361 | app_tag_own_show(struct device *dev, struct device_attribute *attr, char *buf) |
e0597d70 MP |
362 | { |
363 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
364 | ||
4c11712a | 365 | return sprintf(buf, "%u\n", sdkp->ATO); |
e0597d70 | 366 | } |
e1ea2351 | 367 | static DEVICE_ATTR_RO(app_tag_own); |
e0597d70 | 368 | |
e339c1a7 | 369 | static ssize_t |
e1ea2351 GKH |
370 | thin_provisioning_show(struct device *dev, struct device_attribute *attr, |
371 | char *buf) | |
e339c1a7 MP |
372 | { |
373 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
374 | ||
4c11712a | 375 | return sprintf(buf, "%u\n", sdkp->lbpme); |
c98a0eb0 | 376 | } |
e1ea2351 | 377 | static DEVICE_ATTR_RO(thin_provisioning); |
c98a0eb0 | 378 | |
4c11712a | 379 | /* sysfs_match_string() requires dense arrays */ |
c98a0eb0 MP |
380 | static const char *lbp_mode[] = { |
381 | [SD_LBP_FULL] = "full", | |
382 | [SD_LBP_UNMAP] = "unmap", | |
383 | [SD_LBP_WS16] = "writesame_16", | |
384 | [SD_LBP_WS10] = "writesame_10", | |
385 | [SD_LBP_ZERO] = "writesame_zero", | |
386 | [SD_LBP_DISABLE] = "disabled", | |
387 | }; | |
388 | ||
389 | static ssize_t | |
e1ea2351 GKH |
390 | provisioning_mode_show(struct device *dev, struct device_attribute *attr, |
391 | char *buf) | |
c98a0eb0 MP |
392 | { |
393 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
394 | ||
4c11712a | 395 | return sprintf(buf, "%s\n", lbp_mode[sdkp->provisioning_mode]); |
c98a0eb0 MP |
396 | } |
397 | ||
398 | static ssize_t | |
e1ea2351 GKH |
399 | provisioning_mode_store(struct device *dev, struct device_attribute *attr, |
400 | const char *buf, size_t count) | |
c98a0eb0 MP |
401 | { |
402 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
403 | struct scsi_device *sdp = sdkp->device; | |
4c11712a | 404 | int mode; |
c98a0eb0 MP |
405 | |
406 | if (!capable(CAP_SYS_ADMIN)) | |
407 | return -EACCES; | |
408 | ||
89d94756 HR |
409 | if (sd_is_zoned(sdkp)) { |
410 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
411 | return count; | |
412 | } | |
413 | ||
c98a0eb0 MP |
414 | if (sdp->type != TYPE_DISK) |
415 | return -EINVAL; | |
416 | ||
4c11712a MP |
417 | mode = sysfs_match_string(lbp_mode, buf); |
418 | if (mode < 0) | |
c98a0eb0 MP |
419 | return -EINVAL; |
420 | ||
4c11712a MP |
421 | sd_config_discard(sdkp, mode); |
422 | ||
c98a0eb0 | 423 | return count; |
e339c1a7 | 424 | } |
e1ea2351 | 425 | static DEVICE_ATTR_RW(provisioning_mode); |
e339c1a7 | 426 | |
4c11712a | 427 | /* sysfs_match_string() requires dense arrays */ |
e6bd9312 MP |
428 | static const char *zeroing_mode[] = { |
429 | [SD_ZERO_WRITE] = "write", | |
430 | [SD_ZERO_WS] = "writesame", | |
431 | [SD_ZERO_WS16_UNMAP] = "writesame_16_unmap", | |
432 | [SD_ZERO_WS10_UNMAP] = "writesame_10_unmap", | |
433 | }; | |
434 | ||
435 | static ssize_t | |
436 | zeroing_mode_show(struct device *dev, struct device_attribute *attr, | |
437 | char *buf) | |
438 | { | |
439 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
440 | ||
4c11712a | 441 | return sprintf(buf, "%s\n", zeroing_mode[sdkp->zeroing_mode]); |
e6bd9312 MP |
442 | } |
443 | ||
444 | static ssize_t | |
445 | zeroing_mode_store(struct device *dev, struct device_attribute *attr, | |
446 | const char *buf, size_t count) | |
447 | { | |
448 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
4c11712a | 449 | int mode; |
e6bd9312 MP |
450 | |
451 | if (!capable(CAP_SYS_ADMIN)) | |
452 | return -EACCES; | |
453 | ||
4c11712a MP |
454 | mode = sysfs_match_string(zeroing_mode, buf); |
455 | if (mode < 0) | |
e6bd9312 MP |
456 | return -EINVAL; |
457 | ||
4c11712a MP |
458 | sdkp->zeroing_mode = mode; |
459 | ||
e6bd9312 MP |
460 | return count; |
461 | } | |
462 | static DEVICE_ATTR_RW(zeroing_mode); | |
463 | ||
18a4d0a2 | 464 | static ssize_t |
e1ea2351 GKH |
465 | max_medium_access_timeouts_show(struct device *dev, |
466 | struct device_attribute *attr, char *buf) | |
18a4d0a2 MP |
467 | { |
468 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
469 | ||
4c11712a | 470 | return sprintf(buf, "%u\n", sdkp->max_medium_access_timeouts); |
18a4d0a2 MP |
471 | } |
472 | ||
473 | static ssize_t | |
e1ea2351 GKH |
474 | max_medium_access_timeouts_store(struct device *dev, |
475 | struct device_attribute *attr, const char *buf, | |
476 | size_t count) | |
18a4d0a2 MP |
477 | { |
478 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
479 | int err; | |
480 | ||
481 | if (!capable(CAP_SYS_ADMIN)) | |
482 | return -EACCES; | |
483 | ||
484 | err = kstrtouint(buf, 10, &sdkp->max_medium_access_timeouts); | |
485 | ||
486 | return err ? err : count; | |
487 | } | |
e1ea2351 | 488 | static DEVICE_ATTR_RW(max_medium_access_timeouts); |
18a4d0a2 | 489 | |
5db44863 | 490 | static ssize_t |
e1ea2351 GKH |
491 | max_write_same_blocks_show(struct device *dev, struct device_attribute *attr, |
492 | char *buf) | |
5db44863 MP |
493 | { |
494 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
495 | ||
4c11712a | 496 | return sprintf(buf, "%u\n", sdkp->max_ws_blocks); |
5db44863 MP |
497 | } |
498 | ||
499 | static ssize_t | |
e1ea2351 GKH |
500 | max_write_same_blocks_store(struct device *dev, struct device_attribute *attr, |
501 | const char *buf, size_t count) | |
5db44863 MP |
502 | { |
503 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
504 | struct scsi_device *sdp = sdkp->device; | |
505 | unsigned long max; | |
506 | int err; | |
507 | ||
508 | if (!capable(CAP_SYS_ADMIN)) | |
509 | return -EACCES; | |
510 | ||
89d94756 | 511 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) |
5db44863 MP |
512 | return -EINVAL; |
513 | ||
514 | err = kstrtoul(buf, 10, &max); | |
515 | ||
516 | if (err) | |
517 | return err; | |
518 | ||
519 | if (max == 0) | |
520 | sdp->no_write_same = 1; | |
66c28f97 MP |
521 | else if (max <= SD_MAX_WS16_BLOCKS) { |
522 | sdp->no_write_same = 0; | |
5db44863 | 523 | sdkp->max_ws_blocks = max; |
66c28f97 | 524 | } |
5db44863 MP |
525 | |
526 | sd_config_write_same(sdkp); | |
527 | ||
528 | return count; | |
529 | } | |
e1ea2351 GKH |
530 | static DEVICE_ATTR_RW(max_write_same_blocks); |
531 | ||
532 | static struct attribute *sd_disk_attrs[] = { | |
533 | &dev_attr_cache_type.attr, | |
534 | &dev_attr_FUA.attr, | |
535 | &dev_attr_allow_restart.attr, | |
536 | &dev_attr_manage_start_stop.attr, | |
537 | &dev_attr_protection_type.attr, | |
538 | &dev_attr_protection_mode.attr, | |
539 | &dev_attr_app_tag_own.attr, | |
540 | &dev_attr_thin_provisioning.attr, | |
541 | &dev_attr_provisioning_mode.attr, | |
e6bd9312 | 542 | &dev_attr_zeroing_mode.attr, |
e1ea2351 GKH |
543 | &dev_attr_max_write_same_blocks.attr, |
544 | &dev_attr_max_medium_access_timeouts.attr, | |
545 | NULL, | |
6bdaa1f1 | 546 | }; |
e1ea2351 | 547 | ATTRIBUTE_GROUPS(sd_disk); |
6bdaa1f1 JB |
548 | |
549 | static struct class sd_disk_class = { | |
550 | .name = "scsi_disk", | |
551 | .owner = THIS_MODULE, | |
ee959b00 | 552 | .dev_release = scsi_disk_release, |
e1ea2351 | 553 | .dev_groups = sd_disk_groups, |
6bdaa1f1 | 554 | }; |
1da177e4 | 555 | |
691e3d31 | 556 | static const struct dev_pm_ops sd_pm_ops = { |
95897910 | 557 | .suspend = sd_suspend_system, |
691e3d31 | 558 | .resume = sd_resume, |
95897910 | 559 | .poweroff = sd_suspend_system, |
691e3d31 | 560 | .restore = sd_resume, |
95897910 | 561 | .runtime_suspend = sd_suspend_runtime, |
691e3d31 AL |
562 | .runtime_resume = sd_resume, |
563 | }; | |
564 | ||
1da177e4 | 565 | static struct scsi_driver sd_template = { |
1da177e4 LT |
566 | .gendrv = { |
567 | .name = "sd", | |
3af6b352 | 568 | .owner = THIS_MODULE, |
1da177e4 LT |
569 | .probe = sd_probe, |
570 | .remove = sd_remove, | |
571 | .shutdown = sd_shutdown, | |
691e3d31 | 572 | .pm = &sd_pm_ops, |
1da177e4 LT |
573 | }, |
574 | .rescan = sd_rescan, | |
a1b73fc1 CH |
575 | .init_command = sd_init_command, |
576 | .uninit_command = sd_uninit_command, | |
7b3d9545 | 577 | .done = sd_done, |
18a4d0a2 | 578 | .eh_action = sd_eh_action, |
7a38dc0b | 579 | .eh_reset = sd_eh_reset, |
1da177e4 LT |
580 | }; |
581 | ||
0761df9c HR |
582 | /* |
583 | * Dummy kobj_map->probe function. | |
584 | * The default ->probe function will call modprobe, which is | |
585 | * pointless as this module is already loaded. | |
586 | */ | |
587 | static struct kobject *sd_default_probe(dev_t devt, int *partno, void *data) | |
588 | { | |
589 | return NULL; | |
590 | } | |
591 | ||
1da177e4 LT |
592 | /* |
593 | * Device no to disk mapping: | |
594 | * | |
595 | * major disc2 disc p1 | |
596 | * |............|.............|....|....| <- dev_t | |
597 | * 31 20 19 8 7 4 3 0 | |
598 | * | |
599 | * Inside a major, we have 16k disks, however mapped non- | |
600 | * contiguously. The first 16 disks are for major0, the next | |
601 | * ones with major1, ... Disk 256 is for major0 again, disk 272 | |
602 | * for major1, ... | |
603 | * As we stay compatible with our numbering scheme, we can reuse | |
604 | * the well-know SCSI majors 8, 65--71, 136--143. | |
605 | */ | |
606 | static int sd_major(int major_idx) | |
607 | { | |
608 | switch (major_idx) { | |
609 | case 0: | |
610 | return SCSI_DISK0_MAJOR; | |
611 | case 1 ... 7: | |
612 | return SCSI_DISK1_MAJOR + major_idx - 1; | |
613 | case 8 ... 15: | |
614 | return SCSI_DISK8_MAJOR + major_idx - 8; | |
615 | default: | |
616 | BUG(); | |
617 | return 0; /* shut up gcc */ | |
618 | } | |
619 | } | |
620 | ||
3d9a1f53 | 621 | static struct scsi_disk *scsi_disk_get(struct gendisk *disk) |
1da177e4 LT |
622 | { |
623 | struct scsi_disk *sdkp = NULL; | |
624 | ||
3d9a1f53 CH |
625 | mutex_lock(&sd_ref_mutex); |
626 | ||
39b7f1e2 AS |
627 | if (disk->private_data) { |
628 | sdkp = scsi_disk(disk); | |
629 | if (scsi_device_get(sdkp->device) == 0) | |
ee959b00 | 630 | get_device(&sdkp->dev); |
39b7f1e2 AS |
631 | else |
632 | sdkp = NULL; | |
633 | } | |
0b950672 | 634 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
635 | return sdkp; |
636 | } | |
637 | ||
638 | static void scsi_disk_put(struct scsi_disk *sdkp) | |
639 | { | |
640 | struct scsi_device *sdev = sdkp->device; | |
641 | ||
0b950672 | 642 | mutex_lock(&sd_ref_mutex); |
ee959b00 | 643 | put_device(&sdkp->dev); |
1da177e4 | 644 | scsi_device_put(sdev); |
0b950672 | 645 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
646 | } |
647 | ||
d80210f2 CH |
648 | #ifdef CONFIG_BLK_SED_OPAL |
649 | static int sd_sec_submit(void *data, u16 spsp, u8 secp, void *buffer, | |
650 | size_t len, bool send) | |
651 | { | |
652 | struct scsi_device *sdev = data; | |
653 | u8 cdb[12] = { 0, }; | |
654 | int ret; | |
655 | ||
656 | cdb[0] = send ? SECURITY_PROTOCOL_OUT : SECURITY_PROTOCOL_IN; | |
657 | cdb[1] = secp; | |
658 | put_unaligned_be16(spsp, &cdb[2]); | |
659 | put_unaligned_be32(len, &cdb[6]); | |
660 | ||
661 | ret = scsi_execute_req(sdev, cdb, | |
662 | send ? DMA_TO_DEVICE : DMA_FROM_DEVICE, | |
663 | buffer, len, NULL, SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
664 | return ret <= 0 ? ret : -EIO; | |
665 | } | |
666 | #endif /* CONFIG_BLK_SED_OPAL */ | |
667 | ||
c611529e MP |
668 | static unsigned char sd_setup_protect_cmnd(struct scsi_cmnd *scmd, |
669 | unsigned int dix, unsigned int dif) | |
35e1a5d9 | 670 | { |
c611529e MP |
671 | struct bio *bio = scmd->request->bio; |
672 | unsigned int prot_op = sd_prot_op(rq_data_dir(scmd->request), dix, dif); | |
673 | unsigned int protect = 0; | |
674 | ||
675 | if (dix) { /* DIX Type 0, 1, 2, 3 */ | |
676 | if (bio_integrity_flagged(bio, BIP_IP_CHECKSUM)) | |
677 | scmd->prot_flags |= SCSI_PROT_IP_CHECKSUM; | |
678 | ||
679 | if (bio_integrity_flagged(bio, BIP_CTRL_NOCHECK) == false) | |
680 | scmd->prot_flags |= SCSI_PROT_GUARD_CHECK; | |
681 | } | |
682 | ||
8475c811 | 683 | if (dif != T10_PI_TYPE3_PROTECTION) { /* DIX/DIF Type 0, 1, 2 */ |
c611529e MP |
684 | scmd->prot_flags |= SCSI_PROT_REF_INCREMENT; |
685 | ||
686 | if (bio_integrity_flagged(bio, BIP_CTRL_NOCHECK) == false) | |
687 | scmd->prot_flags |= SCSI_PROT_REF_CHECK; | |
688 | } | |
689 | ||
690 | if (dif) { /* DIX/DIF Type 1, 2, 3 */ | |
691 | scmd->prot_flags |= SCSI_PROT_TRANSFER_PI; | |
692 | ||
693 | if (bio_integrity_flagged(bio, BIP_DISK_NOCHECK)) | |
694 | protect = 3 << 5; /* Disable target PI checking */ | |
695 | else | |
696 | protect = 1 << 5; /* Enable target PI checking */ | |
35e1a5d9 MP |
697 | } |
698 | ||
699 | scsi_set_prot_op(scmd, prot_op); | |
700 | scsi_set_prot_type(scmd, dif); | |
c611529e MP |
701 | scmd->prot_flags &= sd_prot_flag_mask(prot_op); |
702 | ||
703 | return protect; | |
35e1a5d9 MP |
704 | } |
705 | ||
c98a0eb0 MP |
706 | static void sd_config_discard(struct scsi_disk *sdkp, unsigned int mode) |
707 | { | |
708 | struct request_queue *q = sdkp->disk->queue; | |
709 | unsigned int logical_block_size = sdkp->device->sector_size; | |
710 | unsigned int max_blocks = 0; | |
711 | ||
bcd069bb MP |
712 | q->limits.discard_alignment = |
713 | sdkp->unmap_alignment * logical_block_size; | |
714 | q->limits.discard_granularity = | |
715 | max(sdkp->physical_block_size, | |
716 | sdkp->unmap_granularity * logical_block_size); | |
89730393 MP |
717 | sdkp->provisioning_mode = mode; |
718 | ||
c98a0eb0 MP |
719 | switch (mode) { |
720 | ||
4c11712a | 721 | case SD_LBP_FULL: |
c98a0eb0 | 722 | case SD_LBP_DISABLE: |
2bb4cd5c | 723 | blk_queue_max_discard_sectors(q, 0); |
c98a0eb0 MP |
724 | queue_flag_clear_unlocked(QUEUE_FLAG_DISCARD, q); |
725 | return; | |
726 | ||
727 | case SD_LBP_UNMAP: | |
5db44863 MP |
728 | max_blocks = min_not_zero(sdkp->max_unmap_blocks, |
729 | (u32)SD_MAX_WS16_BLOCKS); | |
c98a0eb0 MP |
730 | break; |
731 | ||
732 | case SD_LBP_WS16: | |
28a0bc41 MP |
733 | if (sdkp->device->unmap_limit_for_ws) |
734 | max_blocks = sdkp->max_unmap_blocks; | |
735 | else | |
736 | max_blocks = sdkp->max_ws_blocks; | |
737 | ||
738 | max_blocks = min_not_zero(max_blocks, (u32)SD_MAX_WS16_BLOCKS); | |
c98a0eb0 MP |
739 | break; |
740 | ||
741 | case SD_LBP_WS10: | |
28a0bc41 MP |
742 | if (sdkp->device->unmap_limit_for_ws) |
743 | max_blocks = sdkp->max_unmap_blocks; | |
744 | else | |
745 | max_blocks = sdkp->max_ws_blocks; | |
746 | ||
747 | max_blocks = min_not_zero(max_blocks, (u32)SD_MAX_WS10_BLOCKS); | |
c98a0eb0 MP |
748 | break; |
749 | ||
750 | case SD_LBP_ZERO: | |
5db44863 MP |
751 | max_blocks = min_not_zero(sdkp->max_ws_blocks, |
752 | (u32)SD_MAX_WS10_BLOCKS); | |
c98a0eb0 MP |
753 | break; |
754 | } | |
755 | ||
2bb4cd5c | 756 | blk_queue_max_discard_sectors(q, max_blocks * (logical_block_size >> 9)); |
c98a0eb0 | 757 | queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, q); |
c98a0eb0 MP |
758 | } |
759 | ||
81d926e8 | 760 | static int sd_setup_unmap_cmnd(struct scsi_cmnd *cmd) |
e339c1a7 | 761 | { |
6a7b4398 | 762 | struct scsi_device *sdp = cmd->device; |
81d926e8 CH |
763 | struct request *rq = cmd->request; |
764 | u64 sector = blk_rq_pos(rq) >> (ilog2(sdp->sector_size) - 9); | |
765 | u32 nr_sectors = blk_rq_sectors(rq) >> (ilog2(sdp->sector_size) - 9); | |
766 | unsigned int data_len = 24; | |
c98a0eb0 | 767 | char *buf; |
e339c1a7 | 768 | |
1e76e375 | 769 | rq->special_vec.bv_page = mempool_alloc(sd_page_pool, GFP_ATOMIC); |
81d926e8 | 770 | if (!rq->special_vec.bv_page) |
66ac0280 | 771 | return BLKPREP_DEFER; |
1e76e375 | 772 | clear_highpage(rq->special_vec.bv_page); |
81d926e8 CH |
773 | rq->special_vec.bv_offset = 0; |
774 | rq->special_vec.bv_len = data_len; | |
775 | rq->rq_flags |= RQF_SPECIAL_PAYLOAD; | |
66ac0280 | 776 | |
81d926e8 CH |
777 | cmd->cmd_len = 10; |
778 | cmd->cmnd[0] = UNMAP; | |
779 | cmd->cmnd[8] = 24; | |
e339c1a7 | 780 | |
81d926e8 CH |
781 | buf = page_address(rq->special_vec.bv_page); |
782 | put_unaligned_be16(6 + 16, &buf[0]); | |
783 | put_unaligned_be16(16, &buf[2]); | |
784 | put_unaligned_be64(sector, &buf[8]); | |
785 | put_unaligned_be32(nr_sectors, &buf[16]); | |
e339c1a7 | 786 | |
81d926e8 CH |
787 | cmd->allowed = SD_MAX_RETRIES; |
788 | cmd->transfersize = data_len; | |
789 | rq->timeout = SD_TIMEOUT; | |
790 | scsi_req(rq)->resid_len = data_len; | |
e339c1a7 | 791 | |
81d926e8 CH |
792 | return scsi_init_io(cmd); |
793 | } | |
c98a0eb0 | 794 | |
02d26103 | 795 | static int sd_setup_write_same16_cmnd(struct scsi_cmnd *cmd, bool unmap) |
81d926e8 CH |
796 | { |
797 | struct scsi_device *sdp = cmd->device; | |
798 | struct request *rq = cmd->request; | |
799 | u64 sector = blk_rq_pos(rq) >> (ilog2(sdp->sector_size) - 9); | |
800 | u32 nr_sectors = blk_rq_sectors(rq) >> (ilog2(sdp->sector_size) - 9); | |
801 | u32 data_len = sdp->sector_size; | |
c98a0eb0 | 802 | |
1e76e375 | 803 | rq->special_vec.bv_page = mempool_alloc(sd_page_pool, GFP_ATOMIC); |
81d926e8 CH |
804 | if (!rq->special_vec.bv_page) |
805 | return BLKPREP_DEFER; | |
1e76e375 | 806 | clear_highpage(rq->special_vec.bv_page); |
81d926e8 CH |
807 | rq->special_vec.bv_offset = 0; |
808 | rq->special_vec.bv_len = data_len; | |
809 | rq->rq_flags |= RQF_SPECIAL_PAYLOAD; | |
c98a0eb0 | 810 | |
81d926e8 CH |
811 | cmd->cmd_len = 16; |
812 | cmd->cmnd[0] = WRITE_SAME_16; | |
02d26103 | 813 | if (unmap) |
6a7b4398 | 814 | cmd->cmnd[1] = 0x8; /* UNMAP */ |
81d926e8 CH |
815 | put_unaligned_be64(sector, &cmd->cmnd[2]); |
816 | put_unaligned_be32(nr_sectors, &cmd->cmnd[10]); | |
66ac0280 | 817 | |
