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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> | |
bca6b067 | 48 | #include <linux/blk-pm.h> |
1da177e4 | 49 | #include <linux/delay.h> |
0b950672 | 50 | #include <linux/mutex.h> |
7404ad3b | 51 | #include <linux/string_helpers.h> |
4ace92fc | 52 | #include <linux/async.h> |
5a0e3ad6 | 53 | #include <linux/slab.h> |
d80210f2 | 54 | #include <linux/sed-opal.h> |
54f57588 | 55 | #include <linux/pm_runtime.h> |
924d55b0 | 56 | #include <linux/pr.h> |
8475c811 | 57 | #include <linux/t10-pi.h> |
7c0f6ba6 | 58 | #include <linux/uaccess.h> |
8f76d151 | 59 | #include <asm/unaligned.h> |
1da177e4 LT |
60 | |
61 | #include <scsi/scsi.h> | |
62 | #include <scsi/scsi_cmnd.h> | |
63 | #include <scsi/scsi_dbg.h> | |
64 | #include <scsi/scsi_device.h> | |
65 | #include <scsi/scsi_driver.h> | |
66 | #include <scsi/scsi_eh.h> | |
67 | #include <scsi/scsi_host.h> | |
68 | #include <scsi/scsi_ioctl.h> | |
1da177e4 LT |
69 | #include <scsi/scsicam.h> |
70 | ||
aa91696e | 71 | #include "sd.h" |
a7a20d10 | 72 | #include "scsi_priv.h" |
1da177e4 LT |
73 | #include "scsi_logging.h" |
74 | ||
f018fa55 RH |
75 | MODULE_AUTHOR("Eric Youngdale"); |
76 | MODULE_DESCRIPTION("SCSI disk (sd) driver"); | |
77 | MODULE_LICENSE("GPL"); | |
78 | ||
79 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK0_MAJOR); | |
80 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK1_MAJOR); | |
81 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK2_MAJOR); | |
82 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK3_MAJOR); | |
83 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK4_MAJOR); | |
84 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK5_MAJOR); | |
85 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK6_MAJOR); | |
86 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK7_MAJOR); | |
87 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK8_MAJOR); | |
88 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK9_MAJOR); | |
89 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK10_MAJOR); | |
90 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK11_MAJOR); | |
91 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK12_MAJOR); | |
92 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK13_MAJOR); | |
93 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK14_MAJOR); | |
94 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK15_MAJOR); | |
d7b8bcb0 MT |
95 | MODULE_ALIAS_SCSI_DEVICE(TYPE_DISK); |
96 | MODULE_ALIAS_SCSI_DEVICE(TYPE_MOD); | |
97 | MODULE_ALIAS_SCSI_DEVICE(TYPE_RBC); | |
89d94756 | 98 | MODULE_ALIAS_SCSI_DEVICE(TYPE_ZBC); |
f018fa55 | 99 | |
870d6656 | 100 | #if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT) |
f615b48c | 101 | #define SD_MINORS 16 |
870d6656 | 102 | #else |
3e1a7ff8 | 103 | #define SD_MINORS 0 |
870d6656 TH |
104 | #endif |
105 | ||
c98a0eb0 | 106 | static void sd_config_discard(struct scsi_disk *, unsigned int); |
5db44863 | 107 | static void sd_config_write_same(struct scsi_disk *); |
7b3d9545 | 108 | static int sd_revalidate_disk(struct gendisk *); |
72ec24bd | 109 | static void sd_unlock_native_capacity(struct gendisk *disk); |
7b3d9545 LT |
110 | static int sd_probe(struct device *); |
111 | static int sd_remove(struct device *); | |
112 | static void sd_shutdown(struct device *); | |
95897910 ON |
113 | static int sd_suspend_system(struct device *); |
114 | static int sd_suspend_runtime(struct device *); | |
7b3d9545 LT |
115 | static int sd_resume(struct device *); |
116 | static void sd_rescan(struct device *); | |
159b2cbf | 117 | static blk_status_t sd_init_command(struct scsi_cmnd *SCpnt); |
a1b73fc1 | 118 | static void sd_uninit_command(struct scsi_cmnd *SCpnt); |
7b3d9545 | 119 | static int sd_done(struct scsi_cmnd *); |
7a38dc0b | 120 | static void sd_eh_reset(struct scsi_cmnd *); |
2451079b | 121 | static int sd_eh_action(struct scsi_cmnd *, int); |
7b3d9545 | 122 | static void sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer); |
ee959b00 | 123 | static void scsi_disk_release(struct device *cdev); |
7b3d9545 | 124 | static void sd_print_sense_hdr(struct scsi_disk *, struct scsi_sense_hdr *); |
ef61329d | 125 | static void sd_print_result(const struct scsi_disk *, const char *, int); |
7b3d9545 | 126 | |
f27bac27 | 127 | static DEFINE_IDA(sd_index_ida); |
1da177e4 LT |
128 | |
129 | /* This semaphore is used to mediate the 0->1 reference get in the | |
130 | * face of object destruction (i.e. we can't allow a get on an | |
131 | * object after last put) */ | |
0b950672 | 132 | static DEFINE_MUTEX(sd_ref_mutex); |
1da177e4 | 133 | |
439d77f7 HS |
134 | static struct kmem_cache *sd_cdb_cache; |
135 | static mempool_t *sd_cdb_pool; | |
61cce6f6 | 136 | static mempool_t *sd_page_pool; |
4e7392ec | 137 | |
6bdaa1f1 JB |
138 | static const char *sd_cache_types[] = { |
139 | "write through", "none", "write back", | |
140 | "write back, no read (daft)" | |
141 | }; | |
142 | ||
cb2fb68d VC |
143 | static void sd_set_flush_flag(struct scsi_disk *sdkp) |
144 | { | |
eb310e23 | 145 | bool wc = false, fua = false; |
cb2fb68d VC |
146 | |
147 | if (sdkp->WCE) { | |
eb310e23 | 148 | wc = true; |
cb2fb68d | 149 | if (sdkp->DPOFUA) |
eb310e23 | 150 | fua = true; |
cb2fb68d VC |
151 | } |
152 | ||
eb310e23 | 153 | blk_queue_write_cache(sdkp->disk->queue, wc, fua); |
cb2fb68d VC |
154 | } |
155 | ||
ee959b00 | 156 | static ssize_t |
e1ea2351 GKH |
157 | cache_type_store(struct device *dev, struct device_attribute *attr, |
158 | const char *buf, size_t count) | |
6bdaa1f1 | 159 | { |
4c11712a | 160 | int ct, rcd, wce, sp; |
ee959b00 | 161 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
162 | struct scsi_device *sdp = sdkp->device; |
163 | char buffer[64]; | |
164 | char *buffer_data; | |
165 | struct scsi_mode_data data; | |
166 | struct scsi_sense_hdr sshdr; | |
2ee3e26c | 167 | static const char temp[] = "temporary "; |
6bdaa1f1 JB |
168 | int len; |
169 | ||
89d94756 | 170 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) |
6bdaa1f1 JB |
171 | /* no cache control on RBC devices; theoretically they |
172 | * can do it, but there's probably so many exceptions | |
173 | * it's not worth the risk */ | |
174 | return -EINVAL; | |
175 | ||
39c60a09 JB |
176 | if (strncmp(buf, temp, sizeof(temp) - 1) == 0) { |
177 | buf += sizeof(temp) - 1; | |
178 | sdkp->cache_override = 1; | |
179 | } else { | |
180 | sdkp->cache_override = 0; | |
181 | } | |
182 | ||
4c11712a | 183 | ct = sysfs_match_string(sd_cache_types, buf); |
6bdaa1f1 JB |
184 | if (ct < 0) |
185 | return -EINVAL; | |
4c11712a | 186 | |
6bdaa1f1 | 187 | rcd = ct & 0x01 ? 1 : 0; |
2eefd57b | 188 | wce = (ct & 0x02) && !sdkp->write_prot ? 1 : 0; |
39c60a09 JB |
189 | |
190 | if (sdkp->cache_override) { | |
191 | sdkp->WCE = wce; | |
192 | sdkp->RCD = rcd; | |
cb2fb68d | 193 | sd_set_flush_flag(sdkp); |
39c60a09 JB |
194 | return count; |
195 | } | |
196 | ||
6bdaa1f1 JB |
197 | if (scsi_mode_sense(sdp, 0x08, 8, buffer, sizeof(buffer), SD_TIMEOUT, |
198 | SD_MAX_RETRIES, &data, NULL)) | |
199 | return -EINVAL; | |
a9312fb8 | 200 | len = min_t(size_t, sizeof(buffer), data.length - data.header_length - |
6bdaa1f1 JB |
201 | data.block_descriptor_length); |
202 | buffer_data = buffer + data.header_length + | |
203 | data.block_descriptor_length; | |
204 | buffer_data[2] &= ~0x05; | |
205 | buffer_data[2] |= wce << 2 | rcd; | |
206 | sp = buffer_data[0] & 0x80 ? 1 : 0; | |
2c5d16d6 | 207 | buffer_data[0] &= ~0x80; |
6bdaa1f1 JB |
208 | |
209 | if (scsi_mode_select(sdp, 1, sp, 8, buffer_data, len, SD_TIMEOUT, | |
210 | SD_MAX_RETRIES, &data, &sshdr)) { | |
211 | if (scsi_sense_valid(&sshdr)) | |
e73aec82 | 212 | sd_print_sense_hdr(sdkp, &sshdr); |
6bdaa1f1 JB |
213 | return -EINVAL; |
214 | } | |
f98a8cae | 215 | revalidate_disk(sdkp->disk); |
6bdaa1f1 JB |
216 | return count; |
217 | } | |
218 | ||
ee959b00 | 219 | static ssize_t |
e1ea2351 GKH |
220 | manage_start_stop_show(struct device *dev, struct device_attribute *attr, |
221 | char *buf) | |
222 | { | |
223 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
224 | struct scsi_device *sdp = sdkp->device; | |
225 | ||
4c11712a | 226 | return sprintf(buf, "%u\n", sdp->manage_start_stop); |
e1ea2351 GKH |
227 | } |
228 | ||
229 | static ssize_t | |
230 | manage_start_stop_store(struct device *dev, struct device_attribute *attr, | |
231 | const char *buf, size_t count) | |
c3c94c5a | 232 | { |
ee959b00 | 233 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
c3c94c5a | 234 | struct scsi_device *sdp = sdkp->device; |
623401ee | 235 | bool v; |
c3c94c5a TH |
236 | |
237 | if (!capable(CAP_SYS_ADMIN)) | |
238 | return -EACCES; | |
239 | ||
623401ee | 240 | if (kstrtobool(buf, &v)) |
241 | return -EINVAL; | |
242 | ||
243 | sdp->manage_start_stop = v; | |
c3c94c5a TH |
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 | ||
4c11712a | 254 | return sprintf(buf, "%u\n", sdkp->device->allow_restart); |
e1ea2351 GKH |
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 | { |
658e9a6d | 261 | bool v; |
ee959b00 | 262 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
a144c5ae BK |
263 | struct scsi_device *sdp = sdkp->device; |
264 | ||
265 | if (!capable(CAP_SYS_ADMIN)) | |
266 | return -EACCES; | |
267 | ||
89d94756 | 268 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) |
a144c5ae BK |
269 | return -EINVAL; |
270 | ||
658e9a6d | 271 | if (kstrtobool(buf, &v)) |
272 | return -EINVAL; | |
273 | ||
274 | sdp->allow_restart = v; | |
a144c5ae BK |
275 | |
276 | return count; | |
277 | } | |
e1ea2351 | 278 | static DEVICE_ATTR_RW(allow_restart); |
a144c5ae | 279 | |
ee959b00 | 280 | static ssize_t |
e1ea2351 | 281 | cache_type_show(struct device *dev, struct device_attribute *attr, char *buf) |
6bdaa1f1 | 282 | { |
ee959b00 | 283 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
284 | int ct = sdkp->RCD + 2*sdkp->WCE; |
285 | ||
4c11712a | 286 | return sprintf(buf, "%s\n", sd_cache_types[ct]); |
6bdaa1f1 | 287 | } |
