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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> |
8a6cfeb6 | 49 | #include <linux/smp_lock.h> |
0b950672 | 50 | #include <linux/mutex.h> |
7404ad3b | 51 | #include <linux/string_helpers.h> |
4ace92fc | 52 | #include <linux/async.h> |
5a0e3ad6 | 53 | #include <linux/slab.h> |
1da177e4 | 54 | #include <asm/uaccess.h> |
8f76d151 | 55 | #include <asm/unaligned.h> |
1da177e4 LT |
56 | |
57 | #include <scsi/scsi.h> | |
58 | #include <scsi/scsi_cmnd.h> | |
59 | #include <scsi/scsi_dbg.h> | |
60 | #include <scsi/scsi_device.h> | |
61 | #include <scsi/scsi_driver.h> | |
62 | #include <scsi/scsi_eh.h> | |
63 | #include <scsi/scsi_host.h> | |
64 | #include <scsi/scsi_ioctl.h> | |
1da177e4 LT |
65 | #include <scsi/scsicam.h> |
66 | ||
aa91696e | 67 | #include "sd.h" |
1da177e4 LT |
68 | #include "scsi_logging.h" |
69 | ||
f018fa55 RH |
70 | MODULE_AUTHOR("Eric Youngdale"); |
71 | MODULE_DESCRIPTION("SCSI disk (sd) driver"); | |
72 | MODULE_LICENSE("GPL"); | |
73 | ||
74 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK0_MAJOR); | |
75 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK1_MAJOR); | |
76 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK2_MAJOR); | |
77 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK3_MAJOR); | |
78 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK4_MAJOR); | |
79 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK5_MAJOR); | |
80 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK6_MAJOR); | |
81 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK7_MAJOR); | |
82 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK8_MAJOR); | |
83 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK9_MAJOR); | |
84 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK10_MAJOR); | |
85 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK11_MAJOR); | |
86 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK12_MAJOR); | |
87 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK13_MAJOR); | |
88 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK14_MAJOR); | |
89 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK15_MAJOR); | |
d7b8bcb0 MT |
90 | MODULE_ALIAS_SCSI_DEVICE(TYPE_DISK); |
91 | MODULE_ALIAS_SCSI_DEVICE(TYPE_MOD); | |
92 | MODULE_ALIAS_SCSI_DEVICE(TYPE_RBC); | |
f018fa55 | 93 | |
870d6656 | 94 | #if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT) |
f615b48c | 95 | #define SD_MINORS 16 |
870d6656 | 96 | #else |
3e1a7ff8 | 97 | #define SD_MINORS 0 |
870d6656 TH |
98 | #endif |
99 | ||
7b3d9545 | 100 | static int sd_revalidate_disk(struct gendisk *); |
72ec24bd | 101 | static void sd_unlock_native_capacity(struct gendisk *disk); |
7b3d9545 LT |
102 | static int sd_probe(struct device *); |
103 | static int sd_remove(struct device *); | |
104 | static void sd_shutdown(struct device *); | |
105 | static int sd_suspend(struct device *, pm_message_t state); | |
106 | static int sd_resume(struct device *); | |
107 | static void sd_rescan(struct device *); | |
108 | static int sd_done(struct scsi_cmnd *); | |
109 | static void sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer); | |
ee959b00 | 110 | static void scsi_disk_release(struct device *cdev); |
7b3d9545 LT |
111 | static void sd_print_sense_hdr(struct scsi_disk *, struct scsi_sense_hdr *); |
112 | static void sd_print_result(struct scsi_disk *, int); | |
113 | ||
4034cc68 | 114 | static DEFINE_SPINLOCK(sd_index_lock); |
f27bac27 | 115 | static DEFINE_IDA(sd_index_ida); |
1da177e4 LT |
116 | |
117 | /* This semaphore is used to mediate the 0->1 reference get in the | |
118 | * face of object destruction (i.e. we can't allow a get on an | |
119 | * object after last put) */ | |
0b950672 | 120 | static DEFINE_MUTEX(sd_ref_mutex); |
1da177e4 | 121 | |
4e7392ec MP |
122 | struct kmem_cache *sd_cdb_cache; |
123 | mempool_t *sd_cdb_pool; | |
124 | ||
6bdaa1f1 JB |
125 | static const char *sd_cache_types[] = { |
126 | "write through", "none", "write back", | |
127 | "write back, no read (daft)" | |
128 | }; | |
129 | ||
ee959b00 TJ |
130 | static ssize_t |
131 | sd_store_cache_type(struct device *dev, struct device_attribute *attr, | |
132 | const char *buf, size_t count) | |
6bdaa1f1 JB |
133 | { |
134 | int i, ct = -1, rcd, wce, sp; | |
ee959b00 | 135 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
136 | struct scsi_device *sdp = sdkp->device; |
137 | char buffer[64]; | |
138 | char *buffer_data; | |
139 | struct scsi_mode_data data; | |
140 | struct scsi_sense_hdr sshdr; | |
141 | int len; | |
142 | ||
143 | if (sdp->type != TYPE_DISK) | |
144 | /* no cache control on RBC devices; theoretically they | |
145 | * can do it, but there's probably so many exceptions | |
146 | * it's not worth the risk */ | |
147 | return -EINVAL; | |
148 | ||
6391a113 | 149 | for (i = 0; i < ARRAY_SIZE(sd_cache_types); i++) { |
6bdaa1f1 JB |
150 | const int len = strlen(sd_cache_types[i]); |
151 | if (strncmp(sd_cache_types[i], buf, len) == 0 && | |
152 | buf[len] == '\n') { | |
153 | ct = i; | |
154 | break; | |
155 | } | |
156 | } | |
157 | if (ct < 0) | |
158 | return -EINVAL; | |
159 | rcd = ct & 0x01 ? 1 : 0; | |
160 | wce = ct & 0x02 ? 1 : 0; | |
161 | if (scsi_mode_sense(sdp, 0x08, 8, buffer, sizeof(buffer), SD_TIMEOUT, | |
162 | SD_MAX_RETRIES, &data, NULL)) | |
163 | return -EINVAL; | |
a9312fb8 | 164 | len = min_t(size_t, sizeof(buffer), data.length - data.header_length - |
6bdaa1f1 JB |
165 | data.block_descriptor_length); |
166 | buffer_data = buffer + data.header_length + | |
167 | data.block_descriptor_length; | |
168 | buffer_data[2] &= ~0x05; | |
169 | buffer_data[2] |= wce << 2 | rcd; | |
170 | sp = buffer_data[0] & 0x80 ? 1 : 0; | |
171 | ||
172 | if (scsi_mode_select(sdp, 1, sp, 8, buffer_data, len, SD_TIMEOUT, | |
173 | SD_MAX_RETRIES, &data, &sshdr)) { | |
174 | if (scsi_sense_valid(&sshdr)) | |
e73aec82 | 175 | sd_print_sense_hdr(sdkp, &sshdr); |
6bdaa1f1 JB |
176 | return -EINVAL; |
177 | } | |
f98a8cae | 178 | revalidate_disk(sdkp->disk); |
6bdaa1f1 JB |
179 | return count; |
180 | } | |
181 | ||
ee959b00 TJ |
182 | static ssize_t |
183 | sd_store_manage_start_stop(struct device *dev, struct device_attribute *attr, | |
184 | const char *buf, size_t count) | |
c3c94c5a | 185 | { |
ee959b00 | 186 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
c3c94c5a TH |
187 | struct scsi_device *sdp = sdkp->device; |
188 | ||
189 | if (!capable(CAP_SYS_ADMIN)) | |
190 | return -EACCES; | |
191 | ||
192 | sdp->manage_start_stop = simple_strtoul(buf, NULL, 10); | |
193 | ||
194 | return count; | |
195 | } | |
196 | ||
ee959b00 TJ |
197 | static ssize_t |
198 | sd_store_allow_restart(struct device *dev, struct device_attribute *attr, | |
199 | const char *buf, size_t count) | |
a144c5ae | 200 | { |
ee959b00 | 201 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
a144c5ae BK |
202 | struct scsi_device *sdp = sdkp->device; |
203 | ||
204 | if (!capable(CAP_SYS_ADMIN)) | |
205 | return -EACCES; | |
206 | ||
207 | if (sdp->type != TYPE_DISK) | |
208 | return -EINVAL; | |
209 | ||
210 | sdp->allow_restart = simple_strtoul(buf, NULL, 10); | |
211 | ||
212 | return count; | |
213 | } | |
214 | ||
ee959b00 TJ |
215 | static ssize_t |
216 | sd_show_cache_type(struct device *dev, struct device_attribute *attr, | |
217 | char *buf) | |
6bdaa1f1 | 218 | { |
ee959b00 | 219 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
220 | int ct = sdkp->RCD + 2*sdkp->WCE; |
221 | ||
222 | return snprintf(buf, 40, "%s\n", sd_cache_types[ct]); | |
223 | } | |
224 | ||
ee959b00 TJ |
225 | static ssize_t |
226 | sd_show_fua(struct device *dev, struct device_attribute *attr, char *buf) | |
6bdaa1f1 | 227 | { |
ee959b00 | 228 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
229 | |
230 | return snprintf(buf, 20, "%u\n", sdkp->DPOFUA); | |
231 | } | |
232 | ||
ee959b00 TJ |
233 | static ssize_t |
234 | sd_show_manage_start_stop(struct device *dev, struct device_attribute *attr, | |
235 | char *buf) | |
c3c94c5a | 236 | { |
ee959b00 | 237 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
c3c94c5a TH |
238 | struct scsi_device *sdp = sdkp->device; |
239 | ||
240 | return snprintf(buf, 20, "%u\n", sdp->manage_start_stop); | |
241 | } | |
242 | ||
ee959b00 TJ |
243 | static ssize_t |
244 | sd_show_allow_restart(struct device *dev, struct device_attribute *attr, | |
245 | char *buf) | |
a144c5ae | 246 | { |
ee959b00 | 247 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
a144c5ae BK |
248 | |
249 | return snprintf(buf, 40, "%d\n", sdkp->device->allow_restart); | |
250 | } | |
251 | ||
e0597d70 MP |
252 | static ssize_t |
253 | sd_show_protection_type(struct device *dev, struct device_attribute *attr, | |
254 | char *buf) | |
255 | { | |
256 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
257 | ||
258 | return snprintf(buf, 20, "%u\n", sdkp->protection_type); | |
259 | } | |
260 | ||
261 | static ssize_t | |
262 | sd_show_app_tag_own(struct device *dev, struct device_attribute *attr, | |
263 | char *buf) | |
264 | { | |
265 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
266 | ||
267 | return snprintf(buf, 20, "%u\n", sdkp->ATO); | |
268 | } | |
269 | ||
e339c1a7 MP |
270 | static ssize_t |
271 | sd_show_thin_provisioning(struct device *dev, struct device_attribute *attr, | |
272 | char *buf) | |
273 | { | |
274 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
275 | ||
276 | return snprintf(buf, 20, "%u\n", sdkp->thin_provisioning); | |
277 | } | |
278 | ||
ee959b00 | 279 | static struct device_attribute sd_disk_attrs[] = { |
6bdaa1f1 JB |
280 | __ATTR(cache_type, S_IRUGO|S_IWUSR, sd_show_cache_type, |
281 | sd_store_cache_type), | |
282 | __ATTR(FUA, S_IRUGO, sd_show_fua, NULL), | |
a144c5ae BK |
283 | __ATTR(allow_restart, S_IRUGO|S_IWUSR, sd_show_allow_restart, |
284 | sd_store_allow_restart), | |
c3c94c5a TH |
285 | __ATTR(manage_start_stop, S_IRUGO|S_IWUSR, sd_show_manage_start_stop, |
286 | sd_store_manage_start_stop), | |
e0597d70 MP |
287 | __ATTR(protection_type, S_IRUGO, sd_show_protection_type, NULL), |
288 | __ATTR(app_tag_own, S_IRUGO, sd_show_app_tag_own, NULL), | |
e339c1a7 | 289 | __ATTR(thin_provisioning, S_IRUGO, sd_show_thin_provisioning, NULL), |
6bdaa1f1 JB |
290 | __ATTR_NULL, |
291 | }; | |
292 | ||
293 | static struct class sd_disk_class = { | |
294 | .name = "scsi_disk", | |
295 | .owner = THIS_MODULE, | |
ee959b00 TJ |
296 | .dev_release = scsi_disk_release, |
297 | .dev_attrs = sd_disk_attrs, | |
6bdaa1f1 | 298 | }; |
1da177e4 LT |
299 | |
300 | static struct scsi_driver sd_template = { | |
301 | .owner = THIS_MODULE, | |
302 | .gendrv = { | |
303 | .name = "sd", | |
304 | .probe = sd_probe, | |
305 | .remove = sd_remove, | |
c3c94c5a TH |
306 | .suspend = sd_suspend, |
307 | .resume = sd_resume, | |
1da177e4 LT |
308 | .shutdown = sd_shutdown, |
309 | }, | |
310 | .rescan = sd_rescan, | |
7b3d9545 | 311 | .done = sd_done, |
1da177e4 LT |
312 | }; |
313 | ||
314 | /* | |
315 | * Device no to disk mapping: | |
316 | * | |
317 | * major disc2 disc p1 | |
318 | * |............|.............|....|....| <- dev_t | |
319 | * 31 20 19 8 7 4 3 0 | |
320 | * | |
321 | * Inside a major, we have 16k disks, however mapped non- | |
322 | * contiguously. The first 16 disks are for major0, the next | |
323 | * ones with major1, ... Disk 256 is for major0 again, disk 272 | |
324 | * for major1, ... | |
325 | * As we stay compatible with our numbering scheme, we can reuse | |
326 | * the well-know SCSI majors 8, 65--71, 136--143. | |
327 | */ | |
328 | static int sd_major(int major_idx) | |
329 | { | |
330 | switch (major_idx) { | |
331 | case 0: | |
332 | return SCSI_DISK0_MAJOR; | |
333 | case 1 ... 7: | |
334 | return SCSI_DISK1_MAJOR + major_idx - 1; | |
335 | case 8 ... 15: | |
336 | return SCSI_DISK8_MAJOR + major_idx - 8; | |
337 | default: | |
338 | BUG(); | |
339 | return 0; /* shut up gcc */ | |
340 | } | |
341 | } | |
342 | ||
39b7f1e2 | 343 | static struct scsi_disk *__scsi_disk_get(struct gendisk *disk) |
1da177e4 LT |
344 | { |
345 | struct scsi_disk *sdkp = NULL; | |
346 | ||
39b7f1e2 AS |
347 | if (disk->private_data) { |
348 | sdkp = scsi_disk(disk); | |
349 | if (scsi_device_get(sdkp->device) == 0) | |
ee959b00 | 350 | get_device(&sdkp->dev); |
39b7f1e2 AS |
351 | else |
352 | sdkp = NULL; | |
353 | } | |
354 | return sdkp; | |
355 | } | |
356 | ||
357 | static struct scsi_disk *scsi_disk_get(struct gendisk *disk) | |
358 | { | |
359 | struct scsi_disk *sdkp; | |
360 | ||
0b950672 | 361 | mutex_lock(&sd_ref_mutex); |
