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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 | ||
35 | #include <linux/module.h> | |
36 | #include <linux/fs.h> | |
37 | #include <linux/kernel.h> | |
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> | |
48 | #include <linux/delay.h> | |
49 | #include <linux/mutex.h> | |
50 | #include <linux/string_helpers.h> | |
51 | #include <linux/async.h> | |
52 | #include <linux/slab.h> | |
53 | #include <linux/sed-opal.h> | |
54 | #include <linux/pm_runtime.h> | |
55 | #include <linux/pr.h> | |
56 | #include <linux/t10-pi.h> | |
57 | #include <linux/uaccess.h> | |
58 | #include <asm/unaligned.h> | |
59 | ||
60 | #include <scsi/scsi.h> | |
61 | #include <scsi/scsi_cmnd.h> | |
62 | #include <scsi/scsi_dbg.h> | |
63 | #include <scsi/scsi_device.h> | |
64 | #include <scsi/scsi_driver.h> | |
65 | #include <scsi/scsi_eh.h> | |
66 | #include <scsi/scsi_host.h> | |
67 | #include <scsi/scsi_ioctl.h> | |
68 | #include <scsi/scsicam.h> | |
69 | ||
70 | #include "sd.h" | |
71 | #include "scsi_priv.h" | |
72 | #include "scsi_logging.h" | |
73 | ||
74 | MODULE_AUTHOR("Eric Youngdale"); | |
75 | MODULE_DESCRIPTION("SCSI disk (sd) driver"); | |
76 | MODULE_LICENSE("GPL"); | |
77 | ||
78 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK0_MAJOR); | |
79 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK1_MAJOR); | |
80 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK2_MAJOR); | |
81 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK3_MAJOR); | |
82 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK4_MAJOR); | |
83 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK5_MAJOR); | |
84 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK6_MAJOR); | |
85 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK7_MAJOR); | |
86 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK8_MAJOR); | |
87 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK9_MAJOR); | |
88 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK10_MAJOR); | |
89 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK11_MAJOR); | |
90 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK12_MAJOR); | |
91 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK13_MAJOR); | |
92 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK14_MAJOR); | |
93 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK15_MAJOR); | |
94 | MODULE_ALIAS_SCSI_DEVICE(TYPE_DISK); | |
95 | MODULE_ALIAS_SCSI_DEVICE(TYPE_MOD); | |
96 | MODULE_ALIAS_SCSI_DEVICE(TYPE_RBC); | |
97 | MODULE_ALIAS_SCSI_DEVICE(TYPE_ZBC); | |
98 | ||
99 | #if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT) | |
100 | #define SD_MINORS 16 | |
101 | #else | |
102 | #define SD_MINORS 0 | |
103 | #endif | |
104 | ||
105 | static void sd_config_discard(struct scsi_disk *, unsigned int); | |
106 | static void sd_config_write_same(struct scsi_disk *); | |
107 | static int sd_revalidate_disk(struct gendisk *); | |
108 | static void sd_unlock_native_capacity(struct gendisk *disk); | |
109 | static int sd_probe(struct device *); | |
110 | static int sd_remove(struct device *); | |
111 | static void sd_shutdown(struct device *); | |
112 | static int sd_suspend_system(struct device *); | |
113 | static int sd_suspend_runtime(struct device *); | |
114 | static int sd_resume(struct device *); | |
115 | static void sd_rescan(struct device *); | |
116 | static int sd_init_command(struct scsi_cmnd *SCpnt); | |
117 | static void sd_uninit_command(struct scsi_cmnd *SCpnt); | |
118 | static int sd_done(struct scsi_cmnd *); | |
119 | static void sd_eh_reset(struct scsi_cmnd *); | |
120 | static int sd_eh_action(struct scsi_cmnd *, int); | |
121 | static void sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer); | |
122 | static void scsi_disk_release(struct device *cdev); | |
123 | static void sd_print_sense_hdr(struct scsi_disk *, struct scsi_sense_hdr *); | |
124 | static void sd_print_result(const struct scsi_disk *, const char *, int); | |
125 | ||
126 | static DEFINE_SPINLOCK(sd_index_lock); | |
127 | static DEFINE_IDA(sd_index_ida); | |
128 | ||
129 | /* This semaphore is used to mediate the 0->1 reference get in the | |
130 | * face of object destruction (i.e. we can't allow a get on an | |
131 | * object after last put) */ | |
132 | static DEFINE_MUTEX(sd_ref_mutex); | |
133 | ||
134 | static struct kmem_cache *sd_cdb_cache; | |
135 | static mempool_t *sd_cdb_pool; | |
136 | ||
137 | static const char *sd_cache_types[] = { | |
138 | "write through", "none", "write back", | |
139 | "write back, no read (daft)" | |
140 | }; | |
141 | ||
142 | static void sd_set_flush_flag(struct scsi_disk *sdkp) | |
143 | { | |
144 | bool wc = false, fua = false; | |
145 | ||
146 | if (sdkp->WCE) { | |
147 | wc = true; | |
148 | if (sdkp->DPOFUA) | |
149 | fua = true; | |
150 | } | |
151 | ||
152 | blk_queue_write_cache(sdkp->disk->queue, wc, fua); | |
153 | } | |
154 | ||
155 | static ssize_t | |
156 | cache_type_store(struct device *dev, struct device_attribute *attr, | |
157 | const char *buf, size_t count) | |
158 | { | |
159 | int ct, rcd, wce, sp; | |
160 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
161 | struct scsi_device *sdp = sdkp->device; | |
162 | char buffer[64]; | |
163 | char *buffer_data; | |
164 | struct scsi_mode_data data; | |
165 | struct scsi_sense_hdr sshdr; | |
166 | static const char temp[] = "temporary "; | |
167 | int len; | |
168 | ||
169 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) | |
170 | /* no cache control on RBC devices; theoretically they | |
171 | * can do it, but there's probably so many exceptions | |
172 | * it's not worth the risk */ | |
173 | return -EINVAL; | |
174 | ||
175 | if (strncmp(buf, temp, sizeof(temp) - 1) == 0) { | |
176 | buf += sizeof(temp) - 1; | |
177 | sdkp->cache_override = 1; | |
178 | } else { | |
179 | sdkp->cache_override = 0; | |
180 | } | |
181 | ||
182 | ct = sysfs_match_string(sd_cache_types, buf); | |
183 | if (ct < 0) | |
184 | return -EINVAL; | |
185 | ||
186 | rcd = ct & 0x01 ? 1 : 0; | |
187 | wce = (ct & 0x02) && !sdkp->write_prot ? 1 : 0; | |
188 | ||
189 | if (sdkp->cache_override) { | |
190 | sdkp->WCE = wce; | |
191 | sdkp->RCD = rcd; | |
192 | sd_set_flush_flag(sdkp); | |
193 | return count; | |
194 | } | |
195 | ||
196 | if (scsi_mode_sense(sdp, 0x08, 8, buffer, sizeof(buffer), SD_TIMEOUT, | |
197 | SD_MAX_RETRIES, &data, NULL)) | |
198 | return -EINVAL; | |
199 | len = min_t(size_t, sizeof(buffer), data.length - data.header_length - | |
200 | data.block_descriptor_length); | |
201 | buffer_data = buffer + data.header_length + | |
202 | data.block_descriptor_length; | |
203 | buffer_data[2] &= ~0x05; | |
204 | buffer_data[2] |= wce << 2 | rcd; | |
205 | sp = buffer_data[0] & 0x80 ? 1 : 0; | |
206 | buffer_data[0] &= ~0x80; | |
207 | ||
208 | if (scsi_mode_select(sdp, 1, sp, 8, buffer_data, len, SD_TIMEOUT, | |
209 | SD_MAX_RETRIES, &data, &sshdr)) { | |
210 | if (scsi_sense_valid(&sshdr)) | |
211 | sd_print_sense_hdr(sdkp, &sshdr); | |
212 | return -EINVAL; | |
213 | } | |
214 | revalidate_disk(sdkp->disk); | |
215 | return count; | |
216 | } | |
217 | ||
218 | static ssize_t | |
219 | manage_start_stop_show(struct device *dev, struct device_attribute *attr, | |
220 | char *buf) | |
221 | { | |
222 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
223 | struct scsi_device *sdp = sdkp->device; | |
224 | ||
225 | return sprintf(buf, "%u\n", sdp->manage_start_stop); | |
226 | } | |
227 | ||
228 | static ssize_t | |
229 | manage_start_stop_store(struct device *dev, struct device_attribute *attr, | |
230 | const char *buf, size_t count) | |
231 | { | |
232 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
233 | struct scsi_device *sdp = sdkp->device; | |
234 | ||
235 | if (!capable(CAP_SYS_ADMIN)) | |
236 | return -EACCES; | |
237 | ||
238 | sdp->manage_start_stop = simple_strtoul(buf, NULL, 10); | |
239 | ||
240 | return count; | |
241 | } | |
242 | static DEVICE_ATTR_RW(manage_start_stop); | |
243 | ||
244 | static ssize_t | |
245 | allow_restart_show(struct device *dev, struct device_attribute *attr, char *buf) | |
246 | { | |
247 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
248 | ||
249 | return sprintf(buf, "%u\n", sdkp->device->allow_restart); | |
250 | } | |
251 | ||
252 | static ssize_t | |
253 | allow_restart_store(struct device *dev, struct device_attribute *attr, | |
254 | const char *buf, size_t count) | |
255 | { | |
256 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
257 | struct scsi_device *sdp = sdkp->device; | |
258 | ||
259 | if (!capable(CAP_SYS_ADMIN)) | |
260 | return -EACCES; | |
261 | ||
262 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) | |
263 | return -EINVAL; | |
264 | ||
265 | sdp->allow_restart = simple_strtoul(buf, NULL, 10); | |
266 | ||
267 | return count; | |
268 | } | |
269 | static DEVICE_ATTR_RW(allow_restart); | |
270 | ||
271 | static ssize_t | |
272 | cache_type_show(struct device *dev, struct device_attribute *attr, char *buf) | |
273 | { | |
274 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
275 | int ct = sdkp->RCD + 2*sdkp->WCE; | |
276 | ||
277 | return sprintf(buf, "%s\n", sd_cache_types[ct]); | |
278 | } | |
279 | static DEVICE_ATTR_RW(cache_type); | |
280 | ||
281 | static ssize_t | |
282 | FUA_show(struct device *dev, struct device_attribute *attr, char *buf) | |
283 | { | |
284 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
285 | ||
286 | return sprintf(buf, "%u\n", sdkp->DPOFUA); | |
287 | } | |
288 | static DEVICE_ATTR_RO(FUA); | |
289 | ||
290 | static ssize_t | |
291 | protection_type_show(struct device *dev, struct device_attribute *attr, | |
292 | char *buf) | |
293 | { | |
294 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
295 | ||
296 | return sprintf(buf, "%u\n", sdkp->protection_type); | |
297 | } | |
298 | ||
299 | static ssize_t | |
300 | protection_type_store(struct device *dev, struct device_attribute *attr, | |
301 | const char *buf, size_t count) | |
302 | { | |
303 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
304 | unsigned int val; | |
305 | int err; | |
306 | ||
307 | if (!capable(CAP_SYS_ADMIN)) | |
308 | return -EACCES; | |
309 | ||
310 | err = kstrtouint(buf, 10, &val); | |
311 | ||
312 | if (err) | |
313 | return err; | |
314 | ||
315 | if (val >= 0 && val <= T10_PI_TYPE3_PROTECTION) | |
316 | sdkp->protection_type = val; | |
317 | ||
318 | return count; | |
319 | } | |
320 | static DEVICE_ATTR_RW(protection_type); | |
321 | ||
322 | static ssize_t | |
323 | protection_mode_show(struct device *dev, struct device_attribute *attr, | |
324 | char *buf) | |
325 | { | |
326 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
327 | struct scsi_device *sdp = sdkp->device; | |
328 | unsigned int dif, dix; | |
329 | ||
330 | dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type); | |
331 | dix = scsi_host_dix_capable(sdp->host, sdkp->protection_type); | |
332 | ||
333 | if (!dix && scsi_host_dix_capable(sdp->host, T10_PI_TYPE0_PROTECTION)) { | |
334 | dif = 0; | |
335 | dix = 1; | |
336 | } | |
337 | ||
338 | if (!dif && !dix) | |
339 | return sprintf(buf, "none\n"); | |
340 | ||
341 | return sprintf(buf, "%s%u\n", dix ? "dix" : "dif", dif); | |
342 | } | |
343 | static DEVICE_ATTR_RO(protection_mode); | |
344 | ||
345 | static ssize_t | |
346 | app_tag_own_show(struct device *dev, struct device_attribute *attr, char *buf) | |
347 | { | |
348 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
349 | ||
350 | return sprintf(buf, "%u\n", sdkp->ATO); | |
351 | } | |
352 | static DEVICE_ATTR_RO(app_tag_own); | |
353 | ||
354 | static ssize_t | |
355 | thin_provisioning_show(struct device *dev, struct device_attribute *attr, | |
356 | char *buf) | |
357 | { | |
358 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
359 | ||
360 | return sprintf(buf, "%u\n", sdkp->lbpme); | |
361 | } | |
362 | static DEVICE_ATTR_RO(thin_provisioning); | |
363 | ||
364 | /* sysfs_match_string() requires dense arrays */ | |
365 | static const char *lbp_mode[] = { | |
366 | [SD_LBP_FULL] = "full", | |
367 | [SD_LBP_UNMAP] = "unmap", | |
368 | [SD_LBP_WS16] = "writesame_16", | |
369 | [SD_LBP_WS10] = "writesame_10", | |
370 | [SD_LBP_ZERO] = "writesame_zero", | |
371 | [SD_LBP_DISABLE] = "disabled", | |
372 | }; | |
373 | ||
374 | static ssize_t | |
375 | provisioning_mode_show(struct device *dev, struct device_attribute *attr, | |
376 | char *buf) | |
377 | { | |
378 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
379 | ||
380 | return sprintf(buf, "%s\n", lbp_mode[sdkp->provisioning_mode]); | |
381 | } | |
382 | ||
383 | static ssize_t | |
384 | provisioning_mode_store(struct device *dev, struct device_attribute *attr, | |
385 | const char *buf, size_t count) | |
386 | { | |
387 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
388 | struct scsi_device *sdp = sdkp->device; | |
389 | int mode; | |
390 | ||
391 | if (!capable(CAP_SYS_ADMIN)) | |
392 | return -EACCES; | |
393 | ||
394 | if (sd_is_zoned(sdkp)) { | |
395 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
396 | return count; | |
397 | } | |
398 | ||
399 | if (sdp->type != TYPE_DISK) | |
400 | return -EINVAL; | |
401 | ||
402 | mode = sysfs_match_string(lbp_mode, buf); | |
403 | if (mode < 0) | |
404 | return -EINVAL; | |
405 | ||
406 | sd_config_discard(sdkp, mode); | |
407 | ||
408 | return count; | |
409 | } | |
410 | static DEVICE_ATTR_RW(provisioning_mode); | |
411 | ||
412 | /* sysfs_match_string() requires dense arrays */ | |
413 | static const char *zeroing_mode[] = { | |
414 | [SD_ZERO_WRITE] = "write", | |
415 | [SD_ZERO_WS] = "writesame", | |
416 | [SD_ZERO_WS16_UNMAP] = "writesame_16_unmap", | |
417 | [SD_ZERO_WS10_UNMAP] = "writesame_10_unmap", | |
418 | }; | |
419 | ||
420 | static ssize_t | |
421 | zeroing_mode_show(struct device *dev, struct device_attribute *attr, | |
422 | char *buf) | |
423 | { | |
424 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
425 | ||
426 | return sprintf(buf, "%s\n", zeroing_mode[sdkp->zeroing_mode]); | |
427 | } | |
428 | ||
429 | static ssize_t | |
430 | zeroing_mode_store(struct device *dev, struct device_attribute *attr, | |
431 | const char *buf, size_t count) | |
432 | { | |
433 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
434 | int mode; | |
435 | ||
436 | if (!capable(CAP_SYS_ADMIN)) | |
437 | return -EACCES; | |
438 | ||
439 | mode = sysfs_match_string(zeroing_mode, buf); | |
440 | if (mode < 0) | |
441 | return -EINVAL; | |
442 | ||
443 | sdkp->zeroing_mode = mode; | |
444 | ||
445 | return count; | |
446 | } | |
447 | static DEVICE_ATTR_RW(zeroing_mode); | |
448 | ||
449 | static ssize_t | |
450 | max_medium_access_timeouts_show(struct device *dev, | |
451 | struct device_attribute *attr, char *buf) | |
452 | { | |
453 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
454 | ||
455 | return sprintf(buf, "%u\n", sdkp->max_medium_access_timeouts); | |
456 | } | |
457 | ||
458 | static ssize_t | |
459 | max_medium_access_timeouts_store(struct device *dev, | |
460 | struct device_attribute *attr, const char *buf, | |
461 | size_t count) | |
462 | { | |
463 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
464 | int err; | |
465 | ||
466 | if (!capable(CAP_SYS_ADMIN)) | |
467 | return -EACCES; | |
468 | ||
469 | err = kstrtouint(buf, 10, &sdkp->max_medium_access_timeouts); | |
470 | ||
471 | return err ? err : count; | |
472 | } | |
473 | static DEVICE_ATTR_RW(max_medium_access_timeouts); | |
474 | ||
475 | static ssize_t | |
476 | max_write_same_blocks_show(struct device *dev, struct device_attribute *attr, | |
477 | char *buf) | |
478 | { | |
479 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
480 | ||
481 | return sprintf(buf, "%u\n", sdkp->max_ws_blocks); | |
482 | } | |
483 | ||
484 | static ssize_t | |
485 | max_write_same_blocks_store(struct device *dev, struct device_attribute *attr, | |
486 | const char *buf, size_t count) | |
487 | { | |
488 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
489 | struct scsi_device *sdp = sdkp->device; | |
490 | unsigned long max; | |
491 | int err; | |
492 | ||
493 | if (!capable(CAP_SYS_ADMIN)) | |
494 | return -EACCES; | |
495 | ||
496 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) | |
497 | return -EINVAL; | |
498 | ||
499 | err = kstrtoul(buf, 10, &max); | |
500 | ||
501 | if (err) | |
502 | return err; | |
503 | ||
504 | if (max == 0) | |
505 | sdp->no_write_same = 1; | |
