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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; | |
145 | int len; | |
146 | ||
147 | if (sdp->type != TYPE_DISK) | |
148 | /* no cache control on RBC devices; theoretically they | |
149 | * can do it, but there's probably so many exceptions | |
150 | * it's not worth the risk */ | |
151 | return -EINVAL; | |
152 | ||
6391a113 | 153 | for (i = 0; i < ARRAY_SIZE(sd_cache_types); i++) { |
439d77f7 | 154 | len = strlen(sd_cache_types[i]); |
6bdaa1f1 JB |
155 | if (strncmp(sd_cache_types[i], buf, len) == 0 && |
156 | buf[len] == '\n') { | |
157 | ct = i; | |
158 | break; | |
159 | } | |
160 | } | |
161 | if (ct < 0) | |
162 | return -EINVAL; | |
163 | rcd = ct & 0x01 ? 1 : 0; | |
164 | wce = ct & 0x02 ? 1 : 0; | |
165 | if (scsi_mode_sense(sdp, 0x08, 8, buffer, sizeof(buffer), SD_TIMEOUT, | |
166 | SD_MAX_RETRIES, &data, NULL)) | |
167 | return -EINVAL; | |
a9312fb8 | 168 | len = min_t(size_t, sizeof(buffer), data.length - data.header_length - |
6bdaa1f1 JB |
169 | data.block_descriptor_length); |
170 | buffer_data = buffer + data.header_length + | |
171 | data.block_descriptor_length; | |
172 | buffer_data[2] &= ~0x05; | |
173 | buffer_data[2] |= wce << 2 | rcd; | |
174 | sp = buffer_data[0] & 0x80 ? 1 : 0; | |
175 | ||
176 | if (scsi_mode_select(sdp, 1, sp, 8, buffer_data, len, SD_TIMEOUT, | |
177 | SD_MAX_RETRIES, &data, &sshdr)) { | |
178 | if (scsi_sense_valid(&sshdr)) | |
e73aec82 | 179 | sd_print_sense_hdr(sdkp, &sshdr); |
6bdaa1f1 JB |
180 | return -EINVAL; |
181 | } | |
f98a8cae | 182 | revalidate_disk(sdkp->disk); |
6bdaa1f1 JB |
183 | return count; |
184 | } | |
185 | ||
ee959b00 TJ |
186 | static ssize_t |
187 | sd_store_manage_start_stop(struct device *dev, struct device_attribute *attr, | |
188 | const char *buf, size_t count) | |
c3c94c5a | 189 | { |
ee959b00 | 190 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
c3c94c5a TH |
191 | struct scsi_device *sdp = sdkp->device; |
192 | ||
193 | if (!capable(CAP_SYS_ADMIN)) | |
194 | return -EACCES; | |
195 | ||
196 | sdp->manage_start_stop = simple_strtoul(buf, NULL, 10); | |
197 | ||
198 | return count; | |
199 | } | |
200 | ||
ee959b00 TJ |
201 | static ssize_t |
202 | sd_store_allow_restart(struct device *dev, struct device_attribute *attr, | |
203 | const char *buf, size_t count) | |
a144c5ae | 204 | { |
ee959b00 | 205 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
a144c5ae BK |
206 | struct scsi_device *sdp = sdkp->device; |
207 | ||
208 | if (!capable(CAP_SYS_ADMIN)) | |
209 | return -EACCES; | |
210 | ||
211 | if (sdp->type != TYPE_DISK) | |
212 | return -EINVAL; | |
213 | ||
214 | sdp->allow_restart = simple_strtoul(buf, NULL, 10); | |
215 | ||
216 | return count; | |
217 | } | |
218 | ||
ee959b00 TJ |
219 | static ssize_t |
220 | sd_show_cache_type(struct device *dev, struct device_attribute *attr, | |
221 | char *buf) | |
6bdaa1f1 | 222 | { |
ee959b00 | 223 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
224 | int ct = sdkp->RCD + 2*sdkp->WCE; |
225 | ||
226 | return snprintf(buf, 40, "%s\n", sd_cache_types[ct]); | |
227 | } | |
228 | ||
ee959b00 TJ |
229 | static ssize_t |
230 | sd_show_fua(struct device *dev, struct device_attribute *attr, char *buf) | |
6bdaa1f1 | 231 | { |
ee959b00 | 232 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
233 | |
234 | return snprintf(buf, 20, "%u\n", sdkp->DPOFUA); | |
235 | } | |
236 | ||
ee959b00 TJ |
237 | static ssize_t |
238 | sd_show_manage_start_stop(struct device *dev, struct device_attribute *attr, | |
239 | char *buf) | |
c3c94c5a | 240 | { |
ee959b00 | 241 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
c3c94c5a TH |
242 | struct scsi_device *sdp = sdkp->device; |
243 | ||
244 | return snprintf(buf, 20, "%u\n", sdp->manage_start_stop); | |
245 | } | |
246 | ||
ee959b00 TJ |
247 | static ssize_t |
248 | sd_show_allow_restart(struct device *dev, struct device_attribute *attr, | |
249 | char *buf) | |
a144c5ae | 250 | { |
ee959b00 | 251 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
a144c5ae BK |
252 | |
253 | return snprintf(buf, 40, "%d\n", sdkp->device->allow_restart); | |
254 | } | |
255 | ||
e0597d70 MP |
256 | static ssize_t |
257 | sd_show_protection_type(struct device *dev, struct device_attribute *attr, | |
258 | char *buf) | |
259 | { | |
260 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
261 | ||
262 | return snprintf(buf, 20, "%u\n", sdkp->protection_type); | |
263 | } | |
264 | ||
8172499a MP |
265 | static ssize_t |
266 | sd_store_protection_type(struct device *dev, struct device_attribute *attr, | |
267 | const char *buf, size_t count) | |
268 | { | |
269 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
270 | unsigned int val; | |
271 | int err; | |
272 | ||
273 | if (!capable(CAP_SYS_ADMIN)) | |
274 | return -EACCES; | |
275 | ||
276 | err = kstrtouint(buf, 10, &val); | |
277 | ||
278 | if (err) | |
279 | return err; | |
280 | ||
281 | if (val >= 0 && val <= SD_DIF_TYPE3_PROTECTION) | |
282 | sdkp->protection_type = val; | |
283 | ||
284 | return count; | |
285 | } | |
286 | ||
518fa8e3 MP |
287 | static ssize_t |
288 | sd_show_protection_mode(struct device *dev, struct device_attribute *attr, | |
289 | char *buf) | |
290 | { | |
291 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
292 | struct scsi_device *sdp = sdkp->device; | |
293 | unsigned int dif, dix; | |
294 | ||
295 | dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type); | |
296 | dix = scsi_host_dix_capable(sdp->host, sdkp->protection_type); | |
297 | ||
298 | if (!dix && scsi_host_dix_capable(sdp->host, SD_DIF_TYPE0_PROTECTION)) { | |
299 | dif = 0; | |
300 | dix = 1; | |
301 | } | |
302 | ||
303 | if (!dif && !dix) | |
304 | return snprintf(buf, 20, "none\n"); | |
305 | ||
306 | return snprintf(buf, 20, "%s%u\n", dix ? "dix" : "dif", dif); | |
307 | } | |
308 | ||
e0597d70 MP |
309 | static ssize_t |
310 | sd_show_app_tag_own(struct device *dev, struct device_attribute *attr, | |
311 | char *buf) | |
312 | { | |
313 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
314 | ||
315 | return snprintf(buf, 20, "%u\n", sdkp->ATO); | |
316 | } | |
317 | ||
e339c1a7 MP |
318 | static ssize_t |
319 | sd_show_thin_provisioning(struct device *dev, struct device_attribute *attr, | |
320 | char *buf) | |
321 | { | |
322 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
323 | ||
c98a0eb0 MP |
324 | return snprintf(buf, 20, "%u\n", sdkp->lbpme); |
325 | } | |
326 | ||
327 | static const char *lbp_mode[] = { | |
328 | [SD_LBP_FULL] = "full", | |
329 | [SD_LBP_UNMAP] = "unmap", | |
330 | [SD_LBP_WS16] = "writesame_16", | |
331 | [SD_LBP_WS10] = "writesame_10", | |
332 | [SD_LBP_ZERO] = "writesame_zero", | |
333 | [SD_LBP_DISABLE] = "disabled", | |
334 | }; | |
335 | ||
336 | static ssize_t | |
337 | sd_show_provisioning_mode(struct device *dev, struct device_attribute *attr, | |
338 | char *buf) | |
339 | { | |
340 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
341 | ||
342 | return snprintf(buf, 20, "%s\n", lbp_mode[sdkp->provisioning_mode]); | |
343 | } | |
344 | ||
345 | static ssize_t | |
346 | sd_store_provisioning_mode(struct device *dev, struct device_attribute *attr, | |
347 | const char *buf, size_t count) | |
348 | { | |
349 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
350 | struct scsi_device *sdp = sdkp->device; | |
351 | ||
352 | if (!capable(CAP_SYS_ADMIN)) | |
353 | return -EACCES; | |
354 | ||
355 | if (sdp->type != TYPE_DISK) | |
356 | return -EINVAL; | |
357 | ||
358 | if (!strncmp(buf, lbp_mode[SD_LBP_UNMAP], 20)) | |
359 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
360 | else if (!strncmp(buf, lbp_mode[SD_LBP_WS16], 20)) | |
361 | sd_config_discard(sdkp, SD_LBP_WS16); | |
362 | else if (!strncmp(buf, lbp_mode[SD_LBP_WS10], 20)) | |
363 | sd_config_discard(sdkp, SD_LBP_WS10); | |
364 | else if (!strncmp(buf, lbp_mode[SD_LBP_ZERO], 20)) | |
365 | sd_config_discard(sdkp, SD_LBP_ZERO); | |
366 | else if (!strncmp(buf, lbp_mode[SD_LBP_DISABLE], 20)) | |
367 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
368 | else | |
369 | return -EINVAL; | |
370 | ||
371 | return count; | |
e339c1a7 MP |
372 | } |
373 | ||
18a4d0a2 MP |
374 | static ssize_t |
375 | sd_show_max_medium_access_timeouts(struct device *dev, | |
376 | struct device_attribute *attr, char *buf) | |
377 | { | |
378 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
379 | ||
380 | return snprintf(buf, 20, "%u\n", sdkp->max_medium_access_timeouts); | |
381 | } | |
382 | ||
383 | static ssize_t | |
384 | sd_store_max_medium_access_timeouts(struct device *dev, | |
385 | struct device_attribute *attr, | |
386 | const char *buf, size_t count) | |
387 | { | |
388 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
389 | int err; | |
390 | ||
391 | if (!capable(CAP_SYS_ADMIN)) | |
392 | return -EACCES; | |
393 | ||
394 | err = kstrtouint(buf, 10, &sdkp->max_medium_access_timeouts); | |
395 | ||
396 | return err ? err : count; | |
397 | } | |
398 | ||
5db44863 MP |
399 | static ssize_t |
400 | sd_show_write_same_blocks(struct device *dev, struct device_attribute *attr, | |
401 | char *buf) | |
402 | { | |
403 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
404 | ||
405 | return snprintf(buf, 20, "%u\n", sdkp->max_ws_blocks); | |
406 | } | |
407 | ||
408 | static ssize_t | |
409 | sd_store_write_same_blocks(struct device *dev, struct device_attribute *attr, | |
410 | const char *buf, size_t count) | |
411 | { | |
412 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
413 | struct scsi_device *sdp = sdkp->device; | |
414 | unsigned long max; | |
415 | int err; | |
416 | ||
417 | if (!capable(CAP_SYS_ADMIN)) | |
418 | return -EACCES; | |
419 | ||
420 | if (sdp->type != TYPE_DISK) | |
421 | return -EINVAL; | |
422 | ||
423 | err = kstrtoul(buf, 10, &max); | |
424 | ||
425 | if (err) | |
426 | return err; | |
427 | ||
428 | if (max == 0) | |
429 | sdp->no_write_same = 1; | |
430 | else if (max <= SD_MAX_WS16_BLOCKS) | |
431 | sdkp->max_ws_blocks = max; | |
432 | ||
433 | sd_config_write_same(sdkp); | |
434 | ||
435 | return count; | |
436 | } | |
437 | ||
ee959b00 | 438 | static struct device_attribute sd_disk_attrs[] = { |
6bdaa1f1 JB |
439 | __ATTR(cache_type, S_IRUGO|S_IWUSR, sd_show_cache_type, |
440 | sd_store_cache_type), | |
441 | __ATTR(FUA, S_IRUGO, sd_show_fua, NULL), | |
a144c5ae BK |
442 | __ATTR(allow_restart, S_IRUGO|S_IWUSR, sd_show_allow_restart, |
443 | sd_store_allow_restart), | |
c3c94c5a TH |
444 | __ATTR(manage_start_stop, S_IRUGO|S_IWUSR, sd_show_manage_start_stop, |
445 | sd_store_manage_start_stop), | |
8172499a MP |
446 | __ATTR(protection_type, S_IRUGO|S_IWUSR, sd_show_protection_type, |
447 | sd_store_protection_type), | |
518fa8e3 | 448 | __ATTR(protection_mode, S_IRUGO, sd_show_protection_mode, NULL), |
e0597d70 | 449 | __ATTR(app_tag_own, S_IRUGO, sd_show_app_tag_own, NULL), |
e339c1a7 | 450 | __ATTR(thin_provisioning, S_IRUGO, sd_show_thin_provisioning, NULL), |
c98a0eb0 MP |
451 | __ATTR(provisioning_mode, S_IRUGO|S_IWUSR, sd_show_provisioning_mode, |
452 | sd_store_provisioning_mode), | |
5db44863 MP |
453 | __ATTR(max_write_same_blocks, S_IRUGO|S_IWUSR, |
454 | sd_show_write_same_blocks, sd_store_write_same_blocks), | |
18a4d0a2 MP |
455 | __ATTR(max_medium_access_timeouts, S_IRUGO|S_IWUSR, |
456 | sd_show_max_medium_access_timeouts, | |
457 | sd_store_max_medium_access_timeouts), | |
6bdaa1f1 JB |
458 | __ATTR_NULL, |
459 | }; | |
460 | ||
461 | static struct class sd_disk_class = { | |
462 | .name = "scsi_disk", | |
463 | .owner = THIS_MODULE, | |
ee959b00 TJ |
464 | .dev_release = scsi_disk_release, |
465 | .dev_attrs = sd_disk_attrs, | |
6bdaa1f1 | 466 | }; |
1da177e4 | 467 | |
691e3d31 AL |
468 | static const struct dev_pm_ops sd_pm_ops = { |
469 | .suspend = sd_suspend, | |
470 | .resume = sd_resume, | |
471 | .poweroff = sd_suspend, | |
472 | .restore = sd_resume, | |
473 | .runtime_suspend = sd_suspend, | |
474 | .runtime_resume = sd_resume, | |
475 | }; | |
476 | ||
1da177e4 LT |
477 | static struct scsi_driver sd_template = { |
478 | .owner = THIS_MODULE, | |
479 | .gendrv = { | |
480 | .name = "sd", | |
481 | .probe = sd_probe, | |
482 | .remove = sd_remove, | |
483 | .shutdown = sd_shutdown, | |
691e3d31 | 484 | .pm = &sd_pm_ops, |
1da177e4 LT |
485 | }, |
486 | .rescan = sd_rescan, | |
7b3d9545 | 487 | .done = sd_done, |
18a4d0a2 | 488 | .eh_action = sd_eh_action, |
1da177e4 LT |
489 | }; |
490 | ||
491 | /* | |
492 | * Device no to disk mapping: | |
493 | * | |
494 | * major disc2 disc p1 | |
495 | * |............|.............|....|....| <- dev_t | |
496 | * 31 20 19 8 7 4 3 0 | |
497 | * | |
498 | * Inside a major, we have 16k disks, however mapped non- | |
499 | * contiguously. The first 16 disks are for major0, the next | |
500 | * ones with major1, ... Disk 256 is for major0 again, disk 272 | |
501 | * for major1, ... | |
502 | * As we stay compatible with our numbering scheme, we can reuse | |
503 | * the well-know SCSI majors 8, 65--71, 136--143. | |
504 | */ | |
505 | static int sd_major(int major_idx) | |
506 | { | |
507 | switch (major_idx) { | |
508 | case 0: | |
509 | return SCSI_DISK0_MAJOR; | |
510 | case 1 ... 7: | |
511 | return SCSI_DISK1_MAJOR + major_idx - 1; | |
512 | case 8 ... 15: | |
513 | return SCSI_DISK8_MAJOR + major_idx - 8; | |
514 | default: | |
515 | BUG(); | |
516 | return 0; /* shut up gcc */ | |
517 | } | |
518 | } | |
519 | ||
39b7f1e2 | 520 | static struct scsi_disk *__scsi_disk_get(struct gendisk *disk) |
1da177e4 LT |
521 | { |
522 | struct scsi_disk *sdkp = NULL; | |
523 | ||
39b7f1e2 AS |
524 | if (disk->private_data) { |
525 | sdkp = scsi_disk(disk); | |
526 | if (scsi_device_get(sdkp->device) == 0) | |
ee959b00 | 527 | get_device(&sdkp->dev); |
39b7f1e2 AS |
528 | else |
529 | sdkp = NULL; | |
530 | } | |
531 | return sdkp; | |
532 | } | |
533 | ||
534 | static struct scsi_disk *scsi_disk_get(struct gendisk *disk) | |
535 | { | |
536 | struct scsi_disk *sdkp; | |
537 | ||
0b950672 | 538 | mutex_lock(&sd_ref_mutex); |
39b7f1e2 | 539 | sdkp = __scsi_disk_get(disk); |
0b950672 | 540 | mutex_unlock(&sd_ref_mutex); |
1da177e4 | 541 | return sdkp; |
39b7f1e2 | 542 | } |
1da177e4 | 543 | |
39b7f1e2 AS |
544 | static struct scsi_disk *scsi_disk_get_from_dev(struct device *dev) |
545 | { | |
546 | struct scsi_disk *sdkp; | |
547 | ||
0b950672 | 548 | mutex_lock(&sd_ref_mutex); |
39b7f1e2 AS |
549 | sdkp = dev_get_drvdata(dev); |
550 | if (sdkp) | |
551 | sdkp = __scsi_disk_get(sdkp->disk); | |
0b950672 | 552 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
553 | return sdkp; |
554 | } | |
555 | ||
556 | static void scsi_disk_put(struct scsi_disk *sdkp) | |
557 | { | |
