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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" |
a7a20d10 | 68 | #include "scsi_priv.h" |
1da177e4 LT |
69 | #include "scsi_logging.h" |
70 | ||
f018fa55 RH |
71 | MODULE_AUTHOR("Eric Youngdale"); |
72 | MODULE_DESCRIPTION("SCSI disk (sd) driver"); | |
73 | MODULE_LICENSE("GPL"); | |
74 | ||
75 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK0_MAJOR); | |
76 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK1_MAJOR); | |
77 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK2_MAJOR); | |
78 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK3_MAJOR); | |
79 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK4_MAJOR); | |
80 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK5_MAJOR); | |
81 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK6_MAJOR); | |
82 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK7_MAJOR); | |
83 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK8_MAJOR); | |
84 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK9_MAJOR); | |
85 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK10_MAJOR); | |
86 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK11_MAJOR); | |
87 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK12_MAJOR); | |
88 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK13_MAJOR); | |
89 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK14_MAJOR); | |
90 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK15_MAJOR); | |
d7b8bcb0 MT |
91 | MODULE_ALIAS_SCSI_DEVICE(TYPE_DISK); |
92 | MODULE_ALIAS_SCSI_DEVICE(TYPE_MOD); | |
93 | MODULE_ALIAS_SCSI_DEVICE(TYPE_RBC); | |
f018fa55 | 94 | |
870d6656 | 95 | #if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT) |
f615b48c | 96 | #define SD_MINORS 16 |
870d6656 | 97 | #else |
3e1a7ff8 | 98 | #define SD_MINORS 0 |
870d6656 TH |
99 | #endif |
100 | ||
c98a0eb0 | 101 | static void sd_config_discard(struct scsi_disk *, unsigned int); |
7b3d9545 | 102 | static int sd_revalidate_disk(struct gendisk *); |
72ec24bd | 103 | static void sd_unlock_native_capacity(struct gendisk *disk); |
7b3d9545 LT |
104 | static int sd_probe(struct device *); |
105 | static int sd_remove(struct device *); | |
106 | static void sd_shutdown(struct device *); | |
107 | static int sd_suspend(struct device *, pm_message_t state); | |
108 | static int sd_resume(struct device *); | |
109 | static void sd_rescan(struct device *); | |
110 | static int sd_done(struct scsi_cmnd *); | |
18a4d0a2 | 111 | static int sd_eh_action(struct scsi_cmnd *, unsigned char *, int, int); |
7b3d9545 | 112 | static void sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer); |
ee959b00 | 113 | static void scsi_disk_release(struct device *cdev); |
7b3d9545 LT |
114 | static void sd_print_sense_hdr(struct scsi_disk *, struct scsi_sense_hdr *); |
115 | static void sd_print_result(struct scsi_disk *, int); | |
116 | ||
4034cc68 | 117 | static DEFINE_SPINLOCK(sd_index_lock); |
f27bac27 | 118 | static DEFINE_IDA(sd_index_ida); |
1da177e4 LT |
119 | |
120 | /* This semaphore is used to mediate the 0->1 reference get in the | |
121 | * face of object destruction (i.e. we can't allow a get on an | |
122 | * object after last put) */ | |
0b950672 | 123 | static DEFINE_MUTEX(sd_ref_mutex); |
1da177e4 | 124 | |
439d77f7 HS |
125 | static struct kmem_cache *sd_cdb_cache; |
126 | static mempool_t *sd_cdb_pool; | |
4e7392ec | 127 | |
6bdaa1f1 JB |
128 | static const char *sd_cache_types[] = { |
129 | "write through", "none", "write back", | |
130 | "write back, no read (daft)" | |
131 | }; | |
132 | ||
ee959b00 TJ |
133 | static ssize_t |
134 | sd_store_cache_type(struct device *dev, struct device_attribute *attr, | |
135 | const char *buf, size_t count) | |
6bdaa1f1 JB |
136 | { |
137 | int i, ct = -1, rcd, wce, sp; | |
ee959b00 | 138 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
139 | struct scsi_device *sdp = sdkp->device; |
140 | char buffer[64]; | |
141 | char *buffer_data; | |
142 | struct scsi_mode_data data; | |
143 | struct scsi_sense_hdr sshdr; | |
144 | int len; | |
145 | ||
146 | if (sdp->type != TYPE_DISK) | |
147 | /* no cache control on RBC devices; theoretically they | |
148 | * can do it, but there's probably so many exceptions | |
149 | * it's not worth the risk */ | |
150 | return -EINVAL; | |
151 | ||
6391a113 | 152 | for (i = 0; i < ARRAY_SIZE(sd_cache_types); i++) { |
439d77f7 | 153 | len = strlen(sd_cache_types[i]); |
6bdaa1f1 JB |
154 | if (strncmp(sd_cache_types[i], buf, len) == 0 && |
155 | buf[len] == '\n') { | |
156 | ct = i; | |
157 | break; | |
158 | } | |
159 | } | |
160 | if (ct < 0) | |
161 | return -EINVAL; | |
162 | rcd = ct & 0x01 ? 1 : 0; | |
163 | wce = ct & 0x02 ? 1 : 0; | |
164 | if (scsi_mode_sense(sdp, 0x08, 8, buffer, sizeof(buffer), SD_TIMEOUT, | |
165 | SD_MAX_RETRIES, &data, NULL)) | |
166 | return -EINVAL; | |
a9312fb8 | 167 | len = min_t(size_t, sizeof(buffer), data.length - data.header_length - |
6bdaa1f1 JB |
168 | data.block_descriptor_length); |
169 | buffer_data = buffer + data.header_length + | |
170 | data.block_descriptor_length; | |
171 | buffer_data[2] &= ~0x05; | |
172 | buffer_data[2] |= wce << 2 | rcd; | |
173 | sp = buffer_data[0] & 0x80 ? 1 : 0; | |
174 | ||
175 | if (scsi_mode_select(sdp, 1, sp, 8, buffer_data, len, SD_TIMEOUT, | |
176 | SD_MAX_RETRIES, &data, &sshdr)) { | |
177 | if (scsi_sense_valid(&sshdr)) | |
e73aec82 | 178 | sd_print_sense_hdr(sdkp, &sshdr); |
6bdaa1f1 JB |
179 | return -EINVAL; |
180 | } | |
f98a8cae | 181 | revalidate_disk(sdkp->disk); |
6bdaa1f1 JB |
182 | return count; |
183 | } | |
184 | ||
ee959b00 TJ |
185 | static ssize_t |
186 | sd_store_manage_start_stop(struct device *dev, struct device_attribute *attr, | |
187 | const char *buf, size_t count) | |
c3c94c5a | 188 | { |
ee959b00 | 189 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
c3c94c5a TH |
190 | struct scsi_device *sdp = sdkp->device; |
191 | ||
192 | if (!capable(CAP_SYS_ADMIN)) | |
193 | return -EACCES; | |
194 | ||
195 | sdp->manage_start_stop = simple_strtoul(buf, NULL, 10); | |
196 | ||
197 | return count; | |
198 | } | |
199 | ||
ee959b00 TJ |
200 | static ssize_t |
201 | sd_store_allow_restart(struct device *dev, struct device_attribute *attr, | |
202 | const char *buf, size_t count) | |
a144c5ae | 203 | { |
ee959b00 | 204 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
a144c5ae BK |
205 | struct scsi_device *sdp = sdkp->device; |
206 | ||
207 | if (!capable(CAP_SYS_ADMIN)) | |
208 | return -EACCES; | |
209 | ||
210 | if (sdp->type != TYPE_DISK) | |
211 | return -EINVAL; | |
212 | ||
213 | sdp->allow_restart = simple_strtoul(buf, NULL, 10); | |
214 | ||
215 | return count; | |
216 | } | |
217 | ||
ee959b00 TJ |
218 | static ssize_t |
219 | sd_show_cache_type(struct device *dev, struct device_attribute *attr, | |
220 | char *buf) | |
6bdaa1f1 | 221 | { |
ee959b00 | 222 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
223 | int ct = sdkp->RCD + 2*sdkp->WCE; |
224 | ||
225 | return snprintf(buf, 40, "%s\n", sd_cache_types[ct]); | |
226 | } | |
227 | ||
ee959b00 TJ |
228 | static ssize_t |
229 | sd_show_fua(struct device *dev, struct device_attribute *attr, char *buf) | |
6bdaa1f1 | 230 | { |
ee959b00 | 231 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
232 | |
233 | return snprintf(buf, 20, "%u\n", sdkp->DPOFUA); | |
234 | } | |
235 | ||
ee959b00 TJ |
236 | static ssize_t |
237 | sd_show_manage_start_stop(struct device *dev, struct device_attribute *attr, | |
238 | char *buf) | |
c3c94c5a | 239 | { |
ee959b00 | 240 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
c3c94c5a TH |
241 | struct scsi_device *sdp = sdkp->device; |
242 | ||
243 | return snprintf(buf, 20, "%u\n", sdp->manage_start_stop); | |
244 | } | |
245 | ||
ee959b00 TJ |
246 | static ssize_t |
247 | sd_show_allow_restart(struct device *dev, struct device_attribute *attr, | |
248 | char *buf) | |
a144c5ae | 249 | { |
ee959b00 | 250 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
a144c5ae BK |
251 | |
252 | return snprintf(buf, 40, "%d\n", sdkp->device->allow_restart); | |
253 | } | |
254 | ||
e0597d70 MP |
255 | static ssize_t |
256 | sd_show_protection_type(struct device *dev, struct device_attribute *attr, | |
257 | char *buf) | |
258 | { | |
259 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
260 | ||
261 | return snprintf(buf, 20, "%u\n", sdkp->protection_type); | |
262 | } | |
263 | ||
518fa8e3 MP |
264 | static ssize_t |
265 | sd_show_protection_mode(struct device *dev, struct device_attribute *attr, | |
266 | char *buf) | |
267 | { | |
268 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
269 | struct scsi_device *sdp = sdkp->device; | |
270 | unsigned int dif, dix; | |
271 | ||
272 | dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type); | |
273 | dix = scsi_host_dix_capable(sdp->host, sdkp->protection_type); | |
274 | ||
275 | if (!dix && scsi_host_dix_capable(sdp->host, SD_DIF_TYPE0_PROTECTION)) { | |
276 | dif = 0; | |
277 | dix = 1; | |
278 | } | |
279 | ||
280 | if (!dif && !dix) | |
281 | return snprintf(buf, 20, "none\n"); | |
282 | ||
283 | return snprintf(buf, 20, "%s%u\n", dix ? "dix" : "dif", dif); | |
284 | } | |
285 | ||
e0597d70 MP |
286 | static ssize_t |
287 | sd_show_app_tag_own(struct device *dev, struct device_attribute *attr, | |
288 | char *buf) | |
289 | { | |
290 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
291 | ||
292 | return snprintf(buf, 20, "%u\n", sdkp->ATO); | |
293 | } | |
294 | ||
e339c1a7 MP |
295 | static ssize_t |
296 | sd_show_thin_provisioning(struct device *dev, struct device_attribute *attr, | |
297 | char *buf) | |
298 | { | |
299 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
300 | ||
c98a0eb0 MP |
301 | return snprintf(buf, 20, "%u\n", sdkp->lbpme); |
302 | } | |
303 | ||
304 | static const char *lbp_mode[] = { | |
305 | [SD_LBP_FULL] = "full", | |
306 | [SD_LBP_UNMAP] = "unmap", | |
307 | [SD_LBP_WS16] = "writesame_16", | |
308 | [SD_LBP_WS10] = "writesame_10", | |
309 | [SD_LBP_ZERO] = "writesame_zero", | |
310 | [SD_LBP_DISABLE] = "disabled", | |
311 | }; | |
312 | ||
313 | static ssize_t | |
314 | sd_show_provisioning_mode(struct device *dev, struct device_attribute *attr, | |
315 | char *buf) | |
316 | { | |
317 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
318 | ||
319 | return snprintf(buf, 20, "%s\n", lbp_mode[sdkp->provisioning_mode]); | |
320 | } | |
321 | ||
322 | static ssize_t | |
323 | sd_store_provisioning_mode(struct device *dev, struct device_attribute *attr, | |
324 | const char *buf, size_t count) | |
325 | { | |
326 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
327 | struct scsi_device *sdp = sdkp->device; | |
328 | ||
329 | if (!capable(CAP_SYS_ADMIN)) | |
330 | return -EACCES; | |
331 | ||
332 | if (sdp->type != TYPE_DISK) | |
333 | return -EINVAL; | |
334 | ||
335 | if (!strncmp(buf, lbp_mode[SD_LBP_UNMAP], 20)) | |
336 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
337 | else if (!strncmp(buf, lbp_mode[SD_LBP_WS16], 20)) | |
338 | sd_config_discard(sdkp, SD_LBP_WS16); | |
339 | else if (!strncmp(buf, lbp_mode[SD_LBP_WS10], 20)) | |
340 | sd_config_discard(sdkp, SD_LBP_WS10); | |
341 | else if (!strncmp(buf, lbp_mode[SD_LBP_ZERO], 20)) | |
342 | sd_config_discard(sdkp, SD_LBP_ZERO); | |
343 | else if (!strncmp(buf, lbp_mode[SD_LBP_DISABLE], 20)) | |
344 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
345 | else | |
346 | return -EINVAL; | |
347 | ||
348 | return count; | |
e339c1a7 MP |
349 | } |
350 | ||
18a4d0a2 MP |
351 | static ssize_t |
352 | sd_show_max_medium_access_timeouts(struct device *dev, | |
353 | struct device_attribute *attr, char *buf) | |
354 | { | |
355 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
356 | ||
357 | return snprintf(buf, 20, "%u\n", sdkp->max_medium_access_timeouts); | |
358 | } | |
359 | ||
360 | static ssize_t | |
361 | sd_store_max_medium_access_timeouts(struct device *dev, | |
362 | struct device_attribute *attr, | |
363 | const char *buf, size_t count) | |
364 | { | |
365 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
366 | int err; | |
367 | ||
368 | if (!capable(CAP_SYS_ADMIN)) | |
369 | return -EACCES; | |
370 | ||
371 | err = kstrtouint(buf, 10, &sdkp->max_medium_access_timeouts); | |
372 | ||
373 | return err ? err : count; | |
374 | } | |
375 | ||
ee959b00 | 376 | static struct device_attribute sd_disk_attrs[] = { |
6bdaa1f1 JB |
377 | __ATTR(cache_type, S_IRUGO|S_IWUSR, sd_show_cache_type, |
378 | sd_store_cache_type), | |
379 | __ATTR(FUA, S_IRUGO, sd_show_fua, NULL), | |
a144c5ae BK |
380 | __ATTR(allow_restart, S_IRUGO|S_IWUSR, sd_show_allow_restart, |
381 | sd_store_allow_restart), | |
c3c94c5a TH |
382 | __ATTR(manage_start_stop, S_IRUGO|S_IWUSR, sd_show_manage_start_stop, |
383 | sd_store_manage_start_stop), | |
e0597d70 | 384 | __ATTR(protection_type, S_IRUGO, sd_show_protection_type, NULL), |
518fa8e3 | 385 | __ATTR(protection_mode, S_IRUGO, sd_show_protection_mode, NULL), |
e0597d70 | 386 | __ATTR(app_tag_own, S_IRUGO, sd_show_app_tag_own, NULL), |
e339c1a7 | 387 | __ATTR(thin_provisioning, S_IRUGO, sd_show_thin_provisioning, NULL), |
c98a0eb0 MP |
388 | __ATTR(provisioning_mode, S_IRUGO|S_IWUSR, sd_show_provisioning_mode, |
389 | sd_store_provisioning_mode), | |
18a4d0a2 MP |
390 | __ATTR(max_medium_access_timeouts, S_IRUGO|S_IWUSR, |
391 | sd_show_max_medium_access_timeouts, | |
392 | sd_store_max_medium_access_timeouts), | |
6bdaa1f1 JB |
393 | __ATTR_NULL, |
394 | }; | |
395 | ||
396 | static struct class sd_disk_class = { | |
397 | .name = "scsi_disk", | |
398 | .owner = THIS_MODULE, | |
ee959b00 TJ |
399 | .dev_release = scsi_disk_release, |
400 | .dev_attrs = sd_disk_attrs, | |
6bdaa1f1 | 401 | }; |
1da177e4 LT |
402 | |
403 | static struct scsi_driver sd_template = { | |
404 | .owner = THIS_MODULE, | |
405 | .gendrv = { | |
406 | .name = "sd", | |
407 | .probe = sd_probe, | |
408 | .remove = sd_remove, | |
c3c94c5a TH |
409 | .suspend = sd_suspend, |
410 | .resume = sd_resume, | |
1da177e4 LT |
411 | .shutdown = sd_shutdown, |
412 | }, | |
413 | .rescan = sd_rescan, | |
7b3d9545 | 414 | .done = sd_done, |
18a4d0a2 | 415 | .eh_action = sd_eh_action, |
1da177e4 LT |
416 | }; |
417 | ||
418 | /* | |
419 | * Device no to disk mapping: | |
420 | * | |
