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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> |
924d55b0 | 54 | #include <linux/pr.h> |
8475c811 | 55 | #include <linux/t10-pi.h> |
1da177e4 | 56 | #include <asm/uaccess.h> |
8f76d151 | 57 | #include <asm/unaligned.h> |
1da177e4 LT |
58 | |
59 | #include <scsi/scsi.h> | |
60 | #include <scsi/scsi_cmnd.h> | |
61 | #include <scsi/scsi_dbg.h> | |
62 | #include <scsi/scsi_device.h> | |
63 | #include <scsi/scsi_driver.h> | |
64 | #include <scsi/scsi_eh.h> | |
65 | #include <scsi/scsi_host.h> | |
66 | #include <scsi/scsi_ioctl.h> | |
1da177e4 LT |
67 | #include <scsi/scsicam.h> |
68 | ||
aa91696e | 69 | #include "sd.h" |
a7a20d10 | 70 | #include "scsi_priv.h" |
1da177e4 LT |
71 | #include "scsi_logging.h" |
72 | ||
f018fa55 RH |
73 | MODULE_AUTHOR("Eric Youngdale"); |
74 | MODULE_DESCRIPTION("SCSI disk (sd) driver"); | |
75 | MODULE_LICENSE("GPL"); | |
76 | ||
77 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK0_MAJOR); | |
78 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK1_MAJOR); | |
79 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK2_MAJOR); | |
80 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK3_MAJOR); | |
81 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK4_MAJOR); | |
82 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK5_MAJOR); | |
83 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK6_MAJOR); | |
84 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK7_MAJOR); | |
85 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK8_MAJOR); | |
86 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK9_MAJOR); | |
87 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK10_MAJOR); | |
88 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK11_MAJOR); | |
89 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK12_MAJOR); | |
90 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK13_MAJOR); | |
91 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK14_MAJOR); | |
92 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK15_MAJOR); | |
d7b8bcb0 MT |
93 | MODULE_ALIAS_SCSI_DEVICE(TYPE_DISK); |
94 | MODULE_ALIAS_SCSI_DEVICE(TYPE_MOD); | |
95 | MODULE_ALIAS_SCSI_DEVICE(TYPE_RBC); | |
f018fa55 | 96 | |
870d6656 | 97 | #if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT) |
f615b48c | 98 | #define SD_MINORS 16 |
870d6656 | 99 | #else |
3e1a7ff8 | 100 | #define SD_MINORS 0 |
870d6656 TH |
101 | #endif |
102 | ||
c98a0eb0 | 103 | static void sd_config_discard(struct scsi_disk *, unsigned int); |
5db44863 | 104 | static void sd_config_write_same(struct scsi_disk *); |
7b3d9545 | 105 | static int sd_revalidate_disk(struct gendisk *); |
72ec24bd | 106 | static void sd_unlock_native_capacity(struct gendisk *disk); |
7b3d9545 LT |
107 | static int sd_probe(struct device *); |
108 | static int sd_remove(struct device *); | |
109 | static void sd_shutdown(struct device *); | |
95897910 ON |
110 | static int sd_suspend_system(struct device *); |
111 | static int sd_suspend_runtime(struct device *); | |
7b3d9545 LT |
112 | static int sd_resume(struct device *); |
113 | static void sd_rescan(struct device *); | |
a1b73fc1 CH |
114 | static int sd_init_command(struct scsi_cmnd *SCpnt); |
115 | static void sd_uninit_command(struct scsi_cmnd *SCpnt); | |
7b3d9545 | 116 | static int sd_done(struct scsi_cmnd *); |
2451079b | 117 | static int sd_eh_action(struct scsi_cmnd *, int); |
7b3d9545 | 118 | static void sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer); |
ee959b00 | 119 | static void scsi_disk_release(struct device *cdev); |
7b3d9545 | 120 | static void sd_print_sense_hdr(struct scsi_disk *, struct scsi_sense_hdr *); |
ef61329d | 121 | static void sd_print_result(const struct scsi_disk *, const char *, int); |
7b3d9545 | 122 | |
4034cc68 | 123 | static DEFINE_SPINLOCK(sd_index_lock); |
f27bac27 | 124 | static DEFINE_IDA(sd_index_ida); |
1da177e4 LT |
125 | |
126 | /* This semaphore is used to mediate the 0->1 reference get in the | |
127 | * face of object destruction (i.e. we can't allow a get on an | |
128 | * object after last put) */ | |
0b950672 | 129 | static DEFINE_MUTEX(sd_ref_mutex); |
1da177e4 | 130 | |
439d77f7 HS |
131 | static struct kmem_cache *sd_cdb_cache; |
132 | static mempool_t *sd_cdb_pool; | |
4e7392ec | 133 | |
6bdaa1f1 JB |
134 | static const char *sd_cache_types[] = { |
135 | "write through", "none", "write back", | |
136 | "write back, no read (daft)" | |
137 | }; | |
138 | ||
cb2fb68d VC |
139 | static void sd_set_flush_flag(struct scsi_disk *sdkp) |
140 | { | |
eb310e23 | 141 | bool wc = false, fua = false; |
cb2fb68d VC |
142 | |
143 | if (sdkp->WCE) { | |
eb310e23 | 144 | wc = true; |
cb2fb68d | 145 | if (sdkp->DPOFUA) |
eb310e23 | 146 | fua = true; |
cb2fb68d VC |
147 | } |
148 | ||
eb310e23 | 149 | blk_queue_write_cache(sdkp->disk->queue, wc, fua); |
cb2fb68d VC |
150 | } |
151 | ||
ee959b00 | 152 | static ssize_t |
e1ea2351 GKH |
153 | cache_type_store(struct device *dev, struct device_attribute *attr, |
154 | const char *buf, size_t count) | |
6bdaa1f1 JB |
155 | { |
156 | int i, ct = -1, rcd, wce, sp; | |
ee959b00 | 157 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
158 | struct scsi_device *sdp = sdkp->device; |
159 | char buffer[64]; | |
160 | char *buffer_data; | |
161 | struct scsi_mode_data data; | |
162 | struct scsi_sense_hdr sshdr; | |
2ee3e26c | 163 | static const char temp[] = "temporary "; |
6bdaa1f1 JB |
164 | int len; |
165 | ||
166 | if (sdp->type != TYPE_DISK) | |
167 | /* no cache control on RBC devices; theoretically they | |
168 | * can do it, but there's probably so many exceptions | |
169 | * it's not worth the risk */ | |
170 | return -EINVAL; | |
171 | ||
39c60a09 JB |
172 | if (strncmp(buf, temp, sizeof(temp) - 1) == 0) { |
173 | buf += sizeof(temp) - 1; | |
174 | sdkp->cache_override = 1; | |
175 | } else { | |
176 | sdkp->cache_override = 0; | |
177 | } | |
178 | ||
6391a113 | 179 | for (i = 0; i < ARRAY_SIZE(sd_cache_types); i++) { |
439d77f7 | 180 | len = strlen(sd_cache_types[i]); |
6bdaa1f1 JB |
181 | if (strncmp(sd_cache_types[i], buf, len) == 0 && |
182 | buf[len] == '\n') { | |
183 | ct = i; | |
184 | break; | |
185 | } | |
186 | } | |
187 | if (ct < 0) | |
188 | return -EINVAL; | |
189 | rcd = ct & 0x01 ? 1 : 0; | |
2eefd57b | 190 | wce = (ct & 0x02) && !sdkp->write_prot ? 1 : 0; |
39c60a09 JB |
191 | |
192 | if (sdkp->cache_override) { | |
193 | sdkp->WCE = wce; | |
194 | sdkp->RCD = rcd; | |
cb2fb68d | 195 | sd_set_flush_flag(sdkp); |
39c60a09 JB |
196 | return count; |
197 | } | |
198 | ||
6bdaa1f1 JB |
199 | if (scsi_mode_sense(sdp, 0x08, 8, buffer, sizeof(buffer), SD_TIMEOUT, |
200 | SD_MAX_RETRIES, &data, NULL)) | |
201 | return -EINVAL; | |
a9312fb8 | 202 | len = min_t(size_t, sizeof(buffer), data.length - data.header_length - |
6bdaa1f1 JB |
203 | data.block_descriptor_length); |
204 | buffer_data = buffer + data.header_length + | |
205 | data.block_descriptor_length; | |
206 | buffer_data[2] &= ~0x05; | |
207 | buffer_data[2] |= wce << 2 | rcd; | |
208 | sp = buffer_data[0] & 0x80 ? 1 : 0; | |
2c5d16d6 | 209 | buffer_data[0] &= ~0x80; |
6bdaa1f1 JB |
210 | |
211 | if (scsi_mode_select(sdp, 1, sp, 8, buffer_data, len, SD_TIMEOUT, | |
212 | SD_MAX_RETRIES, &data, &sshdr)) { | |
213 | if (scsi_sense_valid(&sshdr)) | |
e73aec82 | 214 | sd_print_sense_hdr(sdkp, &sshdr); |
6bdaa1f1 JB |
215 | return -EINVAL; |
216 | } | |
f98a8cae | 217 | revalidate_disk(sdkp->disk); |
6bdaa1f1 JB |
218 | return count; |
219 | } | |
220 | ||
ee959b00 | 221 | static ssize_t |
e1ea2351 GKH |
222 | manage_start_stop_show(struct device *dev, struct device_attribute *attr, |
223 | char *buf) | |
224 | { | |
225 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
226 | struct scsi_device *sdp = sdkp->device; | |
227 | ||
228 | return snprintf(buf, 20, "%u\n", sdp->manage_start_stop); | |
229 | } | |
230 | ||
231 | static ssize_t | |
232 | manage_start_stop_store(struct device *dev, struct device_attribute *attr, | |
233 | const char *buf, size_t count) | |
c3c94c5a | 234 | { |
ee959b00 | 235 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
c3c94c5a TH |
236 | struct scsi_device *sdp = sdkp->device; |
237 | ||
238 | if (!capable(CAP_SYS_ADMIN)) | |
239 | return -EACCES; | |
240 | ||
241 | sdp->manage_start_stop = simple_strtoul(buf, NULL, 10); | |
242 | ||
243 | return count; | |
244 | } | |
e1ea2351 | 245 | static DEVICE_ATTR_RW(manage_start_stop); |
c3c94c5a | 246 | |
ee959b00 | 247 | static ssize_t |
e1ea2351 GKH |
248 | allow_restart_show(struct device *dev, struct device_attribute *attr, char *buf) |
249 | { | |
250 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
251 | ||
252 | return snprintf(buf, 40, "%d\n", sdkp->device->allow_restart); | |
253 | } | |
254 | ||
255 | static ssize_t | |
256 | allow_restart_store(struct device *dev, struct device_attribute *attr, | |
257 | const char *buf, size_t count) | |
a144c5ae | 258 | { |
ee959b00 | 259 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
a144c5ae BK |
260 | struct scsi_device *sdp = sdkp->device; |
261 | ||
262 | if (!capable(CAP_SYS_ADMIN)) | |
263 | return -EACCES; | |
264 | ||
265 | if (sdp->type != TYPE_DISK) | |
266 | return -EINVAL; | |
267 | ||
268 | sdp->allow_restart = simple_strtoul(buf, NULL, 10); | |
269 | ||
270 | return count; | |
271 | } | |
e1ea2351 | 272 | static DEVICE_ATTR_RW(allow_restart); |
a144c5ae | 273 | |
ee959b00 | 274 | static ssize_t |
e1ea2351 | 275 | cache_type_show(struct device *dev, struct device_attribute *attr, char *buf) |
6bdaa1f1 | 276 | { |
ee959b00 | 277 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
278 | int ct = sdkp->RCD + 2*sdkp->WCE; |
279 | ||
280 | return snprintf(buf, 40, "%s\n", sd_cache_types[ct]); | |
281 | } | |
e1ea2351 | 282 | static DEVICE_ATTR_RW(cache_type); |
6bdaa1f1 | 283 | |
ee959b00 | 284 | static ssize_t |
e1ea2351 | 285 | FUA_show(struct device *dev, struct device_attribute *attr, char *buf) |
6bdaa1f1 | 286 | { |
ee959b00 | 287 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
288 | |
289 | return snprintf(buf, 20, "%u\n", sdkp->DPOFUA); | |
290 | } | |
e1ea2351 | 291 | static DEVICE_ATTR_RO(FUA); |
6bdaa1f1 | 292 | |
ee959b00 | 293 | static ssize_t |
e1ea2351 GKH |
294 | protection_type_show(struct device *dev, struct device_attribute *attr, |
295 | char *buf) | |
e0597d70 MP |
296 | { |
297 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
298 | ||
299 | return snprintf(buf, 20, "%u\n", sdkp->protection_type); | |
300 | } | |
301 | ||
8172499a | 302 | static ssize_t |
e1ea2351 GKH |
303 | protection_type_store(struct device *dev, struct device_attribute *attr, |
304 | const char *buf, size_t count) | |
8172499a MP |
305 | { |
306 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
307 | unsigned int val; | |
308 | int err; | |
309 | ||
310 | if (!capable(CAP_SYS_ADMIN)) | |
311 | return -EACCES; | |
312 | ||
313 | err = kstrtouint(buf, 10, &val); | |
314 | ||
315 | if (err) | |
316 | return err; | |
317 | ||
8475c811 | 318 | if (val >= 0 && val <= T10_PI_TYPE3_PROTECTION) |
8172499a MP |
319 | sdkp->protection_type = val; |
320 | ||
321 | return count; | |
322 | } | |
e1ea2351 | 323 | static DEVICE_ATTR_RW(protection_type); |
8172499a | 324 | |
518fa8e3 | 325 | static ssize_t |
e1ea2351 GKH |
326 | protection_mode_show(struct device *dev, struct device_attribute *attr, |
327 | char *buf) | |
518fa8e3 MP |
328 | { |
329 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
330 | struct scsi_device *sdp = sdkp->device; | |
331 | unsigned int dif, dix; | |
332 | ||
333 | dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type); | |
334 | dix = scsi_host_dix_capable(sdp->host, sdkp->protection_type); | |
335 | ||
8475c811 | 336 | if (!dix && scsi_host_dix_capable(sdp->host, T10_PI_TYPE0_PROTECTION)) { |
518fa8e3 MP |
337 | dif = 0; |
338 | dix = 1; | |
339 | } | |
340 | ||
341 | if (!dif && !dix) | |
342 | return snprintf(buf, 20, "none\n"); | |
343 | ||
344 | return snprintf(buf, 20, "%s%u\n", dix ? "dix" : "dif", dif); | |
345 | } | |
e1ea2351 | 346 | static DEVICE_ATTR_RO(protection_mode); |
518fa8e3 | 347 | |
e0597d70 | 348 | static ssize_t |
e1ea2351 | 349 | app_tag_own_show(struct device *dev, struct device_attribute *attr, char *buf) |
e0597d70 MP |
350 | { |
351 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
352 | ||
353 | return snprintf(buf, 20, "%u\n", sdkp->ATO); | |
354 | } | |
e1ea2351 | 355 | static DEVICE_ATTR_RO(app_tag_own); |
e0597d70 | 356 | |
e339c1a7 | 357 | static ssize_t |
e1ea2351 GKH |
358 | thin_provisioning_show(struct device *dev, struct device_attribute *attr, |
359 | char *buf) | |
e339c1a7 MP |
360 | { |
361 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
362 | ||
c98a0eb0 MP |
363 | return snprintf(buf, 20, "%u\n", sdkp->lbpme); |
364 | } | |
e1ea2351 | 365 | static DEVICE_ATTR_RO(thin_provisioning); |
c98a0eb0 MP |
366 | |
367 | static const char *lbp_mode[] = { | |
368 | [SD_LBP_FULL] = "full", | |
369 | [SD_LBP_UNMAP] = "unmap", | |
370 | [SD_LBP_WS16] = "writesame_16", | |
371 | [SD_LBP_WS10] = "writesame_10", | |
372 | [SD_LBP_ZERO] = "writesame_zero", | |
373 | [SD_LBP_DISABLE] = "disabled", | |
374 | }; | |
375 | ||
376 | static ssize_t | |
e1ea2351 GKH |
377 | provisioning_mode_show(struct device *dev, struct device_attribute *attr, |
378 | char *buf) | |
c98a0eb0 MP |
379 | { |
380 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
381 | ||
382 | return snprintf(buf, 20, "%s\n", lbp_mode[sdkp->provisioning_mode]); | |
383 | } | |
384 | ||
385 | static ssize_t | |
e1ea2351 GKH |
386 | provisioning_mode_store(struct device *dev, struct device_attribute *attr, |
387 | const char *buf, size_t count) | |
c98a0eb0 MP |
388 | { |
389 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
390 | struct scsi_device *sdp = sdkp->device; | |
391 | ||
392 | if (!capable(CAP_SYS_ADMIN)) | |
393 | return -EACCES; | |
394 | ||
395 | if (sdp->type != TYPE_DISK) | |
396 | return -EINVAL; | |
397 | ||
398 | if (!strncmp(buf, lbp_mode[SD_LBP_UNMAP], 20)) | |
399 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
400 | else if (!strncmp(buf, lbp_mode[SD_LBP_WS16], 20)) | |
401 | sd_config_discard(sdkp, SD_LBP_WS16); | |
402 | else if (!strncmp(buf, lbp_mode[SD_LBP_WS10], 20)) | |
403 | sd_config_discard(sdkp, SD_LBP_WS10); | |
404 | else if (!strncmp(buf, lbp_mode[SD_LBP_ZERO], 20)) | |
405 | sd_config_discard(sdkp, SD_LBP_ZERO); | |
406 | else if (!strncmp(buf, lbp_mode[SD_LBP_DISABLE], 20)) | |
407 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
408 | else | |
409 | return -EINVAL; | |
410 | ||
411 | return count; | |
e339c1a7 | 412 | } |
e1ea2351 | 413 | static DEVICE_ATTR_RW(provisioning_mode); |
e339c1a7 | 414 | |
18a4d0a2 | 415 | static ssize_t |
e1ea2351 GKH |
416 | max_medium_access_timeouts_show(struct device *dev, |
417 | struct device_attribute *attr, char *buf) | |
18a4d0a2 MP |
418 | { |
419 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
420 | ||
421 | return snprintf(buf, 20, "%u\n", sdkp->max_medium_access_timeouts); | |
422 | } | |
423 | ||
424 | static ssize_t | |
e1ea2351 GKH |
425 | max_medium_access_timeouts_store(struct device *dev, |
426 | struct device_attribute *attr, const char *buf, | |
427 | size_t count) | |
18a4d0a2 MP |
428 | { |
429 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
430 | int err; | |
431 | ||
432 | if (!capable(CAP_SYS_ADMIN)) | |
433 | return -EACCES; | |
434 | ||
435 | err = kstrtouint(buf, 10, &sdkp->max_medium_access_timeouts); | |
436 | ||
437 | return err ? err : count; | |
438 | } | |
e1ea2351 | 439 | static DEVICE_ATTR_RW(max_medium_access_timeouts); |
18a4d0a2 | 440 | |
5db44863 | 441 | static ssize_t |
e1ea2351 GKH |
442 | max_write_same_blocks_show(struct device *dev, struct device_attribute *attr, |
443 | char *buf) | |
5db44863 MP |
444 | { |
445 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
446 | ||
447 | return snprintf(buf, 20, "%u\n", sdkp->max_ws_blocks); | |
448 | } | |
449 | ||
450 | static ssize_t | |
e1ea2351 GKH |
451 | max_write_same_blocks_store(struct device *dev, struct device_attribute *attr, |
452 | const char *buf, size_t count) | |
5db44863 MP |
453 | { |
454 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
455 | struct scsi_device *sdp = sdkp->device; | |
456 | unsigned long max; | |
457 | int err; | |
458 | ||
459 | if (!capable(CAP_SYS_ADMIN)) | |
460 | return -EACCES; | |
461 | ||
462 | if (sdp->type != TYPE_DISK) | |
463 | return -EINVAL; | |
464 | ||
465 | err = kstrtoul(buf, 10, &max); | |
466 | ||
467 | if (err) | |
468 | return err; | |
469 | ||
