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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 | 118 | static void sd_print_sense_hdr(struct scsi_disk *, struct scsi_sense_hdr *); |
ef61329d | 119 | static void sd_print_result(const struct scsi_disk *, const char *, int); |
7b3d9545 | 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 | 512 | static struct scsi_driver sd_template = { |
1da177e4 LT |
513 | .gendrv = { |
514 | .name = "sd", | |
3af6b352 | 515 | .owner = THIS_MODULE, |
1da177e4 LT |
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 | ||
7985090a | 659 | q->limits.discard_zeroes_data = 0; |
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); | |
7985090a | 683 | q->limits.discard_zeroes_data = sdkp->lbprz; |
c98a0eb0 MP |
684 | break; |
685 | ||
686 | case SD_LBP_WS10: | |
5db44863 MP |
687 | max_blocks = min_not_zero(sdkp->max_ws_blocks, |
688 | (u32)SD_MAX_WS10_BLOCKS); | |
7985090a | 689 | q->limits.discard_zeroes_data = sdkp->lbprz; |
c98a0eb0 MP |
690 | break; |
691 | ||
692 | case SD_LBP_ZERO: | |
5db44863 MP |
693 | max_blocks = min_not_zero(sdkp->max_ws_blocks, |
694 | (u32)SD_MAX_WS10_BLOCKS); | |
c98a0eb0 MP |
695 | q->limits.discard_zeroes_data = 1; |
696 | break; | |
697 | } | |
698 | ||
699 | q->limits.max_discard_sectors = max_blocks * (logical_block_size >> 9); | |
700 | queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, q); | |
c98a0eb0 MP |
701 | } |
702 | ||
e339c1a7 | 703 | /** |
26e85fcd | 704 | * sd_setup_discard_cmnd - unmap blocks on thinly provisioned device |
66ac0280 | 705 | * @sdp: scsi device to operate one |
e339c1a7 MP |
706 | * @rq: Request to prepare |
707 | * | |
708 | * Will issue either UNMAP or WRITE SAME(16) depending on preference | |
709 | * indicated by target device. | |
710 | **/ | |
6a7b4398 | 711 | static int sd_setup_discard_cmnd(struct scsi_cmnd *cmd) |
e339c1a7 | 712 | { |
6a7b4398 CH |
713 | struct request *rq = cmd->request; |
714 | struct scsi_device *sdp = cmd->device; | |
e339c1a7 | 715 | struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); |
26e85fcd MP |
716 | sector_t sector = blk_rq_pos(rq); |
717 | unsigned int nr_sectors = blk_rq_sectors(rq); | |
718 | unsigned int nr_bytes = blk_rq_bytes(rq); | |
66ac0280 | 719 | unsigned int len; |
f1126e95 | 720 | int ret; |
c98a0eb0 | 721 | char *buf; |
66ac0280 | 722 | struct page *page; |
e339c1a7 | 723 | |
26e85fcd MP |
724 | sector >>= ilog2(sdp->sector_size) - 9; |
725 | nr_sectors >>= ilog2(sdp->sector_size) - 9; | |
e339c1a7 | 726 | |
66ac0280 CH |
727 | page = alloc_page(GFP_ATOMIC | __GFP_ZERO); |
728 | if (!page) | |
729 | return BLKPREP_DEFER; | |
730 | ||
c98a0eb0 MP |
731 | switch (sdkp->provisioning_mode) { |
732 | case SD_LBP_UNMAP: | |
733 | buf = page_address(page); | |
e339c1a7 | 734 | |
6a7b4398 CH |
735 | cmd->cmd_len = 10; |
736 | cmd->cmnd[0] = UNMAP; | |
737 | cmd->cmnd[8] = 24; | |
e339c1a7 MP |
738 | |
739 | put_unaligned_be16(6 + 16, &buf[0]); | |
740 | put_unaligned_be16(16, &buf[2]); | |
741 | put_unaligned_be64(sector, &buf[8]); | |
66ac0280 | 742 | put_unaligned_be32(nr_sectors, &buf[16]); |
e339c1a7 | 743 | |
66ac0280 | 744 | len = 24; |
c98a0eb0 MP |
745 | break; |
746 | ||
747 | case SD_LBP_WS16: | |
6a7b4398 CH |
748 | cmd->cmd_len = 16; |
749 | cmd->cmnd[0] = WRITE_SAME_16; | |
750 | cmd->cmnd[1] = 0x8; /* UNMAP */ | |
751 | put_unaligned_be64(sector, &cmd->cmnd[2]); | |
752 | put_unaligned_be32(nr_sectors, &cmd->cmnd[10]); | |
66ac0280 CH |
753 | |
754 | len = sdkp->device->sector_size; | |
c98a0eb0 MP |
755 | break; |
756 | ||
757 | case SD_LBP_WS10: | |
758 | case SD_LBP_ZERO: | |
6a7b4398 CH |
759 | cmd->cmd_len = 10; |
760 | cmd->cmnd[0] = WRITE_SAME; | |
c98a0eb0 | 761 | if (sdkp->provisioning_mode == SD_LBP_WS10) |
6a7b4398 CH |
762 | cmd->cmnd[1] = 0x8; /* UNMAP */ |
763 | put_unaligned_be32(sector, &cmd->cmnd[2]); | |
764 | put_unaligned_be16(nr_sectors, &cmd->cmnd[7]); | |
c98a0eb0 MP |
765 | |
766 | len = sdkp->device->sector_size; | |
767 | break; | |
768 | ||
769 | default: | |
09b9cc44 | 770 | ret = BLKPREP_KILL; |
c98a0eb0 | 771 | goto out; |
e339c1a7 MP |
772 | } |
773 | ||
dc4a9307 | 774 | rq->completion_data = page; |
6a7b4398 CH |
775 | rq->timeout = SD_TIMEOUT; |
776 | ||
777 | cmd->transfersize = len; | |
e4200f8e | 778 | cmd->allowed = SD_MAX_RETRIES; |
6a7b4398 CH |
779 | |
780 | /* | |
781 | * Initially __data_len is set to the amount of data that needs to be | |
782 | * transferred to the target. This amount depends on whether WRITE SAME | |
783 | * or UNMAP is being used. After the scatterlist has been mapped by | |
784 | * scsi_init_io() we set __data_len to the size of the area to be | |
785 | * discarded on disk. This allows us to report completion on the full | |
786 | * amount of blocks described by the request. | |
787 | */ | |
66ac0280 | 788 | blk_add_request_payload(rq, page, len); |
3c356bde | 789 | ret = scsi_init_io(cmd); |
26e85fcd | 790 | rq->__data_len = nr_bytes; |
c98a0eb0 MP |
791 | |
792 | out: | |
b4f42e28 | 793 | if (ret != BLKPREP_OK) |
610a6349 | 794 | __free_page(page); |
f1126e95 FT |
795 | return ret; |
796 | } | |
797 | ||
5db44863 MP |
798 | static void sd_config_write_same(struct scsi_disk *sdkp) |
799 | { | |
800 | struct request_queue *q = sdkp->disk->queue; | |
801 | unsigned int logical_block_size = sdkp->device->sector_size; | |
5db44863 MP |
802 | |
803 | if (sdkp->device->no_write_same) { | |
804 | sdkp->max_ws_blocks = 0; | |
805 | goto out; | |
806 | } | |
807 | ||
808 | /* Some devices can not handle block counts above 0xffff despite | |
809 | * supporting WRITE SAME(16). Consequently we default to 64k | |
810 | * blocks per I/O unless the device explicitly advertises a | |
811 | * bigger limit. | |
812 | */ | |
66c28f97 MP |
813 | if (sdkp->max_ws_blocks > SD_MAX_WS10_BLOCKS) |
814 | sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks, | |
815 | (u32)SD_MAX_WS16_BLOCKS); | |
816 | else if (sdkp->ws16 || sdkp->ws10 || sdkp->device->no_report_opcodes) | |
817 | sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks, | |
818 | (u32)SD_MAX_WS10_BLOCKS); | |
819 | else { | |
820 | sdkp->device->no_write_same = 1; | |
821 | sdkp->max_ws_blocks = 0; | |
822 | } | |
5db44863 MP |
823 | |
824 | out: | |
66c28f97 MP |
825 | blk_queue_max_write_same_sectors(q, sdkp->max_ws_blocks * |
826 | (logical_block_size >> 9)); | |
5db44863 MP |
827 | } |
828 | ||
829 | /** | |
830 | * sd_setup_write_same_cmnd - write the same data to multiple blocks | |
59b1134c | 831 | * @cmd: command to prepare |
5db44863 MP |
832 | * |
833 | * Will issue either WRITE SAME(10) or WRITE SAME(16) depending on | |
834 | * preference indicated by target device. | |
835 | **/ | |
59b1134c | 836 | static int sd_setup_write_same_cmnd(struct scsi_cmnd *cmd) |
5db44863 | 837 | { |
59b1134c CH |
838 | struct request *rq = cmd->request; |
839 | struct scsi_device *sdp = cmd->device; | |
5db44863 MP |
840 | struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); |
841 | struct bio *bio = rq->bio; | |
842 | sector_t sector = blk_rq_pos(rq); | |
843 | unsigned int nr_sectors = blk_rq_sectors(rq); | |
844 | unsigned int nr_bytes = blk_rq_bytes(rq); | |
845 | int ret; | |
846 | ||
847 | if (sdkp->device->no_write_same) | |
848 | return BLKPREP_KILL; | |
849 | ||
a4ad39b1 | 850 | BUG_ON(bio_offset(bio) || bio_iovec(bio).bv_len != sdp->sector_size); |
5db44863 MP |
851 | |
852 | sector >>= ilog2(sdp->sector_size) - 9; | |
853 | nr_sectors >>= ilog2(sdp->sector_size) - 9; | |
854 | ||
5db44863 | 855 | rq->timeout = SD_WRITE_SAME_TIMEOUT; |
5db44863 MP |
856 | |
857 | if (sdkp->ws16 || sector > 0xffffffff || nr_sectors > 0xffff) { | |
59b1134c CH |
858 | cmd->cmd_len = 16; |
859 | cmd->cmnd[0] = WRITE_SAME_16; | |
860 | put_unaligned_be64(sector, &cmd->cmnd[2]); | |
861 | put_unaligned_be32(nr_sectors, &cmd->cmnd[10]); | |
5db44863 | 862 | } else { |
59b1134c CH |
863 | cmd->cmd_len = 10; |
864 | cmd->cmnd[0] = WRITE_SAME; | |
865 | put_unaligned_be32(sector, &cmd->cmnd[2]); | |
866 | put_unaligned_be16(nr_sectors, &cmd->cmnd[7]); | |
5db44863 MP |
867 | } |
868 | ||
59b1134c | 869 | cmd->transfersize = sdp->sector_size; |
a25ee548 | 870 | cmd->allowed = SD_MAX_RETRIES; |
5db44863 | 871 | |
59b1134c CH |
872 | /* |
873 | * For WRITE_SAME the data transferred in the DATA IN buffer is | |
874 | * different from the amount of data actually written to the target. | |
875 | * | |
876 | * We set up __data_len to the amount of data transferred from the | |
877 | * DATA IN buffer so that blk_rq_map_sg set up the proper S/G list | |
878 | * to transfer a single sector of data first, but then reset it to | |
879 | * the amount of data to be written right after so that the I/O path | |
880 | * knows how much to actually write. | |
881 | */ | |
882 | rq->__data_len = sdp->sector_size; | |
3c356bde | 883 | ret = scsi_init_io(cmd); |
59b1134c | 884 | rq->__data_len = nr_bytes; |
5db44863 MP |
885 | return ret; |
886 | } | |
887 | ||
a118c6c1 | 888 | static int sd_setup_flush_cmnd(struct scsi_cmnd *cmd) |
90467c29 | 889 | { |
a118c6c1 CH |
890 | struct request *rq = cmd->request; |
891 | ||
892 | /* flush requests don't perform I/O, zero the S/G table */ | |
893 | memset(&cmd->sdb, 0, sizeof(cmd->sdb)); | |
90467c29 | 894 | |
a118c6c1 CH |
895 | cmd->cmnd[0] = SYNCHRONIZE_CACHE; |
896 | cmd->cmd_len = 10; | |
897 | cmd->transfersize = 0; | |
898 | cmd->allowed = SD_MAX_RETRIES; | |
899 | ||
26b9fd8b | 900 | rq->timeout = rq->q->rq_timeout * SD_FLUSH_TIMEOUT_MULTIPLIER; |
a118c6c1 | 901 | return BLKPREP_OK; |
90467c29 FT |
902 | } |
903 | ||
87949eee | 904 | static int sd_setup_read_write_cmnd(struct scsi_cmnd *SCpnt) |
1da177e4 | 905 | { |
a1b73fc1 CH |
906 | struct request *rq = SCpnt->request; |
907 | struct scsi_device *sdp = SCpnt->device; | |
776b23a0 | 908 | struct gendisk *disk = rq->rq_disk; |
af55ff67 | 909 | struct scsi_disk *sdkp; |
83096ebf | 910 | sector_t block = blk_rq_pos(rq); |
18351070 | 911 | sector_t threshold; |
83096ebf | 912 | unsigned int this_count = blk_rq_sectors(rq); |
c611529e MP |
913 | unsigned int dif, dix; |
914 | int ret; | |
4e7392ec | 915 | unsigned char protect; |
7f9a6bc4 | 916 | |
3c356bde | 917 | ret = scsi_init_io(SCpnt); |
7f9a6bc4 JB |
918 | if (ret != BLKPREP_OK) |
919 | goto out; | |
920 | SCpnt = rq->special; | |
af55ff67 | 921 | sdkp = scsi_disk(disk); |
7f9a6bc4 JB |
922 | |
923 | /* from here on until we're complete, any goto out | |
924 | * is used for a killable error condition */ | |
925 | ret = BLKPREP_KILL; | |
1da177e4 | 926 | |
a1b73fc1 CH |
927 | SCSI_LOG_HLQUEUE(1, |
928 | scmd_printk(KERN_INFO, SCpnt, | |
929 | "%s: block=%llu, count=%d\n", | |
930 | __func__, (unsigned long long)block, this_count)); | |
1da177e4 LT |
931 | |
932 | if (!sdp || !scsi_device_online(sdp) || | |
83096ebf | 933 | block + blk_rq_sectors(rq) > get_capacity(disk)) { |
fa0d34be | 934 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
83096ebf TH |
935 | "Finishing %u sectors\n", |
936 | blk_rq_sectors(rq))); | |
fa0d34be MP |
937 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
938 | "Retry with 0x%p\n", SCpnt)); | |
7f9a6bc4 | 939 | goto out; |
1da177e4 LT |
940 | } |
941 | ||
942 | if (sdp->changed) { | |
943 | /* | |
944 | * quietly refuse to do anything to a changed disc until | |
945 | * the changed bit has been reset | |
946 | */ | |
3ff5588d | 947 | /* printk("SCSI disk has been changed or is not present. Prohibiting further I/O.\n"); */ |
7f9a6bc4 | 948 | goto out; |
1da177e4 | 949 | } |
7f9a6bc4 | 950 | |
a0899d4d | 951 | /* |
18351070 LT |
952 | * Some SD card readers can't handle multi-sector accesses which touch |
953 | * the last one or two hardware sectors. Split accesses as needed. | |
a0899d4d | 954 | */ |
18351070 LT |
955 | threshold = get_capacity(disk) - SD_LAST_BUGGY_SECTORS * |
956 | (sdp->sector_size / 512); | |
957 | ||
958 | if (unlikely(sdp->last_sector_bug && block + this_count > threshold)) { | |
959 | if (block < threshold) { | |
960 | /* Access up to the threshold but not beyond */ | |
961 | this_count = threshold - block; | |
962 | } else { | |
963 | /* Access only a single hardware sector */ | |
964 | this_count = sdp->sector_size / 512; | |
965 | } | |
966 | } | |
a0899d4d | 967 | |
fa0d34be MP |
968 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, "block=%llu\n", |
969 | (unsigned long long)block)); | |
1da177e4 LT |
970 | |
971 | /* | |
972 | * If we have a 1K hardware sectorsize, prevent access to single | |
973 | * 512 byte sectors. In theory we could handle this - in fact | |
974 | * the scsi cdrom driver must be able to handle this because | |
975 | * we typically use 1K blocksizes, and cdroms typically have | |
976 | * 2K hardware sectorsizes. Of course, things are simpler | |
977 | * with the cdrom, since it is read-only. For performance | |
978 | * reasons, the filesystems should be able to handle this | |
979 | * and not force the scsi disk driver to use bounce buffers | |
980 | * for this. | |
981 | */ | |
982 | if (sdp->sector_size == 1024) { | |
83096ebf | 983 | if ((block & 1) || (blk_rq_sectors(rq) & 1)) { |
e73aec82 MP |
984 | scmd_printk(KERN_ERR, SCpnt, |
985 | "Bad block number requested\n"); | |
7f9a6bc4 | 986 | goto out; |
