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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> |
1da177e4 | 53 | #include <asm/uaccess.h> |
8f76d151 | 54 | #include <asm/unaligned.h> |
1da177e4 LT |
55 | |
56 | #include <scsi/scsi.h> | |
57 | #include <scsi/scsi_cmnd.h> | |
58 | #include <scsi/scsi_dbg.h> | |
59 | #include <scsi/scsi_device.h> | |
60 | #include <scsi/scsi_driver.h> | |
61 | #include <scsi/scsi_eh.h> | |
62 | #include <scsi/scsi_host.h> | |
63 | #include <scsi/scsi_ioctl.h> | |
1da177e4 LT |
64 | #include <scsi/scsicam.h> |
65 | ||
aa91696e | 66 | #include "sd.h" |
1da177e4 LT |
67 | #include "scsi_logging.h" |
68 | ||
f018fa55 RH |
69 | MODULE_AUTHOR("Eric Youngdale"); |
70 | MODULE_DESCRIPTION("SCSI disk (sd) driver"); | |
71 | MODULE_LICENSE("GPL"); | |
72 | ||
73 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK0_MAJOR); | |
74 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK1_MAJOR); | |
75 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK2_MAJOR); | |
76 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK3_MAJOR); | |
77 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK4_MAJOR); | |
78 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK5_MAJOR); | |
79 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK6_MAJOR); | |
80 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK7_MAJOR); | |
81 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK8_MAJOR); | |
82 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK9_MAJOR); | |
83 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK10_MAJOR); | |
84 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK11_MAJOR); | |
85 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK12_MAJOR); | |
86 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK13_MAJOR); | |
87 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK14_MAJOR); | |
88 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK15_MAJOR); | |
d7b8bcb0 MT |
89 | MODULE_ALIAS_SCSI_DEVICE(TYPE_DISK); |
90 | MODULE_ALIAS_SCSI_DEVICE(TYPE_MOD); | |
91 | MODULE_ALIAS_SCSI_DEVICE(TYPE_RBC); | |
f018fa55 | 92 | |
870d6656 | 93 | #if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT) |
f615b48c | 94 | #define SD_MINORS 16 |
870d6656 | 95 | #else |
3e1a7ff8 | 96 | #define SD_MINORS 0 |
870d6656 TH |
97 | #endif |
98 | ||
7b3d9545 | 99 | static int sd_revalidate_disk(struct gendisk *); |
72ec24bd | 100 | static void sd_unlock_native_capacity(struct gendisk *disk); |
7b3d9545 LT |
101 | static int sd_probe(struct device *); |
102 | static int sd_remove(struct device *); | |
103 | static void sd_shutdown(struct device *); | |
104 | static int sd_suspend(struct device *, pm_message_t state); | |
105 | static int sd_resume(struct device *); | |
106 | static void sd_rescan(struct device *); | |
107 | static int sd_done(struct scsi_cmnd *); | |
108 | static void sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer); | |
ee959b00 | 109 | static void scsi_disk_release(struct device *cdev); |
7b3d9545 LT |
110 | static void sd_print_sense_hdr(struct scsi_disk *, struct scsi_sense_hdr *); |
111 | static void sd_print_result(struct scsi_disk *, int); | |
112 | ||
4034cc68 | 113 | static DEFINE_SPINLOCK(sd_index_lock); |
f27bac27 | 114 | static DEFINE_IDA(sd_index_ida); |
1da177e4 LT |
115 | |
116 | /* This semaphore is used to mediate the 0->1 reference get in the | |
117 | * face of object destruction (i.e. we can't allow a get on an | |
118 | * object after last put) */ | |
0b950672 | 119 | static DEFINE_MUTEX(sd_ref_mutex); |
1da177e4 | 120 | |
439d77f7 HS |
121 | static struct kmem_cache *sd_cdb_cache; |
122 | static mempool_t *sd_cdb_pool; | |
4e7392ec | 123 | |
6bdaa1f1 JB |
124 | static const char *sd_cache_types[] = { |
125 | "write through", "none", "write back", | |
126 | "write back, no read (daft)" | |
127 | }; | |
128 | ||
ee959b00 TJ |
129 | static ssize_t |
130 | sd_store_cache_type(struct device *dev, struct device_attribute *attr, | |
131 | const char *buf, size_t count) | |
6bdaa1f1 JB |
132 | { |
133 | int i, ct = -1, rcd, wce, sp; | |
ee959b00 | 134 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
135 | struct scsi_device *sdp = sdkp->device; |
136 | char buffer[64]; | |
137 | char *buffer_data; | |
138 | struct scsi_mode_data data; | |
139 | struct scsi_sense_hdr sshdr; | |
140 | int len; | |
141 | ||
142 | if (sdp->type != TYPE_DISK) | |
143 | /* no cache control on RBC devices; theoretically they | |
144 | * can do it, but there's probably so many exceptions | |
145 | * it's not worth the risk */ | |
146 | return -EINVAL; | |
147 | ||
6391a113 | 148 | for (i = 0; i < ARRAY_SIZE(sd_cache_types); i++) { |
439d77f7 | 149 | len = strlen(sd_cache_types[i]); |
6bdaa1f1 JB |
150 | if (strncmp(sd_cache_types[i], buf, len) == 0 && |
151 | buf[len] == '\n') { | |
152 | ct = i; | |
153 | break; | |
154 | } | |
155 | } | |
156 | if (ct < 0) | |
157 | return -EINVAL; | |
158 | rcd = ct & 0x01 ? 1 : 0; | |
159 | wce = ct & 0x02 ? 1 : 0; | |
160 | if (scsi_mode_sense(sdp, 0x08, 8, buffer, sizeof(buffer), SD_TIMEOUT, | |
161 | SD_MAX_RETRIES, &data, NULL)) | |
162 | return -EINVAL; | |
a9312fb8 | 163 | len = min_t(size_t, sizeof(buffer), data.length - data.header_length - |
6bdaa1f1 JB |
164 | data.block_descriptor_length); |
165 | buffer_data = buffer + data.header_length + | |
166 | data.block_descriptor_length; | |
167 | buffer_data[2] &= ~0x05; | |
168 | buffer_data[2] |= wce << 2 | rcd; | |
169 | sp = buffer_data[0] & 0x80 ? 1 : 0; | |
170 | ||
171 | if (scsi_mode_select(sdp, 1, sp, 8, buffer_data, len, SD_TIMEOUT, | |
172 | SD_MAX_RETRIES, &data, &sshdr)) { | |
173 | if (scsi_sense_valid(&sshdr)) | |
e73aec82 | 174 | sd_print_sense_hdr(sdkp, &sshdr); |
6bdaa1f1 JB |
175 | return -EINVAL; |
176 | } | |
f98a8cae | 177 | revalidate_disk(sdkp->disk); |
6bdaa1f1 JB |
178 | return count; |
179 | } | |
180 | ||
ee959b00 TJ |
181 | static ssize_t |
182 | sd_store_manage_start_stop(struct device *dev, struct device_attribute *attr, | |
183 | const char *buf, size_t count) | |
c3c94c5a | 184 | { |
ee959b00 | 185 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
c3c94c5a TH |
186 | struct scsi_device *sdp = sdkp->device; |
187 | ||
188 | if (!capable(CAP_SYS_ADMIN)) | |
189 | return -EACCES; | |
190 | ||
191 | sdp->manage_start_stop = simple_strtoul(buf, NULL, 10); | |
192 | ||
193 | return count; | |
194 | } | |
195 | ||
ee959b00 TJ |
196 | static ssize_t |
197 | sd_store_allow_restart(struct device *dev, struct device_attribute *attr, | |
198 | const char *buf, size_t count) | |
a144c5ae | 199 | { |
ee959b00 | 200 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
a144c5ae BK |
201 | struct scsi_device *sdp = sdkp->device; |
202 | ||
203 | if (!capable(CAP_SYS_ADMIN)) | |
204 | return -EACCES; | |
205 | ||
206 | if (sdp->type != TYPE_DISK) | |
207 | return -EINVAL; | |
208 | ||
209 | sdp->allow_restart = simple_strtoul(buf, NULL, 10); | |
210 | ||
211 | return count; | |
212 | } | |
213 | ||
ee959b00 TJ |
214 | static ssize_t |
215 | sd_show_cache_type(struct device *dev, struct device_attribute *attr, | |
216 | char *buf) | |
6bdaa1f1 | 217 | { |
ee959b00 | 218 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
219 | int ct = sdkp->RCD + 2*sdkp->WCE; |
220 | ||
221 | return snprintf(buf, 40, "%s\n", sd_cache_types[ct]); | |
222 | } | |
223 | ||
ee959b00 TJ |
224 | static ssize_t |
225 | sd_show_fua(struct device *dev, struct device_attribute *attr, char *buf) | |
6bdaa1f1 | 226 | { |
ee959b00 | 227 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
228 | |
229 | return snprintf(buf, 20, "%u\n", sdkp->DPOFUA); | |
230 | } | |
231 | ||
ee959b00 TJ |
232 | static ssize_t |
233 | sd_show_manage_start_stop(struct device *dev, struct device_attribute *attr, | |
234 | char *buf) | |
c3c94c5a | 235 | { |
ee959b00 | 236 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
c3c94c5a TH |
237 | struct scsi_device *sdp = sdkp->device; |
238 | ||
239 | return snprintf(buf, 20, "%u\n", sdp->manage_start_stop); | |
240 | } | |
241 | ||
ee959b00 TJ |
242 | static ssize_t |
243 | sd_show_allow_restart(struct device *dev, struct device_attribute *attr, | |
244 | char *buf) | |
a144c5ae | 245 | { |
ee959b00 | 246 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
a144c5ae BK |
247 | |
248 | return snprintf(buf, 40, "%d\n", sdkp->device->allow_restart); | |
249 | } | |
250 | ||
e0597d70 MP |
251 | static ssize_t |
252 | sd_show_protection_type(struct device *dev, struct device_attribute *attr, | |
253 | char *buf) | |
254 | { | |
255 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
256 | ||
257 | return snprintf(buf, 20, "%u\n", sdkp->protection_type); | |
258 | } | |
259 | ||
518fa8e3 MP |
260 | static ssize_t |
261 | sd_show_protection_mode(struct device *dev, struct device_attribute *attr, | |
262 | char *buf) | |
263 | { | |
264 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
265 | struct scsi_device *sdp = sdkp->device; | |
266 | unsigned int dif, dix; | |
267 | ||
268 | dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type); | |
269 | dix = scsi_host_dix_capable(sdp->host, sdkp->protection_type); | |
270 | ||
271 | if (!dix && scsi_host_dix_capable(sdp->host, SD_DIF_TYPE0_PROTECTION)) { | |
272 | dif = 0; | |
273 | dix = 1; | |
274 | } | |
275 | ||
276 | if (!dif && !dix) | |
277 | return snprintf(buf, 20, "none\n"); | |
278 | ||
279 | return snprintf(buf, 20, "%s%u\n", dix ? "dix" : "dif", dif); | |
280 | } | |
281 | ||
e0597d70 MP |
282 | static ssize_t |
283 | sd_show_app_tag_own(struct device *dev, struct device_attribute *attr, | |
284 | char *buf) | |
285 | { | |
286 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
287 | ||
288 | return snprintf(buf, 20, "%u\n", sdkp->ATO); | |
289 | } | |
290 | ||
e339c1a7 MP |
291 | static ssize_t |
292 | sd_show_thin_provisioning(struct device *dev, struct device_attribute *attr, | |
293 | char *buf) | |
294 | { | |
295 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
296 | ||
297 | return snprintf(buf, 20, "%u\n", sdkp->thin_provisioning); | |
298 | } | |
299 | ||
ee959b00 | 300 | static struct device_attribute sd_disk_attrs[] = { |
6bdaa1f1 JB |
301 | __ATTR(cache_type, S_IRUGO|S_IWUSR, sd_show_cache_type, |
302 | sd_store_cache_type), | |
303 | __ATTR(FUA, S_IRUGO, sd_show_fua, NULL), | |
a144c5ae BK |
304 | __ATTR(allow_restart, S_IRUGO|S_IWUSR, sd_show_allow_restart, |
305 | sd_store_allow_restart), | |
c3c94c5a TH |
306 | __ATTR(manage_start_stop, S_IRUGO|S_IWUSR, sd_show_manage_start_stop, |
307 | sd_store_manage_start_stop), | |
e0597d70 | 308 | __ATTR(protection_type, S_IRUGO, sd_show_protection_type, NULL), |
518fa8e3 | 309 | __ATTR(protection_mode, S_IRUGO, sd_show_protection_mode, NULL), |
e0597d70 | 310 | __ATTR(app_tag_own, S_IRUGO, sd_show_app_tag_own, NULL), |
e339c1a7 | 311 | __ATTR(thin_provisioning, S_IRUGO, sd_show_thin_provisioning, NULL), |
6bdaa1f1 JB |
312 | __ATTR_NULL, |
313 | }; | |
314 | ||
315 | static struct class sd_disk_class = { | |
316 | .name = "scsi_disk", | |
317 | .owner = THIS_MODULE, | |
ee959b00 TJ |
318 | .dev_release = scsi_disk_release, |
319 | .dev_attrs = sd_disk_attrs, | |
6bdaa1f1 | 320 | }; |
1da177e4 LT |
321 | |
322 | static struct scsi_driver sd_template = { | |
323 | .owner = THIS_MODULE, | |
324 | .gendrv = { | |
325 | .name = "sd", | |
326 | .probe = sd_probe, | |
327 | .remove = sd_remove, | |
c3c94c5a TH |
328 | .suspend = sd_suspend, |
329 | .resume = sd_resume, | |
1da177e4 LT |
330 | .shutdown = sd_shutdown, |
331 | }, | |
332 | .rescan = sd_rescan, | |
7b3d9545 | 333 | .done = sd_done, |
1da177e4 LT |
334 | }; |
335 | ||
336 | /* | |
337 | * Device no to disk mapping: | |
338 | * | |
339 | * major disc2 disc p1 | |
340 | * |............|.............|....|....| <- dev_t | |
341 | * 31 20 19 8 7 4 3 0 | |
342 | * | |
343 | * Inside a major, we have 16k disks, however mapped non- | |
344 | * contiguously. The first 16 disks are for major0, the next | |
345 | * ones with major1, ... Disk 256 is for major0 again, disk 272 | |
346 | * for major1, ... | |
347 | * As we stay compatible with our numbering scheme, we can reuse | |
348 | * the well-know SCSI majors 8, 65--71, 136--143. | |
349 | */ | |
350 | static int sd_major(int major_idx) | |
351 | { | |
352 | switch (major_idx) { | |
353 | case 0: | |
354 | return SCSI_DISK0_MAJOR; | |
355 | case 1 ... 7: | |
356 | return SCSI_DISK1_MAJOR + major_idx - 1; | |
357 | case 8 ... 15: | |
358 | return SCSI_DISK8_MAJOR + major_idx - 8; | |
359 | default: | |
360 | BUG(); | |
361 | return 0; /* shut up gcc */ | |
362 | } | |
363 | } | |
364 | ||
39b7f1e2 | 365 | static struct scsi_disk *__scsi_disk_get(struct gendisk *disk) |
1da177e4 LT |
366 | { |
367 | struct scsi_disk *sdkp = NULL; | |
368 | ||
39b7f1e2 AS |
369 | if (disk->private_data) { |
370 | sdkp = scsi_disk(disk); | |
371 | if (scsi_device_get(sdkp->device) == 0) | |
ee959b00 | 372 | get_device(&sdkp->dev); |
39b7f1e2 AS |
373 | else |
374 | sdkp = NULL; | |
375 | } | |
376 | return sdkp; | |
377 | } | |
378 | ||
379 | static struct scsi_disk *scsi_disk_get(struct gendisk *disk) | |
380 | { | |
381 | struct scsi_disk *sdkp; | |
