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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 | 134 | static ssize_t |
e1ea2351 GKH |
135 | cache_type_store(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; | |
2ee3e26c | 145 | static const char temp[] = "temporary "; |
6bdaa1f1 JB |
146 | int len; |
147 | ||
148 | if (sdp->type != TYPE_DISK) | |
149 | /* no cache control on RBC devices; theoretically they | |
150 | * can do it, but there's probably so many exceptions | |
151 | * it's not worth the risk */ | |
152 | return -EINVAL; | |
153 | ||
39c60a09 JB |
154 | if (strncmp(buf, temp, sizeof(temp) - 1) == 0) { |
155 | buf += sizeof(temp) - 1; | |
156 | sdkp->cache_override = 1; | |
157 | } else { | |
158 | sdkp->cache_override = 0; | |
159 | } | |
160 | ||
6391a113 | 161 | for (i = 0; i < ARRAY_SIZE(sd_cache_types); i++) { |
439d77f7 | 162 | len = strlen(sd_cache_types[i]); |
6bdaa1f1 JB |
163 | if (strncmp(sd_cache_types[i], buf, len) == 0 && |
164 | buf[len] == '\n') { | |
165 | ct = i; | |
166 | break; | |
167 | } | |
168 | } | |
169 | if (ct < 0) | |
170 | return -EINVAL; | |
171 | rcd = ct & 0x01 ? 1 : 0; | |
172 | wce = ct & 0x02 ? 1 : 0; | |
39c60a09 JB |
173 | |
174 | if (sdkp->cache_override) { | |
175 | sdkp->WCE = wce; | |
176 | sdkp->RCD = rcd; | |
177 | return count; | |
178 | } | |
179 | ||
6bdaa1f1 JB |
180 | if (scsi_mode_sense(sdp, 0x08, 8, buffer, sizeof(buffer), SD_TIMEOUT, |
181 | SD_MAX_RETRIES, &data, NULL)) | |
182 | return -EINVAL; | |
a9312fb8 | 183 | len = min_t(size_t, sizeof(buffer), data.length - data.header_length - |
6bdaa1f1 JB |
184 | data.block_descriptor_length); |
185 | buffer_data = buffer + data.header_length + | |
186 | data.block_descriptor_length; | |
187 | buffer_data[2] &= ~0x05; | |
188 | buffer_data[2] |= wce << 2 | rcd; | |
189 | sp = buffer_data[0] & 0x80 ? 1 : 0; | |
190 | ||
191 | if (scsi_mode_select(sdp, 1, sp, 8, buffer_data, len, SD_TIMEOUT, | |
192 | SD_MAX_RETRIES, &data, &sshdr)) { | |
193 | if (scsi_sense_valid(&sshdr)) | |
e73aec82 | 194 | sd_print_sense_hdr(sdkp, &sshdr); |
6bdaa1f1 JB |
195 | return -EINVAL; |
196 | } | |
f98a8cae | 197 | revalidate_disk(sdkp->disk); |
6bdaa1f1 JB |
198 | return count; |
199 | } | |
200 | ||
ee959b00 | 201 | static ssize_t |
e1ea2351 GKH |
202 | manage_start_stop_show(struct device *dev, struct device_attribute *attr, |
203 | char *buf) | |
204 | { | |
205 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
206 | struct scsi_device *sdp = sdkp->device; | |
207 | ||
208 | return snprintf(buf, 20, "%u\n", sdp->manage_start_stop); | |
209 | } | |
210 | ||
211 | static ssize_t | |
212 | manage_start_stop_store(struct device *dev, struct device_attribute *attr, | |
213 | const char *buf, size_t count) | |
c3c94c5a | 214 | { |
ee959b00 | 215 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
c3c94c5a TH |
216 | struct scsi_device *sdp = sdkp->device; |
217 | ||
218 | if (!capable(CAP_SYS_ADMIN)) | |
219 | return -EACCES; | |
220 | ||
221 | sdp->manage_start_stop = simple_strtoul(buf, NULL, 10); | |
222 | ||
223 | return count; | |
224 | } | |
e1ea2351 | 225 | static DEVICE_ATTR_RW(manage_start_stop); |
c3c94c5a | 226 | |
ee959b00 | 227 | static ssize_t |
e1ea2351 GKH |
228 | allow_restart_show(struct device *dev, struct device_attribute *attr, char *buf) |
229 | { | |
230 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
231 | ||
232 | return snprintf(buf, 40, "%d\n", sdkp->device->allow_restart); | |
233 | } | |
234 | ||
235 | static ssize_t | |
236 | allow_restart_store(struct device *dev, struct device_attribute *attr, | |
237 | const char *buf, size_t count) | |
a144c5ae | 238 | { |
ee959b00 | 239 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
a144c5ae BK |
240 | struct scsi_device *sdp = sdkp->device; |
241 | ||
242 | if (!capable(CAP_SYS_ADMIN)) | |
243 | return -EACCES; | |
244 | ||
245 | if (sdp->type != TYPE_DISK) | |
246 | return -EINVAL; | |
247 | ||
248 | sdp->allow_restart = simple_strtoul(buf, NULL, 10); | |
249 | ||
250 | return count; | |
251 | } | |
e1ea2351 | 252 | static DEVICE_ATTR_RW(allow_restart); |
a144c5ae | 253 | |
ee959b00 | 254 | static ssize_t |
e1ea2351 | 255 | cache_type_show(struct device *dev, struct device_attribute *attr, char *buf) |
6bdaa1f1 | 256 | { |
ee959b00 | 257 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
258 | int ct = sdkp->RCD + 2*sdkp->WCE; |
259 | ||
260 | return snprintf(buf, 40, "%s\n", sd_cache_types[ct]); | |
261 | } | |
e1ea2351 | 262 | static DEVICE_ATTR_RW(cache_type); |
6bdaa1f1 | 263 | |
ee959b00 | 264 | static ssize_t |
e1ea2351 | 265 | FUA_show(struct device *dev, struct device_attribute *attr, char *buf) |
6bdaa1f1 | 266 | { |
ee959b00 | 267 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
268 | |
269 | return snprintf(buf, 20, "%u\n", sdkp->DPOFUA); | |
270 | } | |
e1ea2351 | 271 | static DEVICE_ATTR_RO(FUA); |
6bdaa1f1 | 272 | |
ee959b00 | 273 | static ssize_t |
e1ea2351 GKH |
274 | protection_type_show(struct device *dev, struct device_attribute *attr, |
275 | char *buf) | |
e0597d70 MP |
276 | { |
277 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
278 | ||
279 | return snprintf(buf, 20, "%u\n", sdkp->protection_type); | |
280 | } | |
281 | ||
8172499a | 282 | static ssize_t |
e1ea2351 GKH |
283 | protection_type_store(struct device *dev, struct device_attribute *attr, |
284 | const char *buf, size_t count) | |
8172499a MP |
285 | { |
286 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
287 | unsigned int val; | |
288 | int err; | |
289 | ||
290 | if (!capable(CAP_SYS_ADMIN)) | |
291 | return -EACCES; | |
292 | ||
293 | err = kstrtouint(buf, 10, &val); | |
294 | ||
295 | if (err) | |
296 | return err; | |
297 | ||
298 | if (val >= 0 && val <= SD_DIF_TYPE3_PROTECTION) | |
299 | sdkp->protection_type = val; | |
300 | ||
301 | return count; | |
302 | } | |
e1ea2351 | 303 | static DEVICE_ATTR_RW(protection_type); |
8172499a | 304 | |
518fa8e3 | 305 | static ssize_t |
e1ea2351 GKH |
306 | protection_mode_show(struct device *dev, struct device_attribute *attr, |
307 | char *buf) | |
518fa8e3 MP |
308 | { |
309 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
310 | struct scsi_device *sdp = sdkp->device; | |
311 | unsigned int dif, dix; | |
312 | ||
313 | dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type); | |
314 | dix = scsi_host_dix_capable(sdp->host, sdkp->protection_type); | |
315 | ||
316 | if (!dix && scsi_host_dix_capable(sdp->host, SD_DIF_TYPE0_PROTECTION)) { | |
317 | dif = 0; | |
318 | dix = 1; | |
319 | } | |
320 | ||
321 | if (!dif && !dix) | |
322 | return snprintf(buf, 20, "none\n"); | |
323 | ||
324 | return snprintf(buf, 20, "%s%u\n", dix ? "dix" : "dif", dif); | |
325 | } | |
e1ea2351 | 326 | static DEVICE_ATTR_RO(protection_mode); |
518fa8e3 | 327 | |
e0597d70 | 328 | static ssize_t |
e1ea2351 | 329 | app_tag_own_show(struct device *dev, struct device_attribute *attr, char *buf) |
e0597d70 MP |
330 | { |
331 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
332 | ||
333 | return snprintf(buf, 20, "%u\n", sdkp->ATO); | |
334 | } | |
e1ea2351 | 335 | static DEVICE_ATTR_RO(app_tag_own); |
e0597d70 | 336 | |
e339c1a7 | 337 | static ssize_t |
e1ea2351 GKH |
338 | thin_provisioning_show(struct device *dev, struct device_attribute *attr, |
339 | char *buf) | |
e339c1a7 MP |
340 | { |
341 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
342 | ||
c98a0eb0 MP |
343 | return snprintf(buf, 20, "%u\n", sdkp->lbpme); |
344 | } | |
e1ea2351 | 345 | static DEVICE_ATTR_RO(thin_provisioning); |
c98a0eb0 MP |
346 | |
347 | static const char *lbp_mode[] = { | |
348 | [SD_LBP_FULL] = "full", | |
349 | [SD_LBP_UNMAP] = "unmap", | |
350 | [SD_LBP_WS16] = "writesame_16", | |
351 | [SD_LBP_WS10] = "writesame_10", | |
352 | [SD_LBP_ZERO] = "writesame_zero", | |
353 | [SD_LBP_DISABLE] = "disabled", | |
354 | }; | |
355 | ||
356 | static ssize_t | |
e1ea2351 GKH |
357 | provisioning_mode_show(struct device *dev, struct device_attribute *attr, |
358 | char *buf) | |
c98a0eb0 MP |
359 | { |
360 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
361 | ||
362 | return snprintf(buf, 20, "%s\n", lbp_mode[sdkp->provisioning_mode]); | |
363 | } | |
364 | ||
365 | static ssize_t | |
e1ea2351 GKH |
366 | provisioning_mode_store(struct device *dev, struct device_attribute *attr, |
367 | const char *buf, size_t count) | |
c98a0eb0 MP |
368 | { |
369 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
370 | struct scsi_device *sdp = sdkp->device; | |
371 | ||
372 | if (!capable(CAP_SYS_ADMIN)) | |
373 | return -EACCES; | |
374 | ||
375 | if (sdp->type != TYPE_DISK) | |
376 | return -EINVAL; | |
377 | ||
378 | if (!strncmp(buf, lbp_mode[SD_LBP_UNMAP], 20)) | |
379 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
380 | else if (!strncmp(buf, lbp_mode[SD_LBP_WS16], 20)) | |
381 | sd_config_discard(sdkp, SD_LBP_WS16); | |
382 | else if (!strncmp(buf, lbp_mode[SD_LBP_WS10], 20)) | |
383 | sd_config_discard(sdkp, SD_LBP_WS10); | |
384 | else if (!strncmp(buf, lbp_mode[SD_LBP_ZERO], 20)) | |
385 | sd_config_discard(sdkp, SD_LBP_ZERO); | |
386 | else if (!strncmp(buf, lbp_mode[SD_LBP_DISABLE], 20)) | |
387 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
388 | else | |
389 | return -EINVAL; | |
390 | ||
391 | return count; | |
e339c1a7 | 392 | } |
e1ea2351 | 393 | static DEVICE_ATTR_RW(provisioning_mode); |
e339c1a7 | 394 | |
18a4d0a2 | 395 | static ssize_t |
e1ea2351 GKH |
396 | max_medium_access_timeouts_show(struct device *dev, |
397 | struct device_attribute *attr, char *buf) | |
18a4d0a2 MP |
398 | { |
399 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
400 | ||
401 | return snprintf(buf, 20, "%u\n", sdkp->max_medium_access_timeouts); | |
402 | } | |
403 | ||
404 | static ssize_t | |
e1ea2351 GKH |
405 | max_medium_access_timeouts_store(struct device *dev, |
406 | struct device_attribute *attr, const char *buf, | |
407 | size_t count) | |
18a4d0a2 MP |
408 | { |
409 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
410 | int err; | |
411 | ||
412 | if (!capable(CAP_SYS_ADMIN)) | |
413 | return -EACCES; | |
414 | ||
415 | err = kstrtouint(buf, 10, &sdkp->max_medium_access_timeouts); | |
416 | ||
417 | return err ? err : count; | |
418 | } | |
e1ea2351 | 419 | static DEVICE_ATTR_RW(max_medium_access_timeouts); |
18a4d0a2 | 420 | |
5db44863 | 421 | static ssize_t |
e1ea2351 GKH |
422 | max_write_same_blocks_show(struct device *dev, struct device_attribute *attr, |
423 | char *buf) | |
5db44863 MP |
424 | { |
425 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
426 | ||
427 | return snprintf(buf, 20, "%u\n", sdkp->max_ws_blocks); | |
428 | } | |
429 | ||
430 | static ssize_t | |
e1ea2351 GKH |
431 | max_write_same_blocks_store(struct device *dev, struct device_attribute *attr, |
432 | const char *buf, size_t count) | |
5db44863 MP |
433 | { |
434 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
435 | struct scsi_device *sdp = sdkp->device; | |
436 | unsigned long max; | |
437 | int err; | |
438 | ||
439 | if (!capable(CAP_SYS_ADMIN)) | |
440 | return -EACCES; | |
441 | ||
442 | if (sdp->type != TYPE_DISK) | |
443 | return -EINVAL; | |
444 | ||
445 | err = kstrtoul(buf, 10, &max); | |
446 | ||
447 | if (err) | |
448 | return err; | |
449 | ||
450 | if (max == 0) | |
451 | sdp->no_write_same = 1; | |
66c28f97 MP |
452 | else if (max <= SD_MAX_WS16_BLOCKS) { |
453 | sdp->no_write_same = 0; | |
5db44863 | 454 | sdkp->max_ws_blocks = max; |
66c28f97 | 455 | } |
5db44863 MP |
456 | |
457 | sd_config_write_same(sdkp); | |
458 | ||
459 | return count; | |
460 | } | |
e1ea2351 GKH |
461 | static DEVICE_ATTR_RW(max_write_same_blocks); |
462 | ||
463 | static struct attribute *sd_disk_attrs[] = { | |
464 | &dev_attr_cache_type.attr, | |
465 | &dev_attr_FUA.attr, | |
466 | &dev_attr_allow_restart.attr, | |
467 | &dev_attr_manage_start_stop.attr, | |
468 | &dev_attr_protection_type.attr, | |
469 | &dev_attr_protection_mode.attr, | |
470 | &dev_attr_app_tag_own.attr, | |
471 | &dev_attr_thin_provisioning.attr, | |
472 | &dev_attr_provisioning_mode.attr, | |
473 | &dev_attr_max_write_same_blocks.attr, | |
474 | &dev_attr_max_medium_access_timeouts.attr, | |
475 | NULL, | |
6bdaa1f1 | 476 | }; |
e1ea2351 | 477 | ATTRIBUTE_GROUPS(sd_disk); |
6bdaa1f1 JB |
478 | |
479 | static struct class sd_disk_class = { | |
480 | .name = "scsi_disk", | |
481 | .owner = THIS_MODULE, | |
ee959b00 | 482 | .dev_release = scsi_disk_release, |
e1ea2351 | 483 | .dev_groups = sd_disk_groups, |
6bdaa1f1 | 484 | }; |
1da177e4 | 485 | |
691e3d31 AL |
486 | static const struct dev_pm_ops sd_pm_ops = { |
487 | .suspend = sd_suspend, | |
488 | .resume = sd_resume, | |
489 | .poweroff = sd_suspend, | |
490 | .restore = sd_resume, | |
491 | .runtime_suspend = sd_suspend, | |
492 | .runtime_resume = sd_resume, | |
493 | }; | |
494 | ||
1da177e4 LT |
495 | static struct scsi_driver sd_template = { |
496 | .owner = THIS_MODULE, | |
497 | .gendrv = { | |
498 | .name = "sd", | |
499 | .probe = sd_probe, | |
500 | .remove = sd_remove, | |
501 | .shutdown = sd_shutdown, | |
691e3d31 | 502 | .pm = &sd_pm_ops, |
1da177e4 LT |
503 | }, |
504 | .rescan = sd_rescan, | |
7b3d9545 | 505 | .done = sd_done, |
18a4d0a2 | 506 | .eh_action = sd_eh_action, |
1da177e4 LT |
507 | }; |
508 | ||
0761df9c HR |
509 | /* |
510 | * Dummy kobj_map->probe function. | |
511 | * The default ->probe function will call modprobe, which is | |
512 | * pointless as this module is already loaded. | |
513 | */ | |
514 | static struct kobject *sd_default_probe(dev_t devt, int *partno, void *data) | |
515 | { | |
516 | return NULL; | |
517 | } | |
518 | ||
1da177e4 LT |
519 | /* |
520 | * Device no to disk mapping: | |
521 | * | |
522 | * major disc2 disc p1 | |
523 | * |............|.............|....|....| <- dev_t | |
524 | * 31 20 19 8 7 4 3 0 | |
525 | * | |
526 | * Inside a major, we have 16k disks, however mapped non- | |
527 | * contiguously. The first 16 disks are for major0, the next | |
528 | * ones with major1, ... Disk 256 is for major0 again, disk 272 | |
529 | * for major1, ... | |
530 | * As we stay compatible with our numbering scheme, we can reuse | |
531 | * the well-know SCSI majors 8, 65--71, 136--143. | |
532 | */ | |
533 | static int sd_major(int major_idx) | |
534 | { | |
535 | switch (major_idx) { | |
536 | case 0: | |
537 | return SCSI_DISK0_MAJOR; | |
538 | case 1 ... 7: | |
539 | return SCSI_DISK1_MAJOR + major_idx - 1; | |
540 | case 8 ... 15: | |
541 | return SCSI_DISK8_MAJOR + major_idx - 8; | |
542 | default: | |
543 | BUG(); | |
544 | return 0; /* shut up gcc */ | |
545 | } | |
546 | } | |
547 | ||
39b7f1e2 | 548 | static struct scsi_disk *__scsi_disk_get(struct gendisk *disk) |
1da177e4 LT |
549 | { |
550 | struct scsi_disk *sdkp = NULL; | |
551 | ||
39b7f1e2 AS |
552 | if (disk->private_data) { |
553 | sdkp = scsi_disk(disk); | |
554 | if (scsi_device_get(sdkp->device) == 0) | |
