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1da177e4 LT |
1 | /* |
2 | * sd.c Copyright (C) 1992 Drew Eckhardt | |
3 | * Copyright (C) 1993, 1994, 1995, 1999 Eric Youngdale | |
4 | * | |
5 | * Linux scsi disk driver | |
6 | * Initial versions: Drew Eckhardt | |
7 | * Subsequent revisions: Eric Youngdale | |
8 | * Modification history: | |
9 | * - Drew Eckhardt <drew@colorado.edu> original | |
10 | * - Eric Youngdale <eric@andante.org> add scatter-gather, multiple | |
11 | * outstanding request, and other enhancements. | |
12 | * Support loadable low-level scsi drivers. | |
13 | * - Jirka Hanika <geo@ff.cuni.cz> support more scsi disks using | |
14 | * eight major numbers. | |
15 | * - Richard Gooch <rgooch@atnf.csiro.au> support devfs. | |
16 | * - Torben Mathiasen <tmm@image.dk> Resource allocation fixes in | |
17 | * sd_init and cleanups. | |
18 | * - Alex Davis <letmein@erols.com> Fix problem where partition info | |
19 | * not being read in sd_open. Fix problem where removable media | |
20 | * could be ejected after sd_open. | |
21 | * - Douglas Gilbert <dgilbert@interlog.com> cleanup for lk 2.5.x | |
22 | * - Badari Pulavarty <pbadari@us.ibm.com>, Matthew Wilcox | |
23 | * <willy@debian.org>, Kurt Garloff <garloff@suse.de>: | |
24 | * Support 32k/1M disks. | |
25 | * | |
26 | * Logging policy (needs CONFIG_SCSI_LOGGING defined): | |
27 | * - setting up transfer: SCSI_LOG_HLQUEUE levels 1 and 2 | |
28 | * - end of transfer (bh + scsi_lib): SCSI_LOG_HLCOMPLETE level 1 | |
29 | * - entering sd_ioctl: SCSI_LOG_IOCTL level 1 | |
30 | * - entering other commands: SCSI_LOG_HLQUEUE level 3 | |
31 | * Note: when the logging level is set by the user, it must be greater | |
32 | * than the level indicated above to trigger output. | |
33 | */ | |
34 | ||
1da177e4 LT |
35 | #include <linux/module.h> |
36 | #include <linux/fs.h> | |
37 | #include <linux/kernel.h> | |
1da177e4 LT |
38 | #include <linux/mm.h> |
39 | #include <linux/bio.h> | |
40 | #include <linux/genhd.h> | |
41 | #include <linux/hdreg.h> | |
42 | #include <linux/errno.h> | |
43 | #include <linux/idr.h> | |
44 | #include <linux/interrupt.h> | |
45 | #include <linux/init.h> | |
46 | #include <linux/blkdev.h> | |
47 | #include <linux/blkpg.h> | |
1da177e4 | 48 | #include <linux/delay.h> |
0b950672 | 49 | #include <linux/mutex.h> |
7404ad3b | 50 | #include <linux/string_helpers.h> |
4ace92fc | 51 | #include <linux/async.h> |
5a0e3ad6 | 52 | #include <linux/slab.h> |
1da177e4 | 53 | #include <asm/uaccess.h> |
8f76d151 | 54 | #include <asm/unaligned.h> |
1da177e4 LT |
55 | |
56 | #include <scsi/scsi.h> | |
57 | #include <scsi/scsi_cmnd.h> | |
58 | #include <scsi/scsi_dbg.h> | |
59 | #include <scsi/scsi_device.h> | |
60 | #include <scsi/scsi_driver.h> | |
61 | #include <scsi/scsi_eh.h> | |
62 | #include <scsi/scsi_host.h> | |
63 | #include <scsi/scsi_ioctl.h> | |
1da177e4 LT |
64 | #include <scsi/scsicam.h> |
65 | ||
aa91696e | 66 | #include "sd.h" |
1da177e4 LT |
67 | #include "scsi_logging.h" |
68 | ||
f018fa55 RH |
69 | MODULE_AUTHOR("Eric Youngdale"); |
70 | MODULE_DESCRIPTION("SCSI disk (sd) driver"); | |
71 | MODULE_LICENSE("GPL"); | |
72 | ||
73 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK0_MAJOR); | |
74 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK1_MAJOR); | |
75 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK2_MAJOR); | |
76 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK3_MAJOR); | |
77 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK4_MAJOR); | |
78 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK5_MAJOR); | |
79 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK6_MAJOR); | |
80 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK7_MAJOR); | |
81 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK8_MAJOR); | |
82 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK9_MAJOR); | |
83 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK10_MAJOR); | |
84 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK11_MAJOR); | |
85 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK12_MAJOR); | |
86 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK13_MAJOR); | |
87 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK14_MAJOR); | |
88 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK15_MAJOR); | |
d7b8bcb0 MT |
89 | MODULE_ALIAS_SCSI_DEVICE(TYPE_DISK); |
90 | MODULE_ALIAS_SCSI_DEVICE(TYPE_MOD); | |
91 | MODULE_ALIAS_SCSI_DEVICE(TYPE_RBC); | |
f018fa55 | 92 | |
870d6656 | 93 | #if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT) |
f615b48c | 94 | #define SD_MINORS 16 |
870d6656 | 95 | #else |
3e1a7ff8 | 96 | #define SD_MINORS 0 |
870d6656 TH |
97 | #endif |
98 | ||
c98a0eb0 | 99 | static void sd_config_discard(struct scsi_disk *, unsigned int); |
7b3d9545 | 100 | static int sd_revalidate_disk(struct gendisk *); |
72ec24bd | 101 | static void sd_unlock_native_capacity(struct gendisk *disk); |
7b3d9545 LT |
102 | static int sd_probe(struct device *); |
103 | static int sd_remove(struct device *); | |
104 | static void sd_shutdown(struct device *); | |
105 | static int sd_suspend(struct device *, pm_message_t state); | |
106 | static int sd_resume(struct device *); | |
107 | static void sd_rescan(struct device *); | |
108 | static int sd_done(struct scsi_cmnd *); | |
109 | static void sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer); | |
ee959b00 | 110 | static void scsi_disk_release(struct device *cdev); |
7b3d9545 LT |
111 | static void sd_print_sense_hdr(struct scsi_disk *, struct scsi_sense_hdr *); |
112 | static void sd_print_result(struct scsi_disk *, int); | |
113 | ||
4034cc68 | 114 | static DEFINE_SPINLOCK(sd_index_lock); |
f27bac27 | 115 | static DEFINE_IDA(sd_index_ida); |
1da177e4 LT |
116 | |
117 | /* This semaphore is used to mediate the 0->1 reference get in the | |
118 | * face of object destruction (i.e. we can't allow a get on an | |
119 | * object after last put) */ | |
0b950672 | 120 | static DEFINE_MUTEX(sd_ref_mutex); |
1da177e4 | 121 | |
439d77f7 HS |
122 | static struct kmem_cache *sd_cdb_cache; |
123 | static mempool_t *sd_cdb_pool; | |
4e7392ec | 124 | |
6bdaa1f1 JB |
125 | static const char *sd_cache_types[] = { |
126 | "write through", "none", "write back", | |
127 | "write back, no read (daft)" | |
128 | }; | |
129 | ||
ee959b00 TJ |
130 | static ssize_t |
131 | sd_store_cache_type(struct device *dev, struct device_attribute *attr, | |
132 | const char *buf, size_t count) | |
6bdaa1f1 JB |
133 | { |
134 | int i, ct = -1, rcd, wce, sp; | |
ee959b00 | 135 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
136 | struct scsi_device *sdp = sdkp->device; |
137 | char buffer[64]; | |
138 | char *buffer_data; | |
139 | struct scsi_mode_data data; | |
140 | struct scsi_sense_hdr sshdr; | |
141 | int len; | |
142 | ||
143 | if (sdp->type != TYPE_DISK) | |
144 | /* no cache control on RBC devices; theoretically they | |
145 | * can do it, but there's probably so many exceptions | |
146 | * it's not worth the risk */ | |
147 | return -EINVAL; | |
148 | ||
6391a113 | 149 | for (i = 0; i < ARRAY_SIZE(sd_cache_types); i++) { |
439d77f7 | 150 | len = strlen(sd_cache_types[i]); |
6bdaa1f1 JB |
151 | if (strncmp(sd_cache_types[i], buf, len) == 0 && |
152 | buf[len] == '\n') { | |
153 | ct = i; | |
154 | break; | |
155 | } | |
156 | } | |
157 | if (ct < 0) | |
158 | return -EINVAL; | |
159 | rcd = ct & 0x01 ? 1 : 0; | |
160 | wce = ct & 0x02 ? 1 : 0; | |
161 | if (scsi_mode_sense(sdp, 0x08, 8, buffer, sizeof(buffer), SD_TIMEOUT, | |
162 | SD_MAX_RETRIES, &data, NULL)) | |
163 | return -EINVAL; | |
a9312fb8 | 164 | len = min_t(size_t, sizeof(buffer), data.length - data.header_length - |
6bdaa1f1 JB |
165 | data.block_descriptor_length); |
166 | buffer_data = buffer + data.header_length + | |
167 | data.block_descriptor_length; | |
168 | buffer_data[2] &= ~0x05; | |
169 | buffer_data[2] |= wce << 2 | rcd; | |
170 | sp = buffer_data[0] & 0x80 ? 1 : 0; | |
171 | ||
172 | if (scsi_mode_select(sdp, 1, sp, 8, buffer_data, len, SD_TIMEOUT, | |
173 | SD_MAX_RETRIES, &data, &sshdr)) { | |
174 | if (scsi_sense_valid(&sshdr)) | |
e73aec82 | 175 | sd_print_sense_hdr(sdkp, &sshdr); |
6bdaa1f1 JB |
176 | return -EINVAL; |
177 | } | |
f98a8cae | 178 | revalidate_disk(sdkp->disk); |
6bdaa1f1 JB |
179 | return count; |
180 | } | |
181 | ||
ee959b00 TJ |
182 | static ssize_t |
183 | sd_store_manage_start_stop(struct device *dev, struct device_attribute *attr, | |
184 | const char *buf, size_t count) | |
c3c94c5a | 185 | { |
ee959b00 | 186 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
c3c94c5a TH |
187 | struct scsi_device *sdp = sdkp->device; |
188 | ||
189 | if (!capable(CAP_SYS_ADMIN)) | |
190 | return -EACCES; | |
191 | ||
192 | sdp->manage_start_stop = simple_strtoul(buf, NULL, 10); | |
193 | ||
194 | return count; | |
195 | } | |
196 | ||
ee959b00 TJ |
197 | static ssize_t |
198 | sd_store_allow_restart(struct device *dev, struct device_attribute *attr, | |
199 | const char *buf, size_t count) | |
a144c5ae | 200 | { |
ee959b00 | 201 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
a144c5ae BK |
202 | struct scsi_device *sdp = sdkp->device; |
203 | ||
204 | if (!capable(CAP_SYS_ADMIN)) | |
205 | return -EACCES; | |
206 | ||
207 | if (sdp->type != TYPE_DISK) | |
208 | return -EINVAL; | |
209 | ||
210 | sdp->allow_restart = simple_strtoul(buf, NULL, 10); | |
211 | ||
212 | return count; | |
213 | } | |
214 | ||
ee959b00 TJ |
215 | static ssize_t |
216 | sd_show_cache_type(struct device *dev, struct device_attribute *attr, | |
217 | char *buf) | |
6bdaa1f1 | 218 | { |
ee959b00 | 219 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
220 | int ct = sdkp->RCD + 2*sdkp->WCE; |
221 | ||
222 | return snprintf(buf, 40, "%s\n", sd_cache_types[ct]); | |
223 | } | |
224 | ||
ee959b00 TJ |
225 | static ssize_t |
226 | sd_show_fua(struct device *dev, struct device_attribute *attr, char *buf) | |
6bdaa1f1 | 227 | { |
ee959b00 | 228 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
229 | |
230 | return snprintf(buf, 20, "%u\n", sdkp->DPOFUA); | |
231 | } | |
232 | ||
ee959b00 TJ |
233 | static ssize_t |
234 | sd_show_manage_start_stop(struct device *dev, struct device_attribute *attr, | |
235 | char *buf) | |
c3c94c5a | 236 | { |
ee959b00 | 237 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
c3c94c5a TH |
238 | struct scsi_device *sdp = sdkp->device; |
239 | ||
240 | return snprintf(buf, 20, "%u\n", sdp->manage_start_stop); | |
241 | } | |
242 | ||
ee959b00 TJ |
243 | static ssize_t |
244 | sd_show_allow_restart(struct device *dev, struct device_attribute *attr, | |
245 | char *buf) | |
a144c5ae | 246 | { |
ee959b00 | 247 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
a144c5ae BK |
248 | |
249 | return snprintf(buf, 40, "%d\n", sdkp->device->allow_restart); | |
250 | } | |
251 | ||
e0597d70 MP |
252 | static ssize_t |
253 | sd_show_protection_type(struct device *dev, struct device_attribute *attr, | |
254 | char *buf) | |
255 | { | |
256 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
257 | ||
258 | return snprintf(buf, 20, "%u\n", sdkp->protection_type); | |
259 | } | |
260 | ||
518fa8e3 MP |
261 | static ssize_t |
262 | sd_show_protection_mode(struct device *dev, struct device_attribute *attr, | |
263 | char *buf) | |
264 | { | |
265 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
266 | struct scsi_device *sdp = sdkp->device; | |
267 | unsigned int dif, dix; | |
268 | ||
269 | dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type); | |
270 | dix = scsi_host_dix_capable(sdp->host, sdkp->protection_type); | |
271 | ||
272 | if (!dix && scsi_host_dix_capable(sdp->host, SD_DIF_TYPE0_PROTECTION)) { | |
273 | dif = 0; | |
274 | dix = 1; | |
275 | } | |
276 | ||
277 | if (!dif && !dix) | |
278 | return snprintf(buf, 20, "none\n"); | |
279 | ||
280 | return snprintf(buf, 20, "%s%u\n", dix ? "dix" : "dif", dif); | |
281 | } | |
282 | ||
e0597d70 MP |
283 | static ssize_t |
284 | sd_show_app_tag_own(struct device *dev, struct device_attribute *attr, | |
285 | char *buf) | |
286 | { | |
287 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
288 | ||
289 | return snprintf(buf, 20, "%u\n", sdkp->ATO); | |
290 | } | |
291 | ||
e339c1a7 MP |
292 | static ssize_t |
293 | sd_show_thin_provisioning(struct device *dev, struct device_attribute *attr, | |
294 | char *buf) | |
295 | { | |
296 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
297 | ||
c98a0eb0 MP |
298 | return snprintf(buf, 20, "%u\n", sdkp->lbpme); |
299 | } | |
300 | ||
301 | static const char *lbp_mode[] = { | |
302 | [SD_LBP_FULL] = "full", | |
303 | [SD_LBP_UNMAP] = "unmap", | |
304 | [SD_LBP_WS16] = "writesame_16", | |
305 | [SD_LBP_WS10] = "writesame_10", | |
306 | [SD_LBP_ZERO] = "writesame_zero", | |
307 | [SD_LBP_DISABLE] = "disabled", | |
308 | }; | |
309 | ||
310 | static ssize_t | |
311 | sd_show_provisioning_mode(struct device *dev, struct device_attribute *attr, | |
312 | char *buf) | |
313 | { | |
314 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
315 | ||
316 | return snprintf(buf, 20, "%s\n", lbp_mode[sdkp->provisioning_mode]); | |
317 | } | |
318 | ||
319 | static ssize_t | |
320 | sd_store_provisioning_mode(struct device *dev, struct device_attribute *attr, | |
321 | const char *buf, size_t count) | |
322 | { | |
323 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
324 | struct scsi_device *sdp = sdkp->device; | |
325 | ||
326 | if (!capable(CAP_SYS_ADMIN)) | |
327 | return -EACCES; | |
328 | ||
329 | if (sdp->type != TYPE_DISK) | |
330 | return -EINVAL; | |
331 | ||
332 | if (!strncmp(buf, lbp_mode[SD_LBP_UNMAP], 20)) | |
333 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
334 | else if (!strncmp(buf, lbp_mode[SD_LBP_WS16], 20)) | |
335 | sd_config_discard(sdkp, SD_LBP_WS16); | |
336 | else if (!strncmp(buf, lbp_mode[SD_LBP_WS10], 20)) | |
337 | sd_config_discard(sdkp, SD_LBP_WS10); | |
