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1da177e4 LT |
1 | /* |
2 | * sd.c Copyright (C) 1992 Drew Eckhardt | |
3 | * Copyright (C) 1993, 1994, 1995, 1999 Eric Youngdale | |
4 | * | |
5 | * Linux scsi disk driver | |
6 | * Initial versions: Drew Eckhardt | |
7 | * Subsequent revisions: Eric Youngdale | |
8 | * Modification history: | |
9 | * - Drew Eckhardt <drew@colorado.edu> original | |
10 | * - Eric Youngdale <eric@andante.org> add scatter-gather, multiple | |
11 | * outstanding request, and other enhancements. | |
12 | * Support loadable low-level scsi drivers. | |
13 | * - Jirka Hanika <geo@ff.cuni.cz> support more scsi disks using | |
14 | * eight major numbers. | |
15 | * - Richard Gooch <rgooch@atnf.csiro.au> support devfs. | |
16 | * - Torben Mathiasen <tmm@image.dk> Resource allocation fixes in | |
17 | * sd_init and cleanups. | |
18 | * - Alex Davis <letmein@erols.com> Fix problem where partition info | |
19 | * not being read in sd_open. Fix problem where removable media | |
20 | * could be ejected after sd_open. | |
21 | * - Douglas Gilbert <dgilbert@interlog.com> cleanup for lk 2.5.x | |
22 | * - Badari Pulavarty <pbadari@us.ibm.com>, Matthew Wilcox | |
23 | * <willy@debian.org>, Kurt Garloff <garloff@suse.de>: | |
24 | * Support 32k/1M disks. | |
25 | * | |
26 | * Logging policy (needs CONFIG_SCSI_LOGGING defined): | |
27 | * - setting up transfer: SCSI_LOG_HLQUEUE levels 1 and 2 | |
28 | * - end of transfer (bh + scsi_lib): SCSI_LOG_HLCOMPLETE level 1 | |
29 | * - entering sd_ioctl: SCSI_LOG_IOCTL level 1 | |
30 | * - entering other commands: SCSI_LOG_HLQUEUE level 3 | |
31 | * Note: when the logging level is set by the user, it must be greater | |
32 | * than the level indicated above to trigger output. | |
33 | */ | |
34 | ||
1da177e4 LT |
35 | #include <linux/module.h> |
36 | #include <linux/fs.h> | |
37 | #include <linux/kernel.h> | |
1da177e4 LT |
38 | #include <linux/mm.h> |
39 | #include <linux/bio.h> | |
40 | #include <linux/genhd.h> | |
41 | #include <linux/hdreg.h> | |
42 | #include <linux/errno.h> | |
43 | #include <linux/idr.h> | |
44 | #include <linux/interrupt.h> | |
45 | #include <linux/init.h> | |
46 | #include <linux/blkdev.h> | |
47 | #include <linux/blkpg.h> | |
1da177e4 | 48 | #include <linux/delay.h> |
0b950672 | 49 | #include <linux/mutex.h> |
7404ad3b | 50 | #include <linux/string_helpers.h> |
4ace92fc | 51 | #include <linux/async.h> |
5a0e3ad6 | 52 | #include <linux/slab.h> |
54f57588 | 53 | #include <linux/pm_runtime.h> |
1da177e4 | 54 | #include <asm/uaccess.h> |
8f76d151 | 55 | #include <asm/unaligned.h> |
1da177e4 LT |
56 | |
57 | #include <scsi/scsi.h> | |
58 | #include <scsi/scsi_cmnd.h> | |
59 | #include <scsi/scsi_dbg.h> | |
60 | #include <scsi/scsi_device.h> | |
61 | #include <scsi/scsi_driver.h> | |
62 | #include <scsi/scsi_eh.h> | |
63 | #include <scsi/scsi_host.h> | |
64 | #include <scsi/scsi_ioctl.h> | |
1da177e4 LT |
65 | #include <scsi/scsicam.h> |
66 | ||
aa91696e | 67 | #include "sd.h" |
1da177e4 LT |
68 | #include "scsi_logging.h" |
69 | ||
f018fa55 RH |
70 | MODULE_AUTHOR("Eric Youngdale"); |
71 | MODULE_DESCRIPTION("SCSI disk (sd) driver"); | |
72 | MODULE_LICENSE("GPL"); | |
73 | ||
74 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK0_MAJOR); | |
75 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK1_MAJOR); | |
76 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK2_MAJOR); | |
77 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK3_MAJOR); | |
78 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK4_MAJOR); | |
79 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK5_MAJOR); | |
80 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK6_MAJOR); | |
81 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK7_MAJOR); | |
82 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK8_MAJOR); | |
83 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK9_MAJOR); | |
84 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK10_MAJOR); | |
85 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK11_MAJOR); | |
86 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK12_MAJOR); | |
87 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK13_MAJOR); | |
88 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK14_MAJOR); | |
89 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK15_MAJOR); | |
d7b8bcb0 MT |
90 | MODULE_ALIAS_SCSI_DEVICE(TYPE_DISK); |
91 | MODULE_ALIAS_SCSI_DEVICE(TYPE_MOD); | |
92 | MODULE_ALIAS_SCSI_DEVICE(TYPE_RBC); | |
f018fa55 | 93 | |
870d6656 | 94 | #if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT) |
f615b48c | 95 | #define SD_MINORS 16 |
870d6656 | 96 | #else |
3e1a7ff8 | 97 | #define SD_MINORS 0 |
870d6656 TH |
98 | #endif |
99 | ||
c98a0eb0 | 100 | static void sd_config_discard(struct scsi_disk *, unsigned int); |
7b3d9545 | 101 | static int sd_revalidate_disk(struct gendisk *); |
72ec24bd | 102 | static void sd_unlock_native_capacity(struct gendisk *disk); |
7b3d9545 LT |
103 | static int sd_probe(struct device *); |
104 | static int sd_remove(struct device *); | |
105 | static void sd_shutdown(struct device *); | |
106 | static int sd_suspend(struct device *, pm_message_t state); | |
107 | static int sd_resume(struct device *); | |
108 | static void sd_rescan(struct device *); | |
109 | static int sd_done(struct scsi_cmnd *); | |
110 | static void sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer); | |
ee959b00 | 111 | static void scsi_disk_release(struct device *cdev); |
7b3d9545 LT |
112 | static void sd_print_sense_hdr(struct scsi_disk *, struct scsi_sense_hdr *); |
113 | static void sd_print_result(struct scsi_disk *, int); | |
114 | ||
4034cc68 | 115 | static DEFINE_SPINLOCK(sd_index_lock); |
f27bac27 | 116 | static DEFINE_IDA(sd_index_ida); |
1da177e4 LT |
117 | |
118 | /* This semaphore is used to mediate the 0->1 reference get in the | |
119 | * face of object destruction (i.e. we can't allow a get on an | |
120 | * object after last put) */ | |
0b950672 | 121 | static DEFINE_MUTEX(sd_ref_mutex); |
1da177e4 | 122 | |
439d77f7 HS |
123 | static struct kmem_cache *sd_cdb_cache; |
124 | static mempool_t *sd_cdb_pool; | |
4e7392ec | 125 | |
6bdaa1f1 JB |
126 | static const char *sd_cache_types[] = { |
127 | "write through", "none", "write back", | |
128 | "write back, no read (daft)" | |
129 | }; | |
130 | ||
ee959b00 TJ |
131 | static ssize_t |
132 | sd_store_cache_type(struct device *dev, struct device_attribute *attr, | |
133 | const char *buf, size_t count) | |
6bdaa1f1 JB |
134 | { |
135 | int i, ct = -1, rcd, wce, sp; | |
ee959b00 | 136 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
137 | struct scsi_device *sdp = sdkp->device; |
138 | char buffer[64]; | |
139 | char *buffer_data; | |
140 | struct scsi_mode_data data; | |
141 | struct scsi_sense_hdr sshdr; | |
142 | int len; | |
143 | ||
144 | if (sdp->type != TYPE_DISK) | |
145 | /* no cache control on RBC devices; theoretically they | |
146 | * can do it, but there's probably so many exceptions | |
147 | * it's not worth the risk */ | |
148 | return -EINVAL; | |
149 | ||
6391a113 | 150 | for (i = 0; i < ARRAY_SIZE(sd_cache_types); i++) { |
439d77f7 | 151 | len = strlen(sd_cache_types[i]); |
6bdaa1f1 JB |
152 | if (strncmp(sd_cache_types[i], buf, len) == 0 && |
153 | buf[len] == '\n') { | |
154 | ct = i; | |
155 | break; | |
156 | } | |
157 | } | |
158 | if (ct < 0) | |
159 | return -EINVAL; | |
160 | rcd = ct & 0x01 ? 1 : 0; | |
161 | wce = ct & 0x02 ? 1 : 0; | |
162 | if (scsi_mode_sense(sdp, 0x08, 8, buffer, sizeof(buffer), SD_TIMEOUT, | |
163 | SD_MAX_RETRIES, &data, NULL)) | |
164 | return -EINVAL; | |
a9312fb8 | 165 | len = min_t(size_t, sizeof(buffer), data.length - data.header_length - |
6bdaa1f1 JB |
166 | data.block_descriptor_length); |
167 | buffer_data = buffer + data.header_length + | |
168 | data.block_descriptor_length; | |
169 | buffer_data[2] &= ~0x05; | |
170 | buffer_data[2] |= wce << 2 | rcd; | |
171 | sp = buffer_data[0] & 0x80 ? 1 : 0; | |
172 | ||
173 | if (scsi_mode_select(sdp, 1, sp, 8, buffer_data, len, SD_TIMEOUT, | |
174 | SD_MAX_RETRIES, &data, &sshdr)) { | |
175 | if (scsi_sense_valid(&sshdr)) | |
e73aec82 | 176 | sd_print_sense_hdr(sdkp, &sshdr); |
6bdaa1f1 JB |
177 | return -EINVAL; |
178 | } | |
f98a8cae | 179 | revalidate_disk(sdkp->disk); |
6bdaa1f1 JB |
180 | return count; |
181 | } | |
182 | ||
ee959b00 TJ |
183 | static ssize_t |
184 | sd_store_manage_start_stop(struct device *dev, struct device_attribute *attr, | |
185 | const char *buf, size_t count) | |
c3c94c5a | 186 | { |
ee959b00 | 187 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
c3c94c5a TH |
188 | struct scsi_device *sdp = sdkp->device; |
189 | ||
190 | if (!capable(CAP_SYS_ADMIN)) | |
191 | return -EACCES; | |
192 | ||
193 | sdp->manage_start_stop = simple_strtoul(buf, NULL, 10); | |
194 | ||
195 | return count; | |
196 | } | |
197 | ||
ee959b00 TJ |
198 | static ssize_t |
199 | sd_store_allow_restart(struct device *dev, struct device_attribute *attr, | |
200 | const char *buf, size_t count) | |
a144c5ae | 201 | { |
ee959b00 | 202 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
a144c5ae BK |
203 | struct scsi_device *sdp = sdkp->device; |
204 | ||
205 | if (!capable(CAP_SYS_ADMIN)) | |
206 | return -EACCES; | |
207 | ||
208 | if (sdp->type != TYPE_DISK) | |
209 | return -EINVAL; | |
210 | ||
211 | sdp->allow_restart = simple_strtoul(buf, NULL, 10); | |
212 | ||
213 | return count; | |
214 | } | |
215 | ||
ee959b00 TJ |
216 | static ssize_t |
217 | sd_show_cache_type(struct device *dev, struct device_attribute *attr, | |
218 | char *buf) | |
6bdaa1f1 | 219 | { |
ee959b00 | 220 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
221 | int ct = sdkp->RCD + 2*sdkp->WCE; |
222 | ||
223 | return snprintf(buf, 40, "%s\n", sd_cache_types[ct]); | |
224 | } | |
225 | ||
ee959b00 TJ |
226 | static ssize_t |
227 | sd_show_fua(struct device *dev, struct device_attribute *attr, char *buf) | |
6bdaa1f1 | 228 | { |
ee959b00 | 229 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
230 | |
231 | return snprintf(buf, 20, "%u\n", sdkp->DPOFUA); | |
232 | } | |
233 | ||
ee959b00 TJ |
234 | static ssize_t |
235 | sd_show_manage_start_stop(struct device *dev, struct device_attribute *attr, | |
236 | char *buf) | |
c3c94c5a | 237 | { |
ee959b00 | 238 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
c3c94c5a TH |
239 | struct scsi_device *sdp = sdkp->device; |
240 | ||
241 | return snprintf(buf, 20, "%u\n", sdp->manage_start_stop); | |
242 | } | |
243 | ||
ee959b00 TJ |
244 | static ssize_t |
245 | sd_show_allow_restart(struct device *dev, struct device_attribute *attr, | |
246 | char *buf) | |
a144c5ae | 247 | { |
ee959b00 | 248 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
a144c5ae BK |
249 | |
250 | return snprintf(buf, 40, "%d\n", sdkp->device->allow_restart); | |
251 | } | |
252 | ||
e0597d70 MP |
253 | static ssize_t |
254 | sd_show_protection_type(struct device *dev, struct device_attribute *attr, | |
255 | char *buf) | |
256 | { | |
257 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
258 | ||
259 | return snprintf(buf, 20, "%u\n", sdkp->protection_type); | |
260 | } | |
261 | ||
518fa8e3 MP |
262 | static ssize_t |
263 | sd_show_protection_mode(struct device *dev, struct device_attribute *attr, | |
264 | char *buf) | |
265 | { | |
266 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
267 | struct scsi_device *sdp = sdkp->device; | |
268 | unsigned int dif, dix; | |
269 | ||
270 | dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type); | |
271 | dix = scsi_host_dix_capable(sdp->host, sdkp->protection_type); | |
272 | ||
273 | if (!dix && scsi_host_dix_capable(sdp->host, SD_DIF_TYPE0_PROTECTION)) { | |
274 | dif = 0; | |
275 | dix = 1; | |
276 | } | |
277 | ||
278 | if (!dif && !dix) | |
279 | return snprintf(buf, 20, "none\n"); | |
280 | ||
281 | return snprintf(buf, 20, "%s%u\n", dix ? "dix" : "dif", dif); | |
282 | } | |
283 | ||
e0597d70 MP |
284 | static ssize_t |
285 | sd_show_app_tag_own(struct device *dev, struct device_attribute *attr, | |
286 | char *buf) | |
287 | { | |
288 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
289 | ||
290 | return snprintf(buf, 20, "%u\n", sdkp->ATO); | |
291 | } | |
292 | ||
e339c1a7 MP |
293 | static ssize_t |
294 | sd_show_thin_provisioning(struct device *dev, struct device_attribute *attr, | |
295 | char *buf) | |
296 | { | |
297 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
298 | ||
c98a0eb0 MP |
299 | return snprintf(buf, 20, "%u\n", sdkp->lbpme); |
300 | } | |
301 | ||
302 | static const char *lbp_mode[] = { | |
303 | [SD_LBP_FULL] = "full", | |
304 | [SD_LBP_UNMAP] = "unmap", | |
305 | [SD_LBP_WS16] = "writesame_16", | |
306 | [SD_LBP_WS10] = "writesame_10", | |
307 | [SD_LBP_ZERO] = "writesame_zero", | |
308 | [SD_LBP_DISABLE] = "disabled", | |
309 | }; | |
310 | ||
311 | static ssize_t | |
312 | sd_show_provisioning_mode(struct device *dev, struct device_attribute *attr, | |
313 | char *buf) | |
314 | { | |
315 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
316 | ||
317 | return snprintf(buf, 20, "%s\n", lbp_mode[sdkp->provisioning_mode]); | |
318 | } | |
319 | ||
320 | static ssize_t | |
321 | sd_store_provisioning_mode(struct device *dev, struct device_attribute *attr, | |
322 | const char *buf, size_t count) | |
323 | { | |
324 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
325 | struct scsi_device *sdp = sdkp->device; | |
326 | ||
327 | if (!capable(CAP_SYS_ADMIN)) | |
328 | return -EACCES; | |
329 | ||
330 | if (sdp->type != TYPE_DISK) | |
331 | return -EINVAL; | |
332 | ||
333 | if (!strncmp(buf, lbp_mode[SD_LBP_UNMAP], 20)) | |
334 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
335 | else if (!strncmp(buf, lbp_mode[SD_LBP_WS16], 20)) | |
336 | sd_config_discard(sdkp, SD_LBP_WS16); | |
337 | else if (!strncmp(buf, lbp_mode[SD_LBP_WS10], 20)) | |
338 | sd_config_discard(sdkp, SD_LBP_WS10); | |
339 | else if (!strncmp(buf, lbp_mode[SD_LBP_ZERO], 20)) | |
340 | sd_config_discard(sdkp, SD_LBP_ZERO); | |
341 | else if (!strncmp(buf, lbp_mode[SD_LBP_DISABLE], 20)) | |