1da177e4 LT |
987 | } else { |
988 | block = block >> 1; | |
989 | this_count = this_count >> 1; | |
990 | } | |
991 | } | |
992 | if (sdp->sector_size == 2048) { | |
83096ebf | 993 | if ((block & 3) || (blk_rq_sectors(rq) & 3)) { |
e73aec82 MP |
994 | scmd_printk(KERN_ERR, SCpnt, |
995 | "Bad block number requested\n"); | |
7f9a6bc4 | 996 | goto out; |
1da177e4 LT |
997 | } else { |
998 | block = block >> 2; | |
999 | this_count = this_count >> 2; | |
1000 | } | |
1001 | } | |
1002 | if (sdp->sector_size == 4096) { | |
83096ebf | 1003 | if ((block & 7) || (blk_rq_sectors(rq) & 7)) { |
e73aec82 MP |
1004 | scmd_printk(KERN_ERR, SCpnt, |
1005 | "Bad block number requested\n"); | |
7f9a6bc4 | 1006 | goto out; |
1da177e4 LT |
1007 | } else { |
1008 | block = block >> 3; | |
1009 | this_count = this_count >> 3; | |
1010 | } | |
1011 | } | |
1012 | if (rq_data_dir(rq) == WRITE) { | |
1da177e4 | 1013 | SCpnt->cmnd[0] = WRITE_6; |
af55ff67 | 1014 | |
8c579ab6 | 1015 | if (blk_integrity_rq(rq)) |
c611529e | 1016 | sd_dif_prepare(SCpnt); |
af55ff67 | 1017 | |
1da177e4 LT |
1018 | } else if (rq_data_dir(rq) == READ) { |
1019 | SCpnt->cmnd[0] = READ_6; | |
1da177e4 | 1020 | } else { |
5953316d | 1021 | scmd_printk(KERN_ERR, SCpnt, "Unknown command %llx\n", (unsigned long long) rq->cmd_flags); |
7f9a6bc4 | 1022 | goto out; |
1da177e4 LT |
1023 | } |
1024 | ||
fa0d34be | 1025 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
83096ebf | 1026 | "%s %d/%u 512 byte blocks.\n", |
fa0d34be MP |
1027 | (rq_data_dir(rq) == WRITE) ? |
1028 | "writing" : "reading", this_count, | |
83096ebf | 1029 | blk_rq_sectors(rq))); |
1da177e4 | 1030 | |
c611529e MP |
1031 | dix = scsi_prot_sg_count(SCpnt); |
1032 | dif = scsi_host_dif_capable(SCpnt->device->host, sdkp->protection_type); | |
1033 | ||
1034 | if (dif || dix) | |
1035 | protect = sd_setup_protect_cmnd(SCpnt, dix, dif); | |
af55ff67 | 1036 | else |
4e7392ec MP |
1037 | protect = 0; |
1038 | ||
c611529e | 1039 | if (protect && sdkp->protection_type == SD_DIF_TYPE2_PROTECTION) { |
4e7392ec MP |
1040 | SCpnt->cmnd = mempool_alloc(sd_cdb_pool, GFP_ATOMIC); |
1041 | ||
1042 | if (unlikely(SCpnt->cmnd == NULL)) { | |
1043 | ret = BLKPREP_DEFER; | |
1044 | goto out; | |
1045 | } | |
af55ff67 | 1046 | |
4e7392ec MP |
1047 | SCpnt->cmd_len = SD_EXT_CDB_SIZE; |
1048 | memset(SCpnt->cmnd, 0, SCpnt->cmd_len); | |
1049 | SCpnt->cmnd[0] = VARIABLE_LENGTH_CMD; | |
1050 | SCpnt->cmnd[7] = 0x18; | |
1051 | SCpnt->cmnd[9] = (rq_data_dir(rq) == READ) ? READ_32 : WRITE_32; | |
33659ebb | 1052 | SCpnt->cmnd[10] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
4e7392ec MP |
1053 | |
1054 | /* LBA */ | |
1055 | SCpnt->cmnd[12] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0; | |
1056 | SCpnt->cmnd[13] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0; | |
1057 | SCpnt->cmnd[14] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0; | |
1058 | SCpnt->cmnd[15] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0; | |
1059 | SCpnt->cmnd[16] = (unsigned char) (block >> 24) & 0xff; | |
1060 | SCpnt->cmnd[17] = (unsigned char) (block >> 16) & 0xff; | |
1061 | SCpnt->cmnd[18] = (unsigned char) (block >> 8) & 0xff; | |
1062 | SCpnt->cmnd[19] = (unsigned char) block & 0xff; | |
1063 | ||
1064 | /* Expected Indirect LBA */ | |
1065 | SCpnt->cmnd[20] = (unsigned char) (block >> 24) & 0xff; | |
1066 | SCpnt->cmnd[21] = (unsigned char) (block >> 16) & 0xff; | |
1067 | SCpnt->cmnd[22] = (unsigned char) (block >> 8) & 0xff; | |
1068 | SCpnt->cmnd[23] = (unsigned char) block & 0xff; | |
1069 | ||
1070 | /* Transfer length */ | |
1071 | SCpnt->cmnd[28] = (unsigned char) (this_count >> 24) & 0xff; | |
1072 | SCpnt->cmnd[29] = (unsigned char) (this_count >> 16) & 0xff; | |
1073 | SCpnt->cmnd[30] = (unsigned char) (this_count >> 8) & 0xff; | |
1074 | SCpnt->cmnd[31] = (unsigned char) this_count & 0xff; | |
e430cbc8 | 1075 | } else if (sdp->use_16_for_rw || (this_count > 0xffff)) { |
1da177e4 | 1076 | SCpnt->cmnd[0] += READ_16 - READ_6; |
33659ebb | 1077 | SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
1da177e4 LT |
1078 | SCpnt->cmnd[2] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0; |
1079 | SCpnt->cmnd[3] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0; | |
1080 | SCpnt->cmnd[4] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0; | |
1081 | SCpnt->cmnd[5] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0; | |
1082 | SCpnt->cmnd[6] = (unsigned char) (block >> 24) & 0xff; | |
1083 | SCpnt->cmnd[7] = (unsigned char) (block >> 16) & 0xff; | |
1084 | SCpnt->cmnd[8] = (unsigned char) (block >> 8) & 0xff; | |
1085 | SCpnt->cmnd[9] = (unsigned char) block & 0xff; | |
1086 | SCpnt->cmnd[10] = (unsigned char) (this_count >> 24) & 0xff; | |
1087 | SCpnt->cmnd[11] = (unsigned char) (this_count >> 16) & 0xff; | |
1088 | SCpnt->cmnd[12] = (unsigned char) (this_count >> 8) & 0xff; | |
1089 | SCpnt->cmnd[13] = (unsigned char) this_count & 0xff; | |
1090 | SCpnt->cmnd[14] = SCpnt->cmnd[15] = 0; | |
1091 | } else if ((this_count > 0xff) || (block > 0x1fffff) || | |
af55ff67 | 1092 | scsi_device_protection(SCpnt->device) || |
1da177e4 | 1093 | SCpnt->device->use_10_for_rw) { |
1da177e4 | 1094 | SCpnt->cmnd[0] += READ_10 - READ_6; |
33659ebb | 1095 | SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
1da177e4 LT |
1096 | SCpnt->cmnd[2] = (unsigned char) (block >> 24) & 0xff; |
1097 | SCpnt->cmnd[3] = (unsigned char) (block >> 16) & 0xff; | |
1098 | SCpnt->cmnd[4] = (unsigned char) (block >> 8) & 0xff; | |
1099 | SCpnt->cmnd[5] = (unsigned char) block & 0xff; | |
1100 | SCpnt->cmnd[6] = SCpnt->cmnd[9] = 0; | |
1101 | SCpnt->cmnd[7] = (unsigned char) (this_count >> 8) & 0xff; | |
1102 | SCpnt->cmnd[8] = (unsigned char) this_count & 0xff; | |
1103 | } else { | |
33659ebb | 1104 | if (unlikely(rq->cmd_flags & REQ_FUA)) { |
007365ad TH |
1105 | /* |
1106 | * This happens only if this drive failed | |
1107 | * 10byte rw command with ILLEGAL_REQUEST | |
1108 | * during operation and thus turned off | |
1109 | * use_10_for_rw. | |
1110 | */ | |
e73aec82 MP |
1111 | scmd_printk(KERN_ERR, SCpnt, |
1112 | "FUA write on READ/WRITE(6) drive\n"); | |
7f9a6bc4 | 1113 | goto out; |
007365ad TH |
1114 | } |
1115 | ||
1da177e4 LT |
1116 | SCpnt->cmnd[1] |= (unsigned char) ((block >> 16) & 0x1f); |
1117 | SCpnt->cmnd[2] = (unsigned char) ((block >> 8) & 0xff); | |
1118 | SCpnt->cmnd[3] = (unsigned char) block & 0xff; | |
1119 | SCpnt->cmnd[4] = (unsigned char) this_count; | |
1120 | SCpnt->cmnd[5] = 0; | |
1121 | } | |
30b0c37b | 1122 | SCpnt->sdb.length = this_count * sdp->sector_size; |
1da177e4 LT |
1123 | |
1124 | /* | |
1125 | * We shouldn't disconnect in the middle of a sector, so with a dumb | |
1126 | * host adapter, it's safe to assume that we can at least transfer | |
1127 | * this many bytes between each connect / disconnect. | |
1128 | */ | |
1129 | SCpnt->transfersize = sdp->sector_size; | |
1130 | SCpnt->underflow = this_count << 9; | |
1131 | SCpnt->allowed = SD_MAX_RETRIES; | |
1da177e4 | 1132 | |
1da177e4 LT |
1133 | /* |
1134 | * This indicates that the command is ready from our end to be | |
1135 | * queued. | |
1136 | */ | |
7f9a6bc4 JB |
1137 | ret = BLKPREP_OK; |
1138 | out: | |
a1b73fc1 | 1139 | return ret; |
1da177e4 LT |
1140 | } |
1141 | ||
87949eee CH |
1142 | static int sd_init_command(struct scsi_cmnd *cmd) |
1143 | { | |
1144 | struct request *rq = cmd->request; | |
1145 | ||
1146 | if (rq->cmd_flags & REQ_DISCARD) | |
1147 | return sd_setup_discard_cmnd(cmd); | |
1148 | else if (rq->cmd_flags & REQ_WRITE_SAME) | |
1149 | return sd_setup_write_same_cmnd(cmd); | |
1150 | else if (rq->cmd_flags & REQ_FLUSH) | |
1151 | return sd_setup_flush_cmnd(cmd); | |
1152 | else | |
1153 | return sd_setup_read_write_cmnd(cmd); | |
1154 | } | |
1155 | ||
1156 | static void sd_uninit_command(struct scsi_cmnd *SCpnt) | |
1157 | { | |
1158 | struct request *rq = SCpnt->request; | |
1159 | ||
1160 | if (rq->cmd_flags & REQ_DISCARD) | |
1161 | __free_page(rq->completion_data); | |
1162 | ||
1163 | if (SCpnt->cmnd != rq->cmd) { | |
1164 | mempool_free(SCpnt->cmnd, sd_cdb_pool); | |
1165 | SCpnt->cmnd = NULL; | |
1166 | SCpnt->cmd_len = 0; | |
1167 | } | |
1168 | } | |
1169 | ||
1da177e4 LT |
1170 | /** |
1171 | * sd_open - open a scsi disk device | |
1172 | * @inode: only i_rdev member may be used | |
1173 | * @filp: only f_mode and f_flags may be used | |
1174 | * | |
1175 | * Returns 0 if successful. Returns a negated errno value in case | |
1176 | * of error. | |
1177 | * | |
1178 | * Note: This can be called from a user context (e.g. fsck(1) ) | |
1179 | * or from within the kernel (e.g. as a result of a mount(1) ). | |
1180 | * In the latter case @inode and @filp carry an abridged amount | |
1181 | * of information as noted above. | |
409f3499 AB |
1182 | * |
1183 | * Locking: called with bdev->bd_mutex held. | |
1da177e4 | 1184 | **/ |
0338e291 | 1185 | static int sd_open(struct block_device *bdev, fmode_t mode) |
1da177e4 | 1186 | { |
0338e291 | 1187 | struct scsi_disk *sdkp = scsi_disk_get(bdev->bd_disk); |
1da177e4 LT |
1188 | struct scsi_device *sdev; |
1189 | int retval; | |
1190 | ||
0338e291 | 1191 | if (!sdkp) |
1da177e4 LT |
1192 | return -ENXIO; |
1193 | ||
fa0d34be | 1194 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_open\n")); |
1da177e4 LT |
1195 | |
1196 | sdev = sdkp->device; | |
1197 | ||
1198 | /* | |
1199 | * If the device is in error recovery, wait until it is done. | |
1200 | * If the device is offline, then disallow any access to it. | |
1201 | */ | |
1202 | retval = -ENXIO; | |
1203 | if (!scsi_block_when_processing_errors(sdev)) | |
1204 | goto error_out; | |
1205 | ||
1206 | if (sdev->removable || sdkp->write_prot) | |
0338e291 | 1207 | check_disk_change(bdev); |
1da177e4 LT |
1208 | |
1209 | /* | |
1210 | * If the drive is empty, just let the open fail. | |
1211 | */ | |
1212 | retval = -ENOMEDIUM; | |
0338e291 | 1213 | if (sdev->removable && !sdkp->media_present && !(mode & FMODE_NDELAY)) |
1da177e4 LT |
1214 | goto error_out; |
1215 | ||
1216 | /* | |
1217 | * If the device has the write protect tab set, have the open fail | |
1218 | * if the user expects to be able to write to the thing. | |
1219 | */ | |
1220 | retval = -EROFS; | |
0338e291 | 1221 | if (sdkp->write_prot && (mode & FMODE_WRITE)) |
1da177e4 LT |
1222 | goto error_out; |
1223 | ||
1224 | /* | |
1225 | * It is possible that the disk changing stuff resulted in | |
1226 | * the device being taken offline. If this is the case, | |
1227 | * report this to the user, and don't pretend that the | |
1228 | * open actually succeeded. | |
1229 | */ | |
1230 | retval = -ENXIO; | |
1231 | if (!scsi_device_online(sdev)) | |
1232 | goto error_out; | |
1233 | ||
409f3499 | 1234 | if ((atomic_inc_return(&sdkp->openers) == 1) && sdev->removable) { |
1da177e4 LT |
1235 | if (scsi_block_when_processing_errors(sdev)) |
1236 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT); | |
1237 | } | |
1238 | ||
1239 | return 0; | |
1240 | ||
1241 | error_out: | |
1242 | scsi_disk_put(sdkp); | |
1243 | return retval; | |
1244 | } | |
1245 | ||
1246 | /** | |
1247 | * sd_release - invoked when the (last) close(2) is called on this | |
1248 | * scsi disk. | |
1249 | * @inode: only i_rdev member may be used | |
1250 | * @filp: only f_mode and f_flags may be used | |
1251 | * | |
1252 | * Returns 0. | |
1253 | * | |
1254 | * Note: may block (uninterruptible) if error recovery is underway | |
1255 | * on this disk. | |
409f3499 AB |
1256 | * |
1257 | * Locking: called with bdev->bd_mutex held. | |
1da177e4 | 1258 | **/ |
db2a144b | 1259 | static void sd_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 1260 | { |
1da177e4 LT |
1261 | struct scsi_disk *sdkp = scsi_disk(disk); |
1262 | struct scsi_device *sdev = sdkp->device; | |
1263 | ||
56937f7b | 1264 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_release\n")); |
1da177e4 | 1265 | |
7e443312 | 1266 | if (atomic_dec_return(&sdkp->openers) == 0 && sdev->removable) { |
1da177e4 LT |
1267 | if (scsi_block_when_processing_errors(sdev)) |
1268 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW); | |
1269 | } | |
1270 | ||
1271 | /* | |
1272 | * XXX and what if there are packets in flight and this close() | |
1273 | * XXX is followed by a "rmmod sd_mod"? | |
1274 | */ | |
478a8a05 | 1275 | |
1da177e4 | 1276 | scsi_disk_put(sdkp); |
1da177e4 LT |
1277 | } |
1278 | ||
a885c8c4 | 1279 | static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
1da177e4 LT |
1280 | { |
1281 | struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk); | |
1282 | struct scsi_device *sdp = sdkp->device; | |
1283 | struct Scsi_Host *host = sdp->host; | |
1284 | int diskinfo[4]; | |
1285 | ||
1286 | /* default to most commonly used values */ | |
1287 | diskinfo[0] = 0x40; /* 1 << 6 */ | |
1288 | diskinfo[1] = 0x20; /* 1 << 5 */ | |
1289 | diskinfo[2] = sdkp->capacity >> 11; | |
1290 | ||
1291 | /* override with calculated, extended default, or driver values */ | |
1292 | if (host->hostt->bios_param) | |
1293 | host->hostt->bios_param(sdp, bdev, sdkp->capacity, diskinfo); | |
1294 | else | |
1295 | scsicam_bios_param(bdev, sdkp->capacity, diskinfo); | |
1296 | ||
a885c8c4 CH |