ee959b00 | 555 | get_device(&sdkp->dev); |
39b7f1e2 AS |
556 | else |
557 | sdkp = NULL; | |
558 | } | |
559 | return sdkp; | |
560 | } | |
561 | ||
562 | static struct scsi_disk *scsi_disk_get(struct gendisk *disk) | |
563 | { | |
564 | struct scsi_disk *sdkp; | |
565 | ||
0b950672 | 566 | mutex_lock(&sd_ref_mutex); |
39b7f1e2 | 567 | sdkp = __scsi_disk_get(disk); |
0b950672 | 568 | mutex_unlock(&sd_ref_mutex); |
1da177e4 | 569 | return sdkp; |
39b7f1e2 | 570 | } |
1da177e4 | 571 | |
39b7f1e2 AS |
572 | static struct scsi_disk *scsi_disk_get_from_dev(struct device *dev) |
573 | { | |
574 | struct scsi_disk *sdkp; | |
575 | ||
0b950672 | 576 | mutex_lock(&sd_ref_mutex); |
39b7f1e2 AS |
577 | sdkp = dev_get_drvdata(dev); |
578 | if (sdkp) | |
579 | sdkp = __scsi_disk_get(sdkp->disk); | |
0b950672 | 580 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
581 | return sdkp; |
582 | } | |
583 | ||
584 | static void scsi_disk_put(struct scsi_disk *sdkp) | |
585 | { | |
586 | struct scsi_device *sdev = sdkp->device; | |
587 | ||
0b950672 | 588 | mutex_lock(&sd_ref_mutex); |
ee959b00 | 589 | put_device(&sdkp->dev); |
1da177e4 | 590 | scsi_device_put(sdev); |
0b950672 | 591 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
592 | } |
593 | ||
35e1a5d9 MP |
594 | static void sd_prot_op(struct scsi_cmnd *scmd, unsigned int dif) |
595 | { | |
596 | unsigned int prot_op = SCSI_PROT_NORMAL; | |
597 | unsigned int dix = scsi_prot_sg_count(scmd); | |
598 | ||
599 | if (scmd->sc_data_direction == DMA_FROM_DEVICE) { | |
600 | if (dif && dix) | |
601 | prot_op = SCSI_PROT_READ_PASS; | |
602 | else if (dif && !dix) | |
603 | prot_op = SCSI_PROT_READ_STRIP; | |
604 | else if (!dif && dix) | |
605 | prot_op = SCSI_PROT_READ_INSERT; | |
606 | } else { | |
607 | if (dif && dix) | |
608 | prot_op = SCSI_PROT_WRITE_PASS; | |
609 | else if (dif && !dix) | |
610 | prot_op = SCSI_PROT_WRITE_INSERT; | |
611 | else if (!dif && dix) | |
612 | prot_op = SCSI_PROT_WRITE_STRIP; | |
613 | } | |
614 | ||
615 | scsi_set_prot_op(scmd, prot_op); | |
616 | scsi_set_prot_type(scmd, dif); | |
617 | } | |
618 | ||
c98a0eb0 MP |
619 | static void sd_config_discard(struct scsi_disk *sdkp, unsigned int mode) |
620 | { | |
621 | struct request_queue *q = sdkp->disk->queue; | |
622 | unsigned int logical_block_size = sdkp->device->sector_size; | |
623 | unsigned int max_blocks = 0; | |
624 | ||
625 | q->limits.discard_zeroes_data = sdkp->lbprz; | |
2a8cfad0 MP |
626 | q->limits.discard_alignment = sdkp->unmap_alignment * |
627 | logical_block_size; | |
c98a0eb0 MP |
628 | q->limits.discard_granularity = |
629 | max(sdkp->physical_block_size, | |
630 | sdkp->unmap_granularity * logical_block_size); | |
631 | ||
89730393 MP |
632 | sdkp->provisioning_mode = mode; |
633 | ||
c98a0eb0 MP |
634 | switch (mode) { |
635 | ||
636 | case SD_LBP_DISABLE: | |
637 | q->limits.max_discard_sectors = 0; | |
638 | queue_flag_clear_unlocked(QUEUE_FLAG_DISCARD, q); | |
639 | return; | |
640 | ||
641 | case SD_LBP_UNMAP: | |
5db44863 MP |
642 | max_blocks = min_not_zero(sdkp->max_unmap_blocks, |
643 | (u32)SD_MAX_WS16_BLOCKS); | |
c98a0eb0 MP |
644 | break; |
645 | ||
646 | case SD_LBP_WS16: | |
5db44863 MP |
647 | max_blocks = min_not_zero(sdkp->max_ws_blocks, |
648 | (u32)SD_MAX_WS16_BLOCKS); | |
c98a0eb0 MP |
649 | break; |
650 | ||
651 | case SD_LBP_WS10: | |
5db44863 MP |
652 | max_blocks = min_not_zero(sdkp->max_ws_blocks, |
653 | (u32)SD_MAX_WS10_BLOCKS); | |
c98a0eb0 MP |
654 | break; |
655 | ||
656 | case SD_LBP_ZERO: | |
5db44863 MP |
657 | max_blocks = min_not_zero(sdkp->max_ws_blocks, |
658 | (u32)SD_MAX_WS10_BLOCKS); | |
c98a0eb0 MP |
659 | q->limits.discard_zeroes_data = 1; |
660 | break; | |
661 | } | |
662 | ||
663 | q->limits.max_discard_sectors = max_blocks * (logical_block_size >> 9); | |
664 | queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, q); | |
c98a0eb0 MP |
665 | } |
666 | ||
e339c1a7 | 667 | /** |
26e85fcd | 668 | * sd_setup_discard_cmnd - unmap blocks on thinly provisioned device |
66ac0280 | 669 | * @sdp: scsi device to operate one |
e339c1a7 MP |
670 | * @rq: Request to prepare |
671 | * | |
672 | * Will issue either UNMAP or WRITE SAME(16) depending on preference | |
673 | * indicated by target device. | |
674 | **/ | |
26e85fcd | 675 | static int sd_setup_discard_cmnd(struct scsi_device *sdp, struct request *rq) |
e339c1a7 MP |
676 | { |
677 | struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); | |
26e85fcd MP |
678 | sector_t sector = blk_rq_pos(rq); |
679 | unsigned int nr_sectors = blk_rq_sectors(rq); | |
680 | unsigned int nr_bytes = blk_rq_bytes(rq); | |
66ac0280 | 681 | unsigned int len; |
f1126e95 | 682 | int ret; |
c98a0eb0 | 683 | char *buf; |
66ac0280 | 684 | struct page *page; |
e339c1a7 | 685 | |
26e85fcd MP |
686 | sector >>= ilog2(sdp->sector_size) - 9; |
687 | nr_sectors >>= ilog2(sdp->sector_size) - 9; | |
e339c1a7 MP |
688 | rq->timeout = SD_TIMEOUT; |
689 | ||
690 | memset(rq->cmd, 0, rq->cmd_len); | |
691 | ||
66ac0280 CH |
692 | page = alloc_page(GFP_ATOMIC | __GFP_ZERO); |
693 | if (!page) | |
694 | return BLKPREP_DEFER; | |
695 | ||
c98a0eb0 MP |
696 | switch (sdkp->provisioning_mode) { |
697 | case SD_LBP_UNMAP: | |
698 | buf = page_address(page); | |
e339c1a7 | 699 | |
66ac0280 | 700 | rq->cmd_len = 10; |
e339c1a7 MP |
701 | rq->cmd[0] = UNMAP; |
702 | rq->cmd[8] = 24; | |
e339c1a7 MP |
703 | |
704 | put_unaligned_be16(6 + 16, &buf[0]); | |
705 | put_unaligned_be16(16, &buf[2]); | |
706 | put_unaligned_be64(sector, &buf[8]); | |
66ac0280 | 707 | put_unaligned_be32(nr_sectors, &buf[16]); |
e339c1a7 | 708 | |
66ac0280 | 709 | len = 24; |
c98a0eb0 MP |
710 | break; |
711 | ||
712 | case SD_LBP_WS16: | |
66ac0280 | 713 | rq->cmd_len = 16; |
e339c1a7 MP |
714 | rq->cmd[0] = WRITE_SAME_16; |
715 | rq->cmd[1] = 0x8; /* UNMAP */ | |
716 | put_unaligned_be64(sector, &rq->cmd[2]); | |
66ac0280 CH |
717 | put_unaligned_be32(nr_sectors, &rq->cmd[10]); |
718 | ||
719 | len = sdkp->device->sector_size; | |
c98a0eb0 MP |
720 | break; |
721 | ||
722 | case SD_LBP_WS10: | |
723 | case SD_LBP_ZERO: | |
724 | rq->cmd_len = 10; | |
725 | rq->cmd[0] = WRITE_SAME; | |
726 | if (sdkp->provisioning_mode == SD_LBP_WS10) | |
727 | rq->cmd[1] = 0x8; /* UNMAP */ | |
728 | put_unaligned_be32(sector, &rq->cmd[2]); | |
729 | put_unaligned_be16(nr_sectors, &rq->cmd[7]); | |
730 | ||
731 | len = sdkp->device->sector_size; | |
732 | break; | |
733 | ||
734 | default: | |
09b9cc44 | 735 | ret = BLKPREP_KILL; |
c98a0eb0 | 736 | goto out; |
e339c1a7 MP |
737 | } |
738 | ||
66ac0280 | 739 | blk_add_request_payload(rq, page, len); |
f1126e95 FT |
740 | ret = scsi_setup_blk_pc_cmnd(sdp, rq); |
741 | rq->buffer = page_address(page); | |
26e85fcd | 742 | rq->__data_len = nr_bytes; |
c98a0eb0 MP |
743 | |
744 | out: | |
610a6349 FT |
745 | if (ret != BLKPREP_OK) { |
746 | __free_page(page); | |
747 | rq->buffer = NULL; | |
748 | } | |
f1126e95 FT |
749 | return ret; |
750 | } | |
751 | ||
5db44863 MP |
752 | static void sd_config_write_same(struct scsi_disk *sdkp) |
753 | { | |
754 | struct request_queue *q = sdkp->disk->queue; | |
755 | unsigned int logical_block_size = sdkp->device->sector_size; | |
5db44863 MP |
756 | |
757 | if (sdkp->device->no_write_same) { | |
758 | sdkp->max_ws_blocks = 0; | |
759 | goto out; | |
760 | } | |
761 | ||
762 | /* Some devices can not handle block counts above 0xffff despite | |
763 | * supporting WRITE SAME(16). Consequently we default to 64k | |
764 | * blocks per I/O unless the device explicitly advertises a | |
765 | * bigger limit. | |
766 | */ | |
66c28f97 MP |
767 | if (sdkp->max_ws_blocks > SD_MAX_WS10_BLOCKS) |
768 | sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks, | |
769 | (u32)SD_MAX_WS16_BLOCKS); | |
770 | else if (sdkp->ws16 || sdkp->ws10 || sdkp->device->no_report_opcodes) | |
771 | sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks, | |
772 | (u32)SD_MAX_WS10_BLOCKS); | |
773 | else { | |
774 | sdkp->device->no_write_same = 1; | |
775 | sdkp->max_ws_blocks = 0; | |
776 | } | |
5db44863 MP |
777 | |
778 | out: | |
66c28f97 MP |
779 | blk_queue_max_write_same_sectors(q, sdkp->max_ws_blocks * |
780 | (logical_block_size >> 9)); | |
5db44863 MP |
781 | } |
782 | ||
783 | /** | |
784 | * sd_setup_write_same_cmnd - write the same data to multiple blocks | |
785 | * @sdp: scsi device to operate one | |
786 | * @rq: Request to prepare | |
787 | * | |
788 | * Will issue either WRITE SAME(10) or WRITE SAME(16) depending on | |
789 | * preference indicated by target device. | |
790 | **/ | |
791 | static int sd_setup_write_same_cmnd(struct scsi_device *sdp, struct request *rq) | |
792 | { | |
793 | struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); | |
794 | struct bio *bio = rq->bio; | |
795 | sector_t sector = blk_rq_pos(rq); | |
796 | unsigned int nr_sectors = blk_rq_sectors(rq); | |
797 | unsigned int nr_bytes = blk_rq_bytes(rq); | |
798 | int ret; | |
799 | ||
800 | if (sdkp->device->no_write_same) | |
801 | return BLKPREP_KILL; | |
802 | ||
803 | BUG_ON(bio_offset(bio) || bio_iovec(bio)->bv_len != sdp->sector_size); | |
804 | ||
805 | sector >>= ilog2(sdp->sector_size) - 9; | |
806 | nr_sectors >>= ilog2(sdp->sector_size) - 9; | |
807 | ||
808 | rq->__data_len = sdp->sector_size; | |
809 | rq->timeout = SD_WRITE_SAME_TIMEOUT; | |
810 | memset(rq->cmd, 0, rq->cmd_len); | |
811 | ||
812 | if (sdkp->ws16 || sector > 0xffffffff || nr_sectors > 0xffff) { | |
813 | rq->cmd_len = 16; | |
814 | rq->cmd[0] = WRITE_SAME_16; | |
815 | put_unaligned_be64(sector, &rq->cmd[2]); | |
816 | put_unaligned_be32(nr_sectors, &rq->cmd[10]); | |
817 | } else { | |
818 | rq->cmd_len = 10; | |
819 | rq->cmd[0] = WRITE_SAME; | |
820 | put_unaligned_be32(sector, &rq->cmd[2]); | |
821 | put_unaligned_be16(nr_sectors, &rq->cmd[7]); | |
822 | } | |
823 | ||
824 | ret = scsi_setup_blk_pc_cmnd(sdp, rq); | |
825 | rq->__data_len = nr_bytes; | |
826 | ||
827 | return ret; | |
828 | } | |
829 | ||
90467c29 FT |
830 | static int scsi_setup_flush_cmnd(struct scsi_device *sdp, struct request *rq) |
831 | { | |
e3b3e624 | 832 | rq->timeout = SD_FLUSH_TIMEOUT; |
90467c29 FT |
833 | rq->retries = SD_MAX_RETRIES; |
834 | rq->cmd[0] = SYNCHRONIZE_CACHE; | |
835 | rq->cmd_len = 10; | |
836 | ||
837 | return scsi_setup_blk_pc_cmnd(sdp, rq); | |
838 | } | |
839 | ||
f1126e95 FT |
840 | static void sd_unprep_fn(struct request_queue *q, struct request *rq) |
841 | { | |
085b513f EM |
842 | struct scsi_cmnd *SCpnt = rq->special; |
843 | ||
610a6349 FT |
844 | if (rq->cmd_flags & REQ_DISCARD) { |
845 | free_page((unsigned long)rq->buffer); | |
846 | rq->buffer = NULL; | |
847 | } | |
085b513f EM |
848 | if (SCpnt->cmnd != rq->cmd) { |
849 | mempool_free(SCpnt->cmnd, sd_cdb_pool); | |
850 | SCpnt->cmnd = NULL; | |
851 | SCpnt->cmd_len = 0; | |
852 | } | |
e339c1a7 MP |
853 | } |
854 | ||
1da177e4 | 855 | /** |
2db93ce8 | 856 | * sd_prep_fn - build a scsi (read or write) command from |
1da177e4 LT |
857 | * information in the request structure. |
858 | * @SCpnt: pointer to mid-level's per scsi command structure that | |
859 | * contains request and into which the scsi command is written | |
860 | * | |
861 | * Returns 1 if successful and 0 if error (or cannot be done now). | |
862 | **/ | |
7f9a6bc4 | 863 | static int sd_prep_fn(struct request_queue *q, struct request *rq) |
1da177e4 | 864 | { |
7f9a6bc4 JB |
865 | struct scsi_cmnd *SCpnt; |
866 | struct scsi_device *sdp = q->queuedata; | |
776b23a0 | 867 | struct gendisk *disk = rq->rq_disk; |
af55ff67 | 868 | struct scsi_disk *sdkp; |
83096ebf | 869 | sector_t block = blk_rq_pos(rq); |
18351070 | 870 | sector_t threshold; |
83096ebf | 871 | unsigned int this_count = blk_rq_sectors(rq); |
bd623e79 | 872 | int ret, host_dif; |
4e7392ec | 873 | unsigned char protect; |
7f9a6bc4 | 874 | |
e339c1a7 MP |
875 | /* |
876 | * Discard request come in as REQ_TYPE_FS but we turn them into | |
877 | * block PC requests to make life easier. | |
878 | */ | |
66ac0280 | 879 | if (rq->cmd_flags & REQ_DISCARD) { |
26e85fcd | 880 | ret = sd_setup_discard_cmnd(sdp, rq); |
66ac0280 | 881 | goto out; |
5db44863 MP |
882 | } else if (rq->cmd_flags & REQ_WRITE_SAME) { |
883 | ret = sd_setup_write_same_cmnd(sdp, rq); | |
884 | goto out; | |
90467c29 FT |
885 | } else if (rq->cmd_flags & REQ_FLUSH) { |
886 | ret = scsi_setup_flush_cmnd(sdp, rq); | |
887 | goto out; | |
66ac0280 | 888 | } else if (rq->cmd_type == REQ_TYPE_BLOCK_PC) { |
7f9a6bc4 JB |
889 | ret = scsi_setup_blk_pc_cmnd(sdp, rq); |
890 | goto out; | |
891 | } else if (rq->cmd_type != REQ_TYPE_FS) { | |
892 | ret = BLKPREP_KILL; | |
893 | goto out; | |
894 | } | |
895 | ret = scsi_setup_fs_cmnd(sdp, rq); | |
896 | if (ret != BLKPREP_OK) | |
897 | goto out; | |
898 | SCpnt = rq->special; | |
af55ff67 | 899 | sdkp = scsi_disk(disk); |
7f9a6bc4 JB |
900 | |
901 | /* from here on until we're complete, any goto out | |
902 | * is used for a killable error condition */ | |
903 | ret = BLKPREP_KILL; | |
1da177e4 | 904 | |
fa0d34be | 905 | SCSI_LOG_HLQUEUE(1, scmd_printk(KERN_INFO, SCpnt, |
2db93ce8 | 906 | "sd_prep_fn: block=%llu, " |
fa0d34be MP |
907 | "count=%d\n", |
908 | (unsigned long long)block, | |
909 | this_count)); | |
1da177e4 LT |
910 | |
911 | if (!sdp || !scsi_device_online(sdp) || | |
83096ebf | 912 | block + blk_rq_sectors(rq) > get_capacity(disk)) { |
fa0d34be | 913 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
83096ebf TH |
914 | "Finishing %u sectors\n", |
915 | blk_rq_sectors(rq))); | |
fa0d34be MP |
916 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
917 | "Retry with 0x%p\n", SCpnt)); | |
7f9a6bc4 | 918 | goto out; |
1da177e4 LT |
919 | } |
920 | ||
921 | if (sdp->changed) { | |
922 | /* | |
923 | * quietly refuse to do anything to a changed disc until | |
924 | * the changed bit has been reset | |
925 | */ | |
3ff5588d | 926 | /* printk("SCSI disk has been changed or is not present. Prohibiting further I/O.\n"); */ |
7f9a6bc4 | 927 | goto out; |
1da177e4 | 928 | } |
7f9a6bc4 | 929 | |
a0899d4d | 930 | /* |
18351070 LT |
931 | * Some SD card readers can't handle multi-sector accesses which touch |
932 | * the last one or two hardware sectors. Split accesses as needed. | |
a0899d4d | 933 | */ |
18351070 LT |
934 | threshold = get_capacity(disk) - SD_LAST_BUGGY_SECTORS * |
935 | (sdp->sector_size / 512); | |
936 | ||
937 | if (unlikely(sdp->last_sector_bug && block + this_count > threshold)) { | |
938 | if (block < threshold) { | |
939 | /* Access up to the threshold but not beyond */ | |
940 | this_count = threshold - block; | |
941 | } else { | |
942 | /* Access only a single hardware sector */ | |
943 | this_count = sdp->sector_size / 512; | |
944 | } | |
945 | } | |
a0899d4d | 946 | |
fa0d34be MP |
947 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, "block=%llu\n", |
948 | (unsigned long long)block)); | |
1da177e4 LT |
949 | |
950 | /* | |