506 | else if (max <= SD_MAX_WS16_BLOCKS) { | |
507 | sdp->no_write_same = 0; | |
508 | sdkp->max_ws_blocks = max; | |
509 | } | |
510 | ||
511 | sd_config_write_same(sdkp); | |
512 | ||
513 | return count; | |
514 | } | |
515 | static DEVICE_ATTR_RW(max_write_same_blocks); | |
516 | ||
517 | static struct attribute *sd_disk_attrs[] = { | |
518 | &dev_attr_cache_type.attr, | |
519 | &dev_attr_FUA.attr, | |
520 | &dev_attr_allow_restart.attr, | |
521 | &dev_attr_manage_start_stop.attr, | |
522 | &dev_attr_protection_type.attr, | |
523 | &dev_attr_protection_mode.attr, | |
524 | &dev_attr_app_tag_own.attr, | |
525 | &dev_attr_thin_provisioning.attr, | |
526 | &dev_attr_provisioning_mode.attr, | |
527 | &dev_attr_zeroing_mode.attr, | |
528 | &dev_attr_max_write_same_blocks.attr, | |
529 | &dev_attr_max_medium_access_timeouts.attr, | |
530 | NULL, | |
531 | }; | |
532 | ATTRIBUTE_GROUPS(sd_disk); | |
533 | ||
534 | static struct class sd_disk_class = { | |
535 | .name = "scsi_disk", | |
536 | .owner = THIS_MODULE, | |
537 | .dev_release = scsi_disk_release, | |
538 | .dev_groups = sd_disk_groups, | |
539 | }; | |
540 | ||
541 | static const struct dev_pm_ops sd_pm_ops = { | |
542 | .suspend = sd_suspend_system, | |
543 | .resume = sd_resume, | |
544 | .poweroff = sd_suspend_system, | |
545 | .restore = sd_resume, | |
546 | .runtime_suspend = sd_suspend_runtime, | |
547 | .runtime_resume = sd_resume, | |
548 | }; | |
549 | ||
550 | static struct scsi_driver sd_template = { | |
551 | .gendrv = { | |
552 | .name = "sd", | |
553 | .owner = THIS_MODULE, | |
554 | .probe = sd_probe, | |
555 | .remove = sd_remove, | |
556 | .shutdown = sd_shutdown, | |
557 | .pm = &sd_pm_ops, | |
558 | }, | |
559 | .rescan = sd_rescan, | |
560 | .init_command = sd_init_command, | |
561 | .uninit_command = sd_uninit_command, | |
562 | .done = sd_done, | |
563 | .eh_action = sd_eh_action, | |
564 | .eh_reset = sd_eh_reset, | |
565 | }; | |
566 | ||
567 | /* | |
568 | * Dummy kobj_map->probe function. | |
569 | * The default ->probe function will call modprobe, which is | |
570 | * pointless as this module is already loaded. | |
571 | */ | |
572 | static struct kobject *sd_default_probe(dev_t devt, int *partno, void *data) | |
573 | { | |
574 | return NULL; | |
575 | } | |
576 | ||
577 | /* | |
578 | * Device no to disk mapping: | |
579 | * | |
580 | * major disc2 disc p1 | |
581 | * |............|.............|....|....| <- dev_t | |
582 | * 31 20 19 8 7 4 3 0 | |
583 | * | |
584 | * Inside a major, we have 16k disks, however mapped non- | |
585 | * contiguously. The first 16 disks are for major0, the next | |
586 | * ones with major1, ... Disk 256 is for major0 again, disk 272 | |
587 | * for major1, ... | |
588 | * As we stay compatible with our numbering scheme, we can reuse | |
589 | * the well-know SCSI majors 8, 65--71, 136--143. | |
590 | */ | |
591 | static int sd_major(int major_idx) | |
592 | { | |
593 | switch (major_idx) { | |
594 | case 0: | |
595 | return SCSI_DISK0_MAJOR; | |
596 | case 1 ... 7: | |
597 | return SCSI_DISK1_MAJOR + major_idx - 1; | |
598 | case 8 ... 15: | |
599 | return SCSI_DISK8_MAJOR + major_idx - 8; | |
600 | default: | |
601 | BUG(); | |
602 | return 0; /* shut up gcc */ | |
603 | } | |
604 | } | |
605 | ||
606 | static struct scsi_disk *scsi_disk_get(struct gendisk *disk) | |
607 | { | |
608 | struct scsi_disk *sdkp = NULL; | |
609 | ||
610 | mutex_lock(&sd_ref_mutex); | |
611 | ||
612 | if (disk->private_data) { | |
613 | sdkp = scsi_disk(disk); | |
614 | if (scsi_device_get(sdkp->device) == 0) | |
615 | get_device(&sdkp->dev); | |
616 | else | |
617 | sdkp = NULL; | |
618 | } | |
619 | mutex_unlock(&sd_ref_mutex); | |
620 | return sdkp; | |
621 | } | |
622 | ||
623 | static void scsi_disk_put(struct scsi_disk *sdkp) | |
624 | { | |
625 | struct scsi_device *sdev = sdkp->device; | |
626 | ||
627 | mutex_lock(&sd_ref_mutex); | |
628 | put_device(&sdkp->dev); | |
629 | scsi_device_put(sdev); | |
630 | mutex_unlock(&sd_ref_mutex); | |
631 | } | |
632 | ||
633 | #ifdef CONFIG_BLK_SED_OPAL | |
634 | static int sd_sec_submit(void *data, u16 spsp, u8 secp, void *buffer, | |
635 | size_t len, bool send) | |
636 | { | |
637 | struct scsi_device *sdev = data; | |
638 | u8 cdb[12] = { 0, }; | |
639 | int ret; | |
640 | ||
641 | cdb[0] = send ? SECURITY_PROTOCOL_OUT : SECURITY_PROTOCOL_IN; | |
642 | cdb[1] = secp; | |
643 | put_unaligned_be16(spsp, &cdb[2]); | |
644 | put_unaligned_be32(len, &cdb[6]); | |
645 | ||
646 | ret = scsi_execute_req(sdev, cdb, | |
647 | send ? DMA_TO_DEVICE : DMA_FROM_DEVICE, | |
648 | buffer, len, NULL, SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
649 | return ret <= 0 ? ret : -EIO; | |
650 | } | |
651 | #endif /* CONFIG_BLK_SED_OPAL */ | |
652 | ||
653 | static unsigned char sd_setup_protect_cmnd(struct scsi_cmnd *scmd, | |
654 | unsigned int dix, unsigned int dif) | |
655 | { | |
656 | struct bio *bio = scmd->request->bio; | |
657 | unsigned int prot_op = sd_prot_op(rq_data_dir(scmd->request), dix, dif); | |
658 | unsigned int protect = 0; | |
659 | ||
660 | if (dix) { /* DIX Type 0, 1, 2, 3 */ | |
661 | if (bio_integrity_flagged(bio, BIP_IP_CHECKSUM)) | |
662 | scmd->prot_flags |= SCSI_PROT_IP_CHECKSUM; | |
663 | ||
664 | if (bio_integrity_flagged(bio, BIP_CTRL_NOCHECK) == false) | |
665 | scmd->prot_flags |= SCSI_PROT_GUARD_CHECK; | |
666 | } | |
667 | ||
668 | if (dif != T10_PI_TYPE3_PROTECTION) { /* DIX/DIF Type 0, 1, 2 */ | |
669 | scmd->prot_flags |= SCSI_PROT_REF_INCREMENT; | |
670 | ||
671 | if (bio_integrity_flagged(bio, BIP_CTRL_NOCHECK) == false) | |
672 | scmd->prot_flags |= SCSI_PROT_REF_CHECK; | |
673 | } | |
674 | ||
675 | if (dif) { /* DIX/DIF Type 1, 2, 3 */ | |
676 | scmd->prot_flags |= SCSI_PROT_TRANSFER_PI; | |
677 | ||
678 | if (bio_integrity_flagged(bio, BIP_DISK_NOCHECK)) | |
679 | protect = 3 << 5; /* Disable target PI checking */ | |
680 | else | |
681 | protect = 1 << 5; /* Enable target PI checking */ | |
682 | } | |
683 | ||
684 | scsi_set_prot_op(scmd, prot_op); | |
685 | scsi_set_prot_type(scmd, dif); | |
686 | scmd->prot_flags &= sd_prot_flag_mask(prot_op); | |
687 | ||
688 | return protect; | |
689 | } | |
690 | ||
691 | static void sd_config_discard(struct scsi_disk *sdkp, unsigned int mode) | |
692 | { | |
693 | struct request_queue *q = sdkp->disk->queue; | |
694 | unsigned int logical_block_size = sdkp->device->sector_size; | |
695 | unsigned int max_blocks = 0; | |
696 | ||
697 | q->limits.discard_alignment = | |
698 | sdkp->unmap_alignment * logical_block_size; | |
699 | q->limits.discard_granularity = | |
700 | max(sdkp->physical_block_size, | |
701 | sdkp->unmap_granularity * logical_block_size); | |
702 | sdkp->provisioning_mode = mode; | |
703 | ||
704 | switch (mode) { | |
705 | ||
706 | case SD_LBP_FULL: | |
707 | case SD_LBP_DISABLE: | |
708 | blk_queue_max_discard_sectors(q, 0); | |
709 | queue_flag_clear_unlocked(QUEUE_FLAG_DISCARD, q); | |
710 | return; | |
711 | ||
712 | case SD_LBP_UNMAP: | |
713 | max_blocks = min_not_zero(sdkp->max_unmap_blocks, | |
714 | (u32)SD_MAX_WS16_BLOCKS); | |
715 | break; | |
716 | ||
717 | case SD_LBP_WS16: | |
718 | if (sdkp->device->unmap_limit_for_ws) | |
719 | max_blocks = sdkp->max_unmap_blocks; | |
720 | else | |
721 | max_blocks = sdkp->max_ws_blocks; | |
722 | ||
723 | max_blocks = min_not_zero(max_blocks, (u32)SD_MAX_WS16_BLOCKS); | |
724 | break; | |
725 | ||
726 | case SD_LBP_WS10: | |
727 | if (sdkp->device->unmap_limit_for_ws) | |
728 | max_blocks = sdkp->max_unmap_blocks; | |
729 | else | |
730 | max_blocks = sdkp->max_ws_blocks; | |
731 | ||
732 | max_blocks = min_not_zero(max_blocks, (u32)SD_MAX_WS10_BLOCKS); | |
733 | break; | |
734 | ||
735 | case SD_LBP_ZERO: | |
736 | max_blocks = min_not_zero(sdkp->max_ws_blocks, | |
737 | (u32)SD_MAX_WS10_BLOCKS); | |
738 | break; | |
739 | } | |
740 | ||
741 | blk_queue_max_discard_sectors(q, max_blocks * (logical_block_size >> 9)); | |
742 | queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, q); | |
743 | } | |
744 | ||
745 | static int sd_setup_unmap_cmnd(struct scsi_cmnd *cmd) | |
746 | { | |
747 | struct scsi_device *sdp = cmd->device; | |
748 | struct request *rq = cmd->request; | |
749 | u64 sector = blk_rq_pos(rq) >> (ilog2(sdp->sector_size) - 9); | |
750 | u32 nr_sectors = blk_rq_sectors(rq) >> (ilog2(sdp->sector_size) - 9); | |
751 | unsigned int data_len = 24; | |
752 | char *buf; | |
753 | ||
754 | rq->special_vec.bv_page = alloc_page(GFP_ATOMIC | __GFP_ZERO); | |
755 | if (!rq->special_vec.bv_page) | |
756 | return BLKPREP_DEFER; | |
757 | rq->special_vec.bv_offset = 0; | |
758 | rq->special_vec.bv_len = data_len; | |
759 | rq->rq_flags |= RQF_SPECIAL_PAYLOAD; | |
760 | ||
761 | cmd->cmd_len = 10; | |
762 | cmd->cmnd[0] = UNMAP; | |
763 | cmd->cmnd[8] = 24; | |
764 | ||
765 | buf = page_address(rq->special_vec.bv_page); | |
766 | put_unaligned_be16(6 + 16, &buf[0]); | |
767 | put_unaligned_be16(16, &buf[2]); | |
768 | put_unaligned_be64(sector, &buf[8]); | |
769 | put_unaligned_be32(nr_sectors, &buf[16]); | |
770 | ||
771 | cmd->allowed = SD_MAX_RETRIES; | |
772 | cmd->transfersize = data_len; | |
773 | rq->timeout = SD_TIMEOUT; | |
774 | scsi_req(rq)->resid_len = data_len; | |
775 | ||
776 | return scsi_init_io(cmd); | |
777 | } | |
778 | ||
779 | static int sd_setup_write_same16_cmnd(struct scsi_cmnd *cmd, bool unmap) | |
780 | { | |
781 | struct scsi_device *sdp = cmd->device; | |
782 | struct request *rq = cmd->request; | |
783 | u64 sector = blk_rq_pos(rq) >> (ilog2(sdp->sector_size) - 9); | |
784 | u32 nr_sectors = blk_rq_sectors(rq) >> (ilog2(sdp->sector_size) - 9); | |
785 | u32 data_len = sdp->sector_size; | |
786 | ||
787 | rq->special_vec.bv_page = alloc_page(GFP_ATOMIC | __GFP_ZERO); | |
788 | if (!rq->special_vec.bv_page) | |
789 | return BLKPREP_DEFER; | |
790 | rq->special_vec.bv_offset = 0; | |
791 | rq->special_vec.bv_len = data_len; | |
792 | rq->rq_flags |= RQF_SPECIAL_PAYLOAD; | |
793 | ||
794 | cmd->cmd_len = 16; | |
795 | cmd->cmnd[0] = WRITE_SAME_16; | |
796 | if (unmap) | |
797 | cmd->cmnd[1] = 0x8; /* UNMAP */ | |
798 | put_unaligned_be64(sector, &cmd->cmnd[2]); | |
799 | put_unaligned_be32(nr_sectors, &cmd->cmnd[10]); | |
800 | ||
801 | cmd->allowed = SD_MAX_RETRIES; | |
802 | cmd->transfersize = data_len; | |
803 | rq->timeout = unmap ? SD_TIMEOUT : SD_WRITE_SAME_TIMEOUT; | |
804 | scsi_req(rq)->resid_len = data_len; | |
805 | ||
806 | return scsi_init_io(cmd); | |
807 | } | |
808 | ||
809 | static int sd_setup_write_same10_cmnd(struct scsi_cmnd *cmd, bool unmap) | |
810 | { | |
811 | struct scsi_device *sdp = cmd->device; | |
812 | struct request *rq = cmd->request; | |
813 | u64 sector = blk_rq_pos(rq) >> (ilog2(sdp->sector_size) - 9); | |
814 | u32 nr_sectors = blk_rq_sectors(rq) >> (ilog2(sdp->sector_size) - 9); | |
815 | u32 data_len = sdp->sector_size; | |
816 | ||
817 | rq->special_vec.bv_page = alloc_page(GFP_ATOMIC | __GFP_ZERO); | |
818 | if (!rq->special_vec.bv_page) | |
819 | return BLKPREP_DEFER; | |
820 | rq->special_vec.bv_offset = 0; | |
821 | rq->special_vec.bv_len = data_len; | |
822 | rq->rq_flags |= RQF_SPECIAL_PAYLOAD; | |
823 | ||
824 | cmd->cmd_len = 10; | |
825 | cmd->cmnd[0] = WRITE_SAME; | |
826 | if (unmap) | |
827 | cmd->cmnd[1] = 0x8; /* UNMAP */ | |
828 | put_unaligned_be32(sector, &cmd->cmnd[2]); | |
829 | put_unaligned_be16(nr_sectors, &cmd->cmnd[7]); | |
830 | ||
831 | cmd->allowed = SD_MAX_RETRIES; | |
832 | cmd->transfersize = data_len; | |
833 | rq->timeout = unmap ? SD_TIMEOUT : SD_WRITE_SAME_TIMEOUT; | |
834 | scsi_req(rq)->resid_len = data_len; | |
835 | ||
836 | return scsi_init_io(cmd); | |
837 | } | |
838 | ||
839 | static int sd_setup_write_zeroes_cmnd(struct scsi_cmnd *cmd) | |
840 | { | |
841 | struct request *rq = cmd->request; | |
842 | struct scsi_device *sdp = cmd->device; | |
843 | struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); | |
844 | u64 sector = blk_rq_pos(rq) >> (ilog2(sdp->sector_size) - 9); | |
845 | u32 nr_sectors = blk_rq_sectors(rq) >> (ilog2(sdp->sector_size) - 9); | |
846 | int ret; | |
847 | ||
848 | if (!(rq->cmd_flags & REQ_NOUNMAP)) { | |
849 | switch (sdkp->zeroing_mode) { | |
850 | case SD_ZERO_WS16_UNMAP: | |
851 | ret = sd_setup_write_same16_cmnd(cmd, true); | |
852 | goto out; | |
853 | case SD_ZERO_WS10_UNMAP: | |
854 | ret = sd_setup_write_same10_cmnd(cmd, true); | |
855 | goto out; | |
856 | } | |
857 | } | |
858 | ||
859 | if (sdp->no_write_same) | |
860 | return BLKPREP_INVALID; | |
861 | ||
862 | if (sdkp->ws16 || sector > 0xffffffff || nr_sectors > 0xffff) | |
863 | ret = sd_setup_write_same16_cmnd(cmd, false); | |
864 | else | |
865 | ret = sd_setup_write_same10_cmnd(cmd, false); | |
866 | ||
867 | out: | |
868 | if (sd_is_zoned(sdkp) && ret == BLKPREP_OK) | |
869 | return sd_zbc_write_lock_zone(cmd); | |
870 | ||
871 | return ret; | |
872 | } | |
873 | ||
874 | static void sd_config_write_same(struct scsi_disk *sdkp) | |
875 | { | |
876 | struct request_queue *q = sdkp->disk->queue; | |
877 | unsigned int logical_block_size = sdkp->device->sector_size; | |
878 | ||
879 | if (sdkp->device->no_write_same) { | |
880 | sdkp->max_ws_blocks = 0; | |
881 | goto out; | |
882 | } | |
883 | ||
884 | /* Some devices can not handle block counts above 0xffff despite | |
885 | * supporting WRITE SAME(16). Consequently we default to 64k | |
886 | * blocks per I/O unless the device explicitly advertises a | |
887 | * bigger limit. | |
888 | */ | |
889 | if (sdkp->max_ws_blocks > SD_MAX_WS10_BLOCKS) | |
890 | sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks, | |
891 | (u32)SD_MAX_WS16_BLOCKS); | |
892 | else if (sdkp->ws16 || sdkp->ws10 || sdkp->device->no_report_opcodes) | |
893 | sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks, | |
894 | (u32)SD_MAX_WS10_BLOCKS); | |
895 | else { | |
896 | sdkp->device->no_write_same = 1; | |
897 | sdkp->max_ws_blocks = 0; | |
898 | } | |
899 | ||
900 | if (sdkp->lbprz && sdkp->lbpws) | |
901 | sdkp->zeroing_mode = SD_ZERO_WS16_UNMAP; | |
902 | else if (sdkp->lbprz && sdkp->lbpws10) | |
903 | sdkp->zeroing_mode = SD_ZERO_WS10_UNMAP; | |
904 | else if (sdkp->max_ws_blocks) | |
905 | sdkp->zeroing_mode = SD_ZERO_WS; | |
906 | else | |
907 | sdkp->zeroing_mode = SD_ZERO_WRITE; | |
908 | ||
909 | out: | |
910 | blk_queue_max_write_same_sectors(q, sdkp->max_ws_blocks * | |
911 | (logical_block_size >> 9)); | |
912 | blk_queue_max_write_zeroes_sectors(q, sdkp->max_ws_blocks * | |
913 | (logical_block_size >> 9)); | |
914 | } | |
915 | ||
916 | /** | |
917 | * sd_setup_write_same_cmnd - write the same data to multiple blocks | |
918 | * @cmd: command to prepare | |
919 | * | |
920 | * Will set up either WRITE SAME(10) or WRITE SAME(16) depending on | |
921 | * the preference indicated by the target device. | |
922 | **/ | |
923 | static int sd_setup_write_same_cmnd(struct scsi_cmnd *cmd) | |
924 | { | |
925 | struct request *rq = cmd->request; | |
926 | struct scsi_device *sdp = cmd->device; | |
927 | struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); | |
928 | struct bio *bio = rq->bio; | |
929 | sector_t sector = blk_rq_pos(rq); | |
930 | unsigned int nr_sectors = blk_rq_sectors(rq); | |
931 | unsigned int nr_bytes = blk_rq_bytes(rq); | |
932 | int ret; | |
933 | ||
934 | if (sdkp->device->no_write_same) | |
935 | return BLKPREP_INVALID; | |
936 | ||
937 | BUG_ON(bio_offset(bio) || bio_iovec(bio).bv_len != sdp->sector_size); | |
938 | ||
939 | if (sd_is_zoned(sdkp)) { | |
940 | ret = sd_zbc_write_lock_zone(cmd); | |
941 | if (ret != BLKPREP_OK) | |
942 | return ret; | |
943 | } | |
944 | ||
945 | sector >>= ilog2(sdp->sector_size) - 9; | |
946 | nr_sectors >>= ilog2(sdp->sector_size) - 9; | |
947 | ||
948 | rq->timeout = SD_WRITE_SAME_TIMEOUT; | |
949 | ||
950 | if (sdkp->ws16 || sector > 0xffffffff || nr_sectors > 0xffff) { | |
951 | cmd->cmd_len = 16; | |
952 | cmd->cmnd[0] = WRITE_SAME_16; | |
953 | put_unaligned_be64(sector, &cmd->cmnd[2]); | |
954 | put_unaligned_be32(nr_sectors, &cmd->cmnd[10]); | |
955 | } else { | |
956 | cmd->cmd_len = 10; | |
957 | cmd->cmnd[0] = WRITE_SAME; | |
958 | put_unaligned_be32(sector, &cmd->cmnd[2]); | |
959 | put_unaligned_be16(nr_sectors, &cmd->cmnd[7]); | |
960 | } | |
961 | ||
962 | cmd->transfersize = sdp->sector_size; | |
963 | cmd->allowed = SD_MAX_RETRIES; | |
964 | ||
965 | /* | |
