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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> |
1da177e4 | 54 | #include <asm/uaccess.h> |
8f76d151 | 55 | #include <asm/unaligned.h> |
1da177e4 LT |
56 | |
57 | #include <scsi/scsi.h> | |
58 | #include <scsi/scsi_cmnd.h> | |
59 | #include <scsi/scsi_dbg.h> | |
60 | #include <scsi/scsi_device.h> | |
61 | #include <scsi/scsi_driver.h> | |
62 | #include <scsi/scsi_eh.h> | |
63 | #include <scsi/scsi_host.h> | |
64 | #include <scsi/scsi_ioctl.h> | |
1da177e4 LT |
65 | #include <scsi/scsicam.h> |
66 | ||
aa91696e | 67 | #include "sd.h" |
a7a20d10 | 68 | #include "scsi_priv.h" |
1da177e4 LT |
69 | #include "scsi_logging.h" |
70 | ||
f018fa55 RH |
71 | MODULE_AUTHOR("Eric Youngdale"); |
72 | MODULE_DESCRIPTION("SCSI disk (sd) driver"); | |
73 | MODULE_LICENSE("GPL"); | |
74 | ||
75 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK0_MAJOR); | |
76 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK1_MAJOR); | |
77 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK2_MAJOR); | |
78 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK3_MAJOR); | |
79 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK4_MAJOR); | |
80 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK5_MAJOR); | |
81 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK6_MAJOR); | |
82 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK7_MAJOR); | |
83 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK8_MAJOR); | |
84 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK9_MAJOR); | |
85 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK10_MAJOR); | |
86 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK11_MAJOR); | |
87 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK12_MAJOR); | |
88 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK13_MAJOR); | |
89 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK14_MAJOR); | |
90 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK15_MAJOR); | |
d7b8bcb0 MT |
91 | MODULE_ALIAS_SCSI_DEVICE(TYPE_DISK); |
92 | MODULE_ALIAS_SCSI_DEVICE(TYPE_MOD); | |
93 | MODULE_ALIAS_SCSI_DEVICE(TYPE_RBC); | |
f018fa55 | 94 | |
870d6656 | 95 | #if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT) |
f615b48c | 96 | #define SD_MINORS 16 |
870d6656 | 97 | #else |
3e1a7ff8 | 98 | #define SD_MINORS 0 |
870d6656 TH |
99 | #endif |
100 | ||
c98a0eb0 | 101 | static void sd_config_discard(struct scsi_disk *, unsigned int); |
5db44863 | 102 | static void sd_config_write_same(struct scsi_disk *); |
7b3d9545 | 103 | static int sd_revalidate_disk(struct gendisk *); |
72ec24bd | 104 | static void sd_unlock_native_capacity(struct gendisk *disk); |
7b3d9545 LT |
105 | static int sd_probe(struct device *); |
106 | static int sd_remove(struct device *); | |
107 | static void sd_shutdown(struct device *); | |
95897910 ON |
108 | static int sd_suspend_system(struct device *); |
109 | static int sd_suspend_runtime(struct device *); | |
7b3d9545 LT |
110 | static int sd_resume(struct device *); |
111 | static void sd_rescan(struct device *); | |
a1b73fc1 CH |
112 | static int sd_init_command(struct scsi_cmnd *SCpnt); |
113 | static void sd_uninit_command(struct scsi_cmnd *SCpnt); | |
7b3d9545 | 114 | static int sd_done(struct scsi_cmnd *); |
2451079b | 115 | static int sd_eh_action(struct scsi_cmnd *, int); |
7b3d9545 | 116 | static void sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer); |
ee959b00 | 117 | static void scsi_disk_release(struct device *cdev); |
7b3d9545 LT |
118 | static void sd_print_sense_hdr(struct scsi_disk *, struct scsi_sense_hdr *); |
119 | static void sd_print_result(struct scsi_disk *, int); | |
120 | ||
4034cc68 | 121 | static DEFINE_SPINLOCK(sd_index_lock); |
f27bac27 | 122 | static DEFINE_IDA(sd_index_ida); |
1da177e4 LT |
123 | |
124 | /* This semaphore is used to mediate the 0->1 reference get in the | |
125 | * face of object destruction (i.e. we can't allow a get on an | |
126 | * object after last put) */ | |
0b950672 | 127 | static DEFINE_MUTEX(sd_ref_mutex); |
1da177e4 | 128 | |
439d77f7 HS |
129 | static struct kmem_cache *sd_cdb_cache; |
130 | static mempool_t *sd_cdb_pool; | |
4e7392ec | 131 | |
6bdaa1f1 JB |
132 | static const char *sd_cache_types[] = { |
133 | "write through", "none", "write back", | |
134 | "write back, no read (daft)" | |
135 | }; | |
136 | ||
cb2fb68d VC |
137 | static void sd_set_flush_flag(struct scsi_disk *sdkp) |
138 | { | |
139 | unsigned flush = 0; | |
140 | ||
141 | if (sdkp->WCE) { | |
142 | flush |= REQ_FLUSH; | |
143 | if (sdkp->DPOFUA) | |
144 | flush |= REQ_FUA; | |
145 | } | |
146 | ||
147 | blk_queue_flush(sdkp->disk->queue, flush); | |
148 | } | |
149 | ||
ee959b00 | 150 | static ssize_t |
e1ea2351 GKH |
151 | cache_type_store(struct device *dev, struct device_attribute *attr, |
152 | const char *buf, size_t count) | |
6bdaa1f1 JB |
153 | { |
154 | int i, ct = -1, rcd, wce, sp; | |
ee959b00 | 155 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
156 | struct scsi_device *sdp = sdkp->device; |
157 | char buffer[64]; | |
158 | char *buffer_data; | |
159 | struct scsi_mode_data data; | |
160 | struct scsi_sense_hdr sshdr; | |
2ee3e26c | 161 | static const char temp[] = "temporary "; |
6bdaa1f1 JB |
162 | int len; |
163 | ||
164 | if (sdp->type != TYPE_DISK) | |
165 | /* no cache control on RBC devices; theoretically they | |
166 | * can do it, but there's probably so many exceptions | |
167 | * it's not worth the risk */ | |
168 | return -EINVAL; | |
169 | ||
39c60a09 JB |
170 | if (strncmp(buf, temp, sizeof(temp) - 1) == 0) { |
171 | buf += sizeof(temp) - 1; | |
172 | sdkp->cache_override = 1; | |
173 | } else { | |
174 | sdkp->cache_override = 0; | |
175 | } | |
176 | ||
6391a113 | 177 | for (i = 0; i < ARRAY_SIZE(sd_cache_types); i++) { |
439d77f7 | 178 | len = strlen(sd_cache_types[i]); |
6bdaa1f1 JB |
179 | if (strncmp(sd_cache_types[i], buf, len) == 0 && |
180 | buf[len] == '\n') { | |
181 | ct = i; | |
182 | break; | |
183 | } | |
184 | } | |
185 | if (ct < 0) | |
186 | return -EINVAL; | |
187 | rcd = ct & 0x01 ? 1 : 0; | |
2eefd57b | 188 | wce = (ct & 0x02) && !sdkp->write_prot ? 1 : 0; |
39c60a09 JB |
189 | |
190 | if (sdkp->cache_override) { | |
191 | sdkp->WCE = wce; | |
192 | sdkp->RCD = rcd; | |
cb2fb68d | 193 | sd_set_flush_flag(sdkp); |
39c60a09 JB |
194 | return count; |
195 | } | |
196 | ||
6bdaa1f1 JB |
197 | if (scsi_mode_sense(sdp, 0x08, 8, buffer, sizeof(buffer), SD_TIMEOUT, |
198 | SD_MAX_RETRIES, &data, NULL)) | |
199 | return -EINVAL; | |
a9312fb8 | 200 | len = min_t(size_t, sizeof(buffer), data.length - data.header_length - |
6bdaa1f1 JB |
201 | data.block_descriptor_length); |
202 | buffer_data = buffer + data.header_length + | |
203 | data.block_descriptor_length; | |
204 | buffer_data[2] &= ~0x05; | |
205 | buffer_data[2] |= wce << 2 | rcd; | |
206 | sp = buffer_data[0] & 0x80 ? 1 : 0; | |
207 | ||
208 | if (scsi_mode_select(sdp, 1, sp, 8, buffer_data, len, SD_TIMEOUT, | |
209 | SD_MAX_RETRIES, &data, &sshdr)) { | |
210 | if (scsi_sense_valid(&sshdr)) | |
e73aec82 | 211 | sd_print_sense_hdr(sdkp, &sshdr); |
6bdaa1f1 JB |
212 | return -EINVAL; |
213 | } | |
f98a8cae | 214 | revalidate_disk(sdkp->disk); |
6bdaa1f1 JB |
215 | return count; |
216 | } | |
217 | ||
ee959b00 | 218 | static ssize_t |
e1ea2351 GKH |
219 | manage_start_stop_show(struct device *dev, struct device_attribute *attr, |
220 | char *buf) | |
221 | { | |
222 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
223 | struct scsi_device *sdp = sdkp->device; | |
224 | ||
225 | return snprintf(buf, 20, "%u\n", sdp->manage_start_stop); | |
226 | } | |
227 | ||
228 | static ssize_t | |
229 | manage_start_stop_store(struct device *dev, struct device_attribute *attr, | |
230 | const char *buf, size_t count) | |
c3c94c5a | 231 | { |
ee959b00 | 232 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
c3c94c5a TH |
233 | struct scsi_device *sdp = sdkp->device; |
234 | ||
235 | if (!capable(CAP_SYS_ADMIN)) | |
236 | return -EACCES; | |
237 | ||
238 | sdp->manage_start_stop = simple_strtoul(buf, NULL, 10); | |
239 | ||
240 | return count; | |
241 | } | |
e1ea2351 | 242 | static DEVICE_ATTR_RW(manage_start_stop); |
c3c94c5a | 243 | |
ee959b00 | 244 | static ssize_t |
e1ea2351 GKH |
245 | allow_restart_show(struct device *dev, struct device_attribute *attr, char *buf) |
246 | { | |
247 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
248 | ||
249 | return snprintf(buf, 40, "%d\n", sdkp->device->allow_restart); | |
250 | } | |
251 | ||
252 | static ssize_t | |
253 | allow_restart_store(struct device *dev, struct device_attribute *attr, | |
254 | const char *buf, size_t count) | |
a144c5ae | 255 | { |
ee959b00 | 256 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
a144c5ae BK |
257 | struct scsi_device *sdp = sdkp->device; |
258 | ||
259 | if (!capable(CAP_SYS_ADMIN)) | |
260 | return -EACCES; | |
261 | ||
262 | if (sdp->type != TYPE_DISK) | |
263 | return -EINVAL; | |
264 | ||
265 | sdp->allow_restart = simple_strtoul(buf, NULL, 10); | |
266 | ||
267 | return count; | |
268 | } | |
e1ea2351 | 269 | static DEVICE_ATTR_RW(allow_restart); |
a144c5ae | 270 | |
ee959b00 | 271 | static ssize_t |
e1ea2351 | 272 | cache_type_show(struct device *dev, struct device_attribute *attr, char *buf) |
6bdaa1f1 | 273 | { |
ee959b00 | 274 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
275 | int ct = sdkp->RCD + 2*sdkp->WCE; |
276 | ||
277 | return snprintf(buf, 40, "%s\n", sd_cache_types[ct]); | |
278 | } | |
e1ea2351 | 279 | static DEVICE_ATTR_RW(cache_type); |
6bdaa1f1 | 280 | |
ee959b00 | 281 | static ssize_t |
e1ea2351 | 282 | FUA_show(struct device *dev, struct device_attribute *attr, char *buf) |
6bdaa1f1 | 283 | { |
ee959b00 | 284 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
285 | |
286 | return snprintf(buf, 20, "%u\n", sdkp->DPOFUA); | |
287 | } | |
e1ea2351 | 288 | static DEVICE_ATTR_RO(FUA); |
6bdaa1f1 | 289 | |
ee959b00 | 290 | static ssize_t |
e1ea2351 GKH |
291 | protection_type_show(struct device *dev, struct device_attribute *attr, |
292 | char *buf) | |
e0597d70 MP |
293 | { |
294 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
295 | ||
296 | return snprintf(buf, 20, "%u\n", sdkp->protection_type); | |
297 | } | |
298 | ||
8172499a | 299 | static ssize_t |
e1ea2351 GKH |
300 | protection_type_store(struct device *dev, struct device_attribute *attr, |
301 | const char *buf, size_t count) | |
8172499a MP |
302 | { |
303 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
304 | unsigned int val; | |
305 | int err; | |
306 | ||
307 | if (!capable(CAP_SYS_ADMIN)) | |
308 | return -EACCES; | |
309 | ||
310 | err = kstrtouint(buf, 10, &val); | |
311 | ||
312 | if (err) | |
313 | return err; | |
314 | ||
315 | if (val >= 0 && val <= SD_DIF_TYPE3_PROTECTION) | |
316 | sdkp->protection_type = val; | |
317 | ||
318 | return count; | |
319 | } | |
e1ea2351 | 320 | static DEVICE_ATTR_RW(protection_type); |
8172499a | 321 | |
518fa8e3 | 322 | static ssize_t |
e1ea2351 GKH |
323 | protection_mode_show(struct device *dev, struct device_attribute *attr, |
324 | char *buf) | |
518fa8e3 MP |
325 | { |
326 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
327 | struct scsi_device *sdp = sdkp->device; | |
328 | unsigned int dif, dix; | |
329 | ||
330 | dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type); | |
331 | dix = scsi_host_dix_capable(sdp->host, sdkp->protection_type); | |
332 | ||
333 | if (!dix && scsi_host_dix_capable(sdp->host, SD_DIF_TYPE0_PROTECTION)) { | |
334 | dif = 0; | |
335 | dix = 1; | |
336 | } | |
337 | ||
338 | if (!dif && !dix) | |
339 | return snprintf(buf, 20, "none\n"); | |
340 | ||
341 | return snprintf(buf, 20, "%s%u\n", dix ? "dix" : "dif", dif); | |
342 | } | |
e1ea2351 | 343 | static DEVICE_ATTR_RO(protection_mode); |
518fa8e3 | 344 | |
e0597d70 | 345 | static ssize_t |
e1ea2351 | 346 | app_tag_own_show(struct device *dev, struct device_attribute *attr, char *buf) |
e0597d70 MP |
347 | { |
348 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
349 | ||
350 | return snprintf(buf, 20, "%u\n", sdkp->ATO); | |
351 | } | |
e1ea2351 | 352 | static DEVICE_ATTR_RO(app_tag_own); |
e0597d70 | 353 | |
e339c1a7 | 354 | static ssize_t |
e1ea2351 GKH |
355 | thin_provisioning_show(struct device *dev, struct device_attribute *attr, |
356 | char *buf) | |
e339c1a7 MP |
357 | { |
358 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
359 | ||
c98a0eb0 MP |
360 | return snprintf(buf, 20, "%u\n", sdkp->lbpme); |
361 | } | |
e1ea2351 | 362 | static DEVICE_ATTR_RO(thin_provisioning); |
c98a0eb0 MP |
363 | |
364 | static const char *lbp_mode[] = { | |
365 | [SD_LBP_FULL] = "full", | |
366 | [SD_LBP_UNMAP] = "unmap", | |
367 | [SD_LBP_WS16] = "writesame_16", | |
368 | [SD_LBP_WS10] = "writesame_10", | |
369 | [SD_LBP_ZERO] = "writesame_zero", | |
370 | [SD_LBP_DISABLE] = "disabled", | |
371 | }; | |
372 | ||
373 | static ssize_t | |
e1ea2351 GKH |
374 | provisioning_mode_show(struct device *dev, struct device_attribute *attr, |
375 | char *buf) | |
c98a0eb0 MP |
376 | { |
377 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
378 | ||
379 | return snprintf(buf, 20, "%s\n", lbp_mode[sdkp->provisioning_mode]); | |
380 | } | |
381 | ||
382 | static ssize_t | |
e1ea2351 GKH |
383 | provisioning_mode_store(struct device *dev, struct device_attribute *attr, |
384 | const char *buf, size_t count) | |
c98a0eb0 MP |
385 | { |
386 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
387 | struct scsi_device *sdp = sdkp->device; | |
388 | ||
389 | if (!capable(CAP_SYS_ADMIN)) | |
390 | return -EACCES; | |
391 | ||
392 | if (sdp->type != TYPE_DISK) | |
393 | return -EINVAL; | |
394 | ||
395 | if (!strncmp(buf, lbp_mode[SD_LBP_UNMAP], 20)) | |
396 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
397 | else if (!strncmp(buf, lbp_mode[SD_LBP_WS16], 20)) | |
398 | sd_config_discard(sdkp, SD_LBP_WS16); | |
399 | else if (!strncmp(buf, lbp_mode[SD_LBP_WS10], 20)) | |
400 | sd_config_discard(sdkp, SD_LBP_WS10); | |
401 | else if (!strncmp(buf, lbp_mode[SD_LBP_ZERO], 20)) | |
402 | sd_config_discard(sdkp, SD_LBP_ZERO); | |
403 | else if (!strncmp(buf, lbp_mode[SD_LBP_DISABLE], 20)) | |
404 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
405 | else | |
406 | return -EINVAL; | |
407 | ||
408 | return count; | |
e339c1a7 | 409 | } |
e1ea2351 | 410 | static DEVICE_ATTR_RW(provisioning_mode); |
e339c1a7 | 411 | |
18a4d0a2 | 412 | static ssize_t |
e1ea2351 GKH |
413 | max_medium_access_timeouts_show(struct device *dev, |
414 | struct device_attribute *attr, char *buf) | |
18a4d0a2 MP |
415 | { |
416 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
417 | ||
418 | return snprintf(buf, 20, "%u\n", sdkp->max_medium_access_timeouts); | |
419 | } | |
420 | ||
421 | static ssize_t | |
e1ea2351 GKH |
422 | max_medium_access_timeouts_store(struct device *dev, |
423 | struct device_attribute *attr, const char *buf, | |
424 | size_t count) | |
18a4d0a2 MP |
425 | { |
426 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
427 | int err; | |
428 | ||
429 | if (!capable(CAP_SYS_ADMIN)) | |
430 | return -EACCES; | |
431 | ||
432 | err = kstrtouint(buf, 10, &sdkp->max_medium_access_timeouts); | |
433 | ||
434 | return err ? err : count; | |
435 | } | |
e1ea2351 | 436 | static DEVICE_ATTR_RW(max_medium_access_timeouts); |
18a4d0a2 | 437 | |
5db44863 | 438 | static ssize_t |
e1ea2351 GKH |
439 | max_write_same_blocks_show(struct device *dev, struct device_attribute *attr, |
440 | char *buf) | |
5db44863 MP |
441 | { |
442 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
443 | ||
444 | return snprintf(buf, 20, "%u\n", sdkp->max_ws_blocks); | |
445 | } | |
446 | ||
447 | static ssize_t | |
e1ea2351 GKH |
448 | max_write_same_blocks_store(struct device *dev, struct device_attribute *attr, |
449 | const char *buf, size_t count) | |
5db44863 MP |
450 | { |
451 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
452 | struct scsi_device *sdp = sdkp->device; | |
453 | unsigned long max; | |
454 | int err; | |
455 | ||
456 | if (!capable(CAP_SYS_ADMIN)) | |
457 | return -EACCES; | |
458 | ||
459 | if (sdp->type != TYPE_DISK) | |