81d926e8 CH |
818 | cmd->allowed = SD_MAX_RETRIES; |
819 | cmd->transfersize = data_len; | |
02d26103 | 820 | rq->timeout = unmap ? SD_TIMEOUT : SD_WRITE_SAME_TIMEOUT; |
81d926e8 | 821 | scsi_req(rq)->resid_len = data_len; |
c98a0eb0 | 822 | |
81d926e8 CH |
823 | return scsi_init_io(cmd); |
824 | } | |
c98a0eb0 | 825 | |
81d926e8 CH |
826 | static int sd_setup_write_same10_cmnd(struct scsi_cmnd *cmd, bool unmap) |
827 | { | |
828 | struct scsi_device *sdp = cmd->device; | |
829 | struct request *rq = cmd->request; | |
830 | u64 sector = blk_rq_pos(rq) >> (ilog2(sdp->sector_size) - 9); | |
831 | u32 nr_sectors = blk_rq_sectors(rq) >> (ilog2(sdp->sector_size) - 9); | |
832 | u32 data_len = sdp->sector_size; | |
c98a0eb0 | 833 | |
1e76e375 | 834 | rq->special_vec.bv_page = mempool_alloc(sd_page_pool, GFP_ATOMIC); |
81d926e8 CH |
835 | if (!rq->special_vec.bv_page) |
836 | return BLKPREP_DEFER; | |
1e76e375 | 837 | clear_highpage(rq->special_vec.bv_page); |
81d926e8 CH |
838 | rq->special_vec.bv_offset = 0; |
839 | rq->special_vec.bv_len = data_len; | |
f9d03f96 | 840 | rq->rq_flags |= RQF_SPECIAL_PAYLOAD; |
e339c1a7 | 841 | |
81d926e8 CH |
842 | cmd->cmd_len = 10; |
843 | cmd->cmnd[0] = WRITE_SAME; | |
844 | if (unmap) | |
845 | cmd->cmnd[1] = 0x8; /* UNMAP */ | |
846 | put_unaligned_be32(sector, &cmd->cmnd[2]); | |
847 | put_unaligned_be16(nr_sectors, &cmd->cmnd[7]); | |
6a7b4398 | 848 | |
e4200f8e | 849 | cmd->allowed = SD_MAX_RETRIES; |
81d926e8 | 850 | cmd->transfersize = data_len; |
02d26103 | 851 | rq->timeout = unmap ? SD_TIMEOUT : SD_WRITE_SAME_TIMEOUT; |
81d926e8 | 852 | scsi_req(rq)->resid_len = data_len; |
6a7b4398 | 853 | |
81d926e8 | 854 | return scsi_init_io(cmd); |
f1126e95 | 855 | } |
f9d03f96 | 856 | |
02d26103 CH |
857 | static int sd_setup_write_zeroes_cmnd(struct scsi_cmnd *cmd) |
858 | { | |
859 | struct request *rq = cmd->request; | |
860 | struct scsi_device *sdp = cmd->device; | |
861 | struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); | |
862 | u64 sector = blk_rq_pos(rq) >> (ilog2(sdp->sector_size) - 9); | |
863 | u32 nr_sectors = blk_rq_sectors(rq) >> (ilog2(sdp->sector_size) - 9); | |
ed44fd7f | 864 | int ret; |
02d26103 | 865 | |
e4b87837 | 866 | if (!(rq->cmd_flags & REQ_NOUNMAP)) { |
e6bd9312 MP |
867 | switch (sdkp->zeroing_mode) { |
868 | case SD_ZERO_WS16_UNMAP: | |
ed44fd7f DLM |
869 | ret = sd_setup_write_same16_cmnd(cmd, true); |
870 | goto out; | |
e6bd9312 | 871 | case SD_ZERO_WS10_UNMAP: |
ed44fd7f DLM |
872 | ret = sd_setup_write_same10_cmnd(cmd, true); |
873 | goto out; | |
e4b87837 CH |
874 | } |
875 | } | |
c98a0eb0 | 876 | |
02d26103 CH |
877 | if (sdp->no_write_same) |
878 | return BLKPREP_INVALID; | |
ed44fd7f | 879 | |
02d26103 | 880 | if (sdkp->ws16 || sector > 0xffffffff || nr_sectors > 0xffff) |
ed44fd7f DLM |
881 | ret = sd_setup_write_same16_cmnd(cmd, false); |
882 | else | |
883 | ret = sd_setup_write_same10_cmnd(cmd, false); | |
884 | ||
885 | out: | |
886 | if (sd_is_zoned(sdkp) && ret == BLKPREP_OK) | |
887 | return sd_zbc_write_lock_zone(cmd); | |
888 | ||
889 | return ret; | |
f1126e95 FT |
890 | } |
891 | ||
5db44863 MP |
892 | static void sd_config_write_same(struct scsi_disk *sdkp) |
893 | { | |
894 | struct request_queue *q = sdkp->disk->queue; | |
895 | unsigned int logical_block_size = sdkp->device->sector_size; | |
5db44863 MP |
896 | |
897 | if (sdkp->device->no_write_same) { | |
898 | sdkp->max_ws_blocks = 0; | |
899 | goto out; | |
900 | } | |
901 | ||
902 | /* Some devices can not handle block counts above 0xffff despite | |
903 | * supporting WRITE SAME(16). Consequently we default to 64k | |
904 | * blocks per I/O unless the device explicitly advertises a | |
905 | * bigger limit. | |
906 | */ | |
66c28f97 MP |
907 | if (sdkp->max_ws_blocks > SD_MAX_WS10_BLOCKS) |
908 | sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks, | |
909 | (u32)SD_MAX_WS16_BLOCKS); | |
910 | else if (sdkp->ws16 || sdkp->ws10 || sdkp->device->no_report_opcodes) | |
911 | sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks, | |
912 | (u32)SD_MAX_WS10_BLOCKS); | |
913 | else { | |
914 | sdkp->device->no_write_same = 1; | |
915 | sdkp->max_ws_blocks = 0; | |
916 | } | |
5db44863 | 917 | |
e6bd9312 MP |
918 | if (sdkp->lbprz && sdkp->lbpws) |
919 | sdkp->zeroing_mode = SD_ZERO_WS16_UNMAP; | |
920 | else if (sdkp->lbprz && sdkp->lbpws10) | |
921 | sdkp->zeroing_mode = SD_ZERO_WS10_UNMAP; | |
922 | else if (sdkp->max_ws_blocks) | |
923 | sdkp->zeroing_mode = SD_ZERO_WS; | |
924 | else | |
925 | sdkp->zeroing_mode = SD_ZERO_WRITE; | |
926 | ||
b7af62a9 DLM |
927 | if (sdkp->max_ws_blocks && |
928 | sdkp->physical_block_size > logical_block_size) { | |
929 | /* | |
930 | * Reporting a maximum number of blocks that is not aligned | |
931 | * on the device physical size would cause a large write same | |
932 | * request to be split into physically unaligned chunks by | |
933 | * __blkdev_issue_write_zeroes() and __blkdev_issue_write_same() | |
934 | * even if the caller of these functions took care to align the | |
935 | * large request. So make sure the maximum reported is aligned | |
936 | * to the device physical block size. This is only an optional | |
937 | * optimization for regular disks, but this is mandatory to | |
938 | * avoid failure of large write same requests directed at | |
939 | * sequential write required zones of host-managed ZBC disks. | |
940 | */ | |
941 | sdkp->max_ws_blocks = | |
942 | round_down(sdkp->max_ws_blocks, | |
943 | bytes_to_logical(sdkp->device, | |
944 | sdkp->physical_block_size)); | |
945 | } | |
946 | ||
5db44863 | 947 | out: |
66c28f97 MP |
948 | blk_queue_max_write_same_sectors(q, sdkp->max_ws_blocks * |
949 | (logical_block_size >> 9)); | |
02d26103 CH |
950 | blk_queue_max_write_zeroes_sectors(q, sdkp->max_ws_blocks * |
951 | (logical_block_size >> 9)); | |
5db44863 MP |
952 | } |
953 | ||
954 | /** | |
955 | * sd_setup_write_same_cmnd - write the same data to multiple blocks | |
59b1134c | 956 | * @cmd: command to prepare |
5db44863 | 957 | * |
7529fbb0 DLM |
958 | * Will set up either WRITE SAME(10) or WRITE SAME(16) depending on |
959 | * the preference indicated by the target device. | |
5db44863 | 960 | **/ |
59b1134c | 961 | static int sd_setup_write_same_cmnd(struct scsi_cmnd *cmd) |
5db44863 | 962 | { |
59b1134c CH |
963 | struct request *rq = cmd->request; |
964 | struct scsi_device *sdp = cmd->device; | |
5db44863 MP |
965 | struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); |
966 | struct bio *bio = rq->bio; | |
967 | sector_t sector = blk_rq_pos(rq); | |
968 | unsigned int nr_sectors = blk_rq_sectors(rq); | |
08965c2e | 969 | unsigned int nr_bytes = blk_rq_bytes(rq); |
5db44863 MP |
970 | int ret; |
971 | ||
972 | if (sdkp->device->no_write_same) | |
0fb5b1fb | 973 | return BLKPREP_INVALID; |
5db44863 | 974 | |
a4ad39b1 | 975 | BUG_ON(bio_offset(bio) || bio_iovec(bio).bv_len != sdp->sector_size); |
5db44863 | 976 | |
89d94756 | 977 | if (sd_is_zoned(sdkp)) { |
a90dfdc2 | 978 | ret = sd_zbc_write_lock_zone(cmd); |
89d94756 HR |
979 | if (ret != BLKPREP_OK) |
980 | return ret; | |
981 | } | |
982 | ||
5db44863 MP |
983 | sector >>= ilog2(sdp->sector_size) - 9; |
984 | nr_sectors >>= ilog2(sdp->sector_size) - 9; | |
985 | ||
5db44863 | 986 | rq->timeout = SD_WRITE_SAME_TIMEOUT; |
5db44863 MP |
987 | |
988 | if (sdkp->ws16 || sector > 0xffffffff || nr_sectors > 0xffff) { | |
59b1134c CH |
989 | cmd->cmd_len = 16; |
990 | cmd->cmnd[0] = WRITE_SAME_16; | |
991 | put_unaligned_be64(sector, &cmd->cmnd[2]); | |
992 | put_unaligned_be32(nr_sectors, &cmd->cmnd[10]); | |
5db44863 | 993 | } else { |
59b1134c CH |
994 | cmd->cmd_len = 10; |
995 | cmd->cmnd[0] = WRITE_SAME; | |
996 | put_unaligned_be32(sector, &cmd->cmnd[2]); | |
997 | put_unaligned_be16(nr_sectors, &cmd->cmnd[7]); | |
5db44863 MP |
998 | } |
999 | ||
59b1134c | 1000 | cmd->transfersize = sdp->sector_size; |
a25ee548 | 1001 | cmd->allowed = SD_MAX_RETRIES; |
08965c2e BVA |
1002 | |
1003 | /* | |
1004 | * For WRITE SAME the data transferred via the DATA OUT buffer is | |
1005 | * different from the amount of data actually written to the target. | |
1006 | * | |
1007 | * We set up __data_len to the amount of data transferred via the | |
1008 | * DATA OUT buffer so that blk_rq_map_sg sets up the proper S/G list | |
1009 | * to transfer a single sector of data first, but then reset it to | |
1010 | * the amount of data to be written right after so that the I/O path | |
1011 | * knows how much to actually write. | |
1012 | */ | |
1013 | rq->__data_len = sdp->sector_size; | |
1014 | ret = scsi_init_io(cmd); | |
1015 | rq->__data_len = nr_bytes; | |
29f6ca69 DLM |
1016 | |
1017 | if (sd_is_zoned(sdkp) && ret != BLKPREP_OK) | |
1018 | sd_zbc_write_unlock_zone(cmd); | |
1019 | ||
08965c2e | 1020 | return ret; |
5db44863 MP |
1021 | } |
1022 | ||
a118c6c1 | 1023 | static int sd_setup_flush_cmnd(struct scsi_cmnd *cmd) |
90467c29 | 1024 | { |
a118c6c1 CH |
1025 | struct request *rq = cmd->request; |
1026 | ||
1027 | /* flush requests don't perform I/O, zero the S/G table */ | |
1028 | memset(&cmd->sdb, 0, sizeof(cmd->sdb)); | |
90467c29 | 1029 | |
a118c6c1 CH |
1030 | cmd->cmnd[0] = SYNCHRONIZE_CACHE; |
1031 | cmd->cmd_len = 10; | |
1032 | cmd->transfersize = 0; | |
1033 | cmd->allowed = SD_MAX_RETRIES; | |
1034 | ||
26b9fd8b | 1035 | rq->timeout = rq->q->rq_timeout * SD_FLUSH_TIMEOUT_MULTIPLIER; |
a118c6c1 | 1036 | return BLKPREP_OK; |
90467c29 FT |
1037 | } |
1038 | ||
87949eee | 1039 | static int sd_setup_read_write_cmnd(struct scsi_cmnd *SCpnt) |
1da177e4 | 1040 | { |
a1b73fc1 CH |
1041 | struct request *rq = SCpnt->request; |
1042 | struct scsi_device *sdp = SCpnt->device; | |
776b23a0 | 1043 | struct gendisk *disk = rq->rq_disk; |
89d94756 | 1044 | struct scsi_disk *sdkp = scsi_disk(disk); |
83096ebf | 1045 | sector_t block = blk_rq_pos(rq); |
18351070 | 1046 | sector_t threshold; |
83096ebf | 1047 | unsigned int this_count = blk_rq_sectors(rq); |
c611529e | 1048 | unsigned int dif, dix; |
89d94756 | 1049 | bool zoned_write = sd_is_zoned(sdkp) && rq_data_dir(rq) == WRITE; |
c611529e | 1050 | int ret; |
4e7392ec | 1051 | unsigned char protect; |
7f9a6bc4 | 1052 | |
89d94756 | 1053 | if (zoned_write) { |
a90dfdc2 | 1054 | ret = sd_zbc_write_lock_zone(SCpnt); |
89d94756 HR |
1055 | if (ret != BLKPREP_OK) |
1056 | return ret; | |
1057 | } | |
1058 | ||
3c356bde | 1059 | ret = scsi_init_io(SCpnt); |
7f9a6bc4 JB |
1060 | if (ret != BLKPREP_OK) |
1061 | goto out; | |
0624cbb1 | 1062 | WARN_ON_ONCE(SCpnt != rq->special); |
7f9a6bc4 JB |
1063 | |
1064 | /* from here on until we're complete, any goto out | |
1065 | * is used for a killable error condition */ | |
1066 | ret = BLKPREP_KILL; | |
1da177e4 | 1067 | |
a1b73fc1 CH |
1068 | SCSI_LOG_HLQUEUE(1, |
1069 | scmd_printk(KERN_INFO, SCpnt, | |
1070 | "%s: block=%llu, count=%d\n", | |
1071 | __func__, (unsigned long long)block, this_count)); | |
1da177e4 LT |
1072 | |
1073 | if (!sdp || !scsi_device_online(sdp) || | |
83096ebf | 1074 | block + blk_rq_sectors(rq) > get_capacity(disk)) { |
fa0d34be | 1075 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
83096ebf TH |
1076 | "Finishing %u sectors\n", |
1077 | blk_rq_sectors(rq))); | |
fa0d34be MP |
1078 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
1079 | "Retry with 0x%p\n", SCpnt)); | |
7f9a6bc4 | 1080 | goto out; |
1da177e4 LT |
1081 | } |
1082 | ||
1083 | if (sdp->changed) { | |
1084 | /* | |
1085 | * quietly refuse to do anything to a changed disc until | |
1086 | * the changed bit has been reset | |
1087 | */ | |
3ff5588d | 1088 | /* printk("SCSI disk has been changed or is not present. Prohibiting further I/O.\n"); */ |
7f9a6bc4 | 1089 | goto out; |
1da177e4 | 1090 | } |
7f9a6bc4 | 1091 | |
a0899d4d | 1092 | /* |
18351070 LT |
1093 | * Some SD card readers can't handle multi-sector accesses which touch |
1094 | * the last one or two hardware sectors. Split accesses as needed. | |
a0899d4d | 1095 | */ |
18351070 LT |
1096 | threshold = get_capacity(disk) - SD_LAST_BUGGY_SECTORS * |
1097 | (sdp->sector_size / 512); | |
1098 | ||
1099 | if (unlikely(sdp->last_sector_bug && block + this_count > threshold)) { | |
1100 | if (block < threshold) { | |
1101 | /* Access up to the threshold but not beyond */ | |
1102 | this_count = threshold - block; | |
1103 | } else { | |
1104 | /* Access only a single hardware sector */ | |
1105 | this_count = sdp->sector_size / 512; | |
1106 | } | |
1107 | } | |
a0899d4d | 1108 | |
fa0d34be MP |
1109 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, "block=%llu\n", |
1110 | (unsigned long long)block)); | |
1da177e4 LT |
1111 | |
1112 | /* | |
1113 | * If we have a 1K hardware sectorsize, prevent access to single | |
1114 | * 512 byte sectors. In theory we could handle this - in fact | |
1115 | * the scsi cdrom driver must be able to handle this because | |
1116 | * we typically use 1K blocksizes, and cdroms typically have | |
1117 | * 2K hardware sectorsizes. Of course, things are simpler | |
1118 | * with the cdrom, since it is read-only. For performance | |
1119 | * reasons, the filesystems should be able to handle this | |
1120 | * and not force the scsi disk driver to use bounce buffers | |
1121 | * for this. | |
1122 | */ | |
1123 | if (sdp->sector_size == 1024) { | |
83096ebf | 1124 | if ((block & 1) || (blk_rq_sectors(rq) & 1)) { |
e73aec82 MP |
1125 | scmd_printk(KERN_ERR, SCpnt, |
1126 | "Bad block number requested\n"); | |
7f9a6bc4 | 1127 | goto out; |
1da177e4 LT |
1128 | } else { |
1129 | block = block >> 1; | |
1130 | this_count = this_count >> 1; | |
1131 | } | |
1132 | } | |
1133 | if (sdp->sector_size == 2048) { | |
83096ebf | 1134 | if ((block & 3) || (blk_rq_sectors(rq) & 3)) { |
e73aec82 MP |
1135 | scmd_printk(KERN_ERR, SCpnt, |
1136 | "Bad block number requested\n"); | |
7f9a6bc4 | 1137 | goto out; |
1da177e4 LT |
1138 | } else { |
1139 | block = block >> 2; | |
1140 | this_count = this_count >> 2; | |
1141 | } | |
1142 | } | |
1143 | if (sdp->sector_size == 4096) { | |
83096ebf | 1144 | if ((block & 7) || (blk_rq_sectors(rq) & 7)) { |
e73aec82 MP |
1145 | scmd_printk(KERN_ERR, SCpnt, |
1146 | "Bad block number requested\n"); | |
7f9a6bc4 | 1147 | goto out; |
1da177e4 LT |
1148 | } else { |
1149 | block = block >> 3; | |
1150 | this_count = this_count >> 3; | |
1151 | } | |
1152 | } | |
1153 | if (rq_data_dir(rq) == WRITE) { | |
1da177e4 | 1154 | SCpnt->cmnd[0] = WRITE_6; |
af55ff67 | 1155 | |
8c579ab6 | 1156 | if (blk_integrity_rq(rq)) |
c611529e | 1157 | sd_dif_prepare(SCpnt); |
af55ff67 | 1158 | |
1da177e4 LT |
1159 | } else if (rq_data_dir(rq) == READ) { |
1160 | SCpnt->cmnd[0] = READ_6; | |
1da177e4 | 1161 | } else { |
ef295ecf | 1162 | scmd_printk(KERN_ERR, SCpnt, "Unknown command %d\n", req_op(rq)); |
7f9a6bc4 | 1163 | goto out; |
1da177e4 LT |
1164 | } |
1165 | ||
fa0d34be | 1166 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
83096ebf | 1167 | "%s %d/%u 512 byte blocks.\n", |
fa0d34be MP |
1168 | (rq_data_dir(rq) == WRITE) ? |
1169 | "writing" : "reading", this_count, | |
83096ebf | 1170 | blk_rq_sectors(rq))); |
1da177e4 | 1171 | |
c611529e MP |
1172 | dix = scsi_prot_sg_count(SCpnt); |
1173 | dif = scsi_host_dif_capable(SCpnt->device->host, sdkp->protection_type); | |
1174 | ||
1175 | if (dif || dix) | |
1176 | protect = sd_setup_protect_cmnd(SCpnt, dix, dif); | |
af55ff67 | 1177 | else |
4e7392ec MP |
1178 | protect = 0; |
1179 | ||
8475c811 | 1180 | if (protect && sdkp->protection_type == T10_PI_TYPE2_PROTECTION) { |
4e7392ec MP |
1181 | SCpnt->cmnd = mempool_alloc(sd_cdb_pool, GFP_ATOMIC); |
1182 | ||
1183 | if (unlikely(SCpnt->cmnd == NULL)) { | |
1184 | ret = BLKPREP_DEFER; | |
1185 | goto out; | |
1186 | } | |
af55ff67 | 1187 | |
4e7392ec MP |
1188 | SCpnt->cmd_len = SD_EXT_CDB_SIZE; |
1189 | memset(SCpnt->cmnd, 0, SCpnt->cmd_len); | |
1190 | SCpnt->cmnd[0] = VARIABLE_LENGTH_CMD; | |
1191 | SCpnt->cmnd[7] = 0x18; | |
1192 | SCpnt->cmnd[9] = (rq_data_dir(rq) == READ) ? READ_32 : WRITE_32; | |
33659ebb | 1193 | SCpnt->cmnd[10] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
4e7392ec MP |
1194 | |
1195 | /* LBA */ | |
1196 | SCpnt->cmnd[12] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0; | |
1197 | SCpnt->cmnd[13] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0; | |
1198 | SCpnt->cmnd[14] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0; | |
1199 | SCpnt->cmnd[15] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0; | |
1200 | SCpnt->cmnd[16] = (unsigned char) (block >> 24) & 0xff; | |
1201 | SCpnt->cmnd[17] = (unsigned char) (block >> 16) & 0xff; | |
1202 | SCpnt->cmnd[18] = (unsigned char) (block >> 8) & 0xff; | |
1203 | SCpnt->cmnd[19] = (unsigned char) block & 0xff; | |
1204 | ||
1205 | /* Expected Indirect LBA */ | |
1206 | SCpnt->cmnd[20] = (unsigned char) (block >> 24) & 0xff; | |
1207 | SCpnt->cmnd[21] = (unsigned char) (block >> 16) & 0xff; | |
1208 | SCpnt->cmnd[22] = (unsigned char) (block >> 8) & 0xff; | |
1209 | SCpnt->cmnd[23] = (unsigned char) block & 0xff; | |
1210 | ||
1211 | /* Transfer length */ | |
1212 | SCpnt->cmnd[28] = (unsigned char) (this_count >> 24) & 0xff; | |
1213 | SCpnt->cmnd[29] = (unsigned char) (this_count >> 16) & 0xff; | |