966 | * For WRITE SAME the data transferred via the DATA OUT buffer is | |
967 | * different from the amount of data actually written to the target. | |
968 | * | |
969 | * We set up __data_len to the amount of data transferred via the | |
970 | * DATA OUT buffer so that blk_rq_map_sg sets up the proper S/G list | |
971 | * to transfer a single sector of data first, but then reset it to | |
972 | * the amount of data to be written right after so that the I/O path | |
973 | * knows how much to actually write. | |
974 | */ | |
975 | rq->__data_len = sdp->sector_size; | |
976 | ret = scsi_init_io(cmd); | |
977 | rq->__data_len = nr_bytes; | |
978 | ||
979 | if (sd_is_zoned(sdkp) && ret != BLKPREP_OK) | |
980 | sd_zbc_write_unlock_zone(cmd); | |
981 | ||
982 | return ret; | |
983 | } | |
984 | ||
985 | static int sd_setup_flush_cmnd(struct scsi_cmnd *cmd) | |
986 | { | |
987 | struct request *rq = cmd->request; | |
988 | ||
989 | /* flush requests don't perform I/O, zero the S/G table */ | |
990 | memset(&cmd->sdb, 0, sizeof(cmd->sdb)); | |
991 | ||
992 | cmd->cmnd[0] = SYNCHRONIZE_CACHE; | |
993 | cmd->cmd_len = 10; | |
994 | cmd->transfersize = 0; | |
995 | cmd->allowed = SD_MAX_RETRIES; | |
996 | ||
997 | rq->timeout = rq->q->rq_timeout * SD_FLUSH_TIMEOUT_MULTIPLIER; | |
998 | return BLKPREP_OK; | |
999 | } | |
1000 | ||
1001 | static int sd_setup_read_write_cmnd(struct scsi_cmnd *SCpnt) | |
1002 | { | |
1003 | struct request *rq = SCpnt->request; | |
1004 | struct scsi_device *sdp = SCpnt->device; | |
1005 | struct gendisk *disk = rq->rq_disk; | |
1006 | struct scsi_disk *sdkp = scsi_disk(disk); | |
1007 | sector_t block = blk_rq_pos(rq); | |
1008 | sector_t threshold; | |
1009 | unsigned int this_count = blk_rq_sectors(rq); | |
1010 | unsigned int dif, dix; | |
1011 | bool zoned_write = sd_is_zoned(sdkp) && rq_data_dir(rq) == WRITE; | |
1012 | int ret; | |
1013 | unsigned char protect; | |
1014 | ||
1015 | if (zoned_write) { | |
1016 | ret = sd_zbc_write_lock_zone(SCpnt); | |
1017 | if (ret != BLKPREP_OK) | |
1018 | return ret; | |
1019 | } | |
1020 | ||
1021 | ret = scsi_init_io(SCpnt); | |
1022 | if (ret != BLKPREP_OK) | |
1023 | goto out; | |
1024 | SCpnt = rq->special; | |
1025 | ||
1026 | /* from here on until we're complete, any goto out | |
1027 | * is used for a killable error condition */ | |
1028 | ret = BLKPREP_KILL; | |
1029 | ||
1030 | SCSI_LOG_HLQUEUE(1, | |
1031 | scmd_printk(KERN_INFO, SCpnt, | |
1032 | "%s: block=%llu, count=%d\n", | |
1033 | __func__, (unsigned long long)block, this_count)); | |
1034 | ||
1035 | if (!sdp || !scsi_device_online(sdp) || | |
1036 | block + blk_rq_sectors(rq) > get_capacity(disk)) { | |
1037 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, | |
1038 | "Finishing %u sectors\n", | |
1039 | blk_rq_sectors(rq))); | |
1040 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, | |
1041 | "Retry with 0x%p\n", SCpnt)); | |
1042 | goto out; | |
1043 | } | |
1044 | ||
1045 | if (sdp->changed) { | |
1046 | /* | |
1047 | * quietly refuse to do anything to a changed disc until | |
1048 | * the changed bit has been reset | |
1049 | */ | |
1050 | /* printk("SCSI disk has been changed or is not present. Prohibiting further I/O.\n"); */ | |
1051 | goto out; | |
1052 | } | |
1053 | ||
1054 | /* | |
1055 | * Some SD card readers can't handle multi-sector accesses which touch | |
1056 | * the last one or two hardware sectors. Split accesses as needed. | |
1057 | */ | |
1058 | threshold = get_capacity(disk) - SD_LAST_BUGGY_SECTORS * | |
1059 | (sdp->sector_size / 512); | |
1060 | ||
1061 | if (unlikely(sdp->last_sector_bug && block + this_count > threshold)) { | |
1062 | if (block < threshold) { | |
1063 | /* Access up to the threshold but not beyond */ | |
1064 | this_count = threshold - block; | |
1065 | } else { | |
1066 | /* Access only a single hardware sector */ | |
1067 | this_count = sdp->sector_size / 512; | |
1068 | } | |
1069 | } | |
1070 | ||
1071 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, "block=%llu\n", | |
1072 | (unsigned long long)block)); | |
1073 | ||
1074 | /* | |
1075 | * If we have a 1K hardware sectorsize, prevent access to single | |
1076 | * 512 byte sectors. In theory we could handle this - in fact | |
1077 | * the scsi cdrom driver must be able to handle this because | |
1078 | * we typically use 1K blocksizes, and cdroms typically have | |
1079 | * 2K hardware sectorsizes. Of course, things are simpler | |
1080 | * with the cdrom, since it is read-only. For performance | |
1081 | * reasons, the filesystems should be able to handle this | |
1082 | * and not force the scsi disk driver to use bounce buffers | |
1083 | * for this. | |
1084 | */ | |
1085 | if (sdp->sector_size == 1024) { | |
1086 | if ((block & 1) || (blk_rq_sectors(rq) & 1)) { | |
1087 | scmd_printk(KERN_ERR, SCpnt, | |
1088 | "Bad block number requested\n"); | |
1089 | goto out; | |
1090 | } else { | |
1091 | block = block >> 1; | |
1092 | this_count = this_count >> 1; | |
1093 | } | |
1094 | } | |
1095 | if (sdp->sector_size == 2048) { | |
1096 | if ((block & 3) || (blk_rq_sectors(rq) & 3)) { | |
1097 | scmd_printk(KERN_ERR, SCpnt, | |
1098 | "Bad block number requested\n"); | |
1099 | goto out; | |
1100 | } else { | |
1101 | block = block >> 2; | |
1102 | this_count = this_count >> 2; | |
1103 | } | |
1104 | } | |
1105 | if (sdp->sector_size == 4096) { | |
1106 | if ((block & 7) || (blk_rq_sectors(rq) & 7)) { | |
1107 | scmd_printk(KERN_ERR, SCpnt, | |
1108 | "Bad block number requested\n"); | |
1109 | goto out; | |
1110 | } else { | |
1111 | block = block >> 3; | |
1112 | this_count = this_count >> 3; | |
1113 | } | |
1114 | } | |
1115 | if (rq_data_dir(rq) == WRITE) { | |
1116 | SCpnt->cmnd[0] = WRITE_6; | |
1117 | ||
1118 | if (blk_integrity_rq(rq)) | |
1119 | sd_dif_prepare(SCpnt); | |
1120 | ||
1121 | } else if (rq_data_dir(rq) == READ) { | |
1122 | SCpnt->cmnd[0] = READ_6; | |
1123 | } else { | |
1124 | scmd_printk(KERN_ERR, SCpnt, "Unknown command %d\n", req_op(rq)); | |
1125 | goto out; | |
1126 | } | |
1127 | ||
1128 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, | |
1129 | "%s %d/%u 512 byte blocks.\n", | |
1130 | (rq_data_dir(rq) == WRITE) ? | |
1131 | "writing" : "reading", this_count, | |
1132 | blk_rq_sectors(rq))); | |
1133 | ||
1134 | dix = scsi_prot_sg_count(SCpnt); | |
1135 | dif = scsi_host_dif_capable(SCpnt->device->host, sdkp->protection_type); | |
1136 | ||
1137 | if (dif || dix) | |
1138 | protect = sd_setup_protect_cmnd(SCpnt, dix, dif); | |
1139 | else | |
1140 | protect = 0; | |
1141 | ||
1142 | if (protect && sdkp->protection_type == T10_PI_TYPE2_PROTECTION) { | |
1143 | SCpnt->cmnd = mempool_alloc(sd_cdb_pool, GFP_ATOMIC); | |
1144 | ||
1145 | if (unlikely(SCpnt->cmnd == NULL)) { | |
1146 | ret = BLKPREP_DEFER; | |
1147 | goto out; | |
1148 | } | |
1149 | ||
1150 | SCpnt->cmd_len = SD_EXT_CDB_SIZE; | |
1151 | memset(SCpnt->cmnd, 0, SCpnt->cmd_len); | |
1152 | SCpnt->cmnd[0] = VARIABLE_LENGTH_CMD; | |
1153 | SCpnt->cmnd[7] = 0x18; | |
1154 | SCpnt->cmnd[9] = (rq_data_dir(rq) == READ) ? READ_32 : WRITE_32; | |
1155 | SCpnt->cmnd[10] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); | |
1156 | ||
1157 | /* LBA */ | |
1158 | SCpnt->cmnd[12] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0; | |
1159 | SCpnt->cmnd[13] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0; | |
1160 | SCpnt->cmnd[14] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0; | |
1161 | SCpnt->cmnd[15] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0; | |
1162 | SCpnt->cmnd[16] = (unsigned char) (block >> 24) & 0xff; | |
1163 | SCpnt->cmnd[17] = (unsigned char) (block >> 16) & 0xff; | |
1164 | SCpnt->cmnd[18] = (unsigned char) (block >> 8) & 0xff; | |
1165 | SCpnt->cmnd[19] = (unsigned char) block & 0xff; | |
1166 | ||
1167 | /* Expected Indirect LBA */ | |
1168 | SCpnt->cmnd[20] = (unsigned char) (block >> 24) & 0xff; | |
1169 | SCpnt->cmnd[21] = (unsigned char) (block >> 16) & 0xff; | |
1170 | SCpnt->cmnd[22] = (unsigned char) (block >> 8) & 0xff; | |
1171 | SCpnt->cmnd[23] = (unsigned char) block & 0xff; | |
1172 | ||
1173 | /* Transfer length */ | |
1174 | SCpnt->cmnd[28] = (unsigned char) (this_count >> 24) & 0xff; | |
1175 | SCpnt->cmnd[29] = (unsigned char) (this_count >> 16) & 0xff; | |
1176 | SCpnt->cmnd[30] = (unsigned char) (this_count >> 8) & 0xff; | |
1177 | SCpnt->cmnd[31] = (unsigned char) this_count & 0xff; | |
1178 | } else if (sdp->use_16_for_rw || (this_count > 0xffff)) { | |
1179 | SCpnt->cmnd[0] += READ_16 - READ_6; | |
1180 | SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); | |
1181 | SCpnt->cmnd[2] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0; | |
1182 | SCpnt->cmnd[3] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0; | |
1183 | SCpnt->cmnd[4] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0; | |
1184 | SCpnt->cmnd[5] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0; | |
1185 | SCpnt->cmnd[6] = (unsigned char) (block >> 24) & 0xff; | |
1186 | SCpnt->cmnd[7] = (unsigned char) (block >> 16) & 0xff; | |
1187 | SCpnt->cmnd[8] = (unsigned char) (block >> 8) & 0xff; | |
1188 | SCpnt->cmnd[9] = (unsigned char) block & 0xff; | |
1189 | SCpnt->cmnd[10] = (unsigned char) (this_count >> 24) & 0xff; | |
1190 | SCpnt->cmnd[11] = (unsigned char) (this_count >> 16) & 0xff; | |
1191 | SCpnt->cmnd[12] = (unsigned char) (this_count >> 8) & 0xff; | |
1192 | SCpnt->cmnd[13] = (unsigned char) this_count & 0xff; | |
1193 | SCpnt->cmnd[14] = SCpnt->cmnd[15] = 0; | |
1194 | } else if ((this_count > 0xff) || (block > 0x1fffff) || | |
1195 | scsi_device_protection(SCpnt->device) || | |
1196 | SCpnt->device->use_10_for_rw) { | |
1197 | SCpnt->cmnd[0] += READ_10 - READ_6; | |
1198 | SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); | |
1199 | SCpnt->cmnd[2] = (unsigned char) (block >> 24) & 0xff; | |
1200 | SCpnt->cmnd[3] = (unsigned char) (block >> 16) & 0xff; | |
1201 | SCpnt->cmnd[4] = (unsigned char) (block >> 8) & 0xff; | |
1202 | SCpnt->cmnd[5] = (unsigned char) block & 0xff; | |
1203 | SCpnt->cmnd[6] = SCpnt->cmnd[9] = 0; | |
1204 | SCpnt->cmnd[7] = (unsigned char) (this_count >> 8) & 0xff; | |
1205 | SCpnt->cmnd[8] = (unsigned char) this_count & 0xff; | |
1206 | } else { | |
1207 | if (unlikely(rq->cmd_flags & REQ_FUA)) { | |
1208 | /* | |
1209 | * This happens only if this drive failed | |
1210 | * 10byte rw command with ILLEGAL_REQUEST | |
1211 | * during operation and thus turned off | |
1212 | * use_10_for_rw. | |
1213 | */ | |
1214 | scmd_printk(KERN_ERR, SCpnt, | |
1215 | "FUA write on READ/WRITE(6) drive\n"); | |
1216 | goto out; | |
1217 | } | |
1218 | ||
1219 | SCpnt->cmnd[1] |= (unsigned char) ((block >> 16) & 0x1f); | |
1220 | SCpnt->cmnd[2] = (unsigned char) ((block >> 8) & 0xff); | |
1221 | SCpnt->cmnd[3] = (unsigned char) block & 0xff; | |
1222 | SCpnt->cmnd[4] = (unsigned char) this_count; | |
1223 | SCpnt->cmnd[5] = 0; | |
1224 | } | |
1225 | SCpnt->sdb.length = this_count * sdp->sector_size; | |
1226 | ||
1227 | /* | |
1228 | * We shouldn't disconnect in the middle of a sector, so with a dumb | |
1229 | * host adapter, it's safe to assume that we can at least transfer | |
1230 | * this many bytes between each connect / disconnect. | |
1231 | */ | |
1232 | SCpnt->transfersize = sdp->sector_size; | |
1233 | SCpnt->underflow = this_count << 9; | |
1234 | SCpnt->allowed = SD_MAX_RETRIES; | |
1235 | ||
1236 | /* | |
1237 | * This indicates that the command is ready from our end to be | |
1238 | * queued. | |
1239 | */ | |
1240 | ret = BLKPREP_OK; | |
1241 | out: | |
1242 | if (zoned_write && ret != BLKPREP_OK) | |
1243 | sd_zbc_write_unlock_zone(SCpnt); | |
1244 | ||
1245 | return ret; | |
1246 | } | |
1247 | ||
1248 | static int sd_init_command(struct scsi_cmnd *cmd) | |
1249 | { | |
1250 | struct request *rq = cmd->request; | |
1251 | ||
1252 | switch (req_op(rq)) { | |
1253 | case REQ_OP_DISCARD: | |
1254 | switch (scsi_disk(rq->rq_disk)->provisioning_mode) { | |
1255 | case SD_LBP_UNMAP: | |
1256 | return sd_setup_unmap_cmnd(cmd); | |
1257 | case SD_LBP_WS16: | |
1258 | return sd_setup_write_same16_cmnd(cmd, true); | |
1259 | case SD_LBP_WS10: | |
1260 | return sd_setup_write_same10_cmnd(cmd, true); | |
1261 | case SD_LBP_ZERO: | |
1262 | return sd_setup_write_same10_cmnd(cmd, false); | |
1263 | default: | |
1264 | return BLKPREP_INVALID; | |
1265 | } | |
1266 | case REQ_OP_WRITE_ZEROES: | |
1267 | return sd_setup_write_zeroes_cmnd(cmd); | |
1268 | case REQ_OP_WRITE_SAME: | |
1269 | return sd_setup_write_same_cmnd(cmd); | |
1270 | case REQ_OP_FLUSH: | |
1271 | return sd_setup_flush_cmnd(cmd); | |
1272 | case REQ_OP_READ: | |
1273 | case REQ_OP_WRITE: | |
1274 | return sd_setup_read_write_cmnd(cmd); | |
1275 | case REQ_OP_ZONE_REPORT: | |
1276 | return sd_zbc_setup_report_cmnd(cmd); | |
1277 | case REQ_OP_ZONE_RESET: | |
1278 | return sd_zbc_setup_reset_cmnd(cmd); | |
1279 | default: | |
1280 | BUG(); | |
1281 | } | |
1282 | } | |
1283 | ||
1284 | static void sd_uninit_command(struct scsi_cmnd *SCpnt) | |
1285 | { | |
1286 | struct request *rq = SCpnt->request; | |
1287 | ||
1288 | if (SCpnt->flags & SCMD_ZONE_WRITE_LOCK) | |
1289 | sd_zbc_write_unlock_zone(SCpnt); | |
1290 | ||
1291 | if (rq->rq_flags & RQF_SPECIAL_PAYLOAD) | |
1292 | __free_page(rq->special_vec.bv_page); | |
1293 | ||
1294 | if (SCpnt->cmnd != scsi_req(rq)->cmd) { | |
1295 | mempool_free(SCpnt->cmnd, sd_cdb_pool); | |
1296 | SCpnt->cmnd = NULL; | |
1297 | SCpnt->cmd_len = 0; | |
1298 | } | |
1299 | } | |
1300 | ||
1301 | /** | |
1302 | * sd_open - open a scsi disk device | |
1303 | * @bdev: Block device of the scsi disk to open | |
1304 | * @mode: FMODE_* mask | |
1305 | * | |
1306 | * Returns 0 if successful. Returns a negated errno value in case | |
1307 | * of error. | |
1308 | * | |
1309 | * Note: This can be called from a user context (e.g. fsck(1) ) | |
1310 | * or from within the kernel (e.g. as a result of a mount(1) ). | |
1311 | * In the latter case @inode and @filp carry an abridged amount | |
1312 | * of information as noted above. | |
1313 | * | |
1314 | * Locking: called with bdev->bd_mutex held. | |
1315 | **/ | |
1316 | static int sd_open(struct block_device *bdev, fmode_t mode) | |
1317 | { | |
1318 | struct scsi_disk *sdkp = scsi_disk_get(bdev->bd_disk); | |
1319 | struct scsi_device *sdev; | |
1320 | int retval; | |
1321 | ||
1322 | if (!sdkp) | |
1323 | return -ENXIO; | |
1324 | ||
1325 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_open\n")); | |
1326 | ||
1327 | sdev = sdkp->device; | |
1328 | ||
1329 | /* | |
1330 | * If the device is in error recovery, wait until it is done. | |
1331 | * If the device is offline, then disallow any access to it. | |
1332 | */ | |
1333 | retval = -ENXIO; | |
1334 | if (!scsi_block_when_processing_errors(sdev)) | |
1335 | goto error_out; | |
1336 | ||
1337 | if (sdev->removable || sdkp->write_prot) | |
1338 | check_disk_change(bdev); | |
1339 | ||
1340 | /* | |
1341 | * If the drive is empty, just let the open fail. | |
1342 | */ | |
1343 | retval = -ENOMEDIUM; | |
1344 | if (sdev->removable && !sdkp->media_present && !(mode & FMODE_NDELAY)) | |
1345 | goto error_out; | |
1346 | ||
1347 | /* | |
1348 | * If the device has the write protect tab set, have the open fail | |
1349 | * if the user expects to be able to write to the thing. | |
1350 | */ | |
1351 | retval = -EROFS; | |
1352 | if (sdkp->write_prot && (mode & FMODE_WRITE)) | |
1353 | goto error_out; | |
1354 | ||
1355 | /* | |
1356 | * It is possible that the disk changing stuff resulted in | |
1357 | * the device being taken offline. If this is the case, | |
1358 | * report this to the user, and don't pretend that the | |
1359 | * open actually succeeded. | |
1360 | */ | |
1361 | retval = -ENXIO; | |
1362 | if (!scsi_device_online(sdev)) | |
1363 | goto error_out; | |
1364 | ||
1365 | if ((atomic_inc_return(&sdkp->openers) == 1) && sdev->removable) { | |
1366 | if (scsi_block_when_processing_errors(sdev)) | |
1367 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT); | |
1368 | } | |
1369 | ||
1370 | return 0; | |
1371 | ||
1372 | error_out: | |
1373 | scsi_disk_put(sdkp); | |
1374 | return retval; | |
1375 | } | |
1376 | ||
1377 | /** | |
1378 | * sd_release - invoked when the (last) close(2) is called on this | |
1379 | * scsi disk. | |
1380 | * @disk: disk to release | |
1381 | * @mode: FMODE_* mask | |
1382 | * | |
1383 | * Returns 0. | |
1384 | * | |