460 | return -EINVAL; | |
461 | ||
462 | err = kstrtoul(buf, 10, &max); | |
463 | ||
464 | if (err) | |
465 | return err; | |
466 | ||
467 | if (max == 0) | |
468 | sdp->no_write_same = 1; | |
66c28f97 MP |
469 | else if (max <= SD_MAX_WS16_BLOCKS) { |
470 | sdp->no_write_same = 0; | |
5db44863 | 471 | sdkp->max_ws_blocks = max; |
66c28f97 | 472 | } |
5db44863 MP |
473 | |
474 | sd_config_write_same(sdkp); | |
475 | ||
476 | return count; | |
477 | } | |
e1ea2351 GKH |
478 | static DEVICE_ATTR_RW(max_write_same_blocks); |
479 | ||
480 | static struct attribute *sd_disk_attrs[] = { | |
481 | &dev_attr_cache_type.attr, | |
482 | &dev_attr_FUA.attr, | |
483 | &dev_attr_allow_restart.attr, | |
484 | &dev_attr_manage_start_stop.attr, | |
485 | &dev_attr_protection_type.attr, | |
486 | &dev_attr_protection_mode.attr, | |
487 | &dev_attr_app_tag_own.attr, | |
488 | &dev_attr_thin_provisioning.attr, | |
489 | &dev_attr_provisioning_mode.attr, | |
490 | &dev_attr_max_write_same_blocks.attr, | |
491 | &dev_attr_max_medium_access_timeouts.attr, | |
492 | NULL, | |
6bdaa1f1 | 493 | }; |
e1ea2351 | 494 | ATTRIBUTE_GROUPS(sd_disk); |
6bdaa1f1 JB |
495 | |
496 | static struct class sd_disk_class = { | |
497 | .name = "scsi_disk", | |
498 | .owner = THIS_MODULE, | |
ee959b00 | 499 | .dev_release = scsi_disk_release, |
e1ea2351 | 500 | .dev_groups = sd_disk_groups, |
6bdaa1f1 | 501 | }; |
1da177e4 | 502 | |
691e3d31 | 503 | static const struct dev_pm_ops sd_pm_ops = { |
95897910 | 504 | .suspend = sd_suspend_system, |
691e3d31 | 505 | .resume = sd_resume, |
95897910 | 506 | .poweroff = sd_suspend_system, |
691e3d31 | 507 | .restore = sd_resume, |
95897910 | 508 | .runtime_suspend = sd_suspend_runtime, |
691e3d31 AL |
509 | .runtime_resume = sd_resume, |
510 | }; | |
511 | ||
1da177e4 LT |
512 | static struct scsi_driver sd_template = { |
513 | .owner = THIS_MODULE, | |
514 | .gendrv = { | |
515 | .name = "sd", | |
516 | .probe = sd_probe, | |
517 | .remove = sd_remove, | |
518 | .shutdown = sd_shutdown, | |
691e3d31 | 519 | .pm = &sd_pm_ops, |
1da177e4 LT |
520 | }, |
521 | .rescan = sd_rescan, | |
a1b73fc1 CH |
522 | .init_command = sd_init_command, |
523 | .uninit_command = sd_uninit_command, | |
7b3d9545 | 524 | .done = sd_done, |
18a4d0a2 | 525 | .eh_action = sd_eh_action, |
1da177e4 LT |
526 | }; |
527 | ||
0761df9c HR |
528 | /* |
529 | * Dummy kobj_map->probe function. | |
530 | * The default ->probe function will call modprobe, which is | |
531 | * pointless as this module is already loaded. | |
532 | */ | |
533 | static struct kobject *sd_default_probe(dev_t devt, int *partno, void *data) | |
534 | { | |
535 | return NULL; | |
536 | } | |
537 | ||
1da177e4 LT |
538 | /* |
539 | * Device no to disk mapping: | |
540 | * | |
541 | * major disc2 disc p1 | |
542 | * |............|.............|....|....| <- dev_t | |
543 | * 31 20 19 8 7 4 3 0 | |
544 | * | |
545 | * Inside a major, we have 16k disks, however mapped non- | |
546 | * contiguously. The first 16 disks are for major0, the next | |
547 | * ones with major1, ... Disk 256 is for major0 again, disk 272 | |
548 | * for major1, ... | |
549 | * As we stay compatible with our numbering scheme, we can reuse | |
550 | * the well-know SCSI majors 8, 65--71, 136--143. | |
551 | */ | |
552 | static int sd_major(int major_idx) | |
553 | { | |
554 | switch (major_idx) { | |
555 | case 0: | |
556 | return SCSI_DISK0_MAJOR; | |
557 | case 1 ... 7: | |
558 | return SCSI_DISK1_MAJOR + major_idx - 1; | |
559 | case 8 ... 15: | |
560 | return SCSI_DISK8_MAJOR + major_idx - 8; | |
561 | default: | |
562 | BUG(); | |
563 | return 0; /* shut up gcc */ | |
564 | } | |
565 | } | |
566 | ||
39b7f1e2 | 567 | static struct scsi_disk *__scsi_disk_get(struct gendisk *disk) |
1da177e4 LT |
568 | { |
569 | struct scsi_disk *sdkp = NULL; | |
570 | ||
39b7f1e2 AS |
571 | if (disk->private_data) { |
572 | sdkp = scsi_disk(disk); | |
573 | if (scsi_device_get(sdkp->device) == 0) | |
ee959b00 | 574 | get_device(&sdkp->dev); |
39b7f1e2 AS |
575 | else |
576 | sdkp = NULL; | |
577 | } | |
578 | return sdkp; | |
579 | } | |
580 | ||
581 | static struct scsi_disk *scsi_disk_get(struct gendisk *disk) | |
582 | { | |
583 | struct scsi_disk *sdkp; | |
584 | ||
0b950672 | 585 | mutex_lock(&sd_ref_mutex); |
39b7f1e2 | 586 | sdkp = __scsi_disk_get(disk); |
0b950672 | 587 | mutex_unlock(&sd_ref_mutex); |
1da177e4 | 588 | return sdkp; |
39b7f1e2 | 589 | } |
1da177e4 | 590 | |
39b7f1e2 AS |
591 | static struct scsi_disk *scsi_disk_get_from_dev(struct device *dev) |
592 | { | |
593 | struct scsi_disk *sdkp; | |
594 | ||
0b950672 | 595 | mutex_lock(&sd_ref_mutex); |
39b7f1e2 AS |
596 | sdkp = dev_get_drvdata(dev); |
597 | if (sdkp) | |
598 | sdkp = __scsi_disk_get(sdkp->disk); | |
0b950672 | 599 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
600 | return sdkp; |
601 | } | |
602 | ||
603 | static void scsi_disk_put(struct scsi_disk *sdkp) | |
604 | { | |
605 | struct scsi_device *sdev = sdkp->device; | |
606 | ||
0b950672 | 607 | mutex_lock(&sd_ref_mutex); |
ee959b00 | 608 | put_device(&sdkp->dev); |
1da177e4 | 609 | scsi_device_put(sdev); |
0b950672 | 610 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
611 | } |
612 | ||
c611529e MP |
613 | |
614 | ||
615 | static unsigned char sd_setup_protect_cmnd(struct scsi_cmnd *scmd, | |
616 | unsigned int dix, unsigned int dif) | |
35e1a5d9 | 617 | { |
c611529e MP |
618 | struct bio *bio = scmd->request->bio; |
619 | unsigned int prot_op = sd_prot_op(rq_data_dir(scmd->request), dix, dif); | |
620 | unsigned int protect = 0; | |
621 | ||
622 | if (dix) { /* DIX Type 0, 1, 2, 3 */ | |
623 | if (bio_integrity_flagged(bio, BIP_IP_CHECKSUM)) | |
624 | scmd->prot_flags |= SCSI_PROT_IP_CHECKSUM; | |
625 | ||
626 | if (bio_integrity_flagged(bio, BIP_CTRL_NOCHECK) == false) | |
627 | scmd->prot_flags |= SCSI_PROT_GUARD_CHECK; | |
628 | } | |
629 | ||
630 | if (dif != SD_DIF_TYPE3_PROTECTION) { /* DIX/DIF Type 0, 1, 2 */ | |
631 | scmd->prot_flags |= SCSI_PROT_REF_INCREMENT; | |
632 | ||
633 | if (bio_integrity_flagged(bio, BIP_CTRL_NOCHECK) == false) | |
634 | scmd->prot_flags |= SCSI_PROT_REF_CHECK; | |
635 | } | |
636 | ||
637 | if (dif) { /* DIX/DIF Type 1, 2, 3 */ | |
638 | scmd->prot_flags |= SCSI_PROT_TRANSFER_PI; | |
639 | ||
640 | if (bio_integrity_flagged(bio, BIP_DISK_NOCHECK)) | |
641 | protect = 3 << 5; /* Disable target PI checking */ | |
642 | else | |
643 | protect = 1 << 5; /* Enable target PI checking */ | |
35e1a5d9 MP |
644 | } |
645 | ||
646 | scsi_set_prot_op(scmd, prot_op); | |
647 | scsi_set_prot_type(scmd, dif); | |
c611529e MP |
648 | scmd->prot_flags &= sd_prot_flag_mask(prot_op); |
649 | ||
650 | return protect; | |
35e1a5d9 MP |
651 | } |
652 | ||
c98a0eb0 MP |
653 | static void sd_config_discard(struct scsi_disk *sdkp, unsigned int mode) |
654 | { | |
655 | struct request_queue *q = sdkp->disk->queue; | |
656 | unsigned int logical_block_size = sdkp->device->sector_size; | |
657 | unsigned int max_blocks = 0; | |
658 | ||
659 | q->limits.discard_zeroes_data = sdkp->lbprz; | |
2a8cfad0 MP |
660 | q->limits.discard_alignment = sdkp->unmap_alignment * |
661 | logical_block_size; | |
c98a0eb0 MP |
662 | q->limits.discard_granularity = |
663 | max(sdkp->physical_block_size, | |
664 | sdkp->unmap_granularity * logical_block_size); | |
665 | ||
89730393 MP |
666 | sdkp->provisioning_mode = mode; |
667 | ||
c98a0eb0 MP |
668 | switch (mode) { |
669 | ||
670 | case SD_LBP_DISABLE: | |
671 | q->limits.max_discard_sectors = 0; | |
672 | queue_flag_clear_unlocked(QUEUE_FLAG_DISCARD, q); | |
673 | return; | |
674 | ||
675 | case SD_LBP_UNMAP: | |
5db44863 MP |
676 | max_blocks = min_not_zero(sdkp->max_unmap_blocks, |
677 | (u32)SD_MAX_WS16_BLOCKS); | |
c98a0eb0 MP |
678 | break; |
679 | ||
680 | case SD_LBP_WS16: | |
5db44863 MP |
681 | max_blocks = min_not_zero(sdkp->max_ws_blocks, |
682 | (u32)SD_MAX_WS16_BLOCKS); | |
c98a0eb0 MP |
683 | break; |
684 | ||
685 | case SD_LBP_WS10: | |
5db44863 MP |
686 | max_blocks = min_not_zero(sdkp->max_ws_blocks, |
687 | (u32)SD_MAX_WS10_BLOCKS); | |
c98a0eb0 MP |
688 | break; |
689 | ||
690 | case SD_LBP_ZERO: | |
5db44863 MP |
691 | max_blocks = min_not_zero(sdkp->max_ws_blocks, |
692 | (u32)SD_MAX_WS10_BLOCKS); | |
c98a0eb0 MP |
693 | q->limits.discard_zeroes_data = 1; |
694 | break; | |
695 | } | |
696 | ||
697 | q->limits.max_discard_sectors = max_blocks * (logical_block_size >> 9); | |
698 | queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, q); | |
c98a0eb0 MP |
699 | } |
700 | ||
e339c1a7 | 701 | /** |
26e85fcd | 702 | * sd_setup_discard_cmnd - unmap blocks on thinly provisioned device |
66ac0280 | 703 | * @sdp: scsi device to operate one |
e339c1a7 MP |
704 | * @rq: Request to prepare |
705 | * | |
706 | * Will issue either UNMAP or WRITE SAME(16) depending on preference | |
707 | * indicated by target device. | |
708 | **/ | |
6a7b4398 | 709 | static int sd_setup_discard_cmnd(struct scsi_cmnd *cmd) |
e339c1a7 | 710 | { |
6a7b4398 CH |
711 | struct request *rq = cmd->request; |
712 | struct scsi_device *sdp = cmd->device; | |
e339c1a7 | 713 | struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); |
26e85fcd MP |
714 | sector_t sector = blk_rq_pos(rq); |
715 | unsigned int nr_sectors = blk_rq_sectors(rq); | |
716 | unsigned int nr_bytes = blk_rq_bytes(rq); | |
66ac0280 | 717 | unsigned int len; |
f1126e95 | 718 | int ret; |
c98a0eb0 | 719 | char *buf; |
66ac0280 | 720 | struct page *page; |
e339c1a7 | 721 | |
26e85fcd MP |
722 | sector >>= ilog2(sdp->sector_size) - 9; |
723 | nr_sectors >>= ilog2(sdp->sector_size) - 9; | |
e339c1a7 | 724 | |
66ac0280 CH |
725 | page = alloc_page(GFP_ATOMIC | __GFP_ZERO); |
726 | if (!page) | |
727 | return BLKPREP_DEFER; | |
728 | ||
c98a0eb0 MP |
729 | switch (sdkp->provisioning_mode) { |
730 | case SD_LBP_UNMAP: | |
731 | buf = page_address(page); | |
e339c1a7 | 732 | |
6a7b4398 CH |
733 | cmd->cmd_len = 10; |
734 | cmd->cmnd[0] = UNMAP; | |
735 | cmd->cmnd[8] = 24; | |
e339c1a7 MP |
736 | |
737 | put_unaligned_be16(6 + 16, &buf[0]); | |
738 | put_unaligned_be16(16, &buf[2]); | |
739 | put_unaligned_be64(sector, &buf[8]); | |
66ac0280 | 740 | put_unaligned_be32(nr_sectors, &buf[16]); |
e339c1a7 | 741 | |
66ac0280 | 742 | len = 24; |
c98a0eb0 MP |
743 | break; |
744 | ||
745 | case SD_LBP_WS16: | |
6a7b4398 CH |
746 | cmd->cmd_len = 16; |
747 | cmd->cmnd[0] = WRITE_SAME_16; | |
748 | cmd->cmnd[1] = 0x8; /* UNMAP */ | |
749 | put_unaligned_be64(sector, &cmd->cmnd[2]); | |
750 | put_unaligned_be32(nr_sectors, &cmd->cmnd[10]); | |
66ac0280 CH |
751 | |
752 | len = sdkp->device->sector_size; | |
c98a0eb0 MP |
753 | break; |
754 | ||
755 | case SD_LBP_WS10: | |
756 | case SD_LBP_ZERO: | |
6a7b4398 CH |
757 | cmd->cmd_len = 10; |
758 | cmd->cmnd[0] = WRITE_SAME; | |
c98a0eb0 | 759 | if (sdkp->provisioning_mode == SD_LBP_WS10) |
6a7b4398 CH |
760 | cmd->cmnd[1] = 0x8; /* UNMAP */ |
761 | put_unaligned_be32(sector, &cmd->cmnd[2]); | |
762 | put_unaligned_be16(nr_sectors, &cmd->cmnd[7]); | |
c98a0eb0 MP |
763 | |
764 | len = sdkp->device->sector_size; | |
765 | break; | |
766 | ||
767 | default: | |
09b9cc44 | 768 | ret = BLKPREP_KILL; |
c98a0eb0 | 769 | goto out; |
e339c1a7 MP |
770 | } |
771 | ||
dc4a9307 | 772 | rq->completion_data = page; |
6a7b4398 CH |
773 | rq->timeout = SD_TIMEOUT; |
774 | ||
775 | cmd->transfersize = len; | |
e4200f8e | 776 | cmd->allowed = SD_MAX_RETRIES; |
6a7b4398 CH |
777 | |
778 | /* | |
779 | * Initially __data_len is set to the amount of data that needs to be | |
780 | * transferred to the target. This amount depends on whether WRITE SAME | |
781 | * or UNMAP is being used. After the scatterlist has been mapped by | |
782 | * scsi_init_io() we set __data_len to the size of the area to be | |
783 | * discarded on disk. This allows us to report completion on the full | |
784 | * amount of blocks described by the request. | |
785 | */ | |
66ac0280 | 786 | blk_add_request_payload(rq, page, len); |
6a7b4398 | 787 | ret = scsi_init_io(cmd, GFP_ATOMIC); |
26e85fcd | 788 | rq->__data_len = nr_bytes; |
c98a0eb0 MP |
789 | |
790 | out: | |
b4f42e28 | 791 | if (ret != BLKPREP_OK) |
610a6349 | 792 | __free_page(page); |
f1126e95 FT |
793 | return ret; |
794 | } | |
795 | ||
5db44863 MP |
796 | static void sd_config_write_same(struct scsi_disk *sdkp) |
797 | { | |
798 | struct request_queue *q = sdkp->disk->queue; | |
799 | unsigned int logical_block_size = sdkp->device->sector_size; | |
5db44863 MP |
800 | |
801 | if (sdkp->device->no_write_same) { | |
802 | sdkp->max_ws_blocks = 0; | |
803 | goto out; | |
804 | } | |
805 | ||
806 | /* Some devices can not handle block counts above 0xffff despite | |
807 | * supporting WRITE SAME(16). Consequently we default to 64k | |
808 | * blocks per I/O unless the device explicitly advertises a | |
809 | * bigger limit. | |
810 | */ | |
66c28f97 MP |
811 | if (sdkp->max_ws_blocks > SD_MAX_WS10_BLOCKS) |
812 | sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks, | |
813 | (u32)SD_MAX_WS16_BLOCKS); | |
814 | else if (sdkp->ws16 || sdkp->ws10 || sdkp->device->no_report_opcodes) | |
815 | sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks, | |
816 | (u32)SD_MAX_WS10_BLOCKS); | |
817 | else { | |
818 | sdkp->device->no_write_same = 1; | |
819 | sdkp->max_ws_blocks = 0; | |
820 | } | |
5db44863 MP |
821 | |
822 | out: | |
66c28f97 MP |
823 | blk_queue_max_write_same_sectors(q, sdkp->max_ws_blocks * |
824 | (logical_block_size >> 9)); | |
5db44863 MP |
825 | } |
826 | ||
827 | /** | |
828 | * sd_setup_write_same_cmnd - write the same data to multiple blocks | |
59b1134c | 829 | * @cmd: command to prepare |
5db44863 MP |
830 | * |
831 | * Will issue either WRITE SAME(10) or WRITE SAME(16) depending on | |
832 | * preference indicated by target device. | |
833 | **/ | |
59b1134c | 834 | static int sd_setup_write_same_cmnd(struct scsi_cmnd *cmd) |
5db44863 | 835 | { |
59b1134c CH |
836 | struct request *rq = cmd->request; |
837 | struct scsi_device *sdp = cmd->device; | |
5db44863 MP |
838 | struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); |
839 | struct bio *bio = rq->bio; | |
840 | sector_t sector = blk_rq_pos(rq); | |
841 | unsigned int nr_sectors = blk_rq_sectors(rq); | |
842 | unsigned int nr_bytes = blk_rq_bytes(rq); | |
843 | int ret; | |
844 | ||
845 | if (sdkp->device->no_write_same) | |
846 | return BLKPREP_KILL; | |
847 | ||
a4ad39b1 | 848 | BUG_ON(bio_offset(bio) || bio_iovec(bio).bv_len != sdp->sector_size); |
5db44863 MP |
849 | |
850 | sector >>= ilog2(sdp->sector_size) - 9; | |
851 | nr_sectors >>= ilog2(sdp->sector_size) - 9; | |
852 | ||
5db44863 | 853 | rq->timeout = SD_WRITE_SAME_TIMEOUT; |
5db44863 MP |
854 | |
855 | if (sdkp->ws16 || sector > 0xffffffff || nr_sectors > 0xffff) { | |
59b1134c CH |
856 | cmd->cmd_len = 16; |
857 | cmd->cmnd[0] = WRITE_SAME_16; | |
858 | put_unaligned_be64(sector, &cmd->cmnd[2]); | |
859 | put_unaligned_be32(nr_sectors, &cmd->cmnd[10]); | |
5db44863 | 860 | } else { |
59b1134c CH |
861 | cmd->cmd_len = 10; |
862 | cmd->cmnd[0] = WRITE_SAME; | |
863 | put_unaligned_be32(sector, &cmd->cmnd[2]); | |
864 | put_unaligned_be16(nr_sectors, &cmd->cmnd[7]); | |
5db44863 MP |
865 | } |
866 | ||
59b1134c | 867 | cmd->transfersize = sdp->sector_size; |
a25ee548 | 868 | cmd->allowed = SD_MAX_RETRIES; |
5db44863 | 869 | |
59b1134c CH |
870 | /* |
871 | * For WRITE_SAME the data transferred in the DATA IN buffer is | |
872 | * different from the amount of data actually written to the target. | |
873 | * | |
874 | * We set up __data_len to the amount of data transferred from the | |
875 | * DATA IN buffer so that blk_rq_map_sg set up the proper S/G list | |
876 | * to transfer a single sector of data first, but then reset it to | |
877 | * the amount of data to be written right after so that the I/O path | |
878 | * knows how much to actually write. | |
879 | */ | |
880 | rq->__data_len = sdp->sector_size; | |
881 | ret = scsi_init_io(cmd, GFP_ATOMIC); | |
882 | rq->__data_len = nr_bytes; | |
5db44863 MP |
883 | return ret; |
884 | } | |
885 | ||
a118c6c1 | 886 | static int sd_setup_flush_cmnd(struct scsi_cmnd *cmd) |