421 | * major disc2 disc p1 | |
422 | * |............|.............|....|....| <- dev_t | |
423 | * 31 20 19 8 7 4 3 0 | |
424 | * | |
425 | * Inside a major, we have 16k disks, however mapped non- | |
426 | * contiguously. The first 16 disks are for major0, the next | |
427 | * ones with major1, ... Disk 256 is for major0 again, disk 272 | |
428 | * for major1, ... | |
429 | * As we stay compatible with our numbering scheme, we can reuse | |
430 | * the well-know SCSI majors 8, 65--71, 136--143. | |
431 | */ | |
432 | static int sd_major(int major_idx) | |
433 | { | |
434 | switch (major_idx) { | |
435 | case 0: | |
436 | return SCSI_DISK0_MAJOR; | |
437 | case 1 ... 7: | |
438 | return SCSI_DISK1_MAJOR + major_idx - 1; | |
439 | case 8 ... 15: | |
440 | return SCSI_DISK8_MAJOR + major_idx - 8; | |
441 | default: | |
442 | BUG(); | |
443 | return 0; /* shut up gcc */ | |
444 | } | |
445 | } | |
446 | ||
39b7f1e2 | 447 | static struct scsi_disk *__scsi_disk_get(struct gendisk *disk) |
1da177e4 LT |
448 | { |
449 | struct scsi_disk *sdkp = NULL; | |
450 | ||
39b7f1e2 AS |
451 | if (disk->private_data) { |
452 | sdkp = scsi_disk(disk); | |
453 | if (scsi_device_get(sdkp->device) == 0) | |
ee959b00 | 454 | get_device(&sdkp->dev); |
39b7f1e2 AS |
455 | else |
456 | sdkp = NULL; | |
457 | } | |
458 | return sdkp; | |
459 | } | |
460 | ||
461 | static struct scsi_disk *scsi_disk_get(struct gendisk *disk) | |
462 | { | |
463 | struct scsi_disk *sdkp; | |
464 | ||
0b950672 | 465 | mutex_lock(&sd_ref_mutex); |
39b7f1e2 | 466 | sdkp = __scsi_disk_get(disk); |
0b950672 | 467 | mutex_unlock(&sd_ref_mutex); |
1da177e4 | 468 | return sdkp; |
39b7f1e2 | 469 | } |
1da177e4 | 470 | |
39b7f1e2 AS |
471 | static struct scsi_disk *scsi_disk_get_from_dev(struct device *dev) |
472 | { | |
473 | struct scsi_disk *sdkp; | |
474 | ||
0b950672 | 475 | mutex_lock(&sd_ref_mutex); |
39b7f1e2 AS |
476 | sdkp = dev_get_drvdata(dev); |
477 | if (sdkp) | |
478 | sdkp = __scsi_disk_get(sdkp->disk); | |
0b950672 | 479 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
480 | return sdkp; |
481 | } | |
482 | ||
483 | static void scsi_disk_put(struct scsi_disk *sdkp) | |
484 | { | |
485 | struct scsi_device *sdev = sdkp->device; | |
486 | ||
0b950672 | 487 | mutex_lock(&sd_ref_mutex); |
ee959b00 | 488 | put_device(&sdkp->dev); |
1da177e4 | 489 | scsi_device_put(sdev); |
0b950672 | 490 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
491 | } |
492 | ||
35e1a5d9 MP |
493 | static void sd_prot_op(struct scsi_cmnd *scmd, unsigned int dif) |
494 | { | |
495 | unsigned int prot_op = SCSI_PROT_NORMAL; | |
496 | unsigned int dix = scsi_prot_sg_count(scmd); | |
497 | ||
498 | if (scmd->sc_data_direction == DMA_FROM_DEVICE) { | |
499 | if (dif && dix) | |
500 | prot_op = SCSI_PROT_READ_PASS; | |
501 | else if (dif && !dix) | |
502 | prot_op = SCSI_PROT_READ_STRIP; | |
503 | else if (!dif && dix) | |
504 | prot_op = SCSI_PROT_READ_INSERT; | |
505 | } else { | |
506 | if (dif && dix) | |
507 | prot_op = SCSI_PROT_WRITE_PASS; | |
508 | else if (dif && !dix) | |
509 | prot_op = SCSI_PROT_WRITE_INSERT; | |
510 | else if (!dif && dix) | |
511 | prot_op = SCSI_PROT_WRITE_STRIP; | |
512 | } | |
513 | ||
514 | scsi_set_prot_op(scmd, prot_op); | |
515 | scsi_set_prot_type(scmd, dif); | |
516 | } | |
517 | ||
c98a0eb0 MP |
518 | static void sd_config_discard(struct scsi_disk *sdkp, unsigned int mode) |
519 | { | |
520 | struct request_queue *q = sdkp->disk->queue; | |
521 | unsigned int logical_block_size = sdkp->device->sector_size; | |
522 | unsigned int max_blocks = 0; | |
523 | ||
524 | q->limits.discard_zeroes_data = sdkp->lbprz; | |
2a8cfad0 MP |
525 | q->limits.discard_alignment = sdkp->unmap_alignment * |
526 | logical_block_size; | |
c98a0eb0 MP |
527 | q->limits.discard_granularity = |
528 | max(sdkp->physical_block_size, | |
529 | sdkp->unmap_granularity * logical_block_size); | |
530 | ||
89730393 MP |
531 | sdkp->provisioning_mode = mode; |
532 | ||
c98a0eb0 MP |
533 | switch (mode) { |
534 | ||
535 | case SD_LBP_DISABLE: | |
536 | q->limits.max_discard_sectors = 0; | |
537 | queue_flag_clear_unlocked(QUEUE_FLAG_DISCARD, q); | |
538 | return; | |
539 | ||
540 | case SD_LBP_UNMAP: | |
541 | max_blocks = min_not_zero(sdkp->max_unmap_blocks, 0xffffffff); | |
542 | break; | |
543 | ||
544 | case SD_LBP_WS16: | |
545 | max_blocks = min_not_zero(sdkp->max_ws_blocks, 0xffffffff); | |
546 | break; | |
547 | ||
548 | case SD_LBP_WS10: | |
549 | max_blocks = min_not_zero(sdkp->max_ws_blocks, (u32)0xffff); | |
550 | break; | |
551 | ||
552 | case SD_LBP_ZERO: | |
553 | max_blocks = min_not_zero(sdkp->max_ws_blocks, (u32)0xffff); | |
554 | q->limits.discard_zeroes_data = 1; | |
555 | break; | |
556 | } | |
557 | ||
558 | q->limits.max_discard_sectors = max_blocks * (logical_block_size >> 9); | |
559 | queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, q); | |
c98a0eb0 MP |
560 | } |
561 | ||
e339c1a7 | 562 | /** |
66ac0280 CH |
563 | * scsi_setup_discard_cmnd - unmap blocks on thinly provisioned device |
564 | * @sdp: scsi device to operate one | |
e339c1a7 MP |
565 | * @rq: Request to prepare |
566 | * | |
567 | * Will issue either UNMAP or WRITE SAME(16) depending on preference | |
568 | * indicated by target device. | |
569 | **/ | |
66ac0280 | 570 | static int scsi_setup_discard_cmnd(struct scsi_device *sdp, struct request *rq) |
e339c1a7 MP |
571 | { |
572 | struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); | |
573 | struct bio *bio = rq->bio; | |
574 | sector_t sector = bio->bi_sector; | |
66ac0280 CH |
575 | unsigned int nr_sectors = bio_sectors(bio); |
576 | unsigned int len; | |
f1126e95 | 577 | int ret; |
c98a0eb0 | 578 | char *buf; |
66ac0280 | 579 | struct page *page; |
e339c1a7 MP |
580 | |
581 | if (sdkp->device->sector_size == 4096) { | |
582 | sector >>= 3; | |
66ac0280 | 583 | nr_sectors >>= 3; |
e339c1a7 MP |
584 | } |
585 | ||
e339c1a7 MP |
586 | rq->timeout = SD_TIMEOUT; |
587 | ||
588 | memset(rq->cmd, 0, rq->cmd_len); | |
589 | ||
66ac0280 CH |
590 | page = alloc_page(GFP_ATOMIC | __GFP_ZERO); |
591 | if (!page) | |
592 | return BLKPREP_DEFER; | |
593 | ||
c98a0eb0 MP |
594 | switch (sdkp->provisioning_mode) { |
595 | case SD_LBP_UNMAP: | |
596 | buf = page_address(page); | |
e339c1a7 | 597 | |
66ac0280 | 598 | rq->cmd_len = 10; |
e339c1a7 MP |
599 | rq->cmd[0] = UNMAP; |
600 | rq->cmd[8] = 24; | |
e339c1a7 MP |
601 | |
602 | put_unaligned_be16(6 + 16, &buf[0]); | |
603 | put_unaligned_be16(16, &buf[2]); | |
604 | put_unaligned_be64(sector, &buf[8]); | |
66ac0280 | 605 | put_unaligned_be32(nr_sectors, &buf[16]); |
e339c1a7 | 606 | |
66ac0280 | 607 | len = 24; |
c98a0eb0 MP |
608 | break; |
609 | ||
610 | case SD_LBP_WS16: | |
66ac0280 | 611 | rq->cmd_len = 16; |
e339c1a7 MP |
612 | rq->cmd[0] = WRITE_SAME_16; |
613 | rq->cmd[1] = 0x8; /* UNMAP */ | |
614 | put_unaligned_be64(sector, &rq->cmd[2]); | |
66ac0280 CH |
615 | put_unaligned_be32(nr_sectors, &rq->cmd[10]); |
616 | ||
617 | len = sdkp->device->sector_size; | |
c98a0eb0 MP |
618 | break; |
619 | ||
620 | case SD_LBP_WS10: | |
621 | case SD_LBP_ZERO: | |
622 | rq->cmd_len = 10; | |
623 | rq->cmd[0] = WRITE_SAME; | |
624 | if (sdkp->provisioning_mode == SD_LBP_WS10) | |
625 | rq->cmd[1] = 0x8; /* UNMAP */ | |
626 | put_unaligned_be32(sector, &rq->cmd[2]); | |
627 | put_unaligned_be16(nr_sectors, &rq->cmd[7]); | |
628 | ||
629 | len = sdkp->device->sector_size; | |
630 | break; | |
631 | ||
632 | default: | |
09b9cc44 | 633 | ret = BLKPREP_KILL; |
c98a0eb0 | 634 | goto out; |
e339c1a7 MP |
635 | } |
636 | ||
66ac0280 | 637 | blk_add_request_payload(rq, page, len); |
f1126e95 FT |
638 | ret = scsi_setup_blk_pc_cmnd(sdp, rq); |
639 | rq->buffer = page_address(page); | |
c98a0eb0 MP |
640 | |
641 | out: | |
610a6349 FT |
642 | if (ret != BLKPREP_OK) { |
643 | __free_page(page); | |
644 | rq->buffer = NULL; | |
645 | } | |
f1126e95 FT |
646 | return ret; |
647 | } | |
648 | ||
90467c29 FT |
649 | static int scsi_setup_flush_cmnd(struct scsi_device *sdp, struct request *rq) |
650 | { | |
e3b3e624 | 651 | rq->timeout = SD_FLUSH_TIMEOUT; |
90467c29 FT |
652 | rq->retries = SD_MAX_RETRIES; |
653 | rq->cmd[0] = SYNCHRONIZE_CACHE; | |
654 | rq->cmd_len = 10; | |
655 | ||
656 | return scsi_setup_blk_pc_cmnd(sdp, rq); | |
657 | } | |
658 | ||
f1126e95 FT |
659 | static void sd_unprep_fn(struct request_queue *q, struct request *rq) |
660 | { | |
610a6349 FT |
661 | if (rq->cmd_flags & REQ_DISCARD) { |
662 | free_page((unsigned long)rq->buffer); | |
663 | rq->buffer = NULL; | |
664 | } | |
e339c1a7 MP |
665 | } |
666 | ||
1da177e4 | 667 | /** |
2db93ce8 | 668 | * sd_prep_fn - build a scsi (read or write) command from |
1da177e4 LT |
669 | * information in the request structure. |
670 | * @SCpnt: pointer to mid-level's per scsi command structure that | |
671 | * contains request and into which the scsi command is written | |
672 | * | |
673 | * Returns 1 if successful and 0 if error (or cannot be done now). | |
674 | **/ | |
7f9a6bc4 | 675 | static int sd_prep_fn(struct request_queue *q, struct request *rq) |
1da177e4 | 676 | { |
7f9a6bc4 JB |
677 | struct scsi_cmnd *SCpnt; |
678 | struct scsi_device *sdp = q->queuedata; | |
776b23a0 | 679 | struct gendisk *disk = rq->rq_disk; |
af55ff67 | 680 | struct scsi_disk *sdkp; |
83096ebf | 681 | sector_t block = blk_rq_pos(rq); |
18351070 | 682 | sector_t threshold; |
83096ebf | 683 | unsigned int this_count = blk_rq_sectors(rq); |
bd623e79 | 684 | int ret, host_dif; |
4e7392ec | 685 | unsigned char protect; |
7f9a6bc4 | 686 | |
e339c1a7 MP |
687 | /* |
688 | * Discard request come in as REQ_TYPE_FS but we turn them into | |
689 | * block PC requests to make life easier. | |
690 | */ | |
66ac0280 CH |
691 | if (rq->cmd_flags & REQ_DISCARD) { |
692 | ret = scsi_setup_discard_cmnd(sdp, rq); | |
693 | goto out; | |
90467c29 FT |
694 | } else if (rq->cmd_flags & REQ_FLUSH) { |
695 | ret = scsi_setup_flush_cmnd(sdp, rq); | |
696 | goto out; | |
66ac0280 | 697 | } else if (rq->cmd_type == REQ_TYPE_BLOCK_PC) { |
7f9a6bc4 JB |
698 | ret = scsi_setup_blk_pc_cmnd(sdp, rq); |
699 | goto out; | |
700 | } else if (rq->cmd_type != REQ_TYPE_FS) { | |
701 | ret = BLKPREP_KILL; | |
702 | goto out; | |
703 | } | |
704 | ret = scsi_setup_fs_cmnd(sdp, rq); | |
705 | if (ret != BLKPREP_OK) | |
706 | goto out; | |
707 | SCpnt = rq->special; | |
af55ff67 | 708 | sdkp = scsi_disk(disk); |
7f9a6bc4 JB |
709 | |
710 | /* from here on until we're complete, any goto out | |
711 | * is used for a killable error condition */ | |
712 | ret = BLKPREP_KILL; | |
1da177e4 | 713 | |
fa0d34be | 714 | SCSI_LOG_HLQUEUE(1, scmd_printk(KERN_INFO, SCpnt, |
2db93ce8 | 715 | "sd_prep_fn: block=%llu, " |
fa0d34be MP |
716 | "count=%d\n", |
717 | (unsigned long long)block, | |
718 | this_count)); | |
1da177e4 LT |
719 | |
720 | if (!sdp || !scsi_device_online(sdp) || | |
83096ebf | 721 | block + blk_rq_sectors(rq) > get_capacity(disk)) { |
fa0d34be | 722 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
83096ebf TH |
723 | "Finishing %u sectors\n", |
724 | blk_rq_sectors(rq))); | |
fa0d34be MP |
725 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
726 | "Retry with 0x%p\n", SCpnt)); | |
7f9a6bc4 | 727 | goto out; |
1da177e4 LT |
728 | } |
729 | ||
730 | if (sdp->changed) { | |
731 | /* | |
732 | * quietly refuse to do anything to a changed disc until | |
733 | * the changed bit has been reset | |
734 | */ | |
3ff5588d | 735 | /* printk("SCSI disk has been changed or is not present. Prohibiting further I/O.\n"); */ |
7f9a6bc4 | 736 | goto out; |
1da177e4 | 737 | } |
7f9a6bc4 | 738 | |
a0899d4d | 739 | /* |
18351070 LT |
740 | * Some SD card readers can't handle multi-sector accesses which touch |
741 | * the last one or two hardware sectors. Split accesses as needed. | |
a0899d4d | 742 | */ |
18351070 LT |
743 | threshold = get_capacity(disk) - SD_LAST_BUGGY_SECTORS * |
744 | (sdp->sector_size / 512); | |
745 | ||
746 | if (unlikely(sdp->last_sector_bug && block + this_count > threshold)) { | |
747 | if (block < threshold) { | |
748 | /* Access up to the threshold but not beyond */ | |
749 | this_count = threshold - block; | |
750 | } else { | |
751 | /* Access only a single hardware sector */ | |
752 | this_count = sdp->sector_size / 512; | |
753 | } | |
754 | } | |
a0899d4d | 755 | |
fa0d34be MP |
756 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, "block=%llu\n", |
757 | (unsigned long long)block)); | |
1da177e4 LT |
758 | |
759 | /* | |
760 | * If we have a 1K hardware sectorsize, prevent access to single | |
761 | * 512 byte sectors. In theory we could handle this - in fact | |
762 | * the scsi cdrom driver must be able to handle this because | |
763 | * we typically use 1K blocksizes, and cdroms typically have | |
764 | * 2K hardware sectorsizes. Of course, things are simpler | |
765 | * with the cdrom, since it is read-only. For performance | |
766 | * reasons, the filesystems should be able to handle this | |
767 | * and not force the scsi disk driver to use bounce buffers | |
768 | * for this. | |
769 | */ | |
770 | if (sdp->sector_size == 1024) { | |
83096ebf | 771 | if ((block & 1) || (blk_rq_sectors(rq) & 1)) { |
e73aec82 MP |
772 | scmd_printk(KERN_ERR, SCpnt, |
773 | "Bad block number requested\n"); | |
7f9a6bc4 | 774 | goto out; |
1da177e4 LT |
775 | } else { |
776 | block = block >> 1; | |
777 | this_count = this_count >> 1; | |
778 | } | |
779 | } | |
780 | if (sdp->sector_size == 2048) { | |
83096ebf | 781 | if ((block & 3) || (blk_rq_sectors(rq) & 3)) { |
e73aec82 MP |
782 | scmd_printk(KERN_ERR, SCpnt, |
783 | "Bad block number requested\n"); | |
7f9a6bc4 | 784 | goto out; |
1da177e4 LT |
785 | } else { |
786 | block = block >> 2; | |
787 | this_count = this_count >> 2; | |
788 | } | |
789 | } | |
790 | if (sdp->sector_size == 4096) { | |
83096ebf | 791 | if ((block & 7) || (blk_rq_sectors(rq) & 7)) { |
e73aec82 MP |
792 | scmd_printk(KERN_ERR, SCpnt, |
793 | "Bad block number requested\n"); | |
7f9a6bc4 | 794 | goto out; |
1da177e4 LT |
795 | } else { |
796 | block = block >> 3; | |
797 | this_count = this_count >> 3; | |
798 | } | |
799 | } | |
800 | if (rq_data_dir(rq) == WRITE) { | |
801 | if (!sdp->writeable) { | |
7f9a6bc4 | 802 | goto out; |
1da177e4 LT |
803 | } |
