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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 *); | |
691e3d31 | 108 | static int sd_suspend(struct device *); |
7b3d9545 LT |
109 | static int sd_resume(struct device *); |
110 | static void sd_rescan(struct device *); | |
111 | static int sd_done(struct scsi_cmnd *); | |
18a4d0a2 | 112 | static int sd_eh_action(struct scsi_cmnd *, unsigned char *, int, int); |
7b3d9545 | 113 | static void sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer); |
ee959b00 | 114 | static void scsi_disk_release(struct device *cdev); |
7b3d9545 LT |
115 | static void sd_print_sense_hdr(struct scsi_disk *, struct scsi_sense_hdr *); |
116 | static void sd_print_result(struct scsi_disk *, int); | |
117 | ||
4034cc68 | 118 | static DEFINE_SPINLOCK(sd_index_lock); |
f27bac27 | 119 | static DEFINE_IDA(sd_index_ida); |
1da177e4 LT |
120 | |
121 | /* This semaphore is used to mediate the 0->1 reference get in the | |
122 | * face of object destruction (i.e. we can't allow a get on an | |
123 | * object after last put) */ | |
0b950672 | 124 | static DEFINE_MUTEX(sd_ref_mutex); |
1da177e4 | 125 | |
439d77f7 HS |
126 | static struct kmem_cache *sd_cdb_cache; |
127 | static mempool_t *sd_cdb_pool; | |
4e7392ec | 128 | |
6bdaa1f1 JB |
129 | static const char *sd_cache_types[] = { |
130 | "write through", "none", "write back", | |
131 | "write back, no read (daft)" | |
132 | }; | |
133 | ||
ee959b00 TJ |
134 | static ssize_t |
135 | sd_store_cache_type(struct device *dev, struct device_attribute *attr, | |
136 | const char *buf, size_t count) | |
6bdaa1f1 JB |
137 | { |
138 | int i, ct = -1, rcd, wce, sp; | |
ee959b00 | 139 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
140 | struct scsi_device *sdp = sdkp->device; |
141 | char buffer[64]; | |
142 | char *buffer_data; | |
143 | struct scsi_mode_data data; | |
144 | struct scsi_sense_hdr sshdr; | |
39c60a09 | 145 | const char *temp = "temporary "; |
6bdaa1f1 JB |
146 | int len; |
147 | ||
148 | if (sdp->type != TYPE_DISK) | |
149 | /* no cache control on RBC devices; theoretically they | |
150 | * can do it, but there's probably so many exceptions | |
151 | * it's not worth the risk */ | |
152 | return -EINVAL; | |
153 | ||
39c60a09 JB |
154 | if (strncmp(buf, temp, sizeof(temp) - 1) == 0) { |
155 | buf += sizeof(temp) - 1; | |
156 | sdkp->cache_override = 1; | |
157 | } else { | |
158 | sdkp->cache_override = 0; | |
159 | } | |
160 | ||
6391a113 | 161 | for (i = 0; i < ARRAY_SIZE(sd_cache_types); i++) { |
439d77f7 | 162 | len = strlen(sd_cache_types[i]); |
6bdaa1f1 JB |
163 | if (strncmp(sd_cache_types[i], buf, len) == 0 && |
164 | buf[len] == '\n') { | |
165 | ct = i; | |
166 | break; | |
167 | } | |
168 | } | |
169 | if (ct < 0) | |
170 | return -EINVAL; | |
171 | rcd = ct & 0x01 ? 1 : 0; | |
172 | wce = ct & 0x02 ? 1 : 0; | |
39c60a09 JB |
173 | |
174 | if (sdkp->cache_override) { | |
175 | sdkp->WCE = wce; | |
176 | sdkp->RCD = rcd; | |
177 | return count; | |
178 | } | |
179 | ||
6bdaa1f1 JB |
180 | if (scsi_mode_sense(sdp, 0x08, 8, buffer, sizeof(buffer), SD_TIMEOUT, |
181 | SD_MAX_RETRIES, &data, NULL)) | |
182 | return -EINVAL; | |
a9312fb8 | 183 | len = min_t(size_t, sizeof(buffer), data.length - data.header_length - |
6bdaa1f1 JB |
184 | data.block_descriptor_length); |
185 | buffer_data = buffer + data.header_length + | |
186 | data.block_descriptor_length; | |
187 | buffer_data[2] &= ~0x05; | |
188 | buffer_data[2] |= wce << 2 | rcd; | |
189 | sp = buffer_data[0] & 0x80 ? 1 : 0; | |
190 | ||
191 | if (scsi_mode_select(sdp, 1, sp, 8, buffer_data, len, SD_TIMEOUT, | |
192 | SD_MAX_RETRIES, &data, &sshdr)) { | |
193 | if (scsi_sense_valid(&sshdr)) | |
e73aec82 | 194 | sd_print_sense_hdr(sdkp, &sshdr); |
6bdaa1f1 JB |
195 | return -EINVAL; |
196 | } | |
f98a8cae | 197 | revalidate_disk(sdkp->disk); |
6bdaa1f1 JB |
198 | return count; |
199 | } | |
200 | ||
ee959b00 TJ |
201 | static ssize_t |
202 | sd_store_manage_start_stop(struct device *dev, struct device_attribute *attr, | |
203 | const char *buf, size_t count) | |
c3c94c5a | 204 | { |
ee959b00 | 205 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
c3c94c5a TH |
206 | struct scsi_device *sdp = sdkp->device; |
207 | ||
208 | if (!capable(CAP_SYS_ADMIN)) | |
209 | return -EACCES; | |
210 | ||
211 | sdp->manage_start_stop = simple_strtoul(buf, NULL, 10); | |
212 | ||
213 | return count; | |
214 | } | |
215 | ||
ee959b00 TJ |
216 | static ssize_t |
217 | sd_store_allow_restart(struct device *dev, struct device_attribute *attr, | |
218 | const char *buf, size_t count) | |
a144c5ae | 219 | { |
ee959b00 | 220 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
a144c5ae BK |
221 | struct scsi_device *sdp = sdkp->device; |
222 | ||
223 | if (!capable(CAP_SYS_ADMIN)) | |
224 | return -EACCES; | |
225 | ||
226 | if (sdp->type != TYPE_DISK) | |
227 | return -EINVAL; | |
228 | ||
229 | sdp->allow_restart = simple_strtoul(buf, NULL, 10); | |
230 | ||
231 | return count; | |
232 | } | |
233 | ||
ee959b00 TJ |
234 | static ssize_t |
235 | sd_show_cache_type(struct device *dev, struct device_attribute *attr, | |
236 | char *buf) | |
6bdaa1f1 | 237 | { |
ee959b00 | 238 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
239 | int ct = sdkp->RCD + 2*sdkp->WCE; |
240 | ||
241 | return snprintf(buf, 40, "%s\n", sd_cache_types[ct]); | |
242 | } | |
243 | ||
ee959b00 TJ |
244 | static ssize_t |
245 | sd_show_fua(struct device *dev, struct device_attribute *attr, char *buf) | |
6bdaa1f1 | 246 | { |
ee959b00 | 247 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
248 | |
249 | return snprintf(buf, 20, "%u\n", sdkp->DPOFUA); | |
250 | } | |
251 | ||
ee959b00 TJ |
252 | static ssize_t |
253 | sd_show_manage_start_stop(struct device *dev, struct device_attribute *attr, | |
254 | char *buf) | |
c3c94c5a | 255 | { |
ee959b00 | 256 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
c3c94c5a TH |
257 | struct scsi_device *sdp = sdkp->device; |
258 | ||
259 | return snprintf(buf, 20, "%u\n", sdp->manage_start_stop); | |
260 | } | |
261 | ||
ee959b00 TJ |
262 | static ssize_t |
263 | sd_show_allow_restart(struct device *dev, struct device_attribute *attr, | |
264 | char *buf) | |
a144c5ae | 265 | { |
ee959b00 | 266 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
a144c5ae BK |
267 | |
268 | return snprintf(buf, 40, "%d\n", sdkp->device->allow_restart); | |
269 | } | |
270 | ||
e0597d70 MP |
271 | static ssize_t |
272 | sd_show_protection_type(struct device *dev, struct device_attribute *attr, | |
273 | char *buf) | |
274 | { | |
275 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
276 | ||
277 | return snprintf(buf, 20, "%u\n", sdkp->protection_type); | |
278 | } | |
279 | ||
8172499a MP |
280 | static ssize_t |
281 | sd_store_protection_type(struct device *dev, struct device_attribute *attr, | |
282 | const char *buf, size_t count) | |
283 | { | |
284 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
285 | unsigned int val; | |
286 | int err; | |
287 | ||
288 | if (!capable(CAP_SYS_ADMIN)) | |
289 | return -EACCES; | |
290 | ||
291 | err = kstrtouint(buf, 10, &val); | |
292 | ||
293 | if (err) | |
294 | return err; | |
295 | ||
296 | if (val >= 0 && val <= SD_DIF_TYPE3_PROTECTION) | |
297 | sdkp->protection_type = val; | |
298 | ||
299 | return count; | |
300 | } | |
301 | ||
518fa8e3 MP |
302 | static ssize_t |
303 | sd_show_protection_mode(struct device *dev, struct device_attribute *attr, | |
304 | char *buf) | |
305 | { | |
306 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
307 | struct scsi_device *sdp = sdkp->device; | |
308 | unsigned int dif, dix; | |
309 | ||
310 | dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type); | |
311 | dix = scsi_host_dix_capable(sdp->host, sdkp->protection_type); | |
312 | ||
313 | if (!dix && scsi_host_dix_capable(sdp->host, SD_DIF_TYPE0_PROTECTION)) { | |
314 | dif = 0; | |
315 | dix = 1; | |
316 | } | |
317 | ||
318 | if (!dif && !dix) | |
319 | return snprintf(buf, 20, "none\n"); | |
320 | ||
321 | return snprintf(buf, 20, "%s%u\n", dix ? "dix" : "dif", dif); | |
322 | } | |
323 | ||
e0597d70 MP |
324 | static ssize_t |
325 | sd_show_app_tag_own(struct device *dev, struct device_attribute *attr, | |
326 | char *buf) | |
327 | { | |
328 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
329 | ||
330 | return snprintf(buf, 20, "%u\n", sdkp->ATO); | |
331 | } | |
332 | ||
e339c1a7 MP |
333 | static ssize_t |
334 | sd_show_thin_provisioning(struct device *dev, struct device_attribute *attr, | |
335 | char *buf) | |
336 | { | |
337 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
338 | ||
c98a0eb0 MP |
339 | return snprintf(buf, 20, "%u\n", sdkp->lbpme); |
340 | } | |
341 | ||
342 | static const char *lbp_mode[] = { | |
343 | [SD_LBP_FULL] = "full", | |
344 | [SD_LBP_UNMAP] = "unmap", | |
345 | [SD_LBP_WS16] = "writesame_16", | |
346 | [SD_LBP_WS10] = "writesame_10", | |
347 | [SD_LBP_ZERO] = "writesame_zero", | |
348 | [SD_LBP_DISABLE] = "disabled", | |
349 | }; | |
350 | ||
351 | static ssize_t | |
352 | sd_show_provisioning_mode(struct device *dev, struct device_attribute *attr, | |
353 | char *buf) | |
354 | { | |
355 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
356 | ||
357 | return snprintf(buf, 20, "%s\n", lbp_mode[sdkp->provisioning_mode]); | |
358 | } | |
359 | ||
360 | static ssize_t | |
361 | sd_store_provisioning_mode(struct device *dev, struct device_attribute *attr, | |
362 | const char *buf, size_t count) | |
363 | { | |
364 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
365 | struct scsi_device *sdp = sdkp->device; | |
366 | ||
367 | if (!capable(CAP_SYS_ADMIN)) | |
368 | return -EACCES; | |
369 | ||
370 | if (sdp->type != TYPE_DISK) | |
371 | return -EINVAL; | |
372 | ||
373 | if (!strncmp(buf, lbp_mode[SD_LBP_UNMAP], 20)) | |
374 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
375 | else if (!strncmp(buf, lbp_mode[SD_LBP_WS16], 20)) | |
376 | sd_config_discard(sdkp, SD_LBP_WS16); | |
377 | else if (!strncmp(buf, lbp_mode[SD_LBP_WS10], 20)) | |
378 | sd_config_discard(sdkp, SD_LBP_WS10); | |
379 | else if (!strncmp(buf, lbp_mode[SD_LBP_ZERO], 20)) | |
380 | sd_config_discard(sdkp, SD_LBP_ZERO); | |
381 | else if (!strncmp(buf, lbp_mode[SD_LBP_DISABLE], 20)) | |
382 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
383 | else | |
384 | return -EINVAL; | |
385 | ||
386 | return count; | |
e339c1a7 MP |
387 | } |
388 | ||
18a4d0a2 MP |
389 | static ssize_t |
390 | sd_show_max_medium_access_timeouts(struct device *dev, | |
391 | struct device_attribute *attr, char *buf) | |
392 | { | |
393 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
394 | ||
395 | return snprintf(buf, 20, "%u\n", sdkp->max_medium_access_timeouts); | |
396 | } | |
397 | ||
398 | static ssize_t | |
399 | sd_store_max_medium_access_timeouts(struct device *dev, | |
400 | struct device_attribute *attr, | |
401 | const char *buf, size_t count) | |
402 | { | |
403 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
404 | int err; | |
405 | ||
406 | if (!capable(CAP_SYS_ADMIN)) | |
407 | return -EACCES; | |
408 | ||
409 | err = kstrtouint(buf, 10, &sdkp->max_medium_access_timeouts); | |
410 | ||
411 | return err ? err : count; | |
412 | } | |
413 | ||
5db44863 MP |
414 | static ssize_t |
415 | sd_show_write_same_blocks(struct device *dev, struct device_attribute *attr, | |
416 | char *buf) | |
417 | { | |
418 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
419 | ||
420 | return snprintf(buf, 20, "%u\n", sdkp->max_ws_blocks); | |
421 | } | |
422 | ||
423 | static ssize_t | |
424 | sd_store_write_same_blocks(struct device *dev, struct device_attribute *attr, | |
425 | const char *buf, size_t count) | |
426 | { | |
427 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
428 | struct scsi_device *sdp = sdkp->device; | |
429 | unsigned long max; | |
430 | int err; | |
431 | ||
432 | if (!capable(CAP_SYS_ADMIN)) | |
433 | return -EACCES; | |
434 | ||
435 | if (sdp->type != TYPE_DISK) | |
436 | return -EINVAL; | |
437 | ||
438 | err = kstrtoul(buf, 10, &max); | |
439 | ||
440 | if (err) | |
441 | return err; | |
442 | ||
443 | if (max == 0) | |
444 | sdp->no_write_same = 1; | |
445 | else if (max <= SD_MAX_WS16_BLOCKS) | |
446 | sdkp->max_ws_blocks = max; | |
447 | ||
448 | sd_config_write_same(sdkp); | |
449 | ||
450 | return count; | |
451 | } | |
452 | ||
ee959b00 | 453 | static struct device_attribute sd_disk_attrs[] = { |
6bdaa1f1 JB |
454 | __ATTR(cache_type, S_IRUGO|S_IWUSR, sd_show_cache_type, |
455 | sd_store_cache_type), | |
456 | __ATTR(FUA, S_IRUGO, sd_show_fua, NULL), | |
a144c5ae BK |
457 | __ATTR(allow_restart, S_IRUGO|S_IWUSR, sd_show_allow_restart, |
458 | sd_store_allow_restart), | |
c3c94c5a TH |
459 | __ATTR(manage_start_stop, S_IRUGO|S_IWUSR, sd_show_manage_start_stop, |
460 | sd_store_manage_start_stop), | |
8172499a MP |
461 | __ATTR(protection_type, S_IRUGO|S_IWUSR, sd_show_protection_type, |
462 | sd_store_protection_type), | |
518fa8e3 | 463 | __ATTR(protection_mode, S_IRUGO, sd_show_protection_mode, NULL), |
e0597d70 | 464 | __ATTR(app_tag_own, S_IRUGO, sd_show_app_tag_own, NULL), |
e339c1a7 | 465 | __ATTR(thin_provisioning, S_IRUGO, sd_show_thin_provisioning, NULL), |
c98a0eb0 MP |
466 | __ATTR(provisioning_mode, S_IRUGO|S_IWUSR, sd_show_provisioning_mode, |
467 | sd_store_provisioning_mode), | |
5db44863 MP |
468 | __ATTR(max_write_same_blocks, S_IRUGO|S_IWUSR, |
469 | sd_show_write_same_blocks, sd_store_write_same_blocks), | |
18a4d0a2 MP |
470 | __ATTR(max_medium_access_timeouts, S_IRUGO|S_IWUSR, |
471 | sd_show_max_medium_access_timeouts, | |
472 | sd_store_max_medium_access_timeouts), | |
6bdaa1f1 JB |
473 | __ATTR_NULL, |
474 | }; | |
475 | ||
476 | static struct class sd_disk_class = { | |
477 | .name = "scsi_disk", | |
478 | .owner = THIS_MODULE, | |
ee959b00 TJ |
479 | .dev_release = scsi_disk_release, |
480 | .dev_attrs = sd_disk_attrs, | |
6bdaa1f1 | 481 | }; |
1da177e4 | 482 | |
691e3d31 AL |
483 | static const struct dev_pm_ops sd_pm_ops = { |
484 | .suspend = sd_suspend, | |
485 | .resume = sd_resume, | |
486 | .poweroff = sd_suspend, | |
487 | .restore = sd_resume, | |
488 | .runtime_suspend = sd_suspend, | |
489 | .runtime_resume = sd_resume, | |
490 | }; | |
491 | ||
1da177e4 LT |
492 | static struct scsi_driver sd_template = { |
493 | .owner = THIS_MODULE, | |
494 | .gendrv = { | |
495 | .name = "sd", | |
496 | .probe = sd_probe, | |
497 | .remove = sd_remove, | |
498 | .shutdown = sd_shutdown, | |
691e3d31 | 499 | .pm = &sd_pm_ops, |
1da177e4 LT |
500 | }, |
501 | .rescan = sd_rescan, | |
7b3d9545 | 502 | .done = sd_done, |
18a4d0a2 | 503 | .eh_action = sd_eh_action, |
1da177e4 LT |
504 | }; |
505 | ||
506 | /* | |
507 | * Device no to disk mapping: | |
508 | * | |
509 | * major disc2 disc p1 | |
510 | * |............|.............|....|....| <- dev_t | |
511 | * 31 20 19 8 7 4 3 0 | |
512 | * | |
513 | * Inside a major, we have 16k disks, however mapped non- | |