470 | if (max == 0) | |
471 | sdp->no_write_same = 1; | |
66c28f97 MP |
472 | else if (max <= SD_MAX_WS16_BLOCKS) { |
473 | sdp->no_write_same = 0; | |
5db44863 | 474 | sdkp->max_ws_blocks = max; |
66c28f97 | 475 | } |
5db44863 MP |
476 | |
477 | sd_config_write_same(sdkp); | |
478 | ||
479 | return count; | |
480 | } | |
e1ea2351 GKH |
481 | static DEVICE_ATTR_RW(max_write_same_blocks); |
482 | ||
483 | static struct attribute *sd_disk_attrs[] = { | |
484 | &dev_attr_cache_type.attr, | |
485 | &dev_attr_FUA.attr, | |
486 | &dev_attr_allow_restart.attr, | |
487 | &dev_attr_manage_start_stop.attr, | |
488 | &dev_attr_protection_type.attr, | |
489 | &dev_attr_protection_mode.attr, | |
490 | &dev_attr_app_tag_own.attr, | |
491 | &dev_attr_thin_provisioning.attr, | |
492 | &dev_attr_provisioning_mode.attr, | |
493 | &dev_attr_max_write_same_blocks.attr, | |
494 | &dev_attr_max_medium_access_timeouts.attr, | |
495 | NULL, | |
6bdaa1f1 | 496 | }; |
e1ea2351 | 497 | ATTRIBUTE_GROUPS(sd_disk); |
6bdaa1f1 JB |
498 | |
499 | static struct class sd_disk_class = { | |
500 | .name = "scsi_disk", | |
501 | .owner = THIS_MODULE, | |
ee959b00 | 502 | .dev_release = scsi_disk_release, |
e1ea2351 | 503 | .dev_groups = sd_disk_groups, |
6bdaa1f1 | 504 | }; |
1da177e4 | 505 | |
691e3d31 | 506 | static const struct dev_pm_ops sd_pm_ops = { |
95897910 | 507 | .suspend = sd_suspend_system, |
691e3d31 | 508 | .resume = sd_resume, |
95897910 | 509 | .poweroff = sd_suspend_system, |
691e3d31 | 510 | .restore = sd_resume, |
95897910 | 511 | .runtime_suspend = sd_suspend_runtime, |
691e3d31 AL |
512 | .runtime_resume = sd_resume, |
513 | }; | |
514 | ||
1da177e4 | 515 | static struct scsi_driver sd_template = { |
1da177e4 LT |
516 | .gendrv = { |
517 | .name = "sd", | |
3af6b352 | 518 | .owner = THIS_MODULE, |
1da177e4 LT |
519 | .probe = sd_probe, |
520 | .remove = sd_remove, | |
521 | .shutdown = sd_shutdown, | |
691e3d31 | 522 | .pm = &sd_pm_ops, |
1da177e4 LT |
523 | }, |
524 | .rescan = sd_rescan, | |
a1b73fc1 CH |
525 | .init_command = sd_init_command, |
526 | .uninit_command = sd_uninit_command, | |
7b3d9545 | 527 | .done = sd_done, |
18a4d0a2 | 528 | .eh_action = sd_eh_action, |
1da177e4 LT |
529 | }; |
530 | ||
0761df9c HR |
531 | /* |
532 | * Dummy kobj_map->probe function. | |
533 | * The default ->probe function will call modprobe, which is | |
534 | * pointless as this module is already loaded. | |
535 | */ | |
536 | static struct kobject *sd_default_probe(dev_t devt, int *partno, void *data) | |
537 | { | |
538 | return NULL; | |
539 | } | |
540 | ||
1da177e4 LT |
541 | /* |
542 | * Device no to disk mapping: | |
543 | * | |
544 | * major disc2 disc p1 | |
545 | * |............|.............|....|....| <- dev_t | |
546 | * 31 20 19 8 7 4 3 0 | |
547 | * | |
548 | * Inside a major, we have 16k disks, however mapped non- | |
549 | * contiguously. The first 16 disks are for major0, the next | |
550 | * ones with major1, ... Disk 256 is for major0 again, disk 272 | |
551 | * for major1, ... | |
552 | * As we stay compatible with our numbering scheme, we can reuse | |
553 | * the well-know SCSI majors 8, 65--71, 136--143. | |
554 | */ | |
555 | static int sd_major(int major_idx) | |
556 | { | |
557 | switch (major_idx) { | |
558 | case 0: | |
559 | return SCSI_DISK0_MAJOR; | |
560 | case 1 ... 7: | |
561 | return SCSI_DISK1_MAJOR + major_idx - 1; | |
562 | case 8 ... 15: | |
563 | return SCSI_DISK8_MAJOR + major_idx - 8; | |
564 | default: | |
565 | BUG(); | |
566 | return 0; /* shut up gcc */ | |
567 | } | |
568 | } | |
569 | ||
3d9a1f53 | 570 | static struct scsi_disk *scsi_disk_get(struct gendisk *disk) |
1da177e4 LT |
571 | { |
572 | struct scsi_disk *sdkp = NULL; | |
573 | ||
3d9a1f53 CH |
574 | mutex_lock(&sd_ref_mutex); |
575 | ||
39b7f1e2 AS |
576 | if (disk->private_data) { |
577 | sdkp = scsi_disk(disk); | |
578 | if (scsi_device_get(sdkp->device) == 0) | |
ee959b00 | 579 | get_device(&sdkp->dev); |
39b7f1e2 AS |
580 | else |
581 | sdkp = NULL; | |
582 | } | |
0b950672 | 583 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
584 | return sdkp; |
585 | } | |
586 | ||
587 | static void scsi_disk_put(struct scsi_disk *sdkp) | |
588 | { | |
589 | struct scsi_device *sdev = sdkp->device; | |
590 | ||
0b950672 | 591 | mutex_lock(&sd_ref_mutex); |
ee959b00 | 592 | put_device(&sdkp->dev); |
1da177e4 | 593 | scsi_device_put(sdev); |
0b950672 | 594 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
595 | } |
596 | ||
c611529e MP |
597 | static unsigned char sd_setup_protect_cmnd(struct scsi_cmnd *scmd, |
598 | unsigned int dix, unsigned int dif) | |
35e1a5d9 | 599 | { |
c611529e MP |
600 | struct bio *bio = scmd->request->bio; |
601 | unsigned int prot_op = sd_prot_op(rq_data_dir(scmd->request), dix, dif); | |
602 | unsigned int protect = 0; | |
603 | ||
604 | if (dix) { /* DIX Type 0, 1, 2, 3 */ | |
605 | if (bio_integrity_flagged(bio, BIP_IP_CHECKSUM)) | |
606 | scmd->prot_flags |= SCSI_PROT_IP_CHECKSUM; | |
607 | ||
608 | if (bio_integrity_flagged(bio, BIP_CTRL_NOCHECK) == false) | |
609 | scmd->prot_flags |= SCSI_PROT_GUARD_CHECK; | |
610 | } | |
611 | ||
8475c811 | 612 | if (dif != T10_PI_TYPE3_PROTECTION) { /* DIX/DIF Type 0, 1, 2 */ |
c611529e MP |
613 | scmd->prot_flags |= SCSI_PROT_REF_INCREMENT; |
614 | ||
615 | if (bio_integrity_flagged(bio, BIP_CTRL_NOCHECK) == false) | |
616 | scmd->prot_flags |= SCSI_PROT_REF_CHECK; | |
617 | } | |
618 | ||
619 | if (dif) { /* DIX/DIF Type 1, 2, 3 */ | |
620 | scmd->prot_flags |= SCSI_PROT_TRANSFER_PI; | |
621 | ||
622 | if (bio_integrity_flagged(bio, BIP_DISK_NOCHECK)) | |
623 | protect = 3 << 5; /* Disable target PI checking */ | |
624 | else | |
625 | protect = 1 << 5; /* Enable target PI checking */ | |
35e1a5d9 MP |
626 | } |
627 | ||
628 | scsi_set_prot_op(scmd, prot_op); | |
629 | scsi_set_prot_type(scmd, dif); | |
c611529e MP |
630 | scmd->prot_flags &= sd_prot_flag_mask(prot_op); |
631 | ||
632 | return protect; | |
35e1a5d9 MP |
633 | } |
634 | ||
c98a0eb0 MP |
635 | static void sd_config_discard(struct scsi_disk *sdkp, unsigned int mode) |
636 | { | |
637 | struct request_queue *q = sdkp->disk->queue; | |
638 | unsigned int logical_block_size = sdkp->device->sector_size; | |
639 | unsigned int max_blocks = 0; | |
640 | ||
7985090a | 641 | q->limits.discard_zeroes_data = 0; |
39773722 MP |
642 | |
643 | /* | |
644 | * When LBPRZ is reported, discard alignment and granularity | |
645 | * must be fixed to the logical block size. Otherwise the block | |
646 | * layer will drop misaligned portions of the request which can | |
647 | * lead to data corruption. If LBPRZ is not set, we honor the | |
648 | * device preference. | |
649 | */ | |
650 | if (sdkp->lbprz) { | |
651 | q->limits.discard_alignment = 0; | |
6540a65d | 652 | q->limits.discard_granularity = logical_block_size; |
39773722 MP |
653 | } else { |
654 | q->limits.discard_alignment = sdkp->unmap_alignment * | |
655 | logical_block_size; | |
656 | q->limits.discard_granularity = | |
657 | max(sdkp->physical_block_size, | |
658 | sdkp->unmap_granularity * logical_block_size); | |
659 | } | |
c98a0eb0 | 660 | |
89730393 MP |
661 | sdkp->provisioning_mode = mode; |
662 | ||
c98a0eb0 MP |
663 | switch (mode) { |
664 | ||
665 | case SD_LBP_DISABLE: | |
2bb4cd5c | 666 | blk_queue_max_discard_sectors(q, 0); |
c98a0eb0 MP |
667 | queue_flag_clear_unlocked(QUEUE_FLAG_DISCARD, q); |
668 | return; | |
669 | ||
670 | case SD_LBP_UNMAP: | |
5db44863 MP |
671 | max_blocks = min_not_zero(sdkp->max_unmap_blocks, |
672 | (u32)SD_MAX_WS16_BLOCKS); | |
c98a0eb0 MP |
673 | break; |
674 | ||
675 | case SD_LBP_WS16: | |
5db44863 MP |
676 | max_blocks = min_not_zero(sdkp->max_ws_blocks, |
677 | (u32)SD_MAX_WS16_BLOCKS); | |
7985090a | 678 | q->limits.discard_zeroes_data = sdkp->lbprz; |
c98a0eb0 MP |
679 | break; |
680 | ||
681 | case SD_LBP_WS10: | |
5db44863 MP |
682 | max_blocks = min_not_zero(sdkp->max_ws_blocks, |
683 | (u32)SD_MAX_WS10_BLOCKS); | |
7985090a | 684 | q->limits.discard_zeroes_data = sdkp->lbprz; |
c98a0eb0 MP |
685 | break; |
686 | ||
687 | case SD_LBP_ZERO: | |
5db44863 MP |
688 | max_blocks = min_not_zero(sdkp->max_ws_blocks, |
689 | (u32)SD_MAX_WS10_BLOCKS); | |
c98a0eb0 MP |
690 | q->limits.discard_zeroes_data = 1; |
691 | break; | |
692 | } | |
693 | ||
2bb4cd5c | 694 | blk_queue_max_discard_sectors(q, max_blocks * (logical_block_size >> 9)); |
c98a0eb0 | 695 | queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, q); |
c98a0eb0 MP |
696 | } |
697 | ||
e339c1a7 | 698 | /** |
26e85fcd | 699 | * sd_setup_discard_cmnd - unmap blocks on thinly provisioned device |
66ac0280 | 700 | * @sdp: scsi device to operate one |
e339c1a7 MP |
701 | * @rq: Request to prepare |
702 | * | |
703 | * Will issue either UNMAP or WRITE SAME(16) depending on preference | |
704 | * indicated by target device. | |
705 | **/ | |
6a7b4398 | 706 | static int sd_setup_discard_cmnd(struct scsi_cmnd *cmd) |
e339c1a7 | 707 | { |
6a7b4398 CH |
708 | struct request *rq = cmd->request; |
709 | struct scsi_device *sdp = cmd->device; | |
e339c1a7 | 710 | struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); |
26e85fcd MP |
711 | sector_t sector = blk_rq_pos(rq); |
712 | unsigned int nr_sectors = blk_rq_sectors(rq); | |
713 | unsigned int nr_bytes = blk_rq_bytes(rq); | |
66ac0280 | 714 | unsigned int len; |
f1126e95 | 715 | int ret; |
c98a0eb0 | 716 | char *buf; |
66ac0280 | 717 | struct page *page; |
e339c1a7 | 718 | |
26e85fcd MP |
719 | sector >>= ilog2(sdp->sector_size) - 9; |
720 | nr_sectors >>= ilog2(sdp->sector_size) - 9; | |
e339c1a7 | 721 | |
66ac0280 CH |
722 | page = alloc_page(GFP_ATOMIC | __GFP_ZERO); |
723 | if (!page) | |
724 | return BLKPREP_DEFER; | |
725 | ||
c98a0eb0 MP |
726 | switch (sdkp->provisioning_mode) { |
727 | case SD_LBP_UNMAP: | |
728 | buf = page_address(page); | |
e339c1a7 | 729 | |
6a7b4398 CH |
730 | cmd->cmd_len = 10; |
731 | cmd->cmnd[0] = UNMAP; | |
732 | cmd->cmnd[8] = 24; | |
e339c1a7 MP |
733 | |
734 | put_unaligned_be16(6 + 16, &buf[0]); | |
735 | put_unaligned_be16(16, &buf[2]); | |
736 | put_unaligned_be64(sector, &buf[8]); | |
66ac0280 | 737 | put_unaligned_be32(nr_sectors, &buf[16]); |
e339c1a7 | 738 | |
66ac0280 | 739 | len = 24; |
c98a0eb0 MP |
740 | break; |
741 | ||
742 | case SD_LBP_WS16: | |
6a7b4398 CH |
743 | cmd->cmd_len = 16; |
744 | cmd->cmnd[0] = WRITE_SAME_16; | |
745 | cmd->cmnd[1] = 0x8; /* UNMAP */ | |
746 | put_unaligned_be64(sector, &cmd->cmnd[2]); | |
747 | put_unaligned_be32(nr_sectors, &cmd->cmnd[10]); | |
66ac0280 CH |
748 | |
749 | len = sdkp->device->sector_size; | |
c98a0eb0 MP |
750 | break; |
751 | ||
752 | case SD_LBP_WS10: | |
753 | case SD_LBP_ZERO: | |
6a7b4398 CH |
754 | cmd->cmd_len = 10; |
755 | cmd->cmnd[0] = WRITE_SAME; | |
c98a0eb0 | 756 | if (sdkp->provisioning_mode == SD_LBP_WS10) |
6a7b4398 CH |
757 | cmd->cmnd[1] = 0x8; /* UNMAP */ |
758 | put_unaligned_be32(sector, &cmd->cmnd[2]); | |
759 | put_unaligned_be16(nr_sectors, &cmd->cmnd[7]); | |
c98a0eb0 MP |
760 | |
761 | len = sdkp->device->sector_size; | |
762 | break; | |
763 | ||
764 | default: | |
0fb5b1fb | 765 | ret = BLKPREP_INVALID; |
c98a0eb0 | 766 | goto out; |
e339c1a7 MP |
767 | } |
768 | ||
dc4a9307 | 769 | rq->completion_data = page; |
6a7b4398 CH |
770 | rq->timeout = SD_TIMEOUT; |
771 | ||
772 | cmd->transfersize = len; | |
e4200f8e | 773 | cmd->allowed = SD_MAX_RETRIES; |
6a7b4398 CH |
774 | |
775 | /* | |
776 | * Initially __data_len is set to the amount of data that needs to be | |
777 | * transferred to the target. This amount depends on whether WRITE SAME | |
778 | * or UNMAP is being used. After the scatterlist has been mapped by | |
779 | * scsi_init_io() we set __data_len to the size of the area to be | |
780 | * discarded on disk. This allows us to report completion on the full | |
781 | * amount of blocks described by the request. | |
782 | */ | |
37e58237 | 783 | blk_add_request_payload(rq, page, 0, len); |
3c356bde | 784 | ret = scsi_init_io(cmd); |
26e85fcd | 785 | rq->__data_len = nr_bytes; |
c98a0eb0 MP |
786 | |
787 | out: | |
b4f42e28 | 788 | if (ret != BLKPREP_OK) |
610a6349 | 789 | __free_page(page); |
f1126e95 FT |
790 | return ret; |
791 | } | |
792 | ||
5db44863 MP |
793 | static void sd_config_write_same(struct scsi_disk *sdkp) |
794 | { | |
795 | struct request_queue *q = sdkp->disk->queue; | |
796 | unsigned int logical_block_size = sdkp->device->sector_size; | |
5db44863 MP |
797 | |
798 | if (sdkp->device->no_write_same) { | |
799 | sdkp->max_ws_blocks = 0; | |
800 | goto out; | |
801 | } | |
802 | ||
803 | /* Some devices can not handle block counts above 0xffff despite | |
804 | * supporting WRITE SAME(16). Consequently we default to 64k | |
805 | * blocks per I/O unless the device explicitly advertises a | |
806 | * bigger limit. | |
807 | */ | |
66c28f97 MP |
808 | if (sdkp->max_ws_blocks > SD_MAX_WS10_BLOCKS) |
809 | sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks, | |
810 | (u32)SD_MAX_WS16_BLOCKS); | |
811 | else if (sdkp->ws16 || sdkp->ws10 || sdkp->device->no_report_opcodes) | |
812 | sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks, | |
813 | (u32)SD_MAX_WS10_BLOCKS); | |
814 | else { | |
815 | sdkp->device->no_write_same = 1; | |
816 | sdkp->max_ws_blocks = 0; | |
817 | } | |
5db44863 MP |
818 | |
819 | out: | |
66c28f97 MP |
820 | blk_queue_max_write_same_sectors(q, sdkp->max_ws_blocks * |
821 | (logical_block_size >> 9)); | |
5db44863 MP |
822 | } |
823 | ||
824 | /** | |
825 | * sd_setup_write_same_cmnd - write the same data to multiple blocks | |
59b1134c | 826 | * @cmd: command to prepare |
5db44863 MP |
827 | * |
828 | * Will issue either WRITE SAME(10) or WRITE SAME(16) depending on | |
829 | * preference indicated by target device. | |
830 | **/ | |
59b1134c | 831 | static int sd_setup_write_same_cmnd(struct scsi_cmnd *cmd) |
5db44863 | 832 | { |
59b1134c CH |
833 | struct request *rq = cmd->request; |
834 | struct scsi_device *sdp = cmd->device; | |
5db44863 MP |
835 | struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); |
836 | struct bio *bio = rq->bio; | |
837 | sector_t sector = blk_rq_pos(rq); | |
838 | unsigned int nr_sectors = blk_rq_sectors(rq); | |
839 | unsigned int nr_bytes = blk_rq_bytes(rq); | |
840 | int ret; | |
841 | ||
842 | if (sdkp->device->no_write_same) | |
0fb5b1fb | 843 | return BLKPREP_INVALID; |
5db44863 | 844 | |
a4ad39b1 | 845 | BUG_ON(bio_offset(bio) || bio_iovec(bio).bv_len != sdp->sector_size); |
5db44863 MP |
846 | |
847 | sector >>= ilog2(sdp->sector_size) - 9; | |
848 | nr_sectors >>= ilog2(sdp->sector_size) - 9; | |
849 | ||
5db44863 | 850 | rq->timeout = SD_WRITE_SAME_TIMEOUT; |
5db44863 MP |
851 | |
852 | if (sdkp->ws16 || sector > 0xffffffff || nr_sectors > 0xffff) { | |
59b1134c CH |
853 | cmd->cmd_len = 16; |
854 | cmd->cmnd[0] = WRITE_SAME_16; | |
855 | put_unaligned_be64(sector, &cmd->cmnd[2]); | |
856 | put_unaligned_be32(nr_sectors, &cmd->cmnd[10]); | |
5db44863 | 857 | } else { |
59b1134c CH |
858 | cmd->cmd_len = 10; |
859 | cmd->cmnd[0] = WRITE_SAME; | |
860 | put_unaligned_be32(sector, &cmd->cmnd[2]); | |
861 | put_unaligned_be16(nr_sectors, &cmd->cmnd[7]); | |
5db44863 MP |
862 | } |
863 | ||
59b1134c | 864 | cmd->transfersize = sdp->sector_size; |
a25ee548 | 865 | cmd->allowed = SD_MAX_RETRIES; |
5db44863 | 866 | |
59b1134c CH |
867 | /* |
868 | * For WRITE_SAME the data transferred in the DATA IN buffer is | |
869 | * different from the amount of data actually written to the target. | |
870 | * | |
871 | * We set up __data_len to the amount of data transferred from the | |
872 | * DATA IN buffer so that blk_rq_map_sg set up the proper S/G list | |
873 | * to transfer a single sector of data first, but then reset it to | |
874 | * the amount of data to be written right after so that the I/O path | |
875 | * knows how much to actually write. | |
876 | */ | |
877 | rq->__data_len = sdp->sector_size; | |
3c356bde | 878 | ret = scsi_init_io(cmd); |
59b1134c | 879 | rq->__data_len = nr_bytes; |
5db44863 MP |
880 | return ret; |
881 | } | |
882 | ||
a118c6c1 | 883 | static int sd_setup_flush_cmnd(struct scsi_cmnd *cmd) |
90467c29 | 884 | { |
a118c6c1 CH |
885 | struct request *rq = cmd->request; |
886 | ||
887 | /* flush requests don't perform I/O, zero the S/G table */ | |
888 | memset(&cmd->sdb, 0, sizeof(cmd->sdb)); | |
90467c29 | 889 | |
a118c6c1 CH |
890 | cmd->cmnd[0] = SYNCHRONIZE_CACHE; |
891 | cmd->cmd_len = 10; | |
892 | cmd->transfersize = 0; | |
893 | cmd->allowed = SD_MAX_RETRIES; | |
894 | ||
26b9fd8b | 895 | rq->timeout = rq->q->rq_timeout * SD_FLUSH_TIMEOUT_MULTIPLIER; |