338 | else if (!strncmp(buf, lbp_mode[SD_LBP_ZERO], 20)) | |
339 | sd_config_discard(sdkp, SD_LBP_ZERO); | |
340 | else if (!strncmp(buf, lbp_mode[SD_LBP_DISABLE], 20)) | |
341 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
342 | else | |
343 | return -EINVAL; | |
344 | ||
345 | return count; | |
e339c1a7 MP |
346 | } |
347 | ||
ee959b00 | 348 | static struct device_attribute sd_disk_attrs[] = { |
6bdaa1f1 JB |
349 | __ATTR(cache_type, S_IRUGO|S_IWUSR, sd_show_cache_type, |
350 | sd_store_cache_type), | |
351 | __ATTR(FUA, S_IRUGO, sd_show_fua, NULL), | |
a144c5ae BK |
352 | __ATTR(allow_restart, S_IRUGO|S_IWUSR, sd_show_allow_restart, |
353 | sd_store_allow_restart), | |
c3c94c5a TH |
354 | __ATTR(manage_start_stop, S_IRUGO|S_IWUSR, sd_show_manage_start_stop, |
355 | sd_store_manage_start_stop), | |
e0597d70 | 356 | __ATTR(protection_type, S_IRUGO, sd_show_protection_type, NULL), |
518fa8e3 | 357 | __ATTR(protection_mode, S_IRUGO, sd_show_protection_mode, NULL), |
e0597d70 | 358 | __ATTR(app_tag_own, S_IRUGO, sd_show_app_tag_own, NULL), |
e339c1a7 | 359 | __ATTR(thin_provisioning, S_IRUGO, sd_show_thin_provisioning, NULL), |
c98a0eb0 MP |
360 | __ATTR(provisioning_mode, S_IRUGO|S_IWUSR, sd_show_provisioning_mode, |
361 | sd_store_provisioning_mode), | |
6bdaa1f1 JB |
362 | __ATTR_NULL, |
363 | }; | |
364 | ||
365 | static struct class sd_disk_class = { | |
366 | .name = "scsi_disk", | |
367 | .owner = THIS_MODULE, | |
ee959b00 TJ |
368 | .dev_release = scsi_disk_release, |
369 | .dev_attrs = sd_disk_attrs, | |
6bdaa1f1 | 370 | }; |
1da177e4 LT |
371 | |
372 | static struct scsi_driver sd_template = { | |
373 | .owner = THIS_MODULE, | |
374 | .gendrv = { | |
375 | .name = "sd", | |
376 | .probe = sd_probe, | |
377 | .remove = sd_remove, | |
c3c94c5a TH |
378 | .suspend = sd_suspend, |
379 | .resume = sd_resume, | |
1da177e4 LT |
380 | .shutdown = sd_shutdown, |
381 | }, | |
382 | .rescan = sd_rescan, | |
7b3d9545 | 383 | .done = sd_done, |
1da177e4 LT |
384 | }; |
385 | ||
386 | /* | |
387 | * Device no to disk mapping: | |
388 | * | |
389 | * major disc2 disc p1 | |
390 | * |............|.............|....|....| <- dev_t | |
391 | * 31 20 19 8 7 4 3 0 | |
392 | * | |
393 | * Inside a major, we have 16k disks, however mapped non- | |
394 | * contiguously. The first 16 disks are for major0, the next | |
395 | * ones with major1, ... Disk 256 is for major0 again, disk 272 | |
396 | * for major1, ... | |
397 | * As we stay compatible with our numbering scheme, we can reuse | |
398 | * the well-know SCSI majors 8, 65--71, 136--143. | |
399 | */ | |
400 | static int sd_major(int major_idx) | |
401 | { | |
402 | switch (major_idx) { | |
403 | case 0: | |
404 | return SCSI_DISK0_MAJOR; | |
405 | case 1 ... 7: | |
406 | return SCSI_DISK1_MAJOR + major_idx - 1; | |
407 | case 8 ... 15: | |
408 | return SCSI_DISK8_MAJOR + major_idx - 8; | |
409 | default: | |
410 | BUG(); | |
411 | return 0; /* shut up gcc */ | |
412 | } | |
413 | } | |
414 | ||
39b7f1e2 | 415 | static struct scsi_disk *__scsi_disk_get(struct gendisk *disk) |
1da177e4 LT |
416 | { |
417 | struct scsi_disk *sdkp = NULL; | |
418 | ||
39b7f1e2 AS |
419 | if (disk->private_data) { |
420 | sdkp = scsi_disk(disk); | |
421 | if (scsi_device_get(sdkp->device) == 0) | |
ee959b00 | 422 | get_device(&sdkp->dev); |
39b7f1e2 AS |
423 | else |
424 | sdkp = NULL; | |
425 | } | |
426 | return sdkp; | |
427 | } | |
428 | ||
429 | static struct scsi_disk *scsi_disk_get(struct gendisk *disk) | |
430 | { | |
431 | struct scsi_disk *sdkp; | |
432 | ||
0b950672 | 433 | mutex_lock(&sd_ref_mutex); |
39b7f1e2 | 434 | sdkp = __scsi_disk_get(disk); |
0b950672 | 435 | mutex_unlock(&sd_ref_mutex); |
1da177e4 | 436 | return sdkp; |
39b7f1e2 | 437 | } |
1da177e4 | 438 | |
39b7f1e2 AS |
439 | static struct scsi_disk *scsi_disk_get_from_dev(struct device *dev) |
440 | { | |
441 | struct scsi_disk *sdkp; | |
442 | ||
0b950672 | 443 | mutex_lock(&sd_ref_mutex); |
39b7f1e2 AS |
444 | sdkp = dev_get_drvdata(dev); |
445 | if (sdkp) | |
446 | sdkp = __scsi_disk_get(sdkp->disk); | |
0b950672 | 447 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
448 | return sdkp; |
449 | } | |
450 | ||
451 | static void scsi_disk_put(struct scsi_disk *sdkp) | |
452 | { | |
453 | struct scsi_device *sdev = sdkp->device; | |
454 | ||
0b950672 | 455 | mutex_lock(&sd_ref_mutex); |
ee959b00 | 456 | put_device(&sdkp->dev); |
1da177e4 | 457 | scsi_device_put(sdev); |
0b950672 | 458 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
459 | } |
460 | ||
35e1a5d9 MP |
461 | static void sd_prot_op(struct scsi_cmnd *scmd, unsigned int dif) |
462 | { | |
463 | unsigned int prot_op = SCSI_PROT_NORMAL; | |
464 | unsigned int dix = scsi_prot_sg_count(scmd); | |
465 | ||
466 | if (scmd->sc_data_direction == DMA_FROM_DEVICE) { | |
467 | if (dif && dix) | |
468 | prot_op = SCSI_PROT_READ_PASS; | |
469 | else if (dif && !dix) | |
470 | prot_op = SCSI_PROT_READ_STRIP; | |
471 | else if (!dif && dix) | |
472 | prot_op = SCSI_PROT_READ_INSERT; | |
473 | } else { | |
474 | if (dif && dix) | |
475 | prot_op = SCSI_PROT_WRITE_PASS; | |
476 | else if (dif && !dix) | |
477 | prot_op = SCSI_PROT_WRITE_INSERT; | |
478 | else if (!dif && dix) | |
479 | prot_op = SCSI_PROT_WRITE_STRIP; | |
480 | } | |
481 | ||
482 | scsi_set_prot_op(scmd, prot_op); | |
483 | scsi_set_prot_type(scmd, dif); | |
484 | } | |
485 | ||
c98a0eb0 MP |
486 | static void sd_config_discard(struct scsi_disk *sdkp, unsigned int mode) |
487 | { | |
488 | struct request_queue *q = sdkp->disk->queue; | |
489 | unsigned int logical_block_size = sdkp->device->sector_size; | |
490 | unsigned int max_blocks = 0; | |
491 | ||
492 | q->limits.discard_zeroes_data = sdkp->lbprz; | |
2a8cfad0 MP |
493 | q->limits.discard_alignment = sdkp->unmap_alignment * |
494 | logical_block_size; | |
c98a0eb0 MP |
495 | q->limits.discard_granularity = |
496 | max(sdkp->physical_block_size, | |
497 | sdkp->unmap_granularity * logical_block_size); | |
498 | ||
499 | switch (mode) { | |
500 | ||
501 | case SD_LBP_DISABLE: | |
502 | q->limits.max_discard_sectors = 0; | |
503 | queue_flag_clear_unlocked(QUEUE_FLAG_DISCARD, q); | |
504 | return; | |
505 | ||
506 | case SD_LBP_UNMAP: | |
507 | max_blocks = min_not_zero(sdkp->max_unmap_blocks, 0xffffffff); | |
508 | break; | |
509 | ||
510 | case SD_LBP_WS16: | |
511 | max_blocks = min_not_zero(sdkp->max_ws_blocks, 0xffffffff); | |
512 | break; | |
513 | ||
514 | case SD_LBP_WS10: | |
515 | max_blocks = min_not_zero(sdkp->max_ws_blocks, (u32)0xffff); | |
516 | break; | |
517 | ||
518 | case SD_LBP_ZERO: | |
519 | max_blocks = min_not_zero(sdkp->max_ws_blocks, (u32)0xffff); | |
520 | q->limits.discard_zeroes_data = 1; | |
521 | break; | |
522 | } | |
523 | ||
524 | q->limits.max_discard_sectors = max_blocks * (logical_block_size >> 9); | |
525 | queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, q); | |
526 | ||
527 | sdkp->provisioning_mode = mode; | |
528 | } | |
529 | ||
e339c1a7 | 530 | /** |
66ac0280 CH |
531 | * scsi_setup_discard_cmnd - unmap blocks on thinly provisioned device |
532 | * @sdp: scsi device to operate one | |
e339c1a7 MP |
533 | * @rq: Request to prepare |
534 | * | |
535 | * Will issue either UNMAP or WRITE SAME(16) depending on preference | |
536 | * indicated by target device. | |
537 | **/ | |
66ac0280 | 538 | static int scsi_setup_discard_cmnd(struct scsi_device *sdp, struct request *rq) |
e339c1a7 MP |
539 | { |
540 | struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); | |
541 | struct bio *bio = rq->bio; | |
542 | sector_t sector = bio->bi_sector; | |
66ac0280 CH |
543 | unsigned int nr_sectors = bio_sectors(bio); |
544 | unsigned int len; | |
f1126e95 | 545 | int ret; |
c98a0eb0 | 546 | char *buf; |
66ac0280 | 547 | struct page *page; |
e339c1a7 MP |
548 | |
549 | if (sdkp->device->sector_size == 4096) { | |
550 | sector >>= 3; | |
66ac0280 | 551 | nr_sectors >>= 3; |
e339c1a7 MP |
552 | } |
553 | ||
e339c1a7 MP |
554 | rq->timeout = SD_TIMEOUT; |
555 | ||
556 | memset(rq->cmd, 0, rq->cmd_len); | |
557 | ||
66ac0280 CH |
558 | page = alloc_page(GFP_ATOMIC | __GFP_ZERO); |
559 | if (!page) | |
560 | return BLKPREP_DEFER; | |
561 | ||
c98a0eb0 MP |
562 | switch (sdkp->provisioning_mode) { |
563 | case SD_LBP_UNMAP: | |
564 | buf = page_address(page); | |
e339c1a7 | 565 | |
66ac0280 | 566 | rq->cmd_len = 10; |
e339c1a7 MP |
567 | rq->cmd[0] = UNMAP; |
568 | rq->cmd[8] = 24; | |
e339c1a7 MP |
569 | |
570 | put_unaligned_be16(6 + 16, &buf[0]); | |
571 | put_unaligned_be16(16, &buf[2]); | |
572 | put_unaligned_be64(sector, &buf[8]); | |
66ac0280 | 573 | put_unaligned_be32(nr_sectors, &buf[16]); |
e339c1a7 | 574 | |
66ac0280 | 575 | len = 24; |
c98a0eb0 MP |
576 | break; |
577 | ||
578 | case SD_LBP_WS16: | |
66ac0280 | 579 | rq->cmd_len = 16; |
e339c1a7 MP |
580 | rq->cmd[0] = WRITE_SAME_16; |
581 | rq->cmd[1] = 0x8; /* UNMAP */ | |
582 | put_unaligned_be64(sector, &rq->cmd[2]); | |
66ac0280 CH |
583 | put_unaligned_be32(nr_sectors, &rq->cmd[10]); |
584 | ||
585 | len = sdkp->device->sector_size; | |
c98a0eb0 MP |
586 | break; |
587 | ||
588 | case SD_LBP_WS10: | |
589 | case SD_LBP_ZERO: | |
590 | rq->cmd_len = 10; | |
591 | rq->cmd[0] = WRITE_SAME; | |
592 | if (sdkp->provisioning_mode == SD_LBP_WS10) | |
593 | rq->cmd[1] = 0x8; /* UNMAP */ | |
594 | put_unaligned_be32(sector, &rq->cmd[2]); | |
595 | put_unaligned_be16(nr_sectors, &rq->cmd[7]); | |
596 | ||
597 | len = sdkp->device->sector_size; | |
598 | break; | |
599 | ||
600 | default: | |
09b9cc44 | 601 | ret = BLKPREP_KILL; |
c98a0eb0 | 602 | goto out; |
e339c1a7 MP |
603 | } |
604 | ||
66ac0280 | 605 | blk_add_request_payload(rq, page, len); |
f1126e95 FT |
606 | ret = scsi_setup_blk_pc_cmnd(sdp, rq); |
607 | rq->buffer = page_address(page); | |
c98a0eb0 MP |
608 | |
609 | out: | |
610a6349 FT |
610 | if (ret != BLKPREP_OK) { |
611 | __free_page(page); | |
612 | rq->buffer = NULL; | |
613 | } | |
f1126e95 FT |
614 | return ret; |
615 | } | |
616 | ||
90467c29 FT |
617 | static int scsi_setup_flush_cmnd(struct scsi_device *sdp, struct request *rq) |
618 | { | |
e3b3e624 | 619 | rq->timeout = SD_FLUSH_TIMEOUT; |
90467c29 FT |
620 | rq->retries = SD_MAX_RETRIES; |
621 | rq->cmd[0] = SYNCHRONIZE_CACHE; | |
622 | rq->cmd_len = 10; | |
623 | ||
624 | return scsi_setup_blk_pc_cmnd(sdp, rq); | |
625 | } | |
626 | ||
f1126e95 FT |
627 | static void sd_unprep_fn(struct request_queue *q, struct request *rq) |
628 | { | |
610a6349 FT |
629 | if (rq->cmd_flags & REQ_DISCARD) { |
630 | free_page((unsigned long)rq->buffer); | |
631 | rq->buffer = NULL; | |
632 | } | |
e339c1a7 MP |
633 | } |
634 | ||
1da177e4 LT |
635 | /** |
636 | * sd_init_command - build a scsi (read or write) command from | |
637 | * information in the request structure. | |
638 | * @SCpnt: pointer to mid-level's per scsi command structure that | |
639 | * contains request and into which the scsi command is written | |
640 | * | |
641 | * Returns 1 if successful and 0 if error (or cannot be done now). | |
642 | **/ | |
7f9a6bc4 | 643 | static int sd_prep_fn(struct request_queue *q, struct request *rq) |
1da177e4 | 644 | { |
7f9a6bc4 JB |
645 | struct scsi_cmnd *SCpnt; |
646 | struct scsi_device *sdp = q->queuedata; | |
776b23a0 | 647 | struct gendisk *disk = rq->rq_disk; |
af55ff67 | 648 | struct scsi_disk *sdkp; |
83096ebf | 649 | sector_t block = blk_rq_pos(rq); |
18351070 | 650 | sector_t threshold; |
83096ebf | 651 | unsigned int this_count = blk_rq_sectors(rq); |
bd623e79 | 652 | int ret, host_dif; |
4e7392ec | 653 | unsigned char protect; |
7f9a6bc4 | 654 | |
e339c1a7 MP |
655 | /* |
656 | * Discard request come in as REQ_TYPE_FS but we turn them into | |
657 | * block PC requests to make life easier. | |
658 | */ | |
66ac0280 CH |
659 | if (rq->cmd_flags & REQ_DISCARD) { |
660 | ret = scsi_setup_discard_cmnd(sdp, rq); | |
661 | goto out; | |
90467c29 FT |
662 | } else if (rq->cmd_flags & REQ_FLUSH) { |
663 | ret = scsi_setup_flush_cmnd(sdp, rq); | |
664 | goto out; | |
66ac0280 | 665 | } else if (rq->cmd_type == REQ_TYPE_BLOCK_PC) { |
7f9a6bc4 JB |
666 | ret = scsi_setup_blk_pc_cmnd(sdp, rq); |
667 | goto out; | |
668 | } else if (rq->cmd_type != REQ_TYPE_FS) { | |
669 | ret = BLKPREP_KILL; | |
670 | goto out; | |
671 | } | |
672 | ret = scsi_setup_fs_cmnd(sdp, rq); | |
673 | if (ret != BLKPREP_OK) | |
674 | goto out; | |
675 | SCpnt = rq->special; | |
af55ff67 | 676 | sdkp = scsi_disk(disk); |
7f9a6bc4 JB |
677 | |
678 | /* from here on until we're complete, any goto out | |
679 | * is used for a killable error condition */ | |
680 | ret = BLKPREP_KILL; | |
1da177e4 | 681 | |
fa0d34be MP |
682 | SCSI_LOG_HLQUEUE(1, scmd_printk(KERN_INFO, SCpnt, |
683 | "sd_init_command: block=%llu, " | |
684 | "count=%d\n", | |
685 | (unsigned long long)block, | |
686 | this_count)); | |
1da177e4 LT |
687 | |
688 | if (!sdp || !scsi_device_online(sdp) || | |
83096ebf | 689 | block + blk_rq_sectors(rq) > get_capacity(disk)) { |
fa0d34be | 690 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
83096ebf TH |
691 | "Finishing %u sectors\n", |
692 | blk_rq_sectors(rq))); | |
fa0d34be MP |
693 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
694 | "Retry with 0x%p\n", SCpnt)); | |
7f9a6bc4 | 695 | goto out; |
1da177e4 LT |
696 | } |
697 | ||
698 | if (sdp->changed) { | |
699 | /* | |
700 | * quietly refuse to do anything to a changed disc until | |
701 | * the changed bit has been reset | |
702 | */ | |
3ff5588d | 703 | /* printk("SCSI disk has been changed or is not present. Prohibiting further I/O.\n"); */ |
7f9a6bc4 | 704 | goto out; |
1da177e4 | 705 | } |
7f9a6bc4 | 706 | |
a0899d4d | 707 | /* |
18351070 LT |
708 | * Some SD card readers can't handle multi-sector accesses which touch |
709 | * the last one or two hardware sectors. Split accesses as needed. | |
a0899d4d | 710 | */ |
18351070 LT |
711 | threshold = get_capacity(disk) - SD_LAST_BUGGY_SECTORS * |