951 | * If we have a 1K hardware sectorsize, prevent access to single | |
952 | * 512 byte sectors. In theory we could handle this - in fact | |
953 | * the scsi cdrom driver must be able to handle this because | |
954 | * we typically use 1K blocksizes, and cdroms typically have | |
955 | * 2K hardware sectorsizes. Of course, things are simpler | |
956 | * with the cdrom, since it is read-only. For performance | |
957 | * reasons, the filesystems should be able to handle this | |
958 | * and not force the scsi disk driver to use bounce buffers | |
959 | * for this. | |
960 | */ | |
961 | if (sdp->sector_size == 1024) { | |
83096ebf | 962 | if ((block & 1) || (blk_rq_sectors(rq) & 1)) { |
e73aec82 MP |
963 | scmd_printk(KERN_ERR, SCpnt, |
964 | "Bad block number requested\n"); | |
7f9a6bc4 | 965 | goto out; |
1da177e4 LT |
966 | } else { |
967 | block = block >> 1; | |
968 | this_count = this_count >> 1; | |
969 | } | |
970 | } | |
971 | if (sdp->sector_size == 2048) { | |
83096ebf | 972 | if ((block & 3) || (blk_rq_sectors(rq) & 3)) { |
e73aec82 MP |
973 | scmd_printk(KERN_ERR, SCpnt, |
974 | "Bad block number requested\n"); | |
7f9a6bc4 | 975 | goto out; |
1da177e4 LT |
976 | } else { |
977 | block = block >> 2; | |
978 | this_count = this_count >> 2; | |
979 | } | |
980 | } | |
981 | if (sdp->sector_size == 4096) { | |
83096ebf | 982 | if ((block & 7) || (blk_rq_sectors(rq) & 7)) { |
e73aec82 MP |
983 | scmd_printk(KERN_ERR, SCpnt, |
984 | "Bad block number requested\n"); | |
7f9a6bc4 | 985 | goto out; |
1da177e4 LT |
986 | } else { |
987 | block = block >> 3; | |
988 | this_count = this_count >> 3; | |
989 | } | |
990 | } | |
991 | if (rq_data_dir(rq) == WRITE) { | |
992 | if (!sdp->writeable) { | |
7f9a6bc4 | 993 | goto out; |
1da177e4 LT |
994 | } |
995 | SCpnt->cmnd[0] = WRITE_6; | |
996 | SCpnt->sc_data_direction = DMA_TO_DEVICE; | |
af55ff67 | 997 | |
8c579ab6 MP |
998 | if (blk_integrity_rq(rq)) |
999 | sd_dif_prepare(rq, block, sdp->sector_size); | |
af55ff67 | 1000 | |
1da177e4 LT |
1001 | } else if (rq_data_dir(rq) == READ) { |
1002 | SCpnt->cmnd[0] = READ_6; | |
1003 | SCpnt->sc_data_direction = DMA_FROM_DEVICE; | |
1004 | } else { | |
e73aec82 | 1005 | scmd_printk(KERN_ERR, SCpnt, "Unknown command %x\n", rq->cmd_flags); |
7f9a6bc4 | 1006 | goto out; |
1da177e4 LT |
1007 | } |
1008 | ||
fa0d34be | 1009 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
83096ebf | 1010 | "%s %d/%u 512 byte blocks.\n", |
fa0d34be MP |
1011 | (rq_data_dir(rq) == WRITE) ? |
1012 | "writing" : "reading", this_count, | |
83096ebf | 1013 | blk_rq_sectors(rq))); |
1da177e4 | 1014 | |
af55ff67 | 1015 | /* Set RDPROTECT/WRPROTECT if disk is formatted with DIF */ |
bd623e79 MP |
1016 | host_dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type); |
1017 | if (host_dif) | |
4e7392ec | 1018 | protect = 1 << 5; |
af55ff67 | 1019 | else |
4e7392ec MP |
1020 | protect = 0; |
1021 | ||
1022 | if (host_dif == SD_DIF_TYPE2_PROTECTION) { | |
1023 | SCpnt->cmnd = mempool_alloc(sd_cdb_pool, GFP_ATOMIC); | |
1024 | ||
1025 | if (unlikely(SCpnt->cmnd == NULL)) { | |
1026 | ret = BLKPREP_DEFER; | |
1027 | goto out; | |
1028 | } | |
af55ff67 | 1029 | |
4e7392ec MP |
1030 | SCpnt->cmd_len = SD_EXT_CDB_SIZE; |
1031 | memset(SCpnt->cmnd, 0, SCpnt->cmd_len); | |
1032 | SCpnt->cmnd[0] = VARIABLE_LENGTH_CMD; | |
1033 | SCpnt->cmnd[7] = 0x18; | |
1034 | SCpnt->cmnd[9] = (rq_data_dir(rq) == READ) ? READ_32 : WRITE_32; | |
33659ebb | 1035 | SCpnt->cmnd[10] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
4e7392ec MP |
1036 | |
1037 | /* LBA */ | |
1038 | SCpnt->cmnd[12] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0; | |
1039 | SCpnt->cmnd[13] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0; | |
1040 | SCpnt->cmnd[14] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0; | |
1041 | SCpnt->cmnd[15] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0; | |
1042 | SCpnt->cmnd[16] = (unsigned char) (block >> 24) & 0xff; | |
1043 | SCpnt->cmnd[17] = (unsigned char) (block >> 16) & 0xff; | |
1044 | SCpnt->cmnd[18] = (unsigned char) (block >> 8) & 0xff; | |
1045 | SCpnt->cmnd[19] = (unsigned char) block & 0xff; | |
1046 | ||
1047 | /* Expected Indirect LBA */ | |
1048 | SCpnt->cmnd[20] = (unsigned char) (block >> 24) & 0xff; | |
1049 | SCpnt->cmnd[21] = (unsigned char) (block >> 16) & 0xff; | |
1050 | SCpnt->cmnd[22] = (unsigned char) (block >> 8) & 0xff; | |
1051 | SCpnt->cmnd[23] = (unsigned char) block & 0xff; | |
1052 | ||
1053 | /* Transfer length */ | |
1054 | SCpnt->cmnd[28] = (unsigned char) (this_count >> 24) & 0xff; | |
1055 | SCpnt->cmnd[29] = (unsigned char) (this_count >> 16) & 0xff; | |
1056 | SCpnt->cmnd[30] = (unsigned char) (this_count >> 8) & 0xff; | |
1057 | SCpnt->cmnd[31] = (unsigned char) this_count & 0xff; | |
53ad570b | 1058 | } else if (sdp->use_16_for_rw) { |
1da177e4 | 1059 | SCpnt->cmnd[0] += READ_16 - READ_6; |
33659ebb | 1060 | SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
1da177e4 LT |
1061 | SCpnt->cmnd[2] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0; |
1062 | SCpnt->cmnd[3] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0; | |
1063 | SCpnt->cmnd[4] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0; | |
1064 | SCpnt->cmnd[5] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0; | |
1065 | SCpnt->cmnd[6] = (unsigned char) (block >> 24) & 0xff; | |
1066 | SCpnt->cmnd[7] = (unsigned char) (block >> 16) & 0xff; | |
1067 | SCpnt->cmnd[8] = (unsigned char) (block >> 8) & 0xff; | |
1068 | SCpnt->cmnd[9] = (unsigned char) block & 0xff; | |
1069 | SCpnt->cmnd[10] = (unsigned char) (this_count >> 24) & 0xff; | |
1070 | SCpnt->cmnd[11] = (unsigned char) (this_count >> 16) & 0xff; | |
1071 | SCpnt->cmnd[12] = (unsigned char) (this_count >> 8) & 0xff; | |
1072 | SCpnt->cmnd[13] = (unsigned char) this_count & 0xff; | |
1073 | SCpnt->cmnd[14] = SCpnt->cmnd[15] = 0; | |
1074 | } else if ((this_count > 0xff) || (block > 0x1fffff) || | |
af55ff67 | 1075 | scsi_device_protection(SCpnt->device) || |
1da177e4 LT |
1076 | SCpnt->device->use_10_for_rw) { |
1077 | if (this_count > 0xffff) | |
1078 | this_count = 0xffff; | |
1079 | ||
1080 | SCpnt->cmnd[0] += READ_10 - READ_6; | |
33659ebb | 1081 | SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
1da177e4 LT |
1082 | SCpnt->cmnd[2] = (unsigned char) (block >> 24) & 0xff; |
1083 | SCpnt->cmnd[3] = (unsigned char) (block >> 16) & 0xff; | |
1084 | SCpnt->cmnd[4] = (unsigned char) (block >> 8) & 0xff; | |
1085 | SCpnt->cmnd[5] = (unsigned char) block & 0xff; | |
1086 | SCpnt->cmnd[6] = SCpnt->cmnd[9] = 0; | |
1087 | SCpnt->cmnd[7] = (unsigned char) (this_count >> 8) & 0xff; | |
1088 | SCpnt->cmnd[8] = (unsigned char) this_count & 0xff; | |
1089 | } else { | |
33659ebb | 1090 | if (unlikely(rq->cmd_flags & REQ_FUA)) { |
007365ad TH |
1091 | /* |
1092 | * This happens only if this drive failed | |
1093 | * 10byte rw command with ILLEGAL_REQUEST | |
1094 | * during operation and thus turned off | |
1095 | * use_10_for_rw. | |
1096 | */ | |
e73aec82 MP |
1097 | scmd_printk(KERN_ERR, SCpnt, |
1098 | "FUA write on READ/WRITE(6) drive\n"); | |
7f9a6bc4 | 1099 | goto out; |
007365ad TH |
1100 | } |
1101 | ||
1da177e4 LT |
1102 | SCpnt->cmnd[1] |= (unsigned char) ((block >> 16) & 0x1f); |
1103 | SCpnt->cmnd[2] = (unsigned char) ((block >> 8) & 0xff); | |
1104 | SCpnt->cmnd[3] = (unsigned char) block & 0xff; | |
1105 | SCpnt->cmnd[4] = (unsigned char) this_count; | |
1106 | SCpnt->cmnd[5] = 0; | |
1107 | } | |
30b0c37b | 1108 | SCpnt->sdb.length = this_count * sdp->sector_size; |
1da177e4 | 1109 | |
af55ff67 | 1110 | /* If DIF or DIX is enabled, tell HBA how to handle request */ |
bd623e79 | 1111 | if (host_dif || scsi_prot_sg_count(SCpnt)) |
35e1a5d9 | 1112 | sd_prot_op(SCpnt, host_dif); |
af55ff67 | 1113 | |
1da177e4 LT |
1114 | /* |
1115 | * We shouldn't disconnect in the middle of a sector, so with a dumb | |
1116 | * host adapter, it's safe to assume that we can at least transfer | |
1117 | * this many bytes between each connect / disconnect. | |
1118 | */ | |
1119 | SCpnt->transfersize = sdp->sector_size; | |
1120 | SCpnt->underflow = this_count << 9; | |
1121 | SCpnt->allowed = SD_MAX_RETRIES; | |
1da177e4 | 1122 | |
1da177e4 LT |
1123 | /* |
1124 | * This indicates that the command is ready from our end to be | |
1125 | * queued. | |
1126 | */ | |
7f9a6bc4 JB |
1127 | ret = BLKPREP_OK; |
1128 | out: | |
1129 | return scsi_prep_return(q, rq, ret); | |
1da177e4 LT |
1130 | } |
1131 | ||
1132 | /** | |
1133 | * sd_open - open a scsi disk device | |
1134 | * @inode: only i_rdev member may be used | |
1135 | * @filp: only f_mode and f_flags may be used | |
1136 | * | |
1137 | * Returns 0 if successful. Returns a negated errno value in case | |
1138 | * of error. | |
1139 | * | |
1140 | * Note: This can be called from a user context (e.g. fsck(1) ) | |
1141 | * or from within the kernel (e.g. as a result of a mount(1) ). | |
1142 | * In the latter case @inode and @filp carry an abridged amount | |
1143 | * of information as noted above. | |
409f3499 AB |
1144 | * |
1145 | * Locking: called with bdev->bd_mutex held. | |
1da177e4 | 1146 | **/ |
0338e291 | 1147 | static int sd_open(struct block_device *bdev, fmode_t mode) |
1da177e4 | 1148 | { |
0338e291 | 1149 | struct scsi_disk *sdkp = scsi_disk_get(bdev->bd_disk); |
1da177e4 LT |
1150 | struct scsi_device *sdev; |
1151 | int retval; | |
1152 | ||
0338e291 | 1153 | if (!sdkp) |
1da177e4 LT |
1154 | return -ENXIO; |
1155 | ||
fa0d34be | 1156 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_open\n")); |
1da177e4 LT |
1157 | |
1158 | sdev = sdkp->device; | |
1159 | ||
1160 | /* | |
1161 | * If the device is in error recovery, wait until it is done. | |
1162 | * If the device is offline, then disallow any access to it. | |
1163 | */ | |
1164 | retval = -ENXIO; | |
1165 | if (!scsi_block_when_processing_errors(sdev)) | |
1166 | goto error_out; | |
1167 | ||
1168 | if (sdev->removable || sdkp->write_prot) | |
0338e291 | 1169 | check_disk_change(bdev); |
1da177e4 LT |
1170 | |
1171 | /* | |
1172 | * If the drive is empty, just let the open fail. | |
1173 | */ | |
1174 | retval = -ENOMEDIUM; | |
0338e291 | 1175 | if (sdev->removable && !sdkp->media_present && !(mode & FMODE_NDELAY)) |
1da177e4 LT |
1176 | goto error_out; |
1177 | ||
1178 | /* | |
1179 | * If the device has the write protect tab set, have the open fail | |
1180 | * if the user expects to be able to write to the thing. | |
1181 | */ | |
1182 | retval = -EROFS; | |
0338e291 | 1183 | if (sdkp->write_prot && (mode & FMODE_WRITE)) |
1da177e4 LT |
1184 | goto error_out; |
1185 | ||
1186 | /* | |
1187 | * It is possible that the disk changing stuff resulted in | |
1188 | * the device being taken offline. If this is the case, | |
1189 | * report this to the user, and don't pretend that the | |
1190 | * open actually succeeded. | |
1191 | */ | |
1192 | retval = -ENXIO; | |
1193 | if (!scsi_device_online(sdev)) | |
1194 | goto error_out; | |
1195 | ||
409f3499 | 1196 | if ((atomic_inc_return(&sdkp->openers) == 1) && sdev->removable) { |
1da177e4 LT |
1197 | if (scsi_block_when_processing_errors(sdev)) |
1198 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT); | |
1199 | } | |
1200 | ||
1201 | return 0; | |
1202 | ||
1203 | error_out: | |
1204 | scsi_disk_put(sdkp); | |
1205 | return retval; | |
1206 | } | |
1207 | ||
1208 | /** | |
1209 | * sd_release - invoked when the (last) close(2) is called on this | |
1210 | * scsi disk. | |
1211 | * @inode: only i_rdev member may be used | |
1212 | * @filp: only f_mode and f_flags may be used | |
1213 | * | |
1214 | * Returns 0. | |
1215 | * | |
1216 | * Note: may block (uninterruptible) if error recovery is underway | |
1217 | * on this disk. | |
409f3499 AB |
1218 | * |
1219 | * Locking: called with bdev->bd_mutex held. | |
1da177e4 | 1220 | **/ |
db2a144b | 1221 | static void sd_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 1222 | { |
1da177e4 LT |
1223 | struct scsi_disk *sdkp = scsi_disk(disk); |
1224 | struct scsi_device *sdev = sdkp->device; | |
1225 | ||
56937f7b | 1226 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_release\n")); |
1da177e4 | 1227 | |
7e443312 | 1228 | if (atomic_dec_return(&sdkp->openers) == 0 && sdev->removable) { |
1da177e4 LT |
1229 | if (scsi_block_when_processing_errors(sdev)) |
1230 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW); | |
1231 | } | |
1232 | ||
1233 | /* | |
1234 | * XXX and what if there are packets in flight and this close() | |
1235 | * XXX is followed by a "rmmod sd_mod"? | |
1236 | */ | |
478a8a05 | 1237 | |
1da177e4 | 1238 | scsi_disk_put(sdkp); |
1da177e4 LT |
1239 | } |
1240 | ||
a885c8c4 | 1241 | static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
1da177e4 LT |
1242 | { |
1243 | struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk); | |
1244 | struct scsi_device *sdp = sdkp->device; | |
1245 | struct Scsi_Host *host = sdp->host; | |
1246 | int diskinfo[4]; | |
1247 | ||
1248 | /* default to most commonly used values */ | |
1249 | diskinfo[0] = 0x40; /* 1 << 6 */ | |
1250 | diskinfo[1] = 0x20; /* 1 << 5 */ | |
1251 | diskinfo[2] = sdkp->capacity >> 11; | |
1252 | ||
1253 | /* override with calculated, extended default, or driver values */ | |
1254 | if (host->hostt->bios_param) | |
1255 | host->hostt->bios_param(sdp, bdev, sdkp->capacity, diskinfo); | |
1256 | else | |
1257 | scsicam_bios_param(bdev, sdkp->capacity, diskinfo); | |
1258 | ||
a885c8c4 CH |
1259 | geo->heads = diskinfo[0]; |
1260 | geo->sectors = diskinfo[1]; | |
1261 | geo->cylinders = diskinfo[2]; | |
1da177e4 LT |
1262 | return 0; |
1263 | } | |
1264 | ||
1265 | /** | |
1266 | * sd_ioctl - process an ioctl | |
1267 | * @inode: only i_rdev/i_bdev members may be used | |
1268 | * @filp: only f_mode and f_flags may be used | |
1269 | * @cmd: ioctl command number | |
1270 | * @arg: this is third argument given to ioctl(2) system call. | |
1271 | * Often contains a pointer. | |
1272 | * | |
25985edc | 1273 | * Returns 0 if successful (some ioctls return positive numbers on |
1da177e4 LT |
1274 | * success as well). Returns a negated errno value in case of error. |
1275 | * | |
1276 | * Note: most ioctls are forward onto the block subsystem or further | |
3a4fa0a2 | 1277 | * down in the scsi subsystem. |
1da177e4 | 1278 | **/ |
0338e291 | 1279 | static int sd_ioctl(struct block_device *bdev, fmode_t mode, |
1da177e4 LT |
1280 | unsigned int cmd, unsigned long arg) |
1281 | { | |
1da177e4 | 1282 | struct gendisk *disk = bdev->bd_disk; |
fe2d1851 NN |
1283 | struct scsi_disk *sdkp = scsi_disk(disk); |
1284 | struct scsi_device *sdp = sdkp->device; | |
1da177e4 LT |
1285 | void __user *p = (void __user *)arg; |
1286 | int error; | |
1287 | ||
fe2d1851 NN |
1288 | SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO, sdkp, "sd_ioctl: disk=%s, " |
1289 | "cmd=0x%x\n", disk->disk_name, cmd)); | |