804 | SCpnt->cmnd[0] = WRITE_6; | |
805 | SCpnt->sc_data_direction = DMA_TO_DEVICE; | |
af55ff67 MP |
806 | |
807 | if (blk_integrity_rq(rq) && | |
808 | sd_dif_prepare(rq, block, sdp->sector_size) == -EIO) | |
809 | goto out; | |
810 | ||
1da177e4 LT |
811 | } else if (rq_data_dir(rq) == READ) { |
812 | SCpnt->cmnd[0] = READ_6; | |
813 | SCpnt->sc_data_direction = DMA_FROM_DEVICE; | |
814 | } else { | |
e73aec82 | 815 | scmd_printk(KERN_ERR, SCpnt, "Unknown command %x\n", rq->cmd_flags); |
7f9a6bc4 | 816 | goto out; |
1da177e4 LT |
817 | } |
818 | ||
fa0d34be | 819 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
83096ebf | 820 | "%s %d/%u 512 byte blocks.\n", |
fa0d34be MP |
821 | (rq_data_dir(rq) == WRITE) ? |
822 | "writing" : "reading", this_count, | |
83096ebf | 823 | blk_rq_sectors(rq))); |
1da177e4 | 824 | |
af55ff67 | 825 | /* Set RDPROTECT/WRPROTECT if disk is formatted with DIF */ |
bd623e79 MP |
826 | host_dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type); |
827 | if (host_dif) | |
4e7392ec | 828 | protect = 1 << 5; |
af55ff67 | 829 | else |
4e7392ec MP |
830 | protect = 0; |
831 | ||
832 | if (host_dif == SD_DIF_TYPE2_PROTECTION) { | |
833 | SCpnt->cmnd = mempool_alloc(sd_cdb_pool, GFP_ATOMIC); | |
834 | ||
835 | if (unlikely(SCpnt->cmnd == NULL)) { | |
836 | ret = BLKPREP_DEFER; | |
837 | goto out; | |
838 | } | |
af55ff67 | 839 | |
4e7392ec MP |
840 | SCpnt->cmd_len = SD_EXT_CDB_SIZE; |
841 | memset(SCpnt->cmnd, 0, SCpnt->cmd_len); | |
842 | SCpnt->cmnd[0] = VARIABLE_LENGTH_CMD; | |
843 | SCpnt->cmnd[7] = 0x18; | |
844 | SCpnt->cmnd[9] = (rq_data_dir(rq) == READ) ? READ_32 : WRITE_32; | |
33659ebb | 845 | SCpnt->cmnd[10] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
4e7392ec MP |
846 | |
847 | /* LBA */ | |
848 | SCpnt->cmnd[12] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0; | |
849 | SCpnt->cmnd[13] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0; | |
850 | SCpnt->cmnd[14] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0; | |
851 | SCpnt->cmnd[15] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0; | |
852 | SCpnt->cmnd[16] = (unsigned char) (block >> 24) & 0xff; | |
853 | SCpnt->cmnd[17] = (unsigned char) (block >> 16) & 0xff; | |
854 | SCpnt->cmnd[18] = (unsigned char) (block >> 8) & 0xff; | |
855 | SCpnt->cmnd[19] = (unsigned char) block & 0xff; | |
856 | ||
857 | /* Expected Indirect LBA */ | |
858 | SCpnt->cmnd[20] = (unsigned char) (block >> 24) & 0xff; | |
859 | SCpnt->cmnd[21] = (unsigned char) (block >> 16) & 0xff; | |
860 | SCpnt->cmnd[22] = (unsigned char) (block >> 8) & 0xff; | |
861 | SCpnt->cmnd[23] = (unsigned char) block & 0xff; | |
862 | ||
863 | /* Transfer length */ | |
864 | SCpnt->cmnd[28] = (unsigned char) (this_count >> 24) & 0xff; | |
865 | SCpnt->cmnd[29] = (unsigned char) (this_count >> 16) & 0xff; | |
866 | SCpnt->cmnd[30] = (unsigned char) (this_count >> 8) & 0xff; | |
867 | SCpnt->cmnd[31] = (unsigned char) this_count & 0xff; | |
868 | } else if (block > 0xffffffff) { | |
1da177e4 | 869 | SCpnt->cmnd[0] += READ_16 - READ_6; |
33659ebb | 870 | SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
1da177e4 LT |
871 | SCpnt->cmnd[2] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0; |
872 | SCpnt->cmnd[3] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0; | |
873 | SCpnt->cmnd[4] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0; | |
874 | SCpnt->cmnd[5] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0; | |
875 | SCpnt->cmnd[6] = (unsigned char) (block >> 24) & 0xff; | |
876 | SCpnt->cmnd[7] = (unsigned char) (block >> 16) & 0xff; | |
877 | SCpnt->cmnd[8] = (unsigned char) (block >> 8) & 0xff; | |
878 | SCpnt->cmnd[9] = (unsigned char) block & 0xff; | |
879 | SCpnt->cmnd[10] = (unsigned char) (this_count >> 24) & 0xff; | |
880 | SCpnt->cmnd[11] = (unsigned char) (this_count >> 16) & 0xff; | |
881 | SCpnt->cmnd[12] = (unsigned char) (this_count >> 8) & 0xff; | |
882 | SCpnt->cmnd[13] = (unsigned char) this_count & 0xff; | |
883 | SCpnt->cmnd[14] = SCpnt->cmnd[15] = 0; | |
884 | } else if ((this_count > 0xff) || (block > 0x1fffff) || | |
af55ff67 | 885 | scsi_device_protection(SCpnt->device) || |
1da177e4 LT |
886 | SCpnt->device->use_10_for_rw) { |
887 | if (this_count > 0xffff) | |
888 | this_count = 0xffff; | |
889 | ||
890 | SCpnt->cmnd[0] += READ_10 - READ_6; | |
33659ebb | 891 | SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
1da177e4 LT |
892 | SCpnt->cmnd[2] = (unsigned char) (block >> 24) & 0xff; |
893 | SCpnt->cmnd[3] = (unsigned char) (block >> 16) & 0xff; | |
894 | SCpnt->cmnd[4] = (unsigned char) (block >> 8) & 0xff; | |
895 | SCpnt->cmnd[5] = (unsigned char) block & 0xff; | |
896 | SCpnt->cmnd[6] = SCpnt->cmnd[9] = 0; | |
897 | SCpnt->cmnd[7] = (unsigned char) (this_count >> 8) & 0xff; | |
898 | SCpnt->cmnd[8] = (unsigned char) this_count & 0xff; | |
899 | } else { | |
33659ebb | 900 | if (unlikely(rq->cmd_flags & REQ_FUA)) { |
007365ad TH |
901 | /* |
902 | * This happens only if this drive failed | |
903 | * 10byte rw command with ILLEGAL_REQUEST | |
904 | * during operation and thus turned off | |
905 | * use_10_for_rw. | |
906 | */ | |
e73aec82 MP |
907 | scmd_printk(KERN_ERR, SCpnt, |
908 | "FUA write on READ/WRITE(6) drive\n"); | |
7f9a6bc4 | 909 | goto out; |
007365ad TH |
910 | } |
911 | ||
1da177e4 LT |
912 | SCpnt->cmnd[1] |= (unsigned char) ((block >> 16) & 0x1f); |
913 | SCpnt->cmnd[2] = (unsigned char) ((block >> 8) & 0xff); | |
914 | SCpnt->cmnd[3] = (unsigned char) block & 0xff; | |
915 | SCpnt->cmnd[4] = (unsigned char) this_count; | |
916 | SCpnt->cmnd[5] = 0; | |
917 | } | |
30b0c37b | 918 | SCpnt->sdb.length = this_count * sdp->sector_size; |
1da177e4 | 919 | |
af55ff67 | 920 | /* If DIF or DIX is enabled, tell HBA how to handle request */ |
bd623e79 | 921 | if (host_dif || scsi_prot_sg_count(SCpnt)) |
35e1a5d9 | 922 | sd_prot_op(SCpnt, host_dif); |
af55ff67 | 923 | |
1da177e4 LT |
924 | /* |
925 | * We shouldn't disconnect in the middle of a sector, so with a dumb | |
926 | * host adapter, it's safe to assume that we can at least transfer | |
927 | * this many bytes between each connect / disconnect. | |
928 | */ | |
929 | SCpnt->transfersize = sdp->sector_size; | |
930 | SCpnt->underflow = this_count << 9; | |
931 | SCpnt->allowed = SD_MAX_RETRIES; | |
1da177e4 | 932 | |
1da177e4 LT |
933 | /* |
934 | * This indicates that the command is ready from our end to be | |
935 | * queued. | |
936 | */ | |
7f9a6bc4 JB |
937 | ret = BLKPREP_OK; |
938 | out: | |
939 | return scsi_prep_return(q, rq, ret); | |
1da177e4 LT |
940 | } |
941 | ||
942 | /** | |
943 | * sd_open - open a scsi disk device | |
944 | * @inode: only i_rdev member may be used | |
945 | * @filp: only f_mode and f_flags may be used | |
946 | * | |
947 | * Returns 0 if successful. Returns a negated errno value in case | |
948 | * of error. | |
949 | * | |
950 | * Note: This can be called from a user context (e.g. fsck(1) ) | |
951 | * or from within the kernel (e.g. as a result of a mount(1) ). | |
952 | * In the latter case @inode and @filp carry an abridged amount | |
953 | * of information as noted above. | |
409f3499 AB |
954 | * |
955 | * Locking: called with bdev->bd_mutex held. | |
1da177e4 | 956 | **/ |
0338e291 | 957 | static int sd_open(struct block_device *bdev, fmode_t mode) |
1da177e4 | 958 | { |
0338e291 | 959 | struct scsi_disk *sdkp = scsi_disk_get(bdev->bd_disk); |
1da177e4 LT |
960 | struct scsi_device *sdev; |
961 | int retval; | |
962 | ||
0338e291 | 963 | if (!sdkp) |
1da177e4 LT |
964 | return -ENXIO; |
965 | ||
fa0d34be | 966 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_open\n")); |
1da177e4 LT |
967 | |
968 | sdev = sdkp->device; | |
969 | ||
478a8a05 AS |
970 | retval = scsi_autopm_get_device(sdev); |
971 | if (retval) | |
972 | goto error_autopm; | |
973 | ||
1da177e4 LT |
974 | /* |
975 | * If the device is in error recovery, wait until it is done. | |
976 | * If the device is offline, then disallow any access to it. | |
977 | */ | |
978 | retval = -ENXIO; | |
979 | if (!scsi_block_when_processing_errors(sdev)) | |
980 | goto error_out; | |
981 | ||
982 | if (sdev->removable || sdkp->write_prot) | |
0338e291 | 983 | check_disk_change(bdev); |
1da177e4 LT |
984 | |
985 | /* | |
986 | * If the drive is empty, just let the open fail. | |
987 | */ | |
988 | retval = -ENOMEDIUM; | |
0338e291 | 989 | if (sdev->removable && !sdkp->media_present && !(mode & FMODE_NDELAY)) |
1da177e4 LT |
990 | goto error_out; |
991 | ||
992 | /* | |
993 | * If the device has the write protect tab set, have the open fail | |
994 | * if the user expects to be able to write to the thing. | |
995 | */ | |
996 | retval = -EROFS; | |
0338e291 | 997 | if (sdkp->write_prot && (mode & FMODE_WRITE)) |
1da177e4 LT |
998 | goto error_out; |
999 | ||
1000 | /* | |
1001 | * It is possible that the disk changing stuff resulted in | |
1002 | * the device being taken offline. If this is the case, | |
1003 | * report this to the user, and don't pretend that the | |
1004 | * open actually succeeded. | |
1005 | */ | |
1006 | retval = -ENXIO; | |
1007 | if (!scsi_device_online(sdev)) | |
1008 | goto error_out; | |
1009 | ||
409f3499 | 1010 | if ((atomic_inc_return(&sdkp->openers) == 1) && sdev->removable) { |
1da177e4 LT |
1011 | if (scsi_block_when_processing_errors(sdev)) |
1012 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT); | |
1013 | } | |
1014 | ||
1015 | return 0; | |
1016 | ||
1017 | error_out: | |
478a8a05 AS |
1018 | scsi_autopm_put_device(sdev); |
1019 | error_autopm: | |
1da177e4 LT |
1020 | scsi_disk_put(sdkp); |
1021 | return retval; | |
1022 | } | |
1023 | ||
1024 | /** | |
1025 | * sd_release - invoked when the (last) close(2) is called on this | |
1026 | * scsi disk. | |
1027 | * @inode: only i_rdev member may be used | |
1028 | * @filp: only f_mode and f_flags may be used | |
1029 | * | |
1030 | * Returns 0. | |
1031 | * | |
1032 | * Note: may block (uninterruptible) if error recovery is underway | |
1033 | * on this disk. | |
409f3499 AB |
1034 | * |
1035 | * Locking: called with bdev->bd_mutex held. | |
1da177e4 | 1036 | **/ |
0338e291 | 1037 | static int sd_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 1038 | { |
1da177e4 LT |
1039 | struct scsi_disk *sdkp = scsi_disk(disk); |
1040 | struct scsi_device *sdev = sdkp->device; | |
1041 | ||
56937f7b | 1042 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_release\n")); |
1da177e4 | 1043 | |
7e443312 | 1044 | if (atomic_dec_return(&sdkp->openers) == 0 && sdev->removable) { |
1da177e4 LT |
1045 | if (scsi_block_when_processing_errors(sdev)) |
1046 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW); | |
1047 | } | |
1048 | ||
1049 | /* | |
1050 | * XXX and what if there are packets in flight and this close() | |
1051 | * XXX is followed by a "rmmod sd_mod"? | |
1052 | */ | |
478a8a05 AS |
1053 | |
1054 | scsi_autopm_put_device(sdev); | |
1da177e4 LT |
1055 | scsi_disk_put(sdkp); |
1056 | return 0; | |
1057 | } | |
1058 | ||
a885c8c4 | 1059 | static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
1da177e4 LT |
1060 | { |
1061 | struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk); | |
1062 | struct scsi_device *sdp = sdkp->device; | |
1063 | struct Scsi_Host *host = sdp->host; | |
1064 | int diskinfo[4]; | |
1065 | ||
1066 | /* default to most commonly used values */ | |
1067 | diskinfo[0] = 0x40; /* 1 << 6 */ | |
1068 | diskinfo[1] = 0x20; /* 1 << 5 */ | |
1069 | diskinfo[2] = sdkp->capacity >> 11; | |
1070 | ||
1071 | /* override with calculated, extended default, or driver values */ | |
1072 | if (host->hostt->bios_param) | |
1073 | host->hostt->bios_param(sdp, bdev, sdkp->capacity, diskinfo); | |
1074 | else | |
1075 | scsicam_bios_param(bdev, sdkp->capacity, diskinfo); | |
1076 | ||
a885c8c4 CH |
1077 | geo->heads = diskinfo[0]; |
1078 | geo->sectors = diskinfo[1]; | |
1079 | geo->cylinders = diskinfo[2]; | |
1da177e4 LT |
1080 | return 0; |
1081 | } | |
1082 | ||
1083 | /** | |
1084 | * sd_ioctl - process an ioctl | |
1085 | * @inode: only i_rdev/i_bdev members may be used | |
1086 | * @filp: only f_mode and f_flags may be used | |
1087 | * @cmd: ioctl command number | |
1088 | * @arg: this is third argument given to ioctl(2) system call. | |
1089 | * Often contains a pointer. | |
1090 | * | |
25985edc | 1091 | * Returns 0 if successful (some ioctls return positive numbers on |
1da177e4 LT |
1092 | * success as well). Returns a negated errno value in case of error. |
1093 | * | |
1094 | * Note: most ioctls are forward onto the block subsystem or further | |
3a4fa0a2 | 1095 | * down in the scsi subsystem. |
1da177e4 | 1096 | **/ |
0338e291 | 1097 | static int sd_ioctl(struct block_device *bdev, fmode_t mode, |
1da177e4 LT |
1098 | unsigned int cmd, unsigned long arg) |
1099 | { | |
1da177e4 | 1100 | struct gendisk *disk = bdev->bd_disk; |
fe2d1851 NN |
1101 | struct scsi_disk *sdkp = scsi_disk(disk); |
1102 | struct scsi_device *sdp = sdkp->device; | |
1da177e4 LT |
1103 | void __user *p = (void __user *)arg; |
1104 | int error; | |
1105 | ||
fe2d1851 NN |
1106 | SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO, sdkp, "sd_ioctl: disk=%s, " |
1107 | "cmd=0x%x\n", disk->disk_name, cmd)); | |
1da177e4 | 1108 | |
0bfc96cb PB |
1109 | error = scsi_verify_blk_ioctl(bdev, cmd); |
1110 | if (error < 0) | |
1111 | return error; | |
1112 | ||
1da177e4 LT |
1113 | /* |
1114 | * If we are in the middle of error recovery, don't let anyone | |
1115 | * else try and use this device. Also, if error recovery fails, it | |
1116 | * may try and take the device offline, in which case all further | |
1117 | * access to the device is prohibited. | |
1118 | */ | |
83ff6fe8 | 1119 | error = scsi_nonblockable_ioctl(sdp, cmd, p, |
fd4ce1ac | 1120 | (mode & FMODE_NDELAY) != 0); |
1da177e4 | 1121 | if (!scsi_block_when_processing_errors(sdp) || !error) |
8a6cfeb6 | 1122 | goto out; |
1da177e4 | 1123 | |
1da177e4 LT |
1124 | /* |
1125 | * Send SCSI addressing ioctls directly to mid level, send other | |
1126 | * ioctls to block level and then onto mid level if they can't be | |
1127 | * resolved. | |
1128 | */ | |
1129 | switch (cmd) { | |
1130 | case SCSI_IOCTL_GET_IDLUN: | |
1131 | case SCSI_IOCTL_GET_BUS_NUMBER: | |
8a6cfeb6 AB |
1132 | error = scsi_ioctl(sdp, cmd, p); |