712 | (sdp->sector_size / 512); | |
713 | ||
714 | if (unlikely(sdp->last_sector_bug && block + this_count > threshold)) { | |
715 | if (block < threshold) { | |
716 | /* Access up to the threshold but not beyond */ | |
717 | this_count = threshold - block; | |
718 | } else { | |
719 | /* Access only a single hardware sector */ | |
720 | this_count = sdp->sector_size / 512; | |
721 | } | |
722 | } | |
a0899d4d | 723 | |
fa0d34be MP |
724 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, "block=%llu\n", |
725 | (unsigned long long)block)); | |
1da177e4 LT |
726 | |
727 | /* | |
728 | * If we have a 1K hardware sectorsize, prevent access to single | |
729 | * 512 byte sectors. In theory we could handle this - in fact | |
730 | * the scsi cdrom driver must be able to handle this because | |
731 | * we typically use 1K blocksizes, and cdroms typically have | |
732 | * 2K hardware sectorsizes. Of course, things are simpler | |
733 | * with the cdrom, since it is read-only. For performance | |
734 | * reasons, the filesystems should be able to handle this | |
735 | * and not force the scsi disk driver to use bounce buffers | |
736 | * for this. | |
737 | */ | |
738 | if (sdp->sector_size == 1024) { | |
83096ebf | 739 | if ((block & 1) || (blk_rq_sectors(rq) & 1)) { |
e73aec82 MP |
740 | scmd_printk(KERN_ERR, SCpnt, |
741 | "Bad block number requested\n"); | |
7f9a6bc4 | 742 | goto out; |
1da177e4 LT |
743 | } else { |
744 | block = block >> 1; | |
745 | this_count = this_count >> 1; | |
746 | } | |
747 | } | |
748 | if (sdp->sector_size == 2048) { | |
83096ebf | 749 | if ((block & 3) || (blk_rq_sectors(rq) & 3)) { |
e73aec82 MP |
750 | scmd_printk(KERN_ERR, SCpnt, |
751 | "Bad block number requested\n"); | |
7f9a6bc4 | 752 | goto out; |
1da177e4 LT |
753 | } else { |
754 | block = block >> 2; | |
755 | this_count = this_count >> 2; | |
756 | } | |
757 | } | |
758 | if (sdp->sector_size == 4096) { | |
83096ebf | 759 | if ((block & 7) || (blk_rq_sectors(rq) & 7)) { |
e73aec82 MP |
760 | scmd_printk(KERN_ERR, SCpnt, |
761 | "Bad block number requested\n"); | |
7f9a6bc4 | 762 | goto out; |
1da177e4 LT |
763 | } else { |
764 | block = block >> 3; | |
765 | this_count = this_count >> 3; | |
766 | } | |
767 | } | |
768 | if (rq_data_dir(rq) == WRITE) { | |
769 | if (!sdp->writeable) { | |
7f9a6bc4 | 770 | goto out; |
1da177e4 LT |
771 | } |
772 | SCpnt->cmnd[0] = WRITE_6; | |
773 | SCpnt->sc_data_direction = DMA_TO_DEVICE; | |
af55ff67 MP |
774 | |
775 | if (blk_integrity_rq(rq) && | |
776 | sd_dif_prepare(rq, block, sdp->sector_size) == -EIO) | |
777 | goto out; | |
778 | ||
1da177e4 LT |
779 | } else if (rq_data_dir(rq) == READ) { |
780 | SCpnt->cmnd[0] = READ_6; | |
781 | SCpnt->sc_data_direction = DMA_FROM_DEVICE; | |
782 | } else { | |
e73aec82 | 783 | scmd_printk(KERN_ERR, SCpnt, "Unknown command %x\n", rq->cmd_flags); |
7f9a6bc4 | 784 | goto out; |
1da177e4 LT |
785 | } |
786 | ||
fa0d34be | 787 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
83096ebf | 788 | "%s %d/%u 512 byte blocks.\n", |
fa0d34be MP |
789 | (rq_data_dir(rq) == WRITE) ? |
790 | "writing" : "reading", this_count, | |
83096ebf | 791 | blk_rq_sectors(rq))); |
1da177e4 | 792 | |
af55ff67 | 793 | /* Set RDPROTECT/WRPROTECT if disk is formatted with DIF */ |
bd623e79 MP |
794 | host_dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type); |
795 | if (host_dif) | |
4e7392ec | 796 | protect = 1 << 5; |
af55ff67 | 797 | else |
4e7392ec MP |
798 | protect = 0; |
799 | ||
800 | if (host_dif == SD_DIF_TYPE2_PROTECTION) { | |
801 | SCpnt->cmnd = mempool_alloc(sd_cdb_pool, GFP_ATOMIC); | |
802 | ||
803 | if (unlikely(SCpnt->cmnd == NULL)) { | |
804 | ret = BLKPREP_DEFER; | |
805 | goto out; | |
806 | } | |
af55ff67 | 807 | |
4e7392ec MP |
808 | SCpnt->cmd_len = SD_EXT_CDB_SIZE; |
809 | memset(SCpnt->cmnd, 0, SCpnt->cmd_len); | |
810 | SCpnt->cmnd[0] = VARIABLE_LENGTH_CMD; | |
811 | SCpnt->cmnd[7] = 0x18; | |
812 | SCpnt->cmnd[9] = (rq_data_dir(rq) == READ) ? READ_32 : WRITE_32; | |
33659ebb | 813 | SCpnt->cmnd[10] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
4e7392ec MP |
814 | |
815 | /* LBA */ | |
816 | SCpnt->cmnd[12] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0; | |
817 | SCpnt->cmnd[13] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0; | |
818 | SCpnt->cmnd[14] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0; | |
819 | SCpnt->cmnd[15] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0; | |
820 | SCpnt->cmnd[16] = (unsigned char) (block >> 24) & 0xff; | |
821 | SCpnt->cmnd[17] = (unsigned char) (block >> 16) & 0xff; | |
822 | SCpnt->cmnd[18] = (unsigned char) (block >> 8) & 0xff; | |
823 | SCpnt->cmnd[19] = (unsigned char) block & 0xff; | |
824 | ||
825 | /* Expected Indirect LBA */ | |
826 | SCpnt->cmnd[20] = (unsigned char) (block >> 24) & 0xff; | |
827 | SCpnt->cmnd[21] = (unsigned char) (block >> 16) & 0xff; | |
828 | SCpnt->cmnd[22] = (unsigned char) (block >> 8) & 0xff; | |
829 | SCpnt->cmnd[23] = (unsigned char) block & 0xff; | |
830 | ||
831 | /* Transfer length */ | |
832 | SCpnt->cmnd[28] = (unsigned char) (this_count >> 24) & 0xff; | |
833 | SCpnt->cmnd[29] = (unsigned char) (this_count >> 16) & 0xff; | |
834 | SCpnt->cmnd[30] = (unsigned char) (this_count >> 8) & 0xff; | |
835 | SCpnt->cmnd[31] = (unsigned char) this_count & 0xff; | |
836 | } else if (block > 0xffffffff) { | |
1da177e4 | 837 | SCpnt->cmnd[0] += READ_16 - READ_6; |
33659ebb | 838 | SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
1da177e4 LT |
839 | SCpnt->cmnd[2] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0; |
840 | SCpnt->cmnd[3] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0; | |
841 | SCpnt->cmnd[4] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0; | |
842 | SCpnt->cmnd[5] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0; | |
843 | SCpnt->cmnd[6] = (unsigned char) (block >> 24) & 0xff; | |
844 | SCpnt->cmnd[7] = (unsigned char) (block >> 16) & 0xff; | |
845 | SCpnt->cmnd[8] = (unsigned char) (block >> 8) & 0xff; | |
846 | SCpnt->cmnd[9] = (unsigned char) block & 0xff; | |
847 | SCpnt->cmnd[10] = (unsigned char) (this_count >> 24) & 0xff; | |
848 | SCpnt->cmnd[11] = (unsigned char) (this_count >> 16) & 0xff; | |
849 | SCpnt->cmnd[12] = (unsigned char) (this_count >> 8) & 0xff; | |
850 | SCpnt->cmnd[13] = (unsigned char) this_count & 0xff; | |
851 | SCpnt->cmnd[14] = SCpnt->cmnd[15] = 0; | |
852 | } else if ((this_count > 0xff) || (block > 0x1fffff) || | |
af55ff67 | 853 | scsi_device_protection(SCpnt->device) || |
1da177e4 LT |
854 | SCpnt->device->use_10_for_rw) { |
855 | if (this_count > 0xffff) | |
856 | this_count = 0xffff; | |
857 | ||
858 | SCpnt->cmnd[0] += READ_10 - READ_6; | |
33659ebb | 859 | SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
1da177e4 LT |
860 | SCpnt->cmnd[2] = (unsigned char) (block >> 24) & 0xff; |
861 | SCpnt->cmnd[3] = (unsigned char) (block >> 16) & 0xff; | |
862 | SCpnt->cmnd[4] = (unsigned char) (block >> 8) & 0xff; | |
863 | SCpnt->cmnd[5] = (unsigned char) block & 0xff; | |
864 | SCpnt->cmnd[6] = SCpnt->cmnd[9] = 0; | |
865 | SCpnt->cmnd[7] = (unsigned char) (this_count >> 8) & 0xff; | |
866 | SCpnt->cmnd[8] = (unsigned char) this_count & 0xff; | |
867 | } else { | |
33659ebb | 868 | if (unlikely(rq->cmd_flags & REQ_FUA)) { |
007365ad TH |
869 | /* |
870 | * This happens only if this drive failed | |
871 | * 10byte rw command with ILLEGAL_REQUEST | |
872 | * during operation and thus turned off | |
873 | * use_10_for_rw. | |
874 | */ | |
e73aec82 MP |
875 | scmd_printk(KERN_ERR, SCpnt, |
876 | "FUA write on READ/WRITE(6) drive\n"); | |
7f9a6bc4 | 877 | goto out; |
007365ad TH |
878 | } |
879 | ||
1da177e4 LT |
880 | SCpnt->cmnd[1] |= (unsigned char) ((block >> 16) & 0x1f); |
881 | SCpnt->cmnd[2] = (unsigned char) ((block >> 8) & 0xff); | |
882 | SCpnt->cmnd[3] = (unsigned char) block & 0xff; | |
883 | SCpnt->cmnd[4] = (unsigned char) this_count; | |
884 | SCpnt->cmnd[5] = 0; | |
885 | } | |
30b0c37b | 886 | SCpnt->sdb.length = this_count * sdp->sector_size; |
1da177e4 | 887 | |
af55ff67 | 888 | /* If DIF or DIX is enabled, tell HBA how to handle request */ |
bd623e79 | 889 | if (host_dif || scsi_prot_sg_count(SCpnt)) |
35e1a5d9 | 890 | sd_prot_op(SCpnt, host_dif); |
af55ff67 | 891 | |
1da177e4 LT |
892 | /* |
893 | * We shouldn't disconnect in the middle of a sector, so with a dumb | |
894 | * host adapter, it's safe to assume that we can at least transfer | |
895 | * this many bytes between each connect / disconnect. | |
896 | */ | |
897 | SCpnt->transfersize = sdp->sector_size; | |
898 | SCpnt->underflow = this_count << 9; | |
899 | SCpnt->allowed = SD_MAX_RETRIES; | |
1da177e4 | 900 | |
1da177e4 LT |
901 | /* |
902 | * This indicates that the command is ready from our end to be | |
903 | * queued. | |
904 | */ | |
7f9a6bc4 JB |
905 | ret = BLKPREP_OK; |
906 | out: | |
907 | return scsi_prep_return(q, rq, ret); | |
1da177e4 LT |
908 | } |
909 | ||
910 | /** | |
911 | * sd_open - open a scsi disk device | |
912 | * @inode: only i_rdev member may be used | |
913 | * @filp: only f_mode and f_flags may be used | |
914 | * | |
915 | * Returns 0 if successful. Returns a negated errno value in case | |
916 | * of error. | |
917 | * | |
918 | * Note: This can be called from a user context (e.g. fsck(1) ) | |
919 | * or from within the kernel (e.g. as a result of a mount(1) ). | |
920 | * In the latter case @inode and @filp carry an abridged amount | |
921 | * of information as noted above. | |
409f3499 AB |
922 | * |
923 | * Locking: called with bdev->bd_mutex held. | |
1da177e4 | 924 | **/ |
0338e291 | 925 | static int sd_open(struct block_device *bdev, fmode_t mode) |
1da177e4 | 926 | { |
0338e291 | 927 | struct scsi_disk *sdkp = scsi_disk_get(bdev->bd_disk); |
1da177e4 LT |
928 | struct scsi_device *sdev; |
929 | int retval; | |
930 | ||
0338e291 | 931 | if (!sdkp) |
1da177e4 LT |
932 | return -ENXIO; |
933 | ||
fa0d34be | 934 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_open\n")); |
1da177e4 LT |
935 | |
936 | sdev = sdkp->device; | |
937 | ||
478a8a05 AS |
938 | retval = scsi_autopm_get_device(sdev); |
939 | if (retval) | |
940 | goto error_autopm; | |
941 | ||
1da177e4 LT |
942 | /* |
943 | * If the device is in error recovery, wait until it is done. | |
944 | * If the device is offline, then disallow any access to it. | |
945 | */ | |
946 | retval = -ENXIO; | |
947 | if (!scsi_block_when_processing_errors(sdev)) | |
948 | goto error_out; | |
949 | ||
950 | if (sdev->removable || sdkp->write_prot) | |
0338e291 | 951 | check_disk_change(bdev); |
1da177e4 LT |
952 | |
953 | /* | |
954 | * If the drive is empty, just let the open fail. | |
955 | */ | |
956 | retval = -ENOMEDIUM; | |
0338e291 | 957 | if (sdev->removable && !sdkp->media_present && !(mode & FMODE_NDELAY)) |
1da177e4 LT |
958 | goto error_out; |
959 | ||
960 | /* | |
961 | * If the device has the write protect tab set, have the open fail | |
962 | * if the user expects to be able to write to the thing. | |
963 | */ | |
964 | retval = -EROFS; | |
0338e291 | 965 | if (sdkp->write_prot && (mode & FMODE_WRITE)) |
1da177e4 LT |
966 | goto error_out; |
967 | ||
968 | /* | |
969 | * It is possible that the disk changing stuff resulted in | |
970 | * the device being taken offline. If this is the case, | |
971 | * report this to the user, and don't pretend that the | |
972 | * open actually succeeded. | |
973 | */ | |
974 | retval = -ENXIO; | |
975 | if (!scsi_device_online(sdev)) | |
976 | goto error_out; | |
977 | ||
409f3499 | 978 | if ((atomic_inc_return(&sdkp->openers) == 1) && sdev->removable) { |
1da177e4 LT |
979 | if (scsi_block_when_processing_errors(sdev)) |
980 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT); | |
981 | } | |
982 | ||
983 | return 0; | |
984 | ||
985 | error_out: | |
478a8a05 AS |
986 | scsi_autopm_put_device(sdev); |
987 | error_autopm: | |
1da177e4 LT |
988 | scsi_disk_put(sdkp); |
989 | return retval; | |
990 | } | |
991 | ||
992 | /** | |
993 | * sd_release - invoked when the (last) close(2) is called on this | |
994 | * scsi disk. | |
995 | * @inode: only i_rdev member may be used | |
996 | * @filp: only f_mode and f_flags may be used | |
997 | * | |
998 | * Returns 0. | |
999 | * | |
1000 | * Note: may block (uninterruptible) if error recovery is underway | |
1001 | * on this disk. | |
409f3499 AB |
1002 | * |
1003 | * Locking: called with bdev->bd_mutex held. | |
1da177e4 | 1004 | **/ |
0338e291 | 1005 | static int sd_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 1006 | { |
1da177e4 LT |
1007 | struct scsi_disk *sdkp = scsi_disk(disk); |
1008 | struct scsi_device *sdev = sdkp->device; | |
1009 | ||
56937f7b | 1010 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_release\n")); |
1da177e4 | 1011 | |
7e443312 | 1012 | if (atomic_dec_return(&sdkp->openers) == 0 && sdev->removable) { |
1da177e4 LT |
1013 | if (scsi_block_when_processing_errors(sdev)) |
1014 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW); | |
1015 | } | |
1016 | ||
1017 | /* | |
1018 | * XXX and what if there are packets in flight and this close() | |
1019 | * XXX is followed by a "rmmod sd_mod"? | |
1020 | */ | |
478a8a05 AS |
1021 | |
1022 | scsi_autopm_put_device(sdev); | |
1da177e4 LT |
1023 | scsi_disk_put(sdkp); |
1024 | return 0; | |
1025 | } | |
1026 | ||
a885c8c4 | 1027 | static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
1da177e4 LT |
1028 | { |
1029 | struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk); | |
1030 | struct scsi_device *sdp = sdkp->device; | |
1031 | struct Scsi_Host *host = sdp->host; | |
1032 | int diskinfo[4]; | |
1033 | ||
1034 | /* default to most commonly used values */ | |
1035 | diskinfo[0] = 0x40; /* 1 << 6 */ | |
1036 | diskinfo[1] = 0x20; /* 1 << 5 */ | |
1037 | diskinfo[2] = sdkp->capacity >> 11; | |
1038 | ||