a118c6c1 | 896 | return BLKPREP_OK; |
90467c29 FT |
897 | } |
898 | ||
87949eee | 899 | static int sd_setup_read_write_cmnd(struct scsi_cmnd *SCpnt) |
1da177e4 | 900 | { |
a1b73fc1 CH |
901 | struct request *rq = SCpnt->request; |
902 | struct scsi_device *sdp = SCpnt->device; | |
776b23a0 | 903 | struct gendisk *disk = rq->rq_disk; |
af55ff67 | 904 | struct scsi_disk *sdkp; |
83096ebf | 905 | sector_t block = blk_rq_pos(rq); |
18351070 | 906 | sector_t threshold; |
83096ebf | 907 | unsigned int this_count = blk_rq_sectors(rq); |
c611529e MP |
908 | unsigned int dif, dix; |
909 | int ret; | |
4e7392ec | 910 | unsigned char protect; |
7f9a6bc4 | 911 | |
3c356bde | 912 | ret = scsi_init_io(SCpnt); |
7f9a6bc4 JB |
913 | if (ret != BLKPREP_OK) |
914 | goto out; | |
915 | SCpnt = rq->special; | |
af55ff67 | 916 | sdkp = scsi_disk(disk); |
7f9a6bc4 JB |
917 | |
918 | /* from here on until we're complete, any goto out | |
919 | * is used for a killable error condition */ | |
920 | ret = BLKPREP_KILL; | |
1da177e4 | 921 | |
a1b73fc1 CH |
922 | SCSI_LOG_HLQUEUE(1, |
923 | scmd_printk(KERN_INFO, SCpnt, | |
924 | "%s: block=%llu, count=%d\n", | |
925 | __func__, (unsigned long long)block, this_count)); | |
1da177e4 LT |
926 | |
927 | if (!sdp || !scsi_device_online(sdp) || | |
83096ebf | 928 | block + blk_rq_sectors(rq) > get_capacity(disk)) { |
fa0d34be | 929 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
83096ebf TH |
930 | "Finishing %u sectors\n", |
931 | blk_rq_sectors(rq))); | |
fa0d34be MP |
932 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
933 | "Retry with 0x%p\n", SCpnt)); | |
7f9a6bc4 | 934 | goto out; |
1da177e4 LT |
935 | } |
936 | ||
937 | if (sdp->changed) { | |
938 | /* | |
939 | * quietly refuse to do anything to a changed disc until | |
940 | * the changed bit has been reset | |
941 | */ | |
3ff5588d | 942 | /* printk("SCSI disk has been changed or is not present. Prohibiting further I/O.\n"); */ |
7f9a6bc4 | 943 | goto out; |
1da177e4 | 944 | } |
7f9a6bc4 | 945 | |
a0899d4d | 946 | /* |
18351070 LT |
947 | * Some SD card readers can't handle multi-sector accesses which touch |
948 | * the last one or two hardware sectors. Split accesses as needed. | |
a0899d4d | 949 | */ |
18351070 LT |
950 | threshold = get_capacity(disk) - SD_LAST_BUGGY_SECTORS * |
951 | (sdp->sector_size / 512); | |
952 | ||
953 | if (unlikely(sdp->last_sector_bug && block + this_count > threshold)) { | |
954 | if (block < threshold) { | |
955 | /* Access up to the threshold but not beyond */ | |
956 | this_count = threshold - block; | |
957 | } else { | |
958 | /* Access only a single hardware sector */ | |
959 | this_count = sdp->sector_size / 512; | |
960 | } | |
961 | } | |
a0899d4d | 962 | |
fa0d34be MP |
963 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, "block=%llu\n", |
964 | (unsigned long long)block)); | |
1da177e4 LT |
965 | |
966 | /* | |
967 | * If we have a 1K hardware sectorsize, prevent access to single | |
968 | * 512 byte sectors. In theory we could handle this - in fact | |
969 | * the scsi cdrom driver must be able to handle this because | |
970 | * we typically use 1K blocksizes, and cdroms typically have | |
971 | * 2K hardware sectorsizes. Of course, things are simpler | |
972 | * with the cdrom, since it is read-only. For performance | |
973 | * reasons, the filesystems should be able to handle this | |
974 | * and not force the scsi disk driver to use bounce buffers | |
975 | * for this. | |
976 | */ | |
977 | if (sdp->sector_size == 1024) { | |
83096ebf | 978 | if ((block & 1) || (blk_rq_sectors(rq) & 1)) { |
e73aec82 MP |
979 | scmd_printk(KERN_ERR, SCpnt, |
980 | "Bad block number requested\n"); | |
7f9a6bc4 | 981 | goto out; |
1da177e4 LT |
982 | } else { |
983 | block = block >> 1; | |
984 | this_count = this_count >> 1; | |
985 | } | |
986 | } | |
987 | if (sdp->sector_size == 2048) { | |
83096ebf | 988 | if ((block & 3) || (blk_rq_sectors(rq) & 3)) { |
e73aec82 MP |
989 | scmd_printk(KERN_ERR, SCpnt, |
990 | "Bad block number requested\n"); | |
7f9a6bc4 | 991 | goto out; |
1da177e4 LT |
992 | } else { |
993 | block = block >> 2; | |
994 | this_count = this_count >> 2; | |
995 | } | |
996 | } | |
997 | if (sdp->sector_size == 4096) { | |
83096ebf | 998 | if ((block & 7) || (blk_rq_sectors(rq) & 7)) { |
e73aec82 MP |
999 | scmd_printk(KERN_ERR, SCpnt, |
1000 | "Bad block number requested\n"); | |
7f9a6bc4 | 1001 | goto out; |
1da177e4 LT |
1002 | } else { |
1003 | block = block >> 3; | |
1004 | this_count = this_count >> 3; | |
1005 | } | |
1006 | } | |
1007 | if (rq_data_dir(rq) == WRITE) { | |
1da177e4 | 1008 | SCpnt->cmnd[0] = WRITE_6; |
af55ff67 | 1009 | |
8c579ab6 | 1010 | if (blk_integrity_rq(rq)) |
c611529e | 1011 | sd_dif_prepare(SCpnt); |
af55ff67 | 1012 | |
1da177e4 LT |
1013 | } else if (rq_data_dir(rq) == READ) { |
1014 | SCpnt->cmnd[0] = READ_6; | |
1da177e4 | 1015 | } else { |
4e1b2d52 | 1016 | scmd_printk(KERN_ERR, SCpnt, "Unknown command %llu,%llx\n", |
c2df40df | 1017 | req_op(rq), (unsigned long long) rq->cmd_flags); |
7f9a6bc4 | 1018 | goto out; |
1da177e4 LT |
1019 | } |
1020 | ||
fa0d34be | 1021 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
83096ebf | 1022 | "%s %d/%u 512 byte blocks.\n", |
fa0d34be MP |
1023 | (rq_data_dir(rq) == WRITE) ? |
1024 | "writing" : "reading", this_count, | |
83096ebf | 1025 | blk_rq_sectors(rq))); |
1da177e4 | 1026 | |
c611529e MP |
1027 | dix = scsi_prot_sg_count(SCpnt); |
1028 | dif = scsi_host_dif_capable(SCpnt->device->host, sdkp->protection_type); | |
1029 | ||
1030 | if (dif || dix) | |
1031 | protect = sd_setup_protect_cmnd(SCpnt, dix, dif); | |
af55ff67 | 1032 | else |
4e7392ec MP |
1033 | protect = 0; |
1034 | ||
8475c811 | 1035 | if (protect && sdkp->protection_type == T10_PI_TYPE2_PROTECTION) { |
4e7392ec MP |
1036 | SCpnt->cmnd = mempool_alloc(sd_cdb_pool, GFP_ATOMIC); |
1037 | ||
1038 | if (unlikely(SCpnt->cmnd == NULL)) { | |
1039 | ret = BLKPREP_DEFER; | |
1040 | goto out; | |
1041 | } | |
af55ff67 | 1042 | |
4e7392ec MP |
1043 | SCpnt->cmd_len = SD_EXT_CDB_SIZE; |
1044 | memset(SCpnt->cmnd, 0, SCpnt->cmd_len); | |
1045 | SCpnt->cmnd[0] = VARIABLE_LENGTH_CMD; | |
1046 | SCpnt->cmnd[7] = 0x18; | |
1047 | SCpnt->cmnd[9] = (rq_data_dir(rq) == READ) ? READ_32 : WRITE_32; | |
33659ebb | 1048 | SCpnt->cmnd[10] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
4e7392ec MP |
1049 | |
1050 | /* LBA */ | |
1051 | SCpnt->cmnd[12] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0; | |
1052 | SCpnt->cmnd[13] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0; | |
1053 | SCpnt->cmnd[14] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0; | |
1054 | SCpnt->cmnd[15] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0; | |
1055 | SCpnt->cmnd[16] = (unsigned char) (block >> 24) & 0xff; | |
1056 | SCpnt->cmnd[17] = (unsigned char) (block >> 16) & 0xff; | |
1057 | SCpnt->cmnd[18] = (unsigned char) (block >> 8) & 0xff; | |
1058 | SCpnt->cmnd[19] = (unsigned char) block & 0xff; | |
1059 | ||
1060 | /* Expected Indirect LBA */ | |
1061 | SCpnt->cmnd[20] = (unsigned char) (block >> 24) & 0xff; | |
1062 | SCpnt->cmnd[21] = (unsigned char) (block >> 16) & 0xff; | |
1063 | SCpnt->cmnd[22] = (unsigned char) (block >> 8) & 0xff; | |
1064 | SCpnt->cmnd[23] = (unsigned char) block & 0xff; | |
1065 | ||
1066 | /* Transfer length */ | |
1067 | SCpnt->cmnd[28] = (unsigned char) (this_count >> 24) & 0xff; | |
1068 | SCpnt->cmnd[29] = (unsigned char) (this_count >> 16) & 0xff; | |
1069 | SCpnt->cmnd[30] = (unsigned char) (this_count >> 8) & 0xff; | |
1070 | SCpnt->cmnd[31] = (unsigned char) this_count & 0xff; | |
e430cbc8 | 1071 | } else if (sdp->use_16_for_rw || (this_count > 0xffff)) { |
1da177e4 | 1072 | SCpnt->cmnd[0] += READ_16 - READ_6; |
33659ebb | 1073 | SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
1da177e4 LT |
1074 | SCpnt->cmnd[2] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0; |
1075 | SCpnt->cmnd[3] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0; | |
1076 | SCpnt->cmnd[4] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0; | |
1077 | SCpnt->cmnd[5] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0; | |
1078 | SCpnt->cmnd[6] = (unsigned char) (block >> 24) & 0xff; | |
1079 | SCpnt->cmnd[7] = (unsigned char) (block >> 16) & 0xff; | |
1080 | SCpnt->cmnd[8] = (unsigned char) (block >> 8) & 0xff; | |
1081 | SCpnt->cmnd[9] = (unsigned char) block & 0xff; | |
1082 | SCpnt->cmnd[10] = (unsigned char) (this_count >> 24) & 0xff; | |
1083 | SCpnt->cmnd[11] = (unsigned char) (this_count >> 16) & 0xff; | |
1084 | SCpnt->cmnd[12] = (unsigned char) (this_count >> 8) & 0xff; | |
1085 | SCpnt->cmnd[13] = (unsigned char) this_count & 0xff; | |
1086 | SCpnt->cmnd[14] = SCpnt->cmnd[15] = 0; | |
1087 | } else if ((this_count > 0xff) || (block > 0x1fffff) || | |
af55ff67 | 1088 | scsi_device_protection(SCpnt->device) || |
1da177e4 | 1089 | SCpnt->device->use_10_for_rw) { |
1da177e4 | 1090 | SCpnt->cmnd[0] += READ_10 - READ_6; |
33659ebb | 1091 | SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
1da177e4 LT |
1092 | SCpnt->cmnd[2] = (unsigned char) (block >> 24) & 0xff; |
1093 | SCpnt->cmnd[3] = (unsigned char) (block >> 16) & 0xff; | |
1094 | SCpnt->cmnd[4] = (unsigned char) (block >> 8) & 0xff; | |
1095 | SCpnt->cmnd[5] = (unsigned char) block & 0xff; | |
1096 | SCpnt->cmnd[6] = SCpnt->cmnd[9] = 0; | |
1097 | SCpnt->cmnd[7] = (unsigned char) (this_count >> 8) & 0xff; | |
1098 | SCpnt->cmnd[8] = (unsigned char) this_count & 0xff; | |
1099 | } else { | |
33659ebb | 1100 | if (unlikely(rq->cmd_flags & REQ_FUA)) { |
007365ad TH |
1101 | /* |
1102 | * This happens only if this drive failed | |
1103 | * 10byte rw command with ILLEGAL_REQUEST | |
1104 | * during operation and thus turned off | |
1105 | * use_10_for_rw. | |
1106 | */ | |
e73aec82 MP |
1107 | scmd_printk(KERN_ERR, SCpnt, |
1108 | "FUA write on READ/WRITE(6) drive\n"); | |
7f9a6bc4 | 1109 | goto out; |
007365ad TH |
1110 | } |
1111 | ||
1da177e4 LT |
1112 | SCpnt->cmnd[1] |= (unsigned char) ((block >> 16) & 0x1f); |
1113 | SCpnt->cmnd[2] = (unsigned char) ((block >> 8) & 0xff); | |
1114 | SCpnt->cmnd[3] = (unsigned char) block & 0xff; | |
1115 | SCpnt->cmnd[4] = (unsigned char) this_count; | |
1116 | SCpnt->cmnd[5] = 0; | |
1117 | } | |
30b0c37b | 1118 | SCpnt->sdb.length = this_count * sdp->sector_size; |
1da177e4 LT |
1119 | |
1120 | /* | |
1121 | * We shouldn't disconnect in the middle of a sector, so with a dumb | |
1122 | * host adapter, it's safe to assume that we can at least transfer | |
1123 | * this many bytes between each connect / disconnect. | |
1124 | */ | |
1125 | SCpnt->transfersize = sdp->sector_size; | |
1126 | SCpnt->underflow = this_count << 9; | |
1127 | SCpnt->allowed = SD_MAX_RETRIES; | |
1da177e4 | 1128 | |
1da177e4 LT |
1129 | /* |
1130 | * This indicates that the command is ready from our end to be | |
1131 | * queued. | |
1132 | */ | |
7f9a6bc4 JB |
1133 | ret = BLKPREP_OK; |
1134 | out: | |
a1b73fc1 | 1135 | return ret; |
1da177e4 LT |
1136 | } |
1137 | ||
87949eee CH |
1138 | static int sd_init_command(struct scsi_cmnd *cmd) |
1139 | { | |
1140 | struct request *rq = cmd->request; | |
1141 | ||
c2df40df MC |
1142 | switch (req_op(rq)) { |
1143 | case REQ_OP_DISCARD: | |
87949eee | 1144 | return sd_setup_discard_cmnd(cmd); |
c2df40df | 1145 | case REQ_OP_WRITE_SAME: |
87949eee | 1146 | return sd_setup_write_same_cmnd(cmd); |
3a5e02ce | 1147 | case REQ_OP_FLUSH: |
87949eee | 1148 | return sd_setup_flush_cmnd(cmd); |
c2df40df MC |
1149 | case REQ_OP_READ: |
1150 | case REQ_OP_WRITE: | |
87949eee | 1151 | return sd_setup_read_write_cmnd(cmd); |
c2df40df MC |
1152 | default: |
1153 | BUG(); | |
1154 | } | |
87949eee CH |
1155 | } |
1156 | ||
1157 | static void sd_uninit_command(struct scsi_cmnd *SCpnt) | |
1158 | { | |
1159 | struct request *rq = SCpnt->request; | |
1160 | ||
c2df40df | 1161 | if (req_op(rq) == REQ_OP_DISCARD) |
87949eee CH |
1162 | __free_page(rq->completion_data); |
1163 | ||
1164 | if (SCpnt->cmnd != rq->cmd) { | |
1165 | mempool_free(SCpnt->cmnd, sd_cdb_pool); | |
1166 | SCpnt->cmnd = NULL; | |
1167 | SCpnt->cmd_len = 0; | |
1168 | } | |
1169 | } | |
1170 | ||
1da177e4 LT |
1171 | /** |
1172 | * sd_open - open a scsi disk device | |
1173 | * @inode: only i_rdev member may be used | |
1174 | * @filp: only f_mode and f_flags may be used | |
1175 | * | |
1176 | * Returns 0 if successful. Returns a negated errno value in case | |
1177 | * of error. | |
1178 | * | |
1179 | * Note: This can be called from a user context (e.g. fsck(1) ) | |
1180 | * or from within the kernel (e.g. as a result of a mount(1) ). | |
1181 | * In the latter case @inode and @filp carry an abridged amount | |
1182 | * of information as noted above. | |
409f3499 AB |
1183 | * |
1184 | * Locking: called with bdev->bd_mutex held. | |
1da177e4 | 1185 | **/ |
0338e291 | 1186 | static int sd_open(struct block_device *bdev, fmode_t mode) |
1da177e4 | 1187 | { |
0338e291 | 1188 | struct scsi_disk *sdkp = scsi_disk_get(bdev->bd_disk); |
1da177e4 LT |
1189 | struct scsi_device *sdev; |
1190 | int retval; | |
1191 | ||
0338e291 | 1192 | if (!sdkp) |
1da177e4 LT |
1193 | return -ENXIO; |
1194 | ||
fa0d34be | 1195 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_open\n")); |
1da177e4 LT |
1196 | |
1197 | sdev = sdkp->device; | |
1198 | ||
1199 | /* | |
1200 | * If the device is in error recovery, wait until it is done. | |
1201 | * If the device is offline, then disallow any access to it. | |
1202 | */ | |
1203 | retval = -ENXIO; | |
1204 | if (!scsi_block_when_processing_errors(sdev)) | |
1205 | goto error_out; | |
1206 | ||
1207 | if (sdev->removable || sdkp->write_prot) | |
0338e291 | 1208 | check_disk_change(bdev); |
1da177e4 LT |
1209 | |
1210 | /* | |
1211 | * If the drive is empty, just let the open fail. | |
1212 | */ | |
1213 | retval = -ENOMEDIUM; | |
0338e291 | 1214 | if (sdev->removable && !sdkp->media_present && !(mode & FMODE_NDELAY)) |
1da177e4 LT |
1215 | goto error_out; |
1216 | ||
1217 | /* | |
1218 | * If the device has the write protect tab set, have the open fail | |
1219 | * if the user expects to be able to write to the thing. | |
1220 | */ | |
1221 | retval = -EROFS; | |
0338e291 | 1222 | if (sdkp->write_prot && (mode & FMODE_WRITE)) |
1da177e4 LT |
1223 | goto error_out; |
1224 | ||
1225 | /* | |
1226 | * It is possible that the disk changing stuff resulted in | |
1227 | * the device being taken offline. If this is the case, | |
1228 | * report this to the user, and don't pretend that the | |
1229 | * open actually succeeded. | |
1230 | */ | |
1231 | retval = -ENXIO; | |
1232 | if (!scsi_device_online(sdev)) | |
1233 | goto error_out; | |
1234 | ||
409f3499 | 1235 | if ((atomic_inc_return(&sdkp->openers) == 1) && sdev->removable) { |
1da177e4 LT |
1236 | if (scsi_block_when_processing_errors(sdev)) |
1237 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT); | |
1238 | } | |
1239 | ||
1240 | return 0; | |
1241 | ||
1242 | error_out: | |
1243 | scsi_disk_put(sdkp); | |
1244 | return retval; | |
1245 | } | |
1246 | ||
1247 | /** | |
1248 | * sd_release - invoked when the (last) close(2) is called on this | |
1249 | * scsi disk. | |
1250 | * @inode: only i_rdev member may be used | |
1251 | * @filp: only f_mode and f_flags may be used | |
1252 | * | |
1253 | * Returns 0. | |
1254 | * | |
1255 | * Note: may block (uninterruptible) if error recovery is underway | |
1256 | * on this disk. | |
409f3499 AB |
1257 | * |
1258 | * Locking: called with bdev->bd_mutex held. | |
1da177e4 | 1259 | **/ |
db2a144b | 1260 | static void sd_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 1261 | { |
1da177e4 LT |
1262 | struct scsi_disk *sdkp = scsi_disk(disk); |
1263 | struct scsi_device *sdev = sdkp->device; | |
1264 | ||
56937f7b | 1265 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_release\n")); |
1da177e4 | 1266 | |
7e443312 | 1267 | if (atomic_dec_return(&sdkp->openers) == 0 && sdev->removable) { |
1da177e4 LT |
1268 | if (scsi_block_when_processing_errors(sdev)) |
1269 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW); | |
1270 | } | |
1271 | ||
1272 | /* | |
1273 | * XXX and what if there are packets in flight and this close() | |
1274 | * XXX is followed by a "rmmod sd_mod"? | |
1275 | */ | |
478a8a05 | 1276 | |
1da177e4 | 1277 | scsi_disk_put(sdkp); |
1da177e4 LT |
1278 | } |
1279 | ||
a885c8c4 | 1280 | static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
1da177e4 LT |
1281 | { |
1282 | struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk); | |
1283 | struct scsi_device *sdp = sdkp->device; | |