1214 | SCpnt->cmnd[30] = (unsigned char) (this_count >> 8) & 0xff; | |
1215 | SCpnt->cmnd[31] = (unsigned char) this_count & 0xff; | |
e430cbc8 | 1216 | } else if (sdp->use_16_for_rw || (this_count > 0xffff)) { |
1da177e4 | 1217 | SCpnt->cmnd[0] += READ_16 - READ_6; |
33659ebb | 1218 | SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
1da177e4 LT |
1219 | SCpnt->cmnd[2] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0; |
1220 | SCpnt->cmnd[3] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0; | |
1221 | SCpnt->cmnd[4] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0; | |
1222 | SCpnt->cmnd[5] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0; | |
1223 | SCpnt->cmnd[6] = (unsigned char) (block >> 24) & 0xff; | |
1224 | SCpnt->cmnd[7] = (unsigned char) (block >> 16) & 0xff; | |
1225 | SCpnt->cmnd[8] = (unsigned char) (block >> 8) & 0xff; | |
1226 | SCpnt->cmnd[9] = (unsigned char) block & 0xff; | |
1227 | SCpnt->cmnd[10] = (unsigned char) (this_count >> 24) & 0xff; | |
1228 | SCpnt->cmnd[11] = (unsigned char) (this_count >> 16) & 0xff; | |
1229 | SCpnt->cmnd[12] = (unsigned char) (this_count >> 8) & 0xff; | |
1230 | SCpnt->cmnd[13] = (unsigned char) this_count & 0xff; | |
1231 | SCpnt->cmnd[14] = SCpnt->cmnd[15] = 0; | |
1232 | } else if ((this_count > 0xff) || (block > 0x1fffff) || | |
af55ff67 | 1233 | scsi_device_protection(SCpnt->device) || |
1da177e4 | 1234 | SCpnt->device->use_10_for_rw) { |
1da177e4 | 1235 | SCpnt->cmnd[0] += READ_10 - READ_6; |
33659ebb | 1236 | SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
1da177e4 LT |
1237 | SCpnt->cmnd[2] = (unsigned char) (block >> 24) & 0xff; |
1238 | SCpnt->cmnd[3] = (unsigned char) (block >> 16) & 0xff; | |
1239 | SCpnt->cmnd[4] = (unsigned char) (block >> 8) & 0xff; | |
1240 | SCpnt->cmnd[5] = (unsigned char) block & 0xff; | |
1241 | SCpnt->cmnd[6] = SCpnt->cmnd[9] = 0; | |
1242 | SCpnt->cmnd[7] = (unsigned char) (this_count >> 8) & 0xff; | |
1243 | SCpnt->cmnd[8] = (unsigned char) this_count & 0xff; | |
1244 | } else { | |
33659ebb | 1245 | if (unlikely(rq->cmd_flags & REQ_FUA)) { |
007365ad TH |
1246 | /* |
1247 | * This happens only if this drive failed | |
1248 | * 10byte rw command with ILLEGAL_REQUEST | |
1249 | * during operation and thus turned off | |
1250 | * use_10_for_rw. | |
1251 | */ | |
e73aec82 MP |
1252 | scmd_printk(KERN_ERR, SCpnt, |
1253 | "FUA write on READ/WRITE(6) drive\n"); | |
7f9a6bc4 | 1254 | goto out; |
007365ad TH |
1255 | } |
1256 | ||
1da177e4 LT |
1257 | SCpnt->cmnd[1] |= (unsigned char) ((block >> 16) & 0x1f); |
1258 | SCpnt->cmnd[2] = (unsigned char) ((block >> 8) & 0xff); | |
1259 | SCpnt->cmnd[3] = (unsigned char) block & 0xff; | |
1260 | SCpnt->cmnd[4] = (unsigned char) this_count; | |
1261 | SCpnt->cmnd[5] = 0; | |
1262 | } | |
30b0c37b | 1263 | SCpnt->sdb.length = this_count * sdp->sector_size; |
1da177e4 LT |
1264 | |
1265 | /* | |
1266 | * We shouldn't disconnect in the middle of a sector, so with a dumb | |
1267 | * host adapter, it's safe to assume that we can at least transfer | |
1268 | * this many bytes between each connect / disconnect. | |
1269 | */ | |
1270 | SCpnt->transfersize = sdp->sector_size; | |
1271 | SCpnt->underflow = this_count << 9; | |
1272 | SCpnt->allowed = SD_MAX_RETRIES; | |
1da177e4 | 1273 | |
1da177e4 LT |
1274 | /* |
1275 | * This indicates that the command is ready from our end to be | |
1276 | * queued. | |
1277 | */ | |
7f9a6bc4 JB |
1278 | ret = BLKPREP_OK; |
1279 | out: | |
89d94756 | 1280 | if (zoned_write && ret != BLKPREP_OK) |
a90dfdc2 | 1281 | sd_zbc_write_unlock_zone(SCpnt); |
89d94756 | 1282 | |
a1b73fc1 | 1283 | return ret; |
1da177e4 LT |
1284 | } |
1285 | ||
87949eee CH |
1286 | static int sd_init_command(struct scsi_cmnd *cmd) |
1287 | { | |
1288 | struct request *rq = cmd->request; | |
1289 | ||
c2df40df MC |
1290 | switch (req_op(rq)) { |
1291 | case REQ_OP_DISCARD: | |
81d926e8 CH |
1292 | switch (scsi_disk(rq->rq_disk)->provisioning_mode) { |
1293 | case SD_LBP_UNMAP: | |
1294 | return sd_setup_unmap_cmnd(cmd); | |
1295 | case SD_LBP_WS16: | |
02d26103 | 1296 | return sd_setup_write_same16_cmnd(cmd, true); |
81d926e8 CH |
1297 | case SD_LBP_WS10: |
1298 | return sd_setup_write_same10_cmnd(cmd, true); | |
1299 | case SD_LBP_ZERO: | |
1300 | return sd_setup_write_same10_cmnd(cmd, false); | |
1301 | default: | |
1302 | return BLKPREP_INVALID; | |
1303 | } | |
02d26103 CH |
1304 | case REQ_OP_WRITE_ZEROES: |
1305 | return sd_setup_write_zeroes_cmnd(cmd); | |
c2df40df | 1306 | case REQ_OP_WRITE_SAME: |
87949eee | 1307 | return sd_setup_write_same_cmnd(cmd); |
3a5e02ce | 1308 | case REQ_OP_FLUSH: |
87949eee | 1309 | return sd_setup_flush_cmnd(cmd); |
c2df40df MC |
1310 | case REQ_OP_READ: |
1311 | case REQ_OP_WRITE: | |
87949eee | 1312 | return sd_setup_read_write_cmnd(cmd); |
89d94756 HR |
1313 | case REQ_OP_ZONE_REPORT: |
1314 | return sd_zbc_setup_report_cmnd(cmd); | |
1315 | case REQ_OP_ZONE_RESET: | |
1316 | return sd_zbc_setup_reset_cmnd(cmd); | |
c2df40df | 1317 | default: |
34abb797 JT |
1318 | WARN_ON_ONCE(1); |
1319 | return BLKPREP_KILL; | |
c2df40df | 1320 | } |
87949eee CH |
1321 | } |
1322 | ||
1323 | static void sd_uninit_command(struct scsi_cmnd *SCpnt) | |
1324 | { | |
1325 | struct request *rq = SCpnt->request; | |
14e3062f | 1326 | u8 *cmnd; |
87949eee | 1327 | |
70e42fd0 DLM |
1328 | if (SCpnt->flags & SCMD_ZONE_WRITE_LOCK) |
1329 | sd_zbc_write_unlock_zone(SCpnt); | |
1330 | ||
f9d03f96 | 1331 | if (rq->rq_flags & RQF_SPECIAL_PAYLOAD) |
1e76e375 | 1332 | mempool_free(rq->special_vec.bv_page, sd_page_pool); |
87949eee | 1333 | |
82ed4db4 | 1334 | if (SCpnt->cmnd != scsi_req(rq)->cmd) { |
14e3062f | 1335 | cmnd = SCpnt->cmnd; |
87949eee CH |
1336 | SCpnt->cmnd = NULL; |
1337 | SCpnt->cmd_len = 0; | |
14e3062f | 1338 | mempool_free(cmnd, sd_cdb_pool); |
87949eee CH |
1339 | } |
1340 | } | |
1341 | ||
1da177e4 LT |
1342 | /** |
1343 | * sd_open - open a scsi disk device | |
7529fbb0 DLM |
1344 | * @bdev: Block device of the scsi disk to open |
1345 | * @mode: FMODE_* mask | |
1da177e4 LT |
1346 | * |
1347 | * Returns 0 if successful. Returns a negated errno value in case | |
1348 | * of error. | |
1349 | * | |
1350 | * Note: This can be called from a user context (e.g. fsck(1) ) | |
1351 | * or from within the kernel (e.g. as a result of a mount(1) ). | |
1352 | * In the latter case @inode and @filp carry an abridged amount | |
1353 | * of information as noted above. | |
409f3499 AB |
1354 | * |
1355 | * Locking: called with bdev->bd_mutex held. | |
1da177e4 | 1356 | **/ |
0338e291 | 1357 | static int sd_open(struct block_device *bdev, fmode_t mode) |
1da177e4 | 1358 | { |
0338e291 | 1359 | struct scsi_disk *sdkp = scsi_disk_get(bdev->bd_disk); |
1da177e4 LT |
1360 | struct scsi_device *sdev; |
1361 | int retval; | |
1362 | ||
0338e291 | 1363 | if (!sdkp) |
1da177e4 LT |
1364 | return -ENXIO; |
1365 | ||
fa0d34be | 1366 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_open\n")); |
1da177e4 LT |
1367 | |
1368 | sdev = sdkp->device; | |
1369 | ||
1370 | /* | |
1371 | * If the device is in error recovery, wait until it is done. | |
1372 | * If the device is offline, then disallow any access to it. | |
1373 | */ | |
1374 | retval = -ENXIO; | |
1375 | if (!scsi_block_when_processing_errors(sdev)) | |
1376 | goto error_out; | |
1377 | ||
1378 | if (sdev->removable || sdkp->write_prot) | |
0338e291 | 1379 | check_disk_change(bdev); |
1da177e4 LT |
1380 | |
1381 | /* | |
1382 | * If the drive is empty, just let the open fail. | |
1383 | */ | |
1384 | retval = -ENOMEDIUM; | |
0338e291 | 1385 | if (sdev->removable && !sdkp->media_present && !(mode & FMODE_NDELAY)) |
1da177e4 LT |
1386 | goto error_out; |
1387 | ||
1388 | /* | |
1389 | * If the device has the write protect tab set, have the open fail | |
1390 | * if the user expects to be able to write to the thing. | |
1391 | */ | |
1392 | retval = -EROFS; | |
0338e291 | 1393 | if (sdkp->write_prot && (mode & FMODE_WRITE)) |
1da177e4 LT |
1394 | goto error_out; |
1395 | ||
1396 | /* | |
1397 | * It is possible that the disk changing stuff resulted in | |
1398 | * the device being taken offline. If this is the case, | |
1399 | * report this to the user, and don't pretend that the | |
1400 | * open actually succeeded. | |
1401 | */ | |
1402 | retval = -ENXIO; | |
1403 | if (!scsi_device_online(sdev)) | |
1404 | goto error_out; | |
1405 | ||
409f3499 | 1406 | if ((atomic_inc_return(&sdkp->openers) == 1) && sdev->removable) { |
1da177e4 LT |
1407 | if (scsi_block_when_processing_errors(sdev)) |
1408 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT); | |
1409 | } | |
1410 | ||
1411 | return 0; | |
1412 | ||
1413 | error_out: | |
1414 | scsi_disk_put(sdkp); | |
1415 | return retval; | |
1416 | } | |
1417 | ||
1418 | /** | |
1419 | * sd_release - invoked when the (last) close(2) is called on this | |
1420 | * scsi disk. | |
7529fbb0 DLM |
1421 | * @disk: disk to release |
1422 | * @mode: FMODE_* mask | |
1da177e4 LT |
1423 | * |
1424 | * Returns 0. | |
1425 | * | |
1426 | * Note: may block (uninterruptible) if error recovery is underway | |
1427 | * on this disk. | |
409f3499 AB |
1428 | * |
1429 | * Locking: called with bdev->bd_mutex held. | |
1da177e4 | 1430 | **/ |
db2a144b | 1431 | static void sd_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 1432 | { |
1da177e4 LT |
1433 | struct scsi_disk *sdkp = scsi_disk(disk); |
1434 | struct scsi_device *sdev = sdkp->device; | |
1435 | ||
56937f7b | 1436 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_release\n")); |
1da177e4 | 1437 | |
7e443312 | 1438 | if (atomic_dec_return(&sdkp->openers) == 0 && sdev->removable) { |
1da177e4 LT |
1439 | if (scsi_block_when_processing_errors(sdev)) |
1440 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW); | |
1441 | } | |
1442 | ||
1da177e4 | 1443 | scsi_disk_put(sdkp); |
1da177e4 LT |
1444 | } |
1445 | ||
a885c8c4 | 1446 | static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
1da177e4 LT |
1447 | { |
1448 | struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk); | |
1449 | struct scsi_device *sdp = sdkp->device; | |
1450 | struct Scsi_Host *host = sdp->host; | |
f08bb1e0 | 1451 | sector_t capacity = logical_to_sectors(sdp, sdkp->capacity); |
1da177e4 LT |
1452 | int diskinfo[4]; |
1453 | ||
1454 | /* default to most commonly used values */ | |
f08bb1e0 MP |
1455 | diskinfo[0] = 0x40; /* 1 << 6 */ |
1456 | diskinfo[1] = 0x20; /* 1 << 5 */ | |
1457 | diskinfo[2] = capacity >> 11; | |
1458 | ||
1da177e4 LT |
1459 | /* override with calculated, extended default, or driver values */ |
1460 | if (host->hostt->bios_param) | |
f08bb1e0 | 1461 | host->hostt->bios_param(sdp, bdev, capacity, diskinfo); |
1da177e4 | 1462 | else |
f08bb1e0 | 1463 | scsicam_bios_param(bdev, capacity, diskinfo); |
1da177e4 | 1464 | |
a885c8c4 CH |
1465 | geo->heads = diskinfo[0]; |
1466 | geo->sectors = diskinfo[1]; | |
1467 | geo->cylinders = diskinfo[2]; | |
1da177e4 LT |
1468 | return 0; |
1469 | } | |
1470 | ||
1471 | /** | |
1472 | * sd_ioctl - process an ioctl | |
7529fbb0 DLM |
1473 | * @bdev: target block device |
1474 | * @mode: FMODE_* mask | |
1da177e4 LT |
1475 | * @cmd: ioctl command number |
1476 | * @arg: this is third argument given to ioctl(2) system call. | |
1477 | * Often contains a pointer. | |
1478 | * | |
25985edc | 1479 | * Returns 0 if successful (some ioctls return positive numbers on |
1da177e4 LT |
1480 | * success as well). Returns a negated errno value in case of error. |
1481 | * | |
1482 | * Note: most ioctls are forward onto the block subsystem or further | |
3a4fa0a2 | 1483 | * down in the scsi subsystem. |
1da177e4 | 1484 | **/ |
0338e291 | 1485 | static int sd_ioctl(struct block_device *bdev, fmode_t mode, |
1da177e4 LT |
1486 | unsigned int cmd, unsigned long arg) |
1487 | { | |
1da177e4 | 1488 | struct gendisk *disk = bdev->bd_disk; |
fe2d1851 NN |
1489 | struct scsi_disk *sdkp = scsi_disk(disk); |
1490 | struct scsi_device *sdp = sdkp->device; | |
1da177e4 LT |
1491 | void __user *p = (void __user *)arg; |
1492 | int error; | |
1493 | ||
fe2d1851 NN |
1494 | SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO, sdkp, "sd_ioctl: disk=%s, " |
1495 | "cmd=0x%x\n", disk->disk_name, cmd)); | |
1da177e4 | 1496 | |
0bfc96cb PB |
1497 | error = scsi_verify_blk_ioctl(bdev, cmd); |
1498 | if (error < 0) | |
1499 | return error; | |
1500 | ||
1da177e4 LT |
1501 | /* |
1502 | * If we are in the middle of error recovery, don't let anyone | |
1503 | * else try and use this device. Also, if error recovery fails, it | |
1504 | * may try and take the device offline, in which case all further | |
1505 | * access to the device is prohibited. | |
1506 | */ | |
906d15fb CH |
1507 | error = scsi_ioctl_block_when_processing_errors(sdp, cmd, |
1508 | (mode & FMODE_NDELAY) != 0); | |
1509 | if (error) | |
8a6cfeb6 | 1510 | goto out; |
1da177e4 | 1511 | |
d80210f2 CH |
1512 | if (is_sed_ioctl(cmd)) |
1513 | return sed_ioctl(sdkp->opal_dev, cmd, p); | |
1514 | ||
1da177e4 LT |
1515 | /* |
1516 | * Send SCSI addressing ioctls directly to mid level, send other | |
1517 | * ioctls to block level and then onto mid level if they can't be | |
1518 | * resolved. | |
1519 | */ | |
1520 | switch (cmd) { | |
1521 | case SCSI_IOCTL_GET_IDLUN: | |
1522 | case SCSI_IOCTL_GET_BUS_NUMBER: | |
8a6cfeb6 AB |
1523 | error = scsi_ioctl(sdp, cmd, p); |
1524 | break; | |
1da177e4 | 1525 | default: |
577ebb37 | 1526 | error = scsi_cmd_blk_ioctl(bdev, mode, cmd, p); |
1da177e4 | 1527 | if (error != -ENOTTY) |
8a6cfeb6 AB |
1528 | break; |
1529 | error = scsi_ioctl(sdp, cmd, p); | |
1530 | break; | |
1da177e4 | 1531 | } |
8a6cfeb6 | 1532 | out: |
8a6cfeb6 | 1533 | return error; |
1da177e4 LT |
1534 | } |
1535 | ||
1536 | static void set_media_not_present(struct scsi_disk *sdkp) | |
1537 | { | |
2bae0093 TH |
1538 | if (sdkp->media_present) |
1539 | sdkp->device->changed = 1; | |
1540 | ||
1541 | if (sdkp->device->removable) { | |
1542 | sdkp->media_present = 0; | |
1543 | sdkp->capacity = 0; | |
1544 | } | |
1545 | } | |
1546 | ||
1547 | static int media_not_present(struct scsi_disk *sdkp, | |
1548 | struct scsi_sense_hdr *sshdr) | |
1549 | { | |
1550 | if (!scsi_sense_valid(sshdr)) | |
1551 | return 0; | |
1552 | ||
1553 | /* not invoked for commands that could return deferred errors */ | |
1554 | switch (sshdr->sense_key) { | |
1555 | case UNIT_ATTENTION: | |
1556 | case NOT_READY: | |
1557 | /* medium not present */ | |
1558 | if (sshdr->asc == 0x3A) { | |
1559 | set_media_not_present(sdkp); | |
1560 | return 1; | |
1561 | } | |
1562 | } | |
1563 | return 0; | |
1da177e4 LT |
1564 | } |
1565 | ||
1566 | /** | |
2bae0093 TH |
1567 | * sd_check_events - check media events |
1568 | * @disk: kernel device descriptor | |
1569 | * @clearing: disk events currently being cleared | |
1da177e4 | 1570 | * |
2bae0093 | 1571 | * Returns mask of DISK_EVENT_*. |
1da177e4 LT |
1572 | * |
1573 | * Note: this function is invoked from the block subsystem. | |
1574 | **/ | |
2bae0093 | 1575 | static unsigned int sd_check_events(struct gendisk *disk, unsigned int clearing) |
1da177e4 | 1576 | { |
eb72d0bb HR |
1577 | struct scsi_disk *sdkp = scsi_disk_get(disk); |
1578 | struct scsi_device *sdp; | |
1da177e4 LT |
1579 | int retval; |
1580 | ||
eb72d0bb HR |
1581 | if (!sdkp) |
1582 | return 0; | |
1583 | ||
1584 | sdp = sdkp->device; | |
2bae0093 | 1585 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_check_events\n")); |
1da177e4 LT |
1586 | |
1587 | /* | |
1588 | * If the device is offline, don't send any commands - just pretend as | |
1589 | * if the command failed. If the device ever comes back online, we | |
1590 | * can deal with it then. It is only because of unrecoverable errors | |
1591 | * that we would ever take a device offline in the first place. | |
1592 | */ | |
285e9670 KS |
1593 | if (!scsi_device_online(sdp)) { |
1594 | set_media_not_present(sdkp); | |
285e9670 KS |
1595 | goto out; |
1596 | } | |
1da177e4 LT |
1597 | |
1598 | /* | |
1599 | * Using TEST_UNIT_READY enables differentiation between drive with | |
1600 | * no cartridge loaded - NOT READY, drive with changed cartridge - | |
1601 | * UNIT ATTENTION, or with same cartridge - GOOD STATUS. | |
1602 | * | |
1603 | * Drives that auto spin down. eg iomega jaz 1G, will be started | |
1604 | * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever | |
1605 | * sd_revalidate() is called. | |
1606 | */ | |
001aac25 | 1607 | if (scsi_block_when_processing_errors(sdp)) { |
6fa2b8f9 CH |
1608 | struct scsi_sense_hdr sshdr = { 0, }; |
1609 | ||
001aac25 | 1610 | retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, SD_MAX_RETRIES, |
6fa2b8f9 | 1611 | &sshdr); |
1da177e4 | 1612 | |
6fa2b8f9 CH |
1613 | /* failed to execute TUR, assume media not present */ |
1614 | if (host_byte(retval)) { | |
1615 | set_media_not_present(sdkp); | |
1616 | goto out; | |
1617 | } | |
1da177e4 | 1618 | |
6fa2b8f9 CH |
1619 | if (media_not_present(sdkp, &sshdr)) |
1620 | goto out; | |
1621 | } | |
2bae0093 | 1622 | |
1da177e4 LT |
1623 | /* |
1624 | * For removable scsi disk we have to recognise the presence | |
2bae0093 | 1625 | * of a disk in the drive. |
1da177e4 | 1626 | */ |
2bae0093 TH |
1627 | if (!sdkp->media_present) |