342 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
343 | else | |
344 | return -EINVAL; | |
345 | ||
346 | return count; | |
e339c1a7 MP |
347 | } |
348 | ||
ee959b00 | 349 | static struct device_attribute sd_disk_attrs[] = { |
6bdaa1f1 JB |
350 | __ATTR(cache_type, S_IRUGO|S_IWUSR, sd_show_cache_type, |
351 | sd_store_cache_type), | |
352 | __ATTR(FUA, S_IRUGO, sd_show_fua, NULL), | |
a144c5ae BK |
353 | __ATTR(allow_restart, S_IRUGO|S_IWUSR, sd_show_allow_restart, |
354 | sd_store_allow_restart), | |
c3c94c5a TH |
355 | __ATTR(manage_start_stop, S_IRUGO|S_IWUSR, sd_show_manage_start_stop, |
356 | sd_store_manage_start_stop), | |
e0597d70 | 357 | __ATTR(protection_type, S_IRUGO, sd_show_protection_type, NULL), |
518fa8e3 | 358 | __ATTR(protection_mode, S_IRUGO, sd_show_protection_mode, NULL), |
e0597d70 | 359 | __ATTR(app_tag_own, S_IRUGO, sd_show_app_tag_own, NULL), |
e339c1a7 | 360 | __ATTR(thin_provisioning, S_IRUGO, sd_show_thin_provisioning, NULL), |
c98a0eb0 MP |
361 | __ATTR(provisioning_mode, S_IRUGO|S_IWUSR, sd_show_provisioning_mode, |
362 | sd_store_provisioning_mode), | |
6bdaa1f1 JB |
363 | __ATTR_NULL, |
364 | }; | |
365 | ||
366 | static struct class sd_disk_class = { | |
367 | .name = "scsi_disk", | |
368 | .owner = THIS_MODULE, | |
ee959b00 TJ |
369 | .dev_release = scsi_disk_release, |
370 | .dev_attrs = sd_disk_attrs, | |
6bdaa1f1 | 371 | }; |
1da177e4 LT |
372 | |
373 | static struct scsi_driver sd_template = { | |
374 | .owner = THIS_MODULE, | |
375 | .gendrv = { | |
376 | .name = "sd", | |
377 | .probe = sd_probe, | |
378 | .remove = sd_remove, | |
c3c94c5a TH |
379 | .suspend = sd_suspend, |
380 | .resume = sd_resume, | |
1da177e4 LT |
381 | .shutdown = sd_shutdown, |
382 | }, | |
383 | .rescan = sd_rescan, | |
7b3d9545 | 384 | .done = sd_done, |
1da177e4 LT |
385 | }; |
386 | ||
387 | /* | |
388 | * Device no to disk mapping: | |
389 | * | |
390 | * major disc2 disc p1 | |
391 | * |............|.............|....|....| <- dev_t | |
392 | * 31 20 19 8 7 4 3 0 | |
393 | * | |
394 | * Inside a major, we have 16k disks, however mapped non- | |
395 | * contiguously. The first 16 disks are for major0, the next | |
396 | * ones with major1, ... Disk 256 is for major0 again, disk 272 | |
397 | * for major1, ... | |
398 | * As we stay compatible with our numbering scheme, we can reuse | |
399 | * the well-know SCSI majors 8, 65--71, 136--143. | |
400 | */ | |
401 | static int sd_major(int major_idx) | |
402 | { | |
403 | switch (major_idx) { | |
404 | case 0: | |
405 | return SCSI_DISK0_MAJOR; | |
406 | case 1 ... 7: | |
407 | return SCSI_DISK1_MAJOR + major_idx - 1; | |
408 | case 8 ... 15: | |
409 | return SCSI_DISK8_MAJOR + major_idx - 8; | |
410 | default: | |
411 | BUG(); | |
412 | return 0; /* shut up gcc */ | |
413 | } | |
414 | } | |
415 | ||
39b7f1e2 | 416 | static struct scsi_disk *__scsi_disk_get(struct gendisk *disk) |
1da177e4 LT |
417 | { |
418 | struct scsi_disk *sdkp = NULL; | |
419 | ||
39b7f1e2 AS |
420 | if (disk->private_data) { |
421 | sdkp = scsi_disk(disk); | |
422 | if (scsi_device_get(sdkp->device) == 0) | |
ee959b00 | 423 | get_device(&sdkp->dev); |
39b7f1e2 AS |
424 | else |
425 | sdkp = NULL; | |
426 | } | |
427 | return sdkp; | |
428 | } | |
429 | ||
430 | static struct scsi_disk *scsi_disk_get(struct gendisk *disk) | |
431 | { | |
432 | struct scsi_disk *sdkp; | |
433 | ||
0b950672 | 434 | mutex_lock(&sd_ref_mutex); |
39b7f1e2 | 435 | sdkp = __scsi_disk_get(disk); |
0b950672 | 436 | mutex_unlock(&sd_ref_mutex); |
1da177e4 | 437 | return sdkp; |
39b7f1e2 | 438 | } |
1da177e4 | 439 | |
39b7f1e2 AS |
440 | static struct scsi_disk *scsi_disk_get_from_dev(struct device *dev) |
441 | { | |
442 | struct scsi_disk *sdkp; | |
443 | ||
0b950672 | 444 | mutex_lock(&sd_ref_mutex); |
39b7f1e2 AS |
445 | sdkp = dev_get_drvdata(dev); |
446 | if (sdkp) | |
447 | sdkp = __scsi_disk_get(sdkp->disk); | |
0b950672 | 448 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
449 | return sdkp; |
450 | } | |
451 | ||
452 | static void scsi_disk_put(struct scsi_disk *sdkp) | |
453 | { | |
454 | struct scsi_device *sdev = sdkp->device; | |
455 | ||
0b950672 | 456 | mutex_lock(&sd_ref_mutex); |
ee959b00 | 457 | put_device(&sdkp->dev); |
1da177e4 | 458 | scsi_device_put(sdev); |
0b950672 | 459 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
460 | } |
461 | ||
35e1a5d9 MP |
462 | static void sd_prot_op(struct scsi_cmnd *scmd, unsigned int dif) |
463 | { | |
464 | unsigned int prot_op = SCSI_PROT_NORMAL; | |
465 | unsigned int dix = scsi_prot_sg_count(scmd); | |
466 | ||
467 | if (scmd->sc_data_direction == DMA_FROM_DEVICE) { | |
468 | if (dif && dix) | |
469 | prot_op = SCSI_PROT_READ_PASS; | |
470 | else if (dif && !dix) | |
471 | prot_op = SCSI_PROT_READ_STRIP; | |
472 | else if (!dif && dix) | |
473 | prot_op = SCSI_PROT_READ_INSERT; | |
474 | } else { | |
475 | if (dif && dix) | |
476 | prot_op = SCSI_PROT_WRITE_PASS; | |
477 | else if (dif && !dix) | |
478 | prot_op = SCSI_PROT_WRITE_INSERT; | |
479 | else if (!dif && dix) | |
480 | prot_op = SCSI_PROT_WRITE_STRIP; | |
481 | } | |
482 | ||
483 | scsi_set_prot_op(scmd, prot_op); | |
484 | scsi_set_prot_type(scmd, dif); | |
485 | } | |
486 | ||
c98a0eb0 MP |
487 | static void sd_config_discard(struct scsi_disk *sdkp, unsigned int mode) |
488 | { | |
489 | struct request_queue *q = sdkp->disk->queue; | |
490 | unsigned int logical_block_size = sdkp->device->sector_size; | |
491 | unsigned int max_blocks = 0; | |
492 | ||
493 | q->limits.discard_zeroes_data = sdkp->lbprz; | |
2a8cfad0 MP |
494 | q->limits.discard_alignment = sdkp->unmap_alignment * |
495 | logical_block_size; | |
c98a0eb0 MP |
496 | q->limits.discard_granularity = |
497 | max(sdkp->physical_block_size, | |
498 | sdkp->unmap_granularity * logical_block_size); | |
499 | ||
500 | switch (mode) { | |
501 | ||
502 | case SD_LBP_DISABLE: | |
503 | q->limits.max_discard_sectors = 0; | |
504 | queue_flag_clear_unlocked(QUEUE_FLAG_DISCARD, q); | |
505 | return; | |
506 | ||
507 | case SD_LBP_UNMAP: | |
508 | max_blocks = min_not_zero(sdkp->max_unmap_blocks, 0xffffffff); | |
509 | break; | |
510 | ||
511 | case SD_LBP_WS16: | |
512 | max_blocks = min_not_zero(sdkp->max_ws_blocks, 0xffffffff); | |
513 | break; | |
514 | ||
515 | case SD_LBP_WS10: | |
516 | max_blocks = min_not_zero(sdkp->max_ws_blocks, (u32)0xffff); | |
517 | break; | |
518 | ||
519 | case SD_LBP_ZERO: | |
520 | max_blocks = min_not_zero(sdkp->max_ws_blocks, (u32)0xffff); | |
521 | q->limits.discard_zeroes_data = 1; | |
522 | break; | |
523 | } | |
524 | ||
525 | q->limits.max_discard_sectors = max_blocks * (logical_block_size >> 9); | |
526 | queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, q); | |
527 | ||
528 | sdkp->provisioning_mode = mode; | |
529 | } | |
530 | ||
e339c1a7 | 531 | /** |
66ac0280 CH |
532 | * scsi_setup_discard_cmnd - unmap blocks on thinly provisioned device |
533 | * @sdp: scsi device to operate one | |
e339c1a7 MP |
534 | * @rq: Request to prepare |
535 | * | |
536 | * Will issue either UNMAP or WRITE SAME(16) depending on preference | |
537 | * indicated by target device. | |
538 | **/ | |
66ac0280 | 539 | static int scsi_setup_discard_cmnd(struct scsi_device *sdp, struct request *rq) |
e339c1a7 MP |
540 | { |
541 | struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); | |
542 | struct bio *bio = rq->bio; | |
543 | sector_t sector = bio->bi_sector; | |
66ac0280 CH |
544 | unsigned int nr_sectors = bio_sectors(bio); |
545 | unsigned int len; | |
f1126e95 | 546 | int ret; |
c98a0eb0 | 547 | char *buf; |
66ac0280 | 548 | struct page *page; |
e339c1a7 MP |
549 | |
550 | if (sdkp->device->sector_size == 4096) { | |
551 | sector >>= 3; | |
66ac0280 | 552 | nr_sectors >>= 3; |
e339c1a7 MP |
553 | } |
554 | ||
e339c1a7 MP |
555 | rq->timeout = SD_TIMEOUT; |
556 | ||
557 | memset(rq->cmd, 0, rq->cmd_len); | |
558 | ||
66ac0280 CH |
559 | page = alloc_page(GFP_ATOMIC | __GFP_ZERO); |
560 | if (!page) | |
561 | return BLKPREP_DEFER; | |
562 | ||
c98a0eb0 MP |
563 | switch (sdkp->provisioning_mode) { |
564 | case SD_LBP_UNMAP: | |
565 | buf = page_address(page); | |
e339c1a7 | 566 | |
66ac0280 | 567 | rq->cmd_len = 10; |
e339c1a7 MP |
568 | rq->cmd[0] = UNMAP; |
569 | rq->cmd[8] = 24; | |
e339c1a7 MP |
570 | |
571 | put_unaligned_be16(6 + 16, &buf[0]); | |
572 | put_unaligned_be16(16, &buf[2]); | |
573 | put_unaligned_be64(sector, &buf[8]); | |
66ac0280 | 574 | put_unaligned_be32(nr_sectors, &buf[16]); |
e339c1a7 | 575 | |
66ac0280 | 576 | len = 24; |
c98a0eb0 MP |
577 | break; |
578 | ||
579 | case SD_LBP_WS16: | |
66ac0280 | 580 | rq->cmd_len = 16; |
e339c1a7 MP |
581 | rq->cmd[0] = WRITE_SAME_16; |
582 | rq->cmd[1] = 0x8; /* UNMAP */ | |
583 | put_unaligned_be64(sector, &rq->cmd[2]); | |
66ac0280 CH |
584 | put_unaligned_be32(nr_sectors, &rq->cmd[10]); |
585 | ||
586 | len = sdkp->device->sector_size; | |
c98a0eb0 MP |
587 | break; |
588 | ||
589 | case SD_LBP_WS10: | |
590 | case SD_LBP_ZERO: | |
591 | rq->cmd_len = 10; | |
592 | rq->cmd[0] = WRITE_SAME; | |
593 | if (sdkp->provisioning_mode == SD_LBP_WS10) | |
594 | rq->cmd[1] = 0x8; /* UNMAP */ | |
595 | put_unaligned_be32(sector, &rq->cmd[2]); | |
596 | put_unaligned_be16(nr_sectors, &rq->cmd[7]); | |
597 | ||
598 | len = sdkp->device->sector_size; | |
599 | break; | |
600 | ||
601 | default: | |
09b9cc44 | 602 | ret = BLKPREP_KILL; |
c98a0eb0 | 603 | goto out; |
e339c1a7 MP |
604 | } |
605 | ||
66ac0280 | 606 | blk_add_request_payload(rq, page, len); |
f1126e95 FT |
607 | ret = scsi_setup_blk_pc_cmnd(sdp, rq); |
608 | rq->buffer = page_address(page); | |
c98a0eb0 MP |
609 | |
610 | out: | |
610a6349 FT |
611 | if (ret != BLKPREP_OK) { |
612 | __free_page(page); | |
613 | rq->buffer = NULL; | |
614 | } | |
f1126e95 FT |
615 | return ret; |
616 | } | |
617 | ||
90467c29 FT |
618 | static int scsi_setup_flush_cmnd(struct scsi_device *sdp, struct request *rq) |
619 | { | |
e3b3e624 | 620 | rq->timeout = SD_FLUSH_TIMEOUT; |
90467c29 FT |
621 | rq->retries = SD_MAX_RETRIES; |
622 | rq->cmd[0] = SYNCHRONIZE_CACHE; | |
623 | rq->cmd_len = 10; | |
624 | ||
625 | return scsi_setup_blk_pc_cmnd(sdp, rq); | |
626 | } | |
627 | ||
f1126e95 FT |
628 | static void sd_unprep_fn(struct request_queue *q, struct request *rq) |
629 | { | |
610a6349 FT |
630 | if (rq->cmd_flags & REQ_DISCARD) { |
631 | free_page((unsigned long)rq->buffer); | |
632 | rq->buffer = NULL; | |
633 | } | |
e339c1a7 MP |
634 | } |
635 | ||
1da177e4 LT |
636 | /** |
637 | * sd_init_command - build a scsi (read or write) command from | |
638 | * information in the request structure. | |
639 | * @SCpnt: pointer to mid-level's per scsi command structure that | |
640 | * contains request and into which the scsi command is written | |
641 | * | |
642 | * Returns 1 if successful and 0 if error (or cannot be done now). | |
643 | **/ | |
7f9a6bc4 | 644 | static int sd_prep_fn(struct request_queue *q, struct request *rq) |
1da177e4 | 645 | { |
7f9a6bc4 JB |
646 | struct scsi_cmnd *SCpnt; |
647 | struct scsi_device *sdp = q->queuedata; | |
776b23a0 | 648 | struct gendisk *disk = rq->rq_disk; |
af55ff67 | 649 | struct scsi_disk *sdkp; |
83096ebf | 650 | sector_t block = blk_rq_pos(rq); |
18351070 | 651 | sector_t threshold; |
83096ebf | 652 | unsigned int this_count = blk_rq_sectors(rq); |
bd623e79 | 653 | int ret, host_dif; |
4e7392ec | 654 | unsigned char protect; |
7f9a6bc4 | 655 | |
e339c1a7 MP |
656 | /* |
657 | * Discard request come in as REQ_TYPE_FS but we turn them into | |
658 | * block PC requests to make life easier. | |
659 | */ | |
66ac0280 CH |
660 | if (rq->cmd_flags & REQ_DISCARD) { |
661 | ret = scsi_setup_discard_cmnd(sdp, rq); | |
662 | goto out; | |
90467c29 FT |
663 | } else if (rq->cmd_flags & REQ_FLUSH) { |
664 | ret = scsi_setup_flush_cmnd(sdp, rq); | |
665 | goto out; | |
66ac0280 | 666 | } else if (rq->cmd_type == REQ_TYPE_BLOCK_PC) { |
7f9a6bc4 JB |
667 | ret = scsi_setup_blk_pc_cmnd(sdp, rq); |
668 | goto out; | |
669 | } else if (rq->cmd_type != REQ_TYPE_FS) { | |
670 | ret = BLKPREP_KILL; | |
671 | goto out; | |
672 | } | |
673 | ret = scsi_setup_fs_cmnd(sdp, rq); | |
674 | if (ret != BLKPREP_OK) | |
675 | goto out; | |
676 | SCpnt = rq->special; | |
af55ff67 | 677 | sdkp = scsi_disk(disk); |
7f9a6bc4 JB |
678 | |
679 | /* from here on until we're complete, any goto out | |
680 | * is used for a killable error condition */ | |
681 | ret = BLKPREP_KILL; | |
1da177e4 | 682 | |
fa0d34be MP |
683 | SCSI_LOG_HLQUEUE(1, scmd_printk(KERN_INFO, SCpnt, |
684 | "sd_init_command: block=%llu, " | |
685 | "count=%d\n", | |
686 | (unsigned long long)block, | |
687 | this_count)); | |
1da177e4 LT |
688 | |
689 | if (!sdp || !scsi_device_online(sdp) || | |
83096ebf | 690 | block + blk_rq_sectors(rq) > get_capacity(disk)) { |
fa0d34be | 691 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
83096ebf TH |
692 | "Finishing %u sectors\n", |
693 | blk_rq_sectors(rq))); | |
fa0d34be MP |
694 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
695 | "Retry with 0x%p\n", SCpnt)); | |
7f9a6bc4 | 696 | goto out; |
1da177e4 LT |
697 | } |
698 | ||
699 | if (sdp->changed) { | |
700 | /* | |
701 | * quietly refuse to do anything to a changed disc until | |
702 | * the changed bit has been reset | |
703 | */ | |
3ff5588d | 704 | /* printk("SCSI disk has been changed or is not present. Prohibiting further I/O.\n"); */ |
7f9a6bc4 | 705 | goto out; |
1da177e4 | 706 | } |
7f9a6bc4 | 707 | |
a0899d4d | 708 | /* |
18351070 LT |
709 | * Some SD card readers can't handle multi-sector accesses which touch |
710 | * the last one or two hardware sectors. Split accesses as needed. | |
a0899d4d | 711 | */ |
18351070 LT |
712 | threshold = get_capacity(disk) - SD_LAST_BUGGY_SECTORS * |
713 | (sdp->sector_size / 512); | |
714 | ||
715 | if (unlikely(sdp->last_sector_bug && block + this_count > threshold)) { | |
716 | if (block < threshold) { | |
717 | /* Access up to the threshold but not beyond */ | |
718 | this_count = threshold - block; | |
719 | } else { | |
720 | /* Access only a single hardware sector */ | |
721 | this_count = sdp->sector_size / 512; | |
722 | } | |
723 | } | |
a0899d4d | 724 | |