1284 | struct Scsi_Host *host = sdp->host; | |
f08bb1e0 | 1285 | sector_t capacity = logical_to_sectors(sdp, sdkp->capacity); |
1da177e4 LT |
1286 | int diskinfo[4]; |
1287 | ||
1288 | /* default to most commonly used values */ | |
f08bb1e0 MP |
1289 | diskinfo[0] = 0x40; /* 1 << 6 */ |
1290 | diskinfo[1] = 0x20; /* 1 << 5 */ | |
1291 | diskinfo[2] = capacity >> 11; | |
1292 | ||
1da177e4 LT |
1293 | /* override with calculated, extended default, or driver values */ |
1294 | if (host->hostt->bios_param) | |
f08bb1e0 | 1295 | host->hostt->bios_param(sdp, bdev, capacity, diskinfo); |
1da177e4 | 1296 | else |
f08bb1e0 | 1297 | scsicam_bios_param(bdev, capacity, diskinfo); |
1da177e4 | 1298 | |
a885c8c4 CH |
1299 | geo->heads = diskinfo[0]; |
1300 | geo->sectors = diskinfo[1]; | |
1301 | geo->cylinders = diskinfo[2]; | |
1da177e4 LT |
1302 | return 0; |
1303 | } | |
1304 | ||
1305 | /** | |
1306 | * sd_ioctl - process an ioctl | |
1307 | * @inode: only i_rdev/i_bdev members may be used | |
1308 | * @filp: only f_mode and f_flags may be used | |
1309 | * @cmd: ioctl command number | |
1310 | * @arg: this is third argument given to ioctl(2) system call. | |
1311 | * Often contains a pointer. | |
1312 | * | |
25985edc | 1313 | * Returns 0 if successful (some ioctls return positive numbers on |
1da177e4 LT |
1314 | * success as well). Returns a negated errno value in case of error. |
1315 | * | |
1316 | * Note: most ioctls are forward onto the block subsystem or further | |
3a4fa0a2 | 1317 | * down in the scsi subsystem. |
1da177e4 | 1318 | **/ |
0338e291 | 1319 | static int sd_ioctl(struct block_device *bdev, fmode_t mode, |
1da177e4 LT |
1320 | unsigned int cmd, unsigned long arg) |
1321 | { | |
1da177e4 | 1322 | struct gendisk *disk = bdev->bd_disk; |
fe2d1851 NN |
1323 | struct scsi_disk *sdkp = scsi_disk(disk); |
1324 | struct scsi_device *sdp = sdkp->device; | |
1da177e4 LT |
1325 | void __user *p = (void __user *)arg; |
1326 | int error; | |
1327 | ||
fe2d1851 NN |
1328 | SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO, sdkp, "sd_ioctl: disk=%s, " |
1329 | "cmd=0x%x\n", disk->disk_name, cmd)); | |
1da177e4 | 1330 | |
0bfc96cb PB |
1331 | error = scsi_verify_blk_ioctl(bdev, cmd); |
1332 | if (error < 0) | |
1333 | return error; | |
1334 | ||
1da177e4 LT |
1335 | /* |
1336 | * If we are in the middle of error recovery, don't let anyone | |
1337 | * else try and use this device. Also, if error recovery fails, it | |
1338 | * may try and take the device offline, in which case all further | |
1339 | * access to the device is prohibited. | |
1340 | */ | |
906d15fb CH |
1341 | error = scsi_ioctl_block_when_processing_errors(sdp, cmd, |
1342 | (mode & FMODE_NDELAY) != 0); | |
1343 | if (error) | |
8a6cfeb6 | 1344 | goto out; |
1da177e4 | 1345 | |
1da177e4 LT |
1346 | /* |
1347 | * Send SCSI addressing ioctls directly to mid level, send other | |
1348 | * ioctls to block level and then onto mid level if they can't be | |
1349 | * resolved. | |
1350 | */ | |
1351 | switch (cmd) { | |
1352 | case SCSI_IOCTL_GET_IDLUN: | |
1353 | case SCSI_IOCTL_GET_BUS_NUMBER: | |
8a6cfeb6 AB |
1354 | error = scsi_ioctl(sdp, cmd, p); |
1355 | break; | |
1da177e4 | 1356 | default: |
577ebb37 | 1357 | error = scsi_cmd_blk_ioctl(bdev, mode, cmd, p); |
1da177e4 | 1358 | if (error != -ENOTTY) |
8a6cfeb6 AB |
1359 | break; |
1360 | error = scsi_ioctl(sdp, cmd, p); | |
1361 | break; | |
1da177e4 | 1362 | } |
8a6cfeb6 | 1363 | out: |
8a6cfeb6 | 1364 | return error; |
1da177e4 LT |
1365 | } |
1366 | ||
1367 | static void set_media_not_present(struct scsi_disk *sdkp) | |
1368 | { | |
2bae0093 TH |
1369 | if (sdkp->media_present) |
1370 | sdkp->device->changed = 1; | |
1371 | ||
1372 | if (sdkp->device->removable) { | |
1373 | sdkp->media_present = 0; | |
1374 | sdkp->capacity = 0; | |
1375 | } | |
1376 | } | |
1377 | ||
1378 | static int media_not_present(struct scsi_disk *sdkp, | |
1379 | struct scsi_sense_hdr *sshdr) | |
1380 | { | |
1381 | if (!scsi_sense_valid(sshdr)) | |
1382 | return 0; | |
1383 | ||
1384 | /* not invoked for commands that could return deferred errors */ | |
1385 | switch (sshdr->sense_key) { | |
1386 | case UNIT_ATTENTION: | |
1387 | case NOT_READY: | |
1388 | /* medium not present */ | |
1389 | if (sshdr->asc == 0x3A) { | |
1390 | set_media_not_present(sdkp); | |
1391 | return 1; | |
1392 | } | |
1393 | } | |
1394 | return 0; | |
1da177e4 LT |
1395 | } |
1396 | ||
1397 | /** | |
2bae0093 TH |
1398 | * sd_check_events - check media events |
1399 | * @disk: kernel device descriptor | |
1400 | * @clearing: disk events currently being cleared | |
1da177e4 | 1401 | * |
2bae0093 | 1402 | * Returns mask of DISK_EVENT_*. |
1da177e4 LT |
1403 | * |
1404 | * Note: this function is invoked from the block subsystem. | |
1405 | **/ | |
2bae0093 | 1406 | static unsigned int sd_check_events(struct gendisk *disk, unsigned int clearing) |
1da177e4 | 1407 | { |
eb72d0bb HR |
1408 | struct scsi_disk *sdkp = scsi_disk_get(disk); |
1409 | struct scsi_device *sdp; | |
001aac25 | 1410 | struct scsi_sense_hdr *sshdr = NULL; |
1da177e4 LT |
1411 | int retval; |
1412 | ||
eb72d0bb HR |
1413 | if (!sdkp) |
1414 | return 0; | |
1415 | ||
1416 | sdp = sdkp->device; | |
2bae0093 | 1417 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_check_events\n")); |
1da177e4 LT |
1418 | |
1419 | /* | |
1420 | * If the device is offline, don't send any commands - just pretend as | |
1421 | * if the command failed. If the device ever comes back online, we | |
1422 | * can deal with it then. It is only because of unrecoverable errors | |
1423 | * that we would ever take a device offline in the first place. | |
1424 | */ | |
285e9670 KS |
1425 | if (!scsi_device_online(sdp)) { |
1426 | set_media_not_present(sdkp); | |
285e9670 KS |
1427 | goto out; |
1428 | } | |
1da177e4 LT |
1429 | |
1430 | /* | |
1431 | * Using TEST_UNIT_READY enables differentiation between drive with | |
1432 | * no cartridge loaded - NOT READY, drive with changed cartridge - | |
1433 | * UNIT ATTENTION, or with same cartridge - GOOD STATUS. | |
1434 | * | |
1435 | * Drives that auto spin down. eg iomega jaz 1G, will be started | |
1436 | * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever | |
1437 | * sd_revalidate() is called. | |
1438 | */ | |
1439 | retval = -ENODEV; | |
285e9670 | 1440 | |
001aac25 JB |
1441 | if (scsi_block_when_processing_errors(sdp)) { |
1442 | sshdr = kzalloc(sizeof(*sshdr), GFP_KERNEL); | |
1443 | retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, SD_MAX_RETRIES, | |
1444 | sshdr); | |
1445 | } | |
1da177e4 | 1446 | |
2bae0093 TH |
1447 | /* failed to execute TUR, assume media not present */ |
1448 | if (host_byte(retval)) { | |
285e9670 | 1449 | set_media_not_present(sdkp); |
285e9670 KS |
1450 | goto out; |
1451 | } | |
1da177e4 | 1452 | |
2bae0093 TH |
1453 | if (media_not_present(sdkp, sshdr)) |
1454 | goto out; | |
1455 | ||
1da177e4 LT |
1456 | /* |
1457 | * For removable scsi disk we have to recognise the presence | |
2bae0093 | 1458 | * of a disk in the drive. |
1da177e4 | 1459 | */ |
2bae0093 TH |
1460 | if (!sdkp->media_present) |
1461 | sdp->changed = 1; | |
1da177e4 | 1462 | sdkp->media_present = 1; |
285e9670 | 1463 | out: |
3ff5588d | 1464 | /* |
2bae0093 | 1465 | * sdp->changed is set under the following conditions: |
3ff5588d | 1466 | * |
2bae0093 TH |
1467 | * Medium present state has changed in either direction. |
1468 | * Device has indicated UNIT_ATTENTION. | |
3ff5588d | 1469 | */ |
001aac25 | 1470 | kfree(sshdr); |
2bae0093 TH |
1471 | retval = sdp->changed ? DISK_EVENT_MEDIA_CHANGE : 0; |
1472 | sdp->changed = 0; | |
eb72d0bb | 1473 | scsi_disk_put(sdkp); |
1da177e4 | 1474 | return retval; |
1da177e4 LT |
1475 | } |
1476 | ||
e73aec82 | 1477 | static int sd_sync_cache(struct scsi_disk *sdkp) |
1da177e4 | 1478 | { |
1da177e4 | 1479 | int retries, res; |
e73aec82 | 1480 | struct scsi_device *sdp = sdkp->device; |
7e660100 JB |
1481 | const int timeout = sdp->request_queue->rq_timeout |
1482 | * SD_FLUSH_TIMEOUT_MULTIPLIER; | |
ea73a9f2 | 1483 | struct scsi_sense_hdr sshdr; |
1da177e4 LT |
1484 | |
1485 | if (!scsi_device_online(sdp)) | |
1486 | return -ENODEV; | |
1487 | ||
1da177e4 LT |
1488 | for (retries = 3; retries > 0; --retries) { |
1489 | unsigned char cmd[10] = { 0 }; | |
1490 | ||
1491 | cmd[0] = SYNCHRONIZE_CACHE; | |
1492 | /* | |
1493 | * Leave the rest of the command zero to indicate | |
1494 | * flush everything. | |
1495 | */ | |
9b21493c | 1496 | res = scsi_execute_req_flags(sdp, cmd, DMA_NONE, NULL, 0, |
7e660100 JB |
1497 | &sshdr, timeout, SD_MAX_RETRIES, |
1498 | NULL, REQ_PM); | |
ea73a9f2 | 1499 | if (res == 0) |
1da177e4 LT |
1500 | break; |
1501 | } | |
1502 | ||
e73aec82 | 1503 | if (res) { |
ef61329d | 1504 | sd_print_result(sdkp, "Synchronize Cache(10) failed", res); |
95897910 | 1505 | |
e73aec82 MP |
1506 | if (driver_byte(res) & DRIVER_SENSE) |
1507 | sd_print_sense_hdr(sdkp, &sshdr); | |
95897910 ON |
1508 | /* we need to evaluate the error return */ |
1509 | if (scsi_sense_valid(&sshdr) && | |
7aae5134 AS |
1510 | (sshdr.asc == 0x3a || /* medium not present */ |
1511 | sshdr.asc == 0x20)) /* invalid command */ | |
95897910 ON |
1512 | /* this is no error here */ |
1513 | return 0; | |
1514 | ||
1515 | switch (host_byte(res)) { | |
1516 | /* ignore errors due to racing a disconnection */ | |
1517 | case DID_BAD_TARGET: | |
1518 | case DID_NO_CONNECT: | |
1519 | return 0; | |
1520 | /* signal the upper layer it might try again */ | |
1521 | case DID_BUS_BUSY: | |
1522 | case DID_IMM_RETRY: | |
1523 | case DID_REQUEUE: | |
1524 | case DID_SOFT_ERROR: | |
1525 | return -EBUSY; | |
1526 | default: | |
1527 | return -EIO; | |
1528 | } | |
1da177e4 | 1529 | } |
3721050a | 1530 | return 0; |
1da177e4 LT |
1531 | } |
1532 | ||
1da177e4 LT |
1533 | static void sd_rescan(struct device *dev) |
1534 | { | |
3d9a1f53 | 1535 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
39b7f1e2 | 1536 | |
3d9a1f53 | 1537 | revalidate_disk(sdkp->disk); |
1da177e4 LT |
1538 | } |
1539 | ||
1540 | ||
1541 | #ifdef CONFIG_COMPAT | |
1542 | /* | |
1543 | * This gets directly called from VFS. When the ioctl | |
1544 | * is not recognized we go back to the other translation paths. | |
1545 | */ | |
0338e291 AV |
1546 | static int sd_compat_ioctl(struct block_device *bdev, fmode_t mode, |
1547 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1548 | { |
0338e291 | 1549 | struct scsi_device *sdev = scsi_disk(bdev->bd_disk)->device; |
21a9d4c9 | 1550 | int error; |
1da177e4 | 1551 | |
21a9d4c9 CH |
1552 | error = scsi_ioctl_block_when_processing_errors(sdev, cmd, |
1553 | (mode & FMODE_NDELAY) != 0); | |
1554 | if (error) | |
1555 | return error; | |
1da177e4 | 1556 | |
1da177e4 LT |
1557 | /* |
1558 | * Let the static ioctl translation table take care of it. | |
1559 | */ | |
21a9d4c9 CH |
1560 | if (!sdev->host->hostt->compat_ioctl) |
1561 | return -ENOIOCTLCMD; | |
1562 | return sdev->host->hostt->compat_ioctl(sdev, cmd, (void __user *)arg); | |
1da177e4 LT |
1563 | } |
1564 | #endif | |
1565 | ||
924d55b0 CH |
1566 | static char sd_pr_type(enum pr_type type) |
1567 | { | |
1568 | switch (type) { | |
1569 | case PR_WRITE_EXCLUSIVE: | |
1570 | return 0x01; | |
1571 | case PR_EXCLUSIVE_ACCESS: | |
1572 | return 0x03; | |
1573 | case PR_WRITE_EXCLUSIVE_REG_ONLY: | |
1574 | return 0x05; | |
1575 | case PR_EXCLUSIVE_ACCESS_REG_ONLY: | |
1576 | return 0x06; | |
1577 | case PR_WRITE_EXCLUSIVE_ALL_REGS: | |
1578 | return 0x07; | |
1579 | case PR_EXCLUSIVE_ACCESS_ALL_REGS: | |
1580 | return 0x08; | |
1581 | default: | |
1582 | return 0; | |
1583 | } | |
1584 | }; | |
1585 | ||
1586 | static int sd_pr_command(struct block_device *bdev, u8 sa, | |
1587 | u64 key, u64 sa_key, u8 type, u8 flags) | |
1588 | { | |
1589 | struct scsi_device *sdev = scsi_disk(bdev->bd_disk)->device; | |
1590 | struct scsi_sense_hdr sshdr; | |
1591 | int result; | |
1592 | u8 cmd[16] = { 0, }; | |
1593 | u8 data[24] = { 0, }; | |
1594 | ||
1595 | cmd[0] = PERSISTENT_RESERVE_OUT; | |
1596 | cmd[1] = sa; | |
1597 | cmd[2] = type; | |
1598 | put_unaligned_be32(sizeof(data), &cmd[5]); | |
1599 | ||
1600 | put_unaligned_be64(key, &data[0]); | |
1601 | put_unaligned_be64(sa_key, &data[8]); | |
1602 | data[20] = flags; | |
1603 | ||
1604 | result = scsi_execute_req(sdev, cmd, DMA_TO_DEVICE, &data, sizeof(data), | |
1605 | &sshdr, SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
1606 | ||
1607 | if ((driver_byte(result) & DRIVER_SENSE) && | |
1608 | (scsi_sense_valid(&sshdr))) { | |
1609 | sdev_printk(KERN_INFO, sdev, "PR command failed: %d\n", result); | |
1610 | scsi_print_sense_hdr(sdev, NULL, &sshdr); | |
1611 | } | |
1612 | ||
1613 | return result; | |
1614 | } | |
1615 | ||
1616 | static int sd_pr_register(struct block_device *bdev, u64 old_key, u64 new_key, | |
1617 | u32 flags) | |
1618 | { | |
1619 | if (flags & ~PR_FL_IGNORE_KEY) | |
1620 | return -EOPNOTSUPP; | |
1621 | return sd_pr_command(bdev, (flags & PR_FL_IGNORE_KEY) ? 0x06 : 0x00, | |
1622 | old_key, new_key, 0, | |
01f90dd9 | 1623 | (1 << 0) /* APTPL */); |
924d55b0 CH |
1624 | } |
1625 | ||
1626 | static int sd_pr_reserve(struct block_device *bdev, u64 key, enum pr_type type, | |
1627 | u32 flags) | |
1628 | { | |
1629 | if (flags) | |
1630 | return -EOPNOTSUPP; | |
1631 | return sd_pr_command(bdev, 0x01, key, 0, sd_pr_type(type), 0); | |
1632 | } | |
1633 | ||
1634 | static int sd_pr_release(struct block_device *bdev, u64 key, enum pr_type type) | |
1635 | { | |
1636 | return sd_pr_command(bdev, 0x02, key, 0, sd_pr_type(type), 0); | |
1637 | } | |
1638 | ||
1639 | static int sd_pr_preempt(struct block_device *bdev, u64 old_key, u64 new_key, | |
1640 | enum pr_type type, bool abort) | |
1641 | { | |
1642 | return sd_pr_command(bdev, abort ? 0x05 : 0x04, old_key, new_key, | |
1643 | sd_pr_type(type), 0); | |
1644 | } | |
1645 | ||
1646 | static int sd_pr_clear(struct block_device *bdev, u64 key) | |
1647 | { | |
1648 | return sd_pr_command(bdev, 0x03, key, 0, 0, 0); | |
1649 | } | |
1650 | ||
1651 | static const struct pr_ops sd_pr_ops = { | |
1652 | .pr_register = sd_pr_register, | |
1653 | .pr_reserve = sd_pr_reserve, | |
1654 | .pr_release = sd_pr_release, | |
1655 | .pr_preempt = sd_pr_preempt, | |
1656 | .pr_clear = sd_pr_clear, | |
1657 | }; | |
1658 | ||
83d5cde4 | 1659 | static const struct block_device_operations sd_fops = { |
1da177e4 | 1660 | .owner = THIS_MODULE, |
0338e291 AV |
1661 | .open = sd_open, |
1662 | .release = sd_release, | |
8a6cfeb6 | 1663 | .ioctl = sd_ioctl, |
a885c8c4 | 1664 | .getgeo = sd_getgeo, |
1da177e4 | 1665 | #ifdef CONFIG_COMPAT |
0338e291 | 1666 | .compat_ioctl = sd_compat_ioctl, |
1da177e4 | 1667 | #endif |
2bae0093 | 1668 | .check_events = sd_check_events, |
1da177e4 | 1669 | .revalidate_disk = sd_revalidate_disk, |
72ec24bd | 1670 | .unlock_native_capacity = sd_unlock_native_capacity, |
924d55b0 | 1671 | .pr_ops = &sd_pr_ops, |
1da177e4 LT |
1672 | }; |
1673 | ||
18a4d0a2 MP |
1674 | /** |
1675 | * sd_eh_action - error handling callback | |
1676 | * @scmd: sd-issued command that has failed | |
18a4d0a2 MP |
1677 | * @eh_disp: The recovery disposition suggested by the midlayer |
1678 | * | |
2451079b JB |
1679 | * This function is called by the SCSI midlayer upon completion of an |
1680 | * error test command (currently TEST UNIT READY). The result of sending | |
1681 | * the eh command is passed in eh_disp. We're looking for devices that | |
1682 | * fail medium access commands but are OK with non access commands like | |
1683 | * test unit ready (so wrongly see the device as having a successful | |
1684 | * recovery) | |
18a4d0a2 | 1685 | **/ |
2451079b | 1686 | static int sd_eh_action(struct scsi_cmnd *scmd, int eh_disp) |
18a4d0a2 MP |
1687 | { |
1688 | struct scsi_disk *sdkp = scsi_disk(scmd->request->rq_disk); | |
1689 | ||
1690 | if (!scsi_device_online(scmd->device) || | |
2451079b JB |
1691 | !scsi_medium_access_command(scmd) || |
1692 | host_byte(scmd->result) != DID_TIME_OUT || | |
1693 | eh_disp != SUCCESS) | |
18a4d0a2 MP |
1694 | return eh_disp; |
1695 | ||
1696 | /* | |
1697 | * The device has timed out executing a medium access command. | |
1698 | * However, the TEST UNIT READY command sent during error | |
1699 | * handling completed successfully. Either the device is in the | |
1700 | * process of recovering or has it suffered an internal failure | |
1701 | * that prevents access to the storage medium. | |
1702 | */ | |
2451079b | 1703 | sdkp->medium_access_timed_out++; |
18a4d0a2 MP |
1704 | |
1705 | /* | |
