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1da177e4 LT |
1 | /* |
2 | * sd.c Copyright (C) 1992 Drew Eckhardt | |
3 | * Copyright (C) 1993, 1994, 1995, 1999 Eric Youngdale | |
4 | * | |
5 | * Linux scsi disk driver | |
6 | * Initial versions: Drew Eckhardt | |
7 | * Subsequent revisions: Eric Youngdale | |
8 | * Modification history: | |
9 | * - Drew Eckhardt <drew@colorado.edu> original | |
10 | * - Eric Youngdale <eric@andante.org> add scatter-gather, multiple | |
11 | * outstanding request, and other enhancements. | |
12 | * Support loadable low-level scsi drivers. | |
13 | * - Jirka Hanika <geo@ff.cuni.cz> support more scsi disks using | |
14 | * eight major numbers. | |
15 | * - Richard Gooch <rgooch@atnf.csiro.au> support devfs. | |
16 | * - Torben Mathiasen <tmm@image.dk> Resource allocation fixes in | |
17 | * sd_init and cleanups. | |
18 | * - Alex Davis <letmein@erols.com> Fix problem where partition info | |
19 | * not being read in sd_open. Fix problem where removable media | |
20 | * could be ejected after sd_open. | |
21 | * - Douglas Gilbert <dgilbert@interlog.com> cleanup for lk 2.5.x | |
22 | * - Badari Pulavarty <pbadari@us.ibm.com>, Matthew Wilcox | |
23 | * <willy@debian.org>, Kurt Garloff <garloff@suse.de>: | |
24 | * Support 32k/1M disks. | |
25 | * | |
26 | * Logging policy (needs CONFIG_SCSI_LOGGING defined): | |
27 | * - setting up transfer: SCSI_LOG_HLQUEUE levels 1 and 2 | |
28 | * - end of transfer (bh + scsi_lib): SCSI_LOG_HLCOMPLETE level 1 | |
29 | * - entering sd_ioctl: SCSI_LOG_IOCTL level 1 | |
30 | * - entering other commands: SCSI_LOG_HLQUEUE level 3 | |
31 | * Note: when the logging level is set by the user, it must be greater | |
32 | * than the level indicated above to trigger output. | |
33 | */ | |
34 | ||
1da177e4 LT |
35 | #include <linux/module.h> |
36 | #include <linux/fs.h> | |
37 | #include <linux/kernel.h> | |
1da177e4 LT |
38 | #include <linux/mm.h> |
39 | #include <linux/bio.h> | |
40 | #include <linux/genhd.h> | |
41 | #include <linux/hdreg.h> | |
42 | #include <linux/errno.h> | |
43 | #include <linux/idr.h> | |
44 | #include <linux/interrupt.h> | |
45 | #include <linux/init.h> | |
46 | #include <linux/blkdev.h> | |
47 | #include <linux/blkpg.h> | |
1da177e4 | 48 | #include <linux/delay.h> |
0b950672 | 49 | #include <linux/mutex.h> |
7404ad3b | 50 | #include <linux/string_helpers.h> |
4ace92fc | 51 | #include <linux/async.h> |
5a0e3ad6 | 52 | #include <linux/slab.h> |
54f57588 | 53 | #include <linux/pm_runtime.h> |
924d55b0 | 54 | #include <linux/pr.h> |
1da177e4 | 55 | #include <asm/uaccess.h> |
8f76d151 | 56 | #include <asm/unaligned.h> |
1da177e4 LT |
57 | |
58 | #include <scsi/scsi.h> | |
59 | #include <scsi/scsi_cmnd.h> | |
60 | #include <scsi/scsi_dbg.h> | |
61 | #include <scsi/scsi_device.h> | |
62 | #include <scsi/scsi_driver.h> | |
63 | #include <scsi/scsi_eh.h> | |
64 | #include <scsi/scsi_host.h> | |
65 | #include <scsi/scsi_ioctl.h> | |
1da177e4 LT |
66 | #include <scsi/scsicam.h> |
67 | ||
aa91696e | 68 | #include "sd.h" |
a7a20d10 | 69 | #include "scsi_priv.h" |
1da177e4 LT |
70 | #include "scsi_logging.h" |
71 | ||
f018fa55 RH |
72 | MODULE_AUTHOR("Eric Youngdale"); |
73 | MODULE_DESCRIPTION("SCSI disk (sd) driver"); | |
74 | MODULE_LICENSE("GPL"); | |
75 | ||
76 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK0_MAJOR); | |
77 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK1_MAJOR); | |
78 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK2_MAJOR); | |
79 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK3_MAJOR); | |
80 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK4_MAJOR); | |
81 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK5_MAJOR); | |
82 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK6_MAJOR); | |
83 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK7_MAJOR); | |
84 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK8_MAJOR); | |
85 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK9_MAJOR); | |
86 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK10_MAJOR); | |
87 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK11_MAJOR); | |
88 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK12_MAJOR); | |
89 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK13_MAJOR); | |
90 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK14_MAJOR); | |
91 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK15_MAJOR); | |
d7b8bcb0 MT |
92 | MODULE_ALIAS_SCSI_DEVICE(TYPE_DISK); |
93 | MODULE_ALIAS_SCSI_DEVICE(TYPE_MOD); | |
94 | MODULE_ALIAS_SCSI_DEVICE(TYPE_RBC); | |
f018fa55 | 95 | |
870d6656 | 96 | #if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT) |
f615b48c | 97 | #define SD_MINORS 16 |
870d6656 | 98 | #else |
3e1a7ff8 | 99 | #define SD_MINORS 0 |
870d6656 TH |
100 | #endif |
101 | ||
c98a0eb0 | 102 | static void sd_config_discard(struct scsi_disk *, unsigned int); |
5db44863 | 103 | static void sd_config_write_same(struct scsi_disk *); |
7b3d9545 | 104 | static int sd_revalidate_disk(struct gendisk *); |
72ec24bd | 105 | static void sd_unlock_native_capacity(struct gendisk *disk); |
7b3d9545 LT |
106 | static int sd_probe(struct device *); |
107 | static int sd_remove(struct device *); | |
108 | static void sd_shutdown(struct device *); | |
95897910 ON |
109 | static int sd_suspend_system(struct device *); |
110 | static int sd_suspend_runtime(struct device *); | |
7b3d9545 LT |
111 | static int sd_resume(struct device *); |
112 | static void sd_rescan(struct device *); | |
a1b73fc1 CH |
113 | static int sd_init_command(struct scsi_cmnd *SCpnt); |
114 | static void sd_uninit_command(struct scsi_cmnd *SCpnt); | |
7b3d9545 | 115 | static int sd_done(struct scsi_cmnd *); |
2451079b | 116 | static int sd_eh_action(struct scsi_cmnd *, int); |
7b3d9545 | 117 | static void sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer); |
ee959b00 | 118 | static void scsi_disk_release(struct device *cdev); |
7b3d9545 | 119 | static void sd_print_sense_hdr(struct scsi_disk *, struct scsi_sense_hdr *); |
ef61329d | 120 | static void sd_print_result(const struct scsi_disk *, const char *, int); |
7b3d9545 | 121 | |
4034cc68 | 122 | static DEFINE_SPINLOCK(sd_index_lock); |
f27bac27 | 123 | static DEFINE_IDA(sd_index_ida); |
1da177e4 LT |
124 | |
125 | /* This semaphore is used to mediate the 0->1 reference get in the | |
126 | * face of object destruction (i.e. we can't allow a get on an | |
127 | * object after last put) */ | |
0b950672 | 128 | static DEFINE_MUTEX(sd_ref_mutex); |
1da177e4 | 129 | |
439d77f7 HS |
130 | static struct kmem_cache *sd_cdb_cache; |
131 | static mempool_t *sd_cdb_pool; | |
4e7392ec | 132 | |
6bdaa1f1 JB |
133 | static const char *sd_cache_types[] = { |
134 | "write through", "none", "write back", | |
135 | "write back, no read (daft)" | |
136 | }; | |
137 | ||
cb2fb68d VC |
138 | static void sd_set_flush_flag(struct scsi_disk *sdkp) |
139 | { | |
140 | unsigned flush = 0; | |
141 | ||
142 | if (sdkp->WCE) { | |
143 | flush |= REQ_FLUSH; | |
144 | if (sdkp->DPOFUA) | |
145 | flush |= REQ_FUA; | |
146 | } | |
147 | ||
148 | blk_queue_flush(sdkp->disk->queue, flush); | |
149 | } | |
150 | ||
ee959b00 | 151 | static ssize_t |
e1ea2351 GKH |
152 | cache_type_store(struct device *dev, struct device_attribute *attr, |
153 | const char *buf, size_t count) | |
6bdaa1f1 JB |
154 | { |
155 | int i, ct = -1, rcd, wce, sp; | |
ee959b00 | 156 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
157 | struct scsi_device *sdp = sdkp->device; |
158 | char buffer[64]; | |
159 | char *buffer_data; | |
160 | struct scsi_mode_data data; | |
161 | struct scsi_sense_hdr sshdr; | |
2ee3e26c | 162 | static const char temp[] = "temporary "; |
6bdaa1f1 JB |
163 | int len; |
164 | ||
165 | if (sdp->type != TYPE_DISK) | |
166 | /* no cache control on RBC devices; theoretically they | |
167 | * can do it, but there's probably so many exceptions | |
168 | * it's not worth the risk */ | |
169 | return -EINVAL; | |
170 | ||
39c60a09 JB |
171 | if (strncmp(buf, temp, sizeof(temp) - 1) == 0) { |
172 | buf += sizeof(temp) - 1; | |
173 | sdkp->cache_override = 1; | |
174 | } else { | |
175 | sdkp->cache_override = 0; | |
176 | } | |
177 | ||
6391a113 | 178 | for (i = 0; i < ARRAY_SIZE(sd_cache_types); i++) { |
439d77f7 | 179 | len = strlen(sd_cache_types[i]); |
6bdaa1f1 JB |
180 | if (strncmp(sd_cache_types[i], buf, len) == 0 && |
181 | buf[len] == '\n') { | |
182 | ct = i; | |
183 | break; | |
184 | } | |
185 | } | |
186 | if (ct < 0) | |
187 | return -EINVAL; | |
188 | rcd = ct & 0x01 ? 1 : 0; | |
2eefd57b | 189 | wce = (ct & 0x02) && !sdkp->write_prot ? 1 : 0; |
39c60a09 JB |
190 | |
191 | if (sdkp->cache_override) { | |
192 | sdkp->WCE = wce; | |
193 | sdkp->RCD = rcd; | |
cb2fb68d | 194 | sd_set_flush_flag(sdkp); |
39c60a09 JB |
195 | return count; |
196 | } | |
197 | ||
6bdaa1f1 JB |
198 | if (scsi_mode_sense(sdp, 0x08, 8, buffer, sizeof(buffer), SD_TIMEOUT, |
199 | SD_MAX_RETRIES, &data, NULL)) | |
200 | return -EINVAL; | |
a9312fb8 | 201 | len = min_t(size_t, sizeof(buffer), data.length - data.header_length - |
6bdaa1f1 JB |
202 | data.block_descriptor_length); |
203 | buffer_data = buffer + data.header_length + | |
204 | data.block_descriptor_length; | |
205 | buffer_data[2] &= ~0x05; | |
206 | buffer_data[2] |= wce << 2 | rcd; | |
207 | sp = buffer_data[0] & 0x80 ? 1 : 0; | |
2c5d16d6 | 208 | buffer_data[0] &= ~0x80; |
6bdaa1f1 JB |
209 | |
210 | if (scsi_mode_select(sdp, 1, sp, 8, buffer_data, len, SD_TIMEOUT, | |
211 | SD_MAX_RETRIES, &data, &sshdr)) { | |
212 | if (scsi_sense_valid(&sshdr)) | |
e73aec82 | 213 | sd_print_sense_hdr(sdkp, &sshdr); |
6bdaa1f1 JB |
214 | return -EINVAL; |
215 | } | |
f98a8cae | 216 | revalidate_disk(sdkp->disk); |
6bdaa1f1 JB |
217 | return count; |
218 | } | |
219 | ||
ee959b00 | 220 | static ssize_t |
e1ea2351 GKH |
221 | manage_start_stop_show(struct device *dev, struct device_attribute *attr, |
222 | char *buf) | |
223 | { | |
224 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
225 | struct scsi_device *sdp = sdkp->device; | |
226 | ||
227 | return snprintf(buf, 20, "%u\n", sdp->manage_start_stop); | |
228 | } | |
229 | ||
230 | static ssize_t | |
231 | manage_start_stop_store(struct device *dev, struct device_attribute *attr, | |
232 | const char *buf, size_t count) | |
c3c94c5a | 233 | { |
ee959b00 | 234 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
c3c94c5a TH |
235 | struct scsi_device *sdp = sdkp->device; |
236 | ||
237 | if (!capable(CAP_SYS_ADMIN)) | |
238 | return -EACCES; | |
239 | ||
240 | sdp->manage_start_stop = simple_strtoul(buf, NULL, 10); | |
241 | ||
242 | return count; | |
243 | } | |
e1ea2351 | 244 | static DEVICE_ATTR_RW(manage_start_stop); |
c3c94c5a | 245 | |
ee959b00 | 246 | static ssize_t |
e1ea2351 GKH |
247 | allow_restart_show(struct device *dev, struct device_attribute *attr, char *buf) |
248 | { | |
249 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
250 | ||
251 | return snprintf(buf, 40, "%d\n", sdkp->device->allow_restart); | |
252 | } | |
253 | ||
254 | static ssize_t | |
255 | allow_restart_store(struct device *dev, struct device_attribute *attr, | |
256 | const char *buf, size_t count) | |
a144c5ae | 257 | { |
ee959b00 | 258 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
a144c5ae BK |
259 | struct scsi_device *sdp = sdkp->device; |
260 | ||
261 | if (!capable(CAP_SYS_ADMIN)) | |
262 | return -EACCES; | |
263 | ||
264 | if (sdp->type != TYPE_DISK) | |
265 | return -EINVAL; | |
266 | ||
267 | sdp->allow_restart = simple_strtoul(buf, NULL, 10); | |
268 | ||
269 | return count; | |
270 | } | |
e1ea2351 | 271 | static DEVICE_ATTR_RW(allow_restart); |
a144c5ae | 272 | |
ee959b00 | 273 | static ssize_t |
e1ea2351 | 274 | cache_type_show(struct device *dev, struct device_attribute *attr, char *buf) |
6bdaa1f1 | 275 | { |
ee959b00 | 276 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
277 | int ct = sdkp->RCD + 2*sdkp->WCE; |
278 | ||
279 | return snprintf(buf, 40, "%s\n", sd_cache_types[ct]); | |
280 | } | |
e1ea2351 | 281 | static DEVICE_ATTR_RW(cache_type); |
6bdaa1f1 | 282 | |
ee959b00 | 283 | static ssize_t |
e1ea2351 | 284 | FUA_show(struct device *dev, struct device_attribute *attr, char *buf) |
6bdaa1f1 | 285 | { |
ee959b00 | 286 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
287 | |
288 | return snprintf(buf, 20, "%u\n", sdkp->DPOFUA); | |
289 | } | |
e1ea2351 | 290 | static DEVICE_ATTR_RO(FUA); |
6bdaa1f1 | 291 | |
ee959b00 | 292 | static ssize_t |
e1ea2351 GKH |
293 | protection_type_show(struct device *dev, struct device_attribute *attr, |
294 | char *buf) | |
e0597d70 MP |
295 | { |
296 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
297 | ||
298 | return snprintf(buf, 20, "%u\n", sdkp->protection_type); | |
299 | } | |
300 | ||
8172499a | 301 | static ssize_t |
e1ea2351 GKH |
302 | protection_type_store(struct device *dev, struct device_attribute *attr, |
303 | const char *buf, size_t count) | |
8172499a MP |
304 | { |
305 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
306 | unsigned int val; | |
307 | int err; | |
308 | ||
309 | if (!capable(CAP_SYS_ADMIN)) | |
310 | return -EACCES; | |
311 | ||
312 | err = kstrtouint(buf, 10, &val); | |
313 | ||
314 | if (err) | |
315 | return err; | |
316 | ||
317 | if (val >= 0 && val <= SD_DIF_TYPE3_PROTECTION) | |
318 | sdkp->protection_type = val; | |
319 | ||
320 | return count; | |
321 | } | |
e1ea2351 | 322 | static DEVICE_ATTR_RW(protection_type); |
8172499a | 323 | |
518fa8e3 | 324 | static ssize_t |
e1ea2351 GKH |
325 | protection_mode_show(struct device *dev, struct device_attribute *attr, |
326 | char *buf) | |
518fa8e3 MP |
327 | { |
328 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
329 | struct scsi_device *sdp = sdkp->device; | |
330 | unsigned int dif, dix; | |
331 | ||
332 | dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type); | |
333 | dix = scsi_host_dix_capable(sdp->host, sdkp->protection_type); | |
334 | ||
335 | if (!dix && scsi_host_dix_capable(sdp->host, SD_DIF_TYPE0_PROTECTION)) { | |
336 | dif = 0; | |
337 | dix = 1; | |
338 | } | |
339 | ||
340 | if (!dif && !dix) | |
341 | return snprintf(buf, 20, "none\n"); | |
342 | ||
343 | return snprintf(buf, 20, "%s%u\n", dix ? "dix" : "dif", dif); | |
344 | } | |
e1ea2351 | 345 | static DEVICE_ATTR_RO(protection_mode); |
518fa8e3 | 346 | |
e0597d70 | 347 | static ssize_t |
e1ea2351 | 348 | app_tag_own_show(struct device *dev, struct device_attribute *attr, char *buf) |
e0597d70 MP |
349 | { |
350 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
351 | ||
352 | return snprintf(buf, 20, "%u\n", sdkp->ATO); | |
353 | } | |
e1ea2351 | 354 | static DEVICE_ATTR_RO(app_tag_own); |
e0597d70 | 355 | |
e339c1a7 | 356 | static ssize_t |
e1ea2351 GKH |
357 | thin_provisioning_show(struct device *dev, struct device_attribute *attr, |
358 | char *buf) | |
e339c1a7 MP |
359 | { |
360 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
361 | ||
c98a0eb0 MP |
362 | return snprintf(buf, 20, "%u\n", sdkp->lbpme); |
363 | } | |
e1ea2351 | 364 | static DEVICE_ATTR_RO(thin_provisioning); |
c98a0eb0 MP |
365 | |
366 | static const char *lbp_mode[] = { | |
367 | [SD_LBP_FULL] = "full", | |
368 | [SD_LBP_UNMAP] = "unmap", | |
369 | [SD_LBP_WS16] = "writesame_16", | |
370 | [SD_LBP_WS10] = "writesame_10", | |
371 | [SD_LBP_ZERO] = "writesame_zero", | |
372 | [SD_LBP_DISABLE] = "disabled", | |
373 | }; | |
374 | ||
375 | static ssize_t | |
e1ea2351 GKH |
376 | provisioning_mode_show(struct device *dev, struct device_attribute *attr, |
377 | char *buf) | |
c98a0eb0 MP |
378 | { |
379 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
380 | ||
381 | return snprintf(buf, 20, "%s\n", lbp_mode[sdkp->provisioning_mode]); | |
382 | } | |
383 | ||
384 | static ssize_t | |
e1ea2351 GKH |
385 | provisioning_mode_store(struct device *dev, struct device_attribute *attr, |
386 | const char *buf, size_t count) | |
c98a0eb0 MP |
387 | { |
388 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
389 | struct scsi_device *sdp = sdkp->device; | |
390 | ||
391 | if (!capable(CAP_SYS_ADMIN)) | |
392 | return -EACCES; | |
393 | ||
394 | if (sdp->type != TYPE_DISK) | |
395 | return -EINVAL; | |
396 | ||
397 | if (!strncmp(buf, lbp_mode[SD_LBP_UNMAP], 20)) | |
398 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
399 | else if (!strncmp(buf, lbp_mode[SD_LBP_WS16], 20)) | |
400 | sd_config_discard(sdkp, SD_LBP_WS16); | |
401 | else if (!strncmp(buf, lbp_mode[SD_LBP_WS10], 20)) | |
402 | sd_config_discard(sdkp, SD_LBP_WS10); | |
403 | else if (!strncmp(buf, lbp_mode[SD_LBP_ZERO], 20)) | |
404 | sd_config_discard(sdkp, SD_LBP_ZERO); | |
405 | else if (!strncmp(buf, lbp_mode[SD_LBP_DISABLE], 20)) | |
406 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
407 | else | |
408 | return -EINVAL; | |