e1ea2351 | 288 | static DEVICE_ATTR_RW(cache_type); |
6bdaa1f1 | 289 | |
ee959b00 | 290 | static ssize_t |
e1ea2351 | 291 | FUA_show(struct device *dev, struct device_attribute *attr, char *buf) |
6bdaa1f1 | 292 | { |
ee959b00 | 293 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 | 294 | |
4c11712a | 295 | return sprintf(buf, "%u\n", sdkp->DPOFUA); |
6bdaa1f1 | 296 | } |
e1ea2351 | 297 | static DEVICE_ATTR_RO(FUA); |
6bdaa1f1 | 298 | |
ee959b00 | 299 | static ssize_t |
e1ea2351 GKH |
300 | protection_type_show(struct device *dev, struct device_attribute *attr, |
301 | char *buf) | |
e0597d70 MP |
302 | { |
303 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
304 | ||
4c11712a | 305 | return sprintf(buf, "%u\n", sdkp->protection_type); |
e0597d70 MP |
306 | } |
307 | ||
8172499a | 308 | static ssize_t |
e1ea2351 GKH |
309 | protection_type_store(struct device *dev, struct device_attribute *attr, |
310 | const char *buf, size_t count) | |
8172499a MP |
311 | { |
312 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
313 | unsigned int val; | |
314 | int err; | |
315 | ||
316 | if (!capable(CAP_SYS_ADMIN)) | |
317 | return -EACCES; | |
318 | ||
319 | err = kstrtouint(buf, 10, &val); | |
320 | ||
321 | if (err) | |
322 | return err; | |
323 | ||
830cc351 | 324 | if (val <= T10_PI_TYPE3_PROTECTION) |
8172499a MP |
325 | sdkp->protection_type = val; |
326 | ||
327 | return count; | |
328 | } | |
e1ea2351 | 329 | static DEVICE_ATTR_RW(protection_type); |
8172499a | 330 | |
518fa8e3 | 331 | static ssize_t |
e1ea2351 GKH |
332 | protection_mode_show(struct device *dev, struct device_attribute *attr, |
333 | char *buf) | |
518fa8e3 MP |
334 | { |
335 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
336 | struct scsi_device *sdp = sdkp->device; | |
337 | unsigned int dif, dix; | |
338 | ||
339 | dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type); | |
340 | dix = scsi_host_dix_capable(sdp->host, sdkp->protection_type); | |
341 | ||
8475c811 | 342 | if (!dix && scsi_host_dix_capable(sdp->host, T10_PI_TYPE0_PROTECTION)) { |
518fa8e3 MP |
343 | dif = 0; |
344 | dix = 1; | |
345 | } | |
346 | ||
347 | if (!dif && !dix) | |
4c11712a | 348 | return sprintf(buf, "none\n"); |
518fa8e3 | 349 | |
4c11712a | 350 | return sprintf(buf, "%s%u\n", dix ? "dix" : "dif", dif); |
518fa8e3 | 351 | } |
e1ea2351 | 352 | static DEVICE_ATTR_RO(protection_mode); |
518fa8e3 | 353 | |
e0597d70 | 354 | static ssize_t |
e1ea2351 | 355 | app_tag_own_show(struct device *dev, struct device_attribute *attr, char *buf) |
e0597d70 MP |
356 | { |
357 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
358 | ||
4c11712a | 359 | return sprintf(buf, "%u\n", sdkp->ATO); |
e0597d70 | 360 | } |
e1ea2351 | 361 | static DEVICE_ATTR_RO(app_tag_own); |
e0597d70 | 362 | |
e339c1a7 | 363 | static ssize_t |
e1ea2351 GKH |
364 | thin_provisioning_show(struct device *dev, struct device_attribute *attr, |
365 | char *buf) | |
e339c1a7 MP |
366 | { |
367 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
368 | ||
4c11712a | 369 | return sprintf(buf, "%u\n", sdkp->lbpme); |
c98a0eb0 | 370 | } |
e1ea2351 | 371 | static DEVICE_ATTR_RO(thin_provisioning); |
c98a0eb0 | 372 | |
4c11712a | 373 | /* sysfs_match_string() requires dense arrays */ |
c98a0eb0 MP |
374 | static const char *lbp_mode[] = { |
375 | [SD_LBP_FULL] = "full", | |
376 | [SD_LBP_UNMAP] = "unmap", | |
377 | [SD_LBP_WS16] = "writesame_16", | |
378 | [SD_LBP_WS10] = "writesame_10", | |
379 | [SD_LBP_ZERO] = "writesame_zero", | |
380 | [SD_LBP_DISABLE] = "disabled", | |
381 | }; | |
382 | ||
383 | static ssize_t | |
e1ea2351 GKH |
384 | provisioning_mode_show(struct device *dev, struct device_attribute *attr, |
385 | char *buf) | |
c98a0eb0 MP |
386 | { |
387 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
388 | ||
4c11712a | 389 | return sprintf(buf, "%s\n", lbp_mode[sdkp->provisioning_mode]); |
c98a0eb0 MP |
390 | } |
391 | ||
392 | static ssize_t | |
e1ea2351 GKH |
393 | provisioning_mode_store(struct device *dev, struct device_attribute *attr, |
394 | const char *buf, size_t count) | |
c98a0eb0 MP |
395 | { |
396 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
397 | struct scsi_device *sdp = sdkp->device; | |
4c11712a | 398 | int mode; |
c98a0eb0 MP |
399 | |
400 | if (!capable(CAP_SYS_ADMIN)) | |
401 | return -EACCES; | |
402 | ||
89d94756 HR |
403 | if (sd_is_zoned(sdkp)) { |
404 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
405 | return count; | |
406 | } | |
407 | ||
c98a0eb0 MP |
408 | if (sdp->type != TYPE_DISK) |
409 | return -EINVAL; | |
410 | ||
4c11712a MP |
411 | mode = sysfs_match_string(lbp_mode, buf); |
412 | if (mode < 0) | |
c98a0eb0 MP |
413 | return -EINVAL; |
414 | ||
4c11712a MP |
415 | sd_config_discard(sdkp, mode); |
416 | ||
c98a0eb0 | 417 | return count; |
e339c1a7 | 418 | } |
e1ea2351 | 419 | static DEVICE_ATTR_RW(provisioning_mode); |
e339c1a7 | 420 | |
4c11712a | 421 | /* sysfs_match_string() requires dense arrays */ |
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 | ||
4c11712a | 435 | return sprintf(buf, "%s\n", zeroing_mode[sdkp->zeroing_mode]); |
e6bd9312 MP |
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); | |
4c11712a | 443 | int mode; |
e6bd9312 MP |
444 | |
445 | if (!capable(CAP_SYS_ADMIN)) | |
446 | return -EACCES; | |
447 | ||
4c11712a MP |
448 | mode = sysfs_match_string(zeroing_mode, buf); |
449 | if (mode < 0) | |
e6bd9312 MP |
450 | return -EINVAL; |
451 | ||
4c11712a MP |
452 | sdkp->zeroing_mode = mode; |
453 | ||
e6bd9312 MP |
454 | return count; |
455 | } | |
456 | static DEVICE_ATTR_RW(zeroing_mode); | |
457 | ||
18a4d0a2 | 458 | static ssize_t |
e1ea2351 GKH |
459 | max_medium_access_timeouts_show(struct device *dev, |
460 | struct device_attribute *attr, char *buf) | |
18a4d0a2 MP |
461 | { |
462 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
463 | ||
4c11712a | 464 | return sprintf(buf, "%u\n", sdkp->max_medium_access_timeouts); |
18a4d0a2 MP |
465 | } |
466 | ||
467 | static ssize_t | |
e1ea2351 GKH |
468 | max_medium_access_timeouts_store(struct device *dev, |
469 | struct device_attribute *attr, const char *buf, | |
470 | size_t count) | |
18a4d0a2 MP |
471 | { |
472 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
473 | int err; | |
474 | ||
475 | if (!capable(CAP_SYS_ADMIN)) | |
476 | return -EACCES; | |
477 | ||
478 | err = kstrtouint(buf, 10, &sdkp->max_medium_access_timeouts); | |
479 | ||
480 | return err ? err : count; | |
481 | } | |
e1ea2351 | 482 | static DEVICE_ATTR_RW(max_medium_access_timeouts); |
18a4d0a2 | 483 | |
5db44863 | 484 | static ssize_t |
e1ea2351 GKH |
485 | max_write_same_blocks_show(struct device *dev, struct device_attribute *attr, |
486 | char *buf) | |
5db44863 MP |
487 | { |
488 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
489 | ||
4c11712a | 490 | return sprintf(buf, "%u\n", sdkp->max_ws_blocks); |
5db44863 MP |
491 | } |
492 | ||
493 | static ssize_t | |
e1ea2351 GKH |
494 | max_write_same_blocks_store(struct device *dev, struct device_attribute *attr, |
495 | const char *buf, size_t count) | |
5db44863 MP |
496 | { |
497 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
498 | struct scsi_device *sdp = sdkp->device; | |
499 | unsigned long max; | |
500 | int err; | |
501 | ||
502 | if (!capable(CAP_SYS_ADMIN)) | |
503 | return -EACCES; | |
504 | ||
89d94756 | 505 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) |
5db44863 MP |
506 | return -EINVAL; |
507 | ||
508 | err = kstrtoul(buf, 10, &max); | |
509 | ||
510 | if (err) | |
511 | return err; | |
512 | ||
513 | if (max == 0) | |
514 | sdp->no_write_same = 1; | |
66c28f97 MP |
515 | else if (max <= SD_MAX_WS16_BLOCKS) { |
516 | sdp->no_write_same = 0; | |
5db44863 | 517 | sdkp->max_ws_blocks = max; |
66c28f97 | 518 | } |
5db44863 MP |
519 | |
520 | sd_config_write_same(sdkp); | |
521 | ||
522 | return count; | |
523 | } | |
e1ea2351 GKH |
524 | static DEVICE_ATTR_RW(max_write_same_blocks); |
525 | ||
526 | static struct attribute *sd_disk_attrs[] = { | |
527 | &dev_attr_cache_type.attr, | |
528 | &dev_attr_FUA.attr, | |
529 | &dev_attr_allow_restart.attr, | |
530 | &dev_attr_manage_start_stop.attr, | |
531 | &dev_attr_protection_type.attr, | |
532 | &dev_attr_protection_mode.attr, | |
533 | &dev_attr_app_tag_own.attr, | |
534 | &dev_attr_thin_provisioning.attr, | |
535 | &dev_attr_provisioning_mode.attr, | |
e6bd9312 | 536 | &dev_attr_zeroing_mode.attr, |
e1ea2351 GKH |
537 | &dev_attr_max_write_same_blocks.attr, |
538 | &dev_attr_max_medium_access_timeouts.attr, | |
539 | NULL, | |
6bdaa1f1 | 540 | }; |
e1ea2351 | 541 | ATTRIBUTE_GROUPS(sd_disk); |
6bdaa1f1 JB |
542 | |
543 | static struct class sd_disk_class = { | |
544 | .name = "scsi_disk", | |
545 | .owner = THIS_MODULE, | |
ee959b00 | 546 | .dev_release = scsi_disk_release, |
e1ea2351 | 547 | .dev_groups = sd_disk_groups, |
6bdaa1f1 | 548 | }; |
1da177e4 | 549 | |
691e3d31 | 550 | static const struct dev_pm_ops sd_pm_ops = { |
95897910 | 551 | .suspend = sd_suspend_system, |
691e3d31 | 552 | .resume = sd_resume, |
95897910 | 553 | .poweroff = sd_suspend_system, |
691e3d31 | 554 | .restore = sd_resume, |
95897910 | 555 | .runtime_suspend = sd_suspend_runtime, |
691e3d31 AL |
556 | .runtime_resume = sd_resume, |
557 | }; | |
558 | ||
1da177e4 | 559 | static struct scsi_driver sd_template = { |
1da177e4 LT |
560 | .gendrv = { |
561 | .name = "sd", | |
3af6b352 | 562 | .owner = THIS_MODULE, |
1da177e4 LT |
563 | .probe = sd_probe, |
564 | .remove = sd_remove, | |
565 | .shutdown = sd_shutdown, | |
691e3d31 | 566 | .pm = &sd_pm_ops, |
1da177e4 LT |
567 | }, |
568 | .rescan = sd_rescan, | |
a1b73fc1 CH |
569 | .init_command = sd_init_command, |
570 | .uninit_command = sd_uninit_command, | |
7b3d9545 | 571 | .done = sd_done, |
18a4d0a2 | 572 | .eh_action = sd_eh_action, |
7a38dc0b | 573 | .eh_reset = sd_eh_reset, |
1da177e4 LT |
574 | }; |
575 | ||
0761df9c HR |
576 | /* |
577 | * Dummy kobj_map->probe function. | |
578 | * The default ->probe function will call modprobe, which is | |