382 | ||
0b950672 | 383 | mutex_lock(&sd_ref_mutex); |
39b7f1e2 | 384 | sdkp = __scsi_disk_get(disk); |
0b950672 | 385 | mutex_unlock(&sd_ref_mutex); |
1da177e4 | 386 | return sdkp; |
39b7f1e2 | 387 | } |
1da177e4 | 388 | |
39b7f1e2 AS |
389 | static struct scsi_disk *scsi_disk_get_from_dev(struct device *dev) |
390 | { | |
391 | struct scsi_disk *sdkp; | |
392 | ||
0b950672 | 393 | mutex_lock(&sd_ref_mutex); |
39b7f1e2 AS |
394 | sdkp = dev_get_drvdata(dev); |
395 | if (sdkp) | |
396 | sdkp = __scsi_disk_get(sdkp->disk); | |
0b950672 | 397 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
398 | return sdkp; |
399 | } | |
400 | ||
401 | static void scsi_disk_put(struct scsi_disk *sdkp) | |
402 | { | |
403 | struct scsi_device *sdev = sdkp->device; | |
404 | ||
0b950672 | 405 | mutex_lock(&sd_ref_mutex); |
ee959b00 | 406 | put_device(&sdkp->dev); |
1da177e4 | 407 | scsi_device_put(sdev); |
0b950672 | 408 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
409 | } |
410 | ||
35e1a5d9 MP |
411 | static void sd_prot_op(struct scsi_cmnd *scmd, unsigned int dif) |
412 | { | |
413 | unsigned int prot_op = SCSI_PROT_NORMAL; | |
414 | unsigned int dix = scsi_prot_sg_count(scmd); | |
415 | ||
416 | if (scmd->sc_data_direction == DMA_FROM_DEVICE) { | |
417 | if (dif && dix) | |
418 | prot_op = SCSI_PROT_READ_PASS; | |
419 | else if (dif && !dix) | |
420 | prot_op = SCSI_PROT_READ_STRIP; | |
421 | else if (!dif && dix) | |
422 | prot_op = SCSI_PROT_READ_INSERT; | |
423 | } else { | |
424 | if (dif && dix) | |
425 | prot_op = SCSI_PROT_WRITE_PASS; | |
426 | else if (dif && !dix) | |
427 | prot_op = SCSI_PROT_WRITE_INSERT; | |
428 | else if (!dif && dix) | |
429 | prot_op = SCSI_PROT_WRITE_STRIP; | |
430 | } | |
431 | ||
432 | scsi_set_prot_op(scmd, prot_op); | |
433 | scsi_set_prot_type(scmd, dif); | |
434 | } | |
435 | ||
e339c1a7 | 436 | /** |
66ac0280 CH |
437 | * scsi_setup_discard_cmnd - unmap blocks on thinly provisioned device |
438 | * @sdp: scsi device to operate one | |
e339c1a7 MP |
439 | * @rq: Request to prepare |
440 | * | |
441 | * Will issue either UNMAP or WRITE SAME(16) depending on preference | |
442 | * indicated by target device. | |
443 | **/ | |
66ac0280 | 444 | static int scsi_setup_discard_cmnd(struct scsi_device *sdp, struct request *rq) |
e339c1a7 MP |
445 | { |
446 | struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); | |
447 | struct bio *bio = rq->bio; | |
448 | sector_t sector = bio->bi_sector; | |
66ac0280 CH |
449 | unsigned int nr_sectors = bio_sectors(bio); |
450 | unsigned int len; | |
f1126e95 | 451 | int ret; |
66ac0280 | 452 | struct page *page; |
e339c1a7 MP |
453 | |
454 | if (sdkp->device->sector_size == 4096) { | |
455 | sector >>= 3; | |
66ac0280 | 456 | nr_sectors >>= 3; |
e339c1a7 MP |
457 | } |
458 | ||
e339c1a7 MP |
459 | rq->timeout = SD_TIMEOUT; |
460 | ||
461 | memset(rq->cmd, 0, rq->cmd_len); | |
462 | ||
66ac0280 CH |
463 | page = alloc_page(GFP_ATOMIC | __GFP_ZERO); |
464 | if (!page) | |
465 | return BLKPREP_DEFER; | |
466 | ||
e339c1a7 | 467 | if (sdkp->unmap) { |
66ac0280 | 468 | char *buf = page_address(page); |
e339c1a7 | 469 | |
66ac0280 | 470 | rq->cmd_len = 10; |
e339c1a7 MP |
471 | rq->cmd[0] = UNMAP; |
472 | rq->cmd[8] = 24; | |
e339c1a7 MP |
473 | |
474 | put_unaligned_be16(6 + 16, &buf[0]); | |
475 | put_unaligned_be16(16, &buf[2]); | |
476 | put_unaligned_be64(sector, &buf[8]); | |
66ac0280 | 477 | put_unaligned_be32(nr_sectors, &buf[16]); |
e339c1a7 | 478 | |
66ac0280 | 479 | len = 24; |
e339c1a7 | 480 | } else { |
66ac0280 | 481 | rq->cmd_len = 16; |
e339c1a7 MP |
482 | rq->cmd[0] = WRITE_SAME_16; |
483 | rq->cmd[1] = 0x8; /* UNMAP */ | |
484 | put_unaligned_be64(sector, &rq->cmd[2]); | |
66ac0280 CH |
485 | put_unaligned_be32(nr_sectors, &rq->cmd[10]); |
486 | ||
487 | len = sdkp->device->sector_size; | |
e339c1a7 MP |
488 | } |
489 | ||
66ac0280 | 490 | blk_add_request_payload(rq, page, len); |
f1126e95 FT |
491 | ret = scsi_setup_blk_pc_cmnd(sdp, rq); |
492 | rq->buffer = page_address(page); | |
610a6349 FT |
493 | if (ret != BLKPREP_OK) { |
494 | __free_page(page); | |
495 | rq->buffer = NULL; | |
496 | } | |
f1126e95 FT |
497 | return ret; |
498 | } | |
499 | ||
90467c29 FT |
500 | static int scsi_setup_flush_cmnd(struct scsi_device *sdp, struct request *rq) |
501 | { | |
e3b3e624 | 502 | rq->timeout = SD_FLUSH_TIMEOUT; |
90467c29 FT |
503 | rq->retries = SD_MAX_RETRIES; |
504 | rq->cmd[0] = SYNCHRONIZE_CACHE; | |
505 | rq->cmd_len = 10; | |
506 | ||
507 | return scsi_setup_blk_pc_cmnd(sdp, rq); | |
508 | } | |
509 | ||
f1126e95 FT |
510 | static void sd_unprep_fn(struct request_queue *q, struct request *rq) |
511 | { | |
610a6349 FT |
512 | if (rq->cmd_flags & REQ_DISCARD) { |
513 | free_page((unsigned long)rq->buffer); | |
514 | rq->buffer = NULL; | |
515 | } | |
e339c1a7 MP |
516 | } |
517 | ||
1da177e4 LT |
518 | /** |
519 | * sd_init_command - build a scsi (read or write) command from | |
520 | * information in the request structure. | |
521 | * @SCpnt: pointer to mid-level's per scsi command structure that | |
522 | * contains request and into which the scsi command is written | |
523 | * | |
524 | * Returns 1 if successful and 0 if error (or cannot be done now). | |
525 | **/ | |
7f9a6bc4 | 526 | static int sd_prep_fn(struct request_queue *q, struct request *rq) |
1da177e4 | 527 | { |
7f9a6bc4 JB |
528 | struct scsi_cmnd *SCpnt; |
529 | struct scsi_device *sdp = q->queuedata; | |
776b23a0 | 530 | struct gendisk *disk = rq->rq_disk; |
af55ff67 | 531 | struct scsi_disk *sdkp; |
83096ebf | 532 | sector_t block = blk_rq_pos(rq); |
18351070 | 533 | sector_t threshold; |
83096ebf | 534 | unsigned int this_count = blk_rq_sectors(rq); |
bd623e79 | 535 | int ret, host_dif; |
4e7392ec | 536 | unsigned char protect; |
7f9a6bc4 | 537 | |
e339c1a7 MP |
538 | /* |
539 | * Discard request come in as REQ_TYPE_FS but we turn them into | |
540 | * block PC requests to make life easier. | |
541 | */ | |
66ac0280 CH |
542 | if (rq->cmd_flags & REQ_DISCARD) { |
543 | ret = scsi_setup_discard_cmnd(sdp, rq); | |
544 | goto out; | |
90467c29 FT |
545 | } else if (rq->cmd_flags & REQ_FLUSH) { |
546 | ret = scsi_setup_flush_cmnd(sdp, rq); | |
547 | goto out; | |
66ac0280 | 548 | } else if (rq->cmd_type == REQ_TYPE_BLOCK_PC) { |
7f9a6bc4 JB |
549 | ret = scsi_setup_blk_pc_cmnd(sdp, rq); |
550 | goto out; | |
551 | } else if (rq->cmd_type != REQ_TYPE_FS) { | |
552 | ret = BLKPREP_KILL; | |
553 | goto out; | |
554 | } | |
555 | ret = scsi_setup_fs_cmnd(sdp, rq); | |
556 | if (ret != BLKPREP_OK) | |
557 | goto out; | |
558 | SCpnt = rq->special; | |
af55ff67 | 559 | sdkp = scsi_disk(disk); |
7f9a6bc4 JB |
560 | |
561 | /* from here on until we're complete, any goto out | |
562 | * is used for a killable error condition */ | |
563 | ret = BLKPREP_KILL; | |
1da177e4 | 564 | |
fa0d34be MP |
565 | SCSI_LOG_HLQUEUE(1, scmd_printk(KERN_INFO, SCpnt, |
566 | "sd_init_command: block=%llu, " | |
567 | "count=%d\n", | |
568 | (unsigned long long)block, | |
569 | this_count)); | |
1da177e4 LT |
570 | |
571 | if (!sdp || !scsi_device_online(sdp) || | |
83096ebf | 572 | block + blk_rq_sectors(rq) > get_capacity(disk)) { |
fa0d34be | 573 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
83096ebf TH |
574 | "Finishing %u sectors\n", |
575 | blk_rq_sectors(rq))); | |
fa0d34be MP |
576 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
577 | "Retry with 0x%p\n", SCpnt)); | |
7f9a6bc4 | 578 | goto out; |
1da177e4 LT |
579 | } |
580 | ||
581 | if (sdp->changed) { | |
582 | /* | |
583 | * quietly refuse to do anything to a changed disc until | |
584 | * the changed bit has been reset | |
585 | */ | |
3ff5588d | 586 | /* printk("SCSI disk has been changed or is not present. Prohibiting further I/O.\n"); */ |
7f9a6bc4 | 587 | goto out; |
1da177e4 | 588 | } |
7f9a6bc4 | 589 | |
a0899d4d | 590 | /* |
18351070 LT |
591 | * Some SD card readers can't handle multi-sector accesses which touch |
592 | * the last one or two hardware sectors. Split accesses as needed. | |
a0899d4d | 593 | */ |
18351070 LT |
594 | threshold = get_capacity(disk) - SD_LAST_BUGGY_SECTORS * |
595 | (sdp->sector_size / 512); | |
596 | ||
597 | if (unlikely(sdp->last_sector_bug && block + this_count > threshold)) { | |
598 | if (block < threshold) { | |
599 | /* Access up to the threshold but not beyond */ | |
600 | this_count = threshold - block; | |
601 | } else { | |
602 | /* Access only a single hardware sector */ | |
603 | this_count = sdp->sector_size / 512; | |
604 | } | |
605 | } | |
a0899d4d | 606 | |
fa0d34be MP |
607 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, "block=%llu\n", |
608 | (unsigned long long)block)); | |
1da177e4 LT |
609 | |
610 | /* | |
611 | * If we have a 1K hardware sectorsize, prevent access to single | |
612 | * 512 byte sectors. In theory we could handle this - in fact | |
613 | * the scsi cdrom driver must be able to handle this because | |
614 | * we typically use 1K blocksizes, and cdroms typically have | |
615 | * 2K hardware sectorsizes. Of course, things are simpler | |
616 | * with the cdrom, since it is read-only. For performance | |
617 | * reasons, the filesystems should be able to handle this | |
618 | * and not force the scsi disk driver to use bounce buffers | |
619 | * for this. | |
620 | */ | |
621 | if (sdp->sector_size == 1024) { | |
83096ebf | 622 | if ((block & 1) || (blk_rq_sectors(rq) & 1)) { |
e73aec82 MP |
623 | scmd_printk(KERN_ERR, SCpnt, |
624 | "Bad block number requested\n"); | |
7f9a6bc4 | 625 | goto out; |
1da177e4 LT |
626 | } else { |
627 | block = block >> 1; | |
628 | this_count = this_count >> 1; | |
629 | } | |
630 | } | |
631 | if (sdp->sector_size == 2048) { | |
83096ebf | 632 | if ((block & 3) || (blk_rq_sectors(rq) & 3)) { |
e73aec82 MP |
633 | scmd_printk(KERN_ERR, SCpnt, |
634 | "Bad block number requested\n"); | |
7f9a6bc4 | 635 | goto out; |
1da177e4 LT |
636 | } else { |
637 | block = block >> 2; | |
638 | this_count = this_count >> 2; | |
639 | } | |
640 | } | |
641 | if (sdp->sector_size == 4096) { | |
83096ebf | 642 | if ((block & 7) || (blk_rq_sectors(rq) & 7)) { |
e73aec82 MP |
643 | scmd_printk(KERN_ERR, SCpnt, |
644 | "Bad block number requested\n"); | |
7f9a6bc4 | 645 | goto out; |
1da177e4 LT |
646 | } else { |
647 | block = block >> 3; | |
648 | this_count = this_count >> 3; | |
649 | } | |
650 | } | |
651 | if (rq_data_dir(rq) == WRITE) { | |
652 | if (!sdp->writeable) { | |
7f9a6bc4 | 653 | goto out; |
1da177e4 LT |
654 | } |
655 | SCpnt->cmnd[0] = WRITE_6; | |
656 | SCpnt->sc_data_direction = DMA_TO_DEVICE; | |
af55ff67 MP |
657 | |
658 | if (blk_integrity_rq(rq) && | |
659 | sd_dif_prepare(rq, block, sdp->sector_size) == -EIO) | |
660 | goto out; | |
661 | ||
1da177e4 LT |
662 | } else if (rq_data_dir(rq) == READ) { |
663 | SCpnt->cmnd[0] = READ_6; | |
664 | SCpnt->sc_data_direction = DMA_FROM_DEVICE; | |
665 | } else { | |
e73aec82 | 666 | scmd_printk(KERN_ERR, SCpnt, "Unknown command %x\n", rq->cmd_flags); |
7f9a6bc4 | 667 | goto out; |
1da177e4 LT |
668 | } |
669 | ||
fa0d34be | 670 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
83096ebf | 671 | "%s %d/%u 512 byte blocks.\n", |
fa0d34be MP |
672 | (rq_data_dir(rq) == WRITE) ? |
673 | "writing" : "reading", this_count, | |
83096ebf | 674 | blk_rq_sectors(rq))); |
1da177e4 | 675 | |
af55ff67 | 676 | /* Set RDPROTECT/WRPROTECT if disk is formatted with DIF */ |
bd623e79 MP |
677 | host_dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type); |
678 | if (host_dif) | |
4e7392ec | 679 | protect = 1 << 5; |
af55ff67 | 680 | else |
4e7392ec MP |
681 | protect = 0; |
682 | ||
683 | if (host_dif == SD_DIF_TYPE2_PROTECTION) { | |
684 | SCpnt->cmnd = mempool_alloc(sd_cdb_pool, GFP_ATOMIC); | |
685 | ||
686 | if (unlikely(SCpnt->cmnd == NULL)) { | |
687 | ret = BLKPREP_DEFER; | |
688 | goto out; | |
689 | } | |
af55ff67 | 690 | |
4e7392ec MP |
691 | SCpnt->cmd_len = SD_EXT_CDB_SIZE; |
692 | memset(SCpnt->cmnd, 0, SCpnt->cmd_len); | |
693 | SCpnt->cmnd[0] = VARIABLE_LENGTH_CMD; | |
694 | SCpnt->cmnd[7] = 0x18; | |
695 | SCpnt->cmnd[9] = (rq_data_dir(rq) == READ) ? READ_32 : WRITE_32; | |
33659ebb | 696 | SCpnt->cmnd[10] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
4e7392ec MP |
697 | |
698 | /* LBA */ | |
699 | SCpnt->cmnd[12] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0; | |
700 | SCpnt->cmnd[13] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0; | |
701 | SCpnt->cmnd[14] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0; | |
702 | SCpnt->cmnd[15] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0; | |
703 | SCpnt->cmnd[16] = (unsigned char) (block >> 24) & 0xff; | |
704 | SCpnt->cmnd[17] = (unsigned char) (block >> 16) & 0xff; | |
705 | SCpnt->cmnd[18] = (unsigned char) (block >> 8) & 0xff; | |
706 | SCpnt->cmnd[19] = (unsigned char) block & 0xff; | |
707 | ||
708 | /* Expected Indirect LBA */ | |
709 | SCpnt->cmnd[20] = (unsigned char) (block >> 24) & 0xff; | |
710 | SCpnt->cmnd[21] = (unsigned char) (block >> 16) & 0xff; | |
711 | SCpnt->cmnd[22] = (unsigned char) (block >> 8) & 0xff; | |
712 | SCpnt->cmnd[23] = (unsigned char) block & 0xff; | |