409 | ||
410 | return count; | |
e339c1a7 | 411 | } |
e1ea2351 | 412 | static DEVICE_ATTR_RW(provisioning_mode); |
e339c1a7 | 413 | |
18a4d0a2 | 414 | static ssize_t |
e1ea2351 GKH |
415 | max_medium_access_timeouts_show(struct device *dev, |
416 | struct device_attribute *attr, char *buf) | |
18a4d0a2 MP |
417 | { |
418 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
419 | ||
420 | return snprintf(buf, 20, "%u\n", sdkp->max_medium_access_timeouts); | |
421 | } | |
422 | ||
423 | static ssize_t | |
e1ea2351 GKH |
424 | max_medium_access_timeouts_store(struct device *dev, |
425 | struct device_attribute *attr, const char *buf, | |
426 | size_t count) | |
18a4d0a2 MP |
427 | { |
428 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
429 | int err; | |
430 | ||
431 | if (!capable(CAP_SYS_ADMIN)) | |
432 | return -EACCES; | |
433 | ||
434 | err = kstrtouint(buf, 10, &sdkp->max_medium_access_timeouts); | |
435 | ||
436 | return err ? err : count; | |
437 | } | |
e1ea2351 | 438 | static DEVICE_ATTR_RW(max_medium_access_timeouts); |
18a4d0a2 | 439 | |
5db44863 | 440 | static ssize_t |
e1ea2351 GKH |
441 | max_write_same_blocks_show(struct device *dev, struct device_attribute *attr, |
442 | char *buf) | |
5db44863 MP |
443 | { |
444 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
445 | ||
446 | return snprintf(buf, 20, "%u\n", sdkp->max_ws_blocks); | |
447 | } | |
448 | ||
449 | static ssize_t | |
e1ea2351 GKH |
450 | max_write_same_blocks_store(struct device *dev, struct device_attribute *attr, |
451 | const char *buf, size_t count) | |
5db44863 MP |
452 | { |
453 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
454 | struct scsi_device *sdp = sdkp->device; | |
455 | unsigned long max; | |
456 | int err; | |
457 | ||
458 | if (!capable(CAP_SYS_ADMIN)) | |
459 | return -EACCES; | |
460 | ||
461 | if (sdp->type != TYPE_DISK) | |
462 | return -EINVAL; | |
463 | ||
464 | err = kstrtoul(buf, 10, &max); | |
465 | ||
466 | if (err) | |
467 | return err; | |
468 | ||
469 | if (max == 0) | |
470 | sdp->no_write_same = 1; | |
66c28f97 MP |
471 | else if (max <= SD_MAX_WS16_BLOCKS) { |
472 | sdp->no_write_same = 0; | |
5db44863 | 473 | sdkp->max_ws_blocks = max; |
66c28f97 | 474 | } |
5db44863 MP |
475 | |
476 | sd_config_write_same(sdkp); | |
477 | ||
478 | return count; | |
479 | } | |
e1ea2351 GKH |
480 | static DEVICE_ATTR_RW(max_write_same_blocks); |
481 | ||
482 | static struct attribute *sd_disk_attrs[] = { | |
483 | &dev_attr_cache_type.attr, | |
484 | &dev_attr_FUA.attr, | |
485 | &dev_attr_allow_restart.attr, | |
486 | &dev_attr_manage_start_stop.attr, | |
487 | &dev_attr_protection_type.attr, | |
488 | &dev_attr_protection_mode.attr, | |
489 | &dev_attr_app_tag_own.attr, | |
490 | &dev_attr_thin_provisioning.attr, | |
491 | &dev_attr_provisioning_mode.attr, | |
492 | &dev_attr_max_write_same_blocks.attr, | |
493 | &dev_attr_max_medium_access_timeouts.attr, | |
494 | NULL, | |
6bdaa1f1 | 495 | }; |
e1ea2351 | 496 | ATTRIBUTE_GROUPS(sd_disk); |
6bdaa1f1 JB |
497 | |
498 | static struct class sd_disk_class = { | |
499 | .name = "scsi_disk", | |
500 | .owner = THIS_MODULE, | |
ee959b00 | 501 | .dev_release = scsi_disk_release, |
e1ea2351 | 502 | .dev_groups = sd_disk_groups, |
6bdaa1f1 | 503 | }; |
1da177e4 | 504 | |
691e3d31 | 505 | static const struct dev_pm_ops sd_pm_ops = { |
95897910 | 506 | .suspend = sd_suspend_system, |
691e3d31 | 507 | .resume = sd_resume, |
95897910 | 508 | .poweroff = sd_suspend_system, |
691e3d31 | 509 | .restore = sd_resume, |
95897910 | 510 | .runtime_suspend = sd_suspend_runtime, |
691e3d31 AL |
511 | .runtime_resume = sd_resume, |
512 | }; | |
513 | ||
1da177e4 | 514 | static struct scsi_driver sd_template = { |
1da177e4 LT |
515 | .gendrv = { |
516 | .name = "sd", | |
3af6b352 | 517 | .owner = THIS_MODULE, |
1da177e4 LT |
518 | .probe = sd_probe, |
519 | .remove = sd_remove, | |
520 | .shutdown = sd_shutdown, | |
691e3d31 | 521 | .pm = &sd_pm_ops, |
1da177e4 LT |
522 | }, |
523 | .rescan = sd_rescan, | |
a1b73fc1 CH |
524 | .init_command = sd_init_command, |
525 | .uninit_command = sd_uninit_command, | |
7b3d9545 | 526 | .done = sd_done, |
18a4d0a2 | 527 | .eh_action = sd_eh_action, |
1da177e4 LT |
528 | }; |
529 | ||
0761df9c HR |
530 | /* |
531 | * Dummy kobj_map->probe function. | |
532 | * The default ->probe function will call modprobe, which is | |
533 | * pointless as this module is already loaded. | |
534 | */ | |
535 | static struct kobject *sd_default_probe(dev_t devt, int *partno, void *data) | |
536 | { | |
537 | return NULL; | |
538 | } | |
539 | ||
1da177e4 LT |
540 | /* |
541 | * Device no to disk mapping: | |
542 | * | |
543 | * major disc2 disc p1 | |
544 | * |............|.............|....|....| <- dev_t | |
545 | * 31 20 19 8 7 4 3 0 | |
546 | * | |
547 | * Inside a major, we have 16k disks, however mapped non- | |
548 | * contiguously. The first 16 disks are for major0, the next | |
549 | * ones with major1, ... Disk 256 is for major0 again, disk 272 | |
550 | * for major1, ... | |
551 | * As we stay compatible with our numbering scheme, we can reuse | |
552 | * the well-know SCSI majors 8, 65--71, 136--143. | |
553 | */ | |
554 | static int sd_major(int major_idx) | |
555 | { | |
556 | switch (major_idx) { | |
557 | case 0: | |
558 | return SCSI_DISK0_MAJOR; | |
559 | case 1 ... 7: | |
560 | return SCSI_DISK1_MAJOR + major_idx - 1; | |
561 | case 8 ... 15: | |
562 | return SCSI_DISK8_MAJOR + major_idx - 8; | |
563 | default: | |
564 | BUG(); | |
565 | return 0; /* shut up gcc */ | |
566 | } | |
567 | } | |
568 | ||
3d9a1f53 | 569 | static struct scsi_disk *scsi_disk_get(struct gendisk *disk) |
1da177e4 LT |
570 | { |
571 | struct scsi_disk *sdkp = NULL; | |
572 | ||
3d9a1f53 CH |
573 | mutex_lock(&sd_ref_mutex); |
574 | ||
39b7f1e2 AS |
575 | if (disk->private_data) { |
576 | sdkp = scsi_disk(disk); | |
577 | if (scsi_device_get(sdkp->device) == 0) | |
ee959b00 | 578 | get_device(&sdkp->dev); |
39b7f1e2 AS |
579 | else |
580 | sdkp = NULL; | |
581 | } | |
0b950672 | 582 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
583 | return sdkp; |
584 | } | |
585 | ||
586 | static void scsi_disk_put(struct scsi_disk *sdkp) | |
587 | { | |
588 | struct scsi_device *sdev = sdkp->device; | |
589 | ||
0b950672 | 590 | mutex_lock(&sd_ref_mutex); |
ee959b00 | 591 | put_device(&sdkp->dev); |
1da177e4 | 592 | scsi_device_put(sdev); |
0b950672 | 593 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
594 | } |
595 | ||
c611529e MP |
596 | static unsigned char sd_setup_protect_cmnd(struct scsi_cmnd *scmd, |
597 | unsigned int dix, unsigned int dif) | |
35e1a5d9 | 598 | { |
c611529e MP |
599 | struct bio *bio = scmd->request->bio; |
600 | unsigned int prot_op = sd_prot_op(rq_data_dir(scmd->request), dix, dif); | |
601 | unsigned int protect = 0; | |
602 | ||
603 | if (dix) { /* DIX Type 0, 1, 2, 3 */ | |
604 | if (bio_integrity_flagged(bio, BIP_IP_CHECKSUM)) | |
605 | scmd->prot_flags |= SCSI_PROT_IP_CHECKSUM; | |
606 | ||
607 | if (bio_integrity_flagged(bio, BIP_CTRL_NOCHECK) == false) | |
608 | scmd->prot_flags |= SCSI_PROT_GUARD_CHECK; | |
609 | } | |
610 | ||
611 | if (dif != SD_DIF_TYPE3_PROTECTION) { /* DIX/DIF Type 0, 1, 2 */ | |
612 | scmd->prot_flags |= SCSI_PROT_REF_INCREMENT; | |
613 | ||
614 | if (bio_integrity_flagged(bio, BIP_CTRL_NOCHECK) == false) | |
615 | scmd->prot_flags |= SCSI_PROT_REF_CHECK; | |
616 | } | |
617 | ||
618 | if (dif) { /* DIX/DIF Type 1, 2, 3 */ | |
619 | scmd->prot_flags |= SCSI_PROT_TRANSFER_PI; | |
620 | ||
621 | if (bio_integrity_flagged(bio, BIP_DISK_NOCHECK)) | |
622 | protect = 3 << 5; /* Disable target PI checking */ | |
623 | else | |
624 | protect = 1 << 5; /* Enable target PI checking */ | |
35e1a5d9 MP |
625 | } |
626 | ||
627 | scsi_set_prot_op(scmd, prot_op); | |
628 | scsi_set_prot_type(scmd, dif); | |
c611529e MP |
629 | scmd->prot_flags &= sd_prot_flag_mask(prot_op); |
630 | ||
631 | return protect; | |
35e1a5d9 MP |
632 | } |
633 | ||
c98a0eb0 MP |
634 | static void sd_config_discard(struct scsi_disk *sdkp, unsigned int mode) |
635 | { | |
636 | struct request_queue *q = sdkp->disk->queue; | |
637 | unsigned int logical_block_size = sdkp->device->sector_size; | |
638 | unsigned int max_blocks = 0; | |
639 | ||
7985090a | 640 | q->limits.discard_zeroes_data = 0; |
39773722 MP |
641 | |
642 | /* | |
643 | * When LBPRZ is reported, discard alignment and granularity | |
644 | * must be fixed to the logical block size. Otherwise the block | |
645 | * layer will drop misaligned portions of the request which can | |
646 | * lead to data corruption. If LBPRZ is not set, we honor the | |
647 | * device preference. | |
648 | */ | |
649 | if (sdkp->lbprz) { | |
650 | q->limits.discard_alignment = 0; | |
6540a65d | 651 | q->limits.discard_granularity = logical_block_size; |
39773722 MP |
652 | } else { |
653 | q->limits.discard_alignment = sdkp->unmap_alignment * | |
654 | logical_block_size; | |
655 | q->limits.discard_granularity = | |
656 | max(sdkp->physical_block_size, | |
657 | sdkp->unmap_granularity * logical_block_size); | |
658 | } | |
c98a0eb0 | 659 | |
89730393 MP |
660 | sdkp->provisioning_mode = mode; |
661 | ||
c98a0eb0 MP |
662 | switch (mode) { |
663 | ||
664 | case SD_LBP_DISABLE: | |
2bb4cd5c | 665 | blk_queue_max_discard_sectors(q, 0); |
c98a0eb0 MP |
666 | queue_flag_clear_unlocked(QUEUE_FLAG_DISCARD, q); |
667 | return; | |
668 | ||
669 | case SD_LBP_UNMAP: | |
5db44863 MP |
670 | max_blocks = min_not_zero(sdkp->max_unmap_blocks, |
671 | (u32)SD_MAX_WS16_BLOCKS); | |
c98a0eb0 MP |
672 | break; |
673 | ||
674 | case SD_LBP_WS16: | |
5db44863 MP |
675 | max_blocks = min_not_zero(sdkp->max_ws_blocks, |
676 | (u32)SD_MAX_WS16_BLOCKS); | |
7985090a | 677 | q->limits.discard_zeroes_data = sdkp->lbprz; |
c98a0eb0 MP |
678 | break; |
679 | ||
680 | case SD_LBP_WS10: | |
5db44863 MP |
681 | max_blocks = min_not_zero(sdkp->max_ws_blocks, |
682 | (u32)SD_MAX_WS10_BLOCKS); | |
7985090a | 683 | q->limits.discard_zeroes_data = sdkp->lbprz; |
c98a0eb0 MP |
684 | break; |
685 | ||
686 | case SD_LBP_ZERO: | |
5db44863 MP |
687 | max_blocks = min_not_zero(sdkp->max_ws_blocks, |
688 | (u32)SD_MAX_WS10_BLOCKS); | |
c98a0eb0 MP |
689 | q->limits.discard_zeroes_data = 1; |
690 | break; | |
691 | } | |
692 | ||
2bb4cd5c | 693 | blk_queue_max_discard_sectors(q, max_blocks * (logical_block_size >> 9)); |
c98a0eb0 | 694 | queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, q); |
c98a0eb0 MP |
695 | } |
696 | ||
e339c1a7 | 697 | /** |
26e85fcd | 698 | * sd_setup_discard_cmnd - unmap blocks on thinly provisioned device |
66ac0280 | 699 | * @sdp: scsi device to operate one |
e339c1a7 MP |
700 | * @rq: Request to prepare |
701 | * | |
702 | * Will issue either UNMAP or WRITE SAME(16) depending on preference | |
703 | * indicated by target device. | |
704 | **/ | |
6a7b4398 | 705 | static int sd_setup_discard_cmnd(struct scsi_cmnd *cmd) |
e339c1a7 | 706 | { |
6a7b4398 CH |
707 | struct request *rq = cmd->request; |
708 | struct scsi_device *sdp = cmd->device; | |
e339c1a7 | 709 | struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); |
26e85fcd MP |
710 | sector_t sector = blk_rq_pos(rq); |
711 | unsigned int nr_sectors = blk_rq_sectors(rq); | |
712 | unsigned int nr_bytes = blk_rq_bytes(rq); | |
66ac0280 | 713 | unsigned int len; |
f1126e95 | 714 | int ret; |
c98a0eb0 | 715 | char *buf; |
66ac0280 | 716 | struct page *page; |
e339c1a7 | 717 | |
26e85fcd MP |
718 | sector >>= ilog2(sdp->sector_size) - 9; |
719 | nr_sectors >>= ilog2(sdp->sector_size) - 9; | |
e339c1a7 | 720 | |
66ac0280 CH |
721 | page = alloc_page(GFP_ATOMIC | __GFP_ZERO); |
722 | if (!page) | |
723 | return BLKPREP_DEFER; | |
724 | ||
c98a0eb0 MP |
725 | switch (sdkp->provisioning_mode) { |
726 | case SD_LBP_UNMAP: | |
727 | buf = page_address(page); | |
e339c1a7 | 728 | |
6a7b4398 CH |
729 | cmd->cmd_len = 10; |
730 | cmd->cmnd[0] = UNMAP; | |
731 | cmd->cmnd[8] = 24; | |
e339c1a7 MP |
732 | |
733 | put_unaligned_be16(6 + 16, &buf[0]); | |
734 | put_unaligned_be16(16, &buf[2]); | |
735 | put_unaligned_be64(sector, &buf[8]); | |
66ac0280 | 736 | put_unaligned_be32(nr_sectors, &buf[16]); |
e339c1a7 | 737 | |
66ac0280 | 738 | len = 24; |
c98a0eb0 MP |
739 | break; |
740 | ||
741 | case SD_LBP_WS16: | |
6a7b4398 CH |
742 | cmd->cmd_len = 16; |
743 | cmd->cmnd[0] = WRITE_SAME_16; | |
744 | cmd->cmnd[1] = 0x8; /* UNMAP */ | |
745 | put_unaligned_be64(sector, &cmd->cmnd[2]); | |
746 | put_unaligned_be32(nr_sectors, &cmd->cmnd[10]); | |
66ac0280 CH |
747 | |
748 | len = sdkp->device->sector_size; | |
c98a0eb0 MP |
749 | break; |
750 | ||
751 | case SD_LBP_WS10: | |
752 | case SD_LBP_ZERO: | |
6a7b4398 CH |
753 | cmd->cmd_len = 10; |
754 | cmd->cmnd[0] = WRITE_SAME; | |
c98a0eb0 | 755 | if (sdkp->provisioning_mode == SD_LBP_WS10) |
6a7b4398 CH |
756 | cmd->cmnd[1] = 0x8; /* UNMAP */ |
757 | put_unaligned_be32(sector, &cmd->cmnd[2]); | |
758 | put_unaligned_be16(nr_sectors, &cmd->cmnd[7]); | |
c98a0eb0 MP |
759 | |
760 | len = sdkp->device->sector_size; | |
761 | break; | |
762 | ||
763 | default: | |
0fb5b1fb | 764 | ret = BLKPREP_INVALID; |
c98a0eb0 | 765 | goto out; |
e339c1a7 MP |
766 | } |
767 | ||
dc4a9307 | 768 | rq->completion_data = page; |
6a7b4398 CH |
769 | rq->timeout = SD_TIMEOUT; |
770 | ||
771 | cmd->transfersize = len; | |
e4200f8e | 772 | cmd->allowed = SD_MAX_RETRIES; |
6a7b4398 CH |
773 | |
774 | /* | |
775 | * Initially __data_len is set to the amount of data that needs to be | |
776 | * transferred to the target. This amount depends on whether WRITE SAME | |
777 | * or UNMAP is being used. After the scatterlist has been mapped by | |
778 | * scsi_init_io() we set __data_len to the size of the area to be | |
779 | * discarded on disk. This allows us to report completion on the full | |
780 | * amount of blocks described by the request. | |
781 | */ | |
66ac0280 | 782 | blk_add_request_payload(rq, page, len); |
3c356bde | 783 | ret = scsi_init_io(cmd); |
26e85fcd | 784 | rq->__data_len = nr_bytes; |
c98a0eb0 MP |
785 | |
786 | out: | |
b4f42e28 | 787 | if (ret != BLKPREP_OK) |
610a6349 | 788 | __free_page(page); |
f1126e95 FT |
789 | return ret; |
790 | } | |
791 | ||
5db44863 MP |
792 | static void sd_config_write_same(struct scsi_disk *sdkp) |
793 | { | |
794 | struct request_queue *q = sdkp->disk->queue; | |
795 | unsigned int logical_block_size = sdkp->device->sector_size; | |
5db44863 MP |
796 | |
797 | if (sdkp->device->no_write_same) { | |
798 | sdkp->max_ws_blocks = 0; | |
799 | goto out; | |
800 | } | |
801 | ||
802 | /* Some devices can not handle block counts above 0xffff despite | |
803 | * supporting WRITE SAME(16). Consequently we default to 64k | |
804 | * blocks per I/O unless the device explicitly advertises a | |
805 | * bigger limit. | |
806 | */ | |
66c28f97 MP |
807 | if (sdkp->max_ws_blocks > SD_MAX_WS10_BLOCKS) |
808 | sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks, | |
809 | (u32)SD_MAX_WS16_BLOCKS); | |
810 | else if (sdkp->ws16 || sdkp->ws10 || sdkp->device->no_report_opcodes) | |
811 | sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks, | |
812 | (u32)SD_MAX_WS10_BLOCKS); | |
813 | else { | |
814 | sdkp->device->no_write_same = 1; | |
815 | sdkp->max_ws_blocks = 0; | |
816 | } | |
5db44863 MP |
817 | |
818 | out: | |
66c28f97 MP |
819 | blk_queue_max_write_same_sectors(q, sdkp->max_ws_blocks * |
820 | (logical_block_size >> 9)); | |
5db44863 MP |
821 | } |
822 | ||
823 | /** | |
824 | * sd_setup_write_same_cmnd - write the same data to multiple blocks | |
59b1134c | 825 | * @cmd: command to prepare |
5db44863 MP |
826 | * |
827 | * Will issue either WRITE SAME(10) or WRITE SAME(16) depending on | |
828 | * preference indicated by target device. | |
829 | **/ | |
59b1134c | 830 | static int sd_setup_write_same_cmnd(struct scsi_cmnd *cmd) |
5db44863 | 831 | { |
59b1134c CH |
832 | struct request *rq = cmd->request; |
833 | struct scsi_device *sdp = cmd->device; | |
5db44863 MP |
834 | struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); |
835 | struct bio *bio = rq->bio; | |
836 | sector_t sector = blk_rq_pos(rq); | |
837 | unsigned int nr_sectors = blk_rq_sectors(rq); | |
838 | unsigned int nr_bytes = blk_rq_bytes(rq); | |
839 | int ret; | |
840 | ||
841 | if (sdkp->device->no_write_same) | |
0fb5b1fb | 842 | return BLKPREP_INVALID; |
5db44863 | 843 | |
a4ad39b1 | 844 | BUG_ON(bio_offset(bio) || bio_iovec(bio).bv_len != sdp->sector_size); |
5db44863 MP |
845 | |
846 | sector >>= ilog2(sdp->sector_size) - 9; | |
847 | nr_sectors >>= ilog2(sdp->sector_size) - 9; | |
848 | ||
5db44863 | 849 | rq->timeout = SD_WRITE_SAME_TIMEOUT; |
5db44863 MP |
850 | |
851 | if (sdkp->ws16 || sector > 0xffffffff || nr_sectors > 0xffff) { | |
59b1134c CH |
852 | cmd->cmd_len = 16; |
853 | cmd->cmnd[0] = WRITE_SAME_16; | |
