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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> | |
bca6b067 | 48 | #include <linux/blk-pm.h> |
1da177e4 | 49 | #include <linux/delay.h> |
0b950672 | 50 | #include <linux/mutex.h> |
7404ad3b | 51 | #include <linux/string_helpers.h> |
4ace92fc | 52 | #include <linux/async.h> |
5a0e3ad6 | 53 | #include <linux/slab.h> |
d80210f2 | 54 | #include <linux/sed-opal.h> |
54f57588 | 55 | #include <linux/pm_runtime.h> |
924d55b0 | 56 | #include <linux/pr.h> |
8475c811 | 57 | #include <linux/t10-pi.h> |
7c0f6ba6 | 58 | #include <linux/uaccess.h> |
8f76d151 | 59 | #include <asm/unaligned.h> |
1da177e4 LT |
60 | |
61 | #include <scsi/scsi.h> | |
62 | #include <scsi/scsi_cmnd.h> | |
63 | #include <scsi/scsi_dbg.h> | |
64 | #include <scsi/scsi_device.h> | |
65 | #include <scsi/scsi_driver.h> | |
66 | #include <scsi/scsi_eh.h> | |
67 | #include <scsi/scsi_host.h> | |
68 | #include <scsi/scsi_ioctl.h> | |
1da177e4 LT |
69 | #include <scsi/scsicam.h> |
70 | ||
aa91696e | 71 | #include "sd.h" |
a7a20d10 | 72 | #include "scsi_priv.h" |
1da177e4 LT |
73 | #include "scsi_logging.h" |
74 | ||
f018fa55 RH |
75 | MODULE_AUTHOR("Eric Youngdale"); |
76 | MODULE_DESCRIPTION("SCSI disk (sd) driver"); | |
77 | MODULE_LICENSE("GPL"); | |
78 | ||
79 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK0_MAJOR); | |
80 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK1_MAJOR); | |
81 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK2_MAJOR); | |
82 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK3_MAJOR); | |
83 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK4_MAJOR); | |
84 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK5_MAJOR); | |
85 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK6_MAJOR); | |
86 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK7_MAJOR); | |
87 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK8_MAJOR); | |
88 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK9_MAJOR); | |
89 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK10_MAJOR); | |
90 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK11_MAJOR); | |
91 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK12_MAJOR); | |
92 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK13_MAJOR); | |
93 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK14_MAJOR); | |
94 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK15_MAJOR); | |
d7b8bcb0 MT |
95 | MODULE_ALIAS_SCSI_DEVICE(TYPE_DISK); |
96 | MODULE_ALIAS_SCSI_DEVICE(TYPE_MOD); | |
97 | MODULE_ALIAS_SCSI_DEVICE(TYPE_RBC); | |
89d94756 | 98 | MODULE_ALIAS_SCSI_DEVICE(TYPE_ZBC); |
f018fa55 | 99 | |
870d6656 | 100 | #if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT) |
f615b48c | 101 | #define SD_MINORS 16 |
870d6656 | 102 | #else |
3e1a7ff8 | 103 | #define SD_MINORS 0 |
870d6656 TH |
104 | #endif |
105 | ||
c98a0eb0 | 106 | static void sd_config_discard(struct scsi_disk *, unsigned int); |
5db44863 | 107 | static void sd_config_write_same(struct scsi_disk *); |
7b3d9545 | 108 | static int sd_revalidate_disk(struct gendisk *); |
72ec24bd | 109 | static void sd_unlock_native_capacity(struct gendisk *disk); |
7b3d9545 LT |
110 | static int sd_probe(struct device *); |
111 | static int sd_remove(struct device *); | |
112 | static void sd_shutdown(struct device *); | |
95897910 ON |
113 | static int sd_suspend_system(struct device *); |
114 | static int sd_suspend_runtime(struct device *); | |
7b3d9545 LT |
115 | static int sd_resume(struct device *); |
116 | static void sd_rescan(struct device *); | |
a1b73fc1 CH |
117 | static int sd_init_command(struct scsi_cmnd *SCpnt); |
118 | static void sd_uninit_command(struct scsi_cmnd *SCpnt); | |
7b3d9545 | 119 | static int sd_done(struct scsi_cmnd *); |
7a38dc0b | 120 | static void sd_eh_reset(struct scsi_cmnd *); |
2451079b | 121 | static int sd_eh_action(struct scsi_cmnd *, int); |
7b3d9545 | 122 | static void sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer); |
ee959b00 | 123 | static void scsi_disk_release(struct device *cdev); |
7b3d9545 | 124 | static void sd_print_sense_hdr(struct scsi_disk *, struct scsi_sense_hdr *); |
ef61329d | 125 | static void sd_print_result(const struct scsi_disk *, const char *, int); |
7b3d9545 | 126 | |
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; | |
4e7392ec | 136 | |
6bdaa1f1 JB |
137 | static const char *sd_cache_types[] = { |
138 | "write through", "none", "write back", | |
139 | "write back, no read (daft)" | |
140 | }; | |
141 | ||
cb2fb68d VC |
142 | static void sd_set_flush_flag(struct scsi_disk *sdkp) |
143 | { | |
eb310e23 | 144 | bool wc = false, fua = false; |
cb2fb68d VC |
145 | |
146 | if (sdkp->WCE) { | |
eb310e23 | 147 | wc = true; |
cb2fb68d | 148 | if (sdkp->DPOFUA) |
eb310e23 | 149 | fua = true; |
cb2fb68d VC |
150 | } |
151 | ||
eb310e23 | 152 | blk_queue_write_cache(sdkp->disk->queue, wc, fua); |
cb2fb68d VC |
153 | } |
154 | ||
ee959b00 | 155 | static ssize_t |
e1ea2351 GKH |
156 | cache_type_store(struct device *dev, struct device_attribute *attr, |
157 | const char *buf, size_t count) | |
6bdaa1f1 | 158 | { |
4c11712a | 159 | int ct, rcd, wce, sp; |
ee959b00 | 160 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
161 | struct scsi_device *sdp = sdkp->device; |
162 | char buffer[64]; | |
163 | char *buffer_data; | |
164 | struct scsi_mode_data data; | |
165 | struct scsi_sense_hdr sshdr; | |
2ee3e26c | 166 | static const char temp[] = "temporary "; |
6bdaa1f1 JB |
167 | int len; |
168 | ||
89d94756 | 169 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) |
6bdaa1f1 JB |
170 | /* no cache control on RBC devices; theoretically they |
171 | * can do it, but there's probably so many exceptions | |
172 | * it's not worth the risk */ | |
173 | return -EINVAL; | |
174 | ||
39c60a09 JB |
175 | if (strncmp(buf, temp, sizeof(temp) - 1) == 0) { |
176 | buf += sizeof(temp) - 1; | |
177 | sdkp->cache_override = 1; | |
178 | } else { | |
179 | sdkp->cache_override = 0; | |
180 | } | |
181 | ||
4c11712a | 182 | ct = sysfs_match_string(sd_cache_types, buf); |
6bdaa1f1 JB |
183 | if (ct < 0) |
184 | return -EINVAL; | |
4c11712a | 185 | |
6bdaa1f1 | 186 | rcd = ct & 0x01 ? 1 : 0; |
2eefd57b | 187 | wce = (ct & 0x02) && !sdkp->write_prot ? 1 : 0; |
39c60a09 JB |
188 | |
189 | if (sdkp->cache_override) { | |
190 | sdkp->WCE = wce; | |
191 | sdkp->RCD = rcd; | |
cb2fb68d | 192 | sd_set_flush_flag(sdkp); |
39c60a09 JB |
193 | return count; |
194 | } | |
195 | ||
6bdaa1f1 JB |
196 | if (scsi_mode_sense(sdp, 0x08, 8, buffer, sizeof(buffer), SD_TIMEOUT, |
197 | SD_MAX_RETRIES, &data, NULL)) | |
198 | return -EINVAL; | |
a9312fb8 | 199 | len = min_t(size_t, sizeof(buffer), data.length - data.header_length - |
6bdaa1f1 JB |
200 | data.block_descriptor_length); |
201 | buffer_data = buffer + data.header_length + | |
202 | data.block_descriptor_length; | |
203 | buffer_data[2] &= ~0x05; | |
204 | buffer_data[2] |= wce << 2 | rcd; | |
205 | sp = buffer_data[0] & 0x80 ? 1 : 0; | |
2c5d16d6 | 206 | buffer_data[0] &= ~0x80; |
6bdaa1f1 JB |
207 | |
208 | if (scsi_mode_select(sdp, 1, sp, 8, buffer_data, len, SD_TIMEOUT, | |
209 | SD_MAX_RETRIES, &data, &sshdr)) { | |
210 | if (scsi_sense_valid(&sshdr)) | |
e73aec82 | 211 | sd_print_sense_hdr(sdkp, &sshdr); |
6bdaa1f1 JB |
212 | return -EINVAL; |
213 | } | |
f98a8cae | 214 | revalidate_disk(sdkp->disk); |
6bdaa1f1 JB |
215 | return count; |
216 | } | |
217 | ||
ee959b00 | 218 | static ssize_t |
e1ea2351 GKH |
219 | manage_start_stop_show(struct device *dev, struct device_attribute *attr, |
220 | char *buf) | |
221 | { | |
222 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
223 | struct scsi_device *sdp = sdkp->device; | |
224 | ||
4c11712a | 225 | return sprintf(buf, "%u\n", sdp->manage_start_stop); |
e1ea2351 GKH |
226 | } |
227 | ||
228 | static ssize_t | |
229 | manage_start_stop_store(struct device *dev, struct device_attribute *attr, | |
230 | const char *buf, size_t count) | |
c3c94c5a | 231 | { |
ee959b00 | 232 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
c3c94c5a | 233 | struct scsi_device *sdp = sdkp->device; |
623401ee | 234 | bool v; |
c3c94c5a TH |
235 | |
236 | if (!capable(CAP_SYS_ADMIN)) | |
237 | return -EACCES; | |
238 | ||
623401ee | 239 | if (kstrtobool(buf, &v)) |
240 | return -EINVAL; | |
241 | ||
242 | sdp->manage_start_stop = v; | |
c3c94c5a TH |
243 | |
244 | return count; | |
245 | } | |
e1ea2351 | 246 | static DEVICE_ATTR_RW(manage_start_stop); |
c3c94c5a | 247 | |
ee959b00 | 248 | static ssize_t |
e1ea2351 GKH |
249 | allow_restart_show(struct device *dev, struct device_attribute *attr, char *buf) |
250 | { | |
251 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
252 | ||
4c11712a | 253 | return sprintf(buf, "%u\n", sdkp->device->allow_restart); |
e1ea2351 GKH |
254 | } |
255 | ||
256 | static ssize_t | |
257 | allow_restart_store(struct device *dev, struct device_attribute *attr, | |
258 | const char *buf, size_t count) | |
a144c5ae | 259 | { |
658e9a6d | 260 | bool v; |
ee959b00 | 261 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
a144c5ae BK |
262 | struct scsi_device *sdp = sdkp->device; |
263 | ||
264 | if (!capable(CAP_SYS_ADMIN)) | |
265 | return -EACCES; | |
266 | ||
89d94756 | 267 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) |
a144c5ae BK |
268 | return -EINVAL; |
269 | ||
658e9a6d | 270 | if (kstrtobool(buf, &v)) |
271 | return -EINVAL; | |
272 | ||
273 | sdp->allow_restart = v; | |
a144c5ae BK |
274 | |
275 | return count; | |
276 | } | |
e1ea2351 | 277 | static DEVICE_ATTR_RW(allow_restart); |
a144c5ae | 278 | |
ee959b00 | 279 | static ssize_t |
e1ea2351 | 280 | cache_type_show(struct device *dev, struct device_attribute *attr, char *buf) |
6bdaa1f1 | 281 | { |
ee959b00 | 282 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
283 | int ct = sdkp->RCD + 2*sdkp->WCE; |
284 | ||
4c11712a | 285 | return sprintf(buf, "%s\n", sd_cache_types[ct]); |
6bdaa1f1 | 286 | } |
e1ea2351 | 287 | static DEVICE_ATTR_RW(cache_type); |
6bdaa1f1 | 288 | |
ee959b00 | 289 | static ssize_t |
e1ea2351 | 290 | FUA_show(struct device *dev, struct device_attribute *attr, char *buf) |
6bdaa1f1 | 291 | { |
ee959b00 | 292 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 | 293 | |
4c11712a | 294 | return sprintf(buf, "%u\n", sdkp->DPOFUA); |
6bdaa1f1 | 295 | } |
e1ea2351 | 296 | static DEVICE_ATTR_RO(FUA); |
6bdaa1f1 | 297 | |
ee959b00 | 298 | static ssize_t |
e1ea2351 GKH |
299 | protection_type_show(struct device *dev, struct device_attribute *attr, |
300 | char *buf) | |
e0597d70 MP |
301 | { |
302 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
303 | ||
4c11712a | 304 | return sprintf(buf, "%u\n", sdkp->protection_type); |
e0597d70 MP |
305 | } |
306 | ||
8172499a | 307 | static ssize_t |
e1ea2351 GKH |
308 | protection_type_store(struct device *dev, struct device_attribute *attr, |
309 | const char *buf, size_t count) | |
8172499a MP |
310 | { |
311 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
312 | unsigned int val; | |
313 | int err; | |
314 | ||
315 | if (!capable(CAP_SYS_ADMIN)) | |
316 | return -EACCES; | |
317 | ||
318 | err = kstrtouint(buf, 10, &val); | |
319 | ||
320 | if (err) | |
321 | return err; | |
322 | ||
830cc351 | 323 | if (val <= T10_PI_TYPE3_PROTECTION) |
8172499a MP |
324 | sdkp->protection_type = val; |
325 | ||
326 | return count; | |
327 | } | |
e1ea2351 | 328 | static DEVICE_ATTR_RW(protection_type); |
8172499a | 329 | |
518fa8e3 | 330 | static ssize_t |
e1ea2351 GKH |
331 | protection_mode_show(struct device *dev, struct device_attribute *attr, |
332 | char *buf) | |
518fa8e3 MP |
333 | { |
334 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
335 | struct scsi_device *sdp = sdkp->device; | |
336 | unsigned int dif, dix; | |
337 | ||
338 | dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type); | |
339 | dix = scsi_host_dix_capable(sdp->host, sdkp->protection_type); | |
340 | ||
8475c811 | 341 | if (!dix && scsi_host_dix_capable(sdp->host, T10_PI_TYPE0_PROTECTION)) { |
518fa8e3 MP |
342 | dif = 0; |
343 | dix = 1; | |
344 | } | |
345 | ||
346 | if (!dif && !dix) | |
4c11712a | 347 | return sprintf(buf, "none\n"); |
518fa8e3 | 348 | |
4c11712a | 349 | return sprintf(buf, "%s%u\n", dix ? "dix" : "dif", dif); |
518fa8e3 | 350 | } |
e1ea2351 | 351 | static DEVICE_ATTR_RO(protection_mode); |
518fa8e3 | 352 | |
e0597d70 | 353 | static ssize_t |
e1ea2351 | 354 | app_tag_own_show(struct device *dev, struct device_attribute *attr, char *buf) |
e0597d70 MP |
355 | { |
356 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
357 | ||
4c11712a | 358 | return sprintf(buf, "%u\n", sdkp->ATO); |
e0597d70 | 359 | } |
e1ea2351 | 360 | static DEVICE_ATTR_RO(app_tag_own); |
e0597d70 | 361 | |
e339c1a7 | 362 | static ssize_t |
e1ea2351 GKH |
363 | thin_provisioning_show(struct device *dev, struct device_attribute *attr, |
364 | char *buf) | |
e339c1a7 MP |
365 | { |
366 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
367 | ||
4c11712a | 368 | return sprintf(buf, "%u\n", sdkp->lbpme); |
c98a0eb0 | 369 | } |
e1ea2351 | 370 | static DEVICE_ATTR_RO(thin_provisioning); |
c98a0eb0 | 371 | |
4c11712a | 372 | /* sysfs_match_string() requires dense arrays */ |
c98a0eb0 MP |
373 | static const char *lbp_mode[] = { |
374 | [SD_LBP_FULL] = "full", | |
375 | [SD_LBP_UNMAP] = "unmap", | |
376 | [SD_LBP_WS16] = "writesame_16", | |
377 | [SD_LBP_WS10] = "writesame_10", | |
378 | [SD_LBP_ZERO] = "writesame_zero", | |
379 | [SD_LBP_DISABLE] = "disabled", | |
380 | }; | |
381 | ||
382 | static ssize_t | |
e1ea2351 GKH |
383 | provisioning_mode_show(struct device *dev, struct device_attribute *attr, |
384 | char *buf) | |
c98a0eb0 MP |
385 | { |
386 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
387 | ||
4c11712a | 388 | return sprintf(buf, "%s\n", lbp_mode[sdkp->provisioning_mode]); |
c98a0eb0 MP |
389 | } |
390 | ||
391 | static ssize_t | |
e1ea2351 GKH |
392 | provisioning_mode_store(struct device *dev, struct device_attribute *attr, |
393 | const char *buf, size_t count) | |
c98a0eb0 MP |
394 | { |
395 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
396 | struct scsi_device *sdp = sdkp->device; | |
4c11712a | 397 | int mode; |
c98a0eb0 MP |
398 | |
399 | if (!capable(CAP_SYS_ADMIN)) | |
400 | return -EACCES; | |
401 | ||
89d94756 HR |
402 | if (sd_is_zoned(sdkp)) { |
403 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
404 | return count; | |
405 | } | |
406 | ||
c98a0eb0 MP |
407 | if (sdp->type != TYPE_DISK) |
408 | return -EINVAL; | |
409 | ||
4c11712a MP |
410 | mode = sysfs_match_string(lbp_mode, buf); |
411 | if (mode < 0) | |
c98a0eb0 MP |
412 | return -EINVAL; |
413 | ||
4c11712a MP |
414 | sd_config_discard(sdkp, mode); |
415 | ||
c98a0eb0 | 416 | return count; |
e339c1a7 | 417 | } |
e1ea2351 | 418 | static DEVICE_ATTR_RW(provisioning_mode); |
e339c1a7 | 419 | |
4c11712a | 420 | /* sysfs_match_string() requires dense arrays */ |
e6bd9312 MP |
421 | static const char *zeroing_mode[] = { |
422 | [SD_ZERO_WRITE] = "write", | |
423 | [SD_ZERO_WS] = "writesame", | |
424 | [SD_ZERO_WS16_UNMAP] = "writesame_16_unmap", | |
425 | [SD_ZERO_WS10_UNMAP] = "writesame_10_unmap", | |
426 | }; | |
427 | ||
428 | static ssize_t | |
429 | zeroing_mode_show(struct device *dev, struct device_attribute *attr, | |
430 | char *buf) | |
431 | { | |
432 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
433 | ||
4c11712a | 434 | return sprintf(buf, "%s\n", zeroing_mode[sdkp->zeroing_mode]); |
e6bd9312 MP |
435 | } |
436 | ||
437 | static ssize_t | |
438 | zeroing_mode_store(struct device *dev, struct device_attribute *attr, | |
439 | const char *buf, size_t count) | |
440 | { | |
441 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
4c11712a | 442 | int mode; |
e6bd9312 MP |
443 | |
444 | if (!capable(CAP_SYS_ADMIN)) | |
445 | return -EACCES; | |
446 | ||
4c11712a MP |
447 | mode = sysfs_match_string(zeroing_mode, buf); |
448 | if (mode < 0) | |
e6bd9312 MP |
449 | return -EINVAL; |
450 | ||
4c11712a MP |
451 | sdkp->zeroing_mode = mode; |
452 | ||
e6bd9312 MP |
453 | return count; |
454 | } | |
455 | static DEVICE_ATTR_RW(zeroing_mode); | |
456 | ||
18a4d0a2 | 457 | static ssize_t |
e1ea2351 GKH |
458 | max_medium_access_timeouts_show(struct device *dev, |
459 | struct device_attribute *attr, char *buf) | |
18a4d0a2 MP |
460 | { |
461 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
462 | ||
4c11712a | 463 | return sprintf(buf, "%u\n", sdkp->max_medium_access_timeouts); |
18a4d0a2 MP |
464 | } |
465 | ||
466 | static ssize_t | |
e1ea2351 GKH |
467 | max_medium_access_timeouts_store(struct device *dev, |
468 | struct device_attribute *attr, const char *buf, | |
469 | size_t count) | |
18a4d0a2 MP |
470 | { |
471 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
472 | int err; | |
473 | ||
474 | if (!capable(CAP_SYS_ADMIN)) | |
475 | return -EACCES; | |
476 | ||
477 | err = kstrtouint(buf, 10, &sdkp->max_medium_access_timeouts); | |
478 | ||
479 | return err ? err : count; | |
480 | } | |
e1ea2351 | 481 | static DEVICE_ATTR_RW(max_medium_access_timeouts); |
18a4d0a2 | 482 | |
5db44863 | 483 | static ssize_t |
e1ea2351 GKH |
484 | max_write_same_blocks_show(struct device *dev, struct device_attribute *attr, |
485 | char *buf) | |
5db44863 MP |
486 | { |
487 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
488 | ||
4c11712a | 489 | return sprintf(buf, "%u\n", sdkp->max_ws_blocks); |
5db44863 MP |
490 | } |
491 | ||
492 | static ssize_t | |
e1ea2351 GKH |
493 | max_write_same_blocks_store(struct device *dev, struct device_attribute *attr, |
494 | const char *buf, size_t count) | |
5db44863 MP |
495 | { |
496 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
497 | struct scsi_device *sdp = sdkp->device; | |
498 | unsigned long max; | |
499 | int err; | |
500 | ||
501 | if (!capable(CAP_SYS_ADMIN)) | |
502 | return -EACCES; | |
503 | ||
89d94756 | 504 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) |
5db44863 MP |
505 | return -EINVAL; |
506 | ||
507 | err = kstrtoul(buf, 10, &max); | |
508 | ||
509 | if (err) | |
510 | return err; | |
511 | ||
512 | if (max == 0) | |
513 | sdp->no_write_same = 1; | |