1628 | sdp->changed = 1; | |
1da177e4 | 1629 | sdkp->media_present = 1; |
285e9670 | 1630 | out: |
3ff5588d | 1631 | /* |
2bae0093 | 1632 | * sdp->changed is set under the following conditions: |
3ff5588d | 1633 | * |
2bae0093 TH |
1634 | * Medium present state has changed in either direction. |
1635 | * Device has indicated UNIT_ATTENTION. | |
3ff5588d | 1636 | */ |
2bae0093 TH |
1637 | retval = sdp->changed ? DISK_EVENT_MEDIA_CHANGE : 0; |
1638 | sdp->changed = 0; | |
eb72d0bb | 1639 | scsi_disk_put(sdkp); |
1da177e4 | 1640 | return retval; |
1da177e4 LT |
1641 | } |
1642 | ||
4fa83244 | 1643 | static int sd_sync_cache(struct scsi_disk *sdkp, struct scsi_sense_hdr *sshdr) |
1da177e4 | 1644 | { |
1da177e4 | 1645 | int retries, res; |
e73aec82 | 1646 | struct scsi_device *sdp = sdkp->device; |
7e660100 JB |
1647 | const int timeout = sdp->request_queue->rq_timeout |
1648 | * SD_FLUSH_TIMEOUT_MULTIPLIER; | |
4fa83244 | 1649 | struct scsi_sense_hdr my_sshdr; |
1da177e4 LT |
1650 | |
1651 | if (!scsi_device_online(sdp)) | |
1652 | return -ENODEV; | |
1653 | ||
4fa83244 DB |
1654 | /* caller might not be interested in sense, but we need it */ |
1655 | if (!sshdr) | |
1656 | sshdr = &my_sshdr; | |
1657 | ||
1da177e4 LT |
1658 | for (retries = 3; retries > 0; --retries) { |
1659 | unsigned char cmd[10] = { 0 }; | |
1660 | ||
1661 | cmd[0] = SYNCHRONIZE_CACHE; | |
1662 | /* | |
1663 | * Leave the rest of the command zero to indicate | |
1664 | * flush everything. | |
1665 | */ | |
4fa83244 | 1666 | res = scsi_execute(sdp, cmd, DMA_NONE, NULL, 0, NULL, sshdr, |
fcbfffe2 | 1667 | timeout, SD_MAX_RETRIES, 0, RQF_PM, NULL); |
ea73a9f2 | 1668 | if (res == 0) |
1da177e4 LT |
1669 | break; |
1670 | } | |
1671 | ||
e73aec82 | 1672 | if (res) { |
ef61329d | 1673 | sd_print_result(sdkp, "Synchronize Cache(10) failed", res); |
95897910 | 1674 | |
e73aec82 | 1675 | if (driver_byte(res) & DRIVER_SENSE) |
4fa83244 DB |
1676 | sd_print_sense_hdr(sdkp, sshdr); |
1677 | ||
95897910 | 1678 | /* we need to evaluate the error return */ |
4fa83244 DB |
1679 | if (scsi_sense_valid(sshdr) && |
1680 | (sshdr->asc == 0x3a || /* medium not present */ | |
59574d8a ON |
1681 | sshdr->asc == 0x20 || /* invalid command */ |
1682 | (sshdr->asc == 0x74 && sshdr->ascq == 0x71))) /* drive is password locked */ | |
95897910 ON |
1683 | /* this is no error here */ |
1684 | return 0; | |
1685 | ||
1686 | switch (host_byte(res)) { | |
1687 | /* ignore errors due to racing a disconnection */ | |
1688 | case DID_BAD_TARGET: | |
1689 | case DID_NO_CONNECT: | |
1690 | return 0; | |
1691 | /* signal the upper layer it might try again */ | |
1692 | case DID_BUS_BUSY: | |
1693 | case DID_IMM_RETRY: | |
1694 | case DID_REQUEUE: | |
1695 | case DID_SOFT_ERROR: | |
1696 | return -EBUSY; | |
1697 | default: | |
1698 | return -EIO; | |
1699 | } | |
1da177e4 | 1700 | } |
3721050a | 1701 | return 0; |
1da177e4 LT |
1702 | } |
1703 | ||
1da177e4 LT |
1704 | static void sd_rescan(struct device *dev) |
1705 | { | |
3d9a1f53 | 1706 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
39b7f1e2 | 1707 | |
3d9a1f53 | 1708 | revalidate_disk(sdkp->disk); |
1da177e4 LT |
1709 | } |
1710 | ||
1711 | ||
1712 | #ifdef CONFIG_COMPAT | |
1713 | /* | |
1714 | * This gets directly called from VFS. When the ioctl | |
1715 | * is not recognized we go back to the other translation paths. | |
1716 | */ | |
0338e291 AV |
1717 | static int sd_compat_ioctl(struct block_device *bdev, fmode_t mode, |
1718 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1719 | { |
a3343fa8 AB |
1720 | struct gendisk *disk = bdev->bd_disk; |
1721 | struct scsi_disk *sdkp = scsi_disk(disk); | |
1722 | struct scsi_device *sdev = sdkp->device; | |
1723 | void __user *p = compat_ptr(arg); | |
21a9d4c9 | 1724 | int error; |
1da177e4 | 1725 | |
a3343fa8 AB |
1726 | error = scsi_verify_blk_ioctl(bdev, cmd); |
1727 | if (error < 0) | |
1728 | return error; | |
1729 | ||
21a9d4c9 CH |
1730 | error = scsi_ioctl_block_when_processing_errors(sdev, cmd, |
1731 | (mode & FMODE_NDELAY) != 0); | |
1732 | if (error) | |
1733 | return error; | |
a3343fa8 AB |
1734 | |
1735 | if (is_sed_ioctl(cmd)) | |
1736 | return sed_ioctl(sdkp->opal_dev, cmd, p); | |
1da177e4 | 1737 | |
1da177e4 LT |
1738 | /* |
1739 | * Let the static ioctl translation table take care of it. | |
1740 | */ | |
21a9d4c9 CH |
1741 | if (!sdev->host->hostt->compat_ioctl) |
1742 | return -ENOIOCTLCMD; | |
a3343fa8 | 1743 | return sdev->host->hostt->compat_ioctl(sdev, cmd, p); |
1da177e4 LT |
1744 | } |
1745 | #endif | |
1746 | ||
924d55b0 CH |
1747 | static char sd_pr_type(enum pr_type type) |
1748 | { | |
1749 | switch (type) { | |
1750 | case PR_WRITE_EXCLUSIVE: | |
1751 | return 0x01; | |
1752 | case PR_EXCLUSIVE_ACCESS: | |
1753 | return 0x03; | |
1754 | case PR_WRITE_EXCLUSIVE_REG_ONLY: | |
1755 | return 0x05; | |
1756 | case PR_EXCLUSIVE_ACCESS_REG_ONLY: | |
1757 | return 0x06; | |
1758 | case PR_WRITE_EXCLUSIVE_ALL_REGS: | |
1759 | return 0x07; | |
1760 | case PR_EXCLUSIVE_ACCESS_ALL_REGS: | |
1761 | return 0x08; | |
1762 | default: | |
1763 | return 0; | |
1764 | } | |
1765 | }; | |
1766 | ||
1767 | static int sd_pr_command(struct block_device *bdev, u8 sa, | |
1768 | u64 key, u64 sa_key, u8 type, u8 flags) | |
1769 | { | |
1770 | struct scsi_device *sdev = scsi_disk(bdev->bd_disk)->device; | |
1771 | struct scsi_sense_hdr sshdr; | |
1772 | int result; | |
1773 | u8 cmd[16] = { 0, }; | |
1774 | u8 data[24] = { 0, }; | |
1775 | ||
1776 | cmd[0] = PERSISTENT_RESERVE_OUT; | |
1777 | cmd[1] = sa; | |
1778 | cmd[2] = type; | |
1779 | put_unaligned_be32(sizeof(data), &cmd[5]); | |
1780 | ||
1781 | put_unaligned_be64(key, &data[0]); | |
1782 | put_unaligned_be64(sa_key, &data[8]); | |
1783 | data[20] = flags; | |
1784 | ||
1785 | result = scsi_execute_req(sdev, cmd, DMA_TO_DEVICE, &data, sizeof(data), | |
1786 | &sshdr, SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
1787 | ||
1788 | if ((driver_byte(result) & DRIVER_SENSE) && | |
1789 | (scsi_sense_valid(&sshdr))) { | |
1790 | sdev_printk(KERN_INFO, sdev, "PR command failed: %d\n", result); | |
1791 | scsi_print_sense_hdr(sdev, NULL, &sshdr); | |
1792 | } | |
1793 | ||
1794 | return result; | |
1795 | } | |
1796 | ||
1797 | static int sd_pr_register(struct block_device *bdev, u64 old_key, u64 new_key, | |
1798 | u32 flags) | |
1799 | { | |
1800 | if (flags & ~PR_FL_IGNORE_KEY) | |
1801 | return -EOPNOTSUPP; | |
1802 | return sd_pr_command(bdev, (flags & PR_FL_IGNORE_KEY) ? 0x06 : 0x00, | |
1803 | old_key, new_key, 0, | |
01f90dd9 | 1804 | (1 << 0) /* APTPL */); |
924d55b0 CH |
1805 | } |
1806 | ||
1807 | static int sd_pr_reserve(struct block_device *bdev, u64 key, enum pr_type type, | |
1808 | u32 flags) | |
1809 | { | |
1810 | if (flags) | |
1811 | return -EOPNOTSUPP; | |
1812 | return sd_pr_command(bdev, 0x01, key, 0, sd_pr_type(type), 0); | |
1813 | } | |
1814 | ||
1815 | static int sd_pr_release(struct block_device *bdev, u64 key, enum pr_type type) | |
1816 | { | |
1817 | return sd_pr_command(bdev, 0x02, key, 0, sd_pr_type(type), 0); | |
1818 | } | |
1819 | ||
1820 | static int sd_pr_preempt(struct block_device *bdev, u64 old_key, u64 new_key, | |
1821 | enum pr_type type, bool abort) | |
1822 | { | |
1823 | return sd_pr_command(bdev, abort ? 0x05 : 0x04, old_key, new_key, | |
1824 | sd_pr_type(type), 0); | |
1825 | } | |
1826 | ||
1827 | static int sd_pr_clear(struct block_device *bdev, u64 key) | |
1828 | { | |
1829 | return sd_pr_command(bdev, 0x03, key, 0, 0, 0); | |
1830 | } | |
1831 | ||
1832 | static const struct pr_ops sd_pr_ops = { | |
1833 | .pr_register = sd_pr_register, | |
1834 | .pr_reserve = sd_pr_reserve, | |
1835 | .pr_release = sd_pr_release, | |
1836 | .pr_preempt = sd_pr_preempt, | |
1837 | .pr_clear = sd_pr_clear, | |
1838 | }; | |
1839 | ||
83d5cde4 | 1840 | static const struct block_device_operations sd_fops = { |
1da177e4 | 1841 | .owner = THIS_MODULE, |
0338e291 AV |
1842 | .open = sd_open, |
1843 | .release = sd_release, | |
8a6cfeb6 | 1844 | .ioctl = sd_ioctl, |
a885c8c4 | 1845 | .getgeo = sd_getgeo, |
1da177e4 | 1846 | #ifdef CONFIG_COMPAT |
0338e291 | 1847 | .compat_ioctl = sd_compat_ioctl, |
1da177e4 | 1848 | #endif |
2bae0093 | 1849 | .check_events = sd_check_events, |
1da177e4 | 1850 | .revalidate_disk = sd_revalidate_disk, |
72ec24bd | 1851 | .unlock_native_capacity = sd_unlock_native_capacity, |
924d55b0 | 1852 | .pr_ops = &sd_pr_ops, |
1da177e4 LT |
1853 | }; |
1854 | ||
7a38dc0b HR |
1855 | /** |
1856 | * sd_eh_reset - reset error handling callback | |
1857 | * @scmd: sd-issued command that has failed | |
1858 | * | |
1859 | * This function is called by the SCSI midlayer before starting | |
1860 | * SCSI EH. When counting medium access failures we have to be | |
1861 | * careful to register it only only once per device and SCSI EH run; | |
1862 | * there might be several timed out commands which will cause the | |
1863 | * 'max_medium_access_timeouts' counter to trigger after the first | |
1864 | * SCSI EH run already and set the device to offline. | |
1865 | * So this function resets the internal counter before starting SCSI EH. | |
1866 | **/ | |
1867 | static void sd_eh_reset(struct scsi_cmnd *scmd) | |
1868 | { | |
1869 | struct scsi_disk *sdkp = scsi_disk(scmd->request->rq_disk); | |
1870 | ||
1871 | /* New SCSI EH run, reset gate variable */ | |
1872 | sdkp->ignore_medium_access_errors = false; | |
1873 | } | |
1874 | ||
18a4d0a2 MP |
1875 | /** |
1876 | * sd_eh_action - error handling callback | |
1877 | * @scmd: sd-issued command that has failed | |
18a4d0a2 MP |
1878 | * @eh_disp: The recovery disposition suggested by the midlayer |
1879 | * | |
2451079b JB |
1880 | * This function is called by the SCSI midlayer upon completion of an |
1881 | * error test command (currently TEST UNIT READY). The result of sending | |
1882 | * the eh command is passed in eh_disp. We're looking for devices that | |
1883 | * fail medium access commands but are OK with non access commands like | |
1884 | * test unit ready (so wrongly see the device as having a successful | |
1885 | * recovery) | |
18a4d0a2 | 1886 | **/ |
2451079b | 1887 | static int sd_eh_action(struct scsi_cmnd *scmd, int eh_disp) |
18a4d0a2 MP |
1888 | { |
1889 | struct scsi_disk *sdkp = scsi_disk(scmd->request->rq_disk); | |
0db6ca8a | 1890 | struct scsi_device *sdev = scmd->device; |
18a4d0a2 | 1891 | |
0db6ca8a | 1892 | if (!scsi_device_online(sdev) || |
2451079b JB |
1893 | !scsi_medium_access_command(scmd) || |
1894 | host_byte(scmd->result) != DID_TIME_OUT || | |
1895 | eh_disp != SUCCESS) | |
18a4d0a2 MP |
1896 | return eh_disp; |
1897 | ||
1898 | /* | |
1899 | * The device has timed out executing a medium access command. | |
1900 | * However, the TEST UNIT READY command sent during error | |
1901 | * handling completed successfully. Either the device is in the | |
1902 | * process of recovering or has it suffered an internal failure | |
1903 | * that prevents access to the storage medium. | |
1904 | */ | |
7a38dc0b HR |
1905 | if (!sdkp->ignore_medium_access_errors) { |
1906 | sdkp->medium_access_timed_out++; | |
1907 | sdkp->ignore_medium_access_errors = true; | |
1908 | } | |
18a4d0a2 MP |
1909 | |
1910 | /* | |
1911 | * If the device keeps failing read/write commands but TEST UNIT | |
1912 | * READY always completes successfully we assume that medium | |
1913 | * access is no longer possible and take the device offline. | |
1914 | */ | |
1915 | if (sdkp->medium_access_timed_out >= sdkp->max_medium_access_timeouts) { | |
1916 | scmd_printk(KERN_ERR, scmd, | |
1917 | "Medium access timeout failure. Offlining disk!\n"); | |
0db6ca8a BVA |
1918 | mutex_lock(&sdev->state_mutex); |
1919 | scsi_device_set_state(sdev, SDEV_OFFLINE); | |
1920 | mutex_unlock(&sdev->state_mutex); | |
18a4d0a2 | 1921 | |
e8f8d50e | 1922 | return SUCCESS; |
18a4d0a2 MP |
1923 | } |
1924 | ||
1925 | return eh_disp; | |
1926 | } | |
1927 | ||
af55ff67 MP |
1928 | static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd) |
1929 | { | |
6eadc612 DLM |
1930 | struct request *req = scmd->request; |
1931 | struct scsi_device *sdev = scmd->device; | |
1932 | unsigned int transferred, good_bytes; | |
1933 | u64 start_lba, end_lba, bad_lba; | |
1934 | ||
a8733c7b | 1935 | /* |
6eadc612 DLM |
1936 | * Some commands have a payload smaller than the device logical |
1937 | * block size (e.g. INQUIRY on a 4K disk). | |
a8733c7b | 1938 | */ |
6eadc612 | 1939 | if (scsi_bufflen(scmd) <= sdev->sector_size) |
af55ff67 MP |
1940 | return 0; |
1941 | ||
6eadc612 DLM |
1942 | /* Check if we have a 'bad_lba' information */ |
1943 | if (!scsi_get_sense_info_fld(scmd->sense_buffer, | |
1944 | SCSI_SENSE_BUFFERSIZE, | |
1945 | &bad_lba)) | |
af55ff67 MP |
1946 | return 0; |
1947 | ||
6eadc612 DLM |
1948 | /* |
1949 | * If the bad lba was reported incorrectly, we have no idea where | |
af55ff67 MP |
1950 | * the error is. |
1951 | */ | |
6eadc612 DLM |
1952 | start_lba = sectors_to_logical(sdev, blk_rq_pos(req)); |
1953 | end_lba = start_lba + bytes_to_logical(sdev, scsi_bufflen(scmd)); | |
1954 | if (bad_lba < start_lba || bad_lba >= end_lba) | |
af55ff67 MP |
1955 | return 0; |
1956 | ||
6eadc612 DLM |
1957 | /* |
1958 | * resid is optional but mostly filled in. When it's unused, | |
1959 | * its value is zero, so we assume the whole buffer transferred | |
af55ff67 | 1960 | */ |
6eadc612 DLM |
1961 | transferred = scsi_bufflen(scmd) - scsi_get_resid(scmd); |
1962 | ||
1963 | /* This computation should always be done in terms of the | |
1964 | * resolution of the device's medium. | |
af55ff67 | 1965 | */ |
6eadc612 DLM |
1966 | good_bytes = logical_to_bytes(sdev, bad_lba - start_lba); |
1967 | ||
a8733c7b | 1968 | return min(good_bytes, transferred); |
af55ff67 MP |
1969 | } |
1970 | ||
1da177e4 | 1971 | /** |
7b3d9545 | 1972 | * sd_done - bottom half handler: called when the lower level |
1da177e4 LT |
1973 | * driver has completed (successfully or otherwise) a scsi command. |
1974 | * @SCpnt: mid-level's per command structure. | |
1975 | * | |
1976 | * Note: potentially run from within an ISR. Must not block. | |
1977 | **/ | |
7b3d9545 | 1978 | static int sd_done(struct scsi_cmnd *SCpnt) |
1da177e4 LT |
1979 | { |
1980 | int result = SCpnt->result; | |
af55ff67 | 1981 | unsigned int good_bytes = result ? 0 : scsi_bufflen(SCpnt); |
c46f0917 DLM |
1982 | unsigned int sector_size = SCpnt->device->sector_size; |
1983 | unsigned int resid; | |
1da177e4 | 1984 | struct scsi_sense_hdr sshdr; |
4e7392ec | 1985 | struct scsi_disk *sdkp = scsi_disk(SCpnt->request->rq_disk); |
26e85fcd | 1986 | struct request *req = SCpnt->request; |
1da177e4 LT |
1987 | int sense_valid = 0; |
1988 | int sense_deferred = 0; | |
1da177e4 | 1989 | |
89d94756 HR |
1990 | switch (req_op(req)) { |
1991 | case REQ_OP_DISCARD: | |
02d26103 | 1992 | case REQ_OP_WRITE_ZEROES: |
89d94756 HR |
1993 | case REQ_OP_WRITE_SAME: |
1994 | case REQ_OP_ZONE_RESET: | |
26e85fcd MP |
1995 | if (!result) { |
1996 | good_bytes = blk_rq_bytes(req); | |
1997 | scsi_set_resid(SCpnt, 0); | |
1998 | } else { | |
1999 | good_bytes = 0; | |
2000 | scsi_set_resid(SCpnt, blk_rq_bytes(req)); | |
2001 | } | |
89d94756 HR |
2002 | break; |
2003 | case REQ_OP_ZONE_REPORT: | |
ffeb1539 MS |
2004 | /* To avoid that the block layer performs an incorrect |
2005 | * bio_advance() call and restart of the remainder of | |
2006 | * incomplete report zone BIOs, always indicate a full | |
2007 | * completion of REQ_OP_ZONE_REPORT. | |
2008 | */ | |
89d94756 | 2009 | if (!result) { |
ffeb1539 | 2010 | good_bytes = scsi_bufflen(SCpnt); |
89d94756 HR |
2011 | scsi_set_resid(SCpnt, 0); |
2012 | } else { | |
2013 | good_bytes = 0; | |
2014 | scsi_set_resid(SCpnt, blk_rq_bytes(req)); | |
2015 | } | |
2016 | break; | |
c46f0917 DLM |
2017 | default: |
2018 | /* | |
2019 | * In case of bogus fw or device, we could end up having | |
2020 | * an unaligned partial completion. Check this here and force | |
2021 | * alignment. | |
2022 | */ | |
2023 | resid = scsi_get_resid(SCpnt); | |
2024 | if (resid & (sector_size - 1)) { | |
2025 | sd_printk(KERN_INFO, sdkp, | |
2026 | "Unaligned partial completion (resid=%u, sector_sz=%u)\n", | |
2027 | resid, sector_size); | |
2028 | resid = min(scsi_bufflen(SCpnt), | |
2029 | round_up(resid, sector_size)); | |
2030 | scsi_set_resid(SCpnt, resid); | |
2031 | } | |
26e85fcd | 2032 | } |
6a32a8ae | 2033 | |
1da177e4 LT |
2034 | if (result) { |
2035 | sense_valid = scsi_command_normalize_sense(SCpnt, &sshdr); | |
2036 | if (sense_valid) | |
2037 | sense_deferred = scsi_sense_is_deferred(&sshdr); | |
2038 | } | |
2a863ba8 DJ |
2039 | sdkp->medium_access_timed_out = 0; |
2040 | ||
03aba2f7 LT |
2041 | if (driver_byte(result) != DRIVER_SENSE && |
2042 | (!sense_valid || sense_deferred)) | |
2043 | goto out; | |
2044 | ||
2045 | switch (sshdr.sense_key) { | |
2046 | case HARDWARE_ERROR: | |
2047 | case MEDIUM_ERROR: | |
af55ff67 | 2048 | good_bytes = sd_completed_bytes(SCpnt); |
03aba2f7 LT |
2049 | break; |
2050 | case RECOVERED_ERROR: | |
af55ff67 MP |
2051 | good_bytes = scsi_bufflen(SCpnt); |
2052 | break; | |
10dab226 JW |
2053 | case NO_SENSE: |
2054 | /* This indicates a false check condition, so ignore it. An | |