514 | * contiguously. The first 16 disks are for major0, the next | |
515 | * ones with major1, ... Disk 256 is for major0 again, disk 272 | |
516 | * for major1, ... | |
517 | * As we stay compatible with our numbering scheme, we can reuse | |
518 | * the well-know SCSI majors 8, 65--71, 136--143. | |
519 | */ | |
520 | static int sd_major(int major_idx) | |
521 | { | |
522 | switch (major_idx) { | |
523 | case 0: | |
524 | return SCSI_DISK0_MAJOR; | |
525 | case 1 ... 7: | |
526 | return SCSI_DISK1_MAJOR + major_idx - 1; | |
527 | case 8 ... 15: | |
528 | return SCSI_DISK8_MAJOR + major_idx - 8; | |
529 | default: | |
530 | BUG(); | |
531 | return 0; /* shut up gcc */ | |
532 | } | |
533 | } | |
534 | ||
39b7f1e2 | 535 | static struct scsi_disk *__scsi_disk_get(struct gendisk *disk) |
1da177e4 LT |
536 | { |
537 | struct scsi_disk *sdkp = NULL; | |
538 | ||
39b7f1e2 AS |
539 | if (disk->private_data) { |
540 | sdkp = scsi_disk(disk); | |
541 | if (scsi_device_get(sdkp->device) == 0) | |
ee959b00 | 542 | get_device(&sdkp->dev); |
39b7f1e2 AS |
543 | else |
544 | sdkp = NULL; | |
545 | } | |
546 | return sdkp; | |
547 | } | |
548 | ||
549 | static struct scsi_disk *scsi_disk_get(struct gendisk *disk) | |
550 | { | |
551 | struct scsi_disk *sdkp; | |
552 | ||
0b950672 | 553 | mutex_lock(&sd_ref_mutex); |
39b7f1e2 | 554 | sdkp = __scsi_disk_get(disk); |
0b950672 | 555 | mutex_unlock(&sd_ref_mutex); |
1da177e4 | 556 | return sdkp; |
39b7f1e2 | 557 | } |
1da177e4 | 558 | |
39b7f1e2 AS |
559 | static struct scsi_disk *scsi_disk_get_from_dev(struct device *dev) |
560 | { | |
561 | struct scsi_disk *sdkp; | |
562 | ||
0b950672 | 563 | mutex_lock(&sd_ref_mutex); |
39b7f1e2 AS |
564 | sdkp = dev_get_drvdata(dev); |
565 | if (sdkp) | |
566 | sdkp = __scsi_disk_get(sdkp->disk); | |
0b950672 | 567 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
568 | return sdkp; |
569 | } | |
570 | ||
571 | static void scsi_disk_put(struct scsi_disk *sdkp) | |
572 | { | |
573 | struct scsi_device *sdev = sdkp->device; | |
574 | ||
0b950672 | 575 | mutex_lock(&sd_ref_mutex); |
ee959b00 | 576 | put_device(&sdkp->dev); |
1da177e4 | 577 | scsi_device_put(sdev); |
0b950672 | 578 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
579 | } |
580 | ||
35e1a5d9 MP |
581 | static void sd_prot_op(struct scsi_cmnd *scmd, unsigned int dif) |
582 | { | |
583 | unsigned int prot_op = SCSI_PROT_NORMAL; | |
584 | unsigned int dix = scsi_prot_sg_count(scmd); | |
585 | ||
586 | if (scmd->sc_data_direction == DMA_FROM_DEVICE) { | |
587 | if (dif && dix) | |
588 | prot_op = SCSI_PROT_READ_PASS; | |
589 | else if (dif && !dix) | |
590 | prot_op = SCSI_PROT_READ_STRIP; | |
591 | else if (!dif && dix) | |
592 | prot_op = SCSI_PROT_READ_INSERT; | |
593 | } else { | |
594 | if (dif && dix) | |
595 | prot_op = SCSI_PROT_WRITE_PASS; | |
596 | else if (dif && !dix) | |
597 | prot_op = SCSI_PROT_WRITE_INSERT; | |
598 | else if (!dif && dix) | |
599 | prot_op = SCSI_PROT_WRITE_STRIP; | |
600 | } | |
601 | ||
602 | scsi_set_prot_op(scmd, prot_op); | |
603 | scsi_set_prot_type(scmd, dif); | |
604 | } | |
605 | ||
c98a0eb0 MP |
606 | static void sd_config_discard(struct scsi_disk *sdkp, unsigned int mode) |
607 | { | |
608 | struct request_queue *q = sdkp->disk->queue; | |
609 | unsigned int logical_block_size = sdkp->device->sector_size; | |
610 | unsigned int max_blocks = 0; | |
611 | ||
612 | q->limits.discard_zeroes_data = sdkp->lbprz; | |
2a8cfad0 MP |
613 | q->limits.discard_alignment = sdkp->unmap_alignment * |
614 | logical_block_size; | |
c98a0eb0 MP |
615 | q->limits.discard_granularity = |
616 | max(sdkp->physical_block_size, | |
617 | sdkp->unmap_granularity * logical_block_size); | |
618 | ||
89730393 MP |
619 | sdkp->provisioning_mode = mode; |
620 | ||
c98a0eb0 MP |
621 | switch (mode) { |
622 | ||
623 | case SD_LBP_DISABLE: | |
624 | q->limits.max_discard_sectors = 0; | |
625 | queue_flag_clear_unlocked(QUEUE_FLAG_DISCARD, q); | |
626 | return; | |
627 | ||
628 | case SD_LBP_UNMAP: | |
5db44863 MP |
629 | max_blocks = min_not_zero(sdkp->max_unmap_blocks, |
630 | (u32)SD_MAX_WS16_BLOCKS); | |
c98a0eb0 MP |
631 | break; |
632 | ||
633 | case SD_LBP_WS16: | |
5db44863 MP |
634 | max_blocks = min_not_zero(sdkp->max_ws_blocks, |
635 | (u32)SD_MAX_WS16_BLOCKS); | |
c98a0eb0 MP |
636 | break; |
637 | ||
638 | case SD_LBP_WS10: | |
5db44863 MP |
639 | max_blocks = min_not_zero(sdkp->max_ws_blocks, |
640 | (u32)SD_MAX_WS10_BLOCKS); | |
c98a0eb0 MP |
641 | break; |
642 | ||
643 | case SD_LBP_ZERO: | |
5db44863 MP |
644 | max_blocks = min_not_zero(sdkp->max_ws_blocks, |
645 | (u32)SD_MAX_WS10_BLOCKS); | |
c98a0eb0 MP |
646 | q->limits.discard_zeroes_data = 1; |
647 | break; | |
648 | } | |
649 | ||
650 | q->limits.max_discard_sectors = max_blocks * (logical_block_size >> 9); | |
651 | queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, q); | |
c98a0eb0 MP |
652 | } |
653 | ||
e339c1a7 | 654 | /** |
26e85fcd | 655 | * sd_setup_discard_cmnd - unmap blocks on thinly provisioned device |
66ac0280 | 656 | * @sdp: scsi device to operate one |
e339c1a7 MP |
657 | * @rq: Request to prepare |
658 | * | |
659 | * Will issue either UNMAP or WRITE SAME(16) depending on preference | |
660 | * indicated by target device. | |
661 | **/ | |
26e85fcd | 662 | static int sd_setup_discard_cmnd(struct scsi_device *sdp, struct request *rq) |
e339c1a7 MP |
663 | { |
664 | struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); | |
26e85fcd MP |
665 | sector_t sector = blk_rq_pos(rq); |
666 | unsigned int nr_sectors = blk_rq_sectors(rq); | |
667 | unsigned int nr_bytes = blk_rq_bytes(rq); | |
66ac0280 | 668 | unsigned int len; |
f1126e95 | 669 | int ret; |
c98a0eb0 | 670 | char *buf; |
66ac0280 | 671 | struct page *page; |
e339c1a7 | 672 | |
26e85fcd MP |
673 | sector >>= ilog2(sdp->sector_size) - 9; |
674 | nr_sectors >>= ilog2(sdp->sector_size) - 9; | |
e339c1a7 MP |
675 | rq->timeout = SD_TIMEOUT; |
676 | ||
677 | memset(rq->cmd, 0, rq->cmd_len); | |
678 | ||
66ac0280 CH |
679 | page = alloc_page(GFP_ATOMIC | __GFP_ZERO); |
680 | if (!page) | |
681 | return BLKPREP_DEFER; | |
682 | ||
c98a0eb0 MP |
683 | switch (sdkp->provisioning_mode) { |
684 | case SD_LBP_UNMAP: | |
685 | buf = page_address(page); | |
e339c1a7 | 686 | |
66ac0280 | 687 | rq->cmd_len = 10; |
e339c1a7 MP |
688 | rq->cmd[0] = UNMAP; |
689 | rq->cmd[8] = 24; | |
e339c1a7 MP |
690 | |
691 | put_unaligned_be16(6 + 16, &buf[0]); | |
692 | put_unaligned_be16(16, &buf[2]); | |
693 | put_unaligned_be64(sector, &buf[8]); | |
66ac0280 | 694 | put_unaligned_be32(nr_sectors, &buf[16]); |
e339c1a7 | 695 | |
66ac0280 | 696 | len = 24; |
c98a0eb0 MP |
697 | break; |
698 | ||
699 | case SD_LBP_WS16: | |
66ac0280 | 700 | rq->cmd_len = 16; |
e339c1a7 MP |
701 | rq->cmd[0] = WRITE_SAME_16; |
702 | rq->cmd[1] = 0x8; /* UNMAP */ | |
703 | put_unaligned_be64(sector, &rq->cmd[2]); | |
66ac0280 CH |
704 | put_unaligned_be32(nr_sectors, &rq->cmd[10]); |
705 | ||
706 | len = sdkp->device->sector_size; | |
c98a0eb0 MP |
707 | break; |
708 | ||
709 | case SD_LBP_WS10: | |
710 | case SD_LBP_ZERO: | |
711 | rq->cmd_len = 10; | |
712 | rq->cmd[0] = WRITE_SAME; | |
713 | if (sdkp->provisioning_mode == SD_LBP_WS10) | |
714 | rq->cmd[1] = 0x8; /* UNMAP */ | |
715 | put_unaligned_be32(sector, &rq->cmd[2]); | |
716 | put_unaligned_be16(nr_sectors, &rq->cmd[7]); | |
717 | ||
718 | len = sdkp->device->sector_size; | |
719 | break; | |
720 | ||
721 | default: | |
09b9cc44 | 722 | ret = BLKPREP_KILL; |
c98a0eb0 | 723 | goto out; |
e339c1a7 MP |
724 | } |
725 | ||
66ac0280 | 726 | blk_add_request_payload(rq, page, len); |
f1126e95 FT |
727 | ret = scsi_setup_blk_pc_cmnd(sdp, rq); |
728 | rq->buffer = page_address(page); | |
26e85fcd | 729 | rq->__data_len = nr_bytes; |
c98a0eb0 MP |
730 | |
731 | out: | |
610a6349 FT |
732 | if (ret != BLKPREP_OK) { |
733 | __free_page(page); | |
734 | rq->buffer = NULL; | |
735 | } | |
f1126e95 FT |
736 | return ret; |
737 | } | |
738 | ||
5db44863 MP |
739 | static void sd_config_write_same(struct scsi_disk *sdkp) |
740 | { | |
741 | struct request_queue *q = sdkp->disk->queue; | |
742 | unsigned int logical_block_size = sdkp->device->sector_size; | |
743 | unsigned int blocks = 0; | |
744 | ||
745 | if (sdkp->device->no_write_same) { | |
746 | sdkp->max_ws_blocks = 0; | |
747 | goto out; | |
748 | } | |
749 | ||
750 | /* Some devices can not handle block counts above 0xffff despite | |
751 | * supporting WRITE SAME(16). Consequently we default to 64k | |
752 | * blocks per I/O unless the device explicitly advertises a | |
753 | * bigger limit. | |
754 | */ | |
755 | if (sdkp->max_ws_blocks == 0) | |
756 | sdkp->max_ws_blocks = SD_MAX_WS10_BLOCKS; | |
757 | ||
758 | if (sdkp->ws16 || sdkp->max_ws_blocks > SD_MAX_WS10_BLOCKS) | |
759 | blocks = min_not_zero(sdkp->max_ws_blocks, | |
760 | (u32)SD_MAX_WS16_BLOCKS); | |
761 | else | |
762 | blocks = min_not_zero(sdkp->max_ws_blocks, | |
763 | (u32)SD_MAX_WS10_BLOCKS); | |
764 | ||
765 | out: | |
766 | blk_queue_max_write_same_sectors(q, blocks * (logical_block_size >> 9)); | |
767 | } | |
768 | ||
769 | /** | |
770 | * sd_setup_write_same_cmnd - write the same data to multiple blocks | |
771 | * @sdp: scsi device to operate one | |
772 | * @rq: Request to prepare | |
773 | * | |
774 | * Will issue either WRITE SAME(10) or WRITE SAME(16) depending on | |
775 | * preference indicated by target device. | |
776 | **/ | |
777 | static int sd_setup_write_same_cmnd(struct scsi_device *sdp, struct request *rq) | |
778 | { | |
779 | struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); | |
780 | struct bio *bio = rq->bio; | |
781 | sector_t sector = blk_rq_pos(rq); | |
782 | unsigned int nr_sectors = blk_rq_sectors(rq); | |
783 | unsigned int nr_bytes = blk_rq_bytes(rq); | |
784 | int ret; | |
785 | ||
786 | if (sdkp->device->no_write_same) | |
787 | return BLKPREP_KILL; | |
788 | ||
789 | BUG_ON(bio_offset(bio) || bio_iovec(bio)->bv_len != sdp->sector_size); | |
790 | ||
791 | sector >>= ilog2(sdp->sector_size) - 9; | |
792 | nr_sectors >>= ilog2(sdp->sector_size) - 9; | |
793 | ||
794 | rq->__data_len = sdp->sector_size; | |
795 | rq->timeout = SD_WRITE_SAME_TIMEOUT; | |
796 | memset(rq->cmd, 0, rq->cmd_len); | |
797 | ||
798 | if (sdkp->ws16 || sector > 0xffffffff || nr_sectors > 0xffff) { | |
799 | rq->cmd_len = 16; | |
800 | rq->cmd[0] = WRITE_SAME_16; | |
801 | put_unaligned_be64(sector, &rq->cmd[2]); | |
802 | put_unaligned_be32(nr_sectors, &rq->cmd[10]); | |
803 | } else { | |
804 | rq->cmd_len = 10; | |
805 | rq->cmd[0] = WRITE_SAME; | |
806 | put_unaligned_be32(sector, &rq->cmd[2]); | |
807 | put_unaligned_be16(nr_sectors, &rq->cmd[7]); | |
808 | } | |
809 | ||
810 | ret = scsi_setup_blk_pc_cmnd(sdp, rq); | |
811 | rq->__data_len = nr_bytes; | |
812 | ||
813 | return ret; | |
814 | } | |
815 | ||
90467c29 FT |
816 | static int scsi_setup_flush_cmnd(struct scsi_device *sdp, struct request *rq) |
817 | { | |
e3b3e624 | 818 | rq->timeout = SD_FLUSH_TIMEOUT; |
90467c29 FT |
819 | rq->retries = SD_MAX_RETRIES; |
820 | rq->cmd[0] = SYNCHRONIZE_CACHE; | |
821 | rq->cmd_len = 10; | |
822 | ||
823 | return scsi_setup_blk_pc_cmnd(sdp, rq); | |
824 | } | |
825 | ||
f1126e95 FT |
826 | static void sd_unprep_fn(struct request_queue *q, struct request *rq) |
827 | { | |
610a6349 FT |
828 | if (rq->cmd_flags & REQ_DISCARD) { |
829 | free_page((unsigned long)rq->buffer); | |
830 | rq->buffer = NULL; | |
831 | } | |
e339c1a7 MP |
832 | } |
833 | ||
1da177e4 | 834 | /** |
2db93ce8 | 835 | * sd_prep_fn - build a scsi (read or write) command from |
1da177e4 LT |
836 | * information in the request structure. |
837 | * @SCpnt: pointer to mid-level's per scsi command structure that | |
838 | * contains request and into which the scsi command is written | |
839 | * | |
840 | * Returns 1 if successful and 0 if error (or cannot be done now). | |
841 | **/ | |
7f9a6bc4 | 842 | static int sd_prep_fn(struct request_queue *q, struct request *rq) |
1da177e4 | 843 | { |
7f9a6bc4 JB |
844 | struct scsi_cmnd *SCpnt; |
845 | struct scsi_device *sdp = q->queuedata; | |
776b23a0 | 846 | struct gendisk *disk = rq->rq_disk; |
af55ff67 | 847 | struct scsi_disk *sdkp; |
83096ebf | 848 | sector_t block = blk_rq_pos(rq); |
18351070 | 849 | sector_t threshold; |
83096ebf | 850 | unsigned int this_count = blk_rq_sectors(rq); |
bd623e79 | 851 | int ret, host_dif; |
4e7392ec | 852 | unsigned char protect; |
7f9a6bc4 | 853 | |
e339c1a7 MP |
854 | /* |
855 | * Discard request come in as REQ_TYPE_FS but we turn them into | |
856 | * block PC requests to make life easier. | |
857 | */ | |
66ac0280 | 858 | if (rq->cmd_flags & REQ_DISCARD) { |
26e85fcd | 859 | ret = sd_setup_discard_cmnd(sdp, rq); |
66ac0280 | 860 | goto out; |
5db44863 MP |
861 | } else if (rq->cmd_flags & REQ_WRITE_SAME) { |
862 | ret = sd_setup_write_same_cmnd(sdp, rq); | |
863 | goto out; | |
90467c29 FT |
864 | } else if (rq->cmd_flags & REQ_FLUSH) { |
865 | ret = scsi_setup_flush_cmnd(sdp, rq); | |
866 | goto out; | |
66ac0280 | 867 | } else if (rq->cmd_type == REQ_TYPE_BLOCK_PC) { |
7f9a6bc4 JB |
868 | ret = scsi_setup_blk_pc_cmnd(sdp, rq); |
869 | goto out; | |
870 | } else if (rq->cmd_type != REQ_TYPE_FS) { | |
871 | ret = BLKPREP_KILL; | |
872 | goto out; | |
873 | } | |
874 | ret = scsi_setup_fs_cmnd(sdp, rq); | |
875 | if (ret != BLKPREP_OK) | |
876 | goto out; | |
877 | SCpnt = rq->special; | |
af55ff67 | 878 | sdkp = scsi_disk(disk); |
7f9a6bc4 JB |
879 | |
880 | /* from here on until we're complete, any goto out | |
881 | * is used for a killable error condition */ | |
882 | ret = BLKPREP_KILL; | |
1da177e4 | 883 | |
fa0d34be | 884 | SCSI_LOG_HLQUEUE(1, scmd_printk(KERN_INFO, SCpnt, |
2db93ce8 | 885 | "sd_prep_fn: block=%llu, " |
fa0d34be MP |
886 | "count=%d\n", |
887 | (unsigned long long)block, | |
888 | this_count)); | |
1da177e4 LT |
889 | |
890 | if (!sdp || !scsi_device_online(sdp) || | |
83096ebf | 891 | block + blk_rq_sectors(rq) > get_capacity(disk)) { |
fa0d34be | 892 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
83096ebf TH |
893 | "Finishing %u sectors\n", |
894 | blk_rq_sectors(rq))); | |
fa0d34be MP |
895 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
896 | "Retry with 0x%p\n", SCpnt)); | |
7f9a6bc4 | 897 | goto out; |
1da177e4 LT |
898 | } |
899 | ||
900 | if (sdp->changed) { | |
901 | /* | |
902 | * quietly refuse to do anything to a changed disc until | |
903 | * the changed bit has been reset | |
904 | */ | |
3ff5588d | 905 | /* printk("SCSI disk has been changed or is not present. Prohibiting further I/O.\n"); */ |
7f9a6bc4 | 906 | goto out; |
1da177e4 | 907 | } |
7f9a6bc4 | 908 | |
a0899d4d | 909 | /* |
18351070 LT |
910 | * Some SD card readers can't handle multi-sector accesses which touch |
911 | * the last one or two hardware sectors. Split accesses as needed. | |
a0899d4d | 912 | */ |
18351070 LT |
913 | threshold = get_capacity(disk) - SD_LAST_BUGGY_SECTORS * |