1133 | break; | |
1da177e4 | 1134 | default: |
577ebb37 | 1135 | error = scsi_cmd_blk_ioctl(bdev, mode, cmd, p); |
1da177e4 | 1136 | if (error != -ENOTTY) |
8a6cfeb6 AB |
1137 | break; |
1138 | error = scsi_ioctl(sdp, cmd, p); | |
1139 | break; | |
1da177e4 | 1140 | } |
8a6cfeb6 | 1141 | out: |
8a6cfeb6 | 1142 | return error; |
1da177e4 LT |
1143 | } |
1144 | ||
1145 | static void set_media_not_present(struct scsi_disk *sdkp) | |
1146 | { | |
2bae0093 TH |
1147 | if (sdkp->media_present) |
1148 | sdkp->device->changed = 1; | |
1149 | ||
1150 | if (sdkp->device->removable) { | |
1151 | sdkp->media_present = 0; | |
1152 | sdkp->capacity = 0; | |
1153 | } | |
1154 | } | |
1155 | ||
1156 | static int media_not_present(struct scsi_disk *sdkp, | |
1157 | struct scsi_sense_hdr *sshdr) | |
1158 | { | |
1159 | if (!scsi_sense_valid(sshdr)) | |
1160 | return 0; | |
1161 | ||
1162 | /* not invoked for commands that could return deferred errors */ | |
1163 | switch (sshdr->sense_key) { | |
1164 | case UNIT_ATTENTION: | |
1165 | case NOT_READY: | |
1166 | /* medium not present */ | |
1167 | if (sshdr->asc == 0x3A) { | |
1168 | set_media_not_present(sdkp); | |
1169 | return 1; | |
1170 | } | |
1171 | } | |
1172 | return 0; | |
1da177e4 LT |
1173 | } |
1174 | ||
1175 | /** | |
2bae0093 TH |
1176 | * sd_check_events - check media events |
1177 | * @disk: kernel device descriptor | |
1178 | * @clearing: disk events currently being cleared | |
1da177e4 | 1179 | * |
2bae0093 | 1180 | * Returns mask of DISK_EVENT_*. |
1da177e4 LT |
1181 | * |
1182 | * Note: this function is invoked from the block subsystem. | |
1183 | **/ | |
2bae0093 | 1184 | static unsigned int sd_check_events(struct gendisk *disk, unsigned int clearing) |
1da177e4 LT |
1185 | { |
1186 | struct scsi_disk *sdkp = scsi_disk(disk); | |
1187 | struct scsi_device *sdp = sdkp->device; | |
001aac25 | 1188 | struct scsi_sense_hdr *sshdr = NULL; |
1da177e4 LT |
1189 | int retval; |
1190 | ||
2bae0093 | 1191 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_check_events\n")); |
1da177e4 LT |
1192 | |
1193 | /* | |
1194 | * If the device is offline, don't send any commands - just pretend as | |
1195 | * if the command failed. If the device ever comes back online, we | |
1196 | * can deal with it then. It is only because of unrecoverable errors | |
1197 | * that we would ever take a device offline in the first place. | |
1198 | */ | |
285e9670 KS |
1199 | if (!scsi_device_online(sdp)) { |
1200 | set_media_not_present(sdkp); | |
285e9670 KS |
1201 | goto out; |
1202 | } | |
1da177e4 LT |
1203 | |
1204 | /* | |
1205 | * Using TEST_UNIT_READY enables differentiation between drive with | |
1206 | * no cartridge loaded - NOT READY, drive with changed cartridge - | |
1207 | * UNIT ATTENTION, or with same cartridge - GOOD STATUS. | |
1208 | * | |
1209 | * Drives that auto spin down. eg iomega jaz 1G, will be started | |
1210 | * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever | |
1211 | * sd_revalidate() is called. | |
1212 | */ | |
1213 | retval = -ENODEV; | |
285e9670 | 1214 | |
001aac25 | 1215 | if (scsi_block_when_processing_errors(sdp)) { |
4e2247b2 LT |
1216 | retval = scsi_autopm_get_device(sdp); |
1217 | if (retval) | |
1218 | goto out; | |
1219 | ||
001aac25 JB |
1220 | sshdr = kzalloc(sizeof(*sshdr), GFP_KERNEL); |
1221 | retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, SD_MAX_RETRIES, | |
1222 | sshdr); | |
4e2247b2 | 1223 | scsi_autopm_put_device(sdp); |
001aac25 | 1224 | } |
1da177e4 | 1225 | |
2bae0093 TH |
1226 | /* failed to execute TUR, assume media not present */ |
1227 | if (host_byte(retval)) { | |
285e9670 | 1228 | set_media_not_present(sdkp); |
285e9670 KS |
1229 | goto out; |
1230 | } | |
1da177e4 | 1231 | |
2bae0093 TH |
1232 | if (media_not_present(sdkp, sshdr)) |
1233 | goto out; | |
1234 | ||
1da177e4 LT |
1235 | /* |
1236 | * For removable scsi disk we have to recognise the presence | |
2bae0093 | 1237 | * of a disk in the drive. |
1da177e4 | 1238 | */ |
2bae0093 TH |
1239 | if (!sdkp->media_present) |
1240 | sdp->changed = 1; | |
1da177e4 | 1241 | sdkp->media_present = 1; |
285e9670 | 1242 | out: |
3ff5588d | 1243 | /* |
2bae0093 | 1244 | * sdp->changed is set under the following conditions: |
3ff5588d | 1245 | * |
2bae0093 TH |
1246 | * Medium present state has changed in either direction. |
1247 | * Device has indicated UNIT_ATTENTION. | |
3ff5588d | 1248 | */ |
001aac25 | 1249 | kfree(sshdr); |
2bae0093 TH |
1250 | retval = sdp->changed ? DISK_EVENT_MEDIA_CHANGE : 0; |
1251 | sdp->changed = 0; | |
1da177e4 | 1252 | return retval; |
1da177e4 LT |
1253 | } |
1254 | ||
e73aec82 | 1255 | static int sd_sync_cache(struct scsi_disk *sdkp) |
1da177e4 | 1256 | { |
1da177e4 | 1257 | int retries, res; |
e73aec82 | 1258 | struct scsi_device *sdp = sdkp->device; |
ea73a9f2 | 1259 | struct scsi_sense_hdr sshdr; |
1da177e4 LT |
1260 | |
1261 | if (!scsi_device_online(sdp)) | |
1262 | return -ENODEV; | |
1263 | ||
1da177e4 | 1264 | |
1da177e4 LT |
1265 | for (retries = 3; retries > 0; --retries) { |
1266 | unsigned char cmd[10] = { 0 }; | |
1267 | ||
1268 | cmd[0] = SYNCHRONIZE_CACHE; | |
1269 | /* | |
1270 | * Leave the rest of the command zero to indicate | |
1271 | * flush everything. | |
1272 | */ | |
ea73a9f2 | 1273 | res = scsi_execute_req(sdp, cmd, DMA_NONE, NULL, 0, &sshdr, |
e3b3e624 | 1274 | SD_FLUSH_TIMEOUT, SD_MAX_RETRIES, NULL); |
ea73a9f2 | 1275 | if (res == 0) |
1da177e4 LT |
1276 | break; |
1277 | } | |
1278 | ||
e73aec82 MP |
1279 | if (res) { |
1280 | sd_print_result(sdkp, res); | |
1281 | if (driver_byte(res) & DRIVER_SENSE) | |
1282 | sd_print_sense_hdr(sdkp, &sshdr); | |
1da177e4 LT |
1283 | } |
1284 | ||
3721050a TH |
1285 | if (res) |
1286 | return -EIO; | |
1287 | return 0; | |
1da177e4 LT |
1288 | } |
1289 | ||
1da177e4 LT |
1290 | static void sd_rescan(struct device *dev) |
1291 | { | |
39b7f1e2 AS |
1292 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
1293 | ||
1294 | if (sdkp) { | |
f98a8cae | 1295 | revalidate_disk(sdkp->disk); |
39b7f1e2 AS |
1296 | scsi_disk_put(sdkp); |
1297 | } | |
1da177e4 LT |
1298 | } |
1299 | ||
1300 | ||
1301 | #ifdef CONFIG_COMPAT | |
1302 | /* | |
1303 | * This gets directly called from VFS. When the ioctl | |
1304 | * is not recognized we go back to the other translation paths. | |
1305 | */ | |
0338e291 AV |
1306 | static int sd_compat_ioctl(struct block_device *bdev, fmode_t mode, |
1307 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1308 | { |
0338e291 | 1309 | struct scsi_device *sdev = scsi_disk(bdev->bd_disk)->device; |
0bfc96cb PB |
1310 | int ret; |
1311 | ||
1312 | ret = scsi_verify_blk_ioctl(bdev, cmd); | |
1313 | if (ret < 0) | |
1314 | return ret; | |
1da177e4 LT |
1315 | |
1316 | /* | |
1317 | * If we are in the middle of error recovery, don't let anyone | |
1318 | * else try and use this device. Also, if error recovery fails, it | |
1319 | * may try and take the device offline, in which case all further | |
1320 | * access to the device is prohibited. | |
1321 | */ | |
1322 | if (!scsi_block_when_processing_errors(sdev)) | |
1323 | return -ENODEV; | |
1324 | ||
1325 | if (sdev->host->hostt->compat_ioctl) { | |
1da177e4 LT |
1326 | ret = sdev->host->hostt->compat_ioctl(sdev, cmd, (void __user *)arg); |
1327 | ||
1328 | return ret; | |
1329 | } | |
1330 | ||
1331 | /* | |
1332 | * Let the static ioctl translation table take care of it. | |
1333 | */ | |
1334 | return -ENOIOCTLCMD; | |
1335 | } | |
1336 | #endif | |
1337 | ||
83d5cde4 | 1338 | static const struct block_device_operations sd_fops = { |
1da177e4 | 1339 | .owner = THIS_MODULE, |
0338e291 AV |
1340 | .open = sd_open, |
1341 | .release = sd_release, | |
8a6cfeb6 | 1342 | .ioctl = sd_ioctl, |
a885c8c4 | 1343 | .getgeo = sd_getgeo, |
1da177e4 | 1344 | #ifdef CONFIG_COMPAT |
0338e291 | 1345 | .compat_ioctl = sd_compat_ioctl, |
1da177e4 | 1346 | #endif |
2bae0093 | 1347 | .check_events = sd_check_events, |
1da177e4 | 1348 | .revalidate_disk = sd_revalidate_disk, |
72ec24bd | 1349 | .unlock_native_capacity = sd_unlock_native_capacity, |
1da177e4 LT |
1350 | }; |
1351 | ||
18a4d0a2 MP |
1352 | /** |
1353 | * sd_eh_action - error handling callback | |
1354 | * @scmd: sd-issued command that has failed | |
1355 | * @eh_cmnd: The command that was sent during error handling | |
1356 | * @eh_cmnd_len: Length of eh_cmnd in bytes | |
1357 | * @eh_disp: The recovery disposition suggested by the midlayer | |
1358 | * | |
1359 | * This function is called by the SCSI midlayer upon completion of | |
1360 | * an error handling command (TEST UNIT READY, START STOP UNIT, | |
1361 | * etc.) The command sent to the device by the error handler is | |
1362 | * stored in eh_cmnd. The result of sending the eh command is | |
1363 | * passed in eh_disp. | |
1364 | **/ | |
1365 | static int sd_eh_action(struct scsi_cmnd *scmd, unsigned char *eh_cmnd, | |
1366 | int eh_cmnd_len, int eh_disp) | |
1367 | { | |
1368 | struct scsi_disk *sdkp = scsi_disk(scmd->request->rq_disk); | |
1369 | ||
1370 | if (!scsi_device_online(scmd->device) || | |
1371 | !scsi_medium_access_command(scmd)) | |
1372 | return eh_disp; | |
1373 | ||
1374 | /* | |
1375 | * The device has timed out executing a medium access command. | |
1376 | * However, the TEST UNIT READY command sent during error | |
1377 | * handling completed successfully. Either the device is in the | |
1378 | * process of recovering or has it suffered an internal failure | |
1379 | * that prevents access to the storage medium. | |
1380 | */ | |
1381 | if (host_byte(scmd->result) == DID_TIME_OUT && eh_disp == SUCCESS && | |
1382 | eh_cmnd_len && eh_cmnd[0] == TEST_UNIT_READY) | |
1383 | sdkp->medium_access_timed_out++; | |
1384 | ||
1385 | /* | |
1386 | * If the device keeps failing read/write commands but TEST UNIT | |
1387 | * READY always completes successfully we assume that medium | |
1388 | * access is no longer possible and take the device offline. | |
1389 | */ | |
1390 | if (sdkp->medium_access_timed_out >= sdkp->max_medium_access_timeouts) { | |
1391 | scmd_printk(KERN_ERR, scmd, | |
1392 | "Medium access timeout failure. Offlining disk!\n"); | |
1393 | scsi_device_set_state(scmd->device, SDEV_OFFLINE); | |
1394 | ||
1395 | return FAILED; | |
1396 | } | |
1397 | ||
1398 | return eh_disp; | |
1399 | } | |
1400 | ||
af55ff67 MP |
1401 | static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd) |
1402 | { | |
83096ebf TH |
1403 | u64 start_lba = blk_rq_pos(scmd->request); |
1404 | u64 end_lba = blk_rq_pos(scmd->request) + (scsi_bufflen(scmd) / 512); | |
af55ff67 MP |
1405 | u64 bad_lba; |
1406 | int info_valid; | |
a8733c7b JB |
1407 | /* |
1408 | * resid is optional but mostly filled in. When it's unused, | |
1409 | * its value is zero, so we assume the whole buffer transferred | |
1410 | */ | |
1411 | unsigned int transferred = scsi_bufflen(scmd) - scsi_get_resid(scmd); | |
1412 | unsigned int good_bytes; | |
af55ff67 | 1413 | |
33659ebb | 1414 | if (scmd->request->cmd_type != REQ_TYPE_FS) |
af55ff67 MP |
1415 | return 0; |
1416 | ||
1417 | info_valid = scsi_get_sense_info_fld(scmd->sense_buffer, | |
1418 | SCSI_SENSE_BUFFERSIZE, | |
1419 | &bad_lba); | |
1420 | if (!info_valid) | |
1421 | return 0; | |
1422 | ||
1423 | if (scsi_bufflen(scmd) <= scmd->device->sector_size) | |
1424 | return 0; | |
1425 | ||
1426 | if (scmd->device->sector_size < 512) { | |
1427 | /* only legitimate sector_size here is 256 */ | |
1428 | start_lba <<= 1; | |
1429 | end_lba <<= 1; | |
1430 | } else { | |
1431 | /* be careful ... don't want any overflows */ | |
1432 | u64 factor = scmd->device->sector_size / 512; | |
1433 | do_div(start_lba, factor); | |
1434 | do_div(end_lba, factor); | |
1435 | } | |
1436 | ||
1437 | /* The bad lba was reported incorrectly, we have no idea where | |
1438 | * the error is. | |
1439 | */ | |
1440 | if (bad_lba < start_lba || bad_lba >= end_lba) | |
1441 | return 0; | |
1442 | ||
1443 | /* This computation should always be done in terms of | |
1444 | * the resolution of the device's medium. | |
1445 | */ | |
a8733c7b JB |
1446 | good_bytes = (bad_lba - start_lba) * scmd->device->sector_size; |
1447 | return min(good_bytes, transferred); | |
af55ff67 MP |
1448 | } |
1449 | ||
1da177e4 | 1450 | /** |
7b3d9545 | 1451 | * sd_done - bottom half handler: called when the lower level |
1da177e4 LT |
1452 | * driver has completed (successfully or otherwise) a scsi command. |
1453 | * @SCpnt: mid-level's per command structure. | |
1454 | * | |
1455 | * Note: potentially run from within an ISR. Must not block. | |
1456 | **/ | |
7b3d9545 | 1457 | static int sd_done(struct scsi_cmnd *SCpnt) |
1da177e4 LT |
1458 | { |
1459 | int result = SCpnt->result; | |
af55ff67 | 1460 | unsigned int good_bytes = result ? 0 : scsi_bufflen(SCpnt); |
1da177e4 | 1461 | struct scsi_sense_hdr sshdr; |
4e7392ec | 1462 | struct scsi_disk *sdkp = scsi_disk(SCpnt->request->rq_disk); |
1da177e4 LT |
1463 | int sense_valid = 0; |
1464 | int sense_deferred = 0; | |
c98a0eb0 | 1465 | unsigned char op = SCpnt->cmnd[0]; |
1da177e4 | 1466 | |
c98a0eb0 MP |
1467 | if ((SCpnt->request->cmd_flags & REQ_DISCARD) && !result) |
1468 | scsi_set_resid(SCpnt, 0); | |
6a32a8ae | 1469 | |
1da177e4 LT |
1470 | if (result) { |
1471 | sense_valid = scsi_command_normalize_sense(SCpnt, &sshdr); | |
1472 | if (sense_valid) | |
1473 | sense_deferred = scsi_sense_is_deferred(&sshdr); | |
1474 | } | |
1da177e4 | 1475 | #ifdef CONFIG_SCSI_LOGGING |
fa0d34be | 1476 | SCSI_LOG_HLCOMPLETE(1, scsi_print_result(SCpnt)); |
1da177e4 | 1477 | if (sense_valid) { |
fa0d34be | 1478 | SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO, SCpnt, |
7b3d9545 | 1479 | "sd_done: sb[respc,sk,asc," |
fa0d34be MP |
1480 | "ascq]=%x,%x,%x,%x\n", |
1481 | sshdr.response_code, | |
1482 | sshdr.sense_key, sshdr.asc, | |
1483 | sshdr.ascq)); | |
1da177e4 LT |
1484 | } |
1485 | #endif | |
03aba2f7 LT |
1486 | if (driver_byte(result) != DRIVER_SENSE && |
1487 | (!sense_valid || sense_deferred)) | |
1488 | goto out; | |
1489 | ||
18a4d0a2 MP |
1490 | sdkp->medium_access_timed_out = 0; |
1491 | ||
03aba2f7 LT |
1492 | switch (sshdr.sense_key) { |
1493 | case HARDWARE_ERROR: | |
1494 | case MEDIUM_ERROR: | |
af55ff67 | 1495 | good_bytes = sd_completed_bytes(SCpnt); |
03aba2f7 LT |
1496 | break; |