854 | put_unaligned_be64(sector, &cmd->cmnd[2]); | |
855 | put_unaligned_be32(nr_sectors, &cmd->cmnd[10]); | |
5db44863 | 856 | } else { |
59b1134c CH |
857 | cmd->cmd_len = 10; |
858 | cmd->cmnd[0] = WRITE_SAME; | |
859 | put_unaligned_be32(sector, &cmd->cmnd[2]); | |
860 | put_unaligned_be16(nr_sectors, &cmd->cmnd[7]); | |
5db44863 MP |
861 | } |
862 | ||
59b1134c | 863 | cmd->transfersize = sdp->sector_size; |
a25ee548 | 864 | cmd->allowed = SD_MAX_RETRIES; |
5db44863 | 865 | |
59b1134c CH |
866 | /* |
867 | * For WRITE_SAME the data transferred in the DATA IN buffer is | |
868 | * different from the amount of data actually written to the target. | |
869 | * | |
870 | * We set up __data_len to the amount of data transferred from the | |
871 | * DATA IN buffer so that blk_rq_map_sg set up the proper S/G list | |
872 | * to transfer a single sector of data first, but then reset it to | |
873 | * the amount of data to be written right after so that the I/O path | |
874 | * knows how much to actually write. | |
875 | */ | |
876 | rq->__data_len = sdp->sector_size; | |
3c356bde | 877 | ret = scsi_init_io(cmd); |
59b1134c | 878 | rq->__data_len = nr_bytes; |
5db44863 MP |
879 | return ret; |
880 | } | |
881 | ||
a118c6c1 | 882 | static int sd_setup_flush_cmnd(struct scsi_cmnd *cmd) |
90467c29 | 883 | { |
a118c6c1 CH |
884 | struct request *rq = cmd->request; |
885 | ||
886 | /* flush requests don't perform I/O, zero the S/G table */ | |
887 | memset(&cmd->sdb, 0, sizeof(cmd->sdb)); | |
90467c29 | 888 | |
a118c6c1 CH |
889 | cmd->cmnd[0] = SYNCHRONIZE_CACHE; |
890 | cmd->cmd_len = 10; | |
891 | cmd->transfersize = 0; | |
892 | cmd->allowed = SD_MAX_RETRIES; | |
893 | ||
26b9fd8b | 894 | rq->timeout = rq->q->rq_timeout * SD_FLUSH_TIMEOUT_MULTIPLIER; |
a118c6c1 | 895 | return BLKPREP_OK; |
90467c29 FT |
896 | } |
897 | ||
87949eee | 898 | static int sd_setup_read_write_cmnd(struct scsi_cmnd *SCpnt) |
1da177e4 | 899 | { |
a1b73fc1 CH |
900 | struct request *rq = SCpnt->request; |
901 | struct scsi_device *sdp = SCpnt->device; | |
776b23a0 | 902 | struct gendisk *disk = rq->rq_disk; |
af55ff67 | 903 | struct scsi_disk *sdkp; |
83096ebf | 904 | sector_t block = blk_rq_pos(rq); |
18351070 | 905 | sector_t threshold; |
83096ebf | 906 | unsigned int this_count = blk_rq_sectors(rq); |
c611529e MP |
907 | unsigned int dif, dix; |
908 | int ret; | |
4e7392ec | 909 | unsigned char protect; |
7f9a6bc4 | 910 | |
3c356bde | 911 | ret = scsi_init_io(SCpnt); |
7f9a6bc4 JB |
912 | if (ret != BLKPREP_OK) |
913 | goto out; | |
914 | SCpnt = rq->special; | |
af55ff67 | 915 | sdkp = scsi_disk(disk); |
7f9a6bc4 JB |
916 | |
917 | /* from here on until we're complete, any goto out | |
918 | * is used for a killable error condition */ | |
919 | ret = BLKPREP_KILL; | |
1da177e4 | 920 | |
a1b73fc1 CH |
921 | SCSI_LOG_HLQUEUE(1, |
922 | scmd_printk(KERN_INFO, SCpnt, | |
923 | "%s: block=%llu, count=%d\n", | |
924 | __func__, (unsigned long long)block, this_count)); | |
1da177e4 LT |
925 | |
926 | if (!sdp || !scsi_device_online(sdp) || | |
83096ebf | 927 | block + blk_rq_sectors(rq) > get_capacity(disk)) { |
fa0d34be | 928 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
83096ebf TH |
929 | "Finishing %u sectors\n", |
930 | blk_rq_sectors(rq))); | |
fa0d34be MP |
931 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
932 | "Retry with 0x%p\n", SCpnt)); | |
7f9a6bc4 | 933 | goto out; |
1da177e4 LT |
934 | } |
935 | ||
936 | if (sdp->changed) { | |
937 | /* | |
938 | * quietly refuse to do anything to a changed disc until | |
939 | * the changed bit has been reset | |
940 | */ | |
3ff5588d | 941 | /* printk("SCSI disk has been changed or is not present. Prohibiting further I/O.\n"); */ |
7f9a6bc4 | 942 | goto out; |
1da177e4 | 943 | } |
7f9a6bc4 | 944 | |
a0899d4d | 945 | /* |
18351070 LT |
946 | * Some SD card readers can't handle multi-sector accesses which touch |
947 | * the last one or two hardware sectors. Split accesses as needed. | |
a0899d4d | 948 | */ |
18351070 LT |
949 | threshold = get_capacity(disk) - SD_LAST_BUGGY_SECTORS * |
950 | (sdp->sector_size / 512); | |
951 | ||
952 | if (unlikely(sdp->last_sector_bug && block + this_count > threshold)) { | |
953 | if (block < threshold) { | |
954 | /* Access up to the threshold but not beyond */ | |
955 | this_count = threshold - block; | |
956 | } else { | |
957 | /* Access only a single hardware sector */ | |
958 | this_count = sdp->sector_size / 512; | |
959 | } | |
960 | } | |
a0899d4d | 961 | |
fa0d34be MP |
962 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, "block=%llu\n", |
963 | (unsigned long long)block)); | |
1da177e4 LT |
964 | |
965 | /* | |
966 | * If we have a 1K hardware sectorsize, prevent access to single | |
967 | * 512 byte sectors. In theory we could handle this - in fact | |
968 | * the scsi cdrom driver must be able to handle this because | |
969 | * we typically use 1K blocksizes, and cdroms typically have | |
970 | * 2K hardware sectorsizes. Of course, things are simpler | |
971 | * with the cdrom, since it is read-only. For performance | |
972 | * reasons, the filesystems should be able to handle this | |
973 | * and not force the scsi disk driver to use bounce buffers | |
974 | * for this. | |
975 | */ | |
976 | if (sdp->sector_size == 1024) { | |
83096ebf | 977 | if ((block & 1) || (blk_rq_sectors(rq) & 1)) { |
e73aec82 MP |
978 | scmd_printk(KERN_ERR, SCpnt, |
979 | "Bad block number requested\n"); | |
7f9a6bc4 | 980 | goto out; |
1da177e4 LT |
981 | } else { |
982 | block = block >> 1; | |
983 | this_count = this_count >> 1; | |
984 | } | |
985 | } | |
986 | if (sdp->sector_size == 2048) { | |
83096ebf | 987 | if ((block & 3) || (blk_rq_sectors(rq) & 3)) { |
e73aec82 MP |
988 | scmd_printk(KERN_ERR, SCpnt, |
989 | "Bad block number requested\n"); | |
7f9a6bc4 | 990 | goto out; |
1da177e4 LT |
991 | } else { |
992 | block = block >> 2; | |
993 | this_count = this_count >> 2; | |
994 | } | |
995 | } | |
996 | if (sdp->sector_size == 4096) { | |
83096ebf | 997 | if ((block & 7) || (blk_rq_sectors(rq) & 7)) { |
e73aec82 MP |
998 | scmd_printk(KERN_ERR, SCpnt, |
999 | "Bad block number requested\n"); | |
7f9a6bc4 | 1000 | goto out; |
1da177e4 LT |
1001 | } else { |
1002 | block = block >> 3; | |
1003 | this_count = this_count >> 3; | |
1004 | } | |
1005 | } | |
1006 | if (rq_data_dir(rq) == WRITE) { | |
1da177e4 | 1007 | SCpnt->cmnd[0] = WRITE_6; |
af55ff67 | 1008 | |
8c579ab6 | 1009 | if (blk_integrity_rq(rq)) |
c611529e | 1010 | sd_dif_prepare(SCpnt); |
af55ff67 | 1011 | |
1da177e4 LT |
1012 | } else if (rq_data_dir(rq) == READ) { |
1013 | SCpnt->cmnd[0] = READ_6; | |
1da177e4 | 1014 | } else { |
5953316d | 1015 | scmd_printk(KERN_ERR, SCpnt, "Unknown command %llx\n", (unsigned long long) rq->cmd_flags); |
7f9a6bc4 | 1016 | goto out; |
1da177e4 LT |
1017 | } |
1018 | ||
fa0d34be | 1019 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
83096ebf | 1020 | "%s %d/%u 512 byte blocks.\n", |
fa0d34be MP |
1021 | (rq_data_dir(rq) == WRITE) ? |
1022 | "writing" : "reading", this_count, | |
83096ebf | 1023 | blk_rq_sectors(rq))); |
1da177e4 | 1024 | |
c611529e MP |
1025 | dix = scsi_prot_sg_count(SCpnt); |
1026 | dif = scsi_host_dif_capable(SCpnt->device->host, sdkp->protection_type); | |
1027 | ||
1028 | if (dif || dix) | |
1029 | protect = sd_setup_protect_cmnd(SCpnt, dix, dif); | |
af55ff67 | 1030 | else |
4e7392ec MP |
1031 | protect = 0; |
1032 | ||
c611529e | 1033 | if (protect && sdkp->protection_type == SD_DIF_TYPE2_PROTECTION) { |
4e7392ec MP |
1034 | SCpnt->cmnd = mempool_alloc(sd_cdb_pool, GFP_ATOMIC); |
1035 | ||
1036 | if (unlikely(SCpnt->cmnd == NULL)) { | |
1037 | ret = BLKPREP_DEFER; | |
1038 | goto out; | |
1039 | } | |
af55ff67 | 1040 | |
4e7392ec MP |
1041 | SCpnt->cmd_len = SD_EXT_CDB_SIZE; |
1042 | memset(SCpnt->cmnd, 0, SCpnt->cmd_len); | |
1043 | SCpnt->cmnd[0] = VARIABLE_LENGTH_CMD; | |
1044 | SCpnt->cmnd[7] = 0x18; | |
1045 | SCpnt->cmnd[9] = (rq_data_dir(rq) == READ) ? READ_32 : WRITE_32; | |
33659ebb | 1046 | SCpnt->cmnd[10] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
4e7392ec MP |
1047 | |
1048 | /* LBA */ | |
1049 | SCpnt->cmnd[12] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0; | |
1050 | SCpnt->cmnd[13] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0; | |
1051 | SCpnt->cmnd[14] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0; | |
1052 | SCpnt->cmnd[15] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0; | |
1053 | SCpnt->cmnd[16] = (unsigned char) (block >> 24) & 0xff; | |
1054 | SCpnt->cmnd[17] = (unsigned char) (block >> 16) & 0xff; | |
1055 | SCpnt->cmnd[18] = (unsigned char) (block >> 8) & 0xff; | |
1056 | SCpnt->cmnd[19] = (unsigned char) block & 0xff; | |
1057 | ||
1058 | /* Expected Indirect LBA */ | |
1059 | SCpnt->cmnd[20] = (unsigned char) (block >> 24) & 0xff; | |
1060 | SCpnt->cmnd[21] = (unsigned char) (block >> 16) & 0xff; | |
1061 | SCpnt->cmnd[22] = (unsigned char) (block >> 8) & 0xff; | |
1062 | SCpnt->cmnd[23] = (unsigned char) block & 0xff; | |
1063 | ||
1064 | /* Transfer length */ | |
1065 | SCpnt->cmnd[28] = (unsigned char) (this_count >> 24) & 0xff; | |
1066 | SCpnt->cmnd[29] = (unsigned char) (this_count >> 16) & 0xff; | |
1067 | SCpnt->cmnd[30] = (unsigned char) (this_count >> 8) & 0xff; | |
1068 | SCpnt->cmnd[31] = (unsigned char) this_count & 0xff; | |
e430cbc8 | 1069 | } else if (sdp->use_16_for_rw || (this_count > 0xffff)) { |
1da177e4 | 1070 | SCpnt->cmnd[0] += READ_16 - READ_6; |
33659ebb | 1071 | SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
1da177e4 LT |
1072 | SCpnt->cmnd[2] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0; |
1073 | SCpnt->cmnd[3] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0; | |
1074 | SCpnt->cmnd[4] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0; | |
1075 | SCpnt->cmnd[5] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0; | |
1076 | SCpnt->cmnd[6] = (unsigned char) (block >> 24) & 0xff; | |
1077 | SCpnt->cmnd[7] = (unsigned char) (block >> 16) & 0xff; | |
1078 | SCpnt->cmnd[8] = (unsigned char) (block >> 8) & 0xff; | |
1079 | SCpnt->cmnd[9] = (unsigned char) block & 0xff; | |
1080 | SCpnt->cmnd[10] = (unsigned char) (this_count >> 24) & 0xff; | |
1081 | SCpnt->cmnd[11] = (unsigned char) (this_count >> 16) & 0xff; | |
1082 | SCpnt->cmnd[12] = (unsigned char) (this_count >> 8) & 0xff; | |
1083 | SCpnt->cmnd[13] = (unsigned char) this_count & 0xff; | |
1084 | SCpnt->cmnd[14] = SCpnt->cmnd[15] = 0; | |
1085 | } else if ((this_count > 0xff) || (block > 0x1fffff) || | |
af55ff67 | 1086 | scsi_device_protection(SCpnt->device) || |
1da177e4 | 1087 | SCpnt->device->use_10_for_rw) { |
1da177e4 | 1088 | SCpnt->cmnd[0] += READ_10 - READ_6; |
33659ebb | 1089 | SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
1da177e4 LT |
1090 | SCpnt->cmnd[2] = (unsigned char) (block >> 24) & 0xff; |
1091 | SCpnt->cmnd[3] = (unsigned char) (block >> 16) & 0xff; | |
1092 | SCpnt->cmnd[4] = (unsigned char) (block >> 8) & 0xff; | |
1093 | SCpnt->cmnd[5] = (unsigned char) block & 0xff; | |
1094 | SCpnt->cmnd[6] = SCpnt->cmnd[9] = 0; | |
1095 | SCpnt->cmnd[7] = (unsigned char) (this_count >> 8) & 0xff; | |
1096 | SCpnt->cmnd[8] = (unsigned char) this_count & 0xff; | |
1097 | } else { | |
33659ebb | 1098 | if (unlikely(rq->cmd_flags & REQ_FUA)) { |
007365ad TH |
1099 | /* |
1100 | * This happens only if this drive failed | |
1101 | * 10byte rw command with ILLEGAL_REQUEST | |
1102 | * during operation and thus turned off | |
1103 | * use_10_for_rw. | |
1104 | */ | |
e73aec82 MP |
1105 | scmd_printk(KERN_ERR, SCpnt, |
1106 | "FUA write on READ/WRITE(6) drive\n"); | |
7f9a6bc4 | 1107 | goto out; |
007365ad TH |
1108 | } |
1109 | ||
1da177e4 LT |
1110 | SCpnt->cmnd[1] |= (unsigned char) ((block >> 16) & 0x1f); |
1111 | SCpnt->cmnd[2] = (unsigned char) ((block >> 8) & 0xff); | |
1112 | SCpnt->cmnd[3] = (unsigned char) block & 0xff; | |
1113 | SCpnt->cmnd[4] = (unsigned char) this_count; | |
1114 | SCpnt->cmnd[5] = 0; | |
1115 | } | |
30b0c37b | 1116 | SCpnt->sdb.length = this_count * sdp->sector_size; |
1da177e4 LT |
1117 | |
1118 | /* | |
1119 | * We shouldn't disconnect in the middle of a sector, so with a dumb | |
1120 | * host adapter, it's safe to assume that we can at least transfer | |
1121 | * this many bytes between each connect / disconnect. | |
1122 | */ | |
1123 | SCpnt->transfersize = sdp->sector_size; | |
1124 | SCpnt->underflow = this_count << 9; | |
1125 | SCpnt->allowed = SD_MAX_RETRIES; | |
1da177e4 | 1126 | |
1da177e4 LT |
1127 | /* |
1128 | * This indicates that the command is ready from our end to be | |
1129 | * queued. | |
1130 | */ | |
7f9a6bc4 JB |
1131 | ret = BLKPREP_OK; |
1132 | out: | |
a1b73fc1 | 1133 | return ret; |
1da177e4 LT |
1134 | } |
1135 | ||
87949eee CH |
1136 | static int sd_init_command(struct scsi_cmnd *cmd) |
1137 | { | |
1138 | struct request *rq = cmd->request; | |
1139 | ||
1140 | if (rq->cmd_flags & REQ_DISCARD) | |
1141 | return sd_setup_discard_cmnd(cmd); | |
1142 | else if (rq->cmd_flags & REQ_WRITE_SAME) | |
1143 | return sd_setup_write_same_cmnd(cmd); | |
1144 | else if (rq->cmd_flags & REQ_FLUSH) | |
1145 | return sd_setup_flush_cmnd(cmd); | |
1146 | else | |
1147 | return sd_setup_read_write_cmnd(cmd); | |
1148 | } | |
1149 | ||
1150 | static void sd_uninit_command(struct scsi_cmnd *SCpnt) | |
1151 | { | |
1152 | struct request *rq = SCpnt->request; | |
1153 | ||
1154 | if (rq->cmd_flags & REQ_DISCARD) | |
1155 | __free_page(rq->completion_data); | |
1156 | ||
1157 | if (SCpnt->cmnd != rq->cmd) { | |
1158 | mempool_free(SCpnt->cmnd, sd_cdb_pool); | |
1159 | SCpnt->cmnd = NULL; | |
1160 | SCpnt->cmd_len = 0; | |
1161 | } | |
1162 | } | |
1163 | ||
1da177e4 LT |
1164 | /** |
1165 | * sd_open - open a scsi disk device | |
1166 | * @inode: only i_rdev member may be used | |
1167 | * @filp: only f_mode and f_flags may be used | |
1168 | * | |
1169 | * Returns 0 if successful. Returns a negated errno value in case | |
1170 | * of error. | |
1171 | * | |
1172 | * Note: This can be called from a user context (e.g. fsck(1) ) | |
1173 | * or from within the kernel (e.g. as a result of a mount(1) ). | |
1174 | * In the latter case @inode and @filp carry an abridged amount | |
1175 | * of information as noted above. | |
409f3499 AB |
1176 | * |
1177 | * Locking: called with bdev->bd_mutex held. | |
1da177e4 | 1178 | **/ |
0338e291 | 1179 | static int sd_open(struct block_device *bdev, fmode_t mode) |
1da177e4 | 1180 | { |
0338e291 | 1181 | struct scsi_disk *sdkp = scsi_disk_get(bdev->bd_disk); |
1da177e4 LT |
1182 | struct scsi_device *sdev; |
1183 | int retval; | |
1184 | ||
0338e291 | 1185 | if (!sdkp) |
1da177e4 LT |
1186 | return -ENXIO; |
1187 | ||
fa0d34be | 1188 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_open\n")); |
1da177e4 LT |
1189 | |
1190 | sdev = sdkp->device; | |
1191 | ||
1192 | /* | |
1193 | * If the device is in error recovery, wait until it is done. | |
1194 | * If the device is offline, then disallow any access to it. | |
1195 | */ | |
1196 | retval = -ENXIO; | |
1197 | if (!scsi_block_when_processing_errors(sdev)) | |
1198 | goto error_out; | |
1199 | ||
1200 | if (sdev->removable || sdkp->write_prot) | |
0338e291 | 1201 | check_disk_change(bdev); |
1da177e4 LT |
1202 | |
1203 | /* | |
1204 | * If the drive is empty, just let the open fail. | |
1205 | */ | |
1206 | retval = -ENOMEDIUM; | |
0338e291 | 1207 | if (sdev->removable && !sdkp->media_present && !(mode & FMODE_NDELAY)) |
1da177e4 LT |
1208 | goto error_out; |
1209 | ||
1210 | /* | |
1211 | * If the device has the write protect tab set, have the open fail | |
1212 | * if the user expects to be able to write to the thing. | |
1213 | */ | |
1214 | retval = -EROFS; | |
0338e291 | 1215 | if (sdkp->write_prot && (mode & FMODE_WRITE)) |
1da177e4 LT |
1216 | goto error_out; |
1217 | ||
1218 | /* | |
1219 | * It is possible that the disk changing stuff resulted in | |
1220 | * the device being taken offline. If this is the case, | |
1221 | * report this to the user, and don't pretend that the | |
1222 | * open actually succeeded. | |
1223 | */ | |
1224 | retval = -ENXIO; | |
1225 | if (!scsi_device_online(sdev)) | |
1226 | goto error_out; | |
1227 | ||
409f3499 | 1228 | if ((atomic_inc_return(&sdkp->openers) == 1) && sdev->removable) { |
1da177e4 LT |
1229 | if (scsi_block_when_processing_errors(sdev)) |
1230 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT); | |
1231 | } | |
1232 | ||
1233 | return 0; | |
1234 | ||
1235 | error_out: | |
1236 | scsi_disk_put(sdkp); | |
1237 | return retval; | |
1238 | } | |
1239 | ||
1240 | /** | |
1241 | * sd_release - invoked when the (last) close(2) is called on this | |
1242 | * scsi disk. | |
1243 | * @inode: only i_rdev member may be used | |
1244 | * @filp: only f_mode and f_flags may be used | |
1245 | * | |