914 | (sdp->sector_size / 512); | |
915 | ||
916 | if (unlikely(sdp->last_sector_bug && block + this_count > threshold)) { | |
917 | if (block < threshold) { | |
918 | /* Access up to the threshold but not beyond */ | |
919 | this_count = threshold - block; | |
920 | } else { | |
921 | /* Access only a single hardware sector */ | |
922 | this_count = sdp->sector_size / 512; | |
923 | } | |
924 | } | |
a0899d4d | 925 | |
fa0d34be MP |
926 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, "block=%llu\n", |
927 | (unsigned long long)block)); | |
1da177e4 LT |
928 | |
929 | /* | |
930 | * If we have a 1K hardware sectorsize, prevent access to single | |
931 | * 512 byte sectors. In theory we could handle this - in fact | |
932 | * the scsi cdrom driver must be able to handle this because | |
933 | * we typically use 1K blocksizes, and cdroms typically have | |
934 | * 2K hardware sectorsizes. Of course, things are simpler | |
935 | * with the cdrom, since it is read-only. For performance | |
936 | * reasons, the filesystems should be able to handle this | |
937 | * and not force the scsi disk driver to use bounce buffers | |
938 | * for this. | |
939 | */ | |
940 | if (sdp->sector_size == 1024) { | |
83096ebf | 941 | if ((block & 1) || (blk_rq_sectors(rq) & 1)) { |
e73aec82 MP |
942 | scmd_printk(KERN_ERR, SCpnt, |
943 | "Bad block number requested\n"); | |
7f9a6bc4 | 944 | goto out; |
1da177e4 LT |
945 | } else { |
946 | block = block >> 1; | |
947 | this_count = this_count >> 1; | |
948 | } | |
949 | } | |
950 | if (sdp->sector_size == 2048) { | |
83096ebf | 951 | if ((block & 3) || (blk_rq_sectors(rq) & 3)) { |
e73aec82 MP |
952 | scmd_printk(KERN_ERR, SCpnt, |
953 | "Bad block number requested\n"); | |
7f9a6bc4 | 954 | goto out; |
1da177e4 LT |
955 | } else { |
956 | block = block >> 2; | |
957 | this_count = this_count >> 2; | |
958 | } | |
959 | } | |
960 | if (sdp->sector_size == 4096) { | |
83096ebf | 961 | if ((block & 7) || (blk_rq_sectors(rq) & 7)) { |
e73aec82 MP |
962 | scmd_printk(KERN_ERR, SCpnt, |
963 | "Bad block number requested\n"); | |
7f9a6bc4 | 964 | goto out; |
1da177e4 LT |
965 | } else { |
966 | block = block >> 3; | |
967 | this_count = this_count >> 3; | |
968 | } | |
969 | } | |
970 | if (rq_data_dir(rq) == WRITE) { | |
971 | if (!sdp->writeable) { | |
7f9a6bc4 | 972 | goto out; |
1da177e4 LT |
973 | } |
974 | SCpnt->cmnd[0] = WRITE_6; | |
975 | SCpnt->sc_data_direction = DMA_TO_DEVICE; | |
af55ff67 | 976 | |
8c579ab6 MP |
977 | if (blk_integrity_rq(rq)) |
978 | sd_dif_prepare(rq, block, sdp->sector_size); | |
af55ff67 | 979 | |
1da177e4 LT |
980 | } else if (rq_data_dir(rq) == READ) { |
981 | SCpnt->cmnd[0] = READ_6; | |
982 | SCpnt->sc_data_direction = DMA_FROM_DEVICE; | |
983 | } else { | |
e73aec82 | 984 | scmd_printk(KERN_ERR, SCpnt, "Unknown command %x\n", rq->cmd_flags); |
7f9a6bc4 | 985 | goto out; |
1da177e4 LT |
986 | } |
987 | ||
fa0d34be | 988 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
83096ebf | 989 | "%s %d/%u 512 byte blocks.\n", |
fa0d34be MP |
990 | (rq_data_dir(rq) == WRITE) ? |
991 | "writing" : "reading", this_count, | |
83096ebf | 992 | blk_rq_sectors(rq))); |
1da177e4 | 993 | |
af55ff67 | 994 | /* Set RDPROTECT/WRPROTECT if disk is formatted with DIF */ |
bd623e79 MP |
995 | host_dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type); |
996 | if (host_dif) | |
4e7392ec | 997 | protect = 1 << 5; |
af55ff67 | 998 | else |
4e7392ec MP |
999 | protect = 0; |
1000 | ||
1001 | if (host_dif == SD_DIF_TYPE2_PROTECTION) { | |
1002 | SCpnt->cmnd = mempool_alloc(sd_cdb_pool, GFP_ATOMIC); | |
1003 | ||
1004 | if (unlikely(SCpnt->cmnd == NULL)) { | |
1005 | ret = BLKPREP_DEFER; | |
1006 | goto out; | |
1007 | } | |
af55ff67 | 1008 | |
4e7392ec MP |
1009 | SCpnt->cmd_len = SD_EXT_CDB_SIZE; |
1010 | memset(SCpnt->cmnd, 0, SCpnt->cmd_len); | |
1011 | SCpnt->cmnd[0] = VARIABLE_LENGTH_CMD; | |
1012 | SCpnt->cmnd[7] = 0x18; | |
1013 | SCpnt->cmnd[9] = (rq_data_dir(rq) == READ) ? READ_32 : WRITE_32; | |
33659ebb | 1014 | SCpnt->cmnd[10] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
4e7392ec MP |
1015 | |
1016 | /* LBA */ | |
1017 | SCpnt->cmnd[12] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0; | |
1018 | SCpnt->cmnd[13] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0; | |
1019 | SCpnt->cmnd[14] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0; | |
1020 | SCpnt->cmnd[15] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0; | |
1021 | SCpnt->cmnd[16] = (unsigned char) (block >> 24) & 0xff; | |
1022 | SCpnt->cmnd[17] = (unsigned char) (block >> 16) & 0xff; | |
1023 | SCpnt->cmnd[18] = (unsigned char) (block >> 8) & 0xff; | |
1024 | SCpnt->cmnd[19] = (unsigned char) block & 0xff; | |
1025 | ||
1026 | /* Expected Indirect LBA */ | |
1027 | SCpnt->cmnd[20] = (unsigned char) (block >> 24) & 0xff; | |
1028 | SCpnt->cmnd[21] = (unsigned char) (block >> 16) & 0xff; | |
1029 | SCpnt->cmnd[22] = (unsigned char) (block >> 8) & 0xff; | |
1030 | SCpnt->cmnd[23] = (unsigned char) block & 0xff; | |
1031 | ||
1032 | /* Transfer length */ | |
1033 | SCpnt->cmnd[28] = (unsigned char) (this_count >> 24) & 0xff; | |
1034 | SCpnt->cmnd[29] = (unsigned char) (this_count >> 16) & 0xff; | |
1035 | SCpnt->cmnd[30] = (unsigned char) (this_count >> 8) & 0xff; | |
1036 | SCpnt->cmnd[31] = (unsigned char) this_count & 0xff; | |
53ad570b | 1037 | } else if (sdp->use_16_for_rw) { |
1da177e4 | 1038 | SCpnt->cmnd[0] += READ_16 - READ_6; |
33659ebb | 1039 | SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
1da177e4 LT |
1040 | SCpnt->cmnd[2] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0; |
1041 | SCpnt->cmnd[3] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0; | |
1042 | SCpnt->cmnd[4] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0; | |
1043 | SCpnt->cmnd[5] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0; | |
1044 | SCpnt->cmnd[6] = (unsigned char) (block >> 24) & 0xff; | |
1045 | SCpnt->cmnd[7] = (unsigned char) (block >> 16) & 0xff; | |
1046 | SCpnt->cmnd[8] = (unsigned char) (block >> 8) & 0xff; | |
1047 | SCpnt->cmnd[9] = (unsigned char) block & 0xff; | |
1048 | SCpnt->cmnd[10] = (unsigned char) (this_count >> 24) & 0xff; | |
1049 | SCpnt->cmnd[11] = (unsigned char) (this_count >> 16) & 0xff; | |
1050 | SCpnt->cmnd[12] = (unsigned char) (this_count >> 8) & 0xff; | |
1051 | SCpnt->cmnd[13] = (unsigned char) this_count & 0xff; | |
1052 | SCpnt->cmnd[14] = SCpnt->cmnd[15] = 0; | |
1053 | } else if ((this_count > 0xff) || (block > 0x1fffff) || | |
af55ff67 | 1054 | scsi_device_protection(SCpnt->device) || |
1da177e4 LT |
1055 | SCpnt->device->use_10_for_rw) { |
1056 | if (this_count > 0xffff) | |
1057 | this_count = 0xffff; | |
1058 | ||
1059 | SCpnt->cmnd[0] += READ_10 - READ_6; | |
33659ebb | 1060 | SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
1da177e4 LT |
1061 | SCpnt->cmnd[2] = (unsigned char) (block >> 24) & 0xff; |
1062 | SCpnt->cmnd[3] = (unsigned char) (block >> 16) & 0xff; | |
1063 | SCpnt->cmnd[4] = (unsigned char) (block >> 8) & 0xff; | |
1064 | SCpnt->cmnd[5] = (unsigned char) block & 0xff; | |
1065 | SCpnt->cmnd[6] = SCpnt->cmnd[9] = 0; | |
1066 | SCpnt->cmnd[7] = (unsigned char) (this_count >> 8) & 0xff; | |
1067 | SCpnt->cmnd[8] = (unsigned char) this_count & 0xff; | |
1068 | } else { | |
33659ebb | 1069 | if (unlikely(rq->cmd_flags & REQ_FUA)) { |
007365ad TH |
1070 | /* |
1071 | * This happens only if this drive failed | |
1072 | * 10byte rw command with ILLEGAL_REQUEST | |
1073 | * during operation and thus turned off | |
1074 | * use_10_for_rw. | |
1075 | */ | |
e73aec82 MP |
1076 | scmd_printk(KERN_ERR, SCpnt, |
1077 | "FUA write on READ/WRITE(6) drive\n"); | |
7f9a6bc4 | 1078 | goto out; |
007365ad TH |
1079 | } |
1080 | ||
1da177e4 LT |
1081 | SCpnt->cmnd[1] |= (unsigned char) ((block >> 16) & 0x1f); |
1082 | SCpnt->cmnd[2] = (unsigned char) ((block >> 8) & 0xff); | |
1083 | SCpnt->cmnd[3] = (unsigned char) block & 0xff; | |
1084 | SCpnt->cmnd[4] = (unsigned char) this_count; | |
1085 | SCpnt->cmnd[5] = 0; | |
1086 | } | |
30b0c37b | 1087 | SCpnt->sdb.length = this_count * sdp->sector_size; |
1da177e4 | 1088 | |
af55ff67 | 1089 | /* If DIF or DIX is enabled, tell HBA how to handle request */ |
bd623e79 | 1090 | if (host_dif || scsi_prot_sg_count(SCpnt)) |
35e1a5d9 | 1091 | sd_prot_op(SCpnt, host_dif); |
af55ff67 | 1092 | |
1da177e4 LT |
1093 | /* |
1094 | * We shouldn't disconnect in the middle of a sector, so with a dumb | |
1095 | * host adapter, it's safe to assume that we can at least transfer | |
1096 | * this many bytes between each connect / disconnect. | |
1097 | */ | |
1098 | SCpnt->transfersize = sdp->sector_size; | |
1099 | SCpnt->underflow = this_count << 9; | |
1100 | SCpnt->allowed = SD_MAX_RETRIES; | |
1da177e4 | 1101 | |
1da177e4 LT |
1102 | /* |
1103 | * This indicates that the command is ready from our end to be | |
1104 | * queued. | |
1105 | */ | |
7f9a6bc4 JB |
1106 | ret = BLKPREP_OK; |
1107 | out: | |
1108 | return scsi_prep_return(q, rq, ret); | |
1da177e4 LT |
1109 | } |
1110 | ||
1111 | /** | |
1112 | * sd_open - open a scsi disk device | |
1113 | * @inode: only i_rdev member may be used | |
1114 | * @filp: only f_mode and f_flags may be used | |
1115 | * | |
1116 | * Returns 0 if successful. Returns a negated errno value in case | |
1117 | * of error. | |
1118 | * | |
1119 | * Note: This can be called from a user context (e.g. fsck(1) ) | |
1120 | * or from within the kernel (e.g. as a result of a mount(1) ). | |
1121 | * In the latter case @inode and @filp carry an abridged amount | |
1122 | * of information as noted above. | |
409f3499 AB |
1123 | * |
1124 | * Locking: called with bdev->bd_mutex held. | |
1da177e4 | 1125 | **/ |
0338e291 | 1126 | static int sd_open(struct block_device *bdev, fmode_t mode) |
1da177e4 | 1127 | { |
0338e291 | 1128 | struct scsi_disk *sdkp = scsi_disk_get(bdev->bd_disk); |
1da177e4 LT |
1129 | struct scsi_device *sdev; |
1130 | int retval; | |
1131 | ||
0338e291 | 1132 | if (!sdkp) |
1da177e4 LT |
1133 | return -ENXIO; |
1134 | ||
fa0d34be | 1135 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_open\n")); |
1da177e4 LT |
1136 | |
1137 | sdev = sdkp->device; | |
1138 | ||
1139 | /* | |
1140 | * If the device is in error recovery, wait until it is done. | |
1141 | * If the device is offline, then disallow any access to it. | |
1142 | */ | |
1143 | retval = -ENXIO; | |
1144 | if (!scsi_block_when_processing_errors(sdev)) | |
1145 | goto error_out; | |
1146 | ||
1147 | if (sdev->removable || sdkp->write_prot) | |
0338e291 | 1148 | check_disk_change(bdev); |
1da177e4 LT |
1149 | |
1150 | /* | |
1151 | * If the drive is empty, just let the open fail. | |
1152 | */ | |
1153 | retval = -ENOMEDIUM; | |
0338e291 | 1154 | if (sdev->removable && !sdkp->media_present && !(mode & FMODE_NDELAY)) |
1da177e4 LT |
1155 | goto error_out; |
1156 | ||
1157 | /* | |
1158 | * If the device has the write protect tab set, have the open fail | |
1159 | * if the user expects to be able to write to the thing. | |
1160 | */ | |
1161 | retval = -EROFS; | |
0338e291 | 1162 | if (sdkp->write_prot && (mode & FMODE_WRITE)) |
1da177e4 LT |
1163 | goto error_out; |
1164 | ||
1165 | /* | |
1166 | * It is possible that the disk changing stuff resulted in | |
1167 | * the device being taken offline. If this is the case, | |
1168 | * report this to the user, and don't pretend that the | |
1169 | * open actually succeeded. | |
1170 | */ | |
1171 | retval = -ENXIO; | |
1172 | if (!scsi_device_online(sdev)) | |
1173 | goto error_out; | |
1174 | ||
409f3499 | 1175 | if ((atomic_inc_return(&sdkp->openers) == 1) && sdev->removable) { |
1da177e4 LT |
1176 | if (scsi_block_when_processing_errors(sdev)) |
1177 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT); | |
1178 | } | |
1179 | ||
1180 | return 0; | |
1181 | ||
1182 | error_out: | |
1183 | scsi_disk_put(sdkp); | |
1184 | return retval; | |
1185 | } | |
1186 | ||
1187 | /** | |
1188 | * sd_release - invoked when the (last) close(2) is called on this | |
1189 | * scsi disk. | |
1190 | * @inode: only i_rdev member may be used | |
1191 | * @filp: only f_mode and f_flags may be used | |
1192 | * | |
1193 | * Returns 0. | |
1194 | * | |
1195 | * Note: may block (uninterruptible) if error recovery is underway | |
1196 | * on this disk. | |
409f3499 AB |
1197 | * |
1198 | * Locking: called with bdev->bd_mutex held. | |
1da177e4 | 1199 | **/ |
db2a144b | 1200 | static void sd_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 1201 | { |
1da177e4 LT |
1202 | struct scsi_disk *sdkp = scsi_disk(disk); |
1203 | struct scsi_device *sdev = sdkp->device; | |
1204 | ||
56937f7b | 1205 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_release\n")); |
1da177e4 | 1206 | |
7e443312 | 1207 | if (atomic_dec_return(&sdkp->openers) == 0 && sdev->removable) { |
1da177e4 LT |
1208 | if (scsi_block_when_processing_errors(sdev)) |
1209 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW); | |
1210 | } | |
1211 | ||
1212 | /* | |
1213 | * XXX and what if there are packets in flight and this close() | |
1214 | * XXX is followed by a "rmmod sd_mod"? | |
1215 | */ | |
478a8a05 | 1216 | |
1da177e4 | 1217 | scsi_disk_put(sdkp); |
1da177e4 LT |
1218 | } |
1219 | ||
a885c8c4 | 1220 | static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
1da177e4 LT |
1221 | { |
1222 | struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk); | |
1223 | struct scsi_device *sdp = sdkp->device; | |
1224 | struct Scsi_Host *host = sdp->host; | |
1225 | int diskinfo[4]; | |
1226 | ||
1227 | /* default to most commonly used values */ | |
1228 | diskinfo[0] = 0x40; /* 1 << 6 */ | |
1229 | diskinfo[1] = 0x20; /* 1 << 5 */ | |
1230 | diskinfo[2] = sdkp->capacity >> 11; | |
1231 | ||
1232 | /* override with calculated, extended default, or driver values */ | |
1233 | if (host->hostt->bios_param) | |
1234 | host->hostt->bios_param(sdp, bdev, sdkp->capacity, diskinfo); | |
1235 | else | |
1236 | scsicam_bios_param(bdev, sdkp->capacity, diskinfo); | |
1237 | ||
a885c8c4 CH |
1238 | geo->heads = diskinfo[0]; |
1239 | geo->sectors = diskinfo[1]; | |
1240 | geo->cylinders = diskinfo[2]; | |
1da177e4 LT |
1241 | return 0; |
1242 | } | |
1243 | ||
1244 | /** | |
1245 | * sd_ioctl - process an ioctl | |
1246 | * @inode: only i_rdev/i_bdev members may be used | |
1247 | * @filp: only f_mode and f_flags may be used | |
1248 | * @cmd: ioctl command number | |
1249 | * @arg: this is third argument given to ioctl(2) system call. | |
1250 | * Often contains a pointer. | |
1251 | * | |
25985edc | 1252 | * Returns 0 if successful (some ioctls return positive numbers on |
1da177e4 LT |
1253 | * success as well). Returns a negated errno value in case of error. |
1254 | * | |
1255 | * Note: most ioctls are forward onto the block subsystem or further | |
3a4fa0a2 | 1256 | * down in the scsi subsystem. |
1da177e4 | 1257 | **/ |
0338e291 | 1258 | static int sd_ioctl(struct block_device *bdev, fmode_t mode, |