1385 | * Note: may block (uninterruptible) if error recovery is underway | |
1386 | * on this disk. | |
1387 | * | |
1388 | * Locking: called with bdev->bd_mutex held. | |
1389 | **/ | |
1390 | static void sd_release(struct gendisk *disk, fmode_t mode) | |
1391 | { | |
1392 | struct scsi_disk *sdkp = scsi_disk(disk); | |
1393 | struct scsi_device *sdev = sdkp->device; | |
1394 | ||
1395 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_release\n")); | |
1396 | ||
1397 | if (atomic_dec_return(&sdkp->openers) == 0 && sdev->removable) { | |
1398 | if (scsi_block_when_processing_errors(sdev)) | |
1399 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW); | |
1400 | } | |
1401 | ||
1402 | /* | |
1403 | * XXX and what if there are packets in flight and this close() | |
1404 | * XXX is followed by a "rmmod sd_mod"? | |
1405 | */ | |
1406 | ||
1407 | scsi_disk_put(sdkp); | |
1408 | } | |
1409 | ||
1410 | static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo) | |
1411 | { | |
1412 | struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk); | |
1413 | struct scsi_device *sdp = sdkp->device; | |
1414 | struct Scsi_Host *host = sdp->host; | |
1415 | sector_t capacity = logical_to_sectors(sdp, sdkp->capacity); | |
1416 | int diskinfo[4]; | |
1417 | ||
1418 | /* default to most commonly used values */ | |
1419 | diskinfo[0] = 0x40; /* 1 << 6 */ | |
1420 | diskinfo[1] = 0x20; /* 1 << 5 */ | |
1421 | diskinfo[2] = capacity >> 11; | |
1422 | ||
1423 | /* override with calculated, extended default, or driver values */ | |
1424 | if (host->hostt->bios_param) | |
1425 | host->hostt->bios_param(sdp, bdev, capacity, diskinfo); | |
1426 | else | |
1427 | scsicam_bios_param(bdev, capacity, diskinfo); | |
1428 | ||
1429 | geo->heads = diskinfo[0]; | |
1430 | geo->sectors = diskinfo[1]; | |
1431 | geo->cylinders = diskinfo[2]; | |
1432 | return 0; | |
1433 | } | |
1434 | ||
1435 | /** | |
1436 | * sd_ioctl - process an ioctl | |
1437 | * @bdev: target block device | |
1438 | * @mode: FMODE_* mask | |
1439 | * @cmd: ioctl command number | |
1440 | * @arg: this is third argument given to ioctl(2) system call. | |
1441 | * Often contains a pointer. | |
1442 | * | |
1443 | * Returns 0 if successful (some ioctls return positive numbers on | |
1444 | * success as well). Returns a negated errno value in case of error. | |
1445 | * | |
1446 | * Note: most ioctls are forward onto the block subsystem or further | |
1447 | * down in the scsi subsystem. | |
1448 | **/ | |
1449 | static int sd_ioctl(struct block_device *bdev, fmode_t mode, | |
1450 | unsigned int cmd, unsigned long arg) | |
1451 | { | |
1452 | struct gendisk *disk = bdev->bd_disk; | |
1453 | struct scsi_disk *sdkp = scsi_disk(disk); | |
1454 | struct scsi_device *sdp = sdkp->device; | |
1455 | void __user *p = (void __user *)arg; | |
1456 | int error; | |
1457 | ||
1458 | SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO, sdkp, "sd_ioctl: disk=%s, " | |
1459 | "cmd=0x%x\n", disk->disk_name, cmd)); | |
1460 | ||
1461 | error = scsi_verify_blk_ioctl(bdev, cmd); | |
1462 | if (error < 0) | |
1463 | return error; | |
1464 | ||
1465 | /* | |
1466 | * If we are in the middle of error recovery, don't let anyone | |
1467 | * else try and use this device. Also, if error recovery fails, it | |
1468 | * may try and take the device offline, in which case all further | |
1469 | * access to the device is prohibited. | |
1470 | */ | |
1471 | error = scsi_ioctl_block_when_processing_errors(sdp, cmd, | |
1472 | (mode & FMODE_NDELAY) != 0); | |
1473 | if (error) | |
1474 | goto out; | |
1475 | ||
1476 | if (is_sed_ioctl(cmd)) | |
1477 | return sed_ioctl(sdkp->opal_dev, cmd, p); | |
1478 | ||
1479 | /* | |
1480 | * Send SCSI addressing ioctls directly to mid level, send other | |
1481 | * ioctls to block level and then onto mid level if they can't be | |
1482 | * resolved. | |
1483 | */ | |
1484 | switch (cmd) { | |
1485 | case SCSI_IOCTL_GET_IDLUN: | |
1486 | case SCSI_IOCTL_GET_BUS_NUMBER: | |
1487 | error = scsi_ioctl(sdp, cmd, p); | |
1488 | break; | |
1489 | default: | |
1490 | error = scsi_cmd_blk_ioctl(bdev, mode, cmd, p); | |
1491 | if (error != -ENOTTY) | |
1492 | break; | |
1493 | error = scsi_ioctl(sdp, cmd, p); | |
1494 | break; | |
1495 | } | |
1496 | out: | |
1497 | return error; | |
1498 | } | |
1499 | ||
1500 | static void set_media_not_present(struct scsi_disk *sdkp) | |
1501 | { | |
1502 | if (sdkp->media_present) | |
1503 | sdkp->device->changed = 1; | |
1504 | ||
1505 | if (sdkp->device->removable) { | |
1506 | sdkp->media_present = 0; | |
1507 | sdkp->capacity = 0; | |
1508 | } | |
1509 | } | |
1510 | ||
1511 | static int media_not_present(struct scsi_disk *sdkp, | |
1512 | struct scsi_sense_hdr *sshdr) | |
1513 | { | |
1514 | if (!scsi_sense_valid(sshdr)) | |
1515 | return 0; | |
1516 | ||
1517 | /* not invoked for commands that could return deferred errors */ | |
1518 | switch (sshdr->sense_key) { | |
1519 | case UNIT_ATTENTION: | |
1520 | case NOT_READY: | |
1521 | /* medium not present */ | |
1522 | if (sshdr->asc == 0x3A) { | |
1523 | set_media_not_present(sdkp); | |
1524 | return 1; | |
1525 | } | |
1526 | } | |
1527 | return 0; | |
1528 | } | |
1529 | ||
1530 | /** | |
1531 | * sd_check_events - check media events | |
1532 | * @disk: kernel device descriptor | |
1533 | * @clearing: disk events currently being cleared | |
1534 | * | |
1535 | * Returns mask of DISK_EVENT_*. | |
1536 | * | |
1537 | * Note: this function is invoked from the block subsystem. | |
1538 | **/ | |
1539 | static unsigned int sd_check_events(struct gendisk *disk, unsigned int clearing) | |
1540 | { | |
1541 | struct scsi_disk *sdkp = scsi_disk_get(disk); | |
1542 | struct scsi_device *sdp; | |
1543 | int retval; | |
1544 | ||
1545 | if (!sdkp) | |
1546 | return 0; | |
1547 | ||
1548 | sdp = sdkp->device; | |
1549 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_check_events\n")); | |
1550 | ||
1551 | /* | |
1552 | * If the device is offline, don't send any commands - just pretend as | |
1553 | * if the command failed. If the device ever comes back online, we | |
1554 | * can deal with it then. It is only because of unrecoverable errors | |
1555 | * that we would ever take a device offline in the first place. | |
1556 | */ | |
1557 | if (!scsi_device_online(sdp)) { | |
1558 | set_media_not_present(sdkp); | |
1559 | goto out; | |
1560 | } | |
1561 | ||
1562 | /* | |
1563 | * Using TEST_UNIT_READY enables differentiation between drive with | |
1564 | * no cartridge loaded - NOT READY, drive with changed cartridge - | |
1565 | * UNIT ATTENTION, or with same cartridge - GOOD STATUS. | |
1566 | * | |
1567 | * Drives that auto spin down. eg iomega jaz 1G, will be started | |
1568 | * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever | |
1569 | * sd_revalidate() is called. | |
1570 | */ | |
1571 | if (scsi_block_when_processing_errors(sdp)) { | |
1572 | struct scsi_sense_hdr sshdr = { 0, }; | |
1573 | ||
1574 | retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, SD_MAX_RETRIES, | |
1575 | &sshdr); | |
1576 | ||
1577 | /* failed to execute TUR, assume media not present */ | |
1578 | if (host_byte(retval)) { | |
1579 | set_media_not_present(sdkp); | |
1580 | goto out; | |
1581 | } | |
1582 | ||
1583 | if (media_not_present(sdkp, &sshdr)) | |
1584 | goto out; | |
1585 | } | |
1586 | ||
1587 | /* | |
1588 | * For removable scsi disk we have to recognise the presence | |
1589 | * of a disk in the drive. | |
1590 | */ | |
1591 | if (!sdkp->media_present) | |
1592 | sdp->changed = 1; | |
1593 | sdkp->media_present = 1; | |
1594 | out: | |
1595 | /* | |
1596 | * sdp->changed is set under the following conditions: | |
1597 | * | |
1598 | * Medium present state has changed in either direction. | |
1599 | * Device has indicated UNIT_ATTENTION. | |
1600 | */ | |
1601 | retval = sdp->changed ? DISK_EVENT_MEDIA_CHANGE : 0; | |
1602 | sdp->changed = 0; | |
1603 | scsi_disk_put(sdkp); | |
1604 | return retval; | |
1605 | } | |
1606 | ||
1607 | static int sd_sync_cache(struct scsi_disk *sdkp, struct scsi_sense_hdr *sshdr) | |
1608 | { | |
1609 | int retries, res; | |
1610 | struct scsi_device *sdp = sdkp->device; | |
1611 | const int timeout = sdp->request_queue->rq_timeout | |
1612 | * SD_FLUSH_TIMEOUT_MULTIPLIER; | |
1613 | struct scsi_sense_hdr my_sshdr; | |
1614 | ||
1615 | if (!scsi_device_online(sdp)) | |
1616 | return -ENODEV; | |
1617 | ||
1618 | /* caller might not be interested in sense, but we need it */ | |
1619 | if (!sshdr) | |
1620 | sshdr = &my_sshdr; | |
1621 | ||
1622 | for (retries = 3; retries > 0; --retries) { | |
1623 | unsigned char cmd[10] = { 0 }; | |
1624 | ||
1625 | cmd[0] = SYNCHRONIZE_CACHE; | |
1626 | /* | |
1627 | * Leave the rest of the command zero to indicate | |
1628 | * flush everything. | |
1629 | */ | |
1630 | res = scsi_execute(sdp, cmd, DMA_NONE, NULL, 0, NULL, sshdr, | |
1631 | timeout, SD_MAX_RETRIES, 0, RQF_PM, NULL); | |
1632 | if (res == 0) | |
1633 | break; | |
1634 | } | |
1635 | ||
1636 | if (res) { | |
1637 | sd_print_result(sdkp, "Synchronize Cache(10) failed", res); | |
1638 | ||
1639 | if (driver_byte(res) & DRIVER_SENSE) | |
1640 | sd_print_sense_hdr(sdkp, sshdr); | |
1641 | ||
1642 | /* we need to evaluate the error return */ | |
1643 | if (scsi_sense_valid(sshdr) && | |
1644 | (sshdr->asc == 0x3a || /* medium not present */ | |
1645 | sshdr->asc == 0x20)) /* invalid command */ | |
1646 | /* this is no error here */ | |
1647 | return 0; | |
1648 | ||
1649 | switch (host_byte(res)) { | |
1650 | /* ignore errors due to racing a disconnection */ | |
1651 | case DID_BAD_TARGET: | |
1652 | case DID_NO_CONNECT: | |
1653 | return 0; | |
1654 | /* signal the upper layer it might try again */ | |
1655 | case DID_BUS_BUSY: | |
1656 | case DID_IMM_RETRY: | |
1657 | case DID_REQUEUE: | |
1658 | case DID_SOFT_ERROR: | |
1659 | return -EBUSY; | |
1660 | default: | |
1661 | return -EIO; | |
1662 | } | |
1663 | } | |
1664 | return 0; | |
1665 | } | |
1666 | ||
1667 | static void sd_rescan(struct device *dev) | |
1668 | { | |
1669 | struct scsi_disk *sdkp = dev_get_drvdata(dev); | |
1670 | ||
1671 | revalidate_disk(sdkp->disk); | |
1672 | } | |
1673 | ||
1674 | ||
1675 | #ifdef CONFIG_COMPAT | |
1676 | /* | |
1677 | * This gets directly called from VFS. When the ioctl | |
1678 | * is not recognized we go back to the other translation paths. | |
1679 | */ | |
1680 | static int sd_compat_ioctl(struct block_device *bdev, fmode_t mode, | |
1681 | unsigned int cmd, unsigned long arg) | |
1682 | { | |
1683 | struct scsi_device *sdev = scsi_disk(bdev->bd_disk)->device; | |
1684 | int error; | |
1685 | ||
1686 | error = scsi_ioctl_block_when_processing_errors(sdev, cmd, | |
1687 | (mode & FMODE_NDELAY) != 0); | |
1688 | if (error) | |
1689 | return error; | |
1690 | ||
1691 | /* | |
1692 | * Let the static ioctl translation table take care of it. | |
1693 | */ | |
1694 | if (!sdev->host->hostt->compat_ioctl) | |
1695 | return -ENOIOCTLCMD; | |
1696 | return sdev->host->hostt->compat_ioctl(sdev, cmd, (void __user *)arg); | |
1697 | } | |
1698 | #endif | |
1699 | ||
1700 | static char sd_pr_type(enum pr_type type) | |
1701 | { | |
1702 | switch (type) { | |
1703 | case PR_WRITE_EXCLUSIVE: | |
1704 | return 0x01; | |
1705 | case PR_EXCLUSIVE_ACCESS: | |
1706 | return 0x03; | |
1707 | case PR_WRITE_EXCLUSIVE_REG_ONLY: | |
1708 | return 0x05; | |
1709 | case PR_EXCLUSIVE_ACCESS_REG_ONLY: | |
1710 | return 0x06; | |
1711 | case PR_WRITE_EXCLUSIVE_ALL_REGS: | |
1712 | return 0x07; | |
1713 | case PR_EXCLUSIVE_ACCESS_ALL_REGS: | |
1714 | return 0x08; | |
1715 | default: | |
1716 | return 0; | |
1717 | } | |
1718 | }; | |
1719 | ||
1720 | static int sd_pr_command(struct block_device *bdev, u8 sa, | |
1721 | u64 key, u64 sa_key, u8 type, u8 flags) | |
1722 | { | |
1723 | struct scsi_device *sdev = scsi_disk(bdev->bd_disk)->device; | |
1724 | struct scsi_sense_hdr sshdr; | |
1725 | int result; | |
1726 | u8 cmd[16] = { 0, }; | |
1727 | u8 data[24] = { 0, }; | |
1728 | ||
1729 | cmd[0] = PERSISTENT_RESERVE_OUT; | |
1730 | cmd[1] = sa; | |
1731 | cmd[2] = type; | |
1732 | put_unaligned_be32(sizeof(data), &cmd[5]); | |
1733 | ||
1734 | put_unaligned_be64(key, &data[0]); | |
1735 | put_unaligned_be64(sa_key, &data[8]); | |
1736 | data[20] = flags; | |
1737 | ||
1738 | result = scsi_execute_req(sdev, cmd, DMA_TO_DEVICE, &data, sizeof(data), | |
1739 | &sshdr, SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
1740 | ||
1741 | if ((driver_byte(result) & DRIVER_SENSE) && | |
1742 | (scsi_sense_valid(&sshdr))) { | |
1743 | sdev_printk(KERN_INFO, sdev, "PR command failed: %d\n", result); | |
1744 | scsi_print_sense_hdr(sdev, NULL, &sshdr); | |
1745 | } | |
1746 | ||
1747 | return result; | |
1748 | } | |
1749 | ||
1750 | static int sd_pr_register(struct block_device *bdev, u64 old_key, u64 new_key, | |
1751 | u32 flags) | |
1752 | { | |
1753 | if (flags & ~PR_FL_IGNORE_KEY) | |
1754 | return -EOPNOTSUPP; | |
1755 | return sd_pr_command(bdev, (flags & PR_FL_IGNORE_KEY) ? 0x06 : 0x00, | |
1756 | old_key, new_key, 0, | |
1757 | (1 << 0) /* APTPL */); | |
1758 | } | |
1759 | ||
1760 | static int sd_pr_reserve(struct block_device *bdev, u64 key, enum pr_type type, | |
1761 | u32 flags) | |
1762 | { | |
1763 | if (flags) | |
1764 | return -EOPNOTSUPP; | |
1765 | return sd_pr_command(bdev, 0x01, key, 0, sd_pr_type(type), 0); | |
1766 | } | |
1767 | ||
1768 | static int sd_pr_release(struct block_device *bdev, u64 key, enum pr_type type) | |
1769 | { | |
1770 | return sd_pr_command(bdev, 0x02, key, 0, sd_pr_type(type), 0); | |
1771 | } | |
1772 | ||
1773 | static int sd_pr_preempt(struct block_device *bdev, u64 old_key, u64 new_key, | |
1774 | enum pr_type type, bool abort) | |
1775 | { | |
1776 | return sd_pr_command(bdev, abort ? 0x05 : 0x04, old_key, new_key, | |
1777 | sd_pr_type(type), 0); | |
1778 | } | |
1779 | ||
1780 | static int sd_pr_clear(struct block_device *bdev, u64 key) | |
1781 | { | |
1782 | return sd_pr_command(bdev, 0x03, key, 0, 0, 0); | |
1783 | } | |
1784 | ||
1785 | static const struct pr_ops sd_pr_ops = { | |
1786 | .pr_register = sd_pr_register, | |
1787 | .pr_reserve = sd_pr_reserve, | |
1788 | .pr_release = sd_pr_release, | |
1789 | .pr_preempt = sd_pr_preempt, | |
1790 | .pr_clear = sd_pr_clear, | |
1791 | }; | |
1792 | ||
1793 | static const struct block_device_operations sd_fops = { | |
1794 | .owner = THIS_MODULE, | |
1795 | .open = sd_open, | |
1796 | .release = sd_release, | |
1797 | .ioctl = sd_ioctl, | |
1798 | .getgeo = sd_getgeo, | |
1799 | #ifdef CONFIG_COMPAT | |
1800 | .compat_ioctl = sd_compat_ioctl, | |
1801 | #endif | |
1802 | .check_events = sd_check_events, | |
1803 | .revalidate_disk = sd_revalidate_disk, | |
1804 | .unlock_native_capacity = sd_unlock_native_capacity, | |
1805 | .pr_ops = &sd_pr_ops, | |
1806 | }; | |
1807 | ||
1808 | /** | |
1809 | * sd_eh_reset - reset error handling callback | |
1810 | * @scmd: sd-issued command that has failed | |
1811 | * | |
1812 | * This function is called by the SCSI midlayer before starting | |
1813 | * SCSI EH. When counting medium access failures we have to be | |
1814 | * careful to register it only only once per device and SCSI EH run; | |
1815 | * there might be several timed out commands which will cause the | |
1816 | * 'max_medium_access_timeouts' counter to trigger after the first | |
1817 | * SCSI EH run already and set the device to offline. | |
1818 | * So this function resets the internal counter before starting SCSI EH. | |
1819 | **/ | |
1820 | static void sd_eh_reset(struct scsi_cmnd *scmd) | |
1821 | { | |
1822 | struct scsi_disk *sdkp = scsi_disk(scmd->request->rq_disk); | |
1823 | ||
1824 | /* New SCSI EH run, reset gate variable */ | |
1825 | sdkp->ignore_medium_access_errors = false; | |
1826 | } | |
1827 | ||
1828 | /** | |
1829 | * sd_eh_action - error handling callback | |
1830 | * @scmd: sd-issued command that has failed | |
1831 | * @eh_disp: The recovery disposition suggested by the midlayer | |
1832 | * | |
1833 | * This function is called by the SCSI midlayer upon completion of an | |
1834 | * error test command (currently TEST UNIT READY). The result of sending | |
1835 | * the eh command is passed in eh_disp. We're looking for devices that | |
1836 | * fail medium access commands but are OK with non access commands like | |
1837 | * test unit ready (so wrongly see the device as having a successful | |