1039 | /* override with calculated, extended default, or driver values */ | |
1040 | if (host->hostt->bios_param) | |
1041 | host->hostt->bios_param(sdp, bdev, sdkp->capacity, diskinfo); | |
1042 | else | |
1043 | scsicam_bios_param(bdev, sdkp->capacity, diskinfo); | |
1044 | ||
a885c8c4 CH |
1045 | geo->heads = diskinfo[0]; |
1046 | geo->sectors = diskinfo[1]; | |
1047 | geo->cylinders = diskinfo[2]; | |
1da177e4 LT |
1048 | return 0; |
1049 | } | |
1050 | ||
1051 | /** | |
1052 | * sd_ioctl - process an ioctl | |
1053 | * @inode: only i_rdev/i_bdev members may be used | |
1054 | * @filp: only f_mode and f_flags may be used | |
1055 | * @cmd: ioctl command number | |
1056 | * @arg: this is third argument given to ioctl(2) system call. | |
1057 | * Often contains a pointer. | |
1058 | * | |
25985edc | 1059 | * Returns 0 if successful (some ioctls return positive numbers on |
1da177e4 LT |
1060 | * success as well). Returns a negated errno value in case of error. |
1061 | * | |
1062 | * Note: most ioctls are forward onto the block subsystem or further | |
3a4fa0a2 | 1063 | * down in the scsi subsystem. |
1da177e4 | 1064 | **/ |
0338e291 | 1065 | static int sd_ioctl(struct block_device *bdev, fmode_t mode, |
1da177e4 LT |
1066 | unsigned int cmd, unsigned long arg) |
1067 | { | |
1da177e4 LT |
1068 | struct gendisk *disk = bdev->bd_disk; |
1069 | struct scsi_device *sdp = scsi_disk(disk)->device; | |
1070 | void __user *p = (void __user *)arg; | |
1071 | int error; | |
1072 | ||
1073 | SCSI_LOG_IOCTL(1, printk("sd_ioctl: disk=%s, cmd=0x%x\n", | |
1074 | disk->disk_name, cmd)); | |
1075 | ||
1076 | /* | |
1077 | * If we are in the middle of error recovery, don't let anyone | |
1078 | * else try and use this device. Also, if error recovery fails, it | |
1079 | * may try and take the device offline, in which case all further | |
1080 | * access to the device is prohibited. | |
1081 | */ | |
83ff6fe8 | 1082 | error = scsi_nonblockable_ioctl(sdp, cmd, p, |
fd4ce1ac | 1083 | (mode & FMODE_NDELAY) != 0); |
1da177e4 | 1084 | if (!scsi_block_when_processing_errors(sdp) || !error) |
8a6cfeb6 | 1085 | goto out; |
1da177e4 | 1086 | |
1da177e4 LT |
1087 | /* |
1088 | * Send SCSI addressing ioctls directly to mid level, send other | |
1089 | * ioctls to block level and then onto mid level if they can't be | |
1090 | * resolved. | |
1091 | */ | |
1092 | switch (cmd) { | |
1093 | case SCSI_IOCTL_GET_IDLUN: | |
1094 | case SCSI_IOCTL_GET_BUS_NUMBER: | |
8a6cfeb6 AB |
1095 | error = scsi_ioctl(sdp, cmd, p); |
1096 | break; | |
1da177e4 | 1097 | default: |
0338e291 | 1098 | error = scsi_cmd_ioctl(disk->queue, disk, mode, cmd, p); |
1da177e4 | 1099 | if (error != -ENOTTY) |
8a6cfeb6 AB |
1100 | break; |
1101 | error = scsi_ioctl(sdp, cmd, p); | |
1102 | break; | |
1da177e4 | 1103 | } |
8a6cfeb6 | 1104 | out: |
8a6cfeb6 | 1105 | return error; |
1da177e4 LT |
1106 | } |
1107 | ||
1108 | static void set_media_not_present(struct scsi_disk *sdkp) | |
1109 | { | |
2bae0093 TH |
1110 | if (sdkp->media_present) |
1111 | sdkp->device->changed = 1; | |
1112 | ||
1113 | if (sdkp->device->removable) { | |
1114 | sdkp->media_present = 0; | |
1115 | sdkp->capacity = 0; | |
1116 | } | |
1117 | } | |
1118 | ||
1119 | static int media_not_present(struct scsi_disk *sdkp, | |
1120 | struct scsi_sense_hdr *sshdr) | |
1121 | { | |
1122 | if (!scsi_sense_valid(sshdr)) | |
1123 | return 0; | |
1124 | ||
1125 | /* not invoked for commands that could return deferred errors */ | |
1126 | switch (sshdr->sense_key) { | |
1127 | case UNIT_ATTENTION: | |
1128 | case NOT_READY: | |
1129 | /* medium not present */ | |
1130 | if (sshdr->asc == 0x3A) { | |
1131 | set_media_not_present(sdkp); | |
1132 | return 1; | |
1133 | } | |
1134 | } | |
1135 | return 0; | |
1da177e4 LT |
1136 | } |
1137 | ||
1138 | /** | |
2bae0093 TH |
1139 | * sd_check_events - check media events |
1140 | * @disk: kernel device descriptor | |
1141 | * @clearing: disk events currently being cleared | |
1da177e4 | 1142 | * |
2bae0093 | 1143 | * Returns mask of DISK_EVENT_*. |
1da177e4 LT |
1144 | * |
1145 | * Note: this function is invoked from the block subsystem. | |
1146 | **/ | |
2bae0093 | 1147 | static unsigned int sd_check_events(struct gendisk *disk, unsigned int clearing) |
1da177e4 LT |
1148 | { |
1149 | struct scsi_disk *sdkp = scsi_disk(disk); | |
1150 | struct scsi_device *sdp = sdkp->device; | |
001aac25 | 1151 | struct scsi_sense_hdr *sshdr = NULL; |
1da177e4 LT |
1152 | int retval; |
1153 | ||
2bae0093 | 1154 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_check_events\n")); |
1da177e4 LT |
1155 | |
1156 | /* | |
1157 | * If the device is offline, don't send any commands - just pretend as | |
1158 | * if the command failed. If the device ever comes back online, we | |
1159 | * can deal with it then. It is only because of unrecoverable errors | |
1160 | * that we would ever take a device offline in the first place. | |
1161 | */ | |
285e9670 KS |
1162 | if (!scsi_device_online(sdp)) { |
1163 | set_media_not_present(sdkp); | |
285e9670 KS |
1164 | goto out; |
1165 | } | |
1da177e4 LT |
1166 | |
1167 | /* | |
1168 | * Using TEST_UNIT_READY enables differentiation between drive with | |
1169 | * no cartridge loaded - NOT READY, drive with changed cartridge - | |
1170 | * UNIT ATTENTION, or with same cartridge - GOOD STATUS. | |
1171 | * | |
1172 | * Drives that auto spin down. eg iomega jaz 1G, will be started | |
1173 | * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever | |
1174 | * sd_revalidate() is called. | |
1175 | */ | |
1176 | retval = -ENODEV; | |
285e9670 | 1177 | |
001aac25 JB |
1178 | if (scsi_block_when_processing_errors(sdp)) { |
1179 | sshdr = kzalloc(sizeof(*sshdr), GFP_KERNEL); | |
1180 | retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, SD_MAX_RETRIES, | |
1181 | sshdr); | |
1182 | } | |
1da177e4 | 1183 | |
2bae0093 TH |
1184 | /* failed to execute TUR, assume media not present */ |
1185 | if (host_byte(retval)) { | |
285e9670 | 1186 | set_media_not_present(sdkp); |
285e9670 KS |
1187 | goto out; |
1188 | } | |
1da177e4 | 1189 | |
2bae0093 TH |
1190 | if (media_not_present(sdkp, sshdr)) |
1191 | goto out; | |
1192 | ||
1da177e4 LT |
1193 | /* |
1194 | * For removable scsi disk we have to recognise the presence | |
2bae0093 | 1195 | * of a disk in the drive. |
1da177e4 | 1196 | */ |
2bae0093 TH |
1197 | if (!sdkp->media_present) |
1198 | sdp->changed = 1; | |
1da177e4 | 1199 | sdkp->media_present = 1; |
285e9670 | 1200 | out: |
3ff5588d | 1201 | /* |
2bae0093 | 1202 | * sdp->changed is set under the following conditions: |
3ff5588d | 1203 | * |
2bae0093 TH |
1204 | * Medium present state has changed in either direction. |
1205 | * Device has indicated UNIT_ATTENTION. | |
3ff5588d | 1206 | */ |
001aac25 | 1207 | kfree(sshdr); |
2bae0093 TH |
1208 | retval = sdp->changed ? DISK_EVENT_MEDIA_CHANGE : 0; |
1209 | sdp->changed = 0; | |
1da177e4 | 1210 | return retval; |
1da177e4 LT |
1211 | } |
1212 | ||
e73aec82 | 1213 | static int sd_sync_cache(struct scsi_disk *sdkp) |
1da177e4 | 1214 | { |
1da177e4 | 1215 | int retries, res; |
e73aec82 | 1216 | struct scsi_device *sdp = sdkp->device; |
ea73a9f2 | 1217 | struct scsi_sense_hdr sshdr; |
1da177e4 LT |
1218 | |
1219 | if (!scsi_device_online(sdp)) | |
1220 | return -ENODEV; | |
1221 | ||
1da177e4 | 1222 | |
1da177e4 LT |
1223 | for (retries = 3; retries > 0; --retries) { |
1224 | unsigned char cmd[10] = { 0 }; | |
1225 | ||
1226 | cmd[0] = SYNCHRONIZE_CACHE; | |
1227 | /* | |
1228 | * Leave the rest of the command zero to indicate | |
1229 | * flush everything. | |
1230 | */ | |
ea73a9f2 | 1231 | res = scsi_execute_req(sdp, cmd, DMA_NONE, NULL, 0, &sshdr, |
e3b3e624 | 1232 | SD_FLUSH_TIMEOUT, SD_MAX_RETRIES, NULL); |
ea73a9f2 | 1233 | if (res == 0) |
1da177e4 LT |
1234 | break; |
1235 | } | |
1236 | ||
e73aec82 MP |
1237 | if (res) { |
1238 | sd_print_result(sdkp, res); | |
1239 | if (driver_byte(res) & DRIVER_SENSE) | |
1240 | sd_print_sense_hdr(sdkp, &sshdr); | |
1da177e4 LT |
1241 | } |
1242 | ||
3721050a TH |
1243 | if (res) |
1244 | return -EIO; | |
1245 | return 0; | |
1da177e4 LT |
1246 | } |
1247 | ||
1da177e4 LT |
1248 | static void sd_rescan(struct device *dev) |
1249 | { | |
39b7f1e2 AS |
1250 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
1251 | ||
1252 | if (sdkp) { | |
f98a8cae | 1253 | revalidate_disk(sdkp->disk); |
39b7f1e2 AS |
1254 | scsi_disk_put(sdkp); |
1255 | } | |
1da177e4 LT |
1256 | } |
1257 | ||
1258 | ||
1259 | #ifdef CONFIG_COMPAT | |
1260 | /* | |
1261 | * This gets directly called from VFS. When the ioctl | |
1262 | * is not recognized we go back to the other translation paths. | |
1263 | */ | |
0338e291 AV |
1264 | static int sd_compat_ioctl(struct block_device *bdev, fmode_t mode, |
1265 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1266 | { |
0338e291 | 1267 | struct scsi_device *sdev = scsi_disk(bdev->bd_disk)->device; |
1da177e4 LT |
1268 | |
1269 | /* | |
1270 | * If we are in the middle of error recovery, don't let anyone | |
1271 | * else try and use this device. Also, if error recovery fails, it | |
1272 | * may try and take the device offline, in which case all further | |
1273 | * access to the device is prohibited. | |
1274 | */ | |
1275 | if (!scsi_block_when_processing_errors(sdev)) | |
1276 | return -ENODEV; | |
1277 | ||
1278 | if (sdev->host->hostt->compat_ioctl) { | |
1279 | int ret; | |
1280 | ||
1281 | ret = sdev->host->hostt->compat_ioctl(sdev, cmd, (void __user *)arg); | |
1282 | ||
1283 | return ret; | |
1284 | } | |
1285 | ||
1286 | /* | |
1287 | * Let the static ioctl translation table take care of it. | |
1288 | */ | |
1289 | return -ENOIOCTLCMD; | |
1290 | } | |
1291 | #endif | |
1292 | ||
83d5cde4 | 1293 | static const struct block_device_operations sd_fops = { |
1da177e4 | 1294 | .owner = THIS_MODULE, |
0338e291 AV |
1295 | .open = sd_open, |
1296 | .release = sd_release, | |
8a6cfeb6 | 1297 | .ioctl = sd_ioctl, |
a885c8c4 | 1298 | .getgeo = sd_getgeo, |
1da177e4 | 1299 | #ifdef CONFIG_COMPAT |
0338e291 | 1300 | .compat_ioctl = sd_compat_ioctl, |
1da177e4 | 1301 | #endif |
2bae0093 | 1302 | .check_events = sd_check_events, |
1da177e4 | 1303 | .revalidate_disk = sd_revalidate_disk, |
72ec24bd | 1304 | .unlock_native_capacity = sd_unlock_native_capacity, |
1da177e4 LT |
1305 | }; |
1306 | ||
af55ff67 MP |
1307 | static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd) |
1308 | { | |
83096ebf TH |
1309 | u64 start_lba = blk_rq_pos(scmd->request); |
1310 | u64 end_lba = blk_rq_pos(scmd->request) + (scsi_bufflen(scmd) / 512); | |
af55ff67 MP |
1311 | u64 bad_lba; |
1312 | int info_valid; | |
a8733c7b JB |
1313 | /* |
1314 | * resid is optional but mostly filled in. When it's unused, | |
1315 | * its value is zero, so we assume the whole buffer transferred | |
1316 | */ | |
1317 | unsigned int transferred = scsi_bufflen(scmd) - scsi_get_resid(scmd); | |
1318 | unsigned int good_bytes; | |
af55ff67 | 1319 | |
33659ebb | 1320 | if (scmd->request->cmd_type != REQ_TYPE_FS) |
af55ff67 MP |
1321 | return 0; |
1322 | ||
1323 | info_valid = scsi_get_sense_info_fld(scmd->sense_buffer, | |
1324 | SCSI_SENSE_BUFFERSIZE, | |
1325 | &bad_lba); | |
1326 | if (!info_valid) | |
1327 | return 0; | |
1328 | ||
1329 | if (scsi_bufflen(scmd) <= scmd->device->sector_size) | |
1330 | return 0; | |
1331 | ||
1332 | if (scmd->device->sector_size < 512) { | |
1333 | /* only legitimate sector_size here is 256 */ | |
1334 | start_lba <<= 1; | |
1335 | end_lba <<= 1; | |
1336 | } else { | |
1337 | /* be careful ... don't want any overflows */ | |
1338 | u64 factor = scmd->device->sector_size / 512; | |
1339 | do_div(start_lba, factor); | |
1340 | do_div(end_lba, factor); | |
1341 | } | |
1342 | ||
1343 | /* The bad lba was reported incorrectly, we have no idea where | |
1344 | * the error is. | |
1345 | */ | |
1346 | if (bad_lba < start_lba || bad_lba >= end_lba) | |
1347 | return 0; | |
1348 | ||
1349 | /* This computation should always be done in terms of | |
1350 | * the resolution of the device's medium. | |
1351 | */ | |
a8733c7b JB |
1352 | good_bytes = (bad_lba - start_lba) * scmd->device->sector_size; |
1353 | return min(good_bytes, transferred); | |
af55ff67 MP |
1354 | } |
1355 | ||
1da177e4 | 1356 | /** |
7b3d9545 | 1357 | * sd_done - bottom half handler: called when the lower level |
1da177e4 LT |
1358 | * driver has completed (successfully or otherwise) a scsi command. |
1359 | * @SCpnt: mid-level's per command structure. | |
1360 | * | |
1361 | * Note: potentially run from within an ISR. Must not block. | |
1362 | **/ | |
7b3d9545 | 1363 | static int sd_done(struct scsi_cmnd *SCpnt) |
1da177e4 LT |
1364 | { |
1365 | int result = SCpnt->result; | |
af55ff67 | 1366 | unsigned int good_bytes = result ? 0 : scsi_bufflen(SCpnt); |
1da177e4 | 1367 | struct scsi_sense_hdr sshdr; |
4e7392ec | 1368 | struct scsi_disk *sdkp = scsi_disk(SCpnt->request->rq_disk); |
1da177e4 LT |
1369 | int sense_valid = 0; |
1370 | int sense_deferred = 0; | |
c98a0eb0 | 1371 | unsigned char op = SCpnt->cmnd[0]; |
1da177e4 | 1372 | |
c98a0eb0 MP |
1373 | if ((SCpnt->request->cmd_flags & REQ_DISCARD) && !result) |
1374 | scsi_set_resid(SCpnt, 0); | |
6a32a8ae | 1375 | |
1da177e4 LT |
1376 | if (result) { |
1377 | sense_valid = scsi_command_normalize_sense(SCpnt, &sshdr); | |
1378 | if (sense_valid) | |
1379 | sense_deferred = scsi_sense_is_deferred(&sshdr); | |
1380 | } | |
1da177e4 | 1381 | #ifdef CONFIG_SCSI_LOGGING |
fa0d34be | 1382 | SCSI_LOG_HLCOMPLETE(1, scsi_print_result(SCpnt)); |
1da177e4 | 1383 | if (sense_valid) { |
fa0d34be | 1384 | SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO, SCpnt, |
7b3d9545 | 1385 | "sd_done: sb[respc,sk,asc," |
fa0d34be MP |
1386 | "ascq]=%x,%x,%x,%x\n", |
1387 | sshdr.response_code, | |
1388 | sshdr.sense_key, sshdr.asc, | |
1389 | sshdr.ascq)); | |
1da177e4 LT |
1390 | } |
1391 | #endif | |
03aba2f7 LT |