1706 | * If the device keeps failing read/write commands but TEST UNIT | |
1707 | * READY always completes successfully we assume that medium | |
1708 | * access is no longer possible and take the device offline. | |
1709 | */ | |
1710 | if (sdkp->medium_access_timed_out >= sdkp->max_medium_access_timeouts) { | |
1711 | scmd_printk(KERN_ERR, scmd, | |
1712 | "Medium access timeout failure. Offlining disk!\n"); | |
1713 | scsi_device_set_state(scmd->device, SDEV_OFFLINE); | |
1714 | ||
1715 | return FAILED; | |
1716 | } | |
1717 | ||
1718 | return eh_disp; | |
1719 | } | |
1720 | ||
af55ff67 MP |
1721 | static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd) |
1722 | { | |
83096ebf TH |
1723 | u64 start_lba = blk_rq_pos(scmd->request); |
1724 | u64 end_lba = blk_rq_pos(scmd->request) + (scsi_bufflen(scmd) / 512); | |
74856fbf | 1725 | u64 factor = scmd->device->sector_size / 512; |
af55ff67 MP |
1726 | u64 bad_lba; |
1727 | int info_valid; | |
a8733c7b JB |
1728 | /* |
1729 | * resid is optional but mostly filled in. When it's unused, | |
1730 | * its value is zero, so we assume the whole buffer transferred | |
1731 | */ | |
1732 | unsigned int transferred = scsi_bufflen(scmd) - scsi_get_resid(scmd); | |
1733 | unsigned int good_bytes; | |
af55ff67 | 1734 | |
33659ebb | 1735 | if (scmd->request->cmd_type != REQ_TYPE_FS) |
af55ff67 MP |
1736 | return 0; |
1737 | ||
1738 | info_valid = scsi_get_sense_info_fld(scmd->sense_buffer, | |
1739 | SCSI_SENSE_BUFFERSIZE, | |
1740 | &bad_lba); | |
1741 | if (!info_valid) | |
1742 | return 0; | |
1743 | ||
1744 | if (scsi_bufflen(scmd) <= scmd->device->sector_size) | |
1745 | return 0; | |
1746 | ||
74856fbf MH |
1747 | /* be careful ... don't want any overflows */ |
1748 | do_div(start_lba, factor); | |
1749 | do_div(end_lba, factor); | |
af55ff67 MP |
1750 | |
1751 | /* The bad lba was reported incorrectly, we have no idea where | |
1752 | * the error is. | |
1753 | */ | |
1754 | if (bad_lba < start_lba || bad_lba >= end_lba) | |
1755 | return 0; | |
1756 | ||
1757 | /* This computation should always be done in terms of | |
1758 | * the resolution of the device's medium. | |
1759 | */ | |
a8733c7b JB |
1760 | good_bytes = (bad_lba - start_lba) * scmd->device->sector_size; |
1761 | return min(good_bytes, transferred); | |
af55ff67 MP |
1762 | } |
1763 | ||
1da177e4 | 1764 | /** |
7b3d9545 | 1765 | * sd_done - bottom half handler: called when the lower level |
1da177e4 LT |
1766 | * driver has completed (successfully or otherwise) a scsi command. |
1767 | * @SCpnt: mid-level's per command structure. | |
1768 | * | |
1769 | * Note: potentially run from within an ISR. Must not block. | |
1770 | **/ | |
7b3d9545 | 1771 | static int sd_done(struct scsi_cmnd *SCpnt) |
1da177e4 LT |
1772 | { |
1773 | int result = SCpnt->result; | |
af55ff67 | 1774 | unsigned int good_bytes = result ? 0 : scsi_bufflen(SCpnt); |
1da177e4 | 1775 | struct scsi_sense_hdr sshdr; |
4e7392ec | 1776 | struct scsi_disk *sdkp = scsi_disk(SCpnt->request->rq_disk); |
26e85fcd | 1777 | struct request *req = SCpnt->request; |
1da177e4 LT |
1778 | int sense_valid = 0; |
1779 | int sense_deferred = 0; | |
c98a0eb0 | 1780 | unsigned char op = SCpnt->cmnd[0]; |
5db44863 | 1781 | unsigned char unmap = SCpnt->cmnd[1] & 8; |
1da177e4 | 1782 | |
c2df40df | 1783 | if (req_op(req) == REQ_OP_DISCARD || req_op(req) == REQ_OP_WRITE_SAME) { |
26e85fcd MP |
1784 | if (!result) { |
1785 | good_bytes = blk_rq_bytes(req); | |
1786 | scsi_set_resid(SCpnt, 0); | |
1787 | } else { | |
1788 | good_bytes = 0; | |
1789 | scsi_set_resid(SCpnt, blk_rq_bytes(req)); | |
1790 | } | |
1791 | } | |
6a32a8ae | 1792 | |
1da177e4 LT |
1793 | if (result) { |
1794 | sense_valid = scsi_command_normalize_sense(SCpnt, &sshdr); | |
1795 | if (sense_valid) | |
1796 | sense_deferred = scsi_sense_is_deferred(&sshdr); | |
1797 | } | |
2a863ba8 DJ |
1798 | sdkp->medium_access_timed_out = 0; |
1799 | ||
03aba2f7 LT |
1800 | if (driver_byte(result) != DRIVER_SENSE && |
1801 | (!sense_valid || sense_deferred)) | |
1802 | goto out; | |
1803 | ||
1804 | switch (sshdr.sense_key) { | |
1805 | case HARDWARE_ERROR: | |
1806 | case MEDIUM_ERROR: | |
af55ff67 | 1807 | good_bytes = sd_completed_bytes(SCpnt); |
03aba2f7 LT |
1808 | break; |
1809 | case RECOVERED_ERROR: | |
af55ff67 MP |
1810 | good_bytes = scsi_bufflen(SCpnt); |
1811 | break; | |
10dab226 JW |
1812 | case NO_SENSE: |
1813 | /* This indicates a false check condition, so ignore it. An | |
1814 | * unknown amount of data was transferred so treat it as an | |
1815 | * error. | |
1816 | */ | |
10dab226 JW |
1817 | SCpnt->result = 0; |
1818 | memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); | |
1819 | break; | |
c98a0eb0 MP |
1820 | case ABORTED_COMMAND: |
1821 | if (sshdr.asc == 0x10) /* DIF: Target detected corruption */ | |
1822 | good_bytes = sd_completed_bytes(SCpnt); | |
1823 | break; | |
1824 | case ILLEGAL_REQUEST: | |
1825 | if (sshdr.asc == 0x10) /* DIX: Host detected corruption */ | |
af55ff67 | 1826 | good_bytes = sd_completed_bytes(SCpnt); |
c98a0eb0 | 1827 | /* INVALID COMMAND OPCODE or INVALID FIELD IN CDB */ |
5db44863 MP |
1828 | if (sshdr.asc == 0x20 || sshdr.asc == 0x24) { |
1829 | switch (op) { | |
1830 | case UNMAP: | |
1831 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
1832 | break; | |
1833 | case WRITE_SAME_16: | |
1834 | case WRITE_SAME: | |
1835 | if (unmap) | |
1836 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
1837 | else { | |
1838 | sdkp->device->no_write_same = 1; | |
1839 | sd_config_write_same(sdkp); | |
1840 | ||
1841 | good_bytes = 0; | |
1842 | req->__data_len = blk_rq_bytes(req); | |
1843 | req->cmd_flags |= REQ_QUIET; | |
1844 | } | |
1845 | } | |
1846 | } | |
03aba2f7 LT |
1847 | break; |
1848 | default: | |
1849 | break; | |
1da177e4 | 1850 | } |
03aba2f7 | 1851 | out: |
ef61329d HR |
1852 | SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO, SCpnt, |
1853 | "sd_done: completed %d of %d bytes\n", | |
1854 | good_bytes, scsi_bufflen(SCpnt))); | |
1855 | ||
af55ff67 MP |
1856 | if (rq_data_dir(SCpnt->request) == READ && scsi_prot_sg_count(SCpnt)) |
1857 | sd_dif_complete(SCpnt, good_bytes); | |
1858 | ||
7b3d9545 | 1859 | return good_bytes; |
1da177e4 LT |
1860 | } |
1861 | ||
1da177e4 LT |
1862 | /* |
1863 | * spinup disk - called only in sd_revalidate_disk() | |
1864 | */ | |
1865 | static void | |
e73aec82 | 1866 | sd_spinup_disk(struct scsi_disk *sdkp) |
ea73a9f2 | 1867 | { |
1da177e4 | 1868 | unsigned char cmd[10]; |
4451e472 | 1869 | unsigned long spintime_expire = 0; |
1da177e4 LT |
1870 | int retries, spintime; |
1871 | unsigned int the_result; | |
1872 | struct scsi_sense_hdr sshdr; | |
1873 | int sense_valid = 0; | |
1874 | ||
1875 | spintime = 0; | |
1876 | ||
1877 | /* Spin up drives, as required. Only do this at boot time */ | |
1878 | /* Spinup needs to be done for module loads too. */ | |
1879 | do { | |
1880 | retries = 0; | |
1881 | ||
1882 | do { | |
1883 | cmd[0] = TEST_UNIT_READY; | |
1884 | memset((void *) &cmd[1], 0, 9); | |
1885 | ||
ea73a9f2 JB |
1886 | the_result = scsi_execute_req(sdkp->device, cmd, |
1887 | DMA_NONE, NULL, 0, | |
1888 | &sshdr, SD_TIMEOUT, | |
f4f4e47e | 1889 | SD_MAX_RETRIES, NULL); |
1da177e4 | 1890 | |
b4d38e38 AS |
1891 | /* |
1892 | * If the drive has indicated to us that it | |
1893 | * doesn't have any media in it, don't bother | |
1894 | * with any more polling. | |
1895 | */ | |
1896 | if (media_not_present(sdkp, &sshdr)) | |
1897 | return; | |
1898 | ||
1da177e4 | 1899 | if (the_result) |
ea73a9f2 | 1900 | sense_valid = scsi_sense_valid(&sshdr); |
1da177e4 LT |
1901 | retries++; |
1902 | } while (retries < 3 && | |
1903 | (!scsi_status_is_good(the_result) || | |
1904 | ((driver_byte(the_result) & DRIVER_SENSE) && | |
1905 | sense_valid && sshdr.sense_key == UNIT_ATTENTION))); | |
1906 | ||
1da177e4 LT |
1907 | if ((driver_byte(the_result) & DRIVER_SENSE) == 0) { |
1908 | /* no sense, TUR either succeeded or failed | |
1909 | * with a status error */ | |
e73aec82 | 1910 | if(!spintime && !scsi_status_is_good(the_result)) { |
ef61329d HR |
1911 | sd_print_result(sdkp, "Test Unit Ready failed", |
1912 | the_result); | |
e73aec82 | 1913 | } |
1da177e4 LT |
1914 | break; |
1915 | } | |
ef61329d | 1916 | |
1da177e4 LT |
1917 | /* |
1918 | * The device does not want the automatic start to be issued. | |
1919 | */ | |
33dd6f92 | 1920 | if (sdkp->device->no_start_on_add) |
1da177e4 | 1921 | break; |
1da177e4 | 1922 | |
33dd6f92 MW |
1923 | if (sense_valid && sshdr.sense_key == NOT_READY) { |
1924 | if (sshdr.asc == 4 && sshdr.ascq == 3) | |
1925 | break; /* manual intervention required */ | |
1926 | if (sshdr.asc == 4 && sshdr.ascq == 0xb) | |
1927 | break; /* standby */ | |
1928 | if (sshdr.asc == 4 && sshdr.ascq == 0xc) | |
1929 | break; /* unavailable */ | |
1930 | /* | |
1931 | * Issue command to spin up drive when not ready | |
1932 | */ | |
1da177e4 | 1933 | if (!spintime) { |
e73aec82 | 1934 | sd_printk(KERN_NOTICE, sdkp, "Spinning up disk..."); |
1da177e4 LT |
1935 | cmd[0] = START_STOP; |
1936 | cmd[1] = 1; /* Return immediately */ | |
1937 | memset((void *) &cmd[2], 0, 8); | |
1938 | cmd[4] = 1; /* Start spin cycle */ | |
d2886ea3 SR |
1939 | if (sdkp->device->start_stop_pwr_cond) |
1940 | cmd[4] |= 1 << 4; | |
ea73a9f2 JB |
1941 | scsi_execute_req(sdkp->device, cmd, DMA_NONE, |
1942 | NULL, 0, &sshdr, | |
f4f4e47e FT |
1943 | SD_TIMEOUT, SD_MAX_RETRIES, |
1944 | NULL); | |
4451e472 AS |
1945 | spintime_expire = jiffies + 100 * HZ; |
1946 | spintime = 1; | |
1da177e4 | 1947 | } |
1da177e4 LT |
1948 | /* Wait 1 second for next try */ |
1949 | msleep(1000); | |
1950 | printk("."); | |
4451e472 AS |
1951 | |
1952 | /* | |
1953 | * Wait for USB flash devices with slow firmware. | |
1954 | * Yes, this sense key/ASC combination shouldn't | |
1955 | * occur here. It's characteristic of these devices. | |
1956 | */ | |
1957 | } else if (sense_valid && | |
1958 | sshdr.sense_key == UNIT_ATTENTION && | |
1959 | sshdr.asc == 0x28) { | |
1960 | if (!spintime) { | |
1961 | spintime_expire = jiffies + 5 * HZ; | |
1962 | spintime = 1; | |
1963 | } | |
1964 | /* Wait 1 second for next try */ | |
1965 | msleep(1000); | |
1da177e4 LT |
1966 | } else { |
1967 | /* we don't understand the sense code, so it's | |
1968 | * probably pointless to loop */ | |
1969 | if(!spintime) { | |
e73aec82 MP |
1970 | sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n"); |
1971 | sd_print_sense_hdr(sdkp, &sshdr); | |
1da177e4 LT |
1972 | } |
1973 | break; | |
1974 | } | |
1975 | ||
4451e472 | 1976 | } while (spintime && time_before_eq(jiffies, spintime_expire)); |
1da177e4 LT |
1977 | |
1978 | if (spintime) { | |
1979 | if (scsi_status_is_good(the_result)) | |
1980 | printk("ready\n"); | |
1981 | else | |
1982 | printk("not responding...\n"); | |
1983 | } | |
1984 | } | |
1985 | ||
e0597d70 MP |
1986 | |
1987 | /* | |
1988 | * Determine whether disk supports Data Integrity Field. | |
1989 | */ | |
fe542396 | 1990 | static int sd_read_protection_type(struct scsi_disk *sdkp, unsigned char *buffer) |
e0597d70 MP |
1991 | { |
1992 | struct scsi_device *sdp = sdkp->device; | |
1993 | u8 type; | |
fe542396 | 1994 | int ret = 0; |
e0597d70 MP |
1995 | |
1996 | if (scsi_device_protection(sdp) == 0 || (buffer[12] & 1) == 0) | |
fe542396 | 1997 | return ret; |
35e1a5d9 MP |
1998 | |
1999 | type = ((buffer[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */ | |
2000 | ||
8475c811 | 2001 | if (type > T10_PI_TYPE3_PROTECTION) |
fe542396 MP |
2002 | ret = -ENODEV; |
2003 | else if (scsi_host_dif_capable(sdp->host, type)) | |
2004 | ret = 1; | |
2005 | ||
2006 | if (sdkp->first_scan || type != sdkp->protection_type) | |
2007 | switch (ret) { | |
2008 | case -ENODEV: | |
2009 | sd_printk(KERN_ERR, sdkp, "formatted with unsupported" \ | |
2010 | " protection type %u. Disabling disk!\n", | |
2011 | type); | |
2012 | break; | |
2013 | case 1: | |
2014 | sd_printk(KERN_NOTICE, sdkp, | |
2015 | "Enabling DIF Type %u protection\n", type); | |
2016 | break; | |
2017 | case 0: | |
2018 | sd_printk(KERN_NOTICE, sdkp, | |
2019 | "Disabling DIF Type %u protection\n", type); | |
2020 | break; | |
2021 | } | |
e0597d70 | 2022 | |
be922f47 MP |
2023 | sdkp->protection_type = type; |
2024 | ||
fe542396 | 2025 | return ret; |
e0597d70 MP |
2026 | } |
2027 | ||
0da205e0 MW |
2028 | static void read_capacity_error(struct scsi_disk *sdkp, struct scsi_device *sdp, |
2029 | struct scsi_sense_hdr *sshdr, int sense_valid, | |
2030 | int the_result) | |
2031 | { | |
0da205e0 MW |
2032 | if (driver_byte(the_result) & DRIVER_SENSE) |
2033 | sd_print_sense_hdr(sdkp, sshdr); | |
2034 | else | |
2035 | sd_printk(KERN_NOTICE, sdkp, "Sense not available.\n"); | |
2036 | ||
2037 | /* | |
2038 | * Set dirty bit for removable devices if not ready - | |
2039 | * sometimes drives will not report this properly. | |
2040 | */ | |
2041 | if (sdp->removable && | |
2042 | sense_valid && sshdr->sense_key == NOT_READY) | |
2bae0093 | 2043 | set_media_not_present(sdkp); |
0da205e0 MW |
2044 | |
2045 | /* | |
2046 | * We used to set media_present to 0 here to indicate no media | |
2047 | * in the drive, but some drives fail read capacity even with | |
2048 | * media present, so we can't do that. | |
2049 | */ | |
2050 | sdkp->capacity = 0; /* unknown mapped to zero - as usual */ | |
2051 | } | |
2052 | ||
2053 | #define RC16_LEN 32 | |
2054 | #if RC16_LEN > SD_BUF_SIZE | |
2055 | #error RC16_LEN must not be more than SD_BUF_SIZE | |
2056 | #endif | |
2057 | ||
3233ac19 JB |
2058 | #define READ_CAPACITY_RETRIES_ON_RESET 10 |
2059 | ||
0da205e0 MW |
2060 | static int read_capacity_16(struct scsi_disk *sdkp, struct scsi_device *sdp, |
2061 | unsigned char *buffer) | |
ea73a9f2 | 2062 | { |
1da177e4 | 2063 | unsigned char cmd[16]; |
1da177e4 LT |
2064 | struct scsi_sense_hdr sshdr; |
2065 | int sense_valid = 0; | |
0da205e0 | 2066 | int the_result; |
3233ac19 | 2067 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
ea09bcc9 | 2068 | unsigned int alignment; |
0da205e0 MW |
2069 | unsigned long long lba; |
2070 | unsigned sector_size; | |
1da177e4 | 2071 | |
5ce524bd HG |
2072 | if (sdp->no_read_capacity_16) |
2073 | return -EINVAL; | |
2074 | ||
1da177e4 | 2075 | do { |
0da205e0 | 2076 | memset(cmd, 0, 16); |
eb846d9f | 2077 | cmd[0] = SERVICE_ACTION_IN_16; |
0da205e0 MW |
2078 | cmd[1] = SAI_READ_CAPACITY_16; |
2079 | cmd[13] = RC16_LEN; | |
2080 | memset(buffer, 0, RC16_LEN); | |
2081 | ||
ea73a9f2 | 2082 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, |
0da205e0 MW |
2083 | buffer, RC16_LEN, &sshdr, |
2084 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
1da177e4 | 2085 | |
ea73a9f2 | 2086 | if (media_not_present(sdkp, &sshdr)) |
0da205e0 | 2087 | return -ENODEV; |
1da177e4 | 2088 | |
2b301307 | 2089 | if (the_result) { |
ea73a9f2 | 2090 | sense_valid = scsi_sense_valid(&sshdr); |
2b301307 MW |
2091 | if (sense_valid && |
2092 | sshdr.sense_key == ILLEGAL_REQUEST && | |
2093 | (sshdr.asc == 0x20 || sshdr.asc == 0x24) && | |
2094 | sshdr.ascq == 0x00) | |
2095 | /* Invalid Command Operation Code or | |
2096 | * Invalid Field in CDB, just retry | |
2097 | * silently with RC10 */ | |
2098 | return -EINVAL; | |
3233ac19 JB |
2099 | if (sense_valid && |
2100 | sshdr.sense_key == UNIT_ATTENTION && | |
2101 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) | |
2102 | /* Device reset might occur several times, | |
2103 | * give it one more chance */ | |
2104 | if (--reset_retries > 0) | |
2105 | continue; | |
2b301307 | 2106 | } |
1da177e4 LT |
2107 | retries--; |
2108 | ||
2109 | } while (the_result && retries); | |
2110 | ||
0da205e0 | 2111 | if (the_result) { |
ef61329d | 2112 | sd_print_result(sdkp, "Read Capacity(16) failed", the_result); |
0da205e0 MW |
2113 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); |
2114 | return -EINVAL; | |
2115 | } | |
e73aec82 | 2116 | |
8f76d151 DH |
2117 | sector_size = get_unaligned_be32(&buffer[8]); |
2118 | lba = get_unaligned_be64(&buffer[0]); | |
0da205e0 | 2119 | |
fe542396 MP |
2120 | if (sd_read_protection_type(sdkp, buffer) < 0) { |
2121 | sdkp->capacity = 0; | |
2122 | return -ENODEV; | |
2123 | } | |
0da205e0 MW |
2124 | |
2125 | if ((sizeof(sdkp->capacity) == 4) && (lba >= 0xffffffffULL)) { | |
2126 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a " | |
2127 | "kernel compiled with support for large block " | |
2128 | "devices.\n"); | |
2129 | sdkp->capacity = 0; | |
2130 | return -EOVERFLOW; | |
2131 | } | |
2132 | ||
ea09bcc9 | 2133 | /* Logical blocks per physical block exponent */ |