39b7f1e2 | 362 | sdkp = __scsi_disk_get(disk); |
0b950672 | 363 | mutex_unlock(&sd_ref_mutex); |
1da177e4 | 364 | return sdkp; |
39b7f1e2 | 365 | } |
1da177e4 | 366 | |
39b7f1e2 AS |
367 | static struct scsi_disk *scsi_disk_get_from_dev(struct device *dev) |
368 | { | |
369 | struct scsi_disk *sdkp; | |
370 | ||
0b950672 | 371 | mutex_lock(&sd_ref_mutex); |
39b7f1e2 AS |
372 | sdkp = dev_get_drvdata(dev); |
373 | if (sdkp) | |
374 | sdkp = __scsi_disk_get(sdkp->disk); | |
0b950672 | 375 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
376 | return sdkp; |
377 | } | |
378 | ||
379 | static void scsi_disk_put(struct scsi_disk *sdkp) | |
380 | { | |
381 | struct scsi_device *sdev = sdkp->device; | |
382 | ||
0b950672 | 383 | mutex_lock(&sd_ref_mutex); |
ee959b00 | 384 | put_device(&sdkp->dev); |
1da177e4 | 385 | scsi_device_put(sdev); |
0b950672 | 386 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
387 | } |
388 | ||
35e1a5d9 MP |
389 | static void sd_prot_op(struct scsi_cmnd *scmd, unsigned int dif) |
390 | { | |
391 | unsigned int prot_op = SCSI_PROT_NORMAL; | |
392 | unsigned int dix = scsi_prot_sg_count(scmd); | |
393 | ||
394 | if (scmd->sc_data_direction == DMA_FROM_DEVICE) { | |
395 | if (dif && dix) | |
396 | prot_op = SCSI_PROT_READ_PASS; | |
397 | else if (dif && !dix) | |
398 | prot_op = SCSI_PROT_READ_STRIP; | |
399 | else if (!dif && dix) | |
400 | prot_op = SCSI_PROT_READ_INSERT; | |
401 | } else { | |
402 | if (dif && dix) | |
403 | prot_op = SCSI_PROT_WRITE_PASS; | |
404 | else if (dif && !dix) | |
405 | prot_op = SCSI_PROT_WRITE_INSERT; | |
406 | else if (!dif && dix) | |
407 | prot_op = SCSI_PROT_WRITE_STRIP; | |
408 | } | |
409 | ||
410 | scsi_set_prot_op(scmd, prot_op); | |
411 | scsi_set_prot_type(scmd, dif); | |
412 | } | |
413 | ||
e339c1a7 | 414 | /** |
66ac0280 CH |
415 | * scsi_setup_discard_cmnd - unmap blocks on thinly provisioned device |
416 | * @sdp: scsi device to operate one | |
e339c1a7 MP |
417 | * @rq: Request to prepare |
418 | * | |
419 | * Will issue either UNMAP or WRITE SAME(16) depending on preference | |
420 | * indicated by target device. | |
421 | **/ | |
66ac0280 | 422 | static int scsi_setup_discard_cmnd(struct scsi_device *sdp, struct request *rq) |
e339c1a7 MP |
423 | { |
424 | struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); | |
425 | struct bio *bio = rq->bio; | |
426 | sector_t sector = bio->bi_sector; | |
66ac0280 CH |
427 | unsigned int nr_sectors = bio_sectors(bio); |
428 | unsigned int len; | |
f1126e95 | 429 | int ret; |
66ac0280 | 430 | struct page *page; |
e339c1a7 MP |
431 | |
432 | if (sdkp->device->sector_size == 4096) { | |
433 | sector >>= 3; | |
66ac0280 | 434 | nr_sectors >>= 3; |
e339c1a7 MP |
435 | } |
436 | ||
437 | rq->cmd_type = REQ_TYPE_BLOCK_PC; | |
438 | rq->timeout = SD_TIMEOUT; | |
439 | ||
440 | memset(rq->cmd, 0, rq->cmd_len); | |
441 | ||
66ac0280 CH |
442 | page = alloc_page(GFP_ATOMIC | __GFP_ZERO); |
443 | if (!page) | |
444 | return BLKPREP_DEFER; | |
445 | ||
e339c1a7 | 446 | if (sdkp->unmap) { |
66ac0280 | 447 | char *buf = page_address(page); |
e339c1a7 | 448 | |
66ac0280 | 449 | rq->cmd_len = 10; |
e339c1a7 MP |
450 | rq->cmd[0] = UNMAP; |
451 | rq->cmd[8] = 24; | |
e339c1a7 MP |
452 | |
453 | put_unaligned_be16(6 + 16, &buf[0]); | |
454 | put_unaligned_be16(16, &buf[2]); | |
455 | put_unaligned_be64(sector, &buf[8]); | |
66ac0280 | 456 | put_unaligned_be32(nr_sectors, &buf[16]); |
e339c1a7 | 457 | |
66ac0280 | 458 | len = 24; |
e339c1a7 | 459 | } else { |
66ac0280 | 460 | rq->cmd_len = 16; |
e339c1a7 MP |
461 | rq->cmd[0] = WRITE_SAME_16; |
462 | rq->cmd[1] = 0x8; /* UNMAP */ | |
463 | put_unaligned_be64(sector, &rq->cmd[2]); | |
66ac0280 CH |
464 | put_unaligned_be32(nr_sectors, &rq->cmd[10]); |
465 | ||
466 | len = sdkp->device->sector_size; | |
e339c1a7 MP |
467 | } |
468 | ||
66ac0280 | 469 | blk_add_request_payload(rq, page, len); |
f1126e95 FT |
470 | ret = scsi_setup_blk_pc_cmnd(sdp, rq); |
471 | rq->buffer = page_address(page); | |
610a6349 FT |
472 | if (ret != BLKPREP_OK) { |
473 | __free_page(page); | |
474 | rq->buffer = NULL; | |
475 | } | |
f1126e95 FT |
476 | return ret; |
477 | } | |
478 | ||
90467c29 FT |
479 | static int scsi_setup_flush_cmnd(struct scsi_device *sdp, struct request *rq) |
480 | { | |
481 | /* for now, we use REQ_TYPE_BLOCK_PC. */ | |
482 | rq->cmd_type = REQ_TYPE_BLOCK_PC; | |
483 | rq->timeout = SD_TIMEOUT; | |
484 | rq->retries = SD_MAX_RETRIES; | |
485 | rq->cmd[0] = SYNCHRONIZE_CACHE; | |
486 | rq->cmd_len = 10; | |
487 | ||
488 | return scsi_setup_blk_pc_cmnd(sdp, rq); | |
489 | } | |
490 | ||
f1126e95 FT |
491 | static void sd_unprep_fn(struct request_queue *q, struct request *rq) |
492 | { | |
610a6349 FT |
493 | if (rq->cmd_flags & REQ_DISCARD) { |
494 | free_page((unsigned long)rq->buffer); | |
495 | rq->buffer = NULL; | |
496 | } | |
e339c1a7 MP |
497 | } |
498 | ||
1da177e4 LT |
499 | /** |
500 | * sd_init_command - build a scsi (read or write) command from | |
501 | * information in the request structure. | |
502 | * @SCpnt: pointer to mid-level's per scsi command structure that | |
503 | * contains request and into which the scsi command is written | |
504 | * | |
505 | * Returns 1 if successful and 0 if error (or cannot be done now). | |
506 | **/ | |
7f9a6bc4 | 507 | static int sd_prep_fn(struct request_queue *q, struct request *rq) |
1da177e4 | 508 | { |
7f9a6bc4 JB |
509 | struct scsi_cmnd *SCpnt; |
510 | struct scsi_device *sdp = q->queuedata; | |
776b23a0 | 511 | struct gendisk *disk = rq->rq_disk; |
af55ff67 | 512 | struct scsi_disk *sdkp; |
83096ebf | 513 | sector_t block = blk_rq_pos(rq); |
18351070 | 514 | sector_t threshold; |
83096ebf | 515 | unsigned int this_count = blk_rq_sectors(rq); |
bd623e79 | 516 | int ret, host_dif; |
4e7392ec | 517 | unsigned char protect; |
7f9a6bc4 | 518 | |
e339c1a7 MP |
519 | /* |
520 | * Discard request come in as REQ_TYPE_FS but we turn them into | |
521 | * block PC requests to make life easier. | |
522 | */ | |
66ac0280 CH |
523 | if (rq->cmd_flags & REQ_DISCARD) { |
524 | ret = scsi_setup_discard_cmnd(sdp, rq); | |
525 | goto out; | |
90467c29 FT |
526 | } else if (rq->cmd_flags & REQ_FLUSH) { |
527 | ret = scsi_setup_flush_cmnd(sdp, rq); | |
528 | goto out; | |
66ac0280 | 529 | } else if (rq->cmd_type == REQ_TYPE_BLOCK_PC) { |
7f9a6bc4 JB |
530 | ret = scsi_setup_blk_pc_cmnd(sdp, rq); |
531 | goto out; | |
532 | } else if (rq->cmd_type != REQ_TYPE_FS) { | |
533 | ret = BLKPREP_KILL; | |
534 | goto out; | |
535 | } | |
536 | ret = scsi_setup_fs_cmnd(sdp, rq); | |
537 | if (ret != BLKPREP_OK) | |
538 | goto out; | |
539 | SCpnt = rq->special; | |
af55ff67 | 540 | sdkp = scsi_disk(disk); |
7f9a6bc4 JB |
541 | |
542 | /* from here on until we're complete, any goto out | |
543 | * is used for a killable error condition */ | |
544 | ret = BLKPREP_KILL; | |
1da177e4 | 545 | |
fa0d34be MP |
546 | SCSI_LOG_HLQUEUE(1, scmd_printk(KERN_INFO, SCpnt, |
547 | "sd_init_command: block=%llu, " | |
548 | "count=%d\n", | |
549 | (unsigned long long)block, | |
550 | this_count)); | |
1da177e4 LT |
551 | |
552 | if (!sdp || !scsi_device_online(sdp) || | |
83096ebf | 553 | block + blk_rq_sectors(rq) > get_capacity(disk)) { |
fa0d34be | 554 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
83096ebf TH |
555 | "Finishing %u sectors\n", |
556 | blk_rq_sectors(rq))); | |
fa0d34be MP |
557 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
558 | "Retry with 0x%p\n", SCpnt)); | |
7f9a6bc4 | 559 | goto out; |
1da177e4 LT |
560 | } |
561 | ||
562 | if (sdp->changed) { | |
563 | /* | |
564 | * quietly refuse to do anything to a changed disc until | |
565 | * the changed bit has been reset | |
566 | */ | |
567 | /* printk("SCSI disk has been changed. Prohibiting further I/O.\n"); */ | |
7f9a6bc4 | 568 | goto out; |
1da177e4 | 569 | } |
7f9a6bc4 | 570 | |
a0899d4d | 571 | /* |
18351070 LT |
572 | * Some SD card readers can't handle multi-sector accesses which touch |
573 | * the last one or two hardware sectors. Split accesses as needed. | |
a0899d4d | 574 | */ |
18351070 LT |
575 | threshold = get_capacity(disk) - SD_LAST_BUGGY_SECTORS * |
576 | (sdp->sector_size / 512); | |
577 | ||
578 | if (unlikely(sdp->last_sector_bug && block + this_count > threshold)) { | |
579 | if (block < threshold) { | |
580 | /* Access up to the threshold but not beyond */ | |
581 | this_count = threshold - block; | |
582 | } else { | |
583 | /* Access only a single hardware sector */ | |
584 | this_count = sdp->sector_size / 512; | |
585 | } | |
586 | } | |
a0899d4d | 587 | |
fa0d34be MP |
588 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, "block=%llu\n", |
589 | (unsigned long long)block)); | |
1da177e4 LT |
590 | |
591 | /* | |
592 | * If we have a 1K hardware sectorsize, prevent access to single | |
593 | * 512 byte sectors. In theory we could handle this - in fact | |
594 | * the scsi cdrom driver must be able to handle this because | |
595 | * we typically use 1K blocksizes, and cdroms typically have | |
596 | * 2K hardware sectorsizes. Of course, things are simpler | |
597 | * with the cdrom, since it is read-only. For performance | |
598 | * reasons, the filesystems should be able to handle this | |
599 | * and not force the scsi disk driver to use bounce buffers | |
600 | * for this. | |
601 | */ | |
602 | if (sdp->sector_size == 1024) { | |
83096ebf | 603 | if ((block & 1) || (blk_rq_sectors(rq) & 1)) { |
e73aec82 MP |
604 | scmd_printk(KERN_ERR, SCpnt, |
605 | "Bad block number requested\n"); | |
7f9a6bc4 | 606 | goto out; |
1da177e4 LT |
607 | } else { |
608 | block = block >> 1; | |
609 | this_count = this_count >> 1; | |
610 | } | |
611 | } | |
612 | if (sdp->sector_size == 2048) { | |
83096ebf | 613 | if ((block & 3) || (blk_rq_sectors(rq) & 3)) { |
e73aec82 MP |
614 | scmd_printk(KERN_ERR, SCpnt, |
615 | "Bad block number requested\n"); | |
7f9a6bc4 | 616 | goto out; |
1da177e4 LT |
617 | } else { |
618 | block = block >> 2; | |
619 | this_count = this_count >> 2; | |
620 | } | |
621 | } | |
622 | if (sdp->sector_size == 4096) { | |
83096ebf | 623 | if ((block & 7) || (blk_rq_sectors(rq) & 7)) { |
e73aec82 MP |
624 | scmd_printk(KERN_ERR, SCpnt, |
625 | "Bad block number requested\n"); | |
7f9a6bc4 | 626 | goto out; |
1da177e4 LT |
627 | } else { |
628 | block = block >> 3; | |
629 | this_count = this_count >> 3; | |
630 | } | |
631 | } | |
632 | if (rq_data_dir(rq) == WRITE) { | |
633 | if (!sdp->writeable) { | |
7f9a6bc4 | 634 | goto out; |
1da177e4 LT |
635 | } |
636 | SCpnt->cmnd[0] = WRITE_6; | |
637 | SCpnt->sc_data_direction = DMA_TO_DEVICE; | |
af55ff67 MP |
638 | |
639 | if (blk_integrity_rq(rq) && | |
640 | sd_dif_prepare(rq, block, sdp->sector_size) == -EIO) | |
641 | goto out; | |
642 | ||
1da177e4 LT |
643 | } else if (rq_data_dir(rq) == READ) { |
644 | SCpnt->cmnd[0] = READ_6; | |
645 | SCpnt->sc_data_direction = DMA_FROM_DEVICE; | |
646 | } else { | |
e73aec82 | 647 | scmd_printk(KERN_ERR, SCpnt, "Unknown command %x\n", rq->cmd_flags); |
7f9a6bc4 | 648 | goto out; |
1da177e4 LT |
649 | } |
650 | ||
fa0d34be | 651 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
83096ebf | 652 | "%s %d/%u 512 byte blocks.\n", |
fa0d34be MP |
653 | (rq_data_dir(rq) == WRITE) ? |
654 | "writing" : "reading", this_count, | |
83096ebf | 655 | blk_rq_sectors(rq))); |
1da177e4 | 656 | |
af55ff67 | 657 | /* Set RDPROTECT/WRPROTECT if disk is formatted with DIF */ |
bd623e79 MP |
658 | host_dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type); |
659 | if (host_dif) | |
4e7392ec | 660 | protect = 1 << 5; |
af55ff67 | 661 | else |
4e7392ec MP |
662 | protect = 0; |
663 | ||
664 | if (host_dif == SD_DIF_TYPE2_PROTECTION) { | |
665 | SCpnt->cmnd = mempool_alloc(sd_cdb_pool, GFP_ATOMIC); | |
666 | ||
667 | if (unlikely(SCpnt->cmnd == NULL)) { | |
668 | ret = BLKPREP_DEFER; | |
669 | goto out; | |
670 | } | |
af55ff67 | 671 | |
4e7392ec MP |
672 | SCpnt->cmd_len = SD_EXT_CDB_SIZE; |
673 | memset(SCpnt->cmnd, 0, SCpnt->cmd_len); | |
674 | SCpnt->cmnd[0] = VARIABLE_LENGTH_CMD; | |
675 | SCpnt->cmnd[7] = 0x18; | |
676 | SCpnt->cmnd[9] = (rq_data_dir(rq) == READ) ? READ_32 : WRITE_32; | |
33659ebb | 677 | SCpnt->cmnd[10] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
4e7392ec MP |
678 | |
679 | /* LBA */ | |
680 | SCpnt->cmnd[12] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0; | |
681 | SCpnt->cmnd[13] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0; | |
682 | SCpnt->cmnd[14] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0; | |