579 | * pointless as this module is already loaded. | |
580 | */ | |
581 | static struct kobject *sd_default_probe(dev_t devt, int *partno, void *data) | |
582 | { | |
583 | return NULL; | |
584 | } | |
585 | ||
1da177e4 LT |
586 | /* |
587 | * Device no to disk mapping: | |
588 | * | |
589 | * major disc2 disc p1 | |
590 | * |............|.............|....|....| <- dev_t | |
591 | * 31 20 19 8 7 4 3 0 | |
592 | * | |
593 | * Inside a major, we have 16k disks, however mapped non- | |
594 | * contiguously. The first 16 disks are for major0, the next | |
595 | * ones with major1, ... Disk 256 is for major0 again, disk 272 | |
596 | * for major1, ... | |
597 | * As we stay compatible with our numbering scheme, we can reuse | |
598 | * the well-know SCSI majors 8, 65--71, 136--143. | |
599 | */ | |
600 | static int sd_major(int major_idx) | |
601 | { | |
602 | switch (major_idx) { | |
603 | case 0: | |
604 | return SCSI_DISK0_MAJOR; | |
605 | case 1 ... 7: | |
606 | return SCSI_DISK1_MAJOR + major_idx - 1; | |
607 | case 8 ... 15: | |
608 | return SCSI_DISK8_MAJOR + major_idx - 8; | |
609 | default: | |
610 | BUG(); | |
611 | return 0; /* shut up gcc */ | |
612 | } | |
613 | } | |
614 | ||
3d9a1f53 | 615 | static struct scsi_disk *scsi_disk_get(struct gendisk *disk) |
1da177e4 LT |
616 | { |
617 | struct scsi_disk *sdkp = NULL; | |
618 | ||
3d9a1f53 CH |
619 | mutex_lock(&sd_ref_mutex); |
620 | ||
39b7f1e2 AS |
621 | if (disk->private_data) { |
622 | sdkp = scsi_disk(disk); | |
623 | if (scsi_device_get(sdkp->device) == 0) | |
ee959b00 | 624 | get_device(&sdkp->dev); |
39b7f1e2 AS |
625 | else |
626 | sdkp = NULL; | |
627 | } | |
0b950672 | 628 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
629 | return sdkp; |
630 | } | |
631 | ||
632 | static void scsi_disk_put(struct scsi_disk *sdkp) | |
633 | { | |
634 | struct scsi_device *sdev = sdkp->device; | |
635 | ||
0b950672 | 636 | mutex_lock(&sd_ref_mutex); |
ee959b00 | 637 | put_device(&sdkp->dev); |
1da177e4 | 638 | scsi_device_put(sdev); |
0b950672 | 639 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
640 | } |
641 | ||
d80210f2 CH |
642 | #ifdef CONFIG_BLK_SED_OPAL |
643 | static int sd_sec_submit(void *data, u16 spsp, u8 secp, void *buffer, | |
644 | size_t len, bool send) | |
645 | { | |
646 | struct scsi_device *sdev = data; | |
647 | u8 cdb[12] = { 0, }; | |
648 | int ret; | |
649 | ||
650 | cdb[0] = send ? SECURITY_PROTOCOL_OUT : SECURITY_PROTOCOL_IN; | |
651 | cdb[1] = secp; | |
652 | put_unaligned_be16(spsp, &cdb[2]); | |
653 | put_unaligned_be32(len, &cdb[6]); | |
654 | ||
655 | ret = scsi_execute_req(sdev, cdb, | |
656 | send ? DMA_TO_DEVICE : DMA_FROM_DEVICE, | |
657 | buffer, len, NULL, SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
658 | return ret <= 0 ? ret : -EIO; | |
659 | } | |
660 | #endif /* CONFIG_BLK_SED_OPAL */ | |
661 | ||
082c2cd2 JG |
662 | /* |
663 | * Look up the DIX operation based on whether the command is read or | |
664 | * write and whether dix and dif are enabled. | |
665 | */ | |
666 | static unsigned int sd_prot_op(bool write, bool dix, bool dif) | |
667 | { | |
668 | /* Lookup table: bit 2 (write), bit 1 (dix), bit 0 (dif) */ | |
669 | static const unsigned int ops[] = { /* wrt dix dif */ | |
670 | SCSI_PROT_NORMAL, /* 0 0 0 */ | |
671 | SCSI_PROT_READ_STRIP, /* 0 0 1 */ | |
672 | SCSI_PROT_READ_INSERT, /* 0 1 0 */ | |
673 | SCSI_PROT_READ_PASS, /* 0 1 1 */ | |
674 | SCSI_PROT_NORMAL, /* 1 0 0 */ | |
675 | SCSI_PROT_WRITE_INSERT, /* 1 0 1 */ | |
676 | SCSI_PROT_WRITE_STRIP, /* 1 1 0 */ | |
677 | SCSI_PROT_WRITE_PASS, /* 1 1 1 */ | |
678 | }; | |
679 | ||
680 | return ops[write << 2 | dix << 1 | dif]; | |
681 | } | |
682 | ||
683 | /* | |
684 | * Returns a mask of the protection flags that are valid for a given DIX | |
685 | * operation. | |
686 | */ | |
687 | static unsigned int sd_prot_flag_mask(unsigned int prot_op) | |
688 | { | |
689 | static const unsigned int flag_mask[] = { | |
690 | [SCSI_PROT_NORMAL] = 0, | |
691 | ||
692 | [SCSI_PROT_READ_STRIP] = SCSI_PROT_TRANSFER_PI | | |
693 | SCSI_PROT_GUARD_CHECK | | |
694 | SCSI_PROT_REF_CHECK | | |
695 | SCSI_PROT_REF_INCREMENT, | |
696 | ||
697 | [SCSI_PROT_READ_INSERT] = SCSI_PROT_REF_INCREMENT | | |
698 | SCSI_PROT_IP_CHECKSUM, | |
699 | ||
700 | [SCSI_PROT_READ_PASS] = SCSI_PROT_TRANSFER_PI | | |
701 | SCSI_PROT_GUARD_CHECK | | |
702 | SCSI_PROT_REF_CHECK | | |
703 | SCSI_PROT_REF_INCREMENT | | |
704 | SCSI_PROT_IP_CHECKSUM, | |
705 | ||
706 | [SCSI_PROT_WRITE_INSERT] = SCSI_PROT_TRANSFER_PI | | |
707 | SCSI_PROT_REF_INCREMENT, | |
708 | ||
709 | [SCSI_PROT_WRITE_STRIP] = SCSI_PROT_GUARD_CHECK | | |
710 | SCSI_PROT_REF_CHECK | | |
711 | SCSI_PROT_REF_INCREMENT | | |
712 | SCSI_PROT_IP_CHECKSUM, | |
713 | ||
714 | [SCSI_PROT_WRITE_PASS] = SCSI_PROT_TRANSFER_PI | | |
715 | SCSI_PROT_GUARD_CHECK | | |
716 | SCSI_PROT_REF_CHECK | | |
717 | SCSI_PROT_REF_INCREMENT | | |
718 | SCSI_PROT_IP_CHECKSUM, | |
719 | }; | |
720 | ||
721 | return flag_mask[prot_op]; | |
722 | } | |
723 | ||
c611529e MP |
724 | static unsigned char sd_setup_protect_cmnd(struct scsi_cmnd *scmd, |
725 | unsigned int dix, unsigned int dif) | |
35e1a5d9 | 726 | { |
c611529e MP |
727 | struct bio *bio = scmd->request->bio; |
728 | unsigned int prot_op = sd_prot_op(rq_data_dir(scmd->request), dix, dif); | |
729 | unsigned int protect = 0; | |
730 | ||
731 | if (dix) { /* DIX Type 0, 1, 2, 3 */ | |
732 | if (bio_integrity_flagged(bio, BIP_IP_CHECKSUM)) | |
733 | scmd->prot_flags |= SCSI_PROT_IP_CHECKSUM; | |
734 | ||
735 | if (bio_integrity_flagged(bio, BIP_CTRL_NOCHECK) == false) | |
736 | scmd->prot_flags |= SCSI_PROT_GUARD_CHECK; | |
737 | } | |
738 | ||
8475c811 | 739 | if (dif != T10_PI_TYPE3_PROTECTION) { /* DIX/DIF Type 0, 1, 2 */ |
c611529e MP |
740 | scmd->prot_flags |= SCSI_PROT_REF_INCREMENT; |
741 | ||
742 | if (bio_integrity_flagged(bio, BIP_CTRL_NOCHECK) == false) | |
743 | scmd->prot_flags |= SCSI_PROT_REF_CHECK; | |
744 | } | |
745 | ||
746 | if (dif) { /* DIX/DIF Type 1, 2, 3 */ | |
747 | scmd->prot_flags |= SCSI_PROT_TRANSFER_PI; | |
748 | ||
749 | if (bio_integrity_flagged(bio, BIP_DISK_NOCHECK)) | |
750 | protect = 3 << 5; /* Disable target PI checking */ | |
751 | else | |
752 | protect = 1 << 5; /* Enable target PI checking */ | |
35e1a5d9 MP |
753 | } |
754 | ||
755 | scsi_set_prot_op(scmd, prot_op); | |
756 | scsi_set_prot_type(scmd, dif); | |
c611529e MP |
757 | scmd->prot_flags &= sd_prot_flag_mask(prot_op); |
758 | ||
759 | return protect; | |
35e1a5d9 MP |
760 | } |
761 | ||
c98a0eb0 MP |
762 | static void sd_config_discard(struct scsi_disk *sdkp, unsigned int mode) |
763 | { | |
764 | struct request_queue *q = sdkp->disk->queue; | |
765 | unsigned int logical_block_size = sdkp->device->sector_size; | |
766 | unsigned int max_blocks = 0; | |
767 | ||
bcd069bb MP |
768 | q->limits.discard_alignment = |
769 | sdkp->unmap_alignment * logical_block_size; | |
770 | q->limits.discard_granularity = | |
771 | max(sdkp->physical_block_size, | |
772 | sdkp->unmap_granularity * logical_block_size); | |
89730393 MP |
773 | sdkp->provisioning_mode = mode; |
774 | ||
c98a0eb0 MP |
775 | switch (mode) { |
776 | ||
4c11712a | 777 | case SD_LBP_FULL: |
c98a0eb0 | 778 | case SD_LBP_DISABLE: |
2bb4cd5c | 779 | blk_queue_max_discard_sectors(q, 0); |
8b904b5b | 780 | blk_queue_flag_clear(QUEUE_FLAG_DISCARD, q); |
c98a0eb0 MP |
781 | return; |
782 | ||
783 | case SD_LBP_UNMAP: | |
5db44863 MP |
784 | max_blocks = min_not_zero(sdkp->max_unmap_blocks, |
785 | (u32)SD_MAX_WS16_BLOCKS); | |
c98a0eb0 MP |
786 | break; |
787 | ||
788 | case SD_LBP_WS16: | |
28a0bc41 MP |
789 | if (sdkp->device->unmap_limit_for_ws) |
790 | max_blocks = sdkp->max_unmap_blocks; | |
791 | else | |
792 | max_blocks = sdkp->max_ws_blocks; | |
793 | ||
794 | max_blocks = min_not_zero(max_blocks, (u32)SD_MAX_WS16_BLOCKS); | |
c98a0eb0 MP |
795 | break; |
796 | ||
797 | case SD_LBP_WS10: | |
28a0bc41 MP |
798 | if (sdkp->device->unmap_limit_for_ws) |
799 | max_blocks = sdkp->max_unmap_blocks; | |
800 | else | |
801 | max_blocks = sdkp->max_ws_blocks; | |
802 | ||
803 | max_blocks = min_not_zero(max_blocks, (u32)SD_MAX_WS10_BLOCKS); | |
c98a0eb0 MP |
804 | break; |
805 | ||
806 | case SD_LBP_ZERO: | |
5db44863 MP |
807 | max_blocks = min_not_zero(sdkp->max_ws_blocks, |
808 | (u32)SD_MAX_WS10_BLOCKS); | |
c98a0eb0 MP |
809 | break; |
810 | } | |
811 | ||
2bb4cd5c | 812 | blk_queue_max_discard_sectors(q, max_blocks * (logical_block_size >> 9)); |
8b904b5b | 813 | blk_queue_flag_set(QUEUE_FLAG_DISCARD, q); |
c98a0eb0 MP |
814 | } |
815 | ||
159b2cbf | 816 | static blk_status_t sd_setup_unmap_cmnd(struct scsi_cmnd *cmd) |
e339c1a7 | 817 | { |
6a7b4398 | 818 | struct scsi_device *sdp = cmd->device; |
81d926e8 | 819 | struct request *rq = cmd->request; |
c6c93fdd MP |
820 | u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq)); |
821 | u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq)); | |
81d926e8 | 822 | unsigned int data_len = 24; |
c98a0eb0 | 823 | char *buf; |
e339c1a7 | 824 | |
61cce6f6 | 825 | rq->special_vec.bv_page = mempool_alloc(sd_page_pool, GFP_ATOMIC); |
81d926e8 | 826 | if (!rq->special_vec.bv_page) |
159b2cbf | 827 | return BLK_STS_RESOURCE; |
61cce6f6 | 828 | clear_highpage(rq->special_vec.bv_page); |
81d926e8 CH |
829 | rq->special_vec.bv_offset = 0; |
830 | rq->special_vec.bv_len = data_len; | |
831 | rq->rq_flags |= RQF_SPECIAL_PAYLOAD; | |
66ac0280 | 832 | |
81d926e8 CH |
833 | cmd->cmd_len = 10; |
834 | cmd->cmnd[0] = UNMAP; | |
835 | cmd->cmnd[8] = 24; | |
e339c1a7 | 836 | |
81d926e8 CH |
837 | buf = page_address(rq->special_vec.bv_page); |
838 | put_unaligned_be16(6 + 16, &buf[0]); | |
839 | put_unaligned_be16(16, &buf[2]); | |
c6c93fdd MP |
840 | put_unaligned_be64(lba, &buf[8]); |
841 | put_unaligned_be32(nr_blocks, &buf[16]); | |
e339c1a7 | 842 | |
81d926e8 CH |
843 | cmd->allowed = SD_MAX_RETRIES; |
844 | cmd->transfersize = data_len; | |
845 | rq->timeout = SD_TIMEOUT; | |
e339c1a7 | 846 | |