558 | struct scsi_device *sdev = sdkp->device; | |
559 | ||
0b950672 | 560 | mutex_lock(&sd_ref_mutex); |
ee959b00 | 561 | put_device(&sdkp->dev); |
1da177e4 | 562 | scsi_device_put(sdev); |
0b950672 | 563 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
564 | } |
565 | ||
35e1a5d9 MP |
566 | static void sd_prot_op(struct scsi_cmnd *scmd, unsigned int dif) |
567 | { | |
568 | unsigned int prot_op = SCSI_PROT_NORMAL; | |
569 | unsigned int dix = scsi_prot_sg_count(scmd); | |
570 | ||
571 | if (scmd->sc_data_direction == DMA_FROM_DEVICE) { | |
572 | if (dif && dix) | |
573 | prot_op = SCSI_PROT_READ_PASS; | |
574 | else if (dif && !dix) | |
575 | prot_op = SCSI_PROT_READ_STRIP; | |
576 | else if (!dif && dix) | |
577 | prot_op = SCSI_PROT_READ_INSERT; | |
578 | } else { | |
579 | if (dif && dix) | |
580 | prot_op = SCSI_PROT_WRITE_PASS; | |
581 | else if (dif && !dix) | |
582 | prot_op = SCSI_PROT_WRITE_INSERT; | |
583 | else if (!dif && dix) | |
584 | prot_op = SCSI_PROT_WRITE_STRIP; | |
585 | } | |
586 | ||
587 | scsi_set_prot_op(scmd, prot_op); | |
588 | scsi_set_prot_type(scmd, dif); | |
589 | } | |
590 | ||
c98a0eb0 MP |
591 | static void sd_config_discard(struct scsi_disk *sdkp, unsigned int mode) |
592 | { | |
593 | struct request_queue *q = sdkp->disk->queue; | |
594 | unsigned int logical_block_size = sdkp->device->sector_size; | |
595 | unsigned int max_blocks = 0; | |
596 | ||
597 | q->limits.discard_zeroes_data = sdkp->lbprz; | |
2a8cfad0 MP |
598 | q->limits.discard_alignment = sdkp->unmap_alignment * |
599 | logical_block_size; | |
c98a0eb0 MP |
600 | q->limits.discard_granularity = |
601 | max(sdkp->physical_block_size, | |
602 | sdkp->unmap_granularity * logical_block_size); | |
603 | ||
89730393 MP |
604 | sdkp->provisioning_mode = mode; |
605 | ||
c98a0eb0 MP |
606 | switch (mode) { |
607 | ||
608 | case SD_LBP_DISABLE: | |
609 | q->limits.max_discard_sectors = 0; | |
610 | queue_flag_clear_unlocked(QUEUE_FLAG_DISCARD, q); | |
611 | return; | |
612 | ||
613 | case SD_LBP_UNMAP: | |
5db44863 MP |
614 | max_blocks = min_not_zero(sdkp->max_unmap_blocks, |
615 | (u32)SD_MAX_WS16_BLOCKS); | |
c98a0eb0 MP |
616 | break; |
617 | ||
618 | case SD_LBP_WS16: | |
5db44863 MP |
619 | max_blocks = min_not_zero(sdkp->max_ws_blocks, |
620 | (u32)SD_MAX_WS16_BLOCKS); | |
c98a0eb0 MP |
621 | break; |
622 | ||
623 | case SD_LBP_WS10: | |
5db44863 MP |
624 | max_blocks = min_not_zero(sdkp->max_ws_blocks, |
625 | (u32)SD_MAX_WS10_BLOCKS); | |
c98a0eb0 MP |
626 | break; |
627 | ||
628 | case SD_LBP_ZERO: | |
5db44863 MP |
629 | max_blocks = min_not_zero(sdkp->max_ws_blocks, |
630 | (u32)SD_MAX_WS10_BLOCKS); | |
c98a0eb0 MP |
631 | q->limits.discard_zeroes_data = 1; |
632 | break; | |
633 | } | |
634 | ||
635 | q->limits.max_discard_sectors = max_blocks * (logical_block_size >> 9); | |
636 | queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, q); | |
c98a0eb0 MP |
637 | } |
638 | ||
e339c1a7 | 639 | /** |
26e85fcd | 640 | * sd_setup_discard_cmnd - unmap blocks on thinly provisioned device |
66ac0280 | 641 | * @sdp: scsi device to operate one |
e339c1a7 MP |
642 | * @rq: Request to prepare |
643 | * | |
644 | * Will issue either UNMAP or WRITE SAME(16) depending on preference | |
645 | * indicated by target device. | |
646 | **/ | |
26e85fcd | 647 | static int sd_setup_discard_cmnd(struct scsi_device *sdp, struct request *rq) |
e339c1a7 MP |
648 | { |
649 | struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); | |
26e85fcd MP |
650 | sector_t sector = blk_rq_pos(rq); |
651 | unsigned int nr_sectors = blk_rq_sectors(rq); | |
652 | unsigned int nr_bytes = blk_rq_bytes(rq); | |
66ac0280 | 653 | unsigned int len; |
f1126e95 | 654 | int ret; |
c98a0eb0 | 655 | char *buf; |
66ac0280 | 656 | struct page *page; |
e339c1a7 | 657 | |
26e85fcd MP |
658 | sector >>= ilog2(sdp->sector_size) - 9; |
659 | nr_sectors >>= ilog2(sdp->sector_size) - 9; | |
e339c1a7 MP |
660 | rq->timeout = SD_TIMEOUT; |
661 | ||
662 | memset(rq->cmd, 0, rq->cmd_len); | |
663 | ||
66ac0280 CH |
664 | page = alloc_page(GFP_ATOMIC | __GFP_ZERO); |
665 | if (!page) | |
666 | return BLKPREP_DEFER; | |
667 | ||
c98a0eb0 MP |
668 | switch (sdkp->provisioning_mode) { |
669 | case SD_LBP_UNMAP: | |
670 | buf = page_address(page); | |
e339c1a7 | 671 | |
66ac0280 | 672 | rq->cmd_len = 10; |
e339c1a7 MP |
673 | rq->cmd[0] = UNMAP; |
674 | rq->cmd[8] = 24; | |
e339c1a7 MP |
675 | |
676 | put_unaligned_be16(6 + 16, &buf[0]); | |
677 | put_unaligned_be16(16, &buf[2]); | |
678 | put_unaligned_be64(sector, &buf[8]); | |
66ac0280 | 679 | put_unaligned_be32(nr_sectors, &buf[16]); |
e339c1a7 | 680 | |
66ac0280 | 681 | len = 24; |
c98a0eb0 MP |
682 | break; |
683 | ||
684 | case SD_LBP_WS16: | |
66ac0280 | 685 | rq->cmd_len = 16; |
e339c1a7 MP |
686 | rq->cmd[0] = WRITE_SAME_16; |
687 | rq->cmd[1] = 0x8; /* UNMAP */ | |
688 | put_unaligned_be64(sector, &rq->cmd[2]); | |
66ac0280 CH |
689 | put_unaligned_be32(nr_sectors, &rq->cmd[10]); |
690 | ||
691 | len = sdkp->device->sector_size; | |
c98a0eb0 MP |
692 | break; |
693 | ||
694 | case SD_LBP_WS10: | |
695 | case SD_LBP_ZERO: | |
696 | rq->cmd_len = 10; | |
697 | rq->cmd[0] = WRITE_SAME; | |
698 | if (sdkp->provisioning_mode == SD_LBP_WS10) | |
699 | rq->cmd[1] = 0x8; /* UNMAP */ | |
700 | put_unaligned_be32(sector, &rq->cmd[2]); | |
701 | put_unaligned_be16(nr_sectors, &rq->cmd[7]); | |
702 | ||
703 | len = sdkp->device->sector_size; | |
704 | break; | |
705 | ||
706 | default: | |
09b9cc44 | 707 | ret = BLKPREP_KILL; |
c98a0eb0 | 708 | goto out; |
e339c1a7 MP |
709 | } |
710 | ||
66ac0280 | 711 | blk_add_request_payload(rq, page, len); |
f1126e95 FT |
712 | ret = scsi_setup_blk_pc_cmnd(sdp, rq); |
713 | rq->buffer = page_address(page); | |
26e85fcd | 714 | rq->__data_len = nr_bytes; |
c98a0eb0 MP |
715 | |
716 | out: | |
610a6349 FT |
717 | if (ret != BLKPREP_OK) { |
718 | __free_page(page); | |
719 | rq->buffer = NULL; | |
720 | } | |
f1126e95 FT |
721 | return ret; |
722 | } | |
723 | ||
5db44863 MP |
724 | static void sd_config_write_same(struct scsi_disk *sdkp) |
725 | { | |
726 | struct request_queue *q = sdkp->disk->queue; | |
727 | unsigned int logical_block_size = sdkp->device->sector_size; | |
728 | unsigned int blocks = 0; | |
729 | ||
730 | if (sdkp->device->no_write_same) { | |
731 | sdkp->max_ws_blocks = 0; | |
732 | goto out; | |
733 | } | |
734 | ||
735 | /* Some devices can not handle block counts above 0xffff despite | |
736 | * supporting WRITE SAME(16). Consequently we default to 64k | |
737 | * blocks per I/O unless the device explicitly advertises a | |
738 | * bigger limit. | |
739 | */ | |
740 | if (sdkp->max_ws_blocks == 0) | |
741 | sdkp->max_ws_blocks = SD_MAX_WS10_BLOCKS; | |
742 | ||
743 | if (sdkp->ws16 || sdkp->max_ws_blocks > SD_MAX_WS10_BLOCKS) | |
744 | blocks = min_not_zero(sdkp->max_ws_blocks, | |
745 | (u32)SD_MAX_WS16_BLOCKS); | |
746 | else | |
747 | blocks = min_not_zero(sdkp->max_ws_blocks, | |
748 | (u32)SD_MAX_WS10_BLOCKS); | |
749 | ||
750 | out: | |
751 | blk_queue_max_write_same_sectors(q, blocks * (logical_block_size >> 9)); | |
752 | } | |
753 | ||
754 | /** | |
755 | * sd_setup_write_same_cmnd - write the same data to multiple blocks | |
756 | * @sdp: scsi device to operate one | |
757 | * @rq: Request to prepare | |
758 | * | |
759 | * Will issue either WRITE SAME(10) or WRITE SAME(16) depending on | |
760 | * preference indicated by target device. | |
761 | **/ | |
762 | static int sd_setup_write_same_cmnd(struct scsi_device *sdp, struct request *rq) | |
763 | { | |
764 | struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); | |
765 | struct bio *bio = rq->bio; | |
766 | sector_t sector = blk_rq_pos(rq); | |
767 | unsigned int nr_sectors = blk_rq_sectors(rq); | |
768 | unsigned int nr_bytes = blk_rq_bytes(rq); | |
769 | int ret; | |
770 | ||
771 | if (sdkp->device->no_write_same) | |
772 | return BLKPREP_KILL; | |
773 | ||
774 | BUG_ON(bio_offset(bio) || bio_iovec(bio)->bv_len != sdp->sector_size); | |
775 | ||
776 | sector >>= ilog2(sdp->sector_size) - 9; | |
777 | nr_sectors >>= ilog2(sdp->sector_size) - 9; | |
778 | ||
779 | rq->__data_len = sdp->sector_size; | |
780 | rq->timeout = SD_WRITE_SAME_TIMEOUT; | |
781 | memset(rq->cmd, 0, rq->cmd_len); | |
782 | ||
783 | if (sdkp->ws16 || sector > 0xffffffff || nr_sectors > 0xffff) { | |
784 | rq->cmd_len = 16; | |
785 | rq->cmd[0] = WRITE_SAME_16; | |
786 | put_unaligned_be64(sector, &rq->cmd[2]); | |
787 | put_unaligned_be32(nr_sectors, &rq->cmd[10]); | |
788 | } else { | |
789 | rq->cmd_len = 10; | |
790 | rq->cmd[0] = WRITE_SAME; | |
791 | put_unaligned_be32(sector, &rq->cmd[2]); | |
792 | put_unaligned_be16(nr_sectors, &rq->cmd[7]); | |
793 | } | |
794 | ||
795 | ret = scsi_setup_blk_pc_cmnd(sdp, rq); | |
796 | rq->__data_len = nr_bytes; | |
797 | ||
798 | return ret; | |
799 | } | |
800 | ||
90467c29 FT |
801 | static int scsi_setup_flush_cmnd(struct scsi_device *sdp, struct request *rq) |
802 | { | |
e3b3e624 | 803 | rq->timeout = SD_FLUSH_TIMEOUT; |
90467c29 FT |
804 | rq->retries = SD_MAX_RETRIES; |
805 | rq->cmd[0] = SYNCHRONIZE_CACHE; | |
806 | rq->cmd_len = 10; | |
807 | ||
808 | return scsi_setup_blk_pc_cmnd(sdp, rq); | |
809 | } | |
810 | ||
f1126e95 FT |
811 | static void sd_unprep_fn(struct request_queue *q, struct request *rq) |
812 | { | |
610a6349 FT |
813 | if (rq->cmd_flags & REQ_DISCARD) { |
814 | free_page((unsigned long)rq->buffer); | |
815 | rq->buffer = NULL; | |
816 | } | |
e339c1a7 MP |
817 | } |
818 | ||
1da177e4 | 819 | /** |
2db93ce8 | 820 | * sd_prep_fn - build a scsi (read or write) command from |
1da177e4 LT |
821 | * information in the request structure. |
822 | * @SCpnt: pointer to mid-level's per scsi command structure that | |
823 | * contains request and into which the scsi command is written | |
824 | * | |
825 | * Returns 1 if successful and 0 if error (or cannot be done now). | |
826 | **/ | |
7f9a6bc4 | 827 | static int sd_prep_fn(struct request_queue *q, struct request *rq) |
1da177e4 | 828 | { |
7f9a6bc4 JB |
829 | struct scsi_cmnd *SCpnt; |
830 | struct scsi_device *sdp = q->queuedata; | |
776b23a0 | 831 | struct gendisk *disk = rq->rq_disk; |
af55ff67 | 832 | struct scsi_disk *sdkp; |
83096ebf | 833 | sector_t block = blk_rq_pos(rq); |
18351070 | 834 | sector_t threshold; |
83096ebf | 835 | unsigned int this_count = blk_rq_sectors(rq); |
bd623e79 | 836 | int ret, host_dif; |
4e7392ec | 837 | unsigned char protect; |
7f9a6bc4 | 838 | |
e339c1a7 MP |
839 | /* |
840 | * Discard request come in as REQ_TYPE_FS but we turn them into | |
841 | * block PC requests to make life easier. | |
842 | */ | |
66ac0280 | 843 | if (rq->cmd_flags & REQ_DISCARD) { |
26e85fcd | 844 | ret = sd_setup_discard_cmnd(sdp, rq); |
66ac0280 | 845 | goto out; |
5db44863 MP |
846 | } else if (rq->cmd_flags & REQ_WRITE_SAME) { |
847 | ret = sd_setup_write_same_cmnd(sdp, rq); | |
848 | goto out; | |
90467c29 FT |
849 | } else if (rq->cmd_flags & REQ_FLUSH) { |
850 | ret = scsi_setup_flush_cmnd(sdp, rq); | |
851 | goto out; | |
66ac0280 | 852 | } else if (rq->cmd_type == REQ_TYPE_BLOCK_PC) { |
7f9a6bc4 JB |
853 | ret = scsi_setup_blk_pc_cmnd(sdp, rq); |
854 | goto out; | |
855 | } else if (rq->cmd_type != REQ_TYPE_FS) { | |
856 | ret = BLKPREP_KILL; | |
857 | goto out; | |
858 | } | |
859 | ret = scsi_setup_fs_cmnd(sdp, rq); | |
860 | if (ret != BLKPREP_OK) | |
861 | goto out; | |
862 | SCpnt = rq->special; | |
af55ff67 | 863 | sdkp = scsi_disk(disk); |
7f9a6bc4 JB |
864 | |
865 | /* from here on until we're complete, any goto out | |
866 | * is used for a killable error condition */ | |
867 | ret = BLKPREP_KILL; | |
1da177e4 | 868 | |
fa0d34be | 869 | SCSI_LOG_HLQUEUE(1, scmd_printk(KERN_INFO, SCpnt, |
2db93ce8 | 870 | "sd_prep_fn: block=%llu, " |
fa0d34be MP |
871 | "count=%d\n", |
872 | (unsigned long long)block, | |
873 | this_count)); | |
1da177e4 LT |
874 | |
875 | if (!sdp || !scsi_device_online(sdp) || | |
83096ebf | 876 | block + blk_rq_sectors(rq) > get_capacity(disk)) { |
fa0d34be | 877 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
83096ebf TH |
878 | "Finishing %u sectors\n", |
879 | blk_rq_sectors(rq))); | |
fa0d34be MP |
880 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
881 | "Retry with 0x%p\n", SCpnt)); | |
7f9a6bc4 | 882 | goto out; |
1da177e4 LT |
883 | } |
884 | ||
885 | if (sdp->changed) { | |
886 | /* | |
887 | * quietly refuse to do anything to a changed disc until | |
888 | * the changed bit has been reset | |
889 | */ | |
3ff5588d | 890 | /* printk("SCSI disk has been changed or is not present. Prohibiting further I/O.\n"); */ |
7f9a6bc4 | 891 | goto out; |
1da177e4 | 892 | } |
7f9a6bc4 | 893 | |
a0899d4d | 894 | /* |
18351070 LT |
895 | * Some SD card readers can't handle multi-sector accesses which touch |
896 | * the last one or two hardware sectors. Split accesses as needed. | |
a0899d4d | 897 | */ |
18351070 LT |
898 | threshold = get_capacity(disk) - SD_LAST_BUGGY_SECTORS * |
899 | (sdp->sector_size / 512); | |
900 | ||
901 | if (unlikely(sdp->last_sector_bug && block + this_count > threshold)) { | |
902 | if (block < threshold) { | |
903 | /* Access up to the threshold but not beyond */ | |
904 | this_count = threshold - block; | |
905 | } else { | |
906 | /* Access only a single hardware sector */ | |
907 | this_count = sdp->sector_size / 512; | |
908 | } | |
909 | } | |
a0899d4d | 910 | |
fa0d34be MP |
911 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, "block=%llu\n", |
912 | (unsigned long long)block)); | |
1da177e4 LT |
913 | |
914 | /* | |
915 | * If we have a 1K hardware sectorsize, prevent access to single | |
916 | * 512 byte sectors. In theory we could handle this - in fact | |
917 | * the scsi cdrom driver must be able to handle this because | |
918 | * we typically use 1K blocksizes, and cdroms typically have | |
919 | * 2K hardware sectorsizes. Of course, things are simpler | |
920 | * with the cdrom, since it is read-only. For performance | |
921 | * reasons, the filesystems should be able to handle this | |
922 | * and not force the scsi disk driver to use bounce buffers | |
923 | * for this. | |
924 | */ | |
925 | if (sdp->sector_size == 1024) { | |
83096ebf | 926 | if ((block & 1) || (blk_rq_sectors(rq) & 1)) { |
e73aec82 MP |
927 | scmd_printk(KERN_ERR, SCpnt, |
928 | "Bad block number requested\n"); | |
7f9a6bc4 | 929 | goto out; |
1da177e4 LT |
930 | } else { |
931 | block = block >> 1; | |
932 | this_count = this_count >> 1; | |
933 | } | |
934 | } | |
935 | if (sdp->sector_size == 2048) { | |
83096ebf | 936 | if ((block & 3) || (blk_rq_sectors(rq) & 3)) { |
e73aec82 MP |
937 | scmd_printk(KERN_ERR, SCpnt, |
938 | "Bad block number requested\n"); | |