fa0d34be MP |
725 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, "block=%llu\n", |
726 | (unsigned long long)block)); | |
1da177e4 LT |
727 | |
728 | /* | |
729 | * If we have a 1K hardware sectorsize, prevent access to single | |
730 | * 512 byte sectors. In theory we could handle this - in fact | |
731 | * the scsi cdrom driver must be able to handle this because | |
732 | * we typically use 1K blocksizes, and cdroms typically have | |
733 | * 2K hardware sectorsizes. Of course, things are simpler | |
734 | * with the cdrom, since it is read-only. For performance | |
735 | * reasons, the filesystems should be able to handle this | |
736 | * and not force the scsi disk driver to use bounce buffers | |
737 | * for this. | |
738 | */ | |
739 | if (sdp->sector_size == 1024) { | |
83096ebf | 740 | if ((block & 1) || (blk_rq_sectors(rq) & 1)) { |
e73aec82 MP |
741 | scmd_printk(KERN_ERR, SCpnt, |
742 | "Bad block number requested\n"); | |
7f9a6bc4 | 743 | goto out; |
1da177e4 LT |
744 | } else { |
745 | block = block >> 1; | |
746 | this_count = this_count >> 1; | |
747 | } | |
748 | } | |
749 | if (sdp->sector_size == 2048) { | |
83096ebf | 750 | if ((block & 3) || (blk_rq_sectors(rq) & 3)) { |
e73aec82 MP |
751 | scmd_printk(KERN_ERR, SCpnt, |
752 | "Bad block number requested\n"); | |
7f9a6bc4 | 753 | goto out; |
1da177e4 LT |
754 | } else { |
755 | block = block >> 2; | |
756 | this_count = this_count >> 2; | |
757 | } | |
758 | } | |
759 | if (sdp->sector_size == 4096) { | |
83096ebf | 760 | if ((block & 7) || (blk_rq_sectors(rq) & 7)) { |
e73aec82 MP |
761 | scmd_printk(KERN_ERR, SCpnt, |
762 | "Bad block number requested\n"); | |
7f9a6bc4 | 763 | goto out; |
1da177e4 LT |
764 | } else { |
765 | block = block >> 3; | |
766 | this_count = this_count >> 3; | |
767 | } | |
768 | } | |
769 | if (rq_data_dir(rq) == WRITE) { | |
770 | if (!sdp->writeable) { | |
7f9a6bc4 | 771 | goto out; |
1da177e4 LT |
772 | } |
773 | SCpnt->cmnd[0] = WRITE_6; | |
774 | SCpnt->sc_data_direction = DMA_TO_DEVICE; | |
af55ff67 MP |
775 | |
776 | if (blk_integrity_rq(rq) && | |
777 | sd_dif_prepare(rq, block, sdp->sector_size) == -EIO) | |
778 | goto out; | |
779 | ||
1da177e4 LT |
780 | } else if (rq_data_dir(rq) == READ) { |
781 | SCpnt->cmnd[0] = READ_6; | |
782 | SCpnt->sc_data_direction = DMA_FROM_DEVICE; | |
783 | } else { | |
e73aec82 | 784 | scmd_printk(KERN_ERR, SCpnt, "Unknown command %x\n", rq->cmd_flags); |
7f9a6bc4 | 785 | goto out; |
1da177e4 LT |
786 | } |
787 | ||
fa0d34be | 788 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
83096ebf | 789 | "%s %d/%u 512 byte blocks.\n", |
fa0d34be MP |
790 | (rq_data_dir(rq) == WRITE) ? |
791 | "writing" : "reading", this_count, | |
83096ebf | 792 | blk_rq_sectors(rq))); |
1da177e4 | 793 | |
af55ff67 | 794 | /* Set RDPROTECT/WRPROTECT if disk is formatted with DIF */ |
bd623e79 MP |
795 | host_dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type); |
796 | if (host_dif) | |
4e7392ec | 797 | protect = 1 << 5; |
af55ff67 | 798 | else |
4e7392ec MP |
799 | protect = 0; |
800 | ||
801 | if (host_dif == SD_DIF_TYPE2_PROTECTION) { | |
802 | SCpnt->cmnd = mempool_alloc(sd_cdb_pool, GFP_ATOMIC); | |
803 | ||
804 | if (unlikely(SCpnt->cmnd == NULL)) { | |
805 | ret = BLKPREP_DEFER; | |
806 | goto out; | |
807 | } | |
af55ff67 | 808 | |
4e7392ec MP |
809 | SCpnt->cmd_len = SD_EXT_CDB_SIZE; |
810 | memset(SCpnt->cmnd, 0, SCpnt->cmd_len); | |
811 | SCpnt->cmnd[0] = VARIABLE_LENGTH_CMD; | |
812 | SCpnt->cmnd[7] = 0x18; | |
813 | SCpnt->cmnd[9] = (rq_data_dir(rq) == READ) ? READ_32 : WRITE_32; | |
33659ebb | 814 | SCpnt->cmnd[10] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
4e7392ec MP |
815 | |
816 | /* LBA */ | |
817 | SCpnt->cmnd[12] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0; | |
818 | SCpnt->cmnd[13] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0; | |
819 | SCpnt->cmnd[14] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0; | |
820 | SCpnt->cmnd[15] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0; | |
821 | SCpnt->cmnd[16] = (unsigned char) (block >> 24) & 0xff; | |
822 | SCpnt->cmnd[17] = (unsigned char) (block >> 16) & 0xff; | |
823 | SCpnt->cmnd[18] = (unsigned char) (block >> 8) & 0xff; | |
824 | SCpnt->cmnd[19] = (unsigned char) block & 0xff; | |
825 | ||
826 | /* Expected Indirect LBA */ | |
827 | SCpnt->cmnd[20] = (unsigned char) (block >> 24) & 0xff; | |
828 | SCpnt->cmnd[21] = (unsigned char) (block >> 16) & 0xff; | |
829 | SCpnt->cmnd[22] = (unsigned char) (block >> 8) & 0xff; | |
830 | SCpnt->cmnd[23] = (unsigned char) block & 0xff; | |
831 | ||
832 | /* Transfer length */ | |
833 | SCpnt->cmnd[28] = (unsigned char) (this_count >> 24) & 0xff; | |
834 | SCpnt->cmnd[29] = (unsigned char) (this_count >> 16) & 0xff; | |
835 | SCpnt->cmnd[30] = (unsigned char) (this_count >> 8) & 0xff; | |
836 | SCpnt->cmnd[31] = (unsigned char) this_count & 0xff; | |
837 | } else if (block > 0xffffffff) { | |
1da177e4 | 838 | SCpnt->cmnd[0] += READ_16 - READ_6; |
33659ebb | 839 | SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
1da177e4 LT |
840 | SCpnt->cmnd[2] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0; |
841 | SCpnt->cmnd[3] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0; | |
842 | SCpnt->cmnd[4] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0; | |
843 | SCpnt->cmnd[5] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0; | |
844 | SCpnt->cmnd[6] = (unsigned char) (block >> 24) & 0xff; | |
845 | SCpnt->cmnd[7] = (unsigned char) (block >> 16) & 0xff; | |
846 | SCpnt->cmnd[8] = (unsigned char) (block >> 8) & 0xff; | |
847 | SCpnt->cmnd[9] = (unsigned char) block & 0xff; | |
848 | SCpnt->cmnd[10] = (unsigned char) (this_count >> 24) & 0xff; | |
849 | SCpnt->cmnd[11] = (unsigned char) (this_count >> 16) & 0xff; | |
850 | SCpnt->cmnd[12] = (unsigned char) (this_count >> 8) & 0xff; | |
851 | SCpnt->cmnd[13] = (unsigned char) this_count & 0xff; | |
852 | SCpnt->cmnd[14] = SCpnt->cmnd[15] = 0; | |
853 | } else if ((this_count > 0xff) || (block > 0x1fffff) || | |
af55ff67 | 854 | scsi_device_protection(SCpnt->device) || |
1da177e4 LT |
855 | SCpnt->device->use_10_for_rw) { |
856 | if (this_count > 0xffff) | |
857 | this_count = 0xffff; | |
858 | ||
859 | SCpnt->cmnd[0] += READ_10 - READ_6; | |
33659ebb | 860 | SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
1da177e4 LT |
861 | SCpnt->cmnd[2] = (unsigned char) (block >> 24) & 0xff; |
862 | SCpnt->cmnd[3] = (unsigned char) (block >> 16) & 0xff; | |
863 | SCpnt->cmnd[4] = (unsigned char) (block >> 8) & 0xff; | |
864 | SCpnt->cmnd[5] = (unsigned char) block & 0xff; | |
865 | SCpnt->cmnd[6] = SCpnt->cmnd[9] = 0; | |
866 | SCpnt->cmnd[7] = (unsigned char) (this_count >> 8) & 0xff; | |
867 | SCpnt->cmnd[8] = (unsigned char) this_count & 0xff; | |
868 | } else { | |
33659ebb | 869 | if (unlikely(rq->cmd_flags & REQ_FUA)) { |
007365ad TH |
870 | /* |
871 | * This happens only if this drive failed | |
872 | * 10byte rw command with ILLEGAL_REQUEST | |
873 | * during operation and thus turned off | |
874 | * use_10_for_rw. | |
875 | */ | |
e73aec82 MP |
876 | scmd_printk(KERN_ERR, SCpnt, |
877 | "FUA write on READ/WRITE(6) drive\n"); | |
7f9a6bc4 | 878 | goto out; |
007365ad TH |
879 | } |
880 | ||
1da177e4 LT |
881 | SCpnt->cmnd[1] |= (unsigned char) ((block >> 16) & 0x1f); |
882 | SCpnt->cmnd[2] = (unsigned char) ((block >> 8) & 0xff); | |
883 | SCpnt->cmnd[3] = (unsigned char) block & 0xff; | |
884 | SCpnt->cmnd[4] = (unsigned char) this_count; | |
885 | SCpnt->cmnd[5] = 0; | |
886 | } | |
30b0c37b | 887 | SCpnt->sdb.length = this_count * sdp->sector_size; |
1da177e4 | 888 | |
af55ff67 | 889 | /* If DIF or DIX is enabled, tell HBA how to handle request */ |
bd623e79 | 890 | if (host_dif || scsi_prot_sg_count(SCpnt)) |
35e1a5d9 | 891 | sd_prot_op(SCpnt, host_dif); |
af55ff67 | 892 | |
1da177e4 LT |
893 | /* |
894 | * We shouldn't disconnect in the middle of a sector, so with a dumb | |
895 | * host adapter, it's safe to assume that we can at least transfer | |
896 | * this many bytes between each connect / disconnect. | |
897 | */ | |
898 | SCpnt->transfersize = sdp->sector_size; | |
899 | SCpnt->underflow = this_count << 9; | |
900 | SCpnt->allowed = SD_MAX_RETRIES; | |
1da177e4 | 901 | |
1da177e4 LT |
902 | /* |
903 | * This indicates that the command is ready from our end to be | |
904 | * queued. | |
905 | */ | |
7f9a6bc4 JB |
906 | ret = BLKPREP_OK; |
907 | out: | |
908 | return scsi_prep_return(q, rq, ret); | |
1da177e4 LT |
909 | } |
910 | ||
911 | /** | |
912 | * sd_open - open a scsi disk device | |
913 | * @inode: only i_rdev member may be used | |
914 | * @filp: only f_mode and f_flags may be used | |
915 | * | |
916 | * Returns 0 if successful. Returns a negated errno value in case | |
917 | * of error. | |
918 | * | |
919 | * Note: This can be called from a user context (e.g. fsck(1) ) | |
920 | * or from within the kernel (e.g. as a result of a mount(1) ). | |
921 | * In the latter case @inode and @filp carry an abridged amount | |
922 | * of information as noted above. | |
409f3499 AB |
923 | * |
924 | * Locking: called with bdev->bd_mutex held. | |
1da177e4 | 925 | **/ |
0338e291 | 926 | static int sd_open(struct block_device *bdev, fmode_t mode) |
1da177e4 | 927 | { |
0338e291 | 928 | struct scsi_disk *sdkp = scsi_disk_get(bdev->bd_disk); |
1da177e4 LT |
929 | struct scsi_device *sdev; |
930 | int retval; | |
931 | ||
0338e291 | 932 | if (!sdkp) |
1da177e4 LT |
933 | return -ENXIO; |
934 | ||
fa0d34be | 935 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_open\n")); |
1da177e4 LT |
936 | |
937 | sdev = sdkp->device; | |
938 | ||
478a8a05 AS |
939 | retval = scsi_autopm_get_device(sdev); |
940 | if (retval) | |
941 | goto error_autopm; | |
942 | ||
1da177e4 LT |
943 | /* |
944 | * If the device is in error recovery, wait until it is done. | |
945 | * If the device is offline, then disallow any access to it. | |
946 | */ | |
947 | retval = -ENXIO; | |
948 | if (!scsi_block_when_processing_errors(sdev)) | |
949 | goto error_out; | |
950 | ||
951 | if (sdev->removable || sdkp->write_prot) | |
0338e291 | 952 | check_disk_change(bdev); |
1da177e4 LT |
953 | |
954 | /* | |
955 | * If the drive is empty, just let the open fail. | |
956 | */ | |
957 | retval = -ENOMEDIUM; | |
0338e291 | 958 | if (sdev->removable && !sdkp->media_present && !(mode & FMODE_NDELAY)) |
1da177e4 LT |
959 | goto error_out; |
960 | ||
961 | /* | |
962 | * If the device has the write protect tab set, have the open fail | |
963 | * if the user expects to be able to write to the thing. | |
964 | */ | |
965 | retval = -EROFS; | |
0338e291 | 966 | if (sdkp->write_prot && (mode & FMODE_WRITE)) |
1da177e4 LT |
967 | goto error_out; |
968 | ||
969 | /* | |
970 | * It is possible that the disk changing stuff resulted in | |
971 | * the device being taken offline. If this is the case, | |
972 | * report this to the user, and don't pretend that the | |
973 | * open actually succeeded. | |
974 | */ | |
975 | retval = -ENXIO; | |
976 | if (!scsi_device_online(sdev)) | |
977 | goto error_out; | |
978 | ||
409f3499 | 979 | if ((atomic_inc_return(&sdkp->openers) == 1) && sdev->removable) { |
1da177e4 LT |
980 | if (scsi_block_when_processing_errors(sdev)) |
981 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT); | |
982 | } | |
983 | ||
984 | return 0; | |
985 | ||
986 | error_out: | |
478a8a05 AS |
987 | scsi_autopm_put_device(sdev); |
988 | error_autopm: | |
1da177e4 LT |
989 | scsi_disk_put(sdkp); |
990 | return retval; | |
991 | } | |
992 | ||
993 | /** | |
994 | * sd_release - invoked when the (last) close(2) is called on this | |
995 | * scsi disk. | |
996 | * @inode: only i_rdev member may be used | |
997 | * @filp: only f_mode and f_flags may be used | |
998 | * | |
999 | * Returns 0. | |
1000 | * | |
1001 | * Note: may block (uninterruptible) if error recovery is underway | |
1002 | * on this disk. | |
409f3499 AB |
1003 | * |
1004 | * Locking: called with bdev->bd_mutex held. | |
1da177e4 | 1005 | **/ |
0338e291 | 1006 | static int sd_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 1007 | { |
1da177e4 LT |
1008 | struct scsi_disk *sdkp = scsi_disk(disk); |
1009 | struct scsi_device *sdev = sdkp->device; | |
1010 | ||
56937f7b | 1011 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_release\n")); |
1da177e4 | 1012 | |
7e443312 | 1013 | if (atomic_dec_return(&sdkp->openers) == 0 && sdev->removable) { |
1da177e4 LT |
1014 | if (scsi_block_when_processing_errors(sdev)) |
1015 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW); | |
1016 | } | |
1017 | ||
1018 | /* | |
1019 | * XXX and what if there are packets in flight and this close() | |
1020 | * XXX is followed by a "rmmod sd_mod"? | |
1021 | */ | |
478a8a05 AS |
1022 | |
1023 | scsi_autopm_put_device(sdev); | |
1da177e4 LT |
1024 | scsi_disk_put(sdkp); |
1025 | return 0; | |
1026 | } | |
1027 | ||
a885c8c4 | 1028 | static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
1da177e4 LT |
1029 | { |
1030 | struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk); | |
1031 | struct scsi_device *sdp = sdkp->device; | |
1032 | struct Scsi_Host *host = sdp->host; | |
1033 | int diskinfo[4]; | |
1034 | ||
1035 | /* default to most commonly used values */ | |
1036 | diskinfo[0] = 0x40; /* 1 << 6 */ | |
1037 | diskinfo[1] = 0x20; /* 1 << 5 */ | |
1038 | diskinfo[2] = sdkp->capacity >> 11; | |
1039 | ||
1040 | /* override with calculated, extended default, or driver values */ | |
1041 | if (host->hostt->bios_param) | |
1042 | host->hostt->bios_param(sdp, bdev, sdkp->capacity, diskinfo); | |
1043 | else | |
1044 | scsicam_bios_param(bdev, sdkp->capacity, diskinfo); | |
1045 | ||
a885c8c4 CH |
1046 | geo->heads = diskinfo[0]; |
1047 | geo->sectors = diskinfo[1]; | |
1048 | geo->cylinders = diskinfo[2]; | |
1da177e4 LT |
1049 | return 0; |
1050 | } | |
1051 | ||
1052 | /** | |
1053 | * sd_ioctl - process an ioctl | |
1054 | * @inode: only i_rdev/i_bdev members may be used | |
1055 | * @filp: only f_mode and f_flags may be used | |
1056 | * @cmd: ioctl command number | |
1057 | * @arg: this is third argument given to ioctl(2) system call. | |