1297 | geo->heads = diskinfo[0]; |
1298 | geo->sectors = diskinfo[1]; | |
1299 | geo->cylinders = diskinfo[2]; | |
1da177e4 LT |
1300 | return 0; |
1301 | } | |
1302 | ||
1303 | /** | |
1304 | * sd_ioctl - process an ioctl | |
1305 | * @inode: only i_rdev/i_bdev members may be used | |
1306 | * @filp: only f_mode and f_flags may be used | |
1307 | * @cmd: ioctl command number | |
1308 | * @arg: this is third argument given to ioctl(2) system call. | |
1309 | * Often contains a pointer. | |
1310 | * | |
25985edc | 1311 | * Returns 0 if successful (some ioctls return positive numbers on |
1da177e4 LT |
1312 | * success as well). Returns a negated errno value in case of error. |
1313 | * | |
1314 | * Note: most ioctls are forward onto the block subsystem or further | |
3a4fa0a2 | 1315 | * down in the scsi subsystem. |
1da177e4 | 1316 | **/ |
0338e291 | 1317 | static int sd_ioctl(struct block_device *bdev, fmode_t mode, |
1da177e4 LT |
1318 | unsigned int cmd, unsigned long arg) |
1319 | { | |
1da177e4 | 1320 | struct gendisk *disk = bdev->bd_disk; |
fe2d1851 NN |
1321 | struct scsi_disk *sdkp = scsi_disk(disk); |
1322 | struct scsi_device *sdp = sdkp->device; | |
1da177e4 LT |
1323 | void __user *p = (void __user *)arg; |
1324 | int error; | |
1325 | ||
fe2d1851 NN |
1326 | SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO, sdkp, "sd_ioctl: disk=%s, " |
1327 | "cmd=0x%x\n", disk->disk_name, cmd)); | |
1da177e4 | 1328 | |
0bfc96cb PB |
1329 | error = scsi_verify_blk_ioctl(bdev, cmd); |
1330 | if (error < 0) | |
1331 | return error; | |
1332 | ||
1da177e4 LT |
1333 | /* |
1334 | * If we are in the middle of error recovery, don't let anyone | |
1335 | * else try and use this device. Also, if error recovery fails, it | |
1336 | * may try and take the device offline, in which case all further | |
1337 | * access to the device is prohibited. | |
1338 | */ | |
906d15fb CH |
1339 | error = scsi_ioctl_block_when_processing_errors(sdp, cmd, |
1340 | (mode & FMODE_NDELAY) != 0); | |
1341 | if (error) | |
8a6cfeb6 | 1342 | goto out; |
1da177e4 | 1343 | |
1da177e4 LT |
1344 | /* |
1345 | * Send SCSI addressing ioctls directly to mid level, send other | |
1346 | * ioctls to block level and then onto mid level if they can't be | |
1347 | * resolved. | |
1348 | */ | |
1349 | switch (cmd) { | |
1350 | case SCSI_IOCTL_GET_IDLUN: | |
1351 | case SCSI_IOCTL_GET_BUS_NUMBER: | |
8a6cfeb6 AB |
1352 | error = scsi_ioctl(sdp, cmd, p); |
1353 | break; | |
1da177e4 | 1354 | default: |
577ebb37 | 1355 | error = scsi_cmd_blk_ioctl(bdev, mode, cmd, p); |
1da177e4 | 1356 | if (error != -ENOTTY) |
8a6cfeb6 AB |
1357 | break; |
1358 | error = scsi_ioctl(sdp, cmd, p); | |
1359 | break; | |
1da177e4 | 1360 | } |
8a6cfeb6 | 1361 | out: |
8a6cfeb6 | 1362 | return error; |
1da177e4 LT |
1363 | } |
1364 | ||
1365 | static void set_media_not_present(struct scsi_disk *sdkp) | |
1366 | { | |
2bae0093 TH |
1367 | if (sdkp->media_present) |
1368 | sdkp->device->changed = 1; | |
1369 | ||
1370 | if (sdkp->device->removable) { | |
1371 | sdkp->media_present = 0; | |
1372 | sdkp->capacity = 0; | |
1373 | } | |
1374 | } | |
1375 | ||
1376 | static int media_not_present(struct scsi_disk *sdkp, | |
1377 | struct scsi_sense_hdr *sshdr) | |
1378 | { | |
1379 | if (!scsi_sense_valid(sshdr)) | |
1380 | return 0; | |
1381 | ||
1382 | /* not invoked for commands that could return deferred errors */ | |
1383 | switch (sshdr->sense_key) { | |
1384 | case UNIT_ATTENTION: | |
1385 | case NOT_READY: | |
1386 | /* medium not present */ | |
1387 | if (sshdr->asc == 0x3A) { | |
1388 | set_media_not_present(sdkp); | |
1389 | return 1; | |
1390 | } | |
1391 | } | |
1392 | return 0; | |
1da177e4 LT |
1393 | } |
1394 | ||
1395 | /** | |
2bae0093 TH |
1396 | * sd_check_events - check media events |
1397 | * @disk: kernel device descriptor | |
1398 | * @clearing: disk events currently being cleared | |
1da177e4 | 1399 | * |
2bae0093 | 1400 | * Returns mask of DISK_EVENT_*. |
1da177e4 LT |
1401 | * |
1402 | * Note: this function is invoked from the block subsystem. | |
1403 | **/ | |
2bae0093 | 1404 | static unsigned int sd_check_events(struct gendisk *disk, unsigned int clearing) |
1da177e4 LT |
1405 | { |
1406 | struct scsi_disk *sdkp = scsi_disk(disk); | |
1407 | struct scsi_device *sdp = sdkp->device; | |
001aac25 | 1408 | struct scsi_sense_hdr *sshdr = NULL; |
1da177e4 LT |
1409 | int retval; |
1410 | ||
2bae0093 | 1411 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_check_events\n")); |
1da177e4 LT |
1412 | |
1413 | /* | |
1414 | * If the device is offline, don't send any commands - just pretend as | |
1415 | * if the command failed. If the device ever comes back online, we | |
1416 | * can deal with it then. It is only because of unrecoverable errors | |
1417 | * that we would ever take a device offline in the first place. | |
1418 | */ | |
285e9670 KS |
1419 | if (!scsi_device_online(sdp)) { |
1420 | set_media_not_present(sdkp); | |
285e9670 KS |
1421 | goto out; |
1422 | } | |
1da177e4 LT |
1423 | |
1424 | /* | |
1425 | * Using TEST_UNIT_READY enables differentiation between drive with | |
1426 | * no cartridge loaded - NOT READY, drive with changed cartridge - | |
1427 | * UNIT ATTENTION, or with same cartridge - GOOD STATUS. | |
1428 | * | |
1429 | * Drives that auto spin down. eg iomega jaz 1G, will be started | |
1430 | * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever | |
1431 | * sd_revalidate() is called. | |
1432 | */ | |
1433 | retval = -ENODEV; | |
285e9670 | 1434 | |
001aac25 JB |
1435 | if (scsi_block_when_processing_errors(sdp)) { |
1436 | sshdr = kzalloc(sizeof(*sshdr), GFP_KERNEL); | |
1437 | retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, SD_MAX_RETRIES, | |
1438 | sshdr); | |
1439 | } | |
1da177e4 | 1440 | |
2bae0093 TH |
1441 | /* failed to execute TUR, assume media not present */ |
1442 | if (host_byte(retval)) { | |
285e9670 | 1443 | set_media_not_present(sdkp); |
285e9670 KS |
1444 | goto out; |
1445 | } | |
1da177e4 | 1446 | |
2bae0093 TH |
1447 | if (media_not_present(sdkp, sshdr)) |
1448 | goto out; | |
1449 | ||
1da177e4 LT |
1450 | /* |
1451 | * For removable scsi disk we have to recognise the presence | |
2bae0093 | 1452 | * of a disk in the drive. |
1da177e4 | 1453 | */ |
2bae0093 TH |
1454 | if (!sdkp->media_present) |
1455 | sdp->changed = 1; | |
1da177e4 | 1456 | sdkp->media_present = 1; |
285e9670 | 1457 | out: |
3ff5588d | 1458 | /* |
2bae0093 | 1459 | * sdp->changed is set under the following conditions: |
3ff5588d | 1460 | * |
2bae0093 TH |
1461 | * Medium present state has changed in either direction. |
1462 | * Device has indicated UNIT_ATTENTION. | |
3ff5588d | 1463 | */ |
001aac25 | 1464 | kfree(sshdr); |
2bae0093 TH |
1465 | retval = sdp->changed ? DISK_EVENT_MEDIA_CHANGE : 0; |
1466 | sdp->changed = 0; | |
1da177e4 | 1467 | return retval; |
1da177e4 LT |
1468 | } |
1469 | ||
e73aec82 | 1470 | static int sd_sync_cache(struct scsi_disk *sdkp) |
1da177e4 | 1471 | { |
1da177e4 | 1472 | int retries, res; |
e73aec82 | 1473 | struct scsi_device *sdp = sdkp->device; |
7e660100 JB |
1474 | const int timeout = sdp->request_queue->rq_timeout |
1475 | * SD_FLUSH_TIMEOUT_MULTIPLIER; | |
ea73a9f2 | 1476 | struct scsi_sense_hdr sshdr; |
1da177e4 LT |
1477 | |
1478 | if (!scsi_device_online(sdp)) | |
1479 | return -ENODEV; | |
1480 | ||
1da177e4 LT |
1481 | for (retries = 3; retries > 0; --retries) { |
1482 | unsigned char cmd[10] = { 0 }; | |
1483 | ||
1484 | cmd[0] = SYNCHRONIZE_CACHE; | |
1485 | /* | |
1486 | * Leave the rest of the command zero to indicate | |
1487 | * flush everything. | |
1488 | */ | |
9b21493c | 1489 | res = scsi_execute_req_flags(sdp, cmd, DMA_NONE, NULL, 0, |
7e660100 JB |
1490 | &sshdr, timeout, SD_MAX_RETRIES, |
1491 | NULL, REQ_PM); | |
ea73a9f2 | 1492 | if (res == 0) |
1da177e4 LT |
1493 | break; |
1494 | } | |
1495 | ||
e73aec82 | 1496 | if (res) { |
ef61329d | 1497 | sd_print_result(sdkp, "Synchronize Cache(10) failed", res); |
95897910 | 1498 | |
e73aec82 MP |
1499 | if (driver_byte(res) & DRIVER_SENSE) |
1500 | sd_print_sense_hdr(sdkp, &sshdr); | |
95897910 ON |
1501 | /* we need to evaluate the error return */ |
1502 | if (scsi_sense_valid(&sshdr) && | |
7aae5134 AS |
1503 | (sshdr.asc == 0x3a || /* medium not present */ |
1504 | sshdr.asc == 0x20)) /* invalid command */ | |
95897910 ON |
1505 | /* this is no error here */ |
1506 | return 0; | |
1507 | ||
1508 | switch (host_byte(res)) { | |
1509 | /* ignore errors due to racing a disconnection */ | |
1510 | case DID_BAD_TARGET: | |
1511 | case DID_NO_CONNECT: | |
1512 | return 0; | |
1513 | /* signal the upper layer it might try again */ | |
1514 | case DID_BUS_BUSY: | |
1515 | case DID_IMM_RETRY: | |
1516 | case DID_REQUEUE: | |
1517 | case DID_SOFT_ERROR: | |
1518 | return -EBUSY; | |
1519 | default: | |
1520 | return -EIO; | |
1521 | } | |
1da177e4 | 1522 | } |
3721050a | 1523 | return 0; |
1da177e4 LT |
1524 | } |
1525 | ||
1da177e4 LT |
1526 | static void sd_rescan(struct device *dev) |
1527 | { | |
39b7f1e2 AS |
1528 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
1529 | ||
1530 | if (sdkp) { | |
f98a8cae | 1531 | revalidate_disk(sdkp->disk); |
39b7f1e2 AS |
1532 | scsi_disk_put(sdkp); |
1533 | } | |
1da177e4 LT |
1534 | } |
1535 | ||
1536 | ||
1537 | #ifdef CONFIG_COMPAT | |
1538 | /* | |
1539 | * This gets directly called from VFS. When the ioctl | |
1540 | * is not recognized we go back to the other translation paths. | |
1541 | */ | |
0338e291 AV |
1542 | static int sd_compat_ioctl(struct block_device *bdev, fmode_t mode, |
1543 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1544 | { |
0338e291 | 1545 | struct scsi_device *sdev = scsi_disk(bdev->bd_disk)->device; |
21a9d4c9 | 1546 | int error; |
1da177e4 | 1547 | |
21a9d4c9 CH |
1548 | error = scsi_ioctl_block_when_processing_errors(sdev, cmd, |
1549 | (mode & FMODE_NDELAY) != 0); | |
1550 | if (error) | |
1551 | return error; | |
1da177e4 | 1552 | |
1da177e4 LT |
1553 | /* |
1554 | * Let the static ioctl translation table take care of it. | |
1555 | */ | |
21a9d4c9 CH |
1556 | if (!sdev->host->hostt->compat_ioctl) |
1557 | return -ENOIOCTLCMD; | |
1558 | return sdev->host->hostt->compat_ioctl(sdev, cmd, (void __user *)arg); | |
1da177e4 LT |
1559 | } |
1560 | #endif | |
1561 | ||
83d5cde4 | 1562 | static const struct block_device_operations sd_fops = { |
1da177e4 | 1563 | .owner = THIS_MODULE, |
0338e291 AV |
1564 | .open = sd_open, |
1565 | .release = sd_release, | |
8a6cfeb6 | 1566 | .ioctl = sd_ioctl, |
a885c8c4 | 1567 | .getgeo = sd_getgeo, |
1da177e4 | 1568 | #ifdef CONFIG_COMPAT |
0338e291 | 1569 | .compat_ioctl = sd_compat_ioctl, |
1da177e4 | 1570 | #endif |
2bae0093 | 1571 | .check_events = sd_check_events, |
1da177e4 | 1572 | .revalidate_disk = sd_revalidate_disk, |
72ec24bd | 1573 | .unlock_native_capacity = sd_unlock_native_capacity, |
1da177e4 LT |
1574 | }; |
1575 | ||
18a4d0a2 MP |
1576 | /** |
1577 | * sd_eh_action - error handling callback | |
1578 | * @scmd: sd-issued command that has failed | |
18a4d0a2 MP |
1579 | * @eh_disp: The recovery disposition suggested by the midlayer |
1580 | * | |
2451079b JB |
1581 | * This function is called by the SCSI midlayer upon completion of an |
1582 | * error test command (currently TEST UNIT READY). The result of sending | |
1583 | * the eh command is passed in eh_disp. We're looking for devices that | |
1584 | * fail medium access commands but are OK with non access commands like | |
1585 | * test unit ready (so wrongly see the device as having a successful | |
1586 | * recovery) | |
18a4d0a2 | 1587 | **/ |
2451079b | 1588 | static int sd_eh_action(struct scsi_cmnd *scmd, int eh_disp) |
18a4d0a2 MP |
1589 | { |
1590 | struct scsi_disk *sdkp = scsi_disk(scmd->request->rq_disk); | |
1591 | ||
1592 | if (!scsi_device_online(scmd->device) || | |
2451079b JB |
1593 | !scsi_medium_access_command(scmd) || |
1594 | host_byte(scmd->result) != DID_TIME_OUT || | |
1595 | eh_disp != SUCCESS) | |
18a4d0a2 MP |
1596 | return eh_disp; |
1597 | ||
1598 | /* | |
1599 | * The device has timed out executing a medium access command. | |
1600 | * However, the TEST UNIT READY command sent during error | |
1601 | * handling completed successfully. Either the device is in the | |
1602 | * process of recovering or has it suffered an internal failure | |
1603 | * that prevents access to the storage medium. | |
1604 | */ | |
2451079b | 1605 | sdkp->medium_access_timed_out++; |
18a4d0a2 MP |
1606 | |
1607 | /* | |
1608 | * If the device keeps failing read/write commands but TEST UNIT | |
1609 | * READY always completes successfully we assume that medium | |
1610 | * access is no longer possible and take the device offline. | |
1611 | */ | |
1612 | if (sdkp->medium_access_timed_out >= sdkp->max_medium_access_timeouts) { | |
1613 | scmd_printk(KERN_ERR, scmd, | |
1614 | "Medium access timeout failure. Offlining disk!\n"); | |
1615 | scsi_device_set_state(scmd->device, SDEV_OFFLINE); | |
1616 | ||
1617 | return FAILED; | |
1618 | } | |
1619 | ||
1620 | return eh_disp; | |
1621 | } | |
1622 | ||
af55ff67 MP |
1623 | static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd) |
1624 | { | |
83096ebf TH |
1625 | u64 start_lba = blk_rq_pos(scmd->request); |