90467c29 | 887 | { |
a118c6c1 CH |
888 | struct request *rq = cmd->request; |
889 | ||
890 | /* flush requests don't perform I/O, zero the S/G table */ | |
891 | memset(&cmd->sdb, 0, sizeof(cmd->sdb)); | |
90467c29 | 892 | |
a118c6c1 CH |
893 | cmd->cmnd[0] = SYNCHRONIZE_CACHE; |
894 | cmd->cmd_len = 10; | |
895 | cmd->transfersize = 0; | |
896 | cmd->allowed = SD_MAX_RETRIES; | |
897 | ||
26b9fd8b | 898 | rq->timeout = rq->q->rq_timeout * SD_FLUSH_TIMEOUT_MULTIPLIER; |
a118c6c1 | 899 | return BLKPREP_OK; |
90467c29 FT |
900 | } |
901 | ||
87949eee | 902 | static int sd_setup_read_write_cmnd(struct scsi_cmnd *SCpnt) |
1da177e4 | 903 | { |
a1b73fc1 CH |
904 | struct request *rq = SCpnt->request; |
905 | struct scsi_device *sdp = SCpnt->device; | |
776b23a0 | 906 | struct gendisk *disk = rq->rq_disk; |
af55ff67 | 907 | struct scsi_disk *sdkp; |
83096ebf | 908 | sector_t block = blk_rq_pos(rq); |
18351070 | 909 | sector_t threshold; |
83096ebf | 910 | unsigned int this_count = blk_rq_sectors(rq); |
c611529e MP |
911 | unsigned int dif, dix; |
912 | int ret; | |
4e7392ec | 913 | unsigned char protect; |
7f9a6bc4 | 914 | |
3868cf8e | 915 | ret = scsi_init_io(SCpnt, GFP_ATOMIC); |
7f9a6bc4 JB |
916 | if (ret != BLKPREP_OK) |
917 | goto out; | |
918 | SCpnt = rq->special; | |
af55ff67 | 919 | sdkp = scsi_disk(disk); |
7f9a6bc4 JB |
920 | |
921 | /* from here on until we're complete, any goto out | |
922 | * is used for a killable error condition */ | |
923 | ret = BLKPREP_KILL; | |
1da177e4 | 924 | |
a1b73fc1 CH |
925 | SCSI_LOG_HLQUEUE(1, |
926 | scmd_printk(KERN_INFO, SCpnt, | |
927 | "%s: block=%llu, count=%d\n", | |
928 | __func__, (unsigned long long)block, this_count)); | |
1da177e4 LT |
929 | |
930 | if (!sdp || !scsi_device_online(sdp) || | |
83096ebf | 931 | block + blk_rq_sectors(rq) > get_capacity(disk)) { |
fa0d34be | 932 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
83096ebf TH |
933 | "Finishing %u sectors\n", |
934 | blk_rq_sectors(rq))); | |
fa0d34be MP |
935 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
936 | "Retry with 0x%p\n", SCpnt)); | |
7f9a6bc4 | 937 | goto out; |
1da177e4 LT |
938 | } |
939 | ||
940 | if (sdp->changed) { | |
941 | /* | |
942 | * quietly refuse to do anything to a changed disc until | |
943 | * the changed bit has been reset | |
944 | */ | |
3ff5588d | 945 | /* printk("SCSI disk has been changed or is not present. Prohibiting further I/O.\n"); */ |
7f9a6bc4 | 946 | goto out; |
1da177e4 | 947 | } |
7f9a6bc4 | 948 | |
a0899d4d | 949 | /* |
18351070 LT |
950 | * Some SD card readers can't handle multi-sector accesses which touch |
951 | * the last one or two hardware sectors. Split accesses as needed. | |
a0899d4d | 952 | */ |
18351070 LT |
953 | threshold = get_capacity(disk) - SD_LAST_BUGGY_SECTORS * |
954 | (sdp->sector_size / 512); | |
955 | ||
956 | if (unlikely(sdp->last_sector_bug && block + this_count > threshold)) { | |
957 | if (block < threshold) { | |
958 | /* Access up to the threshold but not beyond */ | |
959 | this_count = threshold - block; | |
960 | } else { | |
961 | /* Access only a single hardware sector */ | |
962 | this_count = sdp->sector_size / 512; | |
963 | } | |
964 | } | |
a0899d4d | 965 | |
fa0d34be MP |
966 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, "block=%llu\n", |
967 | (unsigned long long)block)); | |
1da177e4 LT |
968 | |
969 | /* | |
970 | * If we have a 1K hardware sectorsize, prevent access to single | |
971 | * 512 byte sectors. In theory we could handle this - in fact | |
972 | * the scsi cdrom driver must be able to handle this because | |
973 | * we typically use 1K blocksizes, and cdroms typically have | |
974 | * 2K hardware sectorsizes. Of course, things are simpler | |
975 | * with the cdrom, since it is read-only. For performance | |
976 | * reasons, the filesystems should be able to handle this | |
977 | * and not force the scsi disk driver to use bounce buffers | |
978 | * for this. | |
979 | */ | |
980 | if (sdp->sector_size == 1024) { | |
83096ebf | 981 | if ((block & 1) || (blk_rq_sectors(rq) & 1)) { |
e73aec82 MP |
982 | scmd_printk(KERN_ERR, SCpnt, |
983 | "Bad block number requested\n"); | |
7f9a6bc4 | 984 | goto out; |
1da177e4 LT |
985 | } else { |
986 | block = block >> 1; | |
987 | this_count = this_count >> 1; | |
988 | } | |
989 | } | |
990 | if (sdp->sector_size == 2048) { | |
83096ebf | 991 | if ((block & 3) || (blk_rq_sectors(rq) & 3)) { |
e73aec82 MP |
992 | scmd_printk(KERN_ERR, SCpnt, |
993 | "Bad block number requested\n"); | |
7f9a6bc4 | 994 | goto out; |
1da177e4 LT |
995 | } else { |
996 | block = block >> 2; | |
997 | this_count = this_count >> 2; | |
998 | } | |
999 | } | |
1000 | if (sdp->sector_size == 4096) { | |
83096ebf | 1001 | if ((block & 7) || (blk_rq_sectors(rq) & 7)) { |
e73aec82 MP |
1002 | scmd_printk(KERN_ERR, SCpnt, |
1003 | "Bad block number requested\n"); | |
7f9a6bc4 | 1004 | goto out; |
1da177e4 LT |
1005 | } else { |
1006 | block = block >> 3; | |
1007 | this_count = this_count >> 3; | |
1008 | } | |
1009 | } | |
1010 | if (rq_data_dir(rq) == WRITE) { | |
1da177e4 | 1011 | SCpnt->cmnd[0] = WRITE_6; |
af55ff67 | 1012 | |
8c579ab6 | 1013 | if (blk_integrity_rq(rq)) |
c611529e | 1014 | sd_dif_prepare(SCpnt); |
af55ff67 | 1015 | |
1da177e4 LT |
1016 | } else if (rq_data_dir(rq) == READ) { |
1017 | SCpnt->cmnd[0] = READ_6; | |
1da177e4 | 1018 | } else { |
5953316d | 1019 | scmd_printk(KERN_ERR, SCpnt, "Unknown command %llx\n", (unsigned long long) rq->cmd_flags); |
7f9a6bc4 | 1020 | goto out; |
1da177e4 LT |
1021 | } |
1022 | ||
fa0d34be | 1023 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
83096ebf | 1024 | "%s %d/%u 512 byte blocks.\n", |
fa0d34be MP |
1025 | (rq_data_dir(rq) == WRITE) ? |
1026 | "writing" : "reading", this_count, | |
83096ebf | 1027 | blk_rq_sectors(rq))); |
1da177e4 | 1028 | |
c611529e MP |
1029 | dix = scsi_prot_sg_count(SCpnt); |
1030 | dif = scsi_host_dif_capable(SCpnt->device->host, sdkp->protection_type); | |
1031 | ||
1032 | if (dif || dix) | |
1033 | protect = sd_setup_protect_cmnd(SCpnt, dix, dif); | |
af55ff67 | 1034 | else |
4e7392ec MP |
1035 | protect = 0; |
1036 | ||
c611529e | 1037 | if (protect && sdkp->protection_type == SD_DIF_TYPE2_PROTECTION) { |
4e7392ec MP |
1038 | SCpnt->cmnd = mempool_alloc(sd_cdb_pool, GFP_ATOMIC); |
1039 | ||
1040 | if (unlikely(SCpnt->cmnd == NULL)) { | |
1041 | ret = BLKPREP_DEFER; | |
1042 | goto out; | |
1043 | } | |
af55ff67 | 1044 | |
4e7392ec MP |
1045 | SCpnt->cmd_len = SD_EXT_CDB_SIZE; |
1046 | memset(SCpnt->cmnd, 0, SCpnt->cmd_len); | |
1047 | SCpnt->cmnd[0] = VARIABLE_LENGTH_CMD; | |
1048 | SCpnt->cmnd[7] = 0x18; | |
1049 | SCpnt->cmnd[9] = (rq_data_dir(rq) == READ) ? READ_32 : WRITE_32; | |
33659ebb | 1050 | SCpnt->cmnd[10] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
4e7392ec MP |
1051 | |
1052 | /* LBA */ | |
1053 | SCpnt->cmnd[12] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0; | |
1054 | SCpnt->cmnd[13] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0; | |
1055 | SCpnt->cmnd[14] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0; | |
1056 | SCpnt->cmnd[15] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0; | |
1057 | SCpnt->cmnd[16] = (unsigned char) (block >> 24) & 0xff; | |
1058 | SCpnt->cmnd[17] = (unsigned char) (block >> 16) & 0xff; | |
1059 | SCpnt->cmnd[18] = (unsigned char) (block >> 8) & 0xff; | |
1060 | SCpnt->cmnd[19] = (unsigned char) block & 0xff; | |
1061 | ||
1062 | /* Expected Indirect LBA */ | |
1063 | SCpnt->cmnd[20] = (unsigned char) (block >> 24) & 0xff; | |
1064 | SCpnt->cmnd[21] = (unsigned char) (block >> 16) & 0xff; | |
1065 | SCpnt->cmnd[22] = (unsigned char) (block >> 8) & 0xff; | |
1066 | SCpnt->cmnd[23] = (unsigned char) block & 0xff; | |
1067 | ||
1068 | /* Transfer length */ | |
1069 | SCpnt->cmnd[28] = (unsigned char) (this_count >> 24) & 0xff; | |
1070 | SCpnt->cmnd[29] = (unsigned char) (this_count >> 16) & 0xff; | |
1071 | SCpnt->cmnd[30] = (unsigned char) (this_count >> 8) & 0xff; | |
1072 | SCpnt->cmnd[31] = (unsigned char) this_count & 0xff; | |
e430cbc8 | 1073 | } else if (sdp->use_16_for_rw || (this_count > 0xffff)) { |
1da177e4 | 1074 | SCpnt->cmnd[0] += READ_16 - READ_6; |
33659ebb | 1075 | SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
1da177e4 LT |
1076 | SCpnt->cmnd[2] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0; |
1077 | SCpnt->cmnd[3] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0; | |
1078 | SCpnt->cmnd[4] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0; | |
1079 | SCpnt->cmnd[5] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0; | |
1080 | SCpnt->cmnd[6] = (unsigned char) (block >> 24) & 0xff; | |
1081 | SCpnt->cmnd[7] = (unsigned char) (block >> 16) & 0xff; | |
1082 | SCpnt->cmnd[8] = (unsigned char) (block >> 8) & 0xff; | |
1083 | SCpnt->cmnd[9] = (unsigned char) block & 0xff; | |
1084 | SCpnt->cmnd[10] = (unsigned char) (this_count >> 24) & 0xff; | |
1085 | SCpnt->cmnd[11] = (unsigned char) (this_count >> 16) & 0xff; | |
1086 | SCpnt->cmnd[12] = (unsigned char) (this_count >> 8) & 0xff; | |
1087 | SCpnt->cmnd[13] = (unsigned char) this_count & 0xff; | |
1088 | SCpnt->cmnd[14] = SCpnt->cmnd[15] = 0; | |
1089 | } else if ((this_count > 0xff) || (block > 0x1fffff) || | |
af55ff67 | 1090 | scsi_device_protection(SCpnt->device) || |
1da177e4 | 1091 | SCpnt->device->use_10_for_rw) { |
1da177e4 | 1092 | SCpnt->cmnd[0] += READ_10 - READ_6; |
33659ebb | 1093 | SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
1da177e4 LT |
1094 | SCpnt->cmnd[2] = (unsigned char) (block >> 24) & 0xff; |
1095 | SCpnt->cmnd[3] = (unsigned char) (block >> 16) & 0xff; | |
1096 | SCpnt->cmnd[4] = (unsigned char) (block >> 8) & 0xff; | |
1097 | SCpnt->cmnd[5] = (unsigned char) block & 0xff; | |
1098 | SCpnt->cmnd[6] = SCpnt->cmnd[9] = 0; | |
1099 | SCpnt->cmnd[7] = (unsigned char) (this_count >> 8) & 0xff; | |
1100 | SCpnt->cmnd[8] = (unsigned char) this_count & 0xff; | |
1101 | } else { | |
33659ebb | 1102 | if (unlikely(rq->cmd_flags & REQ_FUA)) { |
007365ad TH |
1103 | /* |
1104 | * This happens only if this drive failed | |
1105 | * 10byte rw command with ILLEGAL_REQUEST | |
1106 | * during operation and thus turned off | |
1107 | * use_10_for_rw. | |
1108 | */ | |
e73aec82 MP |
1109 | scmd_printk(KERN_ERR, SCpnt, |
1110 | "FUA write on READ/WRITE(6) drive\n"); | |
7f9a6bc4 | 1111 | goto out; |
007365ad TH |
1112 | } |
1113 | ||
1da177e4 LT |
1114 | SCpnt->cmnd[1] |= (unsigned char) ((block >> 16) & 0x1f); |
1115 | SCpnt->cmnd[2] = (unsigned char) ((block >> 8) & 0xff); | |
1116 | SCpnt->cmnd[3] = (unsigned char) block & 0xff; | |
1117 | SCpnt->cmnd[4] = (unsigned char) this_count; | |
1118 | SCpnt->cmnd[5] = 0; | |
1119 | } | |
30b0c37b | 1120 | SCpnt->sdb.length = this_count * sdp->sector_size; |
1da177e4 LT |
1121 | |
1122 | /* | |
1123 | * We shouldn't disconnect in the middle of a sector, so with a dumb | |
1124 | * host adapter, it's safe to assume that we can at least transfer | |
1125 | * this many bytes between each connect / disconnect. | |
1126 | */ | |
1127 | SCpnt->transfersize = sdp->sector_size; | |
1128 | SCpnt->underflow = this_count << 9; | |
1129 | SCpnt->allowed = SD_MAX_RETRIES; | |
1da177e4 | 1130 | |
1da177e4 LT |
1131 | /* |
1132 | * This indicates that the command is ready from our end to be | |
1133 | * queued. | |
1134 | */ | |
7f9a6bc4 JB |
1135 | ret = BLKPREP_OK; |
1136 | out: | |
a1b73fc1 | 1137 | return ret; |
1da177e4 LT |
1138 | } |
1139 | ||
87949eee CH |
1140 | static int sd_init_command(struct scsi_cmnd *cmd) |
1141 | { | |
1142 | struct request *rq = cmd->request; | |
1143 | ||
1144 | if (rq->cmd_flags & REQ_DISCARD) | |
1145 | return sd_setup_discard_cmnd(cmd); | |
1146 | else if (rq->cmd_flags & REQ_WRITE_SAME) | |
1147 | return sd_setup_write_same_cmnd(cmd); | |
1148 | else if (rq->cmd_flags & REQ_FLUSH) | |
1149 | return sd_setup_flush_cmnd(cmd); | |
1150 | else | |
1151 | return sd_setup_read_write_cmnd(cmd); | |
1152 | } | |
1153 | ||
1154 | static void sd_uninit_command(struct scsi_cmnd *SCpnt) | |
1155 | { | |
1156 | struct request *rq = SCpnt->request; | |
1157 | ||
1158 | if (rq->cmd_flags & REQ_DISCARD) | |
1159 | __free_page(rq->completion_data); | |
1160 | ||
1161 | if (SCpnt->cmnd != rq->cmd) { | |
1162 | mempool_free(SCpnt->cmnd, sd_cdb_pool); | |
1163 | SCpnt->cmnd = NULL; | |
1164 | SCpnt->cmd_len = 0; | |
1165 | } | |
1166 | } | |
1167 | ||
1da177e4 LT |
1168 | /** |
1169 | * sd_open - open a scsi disk device | |
1170 | * @inode: only i_rdev member may be used | |
1171 | * @filp: only f_mode and f_flags may be used | |
1172 | * | |
1173 | * Returns 0 if successful. Returns a negated errno value in case | |
1174 | * of error. | |
1175 | * | |
1176 | * Note: This can be called from a user context (e.g. fsck(1) ) | |
1177 | * or from within the kernel (e.g. as a result of a mount(1) ). | |
1178 | * In the latter case @inode and @filp carry an abridged amount | |
1179 | * of information as noted above. | |
409f3499 AB |
1180 | * |
1181 | * Locking: called with bdev->bd_mutex held. | |
1da177e4 | 1182 | **/ |
0338e291 | 1183 | static int sd_open(struct block_device *bdev, fmode_t mode) |
1da177e4 | 1184 | { |
0338e291 | 1185 | struct scsi_disk *sdkp = scsi_disk_get(bdev->bd_disk); |
1da177e4 LT |
1186 | struct scsi_device *sdev; |
1187 | int retval; | |
1188 | ||
0338e291 | 1189 | if (!sdkp) |
1da177e4 LT |
1190 | return -ENXIO; |
1191 | ||
fa0d34be | 1192 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_open\n")); |
1da177e4 LT |
1193 | |
1194 | sdev = sdkp->device; | |
1195 | ||
1196 | /* | |
1197 | * If the device is in error recovery, wait until it is done. | |
1198 | * If the device is offline, then disallow any access to it. | |
1199 | */ | |
1200 | retval = -ENXIO; | |
1201 | if (!scsi_block_when_processing_errors(sdev)) | |
1202 | goto error_out; | |
1203 | ||
1204 | if (sdev->removable || sdkp->write_prot) | |
0338e291 | 1205 | check_disk_change(bdev); |
1da177e4 LT |
1206 | |
1207 | /* | |
1208 | * If the drive is empty, just let the open fail. | |
1209 | */ | |
1210 | retval = -ENOMEDIUM; | |
0338e291 | 1211 | if (sdev->removable && !sdkp->media_present && !(mode & FMODE_NDELAY)) |
1da177e4 LT |
1212 | goto error_out; |
1213 | ||
1214 | /* | |
1215 | * If the device has the write protect tab set, have the open fail | |
1216 | * if the user expects to be able to write to the thing. | |
1217 | */ | |
1218 | retval = -EROFS; | |
0338e291 | 1219 | if (sdkp->write_prot && (mode & FMODE_WRITE)) |
1da177e4 LT |
1220 | goto error_out; |
1221 | ||
1222 | /* | |
1223 | * It is possible that the disk changing stuff resulted in | |
1224 | * the device being taken offline. If this is the case, | |
1225 | * report this to the user, and don't pretend that the | |
1226 | * open actually succeeded. | |
1227 | */ | |
1228 | retval = -ENXIO; | |
1229 | if (!scsi_device_online(sdev)) | |
1230 | goto error_out; | |
1231 | ||
409f3499 | 1232 | if ((atomic_inc_return(&sdkp->openers) == 1) && sdev->removable) { |
1da177e4 LT |
1233 | if (scsi_block_when_processing_errors(sdev)) |
1234 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT); | |
1235 | } | |
1236 | ||
1237 | return 0; | |
1238 | ||
1239 | error_out: | |
1240 | scsi_disk_put(sdkp); | |
1241 | return retval; | |
1242 | } | |
1243 | ||
1244 | /** | |
1245 | * sd_release - invoked when the (last) close(2) is called on this | |
1246 | * scsi disk. | |
1247 | * @inode: only i_rdev member may be used | |
1248 | * @filp: only f_mode and f_flags may be used | |
1249 | * | |
1250 | * Returns 0. | |
1251 | * | |
1252 | * Note: may block (uninterruptible) if error recovery is underway | |
1253 | * on this disk. | |
409f3499 AB |
1254 | * |
1255 | * Locking: called with bdev->bd_mutex held. | |
1da177e4 | 1256 | **/ |
db2a144b | 1257 | static void sd_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 1258 | { |
1da177e4 LT |
1259 | struct scsi_disk *sdkp = scsi_disk(disk); |
1260 | struct scsi_device *sdev = sdkp->device; | |
1261 | ||
56937f7b | 1262 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_release\n")); |
1da177e4 | 1263 | |