1838 | * recovery) | |
1839 | **/ | |
1840 | static int sd_eh_action(struct scsi_cmnd *scmd, int eh_disp) | |
1841 | { | |
1842 | struct scsi_disk *sdkp = scsi_disk(scmd->request->rq_disk); | |
1843 | struct scsi_device *sdev = scmd->device; | |
1844 | ||
1845 | if (!scsi_device_online(sdev) || | |
1846 | !scsi_medium_access_command(scmd) || | |
1847 | host_byte(scmd->result) != DID_TIME_OUT || | |
1848 | eh_disp != SUCCESS) | |
1849 | return eh_disp; | |
1850 | ||
1851 | /* | |
1852 | * The device has timed out executing a medium access command. | |
1853 | * However, the TEST UNIT READY command sent during error | |
1854 | * handling completed successfully. Either the device is in the | |
1855 | * process of recovering or has it suffered an internal failure | |
1856 | * that prevents access to the storage medium. | |
1857 | */ | |
1858 | if (!sdkp->ignore_medium_access_errors) { | |
1859 | sdkp->medium_access_timed_out++; | |
1860 | sdkp->ignore_medium_access_errors = true; | |
1861 | } | |
1862 | ||
1863 | /* | |
1864 | * If the device keeps failing read/write commands but TEST UNIT | |
1865 | * READY always completes successfully we assume that medium | |
1866 | * access is no longer possible and take the device offline. | |
1867 | */ | |
1868 | if (sdkp->medium_access_timed_out >= sdkp->max_medium_access_timeouts) { | |
1869 | scmd_printk(KERN_ERR, scmd, | |
1870 | "Medium access timeout failure. Offlining disk!\n"); | |
1871 | mutex_lock(&sdev->state_mutex); | |
1872 | scsi_device_set_state(sdev, SDEV_OFFLINE); | |
1873 | mutex_unlock(&sdev->state_mutex); | |
1874 | ||
1875 | return SUCCESS; | |
1876 | } | |
1877 | ||
1878 | return eh_disp; | |
1879 | } | |
1880 | ||
1881 | static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd) | |
1882 | { | |
1883 | struct request *req = scmd->request; | |
1884 | struct scsi_device *sdev = scmd->device; | |
1885 | unsigned int transferred, good_bytes; | |
1886 | u64 start_lba, end_lba, bad_lba; | |
1887 | ||
1888 | /* | |
1889 | * Some commands have a payload smaller than the device logical | |
1890 | * block size (e.g. INQUIRY on a 4K disk). | |
1891 | */ | |
1892 | if (scsi_bufflen(scmd) <= sdev->sector_size) | |
1893 | return 0; | |
1894 | ||
1895 | /* Check if we have a 'bad_lba' information */ | |
1896 | if (!scsi_get_sense_info_fld(scmd->sense_buffer, | |
1897 | SCSI_SENSE_BUFFERSIZE, | |
1898 | &bad_lba)) | |
1899 | return 0; | |
1900 | ||
1901 | /* | |
1902 | * If the bad lba was reported incorrectly, we have no idea where | |
1903 | * the error is. | |
1904 | */ | |
1905 | start_lba = sectors_to_logical(sdev, blk_rq_pos(req)); | |
1906 | end_lba = start_lba + bytes_to_logical(sdev, scsi_bufflen(scmd)); | |
1907 | if (bad_lba < start_lba || bad_lba >= end_lba) | |
1908 | return 0; | |
1909 | ||
1910 | /* | |
1911 | * resid is optional but mostly filled in. When it's unused, | |
1912 | * its value is zero, so we assume the whole buffer transferred | |
1913 | */ | |
1914 | transferred = scsi_bufflen(scmd) - scsi_get_resid(scmd); | |
1915 | ||
1916 | /* This computation should always be done in terms of the | |
1917 | * resolution of the device's medium. | |
1918 | */ | |
1919 | good_bytes = logical_to_bytes(sdev, bad_lba - start_lba); | |
1920 | ||
1921 | return min(good_bytes, transferred); | |
1922 | } | |
1923 | ||
1924 | /** | |
1925 | * sd_done - bottom half handler: called when the lower level | |
1926 | * driver has completed (successfully or otherwise) a scsi command. | |
1927 | * @SCpnt: mid-level's per command structure. | |
1928 | * | |
1929 | * Note: potentially run from within an ISR. Must not block. | |
1930 | **/ | |
1931 | static int sd_done(struct scsi_cmnd *SCpnt) | |
1932 | { | |
1933 | int result = SCpnt->result; | |
1934 | unsigned int good_bytes = result ? 0 : scsi_bufflen(SCpnt); | |
1935 | unsigned int sector_size = SCpnt->device->sector_size; | |
1936 | unsigned int resid; | |
1937 | struct scsi_sense_hdr sshdr; | |
1938 | struct scsi_disk *sdkp = scsi_disk(SCpnt->request->rq_disk); | |
1939 | struct request *req = SCpnt->request; | |
1940 | int sense_valid = 0; | |
1941 | int sense_deferred = 0; | |
1942 | ||
1943 | switch (req_op(req)) { | |
1944 | case REQ_OP_DISCARD: | |
1945 | case REQ_OP_WRITE_ZEROES: | |
1946 | case REQ_OP_WRITE_SAME: | |
1947 | case REQ_OP_ZONE_RESET: | |
1948 | if (!result) { | |
1949 | good_bytes = blk_rq_bytes(req); | |
1950 | scsi_set_resid(SCpnt, 0); | |
1951 | } else { | |
1952 | good_bytes = 0; | |
1953 | scsi_set_resid(SCpnt, blk_rq_bytes(req)); | |
1954 | } | |
1955 | break; | |
1956 | case REQ_OP_ZONE_REPORT: | |
1957 | if (!result) { | |
1958 | good_bytes = scsi_bufflen(SCpnt) | |
1959 | - scsi_get_resid(SCpnt); | |
1960 | scsi_set_resid(SCpnt, 0); | |
1961 | } else { | |
1962 | good_bytes = 0; | |
1963 | scsi_set_resid(SCpnt, blk_rq_bytes(req)); | |
1964 | } | |
1965 | break; | |
1966 | default: | |
1967 | /* | |
1968 | * In case of bogus fw or device, we could end up having | |
1969 | * an unaligned partial completion. Check this here and force | |
1970 | * alignment. | |
1971 | */ | |
1972 | resid = scsi_get_resid(SCpnt); | |
1973 | if (resid & (sector_size - 1)) { | |
1974 | sd_printk(KERN_INFO, sdkp, | |
1975 | "Unaligned partial completion (resid=%u, sector_sz=%u)\n", | |
1976 | resid, sector_size); | |
1977 | resid = min(scsi_bufflen(SCpnt), | |
1978 | round_up(resid, sector_size)); | |
1979 | scsi_set_resid(SCpnt, resid); | |
1980 | } | |
1981 | } | |
1982 | ||
1983 | if (result) { | |
1984 | sense_valid = scsi_command_normalize_sense(SCpnt, &sshdr); | |
1985 | if (sense_valid) | |
1986 | sense_deferred = scsi_sense_is_deferred(&sshdr); | |
1987 | } | |
1988 | sdkp->medium_access_timed_out = 0; | |
1989 | ||
1990 | if (driver_byte(result) != DRIVER_SENSE && | |
1991 | (!sense_valid || sense_deferred)) | |
1992 | goto out; | |
1993 | ||
1994 | switch (sshdr.sense_key) { | |
1995 | case HARDWARE_ERROR: | |
1996 | case MEDIUM_ERROR: | |
1997 | good_bytes = sd_completed_bytes(SCpnt); | |
1998 | break; | |
1999 | case RECOVERED_ERROR: | |
2000 | good_bytes = scsi_bufflen(SCpnt); | |
2001 | break; | |
2002 | case NO_SENSE: | |
2003 | /* This indicates a false check condition, so ignore it. An | |
2004 | * unknown amount of data was transferred so treat it as an | |
2005 | * error. | |
2006 | */ | |
2007 | SCpnt->result = 0; | |
2008 | memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); | |
2009 | break; | |
2010 | case ABORTED_COMMAND: | |
2011 | if (sshdr.asc == 0x10) /* DIF: Target detected corruption */ | |
2012 | good_bytes = sd_completed_bytes(SCpnt); | |
2013 | break; | |
2014 | case ILLEGAL_REQUEST: | |
2015 | switch (sshdr.asc) { | |
2016 | case 0x10: /* DIX: Host detected corruption */ | |
2017 | good_bytes = sd_completed_bytes(SCpnt); | |
2018 | break; | |
2019 | case 0x20: /* INVALID COMMAND OPCODE */ | |
2020 | case 0x24: /* INVALID FIELD IN CDB */ | |
2021 | switch (SCpnt->cmnd[0]) { | |
2022 | case UNMAP: | |
2023 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
2024 | break; | |
2025 | case WRITE_SAME_16: | |
2026 | case WRITE_SAME: | |
2027 | if (SCpnt->cmnd[1] & 8) { /* UNMAP */ | |
2028 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
2029 | } else { | |
2030 | sdkp->device->no_write_same = 1; | |
2031 | sd_config_write_same(sdkp); | |
2032 | req->__data_len = blk_rq_bytes(req); | |
2033 | req->rq_flags |= RQF_QUIET; | |
2034 | } | |
2035 | break; | |
2036 | } | |
2037 | } | |
2038 | break; | |
2039 | default: | |
2040 | break; | |
2041 | } | |
2042 | ||
2043 | out: | |
2044 | if (sd_is_zoned(sdkp)) | |
2045 | sd_zbc_complete(SCpnt, good_bytes, &sshdr); | |
2046 | ||
2047 | SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO, SCpnt, | |
2048 | "sd_done: completed %d of %d bytes\n", | |
2049 | good_bytes, scsi_bufflen(SCpnt))); | |
2050 | ||
2051 | if (rq_data_dir(SCpnt->request) == READ && scsi_prot_sg_count(SCpnt)) | |
2052 | sd_dif_complete(SCpnt, good_bytes); | |
2053 | ||
2054 | return good_bytes; | |
2055 | } | |
2056 | ||
2057 | /* | |
2058 | * spinup disk - called only in sd_revalidate_disk() | |
2059 | */ | |
2060 | static void | |
2061 | sd_spinup_disk(struct scsi_disk *sdkp) | |
2062 | { | |
2063 | unsigned char cmd[10]; | |
2064 | unsigned long spintime_expire = 0; | |
2065 | int retries, spintime; | |
2066 | unsigned int the_result; | |
2067 | struct scsi_sense_hdr sshdr; | |
2068 | int sense_valid = 0; | |
2069 | ||
2070 | spintime = 0; | |
2071 | ||
2072 | /* Spin up drives, as required. Only do this at boot time */ | |
2073 | /* Spinup needs to be done for module loads too. */ | |
2074 | do { | |
2075 | retries = 0; | |
2076 | ||
2077 | do { | |
2078 | cmd[0] = TEST_UNIT_READY; | |
2079 | memset((void *) &cmd[1], 0, 9); | |
2080 | ||
2081 | the_result = scsi_execute_req(sdkp->device, cmd, | |
2082 | DMA_NONE, NULL, 0, | |
2083 | &sshdr, SD_TIMEOUT, | |
2084 | SD_MAX_RETRIES, NULL); | |
2085 | ||
2086 | /* | |
2087 | * If the drive has indicated to us that it | |
2088 | * doesn't have any media in it, don't bother | |
2089 | * with any more polling. | |
2090 | */ | |
2091 | if (media_not_present(sdkp, &sshdr)) | |
2092 | return; | |
2093 | ||
2094 | if (the_result) | |
2095 | sense_valid = scsi_sense_valid(&sshdr); | |
2096 | retries++; | |
2097 | } while (retries < 3 && | |
2098 | (!scsi_status_is_good(the_result) || | |
2099 | ((driver_byte(the_result) & DRIVER_SENSE) && | |
2100 | sense_valid && sshdr.sense_key == UNIT_ATTENTION))); | |
2101 | ||
2102 | if ((driver_byte(the_result) & DRIVER_SENSE) == 0) { | |
2103 | /* no sense, TUR either succeeded or failed | |
2104 | * with a status error */ | |
2105 | if(!spintime && !scsi_status_is_good(the_result)) { | |
2106 | sd_print_result(sdkp, "Test Unit Ready failed", | |
2107 | the_result); | |
2108 | } | |
2109 | break; | |
2110 | } | |
2111 | ||
2112 | /* | |
2113 | * The device does not want the automatic start to be issued. | |
2114 | */ | |
2115 | if (sdkp->device->no_start_on_add) | |
2116 | break; | |
2117 | ||
2118 | if (sense_valid && sshdr.sense_key == NOT_READY) { | |
2119 | if (sshdr.asc == 4 && sshdr.ascq == 3) | |
2120 | break; /* manual intervention required */ | |
2121 | if (sshdr.asc == 4 && sshdr.ascq == 0xb) | |
2122 | break; /* standby */ | |
2123 | if (sshdr.asc == 4 && sshdr.ascq == 0xc) | |
2124 | break; /* unavailable */ | |
2125 | /* | |
2126 | * Issue command to spin up drive when not ready | |
2127 | */ | |
2128 | if (!spintime) { | |
2129 | sd_printk(KERN_NOTICE, sdkp, "Spinning up disk..."); | |
2130 | cmd[0] = START_STOP; | |
2131 | cmd[1] = 1; /* Return immediately */ | |
2132 | memset((void *) &cmd[2], 0, 8); | |
2133 | cmd[4] = 1; /* Start spin cycle */ | |
2134 | if (sdkp->device->start_stop_pwr_cond) | |
2135 | cmd[4] |= 1 << 4; | |
2136 | scsi_execute_req(sdkp->device, cmd, DMA_NONE, | |
2137 | NULL, 0, &sshdr, | |
2138 | SD_TIMEOUT, SD_MAX_RETRIES, | |
2139 | NULL); | |
2140 | spintime_expire = jiffies + 100 * HZ; | |
2141 | spintime = 1; | |
2142 | } | |
2143 | /* Wait 1 second for next try */ | |
2144 | msleep(1000); | |
2145 | printk("."); | |
2146 | ||
2147 | /* | |
2148 | * Wait for USB flash devices with slow firmware. | |
2149 | * Yes, this sense key/ASC combination shouldn't | |
2150 | * occur here. It's characteristic of these devices. | |
2151 | */ | |
2152 | } else if (sense_valid && | |
2153 | sshdr.sense_key == UNIT_ATTENTION && | |
2154 | sshdr.asc == 0x28) { | |
2155 | if (!spintime) { | |
2156 | spintime_expire = jiffies + 5 * HZ; | |
2157 | spintime = 1; | |
2158 | } | |
2159 | /* Wait 1 second for next try */ | |
2160 | msleep(1000); | |
2161 | } else { | |
2162 | /* we don't understand the sense code, so it's | |
2163 | * probably pointless to loop */ | |
2164 | if(!spintime) { | |
2165 | sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n"); | |
2166 | sd_print_sense_hdr(sdkp, &sshdr); | |
2167 | } | |
2168 | break; | |
2169 | } | |
2170 | ||
2171 | } while (spintime && time_before_eq(jiffies, spintime_expire)); | |
2172 | ||
2173 | if (spintime) { | |
2174 | if (scsi_status_is_good(the_result)) | |
2175 | printk("ready\n"); | |
2176 | else | |
2177 | printk("not responding...\n"); | |
2178 | } | |
2179 | } | |
2180 | ||
2181 | /* | |
2182 | * Determine whether disk supports Data Integrity Field. | |
2183 | */ | |
2184 | static int sd_read_protection_type(struct scsi_disk *sdkp, unsigned char *buffer) | |
2185 | { | |
2186 | struct scsi_device *sdp = sdkp->device; | |
2187 | u8 type; | |
2188 | int ret = 0; | |
2189 | ||
2190 | if (scsi_device_protection(sdp) == 0 || (buffer[12] & 1) == 0) | |
2191 | return ret; | |
2192 | ||
2193 | type = ((buffer[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */ | |
2194 | ||
2195 | if (type > T10_PI_TYPE3_PROTECTION) | |
2196 | ret = -ENODEV; | |
2197 | else if (scsi_host_dif_capable(sdp->host, type)) | |
2198 | ret = 1; | |
2199 | ||
2200 | if (sdkp->first_scan || type != sdkp->protection_type) | |
2201 | switch (ret) { | |
2202 | case -ENODEV: | |
2203 | sd_printk(KERN_ERR, sdkp, "formatted with unsupported" \ | |
2204 | " protection type %u. Disabling disk!\n", | |
2205 | type); | |
2206 | break; | |
2207 | case 1: | |
2208 | sd_printk(KERN_NOTICE, sdkp, | |
2209 | "Enabling DIF Type %u protection\n", type); | |
2210 | break; | |
2211 | case 0: | |
2212 | sd_printk(KERN_NOTICE, sdkp, | |
2213 | "Disabling DIF Type %u protection\n", type); | |
2214 | break; | |
2215 | } | |
2216 | ||
2217 | sdkp->protection_type = type; | |
2218 | ||
2219 | return ret; | |
2220 | } | |
2221 | ||
2222 | static void read_capacity_error(struct scsi_disk *sdkp, struct scsi_device *sdp, | |
2223 | struct scsi_sense_hdr *sshdr, int sense_valid, | |
2224 | int the_result) | |
2225 | { | |
2226 | if (driver_byte(the_result) & DRIVER_SENSE) | |
2227 | sd_print_sense_hdr(sdkp, sshdr); | |
2228 | else | |
2229 | sd_printk(KERN_NOTICE, sdkp, "Sense not available.\n"); | |
2230 | ||
2231 | /* | |
2232 | * Set dirty bit for removable devices if not ready - | |
2233 | * sometimes drives will not report this properly. | |
2234 | */ | |
2235 | if (sdp->removable && | |
2236 | sense_valid && sshdr->sense_key == NOT_READY) | |
2237 | set_media_not_present(sdkp); | |
2238 | ||
2239 | /* | |
2240 | * We used to set media_present to 0 here to indicate no media | |
2241 | * in the drive, but some drives fail read capacity even with | |
2242 | * media present, so we can't do that. | |
2243 | */ | |
2244 | sdkp->capacity = 0; /* unknown mapped to zero - as usual */ | |
2245 | } | |
2246 | ||
2247 | #define RC16_LEN 32 | |
2248 | #if RC16_LEN > SD_BUF_SIZE | |
2249 | #error RC16_LEN must not be more than SD_BUF_SIZE | |
2250 | #endif | |
2251 | ||
2252 | #define READ_CAPACITY_RETRIES_ON_RESET 10 | |
2253 | ||
2254 | /* | |
2255 | * Ensure that we don't overflow sector_t when CONFIG_LBDAF is not set | |
2256 | * and the reported logical block size is bigger than 512 bytes. Note | |
2257 | * that last_sector is a u64 and therefore logical_to_sectors() is not | |
2258 | * applicable. | |
2259 | */ | |
2260 | static bool sd_addressable_capacity(u64 lba, unsigned int sector_size) | |
2261 | { | |
2262 | u64 last_sector = (lba + 1ULL) << (ilog2(sector_size) - 9); | |
2263 | ||
2264 | if (sizeof(sector_t) == 4 && last_sector > U32_MAX) | |
2265 | return false; | |
2266 | ||
2267 | return true; | |
2268 | } | |
2269 | ||
2270 | static int read_capacity_16(struct scsi_disk *sdkp, struct scsi_device *sdp, | |
2271 | unsigned char *buffer) | |
2272 | { | |
2273 | unsigned char cmd[16]; | |
2274 | struct scsi_sense_hdr sshdr; | |
2275 | int sense_valid = 0; | |
2276 | int the_result; | |
2277 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; | |
2278 | unsigned int alignment; | |
2279 | unsigned long long lba; | |
2280 | unsigned sector_size; | |
2281 | ||
2282 | if (sdp->no_read_capacity_16) | |
2283 | return -EINVAL; | |
2284 | ||
2285 | do { | |
2286 | memset(cmd, 0, 16); | |
2287 | cmd[0] = SERVICE_ACTION_IN_16; | |
2288 | cmd[1] = SAI_READ_CAPACITY_16; | |
2289 | cmd[13] = RC16_LEN; | |
2290 | memset(buffer, 0, RC16_LEN); | |
2291 | ||
2292 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, | |
2293 | buffer, RC16_LEN, &sshdr, | |
2294 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
2295 | ||
2296 | if (media_not_present(sdkp, &sshdr)) | |
2297 | return -ENODEV; | |
2298 | ||
2299 | if (the_result) { | |