1626 | u64 end_lba = blk_rq_pos(scmd->request) + (scsi_bufflen(scmd) / 512); | |
af55ff67 MP |
1627 | u64 bad_lba; |
1628 | int info_valid; | |
a8733c7b JB |
1629 | /* |
1630 | * resid is optional but mostly filled in. When it's unused, | |
1631 | * its value is zero, so we assume the whole buffer transferred | |
1632 | */ | |
1633 | unsigned int transferred = scsi_bufflen(scmd) - scsi_get_resid(scmd); | |
1634 | unsigned int good_bytes; | |
af55ff67 | 1635 | |
33659ebb | 1636 | if (scmd->request->cmd_type != REQ_TYPE_FS) |
af55ff67 MP |
1637 | return 0; |
1638 | ||
1639 | info_valid = scsi_get_sense_info_fld(scmd->sense_buffer, | |
1640 | SCSI_SENSE_BUFFERSIZE, | |
1641 | &bad_lba); | |
1642 | if (!info_valid) | |
1643 | return 0; | |
1644 | ||
1645 | if (scsi_bufflen(scmd) <= scmd->device->sector_size) | |
1646 | return 0; | |
1647 | ||
1648 | if (scmd->device->sector_size < 512) { | |
1649 | /* only legitimate sector_size here is 256 */ | |
1650 | start_lba <<= 1; | |
1651 | end_lba <<= 1; | |
1652 | } else { | |
1653 | /* be careful ... don't want any overflows */ | |
ef80d1e1 | 1654 | unsigned int factor = scmd->device->sector_size / 512; |
af55ff67 MP |
1655 | do_div(start_lba, factor); |
1656 | do_div(end_lba, factor); | |
1657 | } | |
1658 | ||
1659 | /* The bad lba was reported incorrectly, we have no idea where | |
1660 | * the error is. | |
1661 | */ | |
1662 | if (bad_lba < start_lba || bad_lba >= end_lba) | |
1663 | return 0; | |
1664 | ||
1665 | /* This computation should always be done in terms of | |
1666 | * the resolution of the device's medium. | |
1667 | */ | |
a8733c7b JB |
1668 | good_bytes = (bad_lba - start_lba) * scmd->device->sector_size; |
1669 | return min(good_bytes, transferred); | |
af55ff67 MP |
1670 | } |
1671 | ||
1da177e4 | 1672 | /** |
7b3d9545 | 1673 | * sd_done - bottom half handler: called when the lower level |
1da177e4 LT |
1674 | * driver has completed (successfully or otherwise) a scsi command. |
1675 | * @SCpnt: mid-level's per command structure. | |
1676 | * | |
1677 | * Note: potentially run from within an ISR. Must not block. | |
1678 | **/ | |
7b3d9545 | 1679 | static int sd_done(struct scsi_cmnd *SCpnt) |
1da177e4 LT |
1680 | { |
1681 | int result = SCpnt->result; | |
af55ff67 | 1682 | unsigned int good_bytes = result ? 0 : scsi_bufflen(SCpnt); |
1da177e4 | 1683 | struct scsi_sense_hdr sshdr; |
4e7392ec | 1684 | struct scsi_disk *sdkp = scsi_disk(SCpnt->request->rq_disk); |
26e85fcd | 1685 | struct request *req = SCpnt->request; |
1da177e4 LT |
1686 | int sense_valid = 0; |
1687 | int sense_deferred = 0; | |
c98a0eb0 | 1688 | unsigned char op = SCpnt->cmnd[0]; |
5db44863 | 1689 | unsigned char unmap = SCpnt->cmnd[1] & 8; |
1da177e4 | 1690 | |
5db44863 | 1691 | if (req->cmd_flags & REQ_DISCARD || req->cmd_flags & REQ_WRITE_SAME) { |
26e85fcd MP |
1692 | if (!result) { |
1693 | good_bytes = blk_rq_bytes(req); | |
1694 | scsi_set_resid(SCpnt, 0); | |
1695 | } else { | |
1696 | good_bytes = 0; | |
1697 | scsi_set_resid(SCpnt, blk_rq_bytes(req)); | |
1698 | } | |
1699 | } | |
6a32a8ae | 1700 | |
1da177e4 LT |
1701 | if (result) { |
1702 | sense_valid = scsi_command_normalize_sense(SCpnt, &sshdr); | |
1703 | if (sense_valid) | |
1704 | sense_deferred = scsi_sense_is_deferred(&sshdr); | |
1705 | } | |
2a863ba8 DJ |
1706 | sdkp->medium_access_timed_out = 0; |
1707 | ||
03aba2f7 LT |
1708 | if (driver_byte(result) != DRIVER_SENSE && |
1709 | (!sense_valid || sense_deferred)) | |
1710 | goto out; | |
1711 | ||
1712 | switch (sshdr.sense_key) { | |
1713 | case HARDWARE_ERROR: | |
1714 | case MEDIUM_ERROR: | |
af55ff67 | 1715 | good_bytes = sd_completed_bytes(SCpnt); |
03aba2f7 LT |
1716 | break; |
1717 | case RECOVERED_ERROR: | |
af55ff67 MP |
1718 | good_bytes = scsi_bufflen(SCpnt); |
1719 | break; | |
10dab226 JW |
1720 | case NO_SENSE: |
1721 | /* This indicates a false check condition, so ignore it. An | |
1722 | * unknown amount of data was transferred so treat it as an | |
1723 | * error. | |
1724 | */ | |
10dab226 JW |
1725 | SCpnt->result = 0; |
1726 | memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); | |
1727 | break; | |
c98a0eb0 MP |
1728 | case ABORTED_COMMAND: |
1729 | if (sshdr.asc == 0x10) /* DIF: Target detected corruption */ | |
1730 | good_bytes = sd_completed_bytes(SCpnt); | |
1731 | break; | |
1732 | case ILLEGAL_REQUEST: | |
1733 | if (sshdr.asc == 0x10) /* DIX: Host detected corruption */ | |
af55ff67 | 1734 | good_bytes = sd_completed_bytes(SCpnt); |
c98a0eb0 | 1735 | /* INVALID COMMAND OPCODE or INVALID FIELD IN CDB */ |
5db44863 MP |
1736 | if (sshdr.asc == 0x20 || sshdr.asc == 0x24) { |
1737 | switch (op) { | |
1738 | case UNMAP: | |
1739 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
1740 | break; | |
1741 | case WRITE_SAME_16: | |
1742 | case WRITE_SAME: | |
1743 | if (unmap) | |
1744 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
1745 | else { | |
1746 | sdkp->device->no_write_same = 1; | |
1747 | sd_config_write_same(sdkp); | |
1748 | ||
1749 | good_bytes = 0; | |
1750 | req->__data_len = blk_rq_bytes(req); | |
1751 | req->cmd_flags |= REQ_QUIET; | |
1752 | } | |
1753 | } | |
1754 | } | |
03aba2f7 LT |
1755 | break; |
1756 | default: | |
1757 | break; | |
1da177e4 | 1758 | } |
03aba2f7 | 1759 | out: |
ef61329d HR |
1760 | SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO, SCpnt, |
1761 | "sd_done: completed %d of %d bytes\n", | |
1762 | good_bytes, scsi_bufflen(SCpnt))); | |
1763 | ||
af55ff67 MP |
1764 | if (rq_data_dir(SCpnt->request) == READ && scsi_prot_sg_count(SCpnt)) |
1765 | sd_dif_complete(SCpnt, good_bytes); | |
1766 | ||
7b3d9545 | 1767 | return good_bytes; |
1da177e4 LT |
1768 | } |
1769 | ||
1da177e4 LT |
1770 | /* |
1771 | * spinup disk - called only in sd_revalidate_disk() | |
1772 | */ | |
1773 | static void | |
e73aec82 | 1774 | sd_spinup_disk(struct scsi_disk *sdkp) |
ea73a9f2 | 1775 | { |
1da177e4 | 1776 | unsigned char cmd[10]; |
4451e472 | 1777 | unsigned long spintime_expire = 0; |
1da177e4 LT |
1778 | int retries, spintime; |
1779 | unsigned int the_result; | |
1780 | struct scsi_sense_hdr sshdr; | |
1781 | int sense_valid = 0; | |
1782 | ||
1783 | spintime = 0; | |
1784 | ||
1785 | /* Spin up drives, as required. Only do this at boot time */ | |
1786 | /* Spinup needs to be done for module loads too. */ | |
1787 | do { | |
1788 | retries = 0; | |
1789 | ||
1790 | do { | |
1791 | cmd[0] = TEST_UNIT_READY; | |
1792 | memset((void *) &cmd[1], 0, 9); | |
1793 | ||
ea73a9f2 JB |
1794 | the_result = scsi_execute_req(sdkp->device, cmd, |
1795 | DMA_NONE, NULL, 0, | |
1796 | &sshdr, SD_TIMEOUT, | |
f4f4e47e | 1797 | SD_MAX_RETRIES, NULL); |
1da177e4 | 1798 | |
b4d38e38 AS |
1799 | /* |
1800 | * If the drive has indicated to us that it | |
1801 | * doesn't have any media in it, don't bother | |
1802 | * with any more polling. | |
1803 | */ | |
1804 | if (media_not_present(sdkp, &sshdr)) | |
1805 | return; | |
1806 | ||
1da177e4 | 1807 | if (the_result) |
ea73a9f2 | 1808 | sense_valid = scsi_sense_valid(&sshdr); |
1da177e4 LT |
1809 | retries++; |
1810 | } while (retries < 3 && | |
1811 | (!scsi_status_is_good(the_result) || | |
1812 | ((driver_byte(the_result) & DRIVER_SENSE) && | |
1813 | sense_valid && sshdr.sense_key == UNIT_ATTENTION))); | |
1814 | ||
1da177e4 LT |
1815 | if ((driver_byte(the_result) & DRIVER_SENSE) == 0) { |
1816 | /* no sense, TUR either succeeded or failed | |
1817 | * with a status error */ | |
e73aec82 | 1818 | if(!spintime && !scsi_status_is_good(the_result)) { |
ef61329d HR |
1819 | sd_print_result(sdkp, "Test Unit Ready failed", |
1820 | the_result); | |
e73aec82 | 1821 | } |
1da177e4 LT |
1822 | break; |
1823 | } | |
ef61329d | 1824 | |
1da177e4 LT |
1825 | /* |
1826 | * The device does not want the automatic start to be issued. | |
1827 | */ | |
33dd6f92 | 1828 | if (sdkp->device->no_start_on_add) |
1da177e4 | 1829 | break; |
1da177e4 | 1830 | |
33dd6f92 MW |
1831 | if (sense_valid && sshdr.sense_key == NOT_READY) { |
1832 | if (sshdr.asc == 4 && sshdr.ascq == 3) | |
1833 | break; /* manual intervention required */ | |
1834 | if (sshdr.asc == 4 && sshdr.ascq == 0xb) | |
1835 | break; /* standby */ | |
1836 | if (sshdr.asc == 4 && sshdr.ascq == 0xc) | |
1837 | break; /* unavailable */ | |
1838 | /* | |
1839 | * Issue command to spin up drive when not ready | |
1840 | */ | |
1da177e4 | 1841 | if (!spintime) { |
e73aec82 | 1842 | sd_printk(KERN_NOTICE, sdkp, "Spinning up disk..."); |
1da177e4 LT |
1843 | cmd[0] = START_STOP; |
1844 | cmd[1] = 1; /* Return immediately */ | |
1845 | memset((void *) &cmd[2], 0, 8); | |
1846 | cmd[4] = 1; /* Start spin cycle */ | |
d2886ea3 SR |
1847 | if (sdkp->device->start_stop_pwr_cond) |
1848 | cmd[4] |= 1 << 4; | |
ea73a9f2 JB |
1849 | scsi_execute_req(sdkp->device, cmd, DMA_NONE, |
1850 | NULL, 0, &sshdr, | |
f4f4e47e FT |
1851 | SD_TIMEOUT, SD_MAX_RETRIES, |
1852 | NULL); | |
4451e472 AS |
1853 | spintime_expire = jiffies + 100 * HZ; |
1854 | spintime = 1; | |
1da177e4 | 1855 | } |
1da177e4 LT |
1856 | /* Wait 1 second for next try */ |
1857 | msleep(1000); | |
1858 | printk("."); | |
4451e472 AS |
1859 | |
1860 | /* | |
1861 | * Wait for USB flash devices with slow firmware. | |
1862 | * Yes, this sense key/ASC combination shouldn't | |
1863 | * occur here. It's characteristic of these devices. | |
1864 | */ | |
1865 | } else if (sense_valid && | |
1866 | sshdr.sense_key == UNIT_ATTENTION && | |
1867 | sshdr.asc == 0x28) { | |
1868 | if (!spintime) { | |
1869 | spintime_expire = jiffies + 5 * HZ; | |
1870 | spintime = 1; | |
1871 | } | |
1872 | /* Wait 1 second for next try */ | |
1873 | msleep(1000); | |
1da177e4 LT |
1874 | } else { |
1875 | /* we don't understand the sense code, so it's | |
1876 | * probably pointless to loop */ | |
1877 | if(!spintime) { | |
e73aec82 MP |
1878 | sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n"); |
1879 | sd_print_sense_hdr(sdkp, &sshdr); | |
1da177e4 LT |
1880 | } |
1881 | break; | |
1882 | } | |
1883 | ||
4451e472 | 1884 | } while (spintime && time_before_eq(jiffies, spintime_expire)); |
1da177e4 LT |
1885 | |
1886 | if (spintime) { | |
1887 | if (scsi_status_is_good(the_result)) | |
1888 | printk("ready\n"); | |
1889 | else | |
1890 | printk("not responding...\n"); | |
1891 | } | |
1892 | } | |
1893 | ||
e0597d70 MP |
1894 | |
1895 | /* | |
1896 | * Determine whether disk supports Data Integrity Field. | |
1897 | */ | |
fe542396 | 1898 | static int sd_read_protection_type(struct scsi_disk *sdkp, unsigned char *buffer) |
e0597d70 MP |
1899 | { |
1900 | struct scsi_device *sdp = sdkp->device; | |
1901 | u8 type; | |
fe542396 | 1902 | int ret = 0; |
e0597d70 MP |
1903 | |
1904 | if (scsi_device_protection(sdp) == 0 || (buffer[12] & 1) == 0) | |
fe542396 | 1905 | return ret; |
35e1a5d9 MP |
1906 | |
1907 | type = ((buffer[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */ | |
1908 | ||
fe542396 MP |
1909 | if (type > SD_DIF_TYPE3_PROTECTION) |
1910 | ret = -ENODEV; | |
1911 | else if (scsi_host_dif_capable(sdp->host, type)) | |
1912 | ret = 1; | |
1913 | ||
1914 | if (sdkp->first_scan || type != sdkp->protection_type) | |
1915 | switch (ret) { | |
1916 | case -ENODEV: | |
1917 | sd_printk(KERN_ERR, sdkp, "formatted with unsupported" \ | |
1918 | " protection type %u. Disabling disk!\n", | |
1919 | type); | |
1920 | break; | |
1921 | case 1: | |
1922 | sd_printk(KERN_NOTICE, sdkp, | |
1923 | "Enabling DIF Type %u protection\n", type); | |
1924 | break; | |
1925 | case 0: | |
1926 | sd_printk(KERN_NOTICE, sdkp, | |
1927 | "Disabling DIF Type %u protection\n", type); | |
1928 | break; | |
1929 | } | |
e0597d70 | 1930 | |
be922f47 MP |
1931 | sdkp->protection_type = type; |
1932 | ||
fe542396 | 1933 | return ret; |
e0597d70 MP |
1934 | } |
1935 | ||
0da205e0 MW |
1936 | static void read_capacity_error(struct scsi_disk *sdkp, struct scsi_device *sdp, |
1937 | struct scsi_sense_hdr *sshdr, int sense_valid, | |
1938 | int the_result) | |
1939 | { | |
0da205e0 MW |
1940 | if (driver_byte(the_result) & DRIVER_SENSE) |
1941 | sd_print_sense_hdr(sdkp, sshdr); | |
1942 | else | |
1943 | sd_printk(KERN_NOTICE, sdkp, "Sense not available.\n"); | |
1944 | ||
1945 | /* | |
1946 | * Set dirty bit for removable devices if not ready - | |
1947 | * sometimes drives will not report this properly. | |
1948 | */ | |
1949 | if (sdp->removable && | |
1950 | sense_valid && sshdr->sense_key == NOT_READY) | |
2bae0093 | 1951 | set_media_not_present(sdkp); |
0da205e0 MW |
1952 | |
1953 | /* | |
1954 | * We used to set media_present to 0 here to indicate no media | |
1955 | * in the drive, but some drives fail read capacity even with | |
1956 | * media present, so we can't do that. | |
1957 | */ | |
1958 | sdkp->capacity = 0; /* unknown mapped to zero - as usual */ | |
1959 | } | |
1960 | ||
1961 | #define RC16_LEN 32 | |
1962 | #if RC16_LEN > SD_BUF_SIZE | |
1963 | #error RC16_LEN must not be more than SD_BUF_SIZE | |
1964 | #endif | |
1965 | ||
3233ac19 JB |
1966 | #define READ_CAPACITY_RETRIES_ON_RESET 10 |
1967 | ||
0da205e0 MW |
1968 | static int read_capacity_16(struct scsi_disk *sdkp, struct scsi_device *sdp, |
1969 | unsigned char *buffer) | |
ea73a9f2 | 1970 | { |
1da177e4 | 1971 | unsigned char cmd[16]; |