526f7c79 | 2134 | sdkp->physical_block_size = (1 << (buffer[13] & 0xf)) * sector_size; |
ea09bcc9 MP |
2135 | |
2136 | /* Lowest aligned logical block */ | |
2137 | alignment = ((buffer[14] & 0x3f) << 8 | buffer[15]) * sector_size; | |
2138 | blk_queue_alignment_offset(sdp->request_queue, alignment); | |
2139 | if (alignment && sdkp->first_scan) | |
2140 | sd_printk(KERN_NOTICE, sdkp, | |
2141 | "physical block alignment offset: %u\n", alignment); | |
2142 | ||
c98a0eb0 MP |
2143 | if (buffer[14] & 0x80) { /* LBPME */ |
2144 | sdkp->lbpme = 1; | |
e339c1a7 | 2145 | |
c98a0eb0 MP |
2146 | if (buffer[14] & 0x40) /* LBPRZ */ |
2147 | sdkp->lbprz = 1; | |
e339c1a7 | 2148 | |
c98a0eb0 | 2149 | sd_config_discard(sdkp, SD_LBP_WS16); |
e339c1a7 MP |
2150 | } |
2151 | ||
0da205e0 MW |
2152 | sdkp->capacity = lba + 1; |
2153 | return sector_size; | |
2154 | } | |
2155 | ||
2156 | static int read_capacity_10(struct scsi_disk *sdkp, struct scsi_device *sdp, | |
2157 | unsigned char *buffer) | |
2158 | { | |
2159 | unsigned char cmd[16]; | |
2160 | struct scsi_sense_hdr sshdr; | |
2161 | int sense_valid = 0; | |
2162 | int the_result; | |
3233ac19 | 2163 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
0da205e0 MW |
2164 | sector_t lba; |
2165 | unsigned sector_size; | |
2166 | ||
2167 | do { | |
2168 | cmd[0] = READ_CAPACITY; | |
2169 | memset(&cmd[1], 0, 9); | |
2170 | memset(buffer, 0, 8); | |
2171 | ||
2172 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, | |
2173 | buffer, 8, &sshdr, | |
2174 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
2175 | ||
2176 | if (media_not_present(sdkp, &sshdr)) | |
2177 | return -ENODEV; | |
2178 | ||
3233ac19 | 2179 | if (the_result) { |
0da205e0 | 2180 | sense_valid = scsi_sense_valid(&sshdr); |
3233ac19 JB |
2181 | if (sense_valid && |
2182 | sshdr.sense_key == UNIT_ATTENTION && | |
2183 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) | |
2184 | /* Device reset might occur several times, | |
2185 | * give it one more chance */ | |
2186 | if (--reset_retries > 0) | |
2187 | continue; | |
2188 | } | |
0da205e0 MW |
2189 | retries--; |
2190 | ||
2191 | } while (the_result && retries); | |
2192 | ||
2193 | if (the_result) { | |
ef61329d | 2194 | sd_print_result(sdkp, "Read Capacity(10) failed", the_result); |
0da205e0 MW |
2195 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); |
2196 | return -EINVAL; | |
2197 | } | |
2198 | ||
8f76d151 DH |
2199 | sector_size = get_unaligned_be32(&buffer[4]); |
2200 | lba = get_unaligned_be32(&buffer[0]); | |
0da205e0 | 2201 | |
5ce524bd HG |
2202 | if (sdp->no_read_capacity_16 && (lba == 0xffffffff)) { |
2203 | /* Some buggy (usb cardreader) devices return an lba of | |
2204 | 0xffffffff when the want to report a size of 0 (with | |
2205 | which they really mean no media is present) */ | |
2206 | sdkp->capacity = 0; | |
5cc10350 | 2207 | sdkp->physical_block_size = sector_size; |
5ce524bd HG |
2208 | return sector_size; |
2209 | } | |
2210 | ||
0da205e0 MW |
2211 | if ((sizeof(sdkp->capacity) == 4) && (lba == 0xffffffff)) { |
2212 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a " | |
2213 | "kernel compiled with support for large block " | |
2214 | "devices.\n"); | |
2215 | sdkp->capacity = 0; | |
2216 | return -EOVERFLOW; | |
2217 | } | |
2218 | ||
2219 | sdkp->capacity = lba + 1; | |
526f7c79 | 2220 | sdkp->physical_block_size = sector_size; |
0da205e0 MW |
2221 | return sector_size; |
2222 | } | |
2223 | ||
2b301307 MW |
2224 | static int sd_try_rc16_first(struct scsi_device *sdp) |
2225 | { | |
f87146bb HR |
2226 | if (sdp->host->max_cmd_len < 16) |
2227 | return 0; | |
6a0bdffa AS |
2228 | if (sdp->try_rc_10_first) |
2229 | return 0; | |
2b301307 MW |
2230 | if (sdp->scsi_level > SCSI_SPC_2) |
2231 | return 1; | |
2232 | if (scsi_device_protection(sdp)) | |
2233 | return 1; | |
2234 | return 0; | |
2235 | } | |
2236 | ||
0da205e0 MW |
2237 | /* |
2238 | * read disk capacity | |
2239 | */ | |
2240 | static void | |
2241 | sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer) | |
2242 | { | |
2243 | int sector_size; | |
2244 | struct scsi_device *sdp = sdkp->device; | |
70a9b873 | 2245 | sector_t old_capacity = sdkp->capacity; |
0da205e0 | 2246 | |
2b301307 | 2247 | if (sd_try_rc16_first(sdp)) { |
0da205e0 MW |
2248 | sector_size = read_capacity_16(sdkp, sdp, buffer); |
2249 | if (sector_size == -EOVERFLOW) | |
1da177e4 | 2250 | goto got_data; |
2b301307 MW |
2251 | if (sector_size == -ENODEV) |
2252 | return; | |
2253 | if (sector_size < 0) | |
2254 | sector_size = read_capacity_10(sdkp, sdp, buffer); | |
0da205e0 MW |
2255 | if (sector_size < 0) |
2256 | return; | |
1da177e4 | 2257 | } else { |
0da205e0 MW |
2258 | sector_size = read_capacity_10(sdkp, sdp, buffer); |
2259 | if (sector_size == -EOVERFLOW) | |
2260 | goto got_data; | |
2261 | if (sector_size < 0) | |
2262 | return; | |
2263 | if ((sizeof(sdkp->capacity) > 4) && | |
2264 | (sdkp->capacity > 0xffffffffULL)) { | |
2265 | int old_sector_size = sector_size; | |
2266 | sd_printk(KERN_NOTICE, sdkp, "Very big device. " | |
2267 | "Trying to use READ CAPACITY(16).\n"); | |
2268 | sector_size = read_capacity_16(sdkp, sdp, buffer); | |
2269 | if (sector_size < 0) { | |
2270 | sd_printk(KERN_NOTICE, sdkp, | |
2271 | "Using 0xffffffff as device size\n"); | |
2272 | sdkp->capacity = 1 + (sector_t) 0xffffffff; | |
2273 | sector_size = old_sector_size; | |
2274 | goto got_data; | |
2275 | } | |
2276 | } | |
2277 | } | |
1da177e4 | 2278 | |
5c211caa AS |
2279 | /* Some devices are known to return the total number of blocks, |
2280 | * not the highest block number. Some devices have versions | |
2281 | * which do this and others which do not. Some devices we might | |
2282 | * suspect of doing this but we don't know for certain. | |
2283 | * | |
2284 | * If we know the reported capacity is wrong, decrement it. If | |
2285 | * we can only guess, then assume the number of blocks is even | |
2286 | * (usually true but not always) and err on the side of lowering | |
2287 | * the capacity. | |
2288 | */ | |
2289 | if (sdp->fix_capacity || | |
2290 | (sdp->guess_capacity && (sdkp->capacity & 0x01))) { | |
2291 | sd_printk(KERN_INFO, sdkp, "Adjusting the sector count " | |
2292 | "from its reported value: %llu\n", | |
2293 | (unsigned long long) sdkp->capacity); | |
1da177e4 | 2294 | --sdkp->capacity; |
61bf54b7 ON |
2295 | } |
2296 | ||
1da177e4 LT |
2297 | got_data: |
2298 | if (sector_size == 0) { | |
2299 | sector_size = 512; | |
e73aec82 MP |
2300 | sd_printk(KERN_NOTICE, sdkp, "Sector size 0 reported, " |
2301 | "assuming 512.\n"); | |
1da177e4 LT |
2302 | } |
2303 | ||
2304 | if (sector_size != 512 && | |
2305 | sector_size != 1024 && | |
2306 | sector_size != 2048 && | |
74856fbf | 2307 | sector_size != 4096) { |
e73aec82 MP |
2308 | sd_printk(KERN_NOTICE, sdkp, "Unsupported sector size %d.\n", |
2309 | sector_size); | |
1da177e4 LT |
2310 | /* |
2311 | * The user might want to re-format the drive with | |
2312 | * a supported sectorsize. Once this happens, it | |
2313 | * would be relatively trivial to set the thing up. | |
2314 | * For this reason, we leave the thing in the table. | |
2315 | */ | |
2316 | sdkp->capacity = 0; | |
2317 | /* | |
2318 | * set a bogus sector size so the normal read/write | |
2319 | * logic in the block layer will eventually refuse any | |
2320 | * request on this device without tripping over power | |
2321 | * of two sector size assumptions | |
2322 | */ | |
2323 | sector_size = 512; | |
2324 | } | |
e1defc4f | 2325 | blk_queue_logical_block_size(sdp->request_queue, sector_size); |
7404ad3b | 2326 | |
1da177e4 | 2327 | { |
7404ad3b | 2328 | char cap_str_2[10], cap_str_10[10]; |
1da177e4 | 2329 | |
b9f28d86 JB |
2330 | string_get_size(sdkp->capacity, sector_size, |
2331 | STRING_UNITS_2, cap_str_2, sizeof(cap_str_2)); | |
2332 | string_get_size(sdkp->capacity, sector_size, | |
2333 | STRING_UNITS_10, cap_str_10, | |
7404ad3b | 2334 | sizeof(cap_str_10)); |
1da177e4 | 2335 | |
ea09bcc9 | 2336 | if (sdkp->first_scan || old_capacity != sdkp->capacity) { |
70a9b873 | 2337 | sd_printk(KERN_NOTICE, sdkp, |
ea09bcc9 | 2338 | "%llu %d-byte logical blocks: (%s/%s)\n", |
70a9b873 MP |
2339 | (unsigned long long)sdkp->capacity, |
2340 | sector_size, cap_str_10, cap_str_2); | |
ea09bcc9 | 2341 | |
526f7c79 | 2342 | if (sdkp->physical_block_size != sector_size) |
ea09bcc9 MP |
2343 | sd_printk(KERN_NOTICE, sdkp, |
2344 | "%u-byte physical blocks\n", | |
526f7c79 | 2345 | sdkp->physical_block_size); |
ea09bcc9 | 2346 | } |
1da177e4 LT |
2347 | } |
2348 | ||
ca369d51 | 2349 | if (sdkp->capacity > 0xffffffff) |
bcdb247c | 2350 | sdp->use_16_for_rw = 1; |
53ad570b | 2351 | |
526f7c79 MP |
2352 | blk_queue_physical_block_size(sdp->request_queue, |
2353 | sdkp->physical_block_size); | |
1da177e4 LT |
2354 | sdkp->device->sector_size = sector_size; |
2355 | } | |
2356 | ||
2357 | /* called with buffer of length 512 */ | |
2358 | static inline int | |
ea73a9f2 JB |
2359 | sd_do_mode_sense(struct scsi_device *sdp, int dbd, int modepage, |
2360 | unsigned char *buffer, int len, struct scsi_mode_data *data, | |
2361 | struct scsi_sense_hdr *sshdr) | |
1da177e4 | 2362 | { |
ea73a9f2 | 2363 | return scsi_mode_sense(sdp, dbd, modepage, buffer, len, |
1cf72699 | 2364 | SD_TIMEOUT, SD_MAX_RETRIES, data, |
ea73a9f2 | 2365 | sshdr); |
1da177e4 LT |
2366 | } |
2367 | ||
2368 | /* | |
2369 | * read write protect setting, if possible - called only in sd_revalidate_disk() | |
48970800 | 2370 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
2371 | */ |
2372 | static void | |
e73aec82 | 2373 | sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer) |
ea73a9f2 | 2374 | { |
1da177e4 | 2375 | int res; |
ea73a9f2 | 2376 | struct scsi_device *sdp = sdkp->device; |
1da177e4 | 2377 | struct scsi_mode_data data; |
70a9b873 | 2378 | int old_wp = sdkp->write_prot; |
1da177e4 LT |
2379 | |
2380 | set_disk_ro(sdkp->disk, 0); | |
ea73a9f2 | 2381 | if (sdp->skip_ms_page_3f) { |
b2bff6ce | 2382 | sd_first_printk(KERN_NOTICE, sdkp, "Assuming Write Enabled\n"); |
1da177e4 LT |
2383 | return; |
2384 | } | |
2385 | ||
ea73a9f2 JB |
2386 | if (sdp->use_192_bytes_for_3f) { |
2387 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 192, &data, NULL); | |
1da177e4 LT |
2388 | } else { |
2389 | /* | |
2390 | * First attempt: ask for all pages (0x3F), but only 4 bytes. | |
2391 | * We have to start carefully: some devices hang if we ask | |
2392 | * for more than is available. | |
2393 | */ | |
ea73a9f2 | 2394 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 4, &data, NULL); |
1da177e4 LT |
2395 | |
2396 | /* | |
2397 | * Second attempt: ask for page 0 When only page 0 is | |
2398 | * implemented, a request for page 3F may return Sense Key | |
2399 | * 5: Illegal Request, Sense Code 24: Invalid field in | |
2400 | * CDB. | |
2401 | */ | |
2402 | if (!scsi_status_is_good(res)) | |
ea73a9f2 | 2403 | res = sd_do_mode_sense(sdp, 0, 0, buffer, 4, &data, NULL); |
1da177e4 LT |
2404 | |
2405 | /* | |
2406 | * Third attempt: ask 255 bytes, as we did earlier. | |
2407 | */ | |
2408 | if (!scsi_status_is_good(res)) | |
ea73a9f2 JB |
2409 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 255, |
2410 | &data, NULL); | |
1da177e4 LT |
2411 | } |
2412 | ||
2413 | if (!scsi_status_is_good(res)) { | |
b2bff6ce | 2414 | sd_first_printk(KERN_WARNING, sdkp, |
e73aec82 | 2415 | "Test WP failed, assume Write Enabled\n"); |
1da177e4 LT |
2416 | } else { |
2417 | sdkp->write_prot = ((data.device_specific & 0x80) != 0); | |
2418 | set_disk_ro(sdkp->disk, sdkp->write_prot); | |
70a9b873 MP |
2419 | if (sdkp->first_scan || old_wp != sdkp->write_prot) { |
2420 | sd_printk(KERN_NOTICE, sdkp, "Write Protect is %s\n", | |
2421 | sdkp->write_prot ? "on" : "off"); | |
2422 | sd_printk(KERN_DEBUG, sdkp, | |
2423 | "Mode Sense: %02x %02x %02x %02x\n", | |
2424 | buffer[0], buffer[1], buffer[2], buffer[3]); | |
2425 | } | |
1da177e4 LT |
2426 | } |
2427 | } | |
2428 | ||
2429 | /* | |
2430 | * sd_read_cache_type - called only from sd_revalidate_disk() | |
48970800 | 2431 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
2432 | */ |
2433 | static void | |
e73aec82 | 2434 | sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer) |
631e8a13 | 2435 | { |
1da177e4 | 2436 | int len = 0, res; |
ea73a9f2 | 2437 | struct scsi_device *sdp = sdkp->device; |
1da177e4 | 2438 | |
631e8a13 AV |
2439 | int dbd; |
2440 | int modepage; | |
0bcaa111 | 2441 | int first_len; |
1da177e4 LT |
2442 | struct scsi_mode_data data; |
2443 | struct scsi_sense_hdr sshdr; | |
70a9b873 MP |
2444 | int old_wce = sdkp->WCE; |
2445 | int old_rcd = sdkp->RCD; | |
2446 | int old_dpofua = sdkp->DPOFUA; | |
1da177e4 | 2447 | |
39c60a09 JB |
2448 | |
2449 | if (sdkp->cache_override) | |
2450 | return; | |
2451 | ||
0bcaa111 LT |
2452 | first_len = 4; |
2453 | if (sdp->skip_ms_page_8) { | |
2454 | if (sdp->type == TYPE_RBC) | |
2455 | goto defaults; | |
2456 | else { | |
2457 | if (sdp->skip_ms_page_3f) | |
2458 | goto defaults; | |
2459 | modepage = 0x3F; | |
2460 | if (sdp->use_192_bytes_for_3f) | |
2461 | first_len = 192; | |
2462 | dbd = 0; | |
2463 | } | |
2464 | } else if (sdp->type == TYPE_RBC) { | |
631e8a13 AV |
2465 | modepage = 6; |
2466 | dbd = 8; | |
2467 | } else { | |
2468 | modepage = 8; | |
2469 | dbd = 0; | |
2470 | } | |
2471 | ||
1da177e4 | 2472 | /* cautiously ask */ |
0bcaa111 LT |
2473 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, first_len, |
2474 | &data, &sshdr); | |
1da177e4 LT |
2475 | |
2476 | if (!scsi_status_is_good(res)) | |
2477 | goto bad_sense; | |
2478 | ||
6d73c851 AV |
2479 | if (!data.header_length) { |
2480 | modepage = 6; | |
0bcaa111 | 2481 | first_len = 0; |
b2bff6ce MP |
2482 | sd_first_printk(KERN_ERR, sdkp, |
2483 | "Missing header in MODE_SENSE response\n"); | |
6d73c851 AV |
2484 | } |
2485 | ||
1da177e4 LT |
2486 | /* that went OK, now ask for the proper length */ |
2487 | len = data.length; | |
2488 | ||
2489 | /* | |
2490 | * We're only interested in the first three bytes, actually. | |
2491 | * But the data cache page is defined for the first 20. | |
2492 | */ | |
2493 | if (len < 3) | |
2494 | goto bad_sense; | |
0bcaa111 | 2495 | else if (len > SD_BUF_SIZE) { |
b2bff6ce | 2496 | sd_first_printk(KERN_NOTICE, sdkp, "Truncating mode parameter " |
0bcaa111 LT |
2497 | "data from %d to %d bytes\n", len, SD_BUF_SIZE); |
2498 | len = SD_BUF_SIZE; | |
2499 | } | |
2500 | if (modepage == 0x3F && sdp->use_192_bytes_for_3f) | |
2501 | len = 192; | |
1da177e4 LT |
2502 | |
2503 | /* Get the data */ | |
0bcaa111 LT |
2504 | if (len > first_len) |
2505 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, len, | |
2506 | &data, &sshdr); | |
1da177e4 LT |
2507 | |
2508 | if (scsi_status_is_good(res)) { | |
631e8a13 | 2509 | int offset = data.header_length + data.block_descriptor_length; |
1da177e4 | 2510 | |
0bcaa111 LT |
2511 | while (offset < len) { |
2512 | u8 page_code = buffer[offset] & 0x3F; | |
2513 | u8 spf = buffer[offset] & 0x40; | |
2514 | ||
2515 | if (page_code == 8 || page_code == 6) { | |
2516 | /* We're interested only in the first 3 bytes. | |
2517 | */ | |
2518 | if (len - offset <= 2) { | |
b2bff6ce MP |
2519 | sd_first_printk(KERN_ERR, sdkp, |
2520 | "Incomplete mode parameter " | |
2521 | "data\n"); | |
0bcaa111 LT |
2522 | goto defaults; |
2523 | } else { | |
2524 | modepage = page_code; | |
2525 | goto Page_found; | |
2526 | } | |
2527 | } else { | |
2528 | /* Go to the next page */ | |
2529 | if (spf && len - offset > 3) | |
2530 | offset += 4 + (buffer[offset+2] << 8) + | |
2531 | buffer[offset+3]; | |
2532 | else if (!spf && len - offset > 1) | |
2533 | offset += 2 + buffer[offset+1]; | |
2534 | else { | |
b2bff6ce MP |
2535 | sd_first_printk(KERN_ERR, sdkp, |
2536 | "Incomplete mode " | |
2537 | "parameter data\n"); | |
0bcaa111 LT |
2538 | goto defaults; |
2539 | } | |
2540 | } | |
48970800 AV |
2541 | } |
2542 | ||
b2bff6ce | 2543 | sd_first_printk(KERN_ERR, sdkp, "No Caching mode page found\n"); |
984f1733 AS |
2544 | goto defaults; |
2545 | ||
0bcaa111 | 2546 | Page_found: |
631e8a13 AV |
2547 | if (modepage == 8) { |
2548 | sdkp->WCE = ((buffer[offset + 2] & 0x04) != 0); | |
2549 | sdkp->RCD = ((buffer[offset + 2] & 0x01) != 0); | |
2550 | } else { | |
2551 | sdkp->WCE = ((buffer[offset + 2] & 0x01) == 0); | |
2552 | sdkp->RCD = 0; | |
2553 | } | |
1da177e4 | 2554 | |
007365ad | 2555 | sdkp->DPOFUA = (data.device_specific & 0x10) != 0; |
b14bf2d0 AS |
2556 | if (sdp->broken_fua) { |
2557 | sd_first_printk(KERN_NOTICE, sdkp, "Disabling FUA\n"); | |
2558 | sdkp->DPOFUA = 0; | |
