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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> |
7c0f6ba6 | 56 | #include <linux/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); | |
89d94756 | 96 | MODULE_ALIAS_SCSI_DEVICE(TYPE_ZBC); |
f018fa55 | 97 | |
870d6656 | 98 | #if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT) |
f615b48c | 99 | #define SD_MINORS 16 |
870d6656 | 100 | #else |
3e1a7ff8 | 101 | #define SD_MINORS 0 |
870d6656 TH |
102 | #endif |
103 | ||
c98a0eb0 | 104 | static void sd_config_discard(struct scsi_disk *, unsigned int); |
5db44863 | 105 | static void sd_config_write_same(struct scsi_disk *); |
7b3d9545 | 106 | static int sd_revalidate_disk(struct gendisk *); |
72ec24bd | 107 | static void sd_unlock_native_capacity(struct gendisk *disk); |
7b3d9545 LT |
108 | static int sd_probe(struct device *); |
109 | static int sd_remove(struct device *); | |
110 | static void sd_shutdown(struct device *); | |
95897910 ON |
111 | static int sd_suspend_system(struct device *); |
112 | static int sd_suspend_runtime(struct device *); | |
7b3d9545 LT |
113 | static int sd_resume(struct device *); |
114 | static void sd_rescan(struct device *); | |
a1b73fc1 CH |
115 | static int sd_init_command(struct scsi_cmnd *SCpnt); |
116 | static void sd_uninit_command(struct scsi_cmnd *SCpnt); | |
7b3d9545 | 117 | static int sd_done(struct scsi_cmnd *); |
7a38dc0b | 118 | static void sd_eh_reset(struct scsi_cmnd *); |
2451079b | 119 | static int sd_eh_action(struct scsi_cmnd *, int); |
7b3d9545 | 120 | static void sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer); |
ee959b00 | 121 | static void scsi_disk_release(struct device *cdev); |
7b3d9545 | 122 | static void sd_print_sense_hdr(struct scsi_disk *, struct scsi_sense_hdr *); |
ef61329d | 123 | static void sd_print_result(const struct scsi_disk *, const char *, int); |
7b3d9545 | 124 | |
4034cc68 | 125 | static DEFINE_SPINLOCK(sd_index_lock); |
f27bac27 | 126 | static DEFINE_IDA(sd_index_ida); |
1da177e4 LT |
127 | |
128 | /* This semaphore is used to mediate the 0->1 reference get in the | |
129 | * face of object destruction (i.e. we can't allow a get on an | |
130 | * object after last put) */ | |
0b950672 | 131 | static DEFINE_MUTEX(sd_ref_mutex); |
1da177e4 | 132 | |
439d77f7 HS |
133 | static struct kmem_cache *sd_cdb_cache; |
134 | static mempool_t *sd_cdb_pool; | |
4e7392ec | 135 | |
6bdaa1f1 JB |
136 | static const char *sd_cache_types[] = { |
137 | "write through", "none", "write back", | |
138 | "write back, no read (daft)" | |
139 | }; | |
140 | ||
cb2fb68d VC |
141 | static void sd_set_flush_flag(struct scsi_disk *sdkp) |
142 | { | |
eb310e23 | 143 | bool wc = false, fua = false; |
cb2fb68d VC |
144 | |
145 | if (sdkp->WCE) { | |
eb310e23 | 146 | wc = true; |
cb2fb68d | 147 | if (sdkp->DPOFUA) |
eb310e23 | 148 | fua = true; |
cb2fb68d VC |
149 | } |
150 | ||
eb310e23 | 151 | blk_queue_write_cache(sdkp->disk->queue, wc, fua); |
cb2fb68d VC |
152 | } |
153 | ||
ee959b00 | 154 | static ssize_t |
e1ea2351 GKH |
155 | cache_type_store(struct device *dev, struct device_attribute *attr, |
156 | const char *buf, size_t count) | |
6bdaa1f1 JB |
157 | { |
158 | int i, ct = -1, rcd, wce, sp; | |
ee959b00 | 159 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
160 | struct scsi_device *sdp = sdkp->device; |
161 | char buffer[64]; | |
162 | char *buffer_data; | |
163 | struct scsi_mode_data data; | |
164 | struct scsi_sense_hdr sshdr; | |
2ee3e26c | 165 | static const char temp[] = "temporary "; |
6bdaa1f1 JB |
166 | int len; |
167 | ||
89d94756 | 168 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) |
6bdaa1f1 JB |
169 | /* no cache control on RBC devices; theoretically they |
170 | * can do it, but there's probably so many exceptions | |
171 | * it's not worth the risk */ | |
172 | return -EINVAL; | |
173 | ||
39c60a09 JB |
174 | if (strncmp(buf, temp, sizeof(temp) - 1) == 0) { |
175 | buf += sizeof(temp) - 1; | |
176 | sdkp->cache_override = 1; | |
177 | } else { | |
178 | sdkp->cache_override = 0; | |
179 | } | |
180 | ||
6391a113 | 181 | for (i = 0; i < ARRAY_SIZE(sd_cache_types); i++) { |
439d77f7 | 182 | len = strlen(sd_cache_types[i]); |
6bdaa1f1 JB |
183 | if (strncmp(sd_cache_types[i], buf, len) == 0 && |
184 | buf[len] == '\n') { | |
185 | ct = i; | |
186 | break; | |
187 | } | |
188 | } | |
189 | if (ct < 0) | |
190 | return -EINVAL; | |
191 | rcd = ct & 0x01 ? 1 : 0; | |
2eefd57b | 192 | wce = (ct & 0x02) && !sdkp->write_prot ? 1 : 0; |
39c60a09 JB |
193 | |
194 | if (sdkp->cache_override) { | |
195 | sdkp->WCE = wce; | |
196 | sdkp->RCD = rcd; | |
cb2fb68d | 197 | sd_set_flush_flag(sdkp); |
39c60a09 JB |
198 | return count; |
199 | } | |
200 | ||
6bdaa1f1 JB |
201 | if (scsi_mode_sense(sdp, 0x08, 8, buffer, sizeof(buffer), SD_TIMEOUT, |
202 | SD_MAX_RETRIES, &data, NULL)) | |
203 | return -EINVAL; | |
a9312fb8 | 204 | len = min_t(size_t, sizeof(buffer), data.length - data.header_length - |
6bdaa1f1 JB |
205 | data.block_descriptor_length); |
206 | buffer_data = buffer + data.header_length + | |
207 | data.block_descriptor_length; | |
208 | buffer_data[2] &= ~0x05; | |
209 | buffer_data[2] |= wce << 2 | rcd; | |
210 | sp = buffer_data[0] & 0x80 ? 1 : 0; | |
2c5d16d6 | 211 | buffer_data[0] &= ~0x80; |
6bdaa1f1 JB |
212 | |
213 | if (scsi_mode_select(sdp, 1, sp, 8, buffer_data, len, SD_TIMEOUT, | |
214 | SD_MAX_RETRIES, &data, &sshdr)) { | |
215 | if (scsi_sense_valid(&sshdr)) | |
e73aec82 | 216 | sd_print_sense_hdr(sdkp, &sshdr); |
6bdaa1f1 JB |
217 | return -EINVAL; |
218 | } | |
f98a8cae | 219 | revalidate_disk(sdkp->disk); |
6bdaa1f1 JB |
220 | return count; |
221 | } | |
222 | ||
ee959b00 | 223 | static ssize_t |
e1ea2351 GKH |
224 | manage_start_stop_show(struct device *dev, struct device_attribute *attr, |
225 | char *buf) | |
226 | { | |
227 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
228 | struct scsi_device *sdp = sdkp->device; | |
229 | ||
230 | return snprintf(buf, 20, "%u\n", sdp->manage_start_stop); | |
231 | } | |
232 | ||
233 | static ssize_t | |
234 | manage_start_stop_store(struct device *dev, struct device_attribute *attr, | |
235 | const char *buf, size_t count) | |
c3c94c5a | 236 | { |
ee959b00 | 237 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
c3c94c5a TH |
238 | struct scsi_device *sdp = sdkp->device; |
239 | ||
240 | if (!capable(CAP_SYS_ADMIN)) | |
241 | return -EACCES; | |
242 | ||
243 | sdp->manage_start_stop = simple_strtoul(buf, NULL, 10); | |
244 | ||
245 | return count; | |
246 | } | |
e1ea2351 | 247 | static DEVICE_ATTR_RW(manage_start_stop); |
c3c94c5a | 248 | |
ee959b00 | 249 | static ssize_t |
e1ea2351 GKH |
250 | allow_restart_show(struct device *dev, struct device_attribute *attr, char *buf) |
251 | { | |
252 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
253 | ||
254 | return snprintf(buf, 40, "%d\n", sdkp->device->allow_restart); | |
255 | } | |
256 | ||
257 | static ssize_t | |
258 | allow_restart_store(struct device *dev, struct device_attribute *attr, | |
259 | const char *buf, size_t count) | |
a144c5ae | 260 | { |
ee959b00 | 261 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
a144c5ae BK |
262 | struct scsi_device *sdp = sdkp->device; |
263 | ||
264 | if (!capable(CAP_SYS_ADMIN)) | |
265 | return -EACCES; | |
266 | ||
89d94756 | 267 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) |
a144c5ae BK |
268 | return -EINVAL; |
269 | ||
270 | sdp->allow_restart = simple_strtoul(buf, NULL, 10); | |
271 | ||
272 | return count; | |
273 | } | |
e1ea2351 | 274 | static DEVICE_ATTR_RW(allow_restart); |
a144c5ae | 275 | |
ee959b00 | 276 | static ssize_t |
e1ea2351 | 277 | cache_type_show(struct device *dev, struct device_attribute *attr, char *buf) |
6bdaa1f1 | 278 | { |
ee959b00 | 279 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
280 | int ct = sdkp->RCD + 2*sdkp->WCE; |
281 | ||
282 | return snprintf(buf, 40, "%s\n", sd_cache_types[ct]); | |
283 | } | |
e1ea2351 | 284 | static DEVICE_ATTR_RW(cache_type); |
6bdaa1f1 | 285 | |
ee959b00 | 286 | static ssize_t |
e1ea2351 | 287 | FUA_show(struct device *dev, struct device_attribute *attr, char *buf) |
6bdaa1f1 | 288 | { |
ee959b00 | 289 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
290 | |
291 | return snprintf(buf, 20, "%u\n", sdkp->DPOFUA); | |
292 | } | |
e1ea2351 | 293 | static DEVICE_ATTR_RO(FUA); |
6bdaa1f1 | 294 | |
ee959b00 | 295 | static ssize_t |
e1ea2351 GKH |
296 | protection_type_show(struct device *dev, struct device_attribute *attr, |
297 | char *buf) | |
e0597d70 MP |
298 | { |
299 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
300 | ||
301 | return snprintf(buf, 20, "%u\n", sdkp->protection_type); | |
302 | } | |
303 | ||
8172499a | 304 | static ssize_t |
e1ea2351 GKH |
305 | protection_type_store(struct device *dev, struct device_attribute *attr, |
306 | const char *buf, size_t count) | |
8172499a MP |
307 | { |
308 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
309 | unsigned int val; | |
310 | int err; | |
311 | ||
312 | if (!capable(CAP_SYS_ADMIN)) | |
313 | return -EACCES; | |
314 | ||
315 | err = kstrtouint(buf, 10, &val); | |
316 | ||
317 | if (err) | |
318 | return err; | |
319 | ||
8475c811 | 320 | if (val >= 0 && val <= T10_PI_TYPE3_PROTECTION) |
8172499a MP |
321 | sdkp->protection_type = val; |
322 | ||
323 | return count; | |
324 | } | |
e1ea2351 | 325 | static DEVICE_ATTR_RW(protection_type); |
8172499a | 326 | |
518fa8e3 | 327 | static ssize_t |
e1ea2351 GKH |
328 | protection_mode_show(struct device *dev, struct device_attribute *attr, |
329 | char *buf) | |
518fa8e3 MP |
330 | { |
331 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
332 | struct scsi_device *sdp = sdkp->device; | |
333 | unsigned int dif, dix; | |
334 | ||
335 | dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type); | |
336 | dix = scsi_host_dix_capable(sdp->host, sdkp->protection_type); | |
337 | ||
8475c811 | 338 | if (!dix && scsi_host_dix_capable(sdp->host, T10_PI_TYPE0_PROTECTION)) { |
518fa8e3 MP |
339 | dif = 0; |
340 | dix = 1; | |
341 | } | |
342 | ||
343 | if (!dif && !dix) | |
344 | return snprintf(buf, 20, "none\n"); | |
345 | ||
346 | return snprintf(buf, 20, "%s%u\n", dix ? "dix" : "dif", dif); | |
347 | } | |
e1ea2351 | 348 | static DEVICE_ATTR_RO(protection_mode); |
518fa8e3 | 349 | |
e0597d70 | 350 | static ssize_t |
e1ea2351 | 351 | app_tag_own_show(struct device *dev, struct device_attribute *attr, char *buf) |
e0597d70 MP |
352 | { |
353 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
354 | ||
355 | return snprintf(buf, 20, "%u\n", sdkp->ATO); | |
356 | } | |
e1ea2351 | 357 | static DEVICE_ATTR_RO(app_tag_own); |
e0597d70 | 358 | |
e339c1a7 | 359 | static ssize_t |
e1ea2351 GKH |
360 | thin_provisioning_show(struct device *dev, struct device_attribute *attr, |
361 | char *buf) | |
e339c1a7 MP |
362 | { |
363 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
364 | ||
c98a0eb0 MP |
365 | return snprintf(buf, 20, "%u\n", sdkp->lbpme); |
366 | } | |
e1ea2351 | 367 | static DEVICE_ATTR_RO(thin_provisioning); |
c98a0eb0 MP |
368 | |
369 | static const char *lbp_mode[] = { | |
370 | [SD_LBP_FULL] = "full", | |
371 | [SD_LBP_UNMAP] = "unmap", | |
372 | [SD_LBP_WS16] = "writesame_16", | |
373 | [SD_LBP_WS10] = "writesame_10", | |
374 | [SD_LBP_ZERO] = "writesame_zero", | |
375 | [SD_LBP_DISABLE] = "disabled", | |
376 | }; | |
377 | ||
378 | static ssize_t | |
e1ea2351 GKH |
379 | provisioning_mode_show(struct device *dev, struct device_attribute *attr, |
380 | char *buf) | |
c98a0eb0 MP |
381 | { |
382 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
383 | ||
384 | return snprintf(buf, 20, "%s\n", lbp_mode[sdkp->provisioning_mode]); | |
385 | } | |
386 | ||
387 | static ssize_t | |
e1ea2351 GKH |
388 | provisioning_mode_store(struct device *dev, struct device_attribute *attr, |
389 | const char *buf, size_t count) | |
c98a0eb0 MP |
390 | { |
391 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
392 | struct scsi_device *sdp = sdkp->device; | |
393 | ||
394 | if (!capable(CAP_SYS_ADMIN)) | |
395 | return -EACCES; | |
396 | ||
89d94756 HR |
397 | if (sd_is_zoned(sdkp)) { |
398 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
399 | return count; | |
400 | } | |
401 | ||
c98a0eb0 MP |
402 | if (sdp->type != TYPE_DISK) |
403 | return -EINVAL; | |
404 | ||
405 | if (!strncmp(buf, lbp_mode[SD_LBP_UNMAP], 20)) | |
406 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
407 | else if (!strncmp(buf, lbp_mode[SD_LBP_WS16], 20)) | |
408 | sd_config_discard(sdkp, SD_LBP_WS16); | |
409 | else if (!strncmp(buf, lbp_mode[SD_LBP_WS10], 20)) | |
410 | sd_config_discard(sdkp, SD_LBP_WS10); | |
411 | else if (!strncmp(buf, lbp_mode[SD_LBP_ZERO], 20)) | |
412 | sd_config_discard(sdkp, SD_LBP_ZERO); | |
413 | else if (!strncmp(buf, lbp_mode[SD_LBP_DISABLE], 20)) | |
414 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
415 | else | |
416 | return -EINVAL; | |
417 | ||
418 | return count; | |
e339c1a7 | 419 | } |
e1ea2351 | 420 | static DEVICE_ATTR_RW(provisioning_mode); |
e339c1a7 | 421 | |
e6bd9312 MP |
422 | static const char *zeroing_mode[] = { |
423 | [SD_ZERO_WRITE] = "write", | |
424 | [SD_ZERO_WS] = "writesame", | |
425 | [SD_ZERO_WS16_UNMAP] = "writesame_16_unmap", | |
426 | [SD_ZERO_WS10_UNMAP] = "writesame_10_unmap", | |
427 | }; | |
428 | ||
429 | static ssize_t | |
430 | zeroing_mode_show(struct device *dev, struct device_attribute *attr, | |
431 | char *buf) | |
432 | { | |
433 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
434 | ||
435 | return snprintf(buf, 20, "%s\n", zeroing_mode[sdkp->zeroing_mode]); | |
436 | } | |
437 | ||
438 | static ssize_t | |
439 | zeroing_mode_store(struct device *dev, struct device_attribute *attr, | |
440 | const char *buf, size_t count) | |
441 | { | |
442 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
443 | ||
444 | if (!capable(CAP_SYS_ADMIN)) | |
445 | return -EACCES; | |
446 | ||
447 | if (!strncmp(buf, zeroing_mode[SD_ZERO_WRITE], 20)) | |
448 | sdkp->zeroing_mode = SD_ZERO_WRITE; | |
449 | else if (!strncmp(buf, zeroing_mode[SD_ZERO_WS], 20)) | |
450 | sdkp->zeroing_mode = SD_ZERO_WS; | |
451 | else if (!strncmp(buf, zeroing_mode[SD_ZERO_WS16_UNMAP], 20)) | |
452 | sdkp->zeroing_mode = SD_ZERO_WS16_UNMAP; | |
453 | else if (!strncmp(buf, zeroing_mode[SD_ZERO_WS10_UNMAP], 20)) | |
454 | sdkp->zeroing_mode = SD_ZERO_WS10_UNMAP; | |
455 | else | |
456 | return -EINVAL; | |
457 | ||
458 | return count; | |
459 | } | |
460 | static DEVICE_ATTR_RW(zeroing_mode); | |
461 | ||
18a4d0a2 | 462 | static ssize_t |
e1ea2351 GKH |
463 | max_medium_access_timeouts_show(struct device *dev, |
464 | struct device_attribute *attr, char *buf) | |
18a4d0a2 MP |
465 | { |
466 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
467 | ||
468 | return snprintf(buf, 20, "%u\n", sdkp->max_medium_access_timeouts); | |
469 | } | |
470 | ||
471 | static ssize_t | |
e1ea2351 GKH |
472 | max_medium_access_timeouts_store(struct device *dev, |
473 | struct device_attribute *attr, const char *buf, | |
474 | size_t count) | |
18a4d0a2 MP |
475 | { |
476 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
477 | int err; | |
478 | ||
479 | if (!capable(CAP_SYS_ADMIN)) | |
480 | return -EACCES; | |
481 | ||
482 | err = kstrtouint(buf, 10, &sdkp->max_medium_access_timeouts); | |
483 | ||
484 | return err ? err : count; | |
485 | } | |
e1ea2351 | 486 | static DEVICE_ATTR_RW(max_medium_access_timeouts); |
18a4d0a2 | 487 | |
5db44863 | 488 | static ssize_t |
e1ea2351 GKH |
489 | max_write_same_blocks_show(struct device *dev, struct device_attribute *attr, |
490 | char *buf) | |
5db44863 MP |
491 | { |
492 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
493 | ||
494 | return snprintf(buf, 20, "%u\n", sdkp->max_ws_blocks); | |
495 | } | |
496 | ||
497 | static ssize_t | |
e1ea2351 GKH |
498 | max_write_same_blocks_store(struct device *dev, struct device_attribute *attr, |
499 | const char *buf, size_t count) | |
5db44863 MP |
500 | { |
501 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
502 | struct scsi_device *sdp = sdkp->device; | |
503 | unsigned long max; | |
504 | int err; | |
505 | ||
506 | if (!capable(CAP_SYS_ADMIN)) | |
507 | return -EACCES; | |
508 | ||
89d94756 | 509 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) |
5db44863 MP |
510 | return -EINVAL; |
511 | ||
512 | err = kstrtoul(buf, 10, &max); | |
513 | ||
514 | if (err) | |
515 | return err; | |
516 | ||
517 | if (max == 0) | |
518 | sdp->no_write_same = 1; | |
66c28f97 MP |
519 | else if (max <= SD_MAX_WS16_BLOCKS) { |
520 | sdp->no_write_same = 0; | |
5db44863 | 521 | sdkp->max_ws_blocks = max; |
66c28f97 | 522 | } |
5db44863 MP |
523 | |
524 | sd_config_write_same(sdkp); | |
525 | ||
526 | return count; | |
527 | } | |
e1ea2351 GKH |
528 | static DEVICE_ATTR_RW(max_write_same_blocks); |
529 | ||
530 | static struct attribute *sd_disk_attrs[] = { | |
531 | &dev_attr_cache_type.attr, | |
532 | &dev_attr_FUA.attr, | |
533 | &dev_attr_allow_restart.attr, | |
534 | &dev_attr_manage_start_stop.attr, | |
535 | &dev_attr_protection_type.attr, | |
536 | &dev_attr_protection_mode.attr, | |
537 | &dev_attr_app_tag_own.attr, | |
538 | &dev_attr_thin_provisioning.attr, | |
539 | &dev_attr_provisioning_mode.attr, | |
e6bd9312 | 540 | &dev_attr_zeroing_mode.attr, |
e1ea2351 GKH |
541 | &dev_attr_max_write_same_blocks.attr, |
542 | &dev_attr_max_medium_access_timeouts.attr, | |
543 | NULL, | |
6bdaa1f1 | 544 | }; |
e1ea2351 | 545 | ATTRIBUTE_GROUPS(sd_disk); |
6bdaa1f1 JB |
546 | |
547 | static struct class sd_disk_class = { | |
548 | .name = "scsi_disk", | |