1da177e4 | 1290 | |
0bfc96cb PB |
1291 | error = scsi_verify_blk_ioctl(bdev, cmd); |
1292 | if (error < 0) | |
1293 | return error; | |
1294 | ||
1da177e4 LT |
1295 | /* |
1296 | * If we are in the middle of error recovery, don't let anyone | |
1297 | * else try and use this device. Also, if error recovery fails, it | |
1298 | * may try and take the device offline, in which case all further | |
1299 | * access to the device is prohibited. | |
1300 | */ | |
83ff6fe8 | 1301 | error = scsi_nonblockable_ioctl(sdp, cmd, p, |
fd4ce1ac | 1302 | (mode & FMODE_NDELAY) != 0); |
1da177e4 | 1303 | if (!scsi_block_when_processing_errors(sdp) || !error) |
8a6cfeb6 | 1304 | goto out; |
1da177e4 | 1305 | |
1da177e4 LT |
1306 | /* |
1307 | * Send SCSI addressing ioctls directly to mid level, send other | |
1308 | * ioctls to block level and then onto mid level if they can't be | |
1309 | * resolved. | |
1310 | */ | |
1311 | switch (cmd) { | |
1312 | case SCSI_IOCTL_GET_IDLUN: | |
1313 | case SCSI_IOCTL_GET_BUS_NUMBER: | |
8a6cfeb6 AB |
1314 | error = scsi_ioctl(sdp, cmd, p); |
1315 | break; | |
1da177e4 | 1316 | default: |
577ebb37 | 1317 | error = scsi_cmd_blk_ioctl(bdev, mode, cmd, p); |
1da177e4 | 1318 | if (error != -ENOTTY) |
8a6cfeb6 AB |
1319 | break; |
1320 | error = scsi_ioctl(sdp, cmd, p); | |
1321 | break; | |
1da177e4 | 1322 | } |
8a6cfeb6 | 1323 | out: |
8a6cfeb6 | 1324 | return error; |
1da177e4 LT |
1325 | } |
1326 | ||
1327 | static void set_media_not_present(struct scsi_disk *sdkp) | |
1328 | { | |
2bae0093 TH |
1329 | if (sdkp->media_present) |
1330 | sdkp->device->changed = 1; | |
1331 | ||
1332 | if (sdkp->device->removable) { | |
1333 | sdkp->media_present = 0; | |
1334 | sdkp->capacity = 0; | |
1335 | } | |
1336 | } | |
1337 | ||
1338 | static int media_not_present(struct scsi_disk *sdkp, | |
1339 | struct scsi_sense_hdr *sshdr) | |
1340 | { | |
1341 | if (!scsi_sense_valid(sshdr)) | |
1342 | return 0; | |
1343 | ||
1344 | /* not invoked for commands that could return deferred errors */ | |
1345 | switch (sshdr->sense_key) { | |
1346 | case UNIT_ATTENTION: | |
1347 | case NOT_READY: | |
1348 | /* medium not present */ | |
1349 | if (sshdr->asc == 0x3A) { | |
1350 | set_media_not_present(sdkp); | |
1351 | return 1; | |
1352 | } | |
1353 | } | |
1354 | return 0; | |
1da177e4 LT |
1355 | } |
1356 | ||
1357 | /** | |
2bae0093 TH |
1358 | * sd_check_events - check media events |
1359 | * @disk: kernel device descriptor | |
1360 | * @clearing: disk events currently being cleared | |
1da177e4 | 1361 | * |
2bae0093 | 1362 | * Returns mask of DISK_EVENT_*. |
1da177e4 LT |
1363 | * |
1364 | * Note: this function is invoked from the block subsystem. | |
1365 | **/ | |
2bae0093 | 1366 | static unsigned int sd_check_events(struct gendisk *disk, unsigned int clearing) |
1da177e4 LT |
1367 | { |
1368 | struct scsi_disk *sdkp = scsi_disk(disk); | |
1369 | struct scsi_device *sdp = sdkp->device; | |
001aac25 | 1370 | struct scsi_sense_hdr *sshdr = NULL; |
1da177e4 LT |
1371 | int retval; |
1372 | ||
2bae0093 | 1373 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_check_events\n")); |
1da177e4 LT |
1374 | |
1375 | /* | |
1376 | * If the device is offline, don't send any commands - just pretend as | |
1377 | * if the command failed. If the device ever comes back online, we | |
1378 | * can deal with it then. It is only because of unrecoverable errors | |
1379 | * that we would ever take a device offline in the first place. | |
1380 | */ | |
285e9670 KS |
1381 | if (!scsi_device_online(sdp)) { |
1382 | set_media_not_present(sdkp); | |
285e9670 KS |
1383 | goto out; |
1384 | } | |
1da177e4 LT |
1385 | |
1386 | /* | |
1387 | * Using TEST_UNIT_READY enables differentiation between drive with | |
1388 | * no cartridge loaded - NOT READY, drive with changed cartridge - | |
1389 | * UNIT ATTENTION, or with same cartridge - GOOD STATUS. | |
1390 | * | |
1391 | * Drives that auto spin down. eg iomega jaz 1G, will be started | |
1392 | * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever | |
1393 | * sd_revalidate() is called. | |
1394 | */ | |
1395 | retval = -ENODEV; | |
285e9670 | 1396 | |
001aac25 JB |
1397 | if (scsi_block_when_processing_errors(sdp)) { |
1398 | sshdr = kzalloc(sizeof(*sshdr), GFP_KERNEL); | |
1399 | retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, SD_MAX_RETRIES, | |
1400 | sshdr); | |
1401 | } | |
1da177e4 | 1402 | |
2bae0093 TH |
1403 | /* failed to execute TUR, assume media not present */ |
1404 | if (host_byte(retval)) { | |
285e9670 | 1405 | set_media_not_present(sdkp); |
285e9670 KS |
1406 | goto out; |
1407 | } | |
1da177e4 | 1408 | |
2bae0093 TH |
1409 | if (media_not_present(sdkp, sshdr)) |
1410 | goto out; | |
1411 | ||
1da177e4 LT |
1412 | /* |
1413 | * For removable scsi disk we have to recognise the presence | |
2bae0093 | 1414 | * of a disk in the drive. |
1da177e4 | 1415 | */ |
2bae0093 TH |
1416 | if (!sdkp->media_present) |
1417 | sdp->changed = 1; | |
1da177e4 | 1418 | sdkp->media_present = 1; |
285e9670 | 1419 | out: |
3ff5588d | 1420 | /* |
2bae0093 | 1421 | * sdp->changed is set under the following conditions: |
3ff5588d | 1422 | * |
2bae0093 TH |
1423 | * Medium present state has changed in either direction. |
1424 | * Device has indicated UNIT_ATTENTION. | |
3ff5588d | 1425 | */ |
001aac25 | 1426 | kfree(sshdr); |
2bae0093 TH |
1427 | retval = sdp->changed ? DISK_EVENT_MEDIA_CHANGE : 0; |
1428 | sdp->changed = 0; | |
1da177e4 | 1429 | return retval; |
1da177e4 LT |
1430 | } |
1431 | ||
e73aec82 | 1432 | static int sd_sync_cache(struct scsi_disk *sdkp) |
1da177e4 | 1433 | { |
1da177e4 | 1434 | int retries, res; |
e73aec82 | 1435 | struct scsi_device *sdp = sdkp->device; |
ea73a9f2 | 1436 | struct scsi_sense_hdr sshdr; |
1da177e4 LT |
1437 | |
1438 | if (!scsi_device_online(sdp)) | |
1439 | return -ENODEV; | |
1440 | ||
1da177e4 | 1441 | |
1da177e4 LT |
1442 | for (retries = 3; retries > 0; --retries) { |
1443 | unsigned char cmd[10] = { 0 }; | |
1444 | ||
1445 | cmd[0] = SYNCHRONIZE_CACHE; | |
1446 | /* | |
1447 | * Leave the rest of the command zero to indicate | |
1448 | * flush everything. | |
1449 | */ | |
9b21493c LM |
1450 | res = scsi_execute_req_flags(sdp, cmd, DMA_NONE, NULL, 0, |
1451 | &sshdr, SD_FLUSH_TIMEOUT, | |
1452 | SD_MAX_RETRIES, NULL, REQ_PM); | |
ea73a9f2 | 1453 | if (res == 0) |
1da177e4 LT |
1454 | break; |
1455 | } | |
1456 | ||
e73aec82 MP |
1457 | if (res) { |
1458 | sd_print_result(sdkp, res); | |
1459 | if (driver_byte(res) & DRIVER_SENSE) | |
1460 | sd_print_sense_hdr(sdkp, &sshdr); | |
1da177e4 LT |
1461 | } |
1462 | ||
3721050a TH |
1463 | if (res) |
1464 | return -EIO; | |
1465 | return 0; | |
1da177e4 LT |
1466 | } |
1467 | ||
1da177e4 LT |
1468 | static void sd_rescan(struct device *dev) |
1469 | { | |
39b7f1e2 AS |
1470 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
1471 | ||
1472 | if (sdkp) { | |
f98a8cae | 1473 | revalidate_disk(sdkp->disk); |
39b7f1e2 AS |
1474 | scsi_disk_put(sdkp); |
1475 | } | |
1da177e4 LT |
1476 | } |
1477 | ||
1478 | ||
1479 | #ifdef CONFIG_COMPAT | |
1480 | /* | |
1481 | * This gets directly called from VFS. When the ioctl | |
1482 | * is not recognized we go back to the other translation paths. | |
1483 | */ | |
0338e291 AV |
1484 | static int sd_compat_ioctl(struct block_device *bdev, fmode_t mode, |
1485 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1486 | { |
0338e291 | 1487 | struct scsi_device *sdev = scsi_disk(bdev->bd_disk)->device; |
0bfc96cb PB |
1488 | int ret; |
1489 | ||
1490 | ret = scsi_verify_blk_ioctl(bdev, cmd); | |
1491 | if (ret < 0) | |
1492 | return ret; | |
1da177e4 LT |
1493 | |
1494 | /* | |
1495 | * If we are in the middle of error recovery, don't let anyone | |
1496 | * else try and use this device. Also, if error recovery fails, it | |
1497 | * may try and take the device offline, in which case all further | |
1498 | * access to the device is prohibited. | |
1499 | */ | |
1500 | if (!scsi_block_when_processing_errors(sdev)) | |
1501 | return -ENODEV; | |
1502 | ||
1503 | if (sdev->host->hostt->compat_ioctl) { | |
1da177e4 LT |
1504 | ret = sdev->host->hostt->compat_ioctl(sdev, cmd, (void __user *)arg); |
1505 | ||
1506 | return ret; | |
1507 | } | |
1508 | ||
1509 | /* | |
1510 | * Let the static ioctl translation table take care of it. | |
1511 | */ | |
1512 | return -ENOIOCTLCMD; | |
1513 | } | |
1514 | #endif | |
1515 | ||
83d5cde4 | 1516 | static const struct block_device_operations sd_fops = { |
1da177e4 | 1517 | .owner = THIS_MODULE, |
0338e291 AV |
1518 | .open = sd_open, |
1519 | .release = sd_release, | |
8a6cfeb6 | 1520 | .ioctl = sd_ioctl, |
a885c8c4 | 1521 | .getgeo = sd_getgeo, |
1da177e4 | 1522 | #ifdef CONFIG_COMPAT |
0338e291 | 1523 | .compat_ioctl = sd_compat_ioctl, |
1da177e4 | 1524 | #endif |
2bae0093 | 1525 | .check_events = sd_check_events, |
1da177e4 | 1526 | .revalidate_disk = sd_revalidate_disk, |
72ec24bd | 1527 | .unlock_native_capacity = sd_unlock_native_capacity, |
1da177e4 LT |
1528 | }; |
1529 | ||
18a4d0a2 MP |
1530 | /** |
1531 | * sd_eh_action - error handling callback | |
1532 | * @scmd: sd-issued command that has failed | |
1533 | * @eh_cmnd: The command that was sent during error handling | |
1534 | * @eh_cmnd_len: Length of eh_cmnd in bytes | |
1535 | * @eh_disp: The recovery disposition suggested by the midlayer | |
1536 | * | |
1537 | * This function is called by the SCSI midlayer upon completion of | |
1538 | * an error handling command (TEST UNIT READY, START STOP UNIT, | |
1539 | * etc.) The command sent to the device by the error handler is | |
1540 | * stored in eh_cmnd. The result of sending the eh command is | |
1541 | * passed in eh_disp. | |
1542 | **/ | |
1543 | static int sd_eh_action(struct scsi_cmnd *scmd, unsigned char *eh_cmnd, | |
1544 | int eh_cmnd_len, int eh_disp) | |
1545 | { | |
1546 | struct scsi_disk *sdkp = scsi_disk(scmd->request->rq_disk); | |
1547 | ||
1548 | if (!scsi_device_online(scmd->device) || | |
1549 | !scsi_medium_access_command(scmd)) | |
1550 | return eh_disp; | |
1551 | ||
1552 | /* | |
1553 | * The device has timed out executing a medium access command. | |
1554 | * However, the TEST UNIT READY command sent during error | |
1555 | * handling completed successfully. Either the device is in the | |
1556 | * process of recovering or has it suffered an internal failure | |
1557 | * that prevents access to the storage medium. | |
1558 | */ | |
1559 | if (host_byte(scmd->result) == DID_TIME_OUT && eh_disp == SUCCESS && | |
1560 | eh_cmnd_len && eh_cmnd[0] == TEST_UNIT_READY) | |
1561 | sdkp->medium_access_timed_out++; | |
1562 | ||
1563 | /* | |
1564 | * If the device keeps failing read/write commands but TEST UNIT | |
1565 | * READY always completes successfully we assume that medium | |
1566 | * access is no longer possible and take the device offline. | |
1567 | */ | |
1568 | if (sdkp->medium_access_timed_out >= sdkp->max_medium_access_timeouts) { | |
1569 | scmd_printk(KERN_ERR, scmd, | |
1570 | "Medium access timeout failure. Offlining disk!\n"); | |
1571 | scsi_device_set_state(scmd->device, SDEV_OFFLINE); | |
1572 | ||
1573 | return FAILED; | |
1574 | } | |
1575 | ||
1576 | return eh_disp; | |
1577 | } | |
1578 | ||
af55ff67 MP |
1579 | static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd) |
1580 | { | |
83096ebf TH |
1581 | u64 start_lba = blk_rq_pos(scmd->request); |
1582 | u64 end_lba = blk_rq_pos(scmd->request) + (scsi_bufflen(scmd) / 512); | |
af55ff67 MP |
1583 | u64 bad_lba; |
1584 | int info_valid; | |
a8733c7b JB |
1585 | /* |
1586 | * resid is optional but mostly filled in. When it's unused, | |
1587 | * its value is zero, so we assume the whole buffer transferred | |
1588 | */ | |
1589 | unsigned int transferred = scsi_bufflen(scmd) - scsi_get_resid(scmd); | |
1590 | unsigned int good_bytes; | |
af55ff67 | 1591 | |
33659ebb | 1592 | if (scmd->request->cmd_type != REQ_TYPE_FS) |
af55ff67 MP |
1593 | return 0; |
1594 | ||
1595 | info_valid = scsi_get_sense_info_fld(scmd->sense_buffer, | |
1596 | SCSI_SENSE_BUFFERSIZE, | |
1597 | &bad_lba); | |
1598 | if (!info_valid) | |
1599 | return 0; | |
1600 | ||
1601 | if (scsi_bufflen(scmd) <= scmd->device->sector_size) | |
1602 | return 0; | |
1603 | ||
1604 | if (scmd->device->sector_size < 512) { | |
1605 | /* only legitimate sector_size here is 256 */ | |
1606 | start_lba <<= 1; | |
1607 | end_lba <<= 1; | |
1608 | } else { | |
1609 | /* be careful ... don't want any overflows */ | |
1610 | u64 factor = scmd->device->sector_size / 512; | |
1611 | do_div(start_lba, factor); | |
1612 | do_div(end_lba, factor); | |
1613 | } | |
1614 | ||
1615 | /* The bad lba was reported incorrectly, we have no idea where | |
1616 | * the error is. | |
1617 | */ | |
1618 | if (bad_lba < start_lba || bad_lba >= end_lba) | |
1619 | return 0; | |
1620 | ||
1621 | /* This computation should always be done in terms of | |
1622 | * the resolution of the device's medium. | |
1623 | */ | |
a8733c7b JB |
1624 | good_bytes = (bad_lba - start_lba) * scmd->device->sector_size; |
1625 | return min(good_bytes, transferred); | |
af55ff67 MP |
1626 | } |
1627 | ||
1da177e4 | 1628 | /** |
7b3d9545 | 1629 | * sd_done - bottom half handler: called when the lower level |
1da177e4 LT |
1630 | * driver has completed (successfully or otherwise) a scsi command. |
1631 | * @SCpnt: mid-level's per command structure. | |
1632 | * | |
1633 | * Note: potentially run from within an ISR. Must not block. | |
1634 | **/ | |
7b3d9545 | 1635 | static int sd_done(struct scsi_cmnd *SCpnt) |
1da177e4 LT |
1636 | { |
1637 | int result = SCpnt->result; | |
af55ff67 | 1638 | unsigned int good_bytes = result ? 0 : scsi_bufflen(SCpnt); |
1da177e4 | 1639 | struct scsi_sense_hdr sshdr; |
4e7392ec | 1640 | struct scsi_disk *sdkp = scsi_disk(SCpnt->request->rq_disk); |
26e85fcd | 1641 | struct request *req = SCpnt->request; |
1da177e4 LT |
1642 | int sense_valid = 0; |
1643 | int sense_deferred = 0; | |
c98a0eb0 | 1644 | unsigned char op = SCpnt->cmnd[0]; |
5db44863 | 1645 | unsigned char unmap = SCpnt->cmnd[1] & 8; |
1da177e4 | 1646 | |
5db44863 | 1647 | if (req->cmd_flags & REQ_DISCARD || req->cmd_flags & REQ_WRITE_SAME) { |
26e85fcd MP |
1648 | if (!result) { |
1649 | good_bytes = blk_rq_bytes(req); | |
1650 | scsi_set_resid(SCpnt, 0); | |
1651 | } else { | |
1652 | good_bytes = 0; | |
1653 | scsi_set_resid(SCpnt, blk_rq_bytes(req)); | |
1654 | } | |
1655 | } | |
6a32a8ae | 1656 | |
1da177e4 LT |
1657 | if (result) { |
1658 | sense_valid = scsi_command_normalize_sense(SCpnt, &sshdr); | |
1659 | if (sense_valid) | |
1660 | sense_deferred = scsi_sense_is_deferred(&sshdr); | |
1661 | } | |
1da177e4 | 1662 | #ifdef CONFIG_SCSI_LOGGING |
fa0d34be | 1663 | SCSI_LOG_HLCOMPLETE(1, scsi_print_result(SCpnt)); |
1da177e4 | 1664 | if (sense_valid) { |
fa0d34be | 1665 | SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO, SCpnt, |