7f9a6bc4 | 939 | goto out; |
1da177e4 LT |
940 | } else { |
941 | block = block >> 2; | |
942 | this_count = this_count >> 2; | |
943 | } | |
944 | } | |
945 | if (sdp->sector_size == 4096) { | |
83096ebf | 946 | if ((block & 7) || (blk_rq_sectors(rq) & 7)) { |
e73aec82 MP |
947 | scmd_printk(KERN_ERR, SCpnt, |
948 | "Bad block number requested\n"); | |
7f9a6bc4 | 949 | goto out; |
1da177e4 LT |
950 | } else { |
951 | block = block >> 3; | |
952 | this_count = this_count >> 3; | |
953 | } | |
954 | } | |
955 | if (rq_data_dir(rq) == WRITE) { | |
956 | if (!sdp->writeable) { | |
7f9a6bc4 | 957 | goto out; |
1da177e4 LT |
958 | } |
959 | SCpnt->cmnd[0] = WRITE_6; | |
960 | SCpnt->sc_data_direction = DMA_TO_DEVICE; | |
af55ff67 | 961 | |
8c579ab6 MP |
962 | if (blk_integrity_rq(rq)) |
963 | sd_dif_prepare(rq, block, sdp->sector_size); | |
af55ff67 | 964 | |
1da177e4 LT |
965 | } else if (rq_data_dir(rq) == READ) { |
966 | SCpnt->cmnd[0] = READ_6; | |
967 | SCpnt->sc_data_direction = DMA_FROM_DEVICE; | |
968 | } else { | |
e73aec82 | 969 | scmd_printk(KERN_ERR, SCpnt, "Unknown command %x\n", rq->cmd_flags); |
7f9a6bc4 | 970 | goto out; |
1da177e4 LT |
971 | } |
972 | ||
fa0d34be | 973 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
83096ebf | 974 | "%s %d/%u 512 byte blocks.\n", |
fa0d34be MP |
975 | (rq_data_dir(rq) == WRITE) ? |
976 | "writing" : "reading", this_count, | |
83096ebf | 977 | blk_rq_sectors(rq))); |
1da177e4 | 978 | |
af55ff67 | 979 | /* Set RDPROTECT/WRPROTECT if disk is formatted with DIF */ |
bd623e79 MP |
980 | host_dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type); |
981 | if (host_dif) | |
4e7392ec | 982 | protect = 1 << 5; |
af55ff67 | 983 | else |
4e7392ec MP |
984 | protect = 0; |
985 | ||
986 | if (host_dif == SD_DIF_TYPE2_PROTECTION) { | |
987 | SCpnt->cmnd = mempool_alloc(sd_cdb_pool, GFP_ATOMIC); | |
988 | ||
989 | if (unlikely(SCpnt->cmnd == NULL)) { | |
990 | ret = BLKPREP_DEFER; | |
991 | goto out; | |
992 | } | |
af55ff67 | 993 | |
4e7392ec MP |
994 | SCpnt->cmd_len = SD_EXT_CDB_SIZE; |
995 | memset(SCpnt->cmnd, 0, SCpnt->cmd_len); | |
996 | SCpnt->cmnd[0] = VARIABLE_LENGTH_CMD; | |
997 | SCpnt->cmnd[7] = 0x18; | |
998 | SCpnt->cmnd[9] = (rq_data_dir(rq) == READ) ? READ_32 : WRITE_32; | |
33659ebb | 999 | SCpnt->cmnd[10] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
4e7392ec MP |
1000 | |
1001 | /* LBA */ | |
1002 | SCpnt->cmnd[12] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0; | |
1003 | SCpnt->cmnd[13] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0; | |
1004 | SCpnt->cmnd[14] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0; | |
1005 | SCpnt->cmnd[15] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0; | |
1006 | SCpnt->cmnd[16] = (unsigned char) (block >> 24) & 0xff; | |
1007 | SCpnt->cmnd[17] = (unsigned char) (block >> 16) & 0xff; | |
1008 | SCpnt->cmnd[18] = (unsigned char) (block >> 8) & 0xff; | |
1009 | SCpnt->cmnd[19] = (unsigned char) block & 0xff; | |
1010 | ||
1011 | /* Expected Indirect LBA */ | |
1012 | SCpnt->cmnd[20] = (unsigned char) (block >> 24) & 0xff; | |
1013 | SCpnt->cmnd[21] = (unsigned char) (block >> 16) & 0xff; | |
1014 | SCpnt->cmnd[22] = (unsigned char) (block >> 8) & 0xff; | |
1015 | SCpnt->cmnd[23] = (unsigned char) block & 0xff; | |
1016 | ||
1017 | /* Transfer length */ | |
1018 | SCpnt->cmnd[28] = (unsigned char) (this_count >> 24) & 0xff; | |
1019 | SCpnt->cmnd[29] = (unsigned char) (this_count >> 16) & 0xff; | |
1020 | SCpnt->cmnd[30] = (unsigned char) (this_count >> 8) & 0xff; | |
1021 | SCpnt->cmnd[31] = (unsigned char) this_count & 0xff; | |
53ad570b | 1022 | } else if (sdp->use_16_for_rw) { |
1da177e4 | 1023 | SCpnt->cmnd[0] += READ_16 - READ_6; |
33659ebb | 1024 | SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
1da177e4 LT |
1025 | SCpnt->cmnd[2] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0; |
1026 | SCpnt->cmnd[3] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0; | |
1027 | SCpnt->cmnd[4] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0; | |
1028 | SCpnt->cmnd[5] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0; | |
1029 | SCpnt->cmnd[6] = (unsigned char) (block >> 24) & 0xff; | |
1030 | SCpnt->cmnd[7] = (unsigned char) (block >> 16) & 0xff; | |
1031 | SCpnt->cmnd[8] = (unsigned char) (block >> 8) & 0xff; | |
1032 | SCpnt->cmnd[9] = (unsigned char) block & 0xff; | |
1033 | SCpnt->cmnd[10] = (unsigned char) (this_count >> 24) & 0xff; | |
1034 | SCpnt->cmnd[11] = (unsigned char) (this_count >> 16) & 0xff; | |
1035 | SCpnt->cmnd[12] = (unsigned char) (this_count >> 8) & 0xff; | |
1036 | SCpnt->cmnd[13] = (unsigned char) this_count & 0xff; | |
1037 | SCpnt->cmnd[14] = SCpnt->cmnd[15] = 0; | |
1038 | } else if ((this_count > 0xff) || (block > 0x1fffff) || | |
af55ff67 | 1039 | scsi_device_protection(SCpnt->device) || |
1da177e4 LT |
1040 | SCpnt->device->use_10_for_rw) { |
1041 | if (this_count > 0xffff) | |
1042 | this_count = 0xffff; | |
1043 | ||
1044 | SCpnt->cmnd[0] += READ_10 - READ_6; | |
33659ebb | 1045 | SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
1da177e4 LT |
1046 | SCpnt->cmnd[2] = (unsigned char) (block >> 24) & 0xff; |
1047 | SCpnt->cmnd[3] = (unsigned char) (block >> 16) & 0xff; | |
1048 | SCpnt->cmnd[4] = (unsigned char) (block >> 8) & 0xff; | |
1049 | SCpnt->cmnd[5] = (unsigned char) block & 0xff; | |
1050 | SCpnt->cmnd[6] = SCpnt->cmnd[9] = 0; | |
1051 | SCpnt->cmnd[7] = (unsigned char) (this_count >> 8) & 0xff; | |
1052 | SCpnt->cmnd[8] = (unsigned char) this_count & 0xff; | |
1053 | } else { | |
33659ebb | 1054 | if (unlikely(rq->cmd_flags & REQ_FUA)) { |
007365ad TH |
1055 | /* |
1056 | * This happens only if this drive failed | |
1057 | * 10byte rw command with ILLEGAL_REQUEST | |
1058 | * during operation and thus turned off | |
1059 | * use_10_for_rw. | |
1060 | */ | |
e73aec82 MP |
1061 | scmd_printk(KERN_ERR, SCpnt, |
1062 | "FUA write on READ/WRITE(6) drive\n"); | |
7f9a6bc4 | 1063 | goto out; |
007365ad TH |
1064 | } |
1065 | ||
1da177e4 LT |
1066 | SCpnt->cmnd[1] |= (unsigned char) ((block >> 16) & 0x1f); |
1067 | SCpnt->cmnd[2] = (unsigned char) ((block >> 8) & 0xff); | |
1068 | SCpnt->cmnd[3] = (unsigned char) block & 0xff; | |
1069 | SCpnt->cmnd[4] = (unsigned char) this_count; | |
1070 | SCpnt->cmnd[5] = 0; | |
1071 | } | |
30b0c37b | 1072 | SCpnt->sdb.length = this_count * sdp->sector_size; |
1da177e4 | 1073 | |
af55ff67 | 1074 | /* If DIF or DIX is enabled, tell HBA how to handle request */ |
bd623e79 | 1075 | if (host_dif || scsi_prot_sg_count(SCpnt)) |
35e1a5d9 | 1076 | sd_prot_op(SCpnt, host_dif); |
af55ff67 | 1077 | |
1da177e4 LT |
1078 | /* |
1079 | * We shouldn't disconnect in the middle of a sector, so with a dumb | |
1080 | * host adapter, it's safe to assume that we can at least transfer | |
1081 | * this many bytes between each connect / disconnect. | |
1082 | */ | |
1083 | SCpnt->transfersize = sdp->sector_size; | |
1084 | SCpnt->underflow = this_count << 9; | |
1085 | SCpnt->allowed = SD_MAX_RETRIES; | |
1da177e4 | 1086 | |
1da177e4 LT |
1087 | /* |
1088 | * This indicates that the command is ready from our end to be | |
1089 | * queued. | |
1090 | */ | |
7f9a6bc4 JB |
1091 | ret = BLKPREP_OK; |
1092 | out: | |
1093 | return scsi_prep_return(q, rq, ret); | |
1da177e4 LT |
1094 | } |
1095 | ||
1096 | /** | |
1097 | * sd_open - open a scsi disk device | |
1098 | * @inode: only i_rdev member may be used | |
1099 | * @filp: only f_mode and f_flags may be used | |
1100 | * | |
1101 | * Returns 0 if successful. Returns a negated errno value in case | |
1102 | * of error. | |
1103 | * | |
1104 | * Note: This can be called from a user context (e.g. fsck(1) ) | |
1105 | * or from within the kernel (e.g. as a result of a mount(1) ). | |
1106 | * In the latter case @inode and @filp carry an abridged amount | |
1107 | * of information as noted above. | |
409f3499 AB |
1108 | * |
1109 | * Locking: called with bdev->bd_mutex held. | |
1da177e4 | 1110 | **/ |
0338e291 | 1111 | static int sd_open(struct block_device *bdev, fmode_t mode) |
1da177e4 | 1112 | { |
0338e291 | 1113 | struct scsi_disk *sdkp = scsi_disk_get(bdev->bd_disk); |
1da177e4 LT |
1114 | struct scsi_device *sdev; |
1115 | int retval; | |
1116 | ||
0338e291 | 1117 | if (!sdkp) |
1da177e4 LT |
1118 | return -ENXIO; |
1119 | ||
fa0d34be | 1120 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_open\n")); |
1da177e4 LT |
1121 | |
1122 | sdev = sdkp->device; | |
1123 | ||
478a8a05 AS |
1124 | retval = scsi_autopm_get_device(sdev); |
1125 | if (retval) | |
1126 | goto error_autopm; | |
1127 | ||
1da177e4 LT |
1128 | /* |
1129 | * If the device is in error recovery, wait until it is done. | |
1130 | * If the device is offline, then disallow any access to it. | |
1131 | */ | |
1132 | retval = -ENXIO; | |
1133 | if (!scsi_block_when_processing_errors(sdev)) | |
1134 | goto error_out; | |
1135 | ||
1136 | if (sdev->removable || sdkp->write_prot) | |
0338e291 | 1137 | check_disk_change(bdev); |
1da177e4 LT |
1138 | |
1139 | /* | |
1140 | * If the drive is empty, just let the open fail. | |
1141 | */ | |
1142 | retval = -ENOMEDIUM; | |
0338e291 | 1143 | if (sdev->removable && !sdkp->media_present && !(mode & FMODE_NDELAY)) |
1da177e4 LT |
1144 | goto error_out; |
1145 | ||
1146 | /* | |
1147 | * If the device has the write protect tab set, have the open fail | |
1148 | * if the user expects to be able to write to the thing. | |
1149 | */ | |
1150 | retval = -EROFS; | |
0338e291 | 1151 | if (sdkp->write_prot && (mode & FMODE_WRITE)) |
1da177e4 LT |
1152 | goto error_out; |
1153 | ||
1154 | /* | |
1155 | * It is possible that the disk changing stuff resulted in | |
1156 | * the device being taken offline. If this is the case, | |
1157 | * report this to the user, and don't pretend that the | |
1158 | * open actually succeeded. | |
1159 | */ | |
1160 | retval = -ENXIO; | |
1161 | if (!scsi_device_online(sdev)) | |
1162 | goto error_out; | |
1163 | ||
409f3499 | 1164 | if ((atomic_inc_return(&sdkp->openers) == 1) && sdev->removable) { |
1da177e4 LT |
1165 | if (scsi_block_when_processing_errors(sdev)) |
1166 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT); | |
1167 | } | |
1168 | ||
1169 | return 0; | |
1170 | ||
1171 | error_out: | |
478a8a05 AS |
1172 | scsi_autopm_put_device(sdev); |
1173 | error_autopm: | |
1da177e4 LT |
1174 | scsi_disk_put(sdkp); |
1175 | return retval; | |
1176 | } | |
1177 | ||
1178 | /** | |
1179 | * sd_release - invoked when the (last) close(2) is called on this | |
1180 | * scsi disk. | |
1181 | * @inode: only i_rdev member may be used | |
1182 | * @filp: only f_mode and f_flags may be used | |
1183 | * | |
1184 | * Returns 0. | |
1185 | * | |
1186 | * Note: may block (uninterruptible) if error recovery is underway | |
1187 | * on this disk. | |
409f3499 AB |
1188 | * |
1189 | * Locking: called with bdev->bd_mutex held. | |
1da177e4 | 1190 | **/ |
0338e291 | 1191 | static int sd_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 1192 | { |
1da177e4 LT |
1193 | struct scsi_disk *sdkp = scsi_disk(disk); |
1194 | struct scsi_device *sdev = sdkp->device; | |
1195 | ||
56937f7b | 1196 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_release\n")); |
1da177e4 | 1197 | |
7e443312 | 1198 | if (atomic_dec_return(&sdkp->openers) == 0 && sdev->removable) { |
1da177e4 LT |
1199 | if (scsi_block_when_processing_errors(sdev)) |
1200 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW); | |
1201 | } | |
1202 | ||
1203 | /* | |
1204 | * XXX and what if there are packets in flight and this close() | |
1205 | * XXX is followed by a "rmmod sd_mod"? | |
1206 | */ | |
478a8a05 AS |
1207 | |
1208 | scsi_autopm_put_device(sdev); | |
1da177e4 LT |
1209 | scsi_disk_put(sdkp); |
1210 | return 0; | |
1211 | } | |
1212 | ||
a885c8c4 | 1213 | static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
1da177e4 LT |
1214 | { |
1215 | struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk); | |
1216 | struct scsi_device *sdp = sdkp->device; | |
1217 | struct Scsi_Host *host = sdp->host; | |
1218 | int diskinfo[4]; | |
1219 | ||
1220 | /* default to most commonly used values */ | |
1221 | diskinfo[0] = 0x40; /* 1 << 6 */ | |
1222 | diskinfo[1] = 0x20; /* 1 << 5 */ | |
1223 | diskinfo[2] = sdkp->capacity >> 11; | |
1224 | ||
1225 | /* override with calculated, extended default, or driver values */ | |
1226 | if (host->hostt->bios_param) | |
1227 | host->hostt->bios_param(sdp, bdev, sdkp->capacity, diskinfo); | |
1228 | else | |
1229 | scsicam_bios_param(bdev, sdkp->capacity, diskinfo); | |
1230 | ||
a885c8c4 CH |
1231 | geo->heads = diskinfo[0]; |
1232 | geo->sectors = diskinfo[1]; | |
1233 | geo->cylinders = diskinfo[2]; | |
1da177e4 LT |
1234 | return 0; |
1235 | } | |
1236 | ||
1237 | /** | |
1238 | * sd_ioctl - process an ioctl | |
1239 | * @inode: only i_rdev/i_bdev members may be used | |
1240 | * @filp: only f_mode and f_flags may be used | |
1241 | * @cmd: ioctl command number | |
1242 | * @arg: this is third argument given to ioctl(2) system call. | |
1243 | * Often contains a pointer. | |
1244 | * | |
25985edc | 1245 | * Returns 0 if successful (some ioctls return positive numbers on |
1da177e4 LT |
1246 | * success as well). Returns a negated errno value in case of error. |
1247 | * | |
1248 | * Note: most ioctls are forward onto the block subsystem or further | |
3a4fa0a2 | 1249 | * down in the scsi subsystem. |
1da177e4 | 1250 | **/ |
0338e291 | 1251 | static int sd_ioctl(struct block_device *bdev, fmode_t mode, |
1da177e4 LT |
1252 | unsigned int cmd, unsigned long arg) |
1253 | { | |
1da177e4 | 1254 | struct gendisk *disk = bdev->bd_disk; |
fe2d1851 NN |
1255 | struct scsi_disk *sdkp = scsi_disk(disk); |
1256 | struct scsi_device *sdp = sdkp->device; | |
1da177e4 LT |
1257 | void __user *p = (void __user *)arg; |
1258 | int error; | |
1259 | ||
fe2d1851 NN |
1260 | SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO, sdkp, "sd_ioctl: disk=%s, " |
1261 | "cmd=0x%x\n", disk->disk_name, cmd)); | |
1da177e4 | 1262 | |
0bfc96cb PB |
1263 | error = scsi_verify_blk_ioctl(bdev, cmd); |
1264 | if (error < 0) | |
1265 | return error; | |
1266 | ||
1da177e4 LT |
1267 | /* |
1268 | * If we are in the middle of error recovery, don't let anyone | |
1269 | * else try and use this device. Also, if error recovery fails, it | |
1270 | * may try and take the device offline, in which case all further | |
1271 | * access to the device is prohibited. | |
1272 | */ | |
83ff6fe8 | 1273 | error = scsi_nonblockable_ioctl(sdp, cmd, p, |
fd4ce1ac | 1274 | (mode & FMODE_NDELAY) != 0); |
1da177e4 | 1275 | if (!scsi_block_when_processing_errors(sdp) || !error) |
8a6cfeb6 | 1276 | goto out; |
1da177e4 | 1277 | |