1da177e4 LT |
1259 | unsigned int cmd, unsigned long arg) |
1260 | { | |
1da177e4 | 1261 | struct gendisk *disk = bdev->bd_disk; |
fe2d1851 NN |
1262 | struct scsi_disk *sdkp = scsi_disk(disk); |
1263 | struct scsi_device *sdp = sdkp->device; | |
1da177e4 LT |
1264 | void __user *p = (void __user *)arg; |
1265 | int error; | |
1266 | ||
fe2d1851 NN |
1267 | SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO, sdkp, "sd_ioctl: disk=%s, " |
1268 | "cmd=0x%x\n", disk->disk_name, cmd)); | |
1da177e4 | 1269 | |
0bfc96cb PB |
1270 | error = scsi_verify_blk_ioctl(bdev, cmd); |
1271 | if (error < 0) | |
1272 | return error; | |
1273 | ||
1da177e4 LT |
1274 | /* |
1275 | * If we are in the middle of error recovery, don't let anyone | |
1276 | * else try and use this device. Also, if error recovery fails, it | |
1277 | * may try and take the device offline, in which case all further | |
1278 | * access to the device is prohibited. | |
1279 | */ | |
83ff6fe8 | 1280 | error = scsi_nonblockable_ioctl(sdp, cmd, p, |
fd4ce1ac | 1281 | (mode & FMODE_NDELAY) != 0); |
1da177e4 | 1282 | if (!scsi_block_when_processing_errors(sdp) || !error) |
8a6cfeb6 | 1283 | goto out; |
1da177e4 | 1284 | |
1da177e4 LT |
1285 | /* |
1286 | * Send SCSI addressing ioctls directly to mid level, send other | |
1287 | * ioctls to block level and then onto mid level if they can't be | |
1288 | * resolved. | |
1289 | */ | |
1290 | switch (cmd) { | |
1291 | case SCSI_IOCTL_GET_IDLUN: | |
1292 | case SCSI_IOCTL_GET_BUS_NUMBER: | |
8a6cfeb6 AB |
1293 | error = scsi_ioctl(sdp, cmd, p); |
1294 | break; | |
1da177e4 | 1295 | default: |
577ebb37 | 1296 | error = scsi_cmd_blk_ioctl(bdev, mode, cmd, p); |
1da177e4 | 1297 | if (error != -ENOTTY) |
8a6cfeb6 AB |
1298 | break; |
1299 | error = scsi_ioctl(sdp, cmd, p); | |
1300 | break; | |
1da177e4 | 1301 | } |
8a6cfeb6 | 1302 | out: |
8a6cfeb6 | 1303 | return error; |
1da177e4 LT |
1304 | } |
1305 | ||
1306 | static void set_media_not_present(struct scsi_disk *sdkp) | |
1307 | { | |
2bae0093 TH |
1308 | if (sdkp->media_present) |
1309 | sdkp->device->changed = 1; | |
1310 | ||
1311 | if (sdkp->device->removable) { | |
1312 | sdkp->media_present = 0; | |
1313 | sdkp->capacity = 0; | |
1314 | } | |
1315 | } | |
1316 | ||
1317 | static int media_not_present(struct scsi_disk *sdkp, | |
1318 | struct scsi_sense_hdr *sshdr) | |
1319 | { | |
1320 | if (!scsi_sense_valid(sshdr)) | |
1321 | return 0; | |
1322 | ||
1323 | /* not invoked for commands that could return deferred errors */ | |
1324 | switch (sshdr->sense_key) { | |
1325 | case UNIT_ATTENTION: | |
1326 | case NOT_READY: | |
1327 | /* medium not present */ | |
1328 | if (sshdr->asc == 0x3A) { | |
1329 | set_media_not_present(sdkp); | |
1330 | return 1; | |
1331 | } | |
1332 | } | |
1333 | return 0; | |
1da177e4 LT |
1334 | } |
1335 | ||
1336 | /** | |
2bae0093 TH |
1337 | * sd_check_events - check media events |
1338 | * @disk: kernel device descriptor | |
1339 | * @clearing: disk events currently being cleared | |
1da177e4 | 1340 | * |
2bae0093 | 1341 | * Returns mask of DISK_EVENT_*. |
1da177e4 LT |
1342 | * |
1343 | * Note: this function is invoked from the block subsystem. | |
1344 | **/ | |
2bae0093 | 1345 | static unsigned int sd_check_events(struct gendisk *disk, unsigned int clearing) |
1da177e4 LT |
1346 | { |
1347 | struct scsi_disk *sdkp = scsi_disk(disk); | |
1348 | struct scsi_device *sdp = sdkp->device; | |
001aac25 | 1349 | struct scsi_sense_hdr *sshdr = NULL; |
1da177e4 LT |
1350 | int retval; |
1351 | ||
2bae0093 | 1352 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_check_events\n")); |
1da177e4 LT |
1353 | |
1354 | /* | |
1355 | * If the device is offline, don't send any commands - just pretend as | |
1356 | * if the command failed. If the device ever comes back online, we | |
1357 | * can deal with it then. It is only because of unrecoverable errors | |
1358 | * that we would ever take a device offline in the first place. | |
1359 | */ | |
285e9670 KS |
1360 | if (!scsi_device_online(sdp)) { |
1361 | set_media_not_present(sdkp); | |
285e9670 KS |
1362 | goto out; |
1363 | } | |
1da177e4 LT |
1364 | |
1365 | /* | |
1366 | * Using TEST_UNIT_READY enables differentiation between drive with | |
1367 | * no cartridge loaded - NOT READY, drive with changed cartridge - | |
1368 | * UNIT ATTENTION, or with same cartridge - GOOD STATUS. | |
1369 | * | |
1370 | * Drives that auto spin down. eg iomega jaz 1G, will be started | |
1371 | * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever | |
1372 | * sd_revalidate() is called. | |
1373 | */ | |
1374 | retval = -ENODEV; | |
285e9670 | 1375 | |
001aac25 JB |
1376 | if (scsi_block_when_processing_errors(sdp)) { |
1377 | sshdr = kzalloc(sizeof(*sshdr), GFP_KERNEL); | |
1378 | retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, SD_MAX_RETRIES, | |
1379 | sshdr); | |
1380 | } | |
1da177e4 | 1381 | |
2bae0093 TH |
1382 | /* failed to execute TUR, assume media not present */ |
1383 | if (host_byte(retval)) { | |
285e9670 | 1384 | set_media_not_present(sdkp); |
285e9670 KS |
1385 | goto out; |
1386 | } | |
1da177e4 | 1387 | |
2bae0093 TH |
1388 | if (media_not_present(sdkp, sshdr)) |
1389 | goto out; | |
1390 | ||
1da177e4 LT |
1391 | /* |
1392 | * For removable scsi disk we have to recognise the presence | |
2bae0093 | 1393 | * of a disk in the drive. |
1da177e4 | 1394 | */ |
2bae0093 TH |
1395 | if (!sdkp->media_present) |
1396 | sdp->changed = 1; | |
1da177e4 | 1397 | sdkp->media_present = 1; |
285e9670 | 1398 | out: |
3ff5588d | 1399 | /* |
2bae0093 | 1400 | * sdp->changed is set under the following conditions: |
3ff5588d | 1401 | * |
2bae0093 TH |
1402 | * Medium present state has changed in either direction. |
1403 | * Device has indicated UNIT_ATTENTION. | |
3ff5588d | 1404 | */ |
001aac25 | 1405 | kfree(sshdr); |
2bae0093 TH |
1406 | retval = sdp->changed ? DISK_EVENT_MEDIA_CHANGE : 0; |
1407 | sdp->changed = 0; | |
1da177e4 | 1408 | return retval; |
1da177e4 LT |
1409 | } |
1410 | ||
e73aec82 | 1411 | static int sd_sync_cache(struct scsi_disk *sdkp) |
1da177e4 | 1412 | { |
1da177e4 | 1413 | int retries, res; |
e73aec82 | 1414 | struct scsi_device *sdp = sdkp->device; |
ea73a9f2 | 1415 | struct scsi_sense_hdr sshdr; |
1da177e4 LT |
1416 | |
1417 | if (!scsi_device_online(sdp)) | |
1418 | return -ENODEV; | |
1419 | ||
1da177e4 | 1420 | |
1da177e4 LT |
1421 | for (retries = 3; retries > 0; --retries) { |
1422 | unsigned char cmd[10] = { 0 }; | |
1423 | ||
1424 | cmd[0] = SYNCHRONIZE_CACHE; | |
1425 | /* | |
1426 | * Leave the rest of the command zero to indicate | |
1427 | * flush everything. | |
1428 | */ | |
9b21493c LM |
1429 | res = scsi_execute_req_flags(sdp, cmd, DMA_NONE, NULL, 0, |
1430 | &sshdr, SD_FLUSH_TIMEOUT, | |
1431 | SD_MAX_RETRIES, NULL, REQ_PM); | |
ea73a9f2 | 1432 | if (res == 0) |
1da177e4 LT |
1433 | break; |
1434 | } | |
1435 | ||
e73aec82 MP |
1436 | if (res) { |
1437 | sd_print_result(sdkp, res); | |
1438 | if (driver_byte(res) & DRIVER_SENSE) | |
1439 | sd_print_sense_hdr(sdkp, &sshdr); | |
1da177e4 LT |
1440 | } |
1441 | ||
3721050a TH |
1442 | if (res) |
1443 | return -EIO; | |
1444 | return 0; | |
1da177e4 LT |
1445 | } |
1446 | ||
1da177e4 LT |
1447 | static void sd_rescan(struct device *dev) |
1448 | { | |
39b7f1e2 AS |
1449 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
1450 | ||
1451 | if (sdkp) { | |
f98a8cae | 1452 | revalidate_disk(sdkp->disk); |
39b7f1e2 AS |
1453 | scsi_disk_put(sdkp); |
1454 | } | |
1da177e4 LT |
1455 | } |
1456 | ||
1457 | ||
1458 | #ifdef CONFIG_COMPAT | |
1459 | /* | |
1460 | * This gets directly called from VFS. When the ioctl | |
1461 | * is not recognized we go back to the other translation paths. | |
1462 | */ | |
0338e291 AV |
1463 | static int sd_compat_ioctl(struct block_device *bdev, fmode_t mode, |
1464 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1465 | { |
0338e291 | 1466 | struct scsi_device *sdev = scsi_disk(bdev->bd_disk)->device; |
0bfc96cb PB |
1467 | int ret; |
1468 | ||
1469 | ret = scsi_verify_blk_ioctl(bdev, cmd); | |
1470 | if (ret < 0) | |
1471 | return ret; | |
1da177e4 LT |
1472 | |
1473 | /* | |
1474 | * If we are in the middle of error recovery, don't let anyone | |
1475 | * else try and use this device. Also, if error recovery fails, it | |
1476 | * may try and take the device offline, in which case all further | |
1477 | * access to the device is prohibited. | |
1478 | */ | |
1479 | if (!scsi_block_when_processing_errors(sdev)) | |
1480 | return -ENODEV; | |
1481 | ||
1482 | if (sdev->host->hostt->compat_ioctl) { | |
1da177e4 LT |
1483 | ret = sdev->host->hostt->compat_ioctl(sdev, cmd, (void __user *)arg); |
1484 | ||
1485 | return ret; | |
1486 | } | |
1487 | ||
1488 | /* | |
1489 | * Let the static ioctl translation table take care of it. | |
1490 | */ | |
1491 | return -ENOIOCTLCMD; | |
1492 | } | |
1493 | #endif | |
1494 | ||
83d5cde4 | 1495 | static const struct block_device_operations sd_fops = { |
1da177e4 | 1496 | .owner = THIS_MODULE, |
0338e291 AV |
1497 | .open = sd_open, |
1498 | .release = sd_release, | |
8a6cfeb6 | 1499 | .ioctl = sd_ioctl, |
a885c8c4 | 1500 | .getgeo = sd_getgeo, |
1da177e4 | 1501 | #ifdef CONFIG_COMPAT |
0338e291 | 1502 | .compat_ioctl = sd_compat_ioctl, |
1da177e4 | 1503 | #endif |
2bae0093 | 1504 | .check_events = sd_check_events, |
1da177e4 | 1505 | .revalidate_disk = sd_revalidate_disk, |
72ec24bd | 1506 | .unlock_native_capacity = sd_unlock_native_capacity, |
1da177e4 LT |
1507 | }; |
1508 | ||
18a4d0a2 MP |
1509 | /** |
1510 | * sd_eh_action - error handling callback | |
1511 | * @scmd: sd-issued command that has failed | |
1512 | * @eh_cmnd: The command that was sent during error handling | |
1513 | * @eh_cmnd_len: Length of eh_cmnd in bytes | |
1514 | * @eh_disp: The recovery disposition suggested by the midlayer | |
1515 | * | |
1516 | * This function is called by the SCSI midlayer upon completion of | |
1517 | * an error handling command (TEST UNIT READY, START STOP UNIT, | |
1518 | * etc.) The command sent to the device by the error handler is | |
1519 | * stored in eh_cmnd. The result of sending the eh command is | |
1520 | * passed in eh_disp. | |
1521 | **/ | |
1522 | static int sd_eh_action(struct scsi_cmnd *scmd, unsigned char *eh_cmnd, | |
1523 | int eh_cmnd_len, int eh_disp) | |
1524 | { | |
1525 | struct scsi_disk *sdkp = scsi_disk(scmd->request->rq_disk); | |
1526 | ||
1527 | if (!scsi_device_online(scmd->device) || | |
1528 | !scsi_medium_access_command(scmd)) | |
1529 | return eh_disp; | |
1530 | ||
1531 | /* | |
1532 | * The device has timed out executing a medium access command. | |
1533 | * However, the TEST UNIT READY command sent during error | |
1534 | * handling completed successfully. Either the device is in the | |
1535 | * process of recovering or has it suffered an internal failure | |
1536 | * that prevents access to the storage medium. | |
1537 | */ | |
1538 | if (host_byte(scmd->result) == DID_TIME_OUT && eh_disp == SUCCESS && | |
1539 | eh_cmnd_len && eh_cmnd[0] == TEST_UNIT_READY) | |
1540 | sdkp->medium_access_timed_out++; | |
1541 | ||
1542 | /* | |
1543 | * If the device keeps failing read/write commands but TEST UNIT | |
1544 | * READY always completes successfully we assume that medium | |
1545 | * access is no longer possible and take the device offline. | |
1546 | */ | |
1547 | if (sdkp->medium_access_timed_out >= sdkp->max_medium_access_timeouts) { | |
1548 | scmd_printk(KERN_ERR, scmd, | |
1549 | "Medium access timeout failure. Offlining disk!\n"); | |
1550 | scsi_device_set_state(scmd->device, SDEV_OFFLINE); | |
1551 | ||
1552 | return FAILED; | |
1553 | } | |
1554 | ||
1555 | return eh_disp; | |
1556 | } | |
1557 | ||
af55ff67 MP |
1558 | static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd) |
1559 | { | |
83096ebf TH |
1560 | u64 start_lba = blk_rq_pos(scmd->request); |
1561 | u64 end_lba = blk_rq_pos(scmd->request) + (scsi_bufflen(scmd) / 512); | |
af55ff67 MP |
1562 | u64 bad_lba; |
1563 | int info_valid; | |
a8733c7b JB |
1564 | /* |
1565 | * resid is optional but mostly filled in. When it's unused, | |
1566 | * its value is zero, so we assume the whole buffer transferred | |
1567 | */ | |
1568 | unsigned int transferred = scsi_bufflen(scmd) - scsi_get_resid(scmd); | |
1569 | unsigned int good_bytes; | |
af55ff67 | 1570 | |
33659ebb | 1571 | if (scmd->request->cmd_type != REQ_TYPE_FS) |
af55ff67 MP |
1572 | return 0; |
1573 | ||
1574 | info_valid = scsi_get_sense_info_fld(scmd->sense_buffer, | |
1575 | SCSI_SENSE_BUFFERSIZE, | |
1576 | &bad_lba); | |
1577 | if (!info_valid) | |
1578 | return 0; | |
1579 | ||
1580 | if (scsi_bufflen(scmd) <= scmd->device->sector_size) | |
1581 | return 0; | |
1582 | ||
1583 | if (scmd->device->sector_size < 512) { | |
1584 | /* only legitimate sector_size here is 256 */ | |
1585 | start_lba <<= 1; | |
1586 | end_lba <<= 1; | |
1587 | } else { | |
1588 | /* be careful ... don't want any overflows */ | |
1589 | u64 factor = scmd->device->sector_size / 512; | |
1590 | do_div(start_lba, factor); | |
1591 | do_div(end_lba, factor); | |
1592 | } | |
1593 | ||
1594 | /* The bad lba was reported incorrectly, we have no idea where | |
1595 | * the error is. | |
1596 | */ | |
1597 | if (bad_lba < start_lba || bad_lba >= end_lba) | |
1598 | return 0; | |
1599 | ||
1600 | /* This computation should always be done in terms of | |
1601 | * the resolution of the device's medium. | |
1602 | */ | |
a8733c7b JB |
1603 | good_bytes = (bad_lba - start_lba) * scmd->device->sector_size; |
1604 | return min(good_bytes, transferred); | |
af55ff67 MP |
1605 | } |
1606 | ||
1da177e4 | 1607 | /** |
7b3d9545 | 1608 | * sd_done - bottom half handler: called when the lower level |
1da177e4 LT |
1609 | * driver has completed (successfully or otherwise) a scsi command. |
1610 | * @SCpnt: mid-level's per command structure. | |
1611 | * | |
1612 | * Note: potentially run from within an ISR. Must not block. | |
1613 | **/ | |
7b3d9545 | 1614 | static int sd_done(struct scsi_cmnd *SCpnt) |
1da177e4 LT |
1615 | { |
1616 | int result = SCpnt->result; | |
af55ff67 | 1617 | unsigned int good_bytes = result ? 0 : scsi_bufflen(SCpnt); |
1da177e4 | 1618 | struct scsi_sense_hdr sshdr; |
4e7392ec | 1619 | struct scsi_disk *sdkp = scsi_disk(SCpnt->request->rq_disk); |
26e85fcd | 1620 | struct request *req = SCpnt->request; |
1da177e4 LT |
1621 | int sense_valid = 0; |
1622 | int sense_deferred = 0; | |
c98a0eb0 | 1623 | unsigned char op = SCpnt->cmnd[0]; |
5db44863 | 1624 | unsigned char unmap = SCpnt->cmnd[1] & 8; |
1da177e4 | 1625 | |
5db44863 | 1626 | if (req->cmd_flags & REQ_DISCARD || req->cmd_flags & REQ_WRITE_SAME) { |
26e85fcd MP |
1627 | if (!result) { |
1628 | good_bytes = blk_rq_bytes(req); | |
1629 | scsi_set_resid(SCpnt, 0); | |
1630 | } else { | |
1631 | good_bytes = 0; | |
1632 | scsi_set_resid(SCpnt, blk_rq_bytes(req)); | |
1633 | } | |
1634 | } | |