7b3d9545 | 1666 | "sd_done: sb[respc,sk,asc," |
fa0d34be MP |
1667 | "ascq]=%x,%x,%x,%x\n", |
1668 | sshdr.response_code, | |
1669 | sshdr.sense_key, sshdr.asc, | |
1670 | sshdr.ascq)); | |
1da177e4 LT |
1671 | } |
1672 | #endif | |
03aba2f7 LT |
1673 | if (driver_byte(result) != DRIVER_SENSE && |
1674 | (!sense_valid || sense_deferred)) | |
1675 | goto out; | |
1676 | ||
18a4d0a2 MP |
1677 | sdkp->medium_access_timed_out = 0; |
1678 | ||
03aba2f7 LT |
1679 | switch (sshdr.sense_key) { |
1680 | case HARDWARE_ERROR: | |
1681 | case MEDIUM_ERROR: | |
af55ff67 | 1682 | good_bytes = sd_completed_bytes(SCpnt); |
03aba2f7 LT |
1683 | break; |
1684 | case RECOVERED_ERROR: | |
af55ff67 MP |
1685 | good_bytes = scsi_bufflen(SCpnt); |
1686 | break; | |
10dab226 JW |
1687 | case NO_SENSE: |
1688 | /* This indicates a false check condition, so ignore it. An | |
1689 | * unknown amount of data was transferred so treat it as an | |
1690 | * error. | |
1691 | */ | |
1692 | scsi_print_sense("sd", SCpnt); | |
1693 | SCpnt->result = 0; | |
1694 | memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); | |
1695 | break; | |
c98a0eb0 MP |
1696 | case ABORTED_COMMAND: |
1697 | if (sshdr.asc == 0x10) /* DIF: Target detected corruption */ | |
1698 | good_bytes = sd_completed_bytes(SCpnt); | |
1699 | break; | |
1700 | case ILLEGAL_REQUEST: | |
1701 | if (sshdr.asc == 0x10) /* DIX: Host detected corruption */ | |
af55ff67 | 1702 | good_bytes = sd_completed_bytes(SCpnt); |
c98a0eb0 | 1703 | /* INVALID COMMAND OPCODE or INVALID FIELD IN CDB */ |
5db44863 MP |
1704 | if (sshdr.asc == 0x20 || sshdr.asc == 0x24) { |
1705 | switch (op) { | |
1706 | case UNMAP: | |
1707 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
1708 | break; | |
1709 | case WRITE_SAME_16: | |
1710 | case WRITE_SAME: | |
1711 | if (unmap) | |
1712 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
1713 | else { | |
1714 | sdkp->device->no_write_same = 1; | |
1715 | sd_config_write_same(sdkp); | |
1716 | ||
1717 | good_bytes = 0; | |
1718 | req->__data_len = blk_rq_bytes(req); | |
1719 | req->cmd_flags |= REQ_QUIET; | |
1720 | } | |
1721 | } | |
1722 | } | |
03aba2f7 LT |
1723 | break; |
1724 | default: | |
1725 | break; | |
1da177e4 | 1726 | } |
03aba2f7 | 1727 | out: |
af55ff67 MP |
1728 | if (rq_data_dir(SCpnt->request) == READ && scsi_prot_sg_count(SCpnt)) |
1729 | sd_dif_complete(SCpnt, good_bytes); | |
1730 | ||
7b3d9545 | 1731 | return good_bytes; |
1da177e4 LT |
1732 | } |
1733 | ||
1da177e4 LT |
1734 | /* |
1735 | * spinup disk - called only in sd_revalidate_disk() | |
1736 | */ | |
1737 | static void | |
e73aec82 | 1738 | sd_spinup_disk(struct scsi_disk *sdkp) |
ea73a9f2 | 1739 | { |
1da177e4 | 1740 | unsigned char cmd[10]; |
4451e472 | 1741 | unsigned long spintime_expire = 0; |
1da177e4 LT |
1742 | int retries, spintime; |
1743 | unsigned int the_result; | |
1744 | struct scsi_sense_hdr sshdr; | |
1745 | int sense_valid = 0; | |
1746 | ||
1747 | spintime = 0; | |
1748 | ||
1749 | /* Spin up drives, as required. Only do this at boot time */ | |
1750 | /* Spinup needs to be done for module loads too. */ | |
1751 | do { | |
1752 | retries = 0; | |
1753 | ||
1754 | do { | |
1755 | cmd[0] = TEST_UNIT_READY; | |
1756 | memset((void *) &cmd[1], 0, 9); | |
1757 | ||
ea73a9f2 JB |
1758 | the_result = scsi_execute_req(sdkp->device, cmd, |
1759 | DMA_NONE, NULL, 0, | |
1760 | &sshdr, SD_TIMEOUT, | |
f4f4e47e | 1761 | SD_MAX_RETRIES, NULL); |
1da177e4 | 1762 | |
b4d38e38 AS |
1763 | /* |
1764 | * If the drive has indicated to us that it | |
1765 | * doesn't have any media in it, don't bother | |
1766 | * with any more polling. | |
1767 | */ | |
1768 | if (media_not_present(sdkp, &sshdr)) | |
1769 | return; | |
1770 | ||
1da177e4 | 1771 | if (the_result) |
ea73a9f2 | 1772 | sense_valid = scsi_sense_valid(&sshdr); |
1da177e4 LT |
1773 | retries++; |
1774 | } while (retries < 3 && | |
1775 | (!scsi_status_is_good(the_result) || | |
1776 | ((driver_byte(the_result) & DRIVER_SENSE) && | |
1777 | sense_valid && sshdr.sense_key == UNIT_ATTENTION))); | |
1778 | ||
1da177e4 LT |
1779 | if ((driver_byte(the_result) & DRIVER_SENSE) == 0) { |
1780 | /* no sense, TUR either succeeded or failed | |
1781 | * with a status error */ | |
e73aec82 MP |
1782 | if(!spintime && !scsi_status_is_good(the_result)) { |
1783 | sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n"); | |
1784 | sd_print_result(sdkp, the_result); | |
1785 | } | |
1da177e4 LT |
1786 | break; |
1787 | } | |
1788 | ||
1789 | /* | |
1790 | * The device does not want the automatic start to be issued. | |
1791 | */ | |
33dd6f92 | 1792 | if (sdkp->device->no_start_on_add) |
1da177e4 | 1793 | break; |
1da177e4 | 1794 | |
33dd6f92 MW |
1795 | if (sense_valid && sshdr.sense_key == NOT_READY) { |
1796 | if (sshdr.asc == 4 && sshdr.ascq == 3) | |
1797 | break; /* manual intervention required */ | |
1798 | if (sshdr.asc == 4 && sshdr.ascq == 0xb) | |
1799 | break; /* standby */ | |
1800 | if (sshdr.asc == 4 && sshdr.ascq == 0xc) | |
1801 | break; /* unavailable */ | |
1802 | /* | |
1803 | * Issue command to spin up drive when not ready | |
1804 | */ | |
1da177e4 | 1805 | if (!spintime) { |
e73aec82 | 1806 | sd_printk(KERN_NOTICE, sdkp, "Spinning up disk..."); |
1da177e4 LT |
1807 | cmd[0] = START_STOP; |
1808 | cmd[1] = 1; /* Return immediately */ | |
1809 | memset((void *) &cmd[2], 0, 8); | |
1810 | cmd[4] = 1; /* Start spin cycle */ | |
d2886ea3 SR |
1811 | if (sdkp->device->start_stop_pwr_cond) |
1812 | cmd[4] |= 1 << 4; | |
ea73a9f2 JB |
1813 | scsi_execute_req(sdkp->device, cmd, DMA_NONE, |
1814 | NULL, 0, &sshdr, | |
f4f4e47e FT |
1815 | SD_TIMEOUT, SD_MAX_RETRIES, |
1816 | NULL); | |
4451e472 AS |
1817 | spintime_expire = jiffies + 100 * HZ; |
1818 | spintime = 1; | |
1da177e4 | 1819 | } |
1da177e4 LT |
1820 | /* Wait 1 second for next try */ |
1821 | msleep(1000); | |
1822 | printk("."); | |
4451e472 AS |
1823 | |
1824 | /* | |
1825 | * Wait for USB flash devices with slow firmware. | |
1826 | * Yes, this sense key/ASC combination shouldn't | |
1827 | * occur here. It's characteristic of these devices. | |
1828 | */ | |
1829 | } else if (sense_valid && | |
1830 | sshdr.sense_key == UNIT_ATTENTION && | |
1831 | sshdr.asc == 0x28) { | |
1832 | if (!spintime) { | |
1833 | spintime_expire = jiffies + 5 * HZ; | |
1834 | spintime = 1; | |
1835 | } | |
1836 | /* Wait 1 second for next try */ | |
1837 | msleep(1000); | |
1da177e4 LT |
1838 | } else { |
1839 | /* we don't understand the sense code, so it's | |
1840 | * probably pointless to loop */ | |
1841 | if(!spintime) { | |
e73aec82 MP |
1842 | sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n"); |
1843 | sd_print_sense_hdr(sdkp, &sshdr); | |
1da177e4 LT |
1844 | } |
1845 | break; | |
1846 | } | |
1847 | ||
4451e472 | 1848 | } while (spintime && time_before_eq(jiffies, spintime_expire)); |
1da177e4 LT |
1849 | |
1850 | if (spintime) { | |
1851 | if (scsi_status_is_good(the_result)) | |
1852 | printk("ready\n"); | |
1853 | else | |
1854 | printk("not responding...\n"); | |
1855 | } | |
1856 | } | |
1857 | ||
e0597d70 MP |
1858 | |
1859 | /* | |
1860 | * Determine whether disk supports Data Integrity Field. | |
1861 | */ | |
fe542396 | 1862 | static int sd_read_protection_type(struct scsi_disk *sdkp, unsigned char *buffer) |
e0597d70 MP |
1863 | { |
1864 | struct scsi_device *sdp = sdkp->device; | |
1865 | u8 type; | |
fe542396 | 1866 | int ret = 0; |
e0597d70 MP |
1867 | |
1868 | if (scsi_device_protection(sdp) == 0 || (buffer[12] & 1) == 0) | |
fe542396 | 1869 | return ret; |
35e1a5d9 MP |
1870 | |
1871 | type = ((buffer[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */ | |
1872 | ||
fe542396 MP |
1873 | if (type > SD_DIF_TYPE3_PROTECTION) |
1874 | ret = -ENODEV; | |
1875 | else if (scsi_host_dif_capable(sdp->host, type)) | |
1876 | ret = 1; | |
1877 | ||
1878 | if (sdkp->first_scan || type != sdkp->protection_type) | |
1879 | switch (ret) { | |
1880 | case -ENODEV: | |
1881 | sd_printk(KERN_ERR, sdkp, "formatted with unsupported" \ | |
1882 | " protection type %u. Disabling disk!\n", | |
1883 | type); | |
1884 | break; | |
1885 | case 1: | |
1886 | sd_printk(KERN_NOTICE, sdkp, | |
1887 | "Enabling DIF Type %u protection\n", type); | |
1888 | break; | |
1889 | case 0: | |
1890 | sd_printk(KERN_NOTICE, sdkp, | |
1891 | "Disabling DIF Type %u protection\n", type); | |
1892 | break; | |
1893 | } | |
e0597d70 | 1894 | |
be922f47 MP |
1895 | sdkp->protection_type = type; |
1896 | ||
fe542396 | 1897 | return ret; |
e0597d70 MP |
1898 | } |
1899 | ||
0da205e0 MW |
1900 | static void read_capacity_error(struct scsi_disk *sdkp, struct scsi_device *sdp, |
1901 | struct scsi_sense_hdr *sshdr, int sense_valid, | |
1902 | int the_result) | |
1903 | { | |
1904 | sd_print_result(sdkp, the_result); | |
1905 | if (driver_byte(the_result) & DRIVER_SENSE) | |
1906 | sd_print_sense_hdr(sdkp, sshdr); | |
1907 | else | |
1908 | sd_printk(KERN_NOTICE, sdkp, "Sense not available.\n"); | |
1909 | ||
1910 | /* | |
1911 | * Set dirty bit for removable devices if not ready - | |
1912 | * sometimes drives will not report this properly. | |
1913 | */ | |
1914 | if (sdp->removable && | |
1915 | sense_valid && sshdr->sense_key == NOT_READY) | |
2bae0093 | 1916 | set_media_not_present(sdkp); |
0da205e0 MW |
1917 | |
1918 | /* | |
1919 | * We used to set media_present to 0 here to indicate no media | |
1920 | * in the drive, but some drives fail read capacity even with | |
1921 | * media present, so we can't do that. | |
1922 | */ | |
1923 | sdkp->capacity = 0; /* unknown mapped to zero - as usual */ | |
1924 | } | |
1925 | ||
1926 | #define RC16_LEN 32 | |
1927 | #if RC16_LEN > SD_BUF_SIZE | |
1928 | #error RC16_LEN must not be more than SD_BUF_SIZE | |
1929 | #endif | |
1930 | ||
3233ac19 JB |
1931 | #define READ_CAPACITY_RETRIES_ON_RESET 10 |
1932 | ||
0da205e0 MW |
1933 | static int read_capacity_16(struct scsi_disk *sdkp, struct scsi_device *sdp, |
1934 | unsigned char *buffer) | |
ea73a9f2 | 1935 | { |
1da177e4 | 1936 | unsigned char cmd[16]; |
1da177e4 LT |
1937 | struct scsi_sense_hdr sshdr; |
1938 | int sense_valid = 0; | |
0da205e0 | 1939 | int the_result; |
3233ac19 | 1940 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
ea09bcc9 | 1941 | unsigned int alignment; |
0da205e0 MW |
1942 | unsigned long long lba; |
1943 | unsigned sector_size; | |
1da177e4 | 1944 | |
5ce524bd HG |
1945 | if (sdp->no_read_capacity_16) |
1946 | return -EINVAL; | |
1947 | ||
1da177e4 | 1948 | do { |
0da205e0 MW |
1949 | memset(cmd, 0, 16); |
1950 | cmd[0] = SERVICE_ACTION_IN; | |
1951 | cmd[1] = SAI_READ_CAPACITY_16; | |
1952 | cmd[13] = RC16_LEN; | |
1953 | memset(buffer, 0, RC16_LEN); | |
1954 | ||
ea73a9f2 | 1955 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, |
0da205e0 MW |
1956 | buffer, RC16_LEN, &sshdr, |
1957 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
1da177e4 | 1958 | |
ea73a9f2 | 1959 | if (media_not_present(sdkp, &sshdr)) |
0da205e0 | 1960 | return -ENODEV; |
1da177e4 | 1961 | |
2b301307 | 1962 | if (the_result) { |
ea73a9f2 | 1963 | sense_valid = scsi_sense_valid(&sshdr); |
2b301307 MW |
1964 | if (sense_valid && |
1965 | sshdr.sense_key == ILLEGAL_REQUEST && | |
1966 | (sshdr.asc == 0x20 || sshdr.asc == 0x24) && | |
1967 | sshdr.ascq == 0x00) | |
1968 | /* Invalid Command Operation Code or | |
1969 | * Invalid Field in CDB, just retry | |
1970 | * silently with RC10 */ | |
1971 | return -EINVAL; | |
3233ac19 JB |
1972 | if (sense_valid && |
1973 | sshdr.sense_key == UNIT_ATTENTION && | |
1974 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) | |
1975 | /* Device reset might occur several times, | |
1976 | * give it one more chance */ | |
1977 | if (--reset_retries > 0) | |
1978 | continue; | |
2b301307 | 1979 | } |
1da177e4 LT |
1980 | retries--; |
1981 | ||
1982 | } while (the_result && retries); | |
1983 | ||
0da205e0 | 1984 | if (the_result) { |
e73aec82 | 1985 | sd_printk(KERN_NOTICE, sdkp, "READ CAPACITY(16) failed\n"); |
0da205e0 MW |
1986 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); |
1987 | return -EINVAL; | |
1988 | } | |
e73aec82 | 1989 | |
8f76d151 DH |
1990 | sector_size = get_unaligned_be32(&buffer[8]); |
1991 | lba = get_unaligned_be64(&buffer[0]); | |
0da205e0 | 1992 | |
fe542396 MP |
1993 | if (sd_read_protection_type(sdkp, buffer) < 0) { |
1994 | sdkp->capacity = 0; | |
1995 | return -ENODEV; | |
1996 | } | |
0da205e0 MW |
1997 | |
1998 | if ((sizeof(sdkp->capacity) == 4) && (lba >= 0xffffffffULL)) { | |
1999 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a " | |
2000 | "kernel compiled with support for large block " | |
2001 | "devices.\n"); | |
2002 | sdkp->capacity = 0; | |
2003 | return -EOVERFLOW; | |
2004 | } | |
2005 | ||
ea09bcc9 | 2006 | /* Logical blocks per physical block exponent */ |
526f7c79 | 2007 | sdkp->physical_block_size = (1 << (buffer[13] & 0xf)) * sector_size; |
ea09bcc9 MP |
2008 | |
2009 | /* Lowest aligned logical block */ | |
2010 | alignment = ((buffer[14] & 0x3f) << 8 | buffer[15]) * sector_size; | |
2011 | blk_queue_alignment_offset(sdp->request_queue, alignment); | |
2012 | if (alignment && sdkp->first_scan) | |
2013 | sd_printk(KERN_NOTICE, sdkp, | |
2014 | "physical block alignment offset: %u\n", alignment); | |
2015 | ||
c98a0eb0 MP |
2016 | if (buffer[14] & 0x80) { /* LBPME */ |
2017 | sdkp->lbpme = 1; | |
e339c1a7 | 2018 | |
c98a0eb0 MP |
2019 | if (buffer[14] & 0x40) /* LBPRZ */ |
2020 | sdkp->lbprz = 1; | |
e339c1a7 | 2021 | |
c98a0eb0 | 2022 | sd_config_discard(sdkp, SD_LBP_WS16); |
e339c1a7 MP |
2023 | } |
2024 | ||
0da205e0 MW |
2025 | sdkp->capacity = lba + 1; |
2026 | return sector_size; | |
2027 | } | |
2028 | ||
2029 | static int read_capacity_10(struct scsi_disk *sdkp, struct scsi_device *sdp, | |
2030 | unsigned char *buffer) | |
2031 | { | |
2032 | unsigned char cmd[16]; | |
2033 | struct scsi_sense_hdr sshdr; | |
2034 | int sense_valid = 0; | |
2035 | int the_result; | |
3233ac19 | 2036 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
0da205e0 MW |
2037 | sector_t lba; |
2038 | unsigned sector_size; | |
2039 | ||
2040 | do { | |
2041 | cmd[0] = READ_CAPACITY; | |
2042 | memset(&cmd[1], 0, 9); | |
2043 | memset(buffer, 0, 8); | |
2044 | ||
2045 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, | |
2046 | buffer, 8, &sshdr, | |
2047 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
2048 | ||
2049 | if (media_not_present(sdkp, &sshdr)) | |
2050 | return -ENODEV; | |
2051 | ||
3233ac19 | 2052 | if (the_result) { |
0da205e0 | 2053 | sense_valid = scsi_sense_valid(&sshdr); |
3233ac19 JB |
2054 | if (sense_valid && |
2055 | sshdr.sense_key == UNIT_ATTENTION && | |
2056 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) | |
2057 | /* Device reset might occur several times, | |
2058 | * give it one more chance */ | |
2059 | if (--reset_retries > 0) | |
2060 | continue; | |
2061 | } | |
0da205e0 MW |
2062 | retries--; |
2063 | ||