1da177e4 LT |
1278 | /* |
1279 | * Send SCSI addressing ioctls directly to mid level, send other | |
1280 | * ioctls to block level and then onto mid level if they can't be | |
1281 | * resolved. | |
1282 | */ | |
1283 | switch (cmd) { | |
1284 | case SCSI_IOCTL_GET_IDLUN: | |
1285 | case SCSI_IOCTL_GET_BUS_NUMBER: | |
8a6cfeb6 AB |
1286 | error = scsi_ioctl(sdp, cmd, p); |
1287 | break; | |
1da177e4 | 1288 | default: |
577ebb37 | 1289 | error = scsi_cmd_blk_ioctl(bdev, mode, cmd, p); |
1da177e4 | 1290 | if (error != -ENOTTY) |
8a6cfeb6 AB |
1291 | break; |
1292 | error = scsi_ioctl(sdp, cmd, p); | |
1293 | break; | |
1da177e4 | 1294 | } |
8a6cfeb6 | 1295 | out: |
8a6cfeb6 | 1296 | return error; |
1da177e4 LT |
1297 | } |
1298 | ||
1299 | static void set_media_not_present(struct scsi_disk *sdkp) | |
1300 | { | |
2bae0093 TH |
1301 | if (sdkp->media_present) |
1302 | sdkp->device->changed = 1; | |
1303 | ||
1304 | if (sdkp->device->removable) { | |
1305 | sdkp->media_present = 0; | |
1306 | sdkp->capacity = 0; | |
1307 | } | |
1308 | } | |
1309 | ||
1310 | static int media_not_present(struct scsi_disk *sdkp, | |
1311 | struct scsi_sense_hdr *sshdr) | |
1312 | { | |
1313 | if (!scsi_sense_valid(sshdr)) | |
1314 | return 0; | |
1315 | ||
1316 | /* not invoked for commands that could return deferred errors */ | |
1317 | switch (sshdr->sense_key) { | |
1318 | case UNIT_ATTENTION: | |
1319 | case NOT_READY: | |
1320 | /* medium not present */ | |
1321 | if (sshdr->asc == 0x3A) { | |
1322 | set_media_not_present(sdkp); | |
1323 | return 1; | |
1324 | } | |
1325 | } | |
1326 | return 0; | |
1da177e4 LT |
1327 | } |
1328 | ||
1329 | /** | |
2bae0093 TH |
1330 | * sd_check_events - check media events |
1331 | * @disk: kernel device descriptor | |
1332 | * @clearing: disk events currently being cleared | |
1da177e4 | 1333 | * |
2bae0093 | 1334 | * Returns mask of DISK_EVENT_*. |
1da177e4 LT |
1335 | * |
1336 | * Note: this function is invoked from the block subsystem. | |
1337 | **/ | |
2bae0093 | 1338 | static unsigned int sd_check_events(struct gendisk *disk, unsigned int clearing) |
1da177e4 LT |
1339 | { |
1340 | struct scsi_disk *sdkp = scsi_disk(disk); | |
1341 | struct scsi_device *sdp = sdkp->device; | |
001aac25 | 1342 | struct scsi_sense_hdr *sshdr = NULL; |
1da177e4 LT |
1343 | int retval; |
1344 | ||
2bae0093 | 1345 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_check_events\n")); |
1da177e4 LT |
1346 | |
1347 | /* | |
1348 | * If the device is offline, don't send any commands - just pretend as | |
1349 | * if the command failed. If the device ever comes back online, we | |
1350 | * can deal with it then. It is only because of unrecoverable errors | |
1351 | * that we would ever take a device offline in the first place. | |
1352 | */ | |
285e9670 KS |
1353 | if (!scsi_device_online(sdp)) { |
1354 | set_media_not_present(sdkp); | |
285e9670 KS |
1355 | goto out; |
1356 | } | |
1da177e4 LT |
1357 | |
1358 | /* | |
1359 | * Using TEST_UNIT_READY enables differentiation between drive with | |
1360 | * no cartridge loaded - NOT READY, drive with changed cartridge - | |
1361 | * UNIT ATTENTION, or with same cartridge - GOOD STATUS. | |
1362 | * | |
1363 | * Drives that auto spin down. eg iomega jaz 1G, will be started | |
1364 | * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever | |
1365 | * sd_revalidate() is called. | |
1366 | */ | |
1367 | retval = -ENODEV; | |
285e9670 | 1368 | |
001aac25 | 1369 | if (scsi_block_when_processing_errors(sdp)) { |
4e2247b2 LT |
1370 | retval = scsi_autopm_get_device(sdp); |
1371 | if (retval) | |
1372 | goto out; | |
1373 | ||
001aac25 JB |
1374 | sshdr = kzalloc(sizeof(*sshdr), GFP_KERNEL); |
1375 | retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, SD_MAX_RETRIES, | |
1376 | sshdr); | |
4e2247b2 | 1377 | scsi_autopm_put_device(sdp); |
001aac25 | 1378 | } |
1da177e4 | 1379 | |
2bae0093 TH |
1380 | /* failed to execute TUR, assume media not present */ |
1381 | if (host_byte(retval)) { | |
285e9670 | 1382 | set_media_not_present(sdkp); |
285e9670 KS |
1383 | goto out; |
1384 | } | |
1da177e4 | 1385 | |
2bae0093 TH |
1386 | if (media_not_present(sdkp, sshdr)) |
1387 | goto out; | |
1388 | ||
1da177e4 LT |
1389 | /* |
1390 | * For removable scsi disk we have to recognise the presence | |
2bae0093 | 1391 | * of a disk in the drive. |
1da177e4 | 1392 | */ |
2bae0093 TH |
1393 | if (!sdkp->media_present) |
1394 | sdp->changed = 1; | |
1da177e4 | 1395 | sdkp->media_present = 1; |
285e9670 | 1396 | out: |
3ff5588d | 1397 | /* |
2bae0093 | 1398 | * sdp->changed is set under the following conditions: |
3ff5588d | 1399 | * |
2bae0093 TH |
1400 | * Medium present state has changed in either direction. |
1401 | * Device has indicated UNIT_ATTENTION. | |
3ff5588d | 1402 | */ |
001aac25 | 1403 | kfree(sshdr); |
2bae0093 TH |
1404 | retval = sdp->changed ? DISK_EVENT_MEDIA_CHANGE : 0; |
1405 | sdp->changed = 0; | |
1da177e4 | 1406 | return retval; |
1da177e4 LT |
1407 | } |
1408 | ||
e73aec82 | 1409 | static int sd_sync_cache(struct scsi_disk *sdkp) |
1da177e4 | 1410 | { |
1da177e4 | 1411 | int retries, res; |
e73aec82 | 1412 | struct scsi_device *sdp = sdkp->device; |
ea73a9f2 | 1413 | struct scsi_sense_hdr sshdr; |
1da177e4 LT |
1414 | |
1415 | if (!scsi_device_online(sdp)) | |
1416 | return -ENODEV; | |
1417 | ||
1da177e4 | 1418 | |
1da177e4 LT |
1419 | for (retries = 3; retries > 0; --retries) { |
1420 | unsigned char cmd[10] = { 0 }; | |
1421 | ||
1422 | cmd[0] = SYNCHRONIZE_CACHE; | |
1423 | /* | |
1424 | * Leave the rest of the command zero to indicate | |
1425 | * flush everything. | |
1426 | */ | |
ea73a9f2 | 1427 | res = scsi_execute_req(sdp, cmd, DMA_NONE, NULL, 0, &sshdr, |
e3b3e624 | 1428 | SD_FLUSH_TIMEOUT, SD_MAX_RETRIES, NULL); |
ea73a9f2 | 1429 | if (res == 0) |
1da177e4 LT |
1430 | break; |
1431 | } | |
1432 | ||
e73aec82 MP |
1433 | if (res) { |
1434 | sd_print_result(sdkp, res); | |
1435 | if (driver_byte(res) & DRIVER_SENSE) | |
1436 | sd_print_sense_hdr(sdkp, &sshdr); | |
1da177e4 LT |
1437 | } |
1438 | ||
3721050a TH |
1439 | if (res) |
1440 | return -EIO; | |
1441 | return 0; | |
1da177e4 LT |
1442 | } |
1443 | ||
1da177e4 LT |
1444 | static void sd_rescan(struct device *dev) |
1445 | { | |
39b7f1e2 AS |
1446 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
1447 | ||
1448 | if (sdkp) { | |
f98a8cae | 1449 | revalidate_disk(sdkp->disk); |
39b7f1e2 AS |
1450 | scsi_disk_put(sdkp); |
1451 | } | |
1da177e4 LT |
1452 | } |
1453 | ||
1454 | ||
1455 | #ifdef CONFIG_COMPAT | |
1456 | /* | |
1457 | * This gets directly called from VFS. When the ioctl | |
1458 | * is not recognized we go back to the other translation paths. | |
1459 | */ | |
0338e291 AV |
1460 | static int sd_compat_ioctl(struct block_device *bdev, fmode_t mode, |
1461 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1462 | { |
0338e291 | 1463 | struct scsi_device *sdev = scsi_disk(bdev->bd_disk)->device; |
0bfc96cb PB |
1464 | int ret; |
1465 | ||
1466 | ret = scsi_verify_blk_ioctl(bdev, cmd); | |
1467 | if (ret < 0) | |
1468 | return ret; | |
1da177e4 LT |
1469 | |
1470 | /* | |
1471 | * If we are in the middle of error recovery, don't let anyone | |
1472 | * else try and use this device. Also, if error recovery fails, it | |
1473 | * may try and take the device offline, in which case all further | |
1474 | * access to the device is prohibited. | |
1475 | */ | |
1476 | if (!scsi_block_when_processing_errors(sdev)) | |
1477 | return -ENODEV; | |
1478 | ||
1479 | if (sdev->host->hostt->compat_ioctl) { | |
1da177e4 LT |
1480 | ret = sdev->host->hostt->compat_ioctl(sdev, cmd, (void __user *)arg); |
1481 | ||
1482 | return ret; | |
1483 | } | |
1484 | ||
1485 | /* | |
1486 | * Let the static ioctl translation table take care of it. | |
1487 | */ | |
1488 | return -ENOIOCTLCMD; | |
1489 | } | |
1490 | #endif | |
1491 | ||
83d5cde4 | 1492 | static const struct block_device_operations sd_fops = { |
1da177e4 | 1493 | .owner = THIS_MODULE, |
0338e291 AV |
1494 | .open = sd_open, |
1495 | .release = sd_release, | |
8a6cfeb6 | 1496 | .ioctl = sd_ioctl, |
a885c8c4 | 1497 | .getgeo = sd_getgeo, |
1da177e4 | 1498 | #ifdef CONFIG_COMPAT |
0338e291 | 1499 | .compat_ioctl = sd_compat_ioctl, |
1da177e4 | 1500 | #endif |
2bae0093 | 1501 | .check_events = sd_check_events, |
1da177e4 | 1502 | .revalidate_disk = sd_revalidate_disk, |
72ec24bd | 1503 | .unlock_native_capacity = sd_unlock_native_capacity, |
1da177e4 LT |
1504 | }; |
1505 | ||
18a4d0a2 MP |
1506 | /** |
1507 | * sd_eh_action - error handling callback | |
1508 | * @scmd: sd-issued command that has failed | |
1509 | * @eh_cmnd: The command that was sent during error handling | |
1510 | * @eh_cmnd_len: Length of eh_cmnd in bytes | |
1511 | * @eh_disp: The recovery disposition suggested by the midlayer | |
1512 | * | |
1513 | * This function is called by the SCSI midlayer upon completion of | |
1514 | * an error handling command (TEST UNIT READY, START STOP UNIT, | |
1515 | * etc.) The command sent to the device by the error handler is | |
1516 | * stored in eh_cmnd. The result of sending the eh command is | |
1517 | * passed in eh_disp. | |
1518 | **/ | |
1519 | static int sd_eh_action(struct scsi_cmnd *scmd, unsigned char *eh_cmnd, | |
1520 | int eh_cmnd_len, int eh_disp) | |
1521 | { | |
1522 | struct scsi_disk *sdkp = scsi_disk(scmd->request->rq_disk); | |
1523 | ||
1524 | if (!scsi_device_online(scmd->device) || | |
1525 | !scsi_medium_access_command(scmd)) | |
1526 | return eh_disp; | |
1527 | ||
1528 | /* | |
1529 | * The device has timed out executing a medium access command. | |
1530 | * However, the TEST UNIT READY command sent during error | |
1531 | * handling completed successfully. Either the device is in the | |
1532 | * process of recovering or has it suffered an internal failure | |
1533 | * that prevents access to the storage medium. | |
1534 | */ | |
1535 | if (host_byte(scmd->result) == DID_TIME_OUT && eh_disp == SUCCESS && | |
1536 | eh_cmnd_len && eh_cmnd[0] == TEST_UNIT_READY) | |
1537 | sdkp->medium_access_timed_out++; | |
1538 | ||
1539 | /* | |
1540 | * If the device keeps failing read/write commands but TEST UNIT | |
1541 | * READY always completes successfully we assume that medium | |
1542 | * access is no longer possible and take the device offline. | |
1543 | */ | |
1544 | if (sdkp->medium_access_timed_out >= sdkp->max_medium_access_timeouts) { | |
1545 | scmd_printk(KERN_ERR, scmd, | |
1546 | "Medium access timeout failure. Offlining disk!\n"); | |
1547 | scsi_device_set_state(scmd->device, SDEV_OFFLINE); | |
1548 | ||
1549 | return FAILED; | |
1550 | } | |
1551 | ||
1552 | return eh_disp; | |
1553 | } | |
1554 | ||
af55ff67 MP |
1555 | static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd) |
1556 | { | |
83096ebf TH |
1557 | u64 start_lba = blk_rq_pos(scmd->request); |
1558 | u64 end_lba = blk_rq_pos(scmd->request) + (scsi_bufflen(scmd) / 512); | |
af55ff67 MP |
1559 | u64 bad_lba; |
1560 | int info_valid; | |
a8733c7b JB |
1561 | /* |
1562 | * resid is optional but mostly filled in. When it's unused, | |
1563 | * its value is zero, so we assume the whole buffer transferred | |
1564 | */ | |
1565 | unsigned int transferred = scsi_bufflen(scmd) - scsi_get_resid(scmd); | |
1566 | unsigned int good_bytes; | |
af55ff67 | 1567 | |
33659ebb | 1568 | if (scmd->request->cmd_type != REQ_TYPE_FS) |
af55ff67 MP |
1569 | return 0; |
1570 | ||
1571 | info_valid = scsi_get_sense_info_fld(scmd->sense_buffer, | |
1572 | SCSI_SENSE_BUFFERSIZE, | |
1573 | &bad_lba); | |
1574 | if (!info_valid) | |
1575 | return 0; | |
1576 | ||
1577 | if (scsi_bufflen(scmd) <= scmd->device->sector_size) | |
1578 | return 0; | |
1579 | ||
1580 | if (scmd->device->sector_size < 512) { | |
1581 | /* only legitimate sector_size here is 256 */ | |
1582 | start_lba <<= 1; | |
1583 | end_lba <<= 1; | |
1584 | } else { | |
1585 | /* be careful ... don't want any overflows */ | |
1586 | u64 factor = scmd->device->sector_size / 512; | |
1587 | do_div(start_lba, factor); | |
1588 | do_div(end_lba, factor); | |
1589 | } | |
1590 | ||
1591 | /* The bad lba was reported incorrectly, we have no idea where | |
1592 | * the error is. | |
1593 | */ | |
1594 | if (bad_lba < start_lba || bad_lba >= end_lba) | |
1595 | return 0; | |
1596 | ||
1597 | /* This computation should always be done in terms of | |
1598 | * the resolution of the device's medium. | |
1599 | */ | |
a8733c7b JB |
1600 | good_bytes = (bad_lba - start_lba) * scmd->device->sector_size; |
1601 | return min(good_bytes, transferred); | |
af55ff67 MP |
1602 | } |
1603 | ||
1da177e4 | 1604 | /** |
7b3d9545 | 1605 | * sd_done - bottom half handler: called when the lower level |
1da177e4 LT |
1606 | * driver has completed (successfully or otherwise) a scsi command. |
1607 | * @SCpnt: mid-level's per command structure. | |
1608 | * | |
1609 | * Note: potentially run from within an ISR. Must not block. | |
1610 | **/ | |
7b3d9545 | 1611 | static int sd_done(struct scsi_cmnd *SCpnt) |
1da177e4 LT |
1612 | { |
1613 | int result = SCpnt->result; | |
af55ff67 | 1614 | unsigned int good_bytes = result ? 0 : scsi_bufflen(SCpnt); |
1da177e4 | 1615 | struct scsi_sense_hdr sshdr; |
4e7392ec | 1616 | struct scsi_disk *sdkp = scsi_disk(SCpnt->request->rq_disk); |
26e85fcd | 1617 | struct request *req = SCpnt->request; |
1da177e4 LT |
1618 | int sense_valid = 0; |
1619 | int sense_deferred = 0; | |
c98a0eb0 | 1620 | unsigned char op = SCpnt->cmnd[0]; |
5db44863 | 1621 | unsigned char unmap = SCpnt->cmnd[1] & 8; |
1da177e4 | 1622 | |
5db44863 | 1623 | if (req->cmd_flags & REQ_DISCARD || req->cmd_flags & REQ_WRITE_SAME) { |
26e85fcd MP |
1624 | if (!result) { |
1625 | good_bytes = blk_rq_bytes(req); | |
1626 | scsi_set_resid(SCpnt, 0); | |
1627 | } else { | |
1628 | good_bytes = 0; | |
1629 | scsi_set_resid(SCpnt, blk_rq_bytes(req)); | |
1630 | } | |
1631 | } | |
6a32a8ae | 1632 | |
1da177e4 LT |
1633 | if (result) { |
1634 | sense_valid = scsi_command_normalize_sense(SCpnt, &sshdr); | |
1635 | if (sense_valid) | |
1636 | sense_deferred = scsi_sense_is_deferred(&sshdr); | |
1637 | } | |
1da177e4 | 1638 | #ifdef CONFIG_SCSI_LOGGING |
fa0d34be | 1639 | SCSI_LOG_HLCOMPLETE(1, scsi_print_result(SCpnt)); |
1da177e4 | 1640 | if (sense_valid) { |
fa0d34be | 1641 | SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO, SCpnt, |
7b3d9545 | 1642 | "sd_done: sb[respc,sk,asc," |
fa0d34be MP |
1643 | "ascq]=%x,%x,%x,%x\n", |
1644 | sshdr.response_code, | |
1645 | sshdr.sense_key, sshdr.asc, | |
1646 | sshdr.ascq)); | |
1da177e4 LT |
1647 | } |
1648 | #endif | |
03aba2f7 LT |
1649 | if (driver_byte(result) != DRIVER_SENSE && |
1650 | (!sense_valid || sense_deferred)) | |