1392 | if (driver_byte(result) != DRIVER_SENSE && |
1393 | (!sense_valid || sense_deferred)) | |
1394 | goto out; | |
1395 | ||
1396 | switch (sshdr.sense_key) { | |
1397 | case HARDWARE_ERROR: | |
1398 | case MEDIUM_ERROR: | |
af55ff67 | 1399 | good_bytes = sd_completed_bytes(SCpnt); |
03aba2f7 LT |
1400 | break; |
1401 | case RECOVERED_ERROR: | |
af55ff67 MP |
1402 | good_bytes = scsi_bufflen(SCpnt); |
1403 | break; | |
10dab226 JW |
1404 | case NO_SENSE: |
1405 | /* This indicates a false check condition, so ignore it. An | |
1406 | * unknown amount of data was transferred so treat it as an | |
1407 | * error. | |
1408 | */ | |
1409 | scsi_print_sense("sd", SCpnt); | |
1410 | SCpnt->result = 0; | |
1411 | memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); | |
1412 | break; | |
c98a0eb0 MP |
1413 | case ABORTED_COMMAND: |
1414 | if (sshdr.asc == 0x10) /* DIF: Target detected corruption */ | |
1415 | good_bytes = sd_completed_bytes(SCpnt); | |
1416 | break; | |
1417 | case ILLEGAL_REQUEST: | |
1418 | if (sshdr.asc == 0x10) /* DIX: Host detected corruption */ | |
af55ff67 | 1419 | good_bytes = sd_completed_bytes(SCpnt); |
c98a0eb0 MP |
1420 | /* INVALID COMMAND OPCODE or INVALID FIELD IN CDB */ |
1421 | if ((sshdr.asc == 0x20 || sshdr.asc == 0x24) && | |
1422 | (op == UNMAP || op == WRITE_SAME_16 || op == WRITE_SAME)) | |
1423 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
03aba2f7 LT |
1424 | break; |
1425 | default: | |
1426 | break; | |
1da177e4 | 1427 | } |
03aba2f7 | 1428 | out: |
af55ff67 MP |
1429 | if (rq_data_dir(SCpnt->request) == READ && scsi_prot_sg_count(SCpnt)) |
1430 | sd_dif_complete(SCpnt, good_bytes); | |
1431 | ||
4e7392ec | 1432 | if (scsi_host_dif_capable(sdkp->device->host, sdkp->protection_type) |
77c9cfc5 MP |
1433 | == SD_DIF_TYPE2_PROTECTION && SCpnt->cmnd != SCpnt->request->cmd) { |
1434 | ||
1435 | /* We have to print a failed command here as the | |
1436 | * extended CDB gets freed before scsi_io_completion() | |
1437 | * is called. | |
1438 | */ | |
1439 | if (result) | |
1440 | scsi_print_command(SCpnt); | |
1441 | ||
4e7392ec | 1442 | mempool_free(SCpnt->cmnd, sd_cdb_pool); |
77c9cfc5 MP |
1443 | SCpnt->cmnd = NULL; |
1444 | SCpnt->cmd_len = 0; | |
1445 | } | |
4e7392ec | 1446 | |
7b3d9545 | 1447 | return good_bytes; |
1da177e4 LT |
1448 | } |
1449 | ||
1da177e4 LT |
1450 | /* |
1451 | * spinup disk - called only in sd_revalidate_disk() | |
1452 | */ | |
1453 | static void | |
e73aec82 | 1454 | sd_spinup_disk(struct scsi_disk *sdkp) |
ea73a9f2 | 1455 | { |
1da177e4 | 1456 | unsigned char cmd[10]; |
4451e472 | 1457 | unsigned long spintime_expire = 0; |
1da177e4 LT |
1458 | int retries, spintime; |
1459 | unsigned int the_result; | |
1460 | struct scsi_sense_hdr sshdr; | |
1461 | int sense_valid = 0; | |
1462 | ||
1463 | spintime = 0; | |
1464 | ||
1465 | /* Spin up drives, as required. Only do this at boot time */ | |
1466 | /* Spinup needs to be done for module loads too. */ | |
1467 | do { | |
1468 | retries = 0; | |
1469 | ||
1470 | do { | |
1471 | cmd[0] = TEST_UNIT_READY; | |
1472 | memset((void *) &cmd[1], 0, 9); | |
1473 | ||
ea73a9f2 JB |
1474 | the_result = scsi_execute_req(sdkp->device, cmd, |
1475 | DMA_NONE, NULL, 0, | |
1476 | &sshdr, SD_TIMEOUT, | |
f4f4e47e | 1477 | SD_MAX_RETRIES, NULL); |
1da177e4 | 1478 | |
b4d38e38 AS |
1479 | /* |
1480 | * If the drive has indicated to us that it | |
1481 | * doesn't have any media in it, don't bother | |
1482 | * with any more polling. | |
1483 | */ | |
1484 | if (media_not_present(sdkp, &sshdr)) | |
1485 | return; | |
1486 | ||
1da177e4 | 1487 | if (the_result) |
ea73a9f2 | 1488 | sense_valid = scsi_sense_valid(&sshdr); |
1da177e4 LT |
1489 | retries++; |
1490 | } while (retries < 3 && | |
1491 | (!scsi_status_is_good(the_result) || | |
1492 | ((driver_byte(the_result) & DRIVER_SENSE) && | |
1493 | sense_valid && sshdr.sense_key == UNIT_ATTENTION))); | |
1494 | ||
1da177e4 LT |
1495 | if ((driver_byte(the_result) & DRIVER_SENSE) == 0) { |
1496 | /* no sense, TUR either succeeded or failed | |
1497 | * with a status error */ | |
e73aec82 MP |
1498 | if(!spintime && !scsi_status_is_good(the_result)) { |
1499 | sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n"); | |
1500 | sd_print_result(sdkp, the_result); | |
1501 | } | |
1da177e4 LT |
1502 | break; |
1503 | } | |
1504 | ||
1505 | /* | |
1506 | * The device does not want the automatic start to be issued. | |
1507 | */ | |
33dd6f92 | 1508 | if (sdkp->device->no_start_on_add) |
1da177e4 | 1509 | break; |
1da177e4 | 1510 | |
33dd6f92 MW |
1511 | if (sense_valid && sshdr.sense_key == NOT_READY) { |
1512 | if (sshdr.asc == 4 && sshdr.ascq == 3) | |
1513 | break; /* manual intervention required */ | |
1514 | if (sshdr.asc == 4 && sshdr.ascq == 0xb) | |
1515 | break; /* standby */ | |
1516 | if (sshdr.asc == 4 && sshdr.ascq == 0xc) | |
1517 | break; /* unavailable */ | |
1518 | /* | |
1519 | * Issue command to spin up drive when not ready | |
1520 | */ | |
1da177e4 | 1521 | if (!spintime) { |
e73aec82 | 1522 | sd_printk(KERN_NOTICE, sdkp, "Spinning up disk..."); |
1da177e4 LT |
1523 | cmd[0] = START_STOP; |
1524 | cmd[1] = 1; /* Return immediately */ | |
1525 | memset((void *) &cmd[2], 0, 8); | |
1526 | cmd[4] = 1; /* Start spin cycle */ | |
d2886ea3 SR |
1527 | if (sdkp->device->start_stop_pwr_cond) |
1528 | cmd[4] |= 1 << 4; | |
ea73a9f2 JB |
1529 | scsi_execute_req(sdkp->device, cmd, DMA_NONE, |
1530 | NULL, 0, &sshdr, | |
f4f4e47e FT |
1531 | SD_TIMEOUT, SD_MAX_RETRIES, |
1532 | NULL); | |
4451e472 AS |
1533 | spintime_expire = jiffies + 100 * HZ; |
1534 | spintime = 1; | |
1da177e4 | 1535 | } |
1da177e4 LT |
1536 | /* Wait 1 second for next try */ |
1537 | msleep(1000); | |
1538 | printk("."); | |
4451e472 AS |
1539 | |
1540 | /* | |
1541 | * Wait for USB flash devices with slow firmware. | |
1542 | * Yes, this sense key/ASC combination shouldn't | |
1543 | * occur here. It's characteristic of these devices. | |
1544 | */ | |
1545 | } else if (sense_valid && | |
1546 | sshdr.sense_key == UNIT_ATTENTION && | |
1547 | sshdr.asc == 0x28) { | |
1548 | if (!spintime) { | |
1549 | spintime_expire = jiffies + 5 * HZ; | |
1550 | spintime = 1; | |
1551 | } | |
1552 | /* Wait 1 second for next try */ | |
1553 | msleep(1000); | |
1da177e4 LT |
1554 | } else { |
1555 | /* we don't understand the sense code, so it's | |
1556 | * probably pointless to loop */ | |
1557 | if(!spintime) { | |
e73aec82 MP |
1558 | sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n"); |
1559 | sd_print_sense_hdr(sdkp, &sshdr); | |
1da177e4 LT |
1560 | } |
1561 | break; | |
1562 | } | |
1563 | ||
4451e472 | 1564 | } while (spintime && time_before_eq(jiffies, spintime_expire)); |
1da177e4 LT |
1565 | |
1566 | if (spintime) { | |
1567 | if (scsi_status_is_good(the_result)) | |
1568 | printk("ready\n"); | |
1569 | else | |
1570 | printk("not responding...\n"); | |
1571 | } | |
1572 | } | |
1573 | ||
e0597d70 MP |
1574 | |
1575 | /* | |
1576 | * Determine whether disk supports Data Integrity Field. | |
1577 | */ | |
439d77f7 | 1578 | static void sd_read_protection_type(struct scsi_disk *sdkp, unsigned char *buffer) |
e0597d70 MP |
1579 | { |
1580 | struct scsi_device *sdp = sdkp->device; | |
1581 | u8 type; | |
1582 | ||
1583 | if (scsi_device_protection(sdp) == 0 || (buffer[12] & 1) == 0) | |
35e1a5d9 MP |
1584 | return; |
1585 | ||
1586 | type = ((buffer[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */ | |
1587 | ||
1588 | if (type == sdkp->protection_type || !sdkp->first_scan) | |
1589 | return; | |
e0597d70 | 1590 | |
be922f47 MP |
1591 | sdkp->protection_type = type; |
1592 | ||
4e7392ec | 1593 | if (type > SD_DIF_TYPE3_PROTECTION) { |
35e1a5d9 MP |
1594 | sd_printk(KERN_ERR, sdkp, "formatted with unsupported " \ |
1595 | "protection type %u. Disabling disk!\n", type); | |
1596 | sdkp->capacity = 0; | |
1597 | return; | |
e0597d70 MP |
1598 | } |
1599 | ||
35e1a5d9 MP |
1600 | if (scsi_host_dif_capable(sdp->host, type)) |
1601 | sd_printk(KERN_NOTICE, sdkp, | |
1602 | "Enabling DIF Type %u protection\n", type); | |
1603 | else | |
1604 | sd_printk(KERN_NOTICE, sdkp, | |
1605 | "Disabling DIF Type %u protection\n", type); | |
e0597d70 MP |
1606 | } |
1607 | ||
0da205e0 MW |
1608 | static void read_capacity_error(struct scsi_disk *sdkp, struct scsi_device *sdp, |
1609 | struct scsi_sense_hdr *sshdr, int sense_valid, | |
1610 | int the_result) | |
1611 | { | |
1612 | sd_print_result(sdkp, the_result); | |
1613 | if (driver_byte(the_result) & DRIVER_SENSE) | |
1614 | sd_print_sense_hdr(sdkp, sshdr); | |
1615 | else | |
1616 | sd_printk(KERN_NOTICE, sdkp, "Sense not available.\n"); | |
1617 | ||
1618 | /* | |
1619 | * Set dirty bit for removable devices if not ready - | |
1620 | * sometimes drives will not report this properly. | |
1621 | */ | |
1622 | if (sdp->removable && | |
1623 | sense_valid && sshdr->sense_key == NOT_READY) | |
2bae0093 | 1624 | set_media_not_present(sdkp); |
0da205e0 MW |
1625 | |
1626 | /* | |
1627 | * We used to set media_present to 0 here to indicate no media | |
1628 | * in the drive, but some drives fail read capacity even with | |
1629 | * media present, so we can't do that. | |
1630 | */ | |
1631 | sdkp->capacity = 0; /* unknown mapped to zero - as usual */ | |
1632 | } | |
1633 | ||
1634 | #define RC16_LEN 32 | |
1635 | #if RC16_LEN > SD_BUF_SIZE | |
1636 | #error RC16_LEN must not be more than SD_BUF_SIZE | |
1637 | #endif | |
1638 | ||
3233ac19 JB |
1639 | #define READ_CAPACITY_RETRIES_ON_RESET 10 |
1640 | ||
0da205e0 MW |
1641 | static int read_capacity_16(struct scsi_disk *sdkp, struct scsi_device *sdp, |
1642 | unsigned char *buffer) | |
ea73a9f2 | 1643 | { |
1da177e4 | 1644 | unsigned char cmd[16]; |
1da177e4 LT |
1645 | struct scsi_sense_hdr sshdr; |
1646 | int sense_valid = 0; | |
0da205e0 | 1647 | int the_result; |
3233ac19 | 1648 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
ea09bcc9 | 1649 | unsigned int alignment; |
0da205e0 MW |
1650 | unsigned long long lba; |
1651 | unsigned sector_size; | |
1da177e4 | 1652 | |
5ce524bd HG |
1653 | if (sdp->no_read_capacity_16) |
1654 | return -EINVAL; | |
1655 | ||
1da177e4 | 1656 | do { |
0da205e0 MW |
1657 | memset(cmd, 0, 16); |
1658 | cmd[0] = SERVICE_ACTION_IN; | |
1659 | cmd[1] = SAI_READ_CAPACITY_16; | |
1660 | cmd[13] = RC16_LEN; | |
1661 | memset(buffer, 0, RC16_LEN); | |
1662 | ||
ea73a9f2 | 1663 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, |
0da205e0 MW |
1664 | buffer, RC16_LEN, &sshdr, |
1665 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
1da177e4 | 1666 | |
ea73a9f2 | 1667 | if (media_not_present(sdkp, &sshdr)) |
0da205e0 | 1668 | return -ENODEV; |
1da177e4 | 1669 | |
2b301307 | 1670 | if (the_result) { |
ea73a9f2 | 1671 | sense_valid = scsi_sense_valid(&sshdr); |
2b301307 MW |
1672 | if (sense_valid && |
1673 | sshdr.sense_key == ILLEGAL_REQUEST && | |
1674 | (sshdr.asc == 0x20 || sshdr.asc == 0x24) && | |
1675 | sshdr.ascq == 0x00) | |
1676 | /* Invalid Command Operation Code or | |
1677 | * Invalid Field in CDB, just retry | |
1678 | * silently with RC10 */ | |
1679 | return -EINVAL; | |
3233ac19 JB |
1680 | if (sense_valid && |
1681 | sshdr.sense_key == UNIT_ATTENTION && | |
1682 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) | |
1683 | /* Device reset might occur several times, | |
1684 | * give it one more chance */ | |
1685 | if (--reset_retries > 0) | |
1686 | continue; | |
2b301307 | 1687 | } |
1da177e4 LT |
1688 | retries--; |
1689 | ||
1690 | } while (the_result && retries); | |
1691 | ||
0da205e0 | 1692 | if (the_result) { |
e73aec82 | 1693 | sd_printk(KERN_NOTICE, sdkp, "READ CAPACITY(16) failed\n"); |
0da205e0 MW |
1694 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); |
1695 | return -EINVAL; | |
1696 | } | |
e73aec82 | 1697 | |
8f76d151 DH |
1698 | sector_size = get_unaligned_be32(&buffer[8]); |
1699 | lba = get_unaligned_be64(&buffer[0]); | |
0da205e0 MW |
1700 | |
1701 | sd_read_protection_type(sdkp, buffer); | |
1702 | ||
1703 | if ((sizeof(sdkp->capacity) == 4) && (lba >= 0xffffffffULL)) { | |
1704 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a " | |
1705 | "kernel compiled with support for large block " | |
1706 | "devices.\n"); | |
1707 | sdkp->capacity = 0; | |
1708 | return -EOVERFLOW; | |
1709 | } | |
1710 | ||
ea09bcc9 | 1711 | /* Logical blocks per physical block exponent */ |
526f7c79 | 1712 | sdkp->physical_block_size = (1 << (buffer[13] & 0xf)) * sector_size; |
ea09bcc9 MP |
1713 | |
1714 | /* Lowest aligned logical block */ | |
1715 | alignment = ((buffer[14] & 0x3f) << 8 | buffer[15]) * sector_size; | |
1716 | blk_queue_alignment_offset(sdp->request_queue, alignment); | |
1717 | if (alignment && sdkp->first_scan) | |
1718 | sd_printk(KERN_NOTICE, sdkp, | |
1719 | "physical block alignment offset: %u\n", alignment); | |
1720 | ||
c98a0eb0 MP |
1721 | if (buffer[14] & 0x80) { /* LBPME */ |
1722 | sdkp->lbpme = 1; | |
e339c1a7 | 1723 | |
c98a0eb0 MP |
1724 | if (buffer[14] & 0x40) /* LBPRZ */ |
1725 | sdkp->lbprz = 1; | |
e339c1a7 | 1726 | |
c98a0eb0 | 1727 | sd_config_discard(sdkp, SD_LBP_WS16); |
e339c1a7 MP |
1728 | } |
1729 | ||
0da205e0 MW |
1730 | sdkp->capacity = lba + 1; |
1731 | return sector_size; | |
1732 | } | |
1733 | ||
1734 | static int read_capacity_10(struct scsi_disk *sdkp, struct scsi_device *sdp, | |
1735 | unsigned char *buffer) | |
1736 | { | |
1737 | unsigned char cmd[16]; | |
1738 | struct scsi_sense_hdr sshdr; | |
1739 | int sense_valid = 0; | |
1740 | int the_result; | |
3233ac19 | 1741 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
0da205e0 MW |
1742 | sector_t lba; |
1743 | unsigned sector_size; | |
1744 | ||
1745 | do { | |
1746 | cmd[0] = READ_CAPACITY; | |
1747 | memset(&cmd[1], 0, 9); | |
1748 | memset(buffer, 0, 8); | |
1749 | ||
1750 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, | |
1751 | buffer, 8, &sshdr, | |