2055 | * unknown amount of data was transferred so treat it as an | |
2056 | * error. | |
2057 | */ | |
10dab226 JW |
2058 | SCpnt->result = 0; |
2059 | memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); | |
2060 | break; | |
c98a0eb0 MP |
2061 | case ABORTED_COMMAND: |
2062 | if (sshdr.asc == 0x10) /* DIF: Target detected corruption */ | |
2063 | good_bytes = sd_completed_bytes(SCpnt); | |
2064 | break; | |
2065 | case ILLEGAL_REQUEST: | |
d227ec26 CH |
2066 | switch (sshdr.asc) { |
2067 | case 0x10: /* DIX: Host detected corruption */ | |
af55ff67 | 2068 | good_bytes = sd_completed_bytes(SCpnt); |
d227ec26 CH |
2069 | break; |
2070 | case 0x20: /* INVALID COMMAND OPCODE */ | |
2071 | case 0x24: /* INVALID FIELD IN CDB */ | |
2072 | switch (SCpnt->cmnd[0]) { | |
5db44863 MP |
2073 | case UNMAP: |
2074 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
2075 | break; | |
2076 | case WRITE_SAME_16: | |
2077 | case WRITE_SAME: | |
d227ec26 | 2078 | if (SCpnt->cmnd[1] & 8) { /* UNMAP */ |
5db44863 | 2079 | sd_config_discard(sdkp, SD_LBP_DISABLE); |
d227ec26 | 2080 | } else { |
5db44863 MP |
2081 | sdkp->device->no_write_same = 1; |
2082 | sd_config_write_same(sdkp); | |
5db44863 | 2083 | req->__data_len = blk_rq_bytes(req); |
e8064021 | 2084 | req->rq_flags |= RQF_QUIET; |
5db44863 | 2085 | } |
d227ec26 | 2086 | break; |
5db44863 MP |
2087 | } |
2088 | } | |
03aba2f7 LT |
2089 | break; |
2090 | default: | |
2091 | break; | |
1da177e4 | 2092 | } |
89d94756 | 2093 | |
03aba2f7 | 2094 | out: |
89d94756 HR |
2095 | if (sd_is_zoned(sdkp)) |
2096 | sd_zbc_complete(SCpnt, good_bytes, &sshdr); | |
2097 | ||
ef61329d HR |
2098 | SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO, SCpnt, |
2099 | "sd_done: completed %d of %d bytes\n", | |
2100 | good_bytes, scsi_bufflen(SCpnt))); | |
2101 | ||
af55ff67 MP |
2102 | if (rq_data_dir(SCpnt->request) == READ && scsi_prot_sg_count(SCpnt)) |
2103 | sd_dif_complete(SCpnt, good_bytes); | |
2104 | ||
7b3d9545 | 2105 | return good_bytes; |
1da177e4 LT |
2106 | } |
2107 | ||
1da177e4 LT |
2108 | /* |
2109 | * spinup disk - called only in sd_revalidate_disk() | |
2110 | */ | |
2111 | static void | |
e73aec82 | 2112 | sd_spinup_disk(struct scsi_disk *sdkp) |
ea73a9f2 | 2113 | { |
1da177e4 | 2114 | unsigned char cmd[10]; |
4451e472 | 2115 | unsigned long spintime_expire = 0; |
1da177e4 LT |
2116 | int retries, spintime; |
2117 | unsigned int the_result; | |
2118 | struct scsi_sense_hdr sshdr; | |
2119 | int sense_valid = 0; | |
2120 | ||
2121 | spintime = 0; | |
2122 | ||
2123 | /* Spin up drives, as required. Only do this at boot time */ | |
2124 | /* Spinup needs to be done for module loads too. */ | |
2125 | do { | |
2126 | retries = 0; | |
2127 | ||
2128 | do { | |
2129 | cmd[0] = TEST_UNIT_READY; | |
2130 | memset((void *) &cmd[1], 0, 9); | |
2131 | ||
ea73a9f2 JB |
2132 | the_result = scsi_execute_req(sdkp->device, cmd, |
2133 | DMA_NONE, NULL, 0, | |
2134 | &sshdr, SD_TIMEOUT, | |
f4f4e47e | 2135 | SD_MAX_RETRIES, NULL); |
1da177e4 | 2136 | |
b4d38e38 AS |
2137 | /* |
2138 | * If the drive has indicated to us that it | |
2139 | * doesn't have any media in it, don't bother | |
2140 | * with any more polling. | |
2141 | */ | |
2142 | if (media_not_present(sdkp, &sshdr)) | |
2143 | return; | |
2144 | ||
1da177e4 | 2145 | if (the_result) |
ea73a9f2 | 2146 | sense_valid = scsi_sense_valid(&sshdr); |
1da177e4 LT |
2147 | retries++; |
2148 | } while (retries < 3 && | |
2149 | (!scsi_status_is_good(the_result) || | |
2150 | ((driver_byte(the_result) & DRIVER_SENSE) && | |
2151 | sense_valid && sshdr.sense_key == UNIT_ATTENTION))); | |
2152 | ||
1da177e4 LT |
2153 | if ((driver_byte(the_result) & DRIVER_SENSE) == 0) { |
2154 | /* no sense, TUR either succeeded or failed | |
2155 | * with a status error */ | |
e73aec82 | 2156 | if(!spintime && !scsi_status_is_good(the_result)) { |
ef61329d HR |
2157 | sd_print_result(sdkp, "Test Unit Ready failed", |
2158 | the_result); | |
e73aec82 | 2159 | } |
1da177e4 LT |
2160 | break; |
2161 | } | |
ef61329d | 2162 | |
1da177e4 LT |
2163 | /* |
2164 | * The device does not want the automatic start to be issued. | |
2165 | */ | |
33dd6f92 | 2166 | if (sdkp->device->no_start_on_add) |
1da177e4 | 2167 | break; |
1da177e4 | 2168 | |
33dd6f92 MW |
2169 | if (sense_valid && sshdr.sense_key == NOT_READY) { |
2170 | if (sshdr.asc == 4 && sshdr.ascq == 3) | |
2171 | break; /* manual intervention required */ | |
2172 | if (sshdr.asc == 4 && sshdr.ascq == 0xb) | |
2173 | break; /* standby */ | |
2174 | if (sshdr.asc == 4 && sshdr.ascq == 0xc) | |
2175 | break; /* unavailable */ | |
87af6779 MR |
2176 | if (sshdr.asc == 4 && sshdr.ascq == 0x1b) |
2177 | break; /* sanitize in progress */ | |
33dd6f92 MW |
2178 | /* |
2179 | * Issue command to spin up drive when not ready | |
2180 | */ | |
1da177e4 | 2181 | if (!spintime) { |
e73aec82 | 2182 | sd_printk(KERN_NOTICE, sdkp, "Spinning up disk..."); |
1da177e4 LT |
2183 | cmd[0] = START_STOP; |
2184 | cmd[1] = 1; /* Return immediately */ | |
2185 | memset((void *) &cmd[2], 0, 8); | |
2186 | cmd[4] = 1; /* Start spin cycle */ | |
d2886ea3 SR |
2187 | if (sdkp->device->start_stop_pwr_cond) |
2188 | cmd[4] |= 1 << 4; | |
ea73a9f2 JB |
2189 | scsi_execute_req(sdkp->device, cmd, DMA_NONE, |
2190 | NULL, 0, &sshdr, | |
f4f4e47e FT |
2191 | SD_TIMEOUT, SD_MAX_RETRIES, |
2192 | NULL); | |
4451e472 AS |
2193 | spintime_expire = jiffies + 100 * HZ; |
2194 | spintime = 1; | |
1da177e4 | 2195 | } |
1da177e4 LT |
2196 | /* Wait 1 second for next try */ |
2197 | msleep(1000); | |
2198 | printk("."); | |
4451e472 AS |
2199 | |
2200 | /* | |
2201 | * Wait for USB flash devices with slow firmware. | |
2202 | * Yes, this sense key/ASC combination shouldn't | |
2203 | * occur here. It's characteristic of these devices. | |
2204 | */ | |
2205 | } else if (sense_valid && | |
2206 | sshdr.sense_key == UNIT_ATTENTION && | |
2207 | sshdr.asc == 0x28) { | |
2208 | if (!spintime) { | |
2209 | spintime_expire = jiffies + 5 * HZ; | |
2210 | spintime = 1; | |
2211 | } | |
2212 | /* Wait 1 second for next try */ | |
2213 | msleep(1000); | |
1da177e4 LT |
2214 | } else { |
2215 | /* we don't understand the sense code, so it's | |
2216 | * probably pointless to loop */ | |
2217 | if(!spintime) { | |
e73aec82 MP |
2218 | sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n"); |
2219 | sd_print_sense_hdr(sdkp, &sshdr); | |
1da177e4 LT |
2220 | } |
2221 | break; | |
2222 | } | |
2223 | ||
4451e472 | 2224 | } while (spintime && time_before_eq(jiffies, spintime_expire)); |
1da177e4 LT |
2225 | |
2226 | if (spintime) { | |
2227 | if (scsi_status_is_good(the_result)) | |
2228 | printk("ready\n"); | |
2229 | else | |
2230 | printk("not responding...\n"); | |
2231 | } | |
2232 | } | |
2233 | ||
e0597d70 MP |
2234 | /* |
2235 | * Determine whether disk supports Data Integrity Field. | |
2236 | */ | |
fe542396 | 2237 | static int sd_read_protection_type(struct scsi_disk *sdkp, unsigned char *buffer) |
e0597d70 MP |
2238 | { |
2239 | struct scsi_device *sdp = sdkp->device; | |
2240 | u8 type; | |
fe542396 | 2241 | int ret = 0; |
e0597d70 | 2242 | |
f242b0e6 XC |
2243 | if (scsi_device_protection(sdp) == 0 || (buffer[12] & 1) == 0) { |
2244 | sdkp->protection_type = 0; | |
fe542396 | 2245 | return ret; |
f242b0e6 | 2246 | } |
35e1a5d9 MP |
2247 | |
2248 | type = ((buffer[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */ | |
2249 | ||
8475c811 | 2250 | if (type > T10_PI_TYPE3_PROTECTION) |
fe542396 MP |
2251 | ret = -ENODEV; |
2252 | else if (scsi_host_dif_capable(sdp->host, type)) | |
2253 | ret = 1; | |
2254 | ||
2255 | if (sdkp->first_scan || type != sdkp->protection_type) | |
2256 | switch (ret) { | |
2257 | case -ENODEV: | |
2258 | sd_printk(KERN_ERR, sdkp, "formatted with unsupported" \ | |
2259 | " protection type %u. Disabling disk!\n", | |
2260 | type); | |
2261 | break; | |
2262 | case 1: | |
2263 | sd_printk(KERN_NOTICE, sdkp, | |
2264 | "Enabling DIF Type %u protection\n", type); | |
2265 | break; | |
2266 | case 0: | |
2267 | sd_printk(KERN_NOTICE, sdkp, | |
2268 | "Disabling DIF Type %u protection\n", type); | |
2269 | break; | |
2270 | } | |
e0597d70 | 2271 | |
be922f47 MP |
2272 | sdkp->protection_type = type; |
2273 | ||
fe542396 | 2274 | return ret; |
e0597d70 MP |
2275 | } |
2276 | ||
0da205e0 MW |
2277 | static void read_capacity_error(struct scsi_disk *sdkp, struct scsi_device *sdp, |
2278 | struct scsi_sense_hdr *sshdr, int sense_valid, | |
2279 | int the_result) | |
2280 | { | |
0da205e0 MW |
2281 | if (driver_byte(the_result) & DRIVER_SENSE) |
2282 | sd_print_sense_hdr(sdkp, sshdr); | |
2283 | else | |
2284 | sd_printk(KERN_NOTICE, sdkp, "Sense not available.\n"); | |
2285 | ||
2286 | /* | |
2287 | * Set dirty bit for removable devices if not ready - | |
2288 | * sometimes drives will not report this properly. | |
2289 | */ | |
2290 | if (sdp->removable && | |
2291 | sense_valid && sshdr->sense_key == NOT_READY) | |
2bae0093 | 2292 | set_media_not_present(sdkp); |
0da205e0 MW |
2293 | |
2294 | /* | |
2295 | * We used to set media_present to 0 here to indicate no media | |
2296 | * in the drive, but some drives fail read capacity even with | |
2297 | * media present, so we can't do that. | |
2298 | */ | |
2299 | sdkp->capacity = 0; /* unknown mapped to zero - as usual */ | |
2300 | } | |
2301 | ||
2302 | #define RC16_LEN 32 | |
2303 | #if RC16_LEN > SD_BUF_SIZE | |
2304 | #error RC16_LEN must not be more than SD_BUF_SIZE | |
2305 | #endif | |
2306 | ||
3233ac19 JB |
2307 | #define READ_CAPACITY_RETRIES_ON_RESET 10 |
2308 | ||
7c856152 MP |
2309 | /* |
2310 | * Ensure that we don't overflow sector_t when CONFIG_LBDAF is not set | |
2311 | * and the reported logical block size is bigger than 512 bytes. Note | |
2312 | * that last_sector is a u64 and therefore logical_to_sectors() is not | |
2313 | * applicable. | |
2314 | */ | |
2315 | static bool sd_addressable_capacity(u64 lba, unsigned int sector_size) | |
2316 | { | |
2317 | u64 last_sector = (lba + 1ULL) << (ilog2(sector_size) - 9); | |
2318 | ||
2319 | if (sizeof(sector_t) == 4 && last_sector > U32_MAX) | |
2320 | return false; | |
2321 | ||
2322 | return true; | |
2323 | } | |
2324 | ||
0da205e0 MW |
2325 | static int read_capacity_16(struct scsi_disk *sdkp, struct scsi_device *sdp, |
2326 | unsigned char *buffer) | |
ea73a9f2 | 2327 | { |
1da177e4 | 2328 | unsigned char cmd[16]; |
1da177e4 LT |
2329 | struct scsi_sense_hdr sshdr; |
2330 | int sense_valid = 0; | |
0da205e0 | 2331 | int the_result; |
3233ac19 | 2332 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
ea09bcc9 | 2333 | unsigned int alignment; |
0da205e0 MW |
2334 | unsigned long long lba; |
2335 | unsigned sector_size; | |
1da177e4 | 2336 | |
5ce524bd HG |
2337 | if (sdp->no_read_capacity_16) |
2338 | return -EINVAL; | |
2339 | ||
1da177e4 | 2340 | do { |
0da205e0 | 2341 | memset(cmd, 0, 16); |
eb846d9f | 2342 | cmd[0] = SERVICE_ACTION_IN_16; |
0da205e0 MW |
2343 | cmd[1] = SAI_READ_CAPACITY_16; |
2344 | cmd[13] = RC16_LEN; | |
2345 | memset(buffer, 0, RC16_LEN); | |
2346 | ||
ea73a9f2 | 2347 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, |
0da205e0 MW |
2348 | buffer, RC16_LEN, &sshdr, |
2349 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
1da177e4 | 2350 | |
ea73a9f2 | 2351 | if (media_not_present(sdkp, &sshdr)) |
0da205e0 | 2352 | return -ENODEV; |
1da177e4 | 2353 | |
2b301307 | 2354 | if (the_result) { |
ea73a9f2 | 2355 | sense_valid = scsi_sense_valid(&sshdr); |
2b301307 MW |
2356 | if (sense_valid && |
2357 | sshdr.sense_key == ILLEGAL_REQUEST && | |
2358 | (sshdr.asc == 0x20 || sshdr.asc == 0x24) && | |
2359 | sshdr.ascq == 0x00) | |
2360 | /* Invalid Command Operation Code or | |
2361 | * Invalid Field in CDB, just retry | |
2362 | * silently with RC10 */ | |
2363 | return -EINVAL; | |
3233ac19 JB |
2364 | if (sense_valid && |
2365 | sshdr.sense_key == UNIT_ATTENTION && | |
2366 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) | |
2367 | /* Device reset might occur several times, | |
2368 | * give it one more chance */ | |
2369 | if (--reset_retries > 0) | |
2370 | continue; | |
2b301307 | 2371 | } |
1da177e4 LT |
2372 | retries--; |
2373 | ||
2374 | } while (the_result && retries); | |
2375 | ||
0da205e0 | 2376 | if (the_result) { |
ef61329d | 2377 | sd_print_result(sdkp, "Read Capacity(16) failed", the_result); |
0da205e0 MW |
2378 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); |
2379 | return -EINVAL; | |
2380 | } | |
e73aec82 | 2381 | |
8f76d151 DH |
2382 | sector_size = get_unaligned_be32(&buffer[8]); |
2383 | lba = get_unaligned_be64(&buffer[0]); | |
0da205e0 | 2384 | |
fe542396 MP |
2385 | if (sd_read_protection_type(sdkp, buffer) < 0) { |
2386 | sdkp->capacity = 0; | |
2387 | return -ENODEV; | |
2388 | } | |
0da205e0 | 2389 | |
7c856152 | 2390 | if (!sd_addressable_capacity(lba, sector_size)) { |
0da205e0 MW |
2391 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a " |
2392 | "kernel compiled with support for large block " | |
2393 | "devices.\n"); | |
2394 | sdkp->capacity = 0; | |
2395 | return -EOVERFLOW; | |
2396 | } | |
2397 | ||
ea09bcc9 | 2398 | /* Logical blocks per physical block exponent */ |
526f7c79 | 2399 | sdkp->physical_block_size = (1 << (buffer[13] & 0xf)) * sector_size; |
ea09bcc9 | 2400 | |
89d94756 HR |
2401 | /* RC basis */ |
2402 | sdkp->rc_basis = (buffer[12] >> 4) & 0x3; | |
2403 | ||
ea09bcc9 MP |
2404 | /* Lowest aligned logical block */ |
2405 | alignment = ((buffer[14] & 0x3f) << 8 | buffer[15]) * sector_size; | |
2406 | blk_queue_alignment_offset(sdp->request_queue, alignment); | |
2407 | if (alignment && sdkp->first_scan) | |
2408 | sd_printk(KERN_NOTICE, sdkp, | |
2409 | "physical block alignment offset: %u\n", alignment); | |
2410 | ||
c98a0eb0 MP |
2411 | if (buffer[14] & 0x80) { /* LBPME */ |
2412 | sdkp->lbpme = 1; | |
e339c1a7 | 2413 | |
c98a0eb0 MP |
2414 | if (buffer[14] & 0x40) /* LBPRZ */ |
2415 | sdkp->lbprz = 1; | |
e339c1a7 | 2416 | |
c98a0eb0 | 2417 | sd_config_discard(sdkp, SD_LBP_WS16); |
e339c1a7 MP |
2418 | } |
2419 | ||
0da205e0 MW |
2420 | sdkp->capacity = lba + 1; |
2421 | return sector_size; | |
2422 | } | |
2423 | ||
2424 | static int read_capacity_10(struct scsi_disk *sdkp, struct scsi_device *sdp, | |
2425 | unsigned char *buffer) | |
2426 | { | |
2427 | unsigned char cmd[16]; | |
2428 | struct scsi_sense_hdr sshdr; | |
2429 | int sense_valid = 0; | |
2430 | int the_result; | |
3233ac19 | 2431 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
0da205e0 MW |
2432 | sector_t lba; |
2433 | unsigned sector_size; | |
2434 | ||
2435 | do { | |
2436 | cmd[0] = READ_CAPACITY; | |
2437 | memset(&cmd[1], 0, 9); | |
2438 | memset(buffer, 0, 8); | |
2439 | ||
2440 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, | |
2441 | buffer, 8, &sshdr, | |
2442 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
2443 | ||
2444 | if (media_not_present(sdkp, &sshdr)) | |
2445 | return -ENODEV; | |
2446 | ||
3233ac19 | 2447 | if (the_result) { |
0da205e0 | 2448 | sense_valid = scsi_sense_valid(&sshdr); |
3233ac19 JB |
2449 | if (sense_valid && |
2450 | sshdr.sense_key == UNIT_ATTENTION && | |
2451 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) | |
2452 | /* Device reset might occur several times, | |
2453 | * give it one more chance */ | |
2454 | if (--reset_retries > 0) | |
2455 | continue; | |
2456 | } | |
0da205e0 MW |
2457 | retries--; |
2458 | ||
2459 | } while (the_result && retries); | |
2460 | ||
2461 | if (the_result) { | |
ef61329d | 2462 | sd_print_result(sdkp, "Read Capacity(10) failed", the_result); |
0da205e0 MW |
2463 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); |
2464 | return -EINVAL; | |
2465 | } | |
2466 | ||
8f76d151 DH |
2467 | sector_size = get_unaligned_be32(&buffer[4]); |
2468 | lba = get_unaligned_be32(&buffer[0]); | |
0da205e0 | 2469 | |
5ce524bd HG |
2470 | if (sdp->no_read_capacity_16 && (lba == 0xffffffff)) { |
2471 | /* Some buggy (usb cardreader) devices return an lba of | |
2472 | 0xffffffff when the want to report a size of 0 (with | |
2473 | which they really mean no media is present) */ | |
2474 | sdkp->capacity = 0; | |
5cc10350 | 2475 | sdkp->physical_block_size = sector_size; |
5ce524bd HG |
2476 | return sector_size; |
2477 | } | |
2478 | ||
7c856152 | 2479 | if (!sd_addressable_capacity(lba, sector_size)) { |
0da205e0 MW |
2480 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a " |
2481 | "kernel compiled with support for large block " | |
2482 | "devices.\n"); | |
2483 | sdkp->capacity = 0; | |
2484 | return -EOVERFLOW; | |
2485 | } | |
2486 | ||
2487 | sdkp->capacity = lba + 1; | |
526f7c79 | 2488 | sdkp->physical_block_size = sector_size; |
0da205e0 MW |
2489 | return sector_size; |
2490 | } | |
2491 | ||
2b301307 MW |
2492 | static int sd_try_rc16_first(struct scsi_device *sdp) |
2493 | { | |
f87146bb HR |
2494 | if (sdp->host->max_cmd_len < 16) |
2495 | return 0; | |
6a0bdffa AS |
2496 | if (sdp->try_rc_10_first) |
2497 | return 0; | |
2b301307 MW |
2498 | if (sdp->scsi_level > SCSI_SPC_2) |
2499 | return 1; | |
2500 | if (scsi_device_protection(sdp)) | |
2501 | return 1; | |
2502 | return 0; | |
2503 | } | |
2504 | ||
0da205e0 MW |
2505 | /* |
2506 | * read disk capacity | |