683 | SCpnt->cmnd[15] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0; | |
684 | SCpnt->cmnd[16] = (unsigned char) (block >> 24) & 0xff; | |
685 | SCpnt->cmnd[17] = (unsigned char) (block >> 16) & 0xff; | |
686 | SCpnt->cmnd[18] = (unsigned char) (block >> 8) & 0xff; | |
687 | SCpnt->cmnd[19] = (unsigned char) block & 0xff; | |
688 | ||
689 | /* Expected Indirect LBA */ | |
690 | SCpnt->cmnd[20] = (unsigned char) (block >> 24) & 0xff; | |
691 | SCpnt->cmnd[21] = (unsigned char) (block >> 16) & 0xff; | |
692 | SCpnt->cmnd[22] = (unsigned char) (block >> 8) & 0xff; | |
693 | SCpnt->cmnd[23] = (unsigned char) block & 0xff; | |
694 | ||
695 | /* Transfer length */ | |
696 | SCpnt->cmnd[28] = (unsigned char) (this_count >> 24) & 0xff; | |
697 | SCpnt->cmnd[29] = (unsigned char) (this_count >> 16) & 0xff; | |
698 | SCpnt->cmnd[30] = (unsigned char) (this_count >> 8) & 0xff; | |
699 | SCpnt->cmnd[31] = (unsigned char) this_count & 0xff; | |
700 | } else if (block > 0xffffffff) { | |
1da177e4 | 701 | SCpnt->cmnd[0] += READ_16 - READ_6; |
33659ebb | 702 | SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
1da177e4 LT |
703 | SCpnt->cmnd[2] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0; |
704 | SCpnt->cmnd[3] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0; | |
705 | SCpnt->cmnd[4] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0; | |
706 | SCpnt->cmnd[5] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0; | |
707 | SCpnt->cmnd[6] = (unsigned char) (block >> 24) & 0xff; | |
708 | SCpnt->cmnd[7] = (unsigned char) (block >> 16) & 0xff; | |
709 | SCpnt->cmnd[8] = (unsigned char) (block >> 8) & 0xff; | |
710 | SCpnt->cmnd[9] = (unsigned char) block & 0xff; | |
711 | SCpnt->cmnd[10] = (unsigned char) (this_count >> 24) & 0xff; | |
712 | SCpnt->cmnd[11] = (unsigned char) (this_count >> 16) & 0xff; | |
713 | SCpnt->cmnd[12] = (unsigned char) (this_count >> 8) & 0xff; | |
714 | SCpnt->cmnd[13] = (unsigned char) this_count & 0xff; | |
715 | SCpnt->cmnd[14] = SCpnt->cmnd[15] = 0; | |
716 | } else if ((this_count > 0xff) || (block > 0x1fffff) || | |
af55ff67 | 717 | scsi_device_protection(SCpnt->device) || |
1da177e4 LT |
718 | SCpnt->device->use_10_for_rw) { |
719 | if (this_count > 0xffff) | |
720 | this_count = 0xffff; | |
721 | ||
722 | SCpnt->cmnd[0] += READ_10 - READ_6; | |
33659ebb | 723 | SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
1da177e4 LT |
724 | SCpnt->cmnd[2] = (unsigned char) (block >> 24) & 0xff; |
725 | SCpnt->cmnd[3] = (unsigned char) (block >> 16) & 0xff; | |
726 | SCpnt->cmnd[4] = (unsigned char) (block >> 8) & 0xff; | |
727 | SCpnt->cmnd[5] = (unsigned char) block & 0xff; | |
728 | SCpnt->cmnd[6] = SCpnt->cmnd[9] = 0; | |
729 | SCpnt->cmnd[7] = (unsigned char) (this_count >> 8) & 0xff; | |
730 | SCpnt->cmnd[8] = (unsigned char) this_count & 0xff; | |
731 | } else { | |
33659ebb | 732 | if (unlikely(rq->cmd_flags & REQ_FUA)) { |
007365ad TH |
733 | /* |
734 | * This happens only if this drive failed | |
735 | * 10byte rw command with ILLEGAL_REQUEST | |
736 | * during operation and thus turned off | |
737 | * use_10_for_rw. | |
738 | */ | |
e73aec82 MP |
739 | scmd_printk(KERN_ERR, SCpnt, |
740 | "FUA write on READ/WRITE(6) drive\n"); | |
7f9a6bc4 | 741 | goto out; |
007365ad TH |
742 | } |
743 | ||
1da177e4 LT |
744 | SCpnt->cmnd[1] |= (unsigned char) ((block >> 16) & 0x1f); |
745 | SCpnt->cmnd[2] = (unsigned char) ((block >> 8) & 0xff); | |
746 | SCpnt->cmnd[3] = (unsigned char) block & 0xff; | |
747 | SCpnt->cmnd[4] = (unsigned char) this_count; | |
748 | SCpnt->cmnd[5] = 0; | |
749 | } | |
30b0c37b | 750 | SCpnt->sdb.length = this_count * sdp->sector_size; |
1da177e4 | 751 | |
af55ff67 | 752 | /* If DIF or DIX is enabled, tell HBA how to handle request */ |
bd623e79 | 753 | if (host_dif || scsi_prot_sg_count(SCpnt)) |
35e1a5d9 | 754 | sd_prot_op(SCpnt, host_dif); |
af55ff67 | 755 | |
1da177e4 LT |
756 | /* |
757 | * We shouldn't disconnect in the middle of a sector, so with a dumb | |
758 | * host adapter, it's safe to assume that we can at least transfer | |
759 | * this many bytes between each connect / disconnect. | |
760 | */ | |
761 | SCpnt->transfersize = sdp->sector_size; | |
762 | SCpnt->underflow = this_count << 9; | |
763 | SCpnt->allowed = SD_MAX_RETRIES; | |
1da177e4 | 764 | |
1da177e4 LT |
765 | /* |
766 | * This indicates that the command is ready from our end to be | |
767 | * queued. | |
768 | */ | |
7f9a6bc4 JB |
769 | ret = BLKPREP_OK; |
770 | out: | |
771 | return scsi_prep_return(q, rq, ret); | |
1da177e4 LT |
772 | } |
773 | ||
774 | /** | |
775 | * sd_open - open a scsi disk device | |
776 | * @inode: only i_rdev member may be used | |
777 | * @filp: only f_mode and f_flags may be used | |
778 | * | |
779 | * Returns 0 if successful. Returns a negated errno value in case | |
780 | * of error. | |
781 | * | |
782 | * Note: This can be called from a user context (e.g. fsck(1) ) | |
783 | * or from within the kernel (e.g. as a result of a mount(1) ). | |
784 | * In the latter case @inode and @filp carry an abridged amount | |
785 | * of information as noted above. | |
786 | **/ | |
0338e291 | 787 | static int sd_open(struct block_device *bdev, fmode_t mode) |
1da177e4 | 788 | { |
0338e291 | 789 | struct scsi_disk *sdkp = scsi_disk_get(bdev->bd_disk); |
1da177e4 LT |
790 | struct scsi_device *sdev; |
791 | int retval; | |
792 | ||
0338e291 | 793 | if (!sdkp) |
1da177e4 LT |
794 | return -ENXIO; |
795 | ||
fa0d34be | 796 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_open\n")); |
1da177e4 | 797 | |
6e9624b8 | 798 | lock_kernel(); |
1da177e4 LT |
799 | sdev = sdkp->device; |
800 | ||
801 | /* | |
802 | * If the device is in error recovery, wait until it is done. | |
803 | * If the device is offline, then disallow any access to it. | |
804 | */ | |
805 | retval = -ENXIO; | |
806 | if (!scsi_block_when_processing_errors(sdev)) | |
807 | goto error_out; | |
808 | ||
809 | if (sdev->removable || sdkp->write_prot) | |
0338e291 | 810 | check_disk_change(bdev); |
1da177e4 LT |
811 | |
812 | /* | |
813 | * If the drive is empty, just let the open fail. | |
814 | */ | |
815 | retval = -ENOMEDIUM; | |
0338e291 | 816 | if (sdev->removable && !sdkp->media_present && !(mode & FMODE_NDELAY)) |
1da177e4 LT |
817 | goto error_out; |
818 | ||
819 | /* | |
820 | * If the device has the write protect tab set, have the open fail | |
821 | * if the user expects to be able to write to the thing. | |
822 | */ | |
823 | retval = -EROFS; | |
0338e291 | 824 | if (sdkp->write_prot && (mode & FMODE_WRITE)) |
1da177e4 LT |
825 | goto error_out; |
826 | ||
827 | /* | |
828 | * It is possible that the disk changing stuff resulted in | |
829 | * the device being taken offline. If this is the case, | |
830 | * report this to the user, and don't pretend that the | |
831 | * open actually succeeded. | |
832 | */ | |
833 | retval = -ENXIO; | |
834 | if (!scsi_device_online(sdev)) | |
835 | goto error_out; | |
836 | ||
837 | if (!sdkp->openers++ && sdev->removable) { | |
838 | if (scsi_block_when_processing_errors(sdev)) | |
839 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT); | |
840 | } | |
841 | ||
6e9624b8 | 842 | unlock_kernel(); |
1da177e4 LT |
843 | return 0; |
844 | ||
845 | error_out: | |
846 | scsi_disk_put(sdkp); | |
6e9624b8 | 847 | unlock_kernel(); |
1da177e4 LT |
848 | return retval; |
849 | } | |
850 | ||
851 | /** | |
852 | * sd_release - invoked when the (last) close(2) is called on this | |
853 | * scsi disk. | |
854 | * @inode: only i_rdev member may be used | |
855 | * @filp: only f_mode and f_flags may be used | |
856 | * | |
857 | * Returns 0. | |
858 | * | |
859 | * Note: may block (uninterruptible) if error recovery is underway | |
860 | * on this disk. | |
861 | **/ | |
0338e291 | 862 | static int sd_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 863 | { |
1da177e4 LT |
864 | struct scsi_disk *sdkp = scsi_disk(disk); |
865 | struct scsi_device *sdev = sdkp->device; | |
866 | ||
56937f7b | 867 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_release\n")); |
1da177e4 | 868 | |
6e9624b8 | 869 | lock_kernel(); |
1da177e4 LT |
870 | if (!--sdkp->openers && sdev->removable) { |
871 | if (scsi_block_when_processing_errors(sdev)) | |
872 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW); | |
873 | } | |
874 | ||
875 | /* | |
876 | * XXX and what if there are packets in flight and this close() | |
877 | * XXX is followed by a "rmmod sd_mod"? | |
878 | */ | |
879 | scsi_disk_put(sdkp); | |
6e9624b8 | 880 | unlock_kernel(); |
1da177e4 LT |
881 | return 0; |
882 | } | |
883 | ||
a885c8c4 | 884 | static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
1da177e4 LT |
885 | { |
886 | struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk); | |
887 | struct scsi_device *sdp = sdkp->device; | |
888 | struct Scsi_Host *host = sdp->host; | |
889 | int diskinfo[4]; | |
890 | ||
891 | /* default to most commonly used values */ | |
892 | diskinfo[0] = 0x40; /* 1 << 6 */ | |
893 | diskinfo[1] = 0x20; /* 1 << 5 */ | |
894 | diskinfo[2] = sdkp->capacity >> 11; | |
895 | ||
896 | /* override with calculated, extended default, or driver values */ | |
897 | if (host->hostt->bios_param) | |
898 | host->hostt->bios_param(sdp, bdev, sdkp->capacity, diskinfo); | |
899 | else | |
900 | scsicam_bios_param(bdev, sdkp->capacity, diskinfo); | |
901 | ||
a885c8c4 CH |
902 | geo->heads = diskinfo[0]; |
903 | geo->sectors = diskinfo[1]; | |
904 | geo->cylinders = diskinfo[2]; | |
1da177e4 LT |
905 | return 0; |
906 | } | |
907 | ||
908 | /** | |
909 | * sd_ioctl - process an ioctl | |
910 | * @inode: only i_rdev/i_bdev members may be used | |
911 | * @filp: only f_mode and f_flags may be used | |
912 | * @cmd: ioctl command number | |
913 | * @arg: this is third argument given to ioctl(2) system call. | |
914 | * Often contains a pointer. | |
915 | * | |
916 | * Returns 0 if successful (some ioctls return postive numbers on | |
917 | * success as well). Returns a negated errno value in case of error. | |
918 | * | |
919 | * Note: most ioctls are forward onto the block subsystem or further | |
3a4fa0a2 | 920 | * down in the scsi subsystem. |
1da177e4 | 921 | **/ |
0338e291 | 922 | static int sd_ioctl(struct block_device *bdev, fmode_t mode, |
1da177e4 LT |
923 | unsigned int cmd, unsigned long arg) |
924 | { | |
1da177e4 LT |
925 | struct gendisk *disk = bdev->bd_disk; |
926 | struct scsi_device *sdp = scsi_disk(disk)->device; | |
927 | void __user *p = (void __user *)arg; | |
928 | int error; | |
929 | ||
930 | SCSI_LOG_IOCTL(1, printk("sd_ioctl: disk=%s, cmd=0x%x\n", | |
931 | disk->disk_name, cmd)); | |
932 | ||
8a6cfeb6 | 933 | lock_kernel(); |
1da177e4 LT |
934 | /* |
935 | * If we are in the middle of error recovery, don't let anyone | |
936 | * else try and use this device. Also, if error recovery fails, it | |
937 | * may try and take the device offline, in which case all further | |
938 | * access to the device is prohibited. | |
939 | */ | |
83ff6fe8 | 940 | error = scsi_nonblockable_ioctl(sdp, cmd, p, |
fd4ce1ac | 941 | (mode & FMODE_NDELAY) != 0); |
1da177e4 | 942 | if (!scsi_block_when_processing_errors(sdp) || !error) |
8a6cfeb6 | 943 | goto out; |
1da177e4 | 944 | |
1da177e4 LT |
945 | /* |
946 | * Send SCSI addressing ioctls directly to mid level, send other | |
947 | * ioctls to block level and then onto mid level if they can't be | |
948 | * resolved. | |
949 | */ | |
950 | switch (cmd) { | |
951 | case SCSI_IOCTL_GET_IDLUN: | |
952 | case SCSI_IOCTL_GET_BUS_NUMBER: | |
8a6cfeb6 AB |
953 | error = scsi_ioctl(sdp, cmd, p); |
954 | break; | |
1da177e4 | 955 | default: |
0338e291 | 956 | error = scsi_cmd_ioctl(disk->queue, disk, mode, cmd, p); |
1da177e4 | 957 | if (error != -ENOTTY) |
8a6cfeb6 AB |
958 | break; |
959 | error = scsi_ioctl(sdp, cmd, p); | |
960 | break; | |
1da177e4 | 961 | } |
8a6cfeb6 AB |
962 | out: |
963 | unlock_kernel(); | |
964 | return error; | |
1da177e4 LT |
965 | } |
966 | ||
967 | static void set_media_not_present(struct scsi_disk *sdkp) | |
968 | { | |
969 | sdkp->media_present = 0; | |
970 | sdkp->capacity = 0; | |
971 | sdkp->device->changed = 1; | |
972 | } | |
973 | ||
974 | /** | |
975 | * sd_media_changed - check if our medium changed | |
976 | * @disk: kernel device descriptor | |
977 | * | |
978 | * Returns 0 if not applicable or no change; 1 if change | |
979 | * | |
980 | * Note: this function is invoked from the block subsystem. | |
981 | **/ | |