713 | ||
714 | /* Transfer length */ | |
715 | SCpnt->cmnd[28] = (unsigned char) (this_count >> 24) & 0xff; | |
716 | SCpnt->cmnd[29] = (unsigned char) (this_count >> 16) & 0xff; | |
717 | SCpnt->cmnd[30] = (unsigned char) (this_count >> 8) & 0xff; | |
718 | SCpnt->cmnd[31] = (unsigned char) this_count & 0xff; | |
719 | } else if (block > 0xffffffff) { | |
1da177e4 | 720 | SCpnt->cmnd[0] += READ_16 - READ_6; |
33659ebb | 721 | SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
1da177e4 LT |
722 | SCpnt->cmnd[2] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0; |
723 | SCpnt->cmnd[3] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0; | |
724 | SCpnt->cmnd[4] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0; | |
725 | SCpnt->cmnd[5] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0; | |
726 | SCpnt->cmnd[6] = (unsigned char) (block >> 24) & 0xff; | |
727 | SCpnt->cmnd[7] = (unsigned char) (block >> 16) & 0xff; | |
728 | SCpnt->cmnd[8] = (unsigned char) (block >> 8) & 0xff; | |
729 | SCpnt->cmnd[9] = (unsigned char) block & 0xff; | |
730 | SCpnt->cmnd[10] = (unsigned char) (this_count >> 24) & 0xff; | |
731 | SCpnt->cmnd[11] = (unsigned char) (this_count >> 16) & 0xff; | |
732 | SCpnt->cmnd[12] = (unsigned char) (this_count >> 8) & 0xff; | |
733 | SCpnt->cmnd[13] = (unsigned char) this_count & 0xff; | |
734 | SCpnt->cmnd[14] = SCpnt->cmnd[15] = 0; | |
735 | } else if ((this_count > 0xff) || (block > 0x1fffff) || | |
af55ff67 | 736 | scsi_device_protection(SCpnt->device) || |
1da177e4 LT |
737 | SCpnt->device->use_10_for_rw) { |
738 | if (this_count > 0xffff) | |
739 | this_count = 0xffff; | |
740 | ||
741 | SCpnt->cmnd[0] += READ_10 - READ_6; | |
33659ebb | 742 | SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
1da177e4 LT |
743 | SCpnt->cmnd[2] = (unsigned char) (block >> 24) & 0xff; |
744 | SCpnt->cmnd[3] = (unsigned char) (block >> 16) & 0xff; | |
745 | SCpnt->cmnd[4] = (unsigned char) (block >> 8) & 0xff; | |
746 | SCpnt->cmnd[5] = (unsigned char) block & 0xff; | |
747 | SCpnt->cmnd[6] = SCpnt->cmnd[9] = 0; | |
748 | SCpnt->cmnd[7] = (unsigned char) (this_count >> 8) & 0xff; | |
749 | SCpnt->cmnd[8] = (unsigned char) this_count & 0xff; | |
750 | } else { | |
33659ebb | 751 | if (unlikely(rq->cmd_flags & REQ_FUA)) { |
007365ad TH |
752 | /* |
753 | * This happens only if this drive failed | |
754 | * 10byte rw command with ILLEGAL_REQUEST | |
755 | * during operation and thus turned off | |
756 | * use_10_for_rw. | |
757 | */ | |
e73aec82 MP |
758 | scmd_printk(KERN_ERR, SCpnt, |
759 | "FUA write on READ/WRITE(6) drive\n"); | |
7f9a6bc4 | 760 | goto out; |
007365ad TH |
761 | } |
762 | ||
1da177e4 LT |
763 | SCpnt->cmnd[1] |= (unsigned char) ((block >> 16) & 0x1f); |
764 | SCpnt->cmnd[2] = (unsigned char) ((block >> 8) & 0xff); | |
765 | SCpnt->cmnd[3] = (unsigned char) block & 0xff; | |
766 | SCpnt->cmnd[4] = (unsigned char) this_count; | |
767 | SCpnt->cmnd[5] = 0; | |
768 | } | |
30b0c37b | 769 | SCpnt->sdb.length = this_count * sdp->sector_size; |
1da177e4 | 770 | |
af55ff67 | 771 | /* If DIF or DIX is enabled, tell HBA how to handle request */ |
bd623e79 | 772 | if (host_dif || scsi_prot_sg_count(SCpnt)) |
35e1a5d9 | 773 | sd_prot_op(SCpnt, host_dif); |
af55ff67 | 774 | |
1da177e4 LT |
775 | /* |
776 | * We shouldn't disconnect in the middle of a sector, so with a dumb | |
777 | * host adapter, it's safe to assume that we can at least transfer | |
778 | * this many bytes between each connect / disconnect. | |
779 | */ | |
780 | SCpnt->transfersize = sdp->sector_size; | |
781 | SCpnt->underflow = this_count << 9; | |
782 | SCpnt->allowed = SD_MAX_RETRIES; | |
1da177e4 | 783 | |
1da177e4 LT |
784 | /* |
785 | * This indicates that the command is ready from our end to be | |
786 | * queued. | |
787 | */ | |
7f9a6bc4 JB |
788 | ret = BLKPREP_OK; |
789 | out: | |
790 | return scsi_prep_return(q, rq, ret); | |
1da177e4 LT |
791 | } |
792 | ||
793 | /** | |
794 | * sd_open - open a scsi disk device | |
795 | * @inode: only i_rdev member may be used | |
796 | * @filp: only f_mode and f_flags may be used | |
797 | * | |
798 | * Returns 0 if successful. Returns a negated errno value in case | |
799 | * of error. | |
800 | * | |
801 | * Note: This can be called from a user context (e.g. fsck(1) ) | |
802 | * or from within the kernel (e.g. as a result of a mount(1) ). | |
803 | * In the latter case @inode and @filp carry an abridged amount | |
804 | * of information as noted above. | |
409f3499 AB |
805 | * |
806 | * Locking: called with bdev->bd_mutex held. | |
1da177e4 | 807 | **/ |
0338e291 | 808 | static int sd_open(struct block_device *bdev, fmode_t mode) |
1da177e4 | 809 | { |
0338e291 | 810 | struct scsi_disk *sdkp = scsi_disk_get(bdev->bd_disk); |
1da177e4 LT |
811 | struct scsi_device *sdev; |
812 | int retval; | |
813 | ||
0338e291 | 814 | if (!sdkp) |
1da177e4 LT |
815 | return -ENXIO; |
816 | ||
fa0d34be | 817 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_open\n")); |
1da177e4 LT |
818 | |
819 | sdev = sdkp->device; | |
820 | ||
478a8a05 AS |
821 | retval = scsi_autopm_get_device(sdev); |
822 | if (retval) | |
823 | goto error_autopm; | |
824 | ||
1da177e4 LT |
825 | /* |
826 | * If the device is in error recovery, wait until it is done. | |
827 | * If the device is offline, then disallow any access to it. | |
828 | */ | |
829 | retval = -ENXIO; | |
830 | if (!scsi_block_when_processing_errors(sdev)) | |
831 | goto error_out; | |
832 | ||
833 | if (sdev->removable || sdkp->write_prot) | |
0338e291 | 834 | check_disk_change(bdev); |
1da177e4 LT |
835 | |
836 | /* | |
837 | * If the drive is empty, just let the open fail. | |
838 | */ | |
839 | retval = -ENOMEDIUM; | |
0338e291 | 840 | if (sdev->removable && !sdkp->media_present && !(mode & FMODE_NDELAY)) |
1da177e4 LT |
841 | goto error_out; |
842 | ||
843 | /* | |
844 | * If the device has the write protect tab set, have the open fail | |
845 | * if the user expects to be able to write to the thing. | |
846 | */ | |
847 | retval = -EROFS; | |
0338e291 | 848 | if (sdkp->write_prot && (mode & FMODE_WRITE)) |
1da177e4 LT |
849 | goto error_out; |
850 | ||
851 | /* | |
852 | * It is possible that the disk changing stuff resulted in | |
853 | * the device being taken offline. If this is the case, | |
854 | * report this to the user, and don't pretend that the | |
855 | * open actually succeeded. | |
856 | */ | |
857 | retval = -ENXIO; | |
858 | if (!scsi_device_online(sdev)) | |
859 | goto error_out; | |
860 | ||
409f3499 | 861 | if ((atomic_inc_return(&sdkp->openers) == 1) && sdev->removable) { |
1da177e4 LT |
862 | if (scsi_block_when_processing_errors(sdev)) |
863 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT); | |
864 | } | |
865 | ||
866 | return 0; | |
867 | ||
868 | error_out: | |
478a8a05 AS |
869 | scsi_autopm_put_device(sdev); |
870 | error_autopm: | |
1da177e4 LT |
871 | scsi_disk_put(sdkp); |
872 | return retval; | |
873 | } | |
874 | ||
875 | /** | |
876 | * sd_release - invoked when the (last) close(2) is called on this | |
877 | * scsi disk. | |
878 | * @inode: only i_rdev member may be used | |
879 | * @filp: only f_mode and f_flags may be used | |
880 | * | |
881 | * Returns 0. | |
882 | * | |
883 | * Note: may block (uninterruptible) if error recovery is underway | |
884 | * on this disk. | |
409f3499 AB |
885 | * |
886 | * Locking: called with bdev->bd_mutex held. | |
1da177e4 | 887 | **/ |
0338e291 | 888 | static int sd_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 889 | { |
1da177e4 LT |
890 | struct scsi_disk *sdkp = scsi_disk(disk); |
891 | struct scsi_device *sdev = sdkp->device; | |
892 | ||
56937f7b | 893 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_release\n")); |
1da177e4 | 894 | |
7e443312 | 895 | if (atomic_dec_return(&sdkp->openers) == 0 && sdev->removable) { |
1da177e4 LT |
896 | if (scsi_block_when_processing_errors(sdev)) |
897 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW); | |
898 | } | |
899 | ||
900 | /* | |
901 | * XXX and what if there are packets in flight and this close() | |
902 | * XXX is followed by a "rmmod sd_mod"? | |
903 | */ | |
478a8a05 AS |
904 | |
905 | scsi_autopm_put_device(sdev); | |
1da177e4 LT |
906 | scsi_disk_put(sdkp); |
907 | return 0; | |
908 | } | |
909 | ||
a885c8c4 | 910 | static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
1da177e4 LT |
911 | { |
912 | struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk); | |
913 | struct scsi_device *sdp = sdkp->device; | |
914 | struct Scsi_Host *host = sdp->host; | |
915 | int diskinfo[4]; | |
916 | ||
917 | /* default to most commonly used values */ | |
918 | diskinfo[0] = 0x40; /* 1 << 6 */ | |
919 | diskinfo[1] = 0x20; /* 1 << 5 */ | |
920 | diskinfo[2] = sdkp->capacity >> 11; | |
921 | ||
922 | /* override with calculated, extended default, or driver values */ | |
923 | if (host->hostt->bios_param) | |
924 | host->hostt->bios_param(sdp, bdev, sdkp->capacity, diskinfo); | |
925 | else | |
926 | scsicam_bios_param(bdev, sdkp->capacity, diskinfo); | |
927 | ||
a885c8c4 CH |
928 | geo->heads = diskinfo[0]; |
929 | geo->sectors = diskinfo[1]; | |
930 | geo->cylinders = diskinfo[2]; | |
1da177e4 LT |
931 | return 0; |
932 | } | |
933 | ||
934 | /** | |
935 | * sd_ioctl - process an ioctl | |
936 | * @inode: only i_rdev/i_bdev members may be used | |
937 | * @filp: only f_mode and f_flags may be used | |
938 | * @cmd: ioctl command number | |
939 | * @arg: this is third argument given to ioctl(2) system call. | |
940 | * Often contains a pointer. | |
941 | * | |
942 | * Returns 0 if successful (some ioctls return postive numbers on | |
943 | * success as well). Returns a negated errno value in case of error. | |
944 | * | |
945 | * Note: most ioctls are forward onto the block subsystem or further | |
3a4fa0a2 | 946 | * down in the scsi subsystem. |
1da177e4 | 947 | **/ |
0338e291 | 948 | static int sd_ioctl(struct block_device *bdev, fmode_t mode, |
1da177e4 LT |
949 | unsigned int cmd, unsigned long arg) |
950 | { | |
1da177e4 LT |
951 | struct gendisk *disk = bdev->bd_disk; |
952 | struct scsi_device *sdp = scsi_disk(disk)->device; | |
953 | void __user *p = (void __user *)arg; | |
954 | int error; | |
955 | ||
956 | SCSI_LOG_IOCTL(1, printk("sd_ioctl: disk=%s, cmd=0x%x\n", | |
957 | disk->disk_name, cmd)); | |
958 | ||
959 | /* | |
960 | * If we are in the middle of error recovery, don't let anyone | |
961 | * else try and use this device. Also, if error recovery fails, it | |
962 | * may try and take the device offline, in which case all further | |
963 | * access to the device is prohibited. | |
964 | */ | |
83ff6fe8 | 965 | error = scsi_nonblockable_ioctl(sdp, cmd, p, |
fd4ce1ac | 966 | (mode & FMODE_NDELAY) != 0); |
1da177e4 | 967 | if (!scsi_block_when_processing_errors(sdp) || !error) |
8a6cfeb6 | 968 | goto out; |
1da177e4 | 969 | |
1da177e4 LT |
970 | /* |
971 | * Send SCSI addressing ioctls directly to mid level, send other | |
972 | * ioctls to block level and then onto mid level if they can't be | |
973 | * resolved. | |
974 | */ | |
975 | switch (cmd) { | |
976 | case SCSI_IOCTL_GET_IDLUN: | |
977 | case SCSI_IOCTL_GET_BUS_NUMBER: | |
8a6cfeb6 AB |
978 | error = scsi_ioctl(sdp, cmd, p); |
979 | break; | |
1da177e4 | 980 | default: |
0338e291 | 981 | error = scsi_cmd_ioctl(disk->queue, disk, mode, cmd, p); |
1da177e4 | 982 | if (error != -ENOTTY) |
8a6cfeb6 AB |
983 | break; |
984 | error = scsi_ioctl(sdp, cmd, p); | |
985 | break; | |
1da177e4 | 986 | } |
8a6cfeb6 | 987 | out: |
8a6cfeb6 | 988 | return error; |
1da177e4 LT |
989 | } |
990 | ||
991 | static void set_media_not_present(struct scsi_disk *sdkp) | |
992 | { | |
993 | sdkp->media_present = 0; | |
994 | sdkp->capacity = 0; | |
995 | sdkp->device->changed = 1; | |
996 | } | |
997 | ||
998 | /** | |
999 | * sd_media_changed - check if our medium changed | |
1000 | * @disk: kernel device descriptor | |
1001 | * | |
1002 | * Returns 0 if not applicable or no change; 1 if change | |
1003 | * | |
1004 | * Note: this function is invoked from the block subsystem. | |
1005 | **/ | |
1006 | static int sd_media_changed(struct gendisk *disk) | |
1007 | { | |
1008 | struct scsi_disk *sdkp = scsi_disk(disk); | |
1009 | struct scsi_device *sdp = sdkp->device; | |
001aac25 | 1010 | struct scsi_sense_hdr *sshdr = NULL; |
1da177e4 LT |
1011 | int retval; |
1012 | ||
fa0d34be | 1013 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_media_changed\n")); |
1da177e4 LT |
1014 | |
1015 | if (!sdp->removable) | |
1016 | return 0; | |
1017 | ||
1018 | /* | |
1019 | * If the device is offline, don't send any commands - just pretend as | |
1020 | * if the command failed. If the device ever comes back online, we | |
1021 | * can deal with it then. It is only because of unrecoverable errors | |
1022 | * that we would ever take a device offline in the first place. | |
1023 | */ | |
285e9670 KS |
1024 | if (!scsi_device_online(sdp)) { |
1025 | set_media_not_present(sdkp); | |
285e9670 KS |
1026 | goto out; |
1027 | } | |
1da177e4 LT |
1028 | |
1029 | /* | |
1030 | * Using TEST_UNIT_READY enables differentiation between drive with | |