66c28f97 MP |
514 | else if (max <= SD_MAX_WS16_BLOCKS) { |
515 | sdp->no_write_same = 0; | |
5db44863 | 516 | sdkp->max_ws_blocks = max; |
66c28f97 | 517 | } |
5db44863 MP |
518 | |
519 | sd_config_write_same(sdkp); | |
520 | ||
521 | return count; | |
522 | } | |
e1ea2351 GKH |
523 | static DEVICE_ATTR_RW(max_write_same_blocks); |
524 | ||
525 | static struct attribute *sd_disk_attrs[] = { | |
526 | &dev_attr_cache_type.attr, | |
527 | &dev_attr_FUA.attr, | |
528 | &dev_attr_allow_restart.attr, | |
529 | &dev_attr_manage_start_stop.attr, | |
530 | &dev_attr_protection_type.attr, | |
531 | &dev_attr_protection_mode.attr, | |
532 | &dev_attr_app_tag_own.attr, | |
533 | &dev_attr_thin_provisioning.attr, | |
534 | &dev_attr_provisioning_mode.attr, | |
e6bd9312 | 535 | &dev_attr_zeroing_mode.attr, |
e1ea2351 GKH |
536 | &dev_attr_max_write_same_blocks.attr, |
537 | &dev_attr_max_medium_access_timeouts.attr, | |
538 | NULL, | |
6bdaa1f1 | 539 | }; |
e1ea2351 | 540 | ATTRIBUTE_GROUPS(sd_disk); |
6bdaa1f1 JB |
541 | |
542 | static struct class sd_disk_class = { | |
543 | .name = "scsi_disk", | |
544 | .owner = THIS_MODULE, | |
ee959b00 | 545 | .dev_release = scsi_disk_release, |
e1ea2351 | 546 | .dev_groups = sd_disk_groups, |
6bdaa1f1 | 547 | }; |
1da177e4 | 548 | |
691e3d31 | 549 | static const struct dev_pm_ops sd_pm_ops = { |
95897910 | 550 | .suspend = sd_suspend_system, |
691e3d31 | 551 | .resume = sd_resume, |
95897910 | 552 | .poweroff = sd_suspend_system, |
691e3d31 | 553 | .restore = sd_resume, |
95897910 | 554 | .runtime_suspend = sd_suspend_runtime, |
691e3d31 AL |
555 | .runtime_resume = sd_resume, |
556 | }; | |
557 | ||
1da177e4 | 558 | static struct scsi_driver sd_template = { |
1da177e4 LT |
559 | .gendrv = { |
560 | .name = "sd", | |
3af6b352 | 561 | .owner = THIS_MODULE, |
1da177e4 LT |
562 | .probe = sd_probe, |
563 | .remove = sd_remove, | |
564 | .shutdown = sd_shutdown, | |
691e3d31 | 565 | .pm = &sd_pm_ops, |
1da177e4 LT |
566 | }, |
567 | .rescan = sd_rescan, | |
a1b73fc1 CH |
568 | .init_command = sd_init_command, |
569 | .uninit_command = sd_uninit_command, | |
7b3d9545 | 570 | .done = sd_done, |
18a4d0a2 | 571 | .eh_action = sd_eh_action, |
7a38dc0b | 572 | .eh_reset = sd_eh_reset, |
1da177e4 LT |
573 | }; |
574 | ||
0761df9c HR |
575 | /* |
576 | * Dummy kobj_map->probe function. | |
577 | * The default ->probe function will call modprobe, which is | |
578 | * pointless as this module is already loaded. | |
579 | */ | |
580 | static struct kobject *sd_default_probe(dev_t devt, int *partno, void *data) | |
581 | { | |
582 | return NULL; | |
583 | } | |
584 | ||
1da177e4 LT |
585 | /* |
586 | * Device no to disk mapping: | |
587 | * | |
588 | * major disc2 disc p1 | |
589 | * |............|.............|....|....| <- dev_t | |
590 | * 31 20 19 8 7 4 3 0 | |
591 | * | |
592 | * Inside a major, we have 16k disks, however mapped non- | |
593 | * contiguously. The first 16 disks are for major0, the next | |
594 | * ones with major1, ... Disk 256 is for major0 again, disk 272 | |
595 | * for major1, ... | |
596 | * As we stay compatible with our numbering scheme, we can reuse | |
597 | * the well-know SCSI majors 8, 65--71, 136--143. | |
598 | */ | |
599 | static int sd_major(int major_idx) | |
600 | { | |
601 | switch (major_idx) { | |
602 | case 0: | |
603 | return SCSI_DISK0_MAJOR; | |
604 | case 1 ... 7: | |
605 | return SCSI_DISK1_MAJOR + major_idx - 1; | |
606 | case 8 ... 15: | |
607 | return SCSI_DISK8_MAJOR + major_idx - 8; | |
608 | default: | |
609 | BUG(); | |
610 | return 0; /* shut up gcc */ | |
611 | } | |
612 | } | |
613 | ||
3d9a1f53 | 614 | static struct scsi_disk *scsi_disk_get(struct gendisk *disk) |
1da177e4 LT |
615 | { |
616 | struct scsi_disk *sdkp = NULL; | |
617 | ||
3d9a1f53 CH |
618 | mutex_lock(&sd_ref_mutex); |
619 | ||
39b7f1e2 AS |
620 | if (disk->private_data) { |
621 | sdkp = scsi_disk(disk); | |
622 | if (scsi_device_get(sdkp->device) == 0) | |
ee959b00 | 623 | get_device(&sdkp->dev); |
39b7f1e2 AS |
624 | else |
625 | sdkp = NULL; | |
626 | } | |
0b950672 | 627 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
628 | return sdkp; |
629 | } | |
630 | ||
631 | static void scsi_disk_put(struct scsi_disk *sdkp) | |
632 | { | |
633 | struct scsi_device *sdev = sdkp->device; | |
634 | ||
0b950672 | 635 | mutex_lock(&sd_ref_mutex); |
ee959b00 | 636 | put_device(&sdkp->dev); |
1da177e4 | 637 | scsi_device_put(sdev); |
0b950672 | 638 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
639 | } |
640 | ||
d80210f2 CH |
641 | #ifdef CONFIG_BLK_SED_OPAL |
642 | static int sd_sec_submit(void *data, u16 spsp, u8 secp, void *buffer, | |
643 | size_t len, bool send) | |
644 | { | |
645 | struct scsi_device *sdev = data; | |
646 | u8 cdb[12] = { 0, }; | |
647 | int ret; | |
648 | ||
649 | cdb[0] = send ? SECURITY_PROTOCOL_OUT : SECURITY_PROTOCOL_IN; | |
650 | cdb[1] = secp; | |
651 | put_unaligned_be16(spsp, &cdb[2]); | |
652 | put_unaligned_be32(len, &cdb[6]); | |
653 | ||
654 | ret = scsi_execute_req(sdev, cdb, | |
655 | send ? DMA_TO_DEVICE : DMA_FROM_DEVICE, | |
656 | buffer, len, NULL, SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
657 | return ret <= 0 ? ret : -EIO; | |
658 | } | |
659 | #endif /* CONFIG_BLK_SED_OPAL */ | |
660 | ||
c611529e MP |
661 | static unsigned char sd_setup_protect_cmnd(struct scsi_cmnd *scmd, |
662 | unsigned int dix, unsigned int dif) | |
35e1a5d9 | 663 | { |
c611529e MP |
664 | struct bio *bio = scmd->request->bio; |
665 | unsigned int prot_op = sd_prot_op(rq_data_dir(scmd->request), dix, dif); | |
666 | unsigned int protect = 0; | |
667 | ||
668 | if (dix) { /* DIX Type 0, 1, 2, 3 */ | |
669 | if (bio_integrity_flagged(bio, BIP_IP_CHECKSUM)) | |
670 | scmd->prot_flags |= SCSI_PROT_IP_CHECKSUM; | |
671 | ||
672 | if (bio_integrity_flagged(bio, BIP_CTRL_NOCHECK) == false) | |
673 | scmd->prot_flags |= SCSI_PROT_GUARD_CHECK; | |
674 | } | |
675 | ||
8475c811 | 676 | if (dif != T10_PI_TYPE3_PROTECTION) { /* DIX/DIF Type 0, 1, 2 */ |
c611529e MP |
677 | scmd->prot_flags |= SCSI_PROT_REF_INCREMENT; |
678 | ||
679 | if (bio_integrity_flagged(bio, BIP_CTRL_NOCHECK) == false) | |
680 | scmd->prot_flags |= SCSI_PROT_REF_CHECK; | |
681 | } | |
682 | ||
683 | if (dif) { /* DIX/DIF Type 1, 2, 3 */ | |
684 | scmd->prot_flags |= SCSI_PROT_TRANSFER_PI; | |
685 | ||
686 | if (bio_integrity_flagged(bio, BIP_DISK_NOCHECK)) | |
687 | protect = 3 << 5; /* Disable target PI checking */ | |
688 | else | |
689 | protect = 1 << 5; /* Enable target PI checking */ | |
35e1a5d9 MP |
690 | } |
691 | ||
692 | scsi_set_prot_op(scmd, prot_op); | |
693 | scsi_set_prot_type(scmd, dif); | |
c611529e MP |
694 | scmd->prot_flags &= sd_prot_flag_mask(prot_op); |
695 | ||
696 | return protect; | |
35e1a5d9 MP |
697 | } |
698 | ||
c98a0eb0 MP |
699 | static void sd_config_discard(struct scsi_disk *sdkp, unsigned int mode) |
700 | { | |
701 | struct request_queue *q = sdkp->disk->queue; | |
702 | unsigned int logical_block_size = sdkp->device->sector_size; | |
703 | unsigned int max_blocks = 0; | |
704 | ||
bcd069bb MP |
705 | q->limits.discard_alignment = |
706 | sdkp->unmap_alignment * logical_block_size; | |
707 | q->limits.discard_granularity = | |
708 | max(sdkp->physical_block_size, | |
709 | sdkp->unmap_granularity * logical_block_size); | |
89730393 MP |
710 | sdkp->provisioning_mode = mode; |
711 | ||
c98a0eb0 MP |
712 | switch (mode) { |
713 | ||
4c11712a | 714 | case SD_LBP_FULL: |
c98a0eb0 | 715 | case SD_LBP_DISABLE: |
2bb4cd5c | 716 | blk_queue_max_discard_sectors(q, 0); |
8b904b5b | 717 | blk_queue_flag_clear(QUEUE_FLAG_DISCARD, q); |
c98a0eb0 MP |
718 | return; |
719 | ||
720 | case SD_LBP_UNMAP: | |
5db44863 MP |
721 | max_blocks = min_not_zero(sdkp->max_unmap_blocks, |
722 | (u32)SD_MAX_WS16_BLOCKS); | |
c98a0eb0 MP |
723 | break; |
724 | ||
725 | case SD_LBP_WS16: | |
28a0bc41 MP |
726 | if (sdkp->device->unmap_limit_for_ws) |
727 | max_blocks = sdkp->max_unmap_blocks; | |
728 | else | |
729 | max_blocks = sdkp->max_ws_blocks; | |
730 | ||
731 | max_blocks = min_not_zero(max_blocks, (u32)SD_MAX_WS16_BLOCKS); | |
c98a0eb0 MP |
732 | break; |
733 | ||
734 | case SD_LBP_WS10: | |
28a0bc41 MP |
735 | if (sdkp->device->unmap_limit_for_ws) |
736 | max_blocks = sdkp->max_unmap_blocks; | |
737 | else | |
738 | max_blocks = sdkp->max_ws_blocks; | |
739 | ||
740 | max_blocks = min_not_zero(max_blocks, (u32)SD_MAX_WS10_BLOCKS); | |
c98a0eb0 MP |
741 | break; |
742 | ||
743 | case SD_LBP_ZERO: | |
5db44863 MP |
744 | max_blocks = min_not_zero(sdkp->max_ws_blocks, |
745 | (u32)SD_MAX_WS10_BLOCKS); | |
c98a0eb0 MP |
746 | break; |
747 | } | |
748 | ||
2bb4cd5c | 749 | blk_queue_max_discard_sectors(q, max_blocks * (logical_block_size >> 9)); |
8b904b5b | 750 | blk_queue_flag_set(QUEUE_FLAG_DISCARD, q); |
c98a0eb0 MP |
751 | } |
752 | ||
81d926e8 | 753 | static int sd_setup_unmap_cmnd(struct scsi_cmnd *cmd) |
e339c1a7 | 754 | { |
6a7b4398 | 755 | struct scsi_device *sdp = cmd->device; |
81d926e8 CH |
756 | struct request *rq = cmd->request; |
757 | u64 sector = blk_rq_pos(rq) >> (ilog2(sdp->sector_size) - 9); | |
758 | u32 nr_sectors = blk_rq_sectors(rq) >> (ilog2(sdp->sector_size) - 9); | |
759 | unsigned int data_len = 24; | |
c98a0eb0 | 760 | char *buf; |
e339c1a7 | 761 | |
81d926e8 CH |
762 | rq->special_vec.bv_page = alloc_page(GFP_ATOMIC | __GFP_ZERO); |
763 | if (!rq->special_vec.bv_page) | |
66ac0280 | 764 | return BLKPREP_DEFER; |
81d926e8 CH |
765 | rq->special_vec.bv_offset = 0; |
766 | rq->special_vec.bv_len = data_len; | |
767 | rq->rq_flags |= RQF_SPECIAL_PAYLOAD; | |
66ac0280 | 768 | |
81d926e8 CH |
769 | cmd->cmd_len = 10; |
770 | cmd->cmnd[0] = UNMAP; | |
771 | cmd->cmnd[8] = 24; | |
e339c1a7 | 772 | |
81d926e8 CH |
773 | buf = page_address(rq->special_vec.bv_page); |
774 | put_unaligned_be16(6 + 16, &buf[0]); | |
775 | put_unaligned_be16(16, &buf[2]); | |
776 | put_unaligned_be64(sector, &buf[8]); | |
777 | put_unaligned_be32(nr_sectors, &buf[16]); | |
e339c1a7 | 778 | |
81d926e8 CH |
779 | cmd->allowed = SD_MAX_RETRIES; |
780 | cmd->transfersize = data_len; | |
781 | rq->timeout = SD_TIMEOUT; | |
782 | scsi_req(rq)->resid_len = data_len; | |
e339c1a7 | 783 | |
81d926e8 CH |
784 | return scsi_init_io(cmd); |
785 | } | |
c98a0eb0 | 786 | |
02d26103 | 787 | static int sd_setup_write_same16_cmnd(struct scsi_cmnd *cmd, bool unmap) |
81d926e8 CH |
788 | { |
789 | struct scsi_device *sdp = cmd->device; | |
790 | struct request *rq = cmd->request; | |
791 | u64 sector = blk_rq_pos(rq) >> (ilog2(sdp->sector_size) - 9); | |
792 | u32 nr_sectors = blk_rq_sectors(rq) >> (ilog2(sdp->sector_size) - 9); | |
793 | u32 data_len = sdp->sector_size; | |
c98a0eb0 | 794 | |
81d926e8 CH |
795 | rq->special_vec.bv_page = alloc_page(GFP_ATOMIC | __GFP_ZERO); |
796 | if (!rq->special_vec.bv_page) | |
797 | return BLKPREP_DEFER; | |
798 | rq->special_vec.bv_offset = 0; | |
799 | rq->special_vec.bv_len = data_len; | |
800 | rq->rq_flags |= RQF_SPECIAL_PAYLOAD; | |
c98a0eb0 | 801 | |
81d926e8 CH |
802 | cmd->cmd_len = 16; |
803 | cmd->cmnd[0] = WRITE_SAME_16; | |
02d26103 | 804 | if (unmap) |
6a7b4398 | 805 | cmd->cmnd[1] = 0x8; /* UNMAP */ |
81d926e8 CH |
806 | put_unaligned_be64(sector, &cmd->cmnd[2]); |
807 | put_unaligned_be32(nr_sectors, &cmd->cmnd[10]); | |
66ac0280 | 808 | |
81d926e8 CH |
809 | cmd->allowed = SD_MAX_RETRIES; |
810 | cmd->transfersize = data_len; | |
02d26103 | 811 | rq->timeout = unmap ? SD_TIMEOUT : SD_WRITE_SAME_TIMEOUT; |
81d926e8 | 812 | scsi_req(rq)->resid_len = data_len; |
c98a0eb0 | 813 | |
81d926e8 CH |
814 | return scsi_init_io(cmd); |
815 | } | |
c98a0eb0 | 816 | |
81d926e8 CH |
817 | static int sd_setup_write_same10_cmnd(struct scsi_cmnd *cmd, bool unmap) |
818 | { | |
819 | struct scsi_device *sdp = cmd->device; | |
820 | struct request *rq = cmd->request; | |
821 | u64 sector = blk_rq_pos(rq) >> (ilog2(sdp->sector_size) - 9); | |
822 | u32 nr_sectors = blk_rq_sectors(rq) >> (ilog2(sdp->sector_size) - 9); | |
823 | u32 data_len = sdp->sector_size; | |
c98a0eb0 | 824 | |
81d926e8 CH |
825 | rq->special_vec.bv_page = alloc_page(GFP_ATOMIC | __GFP_ZERO); |
826 | if (!rq->special_vec.bv_page) | |
827 | return BLKPREP_DEFER; | |
828 | rq->special_vec.bv_offset = 0; | |
829 | rq->special_vec.bv_len = data_len; | |
f9d03f96 | 830 | rq->rq_flags |= RQF_SPECIAL_PAYLOAD; |
e339c1a7 | 831 | |
81d926e8 CH |
832 | cmd->cmd_len = 10; |
833 | cmd->cmnd[0] = WRITE_SAME; | |
834 | if (unmap) | |
835 | cmd->cmnd[1] = 0x8; /* UNMAP */ | |
836 | put_unaligned_be32(sector, &cmd->cmnd[2]); | |
837 | put_unaligned_be16(nr_sectors, &cmd->cmnd[7]); | |
6a7b4398 | 838 | |
e4200f8e | 839 | cmd->allowed = SD_MAX_RETRIES; |
81d926e8 | 840 | cmd->transfersize = data_len; |
02d26103 | 841 | rq->timeout = unmap ? SD_TIMEOUT : SD_WRITE_SAME_TIMEOUT; |
81d926e8 | 842 | scsi_req(rq)->resid_len = data_len; |
6a7b4398 | 843 | |
81d926e8 | 844 | return scsi_init_io(cmd); |
f1126e95 | 845 | } |
f9d03f96 | 846 | |
02d26103 CH |
847 | static int sd_setup_write_zeroes_cmnd(struct scsi_cmnd *cmd) |
848 | { | |
849 | struct request *rq = cmd->request; | |
850 | struct scsi_device *sdp = cmd->device; | |
851 | struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); | |
852 | u64 sector = blk_rq_pos(rq) >> (ilog2(sdp->sector_size) - 9); | |
853 | u32 nr_sectors = blk_rq_sectors(rq) >> (ilog2(sdp->sector_size) - 9); | |
854 | ||
e4b87837 | 855 | if (!(rq->cmd_flags & REQ_NOUNMAP)) { |
e6bd9312 MP |
856 | switch (sdkp->zeroing_mode) { |
857 | case SD_ZERO_WS16_UNMAP: | |
39051dd8 | 858 | return sd_setup_write_same16_cmnd(cmd, true); |
e6bd9312 | 859 | case SD_ZERO_WS10_UNMAP: |
39051dd8 | 860 | return sd_setup_write_same10_cmnd(cmd, true); |
e4b87837 CH |
861 | } |
862 | } | |
c98a0eb0 | 863 | |
02d26103 CH |
864 | if (sdp->no_write_same) |
865 | return BLKPREP_INVALID; | |
ed44fd7f | 866 | |
02d26103 | 867 | if (sdkp->ws16 || sector > 0xffffffff || nr_sectors > 0xffff) |
39051dd8 | 868 | return sd_setup_write_same16_cmnd(cmd, false); |
ed44fd7f | 869 | |
39051dd8 | 870 | return sd_setup_write_same10_cmnd(cmd, false); |
f1126e95 FT |
871 | } |
872 | ||
5db44863 MP |
873 | static void sd_config_write_same(struct scsi_disk *sdkp) |
874 | { | |
875 | struct request_queue *q = sdkp->disk->queue; | |
876 | unsigned int logical_block_size = sdkp->device->sector_size; | |
5db44863 MP |
877 | |
878 | if (sdkp->device->no_write_same) { | |
879 | sdkp->max_ws_blocks = 0; | |
880 | goto out; | |
881 | } | |
882 | ||
883 | /* Some devices can not handle block counts above 0xffff despite | |
884 | * supporting WRITE SAME(16). Consequently we default to 64k | |
885 | * blocks per I/O unless the device explicitly advertises a | |
886 | * bigger limit. | |
887 | */ | |
66c28f97 MP |
888 | if (sdkp->max_ws_blocks > SD_MAX_WS10_BLOCKS) |
889 | sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks, | |
890 | (u32)SD_MAX_WS16_BLOCKS); | |
891 | else if (sdkp->ws16 || sdkp->ws10 || sdkp->device->no_report_opcodes) | |
892 | sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks, | |
893 | (u32)SD_MAX_WS10_BLOCKS); | |
894 | else { | |
895 | sdkp->device->no_write_same = 1; | |
896 | sdkp->max_ws_blocks = 0; | |
897 | } | |
5db44863 | 898 | |
e6bd9312 MP |
899 | if (sdkp->lbprz && sdkp->lbpws) |
900 | sdkp->zeroing_mode = SD_ZERO_WS16_UNMAP; | |
901 | else if (sdkp->lbprz && sdkp->lbpws10) | |
902 | sdkp->zeroing_mode = SD_ZERO_WS10_UNMAP; | |
903 | else if (sdkp->max_ws_blocks) | |
904 | sdkp->zeroing_mode = SD_ZERO_WS; | |
905 | else | |
906 | sdkp->zeroing_mode = SD_ZERO_WRITE; | |
907 | ||
b7af62a9 DLM |
908 | if (sdkp->max_ws_blocks && |
909 | sdkp->physical_block_size > logical_block_size) { | |
910 | /* | |
911 | * Reporting a maximum number of blocks that is not aligned | |
912 | * on the device physical size would cause a large write same | |
913 | * request to be split into physically unaligned chunks by | |
914 | * __blkdev_issue_write_zeroes() and __blkdev_issue_write_same() | |
915 | * even if the caller of these functions took care to align the | |
916 | * large request. So make sure the maximum reported is aligned | |
917 | * to the device physical block size. This is only an optional | |
918 | * optimization for regular disks, but this is mandatory to | |
919 | * avoid failure of large write same requests directed at | |
920 | * sequential write required zones of host-managed ZBC disks. | |
921 | */ | |
922 | sdkp->max_ws_blocks = | |
923 | round_down(sdkp->max_ws_blocks, | |
924 | bytes_to_logical(sdkp->device, | |
925 | sdkp->physical_block_size)); | |
926 | } | |
927 | ||
5db44863 | 928 | out: |
66c28f97 MP |
929 | blk_queue_max_write_same_sectors(q, sdkp->max_ws_blocks * |
930 | (logical_block_size >> 9)); | |
02d26103 CH |
931 | blk_queue_max_write_zeroes_sectors(q, sdkp->max_ws_blocks * |
932 | (logical_block_size >> 9)); | |
5db44863 MP |
933 | } |
934 | ||
935 | /** | |
936 | * sd_setup_write_same_cmnd - write the same data to multiple blocks | |
59b1134c | 937 | * @cmd: command to prepare |
5db44863 | 938 | * |
7529fbb0 DLM |
939 | * Will set up either WRITE SAME(10) or WRITE SAME(16) depending on |
940 | * the preference indicated by the target device. | |
5db44863 | 941 | **/ |
59b1134c | 942 | static int sd_setup_write_same_cmnd(struct scsi_cmnd *cmd) |
5db44863 | 943 | { |
59b1134c CH |
944 | struct request *rq = cmd->request; |
945 | struct scsi_device *sdp = cmd->device; | |
5db44863 MP |
946 | struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); |
947 | struct bio *bio = rq->bio; | |
948 | sector_t sector = blk_rq_pos(rq); | |
949 | unsigned int nr_sectors = blk_rq_sectors(rq); | |
08965c2e | 950 | unsigned int nr_bytes = blk_rq_bytes(rq); |
5db44863 MP |
951 | int ret; |
952 | ||
953 | if (sdkp->device->no_write_same) | |
0fb5b1fb | 954 | return BLKPREP_INVALID; |
5db44863 | 955 | |
a4ad39b1 | 956 | BUG_ON(bio_offset(bio) || bio_iovec(bio).bv_len != sdp->sector_size); |
5db44863 MP |
957 | |
958 | sector >>= ilog2(sdp->sector_size) - 9; | |
959 | nr_sectors >>= ilog2(sdp->sector_size) - 9; | |
960 | ||
5db44863 | 961 | rq->timeout = SD_WRITE_SAME_TIMEOUT; |
5db44863 MP |
962 | |