982 | static int sd_media_changed(struct gendisk *disk) | |
983 | { | |
984 | struct scsi_disk *sdkp = scsi_disk(disk); | |
985 | struct scsi_device *sdp = sdkp->device; | |
001aac25 | 986 | struct scsi_sense_hdr *sshdr = NULL; |
1da177e4 LT |
987 | int retval; |
988 | ||
fa0d34be | 989 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_media_changed\n")); |
1da177e4 LT |
990 | |
991 | if (!sdp->removable) | |
992 | return 0; | |
993 | ||
994 | /* | |
995 | * If the device is offline, don't send any commands - just pretend as | |
996 | * if the command failed. If the device ever comes back online, we | |
997 | * can deal with it then. It is only because of unrecoverable errors | |
998 | * that we would ever take a device offline in the first place. | |
999 | */ | |
285e9670 KS |
1000 | if (!scsi_device_online(sdp)) { |
1001 | set_media_not_present(sdkp); | |
1002 | retval = 1; | |
1003 | goto out; | |
1004 | } | |
1da177e4 LT |
1005 | |
1006 | /* | |
1007 | * Using TEST_UNIT_READY enables differentiation between drive with | |
1008 | * no cartridge loaded - NOT READY, drive with changed cartridge - | |
1009 | * UNIT ATTENTION, or with same cartridge - GOOD STATUS. | |
1010 | * | |
1011 | * Drives that auto spin down. eg iomega jaz 1G, will be started | |
1012 | * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever | |
1013 | * sd_revalidate() is called. | |
1014 | */ | |
1015 | retval = -ENODEV; | |
285e9670 | 1016 | |
001aac25 JB |
1017 | if (scsi_block_when_processing_errors(sdp)) { |
1018 | sshdr = kzalloc(sizeof(*sshdr), GFP_KERNEL); | |
1019 | retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, SD_MAX_RETRIES, | |
1020 | sshdr); | |
1021 | } | |
1da177e4 LT |
1022 | |
1023 | /* | |
1024 | * Unable to test, unit probably not ready. This usually | |
1025 | * means there is no disc in the drive. Mark as changed, | |
1026 | * and we will figure it out later once the drive is | |
1027 | * available again. | |
1028 | */ | |
001aac25 JB |
1029 | if (retval || (scsi_sense_valid(sshdr) && |
1030 | /* 0x3a is medium not present */ | |
1031 | sshdr->asc == 0x3a)) { | |
285e9670 KS |
1032 | set_media_not_present(sdkp); |
1033 | retval = 1; | |
1034 | goto out; | |
1035 | } | |
1da177e4 LT |
1036 | |
1037 | /* | |
1038 | * For removable scsi disk we have to recognise the presence | |
1039 | * of a disk in the drive. This is kept in the struct scsi_disk | |
1040 | * struct and tested at open ! Daniel Roche (dan@lectra.fr) | |
1041 | */ | |
1042 | sdkp->media_present = 1; | |
1043 | ||
1044 | retval = sdp->changed; | |
1045 | sdp->changed = 0; | |
285e9670 KS |
1046 | out: |
1047 | if (retval != sdkp->previous_state) | |
1048 | sdev_evt_send_simple(sdp, SDEV_EVT_MEDIA_CHANGE, GFP_KERNEL); | |
1049 | sdkp->previous_state = retval; | |
001aac25 | 1050 | kfree(sshdr); |
1da177e4 | 1051 | return retval; |
1da177e4 LT |
1052 | } |
1053 | ||
e73aec82 | 1054 | static int sd_sync_cache(struct scsi_disk *sdkp) |
1da177e4 | 1055 | { |
1da177e4 | 1056 | int retries, res; |
e73aec82 | 1057 | struct scsi_device *sdp = sdkp->device; |
ea73a9f2 | 1058 | struct scsi_sense_hdr sshdr; |
1da177e4 LT |
1059 | |
1060 | if (!scsi_device_online(sdp)) | |
1061 | return -ENODEV; | |
1062 | ||
1da177e4 | 1063 | |
1da177e4 LT |
1064 | for (retries = 3; retries > 0; --retries) { |
1065 | unsigned char cmd[10] = { 0 }; | |
1066 | ||
1067 | cmd[0] = SYNCHRONIZE_CACHE; | |
1068 | /* | |
1069 | * Leave the rest of the command zero to indicate | |
1070 | * flush everything. | |
1071 | */ | |
ea73a9f2 | 1072 | res = scsi_execute_req(sdp, cmd, DMA_NONE, NULL, 0, &sshdr, |
f4f4e47e | 1073 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); |
ea73a9f2 | 1074 | if (res == 0) |
1da177e4 LT |
1075 | break; |
1076 | } | |
1077 | ||
e73aec82 MP |
1078 | if (res) { |
1079 | sd_print_result(sdkp, res); | |
1080 | if (driver_byte(res) & DRIVER_SENSE) | |
1081 | sd_print_sense_hdr(sdkp, &sshdr); | |
1da177e4 LT |
1082 | } |
1083 | ||
3721050a TH |
1084 | if (res) |
1085 | return -EIO; | |
1086 | return 0; | |
1da177e4 LT |
1087 | } |
1088 | ||
1da177e4 LT |
1089 | static void sd_rescan(struct device *dev) |
1090 | { | |
39b7f1e2 AS |
1091 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
1092 | ||
1093 | if (sdkp) { | |
f98a8cae | 1094 | revalidate_disk(sdkp->disk); |
39b7f1e2 AS |
1095 | scsi_disk_put(sdkp); |
1096 | } | |
1da177e4 LT |
1097 | } |
1098 | ||
1099 | ||
1100 | #ifdef CONFIG_COMPAT | |
1101 | /* | |
1102 | * This gets directly called from VFS. When the ioctl | |
1103 | * is not recognized we go back to the other translation paths. | |
1104 | */ | |
0338e291 AV |
1105 | static int sd_compat_ioctl(struct block_device *bdev, fmode_t mode, |
1106 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1107 | { |
0338e291 | 1108 | struct scsi_device *sdev = scsi_disk(bdev->bd_disk)->device; |
1da177e4 LT |
1109 | |
1110 | /* | |
1111 | * If we are in the middle of error recovery, don't let anyone | |
1112 | * else try and use this device. Also, if error recovery fails, it | |
1113 | * may try and take the device offline, in which case all further | |
1114 | * access to the device is prohibited. | |
1115 | */ | |
1116 | if (!scsi_block_when_processing_errors(sdev)) | |
1117 | return -ENODEV; | |
1118 | ||
1119 | if (sdev->host->hostt->compat_ioctl) { | |
1120 | int ret; | |
1121 | ||
1122 | ret = sdev->host->hostt->compat_ioctl(sdev, cmd, (void __user *)arg); | |
1123 | ||
1124 | return ret; | |
1125 | } | |
1126 | ||
1127 | /* | |
1128 | * Let the static ioctl translation table take care of it. | |
1129 | */ | |
1130 | return -ENOIOCTLCMD; | |
1131 | } | |
1132 | #endif | |
1133 | ||
83d5cde4 | 1134 | static const struct block_device_operations sd_fops = { |
1da177e4 | 1135 | .owner = THIS_MODULE, |
0338e291 AV |
1136 | .open = sd_open, |
1137 | .release = sd_release, | |
8a6cfeb6 | 1138 | .ioctl = sd_ioctl, |
a885c8c4 | 1139 | .getgeo = sd_getgeo, |
1da177e4 | 1140 | #ifdef CONFIG_COMPAT |
0338e291 | 1141 | .compat_ioctl = sd_compat_ioctl, |
1da177e4 LT |
1142 | #endif |
1143 | .media_changed = sd_media_changed, | |
1144 | .revalidate_disk = sd_revalidate_disk, | |
72ec24bd | 1145 | .unlock_native_capacity = sd_unlock_native_capacity, |
1da177e4 LT |
1146 | }; |
1147 | ||
af55ff67 MP |
1148 | static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd) |
1149 | { | |
83096ebf TH |
1150 | u64 start_lba = blk_rq_pos(scmd->request); |
1151 | u64 end_lba = blk_rq_pos(scmd->request) + (scsi_bufflen(scmd) / 512); | |
af55ff67 MP |
1152 | u64 bad_lba; |
1153 | int info_valid; | |
1154 | ||
33659ebb | 1155 | if (scmd->request->cmd_type != REQ_TYPE_FS) |
af55ff67 MP |
1156 | return 0; |
1157 | ||
1158 | info_valid = scsi_get_sense_info_fld(scmd->sense_buffer, | |
1159 | SCSI_SENSE_BUFFERSIZE, | |
1160 | &bad_lba); | |
1161 | if (!info_valid) | |
1162 | return 0; | |
1163 | ||
1164 | if (scsi_bufflen(scmd) <= scmd->device->sector_size) | |
1165 | return 0; | |
1166 | ||
1167 | if (scmd->device->sector_size < 512) { | |
1168 | /* only legitimate sector_size here is 256 */ | |
1169 | start_lba <<= 1; | |
1170 | end_lba <<= 1; | |
1171 | } else { | |
1172 | /* be careful ... don't want any overflows */ | |
1173 | u64 factor = scmd->device->sector_size / 512; | |
1174 | do_div(start_lba, factor); | |
1175 | do_div(end_lba, factor); | |
1176 | } | |
1177 | ||
1178 | /* The bad lba was reported incorrectly, we have no idea where | |
1179 | * the error is. | |
1180 | */ | |
1181 | if (bad_lba < start_lba || bad_lba >= end_lba) | |
1182 | return 0; | |
1183 | ||
1184 | /* This computation should always be done in terms of | |
1185 | * the resolution of the device's medium. | |
1186 | */ | |
1187 | return (bad_lba - start_lba) * scmd->device->sector_size; | |
1188 | } | |
1189 | ||
1da177e4 | 1190 | /** |
7b3d9545 | 1191 | * sd_done - bottom half handler: called when the lower level |
1da177e4 LT |
1192 | * driver has completed (successfully or otherwise) a scsi command. |
1193 | * @SCpnt: mid-level's per command structure. | |
1194 | * | |
1195 | * Note: potentially run from within an ISR. Must not block. | |
1196 | **/ | |
7b3d9545 | 1197 | static int sd_done(struct scsi_cmnd *SCpnt) |
1da177e4 LT |
1198 | { |
1199 | int result = SCpnt->result; | |
af55ff67 | 1200 | unsigned int good_bytes = result ? 0 : scsi_bufflen(SCpnt); |
1da177e4 | 1201 | struct scsi_sense_hdr sshdr; |
4e7392ec | 1202 | struct scsi_disk *sdkp = scsi_disk(SCpnt->request->rq_disk); |
1da177e4 LT |
1203 | int sense_valid = 0; |
1204 | int sense_deferred = 0; | |
1da177e4 LT |
1205 | |
1206 | if (result) { | |
1207 | sense_valid = scsi_command_normalize_sense(SCpnt, &sshdr); | |
1208 | if (sense_valid) | |
1209 | sense_deferred = scsi_sense_is_deferred(&sshdr); | |
1210 | } | |
1da177e4 | 1211 | #ifdef CONFIG_SCSI_LOGGING |
fa0d34be | 1212 | SCSI_LOG_HLCOMPLETE(1, scsi_print_result(SCpnt)); |
1da177e4 | 1213 | if (sense_valid) { |
fa0d34be | 1214 | SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO, SCpnt, |
7b3d9545 | 1215 | "sd_done: sb[respc,sk,asc," |
fa0d34be MP |
1216 | "ascq]=%x,%x,%x,%x\n", |
1217 | sshdr.response_code, | |
1218 | sshdr.sense_key, sshdr.asc, | |
1219 | sshdr.ascq)); | |
1da177e4 LT |
1220 | } |
1221 | #endif | |
03aba2f7 LT |
1222 | if (driver_byte(result) != DRIVER_SENSE && |
1223 | (!sense_valid || sense_deferred)) | |
1224 | goto out; | |
1225 | ||
1226 | switch (sshdr.sense_key) { | |
1227 | case HARDWARE_ERROR: | |
1228 | case MEDIUM_ERROR: | |
af55ff67 | 1229 | good_bytes = sd_completed_bytes(SCpnt); |
03aba2f7 LT |
1230 | break; |
1231 | case RECOVERED_ERROR: | |
af55ff67 MP |
1232 | good_bytes = scsi_bufflen(SCpnt); |
1233 | break; | |
10dab226 JW |
1234 | case NO_SENSE: |
1235 | /* This indicates a false check condition, so ignore it. An | |
1236 | * unknown amount of data was transferred so treat it as an | |
1237 | * error. | |
1238 | */ | |
1239 | scsi_print_sense("sd", SCpnt); | |
1240 | SCpnt->result = 0; | |
1241 | memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); | |
1242 | break; | |
fa4698fc MP |
1243 | case ABORTED_COMMAND: /* DIF: Target detected corruption */ |
1244 | case ILLEGAL_REQUEST: /* DIX: Host detected corruption */ | |
1245 | if (sshdr.asc == 0x10) | |
af55ff67 | 1246 | good_bytes = sd_completed_bytes(SCpnt); |
03aba2f7 LT |
1247 | break; |
1248 | default: | |
1249 | break; | |
1da177e4 | 1250 | } |
03aba2f7 | 1251 | out: |
af55ff67 MP |
1252 | if (rq_data_dir(SCpnt->request) == READ && scsi_prot_sg_count(SCpnt)) |
1253 | sd_dif_complete(SCpnt, good_bytes); | |
1254 | ||
4e7392ec | 1255 | if (scsi_host_dif_capable(sdkp->device->host, sdkp->protection_type) |
77c9cfc5 MP |
1256 | == SD_DIF_TYPE2_PROTECTION && SCpnt->cmnd != SCpnt->request->cmd) { |
1257 | ||
1258 | /* We have to print a failed command here as the | |
1259 | * extended CDB gets freed before scsi_io_completion() | |
1260 | * is called. | |
1261 | */ | |
1262 | if (result) | |
1263 | scsi_print_command(SCpnt); | |
1264 | ||
4e7392ec | 1265 | mempool_free(SCpnt->cmnd, sd_cdb_pool); |
77c9cfc5 MP |
1266 | SCpnt->cmnd = NULL; |
1267 | SCpnt->cmd_len = 0; | |
1268 | } | |
4e7392ec | 1269 | |
7b3d9545 | 1270 | return good_bytes; |
1da177e4 LT |
1271 | } |
1272 | ||
ea73a9f2 JB |
1273 | static int media_not_present(struct scsi_disk *sdkp, |
1274 | struct scsi_sense_hdr *sshdr) | |
1da177e4 | 1275 | { |
1da177e4 | 1276 | |
ea73a9f2 | 1277 | if (!scsi_sense_valid(sshdr)) |
1da177e4 LT |
1278 | return 0; |
1279 | /* not invoked for commands that could return deferred errors */ | |
ea73a9f2 JB |
1280 | if (sshdr->sense_key != NOT_READY && |
1281 | sshdr->sense_key != UNIT_ATTENTION) | |
1282 | return 0; | |
1283 | if (sshdr->asc != 0x3A) /* medium not present */ | |
1284 | return 0; | |
1285 | ||
1da177e4 LT |
1286 | set_media_not_present(sdkp); |
1287 | return 1; | |
1288 | } | |
1289 | ||
1290 | /* | |
1291 | * spinup disk - called only in sd_revalidate_disk() | |
1292 | */ | |
1293 | static void | |
e73aec82 | 1294 | sd_spinup_disk(struct scsi_disk *sdkp) |
ea73a9f2 | 1295 | { |
1da177e4 | 1296 | unsigned char cmd[10]; |
4451e472 | 1297 | unsigned long spintime_expire = 0; |
1da177e4 LT |
1298 | int retries, spintime; |
1299 | unsigned int the_result; | |
1300 | struct scsi_sense_hdr sshdr; | |
1301 | int sense_valid = 0; | |
1302 | ||
1303 | spintime = 0; | |
1304 | ||
1305 | /* Spin up drives, as required. Only do this at boot time */ | |
1306 | /* Spinup needs to be done for module loads too. */ | |
1307 | do { | |
1308 | retries = 0; | |
1309 | ||
1310 | do { | |