1246 | * Returns 0. | |
1247 | * | |
1248 | * Note: may block (uninterruptible) if error recovery is underway | |
1249 | * on this disk. | |
409f3499 AB |
1250 | * |
1251 | * Locking: called with bdev->bd_mutex held. | |
1da177e4 | 1252 | **/ |
db2a144b | 1253 | static void sd_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 1254 | { |
1da177e4 LT |
1255 | struct scsi_disk *sdkp = scsi_disk(disk); |
1256 | struct scsi_device *sdev = sdkp->device; | |
1257 | ||
56937f7b | 1258 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_release\n")); |
1da177e4 | 1259 | |
7e443312 | 1260 | if (atomic_dec_return(&sdkp->openers) == 0 && sdev->removable) { |
1da177e4 LT |
1261 | if (scsi_block_when_processing_errors(sdev)) |
1262 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW); | |
1263 | } | |
1264 | ||
1265 | /* | |
1266 | * XXX and what if there are packets in flight and this close() | |
1267 | * XXX is followed by a "rmmod sd_mod"? | |
1268 | */ | |
478a8a05 | 1269 | |
1da177e4 | 1270 | scsi_disk_put(sdkp); |
1da177e4 LT |
1271 | } |
1272 | ||
a885c8c4 | 1273 | static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
1da177e4 LT |
1274 | { |
1275 | struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk); | |
1276 | struct scsi_device *sdp = sdkp->device; | |
1277 | struct Scsi_Host *host = sdp->host; | |
f08bb1e0 | 1278 | sector_t capacity = logical_to_sectors(sdp, sdkp->capacity); |
1da177e4 LT |
1279 | int diskinfo[4]; |
1280 | ||
1281 | /* default to most commonly used values */ | |
f08bb1e0 MP |
1282 | diskinfo[0] = 0x40; /* 1 << 6 */ |
1283 | diskinfo[1] = 0x20; /* 1 << 5 */ | |
1284 | diskinfo[2] = capacity >> 11; | |
1285 | ||
1da177e4 LT |
1286 | /* override with calculated, extended default, or driver values */ |
1287 | if (host->hostt->bios_param) | |
f08bb1e0 | 1288 | host->hostt->bios_param(sdp, bdev, capacity, diskinfo); |
1da177e4 | 1289 | else |
f08bb1e0 | 1290 | scsicam_bios_param(bdev, capacity, diskinfo); |
1da177e4 | 1291 | |
a885c8c4 CH |
1292 | geo->heads = diskinfo[0]; |
1293 | geo->sectors = diskinfo[1]; | |
1294 | geo->cylinders = diskinfo[2]; | |
1da177e4 LT |
1295 | return 0; |
1296 | } | |
1297 | ||
1298 | /** | |
1299 | * sd_ioctl - process an ioctl | |
1300 | * @inode: only i_rdev/i_bdev members may be used | |
1301 | * @filp: only f_mode and f_flags may be used | |
1302 | * @cmd: ioctl command number | |
1303 | * @arg: this is third argument given to ioctl(2) system call. | |
1304 | * Often contains a pointer. | |
1305 | * | |
25985edc | 1306 | * Returns 0 if successful (some ioctls return positive numbers on |
1da177e4 LT |
1307 | * success as well). Returns a negated errno value in case of error. |
1308 | * | |
1309 | * Note: most ioctls are forward onto the block subsystem or further | |
3a4fa0a2 | 1310 | * down in the scsi subsystem. |
1da177e4 | 1311 | **/ |
0338e291 | 1312 | static int sd_ioctl(struct block_device *bdev, fmode_t mode, |
1da177e4 LT |
1313 | unsigned int cmd, unsigned long arg) |
1314 | { | |
1da177e4 | 1315 | struct gendisk *disk = bdev->bd_disk; |
fe2d1851 NN |
1316 | struct scsi_disk *sdkp = scsi_disk(disk); |
1317 | struct scsi_device *sdp = sdkp->device; | |
1da177e4 LT |
1318 | void __user *p = (void __user *)arg; |
1319 | int error; | |
1320 | ||
fe2d1851 NN |
1321 | SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO, sdkp, "sd_ioctl: disk=%s, " |
1322 | "cmd=0x%x\n", disk->disk_name, cmd)); | |
1da177e4 | 1323 | |
0bfc96cb PB |
1324 | error = scsi_verify_blk_ioctl(bdev, cmd); |
1325 | if (error < 0) | |
1326 | return error; | |
1327 | ||
1da177e4 LT |
1328 | /* |
1329 | * If we are in the middle of error recovery, don't let anyone | |
1330 | * else try and use this device. Also, if error recovery fails, it | |
1331 | * may try and take the device offline, in which case all further | |
1332 | * access to the device is prohibited. | |
1333 | */ | |
906d15fb CH |
1334 | error = scsi_ioctl_block_when_processing_errors(sdp, cmd, |
1335 | (mode & FMODE_NDELAY) != 0); | |
1336 | if (error) | |
8a6cfeb6 | 1337 | goto out; |
1da177e4 | 1338 | |
1da177e4 LT |
1339 | /* |
1340 | * Send SCSI addressing ioctls directly to mid level, send other | |
1341 | * ioctls to block level and then onto mid level if they can't be | |
1342 | * resolved. | |
1343 | */ | |
1344 | switch (cmd) { | |
1345 | case SCSI_IOCTL_GET_IDLUN: | |
1346 | case SCSI_IOCTL_GET_BUS_NUMBER: | |
8a6cfeb6 AB |
1347 | error = scsi_ioctl(sdp, cmd, p); |
1348 | break; | |
1da177e4 | 1349 | default: |
577ebb37 | 1350 | error = scsi_cmd_blk_ioctl(bdev, mode, cmd, p); |
1da177e4 | 1351 | if (error != -ENOTTY) |
8a6cfeb6 AB |
1352 | break; |
1353 | error = scsi_ioctl(sdp, cmd, p); | |
1354 | break; | |
1da177e4 | 1355 | } |
8a6cfeb6 | 1356 | out: |
8a6cfeb6 | 1357 | return error; |
1da177e4 LT |
1358 | } |
1359 | ||
1360 | static void set_media_not_present(struct scsi_disk *sdkp) | |
1361 | { | |
2bae0093 TH |
1362 | if (sdkp->media_present) |
1363 | sdkp->device->changed = 1; | |
1364 | ||
1365 | if (sdkp->device->removable) { | |
1366 | sdkp->media_present = 0; | |
1367 | sdkp->capacity = 0; | |
1368 | } | |
1369 | } | |
1370 | ||
1371 | static int media_not_present(struct scsi_disk *sdkp, | |
1372 | struct scsi_sense_hdr *sshdr) | |
1373 | { | |
1374 | if (!scsi_sense_valid(sshdr)) | |
1375 | return 0; | |
1376 | ||
1377 | /* not invoked for commands that could return deferred errors */ | |
1378 | switch (sshdr->sense_key) { | |
1379 | case UNIT_ATTENTION: | |
1380 | case NOT_READY: | |
1381 | /* medium not present */ | |
1382 | if (sshdr->asc == 0x3A) { | |
1383 | set_media_not_present(sdkp); | |
1384 | return 1; | |
1385 | } | |
1386 | } | |
1387 | return 0; | |
1da177e4 LT |
1388 | } |
1389 | ||
1390 | /** | |
2bae0093 TH |
1391 | * sd_check_events - check media events |
1392 | * @disk: kernel device descriptor | |
1393 | * @clearing: disk events currently being cleared | |
1da177e4 | 1394 | * |
2bae0093 | 1395 | * Returns mask of DISK_EVENT_*. |
1da177e4 LT |
1396 | * |
1397 | * Note: this function is invoked from the block subsystem. | |
1398 | **/ | |
2bae0093 | 1399 | static unsigned int sd_check_events(struct gendisk *disk, unsigned int clearing) |
1da177e4 LT |
1400 | { |
1401 | struct scsi_disk *sdkp = scsi_disk(disk); | |
1402 | struct scsi_device *sdp = sdkp->device; | |
001aac25 | 1403 | struct scsi_sense_hdr *sshdr = NULL; |
1da177e4 LT |
1404 | int retval; |
1405 | ||
2bae0093 | 1406 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_check_events\n")); |
1da177e4 LT |
1407 | |
1408 | /* | |
1409 | * If the device is offline, don't send any commands - just pretend as | |
1410 | * if the command failed. If the device ever comes back online, we | |
1411 | * can deal with it then. It is only because of unrecoverable errors | |
1412 | * that we would ever take a device offline in the first place. | |
1413 | */ | |
285e9670 KS |
1414 | if (!scsi_device_online(sdp)) { |
1415 | set_media_not_present(sdkp); | |
285e9670 KS |
1416 | goto out; |
1417 | } | |
1da177e4 LT |
1418 | |
1419 | /* | |
1420 | * Using TEST_UNIT_READY enables differentiation between drive with | |
1421 | * no cartridge loaded - NOT READY, drive with changed cartridge - | |
1422 | * UNIT ATTENTION, or with same cartridge - GOOD STATUS. | |
1423 | * | |
1424 | * Drives that auto spin down. eg iomega jaz 1G, will be started | |
1425 | * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever | |
1426 | * sd_revalidate() is called. | |
1427 | */ | |
1428 | retval = -ENODEV; | |
285e9670 | 1429 | |
001aac25 JB |
1430 | if (scsi_block_when_processing_errors(sdp)) { |
1431 | sshdr = kzalloc(sizeof(*sshdr), GFP_KERNEL); | |
1432 | retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, SD_MAX_RETRIES, | |
1433 | sshdr); | |
1434 | } | |
1da177e4 | 1435 | |
2bae0093 TH |
1436 | /* failed to execute TUR, assume media not present */ |
1437 | if (host_byte(retval)) { | |
285e9670 | 1438 | set_media_not_present(sdkp); |
285e9670 KS |
1439 | goto out; |
1440 | } | |
1da177e4 | 1441 | |
2bae0093 TH |
1442 | if (media_not_present(sdkp, sshdr)) |
1443 | goto out; | |
1444 | ||
1da177e4 LT |
1445 | /* |
1446 | * For removable scsi disk we have to recognise the presence | |
2bae0093 | 1447 | * of a disk in the drive. |
1da177e4 | 1448 | */ |
2bae0093 TH |
1449 | if (!sdkp->media_present) |
1450 | sdp->changed = 1; | |
1da177e4 | 1451 | sdkp->media_present = 1; |
285e9670 | 1452 | out: |
3ff5588d | 1453 | /* |
2bae0093 | 1454 | * sdp->changed is set under the following conditions: |
3ff5588d | 1455 | * |
2bae0093 TH |
1456 | * Medium present state has changed in either direction. |
1457 | * Device has indicated UNIT_ATTENTION. | |
3ff5588d | 1458 | */ |
001aac25 | 1459 | kfree(sshdr); |
2bae0093 TH |
1460 | retval = sdp->changed ? DISK_EVENT_MEDIA_CHANGE : 0; |
1461 | sdp->changed = 0; | |
1da177e4 | 1462 | return retval; |
1da177e4 LT |
1463 | } |
1464 | ||
e73aec82 | 1465 | static int sd_sync_cache(struct scsi_disk *sdkp) |
1da177e4 | 1466 | { |
1da177e4 | 1467 | int retries, res; |
e73aec82 | 1468 | struct scsi_device *sdp = sdkp->device; |
7e660100 JB |
1469 | const int timeout = sdp->request_queue->rq_timeout |
1470 | * SD_FLUSH_TIMEOUT_MULTIPLIER; | |
ea73a9f2 | 1471 | struct scsi_sense_hdr sshdr; |
1da177e4 LT |
1472 | |
1473 | if (!scsi_device_online(sdp)) | |
1474 | return -ENODEV; | |
1475 | ||
1da177e4 LT |
1476 | for (retries = 3; retries > 0; --retries) { |
1477 | unsigned char cmd[10] = { 0 }; | |
1478 | ||
1479 | cmd[0] = SYNCHRONIZE_CACHE; | |
1480 | /* | |
1481 | * Leave the rest of the command zero to indicate | |
1482 | * flush everything. | |
1483 | */ | |
9b21493c | 1484 | res = scsi_execute_req_flags(sdp, cmd, DMA_NONE, NULL, 0, |
7e660100 JB |
1485 | &sshdr, timeout, SD_MAX_RETRIES, |
1486 | NULL, REQ_PM); | |
ea73a9f2 | 1487 | if (res == 0) |
1da177e4 LT |
1488 | break; |
1489 | } | |
1490 | ||
e73aec82 | 1491 | if (res) { |
ef61329d | 1492 | sd_print_result(sdkp, "Synchronize Cache(10) failed", res); |
95897910 | 1493 | |
e73aec82 MP |
1494 | if (driver_byte(res) & DRIVER_SENSE) |
1495 | sd_print_sense_hdr(sdkp, &sshdr); | |
95897910 ON |
1496 | /* we need to evaluate the error return */ |
1497 | if (scsi_sense_valid(&sshdr) && | |
7aae5134 AS |
1498 | (sshdr.asc == 0x3a || /* medium not present */ |
1499 | sshdr.asc == 0x20)) /* invalid command */ | |
95897910 ON |
1500 | /* this is no error here */ |
1501 | return 0; | |
1502 | ||
1503 | switch (host_byte(res)) { | |
1504 | /* ignore errors due to racing a disconnection */ | |
1505 | case DID_BAD_TARGET: | |
1506 | case DID_NO_CONNECT: | |
1507 | return 0; | |
1508 | /* signal the upper layer it might try again */ | |
1509 | case DID_BUS_BUSY: | |
1510 | case DID_IMM_RETRY: | |
1511 | case DID_REQUEUE: | |
1512 | case DID_SOFT_ERROR: | |
1513 | return -EBUSY; | |
1514 | default: | |
1515 | return -EIO; | |
1516 | } | |
1da177e4 | 1517 | } |
3721050a | 1518 | return 0; |
1da177e4 LT |
1519 | } |
1520 | ||
1da177e4 LT |
1521 | static void sd_rescan(struct device *dev) |
1522 | { | |
3d9a1f53 | 1523 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
39b7f1e2 | 1524 | |
3d9a1f53 | 1525 | revalidate_disk(sdkp->disk); |
1da177e4 LT |
1526 | } |
1527 | ||
1528 | ||
1529 | #ifdef CONFIG_COMPAT | |
1530 | /* | |
1531 | * This gets directly called from VFS. When the ioctl | |
1532 | * is not recognized we go back to the other translation paths. | |
1533 | */ | |
0338e291 AV |
1534 | static int sd_compat_ioctl(struct block_device *bdev, fmode_t mode, |
1535 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1536 | { |
0338e291 | 1537 | struct scsi_device *sdev = scsi_disk(bdev->bd_disk)->device; |
21a9d4c9 | 1538 | int error; |
1da177e4 | 1539 | |
21a9d4c9 CH |
1540 | error = scsi_ioctl_block_when_processing_errors(sdev, cmd, |
1541 | (mode & FMODE_NDELAY) != 0); | |
1542 | if (error) | |
1543 | return error; | |
1da177e4 | 1544 | |
1da177e4 LT |
1545 | /* |
1546 | * Let the static ioctl translation table take care of it. | |
1547 | */ | |
21a9d4c9 CH |
1548 | if (!sdev->host->hostt->compat_ioctl) |
1549 | return -ENOIOCTLCMD; | |
1550 | return sdev->host->hostt->compat_ioctl(sdev, cmd, (void __user *)arg); | |
1da177e4 LT |
1551 | } |
1552 | #endif | |
1553 | ||
924d55b0 CH |
1554 | static char sd_pr_type(enum pr_type type) |
1555 | { | |
1556 | switch (type) { | |
1557 | case PR_WRITE_EXCLUSIVE: | |
1558 | return 0x01; | |
1559 | case PR_EXCLUSIVE_ACCESS: | |
1560 | return 0x03; | |
1561 | case PR_WRITE_EXCLUSIVE_REG_ONLY: | |
1562 | return 0x05; | |
1563 | case PR_EXCLUSIVE_ACCESS_REG_ONLY: | |
1564 | return 0x06; | |
1565 | case PR_WRITE_EXCLUSIVE_ALL_REGS: | |
1566 | return 0x07; | |
1567 | case PR_EXCLUSIVE_ACCESS_ALL_REGS: | |
1568 | return 0x08; | |
1569 | default: | |
1570 | return 0; | |
1571 | } | |
1572 | }; | |
1573 | ||
1574 | static int sd_pr_command(struct block_device *bdev, u8 sa, | |
1575 | u64 key, u64 sa_key, u8 type, u8 flags) | |
1576 | { | |
1577 | struct scsi_device *sdev = scsi_disk(bdev->bd_disk)->device; | |
1578 | struct scsi_sense_hdr sshdr; | |
1579 | int result; | |
1580 | u8 cmd[16] = { 0, }; | |
1581 | u8 data[24] = { 0, }; | |
1582 | ||
1583 | cmd[0] = PERSISTENT_RESERVE_OUT; | |
1584 | cmd[1] = sa; | |
1585 | cmd[2] = type; | |
1586 | put_unaligned_be32(sizeof(data), &cmd[5]); | |
1587 | ||
1588 | put_unaligned_be64(key, &data[0]); | |
1589 | put_unaligned_be64(sa_key, &data[8]); | |
1590 | data[20] = flags; | |
1591 | ||
1592 | result = scsi_execute_req(sdev, cmd, DMA_TO_DEVICE, &data, sizeof(data), | |
1593 | &sshdr, SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
1594 | ||
1595 | if ((driver_byte(result) & DRIVER_SENSE) && | |
1596 | (scsi_sense_valid(&sshdr))) { | |
1597 | sdev_printk(KERN_INFO, sdev, "PR command failed: %d\n", result); | |
1598 | scsi_print_sense_hdr(sdev, NULL, &sshdr); | |
1599 | } | |
1600 | ||
1601 | return result; | |
1602 | } | |
1603 | ||
1604 | static int sd_pr_register(struct block_device *bdev, u64 old_key, u64 new_key, | |
1605 | u32 flags) | |
1606 | { | |
1607 | if (flags & ~PR_FL_IGNORE_KEY) | |
1608 | return -EOPNOTSUPP; | |
1609 | return sd_pr_command(bdev, (flags & PR_FL_IGNORE_KEY) ? 0x06 : 0x00, | |
1610 | old_key, new_key, 0, | |
1611 | (1 << 0) /* APTPL */ | | |
1612 | (1 << 2) /* ALL_TG_PT */); | |
1613 | } | |
1614 | ||
1615 | static int sd_pr_reserve(struct block_device *bdev, u64 key, enum pr_type type, | |
1616 | u32 flags) | |
1617 | { | |
1618 | if (flags) | |
1619 | return -EOPNOTSUPP; | |
1620 | return sd_pr_command(bdev, 0x01, key, 0, sd_pr_type(type), 0); | |
1621 | } | |
1622 | ||
1623 | static int sd_pr_release(struct block_device *bdev, u64 key, enum pr_type type) | |
1624 | { | |
1625 | return sd_pr_command(bdev, 0x02, key, 0, sd_pr_type(type), 0); | |
1626 | } | |
1627 | ||
1628 | static int sd_pr_preempt(struct block_device *bdev, u64 old_key, u64 new_key, | |
1629 | enum pr_type type, bool abort) | |
1630 | { | |
1631 | return sd_pr_command(bdev, abort ? 0x05 : 0x04, old_key, new_key, | |
1632 | sd_pr_type(type), 0); | |
1633 | } | |
1634 | ||
1635 | static int sd_pr_clear(struct block_device *bdev, u64 key) | |
1636 | { | |
1637 | return sd_pr_command(bdev, 0x03, key, 0, 0, 0); | |
1638 | } | |
1639 | ||
1640 | static const struct pr_ops sd_pr_ops = { | |
1641 | .pr_register = sd_pr_register, | |
1642 | .pr_reserve = sd_pr_reserve, | |
1643 | .pr_release = sd_pr_release, | |
1644 | .pr_preempt = sd_pr_preempt, | |
1645 | .pr_clear = sd_pr_clear, | |
1646 | }; | |
1647 | ||
83d5cde4 | 1648 | static const struct block_device_operations sd_fops = { |
1da177e4 | 1649 | .owner = THIS_MODULE, |
0338e291 AV |
1650 | .open = sd_open, |
1651 | .release = sd_release, | |
8a6cfeb6 | 1652 | .ioctl = sd_ioctl, |
a885c8c4 | 1653 | .getgeo = sd_getgeo, |
1da177e4 | 1654 | #ifdef CONFIG_COMPAT |
0338e291 | 1655 | .compat_ioctl = sd_compat_ioctl, |
1da177e4 | 1656 | #endif |
2bae0093 | 1657 | .check_events = sd_check_events, |
1da177e4 | 1658 | .revalidate_disk = sd_revalidate_disk, |
72ec24bd | 1659 | .unlock_native_capacity = sd_unlock_native_capacity, |
924d55b0 | 1660 | .pr_ops = &sd_pr_ops, |
1da177e4 LT |
1661 | }; |
1662 | ||
18a4d0a2 MP |
1663 | /** |
1664 | * sd_eh_action - error handling callback | |
1665 | * @scmd: sd-issued command that has failed | |
18a4d0a2 MP |
1666 | * @eh_disp: The recovery disposition suggested by the midlayer |
1667 | * | |
2451079b JB |
1668 | * This function is called by the SCSI midlayer upon completion of an |
1669 | * error test command (currently TEST UNIT READY). The result of sending | |
1670 | * the eh command is passed in eh_disp. We're looking for devices that | |
1671 | * fail medium access commands but are OK with non access commands like | |
1672 | * test unit ready (so wrongly see the device as having a successful | |
1673 | * recovery) | |