1058 | * Often contains a pointer. | |
1059 | * | |
25985edc | 1060 | * Returns 0 if successful (some ioctls return positive numbers on |
1da177e4 LT |
1061 | * success as well). Returns a negated errno value in case of error. |
1062 | * | |
1063 | * Note: most ioctls are forward onto the block subsystem or further | |
3a4fa0a2 | 1064 | * down in the scsi subsystem. |
1da177e4 | 1065 | **/ |
0338e291 | 1066 | static int sd_ioctl(struct block_device *bdev, fmode_t mode, |
1da177e4 LT |
1067 | unsigned int cmd, unsigned long arg) |
1068 | { | |
1da177e4 | 1069 | struct gendisk *disk = bdev->bd_disk; |
fe2d1851 NN |
1070 | struct scsi_disk *sdkp = scsi_disk(disk); |
1071 | struct scsi_device *sdp = sdkp->device; | |
1da177e4 LT |
1072 | void __user *p = (void __user *)arg; |
1073 | int error; | |
1074 | ||
fe2d1851 NN |
1075 | SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO, sdkp, "sd_ioctl: disk=%s, " |
1076 | "cmd=0x%x\n", disk->disk_name, cmd)); | |
1da177e4 | 1077 | |
0bfc96cb PB |
1078 | error = scsi_verify_blk_ioctl(bdev, cmd); |
1079 | if (error < 0) | |
1080 | return error; | |
1081 | ||
1da177e4 LT |
1082 | /* |
1083 | * If we are in the middle of error recovery, don't let anyone | |
1084 | * else try and use this device. Also, if error recovery fails, it | |
1085 | * may try and take the device offline, in which case all further | |
1086 | * access to the device is prohibited. | |
1087 | */ | |
83ff6fe8 | 1088 | error = scsi_nonblockable_ioctl(sdp, cmd, p, |
fd4ce1ac | 1089 | (mode & FMODE_NDELAY) != 0); |
1da177e4 | 1090 | if (!scsi_block_when_processing_errors(sdp) || !error) |
8a6cfeb6 | 1091 | goto out; |
1da177e4 | 1092 | |
1da177e4 LT |
1093 | /* |
1094 | * Send SCSI addressing ioctls directly to mid level, send other | |
1095 | * ioctls to block level and then onto mid level if they can't be | |
1096 | * resolved. | |
1097 | */ | |
1098 | switch (cmd) { | |
1099 | case SCSI_IOCTL_GET_IDLUN: | |
1100 | case SCSI_IOCTL_GET_BUS_NUMBER: | |
8a6cfeb6 AB |
1101 | error = scsi_ioctl(sdp, cmd, p); |
1102 | break; | |
1da177e4 | 1103 | default: |
577ebb37 | 1104 | error = scsi_cmd_blk_ioctl(bdev, mode, cmd, p); |
1da177e4 | 1105 | if (error != -ENOTTY) |
8a6cfeb6 AB |
1106 | break; |
1107 | error = scsi_ioctl(sdp, cmd, p); | |
1108 | break; | |
1da177e4 | 1109 | } |
8a6cfeb6 | 1110 | out: |
8a6cfeb6 | 1111 | return error; |
1da177e4 LT |
1112 | } |
1113 | ||
1114 | static void set_media_not_present(struct scsi_disk *sdkp) | |
1115 | { | |
2bae0093 TH |
1116 | if (sdkp->media_present) |
1117 | sdkp->device->changed = 1; | |
1118 | ||
1119 | if (sdkp->device->removable) { | |
1120 | sdkp->media_present = 0; | |
1121 | sdkp->capacity = 0; | |
1122 | } | |
1123 | } | |
1124 | ||
1125 | static int media_not_present(struct scsi_disk *sdkp, | |
1126 | struct scsi_sense_hdr *sshdr) | |
1127 | { | |
1128 | if (!scsi_sense_valid(sshdr)) | |
1129 | return 0; | |
1130 | ||
1131 | /* not invoked for commands that could return deferred errors */ | |
1132 | switch (sshdr->sense_key) { | |
1133 | case UNIT_ATTENTION: | |
1134 | case NOT_READY: | |
1135 | /* medium not present */ | |
1136 | if (sshdr->asc == 0x3A) { | |
1137 | set_media_not_present(sdkp); | |
1138 | return 1; | |
1139 | } | |
1140 | } | |
1141 | return 0; | |
1da177e4 LT |
1142 | } |
1143 | ||
1144 | /** | |
2bae0093 TH |
1145 | * sd_check_events - check media events |
1146 | * @disk: kernel device descriptor | |
1147 | * @clearing: disk events currently being cleared | |
1da177e4 | 1148 | * |
2bae0093 | 1149 | * Returns mask of DISK_EVENT_*. |
1da177e4 LT |
1150 | * |
1151 | * Note: this function is invoked from the block subsystem. | |
1152 | **/ | |
2bae0093 | 1153 | static unsigned int sd_check_events(struct gendisk *disk, unsigned int clearing) |
1da177e4 LT |
1154 | { |
1155 | struct scsi_disk *sdkp = scsi_disk(disk); | |
1156 | struct scsi_device *sdp = sdkp->device; | |
001aac25 | 1157 | struct scsi_sense_hdr *sshdr = NULL; |
1da177e4 LT |
1158 | int retval; |
1159 | ||
2bae0093 | 1160 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_check_events\n")); |
1da177e4 LT |
1161 | |
1162 | /* | |
1163 | * If the device is offline, don't send any commands - just pretend as | |
1164 | * if the command failed. If the device ever comes back online, we | |
1165 | * can deal with it then. It is only because of unrecoverable errors | |
1166 | * that we would ever take a device offline in the first place. | |
1167 | */ | |
285e9670 KS |
1168 | if (!scsi_device_online(sdp)) { |
1169 | set_media_not_present(sdkp); | |
285e9670 KS |
1170 | goto out; |
1171 | } | |
1da177e4 LT |
1172 | |
1173 | /* | |
1174 | * Using TEST_UNIT_READY enables differentiation between drive with | |
1175 | * no cartridge loaded - NOT READY, drive with changed cartridge - | |
1176 | * UNIT ATTENTION, or with same cartridge - GOOD STATUS. | |
1177 | * | |
1178 | * Drives that auto spin down. eg iomega jaz 1G, will be started | |
1179 | * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever | |
1180 | * sd_revalidate() is called. | |
1181 | */ | |
1182 | retval = -ENODEV; | |
285e9670 | 1183 | |
001aac25 JB |
1184 | if (scsi_block_when_processing_errors(sdp)) { |
1185 | sshdr = kzalloc(sizeof(*sshdr), GFP_KERNEL); | |
1186 | retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, SD_MAX_RETRIES, | |
1187 | sshdr); | |
1188 | } | |
1da177e4 | 1189 | |
2bae0093 TH |
1190 | /* failed to execute TUR, assume media not present */ |
1191 | if (host_byte(retval)) { | |
285e9670 | 1192 | set_media_not_present(sdkp); |
285e9670 KS |
1193 | goto out; |
1194 | } | |
1da177e4 | 1195 | |
2bae0093 TH |
1196 | if (media_not_present(sdkp, sshdr)) |
1197 | goto out; | |
1198 | ||
1da177e4 LT |
1199 | /* |
1200 | * For removable scsi disk we have to recognise the presence | |
2bae0093 | 1201 | * of a disk in the drive. |
1da177e4 | 1202 | */ |
2bae0093 TH |
1203 | if (!sdkp->media_present) |
1204 | sdp->changed = 1; | |
1da177e4 | 1205 | sdkp->media_present = 1; |
285e9670 | 1206 | out: |
3ff5588d | 1207 | /* |
2bae0093 | 1208 | * sdp->changed is set under the following conditions: |
3ff5588d | 1209 | * |
2bae0093 TH |
1210 | * Medium present state has changed in either direction. |
1211 | * Device has indicated UNIT_ATTENTION. | |
3ff5588d | 1212 | */ |
001aac25 | 1213 | kfree(sshdr); |
2bae0093 TH |
1214 | retval = sdp->changed ? DISK_EVENT_MEDIA_CHANGE : 0; |
1215 | sdp->changed = 0; | |
1da177e4 | 1216 | return retval; |
1da177e4 LT |
1217 | } |
1218 | ||
e73aec82 | 1219 | static int sd_sync_cache(struct scsi_disk *sdkp) |
1da177e4 | 1220 | { |
1da177e4 | 1221 | int retries, res; |
e73aec82 | 1222 | struct scsi_device *sdp = sdkp->device; |
ea73a9f2 | 1223 | struct scsi_sense_hdr sshdr; |
1da177e4 LT |
1224 | |
1225 | if (!scsi_device_online(sdp)) | |
1226 | return -ENODEV; | |
1227 | ||
1da177e4 | 1228 | |
1da177e4 LT |
1229 | for (retries = 3; retries > 0; --retries) { |
1230 | unsigned char cmd[10] = { 0 }; | |
1231 | ||
1232 | cmd[0] = SYNCHRONIZE_CACHE; | |
1233 | /* | |
1234 | * Leave the rest of the command zero to indicate | |
1235 | * flush everything. | |
1236 | */ | |
ea73a9f2 | 1237 | res = scsi_execute_req(sdp, cmd, DMA_NONE, NULL, 0, &sshdr, |
e3b3e624 | 1238 | SD_FLUSH_TIMEOUT, SD_MAX_RETRIES, NULL); |
ea73a9f2 | 1239 | if (res == 0) |
1da177e4 LT |
1240 | break; |
1241 | } | |
1242 | ||
e73aec82 MP |
1243 | if (res) { |
1244 | sd_print_result(sdkp, res); | |
1245 | if (driver_byte(res) & DRIVER_SENSE) | |
1246 | sd_print_sense_hdr(sdkp, &sshdr); | |
1da177e4 LT |
1247 | } |
1248 | ||
3721050a TH |
1249 | if (res) |
1250 | return -EIO; | |
1251 | return 0; | |
1da177e4 LT |
1252 | } |
1253 | ||
1da177e4 LT |
1254 | static void sd_rescan(struct device *dev) |
1255 | { | |
39b7f1e2 AS |
1256 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
1257 | ||
1258 | if (sdkp) { | |
f98a8cae | 1259 | revalidate_disk(sdkp->disk); |
39b7f1e2 AS |
1260 | scsi_disk_put(sdkp); |
1261 | } | |
1da177e4 LT |
1262 | } |
1263 | ||
1264 | ||
1265 | #ifdef CONFIG_COMPAT | |
1266 | /* | |
1267 | * This gets directly called from VFS. When the ioctl | |
1268 | * is not recognized we go back to the other translation paths. | |
1269 | */ | |
0338e291 AV |
1270 | static int sd_compat_ioctl(struct block_device *bdev, fmode_t mode, |
1271 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1272 | { |
0338e291 | 1273 | struct scsi_device *sdev = scsi_disk(bdev->bd_disk)->device; |
0bfc96cb PB |
1274 | int ret; |
1275 | ||
1276 | ret = scsi_verify_blk_ioctl(bdev, cmd); | |
1277 | if (ret < 0) | |
1278 | return ret; | |
1da177e4 LT |
1279 | |
1280 | /* | |
1281 | * If we are in the middle of error recovery, don't let anyone | |
1282 | * else try and use this device. Also, if error recovery fails, it | |
1283 | * may try and take the device offline, in which case all further | |
1284 | * access to the device is prohibited. | |
1285 | */ | |
1286 | if (!scsi_block_when_processing_errors(sdev)) | |
1287 | return -ENODEV; | |
1288 | ||
1289 | if (sdev->host->hostt->compat_ioctl) { | |
1da177e4 LT |
1290 | ret = sdev->host->hostt->compat_ioctl(sdev, cmd, (void __user *)arg); |
1291 | ||
1292 | return ret; | |
1293 | } | |
1294 | ||
1295 | /* | |
1296 | * Let the static ioctl translation table take care of it. | |
1297 | */ | |
1298 | return -ENOIOCTLCMD; | |
1299 | } | |
1300 | #endif | |
1301 | ||
83d5cde4 | 1302 | static const struct block_device_operations sd_fops = { |
1da177e4 | 1303 | .owner = THIS_MODULE, |
0338e291 AV |
1304 | .open = sd_open, |
1305 | .release = sd_release, | |
8a6cfeb6 | 1306 | .ioctl = sd_ioctl, |
a885c8c4 | 1307 | .getgeo = sd_getgeo, |
1da177e4 | 1308 | #ifdef CONFIG_COMPAT |
0338e291 | 1309 | .compat_ioctl = sd_compat_ioctl, |
1da177e4 | 1310 | #endif |
2bae0093 | 1311 | .check_events = sd_check_events, |
1da177e4 | 1312 | .revalidate_disk = sd_revalidate_disk, |
72ec24bd | 1313 | .unlock_native_capacity = sd_unlock_native_capacity, |
1da177e4 LT |
1314 | }; |
1315 | ||
af55ff67 MP |
1316 | static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd) |
1317 | { | |
83096ebf TH |
1318 | u64 start_lba = blk_rq_pos(scmd->request); |
1319 | u64 end_lba = blk_rq_pos(scmd->request) + (scsi_bufflen(scmd) / 512); | |
af55ff67 MP |
1320 | u64 bad_lba; |
1321 | int info_valid; | |
a8733c7b JB |
1322 | /* |
1323 | * resid is optional but mostly filled in. When it's unused, | |
1324 | * its value is zero, so we assume the whole buffer transferred | |
1325 | */ | |
1326 | unsigned int transferred = scsi_bufflen(scmd) - scsi_get_resid(scmd); | |
1327 | unsigned int good_bytes; | |
af55ff67 | 1328 | |
33659ebb | 1329 | if (scmd->request->cmd_type != REQ_TYPE_FS) |
af55ff67 MP |
1330 | return 0; |
1331 | ||
1332 | info_valid = scsi_get_sense_info_fld(scmd->sense_buffer, | |
1333 | SCSI_SENSE_BUFFERSIZE, | |
1334 | &bad_lba); | |
1335 | if (!info_valid) | |
1336 | return 0; | |
1337 | ||
1338 | if (scsi_bufflen(scmd) <= scmd->device->sector_size) | |
1339 | return 0; | |
1340 | ||
1341 | if (scmd->device->sector_size < 512) { | |
1342 | /* only legitimate sector_size here is 256 */ | |
1343 | start_lba <<= 1; | |
1344 | end_lba <<= 1; | |
1345 | } else { | |
1346 | /* be careful ... don't want any overflows */ | |
1347 | u64 factor = scmd->device->sector_size / 512; | |
1348 | do_div(start_lba, factor); | |
1349 | do_div(end_lba, factor); | |
1350 | } | |
1351 | ||
1352 | /* The bad lba was reported incorrectly, we have no idea where | |
1353 | * the error is. | |
1354 | */ | |
1355 | if (bad_lba < start_lba || bad_lba >= end_lba) | |
1356 | return 0; | |
1357 | ||
1358 | /* This computation should always be done in terms of | |
1359 | * the resolution of the device's medium. | |
1360 | */ | |
a8733c7b JB |
1361 | good_bytes = (bad_lba - start_lba) * scmd->device->sector_size; |
1362 | return min(good_bytes, transferred); | |
af55ff67 MP |
1363 | } |
1364 | ||
1da177e4 | 1365 | /** |
7b3d9545 | 1366 | * sd_done - bottom half handler: called when the lower level |
1da177e4 LT |
1367 | * driver has completed (successfully or otherwise) a scsi command. |
1368 | * @SCpnt: mid-level's per command structure. | |
1369 | * | |
1370 | * Note: potentially run from within an ISR. Must not block. | |
1371 | **/ | |
7b3d9545 | 1372 | static int sd_done(struct scsi_cmnd *SCpnt) |
1da177e4 LT |
1373 | { |
1374 | int result = SCpnt->result; | |
af55ff67 | 1375 | unsigned int good_bytes = result ? 0 : scsi_bufflen(SCpnt); |
1da177e4 | 1376 | struct scsi_sense_hdr sshdr; |
4e7392ec | 1377 | struct scsi_disk *sdkp = scsi_disk(SCpnt->request->rq_disk); |
1da177e4 LT |
1378 | int sense_valid = 0; |
1379 | int sense_deferred = 0; | |
c98a0eb0 | 1380 | unsigned char op = SCpnt->cmnd[0]; |
1da177e4 | 1381 | |
c98a0eb0 MP |
1382 | if ((SCpnt->request->cmd_flags & REQ_DISCARD) && !result) |
1383 | scsi_set_resid(SCpnt, 0); | |
6a32a8ae | 1384 | |
1da177e4 LT |
1385 | if (result) { |
1386 | sense_valid = scsi_command_normalize_sense(SCpnt, &sshdr); | |
1387 | if (sense_valid) | |
1388 | sense_deferred = scsi_sense_is_deferred(&sshdr); | |
1389 | } | |
1da177e4 | 1390 | #ifdef CONFIG_SCSI_LOGGING |
fa0d34be | 1391 | SCSI_LOG_HLCOMPLETE(1, scsi_print_result(SCpnt)); |
1da177e4 | 1392 | if (sense_valid) { |
fa0d34be | 1393 | SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO, SCpnt, |
7b3d9545 | 1394 | "sd_done: sb[respc,sk,asc," |
fa0d34be MP |
1395 | "ascq]=%x,%x,%x,%x\n", |
1396 | sshdr.response_code, | |
1397 | sshdr.sense_key, sshdr.asc, | |
1398 | sshdr.ascq)); | |
1da177e4 LT |
1399 | } |
1400 | #endif | |
03aba2f7 LT |
1401 | if (driver_byte(result) != DRIVER_SENSE && |
1402 | (!sense_valid || sense_deferred)) | |
1403 | goto out; | |
1404 | ||
1405 | switch (sshdr.sense_key) { | |
1406 | case HARDWARE_ERROR: | |
1407 | case MEDIUM_ERROR: | |
af55ff67 | 1408 | good_bytes = sd_completed_bytes(SCpnt); |
03aba2f7 LT |
1409 | break; |
1410 | case RECOVERED_ERROR: | |
af55ff67 MP |
1411 | good_bytes = scsi_bufflen(SCpnt); |
1412 | break; | |
10dab226 JW |
1413 | case NO_SENSE: |
1414 | /* This indicates a false check condition, so ignore it. An | |