1da177e4 LT |
1972 | struct scsi_sense_hdr sshdr; |
1973 | int sense_valid = 0; | |
0da205e0 | 1974 | int the_result; |
3233ac19 | 1975 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
ea09bcc9 | 1976 | unsigned int alignment; |
0da205e0 MW |
1977 | unsigned long long lba; |
1978 | unsigned sector_size; | |
1da177e4 | 1979 | |
5ce524bd HG |
1980 | if (sdp->no_read_capacity_16) |
1981 | return -EINVAL; | |
1982 | ||
1da177e4 | 1983 | do { |
0da205e0 | 1984 | memset(cmd, 0, 16); |
eb846d9f | 1985 | cmd[0] = SERVICE_ACTION_IN_16; |
0da205e0 MW |
1986 | cmd[1] = SAI_READ_CAPACITY_16; |
1987 | cmd[13] = RC16_LEN; | |
1988 | memset(buffer, 0, RC16_LEN); | |
1989 | ||
ea73a9f2 | 1990 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, |
0da205e0 MW |
1991 | buffer, RC16_LEN, &sshdr, |
1992 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
1da177e4 | 1993 | |
ea73a9f2 | 1994 | if (media_not_present(sdkp, &sshdr)) |
0da205e0 | 1995 | return -ENODEV; |
1da177e4 | 1996 | |
2b301307 | 1997 | if (the_result) { |
ea73a9f2 | 1998 | sense_valid = scsi_sense_valid(&sshdr); |
2b301307 MW |
1999 | if (sense_valid && |
2000 | sshdr.sense_key == ILLEGAL_REQUEST && | |
2001 | (sshdr.asc == 0x20 || sshdr.asc == 0x24) && | |
2002 | sshdr.ascq == 0x00) | |
2003 | /* Invalid Command Operation Code or | |
2004 | * Invalid Field in CDB, just retry | |
2005 | * silently with RC10 */ | |
2006 | return -EINVAL; | |
3233ac19 JB |
2007 | if (sense_valid && |
2008 | sshdr.sense_key == UNIT_ATTENTION && | |
2009 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) | |
2010 | /* Device reset might occur several times, | |
2011 | * give it one more chance */ | |
2012 | if (--reset_retries > 0) | |
2013 | continue; | |
2b301307 | 2014 | } |
1da177e4 LT |
2015 | retries--; |
2016 | ||
2017 | } while (the_result && retries); | |
2018 | ||
0da205e0 | 2019 | if (the_result) { |
ef61329d | 2020 | sd_print_result(sdkp, "Read Capacity(16) failed", the_result); |
0da205e0 MW |
2021 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); |
2022 | return -EINVAL; | |
2023 | } | |
e73aec82 | 2024 | |
8f76d151 DH |
2025 | sector_size = get_unaligned_be32(&buffer[8]); |
2026 | lba = get_unaligned_be64(&buffer[0]); | |
0da205e0 | 2027 | |
fe542396 MP |
2028 | if (sd_read_protection_type(sdkp, buffer) < 0) { |
2029 | sdkp->capacity = 0; | |
2030 | return -ENODEV; | |
2031 | } | |
0da205e0 MW |
2032 | |
2033 | if ((sizeof(sdkp->capacity) == 4) && (lba >= 0xffffffffULL)) { | |
2034 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a " | |
2035 | "kernel compiled with support for large block " | |
2036 | "devices.\n"); | |
2037 | sdkp->capacity = 0; | |
2038 | return -EOVERFLOW; | |
2039 | } | |
2040 | ||
ea09bcc9 | 2041 | /* Logical blocks per physical block exponent */ |
526f7c79 | 2042 | sdkp->physical_block_size = (1 << (buffer[13] & 0xf)) * sector_size; |
ea09bcc9 MP |
2043 | |
2044 | /* Lowest aligned logical block */ | |
2045 | alignment = ((buffer[14] & 0x3f) << 8 | buffer[15]) * sector_size; | |
2046 | blk_queue_alignment_offset(sdp->request_queue, alignment); | |
2047 | if (alignment && sdkp->first_scan) | |
2048 | sd_printk(KERN_NOTICE, sdkp, | |
2049 | "physical block alignment offset: %u\n", alignment); | |
2050 | ||
c98a0eb0 MP |
2051 | if (buffer[14] & 0x80) { /* LBPME */ |
2052 | sdkp->lbpme = 1; | |
e339c1a7 | 2053 | |
c98a0eb0 MP |
2054 | if (buffer[14] & 0x40) /* LBPRZ */ |
2055 | sdkp->lbprz = 1; | |
e339c1a7 | 2056 | |
c98a0eb0 | 2057 | sd_config_discard(sdkp, SD_LBP_WS16); |
e339c1a7 MP |
2058 | } |
2059 | ||
0da205e0 MW |
2060 | sdkp->capacity = lba + 1; |
2061 | return sector_size; | |
2062 | } | |
2063 | ||
2064 | static int read_capacity_10(struct scsi_disk *sdkp, struct scsi_device *sdp, | |
2065 | unsigned char *buffer) | |
2066 | { | |
2067 | unsigned char cmd[16]; | |
2068 | struct scsi_sense_hdr sshdr; | |
2069 | int sense_valid = 0; | |
2070 | int the_result; | |
3233ac19 | 2071 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
0da205e0 MW |
2072 | sector_t lba; |
2073 | unsigned sector_size; | |
2074 | ||
2075 | do { | |
2076 | cmd[0] = READ_CAPACITY; | |
2077 | memset(&cmd[1], 0, 9); | |
2078 | memset(buffer, 0, 8); | |
2079 | ||
2080 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, | |
2081 | buffer, 8, &sshdr, | |
2082 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
2083 | ||
2084 | if (media_not_present(sdkp, &sshdr)) | |
2085 | return -ENODEV; | |
2086 | ||
3233ac19 | 2087 | if (the_result) { |
0da205e0 | 2088 | sense_valid = scsi_sense_valid(&sshdr); |
3233ac19 JB |
2089 | if (sense_valid && |
2090 | sshdr.sense_key == UNIT_ATTENTION && | |
2091 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) | |
2092 | /* Device reset might occur several times, | |
2093 | * give it one more chance */ | |
2094 | if (--reset_retries > 0) | |
2095 | continue; | |
2096 | } | |
0da205e0 MW |
2097 | retries--; |
2098 | ||
2099 | } while (the_result && retries); | |
2100 | ||
2101 | if (the_result) { | |
ef61329d | 2102 | sd_print_result(sdkp, "Read Capacity(10) failed", the_result); |
0da205e0 MW |
2103 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); |
2104 | return -EINVAL; | |
2105 | } | |
2106 | ||
8f76d151 DH |
2107 | sector_size = get_unaligned_be32(&buffer[4]); |
2108 | lba = get_unaligned_be32(&buffer[0]); | |
0da205e0 | 2109 | |
5ce524bd HG |
2110 | if (sdp->no_read_capacity_16 && (lba == 0xffffffff)) { |
2111 | /* Some buggy (usb cardreader) devices return an lba of | |
2112 | 0xffffffff when the want to report a size of 0 (with | |
2113 | which they really mean no media is present) */ | |
2114 | sdkp->capacity = 0; | |
5cc10350 | 2115 | sdkp->physical_block_size = sector_size; |
5ce524bd HG |
2116 | return sector_size; |
2117 | } | |
2118 | ||
0da205e0 MW |
2119 | if ((sizeof(sdkp->capacity) == 4) && (lba == 0xffffffff)) { |
2120 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a " | |
2121 | "kernel compiled with support for large block " | |
2122 | "devices.\n"); | |
2123 | sdkp->capacity = 0; | |
2124 | return -EOVERFLOW; | |
2125 | } | |
2126 | ||
2127 | sdkp->capacity = lba + 1; | |
526f7c79 | 2128 | sdkp->physical_block_size = sector_size; |
0da205e0 MW |
2129 | return sector_size; |
2130 | } | |
2131 | ||
2b301307 MW |
2132 | static int sd_try_rc16_first(struct scsi_device *sdp) |
2133 | { | |
f87146bb HR |
2134 | if (sdp->host->max_cmd_len < 16) |
2135 | return 0; | |
6a0bdffa AS |
2136 | if (sdp->try_rc_10_first) |
2137 | return 0; | |
2b301307 MW |
2138 | if (sdp->scsi_level > SCSI_SPC_2) |
2139 | return 1; | |
2140 | if (scsi_device_protection(sdp)) | |
2141 | return 1; | |
2142 | return 0; | |
2143 | } | |
2144 | ||
0da205e0 MW |
2145 | /* |
2146 | * read disk capacity | |
2147 | */ | |
2148 | static void | |
2149 | sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer) | |
2150 | { | |
2151 | int sector_size; | |
2152 | struct scsi_device *sdp = sdkp->device; | |
70a9b873 | 2153 | sector_t old_capacity = sdkp->capacity; |
0da205e0 | 2154 | |
2b301307 | 2155 | if (sd_try_rc16_first(sdp)) { |
0da205e0 MW |
2156 | sector_size = read_capacity_16(sdkp, sdp, buffer); |
2157 | if (sector_size == -EOVERFLOW) | |
1da177e4 | 2158 | goto got_data; |
2b301307 MW |
2159 | if (sector_size == -ENODEV) |
2160 | return; | |
2161 | if (sector_size < 0) | |
2162 | sector_size = read_capacity_10(sdkp, sdp, buffer); | |
0da205e0 MW |
2163 | if (sector_size < 0) |
2164 | return; | |
1da177e4 | 2165 | } else { |
0da205e0 MW |
2166 | sector_size = read_capacity_10(sdkp, sdp, buffer); |
2167 | if (sector_size == -EOVERFLOW) | |
2168 | goto got_data; | |
2169 | if (sector_size < 0) | |
2170 | return; | |
2171 | if ((sizeof(sdkp->capacity) > 4) && | |
2172 | (sdkp->capacity > 0xffffffffULL)) { | |
2173 | int old_sector_size = sector_size; | |
2174 | sd_printk(KERN_NOTICE, sdkp, "Very big device. " | |
2175 | "Trying to use READ CAPACITY(16).\n"); | |
2176 | sector_size = read_capacity_16(sdkp, sdp, buffer); | |
2177 | if (sector_size < 0) { | |
2178 | sd_printk(KERN_NOTICE, sdkp, | |
2179 | "Using 0xffffffff as device size\n"); | |
2180 | sdkp->capacity = 1 + (sector_t) 0xffffffff; | |
2181 | sector_size = old_sector_size; | |
2182 | goto got_data; | |
2183 | } | |
2184 | } | |
2185 | } | |
1da177e4 | 2186 | |
5c211caa AS |
2187 | /* Some devices are known to return the total number of blocks, |
2188 | * not the highest block number. Some devices have versions | |
2189 | * which do this and others which do not. Some devices we might | |
2190 | * suspect of doing this but we don't know for certain. | |
2191 | * | |
2192 | * If we know the reported capacity is wrong, decrement it. If | |
2193 | * we can only guess, then assume the number of blocks is even | |
2194 | * (usually true but not always) and err on the side of lowering | |
2195 | * the capacity. | |
2196 | */ | |
2197 | if (sdp->fix_capacity || | |
2198 | (sdp->guess_capacity && (sdkp->capacity & 0x01))) { | |
2199 | sd_printk(KERN_INFO, sdkp, "Adjusting the sector count " | |
2200 | "from its reported value: %llu\n", | |
2201 | (unsigned long long) sdkp->capacity); | |
1da177e4 | 2202 | --sdkp->capacity; |
61bf54b7 ON |
2203 | } |
2204 | ||
1da177e4 LT |
2205 | got_data: |
2206 | if (sector_size == 0) { | |
2207 | sector_size = 512; | |
e73aec82 MP |
2208 | sd_printk(KERN_NOTICE, sdkp, "Sector size 0 reported, " |
2209 | "assuming 512.\n"); | |
1da177e4 LT |
2210 | } |
2211 | ||
2212 | if (sector_size != 512 && | |
2213 | sector_size != 1024 && | |
2214 | sector_size != 2048 && | |
2215 | sector_size != 4096 && | |
2216 | sector_size != 256) { | |
e73aec82 MP |
2217 | sd_printk(KERN_NOTICE, sdkp, "Unsupported sector size %d.\n", |
2218 | sector_size); | |
1da177e4 LT |
2219 | /* |
2220 | * The user might want to re-format the drive with | |
2221 | * a supported sectorsize. Once this happens, it | |
2222 | * would be relatively trivial to set the thing up. | |
2223 | * For this reason, we leave the thing in the table. | |
2224 | */ | |
2225 | sdkp->capacity = 0; | |
2226 | /* | |
2227 | * set a bogus sector size so the normal read/write | |
2228 | * logic in the block layer will eventually refuse any | |
2229 | * request on this device without tripping over power | |
2230 | * of two sector size assumptions | |
2231 | */ | |
2232 | sector_size = 512; | |
2233 | } | |
e1defc4f | 2234 | blk_queue_logical_block_size(sdp->request_queue, sector_size); |
7404ad3b | 2235 | |
1da177e4 | 2236 | { |
7404ad3b | 2237 | char cap_str_2[10], cap_str_10[10]; |
520a2c27 | 2238 | u64 sz = (u64)sdkp->capacity << ilog2(sector_size); |
1da177e4 | 2239 | |
7404ad3b JB |
2240 | string_get_size(sz, STRING_UNITS_2, cap_str_2, |
2241 | sizeof(cap_str_2)); | |
2242 | string_get_size(sz, STRING_UNITS_10, cap_str_10, | |
2243 | sizeof(cap_str_10)); | |
1da177e4 | 2244 | |
ea09bcc9 | 2245 | if (sdkp->first_scan || old_capacity != sdkp->capacity) { |
70a9b873 | 2246 | sd_printk(KERN_NOTICE, sdkp, |
ea09bcc9 | 2247 | "%llu %d-byte logical blocks: (%s/%s)\n", |
70a9b873 MP |
2248 | (unsigned long long)sdkp->capacity, |
2249 | sector_size, cap_str_10, cap_str_2); | |
ea09bcc9 | 2250 | |
526f7c79 | 2251 | if (sdkp->physical_block_size != sector_size) |
ea09bcc9 MP |
2252 | sd_printk(KERN_NOTICE, sdkp, |
2253 | "%u-byte physical blocks\n", | |
526f7c79 | 2254 | sdkp->physical_block_size); |
ea09bcc9 | 2255 | } |
1da177e4 LT |
2256 | } |
2257 | ||
bcdb247c MP |
2258 | if (sdkp->capacity > 0xffffffff) { |
2259 | sdp->use_16_for_rw = 1; | |
2260 | sdkp->max_xfer_blocks = SD_MAX_XFER_BLOCKS; | |
2261 | } else | |
2262 | sdkp->max_xfer_blocks = SD_DEF_XFER_BLOCKS; | |
53ad570b | 2263 | |
1da177e4 LT |
2264 | /* Rescale capacity to 512-byte units */ |
2265 | if (sector_size == 4096) | |
2266 | sdkp->capacity <<= 3; | |
2267 | else if (sector_size == 2048) | |
2268 | sdkp->capacity <<= 2; | |
2269 | else if (sector_size == 1024) | |
2270 | sdkp->capacity <<= 1; | |
2271 | else if (sector_size == 256) | |
2272 | sdkp->capacity >>= 1; | |
2273 | ||
526f7c79 MP |
2274 | blk_queue_physical_block_size(sdp->request_queue, |
2275 | sdkp->physical_block_size); | |
1da177e4 LT |
2276 | sdkp->device->sector_size = sector_size; |
2277 | } | |
2278 | ||
2279 | /* called with buffer of length 512 */ | |
2280 | static inline int | |
ea73a9f2 JB |
2281 | sd_do_mode_sense(struct scsi_device *sdp, int dbd, int modepage, |
2282 | unsigned char *buffer, int len, struct scsi_mode_data *data, | |
2283 | struct scsi_sense_hdr *sshdr) | |
1da177e4 | 2284 | { |
ea73a9f2 | 2285 | return scsi_mode_sense(sdp, dbd, modepage, buffer, len, |
1cf72699 | 2286 | SD_TIMEOUT, SD_MAX_RETRIES, data, |
ea73a9f2 | 2287 | sshdr); |
1da177e4 LT |
2288 | } |
2289 | ||
2290 | /* | |
2291 | * read write protect setting, if possible - called only in sd_revalidate_disk() | |
48970800 | 2292 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
2293 | */ |
2294 | static void | |
e73aec82 | 2295 | sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer) |
ea73a9f2 | 2296 | { |
1da177e4 | 2297 | int res; |
ea73a9f2 | 2298 | struct scsi_device *sdp = sdkp->device; |
1da177e4 | 2299 | struct scsi_mode_data data; |
70a9b873 | 2300 | int old_wp = sdkp->write_prot; |
1da177e4 LT |
2301 | |
2302 | set_disk_ro(sdkp->disk, 0); | |