18a4d0a2 | 1674 | **/ |
2451079b | 1675 | static int sd_eh_action(struct scsi_cmnd *scmd, int eh_disp) |
18a4d0a2 MP |
1676 | { |
1677 | struct scsi_disk *sdkp = scsi_disk(scmd->request->rq_disk); | |
1678 | ||
1679 | if (!scsi_device_online(scmd->device) || | |
2451079b JB |
1680 | !scsi_medium_access_command(scmd) || |
1681 | host_byte(scmd->result) != DID_TIME_OUT || | |
1682 | eh_disp != SUCCESS) | |
18a4d0a2 MP |
1683 | return eh_disp; |
1684 | ||
1685 | /* | |
1686 | * The device has timed out executing a medium access command. | |
1687 | * However, the TEST UNIT READY command sent during error | |
1688 | * handling completed successfully. Either the device is in the | |
1689 | * process of recovering or has it suffered an internal failure | |
1690 | * that prevents access to the storage medium. | |
1691 | */ | |
2451079b | 1692 | sdkp->medium_access_timed_out++; |
18a4d0a2 MP |
1693 | |
1694 | /* | |
1695 | * If the device keeps failing read/write commands but TEST UNIT | |
1696 | * READY always completes successfully we assume that medium | |
1697 | * access is no longer possible and take the device offline. | |
1698 | */ | |
1699 | if (sdkp->medium_access_timed_out >= sdkp->max_medium_access_timeouts) { | |
1700 | scmd_printk(KERN_ERR, scmd, | |
1701 | "Medium access timeout failure. Offlining disk!\n"); | |
1702 | scsi_device_set_state(scmd->device, SDEV_OFFLINE); | |
1703 | ||
1704 | return FAILED; | |
1705 | } | |
1706 | ||
1707 | return eh_disp; | |
1708 | } | |
1709 | ||
af55ff67 MP |
1710 | static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd) |
1711 | { | |
83096ebf TH |
1712 | u64 start_lba = blk_rq_pos(scmd->request); |
1713 | u64 end_lba = blk_rq_pos(scmd->request) + (scsi_bufflen(scmd) / 512); | |
74856fbf | 1714 | u64 factor = scmd->device->sector_size / 512; |
af55ff67 MP |
1715 | u64 bad_lba; |
1716 | int info_valid; | |
a8733c7b JB |
1717 | /* |
1718 | * resid is optional but mostly filled in. When it's unused, | |
1719 | * its value is zero, so we assume the whole buffer transferred | |
1720 | */ | |
1721 | unsigned int transferred = scsi_bufflen(scmd) - scsi_get_resid(scmd); | |
1722 | unsigned int good_bytes; | |
af55ff67 | 1723 | |
33659ebb | 1724 | if (scmd->request->cmd_type != REQ_TYPE_FS) |
af55ff67 MP |
1725 | return 0; |
1726 | ||
1727 | info_valid = scsi_get_sense_info_fld(scmd->sense_buffer, | |
1728 | SCSI_SENSE_BUFFERSIZE, | |
1729 | &bad_lba); | |
1730 | if (!info_valid) | |
1731 | return 0; | |
1732 | ||
1733 | if (scsi_bufflen(scmd) <= scmd->device->sector_size) | |
1734 | return 0; | |
1735 | ||
74856fbf MH |
1736 | /* be careful ... don't want any overflows */ |
1737 | do_div(start_lba, factor); | |
1738 | do_div(end_lba, factor); | |
af55ff67 MP |
1739 | |
1740 | /* The bad lba was reported incorrectly, we have no idea where | |
1741 | * the error is. | |
1742 | */ | |
1743 | if (bad_lba < start_lba || bad_lba >= end_lba) | |
1744 | return 0; | |
1745 | ||
1746 | /* This computation should always be done in terms of | |
1747 | * the resolution of the device's medium. | |
1748 | */ | |
a8733c7b JB |
1749 | good_bytes = (bad_lba - start_lba) * scmd->device->sector_size; |
1750 | return min(good_bytes, transferred); | |
af55ff67 MP |
1751 | } |
1752 | ||
1da177e4 | 1753 | /** |
7b3d9545 | 1754 | * sd_done - bottom half handler: called when the lower level |
1da177e4 LT |
1755 | * driver has completed (successfully or otherwise) a scsi command. |
1756 | * @SCpnt: mid-level's per command structure. | |
1757 | * | |
1758 | * Note: potentially run from within an ISR. Must not block. | |
1759 | **/ | |
7b3d9545 | 1760 | static int sd_done(struct scsi_cmnd *SCpnt) |
1da177e4 LT |
1761 | { |
1762 | int result = SCpnt->result; | |
af55ff67 | 1763 | unsigned int good_bytes = result ? 0 : scsi_bufflen(SCpnt); |
1da177e4 | 1764 | struct scsi_sense_hdr sshdr; |
4e7392ec | 1765 | struct scsi_disk *sdkp = scsi_disk(SCpnt->request->rq_disk); |
26e85fcd | 1766 | struct request *req = SCpnt->request; |
1da177e4 LT |
1767 | int sense_valid = 0; |
1768 | int sense_deferred = 0; | |
c98a0eb0 | 1769 | unsigned char op = SCpnt->cmnd[0]; |
5db44863 | 1770 | unsigned char unmap = SCpnt->cmnd[1] & 8; |
1da177e4 | 1771 | |
5db44863 | 1772 | if (req->cmd_flags & REQ_DISCARD || req->cmd_flags & REQ_WRITE_SAME) { |
26e85fcd MP |
1773 | if (!result) { |
1774 | good_bytes = blk_rq_bytes(req); | |
1775 | scsi_set_resid(SCpnt, 0); | |
1776 | } else { | |
1777 | good_bytes = 0; | |
1778 | scsi_set_resid(SCpnt, blk_rq_bytes(req)); | |
1779 | } | |
1780 | } | |
6a32a8ae | 1781 | |
1da177e4 LT |
1782 | if (result) { |
1783 | sense_valid = scsi_command_normalize_sense(SCpnt, &sshdr); | |
1784 | if (sense_valid) | |
1785 | sense_deferred = scsi_sense_is_deferred(&sshdr); | |
1786 | } | |
2a863ba8 DJ |
1787 | sdkp->medium_access_timed_out = 0; |
1788 | ||
03aba2f7 LT |
1789 | if (driver_byte(result) != DRIVER_SENSE && |
1790 | (!sense_valid || sense_deferred)) | |
1791 | goto out; | |
1792 | ||
1793 | switch (sshdr.sense_key) { | |
1794 | case HARDWARE_ERROR: | |
1795 | case MEDIUM_ERROR: | |
af55ff67 | 1796 | good_bytes = sd_completed_bytes(SCpnt); |
03aba2f7 LT |
1797 | break; |
1798 | case RECOVERED_ERROR: | |
af55ff67 MP |
1799 | good_bytes = scsi_bufflen(SCpnt); |
1800 | break; | |
10dab226 JW |
1801 | case NO_SENSE: |
1802 | /* This indicates a false check condition, so ignore it. An | |
1803 | * unknown amount of data was transferred so treat it as an | |
1804 | * error. | |
1805 | */ | |
10dab226 JW |
1806 | SCpnt->result = 0; |
1807 | memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); | |
1808 | break; | |
c98a0eb0 MP |
1809 | case ABORTED_COMMAND: |
1810 | if (sshdr.asc == 0x10) /* DIF: Target detected corruption */ | |
1811 | good_bytes = sd_completed_bytes(SCpnt); | |
1812 | break; | |
1813 | case ILLEGAL_REQUEST: | |
1814 | if (sshdr.asc == 0x10) /* DIX: Host detected corruption */ | |
af55ff67 | 1815 | good_bytes = sd_completed_bytes(SCpnt); |
c98a0eb0 | 1816 | /* INVALID COMMAND OPCODE or INVALID FIELD IN CDB */ |
5db44863 MP |
1817 | if (sshdr.asc == 0x20 || sshdr.asc == 0x24) { |
1818 | switch (op) { | |
1819 | case UNMAP: | |
1820 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
1821 | break; | |
1822 | case WRITE_SAME_16: | |
1823 | case WRITE_SAME: | |
1824 | if (unmap) | |
1825 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
1826 | else { | |
1827 | sdkp->device->no_write_same = 1; | |
1828 | sd_config_write_same(sdkp); | |
1829 | ||
1830 | good_bytes = 0; | |
1831 | req->__data_len = blk_rq_bytes(req); | |
1832 | req->cmd_flags |= REQ_QUIET; | |
1833 | } | |
1834 | } | |
1835 | } | |
03aba2f7 LT |
1836 | break; |
1837 | default: | |
1838 | break; | |
1da177e4 | 1839 | } |
03aba2f7 | 1840 | out: |
ef61329d HR |
1841 | SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO, SCpnt, |
1842 | "sd_done: completed %d of %d bytes\n", | |
1843 | good_bytes, scsi_bufflen(SCpnt))); | |
1844 | ||
af55ff67 MP |
1845 | if (rq_data_dir(SCpnt->request) == READ && scsi_prot_sg_count(SCpnt)) |
1846 | sd_dif_complete(SCpnt, good_bytes); | |
1847 | ||
7b3d9545 | 1848 | return good_bytes; |
1da177e4 LT |
1849 | } |
1850 | ||
1da177e4 LT |
1851 | /* |
1852 | * spinup disk - called only in sd_revalidate_disk() | |
1853 | */ | |
1854 | static void | |
e73aec82 | 1855 | sd_spinup_disk(struct scsi_disk *sdkp) |
ea73a9f2 | 1856 | { |
1da177e4 | 1857 | unsigned char cmd[10]; |
4451e472 | 1858 | unsigned long spintime_expire = 0; |
1da177e4 LT |
1859 | int retries, spintime; |
1860 | unsigned int the_result; | |
1861 | struct scsi_sense_hdr sshdr; | |
1862 | int sense_valid = 0; | |
1863 | ||
1864 | spintime = 0; | |
1865 | ||
1866 | /* Spin up drives, as required. Only do this at boot time */ | |
1867 | /* Spinup needs to be done for module loads too. */ | |
1868 | do { | |
1869 | retries = 0; | |
1870 | ||
1871 | do { | |
1872 | cmd[0] = TEST_UNIT_READY; | |
1873 | memset((void *) &cmd[1], 0, 9); | |
1874 | ||
ea73a9f2 JB |
1875 | the_result = scsi_execute_req(sdkp->device, cmd, |
1876 | DMA_NONE, NULL, 0, | |
1877 | &sshdr, SD_TIMEOUT, | |
f4f4e47e | 1878 | SD_MAX_RETRIES, NULL); |
1da177e4 | 1879 | |
b4d38e38 AS |
1880 | /* |
1881 | * If the drive has indicated to us that it | |
1882 | * doesn't have any media in it, don't bother | |
1883 | * with any more polling. | |
1884 | */ | |
1885 | if (media_not_present(sdkp, &sshdr)) | |
1886 | return; | |
1887 | ||
1da177e4 | 1888 | if (the_result) |
ea73a9f2 | 1889 | sense_valid = scsi_sense_valid(&sshdr); |
1da177e4 LT |
1890 | retries++; |
1891 | } while (retries < 3 && | |
1892 | (!scsi_status_is_good(the_result) || | |
1893 | ((driver_byte(the_result) & DRIVER_SENSE) && | |
1894 | sense_valid && sshdr.sense_key == UNIT_ATTENTION))); | |
1895 | ||
1da177e4 LT |
1896 | if ((driver_byte(the_result) & DRIVER_SENSE) == 0) { |
1897 | /* no sense, TUR either succeeded or failed | |
1898 | * with a status error */ | |
e73aec82 | 1899 | if(!spintime && !scsi_status_is_good(the_result)) { |
ef61329d HR |
1900 | sd_print_result(sdkp, "Test Unit Ready failed", |
1901 | the_result); | |
e73aec82 | 1902 | } |
1da177e4 LT |
1903 | break; |
1904 | } | |
ef61329d | 1905 | |
1da177e4 LT |
1906 | /* |
1907 | * The device does not want the automatic start to be issued. | |
1908 | */ | |
33dd6f92 | 1909 | if (sdkp->device->no_start_on_add) |
1da177e4 | 1910 | break; |
1da177e4 | 1911 | |
33dd6f92 MW |
1912 | if (sense_valid && sshdr.sense_key == NOT_READY) { |
1913 | if (sshdr.asc == 4 && sshdr.ascq == 3) | |
1914 | break; /* manual intervention required */ | |
1915 | if (sshdr.asc == 4 && sshdr.ascq == 0xb) | |
1916 | break; /* standby */ | |
1917 | if (sshdr.asc == 4 && sshdr.ascq == 0xc) | |
1918 | break; /* unavailable */ | |
1919 | /* | |
1920 | * Issue command to spin up drive when not ready | |
1921 | */ | |
1da177e4 | 1922 | if (!spintime) { |
e73aec82 | 1923 | sd_printk(KERN_NOTICE, sdkp, "Spinning up disk..."); |
1da177e4 LT |
1924 | cmd[0] = START_STOP; |
1925 | cmd[1] = 1; /* Return immediately */ | |
1926 | memset((void *) &cmd[2], 0, 8); | |
1927 | cmd[4] = 1; /* Start spin cycle */ | |
d2886ea3 SR |
1928 | if (sdkp->device->start_stop_pwr_cond) |
1929 | cmd[4] |= 1 << 4; | |
ea73a9f2 JB |
1930 | scsi_execute_req(sdkp->device, cmd, DMA_NONE, |
1931 | NULL, 0, &sshdr, | |
f4f4e47e FT |
1932 | SD_TIMEOUT, SD_MAX_RETRIES, |
1933 | NULL); | |
4451e472 AS |
1934 | spintime_expire = jiffies + 100 * HZ; |
1935 | spintime = 1; | |
1da177e4 | 1936 | } |
1da177e4 LT |
1937 | /* Wait 1 second for next try */ |
1938 | msleep(1000); | |
1939 | printk("."); | |
4451e472 AS |
1940 | |
1941 | /* | |
1942 | * Wait for USB flash devices with slow firmware. | |
1943 | * Yes, this sense key/ASC combination shouldn't | |
1944 | * occur here. It's characteristic of these devices. | |
1945 | */ | |
1946 | } else if (sense_valid && | |
1947 | sshdr.sense_key == UNIT_ATTENTION && | |
1948 | sshdr.asc == 0x28) { | |
1949 | if (!spintime) { | |
1950 | spintime_expire = jiffies + 5 * HZ; | |
1951 | spintime = 1; | |
1952 | } | |
1953 | /* Wait 1 second for next try */ | |
1954 | msleep(1000); | |
1da177e4 LT |
1955 | } else { |
1956 | /* we don't understand the sense code, so it's | |
1957 | * probably pointless to loop */ | |
1958 | if(!spintime) { | |
e73aec82 MP |
1959 | sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n"); |
1960 | sd_print_sense_hdr(sdkp, &sshdr); | |
1da177e4 LT |
1961 | } |
1962 | break; | |
1963 | } | |
1964 | ||
4451e472 | 1965 | } while (spintime && time_before_eq(jiffies, spintime_expire)); |
1da177e4 LT |
1966 | |
1967 | if (spintime) { | |
1968 | if (scsi_status_is_good(the_result)) | |
1969 | printk("ready\n"); | |
1970 | else | |
1971 | printk("not responding...\n"); | |
1972 | } | |
1973 | } | |
1974 | ||
e0597d70 MP |
1975 | |
1976 | /* | |
1977 | * Determine whether disk supports Data Integrity Field. | |
1978 | */ | |
fe542396 | 1979 | static int sd_read_protection_type(struct scsi_disk *sdkp, unsigned char *buffer) |
e0597d70 MP |
1980 | { |
1981 | struct scsi_device *sdp = sdkp->device; | |
1982 | u8 type; | |
fe542396 | 1983 | int ret = 0; |
e0597d70 MP |
1984 | |
1985 | if (scsi_device_protection(sdp) == 0 || (buffer[12] & 1) == 0) | |
fe542396 | 1986 | return ret; |
35e1a5d9 MP |
1987 | |
1988 | type = ((buffer[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */ | |
1989 | ||
fe542396 MP |
1990 | if (type > SD_DIF_TYPE3_PROTECTION) |
1991 | ret = -ENODEV; | |
1992 | else if (scsi_host_dif_capable(sdp->host, type)) | |
1993 | ret = 1; | |
1994 | ||
1995 | if (sdkp->first_scan || type != sdkp->protection_type) | |
1996 | switch (ret) { | |
1997 | case -ENODEV: | |
1998 | sd_printk(KERN_ERR, sdkp, "formatted with unsupported" \ | |
1999 | " protection type %u. Disabling disk!\n", | |
2000 | type); | |
2001 | break; | |
2002 | case 1: | |
2003 | sd_printk(KERN_NOTICE, sdkp, | |
2004 | "Enabling DIF Type %u protection\n", type); | |
2005 | break; | |
2006 | case 0: | |
2007 | sd_printk(KERN_NOTICE, sdkp, | |
2008 | "Disabling DIF Type %u protection\n", type); | |
2009 | break; | |
2010 | } | |
e0597d70 | 2011 | |
be922f47 MP |
2012 | sdkp->protection_type = type; |
2013 | ||
fe542396 | 2014 | return ret; |
e0597d70 MP |
2015 | } |
2016 | ||
0da205e0 MW |
2017 | static void read_capacity_error(struct scsi_disk *sdkp, struct scsi_device *sdp, |
2018 | struct scsi_sense_hdr *sshdr, int sense_valid, | |
2019 | int the_result) | |
2020 | { | |
0da205e0 MW |
2021 | if (driver_byte(the_result) & DRIVER_SENSE) |
2022 | sd_print_sense_hdr(sdkp, sshdr); | |
2023 | else | |
2024 | sd_printk(KERN_NOTICE, sdkp, "Sense not available.\n"); | |
2025 | ||
2026 | /* | |
2027 | * Set dirty bit for removable devices if not ready - | |
2028 | * sometimes drives will not report this properly. | |
2029 | */ | |
2030 | if (sdp->removable && | |
2031 | sense_valid && sshdr->sense_key == NOT_READY) | |
2bae0093 | 2032 | set_media_not_present(sdkp); |
0da205e0 MW |
2033 | |
2034 | /* | |
2035 | * We used to set media_present to 0 here to indicate no media | |
2036 | * in the drive, but some drives fail read capacity even with | |
2037 | * media present, so we can't do that. | |
2038 | */ | |
2039 | sdkp->capacity = 0; /* unknown mapped to zero - as usual */ | |
2040 | } | |
2041 | ||
2042 | #define RC16_LEN 32 | |
2043 | #if RC16_LEN > SD_BUF_SIZE | |
2044 | #error RC16_LEN must not be more than SD_BUF_SIZE | |
2045 | #endif | |
2046 | ||
3233ac19 JB |
2047 | #define READ_CAPACITY_RETRIES_ON_RESET 10 |
2048 | ||
0da205e0 MW |
2049 | static int read_capacity_16(struct scsi_disk *sdkp, struct scsi_device *sdp, |
2050 | unsigned char *buffer) | |
ea73a9f2 | 2051 | { |
1da177e4 | 2052 | unsigned char cmd[16]; |
1da177e4 LT |
2053 | struct scsi_sense_hdr sshdr; |
2054 | int sense_valid = 0; | |
0da205e0 | 2055 | int the_result; |
3233ac19 | 2056 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
ea09bcc9 | 2057 | unsigned int alignment; |
0da205e0 MW |
2058 | unsigned long long lba; |
2059 | unsigned sector_size; | |
1da177e4 | 2060 | |
5ce524bd HG |
2061 | if (sdp->no_read_capacity_16) |
2062 | return -EINVAL; | |
2063 | ||
1da177e4 | 2064 | do { |
0da205e0 | 2065 | memset(cmd, 0, 16); |
eb846d9f | 2066 | cmd[0] = SERVICE_ACTION_IN_16; |
0da205e0 MW |
2067 | cmd[1] = SAI_READ_CAPACITY_16; |
2068 | cmd[13] = RC16_LEN; | |
2069 | memset(buffer, 0, RC16_LEN); | |
2070 | ||
ea73a9f2 | 2071 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, |
0da205e0 MW |
2072 | buffer, RC16_LEN, &sshdr, |
2073 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
1da177e4 | 2074 | |
ea73a9f2 | 2075 | if (media_not_present(sdkp, &sshdr)) |
0da205e0 | 2076 | return -ENODEV; |
1da177e4 | 2077 | |
2b301307 | 2078 | if (the_result) { |
ea73a9f2 | 2079 | sense_valid = scsi_sense_valid(&sshdr); |
2b301307 MW |
2080 | if (sense_valid && |
2081 | sshdr.sense_key == ILLEGAL_REQUEST && | |
2082 | (sshdr.asc == 0x20 || sshdr.asc == 0x24) && | |
2083 | sshdr.ascq == 0x00) | |
2084 | /* Invalid Command Operation Code or | |
2085 | * Invalid Field in CDB, just retry | |
2086 | * silently with RC10 */ | |
2087 | return -EINVAL; | |
3233ac19 JB |
2088 | if (sense_valid && |
2089 | sshdr.sense_key == UNIT_ATTENTION && | |
2090 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) | |
2091 | /* Device reset might occur several times, | |
2092 | * give it one more chance */ | |
2093 | if (--reset_retries > 0) | |
2094 | continue; | |
2b301307 | 2095 | } |
1da177e4 LT |
2096 | retries--; |
2097 | ||
2098 | } while (the_result && retries); | |
2099 | ||
0da205e0 | 2100 | if (the_result) { |
ef61329d | 2101 | sd_print_result(sdkp, "Read Capacity(16) failed", the_result); |
0da205e0 MW |
2102 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); |
2103 | return -EINVAL; | |
2104 | } | |
e73aec82 | 2105 | |
8f76d151 DH |