2559 | } else if (sdkp->DPOFUA && !sdkp->device->use_10_for_rw) { | |
b2bff6ce | 2560 | sd_first_printk(KERN_NOTICE, sdkp, |
e73aec82 | 2561 | "Uses READ/WRITE(6), disabling FUA\n"); |
007365ad TH |
2562 | sdkp->DPOFUA = 0; |
2563 | } | |
2564 | ||
2eefd57b SRT |
2565 | /* No cache flush allowed for write protected devices */ |
2566 | if (sdkp->WCE && sdkp->write_prot) | |
2567 | sdkp->WCE = 0; | |
2568 | ||
70a9b873 MP |
2569 | if (sdkp->first_scan || old_wce != sdkp->WCE || |
2570 | old_rcd != sdkp->RCD || old_dpofua != sdkp->DPOFUA) | |
2571 | sd_printk(KERN_NOTICE, sdkp, | |
2572 | "Write cache: %s, read cache: %s, %s\n", | |
2573 | sdkp->WCE ? "enabled" : "disabled", | |
2574 | sdkp->RCD ? "disabled" : "enabled", | |
2575 | sdkp->DPOFUA ? "supports DPO and FUA" | |
2576 | : "doesn't support DPO or FUA"); | |
1da177e4 LT |
2577 | |
2578 | return; | |
2579 | } | |
2580 | ||
2581 | bad_sense: | |
ea73a9f2 | 2582 | if (scsi_sense_valid(&sshdr) && |
1da177e4 LT |
2583 | sshdr.sense_key == ILLEGAL_REQUEST && |
2584 | sshdr.asc == 0x24 && sshdr.ascq == 0x0) | |
e73aec82 | 2585 | /* Invalid field in CDB */ |
b2bff6ce | 2586 | sd_first_printk(KERN_NOTICE, sdkp, "Cache data unavailable\n"); |
1da177e4 | 2587 | else |
b2bff6ce MP |
2588 | sd_first_printk(KERN_ERR, sdkp, |
2589 | "Asking for cache data failed\n"); | |
1da177e4 LT |
2590 | |
2591 | defaults: | |
b81478d8 | 2592 | if (sdp->wce_default_on) { |
b2bff6ce MP |
2593 | sd_first_printk(KERN_NOTICE, sdkp, |
2594 | "Assuming drive cache: write back\n"); | |
b81478d8 NJ |
2595 | sdkp->WCE = 1; |
2596 | } else { | |
b2bff6ce MP |
2597 | sd_first_printk(KERN_ERR, sdkp, |
2598 | "Assuming drive cache: write through\n"); | |
b81478d8 NJ |
2599 | sdkp->WCE = 0; |
2600 | } | |
1da177e4 | 2601 | sdkp->RCD = 0; |
48970800 | 2602 | sdkp->DPOFUA = 0; |
1da177e4 LT |
2603 | } |
2604 | ||
e0597d70 MP |
2605 | /* |
2606 | * The ATO bit indicates whether the DIF application tag is available | |
2607 | * for use by the operating system. | |
2608 | */ | |
439d77f7 | 2609 | static void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer) |
e0597d70 MP |
2610 | { |
2611 | int res, offset; | |
2612 | struct scsi_device *sdp = sdkp->device; | |
2613 | struct scsi_mode_data data; | |
2614 | struct scsi_sense_hdr sshdr; | |
2615 | ||
2616 | if (sdp->type != TYPE_DISK) | |
2617 | return; | |
2618 | ||
2619 | if (sdkp->protection_type == 0) | |
2620 | return; | |
2621 | ||
2622 | res = scsi_mode_sense(sdp, 1, 0x0a, buffer, 36, SD_TIMEOUT, | |
2623 | SD_MAX_RETRIES, &data, &sshdr); | |
2624 | ||
2625 | if (!scsi_status_is_good(res) || !data.header_length || | |
2626 | data.length < 6) { | |
b2bff6ce | 2627 | sd_first_printk(KERN_WARNING, sdkp, |
e0597d70 MP |
2628 | "getting Control mode page failed, assume no ATO\n"); |
2629 | ||
2630 | if (scsi_sense_valid(&sshdr)) | |
2631 | sd_print_sense_hdr(sdkp, &sshdr); | |
2632 | ||
2633 | return; | |
2634 | } | |
2635 | ||
2636 | offset = data.header_length + data.block_descriptor_length; | |
2637 | ||
2638 | if ((buffer[offset] & 0x3f) != 0x0a) { | |
b2bff6ce | 2639 | sd_first_printk(KERN_ERR, sdkp, "ATO Got wrong page\n"); |
e0597d70 MP |
2640 | return; |
2641 | } | |
2642 | ||
2643 | if ((buffer[offset + 5] & 0x80) == 0) | |
2644 | return; | |
2645 | ||
2646 | sdkp->ATO = 1; | |
2647 | ||
2648 | return; | |
2649 | } | |
2650 | ||
d11b6916 MP |
2651 | /** |
2652 | * sd_read_block_limits - Query disk device for preferred I/O sizes. | |
2653 | * @disk: disk to query | |
2654 | */ | |
2655 | static void sd_read_block_limits(struct scsi_disk *sdkp) | |
2656 | { | |
2657 | unsigned int sector_sz = sdkp->device->sector_size; | |
bb2d3de1 | 2658 | const int vpd_len = 64; |
e3deec09 | 2659 | unsigned char *buffer = kmalloc(vpd_len, GFP_KERNEL); |
d11b6916 | 2660 | |
e3deec09 JB |
2661 | if (!buffer || |
2662 | /* Block Limits VPD */ | |
2663 | scsi_get_vpd_page(sdkp->device, 0xb0, buffer, vpd_len)) | |
2664 | goto out; | |
d11b6916 MP |
2665 | |
2666 | blk_queue_io_min(sdkp->disk->queue, | |
2667 | get_unaligned_be16(&buffer[6]) * sector_sz); | |
ca369d51 MP |
2668 | |
2669 | sdkp->max_xfer_blocks = get_unaligned_be32(&buffer[8]); | |
2670 | sdkp->opt_xfer_blocks = get_unaligned_be32(&buffer[12]); | |
d11b6916 | 2671 | |
c98a0eb0 MP |
2672 | if (buffer[3] == 0x3c) { |
2673 | unsigned int lba_count, desc_count; | |
e339c1a7 | 2674 | |
5db44863 | 2675 | sdkp->max_ws_blocks = (u32)get_unaligned_be64(&buffer[36]); |
e339c1a7 | 2676 | |
c98a0eb0 | 2677 | if (!sdkp->lbpme) |
045d3fe7 | 2678 | goto out; |
045d3fe7 | 2679 | |
c98a0eb0 MP |
2680 | lba_count = get_unaligned_be32(&buffer[20]); |
2681 | desc_count = get_unaligned_be32(&buffer[24]); | |
045d3fe7 | 2682 | |
c98a0eb0 MP |
2683 | if (lba_count && desc_count) |
2684 | sdkp->max_unmap_blocks = lba_count; | |
e339c1a7 | 2685 | |
c98a0eb0 | 2686 | sdkp->unmap_granularity = get_unaligned_be32(&buffer[28]); |
e339c1a7 MP |
2687 | |
2688 | if (buffer[32] & 0x80) | |
c98a0eb0 | 2689 | sdkp->unmap_alignment = |
e339c1a7 | 2690 | get_unaligned_be32(&buffer[32]) & ~(1 << 31); |
c98a0eb0 MP |
2691 | |
2692 | if (!sdkp->lbpvpd) { /* LBP VPD page not provided */ | |
2693 | ||
2694 | if (sdkp->max_unmap_blocks) | |
2695 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
2696 | else | |
2697 | sd_config_discard(sdkp, SD_LBP_WS16); | |
2698 | ||
2699 | } else { /* LBP VPD page tells us what to use */ | |
e461338b MP |
2700 | if (sdkp->lbpu && sdkp->max_unmap_blocks && !sdkp->lbprz) |
2701 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
2702 | else if (sdkp->lbpws) | |
c98a0eb0 MP |
2703 | sd_config_discard(sdkp, SD_LBP_WS16); |
2704 | else if (sdkp->lbpws10) | |
2705 | sd_config_discard(sdkp, SD_LBP_WS10); | |
7985090a MP |
2706 | else if (sdkp->lbpu && sdkp->max_unmap_blocks) |
2707 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
c98a0eb0 MP |
2708 | else |
2709 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
2710 | } | |
e339c1a7 MP |
2711 | } |
2712 | ||
e3deec09 | 2713 | out: |
d11b6916 MP |
2714 | kfree(buffer); |
2715 | } | |
2716 | ||
3821d768 MP |
2717 | /** |
2718 | * sd_read_block_characteristics - Query block dev. characteristics | |
2719 | * @disk: disk to query | |
2720 | */ | |
2721 | static void sd_read_block_characteristics(struct scsi_disk *sdkp) | |
2722 | { | |
e3deec09 | 2723 | unsigned char *buffer; |
3821d768 | 2724 | u16 rot; |
bb2d3de1 | 2725 | const int vpd_len = 64; |
3821d768 | 2726 | |
e3deec09 | 2727 | buffer = kmalloc(vpd_len, GFP_KERNEL); |
3821d768 | 2728 | |
e3deec09 JB |
2729 | if (!buffer || |
2730 | /* Block Device Characteristics VPD */ | |
2731 | scsi_get_vpd_page(sdkp->device, 0xb1, buffer, vpd_len)) | |
2732 | goto out; | |
3821d768 MP |
2733 | |
2734 | rot = get_unaligned_be16(&buffer[4]); | |
2735 | ||
b277da0a | 2736 | if (rot == 1) { |
3821d768 | 2737 | queue_flag_set_unlocked(QUEUE_FLAG_NONROT, sdkp->disk->queue); |
b277da0a MS |
2738 | queue_flag_clear_unlocked(QUEUE_FLAG_ADD_RANDOM, sdkp->disk->queue); |
2739 | } | |
3821d768 | 2740 | |
e3deec09 | 2741 | out: |
3821d768 MP |
2742 | kfree(buffer); |
2743 | } | |
2744 | ||
045d3fe7 | 2745 | /** |
c98a0eb0 | 2746 | * sd_read_block_provisioning - Query provisioning VPD page |
045d3fe7 MP |
2747 | * @disk: disk to query |
2748 | */ | |
c98a0eb0 | 2749 | static void sd_read_block_provisioning(struct scsi_disk *sdkp) |
045d3fe7 MP |
2750 | { |
2751 | unsigned char *buffer; | |
2752 | const int vpd_len = 8; | |
2753 | ||
c98a0eb0 | 2754 | if (sdkp->lbpme == 0) |
045d3fe7 MP |
2755 | return; |
2756 | ||
2757 | buffer = kmalloc(vpd_len, GFP_KERNEL); | |
2758 | ||
2759 | if (!buffer || scsi_get_vpd_page(sdkp->device, 0xb2, buffer, vpd_len)) | |
2760 | goto out; | |
2761 | ||
c98a0eb0 MP |
2762 | sdkp->lbpvpd = 1; |
2763 | sdkp->lbpu = (buffer[5] >> 7) & 1; /* UNMAP */ | |
2764 | sdkp->lbpws = (buffer[5] >> 6) & 1; /* WRITE SAME(16) with UNMAP */ | |
2765 | sdkp->lbpws10 = (buffer[5] >> 5) & 1; /* WRITE SAME(10) with UNMAP */ | |
045d3fe7 MP |
2766 | |
2767 | out: | |
2768 | kfree(buffer); | |
2769 | } | |
2770 | ||
5db44863 MP |
2771 | static void sd_read_write_same(struct scsi_disk *sdkp, unsigned char *buffer) |
2772 | { | |
66c28f97 MP |
2773 | struct scsi_device *sdev = sdkp->device; |
2774 | ||
54b2b50c MP |
2775 | if (sdev->host->no_write_same) { |
2776 | sdev->no_write_same = 1; | |
2777 | ||
2778 | return; | |
2779 | } | |
2780 | ||
66c28f97 | 2781 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, INQUIRY) < 0) { |
af73623f BS |
2782 | /* too large values might cause issues with arcmsr */ |
2783 | int vpd_buf_len = 64; | |
2784 | ||
66c28f97 MP |
2785 | sdev->no_report_opcodes = 1; |
2786 | ||
2787 | /* Disable WRITE SAME if REPORT SUPPORTED OPERATION | |
2788 | * CODES is unsupported and the device has an ATA | |
2789 | * Information VPD page (SAT). | |
2790 | */ | |
af73623f | 2791 | if (!scsi_get_vpd_page(sdev, 0x89, buffer, vpd_buf_len)) |
66c28f97 MP |
2792 | sdev->no_write_same = 1; |
2793 | } | |
2794 | ||
2795 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME_16) == 1) | |
5db44863 | 2796 | sdkp->ws16 = 1; |
66c28f97 MP |
2797 | |
2798 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME) == 1) | |
2799 | sdkp->ws10 = 1; | |
5db44863 MP |
2800 | } |
2801 | ||
1da177e4 LT |
2802 | /** |
2803 | * sd_revalidate_disk - called the first time a new disk is seen, | |
2804 | * performs disk spin up, read_capacity, etc. | |
2805 | * @disk: struct gendisk we care about | |
2806 | **/ | |
2807 | static int sd_revalidate_disk(struct gendisk *disk) | |
2808 | { | |
2809 | struct scsi_disk *sdkp = scsi_disk(disk); | |
2810 | struct scsi_device *sdp = sdkp->device; | |
ca369d51 | 2811 | struct request_queue *q = sdkp->disk->queue; |
1da177e4 | 2812 | unsigned char *buffer; |
ca369d51 | 2813 | unsigned int dev_max, rw_max; |
1da177e4 | 2814 | |
fa0d34be MP |
2815 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, |
2816 | "sd_revalidate_disk\n")); | |
1da177e4 LT |
2817 | |
2818 | /* | |
2819 | * If the device is offline, don't try and read capacity or any | |
2820 | * of the other niceties. | |
2821 | */ | |
2822 | if (!scsi_device_online(sdp)) | |
2823 | goto out; | |
2824 | ||
a6123f14 | 2825 | buffer = kmalloc(SD_BUF_SIZE, GFP_KERNEL); |
1da177e4 | 2826 | if (!buffer) { |
e73aec82 MP |
2827 | sd_printk(KERN_WARNING, sdkp, "sd_revalidate_disk: Memory " |
2828 | "allocation failure.\n"); | |
ea73a9f2 | 2829 | goto out; |
1da177e4 LT |
2830 | } |
2831 | ||
e73aec82 | 2832 | sd_spinup_disk(sdkp); |
1da177e4 LT |
2833 | |
2834 | /* | |
2835 | * Without media there is no reason to ask; moreover, some devices | |
2836 | * react badly if we do. | |
2837 | */ | |
2838 | if (sdkp->media_present) { | |
e73aec82 | 2839 | sd_read_capacity(sdkp, buffer); |
ffd4bc2a | 2840 | |
5ddfe085 | 2841 | if (scsi_device_supports_vpd(sdp)) { |
c98a0eb0 | 2842 | sd_read_block_provisioning(sdkp); |
ffd4bc2a MP |
2843 | sd_read_block_limits(sdkp); |
2844 | sd_read_block_characteristics(sdkp); | |
2845 | } | |
2846 | ||
e73aec82 MP |
2847 | sd_read_write_protect_flag(sdkp, buffer); |
2848 | sd_read_cache_type(sdkp, buffer); | |
e0597d70 | 2849 | sd_read_app_tag_own(sdkp, buffer); |
5db44863 | 2850 | sd_read_write_same(sdkp, buffer); |
1da177e4 | 2851 | } |
461d4e90 | 2852 | |
70a9b873 MP |
2853 | sdkp->first_scan = 0; |
2854 | ||
461d4e90 TH |
2855 | /* |
2856 | * We now have all cache related info, determine how we deal | |
4913efe4 | 2857 | * with flush requests. |
461d4e90 | 2858 | */ |
cb2fb68d | 2859 | sd_set_flush_flag(sdkp); |
461d4e90 | 2860 | |
ca369d51 MP |
2861 | /* Initial block count limit based on CDB TRANSFER LENGTH field size. */ |
2862 | dev_max = sdp->use_16_for_rw ? SD_MAX_XFER_BLOCKS : SD_DEF_XFER_BLOCKS; | |
2863 | ||
2864 | /* Some devices report a maximum block count for READ/WRITE requests. */ | |
2865 | dev_max = min_not_zero(dev_max, sdkp->max_xfer_blocks); | |
2866 | q->limits.max_dev_sectors = logical_to_sectors(sdp, dev_max); | |
2867 | ||
2868 | /* | |
2869 | * Use the device's preferred I/O size for reads and writes | |
9c1d9c20 MP |
2870 | * unless the reported value is unreasonably small, large, or |
2871 | * garbage. | |
ca369d51 | 2872 | */ |
9c1d9c20 MP |
2873 | if (sdkp->opt_xfer_blocks && |
2874 | sdkp->opt_xfer_blocks <= dev_max && | |
2875 | sdkp->opt_xfer_blocks <= SD_DEF_XFER_BLOCKS && | |
6b7e9cde MP |
2876 | logical_to_bytes(sdp, sdkp->opt_xfer_blocks) >= PAGE_SIZE) { |
2877 | q->limits.io_opt = logical_to_bytes(sdp, sdkp->opt_xfer_blocks); | |
2878 | rw_max = logical_to_sectors(sdp, sdkp->opt_xfer_blocks); | |
2879 | } else | |
ca369d51 | 2880 | rw_max = BLK_DEF_MAX_SECTORS; |
3a9794d3 | 2881 | |
ca369d51 MP |
2882 | /* Combine with controller limits */ |
2883 | q->limits.max_sectors = min(rw_max, queue_max_hw_sectors(q)); | |
4f258a46 | 2884 | |
f08bb1e0 | 2885 | set_capacity(disk, logical_to_sectors(sdp, sdkp->capacity)); |
5db44863 | 2886 | sd_config_write_same(sdkp); |
1da177e4 LT |
2887 | kfree(buffer); |
2888 | ||
1da177e4 LT |
2889 | out: |
2890 | return 0; | |
2891 | } | |
2892 | ||
72ec24bd TH |
2893 | /** |
2894 | * sd_unlock_native_capacity - unlock native capacity | |
2895 | * @disk: struct gendisk to set capacity for | |
2896 | * | |
2897 | * Block layer calls this function if it detects that partitions | |
2898 | * on @disk reach beyond the end of the device. If the SCSI host | |
2899 | * implements ->unlock_native_capacity() method, it's invoked to | |
2900 | * give it a chance to adjust the device capacity. | |
2901 | * | |
2902 | * CONTEXT: | |
2903 | * Defined by block layer. Might sleep. | |
2904 | */ | |
2905 | static void sd_unlock_native_capacity(struct gendisk *disk) | |
2906 | { | |
2907 | struct scsi_device *sdev = scsi_disk(disk)->device; | |
2908 | ||
2909 | if (sdev->host->hostt->unlock_native_capacity) | |
2910 | sdev->host->hostt->unlock_native_capacity(sdev); | |
2911 | } | |
2912 | ||
3e1a7ff8 TH |
2913 | /** |
2914 | * sd_format_disk_name - format disk name | |
2915 | * @prefix: name prefix - ie. "sd" for SCSI disks | |
2916 | * @index: index of the disk to format name for | |
2917 | * @buf: output buffer | |
2918 | * @buflen: length of the output buffer | |
2919 | * | |
2920 | * SCSI disk names starts at sda. The 26th device is sdz and the | |
2921 | * 27th is sdaa. The last one for two lettered suffix is sdzz | |
2922 | * which is followed by sdaaa. | |
2923 | * | |
2924 | * This is basically 26 base counting with one extra 'nil' entry | |
3ad2f3fb | 2925 | * at the beginning from the second digit on and can be |
3e1a7ff8 TH |
2926 | * determined using similar method as 26 base conversion with the |
2927 | * index shifted -1 after each digit is computed. | |
2928 | * | |
2929 | * CONTEXT: | |
2930 | * Don't care. | |
2931 | * | |
2932 | * RETURNS: | |
2933 | * 0 on success, -errno on failure. | |
2934 | */ | |
2935 | static int sd_format_disk_name(char *prefix, int index, char *buf, int buflen) | |
2936 | { | |
2937 | const int base = 'z' - 'a' + 1; | |
2938 | char *begin = buf + strlen(prefix); | |
2939 | char *end = buf + buflen; | |
2940 | char *p; | |
2941 | int unit; | |
2942 | ||
2943 | p = end - 1; | |
2944 | *p = '\0'; | |
2945 | unit = base; | |
2946 | do { | |
2947 | if (p == begin) | |
2948 | return -EINVAL; | |
2949 | *--p = 'a' + (index % unit); | |
2950 | index = (index / unit) - 1; | |
2951 | } while (index >= 0); | |
2952 | ||
2953 | memmove(begin, p, end - p); | |
2954 | memcpy(buf, prefix, strlen(prefix)); | |
2955 | ||
2956 | return 0; | |
2957 | } | |
2958 | ||
4ace92fc AV |
2959 | /* |
2960 | * The asynchronous part of sd_probe | |
2961 | */ | |
2962 | static void sd_probe_async(void *data, async_cookie_t cookie) | |
2963 | { | |
2964 | struct scsi_disk *sdkp = data; | |
2965 | struct scsi_device *sdp; | |
2966 | struct gendisk *gd; | |
2967 | u32 index; | |
2968 | struct device *dev; | |
2969 | ||
2970 | sdp = sdkp->device; | |
2971 | gd = sdkp->disk; | |
2972 | index = sdkp->index; | |
2973 | dev = &sdp->sdev_gendev; | |
2974 | ||
1a03ae0f MR |
2975 | gd->major = sd_major((index & 0xf0) >> 4); |
2976 | gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00); | |
2977 | gd->minors = SD_MINORS; | |
2978 | ||
4ace92fc AV |
2979 | gd->fops = &sd_fops; |
2980 | gd->private_data = &sdkp->driver; | |
2981 | gd->queue = sdkp->device->request_queue; | |
2982 | ||
70a9b873 MP |
2983 | /* defaults, until the device tells us otherwise */ |
2984 | sdp->sector_size = 512; | |
2985 | sdkp->capacity = 0; | |
2986 | sdkp->media_present = 1; | |
2987 | sdkp->write_prot = 0; | |
39c60a09 | 2988 | sdkp->cache_override = 0; |
70a9b873 MP |