549 | .owner = THIS_MODULE, | |
ee959b00 | 550 | .dev_release = scsi_disk_release, |
e1ea2351 | 551 | .dev_groups = sd_disk_groups, |
6bdaa1f1 | 552 | }; |
1da177e4 | 553 | |
691e3d31 | 554 | static const struct dev_pm_ops sd_pm_ops = { |
95897910 | 555 | .suspend = sd_suspend_system, |
691e3d31 | 556 | .resume = sd_resume, |
95897910 | 557 | .poweroff = sd_suspend_system, |
691e3d31 | 558 | .restore = sd_resume, |
95897910 | 559 | .runtime_suspend = sd_suspend_runtime, |
691e3d31 AL |
560 | .runtime_resume = sd_resume, |
561 | }; | |
562 | ||
1da177e4 | 563 | static struct scsi_driver sd_template = { |
1da177e4 LT |
564 | .gendrv = { |
565 | .name = "sd", | |
3af6b352 | 566 | .owner = THIS_MODULE, |
1da177e4 LT |
567 | .probe = sd_probe, |
568 | .remove = sd_remove, | |
569 | .shutdown = sd_shutdown, | |
691e3d31 | 570 | .pm = &sd_pm_ops, |
1da177e4 LT |
571 | }, |
572 | .rescan = sd_rescan, | |
a1b73fc1 CH |
573 | .init_command = sd_init_command, |
574 | .uninit_command = sd_uninit_command, | |
7b3d9545 | 575 | .done = sd_done, |
18a4d0a2 | 576 | .eh_action = sd_eh_action, |
7a38dc0b | 577 | .eh_reset = sd_eh_reset, |
1da177e4 LT |
578 | }; |
579 | ||
0761df9c HR |
580 | /* |
581 | * Dummy kobj_map->probe function. | |
582 | * The default ->probe function will call modprobe, which is | |
583 | * pointless as this module is already loaded. | |
584 | */ | |
585 | static struct kobject *sd_default_probe(dev_t devt, int *partno, void *data) | |
586 | { | |
587 | return NULL; | |
588 | } | |
589 | ||
1da177e4 LT |
590 | /* |
591 | * Device no to disk mapping: | |
592 | * | |
593 | * major disc2 disc p1 | |
594 | * |............|.............|....|....| <- dev_t | |
595 | * 31 20 19 8 7 4 3 0 | |
596 | * | |
597 | * Inside a major, we have 16k disks, however mapped non- | |
598 | * contiguously. The first 16 disks are for major0, the next | |
599 | * ones with major1, ... Disk 256 is for major0 again, disk 272 | |
600 | * for major1, ... | |
601 | * As we stay compatible with our numbering scheme, we can reuse | |
602 | * the well-know SCSI majors 8, 65--71, 136--143. | |
603 | */ | |
604 | static int sd_major(int major_idx) | |
605 | { | |
606 | switch (major_idx) { | |
607 | case 0: | |
608 | return SCSI_DISK0_MAJOR; | |
609 | case 1 ... 7: | |
610 | return SCSI_DISK1_MAJOR + major_idx - 1; | |
611 | case 8 ... 15: | |
612 | return SCSI_DISK8_MAJOR + major_idx - 8; | |
613 | default: | |
614 | BUG(); | |
615 | return 0; /* shut up gcc */ | |
616 | } | |
617 | } | |
618 | ||
3d9a1f53 | 619 | static struct scsi_disk *scsi_disk_get(struct gendisk *disk) |
1da177e4 LT |
620 | { |
621 | struct scsi_disk *sdkp = NULL; | |
622 | ||
3d9a1f53 CH |
623 | mutex_lock(&sd_ref_mutex); |
624 | ||
39b7f1e2 AS |
625 | if (disk->private_data) { |
626 | sdkp = scsi_disk(disk); | |
627 | if (scsi_device_get(sdkp->device) == 0) | |
ee959b00 | 628 | get_device(&sdkp->dev); |
39b7f1e2 AS |
629 | else |
630 | sdkp = NULL; | |
631 | } | |
0b950672 | 632 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
633 | return sdkp; |
634 | } | |
635 | ||
636 | static void scsi_disk_put(struct scsi_disk *sdkp) | |
637 | { | |
638 | struct scsi_device *sdev = sdkp->device; | |
639 | ||
0b950672 | 640 | mutex_lock(&sd_ref_mutex); |
ee959b00 | 641 | put_device(&sdkp->dev); |
1da177e4 | 642 | scsi_device_put(sdev); |
0b950672 | 643 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
644 | } |
645 | ||
c611529e MP |
646 | static unsigned char sd_setup_protect_cmnd(struct scsi_cmnd *scmd, |
647 | unsigned int dix, unsigned int dif) | |
35e1a5d9 | 648 | { |
c611529e MP |
649 | struct bio *bio = scmd->request->bio; |
650 | unsigned int prot_op = sd_prot_op(rq_data_dir(scmd->request), dix, dif); | |
651 | unsigned int protect = 0; | |
652 | ||
653 | if (dix) { /* DIX Type 0, 1, 2, 3 */ | |
654 | if (bio_integrity_flagged(bio, BIP_IP_CHECKSUM)) | |
655 | scmd->prot_flags |= SCSI_PROT_IP_CHECKSUM; | |
656 | ||
657 | if (bio_integrity_flagged(bio, BIP_CTRL_NOCHECK) == false) | |
658 | scmd->prot_flags |= SCSI_PROT_GUARD_CHECK; | |
659 | } | |
660 | ||
8475c811 | 661 | if (dif != T10_PI_TYPE3_PROTECTION) { /* DIX/DIF Type 0, 1, 2 */ |
c611529e MP |
662 | scmd->prot_flags |= SCSI_PROT_REF_INCREMENT; |
663 | ||
664 | if (bio_integrity_flagged(bio, BIP_CTRL_NOCHECK) == false) | |
665 | scmd->prot_flags |= SCSI_PROT_REF_CHECK; | |
666 | } | |
667 | ||
668 | if (dif) { /* DIX/DIF Type 1, 2, 3 */ | |
669 | scmd->prot_flags |= SCSI_PROT_TRANSFER_PI; | |
670 | ||
671 | if (bio_integrity_flagged(bio, BIP_DISK_NOCHECK)) | |
672 | protect = 3 << 5; /* Disable target PI checking */ | |
673 | else | |
674 | protect = 1 << 5; /* Enable target PI checking */ | |
35e1a5d9 MP |
675 | } |
676 | ||
677 | scsi_set_prot_op(scmd, prot_op); | |
678 | scsi_set_prot_type(scmd, dif); | |
c611529e MP |
679 | scmd->prot_flags &= sd_prot_flag_mask(prot_op); |
680 | ||
681 | return protect; | |
35e1a5d9 MP |
682 | } |
683 | ||
c98a0eb0 MP |
684 | static void sd_config_discard(struct scsi_disk *sdkp, unsigned int mode) |
685 | { | |
686 | struct request_queue *q = sdkp->disk->queue; | |
687 | unsigned int logical_block_size = sdkp->device->sector_size; | |
688 | unsigned int max_blocks = 0; | |
689 | ||
bcd069bb MP |
690 | q->limits.discard_alignment = |
691 | sdkp->unmap_alignment * logical_block_size; | |
692 | q->limits.discard_granularity = | |
693 | max(sdkp->physical_block_size, | |
694 | sdkp->unmap_granularity * logical_block_size); | |
89730393 MP |
695 | sdkp->provisioning_mode = mode; |
696 | ||
c98a0eb0 MP |
697 | switch (mode) { |
698 | ||
699 | case SD_LBP_DISABLE: | |
2bb4cd5c | 700 | blk_queue_max_discard_sectors(q, 0); |
c98a0eb0 MP |
701 | queue_flag_clear_unlocked(QUEUE_FLAG_DISCARD, q); |
702 | return; | |
703 | ||
704 | case SD_LBP_UNMAP: | |
5db44863 MP |
705 | max_blocks = min_not_zero(sdkp->max_unmap_blocks, |
706 | (u32)SD_MAX_WS16_BLOCKS); | |
c98a0eb0 MP |
707 | break; |
708 | ||
709 | case SD_LBP_WS16: | |
5db44863 MP |
710 | max_blocks = min_not_zero(sdkp->max_ws_blocks, |
711 | (u32)SD_MAX_WS16_BLOCKS); | |
c98a0eb0 MP |
712 | break; |
713 | ||
714 | case SD_LBP_WS10: | |
5db44863 MP |
715 | max_blocks = min_not_zero(sdkp->max_ws_blocks, |
716 | (u32)SD_MAX_WS10_BLOCKS); | |
c98a0eb0 MP |
717 | break; |
718 | ||
719 | case SD_LBP_ZERO: | |
5db44863 MP |
720 | max_blocks = min_not_zero(sdkp->max_ws_blocks, |
721 | (u32)SD_MAX_WS10_BLOCKS); | |
c98a0eb0 MP |
722 | break; |
723 | } | |
724 | ||
2bb4cd5c | 725 | blk_queue_max_discard_sectors(q, max_blocks * (logical_block_size >> 9)); |
c98a0eb0 | 726 | queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, q); |
c98a0eb0 MP |
727 | } |
728 | ||
81d926e8 | 729 | static int sd_setup_unmap_cmnd(struct scsi_cmnd *cmd) |
e339c1a7 | 730 | { |
6a7b4398 | 731 | struct scsi_device *sdp = cmd->device; |
81d926e8 CH |
732 | struct request *rq = cmd->request; |
733 | u64 sector = blk_rq_pos(rq) >> (ilog2(sdp->sector_size) - 9); | |
734 | u32 nr_sectors = blk_rq_sectors(rq) >> (ilog2(sdp->sector_size) - 9); | |
735 | unsigned int data_len = 24; | |
c98a0eb0 | 736 | char *buf; |
e339c1a7 | 737 | |
81d926e8 CH |
738 | rq->special_vec.bv_page = alloc_page(GFP_ATOMIC | __GFP_ZERO); |
739 | if (!rq->special_vec.bv_page) | |
66ac0280 | 740 | return BLKPREP_DEFER; |
81d926e8 CH |
741 | rq->special_vec.bv_offset = 0; |
742 | rq->special_vec.bv_len = data_len; | |
743 | rq->rq_flags |= RQF_SPECIAL_PAYLOAD; | |
66ac0280 | 744 | |
81d926e8 CH |
745 | cmd->cmd_len = 10; |
746 | cmd->cmnd[0] = UNMAP; | |
747 | cmd->cmnd[8] = 24; | |
e339c1a7 | 748 | |
81d926e8 CH |
749 | buf = page_address(rq->special_vec.bv_page); |
750 | put_unaligned_be16(6 + 16, &buf[0]); | |
751 | put_unaligned_be16(16, &buf[2]); | |
752 | put_unaligned_be64(sector, &buf[8]); | |
753 | put_unaligned_be32(nr_sectors, &buf[16]); | |
e339c1a7 | 754 | |
81d926e8 CH |
755 | cmd->allowed = SD_MAX_RETRIES; |
756 | cmd->transfersize = data_len; | |
757 | rq->timeout = SD_TIMEOUT; | |
758 | scsi_req(rq)->resid_len = data_len; | |
e339c1a7 | 759 | |
81d926e8 CH |
760 | return scsi_init_io(cmd); |
761 | } | |
c98a0eb0 | 762 | |
02d26103 | 763 | static int sd_setup_write_same16_cmnd(struct scsi_cmnd *cmd, bool unmap) |
81d926e8 CH |
764 | { |
765 | struct scsi_device *sdp = cmd->device; | |
766 | struct request *rq = cmd->request; | |
767 | u64 sector = blk_rq_pos(rq) >> (ilog2(sdp->sector_size) - 9); | |
768 | u32 nr_sectors = blk_rq_sectors(rq) >> (ilog2(sdp->sector_size) - 9); | |
769 | u32 data_len = sdp->sector_size; | |
c98a0eb0 | 770 | |
81d926e8 CH |
771 | rq->special_vec.bv_page = alloc_page(GFP_ATOMIC | __GFP_ZERO); |
772 | if (!rq->special_vec.bv_page) | |
773 | return BLKPREP_DEFER; | |
774 | rq->special_vec.bv_offset = 0; | |
775 | rq->special_vec.bv_len = data_len; | |
776 | rq->rq_flags |= RQF_SPECIAL_PAYLOAD; | |
c98a0eb0 | 777 | |
81d926e8 CH |
778 | cmd->cmd_len = 16; |
779 | cmd->cmnd[0] = WRITE_SAME_16; | |
02d26103 | 780 | if (unmap) |
6a7b4398 | 781 | cmd->cmnd[1] = 0x8; /* UNMAP */ |
81d926e8 CH |
782 | put_unaligned_be64(sector, &cmd->cmnd[2]); |
783 | put_unaligned_be32(nr_sectors, &cmd->cmnd[10]); | |
66ac0280 | 784 | |
81d926e8 CH |
785 | cmd->allowed = SD_MAX_RETRIES; |
786 | cmd->transfersize = data_len; | |
02d26103 | 787 | rq->timeout = unmap ? SD_TIMEOUT : SD_WRITE_SAME_TIMEOUT; |
81d926e8 | 788 | scsi_req(rq)->resid_len = data_len; |
c98a0eb0 | 789 | |
81d926e8 CH |
790 | return scsi_init_io(cmd); |
791 | } | |
c98a0eb0 | 792 | |
81d926e8 CH |
793 | static int sd_setup_write_same10_cmnd(struct scsi_cmnd *cmd, bool unmap) |
794 | { | |
795 | struct scsi_device *sdp = cmd->device; | |
796 | struct request *rq = cmd->request; | |
797 | u64 sector = blk_rq_pos(rq) >> (ilog2(sdp->sector_size) - 9); | |
798 | u32 nr_sectors = blk_rq_sectors(rq) >> (ilog2(sdp->sector_size) - 9); | |
799 | u32 data_len = sdp->sector_size; | |
c98a0eb0 | 800 | |
81d926e8 CH |
801 | rq->special_vec.bv_page = alloc_page(GFP_ATOMIC | __GFP_ZERO); |
802 | if (!rq->special_vec.bv_page) | |
803 | return BLKPREP_DEFER; | |
804 | rq->special_vec.bv_offset = 0; | |
805 | rq->special_vec.bv_len = data_len; | |
f9d03f96 | 806 | rq->rq_flags |= RQF_SPECIAL_PAYLOAD; |
e339c1a7 | 807 | |
81d926e8 CH |
808 | cmd->cmd_len = 10; |
809 | cmd->cmnd[0] = WRITE_SAME; | |
810 | if (unmap) | |
811 | cmd->cmnd[1] = 0x8; /* UNMAP */ | |
812 | put_unaligned_be32(sector, &cmd->cmnd[2]); | |
813 | put_unaligned_be16(nr_sectors, &cmd->cmnd[7]); | |
6a7b4398 | 814 | |
e4200f8e | 815 | cmd->allowed = SD_MAX_RETRIES; |
81d926e8 | 816 | cmd->transfersize = data_len; |
02d26103 | 817 | rq->timeout = unmap ? SD_TIMEOUT : SD_WRITE_SAME_TIMEOUT; |
81d926e8 | 818 | scsi_req(rq)->resid_len = data_len; |
6a7b4398 | 819 | |
81d926e8 | 820 | return scsi_init_io(cmd); |
f1126e95 | 821 | } |
f9d03f96 | 822 | |
02d26103 CH |
823 | static int sd_setup_write_zeroes_cmnd(struct scsi_cmnd *cmd) |
824 | { | |
825 | struct request *rq = cmd->request; | |
826 | struct scsi_device *sdp = cmd->device; | |
827 | struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); | |
828 | u64 sector = blk_rq_pos(rq) >> (ilog2(sdp->sector_size) - 9); | |
829 | u32 nr_sectors = blk_rq_sectors(rq) >> (ilog2(sdp->sector_size) - 9); | |
ed44fd7f | 830 | int ret; |
02d26103 | 831 | |
e4b87837 | 832 | if (!(rq->cmd_flags & REQ_NOUNMAP)) { |
e6bd9312 MP |
833 | switch (sdkp->zeroing_mode) { |
834 | case SD_ZERO_WS16_UNMAP: | |
ed44fd7f DLM |
835 | ret = sd_setup_write_same16_cmnd(cmd, true); |
836 | goto out; | |
e6bd9312 | 837 | case SD_ZERO_WS10_UNMAP: |
ed44fd7f DLM |
838 | ret = sd_setup_write_same10_cmnd(cmd, true); |
839 | goto out; | |
e4b87837 CH |
840 | } |
841 | } | |
c98a0eb0 | 842 | |
02d26103 CH |
843 | if (sdp->no_write_same) |
844 | return BLKPREP_INVALID; | |
ed44fd7f | 845 | |
02d26103 | 846 | if (sdkp->ws16 || sector > 0xffffffff || nr_sectors > 0xffff) |
ed44fd7f DLM |
847 | ret = sd_setup_write_same16_cmnd(cmd, false); |
848 | else | |
849 | ret = sd_setup_write_same10_cmnd(cmd, false); | |
850 | ||
851 | out: | |
852 | if (sd_is_zoned(sdkp) && ret == BLKPREP_OK) | |
853 | return sd_zbc_write_lock_zone(cmd); | |
854 | ||
855 | return ret; | |
f1126e95 FT |
856 | } |
857 | ||
5db44863 MP |
858 | static void sd_config_write_same(struct scsi_disk *sdkp) |
859 | { | |
860 | struct request_queue *q = sdkp->disk->queue; | |
861 | unsigned int logical_block_size = sdkp->device->sector_size; | |
5db44863 MP |
862 | |
863 | if (sdkp->device->no_write_same) { | |
864 | sdkp->max_ws_blocks = 0; | |
865 | goto out; | |
866 | } | |
867 | ||
868 | /* Some devices can not handle block counts above 0xffff despite | |
869 | * supporting WRITE SAME(16). Consequently we default to 64k | |
870 | * blocks per I/O unless the device explicitly advertises a | |
871 | * bigger limit. | |
872 | */ | |
66c28f97 MP |
873 | if (sdkp->max_ws_blocks > SD_MAX_WS10_BLOCKS) |
874 | sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks, | |
875 | (u32)SD_MAX_WS16_BLOCKS); | |
876 | else if (sdkp->ws16 || sdkp->ws10 || sdkp->device->no_report_opcodes) | |
877 | sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks, | |
878 | (u32)SD_MAX_WS10_BLOCKS); | |
879 | else { | |
880 | sdkp->device->no_write_same = 1; | |
881 | sdkp->max_ws_blocks = 0; | |
882 | } | |
5db44863 | 883 | |
e6bd9312 MP |
884 | if (sdkp->lbprz && sdkp->lbpws) |
885 | sdkp->zeroing_mode = SD_ZERO_WS16_UNMAP; | |
886 | else if (sdkp->lbprz && sdkp->lbpws10) | |
887 | sdkp->zeroing_mode = SD_ZERO_WS10_UNMAP; | |
888 | else if (sdkp->max_ws_blocks) | |
889 | sdkp->zeroing_mode = SD_ZERO_WS; | |
890 | else | |
891 | sdkp->zeroing_mode = SD_ZERO_WRITE; | |
892 | ||
5db44863 | 893 | out: |
66c28f97 MP |
894 | blk_queue_max_write_same_sectors(q, sdkp->max_ws_blocks * |
895 | (logical_block_size >> 9)); | |
02d26103 CH |
896 | blk_queue_max_write_zeroes_sectors(q, sdkp->max_ws_blocks * |
897 | (logical_block_size >> 9)); | |
5db44863 MP |
898 | } |
899 | ||
900 | /** | |
901 | * sd_setup_write_same_cmnd - write the same data to multiple blocks | |
59b1134c | 902 | * @cmd: command to prepare |
5db44863 | 903 | * |
7529fbb0 DLM |
904 | * Will set up either WRITE SAME(10) or WRITE SAME(16) depending on |
905 | * the preference indicated by the target device. | |
5db44863 | 906 | **/ |
59b1134c | 907 | static int sd_setup_write_same_cmnd(struct scsi_cmnd *cmd) |
5db44863 | 908 | { |
59b1134c CH |
909 | struct request *rq = cmd->request; |
910 | struct scsi_device *sdp = cmd->device; | |
5db44863 MP |
911 | struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); |
912 | struct bio *bio = rq->bio; | |
913 | sector_t sector = blk_rq_pos(rq); | |
914 | unsigned int nr_sectors = blk_rq_sectors(rq); | |
08965c2e | 915 | unsigned int nr_bytes = blk_rq_bytes(rq); |
5db44863 MP |
916 | int ret; |
917 | ||
918 | if (sdkp->device->no_write_same) | |
0fb5b1fb | 919 | return BLKPREP_INVALID; |
5db44863 | 920 | |
a4ad39b1 | 921 | BUG_ON(bio_offset(bio) || bio_iovec(bio).bv_len != sdp->sector_size); |
5db44863 | 922 | |
89d94756 | 923 | if (sd_is_zoned(sdkp)) { |
a90dfdc2 | 924 | ret = sd_zbc_write_lock_zone(cmd); |
89d94756 HR |
925 | if (ret != BLKPREP_OK) |
926 | return ret; | |
927 | } | |
928 | ||
5db44863 MP |
929 | sector >>= ilog2(sdp->sector_size) - 9; |
930 | nr_sectors >>= ilog2(sdp->sector_size) - 9; | |
931 | ||
5db44863 | 932 | rq->timeout = SD_WRITE_SAME_TIMEOUT; |
5db44863 MP |
933 | |
934 | if (sdkp->ws16 || sector > 0xffffffff || nr_sectors > 0xffff) { | |
59b1134c CH |
935 | cmd->cmd_len = 16; |
936 | cmd->cmnd[0] = WRITE_SAME_16; | |
937 | put_unaligned_be64(sector, &cmd->cmnd[2]); | |
938 | put_unaligned_be32(nr_sectors, &cmd->cmnd[10]); | |
5db44863 | 939 | } else { |
59b1134c CH |
940 | cmd->cmd_len = 10; |
941 | cmd->cmnd[0] = WRITE_SAME; | |
942 | put_unaligned_be32(sector, &cmd->cmnd[2]); | |
943 | put_unaligned_be16(nr_sectors, &cmd->cmnd[7]); | |
5db44863 MP |
944 | } |
945 | ||
59b1134c | 946 | cmd->transfersize = sdp->sector_size; |
a25ee548 | 947 | cmd->allowed = SD_MAX_RETRIES; |
08965c2e BVA |
948 | |
949 | /* | |
950 | * For WRITE SAME the data transferred via the DATA OUT buffer is | |
951 | * different from the amount of data actually written to the target. | |
952 | * | |
953 | * We set up __data_len to the amount of data transferred via the | |
954 | * DATA OUT buffer so that blk_rq_map_sg sets up the proper S/G list | |
955 | * to transfer a single sector of data first, but then reset it to | |
956 | * the amount of data to be written right after so that the I/O path | |
957 | * knows how much to actually write. | |
958 | */ | |
959 | rq->__data_len = sdp->sector_size; | |
960 | ret = scsi_init_io(cmd); | |
961 | rq->__data_len = nr_bytes; | |
29f6ca69 DLM |
962 | |
963 | if (sd_is_zoned(sdkp) && ret != BLKPREP_OK) | |
964 | sd_zbc_write_unlock_zone(cmd); | |
965 | ||
08965c2e | 966 | return ret; |
5db44863 MP |
967 | } |
968 | ||
a118c6c1 | 969 | static int sd_setup_flush_cmnd(struct scsi_cmnd *cmd) |
90467c29 | 970 | { |
a118c6c1 CH |
971 | struct request *rq = cmd->request; |
972 | ||
973 | /* flush requests don't perform I/O, zero the S/G table */ | |
974 | memset(&cmd->sdb, 0, sizeof(cmd->sdb)); | |
90467c29 | 975 | |
a118c6c1 CH |
976 | cmd->cmnd[0] = SYNCHRONIZE_CACHE; |
977 | cmd->cmd_len = 10; | |
978 | cmd->transfersize = 0; | |
979 | cmd->allowed = SD_MAX_RETRIES; | |
980 | ||
26b9fd8b | 981 | rq->timeout = rq->q->rq_timeout * SD_FLUSH_TIMEOUT_MULTIPLIER; |
a118c6c1 | 982 | return BLKPREP_OK; |
90467c29 FT |
983 | } |
984 | ||
87949eee | 985 | static int sd_setup_read_write_cmnd(struct scsi_cmnd *SCpnt) |
1da177e4 | 986 | { |
a1b73fc1 CH |