2106 | sector_size = get_unaligned_be32(&buffer[8]); |
2107 | lba = get_unaligned_be64(&buffer[0]); | |
0da205e0 | 2108 | |
fe542396 MP |
2109 | if (sd_read_protection_type(sdkp, buffer) < 0) { |
2110 | sdkp->capacity = 0; | |
2111 | return -ENODEV; | |
2112 | } | |
0da205e0 MW |
2113 | |
2114 | if ((sizeof(sdkp->capacity) == 4) && (lba >= 0xffffffffULL)) { | |
2115 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a " | |
2116 | "kernel compiled with support for large block " | |
2117 | "devices.\n"); | |
2118 | sdkp->capacity = 0; | |
2119 | return -EOVERFLOW; | |
2120 | } | |
2121 | ||
ea09bcc9 | 2122 | /* Logical blocks per physical block exponent */ |
526f7c79 | 2123 | sdkp->physical_block_size = (1 << (buffer[13] & 0xf)) * sector_size; |
ea09bcc9 MP |
2124 | |
2125 | /* Lowest aligned logical block */ | |
2126 | alignment = ((buffer[14] & 0x3f) << 8 | buffer[15]) * sector_size; | |
2127 | blk_queue_alignment_offset(sdp->request_queue, alignment); | |
2128 | if (alignment && sdkp->first_scan) | |
2129 | sd_printk(KERN_NOTICE, sdkp, | |
2130 | "physical block alignment offset: %u\n", alignment); | |
2131 | ||
c98a0eb0 MP |
2132 | if (buffer[14] & 0x80) { /* LBPME */ |
2133 | sdkp->lbpme = 1; | |
e339c1a7 | 2134 | |
c98a0eb0 MP |
2135 | if (buffer[14] & 0x40) /* LBPRZ */ |
2136 | sdkp->lbprz = 1; | |
e339c1a7 | 2137 | |
c98a0eb0 | 2138 | sd_config_discard(sdkp, SD_LBP_WS16); |
e339c1a7 MP |
2139 | } |
2140 | ||
0da205e0 MW |
2141 | sdkp->capacity = lba + 1; |
2142 | return sector_size; | |
2143 | } | |
2144 | ||
2145 | static int read_capacity_10(struct scsi_disk *sdkp, struct scsi_device *sdp, | |
2146 | unsigned char *buffer) | |
2147 | { | |
2148 | unsigned char cmd[16]; | |
2149 | struct scsi_sense_hdr sshdr; | |
2150 | int sense_valid = 0; | |
2151 | int the_result; | |
3233ac19 | 2152 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
0da205e0 MW |
2153 | sector_t lba; |
2154 | unsigned sector_size; | |
2155 | ||
2156 | do { | |
2157 | cmd[0] = READ_CAPACITY; | |
2158 | memset(&cmd[1], 0, 9); | |
2159 | memset(buffer, 0, 8); | |
2160 | ||
2161 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, | |
2162 | buffer, 8, &sshdr, | |
2163 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
2164 | ||
2165 | if (media_not_present(sdkp, &sshdr)) | |
2166 | return -ENODEV; | |
2167 | ||
3233ac19 | 2168 | if (the_result) { |
0da205e0 | 2169 | sense_valid = scsi_sense_valid(&sshdr); |
3233ac19 JB |
2170 | if (sense_valid && |
2171 | sshdr.sense_key == UNIT_ATTENTION && | |
2172 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) | |
2173 | /* Device reset might occur several times, | |
2174 | * give it one more chance */ | |
2175 | if (--reset_retries > 0) | |
2176 | continue; | |
2177 | } | |
0da205e0 MW |
2178 | retries--; |
2179 | ||
2180 | } while (the_result && retries); | |
2181 | ||
2182 | if (the_result) { | |
ef61329d | 2183 | sd_print_result(sdkp, "Read Capacity(10) failed", the_result); |
0da205e0 MW |
2184 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); |
2185 | return -EINVAL; | |
2186 | } | |
2187 | ||
8f76d151 DH |
2188 | sector_size = get_unaligned_be32(&buffer[4]); |
2189 | lba = get_unaligned_be32(&buffer[0]); | |
0da205e0 | 2190 | |
5ce524bd HG |
2191 | if (sdp->no_read_capacity_16 && (lba == 0xffffffff)) { |
2192 | /* Some buggy (usb cardreader) devices return an lba of | |
2193 | 0xffffffff when the want to report a size of 0 (with | |
2194 | which they really mean no media is present) */ | |
2195 | sdkp->capacity = 0; | |
5cc10350 | 2196 | sdkp->physical_block_size = sector_size; |
5ce524bd HG |
2197 | return sector_size; |
2198 | } | |
2199 | ||
0da205e0 MW |
2200 | if ((sizeof(sdkp->capacity) == 4) && (lba == 0xffffffff)) { |
2201 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a " | |
2202 | "kernel compiled with support for large block " | |
2203 | "devices.\n"); | |
2204 | sdkp->capacity = 0; | |
2205 | return -EOVERFLOW; | |
2206 | } | |
2207 | ||
2208 | sdkp->capacity = lba + 1; | |
526f7c79 | 2209 | sdkp->physical_block_size = sector_size; |
0da205e0 MW |
2210 | return sector_size; |
2211 | } | |
2212 | ||
2b301307 MW |
2213 | static int sd_try_rc16_first(struct scsi_device *sdp) |
2214 | { | |
f87146bb HR |
2215 | if (sdp->host->max_cmd_len < 16) |
2216 | return 0; | |
6a0bdffa AS |
2217 | if (sdp->try_rc_10_first) |
2218 | return 0; | |
2b301307 MW |
2219 | if (sdp->scsi_level > SCSI_SPC_2) |
2220 | return 1; | |
2221 | if (scsi_device_protection(sdp)) | |
2222 | return 1; | |
2223 | return 0; | |
2224 | } | |
2225 | ||
0da205e0 MW |
2226 | /* |
2227 | * read disk capacity | |
2228 | */ | |
2229 | static void | |
2230 | sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer) | |
2231 | { | |
2232 | int sector_size; | |
2233 | struct scsi_device *sdp = sdkp->device; | |
70a9b873 | 2234 | sector_t old_capacity = sdkp->capacity; |
0da205e0 | 2235 | |
2b301307 | 2236 | if (sd_try_rc16_first(sdp)) { |
0da205e0 MW |
2237 | sector_size = read_capacity_16(sdkp, sdp, buffer); |
2238 | if (sector_size == -EOVERFLOW) | |
1da177e4 | 2239 | goto got_data; |
2b301307 MW |
2240 | if (sector_size == -ENODEV) |
2241 | return; | |
2242 | if (sector_size < 0) | |
2243 | sector_size = read_capacity_10(sdkp, sdp, buffer); | |
0da205e0 MW |
2244 | if (sector_size < 0) |
2245 | return; | |
1da177e4 | 2246 | } else { |
0da205e0 MW |
2247 | sector_size = read_capacity_10(sdkp, sdp, buffer); |
2248 | if (sector_size == -EOVERFLOW) | |
2249 | goto got_data; | |
2250 | if (sector_size < 0) | |
2251 | return; | |
2252 | if ((sizeof(sdkp->capacity) > 4) && | |
2253 | (sdkp->capacity > 0xffffffffULL)) { | |
2254 | int old_sector_size = sector_size; | |
2255 | sd_printk(KERN_NOTICE, sdkp, "Very big device. " | |
2256 | "Trying to use READ CAPACITY(16).\n"); | |
2257 | sector_size = read_capacity_16(sdkp, sdp, buffer); | |
2258 | if (sector_size < 0) { | |
2259 | sd_printk(KERN_NOTICE, sdkp, | |
2260 | "Using 0xffffffff as device size\n"); | |
2261 | sdkp->capacity = 1 + (sector_t) 0xffffffff; | |
2262 | sector_size = old_sector_size; | |
2263 | goto got_data; | |
2264 | } | |
2265 | } | |
2266 | } | |
1da177e4 | 2267 | |
5c211caa AS |
2268 | /* Some devices are known to return the total number of blocks, |
2269 | * not the highest block number. Some devices have versions | |
2270 | * which do this and others which do not. Some devices we might | |
2271 | * suspect of doing this but we don't know for certain. | |
2272 | * | |
2273 | * If we know the reported capacity is wrong, decrement it. If | |
2274 | * we can only guess, then assume the number of blocks is even | |
2275 | * (usually true but not always) and err on the side of lowering | |
2276 | * the capacity. | |
2277 | */ | |
2278 | if (sdp->fix_capacity || | |
2279 | (sdp->guess_capacity && (sdkp->capacity & 0x01))) { | |
2280 | sd_printk(KERN_INFO, sdkp, "Adjusting the sector count " | |
2281 | "from its reported value: %llu\n", | |
2282 | (unsigned long long) sdkp->capacity); | |
1da177e4 | 2283 | --sdkp->capacity; |
61bf54b7 ON |
2284 | } |
2285 | ||
1da177e4 LT |
2286 | got_data: |
2287 | if (sector_size == 0) { | |
2288 | sector_size = 512; | |
e73aec82 MP |
2289 | sd_printk(KERN_NOTICE, sdkp, "Sector size 0 reported, " |
2290 | "assuming 512.\n"); | |
1da177e4 LT |
2291 | } |
2292 | ||
2293 | if (sector_size != 512 && | |
2294 | sector_size != 1024 && | |
2295 | sector_size != 2048 && | |
74856fbf | 2296 | sector_size != 4096) { |
e73aec82 MP |
2297 | sd_printk(KERN_NOTICE, sdkp, "Unsupported sector size %d.\n", |
2298 | sector_size); | |
1da177e4 LT |
2299 | /* |
2300 | * The user might want to re-format the drive with | |
2301 | * a supported sectorsize. Once this happens, it | |
2302 | * would be relatively trivial to set the thing up. | |
2303 | * For this reason, we leave the thing in the table. | |
2304 | */ | |
2305 | sdkp->capacity = 0; | |
2306 | /* | |
2307 | * set a bogus sector size so the normal read/write | |
2308 | * logic in the block layer will eventually refuse any | |
2309 | * request on this device without tripping over power | |
2310 | * of two sector size assumptions | |
2311 | */ | |
2312 | sector_size = 512; | |
2313 | } | |
e1defc4f | 2314 | blk_queue_logical_block_size(sdp->request_queue, sector_size); |
7404ad3b | 2315 | |
1da177e4 | 2316 | { |
7404ad3b | 2317 | char cap_str_2[10], cap_str_10[10]; |
1da177e4 | 2318 | |
b9f28d86 JB |
2319 | string_get_size(sdkp->capacity, sector_size, |
2320 | STRING_UNITS_2, cap_str_2, sizeof(cap_str_2)); | |
2321 | string_get_size(sdkp->capacity, sector_size, | |
2322 | STRING_UNITS_10, cap_str_10, | |
7404ad3b | 2323 | sizeof(cap_str_10)); |
1da177e4 | 2324 | |
ea09bcc9 | 2325 | if (sdkp->first_scan || old_capacity != sdkp->capacity) { |
70a9b873 | 2326 | sd_printk(KERN_NOTICE, sdkp, |
ea09bcc9 | 2327 | "%llu %d-byte logical blocks: (%s/%s)\n", |
70a9b873 MP |
2328 | (unsigned long long)sdkp->capacity, |
2329 | sector_size, cap_str_10, cap_str_2); | |
ea09bcc9 | 2330 | |
526f7c79 | 2331 | if (sdkp->physical_block_size != sector_size) |
ea09bcc9 MP |
2332 | sd_printk(KERN_NOTICE, sdkp, |
2333 | "%u-byte physical blocks\n", | |
526f7c79 | 2334 | sdkp->physical_block_size); |
ea09bcc9 | 2335 | } |
1da177e4 LT |
2336 | } |
2337 | ||
ca369d51 | 2338 | if (sdkp->capacity > 0xffffffff) |
bcdb247c | 2339 | sdp->use_16_for_rw = 1; |
53ad570b | 2340 | |
526f7c79 MP |
2341 | blk_queue_physical_block_size(sdp->request_queue, |
2342 | sdkp->physical_block_size); | |
1da177e4 LT |
2343 | sdkp->device->sector_size = sector_size; |
2344 | } | |
2345 | ||
2346 | /* called with buffer of length 512 */ | |
2347 | static inline int | |
ea73a9f2 JB |
2348 | sd_do_mode_sense(struct scsi_device *sdp, int dbd, int modepage, |
2349 | unsigned char *buffer, int len, struct scsi_mode_data *data, | |
2350 | struct scsi_sense_hdr *sshdr) | |
1da177e4 | 2351 | { |
ea73a9f2 | 2352 | return scsi_mode_sense(sdp, dbd, modepage, buffer, len, |
1cf72699 | 2353 | SD_TIMEOUT, SD_MAX_RETRIES, data, |
ea73a9f2 | 2354 | sshdr); |
1da177e4 LT |
2355 | } |
2356 | ||
2357 | /* | |
2358 | * read write protect setting, if possible - called only in sd_revalidate_disk() | |
48970800 | 2359 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
2360 | */ |
2361 | static void | |
e73aec82 | 2362 | sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer) |
ea73a9f2 | 2363 | { |
1da177e4 | 2364 | int res; |
ea73a9f2 | 2365 | struct scsi_device *sdp = sdkp->device; |
1da177e4 | 2366 | struct scsi_mode_data data; |
70a9b873 | 2367 | int old_wp = sdkp->write_prot; |
1da177e4 LT |
2368 | |
2369 | set_disk_ro(sdkp->disk, 0); | |
ea73a9f2 | 2370 | if (sdp->skip_ms_page_3f) { |
b2bff6ce | 2371 | sd_first_printk(KERN_NOTICE, sdkp, "Assuming Write Enabled\n"); |
1da177e4 LT |
2372 | return; |
2373 | } | |
2374 | ||
ea73a9f2 JB |
2375 | if (sdp->use_192_bytes_for_3f) { |
2376 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 192, &data, NULL); | |
1da177e4 LT |
2377 | } else { |
2378 | /* | |
2379 | * First attempt: ask for all pages (0x3F), but only 4 bytes. | |
2380 | * We have to start carefully: some devices hang if we ask | |
2381 | * for more than is available. | |
2382 | */ | |
ea73a9f2 | 2383 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 4, &data, NULL); |
1da177e4 LT |
2384 | |
2385 | /* | |
2386 | * Second attempt: ask for page 0 When only page 0 is | |
2387 | * implemented, a request for page 3F may return Sense Key | |
2388 | * 5: Illegal Request, Sense Code 24: Invalid field in | |
2389 | * CDB. | |
2390 | */ | |
2391 | if (!scsi_status_is_good(res)) | |
ea73a9f2 | 2392 | res = sd_do_mode_sense(sdp, 0, 0, buffer, 4, &data, NULL); |
1da177e4 LT |
2393 | |
2394 | /* | |
2395 | * Third attempt: ask 255 bytes, as we did earlier. | |
2396 | */ | |
2397 | if (!scsi_status_is_good(res)) | |
ea73a9f2 JB |
2398 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 255, |
2399 | &data, NULL); | |
1da177e4 LT |
2400 | } |
2401 | ||
2402 | if (!scsi_status_is_good(res)) { | |
b2bff6ce | 2403 | sd_first_printk(KERN_WARNING, sdkp, |
e73aec82 | 2404 | "Test WP failed, assume Write Enabled\n"); |
1da177e4 LT |
2405 | } else { |
2406 | sdkp->write_prot = ((data.device_specific & 0x80) != 0); | |
2407 | set_disk_ro(sdkp->disk, sdkp->write_prot); | |
70a9b873 MP |
2408 | if (sdkp->first_scan || old_wp != sdkp->write_prot) { |
2409 | sd_printk(KERN_NOTICE, sdkp, "Write Protect is %s\n", | |
2410 | sdkp->write_prot ? "on" : "off"); | |
2411 | sd_printk(KERN_DEBUG, sdkp, | |
2412 | "Mode Sense: %02x %02x %02x %02x\n", | |
2413 | buffer[0], buffer[1], buffer[2], buffer[3]); | |
2414 | } | |
1da177e4 LT |
2415 | } |
2416 | } | |
2417 | ||
2418 | /* | |
2419 | * sd_read_cache_type - called only from sd_revalidate_disk() | |
48970800 | 2420 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
2421 | */ |
2422 | static void | |
e73aec82 | 2423 | sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer) |
631e8a13 | 2424 | { |
1da177e4 | 2425 | int len = 0, res; |
ea73a9f2 | 2426 | struct scsi_device *sdp = sdkp->device; |
1da177e4 | 2427 | |
631e8a13 AV |
2428 | int dbd; |
2429 | int modepage; | |
0bcaa111 | 2430 | int first_len; |
1da177e4 LT |
2431 | struct scsi_mode_data data; |
2432 | struct scsi_sense_hdr sshdr; | |
70a9b873 MP |
2433 | int old_wce = sdkp->WCE; |
2434 | int old_rcd = sdkp->RCD; | |
2435 | int old_dpofua = sdkp->DPOFUA; | |
1da177e4 | 2436 | |
39c60a09 JB |
2437 | |
2438 | if (sdkp->cache_override) | |
2439 | return; | |
2440 | ||
0bcaa111 LT |
2441 | first_len = 4; |
2442 | if (sdp->skip_ms_page_8) { | |
2443 | if (sdp->type == TYPE_RBC) | |
2444 | goto defaults; | |
2445 | else { | |
2446 | if (sdp->skip_ms_page_3f) | |
2447 | goto defaults; | |
2448 | modepage = 0x3F; | |
2449 | if (sdp->use_192_bytes_for_3f) | |
2450 | first_len = 192; | |
2451 | dbd = 0; | |
2452 | } | |
2453 | } else if (sdp->type == TYPE_RBC) { | |
631e8a13 AV |
2454 | modepage = 6; |
2455 | dbd = 8; | |
2456 | } else { | |
2457 | modepage = 8; | |
2458 | dbd = 0; | |
2459 | } | |
2460 | ||
1da177e4 | 2461 | /* cautiously ask */ |
0bcaa111 LT |
2462 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, first_len, |
2463 | &data, &sshdr); | |
1da177e4 LT |
2464 | |
2465 | if (!scsi_status_is_good(res)) | |
2466 | goto bad_sense; | |
2467 | ||
6d73c851 AV |
2468 | if (!data.header_length) { |
2469 | modepage = 6; | |
0bcaa111 | 2470 | first_len = 0; |
b2bff6ce MP |
2471 | sd_first_printk(KERN_ERR, sdkp, |
2472 | "Missing header in MODE_SENSE response\n"); | |
6d73c851 AV |
2473 | } |
2474 | ||
1da177e4 LT |
2475 | /* that went OK, now ask for the proper length */ |
2476 | len = data.length; | |
2477 | ||
2478 | /* | |
2479 | * We're only interested in the first three bytes, actually. | |
2480 | * But the data cache page is defined for the first 20. | |
2481 | */ | |
2482 | if (len < 3) | |
2483 | goto bad_sense; | |
0bcaa111 | 2484 | else if (len > SD_BUF_SIZE) { |
b2bff6ce | 2485 | sd_first_printk(KERN_NOTICE, sdkp, "Truncating mode parameter " |
0bcaa111 LT |
2486 | "data from %d to %d bytes\n", len, SD_BUF_SIZE); |
2487 | len = SD_BUF_SIZE; | |
2488 | } | |
2489 | if (modepage == 0x3F && sdp->use_192_bytes_for_3f) | |
2490 | len = 192; | |
1da177e4 LT |
2491 | |
2492 | /* Get the data */ | |
0bcaa111 LT |
2493 | if (len > first_len) |
2494 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, len, | |
2495 | &data, &sshdr); | |
1da177e4 LT |
2496 | |
2497 | if (scsi_status_is_good(res)) { | |
631e8a13 | 2498 | int offset = data.header_length + data.block_descriptor_length; |
1da177e4 | 2499 | |
0bcaa111 LT |
2500 | while (offset < len) { |
2501 | u8 page_code = buffer[offset] & 0x3F; | |
2502 | u8 spf = buffer[offset] & 0x40; | |
2503 | ||
2504 | if (page_code == 8 || page_code == 6) { | |
2505 | /* We're interested only in the first 3 bytes. | |
2506 | */ | |
2507 | if (len - offset <= 2) { | |
b2bff6ce MP |
2508 | sd_first_printk(KERN_ERR, sdkp, |
2509 | "Incomplete mode parameter " | |
2510 | "data\n"); | |
0bcaa111 LT |
2511 | goto defaults; |
2512 | } else { | |
2513 | modepage = page_code; | |
2514 | goto Page_found; | |
2515 | } | |
2516 | } else { | |
2517 | /* Go to the next page */ | |
2518 | if (spf && len - offset > 3) | |
2519 | offset += 4 + (buffer[offset+2] << 8) + | |
2520 | buffer[offset+3]; | |
2521 | else if (!spf && len - offset > 1) | |
2522 | offset += 2 + buffer[offset+1]; | |
2523 | else { | |
b2bff6ce MP |
2524 | sd_first_printk(KERN_ERR, sdkp, |
2525 | "Incomplete mode " | |
2526 | "parameter data\n"); | |
0bcaa111 LT |
2527 | goto defaults; |
2528 | } | |
2529 | } | |
48970800 AV |
2530 | } |
2531 | ||
b2bff6ce | 2532 | sd_first_printk(KERN_ERR, sdkp, "No Caching mode page found\n"); |
984f1733 AS |
2533 | goto defaults; |
2534 | ||
0bcaa111 | 2535 | Page_found: |
631e8a13 AV |
2536 | if (modepage == 8) { |