7e443312 | 1264 | if (atomic_dec_return(&sdkp->openers) == 0 && sdev->removable) { |
1da177e4 LT |
1265 | if (scsi_block_when_processing_errors(sdev)) |
1266 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW); | |
1267 | } | |
1268 | ||
1269 | /* | |
1270 | * XXX and what if there are packets in flight and this close() | |
1271 | * XXX is followed by a "rmmod sd_mod"? | |
1272 | */ | |
478a8a05 | 1273 | |
1da177e4 | 1274 | scsi_disk_put(sdkp); |
1da177e4 LT |
1275 | } |
1276 | ||
a885c8c4 | 1277 | static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
1da177e4 LT |
1278 | { |
1279 | struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk); | |
1280 | struct scsi_device *sdp = sdkp->device; | |
1281 | struct Scsi_Host *host = sdp->host; | |
1282 | int diskinfo[4]; | |
1283 | ||
1284 | /* default to most commonly used values */ | |
1285 | diskinfo[0] = 0x40; /* 1 << 6 */ | |
1286 | diskinfo[1] = 0x20; /* 1 << 5 */ | |
1287 | diskinfo[2] = sdkp->capacity >> 11; | |
1288 | ||
1289 | /* override with calculated, extended default, or driver values */ | |
1290 | if (host->hostt->bios_param) | |
1291 | host->hostt->bios_param(sdp, bdev, sdkp->capacity, diskinfo); | |
1292 | else | |
1293 | scsicam_bios_param(bdev, sdkp->capacity, diskinfo); | |
1294 | ||
a885c8c4 CH |
1295 | geo->heads = diskinfo[0]; |
1296 | geo->sectors = diskinfo[1]; | |
1297 | geo->cylinders = diskinfo[2]; | |
1da177e4 LT |
1298 | return 0; |
1299 | } | |
1300 | ||
1301 | /** | |
1302 | * sd_ioctl - process an ioctl | |
1303 | * @inode: only i_rdev/i_bdev members may be used | |
1304 | * @filp: only f_mode and f_flags may be used | |
1305 | * @cmd: ioctl command number | |
1306 | * @arg: this is third argument given to ioctl(2) system call. | |
1307 | * Often contains a pointer. | |
1308 | * | |
25985edc | 1309 | * Returns 0 if successful (some ioctls return positive numbers on |
1da177e4 LT |
1310 | * success as well). Returns a negated errno value in case of error. |
1311 | * | |
1312 | * Note: most ioctls are forward onto the block subsystem or further | |
3a4fa0a2 | 1313 | * down in the scsi subsystem. |
1da177e4 | 1314 | **/ |
0338e291 | 1315 | static int sd_ioctl(struct block_device *bdev, fmode_t mode, |
1da177e4 LT |
1316 | unsigned int cmd, unsigned long arg) |
1317 | { | |
1da177e4 | 1318 | struct gendisk *disk = bdev->bd_disk; |
fe2d1851 NN |
1319 | struct scsi_disk *sdkp = scsi_disk(disk); |
1320 | struct scsi_device *sdp = sdkp->device; | |
1da177e4 LT |
1321 | void __user *p = (void __user *)arg; |
1322 | int error; | |
1323 | ||
fe2d1851 NN |
1324 | SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO, sdkp, "sd_ioctl: disk=%s, " |
1325 | "cmd=0x%x\n", disk->disk_name, cmd)); | |
1da177e4 | 1326 | |
0bfc96cb PB |
1327 | error = scsi_verify_blk_ioctl(bdev, cmd); |
1328 | if (error < 0) | |
1329 | return error; | |
1330 | ||
1da177e4 LT |
1331 | /* |
1332 | * If we are in the middle of error recovery, don't let anyone | |
1333 | * else try and use this device. Also, if error recovery fails, it | |
1334 | * may try and take the device offline, in which case all further | |
1335 | * access to the device is prohibited. | |
1336 | */ | |
83ff6fe8 | 1337 | error = scsi_nonblockable_ioctl(sdp, cmd, p, |
fd4ce1ac | 1338 | (mode & FMODE_NDELAY) != 0); |
1da177e4 | 1339 | if (!scsi_block_when_processing_errors(sdp) || !error) |
8a6cfeb6 | 1340 | goto out; |
1da177e4 | 1341 | |
1da177e4 LT |
1342 | /* |
1343 | * Send SCSI addressing ioctls directly to mid level, send other | |
1344 | * ioctls to block level and then onto mid level if they can't be | |
1345 | * resolved. | |
1346 | */ | |
1347 | switch (cmd) { | |
1348 | case SCSI_IOCTL_GET_IDLUN: | |
1349 | case SCSI_IOCTL_GET_BUS_NUMBER: | |
8a6cfeb6 AB |
1350 | error = scsi_ioctl(sdp, cmd, p); |
1351 | break; | |
1da177e4 | 1352 | default: |
577ebb37 | 1353 | error = scsi_cmd_blk_ioctl(bdev, mode, cmd, p); |
1da177e4 | 1354 | if (error != -ENOTTY) |
8a6cfeb6 AB |
1355 | break; |
1356 | error = scsi_ioctl(sdp, cmd, p); | |
1357 | break; | |
1da177e4 | 1358 | } |
8a6cfeb6 | 1359 | out: |
8a6cfeb6 | 1360 | return error; |
1da177e4 LT |
1361 | } |
1362 | ||
1363 | static void set_media_not_present(struct scsi_disk *sdkp) | |
1364 | { | |
2bae0093 TH |
1365 | if (sdkp->media_present) |
1366 | sdkp->device->changed = 1; | |
1367 | ||
1368 | if (sdkp->device->removable) { | |
1369 | sdkp->media_present = 0; | |
1370 | sdkp->capacity = 0; | |
1371 | } | |
1372 | } | |
1373 | ||
1374 | static int media_not_present(struct scsi_disk *sdkp, | |
1375 | struct scsi_sense_hdr *sshdr) | |
1376 | { | |
1377 | if (!scsi_sense_valid(sshdr)) | |
1378 | return 0; | |
1379 | ||
1380 | /* not invoked for commands that could return deferred errors */ | |
1381 | switch (sshdr->sense_key) { | |
1382 | case UNIT_ATTENTION: | |
1383 | case NOT_READY: | |
1384 | /* medium not present */ | |
1385 | if (sshdr->asc == 0x3A) { | |
1386 | set_media_not_present(sdkp); | |
1387 | return 1; | |
1388 | } | |
1389 | } | |
1390 | return 0; | |
1da177e4 LT |
1391 | } |
1392 | ||
1393 | /** | |
2bae0093 TH |
1394 | * sd_check_events - check media events |
1395 | * @disk: kernel device descriptor | |
1396 | * @clearing: disk events currently being cleared | |
1da177e4 | 1397 | * |
2bae0093 | 1398 | * Returns mask of DISK_EVENT_*. |
1da177e4 LT |
1399 | * |
1400 | * Note: this function is invoked from the block subsystem. | |
1401 | **/ | |
2bae0093 | 1402 | static unsigned int sd_check_events(struct gendisk *disk, unsigned int clearing) |
1da177e4 LT |
1403 | { |
1404 | struct scsi_disk *sdkp = scsi_disk(disk); | |
1405 | struct scsi_device *sdp = sdkp->device; | |
001aac25 | 1406 | struct scsi_sense_hdr *sshdr = NULL; |
1da177e4 LT |
1407 | int retval; |
1408 | ||
2bae0093 | 1409 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_check_events\n")); |
1da177e4 LT |
1410 | |
1411 | /* | |
1412 | * If the device is offline, don't send any commands - just pretend as | |
1413 | * if the command failed. If the device ever comes back online, we | |
1414 | * can deal with it then. It is only because of unrecoverable errors | |
1415 | * that we would ever take a device offline in the first place. | |
1416 | */ | |
285e9670 KS |
1417 | if (!scsi_device_online(sdp)) { |
1418 | set_media_not_present(sdkp); | |
285e9670 KS |
1419 | goto out; |
1420 | } | |
1da177e4 LT |
1421 | |
1422 | /* | |
1423 | * Using TEST_UNIT_READY enables differentiation between drive with | |
1424 | * no cartridge loaded - NOT READY, drive with changed cartridge - | |
1425 | * UNIT ATTENTION, or with same cartridge - GOOD STATUS. | |
1426 | * | |
1427 | * Drives that auto spin down. eg iomega jaz 1G, will be started | |
1428 | * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever | |
1429 | * sd_revalidate() is called. | |
1430 | */ | |
1431 | retval = -ENODEV; | |
285e9670 | 1432 | |
001aac25 JB |
1433 | if (scsi_block_when_processing_errors(sdp)) { |
1434 | sshdr = kzalloc(sizeof(*sshdr), GFP_KERNEL); | |
1435 | retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, SD_MAX_RETRIES, | |
1436 | sshdr); | |
1437 | } | |
1da177e4 | 1438 | |
2bae0093 TH |
1439 | /* failed to execute TUR, assume media not present */ |
1440 | if (host_byte(retval)) { | |
285e9670 | 1441 | set_media_not_present(sdkp); |
285e9670 KS |
1442 | goto out; |
1443 | } | |
1da177e4 | 1444 | |
2bae0093 TH |
1445 | if (media_not_present(sdkp, sshdr)) |
1446 | goto out; | |
1447 | ||
1da177e4 LT |
1448 | /* |
1449 | * For removable scsi disk we have to recognise the presence | |
2bae0093 | 1450 | * of a disk in the drive. |
1da177e4 | 1451 | */ |
2bae0093 TH |
1452 | if (!sdkp->media_present) |
1453 | sdp->changed = 1; | |
1da177e4 | 1454 | sdkp->media_present = 1; |
285e9670 | 1455 | out: |
3ff5588d | 1456 | /* |
2bae0093 | 1457 | * sdp->changed is set under the following conditions: |
3ff5588d | 1458 | * |
2bae0093 TH |
1459 | * Medium present state has changed in either direction. |
1460 | * Device has indicated UNIT_ATTENTION. | |
3ff5588d | 1461 | */ |
001aac25 | 1462 | kfree(sshdr); |
2bae0093 TH |
1463 | retval = sdp->changed ? DISK_EVENT_MEDIA_CHANGE : 0; |
1464 | sdp->changed = 0; | |
1da177e4 | 1465 | return retval; |
1da177e4 LT |
1466 | } |
1467 | ||
e73aec82 | 1468 | static int sd_sync_cache(struct scsi_disk *sdkp) |
1da177e4 | 1469 | { |
1da177e4 | 1470 | int retries, res; |
e73aec82 | 1471 | struct scsi_device *sdp = sdkp->device; |
7e660100 JB |
1472 | const int timeout = sdp->request_queue->rq_timeout |
1473 | * SD_FLUSH_TIMEOUT_MULTIPLIER; | |
ea73a9f2 | 1474 | struct scsi_sense_hdr sshdr; |
1da177e4 LT |
1475 | |
1476 | if (!scsi_device_online(sdp)) | |
1477 | return -ENODEV; | |
1478 | ||
1da177e4 LT |
1479 | for (retries = 3; retries > 0; --retries) { |
1480 | unsigned char cmd[10] = { 0 }; | |
1481 | ||
1482 | cmd[0] = SYNCHRONIZE_CACHE; | |
1483 | /* | |
1484 | * Leave the rest of the command zero to indicate | |
1485 | * flush everything. | |
1486 | */ | |
9b21493c | 1487 | res = scsi_execute_req_flags(sdp, cmd, DMA_NONE, NULL, 0, |
7e660100 JB |
1488 | &sshdr, timeout, SD_MAX_RETRIES, |
1489 | NULL, REQ_PM); | |
ea73a9f2 | 1490 | if (res == 0) |
1da177e4 LT |
1491 | break; |
1492 | } | |
1493 | ||
e73aec82 MP |
1494 | if (res) { |
1495 | sd_print_result(sdkp, res); | |
95897910 | 1496 | |
e73aec82 MP |
1497 | if (driver_byte(res) & DRIVER_SENSE) |
1498 | sd_print_sense_hdr(sdkp, &sshdr); | |
95897910 ON |
1499 | /* we need to evaluate the error return */ |
1500 | if (scsi_sense_valid(&sshdr) && | |
7aae5134 AS |
1501 | (sshdr.asc == 0x3a || /* medium not present */ |
1502 | sshdr.asc == 0x20)) /* invalid command */ | |
95897910 ON |
1503 | /* this is no error here */ |
1504 | return 0; | |
1505 | ||
1506 | switch (host_byte(res)) { | |
1507 | /* ignore errors due to racing a disconnection */ | |
1508 | case DID_BAD_TARGET: | |
1509 | case DID_NO_CONNECT: | |
1510 | return 0; | |
1511 | /* signal the upper layer it might try again */ | |
1512 | case DID_BUS_BUSY: | |
1513 | case DID_IMM_RETRY: | |
1514 | case DID_REQUEUE: | |
1515 | case DID_SOFT_ERROR: | |
1516 | return -EBUSY; | |
1517 | default: | |
1518 | return -EIO; | |
1519 | } | |
1da177e4 | 1520 | } |
3721050a | 1521 | return 0; |
1da177e4 LT |
1522 | } |
1523 | ||
1da177e4 LT |
1524 | static void sd_rescan(struct device *dev) |
1525 | { | |
39b7f1e2 AS |
1526 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
1527 | ||
1528 | if (sdkp) { | |
f98a8cae | 1529 | revalidate_disk(sdkp->disk); |
39b7f1e2 AS |
1530 | scsi_disk_put(sdkp); |
1531 | } | |
1da177e4 LT |
1532 | } |
1533 | ||
1534 | ||
1535 | #ifdef CONFIG_COMPAT | |
1536 | /* | |
1537 | * This gets directly called from VFS. When the ioctl | |
1538 | * is not recognized we go back to the other translation paths. | |
1539 | */ | |
0338e291 AV |
1540 | static int sd_compat_ioctl(struct block_device *bdev, fmode_t mode, |
1541 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1542 | { |
0338e291 | 1543 | struct scsi_device *sdev = scsi_disk(bdev->bd_disk)->device; |
0bfc96cb PB |
1544 | int ret; |
1545 | ||
1546 | ret = scsi_verify_blk_ioctl(bdev, cmd); | |
1547 | if (ret < 0) | |
1548 | return ret; | |
1da177e4 LT |
1549 | |
1550 | /* | |
1551 | * If we are in the middle of error recovery, don't let anyone | |
1552 | * else try and use this device. Also, if error recovery fails, it | |
1553 | * may try and take the device offline, in which case all further | |
1554 | * access to the device is prohibited. | |
1555 | */ | |
1556 | if (!scsi_block_when_processing_errors(sdev)) | |
1557 | return -ENODEV; | |
1558 | ||
1559 | if (sdev->host->hostt->compat_ioctl) { | |
1da177e4 LT |
1560 | ret = sdev->host->hostt->compat_ioctl(sdev, cmd, (void __user *)arg); |
1561 | ||
1562 | return ret; | |
1563 | } | |
1564 | ||
1565 | /* | |
1566 | * Let the static ioctl translation table take care of it. | |
1567 | */ | |
1568 | return -ENOIOCTLCMD; | |
1569 | } | |
1570 | #endif | |
1571 | ||
83d5cde4 | 1572 | static const struct block_device_operations sd_fops = { |
1da177e4 | 1573 | .owner = THIS_MODULE, |
0338e291 AV |
1574 | .open = sd_open, |
1575 | .release = sd_release, | |
8a6cfeb6 | 1576 | .ioctl = sd_ioctl, |
a885c8c4 | 1577 | .getgeo = sd_getgeo, |
1da177e4 | 1578 | #ifdef CONFIG_COMPAT |
0338e291 | 1579 | .compat_ioctl = sd_compat_ioctl, |
1da177e4 | 1580 | #endif |
2bae0093 | 1581 | .check_events = sd_check_events, |
1da177e4 | 1582 | .revalidate_disk = sd_revalidate_disk, |
72ec24bd | 1583 | .unlock_native_capacity = sd_unlock_native_capacity, |
1da177e4 LT |
1584 | }; |
1585 | ||
18a4d0a2 MP |
1586 | /** |
1587 | * sd_eh_action - error handling callback | |
1588 | * @scmd: sd-issued command that has failed | |
18a4d0a2 MP |
1589 | * @eh_disp: The recovery disposition suggested by the midlayer |
1590 | * | |
2451079b JB |
1591 | * This function is called by the SCSI midlayer upon completion of an |
1592 | * error test command (currently TEST UNIT READY). The result of sending | |
1593 | * the eh command is passed in eh_disp. We're looking for devices that | |
1594 | * fail medium access commands but are OK with non access commands like | |
1595 | * test unit ready (so wrongly see the device as having a successful | |
1596 | * recovery) | |
18a4d0a2 | 1597 | **/ |
2451079b | 1598 | static int sd_eh_action(struct scsi_cmnd *scmd, int eh_disp) |
18a4d0a2 MP |
1599 | { |
1600 | struct scsi_disk *sdkp = scsi_disk(scmd->request->rq_disk); | |
1601 | ||
1602 | if (!scsi_device_online(scmd->device) || | |
2451079b JB |
1603 | !scsi_medium_access_command(scmd) || |
1604 | host_byte(scmd->result) != DID_TIME_OUT || | |
1605 | eh_disp != SUCCESS) | |
18a4d0a2 MP |
1606 | return eh_disp; |
1607 | ||
1608 | /* | |
1609 | * The device has timed out executing a medium access command. | |
1610 | * However, the TEST UNIT READY command sent during error | |
1611 | * handling completed successfully. Either the device is in the | |
1612 | * process of recovering or has it suffered an internal failure | |
1613 | * that prevents access to the storage medium. | |
1614 | */ | |
2451079b | 1615 | sdkp->medium_access_timed_out++; |
18a4d0a2 MP |
1616 | |
1617 | /* | |
1618 | * If the device keeps failing read/write commands but TEST UNIT | |
1619 | * READY always completes successfully we assume that medium | |
1620 | * access is no longer possible and take the device offline. | |
1621 | */ | |
1622 | if (sdkp->medium_access_timed_out >= sdkp->max_medium_access_timeouts) { | |
1623 | scmd_printk(KERN_ERR, scmd, | |
1624 | "Medium access timeout failure. Offlining disk!\n"); | |
1625 | scsi_device_set_state(scmd->device, SDEV_OFFLINE); | |
1626 | ||
1627 | return FAILED; | |
1628 | } | |
1629 | ||
1630 | return eh_disp; | |
1631 | } | |
1632 | ||
af55ff67 MP |
1633 | static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd) |
1634 | { | |
83096ebf TH |
1635 | u64 start_lba = blk_rq_pos(scmd->request); |
1636 | u64 end_lba = blk_rq_pos(scmd->request) + (scsi_bufflen(scmd) / 512); | |
af55ff67 MP |
1637 | u64 bad_lba; |
1638 | int info_valid; | |
a8733c7b JB |
1639 | /* |
1640 | * resid is optional but mostly filled in. When it's unused, | |
1641 | * its value is zero, so we assume the whole buffer transferred | |
1642 | */ | |
1643 | unsigned int transferred = scsi_bufflen(scmd) - scsi_get_resid(scmd); | |
1644 | unsigned int good_bytes; | |
af55ff67 | 1645 | |
33659ebb | 1646 | if (scmd->request->cmd_type != REQ_TYPE_FS) |
af55ff67 MP |
1647 | return 0; |
1648 | ||
1649 | info_valid = scsi_get_sense_info_fld(scmd->sense_buffer, | |
1650 | SCSI_SENSE_BUFFERSIZE, | |
1651 | &bad_lba); | |
1652 | if (!info_valid) | |
1653 | return 0; | |
1654 | ||
1655 | if (scsi_bufflen(scmd) <= scmd->device->sector_size) | |
1656 | return 0; | |
1657 | ||
1658 | if (scmd->device->sector_size < 512) { | |
1659 | /* only legitimate sector_size here is 256 */ | |
1660 | start_lba <<= 1; | |
1661 | end_lba <<= 1; | |
1662 | } else { | |
1663 | /* be careful ... don't want any overflows */ | |
ef80d1e1 | 1664 | unsigned int factor = scmd->device->sector_size / 512; |
af55ff67 MP |
1665 | do_div(start_lba, factor); |
1666 | do_div(end_lba, factor); | |