1497 | case RECOVERED_ERROR: | |
af55ff67 MP |
1498 | good_bytes = scsi_bufflen(SCpnt); |
1499 | break; | |
10dab226 JW |
1500 | case NO_SENSE: |
1501 | /* This indicates a false check condition, so ignore it. An | |
1502 | * unknown amount of data was transferred so treat it as an | |
1503 | * error. | |
1504 | */ | |
1505 | scsi_print_sense("sd", SCpnt); | |
1506 | SCpnt->result = 0; | |
1507 | memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); | |
1508 | break; | |
c98a0eb0 MP |
1509 | case ABORTED_COMMAND: |
1510 | if (sshdr.asc == 0x10) /* DIF: Target detected corruption */ | |
1511 | good_bytes = sd_completed_bytes(SCpnt); | |
1512 | break; | |
1513 | case ILLEGAL_REQUEST: | |
1514 | if (sshdr.asc == 0x10) /* DIX: Host detected corruption */ | |
af55ff67 | 1515 | good_bytes = sd_completed_bytes(SCpnt); |
c98a0eb0 MP |
1516 | /* INVALID COMMAND OPCODE or INVALID FIELD IN CDB */ |
1517 | if ((sshdr.asc == 0x20 || sshdr.asc == 0x24) && | |
1518 | (op == UNMAP || op == WRITE_SAME_16 || op == WRITE_SAME)) | |
1519 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
03aba2f7 LT |
1520 | break; |
1521 | default: | |
1522 | break; | |
1da177e4 | 1523 | } |
03aba2f7 | 1524 | out: |
af55ff67 MP |
1525 | if (rq_data_dir(SCpnt->request) == READ && scsi_prot_sg_count(SCpnt)) |
1526 | sd_dif_complete(SCpnt, good_bytes); | |
1527 | ||
4e7392ec | 1528 | if (scsi_host_dif_capable(sdkp->device->host, sdkp->protection_type) |
77c9cfc5 MP |
1529 | == SD_DIF_TYPE2_PROTECTION && SCpnt->cmnd != SCpnt->request->cmd) { |
1530 | ||
1531 | /* We have to print a failed command here as the | |
1532 | * extended CDB gets freed before scsi_io_completion() | |
1533 | * is called. | |
1534 | */ | |
1535 | if (result) | |
1536 | scsi_print_command(SCpnt); | |
1537 | ||
4e7392ec | 1538 | mempool_free(SCpnt->cmnd, sd_cdb_pool); |
77c9cfc5 MP |
1539 | SCpnt->cmnd = NULL; |
1540 | SCpnt->cmd_len = 0; | |
1541 | } | |
4e7392ec | 1542 | |
7b3d9545 | 1543 | return good_bytes; |
1da177e4 LT |
1544 | } |
1545 | ||
1da177e4 LT |
1546 | /* |
1547 | * spinup disk - called only in sd_revalidate_disk() | |
1548 | */ | |
1549 | static void | |
e73aec82 | 1550 | sd_spinup_disk(struct scsi_disk *sdkp) |
ea73a9f2 | 1551 | { |
1da177e4 | 1552 | unsigned char cmd[10]; |
4451e472 | 1553 | unsigned long spintime_expire = 0; |
1da177e4 LT |
1554 | int retries, spintime; |
1555 | unsigned int the_result; | |
1556 | struct scsi_sense_hdr sshdr; | |
1557 | int sense_valid = 0; | |
1558 | ||
1559 | spintime = 0; | |
1560 | ||
1561 | /* Spin up drives, as required. Only do this at boot time */ | |
1562 | /* Spinup needs to be done for module loads too. */ | |
1563 | do { | |
1564 | retries = 0; | |
1565 | ||
1566 | do { | |
1567 | cmd[0] = TEST_UNIT_READY; | |
1568 | memset((void *) &cmd[1], 0, 9); | |
1569 | ||
ea73a9f2 JB |
1570 | the_result = scsi_execute_req(sdkp->device, cmd, |
1571 | DMA_NONE, NULL, 0, | |
1572 | &sshdr, SD_TIMEOUT, | |
f4f4e47e | 1573 | SD_MAX_RETRIES, NULL); |
1da177e4 | 1574 | |
b4d38e38 AS |
1575 | /* |
1576 | * If the drive has indicated to us that it | |
1577 | * doesn't have any media in it, don't bother | |
1578 | * with any more polling. | |
1579 | */ | |
1580 | if (media_not_present(sdkp, &sshdr)) | |
1581 | return; | |
1582 | ||
1da177e4 | 1583 | if (the_result) |
ea73a9f2 | 1584 | sense_valid = scsi_sense_valid(&sshdr); |
1da177e4 LT |
1585 | retries++; |
1586 | } while (retries < 3 && | |
1587 | (!scsi_status_is_good(the_result) || | |
1588 | ((driver_byte(the_result) & DRIVER_SENSE) && | |
1589 | sense_valid && sshdr.sense_key == UNIT_ATTENTION))); | |
1590 | ||
1da177e4 LT |
1591 | if ((driver_byte(the_result) & DRIVER_SENSE) == 0) { |
1592 | /* no sense, TUR either succeeded or failed | |
1593 | * with a status error */ | |
e73aec82 MP |
1594 | if(!spintime && !scsi_status_is_good(the_result)) { |
1595 | sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n"); | |
1596 | sd_print_result(sdkp, the_result); | |
1597 | } | |
1da177e4 LT |
1598 | break; |
1599 | } | |
1600 | ||
1601 | /* | |
1602 | * The device does not want the automatic start to be issued. | |
1603 | */ | |
33dd6f92 | 1604 | if (sdkp->device->no_start_on_add) |
1da177e4 | 1605 | break; |
1da177e4 | 1606 | |
33dd6f92 MW |
1607 | if (sense_valid && sshdr.sense_key == NOT_READY) { |
1608 | if (sshdr.asc == 4 && sshdr.ascq == 3) | |
1609 | break; /* manual intervention required */ | |
1610 | if (sshdr.asc == 4 && sshdr.ascq == 0xb) | |
1611 | break; /* standby */ | |
1612 | if (sshdr.asc == 4 && sshdr.ascq == 0xc) | |
1613 | break; /* unavailable */ | |
1614 | /* | |
1615 | * Issue command to spin up drive when not ready | |
1616 | */ | |
1da177e4 | 1617 | if (!spintime) { |
e73aec82 | 1618 | sd_printk(KERN_NOTICE, sdkp, "Spinning up disk..."); |
1da177e4 LT |
1619 | cmd[0] = START_STOP; |
1620 | cmd[1] = 1; /* Return immediately */ | |
1621 | memset((void *) &cmd[2], 0, 8); | |
1622 | cmd[4] = 1; /* Start spin cycle */ | |
d2886ea3 SR |
1623 | if (sdkp->device->start_stop_pwr_cond) |
1624 | cmd[4] |= 1 << 4; | |
ea73a9f2 JB |
1625 | scsi_execute_req(sdkp->device, cmd, DMA_NONE, |
1626 | NULL, 0, &sshdr, | |
f4f4e47e FT |
1627 | SD_TIMEOUT, SD_MAX_RETRIES, |
1628 | NULL); | |
4451e472 AS |
1629 | spintime_expire = jiffies + 100 * HZ; |
1630 | spintime = 1; | |
1da177e4 | 1631 | } |
1da177e4 LT |
1632 | /* Wait 1 second for next try */ |
1633 | msleep(1000); | |
1634 | printk("."); | |
4451e472 AS |
1635 | |
1636 | /* | |
1637 | * Wait for USB flash devices with slow firmware. | |
1638 | * Yes, this sense key/ASC combination shouldn't | |
1639 | * occur here. It's characteristic of these devices. | |
1640 | */ | |
1641 | } else if (sense_valid && | |
1642 | sshdr.sense_key == UNIT_ATTENTION && | |
1643 | sshdr.asc == 0x28) { | |
1644 | if (!spintime) { | |
1645 | spintime_expire = jiffies + 5 * HZ; | |
1646 | spintime = 1; | |
1647 | } | |
1648 | /* Wait 1 second for next try */ | |
1649 | msleep(1000); | |
1da177e4 LT |
1650 | } else { |
1651 | /* we don't understand the sense code, so it's | |
1652 | * probably pointless to loop */ | |
1653 | if(!spintime) { | |
e73aec82 MP |
1654 | sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n"); |
1655 | sd_print_sense_hdr(sdkp, &sshdr); | |
1da177e4 LT |
1656 | } |
1657 | break; | |
1658 | } | |
1659 | ||
4451e472 | 1660 | } while (spintime && time_before_eq(jiffies, spintime_expire)); |
1da177e4 LT |
1661 | |
1662 | if (spintime) { | |
1663 | if (scsi_status_is_good(the_result)) | |
1664 | printk("ready\n"); | |
1665 | else | |
1666 | printk("not responding...\n"); | |
1667 | } | |
1668 | } | |
1669 | ||
e0597d70 MP |
1670 | |
1671 | /* | |
1672 | * Determine whether disk supports Data Integrity Field. | |
1673 | */ | |
439d77f7 | 1674 | static void sd_read_protection_type(struct scsi_disk *sdkp, unsigned char *buffer) |
e0597d70 MP |
1675 | { |
1676 | struct scsi_device *sdp = sdkp->device; | |
1677 | u8 type; | |
1678 | ||
1679 | if (scsi_device_protection(sdp) == 0 || (buffer[12] & 1) == 0) | |
35e1a5d9 MP |
1680 | return; |
1681 | ||
1682 | type = ((buffer[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */ | |
1683 | ||
1684 | if (type == sdkp->protection_type || !sdkp->first_scan) | |
1685 | return; | |
e0597d70 | 1686 | |
be922f47 MP |
1687 | sdkp->protection_type = type; |
1688 | ||
4e7392ec | 1689 | if (type > SD_DIF_TYPE3_PROTECTION) { |
35e1a5d9 MP |
1690 | sd_printk(KERN_ERR, sdkp, "formatted with unsupported " \ |
1691 | "protection type %u. Disabling disk!\n", type); | |
1692 | sdkp->capacity = 0; | |
1693 | return; | |
e0597d70 MP |
1694 | } |
1695 | ||
35e1a5d9 MP |
1696 | if (scsi_host_dif_capable(sdp->host, type)) |
1697 | sd_printk(KERN_NOTICE, sdkp, | |
1698 | "Enabling DIF Type %u protection\n", type); | |
1699 | else | |
1700 | sd_printk(KERN_NOTICE, sdkp, | |
1701 | "Disabling DIF Type %u protection\n", type); | |
e0597d70 MP |
1702 | } |
1703 | ||
0da205e0 MW |
1704 | static void read_capacity_error(struct scsi_disk *sdkp, struct scsi_device *sdp, |
1705 | struct scsi_sense_hdr *sshdr, int sense_valid, | |
1706 | int the_result) | |
1707 | { | |
1708 | sd_print_result(sdkp, the_result); | |
1709 | if (driver_byte(the_result) & DRIVER_SENSE) | |
1710 | sd_print_sense_hdr(sdkp, sshdr); | |
1711 | else | |
1712 | sd_printk(KERN_NOTICE, sdkp, "Sense not available.\n"); | |
1713 | ||
1714 | /* | |
1715 | * Set dirty bit for removable devices if not ready - | |
1716 | * sometimes drives will not report this properly. | |
1717 | */ | |
1718 | if (sdp->removable && | |
1719 | sense_valid && sshdr->sense_key == NOT_READY) | |
2bae0093 | 1720 | set_media_not_present(sdkp); |
0da205e0 MW |
1721 | |
1722 | /* | |
1723 | * We used to set media_present to 0 here to indicate no media | |
1724 | * in the drive, but some drives fail read capacity even with | |
1725 | * media present, so we can't do that. | |
1726 | */ | |
1727 | sdkp->capacity = 0; /* unknown mapped to zero - as usual */ | |
1728 | } | |
1729 | ||
1730 | #define RC16_LEN 32 | |
1731 | #if RC16_LEN > SD_BUF_SIZE | |
1732 | #error RC16_LEN must not be more than SD_BUF_SIZE | |
1733 | #endif | |
1734 | ||
3233ac19 JB |
1735 | #define READ_CAPACITY_RETRIES_ON_RESET 10 |
1736 | ||
0da205e0 MW |
1737 | static int read_capacity_16(struct scsi_disk *sdkp, struct scsi_device *sdp, |
1738 | unsigned char *buffer) | |
ea73a9f2 | 1739 | { |
1da177e4 | 1740 | unsigned char cmd[16]; |
1da177e4 LT |
1741 | struct scsi_sense_hdr sshdr; |
1742 | int sense_valid = 0; | |
0da205e0 | 1743 | int the_result; |
3233ac19 | 1744 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
ea09bcc9 | 1745 | unsigned int alignment; |
0da205e0 MW |
1746 | unsigned long long lba; |
1747 | unsigned sector_size; | |
1da177e4 | 1748 | |
5ce524bd HG |
1749 | if (sdp->no_read_capacity_16) |
1750 | return -EINVAL; | |
1751 | ||
1da177e4 | 1752 | do { |
0da205e0 MW |
1753 | memset(cmd, 0, 16); |
1754 | cmd[0] = SERVICE_ACTION_IN; | |
1755 | cmd[1] = SAI_READ_CAPACITY_16; | |
1756 | cmd[13] = RC16_LEN; | |
1757 | memset(buffer, 0, RC16_LEN); | |
1758 | ||
ea73a9f2 | 1759 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, |
0da205e0 MW |
1760 | buffer, RC16_LEN, &sshdr, |
1761 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
1da177e4 | 1762 | |
ea73a9f2 | 1763 | if (media_not_present(sdkp, &sshdr)) |
0da205e0 | 1764 | return -ENODEV; |
1da177e4 | 1765 | |
2b301307 | 1766 | if (the_result) { |
ea73a9f2 | 1767 | sense_valid = scsi_sense_valid(&sshdr); |
2b301307 MW |
1768 | if (sense_valid && |
1769 | sshdr.sense_key == ILLEGAL_REQUEST && | |
1770 | (sshdr.asc == 0x20 || sshdr.asc == 0x24) && | |
1771 | sshdr.ascq == 0x00) | |
1772 | /* Invalid Command Operation Code or | |
1773 | * Invalid Field in CDB, just retry | |
1774 | * silently with RC10 */ | |
1775 | return -EINVAL; | |
3233ac19 JB |
1776 | if (sense_valid && |
1777 | sshdr.sense_key == UNIT_ATTENTION && | |
1778 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) | |
1779 | /* Device reset might occur several times, | |
1780 | * give it one more chance */ | |
1781 | if (--reset_retries > 0) | |
1782 | continue; | |
2b301307 | 1783 | } |
1da177e4 LT |
1784 | retries--; |
1785 | ||
1786 | } while (the_result && retries); | |
1787 | ||
0da205e0 | 1788 | if (the_result) { |
e73aec82 | 1789 | sd_printk(KERN_NOTICE, sdkp, "READ CAPACITY(16) failed\n"); |
0da205e0 MW |
1790 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); |
1791 | return -EINVAL; | |
1792 | } | |
e73aec82 | 1793 | |
8f76d151 DH |
1794 | sector_size = get_unaligned_be32(&buffer[8]); |
1795 | lba = get_unaligned_be64(&buffer[0]); | |
0da205e0 MW |
1796 | |
1797 | sd_read_protection_type(sdkp, buffer); | |
1798 | ||
1799 | if ((sizeof(sdkp->capacity) == 4) && (lba >= 0xffffffffULL)) { | |
1800 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a " | |
1801 | "kernel compiled with support for large block " | |
1802 | "devices.\n"); | |
1803 | sdkp->capacity = 0; | |
1804 | return -EOVERFLOW; | |
1805 | } | |
1806 | ||
ea09bcc9 | 1807 | /* Logical blocks per physical block exponent */ |
526f7c79 | 1808 | sdkp->physical_block_size = (1 << (buffer[13] & 0xf)) * sector_size; |
ea09bcc9 MP |
1809 | |
1810 | /* Lowest aligned logical block */ | |
1811 | alignment = ((buffer[14] & 0x3f) << 8 | buffer[15]) * sector_size; | |
1812 | blk_queue_alignment_offset(sdp->request_queue, alignment); | |
1813 | if (alignment && sdkp->first_scan) | |
1814 | sd_printk(KERN_NOTICE, sdkp, | |
1815 | "physical block alignment offset: %u\n", alignment); | |
1816 | ||
c98a0eb0 MP |
1817 | if (buffer[14] & 0x80) { /* LBPME */ |
1818 | sdkp->lbpme = 1; | |
e339c1a7 | 1819 | |
c98a0eb0 MP |
1820 | if (buffer[14] & 0x40) /* LBPRZ */ |
1821 | sdkp->lbprz = 1; | |
e339c1a7 | 1822 | |
c98a0eb0 | 1823 | sd_config_discard(sdkp, SD_LBP_WS16); |
e339c1a7 MP |
1824 | } |
1825 | ||
0da205e0 MW |
1826 | sdkp->capacity = lba + 1; |
1827 | return sector_size; | |
1828 | } | |
1829 | ||
1830 | static int read_capacity_10(struct scsi_disk *sdkp, struct scsi_device *sdp, | |
1831 | unsigned char *buffer) | |
1832 | { | |
1833 | unsigned char cmd[16]; | |
1834 | struct scsi_sense_hdr sshdr; | |
1835 | int sense_valid = 0; | |
1836 | int the_result; | |
3233ac19 | 1837 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
0da205e0 MW |
1838 | sector_t lba; |
1839 | unsigned sector_size; | |
1840 | ||
1841 | do { | |
1842 | cmd[0] = READ_CAPACITY; | |
1843 | memset(&cmd[1], 0, 9); | |
1844 | memset(buffer, 0, 8); | |
1845 | ||
1846 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, | |
1847 | buffer, 8, &sshdr, | |
1848 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
1849 | ||
1850 | if (media_not_present(sdkp, &sshdr)) | |
1851 | return -ENODEV; | |
1852 | ||
3233ac19 | 1853 | if (the_result) { |
0da205e0 | 1854 | sense_valid = scsi_sense_valid(&sshdr); |
3233ac19 JB |
1855 | if (sense_valid && |
1856 | sshdr.sense_key == UNIT_ATTENTION && | |
1857 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) | |
1858 | /* Device reset might occur several times, | |
1859 | * give it one more chance */ | |
1860 | if (--reset_retries > 0) | |
1861 | continue; | |
1862 | } | |
0da205e0 MW |
1863 | retries--; |
1864 | ||
1865 | } while (the_result && retries); | |
1866 | ||
1867 | if (the_result) { | |