1651 | goto out; | |
1652 | ||
18a4d0a2 MP |
1653 | sdkp->medium_access_timed_out = 0; |
1654 | ||
03aba2f7 LT |
1655 | switch (sshdr.sense_key) { |
1656 | case HARDWARE_ERROR: | |
1657 | case MEDIUM_ERROR: | |
af55ff67 | 1658 | good_bytes = sd_completed_bytes(SCpnt); |
03aba2f7 LT |
1659 | break; |
1660 | case RECOVERED_ERROR: | |
af55ff67 MP |
1661 | good_bytes = scsi_bufflen(SCpnt); |
1662 | break; | |
10dab226 JW |
1663 | case NO_SENSE: |
1664 | /* This indicates a false check condition, so ignore it. An | |
1665 | * unknown amount of data was transferred so treat it as an | |
1666 | * error. | |
1667 | */ | |
1668 | scsi_print_sense("sd", SCpnt); | |
1669 | SCpnt->result = 0; | |
1670 | memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); | |
1671 | break; | |
c98a0eb0 MP |
1672 | case ABORTED_COMMAND: |
1673 | if (sshdr.asc == 0x10) /* DIF: Target detected corruption */ | |
1674 | good_bytes = sd_completed_bytes(SCpnt); | |
1675 | break; | |
1676 | case ILLEGAL_REQUEST: | |
1677 | if (sshdr.asc == 0x10) /* DIX: Host detected corruption */ | |
af55ff67 | 1678 | good_bytes = sd_completed_bytes(SCpnt); |
c98a0eb0 | 1679 | /* INVALID COMMAND OPCODE or INVALID FIELD IN CDB */ |
5db44863 MP |
1680 | if (sshdr.asc == 0x20 || sshdr.asc == 0x24) { |
1681 | switch (op) { | |
1682 | case UNMAP: | |
1683 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
1684 | break; | |
1685 | case WRITE_SAME_16: | |
1686 | case WRITE_SAME: | |
1687 | if (unmap) | |
1688 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
1689 | else { | |
1690 | sdkp->device->no_write_same = 1; | |
1691 | sd_config_write_same(sdkp); | |
1692 | ||
1693 | good_bytes = 0; | |
1694 | req->__data_len = blk_rq_bytes(req); | |
1695 | req->cmd_flags |= REQ_QUIET; | |
1696 | } | |
1697 | } | |
1698 | } | |
03aba2f7 LT |
1699 | break; |
1700 | default: | |
1701 | break; | |
1da177e4 | 1702 | } |
03aba2f7 | 1703 | out: |
af55ff67 MP |
1704 | if (rq_data_dir(SCpnt->request) == READ && scsi_prot_sg_count(SCpnt)) |
1705 | sd_dif_complete(SCpnt, good_bytes); | |
1706 | ||
4e7392ec | 1707 | if (scsi_host_dif_capable(sdkp->device->host, sdkp->protection_type) |
77c9cfc5 MP |
1708 | == SD_DIF_TYPE2_PROTECTION && SCpnt->cmnd != SCpnt->request->cmd) { |
1709 | ||
1710 | /* We have to print a failed command here as the | |
1711 | * extended CDB gets freed before scsi_io_completion() | |
1712 | * is called. | |
1713 | */ | |
1714 | if (result) | |
1715 | scsi_print_command(SCpnt); | |
1716 | ||
4e7392ec | 1717 | mempool_free(SCpnt->cmnd, sd_cdb_pool); |
77c9cfc5 MP |
1718 | SCpnt->cmnd = NULL; |
1719 | SCpnt->cmd_len = 0; | |
1720 | } | |
4e7392ec | 1721 | |
7b3d9545 | 1722 | return good_bytes; |
1da177e4 LT |
1723 | } |
1724 | ||
1da177e4 LT |
1725 | /* |
1726 | * spinup disk - called only in sd_revalidate_disk() | |
1727 | */ | |
1728 | static void | |
e73aec82 | 1729 | sd_spinup_disk(struct scsi_disk *sdkp) |
ea73a9f2 | 1730 | { |
1da177e4 | 1731 | unsigned char cmd[10]; |
4451e472 | 1732 | unsigned long spintime_expire = 0; |
1da177e4 LT |
1733 | int retries, spintime; |
1734 | unsigned int the_result; | |
1735 | struct scsi_sense_hdr sshdr; | |
1736 | int sense_valid = 0; | |
1737 | ||
1738 | spintime = 0; | |
1739 | ||
1740 | /* Spin up drives, as required. Only do this at boot time */ | |
1741 | /* Spinup needs to be done for module loads too. */ | |
1742 | do { | |
1743 | retries = 0; | |
1744 | ||
1745 | do { | |
1746 | cmd[0] = TEST_UNIT_READY; | |
1747 | memset((void *) &cmd[1], 0, 9); | |
1748 | ||
ea73a9f2 JB |
1749 | the_result = scsi_execute_req(sdkp->device, cmd, |
1750 | DMA_NONE, NULL, 0, | |
1751 | &sshdr, SD_TIMEOUT, | |
f4f4e47e | 1752 | SD_MAX_RETRIES, NULL); |
1da177e4 | 1753 | |
b4d38e38 AS |
1754 | /* |
1755 | * If the drive has indicated to us that it | |
1756 | * doesn't have any media in it, don't bother | |
1757 | * with any more polling. | |
1758 | */ | |
1759 | if (media_not_present(sdkp, &sshdr)) | |
1760 | return; | |
1761 | ||
1da177e4 | 1762 | if (the_result) |
ea73a9f2 | 1763 | sense_valid = scsi_sense_valid(&sshdr); |
1da177e4 LT |
1764 | retries++; |
1765 | } while (retries < 3 && | |
1766 | (!scsi_status_is_good(the_result) || | |
1767 | ((driver_byte(the_result) & DRIVER_SENSE) && | |
1768 | sense_valid && sshdr.sense_key == UNIT_ATTENTION))); | |
1769 | ||
1da177e4 LT |
1770 | if ((driver_byte(the_result) & DRIVER_SENSE) == 0) { |
1771 | /* no sense, TUR either succeeded or failed | |
1772 | * with a status error */ | |
e73aec82 MP |
1773 | if(!spintime && !scsi_status_is_good(the_result)) { |
1774 | sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n"); | |
1775 | sd_print_result(sdkp, the_result); | |
1776 | } | |
1da177e4 LT |
1777 | break; |
1778 | } | |
1779 | ||
1780 | /* | |
1781 | * The device does not want the automatic start to be issued. | |
1782 | */ | |
33dd6f92 | 1783 | if (sdkp->device->no_start_on_add) |
1da177e4 | 1784 | break; |
1da177e4 | 1785 | |
33dd6f92 MW |
1786 | if (sense_valid && sshdr.sense_key == NOT_READY) { |
1787 | if (sshdr.asc == 4 && sshdr.ascq == 3) | |
1788 | break; /* manual intervention required */ | |
1789 | if (sshdr.asc == 4 && sshdr.ascq == 0xb) | |
1790 | break; /* standby */ | |
1791 | if (sshdr.asc == 4 && sshdr.ascq == 0xc) | |
1792 | break; /* unavailable */ | |
1793 | /* | |
1794 | * Issue command to spin up drive when not ready | |
1795 | */ | |
1da177e4 | 1796 | if (!spintime) { |
e73aec82 | 1797 | sd_printk(KERN_NOTICE, sdkp, "Spinning up disk..."); |
1da177e4 LT |
1798 | cmd[0] = START_STOP; |
1799 | cmd[1] = 1; /* Return immediately */ | |
1800 | memset((void *) &cmd[2], 0, 8); | |
1801 | cmd[4] = 1; /* Start spin cycle */ | |
d2886ea3 SR |
1802 | if (sdkp->device->start_stop_pwr_cond) |
1803 | cmd[4] |= 1 << 4; | |
ea73a9f2 JB |
1804 | scsi_execute_req(sdkp->device, cmd, DMA_NONE, |
1805 | NULL, 0, &sshdr, | |
f4f4e47e FT |
1806 | SD_TIMEOUT, SD_MAX_RETRIES, |
1807 | NULL); | |
4451e472 AS |
1808 | spintime_expire = jiffies + 100 * HZ; |
1809 | spintime = 1; | |
1da177e4 | 1810 | } |
1da177e4 LT |
1811 | /* Wait 1 second for next try */ |
1812 | msleep(1000); | |
1813 | printk("."); | |
4451e472 AS |
1814 | |
1815 | /* | |
1816 | * Wait for USB flash devices with slow firmware. | |
1817 | * Yes, this sense key/ASC combination shouldn't | |
1818 | * occur here. It's characteristic of these devices. | |
1819 | */ | |
1820 | } else if (sense_valid && | |
1821 | sshdr.sense_key == UNIT_ATTENTION && | |
1822 | sshdr.asc == 0x28) { | |
1823 | if (!spintime) { | |
1824 | spintime_expire = jiffies + 5 * HZ; | |
1825 | spintime = 1; | |
1826 | } | |
1827 | /* Wait 1 second for next try */ | |
1828 | msleep(1000); | |
1da177e4 LT |
1829 | } else { |
1830 | /* we don't understand the sense code, so it's | |
1831 | * probably pointless to loop */ | |
1832 | if(!spintime) { | |
e73aec82 MP |
1833 | sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n"); |
1834 | sd_print_sense_hdr(sdkp, &sshdr); | |
1da177e4 LT |
1835 | } |
1836 | break; | |
1837 | } | |
1838 | ||
4451e472 | 1839 | } while (spintime && time_before_eq(jiffies, spintime_expire)); |
1da177e4 LT |
1840 | |
1841 | if (spintime) { | |
1842 | if (scsi_status_is_good(the_result)) | |
1843 | printk("ready\n"); | |
1844 | else | |
1845 | printk("not responding...\n"); | |
1846 | } | |
1847 | } | |
1848 | ||
e0597d70 MP |
1849 | |
1850 | /* | |
1851 | * Determine whether disk supports Data Integrity Field. | |
1852 | */ | |
fe542396 | 1853 | static int sd_read_protection_type(struct scsi_disk *sdkp, unsigned char *buffer) |
e0597d70 MP |
1854 | { |
1855 | struct scsi_device *sdp = sdkp->device; | |
1856 | u8 type; | |
fe542396 | 1857 | int ret = 0; |
e0597d70 MP |
1858 | |
1859 | if (scsi_device_protection(sdp) == 0 || (buffer[12] & 1) == 0) | |
fe542396 | 1860 | return ret; |
35e1a5d9 MP |
1861 | |
1862 | type = ((buffer[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */ | |
1863 | ||
fe542396 MP |
1864 | if (type > SD_DIF_TYPE3_PROTECTION) |
1865 | ret = -ENODEV; | |
1866 | else if (scsi_host_dif_capable(sdp->host, type)) | |
1867 | ret = 1; | |
1868 | ||
1869 | if (sdkp->first_scan || type != sdkp->protection_type) | |
1870 | switch (ret) { | |
1871 | case -ENODEV: | |
1872 | sd_printk(KERN_ERR, sdkp, "formatted with unsupported" \ | |
1873 | " protection type %u. Disabling disk!\n", | |
1874 | type); | |
1875 | break; | |
1876 | case 1: | |
1877 | sd_printk(KERN_NOTICE, sdkp, | |
1878 | "Enabling DIF Type %u protection\n", type); | |
1879 | break; | |
1880 | case 0: | |
1881 | sd_printk(KERN_NOTICE, sdkp, | |
1882 | "Disabling DIF Type %u protection\n", type); | |
1883 | break; | |
1884 | } | |
e0597d70 | 1885 | |
be922f47 MP |
1886 | sdkp->protection_type = type; |
1887 | ||
fe542396 | 1888 | return ret; |
e0597d70 MP |
1889 | } |
1890 | ||
0da205e0 MW |
1891 | static void read_capacity_error(struct scsi_disk *sdkp, struct scsi_device *sdp, |
1892 | struct scsi_sense_hdr *sshdr, int sense_valid, | |
1893 | int the_result) | |
1894 | { | |
1895 | sd_print_result(sdkp, the_result); | |
1896 | if (driver_byte(the_result) & DRIVER_SENSE) | |
1897 | sd_print_sense_hdr(sdkp, sshdr); | |
1898 | else | |
1899 | sd_printk(KERN_NOTICE, sdkp, "Sense not available.\n"); | |
1900 | ||
1901 | /* | |
1902 | * Set dirty bit for removable devices if not ready - | |
1903 | * sometimes drives will not report this properly. | |
1904 | */ | |
1905 | if (sdp->removable && | |
1906 | sense_valid && sshdr->sense_key == NOT_READY) | |
2bae0093 | 1907 | set_media_not_present(sdkp); |
0da205e0 MW |
1908 | |
1909 | /* | |
1910 | * We used to set media_present to 0 here to indicate no media | |
1911 | * in the drive, but some drives fail read capacity even with | |
1912 | * media present, so we can't do that. | |
1913 | */ | |
1914 | sdkp->capacity = 0; /* unknown mapped to zero - as usual */ | |
1915 | } | |
1916 | ||
1917 | #define RC16_LEN 32 | |
1918 | #if RC16_LEN > SD_BUF_SIZE | |
1919 | #error RC16_LEN must not be more than SD_BUF_SIZE | |
1920 | #endif | |
1921 | ||
3233ac19 JB |
1922 | #define READ_CAPACITY_RETRIES_ON_RESET 10 |
1923 | ||
0da205e0 MW |
1924 | static int read_capacity_16(struct scsi_disk *sdkp, struct scsi_device *sdp, |
1925 | unsigned char *buffer) | |
ea73a9f2 | 1926 | { |
1da177e4 | 1927 | unsigned char cmd[16]; |
1da177e4 LT |
1928 | struct scsi_sense_hdr sshdr; |
1929 | int sense_valid = 0; | |
0da205e0 | 1930 | int the_result; |
3233ac19 | 1931 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
ea09bcc9 | 1932 | unsigned int alignment; |
0da205e0 MW |
1933 | unsigned long long lba; |
1934 | unsigned sector_size; | |
1da177e4 | 1935 | |
5ce524bd HG |
1936 | if (sdp->no_read_capacity_16) |
1937 | return -EINVAL; | |
1938 | ||
1da177e4 | 1939 | do { |
0da205e0 MW |
1940 | memset(cmd, 0, 16); |
1941 | cmd[0] = SERVICE_ACTION_IN; | |
1942 | cmd[1] = SAI_READ_CAPACITY_16; | |
1943 | cmd[13] = RC16_LEN; | |
1944 | memset(buffer, 0, RC16_LEN); | |
1945 | ||
ea73a9f2 | 1946 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, |
0da205e0 MW |
1947 | buffer, RC16_LEN, &sshdr, |
1948 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
1da177e4 | 1949 | |
ea73a9f2 | 1950 | if (media_not_present(sdkp, &sshdr)) |
0da205e0 | 1951 | return -ENODEV; |
1da177e4 | 1952 | |
2b301307 | 1953 | if (the_result) { |
ea73a9f2 | 1954 | sense_valid = scsi_sense_valid(&sshdr); |
2b301307 MW |
1955 | if (sense_valid && |
1956 | sshdr.sense_key == ILLEGAL_REQUEST && | |
1957 | (sshdr.asc == 0x20 || sshdr.asc == 0x24) && | |
1958 | sshdr.ascq == 0x00) | |
1959 | /* Invalid Command Operation Code or | |
1960 | * Invalid Field in CDB, just retry | |
1961 | * silently with RC10 */ | |
1962 | return -EINVAL; | |
3233ac19 JB |
1963 | if (sense_valid && |
1964 | sshdr.sense_key == UNIT_ATTENTION && | |
1965 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) | |
1966 | /* Device reset might occur several times, | |
1967 | * give it one more chance */ | |
1968 | if (--reset_retries > 0) | |
1969 | continue; | |
2b301307 | 1970 | } |
1da177e4 LT |
1971 | retries--; |
1972 | ||
1973 | } while (the_result && retries); | |
1974 | ||
0da205e0 | 1975 | if (the_result) { |
e73aec82 | 1976 | sd_printk(KERN_NOTICE, sdkp, "READ CAPACITY(16) failed\n"); |
0da205e0 MW |
1977 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); |
1978 | return -EINVAL; | |
1979 | } | |
e73aec82 | 1980 | |
8f76d151 DH |
1981 | sector_size = get_unaligned_be32(&buffer[8]); |
1982 | lba = get_unaligned_be64(&buffer[0]); | |
0da205e0 | 1983 | |
fe542396 MP |
1984 | if (sd_read_protection_type(sdkp, buffer) < 0) { |
1985 | sdkp->capacity = 0; | |
1986 | return -ENODEV; | |
1987 | } | |
0da205e0 MW |
1988 | |
1989 | if ((sizeof(sdkp->capacity) == 4) && (lba >= 0xffffffffULL)) { | |
1990 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a " | |
1991 | "kernel compiled with support for large block " | |
1992 | "devices.\n"); | |
1993 | sdkp->capacity = 0; | |
1994 | return -EOVERFLOW; | |
1995 | } | |
1996 | ||
ea09bcc9 | 1997 | /* Logical blocks per physical block exponent */ |
526f7c79 | 1998 | sdkp->physical_block_size = (1 << (buffer[13] & 0xf)) * sector_size; |
ea09bcc9 MP |
1999 | |
2000 | /* Lowest aligned logical block */ | |
2001 | alignment = ((buffer[14] & 0x3f) << 8 | buffer[15]) * sector_size; | |
2002 | blk_queue_alignment_offset(sdp->request_queue, alignment); | |
2003 | if (alignment && sdkp->first_scan) | |
2004 | sd_printk(KERN_NOTICE, sdkp, | |
2005 | "physical block alignment offset: %u\n", alignment); | |
2006 | ||
c98a0eb0 MP |
2007 | if (buffer[14] & 0x80) { /* LBPME */ |
2008 | sdkp->lbpme = 1; | |
e339c1a7 | 2009 | |
c98a0eb0 MP |
2010 | if (buffer[14] & 0x40) /* LBPRZ */ |
2011 | sdkp->lbprz = 1; | |
e339c1a7 | 2012 | |
c98a0eb0 | 2013 | sd_config_discard(sdkp, SD_LBP_WS16); |
e339c1a7 MP |
2014 | } |
2015 | ||
0da205e0 MW |
2016 | sdkp->capacity = lba + 1; |
2017 | return sector_size; | |
2018 | } | |
2019 | ||
2020 | static int read_capacity_10(struct scsi_disk *sdkp, struct scsi_device *sdp, | |
2021 | unsigned char *buffer) | |
2022 | { | |
2023 | unsigned char cmd[16]; | |
2024 | struct scsi_sense_hdr sshdr; | |
2025 | int sense_valid = 0; | |
2026 | int the_result; | |
3233ac19 | 2027 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
0da205e0 MW |
2028 | sector_t lba; |
2029 | unsigned sector_size; | |
2030 | ||
2031 | do { | |
2032 | cmd[0] = READ_CAPACITY; | |
2033 | memset(&cmd[1], 0, 9); | |
2034 | memset(buffer, 0, 8); | |
2035 | ||
2036 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, | |
2037 | buffer, 8, &sshdr, | |
2038 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
2039 | ||
2040 | if (media_not_present(sdkp, &sshdr)) | |
2041 | return -ENODEV; | |