963 | if (sdkp->ws16 || sector > 0xffffffff || nr_sectors > 0xffff) { | |
59b1134c CH |
964 | cmd->cmd_len = 16; |
965 | cmd->cmnd[0] = WRITE_SAME_16; | |
966 | put_unaligned_be64(sector, &cmd->cmnd[2]); | |
967 | put_unaligned_be32(nr_sectors, &cmd->cmnd[10]); | |
5db44863 | 968 | } else { |
59b1134c CH |
969 | cmd->cmd_len = 10; |
970 | cmd->cmnd[0] = WRITE_SAME; | |
971 | put_unaligned_be32(sector, &cmd->cmnd[2]); | |
972 | put_unaligned_be16(nr_sectors, &cmd->cmnd[7]); | |
5db44863 MP |
973 | } |
974 | ||
59b1134c | 975 | cmd->transfersize = sdp->sector_size; |
a25ee548 | 976 | cmd->allowed = SD_MAX_RETRIES; |
08965c2e BVA |
977 | |
978 | /* | |
979 | * For WRITE SAME the data transferred via the DATA OUT buffer is | |
980 | * different from the amount of data actually written to the target. | |
981 | * | |
982 | * We set up __data_len to the amount of data transferred via the | |
983 | * DATA OUT buffer so that blk_rq_map_sg sets up the proper S/G list | |
984 | * to transfer a single sector of data first, but then reset it to | |
985 | * the amount of data to be written right after so that the I/O path | |
986 | * knows how much to actually write. | |
987 | */ | |
988 | rq->__data_len = sdp->sector_size; | |
989 | ret = scsi_init_io(cmd); | |
990 | rq->__data_len = nr_bytes; | |
29f6ca69 | 991 | |
08965c2e | 992 | return ret; |
5db44863 MP |
993 | } |
994 | ||
a118c6c1 | 995 | static int sd_setup_flush_cmnd(struct scsi_cmnd *cmd) |
90467c29 | 996 | { |
a118c6c1 CH |
997 | struct request *rq = cmd->request; |
998 | ||
999 | /* flush requests don't perform I/O, zero the S/G table */ | |
1000 | memset(&cmd->sdb, 0, sizeof(cmd->sdb)); | |
90467c29 | 1001 | |
a118c6c1 CH |
1002 | cmd->cmnd[0] = SYNCHRONIZE_CACHE; |
1003 | cmd->cmd_len = 10; | |
1004 | cmd->transfersize = 0; | |
1005 | cmd->allowed = SD_MAX_RETRIES; | |
1006 | ||
26b9fd8b | 1007 | rq->timeout = rq->q->rq_timeout * SD_FLUSH_TIMEOUT_MULTIPLIER; |
a118c6c1 | 1008 | return BLKPREP_OK; |
90467c29 FT |
1009 | } |
1010 | ||
87949eee | 1011 | static int sd_setup_read_write_cmnd(struct scsi_cmnd *SCpnt) |
1da177e4 | 1012 | { |
a1b73fc1 CH |
1013 | struct request *rq = SCpnt->request; |
1014 | struct scsi_device *sdp = SCpnt->device; | |
776b23a0 | 1015 | struct gendisk *disk = rq->rq_disk; |
89d94756 | 1016 | struct scsi_disk *sdkp = scsi_disk(disk); |
83096ebf | 1017 | sector_t block = blk_rq_pos(rq); |
18351070 | 1018 | sector_t threshold; |
83096ebf | 1019 | unsigned int this_count = blk_rq_sectors(rq); |
c611529e MP |
1020 | unsigned int dif, dix; |
1021 | int ret; | |
4e7392ec | 1022 | unsigned char protect; |
7f9a6bc4 | 1023 | |
3c356bde | 1024 | ret = scsi_init_io(SCpnt); |
7f9a6bc4 | 1025 | if (ret != BLKPREP_OK) |
39051dd8 | 1026 | return ret; |
0624cbb1 | 1027 | WARN_ON_ONCE(SCpnt != rq->special); |
7f9a6bc4 JB |
1028 | |
1029 | /* from here on until we're complete, any goto out | |
1030 | * is used for a killable error condition */ | |
1031 | ret = BLKPREP_KILL; | |
1da177e4 | 1032 | |
a1b73fc1 CH |
1033 | SCSI_LOG_HLQUEUE(1, |
1034 | scmd_printk(KERN_INFO, SCpnt, | |
1035 | "%s: block=%llu, count=%d\n", | |
1036 | __func__, (unsigned long long)block, this_count)); | |
1da177e4 LT |
1037 | |
1038 | if (!sdp || !scsi_device_online(sdp) || | |
83096ebf | 1039 | block + blk_rq_sectors(rq) > get_capacity(disk)) { |
fa0d34be | 1040 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
83096ebf TH |
1041 | "Finishing %u sectors\n", |
1042 | blk_rq_sectors(rq))); | |
fa0d34be MP |
1043 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
1044 | "Retry with 0x%p\n", SCpnt)); | |
7f9a6bc4 | 1045 | goto out; |
1da177e4 LT |
1046 | } |
1047 | ||
1048 | if (sdp->changed) { | |
1049 | /* | |
1050 | * quietly refuse to do anything to a changed disc until | |
1051 | * the changed bit has been reset | |
1052 | */ | |
3ff5588d | 1053 | /* printk("SCSI disk has been changed or is not present. Prohibiting further I/O.\n"); */ |
7f9a6bc4 | 1054 | goto out; |
1da177e4 | 1055 | } |
7f9a6bc4 | 1056 | |
a0899d4d | 1057 | /* |
18351070 LT |
1058 | * Some SD card readers can't handle multi-sector accesses which touch |
1059 | * the last one or two hardware sectors. Split accesses as needed. | |
a0899d4d | 1060 | */ |
18351070 LT |
1061 | threshold = get_capacity(disk) - SD_LAST_BUGGY_SECTORS * |
1062 | (sdp->sector_size / 512); | |
1063 | ||
1064 | if (unlikely(sdp->last_sector_bug && block + this_count > threshold)) { | |
1065 | if (block < threshold) { | |
1066 | /* Access up to the threshold but not beyond */ | |
1067 | this_count = threshold - block; | |
1068 | } else { | |
1069 | /* Access only a single hardware sector */ | |
1070 | this_count = sdp->sector_size / 512; | |
1071 | } | |
1072 | } | |
a0899d4d | 1073 | |
fa0d34be MP |
1074 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, "block=%llu\n", |
1075 | (unsigned long long)block)); | |
1da177e4 LT |
1076 | |
1077 | /* | |
1078 | * If we have a 1K hardware sectorsize, prevent access to single | |
1079 | * 512 byte sectors. In theory we could handle this - in fact | |
1080 | * the scsi cdrom driver must be able to handle this because | |
1081 | * we typically use 1K blocksizes, and cdroms typically have | |
1082 | * 2K hardware sectorsizes. Of course, things are simpler | |
1083 | * with the cdrom, since it is read-only. For performance | |
1084 | * reasons, the filesystems should be able to handle this | |
1085 | * and not force the scsi disk driver to use bounce buffers | |
1086 | * for this. | |
1087 | */ | |
1088 | if (sdp->sector_size == 1024) { | |
83096ebf | 1089 | if ((block & 1) || (blk_rq_sectors(rq) & 1)) { |
e73aec82 MP |
1090 | scmd_printk(KERN_ERR, SCpnt, |
1091 | "Bad block number requested\n"); | |
7f9a6bc4 | 1092 | goto out; |
1da177e4 LT |
1093 | } else { |
1094 | block = block >> 1; | |
1095 | this_count = this_count >> 1; | |
1096 | } | |
1097 | } | |
1098 | if (sdp->sector_size == 2048) { | |
83096ebf | 1099 | if ((block & 3) || (blk_rq_sectors(rq) & 3)) { |
e73aec82 MP |
1100 | scmd_printk(KERN_ERR, SCpnt, |
1101 | "Bad block number requested\n"); | |
7f9a6bc4 | 1102 | goto out; |
1da177e4 LT |
1103 | } else { |
1104 | block = block >> 2; | |
1105 | this_count = this_count >> 2; | |
1106 | } | |
1107 | } | |
1108 | if (sdp->sector_size == 4096) { | |
83096ebf | 1109 | if ((block & 7) || (blk_rq_sectors(rq) & 7)) { |
e73aec82 MP |
1110 | scmd_printk(KERN_ERR, SCpnt, |
1111 | "Bad block number requested\n"); | |
7f9a6bc4 | 1112 | goto out; |
1da177e4 LT |
1113 | } else { |
1114 | block = block >> 3; | |
1115 | this_count = this_count >> 3; | |
1116 | } | |
1117 | } | |
1118 | if (rq_data_dir(rq) == WRITE) { | |
1da177e4 | 1119 | SCpnt->cmnd[0] = WRITE_6; |
af55ff67 | 1120 | |
8c579ab6 | 1121 | if (blk_integrity_rq(rq)) |
10c41ddd | 1122 | t10_pi_prepare(SCpnt->request, sdkp->protection_type); |
af55ff67 | 1123 | |
1da177e4 LT |
1124 | } else if (rq_data_dir(rq) == READ) { |
1125 | SCpnt->cmnd[0] = READ_6; | |
1da177e4 | 1126 | } else { |
ef295ecf | 1127 | scmd_printk(KERN_ERR, SCpnt, "Unknown command %d\n", req_op(rq)); |
7f9a6bc4 | 1128 | goto out; |
1da177e4 LT |
1129 | } |
1130 | ||
fa0d34be | 1131 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
83096ebf | 1132 | "%s %d/%u 512 byte blocks.\n", |
fa0d34be MP |
1133 | (rq_data_dir(rq) == WRITE) ? |
1134 | "writing" : "reading", this_count, | |
83096ebf | 1135 | blk_rq_sectors(rq))); |
1da177e4 | 1136 | |
c611529e MP |
1137 | dix = scsi_prot_sg_count(SCpnt); |
1138 | dif = scsi_host_dif_capable(SCpnt->device->host, sdkp->protection_type); | |
1139 | ||
1140 | if (dif || dix) | |
1141 | protect = sd_setup_protect_cmnd(SCpnt, dix, dif); | |
af55ff67 | 1142 | else |
4e7392ec MP |
1143 | protect = 0; |
1144 | ||
8475c811 | 1145 | if (protect && sdkp->protection_type == T10_PI_TYPE2_PROTECTION) { |
4e7392ec MP |
1146 | SCpnt->cmnd = mempool_alloc(sd_cdb_pool, GFP_ATOMIC); |
1147 | ||
1148 | if (unlikely(SCpnt->cmnd == NULL)) { | |
1149 | ret = BLKPREP_DEFER; | |
1150 | goto out; | |
1151 | } | |
af55ff67 | 1152 | |
4e7392ec MP |
1153 | SCpnt->cmd_len = SD_EXT_CDB_SIZE; |
1154 | memset(SCpnt->cmnd, 0, SCpnt->cmd_len); | |
1155 | SCpnt->cmnd[0] = VARIABLE_LENGTH_CMD; | |
1156 | SCpnt->cmnd[7] = 0x18; | |
1157 | SCpnt->cmnd[9] = (rq_data_dir(rq) == READ) ? READ_32 : WRITE_32; | |
33659ebb | 1158 | SCpnt->cmnd[10] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
4e7392ec MP |
1159 | |
1160 | /* LBA */ | |
1161 | SCpnt->cmnd[12] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0; | |
1162 | SCpnt->cmnd[13] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0; | |
1163 | SCpnt->cmnd[14] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0; | |
1164 | SCpnt->cmnd[15] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0; | |
1165 | SCpnt->cmnd[16] = (unsigned char) (block >> 24) & 0xff; | |
1166 | SCpnt->cmnd[17] = (unsigned char) (block >> 16) & 0xff; | |
1167 | SCpnt->cmnd[18] = (unsigned char) (block >> 8) & 0xff; | |
1168 | SCpnt->cmnd[19] = (unsigned char) block & 0xff; | |
1169 | ||
1170 | /* Expected Indirect LBA */ | |
1171 | SCpnt->cmnd[20] = (unsigned char) (block >> 24) & 0xff; | |
1172 | SCpnt->cmnd[21] = (unsigned char) (block >> 16) & 0xff; | |
1173 | SCpnt->cmnd[22] = (unsigned char) (block >> 8) & 0xff; | |
1174 | SCpnt->cmnd[23] = (unsigned char) block & 0xff; | |
1175 | ||
1176 | /* Transfer length */ | |
1177 | SCpnt->cmnd[28] = (unsigned char) (this_count >> 24) & 0xff; | |
1178 | SCpnt->cmnd[29] = (unsigned char) (this_count >> 16) & 0xff; | |
1179 | SCpnt->cmnd[30] = (unsigned char) (this_count >> 8) & 0xff; | |
1180 | SCpnt->cmnd[31] = (unsigned char) this_count & 0xff; | |
e430cbc8 | 1181 | } else if (sdp->use_16_for_rw || (this_count > 0xffff)) { |
1da177e4 | 1182 | SCpnt->cmnd[0] += READ_16 - READ_6; |
33659ebb | 1183 | SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
1da177e4 LT |
1184 | SCpnt->cmnd[2] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0; |
1185 | SCpnt->cmnd[3] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0; | |
1186 | SCpnt->cmnd[4] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0; | |
1187 | SCpnt->cmnd[5] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0; | |
1188 | SCpnt->cmnd[6] = (unsigned char) (block >> 24) & 0xff; | |
1189 | SCpnt->cmnd[7] = (unsigned char) (block >> 16) & 0xff; | |
1190 | SCpnt->cmnd[8] = (unsigned char) (block >> 8) & 0xff; | |
1191 | SCpnt->cmnd[9] = (unsigned char) block & 0xff; | |
1192 | SCpnt->cmnd[10] = (unsigned char) (this_count >> 24) & 0xff; | |
1193 | SCpnt->cmnd[11] = (unsigned char) (this_count >> 16) & 0xff; | |
1194 | SCpnt->cmnd[12] = (unsigned char) (this_count >> 8) & 0xff; | |
1195 | SCpnt->cmnd[13] = (unsigned char) this_count & 0xff; | |
1196 | SCpnt->cmnd[14] = SCpnt->cmnd[15] = 0; | |
1197 | } else if ((this_count > 0xff) || (block > 0x1fffff) || | |
af55ff67 | 1198 | scsi_device_protection(SCpnt->device) || |
1da177e4 | 1199 | SCpnt->device->use_10_for_rw) { |
1da177e4 | 1200 | SCpnt->cmnd[0] += READ_10 - READ_6; |
33659ebb | 1201 | SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
1da177e4 LT |
1202 | SCpnt->cmnd[2] = (unsigned char) (block >> 24) & 0xff; |
1203 | SCpnt->cmnd[3] = (unsigned char) (block >> 16) & 0xff; | |
1204 | SCpnt->cmnd[4] = (unsigned char) (block >> 8) & 0xff; | |
1205 | SCpnt->cmnd[5] = (unsigned char) block & 0xff; | |
1206 | SCpnt->cmnd[6] = SCpnt->cmnd[9] = 0; | |
1207 | SCpnt->cmnd[7] = (unsigned char) (this_count >> 8) & 0xff; | |
1208 | SCpnt->cmnd[8] = (unsigned char) this_count & 0xff; | |
1209 | } else { | |
33659ebb | 1210 | if (unlikely(rq->cmd_flags & REQ_FUA)) { |
007365ad TH |
1211 | /* |
1212 | * This happens only if this drive failed | |
1213 | * 10byte rw command with ILLEGAL_REQUEST | |
1214 | * during operation and thus turned off | |
1215 | * use_10_for_rw. | |
1216 | */ | |
e73aec82 MP |
1217 | scmd_printk(KERN_ERR, SCpnt, |
1218 | "FUA write on READ/WRITE(6) drive\n"); | |
7f9a6bc4 | 1219 | goto out; |
007365ad TH |
1220 | } |
1221 | ||
1da177e4 LT |
1222 | SCpnt->cmnd[1] |= (unsigned char) ((block >> 16) & 0x1f); |
1223 | SCpnt->cmnd[2] = (unsigned char) ((block >> 8) & 0xff); | |
1224 | SCpnt->cmnd[3] = (unsigned char) block & 0xff; | |
1225 | SCpnt->cmnd[4] = (unsigned char) this_count; | |
1226 | SCpnt->cmnd[5] = 0; | |
1227 | } | |
30b0c37b | 1228 | SCpnt->sdb.length = this_count * sdp->sector_size; |
1da177e4 LT |
1229 | |
1230 | /* | |
1231 | * We shouldn't disconnect in the middle of a sector, so with a dumb | |
1232 | * host adapter, it's safe to assume that we can at least transfer | |
1233 | * this many bytes between each connect / disconnect. | |
1234 | */ | |
1235 | SCpnt->transfersize = sdp->sector_size; | |
1236 | SCpnt->underflow = this_count << 9; | |
1237 | SCpnt->allowed = SD_MAX_RETRIES; | |
1da177e4 | 1238 | |
1da177e4 LT |
1239 | /* |
1240 | * This indicates that the command is ready from our end to be | |
1241 | * queued. | |
1242 | */ | |
7f9a6bc4 JB |
1243 | ret = BLKPREP_OK; |
1244 | out: | |
a1b73fc1 | 1245 | return ret; |
1da177e4 LT |
1246 | } |
1247 | ||
87949eee CH |
1248 | static int sd_init_command(struct scsi_cmnd *cmd) |
1249 | { | |
1250 | struct request *rq = cmd->request; | |
1251 | ||
c2df40df MC |
1252 | switch (req_op(rq)) { |
1253 | case REQ_OP_DISCARD: | |
81d926e8 CH |
1254 | switch (scsi_disk(rq->rq_disk)->provisioning_mode) { |
1255 | case SD_LBP_UNMAP: | |
1256 | return sd_setup_unmap_cmnd(cmd); | |
1257 | case SD_LBP_WS16: | |
02d26103 | 1258 | return sd_setup_write_same16_cmnd(cmd, true); |
81d926e8 CH |
1259 | case SD_LBP_WS10: |
1260 | return sd_setup_write_same10_cmnd(cmd, true); | |
1261 | case SD_LBP_ZERO: | |
1262 | return sd_setup_write_same10_cmnd(cmd, false); | |
1263 | default: | |
1264 | return BLKPREP_INVALID; | |
1265 | } | |
02d26103 CH |
1266 | case REQ_OP_WRITE_ZEROES: |
1267 | return sd_setup_write_zeroes_cmnd(cmd); | |
c2df40df | 1268 | case REQ_OP_WRITE_SAME: |
87949eee | 1269 | return sd_setup_write_same_cmnd(cmd); |
3a5e02ce | 1270 | case REQ_OP_FLUSH: |
87949eee | 1271 | return sd_setup_flush_cmnd(cmd); |
c2df40df MC |
1272 | case REQ_OP_READ: |
1273 | case REQ_OP_WRITE: | |
87949eee | 1274 | return sd_setup_read_write_cmnd(cmd); |
89d94756 HR |
1275 | case REQ_OP_ZONE_RESET: |
1276 | return sd_zbc_setup_reset_cmnd(cmd); | |
c2df40df | 1277 | default: |
f1f1fada JT |
1278 | WARN_ON_ONCE(1); |
1279 | return BLKPREP_KILL; | |
c2df40df | 1280 | } |
87949eee CH |
1281 | } |
1282 | ||
1283 | static void sd_uninit_command(struct scsi_cmnd *SCpnt) | |
1284 | { | |
1285 | struct request *rq = SCpnt->request; | |
14e3062f | 1286 | u8 *cmnd; |
87949eee | 1287 | |
f9d03f96 CH |
1288 | if (rq->rq_flags & RQF_SPECIAL_PAYLOAD) |
1289 | __free_page(rq->special_vec.bv_page); | |
87949eee | 1290 | |
82ed4db4 | 1291 | if (SCpnt->cmnd != scsi_req(rq)->cmd) { |
14e3062f | 1292 | cmnd = SCpnt->cmnd; |
87949eee CH |
1293 | SCpnt->cmnd = NULL; |
1294 | SCpnt->cmd_len = 0; | |
14e3062f | 1295 | mempool_free(cmnd, sd_cdb_pool); |
87949eee CH |
1296 | } |
1297 | } | |
1298 | ||
1da177e4 LT |
1299 | /** |
1300 | * sd_open - open a scsi disk device | |
7529fbb0 DLM |
1301 | * @bdev: Block device of the scsi disk to open |
1302 | * @mode: FMODE_* mask | |
1da177e4 LT |
1303 | * |
1304 | * Returns 0 if successful. Returns a negated errno value in case | |
1305 | * of error. | |
1306 | * | |
1307 | * Note: This can be called from a user context (e.g. fsck(1) ) | |
1308 | * or from within the kernel (e.g. as a result of a mount(1) ). | |
1309 | * In the latter case @inode and @filp carry an abridged amount | |
1310 | * of information as noted above. | |
409f3499 AB |
1311 | * |
1312 | * Locking: called with bdev->bd_mutex held. | |
1da177e4 | 1313 | **/ |
0338e291 | 1314 | static int sd_open(struct block_device *bdev, fmode_t mode) |
1da177e4 | 1315 | { |
0338e291 | 1316 | struct scsi_disk *sdkp = scsi_disk_get(bdev->bd_disk); |
1da177e4 LT |
1317 | struct scsi_device *sdev; |
1318 | int retval; | |
1319 | ||
0338e291 | 1320 | if (!sdkp) |
1da177e4 LT |
1321 | return -ENXIO; |
1322 | ||
fa0d34be | 1323 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_open\n")); |
1da177e4 LT |
1324 | |
1325 | sdev = sdkp->device; | |
1326 | ||
1327 | /* | |
1328 | * If the device is in error recovery, wait until it is done. | |
1329 | * If the device is offline, then disallow any access to it. | |
1330 | */ | |
1331 | retval = -ENXIO; | |
1332 | if (!scsi_block_when_processing_errors(sdev)) | |
1333 | goto error_out; | |
1334 | ||
1335 | if (sdev->removable || sdkp->write_prot) | |
0338e291 | 1336 | check_disk_change(bdev); |
1da177e4 LT |
1337 | |
1338 | /* | |
1339 | * If the drive is empty, just let the open fail. | |
1340 | */ | |
1341 | retval = -ENOMEDIUM; | |
0338e291 | 1342 | if (sdev->removable && !sdkp->media_present && !(mode & FMODE_NDELAY)) |
1da177e4 LT |
1343 | goto error_out; |
1344 | ||
1345 | /* | |
1346 | * If the device has the write protect tab set, have the open fail | |
1347 | * if the user expects to be able to write to the thing. | |
1348 | */ | |
1349 | retval = -EROFS; | |
0338e291 | 1350 | if (sdkp->write_prot && (mode & FMODE_WRITE)) |
1da177e4 LT |
1351 | goto error_out; |
1352 | ||
1353 | /* | |
1354 | * It is possible that the disk changing stuff resulted in | |
1355 | * the device being taken offline. If this is the case, | |
1356 | * report this to the user, and don't pretend that the | |
1357 | * open actually succeeded. | |
1358 | */ | |
1359 | retval = -ENXIO; | |
1360 | if (!scsi_device_online(sdev)) | |
1361 | goto error_out; | |
1362 | ||
409f3499 | 1363 | if ((atomic_inc_return(&sdkp->openers) == 1) && sdev->removable) { |
1da177e4 LT |
1364 | if (scsi_block_when_processing_errors(sdev)) |
1365 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT); | |
1366 | } | |
1367 | ||
1368 | return 0; | |
1369 | ||
1370 | error_out: | |
1371 | scsi_disk_put(sdkp); | |
1372 | return retval; | |
1373 | } | |
1374 | ||
1375 | /** | |
1376 | * sd_release - invoked when the (last) close(2) is called on this | |
1377 | * scsi disk. | |
7529fbb0 DLM |
1378 | * @disk: disk to release |
1379 | * @mode: FMODE_* mask | |
1da177e4 LT |
1380 | * |