1031 | * no cartridge loaded - NOT READY, drive with changed cartridge - | |
1032 | * UNIT ATTENTION, or with same cartridge - GOOD STATUS. | |
1033 | * | |
1034 | * Drives that auto spin down. eg iomega jaz 1G, will be started | |
1035 | * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever | |
1036 | * sd_revalidate() is called. | |
1037 | */ | |
1038 | retval = -ENODEV; | |
285e9670 | 1039 | |
001aac25 JB |
1040 | if (scsi_block_when_processing_errors(sdp)) { |
1041 | sshdr = kzalloc(sizeof(*sshdr), GFP_KERNEL); | |
1042 | retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, SD_MAX_RETRIES, | |
1043 | sshdr); | |
1044 | } | |
1da177e4 LT |
1045 | |
1046 | /* | |
1047 | * Unable to test, unit probably not ready. This usually | |
1048 | * means there is no disc in the drive. Mark as changed, | |
1049 | * and we will figure it out later once the drive is | |
1050 | * available again. | |
1051 | */ | |
001aac25 JB |
1052 | if (retval || (scsi_sense_valid(sshdr) && |
1053 | /* 0x3a is medium not present */ | |
1054 | sshdr->asc == 0x3a)) { | |
285e9670 | 1055 | set_media_not_present(sdkp); |
285e9670 KS |
1056 | goto out; |
1057 | } | |
1da177e4 LT |
1058 | |
1059 | /* | |
1060 | * For removable scsi disk we have to recognise the presence | |
1061 | * of a disk in the drive. This is kept in the struct scsi_disk | |
1062 | * struct and tested at open ! Daniel Roche (dan@lectra.fr) | |
1063 | */ | |
1064 | sdkp->media_present = 1; | |
1065 | ||
285e9670 | 1066 | out: |
3ff5588d AS |
1067 | /* |
1068 | * Report a media change under the following conditions: | |
1069 | * | |
1070 | * Medium is present now and wasn't present before. | |
1071 | * Medium wasn't present before and is present now. | |
1072 | * Medium was present at all times, but it changed while | |
1073 | * we weren't looking (sdp->changed is set). | |
1074 | * | |
1075 | * If there was no medium before and there is no medium now then | |
1076 | * don't report a change, even if a medium was inserted and removed | |
1077 | * while we weren't looking. | |
1078 | */ | |
1079 | retval = (sdkp->media_present != sdkp->previous_state || | |
1080 | (sdkp->media_present && sdp->changed)); | |
1081 | if (retval) | |
285e9670 | 1082 | sdev_evt_send_simple(sdp, SDEV_EVT_MEDIA_CHANGE, GFP_KERNEL); |
3ff5588d AS |
1083 | sdkp->previous_state = sdkp->media_present; |
1084 | ||
1085 | /* sdp->changed indicates medium was changed or is not present */ | |
1086 | sdp->changed = !sdkp->media_present; | |
001aac25 | 1087 | kfree(sshdr); |
1da177e4 | 1088 | return retval; |
1da177e4 LT |
1089 | } |
1090 | ||
e73aec82 | 1091 | static int sd_sync_cache(struct scsi_disk *sdkp) |
1da177e4 | 1092 | { |
1da177e4 | 1093 | int retries, res; |
e73aec82 | 1094 | struct scsi_device *sdp = sdkp->device; |
ea73a9f2 | 1095 | struct scsi_sense_hdr sshdr; |
1da177e4 LT |
1096 | |
1097 | if (!scsi_device_online(sdp)) | |
1098 | return -ENODEV; | |
1099 | ||
1da177e4 | 1100 | |
1da177e4 LT |
1101 | for (retries = 3; retries > 0; --retries) { |
1102 | unsigned char cmd[10] = { 0 }; | |
1103 | ||
1104 | cmd[0] = SYNCHRONIZE_CACHE; | |
1105 | /* | |
1106 | * Leave the rest of the command zero to indicate | |
1107 | * flush everything. | |
1108 | */ | |
ea73a9f2 | 1109 | res = scsi_execute_req(sdp, cmd, DMA_NONE, NULL, 0, &sshdr, |
e3b3e624 | 1110 | SD_FLUSH_TIMEOUT, SD_MAX_RETRIES, NULL); |
ea73a9f2 | 1111 | if (res == 0) |
1da177e4 LT |
1112 | break; |
1113 | } | |
1114 | ||
e73aec82 MP |
1115 | if (res) { |
1116 | sd_print_result(sdkp, res); | |
1117 | if (driver_byte(res) & DRIVER_SENSE) | |
1118 | sd_print_sense_hdr(sdkp, &sshdr); | |
1da177e4 LT |
1119 | } |
1120 | ||
3721050a TH |
1121 | if (res) |
1122 | return -EIO; | |
1123 | return 0; | |
1da177e4 LT |
1124 | } |
1125 | ||
1da177e4 LT |
1126 | static void sd_rescan(struct device *dev) |
1127 | { | |
39b7f1e2 AS |
1128 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
1129 | ||
1130 | if (sdkp) { | |
f98a8cae | 1131 | revalidate_disk(sdkp->disk); |
39b7f1e2 AS |
1132 | scsi_disk_put(sdkp); |
1133 | } | |
1da177e4 LT |
1134 | } |
1135 | ||
1136 | ||
1137 | #ifdef CONFIG_COMPAT | |
1138 | /* | |
1139 | * This gets directly called from VFS. When the ioctl | |
1140 | * is not recognized we go back to the other translation paths. | |
1141 | */ | |
0338e291 AV |
1142 | static int sd_compat_ioctl(struct block_device *bdev, fmode_t mode, |
1143 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1144 | { |
0338e291 | 1145 | struct scsi_device *sdev = scsi_disk(bdev->bd_disk)->device; |
1da177e4 LT |
1146 | |
1147 | /* | |
1148 | * If we are in the middle of error recovery, don't let anyone | |
1149 | * else try and use this device. Also, if error recovery fails, it | |
1150 | * may try and take the device offline, in which case all further | |
1151 | * access to the device is prohibited. | |
1152 | */ | |
1153 | if (!scsi_block_when_processing_errors(sdev)) | |
1154 | return -ENODEV; | |
1155 | ||
1156 | if (sdev->host->hostt->compat_ioctl) { | |
1157 | int ret; | |
1158 | ||
1159 | ret = sdev->host->hostt->compat_ioctl(sdev, cmd, (void __user *)arg); | |
1160 | ||
1161 | return ret; | |
1162 | } | |
1163 | ||
1164 | /* | |
1165 | * Let the static ioctl translation table take care of it. | |
1166 | */ | |
1167 | return -ENOIOCTLCMD; | |
1168 | } | |
1169 | #endif | |
1170 | ||
83d5cde4 | 1171 | static const struct block_device_operations sd_fops = { |
1da177e4 | 1172 | .owner = THIS_MODULE, |
0338e291 AV |
1173 | .open = sd_open, |
1174 | .release = sd_release, | |
8a6cfeb6 | 1175 | .ioctl = sd_ioctl, |
a885c8c4 | 1176 | .getgeo = sd_getgeo, |
1da177e4 | 1177 | #ifdef CONFIG_COMPAT |
0338e291 | 1178 | .compat_ioctl = sd_compat_ioctl, |
1da177e4 LT |
1179 | #endif |
1180 | .media_changed = sd_media_changed, | |
1181 | .revalidate_disk = sd_revalidate_disk, | |
72ec24bd | 1182 | .unlock_native_capacity = sd_unlock_native_capacity, |
1da177e4 LT |
1183 | }; |
1184 | ||
af55ff67 MP |
1185 | static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd) |
1186 | { | |
83096ebf TH |
1187 | u64 start_lba = blk_rq_pos(scmd->request); |
1188 | u64 end_lba = blk_rq_pos(scmd->request) + (scsi_bufflen(scmd) / 512); | |
af55ff67 MP |
1189 | u64 bad_lba; |
1190 | int info_valid; | |
1191 | ||
33659ebb | 1192 | if (scmd->request->cmd_type != REQ_TYPE_FS) |
af55ff67 MP |
1193 | return 0; |
1194 | ||
1195 | info_valid = scsi_get_sense_info_fld(scmd->sense_buffer, | |
1196 | SCSI_SENSE_BUFFERSIZE, | |
1197 | &bad_lba); | |
1198 | if (!info_valid) | |
1199 | return 0; | |
1200 | ||
1201 | if (scsi_bufflen(scmd) <= scmd->device->sector_size) | |
1202 | return 0; | |
1203 | ||
1204 | if (scmd->device->sector_size < 512) { | |
1205 | /* only legitimate sector_size here is 256 */ | |
1206 | start_lba <<= 1; | |
1207 | end_lba <<= 1; | |
1208 | } else { | |
1209 | /* be careful ... don't want any overflows */ | |
1210 | u64 factor = scmd->device->sector_size / 512; | |
1211 | do_div(start_lba, factor); | |
1212 | do_div(end_lba, factor); | |
1213 | } | |
1214 | ||
1215 | /* The bad lba was reported incorrectly, we have no idea where | |
1216 | * the error is. | |
1217 | */ | |
1218 | if (bad_lba < start_lba || bad_lba >= end_lba) | |
1219 | return 0; | |
1220 | ||
1221 | /* This computation should always be done in terms of | |
1222 | * the resolution of the device's medium. | |
1223 | */ | |
1224 | return (bad_lba - start_lba) * scmd->device->sector_size; | |
1225 | } | |
1226 | ||
1da177e4 | 1227 | /** |
7b3d9545 | 1228 | * sd_done - bottom half handler: called when the lower level |
1da177e4 LT |
1229 | * driver has completed (successfully or otherwise) a scsi command. |
1230 | * @SCpnt: mid-level's per command structure. | |
1231 | * | |
1232 | * Note: potentially run from within an ISR. Must not block. | |
1233 | **/ | |
7b3d9545 | 1234 | static int sd_done(struct scsi_cmnd *SCpnt) |
1da177e4 LT |
1235 | { |
1236 | int result = SCpnt->result; | |
af55ff67 | 1237 | unsigned int good_bytes = result ? 0 : scsi_bufflen(SCpnt); |
1da177e4 | 1238 | struct scsi_sense_hdr sshdr; |
4e7392ec | 1239 | struct scsi_disk *sdkp = scsi_disk(SCpnt->request->rq_disk); |
1da177e4 LT |
1240 | int sense_valid = 0; |
1241 | int sense_deferred = 0; | |
1da177e4 | 1242 | |
6a32a8ae FT |
1243 | if (SCpnt->request->cmd_flags & REQ_DISCARD) { |
1244 | if (!result) | |
1245 | scsi_set_resid(SCpnt, 0); | |
1246 | return good_bytes; | |
1247 | } | |
1248 | ||
1da177e4 LT |
1249 | if (result) { |
1250 | sense_valid = scsi_command_normalize_sense(SCpnt, &sshdr); | |
1251 | if (sense_valid) | |
1252 | sense_deferred = scsi_sense_is_deferred(&sshdr); | |
1253 | } | |
1da177e4 | 1254 | #ifdef CONFIG_SCSI_LOGGING |
fa0d34be | 1255 | SCSI_LOG_HLCOMPLETE(1, scsi_print_result(SCpnt)); |
1da177e4 | 1256 | if (sense_valid) { |
fa0d34be | 1257 | SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO, SCpnt, |
7b3d9545 | 1258 | "sd_done: sb[respc,sk,asc," |
fa0d34be MP |
1259 | "ascq]=%x,%x,%x,%x\n", |
1260 | sshdr.response_code, | |
1261 | sshdr.sense_key, sshdr.asc, | |
1262 | sshdr.ascq)); | |
1da177e4 LT |
1263 | } |
1264 | #endif | |
03aba2f7 LT |
1265 | if (driver_byte(result) != DRIVER_SENSE && |
1266 | (!sense_valid || sense_deferred)) | |
1267 | goto out; | |
1268 | ||
1269 | switch (sshdr.sense_key) { | |
1270 | case HARDWARE_ERROR: | |
1271 | case MEDIUM_ERROR: | |
af55ff67 | 1272 | good_bytes = sd_completed_bytes(SCpnt); |
03aba2f7 LT |
1273 | break; |
1274 | case RECOVERED_ERROR: | |
af55ff67 MP |
1275 | good_bytes = scsi_bufflen(SCpnt); |
1276 | break; | |
10dab226 JW |
1277 | case NO_SENSE: |
1278 | /* This indicates a false check condition, so ignore it. An | |
1279 | * unknown amount of data was transferred so treat it as an | |
1280 | * error. | |
1281 | */ | |
1282 | scsi_print_sense("sd", SCpnt); | |
1283 | SCpnt->result = 0; | |
1284 | memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); | |
1285 | break; | |
fa4698fc MP |
1286 | case ABORTED_COMMAND: /* DIF: Target detected corruption */ |
1287 | case ILLEGAL_REQUEST: /* DIX: Host detected corruption */ | |
1288 | if (sshdr.asc == 0x10) | |
af55ff67 | 1289 | good_bytes = sd_completed_bytes(SCpnt); |
03aba2f7 LT |
1290 | break; |
1291 | default: | |
1292 | break; | |
1da177e4 | 1293 | } |
03aba2f7 | 1294 | out: |
af55ff67 MP |
1295 | if (rq_data_dir(SCpnt->request) == READ && scsi_prot_sg_count(SCpnt)) |
1296 | sd_dif_complete(SCpnt, good_bytes); | |
1297 | ||
4e7392ec | 1298 | if (scsi_host_dif_capable(sdkp->device->host, sdkp->protection_type) |
77c9cfc5 MP |
1299 | == SD_DIF_TYPE2_PROTECTION && SCpnt->cmnd != SCpnt->request->cmd) { |
1300 | ||
1301 | /* We have to print a failed command here as the | |
1302 | * extended CDB gets freed before scsi_io_completion() | |
1303 | * is called. | |
1304 | */ | |
1305 | if (result) | |
1306 | scsi_print_command(SCpnt); | |
1307 | ||
4e7392ec | 1308 | mempool_free(SCpnt->cmnd, sd_cdb_pool); |
77c9cfc5 MP |
1309 | SCpnt->cmnd = NULL; |
1310 | SCpnt->cmd_len = 0; | |
1311 | } | |
4e7392ec | 1312 | |
7b3d9545 | 1313 | return good_bytes; |
1da177e4 LT |
1314 | } |
1315 | ||
ea73a9f2 JB |
1316 | static int media_not_present(struct scsi_disk *sdkp, |
1317 | struct scsi_sense_hdr *sshdr) | |
1da177e4 | 1318 | { |
1da177e4 | 1319 | |
ea73a9f2 | 1320 | if (!scsi_sense_valid(sshdr)) |
1da177e4 LT |
1321 | return 0; |
1322 | /* not invoked for commands that could return deferred errors */ | |
ea73a9f2 JB |
1323 | if (sshdr->sense_key != NOT_READY && |
1324 | sshdr->sense_key != UNIT_ATTENTION) | |
1325 | return 0; | |
1326 | if (sshdr->asc != 0x3A) /* medium not present */ | |
1327 | return 0; | |
1328 | ||
1da177e4 LT |
1329 | set_media_not_present(sdkp); |
1330 | return 1; | |
1331 | } | |
1332 | ||
1333 | /* | |
1334 | * spinup disk - called only in sd_revalidate_disk() | |
1335 | */ | |
1336 | static void | |
e73aec82 | 1337 | sd_spinup_disk(struct scsi_disk *sdkp) |
ea73a9f2 | 1338 | { |
1da177e4 | 1339 | unsigned char cmd[10]; |
4451e472 | 1340 | unsigned long spintime_expire = 0; |
1da177e4 LT |
1341 | int retries, spintime; |
1342 | unsigned int the_result; | |
1343 | struct scsi_sense_hdr sshdr; | |
1344 | int sense_valid = 0; | |
1345 | ||
1346 | spintime = 0; | |
1347 | ||
1348 | /* Spin up drives, as required. Only do this at boot time */ | |
1349 | /* Spinup needs to be done for module loads too. */ | |
1350 | do { | |
1351 | retries = 0; | |
1352 | ||
1353 | do { | |
1354 | cmd[0] = TEST_UNIT_READY; | |
1355 | memset((void *) &cmd[1], 0, 9); | |
1356 | ||
ea73a9f2 JB |
1357 | the_result = scsi_execute_req(sdkp->device, cmd, |
1358 | DMA_NONE, NULL, 0, | |
1359 | &sshdr, SD_TIMEOUT, | |
f4f4e47e | 1360 | SD_MAX_RETRIES, NULL); |
1da177e4 | 1361 | |
b4d38e38 AS |
1362 | /* |
1363 | * If the drive has indicated to us that it | |
1364 | * doesn't have any media in it, don't bother | |
1365 | * with any more polling. | |
1366 | */ | |
1367 | if (media_not_present(sdkp, &sshdr)) | |
1368 | return; | |
1369 | ||
1da177e4 | 1370 | if (the_result) |
ea73a9f2 | 1371 | sense_valid = scsi_sense_valid(&sshdr); |
1da177e4 LT |
1372 | retries++; |
1373 | } while (retries < 3 && | |