1752 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
1753 | ||
1754 | if (media_not_present(sdkp, &sshdr)) | |
1755 | return -ENODEV; | |
1756 | ||
3233ac19 | 1757 | if (the_result) { |
0da205e0 | 1758 | sense_valid = scsi_sense_valid(&sshdr); |
3233ac19 JB |
1759 | if (sense_valid && |
1760 | sshdr.sense_key == UNIT_ATTENTION && | |
1761 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) | |
1762 | /* Device reset might occur several times, | |
1763 | * give it one more chance */ | |
1764 | if (--reset_retries > 0) | |
1765 | continue; | |
1766 | } | |
0da205e0 MW |
1767 | retries--; |
1768 | ||
1769 | } while (the_result && retries); | |
1770 | ||
1771 | if (the_result) { | |
1772 | sd_printk(KERN_NOTICE, sdkp, "READ CAPACITY failed\n"); | |
1773 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); | |
1774 | return -EINVAL; | |
1775 | } | |
1776 | ||
8f76d151 DH |
1777 | sector_size = get_unaligned_be32(&buffer[4]); |
1778 | lba = get_unaligned_be32(&buffer[0]); | |
0da205e0 | 1779 | |
5ce524bd HG |
1780 | if (sdp->no_read_capacity_16 && (lba == 0xffffffff)) { |
1781 | /* Some buggy (usb cardreader) devices return an lba of | |
1782 | 0xffffffff when the want to report a size of 0 (with | |
1783 | which they really mean no media is present) */ | |
1784 | sdkp->capacity = 0; | |
5cc10350 | 1785 | sdkp->physical_block_size = sector_size; |
5ce524bd HG |
1786 | return sector_size; |
1787 | } | |
1788 | ||
0da205e0 MW |
1789 | if ((sizeof(sdkp->capacity) == 4) && (lba == 0xffffffff)) { |
1790 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a " | |
1791 | "kernel compiled with support for large block " | |
1792 | "devices.\n"); | |
1793 | sdkp->capacity = 0; | |
1794 | return -EOVERFLOW; | |
1795 | } | |
1796 | ||
1797 | sdkp->capacity = lba + 1; | |
526f7c79 | 1798 | sdkp->physical_block_size = sector_size; |
0da205e0 MW |
1799 | return sector_size; |
1800 | } | |
1801 | ||
2b301307 MW |
1802 | static int sd_try_rc16_first(struct scsi_device *sdp) |
1803 | { | |
f87146bb HR |
1804 | if (sdp->host->max_cmd_len < 16) |
1805 | return 0; | |
2b301307 MW |
1806 | if (sdp->scsi_level > SCSI_SPC_2) |
1807 | return 1; | |
1808 | if (scsi_device_protection(sdp)) | |
1809 | return 1; | |
1810 | return 0; | |
1811 | } | |
1812 | ||
0da205e0 MW |
1813 | /* |
1814 | * read disk capacity | |
1815 | */ | |
1816 | static void | |
1817 | sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer) | |
1818 | { | |
1819 | int sector_size; | |
1820 | struct scsi_device *sdp = sdkp->device; | |
70a9b873 | 1821 | sector_t old_capacity = sdkp->capacity; |
0da205e0 | 1822 | |
2b301307 | 1823 | if (sd_try_rc16_first(sdp)) { |
0da205e0 MW |
1824 | sector_size = read_capacity_16(sdkp, sdp, buffer); |
1825 | if (sector_size == -EOVERFLOW) | |
1da177e4 | 1826 | goto got_data; |
2b301307 MW |
1827 | if (sector_size == -ENODEV) |
1828 | return; | |
1829 | if (sector_size < 0) | |
1830 | sector_size = read_capacity_10(sdkp, sdp, buffer); | |
0da205e0 MW |
1831 | if (sector_size < 0) |
1832 | return; | |
1da177e4 | 1833 | } else { |
0da205e0 MW |
1834 | sector_size = read_capacity_10(sdkp, sdp, buffer); |
1835 | if (sector_size == -EOVERFLOW) | |
1836 | goto got_data; | |
1837 | if (sector_size < 0) | |
1838 | return; | |
1839 | if ((sizeof(sdkp->capacity) > 4) && | |
1840 | (sdkp->capacity > 0xffffffffULL)) { | |
1841 | int old_sector_size = sector_size; | |
1842 | sd_printk(KERN_NOTICE, sdkp, "Very big device. " | |
1843 | "Trying to use READ CAPACITY(16).\n"); | |
1844 | sector_size = read_capacity_16(sdkp, sdp, buffer); | |
1845 | if (sector_size < 0) { | |
1846 | sd_printk(KERN_NOTICE, sdkp, | |
1847 | "Using 0xffffffff as device size\n"); | |
1848 | sdkp->capacity = 1 + (sector_t) 0xffffffff; | |
1849 | sector_size = old_sector_size; | |
1850 | goto got_data; | |
1851 | } | |
1852 | } | |
1853 | } | |
1da177e4 | 1854 | |
5c211caa AS |
1855 | /* Some devices are known to return the total number of blocks, |
1856 | * not the highest block number. Some devices have versions | |
1857 | * which do this and others which do not. Some devices we might | |
1858 | * suspect of doing this but we don't know for certain. | |
1859 | * | |
1860 | * If we know the reported capacity is wrong, decrement it. If | |
1861 | * we can only guess, then assume the number of blocks is even | |
1862 | * (usually true but not always) and err on the side of lowering | |
1863 | * the capacity. | |
1864 | */ | |
1865 | if (sdp->fix_capacity || | |
1866 | (sdp->guess_capacity && (sdkp->capacity & 0x01))) { | |
1867 | sd_printk(KERN_INFO, sdkp, "Adjusting the sector count " | |
1868 | "from its reported value: %llu\n", | |
1869 | (unsigned long long) sdkp->capacity); | |
1da177e4 | 1870 | --sdkp->capacity; |
61bf54b7 ON |
1871 | } |
1872 | ||
1da177e4 LT |
1873 | got_data: |
1874 | if (sector_size == 0) { | |
1875 | sector_size = 512; | |
e73aec82 MP |
1876 | sd_printk(KERN_NOTICE, sdkp, "Sector size 0 reported, " |
1877 | "assuming 512.\n"); | |
1da177e4 LT |
1878 | } |
1879 | ||
1880 | if (sector_size != 512 && | |
1881 | sector_size != 1024 && | |
1882 | sector_size != 2048 && | |
1883 | sector_size != 4096 && | |
1884 | sector_size != 256) { | |
e73aec82 MP |
1885 | sd_printk(KERN_NOTICE, sdkp, "Unsupported sector size %d.\n", |
1886 | sector_size); | |
1da177e4 LT |
1887 | /* |
1888 | * The user might want to re-format the drive with | |
1889 | * a supported sectorsize. Once this happens, it | |
1890 | * would be relatively trivial to set the thing up. | |
1891 | * For this reason, we leave the thing in the table. | |
1892 | */ | |
1893 | sdkp->capacity = 0; | |
1894 | /* | |
1895 | * set a bogus sector size so the normal read/write | |
1896 | * logic in the block layer will eventually refuse any | |
1897 | * request on this device without tripping over power | |
1898 | * of two sector size assumptions | |
1899 | */ | |
1900 | sector_size = 512; | |
1901 | } | |
e1defc4f | 1902 | blk_queue_logical_block_size(sdp->request_queue, sector_size); |
7404ad3b | 1903 | |
1da177e4 | 1904 | { |
7404ad3b | 1905 | char cap_str_2[10], cap_str_10[10]; |
520a2c27 | 1906 | u64 sz = (u64)sdkp->capacity << ilog2(sector_size); |
1da177e4 | 1907 | |
7404ad3b JB |
1908 | string_get_size(sz, STRING_UNITS_2, cap_str_2, |
1909 | sizeof(cap_str_2)); | |
1910 | string_get_size(sz, STRING_UNITS_10, cap_str_10, | |
1911 | sizeof(cap_str_10)); | |
1da177e4 | 1912 | |
ea09bcc9 | 1913 | if (sdkp->first_scan || old_capacity != sdkp->capacity) { |
70a9b873 | 1914 | sd_printk(KERN_NOTICE, sdkp, |
ea09bcc9 | 1915 | "%llu %d-byte logical blocks: (%s/%s)\n", |
70a9b873 MP |
1916 | (unsigned long long)sdkp->capacity, |
1917 | sector_size, cap_str_10, cap_str_2); | |
ea09bcc9 | 1918 | |
526f7c79 | 1919 | if (sdkp->physical_block_size != sector_size) |
ea09bcc9 MP |
1920 | sd_printk(KERN_NOTICE, sdkp, |
1921 | "%u-byte physical blocks\n", | |
526f7c79 | 1922 | sdkp->physical_block_size); |
ea09bcc9 | 1923 | } |
1da177e4 LT |
1924 | } |
1925 | ||
1926 | /* Rescale capacity to 512-byte units */ | |
1927 | if (sector_size == 4096) | |
1928 | sdkp->capacity <<= 3; | |
1929 | else if (sector_size == 2048) | |
1930 | sdkp->capacity <<= 2; | |
1931 | else if (sector_size == 1024) | |
1932 | sdkp->capacity <<= 1; | |
1933 | else if (sector_size == 256) | |
1934 | sdkp->capacity >>= 1; | |
1935 | ||
526f7c79 MP |
1936 | blk_queue_physical_block_size(sdp->request_queue, |
1937 | sdkp->physical_block_size); | |
1da177e4 LT |
1938 | sdkp->device->sector_size = sector_size; |
1939 | } | |
1940 | ||
1941 | /* called with buffer of length 512 */ | |
1942 | static inline int | |
ea73a9f2 JB |
1943 | sd_do_mode_sense(struct scsi_device *sdp, int dbd, int modepage, |
1944 | unsigned char *buffer, int len, struct scsi_mode_data *data, | |
1945 | struct scsi_sense_hdr *sshdr) | |
1da177e4 | 1946 | { |
ea73a9f2 | 1947 | return scsi_mode_sense(sdp, dbd, modepage, buffer, len, |
1cf72699 | 1948 | SD_TIMEOUT, SD_MAX_RETRIES, data, |
ea73a9f2 | 1949 | sshdr); |
1da177e4 LT |
1950 | } |
1951 | ||
1952 | /* | |
1953 | * read write protect setting, if possible - called only in sd_revalidate_disk() | |
48970800 | 1954 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
1955 | */ |
1956 | static void | |
e73aec82 | 1957 | sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer) |
ea73a9f2 | 1958 | { |
1da177e4 | 1959 | int res; |
ea73a9f2 | 1960 | struct scsi_device *sdp = sdkp->device; |
1da177e4 | 1961 | struct scsi_mode_data data; |
70a9b873 | 1962 | int old_wp = sdkp->write_prot; |
1da177e4 LT |
1963 | |
1964 | set_disk_ro(sdkp->disk, 0); | |
ea73a9f2 | 1965 | if (sdp->skip_ms_page_3f) { |
e73aec82 | 1966 | sd_printk(KERN_NOTICE, sdkp, "Assuming Write Enabled\n"); |
1da177e4 LT |
1967 | return; |
1968 | } | |
1969 | ||
ea73a9f2 JB |
1970 | if (sdp->use_192_bytes_for_3f) { |
1971 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 192, &data, NULL); | |
1da177e4 LT |
1972 | } else { |
1973 | /* | |
1974 | * First attempt: ask for all pages (0x3F), but only 4 bytes. | |
1975 | * We have to start carefully: some devices hang if we ask | |
1976 | * for more than is available. | |
1977 | */ | |
ea73a9f2 | 1978 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 4, &data, NULL); |
1da177e4 LT |
1979 | |
1980 | /* | |
1981 | * Second attempt: ask for page 0 When only page 0 is | |
1982 | * implemented, a request for page 3F may return Sense Key | |
1983 | * 5: Illegal Request, Sense Code 24: Invalid field in | |
1984 | * CDB. | |
1985 | */ | |
1986 | if (!scsi_status_is_good(res)) | |
ea73a9f2 | 1987 | res = sd_do_mode_sense(sdp, 0, 0, buffer, 4, &data, NULL); |
1da177e4 LT |
1988 | |
1989 | /* | |
1990 | * Third attempt: ask 255 bytes, as we did earlier. | |
1991 | */ | |
1992 | if (!scsi_status_is_good(res)) | |
ea73a9f2 JB |
1993 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 255, |
1994 | &data, NULL); | |
1da177e4 LT |
1995 | } |
1996 | ||
1997 | if (!scsi_status_is_good(res)) { | |
e73aec82 MP |
1998 | sd_printk(KERN_WARNING, sdkp, |
1999 | "Test WP failed, assume Write Enabled\n"); | |
1da177e4 LT |
2000 | } else { |
2001 | sdkp->write_prot = ((data.device_specific & 0x80) != 0); | |
2002 | set_disk_ro(sdkp->disk, sdkp->write_prot); | |
70a9b873 MP |
2003 | if (sdkp->first_scan || old_wp != sdkp->write_prot) { |
2004 | sd_printk(KERN_NOTICE, sdkp, "Write Protect is %s\n", | |
2005 | sdkp->write_prot ? "on" : "off"); | |
2006 | sd_printk(KERN_DEBUG, sdkp, | |
2007 | "Mode Sense: %02x %02x %02x %02x\n", | |
2008 | buffer[0], buffer[1], buffer[2], buffer[3]); | |
2009 | } | |
1da177e4 LT |
2010 | } |
2011 | } | |
2012 | ||
2013 | /* | |
2014 | * sd_read_cache_type - called only from sd_revalidate_disk() | |
48970800 | 2015 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
2016 | */ |
2017 | static void | |
e73aec82 | 2018 | sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer) |
631e8a13 | 2019 | { |
1da177e4 | 2020 | int len = 0, res; |
ea73a9f2 | 2021 | struct scsi_device *sdp = sdkp->device; |
1da177e4 | 2022 | |
631e8a13 AV |
2023 | int dbd; |
2024 | int modepage; | |
1da177e4 LT |
2025 | struct scsi_mode_data data; |
2026 | struct scsi_sense_hdr sshdr; | |
70a9b873 MP |
2027 | int old_wce = sdkp->WCE; |
2028 | int old_rcd = sdkp->RCD; | |
2029 | int old_dpofua = sdkp->DPOFUA; | |
1da177e4 | 2030 | |
3dea642a JB |
2031 | if (sdp->skip_ms_page_8) |
2032 | goto defaults; | |
2033 | ||
2034 | if (sdp->type == TYPE_RBC) { | |
631e8a13 AV |
2035 | modepage = 6; |
2036 | dbd = 8; | |
2037 | } else { | |
2038 | modepage = 8; | |
2039 | dbd = 0; | |
2040 | } | |
2041 | ||
1da177e4 | 2042 | /* cautiously ask */ |
ea73a9f2 | 2043 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, 4, &data, &sshdr); |
1da177e4 LT |
2044 | |
2045 | if (!scsi_status_is_good(res)) | |
2046 | goto bad_sense; | |
2047 | ||
6d73c851 AV |
2048 | if (!data.header_length) { |
2049 | modepage = 6; | |
e73aec82 | 2050 | sd_printk(KERN_ERR, sdkp, "Missing header in MODE_SENSE response\n"); |
6d73c851 AV |
2051 | } |
2052 | ||
1da177e4 LT |
2053 | /* that went OK, now ask for the proper length */ |
2054 | len = data.length; | |
2055 | ||
2056 | /* | |
2057 | * We're only interested in the first three bytes, actually. | |
2058 | * But the data cache page is defined for the first 20. | |
2059 | */ | |
2060 | if (len < 3) | |
2061 | goto bad_sense; | |
3dea642a JB |
2062 | if (len > 20) |
2063 | len = 20; | |
2064 | ||
2065 | /* Take headers and block descriptors into account */ | |
2066 | len += data.header_length + data.block_descriptor_length; | |
2067 | if (len > SD_BUF_SIZE) | |
2068 | goto bad_sense; | |
1da177e4 LT |
2069 | |
2070 | /* Get the data */ | |
ea73a9f2 | 2071 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, len, &data, &sshdr); |
1da177e4 LT |
2072 | |
2073 | if (scsi_status_is_good(res)) { | |
631e8a13 | 2074 | int offset = data.header_length + data.block_descriptor_length; |
1da177e4 | 2075 | |
3dea642a JB |
2076 | if (offset >= SD_BUF_SIZE - 2) { |
2077 | sd_printk(KERN_ERR, sdkp, "Malformed MODE SENSE response\n"); | |
2078 | goto defaults; | |
48970800 AV |
2079 | } |
2080 | ||
3dea642a | 2081 | if ((buffer[offset] & 0x3f) != modepage) { |
e73aec82 | 2082 | sd_printk(KERN_ERR, sdkp, "Got wrong page\n"); |
631e8a13 AV |
2083 | goto defaults; |
2084 | } | |
3dea642a | 2085 | |
631e8a13 AV |
2086 | if (modepage == 8) { |
2087 | sdkp->WCE = ((buffer[offset + 2] & 0x04) != 0); | |
2088 | sdkp->RCD = ((buffer[offset + 2] & 0x01) != 0); | |
2089 | } else { | |
2090 | sdkp->WCE = ((buffer[offset + 2] & 0x01) == 0); | |
2091 | sdkp->RCD = 0; | |
2092 | } | |
1da177e4 | 2093 | |
007365ad TH |
2094 | sdkp->DPOFUA = (data.device_specific & 0x10) != 0; |
2095 | if (sdkp->DPOFUA && !sdkp->device->use_10_for_rw) { | |
e73aec82 MP |
2096 | sd_printk(KERN_NOTICE, sdkp, |
2097 | "Uses READ/WRITE(6), disabling FUA\n"); | |
007365ad TH |
2098 | sdkp->DPOFUA = 0; |