1381 | * Returns 0. | |
1382 | * | |
1383 | * Note: may block (uninterruptible) if error recovery is underway | |
1384 | * on this disk. | |
409f3499 AB |
1385 | * |
1386 | * Locking: called with bdev->bd_mutex held. | |
1da177e4 | 1387 | **/ |
db2a144b | 1388 | static void sd_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 1389 | { |
1da177e4 LT |
1390 | struct scsi_disk *sdkp = scsi_disk(disk); |
1391 | struct scsi_device *sdev = sdkp->device; | |
1392 | ||
56937f7b | 1393 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_release\n")); |
1da177e4 | 1394 | |
7e443312 | 1395 | if (atomic_dec_return(&sdkp->openers) == 0 && sdev->removable) { |
1da177e4 LT |
1396 | if (scsi_block_when_processing_errors(sdev)) |
1397 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW); | |
1398 | } | |
1399 | ||
1400 | /* | |
1401 | * XXX and what if there are packets in flight and this close() | |
1402 | * XXX is followed by a "rmmod sd_mod"? | |
1403 | */ | |
478a8a05 | 1404 | |
1da177e4 | 1405 | scsi_disk_put(sdkp); |
1da177e4 LT |
1406 | } |
1407 | ||
a885c8c4 | 1408 | static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
1da177e4 LT |
1409 | { |
1410 | struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk); | |
1411 | struct scsi_device *sdp = sdkp->device; | |
1412 | struct Scsi_Host *host = sdp->host; | |
f08bb1e0 | 1413 | sector_t capacity = logical_to_sectors(sdp, sdkp->capacity); |
1da177e4 LT |
1414 | int diskinfo[4]; |
1415 | ||
1416 | /* default to most commonly used values */ | |
f08bb1e0 MP |
1417 | diskinfo[0] = 0x40; /* 1 << 6 */ |
1418 | diskinfo[1] = 0x20; /* 1 << 5 */ | |
1419 | diskinfo[2] = capacity >> 11; | |
1420 | ||
1da177e4 LT |
1421 | /* override with calculated, extended default, or driver values */ |
1422 | if (host->hostt->bios_param) | |
f08bb1e0 | 1423 | host->hostt->bios_param(sdp, bdev, capacity, diskinfo); |
1da177e4 | 1424 | else |
f08bb1e0 | 1425 | scsicam_bios_param(bdev, capacity, diskinfo); |
1da177e4 | 1426 | |
a885c8c4 CH |
1427 | geo->heads = diskinfo[0]; |
1428 | geo->sectors = diskinfo[1]; | |
1429 | geo->cylinders = diskinfo[2]; | |
1da177e4 LT |
1430 | return 0; |
1431 | } | |
1432 | ||
1433 | /** | |
1434 | * sd_ioctl - process an ioctl | |
7529fbb0 DLM |
1435 | * @bdev: target block device |
1436 | * @mode: FMODE_* mask | |
1da177e4 LT |
1437 | * @cmd: ioctl command number |
1438 | * @arg: this is third argument given to ioctl(2) system call. | |
1439 | * Often contains a pointer. | |
1440 | * | |
25985edc | 1441 | * Returns 0 if successful (some ioctls return positive numbers on |
1da177e4 LT |
1442 | * success as well). Returns a negated errno value in case of error. |
1443 | * | |
1444 | * Note: most ioctls are forward onto the block subsystem or further | |
3a4fa0a2 | 1445 | * down in the scsi subsystem. |
1da177e4 | 1446 | **/ |
0338e291 | 1447 | static int sd_ioctl(struct block_device *bdev, fmode_t mode, |
1da177e4 LT |
1448 | unsigned int cmd, unsigned long arg) |
1449 | { | |
1da177e4 | 1450 | struct gendisk *disk = bdev->bd_disk; |
fe2d1851 NN |
1451 | struct scsi_disk *sdkp = scsi_disk(disk); |
1452 | struct scsi_device *sdp = sdkp->device; | |
1da177e4 LT |
1453 | void __user *p = (void __user *)arg; |
1454 | int error; | |
1455 | ||
fe2d1851 NN |
1456 | SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO, sdkp, "sd_ioctl: disk=%s, " |
1457 | "cmd=0x%x\n", disk->disk_name, cmd)); | |
1da177e4 | 1458 | |
0bfc96cb PB |
1459 | error = scsi_verify_blk_ioctl(bdev, cmd); |
1460 | if (error < 0) | |
1461 | return error; | |
1462 | ||
1da177e4 LT |
1463 | /* |
1464 | * If we are in the middle of error recovery, don't let anyone | |
1465 | * else try and use this device. Also, if error recovery fails, it | |
1466 | * may try and take the device offline, in which case all further | |
1467 | * access to the device is prohibited. | |
1468 | */ | |
906d15fb CH |
1469 | error = scsi_ioctl_block_when_processing_errors(sdp, cmd, |
1470 | (mode & FMODE_NDELAY) != 0); | |
1471 | if (error) | |
8a6cfeb6 | 1472 | goto out; |
1da177e4 | 1473 | |
d80210f2 CH |
1474 | if (is_sed_ioctl(cmd)) |
1475 | return sed_ioctl(sdkp->opal_dev, cmd, p); | |
1476 | ||
1da177e4 LT |
1477 | /* |
1478 | * Send SCSI addressing ioctls directly to mid level, send other | |
1479 | * ioctls to block level and then onto mid level if they can't be | |
1480 | * resolved. | |
1481 | */ | |
1482 | switch (cmd) { | |
1483 | case SCSI_IOCTL_GET_IDLUN: | |
1484 | case SCSI_IOCTL_GET_BUS_NUMBER: | |
8a6cfeb6 AB |
1485 | error = scsi_ioctl(sdp, cmd, p); |
1486 | break; | |
1da177e4 | 1487 | default: |
577ebb37 | 1488 | error = scsi_cmd_blk_ioctl(bdev, mode, cmd, p); |
1da177e4 | 1489 | if (error != -ENOTTY) |
8a6cfeb6 AB |
1490 | break; |
1491 | error = scsi_ioctl(sdp, cmd, p); | |
1492 | break; | |
1da177e4 | 1493 | } |
8a6cfeb6 | 1494 | out: |
8a6cfeb6 | 1495 | return error; |
1da177e4 LT |
1496 | } |
1497 | ||
1498 | static void set_media_not_present(struct scsi_disk *sdkp) | |
1499 | { | |
2bae0093 TH |
1500 | if (sdkp->media_present) |
1501 | sdkp->device->changed = 1; | |
1502 | ||
1503 | if (sdkp->device->removable) { | |
1504 | sdkp->media_present = 0; | |
1505 | sdkp->capacity = 0; | |
1506 | } | |
1507 | } | |
1508 | ||
1509 | static int media_not_present(struct scsi_disk *sdkp, | |
1510 | struct scsi_sense_hdr *sshdr) | |
1511 | { | |
1512 | if (!scsi_sense_valid(sshdr)) | |
1513 | return 0; | |
1514 | ||
1515 | /* not invoked for commands that could return deferred errors */ | |
1516 | switch (sshdr->sense_key) { | |
1517 | case UNIT_ATTENTION: | |
1518 | case NOT_READY: | |
1519 | /* medium not present */ | |
1520 | if (sshdr->asc == 0x3A) { | |
1521 | set_media_not_present(sdkp); | |
1522 | return 1; | |
1523 | } | |
1524 | } | |
1525 | return 0; | |
1da177e4 LT |
1526 | } |
1527 | ||
1528 | /** | |
2bae0093 TH |
1529 | * sd_check_events - check media events |
1530 | * @disk: kernel device descriptor | |
1531 | * @clearing: disk events currently being cleared | |
1da177e4 | 1532 | * |
2bae0093 | 1533 | * Returns mask of DISK_EVENT_*. |
1da177e4 LT |
1534 | * |
1535 | * Note: this function is invoked from the block subsystem. | |
1536 | **/ | |
2bae0093 | 1537 | static unsigned int sd_check_events(struct gendisk *disk, unsigned int clearing) |
1da177e4 | 1538 | { |
eb72d0bb HR |
1539 | struct scsi_disk *sdkp = scsi_disk_get(disk); |
1540 | struct scsi_device *sdp; | |
1da177e4 LT |
1541 | int retval; |
1542 | ||
eb72d0bb HR |
1543 | if (!sdkp) |
1544 | return 0; | |
1545 | ||
1546 | sdp = sdkp->device; | |
2bae0093 | 1547 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_check_events\n")); |
1da177e4 LT |
1548 | |
1549 | /* | |
1550 | * If the device is offline, don't send any commands - just pretend as | |
1551 | * if the command failed. If the device ever comes back online, we | |
1552 | * can deal with it then. It is only because of unrecoverable errors | |
1553 | * that we would ever take a device offline in the first place. | |
1554 | */ | |
285e9670 KS |
1555 | if (!scsi_device_online(sdp)) { |
1556 | set_media_not_present(sdkp); | |
285e9670 KS |
1557 | goto out; |
1558 | } | |
1da177e4 LT |
1559 | |
1560 | /* | |
1561 | * Using TEST_UNIT_READY enables differentiation between drive with | |
1562 | * no cartridge loaded - NOT READY, drive with changed cartridge - | |
1563 | * UNIT ATTENTION, or with same cartridge - GOOD STATUS. | |
1564 | * | |
1565 | * Drives that auto spin down. eg iomega jaz 1G, will be started | |
1566 | * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever | |
1567 | * sd_revalidate() is called. | |
1568 | */ | |
001aac25 | 1569 | if (scsi_block_when_processing_errors(sdp)) { |
6fa2b8f9 CH |
1570 | struct scsi_sense_hdr sshdr = { 0, }; |
1571 | ||
001aac25 | 1572 | retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, SD_MAX_RETRIES, |
6fa2b8f9 | 1573 | &sshdr); |
1da177e4 | 1574 | |
6fa2b8f9 CH |
1575 | /* failed to execute TUR, assume media not present */ |
1576 | if (host_byte(retval)) { | |
1577 | set_media_not_present(sdkp); | |
1578 | goto out; | |
1579 | } | |
1da177e4 | 1580 | |
6fa2b8f9 CH |
1581 | if (media_not_present(sdkp, &sshdr)) |
1582 | goto out; | |
1583 | } | |
2bae0093 | 1584 | |
1da177e4 LT |
1585 | /* |
1586 | * For removable scsi disk we have to recognise the presence | |
2bae0093 | 1587 | * of a disk in the drive. |
1da177e4 | 1588 | */ |
2bae0093 TH |
1589 | if (!sdkp->media_present) |
1590 | sdp->changed = 1; | |
1da177e4 | 1591 | sdkp->media_present = 1; |
285e9670 | 1592 | out: |
3ff5588d | 1593 | /* |
2bae0093 | 1594 | * sdp->changed is set under the following conditions: |
3ff5588d | 1595 | * |
2bae0093 TH |
1596 | * Medium present state has changed in either direction. |
1597 | * Device has indicated UNIT_ATTENTION. | |
3ff5588d | 1598 | */ |
2bae0093 TH |
1599 | retval = sdp->changed ? DISK_EVENT_MEDIA_CHANGE : 0; |
1600 | sdp->changed = 0; | |
eb72d0bb | 1601 | scsi_disk_put(sdkp); |
1da177e4 | 1602 | return retval; |
1da177e4 LT |
1603 | } |
1604 | ||
4fa83244 | 1605 | static int sd_sync_cache(struct scsi_disk *sdkp, struct scsi_sense_hdr *sshdr) |
1da177e4 | 1606 | { |
1da177e4 | 1607 | int retries, res; |
e73aec82 | 1608 | struct scsi_device *sdp = sdkp->device; |
7e660100 JB |
1609 | const int timeout = sdp->request_queue->rq_timeout |
1610 | * SD_FLUSH_TIMEOUT_MULTIPLIER; | |
4fa83244 | 1611 | struct scsi_sense_hdr my_sshdr; |
1da177e4 LT |
1612 | |
1613 | if (!scsi_device_online(sdp)) | |
1614 | return -ENODEV; | |
1615 | ||
4fa83244 DB |
1616 | /* caller might not be interested in sense, but we need it */ |
1617 | if (!sshdr) | |
1618 | sshdr = &my_sshdr; | |
1619 | ||
1da177e4 LT |
1620 | for (retries = 3; retries > 0; --retries) { |
1621 | unsigned char cmd[10] = { 0 }; | |
1622 | ||
1623 | cmd[0] = SYNCHRONIZE_CACHE; | |
1624 | /* | |
1625 | * Leave the rest of the command zero to indicate | |
1626 | * flush everything. | |
1627 | */ | |
4fa83244 | 1628 | res = scsi_execute(sdp, cmd, DMA_NONE, NULL, 0, NULL, sshdr, |
fcbfffe2 | 1629 | timeout, SD_MAX_RETRIES, 0, RQF_PM, NULL); |
ea73a9f2 | 1630 | if (res == 0) |
1da177e4 LT |
1631 | break; |
1632 | } | |
1633 | ||
e73aec82 | 1634 | if (res) { |
ef61329d | 1635 | sd_print_result(sdkp, "Synchronize Cache(10) failed", res); |
95897910 | 1636 | |
c65be1a6 | 1637 | if (driver_byte(res) == DRIVER_SENSE) |
4fa83244 DB |
1638 | sd_print_sense_hdr(sdkp, sshdr); |
1639 | ||
95897910 | 1640 | /* we need to evaluate the error return */ |
4fa83244 DB |
1641 | if (scsi_sense_valid(sshdr) && |
1642 | (sshdr->asc == 0x3a || /* medium not present */ | |
1643 | sshdr->asc == 0x20)) /* invalid command */ | |
95897910 ON |
1644 | /* this is no error here */ |
1645 | return 0; | |
1646 | ||
1647 | switch (host_byte(res)) { | |
1648 | /* ignore errors due to racing a disconnection */ | |
1649 | case DID_BAD_TARGET: | |
1650 | case DID_NO_CONNECT: | |
1651 | return 0; | |
1652 | /* signal the upper layer it might try again */ | |
1653 | case DID_BUS_BUSY: | |
1654 | case DID_IMM_RETRY: | |
1655 | case DID_REQUEUE: | |
1656 | case DID_SOFT_ERROR: | |
1657 | return -EBUSY; | |
1658 | default: | |
1659 | return -EIO; | |
1660 | } | |
1da177e4 | 1661 | } |
3721050a | 1662 | return 0; |
1da177e4 LT |
1663 | } |
1664 | ||
1da177e4 LT |
1665 | static void sd_rescan(struct device *dev) |
1666 | { | |
3d9a1f53 | 1667 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
39b7f1e2 | 1668 | |
3d9a1f53 | 1669 | revalidate_disk(sdkp->disk); |
1da177e4 LT |
1670 | } |
1671 | ||
1672 | ||
1673 | #ifdef CONFIG_COMPAT | |
1674 | /* | |
1675 | * This gets directly called from VFS. When the ioctl | |
1676 | * is not recognized we go back to the other translation paths. | |
1677 | */ | |
0338e291 AV |
1678 | static int sd_compat_ioctl(struct block_device *bdev, fmode_t mode, |
1679 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1680 | { |
0338e291 | 1681 | struct scsi_device *sdev = scsi_disk(bdev->bd_disk)->device; |
21a9d4c9 | 1682 | int error; |
1da177e4 | 1683 | |
21a9d4c9 CH |
1684 | error = scsi_ioctl_block_when_processing_errors(sdev, cmd, |
1685 | (mode & FMODE_NDELAY) != 0); | |
1686 | if (error) | |
1687 | return error; | |
1da177e4 | 1688 | |
1da177e4 LT |
1689 | /* |
1690 | * Let the static ioctl translation table take care of it. | |
1691 | */ | |
21a9d4c9 CH |
1692 | if (!sdev->host->hostt->compat_ioctl) |
1693 | return -ENOIOCTLCMD; | |
1694 | return sdev->host->hostt->compat_ioctl(sdev, cmd, (void __user *)arg); | |
1da177e4 LT |
1695 | } |
1696 | #endif | |
1697 | ||
924d55b0 CH |
1698 | static char sd_pr_type(enum pr_type type) |
1699 | { | |
1700 | switch (type) { | |
1701 | case PR_WRITE_EXCLUSIVE: | |
1702 | return 0x01; | |
1703 | case PR_EXCLUSIVE_ACCESS: | |
1704 | return 0x03; | |
1705 | case PR_WRITE_EXCLUSIVE_REG_ONLY: | |
1706 | return 0x05; | |
1707 | case PR_EXCLUSIVE_ACCESS_REG_ONLY: | |
1708 | return 0x06; | |
1709 | case PR_WRITE_EXCLUSIVE_ALL_REGS: | |
1710 | return 0x07; | |
1711 | case PR_EXCLUSIVE_ACCESS_ALL_REGS: | |
1712 | return 0x08; | |
1713 | default: | |
1714 | return 0; | |
1715 | } | |
1716 | }; | |
1717 | ||
1718 | static int sd_pr_command(struct block_device *bdev, u8 sa, | |
1719 | u64 key, u64 sa_key, u8 type, u8 flags) | |
1720 | { | |
1721 | struct scsi_device *sdev = scsi_disk(bdev->bd_disk)->device; | |
1722 | struct scsi_sense_hdr sshdr; | |
1723 | int result; | |
1724 | u8 cmd[16] = { 0, }; | |
1725 | u8 data[24] = { 0, }; | |
1726 | ||
1727 | cmd[0] = PERSISTENT_RESERVE_OUT; | |
1728 | cmd[1] = sa; | |
1729 | cmd[2] = type; | |
1730 | put_unaligned_be32(sizeof(data), &cmd[5]); | |
1731 | ||
1732 | put_unaligned_be64(key, &data[0]); | |
1733 | put_unaligned_be64(sa_key, &data[8]); | |
1734 | data[20] = flags; | |
1735 | ||
1736 | result = scsi_execute_req(sdev, cmd, DMA_TO_DEVICE, &data, sizeof(data), | |
1737 | &sshdr, SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
1738 | ||
c65be1a6 JT |
1739 | if (driver_byte(result) == DRIVER_SENSE && |
1740 | scsi_sense_valid(&sshdr)) { | |
924d55b0 CH |
1741 | sdev_printk(KERN_INFO, sdev, "PR command failed: %d\n", result); |
1742 | scsi_print_sense_hdr(sdev, NULL, &sshdr); | |
1743 | } | |
1744 | ||
1745 | return result; | |
1746 | } | |
1747 | ||
1748 | static int sd_pr_register(struct block_device *bdev, u64 old_key, u64 new_key, | |
1749 | u32 flags) | |
1750 | { | |
1751 | if (flags & ~PR_FL_IGNORE_KEY) | |
1752 | return -EOPNOTSUPP; | |
1753 | return sd_pr_command(bdev, (flags & PR_FL_IGNORE_KEY) ? 0x06 : 0x00, | |
1754 | old_key, new_key, 0, | |
01f90dd9 | 1755 | (1 << 0) /* APTPL */); |
924d55b0 CH |
1756 | } |
1757 | ||
1758 | static int sd_pr_reserve(struct block_device *bdev, u64 key, enum pr_type type, | |
1759 | u32 flags) | |
1760 | { | |
1761 | if (flags) | |
1762 | return -EOPNOTSUPP; | |
1763 | return sd_pr_command(bdev, 0x01, key, 0, sd_pr_type(type), 0); | |
1764 | } | |
1765 | ||
1766 | static int sd_pr_release(struct block_device *bdev, u64 key, enum pr_type type) | |
1767 | { | |
1768 | return sd_pr_command(bdev, 0x02, key, 0, sd_pr_type(type), 0); | |
1769 | } | |
1770 | ||
1771 | static int sd_pr_preempt(struct block_device *bdev, u64 old_key, u64 new_key, | |
1772 | enum pr_type type, bool abort) | |
1773 | { | |
1774 | return sd_pr_command(bdev, abort ? 0x05 : 0x04, old_key, new_key, | |
1775 | sd_pr_type(type), 0); | |
1776 | } | |
1777 | ||
1778 | static int sd_pr_clear(struct block_device *bdev, u64 key) | |
1779 | { | |
1780 | return sd_pr_command(bdev, 0x03, key, 0, 0, 0); | |
1781 | } | |
1782 | ||
1783 | static const struct pr_ops sd_pr_ops = { | |
1784 | .pr_register = sd_pr_register, | |
1785 | .pr_reserve = sd_pr_reserve, | |
1786 | .pr_release = sd_pr_release, | |
1787 | .pr_preempt = sd_pr_preempt, | |
1788 | .pr_clear = sd_pr_clear, | |
1789 | }; | |
1790 | ||
83d5cde4 | 1791 | static const struct block_device_operations sd_fops = { |
1da177e4 | 1792 | .owner = THIS_MODULE, |
0338e291 AV |
1793 | .open = sd_open, |
1794 | .release = sd_release, | |
8a6cfeb6 | 1795 | .ioctl = sd_ioctl, |
a885c8c4 | 1796 | .getgeo = sd_getgeo, |
1da177e4 | 1797 | #ifdef CONFIG_COMPAT |
0338e291 | 1798 | .compat_ioctl = sd_compat_ioctl, |
1da177e4 | 1799 | #endif |
2bae0093 | 1800 | .check_events = sd_check_events, |
1da177e4 | 1801 | .revalidate_disk = sd_revalidate_disk, |
72ec24bd | 1802 | .unlock_native_capacity = sd_unlock_native_capacity, |
e76239a3 | 1803 | .report_zones = sd_zbc_report_zones, |
924d55b0 | 1804 | .pr_ops = &sd_pr_ops, |
1da177e4 LT |
1805 | }; |
1806 | ||
7a38dc0b HR |
1807 | /** |
1808 | * sd_eh_reset - reset error handling callback | |
1809 | * @scmd: sd-issued command that has failed | |
1810 | * | |
1811 | * This function is called by the SCSI midlayer before starting | |
1812 | * SCSI EH. When counting medium access failures we have to be | |
1813 | * careful to register it only only once per device and SCSI EH run; | |
1814 | * there might be several timed out commands which will cause the | |
1815 | * 'max_medium_access_timeouts' counter to trigger after the first | |
1816 | * SCSI EH run already and set the device to offline. | |
1817 | * So this function resets the internal counter before starting SCSI EH. | |
1818 | **/ | |
1819 | static void sd_eh_reset(struct scsi_cmnd *scmd) | |
1820 | { | |
1821 | struct scsi_disk *sdkp = scsi_disk(scmd->request->rq_disk); | |
1822 | ||
1823 | /* New SCSI EH run, reset gate variable */ | |
1824 | sdkp->ignore_medium_access_errors = false; | |
1825 | } | |
1826 | ||
18a4d0a2 MP |
1827 | /** |
1828 | * sd_eh_action - error handling callback | |
1829 | * @scmd: sd-issued command that has failed | |
18a4d0a2 MP |
1830 | * @eh_disp: The recovery disposition suggested by the midlayer |
1831 | * | |
2451079b JB |
1832 | * This function is called by the SCSI midlayer upon completion of an |
1833 | * error test command (currently TEST UNIT READY). The result of sending | |
1834 | * the eh command is passed in eh_disp. We're looking for devices that | |
1835 | * fail medium access commands but are OK with non access commands like | |
1836 | * test unit ready (so wrongly see the device as having a successful | |
1837 | * recovery) | |
18a4d0a2 | 1838 | **/ |