1868 | sd_printk(KERN_NOTICE, sdkp, "READ CAPACITY failed\n"); | |
1869 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); | |
1870 | return -EINVAL; | |
1871 | } | |
1872 | ||
8f76d151 DH |
1873 | sector_size = get_unaligned_be32(&buffer[4]); |
1874 | lba = get_unaligned_be32(&buffer[0]); | |
0da205e0 | 1875 | |
5ce524bd HG |
1876 | if (sdp->no_read_capacity_16 && (lba == 0xffffffff)) { |
1877 | /* Some buggy (usb cardreader) devices return an lba of | |
1878 | 0xffffffff when the want to report a size of 0 (with | |
1879 | which they really mean no media is present) */ | |
1880 | sdkp->capacity = 0; | |
5cc10350 | 1881 | sdkp->physical_block_size = sector_size; |
5ce524bd HG |
1882 | return sector_size; |
1883 | } | |
1884 | ||
0da205e0 MW |
1885 | if ((sizeof(sdkp->capacity) == 4) && (lba == 0xffffffff)) { |
1886 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a " | |
1887 | "kernel compiled with support for large block " | |
1888 | "devices.\n"); | |
1889 | sdkp->capacity = 0; | |
1890 | return -EOVERFLOW; | |
1891 | } | |
1892 | ||
1893 | sdkp->capacity = lba + 1; | |
526f7c79 | 1894 | sdkp->physical_block_size = sector_size; |
0da205e0 MW |
1895 | return sector_size; |
1896 | } | |
1897 | ||
2b301307 MW |
1898 | static int sd_try_rc16_first(struct scsi_device *sdp) |
1899 | { | |
f87146bb HR |
1900 | if (sdp->host->max_cmd_len < 16) |
1901 | return 0; | |
6a0bdffa AS |
1902 | if (sdp->try_rc_10_first) |
1903 | return 0; | |
2b301307 MW |
1904 | if (sdp->scsi_level > SCSI_SPC_2) |
1905 | return 1; | |
1906 | if (scsi_device_protection(sdp)) | |
1907 | return 1; | |
1908 | return 0; | |
1909 | } | |
1910 | ||
0da205e0 MW |
1911 | /* |
1912 | * read disk capacity | |
1913 | */ | |
1914 | static void | |
1915 | sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer) | |
1916 | { | |
1917 | int sector_size; | |
1918 | struct scsi_device *sdp = sdkp->device; | |
70a9b873 | 1919 | sector_t old_capacity = sdkp->capacity; |
0da205e0 | 1920 | |
2b301307 | 1921 | if (sd_try_rc16_first(sdp)) { |
0da205e0 MW |
1922 | sector_size = read_capacity_16(sdkp, sdp, buffer); |
1923 | if (sector_size == -EOVERFLOW) | |
1da177e4 | 1924 | goto got_data; |
2b301307 MW |
1925 | if (sector_size == -ENODEV) |
1926 | return; | |
1927 | if (sector_size < 0) | |
1928 | sector_size = read_capacity_10(sdkp, sdp, buffer); | |
0da205e0 MW |
1929 | if (sector_size < 0) |
1930 | return; | |
1da177e4 | 1931 | } else { |
0da205e0 MW |
1932 | sector_size = read_capacity_10(sdkp, sdp, buffer); |
1933 | if (sector_size == -EOVERFLOW) | |
1934 | goto got_data; | |
1935 | if (sector_size < 0) | |
1936 | return; | |
1937 | if ((sizeof(sdkp->capacity) > 4) && | |
1938 | (sdkp->capacity > 0xffffffffULL)) { | |
1939 | int old_sector_size = sector_size; | |
1940 | sd_printk(KERN_NOTICE, sdkp, "Very big device. " | |
1941 | "Trying to use READ CAPACITY(16).\n"); | |
1942 | sector_size = read_capacity_16(sdkp, sdp, buffer); | |
1943 | if (sector_size < 0) { | |
1944 | sd_printk(KERN_NOTICE, sdkp, | |
1945 | "Using 0xffffffff as device size\n"); | |
1946 | sdkp->capacity = 1 + (sector_t) 0xffffffff; | |
1947 | sector_size = old_sector_size; | |
1948 | goto got_data; | |
1949 | } | |
1950 | } | |
1951 | } | |
1da177e4 | 1952 | |
5c211caa AS |
1953 | /* Some devices are known to return the total number of blocks, |
1954 | * not the highest block number. Some devices have versions | |
1955 | * which do this and others which do not. Some devices we might | |
1956 | * suspect of doing this but we don't know for certain. | |
1957 | * | |
1958 | * If we know the reported capacity is wrong, decrement it. If | |
1959 | * we can only guess, then assume the number of blocks is even | |
1960 | * (usually true but not always) and err on the side of lowering | |
1961 | * the capacity. | |
1962 | */ | |
1963 | if (sdp->fix_capacity || | |
1964 | (sdp->guess_capacity && (sdkp->capacity & 0x01))) { | |
1965 | sd_printk(KERN_INFO, sdkp, "Adjusting the sector count " | |
1966 | "from its reported value: %llu\n", | |
1967 | (unsigned long long) sdkp->capacity); | |
1da177e4 | 1968 | --sdkp->capacity; |
61bf54b7 ON |
1969 | } |
1970 | ||
1da177e4 LT |
1971 | got_data: |
1972 | if (sector_size == 0) { | |
1973 | sector_size = 512; | |
e73aec82 MP |
1974 | sd_printk(KERN_NOTICE, sdkp, "Sector size 0 reported, " |
1975 | "assuming 512.\n"); | |
1da177e4 LT |
1976 | } |
1977 | ||
1978 | if (sector_size != 512 && | |
1979 | sector_size != 1024 && | |
1980 | sector_size != 2048 && | |
1981 | sector_size != 4096 && | |
1982 | sector_size != 256) { | |
e73aec82 MP |
1983 | sd_printk(KERN_NOTICE, sdkp, "Unsupported sector size %d.\n", |
1984 | sector_size); | |
1da177e4 LT |
1985 | /* |
1986 | * The user might want to re-format the drive with | |
1987 | * a supported sectorsize. Once this happens, it | |
1988 | * would be relatively trivial to set the thing up. | |
1989 | * For this reason, we leave the thing in the table. | |
1990 | */ | |
1991 | sdkp->capacity = 0; | |
1992 | /* | |
1993 | * set a bogus sector size so the normal read/write | |
1994 | * logic in the block layer will eventually refuse any | |
1995 | * request on this device without tripping over power | |
1996 | * of two sector size assumptions | |
1997 | */ | |
1998 | sector_size = 512; | |
1999 | } | |
e1defc4f | 2000 | blk_queue_logical_block_size(sdp->request_queue, sector_size); |
7404ad3b | 2001 | |
1da177e4 | 2002 | { |
7404ad3b | 2003 | char cap_str_2[10], cap_str_10[10]; |
520a2c27 | 2004 | u64 sz = (u64)sdkp->capacity << ilog2(sector_size); |
1da177e4 | 2005 | |
7404ad3b JB |
2006 | string_get_size(sz, STRING_UNITS_2, cap_str_2, |
2007 | sizeof(cap_str_2)); | |
2008 | string_get_size(sz, STRING_UNITS_10, cap_str_10, | |
2009 | sizeof(cap_str_10)); | |
1da177e4 | 2010 | |
ea09bcc9 | 2011 | if (sdkp->first_scan || old_capacity != sdkp->capacity) { |
70a9b873 | 2012 | sd_printk(KERN_NOTICE, sdkp, |
ea09bcc9 | 2013 | "%llu %d-byte logical blocks: (%s/%s)\n", |
70a9b873 MP |
2014 | (unsigned long long)sdkp->capacity, |
2015 | sector_size, cap_str_10, cap_str_2); | |
ea09bcc9 | 2016 | |
526f7c79 | 2017 | if (sdkp->physical_block_size != sector_size) |
ea09bcc9 MP |
2018 | sd_printk(KERN_NOTICE, sdkp, |
2019 | "%u-byte physical blocks\n", | |
526f7c79 | 2020 | sdkp->physical_block_size); |
ea09bcc9 | 2021 | } |
1da177e4 LT |
2022 | } |
2023 | ||
2024 | /* Rescale capacity to 512-byte units */ | |
2025 | if (sector_size == 4096) | |
2026 | sdkp->capacity <<= 3; | |
2027 | else if (sector_size == 2048) | |
2028 | sdkp->capacity <<= 2; | |
2029 | else if (sector_size == 1024) | |
2030 | sdkp->capacity <<= 1; | |
2031 | else if (sector_size == 256) | |
2032 | sdkp->capacity >>= 1; | |
2033 | ||
526f7c79 MP |
2034 | blk_queue_physical_block_size(sdp->request_queue, |
2035 | sdkp->physical_block_size); | |
1da177e4 LT |
2036 | sdkp->device->sector_size = sector_size; |
2037 | } | |
2038 | ||
2039 | /* called with buffer of length 512 */ | |
2040 | static inline int | |
ea73a9f2 JB |
2041 | sd_do_mode_sense(struct scsi_device *sdp, int dbd, int modepage, |
2042 | unsigned char *buffer, int len, struct scsi_mode_data *data, | |
2043 | struct scsi_sense_hdr *sshdr) | |
1da177e4 | 2044 | { |
ea73a9f2 | 2045 | return scsi_mode_sense(sdp, dbd, modepage, buffer, len, |
1cf72699 | 2046 | SD_TIMEOUT, SD_MAX_RETRIES, data, |
ea73a9f2 | 2047 | sshdr); |
1da177e4 LT |
2048 | } |
2049 | ||
2050 | /* | |
2051 | * read write protect setting, if possible - called only in sd_revalidate_disk() | |
48970800 | 2052 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
2053 | */ |
2054 | static void | |
e73aec82 | 2055 | sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer) |
ea73a9f2 | 2056 | { |
1da177e4 | 2057 | int res; |
ea73a9f2 | 2058 | struct scsi_device *sdp = sdkp->device; |
1da177e4 | 2059 | struct scsi_mode_data data; |
70a9b873 | 2060 | int old_wp = sdkp->write_prot; |
1da177e4 LT |
2061 | |
2062 | set_disk_ro(sdkp->disk, 0); | |
ea73a9f2 | 2063 | if (sdp->skip_ms_page_3f) { |
e73aec82 | 2064 | sd_printk(KERN_NOTICE, sdkp, "Assuming Write Enabled\n"); |
1da177e4 LT |
2065 | return; |
2066 | } | |
2067 | ||
ea73a9f2 JB |
2068 | if (sdp->use_192_bytes_for_3f) { |
2069 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 192, &data, NULL); | |
1da177e4 LT |
2070 | } else { |
2071 | /* | |
2072 | * First attempt: ask for all pages (0x3F), but only 4 bytes. | |
2073 | * We have to start carefully: some devices hang if we ask | |
2074 | * for more than is available. | |
2075 | */ | |
ea73a9f2 | 2076 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 4, &data, NULL); |
1da177e4 LT |
2077 | |
2078 | /* | |
2079 | * Second attempt: ask for page 0 When only page 0 is | |
2080 | * implemented, a request for page 3F may return Sense Key | |
2081 | * 5: Illegal Request, Sense Code 24: Invalid field in | |
2082 | * CDB. | |
2083 | */ | |
2084 | if (!scsi_status_is_good(res)) | |
ea73a9f2 | 2085 | res = sd_do_mode_sense(sdp, 0, 0, buffer, 4, &data, NULL); |
1da177e4 LT |
2086 | |
2087 | /* | |
2088 | * Third attempt: ask 255 bytes, as we did earlier. | |
2089 | */ | |
2090 | if (!scsi_status_is_good(res)) | |
ea73a9f2 JB |
2091 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 255, |
2092 | &data, NULL); | |
1da177e4 LT |
2093 | } |
2094 | ||
2095 | if (!scsi_status_is_good(res)) { | |
e73aec82 MP |
2096 | sd_printk(KERN_WARNING, sdkp, |
2097 | "Test WP failed, assume Write Enabled\n"); | |
1da177e4 LT |
2098 | } else { |
2099 | sdkp->write_prot = ((data.device_specific & 0x80) != 0); | |
2100 | set_disk_ro(sdkp->disk, sdkp->write_prot); | |
70a9b873 MP |
2101 | if (sdkp->first_scan || old_wp != sdkp->write_prot) { |
2102 | sd_printk(KERN_NOTICE, sdkp, "Write Protect is %s\n", | |
2103 | sdkp->write_prot ? "on" : "off"); | |
2104 | sd_printk(KERN_DEBUG, sdkp, | |
2105 | "Mode Sense: %02x %02x %02x %02x\n", | |
2106 | buffer[0], buffer[1], buffer[2], buffer[3]); | |
2107 | } | |
1da177e4 LT |
2108 | } |
2109 | } | |
2110 | ||
2111 | /* | |
2112 | * sd_read_cache_type - called only from sd_revalidate_disk() | |
48970800 | 2113 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
2114 | */ |
2115 | static void | |
e73aec82 | 2116 | sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer) |
631e8a13 | 2117 | { |
1da177e4 | 2118 | int len = 0, res; |
ea73a9f2 | 2119 | struct scsi_device *sdp = sdkp->device; |
1da177e4 | 2120 | |
631e8a13 AV |
2121 | int dbd; |
2122 | int modepage; | |
0bcaa111 | 2123 | int first_len; |
1da177e4 LT |
2124 | struct scsi_mode_data data; |
2125 | struct scsi_sense_hdr sshdr; | |
70a9b873 MP |
2126 | int old_wce = sdkp->WCE; |
2127 | int old_rcd = sdkp->RCD; | |
2128 | int old_dpofua = sdkp->DPOFUA; | |
1da177e4 | 2129 | |
0bcaa111 LT |
2130 | first_len = 4; |
2131 | if (sdp->skip_ms_page_8) { | |
2132 | if (sdp->type == TYPE_RBC) | |
2133 | goto defaults; | |
2134 | else { | |
2135 | if (sdp->skip_ms_page_3f) | |
2136 | goto defaults; | |
2137 | modepage = 0x3F; | |
2138 | if (sdp->use_192_bytes_for_3f) | |
2139 | first_len = 192; | |
2140 | dbd = 0; | |
2141 | } | |
2142 | } else if (sdp->type == TYPE_RBC) { | |
631e8a13 AV |
2143 | modepage = 6; |
2144 | dbd = 8; | |
2145 | } else { | |
2146 | modepage = 8; | |
2147 | dbd = 0; | |
2148 | } | |
2149 | ||
1da177e4 | 2150 | /* cautiously ask */ |
0bcaa111 LT |
2151 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, first_len, |
2152 | &data, &sshdr); | |
1da177e4 LT |
2153 | |
2154 | if (!scsi_status_is_good(res)) | |
2155 | goto bad_sense; | |
2156 | ||
6d73c851 AV |
2157 | if (!data.header_length) { |
2158 | modepage = 6; | |
0bcaa111 | 2159 | first_len = 0; |
e73aec82 | 2160 | sd_printk(KERN_ERR, sdkp, "Missing header in MODE_SENSE response\n"); |
6d73c851 AV |
2161 | } |
2162 | ||
1da177e4 LT |
2163 | /* that went OK, now ask for the proper length */ |
2164 | len = data.length; | |
2165 | ||
2166 | /* | |
2167 | * We're only interested in the first three bytes, actually. | |
2168 | * But the data cache page is defined for the first 20. | |
2169 | */ | |
2170 | if (len < 3) | |
2171 | goto bad_sense; | |
0bcaa111 LT |
2172 | else if (len > SD_BUF_SIZE) { |
2173 | sd_printk(KERN_NOTICE, sdkp, "Truncating mode parameter " | |
2174 | "data from %d to %d bytes\n", len, SD_BUF_SIZE); | |
2175 | len = SD_BUF_SIZE; | |
2176 | } | |
2177 | if (modepage == 0x3F && sdp->use_192_bytes_for_3f) | |
2178 | len = 192; | |
1da177e4 LT |
2179 | |
2180 | /* Get the data */ | |
0bcaa111 LT |
2181 | if (len > first_len) |
2182 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, len, | |
2183 | &data, &sshdr); | |
1da177e4 LT |
2184 | |
2185 | if (scsi_status_is_good(res)) { | |
631e8a13 | 2186 | int offset = data.header_length + data.block_descriptor_length; |
1da177e4 | 2187 | |
0bcaa111 LT |
2188 | while (offset < len) { |
2189 | u8 page_code = buffer[offset] & 0x3F; | |
2190 | u8 spf = buffer[offset] & 0x40; | |
2191 | ||
2192 | if (page_code == 8 || page_code == 6) { | |
2193 | /* We're interested only in the first 3 bytes. | |
2194 | */ | |
2195 | if (len - offset <= 2) { | |
2196 | sd_printk(KERN_ERR, sdkp, "Incomplete " | |
2197 | "mode parameter data\n"); | |
2198 | goto defaults; | |
2199 | } else { | |
2200 | modepage = page_code; | |
2201 | goto Page_found; | |
2202 | } | |
2203 | } else { | |
2204 | /* Go to the next page */ | |
2205 | if (spf && len - offset > 3) | |
2206 | offset += 4 + (buffer[offset+2] << 8) + | |
2207 | buffer[offset+3]; | |
2208 | else if (!spf && len - offset > 1) | |
2209 | offset += 2 + buffer[offset+1]; | |
2210 | else { | |
2211 | sd_printk(KERN_ERR, sdkp, "Incomplete " | |
2212 | "mode parameter data\n"); | |
2213 | goto defaults; | |
2214 | } | |
2215 | } | |
48970800 AV |
2216 | } |
2217 | ||
0bcaa111 LT |
2218 | if (modepage == 0x3F) { |
2219 | sd_printk(KERN_ERR, sdkp, "No Caching mode page " | |
2220 | "present\n"); | |
2221 | goto defaults; | |
2222 | } else if ((buffer[offset] & 0x3f) != modepage) { | |
e73aec82 | 2223 | sd_printk(KERN_ERR, sdkp, "Got wrong page\n"); |
631e8a13 AV |
2224 | goto defaults; |
2225 | } | |
0bcaa111 | 2226 | Page_found: |
631e8a13 AV |
2227 | if (modepage == 8) { |
2228 | sdkp->WCE = ((buffer[offset + 2] & 0x04) != 0); | |
2229 | sdkp->RCD = ((buffer[offset + 2] & 0x01) != 0); | |
2230 | } else { | |