2300 | sense_valid = scsi_sense_valid(&sshdr); | |
2301 | if (sense_valid && | |
2302 | sshdr.sense_key == ILLEGAL_REQUEST && | |
2303 | (sshdr.asc == 0x20 || sshdr.asc == 0x24) && | |
2304 | sshdr.ascq == 0x00) | |
2305 | /* Invalid Command Operation Code or | |
2306 | * Invalid Field in CDB, just retry | |
2307 | * silently with RC10 */ | |
2308 | return -EINVAL; | |
2309 | if (sense_valid && | |
2310 | sshdr.sense_key == UNIT_ATTENTION && | |
2311 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) | |
2312 | /* Device reset might occur several times, | |
2313 | * give it one more chance */ | |
2314 | if (--reset_retries > 0) | |
2315 | continue; | |
2316 | } | |
2317 | retries--; | |
2318 | ||
2319 | } while (the_result && retries); | |
2320 | ||
2321 | if (the_result) { | |
2322 | sd_print_result(sdkp, "Read Capacity(16) failed", the_result); | |
2323 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); | |
2324 | return -EINVAL; | |
2325 | } | |
2326 | ||
2327 | sector_size = get_unaligned_be32(&buffer[8]); | |
2328 | lba = get_unaligned_be64(&buffer[0]); | |
2329 | ||
2330 | if (sd_read_protection_type(sdkp, buffer) < 0) { | |
2331 | sdkp->capacity = 0; | |
2332 | return -ENODEV; | |
2333 | } | |
2334 | ||
2335 | if (!sd_addressable_capacity(lba, sector_size)) { | |
2336 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a " | |
2337 | "kernel compiled with support for large block " | |
2338 | "devices.\n"); | |
2339 | sdkp->capacity = 0; | |
2340 | return -EOVERFLOW; | |
2341 | } | |
2342 | ||
2343 | /* Logical blocks per physical block exponent */ | |
2344 | sdkp->physical_block_size = (1 << (buffer[13] & 0xf)) * sector_size; | |
2345 | ||
2346 | /* RC basis */ | |
2347 | sdkp->rc_basis = (buffer[12] >> 4) & 0x3; | |
2348 | ||
2349 | /* Lowest aligned logical block */ | |
2350 | alignment = ((buffer[14] & 0x3f) << 8 | buffer[15]) * sector_size; | |
2351 | blk_queue_alignment_offset(sdp->request_queue, alignment); | |
2352 | if (alignment && sdkp->first_scan) | |
2353 | sd_printk(KERN_NOTICE, sdkp, | |
2354 | "physical block alignment offset: %u\n", alignment); | |
2355 | ||
2356 | if (buffer[14] & 0x80) { /* LBPME */ | |
2357 | sdkp->lbpme = 1; | |
2358 | ||
2359 | if (buffer[14] & 0x40) /* LBPRZ */ | |
2360 | sdkp->lbprz = 1; | |
2361 | ||
2362 | sd_config_discard(sdkp, SD_LBP_WS16); | |
2363 | } | |
2364 | ||
2365 | sdkp->capacity = lba + 1; | |
2366 | return sector_size; | |
2367 | } | |
2368 | ||
2369 | static int read_capacity_10(struct scsi_disk *sdkp, struct scsi_device *sdp, | |
2370 | unsigned char *buffer) | |
2371 | { | |
2372 | unsigned char cmd[16]; | |
2373 | struct scsi_sense_hdr sshdr; | |
2374 | int sense_valid = 0; | |
2375 | int the_result; | |
2376 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; | |
2377 | sector_t lba; | |
2378 | unsigned sector_size; | |
2379 | ||
2380 | do { | |
2381 | cmd[0] = READ_CAPACITY; | |
2382 | memset(&cmd[1], 0, 9); | |
2383 | memset(buffer, 0, 8); | |
2384 | ||
2385 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, | |
2386 | buffer, 8, &sshdr, | |
2387 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
2388 | ||
2389 | if (media_not_present(sdkp, &sshdr)) | |
2390 | return -ENODEV; | |
2391 | ||
2392 | if (the_result) { | |
2393 | sense_valid = scsi_sense_valid(&sshdr); | |
2394 | if (sense_valid && | |
2395 | sshdr.sense_key == UNIT_ATTENTION && | |
2396 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) | |
2397 | /* Device reset might occur several times, | |
2398 | * give it one more chance */ | |
2399 | if (--reset_retries > 0) | |
2400 | continue; | |
2401 | } | |
2402 | retries--; | |
2403 | ||
2404 | } while (the_result && retries); | |
2405 | ||
2406 | if (the_result) { | |
2407 | sd_print_result(sdkp, "Read Capacity(10) failed", the_result); | |
2408 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); | |
2409 | return -EINVAL; | |
2410 | } | |
2411 | ||
2412 | sector_size = get_unaligned_be32(&buffer[4]); | |
2413 | lba = get_unaligned_be32(&buffer[0]); | |
2414 | ||
2415 | if (sdp->no_read_capacity_16 && (lba == 0xffffffff)) { | |
2416 | /* Some buggy (usb cardreader) devices return an lba of | |
2417 | 0xffffffff when the want to report a size of 0 (with | |
2418 | which they really mean no media is present) */ | |
2419 | sdkp->capacity = 0; | |
2420 | sdkp->physical_block_size = sector_size; | |
2421 | return sector_size; | |
2422 | } | |
2423 | ||
2424 | if (!sd_addressable_capacity(lba, sector_size)) { | |
2425 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a " | |
2426 | "kernel compiled with support for large block " | |
2427 | "devices.\n"); | |
2428 | sdkp->capacity = 0; | |
2429 | return -EOVERFLOW; | |
2430 | } | |
2431 | ||
2432 | sdkp->capacity = lba + 1; | |
2433 | sdkp->physical_block_size = sector_size; | |
2434 | return sector_size; | |
2435 | } | |
2436 | ||
2437 | static int sd_try_rc16_first(struct scsi_device *sdp) | |
2438 | { | |
2439 | if (sdp->host->max_cmd_len < 16) | |
2440 | return 0; | |
2441 | if (sdp->try_rc_10_first) | |
2442 | return 0; | |
2443 | if (sdp->scsi_level > SCSI_SPC_2) | |
2444 | return 1; | |
2445 | if (scsi_device_protection(sdp)) | |
2446 | return 1; | |
2447 | return 0; | |
2448 | } | |
2449 | ||
2450 | /* | |
2451 | * read disk capacity | |
2452 | */ | |
2453 | static void | |
2454 | sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer) | |
2455 | { | |
2456 | int sector_size; | |
2457 | struct scsi_device *sdp = sdkp->device; | |
2458 | ||
2459 | if (sd_try_rc16_first(sdp)) { | |
2460 | sector_size = read_capacity_16(sdkp, sdp, buffer); | |
2461 | if (sector_size == -EOVERFLOW) | |
2462 | goto got_data; | |
2463 | if (sector_size == -ENODEV) | |
2464 | return; | |
2465 | if (sector_size < 0) | |
2466 | sector_size = read_capacity_10(sdkp, sdp, buffer); | |
2467 | if (sector_size < 0) | |
2468 | return; | |
2469 | } else { | |
2470 | sector_size = read_capacity_10(sdkp, sdp, buffer); | |
2471 | if (sector_size == -EOVERFLOW) | |
2472 | goto got_data; | |
2473 | if (sector_size < 0) | |
2474 | return; | |
2475 | if ((sizeof(sdkp->capacity) > 4) && | |
2476 | (sdkp->capacity > 0xffffffffULL)) { | |
2477 | int old_sector_size = sector_size; | |
2478 | sd_printk(KERN_NOTICE, sdkp, "Very big device. " | |
2479 | "Trying to use READ CAPACITY(16).\n"); | |
2480 | sector_size = read_capacity_16(sdkp, sdp, buffer); | |
2481 | if (sector_size < 0) { | |
2482 | sd_printk(KERN_NOTICE, sdkp, | |
2483 | "Using 0xffffffff as device size\n"); | |
2484 | sdkp->capacity = 1 + (sector_t) 0xffffffff; | |
2485 | sector_size = old_sector_size; | |
2486 | goto got_data; | |
2487 | } | |
2488 | } | |
2489 | } | |
2490 | ||
2491 | /* Some devices are known to return the total number of blocks, | |
2492 | * not the highest block number. Some devices have versions | |
2493 | * which do this and others which do not. Some devices we might | |
2494 | * suspect of doing this but we don't know for certain. | |
2495 | * | |
2496 | * If we know the reported capacity is wrong, decrement it. If | |
2497 | * we can only guess, then assume the number of blocks is even | |
2498 | * (usually true but not always) and err on the side of lowering | |
2499 | * the capacity. | |
2500 | */ | |
2501 | if (sdp->fix_capacity || | |
2502 | (sdp->guess_capacity && (sdkp->capacity & 0x01))) { | |
2503 | sd_printk(KERN_INFO, sdkp, "Adjusting the sector count " | |
2504 | "from its reported value: %llu\n", | |
2505 | (unsigned long long) sdkp->capacity); | |
2506 | --sdkp->capacity; | |
2507 | } | |
2508 | ||
2509 | got_data: | |
2510 | if (sector_size == 0) { | |
2511 | sector_size = 512; | |
2512 | sd_printk(KERN_NOTICE, sdkp, "Sector size 0 reported, " | |
2513 | "assuming 512.\n"); | |
2514 | } | |
2515 | ||
2516 | if (sector_size != 512 && | |
2517 | sector_size != 1024 && | |
2518 | sector_size != 2048 && | |
2519 | sector_size != 4096) { | |
2520 | sd_printk(KERN_NOTICE, sdkp, "Unsupported sector size %d.\n", | |
2521 | sector_size); | |
2522 | /* | |
2523 | * The user might want to re-format the drive with | |
2524 | * a supported sectorsize. Once this happens, it | |
2525 | * would be relatively trivial to set the thing up. | |
2526 | * For this reason, we leave the thing in the table. | |
2527 | */ | |
2528 | sdkp->capacity = 0; | |
2529 | /* | |
2530 | * set a bogus sector size so the normal read/write | |
2531 | * logic in the block layer will eventually refuse any | |
2532 | * request on this device without tripping over power | |
2533 | * of two sector size assumptions | |
2534 | */ | |
2535 | sector_size = 512; | |
2536 | } | |
2537 | blk_queue_logical_block_size(sdp->request_queue, sector_size); | |
2538 | blk_queue_physical_block_size(sdp->request_queue, | |
2539 | sdkp->physical_block_size); | |
2540 | sdkp->device->sector_size = sector_size; | |
2541 | ||
2542 | if (sdkp->capacity > 0xffffffff) | |
2543 | sdp->use_16_for_rw = 1; | |
2544 | ||
2545 | } | |
2546 | ||
2547 | /* | |
2548 | * Print disk capacity | |
2549 | */ | |
2550 | static void | |
2551 | sd_print_capacity(struct scsi_disk *sdkp, | |
2552 | sector_t old_capacity) | |
2553 | { | |
2554 | int sector_size = sdkp->device->sector_size; | |
2555 | char cap_str_2[10], cap_str_10[10]; | |
2556 | ||
2557 | string_get_size(sdkp->capacity, sector_size, | |
2558 | STRING_UNITS_2, cap_str_2, sizeof(cap_str_2)); | |
2559 | string_get_size(sdkp->capacity, sector_size, | |
2560 | STRING_UNITS_10, cap_str_10, | |
2561 | sizeof(cap_str_10)); | |
2562 | ||
2563 | if (sdkp->first_scan || old_capacity != sdkp->capacity) { | |
2564 | sd_printk(KERN_NOTICE, sdkp, | |
2565 | "%llu %d-byte logical blocks: (%s/%s)\n", | |
2566 | (unsigned long long)sdkp->capacity, | |
2567 | sector_size, cap_str_10, cap_str_2); | |
2568 | ||
2569 | if (sdkp->physical_block_size != sector_size) | |
2570 | sd_printk(KERN_NOTICE, sdkp, | |
2571 | "%u-byte physical blocks\n", | |
2572 | sdkp->physical_block_size); | |
2573 | ||
2574 | sd_zbc_print_zones(sdkp); | |
2575 | } | |
2576 | } | |
2577 | ||
2578 | /* called with buffer of length 512 */ | |
2579 | static inline int | |
2580 | sd_do_mode_sense(struct scsi_device *sdp, int dbd, int modepage, | |
2581 | unsigned char *buffer, int len, struct scsi_mode_data *data, | |
2582 | struct scsi_sense_hdr *sshdr) | |
2583 | { | |
2584 | return scsi_mode_sense(sdp, dbd, modepage, buffer, len, | |
2585 | SD_TIMEOUT, SD_MAX_RETRIES, data, | |
2586 | sshdr); | |
2587 | } | |
2588 | ||
2589 | /* | |
2590 | * read write protect setting, if possible - called only in sd_revalidate_disk() | |
2591 | * called with buffer of length SD_BUF_SIZE | |
2592 | */ | |
2593 | static void | |
2594 | sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer) | |
2595 | { | |
2596 | int res; | |
2597 | struct scsi_device *sdp = sdkp->device; | |
2598 | struct scsi_mode_data data; | |
2599 | int old_wp = sdkp->write_prot; | |
2600 | ||
2601 | set_disk_ro(sdkp->disk, 0); | |
2602 | if (sdp->skip_ms_page_3f) { | |
2603 | sd_first_printk(KERN_NOTICE, sdkp, "Assuming Write Enabled\n"); | |
2604 | return; | |
2605 | } | |
2606 | ||
2607 | if (sdp->use_192_bytes_for_3f) { | |
2608 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 192, &data, NULL); | |
2609 | } else { | |
2610 | /* | |
2611 | * First attempt: ask for all pages (0x3F), but only 4 bytes. | |
2612 | * We have to start carefully: some devices hang if we ask | |
2613 | * for more than is available. | |
2614 | */ | |
2615 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 4, &data, NULL); | |
2616 | ||
2617 | /* | |
2618 | * Second attempt: ask for page 0 When only page 0 is | |
2619 | * implemented, a request for page 3F may return Sense Key | |
2620 | * 5: Illegal Request, Sense Code 24: Invalid field in | |
2621 | * CDB. | |
2622 | */ | |
2623 | if (!scsi_status_is_good(res)) | |
2624 | res = sd_do_mode_sense(sdp, 0, 0, buffer, 4, &data, NULL); | |
2625 | ||
2626 | /* | |
2627 | * Third attempt: ask 255 bytes, as we did earlier. | |
2628 | */ | |
2629 | if (!scsi_status_is_good(res)) | |
2630 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 255, | |
2631 | &data, NULL); | |
2632 | } | |
2633 | ||
2634 | if (!scsi_status_is_good(res)) { | |
2635 | sd_first_printk(KERN_WARNING, sdkp, | |
2636 | "Test WP failed, assume Write Enabled\n"); | |
2637 | } else { | |
2638 | sdkp->write_prot = ((data.device_specific & 0x80) != 0); | |
2639 | set_disk_ro(sdkp->disk, sdkp->write_prot); | |
2640 | if (sdkp->first_scan || old_wp != sdkp->write_prot) { | |
2641 | sd_printk(KERN_NOTICE, sdkp, "Write Protect is %s\n", | |
2642 | sdkp->write_prot ? "on" : "off"); | |
2643 | sd_printk(KERN_DEBUG, sdkp, "Mode Sense: %4ph\n", buffer); | |
2644 | } | |
2645 | } | |
2646 | } | |
2647 | ||
2648 | /* | |
2649 | * sd_read_cache_type - called only from sd_revalidate_disk() | |
2650 | * called with buffer of length SD_BUF_SIZE | |
2651 | */ | |
2652 | static void | |
2653 | sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer) | |
2654 | { | |
2655 | int len = 0, res; | |
2656 | struct scsi_device *sdp = sdkp->device; | |
2657 | ||
2658 | int dbd; | |
2659 | int modepage; | |
2660 | int first_len; | |
2661 | struct scsi_mode_data data; | |
2662 | struct scsi_sense_hdr sshdr; | |
2663 | int old_wce = sdkp->WCE; | |
2664 | int old_rcd = sdkp->RCD; | |
2665 | int old_dpofua = sdkp->DPOFUA; | |
2666 | ||
2667 | ||
2668 | if (sdkp->cache_override) | |
2669 | return; | |
2670 | ||
2671 | first_len = 4; | |
2672 | if (sdp->skip_ms_page_8) { | |
2673 | if (sdp->type == TYPE_RBC) | |
2674 | goto defaults; | |
2675 | else { | |
2676 | if (sdp->skip_ms_page_3f) | |
2677 | goto defaults; | |
2678 | modepage = 0x3F; | |
2679 | if (sdp->use_192_bytes_for_3f) | |
2680 | first_len = 192; | |
2681 | dbd = 0; | |
2682 | } | |
2683 | } else if (sdp->type == TYPE_RBC) { | |
2684 | modepage = 6; | |
2685 | dbd = 8; | |
2686 | } else { | |
2687 | modepage = 8; | |
2688 | dbd = 0; | |
2689 | } | |
2690 | ||
2691 | /* cautiously ask */ | |
2692 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, first_len, | |
2693 | &data, &sshdr); | |
2694 | ||
2695 | if (!scsi_status_is_good(res)) | |
2696 | goto bad_sense; | |
2697 | ||
2698 | if (!data.header_length) { | |
2699 | modepage = 6; | |
2700 | first_len = 0; | |
2701 | sd_first_printk(KERN_ERR, sdkp, | |
2702 | "Missing header in MODE_SENSE response\n"); | |
2703 | } | |
2704 | ||
2705 | /* that went OK, now ask for the proper length */ | |
2706 | len = data.length; | |
2707 | ||
2708 | /* | |
2709 | * We're only interested in the first three bytes, actually. | |
2710 | * But the data cache page is defined for the first 20. | |
2711 | */ | |
2712 | if (len < 3) | |
2713 | goto bad_sense; | |
2714 | else if (len > SD_BUF_SIZE) { | |
2715 | sd_first_printk(KERN_NOTICE, sdkp, "Truncating mode parameter " | |
2716 | "data from %d to %d bytes\n", len, SD_BUF_SIZE); | |
2717 | len = SD_BUF_SIZE; | |
2718 | } | |
2719 | if (modepage == 0x3F && sdp->use_192_bytes_for_3f) | |
2720 | len = 192; | |
2721 | ||
2722 | /* Get the data */ | |
2723 | if (len > first_len) | |
2724 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, len, | |
2725 | &data, &sshdr); | |
2726 | ||
2727 | if (scsi_status_is_good(res)) { | |
2728 | int offset = data.header_length + data.block_descriptor_length; | |
2729 | ||
2730 | while (offset < len) { | |
2731 | u8 page_code = buffer[offset] & 0x3F; | |
2732 | u8 spf = buffer[offset] & 0x40; | |
2733 | ||
2734 | if (page_code == 8 || page_code == 6) { | |
2735 | /* We're interested only in the first 3 bytes. | |
2736 | */ | |
2737 | if (len - offset <= 2) { | |
2738 | sd_first_printk(KERN_ERR, sdkp, | |
2739 | "Incomplete mode parameter " | |
2740 | "data\n"); | |
2741 | goto defaults; | |
2742 | } else { | |
2743 | modepage = page_code; | |
2744 | goto Page_found; | |
2745 | } | |
2746 | } else { | |
2747 | /* Go to the next page */ | |
2748 | if (spf && len - offset > 3) | |
2749 | offset += 4 + (buffer[offset+2] << 8) + | |
2750 | buffer[offset+3]; | |
2751 | else if (!spf && len - offset > 1) | |
2752 | offset += 2 + buffer[offset+1]; | |
2753 | else { | |
2754 | sd_first_printk(KERN_ERR, sdkp, | |
2755 | "Incomplete mode " | |
2756 | "parameter data\n"); | |
2757 | goto defaults; | |
2758 | } | |
2759 | } | |
2760 | } | |
2761 | ||
2762 | sd_first_printk(KERN_ERR, sdkp, "No Caching mode page found\n"); | |
2763 | goto defaults; | |
2764 | ||
2765 | Page_found: | |