2451079b | 1839 | static int sd_eh_action(struct scsi_cmnd *scmd, int eh_disp) |
18a4d0a2 MP |
1840 | { |
1841 | struct scsi_disk *sdkp = scsi_disk(scmd->request->rq_disk); | |
0db6ca8a | 1842 | struct scsi_device *sdev = scmd->device; |
18a4d0a2 | 1843 | |
0db6ca8a | 1844 | if (!scsi_device_online(sdev) || |
2451079b JB |
1845 | !scsi_medium_access_command(scmd) || |
1846 | host_byte(scmd->result) != DID_TIME_OUT || | |
1847 | eh_disp != SUCCESS) | |
18a4d0a2 MP |
1848 | return eh_disp; |
1849 | ||
1850 | /* | |
1851 | * The device has timed out executing a medium access command. | |
1852 | * However, the TEST UNIT READY command sent during error | |
1853 | * handling completed successfully. Either the device is in the | |
1854 | * process of recovering or has it suffered an internal failure | |
1855 | * that prevents access to the storage medium. | |
1856 | */ | |
7a38dc0b HR |
1857 | if (!sdkp->ignore_medium_access_errors) { |
1858 | sdkp->medium_access_timed_out++; | |
1859 | sdkp->ignore_medium_access_errors = true; | |
1860 | } | |
18a4d0a2 MP |
1861 | |
1862 | /* | |
1863 | * If the device keeps failing read/write commands but TEST UNIT | |
1864 | * READY always completes successfully we assume that medium | |
1865 | * access is no longer possible and take the device offline. | |
1866 | */ | |
1867 | if (sdkp->medium_access_timed_out >= sdkp->max_medium_access_timeouts) { | |
1868 | scmd_printk(KERN_ERR, scmd, | |
1869 | "Medium access timeout failure. Offlining disk!\n"); | |
0db6ca8a BVA |
1870 | mutex_lock(&sdev->state_mutex); |
1871 | scsi_device_set_state(sdev, SDEV_OFFLINE); | |
1872 | mutex_unlock(&sdev->state_mutex); | |
18a4d0a2 | 1873 | |
e8f8d50e | 1874 | return SUCCESS; |
18a4d0a2 MP |
1875 | } |
1876 | ||
1877 | return eh_disp; | |
1878 | } | |
1879 | ||
af55ff67 MP |
1880 | static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd) |
1881 | { | |
6eadc612 DLM |
1882 | struct request *req = scmd->request; |
1883 | struct scsi_device *sdev = scmd->device; | |
1884 | unsigned int transferred, good_bytes; | |
1885 | u64 start_lba, end_lba, bad_lba; | |
1886 | ||
a8733c7b | 1887 | /* |
6eadc612 DLM |
1888 | * Some commands have a payload smaller than the device logical |
1889 | * block size (e.g. INQUIRY on a 4K disk). | |
a8733c7b | 1890 | */ |
6eadc612 | 1891 | if (scsi_bufflen(scmd) <= sdev->sector_size) |
af55ff67 MP |
1892 | return 0; |
1893 | ||
6eadc612 DLM |
1894 | /* Check if we have a 'bad_lba' information */ |
1895 | if (!scsi_get_sense_info_fld(scmd->sense_buffer, | |
1896 | SCSI_SENSE_BUFFERSIZE, | |
1897 | &bad_lba)) | |
af55ff67 MP |
1898 | return 0; |
1899 | ||
6eadc612 DLM |
1900 | /* |
1901 | * If the bad lba was reported incorrectly, we have no idea where | |
af55ff67 MP |
1902 | * the error is. |
1903 | */ | |
6eadc612 DLM |
1904 | start_lba = sectors_to_logical(sdev, blk_rq_pos(req)); |
1905 | end_lba = start_lba + bytes_to_logical(sdev, scsi_bufflen(scmd)); | |
1906 | if (bad_lba < start_lba || bad_lba >= end_lba) | |
af55ff67 MP |
1907 | return 0; |
1908 | ||
6eadc612 DLM |
1909 | /* |
1910 | * resid is optional but mostly filled in. When it's unused, | |
1911 | * its value is zero, so we assume the whole buffer transferred | |
af55ff67 | 1912 | */ |
6eadc612 DLM |
1913 | transferred = scsi_bufflen(scmd) - scsi_get_resid(scmd); |
1914 | ||
1915 | /* This computation should always be done in terms of the | |
1916 | * resolution of the device's medium. | |
af55ff67 | 1917 | */ |
6eadc612 DLM |
1918 | good_bytes = logical_to_bytes(sdev, bad_lba - start_lba); |
1919 | ||
a8733c7b | 1920 | return min(good_bytes, transferred); |
af55ff67 MP |
1921 | } |
1922 | ||
1da177e4 | 1923 | /** |
7b3d9545 | 1924 | * sd_done - bottom half handler: called when the lower level |
1da177e4 LT |
1925 | * driver has completed (successfully or otherwise) a scsi command. |
1926 | * @SCpnt: mid-level's per command structure. | |
1927 | * | |
1928 | * Note: potentially run from within an ISR. Must not block. | |
1929 | **/ | |
7b3d9545 | 1930 | static int sd_done(struct scsi_cmnd *SCpnt) |
1da177e4 LT |
1931 | { |
1932 | int result = SCpnt->result; | |
af55ff67 | 1933 | unsigned int good_bytes = result ? 0 : scsi_bufflen(SCpnt); |
c46f0917 DLM |
1934 | unsigned int sector_size = SCpnt->device->sector_size; |
1935 | unsigned int resid; | |
1da177e4 | 1936 | struct scsi_sense_hdr sshdr; |
4e7392ec | 1937 | struct scsi_disk *sdkp = scsi_disk(SCpnt->request->rq_disk); |
26e85fcd | 1938 | struct request *req = SCpnt->request; |
1da177e4 LT |
1939 | int sense_valid = 0; |
1940 | int sense_deferred = 0; | |
1da177e4 | 1941 | |
89d94756 HR |
1942 | switch (req_op(req)) { |
1943 | case REQ_OP_DISCARD: | |
02d26103 | 1944 | case REQ_OP_WRITE_ZEROES: |
89d94756 HR |
1945 | case REQ_OP_WRITE_SAME: |
1946 | case REQ_OP_ZONE_RESET: | |
26e85fcd MP |
1947 | if (!result) { |
1948 | good_bytes = blk_rq_bytes(req); | |
1949 | scsi_set_resid(SCpnt, 0); | |
1950 | } else { | |
1951 | good_bytes = 0; | |
1952 | scsi_set_resid(SCpnt, blk_rq_bytes(req)); | |
89d94756 HR |
1953 | } |
1954 | break; | |
c46f0917 DLM |
1955 | default: |
1956 | /* | |
1957 | * In case of bogus fw or device, we could end up having | |
1958 | * an unaligned partial completion. Check this here and force | |
1959 | * alignment. | |
1960 | */ | |
1961 | resid = scsi_get_resid(SCpnt); | |
1962 | if (resid & (sector_size - 1)) { | |
1963 | sd_printk(KERN_INFO, sdkp, | |
1964 | "Unaligned partial completion (resid=%u, sector_sz=%u)\n", | |
1965 | resid, sector_size); | |
1966 | resid = min(scsi_bufflen(SCpnt), | |
1967 | round_up(resid, sector_size)); | |
1968 | scsi_set_resid(SCpnt, resid); | |
1969 | } | |
26e85fcd | 1970 | } |
6a32a8ae | 1971 | |
1da177e4 LT |
1972 | if (result) { |
1973 | sense_valid = scsi_command_normalize_sense(SCpnt, &sshdr); | |
1974 | if (sense_valid) | |
1975 | sense_deferred = scsi_sense_is_deferred(&sshdr); | |
1976 | } | |
2a863ba8 DJ |
1977 | sdkp->medium_access_timed_out = 0; |
1978 | ||
03aba2f7 LT |
1979 | if (driver_byte(result) != DRIVER_SENSE && |
1980 | (!sense_valid || sense_deferred)) | |
1981 | goto out; | |
1982 | ||
1983 | switch (sshdr.sense_key) { | |
1984 | case HARDWARE_ERROR: | |
1985 | case MEDIUM_ERROR: | |
af55ff67 | 1986 | good_bytes = sd_completed_bytes(SCpnt); |
03aba2f7 LT |
1987 | break; |
1988 | case RECOVERED_ERROR: | |
af55ff67 MP |
1989 | good_bytes = scsi_bufflen(SCpnt); |
1990 | break; | |
10dab226 JW |
1991 | case NO_SENSE: |
1992 | /* This indicates a false check condition, so ignore it. An | |
1993 | * unknown amount of data was transferred so treat it as an | |
1994 | * error. | |
1995 | */ | |
10dab226 JW |
1996 | SCpnt->result = 0; |
1997 | memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); | |
1998 | break; | |
c98a0eb0 MP |
1999 | case ABORTED_COMMAND: |
2000 | if (sshdr.asc == 0x10) /* DIF: Target detected corruption */ | |
2001 | good_bytes = sd_completed_bytes(SCpnt); | |
2002 | break; | |
2003 | case ILLEGAL_REQUEST: | |
d227ec26 CH |
2004 | switch (sshdr.asc) { |
2005 | case 0x10: /* DIX: Host detected corruption */ | |
af55ff67 | 2006 | good_bytes = sd_completed_bytes(SCpnt); |
d227ec26 CH |
2007 | break; |
2008 | case 0x20: /* INVALID COMMAND OPCODE */ | |
2009 | case 0x24: /* INVALID FIELD IN CDB */ | |
2010 | switch (SCpnt->cmnd[0]) { | |
5db44863 MP |
2011 | case UNMAP: |
2012 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
2013 | break; | |
2014 | case WRITE_SAME_16: | |
2015 | case WRITE_SAME: | |
d227ec26 | 2016 | if (SCpnt->cmnd[1] & 8) { /* UNMAP */ |
5db44863 | 2017 | sd_config_discard(sdkp, SD_LBP_DISABLE); |
d227ec26 | 2018 | } else { |
5db44863 MP |
2019 | sdkp->device->no_write_same = 1; |
2020 | sd_config_write_same(sdkp); | |
e8064021 | 2021 | req->rq_flags |= RQF_QUIET; |
5db44863 | 2022 | } |
d227ec26 | 2023 | break; |
5db44863 MP |
2024 | } |
2025 | } | |
03aba2f7 LT |
2026 | break; |
2027 | default: | |
2028 | break; | |
1da177e4 | 2029 | } |
89d94756 | 2030 | |
03aba2f7 | 2031 | out: |
89d94756 HR |
2032 | if (sd_is_zoned(sdkp)) |
2033 | sd_zbc_complete(SCpnt, good_bytes, &sshdr); | |
2034 | ||
ef61329d HR |
2035 | SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO, SCpnt, |
2036 | "sd_done: completed %d of %d bytes\n", | |
2037 | good_bytes, scsi_bufflen(SCpnt))); | |
2038 | ||
10c41ddd MG |
2039 | if (rq_data_dir(SCpnt->request) == READ && scsi_prot_sg_count(SCpnt) && |
2040 | good_bytes) | |
2041 | t10_pi_complete(SCpnt->request, sdkp->protection_type, | |
2042 | good_bytes / scsi_prot_interval(SCpnt)); | |
af55ff67 | 2043 | |
7b3d9545 | 2044 | return good_bytes; |
1da177e4 LT |
2045 | } |
2046 | ||
1da177e4 LT |
2047 | /* |
2048 | * spinup disk - called only in sd_revalidate_disk() | |
2049 | */ | |
2050 | static void | |
e73aec82 | 2051 | sd_spinup_disk(struct scsi_disk *sdkp) |
ea73a9f2 | 2052 | { |
1da177e4 | 2053 | unsigned char cmd[10]; |
4451e472 | 2054 | unsigned long spintime_expire = 0; |
1da177e4 LT |
2055 | int retries, spintime; |
2056 | unsigned int the_result; | |
2057 | struct scsi_sense_hdr sshdr; | |
2058 | int sense_valid = 0; | |
2059 | ||
2060 | spintime = 0; | |
2061 | ||
2062 | /* Spin up drives, as required. Only do this at boot time */ | |
2063 | /* Spinup needs to be done for module loads too. */ | |
2064 | do { | |
2065 | retries = 0; | |
2066 | ||
2067 | do { | |
2068 | cmd[0] = TEST_UNIT_READY; | |
2069 | memset((void *) &cmd[1], 0, 9); | |
2070 | ||
ea73a9f2 JB |
2071 | the_result = scsi_execute_req(sdkp->device, cmd, |
2072 | DMA_NONE, NULL, 0, | |
2073 | &sshdr, SD_TIMEOUT, | |
f4f4e47e | 2074 | SD_MAX_RETRIES, NULL); |
1da177e4 | 2075 | |
b4d38e38 AS |
2076 | /* |
2077 | * If the drive has indicated to us that it | |
2078 | * doesn't have any media in it, don't bother | |
2079 | * with any more polling. | |
2080 | */ | |
2081 | if (media_not_present(sdkp, &sshdr)) | |
2082 | return; | |
2083 | ||
1da177e4 | 2084 | if (the_result) |
ea73a9f2 | 2085 | sense_valid = scsi_sense_valid(&sshdr); |
1da177e4 LT |
2086 | retries++; |
2087 | } while (retries < 3 && | |
2088 | (!scsi_status_is_good(the_result) || | |
c65be1a6 | 2089 | ((driver_byte(the_result) == DRIVER_SENSE) && |
1da177e4 LT |
2090 | sense_valid && sshdr.sense_key == UNIT_ATTENTION))); |
2091 | ||
c65be1a6 | 2092 | if (driver_byte(the_result) != DRIVER_SENSE) { |
1da177e4 LT |
2093 | /* no sense, TUR either succeeded or failed |
2094 | * with a status error */ | |
e73aec82 | 2095 | if(!spintime && !scsi_status_is_good(the_result)) { |
ef61329d HR |
2096 | sd_print_result(sdkp, "Test Unit Ready failed", |
2097 | the_result); | |
e73aec82 | 2098 | } |
1da177e4 LT |
2099 | break; |
2100 | } | |
ef61329d | 2101 | |
1da177e4 LT |
2102 | /* |
2103 | * The device does not want the automatic start to be issued. | |
2104 | */ | |
33dd6f92 | 2105 | if (sdkp->device->no_start_on_add) |
1da177e4 | 2106 | break; |
1da177e4 | 2107 | |
33dd6f92 MW |
2108 | if (sense_valid && sshdr.sense_key == NOT_READY) { |
2109 | if (sshdr.asc == 4 && sshdr.ascq == 3) | |
2110 | break; /* manual intervention required */ | |
2111 | if (sshdr.asc == 4 && sshdr.ascq == 0xb) | |
2112 | break; /* standby */ | |
2113 | if (sshdr.asc == 4 && sshdr.ascq == 0xc) | |
2114 | break; /* unavailable */ | |
505aa4b6 MR |
2115 | if (sshdr.asc == 4 && sshdr.ascq == 0x1b) |
2116 | break; /* sanitize in progress */ | |
33dd6f92 MW |
2117 | /* |
2118 | * Issue command to spin up drive when not ready | |
2119 | */ | |
1da177e4 | 2120 | if (!spintime) { |
e73aec82 | 2121 | sd_printk(KERN_NOTICE, sdkp, "Spinning up disk..."); |
1da177e4 LT |
2122 | cmd[0] = START_STOP; |
2123 | cmd[1] = 1; /* Return immediately */ | |
2124 | memset((void *) &cmd[2], 0, 8); | |
2125 | cmd[4] = 1; /* Start spin cycle */ | |
d2886ea3 SR |
2126 | if (sdkp->device->start_stop_pwr_cond) |
2127 | cmd[4] |= 1 << 4; | |
ea73a9f2 JB |
2128 | scsi_execute_req(sdkp->device, cmd, DMA_NONE, |
2129 | NULL, 0, &sshdr, | |
f4f4e47e FT |
2130 | SD_TIMEOUT, SD_MAX_RETRIES, |
2131 | NULL); | |
4451e472 AS |
2132 | spintime_expire = jiffies + 100 * HZ; |
2133 | spintime = 1; | |
1da177e4 | 2134 | } |
1da177e4 LT |
2135 | /* Wait 1 second for next try */ |
2136 | msleep(1000); | |
3a1d0783 | 2137 | printk(KERN_CONT "."); |
4451e472 AS |
2138 | |
2139 | /* | |
2140 | * Wait for USB flash devices with slow firmware. | |
2141 | * Yes, this sense key/ASC combination shouldn't | |
2142 | * occur here. It's characteristic of these devices. | |
2143 | */ | |
2144 | } else if (sense_valid && | |
2145 | sshdr.sense_key == UNIT_ATTENTION && | |
2146 | sshdr.asc == 0x28) { | |
2147 | if (!spintime) { | |
2148 | spintime_expire = jiffies + 5 * HZ; | |
2149 | spintime = 1; | |
2150 | } | |
2151 | /* Wait 1 second for next try */ | |
2152 | msleep(1000); | |
1da177e4 LT |
2153 | } else { |
2154 | /* we don't understand the sense code, so it's | |
2155 | * probably pointless to loop */ | |
2156 | if(!spintime) { | |
e73aec82 MP |
2157 | sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n"); |
2158 | sd_print_sense_hdr(sdkp, &sshdr); | |
1da177e4 LT |
2159 | } |
2160 | break; | |
2161 | } | |
2162 | ||
4451e472 | 2163 | } while (spintime && time_before_eq(jiffies, spintime_expire)); |
1da177e4 LT |
2164 | |
2165 | if (spintime) { | |
2166 | if (scsi_status_is_good(the_result)) | |
3a1d0783 | 2167 | printk(KERN_CONT "ready\n"); |
1da177e4 | 2168 | else |
3a1d0783 | 2169 | printk(KERN_CONT "not responding...\n"); |
1da177e4 LT |
2170 | } |
2171 | } | |
2172 | ||
e0597d70 MP |
2173 | /* |
2174 | * Determine whether disk supports Data Integrity Field. | |
2175 | */ | |
fe542396 | 2176 | static int sd_read_protection_type(struct scsi_disk *sdkp, unsigned char *buffer) |
e0597d70 MP |
2177 | { |
2178 | struct scsi_device *sdp = sdkp->device; | |
2179 | u8 type; | |
fe542396 | 2180 | int ret = 0; |
e0597d70 MP |
2181 | |
2182 | if (scsi_device_protection(sdp) == 0 || (buffer[12] & 1) == 0) | |
fe542396 | 2183 | return ret; |
35e1a5d9 MP |
2184 | |
2185 | type = ((buffer[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */ | |
2186 | ||
8475c811 | 2187 | if (type > T10_PI_TYPE3_PROTECTION) |
fe542396 MP |
2188 | ret = -ENODEV; |
2189 | else if (scsi_host_dif_capable(sdp->host, type)) | |
2190 | ret = 1; | |
2191 | ||
2192 | if (sdkp->first_scan || type != sdkp->protection_type) | |
2193 | switch (ret) { | |
2194 | case -ENODEV: | |
2195 | sd_printk(KERN_ERR, sdkp, "formatted with unsupported" \ | |
2196 | " protection type %u. Disabling disk!\n", | |
2197 | type); | |
2198 | break; | |
2199 | case 1: | |
2200 | sd_printk(KERN_NOTICE, sdkp, | |
2201 | "Enabling DIF Type %u protection\n", type); | |
2202 | break; | |
2203 | case 0: | |
2204 | sd_printk(KERN_NOTICE, sdkp, | |
2205 | "Disabling DIF Type %u protection\n", type); | |
2206 | break; | |
2207 | } | |
e0597d70 | 2208 | |
be922f47 MP |
2209 | sdkp->protection_type = type; |
2210 | ||
fe542396 | 2211 | return ret; |
e0597d70 MP |
2212 | } |
2213 | ||
0da205e0 MW |
2214 | static void read_capacity_error(struct scsi_disk *sdkp, struct scsi_device *sdp, |
2215 | struct scsi_sense_hdr *sshdr, int sense_valid, | |
2216 | int the_result) | |
2217 | { | |
c65be1a6 | 2218 | if (driver_byte(the_result) == DRIVER_SENSE) |
0da205e0 MW |
2219 | sd_print_sense_hdr(sdkp, sshdr); |
2220 | else | |
2221 | sd_printk(KERN_NOTICE, sdkp, "Sense not available.\n"); | |
2222 | ||
2223 | /* | |
2224 | * Set dirty bit for removable devices if not ready - | |
2225 | * sometimes drives will not report this properly. | |
2226 | */ | |
2227 | if (sdp->removable && | |
2228 | sense_valid && sshdr->sense_key == NOT_READY) | |
2bae0093 | 2229 | set_media_not_present(sdkp); |
0da205e0 MW |
2230 | |
2231 | /* | |
2232 | * We used to set media_present to 0 here to indicate no media | |
2233 | * in the drive, but some drives fail read capacity even with | |
2234 | * media present, so we can't do that. | |
2235 | */ | |
2236 | sdkp->capacity = 0; /* unknown mapped to zero - as usual */ | |
2237 | } | |
2238 | ||
2239 | #define RC16_LEN 32 | |
2240 | #if RC16_LEN > SD_BUF_SIZE | |
2241 | #error RC16_LEN must not be more than SD_BUF_SIZE | |
2242 | #endif | |
2243 | ||
3233ac19 JB |
2244 | #define READ_CAPACITY_RETRIES_ON_RESET 10 |
2245 | ||
7c856152 MP |
2246 | /* |
2247 | * Ensure that we don't overflow sector_t when CONFIG_LBDAF is not set | |
2248 | * and the reported logical block size is bigger than 512 bytes. Note | |
2249 | * that last_sector is a u64 and therefore logical_to_sectors() is not | |
2250 | * applicable. | |
2251 | */ | |
2252 | static bool sd_addressable_capacity(u64 lba, unsigned int sector_size) | |
2253 | { | |
2254 | u64 last_sector = (lba + 1ULL) << (ilog2(sector_size) - 9); | |
2255 | ||
2256 | if (sizeof(sector_t) == 4 && last_sector > U32_MAX) | |
2257 | return false; | |
2258 | ||
2259 | return true; | |
2260 | } | |
2261 | ||
0da205e0 MW |
2262 | static int read_capacity_16(struct scsi_disk *sdkp, struct scsi_device *sdp, |
2263 | unsigned char *buffer) | |
ea73a9f2 | 2264 | { |
1da177e4 | 2265 | unsigned char cmd[16]; |
1da177e4 LT |
2266 | struct scsi_sense_hdr sshdr; |
2267 | int sense_valid = 0; | |
0da205e0 | 2268 | int the_result; |
3233ac19 | 2269 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
ea09bcc9 | 2270 | unsigned int alignment; |
0da205e0 MW |
2271 | unsigned long long lba; |
2272 | unsigned sector_size; | |
1da177e4 | 2273 | |
5ce524bd HG |
2274 | if (sdp->no_read_capacity_16) |
2275 | return -EINVAL; | |
2276 | ||
1da177e4 | 2277 | do { |
0da205e0 | 2278 | memset(cmd, 0, 16); |
eb846d9f | 2279 | cmd[0] = SERVICE_ACTION_IN_16; |
0da205e0 MW |
2280 | cmd[1] = SAI_READ_CAPACITY_16; |
2281 | cmd[13] = RC16_LEN; | |
2282 | memset(buffer, 0, RC16_LEN); | |
2283 | ||
ea73a9f2 | 2284 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, |
0da205e0 MW |
2285 | buffer, RC16_LEN, &sshdr, |
2286 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
1da177e4 | 2287 | |
ea73a9f2 | 2288 | if (media_not_present(sdkp, &sshdr)) |
0da205e0 | 2289 | return -ENODEV; |
1da177e4 | 2290 | |
2b301307 | 2291 | if (the_result) { |
ea73a9f2 | 2292 | sense_valid = scsi_sense_valid(&sshdr); |
2b301307 MW |
2293 | if (sense_valid && |