2064 | } while (the_result && retries); | |
2065 | ||
2066 | if (the_result) { | |
2067 | sd_printk(KERN_NOTICE, sdkp, "READ CAPACITY failed\n"); | |
2068 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); | |
2069 | return -EINVAL; | |
2070 | } | |
2071 | ||
8f76d151 DH |
2072 | sector_size = get_unaligned_be32(&buffer[4]); |
2073 | lba = get_unaligned_be32(&buffer[0]); | |
0da205e0 | 2074 | |
5ce524bd HG |
2075 | if (sdp->no_read_capacity_16 && (lba == 0xffffffff)) { |
2076 | /* Some buggy (usb cardreader) devices return an lba of | |
2077 | 0xffffffff when the want to report a size of 0 (with | |
2078 | which they really mean no media is present) */ | |
2079 | sdkp->capacity = 0; | |
5cc10350 | 2080 | sdkp->physical_block_size = sector_size; |
5ce524bd HG |
2081 | return sector_size; |
2082 | } | |
2083 | ||
0da205e0 MW |
2084 | if ((sizeof(sdkp->capacity) == 4) && (lba == 0xffffffff)) { |
2085 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a " | |
2086 | "kernel compiled with support for large block " | |
2087 | "devices.\n"); | |
2088 | sdkp->capacity = 0; | |
2089 | return -EOVERFLOW; | |
2090 | } | |
2091 | ||
2092 | sdkp->capacity = lba + 1; | |
526f7c79 | 2093 | sdkp->physical_block_size = sector_size; |
0da205e0 MW |
2094 | return sector_size; |
2095 | } | |
2096 | ||
2b301307 MW |
2097 | static int sd_try_rc16_first(struct scsi_device *sdp) |
2098 | { | |
f87146bb HR |
2099 | if (sdp->host->max_cmd_len < 16) |
2100 | return 0; | |
6a0bdffa AS |
2101 | if (sdp->try_rc_10_first) |
2102 | return 0; | |
2b301307 MW |
2103 | if (sdp->scsi_level > SCSI_SPC_2) |
2104 | return 1; | |
2105 | if (scsi_device_protection(sdp)) | |
2106 | return 1; | |
2107 | return 0; | |
2108 | } | |
2109 | ||
0da205e0 MW |
2110 | /* |
2111 | * read disk capacity | |
2112 | */ | |
2113 | static void | |
2114 | sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer) | |
2115 | { | |
2116 | int sector_size; | |
2117 | struct scsi_device *sdp = sdkp->device; | |
70a9b873 | 2118 | sector_t old_capacity = sdkp->capacity; |
0da205e0 | 2119 | |
2b301307 | 2120 | if (sd_try_rc16_first(sdp)) { |
0da205e0 MW |
2121 | sector_size = read_capacity_16(sdkp, sdp, buffer); |
2122 | if (sector_size == -EOVERFLOW) | |
1da177e4 | 2123 | goto got_data; |
2b301307 MW |
2124 | if (sector_size == -ENODEV) |
2125 | return; | |
2126 | if (sector_size < 0) | |
2127 | sector_size = read_capacity_10(sdkp, sdp, buffer); | |
0da205e0 MW |
2128 | if (sector_size < 0) |
2129 | return; | |
1da177e4 | 2130 | } else { |
0da205e0 MW |
2131 | sector_size = read_capacity_10(sdkp, sdp, buffer); |
2132 | if (sector_size == -EOVERFLOW) | |
2133 | goto got_data; | |
2134 | if (sector_size < 0) | |
2135 | return; | |
2136 | if ((sizeof(sdkp->capacity) > 4) && | |
2137 | (sdkp->capacity > 0xffffffffULL)) { | |
2138 | int old_sector_size = sector_size; | |
2139 | sd_printk(KERN_NOTICE, sdkp, "Very big device. " | |
2140 | "Trying to use READ CAPACITY(16).\n"); | |
2141 | sector_size = read_capacity_16(sdkp, sdp, buffer); | |
2142 | if (sector_size < 0) { | |
2143 | sd_printk(KERN_NOTICE, sdkp, | |
2144 | "Using 0xffffffff as device size\n"); | |
2145 | sdkp->capacity = 1 + (sector_t) 0xffffffff; | |
2146 | sector_size = old_sector_size; | |
2147 | goto got_data; | |
2148 | } | |
2149 | } | |
2150 | } | |
1da177e4 | 2151 | |
5c211caa AS |
2152 | /* Some devices are known to return the total number of blocks, |
2153 | * not the highest block number. Some devices have versions | |
2154 | * which do this and others which do not. Some devices we might | |
2155 | * suspect of doing this but we don't know for certain. | |
2156 | * | |
2157 | * If we know the reported capacity is wrong, decrement it. If | |
2158 | * we can only guess, then assume the number of blocks is even | |
2159 | * (usually true but not always) and err on the side of lowering | |
2160 | * the capacity. | |
2161 | */ | |
2162 | if (sdp->fix_capacity || | |
2163 | (sdp->guess_capacity && (sdkp->capacity & 0x01))) { | |
2164 | sd_printk(KERN_INFO, sdkp, "Adjusting the sector count " | |
2165 | "from its reported value: %llu\n", | |
2166 | (unsigned long long) sdkp->capacity); | |
1da177e4 | 2167 | --sdkp->capacity; |
61bf54b7 ON |
2168 | } |
2169 | ||
1da177e4 LT |
2170 | got_data: |
2171 | if (sector_size == 0) { | |
2172 | sector_size = 512; | |
e73aec82 MP |
2173 | sd_printk(KERN_NOTICE, sdkp, "Sector size 0 reported, " |
2174 | "assuming 512.\n"); | |
1da177e4 LT |
2175 | } |
2176 | ||
2177 | if (sector_size != 512 && | |
2178 | sector_size != 1024 && | |
2179 | sector_size != 2048 && | |
2180 | sector_size != 4096 && | |
2181 | sector_size != 256) { | |
e73aec82 MP |
2182 | sd_printk(KERN_NOTICE, sdkp, "Unsupported sector size %d.\n", |
2183 | sector_size); | |
1da177e4 LT |
2184 | /* |
2185 | * The user might want to re-format the drive with | |
2186 | * a supported sectorsize. Once this happens, it | |
2187 | * would be relatively trivial to set the thing up. | |
2188 | * For this reason, we leave the thing in the table. | |
2189 | */ | |
2190 | sdkp->capacity = 0; | |
2191 | /* | |
2192 | * set a bogus sector size so the normal read/write | |
2193 | * logic in the block layer will eventually refuse any | |
2194 | * request on this device without tripping over power | |
2195 | * of two sector size assumptions | |
2196 | */ | |
2197 | sector_size = 512; | |
2198 | } | |
e1defc4f | 2199 | blk_queue_logical_block_size(sdp->request_queue, sector_size); |
7404ad3b | 2200 | |
1da177e4 | 2201 | { |
7404ad3b | 2202 | char cap_str_2[10], cap_str_10[10]; |
520a2c27 | 2203 | u64 sz = (u64)sdkp->capacity << ilog2(sector_size); |
1da177e4 | 2204 | |
7404ad3b JB |
2205 | string_get_size(sz, STRING_UNITS_2, cap_str_2, |
2206 | sizeof(cap_str_2)); | |
2207 | string_get_size(sz, STRING_UNITS_10, cap_str_10, | |
2208 | sizeof(cap_str_10)); | |
1da177e4 | 2209 | |
ea09bcc9 | 2210 | if (sdkp->first_scan || old_capacity != sdkp->capacity) { |
70a9b873 | 2211 | sd_printk(KERN_NOTICE, sdkp, |
ea09bcc9 | 2212 | "%llu %d-byte logical blocks: (%s/%s)\n", |
70a9b873 MP |
2213 | (unsigned long long)sdkp->capacity, |
2214 | sector_size, cap_str_10, cap_str_2); | |
ea09bcc9 | 2215 | |
526f7c79 | 2216 | if (sdkp->physical_block_size != sector_size) |
ea09bcc9 MP |
2217 | sd_printk(KERN_NOTICE, sdkp, |
2218 | "%u-byte physical blocks\n", | |
526f7c79 | 2219 | sdkp->physical_block_size); |
ea09bcc9 | 2220 | } |
1da177e4 LT |
2221 | } |
2222 | ||
53ad570b JH |
2223 | sdp->use_16_for_rw = (sdkp->capacity > 0xffffffff); |
2224 | ||
1da177e4 LT |
2225 | /* Rescale capacity to 512-byte units */ |
2226 | if (sector_size == 4096) | |
2227 | sdkp->capacity <<= 3; | |
2228 | else if (sector_size == 2048) | |
2229 | sdkp->capacity <<= 2; | |
2230 | else if (sector_size == 1024) | |
2231 | sdkp->capacity <<= 1; | |
2232 | else if (sector_size == 256) | |
2233 | sdkp->capacity >>= 1; | |
2234 | ||
526f7c79 MP |
2235 | blk_queue_physical_block_size(sdp->request_queue, |
2236 | sdkp->physical_block_size); | |
1da177e4 LT |
2237 | sdkp->device->sector_size = sector_size; |
2238 | } | |
2239 | ||
2240 | /* called with buffer of length 512 */ | |
2241 | static inline int | |
ea73a9f2 JB |
2242 | sd_do_mode_sense(struct scsi_device *sdp, int dbd, int modepage, |
2243 | unsigned char *buffer, int len, struct scsi_mode_data *data, | |
2244 | struct scsi_sense_hdr *sshdr) | |
1da177e4 | 2245 | { |
ea73a9f2 | 2246 | return scsi_mode_sense(sdp, dbd, modepage, buffer, len, |
1cf72699 | 2247 | SD_TIMEOUT, SD_MAX_RETRIES, data, |
ea73a9f2 | 2248 | sshdr); |
1da177e4 LT |
2249 | } |
2250 | ||
2251 | /* | |
2252 | * read write protect setting, if possible - called only in sd_revalidate_disk() | |
48970800 | 2253 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
2254 | */ |
2255 | static void | |
e73aec82 | 2256 | sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer) |
ea73a9f2 | 2257 | { |
1da177e4 | 2258 | int res; |
ea73a9f2 | 2259 | struct scsi_device *sdp = sdkp->device; |
1da177e4 | 2260 | struct scsi_mode_data data; |
70a9b873 | 2261 | int old_wp = sdkp->write_prot; |
1da177e4 LT |
2262 | |
2263 | set_disk_ro(sdkp->disk, 0); | |
ea73a9f2 | 2264 | if (sdp->skip_ms_page_3f) { |
e73aec82 | 2265 | sd_printk(KERN_NOTICE, sdkp, "Assuming Write Enabled\n"); |
1da177e4 LT |
2266 | return; |
2267 | } | |
2268 | ||
ea73a9f2 JB |
2269 | if (sdp->use_192_bytes_for_3f) { |
2270 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 192, &data, NULL); | |
1da177e4 LT |
2271 | } else { |
2272 | /* | |
2273 | * First attempt: ask for all pages (0x3F), but only 4 bytes. | |
2274 | * We have to start carefully: some devices hang if we ask | |
2275 | * for more than is available. | |
2276 | */ | |
ea73a9f2 | 2277 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 4, &data, NULL); |
1da177e4 LT |
2278 | |
2279 | /* | |
2280 | * Second attempt: ask for page 0 When only page 0 is | |
2281 | * implemented, a request for page 3F may return Sense Key | |
2282 | * 5: Illegal Request, Sense Code 24: Invalid field in | |
2283 | * CDB. | |
2284 | */ | |
2285 | if (!scsi_status_is_good(res)) | |
ea73a9f2 | 2286 | res = sd_do_mode_sense(sdp, 0, 0, buffer, 4, &data, NULL); |
1da177e4 LT |
2287 | |
2288 | /* | |
2289 | * Third attempt: ask 255 bytes, as we did earlier. | |
2290 | */ | |
2291 | if (!scsi_status_is_good(res)) | |
ea73a9f2 JB |
2292 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 255, |
2293 | &data, NULL); | |
1da177e4 LT |
2294 | } |
2295 | ||
2296 | if (!scsi_status_is_good(res)) { | |
e73aec82 MP |
2297 | sd_printk(KERN_WARNING, sdkp, |
2298 | "Test WP failed, assume Write Enabled\n"); | |
1da177e4 LT |
2299 | } else { |
2300 | sdkp->write_prot = ((data.device_specific & 0x80) != 0); | |
2301 | set_disk_ro(sdkp->disk, sdkp->write_prot); | |
70a9b873 MP |
2302 | if (sdkp->first_scan || old_wp != sdkp->write_prot) { |
2303 | sd_printk(KERN_NOTICE, sdkp, "Write Protect is %s\n", | |
2304 | sdkp->write_prot ? "on" : "off"); | |
2305 | sd_printk(KERN_DEBUG, sdkp, | |
2306 | "Mode Sense: %02x %02x %02x %02x\n", | |
2307 | buffer[0], buffer[1], buffer[2], buffer[3]); | |
2308 | } | |
1da177e4 LT |
2309 | } |
2310 | } | |
2311 | ||
2312 | /* | |
2313 | * sd_read_cache_type - called only from sd_revalidate_disk() | |
48970800 | 2314 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
2315 | */ |
2316 | static void | |
e73aec82 | 2317 | sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer) |
631e8a13 | 2318 | { |
1da177e4 | 2319 | int len = 0, res; |
ea73a9f2 | 2320 | struct scsi_device *sdp = sdkp->device; |
1da177e4 | 2321 | |
631e8a13 AV |
2322 | int dbd; |
2323 | int modepage; | |
0bcaa111 | 2324 | int first_len; |
1da177e4 LT |
2325 | struct scsi_mode_data data; |
2326 | struct scsi_sense_hdr sshdr; | |
70a9b873 MP |
2327 | int old_wce = sdkp->WCE; |
2328 | int old_rcd = sdkp->RCD; | |
2329 | int old_dpofua = sdkp->DPOFUA; | |
1da177e4 | 2330 | |
39c60a09 JB |
2331 | |
2332 | if (sdkp->cache_override) | |
2333 | return; | |
2334 | ||
0bcaa111 LT |
2335 | first_len = 4; |
2336 | if (sdp->skip_ms_page_8) { | |
2337 | if (sdp->type == TYPE_RBC) | |
2338 | goto defaults; | |
2339 | else { | |
2340 | if (sdp->skip_ms_page_3f) | |
2341 | goto defaults; | |
2342 | modepage = 0x3F; | |
2343 | if (sdp->use_192_bytes_for_3f) | |
2344 | first_len = 192; | |
2345 | dbd = 0; | |
2346 | } | |
2347 | } else if (sdp->type == TYPE_RBC) { | |
631e8a13 AV |
2348 | modepage = 6; |
2349 | dbd = 8; | |
2350 | } else { | |
2351 | modepage = 8; | |
2352 | dbd = 0; | |
2353 | } | |
2354 | ||
1da177e4 | 2355 | /* cautiously ask */ |
0bcaa111 LT |
2356 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, first_len, |
2357 | &data, &sshdr); | |
1da177e4 LT |
2358 | |
2359 | if (!scsi_status_is_good(res)) | |
2360 | goto bad_sense; | |
2361 | ||
6d73c851 AV |
2362 | if (!data.header_length) { |
2363 | modepage = 6; | |
0bcaa111 | 2364 | first_len = 0; |
e73aec82 | 2365 | sd_printk(KERN_ERR, sdkp, "Missing header in MODE_SENSE response\n"); |
6d73c851 AV |
2366 | } |
2367 | ||
1da177e4 LT |
2368 | /* that went OK, now ask for the proper length */ |
2369 | len = data.length; | |
2370 | ||
2371 | /* | |
2372 | * We're only interested in the first three bytes, actually. | |
2373 | * But the data cache page is defined for the first 20. | |
2374 | */ | |
2375 | if (len < 3) | |
2376 | goto bad_sense; | |
0bcaa111 LT |
2377 | else if (len > SD_BUF_SIZE) { |
2378 | sd_printk(KERN_NOTICE, sdkp, "Truncating mode parameter " | |
2379 | "data from %d to %d bytes\n", len, SD_BUF_SIZE); | |
2380 | len = SD_BUF_SIZE; | |
2381 | } | |
2382 | if (modepage == 0x3F && sdp->use_192_bytes_for_3f) | |
2383 | len = 192; | |
1da177e4 LT |
2384 | |
2385 | /* Get the data */ | |
0bcaa111 LT |
2386 | if (len > first_len) |
2387 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, len, | |
2388 | &data, &sshdr); | |
1da177e4 LT |
2389 | |
2390 | if (scsi_status_is_good(res)) { | |
631e8a13 | 2391 | int offset = data.header_length + data.block_descriptor_length; |
1da177e4 | 2392 | |
0bcaa111 LT |
2393 | while (offset < len) { |
2394 | u8 page_code = buffer[offset] & 0x3F; | |
2395 | u8 spf = buffer[offset] & 0x40; | |
2396 | ||
2397 | if (page_code == 8 || page_code == 6) { | |
2398 | /* We're interested only in the first 3 bytes. | |
2399 | */ | |
2400 | if (len - offset <= 2) { | |
2401 | sd_printk(KERN_ERR, sdkp, "Incomplete " | |
2402 | "mode parameter data\n"); | |
2403 | goto defaults; | |
2404 | } else { | |
2405 | modepage = page_code; | |
2406 | goto Page_found; | |
2407 | } | |
2408 | } else { | |
2409 | /* Go to the next page */ | |
2410 | if (spf && len - offset > 3) | |
2411 | offset += 4 + (buffer[offset+2] << 8) + | |
2412 | buffer[offset+3]; | |
2413 | else if (!spf && len - offset > 1) | |
2414 | offset += 2 + buffer[offset+1]; | |
2415 | else { | |
2416 | sd_printk(KERN_ERR, sdkp, "Incomplete " | |
2417 | "mode parameter data\n"); | |
2418 | goto defaults; | |
2419 | } | |
2420 | } | |
48970800 AV |
2421 | } |
2422 | ||
984f1733 AS |
2423 | sd_printk(KERN_ERR, sdkp, "No Caching mode page found\n"); |
2424 | goto defaults; | |
2425 | ||
0bcaa111 | 2426 | Page_found: |
631e8a13 AV |
2427 | if (modepage == 8) { |
2428 | sdkp->WCE = ((buffer[offset + 2] & 0x04) != 0); | |
2429 | sdkp->RCD = ((buffer[offset + 2] & 0x01) != 0); | |
2430 | } else { | |
2431 | sdkp->WCE = ((buffer[offset + 2] & 0x01) == 0); | |
2432 | sdkp->RCD = 0; | |
2433 | } | |
1da177e4 | 2434 | |
007365ad TH |
2435 | sdkp->DPOFUA = (data.device_specific & 0x10) != 0; |
2436 | if (sdkp->DPOFUA && !sdkp->device->use_10_for_rw) { | |
e73aec82 MP |
2437 | sd_printk(KERN_NOTICE, sdkp, |
2438 | "Uses READ/WRITE(6), disabling FUA\n"); | |
007365ad TH |
2439 | sdkp->DPOFUA = 0; |
2440 | } | |
2441 | ||
70a9b873 MP |
2442 | if (sdkp->first_scan || old_wce != sdkp->WCE || |
2443 | old_rcd != sdkp->RCD || old_dpofua != sdkp->DPOFUA) | |
2444 | sd_printk(KERN_NOTICE, sdkp, | |