1415 | * unknown amount of data was transferred so treat it as an | |
1416 | * error. | |
1417 | */ | |
1418 | scsi_print_sense("sd", SCpnt); | |
1419 | SCpnt->result = 0; | |
1420 | memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); | |
1421 | break; | |
c98a0eb0 MP |
1422 | case ABORTED_COMMAND: |
1423 | if (sshdr.asc == 0x10) /* DIF: Target detected corruption */ | |
1424 | good_bytes = sd_completed_bytes(SCpnt); | |
1425 | break; | |
1426 | case ILLEGAL_REQUEST: | |
1427 | if (sshdr.asc == 0x10) /* DIX: Host detected corruption */ | |
af55ff67 | 1428 | good_bytes = sd_completed_bytes(SCpnt); |
c98a0eb0 MP |
1429 | /* INVALID COMMAND OPCODE or INVALID FIELD IN CDB */ |
1430 | if ((sshdr.asc == 0x20 || sshdr.asc == 0x24) && | |
1431 | (op == UNMAP || op == WRITE_SAME_16 || op == WRITE_SAME)) | |
1432 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
03aba2f7 LT |
1433 | break; |
1434 | default: | |
1435 | break; | |
1da177e4 | 1436 | } |
03aba2f7 | 1437 | out: |
af55ff67 MP |
1438 | if (rq_data_dir(SCpnt->request) == READ && scsi_prot_sg_count(SCpnt)) |
1439 | sd_dif_complete(SCpnt, good_bytes); | |
1440 | ||
4e7392ec | 1441 | if (scsi_host_dif_capable(sdkp->device->host, sdkp->protection_type) |
77c9cfc5 MP |
1442 | == SD_DIF_TYPE2_PROTECTION && SCpnt->cmnd != SCpnt->request->cmd) { |
1443 | ||
1444 | /* We have to print a failed command here as the | |
1445 | * extended CDB gets freed before scsi_io_completion() | |
1446 | * is called. | |
1447 | */ | |
1448 | if (result) | |
1449 | scsi_print_command(SCpnt); | |
1450 | ||
4e7392ec | 1451 | mempool_free(SCpnt->cmnd, sd_cdb_pool); |
77c9cfc5 MP |
1452 | SCpnt->cmnd = NULL; |
1453 | SCpnt->cmd_len = 0; | |
1454 | } | |
4e7392ec | 1455 | |
7b3d9545 | 1456 | return good_bytes; |
1da177e4 LT |
1457 | } |
1458 | ||
1da177e4 LT |
1459 | /* |
1460 | * spinup disk - called only in sd_revalidate_disk() | |
1461 | */ | |
1462 | static void | |
e73aec82 | 1463 | sd_spinup_disk(struct scsi_disk *sdkp) |
ea73a9f2 | 1464 | { |
1da177e4 | 1465 | unsigned char cmd[10]; |
4451e472 | 1466 | unsigned long spintime_expire = 0; |
1da177e4 LT |
1467 | int retries, spintime; |
1468 | unsigned int the_result; | |
1469 | struct scsi_sense_hdr sshdr; | |
1470 | int sense_valid = 0; | |
1471 | ||
1472 | spintime = 0; | |
1473 | ||
1474 | /* Spin up drives, as required. Only do this at boot time */ | |
1475 | /* Spinup needs to be done for module loads too. */ | |
1476 | do { | |
1477 | retries = 0; | |
1478 | ||
1479 | do { | |
1480 | cmd[0] = TEST_UNIT_READY; | |
1481 | memset((void *) &cmd[1], 0, 9); | |
1482 | ||
ea73a9f2 JB |
1483 | the_result = scsi_execute_req(sdkp->device, cmd, |
1484 | DMA_NONE, NULL, 0, | |
1485 | &sshdr, SD_TIMEOUT, | |
f4f4e47e | 1486 | SD_MAX_RETRIES, NULL); |
1da177e4 | 1487 | |
b4d38e38 AS |
1488 | /* |
1489 | * If the drive has indicated to us that it | |
1490 | * doesn't have any media in it, don't bother | |
1491 | * with any more polling. | |
1492 | */ | |
1493 | if (media_not_present(sdkp, &sshdr)) | |
1494 | return; | |
1495 | ||
1da177e4 | 1496 | if (the_result) |
ea73a9f2 | 1497 | sense_valid = scsi_sense_valid(&sshdr); |
1da177e4 LT |
1498 | retries++; |
1499 | } while (retries < 3 && | |
1500 | (!scsi_status_is_good(the_result) || | |
1501 | ((driver_byte(the_result) & DRIVER_SENSE) && | |
1502 | sense_valid && sshdr.sense_key == UNIT_ATTENTION))); | |
1503 | ||
1da177e4 LT |
1504 | if ((driver_byte(the_result) & DRIVER_SENSE) == 0) { |
1505 | /* no sense, TUR either succeeded or failed | |
1506 | * with a status error */ | |
e73aec82 MP |
1507 | if(!spintime && !scsi_status_is_good(the_result)) { |
1508 | sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n"); | |
1509 | sd_print_result(sdkp, the_result); | |
1510 | } | |
1da177e4 LT |
1511 | break; |
1512 | } | |
1513 | ||
1514 | /* | |
1515 | * The device does not want the automatic start to be issued. | |
1516 | */ | |
33dd6f92 | 1517 | if (sdkp->device->no_start_on_add) |
1da177e4 | 1518 | break; |
1da177e4 | 1519 | |
33dd6f92 MW |
1520 | if (sense_valid && sshdr.sense_key == NOT_READY) { |
1521 | if (sshdr.asc == 4 && sshdr.ascq == 3) | |
1522 | break; /* manual intervention required */ | |
1523 | if (sshdr.asc == 4 && sshdr.ascq == 0xb) | |
1524 | break; /* standby */ | |
1525 | if (sshdr.asc == 4 && sshdr.ascq == 0xc) | |
1526 | break; /* unavailable */ | |
1527 | /* | |
1528 | * Issue command to spin up drive when not ready | |
1529 | */ | |
1da177e4 | 1530 | if (!spintime) { |
e73aec82 | 1531 | sd_printk(KERN_NOTICE, sdkp, "Spinning up disk..."); |
1da177e4 LT |
1532 | cmd[0] = START_STOP; |
1533 | cmd[1] = 1; /* Return immediately */ | |
1534 | memset((void *) &cmd[2], 0, 8); | |
1535 | cmd[4] = 1; /* Start spin cycle */ | |
d2886ea3 SR |
1536 | if (sdkp->device->start_stop_pwr_cond) |
1537 | cmd[4] |= 1 << 4; | |
ea73a9f2 JB |
1538 | scsi_execute_req(sdkp->device, cmd, DMA_NONE, |
1539 | NULL, 0, &sshdr, | |
f4f4e47e FT |
1540 | SD_TIMEOUT, SD_MAX_RETRIES, |
1541 | NULL); | |
4451e472 AS |
1542 | spintime_expire = jiffies + 100 * HZ; |
1543 | spintime = 1; | |
1da177e4 | 1544 | } |
1da177e4 LT |
1545 | /* Wait 1 second for next try */ |
1546 | msleep(1000); | |
1547 | printk("."); | |
4451e472 AS |
1548 | |
1549 | /* | |
1550 | * Wait for USB flash devices with slow firmware. | |
1551 | * Yes, this sense key/ASC combination shouldn't | |
1552 | * occur here. It's characteristic of these devices. | |
1553 | */ | |
1554 | } else if (sense_valid && | |
1555 | sshdr.sense_key == UNIT_ATTENTION && | |
1556 | sshdr.asc == 0x28) { | |
1557 | if (!spintime) { | |
1558 | spintime_expire = jiffies + 5 * HZ; | |
1559 | spintime = 1; | |
1560 | } | |
1561 | /* Wait 1 second for next try */ | |
1562 | msleep(1000); | |
1da177e4 LT |
1563 | } else { |
1564 | /* we don't understand the sense code, so it's | |
1565 | * probably pointless to loop */ | |
1566 | if(!spintime) { | |
e73aec82 MP |
1567 | sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n"); |
1568 | sd_print_sense_hdr(sdkp, &sshdr); | |
1da177e4 LT |
1569 | } |
1570 | break; | |
1571 | } | |
1572 | ||
4451e472 | 1573 | } while (spintime && time_before_eq(jiffies, spintime_expire)); |
1da177e4 LT |
1574 | |
1575 | if (spintime) { | |
1576 | if (scsi_status_is_good(the_result)) | |
1577 | printk("ready\n"); | |
1578 | else | |
1579 | printk("not responding...\n"); | |
1580 | } | |
1581 | } | |
1582 | ||
e0597d70 MP |
1583 | |
1584 | /* | |
1585 | * Determine whether disk supports Data Integrity Field. | |
1586 | */ | |
439d77f7 | 1587 | static void sd_read_protection_type(struct scsi_disk *sdkp, unsigned char *buffer) |
e0597d70 MP |
1588 | { |
1589 | struct scsi_device *sdp = sdkp->device; | |
1590 | u8 type; | |
1591 | ||
1592 | if (scsi_device_protection(sdp) == 0 || (buffer[12] & 1) == 0) | |
35e1a5d9 MP |
1593 | return; |
1594 | ||
1595 | type = ((buffer[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */ | |
1596 | ||
1597 | if (type == sdkp->protection_type || !sdkp->first_scan) | |
1598 | return; | |
e0597d70 | 1599 | |
be922f47 MP |
1600 | sdkp->protection_type = type; |
1601 | ||
4e7392ec | 1602 | if (type > SD_DIF_TYPE3_PROTECTION) { |
35e1a5d9 MP |
1603 | sd_printk(KERN_ERR, sdkp, "formatted with unsupported " \ |
1604 | "protection type %u. Disabling disk!\n", type); | |
1605 | sdkp->capacity = 0; | |
1606 | return; | |
e0597d70 MP |
1607 | } |
1608 | ||
35e1a5d9 MP |
1609 | if (scsi_host_dif_capable(sdp->host, type)) |
1610 | sd_printk(KERN_NOTICE, sdkp, | |
1611 | "Enabling DIF Type %u protection\n", type); | |
1612 | else | |
1613 | sd_printk(KERN_NOTICE, sdkp, | |
1614 | "Disabling DIF Type %u protection\n", type); | |
e0597d70 MP |
1615 | } |
1616 | ||
0da205e0 MW |
1617 | static void read_capacity_error(struct scsi_disk *sdkp, struct scsi_device *sdp, |
1618 | struct scsi_sense_hdr *sshdr, int sense_valid, | |
1619 | int the_result) | |
1620 | { | |
1621 | sd_print_result(sdkp, the_result); | |
1622 | if (driver_byte(the_result) & DRIVER_SENSE) | |
1623 | sd_print_sense_hdr(sdkp, sshdr); | |
1624 | else | |
1625 | sd_printk(KERN_NOTICE, sdkp, "Sense not available.\n"); | |
1626 | ||
1627 | /* | |
1628 | * Set dirty bit for removable devices if not ready - | |
1629 | * sometimes drives will not report this properly. | |
1630 | */ | |
1631 | if (sdp->removable && | |
1632 | sense_valid && sshdr->sense_key == NOT_READY) | |
2bae0093 | 1633 | set_media_not_present(sdkp); |
0da205e0 MW |
1634 | |
1635 | /* | |
1636 | * We used to set media_present to 0 here to indicate no media | |
1637 | * in the drive, but some drives fail read capacity even with | |
1638 | * media present, so we can't do that. | |
1639 | */ | |
1640 | sdkp->capacity = 0; /* unknown mapped to zero - as usual */ | |
1641 | } | |
1642 | ||
1643 | #define RC16_LEN 32 | |
1644 | #if RC16_LEN > SD_BUF_SIZE | |
1645 | #error RC16_LEN must not be more than SD_BUF_SIZE | |
1646 | #endif | |
1647 | ||
3233ac19 JB |
1648 | #define READ_CAPACITY_RETRIES_ON_RESET 10 |
1649 | ||
0da205e0 MW |
1650 | static int read_capacity_16(struct scsi_disk *sdkp, struct scsi_device *sdp, |
1651 | unsigned char *buffer) | |
ea73a9f2 | 1652 | { |
1da177e4 | 1653 | unsigned char cmd[16]; |
1da177e4 LT |
1654 | struct scsi_sense_hdr sshdr; |
1655 | int sense_valid = 0; | |
0da205e0 | 1656 | int the_result; |
3233ac19 | 1657 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
ea09bcc9 | 1658 | unsigned int alignment; |
0da205e0 MW |
1659 | unsigned long long lba; |
1660 | unsigned sector_size; | |
1da177e4 | 1661 | |
5ce524bd HG |
1662 | if (sdp->no_read_capacity_16) |
1663 | return -EINVAL; | |
1664 | ||
1da177e4 | 1665 | do { |
0da205e0 MW |
1666 | memset(cmd, 0, 16); |
1667 | cmd[0] = SERVICE_ACTION_IN; | |
1668 | cmd[1] = SAI_READ_CAPACITY_16; | |
1669 | cmd[13] = RC16_LEN; | |
1670 | memset(buffer, 0, RC16_LEN); | |
1671 | ||
ea73a9f2 | 1672 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, |
0da205e0 MW |
1673 | buffer, RC16_LEN, &sshdr, |
1674 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
1da177e4 | 1675 | |
ea73a9f2 | 1676 | if (media_not_present(sdkp, &sshdr)) |
0da205e0 | 1677 | return -ENODEV; |
1da177e4 | 1678 | |
2b301307 | 1679 | if (the_result) { |
ea73a9f2 | 1680 | sense_valid = scsi_sense_valid(&sshdr); |
2b301307 MW |
1681 | if (sense_valid && |
1682 | sshdr.sense_key == ILLEGAL_REQUEST && | |
1683 | (sshdr.asc == 0x20 || sshdr.asc == 0x24) && | |
1684 | sshdr.ascq == 0x00) | |
1685 | /* Invalid Command Operation Code or | |
1686 | * Invalid Field in CDB, just retry | |
1687 | * silently with RC10 */ | |
1688 | return -EINVAL; | |
3233ac19 JB |
1689 | if (sense_valid && |
1690 | sshdr.sense_key == UNIT_ATTENTION && | |
1691 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) | |
1692 | /* Device reset might occur several times, | |
1693 | * give it one more chance */ | |
1694 | if (--reset_retries > 0) | |
1695 | continue; | |
2b301307 | 1696 | } |
1da177e4 LT |
1697 | retries--; |
1698 | ||
1699 | } while (the_result && retries); | |
1700 | ||
0da205e0 | 1701 | if (the_result) { |
e73aec82 | 1702 | sd_printk(KERN_NOTICE, sdkp, "READ CAPACITY(16) failed\n"); |
0da205e0 MW |
1703 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); |
1704 | return -EINVAL; | |
1705 | } | |
e73aec82 | 1706 | |
8f76d151 DH |
1707 | sector_size = get_unaligned_be32(&buffer[8]); |
1708 | lba = get_unaligned_be64(&buffer[0]); | |
0da205e0 MW |
1709 | |
1710 | sd_read_protection_type(sdkp, buffer); | |
1711 | ||
1712 | if ((sizeof(sdkp->capacity) == 4) && (lba >= 0xffffffffULL)) { | |
1713 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a " | |
1714 | "kernel compiled with support for large block " | |
1715 | "devices.\n"); | |
1716 | sdkp->capacity = 0; | |
1717 | return -EOVERFLOW; | |
1718 | } | |
1719 | ||
ea09bcc9 | 1720 | /* Logical blocks per physical block exponent */ |
526f7c79 | 1721 | sdkp->physical_block_size = (1 << (buffer[13] & 0xf)) * sector_size; |
ea09bcc9 MP |
1722 | |
1723 | /* Lowest aligned logical block */ | |
1724 | alignment = ((buffer[14] & 0x3f) << 8 | buffer[15]) * sector_size; | |
1725 | blk_queue_alignment_offset(sdp->request_queue, alignment); | |
1726 | if (alignment && sdkp->first_scan) | |
1727 | sd_printk(KERN_NOTICE, sdkp, | |
1728 | "physical block alignment offset: %u\n", alignment); | |
1729 | ||
c98a0eb0 MP |
1730 | if (buffer[14] & 0x80) { /* LBPME */ |
1731 | sdkp->lbpme = 1; | |
e339c1a7 | 1732 | |
c98a0eb0 MP |
1733 | if (buffer[14] & 0x40) /* LBPRZ */ |
1734 | sdkp->lbprz = 1; | |
e339c1a7 | 1735 | |
c98a0eb0 | 1736 | sd_config_discard(sdkp, SD_LBP_WS16); |
e339c1a7 MP |
1737 | } |
1738 | ||
0da205e0 MW |
1739 | sdkp->capacity = lba + 1; |
1740 | return sector_size; | |
1741 | } | |
1742 | ||
1743 | static int read_capacity_10(struct scsi_disk *sdkp, struct scsi_device *sdp, | |
1744 | unsigned char *buffer) | |
1745 | { | |
1746 | unsigned char cmd[16]; | |
1747 | struct scsi_sense_hdr sshdr; | |
1748 | int sense_valid = 0; | |
1749 | int the_result; | |
3233ac19 | 1750 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
0da205e0 MW |
1751 | sector_t lba; |
1752 | unsigned sector_size; | |
1753 | ||
1754 | do { | |
1755 | cmd[0] = READ_CAPACITY; | |
1756 | memset(&cmd[1], 0, 9); | |
1757 | memset(buffer, 0, 8); | |
1758 | ||
1759 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, | |
1760 | buffer, 8, &sshdr, | |
1761 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
1762 | ||
1763 | if (media_not_present(sdkp, &sshdr)) | |
1764 | return -ENODEV; | |
1765 | ||
3233ac19 | 1766 | if (the_result) { |
0da205e0 | 1767 | sense_valid = scsi_sense_valid(&sshdr); |
3233ac19 JB |
1768 | if (sense_valid && |
1769 | sshdr.sense_key == UNIT_ATTENTION && | |
1770 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) | |
1771 | /* Device reset might occur several times, | |
1772 | * give it one more chance */ | |
1773 | if (--reset_retries > 0) | |
1774 | continue; | |
1775 | } | |
0da205e0 MW |
1776 | retries--; |
1777 | ||
1778 | } while (the_result && retries); | |
1779 | ||
1780 | if (the_result) { | |
1781 | sd_printk(KERN_NOTICE, sdkp, "READ CAPACITY failed\n"); | |
1782 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); | |