81d926e8 CH |
847 | return scsi_init_io(cmd); |
848 | } | |
c98a0eb0 | 849 | |
159b2cbf CH |
850 | static blk_status_t sd_setup_write_same16_cmnd(struct scsi_cmnd *cmd, |
851 | bool unmap) | |
81d926e8 CH |
852 | { |
853 | struct scsi_device *sdp = cmd->device; | |
854 | struct request *rq = cmd->request; | |
c6c93fdd MP |
855 | u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq)); |
856 | u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq)); | |
81d926e8 | 857 | u32 data_len = sdp->sector_size; |
c98a0eb0 | 858 | |
61cce6f6 | 859 | rq->special_vec.bv_page = mempool_alloc(sd_page_pool, GFP_ATOMIC); |
81d926e8 | 860 | if (!rq->special_vec.bv_page) |
159b2cbf | 861 | return BLK_STS_RESOURCE; |
61cce6f6 | 862 | clear_highpage(rq->special_vec.bv_page); |
81d926e8 CH |
863 | rq->special_vec.bv_offset = 0; |
864 | rq->special_vec.bv_len = data_len; | |
865 | rq->rq_flags |= RQF_SPECIAL_PAYLOAD; | |
c98a0eb0 | 866 | |
81d926e8 CH |
867 | cmd->cmd_len = 16; |
868 | cmd->cmnd[0] = WRITE_SAME_16; | |
02d26103 | 869 | if (unmap) |
6a7b4398 | 870 | cmd->cmnd[1] = 0x8; /* UNMAP */ |
c6c93fdd MP |
871 | put_unaligned_be64(lba, &cmd->cmnd[2]); |
872 | put_unaligned_be32(nr_blocks, &cmd->cmnd[10]); | |
66ac0280 | 873 | |
81d926e8 CH |
874 | cmd->allowed = SD_MAX_RETRIES; |
875 | cmd->transfersize = data_len; | |
02d26103 | 876 | rq->timeout = unmap ? SD_TIMEOUT : SD_WRITE_SAME_TIMEOUT; |
c98a0eb0 | 877 | |
81d926e8 CH |
878 | return scsi_init_io(cmd); |
879 | } | |
c98a0eb0 | 880 | |
159b2cbf CH |
881 | static blk_status_t sd_setup_write_same10_cmnd(struct scsi_cmnd *cmd, |
882 | bool unmap) | |
81d926e8 CH |
883 | { |
884 | struct scsi_device *sdp = cmd->device; | |
885 | struct request *rq = cmd->request; | |
c6c93fdd MP |
886 | u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq)); |
887 | u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq)); | |
81d926e8 | 888 | u32 data_len = sdp->sector_size; |
c98a0eb0 | 889 | |
61cce6f6 | 890 | rq->special_vec.bv_page = mempool_alloc(sd_page_pool, GFP_ATOMIC); |
81d926e8 | 891 | if (!rq->special_vec.bv_page) |
159b2cbf | 892 | return BLK_STS_RESOURCE; |
61cce6f6 | 893 | clear_highpage(rq->special_vec.bv_page); |
81d926e8 CH |
894 | rq->special_vec.bv_offset = 0; |
895 | rq->special_vec.bv_len = data_len; | |
f9d03f96 | 896 | rq->rq_flags |= RQF_SPECIAL_PAYLOAD; |
e339c1a7 | 897 | |
81d926e8 CH |
898 | cmd->cmd_len = 10; |
899 | cmd->cmnd[0] = WRITE_SAME; | |
900 | if (unmap) | |
901 | cmd->cmnd[1] = 0x8; /* UNMAP */ | |
c6c93fdd MP |
902 | put_unaligned_be32(lba, &cmd->cmnd[2]); |
903 | put_unaligned_be16(nr_blocks, &cmd->cmnd[7]); | |
6a7b4398 | 904 | |
e4200f8e | 905 | cmd->allowed = SD_MAX_RETRIES; |
81d926e8 | 906 | cmd->transfersize = data_len; |
02d26103 | 907 | rq->timeout = unmap ? SD_TIMEOUT : SD_WRITE_SAME_TIMEOUT; |
6a7b4398 | 908 | |
81d926e8 | 909 | return scsi_init_io(cmd); |
f1126e95 | 910 | } |
f9d03f96 | 911 | |
159b2cbf | 912 | static blk_status_t sd_setup_write_zeroes_cmnd(struct scsi_cmnd *cmd) |
02d26103 CH |
913 | { |
914 | struct request *rq = cmd->request; | |
915 | struct scsi_device *sdp = cmd->device; | |
916 | struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); | |
c6c93fdd MP |
917 | u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq)); |
918 | u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq)); | |
02d26103 | 919 | |
e4b87837 | 920 | if (!(rq->cmd_flags & REQ_NOUNMAP)) { |
e6bd9312 MP |
921 | switch (sdkp->zeroing_mode) { |
922 | case SD_ZERO_WS16_UNMAP: | |
39051dd8 | 923 | return sd_setup_write_same16_cmnd(cmd, true); |
e6bd9312 | 924 | case SD_ZERO_WS10_UNMAP: |
39051dd8 | 925 | return sd_setup_write_same10_cmnd(cmd, true); |
e4b87837 CH |
926 | } |
927 | } | |
c98a0eb0 | 928 | |
02d26103 | 929 | if (sdp->no_write_same) |
159b2cbf | 930 | return BLK_STS_TARGET; |
ed44fd7f | 931 | |
c6c93fdd | 932 | if (sdkp->ws16 || lba > 0xffffffff || nr_blocks > 0xffff) |
39051dd8 | 933 | return sd_setup_write_same16_cmnd(cmd, false); |
ed44fd7f | 934 | |
39051dd8 | 935 | return sd_setup_write_same10_cmnd(cmd, false); |
f1126e95 FT |
936 | } |
937 | ||
5db44863 MP |
938 | static void sd_config_write_same(struct scsi_disk *sdkp) |
939 | { | |
940 | struct request_queue *q = sdkp->disk->queue; | |
941 | unsigned int logical_block_size = sdkp->device->sector_size; | |
5db44863 MP |
942 | |
943 | if (sdkp->device->no_write_same) { | |
944 | sdkp->max_ws_blocks = 0; | |
945 | goto out; | |
946 | } | |
947 | ||
948 | /* Some devices can not handle block counts above 0xffff despite | |
949 | * supporting WRITE SAME(16). Consequently we default to 64k | |
950 | * blocks per I/O unless the device explicitly advertises a | |
951 | * bigger limit. | |
952 | */ | |
66c28f97 MP |
953 | if (sdkp->max_ws_blocks > SD_MAX_WS10_BLOCKS) |
954 | sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks, | |
955 | (u32)SD_MAX_WS16_BLOCKS); | |
956 | else if (sdkp->ws16 || sdkp->ws10 || sdkp->device->no_report_opcodes) | |
957 | sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks, | |
958 | (u32)SD_MAX_WS10_BLOCKS); | |
959 | else { | |
960 | sdkp->device->no_write_same = 1; | |
961 | sdkp->max_ws_blocks = 0; | |
962 | } | |
5db44863 | 963 | |
e6bd9312 MP |
964 | if (sdkp->lbprz && sdkp->lbpws) |
965 | sdkp->zeroing_mode = SD_ZERO_WS16_UNMAP; | |
966 | else if (sdkp->lbprz && sdkp->lbpws10) | |
967 | sdkp->zeroing_mode = SD_ZERO_WS10_UNMAP; | |
968 | else if (sdkp->max_ws_blocks) | |
969 | sdkp->zeroing_mode = SD_ZERO_WS; | |
970 | else | |
971 | sdkp->zeroing_mode = SD_ZERO_WRITE; | |
972 | ||
b7af62a9 DLM |
973 | if (sdkp->max_ws_blocks && |
974 | sdkp->physical_block_size > logical_block_size) { | |
975 | /* | |
976 | * Reporting a maximum number of blocks that is not aligned | |
977 | * on the device physical size would cause a large write same | |
978 | * request to be split into physically unaligned chunks by | |
979 | * __blkdev_issue_write_zeroes() and __blkdev_issue_write_same() | |
980 | * even if the caller of these functions took care to align the | |
981 | * large request. So make sure the maximum reported is aligned | |
982 | * to the device physical block size. This is only an optional | |
983 | * optimization for regular disks, but this is mandatory to | |
984 | * avoid failure of large write same requests directed at | |
985 | * sequential write required zones of host-managed ZBC disks. | |
986 | */ | |
987 | sdkp->max_ws_blocks = | |
988 | round_down(sdkp->max_ws_blocks, | |
989 | bytes_to_logical(sdkp->device, | |
990 | sdkp->physical_block_size)); | |
991 | } | |
992 | ||
5db44863 | 993 | out: |
66c28f97 MP |
994 | blk_queue_max_write_same_sectors(q, sdkp->max_ws_blocks * |
995 | (logical_block_size >> 9)); | |
02d26103 CH |
996 | blk_queue_max_write_zeroes_sectors(q, sdkp->max_ws_blocks * |
997 | (logical_block_size >> 9)); | |
5db44863 MP |
998 | } |
999 | ||
1000 | /** | |
1001 | * sd_setup_write_same_cmnd - write the same data to multiple blocks | |
59b1134c | 1002 | * @cmd: command to prepare |
5db44863 | 1003 | * |
7529fbb0 DLM |
1004 | * Will set up either WRITE SAME(10) or WRITE SAME(16) depending on |
1005 | * the preference indicated by the target device. | |
5db44863 | 1006 | **/ |
159b2cbf | 1007 | static blk_status_t sd_setup_write_same_cmnd(struct scsi_cmnd *cmd) |
5db44863 | 1008 | { |
59b1134c CH |
1009 | struct request *rq = cmd->request; |
1010 | struct scsi_device *sdp = cmd->device; | |
5db44863 MP |
1011 | struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); |
1012 | struct bio *bio = rq->bio; | |
c6c93fdd MP |
1013 | u64 lba = sectors_to_logical(sdp, blk_rq_pos(rq)); |
1014 | u32 nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq)); | |
159b2cbf | 1015 | blk_status_t ret; |
5db44863 MP |
1016 | |
1017 | if (sdkp->device->no_write_same) | |
159b2cbf | 1018 | return BLK_STS_TARGET; |
5db44863 | 1019 | |
a4ad39b1 | 1020 | BUG_ON(bio_offset(bio) || bio_iovec(bio).bv_len != sdp->sector_size); |
5db44863 | 1021 | |
5db44863 | 1022 | rq->timeout = SD_WRITE_SAME_TIMEOUT; |
5db44863 | 1023 | |
c6c93fdd | 1024 | if (sdkp->ws16 || lba > 0xffffffff || nr_blocks > 0xffff) { |
59b1134c CH |
1025 | cmd->cmd_len = 16; |
1026 | cmd->cmnd[0] = WRITE_SAME_16; | |
c6c93fdd MP |
1027 | put_unaligned_be64(lba, &cmd->cmnd[2]); |
1028 | put_unaligned_be32(nr_blocks, &cmd->cmnd[10]); | |
5db44863 | 1029 | } else { |
59b1134c CH |
1030 | cmd->cmd_len = 10; |
1031 | cmd->cmnd[0] = WRITE_SAME; | |
c6c93fdd MP |
1032 | put_unaligned_be32(lba, &cmd->cmnd[2]); |
1033 | put_unaligned_be16(nr_blocks, &cmd->cmnd[7]); | |
5db44863 MP |
1034 | } |
1035 | ||
59b1134c | 1036 | cmd->transfersize = sdp->sector_size; |
a25ee548 | 1037 | cmd->allowed = SD_MAX_RETRIES; |
08965c2e BVA |
1038 | |
1039 | /* | |
1040 | * For WRITE SAME the data transferred via the DATA OUT buffer is | |
1041 | * different from the amount of data actually written to the target. | |
1042 | * | |
1043 | * We set up __data_len to the amount of data transferred via the | |
1044 | * DATA OUT buffer so that blk_rq_map_sg sets up the proper S/G list | |
1045 | * to transfer a single sector of data first, but then reset it to | |
1046 | * the amount of data to be written right after so that the I/O path | |
1047 | * knows how much to actually write. | |
1048 | */ | |
1049 | rq->__data_len = sdp->sector_size; | |
1050 | ret = scsi_init_io(cmd); | |
84f7a9de | 1051 | rq->__data_len = blk_rq_bytes(rq); |
29f6ca69 | 1052 | |
08965c2e | 1053 | return ret; |
5db44863 MP |
1054 | } |
1055 | ||
159b2cbf | 1056 | static blk_status_t sd_setup_flush_cmnd(struct scsi_cmnd *cmd) |
90467c29 | 1057 | { |
a118c6c1 CH |
1058 | struct request *rq = cmd->request; |
1059 | ||
1060 | /* flush requests don't perform I/O, zero the S/G table */ | |
1061 | memset(&cmd->sdb, 0, sizeof(cmd->sdb)); | |
90467c29 | 1062 | |
a118c6c1 CH |
1063 | cmd->cmnd[0] = SYNCHRONIZE_CACHE; |
1064 | cmd->cmd_len = 10; | |
1065 | cmd->transfersize = 0; | |
1066 | cmd->allowed = SD_MAX_RETRIES; | |
1067 | ||