1311 | cmd[0] = TEST_UNIT_READY; | |
1312 | memset((void *) &cmd[1], 0, 9); | |
1313 | ||
ea73a9f2 JB |
1314 | the_result = scsi_execute_req(sdkp->device, cmd, |
1315 | DMA_NONE, NULL, 0, | |
1316 | &sshdr, SD_TIMEOUT, | |
f4f4e47e | 1317 | SD_MAX_RETRIES, NULL); |
1da177e4 | 1318 | |
b4d38e38 AS |
1319 | /* |
1320 | * If the drive has indicated to us that it | |
1321 | * doesn't have any media in it, don't bother | |
1322 | * with any more polling. | |
1323 | */ | |
1324 | if (media_not_present(sdkp, &sshdr)) | |
1325 | return; | |
1326 | ||
1da177e4 | 1327 | if (the_result) |
ea73a9f2 | 1328 | sense_valid = scsi_sense_valid(&sshdr); |
1da177e4 LT |
1329 | retries++; |
1330 | } while (retries < 3 && | |
1331 | (!scsi_status_is_good(the_result) || | |
1332 | ((driver_byte(the_result) & DRIVER_SENSE) && | |
1333 | sense_valid && sshdr.sense_key == UNIT_ATTENTION))); | |
1334 | ||
1da177e4 LT |
1335 | if ((driver_byte(the_result) & DRIVER_SENSE) == 0) { |
1336 | /* no sense, TUR either succeeded or failed | |
1337 | * with a status error */ | |
e73aec82 MP |
1338 | if(!spintime && !scsi_status_is_good(the_result)) { |
1339 | sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n"); | |
1340 | sd_print_result(sdkp, the_result); | |
1341 | } | |
1da177e4 LT |
1342 | break; |
1343 | } | |
1344 | ||
1345 | /* | |
1346 | * The device does not want the automatic start to be issued. | |
1347 | */ | |
33dd6f92 | 1348 | if (sdkp->device->no_start_on_add) |
1da177e4 | 1349 | break; |
1da177e4 | 1350 | |
33dd6f92 MW |
1351 | if (sense_valid && sshdr.sense_key == NOT_READY) { |
1352 | if (sshdr.asc == 4 && sshdr.ascq == 3) | |
1353 | break; /* manual intervention required */ | |
1354 | if (sshdr.asc == 4 && sshdr.ascq == 0xb) | |
1355 | break; /* standby */ | |
1356 | if (sshdr.asc == 4 && sshdr.ascq == 0xc) | |
1357 | break; /* unavailable */ | |
1358 | /* | |
1359 | * Issue command to spin up drive when not ready | |
1360 | */ | |
1da177e4 | 1361 | if (!spintime) { |
e73aec82 | 1362 | sd_printk(KERN_NOTICE, sdkp, "Spinning up disk..."); |
1da177e4 LT |
1363 | cmd[0] = START_STOP; |
1364 | cmd[1] = 1; /* Return immediately */ | |
1365 | memset((void *) &cmd[2], 0, 8); | |
1366 | cmd[4] = 1; /* Start spin cycle */ | |
d2886ea3 SR |
1367 | if (sdkp->device->start_stop_pwr_cond) |
1368 | cmd[4] |= 1 << 4; | |
ea73a9f2 JB |
1369 | scsi_execute_req(sdkp->device, cmd, DMA_NONE, |
1370 | NULL, 0, &sshdr, | |
f4f4e47e FT |
1371 | SD_TIMEOUT, SD_MAX_RETRIES, |
1372 | NULL); | |
4451e472 AS |
1373 | spintime_expire = jiffies + 100 * HZ; |
1374 | spintime = 1; | |
1da177e4 | 1375 | } |
1da177e4 LT |
1376 | /* Wait 1 second for next try */ |
1377 | msleep(1000); | |
1378 | printk("."); | |
4451e472 AS |
1379 | |
1380 | /* | |
1381 | * Wait for USB flash devices with slow firmware. | |
1382 | * Yes, this sense key/ASC combination shouldn't | |
1383 | * occur here. It's characteristic of these devices. | |
1384 | */ | |
1385 | } else if (sense_valid && | |
1386 | sshdr.sense_key == UNIT_ATTENTION && | |
1387 | sshdr.asc == 0x28) { | |
1388 | if (!spintime) { | |
1389 | spintime_expire = jiffies + 5 * HZ; | |
1390 | spintime = 1; | |
1391 | } | |
1392 | /* Wait 1 second for next try */ | |
1393 | msleep(1000); | |
1da177e4 LT |
1394 | } else { |
1395 | /* we don't understand the sense code, so it's | |
1396 | * probably pointless to loop */ | |
1397 | if(!spintime) { | |
e73aec82 MP |
1398 | sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n"); |
1399 | sd_print_sense_hdr(sdkp, &sshdr); | |
1da177e4 LT |
1400 | } |
1401 | break; | |
1402 | } | |
1403 | ||
4451e472 | 1404 | } while (spintime && time_before_eq(jiffies, spintime_expire)); |
1da177e4 LT |
1405 | |
1406 | if (spintime) { | |
1407 | if (scsi_status_is_good(the_result)) | |
1408 | printk("ready\n"); | |
1409 | else | |
1410 | printk("not responding...\n"); | |
1411 | } | |
1412 | } | |
1413 | ||
e0597d70 MP |
1414 | |
1415 | /* | |
1416 | * Determine whether disk supports Data Integrity Field. | |
1417 | */ | |
1418 | void sd_read_protection_type(struct scsi_disk *sdkp, unsigned char *buffer) | |
1419 | { | |
1420 | struct scsi_device *sdp = sdkp->device; | |
1421 | u8 type; | |
1422 | ||
1423 | if (scsi_device_protection(sdp) == 0 || (buffer[12] & 1) == 0) | |
35e1a5d9 MP |
1424 | return; |
1425 | ||
1426 | type = ((buffer[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */ | |
1427 | ||
1428 | if (type == sdkp->protection_type || !sdkp->first_scan) | |
1429 | return; | |
e0597d70 | 1430 | |
be922f47 MP |
1431 | sdkp->protection_type = type; |
1432 | ||
4e7392ec | 1433 | if (type > SD_DIF_TYPE3_PROTECTION) { |
35e1a5d9 MP |
1434 | sd_printk(KERN_ERR, sdkp, "formatted with unsupported " \ |
1435 | "protection type %u. Disabling disk!\n", type); | |
1436 | sdkp->capacity = 0; | |
1437 | return; | |
e0597d70 MP |
1438 | } |
1439 | ||
35e1a5d9 MP |
1440 | if (scsi_host_dif_capable(sdp->host, type)) |
1441 | sd_printk(KERN_NOTICE, sdkp, | |
1442 | "Enabling DIF Type %u protection\n", type); | |
1443 | else | |
1444 | sd_printk(KERN_NOTICE, sdkp, | |
1445 | "Disabling DIF Type %u protection\n", type); | |
e0597d70 MP |
1446 | } |
1447 | ||
0da205e0 MW |
1448 | static void read_capacity_error(struct scsi_disk *sdkp, struct scsi_device *sdp, |
1449 | struct scsi_sense_hdr *sshdr, int sense_valid, | |
1450 | int the_result) | |
1451 | { | |
1452 | sd_print_result(sdkp, the_result); | |
1453 | if (driver_byte(the_result) & DRIVER_SENSE) | |
1454 | sd_print_sense_hdr(sdkp, sshdr); | |
1455 | else | |
1456 | sd_printk(KERN_NOTICE, sdkp, "Sense not available.\n"); | |
1457 | ||
1458 | /* | |
1459 | * Set dirty bit for removable devices if not ready - | |
1460 | * sometimes drives will not report this properly. | |
1461 | */ | |
1462 | if (sdp->removable && | |
1463 | sense_valid && sshdr->sense_key == NOT_READY) | |
1464 | sdp->changed = 1; | |
1465 | ||
1466 | /* | |
1467 | * We used to set media_present to 0 here to indicate no media | |
1468 | * in the drive, but some drives fail read capacity even with | |
1469 | * media present, so we can't do that. | |
1470 | */ | |
1471 | sdkp->capacity = 0; /* unknown mapped to zero - as usual */ | |
1472 | } | |
1473 | ||
1474 | #define RC16_LEN 32 | |
1475 | #if RC16_LEN > SD_BUF_SIZE | |
1476 | #error RC16_LEN must not be more than SD_BUF_SIZE | |
1477 | #endif | |
1478 | ||
3233ac19 JB |
1479 | #define READ_CAPACITY_RETRIES_ON_RESET 10 |
1480 | ||
0da205e0 MW |
1481 | static int read_capacity_16(struct scsi_disk *sdkp, struct scsi_device *sdp, |
1482 | unsigned char *buffer) | |
ea73a9f2 | 1483 | { |
1da177e4 | 1484 | unsigned char cmd[16]; |
1da177e4 LT |
1485 | struct scsi_sense_hdr sshdr; |
1486 | int sense_valid = 0; | |
0da205e0 | 1487 | int the_result; |
3233ac19 | 1488 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
ea09bcc9 | 1489 | unsigned int alignment; |
0da205e0 MW |
1490 | unsigned long long lba; |
1491 | unsigned sector_size; | |
1da177e4 | 1492 | |
1da177e4 | 1493 | do { |
0da205e0 MW |
1494 | memset(cmd, 0, 16); |
1495 | cmd[0] = SERVICE_ACTION_IN; | |
1496 | cmd[1] = SAI_READ_CAPACITY_16; | |
1497 | cmd[13] = RC16_LEN; | |
1498 | memset(buffer, 0, RC16_LEN); | |
1499 | ||
ea73a9f2 | 1500 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, |
0da205e0 MW |
1501 | buffer, RC16_LEN, &sshdr, |
1502 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
1da177e4 | 1503 | |
ea73a9f2 | 1504 | if (media_not_present(sdkp, &sshdr)) |
0da205e0 | 1505 | return -ENODEV; |
1da177e4 | 1506 | |
2b301307 | 1507 | if (the_result) { |
ea73a9f2 | 1508 | sense_valid = scsi_sense_valid(&sshdr); |
2b301307 MW |
1509 | if (sense_valid && |
1510 | sshdr.sense_key == ILLEGAL_REQUEST && | |
1511 | (sshdr.asc == 0x20 || sshdr.asc == 0x24) && | |
1512 | sshdr.ascq == 0x00) | |
1513 | /* Invalid Command Operation Code or | |
1514 | * Invalid Field in CDB, just retry | |
1515 | * silently with RC10 */ | |
1516 | return -EINVAL; | |
3233ac19 JB |
1517 | if (sense_valid && |
1518 | sshdr.sense_key == UNIT_ATTENTION && | |
1519 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) | |
1520 | /* Device reset might occur several times, | |
1521 | * give it one more chance */ | |
1522 | if (--reset_retries > 0) | |
1523 | continue; | |
2b301307 | 1524 | } |
1da177e4 LT |
1525 | retries--; |
1526 | ||
1527 | } while (the_result && retries); | |
1528 | ||
0da205e0 | 1529 | if (the_result) { |
e73aec82 | 1530 | sd_printk(KERN_NOTICE, sdkp, "READ CAPACITY(16) failed\n"); |
0da205e0 MW |
1531 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); |
1532 | return -EINVAL; | |
1533 | } | |
e73aec82 | 1534 | |
8f76d151 DH |
1535 | sector_size = get_unaligned_be32(&buffer[8]); |
1536 | lba = get_unaligned_be64(&buffer[0]); | |
0da205e0 MW |
1537 | |
1538 | sd_read_protection_type(sdkp, buffer); | |
1539 | ||
1540 | if ((sizeof(sdkp->capacity) == 4) && (lba >= 0xffffffffULL)) { | |
1541 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a " | |
1542 | "kernel compiled with support for large block " | |
1543 | "devices.\n"); | |
1544 | sdkp->capacity = 0; | |
1545 | return -EOVERFLOW; | |
1546 | } | |
1547 | ||
ea09bcc9 MP |
1548 | /* Logical blocks per physical block exponent */ |
1549 | sdkp->hw_sector_size = (1 << (buffer[13] & 0xf)) * sector_size; | |
1550 | ||
1551 | /* Lowest aligned logical block */ | |
1552 | alignment = ((buffer[14] & 0x3f) << 8 | buffer[15]) * sector_size; | |
1553 | blk_queue_alignment_offset(sdp->request_queue, alignment); | |
1554 | if (alignment && sdkp->first_scan) | |
1555 | sd_printk(KERN_NOTICE, sdkp, | |
1556 | "physical block alignment offset: %u\n", alignment); | |
1557 | ||
e339c1a7 MP |
1558 | if (buffer[14] & 0x80) { /* TPE */ |
1559 | struct request_queue *q = sdp->request_queue; | |
1560 | ||
1561 | sdkp->thin_provisioning = 1; | |
1562 | q->limits.discard_granularity = sdkp->hw_sector_size; | |
1563 | q->limits.max_discard_sectors = 0xffffffff; | |
1564 | ||
1565 | if (buffer[14] & 0x40) /* TPRZ */ | |
1566 | q->limits.discard_zeroes_data = 1; | |
1567 | ||
1568 | queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, q); | |
1569 | } | |
1570 | ||
0da205e0 MW |
1571 | sdkp->capacity = lba + 1; |
1572 | return sector_size; | |
1573 | } | |
1574 | ||
1575 | static int read_capacity_10(struct scsi_disk *sdkp, struct scsi_device *sdp, | |
1576 | unsigned char *buffer) | |
1577 | { | |
1578 | unsigned char cmd[16]; | |
1579 | struct scsi_sense_hdr sshdr; | |
1580 | int sense_valid = 0; | |
1581 | int the_result; | |
3233ac19 | 1582 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
0da205e0 MW |
1583 | sector_t lba; |
1584 | unsigned sector_size; | |
1585 | ||
1586 | do { | |
1587 | cmd[0] = READ_CAPACITY; | |
1588 | memset(&cmd[1], 0, 9); | |
1589 | memset(buffer, 0, 8); | |
1590 | ||
1591 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, | |
1592 | buffer, 8, &sshdr, | |
1593 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
1594 | ||
1595 | if (media_not_present(sdkp, &sshdr)) | |
1596 | return -ENODEV; | |
1597 | ||
3233ac19 | 1598 | if (the_result) { |
0da205e0 | 1599 | sense_valid = scsi_sense_valid(&sshdr); |
3233ac19 JB |
1600 | if (sense_valid && |
1601 | sshdr.sense_key == UNIT_ATTENTION && | |
1602 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) | |
1603 | /* Device reset might occur several times, | |
1604 | * give it one more chance */ | |
1605 | if (--reset_retries > 0) | |
1606 | continue; | |
1607 | } | |
0da205e0 MW |
1608 | retries--; |
1609 | ||
1610 | } while (the_result && retries); | |
1611 | ||
1612 | if (the_result) { | |
1613 | sd_printk(KERN_NOTICE, sdkp, "READ CAPACITY failed\n"); | |
1614 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); | |
1615 | return -EINVAL; | |
1616 | } | |
1617 | ||
8f76d151 DH |
1618 | sector_size = get_unaligned_be32(&buffer[4]); |
1619 | lba = get_unaligned_be32(&buffer[0]); | |
0da205e0 MW |
1620 | |
1621 | if ((sizeof(sdkp->capacity) == 4) && (lba == 0xffffffff)) { | |
1622 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a " | |
1623 | "kernel compiled with support for large block " | |
1624 | "devices.\n"); | |
1625 | sdkp->capacity = 0; | |
1626 | return -EOVERFLOW; | |
1627 | } | |
1628 | ||
1629 | sdkp->capacity = lba + 1; | |
ea09bcc9 | 1630 | sdkp->hw_sector_size = sector_size; |
0da205e0 MW |
1631 | return sector_size; |
1632 | } | |
1633 | ||
2b301307 MW |
1634 | static int sd_try_rc16_first(struct scsi_device *sdp) |
1635 | { | |
f87146bb HR |
1636 | if (sdp->host->max_cmd_len < 16) |
1637 | return 0; | |