2537 | sdkp->WCE = ((buffer[offset + 2] & 0x04) != 0); | |
2538 | sdkp->RCD = ((buffer[offset + 2] & 0x01) != 0); | |
2539 | } else { | |
2540 | sdkp->WCE = ((buffer[offset + 2] & 0x01) == 0); | |
2541 | sdkp->RCD = 0; | |
2542 | } | |
1da177e4 | 2543 | |
007365ad | 2544 | sdkp->DPOFUA = (data.device_specific & 0x10) != 0; |
b14bf2d0 AS |
2545 | if (sdp->broken_fua) { |
2546 | sd_first_printk(KERN_NOTICE, sdkp, "Disabling FUA\n"); | |
2547 | sdkp->DPOFUA = 0; | |
2548 | } else if (sdkp->DPOFUA && !sdkp->device->use_10_for_rw) { | |
b2bff6ce | 2549 | sd_first_printk(KERN_NOTICE, sdkp, |
e73aec82 | 2550 | "Uses READ/WRITE(6), disabling FUA\n"); |
007365ad TH |
2551 | sdkp->DPOFUA = 0; |
2552 | } | |
2553 | ||
2eefd57b SRT |
2554 | /* No cache flush allowed for write protected devices */ |
2555 | if (sdkp->WCE && sdkp->write_prot) | |
2556 | sdkp->WCE = 0; | |
2557 | ||
70a9b873 MP |
2558 | if (sdkp->first_scan || old_wce != sdkp->WCE || |
2559 | old_rcd != sdkp->RCD || old_dpofua != sdkp->DPOFUA) | |
2560 | sd_printk(KERN_NOTICE, sdkp, | |
2561 | "Write cache: %s, read cache: %s, %s\n", | |
2562 | sdkp->WCE ? "enabled" : "disabled", | |
2563 | sdkp->RCD ? "disabled" : "enabled", | |
2564 | sdkp->DPOFUA ? "supports DPO and FUA" | |
2565 | : "doesn't support DPO or FUA"); | |
1da177e4 LT |
2566 | |
2567 | return; | |
2568 | } | |
2569 | ||
2570 | bad_sense: | |
ea73a9f2 | 2571 | if (scsi_sense_valid(&sshdr) && |
1da177e4 LT |
2572 | sshdr.sense_key == ILLEGAL_REQUEST && |
2573 | sshdr.asc == 0x24 && sshdr.ascq == 0x0) | |
e73aec82 | 2574 | /* Invalid field in CDB */ |
b2bff6ce | 2575 | sd_first_printk(KERN_NOTICE, sdkp, "Cache data unavailable\n"); |
1da177e4 | 2576 | else |
b2bff6ce MP |
2577 | sd_first_printk(KERN_ERR, sdkp, |
2578 | "Asking for cache data failed\n"); | |
1da177e4 LT |
2579 | |
2580 | defaults: | |
b81478d8 | 2581 | if (sdp->wce_default_on) { |
b2bff6ce MP |
2582 | sd_first_printk(KERN_NOTICE, sdkp, |
2583 | "Assuming drive cache: write back\n"); | |
b81478d8 NJ |
2584 | sdkp->WCE = 1; |
2585 | } else { | |
b2bff6ce MP |
2586 | sd_first_printk(KERN_ERR, sdkp, |
2587 | "Assuming drive cache: write through\n"); | |
b81478d8 NJ |
2588 | sdkp->WCE = 0; |
2589 | } | |
1da177e4 | 2590 | sdkp->RCD = 0; |
48970800 | 2591 | sdkp->DPOFUA = 0; |
1da177e4 LT |
2592 | } |
2593 | ||
e0597d70 MP |
2594 | /* |
2595 | * The ATO bit indicates whether the DIF application tag is available | |
2596 | * for use by the operating system. | |
2597 | */ | |
439d77f7 | 2598 | static void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer) |
e0597d70 MP |
2599 | { |
2600 | int res, offset; | |
2601 | struct scsi_device *sdp = sdkp->device; | |
2602 | struct scsi_mode_data data; | |
2603 | struct scsi_sense_hdr sshdr; | |
2604 | ||
2605 | if (sdp->type != TYPE_DISK) | |
2606 | return; | |
2607 | ||
2608 | if (sdkp->protection_type == 0) | |
2609 | return; | |
2610 | ||
2611 | res = scsi_mode_sense(sdp, 1, 0x0a, buffer, 36, SD_TIMEOUT, | |
2612 | SD_MAX_RETRIES, &data, &sshdr); | |
2613 | ||
2614 | if (!scsi_status_is_good(res) || !data.header_length || | |
2615 | data.length < 6) { | |
b2bff6ce | 2616 | sd_first_printk(KERN_WARNING, sdkp, |
e0597d70 MP |
2617 | "getting Control mode page failed, assume no ATO\n"); |
2618 | ||
2619 | if (scsi_sense_valid(&sshdr)) | |
2620 | sd_print_sense_hdr(sdkp, &sshdr); | |
2621 | ||
2622 | return; | |
2623 | } | |
2624 | ||
2625 | offset = data.header_length + data.block_descriptor_length; | |
2626 | ||
2627 | if ((buffer[offset] & 0x3f) != 0x0a) { | |
b2bff6ce | 2628 | sd_first_printk(KERN_ERR, sdkp, "ATO Got wrong page\n"); |
e0597d70 MP |
2629 | return; |
2630 | } | |
2631 | ||
2632 | if ((buffer[offset + 5] & 0x80) == 0) | |
2633 | return; | |
2634 | ||
2635 | sdkp->ATO = 1; | |
2636 | ||
2637 | return; | |
2638 | } | |
2639 | ||
d11b6916 MP |
2640 | /** |
2641 | * sd_read_block_limits - Query disk device for preferred I/O sizes. | |
2642 | * @disk: disk to query | |
2643 | */ | |
2644 | static void sd_read_block_limits(struct scsi_disk *sdkp) | |
2645 | { | |
2646 | unsigned int sector_sz = sdkp->device->sector_size; | |
bb2d3de1 | 2647 | const int vpd_len = 64; |
e3deec09 | 2648 | unsigned char *buffer = kmalloc(vpd_len, GFP_KERNEL); |
d11b6916 | 2649 | |
e3deec09 JB |
2650 | if (!buffer || |
2651 | /* Block Limits VPD */ | |
2652 | scsi_get_vpd_page(sdkp->device, 0xb0, buffer, vpd_len)) | |
2653 | goto out; | |
d11b6916 MP |
2654 | |
2655 | blk_queue_io_min(sdkp->disk->queue, | |
2656 | get_unaligned_be16(&buffer[6]) * sector_sz); | |
ca369d51 MP |
2657 | |
2658 | sdkp->max_xfer_blocks = get_unaligned_be32(&buffer[8]); | |
2659 | sdkp->opt_xfer_blocks = get_unaligned_be32(&buffer[12]); | |
d11b6916 | 2660 | |
c98a0eb0 MP |
2661 | if (buffer[3] == 0x3c) { |
2662 | unsigned int lba_count, desc_count; | |
e339c1a7 | 2663 | |
5db44863 | 2664 | sdkp->max_ws_blocks = (u32)get_unaligned_be64(&buffer[36]); |
e339c1a7 | 2665 | |
c98a0eb0 | 2666 | if (!sdkp->lbpme) |
045d3fe7 | 2667 | goto out; |
045d3fe7 | 2668 | |
c98a0eb0 MP |
2669 | lba_count = get_unaligned_be32(&buffer[20]); |
2670 | desc_count = get_unaligned_be32(&buffer[24]); | |
045d3fe7 | 2671 | |
c98a0eb0 MP |
2672 | if (lba_count && desc_count) |
2673 | sdkp->max_unmap_blocks = lba_count; | |
e339c1a7 | 2674 | |
c98a0eb0 | 2675 | sdkp->unmap_granularity = get_unaligned_be32(&buffer[28]); |
e339c1a7 MP |
2676 | |
2677 | if (buffer[32] & 0x80) | |
c98a0eb0 | 2678 | sdkp->unmap_alignment = |
e339c1a7 | 2679 | get_unaligned_be32(&buffer[32]) & ~(1 << 31); |
c98a0eb0 MP |
2680 | |
2681 | if (!sdkp->lbpvpd) { /* LBP VPD page not provided */ | |
2682 | ||
2683 | if (sdkp->max_unmap_blocks) | |
2684 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
2685 | else | |
2686 | sd_config_discard(sdkp, SD_LBP_WS16); | |
2687 | ||
2688 | } else { /* LBP VPD page tells us what to use */ | |
e461338b MP |
2689 | if (sdkp->lbpu && sdkp->max_unmap_blocks && !sdkp->lbprz) |
2690 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
2691 | else if (sdkp->lbpws) | |
c98a0eb0 MP |
2692 | sd_config_discard(sdkp, SD_LBP_WS16); |
2693 | else if (sdkp->lbpws10) | |
2694 | sd_config_discard(sdkp, SD_LBP_WS10); | |
7985090a MP |
2695 | else if (sdkp->lbpu && sdkp->max_unmap_blocks) |
2696 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
c98a0eb0 MP |
2697 | else |
2698 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
2699 | } | |
e339c1a7 MP |
2700 | } |
2701 | ||
e3deec09 | 2702 | out: |
d11b6916 MP |
2703 | kfree(buffer); |
2704 | } | |
2705 | ||
3821d768 MP |
2706 | /** |
2707 | * sd_read_block_characteristics - Query block dev. characteristics | |
2708 | * @disk: disk to query | |
2709 | */ | |
2710 | static void sd_read_block_characteristics(struct scsi_disk *sdkp) | |
2711 | { | |
e3deec09 | 2712 | unsigned char *buffer; |
3821d768 | 2713 | u16 rot; |
bb2d3de1 | 2714 | const int vpd_len = 64; |
3821d768 | 2715 | |
e3deec09 | 2716 | buffer = kmalloc(vpd_len, GFP_KERNEL); |
3821d768 | 2717 | |
e3deec09 JB |
2718 | if (!buffer || |
2719 | /* Block Device Characteristics VPD */ | |
2720 | scsi_get_vpd_page(sdkp->device, 0xb1, buffer, vpd_len)) | |
2721 | goto out; | |
3821d768 MP |
2722 | |
2723 | rot = get_unaligned_be16(&buffer[4]); | |
2724 | ||
b277da0a | 2725 | if (rot == 1) { |
3821d768 | 2726 | queue_flag_set_unlocked(QUEUE_FLAG_NONROT, sdkp->disk->queue); |
b277da0a MS |
2727 | queue_flag_clear_unlocked(QUEUE_FLAG_ADD_RANDOM, sdkp->disk->queue); |
2728 | } | |
3821d768 | 2729 | |
e3deec09 | 2730 | out: |
3821d768 MP |
2731 | kfree(buffer); |
2732 | } | |
2733 | ||
045d3fe7 | 2734 | /** |
c98a0eb0 | 2735 | * sd_read_block_provisioning - Query provisioning VPD page |
045d3fe7 MP |
2736 | * @disk: disk to query |
2737 | */ | |
c98a0eb0 | 2738 | static void sd_read_block_provisioning(struct scsi_disk *sdkp) |
045d3fe7 MP |
2739 | { |
2740 | unsigned char *buffer; | |
2741 | const int vpd_len = 8; | |
2742 | ||
c98a0eb0 | 2743 | if (sdkp->lbpme == 0) |
045d3fe7 MP |
2744 | return; |
2745 | ||
2746 | buffer = kmalloc(vpd_len, GFP_KERNEL); | |
2747 | ||
2748 | if (!buffer || scsi_get_vpd_page(sdkp->device, 0xb2, buffer, vpd_len)) | |
2749 | goto out; | |
2750 | ||
c98a0eb0 MP |
2751 | sdkp->lbpvpd = 1; |
2752 | sdkp->lbpu = (buffer[5] >> 7) & 1; /* UNMAP */ | |
2753 | sdkp->lbpws = (buffer[5] >> 6) & 1; /* WRITE SAME(16) with UNMAP */ | |
2754 | sdkp->lbpws10 = (buffer[5] >> 5) & 1; /* WRITE SAME(10) with UNMAP */ | |
045d3fe7 MP |
2755 | |
2756 | out: | |
2757 | kfree(buffer); | |
2758 | } | |
2759 | ||
5db44863 MP |
2760 | static void sd_read_write_same(struct scsi_disk *sdkp, unsigned char *buffer) |
2761 | { | |
66c28f97 MP |
2762 | struct scsi_device *sdev = sdkp->device; |
2763 | ||
54b2b50c MP |
2764 | if (sdev->host->no_write_same) { |
2765 | sdev->no_write_same = 1; | |
2766 | ||
2767 | return; | |
2768 | } | |
2769 | ||
66c28f97 | 2770 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, INQUIRY) < 0) { |
af73623f BS |
2771 | /* too large values might cause issues with arcmsr */ |
2772 | int vpd_buf_len = 64; | |
2773 | ||
66c28f97 MP |
2774 | sdev->no_report_opcodes = 1; |
2775 | ||
2776 | /* Disable WRITE SAME if REPORT SUPPORTED OPERATION | |
2777 | * CODES is unsupported and the device has an ATA | |
2778 | * Information VPD page (SAT). | |
2779 | */ | |
af73623f | 2780 | if (!scsi_get_vpd_page(sdev, 0x89, buffer, vpd_buf_len)) |
66c28f97 MP |
2781 | sdev->no_write_same = 1; |
2782 | } | |
2783 | ||
2784 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME_16) == 1) | |
5db44863 | 2785 | sdkp->ws16 = 1; |
66c28f97 MP |
2786 | |
2787 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME) == 1) | |
2788 | sdkp->ws10 = 1; | |
5db44863 MP |
2789 | } |
2790 | ||
1da177e4 LT |
2791 | /** |
2792 | * sd_revalidate_disk - called the first time a new disk is seen, | |
2793 | * performs disk spin up, read_capacity, etc. | |
2794 | * @disk: struct gendisk we care about | |
2795 | **/ | |
2796 | static int sd_revalidate_disk(struct gendisk *disk) | |
2797 | { | |
2798 | struct scsi_disk *sdkp = scsi_disk(disk); | |
2799 | struct scsi_device *sdp = sdkp->device; | |
ca369d51 | 2800 | struct request_queue *q = sdkp->disk->queue; |
1da177e4 | 2801 | unsigned char *buffer; |
ca369d51 | 2802 | unsigned int dev_max, rw_max; |
1da177e4 | 2803 | |
fa0d34be MP |
2804 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, |
2805 | "sd_revalidate_disk\n")); | |
1da177e4 LT |
2806 | |
2807 | /* | |
2808 | * If the device is offline, don't try and read capacity or any | |
2809 | * of the other niceties. | |
2810 | */ | |
2811 | if (!scsi_device_online(sdp)) | |
2812 | goto out; | |
2813 | ||
a6123f14 | 2814 | buffer = kmalloc(SD_BUF_SIZE, GFP_KERNEL); |
1da177e4 | 2815 | if (!buffer) { |
e73aec82 MP |
2816 | sd_printk(KERN_WARNING, sdkp, "sd_revalidate_disk: Memory " |
2817 | "allocation failure.\n"); | |
ea73a9f2 | 2818 | goto out; |
1da177e4 LT |
2819 | } |
2820 | ||
e73aec82 | 2821 | sd_spinup_disk(sdkp); |
1da177e4 LT |
2822 | |
2823 | /* | |
2824 | * Without media there is no reason to ask; moreover, some devices | |
2825 | * react badly if we do. | |
2826 | */ | |
2827 | if (sdkp->media_present) { | |
e73aec82 | 2828 | sd_read_capacity(sdkp, buffer); |
ffd4bc2a | 2829 | |
5ddfe085 | 2830 | if (scsi_device_supports_vpd(sdp)) { |
c98a0eb0 | 2831 | sd_read_block_provisioning(sdkp); |
ffd4bc2a MP |
2832 | sd_read_block_limits(sdkp); |
2833 | sd_read_block_characteristics(sdkp); | |
2834 | } | |
2835 | ||
e73aec82 MP |
2836 | sd_read_write_protect_flag(sdkp, buffer); |
2837 | sd_read_cache_type(sdkp, buffer); | |
e0597d70 | 2838 | sd_read_app_tag_own(sdkp, buffer); |
5db44863 | 2839 | sd_read_write_same(sdkp, buffer); |
1da177e4 | 2840 | } |
461d4e90 | 2841 | |
70a9b873 MP |
2842 | sdkp->first_scan = 0; |
2843 | ||
461d4e90 TH |
2844 | /* |
2845 | * We now have all cache related info, determine how we deal | |
4913efe4 | 2846 | * with flush requests. |
461d4e90 | 2847 | */ |
cb2fb68d | 2848 | sd_set_flush_flag(sdkp); |
461d4e90 | 2849 | |
ca369d51 MP |
2850 | /* Initial block count limit based on CDB TRANSFER LENGTH field size. */ |
2851 | dev_max = sdp->use_16_for_rw ? SD_MAX_XFER_BLOCKS : SD_DEF_XFER_BLOCKS; | |
2852 | ||
2853 | /* Some devices report a maximum block count for READ/WRITE requests. */ | |
2854 | dev_max = min_not_zero(dev_max, sdkp->max_xfer_blocks); | |
2855 | q->limits.max_dev_sectors = logical_to_sectors(sdp, dev_max); | |
2856 | ||
2857 | /* | |
2858 | * Use the device's preferred I/O size for reads and writes | |
9c1d9c20 MP |
2859 | * unless the reported value is unreasonably small, large, or |
2860 | * garbage. | |
ca369d51 | 2861 | */ |
9c1d9c20 MP |
2862 | if (sdkp->opt_xfer_blocks && |
2863 | sdkp->opt_xfer_blocks <= dev_max && | |
2864 | sdkp->opt_xfer_blocks <= SD_DEF_XFER_BLOCKS && | |
09cbfeaf | 2865 | sdkp->opt_xfer_blocks * sdp->sector_size >= PAGE_SIZE) |
ca369d51 | 2866 | rw_max = q->limits.io_opt = |
d0eb20a8 | 2867 | sdkp->opt_xfer_blocks * sdp->sector_size; |
ca369d51 MP |
2868 | else |
2869 | rw_max = BLK_DEF_MAX_SECTORS; | |
3a9794d3 | 2870 | |
ca369d51 MP |
2871 | /* Combine with controller limits */ |
2872 | q->limits.max_sectors = min(rw_max, queue_max_hw_sectors(q)); | |
4f258a46 | 2873 | |
f08bb1e0 | 2874 | set_capacity(disk, logical_to_sectors(sdp, sdkp->capacity)); |
5db44863 | 2875 | sd_config_write_same(sdkp); |
1da177e4 LT |
2876 | kfree(buffer); |
2877 | ||
1da177e4 LT |
2878 | out: |
2879 | return 0; | |
2880 | } | |
2881 | ||
72ec24bd TH |
2882 | /** |
2883 | * sd_unlock_native_capacity - unlock native capacity | |
2884 | * @disk: struct gendisk to set capacity for | |
2885 | * | |
2886 | * Block layer calls this function if it detects that partitions | |
2887 | * on @disk reach beyond the end of the device. If the SCSI host | |
2888 | * implements ->unlock_native_capacity() method, it's invoked to | |
2889 | * give it a chance to adjust the device capacity. | |
2890 | * | |
2891 | * CONTEXT: | |
2892 | * Defined by block layer. Might sleep. | |
2893 | */ | |
2894 | static void sd_unlock_native_capacity(struct gendisk *disk) | |
2895 | { | |
2896 | struct scsi_device *sdev = scsi_disk(disk)->device; | |
2897 | ||
2898 | if (sdev->host->hostt->unlock_native_capacity) | |
2899 | sdev->host->hostt->unlock_native_capacity(sdev); | |
2900 | } | |
2901 | ||
3e1a7ff8 TH |
2902 | /** |
2903 | * sd_format_disk_name - format disk name | |
2904 | * @prefix: name prefix - ie. "sd" for SCSI disks | |
2905 | * @index: index of the disk to format name for | |
2906 | * @buf: output buffer | |
2907 | * @buflen: length of the output buffer | |
2908 | * | |
2909 | * SCSI disk names starts at sda. The 26th device is sdz and the | |
2910 | * 27th is sdaa. The last one for two lettered suffix is sdzz | |
2911 | * which is followed by sdaaa. | |
2912 | * | |
2913 | * This is basically 26 base counting with one extra 'nil' entry | |
3ad2f3fb | 2914 | * at the beginning from the second digit on and can be |
3e1a7ff8 TH |
2915 | * determined using similar method as 26 base conversion with the |
2916 | * index shifted -1 after each digit is computed. | |
2917 | * | |
2918 | * CONTEXT: | |
2919 | * Don't care. | |
2920 | * | |
2921 | * RETURNS: | |
2922 | * 0 on success, -errno on failure. | |
2923 | */ | |
2924 | static int sd_format_disk_name(char *prefix, int index, char *buf, int buflen) | |
2925 | { | |
2926 | const int base = 'z' - 'a' + 1; | |
2927 | char *begin = buf + strlen(prefix); | |
2928 | char *end = buf + buflen; | |
2929 | char *p; | |
2930 | int unit; | |
2931 | ||
2932 | p = end - 1; | |
2933 | *p = '\0'; | |
2934 | unit = base; | |
2935 | do { | |
2936 | if (p == begin) | |
2937 | return -EINVAL; | |
2938 | *--p = 'a' + (index % unit); | |
2939 | index = (index / unit) - 1; | |
2940 | } while (index >= 0); | |
2941 | ||
2942 | memmove(begin, p, end - p); | |
2943 | memcpy(buf, prefix, strlen(prefix)); | |
2944 | ||
2945 | return 0; | |
2946 | } | |
2947 | ||
4ace92fc AV |
2948 | /* |
2949 | * The asynchronous part of sd_probe | |
2950 | */ | |
2951 | static void sd_probe_async(void *data, async_cookie_t cookie) | |
2952 | { | |
2953 | struct scsi_disk *sdkp = data; | |
2954 | struct scsi_device *sdp; | |
2955 | struct gendisk *gd; | |
2956 | u32 index; | |
2957 | struct device *dev; | |
2958 | ||
2959 | sdp = sdkp->device; | |
2960 | gd = sdkp->disk; | |
2961 | index = sdkp->index; | |
2962 | dev = &sdp->sdev_gendev; | |
2963 | ||
1a03ae0f MR |
2964 | gd->major = sd_major((index & 0xf0) >> 4); |
2965 | gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00); | |
2966 | gd->minors = SD_MINORS; | |
2967 | ||
4ace92fc AV |
2968 | gd->fops = &sd_fops; |
2969 | gd->private_data = &sdkp->driver; | |
2970 | gd->queue = sdkp->device->request_queue; | |
2971 | ||
70a9b873 MP |
2972 | /* defaults, until the device tells us otherwise */ |