26b9fd8b | 1068 | rq->timeout = rq->q->rq_timeout * SD_FLUSH_TIMEOUT_MULTIPLIER; |
159b2cbf | 1069 | return BLK_STS_OK; |
90467c29 FT |
1070 | } |
1071 | ||
78a02f49 MP |
1072 | static blk_status_t sd_setup_rw32_cmnd(struct scsi_cmnd *cmd, bool write, |
1073 | sector_t lba, unsigned int nr_blocks, | |
1074 | unsigned char flags) | |
1075 | { | |
1076 | cmd->cmnd = mempool_alloc(sd_cdb_pool, GFP_ATOMIC); | |
1077 | if (unlikely(cmd->cmnd == NULL)) | |
1078 | return BLK_STS_RESOURCE; | |
1079 | ||
1080 | cmd->cmd_len = SD_EXT_CDB_SIZE; | |
1081 | memset(cmd->cmnd, 0, cmd->cmd_len); | |
1082 | ||
1083 | cmd->cmnd[0] = VARIABLE_LENGTH_CMD; | |
1084 | cmd->cmnd[7] = 0x18; /* Additional CDB len */ | |
1085 | cmd->cmnd[9] = write ? WRITE_32 : READ_32; | |
1086 | cmd->cmnd[10] = flags; | |
1087 | put_unaligned_be64(lba, &cmd->cmnd[12]); | |
1088 | put_unaligned_be32(lba, &cmd->cmnd[20]); /* Expected Indirect LBA */ | |
1089 | put_unaligned_be32(nr_blocks, &cmd->cmnd[28]); | |
1090 | ||
1091 | return BLK_STS_OK; | |
1092 | } | |
1093 | ||
1094 | static blk_status_t sd_setup_rw16_cmnd(struct scsi_cmnd *cmd, bool write, | |
1095 | sector_t lba, unsigned int nr_blocks, | |
1096 | unsigned char flags) | |
1097 | { | |
1098 | cmd->cmd_len = 16; | |
1099 | cmd->cmnd[0] = write ? WRITE_16 : READ_16; | |
1100 | cmd->cmnd[1] = flags; | |
1101 | cmd->cmnd[14] = 0; | |
1102 | cmd->cmnd[15] = 0; | |
1103 | put_unaligned_be64(lba, &cmd->cmnd[2]); | |
1104 | put_unaligned_be32(nr_blocks, &cmd->cmnd[10]); | |
1105 | ||
1106 | return BLK_STS_OK; | |
1107 | } | |
1108 | ||
1109 | static blk_status_t sd_setup_rw10_cmnd(struct scsi_cmnd *cmd, bool write, | |
1110 | sector_t lba, unsigned int nr_blocks, | |
1111 | unsigned char flags) | |
1112 | { | |
1113 | cmd->cmd_len = 10; | |
1114 | cmd->cmnd[0] = write ? WRITE_10 : READ_10; | |
1115 | cmd->cmnd[1] = flags; | |
1116 | cmd->cmnd[6] = 0; | |
1117 | cmd->cmnd[9] = 0; | |
1118 | put_unaligned_be32(lba, &cmd->cmnd[2]); | |
1119 | put_unaligned_be16(nr_blocks, &cmd->cmnd[7]); | |
1120 | ||
1121 | return BLK_STS_OK; | |
1122 | } | |
1123 | ||
1124 | static blk_status_t sd_setup_rw6_cmnd(struct scsi_cmnd *cmd, bool write, | |
1125 | sector_t lba, unsigned int nr_blocks, | |
1126 | unsigned char flags) | |
1127 | { | |
db5db4b9 BVA |
1128 | /* Avoid that 0 blocks gets translated into 256 blocks. */ |
1129 | if (WARN_ON_ONCE(nr_blocks == 0)) | |
1130 | return BLK_STS_IOERR; | |
1131 | ||
78a02f49 MP |
1132 | if (unlikely(flags & 0x8)) { |
1133 | /* | |
1134 | * This happens only if this drive failed 10byte rw | |
1135 | * command with ILLEGAL_REQUEST during operation and | |
1136 | * thus turned off use_10_for_rw. | |
1137 | */ | |
1138 | scmd_printk(KERN_ERR, cmd, "FUA write on READ/WRITE(6) drive\n"); | |
1139 | return BLK_STS_IOERR; | |
1140 | } | |
1141 | ||
1142 | cmd->cmd_len = 6; | |
1143 | cmd->cmnd[0] = write ? WRITE_6 : READ_6; | |
1144 | cmd->cmnd[1] = (lba >> 16) & 0x1f; | |
1145 | cmd->cmnd[2] = (lba >> 8) & 0xff; | |
1146 | cmd->cmnd[3] = lba & 0xff; | |
1147 | cmd->cmnd[4] = nr_blocks; | |
1148 | cmd->cmnd[5] = 0; | |
1149 | ||
1150 | return BLK_STS_OK; | |
1151 | } | |
1152 | ||
cf64e5a5 | 1153 | static blk_status_t sd_setup_read_write_cmnd(struct scsi_cmnd *cmd) |
1da177e4 | 1154 | { |
cf64e5a5 BVA |
1155 | struct request *rq = cmd->request; |
1156 | struct scsi_device *sdp = cmd->device; | |
e249e42d | 1157 | struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); |
ec029758 | 1158 | sector_t lba = sectors_to_logical(sdp, blk_rq_pos(rq)); |
18351070 | 1159 | sector_t threshold; |
ec029758 | 1160 | unsigned int nr_blocks = sectors_to_logical(sdp, blk_rq_sectors(rq)); |
e249e42d | 1161 | bool dif, dix; |
ec029758 | 1162 | unsigned int mask = logical_to_sectors(sdp, 1) - 1; |
78a02f49 MP |
1163 | bool write = rq_data_dir(rq) == WRITE; |
1164 | unsigned char protect, fua; | |
159b2cbf | 1165 | blk_status_t ret; |
7f9a6bc4 | 1166 | |
cf64e5a5 | 1167 | ret = scsi_init_io(cmd); |
159b2cbf | 1168 | if (ret != BLK_STS_OK) |
39051dd8 | 1169 | return ret; |
e249e42d | 1170 | |
e249e42d | 1171 | if (!scsi_device_online(sdp) || sdp->changed) { |
cf64e5a5 | 1172 | scmd_printk(KERN_ERR, cmd, "device offline or changed\n"); |
159b2cbf | 1173 | return BLK_STS_IOERR; |
1da177e4 LT |
1174 | } |
1175 | ||
e249e42d | 1176 | if (blk_rq_pos(rq) + blk_rq_sectors(rq) > get_capacity(rq->rq_disk)) { |
cf64e5a5 | 1177 | scmd_printk(KERN_ERR, cmd, "access beyond end of device\n"); |
e249e42d MP |
1178 | return BLK_STS_IOERR; |
1179 | } | |
1180 | ||
1181 | if ((blk_rq_pos(rq) & mask) || (blk_rq_sectors(rq) & mask)) { | |
cf64e5a5 | 1182 | scmd_printk(KERN_ERR, cmd, "request not aligned to the logical block size\n"); |
159b2cbf | 1183 | return BLK_STS_IOERR; |
1da177e4 | 1184 | } |
7f9a6bc4 | 1185 | |
a0899d4d | 1186 | /* |
ec029758 MP |
1187 | * Some SD card readers can't handle accesses which touch the |
1188 | * last one or two logical blocks. Split accesses as needed. | |
a0899d4d | 1189 | */ |
ec029758 | 1190 | threshold = sdkp->capacity - SD_LAST_BUGGY_SECTORS; |
18351070 | 1191 | |
c6c93fdd MP |
1192 | if (unlikely(sdp->last_sector_bug && lba + nr_blocks > threshold)) { |
1193 | if (lba < threshold) { | |
18351070 | 1194 | /* Access up to the threshold but not beyond */ |
c6c93fdd | 1195 | nr_blocks = threshold - lba; |
18351070 | 1196 | } else { |
ec029758 MP |
1197 | /* Access only a single logical block */ |
1198 | nr_blocks = 1; | |
18351070 LT |
1199 | } |
1200 | } | |
a0899d4d | 1201 | |
78a02f49 | 1202 | fua = rq->cmd_flags & REQ_FUA ? 0x8 : 0; |
cf64e5a5 BVA |
1203 | dix = scsi_prot_sg_count(cmd); |
1204 | dif = scsi_host_dif_capable(cmd->device->host, sdkp->protection_type); | |
c611529e | 1205 | |
e249e42d | 1206 | if (write && dix) |
cf64e5a5 | 1207 | t10_pi_prepare(cmd->request, sdkp->protection_type); |
e249e42d | 1208 | |
c611529e | 1209 | if (dif || dix) |
cf64e5a5 | 1210 | protect = sd_setup_protect_cmnd(cmd, dix, dif); |
af55ff67 | 1211 | else |
4e7392ec MP |
1212 | protect = 0; |
1213 | ||
8475c811 | 1214 | if (protect && sdkp->protection_type == T10_PI_TYPE2_PROTECTION) { |
cf64e5a5 | 1215 | ret = sd_setup_rw32_cmnd(cmd, write, lba, nr_blocks, |
78a02f49 | 1216 | protect | fua); |
c6c93fdd | 1217 | } else if (sdp->use_16_for_rw || (nr_blocks > 0xffff)) { |
cf64e5a5 | 1218 | ret = sd_setup_rw16_cmnd(cmd, write, lba, nr_blocks, |
78a02f49 | 1219 | protect | fua); |
c6c93fdd | 1220 | } else if ((nr_blocks > 0xff) || (lba > 0x1fffff) || |
e249e42d | 1221 | sdp->use_10_for_rw || protect) { |
cf64e5a5 | 1222 | ret = sd_setup_rw10_cmnd(cmd, write, lba, nr_blocks, |
78a02f49 | 1223 | protect | fua); |
1da177e4 | 1224 | } else { |
cf64e5a5 | 1225 | ret = sd_setup_rw6_cmnd(cmd, write, lba, nr_blocks, |
78a02f49 | 1226 | protect | fua); |
1da177e4 | 1227 | } |
78a02f49 MP |
1228 | |
1229 | if (unlikely(ret != BLK_STS_OK)) | |
1230 | return ret; | |
1231 | ||
1da177e4 LT |
1232 | /* |
1233 | * We shouldn't disconnect in the middle of a sector, so with a dumb | |
1234 | * host adapter, it's safe to assume that we can at least transfer | |
1235 | * this many bytes between each connect / disconnect. | |
1236 | */ | |
cf64e5a5 BVA |
1237 | cmd->transfersize = sdp->sector_size; |
1238 | cmd->underflow = nr_blocks << 9; | |
1239 | cmd->allowed = SD_MAX_RETRIES; | |
1240 | cmd->sdb.length = nr_blocks * sdp->sector_size; | |
e249e42d MP |
1241 | |
1242 | SCSI_LOG_HLQUEUE(1, | |
cf64e5a5 | 1243 | scmd_printk(KERN_INFO, cmd, |
e249e42d MP |
1244 | "%s: block=%llu, count=%d\n", __func__, |
1245 | (unsigned long long)blk_rq_pos(rq), | |
1246 | blk_rq_sectors(rq))); | |
1247 | SCSI_LOG_HLQUEUE(2, | |
cf64e5a5 | 1248 | scmd_printk(KERN_INFO, cmd, |
e249e42d MP |
1249 | "%s %d/%u 512 byte blocks.\n", |
1250 | write ? "writing" : "reading", nr_blocks, | |
1251 | blk_rq_sectors(rq))); | |
1da177e4 | 1252 | |
1da177e4 LT |
1253 | /* |
1254 | * This indicates that the command is ready from our end to be | |
1255 | * queued. | |
1256 | */ | |
159b2cbf | 1257 | return BLK_STS_OK; |
1da177e4 LT |
1258 | } |
1259 | ||
159b2cbf | 1260 | static blk_status_t sd_init_command(struct scsi_cmnd *cmd) |
87949eee CH |
1261 | { |
1262 | struct request *rq = cmd->request; | |
1263 | ||
c2df40df MC |
1264 | switch (req_op(rq)) { |
1265 | case REQ_OP_DISCARD: | |
81d926e8 CH |
1266 | switch (scsi_disk(rq->rq_disk)->provisioning_mode) { |
1267 | case SD_LBP_UNMAP: | |
1268 | return sd_setup_unmap_cmnd(cmd); | |
1269 | case SD_LBP_WS16: | |
02d26103 | 1270 | return sd_setup_write_same16_cmnd(cmd, true); |
81d926e8 CH |
1271 | case SD_LBP_WS10: |
1272 | return sd_setup_write_same10_cmnd(cmd, true); | |
1273 | case SD_LBP_ZERO: | |
1274 | return sd_setup_write_same10_cmnd(cmd, false); | |
1275 | default: | |
159b2cbf | 1276 | return BLK_STS_TARGET; |
81d926e8 | 1277 | } |
02d26103 CH |
1278 | case REQ_OP_WRITE_ZEROES: |
1279 | return sd_setup_write_zeroes_cmnd(cmd); | |
c2df40df | 1280 | case REQ_OP_WRITE_SAME: |
87949eee | 1281 | return sd_setup_write_same_cmnd(cmd); |
3a5e02ce | 1282 | case REQ_OP_FLUSH: |
87949eee | 1283 | return sd_setup_flush_cmnd(cmd); |
c2df40df MC |
1284 | case REQ_OP_READ: |
1285 | case REQ_OP_WRITE: | |
87949eee | 1286 | return sd_setup_read_write_cmnd(cmd); |
89d94756 HR |
1287 | case REQ_OP_ZONE_RESET: |
1288 | return sd_zbc_setup_reset_cmnd(cmd); | |
c2df40df | 1289 | default: |
f1f1fada | 1290 | WARN_ON_ONCE(1); |
159b2cbf | 1291 | return BLK_STS_NOTSUPP; |
c2df40df | 1292 | } |
87949eee CH |
1293 | } |
1294 | ||
1295 | static void sd_uninit_command(struct scsi_cmnd *SCpnt) | |
1296 | { | |
1297 | struct request *rq = SCpnt->request; | |
14e3062f | 1298 | u8 *cmnd; |
87949eee | 1299 | |
f9d03f96 | 1300 | if (rq->rq_flags & RQF_SPECIAL_PAYLOAD) |
61cce6f6 | 1301 | mempool_free(rq->special_vec.bv_page, sd_page_pool); |
87949eee | 1302 | |
82ed4db4 | 1303 | if (SCpnt->cmnd != scsi_req(rq)->cmd) { |
14e3062f | 1304 | cmnd = SCpnt->cmnd; |
87949eee CH |
1305 | SCpnt->cmnd = NULL; |
1306 | SCpnt->cmd_len = 0; | |
14e3062f | 1307 | mempool_free(cmnd, sd_cdb_pool); |