1374 | (!scsi_status_is_good(the_result) || | |
1375 | ((driver_byte(the_result) & DRIVER_SENSE) && | |
1376 | sense_valid && sshdr.sense_key == UNIT_ATTENTION))); | |
1377 | ||
1da177e4 LT |
1378 | if ((driver_byte(the_result) & DRIVER_SENSE) == 0) { |
1379 | /* no sense, TUR either succeeded or failed | |
1380 | * with a status error */ | |
e73aec82 MP |
1381 | if(!spintime && !scsi_status_is_good(the_result)) { |
1382 | sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n"); | |
1383 | sd_print_result(sdkp, the_result); | |
1384 | } | |
1da177e4 LT |
1385 | break; |
1386 | } | |
1387 | ||
1388 | /* | |
1389 | * The device does not want the automatic start to be issued. | |
1390 | */ | |
33dd6f92 | 1391 | if (sdkp->device->no_start_on_add) |
1da177e4 | 1392 | break; |
1da177e4 | 1393 | |
33dd6f92 MW |
1394 | if (sense_valid && sshdr.sense_key == NOT_READY) { |
1395 | if (sshdr.asc == 4 && sshdr.ascq == 3) | |
1396 | break; /* manual intervention required */ | |
1397 | if (sshdr.asc == 4 && sshdr.ascq == 0xb) | |
1398 | break; /* standby */ | |
1399 | if (sshdr.asc == 4 && sshdr.ascq == 0xc) | |
1400 | break; /* unavailable */ | |
1401 | /* | |
1402 | * Issue command to spin up drive when not ready | |
1403 | */ | |
1da177e4 | 1404 | if (!spintime) { |
e73aec82 | 1405 | sd_printk(KERN_NOTICE, sdkp, "Spinning up disk..."); |
1da177e4 LT |
1406 | cmd[0] = START_STOP; |
1407 | cmd[1] = 1; /* Return immediately */ | |
1408 | memset((void *) &cmd[2], 0, 8); | |
1409 | cmd[4] = 1; /* Start spin cycle */ | |
d2886ea3 SR |
1410 | if (sdkp->device->start_stop_pwr_cond) |
1411 | cmd[4] |= 1 << 4; | |
ea73a9f2 JB |
1412 | scsi_execute_req(sdkp->device, cmd, DMA_NONE, |
1413 | NULL, 0, &sshdr, | |
f4f4e47e FT |
1414 | SD_TIMEOUT, SD_MAX_RETRIES, |
1415 | NULL); | |
4451e472 AS |
1416 | spintime_expire = jiffies + 100 * HZ; |
1417 | spintime = 1; | |
1da177e4 | 1418 | } |
1da177e4 LT |
1419 | /* Wait 1 second for next try */ |
1420 | msleep(1000); | |
1421 | printk("."); | |
4451e472 AS |
1422 | |
1423 | /* | |
1424 | * Wait for USB flash devices with slow firmware. | |
1425 | * Yes, this sense key/ASC combination shouldn't | |
1426 | * occur here. It's characteristic of these devices. | |
1427 | */ | |
1428 | } else if (sense_valid && | |
1429 | sshdr.sense_key == UNIT_ATTENTION && | |
1430 | sshdr.asc == 0x28) { | |
1431 | if (!spintime) { | |
1432 | spintime_expire = jiffies + 5 * HZ; | |
1433 | spintime = 1; | |
1434 | } | |
1435 | /* Wait 1 second for next try */ | |
1436 | msleep(1000); | |
1da177e4 LT |
1437 | } else { |
1438 | /* we don't understand the sense code, so it's | |
1439 | * probably pointless to loop */ | |
1440 | if(!spintime) { | |
e73aec82 MP |
1441 | sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n"); |
1442 | sd_print_sense_hdr(sdkp, &sshdr); | |
1da177e4 LT |
1443 | } |
1444 | break; | |
1445 | } | |
1446 | ||
4451e472 | 1447 | } while (spintime && time_before_eq(jiffies, spintime_expire)); |
1da177e4 LT |
1448 | |
1449 | if (spintime) { | |
1450 | if (scsi_status_is_good(the_result)) | |
1451 | printk("ready\n"); | |
1452 | else | |
1453 | printk("not responding...\n"); | |
1454 | } | |
1455 | } | |
1456 | ||
e0597d70 MP |
1457 | |
1458 | /* | |
1459 | * Determine whether disk supports Data Integrity Field. | |
1460 | */ | |
439d77f7 | 1461 | static void sd_read_protection_type(struct scsi_disk *sdkp, unsigned char *buffer) |
e0597d70 MP |
1462 | { |
1463 | struct scsi_device *sdp = sdkp->device; | |
1464 | u8 type; | |
1465 | ||
1466 | if (scsi_device_protection(sdp) == 0 || (buffer[12] & 1) == 0) | |
35e1a5d9 MP |
1467 | return; |
1468 | ||
1469 | type = ((buffer[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */ | |
1470 | ||
1471 | if (type == sdkp->protection_type || !sdkp->first_scan) | |
1472 | return; | |
e0597d70 | 1473 | |
be922f47 MP |
1474 | sdkp->protection_type = type; |
1475 | ||
4e7392ec | 1476 | if (type > SD_DIF_TYPE3_PROTECTION) { |
35e1a5d9 MP |
1477 | sd_printk(KERN_ERR, sdkp, "formatted with unsupported " \ |
1478 | "protection type %u. Disabling disk!\n", type); | |
1479 | sdkp->capacity = 0; | |
1480 | return; | |
e0597d70 MP |
1481 | } |
1482 | ||
35e1a5d9 MP |
1483 | if (scsi_host_dif_capable(sdp->host, type)) |
1484 | sd_printk(KERN_NOTICE, sdkp, | |
1485 | "Enabling DIF Type %u protection\n", type); | |
1486 | else | |
1487 | sd_printk(KERN_NOTICE, sdkp, | |
1488 | "Disabling DIF Type %u protection\n", type); | |
e0597d70 MP |
1489 | } |
1490 | ||
0da205e0 MW |
1491 | static void read_capacity_error(struct scsi_disk *sdkp, struct scsi_device *sdp, |
1492 | struct scsi_sense_hdr *sshdr, int sense_valid, | |
1493 | int the_result) | |
1494 | { | |
1495 | sd_print_result(sdkp, the_result); | |
1496 | if (driver_byte(the_result) & DRIVER_SENSE) | |
1497 | sd_print_sense_hdr(sdkp, sshdr); | |
1498 | else | |
1499 | sd_printk(KERN_NOTICE, sdkp, "Sense not available.\n"); | |
1500 | ||
1501 | /* | |
1502 | * Set dirty bit for removable devices if not ready - | |
1503 | * sometimes drives will not report this properly. | |
1504 | */ | |
1505 | if (sdp->removable && | |
1506 | sense_valid && sshdr->sense_key == NOT_READY) | |
1507 | sdp->changed = 1; | |
1508 | ||
1509 | /* | |
1510 | * We used to set media_present to 0 here to indicate no media | |
1511 | * in the drive, but some drives fail read capacity even with | |
1512 | * media present, so we can't do that. | |
1513 | */ | |
1514 | sdkp->capacity = 0; /* unknown mapped to zero - as usual */ | |
1515 | } | |
1516 | ||
1517 | #define RC16_LEN 32 | |
1518 | #if RC16_LEN > SD_BUF_SIZE | |
1519 | #error RC16_LEN must not be more than SD_BUF_SIZE | |
1520 | #endif | |
1521 | ||
3233ac19 JB |
1522 | #define READ_CAPACITY_RETRIES_ON_RESET 10 |
1523 | ||
0da205e0 MW |
1524 | static int read_capacity_16(struct scsi_disk *sdkp, struct scsi_device *sdp, |
1525 | unsigned char *buffer) | |
ea73a9f2 | 1526 | { |
1da177e4 | 1527 | unsigned char cmd[16]; |
1da177e4 LT |
1528 | struct scsi_sense_hdr sshdr; |
1529 | int sense_valid = 0; | |
0da205e0 | 1530 | int the_result; |
3233ac19 | 1531 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
ea09bcc9 | 1532 | unsigned int alignment; |
0da205e0 MW |
1533 | unsigned long long lba; |
1534 | unsigned sector_size; | |
1da177e4 | 1535 | |
5ce524bd HG |
1536 | if (sdp->no_read_capacity_16) |
1537 | return -EINVAL; | |
1538 | ||
1da177e4 | 1539 | do { |
0da205e0 MW |
1540 | memset(cmd, 0, 16); |
1541 | cmd[0] = SERVICE_ACTION_IN; | |
1542 | cmd[1] = SAI_READ_CAPACITY_16; | |
1543 | cmd[13] = RC16_LEN; | |
1544 | memset(buffer, 0, RC16_LEN); | |
1545 | ||
ea73a9f2 | 1546 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, |
0da205e0 MW |
1547 | buffer, RC16_LEN, &sshdr, |
1548 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
1da177e4 | 1549 | |
ea73a9f2 | 1550 | if (media_not_present(sdkp, &sshdr)) |
0da205e0 | 1551 | return -ENODEV; |
1da177e4 | 1552 | |
2b301307 | 1553 | if (the_result) { |
ea73a9f2 | 1554 | sense_valid = scsi_sense_valid(&sshdr); |
2b301307 MW |
1555 | if (sense_valid && |
1556 | sshdr.sense_key == ILLEGAL_REQUEST && | |
1557 | (sshdr.asc == 0x20 || sshdr.asc == 0x24) && | |
1558 | sshdr.ascq == 0x00) | |
1559 | /* Invalid Command Operation Code or | |
1560 | * Invalid Field in CDB, just retry | |
1561 | * silently with RC10 */ | |
1562 | return -EINVAL; | |
3233ac19 JB |
1563 | if (sense_valid && |
1564 | sshdr.sense_key == UNIT_ATTENTION && | |
1565 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) | |
1566 | /* Device reset might occur several times, | |
1567 | * give it one more chance */ | |
1568 | if (--reset_retries > 0) | |
1569 | continue; | |
2b301307 | 1570 | } |
1da177e4 LT |
1571 | retries--; |
1572 | ||
1573 | } while (the_result && retries); | |
1574 | ||
0da205e0 | 1575 | if (the_result) { |
e73aec82 | 1576 | sd_printk(KERN_NOTICE, sdkp, "READ CAPACITY(16) failed\n"); |
0da205e0 MW |
1577 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); |
1578 | return -EINVAL; | |
1579 | } | |
e73aec82 | 1580 | |
8f76d151 DH |
1581 | sector_size = get_unaligned_be32(&buffer[8]); |
1582 | lba = get_unaligned_be64(&buffer[0]); | |
0da205e0 MW |
1583 | |
1584 | sd_read_protection_type(sdkp, buffer); | |
1585 | ||
1586 | if ((sizeof(sdkp->capacity) == 4) && (lba >= 0xffffffffULL)) { | |
1587 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a " | |
1588 | "kernel compiled with support for large block " | |
1589 | "devices.\n"); | |
1590 | sdkp->capacity = 0; | |
1591 | return -EOVERFLOW; | |
1592 | } | |
1593 | ||
ea09bcc9 | 1594 | /* Logical blocks per physical block exponent */ |
526f7c79 | 1595 | sdkp->physical_block_size = (1 << (buffer[13] & 0xf)) * sector_size; |
ea09bcc9 MP |
1596 | |
1597 | /* Lowest aligned logical block */ | |
1598 | alignment = ((buffer[14] & 0x3f) << 8 | buffer[15]) * sector_size; | |
1599 | blk_queue_alignment_offset(sdp->request_queue, alignment); | |
1600 | if (alignment && sdkp->first_scan) | |
1601 | sd_printk(KERN_NOTICE, sdkp, | |
1602 | "physical block alignment offset: %u\n", alignment); | |
1603 | ||
e339c1a7 MP |
1604 | if (buffer[14] & 0x80) { /* TPE */ |
1605 | struct request_queue *q = sdp->request_queue; | |
1606 | ||
1607 | sdkp->thin_provisioning = 1; | |
526f7c79 | 1608 | q->limits.discard_granularity = sdkp->physical_block_size; |
e339c1a7 MP |
1609 | q->limits.max_discard_sectors = 0xffffffff; |
1610 | ||
1611 | if (buffer[14] & 0x40) /* TPRZ */ | |
1612 | q->limits.discard_zeroes_data = 1; | |
1613 | ||
1614 | queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, q); | |
1615 | } | |
1616 | ||
0da205e0 MW |
1617 | sdkp->capacity = lba + 1; |
1618 | return sector_size; | |
1619 | } | |
1620 | ||
1621 | static int read_capacity_10(struct scsi_disk *sdkp, struct scsi_device *sdp, | |
1622 | unsigned char *buffer) | |
1623 | { | |
1624 | unsigned char cmd[16]; | |
1625 | struct scsi_sense_hdr sshdr; | |
1626 | int sense_valid = 0; | |
1627 | int the_result; | |
3233ac19 | 1628 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
0da205e0 MW |
1629 | sector_t lba; |
1630 | unsigned sector_size; | |
1631 | ||
1632 | do { | |
1633 | cmd[0] = READ_CAPACITY; | |
1634 | memset(&cmd[1], 0, 9); | |
1635 | memset(buffer, 0, 8); | |
1636 | ||
1637 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, | |
1638 | buffer, 8, &sshdr, | |
1639 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
1640 | ||
1641 | if (media_not_present(sdkp, &sshdr)) | |
1642 | return -ENODEV; | |
1643 | ||
3233ac19 | 1644 | if (the_result) { |
0da205e0 | 1645 | sense_valid = scsi_sense_valid(&sshdr); |
3233ac19 JB |
1646 | if (sense_valid && |
1647 | sshdr.sense_key == UNIT_ATTENTION && | |
1648 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) | |
1649 | /* Device reset might occur several times, | |
1650 | * give it one more chance */ | |
1651 | if (--reset_retries > 0) | |
1652 | continue; | |
1653 | } | |
0da205e0 MW |
1654 | retries--; |
1655 | ||
1656 | } while (the_result && retries); | |
1657 | ||
1658 | if (the_result) { | |
1659 | sd_printk(KERN_NOTICE, sdkp, "READ CAPACITY failed\n"); | |
1660 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); | |
1661 | return -EINVAL; | |
1662 | } | |
1663 | ||
8f76d151 DH |
1664 | sector_size = get_unaligned_be32(&buffer[4]); |
1665 | lba = get_unaligned_be32(&buffer[0]); | |
0da205e0 | 1666 | |
5ce524bd HG |
1667 | if (sdp->no_read_capacity_16 && (lba == 0xffffffff)) { |
1668 | /* Some buggy (usb cardreader) devices return an lba of | |
1669 | 0xffffffff when the want to report a size of 0 (with | |
1670 | which they really mean no media is present) */ | |
1671 | sdkp->capacity = 0; | |
5cc10350 | 1672 | sdkp->physical_block_size = sector_size; |
5ce524bd HG |
1673 | return sector_size; |
1674 | } | |
1675 | ||
0da205e0 MW |
1676 | if ((sizeof(sdkp->capacity) == 4) && (lba == 0xffffffff)) { |
1677 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a " | |
1678 | "kernel compiled with support for large block " | |
1679 | "devices.\n"); | |
1680 | sdkp->capacity = 0; | |
1681 | return -EOVERFLOW; | |
1682 | } | |
1683 | ||
1684 | sdkp->capacity = lba + 1; | |
526f7c79 | 1685 | sdkp->physical_block_size = sector_size; |
0da205e0 MW |
1686 | return sector_size; |
1687 | } | |
1688 | ||
2b301307 MW |
1689 | static int sd_try_rc16_first(struct scsi_device *sdp) |
1690 | { | |
f87146bb HR |
1691 | if (sdp->host->max_cmd_len < 16) |
1692 | return 0; | |
2b301307 MW |
1693 | if (sdp->scsi_level > SCSI_SPC_2) |
1694 | return 1; | |
1695 | if (scsi_device_protection(sdp)) | |
1696 | return 1; | |
1697 | return 0; | |
1698 | } | |
1699 | ||
0da205e0 MW |
1700 | /* |
1701 | * read disk capacity | |
1702 | */ | |
1703 | static void | |
1704 | sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer) | |
1705 | { | |
1706 | int sector_size; | |
1707 | struct scsi_device *sdp = sdkp->device; | |
70a9b873 | 1708 | sector_t old_capacity = sdkp->capacity; |
0da205e0 | 1709 | |
2b301307 | 1710 | if (sd_try_rc16_first(sdp)) { |
0da205e0 MW |
1711 | sector_size = read_capacity_16(sdkp, sdp, buffer); |
1712 | if (sector_size == -EOVERFLOW) | |
1da177e4 | 1713 | goto got_data; |
2b301307 MW |