6a32a8ae | 1635 | |
1da177e4 LT |
1636 | if (result) { |
1637 | sense_valid = scsi_command_normalize_sense(SCpnt, &sshdr); | |
1638 | if (sense_valid) | |
1639 | sense_deferred = scsi_sense_is_deferred(&sshdr); | |
1640 | } | |
1da177e4 | 1641 | #ifdef CONFIG_SCSI_LOGGING |
fa0d34be | 1642 | SCSI_LOG_HLCOMPLETE(1, scsi_print_result(SCpnt)); |
1da177e4 | 1643 | if (sense_valid) { |
fa0d34be | 1644 | SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO, SCpnt, |
7b3d9545 | 1645 | "sd_done: sb[respc,sk,asc," |
fa0d34be MP |
1646 | "ascq]=%x,%x,%x,%x\n", |
1647 | sshdr.response_code, | |
1648 | sshdr.sense_key, sshdr.asc, | |
1649 | sshdr.ascq)); | |
1da177e4 LT |
1650 | } |
1651 | #endif | |
03aba2f7 LT |
1652 | if (driver_byte(result) != DRIVER_SENSE && |
1653 | (!sense_valid || sense_deferred)) | |
1654 | goto out; | |
1655 | ||
18a4d0a2 MP |
1656 | sdkp->medium_access_timed_out = 0; |
1657 | ||
03aba2f7 LT |
1658 | switch (sshdr.sense_key) { |
1659 | case HARDWARE_ERROR: | |
1660 | case MEDIUM_ERROR: | |
af55ff67 | 1661 | good_bytes = sd_completed_bytes(SCpnt); |
03aba2f7 LT |
1662 | break; |
1663 | case RECOVERED_ERROR: | |
af55ff67 MP |
1664 | good_bytes = scsi_bufflen(SCpnt); |
1665 | break; | |
10dab226 JW |
1666 | case NO_SENSE: |
1667 | /* This indicates a false check condition, so ignore it. An | |
1668 | * unknown amount of data was transferred so treat it as an | |
1669 | * error. | |
1670 | */ | |
1671 | scsi_print_sense("sd", SCpnt); | |
1672 | SCpnt->result = 0; | |
1673 | memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); | |
1674 | break; | |
c98a0eb0 MP |
1675 | case ABORTED_COMMAND: |
1676 | if (sshdr.asc == 0x10) /* DIF: Target detected corruption */ | |
1677 | good_bytes = sd_completed_bytes(SCpnt); | |
1678 | break; | |
1679 | case ILLEGAL_REQUEST: | |
1680 | if (sshdr.asc == 0x10) /* DIX: Host detected corruption */ | |
af55ff67 | 1681 | good_bytes = sd_completed_bytes(SCpnt); |
c98a0eb0 | 1682 | /* INVALID COMMAND OPCODE or INVALID FIELD IN CDB */ |
5db44863 MP |
1683 | if (sshdr.asc == 0x20 || sshdr.asc == 0x24) { |
1684 | switch (op) { | |
1685 | case UNMAP: | |
1686 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
1687 | break; | |
1688 | case WRITE_SAME_16: | |
1689 | case WRITE_SAME: | |
1690 | if (unmap) | |
1691 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
1692 | else { | |
1693 | sdkp->device->no_write_same = 1; | |
1694 | sd_config_write_same(sdkp); | |
1695 | ||
1696 | good_bytes = 0; | |
1697 | req->__data_len = blk_rq_bytes(req); | |
1698 | req->cmd_flags |= REQ_QUIET; | |
1699 | } | |
1700 | } | |
1701 | } | |
03aba2f7 LT |
1702 | break; |
1703 | default: | |
1704 | break; | |
1da177e4 | 1705 | } |
03aba2f7 | 1706 | out: |
af55ff67 MP |
1707 | if (rq_data_dir(SCpnt->request) == READ && scsi_prot_sg_count(SCpnt)) |
1708 | sd_dif_complete(SCpnt, good_bytes); | |
1709 | ||
4e7392ec | 1710 | if (scsi_host_dif_capable(sdkp->device->host, sdkp->protection_type) |
77c9cfc5 MP |
1711 | == SD_DIF_TYPE2_PROTECTION && SCpnt->cmnd != SCpnt->request->cmd) { |
1712 | ||
1713 | /* We have to print a failed command here as the | |
1714 | * extended CDB gets freed before scsi_io_completion() | |
1715 | * is called. | |
1716 | */ | |
1717 | if (result) | |
1718 | scsi_print_command(SCpnt); | |
1719 | ||
4e7392ec | 1720 | mempool_free(SCpnt->cmnd, sd_cdb_pool); |
77c9cfc5 MP |
1721 | SCpnt->cmnd = NULL; |
1722 | SCpnt->cmd_len = 0; | |
1723 | } | |
4e7392ec | 1724 | |
7b3d9545 | 1725 | return good_bytes; |
1da177e4 LT |
1726 | } |
1727 | ||
1da177e4 LT |
1728 | /* |
1729 | * spinup disk - called only in sd_revalidate_disk() | |
1730 | */ | |
1731 | static void | |
e73aec82 | 1732 | sd_spinup_disk(struct scsi_disk *sdkp) |
ea73a9f2 | 1733 | { |
1da177e4 | 1734 | unsigned char cmd[10]; |
4451e472 | 1735 | unsigned long spintime_expire = 0; |
1da177e4 LT |
1736 | int retries, spintime; |
1737 | unsigned int the_result; | |
1738 | struct scsi_sense_hdr sshdr; | |
1739 | int sense_valid = 0; | |
1740 | ||
1741 | spintime = 0; | |
1742 | ||
1743 | /* Spin up drives, as required. Only do this at boot time */ | |
1744 | /* Spinup needs to be done for module loads too. */ | |
1745 | do { | |
1746 | retries = 0; | |
1747 | ||
1748 | do { | |
1749 | cmd[0] = TEST_UNIT_READY; | |
1750 | memset((void *) &cmd[1], 0, 9); | |
1751 | ||
ea73a9f2 JB |
1752 | the_result = scsi_execute_req(sdkp->device, cmd, |
1753 | DMA_NONE, NULL, 0, | |
1754 | &sshdr, SD_TIMEOUT, | |
f4f4e47e | 1755 | SD_MAX_RETRIES, NULL); |
1da177e4 | 1756 | |
b4d38e38 AS |
1757 | /* |
1758 | * If the drive has indicated to us that it | |
1759 | * doesn't have any media in it, don't bother | |
1760 | * with any more polling. | |
1761 | */ | |
1762 | if (media_not_present(sdkp, &sshdr)) | |
1763 | return; | |
1764 | ||
1da177e4 | 1765 | if (the_result) |
ea73a9f2 | 1766 | sense_valid = scsi_sense_valid(&sshdr); |
1da177e4 LT |
1767 | retries++; |
1768 | } while (retries < 3 && | |
1769 | (!scsi_status_is_good(the_result) || | |
1770 | ((driver_byte(the_result) & DRIVER_SENSE) && | |
1771 | sense_valid && sshdr.sense_key == UNIT_ATTENTION))); | |
1772 | ||
1da177e4 LT |
1773 | if ((driver_byte(the_result) & DRIVER_SENSE) == 0) { |
1774 | /* no sense, TUR either succeeded or failed | |
1775 | * with a status error */ | |
e73aec82 MP |
1776 | if(!spintime && !scsi_status_is_good(the_result)) { |
1777 | sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n"); | |
1778 | sd_print_result(sdkp, the_result); | |
1779 | } | |
1da177e4 LT |
1780 | break; |
1781 | } | |
1782 | ||
1783 | /* | |
1784 | * The device does not want the automatic start to be issued. | |
1785 | */ | |
33dd6f92 | 1786 | if (sdkp->device->no_start_on_add) |
1da177e4 | 1787 | break; |
1da177e4 | 1788 | |
33dd6f92 MW |
1789 | if (sense_valid && sshdr.sense_key == NOT_READY) { |
1790 | if (sshdr.asc == 4 && sshdr.ascq == 3) | |
1791 | break; /* manual intervention required */ | |
1792 | if (sshdr.asc == 4 && sshdr.ascq == 0xb) | |
1793 | break; /* standby */ | |
1794 | if (sshdr.asc == 4 && sshdr.ascq == 0xc) | |
1795 | break; /* unavailable */ | |
1796 | /* | |
1797 | * Issue command to spin up drive when not ready | |
1798 | */ | |
1da177e4 | 1799 | if (!spintime) { |
e73aec82 | 1800 | sd_printk(KERN_NOTICE, sdkp, "Spinning up disk..."); |
1da177e4 LT |
1801 | cmd[0] = START_STOP; |
1802 | cmd[1] = 1; /* Return immediately */ | |
1803 | memset((void *) &cmd[2], 0, 8); | |
1804 | cmd[4] = 1; /* Start spin cycle */ | |
d2886ea3 SR |
1805 | if (sdkp->device->start_stop_pwr_cond) |
1806 | cmd[4] |= 1 << 4; | |
ea73a9f2 JB |
1807 | scsi_execute_req(sdkp->device, cmd, DMA_NONE, |
1808 | NULL, 0, &sshdr, | |
f4f4e47e FT |
1809 | SD_TIMEOUT, SD_MAX_RETRIES, |
1810 | NULL); | |
4451e472 AS |
1811 | spintime_expire = jiffies + 100 * HZ; |
1812 | spintime = 1; | |
1da177e4 | 1813 | } |
1da177e4 LT |
1814 | /* Wait 1 second for next try */ |
1815 | msleep(1000); | |
1816 | printk("."); | |
4451e472 AS |
1817 | |
1818 | /* | |
1819 | * Wait for USB flash devices with slow firmware. | |
1820 | * Yes, this sense key/ASC combination shouldn't | |
1821 | * occur here. It's characteristic of these devices. | |
1822 | */ | |
1823 | } else if (sense_valid && | |
1824 | sshdr.sense_key == UNIT_ATTENTION && | |
1825 | sshdr.asc == 0x28) { | |
1826 | if (!spintime) { | |
1827 | spintime_expire = jiffies + 5 * HZ; | |
1828 | spintime = 1; | |
1829 | } | |
1830 | /* Wait 1 second for next try */ | |
1831 | msleep(1000); | |
1da177e4 LT |
1832 | } else { |
1833 | /* we don't understand the sense code, so it's | |
1834 | * probably pointless to loop */ | |
1835 | if(!spintime) { | |
e73aec82 MP |
1836 | sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n"); |
1837 | sd_print_sense_hdr(sdkp, &sshdr); | |
1da177e4 LT |
1838 | } |
1839 | break; | |
1840 | } | |
1841 | ||
4451e472 | 1842 | } while (spintime && time_before_eq(jiffies, spintime_expire)); |
1da177e4 LT |
1843 | |
1844 | if (spintime) { | |
1845 | if (scsi_status_is_good(the_result)) | |
1846 | printk("ready\n"); | |
1847 | else | |
1848 | printk("not responding...\n"); | |
1849 | } | |
1850 | } | |
1851 | ||
e0597d70 MP |
1852 | |
1853 | /* | |
1854 | * Determine whether disk supports Data Integrity Field. | |
1855 | */ | |
fe542396 | 1856 | static int sd_read_protection_type(struct scsi_disk *sdkp, unsigned char *buffer) |
e0597d70 MP |
1857 | { |
1858 | struct scsi_device *sdp = sdkp->device; | |
1859 | u8 type; | |
fe542396 | 1860 | int ret = 0; |
e0597d70 MP |
1861 | |
1862 | if (scsi_device_protection(sdp) == 0 || (buffer[12] & 1) == 0) | |
fe542396 | 1863 | return ret; |
35e1a5d9 MP |
1864 | |
1865 | type = ((buffer[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */ | |
1866 | ||
fe542396 MP |
1867 | if (type > SD_DIF_TYPE3_PROTECTION) |
1868 | ret = -ENODEV; | |
1869 | else if (scsi_host_dif_capable(sdp->host, type)) | |
1870 | ret = 1; | |
1871 | ||
1872 | if (sdkp->first_scan || type != sdkp->protection_type) | |
1873 | switch (ret) { | |
1874 | case -ENODEV: | |
1875 | sd_printk(KERN_ERR, sdkp, "formatted with unsupported" \ | |
1876 | " protection type %u. Disabling disk!\n", | |
1877 | type); | |
1878 | break; | |
1879 | case 1: | |
1880 | sd_printk(KERN_NOTICE, sdkp, | |
1881 | "Enabling DIF Type %u protection\n", type); | |
1882 | break; | |
1883 | case 0: | |
1884 | sd_printk(KERN_NOTICE, sdkp, | |
1885 | "Disabling DIF Type %u protection\n", type); | |
1886 | break; | |
1887 | } | |
e0597d70 | 1888 | |
be922f47 MP |
1889 | sdkp->protection_type = type; |
1890 | ||
fe542396 | 1891 | return ret; |
e0597d70 MP |
1892 | } |
1893 | ||
0da205e0 MW |
1894 | static void read_capacity_error(struct scsi_disk *sdkp, struct scsi_device *sdp, |
1895 | struct scsi_sense_hdr *sshdr, int sense_valid, | |
1896 | int the_result) | |
1897 | { | |
1898 | sd_print_result(sdkp, the_result); | |
1899 | if (driver_byte(the_result) & DRIVER_SENSE) | |
1900 | sd_print_sense_hdr(sdkp, sshdr); | |
1901 | else | |
1902 | sd_printk(KERN_NOTICE, sdkp, "Sense not available.\n"); | |
1903 | ||
1904 | /* | |
1905 | * Set dirty bit for removable devices if not ready - | |
1906 | * sometimes drives will not report this properly. | |
1907 | */ | |
1908 | if (sdp->removable && | |
1909 | sense_valid && sshdr->sense_key == NOT_READY) | |
2bae0093 | 1910 | set_media_not_present(sdkp); |
0da205e0 MW |
1911 | |
1912 | /* | |
1913 | * We used to set media_present to 0 here to indicate no media | |
1914 | * in the drive, but some drives fail read capacity even with | |
1915 | * media present, so we can't do that. | |
1916 | */ | |
1917 | sdkp->capacity = 0; /* unknown mapped to zero - as usual */ | |
1918 | } | |
1919 | ||
1920 | #define RC16_LEN 32 | |
1921 | #if RC16_LEN > SD_BUF_SIZE | |
1922 | #error RC16_LEN must not be more than SD_BUF_SIZE | |
1923 | #endif | |
1924 | ||
3233ac19 JB |
1925 | #define READ_CAPACITY_RETRIES_ON_RESET 10 |
1926 | ||
0da205e0 MW |
1927 | static int read_capacity_16(struct scsi_disk *sdkp, struct scsi_device *sdp, |
1928 | unsigned char *buffer) | |
ea73a9f2 | 1929 | { |
1da177e4 | 1930 | unsigned char cmd[16]; |
1da177e4 LT |
1931 | struct scsi_sense_hdr sshdr; |
1932 | int sense_valid = 0; | |
0da205e0 | 1933 | int the_result; |
3233ac19 | 1934 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
ea09bcc9 | 1935 | unsigned int alignment; |
0da205e0 MW |
1936 | unsigned long long lba; |
1937 | unsigned sector_size; | |
1da177e4 | 1938 | |
5ce524bd HG |
1939 | if (sdp->no_read_capacity_16) |
1940 | return -EINVAL; | |
1941 | ||
1da177e4 | 1942 | do { |
0da205e0 MW |
1943 | memset(cmd, 0, 16); |
1944 | cmd[0] = SERVICE_ACTION_IN; | |
1945 | cmd[1] = SAI_READ_CAPACITY_16; | |
1946 | cmd[13] = RC16_LEN; | |
1947 | memset(buffer, 0, RC16_LEN); | |
1948 | ||
ea73a9f2 | 1949 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, |
0da205e0 MW |
1950 | buffer, RC16_LEN, &sshdr, |
1951 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
1da177e4 | 1952 | |
ea73a9f2 | 1953 | if (media_not_present(sdkp, &sshdr)) |
0da205e0 | 1954 | return -ENODEV; |
1da177e4 | 1955 | |
2b301307 | 1956 | if (the_result) { |
ea73a9f2 | 1957 | sense_valid = scsi_sense_valid(&sshdr); |
2b301307 MW |
1958 | if (sense_valid && |
1959 | sshdr.sense_key == ILLEGAL_REQUEST && | |
1960 | (sshdr.asc == 0x20 || sshdr.asc == 0x24) && | |
1961 | sshdr.ascq == 0x00) | |
1962 | /* Invalid Command Operation Code or | |
1963 | * Invalid Field in CDB, just retry | |
1964 | * silently with RC10 */ | |
1965 | return -EINVAL; | |
3233ac19 JB |
1966 | if (sense_valid && |
1967 | sshdr.sense_key == UNIT_ATTENTION && | |
1968 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) | |
1969 | /* Device reset might occur several times, | |
1970 | * give it one more chance */ | |
1971 | if (--reset_retries > 0) | |
1972 | continue; | |
2b301307 | 1973 | } |
1da177e4 LT |
1974 | retries--; |
1975 | ||
1976 | } while (the_result && retries); | |
1977 | ||
0da205e0 | 1978 | if (the_result) { |
e73aec82 | 1979 | sd_printk(KERN_NOTICE, sdkp, "READ CAPACITY(16) failed\n"); |
0da205e0 MW |
1980 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); |
1981 | return -EINVAL; | |
1982 | } | |
e73aec82 | 1983 | |
8f76d151 DH |
1984 | sector_size = get_unaligned_be32(&buffer[8]); |
1985 | lba = get_unaligned_be64(&buffer[0]); | |
0da205e0 | 1986 | |
fe542396 MP |
1987 | if (sd_read_protection_type(sdkp, buffer) < 0) { |
1988 | sdkp->capacity = 0; | |
1989 | return -ENODEV; | |
1990 | } | |
0da205e0 MW |
1991 | |
1992 | if ((sizeof(sdkp->capacity) == 4) && (lba >= 0xffffffffULL)) { | |
1993 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a " | |
1994 | "kernel compiled with support for large block " | |
1995 | "devices.\n"); | |
1996 | sdkp->capacity = 0; | |
1997 | return -EOVERFLOW; | |
1998 | } | |
1999 | ||
ea09bcc9 | 2000 | /* Logical blocks per physical block exponent */ |
526f7c79 | 2001 | sdkp->physical_block_size = (1 << (buffer[13] & 0xf)) * sector_size; |
ea09bcc9 MP |
2002 | |
2003 | /* Lowest aligned logical block */ | |
2004 | alignment = ((buffer[14] & 0x3f) << 8 | buffer[15]) * sector_size; | |
2005 | blk_queue_alignment_offset(sdp->request_queue, alignment); | |
2006 | if (alignment && sdkp->first_scan) | |
2007 | sd_printk(KERN_NOTICE, sdkp, | |
2008 | "physical block alignment offset: %u\n", alignment); | |
2009 | ||
c98a0eb0 MP |
2010 | if (buffer[14] & 0x80) { /* LBPME */ |
2011 | sdkp->lbpme = 1; | |
e339c1a7 | 2012 | |
c98a0eb0 MP |
2013 | if (buffer[14] & 0x40) /* LBPRZ */ |
2014 | sdkp->lbprz = 1; | |
e339c1a7 | 2015 | |
c98a0eb0 | 2016 | sd_config_discard(sdkp, SD_LBP_WS16); |
e339c1a7 MP |
2017 | } |
2018 | ||
0da205e0 MW |
2019 | sdkp->capacity = lba + 1; |
2020 | return sector_size; | |
2021 | } | |
2022 | ||
2023 | static int read_capacity_10(struct scsi_disk *sdkp, struct scsi_device *sdp, | |
2024 | unsigned char *buffer) | |
2025 | { | |
2026 | unsigned char cmd[16]; | |
2027 | struct scsi_sense_hdr sshdr; | |
2028 | int sense_valid = 0; | |