2766 | if (modepage == 8) { | |
2767 | sdkp->WCE = ((buffer[offset + 2] & 0x04) != 0); | |
2768 | sdkp->RCD = ((buffer[offset + 2] & 0x01) != 0); | |
2769 | } else { | |
2770 | sdkp->WCE = ((buffer[offset + 2] & 0x01) == 0); | |
2771 | sdkp->RCD = 0; | |
2772 | } | |
2773 | ||
2774 | sdkp->DPOFUA = (data.device_specific & 0x10) != 0; | |
2775 | if (sdp->broken_fua) { | |
2776 | sd_first_printk(KERN_NOTICE, sdkp, "Disabling FUA\n"); | |
2777 | sdkp->DPOFUA = 0; | |
2778 | } else if (sdkp->DPOFUA && !sdkp->device->use_10_for_rw && | |
2779 | !sdkp->device->use_16_for_rw) { | |
2780 | sd_first_printk(KERN_NOTICE, sdkp, | |
2781 | "Uses READ/WRITE(6), disabling FUA\n"); | |
2782 | sdkp->DPOFUA = 0; | |
2783 | } | |
2784 | ||
2785 | /* No cache flush allowed for write protected devices */ | |
2786 | if (sdkp->WCE && sdkp->write_prot) | |
2787 | sdkp->WCE = 0; | |
2788 | ||
2789 | if (sdkp->first_scan || old_wce != sdkp->WCE || | |
2790 | old_rcd != sdkp->RCD || old_dpofua != sdkp->DPOFUA) | |
2791 | sd_printk(KERN_NOTICE, sdkp, | |
2792 | "Write cache: %s, read cache: %s, %s\n", | |
2793 | sdkp->WCE ? "enabled" : "disabled", | |
2794 | sdkp->RCD ? "disabled" : "enabled", | |
2795 | sdkp->DPOFUA ? "supports DPO and FUA" | |
2796 | : "doesn't support DPO or FUA"); | |
2797 | ||
2798 | return; | |
2799 | } | |
2800 | ||
2801 | bad_sense: | |
2802 | if (scsi_sense_valid(&sshdr) && | |
2803 | sshdr.sense_key == ILLEGAL_REQUEST && | |
2804 | sshdr.asc == 0x24 && sshdr.ascq == 0x0) | |
2805 | /* Invalid field in CDB */ | |
2806 | sd_first_printk(KERN_NOTICE, sdkp, "Cache data unavailable\n"); | |
2807 | else | |
2808 | sd_first_printk(KERN_ERR, sdkp, | |
2809 | "Asking for cache data failed\n"); | |
2810 | ||
2811 | defaults: | |
2812 | if (sdp->wce_default_on) { | |
2813 | sd_first_printk(KERN_NOTICE, sdkp, | |
2814 | "Assuming drive cache: write back\n"); | |
2815 | sdkp->WCE = 1; | |
2816 | } else { | |
2817 | sd_first_printk(KERN_ERR, sdkp, | |
2818 | "Assuming drive cache: write through\n"); | |
2819 | sdkp->WCE = 0; | |
2820 | } | |
2821 | sdkp->RCD = 0; | |
2822 | sdkp->DPOFUA = 0; | |
2823 | } | |
2824 | ||
2825 | /* | |
2826 | * The ATO bit indicates whether the DIF application tag is available | |
2827 | * for use by the operating system. | |
2828 | */ | |
2829 | static void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer) | |
2830 | { | |
2831 | int res, offset; | |
2832 | struct scsi_device *sdp = sdkp->device; | |
2833 | struct scsi_mode_data data; | |
2834 | struct scsi_sense_hdr sshdr; | |
2835 | ||
2836 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) | |
2837 | return; | |
2838 | ||
2839 | if (sdkp->protection_type == 0) | |
2840 | return; | |
2841 | ||
2842 | res = scsi_mode_sense(sdp, 1, 0x0a, buffer, 36, SD_TIMEOUT, | |
2843 | SD_MAX_RETRIES, &data, &sshdr); | |
2844 | ||
2845 | if (!scsi_status_is_good(res) || !data.header_length || | |
2846 | data.length < 6) { | |
2847 | sd_first_printk(KERN_WARNING, sdkp, | |
2848 | "getting Control mode page failed, assume no ATO\n"); | |
2849 | ||
2850 | if (scsi_sense_valid(&sshdr)) | |
2851 | sd_print_sense_hdr(sdkp, &sshdr); | |
2852 | ||
2853 | return; | |
2854 | } | |
2855 | ||
2856 | offset = data.header_length + data.block_descriptor_length; | |
2857 | ||
2858 | if ((buffer[offset] & 0x3f) != 0x0a) { | |
2859 | sd_first_printk(KERN_ERR, sdkp, "ATO Got wrong page\n"); | |
2860 | return; | |
2861 | } | |
2862 | ||
2863 | if ((buffer[offset + 5] & 0x80) == 0) | |
2864 | return; | |
2865 | ||
2866 | sdkp->ATO = 1; | |
2867 | ||
2868 | return; | |
2869 | } | |
2870 | ||
2871 | /** | |
2872 | * sd_read_block_limits - Query disk device for preferred I/O sizes. | |
2873 | * @sdkp: disk to query | |
2874 | */ | |
2875 | static void sd_read_block_limits(struct scsi_disk *sdkp) | |
2876 | { | |
2877 | unsigned int sector_sz = sdkp->device->sector_size; | |
2878 | const int vpd_len = 64; | |
2879 | unsigned char *buffer = kmalloc(vpd_len, GFP_KERNEL); | |
2880 | ||
2881 | if (!buffer || | |
2882 | /* Block Limits VPD */ | |
2883 | scsi_get_vpd_page(sdkp->device, 0xb0, buffer, vpd_len)) | |
2884 | goto out; | |
2885 | ||
2886 | blk_queue_io_min(sdkp->disk->queue, | |
2887 | get_unaligned_be16(&buffer[6]) * sector_sz); | |
2888 | ||
2889 | sdkp->max_xfer_blocks = get_unaligned_be32(&buffer[8]); | |
2890 | sdkp->opt_xfer_blocks = get_unaligned_be32(&buffer[12]); | |
2891 | ||
2892 | if (buffer[3] == 0x3c) { | |
2893 | unsigned int lba_count, desc_count; | |
2894 | ||
2895 | sdkp->max_ws_blocks = (u32)get_unaligned_be64(&buffer[36]); | |
2896 | ||
2897 | if (!sdkp->lbpme) | |
2898 | goto out; | |
2899 | ||
2900 | lba_count = get_unaligned_be32(&buffer[20]); | |
2901 | desc_count = get_unaligned_be32(&buffer[24]); | |
2902 | ||
2903 | if (lba_count && desc_count) | |
2904 | sdkp->max_unmap_blocks = lba_count; | |
2905 | ||
2906 | sdkp->unmap_granularity = get_unaligned_be32(&buffer[28]); | |
2907 | ||
2908 | if (buffer[32] & 0x80) | |
2909 | sdkp->unmap_alignment = | |
2910 | get_unaligned_be32(&buffer[32]) & ~(1 << 31); | |
2911 | ||
2912 | if (!sdkp->lbpvpd) { /* LBP VPD page not provided */ | |
2913 | ||
2914 | if (sdkp->max_unmap_blocks) | |
2915 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
2916 | else | |
2917 | sd_config_discard(sdkp, SD_LBP_WS16); | |
2918 | ||
2919 | } else { /* LBP VPD page tells us what to use */ | |
2920 | if (sdkp->lbpu && sdkp->max_unmap_blocks) | |
2921 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
2922 | else if (sdkp->lbpws) | |
2923 | sd_config_discard(sdkp, SD_LBP_WS16); | |
2924 | else if (sdkp->lbpws10) | |
2925 | sd_config_discard(sdkp, SD_LBP_WS10); | |
2926 | else if (sdkp->lbpu && sdkp->max_unmap_blocks) | |
2927 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
2928 | else | |
2929 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
2930 | } | |
2931 | } | |
2932 | ||
2933 | out: | |
2934 | kfree(buffer); | |
2935 | } | |
2936 | ||
2937 | /** | |
2938 | * sd_read_block_characteristics - Query block dev. characteristics | |
2939 | * @sdkp: disk to query | |
2940 | */ | |
2941 | static void sd_read_block_characteristics(struct scsi_disk *sdkp) | |
2942 | { | |
2943 | struct request_queue *q = sdkp->disk->queue; | |
2944 | unsigned char *buffer; | |
2945 | u16 rot; | |
2946 | const int vpd_len = 64; | |
2947 | ||
2948 | buffer = kmalloc(vpd_len, GFP_KERNEL); | |
2949 | ||
2950 | if (!buffer || | |
2951 | /* Block Device Characteristics VPD */ | |
2952 | scsi_get_vpd_page(sdkp->device, 0xb1, buffer, vpd_len)) | |
2953 | goto out; | |
2954 | ||
2955 | rot = get_unaligned_be16(&buffer[4]); | |
2956 | ||
2957 | if (rot == 1) { | |
2958 | queue_flag_set_unlocked(QUEUE_FLAG_NONROT, q); | |
2959 | queue_flag_clear_unlocked(QUEUE_FLAG_ADD_RANDOM, q); | |
2960 | } | |
2961 | ||
2962 | if (sdkp->device->type == TYPE_ZBC) { | |
2963 | /* Host-managed */ | |
2964 | q->limits.zoned = BLK_ZONED_HM; | |
2965 | } else { | |
2966 | sdkp->zoned = (buffer[8] >> 4) & 3; | |
2967 | if (sdkp->zoned == 1) | |
2968 | /* Host-aware */ | |
2969 | q->limits.zoned = BLK_ZONED_HA; | |
2970 | else | |
2971 | /* | |
2972 | * Treat drive-managed devices as | |
2973 | * regular block devices. | |
2974 | */ | |
2975 | q->limits.zoned = BLK_ZONED_NONE; | |
2976 | } | |
2977 | if (blk_queue_is_zoned(q) && sdkp->first_scan) | |
2978 | sd_printk(KERN_NOTICE, sdkp, "Host-%s zoned block device\n", | |
2979 | q->limits.zoned == BLK_ZONED_HM ? "managed" : "aware"); | |
2980 | ||
2981 | out: | |
2982 | kfree(buffer); | |
2983 | } | |
2984 | ||
2985 | /** | |
2986 | * sd_read_block_provisioning - Query provisioning VPD page | |
2987 | * @sdkp: disk to query | |
2988 | */ | |
2989 | static void sd_read_block_provisioning(struct scsi_disk *sdkp) | |
2990 | { | |
2991 | unsigned char *buffer; | |
2992 | const int vpd_len = 8; | |
2993 | ||
2994 | if (sdkp->lbpme == 0) | |
2995 | return; | |
2996 | ||
2997 | buffer = kmalloc(vpd_len, GFP_KERNEL); | |
2998 | ||
2999 | if (!buffer || scsi_get_vpd_page(sdkp->device, 0xb2, buffer, vpd_len)) | |
3000 | goto out; | |
3001 | ||
3002 | sdkp->lbpvpd = 1; | |
3003 | sdkp->lbpu = (buffer[5] >> 7) & 1; /* UNMAP */ | |
3004 | sdkp->lbpws = (buffer[5] >> 6) & 1; /* WRITE SAME(16) with UNMAP */ | |
3005 | sdkp->lbpws10 = (buffer[5] >> 5) & 1; /* WRITE SAME(10) with UNMAP */ | |
3006 | ||
3007 | out: | |
3008 | kfree(buffer); | |
3009 | } | |
3010 | ||
3011 | static void sd_read_write_same(struct scsi_disk *sdkp, unsigned char *buffer) | |
3012 | { | |
3013 | struct scsi_device *sdev = sdkp->device; | |
3014 | ||
3015 | if (sdev->host->no_write_same) { | |
3016 | sdev->no_write_same = 1; | |
3017 | ||
3018 | return; | |
3019 | } | |
3020 | ||
3021 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, INQUIRY) < 0) { | |
3022 | /* too large values might cause issues with arcmsr */ | |
3023 | int vpd_buf_len = 64; | |
3024 | ||
3025 | sdev->no_report_opcodes = 1; | |
3026 | ||
3027 | /* Disable WRITE SAME if REPORT SUPPORTED OPERATION | |
3028 | * CODES is unsupported and the device has an ATA | |
3029 | * Information VPD page (SAT). | |
3030 | */ | |
3031 | if (!scsi_get_vpd_page(sdev, 0x89, buffer, vpd_buf_len)) | |
3032 | sdev->no_write_same = 1; | |
3033 | } | |
3034 | ||
3035 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME_16) == 1) | |
3036 | sdkp->ws16 = 1; | |
3037 | ||
3038 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME) == 1) | |
3039 | sdkp->ws10 = 1; | |
3040 | } | |
3041 | ||
3042 | static void sd_read_security(struct scsi_disk *sdkp, unsigned char *buffer) | |
3043 | { | |
3044 | struct scsi_device *sdev = sdkp->device; | |
3045 | ||
3046 | if (!sdev->security_supported) | |
3047 | return; | |
3048 | ||
3049 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, | |
3050 | SECURITY_PROTOCOL_IN) == 1 && | |
3051 | scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, | |
3052 | SECURITY_PROTOCOL_OUT) == 1) | |
3053 | sdkp->security = 1; | |
3054 | } | |
3055 | ||
3056 | /** | |
3057 | * sd_revalidate_disk - called the first time a new disk is seen, | |
3058 | * performs disk spin up, read_capacity, etc. | |
3059 | * @disk: struct gendisk we care about | |
3060 | **/ | |
3061 | static int sd_revalidate_disk(struct gendisk *disk) | |
3062 | { | |
3063 | struct scsi_disk *sdkp = scsi_disk(disk); | |
3064 | struct scsi_device *sdp = sdkp->device; | |
3065 | struct request_queue *q = sdkp->disk->queue; | |
3066 | sector_t old_capacity = sdkp->capacity; | |
3067 | unsigned char *buffer; | |
3068 | unsigned int dev_max, rw_max; | |
3069 | ||
3070 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, | |
3071 | "sd_revalidate_disk\n")); | |
3072 | ||
3073 | /* | |
3074 | * If the device is offline, don't try and read capacity or any | |
3075 | * of the other niceties. | |
3076 | */ | |
3077 | if (!scsi_device_online(sdp)) | |
3078 | goto out; | |
3079 | ||
3080 | buffer = kmalloc(SD_BUF_SIZE, GFP_KERNEL); | |
3081 | if (!buffer) { | |
3082 | sd_printk(KERN_WARNING, sdkp, "sd_revalidate_disk: Memory " | |
3083 | "allocation failure.\n"); | |
3084 | goto out; | |
3085 | } | |
3086 | ||
3087 | sd_spinup_disk(sdkp); | |
3088 | ||
3089 | /* | |
3090 | * Without media there is no reason to ask; moreover, some devices | |
3091 | * react badly if we do. | |
3092 | */ | |
3093 | if (sdkp->media_present) { | |
3094 | sd_read_capacity(sdkp, buffer); | |
3095 | ||
3096 | if (scsi_device_supports_vpd(sdp)) { | |
3097 | sd_read_block_provisioning(sdkp); | |
3098 | sd_read_block_limits(sdkp); | |
3099 | sd_read_block_characteristics(sdkp); | |
3100 | sd_zbc_read_zones(sdkp, buffer); | |
3101 | } | |
3102 | ||
3103 | sd_print_capacity(sdkp, old_capacity); | |
3104 | ||
3105 | sd_read_write_protect_flag(sdkp, buffer); | |
3106 | sd_read_cache_type(sdkp, buffer); | |
3107 | sd_read_app_tag_own(sdkp, buffer); | |
3108 | sd_read_write_same(sdkp, buffer); | |
3109 | sd_read_security(sdkp, buffer); | |
3110 | } | |
3111 | ||
3112 | /* | |
3113 | * We now have all cache related info, determine how we deal | |
3114 | * with flush requests. | |
3115 | */ | |
3116 | sd_set_flush_flag(sdkp); | |
3117 | ||
3118 | /* Initial block count limit based on CDB TRANSFER LENGTH field size. */ | |
3119 | dev_max = sdp->use_16_for_rw ? SD_MAX_XFER_BLOCKS : SD_DEF_XFER_BLOCKS; | |
3120 | ||
3121 | /* Some devices report a maximum block count for READ/WRITE requests. */ | |
3122 | dev_max = min_not_zero(dev_max, sdkp->max_xfer_blocks); | |
3123 | q->limits.max_dev_sectors = logical_to_sectors(sdp, dev_max); | |
3124 | ||
3125 | /* | |
3126 | * Determine the device's preferred I/O size for reads and writes | |
3127 | * unless the reported value is unreasonably small, large, or | |
3128 | * garbage. | |
3129 | */ | |
3130 | if (sdkp->opt_xfer_blocks && | |
3131 | sdkp->opt_xfer_blocks <= dev_max && | |
3132 | sdkp->opt_xfer_blocks <= SD_DEF_XFER_BLOCKS && | |
3133 | logical_to_bytes(sdp, sdkp->opt_xfer_blocks) >= PAGE_SIZE) { | |
3134 | q->limits.io_opt = logical_to_bytes(sdp, sdkp->opt_xfer_blocks); | |
3135 | rw_max = logical_to_sectors(sdp, sdkp->opt_xfer_blocks); | |
3136 | } else | |
3137 | rw_max = min_not_zero(logical_to_sectors(sdp, dev_max), | |
3138 | (sector_t)BLK_DEF_MAX_SECTORS); | |
3139 | ||
3140 | /* Do not exceed controller limit */ | |
3141 | rw_max = min(rw_max, queue_max_hw_sectors(q)); | |
3142 | ||
3143 | /* | |
3144 | * Only update max_sectors if previously unset or if the current value | |
3145 | * exceeds the capabilities of the hardware. | |
3146 | */ | |
3147 | if (sdkp->first_scan || | |
3148 | q->limits.max_sectors > q->limits.max_dev_sectors || | |
3149 | q->limits.max_sectors > q->limits.max_hw_sectors) | |
3150 | q->limits.max_sectors = rw_max; | |
3151 | ||
3152 | sdkp->first_scan = 0; | |
3153 | ||
3154 | set_capacity(disk, logical_to_sectors(sdp, sdkp->capacity)); | |
3155 | sd_config_write_same(sdkp); | |
3156 | kfree(buffer); | |
3157 | ||
3158 | out: | |
3159 | return 0; | |
3160 | } | |
3161 | ||
3162 | /** | |
3163 | * sd_unlock_native_capacity - unlock native capacity | |
3164 | * @disk: struct gendisk to set capacity for | |
3165 | * | |
3166 | * Block layer calls this function if it detects that partitions | |
3167 | * on @disk reach beyond the end of the device. If the SCSI host | |
3168 | * implements ->unlock_native_capacity() method, it's invoked to | |
3169 | * give it a chance to adjust the device capacity. | |
3170 | * | |
3171 | * CONTEXT: | |
3172 | * Defined by block layer. Might sleep. | |
3173 | */ | |
3174 | static void sd_unlock_native_capacity(struct gendisk *disk) | |
3175 | { | |
3176 | struct scsi_device *sdev = scsi_disk(disk)->device; | |
3177 | ||
3178 | if (sdev->host->hostt->unlock_native_capacity) | |
3179 | sdev->host->hostt->unlock_native_capacity(sdev); | |
3180 | } | |
3181 | ||
3182 | /** | |
3183 | * sd_format_disk_name - format disk name | |
3184 | * @prefix: name prefix - ie. "sd" for SCSI disks | |
3185 | * @index: index of the disk to format name for | |
3186 | * @buf: output buffer | |
3187 | * @buflen: length of the output buffer | |
3188 | * | |
3189 | * SCSI disk names starts at sda. The 26th device is sdz and the | |
3190 | * 27th is sdaa. The last one for two lettered suffix is sdzz | |
3191 | * which is followed by sdaaa. | |
3192 | * | |
3193 | * This is basically 26 base counting with one extra 'nil' entry | |
3194 | * at the beginning from the second digit on and can be | |
3195 | * determined using similar method as 26 base conversion with the | |
3196 | * index shifted -1 after each digit is computed. | |
3197 | * | |
3198 | * CONTEXT: | |
3199 | * Don't care. | |
3200 | * | |
3201 | * RETURNS: | |
3202 | * 0 on success, -errno on failure. | |
3203 | */ | |
3204 | static int sd_format_disk_name(char *prefix, int index, char *buf, int buflen) | |
3205 | { | |
3206 | const int base = 'z' - 'a' + 1; | |
3207 | char *begin = buf + strlen(prefix); | |
3208 | char *end = buf + buflen; | |
3209 | char *p; | |
3210 | int unit; | |
3211 | ||
3212 | p = end - 1; | |
3213 | *p = '\0'; | |
3214 | unit = base; | |
3215 | do { | |
3216 | if (p == begin) | |
3217 | return -EINVAL; | |
3218 | *--p = 'a' + (index % unit); | |
3219 | index = (index / unit) - 1; | |
3220 | } while (index >= 0); | |
3221 | ||
3222 | memmove(begin, p, end - p); | |
3223 | memcpy(buf, prefix, strlen(prefix)); | |
3224 | ||
3225 | return 0; | |
3226 | } | |
3227 | ||
3228 | /* | |
3229 | * The asynchronous part of sd_probe | |