2b301307 MW |
1638 | if (sdp->scsi_level > SCSI_SPC_2) |
1639 | return 1; | |
1640 | if (scsi_device_protection(sdp)) | |
1641 | return 1; | |
1642 | return 0; | |
1643 | } | |
1644 | ||
0da205e0 MW |
1645 | /* |
1646 | * read disk capacity | |
1647 | */ | |
1648 | static void | |
1649 | sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer) | |
1650 | { | |
1651 | int sector_size; | |
1652 | struct scsi_device *sdp = sdkp->device; | |
70a9b873 | 1653 | sector_t old_capacity = sdkp->capacity; |
0da205e0 | 1654 | |
2b301307 | 1655 | if (sd_try_rc16_first(sdp)) { |
0da205e0 MW |
1656 | sector_size = read_capacity_16(sdkp, sdp, buffer); |
1657 | if (sector_size == -EOVERFLOW) | |
1da177e4 | 1658 | goto got_data; |
2b301307 MW |
1659 | if (sector_size == -ENODEV) |
1660 | return; | |
1661 | if (sector_size < 0) | |
1662 | sector_size = read_capacity_10(sdkp, sdp, buffer); | |
0da205e0 MW |
1663 | if (sector_size < 0) |
1664 | return; | |
1da177e4 | 1665 | } else { |
0da205e0 MW |
1666 | sector_size = read_capacity_10(sdkp, sdp, buffer); |
1667 | if (sector_size == -EOVERFLOW) | |
1668 | goto got_data; | |
1669 | if (sector_size < 0) | |
1670 | return; | |
1671 | if ((sizeof(sdkp->capacity) > 4) && | |
1672 | (sdkp->capacity > 0xffffffffULL)) { | |
1673 | int old_sector_size = sector_size; | |
1674 | sd_printk(KERN_NOTICE, sdkp, "Very big device. " | |
1675 | "Trying to use READ CAPACITY(16).\n"); | |
1676 | sector_size = read_capacity_16(sdkp, sdp, buffer); | |
1677 | if (sector_size < 0) { | |
1678 | sd_printk(KERN_NOTICE, sdkp, | |
1679 | "Using 0xffffffff as device size\n"); | |
1680 | sdkp->capacity = 1 + (sector_t) 0xffffffff; | |
1681 | sector_size = old_sector_size; | |
1682 | goto got_data; | |
1683 | } | |
1684 | } | |
1685 | } | |
1da177e4 | 1686 | |
5c211caa AS |
1687 | /* Some devices are known to return the total number of blocks, |
1688 | * not the highest block number. Some devices have versions | |
1689 | * which do this and others which do not. Some devices we might | |
1690 | * suspect of doing this but we don't know for certain. | |
1691 | * | |
1692 | * If we know the reported capacity is wrong, decrement it. If | |
1693 | * we can only guess, then assume the number of blocks is even | |
1694 | * (usually true but not always) and err on the side of lowering | |
1695 | * the capacity. | |
1696 | */ | |
1697 | if (sdp->fix_capacity || | |
1698 | (sdp->guess_capacity && (sdkp->capacity & 0x01))) { | |
1699 | sd_printk(KERN_INFO, sdkp, "Adjusting the sector count " | |
1700 | "from its reported value: %llu\n", | |
1701 | (unsigned long long) sdkp->capacity); | |
1da177e4 | 1702 | --sdkp->capacity; |
61bf54b7 ON |
1703 | } |
1704 | ||
1da177e4 LT |
1705 | got_data: |
1706 | if (sector_size == 0) { | |
1707 | sector_size = 512; | |
e73aec82 MP |
1708 | sd_printk(KERN_NOTICE, sdkp, "Sector size 0 reported, " |
1709 | "assuming 512.\n"); | |
1da177e4 LT |
1710 | } |
1711 | ||
1712 | if (sector_size != 512 && | |
1713 | sector_size != 1024 && | |
1714 | sector_size != 2048 && | |
1715 | sector_size != 4096 && | |
1716 | sector_size != 256) { | |
e73aec82 MP |
1717 | sd_printk(KERN_NOTICE, sdkp, "Unsupported sector size %d.\n", |
1718 | sector_size); | |
1da177e4 LT |
1719 | /* |
1720 | * The user might want to re-format the drive with | |
1721 | * a supported sectorsize. Once this happens, it | |
1722 | * would be relatively trivial to set the thing up. | |
1723 | * For this reason, we leave the thing in the table. | |
1724 | */ | |
1725 | sdkp->capacity = 0; | |
1726 | /* | |
1727 | * set a bogus sector size so the normal read/write | |
1728 | * logic in the block layer will eventually refuse any | |
1729 | * request on this device without tripping over power | |
1730 | * of two sector size assumptions | |
1731 | */ | |
1732 | sector_size = 512; | |
1733 | } | |
e1defc4f | 1734 | blk_queue_logical_block_size(sdp->request_queue, sector_size); |
7404ad3b | 1735 | |
1da177e4 | 1736 | { |
7404ad3b | 1737 | char cap_str_2[10], cap_str_10[10]; |
520a2c27 | 1738 | u64 sz = (u64)sdkp->capacity << ilog2(sector_size); |
1da177e4 | 1739 | |
7404ad3b JB |
1740 | string_get_size(sz, STRING_UNITS_2, cap_str_2, |
1741 | sizeof(cap_str_2)); | |
1742 | string_get_size(sz, STRING_UNITS_10, cap_str_10, | |
1743 | sizeof(cap_str_10)); | |
1da177e4 | 1744 | |
ea09bcc9 | 1745 | if (sdkp->first_scan || old_capacity != sdkp->capacity) { |
70a9b873 | 1746 | sd_printk(KERN_NOTICE, sdkp, |
ea09bcc9 | 1747 | "%llu %d-byte logical blocks: (%s/%s)\n", |
70a9b873 MP |
1748 | (unsigned long long)sdkp->capacity, |
1749 | sector_size, cap_str_10, cap_str_2); | |
ea09bcc9 MP |
1750 | |
1751 | if (sdkp->hw_sector_size != sector_size) | |
1752 | sd_printk(KERN_NOTICE, sdkp, | |
1753 | "%u-byte physical blocks\n", | |
1754 | sdkp->hw_sector_size); | |
1755 | } | |
1da177e4 LT |
1756 | } |
1757 | ||
1758 | /* Rescale capacity to 512-byte units */ | |
1759 | if (sector_size == 4096) | |
1760 | sdkp->capacity <<= 3; | |
1761 | else if (sector_size == 2048) | |
1762 | sdkp->capacity <<= 2; | |
1763 | else if (sector_size == 1024) | |
1764 | sdkp->capacity <<= 1; | |
1765 | else if (sector_size == 256) | |
1766 | sdkp->capacity >>= 1; | |
1767 | ||
ea09bcc9 | 1768 | blk_queue_physical_block_size(sdp->request_queue, sdkp->hw_sector_size); |
1da177e4 LT |
1769 | sdkp->device->sector_size = sector_size; |
1770 | } | |
1771 | ||
1772 | /* called with buffer of length 512 */ | |
1773 | static inline int | |
ea73a9f2 JB |
1774 | sd_do_mode_sense(struct scsi_device *sdp, int dbd, int modepage, |
1775 | unsigned char *buffer, int len, struct scsi_mode_data *data, | |
1776 | struct scsi_sense_hdr *sshdr) | |
1da177e4 | 1777 | { |
ea73a9f2 | 1778 | return scsi_mode_sense(sdp, dbd, modepage, buffer, len, |
1cf72699 | 1779 | SD_TIMEOUT, SD_MAX_RETRIES, data, |
ea73a9f2 | 1780 | sshdr); |
1da177e4 LT |
1781 | } |
1782 | ||
1783 | /* | |
1784 | * read write protect setting, if possible - called only in sd_revalidate_disk() | |
48970800 | 1785 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
1786 | */ |
1787 | static void | |
e73aec82 | 1788 | sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer) |
ea73a9f2 | 1789 | { |
1da177e4 | 1790 | int res; |
ea73a9f2 | 1791 | struct scsi_device *sdp = sdkp->device; |
1da177e4 | 1792 | struct scsi_mode_data data; |
70a9b873 | 1793 | int old_wp = sdkp->write_prot; |
1da177e4 LT |
1794 | |
1795 | set_disk_ro(sdkp->disk, 0); | |
ea73a9f2 | 1796 | if (sdp->skip_ms_page_3f) { |
e73aec82 | 1797 | sd_printk(KERN_NOTICE, sdkp, "Assuming Write Enabled\n"); |
1da177e4 LT |
1798 | return; |
1799 | } | |
1800 | ||
ea73a9f2 JB |
1801 | if (sdp->use_192_bytes_for_3f) { |
1802 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 192, &data, NULL); | |
1da177e4 LT |
1803 | } else { |
1804 | /* | |
1805 | * First attempt: ask for all pages (0x3F), but only 4 bytes. | |
1806 | * We have to start carefully: some devices hang if we ask | |
1807 | * for more than is available. | |
1808 | */ | |
ea73a9f2 | 1809 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 4, &data, NULL); |
1da177e4 LT |
1810 | |
1811 | /* | |
1812 | * Second attempt: ask for page 0 When only page 0 is | |
1813 | * implemented, a request for page 3F may return Sense Key | |
1814 | * 5: Illegal Request, Sense Code 24: Invalid field in | |
1815 | * CDB. | |
1816 | */ | |
1817 | if (!scsi_status_is_good(res)) | |
ea73a9f2 | 1818 | res = sd_do_mode_sense(sdp, 0, 0, buffer, 4, &data, NULL); |
1da177e4 LT |
1819 | |
1820 | /* | |
1821 | * Third attempt: ask 255 bytes, as we did earlier. | |
1822 | */ | |
1823 | if (!scsi_status_is_good(res)) | |
ea73a9f2 JB |
1824 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 255, |
1825 | &data, NULL); | |
1da177e4 LT |
1826 | } |
1827 | ||
1828 | if (!scsi_status_is_good(res)) { | |
e73aec82 MP |
1829 | sd_printk(KERN_WARNING, sdkp, |
1830 | "Test WP failed, assume Write Enabled\n"); | |
1da177e4 LT |
1831 | } else { |
1832 | sdkp->write_prot = ((data.device_specific & 0x80) != 0); | |
1833 | set_disk_ro(sdkp->disk, sdkp->write_prot); | |
70a9b873 MP |
1834 | if (sdkp->first_scan || old_wp != sdkp->write_prot) { |
1835 | sd_printk(KERN_NOTICE, sdkp, "Write Protect is %s\n", | |
1836 | sdkp->write_prot ? "on" : "off"); | |
1837 | sd_printk(KERN_DEBUG, sdkp, | |
1838 | "Mode Sense: %02x %02x %02x %02x\n", | |
1839 | buffer[0], buffer[1], buffer[2], buffer[3]); | |
1840 | } | |
1da177e4 LT |
1841 | } |
1842 | } | |
1843 | ||
1844 | /* | |
1845 | * sd_read_cache_type - called only from sd_revalidate_disk() | |
48970800 | 1846 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
1847 | */ |
1848 | static void | |
e73aec82 | 1849 | sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer) |
631e8a13 | 1850 | { |
1da177e4 | 1851 | int len = 0, res; |
ea73a9f2 | 1852 | struct scsi_device *sdp = sdkp->device; |
1da177e4 | 1853 | |
631e8a13 AV |
1854 | int dbd; |
1855 | int modepage; | |
1da177e4 LT |
1856 | struct scsi_mode_data data; |
1857 | struct scsi_sense_hdr sshdr; | |
70a9b873 MP |
1858 | int old_wce = sdkp->WCE; |
1859 | int old_rcd = sdkp->RCD; | |
1860 | int old_dpofua = sdkp->DPOFUA; | |
1da177e4 | 1861 | |
ea73a9f2 | 1862 | if (sdp->skip_ms_page_8) |
1da177e4 LT |
1863 | goto defaults; |
1864 | ||
ea73a9f2 | 1865 | if (sdp->type == TYPE_RBC) { |
631e8a13 AV |
1866 | modepage = 6; |
1867 | dbd = 8; | |
1868 | } else { | |
1869 | modepage = 8; | |
1870 | dbd = 0; | |
1871 | } | |
1872 | ||
1da177e4 | 1873 | /* cautiously ask */ |
ea73a9f2 | 1874 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, 4, &data, &sshdr); |
1da177e4 LT |
1875 | |
1876 | if (!scsi_status_is_good(res)) | |
1877 | goto bad_sense; | |
1878 | ||
6d73c851 AV |
1879 | if (!data.header_length) { |
1880 | modepage = 6; | |
e73aec82 | 1881 | sd_printk(KERN_ERR, sdkp, "Missing header in MODE_SENSE response\n"); |
6d73c851 AV |
1882 | } |
1883 | ||
1da177e4 LT |
1884 | /* that went OK, now ask for the proper length */ |
1885 | len = data.length; | |
1886 | ||
1887 | /* | |
1888 | * We're only interested in the first three bytes, actually. | |
1889 | * But the data cache page is defined for the first 20. | |
1890 | */ | |
1891 | if (len < 3) | |
1892 | goto bad_sense; | |
1893 | if (len > 20) | |
1894 | len = 20; | |
1895 | ||
1896 | /* Take headers and block descriptors into account */ | |
1897 | len += data.header_length + data.block_descriptor_length; | |
48970800 AV |
1898 | if (len > SD_BUF_SIZE) |
1899 | goto bad_sense; | |
1da177e4 LT |
1900 | |
1901 | /* Get the data */ | |
ea73a9f2 | 1902 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, len, &data, &sshdr); |
1da177e4 LT |
1903 | |
1904 | if (scsi_status_is_good(res)) { | |
631e8a13 | 1905 | int offset = data.header_length + data.block_descriptor_length; |
1da177e4 | 1906 | |
48970800 | 1907 | if (offset >= SD_BUF_SIZE - 2) { |
e73aec82 | 1908 | sd_printk(KERN_ERR, sdkp, "Malformed MODE SENSE response\n"); |
48970800 AV |
1909 | goto defaults; |
1910 | } | |
1911 | ||
631e8a13 | 1912 | if ((buffer[offset] & 0x3f) != modepage) { |
e73aec82 | 1913 | sd_printk(KERN_ERR, sdkp, "Got wrong page\n"); |
631e8a13 AV |
1914 | goto defaults; |
1915 | } | |
1916 | ||
1917 | if (modepage == 8) { | |
1918 | sdkp->WCE = ((buffer[offset + 2] & 0x04) != 0); | |
1919 | sdkp->RCD = ((buffer[offset + 2] & 0x01) != 0); | |
1920 | } else { | |
1921 | sdkp->WCE = ((buffer[offset + 2] & 0x01) == 0); | |
1922 | sdkp->RCD = 0; | |
1923 | } | |
1da177e4 | 1924 | |
007365ad TH |
1925 | sdkp->DPOFUA = (data.device_specific & 0x10) != 0; |
1926 | if (sdkp->DPOFUA && !sdkp->device->use_10_for_rw) { | |
e73aec82 MP |
1927 | sd_printk(KERN_NOTICE, sdkp, |
1928 | "Uses READ/WRITE(6), disabling FUA\n"); | |
007365ad TH |
1929 | sdkp->DPOFUA = 0; |
1930 | } | |
1931 | ||
70a9b873 MP |
1932 | if (sdkp->first_scan || old_wce != sdkp->WCE || |
1933 | old_rcd != sdkp->RCD || old_dpofua != sdkp->DPOFUA) | |
1934 | sd_printk(KERN_NOTICE, sdkp, | |
1935 | "Write cache: %s, read cache: %s, %s\n", | |
1936 | sdkp->WCE ? "enabled" : "disabled", | |
1937 | sdkp->RCD ? "disabled" : "enabled", | |
1938 | sdkp->DPOFUA ? "supports DPO and FUA" | |
1939 | : "doesn't support DPO or FUA"); | |
1da177e4 LT |
1940 | |
1941 | return; | |
1942 | } | |
1943 | ||
1944 | bad_sense: | |
ea73a9f2 | 1945 | if (scsi_sense_valid(&sshdr) && |
1da177e4 LT |
1946 | sshdr.sense_key == ILLEGAL_REQUEST && |
1947 | sshdr.asc == 0x24 && sshdr.ascq == 0x0) | |
e73aec82 MP |
1948 | /* Invalid field in CDB */ |
1949 | sd_printk(KERN_NOTICE, sdkp, "Cache data unavailable\n"); | |