2042 | ||
3233ac19 | 2043 | if (the_result) { |
0da205e0 | 2044 | sense_valid = scsi_sense_valid(&sshdr); |
3233ac19 JB |
2045 | if (sense_valid && |
2046 | sshdr.sense_key == UNIT_ATTENTION && | |
2047 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) | |
2048 | /* Device reset might occur several times, | |
2049 | * give it one more chance */ | |
2050 | if (--reset_retries > 0) | |
2051 | continue; | |
2052 | } | |
0da205e0 MW |
2053 | retries--; |
2054 | ||
2055 | } while (the_result && retries); | |
2056 | ||
2057 | if (the_result) { | |
2058 | sd_printk(KERN_NOTICE, sdkp, "READ CAPACITY failed\n"); | |
2059 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); | |
2060 | return -EINVAL; | |
2061 | } | |
2062 | ||
8f76d151 DH |
2063 | sector_size = get_unaligned_be32(&buffer[4]); |
2064 | lba = get_unaligned_be32(&buffer[0]); | |
0da205e0 | 2065 | |
5ce524bd HG |
2066 | if (sdp->no_read_capacity_16 && (lba == 0xffffffff)) { |
2067 | /* Some buggy (usb cardreader) devices return an lba of | |
2068 | 0xffffffff when the want to report a size of 0 (with | |
2069 | which they really mean no media is present) */ | |
2070 | sdkp->capacity = 0; | |
5cc10350 | 2071 | sdkp->physical_block_size = sector_size; |
5ce524bd HG |
2072 | return sector_size; |
2073 | } | |
2074 | ||
0da205e0 MW |
2075 | if ((sizeof(sdkp->capacity) == 4) && (lba == 0xffffffff)) { |
2076 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a " | |
2077 | "kernel compiled with support for large block " | |
2078 | "devices.\n"); | |
2079 | sdkp->capacity = 0; | |
2080 | return -EOVERFLOW; | |
2081 | } | |
2082 | ||
2083 | sdkp->capacity = lba + 1; | |
526f7c79 | 2084 | sdkp->physical_block_size = sector_size; |
0da205e0 MW |
2085 | return sector_size; |
2086 | } | |
2087 | ||
2b301307 MW |
2088 | static int sd_try_rc16_first(struct scsi_device *sdp) |
2089 | { | |
f87146bb HR |
2090 | if (sdp->host->max_cmd_len < 16) |
2091 | return 0; | |
6a0bdffa AS |
2092 | if (sdp->try_rc_10_first) |
2093 | return 0; | |
2b301307 MW |
2094 | if (sdp->scsi_level > SCSI_SPC_2) |
2095 | return 1; | |
2096 | if (scsi_device_protection(sdp)) | |
2097 | return 1; | |
2098 | return 0; | |
2099 | } | |
2100 | ||
0da205e0 MW |
2101 | /* |
2102 | * read disk capacity | |
2103 | */ | |
2104 | static void | |
2105 | sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer) | |
2106 | { | |
2107 | int sector_size; | |
2108 | struct scsi_device *sdp = sdkp->device; | |
70a9b873 | 2109 | sector_t old_capacity = sdkp->capacity; |
0da205e0 | 2110 | |
2b301307 | 2111 | if (sd_try_rc16_first(sdp)) { |
0da205e0 MW |
2112 | sector_size = read_capacity_16(sdkp, sdp, buffer); |
2113 | if (sector_size == -EOVERFLOW) | |
1da177e4 | 2114 | goto got_data; |
2b301307 MW |
2115 | if (sector_size == -ENODEV) |
2116 | return; | |
2117 | if (sector_size < 0) | |
2118 | sector_size = read_capacity_10(sdkp, sdp, buffer); | |
0da205e0 MW |
2119 | if (sector_size < 0) |
2120 | return; | |
1da177e4 | 2121 | } else { |
0da205e0 MW |
2122 | sector_size = read_capacity_10(sdkp, sdp, buffer); |
2123 | if (sector_size == -EOVERFLOW) | |
2124 | goto got_data; | |
2125 | if (sector_size < 0) | |
2126 | return; | |
2127 | if ((sizeof(sdkp->capacity) > 4) && | |
2128 | (sdkp->capacity > 0xffffffffULL)) { | |
2129 | int old_sector_size = sector_size; | |
2130 | sd_printk(KERN_NOTICE, sdkp, "Very big device. " | |
2131 | "Trying to use READ CAPACITY(16).\n"); | |
2132 | sector_size = read_capacity_16(sdkp, sdp, buffer); | |
2133 | if (sector_size < 0) { | |
2134 | sd_printk(KERN_NOTICE, sdkp, | |
2135 | "Using 0xffffffff as device size\n"); | |
2136 | sdkp->capacity = 1 + (sector_t) 0xffffffff; | |
2137 | sector_size = old_sector_size; | |
2138 | goto got_data; | |
2139 | } | |
2140 | } | |
2141 | } | |
1da177e4 | 2142 | |
5c211caa AS |
2143 | /* Some devices are known to return the total number of blocks, |
2144 | * not the highest block number. Some devices have versions | |
2145 | * which do this and others which do not. Some devices we might | |
2146 | * suspect of doing this but we don't know for certain. | |
2147 | * | |
2148 | * If we know the reported capacity is wrong, decrement it. If | |
2149 | * we can only guess, then assume the number of blocks is even | |
2150 | * (usually true but not always) and err on the side of lowering | |
2151 | * the capacity. | |
2152 | */ | |
2153 | if (sdp->fix_capacity || | |
2154 | (sdp->guess_capacity && (sdkp->capacity & 0x01))) { | |
2155 | sd_printk(KERN_INFO, sdkp, "Adjusting the sector count " | |
2156 | "from its reported value: %llu\n", | |
2157 | (unsigned long long) sdkp->capacity); | |
1da177e4 | 2158 | --sdkp->capacity; |
61bf54b7 ON |
2159 | } |
2160 | ||
1da177e4 LT |
2161 | got_data: |
2162 | if (sector_size == 0) { | |
2163 | sector_size = 512; | |
e73aec82 MP |
2164 | sd_printk(KERN_NOTICE, sdkp, "Sector size 0 reported, " |
2165 | "assuming 512.\n"); | |
1da177e4 LT |
2166 | } |
2167 | ||
2168 | if (sector_size != 512 && | |
2169 | sector_size != 1024 && | |
2170 | sector_size != 2048 && | |
2171 | sector_size != 4096 && | |
2172 | sector_size != 256) { | |
e73aec82 MP |
2173 | sd_printk(KERN_NOTICE, sdkp, "Unsupported sector size %d.\n", |
2174 | sector_size); | |
1da177e4 LT |
2175 | /* |
2176 | * The user might want to re-format the drive with | |
2177 | * a supported sectorsize. Once this happens, it | |
2178 | * would be relatively trivial to set the thing up. | |
2179 | * For this reason, we leave the thing in the table. | |
2180 | */ | |
2181 | sdkp->capacity = 0; | |
2182 | /* | |
2183 | * set a bogus sector size so the normal read/write | |
2184 | * logic in the block layer will eventually refuse any | |
2185 | * request on this device without tripping over power | |
2186 | * of two sector size assumptions | |
2187 | */ | |
2188 | sector_size = 512; | |
2189 | } | |
e1defc4f | 2190 | blk_queue_logical_block_size(sdp->request_queue, sector_size); |
7404ad3b | 2191 | |
1da177e4 | 2192 | { |
7404ad3b | 2193 | char cap_str_2[10], cap_str_10[10]; |
520a2c27 | 2194 | u64 sz = (u64)sdkp->capacity << ilog2(sector_size); |
1da177e4 | 2195 | |
7404ad3b JB |
2196 | string_get_size(sz, STRING_UNITS_2, cap_str_2, |
2197 | sizeof(cap_str_2)); | |
2198 | string_get_size(sz, STRING_UNITS_10, cap_str_10, | |
2199 | sizeof(cap_str_10)); | |
1da177e4 | 2200 | |
ea09bcc9 | 2201 | if (sdkp->first_scan || old_capacity != sdkp->capacity) { |
70a9b873 | 2202 | sd_printk(KERN_NOTICE, sdkp, |
ea09bcc9 | 2203 | "%llu %d-byte logical blocks: (%s/%s)\n", |
70a9b873 MP |
2204 | (unsigned long long)sdkp->capacity, |
2205 | sector_size, cap_str_10, cap_str_2); | |
ea09bcc9 | 2206 | |
526f7c79 | 2207 | if (sdkp->physical_block_size != sector_size) |
ea09bcc9 MP |
2208 | sd_printk(KERN_NOTICE, sdkp, |
2209 | "%u-byte physical blocks\n", | |
526f7c79 | 2210 | sdkp->physical_block_size); |
ea09bcc9 | 2211 | } |
1da177e4 LT |
2212 | } |
2213 | ||
53ad570b JH |
2214 | sdp->use_16_for_rw = (sdkp->capacity > 0xffffffff); |
2215 | ||
1da177e4 LT |
2216 | /* Rescale capacity to 512-byte units */ |
2217 | if (sector_size == 4096) | |
2218 | sdkp->capacity <<= 3; | |
2219 | else if (sector_size == 2048) | |
2220 | sdkp->capacity <<= 2; | |
2221 | else if (sector_size == 1024) | |
2222 | sdkp->capacity <<= 1; | |
2223 | else if (sector_size == 256) | |
2224 | sdkp->capacity >>= 1; | |
2225 | ||
526f7c79 MP |
2226 | blk_queue_physical_block_size(sdp->request_queue, |
2227 | sdkp->physical_block_size); | |
1da177e4 LT |
2228 | sdkp->device->sector_size = sector_size; |
2229 | } | |
2230 | ||
2231 | /* called with buffer of length 512 */ | |
2232 | static inline int | |
ea73a9f2 JB |
2233 | sd_do_mode_sense(struct scsi_device *sdp, int dbd, int modepage, |
2234 | unsigned char *buffer, int len, struct scsi_mode_data *data, | |
2235 | struct scsi_sense_hdr *sshdr) | |
1da177e4 | 2236 | { |
ea73a9f2 | 2237 | return scsi_mode_sense(sdp, dbd, modepage, buffer, len, |
1cf72699 | 2238 | SD_TIMEOUT, SD_MAX_RETRIES, data, |
ea73a9f2 | 2239 | sshdr); |
1da177e4 LT |
2240 | } |
2241 | ||
2242 | /* | |
2243 | * read write protect setting, if possible - called only in sd_revalidate_disk() | |
48970800 | 2244 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
2245 | */ |
2246 | static void | |
e73aec82 | 2247 | sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer) |
ea73a9f2 | 2248 | { |
1da177e4 | 2249 | int res; |
ea73a9f2 | 2250 | struct scsi_device *sdp = sdkp->device; |
1da177e4 | 2251 | struct scsi_mode_data data; |
70a9b873 | 2252 | int old_wp = sdkp->write_prot; |
1da177e4 LT |
2253 | |
2254 | set_disk_ro(sdkp->disk, 0); | |
ea73a9f2 | 2255 | if (sdp->skip_ms_page_3f) { |
e73aec82 | 2256 | sd_printk(KERN_NOTICE, sdkp, "Assuming Write Enabled\n"); |
1da177e4 LT |
2257 | return; |
2258 | } | |
2259 | ||
ea73a9f2 JB |
2260 | if (sdp->use_192_bytes_for_3f) { |
2261 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 192, &data, NULL); | |
1da177e4 LT |
2262 | } else { |
2263 | /* | |
2264 | * First attempt: ask for all pages (0x3F), but only 4 bytes. | |
2265 | * We have to start carefully: some devices hang if we ask | |
2266 | * for more than is available. | |
2267 | */ | |
ea73a9f2 | 2268 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 4, &data, NULL); |
1da177e4 LT |
2269 | |
2270 | /* | |
2271 | * Second attempt: ask for page 0 When only page 0 is | |
2272 | * implemented, a request for page 3F may return Sense Key | |
2273 | * 5: Illegal Request, Sense Code 24: Invalid field in | |
2274 | * CDB. | |
2275 | */ | |
2276 | if (!scsi_status_is_good(res)) | |
ea73a9f2 | 2277 | res = sd_do_mode_sense(sdp, 0, 0, buffer, 4, &data, NULL); |
1da177e4 LT |
2278 | |
2279 | /* | |
2280 | * Third attempt: ask 255 bytes, as we did earlier. | |
2281 | */ | |
2282 | if (!scsi_status_is_good(res)) | |
ea73a9f2 JB |
2283 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 255, |
2284 | &data, NULL); | |
1da177e4 LT |
2285 | } |
2286 | ||
2287 | if (!scsi_status_is_good(res)) { | |
e73aec82 MP |
2288 | sd_printk(KERN_WARNING, sdkp, |
2289 | "Test WP failed, assume Write Enabled\n"); | |
1da177e4 LT |
2290 | } else { |
2291 | sdkp->write_prot = ((data.device_specific & 0x80) != 0); | |
2292 | set_disk_ro(sdkp->disk, sdkp->write_prot); | |
70a9b873 MP |
2293 | if (sdkp->first_scan || old_wp != sdkp->write_prot) { |
2294 | sd_printk(KERN_NOTICE, sdkp, "Write Protect is %s\n", | |
2295 | sdkp->write_prot ? "on" : "off"); | |
2296 | sd_printk(KERN_DEBUG, sdkp, | |
2297 | "Mode Sense: %02x %02x %02x %02x\n", | |
2298 | buffer[0], buffer[1], buffer[2], buffer[3]); | |
2299 | } | |
1da177e4 LT |
2300 | } |
2301 | } | |
2302 | ||
2303 | /* | |
2304 | * sd_read_cache_type - called only from sd_revalidate_disk() | |
48970800 | 2305 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
2306 | */ |
2307 | static void | |
e73aec82 | 2308 | sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer) |
631e8a13 | 2309 | { |
1da177e4 | 2310 | int len = 0, res; |
ea73a9f2 | 2311 | struct scsi_device *sdp = sdkp->device; |
1da177e4 | 2312 | |
631e8a13 AV |
2313 | int dbd; |
2314 | int modepage; | |
0bcaa111 | 2315 | int first_len; |
1da177e4 LT |
2316 | struct scsi_mode_data data; |
2317 | struct scsi_sense_hdr sshdr; | |
70a9b873 MP |
2318 | int old_wce = sdkp->WCE; |
2319 | int old_rcd = sdkp->RCD; | |
2320 | int old_dpofua = sdkp->DPOFUA; | |
1da177e4 | 2321 | |
0bcaa111 LT |
2322 | first_len = 4; |
2323 | if (sdp->skip_ms_page_8) { | |
2324 | if (sdp->type == TYPE_RBC) | |
2325 | goto defaults; | |
2326 | else { | |
2327 | if (sdp->skip_ms_page_3f) | |
2328 | goto defaults; | |
2329 | modepage = 0x3F; | |
2330 | if (sdp->use_192_bytes_for_3f) | |
2331 | first_len = 192; | |
2332 | dbd = 0; | |
2333 | } | |
2334 | } else if (sdp->type == TYPE_RBC) { | |
631e8a13 AV |
2335 | modepage = 6; |
2336 | dbd = 8; | |
2337 | } else { | |
2338 | modepage = 8; | |
2339 | dbd = 0; | |
2340 | } | |
2341 | ||
1da177e4 | 2342 | /* cautiously ask */ |
0bcaa111 LT |
2343 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, first_len, |
2344 | &data, &sshdr); | |
1da177e4 LT |
2345 | |
2346 | if (!scsi_status_is_good(res)) | |
2347 | goto bad_sense; | |
2348 | ||
6d73c851 AV |
2349 | if (!data.header_length) { |
2350 | modepage = 6; | |
0bcaa111 | 2351 | first_len = 0; |
e73aec82 | 2352 | sd_printk(KERN_ERR, sdkp, "Missing header in MODE_SENSE response\n"); |
6d73c851 AV |
2353 | } |
2354 | ||
1da177e4 LT |
2355 | /* that went OK, now ask for the proper length */ |
2356 | len = data.length; | |
2357 | ||
2358 | /* | |
2359 | * We're only interested in the first three bytes, actually. | |
2360 | * But the data cache page is defined for the first 20. | |
2361 | */ | |
2362 | if (len < 3) | |
2363 | goto bad_sense; | |
0bcaa111 LT |
2364 | else if (len > SD_BUF_SIZE) { |
2365 | sd_printk(KERN_NOTICE, sdkp, "Truncating mode parameter " | |
2366 | "data from %d to %d bytes\n", len, SD_BUF_SIZE); | |
2367 | len = SD_BUF_SIZE; | |
2368 | } | |
2369 | if (modepage == 0x3F && sdp->use_192_bytes_for_3f) | |
2370 | len = 192; | |
1da177e4 LT |
2371 | |
2372 | /* Get the data */ | |
0bcaa111 LT |
2373 | if (len > first_len) |
2374 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, len, | |
2375 | &data, &sshdr); | |
1da177e4 LT |
2376 | |
2377 | if (scsi_status_is_good(res)) { | |
631e8a13 | 2378 | int offset = data.header_length + data.block_descriptor_length; |
1da177e4 | 2379 | |
0bcaa111 LT |
2380 | while (offset < len) { |
2381 | u8 page_code = buffer[offset] & 0x3F; | |
2382 | u8 spf = buffer[offset] & 0x40; | |
2383 | ||
2384 | if (page_code == 8 || page_code == 6) { | |
2385 | /* We're interested only in the first 3 bytes. | |
2386 | */ | |
2387 | if (len - offset <= 2) { | |
2388 | sd_printk(KERN_ERR, sdkp, "Incomplete " | |
2389 | "mode parameter data\n"); | |
2390 | goto defaults; | |
2391 | } else { | |
2392 | modepage = page_code; | |
2393 | goto Page_found; | |
2394 | } | |
2395 | } else { | |
2396 | /* Go to the next page */ | |
2397 | if (spf && len - offset > 3) | |
2398 | offset += 4 + (buffer[offset+2] << 8) + | |
2399 | buffer[offset+3]; | |
2400 | else if (!spf && len - offset > 1) | |
2401 | offset += 2 + buffer[offset+1]; | |
2402 | else { | |
2403 | sd_printk(KERN_ERR, sdkp, "Incomplete " | |
2404 | "mode parameter data\n"); | |
2405 | goto defaults; | |
2406 | } | |
2407 | } | |
48970800 AV |
2408 | } |
2409 | ||
0bcaa111 LT |
2410 | if (modepage == 0x3F) { |
2411 | sd_printk(KERN_ERR, sdkp, "No Caching mode page " | |
2412 | "present\n"); | |
2413 | goto defaults; | |
2414 | } else if ((buffer[offset] & 0x3f) != modepage) { | |
e73aec82 | 2415 | sd_printk(KERN_ERR, sdkp, "Got wrong page\n"); |
631e8a13 AV |
2416 | goto defaults; |
2417 | } | |