2231 | sdkp->WCE = ((buffer[offset + 2] & 0x01) == 0); | |
2232 | sdkp->RCD = 0; | |
2233 | } | |
1da177e4 | 2234 | |
007365ad TH |
2235 | sdkp->DPOFUA = (data.device_specific & 0x10) != 0; |
2236 | if (sdkp->DPOFUA && !sdkp->device->use_10_for_rw) { | |
e73aec82 MP |
2237 | sd_printk(KERN_NOTICE, sdkp, |
2238 | "Uses READ/WRITE(6), disabling FUA\n"); | |
007365ad TH |
2239 | sdkp->DPOFUA = 0; |
2240 | } | |
2241 | ||
70a9b873 MP |
2242 | if (sdkp->first_scan || old_wce != sdkp->WCE || |
2243 | old_rcd != sdkp->RCD || old_dpofua != sdkp->DPOFUA) | |
2244 | sd_printk(KERN_NOTICE, sdkp, | |
2245 | "Write cache: %s, read cache: %s, %s\n", | |
2246 | sdkp->WCE ? "enabled" : "disabled", | |
2247 | sdkp->RCD ? "disabled" : "enabled", | |
2248 | sdkp->DPOFUA ? "supports DPO and FUA" | |
2249 | : "doesn't support DPO or FUA"); | |
1da177e4 LT |
2250 | |
2251 | return; | |
2252 | } | |
2253 | ||
2254 | bad_sense: | |
ea73a9f2 | 2255 | if (scsi_sense_valid(&sshdr) && |
1da177e4 LT |
2256 | sshdr.sense_key == ILLEGAL_REQUEST && |
2257 | sshdr.asc == 0x24 && sshdr.ascq == 0x0) | |
e73aec82 MP |
2258 | /* Invalid field in CDB */ |
2259 | sd_printk(KERN_NOTICE, sdkp, "Cache data unavailable\n"); | |
1da177e4 | 2260 | else |
e73aec82 | 2261 | sd_printk(KERN_ERR, sdkp, "Asking for cache data failed\n"); |
1da177e4 LT |
2262 | |
2263 | defaults: | |
e73aec82 | 2264 | sd_printk(KERN_ERR, sdkp, "Assuming drive cache: write through\n"); |
1da177e4 LT |
2265 | sdkp->WCE = 0; |
2266 | sdkp->RCD = 0; | |
48970800 | 2267 | sdkp->DPOFUA = 0; |
1da177e4 LT |
2268 | } |
2269 | ||
e0597d70 MP |
2270 | /* |
2271 | * The ATO bit indicates whether the DIF application tag is available | |
2272 | * for use by the operating system. | |
2273 | */ | |
439d77f7 | 2274 | static void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer) |
e0597d70 MP |
2275 | { |
2276 | int res, offset; | |
2277 | struct scsi_device *sdp = sdkp->device; | |
2278 | struct scsi_mode_data data; | |
2279 | struct scsi_sense_hdr sshdr; | |
2280 | ||
2281 | if (sdp->type != TYPE_DISK) | |
2282 | return; | |
2283 | ||
2284 | if (sdkp->protection_type == 0) | |
2285 | return; | |
2286 | ||
2287 | res = scsi_mode_sense(sdp, 1, 0x0a, buffer, 36, SD_TIMEOUT, | |
2288 | SD_MAX_RETRIES, &data, &sshdr); | |
2289 | ||
2290 | if (!scsi_status_is_good(res) || !data.header_length || | |
2291 | data.length < 6) { | |
2292 | sd_printk(KERN_WARNING, sdkp, | |
2293 | "getting Control mode page failed, assume no ATO\n"); | |
2294 | ||
2295 | if (scsi_sense_valid(&sshdr)) | |
2296 | sd_print_sense_hdr(sdkp, &sshdr); | |
2297 | ||
2298 | return; | |
2299 | } | |
2300 | ||
2301 | offset = data.header_length + data.block_descriptor_length; | |
2302 | ||
2303 | if ((buffer[offset] & 0x3f) != 0x0a) { | |
2304 | sd_printk(KERN_ERR, sdkp, "ATO Got wrong page\n"); | |
2305 | return; | |
2306 | } | |
2307 | ||
2308 | if ((buffer[offset + 5] & 0x80) == 0) | |
2309 | return; | |
2310 | ||
2311 | sdkp->ATO = 1; | |
2312 | ||
2313 | return; | |
2314 | } | |
2315 | ||
d11b6916 MP |
2316 | /** |
2317 | * sd_read_block_limits - Query disk device for preferred I/O sizes. | |
2318 | * @disk: disk to query | |
2319 | */ | |
2320 | static void sd_read_block_limits(struct scsi_disk *sdkp) | |
2321 | { | |
2322 | unsigned int sector_sz = sdkp->device->sector_size; | |
bb2d3de1 | 2323 | const int vpd_len = 64; |
e3deec09 | 2324 | unsigned char *buffer = kmalloc(vpd_len, GFP_KERNEL); |
d11b6916 | 2325 | |
e3deec09 JB |
2326 | if (!buffer || |
2327 | /* Block Limits VPD */ | |
2328 | scsi_get_vpd_page(sdkp->device, 0xb0, buffer, vpd_len)) | |
2329 | goto out; | |
d11b6916 MP |
2330 | |
2331 | blk_queue_io_min(sdkp->disk->queue, | |
2332 | get_unaligned_be16(&buffer[6]) * sector_sz); | |
2333 | blk_queue_io_opt(sdkp->disk->queue, | |
2334 | get_unaligned_be32(&buffer[12]) * sector_sz); | |
2335 | ||
c98a0eb0 MP |
2336 | if (buffer[3] == 0x3c) { |
2337 | unsigned int lba_count, desc_count; | |
e339c1a7 | 2338 | |
c98a0eb0 MP |
2339 | sdkp->max_ws_blocks = |
2340 | (u32) min_not_zero(get_unaligned_be64(&buffer[36]), | |
2341 | (u64)0xffffffff); | |
e339c1a7 | 2342 | |
c98a0eb0 | 2343 | if (!sdkp->lbpme) |
045d3fe7 | 2344 | goto out; |
045d3fe7 | 2345 | |
c98a0eb0 MP |
2346 | lba_count = get_unaligned_be32(&buffer[20]); |
2347 | desc_count = get_unaligned_be32(&buffer[24]); | |
045d3fe7 | 2348 | |
c98a0eb0 MP |
2349 | if (lba_count && desc_count) |
2350 | sdkp->max_unmap_blocks = lba_count; | |
e339c1a7 | 2351 | |
c98a0eb0 | 2352 | sdkp->unmap_granularity = get_unaligned_be32(&buffer[28]); |
e339c1a7 MP |
2353 | |
2354 | if (buffer[32] & 0x80) | |
c98a0eb0 | 2355 | sdkp->unmap_alignment = |
e339c1a7 | 2356 | get_unaligned_be32(&buffer[32]) & ~(1 << 31); |
c98a0eb0 MP |
2357 | |
2358 | if (!sdkp->lbpvpd) { /* LBP VPD page not provided */ | |
2359 | ||
2360 | if (sdkp->max_unmap_blocks) | |
2361 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
2362 | else | |
2363 | sd_config_discard(sdkp, SD_LBP_WS16); | |
2364 | ||
2365 | } else { /* LBP VPD page tells us what to use */ | |
2366 | ||
2367 | if (sdkp->lbpu && sdkp->max_unmap_blocks) | |
2368 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
2369 | else if (sdkp->lbpws) | |
2370 | sd_config_discard(sdkp, SD_LBP_WS16); | |
2371 | else if (sdkp->lbpws10) | |
2372 | sd_config_discard(sdkp, SD_LBP_WS10); | |
2373 | else | |
2374 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
2375 | } | |
e339c1a7 MP |
2376 | } |
2377 | ||
e3deec09 | 2378 | out: |
d11b6916 MP |
2379 | kfree(buffer); |
2380 | } | |
2381 | ||
3821d768 MP |
2382 | /** |
2383 | * sd_read_block_characteristics - Query block dev. characteristics | |
2384 | * @disk: disk to query | |
2385 | */ | |
2386 | static void sd_read_block_characteristics(struct scsi_disk *sdkp) | |
2387 | { | |
e3deec09 | 2388 | unsigned char *buffer; |
3821d768 | 2389 | u16 rot; |
bb2d3de1 | 2390 | const int vpd_len = 64; |
3821d768 | 2391 | |
e3deec09 | 2392 | buffer = kmalloc(vpd_len, GFP_KERNEL); |
3821d768 | 2393 | |
e3deec09 JB |
2394 | if (!buffer || |
2395 | /* Block Device Characteristics VPD */ | |
2396 | scsi_get_vpd_page(sdkp->device, 0xb1, buffer, vpd_len)) | |
2397 | goto out; | |
3821d768 MP |
2398 | |
2399 | rot = get_unaligned_be16(&buffer[4]); | |
2400 | ||
2401 | if (rot == 1) | |
2402 | queue_flag_set_unlocked(QUEUE_FLAG_NONROT, sdkp->disk->queue); | |
2403 | ||
e3deec09 | 2404 | out: |
3821d768 MP |
2405 | kfree(buffer); |
2406 | } | |
2407 | ||
045d3fe7 | 2408 | /** |
c98a0eb0 | 2409 | * sd_read_block_provisioning - Query provisioning VPD page |
045d3fe7 MP |
2410 | * @disk: disk to query |
2411 | */ | |
c98a0eb0 | 2412 | static void sd_read_block_provisioning(struct scsi_disk *sdkp) |
045d3fe7 MP |
2413 | { |
2414 | unsigned char *buffer; | |
2415 | const int vpd_len = 8; | |
2416 | ||
c98a0eb0 | 2417 | if (sdkp->lbpme == 0) |
045d3fe7 MP |
2418 | return; |
2419 | ||
2420 | buffer = kmalloc(vpd_len, GFP_KERNEL); | |
2421 | ||
2422 | if (!buffer || scsi_get_vpd_page(sdkp->device, 0xb2, buffer, vpd_len)) | |
2423 | goto out; | |
2424 | ||
c98a0eb0 MP |
2425 | sdkp->lbpvpd = 1; |
2426 | sdkp->lbpu = (buffer[5] >> 7) & 1; /* UNMAP */ | |
2427 | sdkp->lbpws = (buffer[5] >> 6) & 1; /* WRITE SAME(16) with UNMAP */ | |
2428 | sdkp->lbpws10 = (buffer[5] >> 5) & 1; /* WRITE SAME(10) with UNMAP */ | |
045d3fe7 MP |
2429 | |
2430 | out: | |
2431 | kfree(buffer); | |
2432 | } | |
2433 | ||
ffd4bc2a MP |
2434 | static int sd_try_extended_inquiry(struct scsi_device *sdp) |
2435 | { | |
2436 | /* | |
2437 | * Although VPD inquiries can go to SCSI-2 type devices, | |
2438 | * some USB ones crash on receiving them, and the pages | |
2439 | * we currently ask for are for SPC-3 and beyond | |
2440 | */ | |
09b6b51b | 2441 | if (sdp->scsi_level > SCSI_SPC_2 && !sdp->skip_vpd_pages) |
ffd4bc2a MP |
2442 | return 1; |
2443 | return 0; | |
2444 | } | |
2445 | ||
1da177e4 LT |
2446 | /** |
2447 | * sd_revalidate_disk - called the first time a new disk is seen, | |
2448 | * performs disk spin up, read_capacity, etc. | |
2449 | * @disk: struct gendisk we care about | |
2450 | **/ | |
2451 | static int sd_revalidate_disk(struct gendisk *disk) | |
2452 | { | |
2453 | struct scsi_disk *sdkp = scsi_disk(disk); | |
2454 | struct scsi_device *sdp = sdkp->device; | |
1da177e4 | 2455 | unsigned char *buffer; |
4913efe4 | 2456 | unsigned flush = 0; |
1da177e4 | 2457 | |
fa0d34be MP |
2458 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, |
2459 | "sd_revalidate_disk\n")); | |
1da177e4 LT |
2460 | |
2461 | /* | |
2462 | * If the device is offline, don't try and read capacity or any | |
2463 | * of the other niceties. | |
2464 | */ | |
2465 | if (!scsi_device_online(sdp)) | |
2466 | goto out; | |
2467 | ||
a6123f14 | 2468 | buffer = kmalloc(SD_BUF_SIZE, GFP_KERNEL); |
1da177e4 | 2469 | if (!buffer) { |
e73aec82 MP |
2470 | sd_printk(KERN_WARNING, sdkp, "sd_revalidate_disk: Memory " |
2471 | "allocation failure.\n"); | |
ea73a9f2 | 2472 | goto out; |
1da177e4 LT |
2473 | } |
2474 | ||
e73aec82 | 2475 | sd_spinup_disk(sdkp); |
1da177e4 LT |
2476 | |
2477 | /* | |
2478 | * Without media there is no reason to ask; moreover, some devices | |
2479 | * react badly if we do. | |
2480 | */ | |
2481 | if (sdkp->media_present) { | |
e73aec82 | 2482 | sd_read_capacity(sdkp, buffer); |
ffd4bc2a MP |
2483 | |
2484 | if (sd_try_extended_inquiry(sdp)) { | |
c98a0eb0 | 2485 | sd_read_block_provisioning(sdkp); |
ffd4bc2a MP |
2486 | sd_read_block_limits(sdkp); |
2487 | sd_read_block_characteristics(sdkp); | |
2488 | } | |
2489 | ||
e73aec82 MP |
2490 | sd_read_write_protect_flag(sdkp, buffer); |
2491 | sd_read_cache_type(sdkp, buffer); | |
e0597d70 | 2492 | sd_read_app_tag_own(sdkp, buffer); |
1da177e4 | 2493 | } |
461d4e90 | 2494 | |
70a9b873 MP |
2495 | sdkp->first_scan = 0; |
2496 | ||
461d4e90 TH |
2497 | /* |
2498 | * We now have all cache related info, determine how we deal | |
4913efe4 | 2499 | * with flush requests. |
461d4e90 | 2500 | */ |
4913efe4 TH |
2501 | if (sdkp->WCE) { |
2502 | flush |= REQ_FLUSH; | |
2503 | if (sdkp->DPOFUA) | |
2504 | flush |= REQ_FUA; | |
2505 | } | |
461d4e90 | 2506 | |
4913efe4 | 2507 | blk_queue_flush(sdkp->disk->queue, flush); |
461d4e90 | 2508 | |
1da177e4 LT |
2509 | set_capacity(disk, sdkp->capacity); |
2510 | kfree(buffer); | |
2511 | ||
1da177e4 LT |
2512 | out: |
2513 | return 0; | |
2514 | } | |
2515 | ||
72ec24bd TH |
2516 | /** |
2517 | * sd_unlock_native_capacity - unlock native capacity | |
2518 | * @disk: struct gendisk to set capacity for | |
2519 | * | |
2520 | * Block layer calls this function if it detects that partitions | |
2521 | * on @disk reach beyond the end of the device. If the SCSI host | |
2522 | * implements ->unlock_native_capacity() method, it's invoked to | |
2523 | * give it a chance to adjust the device capacity. | |
2524 | * | |
2525 | * CONTEXT: | |
2526 | * Defined by block layer. Might sleep. | |
2527 | */ | |
2528 | static void sd_unlock_native_capacity(struct gendisk *disk) | |
2529 | { | |
2530 | struct scsi_device *sdev = scsi_disk(disk)->device; | |
2531 | ||
2532 | if (sdev->host->hostt->unlock_native_capacity) | |
2533 | sdev->host->hostt->unlock_native_capacity(sdev); | |
2534 | } | |
2535 | ||
3e1a7ff8 TH |
2536 | /** |
2537 | * sd_format_disk_name - format disk name | |
2538 | * @prefix: name prefix - ie. "sd" for SCSI disks | |
2539 | * @index: index of the disk to format name for | |
2540 | * @buf: output buffer | |
2541 | * @buflen: length of the output buffer | |
2542 | * | |
2543 | * SCSI disk names starts at sda. The 26th device is sdz and the | |
2544 | * 27th is sdaa. The last one for two lettered suffix is sdzz | |
2545 | * which is followed by sdaaa. | |
2546 | * | |
2547 | * This is basically 26 base counting with one extra 'nil' entry | |
3ad2f3fb | 2548 | * at the beginning from the second digit on and can be |
3e1a7ff8 TH |
2549 | * determined using similar method as 26 base conversion with the |
2550 | * index shifted -1 after each digit is computed. | |
2551 | * | |
2552 | * CONTEXT: | |
2553 | * Don't care. | |
2554 | * | |
2555 | * RETURNS: | |
2556 | * 0 on success, -errno on failure. | |
2557 | */ | |
2558 | static int sd_format_disk_name(char *prefix, int index, char *buf, int buflen) | |
2559 | { | |
2560 | const int base = 'z' - 'a' + 1; | |
2561 | char *begin = buf + strlen(prefix); | |
2562 | char *end = buf + buflen; | |
2563 | char *p; | |
2564 | int unit; | |
2565 | ||
2566 | p = end - 1; | |
2567 | *p = '\0'; | |
2568 | unit = base; | |
2569 | do { | |
2570 | if (p == begin) | |
2571 | return -EINVAL; | |
2572 | *--p = 'a' + (index % unit); | |
2573 | index = (index / unit) - 1; | |
2574 | } while (index >= 0); | |
2575 | ||
2576 | memmove(begin, p, end - p); | |
2577 | memcpy(buf, prefix, strlen(prefix)); | |
2578 | ||
2579 | return 0; | |
2580 | } | |
2581 | ||
4ace92fc AV |
2582 | /* |
2583 | * The asynchronous part of sd_probe | |
2584 | */ | |
2585 | static void sd_probe_async(void *data, async_cookie_t cookie) | |
2586 | { | |
2587 | struct scsi_disk *sdkp = data; | |
2588 | struct scsi_device *sdp; | |
2589 | struct gendisk *gd; | |
2590 | u32 index; | |
2591 | struct device *dev; | |
2592 | ||
2593 | sdp = sdkp->device; | |
2594 | gd = sdkp->disk; | |
2595 | index = sdkp->index; | |
2596 | dev = &sdp->sdev_gendev; | |
2597 | ||
1a03ae0f MR |
2598 | gd->major = sd_major((index & 0xf0) >> 4); |
2599 | gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00); | |
2600 | gd->minors = SD_MINORS; | |
2601 | ||
4ace92fc AV |
2602 | gd->fops = &sd_fops; |
2603 | gd->private_data = &sdkp->driver; | |
2604 | gd->queue = sdkp->device->request_queue; | |
2605 | ||
70a9b873 MP |
2606 | /* defaults, until the device tells us otherwise */ |
2607 | sdp->sector_size = 512; | |
2608 | sdkp->capacity = 0; | |
2609 | sdkp->media_present = 1; | |
2610 | sdkp->write_prot = 0; | |
2611 | sdkp->WCE = 0; | |
2612 | sdkp->RCD = 0; | |
2613 | sdkp->ATO = 0; | |
2614 | sdkp->first_scan = 1; | |
18a4d0a2 | 2615 | sdkp->max_medium_access_timeouts = SD_MAX_MEDIUM_TIMEOUTS; |
70a9b873 | 2616 | |
4ace92fc AV |
2617 | sd_revalidate_disk(gd); |
2618 | ||
2619 | blk_queue_prep_rq(sdp->request_queue, sd_prep_fn); | |
f1126e95 | 2620 | blk_queue_unprep_rq(sdp->request_queue, sd_unprep_fn); |
4ace92fc AV |
2621 | |