1667 | } | |
1668 | ||
1669 | /* The bad lba was reported incorrectly, we have no idea where | |
1670 | * the error is. | |
1671 | */ | |
1672 | if (bad_lba < start_lba || bad_lba >= end_lba) | |
1673 | return 0; | |
1674 | ||
1675 | /* This computation should always be done in terms of | |
1676 | * the resolution of the device's medium. | |
1677 | */ | |
a8733c7b JB |
1678 | good_bytes = (bad_lba - start_lba) * scmd->device->sector_size; |
1679 | return min(good_bytes, transferred); | |
af55ff67 MP |
1680 | } |
1681 | ||
1da177e4 | 1682 | /** |
7b3d9545 | 1683 | * sd_done - bottom half handler: called when the lower level |
1da177e4 LT |
1684 | * driver has completed (successfully or otherwise) a scsi command. |
1685 | * @SCpnt: mid-level's per command structure. | |
1686 | * | |
1687 | * Note: potentially run from within an ISR. Must not block. | |
1688 | **/ | |
7b3d9545 | 1689 | static int sd_done(struct scsi_cmnd *SCpnt) |
1da177e4 LT |
1690 | { |
1691 | int result = SCpnt->result; | |
af55ff67 | 1692 | unsigned int good_bytes = result ? 0 : scsi_bufflen(SCpnt); |
1da177e4 | 1693 | struct scsi_sense_hdr sshdr; |
4e7392ec | 1694 | struct scsi_disk *sdkp = scsi_disk(SCpnt->request->rq_disk); |
26e85fcd | 1695 | struct request *req = SCpnt->request; |
1da177e4 LT |
1696 | int sense_valid = 0; |
1697 | int sense_deferred = 0; | |
c98a0eb0 | 1698 | unsigned char op = SCpnt->cmnd[0]; |
5db44863 | 1699 | unsigned char unmap = SCpnt->cmnd[1] & 8; |
1da177e4 | 1700 | |
5db44863 | 1701 | if (req->cmd_flags & REQ_DISCARD || req->cmd_flags & REQ_WRITE_SAME) { |
26e85fcd MP |
1702 | if (!result) { |
1703 | good_bytes = blk_rq_bytes(req); | |
1704 | scsi_set_resid(SCpnt, 0); | |
1705 | } else { | |
1706 | good_bytes = 0; | |
1707 | scsi_set_resid(SCpnt, blk_rq_bytes(req)); | |
1708 | } | |
1709 | } | |
6a32a8ae | 1710 | |
1da177e4 LT |
1711 | if (result) { |
1712 | sense_valid = scsi_command_normalize_sense(SCpnt, &sshdr); | |
1713 | if (sense_valid) | |
1714 | sense_deferred = scsi_sense_is_deferred(&sshdr); | |
1715 | } | |
1da177e4 | 1716 | #ifdef CONFIG_SCSI_LOGGING |
fa0d34be | 1717 | SCSI_LOG_HLCOMPLETE(1, scsi_print_result(SCpnt)); |
1da177e4 | 1718 | if (sense_valid) { |
fa0d34be | 1719 | SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO, SCpnt, |
7b3d9545 | 1720 | "sd_done: sb[respc,sk,asc," |
fa0d34be MP |
1721 | "ascq]=%x,%x,%x,%x\n", |
1722 | sshdr.response_code, | |
1723 | sshdr.sense_key, sshdr.asc, | |
1724 | sshdr.ascq)); | |
1da177e4 LT |
1725 | } |
1726 | #endif | |
2a863ba8 DJ |
1727 | sdkp->medium_access_timed_out = 0; |
1728 | ||
03aba2f7 LT |
1729 | if (driver_byte(result) != DRIVER_SENSE && |
1730 | (!sense_valid || sense_deferred)) | |
1731 | goto out; | |
1732 | ||
1733 | switch (sshdr.sense_key) { | |
1734 | case HARDWARE_ERROR: | |
1735 | case MEDIUM_ERROR: | |
af55ff67 | 1736 | good_bytes = sd_completed_bytes(SCpnt); |
03aba2f7 LT |
1737 | break; |
1738 | case RECOVERED_ERROR: | |
af55ff67 MP |
1739 | good_bytes = scsi_bufflen(SCpnt); |
1740 | break; | |
10dab226 JW |
1741 | case NO_SENSE: |
1742 | /* This indicates a false check condition, so ignore it. An | |
1743 | * unknown amount of data was transferred so treat it as an | |
1744 | * error. | |
1745 | */ | |
1746 | scsi_print_sense("sd", SCpnt); | |
1747 | SCpnt->result = 0; | |
1748 | memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); | |
1749 | break; | |
c98a0eb0 MP |
1750 | case ABORTED_COMMAND: |
1751 | if (sshdr.asc == 0x10) /* DIF: Target detected corruption */ | |
1752 | good_bytes = sd_completed_bytes(SCpnt); | |
1753 | break; | |
1754 | case ILLEGAL_REQUEST: | |
1755 | if (sshdr.asc == 0x10) /* DIX: Host detected corruption */ | |
af55ff67 | 1756 | good_bytes = sd_completed_bytes(SCpnt); |
c98a0eb0 | 1757 | /* INVALID COMMAND OPCODE or INVALID FIELD IN CDB */ |
5db44863 MP |
1758 | if (sshdr.asc == 0x20 || sshdr.asc == 0x24) { |
1759 | switch (op) { | |
1760 | case UNMAP: | |
1761 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
1762 | break; | |
1763 | case WRITE_SAME_16: | |
1764 | case WRITE_SAME: | |
1765 | if (unmap) | |
1766 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
1767 | else { | |
1768 | sdkp->device->no_write_same = 1; | |
1769 | sd_config_write_same(sdkp); | |
1770 | ||
1771 | good_bytes = 0; | |
1772 | req->__data_len = blk_rq_bytes(req); | |
1773 | req->cmd_flags |= REQ_QUIET; | |
1774 | } | |
1775 | } | |
1776 | } | |
03aba2f7 LT |
1777 | break; |
1778 | default: | |
1779 | break; | |
1da177e4 | 1780 | } |
03aba2f7 | 1781 | out: |
af55ff67 MP |
1782 | if (rq_data_dir(SCpnt->request) == READ && scsi_prot_sg_count(SCpnt)) |
1783 | sd_dif_complete(SCpnt, good_bytes); | |
1784 | ||
7b3d9545 | 1785 | return good_bytes; |
1da177e4 LT |
1786 | } |
1787 | ||
1da177e4 LT |
1788 | /* |
1789 | * spinup disk - called only in sd_revalidate_disk() | |
1790 | */ | |
1791 | static void | |
e73aec82 | 1792 | sd_spinup_disk(struct scsi_disk *sdkp) |
ea73a9f2 | 1793 | { |
1da177e4 | 1794 | unsigned char cmd[10]; |
4451e472 | 1795 | unsigned long spintime_expire = 0; |
1da177e4 LT |
1796 | int retries, spintime; |
1797 | unsigned int the_result; | |
1798 | struct scsi_sense_hdr sshdr; | |
1799 | int sense_valid = 0; | |
1800 | ||
1801 | spintime = 0; | |
1802 | ||
1803 | /* Spin up drives, as required. Only do this at boot time */ | |
1804 | /* Spinup needs to be done for module loads too. */ | |
1805 | do { | |
1806 | retries = 0; | |
1807 | ||
1808 | do { | |
1809 | cmd[0] = TEST_UNIT_READY; | |
1810 | memset((void *) &cmd[1], 0, 9); | |
1811 | ||
ea73a9f2 JB |
1812 | the_result = scsi_execute_req(sdkp->device, cmd, |
1813 | DMA_NONE, NULL, 0, | |
1814 | &sshdr, SD_TIMEOUT, | |
f4f4e47e | 1815 | SD_MAX_RETRIES, NULL); |
1da177e4 | 1816 | |
b4d38e38 AS |
1817 | /* |
1818 | * If the drive has indicated to us that it | |
1819 | * doesn't have any media in it, don't bother | |
1820 | * with any more polling. | |
1821 | */ | |
1822 | if (media_not_present(sdkp, &sshdr)) | |
1823 | return; | |
1824 | ||
1da177e4 | 1825 | if (the_result) |
ea73a9f2 | 1826 | sense_valid = scsi_sense_valid(&sshdr); |
1da177e4 LT |
1827 | retries++; |
1828 | } while (retries < 3 && | |
1829 | (!scsi_status_is_good(the_result) || | |
1830 | ((driver_byte(the_result) & DRIVER_SENSE) && | |
1831 | sense_valid && sshdr.sense_key == UNIT_ATTENTION))); | |
1832 | ||
1da177e4 LT |
1833 | if ((driver_byte(the_result) & DRIVER_SENSE) == 0) { |
1834 | /* no sense, TUR either succeeded or failed | |
1835 | * with a status error */ | |
e73aec82 MP |
1836 | if(!spintime && !scsi_status_is_good(the_result)) { |
1837 | sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n"); | |
1838 | sd_print_result(sdkp, the_result); | |
1839 | } | |
1da177e4 LT |
1840 | break; |
1841 | } | |
1842 | ||
1843 | /* | |
1844 | * The device does not want the automatic start to be issued. | |
1845 | */ | |
33dd6f92 | 1846 | if (sdkp->device->no_start_on_add) |
1da177e4 | 1847 | break; |
1da177e4 | 1848 | |
33dd6f92 MW |
1849 | if (sense_valid && sshdr.sense_key == NOT_READY) { |
1850 | if (sshdr.asc == 4 && sshdr.ascq == 3) | |
1851 | break; /* manual intervention required */ | |
1852 | if (sshdr.asc == 4 && sshdr.ascq == 0xb) | |
1853 | break; /* standby */ | |
1854 | if (sshdr.asc == 4 && sshdr.ascq == 0xc) | |
1855 | break; /* unavailable */ | |
1856 | /* | |
1857 | * Issue command to spin up drive when not ready | |
1858 | */ | |
1da177e4 | 1859 | if (!spintime) { |
e73aec82 | 1860 | sd_printk(KERN_NOTICE, sdkp, "Spinning up disk..."); |
1da177e4 LT |
1861 | cmd[0] = START_STOP; |
1862 | cmd[1] = 1; /* Return immediately */ | |
1863 | memset((void *) &cmd[2], 0, 8); | |
1864 | cmd[4] = 1; /* Start spin cycle */ | |
d2886ea3 SR |
1865 | if (sdkp->device->start_stop_pwr_cond) |
1866 | cmd[4] |= 1 << 4; | |
ea73a9f2 JB |
1867 | scsi_execute_req(sdkp->device, cmd, DMA_NONE, |
1868 | NULL, 0, &sshdr, | |
f4f4e47e FT |
1869 | SD_TIMEOUT, SD_MAX_RETRIES, |
1870 | NULL); | |
4451e472 AS |
1871 | spintime_expire = jiffies + 100 * HZ; |
1872 | spintime = 1; | |
1da177e4 | 1873 | } |
1da177e4 LT |
1874 | /* Wait 1 second for next try */ |
1875 | msleep(1000); | |
1876 | printk("."); | |
4451e472 AS |
1877 | |
1878 | /* | |
1879 | * Wait for USB flash devices with slow firmware. | |
1880 | * Yes, this sense key/ASC combination shouldn't | |
1881 | * occur here. It's characteristic of these devices. | |
1882 | */ | |
1883 | } else if (sense_valid && | |
1884 | sshdr.sense_key == UNIT_ATTENTION && | |
1885 | sshdr.asc == 0x28) { | |
1886 | if (!spintime) { | |
1887 | spintime_expire = jiffies + 5 * HZ; | |
1888 | spintime = 1; | |
1889 | } | |
1890 | /* Wait 1 second for next try */ | |
1891 | msleep(1000); | |
1da177e4 LT |
1892 | } else { |
1893 | /* we don't understand the sense code, so it's | |
1894 | * probably pointless to loop */ | |
1895 | if(!spintime) { | |
e73aec82 MP |
1896 | sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n"); |
1897 | sd_print_sense_hdr(sdkp, &sshdr); | |
1da177e4 LT |
1898 | } |
1899 | break; | |
1900 | } | |
1901 | ||
4451e472 | 1902 | } while (spintime && time_before_eq(jiffies, spintime_expire)); |
1da177e4 LT |
1903 | |
1904 | if (spintime) { | |
1905 | if (scsi_status_is_good(the_result)) | |
1906 | printk("ready\n"); | |
1907 | else | |
1908 | printk("not responding...\n"); | |
1909 | } | |
1910 | } | |
1911 | ||
e0597d70 MP |
1912 | |
1913 | /* | |
1914 | * Determine whether disk supports Data Integrity Field. | |
1915 | */ | |
fe542396 | 1916 | static int sd_read_protection_type(struct scsi_disk *sdkp, unsigned char *buffer) |
e0597d70 MP |
1917 | { |
1918 | struct scsi_device *sdp = sdkp->device; | |
1919 | u8 type; | |
fe542396 | 1920 | int ret = 0; |
e0597d70 MP |
1921 | |
1922 | if (scsi_device_protection(sdp) == 0 || (buffer[12] & 1) == 0) | |
fe542396 | 1923 | return ret; |
35e1a5d9 MP |
1924 | |
1925 | type = ((buffer[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */ | |
1926 | ||
fe542396 MP |
1927 | if (type > SD_DIF_TYPE3_PROTECTION) |
1928 | ret = -ENODEV; | |
1929 | else if (scsi_host_dif_capable(sdp->host, type)) | |
1930 | ret = 1; | |
1931 | ||
1932 | if (sdkp->first_scan || type != sdkp->protection_type) | |
1933 | switch (ret) { | |
1934 | case -ENODEV: | |
1935 | sd_printk(KERN_ERR, sdkp, "formatted with unsupported" \ | |
1936 | " protection type %u. Disabling disk!\n", | |
1937 | type); | |
1938 | break; | |
1939 | case 1: | |
1940 | sd_printk(KERN_NOTICE, sdkp, | |
1941 | "Enabling DIF Type %u protection\n", type); | |
1942 | break; | |
1943 | case 0: | |
1944 | sd_printk(KERN_NOTICE, sdkp, | |
1945 | "Disabling DIF Type %u protection\n", type); | |
1946 | break; | |
1947 | } | |
e0597d70 | 1948 | |
be922f47 MP |
1949 | sdkp->protection_type = type; |
1950 | ||
fe542396 | 1951 | return ret; |
e0597d70 MP |
1952 | } |
1953 | ||
0da205e0 MW |
1954 | static void read_capacity_error(struct scsi_disk *sdkp, struct scsi_device *sdp, |
1955 | struct scsi_sense_hdr *sshdr, int sense_valid, | |
1956 | int the_result) | |
1957 | { | |
1958 | sd_print_result(sdkp, the_result); | |
1959 | if (driver_byte(the_result) & DRIVER_SENSE) | |
1960 | sd_print_sense_hdr(sdkp, sshdr); | |
1961 | else | |
1962 | sd_printk(KERN_NOTICE, sdkp, "Sense not available.\n"); | |
1963 | ||
1964 | /* | |
1965 | * Set dirty bit for removable devices if not ready - | |
1966 | * sometimes drives will not report this properly. | |
1967 | */ | |
1968 | if (sdp->removable && | |
1969 | sense_valid && sshdr->sense_key == NOT_READY) | |
2bae0093 | 1970 | set_media_not_present(sdkp); |
0da205e0 MW |
1971 | |
1972 | /* | |
1973 | * We used to set media_present to 0 here to indicate no media | |
1974 | * in the drive, but some drives fail read capacity even with | |
1975 | * media present, so we can't do that. | |
1976 | */ | |
1977 | sdkp->capacity = 0; /* unknown mapped to zero - as usual */ | |
1978 | } | |
1979 | ||
1980 | #define RC16_LEN 32 | |
1981 | #if RC16_LEN > SD_BUF_SIZE | |
1982 | #error RC16_LEN must not be more than SD_BUF_SIZE | |
1983 | #endif | |
1984 | ||
3233ac19 JB |
1985 | #define READ_CAPACITY_RETRIES_ON_RESET 10 |
1986 | ||
0da205e0 MW |
1987 | static int read_capacity_16(struct scsi_disk *sdkp, struct scsi_device *sdp, |
1988 | unsigned char *buffer) | |
ea73a9f2 | 1989 | { |
1da177e4 | 1990 | unsigned char cmd[16]; |
1da177e4 LT |
1991 | struct scsi_sense_hdr sshdr; |
1992 | int sense_valid = 0; | |
0da205e0 | 1993 | int the_result; |
3233ac19 | 1994 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
ea09bcc9 | 1995 | unsigned int alignment; |
0da205e0 MW |
1996 | unsigned long long lba; |
1997 | unsigned sector_size; | |
1da177e4 | 1998 | |
5ce524bd HG |
1999 | if (sdp->no_read_capacity_16) |
2000 | return -EINVAL; | |
2001 | ||
1da177e4 | 2002 | do { |
0da205e0 MW |
2003 | memset(cmd, 0, 16); |
2004 | cmd[0] = SERVICE_ACTION_IN; | |
2005 | cmd[1] = SAI_READ_CAPACITY_16; | |
2006 | cmd[13] = RC16_LEN; | |
2007 | memset(buffer, 0, RC16_LEN); | |
2008 | ||
ea73a9f2 | 2009 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, |
0da205e0 MW |
2010 | buffer, RC16_LEN, &sshdr, |
2011 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
1da177e4 | 2012 | |
ea73a9f2 | 2013 | if (media_not_present(sdkp, &sshdr)) |
0da205e0 | 2014 | return -ENODEV; |
1da177e4 | 2015 | |
2b301307 | 2016 | if (the_result) { |
ea73a9f2 | 2017 | sense_valid = scsi_sense_valid(&sshdr); |
2b301307 MW |
2018 | if (sense_valid && |
2019 | sshdr.sense_key == ILLEGAL_REQUEST && | |
2020 | (sshdr.asc == 0x20 || sshdr.asc == 0x24) && | |
2021 | sshdr.ascq == 0x00) | |
2022 | /* Invalid Command Operation Code or | |
2023 | * Invalid Field in CDB, just retry | |
2024 | * silently with RC10 */ | |
2025 | return -EINVAL; | |
3233ac19 JB |
2026 | if (sense_valid && |
2027 | sshdr.sense_key == UNIT_ATTENTION && | |
2028 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) | |
2029 | /* Device reset might occur several times, | |
2030 | * give it one more chance */ | |
2031 | if (--reset_retries > 0) | |
2032 | continue; | |
2b301307 | 2033 | } |
1da177e4 LT |
2034 | retries--; |
2035 | ||
2036 | } while (the_result && retries); | |
2037 | ||
0da205e0 | 2038 | if (the_result) { |
e73aec82 | 2039 | sd_printk(KERN_NOTICE, sdkp, "READ CAPACITY(16) failed\n"); |
0da205e0 MW |
2040 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); |
2041 | return -EINVAL; | |
2042 | } | |
e73aec82 | 2043 | |
8f76d151 DH |
2044 | sector_size = get_unaligned_be32(&buffer[8]); |
2045 | lba = get_unaligned_be64(&buffer[0]); | |
0da205e0 | 2046 | |
fe542396 MP |
2047 | if (sd_read_protection_type(sdkp, buffer) < 0) { |
2048 | sdkp->capacity = 0; | |
2049 | return -ENODEV; | |
2050 | } | |
0da205e0 MW |
2051 | |
2052 | if ((sizeof(sdkp->capacity) == 4) && (lba >= 0xffffffffULL)) { | |
2053 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a " | |
2054 | "kernel compiled with support for large block " | |
2055 | "devices.\n"); | |
2056 | sdkp->capacity = 0; | |
2057 | return -EOVERFLOW; | |
2058 | } | |
2059 | ||
ea09bcc9 | 2060 | /* Logical blocks per physical block exponent */ |
526f7c79 | 2061 | sdkp->physical_block_size = (1 << (buffer[13] & 0xf)) * sector_size; |
ea09bcc9 MP |
2062 | |
2063 | /* Lowest aligned logical block */ | |
2064 | alignment = ((buffer[14] & 0x3f) << 8 | buffer[15]) * sector_size; | |
2065 | blk_queue_alignment_offset(sdp->request_queue, alignment); | |
2066 | if (alignment && sdkp->first_scan) | |
2067 | sd_printk(KERN_NOTICE, sdkp, | |
2068 | "physical block alignment offset: %u\n", alignment); | |
2069 | ||
c98a0eb0 MP |
2070 | if (buffer[14] & 0x80) { /* LBPME */ |
2071 | sdkp->lbpme = 1; | |
e339c1a7 | 2072 | |
c98a0eb0 MP |
2073 | if (buffer[14] & 0x40) /* LBPRZ */ |
2074 | sdkp->lbprz = 1; | |
e339c1a7 | 2075 | |
c98a0eb0 | 2076 | sd_config_discard(sdkp, SD_LBP_WS16); |
e339c1a7 MP |
2077 | } |
2078 | ||
0da205e0 MW |
2079 | sdkp->capacity = lba + 1; |
2080 | return sector_size; | |
2081 | } | |
2082 | ||
2083 | static int read_capacity_10(struct scsi_disk *sdkp, struct scsi_device *sdp, | |
2084 | unsigned char *buffer) | |
2085 | { | |
2086 | unsigned char cmd[16]; | |