87949eee CH |
1308 | } |
1309 | } | |
1310 | ||
1da177e4 LT |
1311 | /** |
1312 | * sd_open - open a scsi disk device | |
7529fbb0 DLM |
1313 | * @bdev: Block device of the scsi disk to open |
1314 | * @mode: FMODE_* mask | |
1da177e4 LT |
1315 | * |
1316 | * Returns 0 if successful. Returns a negated errno value in case | |
1317 | * of error. | |
1318 | * | |
1319 | * Note: This can be called from a user context (e.g. fsck(1) ) | |
1320 | * or from within the kernel (e.g. as a result of a mount(1) ). | |
1321 | * In the latter case @inode and @filp carry an abridged amount | |
1322 | * of information as noted above. | |
409f3499 AB |
1323 | * |
1324 | * Locking: called with bdev->bd_mutex held. | |
1da177e4 | 1325 | **/ |
0338e291 | 1326 | static int sd_open(struct block_device *bdev, fmode_t mode) |
1da177e4 | 1327 | { |
0338e291 | 1328 | struct scsi_disk *sdkp = scsi_disk_get(bdev->bd_disk); |
1da177e4 LT |
1329 | struct scsi_device *sdev; |
1330 | int retval; | |
1331 | ||
0338e291 | 1332 | if (!sdkp) |
1da177e4 LT |
1333 | return -ENXIO; |
1334 | ||
fa0d34be | 1335 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_open\n")); |
1da177e4 LT |
1336 | |
1337 | sdev = sdkp->device; | |
1338 | ||
1339 | /* | |
1340 | * If the device is in error recovery, wait until it is done. | |
1341 | * If the device is offline, then disallow any access to it. | |
1342 | */ | |
1343 | retval = -ENXIO; | |
1344 | if (!scsi_block_when_processing_errors(sdev)) | |
1345 | goto error_out; | |
1346 | ||
1347 | if (sdev->removable || sdkp->write_prot) | |
0338e291 | 1348 | check_disk_change(bdev); |
1da177e4 LT |
1349 | |
1350 | /* | |
1351 | * If the drive is empty, just let the open fail. | |
1352 | */ | |
1353 | retval = -ENOMEDIUM; | |
0338e291 | 1354 | if (sdev->removable && !sdkp->media_present && !(mode & FMODE_NDELAY)) |
1da177e4 LT |
1355 | goto error_out; |
1356 | ||
1357 | /* | |
1358 | * If the device has the write protect tab set, have the open fail | |
1359 | * if the user expects to be able to write to the thing. | |
1360 | */ | |
1361 | retval = -EROFS; | |
0338e291 | 1362 | if (sdkp->write_prot && (mode & FMODE_WRITE)) |
1da177e4 LT |
1363 | goto error_out; |
1364 | ||
1365 | /* | |
1366 | * It is possible that the disk changing stuff resulted in | |
1367 | * the device being taken offline. If this is the case, | |
1368 | * report this to the user, and don't pretend that the | |
1369 | * open actually succeeded. | |
1370 | */ | |
1371 | retval = -ENXIO; | |
1372 | if (!scsi_device_online(sdev)) | |
1373 | goto error_out; | |
1374 | ||
409f3499 | 1375 | if ((atomic_inc_return(&sdkp->openers) == 1) && sdev->removable) { |
1da177e4 LT |
1376 | if (scsi_block_when_processing_errors(sdev)) |
1377 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT); | |
1378 | } | |
1379 | ||
1380 | return 0; | |
1381 | ||
1382 | error_out: | |
1383 | scsi_disk_put(sdkp); | |
1384 | return retval; | |
1385 | } | |
1386 | ||
1387 | /** | |
1388 | * sd_release - invoked when the (last) close(2) is called on this | |
1389 | * scsi disk. | |
7529fbb0 DLM |
1390 | * @disk: disk to release |
1391 | * @mode: FMODE_* mask | |
1da177e4 LT |
1392 | * |
1393 | * Returns 0. | |
1394 | * | |
1395 | * Note: may block (uninterruptible) if error recovery is underway | |
1396 | * on this disk. | |
409f3499 AB |
1397 | * |
1398 | * Locking: called with bdev->bd_mutex held. | |
1da177e4 | 1399 | **/ |
db2a144b | 1400 | static void sd_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 1401 | { |
1da177e4 LT |
1402 | struct scsi_disk *sdkp = scsi_disk(disk); |
1403 | struct scsi_device *sdev = sdkp->device; | |
1404 | ||
56937f7b | 1405 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_release\n")); |
1da177e4 | 1406 | |
7e443312 | 1407 | if (atomic_dec_return(&sdkp->openers) == 0 && sdev->removable) { |
1da177e4 LT |
1408 | if (scsi_block_when_processing_errors(sdev)) |
1409 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW); | |
1410 | } | |
1411 | ||
1412 | /* | |
1413 | * XXX and what if there are packets in flight and this close() | |
1414 | * XXX is followed by a "rmmod sd_mod"? | |
1415 | */ | |
478a8a05 | 1416 | |
1da177e4 | 1417 | scsi_disk_put(sdkp); |
1da177e4 LT |
1418 | } |
1419 | ||
a885c8c4 | 1420 | static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
1da177e4 LT |
1421 | { |
1422 | struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk); | |
1423 | struct scsi_device *sdp = sdkp->device; | |
1424 | struct Scsi_Host *host = sdp->host; | |
f08bb1e0 | 1425 | sector_t capacity = logical_to_sectors(sdp, sdkp->capacity); |
1da177e4 LT |
1426 | int diskinfo[4]; |
1427 | ||
1428 | /* default to most commonly used values */ | |
f08bb1e0 MP |
1429 | diskinfo[0] = 0x40; /* 1 << 6 */ |
1430 | diskinfo[1] = 0x20; /* 1 << 5 */ | |
1431 | diskinfo[2] = capacity >> 11; | |
1432 | ||
1da177e4 LT |
1433 | /* override with calculated, extended default, or driver values */ |
1434 | if (host->hostt->bios_param) | |
f08bb1e0 | 1435 | host->hostt->bios_param(sdp, bdev, capacity, diskinfo); |
1da177e4 | 1436 | else |
f08bb1e0 | 1437 | scsicam_bios_param(bdev, capacity, diskinfo); |
1da177e4 | 1438 | |
a885c8c4 CH |
1439 | geo->heads = diskinfo[0]; |
1440 | geo->sectors = diskinfo[1]; | |
1441 | geo->cylinders = diskinfo[2]; | |
1da177e4 LT |
1442 | return 0; |
1443 | } | |
1444 | ||
1445 | /** | |
1446 | * sd_ioctl - process an ioctl | |
7529fbb0 DLM |
1447 | * @bdev: target block device |
1448 | * @mode: FMODE_* mask | |
1da177e4 LT |
1449 | * @cmd: ioctl command number |
1450 | * @arg: this is third argument given to ioctl(2) system call. | |
1451 | * Often contains a pointer. | |
1452 | * | |
25985edc | 1453 | * Returns 0 if successful (some ioctls return positive numbers on |
1da177e4 LT |
1454 | * success as well). Returns a negated errno value in case of error. |
1455 | * | |
1456 | * Note: most ioctls are forward onto the block subsystem or further | |
3a4fa0a2 | 1457 | * down in the scsi subsystem. |
1da177e4 | 1458 | **/ |
0338e291 | 1459 | static int sd_ioctl(struct block_device *bdev, fmode_t mode, |
1da177e4 LT |
1460 | unsigned int cmd, unsigned long arg) |
1461 | { | |
1da177e4 | 1462 | struct gendisk *disk = bdev->bd_disk; |
fe2d1851 NN |
1463 | struct scsi_disk *sdkp = scsi_disk(disk); |
1464 | struct scsi_device *sdp = sdkp->device; | |
1da177e4 LT |
1465 | void __user *p = (void __user *)arg; |
1466 | int error; | |
1467 | ||
fe2d1851 NN |
1468 | SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO, sdkp, "sd_ioctl: disk=%s, " |
1469 | "cmd=0x%x\n", disk->disk_name, cmd)); | |
1da177e4 | 1470 | |
0bfc96cb PB |
1471 | error = scsi_verify_blk_ioctl(bdev, cmd); |
1472 | if (error < 0) | |
1473 | return error; | |
1474 | ||
1da177e4 LT |
1475 | /* |
1476 | * If we are in the middle of error recovery, don't let anyone | |
1477 | * else try and use this device. Also, if error recovery fails, it | |
1478 | * may try and take the device offline, in which case all further | |
1479 | * access to the device is prohibited. | |
1480 | */ | |
906d15fb CH |
1481 | error = scsi_ioctl_block_when_processing_errors(sdp, cmd, |
1482 | (mode & FMODE_NDELAY) != 0); | |
1483 | if (error) | |
8a6cfeb6 | 1484 | goto out; |
1da177e4 | 1485 | |
d80210f2 CH |
1486 | if (is_sed_ioctl(cmd)) |
1487 | return sed_ioctl(sdkp->opal_dev, cmd, p); | |
1488 | ||
1da177e4 LT |
1489 | /* |
1490 | * Send SCSI addressing ioctls directly to mid level, send other | |
1491 | * ioctls to block level and then onto mid level if they can't be | |
1492 | * resolved. | |
1493 | */ | |
1494 | switch (cmd) { | |
1495 | case SCSI_IOCTL_GET_IDLUN: | |
1496 | case SCSI_IOCTL_GET_BUS_NUMBER: | |
8a6cfeb6 AB |
1497 | error = scsi_ioctl(sdp, cmd, p); |
1498 | break; | |
1da177e4 | 1499 | default: |
577ebb37 | 1500 | error = scsi_cmd_blk_ioctl(bdev, mode, cmd, p); |
1da177e4 | 1501 | if (error != -ENOTTY) |
8a6cfeb6 AB |
1502 | break; |
1503 | error = scsi_ioctl(sdp, cmd, p); | |
1504 | break; | |
1da177e4 | 1505 | } |
8a6cfeb6 | 1506 | out: |
8a6cfeb6 | 1507 | return error; |
1da177e4 LT |
1508 | } |
1509 | ||
1510 | static void set_media_not_present(struct scsi_disk *sdkp) | |
1511 | { | |
2bae0093 TH |
1512 | if (sdkp->media_present) |
1513 | sdkp->device->changed = 1; | |
1514 | ||
1515 | if (sdkp->device->removable) { | |
1516 | sdkp->media_present = 0; | |
1517 | sdkp->capacity = 0; | |
1518 | } | |
1519 | } | |
1520 | ||
1521 | static int media_not_present(struct scsi_disk *sdkp, | |
1522 | struct scsi_sense_hdr *sshdr) | |
1523 | { | |
1524 | if (!scsi_sense_valid(sshdr)) | |
1525 | return 0; | |
1526 | ||
1527 | /* not invoked for commands that could return deferred errors */ | |
1528 | switch (sshdr->sense_key) { | |
1529 | case UNIT_ATTENTION: | |
1530 | case NOT_READY: | |
1531 | /* medium not present */ | |
1532 | if (sshdr->asc == 0x3A) { | |
1533 | set_media_not_present(sdkp); | |
1534 | return 1; | |
1535 | } | |
1536 | } | |
1537 | return 0; | |
1da177e4 LT |
1538 | } |
1539 | ||
1540 | /** | |
2bae0093 TH |
1541 | * sd_check_events - check media events |
1542 | * @disk: kernel device descriptor | |
1543 | * @clearing: disk events currently being cleared | |
1da177e4 | 1544 | * |
2bae0093 | 1545 | * Returns mask of DISK_EVENT_*. |
1da177e4 LT |
1546 | * |
1547 | * Note: this function is invoked from the block subsystem. | |
1548 | **/ | |
2bae0093 | 1549 | static unsigned int sd_check_events(struct gendisk *disk, unsigned int clearing) |
1da177e4 | 1550 | { |
eb72d0bb HR |
1551 | struct scsi_disk *sdkp = scsi_disk_get(disk); |
1552 | struct scsi_device *sdp; | |
1da177e4 LT |
1553 | int retval; |
1554 | ||
eb72d0bb HR |
1555 | if (!sdkp) |
1556 | return 0; | |
1557 | ||
1558 | sdp = sdkp->device; | |
2bae0093 | 1559 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_check_events\n")); |
1da177e4 LT |
1560 | |
1561 | /* | |
1562 | * If the device is offline, don't send any commands - just pretend as | |
1563 | * if the command failed. If the device ever comes back online, we | |