ea73a9f2 | 2303 | if (sdp->skip_ms_page_3f) { |
b2bff6ce | 2304 | sd_first_printk(KERN_NOTICE, sdkp, "Assuming Write Enabled\n"); |
1da177e4 LT |
2305 | return; |
2306 | } | |
2307 | ||
ea73a9f2 JB |
2308 | if (sdp->use_192_bytes_for_3f) { |
2309 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 192, &data, NULL); | |
1da177e4 LT |
2310 | } else { |
2311 | /* | |
2312 | * First attempt: ask for all pages (0x3F), but only 4 bytes. | |
2313 | * We have to start carefully: some devices hang if we ask | |
2314 | * for more than is available. | |
2315 | */ | |
ea73a9f2 | 2316 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 4, &data, NULL); |
1da177e4 LT |
2317 | |
2318 | /* | |
2319 | * Second attempt: ask for page 0 When only page 0 is | |
2320 | * implemented, a request for page 3F may return Sense Key | |
2321 | * 5: Illegal Request, Sense Code 24: Invalid field in | |
2322 | * CDB. | |
2323 | */ | |
2324 | if (!scsi_status_is_good(res)) | |
ea73a9f2 | 2325 | res = sd_do_mode_sense(sdp, 0, 0, buffer, 4, &data, NULL); |
1da177e4 LT |
2326 | |
2327 | /* | |
2328 | * Third attempt: ask 255 bytes, as we did earlier. | |
2329 | */ | |
2330 | if (!scsi_status_is_good(res)) | |
ea73a9f2 JB |
2331 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 255, |
2332 | &data, NULL); | |
1da177e4 LT |
2333 | } |
2334 | ||
2335 | if (!scsi_status_is_good(res)) { | |
b2bff6ce | 2336 | sd_first_printk(KERN_WARNING, sdkp, |
e73aec82 | 2337 | "Test WP failed, assume Write Enabled\n"); |
1da177e4 LT |
2338 | } else { |
2339 | sdkp->write_prot = ((data.device_specific & 0x80) != 0); | |
2340 | set_disk_ro(sdkp->disk, sdkp->write_prot); | |
70a9b873 MP |
2341 | if (sdkp->first_scan || old_wp != sdkp->write_prot) { |
2342 | sd_printk(KERN_NOTICE, sdkp, "Write Protect is %s\n", | |
2343 | sdkp->write_prot ? "on" : "off"); | |
2344 | sd_printk(KERN_DEBUG, sdkp, | |
2345 | "Mode Sense: %02x %02x %02x %02x\n", | |
2346 | buffer[0], buffer[1], buffer[2], buffer[3]); | |
2347 | } | |
1da177e4 LT |
2348 | } |
2349 | } | |
2350 | ||
2351 | /* | |
2352 | * sd_read_cache_type - called only from sd_revalidate_disk() | |
48970800 | 2353 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
2354 | */ |
2355 | static void | |
e73aec82 | 2356 | sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer) |
631e8a13 | 2357 | { |
1da177e4 | 2358 | int len = 0, res; |
ea73a9f2 | 2359 | struct scsi_device *sdp = sdkp->device; |
1da177e4 | 2360 | |
631e8a13 AV |
2361 | int dbd; |
2362 | int modepage; | |
0bcaa111 | 2363 | int first_len; |
1da177e4 LT |
2364 | struct scsi_mode_data data; |
2365 | struct scsi_sense_hdr sshdr; | |
70a9b873 MP |
2366 | int old_wce = sdkp->WCE; |
2367 | int old_rcd = sdkp->RCD; | |
2368 | int old_dpofua = sdkp->DPOFUA; | |
1da177e4 | 2369 | |
39c60a09 JB |
2370 | |
2371 | if (sdkp->cache_override) | |
2372 | return; | |
2373 | ||
0bcaa111 LT |
2374 | first_len = 4; |
2375 | if (sdp->skip_ms_page_8) { | |
2376 | if (sdp->type == TYPE_RBC) | |
2377 | goto defaults; | |
2378 | else { | |
2379 | if (sdp->skip_ms_page_3f) | |
2380 | goto defaults; | |
2381 | modepage = 0x3F; | |
2382 | if (sdp->use_192_bytes_for_3f) | |
2383 | first_len = 192; | |
2384 | dbd = 0; | |
2385 | } | |
2386 | } else if (sdp->type == TYPE_RBC) { | |
631e8a13 AV |
2387 | modepage = 6; |
2388 | dbd = 8; | |
2389 | } else { | |
2390 | modepage = 8; | |
2391 | dbd = 0; | |
2392 | } | |
2393 | ||
1da177e4 | 2394 | /* cautiously ask */ |
0bcaa111 LT |
2395 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, first_len, |
2396 | &data, &sshdr); | |
1da177e4 LT |
2397 | |
2398 | if (!scsi_status_is_good(res)) | |
2399 | goto bad_sense; | |
2400 | ||
6d73c851 AV |
2401 | if (!data.header_length) { |
2402 | modepage = 6; | |
0bcaa111 | 2403 | first_len = 0; |
b2bff6ce MP |
2404 | sd_first_printk(KERN_ERR, sdkp, |
2405 | "Missing header in MODE_SENSE response\n"); | |
6d73c851 AV |
2406 | } |
2407 | ||
1da177e4 LT |
2408 | /* that went OK, now ask for the proper length */ |
2409 | len = data.length; | |
2410 | ||
2411 | /* | |
2412 | * We're only interested in the first three bytes, actually. | |
2413 | * But the data cache page is defined for the first 20. | |
2414 | */ | |
2415 | if (len < 3) | |
2416 | goto bad_sense; | |
0bcaa111 | 2417 | else if (len > SD_BUF_SIZE) { |
b2bff6ce | 2418 | sd_first_printk(KERN_NOTICE, sdkp, "Truncating mode parameter " |
0bcaa111 LT |
2419 | "data from %d to %d bytes\n", len, SD_BUF_SIZE); |
2420 | len = SD_BUF_SIZE; | |
2421 | } | |
2422 | if (modepage == 0x3F && sdp->use_192_bytes_for_3f) | |
2423 | len = 192; | |
1da177e4 LT |
2424 | |
2425 | /* Get the data */ | |
0bcaa111 LT |
2426 | if (len > first_len) |
2427 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, len, | |
2428 | &data, &sshdr); | |
1da177e4 LT |
2429 | |
2430 | if (scsi_status_is_good(res)) { | |
631e8a13 | 2431 | int offset = data.header_length + data.block_descriptor_length; |
1da177e4 | 2432 | |
0bcaa111 LT |
2433 | while (offset < len) { |
2434 | u8 page_code = buffer[offset] & 0x3F; | |
2435 | u8 spf = buffer[offset] & 0x40; | |
2436 | ||
2437 | if (page_code == 8 || page_code == 6) { | |
2438 | /* We're interested only in the first 3 bytes. | |
2439 | */ | |
2440 | if (len - offset <= 2) { | |
b2bff6ce MP |
2441 | sd_first_printk(KERN_ERR, sdkp, |
2442 | "Incomplete mode parameter " | |
2443 | "data\n"); | |
0bcaa111 LT |
2444 | goto defaults; |
2445 | } else { | |
2446 | modepage = page_code; | |
2447 | goto Page_found; | |
2448 | } | |
2449 | } else { | |
2450 | /* Go to the next page */ | |
2451 | if (spf && len - offset > 3) | |
2452 | offset += 4 + (buffer[offset+2] << 8) + | |
2453 | buffer[offset+3]; | |
2454 | else if (!spf && len - offset > 1) | |
2455 | offset += 2 + buffer[offset+1]; | |
2456 | else { | |
b2bff6ce MP |
2457 | sd_first_printk(KERN_ERR, sdkp, |
2458 | "Incomplete mode " | |
2459 | "parameter data\n"); | |
0bcaa111 LT |
2460 | goto defaults; |
2461 | } | |
2462 | } | |
48970800 AV |
2463 | } |
2464 | ||
b2bff6ce | 2465 | sd_first_printk(KERN_ERR, sdkp, "No Caching mode page found\n"); |
984f1733 AS |
2466 | goto defaults; |
2467 | ||
0bcaa111 | 2468 | Page_found: |
631e8a13 AV |
2469 | if (modepage == 8) { |
2470 | sdkp->WCE = ((buffer[offset + 2] & 0x04) != 0); | |
2471 | sdkp->RCD = ((buffer[offset + 2] & 0x01) != 0); | |
2472 | } else { | |
2473 | sdkp->WCE = ((buffer[offset + 2] & 0x01) == 0); | |
2474 | sdkp->RCD = 0; | |
2475 | } | |
1da177e4 | 2476 | |
007365ad | 2477 | sdkp->DPOFUA = (data.device_specific & 0x10) != 0; |
b14bf2d0 AS |
2478 | if (sdp->broken_fua) { |
2479 | sd_first_printk(KERN_NOTICE, sdkp, "Disabling FUA\n"); | |
2480 | sdkp->DPOFUA = 0; | |
2481 | } else if (sdkp->DPOFUA && !sdkp->device->use_10_for_rw) { | |
b2bff6ce | 2482 | sd_first_printk(KERN_NOTICE, sdkp, |
e73aec82 | 2483 | "Uses READ/WRITE(6), disabling FUA\n"); |
007365ad TH |
2484 | sdkp->DPOFUA = 0; |
2485 | } | |
2486 | ||
2eefd57b SRT |
2487 | /* No cache flush allowed for write protected devices */ |
2488 | if (sdkp->WCE && sdkp->write_prot) | |
2489 | sdkp->WCE = 0; | |
2490 | ||
70a9b873 MP |
2491 | if (sdkp->first_scan || old_wce != sdkp->WCE || |
2492 | old_rcd != sdkp->RCD || old_dpofua != sdkp->DPOFUA) | |
2493 | sd_printk(KERN_NOTICE, sdkp, | |
2494 | "Write cache: %s, read cache: %s, %s\n", | |
2495 | sdkp->WCE ? "enabled" : "disabled", | |
2496 | sdkp->RCD ? "disabled" : "enabled", | |
2497 | sdkp->DPOFUA ? "supports DPO and FUA" | |
2498 | : "doesn't support DPO or FUA"); | |
1da177e4 LT |
2499 | |
2500 | return; | |
2501 | } | |
2502 | ||
2503 | bad_sense: | |
ea73a9f2 | 2504 | if (scsi_sense_valid(&sshdr) && |
1da177e4 LT |
2505 | sshdr.sense_key == ILLEGAL_REQUEST && |
2506 | sshdr.asc == 0x24 && sshdr.ascq == 0x0) | |
e73aec82 | 2507 | /* Invalid field in CDB */ |
b2bff6ce | 2508 | sd_first_printk(KERN_NOTICE, sdkp, "Cache data unavailable\n"); |
1da177e4 | 2509 | else |
b2bff6ce MP |
2510 | sd_first_printk(KERN_ERR, sdkp, |
2511 | "Asking for cache data failed\n"); | |
1da177e4 LT |
2512 | |
2513 | defaults: | |
b81478d8 | 2514 | if (sdp->wce_default_on) { |
b2bff6ce MP |
2515 | sd_first_printk(KERN_NOTICE, sdkp, |
2516 | "Assuming drive cache: write back\n"); | |
b81478d8 NJ |
2517 | sdkp->WCE = 1; |
2518 | } else { | |
b2bff6ce MP |
2519 | sd_first_printk(KERN_ERR, sdkp, |
2520 | "Assuming drive cache: write through\n"); | |
b81478d8 NJ |
2521 | sdkp->WCE = 0; |
2522 | } | |
1da177e4 | 2523 | sdkp->RCD = 0; |
48970800 | 2524 | sdkp->DPOFUA = 0; |
1da177e4 LT |
2525 | } |
2526 | ||
e0597d70 MP |
2527 | /* |
2528 | * The ATO bit indicates whether the DIF application tag is available | |
2529 | * for use by the operating system. | |
2530 | */ | |
439d77f7 | 2531 | static void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer) |
e0597d70 MP |
2532 | { |
2533 | int res, offset; | |
2534 | struct scsi_device *sdp = sdkp->device; | |
2535 | struct scsi_mode_data data; | |
2536 | struct scsi_sense_hdr sshdr; | |
2537 | ||
2538 | if (sdp->type != TYPE_DISK) | |
2539 | return; | |
2540 | ||
2541 | if (sdkp->protection_type == 0) | |
2542 | return; | |
2543 | ||
2544 | res = scsi_mode_sense(sdp, 1, 0x0a, buffer, 36, SD_TIMEOUT, | |
2545 | SD_MAX_RETRIES, &data, &sshdr); | |
2546 | ||
2547 | if (!scsi_status_is_good(res) || !data.header_length || | |
2548 | data.length < 6) { | |
b2bff6ce | 2549 | sd_first_printk(KERN_WARNING, sdkp, |
e0597d70 MP |
2550 | "getting Control mode page failed, assume no ATO\n"); |
2551 | ||
2552 | if (scsi_sense_valid(&sshdr)) | |
2553 | sd_print_sense_hdr(sdkp, &sshdr); | |
2554 | ||
2555 | return; | |
2556 | } | |
2557 | ||
2558 | offset = data.header_length + data.block_descriptor_length; | |
2559 | ||
2560 | if ((buffer[offset] & 0x3f) != 0x0a) { | |
b2bff6ce | 2561 | sd_first_printk(KERN_ERR, sdkp, "ATO Got wrong page\n"); |
e0597d70 MP |
2562 | return; |
2563 | } | |
2564 | ||
2565 | if ((buffer[offset + 5] & 0x80) == 0) | |
2566 | return; | |
2567 | ||
2568 | sdkp->ATO = 1; | |
2569 | ||
2570 | return; | |
2571 | } | |
2572 | ||
d11b6916 MP |
2573 | /** |
2574 | * sd_read_block_limits - Query disk device for preferred I/O sizes. | |
2575 | * @disk: disk to query | |
2576 | */ | |
2577 | static void sd_read_block_limits(struct scsi_disk *sdkp) | |
2578 | { | |
2579 | unsigned int sector_sz = sdkp->device->sector_size; | |
bb2d3de1 | 2580 | const int vpd_len = 64; |
bcdb247c | 2581 | u32 max_xfer_length; |
e3deec09 | 2582 | unsigned char *buffer = kmalloc(vpd_len, GFP_KERNEL); |
d11b6916 | 2583 | |
e3deec09 JB |
2584 | if (!buffer || |
2585 | /* Block Limits VPD */ | |
2586 | scsi_get_vpd_page(sdkp->device, 0xb0, buffer, vpd_len)) | |
2587 | goto out; | |
d11b6916 | 2588 | |
bcdb247c MP |
2589 | max_xfer_length = get_unaligned_be32(&buffer[8]); |
2590 | if (max_xfer_length) | |
2591 | sdkp->max_xfer_blocks = max_xfer_length; | |
2592 | ||
d11b6916 MP |
2593 | blk_queue_io_min(sdkp->disk->queue, |
2594 | get_unaligned_be16(&buffer[6]) * sector_sz); | |
2595 | blk_queue_io_opt(sdkp->disk->queue, | |
2596 | get_unaligned_be32(&buffer[12]) * sector_sz); | |
2597 | ||
c98a0eb0 MP |
2598 | if (buffer[3] == 0x3c) { |
2599 | unsigned int lba_count, desc_count; | |
e339c1a7 | 2600 | |
5db44863 | 2601 | sdkp->max_ws_blocks = (u32)get_unaligned_be64(&buffer[36]); |
e339c1a7 | 2602 | |
c98a0eb0 | 2603 | if (!sdkp->lbpme) |
045d3fe7 | 2604 | goto out; |
045d3fe7 | 2605 | |
c98a0eb0 MP |
2606 | lba_count = get_unaligned_be32(&buffer[20]); |
2607 | desc_count = get_unaligned_be32(&buffer[24]); | |
045d3fe7 | 2608 | |
c98a0eb0 MP |
2609 | if (lba_count && desc_count) |
2610 | sdkp->max_unmap_blocks = lba_count; | |
e339c1a7 | 2611 | |
c98a0eb0 | 2612 | sdkp->unmap_granularity = get_unaligned_be32(&buffer[28]); |
e339c1a7 MP |
2613 | |
2614 | if (buffer[32] & 0x80) | |
c98a0eb0 | 2615 | sdkp->unmap_alignment = |
e339c1a7 | 2616 | get_unaligned_be32(&buffer[32]) & ~(1 << 31); |
c98a0eb0 MP |
2617 | |
2618 | if (!sdkp->lbpvpd) { /* LBP VPD page not provided */ | |
2619 | ||
2620 | if (sdkp->max_unmap_blocks) | |
2621 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
2622 | else | |
2623 | sd_config_discard(sdkp, SD_LBP_WS16); | |
2624 | ||
2625 | } else { /* LBP VPD page tells us what to use */ | |
e461338b MP |
2626 | if (sdkp->lbpu && sdkp->max_unmap_blocks && !sdkp->lbprz) |
2627 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
2628 | else if (sdkp->lbpws) | |
c98a0eb0 MP |
2629 | sd_config_discard(sdkp, SD_LBP_WS16); |
2630 | else if (sdkp->lbpws10) | |
2631 | sd_config_discard(sdkp, SD_LBP_WS10); | |
7985090a MP |
2632 | else if (sdkp->lbpu && sdkp->max_unmap_blocks) |
2633 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
c98a0eb0 MP |
2634 | else |
2635 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
2636 | } | |
e339c1a7 MP |
2637 | } |
2638 | ||
e3deec09 | 2639 | out: |
d11b6916 MP |
2640 | kfree(buffer); |
2641 | } | |
2642 | ||
3821d768 MP |
2643 | /** |
2644 | * sd_read_block_characteristics - Query block dev. characteristics | |
2645 | * @disk: disk to query | |
2646 | */ | |
2647 | static void sd_read_block_characteristics(struct scsi_disk *sdkp) | |
2648 | { | |
e3deec09 | 2649 | unsigned char *buffer; |
3821d768 | 2650 | u16 rot; |
bb2d3de1 | 2651 | const int vpd_len = 64; |