2087 | struct scsi_sense_hdr sshdr; | |
2088 | int sense_valid = 0; | |
2089 | int the_result; | |
3233ac19 | 2090 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
0da205e0 MW |
2091 | sector_t lba; |
2092 | unsigned sector_size; | |
2093 | ||
2094 | do { | |
2095 | cmd[0] = READ_CAPACITY; | |
2096 | memset(&cmd[1], 0, 9); | |
2097 | memset(buffer, 0, 8); | |
2098 | ||
2099 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, | |
2100 | buffer, 8, &sshdr, | |
2101 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
2102 | ||
2103 | if (media_not_present(sdkp, &sshdr)) | |
2104 | return -ENODEV; | |
2105 | ||
3233ac19 | 2106 | if (the_result) { |
0da205e0 | 2107 | sense_valid = scsi_sense_valid(&sshdr); |
3233ac19 JB |
2108 | if (sense_valid && |
2109 | sshdr.sense_key == UNIT_ATTENTION && | |
2110 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) | |
2111 | /* Device reset might occur several times, | |
2112 | * give it one more chance */ | |
2113 | if (--reset_retries > 0) | |
2114 | continue; | |
2115 | } | |
0da205e0 MW |
2116 | retries--; |
2117 | ||
2118 | } while (the_result && retries); | |
2119 | ||
2120 | if (the_result) { | |
2121 | sd_printk(KERN_NOTICE, sdkp, "READ CAPACITY failed\n"); | |
2122 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); | |
2123 | return -EINVAL; | |
2124 | } | |
2125 | ||
8f76d151 DH |
2126 | sector_size = get_unaligned_be32(&buffer[4]); |
2127 | lba = get_unaligned_be32(&buffer[0]); | |
0da205e0 | 2128 | |
5ce524bd HG |
2129 | if (sdp->no_read_capacity_16 && (lba == 0xffffffff)) { |
2130 | /* Some buggy (usb cardreader) devices return an lba of | |
2131 | 0xffffffff when the want to report a size of 0 (with | |
2132 | which they really mean no media is present) */ | |
2133 | sdkp->capacity = 0; | |
5cc10350 | 2134 | sdkp->physical_block_size = sector_size; |
5ce524bd HG |
2135 | return sector_size; |
2136 | } | |
2137 | ||
0da205e0 MW |
2138 | if ((sizeof(sdkp->capacity) == 4) && (lba == 0xffffffff)) { |
2139 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a " | |
2140 | "kernel compiled with support for large block " | |
2141 | "devices.\n"); | |
2142 | sdkp->capacity = 0; | |
2143 | return -EOVERFLOW; | |
2144 | } | |
2145 | ||
2146 | sdkp->capacity = lba + 1; | |
526f7c79 | 2147 | sdkp->physical_block_size = sector_size; |
0da205e0 MW |
2148 | return sector_size; |
2149 | } | |
2150 | ||
2b301307 MW |
2151 | static int sd_try_rc16_first(struct scsi_device *sdp) |
2152 | { | |
f87146bb HR |
2153 | if (sdp->host->max_cmd_len < 16) |
2154 | return 0; | |
6a0bdffa AS |
2155 | if (sdp->try_rc_10_first) |
2156 | return 0; | |
2b301307 MW |
2157 | if (sdp->scsi_level > SCSI_SPC_2) |
2158 | return 1; | |
2159 | if (scsi_device_protection(sdp)) | |
2160 | return 1; | |
2161 | return 0; | |
2162 | } | |
2163 | ||
0da205e0 MW |
2164 | /* |
2165 | * read disk capacity | |
2166 | */ | |
2167 | static void | |
2168 | sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer) | |
2169 | { | |
2170 | int sector_size; | |
2171 | struct scsi_device *sdp = sdkp->device; | |
70a9b873 | 2172 | sector_t old_capacity = sdkp->capacity; |
0da205e0 | 2173 | |
2b301307 | 2174 | if (sd_try_rc16_first(sdp)) { |
0da205e0 MW |
2175 | sector_size = read_capacity_16(sdkp, sdp, buffer); |
2176 | if (sector_size == -EOVERFLOW) | |
1da177e4 | 2177 | goto got_data; |
2b301307 MW |
2178 | if (sector_size == -ENODEV) |
2179 | return; | |
2180 | if (sector_size < 0) | |
2181 | sector_size = read_capacity_10(sdkp, sdp, buffer); | |
0da205e0 MW |
2182 | if (sector_size < 0) |
2183 | return; | |
1da177e4 | 2184 | } else { |
0da205e0 MW |
2185 | sector_size = read_capacity_10(sdkp, sdp, buffer); |
2186 | if (sector_size == -EOVERFLOW) | |
2187 | goto got_data; | |
2188 | if (sector_size < 0) | |
2189 | return; | |
2190 | if ((sizeof(sdkp->capacity) > 4) && | |
2191 | (sdkp->capacity > 0xffffffffULL)) { | |
2192 | int old_sector_size = sector_size; | |
2193 | sd_printk(KERN_NOTICE, sdkp, "Very big device. " | |
2194 | "Trying to use READ CAPACITY(16).\n"); | |
2195 | sector_size = read_capacity_16(sdkp, sdp, buffer); | |
2196 | if (sector_size < 0) { | |
2197 | sd_printk(KERN_NOTICE, sdkp, | |
2198 | "Using 0xffffffff as device size\n"); | |
2199 | sdkp->capacity = 1 + (sector_t) 0xffffffff; | |
2200 | sector_size = old_sector_size; | |
2201 | goto got_data; | |
2202 | } | |
2203 | } | |
2204 | } | |
1da177e4 | 2205 | |
5c211caa AS |
2206 | /* Some devices are known to return the total number of blocks, |
2207 | * not the highest block number. Some devices have versions | |
2208 | * which do this and others which do not. Some devices we might | |
2209 | * suspect of doing this but we don't know for certain. | |
2210 | * | |
2211 | * If we know the reported capacity is wrong, decrement it. If | |
2212 | * we can only guess, then assume the number of blocks is even | |
2213 | * (usually true but not always) and err on the side of lowering | |
2214 | * the capacity. | |
2215 | */ | |
2216 | if (sdp->fix_capacity || | |
2217 | (sdp->guess_capacity && (sdkp->capacity & 0x01))) { | |
2218 | sd_printk(KERN_INFO, sdkp, "Adjusting the sector count " | |
2219 | "from its reported value: %llu\n", | |
2220 | (unsigned long long) sdkp->capacity); | |
1da177e4 | 2221 | --sdkp->capacity; |
61bf54b7 ON |
2222 | } |
2223 | ||
1da177e4 LT |
2224 | got_data: |
2225 | if (sector_size == 0) { | |
2226 | sector_size = 512; | |
e73aec82 MP |
2227 | sd_printk(KERN_NOTICE, sdkp, "Sector size 0 reported, " |
2228 | "assuming 512.\n"); | |
1da177e4 LT |
2229 | } |
2230 | ||
2231 | if (sector_size != 512 && | |
2232 | sector_size != 1024 && | |
2233 | sector_size != 2048 && | |
2234 | sector_size != 4096 && | |
2235 | sector_size != 256) { | |
e73aec82 MP |
2236 | sd_printk(KERN_NOTICE, sdkp, "Unsupported sector size %d.\n", |
2237 | sector_size); | |
1da177e4 LT |
2238 | /* |
2239 | * The user might want to re-format the drive with | |
2240 | * a supported sectorsize. Once this happens, it | |
2241 | * would be relatively trivial to set the thing up. | |
2242 | * For this reason, we leave the thing in the table. | |
2243 | */ | |
2244 | sdkp->capacity = 0; | |
2245 | /* | |
2246 | * set a bogus sector size so the normal read/write | |
2247 | * logic in the block layer will eventually refuse any | |
2248 | * request on this device without tripping over power | |
2249 | * of two sector size assumptions | |
2250 | */ | |
2251 | sector_size = 512; | |
2252 | } | |
e1defc4f | 2253 | blk_queue_logical_block_size(sdp->request_queue, sector_size); |
7404ad3b | 2254 | |
1da177e4 | 2255 | { |
7404ad3b | 2256 | char cap_str_2[10], cap_str_10[10]; |
520a2c27 | 2257 | u64 sz = (u64)sdkp->capacity << ilog2(sector_size); |
1da177e4 | 2258 | |
7404ad3b JB |
2259 | string_get_size(sz, STRING_UNITS_2, cap_str_2, |
2260 | sizeof(cap_str_2)); | |
2261 | string_get_size(sz, STRING_UNITS_10, cap_str_10, | |
2262 | sizeof(cap_str_10)); | |
1da177e4 | 2263 | |
ea09bcc9 | 2264 | if (sdkp->first_scan || old_capacity != sdkp->capacity) { |
70a9b873 | 2265 | sd_printk(KERN_NOTICE, sdkp, |
ea09bcc9 | 2266 | "%llu %d-byte logical blocks: (%s/%s)\n", |
70a9b873 MP |
2267 | (unsigned long long)sdkp->capacity, |
2268 | sector_size, cap_str_10, cap_str_2); | |
ea09bcc9 | 2269 | |
526f7c79 | 2270 | if (sdkp->physical_block_size != sector_size) |
ea09bcc9 MP |
2271 | sd_printk(KERN_NOTICE, sdkp, |
2272 | "%u-byte physical blocks\n", | |
526f7c79 | 2273 | sdkp->physical_block_size); |
ea09bcc9 | 2274 | } |
1da177e4 LT |
2275 | } |
2276 | ||
bcdb247c MP |
2277 | if (sdkp->capacity > 0xffffffff) { |
2278 | sdp->use_16_for_rw = 1; | |
2279 | sdkp->max_xfer_blocks = SD_MAX_XFER_BLOCKS; | |
2280 | } else | |
2281 | sdkp->max_xfer_blocks = SD_DEF_XFER_BLOCKS; | |
53ad570b | 2282 | |
1da177e4 LT |
2283 | /* Rescale capacity to 512-byte units */ |
2284 | if (sector_size == 4096) | |
2285 | sdkp->capacity <<= 3; | |
2286 | else if (sector_size == 2048) | |
2287 | sdkp->capacity <<= 2; | |
2288 | else if (sector_size == 1024) | |
2289 | sdkp->capacity <<= 1; | |
2290 | else if (sector_size == 256) | |
2291 | sdkp->capacity >>= 1; | |
2292 | ||
526f7c79 MP |
2293 | blk_queue_physical_block_size(sdp->request_queue, |
2294 | sdkp->physical_block_size); | |
1da177e4 LT |
2295 | sdkp->device->sector_size = sector_size; |
2296 | } | |
2297 | ||
2298 | /* called with buffer of length 512 */ | |
2299 | static inline int | |
ea73a9f2 JB |
2300 | sd_do_mode_sense(struct scsi_device *sdp, int dbd, int modepage, |
2301 | unsigned char *buffer, int len, struct scsi_mode_data *data, | |
2302 | struct scsi_sense_hdr *sshdr) | |
1da177e4 | 2303 | { |
ea73a9f2 | 2304 | return scsi_mode_sense(sdp, dbd, modepage, buffer, len, |
1cf72699 | 2305 | SD_TIMEOUT, SD_MAX_RETRIES, data, |
ea73a9f2 | 2306 | sshdr); |
1da177e4 LT |
2307 | } |
2308 | ||
2309 | /* | |
2310 | * read write protect setting, if possible - called only in sd_revalidate_disk() | |
48970800 | 2311 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
2312 | */ |
2313 | static void | |
e73aec82 | 2314 | sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer) |
ea73a9f2 | 2315 | { |
1da177e4 | 2316 | int res; |
ea73a9f2 | 2317 | struct scsi_device *sdp = sdkp->device; |
1da177e4 | 2318 | struct scsi_mode_data data; |
70a9b873 | 2319 | int old_wp = sdkp->write_prot; |
1da177e4 LT |
2320 | |
2321 | set_disk_ro(sdkp->disk, 0); | |
ea73a9f2 | 2322 | if (sdp->skip_ms_page_3f) { |
b2bff6ce | 2323 | sd_first_printk(KERN_NOTICE, sdkp, "Assuming Write Enabled\n"); |
1da177e4 LT |
2324 | return; |
2325 | } | |
2326 | ||
ea73a9f2 JB |
2327 | if (sdp->use_192_bytes_for_3f) { |
2328 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 192, &data, NULL); | |
1da177e4 LT |
2329 | } else { |
2330 | /* | |
2331 | * First attempt: ask for all pages (0x3F), but only 4 bytes. | |
2332 | * We have to start carefully: some devices hang if we ask | |
2333 | * for more than is available. | |
2334 | */ | |
ea73a9f2 | 2335 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 4, &data, NULL); |
1da177e4 LT |
2336 | |
2337 | /* | |
2338 | * Second attempt: ask for page 0 When only page 0 is | |
2339 | * implemented, a request for page 3F may return Sense Key | |
2340 | * 5: Illegal Request, Sense Code 24: Invalid field in | |
2341 | * CDB. | |
2342 | */ | |
2343 | if (!scsi_status_is_good(res)) | |
ea73a9f2 | 2344 | res = sd_do_mode_sense(sdp, 0, 0, buffer, 4, &data, NULL); |
1da177e4 LT |
2345 | |
2346 | /* | |
2347 | * Third attempt: ask 255 bytes, as we did earlier. | |
2348 | */ | |
2349 | if (!scsi_status_is_good(res)) | |
ea73a9f2 JB |
2350 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 255, |
2351 | &data, NULL); | |
1da177e4 LT |
2352 | } |
2353 | ||
2354 | if (!scsi_status_is_good(res)) { | |
b2bff6ce | 2355 | sd_first_printk(KERN_WARNING, sdkp, |
e73aec82 | 2356 | "Test WP failed, assume Write Enabled\n"); |
1da177e4 LT |
2357 | } else { |
2358 | sdkp->write_prot = ((data.device_specific & 0x80) != 0); | |
2359 | set_disk_ro(sdkp->disk, sdkp->write_prot); | |
70a9b873 MP |
2360 | if (sdkp->first_scan || old_wp != sdkp->write_prot) { |
2361 | sd_printk(KERN_NOTICE, sdkp, "Write Protect is %s\n", | |
2362 | sdkp->write_prot ? "on" : "off"); | |
2363 | sd_printk(KERN_DEBUG, sdkp, | |
2364 | "Mode Sense: %02x %02x %02x %02x\n", | |
2365 | buffer[0], buffer[1], buffer[2], buffer[3]); | |
2366 | } | |
1da177e4 LT |
2367 | } |
2368 | } | |
2369 | ||
2370 | /* | |
2371 | * sd_read_cache_type - called only from sd_revalidate_disk() | |
48970800 | 2372 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
2373 | */ |
2374 | static void | |
e73aec82 | 2375 | sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer) |
631e8a13 | 2376 | { |
1da177e4 | 2377 | int len = 0, res; |
ea73a9f2 | 2378 | struct scsi_device *sdp = sdkp->device; |
1da177e4 | 2379 | |
631e8a13 AV |
2380 | int dbd; |
2381 | int modepage; | |
0bcaa111 | 2382 | int first_len; |
1da177e4 LT |
2383 | struct scsi_mode_data data; |
2384 | struct scsi_sense_hdr sshdr; | |
70a9b873 MP |
2385 | int old_wce = sdkp->WCE; |
2386 | int old_rcd = sdkp->RCD; | |
2387 | int old_dpofua = sdkp->DPOFUA; | |
1da177e4 | 2388 | |
39c60a09 JB |
2389 | |
2390 | if (sdkp->cache_override) | |
2391 | return; | |
2392 | ||
0bcaa111 LT |
2393 | first_len = 4; |
2394 | if (sdp->skip_ms_page_8) { | |
2395 | if (sdp->type == TYPE_RBC) | |
2396 | goto defaults; | |
2397 | else { | |
2398 | if (sdp->skip_ms_page_3f) | |
2399 | goto defaults; | |
2400 | modepage = 0x3F; | |
2401 | if (sdp->use_192_bytes_for_3f) | |
2402 | first_len = 192; | |
2403 | dbd = 0; | |
2404 | } | |
2405 | } else if (sdp->type == TYPE_RBC) { | |
631e8a13 AV |
2406 | modepage = 6; |
2407 | dbd = 8; | |
2408 | } else { | |
2409 | modepage = 8; | |
2410 | dbd = 0; | |
2411 | } | |
2412 | ||
1da177e4 | 2413 | /* cautiously ask */ |
0bcaa111 LT |
2414 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, first_len, |
2415 | &data, &sshdr); | |
1da177e4 LT |
2416 | |
2417 | if (!scsi_status_is_good(res)) | |
2418 | goto bad_sense; | |
2419 | ||
6d73c851 AV |
2420 | if (!data.header_length) { |
2421 | modepage = 6; | |
0bcaa111 | 2422 | first_len = 0; |
b2bff6ce MP |
2423 | sd_first_printk(KERN_ERR, sdkp, |
2424 | "Missing header in MODE_SENSE response\n"); | |
6d73c851 AV |
2425 | } |
2426 | ||
1da177e4 LT |
2427 | /* that went OK, now ask for the proper length */ |
2428 | len = data.length; | |
2429 | ||
2430 | /* | |
2431 | * We're only interested in the first three bytes, actually. | |
2432 | * But the data cache page is defined for the first 20. | |
2433 | */ | |
2434 | if (len < 3) | |
2435 | goto bad_sense; | |
0bcaa111 | 2436 | else if (len > SD_BUF_SIZE) { |
b2bff6ce | 2437 | sd_first_printk(KERN_NOTICE, sdkp, "Truncating mode parameter " |
0bcaa111 LT |
2438 | "data from %d to %d bytes\n", len, SD_BUF_SIZE); |
2439 | len = SD_BUF_SIZE; | |
2440 | } | |
2441 | if (modepage == 0x3F && sdp->use_192_bytes_for_3f) | |
2442 | len = 192; | |
1da177e4 LT |
2443 | |
2444 | /* Get the data */ | |
0bcaa111 LT |
2445 | if (len > first_len) |
2446 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, len, | |
2447 | &data, &sshdr); | |
1da177e4 LT |
2448 | |
2449 | if (scsi_status_is_good(res)) { | |
631e8a13 | 2450 | int offset = data.header_length + data.block_descriptor_length; |
1da177e4 | 2451 | |
0bcaa111 LT |
2452 | while (offset < len) { |
2453 | u8 page_code = buffer[offset] & 0x3F; | |
2454 | u8 spf = buffer[offset] & 0x40; | |
2455 | ||
2456 | if (page_code == 8 || page_code == 6) { | |
2457 | /* We're interested only in the first 3 bytes. | |
2458 | */ | |
2459 | if (len - offset <= 2) { | |
b2bff6ce MP |
2460 | sd_first_printk(KERN_ERR, sdkp, |
2461 | "Incomplete mode parameter " | |
2462 | "data\n"); | |
0bcaa111 LT |
2463 | goto defaults; |
2464 | } else { | |
2465 | modepage = page_code; | |
2466 | goto Page_found; | |
2467 | } | |
2468 | } else { | |
2469 | /* Go to the next page */ | |
2470 | if (spf && len - offset > 3) | |
2471 | offset += 4 + (buffer[offset+2] << 8) + | |
2472 | buffer[offset+3]; | |
2473 | else if (!spf && len - offset > 1) | |
2474 | offset += 2 + buffer[offset+1]; | |
2475 | else { | |
b2bff6ce MP |
2476 | sd_first_printk(KERN_ERR, sdkp, |
2477 | "Incomplete mode " | |
2478 | "parameter data\n"); | |
0bcaa111 LT |
2479 | goto defaults; |
2480 | } | |
2481 | } | |
48970800 AV |
2482 | } |
2483 | ||
b2bff6ce | 2484 | sd_first_printk(KERN_ERR, sdkp, "No Caching mode page found\n"); |
984f1733 AS |
2485 | goto defaults; |
2486 | ||
0bcaa111 | 2487 | Page_found: |
631e8a13 AV |
2488 | if (modepage == 8) { |
2489 | sdkp->WCE = ((buffer[offset + 2] & 0x04) != 0); | |
2490 | sdkp->RCD = ((buffer[offset + 2] & 0x01) != 0); | |
2491 | } else { | |
2492 | sdkp->WCE = ((buffer[offset + 2] & 0x01) == 0); | |
2493 | sdkp->RCD = 0; | |
2494 | } | |
1da177e4 | 2495 | |
007365ad | 2496 | sdkp->DPOFUA = (data.device_specific & 0x10) != 0; |
b14bf2d0 AS |
2497 | if (sdp->broken_fua) { |
2498 | sd_first_printk(KERN_NOTICE, sdkp, "Disabling FUA\n"); | |
2499 | sdkp->DPOFUA = 0; | |
2500 | } else if (sdkp->DPOFUA && !sdkp->device->use_10_for_rw) { | |
b2bff6ce | 2501 | sd_first_printk(KERN_NOTICE, sdkp, |