1564 | * can deal with it then. It is only because of unrecoverable errors | |
1565 | * that we would ever take a device offline in the first place. | |
1566 | */ | |
285e9670 KS |
1567 | if (!scsi_device_online(sdp)) { |
1568 | set_media_not_present(sdkp); | |
285e9670 KS |
1569 | goto out; |
1570 | } | |
1da177e4 LT |
1571 | |
1572 | /* | |
1573 | * Using TEST_UNIT_READY enables differentiation between drive with | |
1574 | * no cartridge loaded - NOT READY, drive with changed cartridge - | |
1575 | * UNIT ATTENTION, or with same cartridge - GOOD STATUS. | |
1576 | * | |
1577 | * Drives that auto spin down. eg iomega jaz 1G, will be started | |
1578 | * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever | |
1579 | * sd_revalidate() is called. | |
1580 | */ | |
001aac25 | 1581 | if (scsi_block_when_processing_errors(sdp)) { |
6fa2b8f9 CH |
1582 | struct scsi_sense_hdr sshdr = { 0, }; |
1583 | ||
001aac25 | 1584 | retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, SD_MAX_RETRIES, |
6fa2b8f9 | 1585 | &sshdr); |
1da177e4 | 1586 | |
6fa2b8f9 CH |
1587 | /* failed to execute TUR, assume media not present */ |
1588 | if (host_byte(retval)) { | |
1589 | set_media_not_present(sdkp); | |
1590 | goto out; | |
1591 | } | |
1da177e4 | 1592 | |
6fa2b8f9 CH |
1593 | if (media_not_present(sdkp, &sshdr)) |
1594 | goto out; | |
1595 | } | |
2bae0093 | 1596 | |
1da177e4 LT |
1597 | /* |
1598 | * For removable scsi disk we have to recognise the presence | |
2bae0093 | 1599 | * of a disk in the drive. |
1da177e4 | 1600 | */ |
2bae0093 TH |
1601 | if (!sdkp->media_present) |
1602 | sdp->changed = 1; | |
1da177e4 | 1603 | sdkp->media_present = 1; |
285e9670 | 1604 | out: |
3ff5588d | 1605 | /* |
2bae0093 | 1606 | * sdp->changed is set under the following conditions: |
3ff5588d | 1607 | * |
2bae0093 TH |
1608 | * Medium present state has changed in either direction. |
1609 | * Device has indicated UNIT_ATTENTION. | |
3ff5588d | 1610 | */ |
2bae0093 TH |
1611 | retval = sdp->changed ? DISK_EVENT_MEDIA_CHANGE : 0; |
1612 | sdp->changed = 0; | |
eb72d0bb | 1613 | scsi_disk_put(sdkp); |
1da177e4 | 1614 | return retval; |
1da177e4 LT |
1615 | } |
1616 | ||
4fa83244 | 1617 | static int sd_sync_cache(struct scsi_disk *sdkp, struct scsi_sense_hdr *sshdr) |
1da177e4 | 1618 | { |
1da177e4 | 1619 | int retries, res; |
e73aec82 | 1620 | struct scsi_device *sdp = sdkp->device; |
7e660100 JB |
1621 | const int timeout = sdp->request_queue->rq_timeout |
1622 | * SD_FLUSH_TIMEOUT_MULTIPLIER; | |
4fa83244 | 1623 | struct scsi_sense_hdr my_sshdr; |
1da177e4 LT |
1624 | |
1625 | if (!scsi_device_online(sdp)) | |
1626 | return -ENODEV; | |
1627 | ||
4fa83244 DB |
1628 | /* caller might not be interested in sense, but we need it */ |
1629 | if (!sshdr) | |
1630 | sshdr = &my_sshdr; | |
1631 | ||
1da177e4 LT |
1632 | for (retries = 3; retries > 0; --retries) { |
1633 | unsigned char cmd[10] = { 0 }; | |
1634 | ||
1635 | cmd[0] = SYNCHRONIZE_CACHE; | |
1636 | /* | |
1637 | * Leave the rest of the command zero to indicate | |
1638 | * flush everything. | |
1639 | */ | |
4fa83244 | 1640 | res = scsi_execute(sdp, cmd, DMA_NONE, NULL, 0, NULL, sshdr, |
fcbfffe2 | 1641 | timeout, SD_MAX_RETRIES, 0, RQF_PM, NULL); |
ea73a9f2 | 1642 | if (res == 0) |
1da177e4 LT |
1643 | break; |
1644 | } | |
1645 | ||
e73aec82 | 1646 | if (res) { |
ef61329d | 1647 | sd_print_result(sdkp, "Synchronize Cache(10) failed", res); |
95897910 | 1648 | |
c65be1a6 | 1649 | if (driver_byte(res) == DRIVER_SENSE) |
4fa83244 DB |
1650 | sd_print_sense_hdr(sdkp, sshdr); |
1651 | ||
95897910 | 1652 | /* we need to evaluate the error return */ |
4fa83244 DB |
1653 | if (scsi_sense_valid(sshdr) && |
1654 | (sshdr->asc == 0x3a || /* medium not present */ | |
1655 | sshdr->asc == 0x20)) /* invalid command */ | |
95897910 ON |
1656 | /* this is no error here */ |
1657 | return 0; | |
1658 | ||
1659 | switch (host_byte(res)) { | |
1660 | /* ignore errors due to racing a disconnection */ | |
1661 | case DID_BAD_TARGET: | |
1662 | case DID_NO_CONNECT: | |
1663 | return 0; | |
1664 | /* signal the upper layer it might try again */ | |
1665 | case DID_BUS_BUSY: | |
1666 | case DID_IMM_RETRY: | |
1667 | case DID_REQUEUE: | |
1668 | case DID_SOFT_ERROR: | |
1669 | return -EBUSY; | |
1670 | default: | |
1671 | return -EIO; | |
1672 | } | |
1da177e4 | 1673 | } |
3721050a | 1674 | return 0; |
1da177e4 LT |
1675 | } |
1676 | ||
1da177e4 LT |
1677 | static void sd_rescan(struct device *dev) |
1678 | { | |
3d9a1f53 | 1679 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
39b7f1e2 | 1680 | |
3d9a1f53 | 1681 | revalidate_disk(sdkp->disk); |
1da177e4 LT |
1682 | } |
1683 | ||
1684 | ||
1685 | #ifdef CONFIG_COMPAT | |
1686 | /* | |
1687 | * This gets directly called from VFS. When the ioctl | |
1688 | * is not recognized we go back to the other translation paths. | |
1689 | */ | |
0338e291 AV |
1690 | static int sd_compat_ioctl(struct block_device *bdev, fmode_t mode, |
1691 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1692 | { |
0338e291 | 1693 | struct scsi_device *sdev = scsi_disk(bdev->bd_disk)->device; |
21a9d4c9 | 1694 | int error; |
1da177e4 | 1695 | |
21a9d4c9 CH |
1696 | error = scsi_ioctl_block_when_processing_errors(sdev, cmd, |
1697 | (mode & FMODE_NDELAY) != 0); | |
1698 | if (error) | |
1699 | return error; | |
1da177e4 | 1700 | |
1da177e4 LT |
1701 | /* |
1702 | * Let the static ioctl translation table take care of it. | |
1703 | */ | |
21a9d4c9 CH |
1704 | if (!sdev->host->hostt->compat_ioctl) |
1705 | return -ENOIOCTLCMD; | |
1706 | return sdev->host->hostt->compat_ioctl(sdev, cmd, (void __user *)arg); | |
1da177e4 LT |
1707 | } |
1708 | #endif | |
1709 | ||
924d55b0 CH |
1710 | static char sd_pr_type(enum pr_type type) |
1711 | { | |
1712 | switch (type) { | |
1713 | case PR_WRITE_EXCLUSIVE: | |
1714 | return 0x01; | |
1715 | case PR_EXCLUSIVE_ACCESS: | |
1716 | return 0x03; | |
1717 | case PR_WRITE_EXCLUSIVE_REG_ONLY: | |
1718 | return 0x05; | |
1719 | case PR_EXCLUSIVE_ACCESS_REG_ONLY: | |
1720 | return 0x06; | |
1721 | case PR_WRITE_EXCLUSIVE_ALL_REGS: | |
1722 | return 0x07; | |
1723 | case PR_EXCLUSIVE_ACCESS_ALL_REGS: | |
1724 | return 0x08; | |
1725 | default: | |
1726 | return 0; | |
1727 | } | |
1728 | }; | |
1729 | ||
1730 | static int sd_pr_command(struct block_device *bdev, u8 sa, | |
1731 | u64 key, u64 sa_key, u8 type, u8 flags) | |
1732 | { | |
1733 | struct scsi_device *sdev = scsi_disk(bdev->bd_disk)->device; | |
1734 | struct scsi_sense_hdr sshdr; | |
1735 | int result; | |
1736 | u8 cmd[16] = { 0, }; | |
1737 | u8 data[24] = { 0, }; | |
1738 | ||
1739 | cmd[0] = PERSISTENT_RESERVE_OUT; | |
1740 | cmd[1] = sa; | |
1741 | cmd[2] = type; | |
1742 | put_unaligned_be32(sizeof(data), &cmd[5]); | |
1743 | ||
1744 | put_unaligned_be64(key, &data[0]); | |
1745 | put_unaligned_be64(sa_key, &data[8]); | |
1746 | data[20] = flags; | |
1747 | ||
1748 | result = scsi_execute_req(sdev, cmd, DMA_TO_DEVICE, &data, sizeof(data), | |
1749 | &sshdr, SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
1750 | ||
c65be1a6 JT |
1751 | if (driver_byte(result) == DRIVER_SENSE && |
1752 | scsi_sense_valid(&sshdr)) { | |
924d55b0 CH |
1753 | sdev_printk(KERN_INFO, sdev, "PR command failed: %d\n", result); |
1754 | scsi_print_sense_hdr(sdev, NULL, &sshdr); | |
1755 | } | |
1756 | ||
1757 | return result; | |
1758 | } | |
1759 | ||
1760 | static int sd_pr_register(struct block_device *bdev, u64 old_key, u64 new_key, | |
1761 | u32 flags) | |
1762 | { | |
1763 | if (flags & ~PR_FL_IGNORE_KEY) | |
1764 | return -EOPNOTSUPP; | |
1765 | return sd_pr_command(bdev, (flags & PR_FL_IGNORE_KEY) ? 0x06 : 0x00, | |
1766 | old_key, new_key, 0, | |
01f90dd9 | 1767 | (1 << 0) /* APTPL */); |
924d55b0 CH |
1768 | } |
1769 | ||
1770 | static int sd_pr_reserve(struct block_device *bdev, u64 key, enum pr_type type, | |
1771 | u32 flags) | |
1772 | { | |
1773 | if (flags) | |
1774 | return -EOPNOTSUPP; | |
1775 | return sd_pr_command(bdev, 0x01, key, 0, sd_pr_type(type), 0); | |
1776 | } | |
1777 | ||
1778 | static int sd_pr_release(struct block_device *bdev, u64 key, enum pr_type type) | |
1779 | { | |
1780 | return sd_pr_command(bdev, 0x02, key, 0, sd_pr_type(type), 0); | |
1781 | } | |
1782 | ||
1783 | static int sd_pr_preempt(struct block_device *bdev, u64 old_key, u64 new_key, | |
1784 | enum pr_type type, bool abort) | |
1785 | { | |
1786 | return sd_pr_command(bdev, abort ? 0x05 : 0x04, old_key, new_key, | |
1787 | sd_pr_type(type), 0); | |
1788 | } | |
1789 | ||
1790 | static int sd_pr_clear(struct block_device *bdev, u64 key) | |
1791 | { | |
1792 | return sd_pr_command(bdev, 0x03, key, 0, 0, 0); | |
1793 | } | |
1794 | ||
1795 | static const struct pr_ops sd_pr_ops = { | |
1796 | .pr_register = sd_pr_register, | |
1797 | .pr_reserve = sd_pr_reserve, | |
1798 | .pr_release = sd_pr_release, | |
1799 | .pr_preempt = sd_pr_preempt, | |
1800 | .pr_clear = sd_pr_clear, | |
1801 | }; | |
1802 | ||
83d5cde4 | 1803 | static const struct block_device_operations sd_fops = { |
1da177e4 | 1804 | .owner = THIS_MODULE, |
0338e291 AV |
1805 | .open = sd_open, |
1806 | .release = sd_release, | |
8a6cfeb6 | 1807 | .ioctl = sd_ioctl, |
a885c8c4 | 1808 | .getgeo = sd_getgeo, |
1da177e4 | 1809 | #ifdef CONFIG_COMPAT |
0338e291 | 1810 | .compat_ioctl = sd_compat_ioctl, |
1da177e4 | 1811 | #endif |
2bae0093 | 1812 | .check_events = sd_check_events, |
1da177e4 | 1813 | .revalidate_disk = sd_revalidate_disk, |
72ec24bd | 1814 | .unlock_native_capacity = sd_unlock_native_capacity, |
e76239a3 | 1815 | .report_zones = sd_zbc_report_zones, |
924d55b0 | 1816 | .pr_ops = &sd_pr_ops, |
1da177e4 LT |
1817 | }; |
1818 | ||
7a38dc0b HR |
1819 | /** |
1820 | * sd_eh_reset - reset error handling callback | |
1821 | * @scmd: sd-issued command that has failed | |
1822 | * | |
1823 | * This function is called by the SCSI midlayer before starting | |
1824 | * SCSI EH. When counting medium access failures we have to be | |