2507 | */ | |
2508 | static void | |
2509 | sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer) | |
2510 | { | |
2511 | int sector_size; | |
2512 | struct scsi_device *sdp = sdkp->device; | |
2513 | ||
2b301307 | 2514 | if (sd_try_rc16_first(sdp)) { |
0da205e0 MW |
2515 | sector_size = read_capacity_16(sdkp, sdp, buffer); |
2516 | if (sector_size == -EOVERFLOW) | |
1da177e4 | 2517 | goto got_data; |
2b301307 MW |
2518 | if (sector_size == -ENODEV) |
2519 | return; | |
2520 | if (sector_size < 0) | |
2521 | sector_size = read_capacity_10(sdkp, sdp, buffer); | |
0da205e0 MW |
2522 | if (sector_size < 0) |
2523 | return; | |
1da177e4 | 2524 | } else { |
0da205e0 MW |
2525 | sector_size = read_capacity_10(sdkp, sdp, buffer); |
2526 | if (sector_size == -EOVERFLOW) | |
2527 | goto got_data; | |
2528 | if (sector_size < 0) | |
2529 | return; | |
2530 | if ((sizeof(sdkp->capacity) > 4) && | |
2531 | (sdkp->capacity > 0xffffffffULL)) { | |
2532 | int old_sector_size = sector_size; | |
2533 | sd_printk(KERN_NOTICE, sdkp, "Very big device. " | |
2534 | "Trying to use READ CAPACITY(16).\n"); | |
2535 | sector_size = read_capacity_16(sdkp, sdp, buffer); | |
2536 | if (sector_size < 0) { | |
2537 | sd_printk(KERN_NOTICE, sdkp, | |
2538 | "Using 0xffffffff as device size\n"); | |
2539 | sdkp->capacity = 1 + (sector_t) 0xffffffff; | |
2540 | sector_size = old_sector_size; | |
2541 | goto got_data; | |
2542 | } | |
4c917fe4 MP |
2543 | /* Remember that READ CAPACITY(16) succeeded */ |
2544 | sdp->try_rc_10_first = 0; | |
0da205e0 MW |
2545 | } |
2546 | } | |
1da177e4 | 2547 | |
5c211caa AS |
2548 | /* Some devices are known to return the total number of blocks, |
2549 | * not the highest block number. Some devices have versions | |
2550 | * which do this and others which do not. Some devices we might | |
2551 | * suspect of doing this but we don't know for certain. | |
2552 | * | |
2553 | * If we know the reported capacity is wrong, decrement it. If | |
2554 | * we can only guess, then assume the number of blocks is even | |
2555 | * (usually true but not always) and err on the side of lowering | |
2556 | * the capacity. | |
2557 | */ | |
2558 | if (sdp->fix_capacity || | |
2559 | (sdp->guess_capacity && (sdkp->capacity & 0x01))) { | |
2560 | sd_printk(KERN_INFO, sdkp, "Adjusting the sector count " | |
2561 | "from its reported value: %llu\n", | |
2562 | (unsigned long long) sdkp->capacity); | |
1da177e4 | 2563 | --sdkp->capacity; |
61bf54b7 ON |
2564 | } |
2565 | ||
1da177e4 LT |
2566 | got_data: |
2567 | if (sector_size == 0) { | |
2568 | sector_size = 512; | |
e73aec82 MP |
2569 | sd_printk(KERN_NOTICE, sdkp, "Sector size 0 reported, " |
2570 | "assuming 512.\n"); | |
1da177e4 LT |
2571 | } |
2572 | ||
2573 | if (sector_size != 512 && | |
2574 | sector_size != 1024 && | |
2575 | sector_size != 2048 && | |
74856fbf | 2576 | sector_size != 4096) { |
e73aec82 MP |
2577 | sd_printk(KERN_NOTICE, sdkp, "Unsupported sector size %d.\n", |
2578 | sector_size); | |
1da177e4 LT |
2579 | /* |
2580 | * The user might want to re-format the drive with | |
2581 | * a supported sectorsize. Once this happens, it | |
2582 | * would be relatively trivial to set the thing up. | |
2583 | * For this reason, we leave the thing in the table. | |
2584 | */ | |
2585 | sdkp->capacity = 0; | |
2586 | /* | |
2587 | * set a bogus sector size so the normal read/write | |
2588 | * logic in the block layer will eventually refuse any | |
2589 | * request on this device without tripping over power | |
2590 | * of two sector size assumptions | |
2591 | */ | |
2592 | sector_size = 512; | |
2593 | } | |
e1defc4f | 2594 | blk_queue_logical_block_size(sdp->request_queue, sector_size); |
89d94756 HR |
2595 | blk_queue_physical_block_size(sdp->request_queue, |
2596 | sdkp->physical_block_size); | |
2597 | sdkp->device->sector_size = sector_size; | |
7404ad3b | 2598 | |
89d94756 HR |
2599 | if (sdkp->capacity > 0xffffffff) |
2600 | sdp->use_16_for_rw = 1; | |
1da177e4 | 2601 | |
89d94756 | 2602 | } |
1da177e4 | 2603 | |
89d94756 HR |
2604 | /* |
2605 | * Print disk capacity | |
2606 | */ | |
2607 | static void | |
2608 | sd_print_capacity(struct scsi_disk *sdkp, | |
2609 | sector_t old_capacity) | |
2610 | { | |
2611 | int sector_size = sdkp->device->sector_size; | |
2612 | char cap_str_2[10], cap_str_10[10]; | |
ea09bcc9 | 2613 | |
89d94756 HR |
2614 | string_get_size(sdkp->capacity, sector_size, |
2615 | STRING_UNITS_2, cap_str_2, sizeof(cap_str_2)); | |
2616 | string_get_size(sdkp->capacity, sector_size, | |
2617 | STRING_UNITS_10, cap_str_10, | |
2618 | sizeof(cap_str_10)); | |
1da177e4 | 2619 | |
89d94756 HR |
2620 | if (sdkp->first_scan || old_capacity != sdkp->capacity) { |
2621 | sd_printk(KERN_NOTICE, sdkp, | |
2622 | "%llu %d-byte logical blocks: (%s/%s)\n", | |
2623 | (unsigned long long)sdkp->capacity, | |
2624 | sector_size, cap_str_10, cap_str_2); | |
53ad570b | 2625 | |
89d94756 HR |
2626 | if (sdkp->physical_block_size != sector_size) |
2627 | sd_printk(KERN_NOTICE, sdkp, | |
2628 | "%u-byte physical blocks\n", | |
2629 | sdkp->physical_block_size); | |
2630 | ||
2631 | sd_zbc_print_zones(sdkp); | |
2632 | } | |
1da177e4 LT |
2633 | } |
2634 | ||
2635 | /* called with buffer of length 512 */ | |
2636 | static inline int | |
ea73a9f2 JB |
2637 | sd_do_mode_sense(struct scsi_device *sdp, int dbd, int modepage, |
2638 | unsigned char *buffer, int len, struct scsi_mode_data *data, | |
2639 | struct scsi_sense_hdr *sshdr) | |
1da177e4 | 2640 | { |
ea73a9f2 | 2641 | return scsi_mode_sense(sdp, dbd, modepage, buffer, len, |
1cf72699 | 2642 | SD_TIMEOUT, SD_MAX_RETRIES, data, |
ea73a9f2 | 2643 | sshdr); |
1da177e4 LT |
2644 | } |
2645 | ||
2646 | /* | |
2647 | * read write protect setting, if possible - called only in sd_revalidate_disk() | |
48970800 | 2648 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
2649 | */ |
2650 | static void | |
e73aec82 | 2651 | sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer) |
ea73a9f2 | 2652 | { |
1da177e4 | 2653 | int res; |
ea73a9f2 | 2654 | struct scsi_device *sdp = sdkp->device; |
1da177e4 | 2655 | struct scsi_mode_data data; |
70a9b873 | 2656 | int old_wp = sdkp->write_prot; |
1da177e4 LT |
2657 | |
2658 | set_disk_ro(sdkp->disk, 0); | |
ea73a9f2 | 2659 | if (sdp->skip_ms_page_3f) { |
b2bff6ce | 2660 | sd_first_printk(KERN_NOTICE, sdkp, "Assuming Write Enabled\n"); |
1da177e4 LT |
2661 | return; |
2662 | } | |
2663 | ||
ea73a9f2 JB |
2664 | if (sdp->use_192_bytes_for_3f) { |
2665 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 192, &data, NULL); | |
1da177e4 LT |
2666 | } else { |
2667 | /* | |
2668 | * First attempt: ask for all pages (0x3F), but only 4 bytes. | |
2669 | * We have to start carefully: some devices hang if we ask | |
2670 | * for more than is available. | |
2671 | */ | |
ea73a9f2 | 2672 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 4, &data, NULL); |
1da177e4 LT |
2673 | |
2674 | /* | |
2675 | * Second attempt: ask for page 0 When only page 0 is | |
2676 | * implemented, a request for page 3F may return Sense Key | |
2677 | * 5: Illegal Request, Sense Code 24: Invalid field in | |
2678 | * CDB. | |
2679 | */ | |
2680 | if (!scsi_status_is_good(res)) | |
ea73a9f2 | 2681 | res = sd_do_mode_sense(sdp, 0, 0, buffer, 4, &data, NULL); |
1da177e4 LT |
2682 | |
2683 | /* | |
2684 | * Third attempt: ask 255 bytes, as we did earlier. | |
2685 | */ | |
2686 | if (!scsi_status_is_good(res)) | |
ea73a9f2 JB |
2687 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 255, |
2688 | &data, NULL); | |
1da177e4 LT |
2689 | } |
2690 | ||
2691 | if (!scsi_status_is_good(res)) { | |
b2bff6ce | 2692 | sd_first_printk(KERN_WARNING, sdkp, |
e73aec82 | 2693 | "Test WP failed, assume Write Enabled\n"); |
1da177e4 LT |
2694 | } else { |
2695 | sdkp->write_prot = ((data.device_specific & 0x80) != 0); | |
7681dd8c | 2696 | set_disk_ro(sdkp->disk, sdkp->write_prot); |
70a9b873 MP |
2697 | if (sdkp->first_scan || old_wp != sdkp->write_prot) { |
2698 | sd_printk(KERN_NOTICE, sdkp, "Write Protect is %s\n", | |
2699 | sdkp->write_prot ? "on" : "off"); | |
df441cc0 | 2700 | sd_printk(KERN_DEBUG, sdkp, "Mode Sense: %4ph\n", buffer); |
70a9b873 | 2701 | } |
1da177e4 LT |
2702 | } |
2703 | } | |
2704 | ||
2705 | /* | |
2706 | * sd_read_cache_type - called only from sd_revalidate_disk() | |
48970800 | 2707 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
2708 | */ |
2709 | static void | |
e73aec82 | 2710 | sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer) |
631e8a13 | 2711 | { |
1da177e4 | 2712 | int len = 0, res; |
ea73a9f2 | 2713 | struct scsi_device *sdp = sdkp->device; |
1da177e4 | 2714 | |
631e8a13 AV |
2715 | int dbd; |
2716 | int modepage; | |
0bcaa111 | 2717 | int first_len; |
1da177e4 LT |
2718 | struct scsi_mode_data data; |
2719 | struct scsi_sense_hdr sshdr; | |
70a9b873 MP |
2720 | int old_wce = sdkp->WCE; |
2721 | int old_rcd = sdkp->RCD; | |
2722 | int old_dpofua = sdkp->DPOFUA; | |
1da177e4 | 2723 | |
39c60a09 JB |
2724 | |
2725 | if (sdkp->cache_override) | |
2726 | return; | |
2727 | ||
0bcaa111 LT |
2728 | first_len = 4; |
2729 | if (sdp->skip_ms_page_8) { | |
2730 | if (sdp->type == TYPE_RBC) | |
2731 | goto defaults; | |
2732 | else { | |
2733 | if (sdp->skip_ms_page_3f) | |
2734 | goto defaults; | |
2735 | modepage = 0x3F; | |
2736 | if (sdp->use_192_bytes_for_3f) | |
2737 | first_len = 192; | |
2738 | dbd = 0; | |
2739 | } | |
2740 | } else if (sdp->type == TYPE_RBC) { | |
631e8a13 AV |
2741 | modepage = 6; |
2742 | dbd = 8; | |
2743 | } else { | |
2744 | modepage = 8; | |
2745 | dbd = 0; | |
2746 | } | |
2747 | ||
1da177e4 | 2748 | /* cautiously ask */ |
0bcaa111 LT |
2749 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, first_len, |
2750 | &data, &sshdr); | |
1da177e4 LT |
2751 | |
2752 | if (!scsi_status_is_good(res)) | |
2753 | goto bad_sense; | |
2754 | ||
6d73c851 AV |
2755 | if (!data.header_length) { |
2756 | modepage = 6; | |
0bcaa111 | 2757 | first_len = 0; |
b2bff6ce MP |
2758 | sd_first_printk(KERN_ERR, sdkp, |
2759 | "Missing header in MODE_SENSE response\n"); | |
6d73c851 AV |
2760 | } |
2761 | ||
1da177e4 LT |
2762 | /* that went OK, now ask for the proper length */ |
2763 | len = data.length; | |
2764 | ||
2765 | /* | |
2766 | * We're only interested in the first three bytes, actually. | |
2767 | * But the data cache page is defined for the first 20. | |
2768 | */ | |
2769 | if (len < 3) | |
2770 | goto bad_sense; | |
0bcaa111 | 2771 | else if (len > SD_BUF_SIZE) { |
b2bff6ce | 2772 | sd_first_printk(KERN_NOTICE, sdkp, "Truncating mode parameter " |
0bcaa111 LT |
2773 | "data from %d to %d bytes\n", len, SD_BUF_SIZE); |
2774 | len = SD_BUF_SIZE; | |
2775 | } | |
2776 | if (modepage == 0x3F && sdp->use_192_bytes_for_3f) | |
2777 | len = 192; | |
1da177e4 LT |
2778 | |
2779 | /* Get the data */ | |
0bcaa111 LT |
2780 | if (len > first_len) |
2781 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, len, | |
2782 | &data, &sshdr); | |
1da177e4 LT |
2783 | |
2784 | if (scsi_status_is_good(res)) { | |
631e8a13 | 2785 | int offset = data.header_length + data.block_descriptor_length; |
1da177e4 | 2786 | |
0bcaa111 LT |
2787 | while (offset < len) { |
2788 | u8 page_code = buffer[offset] & 0x3F; | |
2789 | u8 spf = buffer[offset] & 0x40; | |
2790 | ||
2791 | if (page_code == 8 || page_code == 6) { | |
2792 | /* We're interested only in the first 3 bytes. | |
2793 | */ | |
2794 | if (len - offset <= 2) { | |
b2bff6ce MP |
2795 | sd_first_printk(KERN_ERR, sdkp, |
2796 | "Incomplete mode parameter " | |
2797 | "data\n"); | |
0bcaa111 LT |
2798 | goto defaults; |
2799 | } else { | |
2800 | modepage = page_code; | |
2801 | goto Page_found; | |
2802 | } | |
2803 | } else { | |
2804 | /* Go to the next page */ | |
2805 | if (spf && len - offset > 3) | |
2806 | offset += 4 + (buffer[offset+2] << 8) + | |
2807 | buffer[offset+3]; | |
2808 | else if (!spf && len - offset > 1) | |
2809 | offset += 2 + buffer[offset+1]; | |
2810 | else { | |
b2bff6ce MP |
2811 | sd_first_printk(KERN_ERR, sdkp, |
2812 | "Incomplete mode " | |
2813 | "parameter data\n"); | |
0bcaa111 LT |
2814 | goto defaults; |
2815 | } | |
2816 | } | |
48970800 AV |
2817 | } |
2818 | ||
b2bff6ce | 2819 | sd_first_printk(KERN_ERR, sdkp, "No Caching mode page found\n"); |
984f1733 AS |
2820 | goto defaults; |
2821 | ||
0bcaa111 | 2822 | Page_found: |
631e8a13 AV |
2823 | if (modepage == 8) { |
2824 | sdkp->WCE = ((buffer[offset + 2] & 0x04) != 0); | |
2825 | sdkp->RCD = ((buffer[offset + 2] & 0x01) != 0); | |
2826 | } else { | |
2827 | sdkp->WCE = ((buffer[offset + 2] & 0x01) == 0); | |
2828 | sdkp->RCD = 0; | |
2829 | } | |
1da177e4 | 2830 | |
007365ad | 2831 | sdkp->DPOFUA = (data.device_specific & 0x10) != 0; |
b14bf2d0 AS |
2832 | if (sdp->broken_fua) { |
2833 | sd_first_printk(KERN_NOTICE, sdkp, "Disabling FUA\n"); | |
2834 | sdkp->DPOFUA = 0; | |
26f28197 DLM |
2835 | } else if (sdkp->DPOFUA && !sdkp->device->use_10_for_rw && |
2836 | !sdkp->device->use_16_for_rw) { | |
b2bff6ce | 2837 | sd_first_printk(KERN_NOTICE, sdkp, |
e73aec82 | 2838 | "Uses READ/WRITE(6), disabling FUA\n"); |
007365ad TH |
2839 | sdkp->DPOFUA = 0; |
2840 | } | |
2841 | ||
2eefd57b SRT |
2842 | /* No cache flush allowed for write protected devices */ |
2843 | if (sdkp->WCE && sdkp->write_prot) | |
2844 | sdkp->WCE = 0; | |
2845 | ||
70a9b873 MP |
2846 | if (sdkp->first_scan || old_wce != sdkp->WCE || |
2847 | old_rcd != sdkp->RCD || old_dpofua != sdkp->DPOFUA) | |
2848 | sd_printk(KERN_NOTICE, sdkp, | |
2849 | "Write cache: %s, read cache: %s, %s\n", | |
2850 | sdkp->WCE ? "enabled" : "disabled", | |
2851 | sdkp->RCD ? "disabled" : "enabled", | |
2852 | sdkp->DPOFUA ? "supports DPO and FUA" | |
2853 | : "doesn't support DPO or FUA"); | |
1da177e4 LT |
2854 | |
2855 | return; | |
2856 | } | |
2857 | ||
2858 | bad_sense: | |
ea73a9f2 | 2859 | if (scsi_sense_valid(&sshdr) && |
1da177e4 LT |
2860 | sshdr.sense_key == ILLEGAL_REQUEST && |
2861 | sshdr.asc == 0x24 && sshdr.ascq == 0x0) | |
e73aec82 | 2862 | /* Invalid field in CDB */ |
b2bff6ce | 2863 | sd_first_printk(KERN_NOTICE, sdkp, "Cache data unavailable\n"); |
1da177e4 | 2864 | else |
b2bff6ce MP |
2865 | sd_first_printk(KERN_ERR, sdkp, |
2866 | "Asking for cache data failed\n"); | |
1da177e4 LT |
2867 | |
2868 | defaults: | |
b81478d8 | 2869 | if (sdp->wce_default_on) { |
b2bff6ce MP |
2870 | sd_first_printk(KERN_NOTICE, sdkp, |
2871 | "Assuming drive cache: write back\n"); | |
b81478d8 NJ |
2872 | sdkp->WCE = 1; |
2873 | } else { | |
b2bff6ce MP |
2874 | sd_first_printk(KERN_ERR, sdkp, |
2875 | "Assuming drive cache: write through\n"); | |
b81478d8 NJ |
2876 | sdkp->WCE = 0; |
2877 | } | |
1da177e4 | 2878 | sdkp->RCD = 0; |
48970800 | 2879 | sdkp->DPOFUA = 0; |
1da177e4 LT |
2880 | } |
2881 | ||
e0597d70 MP |
2882 | /* |
2883 | * The ATO bit indicates whether the DIF application tag is available | |
2884 | * for use by the operating system. | |
2885 | */ | |
439d77f7 | 2886 | static void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer) |
e0597d70 MP |
2887 | { |
2888 | int res, offset; | |
2889 | struct scsi_device *sdp = sdkp->device; | |
2890 | struct scsi_mode_data data; | |
2891 | struct scsi_sense_hdr sshdr; | |
2892 | ||
89d94756 | 2893 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) |
e0597d70 MP |
2894 | return; |
2895 | ||
2896 | if (sdkp->protection_type == 0) | |
2897 | return; | |
2898 | ||
2899 | res = scsi_mode_sense(sdp, 1, 0x0a, buffer, 36, SD_TIMEOUT, | |
2900 | SD_MAX_RETRIES, &data, &sshdr); | |
2901 | ||
2902 | if (!scsi_status_is_good(res) || !data.header_length || | |
2903 | data.length < 6) { | |
b2bff6ce | 2904 | sd_first_printk(KERN_WARNING, sdkp, |
e0597d70 MP |
2905 | "getting Control mode page failed, assume no ATO\n"); |
2906 | ||
2907 | if (scsi_sense_valid(&sshdr)) | |
2908 | sd_print_sense_hdr(sdkp, &sshdr); | |
2909 | ||
2910 | return; | |
2911 | } | |
2912 | ||
2913 | offset = data.header_length + data.block_descriptor_length; | |
2914 | ||
2915 | if ((buffer[offset] & 0x3f) != 0x0a) { | |
b2bff6ce | 2916 | sd_first_printk(KERN_ERR, sdkp, "ATO Got wrong page\n"); |
e0597d70 MP |
2917 | return; |
2918 | } | |
2919 | ||
2920 | if ((buffer[offset + 5] & 0x80) == 0) | |
2921 | return; | |
2922 | ||
2923 | sdkp->ATO = 1; | |
2924 | ||
2925 | return; | |
2926 | } | |
2927 | ||
d11b6916 MP |
2928 | /** |
2929 | * sd_read_block_limits - Query disk device for preferred I/O sizes. | |
7529fbb0 | 2930 | * @sdkp: disk to query |
d11b6916 MP |
2931 | */ |
2932 | static void sd_read_block_limits(struct scsi_disk *sdkp) | |
2933 | { | |
2934 | unsigned int sector_sz = sdkp->device->sector_size; | |
bb2d3de1 | 2935 | const int vpd_len = 64; |
e3deec09 | 2936 | unsigned char *buffer = kmalloc(vpd_len, GFP_KERNEL); |
d11b6916 | 2937 | |
e3deec09 JB |
2938 | if (!buffer || |
2939 | /* Block Limits VPD */ | |
2940 | scsi_get_vpd_page(sdkp->device, 0xb0, buffer, vpd_len)) | |
2941 | goto out; | |
d11b6916 MP |
2942 | |
2943 | blk_queue_io_min(sdkp->disk->queue, | |
2944 | get_unaligned_be16(&buffer[6]) * sector_sz); | |
ca369d51 MP |
2945 | |
2946 | sdkp->max_xfer_blocks = get_unaligned_be32(&buffer[8]); | |
2947 | sdkp->opt_xfer_blocks = get_unaligned_be32(&buffer[12]); | |