2989 | sdkp->WCE = 0; |
2990 | sdkp->RCD = 0; | |
2991 | sdkp->ATO = 0; | |
2992 | sdkp->first_scan = 1; | |
18a4d0a2 | 2993 | sdkp->max_medium_access_timeouts = SD_MAX_MEDIUM_TIMEOUTS; |
70a9b873 | 2994 | |
4ace92fc AV |
2995 | sd_revalidate_disk(gd); |
2996 | ||
97fedbbe | 2997 | gd->flags = GENHD_FL_EXT_DEVT; |
2bae0093 | 2998 | if (sdp->removable) { |
4ace92fc | 2999 | gd->flags |= GENHD_FL_REMOVABLE; |
2bae0093 TH |
3000 | gd->events |= DISK_EVENT_MEDIA_CHANGE; |
3001 | } | |
4ace92fc | 3002 | |
10c580e4 | 3003 | blk_pm_runtime_init(sdp->request_queue, dev); |
0d52c756 | 3004 | device_add_disk(dev, gd); |
fe542396 MP |
3005 | if (sdkp->capacity) |
3006 | sd_dif_config_host(sdkp); | |
4ace92fc | 3007 | |
3821d768 MP |
3008 | sd_revalidate_disk(gd); |
3009 | ||
4ace92fc AV |
3010 | sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n", |
3011 | sdp->removable ? "removable " : ""); | |
478a8a05 | 3012 | scsi_autopm_put_device(sdp); |
ea038f63 | 3013 | put_device(&sdkp->dev); |
4ace92fc AV |
3014 | } |
3015 | ||
1da177e4 LT |
3016 | /** |
3017 | * sd_probe - called during driver initialization and whenever a | |
3018 | * new scsi device is attached to the system. It is called once | |
3019 | * for each scsi device (not just disks) present. | |
3020 | * @dev: pointer to device object | |
3021 | * | |
3022 | * Returns 0 if successful (or not interested in this scsi device | |
3023 | * (e.g. scanner)); 1 when there is an error. | |
3024 | * | |
3025 | * Note: this function is invoked from the scsi mid-level. | |
3026 | * This function sets up the mapping between a given | |
3027 | * <host,channel,id,lun> (found in sdp) and new device name | |
3028 | * (e.g. /dev/sda). More precisely it is the block device major | |
3029 | * and minor number that is chosen here. | |
3030 | * | |
2db93ce8 PU |
3031 | * Assume sd_probe is not re-entrant (for time being) |
3032 | * Also think about sd_probe() and sd_remove() running coincidentally. | |
1da177e4 LT |
3033 | **/ |
3034 | static int sd_probe(struct device *dev) | |
3035 | { | |
3036 | struct scsi_device *sdp = to_scsi_device(dev); | |
3037 | struct scsi_disk *sdkp; | |
3038 | struct gendisk *gd; | |
439d77f7 | 3039 | int index; |
1da177e4 LT |
3040 | int error; |
3041 | ||
6fe8c1db | 3042 | scsi_autopm_get_device(sdp); |
1da177e4 | 3043 | error = -ENODEV; |
631e8a13 | 3044 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_MOD && sdp->type != TYPE_RBC) |
1da177e4 LT |
3045 | goto out; |
3046 | ||
9ccfc756 | 3047 | SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO, sdp, |
2db93ce8 | 3048 | "sd_probe\n")); |
1da177e4 LT |
3049 | |
3050 | error = -ENOMEM; | |
24669f75 | 3051 | sdkp = kzalloc(sizeof(*sdkp), GFP_KERNEL); |
1da177e4 LT |
3052 | if (!sdkp) |
3053 | goto out; | |
3054 | ||
689d6fac | 3055 | gd = alloc_disk(SD_MINORS); |
1da177e4 LT |
3056 | if (!gd) |
3057 | goto out_free; | |
3058 | ||
f27bac27 TH |
3059 | do { |
3060 | if (!ida_pre_get(&sd_index_ida, GFP_KERNEL)) | |
3061 | goto out_put; | |
1da177e4 | 3062 | |
4034cc68 | 3063 | spin_lock(&sd_index_lock); |
f27bac27 | 3064 | error = ida_get_new(&sd_index_ida, &index); |
4034cc68 | 3065 | spin_unlock(&sd_index_lock); |
f27bac27 | 3066 | } while (error == -EAGAIN); |
1da177e4 | 3067 | |
21208ae5 DK |
3068 | if (error) { |
3069 | sdev_printk(KERN_WARNING, sdp, "sd_probe: memory exhausted.\n"); | |
1da177e4 | 3070 | goto out_put; |
1a03ae0f MR |
3071 | } |
3072 | ||
3e1a7ff8 | 3073 | error = sd_format_disk_name("sd", index, gd->disk_name, DISK_NAME_LEN); |
21208ae5 DK |
3074 | if (error) { |
3075 | sdev_printk(KERN_WARNING, sdp, "SCSI disk (sd) name length exceeded.\n"); | |
f27bac27 | 3076 | goto out_free_index; |
21208ae5 | 3077 | } |
f27bac27 | 3078 | |
1da177e4 LT |
3079 | sdkp->device = sdp; |
3080 | sdkp->driver = &sd_template; | |
3081 | sdkp->disk = gd; | |
3082 | sdkp->index = index; | |
409f3499 | 3083 | atomic_set(&sdkp->openers, 0); |
9e1a1537 | 3084 | atomic_set(&sdkp->device->ioerr_cnt, 0); |
1da177e4 | 3085 | |
601e7638 JB |
3086 | if (!sdp->request_queue->rq_timeout) { |
3087 | if (sdp->type != TYPE_MOD) | |
3088 | blk_queue_rq_timeout(sdp->request_queue, SD_TIMEOUT); | |
3089 | else | |
3090 | blk_queue_rq_timeout(sdp->request_queue, | |
3091 | SD_MOD_TIMEOUT); | |
3092 | } | |
3093 | ||
3094 | device_initialize(&sdkp->dev); | |
478a8a05 | 3095 | sdkp->dev.parent = dev; |
601e7638 | 3096 | sdkp->dev.class = &sd_disk_class; |
02aa2a37 | 3097 | dev_set_name(&sdkp->dev, "%s", dev_name(dev)); |
601e7638 | 3098 | |
dee0586e DC |
3099 | error = device_add(&sdkp->dev); |
3100 | if (error) | |
601e7638 JB |
3101 | goto out_free_index; |
3102 | ||
478a8a05 AS |
3103 | get_device(dev); |
3104 | dev_set_drvdata(dev, sdkp); | |
601e7638 | 3105 | |
ea038f63 | 3106 | get_device(&sdkp->dev); /* prevent release before async_schedule */ |
a7a20d10 | 3107 | async_schedule_domain(sd_probe_async, sdkp, &scsi_sd_probe_domain); |
1da177e4 LT |
3108 | |
3109 | return 0; | |
3110 | ||
f27bac27 | 3111 | out_free_index: |
4034cc68 | 3112 | spin_lock(&sd_index_lock); |
f27bac27 | 3113 | ida_remove(&sd_index_ida, index); |
4034cc68 | 3114 | spin_unlock(&sd_index_lock); |
6bdaa1f1 | 3115 | out_put: |
1da177e4 | 3116 | put_disk(gd); |
6bdaa1f1 | 3117 | out_free: |
1da177e4 | 3118 | kfree(sdkp); |
6bdaa1f1 | 3119 | out: |
6fe8c1db | 3120 | scsi_autopm_put_device(sdp); |
1da177e4 LT |
3121 | return error; |
3122 | } | |
3123 | ||
3124 | /** | |
3125 | * sd_remove - called whenever a scsi disk (previously recognized by | |
3126 | * sd_probe) is detached from the system. It is called (potentially | |
3127 | * multiple times) during sd module unload. | |
3128 | * @sdp: pointer to mid level scsi device object | |
3129 | * | |
3130 | * Note: this function is invoked from the scsi mid-level. | |
3131 | * This function potentially frees up a device name (e.g. /dev/sdc) | |
3132 | * that could be re-used by a subsequent sd_probe(). | |
3133 | * This function is not called when the built-in sd driver is "exit-ed". | |
3134 | **/ | |
3135 | static int sd_remove(struct device *dev) | |
3136 | { | |
601e7638 | 3137 | struct scsi_disk *sdkp; |
0761df9c | 3138 | dev_t devt; |
1da177e4 | 3139 | |
601e7638 | 3140 | sdkp = dev_get_drvdata(dev); |
0761df9c | 3141 | devt = disk_devt(sdkp->disk); |
478a8a05 AS |
3142 | scsi_autopm_get_device(sdkp->device); |
3143 | ||
3c31b52f | 3144 | async_synchronize_full_domain(&scsi_sd_pm_domain); |
a7a20d10 | 3145 | async_synchronize_full_domain(&scsi_sd_probe_domain); |
ee959b00 | 3146 | device_del(&sdkp->dev); |
1da177e4 LT |
3147 | del_gendisk(sdkp->disk); |
3148 | sd_shutdown(dev); | |
39b7f1e2 | 3149 | |
0761df9c HR |
3150 | blk_register_region(devt, SD_MINORS, NULL, |
3151 | sd_default_probe, NULL, NULL); | |
3152 | ||
0b950672 | 3153 | mutex_lock(&sd_ref_mutex); |
39b7f1e2 | 3154 | dev_set_drvdata(dev, NULL); |
ee959b00 | 3155 | put_device(&sdkp->dev); |
0b950672 | 3156 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
3157 | |
3158 | return 0; | |
3159 | } | |
3160 | ||
3161 | /** | |
3162 | * scsi_disk_release - Called to free the scsi_disk structure | |
ee959b00 | 3163 | * @dev: pointer to embedded class device |
1da177e4 | 3164 | * |
0b950672 | 3165 | * sd_ref_mutex must be held entering this routine. Because it is |
1da177e4 LT |
3166 | * called on last put, you should always use the scsi_disk_get() |
3167 | * scsi_disk_put() helpers which manipulate the semaphore directly | |
ee959b00 | 3168 | * and never do a direct put_device. |
1da177e4 | 3169 | **/ |
ee959b00 | 3170 | static void scsi_disk_release(struct device *dev) |
1da177e4 | 3171 | { |
ee959b00 | 3172 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
1da177e4 LT |
3173 | struct gendisk *disk = sdkp->disk; |
3174 | ||
4034cc68 | 3175 | spin_lock(&sd_index_lock); |
f27bac27 | 3176 | ida_remove(&sd_index_ida, sdkp->index); |
4034cc68 | 3177 | spin_unlock(&sd_index_lock); |
1da177e4 LT |
3178 | |
3179 | disk->private_data = NULL; | |
1da177e4 | 3180 | put_disk(disk); |
39b7f1e2 | 3181 | put_device(&sdkp->device->sdev_gendev); |
1da177e4 LT |
3182 | |
3183 | kfree(sdkp); | |
3184 | } | |
3185 | ||
cc5d2c8c | 3186 | static int sd_start_stop_device(struct scsi_disk *sdkp, int start) |
c3c94c5a TH |
3187 | { |
3188 | unsigned char cmd[6] = { START_STOP }; /* START_VALID */ | |
3189 | struct scsi_sense_hdr sshdr; | |
cc5d2c8c | 3190 | struct scsi_device *sdp = sdkp->device; |
c3c94c5a TH |
3191 | int res; |
3192 | ||
3193 | if (start) | |
3194 | cmd[4] |= 1; /* START */ | |
3195 | ||
d2886ea3 SR |
3196 | if (sdp->start_stop_pwr_cond) |
3197 | cmd[4] |= start ? 1 << 4 : 3 << 4; /* Active or Standby */ | |
3198 | ||
c3c94c5a TH |
3199 | if (!scsi_device_online(sdp)) |
3200 | return -ENODEV; | |
3201 | ||
9b21493c LM |
3202 | res = scsi_execute_req_flags(sdp, cmd, DMA_NONE, NULL, 0, &sshdr, |
3203 | SD_TIMEOUT, SD_MAX_RETRIES, NULL, REQ_PM); | |
c3c94c5a | 3204 | if (res) { |
ef61329d | 3205 | sd_print_result(sdkp, "Start/Stop Unit failed", res); |
c3c94c5a | 3206 | if (driver_byte(res) & DRIVER_SENSE) |
cc5d2c8c | 3207 | sd_print_sense_hdr(sdkp, &sshdr); |
95897910 ON |
3208 | if (scsi_sense_valid(&sshdr) && |
3209 | /* 0x3a is medium not present */ | |
3210 | sshdr.asc == 0x3a) | |
3211 | res = 0; | |
c3c94c5a TH |
3212 | } |
3213 | ||
95897910 ON |
3214 | /* SCSI error codes must not go to the generic layer */ |
3215 | if (res) | |
3216 | return -EIO; | |
3217 | ||
3218 | return 0; | |
c3c94c5a TH |
3219 | } |
3220 | ||
1da177e4 LT |
3221 | /* |
3222 | * Send a SYNCHRONIZE CACHE instruction down to the device through | |
3223 | * the normal SCSI command structure. Wait for the command to | |
3224 | * complete. | |
3225 | */ | |
3226 | static void sd_shutdown(struct device *dev) | |
3227 | { | |
3d9a1f53 | 3228 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
1da177e4 LT |
3229 | |
3230 | if (!sdkp) | |
3231 | return; /* this can happen */ | |
3232 | ||
54f57588 | 3233 | if (pm_runtime_suspended(dev)) |
3d9a1f53 | 3234 | return; |
54f57588 | 3235 | |
95897910 | 3236 | if (sdkp->WCE && sdkp->media_present) { |
e73aec82 MP |
3237 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
3238 | sd_sync_cache(sdkp); | |
39b7f1e2 | 3239 | } |
c3c94c5a | 3240 | |
cc5d2c8c JB |
3241 | if (system_state != SYSTEM_RESTART && sdkp->device->manage_start_stop) { |
3242 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); | |
3243 | sd_start_stop_device(sdkp, 0); | |
c3c94c5a | 3244 | } |
39b7f1e2 | 3245 | } |
1da177e4 | 3246 | |
95897910 | 3247 | static int sd_suspend_common(struct device *dev, bool ignore_stop_errors) |
c3c94c5a | 3248 | { |
3d9a1f53 | 3249 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
09ff92fe | 3250 | int ret = 0; |
c3c94c5a | 3251 | |
13b43891 AS |
3252 | if (!sdkp) /* E.g.: runtime suspend following sd_remove() */ |
3253 | return 0; | |
c3c94c5a | 3254 | |
95897910 | 3255 | if (sdkp->WCE && sdkp->media_present) { |
cc5d2c8c | 3256 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
c3c94c5a | 3257 | ret = sd_sync_cache(sdkp); |
95897910 ON |
3258 | if (ret) { |
3259 | /* ignore OFFLINE device */ | |
3260 | if (ret == -ENODEV) | |
3261 | ret = 0; | |
09ff92fe | 3262 | goto done; |
95897910 | 3263 | } |
c3c94c5a TH |
3264 | } |
3265 | ||
691e3d31 | 3266 | if (sdkp->device->manage_start_stop) { |
cc5d2c8c | 3267 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); |
95897910 | 3268 | /* an error is not worth aborting a system sleep */ |
cc5d2c8c | 3269 | ret = sd_start_stop_device(sdkp, 0); |
95897910 ON |
3270 | if (ignore_stop_errors) |
3271 | ret = 0; | |
c3c94c5a TH |
3272 | } |
3273 | ||
09ff92fe | 3274 | done: |
09ff92fe | 3275 | return ret; |
c3c94c5a TH |
3276 | } |
3277 | ||
95897910 ON |
3278 | static int sd_suspend_system(struct device *dev) |
3279 | { | |
3280 | return sd_suspend_common(dev, true); | |
3281 | } | |
3282 | ||
3283 | static int sd_suspend_runtime(struct device *dev) | |
3284 | { | |
3285 | return sd_suspend_common(dev, false); | |
3286 | } | |
3287 | ||
c3c94c5a TH |
3288 | static int sd_resume(struct device *dev) |
3289 | { | |
3d9a1f53 | 3290 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
c3c94c5a | 3291 | |
13b43891 AS |
3292 | if (!sdkp) /* E.g.: runtime resume at the start of sd_probe() */ |
3293 | return 0; | |
3294 | ||
cc5d2c8c | 3295 | if (!sdkp->device->manage_start_stop) |
3d9a1f53 | 3296 | return 0; |
c3c94c5a | 3297 | |
cc5d2c8c | 3298 | sd_printk(KERN_NOTICE, sdkp, "Starting disk\n"); |
3d9a1f53 | 3299 | return sd_start_stop_device(sdkp, 1); |
c3c94c5a TH |
3300 | } |
3301 | ||
1da177e4 LT |
3302 | /** |
3303 | * init_sd - entry point for this driver (both when built in or when | |
3304 | * a module). | |
3305 | * | |
3306 | * Note: this function registers this driver with the scsi mid-level. | |
3307 | **/ | |
3308 | static int __init init_sd(void) | |
3309 | { | |
5e4009ba | 3310 | int majors = 0, i, err; |
1da177e4 LT |
3311 | |
3312 | SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n")); | |
3313 | ||
0761df9c HR |
3314 | for (i = 0; i < SD_MAJORS; i++) { |
3315 | if (register_blkdev(sd_major(i), "sd") != 0) | |
3316 | continue; | |
3317 | majors++; | |
3318 | blk_register_region(sd_major(i), SD_MINORS, NULL, | |
3319 | sd_default_probe, NULL, NULL); | |
3320 | } | |
1da177e4 LT |
3321 | |
3322 | if (!majors) | |
3323 | return -ENODEV; | |
3324 | ||
5e4009ba JG |
3325 | err = class_register(&sd_disk_class); |
3326 | if (err) | |
3327 | goto err_out; | |
6bdaa1f1 | 3328 | |
4e7392ec MP |
3329 | sd_cdb_cache = kmem_cache_create("sd_ext_cdb", SD_EXT_CDB_SIZE, |
3330 | 0, 0, NULL); | |
3331 | if (!sd_cdb_cache) { | |
3332 | printk(KERN_ERR "sd: can't init extended cdb cache\n"); | |
8d964478 | 3333 | err = -ENOMEM; |
4e7392ec MP |
3334 | goto err_out_class; |
3335 | } | |
3336 | ||
3337 | sd_cdb_pool = mempool_create_slab_pool(SD_MEMPOOL_SIZE, sd_cdb_cache); | |
3338 | if (!sd_cdb_pool) { | |
3339 | printk(KERN_ERR "sd: can't init extended cdb pool\n"); | |
8d964478 | 3340 | err = -ENOMEM; |
4e7392ec MP |
3341 | goto err_out_cache; |
3342 | } | |
3343 | ||
afd5e34b JD |
3344 | err = scsi_register_driver(&sd_template.gendrv); |
3345 | if (err) | |
3346 | goto err_out_driver; | |
3347 | ||
5e4009ba JG |
3348 | return 0; |
3349 | ||
afd5e34b JD |
3350 | err_out_driver: |
3351 | mempool_destroy(sd_cdb_pool); | |
3352 | ||
4e7392ec MP |
3353 | err_out_cache: |
3354 | kmem_cache_destroy(sd_cdb_cache); | |
3355 | ||
5e4009ba JG |
3356 | err_out_class: |
3357 | class_unregister(&sd_disk_class); | |
3358 | err_out: | |
3359 | for (i = 0; i < SD_MAJORS; i++) | |
3360 | unregister_blkdev(sd_major(i), "sd"); | |
3361 | return err; | |
1da177e4 LT |
3362 | } |
3363 | ||
3364 | /** | |
3365 | * exit_sd - exit point for this driver (when it is a module). | |
3366 | * | |
3367 | * Note: this function unregisters this driver from the scsi mid-level. | |
3368 | **/ | |
3369 | static void __exit exit_sd(void) | |
3370 | { | |
3371 | int i; | |
3372 | ||
3373 | SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n")); | |
3374 | ||
afd5e34b | 3375 | scsi_unregister_driver(&sd_template.gendrv); |
4e7392ec MP |
3376 | mempool_destroy(sd_cdb_pool); |
3377 | kmem_cache_destroy(sd_cdb_cache); | |
3378 | ||
5e4009ba JG |
3379 | class_unregister(&sd_disk_class); |
3380 | ||
0761df9c HR |
3381 | for (i = 0; i < SD_MAJORS; i++) { |
3382 | blk_unregister_region(sd_major(i), SD_MINORS); | |
1da177e4 | 3383 | unregister_blkdev(sd_major(i), "sd"); |
0761df9c | 3384 | } |
1da177e4 LT |
3385 | } |
3386 | ||
1da177e4 LT |
3387 | module_init(init_sd); |
3388 | module_exit(exit_sd); | |
e73aec82 MP |
3389 | |
3390 | static void sd_print_sense_hdr(struct scsi_disk *sdkp, | |
3391 | struct scsi_sense_hdr *sshdr) | |
3392 | { | |
21045519 HR |
3393 | scsi_print_sense_hdr(sdkp->device, |
3394 | sdkp->disk ? sdkp->disk->disk_name : NULL, sshdr); | |
e73aec82 MP |
3395 | } |
3396 | ||
ef61329d HR |
3397 | static void sd_print_result(const struct scsi_disk *sdkp, const char *msg, |
3398 | int result) | |
e73aec82 | 3399 | { |
ef61329d HR |
3400 | const char *hb_string = scsi_hostbyte_string(result); |
3401 | const char *db_string = scsi_driverbyte_string(result); | |
3402 | ||
3403 | if (hb_string || db_string) | |
3404 | sd_printk(KERN_INFO, sdkp, | |
3405 | "%s: Result: hostbyte=%s driverbyte=%s\n", msg, | |
3406 | hb_string ? hb_string : "invalid", | |
3407 | db_string ? db_string : "invalid"); | |
3408 | else | |
3409 | sd_printk(KERN_INFO, sdkp, | |
3410 | "%s: Result: hostbyte=0x%02x driverbyte=0x%02x\n", | |
3411 | msg, host_byte(result), driver_byte(result)); | |
e73aec82 MP |
3412 | } |
3413 |