e73aec82 | 2502 | "Uses READ/WRITE(6), disabling FUA\n"); |
007365ad TH |
2503 | sdkp->DPOFUA = 0; |
2504 | } | |
2505 | ||
2eefd57b SRT |
2506 | /* No cache flush allowed for write protected devices */ |
2507 | if (sdkp->WCE && sdkp->write_prot) | |
2508 | sdkp->WCE = 0; | |
2509 | ||
70a9b873 MP |
2510 | if (sdkp->first_scan || old_wce != sdkp->WCE || |
2511 | old_rcd != sdkp->RCD || old_dpofua != sdkp->DPOFUA) | |
2512 | sd_printk(KERN_NOTICE, sdkp, | |
2513 | "Write cache: %s, read cache: %s, %s\n", | |
2514 | sdkp->WCE ? "enabled" : "disabled", | |
2515 | sdkp->RCD ? "disabled" : "enabled", | |
2516 | sdkp->DPOFUA ? "supports DPO and FUA" | |
2517 | : "doesn't support DPO or FUA"); | |
1da177e4 LT |
2518 | |
2519 | return; | |
2520 | } | |
2521 | ||
2522 | bad_sense: | |
ea73a9f2 | 2523 | if (scsi_sense_valid(&sshdr) && |
1da177e4 LT |
2524 | sshdr.sense_key == ILLEGAL_REQUEST && |
2525 | sshdr.asc == 0x24 && sshdr.ascq == 0x0) | |
e73aec82 | 2526 | /* Invalid field in CDB */ |
b2bff6ce | 2527 | sd_first_printk(KERN_NOTICE, sdkp, "Cache data unavailable\n"); |
1da177e4 | 2528 | else |
b2bff6ce MP |
2529 | sd_first_printk(KERN_ERR, sdkp, |
2530 | "Asking for cache data failed\n"); | |
1da177e4 LT |
2531 | |
2532 | defaults: | |
b81478d8 | 2533 | if (sdp->wce_default_on) { |
b2bff6ce MP |
2534 | sd_first_printk(KERN_NOTICE, sdkp, |
2535 | "Assuming drive cache: write back\n"); | |
b81478d8 NJ |
2536 | sdkp->WCE = 1; |
2537 | } else { | |
b2bff6ce MP |
2538 | sd_first_printk(KERN_ERR, sdkp, |
2539 | "Assuming drive cache: write through\n"); | |
b81478d8 NJ |
2540 | sdkp->WCE = 0; |
2541 | } | |
1da177e4 | 2542 | sdkp->RCD = 0; |
48970800 | 2543 | sdkp->DPOFUA = 0; |
1da177e4 LT |
2544 | } |
2545 | ||
e0597d70 MP |
2546 | /* |
2547 | * The ATO bit indicates whether the DIF application tag is available | |
2548 | * for use by the operating system. | |
2549 | */ | |
439d77f7 | 2550 | static void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer) |
e0597d70 MP |
2551 | { |
2552 | int res, offset; | |
2553 | struct scsi_device *sdp = sdkp->device; | |
2554 | struct scsi_mode_data data; | |
2555 | struct scsi_sense_hdr sshdr; | |
2556 | ||
2557 | if (sdp->type != TYPE_DISK) | |
2558 | return; | |
2559 | ||
2560 | if (sdkp->protection_type == 0) | |
2561 | return; | |
2562 | ||
2563 | res = scsi_mode_sense(sdp, 1, 0x0a, buffer, 36, SD_TIMEOUT, | |
2564 | SD_MAX_RETRIES, &data, &sshdr); | |
2565 | ||
2566 | if (!scsi_status_is_good(res) || !data.header_length || | |
2567 | data.length < 6) { | |
b2bff6ce | 2568 | sd_first_printk(KERN_WARNING, sdkp, |
e0597d70 MP |
2569 | "getting Control mode page failed, assume no ATO\n"); |
2570 | ||
2571 | if (scsi_sense_valid(&sshdr)) | |
2572 | sd_print_sense_hdr(sdkp, &sshdr); | |
2573 | ||
2574 | return; | |
2575 | } | |
2576 | ||
2577 | offset = data.header_length + data.block_descriptor_length; | |
2578 | ||
2579 | if ((buffer[offset] & 0x3f) != 0x0a) { | |
b2bff6ce | 2580 | sd_first_printk(KERN_ERR, sdkp, "ATO Got wrong page\n"); |
e0597d70 MP |
2581 | return; |
2582 | } | |
2583 | ||
2584 | if ((buffer[offset + 5] & 0x80) == 0) | |
2585 | return; | |
2586 | ||
2587 | sdkp->ATO = 1; | |
2588 | ||
2589 | return; | |
2590 | } | |
2591 | ||
d11b6916 MP |
2592 | /** |
2593 | * sd_read_block_limits - Query disk device for preferred I/O sizes. | |
2594 | * @disk: disk to query | |
2595 | */ | |
2596 | static void sd_read_block_limits(struct scsi_disk *sdkp) | |
2597 | { | |
2598 | unsigned int sector_sz = sdkp->device->sector_size; | |
bb2d3de1 | 2599 | const int vpd_len = 64; |
bcdb247c | 2600 | u32 max_xfer_length; |
e3deec09 | 2601 | unsigned char *buffer = kmalloc(vpd_len, GFP_KERNEL); |
d11b6916 | 2602 | |
e3deec09 JB |
2603 | if (!buffer || |
2604 | /* Block Limits VPD */ | |
2605 | scsi_get_vpd_page(sdkp->device, 0xb0, buffer, vpd_len)) | |
2606 | goto out; | |
d11b6916 | 2607 | |
bcdb247c MP |
2608 | max_xfer_length = get_unaligned_be32(&buffer[8]); |
2609 | if (max_xfer_length) | |
2610 | sdkp->max_xfer_blocks = max_xfer_length; | |
2611 | ||
d11b6916 MP |
2612 | blk_queue_io_min(sdkp->disk->queue, |
2613 | get_unaligned_be16(&buffer[6]) * sector_sz); | |
2614 | blk_queue_io_opt(sdkp->disk->queue, | |
2615 | get_unaligned_be32(&buffer[12]) * sector_sz); | |
2616 | ||
c98a0eb0 MP |
2617 | if (buffer[3] == 0x3c) { |
2618 | unsigned int lba_count, desc_count; | |
e339c1a7 | 2619 | |
5db44863 | 2620 | sdkp->max_ws_blocks = (u32)get_unaligned_be64(&buffer[36]); |
e339c1a7 | 2621 | |
c98a0eb0 | 2622 | if (!sdkp->lbpme) |
045d3fe7 | 2623 | goto out; |
045d3fe7 | 2624 | |
c98a0eb0 MP |
2625 | lba_count = get_unaligned_be32(&buffer[20]); |
2626 | desc_count = get_unaligned_be32(&buffer[24]); | |
045d3fe7 | 2627 | |
c98a0eb0 MP |
2628 | if (lba_count && desc_count) |
2629 | sdkp->max_unmap_blocks = lba_count; | |
e339c1a7 | 2630 | |
c98a0eb0 | 2631 | sdkp->unmap_granularity = get_unaligned_be32(&buffer[28]); |
e339c1a7 MP |
2632 | |
2633 | if (buffer[32] & 0x80) | |
c98a0eb0 | 2634 | sdkp->unmap_alignment = |
e339c1a7 | 2635 | get_unaligned_be32(&buffer[32]) & ~(1 << 31); |
c98a0eb0 MP |
2636 | |
2637 | if (!sdkp->lbpvpd) { /* LBP VPD page not provided */ | |
2638 | ||
2639 | if (sdkp->max_unmap_blocks) | |
2640 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
2641 | else | |
2642 | sd_config_discard(sdkp, SD_LBP_WS16); | |
2643 | ||
2644 | } else { /* LBP VPD page tells us what to use */ | |
2645 | ||
2646 | if (sdkp->lbpu && sdkp->max_unmap_blocks) | |
2647 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
2648 | else if (sdkp->lbpws) | |
2649 | sd_config_discard(sdkp, SD_LBP_WS16); | |
2650 | else if (sdkp->lbpws10) | |
2651 | sd_config_discard(sdkp, SD_LBP_WS10); | |
2652 | else | |
2653 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
2654 | } | |
e339c1a7 MP |
2655 | } |
2656 | ||
e3deec09 | 2657 | out: |
d11b6916 MP |
2658 | kfree(buffer); |
2659 | } | |
2660 | ||
3821d768 MP |
2661 | /** |
2662 | * sd_read_block_characteristics - Query block dev. characteristics | |
2663 | * @disk: disk to query | |
2664 | */ | |
2665 | static void sd_read_block_characteristics(struct scsi_disk *sdkp) | |
2666 | { | |
e3deec09 | 2667 | unsigned char *buffer; |
3821d768 | 2668 | u16 rot; |
bb2d3de1 | 2669 | const int vpd_len = 64; |
3821d768 | 2670 | |
e3deec09 | 2671 | buffer = kmalloc(vpd_len, GFP_KERNEL); |
3821d768 | 2672 | |
e3deec09 JB |
2673 | if (!buffer || |
2674 | /* Block Device Characteristics VPD */ | |
2675 | scsi_get_vpd_page(sdkp->device, 0xb1, buffer, vpd_len)) | |
2676 | goto out; | |
3821d768 MP |
2677 | |
2678 | rot = get_unaligned_be16(&buffer[4]); | |
2679 | ||
b277da0a | 2680 | if (rot == 1) { |
3821d768 | 2681 | queue_flag_set_unlocked(QUEUE_FLAG_NONROT, sdkp->disk->queue); |
b277da0a MS |
2682 | queue_flag_clear_unlocked(QUEUE_FLAG_ADD_RANDOM, sdkp->disk->queue); |
2683 | } | |
3821d768 | 2684 | |
e3deec09 | 2685 | out: |
3821d768 MP |
2686 | kfree(buffer); |
2687 | } | |
2688 | ||
045d3fe7 | 2689 | /** |
c98a0eb0 | 2690 | * sd_read_block_provisioning - Query provisioning VPD page |
045d3fe7 MP |
2691 | * @disk: disk to query |
2692 | */ | |
c98a0eb0 | 2693 | static void sd_read_block_provisioning(struct scsi_disk *sdkp) |
045d3fe7 MP |
2694 | { |
2695 | unsigned char *buffer; | |
2696 | const int vpd_len = 8; | |
2697 | ||
c98a0eb0 | 2698 | if (sdkp->lbpme == 0) |
045d3fe7 MP |
2699 | return; |
2700 | ||
2701 | buffer = kmalloc(vpd_len, GFP_KERNEL); | |
2702 | ||
2703 | if (!buffer || scsi_get_vpd_page(sdkp->device, 0xb2, buffer, vpd_len)) | |
2704 | goto out; | |
2705 | ||
c98a0eb0 MP |
2706 | sdkp->lbpvpd = 1; |
2707 | sdkp->lbpu = (buffer[5] >> 7) & 1; /* UNMAP */ | |
2708 | sdkp->lbpws = (buffer[5] >> 6) & 1; /* WRITE SAME(16) with UNMAP */ | |
2709 | sdkp->lbpws10 = (buffer[5] >> 5) & 1; /* WRITE SAME(10) with UNMAP */ | |
045d3fe7 MP |
2710 | |
2711 | out: | |
2712 | kfree(buffer); | |
2713 | } | |
2714 | ||
5db44863 MP |
2715 | static void sd_read_write_same(struct scsi_disk *sdkp, unsigned char *buffer) |
2716 | { | |
66c28f97 MP |
2717 | struct scsi_device *sdev = sdkp->device; |
2718 | ||
54b2b50c MP |
2719 | if (sdev->host->no_write_same) { |
2720 | sdev->no_write_same = 1; | |
2721 | ||
2722 | return; | |
2723 | } | |
2724 | ||
66c28f97 | 2725 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, INQUIRY) < 0) { |
af73623f BS |
2726 | /* too large values might cause issues with arcmsr */ |
2727 | int vpd_buf_len = 64; | |
2728 | ||
66c28f97 MP |
2729 | sdev->no_report_opcodes = 1; |
2730 | ||
2731 | /* Disable WRITE SAME if REPORT SUPPORTED OPERATION | |
2732 | * CODES is unsupported and the device has an ATA | |
2733 | * Information VPD page (SAT). | |
2734 | */ | |
af73623f | 2735 | if (!scsi_get_vpd_page(sdev, 0x89, buffer, vpd_buf_len)) |
66c28f97 MP |
2736 | sdev->no_write_same = 1; |
2737 | } | |
2738 | ||
2739 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME_16) == 1) | |
5db44863 | 2740 | sdkp->ws16 = 1; |
66c28f97 MP |
2741 | |
2742 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME) == 1) | |
2743 | sdkp->ws10 = 1; | |
5db44863 MP |
2744 | } |
2745 | ||
ffd4bc2a MP |
2746 | static int sd_try_extended_inquiry(struct scsi_device *sdp) |
2747 | { | |
c1d40a52 MP |
2748 | /* Attempt VPD inquiry if the device blacklist explicitly calls |
2749 | * for it. | |
2750 | */ | |
2751 | if (sdp->try_vpd_pages) | |
2752 | return 1; | |
ffd4bc2a MP |
2753 | /* |
2754 | * Although VPD inquiries can go to SCSI-2 type devices, | |
2755 | * some USB ones crash on receiving them, and the pages | |
2756 | * we currently ask for are for SPC-3 and beyond | |
2757 | */ | |
09b6b51b | 2758 | if (sdp->scsi_level > SCSI_SPC_2 && !sdp->skip_vpd_pages) |
ffd4bc2a MP |
2759 | return 1; |
2760 | return 0; | |
2761 | } | |
2762 | ||
1da177e4 LT |
2763 | /** |
2764 | * sd_revalidate_disk - called the first time a new disk is seen, | |
2765 | * performs disk spin up, read_capacity, etc. | |
2766 | * @disk: struct gendisk we care about | |
2767 | **/ | |
2768 | static int sd_revalidate_disk(struct gendisk *disk) | |
2769 | { | |
2770 | struct scsi_disk *sdkp = scsi_disk(disk); | |
2771 | struct scsi_device *sdp = sdkp->device; | |
1da177e4 | 2772 | unsigned char *buffer; |
bcdb247c | 2773 | unsigned int max_xfer; |
1da177e4 | 2774 | |
fa0d34be MP |
2775 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, |
2776 | "sd_revalidate_disk\n")); | |
1da177e4 LT |
2777 | |
2778 | /* | |
2779 | * If the device is offline, don't try and read capacity or any | |
2780 | * of the other niceties. | |
2781 | */ | |
2782 | if (!scsi_device_online(sdp)) | |
2783 | goto out; | |
2784 | ||
a6123f14 | 2785 | buffer = kmalloc(SD_BUF_SIZE, GFP_KERNEL); |
1da177e4 | 2786 | if (!buffer) { |
e73aec82 MP |
2787 | sd_printk(KERN_WARNING, sdkp, "sd_revalidate_disk: Memory " |
2788 | "allocation failure.\n"); | |
ea73a9f2 | 2789 | goto out; |
1da177e4 LT |
2790 | } |
2791 | ||
e73aec82 | 2792 | sd_spinup_disk(sdkp); |
1da177e4 LT |
2793 | |
2794 | /* | |
2795 | * Without media there is no reason to ask; moreover, some devices | |
2796 | * react badly if we do. | |
2797 | */ | |
2798 | if (sdkp->media_present) { | |
e73aec82 | 2799 | sd_read_capacity(sdkp, buffer); |
ffd4bc2a MP |
2800 | |
2801 | if (sd_try_extended_inquiry(sdp)) { | |
c98a0eb0 | 2802 | sd_read_block_provisioning(sdkp); |
ffd4bc2a MP |
2803 | sd_read_block_limits(sdkp); |
2804 | sd_read_block_characteristics(sdkp); | |
2805 | } | |
2806 | ||
e73aec82 MP |
2807 | sd_read_write_protect_flag(sdkp, buffer); |
2808 | sd_read_cache_type(sdkp, buffer); | |
e0597d70 | 2809 | sd_read_app_tag_own(sdkp, buffer); |
5db44863 | 2810 | sd_read_write_same(sdkp, buffer); |
1da177e4 | 2811 | } |
461d4e90 | 2812 | |
70a9b873 MP |
2813 | sdkp->first_scan = 0; |
2814 | ||
461d4e90 TH |
2815 | /* |
2816 | * We now have all cache related info, determine how we deal | |
4913efe4 | 2817 | * with flush requests. |
461d4e90 | 2818 | */ |
cb2fb68d | 2819 | sd_set_flush_flag(sdkp); |
461d4e90 | 2820 | |
bcdb247c MP |
2821 | max_xfer = min_not_zero(queue_max_hw_sectors(sdkp->disk->queue), |
2822 | sdkp->max_xfer_blocks); | |
2823 | max_xfer <<= ilog2(sdp->sector_size) - 9; | |
2824 | blk_queue_max_hw_sectors(sdkp->disk->queue, max_xfer); | |
1da177e4 | 2825 | set_capacity(disk, sdkp->capacity); |
5db44863 | 2826 | sd_config_write_same(sdkp); |
1da177e4 LT |
2827 | kfree(buffer); |
2828 | ||
1da177e4 LT |
2829 | out: |
2830 | return 0; | |
2831 | } | |
2832 | ||
72ec24bd TH |
2833 | /** |
2834 | * sd_unlock_native_capacity - unlock native capacity | |
2835 | * @disk: struct gendisk to set capacity for | |
2836 | * | |
2837 | * Block layer calls this function if it detects that partitions | |
2838 | * on @disk reach beyond the end of the device. If the SCSI host | |
2839 | * implements ->unlock_native_capacity() method, it's invoked to | |
2840 | * give it a chance to adjust the device capacity. | |
2841 | * | |
2842 | * CONTEXT: | |
2843 | * Defined by block layer. Might sleep. | |
2844 | */ | |
2845 | static void sd_unlock_native_capacity(struct gendisk *disk) | |
2846 | { | |
2847 | struct scsi_device *sdev = scsi_disk(disk)->device; | |
2848 | ||
2849 | if (sdev->host->hostt->unlock_native_capacity) | |
2850 | sdev->host->hostt->unlock_native_capacity(sdev); | |
2851 | } | |
2852 | ||
3e1a7ff8 TH |
2853 | /** |
2854 | * sd_format_disk_name - format disk name | |
2855 | * @prefix: name prefix - ie. "sd" for SCSI disks | |
2856 | * @index: index of the disk to format name for | |
2857 | * @buf: output buffer | |
2858 | * @buflen: length of the output buffer | |
2859 | * | |
2860 | * SCSI disk names starts at sda. The 26th device is sdz and the | |
2861 | * 27th is sdaa. The last one for two lettered suffix is sdzz | |
2862 | * which is followed by sdaaa. | |
2863 | * | |
2864 | * This is basically 26 base counting with one extra 'nil' entry | |
3ad2f3fb | 2865 | * at the beginning from the second digit on and can be |
3e1a7ff8 TH |
2866 | * determined using similar method as 26 base conversion with the |
2867 | * index shifted -1 after each digit is computed. | |
2868 | * | |
2869 | * CONTEXT: | |
2870 | * Don't care. | |
2871 | * | |
2872 | * RETURNS: | |
2873 | * 0 on success, -errno on failure. | |
2874 | */ | |
2875 | static int sd_format_disk_name(char *prefix, int index, char *buf, int buflen) | |
2876 | { | |
2877 | const int base = 'z' - 'a' + 1; | |
2878 | char *begin = buf + strlen(prefix); | |
2879 | char *end = buf + buflen; | |
2880 | char *p; | |
2881 | int unit; | |
2882 | ||
2883 | p = end - 1; | |
2884 | *p = '\0'; | |
2885 | unit = base; | |
2886 | do { | |
2887 | if (p == begin) | |
2888 | return -EINVAL; | |
2889 | *--p = 'a' + (index % unit); | |
2890 | index = (index / unit) - 1; | |
2891 | } while (index >= 0); | |
2892 | ||
2893 | memmove(begin, p, end - p); | |
2894 | memcpy(buf, prefix, strlen(prefix)); | |
2895 | ||
2896 | return 0; | |
2897 | } | |
2898 | ||
4ace92fc AV |
2899 | /* |
2900 | * The asynchronous part of sd_probe | |
2901 | */ | |
2902 | static void sd_probe_async(void *data, async_cookie_t cookie) | |
2903 | { | |
2904 | struct scsi_disk *sdkp = data; | |
2905 | struct scsi_device *sdp; | |
2906 | struct gendisk *gd; | |
2907 | u32 index; | |
2908 | struct device *dev; | |
2909 | ||
2910 | sdp = sdkp->device; | |
2911 | gd = sdkp->disk; | |
2912 | index = sdkp->index; | |
2913 | dev = &sdp->sdev_gendev; | |
2914 | ||
1a03ae0f MR |
2915 | gd->major = sd_major((index & 0xf0) >> 4); |
2916 | gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00); | |
2917 | gd->minors = SD_MINORS; | |
2918 | ||
4ace92fc AV |
2919 | gd->fops = &sd_fops; |
2920 | gd->private_data = &sdkp->driver; | |
2921 | gd->queue = sdkp->device->request_queue; | |
2922 | ||
70a9b873 MP |
2923 | /* defaults, until the device tells us otherwise */ |
2924 | sdp->sector_size = 512; | |
2925 | sdkp->capacity = 0; | |
2926 | sdkp->media_present = 1; | |
2927 | sdkp->write_prot = 0; | |
39c60a09 | 2928 | sdkp->cache_override = 0; |
70a9b873 MP |
2929 | sdkp->WCE = 0; |
2930 | sdkp->RCD = 0; | |
2931 | sdkp->ATO = 0; | |
2932 | sdkp->first_scan = 1; | |