3230 | */ | |
3231 | static void sd_probe_async(void *data, async_cookie_t cookie) | |
3232 | { | |
3233 | struct scsi_disk *sdkp = data; | |
3234 | struct scsi_device *sdp; | |
3235 | struct gendisk *gd; | |
3236 | u32 index; | |
3237 | struct device *dev; | |
3238 | ||
3239 | sdp = sdkp->device; | |
3240 | gd = sdkp->disk; | |
3241 | index = sdkp->index; | |
3242 | dev = &sdp->sdev_gendev; | |
3243 | ||
3244 | gd->major = sd_major((index & 0xf0) >> 4); | |
3245 | gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00); | |
3246 | gd->minors = SD_MINORS; | |
3247 | ||
3248 | gd->fops = &sd_fops; | |
3249 | gd->private_data = &sdkp->driver; | |
3250 | gd->queue = sdkp->device->request_queue; | |
3251 | ||
3252 | /* defaults, until the device tells us otherwise */ | |
3253 | sdp->sector_size = 512; | |
3254 | sdkp->capacity = 0; | |
3255 | sdkp->media_present = 1; | |
3256 | sdkp->write_prot = 0; | |
3257 | sdkp->cache_override = 0; | |
3258 | sdkp->WCE = 0; | |
3259 | sdkp->RCD = 0; | |
3260 | sdkp->ATO = 0; | |
3261 | sdkp->first_scan = 1; | |
3262 | sdkp->max_medium_access_timeouts = SD_MAX_MEDIUM_TIMEOUTS; | |
3263 | ||
3264 | sd_revalidate_disk(gd); | |
3265 | ||
3266 | gd->flags = GENHD_FL_EXT_DEVT; | |
3267 | if (sdp->removable) { | |
3268 | gd->flags |= GENHD_FL_REMOVABLE; | |
3269 | gd->events |= DISK_EVENT_MEDIA_CHANGE; | |
3270 | } | |
3271 | ||
3272 | blk_pm_runtime_init(sdp->request_queue, dev); | |
3273 | device_add_disk(dev, gd); | |
3274 | if (sdkp->capacity) | |
3275 | sd_dif_config_host(sdkp); | |
3276 | ||
3277 | sd_revalidate_disk(gd); | |
3278 | ||
3279 | if (sdkp->security) { | |
3280 | sdkp->opal_dev = init_opal_dev(sdp, &sd_sec_submit); | |
3281 | if (sdkp->opal_dev) | |
3282 | sd_printk(KERN_NOTICE, sdkp, "supports TCG Opal\n"); | |
3283 | } | |
3284 | ||
3285 | sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n", | |
3286 | sdp->removable ? "removable " : ""); | |
3287 | scsi_autopm_put_device(sdp); | |
3288 | put_device(&sdkp->dev); | |
3289 | } | |
3290 | ||
3291 | /** | |
3292 | * sd_probe - called during driver initialization and whenever a | |
3293 | * new scsi device is attached to the system. It is called once | |
3294 | * for each scsi device (not just disks) present. | |
3295 | * @dev: pointer to device object | |
3296 | * | |
3297 | * Returns 0 if successful (or not interested in this scsi device | |
3298 | * (e.g. scanner)); 1 when there is an error. | |
3299 | * | |
3300 | * Note: this function is invoked from the scsi mid-level. | |
3301 | * This function sets up the mapping between a given | |
3302 | * <host,channel,id,lun> (found in sdp) and new device name | |
3303 | * (e.g. /dev/sda). More precisely it is the block device major | |
3304 | * and minor number that is chosen here. | |
3305 | * | |
3306 | * Assume sd_probe is not re-entrant (for time being) | |
3307 | * Also think about sd_probe() and sd_remove() running coincidentally. | |
3308 | **/ | |
3309 | static int sd_probe(struct device *dev) | |
3310 | { | |
3311 | struct scsi_device *sdp = to_scsi_device(dev); | |
3312 | struct scsi_disk *sdkp; | |
3313 | struct gendisk *gd; | |
3314 | int index; | |
3315 | int error; | |
3316 | ||
3317 | scsi_autopm_get_device(sdp); | |
3318 | error = -ENODEV; | |
3319 | if (sdp->type != TYPE_DISK && | |
3320 | sdp->type != TYPE_ZBC && | |
3321 | sdp->type != TYPE_MOD && | |
3322 | sdp->type != TYPE_RBC) | |
3323 | goto out; | |
3324 | ||
3325 | #ifndef CONFIG_BLK_DEV_ZONED | |
3326 | if (sdp->type == TYPE_ZBC) | |
3327 | goto out; | |
3328 | #endif | |
3329 | SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO, sdp, | |
3330 | "sd_probe\n")); | |
3331 | ||
3332 | error = -ENOMEM; | |
3333 | sdkp = kzalloc(sizeof(*sdkp), GFP_KERNEL); | |
3334 | if (!sdkp) | |
3335 | goto out; | |
3336 | ||
3337 | gd = alloc_disk(SD_MINORS); | |
3338 | if (!gd) | |
3339 | goto out_free; | |
3340 | ||
3341 | do { | |
3342 | if (!ida_pre_get(&sd_index_ida, GFP_KERNEL)) | |
3343 | goto out_put; | |
3344 | ||
3345 | spin_lock(&sd_index_lock); | |
3346 | error = ida_get_new(&sd_index_ida, &index); | |
3347 | spin_unlock(&sd_index_lock); | |
3348 | } while (error == -EAGAIN); | |
3349 | ||
3350 | if (error) { | |
3351 | sdev_printk(KERN_WARNING, sdp, "sd_probe: memory exhausted.\n"); | |
3352 | goto out_put; | |
3353 | } | |
3354 | ||
3355 | error = sd_format_disk_name("sd", index, gd->disk_name, DISK_NAME_LEN); | |
3356 | if (error) { | |
3357 | sdev_printk(KERN_WARNING, sdp, "SCSI disk (sd) name length exceeded.\n"); | |
3358 | goto out_free_index; | |
3359 | } | |
3360 | ||
3361 | sdkp->device = sdp; | |
3362 | sdkp->driver = &sd_template; | |
3363 | sdkp->disk = gd; | |
3364 | sdkp->index = index; | |
3365 | atomic_set(&sdkp->openers, 0); | |
3366 | atomic_set(&sdkp->device->ioerr_cnt, 0); | |
3367 | ||
3368 | if (!sdp->request_queue->rq_timeout) { | |
3369 | if (sdp->type != TYPE_MOD) | |
3370 | blk_queue_rq_timeout(sdp->request_queue, SD_TIMEOUT); | |
3371 | else | |
3372 | blk_queue_rq_timeout(sdp->request_queue, | |
3373 | SD_MOD_TIMEOUT); | |
3374 | } | |
3375 | ||
3376 | device_initialize(&sdkp->dev); | |
3377 | sdkp->dev.parent = dev; | |
3378 | sdkp->dev.class = &sd_disk_class; | |
3379 | dev_set_name(&sdkp->dev, "%s", dev_name(dev)); | |
3380 | ||
3381 | error = device_add(&sdkp->dev); | |
3382 | if (error) | |
3383 | goto out_free_index; | |
3384 | ||
3385 | get_device(dev); | |
3386 | dev_set_drvdata(dev, sdkp); | |
3387 | ||
3388 | get_device(&sdkp->dev); /* prevent release before async_schedule */ | |
3389 | async_schedule_domain(sd_probe_async, sdkp, &scsi_sd_probe_domain); | |
3390 | ||
3391 | return 0; | |
3392 | ||
3393 | out_free_index: | |
3394 | spin_lock(&sd_index_lock); | |
3395 | ida_remove(&sd_index_ida, index); | |
3396 | spin_unlock(&sd_index_lock); | |
3397 | out_put: | |
3398 | put_disk(gd); | |
3399 | out_free: | |
3400 | kfree(sdkp); | |
3401 | out: | |
3402 | scsi_autopm_put_device(sdp); | |
3403 | return error; | |
3404 | } | |
3405 | ||
3406 | /** | |
3407 | * sd_remove - called whenever a scsi disk (previously recognized by | |
3408 | * sd_probe) is detached from the system. It is called (potentially | |
3409 | * multiple times) during sd module unload. | |
3410 | * @dev: pointer to device object | |
3411 | * | |
3412 | * Note: this function is invoked from the scsi mid-level. | |
3413 | * This function potentially frees up a device name (e.g. /dev/sdc) | |
3414 | * that could be re-used by a subsequent sd_probe(). | |
3415 | * This function is not called when the built-in sd driver is "exit-ed". | |
3416 | **/ | |
3417 | static int sd_remove(struct device *dev) | |
3418 | { | |
3419 | struct scsi_disk *sdkp; | |
3420 | dev_t devt; | |
3421 | ||
3422 | sdkp = dev_get_drvdata(dev); | |
3423 | devt = disk_devt(sdkp->disk); | |
3424 | scsi_autopm_get_device(sdkp->device); | |
3425 | ||
3426 | async_synchronize_full_domain(&scsi_sd_pm_domain); | |
3427 | async_synchronize_full_domain(&scsi_sd_probe_domain); | |
3428 | device_del(&sdkp->dev); | |
3429 | del_gendisk(sdkp->disk); | |
3430 | sd_shutdown(dev); | |
3431 | ||
3432 | sd_zbc_remove(sdkp); | |
3433 | ||
3434 | free_opal_dev(sdkp->opal_dev); | |
3435 | ||
3436 | blk_register_region(devt, SD_MINORS, NULL, | |
3437 | sd_default_probe, NULL, NULL); | |
3438 | ||
3439 | mutex_lock(&sd_ref_mutex); | |
3440 | dev_set_drvdata(dev, NULL); | |
3441 | put_device(&sdkp->dev); | |
3442 | mutex_unlock(&sd_ref_mutex); | |
3443 | ||
3444 | return 0; | |
3445 | } | |
3446 | ||
3447 | /** | |
3448 | * scsi_disk_release - Called to free the scsi_disk structure | |
3449 | * @dev: pointer to embedded class device | |
3450 | * | |
3451 | * sd_ref_mutex must be held entering this routine. Because it is | |
3452 | * called on last put, you should always use the scsi_disk_get() | |
3453 | * scsi_disk_put() helpers which manipulate the semaphore directly | |
3454 | * and never do a direct put_device. | |
3455 | **/ | |
3456 | static void scsi_disk_release(struct device *dev) | |
3457 | { | |
3458 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
3459 | struct gendisk *disk = sdkp->disk; | |
3460 | ||
3461 | spin_lock(&sd_index_lock); | |
3462 | ida_remove(&sd_index_ida, sdkp->index); | |
3463 | spin_unlock(&sd_index_lock); | |
3464 | ||
3465 | disk->private_data = NULL; | |
3466 | put_disk(disk); | |
3467 | put_device(&sdkp->device->sdev_gendev); | |
3468 | ||
3469 | kfree(sdkp); | |
3470 | } | |
3471 | ||
3472 | static int sd_start_stop_device(struct scsi_disk *sdkp, int start) | |
3473 | { | |
3474 | unsigned char cmd[6] = { START_STOP }; /* START_VALID */ | |
3475 | struct scsi_sense_hdr sshdr; | |
3476 | struct scsi_device *sdp = sdkp->device; | |
3477 | int res; | |
3478 | ||
3479 | if (start) | |
3480 | cmd[4] |= 1; /* START */ | |
3481 | ||
3482 | if (sdp->start_stop_pwr_cond) | |
3483 | cmd[4] |= start ? 1 << 4 : 3 << 4; /* Active or Standby */ | |
3484 | ||
3485 | if (!scsi_device_online(sdp)) | |
3486 | return -ENODEV; | |
3487 | ||
3488 | res = scsi_execute(sdp, cmd, DMA_NONE, NULL, 0, NULL, &sshdr, | |
3489 | SD_TIMEOUT, SD_MAX_RETRIES, 0, RQF_PM, NULL); | |
3490 | if (res) { | |
3491 | sd_print_result(sdkp, "Start/Stop Unit failed", res); | |
3492 | if (driver_byte(res) & DRIVER_SENSE) | |
3493 | sd_print_sense_hdr(sdkp, &sshdr); | |
3494 | if (scsi_sense_valid(&sshdr) && | |
3495 | /* 0x3a is medium not present */ | |
3496 | sshdr.asc == 0x3a) | |
3497 | res = 0; | |
3498 | } | |
3499 | ||
3500 | /* SCSI error codes must not go to the generic layer */ | |
3501 | if (res) | |
3502 | return -EIO; | |
3503 | ||
3504 | return 0; | |
3505 | } | |
3506 | ||
3507 | /* | |
3508 | * Send a SYNCHRONIZE CACHE instruction down to the device through | |
3509 | * the normal SCSI command structure. Wait for the command to | |
3510 | * complete. | |
3511 | */ | |
3512 | static void sd_shutdown(struct device *dev) | |
3513 | { | |
3514 | struct scsi_disk *sdkp = dev_get_drvdata(dev); | |
3515 | ||
3516 | if (!sdkp) | |
3517 | return; /* this can happen */ | |
3518 | ||
3519 | if (pm_runtime_suspended(dev)) | |
3520 | return; | |
3521 | ||
3522 | if (sdkp->WCE && sdkp->media_present) { | |
3523 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); | |
3524 | sd_sync_cache(sdkp, NULL); | |
3525 | } | |
3526 | ||
3527 | if (system_state != SYSTEM_RESTART && sdkp->device->manage_start_stop) { | |
3528 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); | |
3529 | sd_start_stop_device(sdkp, 0); | |
3530 | } | |
3531 | } | |
3532 | ||
3533 | static int sd_suspend_common(struct device *dev, bool ignore_stop_errors) | |
3534 | { | |
3535 | struct scsi_disk *sdkp = dev_get_drvdata(dev); | |
3536 | struct scsi_sense_hdr sshdr; | |
3537 | int ret = 0; | |
3538 | ||
3539 | if (!sdkp) /* E.g.: runtime suspend following sd_remove() */ | |
3540 | return 0; | |
3541 | ||
3542 | if (sdkp->WCE && sdkp->media_present) { | |
3543 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); | |
3544 | ret = sd_sync_cache(sdkp, &sshdr); | |
3545 | ||
3546 | if (ret) { | |
3547 | /* ignore OFFLINE device */ | |
3548 | if (ret == -ENODEV) | |
3549 | return 0; | |
3550 | ||
3551 | if (!scsi_sense_valid(&sshdr) || | |
3552 | sshdr.sense_key != ILLEGAL_REQUEST) | |
3553 | return ret; | |
3554 | ||
3555 | /* | |
3556 | * sshdr.sense_key == ILLEGAL_REQUEST means this drive | |
3557 | * doesn't support sync. There's not much to do and | |
3558 | * suspend shouldn't fail. | |
3559 | */ | |
3560 | ret = 0; | |
3561 | } | |
3562 | } | |
3563 | ||
3564 | if (sdkp->device->manage_start_stop) { | |
3565 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); | |
3566 | /* an error is not worth aborting a system sleep */ | |
3567 | ret = sd_start_stop_device(sdkp, 0); | |
3568 | if (ignore_stop_errors) | |
3569 | ret = 0; | |
3570 | } | |
3571 | ||
3572 | return ret; | |
3573 | } | |
3574 | ||
3575 | static int sd_suspend_system(struct device *dev) | |
3576 | { | |
3577 | return sd_suspend_common(dev, true); | |
3578 | } | |
3579 | ||
3580 | static int sd_suspend_runtime(struct device *dev) | |
3581 | { | |
3582 | return sd_suspend_common(dev, false); | |
3583 | } | |
3584 | ||
3585 | static int sd_resume(struct device *dev) | |
3586 | { | |
3587 | struct scsi_disk *sdkp = dev_get_drvdata(dev); | |
3588 | int ret; | |
3589 | ||
3590 | if (!sdkp) /* E.g.: runtime resume at the start of sd_probe() */ | |
3591 | return 0; | |
3592 | ||
3593 | if (!sdkp->device->manage_start_stop) | |
3594 | return 0; | |
3595 | ||
3596 | sd_printk(KERN_NOTICE, sdkp, "Starting disk\n"); | |
3597 | ret = sd_start_stop_device(sdkp, 1); | |
3598 | if (!ret) | |
3599 | opal_unlock_from_suspend(sdkp->opal_dev); | |
3600 | return ret; | |
3601 | } | |
3602 | ||
3603 | /** | |
3604 | * init_sd - entry point for this driver (both when built in or when | |
3605 | * a module). | |
3606 | * | |
3607 | * Note: this function registers this driver with the scsi mid-level. | |
3608 | **/ | |
3609 | static int __init init_sd(void) | |
3610 | { | |
3611 | int majors = 0, i, err; | |
3612 | ||
3613 | SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n")); | |
3614 | ||
3615 | for (i = 0; i < SD_MAJORS; i++) { | |
3616 | if (register_blkdev(sd_major(i), "sd") != 0) | |
3617 | continue; | |
3618 | majors++; | |
3619 | blk_register_region(sd_major(i), SD_MINORS, NULL, | |
3620 | sd_default_probe, NULL, NULL); | |
3621 | } | |
3622 | ||
3623 | if (!majors) | |
3624 | return -ENODEV; | |
3625 | ||
3626 | err = class_register(&sd_disk_class); | |
3627 | if (err) | |
3628 | goto err_out; | |
3629 | ||
3630 | sd_cdb_cache = kmem_cache_create("sd_ext_cdb", SD_EXT_CDB_SIZE, | |
3631 | 0, 0, NULL); | |
3632 | if (!sd_cdb_cache) { | |
3633 | printk(KERN_ERR "sd: can't init extended cdb cache\n"); | |
3634 | err = -ENOMEM; | |
3635 | goto err_out_class; | |
3636 | } | |
3637 | ||
3638 | sd_cdb_pool = mempool_create_slab_pool(SD_MEMPOOL_SIZE, sd_cdb_cache); | |
3639 | if (!sd_cdb_pool) { | |
3640 | printk(KERN_ERR "sd: can't init extended cdb pool\n"); | |
3641 | err = -ENOMEM; | |
3642 | goto err_out_cache; | |
3643 | } | |
3644 | ||
3645 | err = scsi_register_driver(&sd_template.gendrv); | |
3646 | if (err) | |
3647 | goto err_out_driver; | |
3648 | ||
3649 | return 0; | |
3650 | ||
3651 | err_out_driver: | |
3652 | mempool_destroy(sd_cdb_pool); | |
3653 | ||
3654 | err_out_cache: | |
3655 | kmem_cache_destroy(sd_cdb_cache); | |
3656 | ||
3657 | err_out_class: | |
3658 | class_unregister(&sd_disk_class); | |
3659 | err_out: | |
3660 | for (i = 0; i < SD_MAJORS; i++) | |
3661 | unregister_blkdev(sd_major(i), "sd"); | |
3662 | return err; | |
3663 | } | |
3664 | ||
3665 | /** | |
3666 | * exit_sd - exit point for this driver (when it is a module). | |
3667 | * | |
3668 | * Note: this function unregisters this driver from the scsi mid-level. | |
3669 | **/ | |
3670 | static void __exit exit_sd(void) | |
3671 | { | |
3672 | int i; | |
3673 | ||
3674 | SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n")); | |
3675 | ||
3676 | scsi_unregister_driver(&sd_template.gendrv); | |
3677 | mempool_destroy(sd_cdb_pool); | |
3678 | kmem_cache_destroy(sd_cdb_cache); | |
3679 | ||
3680 | class_unregister(&sd_disk_class); | |
3681 | ||
3682 | for (i = 0; i < SD_MAJORS; i++) { | |
3683 | blk_unregister_region(sd_major(i), SD_MINORS); | |
3684 | unregister_blkdev(sd_major(i), "sd"); | |
3685 | } | |
3686 | } | |
3687 | ||
3688 | module_init(init_sd); | |
3689 | module_exit(exit_sd); | |
3690 | ||
3691 | static void sd_print_sense_hdr(struct scsi_disk *sdkp, | |
3692 | struct scsi_sense_hdr *sshdr) | |
3693 | { | |
3694 | scsi_print_sense_hdr(sdkp->device, | |
3695 | sdkp->disk ? sdkp->disk->disk_name : NULL, sshdr); | |
3696 | } | |
3697 | ||
3698 | static void sd_print_result(const struct scsi_disk *sdkp, const char *msg, | |
3699 | int result) | |
3700 | { | |
3701 | const char *hb_string = scsi_hostbyte_string(result); | |
3702 | const char *db_string = scsi_driverbyte_string(result); | |
3703 | ||
3704 | if (hb_string || db_string) | |
3705 | sd_printk(KERN_INFO, sdkp, | |
3706 | "%s: Result: hostbyte=%s driverbyte=%s\n", msg, | |
3707 | hb_string ? hb_string : "invalid", | |
3708 | db_string ? db_string : "invalid"); | |
3709 | else | |
3710 | sd_printk(KERN_INFO, sdkp, | |
3711 | "%s: Result: hostbyte=0x%02x driverbyte=0x%02x\n", | |
3712 | msg, host_byte(result), driver_byte(result)); | |
3713 | } | |
3714 |