2973 | sdp->sector_size = 512; | |
2974 | sdkp->capacity = 0; | |
2975 | sdkp->media_present = 1; | |
2976 | sdkp->write_prot = 0; | |
39c60a09 | 2977 | sdkp->cache_override = 0; |
70a9b873 MP |
2978 | sdkp->WCE = 0; |
2979 | sdkp->RCD = 0; | |
2980 | sdkp->ATO = 0; | |
2981 | sdkp->first_scan = 1; | |
18a4d0a2 | 2982 | sdkp->max_medium_access_timeouts = SD_MAX_MEDIUM_TIMEOUTS; |
70a9b873 | 2983 | |
4ace92fc AV |
2984 | sd_revalidate_disk(gd); |
2985 | ||
4ace92fc | 2986 | gd->driverfs_dev = &sdp->sdev_gendev; |
97fedbbe | 2987 | gd->flags = GENHD_FL_EXT_DEVT; |
2bae0093 | 2988 | if (sdp->removable) { |
4ace92fc | 2989 | gd->flags |= GENHD_FL_REMOVABLE; |
2bae0093 TH |
2990 | gd->events |= DISK_EVENT_MEDIA_CHANGE; |
2991 | } | |
4ace92fc | 2992 | |
10c580e4 | 2993 | blk_pm_runtime_init(sdp->request_queue, dev); |
4ace92fc | 2994 | add_disk(gd); |
fe542396 MP |
2995 | if (sdkp->capacity) |
2996 | sd_dif_config_host(sdkp); | |
4ace92fc | 2997 | |
3821d768 MP |
2998 | sd_revalidate_disk(gd); |
2999 | ||
4ace92fc AV |
3000 | sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n", |
3001 | sdp->removable ? "removable " : ""); | |
478a8a05 | 3002 | scsi_autopm_put_device(sdp); |
ea038f63 | 3003 | put_device(&sdkp->dev); |
4ace92fc AV |
3004 | } |
3005 | ||
1da177e4 LT |
3006 | /** |
3007 | * sd_probe - called during driver initialization and whenever a | |
3008 | * new scsi device is attached to the system. It is called once | |
3009 | * for each scsi device (not just disks) present. | |
3010 | * @dev: pointer to device object | |
3011 | * | |
3012 | * Returns 0 if successful (or not interested in this scsi device | |
3013 | * (e.g. scanner)); 1 when there is an error. | |
3014 | * | |
3015 | * Note: this function is invoked from the scsi mid-level. | |
3016 | * This function sets up the mapping between a given | |
3017 | * <host,channel,id,lun> (found in sdp) and new device name | |
3018 | * (e.g. /dev/sda). More precisely it is the block device major | |
3019 | * and minor number that is chosen here. | |
3020 | * | |
2db93ce8 PU |
3021 | * Assume sd_probe is not re-entrant (for time being) |
3022 | * Also think about sd_probe() and sd_remove() running coincidentally. | |
1da177e4 LT |
3023 | **/ |
3024 | static int sd_probe(struct device *dev) | |
3025 | { | |
3026 | struct scsi_device *sdp = to_scsi_device(dev); | |
3027 | struct scsi_disk *sdkp; | |
3028 | struct gendisk *gd; | |
439d77f7 | 3029 | int index; |
1da177e4 LT |
3030 | int error; |
3031 | ||
6fe8c1db | 3032 | scsi_autopm_get_device(sdp); |
1da177e4 | 3033 | error = -ENODEV; |
631e8a13 | 3034 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_MOD && sdp->type != TYPE_RBC) |
1da177e4 LT |
3035 | goto out; |
3036 | ||
9ccfc756 | 3037 | SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO, sdp, |
2db93ce8 | 3038 | "sd_probe\n")); |
1da177e4 LT |
3039 | |
3040 | error = -ENOMEM; | |
24669f75 | 3041 | sdkp = kzalloc(sizeof(*sdkp), GFP_KERNEL); |
1da177e4 LT |
3042 | if (!sdkp) |
3043 | goto out; | |
3044 | ||
689d6fac | 3045 | gd = alloc_disk(SD_MINORS); |
1da177e4 LT |
3046 | if (!gd) |
3047 | goto out_free; | |
3048 | ||
f27bac27 TH |
3049 | do { |
3050 | if (!ida_pre_get(&sd_index_ida, GFP_KERNEL)) | |
3051 | goto out_put; | |
1da177e4 | 3052 | |
4034cc68 | 3053 | spin_lock(&sd_index_lock); |
f27bac27 | 3054 | error = ida_get_new(&sd_index_ida, &index); |
4034cc68 | 3055 | spin_unlock(&sd_index_lock); |
f27bac27 | 3056 | } while (error == -EAGAIN); |
1da177e4 | 3057 | |
21208ae5 DK |
3058 | if (error) { |
3059 | sdev_printk(KERN_WARNING, sdp, "sd_probe: memory exhausted.\n"); | |
1da177e4 | 3060 | goto out_put; |
1a03ae0f MR |
3061 | } |
3062 | ||
3e1a7ff8 | 3063 | error = sd_format_disk_name("sd", index, gd->disk_name, DISK_NAME_LEN); |
21208ae5 DK |
3064 | if (error) { |
3065 | sdev_printk(KERN_WARNING, sdp, "SCSI disk (sd) name length exceeded.\n"); | |
f27bac27 | 3066 | goto out_free_index; |
21208ae5 | 3067 | } |
f27bac27 | 3068 | |
1da177e4 LT |
3069 | sdkp->device = sdp; |
3070 | sdkp->driver = &sd_template; | |
3071 | sdkp->disk = gd; | |
3072 | sdkp->index = index; | |
409f3499 | 3073 | atomic_set(&sdkp->openers, 0); |
9e1a1537 | 3074 | atomic_set(&sdkp->device->ioerr_cnt, 0); |
1da177e4 | 3075 | |
601e7638 JB |
3076 | if (!sdp->request_queue->rq_timeout) { |
3077 | if (sdp->type != TYPE_MOD) | |
3078 | blk_queue_rq_timeout(sdp->request_queue, SD_TIMEOUT); | |
3079 | else | |
3080 | blk_queue_rq_timeout(sdp->request_queue, | |
3081 | SD_MOD_TIMEOUT); | |
3082 | } | |
3083 | ||
3084 | device_initialize(&sdkp->dev); | |
478a8a05 | 3085 | sdkp->dev.parent = dev; |
601e7638 | 3086 | sdkp->dev.class = &sd_disk_class; |
02aa2a37 | 3087 | dev_set_name(&sdkp->dev, "%s", dev_name(dev)); |
601e7638 | 3088 | |
dee0586e DC |
3089 | error = device_add(&sdkp->dev); |
3090 | if (error) | |
601e7638 JB |
3091 | goto out_free_index; |
3092 | ||
478a8a05 AS |
3093 | get_device(dev); |
3094 | dev_set_drvdata(dev, sdkp); | |
601e7638 | 3095 | |
ea038f63 | 3096 | get_device(&sdkp->dev); /* prevent release before async_schedule */ |
a7a20d10 | 3097 | async_schedule_domain(sd_probe_async, sdkp, &scsi_sd_probe_domain); |
1da177e4 LT |
3098 | |
3099 | return 0; | |
3100 | ||
f27bac27 | 3101 | out_free_index: |
4034cc68 | 3102 | spin_lock(&sd_index_lock); |
f27bac27 | 3103 | ida_remove(&sd_index_ida, index); |
4034cc68 | 3104 | spin_unlock(&sd_index_lock); |
6bdaa1f1 | 3105 | out_put: |
1da177e4 | 3106 | put_disk(gd); |
6bdaa1f1 | 3107 | out_free: |
1da177e4 | 3108 | kfree(sdkp); |
6bdaa1f1 | 3109 | out: |
6fe8c1db | 3110 | scsi_autopm_put_device(sdp); |
1da177e4 LT |
3111 | return error; |
3112 | } | |
3113 | ||
3114 | /** | |
3115 | * sd_remove - called whenever a scsi disk (previously recognized by | |
3116 | * sd_probe) is detached from the system. It is called (potentially | |
3117 | * multiple times) during sd module unload. | |
3118 | * @sdp: pointer to mid level scsi device object | |
3119 | * | |
3120 | * Note: this function is invoked from the scsi mid-level. | |
3121 | * This function potentially frees up a device name (e.g. /dev/sdc) | |
3122 | * that could be re-used by a subsequent sd_probe(). | |
3123 | * This function is not called when the built-in sd driver is "exit-ed". | |
3124 | **/ | |
3125 | static int sd_remove(struct device *dev) | |
3126 | { | |
601e7638 | 3127 | struct scsi_disk *sdkp; |
0761df9c | 3128 | dev_t devt; |
1da177e4 | 3129 | |
601e7638 | 3130 | sdkp = dev_get_drvdata(dev); |
0761df9c | 3131 | devt = disk_devt(sdkp->disk); |
478a8a05 AS |
3132 | scsi_autopm_get_device(sdkp->device); |
3133 | ||
3c31b52f | 3134 | async_synchronize_full_domain(&scsi_sd_pm_domain); |
a7a20d10 | 3135 | async_synchronize_full_domain(&scsi_sd_probe_domain); |
ee959b00 | 3136 | device_del(&sdkp->dev); |
1da177e4 LT |
3137 | del_gendisk(sdkp->disk); |
3138 | sd_shutdown(dev); | |
39b7f1e2 | 3139 | |
0761df9c HR |
3140 | blk_register_region(devt, SD_MINORS, NULL, |
3141 | sd_default_probe, NULL, NULL); | |
3142 | ||
0b950672 | 3143 | mutex_lock(&sd_ref_mutex); |
39b7f1e2 | 3144 | dev_set_drvdata(dev, NULL); |
ee959b00 | 3145 | put_device(&sdkp->dev); |
0b950672 | 3146 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
3147 | |
3148 | return 0; | |
3149 | } | |
3150 | ||
3151 | /** | |
3152 | * scsi_disk_release - Called to free the scsi_disk structure | |
ee959b00 | 3153 | * @dev: pointer to embedded class device |
1da177e4 | 3154 | * |
0b950672 | 3155 | * sd_ref_mutex must be held entering this routine. Because it is |
1da177e4 LT |
3156 | * called on last put, you should always use the scsi_disk_get() |
3157 | * scsi_disk_put() helpers which manipulate the semaphore directly | |
ee959b00 | 3158 | * and never do a direct put_device. |
1da177e4 | 3159 | **/ |
ee959b00 | 3160 | static void scsi_disk_release(struct device *dev) |
1da177e4 | 3161 | { |
ee959b00 | 3162 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
1da177e4 LT |
3163 | struct gendisk *disk = sdkp->disk; |
3164 | ||
4034cc68 | 3165 | spin_lock(&sd_index_lock); |
f27bac27 | 3166 | ida_remove(&sd_index_ida, sdkp->index); |
4034cc68 | 3167 | spin_unlock(&sd_index_lock); |
1da177e4 LT |
3168 | |
3169 | disk->private_data = NULL; | |
1da177e4 | 3170 | put_disk(disk); |
39b7f1e2 | 3171 | put_device(&sdkp->device->sdev_gendev); |
1da177e4 LT |
3172 | |
3173 | kfree(sdkp); | |
3174 | } | |
3175 | ||
cc5d2c8c | 3176 | static int sd_start_stop_device(struct scsi_disk *sdkp, int start) |
c3c94c5a TH |
3177 | { |
3178 | unsigned char cmd[6] = { START_STOP }; /* START_VALID */ | |
3179 | struct scsi_sense_hdr sshdr; | |
cc5d2c8c | 3180 | struct scsi_device *sdp = sdkp->device; |
c3c94c5a TH |
3181 | int res; |
3182 | ||
3183 | if (start) | |
3184 | cmd[4] |= 1; /* START */ | |
3185 | ||
d2886ea3 SR |
3186 | if (sdp->start_stop_pwr_cond) |
3187 | cmd[4] |= start ? 1 << 4 : 3 << 4; /* Active or Standby */ | |
3188 | ||
c3c94c5a TH |
3189 | if (!scsi_device_online(sdp)) |
3190 | return -ENODEV; | |
3191 | ||
9b21493c LM |
3192 | res = scsi_execute_req_flags(sdp, cmd, DMA_NONE, NULL, 0, &sshdr, |
3193 | SD_TIMEOUT, SD_MAX_RETRIES, NULL, REQ_PM); | |
c3c94c5a | 3194 | if (res) { |
ef61329d | 3195 | sd_print_result(sdkp, "Start/Stop Unit failed", res); |
c3c94c5a | 3196 | if (driver_byte(res) & DRIVER_SENSE) |
cc5d2c8c | 3197 | sd_print_sense_hdr(sdkp, &sshdr); |
95897910 ON |
3198 | if (scsi_sense_valid(&sshdr) && |
3199 | /* 0x3a is medium not present */ | |
3200 | sshdr.asc == 0x3a) | |
3201 | res = 0; | |
c3c94c5a TH |
3202 | } |
3203 | ||
95897910 ON |
3204 | /* SCSI error codes must not go to the generic layer */ |
3205 | if (res) | |
3206 | return -EIO; | |
3207 | ||
3208 | return 0; | |
c3c94c5a TH |
3209 | } |
3210 | ||
1da177e4 LT |
3211 | /* |
3212 | * Send a SYNCHRONIZE CACHE instruction down to the device through | |
3213 | * the normal SCSI command structure. Wait for the command to | |
3214 | * complete. | |
3215 | */ | |
3216 | static void sd_shutdown(struct device *dev) | |
3217 | { | |
3d9a1f53 | 3218 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
1da177e4 LT |
3219 | |
3220 | if (!sdkp) | |
3221 | return; /* this can happen */ | |
3222 | ||
54f57588 | 3223 | if (pm_runtime_suspended(dev)) |
3d9a1f53 | 3224 | return; |
54f57588 | 3225 | |
95897910 | 3226 | if (sdkp->WCE && sdkp->media_present) { |
e73aec82 MP |
3227 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
3228 | sd_sync_cache(sdkp); | |
39b7f1e2 | 3229 | } |
c3c94c5a | 3230 | |
cc5d2c8c JB |
3231 | if (system_state != SYSTEM_RESTART && sdkp->device->manage_start_stop) { |
3232 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); | |
3233 | sd_start_stop_device(sdkp, 0); | |
c3c94c5a | 3234 | } |
39b7f1e2 | 3235 | } |
1da177e4 | 3236 | |
95897910 | 3237 | static int sd_suspend_common(struct device *dev, bool ignore_stop_errors) |
c3c94c5a | 3238 | { |
3d9a1f53 | 3239 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
09ff92fe | 3240 | int ret = 0; |
c3c94c5a | 3241 | |
13b43891 AS |
3242 | if (!sdkp) /* E.g.: runtime suspend following sd_remove() */ |
3243 | return 0; | |
c3c94c5a | 3244 | |
95897910 | 3245 | if (sdkp->WCE && sdkp->media_present) { |
cc5d2c8c | 3246 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
c3c94c5a | 3247 | ret = sd_sync_cache(sdkp); |
95897910 ON |
3248 | if (ret) { |
3249 | /* ignore OFFLINE device */ | |
3250 | if (ret == -ENODEV) | |
3251 | ret = 0; | |
09ff92fe | 3252 | goto done; |
95897910 | 3253 | } |
c3c94c5a TH |
3254 | } |
3255 | ||
691e3d31 | 3256 | if (sdkp->device->manage_start_stop) { |
cc5d2c8c | 3257 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); |
95897910 | 3258 | /* an error is not worth aborting a system sleep */ |
cc5d2c8c | 3259 | ret = sd_start_stop_device(sdkp, 0); |
95897910 ON |
3260 | if (ignore_stop_errors) |
3261 | ret = 0; | |
c3c94c5a TH |
3262 | } |
3263 | ||
09ff92fe | 3264 | done: |
09ff92fe | 3265 | return ret; |
c3c94c5a TH |
3266 | } |
3267 | ||
95897910 ON |
3268 | static int sd_suspend_system(struct device *dev) |
3269 | { | |
3270 | return sd_suspend_common(dev, true); | |
3271 | } | |
3272 | ||
3273 | static int sd_suspend_runtime(struct device *dev) | |
3274 | { | |
3275 | return sd_suspend_common(dev, false); | |
3276 | } | |
3277 | ||
c3c94c5a TH |
3278 | static int sd_resume(struct device *dev) |
3279 | { | |
3d9a1f53 | 3280 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
c3c94c5a | 3281 | |
13b43891 AS |
3282 | if (!sdkp) /* E.g.: runtime resume at the start of sd_probe() */ |
3283 | return 0; | |
3284 | ||
cc5d2c8c | 3285 | if (!sdkp->device->manage_start_stop) |
3d9a1f53 | 3286 | return 0; |
c3c94c5a | 3287 | |
cc5d2c8c | 3288 | sd_printk(KERN_NOTICE, sdkp, "Starting disk\n"); |
3d9a1f53 | 3289 | return sd_start_stop_device(sdkp, 1); |
c3c94c5a TH |
3290 | } |
3291 | ||
1da177e4 LT |
3292 | /** |
3293 | * init_sd - entry point for this driver (both when built in or when | |
3294 | * a module). | |
3295 | * | |
3296 | * Note: this function registers this driver with the scsi mid-level. | |
3297 | **/ | |
3298 | static int __init init_sd(void) | |
3299 | { | |
5e4009ba | 3300 | int majors = 0, i, err; |
1da177e4 LT |
3301 | |
3302 | SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n")); | |
3303 | ||
0761df9c HR |
3304 | for (i = 0; i < SD_MAJORS; i++) { |
3305 | if (register_blkdev(sd_major(i), "sd") != 0) | |
3306 | continue; | |
3307 | majors++; | |
3308 | blk_register_region(sd_major(i), SD_MINORS, NULL, | |
3309 | sd_default_probe, NULL, NULL); | |
3310 | } | |
1da177e4 LT |
3311 | |
3312 | if (!majors) | |
3313 | return -ENODEV; | |
3314 | ||
5e4009ba JG |
3315 | err = class_register(&sd_disk_class); |
3316 | if (err) | |
3317 | goto err_out; | |
6bdaa1f1 | 3318 | |
4e7392ec MP |
3319 | sd_cdb_cache = kmem_cache_create("sd_ext_cdb", SD_EXT_CDB_SIZE, |
3320 | 0, 0, NULL); | |
3321 | if (!sd_cdb_cache) { | |
3322 | printk(KERN_ERR "sd: can't init extended cdb cache\n"); | |
8d964478 | 3323 | err = -ENOMEM; |
4e7392ec MP |
3324 | goto err_out_class; |
3325 | } | |
3326 | ||
3327 | sd_cdb_pool = mempool_create_slab_pool(SD_MEMPOOL_SIZE, sd_cdb_cache); | |
3328 | if (!sd_cdb_pool) { | |
3329 | printk(KERN_ERR "sd: can't init extended cdb pool\n"); | |
8d964478 | 3330 | err = -ENOMEM; |
4e7392ec MP |
3331 | goto err_out_cache; |
3332 | } | |
3333 | ||
afd5e34b JD |
3334 | err = scsi_register_driver(&sd_template.gendrv); |
3335 | if (err) | |
3336 | goto err_out_driver; | |
3337 | ||
5e4009ba JG |
3338 | return 0; |
3339 | ||
afd5e34b JD |
3340 | err_out_driver: |
3341 | mempool_destroy(sd_cdb_pool); | |
3342 | ||
4e7392ec MP |
3343 | err_out_cache: |
3344 | kmem_cache_destroy(sd_cdb_cache); | |
3345 | ||
5e4009ba JG |
3346 | err_out_class: |
3347 | class_unregister(&sd_disk_class); | |
3348 | err_out: | |
3349 | for (i = 0; i < SD_MAJORS; i++) | |
3350 | unregister_blkdev(sd_major(i), "sd"); | |
3351 | return err; | |
1da177e4 LT |
3352 | } |
3353 | ||
3354 | /** | |
3355 | * exit_sd - exit point for this driver (when it is a module). | |
3356 | * | |
3357 | * Note: this function unregisters this driver from the scsi mid-level. | |
3358 | **/ | |
3359 | static void __exit exit_sd(void) | |
3360 | { | |
3361 | int i; | |
3362 | ||
3363 | SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n")); | |
3364 | ||
afd5e34b | 3365 | scsi_unregister_driver(&sd_template.gendrv); |
4e7392ec MP |
3366 | mempool_destroy(sd_cdb_pool); |
3367 | kmem_cache_destroy(sd_cdb_cache); | |
3368 | ||
5e4009ba JG |
3369 | class_unregister(&sd_disk_class); |
3370 | ||
0761df9c HR |
3371 | for (i = 0; i < SD_MAJORS; i++) { |
3372 | blk_unregister_region(sd_major(i), SD_MINORS); | |
1da177e4 | 3373 | unregister_blkdev(sd_major(i), "sd"); |
0761df9c | 3374 | } |
1da177e4 LT |
3375 | } |
3376 | ||
1da177e4 LT |
3377 | module_init(init_sd); |
3378 | module_exit(exit_sd); | |
e73aec82 MP |
3379 | |
3380 | static void sd_print_sense_hdr(struct scsi_disk *sdkp, | |
3381 | struct scsi_sense_hdr *sshdr) | |
3382 | { | |
21045519 HR |
3383 | scsi_print_sense_hdr(sdkp->device, |
3384 | sdkp->disk ? sdkp->disk->disk_name : NULL, sshdr); | |
e73aec82 MP |
3385 | } |
3386 | ||
ef61329d HR |
3387 | static void sd_print_result(const struct scsi_disk *sdkp, const char *msg, |
3388 | int result) | |
e73aec82 | 3389 | { |
ef61329d HR |
3390 | const char *hb_string = scsi_hostbyte_string(result); |
3391 | const char *db_string = scsi_driverbyte_string(result); | |
3392 | ||
3393 | if (hb_string || db_string) | |
3394 | sd_printk(KERN_INFO, sdkp, | |
3395 | "%s: Result: hostbyte=%s driverbyte=%s\n", msg, | |
3396 | hb_string ? hb_string : "invalid", | |
3397 | db_string ? db_string : "invalid"); | |
3398 | else | |
3399 | sd_printk(KERN_INFO, sdkp, | |
3400 | "%s: Result: hostbyte=0x%02x driverbyte=0x%02x\n", | |
3401 | msg, host_byte(result), driver_byte(result)); | |
e73aec82 MP |
3402 | } |
3403 |