1714 | if (sector_size == -ENODEV) |
1715 | return; | |
1716 | if (sector_size < 0) | |
1717 | sector_size = read_capacity_10(sdkp, sdp, buffer); | |
0da205e0 MW |
1718 | if (sector_size < 0) |
1719 | return; | |
1da177e4 | 1720 | } else { |
0da205e0 MW |
1721 | sector_size = read_capacity_10(sdkp, sdp, buffer); |
1722 | if (sector_size == -EOVERFLOW) | |
1723 | goto got_data; | |
1724 | if (sector_size < 0) | |
1725 | return; | |
1726 | if ((sizeof(sdkp->capacity) > 4) && | |
1727 | (sdkp->capacity > 0xffffffffULL)) { | |
1728 | int old_sector_size = sector_size; | |
1729 | sd_printk(KERN_NOTICE, sdkp, "Very big device. " | |
1730 | "Trying to use READ CAPACITY(16).\n"); | |
1731 | sector_size = read_capacity_16(sdkp, sdp, buffer); | |
1732 | if (sector_size < 0) { | |
1733 | sd_printk(KERN_NOTICE, sdkp, | |
1734 | "Using 0xffffffff as device size\n"); | |
1735 | sdkp->capacity = 1 + (sector_t) 0xffffffff; | |
1736 | sector_size = old_sector_size; | |
1737 | goto got_data; | |
1738 | } | |
1739 | } | |
1740 | } | |
1da177e4 | 1741 | |
5c211caa AS |
1742 | /* Some devices are known to return the total number of blocks, |
1743 | * not the highest block number. Some devices have versions | |
1744 | * which do this and others which do not. Some devices we might | |
1745 | * suspect of doing this but we don't know for certain. | |
1746 | * | |
1747 | * If we know the reported capacity is wrong, decrement it. If | |
1748 | * we can only guess, then assume the number of blocks is even | |
1749 | * (usually true but not always) and err on the side of lowering | |
1750 | * the capacity. | |
1751 | */ | |
1752 | if (sdp->fix_capacity || | |
1753 | (sdp->guess_capacity && (sdkp->capacity & 0x01))) { | |
1754 | sd_printk(KERN_INFO, sdkp, "Adjusting the sector count " | |
1755 | "from its reported value: %llu\n", | |
1756 | (unsigned long long) sdkp->capacity); | |
1da177e4 | 1757 | --sdkp->capacity; |
61bf54b7 ON |
1758 | } |
1759 | ||
1da177e4 LT |
1760 | got_data: |
1761 | if (sector_size == 0) { | |
1762 | sector_size = 512; | |
e73aec82 MP |
1763 | sd_printk(KERN_NOTICE, sdkp, "Sector size 0 reported, " |
1764 | "assuming 512.\n"); | |
1da177e4 LT |
1765 | } |
1766 | ||
1767 | if (sector_size != 512 && | |
1768 | sector_size != 1024 && | |
1769 | sector_size != 2048 && | |
1770 | sector_size != 4096 && | |
1771 | sector_size != 256) { | |
e73aec82 MP |
1772 | sd_printk(KERN_NOTICE, sdkp, "Unsupported sector size %d.\n", |
1773 | sector_size); | |
1da177e4 LT |
1774 | /* |
1775 | * The user might want to re-format the drive with | |
1776 | * a supported sectorsize. Once this happens, it | |
1777 | * would be relatively trivial to set the thing up. | |
1778 | * For this reason, we leave the thing in the table. | |
1779 | */ | |
1780 | sdkp->capacity = 0; | |
1781 | /* | |
1782 | * set a bogus sector size so the normal read/write | |
1783 | * logic in the block layer will eventually refuse any | |
1784 | * request on this device without tripping over power | |
1785 | * of two sector size assumptions | |
1786 | */ | |
1787 | sector_size = 512; | |
1788 | } | |
e1defc4f | 1789 | blk_queue_logical_block_size(sdp->request_queue, sector_size); |
7404ad3b | 1790 | |
1da177e4 | 1791 | { |
7404ad3b | 1792 | char cap_str_2[10], cap_str_10[10]; |
520a2c27 | 1793 | u64 sz = (u64)sdkp->capacity << ilog2(sector_size); |
1da177e4 | 1794 | |
7404ad3b JB |
1795 | string_get_size(sz, STRING_UNITS_2, cap_str_2, |
1796 | sizeof(cap_str_2)); | |
1797 | string_get_size(sz, STRING_UNITS_10, cap_str_10, | |
1798 | sizeof(cap_str_10)); | |
1da177e4 | 1799 | |
ea09bcc9 | 1800 | if (sdkp->first_scan || old_capacity != sdkp->capacity) { |
70a9b873 | 1801 | sd_printk(KERN_NOTICE, sdkp, |
ea09bcc9 | 1802 | "%llu %d-byte logical blocks: (%s/%s)\n", |
70a9b873 MP |
1803 | (unsigned long long)sdkp->capacity, |
1804 | sector_size, cap_str_10, cap_str_2); | |
ea09bcc9 | 1805 | |
526f7c79 | 1806 | if (sdkp->physical_block_size != sector_size) |
ea09bcc9 MP |
1807 | sd_printk(KERN_NOTICE, sdkp, |
1808 | "%u-byte physical blocks\n", | |
526f7c79 | 1809 | sdkp->physical_block_size); |
ea09bcc9 | 1810 | } |
1da177e4 LT |
1811 | } |
1812 | ||
1813 | /* Rescale capacity to 512-byte units */ | |
1814 | if (sector_size == 4096) | |
1815 | sdkp->capacity <<= 3; | |
1816 | else if (sector_size == 2048) | |
1817 | sdkp->capacity <<= 2; | |
1818 | else if (sector_size == 1024) | |
1819 | sdkp->capacity <<= 1; | |
1820 | else if (sector_size == 256) | |
1821 | sdkp->capacity >>= 1; | |
1822 | ||
526f7c79 MP |
1823 | blk_queue_physical_block_size(sdp->request_queue, |
1824 | sdkp->physical_block_size); | |
1da177e4 LT |
1825 | sdkp->device->sector_size = sector_size; |
1826 | } | |
1827 | ||
1828 | /* called with buffer of length 512 */ | |
1829 | static inline int | |
ea73a9f2 JB |
1830 | sd_do_mode_sense(struct scsi_device *sdp, int dbd, int modepage, |
1831 | unsigned char *buffer, int len, struct scsi_mode_data *data, | |
1832 | struct scsi_sense_hdr *sshdr) | |
1da177e4 | 1833 | { |
ea73a9f2 | 1834 | return scsi_mode_sense(sdp, dbd, modepage, buffer, len, |
1cf72699 | 1835 | SD_TIMEOUT, SD_MAX_RETRIES, data, |
ea73a9f2 | 1836 | sshdr); |
1da177e4 LT |
1837 | } |
1838 | ||
1839 | /* | |
1840 | * read write protect setting, if possible - called only in sd_revalidate_disk() | |
48970800 | 1841 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
1842 | */ |
1843 | static void | |
e73aec82 | 1844 | sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer) |
ea73a9f2 | 1845 | { |
1da177e4 | 1846 | int res; |
ea73a9f2 | 1847 | struct scsi_device *sdp = sdkp->device; |
1da177e4 | 1848 | struct scsi_mode_data data; |
70a9b873 | 1849 | int old_wp = sdkp->write_prot; |
1da177e4 LT |
1850 | |
1851 | set_disk_ro(sdkp->disk, 0); | |
ea73a9f2 | 1852 | if (sdp->skip_ms_page_3f) { |
e73aec82 | 1853 | sd_printk(KERN_NOTICE, sdkp, "Assuming Write Enabled\n"); |
1da177e4 LT |
1854 | return; |
1855 | } | |
1856 | ||
ea73a9f2 JB |
1857 | if (sdp->use_192_bytes_for_3f) { |
1858 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 192, &data, NULL); | |
1da177e4 LT |
1859 | } else { |
1860 | /* | |
1861 | * First attempt: ask for all pages (0x3F), but only 4 bytes. | |
1862 | * We have to start carefully: some devices hang if we ask | |
1863 | * for more than is available. | |
1864 | */ | |
ea73a9f2 | 1865 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 4, &data, NULL); |
1da177e4 LT |
1866 | |
1867 | /* | |
1868 | * Second attempt: ask for page 0 When only page 0 is | |
1869 | * implemented, a request for page 3F may return Sense Key | |
1870 | * 5: Illegal Request, Sense Code 24: Invalid field in | |
1871 | * CDB. | |
1872 | */ | |
1873 | if (!scsi_status_is_good(res)) | |
ea73a9f2 | 1874 | res = sd_do_mode_sense(sdp, 0, 0, buffer, 4, &data, NULL); |
1da177e4 LT |
1875 | |
1876 | /* | |
1877 | * Third attempt: ask 255 bytes, as we did earlier. | |
1878 | */ | |
1879 | if (!scsi_status_is_good(res)) | |
ea73a9f2 JB |
1880 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 255, |
1881 | &data, NULL); | |
1da177e4 LT |
1882 | } |
1883 | ||
1884 | if (!scsi_status_is_good(res)) { | |
e73aec82 MP |
1885 | sd_printk(KERN_WARNING, sdkp, |
1886 | "Test WP failed, assume Write Enabled\n"); | |
1da177e4 LT |
1887 | } else { |
1888 | sdkp->write_prot = ((data.device_specific & 0x80) != 0); | |
1889 | set_disk_ro(sdkp->disk, sdkp->write_prot); | |
70a9b873 MP |
1890 | if (sdkp->first_scan || old_wp != sdkp->write_prot) { |
1891 | sd_printk(KERN_NOTICE, sdkp, "Write Protect is %s\n", | |
1892 | sdkp->write_prot ? "on" : "off"); | |
1893 | sd_printk(KERN_DEBUG, sdkp, | |
1894 | "Mode Sense: %02x %02x %02x %02x\n", | |
1895 | buffer[0], buffer[1], buffer[2], buffer[3]); | |
1896 | } | |
1da177e4 LT |
1897 | } |
1898 | } | |
1899 | ||
1900 | /* | |
1901 | * sd_read_cache_type - called only from sd_revalidate_disk() | |
48970800 | 1902 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
1903 | */ |
1904 | static void | |
e73aec82 | 1905 | sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer) |
631e8a13 | 1906 | { |
1da177e4 | 1907 | int len = 0, res; |
ea73a9f2 | 1908 | struct scsi_device *sdp = sdkp->device; |
1da177e4 | 1909 | |
631e8a13 AV |
1910 | int dbd; |
1911 | int modepage; | |
1da177e4 LT |
1912 | struct scsi_mode_data data; |
1913 | struct scsi_sense_hdr sshdr; | |
70a9b873 MP |
1914 | int old_wce = sdkp->WCE; |
1915 | int old_rcd = sdkp->RCD; | |
1916 | int old_dpofua = sdkp->DPOFUA; | |
1da177e4 | 1917 | |
24d720b7 LT |
1918 | if (sdp->skip_ms_page_8) { |
1919 | if (sdp->type == TYPE_RBC) | |
1920 | goto defaults; | |
1921 | else { | |
1922 | modepage = 0x3F; | |
1923 | dbd = 0; | |
1924 | } | |
1925 | } else if (sdp->type == TYPE_RBC) { | |
631e8a13 AV |
1926 | modepage = 6; |
1927 | dbd = 8; | |
1928 | } else { | |
1929 | modepage = 8; | |
1930 | dbd = 0; | |
1931 | } | |
1932 | ||
1da177e4 | 1933 | /* cautiously ask */ |
ea73a9f2 | 1934 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, 4, &data, &sshdr); |
1da177e4 LT |
1935 | |
1936 | if (!scsi_status_is_good(res)) | |
1937 | goto bad_sense; | |
1938 | ||
6d73c851 AV |
1939 | if (!data.header_length) { |
1940 | modepage = 6; | |
e73aec82 | 1941 | sd_printk(KERN_ERR, sdkp, "Missing header in MODE_SENSE response\n"); |
6d73c851 AV |
1942 | } |
1943 | ||
1da177e4 LT |
1944 | /* that went OK, now ask for the proper length */ |
1945 | len = data.length; | |
1946 | ||
1947 | /* | |
1948 | * We're only interested in the first three bytes, actually. | |
1949 | * But the data cache page is defined for the first 20. | |
1950 | */ | |
1951 | if (len < 3) | |
1952 | goto bad_sense; | |
24d720b7 LT |
1953 | else if (len > SD_BUF_SIZE) { |
1954 | sd_printk(KERN_NOTICE, sdkp, "Truncating mode parameter " | |
1955 | "data from %d to %d bytes\n", len, SD_BUF_SIZE); | |
1956 | len = SD_BUF_SIZE; | |
1957 | } | |
1da177e4 LT |
1958 | |
1959 | /* Get the data */ | |
ea73a9f2 | 1960 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, len, &data, &sshdr); |
1da177e4 LT |
1961 | |
1962 | if (scsi_status_is_good(res)) { | |
631e8a13 | 1963 | int offset = data.header_length + data.block_descriptor_length; |
1da177e4 | 1964 | |
24d720b7 LT |
1965 | while (offset < len) { |
1966 | u8 page_code = buffer[offset] & 0x3F; | |
1967 | u8 spf = buffer[offset] & 0x40; | |
1968 | ||
1969 | if (page_code == 8 || page_code == 6) { | |
1970 | /* We're interested only in the first 3 bytes. | |
1971 | */ | |
1972 | if (len - offset <= 2) { | |
1973 | sd_printk(KERN_ERR, sdkp, "Incomplete " | |
1974 | "mode parameter data\n"); | |
1975 | goto defaults; | |
1976 | } else { | |
1977 | modepage = page_code; | |
1978 | goto Page_found; | |
1979 | } | |
1980 | } else { | |
1981 | /* Go to the next page */ | |
1982 | if (spf && len - offset > 3) | |
1983 | offset += 4 + (buffer[offset+2] << 8) + | |
1984 | buffer[offset+3]; | |
1985 | else if (!spf && len - offset > 1) | |
1986 | offset += 2 + buffer[offset+1]; | |
1987 | else { | |
1988 | sd_printk(KERN_ERR, sdkp, "Incomplete " | |
1989 | "mode parameter data\n"); | |
1990 | goto defaults; | |
1991 | } | |
1992 | } | |
48970800 AV |
1993 | } |
1994 | ||
24d720b7 LT |
1995 | if (modepage == 0x3F) { |
1996 | sd_printk(KERN_ERR, sdkp, "No Caching mode page " | |
1997 | "present\n"); | |
1998 | goto defaults; | |
1999 | } else if ((buffer[offset] & 0x3f) != modepage) { | |
e73aec82 | 2000 | sd_printk(KERN_ERR, sdkp, "Got wrong page\n"); |
631e8a13 AV |
2001 | goto defaults; |
2002 | } | |
24d720b7 | 2003 | Page_found: |
631e8a13 AV |
2004 | if (modepage == 8) { |
2005 | sdkp->WCE = ((buffer[offset + 2] & 0x04) != 0); | |
2006 | sdkp->RCD = ((buffer[offset + 2] & 0x01) != 0); | |
2007 | } else { | |
2008 | sdkp->WCE = ((buffer[offset + 2] & 0x01) == 0); | |
2009 | sdkp->RCD = 0; | |
2010 | } | |
1da177e4 | 2011 | |
007365ad TH |
2012 | sdkp->DPOFUA = (data.device_specific & 0x10) != 0; |
2013 | if (sdkp->DPOFUA && !sdkp->device->use_10_for_rw) { | |
e73aec82 MP |
2014 | sd_printk(KERN_NOTICE, sdkp, |
2015 | "Uses READ/WRITE(6), disabling FUA\n"); | |
007365ad TH |
2016 | sdkp->DPOFUA = 0; |
2017 | } | |
2018 | ||
70a9b873 MP |
2019 | if (sdkp->first_scan || old_wce != sdkp->WCE || |
2020 | old_rcd != sdkp->RCD || old_dpofua != sdkp->DPOFUA) | |
2021 | sd_printk(KERN_NOTICE, sdkp, | |
2022 | "Write cache: %s, read cache: %s, %s\n", | |
2023 | sdkp->WCE ? "enabled" : "disabled", | |
2024 | sdkp->RCD ? "disabled" : "enabled", | |
2025 | sdkp->DPOFUA ? "supports DPO and FUA" | |
2026 | : "doesn't support DPO or FUA"); | |
1da177e4 LT |
2027 | |
2028 | return; | |
2029 | } | |
2030 | ||
2031 | bad_sense: | |
ea73a9f2 | 2032 | if (scsi_sense_valid(&sshdr) && |
1da177e4 LT |
2033 | sshdr.sense_key == ILLEGAL_REQUEST && |
2034 | sshdr.asc == 0x24 && sshdr.ascq == 0x0) | |
e73aec82 MP |
2035 | /* Invalid field in CDB */ |
2036 | sd_printk(KERN_NOTICE, sdkp, "Cache data unavailable\n"); | |
1da177e4 | 2037 | else |
e73aec82 | 2038 | sd_printk(KERN_ERR, sdkp, "Asking for cache data failed\n"); |
1da177e4 LT |
2039 | |
2040 | defaults: | |
e73aec82 | 2041 | sd_printk(KERN_ERR, sdkp, "Assuming drive cache: write through\n"); |