18a4d0a2 | 2933 | sdkp->max_medium_access_timeouts = SD_MAX_MEDIUM_TIMEOUTS; |
70a9b873 | 2934 | |
4ace92fc AV |
2935 | sd_revalidate_disk(gd); |
2936 | ||
4ace92fc | 2937 | gd->driverfs_dev = &sdp->sdev_gendev; |
97fedbbe | 2938 | gd->flags = GENHD_FL_EXT_DEVT; |
2bae0093 | 2939 | if (sdp->removable) { |
4ace92fc | 2940 | gd->flags |= GENHD_FL_REMOVABLE; |
2bae0093 TH |
2941 | gd->events |= DISK_EVENT_MEDIA_CHANGE; |
2942 | } | |
4ace92fc | 2943 | |
10c580e4 | 2944 | blk_pm_runtime_init(sdp->request_queue, dev); |
4ace92fc | 2945 | add_disk(gd); |
fe542396 MP |
2946 | if (sdkp->capacity) |
2947 | sd_dif_config_host(sdkp); | |
4ace92fc | 2948 | |
3821d768 MP |
2949 | sd_revalidate_disk(gd); |
2950 | ||
4ace92fc AV |
2951 | sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n", |
2952 | sdp->removable ? "removable " : ""); | |
478a8a05 | 2953 | scsi_autopm_put_device(sdp); |
ea038f63 | 2954 | put_device(&sdkp->dev); |
4ace92fc AV |
2955 | } |
2956 | ||
1da177e4 LT |
2957 | /** |
2958 | * sd_probe - called during driver initialization and whenever a | |
2959 | * new scsi device is attached to the system. It is called once | |
2960 | * for each scsi device (not just disks) present. | |
2961 | * @dev: pointer to device object | |
2962 | * | |
2963 | * Returns 0 if successful (or not interested in this scsi device | |
2964 | * (e.g. scanner)); 1 when there is an error. | |
2965 | * | |
2966 | * Note: this function is invoked from the scsi mid-level. | |
2967 | * This function sets up the mapping between a given | |
2968 | * <host,channel,id,lun> (found in sdp) and new device name | |
2969 | * (e.g. /dev/sda). More precisely it is the block device major | |
2970 | * and minor number that is chosen here. | |
2971 | * | |
2db93ce8 PU |
2972 | * Assume sd_probe is not re-entrant (for time being) |
2973 | * Also think about sd_probe() and sd_remove() running coincidentally. | |
1da177e4 LT |
2974 | **/ |
2975 | static int sd_probe(struct device *dev) | |
2976 | { | |
2977 | struct scsi_device *sdp = to_scsi_device(dev); | |
2978 | struct scsi_disk *sdkp; | |
2979 | struct gendisk *gd; | |
439d77f7 | 2980 | int index; |
1da177e4 LT |
2981 | int error; |
2982 | ||
6fe8c1db | 2983 | scsi_autopm_get_device(sdp); |
1da177e4 | 2984 | error = -ENODEV; |
631e8a13 | 2985 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_MOD && sdp->type != TYPE_RBC) |
1da177e4 LT |
2986 | goto out; |
2987 | ||
9ccfc756 | 2988 | SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO, sdp, |
2db93ce8 | 2989 | "sd_probe\n")); |
1da177e4 LT |
2990 | |
2991 | error = -ENOMEM; | |
24669f75 | 2992 | sdkp = kzalloc(sizeof(*sdkp), GFP_KERNEL); |
1da177e4 LT |
2993 | if (!sdkp) |
2994 | goto out; | |
2995 | ||
689d6fac | 2996 | gd = alloc_disk(SD_MINORS); |
1da177e4 LT |
2997 | if (!gd) |
2998 | goto out_free; | |
2999 | ||
f27bac27 TH |
3000 | do { |
3001 | if (!ida_pre_get(&sd_index_ida, GFP_KERNEL)) | |
3002 | goto out_put; | |
1da177e4 | 3003 | |
4034cc68 | 3004 | spin_lock(&sd_index_lock); |
f27bac27 | 3005 | error = ida_get_new(&sd_index_ida, &index); |
4034cc68 | 3006 | spin_unlock(&sd_index_lock); |
f27bac27 | 3007 | } while (error == -EAGAIN); |
1da177e4 | 3008 | |
21208ae5 DK |
3009 | if (error) { |
3010 | sdev_printk(KERN_WARNING, sdp, "sd_probe: memory exhausted.\n"); | |
1da177e4 | 3011 | goto out_put; |
1a03ae0f MR |
3012 | } |
3013 | ||
3e1a7ff8 | 3014 | error = sd_format_disk_name("sd", index, gd->disk_name, DISK_NAME_LEN); |
21208ae5 DK |
3015 | if (error) { |
3016 | sdev_printk(KERN_WARNING, sdp, "SCSI disk (sd) name length exceeded.\n"); | |
f27bac27 | 3017 | goto out_free_index; |
21208ae5 | 3018 | } |
f27bac27 | 3019 | |
1da177e4 LT |
3020 | sdkp->device = sdp; |
3021 | sdkp->driver = &sd_template; | |
3022 | sdkp->disk = gd; | |
3023 | sdkp->index = index; | |
409f3499 | 3024 | atomic_set(&sdkp->openers, 0); |
9e1a1537 | 3025 | atomic_set(&sdkp->device->ioerr_cnt, 0); |
1da177e4 | 3026 | |
601e7638 JB |
3027 | if (!sdp->request_queue->rq_timeout) { |
3028 | if (sdp->type != TYPE_MOD) | |
3029 | blk_queue_rq_timeout(sdp->request_queue, SD_TIMEOUT); | |
3030 | else | |
3031 | blk_queue_rq_timeout(sdp->request_queue, | |
3032 | SD_MOD_TIMEOUT); | |
3033 | } | |
3034 | ||
3035 | device_initialize(&sdkp->dev); | |
478a8a05 | 3036 | sdkp->dev.parent = dev; |
601e7638 | 3037 | sdkp->dev.class = &sd_disk_class; |
02aa2a37 | 3038 | dev_set_name(&sdkp->dev, "%s", dev_name(dev)); |
601e7638 JB |
3039 | |
3040 | if (device_add(&sdkp->dev)) | |
3041 | goto out_free_index; | |
3042 | ||
478a8a05 AS |
3043 | get_device(dev); |
3044 | dev_set_drvdata(dev, sdkp); | |
601e7638 | 3045 | |
ea038f63 | 3046 | get_device(&sdkp->dev); /* prevent release before async_schedule */ |
a7a20d10 | 3047 | async_schedule_domain(sd_probe_async, sdkp, &scsi_sd_probe_domain); |
1da177e4 LT |
3048 | |
3049 | return 0; | |
3050 | ||
f27bac27 | 3051 | out_free_index: |
4034cc68 | 3052 | spin_lock(&sd_index_lock); |
f27bac27 | 3053 | ida_remove(&sd_index_ida, index); |
4034cc68 | 3054 | spin_unlock(&sd_index_lock); |
6bdaa1f1 | 3055 | out_put: |
1da177e4 | 3056 | put_disk(gd); |
6bdaa1f1 | 3057 | out_free: |
1da177e4 | 3058 | kfree(sdkp); |
6bdaa1f1 | 3059 | out: |
6fe8c1db | 3060 | scsi_autopm_put_device(sdp); |
1da177e4 LT |
3061 | return error; |
3062 | } | |
3063 | ||
3064 | /** | |
3065 | * sd_remove - called whenever a scsi disk (previously recognized by | |
3066 | * sd_probe) is detached from the system. It is called (potentially | |
3067 | * multiple times) during sd module unload. | |
3068 | * @sdp: pointer to mid level scsi device object | |
3069 | * | |
3070 | * Note: this function is invoked from the scsi mid-level. | |
3071 | * This function potentially frees up a device name (e.g. /dev/sdc) | |
3072 | * that could be re-used by a subsequent sd_probe(). | |
3073 | * This function is not called when the built-in sd driver is "exit-ed". | |
3074 | **/ | |
3075 | static int sd_remove(struct device *dev) | |
3076 | { | |
601e7638 | 3077 | struct scsi_disk *sdkp; |
0761df9c | 3078 | dev_t devt; |
1da177e4 | 3079 | |
601e7638 | 3080 | sdkp = dev_get_drvdata(dev); |
0761df9c | 3081 | devt = disk_devt(sdkp->disk); |
478a8a05 AS |
3082 | scsi_autopm_get_device(sdkp->device); |
3083 | ||
3c31b52f | 3084 | async_synchronize_full_domain(&scsi_sd_pm_domain); |
a7a20d10 | 3085 | async_synchronize_full_domain(&scsi_sd_probe_domain); |
ee959b00 | 3086 | device_del(&sdkp->dev); |
1da177e4 LT |
3087 | del_gendisk(sdkp->disk); |
3088 | sd_shutdown(dev); | |
39b7f1e2 | 3089 | |
0761df9c HR |
3090 | blk_register_region(devt, SD_MINORS, NULL, |
3091 | sd_default_probe, NULL, NULL); | |
3092 | ||
0b950672 | 3093 | mutex_lock(&sd_ref_mutex); |
39b7f1e2 | 3094 | dev_set_drvdata(dev, NULL); |
ee959b00 | 3095 | put_device(&sdkp->dev); |
0b950672 | 3096 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
3097 | |
3098 | return 0; | |
3099 | } | |
3100 | ||
3101 | /** | |
3102 | * scsi_disk_release - Called to free the scsi_disk structure | |
ee959b00 | 3103 | * @dev: pointer to embedded class device |
1da177e4 | 3104 | * |
0b950672 | 3105 | * sd_ref_mutex must be held entering this routine. Because it is |
1da177e4 LT |
3106 | * called on last put, you should always use the scsi_disk_get() |
3107 | * scsi_disk_put() helpers which manipulate the semaphore directly | |
ee959b00 | 3108 | * and never do a direct put_device. |
1da177e4 | 3109 | **/ |
ee959b00 | 3110 | static void scsi_disk_release(struct device *dev) |
1da177e4 | 3111 | { |
ee959b00 | 3112 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
1da177e4 LT |
3113 | struct gendisk *disk = sdkp->disk; |
3114 | ||
4034cc68 | 3115 | spin_lock(&sd_index_lock); |
f27bac27 | 3116 | ida_remove(&sd_index_ida, sdkp->index); |
4034cc68 | 3117 | spin_unlock(&sd_index_lock); |
1da177e4 LT |
3118 | |
3119 | disk->private_data = NULL; | |
1da177e4 | 3120 | put_disk(disk); |
39b7f1e2 | 3121 | put_device(&sdkp->device->sdev_gendev); |
1da177e4 LT |
3122 | |
3123 | kfree(sdkp); | |
3124 | } | |
3125 | ||
cc5d2c8c | 3126 | static int sd_start_stop_device(struct scsi_disk *sdkp, int start) |
c3c94c5a TH |
3127 | { |
3128 | unsigned char cmd[6] = { START_STOP }; /* START_VALID */ | |
3129 | struct scsi_sense_hdr sshdr; | |
cc5d2c8c | 3130 | struct scsi_device *sdp = sdkp->device; |
c3c94c5a TH |
3131 | int res; |
3132 | ||
3133 | if (start) | |
3134 | cmd[4] |= 1; /* START */ | |
3135 | ||
d2886ea3 SR |
3136 | if (sdp->start_stop_pwr_cond) |
3137 | cmd[4] |= start ? 1 << 4 : 3 << 4; /* Active or Standby */ | |
3138 | ||
c3c94c5a TH |
3139 | if (!scsi_device_online(sdp)) |
3140 | return -ENODEV; | |
3141 | ||
9b21493c LM |
3142 | res = scsi_execute_req_flags(sdp, cmd, DMA_NONE, NULL, 0, &sshdr, |
3143 | SD_TIMEOUT, SD_MAX_RETRIES, NULL, REQ_PM); | |
c3c94c5a | 3144 | if (res) { |
cc5d2c8c JB |
3145 | sd_printk(KERN_WARNING, sdkp, "START_STOP FAILED\n"); |
3146 | sd_print_result(sdkp, res); | |
c3c94c5a | 3147 | if (driver_byte(res) & DRIVER_SENSE) |
cc5d2c8c | 3148 | sd_print_sense_hdr(sdkp, &sshdr); |
95897910 ON |
3149 | if (scsi_sense_valid(&sshdr) && |
3150 | /* 0x3a is medium not present */ | |
3151 | sshdr.asc == 0x3a) | |
3152 | res = 0; | |
c3c94c5a TH |
3153 | } |
3154 | ||
95897910 ON |
3155 | /* SCSI error codes must not go to the generic layer */ |
3156 | if (res) | |
3157 | return -EIO; | |
3158 | ||
3159 | return 0; | |
c3c94c5a TH |
3160 | } |
3161 | ||
1da177e4 LT |
3162 | /* |
3163 | * Send a SYNCHRONIZE CACHE instruction down to the device through | |
3164 | * the normal SCSI command structure. Wait for the command to | |
3165 | * complete. | |
3166 | */ | |
3167 | static void sd_shutdown(struct device *dev) | |
3168 | { | |
39b7f1e2 | 3169 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
1da177e4 LT |
3170 | |
3171 | if (!sdkp) | |
3172 | return; /* this can happen */ | |
3173 | ||
54f57588 LM |
3174 | if (pm_runtime_suspended(dev)) |
3175 | goto exit; | |
3176 | ||
95897910 | 3177 | if (sdkp->WCE && sdkp->media_present) { |
e73aec82 MP |
3178 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
3179 | sd_sync_cache(sdkp); | |
39b7f1e2 | 3180 | } |
c3c94c5a | 3181 | |
cc5d2c8c JB |
3182 | if (system_state != SYSTEM_RESTART && sdkp->device->manage_start_stop) { |
3183 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); | |
3184 | sd_start_stop_device(sdkp, 0); | |
c3c94c5a TH |
3185 | } |
3186 | ||
54f57588 | 3187 | exit: |
39b7f1e2 AS |
3188 | scsi_disk_put(sdkp); |
3189 | } | |
1da177e4 | 3190 | |
95897910 | 3191 | static int sd_suspend_common(struct device *dev, bool ignore_stop_errors) |
c3c94c5a | 3192 | { |
c3c94c5a | 3193 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
09ff92fe | 3194 | int ret = 0; |
c3c94c5a TH |
3195 | |
3196 | if (!sdkp) | |
3197 | return 0; /* this can happen */ | |
3198 | ||
95897910 | 3199 | if (sdkp->WCE && sdkp->media_present) { |
cc5d2c8c | 3200 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
c3c94c5a | 3201 | ret = sd_sync_cache(sdkp); |
95897910 ON |
3202 | if (ret) { |
3203 | /* ignore OFFLINE device */ | |
3204 | if (ret == -ENODEV) | |
3205 | ret = 0; | |
09ff92fe | 3206 | goto done; |
95897910 | 3207 | } |
c3c94c5a TH |
3208 | } |
3209 | ||
691e3d31 | 3210 | if (sdkp->device->manage_start_stop) { |
cc5d2c8c | 3211 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); |
95897910 | 3212 | /* an error is not worth aborting a system sleep */ |
cc5d2c8c | 3213 | ret = sd_start_stop_device(sdkp, 0); |
95897910 ON |
3214 | if (ignore_stop_errors) |
3215 | ret = 0; | |
c3c94c5a TH |
3216 | } |
3217 | ||
09ff92fe AS |
3218 | done: |
3219 | scsi_disk_put(sdkp); | |
3220 | return ret; | |
c3c94c5a TH |
3221 | } |
3222 | ||
95897910 ON |
3223 | static int sd_suspend_system(struct device *dev) |
3224 | { | |
3225 | return sd_suspend_common(dev, true); | |
3226 | } | |
3227 | ||
3228 | static int sd_suspend_runtime(struct device *dev) | |
3229 | { | |
3230 | return sd_suspend_common(dev, false); | |
3231 | } | |
3232 | ||
c3c94c5a TH |
3233 | static int sd_resume(struct device *dev) |
3234 | { | |
c3c94c5a | 3235 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
09ff92fe | 3236 | int ret = 0; |
c3c94c5a | 3237 | |
cc5d2c8c | 3238 | if (!sdkp->device->manage_start_stop) |
09ff92fe | 3239 | goto done; |
c3c94c5a | 3240 | |
cc5d2c8c | 3241 | sd_printk(KERN_NOTICE, sdkp, "Starting disk\n"); |
09ff92fe | 3242 | ret = sd_start_stop_device(sdkp, 1); |
c3c94c5a | 3243 | |
09ff92fe AS |
3244 | done: |
3245 | scsi_disk_put(sdkp); | |
3246 | return ret; | |
c3c94c5a TH |
3247 | } |
3248 | ||
1da177e4 LT |
3249 | /** |
3250 | * init_sd - entry point for this driver (both when built in or when | |
3251 | * a module). | |
3252 | * | |
3253 | * Note: this function registers this driver with the scsi mid-level. | |
3254 | **/ | |
3255 | static int __init init_sd(void) | |
3256 | { | |
5e4009ba | 3257 | int majors = 0, i, err; |
1da177e4 LT |
3258 | |
3259 | SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n")); | |
3260 | ||
0761df9c HR |
3261 | for (i = 0; i < SD_MAJORS; i++) { |
3262 | if (register_blkdev(sd_major(i), "sd") != 0) | |
3263 | continue; | |
3264 | majors++; | |
3265 | blk_register_region(sd_major(i), SD_MINORS, NULL, | |
3266 | sd_default_probe, NULL, NULL); | |
3267 | } | |
1da177e4 LT |
3268 | |
3269 | if (!majors) | |
3270 | return -ENODEV; | |
3271 | ||
5e4009ba JG |
3272 | err = class_register(&sd_disk_class); |
3273 | if (err) | |
3274 | goto err_out; | |
6bdaa1f1 | 3275 | |
4e7392ec MP |
3276 | sd_cdb_cache = kmem_cache_create("sd_ext_cdb", SD_EXT_CDB_SIZE, |
3277 | 0, 0, NULL); | |
3278 | if (!sd_cdb_cache) { | |
3279 | printk(KERN_ERR "sd: can't init extended cdb cache\n"); | |
8d964478 | 3280 | err = -ENOMEM; |
4e7392ec MP |
3281 | goto err_out_class; |
3282 | } | |
3283 | ||
3284 | sd_cdb_pool = mempool_create_slab_pool(SD_MEMPOOL_SIZE, sd_cdb_cache); | |
3285 | if (!sd_cdb_pool) { | |
3286 | printk(KERN_ERR "sd: can't init extended cdb pool\n"); | |
8d964478 | 3287 | err = -ENOMEM; |
4e7392ec MP |
3288 | goto err_out_cache; |
3289 | } | |
3290 | ||
afd5e34b JD |
3291 | err = scsi_register_driver(&sd_template.gendrv); |
3292 | if (err) | |
3293 | goto err_out_driver; | |
3294 | ||
5e4009ba JG |
3295 | return 0; |
3296 | ||
afd5e34b JD |
3297 | err_out_driver: |
3298 | mempool_destroy(sd_cdb_pool); | |
3299 | ||
4e7392ec MP |
3300 | err_out_cache: |
3301 | kmem_cache_destroy(sd_cdb_cache); | |
3302 | ||
5e4009ba JG |
3303 | err_out_class: |
3304 | class_unregister(&sd_disk_class); | |
3305 | err_out: | |
3306 | for (i = 0; i < SD_MAJORS; i++) | |
3307 | unregister_blkdev(sd_major(i), "sd"); | |
3308 | return err; | |
1da177e4 LT |
3309 | } |
3310 | ||
3311 | /** | |
3312 | * exit_sd - exit point for this driver (when it is a module). | |
3313 | * | |
3314 | * Note: this function unregisters this driver from the scsi mid-level. | |
3315 | **/ | |
3316 | static void __exit exit_sd(void) | |
3317 | { | |
3318 | int i; | |
3319 | ||
3320 | SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n")); | |
3321 | ||
afd5e34b | 3322 | scsi_unregister_driver(&sd_template.gendrv); |
4e7392ec MP |
3323 | mempool_destroy(sd_cdb_pool); |
3324 | kmem_cache_destroy(sd_cdb_cache); | |
3325 | ||
5e4009ba JG |
3326 | class_unregister(&sd_disk_class); |
3327 | ||
0761df9c HR |
3328 | for (i = 0; i < SD_MAJORS; i++) { |
3329 | blk_unregister_region(sd_major(i), SD_MINORS); | |
1da177e4 | 3330 | unregister_blkdev(sd_major(i), "sd"); |
0761df9c | 3331 | } |
1da177e4 LT |
3332 | } |
3333 | ||
1da177e4 LT |
3334 | module_init(init_sd); |
3335 | module_exit(exit_sd); | |
e73aec82 MP |
3336 | |
3337 | static void sd_print_sense_hdr(struct scsi_disk *sdkp, | |
3338 | struct scsi_sense_hdr *sshdr) | |
3339 | { | |
2e4c3329 | 3340 | sd_printk(KERN_INFO, sdkp, " "); |
e73aec82 | 3341 | scsi_show_sense_hdr(sshdr); |
2e4c3329 | 3342 | sd_printk(KERN_INFO, sdkp, " "); |
e73aec82 MP |
3343 | scsi_show_extd_sense(sshdr->asc, sshdr->ascq); |
3344 | } | |
3345 | ||
3346 | static void sd_print_result(struct scsi_disk *sdkp, int result) | |
3347 | { | |
2e4c3329 | 3348 | sd_printk(KERN_INFO, sdkp, " "); |
e73aec82 MP |
3349 | scsi_show_result(result); |
3350 | } | |
3351 |