3821d768 | 2652 | |
e3deec09 | 2653 | buffer = kmalloc(vpd_len, GFP_KERNEL); |
3821d768 | 2654 | |
e3deec09 JB |
2655 | if (!buffer || |
2656 | /* Block Device Characteristics VPD */ | |
2657 | scsi_get_vpd_page(sdkp->device, 0xb1, buffer, vpd_len)) | |
2658 | goto out; | |
3821d768 MP |
2659 | |
2660 | rot = get_unaligned_be16(&buffer[4]); | |
2661 | ||
b277da0a | 2662 | if (rot == 1) { |
3821d768 | 2663 | queue_flag_set_unlocked(QUEUE_FLAG_NONROT, sdkp->disk->queue); |
b277da0a MS |
2664 | queue_flag_clear_unlocked(QUEUE_FLAG_ADD_RANDOM, sdkp->disk->queue); |
2665 | } | |
3821d768 | 2666 | |
e3deec09 | 2667 | out: |
3821d768 MP |
2668 | kfree(buffer); |
2669 | } | |
2670 | ||
045d3fe7 | 2671 | /** |
c98a0eb0 | 2672 | * sd_read_block_provisioning - Query provisioning VPD page |
045d3fe7 MP |
2673 | * @disk: disk to query |
2674 | */ | |
c98a0eb0 | 2675 | static void sd_read_block_provisioning(struct scsi_disk *sdkp) |
045d3fe7 MP |
2676 | { |
2677 | unsigned char *buffer; | |
2678 | const int vpd_len = 8; | |
2679 | ||
c98a0eb0 | 2680 | if (sdkp->lbpme == 0) |
045d3fe7 MP |
2681 | return; |
2682 | ||
2683 | buffer = kmalloc(vpd_len, GFP_KERNEL); | |
2684 | ||
2685 | if (!buffer || scsi_get_vpd_page(sdkp->device, 0xb2, buffer, vpd_len)) | |
2686 | goto out; | |
2687 | ||
c98a0eb0 MP |
2688 | sdkp->lbpvpd = 1; |
2689 | sdkp->lbpu = (buffer[5] >> 7) & 1; /* UNMAP */ | |
2690 | sdkp->lbpws = (buffer[5] >> 6) & 1; /* WRITE SAME(16) with UNMAP */ | |
2691 | sdkp->lbpws10 = (buffer[5] >> 5) & 1; /* WRITE SAME(10) with UNMAP */ | |
045d3fe7 MP |
2692 | |
2693 | out: | |
2694 | kfree(buffer); | |
2695 | } | |
2696 | ||
5db44863 MP |
2697 | static void sd_read_write_same(struct scsi_disk *sdkp, unsigned char *buffer) |
2698 | { | |
66c28f97 MP |
2699 | struct scsi_device *sdev = sdkp->device; |
2700 | ||
54b2b50c MP |
2701 | if (sdev->host->no_write_same) { |
2702 | sdev->no_write_same = 1; | |
2703 | ||
2704 | return; | |
2705 | } | |
2706 | ||
66c28f97 | 2707 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, INQUIRY) < 0) { |
af73623f BS |
2708 | /* too large values might cause issues with arcmsr */ |
2709 | int vpd_buf_len = 64; | |
2710 | ||
66c28f97 MP |
2711 | sdev->no_report_opcodes = 1; |
2712 | ||
2713 | /* Disable WRITE SAME if REPORT SUPPORTED OPERATION | |
2714 | * CODES is unsupported and the device has an ATA | |
2715 | * Information VPD page (SAT). | |
2716 | */ | |
af73623f | 2717 | if (!scsi_get_vpd_page(sdev, 0x89, buffer, vpd_buf_len)) |
66c28f97 MP |
2718 | sdev->no_write_same = 1; |
2719 | } | |
2720 | ||
2721 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME_16) == 1) | |
5db44863 | 2722 | sdkp->ws16 = 1; |
66c28f97 MP |
2723 | |
2724 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME) == 1) | |
2725 | sdkp->ws10 = 1; | |
5db44863 MP |
2726 | } |
2727 | ||
ffd4bc2a MP |
2728 | static int sd_try_extended_inquiry(struct scsi_device *sdp) |
2729 | { | |
c1d40a52 MP |
2730 | /* Attempt VPD inquiry if the device blacklist explicitly calls |
2731 | * for it. | |
2732 | */ | |
2733 | if (sdp->try_vpd_pages) | |
2734 | return 1; | |
ffd4bc2a MP |
2735 | /* |
2736 | * Although VPD inquiries can go to SCSI-2 type devices, | |
2737 | * some USB ones crash on receiving them, and the pages | |
2738 | * we currently ask for are for SPC-3 and beyond | |
2739 | */ | |
09b6b51b | 2740 | if (sdp->scsi_level > SCSI_SPC_2 && !sdp->skip_vpd_pages) |
ffd4bc2a MP |
2741 | return 1; |
2742 | return 0; | |
2743 | } | |
2744 | ||
1da177e4 LT |
2745 | /** |
2746 | * sd_revalidate_disk - called the first time a new disk is seen, | |
2747 | * performs disk spin up, read_capacity, etc. | |
2748 | * @disk: struct gendisk we care about | |
2749 | **/ | |
2750 | static int sd_revalidate_disk(struct gendisk *disk) | |
2751 | { | |
2752 | struct scsi_disk *sdkp = scsi_disk(disk); | |
2753 | struct scsi_device *sdp = sdkp->device; | |
1da177e4 | 2754 | unsigned char *buffer; |
bcdb247c | 2755 | unsigned int max_xfer; |
1da177e4 | 2756 | |
fa0d34be MP |
2757 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, |
2758 | "sd_revalidate_disk\n")); | |
1da177e4 LT |
2759 | |
2760 | /* | |
2761 | * If the device is offline, don't try and read capacity or any | |
2762 | * of the other niceties. | |
2763 | */ | |
2764 | if (!scsi_device_online(sdp)) | |
2765 | goto out; | |
2766 | ||
a6123f14 | 2767 | buffer = kmalloc(SD_BUF_SIZE, GFP_KERNEL); |
1da177e4 | 2768 | if (!buffer) { |
e73aec82 MP |
2769 | sd_printk(KERN_WARNING, sdkp, "sd_revalidate_disk: Memory " |
2770 | "allocation failure.\n"); | |
ea73a9f2 | 2771 | goto out; |
1da177e4 LT |
2772 | } |
2773 | ||
e73aec82 | 2774 | sd_spinup_disk(sdkp); |
1da177e4 LT |
2775 | |
2776 | /* | |
2777 | * Without media there is no reason to ask; moreover, some devices | |
2778 | * react badly if we do. | |
2779 | */ | |
2780 | if (sdkp->media_present) { | |
e73aec82 | 2781 | sd_read_capacity(sdkp, buffer); |
ffd4bc2a MP |
2782 | |
2783 | if (sd_try_extended_inquiry(sdp)) { | |
c98a0eb0 | 2784 | sd_read_block_provisioning(sdkp); |
ffd4bc2a MP |
2785 | sd_read_block_limits(sdkp); |
2786 | sd_read_block_characteristics(sdkp); | |
2787 | } | |
2788 | ||
e73aec82 MP |
2789 | sd_read_write_protect_flag(sdkp, buffer); |
2790 | sd_read_cache_type(sdkp, buffer); | |
e0597d70 | 2791 | sd_read_app_tag_own(sdkp, buffer); |
5db44863 | 2792 | sd_read_write_same(sdkp, buffer); |
1da177e4 | 2793 | } |
461d4e90 | 2794 | |
70a9b873 MP |
2795 | sdkp->first_scan = 0; |
2796 | ||
461d4e90 TH |
2797 | /* |
2798 | * We now have all cache related info, determine how we deal | |
4913efe4 | 2799 | * with flush requests. |
461d4e90 | 2800 | */ |
cb2fb68d | 2801 | sd_set_flush_flag(sdkp); |
461d4e90 | 2802 | |
3a9794d3 | 2803 | max_xfer = sdkp->max_xfer_blocks; |
bcdb247c | 2804 | max_xfer <<= ilog2(sdp->sector_size) - 9; |
3a9794d3 BK |
2805 | |
2806 | max_xfer = min_not_zero(queue_max_hw_sectors(sdkp->disk->queue), | |
2807 | max_xfer); | |
bcdb247c | 2808 | blk_queue_max_hw_sectors(sdkp->disk->queue, max_xfer); |
1da177e4 | 2809 | set_capacity(disk, sdkp->capacity); |
5db44863 | 2810 | sd_config_write_same(sdkp); |
1da177e4 LT |
2811 | kfree(buffer); |
2812 | ||
1da177e4 LT |
2813 | out: |
2814 | return 0; | |
2815 | } | |
2816 | ||
72ec24bd TH |
2817 | /** |
2818 | * sd_unlock_native_capacity - unlock native capacity | |
2819 | * @disk: struct gendisk to set capacity for | |
2820 | * | |
2821 | * Block layer calls this function if it detects that partitions | |
2822 | * on @disk reach beyond the end of the device. If the SCSI host | |
2823 | * implements ->unlock_native_capacity() method, it's invoked to | |
2824 | * give it a chance to adjust the device capacity. | |
2825 | * | |
2826 | * CONTEXT: | |
2827 | * Defined by block layer. Might sleep. | |
2828 | */ | |
2829 | static void sd_unlock_native_capacity(struct gendisk *disk) | |
2830 | { | |
2831 | struct scsi_device *sdev = scsi_disk(disk)->device; | |
2832 | ||
2833 | if (sdev->host->hostt->unlock_native_capacity) | |
2834 | sdev->host->hostt->unlock_native_capacity(sdev); | |
2835 | } | |
2836 | ||
3e1a7ff8 TH |
2837 | /** |
2838 | * sd_format_disk_name - format disk name | |
2839 | * @prefix: name prefix - ie. "sd" for SCSI disks | |
2840 | * @index: index of the disk to format name for | |
2841 | * @buf: output buffer | |
2842 | * @buflen: length of the output buffer | |
2843 | * | |
2844 | * SCSI disk names starts at sda. The 26th device is sdz and the | |
2845 | * 27th is sdaa. The last one for two lettered suffix is sdzz | |
2846 | * which is followed by sdaaa. | |
2847 | * | |
2848 | * This is basically 26 base counting with one extra 'nil' entry | |
3ad2f3fb | 2849 | * at the beginning from the second digit on and can be |
3e1a7ff8 TH |
2850 | * determined using similar method as 26 base conversion with the |
2851 | * index shifted -1 after each digit is computed. | |
2852 | * | |
2853 | * CONTEXT: | |
2854 | * Don't care. | |
2855 | * | |
2856 | * RETURNS: | |
2857 | * 0 on success, -errno on failure. | |
2858 | */ | |
2859 | static int sd_format_disk_name(char *prefix, int index, char *buf, int buflen) | |
2860 | { | |
2861 | const int base = 'z' - 'a' + 1; | |
2862 | char *begin = buf + strlen(prefix); | |
2863 | char *end = buf + buflen; | |
2864 | char *p; | |
2865 | int unit; | |
2866 | ||
2867 | p = end - 1; | |
2868 | *p = '\0'; | |
2869 | unit = base; | |
2870 | do { | |
2871 | if (p == begin) | |
2872 | return -EINVAL; | |
2873 | *--p = 'a' + (index % unit); | |
2874 | index = (index / unit) - 1; | |
2875 | } while (index >= 0); | |
2876 | ||
2877 | memmove(begin, p, end - p); | |
2878 | memcpy(buf, prefix, strlen(prefix)); | |
2879 | ||
2880 | return 0; | |
2881 | } | |
2882 | ||
4ace92fc AV |
2883 | /* |
2884 | * The asynchronous part of sd_probe | |
2885 | */ | |
2886 | static void sd_probe_async(void *data, async_cookie_t cookie) | |
2887 | { | |
2888 | struct scsi_disk *sdkp = data; | |
2889 | struct scsi_device *sdp; | |
2890 | struct gendisk *gd; | |
2891 | u32 index; | |
2892 | struct device *dev; | |
2893 | ||
2894 | sdp = sdkp->device; | |
2895 | gd = sdkp->disk; | |
2896 | index = sdkp->index; | |
2897 | dev = &sdp->sdev_gendev; | |
2898 | ||
1a03ae0f MR |
2899 | gd->major = sd_major((index & 0xf0) >> 4); |
2900 | gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00); | |
2901 | gd->minors = SD_MINORS; | |
2902 | ||
4ace92fc AV |
2903 | gd->fops = &sd_fops; |
2904 | gd->private_data = &sdkp->driver; | |
2905 | gd->queue = sdkp->device->request_queue; | |
2906 | ||
70a9b873 MP |
2907 | /* defaults, until the device tells us otherwise */ |
2908 | sdp->sector_size = 512; | |
2909 | sdkp->capacity = 0; | |
2910 | sdkp->media_present = 1; | |
2911 | sdkp->write_prot = 0; | |
39c60a09 | 2912 | sdkp->cache_override = 0; |
70a9b873 MP |
2913 | sdkp->WCE = 0; |
2914 | sdkp->RCD = 0; | |
2915 | sdkp->ATO = 0; | |
2916 | sdkp->first_scan = 1; | |
18a4d0a2 | 2917 | sdkp->max_medium_access_timeouts = SD_MAX_MEDIUM_TIMEOUTS; |
70a9b873 | 2918 | |
4ace92fc AV |
2919 | sd_revalidate_disk(gd); |
2920 | ||
4ace92fc | 2921 | gd->driverfs_dev = &sdp->sdev_gendev; |
97fedbbe | 2922 | gd->flags = GENHD_FL_EXT_DEVT; |
2bae0093 | 2923 | if (sdp->removable) { |
4ace92fc | 2924 | gd->flags |= GENHD_FL_REMOVABLE; |
2bae0093 TH |
2925 | gd->events |= DISK_EVENT_MEDIA_CHANGE; |
2926 | } | |
4ace92fc | 2927 | |
10c580e4 | 2928 | blk_pm_runtime_init(sdp->request_queue, dev); |
4ace92fc | 2929 | add_disk(gd); |
fe542396 MP |
2930 | if (sdkp->capacity) |
2931 | sd_dif_config_host(sdkp); | |
4ace92fc | 2932 | |
3821d768 MP |
2933 | sd_revalidate_disk(gd); |
2934 | ||
4ace92fc AV |
2935 | sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n", |
2936 | sdp->removable ? "removable " : ""); | |
478a8a05 | 2937 | scsi_autopm_put_device(sdp); |
ea038f63 | 2938 | put_device(&sdkp->dev); |
4ace92fc AV |
2939 | } |
2940 | ||
1da177e4 LT |
2941 | /** |
2942 | * sd_probe - called during driver initialization and whenever a | |
2943 | * new scsi device is attached to the system. It is called once | |
2944 | * for each scsi device (not just disks) present. | |
2945 | * @dev: pointer to device object | |
2946 | * | |
2947 | * Returns 0 if successful (or not interested in this scsi device | |
2948 | * (e.g. scanner)); 1 when there is an error. | |
2949 | * | |
2950 | * Note: this function is invoked from the scsi mid-level. | |
2951 | * This function sets up the mapping between a given | |
2952 | * <host,channel,id,lun> (found in sdp) and new device name | |
2953 | * (e.g. /dev/sda). More precisely it is the block device major | |
2954 | * and minor number that is chosen here. | |
2955 | * | |
2db93ce8 PU |
2956 | * Assume sd_probe is not re-entrant (for time being) |
2957 | * Also think about sd_probe() and sd_remove() running coincidentally. | |
1da177e4 LT |
2958 | **/ |
2959 | static int sd_probe(struct device *dev) | |
2960 | { | |
2961 | struct scsi_device *sdp = to_scsi_device(dev); | |
2962 | struct scsi_disk *sdkp; | |
2963 | struct gendisk *gd; | |
439d77f7 | 2964 | int index; |
1da177e4 LT |
2965 | int error; |
2966 | ||
6fe8c1db | 2967 | scsi_autopm_get_device(sdp); |
1da177e4 | 2968 | error = -ENODEV; |
631e8a13 | 2969 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_MOD && sdp->type != TYPE_RBC) |
1da177e4 LT |
2970 | goto out; |
2971 | ||
9ccfc756 | 2972 | SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO, sdp, |
2db93ce8 | 2973 | "sd_probe\n")); |
1da177e4 LT |
2974 | |
2975 | error = -ENOMEM; | |
24669f75 | 2976 | sdkp = kzalloc(sizeof(*sdkp), GFP_KERNEL); |
1da177e4 LT |
2977 | if (!sdkp) |
2978 | goto out; | |
2979 | ||
689d6fac | 2980 | gd = alloc_disk(SD_MINORS); |
1da177e4 LT |
2981 | if (!gd) |
2982 | goto out_free; | |
2983 | ||
f27bac27 TH |
2984 | do { |
2985 | if (!ida_pre_get(&sd_index_ida, GFP_KERNEL)) | |
2986 | goto out_put; | |
1da177e4 | 2987 | |
4034cc68 | 2988 | spin_lock(&sd_index_lock); |
f27bac27 | 2989 | error = ida_get_new(&sd_index_ida, &index); |
4034cc68 | 2990 | spin_unlock(&sd_index_lock); |
f27bac27 | 2991 | } while (error == -EAGAIN); |
1da177e4 | 2992 | |
21208ae5 DK |
2993 | if (error) { |
2994 | sdev_printk(KERN_WARNING, sdp, "sd_probe: memory exhausted.\n"); | |
1da177e4 | 2995 | goto out_put; |