987 | struct request *rq = SCpnt->request; |
988 | struct scsi_device *sdp = SCpnt->device; | |
776b23a0 | 989 | struct gendisk *disk = rq->rq_disk; |
89d94756 | 990 | struct scsi_disk *sdkp = scsi_disk(disk); |
83096ebf | 991 | sector_t block = blk_rq_pos(rq); |
18351070 | 992 | sector_t threshold; |
83096ebf | 993 | unsigned int this_count = blk_rq_sectors(rq); |
c611529e | 994 | unsigned int dif, dix; |
89d94756 | 995 | bool zoned_write = sd_is_zoned(sdkp) && rq_data_dir(rq) == WRITE; |
c611529e | 996 | int ret; |
4e7392ec | 997 | unsigned char protect; |
7f9a6bc4 | 998 | |
89d94756 | 999 | if (zoned_write) { |
a90dfdc2 | 1000 | ret = sd_zbc_write_lock_zone(SCpnt); |
89d94756 HR |
1001 | if (ret != BLKPREP_OK) |
1002 | return ret; | |
1003 | } | |
1004 | ||
3c356bde | 1005 | ret = scsi_init_io(SCpnt); |
7f9a6bc4 JB |
1006 | if (ret != BLKPREP_OK) |
1007 | goto out; | |
1008 | SCpnt = rq->special; | |
1009 | ||
1010 | /* from here on until we're complete, any goto out | |
1011 | * is used for a killable error condition */ | |
1012 | ret = BLKPREP_KILL; | |
1da177e4 | 1013 | |
a1b73fc1 CH |
1014 | SCSI_LOG_HLQUEUE(1, |
1015 | scmd_printk(KERN_INFO, SCpnt, | |
1016 | "%s: block=%llu, count=%d\n", | |
1017 | __func__, (unsigned long long)block, this_count)); | |
1da177e4 LT |
1018 | |
1019 | if (!sdp || !scsi_device_online(sdp) || | |
83096ebf | 1020 | block + blk_rq_sectors(rq) > get_capacity(disk)) { |
fa0d34be | 1021 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
83096ebf TH |
1022 | "Finishing %u sectors\n", |
1023 | blk_rq_sectors(rq))); | |
fa0d34be MP |
1024 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
1025 | "Retry with 0x%p\n", SCpnt)); | |
7f9a6bc4 | 1026 | goto out; |
1da177e4 LT |
1027 | } |
1028 | ||
1029 | if (sdp->changed) { | |
1030 | /* | |
1031 | * quietly refuse to do anything to a changed disc until | |
1032 | * the changed bit has been reset | |
1033 | */ | |
3ff5588d | 1034 | /* printk("SCSI disk has been changed or is not present. Prohibiting further I/O.\n"); */ |
7f9a6bc4 | 1035 | goto out; |
1da177e4 | 1036 | } |
7f9a6bc4 | 1037 | |
a0899d4d | 1038 | /* |
18351070 LT |
1039 | * Some SD card readers can't handle multi-sector accesses which touch |
1040 | * the last one or two hardware sectors. Split accesses as needed. | |
a0899d4d | 1041 | */ |
18351070 LT |
1042 | threshold = get_capacity(disk) - SD_LAST_BUGGY_SECTORS * |
1043 | (sdp->sector_size / 512); | |
1044 | ||
1045 | if (unlikely(sdp->last_sector_bug && block + this_count > threshold)) { | |
1046 | if (block < threshold) { | |
1047 | /* Access up to the threshold but not beyond */ | |
1048 | this_count = threshold - block; | |
1049 | } else { | |
1050 | /* Access only a single hardware sector */ | |
1051 | this_count = sdp->sector_size / 512; | |
1052 | } | |
1053 | } | |
a0899d4d | 1054 | |
fa0d34be MP |
1055 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, "block=%llu\n", |
1056 | (unsigned long long)block)); | |
1da177e4 LT |
1057 | |
1058 | /* | |
1059 | * If we have a 1K hardware sectorsize, prevent access to single | |
1060 | * 512 byte sectors. In theory we could handle this - in fact | |
1061 | * the scsi cdrom driver must be able to handle this because | |
1062 | * we typically use 1K blocksizes, and cdroms typically have | |
1063 | * 2K hardware sectorsizes. Of course, things are simpler | |
1064 | * with the cdrom, since it is read-only. For performance | |
1065 | * reasons, the filesystems should be able to handle this | |
1066 | * and not force the scsi disk driver to use bounce buffers | |
1067 | * for this. | |
1068 | */ | |
1069 | if (sdp->sector_size == 1024) { | |
83096ebf | 1070 | if ((block & 1) || (blk_rq_sectors(rq) & 1)) { |
e73aec82 MP |
1071 | scmd_printk(KERN_ERR, SCpnt, |
1072 | "Bad block number requested\n"); | |
7f9a6bc4 | 1073 | goto out; |
1da177e4 LT |
1074 | } else { |
1075 | block = block >> 1; | |
1076 | this_count = this_count >> 1; | |
1077 | } | |
1078 | } | |
1079 | if (sdp->sector_size == 2048) { | |
83096ebf | 1080 | if ((block & 3) || (blk_rq_sectors(rq) & 3)) { |
e73aec82 MP |
1081 | scmd_printk(KERN_ERR, SCpnt, |
1082 | "Bad block number requested\n"); | |
7f9a6bc4 | 1083 | goto out; |
1da177e4 LT |
1084 | } else { |
1085 | block = block >> 2; | |
1086 | this_count = this_count >> 2; | |
1087 | } | |
1088 | } | |
1089 | if (sdp->sector_size == 4096) { | |
83096ebf | 1090 | if ((block & 7) || (blk_rq_sectors(rq) & 7)) { |
e73aec82 MP |
1091 | scmd_printk(KERN_ERR, SCpnt, |
1092 | "Bad block number requested\n"); | |
7f9a6bc4 | 1093 | goto out; |
1da177e4 LT |
1094 | } else { |
1095 | block = block >> 3; | |
1096 | this_count = this_count >> 3; | |
1097 | } | |
1098 | } | |
1099 | if (rq_data_dir(rq) == WRITE) { | |
1da177e4 | 1100 | SCpnt->cmnd[0] = WRITE_6; |
af55ff67 | 1101 | |
8c579ab6 | 1102 | if (blk_integrity_rq(rq)) |
c611529e | 1103 | sd_dif_prepare(SCpnt); |
af55ff67 | 1104 | |
1da177e4 LT |
1105 | } else if (rq_data_dir(rq) == READ) { |
1106 | SCpnt->cmnd[0] = READ_6; | |
1da177e4 | 1107 | } else { |
ef295ecf | 1108 | scmd_printk(KERN_ERR, SCpnt, "Unknown command %d\n", req_op(rq)); |
7f9a6bc4 | 1109 | goto out; |
1da177e4 LT |
1110 | } |
1111 | ||
fa0d34be | 1112 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
83096ebf | 1113 | "%s %d/%u 512 byte blocks.\n", |
fa0d34be MP |
1114 | (rq_data_dir(rq) == WRITE) ? |
1115 | "writing" : "reading", this_count, | |
83096ebf | 1116 | blk_rq_sectors(rq))); |
1da177e4 | 1117 | |
c611529e MP |
1118 | dix = scsi_prot_sg_count(SCpnt); |
1119 | dif = scsi_host_dif_capable(SCpnt->device->host, sdkp->protection_type); | |
1120 | ||
1121 | if (dif || dix) | |
1122 | protect = sd_setup_protect_cmnd(SCpnt, dix, dif); | |
af55ff67 | 1123 | else |
4e7392ec MP |
1124 | protect = 0; |
1125 | ||
8475c811 | 1126 | if (protect && sdkp->protection_type == T10_PI_TYPE2_PROTECTION) { |
4e7392ec MP |
1127 | SCpnt->cmnd = mempool_alloc(sd_cdb_pool, GFP_ATOMIC); |
1128 | ||
1129 | if (unlikely(SCpnt->cmnd == NULL)) { | |
1130 | ret = BLKPREP_DEFER; | |
1131 | goto out; | |
1132 | } | |
af55ff67 | 1133 | |
4e7392ec MP |
1134 | SCpnt->cmd_len = SD_EXT_CDB_SIZE; |
1135 | memset(SCpnt->cmnd, 0, SCpnt->cmd_len); | |
1136 | SCpnt->cmnd[0] = VARIABLE_LENGTH_CMD; | |
1137 | SCpnt->cmnd[7] = 0x18; | |
1138 | SCpnt->cmnd[9] = (rq_data_dir(rq) == READ) ? READ_32 : WRITE_32; | |
33659ebb | 1139 | SCpnt->cmnd[10] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
4e7392ec MP |
1140 | |
1141 | /* LBA */ | |
1142 | SCpnt->cmnd[12] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0; | |
1143 | SCpnt->cmnd[13] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0; | |
1144 | SCpnt->cmnd[14] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0; | |
1145 | SCpnt->cmnd[15] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0; | |
1146 | SCpnt->cmnd[16] = (unsigned char) (block >> 24) & 0xff; | |
1147 | SCpnt->cmnd[17] = (unsigned char) (block >> 16) & 0xff; | |
1148 | SCpnt->cmnd[18] = (unsigned char) (block >> 8) & 0xff; | |
1149 | SCpnt->cmnd[19] = (unsigned char) block & 0xff; | |
1150 | ||
1151 | /* Expected Indirect LBA */ | |
1152 | SCpnt->cmnd[20] = (unsigned char) (block >> 24) & 0xff; | |
1153 | SCpnt->cmnd[21] = (unsigned char) (block >> 16) & 0xff; | |
1154 | SCpnt->cmnd[22] = (unsigned char) (block >> 8) & 0xff; | |
1155 | SCpnt->cmnd[23] = (unsigned char) block & 0xff; | |
1156 | ||
1157 | /* Transfer length */ | |
1158 | SCpnt->cmnd[28] = (unsigned char) (this_count >> 24) & 0xff; | |
1159 | SCpnt->cmnd[29] = (unsigned char) (this_count >> 16) & 0xff; | |
1160 | SCpnt->cmnd[30] = (unsigned char) (this_count >> 8) & 0xff; | |
1161 | SCpnt->cmnd[31] = (unsigned char) this_count & 0xff; | |
e430cbc8 | 1162 | } else if (sdp->use_16_for_rw || (this_count > 0xffff)) { |
1da177e4 | 1163 | SCpnt->cmnd[0] += READ_16 - READ_6; |
33659ebb | 1164 | SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
1da177e4 LT |
1165 | SCpnt->cmnd[2] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0; |
1166 | SCpnt->cmnd[3] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0; | |
1167 | SCpnt->cmnd[4] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0; | |
1168 | SCpnt->cmnd[5] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0; | |
1169 | SCpnt->cmnd[6] = (unsigned char) (block >> 24) & 0xff; | |
1170 | SCpnt->cmnd[7] = (unsigned char) (block >> 16) & 0xff; | |
1171 | SCpnt->cmnd[8] = (unsigned char) (block >> 8) & 0xff; | |
1172 | SCpnt->cmnd[9] = (unsigned char) block & 0xff; | |
1173 | SCpnt->cmnd[10] = (unsigned char) (this_count >> 24) & 0xff; | |
1174 | SCpnt->cmnd[11] = (unsigned char) (this_count >> 16) & 0xff; | |
1175 | SCpnt->cmnd[12] = (unsigned char) (this_count >> 8) & 0xff; | |
1176 | SCpnt->cmnd[13] = (unsigned char) this_count & 0xff; | |
1177 | SCpnt->cmnd[14] = SCpnt->cmnd[15] = 0; | |
1178 | } else if ((this_count > 0xff) || (block > 0x1fffff) || | |
af55ff67 | 1179 | scsi_device_protection(SCpnt->device) || |
1da177e4 | 1180 | SCpnt->device->use_10_for_rw) { |
1da177e4 | 1181 | SCpnt->cmnd[0] += READ_10 - READ_6; |
33659ebb | 1182 | SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
1da177e4 LT |
1183 | SCpnt->cmnd[2] = (unsigned char) (block >> 24) & 0xff; |
1184 | SCpnt->cmnd[3] = (unsigned char) (block >> 16) & 0xff; | |
1185 | SCpnt->cmnd[4] = (unsigned char) (block >> 8) & 0xff; | |
1186 | SCpnt->cmnd[5] = (unsigned char) block & 0xff; | |
1187 | SCpnt->cmnd[6] = SCpnt->cmnd[9] = 0; | |
1188 | SCpnt->cmnd[7] = (unsigned char) (this_count >> 8) & 0xff; | |
1189 | SCpnt->cmnd[8] = (unsigned char) this_count & 0xff; | |
1190 | } else { | |
33659ebb | 1191 | if (unlikely(rq->cmd_flags & REQ_FUA)) { |
007365ad TH |
1192 | /* |
1193 | * This happens only if this drive failed | |
1194 | * 10byte rw command with ILLEGAL_REQUEST | |
1195 | * during operation and thus turned off | |
1196 | * use_10_for_rw. | |
1197 | */ | |
e73aec82 MP |
1198 | scmd_printk(KERN_ERR, SCpnt, |
1199 | "FUA write on READ/WRITE(6) drive\n"); | |
7f9a6bc4 | 1200 | goto out; |
007365ad TH |
1201 | } |
1202 | ||
1da177e4 LT |
1203 | SCpnt->cmnd[1] |= (unsigned char) ((block >> 16) & 0x1f); |
1204 | SCpnt->cmnd[2] = (unsigned char) ((block >> 8) & 0xff); | |
1205 | SCpnt->cmnd[3] = (unsigned char) block & 0xff; | |
1206 | SCpnt->cmnd[4] = (unsigned char) this_count; | |
1207 | SCpnt->cmnd[5] = 0; | |
1208 | } | |
30b0c37b | 1209 | SCpnt->sdb.length = this_count * sdp->sector_size; |
1da177e4 LT |
1210 | |
1211 | /* | |
1212 | * We shouldn't disconnect in the middle of a sector, so with a dumb | |
1213 | * host adapter, it's safe to assume that we can at least transfer | |
1214 | * this many bytes between each connect / disconnect. | |
1215 | */ | |
1216 | SCpnt->transfersize = sdp->sector_size; | |
1217 | SCpnt->underflow = this_count << 9; | |
1218 | SCpnt->allowed = SD_MAX_RETRIES; | |
1da177e4 | 1219 | |
1da177e4 LT |
1220 | /* |
1221 | * This indicates that the command is ready from our end to be | |
1222 | * queued. | |
1223 | */ | |
7f9a6bc4 JB |
1224 | ret = BLKPREP_OK; |
1225 | out: | |
89d94756 | 1226 | if (zoned_write && ret != BLKPREP_OK) |
a90dfdc2 | 1227 | sd_zbc_write_unlock_zone(SCpnt); |
89d94756 | 1228 | |
a1b73fc1 | 1229 | return ret; |
1da177e4 LT |
1230 | } |
1231 | ||
87949eee CH |
1232 | static int sd_init_command(struct scsi_cmnd *cmd) |
1233 | { | |
1234 | struct request *rq = cmd->request; | |
1235 | ||
c2df40df MC |
1236 | switch (req_op(rq)) { |
1237 | case REQ_OP_DISCARD: | |
81d926e8 CH |
1238 | switch (scsi_disk(rq->rq_disk)->provisioning_mode) { |
1239 | case SD_LBP_UNMAP: | |
1240 | return sd_setup_unmap_cmnd(cmd); | |
1241 | case SD_LBP_WS16: | |
02d26103 | 1242 | return sd_setup_write_same16_cmnd(cmd, true); |
81d926e8 CH |
1243 | case SD_LBP_WS10: |
1244 | return sd_setup_write_same10_cmnd(cmd, true); | |
1245 | case SD_LBP_ZERO: | |
1246 | return sd_setup_write_same10_cmnd(cmd, false); | |
1247 | default: | |
1248 | return BLKPREP_INVALID; | |
1249 | } | |
02d26103 CH |
1250 | case REQ_OP_WRITE_ZEROES: |
1251 | return sd_setup_write_zeroes_cmnd(cmd); | |
c2df40df | 1252 | case REQ_OP_WRITE_SAME: |
87949eee | 1253 | return sd_setup_write_same_cmnd(cmd); |
3a5e02ce | 1254 | case REQ_OP_FLUSH: |
87949eee | 1255 | return sd_setup_flush_cmnd(cmd); |
c2df40df MC |
1256 | case REQ_OP_READ: |
1257 | case REQ_OP_WRITE: | |
87949eee | 1258 | return sd_setup_read_write_cmnd(cmd); |
89d94756 HR |
1259 | case REQ_OP_ZONE_REPORT: |
1260 | return sd_zbc_setup_report_cmnd(cmd); | |
1261 | case REQ_OP_ZONE_RESET: | |
1262 | return sd_zbc_setup_reset_cmnd(cmd); | |
c2df40df MC |
1263 | default: |
1264 | BUG(); | |
1265 | } | |
87949eee CH |
1266 | } |
1267 | ||
1268 | static void sd_uninit_command(struct scsi_cmnd *SCpnt) | |
1269 | { | |
1270 | struct request *rq = SCpnt->request; | |
1271 | ||
f9d03f96 CH |
1272 | if (rq->rq_flags & RQF_SPECIAL_PAYLOAD) |
1273 | __free_page(rq->special_vec.bv_page); | |
87949eee | 1274 | |
82ed4db4 | 1275 | if (SCpnt->cmnd != scsi_req(rq)->cmd) { |
87949eee CH |
1276 | mempool_free(SCpnt->cmnd, sd_cdb_pool); |
1277 | SCpnt->cmnd = NULL; | |
1278 | SCpnt->cmd_len = 0; | |
1279 | } | |
1280 | } | |
1281 | ||
1da177e4 LT |
1282 | /** |
1283 | * sd_open - open a scsi disk device | |
7529fbb0 DLM |
1284 | * @bdev: Block device of the scsi disk to open |
1285 | * @mode: FMODE_* mask | |
1da177e4 LT |
1286 | * |
1287 | * Returns 0 if successful. Returns a negated errno value in case | |
1288 | * of error. | |
1289 | * | |
1290 | * Note: This can be called from a user context (e.g. fsck(1) ) | |
1291 | * or from within the kernel (e.g. as a result of a mount(1) ). | |
1292 | * In the latter case @inode and @filp carry an abridged amount | |
1293 | * of information as noted above. | |
409f3499 AB |
1294 | * |
1295 | * Locking: called with bdev->bd_mutex held. | |
1da177e4 | 1296 | **/ |
0338e291 | 1297 | static int sd_open(struct block_device *bdev, fmode_t mode) |
1da177e4 | 1298 | { |
0338e291 | 1299 | struct scsi_disk *sdkp = scsi_disk_get(bdev->bd_disk); |
1da177e4 LT |
1300 | struct scsi_device *sdev; |
1301 | int retval; | |
1302 | ||
0338e291 | 1303 | if (!sdkp) |
1da177e4 LT |
1304 | return -ENXIO; |
1305 | ||
fa0d34be | 1306 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_open\n")); |
1da177e4 LT |
1307 | |
1308 | sdev = sdkp->device; | |
1309 | ||
1310 | /* | |
1311 | * If the device is in error recovery, wait until it is done. | |
1312 | * If the device is offline, then disallow any access to it. | |
1313 | */ | |
1314 | retval = -ENXIO; | |
1315 | if (!scsi_block_when_processing_errors(sdev)) | |
1316 | goto error_out; | |
1317 | ||
1318 | if (sdev->removable || sdkp->write_prot) | |
0338e291 | 1319 | check_disk_change(bdev); |
1da177e4 LT |
1320 | |
1321 | /* | |
1322 | * If the drive is empty, just let the open fail. | |
1323 | */ | |
1324 | retval = -ENOMEDIUM; | |
0338e291 | 1325 | if (sdev->removable && !sdkp->media_present && !(mode & FMODE_NDELAY)) |
1da177e4 LT |
1326 | goto error_out; |
1327 | ||
1328 | /* | |
1329 | * If the device has the write protect tab set, have the open fail | |
1330 | * if the user expects to be able to write to the thing. | |
1331 | */ | |
1332 | retval = -EROFS; | |
0338e291 | 1333 | if (sdkp->write_prot && (mode & FMODE_WRITE)) |
1da177e4 LT |
1334 | goto error_out; |
1335 | ||
1336 | /* | |
1337 | * It is possible that the disk changing stuff resulted in | |
1338 | * the device being taken offline. If this is the case, | |
1339 | * report this to the user, and don't pretend that the | |
1340 | * open actually succeeded. | |
1341 | */ | |
1342 | retval = -ENXIO; | |
1343 | if (!scsi_device_online(sdev)) | |
1344 | goto error_out; | |
1345 | ||
409f3499 | 1346 | if ((atomic_inc_return(&sdkp->openers) == 1) && sdev->removable) { |
1da177e4 LT |
1347 | if (scsi_block_when_processing_errors(sdev)) |
1348 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT); | |
1349 | } | |
1350 | ||
1351 | return 0; | |
1352 | ||
1353 | error_out: | |
1354 | scsi_disk_put(sdkp); | |
1355 | return retval; | |
1356 | } | |
1357 | ||
1358 | /** | |
1359 | * sd_release - invoked when the (last) close(2) is called on this | |
1360 | * scsi disk. | |
7529fbb0 DLM |
1361 | * @disk: disk to release |
1362 | * @mode: FMODE_* mask | |
1da177e4 LT |
1363 | * |
1364 | * Returns 0. | |
1365 | * | |
1366 | * Note: may block (uninterruptible) if error recovery is underway | |
1367 | * on this disk. | |
409f3499 AB |
1368 | * |
1369 | * Locking: called with bdev->bd_mutex held. | |
1da177e4 | 1370 | **/ |
db2a144b | 1371 | static void sd_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 1372 | { |
1da177e4 LT |
1373 | struct scsi_disk *sdkp = scsi_disk(disk); |
1374 | struct scsi_device *sdev = sdkp->device; | |
1375 | ||
56937f7b | 1376 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_release\n")); |
1da177e4 | 1377 | |
7e443312 | 1378 | if (atomic_dec_return(&sdkp->openers) == 0 && sdev->removable) { |
1da177e4 LT |
1379 | if (scsi_block_when_processing_errors(sdev)) |
1380 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW); | |
1381 | } | |
1382 | ||
1383 | /* | |
1384 | * XXX and what if there are packets in flight and this close() | |
1385 | * XXX is followed by a "rmmod sd_mod"? | |
1386 | */ | |
478a8a05 | 1387 | |
1da177e4 | 1388 | scsi_disk_put(sdkp); |
1da177e4 LT |
1389 | } |
1390 | ||
a885c8c4 | 1391 | static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
1da177e4 LT |
1392 | { |
1393 | struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk); | |
1394 | struct scsi_device *sdp = sdkp->device; | |
1395 | struct Scsi_Host *host = sdp->host; | |