d11b6916 | 2948 | |
c98a0eb0 MP |
2949 | if (buffer[3] == 0x3c) { |
2950 | unsigned int lba_count, desc_count; | |
e339c1a7 | 2951 | |
5db44863 | 2952 | sdkp->max_ws_blocks = (u32)get_unaligned_be64(&buffer[36]); |
e339c1a7 | 2953 | |
c98a0eb0 | 2954 | if (!sdkp->lbpme) |
045d3fe7 | 2955 | goto out; |
045d3fe7 | 2956 | |
c98a0eb0 MP |
2957 | lba_count = get_unaligned_be32(&buffer[20]); |
2958 | desc_count = get_unaligned_be32(&buffer[24]); | |
045d3fe7 | 2959 | |
c98a0eb0 MP |
2960 | if (lba_count && desc_count) |
2961 | sdkp->max_unmap_blocks = lba_count; | |
e339c1a7 | 2962 | |
c98a0eb0 | 2963 | sdkp->unmap_granularity = get_unaligned_be32(&buffer[28]); |
e339c1a7 MP |
2964 | |
2965 | if (buffer[32] & 0x80) | |
c98a0eb0 | 2966 | sdkp->unmap_alignment = |
e339c1a7 | 2967 | get_unaligned_be32(&buffer[32]) & ~(1 << 31); |
c98a0eb0 MP |
2968 | |
2969 | if (!sdkp->lbpvpd) { /* LBP VPD page not provided */ | |
2970 | ||
2971 | if (sdkp->max_unmap_blocks) | |
2972 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
2973 | else | |
2974 | sd_config_discard(sdkp, SD_LBP_WS16); | |
2975 | ||
2976 | } else { /* LBP VPD page tells us what to use */ | |
bcd069bb | 2977 | if (sdkp->lbpu && sdkp->max_unmap_blocks) |
e461338b MP |
2978 | sd_config_discard(sdkp, SD_LBP_UNMAP); |
2979 | else if (sdkp->lbpws) | |
c98a0eb0 MP |
2980 | sd_config_discard(sdkp, SD_LBP_WS16); |
2981 | else if (sdkp->lbpws10) | |
2982 | sd_config_discard(sdkp, SD_LBP_WS10); | |
2983 | else | |
2984 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
2985 | } | |
e339c1a7 MP |
2986 | } |
2987 | ||
e3deec09 | 2988 | out: |
d11b6916 MP |
2989 | kfree(buffer); |
2990 | } | |
2991 | ||
3821d768 MP |
2992 | /** |
2993 | * sd_read_block_characteristics - Query block dev. characteristics | |
7529fbb0 | 2994 | * @sdkp: disk to query |
3821d768 MP |
2995 | */ |
2996 | static void sd_read_block_characteristics(struct scsi_disk *sdkp) | |
2997 | { | |
89d94756 | 2998 | struct request_queue *q = sdkp->disk->queue; |
e3deec09 | 2999 | unsigned char *buffer; |
3821d768 | 3000 | u16 rot; |
bb2d3de1 | 3001 | const int vpd_len = 64; |
3821d768 | 3002 | |
e3deec09 | 3003 | buffer = kmalloc(vpd_len, GFP_KERNEL); |
3821d768 | 3004 | |
e3deec09 JB |
3005 | if (!buffer || |
3006 | /* Block Device Characteristics VPD */ | |
3007 | scsi_get_vpd_page(sdkp->device, 0xb1, buffer, vpd_len)) | |
3008 | goto out; | |
3821d768 MP |
3009 | |
3010 | rot = get_unaligned_be16(&buffer[4]); | |
3011 | ||
b277da0a | 3012 | if (rot == 1) { |
89d94756 HR |
3013 | queue_flag_set_unlocked(QUEUE_FLAG_NONROT, q); |
3014 | queue_flag_clear_unlocked(QUEUE_FLAG_ADD_RANDOM, q); | |
b277da0a | 3015 | } |
3821d768 | 3016 | |
68af412c DLM |
3017 | if (sdkp->device->type == TYPE_ZBC) { |
3018 | /* Host-managed */ | |
89d94756 | 3019 | q->limits.zoned = BLK_ZONED_HM; |
68af412c DLM |
3020 | } else { |
3021 | sdkp->zoned = (buffer[8] >> 4) & 3; | |
3022 | if (sdkp->zoned == 1) | |
3023 | /* Host-aware */ | |
3024 | q->limits.zoned = BLK_ZONED_HA; | |
3025 | else | |
3026 | /* | |
3027 | * Treat drive-managed devices as | |
3028 | * regular block devices. | |
3029 | */ | |
3030 | q->limits.zoned = BLK_ZONED_NONE; | |
3031 | } | |
89d94756 HR |
3032 | if (blk_queue_is_zoned(q) && sdkp->first_scan) |
3033 | sd_printk(KERN_NOTICE, sdkp, "Host-%s zoned block device\n", | |
3034 | q->limits.zoned == BLK_ZONED_HM ? "managed" : "aware"); | |
3035 | ||
e3deec09 | 3036 | out: |
3821d768 MP |
3037 | kfree(buffer); |
3038 | } | |
3039 | ||
045d3fe7 | 3040 | /** |
c98a0eb0 | 3041 | * sd_read_block_provisioning - Query provisioning VPD page |
7529fbb0 | 3042 | * @sdkp: disk to query |
045d3fe7 | 3043 | */ |
c98a0eb0 | 3044 | static void sd_read_block_provisioning(struct scsi_disk *sdkp) |
045d3fe7 MP |
3045 | { |
3046 | unsigned char *buffer; | |
3047 | const int vpd_len = 8; | |
3048 | ||
c98a0eb0 | 3049 | if (sdkp->lbpme == 0) |
045d3fe7 MP |
3050 | return; |
3051 | ||
3052 | buffer = kmalloc(vpd_len, GFP_KERNEL); | |
3053 | ||
3054 | if (!buffer || scsi_get_vpd_page(sdkp->device, 0xb2, buffer, vpd_len)) | |
3055 | goto out; | |
3056 | ||
c98a0eb0 MP |
3057 | sdkp->lbpvpd = 1; |
3058 | sdkp->lbpu = (buffer[5] >> 7) & 1; /* UNMAP */ | |
3059 | sdkp->lbpws = (buffer[5] >> 6) & 1; /* WRITE SAME(16) with UNMAP */ | |
3060 | sdkp->lbpws10 = (buffer[5] >> 5) & 1; /* WRITE SAME(10) with UNMAP */ | |
045d3fe7 MP |
3061 | |
3062 | out: | |
3063 | kfree(buffer); | |
3064 | } | |
3065 | ||
5db44863 MP |
3066 | static void sd_read_write_same(struct scsi_disk *sdkp, unsigned char *buffer) |
3067 | { | |
66c28f97 MP |
3068 | struct scsi_device *sdev = sdkp->device; |
3069 | ||
54b2b50c MP |
3070 | if (sdev->host->no_write_same) { |
3071 | sdev->no_write_same = 1; | |
3072 | ||
3073 | return; | |
3074 | } | |
3075 | ||
66c28f97 | 3076 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, INQUIRY) < 0) { |
af73623f BS |
3077 | /* too large values might cause issues with arcmsr */ |
3078 | int vpd_buf_len = 64; | |
3079 | ||
66c28f97 MP |
3080 | sdev->no_report_opcodes = 1; |
3081 | ||
3082 | /* Disable WRITE SAME if REPORT SUPPORTED OPERATION | |
3083 | * CODES is unsupported and the device has an ATA | |
3084 | * Information VPD page (SAT). | |
3085 | */ | |
af73623f | 3086 | if (!scsi_get_vpd_page(sdev, 0x89, buffer, vpd_buf_len)) |
66c28f97 MP |
3087 | sdev->no_write_same = 1; |
3088 | } | |
3089 | ||
3090 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME_16) == 1) | |
5db44863 | 3091 | sdkp->ws16 = 1; |
66c28f97 MP |
3092 | |
3093 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME) == 1) | |
3094 | sdkp->ws10 = 1; | |
5db44863 MP |
3095 | } |
3096 | ||
d80210f2 CH |
3097 | static void sd_read_security(struct scsi_disk *sdkp, unsigned char *buffer) |
3098 | { | |
3099 | struct scsi_device *sdev = sdkp->device; | |
3100 | ||
3101 | if (!sdev->security_supported) | |
3102 | return; | |
3103 | ||
3104 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, | |
3105 | SECURITY_PROTOCOL_IN) == 1 && | |
3106 | scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, | |
3107 | SECURITY_PROTOCOL_OUT) == 1) | |
3108 | sdkp->security = 1; | |
3109 | } | |
3110 | ||
6fe3b82d MP |
3111 | /* |
3112 | * Determine the device's preferred I/O size for reads and writes | |
3113 | * unless the reported value is unreasonably small, large, not a | |
3114 | * multiple of the physical block size, or simply garbage. | |
3115 | */ | |
3116 | static bool sd_validate_opt_xfer_size(struct scsi_disk *sdkp, | |
3117 | unsigned int dev_max) | |
3118 | { | |
3119 | struct scsi_device *sdp = sdkp->device; | |
3120 | unsigned int opt_xfer_bytes = | |
3121 | logical_to_bytes(sdp, sdkp->opt_xfer_blocks); | |
3122 | ||
55eff28f MP |
3123 | if (sdkp->opt_xfer_blocks == 0) |
3124 | return false; | |
3125 | ||
6fe3b82d MP |
3126 | if (sdkp->opt_xfer_blocks > dev_max) { |
3127 | sd_first_printk(KERN_WARNING, sdkp, | |
3128 | "Optimal transfer size %u logical blocks " \ | |
3129 | "> dev_max (%u logical blocks)\n", | |
3130 | sdkp->opt_xfer_blocks, dev_max); | |
3131 | return false; | |
3132 | } | |
3133 | ||
3134 | if (sdkp->opt_xfer_blocks > SD_DEF_XFER_BLOCKS) { | |
3135 | sd_first_printk(KERN_WARNING, sdkp, | |
3136 | "Optimal transfer size %u logical blocks " \ | |
3137 | "> sd driver limit (%u logical blocks)\n", | |
3138 | sdkp->opt_xfer_blocks, SD_DEF_XFER_BLOCKS); | |
3139 | return false; | |
3140 | } | |
3141 | ||
3142 | if (opt_xfer_bytes < PAGE_SIZE) { | |
3143 | sd_first_printk(KERN_WARNING, sdkp, | |
3144 | "Optimal transfer size %u bytes < " \ | |
3145 | "PAGE_SIZE (%u bytes)\n", | |
3146 | opt_xfer_bytes, (unsigned int)PAGE_SIZE); | |
3147 | return false; | |
3148 | } | |
3149 | ||
3150 | if (opt_xfer_bytes & (sdkp->physical_block_size - 1)) { | |
3151 | sd_first_printk(KERN_WARNING, sdkp, | |
3152 | "Optimal transfer size %u bytes not a " \ | |
3153 | "multiple of physical block size (%u bytes)\n", | |
3154 | opt_xfer_bytes, sdkp->physical_block_size); | |
3155 | return false; | |
3156 | } | |
3157 | ||
3158 | sd_first_printk(KERN_INFO, sdkp, "Optimal transfer size %u bytes\n", | |
3159 | opt_xfer_bytes); | |
3160 | return true; | |
3161 | } | |
3162 | ||
1da177e4 LT |
3163 | /** |
3164 | * sd_revalidate_disk - called the first time a new disk is seen, | |
3165 | * performs disk spin up, read_capacity, etc. | |
3166 | * @disk: struct gendisk we care about | |
3167 | **/ | |
3168 | static int sd_revalidate_disk(struct gendisk *disk) | |
3169 | { | |
3170 | struct scsi_disk *sdkp = scsi_disk(disk); | |
3171 | struct scsi_device *sdp = sdkp->device; | |
ca369d51 | 3172 | struct request_queue *q = sdkp->disk->queue; |
89d94756 | 3173 | sector_t old_capacity = sdkp->capacity; |
1da177e4 | 3174 | unsigned char *buffer; |
ca369d51 | 3175 | unsigned int dev_max, rw_max; |
1da177e4 | 3176 | |
fa0d34be MP |
3177 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, |
3178 | "sd_revalidate_disk\n")); | |
1da177e4 LT |
3179 | |
3180 | /* | |
3181 | * If the device is offline, don't try and read capacity or any | |
3182 | * of the other niceties. | |
3183 | */ | |
3184 | if (!scsi_device_online(sdp)) | |
3185 | goto out; | |
3186 | ||
a6123f14 | 3187 | buffer = kmalloc(SD_BUF_SIZE, GFP_KERNEL); |
1da177e4 | 3188 | if (!buffer) { |
e73aec82 MP |
3189 | sd_printk(KERN_WARNING, sdkp, "sd_revalidate_disk: Memory " |
3190 | "allocation failure.\n"); | |
ea73a9f2 | 3191 | goto out; |
1da177e4 LT |
3192 | } |
3193 | ||
e73aec82 | 3194 | sd_spinup_disk(sdkp); |
1da177e4 LT |
3195 | |
3196 | /* | |
3197 | * Without media there is no reason to ask; moreover, some devices | |
3198 | * react badly if we do. | |
3199 | */ | |
3200 | if (sdkp->media_present) { | |
e73aec82 | 3201 | sd_read_capacity(sdkp, buffer); |
ffd4bc2a | 3202 | |
5ddfe085 | 3203 | if (scsi_device_supports_vpd(sdp)) { |
c98a0eb0 | 3204 | sd_read_block_provisioning(sdkp); |
ffd4bc2a MP |
3205 | sd_read_block_limits(sdkp); |
3206 | sd_read_block_characteristics(sdkp); | |
89d94756 | 3207 | sd_zbc_read_zones(sdkp, buffer); |
ffd4bc2a MP |
3208 | } |
3209 | ||
89d94756 HR |
3210 | sd_print_capacity(sdkp, old_capacity); |
3211 | ||
e73aec82 MP |
3212 | sd_read_write_protect_flag(sdkp, buffer); |
3213 | sd_read_cache_type(sdkp, buffer); | |
e0597d70 | 3214 | sd_read_app_tag_own(sdkp, buffer); |
5db44863 | 3215 | sd_read_write_same(sdkp, buffer); |
d80210f2 | 3216 | sd_read_security(sdkp, buffer); |
1da177e4 | 3217 | } |
461d4e90 TH |
3218 | |
3219 | /* | |
3220 | * We now have all cache related info, determine how we deal | |
4913efe4 | 3221 | * with flush requests. |
461d4e90 | 3222 | */ |
cb2fb68d | 3223 | sd_set_flush_flag(sdkp); |
461d4e90 | 3224 | |
ca369d51 MP |
3225 | /* Initial block count limit based on CDB TRANSFER LENGTH field size. */ |
3226 | dev_max = sdp->use_16_for_rw ? SD_MAX_XFER_BLOCKS : SD_DEF_XFER_BLOCKS; | |
3227 | ||
3228 | /* Some devices report a maximum block count for READ/WRITE requests. */ | |
3229 | dev_max = min_not_zero(dev_max, sdkp->max_xfer_blocks); | |
3230 | q->limits.max_dev_sectors = logical_to_sectors(sdp, dev_max); | |
3231 | ||
6fe3b82d | 3232 | if (sd_validate_opt_xfer_size(sdkp, dev_max)) { |
6b7e9cde MP |
3233 | q->limits.io_opt = logical_to_bytes(sdp, sdkp->opt_xfer_blocks); |
3234 | rw_max = logical_to_sectors(sdp, sdkp->opt_xfer_blocks); | |
3235 | } else | |
67804145 FZ |
3236 | rw_max = min_not_zero(logical_to_sectors(sdp, dev_max), |
3237 | (sector_t)BLK_DEF_MAX_SECTORS); | |
3a9794d3 | 3238 | |
77082ca5 MP |
3239 | /* Do not exceed controller limit */ |
3240 | rw_max = min(rw_max, queue_max_hw_sectors(q)); | |
3241 | ||
3242 | /* | |
3243 | * Only update max_sectors if previously unset or if the current value | |
3244 | * exceeds the capabilities of the hardware. | |
3245 | */ | |
3246 | if (sdkp->first_scan || | |
3247 | q->limits.max_sectors > q->limits.max_dev_sectors || | |
3248 | q->limits.max_sectors > q->limits.max_hw_sectors) | |
3249 | q->limits.max_sectors = rw_max; | |
3250 | ||
3251 | sdkp->first_scan = 0; | |
4f258a46 | 3252 | |
f08bb1e0 | 3253 | set_capacity(disk, logical_to_sectors(sdp, sdkp->capacity)); |
5db44863 | 3254 | sd_config_write_same(sdkp); |
1da177e4 LT |
3255 | kfree(buffer); |
3256 | ||
1da177e4 LT |
3257 | out: |
3258 | return 0; | |
3259 | } | |
3260 | ||
72ec24bd TH |
3261 | /** |
3262 | * sd_unlock_native_capacity - unlock native capacity | |
3263 | * @disk: struct gendisk to set capacity for | |
3264 | * | |
3265 | * Block layer calls this function if it detects that partitions | |
3266 | * on @disk reach beyond the end of the device. If the SCSI host | |
3267 | * implements ->unlock_native_capacity() method, it's invoked to | |
3268 | * give it a chance to adjust the device capacity. | |
3269 | * | |
3270 | * CONTEXT: | |
3271 | * Defined by block layer. Might sleep. | |
3272 | */ | |
3273 | static void sd_unlock_native_capacity(struct gendisk *disk) | |
3274 | { | |
3275 | struct scsi_device *sdev = scsi_disk(disk)->device; | |
3276 | ||
3277 | if (sdev->host->hostt->unlock_native_capacity) | |
3278 | sdev->host->hostt->unlock_native_capacity(sdev); | |
3279 | } | |
3280 | ||
3e1a7ff8 TH |
3281 | /** |
3282 | * sd_format_disk_name - format disk name | |
3283 | * @prefix: name prefix - ie. "sd" for SCSI disks | |
3284 | * @index: index of the disk to format name for | |
3285 | * @buf: output buffer | |
3286 | * @buflen: length of the output buffer | |
3287 | * | |
3288 | * SCSI disk names starts at sda. The 26th device is sdz and the | |
3289 | * 27th is sdaa. The last one for two lettered suffix is sdzz | |
3290 | * which is followed by sdaaa. | |
3291 | * | |
3292 | * This is basically 26 base counting with one extra 'nil' entry | |
3ad2f3fb | 3293 | * at the beginning from the second digit on and can be |
3e1a7ff8 TH |
3294 | * determined using similar method as 26 base conversion with the |
3295 | * index shifted -1 after each digit is computed. | |
3296 | * | |
3297 | * CONTEXT: | |
3298 | * Don't care. | |
3299 | * | |
3300 | * RETURNS: | |
3301 | * 0 on success, -errno on failure. | |
3302 | */ | |
3303 | static int sd_format_disk_name(char *prefix, int index, char *buf, int buflen) | |
3304 | { | |
3305 | const int base = 'z' - 'a' + 1; | |
3306 | char *begin = buf + strlen(prefix); | |
3307 | char *end = buf + buflen; | |
3308 | char *p; | |
3309 | int unit; | |
3310 | ||
3311 | p = end - 1; | |
3312 | *p = '\0'; | |
3313 | unit = base; | |
3314 | do { | |
3315 | if (p == begin) | |
3316 | return -EINVAL; | |
3317 | *--p = 'a' + (index % unit); | |
3318 | index = (index / unit) - 1; | |
3319 | } while (index >= 0); | |
3320 | ||
3321 | memmove(begin, p, end - p); | |
3322 | memcpy(buf, prefix, strlen(prefix)); | |
3323 | ||
3324 | return 0; | |
3325 | } | |
3326 | ||
4ace92fc AV |
3327 | /* |
3328 | * The asynchronous part of sd_probe | |
3329 | */ | |
3330 | static void sd_probe_async(void *data, async_cookie_t cookie) | |
3331 | { | |
3332 | struct scsi_disk *sdkp = data; | |
3333 | struct scsi_device *sdp; | |
3334 | struct gendisk *gd; | |
3335 | u32 index; | |
3336 | struct device *dev; | |
3337 | ||
3338 | sdp = sdkp->device; | |
3339 | gd = sdkp->disk; | |
3340 | index = sdkp->index; | |
3341 | dev = &sdp->sdev_gendev; | |
3342 | ||
1a03ae0f MR |
3343 | gd->major = sd_major((index & 0xf0) >> 4); |
3344 | gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00); | |
1a03ae0f | 3345 | |
4ace92fc AV |
3346 | gd->fops = &sd_fops; |
3347 | gd->private_data = &sdkp->driver; | |
3348 | gd->queue = sdkp->device->request_queue; | |
3349 | ||
70a9b873 MP |
3350 | /* defaults, until the device tells us otherwise */ |
3351 | sdp->sector_size = 512; | |
3352 | sdkp->capacity = 0; | |
3353 | sdkp->media_present = 1; | |
3354 | sdkp->write_prot = 0; | |
39c60a09 | 3355 | sdkp->cache_override = 0; |
70a9b873 MP |
3356 | sdkp->WCE = 0; |
3357 | sdkp->RCD = 0; | |
3358 | sdkp->ATO = 0; | |
3359 | sdkp->first_scan = 1; | |
18a4d0a2 | 3360 | sdkp->max_medium_access_timeouts = SD_MAX_MEDIUM_TIMEOUTS; |
70a9b873 | 3361 | |
4ace92fc AV |
3362 | sd_revalidate_disk(gd); |
3363 | ||
97fedbbe | 3364 | gd->flags = GENHD_FL_EXT_DEVT; |
2bae0093 | 3365 | if (sdp->removable) { |
4ace92fc | 3366 | gd->flags |= GENHD_FL_REMOVABLE; |
2bae0093 TH |
3367 | gd->events |= DISK_EVENT_MEDIA_CHANGE; |
3368 | } | |
4ace92fc | 3369 | |
10c580e4 | 3370 | blk_pm_runtime_init(sdp->request_queue, dev); |
0d52c756 | 3371 | device_add_disk(dev, gd); |
fe542396 MP |
3372 | if (sdkp->capacity) |
3373 | sd_dif_config_host(sdkp); | |
4ace92fc | 3374 | |
3821d768 MP |
3375 | sd_revalidate_disk(gd); |
3376 | ||
d80210f2 CH |
3377 | if (sdkp->security) { |
3378 | sdkp->opal_dev = init_opal_dev(sdp, &sd_sec_submit); | |
3379 | if (sdkp->opal_dev) | |
3380 | sd_printk(KERN_NOTICE, sdkp, "supports TCG Opal\n"); | |
3381 | } | |
3382 | ||
4ace92fc AV |
3383 | sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n", |
3384 | sdp->removable ? "removable " : ""); | |
478a8a05 | 3385 | scsi_autopm_put_device(sdp); |
ea038f63 | 3386 | put_device(&sdkp->dev); |
4ace92fc AV |
3387 | } |
3388 | ||
1da177e4 LT |
3389 | /** |
3390 | * sd_probe - called during driver initialization and whenever a | |
3391 | * new scsi device is attached to the system. It is called once | |