2294 | sshdr.sense_key == ILLEGAL_REQUEST && | |
2295 | (sshdr.asc == 0x20 || sshdr.asc == 0x24) && | |
2296 | sshdr.ascq == 0x00) | |
2297 | /* Invalid Command Operation Code or | |
2298 | * Invalid Field in CDB, just retry | |
2299 | * silently with RC10 */ | |
2300 | return -EINVAL; | |
3233ac19 JB |
2301 | if (sense_valid && |
2302 | sshdr.sense_key == UNIT_ATTENTION && | |
2303 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) | |
2304 | /* Device reset might occur several times, | |
2305 | * give it one more chance */ | |
2306 | if (--reset_retries > 0) | |
2307 | continue; | |
2b301307 | 2308 | } |
1da177e4 LT |
2309 | retries--; |
2310 | ||
2311 | } while (the_result && retries); | |
2312 | ||
0da205e0 | 2313 | if (the_result) { |
ef61329d | 2314 | sd_print_result(sdkp, "Read Capacity(16) failed", the_result); |
0da205e0 MW |
2315 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); |
2316 | return -EINVAL; | |
2317 | } | |
e73aec82 | 2318 | |
8f76d151 DH |
2319 | sector_size = get_unaligned_be32(&buffer[8]); |
2320 | lba = get_unaligned_be64(&buffer[0]); | |
0da205e0 | 2321 | |
fe542396 MP |
2322 | if (sd_read_protection_type(sdkp, buffer) < 0) { |
2323 | sdkp->capacity = 0; | |
2324 | return -ENODEV; | |
2325 | } | |
0da205e0 | 2326 | |
7c856152 | 2327 | if (!sd_addressable_capacity(lba, sector_size)) { |
0da205e0 MW |
2328 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a " |
2329 | "kernel compiled with support for large block " | |
2330 | "devices.\n"); | |
2331 | sdkp->capacity = 0; | |
2332 | return -EOVERFLOW; | |
2333 | } | |
2334 | ||
ea09bcc9 | 2335 | /* Logical blocks per physical block exponent */ |
526f7c79 | 2336 | sdkp->physical_block_size = (1 << (buffer[13] & 0xf)) * sector_size; |
ea09bcc9 | 2337 | |
89d94756 HR |
2338 | /* RC basis */ |
2339 | sdkp->rc_basis = (buffer[12] >> 4) & 0x3; | |
2340 | ||
ea09bcc9 MP |
2341 | /* Lowest aligned logical block */ |
2342 | alignment = ((buffer[14] & 0x3f) << 8 | buffer[15]) * sector_size; | |
2343 | blk_queue_alignment_offset(sdp->request_queue, alignment); | |
2344 | if (alignment && sdkp->first_scan) | |
2345 | sd_printk(KERN_NOTICE, sdkp, | |
2346 | "physical block alignment offset: %u\n", alignment); | |
2347 | ||
c98a0eb0 MP |
2348 | if (buffer[14] & 0x80) { /* LBPME */ |
2349 | sdkp->lbpme = 1; | |
e339c1a7 | 2350 | |
c98a0eb0 MP |
2351 | if (buffer[14] & 0x40) /* LBPRZ */ |
2352 | sdkp->lbprz = 1; | |
e339c1a7 | 2353 | |
c98a0eb0 | 2354 | sd_config_discard(sdkp, SD_LBP_WS16); |
e339c1a7 MP |
2355 | } |
2356 | ||
0da205e0 MW |
2357 | sdkp->capacity = lba + 1; |
2358 | return sector_size; | |
2359 | } | |
2360 | ||
2361 | static int read_capacity_10(struct scsi_disk *sdkp, struct scsi_device *sdp, | |
2362 | unsigned char *buffer) | |
2363 | { | |
2364 | unsigned char cmd[16]; | |
2365 | struct scsi_sense_hdr sshdr; | |
2366 | int sense_valid = 0; | |
2367 | int the_result; | |
3233ac19 | 2368 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
0da205e0 MW |
2369 | sector_t lba; |
2370 | unsigned sector_size; | |
2371 | ||
2372 | do { | |
2373 | cmd[0] = READ_CAPACITY; | |
2374 | memset(&cmd[1], 0, 9); | |
2375 | memset(buffer, 0, 8); | |
2376 | ||
2377 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, | |
2378 | buffer, 8, &sshdr, | |
2379 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
2380 | ||
2381 | if (media_not_present(sdkp, &sshdr)) | |
2382 | return -ENODEV; | |
2383 | ||
3233ac19 | 2384 | if (the_result) { |
0da205e0 | 2385 | sense_valid = scsi_sense_valid(&sshdr); |
3233ac19 JB |
2386 | if (sense_valid && |
2387 | sshdr.sense_key == UNIT_ATTENTION && | |
2388 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) | |
2389 | /* Device reset might occur several times, | |
2390 | * give it one more chance */ | |
2391 | if (--reset_retries > 0) | |
2392 | continue; | |
2393 | } | |
0da205e0 MW |
2394 | retries--; |
2395 | ||
2396 | } while (the_result && retries); | |
2397 | ||
2398 | if (the_result) { | |
ef61329d | 2399 | sd_print_result(sdkp, "Read Capacity(10) failed", the_result); |
0da205e0 MW |
2400 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); |
2401 | return -EINVAL; | |
2402 | } | |
2403 | ||
8f76d151 DH |
2404 | sector_size = get_unaligned_be32(&buffer[4]); |
2405 | lba = get_unaligned_be32(&buffer[0]); | |
0da205e0 | 2406 | |
5ce524bd HG |
2407 | if (sdp->no_read_capacity_16 && (lba == 0xffffffff)) { |
2408 | /* Some buggy (usb cardreader) devices return an lba of | |
2409 | 0xffffffff when the want to report a size of 0 (with | |
2410 | which they really mean no media is present) */ | |
2411 | sdkp->capacity = 0; | |
5cc10350 | 2412 | sdkp->physical_block_size = sector_size; |
5ce524bd HG |
2413 | return sector_size; |
2414 | } | |
2415 | ||
7c856152 | 2416 | if (!sd_addressable_capacity(lba, sector_size)) { |
0da205e0 MW |
2417 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a " |
2418 | "kernel compiled with support for large block " | |
2419 | "devices.\n"); | |
2420 | sdkp->capacity = 0; | |
2421 | return -EOVERFLOW; | |
2422 | } | |
2423 | ||
2424 | sdkp->capacity = lba + 1; | |
526f7c79 | 2425 | sdkp->physical_block_size = sector_size; |
0da205e0 MW |
2426 | return sector_size; |
2427 | } | |
2428 | ||
2b301307 MW |
2429 | static int sd_try_rc16_first(struct scsi_device *sdp) |
2430 | { | |
f87146bb HR |
2431 | if (sdp->host->max_cmd_len < 16) |
2432 | return 0; | |
6a0bdffa AS |
2433 | if (sdp->try_rc_10_first) |
2434 | return 0; | |
2b301307 MW |
2435 | if (sdp->scsi_level > SCSI_SPC_2) |
2436 | return 1; | |
2437 | if (scsi_device_protection(sdp)) | |
2438 | return 1; | |
2439 | return 0; | |
2440 | } | |
2441 | ||
0da205e0 MW |
2442 | /* |
2443 | * read disk capacity | |
2444 | */ | |
2445 | static void | |
2446 | sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer) | |
2447 | { | |
2448 | int sector_size; | |
2449 | struct scsi_device *sdp = sdkp->device; | |
2450 | ||
2b301307 | 2451 | if (sd_try_rc16_first(sdp)) { |
0da205e0 MW |
2452 | sector_size = read_capacity_16(sdkp, sdp, buffer); |
2453 | if (sector_size == -EOVERFLOW) | |
1da177e4 | 2454 | goto got_data; |
2b301307 MW |
2455 | if (sector_size == -ENODEV) |
2456 | return; | |
2457 | if (sector_size < 0) | |
2458 | sector_size = read_capacity_10(sdkp, sdp, buffer); | |
0da205e0 MW |
2459 | if (sector_size < 0) |
2460 | return; | |
1da177e4 | 2461 | } else { |
0da205e0 MW |
2462 | sector_size = read_capacity_10(sdkp, sdp, buffer); |
2463 | if (sector_size == -EOVERFLOW) | |
2464 | goto got_data; | |
2465 | if (sector_size < 0) | |
2466 | return; | |
2467 | if ((sizeof(sdkp->capacity) > 4) && | |
2468 | (sdkp->capacity > 0xffffffffULL)) { | |
2469 | int old_sector_size = sector_size; | |
2470 | sd_printk(KERN_NOTICE, sdkp, "Very big device. " | |
2471 | "Trying to use READ CAPACITY(16).\n"); | |
2472 | sector_size = read_capacity_16(sdkp, sdp, buffer); | |
2473 | if (sector_size < 0) { | |
2474 | sd_printk(KERN_NOTICE, sdkp, | |
2475 | "Using 0xffffffff as device size\n"); | |
2476 | sdkp->capacity = 1 + (sector_t) 0xffffffff; | |
2477 | sector_size = old_sector_size; | |
2478 | goto got_data; | |
2479 | } | |
597d7400 MP |
2480 | /* Remember that READ CAPACITY(16) succeeded */ |
2481 | sdp->try_rc_10_first = 0; | |
0da205e0 MW |
2482 | } |
2483 | } | |
1da177e4 | 2484 | |
5c211caa AS |
2485 | /* Some devices are known to return the total number of blocks, |
2486 | * not the highest block number. Some devices have versions | |
2487 | * which do this and others which do not. Some devices we might | |
2488 | * suspect of doing this but we don't know for certain. | |
2489 | * | |
2490 | * If we know the reported capacity is wrong, decrement it. If | |
2491 | * we can only guess, then assume the number of blocks is even | |
2492 | * (usually true but not always) and err on the side of lowering | |
2493 | * the capacity. | |
2494 | */ | |
2495 | if (sdp->fix_capacity || | |
2496 | (sdp->guess_capacity && (sdkp->capacity & 0x01))) { | |
2497 | sd_printk(KERN_INFO, sdkp, "Adjusting the sector count " | |
2498 | "from its reported value: %llu\n", | |
2499 | (unsigned long long) sdkp->capacity); | |
1da177e4 | 2500 | --sdkp->capacity; |
61bf54b7 ON |
2501 | } |
2502 | ||
1da177e4 LT |
2503 | got_data: |
2504 | if (sector_size == 0) { | |
2505 | sector_size = 512; | |
e73aec82 MP |
2506 | sd_printk(KERN_NOTICE, sdkp, "Sector size 0 reported, " |
2507 | "assuming 512.\n"); | |
1da177e4 LT |
2508 | } |
2509 | ||
2510 | if (sector_size != 512 && | |
2511 | sector_size != 1024 && | |
2512 | sector_size != 2048 && | |
74856fbf | 2513 | sector_size != 4096) { |
e73aec82 MP |
2514 | sd_printk(KERN_NOTICE, sdkp, "Unsupported sector size %d.\n", |
2515 | sector_size); | |
1da177e4 LT |
2516 | /* |
2517 | * The user might want to re-format the drive with | |
2518 | * a supported sectorsize. Once this happens, it | |
2519 | * would be relatively trivial to set the thing up. | |
2520 | * For this reason, we leave the thing in the table. | |
2521 | */ | |
2522 | sdkp->capacity = 0; | |
2523 | /* | |
2524 | * set a bogus sector size so the normal read/write | |
2525 | * logic in the block layer will eventually refuse any | |
2526 | * request on this device without tripping over power | |
2527 | * of two sector size assumptions | |
2528 | */ | |
2529 | sector_size = 512; | |
2530 | } | |
e1defc4f | 2531 | blk_queue_logical_block_size(sdp->request_queue, sector_size); |
89d94756 HR |
2532 | blk_queue_physical_block_size(sdp->request_queue, |
2533 | sdkp->physical_block_size); | |
2534 | sdkp->device->sector_size = sector_size; | |
7404ad3b | 2535 | |
89d94756 HR |
2536 | if (sdkp->capacity > 0xffffffff) |
2537 | sdp->use_16_for_rw = 1; | |
1da177e4 | 2538 | |
89d94756 | 2539 | } |
1da177e4 | 2540 | |
89d94756 HR |
2541 | /* |
2542 | * Print disk capacity | |
2543 | */ | |
2544 | static void | |
2545 | sd_print_capacity(struct scsi_disk *sdkp, | |
2546 | sector_t old_capacity) | |
2547 | { | |
2548 | int sector_size = sdkp->device->sector_size; | |
2549 | char cap_str_2[10], cap_str_10[10]; | |
ea09bcc9 | 2550 | |
89d94756 HR |
2551 | string_get_size(sdkp->capacity, sector_size, |
2552 | STRING_UNITS_2, cap_str_2, sizeof(cap_str_2)); | |
2553 | string_get_size(sdkp->capacity, sector_size, | |
2554 | STRING_UNITS_10, cap_str_10, | |
2555 | sizeof(cap_str_10)); | |
1da177e4 | 2556 | |
89d94756 HR |
2557 | if (sdkp->first_scan || old_capacity != sdkp->capacity) { |
2558 | sd_printk(KERN_NOTICE, sdkp, | |
2559 | "%llu %d-byte logical blocks: (%s/%s)\n", | |
2560 | (unsigned long long)sdkp->capacity, | |
2561 | sector_size, cap_str_10, cap_str_2); | |
53ad570b | 2562 | |
89d94756 HR |
2563 | if (sdkp->physical_block_size != sector_size) |
2564 | sd_printk(KERN_NOTICE, sdkp, | |
2565 | "%u-byte physical blocks\n", | |
2566 | sdkp->physical_block_size); | |
2567 | ||
2568 | sd_zbc_print_zones(sdkp); | |
2569 | } | |
1da177e4 LT |
2570 | } |
2571 | ||
2572 | /* called with buffer of length 512 */ | |
2573 | static inline int | |
ea73a9f2 JB |
2574 | sd_do_mode_sense(struct scsi_device *sdp, int dbd, int modepage, |
2575 | unsigned char *buffer, int len, struct scsi_mode_data *data, | |
2576 | struct scsi_sense_hdr *sshdr) | |
1da177e4 | 2577 | { |
ea73a9f2 | 2578 | return scsi_mode_sense(sdp, dbd, modepage, buffer, len, |
1cf72699 | 2579 | SD_TIMEOUT, SD_MAX_RETRIES, data, |
ea73a9f2 | 2580 | sshdr); |
1da177e4 LT |
2581 | } |
2582 | ||
2583 | /* | |
2584 | * read write protect setting, if possible - called only in sd_revalidate_disk() | |
48970800 | 2585 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
2586 | */ |
2587 | static void | |
e73aec82 | 2588 | sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer) |
ea73a9f2 | 2589 | { |
1da177e4 | 2590 | int res; |
ea73a9f2 | 2591 | struct scsi_device *sdp = sdkp->device; |
1da177e4 | 2592 | struct scsi_mode_data data; |
20bd1d02 | 2593 | int disk_ro = get_disk_ro(sdkp->disk); |
70a9b873 | 2594 | int old_wp = sdkp->write_prot; |
1da177e4 LT |
2595 | |
2596 | set_disk_ro(sdkp->disk, 0); | |
ea73a9f2 | 2597 | if (sdp->skip_ms_page_3f) { |
b2bff6ce | 2598 | sd_first_printk(KERN_NOTICE, sdkp, "Assuming Write Enabled\n"); |
1da177e4 LT |
2599 | return; |
2600 | } | |
2601 | ||
ea73a9f2 JB |
2602 | if (sdp->use_192_bytes_for_3f) { |
2603 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 192, &data, NULL); | |
1da177e4 LT |
2604 | } else { |
2605 | /* | |
2606 | * First attempt: ask for all pages (0x3F), but only 4 bytes. | |
2607 | * We have to start carefully: some devices hang if we ask | |
2608 | * for more than is available. | |
2609 | */ | |
ea73a9f2 | 2610 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 4, &data, NULL); |
1da177e4 LT |
2611 | |
2612 | /* | |
2613 | * Second attempt: ask for page 0 When only page 0 is | |
2614 | * implemented, a request for page 3F may return Sense Key | |
2615 | * 5: Illegal Request, Sense Code 24: Invalid field in | |
2616 | * CDB. | |
2617 | */ | |
2618 | if (!scsi_status_is_good(res)) | |
ea73a9f2 | 2619 | res = sd_do_mode_sense(sdp, 0, 0, buffer, 4, &data, NULL); |
1da177e4 LT |
2620 | |
2621 | /* | |
2622 | * Third attempt: ask 255 bytes, as we did earlier. | |
2623 | */ | |
2624 | if (!scsi_status_is_good(res)) | |
ea73a9f2 JB |
2625 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 255, |
2626 | &data, NULL); | |
1da177e4 LT |
2627 | } |
2628 | ||
2629 | if (!scsi_status_is_good(res)) { | |
b2bff6ce | 2630 | sd_first_printk(KERN_WARNING, sdkp, |
e73aec82 | 2631 | "Test WP failed, assume Write Enabled\n"); |
1da177e4 LT |
2632 | } else { |
2633 | sdkp->write_prot = ((data.device_specific & 0x80) != 0); | |
20bd1d02 | 2634 | set_disk_ro(sdkp->disk, sdkp->write_prot || disk_ro); |
70a9b873 MP |
2635 | if (sdkp->first_scan || old_wp != sdkp->write_prot) { |
2636 | sd_printk(KERN_NOTICE, sdkp, "Write Protect is %s\n", | |
2637 | sdkp->write_prot ? "on" : "off"); | |
df441cc0 | 2638 | sd_printk(KERN_DEBUG, sdkp, "Mode Sense: %4ph\n", buffer); |
70a9b873 | 2639 | } |
1da177e4 LT |
2640 | } |
2641 | } | |
2642 | ||
2643 | /* | |
2644 | * sd_read_cache_type - called only from sd_revalidate_disk() | |
48970800 | 2645 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
2646 | */ |
2647 | static void | |
e73aec82 | 2648 | sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer) |
631e8a13 | 2649 | { |
1da177e4 | 2650 | int len = 0, res; |
ea73a9f2 | 2651 | struct scsi_device *sdp = sdkp->device; |
1da177e4 | 2652 | |
631e8a13 AV |
2653 | int dbd; |
2654 | int modepage; | |
0bcaa111 | 2655 | int first_len; |
1da177e4 LT |
2656 | struct scsi_mode_data data; |
2657 | struct scsi_sense_hdr sshdr; | |
70a9b873 MP |
2658 | int old_wce = sdkp->WCE; |
2659 | int old_rcd = sdkp->RCD; | |
2660 | int old_dpofua = sdkp->DPOFUA; | |
1da177e4 | 2661 | |
39c60a09 JB |
2662 | |
2663 | if (sdkp->cache_override) | |
2664 | return; | |
2665 | ||
0bcaa111 LT |
2666 | first_len = 4; |
2667 | if (sdp->skip_ms_page_8) { | |
2668 | if (sdp->type == TYPE_RBC) | |
2669 | goto defaults; | |
2670 | else { | |
2671 | if (sdp->skip_ms_page_3f) | |
2672 | goto defaults; | |
2673 | modepage = 0x3F; | |
2674 | if (sdp->use_192_bytes_for_3f) | |
2675 | first_len = 192; | |
2676 | dbd = 0; | |
2677 | } | |
2678 | } else if (sdp->type == TYPE_RBC) { | |
631e8a13 AV |
2679 | modepage = 6; |
2680 | dbd = 8; | |
2681 | } else { | |
2682 | modepage = 8; | |
2683 | dbd = 0; | |
2684 | } | |
2685 | ||
1da177e4 | 2686 | /* cautiously ask */ |
0bcaa111 LT |
2687 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, first_len, |
2688 | &data, &sshdr); | |
1da177e4 LT |
2689 | |
2690 | if (!scsi_status_is_good(res)) | |
2691 | goto bad_sense; | |
2692 | ||
6d73c851 AV |
2693 | if (!data.header_length) { |
2694 | modepage = 6; | |
0bcaa111 | 2695 | first_len = 0; |
b2bff6ce MP |
2696 | sd_first_printk(KERN_ERR, sdkp, |
2697 | "Missing header in MODE_SENSE response\n"); | |
6d73c851 AV |
2698 | } |
2699 | ||
1da177e4 LT |
2700 | /* that went OK, now ask for the proper length */ |
2701 | len = data.length; | |
2702 | ||
2703 | /* | |
2704 | * We're only interested in the first three bytes, actually. | |
2705 | * But the data cache page is defined for the first 20. | |
2706 | */ | |
2707 | if (len < 3) | |
2708 | goto bad_sense; | |
0bcaa111 | 2709 | else if (len > SD_BUF_SIZE) { |
b2bff6ce | 2710 | sd_first_printk(KERN_NOTICE, sdkp, "Truncating mode parameter " |
0bcaa111 LT |
2711 | "data from %d to %d bytes\n", len, SD_BUF_SIZE); |
2712 | len = SD_BUF_SIZE; | |
2713 | } | |
2714 | if (modepage == 0x3F && sdp->use_192_bytes_for_3f) | |
2715 | len = 192; | |
1da177e4 LT |
2716 | |
2717 | /* Get the data */ | |
0bcaa111 LT |
2718 | if (len > first_len) |
2719 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, len, | |
2720 | &data, &sshdr); | |
1da177e4 LT |
2721 | |
2722 | if (scsi_status_is_good(res)) { | |
631e8a13 | 2723 | int offset = data.header_length + data.block_descriptor_length; |
1da177e4 | 2724 | |
0bcaa111 LT |
2725 | while (offset < len) { |
2726 | u8 page_code = buffer[offset] & 0x3F; | |
2727 | u8 spf = buffer[offset] & 0x40; | |
2728 | ||
2729 | if (page_code == 8 || page_code == 6) { | |
2730 | /* We're interested only in the first 3 bytes. | |
2731 | */ | |
2732 | if (len - offset <= 2) { | |
b2bff6ce MP |
2733 | sd_first_printk(KERN_ERR, sdkp, |
2734 | "Incomplete mode parameter " | |
2735 | "data\n"); | |
0bcaa111 LT |
2736 | goto defaults; |
2737 | } else { | |
2738 | modepage = page_code; | |
2739 | goto Page_found; | |
2740 | } | |
2741 | } else { | |
2742 | /* Go to the next page */ | |
2743 | if (spf && len - offset > 3) | |
2744 | offset += 4 + (buffer[offset+2] << 8) + | |
2745 | buffer[offset+3]; | |
2746 | else if (!spf && len - offset > 1) | |
2747 | offset += 2 + buffer[offset+1]; | |
2748 | else { | |
b2bff6ce MP |
2749 | sd_first_printk(KERN_ERR, sdkp, |
2750 | "Incomplete mode " | |
2751 | "parameter data\n"); | |
0bcaa111 LT |
2752 | goto defaults; |
2753 | } | |
2754 | } | |
48970800 AV |
2755 | } |
2756 | ||
b2bff6ce | 2757 | sd_first_printk(KERN_ERR, sdkp, "No Caching mode page found\n"); |
984f1733 AS |
2758 | goto defaults; |
2759 | ||
0bcaa111 | 2760 | Page_found: |
631e8a13 AV |