f08bb1e0 | 1396 | sector_t capacity = logical_to_sectors(sdp, sdkp->capacity); |
1da177e4 LT |
1397 | int diskinfo[4]; |
1398 | ||
1399 | /* default to most commonly used values */ | |
f08bb1e0 MP |
1400 | diskinfo[0] = 0x40; /* 1 << 6 */ |
1401 | diskinfo[1] = 0x20; /* 1 << 5 */ | |
1402 | diskinfo[2] = capacity >> 11; | |
1403 | ||
1da177e4 LT |
1404 | /* override with calculated, extended default, or driver values */ |
1405 | if (host->hostt->bios_param) | |
f08bb1e0 | 1406 | host->hostt->bios_param(sdp, bdev, capacity, diskinfo); |
1da177e4 | 1407 | else |
f08bb1e0 | 1408 | scsicam_bios_param(bdev, capacity, diskinfo); |
1da177e4 | 1409 | |
a885c8c4 CH |
1410 | geo->heads = diskinfo[0]; |
1411 | geo->sectors = diskinfo[1]; | |
1412 | geo->cylinders = diskinfo[2]; | |
1da177e4 LT |
1413 | return 0; |
1414 | } | |
1415 | ||
1416 | /** | |
1417 | * sd_ioctl - process an ioctl | |
7529fbb0 DLM |
1418 | * @bdev: target block device |
1419 | * @mode: FMODE_* mask | |
1da177e4 LT |
1420 | * @cmd: ioctl command number |
1421 | * @arg: this is third argument given to ioctl(2) system call. | |
1422 | * Often contains a pointer. | |
1423 | * | |
25985edc | 1424 | * Returns 0 if successful (some ioctls return positive numbers on |
1da177e4 LT |
1425 | * success as well). Returns a negated errno value in case of error. |
1426 | * | |
1427 | * Note: most ioctls are forward onto the block subsystem or further | |
3a4fa0a2 | 1428 | * down in the scsi subsystem. |
1da177e4 | 1429 | **/ |
0338e291 | 1430 | static int sd_ioctl(struct block_device *bdev, fmode_t mode, |
1da177e4 LT |
1431 | unsigned int cmd, unsigned long arg) |
1432 | { | |
1da177e4 | 1433 | struct gendisk *disk = bdev->bd_disk; |
fe2d1851 NN |
1434 | struct scsi_disk *sdkp = scsi_disk(disk); |
1435 | struct scsi_device *sdp = sdkp->device; | |
1da177e4 LT |
1436 | void __user *p = (void __user *)arg; |
1437 | int error; | |
1438 | ||
fe2d1851 NN |
1439 | SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO, sdkp, "sd_ioctl: disk=%s, " |
1440 | "cmd=0x%x\n", disk->disk_name, cmd)); | |
1da177e4 | 1441 | |
0bfc96cb PB |
1442 | error = scsi_verify_blk_ioctl(bdev, cmd); |
1443 | if (error < 0) | |
1444 | return error; | |
1445 | ||
1da177e4 LT |
1446 | /* |
1447 | * If we are in the middle of error recovery, don't let anyone | |
1448 | * else try and use this device. Also, if error recovery fails, it | |
1449 | * may try and take the device offline, in which case all further | |
1450 | * access to the device is prohibited. | |
1451 | */ | |
906d15fb CH |
1452 | error = scsi_ioctl_block_when_processing_errors(sdp, cmd, |
1453 | (mode & FMODE_NDELAY) != 0); | |
1454 | if (error) | |
8a6cfeb6 | 1455 | goto out; |
1da177e4 | 1456 | |
1da177e4 LT |
1457 | /* |
1458 | * Send SCSI addressing ioctls directly to mid level, send other | |
1459 | * ioctls to block level and then onto mid level if they can't be | |
1460 | * resolved. | |
1461 | */ | |
1462 | switch (cmd) { | |
1463 | case SCSI_IOCTL_GET_IDLUN: | |
1464 | case SCSI_IOCTL_GET_BUS_NUMBER: | |
8a6cfeb6 AB |
1465 | error = scsi_ioctl(sdp, cmd, p); |
1466 | break; | |
1da177e4 | 1467 | default: |
577ebb37 | 1468 | error = scsi_cmd_blk_ioctl(bdev, mode, cmd, p); |
1da177e4 | 1469 | if (error != -ENOTTY) |
8a6cfeb6 AB |
1470 | break; |
1471 | error = scsi_ioctl(sdp, cmd, p); | |
1472 | break; | |
1da177e4 | 1473 | } |
8a6cfeb6 | 1474 | out: |
8a6cfeb6 | 1475 | return error; |
1da177e4 LT |
1476 | } |
1477 | ||
1478 | static void set_media_not_present(struct scsi_disk *sdkp) | |
1479 | { | |
2bae0093 TH |
1480 | if (sdkp->media_present) |
1481 | sdkp->device->changed = 1; | |
1482 | ||
1483 | if (sdkp->device->removable) { | |
1484 | sdkp->media_present = 0; | |
1485 | sdkp->capacity = 0; | |
1486 | } | |
1487 | } | |
1488 | ||
1489 | static int media_not_present(struct scsi_disk *sdkp, | |
1490 | struct scsi_sense_hdr *sshdr) | |
1491 | { | |
1492 | if (!scsi_sense_valid(sshdr)) | |
1493 | return 0; | |
1494 | ||
1495 | /* not invoked for commands that could return deferred errors */ | |
1496 | switch (sshdr->sense_key) { | |
1497 | case UNIT_ATTENTION: | |
1498 | case NOT_READY: | |
1499 | /* medium not present */ | |
1500 | if (sshdr->asc == 0x3A) { | |
1501 | set_media_not_present(sdkp); | |
1502 | return 1; | |
1503 | } | |
1504 | } | |
1505 | return 0; | |
1da177e4 LT |
1506 | } |
1507 | ||
1508 | /** | |
2bae0093 TH |
1509 | * sd_check_events - check media events |
1510 | * @disk: kernel device descriptor | |
1511 | * @clearing: disk events currently being cleared | |
1da177e4 | 1512 | * |
2bae0093 | 1513 | * Returns mask of DISK_EVENT_*. |
1da177e4 LT |
1514 | * |
1515 | * Note: this function is invoked from the block subsystem. | |
1516 | **/ | |
2bae0093 | 1517 | static unsigned int sd_check_events(struct gendisk *disk, unsigned int clearing) |
1da177e4 | 1518 | { |
eb72d0bb HR |
1519 | struct scsi_disk *sdkp = scsi_disk_get(disk); |
1520 | struct scsi_device *sdp; | |
1da177e4 LT |
1521 | int retval; |
1522 | ||
eb72d0bb HR |
1523 | if (!sdkp) |
1524 | return 0; | |
1525 | ||
1526 | sdp = sdkp->device; | |
2bae0093 | 1527 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_check_events\n")); |
1da177e4 LT |
1528 | |
1529 | /* | |
1530 | * If the device is offline, don't send any commands - just pretend as | |
1531 | * if the command failed. If the device ever comes back online, we | |
1532 | * can deal with it then. It is only because of unrecoverable errors | |
1533 | * that we would ever take a device offline in the first place. | |
1534 | */ | |
285e9670 KS |
1535 | if (!scsi_device_online(sdp)) { |
1536 | set_media_not_present(sdkp); | |
285e9670 KS |
1537 | goto out; |
1538 | } | |
1da177e4 LT |
1539 | |
1540 | /* | |
1541 | * Using TEST_UNIT_READY enables differentiation between drive with | |
1542 | * no cartridge loaded - NOT READY, drive with changed cartridge - | |
1543 | * UNIT ATTENTION, or with same cartridge - GOOD STATUS. | |
1544 | * | |
1545 | * Drives that auto spin down. eg iomega jaz 1G, will be started | |
1546 | * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever | |
1547 | * sd_revalidate() is called. | |
1548 | */ | |
001aac25 | 1549 | if (scsi_block_when_processing_errors(sdp)) { |
6fa2b8f9 CH |
1550 | struct scsi_sense_hdr sshdr = { 0, }; |
1551 | ||
001aac25 | 1552 | retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, SD_MAX_RETRIES, |
6fa2b8f9 | 1553 | &sshdr); |
1da177e4 | 1554 | |
6fa2b8f9 CH |
1555 | /* failed to execute TUR, assume media not present */ |
1556 | if (host_byte(retval)) { | |
1557 | set_media_not_present(sdkp); | |
1558 | goto out; | |
1559 | } | |
1da177e4 | 1560 | |
6fa2b8f9 CH |
1561 | if (media_not_present(sdkp, &sshdr)) |
1562 | goto out; | |
1563 | } | |
2bae0093 | 1564 | |
1da177e4 LT |
1565 | /* |
1566 | * For removable scsi disk we have to recognise the presence | |
2bae0093 | 1567 | * of a disk in the drive. |
1da177e4 | 1568 | */ |
2bae0093 TH |
1569 | if (!sdkp->media_present) |
1570 | sdp->changed = 1; | |
1da177e4 | 1571 | sdkp->media_present = 1; |
285e9670 | 1572 | out: |
3ff5588d | 1573 | /* |
2bae0093 | 1574 | * sdp->changed is set under the following conditions: |
3ff5588d | 1575 | * |
2bae0093 TH |
1576 | * Medium present state has changed in either direction. |
1577 | * Device has indicated UNIT_ATTENTION. | |
3ff5588d | 1578 | */ |
2bae0093 TH |
1579 | retval = sdp->changed ? DISK_EVENT_MEDIA_CHANGE : 0; |
1580 | sdp->changed = 0; | |
eb72d0bb | 1581 | scsi_disk_put(sdkp); |
1da177e4 | 1582 | return retval; |
1da177e4 LT |
1583 | } |
1584 | ||
4fa83244 | 1585 | static int sd_sync_cache(struct scsi_disk *sdkp, struct scsi_sense_hdr *sshdr) |
1da177e4 | 1586 | { |
1da177e4 | 1587 | int retries, res; |
e73aec82 | 1588 | struct scsi_device *sdp = sdkp->device; |
7e660100 JB |
1589 | const int timeout = sdp->request_queue->rq_timeout |
1590 | * SD_FLUSH_TIMEOUT_MULTIPLIER; | |
4fa83244 | 1591 | struct scsi_sense_hdr my_sshdr; |
1da177e4 LT |
1592 | |
1593 | if (!scsi_device_online(sdp)) | |
1594 | return -ENODEV; | |
1595 | ||
4fa83244 DB |
1596 | /* caller might not be interested in sense, but we need it */ |
1597 | if (!sshdr) | |
1598 | sshdr = &my_sshdr; | |
1599 | ||
1da177e4 LT |
1600 | for (retries = 3; retries > 0; --retries) { |
1601 | unsigned char cmd[10] = { 0 }; | |
1602 | ||
1603 | cmd[0] = SYNCHRONIZE_CACHE; | |
1604 | /* | |
1605 | * Leave the rest of the command zero to indicate | |
1606 | * flush everything. | |
1607 | */ | |
4fa83244 | 1608 | res = scsi_execute(sdp, cmd, DMA_NONE, NULL, 0, NULL, sshdr, |
fcbfffe2 | 1609 | timeout, SD_MAX_RETRIES, 0, RQF_PM, NULL); |
ea73a9f2 | 1610 | if (res == 0) |
1da177e4 LT |
1611 | break; |
1612 | } | |
1613 | ||
e73aec82 | 1614 | if (res) { |
ef61329d | 1615 | sd_print_result(sdkp, "Synchronize Cache(10) failed", res); |
95897910 | 1616 | |
e73aec82 | 1617 | if (driver_byte(res) & DRIVER_SENSE) |
4fa83244 DB |
1618 | sd_print_sense_hdr(sdkp, sshdr); |
1619 | ||
95897910 | 1620 | /* we need to evaluate the error return */ |
4fa83244 DB |
1621 | if (scsi_sense_valid(sshdr) && |
1622 | (sshdr->asc == 0x3a || /* medium not present */ | |
1623 | sshdr->asc == 0x20)) /* invalid command */ | |
95897910 ON |
1624 | /* this is no error here */ |
1625 | return 0; | |
1626 | ||
1627 | switch (host_byte(res)) { | |
1628 | /* ignore errors due to racing a disconnection */ | |
1629 | case DID_BAD_TARGET: | |
1630 | case DID_NO_CONNECT: | |
1631 | return 0; | |
1632 | /* signal the upper layer it might try again */ | |
1633 | case DID_BUS_BUSY: | |
1634 | case DID_IMM_RETRY: | |
1635 | case DID_REQUEUE: | |
1636 | case DID_SOFT_ERROR: | |
1637 | return -EBUSY; | |
1638 | default: | |
1639 | return -EIO; | |
1640 | } | |
1da177e4 | 1641 | } |
3721050a | 1642 | return 0; |
1da177e4 LT |
1643 | } |
1644 | ||
1da177e4 LT |
1645 | static void sd_rescan(struct device *dev) |
1646 | { | |
3d9a1f53 | 1647 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
39b7f1e2 | 1648 | |
3d9a1f53 | 1649 | revalidate_disk(sdkp->disk); |
1da177e4 LT |
1650 | } |
1651 | ||
1652 | ||
1653 | #ifdef CONFIG_COMPAT | |
1654 | /* | |
1655 | * This gets directly called from VFS. When the ioctl | |
1656 | * is not recognized we go back to the other translation paths. | |
1657 | */ | |
0338e291 AV |
1658 | static int sd_compat_ioctl(struct block_device *bdev, fmode_t mode, |
1659 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1660 | { |
0338e291 | 1661 | struct scsi_device *sdev = scsi_disk(bdev->bd_disk)->device; |
21a9d4c9 | 1662 | int error; |
1da177e4 | 1663 | |
21a9d4c9 CH |
1664 | error = scsi_ioctl_block_when_processing_errors(sdev, cmd, |
1665 | (mode & FMODE_NDELAY) != 0); | |
1666 | if (error) | |
1667 | return error; | |
1da177e4 | 1668 | |
1da177e4 LT |
1669 | /* |
1670 | * Let the static ioctl translation table take care of it. | |
1671 | */ | |
21a9d4c9 CH |
1672 | if (!sdev->host->hostt->compat_ioctl) |
1673 | return -ENOIOCTLCMD; | |
1674 | return sdev->host->hostt->compat_ioctl(sdev, cmd, (void __user *)arg); | |
1da177e4 LT |
1675 | } |
1676 | #endif | |
1677 | ||
924d55b0 CH |
1678 | static char sd_pr_type(enum pr_type type) |
1679 | { | |
1680 | switch (type) { | |
1681 | case PR_WRITE_EXCLUSIVE: | |
1682 | return 0x01; | |
1683 | case PR_EXCLUSIVE_ACCESS: | |
1684 | return 0x03; | |
1685 | case PR_WRITE_EXCLUSIVE_REG_ONLY: | |
1686 | return 0x05; | |
1687 | case PR_EXCLUSIVE_ACCESS_REG_ONLY: | |
1688 | return 0x06; | |
1689 | case PR_WRITE_EXCLUSIVE_ALL_REGS: | |
1690 | return 0x07; | |
1691 | case PR_EXCLUSIVE_ACCESS_ALL_REGS: | |
1692 | return 0x08; | |
1693 | default: | |
1694 | return 0; | |
1695 | } | |
1696 | }; | |
1697 | ||
1698 | static int sd_pr_command(struct block_device *bdev, u8 sa, | |
1699 | u64 key, u64 sa_key, u8 type, u8 flags) | |
1700 | { | |
1701 | struct scsi_device *sdev = scsi_disk(bdev->bd_disk)->device; | |
1702 | struct scsi_sense_hdr sshdr; | |
1703 | int result; | |
1704 | u8 cmd[16] = { 0, }; | |
1705 | u8 data[24] = { 0, }; | |
1706 | ||
1707 | cmd[0] = PERSISTENT_RESERVE_OUT; | |
1708 | cmd[1] = sa; | |
1709 | cmd[2] = type; | |
1710 | put_unaligned_be32(sizeof(data), &cmd[5]); | |
1711 | ||
1712 | put_unaligned_be64(key, &data[0]); | |
1713 | put_unaligned_be64(sa_key, &data[8]); | |
1714 | data[20] = flags; | |
1715 | ||
1716 | result = scsi_execute_req(sdev, cmd, DMA_TO_DEVICE, &data, sizeof(data), | |
1717 | &sshdr, SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
1718 | ||
1719 | if ((driver_byte(result) & DRIVER_SENSE) && | |
1720 | (scsi_sense_valid(&sshdr))) { | |
1721 | sdev_printk(KERN_INFO, sdev, "PR command failed: %d\n", result); | |
1722 | scsi_print_sense_hdr(sdev, NULL, &sshdr); | |
1723 | } | |
1724 | ||
1725 | return result; | |
1726 | } | |
1727 | ||
1728 | static int sd_pr_register(struct block_device *bdev, u64 old_key, u64 new_key, | |
1729 | u32 flags) | |
1730 | { | |
1731 | if (flags & ~PR_FL_IGNORE_KEY) | |
1732 | return -EOPNOTSUPP; | |
1733 | return sd_pr_command(bdev, (flags & PR_FL_IGNORE_KEY) ? 0x06 : 0x00, | |
1734 | old_key, new_key, 0, | |
01f90dd9 | 1735 | (1 << 0) /* APTPL */); |
924d55b0 CH |
1736 | } |
1737 | ||
1738 | static int sd_pr_reserve(struct block_device *bdev, u64 key, enum pr_type type, | |
1739 | u32 flags) | |
1740 | { | |
1741 | if (flags) | |
1742 | return -EOPNOTSUPP; | |
1743 | return sd_pr_command(bdev, 0x01, key, 0, sd_pr_type(type), 0); | |
1744 | } | |
1745 | ||
1746 | static int sd_pr_release(struct block_device *bdev, u64 key, enum pr_type type) | |
1747 | { | |
1748 | return sd_pr_command(bdev, 0x02, key, 0, sd_pr_type(type), 0); | |
1749 | } | |
1750 | ||
1751 | static int sd_pr_preempt(struct block_device *bdev, u64 old_key, u64 new_key, | |
1752 | enum pr_type type, bool abort) | |
1753 | { | |
1754 | return sd_pr_command(bdev, abort ? 0x05 : 0x04, old_key, new_key, | |
1755 | sd_pr_type(type), 0); | |
1756 | } | |
1757 | ||
1758 | static int sd_pr_clear(struct block_device *bdev, u64 key) | |
1759 | { | |
1760 | return sd_pr_command(bdev, 0x03, key, 0, 0, 0); | |
1761 | } | |
1762 | ||
1763 | static const struct pr_ops sd_pr_ops = { | |
1764 | .pr_register = sd_pr_register, | |
1765 | .pr_reserve = sd_pr_reserve, | |
1766 | .pr_release = sd_pr_release, | |
1767 | .pr_preempt = sd_pr_preempt, | |
1768 | .pr_clear = sd_pr_clear, | |
1769 | }; | |
1770 | ||
83d5cde4 | 1771 | static const struct block_device_operations sd_fops = { |
1da177e4 | 1772 | .owner = THIS_MODULE, |
0338e291 AV |
1773 | .open = sd_open, |
1774 | .release = sd_release, | |
8a6cfeb6 | 1775 | .ioctl = sd_ioctl, |
a885c8c4 | 1776 | .getgeo = sd_getgeo, |
1da177e4 | 1777 | #ifdef CONFIG_COMPAT |
0338e291 | 1778 | .compat_ioctl = sd_compat_ioctl, |
1da177e4 | 1779 | #endif |
2bae0093 | 1780 | .check_events = sd_check_events, |
1da177e4 | 1781 | .revalidate_disk = sd_revalidate_disk, |
72ec24bd | 1782 | .unlock_native_capacity = sd_unlock_native_capacity, |
924d55b0 | 1783 | .pr_ops = &sd_pr_ops, |
1da177e4 LT |
1784 | }; |
1785 | ||
7a38dc0b HR |
1786 | /** |
1787 | * sd_eh_reset - reset error handling callback | |
1788 | * @scmd: sd-issued command that has failed | |
1789 | * | |
1790 | * This function is called by the SCSI midlayer before starting | |
1791 | * SCSI EH. When counting medium access failures we have to be | |
1792 | * careful to register it only only once per device and SCSI EH run; | |
1793 | * there might be several timed out commands which will cause the | |
1794 | * 'max_medium_access_timeouts' counter to trigger after the first | |
1795 | * SCSI EH run already and set the device to offline. | |
1796 | * So this function resets the internal counter before starting SCSI EH. | |
1797 | **/ | |
1798 | static void sd_eh_reset(struct scsi_cmnd *scmd) | |
1799 | { | |
1800 | struct scsi_disk *sdkp = scsi_disk(scmd->request->rq_disk); | |
1801 | ||
1802 | /* New SCSI EH run, reset gate variable */ | |
1803 | sdkp->ignore_medium_access_errors = false; | |
1804 | } | |
1805 | ||
18a4d0a2 MP |
1806 | /** |
1807 | * sd_eh_action - error handling callback | |
1808 | * @scmd: sd-issued command that has failed | |
18a4d0a2 MP |
1809 | * @eh_disp: The recovery disposition suggested by the midlayer |
1810 | * | |
2451079b JB |
1811 | * This function is called by the SCSI midlayer upon completion of an |
1812 | * error test command (currently TEST UNIT READY). The result of sending | |
1813 | * the eh command is passed in eh_disp. We're looking for devices that | |
1814 | * fail medium access commands but are OK with non access commands like | |
1815 | * test unit ready (so wrongly see the device as having a successful | |
1816 | * recovery) | |
18a4d0a2 | 1817 | **/ |
2451079b | 1818 | static int sd_eh_action(struct scsi_cmnd *scmd, int eh_disp) |
18a4d0a2 MP |
1819 | { |
1820 | struct scsi_disk *sdkp = scsi_disk(scmd->request->rq_disk); | |
1821 | ||
1822 | if (!scsi_device_online(scmd->device) || | |
2451079b JB |
1823 | !scsi_medium_access_command(scmd) || |
1824 | host_byte(scmd->result) != DID_TIME_OUT || | |
1825 | eh_disp != SUCCESS) | |
18a4d0a2 MP |
1826 | return eh_disp; |
1827 | ||
1828 | /* | |
1829 | * The device has timed out executing a medium access command. | |
1830 | * However, the TEST UNIT READY command sent during error | |
1831 | * handling completed successfully. Either the device is in the | |
1832 | * process of recovering or has it suffered an internal failure | |
1833 | * that prevents access to the storage medium. | |
1834 | */ | |
7a38dc0b HR |
1835 | if (!sdkp->ignore_medium_access_errors) { |
1836 | sdkp->medium_access_timed_out++; | |
1837 | sdkp->ignore_medium_access_errors = true; | |