0bcaa111 | 2418 | Page_found: |
631e8a13 AV |
2419 | if (modepage == 8) { |
2420 | sdkp->WCE = ((buffer[offset + 2] & 0x04) != 0); | |
2421 | sdkp->RCD = ((buffer[offset + 2] & 0x01) != 0); | |
2422 | } else { | |
2423 | sdkp->WCE = ((buffer[offset + 2] & 0x01) == 0); | |
2424 | sdkp->RCD = 0; | |
2425 | } | |
1da177e4 | 2426 | |
007365ad TH |
2427 | sdkp->DPOFUA = (data.device_specific & 0x10) != 0; |
2428 | if (sdkp->DPOFUA && !sdkp->device->use_10_for_rw) { | |
e73aec82 MP |
2429 | sd_printk(KERN_NOTICE, sdkp, |
2430 | "Uses READ/WRITE(6), disabling FUA\n"); | |
007365ad TH |
2431 | sdkp->DPOFUA = 0; |
2432 | } | |
2433 | ||
70a9b873 MP |
2434 | if (sdkp->first_scan || old_wce != sdkp->WCE || |
2435 | old_rcd != sdkp->RCD || old_dpofua != sdkp->DPOFUA) | |
2436 | sd_printk(KERN_NOTICE, sdkp, | |
2437 | "Write cache: %s, read cache: %s, %s\n", | |
2438 | sdkp->WCE ? "enabled" : "disabled", | |
2439 | sdkp->RCD ? "disabled" : "enabled", | |
2440 | sdkp->DPOFUA ? "supports DPO and FUA" | |
2441 | : "doesn't support DPO or FUA"); | |
1da177e4 LT |
2442 | |
2443 | return; | |
2444 | } | |
2445 | ||
2446 | bad_sense: | |
ea73a9f2 | 2447 | if (scsi_sense_valid(&sshdr) && |
1da177e4 LT |
2448 | sshdr.sense_key == ILLEGAL_REQUEST && |
2449 | sshdr.asc == 0x24 && sshdr.ascq == 0x0) | |
e73aec82 MP |
2450 | /* Invalid field in CDB */ |
2451 | sd_printk(KERN_NOTICE, sdkp, "Cache data unavailable\n"); | |
1da177e4 | 2452 | else |
e73aec82 | 2453 | sd_printk(KERN_ERR, sdkp, "Asking for cache data failed\n"); |
1da177e4 LT |
2454 | |
2455 | defaults: | |
b81478d8 NJ |
2456 | if (sdp->wce_default_on) { |
2457 | sd_printk(KERN_NOTICE, sdkp, "Assuming drive cache: write back\n"); | |
2458 | sdkp->WCE = 1; | |
2459 | } else { | |
2460 | sd_printk(KERN_ERR, sdkp, "Assuming drive cache: write through\n"); | |
2461 | sdkp->WCE = 0; | |
2462 | } | |
1da177e4 | 2463 | sdkp->RCD = 0; |
48970800 | 2464 | sdkp->DPOFUA = 0; |
1da177e4 LT |
2465 | } |
2466 | ||
e0597d70 MP |
2467 | /* |
2468 | * The ATO bit indicates whether the DIF application tag is available | |
2469 | * for use by the operating system. | |
2470 | */ | |
439d77f7 | 2471 | static void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer) |
e0597d70 MP |
2472 | { |
2473 | int res, offset; | |
2474 | struct scsi_device *sdp = sdkp->device; | |
2475 | struct scsi_mode_data data; | |
2476 | struct scsi_sense_hdr sshdr; | |
2477 | ||
2478 | if (sdp->type != TYPE_DISK) | |
2479 | return; | |
2480 | ||
2481 | if (sdkp->protection_type == 0) | |
2482 | return; | |
2483 | ||
2484 | res = scsi_mode_sense(sdp, 1, 0x0a, buffer, 36, SD_TIMEOUT, | |
2485 | SD_MAX_RETRIES, &data, &sshdr); | |
2486 | ||
2487 | if (!scsi_status_is_good(res) || !data.header_length || | |
2488 | data.length < 6) { | |
2489 | sd_printk(KERN_WARNING, sdkp, | |
2490 | "getting Control mode page failed, assume no ATO\n"); | |
2491 | ||
2492 | if (scsi_sense_valid(&sshdr)) | |
2493 | sd_print_sense_hdr(sdkp, &sshdr); | |
2494 | ||
2495 | return; | |
2496 | } | |
2497 | ||
2498 | offset = data.header_length + data.block_descriptor_length; | |
2499 | ||
2500 | if ((buffer[offset] & 0x3f) != 0x0a) { | |
2501 | sd_printk(KERN_ERR, sdkp, "ATO Got wrong page\n"); | |
2502 | return; | |
2503 | } | |
2504 | ||
2505 | if ((buffer[offset + 5] & 0x80) == 0) | |
2506 | return; | |
2507 | ||
2508 | sdkp->ATO = 1; | |
2509 | ||
2510 | return; | |
2511 | } | |
2512 | ||
d11b6916 MP |
2513 | /** |
2514 | * sd_read_block_limits - Query disk device for preferred I/O sizes. | |
2515 | * @disk: disk to query | |
2516 | */ | |
2517 | static void sd_read_block_limits(struct scsi_disk *sdkp) | |
2518 | { | |
2519 | unsigned int sector_sz = sdkp->device->sector_size; | |
bb2d3de1 | 2520 | const int vpd_len = 64; |
e3deec09 | 2521 | unsigned char *buffer = kmalloc(vpd_len, GFP_KERNEL); |
d11b6916 | 2522 | |
e3deec09 JB |
2523 | if (!buffer || |
2524 | /* Block Limits VPD */ | |
2525 | scsi_get_vpd_page(sdkp->device, 0xb0, buffer, vpd_len)) | |
2526 | goto out; | |
d11b6916 MP |
2527 | |
2528 | blk_queue_io_min(sdkp->disk->queue, | |
2529 | get_unaligned_be16(&buffer[6]) * sector_sz); | |
2530 | blk_queue_io_opt(sdkp->disk->queue, | |
2531 | get_unaligned_be32(&buffer[12]) * sector_sz); | |
2532 | ||
c98a0eb0 MP |
2533 | if (buffer[3] == 0x3c) { |
2534 | unsigned int lba_count, desc_count; | |
e339c1a7 | 2535 | |
5db44863 | 2536 | sdkp->max_ws_blocks = (u32)get_unaligned_be64(&buffer[36]); |
e339c1a7 | 2537 | |
c98a0eb0 | 2538 | if (!sdkp->lbpme) |
045d3fe7 | 2539 | goto out; |
045d3fe7 | 2540 | |
c98a0eb0 MP |
2541 | lba_count = get_unaligned_be32(&buffer[20]); |
2542 | desc_count = get_unaligned_be32(&buffer[24]); | |
045d3fe7 | 2543 | |
c98a0eb0 MP |
2544 | if (lba_count && desc_count) |
2545 | sdkp->max_unmap_blocks = lba_count; | |
e339c1a7 | 2546 | |
c98a0eb0 | 2547 | sdkp->unmap_granularity = get_unaligned_be32(&buffer[28]); |
e339c1a7 MP |
2548 | |
2549 | if (buffer[32] & 0x80) | |
c98a0eb0 | 2550 | sdkp->unmap_alignment = |
e339c1a7 | 2551 | get_unaligned_be32(&buffer[32]) & ~(1 << 31); |
c98a0eb0 MP |
2552 | |
2553 | if (!sdkp->lbpvpd) { /* LBP VPD page not provided */ | |
2554 | ||
2555 | if (sdkp->max_unmap_blocks) | |
2556 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
2557 | else | |
2558 | sd_config_discard(sdkp, SD_LBP_WS16); | |
2559 | ||
2560 | } else { /* LBP VPD page tells us what to use */ | |
2561 | ||
2562 | if (sdkp->lbpu && sdkp->max_unmap_blocks) | |
2563 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
2564 | else if (sdkp->lbpws) | |
2565 | sd_config_discard(sdkp, SD_LBP_WS16); | |
2566 | else if (sdkp->lbpws10) | |
2567 | sd_config_discard(sdkp, SD_LBP_WS10); | |
2568 | else | |
2569 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
2570 | } | |
e339c1a7 MP |
2571 | } |
2572 | ||
e3deec09 | 2573 | out: |
d11b6916 MP |
2574 | kfree(buffer); |
2575 | } | |
2576 | ||
3821d768 MP |
2577 | /** |
2578 | * sd_read_block_characteristics - Query block dev. characteristics | |
2579 | * @disk: disk to query | |
2580 | */ | |
2581 | static void sd_read_block_characteristics(struct scsi_disk *sdkp) | |
2582 | { | |
e3deec09 | 2583 | unsigned char *buffer; |
3821d768 | 2584 | u16 rot; |
bb2d3de1 | 2585 | const int vpd_len = 64; |
3821d768 | 2586 | |
e3deec09 | 2587 | buffer = kmalloc(vpd_len, GFP_KERNEL); |
3821d768 | 2588 | |
e3deec09 JB |
2589 | if (!buffer || |
2590 | /* Block Device Characteristics VPD */ | |
2591 | scsi_get_vpd_page(sdkp->device, 0xb1, buffer, vpd_len)) | |
2592 | goto out; | |
3821d768 MP |
2593 | |
2594 | rot = get_unaligned_be16(&buffer[4]); | |
2595 | ||
2596 | if (rot == 1) | |
2597 | queue_flag_set_unlocked(QUEUE_FLAG_NONROT, sdkp->disk->queue); | |
2598 | ||
e3deec09 | 2599 | out: |
3821d768 MP |
2600 | kfree(buffer); |
2601 | } | |
2602 | ||
045d3fe7 | 2603 | /** |
c98a0eb0 | 2604 | * sd_read_block_provisioning - Query provisioning VPD page |
045d3fe7 MP |
2605 | * @disk: disk to query |
2606 | */ | |
c98a0eb0 | 2607 | static void sd_read_block_provisioning(struct scsi_disk *sdkp) |
045d3fe7 MP |
2608 | { |
2609 | unsigned char *buffer; | |
2610 | const int vpd_len = 8; | |
2611 | ||
c98a0eb0 | 2612 | if (sdkp->lbpme == 0) |
045d3fe7 MP |
2613 | return; |
2614 | ||
2615 | buffer = kmalloc(vpd_len, GFP_KERNEL); | |
2616 | ||
2617 | if (!buffer || scsi_get_vpd_page(sdkp->device, 0xb2, buffer, vpd_len)) | |
2618 | goto out; | |
2619 | ||
c98a0eb0 MP |
2620 | sdkp->lbpvpd = 1; |
2621 | sdkp->lbpu = (buffer[5] >> 7) & 1; /* UNMAP */ | |
2622 | sdkp->lbpws = (buffer[5] >> 6) & 1; /* WRITE SAME(16) with UNMAP */ | |
2623 | sdkp->lbpws10 = (buffer[5] >> 5) & 1; /* WRITE SAME(10) with UNMAP */ | |
045d3fe7 MP |
2624 | |
2625 | out: | |
2626 | kfree(buffer); | |
2627 | } | |
2628 | ||
5db44863 MP |
2629 | static void sd_read_write_same(struct scsi_disk *sdkp, unsigned char *buffer) |
2630 | { | |
2631 | if (scsi_report_opcode(sdkp->device, buffer, SD_BUF_SIZE, | |
2632 | WRITE_SAME_16)) | |
2633 | sdkp->ws16 = 1; | |
2634 | } | |
2635 | ||
ffd4bc2a MP |
2636 | static int sd_try_extended_inquiry(struct scsi_device *sdp) |
2637 | { | |
2638 | /* | |
2639 | * Although VPD inquiries can go to SCSI-2 type devices, | |
2640 | * some USB ones crash on receiving them, and the pages | |
2641 | * we currently ask for are for SPC-3 and beyond | |
2642 | */ | |
09b6b51b | 2643 | if (sdp->scsi_level > SCSI_SPC_2 && !sdp->skip_vpd_pages) |
ffd4bc2a MP |
2644 | return 1; |
2645 | return 0; | |
2646 | } | |
2647 | ||
1da177e4 LT |
2648 | /** |
2649 | * sd_revalidate_disk - called the first time a new disk is seen, | |
2650 | * performs disk spin up, read_capacity, etc. | |
2651 | * @disk: struct gendisk we care about | |
2652 | **/ | |
2653 | static int sd_revalidate_disk(struct gendisk *disk) | |
2654 | { | |
2655 | struct scsi_disk *sdkp = scsi_disk(disk); | |
2656 | struct scsi_device *sdp = sdkp->device; | |
1da177e4 | 2657 | unsigned char *buffer; |
4913efe4 | 2658 | unsigned flush = 0; |
1da177e4 | 2659 | |
fa0d34be MP |
2660 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, |
2661 | "sd_revalidate_disk\n")); | |
1da177e4 LT |
2662 | |
2663 | /* | |
2664 | * If the device is offline, don't try and read capacity or any | |
2665 | * of the other niceties. | |
2666 | */ | |
2667 | if (!scsi_device_online(sdp)) | |
2668 | goto out; | |
2669 | ||
a6123f14 | 2670 | buffer = kmalloc(SD_BUF_SIZE, GFP_KERNEL); |
1da177e4 | 2671 | if (!buffer) { |
e73aec82 MP |
2672 | sd_printk(KERN_WARNING, sdkp, "sd_revalidate_disk: Memory " |
2673 | "allocation failure.\n"); | |
ea73a9f2 | 2674 | goto out; |
1da177e4 LT |
2675 | } |
2676 | ||
e73aec82 | 2677 | sd_spinup_disk(sdkp); |
1da177e4 LT |
2678 | |
2679 | /* | |
2680 | * Without media there is no reason to ask; moreover, some devices | |
2681 | * react badly if we do. | |
2682 | */ | |
2683 | if (sdkp->media_present) { | |
e73aec82 | 2684 | sd_read_capacity(sdkp, buffer); |
ffd4bc2a MP |
2685 | |
2686 | if (sd_try_extended_inquiry(sdp)) { | |
c98a0eb0 | 2687 | sd_read_block_provisioning(sdkp); |
ffd4bc2a MP |
2688 | sd_read_block_limits(sdkp); |
2689 | sd_read_block_characteristics(sdkp); | |
2690 | } | |
2691 | ||
e73aec82 MP |
2692 | sd_read_write_protect_flag(sdkp, buffer); |
2693 | sd_read_cache_type(sdkp, buffer); | |
e0597d70 | 2694 | sd_read_app_tag_own(sdkp, buffer); |
5db44863 | 2695 | sd_read_write_same(sdkp, buffer); |
1da177e4 | 2696 | } |
461d4e90 | 2697 | |
70a9b873 MP |
2698 | sdkp->first_scan = 0; |
2699 | ||
461d4e90 TH |
2700 | /* |
2701 | * We now have all cache related info, determine how we deal | |
4913efe4 | 2702 | * with flush requests. |
461d4e90 | 2703 | */ |
4913efe4 TH |
2704 | if (sdkp->WCE) { |
2705 | flush |= REQ_FLUSH; | |
2706 | if (sdkp->DPOFUA) | |
2707 | flush |= REQ_FUA; | |
2708 | } | |
461d4e90 | 2709 | |
4913efe4 | 2710 | blk_queue_flush(sdkp->disk->queue, flush); |
461d4e90 | 2711 | |
1da177e4 | 2712 | set_capacity(disk, sdkp->capacity); |
5db44863 | 2713 | sd_config_write_same(sdkp); |
1da177e4 LT |
2714 | kfree(buffer); |
2715 | ||
1da177e4 LT |
2716 | out: |
2717 | return 0; | |
2718 | } | |
2719 | ||
72ec24bd TH |
2720 | /** |
2721 | * sd_unlock_native_capacity - unlock native capacity | |
2722 | * @disk: struct gendisk to set capacity for | |
2723 | * | |
2724 | * Block layer calls this function if it detects that partitions | |
2725 | * on @disk reach beyond the end of the device. If the SCSI host | |
2726 | * implements ->unlock_native_capacity() method, it's invoked to | |
2727 | * give it a chance to adjust the device capacity. | |
2728 | * | |
2729 | * CONTEXT: | |
2730 | * Defined by block layer. Might sleep. | |
2731 | */ | |
2732 | static void sd_unlock_native_capacity(struct gendisk *disk) | |
2733 | { | |
2734 | struct scsi_device *sdev = scsi_disk(disk)->device; | |
2735 | ||
2736 | if (sdev->host->hostt->unlock_native_capacity) | |
2737 | sdev->host->hostt->unlock_native_capacity(sdev); | |
2738 | } | |
2739 | ||
3e1a7ff8 TH |
2740 | /** |
2741 | * sd_format_disk_name - format disk name | |
2742 | * @prefix: name prefix - ie. "sd" for SCSI disks | |
2743 | * @index: index of the disk to format name for | |
2744 | * @buf: output buffer | |
2745 | * @buflen: length of the output buffer | |
2746 | * | |
2747 | * SCSI disk names starts at sda. The 26th device is sdz and the | |
2748 | * 27th is sdaa. The last one for two lettered suffix is sdzz | |
2749 | * which is followed by sdaaa. | |
2750 | * | |
2751 | * This is basically 26 base counting with one extra 'nil' entry | |
3ad2f3fb | 2752 | * at the beginning from the second digit on and can be |
3e1a7ff8 TH |
2753 | * determined using similar method as 26 base conversion with the |
2754 | * index shifted -1 after each digit is computed. | |
2755 | * | |
2756 | * CONTEXT: | |
2757 | * Don't care. | |
2758 | * | |
2759 | * RETURNS: | |
2760 | * 0 on success, -errno on failure. | |
2761 | */ | |
2762 | static int sd_format_disk_name(char *prefix, int index, char *buf, int buflen) | |
2763 | { | |
2764 | const int base = 'z' - 'a' + 1; | |
2765 | char *begin = buf + strlen(prefix); | |
2766 | char *end = buf + buflen; | |
2767 | char *p; | |
2768 | int unit; | |
2769 | ||
2770 | p = end - 1; | |
2771 | *p = '\0'; | |
2772 | unit = base; | |
2773 | do { | |
2774 | if (p == begin) | |
2775 | return -EINVAL; | |
2776 | *--p = 'a' + (index % unit); | |
2777 | index = (index / unit) - 1; | |
2778 | } while (index >= 0); | |
2779 | ||
2780 | memmove(begin, p, end - p); | |
2781 | memcpy(buf, prefix, strlen(prefix)); | |
2782 | ||
2783 | return 0; | |
2784 | } | |
2785 | ||
4ace92fc AV |
2786 | /* |
2787 | * The asynchronous part of sd_probe | |
2788 | */ | |
2789 | static void sd_probe_async(void *data, async_cookie_t cookie) | |
2790 | { | |
2791 | struct scsi_disk *sdkp = data; | |
2792 | struct scsi_device *sdp; | |
2793 | struct gendisk *gd; | |
2794 | u32 index; | |
2795 | struct device *dev; | |
2796 | ||
2797 | sdp = sdkp->device; | |
2798 | gd = sdkp->disk; | |
2799 | index = sdkp->index; | |
2800 | dev = &sdp->sdev_gendev; | |
2801 | ||
1a03ae0f MR |
2802 | gd->major = sd_major((index & 0xf0) >> 4); |
2803 | gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00); | |
2804 | gd->minors = SD_MINORS; | |
2805 | ||
4ace92fc AV |
2806 | gd->fops = &sd_fops; |
2807 | gd->private_data = &sdkp->driver; | |
2808 | gd->queue = sdkp->device->request_queue; | |
2809 | ||
70a9b873 MP |
2810 | /* defaults, until the device tells us otherwise */ |
2811 | sdp->sector_size = 512; | |
2812 | sdkp->capacity = 0; | |
2813 | sdkp->media_present = 1; | |
2814 | sdkp->write_prot = 0; | |
2815 | sdkp->WCE = 0; | |
2816 | sdkp->RCD = 0; | |
2817 | sdkp->ATO = 0; | |
2818 | sdkp->first_scan = 1; | |