1da177e4 LT |
2042 | sdkp->WCE = 0; |
2043 | sdkp->RCD = 0; | |
48970800 | 2044 | sdkp->DPOFUA = 0; |
1da177e4 LT |
2045 | } |
2046 | ||
e0597d70 MP |
2047 | /* |
2048 | * The ATO bit indicates whether the DIF application tag is available | |
2049 | * for use by the operating system. | |
2050 | */ | |
439d77f7 | 2051 | static void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer) |
e0597d70 MP |
2052 | { |
2053 | int res, offset; | |
2054 | struct scsi_device *sdp = sdkp->device; | |
2055 | struct scsi_mode_data data; | |
2056 | struct scsi_sense_hdr sshdr; | |
2057 | ||
2058 | if (sdp->type != TYPE_DISK) | |
2059 | return; | |
2060 | ||
2061 | if (sdkp->protection_type == 0) | |
2062 | return; | |
2063 | ||
2064 | res = scsi_mode_sense(sdp, 1, 0x0a, buffer, 36, SD_TIMEOUT, | |
2065 | SD_MAX_RETRIES, &data, &sshdr); | |
2066 | ||
2067 | if (!scsi_status_is_good(res) || !data.header_length || | |
2068 | data.length < 6) { | |
2069 | sd_printk(KERN_WARNING, sdkp, | |
2070 | "getting Control mode page failed, assume no ATO\n"); | |
2071 | ||
2072 | if (scsi_sense_valid(&sshdr)) | |
2073 | sd_print_sense_hdr(sdkp, &sshdr); | |
2074 | ||
2075 | return; | |
2076 | } | |
2077 | ||
2078 | offset = data.header_length + data.block_descriptor_length; | |
2079 | ||
2080 | if ((buffer[offset] & 0x3f) != 0x0a) { | |
2081 | sd_printk(KERN_ERR, sdkp, "ATO Got wrong page\n"); | |
2082 | return; | |
2083 | } | |
2084 | ||
2085 | if ((buffer[offset + 5] & 0x80) == 0) | |
2086 | return; | |
2087 | ||
2088 | sdkp->ATO = 1; | |
2089 | ||
2090 | return; | |
2091 | } | |
2092 | ||
d11b6916 MP |
2093 | /** |
2094 | * sd_read_block_limits - Query disk device for preferred I/O sizes. | |
2095 | * @disk: disk to query | |
2096 | */ | |
2097 | static void sd_read_block_limits(struct scsi_disk *sdkp) | |
2098 | { | |
e339c1a7 | 2099 | struct request_queue *q = sdkp->disk->queue; |
d11b6916 | 2100 | unsigned int sector_sz = sdkp->device->sector_size; |
bb2d3de1 | 2101 | const int vpd_len = 64; |
e3deec09 | 2102 | unsigned char *buffer = kmalloc(vpd_len, GFP_KERNEL); |
d11b6916 | 2103 | |
e3deec09 JB |
2104 | if (!buffer || |
2105 | /* Block Limits VPD */ | |
2106 | scsi_get_vpd_page(sdkp->device, 0xb0, buffer, vpd_len)) | |
2107 | goto out; | |
d11b6916 MP |
2108 | |
2109 | blk_queue_io_min(sdkp->disk->queue, | |
2110 | get_unaligned_be16(&buffer[6]) * sector_sz); | |
2111 | blk_queue_io_opt(sdkp->disk->queue, | |
2112 | get_unaligned_be32(&buffer[12]) * sector_sz); | |
2113 | ||
e339c1a7 MP |
2114 | /* Thin provisioning enabled and page length indicates TP support */ |
2115 | if (sdkp->thin_provisioning && buffer[3] == 0x3c) { | |
2116 | unsigned int lba_count, desc_count, granularity; | |
2117 | ||
2118 | lba_count = get_unaligned_be32(&buffer[20]); | |
2119 | desc_count = get_unaligned_be32(&buffer[24]); | |
2120 | ||
045d3fe7 MP |
2121 | if (lba_count && desc_count) { |
2122 | if (sdkp->tpvpd && !sdkp->tpu) | |
2123 | sdkp->unmap = 0; | |
2124 | else | |
e339c1a7 MP |
2125 | sdkp->unmap = 1; |
2126 | } | |
2127 | ||
045d3fe7 MP |
2128 | if (sdkp->tpvpd && !sdkp->tpu && !sdkp->tpws) { |
2129 | sd_printk(KERN_ERR, sdkp, "Thin provisioning is " \ | |
2130 | "enabled but neither TPU, nor TPWS are " \ | |
2131 | "set. Disabling discard!\n"); | |
2132 | goto out; | |
2133 | } | |
2134 | ||
2135 | if (lba_count) | |
2136 | q->limits.max_discard_sectors = | |
2137 | lba_count * sector_sz >> 9; | |
2138 | ||
e339c1a7 MP |
2139 | granularity = get_unaligned_be32(&buffer[28]); |
2140 | ||
2141 | if (granularity) | |
2142 | q->limits.discard_granularity = granularity * sector_sz; | |
2143 | ||
2144 | if (buffer[32] & 0x80) | |
2145 | q->limits.discard_alignment = | |
2146 | get_unaligned_be32(&buffer[32]) & ~(1 << 31); | |
2147 | } | |
2148 | ||
e3deec09 | 2149 | out: |
d11b6916 MP |
2150 | kfree(buffer); |
2151 | } | |
2152 | ||
3821d768 MP |
2153 | /** |
2154 | * sd_read_block_characteristics - Query block dev. characteristics | |
2155 | * @disk: disk to query | |
2156 | */ | |
2157 | static void sd_read_block_characteristics(struct scsi_disk *sdkp) | |
2158 | { | |
e3deec09 | 2159 | unsigned char *buffer; |
3821d768 | 2160 | u16 rot; |
bb2d3de1 | 2161 | const int vpd_len = 64; |
3821d768 | 2162 | |
e3deec09 | 2163 | buffer = kmalloc(vpd_len, GFP_KERNEL); |
3821d768 | 2164 | |
e3deec09 JB |
2165 | if (!buffer || |
2166 | /* Block Device Characteristics VPD */ | |
2167 | scsi_get_vpd_page(sdkp->device, 0xb1, buffer, vpd_len)) | |
2168 | goto out; | |
3821d768 MP |
2169 | |
2170 | rot = get_unaligned_be16(&buffer[4]); | |
2171 | ||
2172 | if (rot == 1) | |
2173 | queue_flag_set_unlocked(QUEUE_FLAG_NONROT, sdkp->disk->queue); | |
2174 | ||
e3deec09 | 2175 | out: |
3821d768 MP |
2176 | kfree(buffer); |
2177 | } | |
2178 | ||
045d3fe7 MP |
2179 | /** |
2180 | * sd_read_thin_provisioning - Query thin provisioning VPD page | |
2181 | * @disk: disk to query | |
2182 | */ | |
2183 | static void sd_read_thin_provisioning(struct scsi_disk *sdkp) | |
2184 | { | |
2185 | unsigned char *buffer; | |
2186 | const int vpd_len = 8; | |
2187 | ||
2188 | if (sdkp->thin_provisioning == 0) | |
2189 | return; | |
2190 | ||
2191 | buffer = kmalloc(vpd_len, GFP_KERNEL); | |
2192 | ||
2193 | if (!buffer || scsi_get_vpd_page(sdkp->device, 0xb2, buffer, vpd_len)) | |
2194 | goto out; | |
2195 | ||
2196 | sdkp->tpvpd = 1; | |
2197 | sdkp->tpu = (buffer[5] >> 7) & 1; /* UNMAP */ | |
2198 | sdkp->tpws = (buffer[5] >> 6) & 1; /* WRITE SAME(16) with UNMAP */ | |
2199 | ||
2200 | out: | |
2201 | kfree(buffer); | |
2202 | } | |
2203 | ||
ffd4bc2a MP |
2204 | static int sd_try_extended_inquiry(struct scsi_device *sdp) |
2205 | { | |
2206 | /* | |
2207 | * Although VPD inquiries can go to SCSI-2 type devices, | |
2208 | * some USB ones crash on receiving them, and the pages | |
2209 | * we currently ask for are for SPC-3 and beyond | |
2210 | */ | |
2211 | if (sdp->scsi_level > SCSI_SPC_2) | |
2212 | return 1; | |
2213 | return 0; | |
2214 | } | |
2215 | ||
1da177e4 LT |
2216 | /** |
2217 | * sd_revalidate_disk - called the first time a new disk is seen, | |
2218 | * performs disk spin up, read_capacity, etc. | |
2219 | * @disk: struct gendisk we care about | |
2220 | **/ | |
2221 | static int sd_revalidate_disk(struct gendisk *disk) | |
2222 | { | |
2223 | struct scsi_disk *sdkp = scsi_disk(disk); | |
2224 | struct scsi_device *sdp = sdkp->device; | |
1da177e4 | 2225 | unsigned char *buffer; |
4913efe4 | 2226 | unsigned flush = 0; |
1da177e4 | 2227 | |
fa0d34be MP |
2228 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, |
2229 | "sd_revalidate_disk\n")); | |
1da177e4 LT |
2230 | |
2231 | /* | |
2232 | * If the device is offline, don't try and read capacity or any | |
2233 | * of the other niceties. | |
2234 | */ | |
2235 | if (!scsi_device_online(sdp)) | |
2236 | goto out; | |
2237 | ||
a6123f14 | 2238 | buffer = kmalloc(SD_BUF_SIZE, GFP_KERNEL); |
1da177e4 | 2239 | if (!buffer) { |
e73aec82 MP |
2240 | sd_printk(KERN_WARNING, sdkp, "sd_revalidate_disk: Memory " |
2241 | "allocation failure.\n"); | |
ea73a9f2 | 2242 | goto out; |
1da177e4 LT |
2243 | } |
2244 | ||
e73aec82 | 2245 | sd_spinup_disk(sdkp); |
1da177e4 LT |
2246 | |
2247 | /* | |
2248 | * Without media there is no reason to ask; moreover, some devices | |
2249 | * react badly if we do. | |
2250 | */ | |
2251 | if (sdkp->media_present) { | |
e73aec82 | 2252 | sd_read_capacity(sdkp, buffer); |
ffd4bc2a MP |
2253 | |
2254 | if (sd_try_extended_inquiry(sdp)) { | |
045d3fe7 | 2255 | sd_read_thin_provisioning(sdkp); |
ffd4bc2a MP |
2256 | sd_read_block_limits(sdkp); |
2257 | sd_read_block_characteristics(sdkp); | |
2258 | } | |
2259 | ||
e73aec82 MP |
2260 | sd_read_write_protect_flag(sdkp, buffer); |
2261 | sd_read_cache_type(sdkp, buffer); | |
e0597d70 | 2262 | sd_read_app_tag_own(sdkp, buffer); |
1da177e4 | 2263 | } |
461d4e90 | 2264 | |
70a9b873 MP |
2265 | sdkp->first_scan = 0; |
2266 | ||
461d4e90 TH |
2267 | /* |
2268 | * We now have all cache related info, determine how we deal | |
4913efe4 | 2269 | * with flush requests. |
461d4e90 | 2270 | */ |
4913efe4 TH |
2271 | if (sdkp->WCE) { |
2272 | flush |= REQ_FLUSH; | |
2273 | if (sdkp->DPOFUA) | |
2274 | flush |= REQ_FUA; | |
2275 | } | |
461d4e90 | 2276 | |
4913efe4 | 2277 | blk_queue_flush(sdkp->disk->queue, flush); |
461d4e90 | 2278 | |
1da177e4 LT |
2279 | set_capacity(disk, sdkp->capacity); |
2280 | kfree(buffer); | |
2281 | ||
1da177e4 LT |
2282 | out: |
2283 | return 0; | |
2284 | } | |
2285 | ||
72ec24bd TH |
2286 | /** |
2287 | * sd_unlock_native_capacity - unlock native capacity | |
2288 | * @disk: struct gendisk to set capacity for | |
2289 | * | |
2290 | * Block layer calls this function if it detects that partitions | |
2291 | * on @disk reach beyond the end of the device. If the SCSI host | |
2292 | * implements ->unlock_native_capacity() method, it's invoked to | |
2293 | * give it a chance to adjust the device capacity. | |
2294 | * | |
2295 | * CONTEXT: | |
2296 | * Defined by block layer. Might sleep. | |
2297 | */ | |
2298 | static void sd_unlock_native_capacity(struct gendisk *disk) | |
2299 | { | |
2300 | struct scsi_device *sdev = scsi_disk(disk)->device; | |
2301 | ||
2302 | if (sdev->host->hostt->unlock_native_capacity) | |
2303 | sdev->host->hostt->unlock_native_capacity(sdev); | |
2304 | } | |
2305 | ||
3e1a7ff8 TH |
2306 | /** |
2307 | * sd_format_disk_name - format disk name | |
2308 | * @prefix: name prefix - ie. "sd" for SCSI disks | |
2309 | * @index: index of the disk to format name for | |
2310 | * @buf: output buffer | |
2311 | * @buflen: length of the output buffer | |
2312 | * | |
2313 | * SCSI disk names starts at sda. The 26th device is sdz and the | |
2314 | * 27th is sdaa. The last one for two lettered suffix is sdzz | |
2315 | * which is followed by sdaaa. | |
2316 | * | |
2317 | * This is basically 26 base counting with one extra 'nil' entry | |
3ad2f3fb | 2318 | * at the beginning from the second digit on and can be |
3e1a7ff8 TH |
2319 | * determined using similar method as 26 base conversion with the |
2320 | * index shifted -1 after each digit is computed. | |
2321 | * | |
2322 | * CONTEXT: | |
2323 | * Don't care. | |
2324 | * | |
2325 | * RETURNS: | |
2326 | * 0 on success, -errno on failure. | |
2327 | */ | |
2328 | static int sd_format_disk_name(char *prefix, int index, char *buf, int buflen) | |
2329 | { | |
2330 | const int base = 'z' - 'a' + 1; | |
2331 | char *begin = buf + strlen(prefix); | |
2332 | char *end = buf + buflen; | |
2333 | char *p; | |
2334 | int unit; | |
2335 | ||
2336 | p = end - 1; | |
2337 | *p = '\0'; | |
2338 | unit = base; | |
2339 | do { | |
2340 | if (p == begin) | |
2341 | return -EINVAL; | |
2342 | *--p = 'a' + (index % unit); | |
2343 | index = (index / unit) - 1; | |
2344 | } while (index >= 0); | |
2345 | ||
2346 | memmove(begin, p, end - p); | |
2347 | memcpy(buf, prefix, strlen(prefix)); | |
2348 | ||
2349 | return 0; | |
2350 | } | |
2351 | ||
4ace92fc AV |
2352 | /* |
2353 | * The asynchronous part of sd_probe | |
2354 | */ | |
2355 | static void sd_probe_async(void *data, async_cookie_t cookie) | |
2356 | { | |
2357 | struct scsi_disk *sdkp = data; | |
2358 | struct scsi_device *sdp; | |
2359 | struct gendisk *gd; | |
2360 | u32 index; | |
2361 | struct device *dev; | |
2362 | ||
2363 | sdp = sdkp->device; | |
2364 | gd = sdkp->disk; | |
2365 | index = sdkp->index; | |
2366 | dev = &sdp->sdev_gendev; | |
2367 | ||
1a03ae0f MR |
2368 | gd->major = sd_major((index & 0xf0) >> 4); |
2369 | gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00); | |
2370 | gd->minors = SD_MINORS; | |
2371 | ||
4ace92fc AV |
2372 | gd->fops = &sd_fops; |
2373 | gd->private_data = &sdkp->driver; | |
2374 | gd->queue = sdkp->device->request_queue; | |
2375 | ||
70a9b873 MP |
2376 | /* defaults, until the device tells us otherwise */ |
2377 | sdp->sector_size = 512; | |
2378 | sdkp->capacity = 0; | |
2379 | sdkp->media_present = 1; | |
2380 | sdkp->write_prot = 0; | |
2381 | sdkp->WCE = 0; | |
2382 | sdkp->RCD = 0; | |
2383 | sdkp->ATO = 0; | |
2384 | sdkp->first_scan = 1; | |
2385 | ||
4ace92fc AV |
2386 | sd_revalidate_disk(gd); |
2387 | ||
2388 | blk_queue_prep_rq(sdp->request_queue, sd_prep_fn); | |
f1126e95 | 2389 | blk_queue_unprep_rq(sdp->request_queue, sd_unprep_fn); |
4ace92fc AV |
2390 | |
2391 | gd->driverfs_dev = &sdp->sdev_gendev; | |
97fedbbe | 2392 | gd->flags = GENHD_FL_EXT_DEVT; |
4ace92fc AV |
2393 | if (sdp->removable) |
2394 | gd->flags |= GENHD_FL_REMOVABLE; | |
2395 | ||
4ace92fc AV |
2396 | add_disk(gd); |
2397 | sd_dif_config_host(sdkp); | |
2398 | ||
3821d768 MP |
2399 | sd_revalidate_disk(gd); |
2400 | ||
4ace92fc AV |
2401 | sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n", |
2402 | sdp->removable ? "removable " : ""); | |
478a8a05 | 2403 | scsi_autopm_put_device(sdp); |
ea038f63 | 2404 | put_device(&sdkp->dev); |
4ace92fc AV |
2405 | } |
2406 | ||
1da177e4 LT |
2407 | /** |
2408 | * sd_probe - called during driver initialization and whenever a | |
2409 | * new scsi device is attached to the system. It is called once | |
2410 | * for each scsi device (not just disks) present. | |