1838 | } | |
18a4d0a2 MP |
1839 | |
1840 | /* | |
1841 | * If the device keeps failing read/write commands but TEST UNIT | |
1842 | * READY always completes successfully we assume that medium | |
1843 | * access is no longer possible and take the device offline. | |
1844 | */ | |
1845 | if (sdkp->medium_access_timed_out >= sdkp->max_medium_access_timeouts) { | |
1846 | scmd_printk(KERN_ERR, scmd, | |
1847 | "Medium access timeout failure. Offlining disk!\n"); | |
1848 | scsi_device_set_state(scmd->device, SDEV_OFFLINE); | |
1849 | ||
e8f8d50e | 1850 | return SUCCESS; |
18a4d0a2 MP |
1851 | } |
1852 | ||
1853 | return eh_disp; | |
1854 | } | |
1855 | ||
af55ff67 MP |
1856 | static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd) |
1857 | { | |
6eadc612 DLM |
1858 | struct request *req = scmd->request; |
1859 | struct scsi_device *sdev = scmd->device; | |
1860 | unsigned int transferred, good_bytes; | |
1861 | u64 start_lba, end_lba, bad_lba; | |
1862 | ||
a8733c7b | 1863 | /* |
6eadc612 DLM |
1864 | * Some commands have a payload smaller than the device logical |
1865 | * block size (e.g. INQUIRY on a 4K disk). | |
a8733c7b | 1866 | */ |
6eadc612 | 1867 | if (scsi_bufflen(scmd) <= sdev->sector_size) |
af55ff67 MP |
1868 | return 0; |
1869 | ||
6eadc612 DLM |
1870 | /* Check if we have a 'bad_lba' information */ |
1871 | if (!scsi_get_sense_info_fld(scmd->sense_buffer, | |
1872 | SCSI_SENSE_BUFFERSIZE, | |
1873 | &bad_lba)) | |
af55ff67 MP |
1874 | return 0; |
1875 | ||
6eadc612 DLM |
1876 | /* |
1877 | * If the bad lba was reported incorrectly, we have no idea where | |
af55ff67 MP |
1878 | * the error is. |
1879 | */ | |
6eadc612 DLM |
1880 | start_lba = sectors_to_logical(sdev, blk_rq_pos(req)); |
1881 | end_lba = start_lba + bytes_to_logical(sdev, scsi_bufflen(scmd)); | |
1882 | if (bad_lba < start_lba || bad_lba >= end_lba) | |
af55ff67 MP |
1883 | return 0; |
1884 | ||
6eadc612 DLM |
1885 | /* |
1886 | * resid is optional but mostly filled in. When it's unused, | |
1887 | * its value is zero, so we assume the whole buffer transferred | |
af55ff67 | 1888 | */ |
6eadc612 DLM |
1889 | transferred = scsi_bufflen(scmd) - scsi_get_resid(scmd); |
1890 | ||
1891 | /* This computation should always be done in terms of the | |
1892 | * resolution of the device's medium. | |
af55ff67 | 1893 | */ |
6eadc612 DLM |
1894 | good_bytes = logical_to_bytes(sdev, bad_lba - start_lba); |
1895 | ||
a8733c7b | 1896 | return min(good_bytes, transferred); |
af55ff67 MP |
1897 | } |
1898 | ||
1da177e4 | 1899 | /** |
7b3d9545 | 1900 | * sd_done - bottom half handler: called when the lower level |
1da177e4 LT |
1901 | * driver has completed (successfully or otherwise) a scsi command. |
1902 | * @SCpnt: mid-level's per command structure. | |
1903 | * | |
1904 | * Note: potentially run from within an ISR. Must not block. | |
1905 | **/ | |
7b3d9545 | 1906 | static int sd_done(struct scsi_cmnd *SCpnt) |
1da177e4 LT |
1907 | { |
1908 | int result = SCpnt->result; | |
af55ff67 | 1909 | unsigned int good_bytes = result ? 0 : scsi_bufflen(SCpnt); |
c46f0917 DLM |
1910 | unsigned int sector_size = SCpnt->device->sector_size; |
1911 | unsigned int resid; | |
1da177e4 | 1912 | struct scsi_sense_hdr sshdr; |
4e7392ec | 1913 | struct scsi_disk *sdkp = scsi_disk(SCpnt->request->rq_disk); |
26e85fcd | 1914 | struct request *req = SCpnt->request; |
1da177e4 LT |
1915 | int sense_valid = 0; |
1916 | int sense_deferred = 0; | |
1da177e4 | 1917 | |
89d94756 HR |
1918 | switch (req_op(req)) { |
1919 | case REQ_OP_DISCARD: | |
02d26103 | 1920 | case REQ_OP_WRITE_ZEROES: |
89d94756 HR |
1921 | case REQ_OP_WRITE_SAME: |
1922 | case REQ_OP_ZONE_RESET: | |
26e85fcd MP |
1923 | if (!result) { |
1924 | good_bytes = blk_rq_bytes(req); | |
1925 | scsi_set_resid(SCpnt, 0); | |
1926 | } else { | |
1927 | good_bytes = 0; | |
1928 | scsi_set_resid(SCpnt, blk_rq_bytes(req)); | |
1929 | } | |
89d94756 HR |
1930 | break; |
1931 | case REQ_OP_ZONE_REPORT: | |
1932 | if (!result) { | |
1933 | good_bytes = scsi_bufflen(SCpnt) | |
1934 | - scsi_get_resid(SCpnt); | |
1935 | scsi_set_resid(SCpnt, 0); | |
1936 | } else { | |
1937 | good_bytes = 0; | |
1938 | scsi_set_resid(SCpnt, blk_rq_bytes(req)); | |
1939 | } | |
1940 | break; | |
c46f0917 DLM |
1941 | default: |
1942 | /* | |
1943 | * In case of bogus fw or device, we could end up having | |
1944 | * an unaligned partial completion. Check this here and force | |
1945 | * alignment. | |
1946 | */ | |
1947 | resid = scsi_get_resid(SCpnt); | |
1948 | if (resid & (sector_size - 1)) { | |
1949 | sd_printk(KERN_INFO, sdkp, | |
1950 | "Unaligned partial completion (resid=%u, sector_sz=%u)\n", | |
1951 | resid, sector_size); | |
1952 | resid = min(scsi_bufflen(SCpnt), | |
1953 | round_up(resid, sector_size)); | |
1954 | scsi_set_resid(SCpnt, resid); | |
1955 | } | |
26e85fcd | 1956 | } |
6a32a8ae | 1957 | |
1da177e4 LT |
1958 | if (result) { |
1959 | sense_valid = scsi_command_normalize_sense(SCpnt, &sshdr); | |
1960 | if (sense_valid) | |
1961 | sense_deferred = scsi_sense_is_deferred(&sshdr); | |
1962 | } | |
2a863ba8 DJ |
1963 | sdkp->medium_access_timed_out = 0; |
1964 | ||
03aba2f7 LT |
1965 | if (driver_byte(result) != DRIVER_SENSE && |
1966 | (!sense_valid || sense_deferred)) | |
1967 | goto out; | |
1968 | ||
1969 | switch (sshdr.sense_key) { | |
1970 | case HARDWARE_ERROR: | |
1971 | case MEDIUM_ERROR: | |
af55ff67 | 1972 | good_bytes = sd_completed_bytes(SCpnt); |
03aba2f7 LT |
1973 | break; |
1974 | case RECOVERED_ERROR: | |
af55ff67 MP |
1975 | good_bytes = scsi_bufflen(SCpnt); |
1976 | break; | |
10dab226 JW |
1977 | case NO_SENSE: |
1978 | /* This indicates a false check condition, so ignore it. An | |
1979 | * unknown amount of data was transferred so treat it as an | |
1980 | * error. | |
1981 | */ | |
10dab226 JW |
1982 | SCpnt->result = 0; |
1983 | memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); | |
1984 | break; | |
c98a0eb0 MP |
1985 | case ABORTED_COMMAND: |
1986 | if (sshdr.asc == 0x10) /* DIF: Target detected corruption */ | |
1987 | good_bytes = sd_completed_bytes(SCpnt); | |
1988 | break; | |
1989 | case ILLEGAL_REQUEST: | |
d227ec26 CH |
1990 | switch (sshdr.asc) { |
1991 | case 0x10: /* DIX: Host detected corruption */ | |
af55ff67 | 1992 | good_bytes = sd_completed_bytes(SCpnt); |
d227ec26 CH |
1993 | break; |
1994 | case 0x20: /* INVALID COMMAND OPCODE */ | |
1995 | case 0x24: /* INVALID FIELD IN CDB */ | |
1996 | switch (SCpnt->cmnd[0]) { | |
5db44863 MP |
1997 | case UNMAP: |
1998 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
1999 | break; | |
2000 | case WRITE_SAME_16: | |
2001 | case WRITE_SAME: | |
d227ec26 | 2002 | if (SCpnt->cmnd[1] & 8) { /* UNMAP */ |
5db44863 | 2003 | sd_config_discard(sdkp, SD_LBP_DISABLE); |
d227ec26 | 2004 | } else { |
5db44863 MP |
2005 | sdkp->device->no_write_same = 1; |
2006 | sd_config_write_same(sdkp); | |
5db44863 | 2007 | req->__data_len = blk_rq_bytes(req); |
e8064021 | 2008 | req->rq_flags |= RQF_QUIET; |
5db44863 | 2009 | } |
d227ec26 | 2010 | break; |
5db44863 MP |
2011 | } |
2012 | } | |
03aba2f7 LT |
2013 | break; |
2014 | default: | |
2015 | break; | |
1da177e4 | 2016 | } |
89d94756 | 2017 | |
03aba2f7 | 2018 | out: |
89d94756 HR |
2019 | if (sd_is_zoned(sdkp)) |
2020 | sd_zbc_complete(SCpnt, good_bytes, &sshdr); | |
2021 | ||
ef61329d HR |
2022 | SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO, SCpnt, |
2023 | "sd_done: completed %d of %d bytes\n", | |
2024 | good_bytes, scsi_bufflen(SCpnt))); | |
2025 | ||
af55ff67 MP |
2026 | if (rq_data_dir(SCpnt->request) == READ && scsi_prot_sg_count(SCpnt)) |
2027 | sd_dif_complete(SCpnt, good_bytes); | |
2028 | ||
7b3d9545 | 2029 | return good_bytes; |
1da177e4 LT |
2030 | } |
2031 | ||
1da177e4 LT |
2032 | /* |
2033 | * spinup disk - called only in sd_revalidate_disk() | |
2034 | */ | |
2035 | static void | |
e73aec82 | 2036 | sd_spinup_disk(struct scsi_disk *sdkp) |
ea73a9f2 | 2037 | { |
1da177e4 | 2038 | unsigned char cmd[10]; |
4451e472 | 2039 | unsigned long spintime_expire = 0; |
1da177e4 LT |
2040 | int retries, spintime; |
2041 | unsigned int the_result; | |
2042 | struct scsi_sense_hdr sshdr; | |
2043 | int sense_valid = 0; | |
2044 | ||
2045 | spintime = 0; | |
2046 | ||
2047 | /* Spin up drives, as required. Only do this at boot time */ | |
2048 | /* Spinup needs to be done for module loads too. */ | |
2049 | do { | |
2050 | retries = 0; | |
2051 | ||
2052 | do { | |
2053 | cmd[0] = TEST_UNIT_READY; | |
2054 | memset((void *) &cmd[1], 0, 9); | |
2055 | ||
ea73a9f2 JB |
2056 | the_result = scsi_execute_req(sdkp->device, cmd, |
2057 | DMA_NONE, NULL, 0, | |
2058 | &sshdr, SD_TIMEOUT, | |
f4f4e47e | 2059 | SD_MAX_RETRIES, NULL); |
1da177e4 | 2060 | |
b4d38e38 AS |
2061 | /* |
2062 | * If the drive has indicated to us that it | |
2063 | * doesn't have any media in it, don't bother | |
2064 | * with any more polling. | |
2065 | */ | |
2066 | if (media_not_present(sdkp, &sshdr)) | |
2067 | return; | |
2068 | ||
1da177e4 | 2069 | if (the_result) |
ea73a9f2 | 2070 | sense_valid = scsi_sense_valid(&sshdr); |
1da177e4 LT |
2071 | retries++; |
2072 | } while (retries < 3 && | |
2073 | (!scsi_status_is_good(the_result) || | |
2074 | ((driver_byte(the_result) & DRIVER_SENSE) && | |
2075 | sense_valid && sshdr.sense_key == UNIT_ATTENTION))); | |
2076 | ||
1da177e4 LT |
2077 | if ((driver_byte(the_result) & DRIVER_SENSE) == 0) { |
2078 | /* no sense, TUR either succeeded or failed | |
2079 | * with a status error */ | |
e73aec82 | 2080 | if(!spintime && !scsi_status_is_good(the_result)) { |
ef61329d HR |
2081 | sd_print_result(sdkp, "Test Unit Ready failed", |
2082 | the_result); | |
e73aec82 | 2083 | } |
1da177e4 LT |
2084 | break; |
2085 | } | |
ef61329d | 2086 | |
1da177e4 LT |
2087 | /* |
2088 | * The device does not want the automatic start to be issued. | |
2089 | */ | |
33dd6f92 | 2090 | if (sdkp->device->no_start_on_add) |
1da177e4 | 2091 | break; |
1da177e4 | 2092 | |
33dd6f92 MW |
2093 | if (sense_valid && sshdr.sense_key == NOT_READY) { |
2094 | if (sshdr.asc == 4 && sshdr.ascq == 3) | |
2095 | break; /* manual intervention required */ | |
2096 | if (sshdr.asc == 4 && sshdr.ascq == 0xb) | |
2097 | break; /* standby */ | |
2098 | if (sshdr.asc == 4 && sshdr.ascq == 0xc) | |
2099 | break; /* unavailable */ | |
2100 | /* | |
2101 | * Issue command to spin up drive when not ready | |
2102 | */ | |
1da177e4 | 2103 | if (!spintime) { |
e73aec82 | 2104 | sd_printk(KERN_NOTICE, sdkp, "Spinning up disk..."); |
1da177e4 LT |
2105 | cmd[0] = START_STOP; |
2106 | cmd[1] = 1; /* Return immediately */ | |
2107 | memset((void *) &cmd[2], 0, 8); | |
2108 | cmd[4] = 1; /* Start spin cycle */ | |
d2886ea3 SR |
2109 | if (sdkp->device->start_stop_pwr_cond) |
2110 | cmd[4] |= 1 << 4; | |
ea73a9f2 JB |
2111 | scsi_execute_req(sdkp->device, cmd, DMA_NONE, |
2112 | NULL, 0, &sshdr, | |
f4f4e47e FT |
2113 | SD_TIMEOUT, SD_MAX_RETRIES, |
2114 | NULL); | |
4451e472 AS |
2115 | spintime_expire = jiffies + 100 * HZ; |
2116 | spintime = 1; | |
1da177e4 | 2117 | } |
1da177e4 LT |
2118 | /* Wait 1 second for next try */ |
2119 | msleep(1000); | |
2120 | printk("."); | |
4451e472 AS |
2121 | |
2122 | /* | |
2123 | * Wait for USB flash devices with slow firmware. | |
2124 | * Yes, this sense key/ASC combination shouldn't | |
2125 | * occur here. It's characteristic of these devices. | |
2126 | */ | |
2127 | } else if (sense_valid && | |
2128 | sshdr.sense_key == UNIT_ATTENTION && | |
2129 | sshdr.asc == 0x28) { | |
2130 | if (!spintime) { | |
2131 | spintime_expire = jiffies + 5 * HZ; | |
2132 | spintime = 1; | |
2133 | } | |
2134 | /* Wait 1 second for next try */ | |
2135 | msleep(1000); | |
1da177e4 LT |
2136 | } else { |
2137 | /* we don't understand the sense code, so it's | |
2138 | * probably pointless to loop */ | |
2139 | if(!spintime) { | |
e73aec82 MP |
2140 | sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n"); |
2141 | sd_print_sense_hdr(sdkp, &sshdr); | |
1da177e4 LT |
2142 | } |
2143 | break; | |
2144 | } | |
2145 | ||
4451e472 | 2146 | } while (spintime && time_before_eq(jiffies, spintime_expire)); |
1da177e4 LT |
2147 | |
2148 | if (spintime) { | |
2149 | if (scsi_status_is_good(the_result)) | |
2150 | printk("ready\n"); | |
2151 | else | |
2152 | printk("not responding...\n"); | |
2153 | } | |
2154 | } | |
2155 | ||
e0597d70 MP |
2156 | /* |
2157 | * Determine whether disk supports Data Integrity Field. | |
2158 | */ | |
fe542396 | 2159 | static int sd_read_protection_type(struct scsi_disk *sdkp, unsigned char *buffer) |
e0597d70 MP |
2160 | { |
2161 | struct scsi_device *sdp = sdkp->device; | |
2162 | u8 type; | |
fe542396 | 2163 | int ret = 0; |
e0597d70 MP |
2164 | |
2165 | if (scsi_device_protection(sdp) == 0 || (buffer[12] & 1) == 0) | |
fe542396 | 2166 | return ret; |
35e1a5d9 MP |
2167 | |
2168 | type = ((buffer[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */ | |
2169 | ||
8475c811 | 2170 | if (type > T10_PI_TYPE3_PROTECTION) |
fe542396 MP |
2171 | ret = -ENODEV; |
2172 | else if (scsi_host_dif_capable(sdp->host, type)) | |
2173 | ret = 1; | |
2174 | ||
2175 | if (sdkp->first_scan || type != sdkp->protection_type) | |
2176 | switch (ret) { | |
2177 | case -ENODEV: | |
2178 | sd_printk(KERN_ERR, sdkp, "formatted with unsupported" \ | |
2179 | " protection type %u. Disabling disk!\n", | |
2180 | type); | |
2181 | break; | |
2182 | case 1: | |
2183 | sd_printk(KERN_NOTICE, sdkp, | |
2184 | "Enabling DIF Type %u protection\n", type); | |
2185 | break; | |
2186 | case 0: | |
2187 | sd_printk(KERN_NOTICE, sdkp, | |
2188 | "Disabling DIF Type %u protection\n", type); | |
2189 | break; | |
2190 | } | |
e0597d70 | 2191 | |
be922f47 MP |
2192 | sdkp->protection_type = type; |
2193 | ||
fe542396 | 2194 | return ret; |
e0597d70 MP |
2195 | } |
2196 | ||
0da205e0 MW |
2197 | static void read_capacity_error(struct scsi_disk *sdkp, struct scsi_device *sdp, |
2198 | struct scsi_sense_hdr *sshdr, int sense_valid, | |
2199 | int the_result) | |
2200 | { | |
0da205e0 MW |
2201 | if (driver_byte(the_result) & DRIVER_SENSE) |
2202 | sd_print_sense_hdr(sdkp, sshdr); | |
2203 | else | |
2204 | sd_printk(KERN_NOTICE, sdkp, "Sense not available.\n"); | |
2205 | ||
2206 | /* | |
2207 | * Set dirty bit for removable devices if not ready - | |
2208 | * sometimes drives will not report this properly. | |
2209 | */ | |
2210 | if (sdp->removable && | |
2211 | sense_valid && sshdr->sense_key == NOT_READY) | |
2bae0093 | 2212 | set_media_not_present(sdkp); |
0da205e0 MW |
2213 | |
2214 | /* | |
2215 | * We used to set media_present to 0 here to indicate no media | |
2216 | * in the drive, but some drives fail read capacity even with | |
2217 | * media present, so we can't do that. | |
2218 | */ | |
2219 | sdkp->capacity = 0; /* unknown mapped to zero - as usual */ | |
2220 | } | |
2221 | ||
2222 | #define RC16_LEN 32 | |
2223 | #if RC16_LEN > SD_BUF_SIZE | |
2224 | #error RC16_LEN must not be more than SD_BUF_SIZE | |
2225 | #endif | |
2226 | ||
3233ac19 JB |
2227 | #define READ_CAPACITY_RETRIES_ON_RESET 10 |
2228 | ||
7c856152 MP |
2229 | /* |
2230 | * Ensure that we don't overflow sector_t when CONFIG_LBDAF is not set | |
2231 | * and the reported logical block size is bigger than 512 bytes. Note | |
2232 | * that last_sector is a u64 and therefore logical_to_sectors() is not | |
2233 | * applicable. | |
2234 | */ | |
2235 | static bool sd_addressable_capacity(u64 lba, unsigned int sector_size) | |
2236 | { | |
2237 | u64 last_sector = (lba + 1ULL) << (ilog2(sector_size) - 9); | |
2238 | ||
2239 | if (sizeof(sector_t) == 4 && last_sector > U32_MAX) | |
2240 | return false; | |
2241 | ||
2242 | return true; | |
2243 | } | |
2244 | ||
0da205e0 MW |
2245 | static int read_capacity_16(struct scsi_disk *sdkp, struct scsi_device *sdp, |
2246 | unsigned char *buffer) | |
ea73a9f2 | 2247 | { |
1da177e4 | 2248 | unsigned char cmd[16]; |
1da177e4 LT |
2249 | struct scsi_sense_hdr sshdr; |
2250 | int sense_valid = 0; | |
0da205e0 | 2251 | int the_result; |
3233ac19 | 2252 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
ea09bcc9 | 2253 | unsigned int alignment; |
0da205e0 MW |
2254 | unsigned long long lba; |
2255 | unsigned sector_size; | |
1da177e4 | 2256 | |
5ce524bd HG |
2257 | if (sdp->no_read_capacity_16) |
2258 | return -EINVAL; | |
2259 | ||
1da177e4 | 2260 | do { |
0da205e0 | 2261 | memset(cmd, 0, 16); |
eb846d9f | 2262 | cmd[0] = SERVICE_ACTION_IN_16; |
0da205e0 MW |
2263 | cmd[1] = SAI_READ_CAPACITY_16; |
2264 | cmd[13] = RC16_LEN; | |
2265 | memset(buffer, 0, RC16_LEN); | |
2266 | ||
ea73a9f2 | 2267 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, |
0da205e0 MW |
2268 | buffer, RC16_LEN, &sshdr, |
2269 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
1da177e4 | 2270 | |
ea73a9f2 | 2271 | if (media_not_present(sdkp, &sshdr)) |
0da205e0 | 2272 | return -ENODEV; |
1da177e4 | 2273 | |
2b301307 | 2274 | if (the_result) { |
ea73a9f2 | 2275 | sense_valid = scsi_sense_valid(&sshdr); |
2b301307 MW |
2276 | if (sense_valid && |
2277 | sshdr.sense_key == ILLEGAL_REQUEST && | |
2278 | (sshdr.asc == 0x20 || sshdr.asc == 0x24) && | |
2279 | sshdr.ascq == 0x00) | |
2280 | /* Invalid Command Operation Code or | |
2281 | * Invalid Field in CDB, just retry | |
2282 | * silently with RC10 */ | |
2283 | return -EINVAL; | |
3233ac19 JB |
2284 | if (sense_valid && |
2285 | sshdr.sense_key == UNIT_ATTENTION && | |
2286 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) | |
2287 | /* Device reset might occur several times, | |
2288 | * give it one more chance */ | |
2289 | if (--reset_retries > 0) | |