1a03ae0f MR |
2996 | } |
2997 | ||
3e1a7ff8 | 2998 | error = sd_format_disk_name("sd", index, gd->disk_name, DISK_NAME_LEN); |
21208ae5 DK |
2999 | if (error) { |
3000 | sdev_printk(KERN_WARNING, sdp, "SCSI disk (sd) name length exceeded.\n"); | |
f27bac27 | 3001 | goto out_free_index; |
21208ae5 | 3002 | } |
f27bac27 | 3003 | |
1da177e4 LT |
3004 | sdkp->device = sdp; |
3005 | sdkp->driver = &sd_template; | |
3006 | sdkp->disk = gd; | |
3007 | sdkp->index = index; | |
409f3499 | 3008 | atomic_set(&sdkp->openers, 0); |
9e1a1537 | 3009 | atomic_set(&sdkp->device->ioerr_cnt, 0); |
1da177e4 | 3010 | |
601e7638 JB |
3011 | if (!sdp->request_queue->rq_timeout) { |
3012 | if (sdp->type != TYPE_MOD) | |
3013 | blk_queue_rq_timeout(sdp->request_queue, SD_TIMEOUT); | |
3014 | else | |
3015 | blk_queue_rq_timeout(sdp->request_queue, | |
3016 | SD_MOD_TIMEOUT); | |
3017 | } | |
3018 | ||
3019 | device_initialize(&sdkp->dev); | |
478a8a05 | 3020 | sdkp->dev.parent = dev; |
601e7638 | 3021 | sdkp->dev.class = &sd_disk_class; |
02aa2a37 | 3022 | dev_set_name(&sdkp->dev, "%s", dev_name(dev)); |
601e7638 JB |
3023 | |
3024 | if (device_add(&sdkp->dev)) | |
3025 | goto out_free_index; | |
3026 | ||
478a8a05 AS |
3027 | get_device(dev); |
3028 | dev_set_drvdata(dev, sdkp); | |
601e7638 | 3029 | |
ea038f63 | 3030 | get_device(&sdkp->dev); /* prevent release before async_schedule */ |
a7a20d10 | 3031 | async_schedule_domain(sd_probe_async, sdkp, &scsi_sd_probe_domain); |
1da177e4 LT |
3032 | |
3033 | return 0; | |
3034 | ||
f27bac27 | 3035 | out_free_index: |
4034cc68 | 3036 | spin_lock(&sd_index_lock); |
f27bac27 | 3037 | ida_remove(&sd_index_ida, index); |
4034cc68 | 3038 | spin_unlock(&sd_index_lock); |
6bdaa1f1 | 3039 | out_put: |
1da177e4 | 3040 | put_disk(gd); |
6bdaa1f1 | 3041 | out_free: |
1da177e4 | 3042 | kfree(sdkp); |
6bdaa1f1 | 3043 | out: |
6fe8c1db | 3044 | scsi_autopm_put_device(sdp); |
1da177e4 LT |
3045 | return error; |
3046 | } | |
3047 | ||
3048 | /** | |
3049 | * sd_remove - called whenever a scsi disk (previously recognized by | |
3050 | * sd_probe) is detached from the system. It is called (potentially | |
3051 | * multiple times) during sd module unload. | |
3052 | * @sdp: pointer to mid level scsi device object | |
3053 | * | |
3054 | * Note: this function is invoked from the scsi mid-level. | |
3055 | * This function potentially frees up a device name (e.g. /dev/sdc) | |
3056 | * that could be re-used by a subsequent sd_probe(). | |
3057 | * This function is not called when the built-in sd driver is "exit-ed". | |
3058 | **/ | |
3059 | static int sd_remove(struct device *dev) | |
3060 | { | |
601e7638 | 3061 | struct scsi_disk *sdkp; |
0761df9c | 3062 | dev_t devt; |
1da177e4 | 3063 | |
601e7638 | 3064 | sdkp = dev_get_drvdata(dev); |
0761df9c | 3065 | devt = disk_devt(sdkp->disk); |
478a8a05 AS |
3066 | scsi_autopm_get_device(sdkp->device); |
3067 | ||
3c31b52f | 3068 | async_synchronize_full_domain(&scsi_sd_pm_domain); |
a7a20d10 | 3069 | async_synchronize_full_domain(&scsi_sd_probe_domain); |
ee959b00 | 3070 | device_del(&sdkp->dev); |
1da177e4 LT |
3071 | del_gendisk(sdkp->disk); |
3072 | sd_shutdown(dev); | |
39b7f1e2 | 3073 | |
0761df9c HR |
3074 | blk_register_region(devt, SD_MINORS, NULL, |
3075 | sd_default_probe, NULL, NULL); | |
3076 | ||
0b950672 | 3077 | mutex_lock(&sd_ref_mutex); |
39b7f1e2 | 3078 | dev_set_drvdata(dev, NULL); |
ee959b00 | 3079 | put_device(&sdkp->dev); |
0b950672 | 3080 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
3081 | |
3082 | return 0; | |
3083 | } | |
3084 | ||
3085 | /** | |
3086 | * scsi_disk_release - Called to free the scsi_disk structure | |
ee959b00 | 3087 | * @dev: pointer to embedded class device |
1da177e4 | 3088 | * |
0b950672 | 3089 | * sd_ref_mutex must be held entering this routine. Because it is |
1da177e4 LT |
3090 | * called on last put, you should always use the scsi_disk_get() |
3091 | * scsi_disk_put() helpers which manipulate the semaphore directly | |
ee959b00 | 3092 | * and never do a direct put_device. |
1da177e4 | 3093 | **/ |
ee959b00 | 3094 | static void scsi_disk_release(struct device *dev) |
1da177e4 | 3095 | { |
ee959b00 | 3096 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
1da177e4 LT |
3097 | struct gendisk *disk = sdkp->disk; |
3098 | ||
4034cc68 | 3099 | spin_lock(&sd_index_lock); |
f27bac27 | 3100 | ida_remove(&sd_index_ida, sdkp->index); |
4034cc68 | 3101 | spin_unlock(&sd_index_lock); |
1da177e4 LT |
3102 | |
3103 | disk->private_data = NULL; | |
1da177e4 | 3104 | put_disk(disk); |
39b7f1e2 | 3105 | put_device(&sdkp->device->sdev_gendev); |
1da177e4 LT |
3106 | |
3107 | kfree(sdkp); | |
3108 | } | |
3109 | ||
cc5d2c8c | 3110 | static int sd_start_stop_device(struct scsi_disk *sdkp, int start) |
c3c94c5a TH |
3111 | { |
3112 | unsigned char cmd[6] = { START_STOP }; /* START_VALID */ | |
3113 | struct scsi_sense_hdr sshdr; | |
cc5d2c8c | 3114 | struct scsi_device *sdp = sdkp->device; |
c3c94c5a TH |
3115 | int res; |
3116 | ||
3117 | if (start) | |
3118 | cmd[4] |= 1; /* START */ | |
3119 | ||
d2886ea3 SR |
3120 | if (sdp->start_stop_pwr_cond) |
3121 | cmd[4] |= start ? 1 << 4 : 3 << 4; /* Active or Standby */ | |
3122 | ||
c3c94c5a TH |
3123 | if (!scsi_device_online(sdp)) |
3124 | return -ENODEV; | |
3125 | ||
9b21493c LM |
3126 | res = scsi_execute_req_flags(sdp, cmd, DMA_NONE, NULL, 0, &sshdr, |
3127 | SD_TIMEOUT, SD_MAX_RETRIES, NULL, REQ_PM); | |
c3c94c5a | 3128 | if (res) { |
ef61329d | 3129 | sd_print_result(sdkp, "Start/Stop Unit failed", res); |
c3c94c5a | 3130 | if (driver_byte(res) & DRIVER_SENSE) |
cc5d2c8c | 3131 | sd_print_sense_hdr(sdkp, &sshdr); |
95897910 ON |
3132 | if (scsi_sense_valid(&sshdr) && |
3133 | /* 0x3a is medium not present */ | |
3134 | sshdr.asc == 0x3a) | |
3135 | res = 0; | |
c3c94c5a TH |
3136 | } |
3137 | ||
95897910 ON |
3138 | /* SCSI error codes must not go to the generic layer */ |
3139 | if (res) | |
3140 | return -EIO; | |
3141 | ||
3142 | return 0; | |
c3c94c5a TH |
3143 | } |
3144 | ||
1da177e4 LT |
3145 | /* |
3146 | * Send a SYNCHRONIZE CACHE instruction down to the device through | |
3147 | * the normal SCSI command structure. Wait for the command to | |
3148 | * complete. | |
3149 | */ | |
3150 | static void sd_shutdown(struct device *dev) | |
3151 | { | |
39b7f1e2 | 3152 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
1da177e4 LT |
3153 | |
3154 | if (!sdkp) | |
3155 | return; /* this can happen */ | |
3156 | ||
54f57588 LM |
3157 | if (pm_runtime_suspended(dev)) |
3158 | goto exit; | |
3159 | ||
95897910 | 3160 | if (sdkp->WCE && sdkp->media_present) { |
e73aec82 MP |
3161 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
3162 | sd_sync_cache(sdkp); | |
39b7f1e2 | 3163 | } |
c3c94c5a | 3164 | |
cc5d2c8c JB |
3165 | if (system_state != SYSTEM_RESTART && sdkp->device->manage_start_stop) { |
3166 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); | |
3167 | sd_start_stop_device(sdkp, 0); | |
c3c94c5a TH |
3168 | } |
3169 | ||
54f57588 | 3170 | exit: |
39b7f1e2 AS |
3171 | scsi_disk_put(sdkp); |
3172 | } | |
1da177e4 | 3173 | |
95897910 | 3174 | static int sd_suspend_common(struct device *dev, bool ignore_stop_errors) |
c3c94c5a | 3175 | { |
c3c94c5a | 3176 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
09ff92fe | 3177 | int ret = 0; |
c3c94c5a TH |
3178 | |
3179 | if (!sdkp) | |
3180 | return 0; /* this can happen */ | |
3181 | ||
95897910 | 3182 | if (sdkp->WCE && sdkp->media_present) { |
cc5d2c8c | 3183 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
c3c94c5a | 3184 | ret = sd_sync_cache(sdkp); |
95897910 ON |
3185 | if (ret) { |
3186 | /* ignore OFFLINE device */ | |
3187 | if (ret == -ENODEV) | |
3188 | ret = 0; | |
09ff92fe | 3189 | goto done; |
95897910 | 3190 | } |
c3c94c5a TH |
3191 | } |
3192 | ||
691e3d31 | 3193 | if (sdkp->device->manage_start_stop) { |
cc5d2c8c | 3194 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); |
95897910 | 3195 | /* an error is not worth aborting a system sleep */ |
cc5d2c8c | 3196 | ret = sd_start_stop_device(sdkp, 0); |
95897910 ON |
3197 | if (ignore_stop_errors) |
3198 | ret = 0; | |
c3c94c5a TH |
3199 | } |
3200 | ||
09ff92fe AS |
3201 | done: |
3202 | scsi_disk_put(sdkp); | |
3203 | return ret; | |
c3c94c5a TH |
3204 | } |
3205 | ||
95897910 ON |
3206 | static int sd_suspend_system(struct device *dev) |
3207 | { | |
3208 | return sd_suspend_common(dev, true); | |
3209 | } | |
3210 | ||
3211 | static int sd_suspend_runtime(struct device *dev) | |
3212 | { | |
3213 | return sd_suspend_common(dev, false); | |
3214 | } | |
3215 | ||
c3c94c5a TH |
3216 | static int sd_resume(struct device *dev) |
3217 | { | |
c3c94c5a | 3218 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
09ff92fe | 3219 | int ret = 0; |
c3c94c5a | 3220 | |
cc5d2c8c | 3221 | if (!sdkp->device->manage_start_stop) |
09ff92fe | 3222 | goto done; |
c3c94c5a | 3223 | |
cc5d2c8c | 3224 | sd_printk(KERN_NOTICE, sdkp, "Starting disk\n"); |
09ff92fe | 3225 | ret = sd_start_stop_device(sdkp, 1); |
c3c94c5a | 3226 | |
09ff92fe AS |
3227 | done: |
3228 | scsi_disk_put(sdkp); | |
3229 | return ret; | |
c3c94c5a TH |
3230 | } |
3231 | ||
1da177e4 LT |
3232 | /** |
3233 | * init_sd - entry point for this driver (both when built in or when | |
3234 | * a module). | |
3235 | * | |
3236 | * Note: this function registers this driver with the scsi mid-level. | |
3237 | **/ | |
3238 | static int __init init_sd(void) | |
3239 | { | |
5e4009ba | 3240 | int majors = 0, i, err; |
1da177e4 LT |
3241 | |
3242 | SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n")); | |
3243 | ||
0761df9c HR |
3244 | for (i = 0; i < SD_MAJORS; i++) { |
3245 | if (register_blkdev(sd_major(i), "sd") != 0) | |
3246 | continue; | |
3247 | majors++; | |
3248 | blk_register_region(sd_major(i), SD_MINORS, NULL, | |
3249 | sd_default_probe, NULL, NULL); | |
3250 | } | |
1da177e4 LT |
3251 | |
3252 | if (!majors) | |
3253 | return -ENODEV; | |
3254 | ||
5e4009ba JG |
3255 | err = class_register(&sd_disk_class); |
3256 | if (err) | |
3257 | goto err_out; | |
6bdaa1f1 | 3258 | |
4e7392ec MP |
3259 | sd_cdb_cache = kmem_cache_create("sd_ext_cdb", SD_EXT_CDB_SIZE, |
3260 | 0, 0, NULL); | |
3261 | if (!sd_cdb_cache) { | |
3262 | printk(KERN_ERR "sd: can't init extended cdb cache\n"); | |
8d964478 | 3263 | err = -ENOMEM; |
4e7392ec MP |
3264 | goto err_out_class; |
3265 | } | |
3266 | ||
3267 | sd_cdb_pool = mempool_create_slab_pool(SD_MEMPOOL_SIZE, sd_cdb_cache); | |
3268 | if (!sd_cdb_pool) { | |
3269 | printk(KERN_ERR "sd: can't init extended cdb pool\n"); | |
8d964478 | 3270 | err = -ENOMEM; |
4e7392ec MP |
3271 | goto err_out_cache; |
3272 | } | |
3273 | ||
afd5e34b JD |
3274 | err = scsi_register_driver(&sd_template.gendrv); |
3275 | if (err) | |
3276 | goto err_out_driver; | |
3277 | ||
5e4009ba JG |
3278 | return 0; |
3279 | ||
afd5e34b JD |
3280 | err_out_driver: |
3281 | mempool_destroy(sd_cdb_pool); | |
3282 | ||
4e7392ec MP |
3283 | err_out_cache: |
3284 | kmem_cache_destroy(sd_cdb_cache); | |
3285 | ||
5e4009ba JG |
3286 | err_out_class: |
3287 | class_unregister(&sd_disk_class); | |
3288 | err_out: | |
3289 | for (i = 0; i < SD_MAJORS; i++) | |
3290 | unregister_blkdev(sd_major(i), "sd"); | |
3291 | return err; | |
1da177e4 LT |
3292 | } |
3293 | ||
3294 | /** | |
3295 | * exit_sd - exit point for this driver (when it is a module). | |
3296 | * | |
3297 | * Note: this function unregisters this driver from the scsi mid-level. | |
3298 | **/ | |
3299 | static void __exit exit_sd(void) | |
3300 | { | |
3301 | int i; | |
3302 | ||
3303 | SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n")); | |
3304 | ||
afd5e34b | 3305 | scsi_unregister_driver(&sd_template.gendrv); |
4e7392ec MP |
3306 | mempool_destroy(sd_cdb_pool); |
3307 | kmem_cache_destroy(sd_cdb_cache); | |
3308 | ||
5e4009ba JG |
3309 | class_unregister(&sd_disk_class); |
3310 | ||
0761df9c HR |
3311 | for (i = 0; i < SD_MAJORS; i++) { |
3312 | blk_unregister_region(sd_major(i), SD_MINORS); | |
1da177e4 | 3313 | unregister_blkdev(sd_major(i), "sd"); |
0761df9c | 3314 | } |
1da177e4 LT |
3315 | } |
3316 | ||
1da177e4 LT |
3317 | module_init(init_sd); |
3318 | module_exit(exit_sd); | |
e73aec82 MP |
3319 | |
3320 | static void sd_print_sense_hdr(struct scsi_disk *sdkp, | |
3321 | struct scsi_sense_hdr *sshdr) | |
3322 | { | |
21045519 HR |
3323 | scsi_print_sense_hdr(sdkp->device, |
3324 | sdkp->disk ? sdkp->disk->disk_name : NULL, sshdr); | |
e73aec82 MP |
3325 | } |
3326 | ||
ef61329d HR |
3327 | static void sd_print_result(const struct scsi_disk *sdkp, const char *msg, |
3328 | int result) | |
e73aec82 | 3329 | { |
ef61329d HR |
3330 | const char *hb_string = scsi_hostbyte_string(result); |
3331 | const char *db_string = scsi_driverbyte_string(result); | |
3332 | ||
3333 | if (hb_string || db_string) | |
3334 | sd_printk(KERN_INFO, sdkp, | |
3335 | "%s: Result: hostbyte=%s driverbyte=%s\n", msg, | |
3336 | hb_string ? hb_string : "invalid", | |
3337 | db_string ? db_string : "invalid"); | |
3338 | else | |
3339 | sd_printk(KERN_INFO, sdkp, | |
3340 | "%s: Result: hostbyte=0x%02x driverbyte=0x%02x\n", | |
3341 | msg, host_byte(result), driver_byte(result)); | |
e73aec82 MP |
3342 | } |
3343 |