2029 | int the_result; | |
3233ac19 | 2030 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
0da205e0 MW |
2031 | sector_t lba; |
2032 | unsigned sector_size; | |
2033 | ||
2034 | do { | |
2035 | cmd[0] = READ_CAPACITY; | |
2036 | memset(&cmd[1], 0, 9); | |
2037 | memset(buffer, 0, 8); | |
2038 | ||
2039 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, | |
2040 | buffer, 8, &sshdr, | |
2041 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
2042 | ||
2043 | if (media_not_present(sdkp, &sshdr)) | |
2044 | return -ENODEV; | |
2045 | ||
3233ac19 | 2046 | if (the_result) { |
0da205e0 | 2047 | sense_valid = scsi_sense_valid(&sshdr); |
3233ac19 JB |
2048 | if (sense_valid && |
2049 | sshdr.sense_key == UNIT_ATTENTION && | |
2050 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) | |
2051 | /* Device reset might occur several times, | |
2052 | * give it one more chance */ | |
2053 | if (--reset_retries > 0) | |
2054 | continue; | |
2055 | } | |
0da205e0 MW |
2056 | retries--; |
2057 | ||
2058 | } while (the_result && retries); | |
2059 | ||
2060 | if (the_result) { | |
2061 | sd_printk(KERN_NOTICE, sdkp, "READ CAPACITY failed\n"); | |
2062 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); | |
2063 | return -EINVAL; | |
2064 | } | |
2065 | ||
8f76d151 DH |
2066 | sector_size = get_unaligned_be32(&buffer[4]); |
2067 | lba = get_unaligned_be32(&buffer[0]); | |
0da205e0 | 2068 | |
5ce524bd HG |
2069 | if (sdp->no_read_capacity_16 && (lba == 0xffffffff)) { |
2070 | /* Some buggy (usb cardreader) devices return an lba of | |
2071 | 0xffffffff when the want to report a size of 0 (with | |
2072 | which they really mean no media is present) */ | |
2073 | sdkp->capacity = 0; | |
5cc10350 | 2074 | sdkp->physical_block_size = sector_size; |
5ce524bd HG |
2075 | return sector_size; |
2076 | } | |
2077 | ||
0da205e0 MW |
2078 | if ((sizeof(sdkp->capacity) == 4) && (lba == 0xffffffff)) { |
2079 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a " | |
2080 | "kernel compiled with support for large block " | |
2081 | "devices.\n"); | |
2082 | sdkp->capacity = 0; | |
2083 | return -EOVERFLOW; | |
2084 | } | |
2085 | ||
2086 | sdkp->capacity = lba + 1; | |
526f7c79 | 2087 | sdkp->physical_block_size = sector_size; |
0da205e0 MW |
2088 | return sector_size; |
2089 | } | |
2090 | ||
2b301307 MW |
2091 | static int sd_try_rc16_first(struct scsi_device *sdp) |
2092 | { | |
f87146bb HR |
2093 | if (sdp->host->max_cmd_len < 16) |
2094 | return 0; | |
6a0bdffa AS |
2095 | if (sdp->try_rc_10_first) |
2096 | return 0; | |
2b301307 MW |
2097 | if (sdp->scsi_level > SCSI_SPC_2) |
2098 | return 1; | |
2099 | if (scsi_device_protection(sdp)) | |
2100 | return 1; | |
2101 | return 0; | |
2102 | } | |
2103 | ||
0da205e0 MW |
2104 | /* |
2105 | * read disk capacity | |
2106 | */ | |
2107 | static void | |
2108 | sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer) | |
2109 | { | |
2110 | int sector_size; | |
2111 | struct scsi_device *sdp = sdkp->device; | |
70a9b873 | 2112 | sector_t old_capacity = sdkp->capacity; |
0da205e0 | 2113 | |
2b301307 | 2114 | if (sd_try_rc16_first(sdp)) { |
0da205e0 MW |
2115 | sector_size = read_capacity_16(sdkp, sdp, buffer); |
2116 | if (sector_size == -EOVERFLOW) | |
1da177e4 | 2117 | goto got_data; |
2b301307 MW |
2118 | if (sector_size == -ENODEV) |
2119 | return; | |
2120 | if (sector_size < 0) | |
2121 | sector_size = read_capacity_10(sdkp, sdp, buffer); | |
0da205e0 MW |
2122 | if (sector_size < 0) |
2123 | return; | |
1da177e4 | 2124 | } else { |
0da205e0 MW |
2125 | sector_size = read_capacity_10(sdkp, sdp, buffer); |
2126 | if (sector_size == -EOVERFLOW) | |
2127 | goto got_data; | |
2128 | if (sector_size < 0) | |
2129 | return; | |
2130 | if ((sizeof(sdkp->capacity) > 4) && | |
2131 | (sdkp->capacity > 0xffffffffULL)) { | |
2132 | int old_sector_size = sector_size; | |
2133 | sd_printk(KERN_NOTICE, sdkp, "Very big device. " | |
2134 | "Trying to use READ CAPACITY(16).\n"); | |
2135 | sector_size = read_capacity_16(sdkp, sdp, buffer); | |
2136 | if (sector_size < 0) { | |
2137 | sd_printk(KERN_NOTICE, sdkp, | |
2138 | "Using 0xffffffff as device size\n"); | |
2139 | sdkp->capacity = 1 + (sector_t) 0xffffffff; | |
2140 | sector_size = old_sector_size; | |
2141 | goto got_data; | |
2142 | } | |
2143 | } | |
2144 | } | |
1da177e4 | 2145 | |
5c211caa AS |
2146 | /* Some devices are known to return the total number of blocks, |
2147 | * not the highest block number. Some devices have versions | |
2148 | * which do this and others which do not. Some devices we might | |
2149 | * suspect of doing this but we don't know for certain. | |
2150 | * | |
2151 | * If we know the reported capacity is wrong, decrement it. If | |
2152 | * we can only guess, then assume the number of blocks is even | |
2153 | * (usually true but not always) and err on the side of lowering | |
2154 | * the capacity. | |
2155 | */ | |
2156 | if (sdp->fix_capacity || | |
2157 | (sdp->guess_capacity && (sdkp->capacity & 0x01))) { | |
2158 | sd_printk(KERN_INFO, sdkp, "Adjusting the sector count " | |
2159 | "from its reported value: %llu\n", | |
2160 | (unsigned long long) sdkp->capacity); | |
1da177e4 | 2161 | --sdkp->capacity; |
61bf54b7 ON |
2162 | } |
2163 | ||
1da177e4 LT |
2164 | got_data: |
2165 | if (sector_size == 0) { | |
2166 | sector_size = 512; | |
e73aec82 MP |
2167 | sd_printk(KERN_NOTICE, sdkp, "Sector size 0 reported, " |
2168 | "assuming 512.\n"); | |
1da177e4 LT |
2169 | } |
2170 | ||
2171 | if (sector_size != 512 && | |
2172 | sector_size != 1024 && | |
2173 | sector_size != 2048 && | |
2174 | sector_size != 4096 && | |
2175 | sector_size != 256) { | |
e73aec82 MP |
2176 | sd_printk(KERN_NOTICE, sdkp, "Unsupported sector size %d.\n", |
2177 | sector_size); | |
1da177e4 LT |
2178 | /* |
2179 | * The user might want to re-format the drive with | |
2180 | * a supported sectorsize. Once this happens, it | |
2181 | * would be relatively trivial to set the thing up. | |
2182 | * For this reason, we leave the thing in the table. | |
2183 | */ | |
2184 | sdkp->capacity = 0; | |
2185 | /* | |
2186 | * set a bogus sector size so the normal read/write | |
2187 | * logic in the block layer will eventually refuse any | |
2188 | * request on this device without tripping over power | |
2189 | * of two sector size assumptions | |
2190 | */ | |
2191 | sector_size = 512; | |
2192 | } | |
e1defc4f | 2193 | blk_queue_logical_block_size(sdp->request_queue, sector_size); |
7404ad3b | 2194 | |
1da177e4 | 2195 | { |
7404ad3b | 2196 | char cap_str_2[10], cap_str_10[10]; |
520a2c27 | 2197 | u64 sz = (u64)sdkp->capacity << ilog2(sector_size); |
1da177e4 | 2198 | |
7404ad3b JB |
2199 | string_get_size(sz, STRING_UNITS_2, cap_str_2, |
2200 | sizeof(cap_str_2)); | |
2201 | string_get_size(sz, STRING_UNITS_10, cap_str_10, | |
2202 | sizeof(cap_str_10)); | |
1da177e4 | 2203 | |
ea09bcc9 | 2204 | if (sdkp->first_scan || old_capacity != sdkp->capacity) { |
70a9b873 | 2205 | sd_printk(KERN_NOTICE, sdkp, |
ea09bcc9 | 2206 | "%llu %d-byte logical blocks: (%s/%s)\n", |
70a9b873 MP |
2207 | (unsigned long long)sdkp->capacity, |
2208 | sector_size, cap_str_10, cap_str_2); | |
ea09bcc9 | 2209 | |
526f7c79 | 2210 | if (sdkp->physical_block_size != sector_size) |
ea09bcc9 MP |
2211 | sd_printk(KERN_NOTICE, sdkp, |
2212 | "%u-byte physical blocks\n", | |
526f7c79 | 2213 | sdkp->physical_block_size); |
ea09bcc9 | 2214 | } |
1da177e4 LT |
2215 | } |
2216 | ||
53ad570b JH |
2217 | sdp->use_16_for_rw = (sdkp->capacity > 0xffffffff); |
2218 | ||
1da177e4 LT |
2219 | /* Rescale capacity to 512-byte units */ |
2220 | if (sector_size == 4096) | |
2221 | sdkp->capacity <<= 3; | |
2222 | else if (sector_size == 2048) | |
2223 | sdkp->capacity <<= 2; | |
2224 | else if (sector_size == 1024) | |
2225 | sdkp->capacity <<= 1; | |
2226 | else if (sector_size == 256) | |
2227 | sdkp->capacity >>= 1; | |
2228 | ||
526f7c79 MP |
2229 | blk_queue_physical_block_size(sdp->request_queue, |
2230 | sdkp->physical_block_size); | |
1da177e4 LT |
2231 | sdkp->device->sector_size = sector_size; |
2232 | } | |
2233 | ||
2234 | /* called with buffer of length 512 */ | |
2235 | static inline int | |
ea73a9f2 JB |
2236 | sd_do_mode_sense(struct scsi_device *sdp, int dbd, int modepage, |
2237 | unsigned char *buffer, int len, struct scsi_mode_data *data, | |
2238 | struct scsi_sense_hdr *sshdr) | |
1da177e4 | 2239 | { |
ea73a9f2 | 2240 | return scsi_mode_sense(sdp, dbd, modepage, buffer, len, |
1cf72699 | 2241 | SD_TIMEOUT, SD_MAX_RETRIES, data, |
ea73a9f2 | 2242 | sshdr); |
1da177e4 LT |
2243 | } |
2244 | ||
2245 | /* | |
2246 | * read write protect setting, if possible - called only in sd_revalidate_disk() | |
48970800 | 2247 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
2248 | */ |
2249 | static void | |
e73aec82 | 2250 | sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer) |
ea73a9f2 | 2251 | { |
1da177e4 | 2252 | int res; |
ea73a9f2 | 2253 | struct scsi_device *sdp = sdkp->device; |
1da177e4 | 2254 | struct scsi_mode_data data; |
70a9b873 | 2255 | int old_wp = sdkp->write_prot; |
1da177e4 LT |
2256 | |
2257 | set_disk_ro(sdkp->disk, 0); | |
ea73a9f2 | 2258 | if (sdp->skip_ms_page_3f) { |
e73aec82 | 2259 | sd_printk(KERN_NOTICE, sdkp, "Assuming Write Enabled\n"); |
1da177e4 LT |
2260 | return; |
2261 | } | |
2262 | ||
ea73a9f2 JB |
2263 | if (sdp->use_192_bytes_for_3f) { |
2264 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 192, &data, NULL); | |
1da177e4 LT |
2265 | } else { |
2266 | /* | |
2267 | * First attempt: ask for all pages (0x3F), but only 4 bytes. | |
2268 | * We have to start carefully: some devices hang if we ask | |
2269 | * for more than is available. | |
2270 | */ | |
ea73a9f2 | 2271 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 4, &data, NULL); |
1da177e4 LT |
2272 | |
2273 | /* | |
2274 | * Second attempt: ask for page 0 When only page 0 is | |
2275 | * implemented, a request for page 3F may return Sense Key | |
2276 | * 5: Illegal Request, Sense Code 24: Invalid field in | |
2277 | * CDB. | |
2278 | */ | |
2279 | if (!scsi_status_is_good(res)) | |
ea73a9f2 | 2280 | res = sd_do_mode_sense(sdp, 0, 0, buffer, 4, &data, NULL); |
1da177e4 LT |
2281 | |
2282 | /* | |
2283 | * Third attempt: ask 255 bytes, as we did earlier. | |
2284 | */ | |
2285 | if (!scsi_status_is_good(res)) | |
ea73a9f2 JB |
2286 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 255, |
2287 | &data, NULL); | |
1da177e4 LT |
2288 | } |
2289 | ||
2290 | if (!scsi_status_is_good(res)) { | |
e73aec82 MP |
2291 | sd_printk(KERN_WARNING, sdkp, |
2292 | "Test WP failed, assume Write Enabled\n"); | |
1da177e4 LT |
2293 | } else { |
2294 | sdkp->write_prot = ((data.device_specific & 0x80) != 0); | |
2295 | set_disk_ro(sdkp->disk, sdkp->write_prot); | |
70a9b873 MP |
2296 | if (sdkp->first_scan || old_wp != sdkp->write_prot) { |
2297 | sd_printk(KERN_NOTICE, sdkp, "Write Protect is %s\n", | |
2298 | sdkp->write_prot ? "on" : "off"); | |
2299 | sd_printk(KERN_DEBUG, sdkp, | |
2300 | "Mode Sense: %02x %02x %02x %02x\n", | |
2301 | buffer[0], buffer[1], buffer[2], buffer[3]); | |
2302 | } | |
1da177e4 LT |
2303 | } |
2304 | } | |
2305 | ||
2306 | /* | |
2307 | * sd_read_cache_type - called only from sd_revalidate_disk() | |
48970800 | 2308 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
2309 | */ |
2310 | static void | |
e73aec82 | 2311 | sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer) |
631e8a13 | 2312 | { |
1da177e4 | 2313 | int len = 0, res; |
ea73a9f2 | 2314 | struct scsi_device *sdp = sdkp->device; |
1da177e4 | 2315 | |
631e8a13 AV |
2316 | int dbd; |
2317 | int modepage; | |
0bcaa111 | 2318 | int first_len; |
1da177e4 LT |
2319 | struct scsi_mode_data data; |
2320 | struct scsi_sense_hdr sshdr; | |
70a9b873 MP |
2321 | int old_wce = sdkp->WCE; |
2322 | int old_rcd = sdkp->RCD; | |
2323 | int old_dpofua = sdkp->DPOFUA; | |
1da177e4 | 2324 | |
39c60a09 JB |
2325 | |
2326 | if (sdkp->cache_override) | |
2327 | return; | |
2328 | ||
0bcaa111 LT |
2329 | first_len = 4; |
2330 | if (sdp->skip_ms_page_8) { | |
2331 | if (sdp->type == TYPE_RBC) | |
2332 | goto defaults; | |
2333 | else { | |
2334 | if (sdp->skip_ms_page_3f) | |
2335 | goto defaults; | |
2336 | modepage = 0x3F; | |
2337 | if (sdp->use_192_bytes_for_3f) | |
2338 | first_len = 192; | |
2339 | dbd = 0; | |
2340 | } | |
2341 | } else if (sdp->type == TYPE_RBC) { | |
631e8a13 AV |
2342 | modepage = 6; |
2343 | dbd = 8; | |
2344 | } else { | |
2345 | modepage = 8; | |
2346 | dbd = 0; | |
2347 | } | |
2348 | ||
1da177e4 | 2349 | /* cautiously ask */ |
0bcaa111 LT |
2350 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, first_len, |
2351 | &data, &sshdr); | |
1da177e4 LT |
2352 | |
2353 | if (!scsi_status_is_good(res)) | |
2354 | goto bad_sense; | |
2355 | ||
6d73c851 AV |
2356 | if (!data.header_length) { |
2357 | modepage = 6; | |
0bcaa111 | 2358 | first_len = 0; |
e73aec82 | 2359 | sd_printk(KERN_ERR, sdkp, "Missing header in MODE_SENSE response\n"); |
6d73c851 AV |
2360 | } |
2361 | ||
1da177e4 LT |
2362 | /* that went OK, now ask for the proper length */ |
2363 | len = data.length; | |
2364 | ||
2365 | /* | |
2366 | * We're only interested in the first three bytes, actually. | |
2367 | * But the data cache page is defined for the first 20. | |
2368 | */ | |
2369 | if (len < 3) | |
2370 | goto bad_sense; | |
0bcaa111 LT |
2371 | else if (len > SD_BUF_SIZE) { |
2372 | sd_printk(KERN_NOTICE, sdkp, "Truncating mode parameter " | |
2373 | "data from %d to %d bytes\n", len, SD_BUF_SIZE); | |
2374 | len = SD_BUF_SIZE; | |
2375 | } | |
2376 | if (modepage == 0x3F && sdp->use_192_bytes_for_3f) | |
2377 | len = 192; | |
1da177e4 LT |
2378 | |
2379 | /* Get the data */ | |
0bcaa111 LT |
2380 | if (len > first_len) |
2381 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, len, | |
2382 | &data, &sshdr); | |
1da177e4 LT |
2383 | |
2384 | if (scsi_status_is_good(res)) { | |
631e8a13 | 2385 | int offset = data.header_length + data.block_descriptor_length; |
1da177e4 | 2386 | |
0bcaa111 LT |
2387 | while (offset < len) { |
2388 | u8 page_code = buffer[offset] & 0x3F; | |
2389 | u8 spf = buffer[offset] & 0x40; | |
2390 | ||
2391 | if (page_code == 8 || page_code == 6) { | |
2392 | /* We're interested only in the first 3 bytes. | |
2393 | */ | |
2394 | if (len - offset <= 2) { | |
2395 | sd_printk(KERN_ERR, sdkp, "Incomplete " | |
2396 | "mode parameter data\n"); | |
2397 | goto defaults; | |
2398 | } else { | |
2399 | modepage = page_code; | |
2400 | goto Page_found; | |
2401 | } | |
2402 | } else { | |
2403 | /* Go to the next page */ | |
2404 | if (spf && len - offset > 3) | |
2405 | offset += 4 + (buffer[offset+2] << 8) + | |
2406 | buffer[offset+3]; | |
2407 | else if (!spf && len - offset > 1) | |
2408 | offset += 2 + buffer[offset+1]; | |
2409 | else { | |
2410 | sd_printk(KERN_ERR, sdkp, "Incomplete " | |
2411 | "mode parameter data\n"); | |
2412 | goto defaults; | |