18a4d0a2 | 2819 | sdkp->max_medium_access_timeouts = SD_MAX_MEDIUM_TIMEOUTS; |
70a9b873 | 2820 | |
4ace92fc AV |
2821 | sd_revalidate_disk(gd); |
2822 | ||
2823 | blk_queue_prep_rq(sdp->request_queue, sd_prep_fn); | |
f1126e95 | 2824 | blk_queue_unprep_rq(sdp->request_queue, sd_unprep_fn); |
4ace92fc AV |
2825 | |
2826 | gd->driverfs_dev = &sdp->sdev_gendev; | |
97fedbbe | 2827 | gd->flags = GENHD_FL_EXT_DEVT; |
2bae0093 | 2828 | if (sdp->removable) { |
4ace92fc | 2829 | gd->flags |= GENHD_FL_REMOVABLE; |
2bae0093 TH |
2830 | gd->events |= DISK_EVENT_MEDIA_CHANGE; |
2831 | } | |
4ace92fc | 2832 | |
4ace92fc | 2833 | add_disk(gd); |
fe542396 MP |
2834 | if (sdkp->capacity) |
2835 | sd_dif_config_host(sdkp); | |
4ace92fc | 2836 | |
3821d768 MP |
2837 | sd_revalidate_disk(gd); |
2838 | ||
4ace92fc AV |
2839 | sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n", |
2840 | sdp->removable ? "removable " : ""); | |
478a8a05 | 2841 | scsi_autopm_put_device(sdp); |
ea038f63 | 2842 | put_device(&sdkp->dev); |
4ace92fc AV |
2843 | } |
2844 | ||
1da177e4 LT |
2845 | /** |
2846 | * sd_probe - called during driver initialization and whenever a | |
2847 | * new scsi device is attached to the system. It is called once | |
2848 | * for each scsi device (not just disks) present. | |
2849 | * @dev: pointer to device object | |
2850 | * | |
2851 | * Returns 0 if successful (or not interested in this scsi device | |
2852 | * (e.g. scanner)); 1 when there is an error. | |
2853 | * | |
2854 | * Note: this function is invoked from the scsi mid-level. | |
2855 | * This function sets up the mapping between a given | |
2856 | * <host,channel,id,lun> (found in sdp) and new device name | |
2857 | * (e.g. /dev/sda). More precisely it is the block device major | |
2858 | * and minor number that is chosen here. | |
2859 | * | |
2db93ce8 PU |
2860 | * Assume sd_probe is not re-entrant (for time being) |
2861 | * Also think about sd_probe() and sd_remove() running coincidentally. | |
1da177e4 LT |
2862 | **/ |
2863 | static int sd_probe(struct device *dev) | |
2864 | { | |
2865 | struct scsi_device *sdp = to_scsi_device(dev); | |
2866 | struct scsi_disk *sdkp; | |
2867 | struct gendisk *gd; | |
439d77f7 | 2868 | int index; |
1da177e4 LT |
2869 | int error; |
2870 | ||
2871 | error = -ENODEV; | |
631e8a13 | 2872 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_MOD && sdp->type != TYPE_RBC) |
1da177e4 LT |
2873 | goto out; |
2874 | ||
9ccfc756 | 2875 | SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO, sdp, |
2db93ce8 | 2876 | "sd_probe\n")); |
1da177e4 LT |
2877 | |
2878 | error = -ENOMEM; | |
24669f75 | 2879 | sdkp = kzalloc(sizeof(*sdkp), GFP_KERNEL); |
1da177e4 LT |
2880 | if (!sdkp) |
2881 | goto out; | |
2882 | ||
689d6fac | 2883 | gd = alloc_disk(SD_MINORS); |
1da177e4 LT |
2884 | if (!gd) |
2885 | goto out_free; | |
2886 | ||
f27bac27 TH |
2887 | do { |
2888 | if (!ida_pre_get(&sd_index_ida, GFP_KERNEL)) | |
2889 | goto out_put; | |
1da177e4 | 2890 | |
4034cc68 | 2891 | spin_lock(&sd_index_lock); |
f27bac27 | 2892 | error = ida_get_new(&sd_index_ida, &index); |
4034cc68 | 2893 | spin_unlock(&sd_index_lock); |
f27bac27 | 2894 | } while (error == -EAGAIN); |
1da177e4 | 2895 | |
21208ae5 DK |
2896 | if (error) { |
2897 | sdev_printk(KERN_WARNING, sdp, "sd_probe: memory exhausted.\n"); | |
1da177e4 | 2898 | goto out_put; |
1a03ae0f MR |
2899 | } |
2900 | ||
3e1a7ff8 | 2901 | error = sd_format_disk_name("sd", index, gd->disk_name, DISK_NAME_LEN); |
21208ae5 DK |
2902 | if (error) { |
2903 | sdev_printk(KERN_WARNING, sdp, "SCSI disk (sd) name length exceeded.\n"); | |
f27bac27 | 2904 | goto out_free_index; |
21208ae5 | 2905 | } |
f27bac27 | 2906 | |
1da177e4 LT |
2907 | sdkp->device = sdp; |
2908 | sdkp->driver = &sd_template; | |
2909 | sdkp->disk = gd; | |
2910 | sdkp->index = index; | |
409f3499 | 2911 | atomic_set(&sdkp->openers, 0); |
9e1a1537 | 2912 | atomic_set(&sdkp->device->ioerr_cnt, 0); |
1da177e4 | 2913 | |
601e7638 JB |
2914 | if (!sdp->request_queue->rq_timeout) { |
2915 | if (sdp->type != TYPE_MOD) | |
2916 | blk_queue_rq_timeout(sdp->request_queue, SD_TIMEOUT); | |
2917 | else | |
2918 | blk_queue_rq_timeout(sdp->request_queue, | |
2919 | SD_MOD_TIMEOUT); | |
2920 | } | |
2921 | ||
2922 | device_initialize(&sdkp->dev); | |
478a8a05 | 2923 | sdkp->dev.parent = dev; |
601e7638 | 2924 | sdkp->dev.class = &sd_disk_class; |
478a8a05 | 2925 | dev_set_name(&sdkp->dev, dev_name(dev)); |
601e7638 JB |
2926 | |
2927 | if (device_add(&sdkp->dev)) | |
2928 | goto out_free_index; | |
2929 | ||
478a8a05 AS |
2930 | get_device(dev); |
2931 | dev_set_drvdata(dev, sdkp); | |
601e7638 | 2932 | |
ea038f63 | 2933 | get_device(&sdkp->dev); /* prevent release before async_schedule */ |
a7a20d10 | 2934 | async_schedule_domain(sd_probe_async, sdkp, &scsi_sd_probe_domain); |
1da177e4 LT |
2935 | |
2936 | return 0; | |
2937 | ||
f27bac27 | 2938 | out_free_index: |
4034cc68 | 2939 | spin_lock(&sd_index_lock); |
f27bac27 | 2940 | ida_remove(&sd_index_ida, index); |
4034cc68 | 2941 | spin_unlock(&sd_index_lock); |
6bdaa1f1 | 2942 | out_put: |
1da177e4 | 2943 | put_disk(gd); |
6bdaa1f1 | 2944 | out_free: |
1da177e4 | 2945 | kfree(sdkp); |
6bdaa1f1 | 2946 | out: |
1da177e4 LT |
2947 | return error; |
2948 | } | |
2949 | ||
2950 | /** | |
2951 | * sd_remove - called whenever a scsi disk (previously recognized by | |
2952 | * sd_probe) is detached from the system. It is called (potentially | |
2953 | * multiple times) during sd module unload. | |
2954 | * @sdp: pointer to mid level scsi device object | |
2955 | * | |
2956 | * Note: this function is invoked from the scsi mid-level. | |
2957 | * This function potentially frees up a device name (e.g. /dev/sdc) | |
2958 | * that could be re-used by a subsequent sd_probe(). | |
2959 | * This function is not called when the built-in sd driver is "exit-ed". | |
2960 | **/ | |
2961 | static int sd_remove(struct device *dev) | |
2962 | { | |
601e7638 | 2963 | struct scsi_disk *sdkp; |
1da177e4 | 2964 | |
601e7638 | 2965 | sdkp = dev_get_drvdata(dev); |
478a8a05 AS |
2966 | scsi_autopm_get_device(sdkp->device); |
2967 | ||
a7a20d10 | 2968 | async_synchronize_full_domain(&scsi_sd_probe_domain); |
b391277a | 2969 | blk_queue_prep_rq(sdkp->device->request_queue, scsi_prep_fn); |
82b6d57f | 2970 | blk_queue_unprep_rq(sdkp->device->request_queue, NULL); |
ee959b00 | 2971 | device_del(&sdkp->dev); |
1da177e4 LT |
2972 | del_gendisk(sdkp->disk); |
2973 | sd_shutdown(dev); | |
39b7f1e2 | 2974 | |
0b950672 | 2975 | mutex_lock(&sd_ref_mutex); |
39b7f1e2 | 2976 | dev_set_drvdata(dev, NULL); |
ee959b00 | 2977 | put_device(&sdkp->dev); |
0b950672 | 2978 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
2979 | |
2980 | return 0; | |
2981 | } | |
2982 | ||
2983 | /** | |
2984 | * scsi_disk_release - Called to free the scsi_disk structure | |
ee959b00 | 2985 | * @dev: pointer to embedded class device |
1da177e4 | 2986 | * |
0b950672 | 2987 | * sd_ref_mutex must be held entering this routine. Because it is |
1da177e4 LT |
2988 | * called on last put, you should always use the scsi_disk_get() |
2989 | * scsi_disk_put() helpers which manipulate the semaphore directly | |
ee959b00 | 2990 | * and never do a direct put_device. |
1da177e4 | 2991 | **/ |
ee959b00 | 2992 | static void scsi_disk_release(struct device *dev) |
1da177e4 | 2993 | { |
ee959b00 | 2994 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
1da177e4 LT |
2995 | struct gendisk *disk = sdkp->disk; |
2996 | ||
4034cc68 | 2997 | spin_lock(&sd_index_lock); |
f27bac27 | 2998 | ida_remove(&sd_index_ida, sdkp->index); |
4034cc68 | 2999 | spin_unlock(&sd_index_lock); |
1da177e4 LT |
3000 | |
3001 | disk->private_data = NULL; | |
1da177e4 | 3002 | put_disk(disk); |
39b7f1e2 | 3003 | put_device(&sdkp->device->sdev_gendev); |
1da177e4 LT |
3004 | |
3005 | kfree(sdkp); | |
3006 | } | |
3007 | ||
cc5d2c8c | 3008 | static int sd_start_stop_device(struct scsi_disk *sdkp, int start) |
c3c94c5a TH |
3009 | { |
3010 | unsigned char cmd[6] = { START_STOP }; /* START_VALID */ | |
3011 | struct scsi_sense_hdr sshdr; | |
cc5d2c8c | 3012 | struct scsi_device *sdp = sdkp->device; |
c3c94c5a TH |
3013 | int res; |
3014 | ||
3015 | if (start) | |
3016 | cmd[4] |= 1; /* START */ | |
3017 | ||
d2886ea3 SR |
3018 | if (sdp->start_stop_pwr_cond) |
3019 | cmd[4] |= start ? 1 << 4 : 3 << 4; /* Active or Standby */ | |
3020 | ||
c3c94c5a TH |
3021 | if (!scsi_device_online(sdp)) |
3022 | return -ENODEV; | |
3023 | ||
3024 | res = scsi_execute_req(sdp, cmd, DMA_NONE, NULL, 0, &sshdr, | |
f4f4e47e | 3025 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); |
c3c94c5a | 3026 | if (res) { |
cc5d2c8c JB |
3027 | sd_printk(KERN_WARNING, sdkp, "START_STOP FAILED\n"); |
3028 | sd_print_result(sdkp, res); | |
c3c94c5a | 3029 | if (driver_byte(res) & DRIVER_SENSE) |
cc5d2c8c | 3030 | sd_print_sense_hdr(sdkp, &sshdr); |
c3c94c5a TH |
3031 | } |
3032 | ||
3033 | return res; | |
3034 | } | |
3035 | ||
1da177e4 LT |
3036 | /* |
3037 | * Send a SYNCHRONIZE CACHE instruction down to the device through | |
3038 | * the normal SCSI command structure. Wait for the command to | |
3039 | * complete. | |
3040 | */ | |
3041 | static void sd_shutdown(struct device *dev) | |
3042 | { | |
39b7f1e2 | 3043 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
1da177e4 LT |
3044 | |
3045 | if (!sdkp) | |
3046 | return; /* this can happen */ | |
3047 | ||
54f57588 LM |
3048 | if (pm_runtime_suspended(dev)) |
3049 | goto exit; | |
3050 | ||
39b7f1e2 | 3051 | if (sdkp->WCE) { |
e73aec82 MP |
3052 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
3053 | sd_sync_cache(sdkp); | |
39b7f1e2 | 3054 | } |
c3c94c5a | 3055 | |
cc5d2c8c JB |
3056 | if (system_state != SYSTEM_RESTART && sdkp->device->manage_start_stop) { |
3057 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); | |
3058 | sd_start_stop_device(sdkp, 0); | |
c3c94c5a TH |
3059 | } |
3060 | ||
54f57588 | 3061 | exit: |
39b7f1e2 AS |
3062 | scsi_disk_put(sdkp); |
3063 | } | |
1da177e4 | 3064 | |
691e3d31 | 3065 | static int sd_suspend(struct device *dev) |
c3c94c5a | 3066 | { |
c3c94c5a | 3067 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
09ff92fe | 3068 | int ret = 0; |
c3c94c5a TH |
3069 | |
3070 | if (!sdkp) | |
3071 | return 0; /* this can happen */ | |
3072 | ||
3073 | if (sdkp->WCE) { | |
cc5d2c8c | 3074 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
c3c94c5a TH |
3075 | ret = sd_sync_cache(sdkp); |
3076 | if (ret) | |
09ff92fe | 3077 | goto done; |
c3c94c5a TH |
3078 | } |
3079 | ||
691e3d31 | 3080 | if (sdkp->device->manage_start_stop) { |
cc5d2c8c JB |
3081 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); |
3082 | ret = sd_start_stop_device(sdkp, 0); | |
c3c94c5a TH |
3083 | } |
3084 | ||
09ff92fe AS |
3085 | done: |
3086 | scsi_disk_put(sdkp); | |
3087 | return ret; | |
c3c94c5a TH |
3088 | } |
3089 | ||
3090 | static int sd_resume(struct device *dev) | |
3091 | { | |
c3c94c5a | 3092 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
09ff92fe | 3093 | int ret = 0; |
c3c94c5a | 3094 | |
cc5d2c8c | 3095 | if (!sdkp->device->manage_start_stop) |
09ff92fe | 3096 | goto done; |
c3c94c5a | 3097 | |
cc5d2c8c | 3098 | sd_printk(KERN_NOTICE, sdkp, "Starting disk\n"); |
09ff92fe | 3099 | ret = sd_start_stop_device(sdkp, 1); |
c3c94c5a | 3100 | |
09ff92fe AS |
3101 | done: |
3102 | scsi_disk_put(sdkp); | |
3103 | return ret; | |
c3c94c5a TH |
3104 | } |
3105 | ||
1da177e4 LT |
3106 | /** |
3107 | * init_sd - entry point for this driver (both when built in or when | |
3108 | * a module). | |
3109 | * | |
3110 | * Note: this function registers this driver with the scsi mid-level. | |
3111 | **/ | |
3112 | static int __init init_sd(void) | |
3113 | { | |
5e4009ba | 3114 | int majors = 0, i, err; |
1da177e4 LT |
3115 | |
3116 | SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n")); | |
3117 | ||
3118 | for (i = 0; i < SD_MAJORS; i++) | |
3119 | if (register_blkdev(sd_major(i), "sd") == 0) | |
3120 | majors++; | |
3121 | ||
3122 | if (!majors) | |
3123 | return -ENODEV; | |
3124 | ||
5e4009ba JG |
3125 | err = class_register(&sd_disk_class); |
3126 | if (err) | |
3127 | goto err_out; | |
6bdaa1f1 | 3128 | |
4e7392ec MP |
3129 | sd_cdb_cache = kmem_cache_create("sd_ext_cdb", SD_EXT_CDB_SIZE, |
3130 | 0, 0, NULL); | |
3131 | if (!sd_cdb_cache) { | |
3132 | printk(KERN_ERR "sd: can't init extended cdb cache\n"); | |
3133 | goto err_out_class; | |
3134 | } | |
3135 | ||
3136 | sd_cdb_pool = mempool_create_slab_pool(SD_MEMPOOL_SIZE, sd_cdb_cache); | |
3137 | if (!sd_cdb_pool) { | |
3138 | printk(KERN_ERR "sd: can't init extended cdb pool\n"); | |
3139 | goto err_out_cache; | |
3140 | } | |
3141 | ||
afd5e34b JD |
3142 | err = scsi_register_driver(&sd_template.gendrv); |
3143 | if (err) | |
3144 | goto err_out_driver; | |
3145 | ||
5e4009ba JG |
3146 | return 0; |
3147 | ||
afd5e34b JD |
3148 | err_out_driver: |
3149 | mempool_destroy(sd_cdb_pool); | |
3150 | ||
4e7392ec MP |
3151 | err_out_cache: |
3152 | kmem_cache_destroy(sd_cdb_cache); | |
3153 | ||
5e4009ba JG |
3154 | err_out_class: |
3155 | class_unregister(&sd_disk_class); | |
3156 | err_out: | |
3157 | for (i = 0; i < SD_MAJORS; i++) | |
3158 | unregister_blkdev(sd_major(i), "sd"); | |
3159 | return err; | |
1da177e4 LT |
3160 | } |
3161 | ||
3162 | /** | |
3163 | * exit_sd - exit point for this driver (when it is a module). | |
3164 | * | |
3165 | * Note: this function unregisters this driver from the scsi mid-level. | |
3166 | **/ | |
3167 | static void __exit exit_sd(void) | |
3168 | { | |
3169 | int i; | |
3170 | ||
3171 | SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n")); | |
3172 | ||
afd5e34b | 3173 | scsi_unregister_driver(&sd_template.gendrv); |
4e7392ec MP |
3174 | mempool_destroy(sd_cdb_pool); |
3175 | kmem_cache_destroy(sd_cdb_cache); | |
3176 | ||
5e4009ba JG |
3177 | class_unregister(&sd_disk_class); |
3178 | ||
1da177e4 LT |
3179 | for (i = 0; i < SD_MAJORS; i++) |
3180 | unregister_blkdev(sd_major(i), "sd"); | |
3181 | } | |
3182 | ||
1da177e4 LT |
3183 | module_init(init_sd); |
3184 | module_exit(exit_sd); | |
e73aec82 MP |
3185 | |
3186 | static void sd_print_sense_hdr(struct scsi_disk *sdkp, | |
3187 | struct scsi_sense_hdr *sshdr) | |
3188 | { | |
2e4c3329 | 3189 | sd_printk(KERN_INFO, sdkp, " "); |
e73aec82 | 3190 | scsi_show_sense_hdr(sshdr); |
2e4c3329 | 3191 | sd_printk(KERN_INFO, sdkp, " "); |
e73aec82 MP |
3192 | scsi_show_extd_sense(sshdr->asc, sshdr->ascq); |
3193 | } | |
3194 | ||
3195 | static void sd_print_result(struct scsi_disk *sdkp, int result) | |
3196 | { | |
2e4c3329 | 3197 | sd_printk(KERN_INFO, sdkp, " "); |
e73aec82 MP |
3198 | scsi_show_result(result); |
3199 | } | |
3200 |