2761 | if (modepage == 8) { |
2762 | sdkp->WCE = ((buffer[offset + 2] & 0x04) != 0); | |
2763 | sdkp->RCD = ((buffer[offset + 2] & 0x01) != 0); | |
2764 | } else { | |
2765 | sdkp->WCE = ((buffer[offset + 2] & 0x01) == 0); | |
2766 | sdkp->RCD = 0; | |
2767 | } | |
1da177e4 | 2768 | |
007365ad | 2769 | sdkp->DPOFUA = (data.device_specific & 0x10) != 0; |
b14bf2d0 AS |
2770 | if (sdp->broken_fua) { |
2771 | sd_first_printk(KERN_NOTICE, sdkp, "Disabling FUA\n"); | |
2772 | sdkp->DPOFUA = 0; | |
26f28197 DLM |
2773 | } else if (sdkp->DPOFUA && !sdkp->device->use_10_for_rw && |
2774 | !sdkp->device->use_16_for_rw) { | |
b2bff6ce | 2775 | sd_first_printk(KERN_NOTICE, sdkp, |
e73aec82 | 2776 | "Uses READ/WRITE(6), disabling FUA\n"); |
007365ad TH |
2777 | sdkp->DPOFUA = 0; |
2778 | } | |
2779 | ||
2eefd57b SRT |
2780 | /* No cache flush allowed for write protected devices */ |
2781 | if (sdkp->WCE && sdkp->write_prot) | |
2782 | sdkp->WCE = 0; | |
2783 | ||
70a9b873 MP |
2784 | if (sdkp->first_scan || old_wce != sdkp->WCE || |
2785 | old_rcd != sdkp->RCD || old_dpofua != sdkp->DPOFUA) | |
2786 | sd_printk(KERN_NOTICE, sdkp, | |
2787 | "Write cache: %s, read cache: %s, %s\n", | |
2788 | sdkp->WCE ? "enabled" : "disabled", | |
2789 | sdkp->RCD ? "disabled" : "enabled", | |
2790 | sdkp->DPOFUA ? "supports DPO and FUA" | |
2791 | : "doesn't support DPO or FUA"); | |
1da177e4 LT |
2792 | |
2793 | return; | |
2794 | } | |
2795 | ||
2796 | bad_sense: | |
ea73a9f2 | 2797 | if (scsi_sense_valid(&sshdr) && |
1da177e4 LT |
2798 | sshdr.sense_key == ILLEGAL_REQUEST && |
2799 | sshdr.asc == 0x24 && sshdr.ascq == 0x0) | |
e73aec82 | 2800 | /* Invalid field in CDB */ |
b2bff6ce | 2801 | sd_first_printk(KERN_NOTICE, sdkp, "Cache data unavailable\n"); |
1da177e4 | 2802 | else |
b2bff6ce MP |
2803 | sd_first_printk(KERN_ERR, sdkp, |
2804 | "Asking for cache data failed\n"); | |
1da177e4 LT |
2805 | |
2806 | defaults: | |
b81478d8 | 2807 | if (sdp->wce_default_on) { |
b2bff6ce MP |
2808 | sd_first_printk(KERN_NOTICE, sdkp, |
2809 | "Assuming drive cache: write back\n"); | |
b81478d8 NJ |
2810 | sdkp->WCE = 1; |
2811 | } else { | |
b2bff6ce MP |
2812 | sd_first_printk(KERN_ERR, sdkp, |
2813 | "Assuming drive cache: write through\n"); | |
b81478d8 NJ |
2814 | sdkp->WCE = 0; |
2815 | } | |
1da177e4 | 2816 | sdkp->RCD = 0; |
48970800 | 2817 | sdkp->DPOFUA = 0; |
1da177e4 LT |
2818 | } |
2819 | ||
e0597d70 MP |
2820 | /* |
2821 | * The ATO bit indicates whether the DIF application tag is available | |
2822 | * for use by the operating system. | |
2823 | */ | |
439d77f7 | 2824 | static void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer) |
e0597d70 MP |
2825 | { |
2826 | int res, offset; | |
2827 | struct scsi_device *sdp = sdkp->device; | |
2828 | struct scsi_mode_data data; | |
2829 | struct scsi_sense_hdr sshdr; | |
2830 | ||
89d94756 | 2831 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) |
e0597d70 MP |
2832 | return; |
2833 | ||
2834 | if (sdkp->protection_type == 0) | |
2835 | return; | |
2836 | ||
2837 | res = scsi_mode_sense(sdp, 1, 0x0a, buffer, 36, SD_TIMEOUT, | |
2838 | SD_MAX_RETRIES, &data, &sshdr); | |
2839 | ||
2840 | if (!scsi_status_is_good(res) || !data.header_length || | |
2841 | data.length < 6) { | |
b2bff6ce | 2842 | sd_first_printk(KERN_WARNING, sdkp, |
e0597d70 MP |
2843 | "getting Control mode page failed, assume no ATO\n"); |
2844 | ||
2845 | if (scsi_sense_valid(&sshdr)) | |
2846 | sd_print_sense_hdr(sdkp, &sshdr); | |
2847 | ||
2848 | return; | |
2849 | } | |
2850 | ||
2851 | offset = data.header_length + data.block_descriptor_length; | |
2852 | ||
2853 | if ((buffer[offset] & 0x3f) != 0x0a) { | |
b2bff6ce | 2854 | sd_first_printk(KERN_ERR, sdkp, "ATO Got wrong page\n"); |
e0597d70 MP |
2855 | return; |
2856 | } | |
2857 | ||
2858 | if ((buffer[offset + 5] & 0x80) == 0) | |
2859 | return; | |
2860 | ||
2861 | sdkp->ATO = 1; | |
2862 | ||
2863 | return; | |
2864 | } | |
2865 | ||
d11b6916 MP |
2866 | /** |
2867 | * sd_read_block_limits - Query disk device for preferred I/O sizes. | |
7529fbb0 | 2868 | * @sdkp: disk to query |
d11b6916 MP |
2869 | */ |
2870 | static void sd_read_block_limits(struct scsi_disk *sdkp) | |
2871 | { | |
2872 | unsigned int sector_sz = sdkp->device->sector_size; | |
bb2d3de1 | 2873 | const int vpd_len = 64; |
e3deec09 | 2874 | unsigned char *buffer = kmalloc(vpd_len, GFP_KERNEL); |
d11b6916 | 2875 | |
e3deec09 JB |
2876 | if (!buffer || |
2877 | /* Block Limits VPD */ | |
2878 | scsi_get_vpd_page(sdkp->device, 0xb0, buffer, vpd_len)) | |
2879 | goto out; | |
d11b6916 MP |
2880 | |
2881 | blk_queue_io_min(sdkp->disk->queue, | |
2882 | get_unaligned_be16(&buffer[6]) * sector_sz); | |
ca369d51 MP |
2883 | |
2884 | sdkp->max_xfer_blocks = get_unaligned_be32(&buffer[8]); | |
2885 | sdkp->opt_xfer_blocks = get_unaligned_be32(&buffer[12]); | |
d11b6916 | 2886 | |
c98a0eb0 MP |
2887 | if (buffer[3] == 0x3c) { |
2888 | unsigned int lba_count, desc_count; | |
e339c1a7 | 2889 | |
5db44863 | 2890 | sdkp->max_ws_blocks = (u32)get_unaligned_be64(&buffer[36]); |
e339c1a7 | 2891 | |
c98a0eb0 | 2892 | if (!sdkp->lbpme) |
045d3fe7 | 2893 | goto out; |
045d3fe7 | 2894 | |
c98a0eb0 MP |
2895 | lba_count = get_unaligned_be32(&buffer[20]); |
2896 | desc_count = get_unaligned_be32(&buffer[24]); | |
045d3fe7 | 2897 | |
c98a0eb0 MP |
2898 | if (lba_count && desc_count) |
2899 | sdkp->max_unmap_blocks = lba_count; | |
e339c1a7 | 2900 | |
c98a0eb0 | 2901 | sdkp->unmap_granularity = get_unaligned_be32(&buffer[28]); |
e339c1a7 MP |
2902 | |
2903 | if (buffer[32] & 0x80) | |
c98a0eb0 | 2904 | sdkp->unmap_alignment = |
e339c1a7 | 2905 | get_unaligned_be32(&buffer[32]) & ~(1 << 31); |
c98a0eb0 MP |
2906 | |
2907 | if (!sdkp->lbpvpd) { /* LBP VPD page not provided */ | |
2908 | ||
2909 | if (sdkp->max_unmap_blocks) | |
2910 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
2911 | else | |
2912 | sd_config_discard(sdkp, SD_LBP_WS16); | |
2913 | ||
2914 | } else { /* LBP VPD page tells us what to use */ | |
bcd069bb | 2915 | if (sdkp->lbpu && sdkp->max_unmap_blocks) |
e461338b MP |
2916 | sd_config_discard(sdkp, SD_LBP_UNMAP); |
2917 | else if (sdkp->lbpws) | |
c98a0eb0 MP |
2918 | sd_config_discard(sdkp, SD_LBP_WS16); |
2919 | else if (sdkp->lbpws10) | |
2920 | sd_config_discard(sdkp, SD_LBP_WS10); | |
2921 | else | |
2922 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
2923 | } | |
e339c1a7 MP |
2924 | } |
2925 | ||
e3deec09 | 2926 | out: |
d11b6916 MP |
2927 | kfree(buffer); |
2928 | } | |
2929 | ||
3821d768 MP |
2930 | /** |
2931 | * sd_read_block_characteristics - Query block dev. characteristics | |
7529fbb0 | 2932 | * @sdkp: disk to query |
3821d768 MP |
2933 | */ |
2934 | static void sd_read_block_characteristics(struct scsi_disk *sdkp) | |
2935 | { | |
89d94756 | 2936 | struct request_queue *q = sdkp->disk->queue; |
e3deec09 | 2937 | unsigned char *buffer; |
3821d768 | 2938 | u16 rot; |
bb2d3de1 | 2939 | const int vpd_len = 64; |
3821d768 | 2940 | |
e3deec09 | 2941 | buffer = kmalloc(vpd_len, GFP_KERNEL); |
3821d768 | 2942 | |
e3deec09 JB |
2943 | if (!buffer || |
2944 | /* Block Device Characteristics VPD */ | |
2945 | scsi_get_vpd_page(sdkp->device, 0xb1, buffer, vpd_len)) | |
2946 | goto out; | |
3821d768 MP |
2947 | |
2948 | rot = get_unaligned_be16(&buffer[4]); | |
2949 | ||
b277da0a | 2950 | if (rot == 1) { |
8b904b5b BVA |
2951 | blk_queue_flag_set(QUEUE_FLAG_NONROT, q); |
2952 | blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, q); | |
83e32a59 XZ |
2953 | } else { |
2954 | blk_queue_flag_clear(QUEUE_FLAG_NONROT, q); | |
2955 | blk_queue_flag_set(QUEUE_FLAG_ADD_RANDOM, q); | |
b277da0a | 2956 | } |
3821d768 | 2957 | |
68af412c DLM |
2958 | if (sdkp->device->type == TYPE_ZBC) { |
2959 | /* Host-managed */ | |
89d94756 | 2960 | q->limits.zoned = BLK_ZONED_HM; |
68af412c DLM |
2961 | } else { |
2962 | sdkp->zoned = (buffer[8] >> 4) & 3; | |
2963 | if (sdkp->zoned == 1) | |
2964 | /* Host-aware */ | |
2965 | q->limits.zoned = BLK_ZONED_HA; | |
2966 | else | |
2967 | /* | |
2968 | * Treat drive-managed devices as | |
2969 | * regular block devices. | |
2970 | */ | |
2971 | q->limits.zoned = BLK_ZONED_NONE; | |
2972 | } | |
89d94756 HR |
2973 | if (blk_queue_is_zoned(q) && sdkp->first_scan) |
2974 | sd_printk(KERN_NOTICE, sdkp, "Host-%s zoned block device\n", | |
2975 | q->limits.zoned == BLK_ZONED_HM ? "managed" : "aware"); | |
2976 | ||
e3deec09 | 2977 | out: |
3821d768 MP |
2978 | kfree(buffer); |
2979 | } | |
2980 | ||
045d3fe7 | 2981 | /** |
c98a0eb0 | 2982 | * sd_read_block_provisioning - Query provisioning VPD page |
7529fbb0 | 2983 | * @sdkp: disk to query |
045d3fe7 | 2984 | */ |
c98a0eb0 | 2985 | static void sd_read_block_provisioning(struct scsi_disk *sdkp) |
045d3fe7 MP |
2986 | { |
2987 | unsigned char *buffer; | |
2988 | const int vpd_len = 8; | |
2989 | ||
c98a0eb0 | 2990 | if (sdkp->lbpme == 0) |
045d3fe7 MP |
2991 | return; |
2992 | ||
2993 | buffer = kmalloc(vpd_len, GFP_KERNEL); | |
2994 | ||
2995 | if (!buffer || scsi_get_vpd_page(sdkp->device, 0xb2, buffer, vpd_len)) | |
2996 | goto out; | |
2997 | ||
c98a0eb0 MP |
2998 | sdkp->lbpvpd = 1; |
2999 | sdkp->lbpu = (buffer[5] >> 7) & 1; /* UNMAP */ | |
3000 | sdkp->lbpws = (buffer[5] >> 6) & 1; /* WRITE SAME(16) with UNMAP */ | |
3001 | sdkp->lbpws10 = (buffer[5] >> 5) & 1; /* WRITE SAME(10) with UNMAP */ | |
045d3fe7 MP |
3002 | |
3003 | out: | |
3004 | kfree(buffer); | |
3005 | } | |
3006 | ||
5db44863 MP |
3007 | static void sd_read_write_same(struct scsi_disk *sdkp, unsigned char *buffer) |
3008 | { | |
66c28f97 MP |
3009 | struct scsi_device *sdev = sdkp->device; |
3010 | ||
54b2b50c MP |
3011 | if (sdev->host->no_write_same) { |
3012 | sdev->no_write_same = 1; | |
3013 | ||
3014 | return; | |
3015 | } | |
3016 | ||
66c28f97 | 3017 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, INQUIRY) < 0) { |
af73623f BS |
3018 | /* too large values might cause issues with arcmsr */ |
3019 | int vpd_buf_len = 64; | |
3020 | ||
66c28f97 MP |
3021 | sdev->no_report_opcodes = 1; |
3022 | ||
3023 | /* Disable WRITE SAME if REPORT SUPPORTED OPERATION | |
3024 | * CODES is unsupported and the device has an ATA | |
3025 | * Information VPD page (SAT). | |
3026 | */ | |
af73623f | 3027 | if (!scsi_get_vpd_page(sdev, 0x89, buffer, vpd_buf_len)) |
66c28f97 MP |
3028 | sdev->no_write_same = 1; |
3029 | } | |
3030 | ||
3031 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME_16) == 1) | |
5db44863 | 3032 | sdkp->ws16 = 1; |
66c28f97 MP |
3033 | |
3034 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME) == 1) | |
3035 | sdkp->ws10 = 1; | |
5db44863 MP |
3036 | } |
3037 | ||
d80210f2 CH |
3038 | static void sd_read_security(struct scsi_disk *sdkp, unsigned char *buffer) |
3039 | { | |
3040 | struct scsi_device *sdev = sdkp->device; | |
3041 | ||
3042 | if (!sdev->security_supported) | |
3043 | return; | |
3044 | ||
3045 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, | |
3046 | SECURITY_PROTOCOL_IN) == 1 && | |
3047 | scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, | |
3048 | SECURITY_PROTOCOL_OUT) == 1) | |
3049 | sdkp->security = 1; | |
3050 | } | |
3051 | ||
1da177e4 LT |
3052 | /** |
3053 | * sd_revalidate_disk - called the first time a new disk is seen, | |
3054 | * performs disk spin up, read_capacity, etc. | |
3055 | * @disk: struct gendisk we care about | |
3056 | **/ | |
3057 | static int sd_revalidate_disk(struct gendisk *disk) | |
3058 | { | |
3059 | struct scsi_disk *sdkp = scsi_disk(disk); | |
3060 | struct scsi_device *sdp = sdkp->device; | |
ca369d51 | 3061 | struct request_queue *q = sdkp->disk->queue; |
89d94756 | 3062 | sector_t old_capacity = sdkp->capacity; |
1da177e4 | 3063 | unsigned char *buffer; |
ca369d51 | 3064 | unsigned int dev_max, rw_max; |
1da177e4 | 3065 | |
fa0d34be MP |
3066 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, |
3067 | "sd_revalidate_disk\n")); | |
1da177e4 LT |
3068 | |
3069 | /* | |
3070 | * If the device is offline, don't try and read capacity or any | |
3071 | * of the other niceties. | |
3072 | */ | |
3073 | if (!scsi_device_online(sdp)) | |
3074 | goto out; | |
3075 | ||
a6123f14 | 3076 | buffer = kmalloc(SD_BUF_SIZE, GFP_KERNEL); |
1da177e4 | 3077 | if (!buffer) { |
e73aec82 MP |
3078 | sd_printk(KERN_WARNING, sdkp, "sd_revalidate_disk: Memory " |
3079 | "allocation failure.\n"); | |
ea73a9f2 | 3080 | goto out; |
1da177e4 LT |
3081 | } |
3082 | ||
e73aec82 | 3083 | sd_spinup_disk(sdkp); |
1da177e4 LT |
3084 | |
3085 | /* | |
3086 | * Without media there is no reason to ask; moreover, some devices | |
3087 | * react badly if we do. | |
3088 | */ | |
3089 | if (sdkp->media_present) { | |
e73aec82 | 3090 | sd_read_capacity(sdkp, buffer); |
ffd4bc2a | 3091 | |
5ddfe085 | 3092 | if (scsi_device_supports_vpd(sdp)) { |
c98a0eb0 | 3093 | sd_read_block_provisioning(sdkp); |
ffd4bc2a MP |
3094 | sd_read_block_limits(sdkp); |
3095 | sd_read_block_characteristics(sdkp); | |
89d94756 | 3096 | sd_zbc_read_zones(sdkp, buffer); |
ffd4bc2a MP |
3097 | } |
3098 | ||
89d94756 HR |
3099 | sd_print_capacity(sdkp, old_capacity); |
3100 | ||
e73aec82 MP |
3101 | sd_read_write_protect_flag(sdkp, buffer); |
3102 | sd_read_cache_type(sdkp, buffer); | |
e0597d70 | 3103 | sd_read_app_tag_own(sdkp, buffer); |
5db44863 | 3104 | sd_read_write_same(sdkp, buffer); |
d80210f2 | 3105 | sd_read_security(sdkp, buffer); |
1da177e4 | 3106 | } |
461d4e90 TH |
3107 | |
3108 | /* | |
3109 | * We now have all cache related info, determine how we deal | |
4913efe4 | 3110 | * with flush requests. |
461d4e90 | 3111 | */ |
cb2fb68d | 3112 | sd_set_flush_flag(sdkp); |
461d4e90 | 3113 | |
ca369d51 MP |
3114 | /* Initial block count limit based on CDB TRANSFER LENGTH field size. */ |
3115 | dev_max = sdp->use_16_for_rw ? SD_MAX_XFER_BLOCKS : SD_DEF_XFER_BLOCKS; | |
3116 | ||
3117 | /* Some devices report a maximum block count for READ/WRITE requests. */ | |
3118 | dev_max = min_not_zero(dev_max, sdkp->max_xfer_blocks); | |
3119 | q->limits.max_dev_sectors = logical_to_sectors(sdp, dev_max); | |
3120 | ||
3121 | /* | |
77082ca5 | 3122 | * Determine the device's preferred I/O size for reads and writes |
9c1d9c20 MP |
3123 | * unless the reported value is unreasonably small, large, or |
3124 | * garbage. | |
ca369d51 | 3125 | */ |
9c1d9c20 MP |
3126 | if (sdkp->opt_xfer_blocks && |
3127 | sdkp->opt_xfer_blocks <= dev_max && | |
3128 | sdkp->opt_xfer_blocks <= SD_DEF_XFER_BLOCKS && | |
6b7e9cde MP |
3129 | logical_to_bytes(sdp, sdkp->opt_xfer_blocks) >= PAGE_SIZE) { |
3130 | q->limits.io_opt = logical_to_bytes(sdp, sdkp->opt_xfer_blocks); | |
3131 | rw_max = logical_to_sectors(sdp, sdkp->opt_xfer_blocks); | |
3132 | } else | |
67804145 FZ |
3133 | rw_max = min_not_zero(logical_to_sectors(sdp, dev_max), |
3134 | (sector_t)BLK_DEF_MAX_SECTORS); | |
3a9794d3 | 3135 | |
77082ca5 MP |
3136 | /* Do not exceed controller limit */ |
3137 | rw_max = min(rw_max, queue_max_hw_sectors(q)); | |
3138 | ||
3139 | /* | |
3140 | * Only update max_sectors if previously unset or if the current value | |
3141 | * exceeds the capabilities of the hardware. | |
3142 | */ | |
3143 | if (sdkp->first_scan || | |
3144 | q->limits.max_sectors > q->limits.max_dev_sectors || | |
3145 | q->limits.max_sectors > q->limits.max_hw_sectors) | |
3146 | q->limits.max_sectors = rw_max; | |
3147 | ||
3148 | sdkp->first_scan = 0; | |
4f258a46 | 3149 | |
f08bb1e0 | 3150 | set_capacity(disk, logical_to_sectors(sdp, sdkp->capacity)); |
5db44863 | 3151 | sd_config_write_same(sdkp); |
1da177e4 LT |
3152 | kfree(buffer); |
3153 | ||
1da177e4 LT |
3154 | out: |
3155 | return 0; | |
3156 | } | |
3157 | ||
72ec24bd TH |
3158 | /** |
3159 | * sd_unlock_native_capacity - unlock native capacity | |
3160 | * @disk: struct gendisk to set capacity for | |
3161 | * | |
3162 | * Block layer calls this function if it detects that partitions | |
3163 | * on @disk reach beyond the end of the device. If the SCSI host | |
3164 | * implements ->unlock_native_capacity() method, it's invoked to | |
3165 | * give it a chance to adjust the device capacity. | |
3166 | * | |
3167 | * CONTEXT: | |
3168 | * Defined by block layer. Might sleep. | |
3169 | */ | |
3170 | static void sd_unlock_native_capacity(struct gendisk *disk) | |
3171 | { | |
3172 | struct scsi_device *sdev = scsi_disk(disk)->device; | |
3173 | ||
3174 | if (sdev->host->hostt->unlock_native_capacity) | |
3175 | sdev->host->hostt->unlock_native_capacity(sdev); | |
3176 | } | |
3177 | ||
3e1a7ff8 TH |
3178 | /** |
3179 | * sd_format_disk_name - format disk name | |
3180 | * @prefix: name prefix - ie. "sd" for SCSI disks | |
3181 | * @index: index of the disk to format name for | |
3182 | * @buf: output buffer | |
3183 | * @buflen: length of the output buffer | |
3184 | * | |
3185 | * SCSI disk names starts at sda. The 26th device is sdz and the | |
3186 | * 27th is sdaa. The last one for two lettered suffix is sdzz | |
3187 | * which is followed by sdaaa. | |
3188 | * | |
3189 | * This is basically 26 base counting with one extra 'nil' entry | |
3ad2f3fb | 3190 | * at the beginning from the second digit on and can be |
3e1a7ff8 TH |
3191 | * determined using similar method as 26 base conversion with the |
3192 | * index shifted -1 after each digit is computed. | |
3193 | * | |
3194 | * CONTEXT: | |
3195 | * Don't care. | |
3196 | * | |
3197 | * RETURNS: | |
3198 | * 0 on success, -errno on failure. | |
3199 | */ | |
3200 | static int sd_format_disk_name(char *prefix, int index, char *buf, int buflen) | |
3201 | { | |
3202 | const int base = 'z' - 'a' + 1; | |
3203 | char *begin = buf + strlen(prefix); | |
3204 | char *end = buf + buflen; | |
3205 | char *p; | |
3206 | int unit; | |
3207 | ||
3208 | p = end - 1; | |
3209 | *p = '\0'; | |
3210 | unit = base; | |
3211 | do { | |
3212 | if (p == begin) | |
3213 | return -EINVAL; | |
3214 | *--p = 'a' + (index % unit); | |
3215 | index = (index / unit) - 1; | |
3216 | } while (index >= 0); | |
3217 | ||
3218 | memmove(begin, p, end - p); | |
3219 | memcpy(buf, prefix, strlen(prefix)); | |
3220 | ||
3221 | return 0; | |
3222 | } | |
3223 | ||
4ace92fc AV |
3224 | /* |