1da177e4 | 1950 | else |
e73aec82 | 1951 | sd_printk(KERN_ERR, sdkp, "Asking for cache data failed\n"); |
1da177e4 LT |
1952 | |
1953 | defaults: | |
e73aec82 | 1954 | sd_printk(KERN_ERR, sdkp, "Assuming drive cache: write through\n"); |
1da177e4 LT |
1955 | sdkp->WCE = 0; |
1956 | sdkp->RCD = 0; | |
48970800 | 1957 | sdkp->DPOFUA = 0; |
1da177e4 LT |
1958 | } |
1959 | ||
e0597d70 MP |
1960 | /* |
1961 | * The ATO bit indicates whether the DIF application tag is available | |
1962 | * for use by the operating system. | |
1963 | */ | |
1964 | void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer) | |
1965 | { | |
1966 | int res, offset; | |
1967 | struct scsi_device *sdp = sdkp->device; | |
1968 | struct scsi_mode_data data; | |
1969 | struct scsi_sense_hdr sshdr; | |
1970 | ||
1971 | if (sdp->type != TYPE_DISK) | |
1972 | return; | |
1973 | ||
1974 | if (sdkp->protection_type == 0) | |
1975 | return; | |
1976 | ||
1977 | res = scsi_mode_sense(sdp, 1, 0x0a, buffer, 36, SD_TIMEOUT, | |
1978 | SD_MAX_RETRIES, &data, &sshdr); | |
1979 | ||
1980 | if (!scsi_status_is_good(res) || !data.header_length || | |
1981 | data.length < 6) { | |
1982 | sd_printk(KERN_WARNING, sdkp, | |
1983 | "getting Control mode page failed, assume no ATO\n"); | |
1984 | ||
1985 | if (scsi_sense_valid(&sshdr)) | |
1986 | sd_print_sense_hdr(sdkp, &sshdr); | |
1987 | ||
1988 | return; | |
1989 | } | |
1990 | ||
1991 | offset = data.header_length + data.block_descriptor_length; | |
1992 | ||
1993 | if ((buffer[offset] & 0x3f) != 0x0a) { | |
1994 | sd_printk(KERN_ERR, sdkp, "ATO Got wrong page\n"); | |
1995 | return; | |
1996 | } | |
1997 | ||
1998 | if ((buffer[offset + 5] & 0x80) == 0) | |
1999 | return; | |
2000 | ||
2001 | sdkp->ATO = 1; | |
2002 | ||
2003 | return; | |
2004 | } | |
2005 | ||
d11b6916 MP |
2006 | /** |
2007 | * sd_read_block_limits - Query disk device for preferred I/O sizes. | |
2008 | * @disk: disk to query | |
2009 | */ | |
2010 | static void sd_read_block_limits(struct scsi_disk *sdkp) | |
2011 | { | |
e339c1a7 | 2012 | struct request_queue *q = sdkp->disk->queue; |
d11b6916 | 2013 | unsigned int sector_sz = sdkp->device->sector_size; |
bb2d3de1 | 2014 | const int vpd_len = 64; |
e3deec09 | 2015 | unsigned char *buffer = kmalloc(vpd_len, GFP_KERNEL); |
d11b6916 | 2016 | |
e3deec09 JB |
2017 | if (!buffer || |
2018 | /* Block Limits VPD */ | |
2019 | scsi_get_vpd_page(sdkp->device, 0xb0, buffer, vpd_len)) | |
2020 | goto out; | |
d11b6916 MP |
2021 | |
2022 | blk_queue_io_min(sdkp->disk->queue, | |
2023 | get_unaligned_be16(&buffer[6]) * sector_sz); | |
2024 | blk_queue_io_opt(sdkp->disk->queue, | |
2025 | get_unaligned_be32(&buffer[12]) * sector_sz); | |
2026 | ||
e339c1a7 MP |
2027 | /* Thin provisioning enabled and page length indicates TP support */ |
2028 | if (sdkp->thin_provisioning && buffer[3] == 0x3c) { | |
2029 | unsigned int lba_count, desc_count, granularity; | |
2030 | ||
2031 | lba_count = get_unaligned_be32(&buffer[20]); | |
2032 | desc_count = get_unaligned_be32(&buffer[24]); | |
2033 | ||
2034 | if (lba_count) { | |
2035 | q->limits.max_discard_sectors = | |
2036 | lba_count * sector_sz >> 9; | |
2037 | ||
2038 | if (desc_count) | |
2039 | sdkp->unmap = 1; | |
2040 | } | |
2041 | ||
2042 | granularity = get_unaligned_be32(&buffer[28]); | |
2043 | ||
2044 | if (granularity) | |
2045 | q->limits.discard_granularity = granularity * sector_sz; | |
2046 | ||
2047 | if (buffer[32] & 0x80) | |
2048 | q->limits.discard_alignment = | |
2049 | get_unaligned_be32(&buffer[32]) & ~(1 << 31); | |
2050 | } | |
2051 | ||
e3deec09 | 2052 | out: |
d11b6916 MP |
2053 | kfree(buffer); |
2054 | } | |
2055 | ||
3821d768 MP |
2056 | /** |
2057 | * sd_read_block_characteristics - Query block dev. characteristics | |
2058 | * @disk: disk to query | |
2059 | */ | |
2060 | static void sd_read_block_characteristics(struct scsi_disk *sdkp) | |
2061 | { | |
e3deec09 | 2062 | unsigned char *buffer; |
3821d768 | 2063 | u16 rot; |
bb2d3de1 | 2064 | const int vpd_len = 64; |
3821d768 | 2065 | |
e3deec09 | 2066 | buffer = kmalloc(vpd_len, GFP_KERNEL); |
3821d768 | 2067 | |
e3deec09 JB |
2068 | if (!buffer || |
2069 | /* Block Device Characteristics VPD */ | |
2070 | scsi_get_vpd_page(sdkp->device, 0xb1, buffer, vpd_len)) | |
2071 | goto out; | |
3821d768 MP |
2072 | |
2073 | rot = get_unaligned_be16(&buffer[4]); | |
2074 | ||
2075 | if (rot == 1) | |
2076 | queue_flag_set_unlocked(QUEUE_FLAG_NONROT, sdkp->disk->queue); | |
2077 | ||
e3deec09 | 2078 | out: |
3821d768 MP |
2079 | kfree(buffer); |
2080 | } | |
2081 | ||
ffd4bc2a MP |
2082 | static int sd_try_extended_inquiry(struct scsi_device *sdp) |
2083 | { | |
2084 | /* | |
2085 | * Although VPD inquiries can go to SCSI-2 type devices, | |
2086 | * some USB ones crash on receiving them, and the pages | |
2087 | * we currently ask for are for SPC-3 and beyond | |
2088 | */ | |
2089 | if (sdp->scsi_level > SCSI_SPC_2) | |
2090 | return 1; | |
2091 | return 0; | |
2092 | } | |
2093 | ||
1da177e4 LT |
2094 | /** |
2095 | * sd_revalidate_disk - called the first time a new disk is seen, | |
2096 | * performs disk spin up, read_capacity, etc. | |
2097 | * @disk: struct gendisk we care about | |
2098 | **/ | |
2099 | static int sd_revalidate_disk(struct gendisk *disk) | |
2100 | { | |
2101 | struct scsi_disk *sdkp = scsi_disk(disk); | |
2102 | struct scsi_device *sdp = sdkp->device; | |
1da177e4 | 2103 | unsigned char *buffer; |
461d4e90 | 2104 | unsigned ordered; |
1da177e4 | 2105 | |
fa0d34be MP |
2106 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, |
2107 | "sd_revalidate_disk\n")); | |
1da177e4 LT |
2108 | |
2109 | /* | |
2110 | * If the device is offline, don't try and read capacity or any | |
2111 | * of the other niceties. | |
2112 | */ | |
2113 | if (!scsi_device_online(sdp)) | |
2114 | goto out; | |
2115 | ||
a6123f14 | 2116 | buffer = kmalloc(SD_BUF_SIZE, GFP_KERNEL); |
1da177e4 | 2117 | if (!buffer) { |
e73aec82 MP |
2118 | sd_printk(KERN_WARNING, sdkp, "sd_revalidate_disk: Memory " |
2119 | "allocation failure.\n"); | |
ea73a9f2 | 2120 | goto out; |
1da177e4 LT |
2121 | } |
2122 | ||
e73aec82 | 2123 | sd_spinup_disk(sdkp); |
1da177e4 LT |
2124 | |
2125 | /* | |
2126 | * Without media there is no reason to ask; moreover, some devices | |
2127 | * react badly if we do. | |
2128 | */ | |
2129 | if (sdkp->media_present) { | |
e73aec82 | 2130 | sd_read_capacity(sdkp, buffer); |
ffd4bc2a MP |
2131 | |
2132 | if (sd_try_extended_inquiry(sdp)) { | |
2133 | sd_read_block_limits(sdkp); | |
2134 | sd_read_block_characteristics(sdkp); | |
2135 | } | |
2136 | ||
e73aec82 MP |
2137 | sd_read_write_protect_flag(sdkp, buffer); |
2138 | sd_read_cache_type(sdkp, buffer); | |
e0597d70 | 2139 | sd_read_app_tag_own(sdkp, buffer); |
1da177e4 | 2140 | } |
461d4e90 | 2141 | |
70a9b873 MP |
2142 | sdkp->first_scan = 0; |
2143 | ||
461d4e90 TH |
2144 | /* |
2145 | * We now have all cache related info, determine how we deal | |
2146 | * with ordered requests. Note that as the current SCSI | |
2147 | * dispatch function can alter request order, we cannot use | |
2148 | * QUEUE_ORDERED_TAG_* even when ordered tag is supported. | |
2149 | */ | |
2150 | if (sdkp->WCE) | |
007365ad TH |
2151 | ordered = sdkp->DPOFUA |
2152 | ? QUEUE_ORDERED_DRAIN_FUA : QUEUE_ORDERED_DRAIN_FLUSH; | |
461d4e90 TH |
2153 | else |
2154 | ordered = QUEUE_ORDERED_DRAIN; | |
2155 | ||
00fff265 | 2156 | blk_queue_ordered(sdkp->disk->queue, ordered); |
461d4e90 | 2157 | |
1da177e4 LT |
2158 | set_capacity(disk, sdkp->capacity); |
2159 | kfree(buffer); | |
2160 | ||
1da177e4 LT |
2161 | out: |
2162 | return 0; | |
2163 | } | |
2164 | ||
72ec24bd TH |
2165 | /** |
2166 | * sd_unlock_native_capacity - unlock native capacity | |
2167 | * @disk: struct gendisk to set capacity for | |
2168 | * | |
2169 | * Block layer calls this function if it detects that partitions | |
2170 | * on @disk reach beyond the end of the device. If the SCSI host | |
2171 | * implements ->unlock_native_capacity() method, it's invoked to | |
2172 | * give it a chance to adjust the device capacity. | |
2173 | * | |
2174 | * CONTEXT: | |
2175 | * Defined by block layer. Might sleep. | |
2176 | */ | |
2177 | static void sd_unlock_native_capacity(struct gendisk *disk) | |
2178 | { | |
2179 | struct scsi_device *sdev = scsi_disk(disk)->device; | |
2180 | ||
2181 | if (sdev->host->hostt->unlock_native_capacity) | |
2182 | sdev->host->hostt->unlock_native_capacity(sdev); | |
2183 | } | |
2184 | ||
3e1a7ff8 TH |
2185 | /** |
2186 | * sd_format_disk_name - format disk name | |
2187 | * @prefix: name prefix - ie. "sd" for SCSI disks | |
2188 | * @index: index of the disk to format name for | |
2189 | * @buf: output buffer | |
2190 | * @buflen: length of the output buffer | |
2191 | * | |
2192 | * SCSI disk names starts at sda. The 26th device is sdz and the | |
2193 | * 27th is sdaa. The last one for two lettered suffix is sdzz | |
2194 | * which is followed by sdaaa. | |
2195 | * | |
2196 | * This is basically 26 base counting with one extra 'nil' entry | |
3ad2f3fb | 2197 | * at the beginning from the second digit on and can be |
3e1a7ff8 TH |
2198 | * determined using similar method as 26 base conversion with the |
2199 | * index shifted -1 after each digit is computed. | |
2200 | * | |
2201 | * CONTEXT: | |
2202 | * Don't care. | |
2203 | * | |
2204 | * RETURNS: | |
2205 | * 0 on success, -errno on failure. | |
2206 | */ | |
2207 | static int sd_format_disk_name(char *prefix, int index, char *buf, int buflen) | |
2208 | { | |
2209 | const int base = 'z' - 'a' + 1; | |
2210 | char *begin = buf + strlen(prefix); | |
2211 | char *end = buf + buflen; | |
2212 | char *p; | |
2213 | int unit; | |
2214 | ||
2215 | p = end - 1; | |
2216 | *p = '\0'; | |
2217 | unit = base; | |
2218 | do { | |
2219 | if (p == begin) | |
2220 | return -EINVAL; | |
2221 | *--p = 'a' + (index % unit); | |
2222 | index = (index / unit) - 1; | |
2223 | } while (index >= 0); | |
2224 | ||
2225 | memmove(begin, p, end - p); | |
2226 | memcpy(buf, prefix, strlen(prefix)); | |
2227 | ||
2228 | return 0; | |
2229 | } | |
2230 | ||
4ace92fc AV |
2231 | /* |
2232 | * The asynchronous part of sd_probe | |
2233 | */ | |
2234 | static void sd_probe_async(void *data, async_cookie_t cookie) | |
2235 | { | |
2236 | struct scsi_disk *sdkp = data; | |
2237 | struct scsi_device *sdp; | |
2238 | struct gendisk *gd; | |
2239 | u32 index; | |
2240 | struct device *dev; | |
2241 | ||
2242 | sdp = sdkp->device; | |
2243 | gd = sdkp->disk; | |
2244 | index = sdkp->index; | |
2245 | dev = &sdp->sdev_gendev; | |
2246 | ||
4ace92fc AV |
2247 | if (index < SD_MAX_DISKS) { |
2248 | gd->major = sd_major((index & 0xf0) >> 4); | |
2249 | gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00); | |
2250 | gd->minors = SD_MINORS; | |
2251 | } | |
2252 | gd->fops = &sd_fops; | |
2253 | gd->private_data = &sdkp->driver; | |
2254 | gd->queue = sdkp->device->request_queue; | |
2255 | ||
70a9b873 MP |
2256 | /* defaults, until the device tells us otherwise */ |
2257 | sdp->sector_size = 512; | |
2258 | sdkp->capacity = 0; | |
2259 | sdkp->media_present = 1; | |
2260 | sdkp->write_prot = 0; | |
2261 | sdkp->WCE = 0; | |
2262 | sdkp->RCD = 0; | |
2263 | sdkp->ATO = 0; | |
2264 | sdkp->first_scan = 1; | |
2265 | ||
4ace92fc AV |
2266 | sd_revalidate_disk(gd); |
2267 | ||
2268 | blk_queue_prep_rq(sdp->request_queue, sd_prep_fn); | |
f1126e95 | 2269 | blk_queue_unprep_rq(sdp->request_queue, sd_unprep_fn); |
4ace92fc AV |
2270 | |
2271 | gd->driverfs_dev = &sdp->sdev_gendev; | |
97fedbbe | 2272 | gd->flags = GENHD_FL_EXT_DEVT; |
4ace92fc AV |
2273 | if (sdp->removable) |
2274 | gd->flags |= GENHD_FL_REMOVABLE; | |
2275 | ||
2276 | dev_set_drvdata(dev, sdkp); | |
2277 | add_disk(gd); | |
2278 | sd_dif_config_host(sdkp); | |
2279 | ||
3821d768 MP |
2280 | sd_revalidate_disk(gd); |
2281 | ||
4ace92fc AV |
2282 | sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n", |
2283 | sdp->removable ? "removable " : ""); | |
ea038f63 | 2284 | put_device(&sdkp->dev); |
4ace92fc AV |
2285 | } |
2286 | ||
1da177e4 LT |
2287 | /** |
2288 | * sd_probe - called during driver initialization and whenever a | |
2289 | * new scsi device is attached to the system. It is called once | |
2290 | * for each scsi device (not just disks) present. | |
2291 | * @dev: pointer to device object | |
2292 | * | |
2293 | * Returns 0 if successful (or not interested in this scsi device | |
2294 | * (e.g. scanner)); 1 when there is an error. | |