1783 | return -EINVAL; | |
1784 | } | |
1785 | ||
8f76d151 DH |
1786 | sector_size = get_unaligned_be32(&buffer[4]); |
1787 | lba = get_unaligned_be32(&buffer[0]); | |
0da205e0 | 1788 | |
5ce524bd HG |
1789 | if (sdp->no_read_capacity_16 && (lba == 0xffffffff)) { |
1790 | /* Some buggy (usb cardreader) devices return an lba of | |
1791 | 0xffffffff when the want to report a size of 0 (with | |
1792 | which they really mean no media is present) */ | |
1793 | sdkp->capacity = 0; | |
5cc10350 | 1794 | sdkp->physical_block_size = sector_size; |
5ce524bd HG |
1795 | return sector_size; |
1796 | } | |
1797 | ||
0da205e0 MW |
1798 | if ((sizeof(sdkp->capacity) == 4) && (lba == 0xffffffff)) { |
1799 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a " | |
1800 | "kernel compiled with support for large block " | |
1801 | "devices.\n"); | |
1802 | sdkp->capacity = 0; | |
1803 | return -EOVERFLOW; | |
1804 | } | |
1805 | ||
1806 | sdkp->capacity = lba + 1; | |
526f7c79 | 1807 | sdkp->physical_block_size = sector_size; |
0da205e0 MW |
1808 | return sector_size; |
1809 | } | |
1810 | ||
2b301307 MW |
1811 | static int sd_try_rc16_first(struct scsi_device *sdp) |
1812 | { | |
f87146bb HR |
1813 | if (sdp->host->max_cmd_len < 16) |
1814 | return 0; | |
2b301307 MW |
1815 | if (sdp->scsi_level > SCSI_SPC_2) |
1816 | return 1; | |
1817 | if (scsi_device_protection(sdp)) | |
1818 | return 1; | |
1819 | return 0; | |
1820 | } | |
1821 | ||
0da205e0 MW |
1822 | /* |
1823 | * read disk capacity | |
1824 | */ | |
1825 | static void | |
1826 | sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer) | |
1827 | { | |
1828 | int sector_size; | |
1829 | struct scsi_device *sdp = sdkp->device; | |
70a9b873 | 1830 | sector_t old_capacity = sdkp->capacity; |
0da205e0 | 1831 | |
2b301307 | 1832 | if (sd_try_rc16_first(sdp)) { |
0da205e0 MW |
1833 | sector_size = read_capacity_16(sdkp, sdp, buffer); |
1834 | if (sector_size == -EOVERFLOW) | |
1da177e4 | 1835 | goto got_data; |
2b301307 MW |
1836 | if (sector_size == -ENODEV) |
1837 | return; | |
1838 | if (sector_size < 0) | |
1839 | sector_size = read_capacity_10(sdkp, sdp, buffer); | |
0da205e0 MW |
1840 | if (sector_size < 0) |
1841 | return; | |
1da177e4 | 1842 | } else { |
0da205e0 MW |
1843 | sector_size = read_capacity_10(sdkp, sdp, buffer); |
1844 | if (sector_size == -EOVERFLOW) | |
1845 | goto got_data; | |
1846 | if (sector_size < 0) | |
1847 | return; | |
1848 | if ((sizeof(sdkp->capacity) > 4) && | |
1849 | (sdkp->capacity > 0xffffffffULL)) { | |
1850 | int old_sector_size = sector_size; | |
1851 | sd_printk(KERN_NOTICE, sdkp, "Very big device. " | |
1852 | "Trying to use READ CAPACITY(16).\n"); | |
1853 | sector_size = read_capacity_16(sdkp, sdp, buffer); | |
1854 | if (sector_size < 0) { | |
1855 | sd_printk(KERN_NOTICE, sdkp, | |
1856 | "Using 0xffffffff as device size\n"); | |
1857 | sdkp->capacity = 1 + (sector_t) 0xffffffff; | |
1858 | sector_size = old_sector_size; | |
1859 | goto got_data; | |
1860 | } | |
1861 | } | |
1862 | } | |
1da177e4 | 1863 | |
5c211caa AS |
1864 | /* Some devices are known to return the total number of blocks, |
1865 | * not the highest block number. Some devices have versions | |
1866 | * which do this and others which do not. Some devices we might | |
1867 | * suspect of doing this but we don't know for certain. | |
1868 | * | |
1869 | * If we know the reported capacity is wrong, decrement it. If | |
1870 | * we can only guess, then assume the number of blocks is even | |
1871 | * (usually true but not always) and err on the side of lowering | |
1872 | * the capacity. | |
1873 | */ | |
1874 | if (sdp->fix_capacity || | |
1875 | (sdp->guess_capacity && (sdkp->capacity & 0x01))) { | |
1876 | sd_printk(KERN_INFO, sdkp, "Adjusting the sector count " | |
1877 | "from its reported value: %llu\n", | |
1878 | (unsigned long long) sdkp->capacity); | |
1da177e4 | 1879 | --sdkp->capacity; |
61bf54b7 ON |
1880 | } |
1881 | ||
1da177e4 LT |
1882 | got_data: |
1883 | if (sector_size == 0) { | |
1884 | sector_size = 512; | |
e73aec82 MP |
1885 | sd_printk(KERN_NOTICE, sdkp, "Sector size 0 reported, " |
1886 | "assuming 512.\n"); | |
1da177e4 LT |
1887 | } |
1888 | ||
1889 | if (sector_size != 512 && | |
1890 | sector_size != 1024 && | |
1891 | sector_size != 2048 && | |
1892 | sector_size != 4096 && | |
1893 | sector_size != 256) { | |
e73aec82 MP |
1894 | sd_printk(KERN_NOTICE, sdkp, "Unsupported sector size %d.\n", |
1895 | sector_size); | |
1da177e4 LT |
1896 | /* |
1897 | * The user might want to re-format the drive with | |
1898 | * a supported sectorsize. Once this happens, it | |
1899 | * would be relatively trivial to set the thing up. | |
1900 | * For this reason, we leave the thing in the table. | |
1901 | */ | |
1902 | sdkp->capacity = 0; | |
1903 | /* | |
1904 | * set a bogus sector size so the normal read/write | |
1905 | * logic in the block layer will eventually refuse any | |
1906 | * request on this device without tripping over power | |
1907 | * of two sector size assumptions | |
1908 | */ | |
1909 | sector_size = 512; | |
1910 | } | |
e1defc4f | 1911 | blk_queue_logical_block_size(sdp->request_queue, sector_size); |
7404ad3b | 1912 | |
1da177e4 | 1913 | { |
7404ad3b | 1914 | char cap_str_2[10], cap_str_10[10]; |
520a2c27 | 1915 | u64 sz = (u64)sdkp->capacity << ilog2(sector_size); |
1da177e4 | 1916 | |
7404ad3b JB |
1917 | string_get_size(sz, STRING_UNITS_2, cap_str_2, |
1918 | sizeof(cap_str_2)); | |
1919 | string_get_size(sz, STRING_UNITS_10, cap_str_10, | |
1920 | sizeof(cap_str_10)); | |
1da177e4 | 1921 | |
ea09bcc9 | 1922 | if (sdkp->first_scan || old_capacity != sdkp->capacity) { |
70a9b873 | 1923 | sd_printk(KERN_NOTICE, sdkp, |
ea09bcc9 | 1924 | "%llu %d-byte logical blocks: (%s/%s)\n", |
70a9b873 MP |
1925 | (unsigned long long)sdkp->capacity, |
1926 | sector_size, cap_str_10, cap_str_2); | |
ea09bcc9 | 1927 | |
526f7c79 | 1928 | if (sdkp->physical_block_size != sector_size) |
ea09bcc9 MP |
1929 | sd_printk(KERN_NOTICE, sdkp, |
1930 | "%u-byte physical blocks\n", | |
526f7c79 | 1931 | sdkp->physical_block_size); |
ea09bcc9 | 1932 | } |
1da177e4 LT |
1933 | } |
1934 | ||
1935 | /* Rescale capacity to 512-byte units */ | |
1936 | if (sector_size == 4096) | |
1937 | sdkp->capacity <<= 3; | |
1938 | else if (sector_size == 2048) | |
1939 | sdkp->capacity <<= 2; | |
1940 | else if (sector_size == 1024) | |
1941 | sdkp->capacity <<= 1; | |
1942 | else if (sector_size == 256) | |
1943 | sdkp->capacity >>= 1; | |
1944 | ||
526f7c79 MP |
1945 | blk_queue_physical_block_size(sdp->request_queue, |
1946 | sdkp->physical_block_size); | |
1da177e4 LT |
1947 | sdkp->device->sector_size = sector_size; |
1948 | } | |
1949 | ||
1950 | /* called with buffer of length 512 */ | |
1951 | static inline int | |
ea73a9f2 JB |
1952 | sd_do_mode_sense(struct scsi_device *sdp, int dbd, int modepage, |
1953 | unsigned char *buffer, int len, struct scsi_mode_data *data, | |
1954 | struct scsi_sense_hdr *sshdr) | |
1da177e4 | 1955 | { |
ea73a9f2 | 1956 | return scsi_mode_sense(sdp, dbd, modepage, buffer, len, |
1cf72699 | 1957 | SD_TIMEOUT, SD_MAX_RETRIES, data, |
ea73a9f2 | 1958 | sshdr); |
1da177e4 LT |
1959 | } |
1960 | ||
1961 | /* | |
1962 | * read write protect setting, if possible - called only in sd_revalidate_disk() | |
48970800 | 1963 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
1964 | */ |
1965 | static void | |
e73aec82 | 1966 | sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer) |
ea73a9f2 | 1967 | { |
1da177e4 | 1968 | int res; |
ea73a9f2 | 1969 | struct scsi_device *sdp = sdkp->device; |
1da177e4 | 1970 | struct scsi_mode_data data; |
70a9b873 | 1971 | int old_wp = sdkp->write_prot; |
1da177e4 LT |
1972 | |
1973 | set_disk_ro(sdkp->disk, 0); | |
ea73a9f2 | 1974 | if (sdp->skip_ms_page_3f) { |
e73aec82 | 1975 | sd_printk(KERN_NOTICE, sdkp, "Assuming Write Enabled\n"); |
1da177e4 LT |
1976 | return; |
1977 | } | |
1978 | ||
ea73a9f2 JB |
1979 | if (sdp->use_192_bytes_for_3f) { |
1980 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 192, &data, NULL); | |
1da177e4 LT |
1981 | } else { |
1982 | /* | |
1983 | * First attempt: ask for all pages (0x3F), but only 4 bytes. | |
1984 | * We have to start carefully: some devices hang if we ask | |
1985 | * for more than is available. | |
1986 | */ | |
ea73a9f2 | 1987 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 4, &data, NULL); |
1da177e4 LT |
1988 | |
1989 | /* | |
1990 | * Second attempt: ask for page 0 When only page 0 is | |
1991 | * implemented, a request for page 3F may return Sense Key | |
1992 | * 5: Illegal Request, Sense Code 24: Invalid field in | |
1993 | * CDB. | |
1994 | */ | |
1995 | if (!scsi_status_is_good(res)) | |
ea73a9f2 | 1996 | res = sd_do_mode_sense(sdp, 0, 0, buffer, 4, &data, NULL); |
1da177e4 LT |
1997 | |
1998 | /* | |
1999 | * Third attempt: ask 255 bytes, as we did earlier. | |
2000 | */ | |
2001 | if (!scsi_status_is_good(res)) | |
ea73a9f2 JB |
2002 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 255, |
2003 | &data, NULL); | |
1da177e4 LT |
2004 | } |
2005 | ||
2006 | if (!scsi_status_is_good(res)) { | |
e73aec82 MP |
2007 | sd_printk(KERN_WARNING, sdkp, |
2008 | "Test WP failed, assume Write Enabled\n"); | |
1da177e4 LT |
2009 | } else { |
2010 | sdkp->write_prot = ((data.device_specific & 0x80) != 0); | |
2011 | set_disk_ro(sdkp->disk, sdkp->write_prot); | |
70a9b873 MP |
2012 | if (sdkp->first_scan || old_wp != sdkp->write_prot) { |
2013 | sd_printk(KERN_NOTICE, sdkp, "Write Protect is %s\n", | |
2014 | sdkp->write_prot ? "on" : "off"); | |
2015 | sd_printk(KERN_DEBUG, sdkp, | |
2016 | "Mode Sense: %02x %02x %02x %02x\n", | |
2017 | buffer[0], buffer[1], buffer[2], buffer[3]); | |
2018 | } | |
1da177e4 LT |
2019 | } |
2020 | } | |
2021 | ||
2022 | /* | |
2023 | * sd_read_cache_type - called only from sd_revalidate_disk() | |
48970800 | 2024 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
2025 | */ |
2026 | static void | |
e73aec82 | 2027 | sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer) |
631e8a13 | 2028 | { |
1da177e4 | 2029 | int len = 0, res; |
ea73a9f2 | 2030 | struct scsi_device *sdp = sdkp->device; |
1da177e4 | 2031 | |
631e8a13 AV |
2032 | int dbd; |
2033 | int modepage; | |
0bcaa111 | 2034 | int first_len; |
1da177e4 LT |
2035 | struct scsi_mode_data data; |
2036 | struct scsi_sense_hdr sshdr; | |
70a9b873 MP |
2037 | int old_wce = sdkp->WCE; |
2038 | int old_rcd = sdkp->RCD; | |
2039 | int old_dpofua = sdkp->DPOFUA; | |
1da177e4 | 2040 | |
0bcaa111 LT |
2041 | first_len = 4; |
2042 | if (sdp->skip_ms_page_8) { | |
2043 | if (sdp->type == TYPE_RBC) | |
2044 | goto defaults; | |
2045 | else { | |
2046 | if (sdp->skip_ms_page_3f) | |
2047 | goto defaults; | |
2048 | modepage = 0x3F; | |
2049 | if (sdp->use_192_bytes_for_3f) | |
2050 | first_len = 192; | |
2051 | dbd = 0; | |
2052 | } | |
2053 | } else if (sdp->type == TYPE_RBC) { | |
631e8a13 AV |
2054 | modepage = 6; |
2055 | dbd = 8; | |
2056 | } else { | |
2057 | modepage = 8; | |
2058 | dbd = 0; | |
2059 | } | |
2060 | ||
1da177e4 | 2061 | /* cautiously ask */ |
0bcaa111 LT |
2062 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, first_len, |
2063 | &data, &sshdr); | |
1da177e4 LT |
2064 | |
2065 | if (!scsi_status_is_good(res)) | |
2066 | goto bad_sense; | |
2067 | ||
6d73c851 AV |
2068 | if (!data.header_length) { |
2069 | modepage = 6; | |
0bcaa111 | 2070 | first_len = 0; |
e73aec82 | 2071 | sd_printk(KERN_ERR, sdkp, "Missing header in MODE_SENSE response\n"); |
6d73c851 AV |
2072 | } |
2073 | ||
1da177e4 LT |
2074 | /* that went OK, now ask for the proper length */ |
2075 | len = data.length; | |
2076 | ||
2077 | /* | |
2078 | * We're only interested in the first three bytes, actually. | |
2079 | * But the data cache page is defined for the first 20. | |
2080 | */ | |
2081 | if (len < 3) | |
2082 | goto bad_sense; | |
0bcaa111 LT |
2083 | else if (len > SD_BUF_SIZE) { |
2084 | sd_printk(KERN_NOTICE, sdkp, "Truncating mode parameter " | |
2085 | "data from %d to %d bytes\n", len, SD_BUF_SIZE); | |
2086 | len = SD_BUF_SIZE; | |
2087 | } | |
2088 | if (modepage == 0x3F && sdp->use_192_bytes_for_3f) | |
2089 | len = 192; | |
1da177e4 LT |
2090 | |
2091 | /* Get the data */ | |
0bcaa111 LT |
2092 | if (len > first_len) |
2093 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, len, | |
2094 | &data, &sshdr); | |
1da177e4 LT |
2095 | |
2096 | if (scsi_status_is_good(res)) { | |
631e8a13 | 2097 | int offset = data.header_length + data.block_descriptor_length; |
1da177e4 | 2098 | |
0bcaa111 LT |
2099 | while (offset < len) { |
2100 | u8 page_code = buffer[offset] & 0x3F; | |
2101 | u8 spf = buffer[offset] & 0x40; | |
2102 | ||
2103 | if (page_code == 8 || page_code == 6) { | |
2104 | /* We're interested only in the first 3 bytes. | |
2105 | */ | |
2106 | if (len - offset <= 2) { | |
2107 | sd_printk(KERN_ERR, sdkp, "Incomplete " | |
2108 | "mode parameter data\n"); | |
2109 | goto defaults; | |
2110 | } else { | |
2111 | modepage = page_code; | |
2112 | goto Page_found; | |
2113 | } | |
2114 | } else { | |
2115 | /* Go to the next page */ | |
2116 | if (spf && len - offset > 3) | |
2117 | offset += 4 + (buffer[offset+2] << 8) + | |
2118 | buffer[offset+3]; | |
2119 | else if (!spf && len - offset > 1) | |
2120 | offset += 2 + buffer[offset+1]; | |
2121 | else { | |
2122 | sd_printk(KERN_ERR, sdkp, "Incomplete " | |
2123 | "mode parameter data\n"); | |
2124 | goto defaults; | |
2125 | } | |
2126 | } | |
48970800 AV |
2127 | } |
2128 | ||
0bcaa111 LT |
2129 | if (modepage == 0x3F) { |
2130 | sd_printk(KERN_ERR, sdkp, "No Caching mode page " | |
2131 | "present\n"); | |
2132 | goto defaults; | |
2133 | } else if ((buffer[offset] & 0x3f) != modepage) { | |
e73aec82 | 2134 | sd_printk(KERN_ERR, sdkp, "Got wrong page\n"); |
631e8a13 AV |
2135 | goto defaults; |
2136 | } | |
0bcaa111 | 2137 | Page_found: |
631e8a13 AV |
2138 | if (modepage == 8) { |
2139 | sdkp->WCE = ((buffer[offset + 2] & 0x04) != 0); | |
2140 | sdkp->RCD = ((buffer[offset + 2] & 0x01) != 0); | |
2141 | } else { | |
2142 | sdkp->WCE = ((buffer[offset + 2] & 0x01) == 0); | |