2445 | "Write cache: %s, read cache: %s, %s\n", | |
2446 | sdkp->WCE ? "enabled" : "disabled", | |
2447 | sdkp->RCD ? "disabled" : "enabled", | |
2448 | sdkp->DPOFUA ? "supports DPO and FUA" | |
2449 | : "doesn't support DPO or FUA"); | |
1da177e4 LT |
2450 | |
2451 | return; | |
2452 | } | |
2453 | ||
2454 | bad_sense: | |
ea73a9f2 | 2455 | if (scsi_sense_valid(&sshdr) && |
1da177e4 LT |
2456 | sshdr.sense_key == ILLEGAL_REQUEST && |
2457 | sshdr.asc == 0x24 && sshdr.ascq == 0x0) | |
e73aec82 MP |
2458 | /* Invalid field in CDB */ |
2459 | sd_printk(KERN_NOTICE, sdkp, "Cache data unavailable\n"); | |
1da177e4 | 2460 | else |
e73aec82 | 2461 | sd_printk(KERN_ERR, sdkp, "Asking for cache data failed\n"); |
1da177e4 LT |
2462 | |
2463 | defaults: | |
b81478d8 NJ |
2464 | if (sdp->wce_default_on) { |
2465 | sd_printk(KERN_NOTICE, sdkp, "Assuming drive cache: write back\n"); | |
2466 | sdkp->WCE = 1; | |
2467 | } else { | |
2468 | sd_printk(KERN_ERR, sdkp, "Assuming drive cache: write through\n"); | |
2469 | sdkp->WCE = 0; | |
2470 | } | |
1da177e4 | 2471 | sdkp->RCD = 0; |
48970800 | 2472 | sdkp->DPOFUA = 0; |
1da177e4 LT |
2473 | } |
2474 | ||
e0597d70 MP |
2475 | /* |
2476 | * The ATO bit indicates whether the DIF application tag is available | |
2477 | * for use by the operating system. | |
2478 | */ | |
439d77f7 | 2479 | static void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer) |
e0597d70 MP |
2480 | { |
2481 | int res, offset; | |
2482 | struct scsi_device *sdp = sdkp->device; | |
2483 | struct scsi_mode_data data; | |
2484 | struct scsi_sense_hdr sshdr; | |
2485 | ||
2486 | if (sdp->type != TYPE_DISK) | |
2487 | return; | |
2488 | ||
2489 | if (sdkp->protection_type == 0) | |
2490 | return; | |
2491 | ||
2492 | res = scsi_mode_sense(sdp, 1, 0x0a, buffer, 36, SD_TIMEOUT, | |
2493 | SD_MAX_RETRIES, &data, &sshdr); | |
2494 | ||
2495 | if (!scsi_status_is_good(res) || !data.header_length || | |
2496 | data.length < 6) { | |
2497 | sd_printk(KERN_WARNING, sdkp, | |
2498 | "getting Control mode page failed, assume no ATO\n"); | |
2499 | ||
2500 | if (scsi_sense_valid(&sshdr)) | |
2501 | sd_print_sense_hdr(sdkp, &sshdr); | |
2502 | ||
2503 | return; | |
2504 | } | |
2505 | ||
2506 | offset = data.header_length + data.block_descriptor_length; | |
2507 | ||
2508 | if ((buffer[offset] & 0x3f) != 0x0a) { | |
2509 | sd_printk(KERN_ERR, sdkp, "ATO Got wrong page\n"); | |
2510 | return; | |
2511 | } | |
2512 | ||
2513 | if ((buffer[offset + 5] & 0x80) == 0) | |
2514 | return; | |
2515 | ||
2516 | sdkp->ATO = 1; | |
2517 | ||
2518 | return; | |
2519 | } | |
2520 | ||
d11b6916 MP |
2521 | /** |
2522 | * sd_read_block_limits - Query disk device for preferred I/O sizes. | |
2523 | * @disk: disk to query | |
2524 | */ | |
2525 | static void sd_read_block_limits(struct scsi_disk *sdkp) | |
2526 | { | |
2527 | unsigned int sector_sz = sdkp->device->sector_size; | |
bb2d3de1 | 2528 | const int vpd_len = 64; |
e3deec09 | 2529 | unsigned char *buffer = kmalloc(vpd_len, GFP_KERNEL); |
d11b6916 | 2530 | |
e3deec09 JB |
2531 | if (!buffer || |
2532 | /* Block Limits VPD */ | |
2533 | scsi_get_vpd_page(sdkp->device, 0xb0, buffer, vpd_len)) | |
2534 | goto out; | |
d11b6916 MP |
2535 | |
2536 | blk_queue_io_min(sdkp->disk->queue, | |
2537 | get_unaligned_be16(&buffer[6]) * sector_sz); | |
2538 | blk_queue_io_opt(sdkp->disk->queue, | |
2539 | get_unaligned_be32(&buffer[12]) * sector_sz); | |
2540 | ||
c98a0eb0 MP |
2541 | if (buffer[3] == 0x3c) { |
2542 | unsigned int lba_count, desc_count; | |
e339c1a7 | 2543 | |
5db44863 | 2544 | sdkp->max_ws_blocks = (u32)get_unaligned_be64(&buffer[36]); |
e339c1a7 | 2545 | |
c98a0eb0 | 2546 | if (!sdkp->lbpme) |
045d3fe7 | 2547 | goto out; |
045d3fe7 | 2548 | |
c98a0eb0 MP |
2549 | lba_count = get_unaligned_be32(&buffer[20]); |
2550 | desc_count = get_unaligned_be32(&buffer[24]); | |
045d3fe7 | 2551 | |
c98a0eb0 MP |
2552 | if (lba_count && desc_count) |
2553 | sdkp->max_unmap_blocks = lba_count; | |
e339c1a7 | 2554 | |
c98a0eb0 | 2555 | sdkp->unmap_granularity = get_unaligned_be32(&buffer[28]); |
e339c1a7 MP |
2556 | |
2557 | if (buffer[32] & 0x80) | |
c98a0eb0 | 2558 | sdkp->unmap_alignment = |
e339c1a7 | 2559 | get_unaligned_be32(&buffer[32]) & ~(1 << 31); |
c98a0eb0 MP |
2560 | |
2561 | if (!sdkp->lbpvpd) { /* LBP VPD page not provided */ | |
2562 | ||
2563 | if (sdkp->max_unmap_blocks) | |
2564 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
2565 | else | |
2566 | sd_config_discard(sdkp, SD_LBP_WS16); | |
2567 | ||
2568 | } else { /* LBP VPD page tells us what to use */ | |
2569 | ||
2570 | if (sdkp->lbpu && sdkp->max_unmap_blocks) | |
2571 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
2572 | else if (sdkp->lbpws) | |
2573 | sd_config_discard(sdkp, SD_LBP_WS16); | |
2574 | else if (sdkp->lbpws10) | |
2575 | sd_config_discard(sdkp, SD_LBP_WS10); | |
2576 | else | |
2577 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
2578 | } | |
e339c1a7 MP |
2579 | } |
2580 | ||
e3deec09 | 2581 | out: |
d11b6916 MP |
2582 | kfree(buffer); |
2583 | } | |
2584 | ||
3821d768 MP |
2585 | /** |
2586 | * sd_read_block_characteristics - Query block dev. characteristics | |
2587 | * @disk: disk to query | |
2588 | */ | |
2589 | static void sd_read_block_characteristics(struct scsi_disk *sdkp) | |
2590 | { | |
e3deec09 | 2591 | unsigned char *buffer; |
3821d768 | 2592 | u16 rot; |
bb2d3de1 | 2593 | const int vpd_len = 64; |
3821d768 | 2594 | |
e3deec09 | 2595 | buffer = kmalloc(vpd_len, GFP_KERNEL); |
3821d768 | 2596 | |
e3deec09 JB |
2597 | if (!buffer || |
2598 | /* Block Device Characteristics VPD */ | |
2599 | scsi_get_vpd_page(sdkp->device, 0xb1, buffer, vpd_len)) | |
2600 | goto out; | |
3821d768 MP |
2601 | |
2602 | rot = get_unaligned_be16(&buffer[4]); | |
2603 | ||
2604 | if (rot == 1) | |
2605 | queue_flag_set_unlocked(QUEUE_FLAG_NONROT, sdkp->disk->queue); | |
2606 | ||
e3deec09 | 2607 | out: |
3821d768 MP |
2608 | kfree(buffer); |
2609 | } | |
2610 | ||
045d3fe7 | 2611 | /** |
c98a0eb0 | 2612 | * sd_read_block_provisioning - Query provisioning VPD page |
045d3fe7 MP |
2613 | * @disk: disk to query |
2614 | */ | |
c98a0eb0 | 2615 | static void sd_read_block_provisioning(struct scsi_disk *sdkp) |
045d3fe7 MP |
2616 | { |
2617 | unsigned char *buffer; | |
2618 | const int vpd_len = 8; | |
2619 | ||
c98a0eb0 | 2620 | if (sdkp->lbpme == 0) |
045d3fe7 MP |
2621 | return; |
2622 | ||
2623 | buffer = kmalloc(vpd_len, GFP_KERNEL); | |
2624 | ||
2625 | if (!buffer || scsi_get_vpd_page(sdkp->device, 0xb2, buffer, vpd_len)) | |
2626 | goto out; | |
2627 | ||
c98a0eb0 MP |
2628 | sdkp->lbpvpd = 1; |
2629 | sdkp->lbpu = (buffer[5] >> 7) & 1; /* UNMAP */ | |
2630 | sdkp->lbpws = (buffer[5] >> 6) & 1; /* WRITE SAME(16) with UNMAP */ | |
2631 | sdkp->lbpws10 = (buffer[5] >> 5) & 1; /* WRITE SAME(10) with UNMAP */ | |
045d3fe7 MP |
2632 | |
2633 | out: | |
2634 | kfree(buffer); | |
2635 | } | |
2636 | ||
5db44863 MP |
2637 | static void sd_read_write_same(struct scsi_disk *sdkp, unsigned char *buffer) |
2638 | { | |
66c28f97 MP |
2639 | struct scsi_device *sdev = sdkp->device; |
2640 | ||
2641 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, INQUIRY) < 0) { | |
2642 | sdev->no_report_opcodes = 1; | |
2643 | ||
2644 | /* Disable WRITE SAME if REPORT SUPPORTED OPERATION | |
2645 | * CODES is unsupported and the device has an ATA | |
2646 | * Information VPD page (SAT). | |
2647 | */ | |
2648 | if (!scsi_get_vpd_page(sdev, 0x89, buffer, SD_BUF_SIZE)) | |
2649 | sdev->no_write_same = 1; | |
2650 | } | |
2651 | ||
2652 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME_16) == 1) | |
5db44863 | 2653 | sdkp->ws16 = 1; |
66c28f97 MP |
2654 | |
2655 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME) == 1) | |
2656 | sdkp->ws10 = 1; | |
5db44863 MP |
2657 | } |
2658 | ||
ffd4bc2a MP |
2659 | static int sd_try_extended_inquiry(struct scsi_device *sdp) |
2660 | { | |
2661 | /* | |
2662 | * Although VPD inquiries can go to SCSI-2 type devices, | |
2663 | * some USB ones crash on receiving them, and the pages | |
2664 | * we currently ask for are for SPC-3 and beyond | |
2665 | */ | |
09b6b51b | 2666 | if (sdp->scsi_level > SCSI_SPC_2 && !sdp->skip_vpd_pages) |
ffd4bc2a MP |
2667 | return 1; |
2668 | return 0; | |
2669 | } | |
2670 | ||
1da177e4 LT |
2671 | /** |
2672 | * sd_revalidate_disk - called the first time a new disk is seen, | |
2673 | * performs disk spin up, read_capacity, etc. | |
2674 | * @disk: struct gendisk we care about | |
2675 | **/ | |
2676 | static int sd_revalidate_disk(struct gendisk *disk) | |
2677 | { | |
2678 | struct scsi_disk *sdkp = scsi_disk(disk); | |
2679 | struct scsi_device *sdp = sdkp->device; | |
1da177e4 | 2680 | unsigned char *buffer; |
4913efe4 | 2681 | unsigned flush = 0; |
1da177e4 | 2682 | |
fa0d34be MP |
2683 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, |
2684 | "sd_revalidate_disk\n")); | |
1da177e4 LT |
2685 | |
2686 | /* | |
2687 | * If the device is offline, don't try and read capacity or any | |
2688 | * of the other niceties. | |
2689 | */ | |
2690 | if (!scsi_device_online(sdp)) | |
2691 | goto out; | |
2692 | ||
a6123f14 | 2693 | buffer = kmalloc(SD_BUF_SIZE, GFP_KERNEL); |
1da177e4 | 2694 | if (!buffer) { |
e73aec82 MP |
2695 | sd_printk(KERN_WARNING, sdkp, "sd_revalidate_disk: Memory " |
2696 | "allocation failure.\n"); | |
ea73a9f2 | 2697 | goto out; |
1da177e4 LT |
2698 | } |
2699 | ||
e73aec82 | 2700 | sd_spinup_disk(sdkp); |
1da177e4 LT |
2701 | |
2702 | /* | |
2703 | * Without media there is no reason to ask; moreover, some devices | |
2704 | * react badly if we do. | |
2705 | */ | |
2706 | if (sdkp->media_present) { | |
e73aec82 | 2707 | sd_read_capacity(sdkp, buffer); |
ffd4bc2a MP |
2708 | |
2709 | if (sd_try_extended_inquiry(sdp)) { | |
c98a0eb0 | 2710 | sd_read_block_provisioning(sdkp); |
ffd4bc2a MP |
2711 | sd_read_block_limits(sdkp); |
2712 | sd_read_block_characteristics(sdkp); | |
2713 | } | |
2714 | ||
e73aec82 MP |
2715 | sd_read_write_protect_flag(sdkp, buffer); |
2716 | sd_read_cache_type(sdkp, buffer); | |
e0597d70 | 2717 | sd_read_app_tag_own(sdkp, buffer); |
5db44863 | 2718 | sd_read_write_same(sdkp, buffer); |
1da177e4 | 2719 | } |
461d4e90 | 2720 | |
70a9b873 MP |
2721 | sdkp->first_scan = 0; |
2722 | ||
461d4e90 TH |
2723 | /* |
2724 | * We now have all cache related info, determine how we deal | |
4913efe4 | 2725 | * with flush requests. |
461d4e90 | 2726 | */ |
4913efe4 TH |
2727 | if (sdkp->WCE) { |
2728 | flush |= REQ_FLUSH; | |
2729 | if (sdkp->DPOFUA) | |
2730 | flush |= REQ_FUA; | |
2731 | } | |
461d4e90 | 2732 | |
4913efe4 | 2733 | blk_queue_flush(sdkp->disk->queue, flush); |
461d4e90 | 2734 | |
1da177e4 | 2735 | set_capacity(disk, sdkp->capacity); |
5db44863 | 2736 | sd_config_write_same(sdkp); |
1da177e4 LT |
2737 | kfree(buffer); |
2738 | ||
1da177e4 LT |
2739 | out: |
2740 | return 0; | |
2741 | } | |
2742 | ||
72ec24bd TH |
2743 | /** |
2744 | * sd_unlock_native_capacity - unlock native capacity | |
2745 | * @disk: struct gendisk to set capacity for | |
2746 | * | |
2747 | * Block layer calls this function if it detects that partitions | |
2748 | * on @disk reach beyond the end of the device. If the SCSI host | |
2749 | * implements ->unlock_native_capacity() method, it's invoked to | |
2750 | * give it a chance to adjust the device capacity. | |
2751 | * | |
2752 | * CONTEXT: | |
2753 | * Defined by block layer. Might sleep. | |
2754 | */ | |
2755 | static void sd_unlock_native_capacity(struct gendisk *disk) | |
2756 | { | |
2757 | struct scsi_device *sdev = scsi_disk(disk)->device; | |
2758 | ||
2759 | if (sdev->host->hostt->unlock_native_capacity) | |
2760 | sdev->host->hostt->unlock_native_capacity(sdev); | |
2761 | } | |
2762 | ||
3e1a7ff8 TH |
2763 | /** |
2764 | * sd_format_disk_name - format disk name | |
2765 | * @prefix: name prefix - ie. "sd" for SCSI disks | |
2766 | * @index: index of the disk to format name for | |
2767 | * @buf: output buffer | |
2768 | * @buflen: length of the output buffer | |
2769 | * | |
2770 | * SCSI disk names starts at sda. The 26th device is sdz and the | |
2771 | * 27th is sdaa. The last one for two lettered suffix is sdzz | |
2772 | * which is followed by sdaaa. | |
2773 | * | |
2774 | * This is basically 26 base counting with one extra 'nil' entry | |
3ad2f3fb | 2775 | * at the beginning from the second digit on and can be |
3e1a7ff8 TH |
2776 | * determined using similar method as 26 base conversion with the |
2777 | * index shifted -1 after each digit is computed. | |
2778 | * | |
2779 | * CONTEXT: | |
2780 | * Don't care. | |
2781 | * | |
2782 | * RETURNS: | |
2783 | * 0 on success, -errno on failure. | |
2784 | */ | |
2785 | static int sd_format_disk_name(char *prefix, int index, char *buf, int buflen) | |
2786 | { | |
2787 | const int base = 'z' - 'a' + 1; | |
2788 | char *begin = buf + strlen(prefix); | |
2789 | char *end = buf + buflen; | |
2790 | char *p; | |
2791 | int unit; | |
2792 | ||
2793 | p = end - 1; | |
2794 | *p = '\0'; | |
2795 | unit = base; | |
2796 | do { | |
2797 | if (p == begin) | |
2798 | return -EINVAL; | |
2799 | *--p = 'a' + (index % unit); | |
2800 | index = (index / unit) - 1; | |
2801 | } while (index >= 0); | |
2802 | ||
2803 | memmove(begin, p, end - p); | |
2804 | memcpy(buf, prefix, strlen(prefix)); | |
2805 | ||
2806 | return 0; | |
2807 | } | |
2808 | ||
4ace92fc AV |
2809 | /* |
2810 | * The asynchronous part of sd_probe | |
2811 | */ | |
2812 | static void sd_probe_async(void *data, async_cookie_t cookie) | |
2813 | { | |
2814 | struct scsi_disk *sdkp = data; | |
2815 | struct scsi_device *sdp; | |
2816 | struct gendisk *gd; | |
2817 | u32 index; | |
2818 | struct device *dev; | |
2819 | ||
2820 | sdp = sdkp->device; | |
2821 | gd = sdkp->disk; | |
2822 | index = sdkp->index; | |
2823 | dev = &sdp->sdev_gendev; | |
2824 | ||
1a03ae0f MR |
2825 | gd->major = sd_major((index & 0xf0) >> 4); |
2826 | gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00); | |
2827 | gd->minors = SD_MINORS; | |
2828 | ||
4ace92fc AV |
2829 | gd->fops = &sd_fops; |
2830 | gd->private_data = &sdkp->driver; | |
2831 | gd->queue = sdkp->device->request_queue; | |
2832 | ||
70a9b873 MP |
2833 | /* defaults, until the device tells us otherwise */ |
2834 | sdp->sector_size = 512; | |
2835 | sdkp->capacity = 0; | |
2836 | sdkp->media_present = 1; | |
2837 | sdkp->write_prot = 0; | |
39c60a09 | 2838 | sdkp->cache_override = 0; |
70a9b873 MP |
2839 | sdkp->WCE = 0; |
2840 | sdkp->RCD = 0; | |
2841 | sdkp->ATO = 0; | |
2842 | sdkp->first_scan = 1; | |
18a4d0a2 | 2843 | sdkp->max_medium_access_timeouts = SD_MAX_MEDIUM_TIMEOUTS; |
70a9b873 | 2844 | |
4ace92fc AV |
2845 | sd_revalidate_disk(gd); |
2846 | ||
2847 | blk_queue_prep_rq(sdp->request_queue, sd_prep_fn); | |
f1126e95 | 2848 | blk_queue_unprep_rq(sdp->request_queue, sd_unprep_fn); |
4ace92fc AV |
2849 | |