3225 | * The asynchronous part of sd_probe | |
3226 | */ | |
3227 | static void sd_probe_async(void *data, async_cookie_t cookie) | |
3228 | { | |
3229 | struct scsi_disk *sdkp = data; | |
3230 | struct scsi_device *sdp; | |
3231 | struct gendisk *gd; | |
3232 | u32 index; | |
3233 | struct device *dev; | |
3234 | ||
3235 | sdp = sdkp->device; | |
3236 | gd = sdkp->disk; | |
3237 | index = sdkp->index; | |
3238 | dev = &sdp->sdev_gendev; | |
3239 | ||
1a03ae0f MR |
3240 | gd->major = sd_major((index & 0xf0) >> 4); |
3241 | gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00); | |
1a03ae0f | 3242 | |
4ace92fc AV |
3243 | gd->fops = &sd_fops; |
3244 | gd->private_data = &sdkp->driver; | |
3245 | gd->queue = sdkp->device->request_queue; | |
3246 | ||
70a9b873 MP |
3247 | /* defaults, until the device tells us otherwise */ |
3248 | sdp->sector_size = 512; | |
3249 | sdkp->capacity = 0; | |
3250 | sdkp->media_present = 1; | |
3251 | sdkp->write_prot = 0; | |
39c60a09 | 3252 | sdkp->cache_override = 0; |
70a9b873 MP |
3253 | sdkp->WCE = 0; |
3254 | sdkp->RCD = 0; | |
3255 | sdkp->ATO = 0; | |
3256 | sdkp->first_scan = 1; | |
18a4d0a2 | 3257 | sdkp->max_medium_access_timeouts = SD_MAX_MEDIUM_TIMEOUTS; |
70a9b873 | 3258 | |
4ace92fc AV |
3259 | sd_revalidate_disk(gd); |
3260 | ||
97fedbbe | 3261 | gd->flags = GENHD_FL_EXT_DEVT; |
2bae0093 | 3262 | if (sdp->removable) { |
4ace92fc | 3263 | gd->flags |= GENHD_FL_REMOVABLE; |
2bae0093 TH |
3264 | gd->events |= DISK_EVENT_MEDIA_CHANGE; |
3265 | } | |
4ace92fc | 3266 | |
10c580e4 | 3267 | blk_pm_runtime_init(sdp->request_queue, dev); |
fef912bf | 3268 | device_add_disk(dev, gd, NULL); |
fe542396 MP |
3269 | if (sdkp->capacity) |
3270 | sd_dif_config_host(sdkp); | |
4ace92fc | 3271 | |
3821d768 MP |
3272 | sd_revalidate_disk(gd); |
3273 | ||
d80210f2 CH |
3274 | if (sdkp->security) { |
3275 | sdkp->opal_dev = init_opal_dev(sdp, &sd_sec_submit); | |
3276 | if (sdkp->opal_dev) | |
3277 | sd_printk(KERN_NOTICE, sdkp, "supports TCG Opal\n"); | |
3278 | } | |
3279 | ||
4ace92fc AV |
3280 | sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n", |
3281 | sdp->removable ? "removable " : ""); | |
478a8a05 | 3282 | scsi_autopm_put_device(sdp); |
ea038f63 | 3283 | put_device(&sdkp->dev); |
4ace92fc AV |
3284 | } |
3285 | ||
1da177e4 LT |
3286 | /** |
3287 | * sd_probe - called during driver initialization and whenever a | |
3288 | * new scsi device is attached to the system. It is called once | |
3289 | * for each scsi device (not just disks) present. | |
3290 | * @dev: pointer to device object | |
3291 | * | |
3292 | * Returns 0 if successful (or not interested in this scsi device | |
3293 | * (e.g. scanner)); 1 when there is an error. | |
3294 | * | |
3295 | * Note: this function is invoked from the scsi mid-level. | |
3296 | * This function sets up the mapping between a given | |
3297 | * <host,channel,id,lun> (found in sdp) and new device name | |
3298 | * (e.g. /dev/sda). More precisely it is the block device major | |
3299 | * and minor number that is chosen here. | |
3300 | * | |
2db93ce8 PU |
3301 | * Assume sd_probe is not re-entrant (for time being) |
3302 | * Also think about sd_probe() and sd_remove() running coincidentally. | |
1da177e4 LT |
3303 | **/ |
3304 | static int sd_probe(struct device *dev) | |
3305 | { | |
3306 | struct scsi_device *sdp = to_scsi_device(dev); | |
3307 | struct scsi_disk *sdkp; | |
3308 | struct gendisk *gd; | |
439d77f7 | 3309 | int index; |
1da177e4 LT |
3310 | int error; |
3311 | ||
6fe8c1db | 3312 | scsi_autopm_get_device(sdp); |
1da177e4 | 3313 | error = -ENODEV; |
89d94756 HR |
3314 | if (sdp->type != TYPE_DISK && |
3315 | sdp->type != TYPE_ZBC && | |
3316 | sdp->type != TYPE_MOD && | |
3317 | sdp->type != TYPE_RBC) | |
1da177e4 LT |
3318 | goto out; |
3319 | ||
89d94756 HR |
3320 | #ifndef CONFIG_BLK_DEV_ZONED |
3321 | if (sdp->type == TYPE_ZBC) | |
3322 | goto out; | |
3323 | #endif | |
9ccfc756 | 3324 | SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO, sdp, |
2db93ce8 | 3325 | "sd_probe\n")); |
1da177e4 LT |
3326 | |
3327 | error = -ENOMEM; | |
24669f75 | 3328 | sdkp = kzalloc(sizeof(*sdkp), GFP_KERNEL); |
1da177e4 LT |
3329 | if (!sdkp) |
3330 | goto out; | |
3331 | ||
689d6fac | 3332 | gd = alloc_disk(SD_MINORS); |
1da177e4 | 3333 | if (!gd) |
c01228db | 3334 | goto out_free; |
1da177e4 | 3335 | |
94015080 MW |
3336 | index = ida_alloc(&sd_index_ida, GFP_KERNEL); |
3337 | if (index < 0) { | |
21208ae5 | 3338 | sdev_printk(KERN_WARNING, sdp, "sd_probe: memory exhausted.\n"); |
1da177e4 | 3339 | goto out_put; |
1a03ae0f MR |
3340 | } |
3341 | ||
3e1a7ff8 | 3342 | error = sd_format_disk_name("sd", index, gd->disk_name, DISK_NAME_LEN); |
21208ae5 DK |
3343 | if (error) { |
3344 | sdev_printk(KERN_WARNING, sdp, "SCSI disk (sd) name length exceeded.\n"); | |
f27bac27 | 3345 | goto out_free_index; |
21208ae5 | 3346 | } |
f27bac27 | 3347 | |
1da177e4 LT |
3348 | sdkp->device = sdp; |
3349 | sdkp->driver = &sd_template; | |
3350 | sdkp->disk = gd; | |
3351 | sdkp->index = index; | |
409f3499 | 3352 | atomic_set(&sdkp->openers, 0); |
9e1a1537 | 3353 | atomic_set(&sdkp->device->ioerr_cnt, 0); |
1da177e4 | 3354 | |
601e7638 JB |
3355 | if (!sdp->request_queue->rq_timeout) { |
3356 | if (sdp->type != TYPE_MOD) | |
3357 | blk_queue_rq_timeout(sdp->request_queue, SD_TIMEOUT); | |
3358 | else | |
3359 | blk_queue_rq_timeout(sdp->request_queue, | |
3360 | SD_MOD_TIMEOUT); | |
3361 | } | |
3362 | ||
3363 | device_initialize(&sdkp->dev); | |
478a8a05 | 3364 | sdkp->dev.parent = dev; |
601e7638 | 3365 | sdkp->dev.class = &sd_disk_class; |
02aa2a37 | 3366 | dev_set_name(&sdkp->dev, "%s", dev_name(dev)); |
601e7638 | 3367 | |
dee0586e DC |
3368 | error = device_add(&sdkp->dev); |
3369 | if (error) | |
601e7638 JB |
3370 | goto out_free_index; |
3371 | ||
478a8a05 AS |
3372 | get_device(dev); |
3373 | dev_set_drvdata(dev, sdkp); | |
601e7638 | 3374 | |
ea038f63 | 3375 | get_device(&sdkp->dev); /* prevent release before async_schedule */ |
a7a20d10 | 3376 | async_schedule_domain(sd_probe_async, sdkp, &scsi_sd_probe_domain); |
1da177e4 LT |
3377 | |
3378 | return 0; | |
3379 | ||
f27bac27 | 3380 | out_free_index: |
94015080 | 3381 | ida_free(&sd_index_ida, index); |
6bdaa1f1 | 3382 | out_put: |
1da177e4 | 3383 | put_disk(gd); |
f170396c CIK |
3384 | out_free: |
3385 | kfree(sdkp); | |
6bdaa1f1 | 3386 | out: |
6fe8c1db | 3387 | scsi_autopm_put_device(sdp); |
1da177e4 LT |
3388 | return error; |
3389 | } | |
3390 | ||
3391 | /** | |
3392 | * sd_remove - called whenever a scsi disk (previously recognized by | |
3393 | * sd_probe) is detached from the system. It is called (potentially | |
3394 | * multiple times) during sd module unload. | |
f2a3313d | 3395 | * @dev: pointer to device object |
1da177e4 LT |
3396 | * |
3397 | * Note: this function is invoked from the scsi mid-level. | |
3398 | * This function potentially frees up a device name (e.g. /dev/sdc) | |
3399 | * that could be re-used by a subsequent sd_probe(). | |
3400 | * This function is not called when the built-in sd driver is "exit-ed". | |
3401 | **/ | |
3402 | static int sd_remove(struct device *dev) | |
3403 | { | |
601e7638 | 3404 | struct scsi_disk *sdkp; |
0761df9c | 3405 | dev_t devt; |
1da177e4 | 3406 | |
601e7638 | 3407 | sdkp = dev_get_drvdata(dev); |
0761df9c | 3408 | devt = disk_devt(sdkp->disk); |
478a8a05 AS |
3409 | scsi_autopm_get_device(sdkp->device); |
3410 | ||
3c31b52f | 3411 | async_synchronize_full_domain(&scsi_sd_pm_domain); |
a7a20d10 | 3412 | async_synchronize_full_domain(&scsi_sd_probe_domain); |
ee959b00 | 3413 | device_del(&sdkp->dev); |
1da177e4 LT |
3414 | del_gendisk(sdkp->disk); |
3415 | sd_shutdown(dev); | |
39b7f1e2 | 3416 | |
d80210f2 CH |
3417 | free_opal_dev(sdkp->opal_dev); |
3418 | ||
0761df9c HR |
3419 | blk_register_region(devt, SD_MINORS, NULL, |
3420 | sd_default_probe, NULL, NULL); | |
3421 | ||
0b950672 | 3422 | mutex_lock(&sd_ref_mutex); |
39b7f1e2 | 3423 | dev_set_drvdata(dev, NULL); |
ee959b00 | 3424 | put_device(&sdkp->dev); |
0b950672 | 3425 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
3426 | |
3427 | return 0; | |
3428 | } | |
3429 | ||
3430 | /** | |
3431 | * scsi_disk_release - Called to free the scsi_disk structure | |
ee959b00 | 3432 | * @dev: pointer to embedded class device |
1da177e4 | 3433 | * |
0b950672 | 3434 | * sd_ref_mutex must be held entering this routine. Because it is |
1da177e4 LT |
3435 | * called on last put, you should always use the scsi_disk_get() |
3436 | * scsi_disk_put() helpers which manipulate the semaphore directly | |
ee959b00 | 3437 | * and never do a direct put_device. |
1da177e4 | 3438 | **/ |
ee959b00 | 3439 | static void scsi_disk_release(struct device *dev) |
1da177e4 | 3440 | { |
ee959b00 | 3441 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
1da177e4 LT |
3442 | struct gendisk *disk = sdkp->disk; |
3443 | ||
94015080 | 3444 | ida_free(&sd_index_ida, sdkp->index); |
c01228db | 3445 | |
1da177e4 | 3446 | disk->private_data = NULL; |
1da177e4 | 3447 | put_disk(disk); |
39b7f1e2 | 3448 | put_device(&sdkp->device->sdev_gendev); |
1da177e4 LT |
3449 | |
3450 | kfree(sdkp); | |
3451 | } | |
3452 | ||
cc5d2c8c | 3453 | static int sd_start_stop_device(struct scsi_disk *sdkp, int start) |
c3c94c5a TH |
3454 | { |
3455 | unsigned char cmd[6] = { START_STOP }; /* START_VALID */ | |
3456 | struct scsi_sense_hdr sshdr; | |
cc5d2c8c | 3457 | struct scsi_device *sdp = sdkp->device; |
c3c94c5a TH |
3458 | int res; |
3459 | ||
3460 | if (start) | |
3461 | cmd[4] |= 1; /* START */ | |
3462 | ||
d2886ea3 SR |
3463 | if (sdp->start_stop_pwr_cond) |
3464 | cmd[4] |= start ? 1 << 4 : 3 << 4; /* Active or Standby */ | |
3465 | ||
c3c94c5a TH |
3466 | if (!scsi_device_online(sdp)) |
3467 | return -ENODEV; | |
3468 | ||
fcbfffe2 CH |
3469 | res = scsi_execute(sdp, cmd, DMA_NONE, NULL, 0, NULL, &sshdr, |
3470 | SD_TIMEOUT, SD_MAX_RETRIES, 0, RQF_PM, NULL); | |
c3c94c5a | 3471 | if (res) { |
ef61329d | 3472 | sd_print_result(sdkp, "Start/Stop Unit failed", res); |
c65be1a6 | 3473 | if (driver_byte(res) == DRIVER_SENSE) |
cc5d2c8c | 3474 | sd_print_sense_hdr(sdkp, &sshdr); |
95897910 ON |
3475 | if (scsi_sense_valid(&sshdr) && |
3476 | /* 0x3a is medium not present */ | |
3477 | sshdr.asc == 0x3a) | |
3478 | res = 0; | |
c3c94c5a TH |
3479 | } |
3480 | ||
95897910 ON |
3481 | /* SCSI error codes must not go to the generic layer */ |
3482 | if (res) | |
3483 | return -EIO; | |
3484 | ||
3485 | return 0; | |
c3c94c5a TH |
3486 | } |
3487 | ||
1da177e4 LT |
3488 | /* |
3489 | * Send a SYNCHRONIZE CACHE instruction down to the device through | |
3490 | * the normal SCSI command structure. Wait for the command to | |
3491 | * complete. | |
3492 | */ | |
3493 | static void sd_shutdown(struct device *dev) | |
3494 | { | |
3d9a1f53 | 3495 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
1da177e4 LT |
3496 | |
3497 | if (!sdkp) | |
3498 | return; /* this can happen */ | |
3499 | ||
54f57588 | 3500 | if (pm_runtime_suspended(dev)) |
3d9a1f53 | 3501 | return; |
54f57588 | 3502 | |
95897910 | 3503 | if (sdkp->WCE && sdkp->media_present) { |
e73aec82 | 3504 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
4fa83244 | 3505 | sd_sync_cache(sdkp, NULL); |
39b7f1e2 | 3506 | } |
c3c94c5a | 3507 | |
cc5d2c8c JB |
3508 | if (system_state != SYSTEM_RESTART && sdkp->device->manage_start_stop) { |
3509 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); | |
3510 | sd_start_stop_device(sdkp, 0); | |
c3c94c5a | 3511 | } |
39b7f1e2 | 3512 | } |
1da177e4 | 3513 | |
95897910 | 3514 | static int sd_suspend_common(struct device *dev, bool ignore_stop_errors) |
c3c94c5a | 3515 | { |
3d9a1f53 | 3516 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
4fa83244 | 3517 | struct scsi_sense_hdr sshdr; |
09ff92fe | 3518 | int ret = 0; |
c3c94c5a | 3519 | |
13b43891 AS |
3520 | if (!sdkp) /* E.g.: runtime suspend following sd_remove() */ |
3521 | return 0; | |
c3c94c5a | 3522 | |
95897910 | 3523 | if (sdkp->WCE && sdkp->media_present) { |
cc5d2c8c | 3524 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
4fa83244 DB |
3525 | ret = sd_sync_cache(sdkp, &sshdr); |
3526 | ||
95897910 ON |
3527 | if (ret) { |
3528 | /* ignore OFFLINE device */ | |
3529 | if (ret == -ENODEV) | |
4fa83244 DB |
3530 | return 0; |
3531 | ||
3532 | if (!scsi_sense_valid(&sshdr) || | |
3533 | sshdr.sense_key != ILLEGAL_REQUEST) | |
3534 | return ret; | |
3535 | ||
3536 | /* | |
3537 | * sshdr.sense_key == ILLEGAL_REQUEST means this drive | |
3538 | * doesn't support sync. There's not much to do and | |
3539 | * suspend shouldn't fail. | |
3540 | */ | |
ed91f7ed | 3541 | ret = 0; |
95897910 | 3542 | } |
c3c94c5a TH |
3543 | } |
3544 | ||
691e3d31 | 3545 | if (sdkp->device->manage_start_stop) { |
cc5d2c8c | 3546 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); |
95897910 | 3547 | /* an error is not worth aborting a system sleep */ |
cc5d2c8c | 3548 | ret = sd_start_stop_device(sdkp, 0); |
95897910 ON |
3549 | if (ignore_stop_errors) |
3550 | ret = 0; | |
c3c94c5a TH |
3551 | } |
3552 | ||
09ff92fe | 3553 | return ret; |
c3c94c5a TH |
3554 | } |
3555 | ||
95897910 ON |
3556 | static int sd_suspend_system(struct device *dev) |
3557 | { | |
3558 | return sd_suspend_common(dev, true); | |
3559 | } | |
3560 | ||
3561 | static int sd_suspend_runtime(struct device *dev) | |
3562 | { | |
3563 | return sd_suspend_common(dev, false); | |
3564 | } | |
3565 | ||
c3c94c5a TH |
3566 | static int sd_resume(struct device *dev) |
3567 | { | |
3d9a1f53 | 3568 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
d80210f2 | 3569 | int ret; |
c3c94c5a | 3570 | |
13b43891 AS |
3571 | if (!sdkp) /* E.g.: runtime resume at the start of sd_probe() */ |
3572 | return 0; | |
3573 | ||
cc5d2c8c | 3574 | if (!sdkp->device->manage_start_stop) |
3d9a1f53 | 3575 | return 0; |
c3c94c5a | 3576 | |
cc5d2c8c | 3577 | sd_printk(KERN_NOTICE, sdkp, "Starting disk\n"); |
d80210f2 CH |
3578 | ret = sd_start_stop_device(sdkp, 1); |
3579 | if (!ret) | |
3580 | opal_unlock_from_suspend(sdkp->opal_dev); | |
3581 | return ret; | |
c3c94c5a TH |
3582 | } |
3583 | ||
1da177e4 LT |
3584 | /** |
3585 | * init_sd - entry point for this driver (both when built in or when | |
3586 | * a module). | |
3587 | * | |
3588 | * Note: this function registers this driver with the scsi mid-level. | |
3589 | **/ | |
3590 | static int __init init_sd(void) | |
3591 | { | |
5e4009ba | 3592 | int majors = 0, i, err; |
1da177e4 LT |
3593 | |
3594 | SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n")); | |
3595 | ||
0761df9c HR |
3596 | for (i = 0; i < SD_MAJORS; i++) { |
3597 | if (register_blkdev(sd_major(i), "sd") != 0) | |
3598 | continue; | |
3599 | majors++; | |
3600 | blk_register_region(sd_major(i), SD_MINORS, NULL, | |
3601 | sd_default_probe, NULL, NULL); | |
3602 | } | |
1da177e4 LT |
3603 | |
3604 | if (!majors) | |
3605 | return -ENODEV; | |
3606 | ||
5e4009ba JG |
3607 | err = class_register(&sd_disk_class); |
3608 | if (err) | |
3609 | goto err_out; | |
6bdaa1f1 | 3610 | |
4e7392ec MP |
3611 | sd_cdb_cache = kmem_cache_create("sd_ext_cdb", SD_EXT_CDB_SIZE, |
3612 | 0, 0, NULL); | |
3613 | if (!sd_cdb_cache) { | |
3614 | printk(KERN_ERR "sd: can't init extended cdb cache\n"); | |
8d964478 | 3615 | err = -ENOMEM; |
4e7392ec MP |
3616 | goto err_out_class; |
3617 | } | |
3618 | ||
3619 | sd_cdb_pool = mempool_create_slab_pool(SD_MEMPOOL_SIZE, sd_cdb_cache); | |
3620 | if (!sd_cdb_pool) { | |
3621 | printk(KERN_ERR "sd: can't init extended cdb pool\n"); | |
8d964478 | 3622 | err = -ENOMEM; |
4e7392ec MP |
3623 | goto err_out_cache; |
3624 | } | |
3625 | ||
afd5e34b JD |
3626 | err = scsi_register_driver(&sd_template.gendrv); |
3627 | if (err) | |
3628 | goto err_out_driver; | |
3629 | ||
5e4009ba JG |
3630 | return 0; |
3631 | ||
afd5e34b JD |
3632 | err_out_driver: |
3633 | mempool_destroy(sd_cdb_pool); | |
3634 | ||
4e7392ec MP |
3635 | err_out_cache: |
3636 | kmem_cache_destroy(sd_cdb_cache); | |
3637 | ||
5e4009ba JG |
3638 | err_out_class: |
3639 | class_unregister(&sd_disk_class); | |
3640 | err_out: | |
3641 | for (i = 0; i < SD_MAJORS; i++) | |
3642 | unregister_blkdev(sd_major(i), "sd"); | |
3643 | return err; | |
1da177e4 LT |
3644 | } |
3645 | ||
3646 | /** | |
3647 | * exit_sd - exit point for this driver (when it is a module). | |
3648 | * | |
3649 | * Note: this function unregisters this driver from the scsi mid-level. | |
3650 | **/ | |
3651 | static void __exit exit_sd(void) | |
3652 | { | |
3653 | int i; | |
3654 | ||
3655 | SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n")); | |
3656 | ||
afd5e34b | 3657 | scsi_unregister_driver(&sd_template.gendrv); |
4e7392ec MP |
3658 | mempool_destroy(sd_cdb_pool); |
3659 | kmem_cache_destroy(sd_cdb_cache); | |
3660 | ||
5e4009ba JG |
3661 | class_unregister(&sd_disk_class); |
3662 | ||
0761df9c HR |
3663 | for (i = 0; i < SD_MAJORS; i++) { |
3664 | blk_unregister_region(sd_major(i), SD_MINORS); | |
1da177e4 | 3665 | unregister_blkdev(sd_major(i), "sd"); |
0761df9c | 3666 | } |
1da177e4 LT |
3667 | } |
3668 | ||
1da177e4 LT |
3669 | module_init(init_sd); |
3670 | module_exit(exit_sd); | |
e73aec82 MP |
3671 | |
3672 | static void sd_print_sense_hdr(struct scsi_disk *sdkp, | |
3673 | struct scsi_sense_hdr *sshdr) | |
3674 | { | |
21045519 HR |
3675 | scsi_print_sense_hdr(sdkp->device, |
3676 | sdkp->disk ? sdkp->disk->disk_name : NULL, sshdr); | |
e73aec82 MP |
3677 | } |
3678 | ||
ef61329d HR |
3679 | static void sd_print_result(const struct scsi_disk *sdkp, const char *msg, |
3680 | int result) | |
e73aec82 | 3681 | { |
ef61329d HR |
3682 | const char *hb_string = scsi_hostbyte_string(result); |
3683 | const char *db_string = scsi_driverbyte_string(result); | |
3684 | ||
3685 | if (hb_string || db_string) | |
3686 | sd_printk(KERN_INFO, sdkp, | |
3687 | "%s: Result: hostbyte=%s driverbyte=%s\n", msg, | |
3688 | hb_string ? hb_string : "invalid", | |
3689 | db_string ? db_string : "invalid"); | |
3690 | else | |
3691 | sd_printk(KERN_INFO, sdkp, | |
3692 | "%s: Result: hostbyte=0x%02x driverbyte=0x%02x\n", | |
3693 | msg, host_byte(result), driver_byte(result)); | |
e73aec82 MP |
3694 | } |
3695 |