2413 | } | |
2414 | } | |
48970800 AV |
2415 | } |
2416 | ||
0bcaa111 LT |
2417 | if (modepage == 0x3F) { |
2418 | sd_printk(KERN_ERR, sdkp, "No Caching mode page " | |
2419 | "present\n"); | |
2420 | goto defaults; | |
2421 | } else if ((buffer[offset] & 0x3f) != modepage) { | |
e73aec82 | 2422 | sd_printk(KERN_ERR, sdkp, "Got wrong page\n"); |
631e8a13 AV |
2423 | goto defaults; |
2424 | } | |
0bcaa111 | 2425 | Page_found: |
631e8a13 AV |
2426 | if (modepage == 8) { |
2427 | sdkp->WCE = ((buffer[offset + 2] & 0x04) != 0); | |
2428 | sdkp->RCD = ((buffer[offset + 2] & 0x01) != 0); | |
2429 | } else { | |
2430 | sdkp->WCE = ((buffer[offset + 2] & 0x01) == 0); | |
2431 | sdkp->RCD = 0; | |
2432 | } | |
1da177e4 | 2433 | |
007365ad TH |
2434 | sdkp->DPOFUA = (data.device_specific & 0x10) != 0; |
2435 | if (sdkp->DPOFUA && !sdkp->device->use_10_for_rw) { | |
e73aec82 MP |
2436 | sd_printk(KERN_NOTICE, sdkp, |
2437 | "Uses READ/WRITE(6), disabling FUA\n"); | |
007365ad TH |
2438 | sdkp->DPOFUA = 0; |
2439 | } | |
2440 | ||
70a9b873 MP |
2441 | if (sdkp->first_scan || old_wce != sdkp->WCE || |
2442 | old_rcd != sdkp->RCD || old_dpofua != sdkp->DPOFUA) | |
2443 | sd_printk(KERN_NOTICE, sdkp, | |
2444 | "Write cache: %s, read cache: %s, %s\n", | |
2445 | sdkp->WCE ? "enabled" : "disabled", | |
2446 | sdkp->RCD ? "disabled" : "enabled", | |
2447 | sdkp->DPOFUA ? "supports DPO and FUA" | |
2448 | : "doesn't support DPO or FUA"); | |
1da177e4 LT |
2449 | |
2450 | return; | |
2451 | } | |
2452 | ||
2453 | bad_sense: | |
ea73a9f2 | 2454 | if (scsi_sense_valid(&sshdr) && |
1da177e4 LT |
2455 | sshdr.sense_key == ILLEGAL_REQUEST && |
2456 | sshdr.asc == 0x24 && sshdr.ascq == 0x0) | |
e73aec82 MP |
2457 | /* Invalid field in CDB */ |
2458 | sd_printk(KERN_NOTICE, sdkp, "Cache data unavailable\n"); | |
1da177e4 | 2459 | else |
e73aec82 | 2460 | sd_printk(KERN_ERR, sdkp, "Asking for cache data failed\n"); |
1da177e4 LT |
2461 | |
2462 | defaults: | |
b81478d8 NJ |
2463 | if (sdp->wce_default_on) { |
2464 | sd_printk(KERN_NOTICE, sdkp, "Assuming drive cache: write back\n"); | |
2465 | sdkp->WCE = 1; | |
2466 | } else { | |
2467 | sd_printk(KERN_ERR, sdkp, "Assuming drive cache: write through\n"); | |
2468 | sdkp->WCE = 0; | |
2469 | } | |
1da177e4 | 2470 | sdkp->RCD = 0; |
48970800 | 2471 | sdkp->DPOFUA = 0; |
1da177e4 LT |
2472 | } |
2473 | ||
e0597d70 MP |
2474 | /* |
2475 | * The ATO bit indicates whether the DIF application tag is available | |
2476 | * for use by the operating system. | |
2477 | */ | |
439d77f7 | 2478 | static void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer) |
e0597d70 MP |
2479 | { |
2480 | int res, offset; | |
2481 | struct scsi_device *sdp = sdkp->device; | |
2482 | struct scsi_mode_data data; | |
2483 | struct scsi_sense_hdr sshdr; | |
2484 | ||
2485 | if (sdp->type != TYPE_DISK) | |
2486 | return; | |
2487 | ||
2488 | if (sdkp->protection_type == 0) | |
2489 | return; | |
2490 | ||
2491 | res = scsi_mode_sense(sdp, 1, 0x0a, buffer, 36, SD_TIMEOUT, | |
2492 | SD_MAX_RETRIES, &data, &sshdr); | |
2493 | ||
2494 | if (!scsi_status_is_good(res) || !data.header_length || | |
2495 | data.length < 6) { | |
2496 | sd_printk(KERN_WARNING, sdkp, | |
2497 | "getting Control mode page failed, assume no ATO\n"); | |
2498 | ||
2499 | if (scsi_sense_valid(&sshdr)) | |
2500 | sd_print_sense_hdr(sdkp, &sshdr); | |
2501 | ||
2502 | return; | |
2503 | } | |
2504 | ||
2505 | offset = data.header_length + data.block_descriptor_length; | |
2506 | ||
2507 | if ((buffer[offset] & 0x3f) != 0x0a) { | |
2508 | sd_printk(KERN_ERR, sdkp, "ATO Got wrong page\n"); | |
2509 | return; | |
2510 | } | |
2511 | ||
2512 | if ((buffer[offset + 5] & 0x80) == 0) | |
2513 | return; | |
2514 | ||
2515 | sdkp->ATO = 1; | |
2516 | ||
2517 | return; | |
2518 | } | |
2519 | ||
d11b6916 MP |
2520 | /** |
2521 | * sd_read_block_limits - Query disk device for preferred I/O sizes. | |
2522 | * @disk: disk to query | |
2523 | */ | |
2524 | static void sd_read_block_limits(struct scsi_disk *sdkp) | |
2525 | { | |
2526 | unsigned int sector_sz = sdkp->device->sector_size; | |
bb2d3de1 | 2527 | const int vpd_len = 64; |
e3deec09 | 2528 | unsigned char *buffer = kmalloc(vpd_len, GFP_KERNEL); |
d11b6916 | 2529 | |
e3deec09 JB |
2530 | if (!buffer || |
2531 | /* Block Limits VPD */ | |
2532 | scsi_get_vpd_page(sdkp->device, 0xb0, buffer, vpd_len)) | |
2533 | goto out; | |
d11b6916 MP |
2534 | |
2535 | blk_queue_io_min(sdkp->disk->queue, | |
2536 | get_unaligned_be16(&buffer[6]) * sector_sz); | |
2537 | blk_queue_io_opt(sdkp->disk->queue, | |
2538 | get_unaligned_be32(&buffer[12]) * sector_sz); | |
2539 | ||
c98a0eb0 MP |
2540 | if (buffer[3] == 0x3c) { |
2541 | unsigned int lba_count, desc_count; | |
e339c1a7 | 2542 | |
5db44863 | 2543 | sdkp->max_ws_blocks = (u32)get_unaligned_be64(&buffer[36]); |
e339c1a7 | 2544 | |
c98a0eb0 | 2545 | if (!sdkp->lbpme) |
045d3fe7 | 2546 | goto out; |
045d3fe7 | 2547 | |
c98a0eb0 MP |
2548 | lba_count = get_unaligned_be32(&buffer[20]); |
2549 | desc_count = get_unaligned_be32(&buffer[24]); | |
045d3fe7 | 2550 | |
c98a0eb0 MP |
2551 | if (lba_count && desc_count) |
2552 | sdkp->max_unmap_blocks = lba_count; | |
e339c1a7 | 2553 | |
c98a0eb0 | 2554 | sdkp->unmap_granularity = get_unaligned_be32(&buffer[28]); |
e339c1a7 MP |
2555 | |
2556 | if (buffer[32] & 0x80) | |
c98a0eb0 | 2557 | sdkp->unmap_alignment = |
e339c1a7 | 2558 | get_unaligned_be32(&buffer[32]) & ~(1 << 31); |
c98a0eb0 MP |
2559 | |
2560 | if (!sdkp->lbpvpd) { /* LBP VPD page not provided */ | |
2561 | ||
2562 | if (sdkp->max_unmap_blocks) | |
2563 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
2564 | else | |
2565 | sd_config_discard(sdkp, SD_LBP_WS16); | |
2566 | ||
2567 | } else { /* LBP VPD page tells us what to use */ | |
2568 | ||
2569 | if (sdkp->lbpu && sdkp->max_unmap_blocks) | |
2570 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
2571 | else if (sdkp->lbpws) | |
2572 | sd_config_discard(sdkp, SD_LBP_WS16); | |
2573 | else if (sdkp->lbpws10) | |
2574 | sd_config_discard(sdkp, SD_LBP_WS10); | |
2575 | else | |
2576 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
2577 | } | |
e339c1a7 MP |
2578 | } |
2579 | ||
e3deec09 | 2580 | out: |
d11b6916 MP |
2581 | kfree(buffer); |
2582 | } | |
2583 | ||
3821d768 MP |
2584 | /** |
2585 | * sd_read_block_characteristics - Query block dev. characteristics | |
2586 | * @disk: disk to query | |
2587 | */ | |
2588 | static void sd_read_block_characteristics(struct scsi_disk *sdkp) | |
2589 | { | |
e3deec09 | 2590 | unsigned char *buffer; |
3821d768 | 2591 | u16 rot; |
bb2d3de1 | 2592 | const int vpd_len = 64; |
3821d768 | 2593 | |
e3deec09 | 2594 | buffer = kmalloc(vpd_len, GFP_KERNEL); |
3821d768 | 2595 | |
e3deec09 JB |
2596 | if (!buffer || |
2597 | /* Block Device Characteristics VPD */ | |
2598 | scsi_get_vpd_page(sdkp->device, 0xb1, buffer, vpd_len)) | |
2599 | goto out; | |
3821d768 MP |
2600 | |
2601 | rot = get_unaligned_be16(&buffer[4]); | |
2602 | ||
2603 | if (rot == 1) | |
2604 | queue_flag_set_unlocked(QUEUE_FLAG_NONROT, sdkp->disk->queue); | |
2605 | ||
e3deec09 | 2606 | out: |
3821d768 MP |
2607 | kfree(buffer); |
2608 | } | |
2609 | ||
045d3fe7 | 2610 | /** |
c98a0eb0 | 2611 | * sd_read_block_provisioning - Query provisioning VPD page |
045d3fe7 MP |
2612 | * @disk: disk to query |
2613 | */ | |
c98a0eb0 | 2614 | static void sd_read_block_provisioning(struct scsi_disk *sdkp) |
045d3fe7 MP |
2615 | { |
2616 | unsigned char *buffer; | |
2617 | const int vpd_len = 8; | |
2618 | ||
c98a0eb0 | 2619 | if (sdkp->lbpme == 0) |
045d3fe7 MP |
2620 | return; |
2621 | ||
2622 | buffer = kmalloc(vpd_len, GFP_KERNEL); | |
2623 | ||
2624 | if (!buffer || scsi_get_vpd_page(sdkp->device, 0xb2, buffer, vpd_len)) | |
2625 | goto out; | |
2626 | ||
c98a0eb0 MP |
2627 | sdkp->lbpvpd = 1; |
2628 | sdkp->lbpu = (buffer[5] >> 7) & 1; /* UNMAP */ | |
2629 | sdkp->lbpws = (buffer[5] >> 6) & 1; /* WRITE SAME(16) with UNMAP */ | |
2630 | sdkp->lbpws10 = (buffer[5] >> 5) & 1; /* WRITE SAME(10) with UNMAP */ | |
045d3fe7 MP |
2631 | |
2632 | out: | |
2633 | kfree(buffer); | |
2634 | } | |
2635 | ||
5db44863 MP |
2636 | static void sd_read_write_same(struct scsi_disk *sdkp, unsigned char *buffer) |
2637 | { | |
2638 | if (scsi_report_opcode(sdkp->device, buffer, SD_BUF_SIZE, | |
2639 | WRITE_SAME_16)) | |
2640 | sdkp->ws16 = 1; | |
2641 | } | |
2642 | ||
ffd4bc2a MP |
2643 | static int sd_try_extended_inquiry(struct scsi_device *sdp) |
2644 | { | |
2645 | /* | |
2646 | * Although VPD inquiries can go to SCSI-2 type devices, | |
2647 | * some USB ones crash on receiving them, and the pages | |
2648 | * we currently ask for are for SPC-3 and beyond | |
2649 | */ | |
09b6b51b | 2650 | if (sdp->scsi_level > SCSI_SPC_2 && !sdp->skip_vpd_pages) |
ffd4bc2a MP |
2651 | return 1; |
2652 | return 0; | |
2653 | } | |
2654 | ||
1da177e4 LT |
2655 | /** |
2656 | * sd_revalidate_disk - called the first time a new disk is seen, | |
2657 | * performs disk spin up, read_capacity, etc. | |
2658 | * @disk: struct gendisk we care about | |
2659 | **/ | |
2660 | static int sd_revalidate_disk(struct gendisk *disk) | |
2661 | { | |
2662 | struct scsi_disk *sdkp = scsi_disk(disk); | |
2663 | struct scsi_device *sdp = sdkp->device; | |
1da177e4 | 2664 | unsigned char *buffer; |
4913efe4 | 2665 | unsigned flush = 0; |
1da177e4 | 2666 | |
fa0d34be MP |
2667 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, |
2668 | "sd_revalidate_disk\n")); | |
1da177e4 LT |
2669 | |
2670 | /* | |
2671 | * If the device is offline, don't try and read capacity or any | |
2672 | * of the other niceties. | |
2673 | */ | |
2674 | if (!scsi_device_online(sdp)) | |
2675 | goto out; | |
2676 | ||
a6123f14 | 2677 | buffer = kmalloc(SD_BUF_SIZE, GFP_KERNEL); |
1da177e4 | 2678 | if (!buffer) { |
e73aec82 MP |
2679 | sd_printk(KERN_WARNING, sdkp, "sd_revalidate_disk: Memory " |
2680 | "allocation failure.\n"); | |
ea73a9f2 | 2681 | goto out; |
1da177e4 LT |
2682 | } |
2683 | ||
e73aec82 | 2684 | sd_spinup_disk(sdkp); |
1da177e4 LT |
2685 | |
2686 | /* | |
2687 | * Without media there is no reason to ask; moreover, some devices | |
2688 | * react badly if we do. | |
2689 | */ | |
2690 | if (sdkp->media_present) { | |
e73aec82 | 2691 | sd_read_capacity(sdkp, buffer); |
ffd4bc2a MP |
2692 | |
2693 | if (sd_try_extended_inquiry(sdp)) { | |
c98a0eb0 | 2694 | sd_read_block_provisioning(sdkp); |
ffd4bc2a MP |
2695 | sd_read_block_limits(sdkp); |
2696 | sd_read_block_characteristics(sdkp); | |
2697 | } | |
2698 | ||
e73aec82 MP |
2699 | sd_read_write_protect_flag(sdkp, buffer); |
2700 | sd_read_cache_type(sdkp, buffer); | |
e0597d70 | 2701 | sd_read_app_tag_own(sdkp, buffer); |
5db44863 | 2702 | sd_read_write_same(sdkp, buffer); |
1da177e4 | 2703 | } |
461d4e90 | 2704 | |
70a9b873 MP |
2705 | sdkp->first_scan = 0; |
2706 | ||
461d4e90 TH |
2707 | /* |
2708 | * We now have all cache related info, determine how we deal | |
4913efe4 | 2709 | * with flush requests. |
461d4e90 | 2710 | */ |
4913efe4 TH |
2711 | if (sdkp->WCE) { |
2712 | flush |= REQ_FLUSH; | |
2713 | if (sdkp->DPOFUA) | |
2714 | flush |= REQ_FUA; | |
2715 | } | |
461d4e90 | 2716 | |
4913efe4 | 2717 | blk_queue_flush(sdkp->disk->queue, flush); |
461d4e90 | 2718 | |
1da177e4 | 2719 | set_capacity(disk, sdkp->capacity); |
5db44863 | 2720 | sd_config_write_same(sdkp); |
1da177e4 LT |
2721 | kfree(buffer); |
2722 | ||
1da177e4 LT |
2723 | out: |
2724 | return 0; | |
2725 | } | |
2726 | ||
72ec24bd TH |
2727 | /** |
2728 | * sd_unlock_native_capacity - unlock native capacity | |
2729 | * @disk: struct gendisk to set capacity for | |
2730 | * | |
2731 | * Block layer calls this function if it detects that partitions | |
2732 | * on @disk reach beyond the end of the device. If the SCSI host | |
2733 | * implements ->unlock_native_capacity() method, it's invoked to | |
2734 | * give it a chance to adjust the device capacity. | |
2735 | * | |
2736 | * CONTEXT: | |
2737 | * Defined by block layer. Might sleep. | |
2738 | */ | |
2739 | static void sd_unlock_native_capacity(struct gendisk *disk) | |
2740 | { | |
2741 | struct scsi_device *sdev = scsi_disk(disk)->device; | |
2742 | ||
2743 | if (sdev->host->hostt->unlock_native_capacity) | |
2744 | sdev->host->hostt->unlock_native_capacity(sdev); | |
2745 | } | |
2746 | ||
3e1a7ff8 TH |
2747 | /** |
2748 | * sd_format_disk_name - format disk name | |
2749 | * @prefix: name prefix - ie. "sd" for SCSI disks | |
2750 | * @index: index of the disk to format name for | |
2751 | * @buf: output buffer | |
2752 | * @buflen: length of the output buffer | |
2753 | * | |
2754 | * SCSI disk names starts at sda. The 26th device is sdz and the | |
2755 | * 27th is sdaa. The last one for two lettered suffix is sdzz | |
2756 | * which is followed by sdaaa. | |
2757 | * | |
2758 | * This is basically 26 base counting with one extra 'nil' entry | |
3ad2f3fb | 2759 | * at the beginning from the second digit on and can be |
3e1a7ff8 TH |
2760 | * determined using similar method as 26 base conversion with the |
2761 | * index shifted -1 after each digit is computed. | |
2762 | * | |
2763 | * CONTEXT: | |
2764 | * Don't care. | |
2765 | * | |
2766 | * RETURNS: | |
2767 | * 0 on success, -errno on failure. | |
2768 | */ | |
2769 | static int sd_format_disk_name(char *prefix, int index, char *buf, int buflen) | |
2770 | { | |
2771 | const int base = 'z' - 'a' + 1; | |
2772 | char *begin = buf + strlen(prefix); | |
2773 | char *end = buf + buflen; | |
2774 | char *p; | |
2775 | int unit; | |
2776 | ||
2777 | p = end - 1; | |
2778 | *p = '\0'; | |
2779 | unit = base; | |
2780 | do { | |
2781 | if (p == begin) | |
2782 | return -EINVAL; | |
2783 | *--p = 'a' + (index % unit); | |
2784 | index = (index / unit) - 1; | |
2785 | } while (index >= 0); | |
2786 | ||
2787 | memmove(begin, p, end - p); | |
2788 | memcpy(buf, prefix, strlen(prefix)); | |
2789 | ||
2790 | return 0; | |
2791 | } | |
2792 | ||
4ace92fc AV |
2793 | /* |
2794 | * The asynchronous part of sd_probe | |
2795 | */ | |
2796 | static void sd_probe_async(void *data, async_cookie_t cookie) | |
2797 | { | |
2798 | struct scsi_disk *sdkp = data; | |
2799 | struct scsi_device *sdp; | |
2800 | struct gendisk *gd; | |
2801 | u32 index; | |
2802 | struct device *dev; | |
2803 | ||
2804 | sdp = sdkp->device; | |
2805 | gd = sdkp->disk; | |
2806 | index = sdkp->index; | |
2807 | dev = &sdp->sdev_gendev; | |
2808 | ||
1a03ae0f MR |
2809 | gd->major = sd_major((index & 0xf0) >> 4); |
2810 | gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00); | |
2811 | gd->minors = SD_MINORS; | |
2812 | ||
4ace92fc AV |
2813 | gd->fops = &sd_fops; |
2814 | gd->private_data = &sdkp->driver; | |
2815 | gd->queue = sdkp->device->request_queue; | |
2816 | ||
70a9b873 MP |
2817 | /* defaults, until the device tells us otherwise */ |
2818 | sdp->sector_size = 512; | |
2819 | sdkp->capacity = 0; | |
2820 | sdkp->media_present = 1; | |