2850 | gd->driverfs_dev = &sdp->sdev_gendev; | |
97fedbbe | 2851 | gd->flags = GENHD_FL_EXT_DEVT; |
2bae0093 | 2852 | if (sdp->removable) { |
4ace92fc | 2853 | gd->flags |= GENHD_FL_REMOVABLE; |
2bae0093 TH |
2854 | gd->events |= DISK_EVENT_MEDIA_CHANGE; |
2855 | } | |
4ace92fc | 2856 | |
10c580e4 | 2857 | blk_pm_runtime_init(sdp->request_queue, dev); |
4ace92fc | 2858 | add_disk(gd); |
fe542396 MP |
2859 | if (sdkp->capacity) |
2860 | sd_dif_config_host(sdkp); | |
4ace92fc | 2861 | |
3821d768 MP |
2862 | sd_revalidate_disk(gd); |
2863 | ||
4ace92fc AV |
2864 | sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n", |
2865 | sdp->removable ? "removable " : ""); | |
478a8a05 | 2866 | scsi_autopm_put_device(sdp); |
ea038f63 | 2867 | put_device(&sdkp->dev); |
4ace92fc AV |
2868 | } |
2869 | ||
1da177e4 LT |
2870 | /** |
2871 | * sd_probe - called during driver initialization and whenever a | |
2872 | * new scsi device is attached to the system. It is called once | |
2873 | * for each scsi device (not just disks) present. | |
2874 | * @dev: pointer to device object | |
2875 | * | |
2876 | * Returns 0 if successful (or not interested in this scsi device | |
2877 | * (e.g. scanner)); 1 when there is an error. | |
2878 | * | |
2879 | * Note: this function is invoked from the scsi mid-level. | |
2880 | * This function sets up the mapping between a given | |
2881 | * <host,channel,id,lun> (found in sdp) and new device name | |
2882 | * (e.g. /dev/sda). More precisely it is the block device major | |
2883 | * and minor number that is chosen here. | |
2884 | * | |
2db93ce8 PU |
2885 | * Assume sd_probe is not re-entrant (for time being) |
2886 | * Also think about sd_probe() and sd_remove() running coincidentally. | |
1da177e4 LT |
2887 | **/ |
2888 | static int sd_probe(struct device *dev) | |
2889 | { | |
2890 | struct scsi_device *sdp = to_scsi_device(dev); | |
2891 | struct scsi_disk *sdkp; | |
2892 | struct gendisk *gd; | |
439d77f7 | 2893 | int index; |
1da177e4 LT |
2894 | int error; |
2895 | ||
2896 | error = -ENODEV; | |
631e8a13 | 2897 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_MOD && sdp->type != TYPE_RBC) |
1da177e4 LT |
2898 | goto out; |
2899 | ||
9ccfc756 | 2900 | SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO, sdp, |
2db93ce8 | 2901 | "sd_probe\n")); |
1da177e4 LT |
2902 | |
2903 | error = -ENOMEM; | |
24669f75 | 2904 | sdkp = kzalloc(sizeof(*sdkp), GFP_KERNEL); |
1da177e4 LT |
2905 | if (!sdkp) |
2906 | goto out; | |
2907 | ||
689d6fac | 2908 | gd = alloc_disk(SD_MINORS); |
1da177e4 LT |
2909 | if (!gd) |
2910 | goto out_free; | |
2911 | ||
f27bac27 TH |
2912 | do { |
2913 | if (!ida_pre_get(&sd_index_ida, GFP_KERNEL)) | |
2914 | goto out_put; | |
1da177e4 | 2915 | |
4034cc68 | 2916 | spin_lock(&sd_index_lock); |
f27bac27 | 2917 | error = ida_get_new(&sd_index_ida, &index); |
4034cc68 | 2918 | spin_unlock(&sd_index_lock); |
f27bac27 | 2919 | } while (error == -EAGAIN); |
1da177e4 | 2920 | |
21208ae5 DK |
2921 | if (error) { |
2922 | sdev_printk(KERN_WARNING, sdp, "sd_probe: memory exhausted.\n"); | |
1da177e4 | 2923 | goto out_put; |
1a03ae0f MR |
2924 | } |
2925 | ||
3e1a7ff8 | 2926 | error = sd_format_disk_name("sd", index, gd->disk_name, DISK_NAME_LEN); |
21208ae5 DK |
2927 | if (error) { |
2928 | sdev_printk(KERN_WARNING, sdp, "SCSI disk (sd) name length exceeded.\n"); | |
f27bac27 | 2929 | goto out_free_index; |
21208ae5 | 2930 | } |
f27bac27 | 2931 | |
1da177e4 LT |
2932 | sdkp->device = sdp; |
2933 | sdkp->driver = &sd_template; | |
2934 | sdkp->disk = gd; | |
2935 | sdkp->index = index; | |
409f3499 | 2936 | atomic_set(&sdkp->openers, 0); |
9e1a1537 | 2937 | atomic_set(&sdkp->device->ioerr_cnt, 0); |
1da177e4 | 2938 | |
601e7638 JB |
2939 | if (!sdp->request_queue->rq_timeout) { |
2940 | if (sdp->type != TYPE_MOD) | |
2941 | blk_queue_rq_timeout(sdp->request_queue, SD_TIMEOUT); | |
2942 | else | |
2943 | blk_queue_rq_timeout(sdp->request_queue, | |
2944 | SD_MOD_TIMEOUT); | |
2945 | } | |
2946 | ||
2947 | device_initialize(&sdkp->dev); | |
478a8a05 | 2948 | sdkp->dev.parent = dev; |
601e7638 | 2949 | sdkp->dev.class = &sd_disk_class; |
02aa2a37 | 2950 | dev_set_name(&sdkp->dev, "%s", dev_name(dev)); |
601e7638 JB |
2951 | |
2952 | if (device_add(&sdkp->dev)) | |
2953 | goto out_free_index; | |
2954 | ||
478a8a05 AS |
2955 | get_device(dev); |
2956 | dev_set_drvdata(dev, sdkp); | |
601e7638 | 2957 | |
ea038f63 | 2958 | get_device(&sdkp->dev); /* prevent release before async_schedule */ |
a7a20d10 | 2959 | async_schedule_domain(sd_probe_async, sdkp, &scsi_sd_probe_domain); |
1da177e4 LT |
2960 | |
2961 | return 0; | |
2962 | ||
f27bac27 | 2963 | out_free_index: |
4034cc68 | 2964 | spin_lock(&sd_index_lock); |
f27bac27 | 2965 | ida_remove(&sd_index_ida, index); |
4034cc68 | 2966 | spin_unlock(&sd_index_lock); |
6bdaa1f1 | 2967 | out_put: |
1da177e4 | 2968 | put_disk(gd); |
6bdaa1f1 | 2969 | out_free: |
1da177e4 | 2970 | kfree(sdkp); |
6bdaa1f1 | 2971 | out: |
1da177e4 LT |
2972 | return error; |
2973 | } | |
2974 | ||
2975 | /** | |
2976 | * sd_remove - called whenever a scsi disk (previously recognized by | |
2977 | * sd_probe) is detached from the system. It is called (potentially | |
2978 | * multiple times) during sd module unload. | |
2979 | * @sdp: pointer to mid level scsi device object | |
2980 | * | |
2981 | * Note: this function is invoked from the scsi mid-level. | |
2982 | * This function potentially frees up a device name (e.g. /dev/sdc) | |
2983 | * that could be re-used by a subsequent sd_probe(). | |
2984 | * This function is not called when the built-in sd driver is "exit-ed". | |
2985 | **/ | |
2986 | static int sd_remove(struct device *dev) | |
2987 | { | |
601e7638 | 2988 | struct scsi_disk *sdkp; |
0761df9c | 2989 | dev_t devt; |
1da177e4 | 2990 | |
601e7638 | 2991 | sdkp = dev_get_drvdata(dev); |
0761df9c | 2992 | devt = disk_devt(sdkp->disk); |
478a8a05 AS |
2993 | scsi_autopm_get_device(sdkp->device); |
2994 | ||
a7a20d10 | 2995 | async_synchronize_full_domain(&scsi_sd_probe_domain); |
b391277a | 2996 | blk_queue_prep_rq(sdkp->device->request_queue, scsi_prep_fn); |
82b6d57f | 2997 | blk_queue_unprep_rq(sdkp->device->request_queue, NULL); |
ee959b00 | 2998 | device_del(&sdkp->dev); |
1da177e4 LT |
2999 | del_gendisk(sdkp->disk); |
3000 | sd_shutdown(dev); | |
39b7f1e2 | 3001 | |
0761df9c HR |
3002 | blk_register_region(devt, SD_MINORS, NULL, |
3003 | sd_default_probe, NULL, NULL); | |
3004 | ||
0b950672 | 3005 | mutex_lock(&sd_ref_mutex); |
39b7f1e2 | 3006 | dev_set_drvdata(dev, NULL); |
ee959b00 | 3007 | put_device(&sdkp->dev); |
0b950672 | 3008 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
3009 | |
3010 | return 0; | |
3011 | } | |
3012 | ||
3013 | /** | |
3014 | * scsi_disk_release - Called to free the scsi_disk structure | |
ee959b00 | 3015 | * @dev: pointer to embedded class device |
1da177e4 | 3016 | * |
0b950672 | 3017 | * sd_ref_mutex must be held entering this routine. Because it is |
1da177e4 LT |
3018 | * called on last put, you should always use the scsi_disk_get() |
3019 | * scsi_disk_put() helpers which manipulate the semaphore directly | |
ee959b00 | 3020 | * and never do a direct put_device. |
1da177e4 | 3021 | **/ |
ee959b00 | 3022 | static void scsi_disk_release(struct device *dev) |
1da177e4 | 3023 | { |
ee959b00 | 3024 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
1da177e4 LT |
3025 | struct gendisk *disk = sdkp->disk; |
3026 | ||
4034cc68 | 3027 | spin_lock(&sd_index_lock); |
f27bac27 | 3028 | ida_remove(&sd_index_ida, sdkp->index); |
4034cc68 | 3029 | spin_unlock(&sd_index_lock); |
1da177e4 LT |
3030 | |
3031 | disk->private_data = NULL; | |
1da177e4 | 3032 | put_disk(disk); |
39b7f1e2 | 3033 | put_device(&sdkp->device->sdev_gendev); |
1da177e4 LT |
3034 | |
3035 | kfree(sdkp); | |
3036 | } | |
3037 | ||
cc5d2c8c | 3038 | static int sd_start_stop_device(struct scsi_disk *sdkp, int start) |
c3c94c5a TH |
3039 | { |
3040 | unsigned char cmd[6] = { START_STOP }; /* START_VALID */ | |
3041 | struct scsi_sense_hdr sshdr; | |
cc5d2c8c | 3042 | struct scsi_device *sdp = sdkp->device; |
c3c94c5a TH |
3043 | int res; |
3044 | ||
3045 | if (start) | |
3046 | cmd[4] |= 1; /* START */ | |
3047 | ||
d2886ea3 SR |
3048 | if (sdp->start_stop_pwr_cond) |
3049 | cmd[4] |= start ? 1 << 4 : 3 << 4; /* Active or Standby */ | |
3050 | ||
c3c94c5a TH |
3051 | if (!scsi_device_online(sdp)) |
3052 | return -ENODEV; | |
3053 | ||
9b21493c LM |
3054 | res = scsi_execute_req_flags(sdp, cmd, DMA_NONE, NULL, 0, &sshdr, |
3055 | SD_TIMEOUT, SD_MAX_RETRIES, NULL, REQ_PM); | |
c3c94c5a | 3056 | if (res) { |
cc5d2c8c JB |
3057 | sd_printk(KERN_WARNING, sdkp, "START_STOP FAILED\n"); |
3058 | sd_print_result(sdkp, res); | |
c3c94c5a | 3059 | if (driver_byte(res) & DRIVER_SENSE) |
cc5d2c8c | 3060 | sd_print_sense_hdr(sdkp, &sshdr); |
c3c94c5a TH |
3061 | } |
3062 | ||
3063 | return res; | |
3064 | } | |
3065 | ||
1da177e4 LT |
3066 | /* |
3067 | * Send a SYNCHRONIZE CACHE instruction down to the device through | |
3068 | * the normal SCSI command structure. Wait for the command to | |
3069 | * complete. | |
3070 | */ | |
3071 | static void sd_shutdown(struct device *dev) | |
3072 | { | |
39b7f1e2 | 3073 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
1da177e4 LT |
3074 | |
3075 | if (!sdkp) | |
3076 | return; /* this can happen */ | |
3077 | ||
54f57588 LM |
3078 | if (pm_runtime_suspended(dev)) |
3079 | goto exit; | |
3080 | ||
39b7f1e2 | 3081 | if (sdkp->WCE) { |
e73aec82 MP |
3082 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
3083 | sd_sync_cache(sdkp); | |
39b7f1e2 | 3084 | } |
c3c94c5a | 3085 | |
cc5d2c8c JB |
3086 | if (system_state != SYSTEM_RESTART && sdkp->device->manage_start_stop) { |
3087 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); | |
3088 | sd_start_stop_device(sdkp, 0); | |
c3c94c5a TH |
3089 | } |
3090 | ||
54f57588 | 3091 | exit: |
39b7f1e2 AS |
3092 | scsi_disk_put(sdkp); |
3093 | } | |
1da177e4 | 3094 | |
691e3d31 | 3095 | static int sd_suspend(struct device *dev) |
c3c94c5a | 3096 | { |
c3c94c5a | 3097 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
09ff92fe | 3098 | int ret = 0; |
c3c94c5a TH |
3099 | |
3100 | if (!sdkp) | |
3101 | return 0; /* this can happen */ | |
3102 | ||
3103 | if (sdkp->WCE) { | |
cc5d2c8c | 3104 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
c3c94c5a TH |
3105 | ret = sd_sync_cache(sdkp); |
3106 | if (ret) | |
09ff92fe | 3107 | goto done; |
c3c94c5a TH |
3108 | } |
3109 | ||
691e3d31 | 3110 | if (sdkp->device->manage_start_stop) { |
cc5d2c8c JB |
3111 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); |
3112 | ret = sd_start_stop_device(sdkp, 0); | |
c3c94c5a TH |
3113 | } |
3114 | ||
09ff92fe AS |
3115 | done: |
3116 | scsi_disk_put(sdkp); | |
3117 | return ret; | |
c3c94c5a TH |
3118 | } |
3119 | ||
3120 | static int sd_resume(struct device *dev) | |
3121 | { | |
c3c94c5a | 3122 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
09ff92fe | 3123 | int ret = 0; |
c3c94c5a | 3124 | |
cc5d2c8c | 3125 | if (!sdkp->device->manage_start_stop) |
09ff92fe | 3126 | goto done; |
c3c94c5a | 3127 | |
cc5d2c8c | 3128 | sd_printk(KERN_NOTICE, sdkp, "Starting disk\n"); |
09ff92fe | 3129 | ret = sd_start_stop_device(sdkp, 1); |
c3c94c5a | 3130 | |
09ff92fe AS |
3131 | done: |
3132 | scsi_disk_put(sdkp); | |
3133 | return ret; | |
c3c94c5a TH |
3134 | } |
3135 | ||
1da177e4 LT |
3136 | /** |
3137 | * init_sd - entry point for this driver (both when built in or when | |
3138 | * a module). | |
3139 | * | |
3140 | * Note: this function registers this driver with the scsi mid-level. | |
3141 | **/ | |
3142 | static int __init init_sd(void) | |
3143 | { | |
5e4009ba | 3144 | int majors = 0, i, err; |
1da177e4 LT |
3145 | |
3146 | SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n")); | |
3147 | ||
0761df9c HR |
3148 | for (i = 0; i < SD_MAJORS; i++) { |
3149 | if (register_blkdev(sd_major(i), "sd") != 0) | |
3150 | continue; | |
3151 | majors++; | |
3152 | blk_register_region(sd_major(i), SD_MINORS, NULL, | |
3153 | sd_default_probe, NULL, NULL); | |
3154 | } | |
1da177e4 LT |
3155 | |
3156 | if (!majors) | |
3157 | return -ENODEV; | |
3158 | ||
5e4009ba JG |
3159 | err = class_register(&sd_disk_class); |
3160 | if (err) | |
3161 | goto err_out; | |
6bdaa1f1 | 3162 | |
4e7392ec MP |
3163 | sd_cdb_cache = kmem_cache_create("sd_ext_cdb", SD_EXT_CDB_SIZE, |
3164 | 0, 0, NULL); | |
3165 | if (!sd_cdb_cache) { | |
3166 | printk(KERN_ERR "sd: can't init extended cdb cache\n"); | |
3167 | goto err_out_class; | |
3168 | } | |
3169 | ||
3170 | sd_cdb_pool = mempool_create_slab_pool(SD_MEMPOOL_SIZE, sd_cdb_cache); | |
3171 | if (!sd_cdb_pool) { | |
3172 | printk(KERN_ERR "sd: can't init extended cdb pool\n"); | |
3173 | goto err_out_cache; | |
3174 | } | |
3175 | ||
afd5e34b JD |
3176 | err = scsi_register_driver(&sd_template.gendrv); |
3177 | if (err) | |
3178 | goto err_out_driver; | |
3179 | ||
5e4009ba JG |
3180 | return 0; |
3181 | ||
afd5e34b JD |
3182 | err_out_driver: |
3183 | mempool_destroy(sd_cdb_pool); | |
3184 | ||
4e7392ec MP |
3185 | err_out_cache: |
3186 | kmem_cache_destroy(sd_cdb_cache); | |
3187 | ||
5e4009ba JG |
3188 | err_out_class: |
3189 | class_unregister(&sd_disk_class); | |
3190 | err_out: | |
3191 | for (i = 0; i < SD_MAJORS; i++) | |
3192 | unregister_blkdev(sd_major(i), "sd"); | |
3193 | return err; | |
1da177e4 LT |
3194 | } |
3195 | ||
3196 | /** | |
3197 | * exit_sd - exit point for this driver (when it is a module). | |
3198 | * | |
3199 | * Note: this function unregisters this driver from the scsi mid-level. | |
3200 | **/ | |
3201 | static void __exit exit_sd(void) | |
3202 | { | |
3203 | int i; | |
3204 | ||
3205 | SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n")); | |
3206 | ||
afd5e34b | 3207 | scsi_unregister_driver(&sd_template.gendrv); |
4e7392ec MP |
3208 | mempool_destroy(sd_cdb_pool); |
3209 | kmem_cache_destroy(sd_cdb_cache); | |
3210 | ||
5e4009ba JG |
3211 | class_unregister(&sd_disk_class); |
3212 | ||
0761df9c HR |
3213 | for (i = 0; i < SD_MAJORS; i++) { |
3214 | blk_unregister_region(sd_major(i), SD_MINORS); | |
1da177e4 | 3215 | unregister_blkdev(sd_major(i), "sd"); |
0761df9c | 3216 | } |
1da177e4 LT |
3217 | } |
3218 | ||
1da177e4 LT |
3219 | module_init(init_sd); |
3220 | module_exit(exit_sd); | |
e73aec82 MP |
3221 | |
3222 | static void sd_print_sense_hdr(struct scsi_disk *sdkp, | |
3223 | struct scsi_sense_hdr *sshdr) | |
3224 | { | |
2e4c3329 | 3225 | sd_printk(KERN_INFO, sdkp, " "); |
e73aec82 | 3226 | scsi_show_sense_hdr(sshdr); |
2e4c3329 | 3227 | sd_printk(KERN_INFO, sdkp, " "); |
e73aec82 MP |
3228 | scsi_show_extd_sense(sshdr->asc, sshdr->ascq); |
3229 | } | |
3230 | ||
3231 | static void sd_print_result(struct scsi_disk *sdkp, int result) | |
3232 | { | |
2e4c3329 | 3233 | sd_printk(KERN_INFO, sdkp, " "); |
e73aec82 MP |
3234 | scsi_show_result(result); |
3235 | } | |
3236 |