2411 | * @dev: pointer to device object | |
2412 | * | |
2413 | * Returns 0 if successful (or not interested in this scsi device | |
2414 | * (e.g. scanner)); 1 when there is an error. | |
2415 | * | |
2416 | * Note: this function is invoked from the scsi mid-level. | |
2417 | * This function sets up the mapping between a given | |
2418 | * <host,channel,id,lun> (found in sdp) and new device name | |
2419 | * (e.g. /dev/sda). More precisely it is the block device major | |
2420 | * and minor number that is chosen here. | |
2421 | * | |
2422 | * Assume sd_attach is not re-entrant (for time being) | |
2423 | * Also think about sd_attach() and sd_remove() running coincidentally. | |
2424 | **/ | |
2425 | static int sd_probe(struct device *dev) | |
2426 | { | |
2427 | struct scsi_device *sdp = to_scsi_device(dev); | |
2428 | struct scsi_disk *sdkp; | |
2429 | struct gendisk *gd; | |
439d77f7 | 2430 | int index; |
1da177e4 LT |
2431 | int error; |
2432 | ||
2433 | error = -ENODEV; | |
631e8a13 | 2434 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_MOD && sdp->type != TYPE_RBC) |
1da177e4 LT |
2435 | goto out; |
2436 | ||
9ccfc756 JB |
2437 | SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO, sdp, |
2438 | "sd_attach\n")); | |
1da177e4 LT |
2439 | |
2440 | error = -ENOMEM; | |
24669f75 | 2441 | sdkp = kzalloc(sizeof(*sdkp), GFP_KERNEL); |
1da177e4 LT |
2442 | if (!sdkp) |
2443 | goto out; | |
2444 | ||
689d6fac | 2445 | gd = alloc_disk(SD_MINORS); |
1da177e4 LT |
2446 | if (!gd) |
2447 | goto out_free; | |
2448 | ||
f27bac27 TH |
2449 | do { |
2450 | if (!ida_pre_get(&sd_index_ida, GFP_KERNEL)) | |
2451 | goto out_put; | |
1da177e4 | 2452 | |
4034cc68 | 2453 | spin_lock(&sd_index_lock); |
f27bac27 | 2454 | error = ida_get_new(&sd_index_ida, &index); |
4034cc68 | 2455 | spin_unlock(&sd_index_lock); |
f27bac27 | 2456 | } while (error == -EAGAIN); |
1da177e4 | 2457 | |
1da177e4 LT |
2458 | if (error) |
2459 | goto out_put; | |
2460 | ||
1a03ae0f MR |
2461 | if (index >= SD_MAX_DISKS) { |
2462 | error = -ENODEV; | |
2463 | sdev_printk(KERN_WARNING, sdp, "SCSI disk (sd) name space exhausted.\n"); | |
2464 | goto out_free_index; | |
2465 | } | |
2466 | ||
3e1a7ff8 TH |
2467 | error = sd_format_disk_name("sd", index, gd->disk_name, DISK_NAME_LEN); |
2468 | if (error) | |
f27bac27 TH |
2469 | goto out_free_index; |
2470 | ||
1da177e4 LT |
2471 | sdkp->device = sdp; |
2472 | sdkp->driver = &sd_template; | |
2473 | sdkp->disk = gd; | |
2474 | sdkp->index = index; | |
409f3499 | 2475 | atomic_set(&sdkp->openers, 0); |
c02e6002 | 2476 | sdkp->previous_state = 1; |
1da177e4 | 2477 | |
601e7638 JB |
2478 | if (!sdp->request_queue->rq_timeout) { |
2479 | if (sdp->type != TYPE_MOD) | |
2480 | blk_queue_rq_timeout(sdp->request_queue, SD_TIMEOUT); | |
2481 | else | |
2482 | blk_queue_rq_timeout(sdp->request_queue, | |
2483 | SD_MOD_TIMEOUT); | |
2484 | } | |
2485 | ||
2486 | device_initialize(&sdkp->dev); | |
478a8a05 | 2487 | sdkp->dev.parent = dev; |
601e7638 | 2488 | sdkp->dev.class = &sd_disk_class; |
478a8a05 | 2489 | dev_set_name(&sdkp->dev, dev_name(dev)); |
601e7638 JB |
2490 | |
2491 | if (device_add(&sdkp->dev)) | |
2492 | goto out_free_index; | |
2493 | ||
478a8a05 AS |
2494 | get_device(dev); |
2495 | dev_set_drvdata(dev, sdkp); | |
601e7638 | 2496 | |
ea038f63 | 2497 | get_device(&sdkp->dev); /* prevent release before async_schedule */ |
4ace92fc | 2498 | async_schedule(sd_probe_async, sdkp); |
1da177e4 LT |
2499 | |
2500 | return 0; | |
2501 | ||
f27bac27 | 2502 | out_free_index: |
4034cc68 | 2503 | spin_lock(&sd_index_lock); |
f27bac27 | 2504 | ida_remove(&sd_index_ida, index); |
4034cc68 | 2505 | spin_unlock(&sd_index_lock); |
6bdaa1f1 | 2506 | out_put: |
1da177e4 | 2507 | put_disk(gd); |
6bdaa1f1 | 2508 | out_free: |
1da177e4 | 2509 | kfree(sdkp); |
6bdaa1f1 | 2510 | out: |
1da177e4 LT |
2511 | return error; |
2512 | } | |
2513 | ||
2514 | /** | |
2515 | * sd_remove - called whenever a scsi disk (previously recognized by | |
2516 | * sd_probe) is detached from the system. It is called (potentially | |
2517 | * multiple times) during sd module unload. | |
2518 | * @sdp: pointer to mid level scsi device object | |
2519 | * | |
2520 | * Note: this function is invoked from the scsi mid-level. | |
2521 | * This function potentially frees up a device name (e.g. /dev/sdc) | |
2522 | * that could be re-used by a subsequent sd_probe(). | |
2523 | * This function is not called when the built-in sd driver is "exit-ed". | |
2524 | **/ | |
2525 | static int sd_remove(struct device *dev) | |
2526 | { | |
601e7638 | 2527 | struct scsi_disk *sdkp; |
1da177e4 | 2528 | |
601e7638 | 2529 | sdkp = dev_get_drvdata(dev); |
478a8a05 AS |
2530 | scsi_autopm_get_device(sdkp->device); |
2531 | ||
2532 | async_synchronize_full(); | |
b391277a | 2533 | blk_queue_prep_rq(sdkp->device->request_queue, scsi_prep_fn); |
82b6d57f | 2534 | blk_queue_unprep_rq(sdkp->device->request_queue, NULL); |
ee959b00 | 2535 | device_del(&sdkp->dev); |
1da177e4 LT |
2536 | del_gendisk(sdkp->disk); |
2537 | sd_shutdown(dev); | |
39b7f1e2 | 2538 | |
0b950672 | 2539 | mutex_lock(&sd_ref_mutex); |
39b7f1e2 | 2540 | dev_set_drvdata(dev, NULL); |
ee959b00 | 2541 | put_device(&sdkp->dev); |
0b950672 | 2542 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
2543 | |
2544 | return 0; | |
2545 | } | |
2546 | ||
2547 | /** | |
2548 | * scsi_disk_release - Called to free the scsi_disk structure | |
ee959b00 | 2549 | * @dev: pointer to embedded class device |
1da177e4 | 2550 | * |
0b950672 | 2551 | * sd_ref_mutex must be held entering this routine. Because it is |
1da177e4 LT |
2552 | * called on last put, you should always use the scsi_disk_get() |
2553 | * scsi_disk_put() helpers which manipulate the semaphore directly | |
ee959b00 | 2554 | * and never do a direct put_device. |
1da177e4 | 2555 | **/ |
ee959b00 | 2556 | static void scsi_disk_release(struct device *dev) |
1da177e4 | 2557 | { |
ee959b00 | 2558 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
1da177e4 LT |
2559 | struct gendisk *disk = sdkp->disk; |
2560 | ||
4034cc68 | 2561 | spin_lock(&sd_index_lock); |
f27bac27 | 2562 | ida_remove(&sd_index_ida, sdkp->index); |
4034cc68 | 2563 | spin_unlock(&sd_index_lock); |
1da177e4 LT |
2564 | |
2565 | disk->private_data = NULL; | |
1da177e4 | 2566 | put_disk(disk); |
39b7f1e2 | 2567 | put_device(&sdkp->device->sdev_gendev); |
1da177e4 LT |
2568 | |
2569 | kfree(sdkp); | |
2570 | } | |
2571 | ||
cc5d2c8c | 2572 | static int sd_start_stop_device(struct scsi_disk *sdkp, int start) |
c3c94c5a TH |
2573 | { |
2574 | unsigned char cmd[6] = { START_STOP }; /* START_VALID */ | |
2575 | struct scsi_sense_hdr sshdr; | |
cc5d2c8c | 2576 | struct scsi_device *sdp = sdkp->device; |
c3c94c5a TH |
2577 | int res; |
2578 | ||
2579 | if (start) | |
2580 | cmd[4] |= 1; /* START */ | |
2581 | ||
d2886ea3 SR |
2582 | if (sdp->start_stop_pwr_cond) |
2583 | cmd[4] |= start ? 1 << 4 : 3 << 4; /* Active or Standby */ | |
2584 | ||
c3c94c5a TH |
2585 | if (!scsi_device_online(sdp)) |
2586 | return -ENODEV; | |
2587 | ||
2588 | res = scsi_execute_req(sdp, cmd, DMA_NONE, NULL, 0, &sshdr, | |
f4f4e47e | 2589 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); |
c3c94c5a | 2590 | if (res) { |
cc5d2c8c JB |
2591 | sd_printk(KERN_WARNING, sdkp, "START_STOP FAILED\n"); |
2592 | sd_print_result(sdkp, res); | |
c3c94c5a | 2593 | if (driver_byte(res) & DRIVER_SENSE) |
cc5d2c8c | 2594 | sd_print_sense_hdr(sdkp, &sshdr); |
c3c94c5a TH |
2595 | } |
2596 | ||
2597 | return res; | |
2598 | } | |
2599 | ||
1da177e4 LT |
2600 | /* |
2601 | * Send a SYNCHRONIZE CACHE instruction down to the device through | |
2602 | * the normal SCSI command structure. Wait for the command to | |
2603 | * complete. | |
2604 | */ | |
2605 | static void sd_shutdown(struct device *dev) | |
2606 | { | |
39b7f1e2 | 2607 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
1da177e4 LT |
2608 | |
2609 | if (!sdkp) | |
2610 | return; /* this can happen */ | |
2611 | ||
39b7f1e2 | 2612 | if (sdkp->WCE) { |
e73aec82 MP |
2613 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
2614 | sd_sync_cache(sdkp); | |
39b7f1e2 | 2615 | } |
c3c94c5a | 2616 | |
cc5d2c8c JB |
2617 | if (system_state != SYSTEM_RESTART && sdkp->device->manage_start_stop) { |
2618 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); | |
2619 | sd_start_stop_device(sdkp, 0); | |
c3c94c5a TH |
2620 | } |
2621 | ||
39b7f1e2 AS |
2622 | scsi_disk_put(sdkp); |
2623 | } | |
1da177e4 | 2624 | |
c3c94c5a TH |
2625 | static int sd_suspend(struct device *dev, pm_message_t mesg) |
2626 | { | |
c3c94c5a | 2627 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
09ff92fe | 2628 | int ret = 0; |
c3c94c5a TH |
2629 | |
2630 | if (!sdkp) | |
2631 | return 0; /* this can happen */ | |
2632 | ||
2633 | if (sdkp->WCE) { | |
cc5d2c8c | 2634 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
c3c94c5a TH |
2635 | ret = sd_sync_cache(sdkp); |
2636 | if (ret) | |
09ff92fe | 2637 | goto done; |
c3c94c5a TH |
2638 | } |
2639 | ||
3a2d5b70 | 2640 | if ((mesg.event & PM_EVENT_SLEEP) && sdkp->device->manage_start_stop) { |
cc5d2c8c JB |
2641 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); |
2642 | ret = sd_start_stop_device(sdkp, 0); | |
c3c94c5a TH |
2643 | } |
2644 | ||
09ff92fe AS |
2645 | done: |
2646 | scsi_disk_put(sdkp); | |
2647 | return ret; | |
c3c94c5a TH |
2648 | } |
2649 | ||
2650 | static int sd_resume(struct device *dev) | |
2651 | { | |
c3c94c5a | 2652 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
09ff92fe | 2653 | int ret = 0; |
c3c94c5a | 2654 | |
cc5d2c8c | 2655 | if (!sdkp->device->manage_start_stop) |
09ff92fe | 2656 | goto done; |
c3c94c5a | 2657 | |
cc5d2c8c | 2658 | sd_printk(KERN_NOTICE, sdkp, "Starting disk\n"); |
09ff92fe | 2659 | ret = sd_start_stop_device(sdkp, 1); |
c3c94c5a | 2660 | |
09ff92fe AS |
2661 | done: |
2662 | scsi_disk_put(sdkp); | |
2663 | return ret; | |
c3c94c5a TH |
2664 | } |
2665 | ||
1da177e4 LT |
2666 | /** |
2667 | * init_sd - entry point for this driver (both when built in or when | |
2668 | * a module). | |
2669 | * | |
2670 | * Note: this function registers this driver with the scsi mid-level. | |
2671 | **/ | |
2672 | static int __init init_sd(void) | |
2673 | { | |
5e4009ba | 2674 | int majors = 0, i, err; |
1da177e4 LT |
2675 | |
2676 | SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n")); | |
2677 | ||
2678 | for (i = 0; i < SD_MAJORS; i++) | |
2679 | if (register_blkdev(sd_major(i), "sd") == 0) | |
2680 | majors++; | |
2681 | ||
2682 | if (!majors) | |
2683 | return -ENODEV; | |
2684 | ||
5e4009ba JG |
2685 | err = class_register(&sd_disk_class); |
2686 | if (err) | |
2687 | goto err_out; | |
6bdaa1f1 | 2688 | |
5e4009ba JG |
2689 | err = scsi_register_driver(&sd_template.gendrv); |
2690 | if (err) | |
2691 | goto err_out_class; | |
2692 | ||
4e7392ec MP |
2693 | sd_cdb_cache = kmem_cache_create("sd_ext_cdb", SD_EXT_CDB_SIZE, |
2694 | 0, 0, NULL); | |
2695 | if (!sd_cdb_cache) { | |
2696 | printk(KERN_ERR "sd: can't init extended cdb cache\n"); | |
2697 | goto err_out_class; | |
2698 | } | |
2699 | ||
2700 | sd_cdb_pool = mempool_create_slab_pool(SD_MEMPOOL_SIZE, sd_cdb_cache); | |
2701 | if (!sd_cdb_pool) { | |
2702 | printk(KERN_ERR "sd: can't init extended cdb pool\n"); | |
2703 | goto err_out_cache; | |
2704 | } | |
2705 | ||
5e4009ba JG |
2706 | return 0; |
2707 | ||
4e7392ec MP |
2708 | err_out_cache: |
2709 | kmem_cache_destroy(sd_cdb_cache); | |
2710 | ||
5e4009ba JG |
2711 | err_out_class: |
2712 | class_unregister(&sd_disk_class); | |
2713 | err_out: | |
2714 | for (i = 0; i < SD_MAJORS; i++) | |
2715 | unregister_blkdev(sd_major(i), "sd"); | |
2716 | return err; | |
1da177e4 LT |
2717 | } |
2718 | ||
2719 | /** | |
2720 | * exit_sd - exit point for this driver (when it is a module). | |
2721 | * | |
2722 | * Note: this function unregisters this driver from the scsi mid-level. | |
2723 | **/ | |
2724 | static void __exit exit_sd(void) | |
2725 | { | |
2726 | int i; | |
2727 | ||
2728 | SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n")); | |
2729 | ||
4e7392ec MP |
2730 | mempool_destroy(sd_cdb_pool); |
2731 | kmem_cache_destroy(sd_cdb_cache); | |
2732 | ||
1da177e4 | 2733 | scsi_unregister_driver(&sd_template.gendrv); |
5e4009ba JG |
2734 | class_unregister(&sd_disk_class); |
2735 | ||
1da177e4 LT |
2736 | for (i = 0; i < SD_MAJORS; i++) |
2737 | unregister_blkdev(sd_major(i), "sd"); | |
2738 | } | |
2739 | ||
1da177e4 LT |
2740 | module_init(init_sd); |
2741 | module_exit(exit_sd); | |
e73aec82 MP |
2742 | |
2743 | static void sd_print_sense_hdr(struct scsi_disk *sdkp, | |
2744 | struct scsi_sense_hdr *sshdr) | |
2745 | { | |
2e4c3329 | 2746 | sd_printk(KERN_INFO, sdkp, " "); |
e73aec82 | 2747 | scsi_show_sense_hdr(sshdr); |
2e4c3329 | 2748 | sd_printk(KERN_INFO, sdkp, " "); |
e73aec82 MP |
2749 | scsi_show_extd_sense(sshdr->asc, sshdr->ascq); |
2750 | } | |
2751 | ||
2752 | static void sd_print_result(struct scsi_disk *sdkp, int result) | |
2753 | { | |
2e4c3329 | 2754 | sd_printk(KERN_INFO, sdkp, " "); |
e73aec82 MP |
2755 | scsi_show_result(result); |
2756 | } | |
2757 |