2290 | continue; | |
2b301307 | 2291 | } |
1da177e4 LT |
2292 | retries--; |
2293 | ||
2294 | } while (the_result && retries); | |
2295 | ||
0da205e0 | 2296 | if (the_result) { |
ef61329d | 2297 | sd_print_result(sdkp, "Read Capacity(16) failed", the_result); |
0da205e0 MW |
2298 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); |
2299 | return -EINVAL; | |
2300 | } | |
e73aec82 | 2301 | |
8f76d151 DH |
2302 | sector_size = get_unaligned_be32(&buffer[8]); |
2303 | lba = get_unaligned_be64(&buffer[0]); | |
0da205e0 | 2304 | |
fe542396 MP |
2305 | if (sd_read_protection_type(sdkp, buffer) < 0) { |
2306 | sdkp->capacity = 0; | |
2307 | return -ENODEV; | |
2308 | } | |
0da205e0 | 2309 | |
7c856152 | 2310 | if (!sd_addressable_capacity(lba, sector_size)) { |
0da205e0 MW |
2311 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a " |
2312 | "kernel compiled with support for large block " | |
2313 | "devices.\n"); | |
2314 | sdkp->capacity = 0; | |
2315 | return -EOVERFLOW; | |
2316 | } | |
2317 | ||
ea09bcc9 | 2318 | /* Logical blocks per physical block exponent */ |
526f7c79 | 2319 | sdkp->physical_block_size = (1 << (buffer[13] & 0xf)) * sector_size; |
ea09bcc9 | 2320 | |
89d94756 HR |
2321 | /* RC basis */ |
2322 | sdkp->rc_basis = (buffer[12] >> 4) & 0x3; | |
2323 | ||
ea09bcc9 MP |
2324 | /* Lowest aligned logical block */ |
2325 | alignment = ((buffer[14] & 0x3f) << 8 | buffer[15]) * sector_size; | |
2326 | blk_queue_alignment_offset(sdp->request_queue, alignment); | |
2327 | if (alignment && sdkp->first_scan) | |
2328 | sd_printk(KERN_NOTICE, sdkp, | |
2329 | "physical block alignment offset: %u\n", alignment); | |
2330 | ||
c98a0eb0 MP |
2331 | if (buffer[14] & 0x80) { /* LBPME */ |
2332 | sdkp->lbpme = 1; | |
e339c1a7 | 2333 | |
c98a0eb0 MP |
2334 | if (buffer[14] & 0x40) /* LBPRZ */ |
2335 | sdkp->lbprz = 1; | |
e339c1a7 | 2336 | |
c98a0eb0 | 2337 | sd_config_discard(sdkp, SD_LBP_WS16); |
e339c1a7 MP |
2338 | } |
2339 | ||
0da205e0 MW |
2340 | sdkp->capacity = lba + 1; |
2341 | return sector_size; | |
2342 | } | |
2343 | ||
2344 | static int read_capacity_10(struct scsi_disk *sdkp, struct scsi_device *sdp, | |
2345 | unsigned char *buffer) | |
2346 | { | |
2347 | unsigned char cmd[16]; | |
2348 | struct scsi_sense_hdr sshdr; | |
2349 | int sense_valid = 0; | |
2350 | int the_result; | |
3233ac19 | 2351 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
0da205e0 MW |
2352 | sector_t lba; |
2353 | unsigned sector_size; | |
2354 | ||
2355 | do { | |
2356 | cmd[0] = READ_CAPACITY; | |
2357 | memset(&cmd[1], 0, 9); | |
2358 | memset(buffer, 0, 8); | |
2359 | ||
2360 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, | |
2361 | buffer, 8, &sshdr, | |
2362 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
2363 | ||
2364 | if (media_not_present(sdkp, &sshdr)) | |
2365 | return -ENODEV; | |
2366 | ||
3233ac19 | 2367 | if (the_result) { |
0da205e0 | 2368 | sense_valid = scsi_sense_valid(&sshdr); |
3233ac19 JB |
2369 | if (sense_valid && |
2370 | sshdr.sense_key == UNIT_ATTENTION && | |
2371 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) | |
2372 | /* Device reset might occur several times, | |
2373 | * give it one more chance */ | |
2374 | if (--reset_retries > 0) | |
2375 | continue; | |
2376 | } | |
0da205e0 MW |
2377 | retries--; |
2378 | ||
2379 | } while (the_result && retries); | |
2380 | ||
2381 | if (the_result) { | |
ef61329d | 2382 | sd_print_result(sdkp, "Read Capacity(10) failed", the_result); |
0da205e0 MW |
2383 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); |
2384 | return -EINVAL; | |
2385 | } | |
2386 | ||
8f76d151 DH |
2387 | sector_size = get_unaligned_be32(&buffer[4]); |
2388 | lba = get_unaligned_be32(&buffer[0]); | |
0da205e0 | 2389 | |
5ce524bd HG |
2390 | if (sdp->no_read_capacity_16 && (lba == 0xffffffff)) { |
2391 | /* Some buggy (usb cardreader) devices return an lba of | |
2392 | 0xffffffff when the want to report a size of 0 (with | |
2393 | which they really mean no media is present) */ | |
2394 | sdkp->capacity = 0; | |
5cc10350 | 2395 | sdkp->physical_block_size = sector_size; |
5ce524bd HG |
2396 | return sector_size; |
2397 | } | |
2398 | ||
7c856152 | 2399 | if (!sd_addressable_capacity(lba, sector_size)) { |
0da205e0 MW |
2400 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a " |
2401 | "kernel compiled with support for large block " | |
2402 | "devices.\n"); | |
2403 | sdkp->capacity = 0; | |
2404 | return -EOVERFLOW; | |
2405 | } | |
2406 | ||
2407 | sdkp->capacity = lba + 1; | |
526f7c79 | 2408 | sdkp->physical_block_size = sector_size; |
0da205e0 MW |
2409 | return sector_size; |
2410 | } | |
2411 | ||
2b301307 MW |
2412 | static int sd_try_rc16_first(struct scsi_device *sdp) |
2413 | { | |
f87146bb HR |
2414 | if (sdp->host->max_cmd_len < 16) |
2415 | return 0; | |
6a0bdffa AS |
2416 | if (sdp->try_rc_10_first) |
2417 | return 0; | |
2b301307 MW |
2418 | if (sdp->scsi_level > SCSI_SPC_2) |
2419 | return 1; | |
2420 | if (scsi_device_protection(sdp)) | |
2421 | return 1; | |
2422 | return 0; | |
2423 | } | |
2424 | ||
0da205e0 MW |
2425 | /* |
2426 | * read disk capacity | |
2427 | */ | |
2428 | static void | |
2429 | sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer) | |
2430 | { | |
2431 | int sector_size; | |
2432 | struct scsi_device *sdp = sdkp->device; | |
2433 | ||
2b301307 | 2434 | if (sd_try_rc16_first(sdp)) { |
0da205e0 MW |
2435 | sector_size = read_capacity_16(sdkp, sdp, buffer); |
2436 | if (sector_size == -EOVERFLOW) | |
1da177e4 | 2437 | goto got_data; |
2b301307 MW |
2438 | if (sector_size == -ENODEV) |
2439 | return; | |
2440 | if (sector_size < 0) | |
2441 | sector_size = read_capacity_10(sdkp, sdp, buffer); | |
0da205e0 MW |
2442 | if (sector_size < 0) |
2443 | return; | |
1da177e4 | 2444 | } else { |
0da205e0 MW |
2445 | sector_size = read_capacity_10(sdkp, sdp, buffer); |
2446 | if (sector_size == -EOVERFLOW) | |
2447 | goto got_data; | |
2448 | if (sector_size < 0) | |
2449 | return; | |
2450 | if ((sizeof(sdkp->capacity) > 4) && | |
2451 | (sdkp->capacity > 0xffffffffULL)) { | |
2452 | int old_sector_size = sector_size; | |
2453 | sd_printk(KERN_NOTICE, sdkp, "Very big device. " | |
2454 | "Trying to use READ CAPACITY(16).\n"); | |
2455 | sector_size = read_capacity_16(sdkp, sdp, buffer); | |
2456 | if (sector_size < 0) { | |
2457 | sd_printk(KERN_NOTICE, sdkp, | |
2458 | "Using 0xffffffff as device size\n"); | |
2459 | sdkp->capacity = 1 + (sector_t) 0xffffffff; | |
2460 | sector_size = old_sector_size; | |
2461 | goto got_data; | |
2462 | } | |
2463 | } | |
2464 | } | |
1da177e4 | 2465 | |
5c211caa AS |
2466 | /* Some devices are known to return the total number of blocks, |
2467 | * not the highest block number. Some devices have versions | |
2468 | * which do this and others which do not. Some devices we might | |
2469 | * suspect of doing this but we don't know for certain. | |
2470 | * | |
2471 | * If we know the reported capacity is wrong, decrement it. If | |
2472 | * we can only guess, then assume the number of blocks is even | |
2473 | * (usually true but not always) and err on the side of lowering | |
2474 | * the capacity. | |
2475 | */ | |
2476 | if (sdp->fix_capacity || | |
2477 | (sdp->guess_capacity && (sdkp->capacity & 0x01))) { | |
2478 | sd_printk(KERN_INFO, sdkp, "Adjusting the sector count " | |
2479 | "from its reported value: %llu\n", | |
2480 | (unsigned long long) sdkp->capacity); | |
1da177e4 | 2481 | --sdkp->capacity; |
61bf54b7 ON |
2482 | } |
2483 | ||
1da177e4 LT |
2484 | got_data: |
2485 | if (sector_size == 0) { | |
2486 | sector_size = 512; | |
e73aec82 MP |
2487 | sd_printk(KERN_NOTICE, sdkp, "Sector size 0 reported, " |
2488 | "assuming 512.\n"); | |
1da177e4 LT |
2489 | } |
2490 | ||
2491 | if (sector_size != 512 && | |
2492 | sector_size != 1024 && | |
2493 | sector_size != 2048 && | |
74856fbf | 2494 | sector_size != 4096) { |
e73aec82 MP |
2495 | sd_printk(KERN_NOTICE, sdkp, "Unsupported sector size %d.\n", |
2496 | sector_size); | |
1da177e4 LT |
2497 | /* |
2498 | * The user might want to re-format the drive with | |
2499 | * a supported sectorsize. Once this happens, it | |
2500 | * would be relatively trivial to set the thing up. | |
2501 | * For this reason, we leave the thing in the table. | |
2502 | */ | |
2503 | sdkp->capacity = 0; | |
2504 | /* | |
2505 | * set a bogus sector size so the normal read/write | |
2506 | * logic in the block layer will eventually refuse any | |
2507 | * request on this device without tripping over power | |
2508 | * of two sector size assumptions | |
2509 | */ | |
2510 | sector_size = 512; | |
2511 | } | |
e1defc4f | 2512 | blk_queue_logical_block_size(sdp->request_queue, sector_size); |
89d94756 HR |
2513 | blk_queue_physical_block_size(sdp->request_queue, |
2514 | sdkp->physical_block_size); | |
2515 | sdkp->device->sector_size = sector_size; | |
7404ad3b | 2516 | |
89d94756 HR |
2517 | if (sdkp->capacity > 0xffffffff) |
2518 | sdp->use_16_for_rw = 1; | |
1da177e4 | 2519 | |
89d94756 | 2520 | } |
1da177e4 | 2521 | |
89d94756 HR |
2522 | /* |
2523 | * Print disk capacity | |
2524 | */ | |
2525 | static void | |
2526 | sd_print_capacity(struct scsi_disk *sdkp, | |
2527 | sector_t old_capacity) | |
2528 | { | |
2529 | int sector_size = sdkp->device->sector_size; | |
2530 | char cap_str_2[10], cap_str_10[10]; | |
ea09bcc9 | 2531 | |
89d94756 HR |
2532 | string_get_size(sdkp->capacity, sector_size, |
2533 | STRING_UNITS_2, cap_str_2, sizeof(cap_str_2)); | |
2534 | string_get_size(sdkp->capacity, sector_size, | |
2535 | STRING_UNITS_10, cap_str_10, | |
2536 | sizeof(cap_str_10)); | |
1da177e4 | 2537 | |
89d94756 HR |
2538 | if (sdkp->first_scan || old_capacity != sdkp->capacity) { |
2539 | sd_printk(KERN_NOTICE, sdkp, | |
2540 | "%llu %d-byte logical blocks: (%s/%s)\n", | |
2541 | (unsigned long long)sdkp->capacity, | |
2542 | sector_size, cap_str_10, cap_str_2); | |
53ad570b | 2543 | |
89d94756 HR |
2544 | if (sdkp->physical_block_size != sector_size) |
2545 | sd_printk(KERN_NOTICE, sdkp, | |
2546 | "%u-byte physical blocks\n", | |
2547 | sdkp->physical_block_size); | |
2548 | ||
2549 | sd_zbc_print_zones(sdkp); | |
2550 | } | |
1da177e4 LT |
2551 | } |
2552 | ||
2553 | /* called with buffer of length 512 */ | |
2554 | static inline int | |
ea73a9f2 JB |
2555 | sd_do_mode_sense(struct scsi_device *sdp, int dbd, int modepage, |
2556 | unsigned char *buffer, int len, struct scsi_mode_data *data, | |
2557 | struct scsi_sense_hdr *sshdr) | |
1da177e4 | 2558 | { |
ea73a9f2 | 2559 | return scsi_mode_sense(sdp, dbd, modepage, buffer, len, |
1cf72699 | 2560 | SD_TIMEOUT, SD_MAX_RETRIES, data, |
ea73a9f2 | 2561 | sshdr); |
1da177e4 LT |
2562 | } |
2563 | ||
2564 | /* | |
2565 | * read write protect setting, if possible - called only in sd_revalidate_disk() | |
48970800 | 2566 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
2567 | */ |
2568 | static void | |
e73aec82 | 2569 | sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer) |
ea73a9f2 | 2570 | { |
1da177e4 | 2571 | int res; |
ea73a9f2 | 2572 | struct scsi_device *sdp = sdkp->device; |
1da177e4 | 2573 | struct scsi_mode_data data; |
70a9b873 | 2574 | int old_wp = sdkp->write_prot; |
1da177e4 LT |
2575 | |
2576 | set_disk_ro(sdkp->disk, 0); | |
ea73a9f2 | 2577 | if (sdp->skip_ms_page_3f) { |
b2bff6ce | 2578 | sd_first_printk(KERN_NOTICE, sdkp, "Assuming Write Enabled\n"); |
1da177e4 LT |
2579 | return; |
2580 | } | |
2581 | ||
ea73a9f2 JB |
2582 | if (sdp->use_192_bytes_for_3f) { |
2583 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 192, &data, NULL); | |
1da177e4 LT |
2584 | } else { |
2585 | /* | |
2586 | * First attempt: ask for all pages (0x3F), but only 4 bytes. | |
2587 | * We have to start carefully: some devices hang if we ask | |
2588 | * for more than is available. | |
2589 | */ | |
ea73a9f2 | 2590 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 4, &data, NULL); |
1da177e4 LT |
2591 | |
2592 | /* | |
2593 | * Second attempt: ask for page 0 When only page 0 is | |
2594 | * implemented, a request for page 3F may return Sense Key | |
2595 | * 5: Illegal Request, Sense Code 24: Invalid field in | |
2596 | * CDB. | |
2597 | */ | |
2598 | if (!scsi_status_is_good(res)) | |
ea73a9f2 | 2599 | res = sd_do_mode_sense(sdp, 0, 0, buffer, 4, &data, NULL); |
1da177e4 LT |
2600 | |
2601 | /* | |
2602 | * Third attempt: ask 255 bytes, as we did earlier. | |
2603 | */ | |
2604 | if (!scsi_status_is_good(res)) | |
ea73a9f2 JB |
2605 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 255, |
2606 | &data, NULL); | |
1da177e4 LT |
2607 | } |
2608 | ||
2609 | if (!scsi_status_is_good(res)) { | |
b2bff6ce | 2610 | sd_first_printk(KERN_WARNING, sdkp, |
e73aec82 | 2611 | "Test WP failed, assume Write Enabled\n"); |
1da177e4 LT |
2612 | } else { |
2613 | sdkp->write_prot = ((data.device_specific & 0x80) != 0); | |
2614 | set_disk_ro(sdkp->disk, sdkp->write_prot); | |
70a9b873 MP |
2615 | if (sdkp->first_scan || old_wp != sdkp->write_prot) { |
2616 | sd_printk(KERN_NOTICE, sdkp, "Write Protect is %s\n", | |
2617 | sdkp->write_prot ? "on" : "off"); | |
df441cc0 | 2618 | sd_printk(KERN_DEBUG, sdkp, "Mode Sense: %4ph\n", buffer); |
70a9b873 | 2619 | } |
1da177e4 LT |
2620 | } |
2621 | } | |
2622 | ||
2623 | /* | |
2624 | * sd_read_cache_type - called only from sd_revalidate_disk() | |
48970800 | 2625 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
2626 | */ |
2627 | static void | |
e73aec82 | 2628 | sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer) |
631e8a13 | 2629 | { |
1da177e4 | 2630 | int len = 0, res; |
ea73a9f2 | 2631 | struct scsi_device *sdp = sdkp->device; |
1da177e4 | 2632 | |
631e8a13 AV |
2633 | int dbd; |
2634 | int modepage; | |
0bcaa111 | 2635 | int first_len; |
1da177e4 LT |
2636 | struct scsi_mode_data data; |
2637 | struct scsi_sense_hdr sshdr; | |
70a9b873 MP |
2638 | int old_wce = sdkp->WCE; |
2639 | int old_rcd = sdkp->RCD; | |
2640 | int old_dpofua = sdkp->DPOFUA; | |
1da177e4 | 2641 | |
39c60a09 JB |
2642 | |
2643 | if (sdkp->cache_override) | |
2644 | return; | |
2645 | ||
0bcaa111 LT |
2646 | first_len = 4; |
2647 | if (sdp->skip_ms_page_8) { | |
2648 | if (sdp->type == TYPE_RBC) | |
2649 | goto defaults; | |
2650 | else { | |
2651 | if (sdp->skip_ms_page_3f) | |
2652 | goto defaults; | |
2653 | modepage = 0x3F; | |
2654 | if (sdp->use_192_bytes_for_3f) | |
2655 | first_len = 192; | |
2656 | dbd = 0; | |
2657 | } | |
2658 | } else if (sdp->type == TYPE_RBC) { | |
631e8a13 AV |
2659 | modepage = 6; |
2660 | dbd = 8; | |
2661 | } else { | |
2662 | modepage = 8; | |
2663 | dbd = 0; | |
2664 | } | |
2665 | ||
1da177e4 | 2666 | /* cautiously ask */ |
0bcaa111 LT |
2667 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, first_len, |
2668 | &data, &sshdr); | |
1da177e4 LT |
2669 | |
2670 | if (!scsi_status_is_good(res)) | |
2671 | goto bad_sense; | |
2672 | ||
6d73c851 AV |
2673 | if (!data.header_length) { |
2674 | modepage = 6; | |
0bcaa111 | 2675 | first_len = 0; |
b2bff6ce MP |
2676 | sd_first_printk(KERN_ERR, sdkp, |
2677 | "Missing header in MODE_SENSE response\n"); | |
6d73c851 AV |
2678 | } |
2679 | ||
1da177e4 LT |
2680 | /* that went OK, now ask for the proper length */ |
2681 | len = data.length; | |
2682 | ||
2683 | /* | |
2684 | * We're only interested in the first three bytes, actually. | |
2685 | * But the data cache page is defined for the first 20. | |
2686 | */ | |
2687 | if (len < 3) | |
2688 | goto bad_sense; | |
0bcaa111 | 2689 | else if (len > SD_BUF_SIZE) { |
b2bff6ce | 2690 | sd_first_printk(KERN_NOTICE, sdkp, "Truncating mode parameter " |
0bcaa111 LT |
2691 | "data from %d to %d bytes\n", len, SD_BUF_SIZE); |
2692 | len = SD_BUF_SIZE; | |
2693 | } | |
2694 | if (modepage == 0x3F && sdp->use_192_bytes_for_3f) | |
2695 | len = 192; | |
1da177e4 LT |
2696 | |
2697 | /* Get the data */ | |
0bcaa111 LT |
2698 | if (len > first_len) |
2699 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, len, | |
2700 | &data, &sshdr); | |
1da177e4 LT |
2701 | |
2702 | if (scsi_status_is_good(res)) { | |
631e8a13 | 2703 | int offset = data.header_length + data.block_descriptor_length; |
1da177e4 | 2704 | |
0bcaa111 LT |
2705 | while (offset < len) { |
2706 | u8 page_code = buffer[offset] & 0x3F; | |
2707 | u8 spf = buffer[offset] & 0x40; | |
2708 | ||
2709 | if (page_code == 8 || page_code == 6) { | |
2710 | /* We're interested only in the first 3 bytes. | |
2711 | */ | |
2712 | if (len - offset <= 2) { | |
b2bff6ce MP |
2713 | sd_first_printk(KERN_ERR, sdkp, |
2714 | "Incomplete mode parameter " | |
2715 | "data\n"); | |
0bcaa111 LT |
2716 | goto defaults; |
2717 | } else { | |
2718 | modepage = page_code; | |
2719 | goto Page_found; | |
2720 | } | |
2721 | } else { | |
2722 | /* Go to the next page */ | |
2723 | if (spf && len - offset > 3) | |
2724 | offset += 4 + (buffer[offset+2] << 8) + | |
2725 | buffer[offset+3]; | |
2726 | else if (!spf && len - offset > 1) | |
2727 | offset += 2 + buffer[offset+1]; | |
2728 | else { | |
b2bff6ce MP |
2729 | sd_first_printk(KERN_ERR, sdkp, |
2730 | "Incomplete mode " | |
2731 | "parameter data\n"); | |
0bcaa111 LT |
2732 | goto defaults; |
2733 | } | |
2734 | } | |
48970800 AV |
2735 | } |
2736 | ||
b2bff6ce | 2737 | sd_first_printk(KERN_ERR, sdkp, "No Caching mode page found\n"); |
984f1733 AS |
2738 | goto defaults; |
2739 | ||
0bcaa111 | 2740 | Page_found: |
631e8a13 AV |
2741 | if (modepage == 8) { |
2742 | sdkp->WCE = ((buffer[offset + 2] & 0x04) != 0); | |
2743 | sdkp->RCD = ((buffer[offset + 2] & 0x01) != 0); | |
2744 | } else { | |
2745 | sdkp->WCE = ((buffer[offset + 2] & 0x01) == 0); | |