2295 | * | |
2296 | * Note: this function is invoked from the scsi mid-level. | |
2297 | * This function sets up the mapping between a given | |
2298 | * <host,channel,id,lun> (found in sdp) and new device name | |
2299 | * (e.g. /dev/sda). More precisely it is the block device major | |
2300 | * and minor number that is chosen here. | |
2301 | * | |
2302 | * Assume sd_attach is not re-entrant (for time being) | |
2303 | * Also think about sd_attach() and sd_remove() running coincidentally. | |
2304 | **/ | |
2305 | static int sd_probe(struct device *dev) | |
2306 | { | |
2307 | struct scsi_device *sdp = to_scsi_device(dev); | |
2308 | struct scsi_disk *sdkp; | |
2309 | struct gendisk *gd; | |
2310 | u32 index; | |
2311 | int error; | |
2312 | ||
2313 | error = -ENODEV; | |
631e8a13 | 2314 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_MOD && sdp->type != TYPE_RBC) |
1da177e4 LT |
2315 | goto out; |
2316 | ||
9ccfc756 JB |
2317 | SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO, sdp, |
2318 | "sd_attach\n")); | |
1da177e4 LT |
2319 | |
2320 | error = -ENOMEM; | |
24669f75 | 2321 | sdkp = kzalloc(sizeof(*sdkp), GFP_KERNEL); |
1da177e4 LT |
2322 | if (!sdkp) |
2323 | goto out; | |
2324 | ||
689d6fac | 2325 | gd = alloc_disk(SD_MINORS); |
1da177e4 LT |
2326 | if (!gd) |
2327 | goto out_free; | |
2328 | ||
f27bac27 TH |
2329 | do { |
2330 | if (!ida_pre_get(&sd_index_ida, GFP_KERNEL)) | |
2331 | goto out_put; | |
1da177e4 | 2332 | |
4034cc68 | 2333 | spin_lock(&sd_index_lock); |
f27bac27 | 2334 | error = ida_get_new(&sd_index_ida, &index); |
4034cc68 | 2335 | spin_unlock(&sd_index_lock); |
f27bac27 | 2336 | } while (error == -EAGAIN); |
1da177e4 | 2337 | |
1da177e4 LT |
2338 | if (error) |
2339 | goto out_put; | |
2340 | ||
3e1a7ff8 TH |
2341 | error = sd_format_disk_name("sd", index, gd->disk_name, DISK_NAME_LEN); |
2342 | if (error) | |
f27bac27 TH |
2343 | goto out_free_index; |
2344 | ||
1da177e4 LT |
2345 | sdkp->device = sdp; |
2346 | sdkp->driver = &sd_template; | |
2347 | sdkp->disk = gd; | |
2348 | sdkp->index = index; | |
2349 | sdkp->openers = 0; | |
c02e6002 | 2350 | sdkp->previous_state = 1; |
1da177e4 | 2351 | |
601e7638 JB |
2352 | if (!sdp->request_queue->rq_timeout) { |
2353 | if (sdp->type != TYPE_MOD) | |
2354 | blk_queue_rq_timeout(sdp->request_queue, SD_TIMEOUT); | |
2355 | else | |
2356 | blk_queue_rq_timeout(sdp->request_queue, | |
2357 | SD_MOD_TIMEOUT); | |
2358 | } | |
2359 | ||
2360 | device_initialize(&sdkp->dev); | |
2361 | sdkp->dev.parent = &sdp->sdev_gendev; | |
2362 | sdkp->dev.class = &sd_disk_class; | |
2363 | dev_set_name(&sdkp->dev, dev_name(&sdp->sdev_gendev)); | |
2364 | ||
2365 | if (device_add(&sdkp->dev)) | |
2366 | goto out_free_index; | |
2367 | ||
2368 | get_device(&sdp->sdev_gendev); | |
2369 | ||
ea038f63 | 2370 | get_device(&sdkp->dev); /* prevent release before async_schedule */ |
4ace92fc | 2371 | async_schedule(sd_probe_async, sdkp); |
1da177e4 LT |
2372 | |
2373 | return 0; | |
2374 | ||
f27bac27 | 2375 | out_free_index: |
4034cc68 | 2376 | spin_lock(&sd_index_lock); |
f27bac27 | 2377 | ida_remove(&sd_index_ida, index); |
4034cc68 | 2378 | spin_unlock(&sd_index_lock); |
6bdaa1f1 | 2379 | out_put: |
1da177e4 | 2380 | put_disk(gd); |
6bdaa1f1 | 2381 | out_free: |
1da177e4 | 2382 | kfree(sdkp); |
6bdaa1f1 | 2383 | out: |
1da177e4 LT |
2384 | return error; |
2385 | } | |
2386 | ||
2387 | /** | |
2388 | * sd_remove - called whenever a scsi disk (previously recognized by | |
2389 | * sd_probe) is detached from the system. It is called (potentially | |
2390 | * multiple times) during sd module unload. | |
2391 | * @sdp: pointer to mid level scsi device object | |
2392 | * | |
2393 | * Note: this function is invoked from the scsi mid-level. | |
2394 | * This function potentially frees up a device name (e.g. /dev/sdc) | |
2395 | * that could be re-used by a subsequent sd_probe(). | |
2396 | * This function is not called when the built-in sd driver is "exit-ed". | |
2397 | **/ | |
2398 | static int sd_remove(struct device *dev) | |
2399 | { | |
601e7638 | 2400 | struct scsi_disk *sdkp; |
1da177e4 | 2401 | |
601e7638 JB |
2402 | async_synchronize_full(); |
2403 | sdkp = dev_get_drvdata(dev); | |
b391277a | 2404 | blk_queue_prep_rq(sdkp->device->request_queue, scsi_prep_fn); |
82b6d57f | 2405 | blk_queue_unprep_rq(sdkp->device->request_queue, NULL); |
ee959b00 | 2406 | device_del(&sdkp->dev); |
1da177e4 LT |
2407 | del_gendisk(sdkp->disk); |
2408 | sd_shutdown(dev); | |
39b7f1e2 | 2409 | |
0b950672 | 2410 | mutex_lock(&sd_ref_mutex); |
39b7f1e2 | 2411 | dev_set_drvdata(dev, NULL); |
ee959b00 | 2412 | put_device(&sdkp->dev); |
0b950672 | 2413 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
2414 | |
2415 | return 0; | |
2416 | } | |
2417 | ||
2418 | /** | |
2419 | * scsi_disk_release - Called to free the scsi_disk structure | |
ee959b00 | 2420 | * @dev: pointer to embedded class device |
1da177e4 | 2421 | * |
0b950672 | 2422 | * sd_ref_mutex must be held entering this routine. Because it is |
1da177e4 LT |
2423 | * called on last put, you should always use the scsi_disk_get() |
2424 | * scsi_disk_put() helpers which manipulate the semaphore directly | |
ee959b00 | 2425 | * and never do a direct put_device. |
1da177e4 | 2426 | **/ |
ee959b00 | 2427 | static void scsi_disk_release(struct device *dev) |
1da177e4 | 2428 | { |
ee959b00 | 2429 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
1da177e4 LT |
2430 | struct gendisk *disk = sdkp->disk; |
2431 | ||
4034cc68 | 2432 | spin_lock(&sd_index_lock); |
f27bac27 | 2433 | ida_remove(&sd_index_ida, sdkp->index); |
4034cc68 | 2434 | spin_unlock(&sd_index_lock); |
1da177e4 LT |
2435 | |
2436 | disk->private_data = NULL; | |
1da177e4 | 2437 | put_disk(disk); |
39b7f1e2 | 2438 | put_device(&sdkp->device->sdev_gendev); |
1da177e4 LT |
2439 | |
2440 | kfree(sdkp); | |
2441 | } | |
2442 | ||
cc5d2c8c | 2443 | static int sd_start_stop_device(struct scsi_disk *sdkp, int start) |
c3c94c5a TH |
2444 | { |
2445 | unsigned char cmd[6] = { START_STOP }; /* START_VALID */ | |
2446 | struct scsi_sense_hdr sshdr; | |
cc5d2c8c | 2447 | struct scsi_device *sdp = sdkp->device; |
c3c94c5a TH |
2448 | int res; |
2449 | ||
2450 | if (start) | |
2451 | cmd[4] |= 1; /* START */ | |
2452 | ||
d2886ea3 SR |
2453 | if (sdp->start_stop_pwr_cond) |
2454 | cmd[4] |= start ? 1 << 4 : 3 << 4; /* Active or Standby */ | |
2455 | ||
c3c94c5a TH |
2456 | if (!scsi_device_online(sdp)) |
2457 | return -ENODEV; | |
2458 | ||
2459 | res = scsi_execute_req(sdp, cmd, DMA_NONE, NULL, 0, &sshdr, | |
f4f4e47e | 2460 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); |
c3c94c5a | 2461 | if (res) { |
cc5d2c8c JB |
2462 | sd_printk(KERN_WARNING, sdkp, "START_STOP FAILED\n"); |
2463 | sd_print_result(sdkp, res); | |
c3c94c5a | 2464 | if (driver_byte(res) & DRIVER_SENSE) |
cc5d2c8c | 2465 | sd_print_sense_hdr(sdkp, &sshdr); |
c3c94c5a TH |
2466 | } |
2467 | ||
2468 | return res; | |
2469 | } | |
2470 | ||
1da177e4 LT |
2471 | /* |
2472 | * Send a SYNCHRONIZE CACHE instruction down to the device through | |
2473 | * the normal SCSI command structure. Wait for the command to | |
2474 | * complete. | |
2475 | */ | |
2476 | static void sd_shutdown(struct device *dev) | |
2477 | { | |
39b7f1e2 | 2478 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
1da177e4 LT |
2479 | |
2480 | if (!sdkp) | |
2481 | return; /* this can happen */ | |
2482 | ||
39b7f1e2 | 2483 | if (sdkp->WCE) { |
e73aec82 MP |
2484 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
2485 | sd_sync_cache(sdkp); | |
39b7f1e2 | 2486 | } |
c3c94c5a | 2487 | |
cc5d2c8c JB |
2488 | if (system_state != SYSTEM_RESTART && sdkp->device->manage_start_stop) { |
2489 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); | |
2490 | sd_start_stop_device(sdkp, 0); | |
c3c94c5a TH |
2491 | } |
2492 | ||
39b7f1e2 AS |
2493 | scsi_disk_put(sdkp); |
2494 | } | |
1da177e4 | 2495 | |
c3c94c5a TH |
2496 | static int sd_suspend(struct device *dev, pm_message_t mesg) |
2497 | { | |
c3c94c5a | 2498 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
09ff92fe | 2499 | int ret = 0; |
c3c94c5a TH |
2500 | |
2501 | if (!sdkp) | |
2502 | return 0; /* this can happen */ | |
2503 | ||
2504 | if (sdkp->WCE) { | |
cc5d2c8c | 2505 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
c3c94c5a TH |
2506 | ret = sd_sync_cache(sdkp); |
2507 | if (ret) | |
09ff92fe | 2508 | goto done; |
c3c94c5a TH |
2509 | } |
2510 | ||
3a2d5b70 | 2511 | if ((mesg.event & PM_EVENT_SLEEP) && sdkp->device->manage_start_stop) { |
cc5d2c8c JB |
2512 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); |
2513 | ret = sd_start_stop_device(sdkp, 0); | |
c3c94c5a TH |
2514 | } |
2515 | ||
09ff92fe AS |
2516 | done: |
2517 | scsi_disk_put(sdkp); | |
2518 | return ret; | |
c3c94c5a TH |
2519 | } |
2520 | ||
2521 | static int sd_resume(struct device *dev) | |
2522 | { | |
c3c94c5a | 2523 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
09ff92fe | 2524 | int ret = 0; |
c3c94c5a | 2525 | |
cc5d2c8c | 2526 | if (!sdkp->device->manage_start_stop) |
09ff92fe | 2527 | goto done; |
c3c94c5a | 2528 | |
cc5d2c8c | 2529 | sd_printk(KERN_NOTICE, sdkp, "Starting disk\n"); |
09ff92fe | 2530 | ret = sd_start_stop_device(sdkp, 1); |
c3c94c5a | 2531 | |
09ff92fe AS |
2532 | done: |
2533 | scsi_disk_put(sdkp); | |
2534 | return ret; | |
c3c94c5a TH |
2535 | } |
2536 | ||
1da177e4 LT |
2537 | /** |
2538 | * init_sd - entry point for this driver (both when built in or when | |
2539 | * a module). | |
2540 | * | |
2541 | * Note: this function registers this driver with the scsi mid-level. | |
2542 | **/ | |
2543 | static int __init init_sd(void) | |
2544 | { | |
5e4009ba | 2545 | int majors = 0, i, err; |
1da177e4 LT |
2546 | |
2547 | SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n")); | |
2548 | ||
2549 | for (i = 0; i < SD_MAJORS; i++) | |
2550 | if (register_blkdev(sd_major(i), "sd") == 0) | |
2551 | majors++; | |
2552 | ||
2553 | if (!majors) | |
2554 | return -ENODEV; | |
2555 | ||
5e4009ba JG |
2556 | err = class_register(&sd_disk_class); |
2557 | if (err) | |
2558 | goto err_out; | |
6bdaa1f1 | 2559 | |
5e4009ba JG |
2560 | err = scsi_register_driver(&sd_template.gendrv); |
2561 | if (err) | |
2562 | goto err_out_class; | |
2563 | ||
4e7392ec MP |
2564 | sd_cdb_cache = kmem_cache_create("sd_ext_cdb", SD_EXT_CDB_SIZE, |
2565 | 0, 0, NULL); | |
2566 | if (!sd_cdb_cache) { | |
2567 | printk(KERN_ERR "sd: can't init extended cdb cache\n"); | |
2568 | goto err_out_class; | |
2569 | } | |
2570 | ||
2571 | sd_cdb_pool = mempool_create_slab_pool(SD_MEMPOOL_SIZE, sd_cdb_cache); | |
2572 | if (!sd_cdb_pool) { | |
2573 | printk(KERN_ERR "sd: can't init extended cdb pool\n"); | |
2574 | goto err_out_cache; | |
2575 | } | |
2576 | ||
5e4009ba JG |
2577 | return 0; |
2578 | ||
4e7392ec MP |
2579 | err_out_cache: |
2580 | kmem_cache_destroy(sd_cdb_cache); | |
2581 | ||
5e4009ba JG |
2582 | err_out_class: |
2583 | class_unregister(&sd_disk_class); | |
2584 | err_out: | |
2585 | for (i = 0; i < SD_MAJORS; i++) | |
2586 | unregister_blkdev(sd_major(i), "sd"); | |
2587 | return err; | |
1da177e4 LT |
2588 | } |
2589 | ||
2590 | /** | |
2591 | * exit_sd - exit point for this driver (when it is a module). | |
2592 | * | |
2593 | * Note: this function unregisters this driver from the scsi mid-level. | |
2594 | **/ | |
2595 | static void __exit exit_sd(void) | |
2596 | { | |
2597 | int i; | |
2598 | ||
2599 | SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n")); | |
2600 | ||
4e7392ec MP |
2601 | mempool_destroy(sd_cdb_pool); |
2602 | kmem_cache_destroy(sd_cdb_cache); | |
2603 | ||
1da177e4 | 2604 | scsi_unregister_driver(&sd_template.gendrv); |
5e4009ba JG |
2605 | class_unregister(&sd_disk_class); |
2606 | ||
1da177e4 LT |
2607 | for (i = 0; i < SD_MAJORS; i++) |
2608 | unregister_blkdev(sd_major(i), "sd"); | |
2609 | } | |
2610 | ||
1da177e4 LT |
2611 | module_init(init_sd); |
2612 | module_exit(exit_sd); | |
e73aec82 MP |
2613 | |
2614 | static void sd_print_sense_hdr(struct scsi_disk *sdkp, | |
2615 | struct scsi_sense_hdr *sshdr) | |
2616 | { | |
2617 | sd_printk(KERN_INFO, sdkp, ""); | |
2618 | scsi_show_sense_hdr(sshdr); | |
2619 | sd_printk(KERN_INFO, sdkp, ""); | |
2620 | scsi_show_extd_sense(sshdr->asc, sshdr->ascq); | |
2621 | } | |
2622 | ||
2623 | static void sd_print_result(struct scsi_disk *sdkp, int result) | |
2624 | { | |
2625 | sd_printk(KERN_INFO, sdkp, ""); | |
2626 | scsi_show_result(result); | |
2627 | } | |
2628 |