3392 | * for each scsi device (not just disks) present. | |
3393 | * @dev: pointer to device object | |
3394 | * | |
3395 | * Returns 0 if successful (or not interested in this scsi device | |
3396 | * (e.g. scanner)); 1 when there is an error. | |
3397 | * | |
3398 | * Note: this function is invoked from the scsi mid-level. | |
3399 | * This function sets up the mapping between a given | |
3400 | * <host,channel,id,lun> (found in sdp) and new device name | |
3401 | * (e.g. /dev/sda). More precisely it is the block device major | |
3402 | * and minor number that is chosen here. | |
3403 | * | |
2db93ce8 PU |
3404 | * Assume sd_probe is not re-entrant (for time being) |
3405 | * Also think about sd_probe() and sd_remove() running coincidentally. | |
1da177e4 LT |
3406 | **/ |
3407 | static int sd_probe(struct device *dev) | |
3408 | { | |
3409 | struct scsi_device *sdp = to_scsi_device(dev); | |
3410 | struct scsi_disk *sdkp; | |
3411 | struct gendisk *gd; | |
439d77f7 | 3412 | int index; |
1da177e4 LT |
3413 | int error; |
3414 | ||
6fe8c1db | 3415 | scsi_autopm_get_device(sdp); |
1da177e4 | 3416 | error = -ENODEV; |
89d94756 HR |
3417 | if (sdp->type != TYPE_DISK && |
3418 | sdp->type != TYPE_ZBC && | |
3419 | sdp->type != TYPE_MOD && | |
3420 | sdp->type != TYPE_RBC) | |
1da177e4 LT |
3421 | goto out; |
3422 | ||
89d94756 HR |
3423 | #ifndef CONFIG_BLK_DEV_ZONED |
3424 | if (sdp->type == TYPE_ZBC) | |
3425 | goto out; | |
3426 | #endif | |
9ccfc756 | 3427 | SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO, sdp, |
2db93ce8 | 3428 | "sd_probe\n")); |
1da177e4 LT |
3429 | |
3430 | error = -ENOMEM; | |
24669f75 | 3431 | sdkp = kzalloc(sizeof(*sdkp), GFP_KERNEL); |
1da177e4 LT |
3432 | if (!sdkp) |
3433 | goto out; | |
3434 | ||
689d6fac | 3435 | gd = alloc_disk(SD_MINORS); |
1da177e4 | 3436 | if (!gd) |
c01228db | 3437 | goto out_free; |
1da177e4 | 3438 | |
f27bac27 TH |
3439 | do { |
3440 | if (!ida_pre_get(&sd_index_ida, GFP_KERNEL)) | |
3441 | goto out_put; | |
1da177e4 | 3442 | |
4034cc68 | 3443 | spin_lock(&sd_index_lock); |
f27bac27 | 3444 | error = ida_get_new(&sd_index_ida, &index); |
4034cc68 | 3445 | spin_unlock(&sd_index_lock); |
f27bac27 | 3446 | } while (error == -EAGAIN); |
1da177e4 | 3447 | |
21208ae5 DK |
3448 | if (error) { |
3449 | sdev_printk(KERN_WARNING, sdp, "sd_probe: memory exhausted.\n"); | |
1da177e4 | 3450 | goto out_put; |
1a03ae0f MR |
3451 | } |
3452 | ||
3e1a7ff8 | 3453 | error = sd_format_disk_name("sd", index, gd->disk_name, DISK_NAME_LEN); |
21208ae5 DK |
3454 | if (error) { |
3455 | sdev_printk(KERN_WARNING, sdp, "SCSI disk (sd) name length exceeded.\n"); | |
f27bac27 | 3456 | goto out_free_index; |
21208ae5 | 3457 | } |
f27bac27 | 3458 | |
1da177e4 LT |
3459 | sdkp->device = sdp; |
3460 | sdkp->driver = &sd_template; | |
3461 | sdkp->disk = gd; | |
3462 | sdkp->index = index; | |
409f3499 | 3463 | atomic_set(&sdkp->openers, 0); |
9e1a1537 | 3464 | atomic_set(&sdkp->device->ioerr_cnt, 0); |
1da177e4 | 3465 | |
601e7638 JB |
3466 | if (!sdp->request_queue->rq_timeout) { |
3467 | if (sdp->type != TYPE_MOD) | |
3468 | blk_queue_rq_timeout(sdp->request_queue, SD_TIMEOUT); | |
3469 | else | |
3470 | blk_queue_rq_timeout(sdp->request_queue, | |
3471 | SD_MOD_TIMEOUT); | |
3472 | } | |
3473 | ||
3474 | device_initialize(&sdkp->dev); | |
478a8a05 | 3475 | sdkp->dev.parent = dev; |
601e7638 | 3476 | sdkp->dev.class = &sd_disk_class; |
02aa2a37 | 3477 | dev_set_name(&sdkp->dev, "%s", dev_name(dev)); |
601e7638 | 3478 | |
dee0586e DC |
3479 | error = device_add(&sdkp->dev); |
3480 | if (error) | |
601e7638 JB |
3481 | goto out_free_index; |
3482 | ||
478a8a05 AS |
3483 | get_device(dev); |
3484 | dev_set_drvdata(dev, sdkp); | |
601e7638 | 3485 | |
ea038f63 | 3486 | get_device(&sdkp->dev); /* prevent release before async_schedule */ |
a7a20d10 | 3487 | async_schedule_domain(sd_probe_async, sdkp, &scsi_sd_probe_domain); |
1da177e4 LT |
3488 | |
3489 | return 0; | |
3490 | ||
f27bac27 | 3491 | out_free_index: |
c01228db JK |
3492 | spin_lock(&sd_index_lock); |
3493 | ida_remove(&sd_index_ida, index); | |
3494 | spin_unlock(&sd_index_lock); | |
6bdaa1f1 | 3495 | out_put: |
1da177e4 | 3496 | put_disk(gd); |
f170396c CIK |
3497 | out_free: |
3498 | kfree(sdkp); | |
6bdaa1f1 | 3499 | out: |
6fe8c1db | 3500 | scsi_autopm_put_device(sdp); |
1da177e4 LT |
3501 | return error; |
3502 | } | |
3503 | ||
3504 | /** | |
3505 | * sd_remove - called whenever a scsi disk (previously recognized by | |
3506 | * sd_probe) is detached from the system. It is called (potentially | |
3507 | * multiple times) during sd module unload. | |
f2a3313d | 3508 | * @dev: pointer to device object |
1da177e4 LT |
3509 | * |
3510 | * Note: this function is invoked from the scsi mid-level. | |
3511 | * This function potentially frees up a device name (e.g. /dev/sdc) | |
3512 | * that could be re-used by a subsequent sd_probe(). | |
3513 | * This function is not called when the built-in sd driver is "exit-ed". | |
3514 | **/ | |
3515 | static int sd_remove(struct device *dev) | |
3516 | { | |
601e7638 | 3517 | struct scsi_disk *sdkp; |
0761df9c | 3518 | dev_t devt; |
1da177e4 | 3519 | |
601e7638 | 3520 | sdkp = dev_get_drvdata(dev); |
0761df9c | 3521 | devt = disk_devt(sdkp->disk); |
478a8a05 AS |
3522 | scsi_autopm_get_device(sdkp->device); |
3523 | ||
3c31b52f | 3524 | async_synchronize_full_domain(&scsi_sd_pm_domain); |
a7a20d10 | 3525 | async_synchronize_full_domain(&scsi_sd_probe_domain); |
ee959b00 | 3526 | device_del(&sdkp->dev); |
1da177e4 LT |
3527 | del_gendisk(sdkp->disk); |
3528 | sd_shutdown(dev); | |
39b7f1e2 | 3529 | |
89d94756 HR |
3530 | sd_zbc_remove(sdkp); |
3531 | ||
d80210f2 CH |
3532 | free_opal_dev(sdkp->opal_dev); |
3533 | ||
0761df9c HR |
3534 | blk_register_region(devt, SD_MINORS, NULL, |
3535 | sd_default_probe, NULL, NULL); | |
3536 | ||
0b950672 | 3537 | mutex_lock(&sd_ref_mutex); |
39b7f1e2 | 3538 | dev_set_drvdata(dev, NULL); |
ee959b00 | 3539 | put_device(&sdkp->dev); |
0b950672 | 3540 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
3541 | |
3542 | return 0; | |
3543 | } | |
3544 | ||
3545 | /** | |
3546 | * scsi_disk_release - Called to free the scsi_disk structure | |
ee959b00 | 3547 | * @dev: pointer to embedded class device |
1da177e4 | 3548 | * |
0b950672 | 3549 | * sd_ref_mutex must be held entering this routine. Because it is |
1da177e4 LT |
3550 | * called on last put, you should always use the scsi_disk_get() |
3551 | * scsi_disk_put() helpers which manipulate the semaphore directly | |
ee959b00 | 3552 | * and never do a direct put_device. |
1da177e4 | 3553 | **/ |
ee959b00 | 3554 | static void scsi_disk_release(struct device *dev) |
1da177e4 | 3555 | { |
ee959b00 | 3556 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
1da177e4 | 3557 | struct gendisk *disk = sdkp->disk; |
ea215158 BVA |
3558 | struct request_queue *q = disk->queue; |
3559 | ||
c01228db JK |
3560 | spin_lock(&sd_index_lock); |
3561 | ida_remove(&sd_index_ida, sdkp->index); | |
3562 | spin_unlock(&sd_index_lock); | |
3563 | ||
ea215158 BVA |
3564 | /* |
3565 | * Wait until all requests that are in progress have completed. | |
3566 | * This is necessary to avoid that e.g. scsi_end_request() crashes | |
3567 | * due to clearing the disk->private_data pointer. Wait from inside | |
3568 | * scsi_disk_release() instead of from sd_release() to avoid that | |
3569 | * freezing and unfreezing the request queue affects user space I/O | |
3570 | * in case multiple processes open a /dev/sd... node concurrently. | |
3571 | */ | |
3572 | blk_mq_freeze_queue(q); | |
3573 | blk_mq_unfreeze_queue(q); | |
3574 | ||
1da177e4 | 3575 | disk->private_data = NULL; |
1da177e4 | 3576 | put_disk(disk); |
39b7f1e2 | 3577 | put_device(&sdkp->device->sdev_gendev); |
1da177e4 LT |
3578 | |
3579 | kfree(sdkp); | |
3580 | } | |
3581 | ||
cc5d2c8c | 3582 | static int sd_start_stop_device(struct scsi_disk *sdkp, int start) |
c3c94c5a TH |
3583 | { |
3584 | unsigned char cmd[6] = { START_STOP }; /* START_VALID */ | |
3585 | struct scsi_sense_hdr sshdr; | |
cc5d2c8c | 3586 | struct scsi_device *sdp = sdkp->device; |
c3c94c5a TH |
3587 | int res; |
3588 | ||
3589 | if (start) | |
3590 | cmd[4] |= 1; /* START */ | |
3591 | ||
d2886ea3 SR |
3592 | if (sdp->start_stop_pwr_cond) |
3593 | cmd[4] |= start ? 1 << 4 : 3 << 4; /* Active or Standby */ | |
3594 | ||
c3c94c5a TH |
3595 | if (!scsi_device_online(sdp)) |
3596 | return -ENODEV; | |
3597 | ||
fcbfffe2 CH |
3598 | res = scsi_execute(sdp, cmd, DMA_NONE, NULL, 0, NULL, &sshdr, |
3599 | SD_TIMEOUT, SD_MAX_RETRIES, 0, RQF_PM, NULL); | |
c3c94c5a | 3600 | if (res) { |
ef61329d | 3601 | sd_print_result(sdkp, "Start/Stop Unit failed", res); |
c3c94c5a | 3602 | if (driver_byte(res) & DRIVER_SENSE) |
cc5d2c8c | 3603 | sd_print_sense_hdr(sdkp, &sshdr); |
95897910 ON |
3604 | if (scsi_sense_valid(&sshdr) && |
3605 | /* 0x3a is medium not present */ | |
3606 | sshdr.asc == 0x3a) | |
3607 | res = 0; | |
c3c94c5a TH |
3608 | } |
3609 | ||
95897910 ON |
3610 | /* SCSI error codes must not go to the generic layer */ |
3611 | if (res) | |
3612 | return -EIO; | |
3613 | ||
3614 | return 0; | |
c3c94c5a TH |
3615 | } |
3616 | ||
1da177e4 LT |
3617 | /* |
3618 | * Send a SYNCHRONIZE CACHE instruction down to the device through | |
3619 | * the normal SCSI command structure. Wait for the command to | |
3620 | * complete. | |
3621 | */ | |
3622 | static void sd_shutdown(struct device *dev) | |
3623 | { | |
3d9a1f53 | 3624 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
1da177e4 LT |
3625 | |
3626 | if (!sdkp) | |
3627 | return; /* this can happen */ | |
3628 | ||
54f57588 | 3629 | if (pm_runtime_suspended(dev)) |
3d9a1f53 | 3630 | return; |
54f57588 | 3631 | |
95897910 | 3632 | if (sdkp->WCE && sdkp->media_present) { |
e73aec82 | 3633 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
4fa83244 | 3634 | sd_sync_cache(sdkp, NULL); |
39b7f1e2 | 3635 | } |
c3c94c5a | 3636 | |
cc5d2c8c JB |
3637 | if (system_state != SYSTEM_RESTART && sdkp->device->manage_start_stop) { |
3638 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); | |
3639 | sd_start_stop_device(sdkp, 0); | |
c3c94c5a | 3640 | } |
39b7f1e2 | 3641 | } |
1da177e4 | 3642 | |
95897910 | 3643 | static int sd_suspend_common(struct device *dev, bool ignore_stop_errors) |
c3c94c5a | 3644 | { |
3d9a1f53 | 3645 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
4fa83244 | 3646 | struct scsi_sense_hdr sshdr; |
09ff92fe | 3647 | int ret = 0; |
c3c94c5a | 3648 | |
13b43891 AS |
3649 | if (!sdkp) /* E.g.: runtime suspend following sd_remove() */ |
3650 | return 0; | |
c3c94c5a | 3651 | |
95897910 | 3652 | if (sdkp->WCE && sdkp->media_present) { |
cc5d2c8c | 3653 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
4fa83244 DB |
3654 | ret = sd_sync_cache(sdkp, &sshdr); |
3655 | ||
95897910 ON |
3656 | if (ret) { |
3657 | /* ignore OFFLINE device */ | |
3658 | if (ret == -ENODEV) | |
4fa83244 DB |
3659 | return 0; |
3660 | ||
3661 | if (!scsi_sense_valid(&sshdr) || | |
3662 | sshdr.sense_key != ILLEGAL_REQUEST) | |
3663 | return ret; | |
3664 | ||
3665 | /* | |
3666 | * sshdr.sense_key == ILLEGAL_REQUEST means this drive | |
3667 | * doesn't support sync. There's not much to do and | |
3668 | * suspend shouldn't fail. | |
3669 | */ | |
ed91f7ed | 3670 | ret = 0; |
95897910 | 3671 | } |
c3c94c5a TH |
3672 | } |
3673 | ||
691e3d31 | 3674 | if (sdkp->device->manage_start_stop) { |
cc5d2c8c | 3675 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); |
95897910 | 3676 | /* an error is not worth aborting a system sleep */ |
cc5d2c8c | 3677 | ret = sd_start_stop_device(sdkp, 0); |
95897910 ON |
3678 | if (ignore_stop_errors) |
3679 | ret = 0; | |
c3c94c5a TH |
3680 | } |
3681 | ||
09ff92fe | 3682 | return ret; |
c3c94c5a TH |
3683 | } |
3684 | ||
95897910 ON |
3685 | static int sd_suspend_system(struct device *dev) |
3686 | { | |
3687 | return sd_suspend_common(dev, true); | |
3688 | } | |
3689 | ||
3690 | static int sd_suspend_runtime(struct device *dev) | |
3691 | { | |
3692 | return sd_suspend_common(dev, false); | |
3693 | } | |
3694 | ||
c3c94c5a TH |
3695 | static int sd_resume(struct device *dev) |
3696 | { | |
3d9a1f53 | 3697 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
d80210f2 | 3698 | int ret; |
c3c94c5a | 3699 | |
13b43891 AS |
3700 | if (!sdkp) /* E.g.: runtime resume at the start of sd_probe() */ |
3701 | return 0; | |
3702 | ||
cc5d2c8c | 3703 | if (!sdkp->device->manage_start_stop) |
3d9a1f53 | 3704 | return 0; |
c3c94c5a | 3705 | |
cc5d2c8c | 3706 | sd_printk(KERN_NOTICE, sdkp, "Starting disk\n"); |
d80210f2 CH |
3707 | ret = sd_start_stop_device(sdkp, 1); |
3708 | if (!ret) | |
3709 | opal_unlock_from_suspend(sdkp->opal_dev); | |
3710 | return ret; | |
c3c94c5a TH |
3711 | } |
3712 | ||
1da177e4 LT |
3713 | /** |
3714 | * init_sd - entry point for this driver (both when built in or when | |
3715 | * a module). | |
3716 | * | |
3717 | * Note: this function registers this driver with the scsi mid-level. | |
3718 | **/ | |
3719 | static int __init init_sd(void) | |
3720 | { | |
5e4009ba | 3721 | int majors = 0, i, err; |
1da177e4 LT |
3722 | |
3723 | SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n")); | |
3724 | ||
0761df9c HR |
3725 | for (i = 0; i < SD_MAJORS; i++) { |
3726 | if (register_blkdev(sd_major(i), "sd") != 0) | |
3727 | continue; | |
3728 | majors++; | |
3729 | blk_register_region(sd_major(i), SD_MINORS, NULL, | |
3730 | sd_default_probe, NULL, NULL); | |
3731 | } | |
1da177e4 LT |
3732 | |
3733 | if (!majors) | |
3734 | return -ENODEV; | |
3735 | ||
5e4009ba JG |
3736 | err = class_register(&sd_disk_class); |
3737 | if (err) | |
3738 | goto err_out; | |
6bdaa1f1 | 3739 | |
4e7392ec MP |
3740 | sd_cdb_cache = kmem_cache_create("sd_ext_cdb", SD_EXT_CDB_SIZE, |
3741 | 0, 0, NULL); | |
3742 | if (!sd_cdb_cache) { | |
3743 | printk(KERN_ERR "sd: can't init extended cdb cache\n"); | |
8d964478 | 3744 | err = -ENOMEM; |
4e7392ec MP |
3745 | goto err_out_class; |
3746 | } | |
3747 | ||
3748 | sd_cdb_pool = mempool_create_slab_pool(SD_MEMPOOL_SIZE, sd_cdb_cache); | |
3749 | if (!sd_cdb_pool) { | |
3750 | printk(KERN_ERR "sd: can't init extended cdb pool\n"); | |
8d964478 | 3751 | err = -ENOMEM; |
4e7392ec MP |
3752 | goto err_out_cache; |
3753 | } | |
3754 | ||
1e76e375 JA |
3755 | sd_page_pool = mempool_create_page_pool(SD_MEMPOOL_SIZE, 0); |
3756 | if (!sd_page_pool) { | |
3757 | printk(KERN_ERR "sd: can't init discard page pool\n"); | |
3758 | err = -ENOMEM; | |
3759 | goto err_out_ppool; | |
3760 | } | |
3761 | ||
afd5e34b JD |
3762 | err = scsi_register_driver(&sd_template.gendrv); |
3763 | if (err) | |
3764 | goto err_out_driver; | |
3765 | ||
5e4009ba JG |
3766 | return 0; |
3767 | ||
afd5e34b | 3768 | err_out_driver: |
1e76e375 JA |
3769 | mempool_destroy(sd_page_pool); |
3770 | ||
3771 | err_out_ppool: | |
afd5e34b JD |
3772 | mempool_destroy(sd_cdb_pool); |
3773 | ||
4e7392ec MP |
3774 | err_out_cache: |
3775 | kmem_cache_destroy(sd_cdb_cache); | |
3776 | ||
5e4009ba JG |
3777 | err_out_class: |
3778 | class_unregister(&sd_disk_class); | |
3779 | err_out: | |
3780 | for (i = 0; i < SD_MAJORS; i++) | |
3781 | unregister_blkdev(sd_major(i), "sd"); | |
3782 | return err; | |
1da177e4 LT |
3783 | } |
3784 | ||
3785 | /** | |
3786 | * exit_sd - exit point for this driver (when it is a module). | |
3787 | * | |
3788 | * Note: this function unregisters this driver from the scsi mid-level. | |
3789 | **/ | |
3790 | static void __exit exit_sd(void) | |
3791 | { | |
3792 | int i; | |
3793 | ||
3794 | SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n")); | |
3795 | ||
afd5e34b | 3796 | scsi_unregister_driver(&sd_template.gendrv); |
4e7392ec | 3797 | mempool_destroy(sd_cdb_pool); |
1e76e375 | 3798 | mempool_destroy(sd_page_pool); |
4e7392ec MP |
3799 | kmem_cache_destroy(sd_cdb_cache); |
3800 | ||
5e4009ba JG |
3801 | class_unregister(&sd_disk_class); |
3802 | ||
0761df9c HR |
3803 | for (i = 0; i < SD_MAJORS; i++) { |
3804 | blk_unregister_region(sd_major(i), SD_MINORS); | |
1da177e4 | 3805 | unregister_blkdev(sd_major(i), "sd"); |
0761df9c | 3806 | } |
1da177e4 LT |
3807 | } |
3808 | ||
1da177e4 LT |
3809 | module_init(init_sd); |
3810 | module_exit(exit_sd); | |
e73aec82 MP |
3811 | |
3812 | static void sd_print_sense_hdr(struct scsi_disk *sdkp, | |
3813 | struct scsi_sense_hdr *sshdr) | |
3814 | { | |
21045519 HR |
3815 | scsi_print_sense_hdr(sdkp->device, |
3816 | sdkp->disk ? sdkp->disk->disk_name : NULL, sshdr); | |
e73aec82 MP |
3817 | } |
3818 | ||
ef61329d HR |
3819 | static void sd_print_result(const struct scsi_disk *sdkp, const char *msg, |
3820 | int result) | |
e73aec82 | 3821 | { |
ef61329d HR |
3822 | const char *hb_string = scsi_hostbyte_string(result); |
3823 | const char *db_string = scsi_driverbyte_string(result); | |
3824 | ||
3825 | if (hb_string || db_string) | |
3826 | sd_printk(KERN_INFO, sdkp, | |
3827 | "%s: Result: hostbyte=%s driverbyte=%s\n", msg, | |
3828 | hb_string ? hb_string : "invalid", | |
3829 | db_string ? db_string : "invalid"); | |
3830 | else | |
3831 | sd_printk(KERN_INFO, sdkp, | |
3832 | "%s: Result: hostbyte=0x%02x driverbyte=0x%02x\n", | |
3833 | msg, host_byte(result), driver_byte(result)); | |
e73aec82 MP |
3834 | } |
3835 |