2746 | sdkp->RCD = 0; | |
2747 | } | |
1da177e4 | 2748 | |
007365ad | 2749 | sdkp->DPOFUA = (data.device_specific & 0x10) != 0; |
b14bf2d0 AS |
2750 | if (sdp->broken_fua) { |
2751 | sd_first_printk(KERN_NOTICE, sdkp, "Disabling FUA\n"); | |
2752 | sdkp->DPOFUA = 0; | |
26f28197 DLM |
2753 | } else if (sdkp->DPOFUA && !sdkp->device->use_10_for_rw && |
2754 | !sdkp->device->use_16_for_rw) { | |
b2bff6ce | 2755 | sd_first_printk(KERN_NOTICE, sdkp, |
e73aec82 | 2756 | "Uses READ/WRITE(6), disabling FUA\n"); |
007365ad TH |
2757 | sdkp->DPOFUA = 0; |
2758 | } | |
2759 | ||
2eefd57b SRT |
2760 | /* No cache flush allowed for write protected devices */ |
2761 | if (sdkp->WCE && sdkp->write_prot) | |
2762 | sdkp->WCE = 0; | |
2763 | ||
70a9b873 MP |
2764 | if (sdkp->first_scan || old_wce != sdkp->WCE || |
2765 | old_rcd != sdkp->RCD || old_dpofua != sdkp->DPOFUA) | |
2766 | sd_printk(KERN_NOTICE, sdkp, | |
2767 | "Write cache: %s, read cache: %s, %s\n", | |
2768 | sdkp->WCE ? "enabled" : "disabled", | |
2769 | sdkp->RCD ? "disabled" : "enabled", | |
2770 | sdkp->DPOFUA ? "supports DPO and FUA" | |
2771 | : "doesn't support DPO or FUA"); | |
1da177e4 LT |
2772 | |
2773 | return; | |
2774 | } | |
2775 | ||
2776 | bad_sense: | |
ea73a9f2 | 2777 | if (scsi_sense_valid(&sshdr) && |
1da177e4 LT |
2778 | sshdr.sense_key == ILLEGAL_REQUEST && |
2779 | sshdr.asc == 0x24 && sshdr.ascq == 0x0) | |
e73aec82 | 2780 | /* Invalid field in CDB */ |
b2bff6ce | 2781 | sd_first_printk(KERN_NOTICE, sdkp, "Cache data unavailable\n"); |
1da177e4 | 2782 | else |
b2bff6ce MP |
2783 | sd_first_printk(KERN_ERR, sdkp, |
2784 | "Asking for cache data failed\n"); | |
1da177e4 LT |
2785 | |
2786 | defaults: | |
b81478d8 | 2787 | if (sdp->wce_default_on) { |
b2bff6ce MP |
2788 | sd_first_printk(KERN_NOTICE, sdkp, |
2789 | "Assuming drive cache: write back\n"); | |
b81478d8 NJ |
2790 | sdkp->WCE = 1; |
2791 | } else { | |
b2bff6ce MP |
2792 | sd_first_printk(KERN_ERR, sdkp, |
2793 | "Assuming drive cache: write through\n"); | |
b81478d8 NJ |
2794 | sdkp->WCE = 0; |
2795 | } | |
1da177e4 | 2796 | sdkp->RCD = 0; |
48970800 | 2797 | sdkp->DPOFUA = 0; |
1da177e4 LT |
2798 | } |
2799 | ||
e0597d70 MP |
2800 | /* |
2801 | * The ATO bit indicates whether the DIF application tag is available | |
2802 | * for use by the operating system. | |
2803 | */ | |
439d77f7 | 2804 | static void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer) |
e0597d70 MP |
2805 | { |
2806 | int res, offset; | |
2807 | struct scsi_device *sdp = sdkp->device; | |
2808 | struct scsi_mode_data data; | |
2809 | struct scsi_sense_hdr sshdr; | |
2810 | ||
89d94756 | 2811 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) |
e0597d70 MP |
2812 | return; |
2813 | ||
2814 | if (sdkp->protection_type == 0) | |
2815 | return; | |
2816 | ||
2817 | res = scsi_mode_sense(sdp, 1, 0x0a, buffer, 36, SD_TIMEOUT, | |
2818 | SD_MAX_RETRIES, &data, &sshdr); | |
2819 | ||
2820 | if (!scsi_status_is_good(res) || !data.header_length || | |
2821 | data.length < 6) { | |
b2bff6ce | 2822 | sd_first_printk(KERN_WARNING, sdkp, |
e0597d70 MP |
2823 | "getting Control mode page failed, assume no ATO\n"); |
2824 | ||
2825 | if (scsi_sense_valid(&sshdr)) | |
2826 | sd_print_sense_hdr(sdkp, &sshdr); | |
2827 | ||
2828 | return; | |
2829 | } | |
2830 | ||
2831 | offset = data.header_length + data.block_descriptor_length; | |
2832 | ||
2833 | if ((buffer[offset] & 0x3f) != 0x0a) { | |
b2bff6ce | 2834 | sd_first_printk(KERN_ERR, sdkp, "ATO Got wrong page\n"); |
e0597d70 MP |
2835 | return; |
2836 | } | |
2837 | ||
2838 | if ((buffer[offset + 5] & 0x80) == 0) | |
2839 | return; | |
2840 | ||
2841 | sdkp->ATO = 1; | |
2842 | ||
2843 | return; | |
2844 | } | |
2845 | ||
d11b6916 MP |
2846 | /** |
2847 | * sd_read_block_limits - Query disk device for preferred I/O sizes. | |
7529fbb0 | 2848 | * @sdkp: disk to query |
d11b6916 MP |
2849 | */ |
2850 | static void sd_read_block_limits(struct scsi_disk *sdkp) | |
2851 | { | |
2852 | unsigned int sector_sz = sdkp->device->sector_size; | |
bb2d3de1 | 2853 | const int vpd_len = 64; |
e3deec09 | 2854 | unsigned char *buffer = kmalloc(vpd_len, GFP_KERNEL); |
d11b6916 | 2855 | |
e3deec09 JB |
2856 | if (!buffer || |
2857 | /* Block Limits VPD */ | |
2858 | scsi_get_vpd_page(sdkp->device, 0xb0, buffer, vpd_len)) | |
2859 | goto out; | |
d11b6916 MP |
2860 | |
2861 | blk_queue_io_min(sdkp->disk->queue, | |
2862 | get_unaligned_be16(&buffer[6]) * sector_sz); | |
ca369d51 MP |
2863 | |
2864 | sdkp->max_xfer_blocks = get_unaligned_be32(&buffer[8]); | |
2865 | sdkp->opt_xfer_blocks = get_unaligned_be32(&buffer[12]); | |
d11b6916 | 2866 | |
c98a0eb0 MP |
2867 | if (buffer[3] == 0x3c) { |
2868 | unsigned int lba_count, desc_count; | |
e339c1a7 | 2869 | |
5db44863 | 2870 | sdkp->max_ws_blocks = (u32)get_unaligned_be64(&buffer[36]); |
e339c1a7 | 2871 | |
c98a0eb0 | 2872 | if (!sdkp->lbpme) |
045d3fe7 | 2873 | goto out; |
045d3fe7 | 2874 | |
c98a0eb0 MP |
2875 | lba_count = get_unaligned_be32(&buffer[20]); |
2876 | desc_count = get_unaligned_be32(&buffer[24]); | |
045d3fe7 | 2877 | |
c98a0eb0 MP |
2878 | if (lba_count && desc_count) |
2879 | sdkp->max_unmap_blocks = lba_count; | |
e339c1a7 | 2880 | |
c98a0eb0 | 2881 | sdkp->unmap_granularity = get_unaligned_be32(&buffer[28]); |
e339c1a7 MP |
2882 | |
2883 | if (buffer[32] & 0x80) | |
c98a0eb0 | 2884 | sdkp->unmap_alignment = |
e339c1a7 | 2885 | get_unaligned_be32(&buffer[32]) & ~(1 << 31); |
c98a0eb0 MP |
2886 | |
2887 | if (!sdkp->lbpvpd) { /* LBP VPD page not provided */ | |
2888 | ||
2889 | if (sdkp->max_unmap_blocks) | |
2890 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
2891 | else | |
2892 | sd_config_discard(sdkp, SD_LBP_WS16); | |
2893 | ||
2894 | } else { /* LBP VPD page tells us what to use */ | |
bcd069bb | 2895 | if (sdkp->lbpu && sdkp->max_unmap_blocks) |
e461338b MP |
2896 | sd_config_discard(sdkp, SD_LBP_UNMAP); |
2897 | else if (sdkp->lbpws) | |
c98a0eb0 MP |
2898 | sd_config_discard(sdkp, SD_LBP_WS16); |
2899 | else if (sdkp->lbpws10) | |
2900 | sd_config_discard(sdkp, SD_LBP_WS10); | |
7985090a MP |
2901 | else if (sdkp->lbpu && sdkp->max_unmap_blocks) |
2902 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
c98a0eb0 MP |
2903 | else |
2904 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
2905 | } | |
e339c1a7 MP |
2906 | } |
2907 | ||
e3deec09 | 2908 | out: |
d11b6916 MP |
2909 | kfree(buffer); |
2910 | } | |
2911 | ||
3821d768 MP |
2912 | /** |
2913 | * sd_read_block_characteristics - Query block dev. characteristics | |
7529fbb0 | 2914 | * @sdkp: disk to query |
3821d768 MP |
2915 | */ |
2916 | static void sd_read_block_characteristics(struct scsi_disk *sdkp) | |
2917 | { | |
89d94756 | 2918 | struct request_queue *q = sdkp->disk->queue; |
e3deec09 | 2919 | unsigned char *buffer; |
3821d768 | 2920 | u16 rot; |
bb2d3de1 | 2921 | const int vpd_len = 64; |
3821d768 | 2922 | |
e3deec09 | 2923 | buffer = kmalloc(vpd_len, GFP_KERNEL); |
3821d768 | 2924 | |
e3deec09 JB |
2925 | if (!buffer || |
2926 | /* Block Device Characteristics VPD */ | |
2927 | scsi_get_vpd_page(sdkp->device, 0xb1, buffer, vpd_len)) | |
2928 | goto out; | |
3821d768 MP |
2929 | |
2930 | rot = get_unaligned_be16(&buffer[4]); | |
2931 | ||
b277da0a | 2932 | if (rot == 1) { |
89d94756 HR |
2933 | queue_flag_set_unlocked(QUEUE_FLAG_NONROT, q); |
2934 | queue_flag_clear_unlocked(QUEUE_FLAG_ADD_RANDOM, q); | |
b277da0a | 2935 | } |
3821d768 | 2936 | |
68af412c DLM |
2937 | if (sdkp->device->type == TYPE_ZBC) { |
2938 | /* Host-managed */ | |
89d94756 | 2939 | q->limits.zoned = BLK_ZONED_HM; |
68af412c DLM |
2940 | } else { |
2941 | sdkp->zoned = (buffer[8] >> 4) & 3; | |
2942 | if (sdkp->zoned == 1) | |
2943 | /* Host-aware */ | |
2944 | q->limits.zoned = BLK_ZONED_HA; | |
2945 | else | |
2946 | /* | |
2947 | * Treat drive-managed devices as | |
2948 | * regular block devices. | |
2949 | */ | |
2950 | q->limits.zoned = BLK_ZONED_NONE; | |
2951 | } | |
89d94756 HR |
2952 | if (blk_queue_is_zoned(q) && sdkp->first_scan) |
2953 | sd_printk(KERN_NOTICE, sdkp, "Host-%s zoned block device\n", | |
2954 | q->limits.zoned == BLK_ZONED_HM ? "managed" : "aware"); | |
2955 | ||
e3deec09 | 2956 | out: |
3821d768 MP |
2957 | kfree(buffer); |
2958 | } | |
2959 | ||
045d3fe7 | 2960 | /** |
c98a0eb0 | 2961 | * sd_read_block_provisioning - Query provisioning VPD page |
7529fbb0 | 2962 | * @sdkp: disk to query |
045d3fe7 | 2963 | */ |
c98a0eb0 | 2964 | static void sd_read_block_provisioning(struct scsi_disk *sdkp) |
045d3fe7 MP |
2965 | { |
2966 | unsigned char *buffer; | |
2967 | const int vpd_len = 8; | |
2968 | ||
c98a0eb0 | 2969 | if (sdkp->lbpme == 0) |
045d3fe7 MP |
2970 | return; |
2971 | ||
2972 | buffer = kmalloc(vpd_len, GFP_KERNEL); | |
2973 | ||
2974 | if (!buffer || scsi_get_vpd_page(sdkp->device, 0xb2, buffer, vpd_len)) | |
2975 | goto out; | |
2976 | ||
c98a0eb0 MP |
2977 | sdkp->lbpvpd = 1; |
2978 | sdkp->lbpu = (buffer[5] >> 7) & 1; /* UNMAP */ | |
2979 | sdkp->lbpws = (buffer[5] >> 6) & 1; /* WRITE SAME(16) with UNMAP */ | |
2980 | sdkp->lbpws10 = (buffer[5] >> 5) & 1; /* WRITE SAME(10) with UNMAP */ | |
045d3fe7 MP |
2981 | |
2982 | out: | |
2983 | kfree(buffer); | |
2984 | } | |
2985 | ||
5db44863 MP |
2986 | static void sd_read_write_same(struct scsi_disk *sdkp, unsigned char *buffer) |
2987 | { | |
66c28f97 MP |
2988 | struct scsi_device *sdev = sdkp->device; |
2989 | ||
54b2b50c MP |
2990 | if (sdev->host->no_write_same) { |
2991 | sdev->no_write_same = 1; | |
2992 | ||
2993 | return; | |
2994 | } | |
2995 | ||
66c28f97 | 2996 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, INQUIRY) < 0) { |
af73623f BS |
2997 | /* too large values might cause issues with arcmsr */ |
2998 | int vpd_buf_len = 64; | |
2999 | ||
66c28f97 MP |
3000 | sdev->no_report_opcodes = 1; |
3001 | ||
3002 | /* Disable WRITE SAME if REPORT SUPPORTED OPERATION | |
3003 | * CODES is unsupported and the device has an ATA | |
3004 | * Information VPD page (SAT). | |
3005 | */ | |
af73623f | 3006 | if (!scsi_get_vpd_page(sdev, 0x89, buffer, vpd_buf_len)) |
66c28f97 MP |
3007 | sdev->no_write_same = 1; |
3008 | } | |
3009 | ||
3010 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME_16) == 1) | |
5db44863 | 3011 | sdkp->ws16 = 1; |
66c28f97 MP |
3012 | |
3013 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME) == 1) | |
3014 | sdkp->ws10 = 1; | |
5db44863 MP |
3015 | } |
3016 | ||
1da177e4 LT |
3017 | /** |
3018 | * sd_revalidate_disk - called the first time a new disk is seen, | |
3019 | * performs disk spin up, read_capacity, etc. | |
3020 | * @disk: struct gendisk we care about | |
3021 | **/ | |
3022 | static int sd_revalidate_disk(struct gendisk *disk) | |
3023 | { | |
3024 | struct scsi_disk *sdkp = scsi_disk(disk); | |
3025 | struct scsi_device *sdp = sdkp->device; | |
ca369d51 | 3026 | struct request_queue *q = sdkp->disk->queue; |
89d94756 | 3027 | sector_t old_capacity = sdkp->capacity; |
1da177e4 | 3028 | unsigned char *buffer; |
ca369d51 | 3029 | unsigned int dev_max, rw_max; |
1da177e4 | 3030 | |
fa0d34be MP |
3031 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, |
3032 | "sd_revalidate_disk\n")); | |
1da177e4 LT |
3033 | |
3034 | /* | |
3035 | * If the device is offline, don't try and read capacity or any | |
3036 | * of the other niceties. | |
3037 | */ | |
3038 | if (!scsi_device_online(sdp)) | |
3039 | goto out; | |
3040 | ||
a6123f14 | 3041 | buffer = kmalloc(SD_BUF_SIZE, GFP_KERNEL); |
1da177e4 | 3042 | if (!buffer) { |
e73aec82 MP |
3043 | sd_printk(KERN_WARNING, sdkp, "sd_revalidate_disk: Memory " |
3044 | "allocation failure.\n"); | |
ea73a9f2 | 3045 | goto out; |
1da177e4 LT |
3046 | } |
3047 | ||
e73aec82 | 3048 | sd_spinup_disk(sdkp); |
1da177e4 LT |
3049 | |
3050 | /* | |
3051 | * Without media there is no reason to ask; moreover, some devices | |
3052 | * react badly if we do. | |
3053 | */ | |
3054 | if (sdkp->media_present) { | |
e73aec82 | 3055 | sd_read_capacity(sdkp, buffer); |
ffd4bc2a | 3056 | |
5ddfe085 | 3057 | if (scsi_device_supports_vpd(sdp)) { |
c98a0eb0 | 3058 | sd_read_block_provisioning(sdkp); |
ffd4bc2a MP |
3059 | sd_read_block_limits(sdkp); |
3060 | sd_read_block_characteristics(sdkp); | |
89d94756 | 3061 | sd_zbc_read_zones(sdkp, buffer); |
ffd4bc2a MP |
3062 | } |
3063 | ||
89d94756 HR |
3064 | sd_print_capacity(sdkp, old_capacity); |
3065 | ||
e73aec82 MP |
3066 | sd_read_write_protect_flag(sdkp, buffer); |
3067 | sd_read_cache_type(sdkp, buffer); | |
e0597d70 | 3068 | sd_read_app_tag_own(sdkp, buffer); |
5db44863 | 3069 | sd_read_write_same(sdkp, buffer); |
1da177e4 | 3070 | } |
461d4e90 | 3071 | |
70a9b873 MP |
3072 | sdkp->first_scan = 0; |
3073 | ||
461d4e90 TH |
3074 | /* |
3075 | * We now have all cache related info, determine how we deal | |
4913efe4 | 3076 | * with flush requests. |
461d4e90 | 3077 | */ |
cb2fb68d | 3078 | sd_set_flush_flag(sdkp); |
461d4e90 | 3079 | |
ca369d51 MP |
3080 | /* Initial block count limit based on CDB TRANSFER LENGTH field size. */ |
3081 | dev_max = sdp->use_16_for_rw ? SD_MAX_XFER_BLOCKS : SD_DEF_XFER_BLOCKS; | |
3082 | ||
3083 | /* Some devices report a maximum block count for READ/WRITE requests. */ | |
3084 | dev_max = min_not_zero(dev_max, sdkp->max_xfer_blocks); | |
3085 | q->limits.max_dev_sectors = logical_to_sectors(sdp, dev_max); | |
3086 | ||
3087 | /* | |
3088 | * Use the device's preferred I/O size for reads and writes | |
9c1d9c20 MP |
3089 | * unless the reported value is unreasonably small, large, or |
3090 | * garbage. | |
ca369d51 | 3091 | */ |
9c1d9c20 MP |
3092 | if (sdkp->opt_xfer_blocks && |
3093 | sdkp->opt_xfer_blocks <= dev_max && | |
3094 | sdkp->opt_xfer_blocks <= SD_DEF_XFER_BLOCKS && | |
6b7e9cde MP |
3095 | logical_to_bytes(sdp, sdkp->opt_xfer_blocks) >= PAGE_SIZE) { |
3096 | q->limits.io_opt = logical_to_bytes(sdp, sdkp->opt_xfer_blocks); | |
3097 | rw_max = logical_to_sectors(sdp, sdkp->opt_xfer_blocks); | |
3098 | } else | |
67804145 FZ |
3099 | rw_max = min_not_zero(logical_to_sectors(sdp, dev_max), |
3100 | (sector_t)BLK_DEF_MAX_SECTORS); | |
3a9794d3 | 3101 | |
ca369d51 MP |
3102 | /* Combine with controller limits */ |
3103 | q->limits.max_sectors = min(rw_max, queue_max_hw_sectors(q)); | |
4f258a46 | 3104 | |
f08bb1e0 | 3105 | set_capacity(disk, logical_to_sectors(sdp, sdkp->capacity)); |
5db44863 | 3106 | sd_config_write_same(sdkp); |
1da177e4 LT |
3107 | kfree(buffer); |
3108 | ||
1da177e4 LT |
3109 | out: |
3110 | return 0; | |
3111 | } | |
3112 | ||
72ec24bd TH |
3113 | /** |
3114 | * sd_unlock_native_capacity - unlock native capacity | |
3115 | * @disk: struct gendisk to set capacity for | |
3116 | * | |
3117 | * Block layer calls this function if it detects that partitions | |
3118 | * on @disk reach beyond the end of the device. If the SCSI host | |
3119 | * implements ->unlock_native_capacity() method, it's invoked to | |
3120 | * give it a chance to adjust the device capacity. | |
3121 | * | |
3122 | * CONTEXT: | |
3123 | * Defined by block layer. Might sleep. | |
3124 | */ | |
3125 | static void sd_unlock_native_capacity(struct gendisk *disk) | |
3126 | { | |
3127 | struct scsi_device *sdev = scsi_disk(disk)->device; | |
3128 | ||
3129 | if (sdev->host->hostt->unlock_native_capacity) | |
3130 | sdev->host->hostt->unlock_native_capacity(sdev); | |
3131 | } | |
3132 | ||
3e1a7ff8 TH |
3133 | /** |
3134 | * sd_format_disk_name - format disk name | |
3135 | * @prefix: name prefix - ie. "sd" for SCSI disks | |
3136 | * @index: index of the disk to format name for | |
3137 | * @buf: output buffer | |
3138 | * @buflen: length of the output buffer | |
3139 | * | |
3140 | * SCSI disk names starts at sda. The 26th device is sdz and the | |
3141 | * 27th is sdaa. The last one for two lettered suffix is sdzz | |
3142 | * which is followed by sdaaa. | |
3143 | * | |
3144 | * This is basically 26 base counting with one extra 'nil' entry | |
3ad2f3fb | 3145 | * at the beginning from the second digit on and can be |
3e1a7ff8 TH |
3146 | * determined using similar method as 26 base conversion with the |
3147 | * index shifted -1 after each digit is computed. | |
3148 | * | |
3149 | * CONTEXT: | |
3150 | * Don't care. | |
3151 | * | |
3152 | * RETURNS: | |
3153 | * 0 on success, -errno on failure. | |
3154 | */ | |
3155 | static int sd_format_disk_name(char *prefix, int index, char *buf, int buflen) | |
3156 | { | |
3157 | const int base = 'z' - 'a' + 1; | |
3158 | char *begin = buf + strlen(prefix); | |
3159 | char *end = buf + buflen; | |
3160 | char *p; | |
3161 | int unit; | |
3162 | ||
3163 | p = end - 1; | |
3164 | *p = '\0'; | |
3165 | unit = base; | |
3166 | do { | |
3167 | if (p == begin) | |
3168 | return -EINVAL; | |
3169 | *--p = 'a' + (index % unit); | |
3170 | index = (index / unit) - 1; | |
3171 | } while (index >= 0); | |
3172 | ||
3173 | memmove(begin, p, end - p); | |
3174 | memcpy(buf, prefix, strlen(prefix)); | |
3175 | ||
3176 | return 0; | |
3177 | } | |
3178 | ||
4ace92fc AV |
3179 | /* |
3180 | * The asynchronous part of sd_probe | |
3181 | */ | |
3182 | static void sd_probe_async(void *data, async_cookie_t cookie) | |
3183 | { | |
3184 | struct scsi_disk *sdkp = data; | |
3185 | struct scsi_device *sdp; | |
3186 | struct gendisk *gd; | |
3187 | u32 index; | |
3188 | struct device *dev; | |
3189 | ||
3190 | sdp = sdkp->device; | |
3191 | gd = sdkp->disk; | |
3192 | index = sdkp->index; | |
3193 | dev = &sdp->sdev_gendev; | |
3194 | ||
1a03ae0f MR |
3195 | gd->major = sd_major((index & 0xf0) >> 4); |
3196 | gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00); | |
3197 | gd->minors = SD_MINORS; | |
3198 | ||
4ace92fc AV |