2099 | } | |
2100 | ||
70a9b873 MP |
2101 | if (sdkp->first_scan || old_wce != sdkp->WCE || |
2102 | old_rcd != sdkp->RCD || old_dpofua != sdkp->DPOFUA) | |
2103 | sd_printk(KERN_NOTICE, sdkp, | |
2104 | "Write cache: %s, read cache: %s, %s\n", | |
2105 | sdkp->WCE ? "enabled" : "disabled", | |
2106 | sdkp->RCD ? "disabled" : "enabled", | |
2107 | sdkp->DPOFUA ? "supports DPO and FUA" | |
2108 | : "doesn't support DPO or FUA"); | |
1da177e4 LT |
2109 | |
2110 | return; | |
2111 | } | |
2112 | ||
2113 | bad_sense: | |
ea73a9f2 | 2114 | if (scsi_sense_valid(&sshdr) && |
1da177e4 LT |
2115 | sshdr.sense_key == ILLEGAL_REQUEST && |
2116 | sshdr.asc == 0x24 && sshdr.ascq == 0x0) | |
e73aec82 MP |
2117 | /* Invalid field in CDB */ |
2118 | sd_printk(KERN_NOTICE, sdkp, "Cache data unavailable\n"); | |
1da177e4 | 2119 | else |
e73aec82 | 2120 | sd_printk(KERN_ERR, sdkp, "Asking for cache data failed\n"); |
1da177e4 LT |
2121 | |
2122 | defaults: | |
e73aec82 | 2123 | sd_printk(KERN_ERR, sdkp, "Assuming drive cache: write through\n"); |
1da177e4 LT |
2124 | sdkp->WCE = 0; |
2125 | sdkp->RCD = 0; | |
48970800 | 2126 | sdkp->DPOFUA = 0; |
1da177e4 LT |
2127 | } |
2128 | ||
e0597d70 MP |
2129 | /* |
2130 | * The ATO bit indicates whether the DIF application tag is available | |
2131 | * for use by the operating system. | |
2132 | */ | |
439d77f7 | 2133 | static void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer) |
e0597d70 MP |
2134 | { |
2135 | int res, offset; | |
2136 | struct scsi_device *sdp = sdkp->device; | |
2137 | struct scsi_mode_data data; | |
2138 | struct scsi_sense_hdr sshdr; | |
2139 | ||
2140 | if (sdp->type != TYPE_DISK) | |
2141 | return; | |
2142 | ||
2143 | if (sdkp->protection_type == 0) | |
2144 | return; | |
2145 | ||
2146 | res = scsi_mode_sense(sdp, 1, 0x0a, buffer, 36, SD_TIMEOUT, | |
2147 | SD_MAX_RETRIES, &data, &sshdr); | |
2148 | ||
2149 | if (!scsi_status_is_good(res) || !data.header_length || | |
2150 | data.length < 6) { | |
2151 | sd_printk(KERN_WARNING, sdkp, | |
2152 | "getting Control mode page failed, assume no ATO\n"); | |
2153 | ||
2154 | if (scsi_sense_valid(&sshdr)) | |
2155 | sd_print_sense_hdr(sdkp, &sshdr); | |
2156 | ||
2157 | return; | |
2158 | } | |
2159 | ||
2160 | offset = data.header_length + data.block_descriptor_length; | |
2161 | ||
2162 | if ((buffer[offset] & 0x3f) != 0x0a) { | |
2163 | sd_printk(KERN_ERR, sdkp, "ATO Got wrong page\n"); | |
2164 | return; | |
2165 | } | |
2166 | ||
2167 | if ((buffer[offset + 5] & 0x80) == 0) | |
2168 | return; | |
2169 | ||
2170 | sdkp->ATO = 1; | |
2171 | ||
2172 | return; | |
2173 | } | |
2174 | ||
d11b6916 MP |
2175 | /** |
2176 | * sd_read_block_limits - Query disk device for preferred I/O sizes. | |
2177 | * @disk: disk to query | |
2178 | */ | |
2179 | static void sd_read_block_limits(struct scsi_disk *sdkp) | |
2180 | { | |
2181 | unsigned int sector_sz = sdkp->device->sector_size; | |
bb2d3de1 | 2182 | const int vpd_len = 64; |
e3deec09 | 2183 | unsigned char *buffer = kmalloc(vpd_len, GFP_KERNEL); |
d11b6916 | 2184 | |
e3deec09 JB |
2185 | if (!buffer || |
2186 | /* Block Limits VPD */ | |
2187 | scsi_get_vpd_page(sdkp->device, 0xb0, buffer, vpd_len)) | |
2188 | goto out; | |
d11b6916 MP |
2189 | |
2190 | blk_queue_io_min(sdkp->disk->queue, | |
2191 | get_unaligned_be16(&buffer[6]) * sector_sz); | |
2192 | blk_queue_io_opt(sdkp->disk->queue, | |
2193 | get_unaligned_be32(&buffer[12]) * sector_sz); | |
2194 | ||
c98a0eb0 MP |
2195 | if (buffer[3] == 0x3c) { |
2196 | unsigned int lba_count, desc_count; | |
e339c1a7 | 2197 | |
c98a0eb0 MP |
2198 | sdkp->max_ws_blocks = |
2199 | (u32) min_not_zero(get_unaligned_be64(&buffer[36]), | |
2200 | (u64)0xffffffff); | |
e339c1a7 | 2201 | |
c98a0eb0 | 2202 | if (!sdkp->lbpme) |
045d3fe7 | 2203 | goto out; |
045d3fe7 | 2204 | |
c98a0eb0 MP |
2205 | lba_count = get_unaligned_be32(&buffer[20]); |
2206 | desc_count = get_unaligned_be32(&buffer[24]); | |
045d3fe7 | 2207 | |
c98a0eb0 MP |
2208 | if (lba_count && desc_count) |
2209 | sdkp->max_unmap_blocks = lba_count; | |
e339c1a7 | 2210 | |
c98a0eb0 | 2211 | sdkp->unmap_granularity = get_unaligned_be32(&buffer[28]); |
e339c1a7 MP |
2212 | |
2213 | if (buffer[32] & 0x80) | |
c98a0eb0 | 2214 | sdkp->unmap_alignment = |
e339c1a7 | 2215 | get_unaligned_be32(&buffer[32]) & ~(1 << 31); |
c98a0eb0 MP |
2216 | |
2217 | if (!sdkp->lbpvpd) { /* LBP VPD page not provided */ | |
2218 | ||
2219 | if (sdkp->max_unmap_blocks) | |
2220 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
2221 | else | |
2222 | sd_config_discard(sdkp, SD_LBP_WS16); | |
2223 | ||
2224 | } else { /* LBP VPD page tells us what to use */ | |
2225 | ||
2226 | if (sdkp->lbpu && sdkp->max_unmap_blocks) | |
2227 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
2228 | else if (sdkp->lbpws) | |
2229 | sd_config_discard(sdkp, SD_LBP_WS16); | |
2230 | else if (sdkp->lbpws10) | |
2231 | sd_config_discard(sdkp, SD_LBP_WS10); | |
2232 | else | |
2233 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
2234 | } | |
e339c1a7 MP |
2235 | } |
2236 | ||
e3deec09 | 2237 | out: |
d11b6916 MP |
2238 | kfree(buffer); |
2239 | } | |
2240 | ||
3821d768 MP |
2241 | /** |
2242 | * sd_read_block_characteristics - Query block dev. characteristics | |
2243 | * @disk: disk to query | |
2244 | */ | |
2245 | static void sd_read_block_characteristics(struct scsi_disk *sdkp) | |
2246 | { | |
e3deec09 | 2247 | unsigned char *buffer; |
3821d768 | 2248 | u16 rot; |
bb2d3de1 | 2249 | const int vpd_len = 64; |
3821d768 | 2250 | |
e3deec09 | 2251 | buffer = kmalloc(vpd_len, GFP_KERNEL); |
3821d768 | 2252 | |
e3deec09 JB |
2253 | if (!buffer || |
2254 | /* Block Device Characteristics VPD */ | |
2255 | scsi_get_vpd_page(sdkp->device, 0xb1, buffer, vpd_len)) | |
2256 | goto out; | |
3821d768 MP |
2257 | |
2258 | rot = get_unaligned_be16(&buffer[4]); | |
2259 | ||
2260 | if (rot == 1) | |
2261 | queue_flag_set_unlocked(QUEUE_FLAG_NONROT, sdkp->disk->queue); | |
2262 | ||
e3deec09 | 2263 | out: |
3821d768 MP |
2264 | kfree(buffer); |
2265 | } | |
2266 | ||
045d3fe7 | 2267 | /** |
c98a0eb0 | 2268 | * sd_read_block_provisioning - Query provisioning VPD page |
045d3fe7 MP |
2269 | * @disk: disk to query |
2270 | */ | |
c98a0eb0 | 2271 | static void sd_read_block_provisioning(struct scsi_disk *sdkp) |
045d3fe7 MP |
2272 | { |
2273 | unsigned char *buffer; | |
2274 | const int vpd_len = 8; | |
2275 | ||
c98a0eb0 | 2276 | if (sdkp->lbpme == 0) |
045d3fe7 MP |
2277 | return; |
2278 | ||
2279 | buffer = kmalloc(vpd_len, GFP_KERNEL); | |
2280 | ||
2281 | if (!buffer || scsi_get_vpd_page(sdkp->device, 0xb2, buffer, vpd_len)) | |
2282 | goto out; | |
2283 | ||
c98a0eb0 MP |
2284 | sdkp->lbpvpd = 1; |
2285 | sdkp->lbpu = (buffer[5] >> 7) & 1; /* UNMAP */ | |
2286 | sdkp->lbpws = (buffer[5] >> 6) & 1; /* WRITE SAME(16) with UNMAP */ | |
2287 | sdkp->lbpws10 = (buffer[5] >> 5) & 1; /* WRITE SAME(10) with UNMAP */ | |
045d3fe7 MP |
2288 | |
2289 | out: | |
2290 | kfree(buffer); | |
2291 | } | |
2292 | ||
ffd4bc2a MP |
2293 | static int sd_try_extended_inquiry(struct scsi_device *sdp) |
2294 | { | |
2295 | /* | |
2296 | * Although VPD inquiries can go to SCSI-2 type devices, | |
2297 | * some USB ones crash on receiving them, and the pages | |
2298 | * we currently ask for are for SPC-3 and beyond | |
2299 | */ | |
2300 | if (sdp->scsi_level > SCSI_SPC_2) | |
2301 | return 1; | |
2302 | return 0; | |
2303 | } | |
2304 | ||
1da177e4 LT |
2305 | /** |
2306 | * sd_revalidate_disk - called the first time a new disk is seen, | |
2307 | * performs disk spin up, read_capacity, etc. | |
2308 | * @disk: struct gendisk we care about | |
2309 | **/ | |
2310 | static int sd_revalidate_disk(struct gendisk *disk) | |
2311 | { | |
2312 | struct scsi_disk *sdkp = scsi_disk(disk); | |
2313 | struct scsi_device *sdp = sdkp->device; | |
1da177e4 | 2314 | unsigned char *buffer; |
4913efe4 | 2315 | unsigned flush = 0; |
1da177e4 | 2316 | |
fa0d34be MP |
2317 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, |
2318 | "sd_revalidate_disk\n")); | |
1da177e4 LT |
2319 | |
2320 | /* | |
2321 | * If the device is offline, don't try and read capacity or any | |
2322 | * of the other niceties. | |
2323 | */ | |
2324 | if (!scsi_device_online(sdp)) | |
2325 | goto out; | |
2326 | ||
a6123f14 | 2327 | buffer = kmalloc(SD_BUF_SIZE, GFP_KERNEL); |
1da177e4 | 2328 | if (!buffer) { |
e73aec82 MP |
2329 | sd_printk(KERN_WARNING, sdkp, "sd_revalidate_disk: Memory " |
2330 | "allocation failure.\n"); | |
ea73a9f2 | 2331 | goto out; |
1da177e4 LT |
2332 | } |
2333 | ||
e73aec82 | 2334 | sd_spinup_disk(sdkp); |
1da177e4 LT |
2335 | |
2336 | /* | |
2337 | * Without media there is no reason to ask; moreover, some devices | |
2338 | * react badly if we do. | |
2339 | */ | |
2340 | if (sdkp->media_present) { | |
e73aec82 | 2341 | sd_read_capacity(sdkp, buffer); |
ffd4bc2a MP |
2342 | |
2343 | if (sd_try_extended_inquiry(sdp)) { | |
c98a0eb0 | 2344 | sd_read_block_provisioning(sdkp); |
ffd4bc2a MP |
2345 | sd_read_block_limits(sdkp); |
2346 | sd_read_block_characteristics(sdkp); | |
2347 | } | |
2348 | ||
e73aec82 MP |
2349 | sd_read_write_protect_flag(sdkp, buffer); |
2350 | sd_read_cache_type(sdkp, buffer); | |
e0597d70 | 2351 | sd_read_app_tag_own(sdkp, buffer); |
1da177e4 | 2352 | } |
461d4e90 | 2353 | |
70a9b873 MP |
2354 | sdkp->first_scan = 0; |
2355 | ||
461d4e90 TH |
2356 | /* |
2357 | * We now have all cache related info, determine how we deal | |
4913efe4 | 2358 | * with flush requests. |
461d4e90 | 2359 | */ |
4913efe4 TH |
2360 | if (sdkp->WCE) { |
2361 | flush |= REQ_FLUSH; | |
2362 | if (sdkp->DPOFUA) | |
2363 | flush |= REQ_FUA; | |
2364 | } | |
461d4e90 | 2365 | |
4913efe4 | 2366 | blk_queue_flush(sdkp->disk->queue, flush); |
461d4e90 | 2367 | |
1da177e4 LT |
2368 | set_capacity(disk, sdkp->capacity); |
2369 | kfree(buffer); | |
2370 | ||
1da177e4 LT |
2371 | out: |
2372 | return 0; | |
2373 | } | |
2374 | ||
72ec24bd TH |
2375 | /** |
2376 | * sd_unlock_native_capacity - unlock native capacity | |
2377 | * @disk: struct gendisk to set capacity for | |
2378 | * | |
2379 | * Block layer calls this function if it detects that partitions | |
2380 | * on @disk reach beyond the end of the device. If the SCSI host | |
2381 | * implements ->unlock_native_capacity() method, it's invoked to | |
2382 | * give it a chance to adjust the device capacity. | |
2383 | * | |
2384 | * CONTEXT: | |
2385 | * Defined by block layer. Might sleep. | |
2386 | */ | |
2387 | static void sd_unlock_native_capacity(struct gendisk *disk) | |
2388 | { | |
2389 | struct scsi_device *sdev = scsi_disk(disk)->device; | |
2390 | ||
2391 | if (sdev->host->hostt->unlock_native_capacity) | |
2392 | sdev->host->hostt->unlock_native_capacity(sdev); | |
2393 | } | |
2394 | ||
3e1a7ff8 TH |
2395 | /** |
2396 | * sd_format_disk_name - format disk name | |
2397 | * @prefix: name prefix - ie. "sd" for SCSI disks | |
2398 | * @index: index of the disk to format name for | |
2399 | * @buf: output buffer | |
2400 | * @buflen: length of the output buffer | |
2401 | * | |
2402 | * SCSI disk names starts at sda. The 26th device is sdz and the | |
2403 | * 27th is sdaa. The last one for two lettered suffix is sdzz | |
2404 | * which is followed by sdaaa. | |
2405 | * | |
2406 | * This is basically 26 base counting with one extra 'nil' entry | |
3ad2f3fb | 2407 | * at the beginning from the second digit on and can be |
3e1a7ff8 TH |
2408 | * determined using similar method as 26 base conversion with the |
2409 | * index shifted -1 after each digit is computed. | |
2410 | * | |
2411 | * CONTEXT: | |
2412 | * Don't care. | |
2413 | * | |
2414 | * RETURNS: | |
2415 | * 0 on success, -errno on failure. | |
2416 | */ | |
2417 | static int sd_format_disk_name(char *prefix, int index, char *buf, int buflen) | |
2418 | { | |
2419 | const int base = 'z' - 'a' + 1; | |
2420 | char *begin = buf + strlen(prefix); | |
2421 | char *end = buf + buflen; | |
2422 | char *p; | |
2423 | int unit; | |
2424 | ||
2425 | p = end - 1; | |
2426 | *p = '\0'; | |
2427 | unit = base; | |
2428 | do { | |
2429 | if (p == begin) | |
2430 | return -EINVAL; | |
2431 | *--p = 'a' + (index % unit); | |
2432 | index = (index / unit) - 1; | |
2433 | } while (index >= 0); | |
2434 | ||
2435 | memmove(begin, p, end - p); | |
2436 | memcpy(buf, prefix, strlen(prefix)); | |
2437 | ||
2438 | return 0; | |
2439 | } | |
2440 | ||
4ace92fc AV |
2441 | /* |
2442 | * The asynchronous part of sd_probe | |
2443 | */ | |
2444 | static void sd_probe_async(void *data, async_cookie_t cookie) | |
2445 | { | |
2446 | struct scsi_disk *sdkp = data; | |
2447 | struct scsi_device *sdp; | |
2448 | struct gendisk *gd; | |
2449 | u32 index; | |
2450 | struct device *dev; | |
2451 | ||
2452 | sdp = sdkp->device; | |
2453 | gd = sdkp->disk; | |
2454 | index = sdkp->index; | |
2455 | dev = &sdp->sdev_gendev; | |
2456 | ||
1a03ae0f MR |
2457 | gd->major = sd_major((index & 0xf0) >> 4); |
2458 | gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00); | |
2459 | gd->minors = SD_MINORS; | |
2460 | ||
4ace92fc AV |
2461 | gd->fops = &sd_fops; |
2462 | gd->private_data = &sdkp->driver; | |
2463 | gd->queue = sdkp->device->request_queue; | |
2464 | ||
70a9b873 MP |
2465 | /* defaults, until the device tells us otherwise */ |
2466 | sdp->sector_size = 512; | |
2467 | sdkp->capacity = 0; | |
2468 | sdkp->media_present = 1; | |
2469 | sdkp->write_prot = 0; | |
2470 | sdkp->WCE = 0; | |
2471 | sdkp->RCD = 0; | |
2472 | sdkp->ATO = 0; | |
2473 | sdkp->first_scan = 1; | |
2474 | ||
4ace92fc AV |
2475 | sd_revalidate_disk(gd); |
2476 | ||
2477 | blk_queue_prep_rq(sdp->request_queue, sd_prep_fn); | |
f1126e95 | 2478 | blk_queue_unprep_rq(sdp->request_queue, sd_unprep_fn); |
4ace92fc AV |
2479 | |
2480 | gd->driverfs_dev = &sdp->sdev_gendev; | |
97fedbbe | 2481 | gd->flags = GENHD_FL_EXT_DEVT; |
2bae0093 | 2482 | if (sdp->removable) { |