2143 | sdkp->RCD = 0; | |
2144 | } | |
1da177e4 | 2145 | |
007365ad TH |
2146 | sdkp->DPOFUA = (data.device_specific & 0x10) != 0; |
2147 | if (sdkp->DPOFUA && !sdkp->device->use_10_for_rw) { | |
e73aec82 MP |
2148 | sd_printk(KERN_NOTICE, sdkp, |
2149 | "Uses READ/WRITE(6), disabling FUA\n"); | |
007365ad TH |
2150 | sdkp->DPOFUA = 0; |
2151 | } | |
2152 | ||
70a9b873 MP |
2153 | if (sdkp->first_scan || old_wce != sdkp->WCE || |
2154 | old_rcd != sdkp->RCD || old_dpofua != sdkp->DPOFUA) | |
2155 | sd_printk(KERN_NOTICE, sdkp, | |
2156 | "Write cache: %s, read cache: %s, %s\n", | |
2157 | sdkp->WCE ? "enabled" : "disabled", | |
2158 | sdkp->RCD ? "disabled" : "enabled", | |
2159 | sdkp->DPOFUA ? "supports DPO and FUA" | |
2160 | : "doesn't support DPO or FUA"); | |
1da177e4 LT |
2161 | |
2162 | return; | |
2163 | } | |
2164 | ||
2165 | bad_sense: | |
ea73a9f2 | 2166 | if (scsi_sense_valid(&sshdr) && |
1da177e4 LT |
2167 | sshdr.sense_key == ILLEGAL_REQUEST && |
2168 | sshdr.asc == 0x24 && sshdr.ascq == 0x0) | |
e73aec82 MP |
2169 | /* Invalid field in CDB */ |
2170 | sd_printk(KERN_NOTICE, sdkp, "Cache data unavailable\n"); | |
1da177e4 | 2171 | else |
e73aec82 | 2172 | sd_printk(KERN_ERR, sdkp, "Asking for cache data failed\n"); |
1da177e4 LT |
2173 | |
2174 | defaults: | |
e73aec82 | 2175 | sd_printk(KERN_ERR, sdkp, "Assuming drive cache: write through\n"); |
1da177e4 LT |
2176 | sdkp->WCE = 0; |
2177 | sdkp->RCD = 0; | |
48970800 | 2178 | sdkp->DPOFUA = 0; |
1da177e4 LT |
2179 | } |
2180 | ||
e0597d70 MP |
2181 | /* |
2182 | * The ATO bit indicates whether the DIF application tag is available | |
2183 | * for use by the operating system. | |
2184 | */ | |
439d77f7 | 2185 | static void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer) |
e0597d70 MP |
2186 | { |
2187 | int res, offset; | |
2188 | struct scsi_device *sdp = sdkp->device; | |
2189 | struct scsi_mode_data data; | |
2190 | struct scsi_sense_hdr sshdr; | |
2191 | ||
2192 | if (sdp->type != TYPE_DISK) | |
2193 | return; | |
2194 | ||
2195 | if (sdkp->protection_type == 0) | |
2196 | return; | |
2197 | ||
2198 | res = scsi_mode_sense(sdp, 1, 0x0a, buffer, 36, SD_TIMEOUT, | |
2199 | SD_MAX_RETRIES, &data, &sshdr); | |
2200 | ||
2201 | if (!scsi_status_is_good(res) || !data.header_length || | |
2202 | data.length < 6) { | |
2203 | sd_printk(KERN_WARNING, sdkp, | |
2204 | "getting Control mode page failed, assume no ATO\n"); | |
2205 | ||
2206 | if (scsi_sense_valid(&sshdr)) | |
2207 | sd_print_sense_hdr(sdkp, &sshdr); | |
2208 | ||
2209 | return; | |
2210 | } | |
2211 | ||
2212 | offset = data.header_length + data.block_descriptor_length; | |
2213 | ||
2214 | if ((buffer[offset] & 0x3f) != 0x0a) { | |
2215 | sd_printk(KERN_ERR, sdkp, "ATO Got wrong page\n"); | |
2216 | return; | |
2217 | } | |
2218 | ||
2219 | if ((buffer[offset + 5] & 0x80) == 0) | |
2220 | return; | |
2221 | ||
2222 | sdkp->ATO = 1; | |
2223 | ||
2224 | return; | |
2225 | } | |
2226 | ||
d11b6916 MP |
2227 | /** |
2228 | * sd_read_block_limits - Query disk device for preferred I/O sizes. | |
2229 | * @disk: disk to query | |
2230 | */ | |
2231 | static void sd_read_block_limits(struct scsi_disk *sdkp) | |
2232 | { | |
2233 | unsigned int sector_sz = sdkp->device->sector_size; | |
bb2d3de1 | 2234 | const int vpd_len = 64; |
e3deec09 | 2235 | unsigned char *buffer = kmalloc(vpd_len, GFP_KERNEL); |
d11b6916 | 2236 | |
e3deec09 JB |
2237 | if (!buffer || |
2238 | /* Block Limits VPD */ | |
2239 | scsi_get_vpd_page(sdkp->device, 0xb0, buffer, vpd_len)) | |
2240 | goto out; | |
d11b6916 MP |
2241 | |
2242 | blk_queue_io_min(sdkp->disk->queue, | |
2243 | get_unaligned_be16(&buffer[6]) * sector_sz); | |
2244 | blk_queue_io_opt(sdkp->disk->queue, | |
2245 | get_unaligned_be32(&buffer[12]) * sector_sz); | |
2246 | ||
c98a0eb0 MP |
2247 | if (buffer[3] == 0x3c) { |
2248 | unsigned int lba_count, desc_count; | |
e339c1a7 | 2249 | |
c98a0eb0 MP |
2250 | sdkp->max_ws_blocks = |
2251 | (u32) min_not_zero(get_unaligned_be64(&buffer[36]), | |
2252 | (u64)0xffffffff); | |
e339c1a7 | 2253 | |
c98a0eb0 | 2254 | if (!sdkp->lbpme) |
045d3fe7 | 2255 | goto out; |
045d3fe7 | 2256 | |
c98a0eb0 MP |
2257 | lba_count = get_unaligned_be32(&buffer[20]); |
2258 | desc_count = get_unaligned_be32(&buffer[24]); | |
045d3fe7 | 2259 | |
c98a0eb0 MP |
2260 | if (lba_count && desc_count) |
2261 | sdkp->max_unmap_blocks = lba_count; | |
e339c1a7 | 2262 | |
c98a0eb0 | 2263 | sdkp->unmap_granularity = get_unaligned_be32(&buffer[28]); |
e339c1a7 MP |
2264 | |
2265 | if (buffer[32] & 0x80) | |
c98a0eb0 | 2266 | sdkp->unmap_alignment = |
e339c1a7 | 2267 | get_unaligned_be32(&buffer[32]) & ~(1 << 31); |
c98a0eb0 MP |
2268 | |
2269 | if (!sdkp->lbpvpd) { /* LBP VPD page not provided */ | |
2270 | ||
2271 | if (sdkp->max_unmap_blocks) | |
2272 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
2273 | else | |
2274 | sd_config_discard(sdkp, SD_LBP_WS16); | |
2275 | ||
2276 | } else { /* LBP VPD page tells us what to use */ | |
2277 | ||
2278 | if (sdkp->lbpu && sdkp->max_unmap_blocks) | |
2279 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
2280 | else if (sdkp->lbpws) | |
2281 | sd_config_discard(sdkp, SD_LBP_WS16); | |
2282 | else if (sdkp->lbpws10) | |
2283 | sd_config_discard(sdkp, SD_LBP_WS10); | |
2284 | else | |
2285 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
2286 | } | |
e339c1a7 MP |
2287 | } |
2288 | ||
e3deec09 | 2289 | out: |
d11b6916 MP |
2290 | kfree(buffer); |
2291 | } | |
2292 | ||
3821d768 MP |
2293 | /** |
2294 | * sd_read_block_characteristics - Query block dev. characteristics | |
2295 | * @disk: disk to query | |
2296 | */ | |
2297 | static void sd_read_block_characteristics(struct scsi_disk *sdkp) | |
2298 | { | |
e3deec09 | 2299 | unsigned char *buffer; |
3821d768 | 2300 | u16 rot; |
bb2d3de1 | 2301 | const int vpd_len = 64; |
3821d768 | 2302 | |
e3deec09 | 2303 | buffer = kmalloc(vpd_len, GFP_KERNEL); |
3821d768 | 2304 | |
e3deec09 JB |
2305 | if (!buffer || |
2306 | /* Block Device Characteristics VPD */ | |
2307 | scsi_get_vpd_page(sdkp->device, 0xb1, buffer, vpd_len)) | |
2308 | goto out; | |
3821d768 MP |
2309 | |
2310 | rot = get_unaligned_be16(&buffer[4]); | |
2311 | ||
2312 | if (rot == 1) | |
2313 | queue_flag_set_unlocked(QUEUE_FLAG_NONROT, sdkp->disk->queue); | |
2314 | ||
e3deec09 | 2315 | out: |
3821d768 MP |
2316 | kfree(buffer); |
2317 | } | |
2318 | ||
045d3fe7 | 2319 | /** |
c98a0eb0 | 2320 | * sd_read_block_provisioning - Query provisioning VPD page |
045d3fe7 MP |
2321 | * @disk: disk to query |
2322 | */ | |
c98a0eb0 | 2323 | static void sd_read_block_provisioning(struct scsi_disk *sdkp) |
045d3fe7 MP |
2324 | { |
2325 | unsigned char *buffer; | |
2326 | const int vpd_len = 8; | |
2327 | ||
c98a0eb0 | 2328 | if (sdkp->lbpme == 0) |
045d3fe7 MP |
2329 | return; |
2330 | ||
2331 | buffer = kmalloc(vpd_len, GFP_KERNEL); | |
2332 | ||
2333 | if (!buffer || scsi_get_vpd_page(sdkp->device, 0xb2, buffer, vpd_len)) | |
2334 | goto out; | |
2335 | ||
c98a0eb0 MP |
2336 | sdkp->lbpvpd = 1; |
2337 | sdkp->lbpu = (buffer[5] >> 7) & 1; /* UNMAP */ | |
2338 | sdkp->lbpws = (buffer[5] >> 6) & 1; /* WRITE SAME(16) with UNMAP */ | |
2339 | sdkp->lbpws10 = (buffer[5] >> 5) & 1; /* WRITE SAME(10) with UNMAP */ | |
045d3fe7 MP |
2340 | |
2341 | out: | |
2342 | kfree(buffer); | |
2343 | } | |
2344 | ||
ffd4bc2a MP |
2345 | static int sd_try_extended_inquiry(struct scsi_device *sdp) |
2346 | { | |
2347 | /* | |
2348 | * Although VPD inquiries can go to SCSI-2 type devices, | |
2349 | * some USB ones crash on receiving them, and the pages | |
2350 | * we currently ask for are for SPC-3 and beyond | |
2351 | */ | |
2352 | if (sdp->scsi_level > SCSI_SPC_2) | |
2353 | return 1; | |
2354 | return 0; | |
2355 | } | |
2356 | ||
1da177e4 LT |
2357 | /** |
2358 | * sd_revalidate_disk - called the first time a new disk is seen, | |
2359 | * performs disk spin up, read_capacity, etc. | |
2360 | * @disk: struct gendisk we care about | |
2361 | **/ | |
2362 | static int sd_revalidate_disk(struct gendisk *disk) | |
2363 | { | |
2364 | struct scsi_disk *sdkp = scsi_disk(disk); | |
2365 | struct scsi_device *sdp = sdkp->device; | |
1da177e4 | 2366 | unsigned char *buffer; |
4913efe4 | 2367 | unsigned flush = 0; |
1da177e4 | 2368 | |
fa0d34be MP |
2369 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, |
2370 | "sd_revalidate_disk\n")); | |
1da177e4 LT |
2371 | |
2372 | /* | |
2373 | * If the device is offline, don't try and read capacity or any | |
2374 | * of the other niceties. | |
2375 | */ | |
2376 | if (!scsi_device_online(sdp)) | |
2377 | goto out; | |
2378 | ||
a6123f14 | 2379 | buffer = kmalloc(SD_BUF_SIZE, GFP_KERNEL); |
1da177e4 | 2380 | if (!buffer) { |
e73aec82 MP |
2381 | sd_printk(KERN_WARNING, sdkp, "sd_revalidate_disk: Memory " |
2382 | "allocation failure.\n"); | |
ea73a9f2 | 2383 | goto out; |
1da177e4 LT |
2384 | } |
2385 | ||
e73aec82 | 2386 | sd_spinup_disk(sdkp); |
1da177e4 LT |
2387 | |
2388 | /* | |
2389 | * Without media there is no reason to ask; moreover, some devices | |
2390 | * react badly if we do. | |
2391 | */ | |
2392 | if (sdkp->media_present) { | |
e73aec82 | 2393 | sd_read_capacity(sdkp, buffer); |
ffd4bc2a MP |
2394 | |
2395 | if (sd_try_extended_inquiry(sdp)) { | |
c98a0eb0 | 2396 | sd_read_block_provisioning(sdkp); |
ffd4bc2a MP |
2397 | sd_read_block_limits(sdkp); |
2398 | sd_read_block_characteristics(sdkp); | |
2399 | } | |
2400 | ||
e73aec82 MP |
2401 | sd_read_write_protect_flag(sdkp, buffer); |
2402 | sd_read_cache_type(sdkp, buffer); | |
e0597d70 | 2403 | sd_read_app_tag_own(sdkp, buffer); |
1da177e4 | 2404 | } |
461d4e90 | 2405 | |
70a9b873 MP |
2406 | sdkp->first_scan = 0; |
2407 | ||
461d4e90 TH |
2408 | /* |
2409 | * We now have all cache related info, determine how we deal | |
4913efe4 | 2410 | * with flush requests. |
461d4e90 | 2411 | */ |
4913efe4 TH |
2412 | if (sdkp->WCE) { |
2413 | flush |= REQ_FLUSH; | |
2414 | if (sdkp->DPOFUA) | |
2415 | flush |= REQ_FUA; | |
2416 | } | |
461d4e90 | 2417 | |
4913efe4 | 2418 | blk_queue_flush(sdkp->disk->queue, flush); |
461d4e90 | 2419 | |
1da177e4 LT |
2420 | set_capacity(disk, sdkp->capacity); |
2421 | kfree(buffer); | |
2422 | ||
1da177e4 LT |
2423 | out: |
2424 | return 0; | |
2425 | } | |
2426 | ||
72ec24bd TH |
2427 | /** |
2428 | * sd_unlock_native_capacity - unlock native capacity | |
2429 | * @disk: struct gendisk to set capacity for | |
2430 | * | |
2431 | * Block layer calls this function if it detects that partitions | |
2432 | * on @disk reach beyond the end of the device. If the SCSI host | |
2433 | * implements ->unlock_native_capacity() method, it's invoked to | |
2434 | * give it a chance to adjust the device capacity. | |
2435 | * | |
2436 | * CONTEXT: | |
2437 | * Defined by block layer. Might sleep. | |
2438 | */ | |
2439 | static void sd_unlock_native_capacity(struct gendisk *disk) | |
2440 | { | |
2441 | struct scsi_device *sdev = scsi_disk(disk)->device; | |
2442 | ||
2443 | if (sdev->host->hostt->unlock_native_capacity) | |
2444 | sdev->host->hostt->unlock_native_capacity(sdev); | |
2445 | } | |
2446 | ||
3e1a7ff8 TH |
2447 | /** |
2448 | * sd_format_disk_name - format disk name | |
2449 | * @prefix: name prefix - ie. "sd" for SCSI disks | |
2450 | * @index: index of the disk to format name for | |
2451 | * @buf: output buffer | |
2452 | * @buflen: length of the output buffer | |
2453 | * | |
2454 | * SCSI disk names starts at sda. The 26th device is sdz and the | |
2455 | * 27th is sdaa. The last one for two lettered suffix is sdzz | |
2456 | * which is followed by sdaaa. | |
2457 | * | |
2458 | * This is basically 26 base counting with one extra 'nil' entry | |
3ad2f3fb | 2459 | * at the beginning from the second digit on and can be |
3e1a7ff8 TH |
2460 | * determined using similar method as 26 base conversion with the |
2461 | * index shifted -1 after each digit is computed. | |
2462 | * | |
2463 | * CONTEXT: | |
2464 | * Don't care. | |
2465 | * | |
2466 | * RETURNS: | |
2467 | * 0 on success, -errno on failure. | |
2468 | */ | |
2469 | static int sd_format_disk_name(char *prefix, int index, char *buf, int buflen) | |
2470 | { | |
2471 | const int base = 'z' - 'a' + 1; | |
2472 | char *begin = buf + strlen(prefix); | |
2473 | char *end = buf + buflen; | |
2474 | char *p; | |
2475 | int unit; | |
2476 | ||
2477 | p = end - 1; | |
2478 | *p = '\0'; | |
2479 | unit = base; | |
2480 | do { | |
2481 | if (p == begin) | |
2482 | return -EINVAL; | |
2483 | *--p = 'a' + (index % unit); | |
2484 | index = (index / unit) - 1; | |
2485 | } while (index >= 0); | |
2486 | ||
2487 | memmove(begin, p, end - p); | |
2488 | memcpy(buf, prefix, strlen(prefix)); | |
2489 | ||
2490 | return 0; | |
2491 | } | |
2492 | ||
4ace92fc AV |
2493 | /* |
2494 | * The asynchronous part of sd_probe | |
2495 | */ | |
2496 | static void sd_probe_async(void *data, async_cookie_t cookie) | |
2497 | { | |
2498 | struct scsi_disk *sdkp = data; | |
2499 | struct scsi_device *sdp; | |
2500 | struct gendisk *gd; | |
2501 | u32 index; | |
2502 | struct device *dev; | |
2503 | ||
2504 | sdp = sdkp->device; | |
2505 | gd = sdkp->disk; | |
2506 | index = sdkp->index; | |
2507 | dev = &sdp->sdev_gendev; | |
2508 | ||
1a03ae0f MR |
2509 | gd->major = sd_major((index & 0xf0) >> 4); |
2510 | gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00); | |
2511 | gd->minors = SD_MINORS; | |
2512 | ||
4ace92fc AV |
2513 | gd->fops = &sd_fops; |
2514 | gd->private_data = &sdkp->driver; | |
2515 | gd->queue = sdkp->device->request_queue; | |
2516 | ||
70a9b873 MP |
2517 | /* defaults, until the device tells us otherwise */ |
2518 | sdp->sector_size = 512; | |
2519 | sdkp->capacity = 0; | |
2520 | sdkp->media_present = 1; | |
2521 | sdkp->write_prot = 0; | |
2522 | sdkp->WCE = 0; | |
2523 | sdkp->RCD = 0; | |
2524 | sdkp->ATO = 0; | |
2525 | sdkp->first_scan = 1; | |
2526 | ||
4ace92fc AV |
2527 | sd_revalidate_disk(gd); |
2528 | ||
2529 | blk_queue_prep_rq(sdp->request_queue, sd_prep_fn); | |
f1126e95 | 2530 | blk_queue_unprep_rq(sdp->request_queue, sd_unprep_fn); |
4ace92fc AV |
2531 | |