3199 | gd->fops = &sd_fops; |
3200 | gd->private_data = &sdkp->driver; | |
3201 | gd->queue = sdkp->device->request_queue; | |
3202 | ||
70a9b873 MP |
3203 | /* defaults, until the device tells us otherwise */ |
3204 | sdp->sector_size = 512; | |
3205 | sdkp->capacity = 0; | |
3206 | sdkp->media_present = 1; | |
3207 | sdkp->write_prot = 0; | |
39c60a09 | 3208 | sdkp->cache_override = 0; |
70a9b873 MP |
3209 | sdkp->WCE = 0; |
3210 | sdkp->RCD = 0; | |
3211 | sdkp->ATO = 0; | |
3212 | sdkp->first_scan = 1; | |
18a4d0a2 | 3213 | sdkp->max_medium_access_timeouts = SD_MAX_MEDIUM_TIMEOUTS; |
70a9b873 | 3214 | |
4ace92fc AV |
3215 | sd_revalidate_disk(gd); |
3216 | ||
97fedbbe | 3217 | gd->flags = GENHD_FL_EXT_DEVT; |
2bae0093 | 3218 | if (sdp->removable) { |
4ace92fc | 3219 | gd->flags |= GENHD_FL_REMOVABLE; |
2bae0093 TH |
3220 | gd->events |= DISK_EVENT_MEDIA_CHANGE; |
3221 | } | |
4ace92fc | 3222 | |
10c580e4 | 3223 | blk_pm_runtime_init(sdp->request_queue, dev); |
0d52c756 | 3224 | device_add_disk(dev, gd); |
fe542396 MP |
3225 | if (sdkp->capacity) |
3226 | sd_dif_config_host(sdkp); | |
4ace92fc | 3227 | |
3821d768 MP |
3228 | sd_revalidate_disk(gd); |
3229 | ||
4ace92fc AV |
3230 | sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n", |
3231 | sdp->removable ? "removable " : ""); | |
478a8a05 | 3232 | scsi_autopm_put_device(sdp); |
ea038f63 | 3233 | put_device(&sdkp->dev); |
4ace92fc AV |
3234 | } |
3235 | ||
1da177e4 LT |
3236 | /** |
3237 | * sd_probe - called during driver initialization and whenever a | |
3238 | * new scsi device is attached to the system. It is called once | |
3239 | * for each scsi device (not just disks) present. | |
3240 | * @dev: pointer to device object | |
3241 | * | |
3242 | * Returns 0 if successful (or not interested in this scsi device | |
3243 | * (e.g. scanner)); 1 when there is an error. | |
3244 | * | |
3245 | * Note: this function is invoked from the scsi mid-level. | |
3246 | * This function sets up the mapping between a given | |
3247 | * <host,channel,id,lun> (found in sdp) and new device name | |
3248 | * (e.g. /dev/sda). More precisely it is the block device major | |
3249 | * and minor number that is chosen here. | |
3250 | * | |
2db93ce8 PU |
3251 | * Assume sd_probe is not re-entrant (for time being) |
3252 | * Also think about sd_probe() and sd_remove() running coincidentally. | |
1da177e4 LT |
3253 | **/ |
3254 | static int sd_probe(struct device *dev) | |
3255 | { | |
3256 | struct scsi_device *sdp = to_scsi_device(dev); | |
3257 | struct scsi_disk *sdkp; | |
3258 | struct gendisk *gd; | |
439d77f7 | 3259 | int index; |
1da177e4 LT |
3260 | int error; |
3261 | ||
6fe8c1db | 3262 | scsi_autopm_get_device(sdp); |
1da177e4 | 3263 | error = -ENODEV; |
89d94756 HR |
3264 | if (sdp->type != TYPE_DISK && |
3265 | sdp->type != TYPE_ZBC && | |
3266 | sdp->type != TYPE_MOD && | |
3267 | sdp->type != TYPE_RBC) | |
1da177e4 LT |
3268 | goto out; |
3269 | ||
89d94756 HR |
3270 | #ifndef CONFIG_BLK_DEV_ZONED |
3271 | if (sdp->type == TYPE_ZBC) | |
3272 | goto out; | |
3273 | #endif | |
9ccfc756 | 3274 | SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO, sdp, |
2db93ce8 | 3275 | "sd_probe\n")); |
1da177e4 LT |
3276 | |
3277 | error = -ENOMEM; | |
24669f75 | 3278 | sdkp = kzalloc(sizeof(*sdkp), GFP_KERNEL); |
1da177e4 LT |
3279 | if (!sdkp) |
3280 | goto out; | |
3281 | ||
689d6fac | 3282 | gd = alloc_disk(SD_MINORS); |
1da177e4 | 3283 | if (!gd) |
c01228db | 3284 | goto out_free; |
1da177e4 | 3285 | |
f27bac27 TH |
3286 | do { |
3287 | if (!ida_pre_get(&sd_index_ida, GFP_KERNEL)) | |
3288 | goto out_put; | |
1da177e4 | 3289 | |
4034cc68 | 3290 | spin_lock(&sd_index_lock); |
f27bac27 | 3291 | error = ida_get_new(&sd_index_ida, &index); |
4034cc68 | 3292 | spin_unlock(&sd_index_lock); |
f27bac27 | 3293 | } while (error == -EAGAIN); |
1da177e4 | 3294 | |
21208ae5 DK |
3295 | if (error) { |
3296 | sdev_printk(KERN_WARNING, sdp, "sd_probe: memory exhausted.\n"); | |
1da177e4 | 3297 | goto out_put; |
1a03ae0f MR |
3298 | } |
3299 | ||
3e1a7ff8 | 3300 | error = sd_format_disk_name("sd", index, gd->disk_name, DISK_NAME_LEN); |
21208ae5 DK |
3301 | if (error) { |
3302 | sdev_printk(KERN_WARNING, sdp, "SCSI disk (sd) name length exceeded.\n"); | |
f27bac27 | 3303 | goto out_free_index; |
21208ae5 | 3304 | } |
f27bac27 | 3305 | |
1da177e4 LT |
3306 | sdkp->device = sdp; |
3307 | sdkp->driver = &sd_template; | |
3308 | sdkp->disk = gd; | |
3309 | sdkp->index = index; | |
409f3499 | 3310 | atomic_set(&sdkp->openers, 0); |
9e1a1537 | 3311 | atomic_set(&sdkp->device->ioerr_cnt, 0); |
1da177e4 | 3312 | |
601e7638 JB |
3313 | if (!sdp->request_queue->rq_timeout) { |
3314 | if (sdp->type != TYPE_MOD) | |
3315 | blk_queue_rq_timeout(sdp->request_queue, SD_TIMEOUT); | |
3316 | else | |
3317 | blk_queue_rq_timeout(sdp->request_queue, | |
3318 | SD_MOD_TIMEOUT); | |
3319 | } | |
3320 | ||
3321 | device_initialize(&sdkp->dev); | |
478a8a05 | 3322 | sdkp->dev.parent = dev; |
601e7638 | 3323 | sdkp->dev.class = &sd_disk_class; |
02aa2a37 | 3324 | dev_set_name(&sdkp->dev, "%s", dev_name(dev)); |
601e7638 | 3325 | |
dee0586e DC |
3326 | error = device_add(&sdkp->dev); |
3327 | if (error) | |
601e7638 JB |
3328 | goto out_free_index; |
3329 | ||
478a8a05 AS |
3330 | get_device(dev); |
3331 | dev_set_drvdata(dev, sdkp); | |
601e7638 | 3332 | |
ea038f63 | 3333 | get_device(&sdkp->dev); /* prevent release before async_schedule */ |
a7a20d10 | 3334 | async_schedule_domain(sd_probe_async, sdkp, &scsi_sd_probe_domain); |
1da177e4 LT |
3335 | |
3336 | return 0; | |
3337 | ||
f27bac27 | 3338 | out_free_index: |
c01228db JK |
3339 | spin_lock(&sd_index_lock); |
3340 | ida_remove(&sd_index_ida, index); | |
3341 | spin_unlock(&sd_index_lock); | |
6bdaa1f1 | 3342 | out_put: |
1da177e4 | 3343 | put_disk(gd); |
f170396c CIK |
3344 | out_free: |
3345 | kfree(sdkp); | |
6bdaa1f1 | 3346 | out: |
6fe8c1db | 3347 | scsi_autopm_put_device(sdp); |
1da177e4 LT |
3348 | return error; |
3349 | } | |
3350 | ||
3351 | /** | |
3352 | * sd_remove - called whenever a scsi disk (previously recognized by | |
3353 | * sd_probe) is detached from the system. It is called (potentially | |
3354 | * multiple times) during sd module unload. | |
f2a3313d | 3355 | * @dev: pointer to device object |
1da177e4 LT |
3356 | * |
3357 | * Note: this function is invoked from the scsi mid-level. | |
3358 | * This function potentially frees up a device name (e.g. /dev/sdc) | |
3359 | * that could be re-used by a subsequent sd_probe(). | |
3360 | * This function is not called when the built-in sd driver is "exit-ed". | |
3361 | **/ | |
3362 | static int sd_remove(struct device *dev) | |
3363 | { | |
601e7638 | 3364 | struct scsi_disk *sdkp; |
0761df9c | 3365 | dev_t devt; |
1da177e4 | 3366 | |
601e7638 | 3367 | sdkp = dev_get_drvdata(dev); |
0761df9c | 3368 | devt = disk_devt(sdkp->disk); |
478a8a05 AS |
3369 | scsi_autopm_get_device(sdkp->device); |
3370 | ||
3c31b52f | 3371 | async_synchronize_full_domain(&scsi_sd_pm_domain); |
a7a20d10 | 3372 | async_synchronize_full_domain(&scsi_sd_probe_domain); |
ee959b00 | 3373 | device_del(&sdkp->dev); |
1da177e4 LT |
3374 | del_gendisk(sdkp->disk); |
3375 | sd_shutdown(dev); | |
39b7f1e2 | 3376 | |
89d94756 HR |
3377 | sd_zbc_remove(sdkp); |
3378 | ||
0761df9c HR |
3379 | blk_register_region(devt, SD_MINORS, NULL, |
3380 | sd_default_probe, NULL, NULL); | |
3381 | ||
0b950672 | 3382 | mutex_lock(&sd_ref_mutex); |
39b7f1e2 | 3383 | dev_set_drvdata(dev, NULL); |
ee959b00 | 3384 | put_device(&sdkp->dev); |
0b950672 | 3385 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
3386 | |
3387 | return 0; | |
3388 | } | |
3389 | ||
3390 | /** | |
3391 | * scsi_disk_release - Called to free the scsi_disk structure | |
ee959b00 | 3392 | * @dev: pointer to embedded class device |
1da177e4 | 3393 | * |
0b950672 | 3394 | * sd_ref_mutex must be held entering this routine. Because it is |
1da177e4 LT |
3395 | * called on last put, you should always use the scsi_disk_get() |
3396 | * scsi_disk_put() helpers which manipulate the semaphore directly | |
ee959b00 | 3397 | * and never do a direct put_device. |
1da177e4 | 3398 | **/ |
ee959b00 | 3399 | static void scsi_disk_release(struct device *dev) |
1da177e4 | 3400 | { |
ee959b00 | 3401 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
1da177e4 LT |
3402 | struct gendisk *disk = sdkp->disk; |
3403 | ||
c01228db JK |
3404 | spin_lock(&sd_index_lock); |
3405 | ida_remove(&sd_index_ida, sdkp->index); | |
3406 | spin_unlock(&sd_index_lock); | |
3407 | ||
1da177e4 | 3408 | disk->private_data = NULL; |
1da177e4 | 3409 | put_disk(disk); |
39b7f1e2 | 3410 | put_device(&sdkp->device->sdev_gendev); |
1da177e4 LT |
3411 | |
3412 | kfree(sdkp); | |
3413 | } | |
3414 | ||
cc5d2c8c | 3415 | static int sd_start_stop_device(struct scsi_disk *sdkp, int start) |
c3c94c5a TH |
3416 | { |
3417 | unsigned char cmd[6] = { START_STOP }; /* START_VALID */ | |
3418 | struct scsi_sense_hdr sshdr; | |
cc5d2c8c | 3419 | struct scsi_device *sdp = sdkp->device; |
c3c94c5a TH |
3420 | int res; |
3421 | ||
3422 | if (start) | |
3423 | cmd[4] |= 1; /* START */ | |
3424 | ||
d2886ea3 SR |
3425 | if (sdp->start_stop_pwr_cond) |
3426 | cmd[4] |= start ? 1 << 4 : 3 << 4; /* Active or Standby */ | |
3427 | ||
c3c94c5a TH |
3428 | if (!scsi_device_online(sdp)) |
3429 | return -ENODEV; | |
3430 | ||
fcbfffe2 CH |
3431 | res = scsi_execute(sdp, cmd, DMA_NONE, NULL, 0, NULL, &sshdr, |
3432 | SD_TIMEOUT, SD_MAX_RETRIES, 0, RQF_PM, NULL); | |
c3c94c5a | 3433 | if (res) { |
ef61329d | 3434 | sd_print_result(sdkp, "Start/Stop Unit failed", res); |
c3c94c5a | 3435 | if (driver_byte(res) & DRIVER_SENSE) |
cc5d2c8c | 3436 | sd_print_sense_hdr(sdkp, &sshdr); |
95897910 ON |
3437 | if (scsi_sense_valid(&sshdr) && |
3438 | /* 0x3a is medium not present */ | |
3439 | sshdr.asc == 0x3a) | |
3440 | res = 0; | |
c3c94c5a TH |
3441 | } |
3442 | ||
95897910 ON |
3443 | /* SCSI error codes must not go to the generic layer */ |
3444 | if (res) | |
3445 | return -EIO; | |
3446 | ||
3447 | return 0; | |
c3c94c5a TH |
3448 | } |
3449 | ||
1da177e4 LT |
3450 | /* |
3451 | * Send a SYNCHRONIZE CACHE instruction down to the device through | |
3452 | * the normal SCSI command structure. Wait for the command to | |
3453 | * complete. | |
3454 | */ | |
3455 | static void sd_shutdown(struct device *dev) | |
3456 | { | |
3d9a1f53 | 3457 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
1da177e4 LT |
3458 | |
3459 | if (!sdkp) | |
3460 | return; /* this can happen */ | |
3461 | ||
54f57588 | 3462 | if (pm_runtime_suspended(dev)) |
3d9a1f53 | 3463 | return; |
54f57588 | 3464 | |
95897910 | 3465 | if (sdkp->WCE && sdkp->media_present) { |
e73aec82 | 3466 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
4fa83244 | 3467 | sd_sync_cache(sdkp, NULL); |
39b7f1e2 | 3468 | } |
c3c94c5a | 3469 | |
cc5d2c8c JB |
3470 | if (system_state != SYSTEM_RESTART && sdkp->device->manage_start_stop) { |
3471 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); | |
3472 | sd_start_stop_device(sdkp, 0); | |
c3c94c5a | 3473 | } |
39b7f1e2 | 3474 | } |
1da177e4 | 3475 | |
95897910 | 3476 | static int sd_suspend_common(struct device *dev, bool ignore_stop_errors) |
c3c94c5a | 3477 | { |
3d9a1f53 | 3478 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
4fa83244 | 3479 | struct scsi_sense_hdr sshdr; |
09ff92fe | 3480 | int ret = 0; |
c3c94c5a | 3481 | |
13b43891 AS |
3482 | if (!sdkp) /* E.g.: runtime suspend following sd_remove() */ |
3483 | return 0; | |
c3c94c5a | 3484 | |
95897910 | 3485 | if (sdkp->WCE && sdkp->media_present) { |
cc5d2c8c | 3486 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
4fa83244 DB |
3487 | ret = sd_sync_cache(sdkp, &sshdr); |
3488 | ||
95897910 ON |
3489 | if (ret) { |
3490 | /* ignore OFFLINE device */ | |
3491 | if (ret == -ENODEV) | |
4fa83244 DB |
3492 | return 0; |
3493 | ||
3494 | if (!scsi_sense_valid(&sshdr) || | |
3495 | sshdr.sense_key != ILLEGAL_REQUEST) | |
3496 | return ret; | |
3497 | ||
3498 | /* | |
3499 | * sshdr.sense_key == ILLEGAL_REQUEST means this drive | |
3500 | * doesn't support sync. There's not much to do and | |
3501 | * suspend shouldn't fail. | |
3502 | */ | |
3503 | ret = 0; | |
95897910 | 3504 | } |
c3c94c5a TH |
3505 | } |
3506 | ||
691e3d31 | 3507 | if (sdkp->device->manage_start_stop) { |
cc5d2c8c | 3508 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); |
95897910 | 3509 | /* an error is not worth aborting a system sleep */ |
cc5d2c8c | 3510 | ret = sd_start_stop_device(sdkp, 0); |
95897910 ON |
3511 | if (ignore_stop_errors) |
3512 | ret = 0; | |
c3c94c5a TH |
3513 | } |
3514 | ||
09ff92fe | 3515 | return ret; |
c3c94c5a TH |
3516 | } |
3517 | ||
95897910 ON |
3518 | static int sd_suspend_system(struct device *dev) |
3519 | { | |
3520 | return sd_suspend_common(dev, true); | |
3521 | } | |
3522 | ||
3523 | static int sd_suspend_runtime(struct device *dev) | |
3524 | { | |
3525 | return sd_suspend_common(dev, false); | |
3526 | } | |
3527 | ||
c3c94c5a TH |
3528 | static int sd_resume(struct device *dev) |
3529 | { | |
3d9a1f53 | 3530 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
c3c94c5a | 3531 | |
13b43891 AS |
3532 | if (!sdkp) /* E.g.: runtime resume at the start of sd_probe() */ |
3533 | return 0; | |
3534 | ||
cc5d2c8c | 3535 | if (!sdkp->device->manage_start_stop) |
3d9a1f53 | 3536 | return 0; |
c3c94c5a | 3537 | |
cc5d2c8c | 3538 | sd_printk(KERN_NOTICE, sdkp, "Starting disk\n"); |
3d9a1f53 | 3539 | return sd_start_stop_device(sdkp, 1); |
c3c94c5a TH |
3540 | } |
3541 | ||
1da177e4 LT |
3542 | /** |
3543 | * init_sd - entry point for this driver (both when built in or when | |
3544 | * a module). | |
3545 | * | |
3546 | * Note: this function registers this driver with the scsi mid-level. | |
3547 | **/ | |
3548 | static int __init init_sd(void) | |
3549 | { | |
5e4009ba | 3550 | int majors = 0, i, err; |
1da177e4 LT |
3551 | |
3552 | SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n")); | |
3553 | ||
0761df9c HR |
3554 | for (i = 0; i < SD_MAJORS; i++) { |
3555 | if (register_blkdev(sd_major(i), "sd") != 0) | |
3556 | continue; | |
3557 | majors++; | |
3558 | blk_register_region(sd_major(i), SD_MINORS, NULL, | |
3559 | sd_default_probe, NULL, NULL); | |
3560 | } | |
1da177e4 LT |
3561 | |
3562 | if (!majors) | |
3563 | return -ENODEV; | |
3564 | ||
5e4009ba JG |
3565 | err = class_register(&sd_disk_class); |
3566 | if (err) | |
3567 | goto err_out; | |
6bdaa1f1 | 3568 | |
4e7392ec MP |
3569 | sd_cdb_cache = kmem_cache_create("sd_ext_cdb", SD_EXT_CDB_SIZE, |
3570 | 0, 0, NULL); | |
3571 | if (!sd_cdb_cache) { | |
3572 | printk(KERN_ERR "sd: can't init extended cdb cache\n"); | |
8d964478 | 3573 | err = -ENOMEM; |
4e7392ec MP |
3574 | goto err_out_class; |
3575 | } | |
3576 | ||
3577 | sd_cdb_pool = mempool_create_slab_pool(SD_MEMPOOL_SIZE, sd_cdb_cache); | |
3578 | if (!sd_cdb_pool) { | |
3579 | printk(KERN_ERR "sd: can't init extended cdb pool\n"); | |
8d964478 | 3580 | err = -ENOMEM; |
4e7392ec MP |
3581 | goto err_out_cache; |
3582 | } | |
3583 | ||
afd5e34b JD |
3584 | err = scsi_register_driver(&sd_template.gendrv); |
3585 | if (err) | |
3586 | goto err_out_driver; | |
3587 | ||
5e4009ba JG |
3588 | return 0; |
3589 | ||
afd5e34b JD |
3590 | err_out_driver: |
3591 | mempool_destroy(sd_cdb_pool); | |
3592 | ||
4e7392ec MP |
3593 | err_out_cache: |
3594 | kmem_cache_destroy(sd_cdb_cache); | |
3595 | ||
5e4009ba JG |
3596 | err_out_class: |
3597 | class_unregister(&sd_disk_class); | |
3598 | err_out: | |
3599 | for (i = 0; i < SD_MAJORS; i++) | |
3600 | unregister_blkdev(sd_major(i), "sd"); | |
3601 | return err; | |
1da177e4 LT |
3602 | } |
3603 | ||
3604 | /** | |
3605 | * exit_sd - exit point for this driver (when it is a module). | |
3606 | * | |
3607 | * Note: this function unregisters this driver from the scsi mid-level. | |
3608 | **/ | |
3609 | static void __exit exit_sd(void) | |
3610 | { | |
3611 | int i; | |
3612 | ||
3613 | SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n")); | |
3614 | ||
afd5e34b | 3615 | scsi_unregister_driver(&sd_template.gendrv); |
4e7392ec MP |
3616 | mempool_destroy(sd_cdb_pool); |
3617 | kmem_cache_destroy(sd_cdb_cache); | |
3618 | ||
5e4009ba JG |
3619 | class_unregister(&sd_disk_class); |
3620 | ||
0761df9c HR |
3621 | for (i = 0; i < SD_MAJORS; i++) { |
3622 | blk_unregister_region(sd_major(i), SD_MINORS); | |
1da177e4 | 3623 | unregister_blkdev(sd_major(i), "sd"); |
0761df9c | 3624 | } |
1da177e4 LT |
3625 | } |
3626 | ||
1da177e4 LT |
3627 | module_init(init_sd); |
3628 | module_exit(exit_sd); | |
e73aec82 MP |
3629 | |
3630 | static void sd_print_sense_hdr(struct scsi_disk *sdkp, | |
3631 | struct scsi_sense_hdr *sshdr) | |
3632 | { | |
21045519 HR |
3633 | scsi_print_sense_hdr(sdkp->device, |
3634 | sdkp->disk ? sdkp->disk->disk_name : NULL, sshdr); | |
e73aec82 MP |
3635 | } |
3636 | ||
ef61329d HR |
3637 | static void sd_print_result(const struct scsi_disk *sdkp, const char *msg, |
3638 | int result) | |
e73aec82 | 3639 | { |
ef61329d HR |
3640 | const char *hb_string = scsi_hostbyte_string(result); |
3641 | const char *db_string = scsi_driverbyte_string(result); | |
3642 | ||
3643 | if (hb_string || db_string) | |
3644 | sd_printk(KERN_INFO, sdkp, | |
3645 | "%s: Result: hostbyte=%s driverbyte=%s\n", msg, | |
3646 | hb_string ? hb_string : "invalid", | |
3647 | db_string ? db_string : "invalid"); | |
3648 | else | |
3649 | sd_printk(KERN_INFO, sdkp, | |
3650 | "%s: Result: hostbyte=0x%02x driverbyte=0x%02x\n", | |
3651 | msg, host_byte(result), driver_byte(result)); | |
e73aec82 MP |
3652 | } |
3653 |