4ace92fc | 2483 | gd->flags |= GENHD_FL_REMOVABLE; |
2bae0093 TH |
2484 | gd->events |= DISK_EVENT_MEDIA_CHANGE; |
2485 | } | |
4ace92fc | 2486 | |
4ace92fc AV |
2487 | add_disk(gd); |
2488 | sd_dif_config_host(sdkp); | |
2489 | ||
3821d768 MP |
2490 | sd_revalidate_disk(gd); |
2491 | ||
4ace92fc AV |
2492 | sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n", |
2493 | sdp->removable ? "removable " : ""); | |
478a8a05 | 2494 | scsi_autopm_put_device(sdp); |
ea038f63 | 2495 | put_device(&sdkp->dev); |
4ace92fc AV |
2496 | } |
2497 | ||
1da177e4 LT |
2498 | /** |
2499 | * sd_probe - called during driver initialization and whenever a | |
2500 | * new scsi device is attached to the system. It is called once | |
2501 | * for each scsi device (not just disks) present. | |
2502 | * @dev: pointer to device object | |
2503 | * | |
2504 | * Returns 0 if successful (or not interested in this scsi device | |
2505 | * (e.g. scanner)); 1 when there is an error. | |
2506 | * | |
2507 | * Note: this function is invoked from the scsi mid-level. | |
2508 | * This function sets up the mapping between a given | |
2509 | * <host,channel,id,lun> (found in sdp) and new device name | |
2510 | * (e.g. /dev/sda). More precisely it is the block device major | |
2511 | * and minor number that is chosen here. | |
2512 | * | |
2513 | * Assume sd_attach is not re-entrant (for time being) | |
2514 | * Also think about sd_attach() and sd_remove() running coincidentally. | |
2515 | **/ | |
2516 | static int sd_probe(struct device *dev) | |
2517 | { | |
2518 | struct scsi_device *sdp = to_scsi_device(dev); | |
2519 | struct scsi_disk *sdkp; | |
2520 | struct gendisk *gd; | |
439d77f7 | 2521 | int index; |
1da177e4 LT |
2522 | int error; |
2523 | ||
2524 | error = -ENODEV; | |
631e8a13 | 2525 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_MOD && sdp->type != TYPE_RBC) |
1da177e4 LT |
2526 | goto out; |
2527 | ||
9ccfc756 JB |
2528 | SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO, sdp, |
2529 | "sd_attach\n")); | |
1da177e4 LT |
2530 | |
2531 | error = -ENOMEM; | |
24669f75 | 2532 | sdkp = kzalloc(sizeof(*sdkp), GFP_KERNEL); |
1da177e4 LT |
2533 | if (!sdkp) |
2534 | goto out; | |
2535 | ||
689d6fac | 2536 | gd = alloc_disk(SD_MINORS); |
1da177e4 LT |
2537 | if (!gd) |
2538 | goto out_free; | |
2539 | ||
f27bac27 TH |
2540 | do { |
2541 | if (!ida_pre_get(&sd_index_ida, GFP_KERNEL)) | |
2542 | goto out_put; | |
1da177e4 | 2543 | |
4034cc68 | 2544 | spin_lock(&sd_index_lock); |
f27bac27 | 2545 | error = ida_get_new(&sd_index_ida, &index); |
4034cc68 | 2546 | spin_unlock(&sd_index_lock); |
f27bac27 | 2547 | } while (error == -EAGAIN); |
1da177e4 | 2548 | |
1da177e4 LT |
2549 | if (error) |
2550 | goto out_put; | |
2551 | ||
1a03ae0f MR |
2552 | if (index >= SD_MAX_DISKS) { |
2553 | error = -ENODEV; | |
2554 | sdev_printk(KERN_WARNING, sdp, "SCSI disk (sd) name space exhausted.\n"); | |
2555 | goto out_free_index; | |
2556 | } | |
2557 | ||
3e1a7ff8 TH |
2558 | error = sd_format_disk_name("sd", index, gd->disk_name, DISK_NAME_LEN); |
2559 | if (error) | |
f27bac27 TH |
2560 | goto out_free_index; |
2561 | ||
1da177e4 LT |
2562 | sdkp->device = sdp; |
2563 | sdkp->driver = &sd_template; | |
2564 | sdkp->disk = gd; | |
2565 | sdkp->index = index; | |
409f3499 | 2566 | atomic_set(&sdkp->openers, 0); |
1da177e4 | 2567 | |
601e7638 JB |
2568 | if (!sdp->request_queue->rq_timeout) { |
2569 | if (sdp->type != TYPE_MOD) | |
2570 | blk_queue_rq_timeout(sdp->request_queue, SD_TIMEOUT); | |
2571 | else | |
2572 | blk_queue_rq_timeout(sdp->request_queue, | |
2573 | SD_MOD_TIMEOUT); | |
2574 | } | |
2575 | ||
2576 | device_initialize(&sdkp->dev); | |
478a8a05 | 2577 | sdkp->dev.parent = dev; |
601e7638 | 2578 | sdkp->dev.class = &sd_disk_class; |
478a8a05 | 2579 | dev_set_name(&sdkp->dev, dev_name(dev)); |
601e7638 JB |
2580 | |
2581 | if (device_add(&sdkp->dev)) | |
2582 | goto out_free_index; | |
2583 | ||
478a8a05 AS |
2584 | get_device(dev); |
2585 | dev_set_drvdata(dev, sdkp); | |
601e7638 | 2586 | |
ea038f63 | 2587 | get_device(&sdkp->dev); /* prevent release before async_schedule */ |
4ace92fc | 2588 | async_schedule(sd_probe_async, sdkp); |
1da177e4 LT |
2589 | |
2590 | return 0; | |
2591 | ||
f27bac27 | 2592 | out_free_index: |
4034cc68 | 2593 | spin_lock(&sd_index_lock); |
f27bac27 | 2594 | ida_remove(&sd_index_ida, index); |
4034cc68 | 2595 | spin_unlock(&sd_index_lock); |
6bdaa1f1 | 2596 | out_put: |
1da177e4 | 2597 | put_disk(gd); |
6bdaa1f1 | 2598 | out_free: |
1da177e4 | 2599 | kfree(sdkp); |
6bdaa1f1 | 2600 | out: |
1da177e4 LT |
2601 | return error; |
2602 | } | |
2603 | ||
2604 | /** | |
2605 | * sd_remove - called whenever a scsi disk (previously recognized by | |
2606 | * sd_probe) is detached from the system. It is called (potentially | |
2607 | * multiple times) during sd module unload. | |
2608 | * @sdp: pointer to mid level scsi device object | |
2609 | * | |
2610 | * Note: this function is invoked from the scsi mid-level. | |
2611 | * This function potentially frees up a device name (e.g. /dev/sdc) | |
2612 | * that could be re-used by a subsequent sd_probe(). | |
2613 | * This function is not called when the built-in sd driver is "exit-ed". | |
2614 | **/ | |
2615 | static int sd_remove(struct device *dev) | |
2616 | { | |
601e7638 | 2617 | struct scsi_disk *sdkp; |
1da177e4 | 2618 | |
601e7638 | 2619 | sdkp = dev_get_drvdata(dev); |
478a8a05 AS |
2620 | scsi_autopm_get_device(sdkp->device); |
2621 | ||
2622 | async_synchronize_full(); | |
b391277a | 2623 | blk_queue_prep_rq(sdkp->device->request_queue, scsi_prep_fn); |
82b6d57f | 2624 | blk_queue_unprep_rq(sdkp->device->request_queue, NULL); |
ee959b00 | 2625 | device_del(&sdkp->dev); |
1da177e4 LT |
2626 | del_gendisk(sdkp->disk); |
2627 | sd_shutdown(dev); | |
39b7f1e2 | 2628 | |
0b950672 | 2629 | mutex_lock(&sd_ref_mutex); |
39b7f1e2 | 2630 | dev_set_drvdata(dev, NULL); |
ee959b00 | 2631 | put_device(&sdkp->dev); |
0b950672 | 2632 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
2633 | |
2634 | return 0; | |
2635 | } | |
2636 | ||
2637 | /** | |
2638 | * scsi_disk_release - Called to free the scsi_disk structure | |
ee959b00 | 2639 | * @dev: pointer to embedded class device |
1da177e4 | 2640 | * |
0b950672 | 2641 | * sd_ref_mutex must be held entering this routine. Because it is |
1da177e4 LT |
2642 | * called on last put, you should always use the scsi_disk_get() |
2643 | * scsi_disk_put() helpers which manipulate the semaphore directly | |
ee959b00 | 2644 | * and never do a direct put_device. |
1da177e4 | 2645 | **/ |
ee959b00 | 2646 | static void scsi_disk_release(struct device *dev) |
1da177e4 | 2647 | { |
ee959b00 | 2648 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
1da177e4 LT |
2649 | struct gendisk *disk = sdkp->disk; |
2650 | ||
4034cc68 | 2651 | spin_lock(&sd_index_lock); |
f27bac27 | 2652 | ida_remove(&sd_index_ida, sdkp->index); |
4034cc68 | 2653 | spin_unlock(&sd_index_lock); |
1da177e4 LT |
2654 | |
2655 | disk->private_data = NULL; | |
1da177e4 | 2656 | put_disk(disk); |
39b7f1e2 | 2657 | put_device(&sdkp->device->sdev_gendev); |
1da177e4 LT |
2658 | |
2659 | kfree(sdkp); | |
2660 | } | |
2661 | ||
cc5d2c8c | 2662 | static int sd_start_stop_device(struct scsi_disk *sdkp, int start) |
c3c94c5a TH |
2663 | { |
2664 | unsigned char cmd[6] = { START_STOP }; /* START_VALID */ | |
2665 | struct scsi_sense_hdr sshdr; | |
cc5d2c8c | 2666 | struct scsi_device *sdp = sdkp->device; |
c3c94c5a TH |
2667 | int res; |
2668 | ||
2669 | if (start) | |
2670 | cmd[4] |= 1; /* START */ | |
2671 | ||
d2886ea3 SR |
2672 | if (sdp->start_stop_pwr_cond) |
2673 | cmd[4] |= start ? 1 << 4 : 3 << 4; /* Active or Standby */ | |
2674 | ||
c3c94c5a TH |
2675 | if (!scsi_device_online(sdp)) |
2676 | return -ENODEV; | |
2677 | ||
2678 | res = scsi_execute_req(sdp, cmd, DMA_NONE, NULL, 0, &sshdr, | |
f4f4e47e | 2679 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); |
c3c94c5a | 2680 | if (res) { |
cc5d2c8c JB |
2681 | sd_printk(KERN_WARNING, sdkp, "START_STOP FAILED\n"); |
2682 | sd_print_result(sdkp, res); | |
c3c94c5a | 2683 | if (driver_byte(res) & DRIVER_SENSE) |
cc5d2c8c | 2684 | sd_print_sense_hdr(sdkp, &sshdr); |
c3c94c5a TH |
2685 | } |
2686 | ||
2687 | return res; | |
2688 | } | |
2689 | ||
1da177e4 LT |
2690 | /* |
2691 | * Send a SYNCHRONIZE CACHE instruction down to the device through | |
2692 | * the normal SCSI command structure. Wait for the command to | |
2693 | * complete. | |
2694 | */ | |
2695 | static void sd_shutdown(struct device *dev) | |
2696 | { | |
39b7f1e2 | 2697 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
1da177e4 LT |
2698 | |
2699 | if (!sdkp) | |
2700 | return; /* this can happen */ | |
2701 | ||
39b7f1e2 | 2702 | if (sdkp->WCE) { |
e73aec82 MP |
2703 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
2704 | sd_sync_cache(sdkp); | |
39b7f1e2 | 2705 | } |
c3c94c5a | 2706 | |
cc5d2c8c JB |
2707 | if (system_state != SYSTEM_RESTART && sdkp->device->manage_start_stop) { |
2708 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); | |
2709 | sd_start_stop_device(sdkp, 0); | |
c3c94c5a TH |
2710 | } |
2711 | ||
39b7f1e2 AS |
2712 | scsi_disk_put(sdkp); |
2713 | } | |
1da177e4 | 2714 | |
c3c94c5a TH |
2715 | static int sd_suspend(struct device *dev, pm_message_t mesg) |
2716 | { | |
c3c94c5a | 2717 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
09ff92fe | 2718 | int ret = 0; |
c3c94c5a TH |
2719 | |
2720 | if (!sdkp) | |
2721 | return 0; /* this can happen */ | |
2722 | ||
2723 | if (sdkp->WCE) { | |
cc5d2c8c | 2724 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
c3c94c5a TH |
2725 | ret = sd_sync_cache(sdkp); |
2726 | if (ret) | |
09ff92fe | 2727 | goto done; |
c3c94c5a TH |
2728 | } |
2729 | ||
3a2d5b70 | 2730 | if ((mesg.event & PM_EVENT_SLEEP) && sdkp->device->manage_start_stop) { |
cc5d2c8c JB |
2731 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); |
2732 | ret = sd_start_stop_device(sdkp, 0); | |
c3c94c5a TH |
2733 | } |
2734 | ||
09ff92fe AS |
2735 | done: |
2736 | scsi_disk_put(sdkp); | |
2737 | return ret; | |
c3c94c5a TH |
2738 | } |
2739 | ||
2740 | static int sd_resume(struct device *dev) | |
2741 | { | |
c3c94c5a | 2742 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
09ff92fe | 2743 | int ret = 0; |
c3c94c5a | 2744 | |
cc5d2c8c | 2745 | if (!sdkp->device->manage_start_stop) |
09ff92fe | 2746 | goto done; |
c3c94c5a | 2747 | |
cc5d2c8c | 2748 | sd_printk(KERN_NOTICE, sdkp, "Starting disk\n"); |
09ff92fe | 2749 | ret = sd_start_stop_device(sdkp, 1); |
c3c94c5a | 2750 | |
09ff92fe AS |
2751 | done: |
2752 | scsi_disk_put(sdkp); | |
2753 | return ret; | |
c3c94c5a TH |
2754 | } |
2755 | ||
1da177e4 LT |
2756 | /** |
2757 | * init_sd - entry point for this driver (both when built in or when | |
2758 | * a module). | |
2759 | * | |
2760 | * Note: this function registers this driver with the scsi mid-level. | |
2761 | **/ | |
2762 | static int __init init_sd(void) | |
2763 | { | |
5e4009ba | 2764 | int majors = 0, i, err; |
1da177e4 LT |
2765 | |
2766 | SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n")); | |
2767 | ||
2768 | for (i = 0; i < SD_MAJORS; i++) | |
2769 | if (register_blkdev(sd_major(i), "sd") == 0) | |
2770 | majors++; | |
2771 | ||
2772 | if (!majors) | |
2773 | return -ENODEV; | |
2774 | ||
5e4009ba JG |
2775 | err = class_register(&sd_disk_class); |
2776 | if (err) | |
2777 | goto err_out; | |
6bdaa1f1 | 2778 | |
5e4009ba JG |
2779 | err = scsi_register_driver(&sd_template.gendrv); |
2780 | if (err) | |
2781 | goto err_out_class; | |
2782 | ||
4e7392ec MP |
2783 | sd_cdb_cache = kmem_cache_create("sd_ext_cdb", SD_EXT_CDB_SIZE, |
2784 | 0, 0, NULL); | |
2785 | if (!sd_cdb_cache) { | |
2786 | printk(KERN_ERR "sd: can't init extended cdb cache\n"); | |
2787 | goto err_out_class; | |
2788 | } | |
2789 | ||
2790 | sd_cdb_pool = mempool_create_slab_pool(SD_MEMPOOL_SIZE, sd_cdb_cache); | |
2791 | if (!sd_cdb_pool) { | |
2792 | printk(KERN_ERR "sd: can't init extended cdb pool\n"); | |
2793 | goto err_out_cache; | |
2794 | } | |
2795 | ||
5e4009ba JG |
2796 | return 0; |
2797 | ||
4e7392ec MP |
2798 | err_out_cache: |
2799 | kmem_cache_destroy(sd_cdb_cache); | |
2800 | ||
5e4009ba JG |
2801 | err_out_class: |
2802 | class_unregister(&sd_disk_class); | |
2803 | err_out: | |
2804 | for (i = 0; i < SD_MAJORS; i++) | |
2805 | unregister_blkdev(sd_major(i), "sd"); | |
2806 | return err; | |
1da177e4 LT |
2807 | } |
2808 | ||
2809 | /** | |
2810 | * exit_sd - exit point for this driver (when it is a module). | |
2811 | * | |
2812 | * Note: this function unregisters this driver from the scsi mid-level. | |
2813 | **/ | |
2814 | static void __exit exit_sd(void) | |
2815 | { | |
2816 | int i; | |
2817 | ||
2818 | SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n")); | |
2819 | ||
4e7392ec MP |
2820 | mempool_destroy(sd_cdb_pool); |
2821 | kmem_cache_destroy(sd_cdb_cache); | |
2822 | ||
1da177e4 | 2823 | scsi_unregister_driver(&sd_template.gendrv); |
5e4009ba JG |
2824 | class_unregister(&sd_disk_class); |
2825 | ||
1da177e4 LT |
2826 | for (i = 0; i < SD_MAJORS; i++) |
2827 | unregister_blkdev(sd_major(i), "sd"); | |
2828 | } | |
2829 | ||
1da177e4 LT |
2830 | module_init(init_sd); |
2831 | module_exit(exit_sd); | |
e73aec82 MP |
2832 | |
2833 | static void sd_print_sense_hdr(struct scsi_disk *sdkp, | |
2834 | struct scsi_sense_hdr *sshdr) | |
2835 | { | |
2e4c3329 | 2836 | sd_printk(KERN_INFO, sdkp, " "); |
e73aec82 | 2837 | scsi_show_sense_hdr(sshdr); |
2e4c3329 | 2838 | sd_printk(KERN_INFO, sdkp, " "); |
e73aec82 MP |
2839 | scsi_show_extd_sense(sshdr->asc, sshdr->ascq); |
2840 | } | |
2841 | ||
2842 | static void sd_print_result(struct scsi_disk *sdkp, int result) | |
2843 | { | |
2e4c3329 | 2844 | sd_printk(KERN_INFO, sdkp, " "); |
e73aec82 MP |
2845 | scsi_show_result(result); |
2846 | } | |
2847 |