2532 | gd->driverfs_dev = &sdp->sdev_gendev; | |
97fedbbe | 2533 | gd->flags = GENHD_FL_EXT_DEVT; |
2bae0093 | 2534 | if (sdp->removable) { |
4ace92fc | 2535 | gd->flags |= GENHD_FL_REMOVABLE; |
2bae0093 TH |
2536 | gd->events |= DISK_EVENT_MEDIA_CHANGE; |
2537 | } | |
4ace92fc | 2538 | |
4ace92fc AV |
2539 | add_disk(gd); |
2540 | sd_dif_config_host(sdkp); | |
2541 | ||
3821d768 MP |
2542 | sd_revalidate_disk(gd); |
2543 | ||
4ace92fc AV |
2544 | sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n", |
2545 | sdp->removable ? "removable " : ""); | |
478a8a05 | 2546 | scsi_autopm_put_device(sdp); |
ea038f63 | 2547 | put_device(&sdkp->dev); |
4ace92fc AV |
2548 | } |
2549 | ||
1da177e4 LT |
2550 | /** |
2551 | * sd_probe - called during driver initialization and whenever a | |
2552 | * new scsi device is attached to the system. It is called once | |
2553 | * for each scsi device (not just disks) present. | |
2554 | * @dev: pointer to device object | |
2555 | * | |
2556 | * Returns 0 if successful (or not interested in this scsi device | |
2557 | * (e.g. scanner)); 1 when there is an error. | |
2558 | * | |
2559 | * Note: this function is invoked from the scsi mid-level. | |
2560 | * This function sets up the mapping between a given | |
2561 | * <host,channel,id,lun> (found in sdp) and new device name | |
2562 | * (e.g. /dev/sda). More precisely it is the block device major | |
2563 | * and minor number that is chosen here. | |
2564 | * | |
2565 | * Assume sd_attach is not re-entrant (for time being) | |
2566 | * Also think about sd_attach() and sd_remove() running coincidentally. | |
2567 | **/ | |
2568 | static int sd_probe(struct device *dev) | |
2569 | { | |
2570 | struct scsi_device *sdp = to_scsi_device(dev); | |
2571 | struct scsi_disk *sdkp; | |
2572 | struct gendisk *gd; | |
439d77f7 | 2573 | int index; |
1da177e4 LT |
2574 | int error; |
2575 | ||
2576 | error = -ENODEV; | |
631e8a13 | 2577 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_MOD && sdp->type != TYPE_RBC) |
1da177e4 LT |
2578 | goto out; |
2579 | ||
9ccfc756 JB |
2580 | SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO, sdp, |
2581 | "sd_attach\n")); | |
1da177e4 LT |
2582 | |
2583 | error = -ENOMEM; | |
24669f75 | 2584 | sdkp = kzalloc(sizeof(*sdkp), GFP_KERNEL); |
1da177e4 LT |
2585 | if (!sdkp) |
2586 | goto out; | |
2587 | ||
689d6fac | 2588 | gd = alloc_disk(SD_MINORS); |
1da177e4 LT |
2589 | if (!gd) |
2590 | goto out_free; | |
2591 | ||
f27bac27 TH |
2592 | do { |
2593 | if (!ida_pre_get(&sd_index_ida, GFP_KERNEL)) | |
2594 | goto out_put; | |
1da177e4 | 2595 | |
4034cc68 | 2596 | spin_lock(&sd_index_lock); |
f27bac27 | 2597 | error = ida_get_new(&sd_index_ida, &index); |
4034cc68 | 2598 | spin_unlock(&sd_index_lock); |
f27bac27 | 2599 | } while (error == -EAGAIN); |
1da177e4 | 2600 | |
21208ae5 DK |
2601 | if (error) { |
2602 | sdev_printk(KERN_WARNING, sdp, "sd_probe: memory exhausted.\n"); | |
1da177e4 | 2603 | goto out_put; |
1a03ae0f MR |
2604 | } |
2605 | ||
3e1a7ff8 | 2606 | error = sd_format_disk_name("sd", index, gd->disk_name, DISK_NAME_LEN); |
21208ae5 DK |
2607 | if (error) { |
2608 | sdev_printk(KERN_WARNING, sdp, "SCSI disk (sd) name length exceeded.\n"); | |
f27bac27 | 2609 | goto out_free_index; |
21208ae5 | 2610 | } |
f27bac27 | 2611 | |
1da177e4 LT |
2612 | sdkp->device = sdp; |
2613 | sdkp->driver = &sd_template; | |
2614 | sdkp->disk = gd; | |
2615 | sdkp->index = index; | |
409f3499 | 2616 | atomic_set(&sdkp->openers, 0); |
1da177e4 | 2617 | |
601e7638 JB |
2618 | if (!sdp->request_queue->rq_timeout) { |
2619 | if (sdp->type != TYPE_MOD) | |
2620 | blk_queue_rq_timeout(sdp->request_queue, SD_TIMEOUT); | |
2621 | else | |
2622 | blk_queue_rq_timeout(sdp->request_queue, | |
2623 | SD_MOD_TIMEOUT); | |
2624 | } | |
2625 | ||
2626 | device_initialize(&sdkp->dev); | |
478a8a05 | 2627 | sdkp->dev.parent = dev; |
601e7638 | 2628 | sdkp->dev.class = &sd_disk_class; |
478a8a05 | 2629 | dev_set_name(&sdkp->dev, dev_name(dev)); |
601e7638 JB |
2630 | |
2631 | if (device_add(&sdkp->dev)) | |
2632 | goto out_free_index; | |
2633 | ||
478a8a05 AS |
2634 | get_device(dev); |
2635 | dev_set_drvdata(dev, sdkp); | |
601e7638 | 2636 | |
ea038f63 | 2637 | get_device(&sdkp->dev); /* prevent release before async_schedule */ |
4ace92fc | 2638 | async_schedule(sd_probe_async, sdkp); |
1da177e4 LT |
2639 | |
2640 | return 0; | |
2641 | ||
f27bac27 | 2642 | out_free_index: |
4034cc68 | 2643 | spin_lock(&sd_index_lock); |
f27bac27 | 2644 | ida_remove(&sd_index_ida, index); |
4034cc68 | 2645 | spin_unlock(&sd_index_lock); |
6bdaa1f1 | 2646 | out_put: |
1da177e4 | 2647 | put_disk(gd); |
6bdaa1f1 | 2648 | out_free: |
1da177e4 | 2649 | kfree(sdkp); |
6bdaa1f1 | 2650 | out: |
1da177e4 LT |
2651 | return error; |
2652 | } | |
2653 | ||
2654 | /** | |
2655 | * sd_remove - called whenever a scsi disk (previously recognized by | |
2656 | * sd_probe) is detached from the system. It is called (potentially | |
2657 | * multiple times) during sd module unload. | |
2658 | * @sdp: pointer to mid level scsi device object | |
2659 | * | |
2660 | * Note: this function is invoked from the scsi mid-level. | |
2661 | * This function potentially frees up a device name (e.g. /dev/sdc) | |
2662 | * that could be re-used by a subsequent sd_probe(). | |
2663 | * This function is not called when the built-in sd driver is "exit-ed". | |
2664 | **/ | |
2665 | static int sd_remove(struct device *dev) | |
2666 | { | |
601e7638 | 2667 | struct scsi_disk *sdkp; |
1da177e4 | 2668 | |
601e7638 | 2669 | sdkp = dev_get_drvdata(dev); |
478a8a05 AS |
2670 | scsi_autopm_get_device(sdkp->device); |
2671 | ||
2672 | async_synchronize_full(); | |
b391277a | 2673 | blk_queue_prep_rq(sdkp->device->request_queue, scsi_prep_fn); |
82b6d57f | 2674 | blk_queue_unprep_rq(sdkp->device->request_queue, NULL); |
ee959b00 | 2675 | device_del(&sdkp->dev); |
1da177e4 LT |
2676 | del_gendisk(sdkp->disk); |
2677 | sd_shutdown(dev); | |
39b7f1e2 | 2678 | |
0b950672 | 2679 | mutex_lock(&sd_ref_mutex); |
39b7f1e2 | 2680 | dev_set_drvdata(dev, NULL); |
ee959b00 | 2681 | put_device(&sdkp->dev); |
0b950672 | 2682 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
2683 | |
2684 | return 0; | |
2685 | } | |
2686 | ||
2687 | /** | |
2688 | * scsi_disk_release - Called to free the scsi_disk structure | |
ee959b00 | 2689 | * @dev: pointer to embedded class device |
1da177e4 | 2690 | * |
0b950672 | 2691 | * sd_ref_mutex must be held entering this routine. Because it is |
1da177e4 LT |
2692 | * called on last put, you should always use the scsi_disk_get() |
2693 | * scsi_disk_put() helpers which manipulate the semaphore directly | |
ee959b00 | 2694 | * and never do a direct put_device. |
1da177e4 | 2695 | **/ |
ee959b00 | 2696 | static void scsi_disk_release(struct device *dev) |
1da177e4 | 2697 | { |
ee959b00 | 2698 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
1da177e4 LT |
2699 | struct gendisk *disk = sdkp->disk; |
2700 | ||
4034cc68 | 2701 | spin_lock(&sd_index_lock); |
f27bac27 | 2702 | ida_remove(&sd_index_ida, sdkp->index); |
4034cc68 | 2703 | spin_unlock(&sd_index_lock); |
1da177e4 LT |
2704 | |
2705 | disk->private_data = NULL; | |
1da177e4 | 2706 | put_disk(disk); |
39b7f1e2 | 2707 | put_device(&sdkp->device->sdev_gendev); |
1da177e4 LT |
2708 | |
2709 | kfree(sdkp); | |
2710 | } | |
2711 | ||
cc5d2c8c | 2712 | static int sd_start_stop_device(struct scsi_disk *sdkp, int start) |
c3c94c5a TH |
2713 | { |
2714 | unsigned char cmd[6] = { START_STOP }; /* START_VALID */ | |
2715 | struct scsi_sense_hdr sshdr; | |
cc5d2c8c | 2716 | struct scsi_device *sdp = sdkp->device; |
c3c94c5a TH |
2717 | int res; |
2718 | ||
2719 | if (start) | |
2720 | cmd[4] |= 1; /* START */ | |
2721 | ||
d2886ea3 SR |
2722 | if (sdp->start_stop_pwr_cond) |
2723 | cmd[4] |= start ? 1 << 4 : 3 << 4; /* Active or Standby */ | |
2724 | ||
c3c94c5a TH |
2725 | if (!scsi_device_online(sdp)) |
2726 | return -ENODEV; | |
2727 | ||
2728 | res = scsi_execute_req(sdp, cmd, DMA_NONE, NULL, 0, &sshdr, | |
f4f4e47e | 2729 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); |
c3c94c5a | 2730 | if (res) { |
cc5d2c8c JB |
2731 | sd_printk(KERN_WARNING, sdkp, "START_STOP FAILED\n"); |
2732 | sd_print_result(sdkp, res); | |
c3c94c5a | 2733 | if (driver_byte(res) & DRIVER_SENSE) |
cc5d2c8c | 2734 | sd_print_sense_hdr(sdkp, &sshdr); |
c3c94c5a TH |
2735 | } |
2736 | ||
2737 | return res; | |
2738 | } | |
2739 | ||
1da177e4 LT |
2740 | /* |
2741 | * Send a SYNCHRONIZE CACHE instruction down to the device through | |
2742 | * the normal SCSI command structure. Wait for the command to | |
2743 | * complete. | |
2744 | */ | |
2745 | static void sd_shutdown(struct device *dev) | |
2746 | { | |
39b7f1e2 | 2747 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
1da177e4 LT |
2748 | |
2749 | if (!sdkp) | |
2750 | return; /* this can happen */ | |
2751 | ||
54f57588 LM |
2752 | if (pm_runtime_suspended(dev)) |
2753 | goto exit; | |
2754 | ||
39b7f1e2 | 2755 | if (sdkp->WCE) { |
e73aec82 MP |
2756 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
2757 | sd_sync_cache(sdkp); | |
39b7f1e2 | 2758 | } |
c3c94c5a | 2759 | |
cc5d2c8c JB |
2760 | if (system_state != SYSTEM_RESTART && sdkp->device->manage_start_stop) { |
2761 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); | |
2762 | sd_start_stop_device(sdkp, 0); | |
c3c94c5a TH |
2763 | } |
2764 | ||
54f57588 | 2765 | exit: |
39b7f1e2 AS |
2766 | scsi_disk_put(sdkp); |
2767 | } | |
1da177e4 | 2768 | |
c3c94c5a TH |
2769 | static int sd_suspend(struct device *dev, pm_message_t mesg) |
2770 | { | |
c3c94c5a | 2771 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
09ff92fe | 2772 | int ret = 0; |
c3c94c5a TH |
2773 | |
2774 | if (!sdkp) | |
2775 | return 0; /* this can happen */ | |
2776 | ||
2777 | if (sdkp->WCE) { | |
cc5d2c8c | 2778 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
c3c94c5a TH |
2779 | ret = sd_sync_cache(sdkp); |
2780 | if (ret) | |
09ff92fe | 2781 | goto done; |
c3c94c5a TH |
2782 | } |
2783 | ||
3a2d5b70 | 2784 | if ((mesg.event & PM_EVENT_SLEEP) && sdkp->device->manage_start_stop) { |
cc5d2c8c JB |
2785 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); |
2786 | ret = sd_start_stop_device(sdkp, 0); | |
c3c94c5a TH |
2787 | } |
2788 | ||
09ff92fe AS |
2789 | done: |
2790 | scsi_disk_put(sdkp); | |
2791 | return ret; | |
c3c94c5a TH |
2792 | } |
2793 | ||
2794 | static int sd_resume(struct device *dev) | |
2795 | { | |
c3c94c5a | 2796 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
09ff92fe | 2797 | int ret = 0; |
c3c94c5a | 2798 | |
cc5d2c8c | 2799 | if (!sdkp->device->manage_start_stop) |
09ff92fe | 2800 | goto done; |
c3c94c5a | 2801 | |
cc5d2c8c | 2802 | sd_printk(KERN_NOTICE, sdkp, "Starting disk\n"); |
09ff92fe | 2803 | ret = sd_start_stop_device(sdkp, 1); |
c3c94c5a | 2804 | |
09ff92fe AS |
2805 | done: |
2806 | scsi_disk_put(sdkp); | |
2807 | return ret; | |
c3c94c5a TH |
2808 | } |
2809 | ||
1da177e4 LT |
2810 | /** |
2811 | * init_sd - entry point for this driver (both when built in or when | |
2812 | * a module). | |
2813 | * | |
2814 | * Note: this function registers this driver with the scsi mid-level. | |
2815 | **/ | |
2816 | static int __init init_sd(void) | |
2817 | { | |
5e4009ba | 2818 | int majors = 0, i, err; |
1da177e4 LT |
2819 | |
2820 | SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n")); | |
2821 | ||
2822 | for (i = 0; i < SD_MAJORS; i++) | |
2823 | if (register_blkdev(sd_major(i), "sd") == 0) | |
2824 | majors++; | |
2825 | ||
2826 | if (!majors) | |
2827 | return -ENODEV; | |
2828 | ||
5e4009ba JG |
2829 | err = class_register(&sd_disk_class); |
2830 | if (err) | |
2831 | goto err_out; | |
6bdaa1f1 | 2832 | |
5e4009ba JG |
2833 | err = scsi_register_driver(&sd_template.gendrv); |
2834 | if (err) | |
2835 | goto err_out_class; | |
2836 | ||
4e7392ec MP |
2837 | sd_cdb_cache = kmem_cache_create("sd_ext_cdb", SD_EXT_CDB_SIZE, |
2838 | 0, 0, NULL); | |
2839 | if (!sd_cdb_cache) { | |
2840 | printk(KERN_ERR "sd: can't init extended cdb cache\n"); | |
2841 | goto err_out_class; | |
2842 | } | |
2843 | ||
2844 | sd_cdb_pool = mempool_create_slab_pool(SD_MEMPOOL_SIZE, sd_cdb_cache); | |
2845 | if (!sd_cdb_pool) { | |
2846 | printk(KERN_ERR "sd: can't init extended cdb pool\n"); | |
2847 | goto err_out_cache; | |
2848 | } | |
2849 | ||
5e4009ba JG |
2850 | return 0; |
2851 | ||
4e7392ec MP |
2852 | err_out_cache: |
2853 | kmem_cache_destroy(sd_cdb_cache); | |
2854 | ||
5e4009ba JG |
2855 | err_out_class: |
2856 | class_unregister(&sd_disk_class); | |
2857 | err_out: | |
2858 | for (i = 0; i < SD_MAJORS; i++) | |
2859 | unregister_blkdev(sd_major(i), "sd"); | |
2860 | return err; | |
1da177e4 LT |
2861 | } |
2862 | ||
2863 | /** | |
2864 | * exit_sd - exit point for this driver (when it is a module). | |
2865 | * | |
2866 | * Note: this function unregisters this driver from the scsi mid-level. | |
2867 | **/ | |
2868 | static void __exit exit_sd(void) | |
2869 | { | |
2870 | int i; | |
2871 | ||
2872 | SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n")); | |
2873 | ||
4e7392ec MP |
2874 | mempool_destroy(sd_cdb_pool); |
2875 | kmem_cache_destroy(sd_cdb_cache); | |
2876 | ||
1da177e4 | 2877 | scsi_unregister_driver(&sd_template.gendrv); |
5e4009ba JG |
2878 | class_unregister(&sd_disk_class); |
2879 | ||
1da177e4 LT |
2880 | for (i = 0; i < SD_MAJORS; i++) |
2881 | unregister_blkdev(sd_major(i), "sd"); | |
2882 | } | |
2883 | ||
1da177e4 LT |
2884 | module_init(init_sd); |
2885 | module_exit(exit_sd); | |
e73aec82 MP |
2886 | |
2887 | static void sd_print_sense_hdr(struct scsi_disk *sdkp, | |
2888 | struct scsi_sense_hdr *sshdr) | |
2889 | { | |
2e4c3329 | 2890 | sd_printk(KERN_INFO, sdkp, " "); |
e73aec82 | 2891 | scsi_show_sense_hdr(sshdr); |
2e4c3329 | 2892 | sd_printk(KERN_INFO, sdkp, " "); |
e73aec82 MP |
2893 | scsi_show_extd_sense(sshdr->asc, sshdr->ascq); |
2894 | } | |
2895 | ||
2896 | static void sd_print_result(struct scsi_disk *sdkp, int result) | |
2897 | { | |
2e4c3329 | 2898 | sd_printk(KERN_INFO, sdkp, " "); |
e73aec82 MP |
2899 | scsi_show_result(result); |
2900 | } | |
2901 |