2821 | sdkp->write_prot = 0; | |
39c60a09 | 2822 | sdkp->cache_override = 0; |
70a9b873 MP |
2823 | sdkp->WCE = 0; |
2824 | sdkp->RCD = 0; | |
2825 | sdkp->ATO = 0; | |
2826 | sdkp->first_scan = 1; | |
18a4d0a2 | 2827 | sdkp->max_medium_access_timeouts = SD_MAX_MEDIUM_TIMEOUTS; |
70a9b873 | 2828 | |
4ace92fc AV |
2829 | sd_revalidate_disk(gd); |
2830 | ||
2831 | blk_queue_prep_rq(sdp->request_queue, sd_prep_fn); | |
f1126e95 | 2832 | blk_queue_unprep_rq(sdp->request_queue, sd_unprep_fn); |
4ace92fc AV |
2833 | |
2834 | gd->driverfs_dev = &sdp->sdev_gendev; | |
97fedbbe | 2835 | gd->flags = GENHD_FL_EXT_DEVT; |
2bae0093 | 2836 | if (sdp->removable) { |
4ace92fc | 2837 | gd->flags |= GENHD_FL_REMOVABLE; |
2bae0093 TH |
2838 | gd->events |= DISK_EVENT_MEDIA_CHANGE; |
2839 | } | |
4ace92fc | 2840 | |
4ace92fc | 2841 | add_disk(gd); |
fe542396 MP |
2842 | if (sdkp->capacity) |
2843 | sd_dif_config_host(sdkp); | |
4ace92fc | 2844 | |
3821d768 MP |
2845 | sd_revalidate_disk(gd); |
2846 | ||
4ace92fc AV |
2847 | sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n", |
2848 | sdp->removable ? "removable " : ""); | |
6df339a5 | 2849 | blk_pm_runtime_init(sdp->request_queue, dev); |
478a8a05 | 2850 | scsi_autopm_put_device(sdp); |
ea038f63 | 2851 | put_device(&sdkp->dev); |
4ace92fc AV |
2852 | } |
2853 | ||
1da177e4 LT |
2854 | /** |
2855 | * sd_probe - called during driver initialization and whenever a | |
2856 | * new scsi device is attached to the system. It is called once | |
2857 | * for each scsi device (not just disks) present. | |
2858 | * @dev: pointer to device object | |
2859 | * | |
2860 | * Returns 0 if successful (or not interested in this scsi device | |
2861 | * (e.g. scanner)); 1 when there is an error. | |
2862 | * | |
2863 | * Note: this function is invoked from the scsi mid-level. | |
2864 | * This function sets up the mapping between a given | |
2865 | * <host,channel,id,lun> (found in sdp) and new device name | |
2866 | * (e.g. /dev/sda). More precisely it is the block device major | |
2867 | * and minor number that is chosen here. | |
2868 | * | |
2db93ce8 PU |
2869 | * Assume sd_probe is not re-entrant (for time being) |
2870 | * Also think about sd_probe() and sd_remove() running coincidentally. | |
1da177e4 LT |
2871 | **/ |
2872 | static int sd_probe(struct device *dev) | |
2873 | { | |
2874 | struct scsi_device *sdp = to_scsi_device(dev); | |
2875 | struct scsi_disk *sdkp; | |
2876 | struct gendisk *gd; | |
439d77f7 | 2877 | int index; |
1da177e4 LT |
2878 | int error; |
2879 | ||
2880 | error = -ENODEV; | |
631e8a13 | 2881 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_MOD && sdp->type != TYPE_RBC) |
1da177e4 LT |
2882 | goto out; |
2883 | ||
9ccfc756 | 2884 | SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO, sdp, |
2db93ce8 | 2885 | "sd_probe\n")); |
1da177e4 LT |
2886 | |
2887 | error = -ENOMEM; | |
24669f75 | 2888 | sdkp = kzalloc(sizeof(*sdkp), GFP_KERNEL); |
1da177e4 LT |
2889 | if (!sdkp) |
2890 | goto out; | |
2891 | ||
689d6fac | 2892 | gd = alloc_disk(SD_MINORS); |
1da177e4 LT |
2893 | if (!gd) |
2894 | goto out_free; | |
2895 | ||
f27bac27 TH |
2896 | do { |
2897 | if (!ida_pre_get(&sd_index_ida, GFP_KERNEL)) | |
2898 | goto out_put; | |
1da177e4 | 2899 | |
4034cc68 | 2900 | spin_lock(&sd_index_lock); |
f27bac27 | 2901 | error = ida_get_new(&sd_index_ida, &index); |
4034cc68 | 2902 | spin_unlock(&sd_index_lock); |
f27bac27 | 2903 | } while (error == -EAGAIN); |
1da177e4 | 2904 | |
21208ae5 DK |
2905 | if (error) { |
2906 | sdev_printk(KERN_WARNING, sdp, "sd_probe: memory exhausted.\n"); | |
1da177e4 | 2907 | goto out_put; |
1a03ae0f MR |
2908 | } |
2909 | ||
3e1a7ff8 | 2910 | error = sd_format_disk_name("sd", index, gd->disk_name, DISK_NAME_LEN); |
21208ae5 DK |
2911 | if (error) { |
2912 | sdev_printk(KERN_WARNING, sdp, "SCSI disk (sd) name length exceeded.\n"); | |
f27bac27 | 2913 | goto out_free_index; |
21208ae5 | 2914 | } |
f27bac27 | 2915 | |
1da177e4 LT |
2916 | sdkp->device = sdp; |
2917 | sdkp->driver = &sd_template; | |
2918 | sdkp->disk = gd; | |
2919 | sdkp->index = index; | |
409f3499 | 2920 | atomic_set(&sdkp->openers, 0); |
9e1a1537 | 2921 | atomic_set(&sdkp->device->ioerr_cnt, 0); |
1da177e4 | 2922 | |
601e7638 JB |
2923 | if (!sdp->request_queue->rq_timeout) { |
2924 | if (sdp->type != TYPE_MOD) | |
2925 | blk_queue_rq_timeout(sdp->request_queue, SD_TIMEOUT); | |
2926 | else | |
2927 | blk_queue_rq_timeout(sdp->request_queue, | |
2928 | SD_MOD_TIMEOUT); | |
2929 | } | |
2930 | ||
2931 | device_initialize(&sdkp->dev); | |
478a8a05 | 2932 | sdkp->dev.parent = dev; |
601e7638 | 2933 | sdkp->dev.class = &sd_disk_class; |
478a8a05 | 2934 | dev_set_name(&sdkp->dev, dev_name(dev)); |
601e7638 JB |
2935 | |
2936 | if (device_add(&sdkp->dev)) | |
2937 | goto out_free_index; | |
2938 | ||
478a8a05 AS |
2939 | get_device(dev); |
2940 | dev_set_drvdata(dev, sdkp); | |
601e7638 | 2941 | |
ea038f63 | 2942 | get_device(&sdkp->dev); /* prevent release before async_schedule */ |
a7a20d10 | 2943 | async_schedule_domain(sd_probe_async, sdkp, &scsi_sd_probe_domain); |
1da177e4 LT |
2944 | |
2945 | return 0; | |
2946 | ||
f27bac27 | 2947 | out_free_index: |
4034cc68 | 2948 | spin_lock(&sd_index_lock); |
f27bac27 | 2949 | ida_remove(&sd_index_ida, index); |
4034cc68 | 2950 | spin_unlock(&sd_index_lock); |
6bdaa1f1 | 2951 | out_put: |
1da177e4 | 2952 | put_disk(gd); |
6bdaa1f1 | 2953 | out_free: |
1da177e4 | 2954 | kfree(sdkp); |
6bdaa1f1 | 2955 | out: |
1da177e4 LT |
2956 | return error; |
2957 | } | |
2958 | ||
2959 | /** | |
2960 | * sd_remove - called whenever a scsi disk (previously recognized by | |
2961 | * sd_probe) is detached from the system. It is called (potentially | |
2962 | * multiple times) during sd module unload. | |
2963 | * @sdp: pointer to mid level scsi device object | |
2964 | * | |
2965 | * Note: this function is invoked from the scsi mid-level. | |
2966 | * This function potentially frees up a device name (e.g. /dev/sdc) | |
2967 | * that could be re-used by a subsequent sd_probe(). | |
2968 | * This function is not called when the built-in sd driver is "exit-ed". | |
2969 | **/ | |
2970 | static int sd_remove(struct device *dev) | |
2971 | { | |
601e7638 | 2972 | struct scsi_disk *sdkp; |
1da177e4 | 2973 | |
601e7638 | 2974 | sdkp = dev_get_drvdata(dev); |
478a8a05 AS |
2975 | scsi_autopm_get_device(sdkp->device); |
2976 | ||
a7a20d10 | 2977 | async_synchronize_full_domain(&scsi_sd_probe_domain); |
b391277a | 2978 | blk_queue_prep_rq(sdkp->device->request_queue, scsi_prep_fn); |
82b6d57f | 2979 | blk_queue_unprep_rq(sdkp->device->request_queue, NULL); |
ee959b00 | 2980 | device_del(&sdkp->dev); |
1da177e4 LT |
2981 | del_gendisk(sdkp->disk); |
2982 | sd_shutdown(dev); | |
39b7f1e2 | 2983 | |
0b950672 | 2984 | mutex_lock(&sd_ref_mutex); |
39b7f1e2 | 2985 | dev_set_drvdata(dev, NULL); |
ee959b00 | 2986 | put_device(&sdkp->dev); |
0b950672 | 2987 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
2988 | |
2989 | return 0; | |
2990 | } | |
2991 | ||
2992 | /** | |
2993 | * scsi_disk_release - Called to free the scsi_disk structure | |
ee959b00 | 2994 | * @dev: pointer to embedded class device |
1da177e4 | 2995 | * |
0b950672 | 2996 | * sd_ref_mutex must be held entering this routine. Because it is |
1da177e4 LT |
2997 | * called on last put, you should always use the scsi_disk_get() |
2998 | * scsi_disk_put() helpers which manipulate the semaphore directly | |
ee959b00 | 2999 | * and never do a direct put_device. |
1da177e4 | 3000 | **/ |
ee959b00 | 3001 | static void scsi_disk_release(struct device *dev) |
1da177e4 | 3002 | { |
ee959b00 | 3003 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
1da177e4 LT |
3004 | struct gendisk *disk = sdkp->disk; |
3005 | ||
4034cc68 | 3006 | spin_lock(&sd_index_lock); |
f27bac27 | 3007 | ida_remove(&sd_index_ida, sdkp->index); |
4034cc68 | 3008 | spin_unlock(&sd_index_lock); |
1da177e4 LT |
3009 | |
3010 | disk->private_data = NULL; | |
1da177e4 | 3011 | put_disk(disk); |
39b7f1e2 | 3012 | put_device(&sdkp->device->sdev_gendev); |
1da177e4 LT |
3013 | |
3014 | kfree(sdkp); | |
3015 | } | |
3016 | ||
cc5d2c8c | 3017 | static int sd_start_stop_device(struct scsi_disk *sdkp, int start) |
c3c94c5a TH |
3018 | { |
3019 | unsigned char cmd[6] = { START_STOP }; /* START_VALID */ | |
3020 | struct scsi_sense_hdr sshdr; | |
cc5d2c8c | 3021 | struct scsi_device *sdp = sdkp->device; |
c3c94c5a TH |
3022 | int res; |
3023 | ||
3024 | if (start) | |
3025 | cmd[4] |= 1; /* START */ | |
3026 | ||
d2886ea3 SR |
3027 | if (sdp->start_stop_pwr_cond) |
3028 | cmd[4] |= start ? 1 << 4 : 3 << 4; /* Active or Standby */ | |
3029 | ||
c3c94c5a TH |
3030 | if (!scsi_device_online(sdp)) |
3031 | return -ENODEV; | |
3032 | ||
9b21493c LM |
3033 | res = scsi_execute_req_flags(sdp, cmd, DMA_NONE, NULL, 0, &sshdr, |
3034 | SD_TIMEOUT, SD_MAX_RETRIES, NULL, REQ_PM); | |
c3c94c5a | 3035 | if (res) { |
cc5d2c8c JB |
3036 | sd_printk(KERN_WARNING, sdkp, "START_STOP FAILED\n"); |
3037 | sd_print_result(sdkp, res); | |
c3c94c5a | 3038 | if (driver_byte(res) & DRIVER_SENSE) |
cc5d2c8c | 3039 | sd_print_sense_hdr(sdkp, &sshdr); |
c3c94c5a TH |
3040 | } |
3041 | ||
3042 | return res; | |
3043 | } | |
3044 | ||
1da177e4 LT |
3045 | /* |
3046 | * Send a SYNCHRONIZE CACHE instruction down to the device through | |
3047 | * the normal SCSI command structure. Wait for the command to | |
3048 | * complete. | |
3049 | */ | |
3050 | static void sd_shutdown(struct device *dev) | |
3051 | { | |
39b7f1e2 | 3052 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
1da177e4 LT |
3053 | |
3054 | if (!sdkp) | |
3055 | return; /* this can happen */ | |
3056 | ||
54f57588 LM |
3057 | if (pm_runtime_suspended(dev)) |
3058 | goto exit; | |
3059 | ||
39b7f1e2 | 3060 | if (sdkp->WCE) { |
e73aec82 MP |
3061 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
3062 | sd_sync_cache(sdkp); | |
39b7f1e2 | 3063 | } |
c3c94c5a | 3064 | |
cc5d2c8c JB |
3065 | if (system_state != SYSTEM_RESTART && sdkp->device->manage_start_stop) { |
3066 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); | |
3067 | sd_start_stop_device(sdkp, 0); | |
c3c94c5a TH |
3068 | } |
3069 | ||
54f57588 | 3070 | exit: |
39b7f1e2 AS |
3071 | scsi_disk_put(sdkp); |
3072 | } | |
1da177e4 | 3073 | |
691e3d31 | 3074 | static int sd_suspend(struct device *dev) |
c3c94c5a | 3075 | { |
c3c94c5a | 3076 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
09ff92fe | 3077 | int ret = 0; |
c3c94c5a TH |
3078 | |
3079 | if (!sdkp) | |
3080 | return 0; /* this can happen */ | |
3081 | ||
3082 | if (sdkp->WCE) { | |
cc5d2c8c | 3083 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
c3c94c5a TH |
3084 | ret = sd_sync_cache(sdkp); |
3085 | if (ret) | |
09ff92fe | 3086 | goto done; |
c3c94c5a TH |
3087 | } |
3088 | ||
691e3d31 | 3089 | if (sdkp->device->manage_start_stop) { |
cc5d2c8c JB |
3090 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); |
3091 | ret = sd_start_stop_device(sdkp, 0); | |
c3c94c5a TH |
3092 | } |
3093 | ||
09ff92fe AS |
3094 | done: |
3095 | scsi_disk_put(sdkp); | |
3096 | return ret; | |
c3c94c5a TH |
3097 | } |
3098 | ||
3099 | static int sd_resume(struct device *dev) | |
3100 | { | |
c3c94c5a | 3101 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
09ff92fe | 3102 | int ret = 0; |
c3c94c5a | 3103 | |
cc5d2c8c | 3104 | if (!sdkp->device->manage_start_stop) |
09ff92fe | 3105 | goto done; |
c3c94c5a | 3106 | |
cc5d2c8c | 3107 | sd_printk(KERN_NOTICE, sdkp, "Starting disk\n"); |
09ff92fe | 3108 | ret = sd_start_stop_device(sdkp, 1); |
c3c94c5a | 3109 | |
09ff92fe AS |
3110 | done: |
3111 | scsi_disk_put(sdkp); | |
3112 | return ret; | |
c3c94c5a TH |
3113 | } |
3114 | ||
1da177e4 LT |
3115 | /** |
3116 | * init_sd - entry point for this driver (both when built in or when | |
3117 | * a module). | |
3118 | * | |
3119 | * Note: this function registers this driver with the scsi mid-level. | |
3120 | **/ | |
3121 | static int __init init_sd(void) | |
3122 | { | |
5e4009ba | 3123 | int majors = 0, i, err; |
1da177e4 LT |
3124 | |
3125 | SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n")); | |
3126 | ||
3127 | for (i = 0; i < SD_MAJORS; i++) | |
3128 | if (register_blkdev(sd_major(i), "sd") == 0) | |
3129 | majors++; | |
3130 | ||
3131 | if (!majors) | |
3132 | return -ENODEV; | |
3133 | ||
5e4009ba JG |
3134 | err = class_register(&sd_disk_class); |
3135 | if (err) | |
3136 | goto err_out; | |
6bdaa1f1 | 3137 | |
4e7392ec MP |
3138 | sd_cdb_cache = kmem_cache_create("sd_ext_cdb", SD_EXT_CDB_SIZE, |
3139 | 0, 0, NULL); | |
3140 | if (!sd_cdb_cache) { | |
3141 | printk(KERN_ERR "sd: can't init extended cdb cache\n"); | |
3142 | goto err_out_class; | |
3143 | } | |
3144 | ||
3145 | sd_cdb_pool = mempool_create_slab_pool(SD_MEMPOOL_SIZE, sd_cdb_cache); | |
3146 | if (!sd_cdb_pool) { | |
3147 | printk(KERN_ERR "sd: can't init extended cdb pool\n"); | |
3148 | goto err_out_cache; | |
3149 | } | |
3150 | ||
afd5e34b JD |
3151 | err = scsi_register_driver(&sd_template.gendrv); |
3152 | if (err) | |
3153 | goto err_out_driver; | |
3154 | ||
5e4009ba JG |
3155 | return 0; |
3156 | ||
afd5e34b JD |
3157 | err_out_driver: |
3158 | mempool_destroy(sd_cdb_pool); | |
3159 | ||
4e7392ec MP |
3160 | err_out_cache: |
3161 | kmem_cache_destroy(sd_cdb_cache); | |
3162 | ||
5e4009ba JG |
3163 | err_out_class: |
3164 | class_unregister(&sd_disk_class); | |
3165 | err_out: | |
3166 | for (i = 0; i < SD_MAJORS; i++) | |
3167 | unregister_blkdev(sd_major(i), "sd"); | |
3168 | return err; | |
1da177e4 LT |
3169 | } |
3170 | ||
3171 | /** | |
3172 | * exit_sd - exit point for this driver (when it is a module). | |
3173 | * | |
3174 | * Note: this function unregisters this driver from the scsi mid-level. | |
3175 | **/ | |
3176 | static void __exit exit_sd(void) | |
3177 | { | |
3178 | int i; | |
3179 | ||
3180 | SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n")); | |
3181 | ||
afd5e34b | 3182 | scsi_unregister_driver(&sd_template.gendrv); |
4e7392ec MP |
3183 | mempool_destroy(sd_cdb_pool); |
3184 | kmem_cache_destroy(sd_cdb_cache); | |
3185 | ||
5e4009ba JG |
3186 | class_unregister(&sd_disk_class); |
3187 | ||
1da177e4 LT |
3188 | for (i = 0; i < SD_MAJORS; i++) |
3189 | unregister_blkdev(sd_major(i), "sd"); | |
3190 | } | |
3191 | ||
1da177e4 LT |
3192 | module_init(init_sd); |
3193 | module_exit(exit_sd); | |
e73aec82 MP |
3194 | |
3195 | static void sd_print_sense_hdr(struct scsi_disk *sdkp, | |
3196 | struct scsi_sense_hdr *sshdr) | |
3197 | { | |
2e4c3329 | 3198 | sd_printk(KERN_INFO, sdkp, " "); |
e73aec82 | 3199 | scsi_show_sense_hdr(sshdr); |
2e4c3329 | 3200 | sd_printk(KERN_INFO, sdkp, " "); |
e73aec82 MP |
3201 | scsi_show_extd_sense(sshdr->asc, sshdr->ascq); |
3202 | } | |
3203 | ||
3204 | static void sd_print_result(struct scsi_disk *sdkp, int result) | |
3205 | { | |
2e4c3329 | 3206 | sd_printk(KERN_INFO, sdkp, " "); |
e73aec82 MP |
3207 | scsi_show_result(result); |
3208 | } | |
3209 |