2622 | gd->driverfs_dev = &sdp->sdev_gendev; | |
97fedbbe | 2623 | gd->flags = GENHD_FL_EXT_DEVT; |
2bae0093 | 2624 | if (sdp->removable) { |
4ace92fc | 2625 | gd->flags |= GENHD_FL_REMOVABLE; |
2bae0093 TH |
2626 | gd->events |= DISK_EVENT_MEDIA_CHANGE; |
2627 | } | |
4ace92fc | 2628 | |
4ace92fc AV |
2629 | add_disk(gd); |
2630 | sd_dif_config_host(sdkp); | |
2631 | ||
3821d768 MP |
2632 | sd_revalidate_disk(gd); |
2633 | ||
4ace92fc AV |
2634 | sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n", |
2635 | sdp->removable ? "removable " : ""); | |
478a8a05 | 2636 | scsi_autopm_put_device(sdp); |
ea038f63 | 2637 | put_device(&sdkp->dev); |
4ace92fc AV |
2638 | } |
2639 | ||
1da177e4 LT |
2640 | /** |
2641 | * sd_probe - called during driver initialization and whenever a | |
2642 | * new scsi device is attached to the system. It is called once | |
2643 | * for each scsi device (not just disks) present. | |
2644 | * @dev: pointer to device object | |
2645 | * | |
2646 | * Returns 0 if successful (or not interested in this scsi device | |
2647 | * (e.g. scanner)); 1 when there is an error. | |
2648 | * | |
2649 | * Note: this function is invoked from the scsi mid-level. | |
2650 | * This function sets up the mapping between a given | |
2651 | * <host,channel,id,lun> (found in sdp) and new device name | |
2652 | * (e.g. /dev/sda). More precisely it is the block device major | |
2653 | * and minor number that is chosen here. | |
2654 | * | |
2db93ce8 PU |
2655 | * Assume sd_probe is not re-entrant (for time being) |
2656 | * Also think about sd_probe() and sd_remove() running coincidentally. | |
1da177e4 LT |
2657 | **/ |
2658 | static int sd_probe(struct device *dev) | |
2659 | { | |
2660 | struct scsi_device *sdp = to_scsi_device(dev); | |
2661 | struct scsi_disk *sdkp; | |
2662 | struct gendisk *gd; | |
439d77f7 | 2663 | int index; |
1da177e4 LT |
2664 | int error; |
2665 | ||
2666 | error = -ENODEV; | |
631e8a13 | 2667 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_MOD && sdp->type != TYPE_RBC) |
1da177e4 LT |
2668 | goto out; |
2669 | ||
9ccfc756 | 2670 | SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO, sdp, |
2db93ce8 | 2671 | "sd_probe\n")); |
1da177e4 LT |
2672 | |
2673 | error = -ENOMEM; | |
24669f75 | 2674 | sdkp = kzalloc(sizeof(*sdkp), GFP_KERNEL); |
1da177e4 LT |
2675 | if (!sdkp) |
2676 | goto out; | |
2677 | ||
689d6fac | 2678 | gd = alloc_disk(SD_MINORS); |
1da177e4 LT |
2679 | if (!gd) |
2680 | goto out_free; | |
2681 | ||
f27bac27 TH |
2682 | do { |
2683 | if (!ida_pre_get(&sd_index_ida, GFP_KERNEL)) | |
2684 | goto out_put; | |
1da177e4 | 2685 | |
4034cc68 | 2686 | spin_lock(&sd_index_lock); |
f27bac27 | 2687 | error = ida_get_new(&sd_index_ida, &index); |
4034cc68 | 2688 | spin_unlock(&sd_index_lock); |
f27bac27 | 2689 | } while (error == -EAGAIN); |
1da177e4 | 2690 | |
21208ae5 DK |
2691 | if (error) { |
2692 | sdev_printk(KERN_WARNING, sdp, "sd_probe: memory exhausted.\n"); | |
1da177e4 | 2693 | goto out_put; |
1a03ae0f MR |
2694 | } |
2695 | ||
3e1a7ff8 | 2696 | error = sd_format_disk_name("sd", index, gd->disk_name, DISK_NAME_LEN); |
21208ae5 DK |
2697 | if (error) { |
2698 | sdev_printk(KERN_WARNING, sdp, "SCSI disk (sd) name length exceeded.\n"); | |
f27bac27 | 2699 | goto out_free_index; |
21208ae5 | 2700 | } |
f27bac27 | 2701 | |
1da177e4 LT |
2702 | sdkp->device = sdp; |
2703 | sdkp->driver = &sd_template; | |
2704 | sdkp->disk = gd; | |
2705 | sdkp->index = index; | |
409f3499 | 2706 | atomic_set(&sdkp->openers, 0); |
9e1a1537 | 2707 | atomic_set(&sdkp->device->ioerr_cnt, 0); |
1da177e4 | 2708 | |
601e7638 JB |
2709 | if (!sdp->request_queue->rq_timeout) { |
2710 | if (sdp->type != TYPE_MOD) | |
2711 | blk_queue_rq_timeout(sdp->request_queue, SD_TIMEOUT); | |
2712 | else | |
2713 | blk_queue_rq_timeout(sdp->request_queue, | |
2714 | SD_MOD_TIMEOUT); | |
2715 | } | |
2716 | ||
2717 | device_initialize(&sdkp->dev); | |
478a8a05 | 2718 | sdkp->dev.parent = dev; |
601e7638 | 2719 | sdkp->dev.class = &sd_disk_class; |
478a8a05 | 2720 | dev_set_name(&sdkp->dev, dev_name(dev)); |
601e7638 JB |
2721 | |
2722 | if (device_add(&sdkp->dev)) | |
2723 | goto out_free_index; | |
2724 | ||
478a8a05 AS |
2725 | get_device(dev); |
2726 | dev_set_drvdata(dev, sdkp); | |
601e7638 | 2727 | |
ea038f63 | 2728 | get_device(&sdkp->dev); /* prevent release before async_schedule */ |
a7a20d10 | 2729 | async_schedule_domain(sd_probe_async, sdkp, &scsi_sd_probe_domain); |
1da177e4 LT |
2730 | |
2731 | return 0; | |
2732 | ||
f27bac27 | 2733 | out_free_index: |
4034cc68 | 2734 | spin_lock(&sd_index_lock); |
f27bac27 | 2735 | ida_remove(&sd_index_ida, index); |
4034cc68 | 2736 | spin_unlock(&sd_index_lock); |
6bdaa1f1 | 2737 | out_put: |
1da177e4 | 2738 | put_disk(gd); |
6bdaa1f1 | 2739 | out_free: |
1da177e4 | 2740 | kfree(sdkp); |
6bdaa1f1 | 2741 | out: |
1da177e4 LT |
2742 | return error; |
2743 | } | |
2744 | ||
2745 | /** | |
2746 | * sd_remove - called whenever a scsi disk (previously recognized by | |
2747 | * sd_probe) is detached from the system. It is called (potentially | |
2748 | * multiple times) during sd module unload. | |
2749 | * @sdp: pointer to mid level scsi device object | |
2750 | * | |
2751 | * Note: this function is invoked from the scsi mid-level. | |
2752 | * This function potentially frees up a device name (e.g. /dev/sdc) | |
2753 | * that could be re-used by a subsequent sd_probe(). | |
2754 | * This function is not called when the built-in sd driver is "exit-ed". | |
2755 | **/ | |
2756 | static int sd_remove(struct device *dev) | |
2757 | { | |
601e7638 | 2758 | struct scsi_disk *sdkp; |
1da177e4 | 2759 | |
601e7638 | 2760 | sdkp = dev_get_drvdata(dev); |
478a8a05 AS |
2761 | scsi_autopm_get_device(sdkp->device); |
2762 | ||
a7a20d10 | 2763 | async_synchronize_full_domain(&scsi_sd_probe_domain); |
b391277a | 2764 | blk_queue_prep_rq(sdkp->device->request_queue, scsi_prep_fn); |
82b6d57f | 2765 | blk_queue_unprep_rq(sdkp->device->request_queue, NULL); |
ee959b00 | 2766 | device_del(&sdkp->dev); |
1da177e4 LT |
2767 | del_gendisk(sdkp->disk); |
2768 | sd_shutdown(dev); | |
39b7f1e2 | 2769 | |
0b950672 | 2770 | mutex_lock(&sd_ref_mutex); |
39b7f1e2 | 2771 | dev_set_drvdata(dev, NULL); |
ee959b00 | 2772 | put_device(&sdkp->dev); |
0b950672 | 2773 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
2774 | |
2775 | return 0; | |
2776 | } | |
2777 | ||
2778 | /** | |
2779 | * scsi_disk_release - Called to free the scsi_disk structure | |
ee959b00 | 2780 | * @dev: pointer to embedded class device |
1da177e4 | 2781 | * |
0b950672 | 2782 | * sd_ref_mutex must be held entering this routine. Because it is |
1da177e4 LT |
2783 | * called on last put, you should always use the scsi_disk_get() |
2784 | * scsi_disk_put() helpers which manipulate the semaphore directly | |
ee959b00 | 2785 | * and never do a direct put_device. |
1da177e4 | 2786 | **/ |
ee959b00 | 2787 | static void scsi_disk_release(struct device *dev) |
1da177e4 | 2788 | { |
ee959b00 | 2789 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
1da177e4 LT |
2790 | struct gendisk *disk = sdkp->disk; |
2791 | ||
4034cc68 | 2792 | spin_lock(&sd_index_lock); |
f27bac27 | 2793 | ida_remove(&sd_index_ida, sdkp->index); |
4034cc68 | 2794 | spin_unlock(&sd_index_lock); |
1da177e4 LT |
2795 | |
2796 | disk->private_data = NULL; | |
1da177e4 | 2797 | put_disk(disk); |
39b7f1e2 | 2798 | put_device(&sdkp->device->sdev_gendev); |
1da177e4 LT |
2799 | |
2800 | kfree(sdkp); | |
2801 | } | |
2802 | ||
cc5d2c8c | 2803 | static int sd_start_stop_device(struct scsi_disk *sdkp, int start) |
c3c94c5a TH |
2804 | { |
2805 | unsigned char cmd[6] = { START_STOP }; /* START_VALID */ | |
2806 | struct scsi_sense_hdr sshdr; | |
cc5d2c8c | 2807 | struct scsi_device *sdp = sdkp->device; |
c3c94c5a TH |
2808 | int res; |
2809 | ||
2810 | if (start) | |
2811 | cmd[4] |= 1; /* START */ | |
2812 | ||
d2886ea3 SR |
2813 | if (sdp->start_stop_pwr_cond) |
2814 | cmd[4] |= start ? 1 << 4 : 3 << 4; /* Active or Standby */ | |
2815 | ||
c3c94c5a TH |
2816 | if (!scsi_device_online(sdp)) |
2817 | return -ENODEV; | |
2818 | ||
2819 | res = scsi_execute_req(sdp, cmd, DMA_NONE, NULL, 0, &sshdr, | |
f4f4e47e | 2820 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); |
c3c94c5a | 2821 | if (res) { |
cc5d2c8c JB |
2822 | sd_printk(KERN_WARNING, sdkp, "START_STOP FAILED\n"); |
2823 | sd_print_result(sdkp, res); | |
c3c94c5a | 2824 | if (driver_byte(res) & DRIVER_SENSE) |
cc5d2c8c | 2825 | sd_print_sense_hdr(sdkp, &sshdr); |
c3c94c5a TH |
2826 | } |
2827 | ||
2828 | return res; | |
2829 | } | |
2830 | ||
1da177e4 LT |
2831 | /* |
2832 | * Send a SYNCHRONIZE CACHE instruction down to the device through | |
2833 | * the normal SCSI command structure. Wait for the command to | |
2834 | * complete. | |
2835 | */ | |
2836 | static void sd_shutdown(struct device *dev) | |
2837 | { | |
39b7f1e2 | 2838 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
1da177e4 LT |
2839 | |
2840 | if (!sdkp) | |
2841 | return; /* this can happen */ | |
2842 | ||
54f57588 LM |
2843 | if (pm_runtime_suspended(dev)) |
2844 | goto exit; | |
2845 | ||
39b7f1e2 | 2846 | if (sdkp->WCE) { |
e73aec82 MP |
2847 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
2848 | sd_sync_cache(sdkp); | |
39b7f1e2 | 2849 | } |
c3c94c5a | 2850 | |
cc5d2c8c JB |
2851 | if (system_state != SYSTEM_RESTART && sdkp->device->manage_start_stop) { |
2852 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); | |
2853 | sd_start_stop_device(sdkp, 0); | |
c3c94c5a TH |
2854 | } |
2855 | ||
54f57588 | 2856 | exit: |
39b7f1e2 AS |
2857 | scsi_disk_put(sdkp); |
2858 | } | |
1da177e4 | 2859 | |
c3c94c5a TH |
2860 | static int sd_suspend(struct device *dev, pm_message_t mesg) |
2861 | { | |
c3c94c5a | 2862 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
09ff92fe | 2863 | int ret = 0; |
c3c94c5a TH |
2864 | |
2865 | if (!sdkp) | |
2866 | return 0; /* this can happen */ | |
2867 | ||
2868 | if (sdkp->WCE) { | |
cc5d2c8c | 2869 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
c3c94c5a TH |
2870 | ret = sd_sync_cache(sdkp); |
2871 | if (ret) | |
09ff92fe | 2872 | goto done; |
c3c94c5a TH |
2873 | } |
2874 | ||
3a2d5b70 | 2875 | if ((mesg.event & PM_EVENT_SLEEP) && sdkp->device->manage_start_stop) { |
cc5d2c8c JB |
2876 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); |
2877 | ret = sd_start_stop_device(sdkp, 0); | |
c3c94c5a TH |
2878 | } |
2879 | ||
09ff92fe AS |
2880 | done: |
2881 | scsi_disk_put(sdkp); | |
2882 | return ret; | |
c3c94c5a TH |
2883 | } |
2884 | ||
2885 | static int sd_resume(struct device *dev) | |
2886 | { | |
c3c94c5a | 2887 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
09ff92fe | 2888 | int ret = 0; |
c3c94c5a | 2889 | |
cc5d2c8c | 2890 | if (!sdkp->device->manage_start_stop) |
09ff92fe | 2891 | goto done; |
c3c94c5a | 2892 | |
cc5d2c8c | 2893 | sd_printk(KERN_NOTICE, sdkp, "Starting disk\n"); |
09ff92fe | 2894 | ret = sd_start_stop_device(sdkp, 1); |
c3c94c5a | 2895 | |
09ff92fe AS |
2896 | done: |
2897 | scsi_disk_put(sdkp); | |
2898 | return ret; | |
c3c94c5a TH |
2899 | } |
2900 | ||
1da177e4 LT |
2901 | /** |
2902 | * init_sd - entry point for this driver (both when built in or when | |
2903 | * a module). | |
2904 | * | |
2905 | * Note: this function registers this driver with the scsi mid-level. | |
2906 | **/ | |
2907 | static int __init init_sd(void) | |
2908 | { | |
5e4009ba | 2909 | int majors = 0, i, err; |
1da177e4 LT |
2910 | |
2911 | SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n")); | |
2912 | ||
2913 | for (i = 0; i < SD_MAJORS; i++) | |
2914 | if (register_blkdev(sd_major(i), "sd") == 0) | |
2915 | majors++; | |
2916 | ||
2917 | if (!majors) | |
2918 | return -ENODEV; | |
2919 | ||
5e4009ba JG |
2920 | err = class_register(&sd_disk_class); |
2921 | if (err) | |
2922 | goto err_out; | |
6bdaa1f1 | 2923 | |
5e4009ba JG |
2924 | err = scsi_register_driver(&sd_template.gendrv); |
2925 | if (err) | |
2926 | goto err_out_class; | |
2927 | ||
4e7392ec MP |
2928 | sd_cdb_cache = kmem_cache_create("sd_ext_cdb", SD_EXT_CDB_SIZE, |
2929 | 0, 0, NULL); | |
2930 | if (!sd_cdb_cache) { | |
2931 | printk(KERN_ERR "sd: can't init extended cdb cache\n"); | |
2932 | goto err_out_class; | |
2933 | } | |
2934 | ||
2935 | sd_cdb_pool = mempool_create_slab_pool(SD_MEMPOOL_SIZE, sd_cdb_cache); | |
2936 | if (!sd_cdb_pool) { | |
2937 | printk(KERN_ERR "sd: can't init extended cdb pool\n"); | |
2938 | goto err_out_cache; | |
2939 | } | |
2940 | ||
5e4009ba JG |
2941 | return 0; |
2942 | ||
4e7392ec MP |
2943 | err_out_cache: |
2944 | kmem_cache_destroy(sd_cdb_cache); | |
2945 | ||
5e4009ba JG |
2946 | err_out_class: |
2947 | class_unregister(&sd_disk_class); | |
2948 | err_out: | |
2949 | for (i = 0; i < SD_MAJORS; i++) | |
2950 | unregister_blkdev(sd_major(i), "sd"); | |
2951 | return err; | |
1da177e4 LT |
2952 | } |
2953 | ||
2954 | /** | |
2955 | * exit_sd - exit point for this driver (when it is a module). | |
2956 | * | |
2957 | * Note: this function unregisters this driver from the scsi mid-level. | |
2958 | **/ | |
2959 | static void __exit exit_sd(void) | |
2960 | { | |
2961 | int i; | |
2962 | ||
2963 | SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n")); | |
2964 | ||
4e7392ec MP |
2965 | mempool_destroy(sd_cdb_pool); |
2966 | kmem_cache_destroy(sd_cdb_cache); | |
2967 | ||
1da177e4 | 2968 | scsi_unregister_driver(&sd_template.gendrv); |
5e4009ba JG |
2969 | class_unregister(&sd_disk_class); |
2970 | ||
1da177e4 LT |
2971 | for (i = 0; i < SD_MAJORS; i++) |
2972 | unregister_blkdev(sd_major(i), "sd"); | |
2973 | } | |
2974 | ||
1da177e4 LT |
2975 | module_init(init_sd); |
2976 | module_exit(exit_sd); | |
e73aec82 MP |
2977 | |
2978 | static void sd_print_sense_hdr(struct scsi_disk *sdkp, | |
2979 | struct scsi_sense_hdr *sshdr) | |
2980 | { | |
2e4c3329 | 2981 | sd_printk(KERN_INFO, sdkp, " "); |
e73aec82 | 2982 | scsi_show_sense_hdr(sshdr); |
2e4c3329 | 2983 | sd_printk(KERN_INFO, sdkp, " "); |
e73aec82 MP |
2984 | scsi_show_extd_sense(sshdr->asc, sshdr->ascq); |
2985 | } | |
2986 | ||
2987 | static void sd_print_result(struct scsi_disk *sdkp, int result) | |
2988 | { | |
2e4c3329 | 2989 | sd_printk(KERN_INFO, sdkp, " "); |
e73aec82 MP |
2990 | scsi_show_result(result); |
2991 | } | |
2992 |