1825 | * careful to register it only only once per device and SCSI EH run; | |
1826 | * there might be several timed out commands which will cause the | |
1827 | * 'max_medium_access_timeouts' counter to trigger after the first | |
1828 | * SCSI EH run already and set the device to offline. | |
1829 | * So this function resets the internal counter before starting SCSI EH. | |
1830 | **/ | |
1831 | static void sd_eh_reset(struct scsi_cmnd *scmd) | |
1832 | { | |
1833 | struct scsi_disk *sdkp = scsi_disk(scmd->request->rq_disk); | |
1834 | ||
1835 | /* New SCSI EH run, reset gate variable */ | |
1836 | sdkp->ignore_medium_access_errors = false; | |
1837 | } | |
1838 | ||
18a4d0a2 MP |
1839 | /** |
1840 | * sd_eh_action - error handling callback | |
1841 | * @scmd: sd-issued command that has failed | |
18a4d0a2 MP |
1842 | * @eh_disp: The recovery disposition suggested by the midlayer |
1843 | * | |
2451079b JB |
1844 | * This function is called by the SCSI midlayer upon completion of an |
1845 | * error test command (currently TEST UNIT READY). The result of sending | |
1846 | * the eh command is passed in eh_disp. We're looking for devices that | |
1847 | * fail medium access commands but are OK with non access commands like | |
1848 | * test unit ready (so wrongly see the device as having a successful | |
1849 | * recovery) | |
18a4d0a2 | 1850 | **/ |
2451079b | 1851 | static int sd_eh_action(struct scsi_cmnd *scmd, int eh_disp) |
18a4d0a2 MP |
1852 | { |
1853 | struct scsi_disk *sdkp = scsi_disk(scmd->request->rq_disk); | |
0db6ca8a | 1854 | struct scsi_device *sdev = scmd->device; |
18a4d0a2 | 1855 | |
0db6ca8a | 1856 | if (!scsi_device_online(sdev) || |
2451079b JB |
1857 | !scsi_medium_access_command(scmd) || |
1858 | host_byte(scmd->result) != DID_TIME_OUT || | |
1859 | eh_disp != SUCCESS) | |
18a4d0a2 MP |
1860 | return eh_disp; |
1861 | ||
1862 | /* | |
1863 | * The device has timed out executing a medium access command. | |
1864 | * However, the TEST UNIT READY command sent during error | |
1865 | * handling completed successfully. Either the device is in the | |
1866 | * process of recovering or has it suffered an internal failure | |
1867 | * that prevents access to the storage medium. | |
1868 | */ | |
7a38dc0b HR |
1869 | if (!sdkp->ignore_medium_access_errors) { |
1870 | sdkp->medium_access_timed_out++; | |
1871 | sdkp->ignore_medium_access_errors = true; | |
1872 | } | |
18a4d0a2 MP |
1873 | |
1874 | /* | |
1875 | * If the device keeps failing read/write commands but TEST UNIT | |
1876 | * READY always completes successfully we assume that medium | |
1877 | * access is no longer possible and take the device offline. | |
1878 | */ | |
1879 | if (sdkp->medium_access_timed_out >= sdkp->max_medium_access_timeouts) { | |
1880 | scmd_printk(KERN_ERR, scmd, | |
1881 | "Medium access timeout failure. Offlining disk!\n"); | |
0db6ca8a BVA |
1882 | mutex_lock(&sdev->state_mutex); |
1883 | scsi_device_set_state(sdev, SDEV_OFFLINE); | |
1884 | mutex_unlock(&sdev->state_mutex); | |
18a4d0a2 | 1885 | |
e8f8d50e | 1886 | return SUCCESS; |
18a4d0a2 MP |
1887 | } |
1888 | ||
1889 | return eh_disp; | |
1890 | } | |
1891 | ||
af55ff67 MP |
1892 | static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd) |
1893 | { | |
6eadc612 DLM |
1894 | struct request *req = scmd->request; |
1895 | struct scsi_device *sdev = scmd->device; | |
1896 | unsigned int transferred, good_bytes; | |
1897 | u64 start_lba, end_lba, bad_lba; | |
1898 | ||
a8733c7b | 1899 | /* |
6eadc612 DLM |
1900 | * Some commands have a payload smaller than the device logical |
1901 | * block size (e.g. INQUIRY on a 4K disk). | |
a8733c7b | 1902 | */ |
6eadc612 | 1903 | if (scsi_bufflen(scmd) <= sdev->sector_size) |
af55ff67 MP |
1904 | return 0; |
1905 | ||
6eadc612 DLM |
1906 | /* Check if we have a 'bad_lba' information */ |
1907 | if (!scsi_get_sense_info_fld(scmd->sense_buffer, | |
1908 | SCSI_SENSE_BUFFERSIZE, | |
1909 | &bad_lba)) | |
af55ff67 MP |
1910 | return 0; |
1911 | ||
6eadc612 DLM |
1912 | /* |
1913 | * If the bad lba was reported incorrectly, we have no idea where | |
af55ff67 MP |
1914 | * the error is. |
1915 | */ | |
6eadc612 DLM |
1916 | start_lba = sectors_to_logical(sdev, blk_rq_pos(req)); |
1917 | end_lba = start_lba + bytes_to_logical(sdev, scsi_bufflen(scmd)); | |
1918 | if (bad_lba < start_lba || bad_lba >= end_lba) | |
af55ff67 MP |
1919 | return 0; |
1920 | ||
6eadc612 DLM |
1921 | /* |
1922 | * resid is optional but mostly filled in. When it's unused, | |
1923 | * its value is zero, so we assume the whole buffer transferred | |
af55ff67 | 1924 | */ |
6eadc612 DLM |
1925 | transferred = scsi_bufflen(scmd) - scsi_get_resid(scmd); |
1926 | ||
1927 | /* This computation should always be done in terms of the | |
1928 | * resolution of the device's medium. | |
af55ff67 | 1929 | */ |
6eadc612 DLM |
1930 | good_bytes = logical_to_bytes(sdev, bad_lba - start_lba); |
1931 | ||
a8733c7b | 1932 | return min(good_bytes, transferred); |
af55ff67 MP |
1933 | } |
1934 | ||
1da177e4 | 1935 | /** |
7b3d9545 | 1936 | * sd_done - bottom half handler: called when the lower level |
1da177e4 LT |
1937 | * driver has completed (successfully or otherwise) a scsi command. |
1938 | * @SCpnt: mid-level's per command structure. | |
1939 | * | |
1940 | * Note: potentially run from within an ISR. Must not block. | |
1941 | **/ | |
7b3d9545 | 1942 | static int sd_done(struct scsi_cmnd *SCpnt) |
1da177e4 LT |
1943 | { |
1944 | int result = SCpnt->result; | |
af55ff67 | 1945 | unsigned int good_bytes = result ? 0 : scsi_bufflen(SCpnt); |
c46f0917 DLM |
1946 | unsigned int sector_size = SCpnt->device->sector_size; |
1947 | unsigned int resid; | |
1da177e4 | 1948 | struct scsi_sense_hdr sshdr; |
4e7392ec | 1949 | struct scsi_disk *sdkp = scsi_disk(SCpnt->request->rq_disk); |
26e85fcd | 1950 | struct request *req = SCpnt->request; |
1da177e4 LT |
1951 | int sense_valid = 0; |
1952 | int sense_deferred = 0; | |
1da177e4 | 1953 | |
89d94756 HR |
1954 | switch (req_op(req)) { |
1955 | case REQ_OP_DISCARD: | |
02d26103 | 1956 | case REQ_OP_WRITE_ZEROES: |
89d94756 HR |
1957 | case REQ_OP_WRITE_SAME: |
1958 | case REQ_OP_ZONE_RESET: | |
26e85fcd MP |
1959 | if (!result) { |
1960 | good_bytes = blk_rq_bytes(req); | |
1961 | scsi_set_resid(SCpnt, 0); | |
1962 | } else { | |
1963 | good_bytes = 0; | |
1964 | scsi_set_resid(SCpnt, blk_rq_bytes(req)); | |
89d94756 HR |
1965 | } |
1966 | break; | |
c46f0917 DLM |
1967 | default: |
1968 | /* | |
1969 | * In case of bogus fw or device, we could end up having | |
1970 | * an unaligned partial completion. Check this here and force | |
1971 | * alignment. | |
1972 | */ | |
1973 | resid = scsi_get_resid(SCpnt); | |
1974 | if (resid & (sector_size - 1)) { | |
1975 | sd_printk(KERN_INFO, sdkp, | |
1976 | "Unaligned partial completion (resid=%u, sector_sz=%u)\n", | |
1977 | resid, sector_size); | |
1978 | resid = min(scsi_bufflen(SCpnt), | |
1979 | round_up(resid, sector_size)); | |
1980 | scsi_set_resid(SCpnt, resid); | |
1981 | } | |
26e85fcd | 1982 | } |
6a32a8ae | 1983 | |
1da177e4 LT |
1984 | if (result) { |
1985 | sense_valid = scsi_command_normalize_sense(SCpnt, &sshdr); | |
1986 | if (sense_valid) | |
1987 | sense_deferred = scsi_sense_is_deferred(&sshdr); | |
1988 | } | |
2a863ba8 DJ |
1989 | sdkp->medium_access_timed_out = 0; |
1990 | ||
03aba2f7 LT |
1991 | if (driver_byte(result) != DRIVER_SENSE && |
1992 | (!sense_valid || sense_deferred)) | |
1993 | goto out; | |
1994 | ||
1995 | switch (sshdr.sense_key) { | |
1996 | case HARDWARE_ERROR: | |
1997 | case MEDIUM_ERROR: | |
af55ff67 | 1998 | good_bytes = sd_completed_bytes(SCpnt); |
03aba2f7 LT |
1999 | break; |
2000 | case RECOVERED_ERROR: | |
af55ff67 MP |
2001 | good_bytes = scsi_bufflen(SCpnt); |
2002 | break; | |
10dab226 JW |
2003 | case NO_SENSE: |
2004 | /* This indicates a false check condition, so ignore it. An | |
2005 | * unknown amount of data was transferred so treat it as an | |
2006 | * error. | |
2007 | */ | |
10dab226 JW |
2008 | SCpnt->result = 0; |
2009 | memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); | |
2010 | break; | |
c98a0eb0 MP |
2011 | case ABORTED_COMMAND: |
2012 | if (sshdr.asc == 0x10) /* DIF: Target detected corruption */ | |
2013 | good_bytes = sd_completed_bytes(SCpnt); | |
2014 | break; | |
2015 | case ILLEGAL_REQUEST: | |
d227ec26 CH |
2016 | switch (sshdr.asc) { |
2017 | case 0x10: /* DIX: Host detected corruption */ | |
af55ff67 | 2018 | good_bytes = sd_completed_bytes(SCpnt); |
d227ec26 CH |
2019 | break; |
2020 | case 0x20: /* INVALID COMMAND OPCODE */ | |
2021 | case 0x24: /* INVALID FIELD IN CDB */ | |
2022 | switch (SCpnt->cmnd[0]) { | |
5db44863 MP |
2023 | case UNMAP: |
2024 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
2025 | break; | |
2026 | case WRITE_SAME_16: | |
2027 | case WRITE_SAME: | |
d227ec26 | 2028 | if (SCpnt->cmnd[1] & 8) { /* UNMAP */ |
5db44863 | 2029 | sd_config_discard(sdkp, SD_LBP_DISABLE); |
d227ec26 | 2030 | } else { |
5db44863 MP |
2031 | sdkp->device->no_write_same = 1; |
2032 | sd_config_write_same(sdkp); | |
e8064021 | 2033 | req->rq_flags |= RQF_QUIET; |
5db44863 | 2034 | } |
d227ec26 | 2035 | break; |
5db44863 MP |
2036 | } |
2037 | } | |
03aba2f7 LT |
2038 | break; |
2039 | default: | |
2040 | break; | |
1da177e4 | 2041 | } |
89d94756 | 2042 | |
03aba2f7 | 2043 | out: |
89d94756 HR |
2044 | if (sd_is_zoned(sdkp)) |
2045 | sd_zbc_complete(SCpnt, good_bytes, &sshdr); | |
2046 | ||
ef61329d HR |
2047 | SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO, SCpnt, |
2048 | "sd_done: completed %d of %d bytes\n", | |
2049 | good_bytes, scsi_bufflen(SCpnt))); | |
2050 | ||
10c41ddd MG |
2051 | if (rq_data_dir(SCpnt->request) == READ && scsi_prot_sg_count(SCpnt) && |
2052 | good_bytes) | |
2053 | t10_pi_complete(SCpnt->request, sdkp->protection_type, | |
2054 | good_bytes / scsi_prot_interval(SCpnt)); | |
af55ff67 | 2055 | |
7b3d9545 | 2056 | return good_bytes; |
1da177e4 LT |
2057 | } |
2058 | ||
1da177e4 LT |
2059 | /* |
2060 | * spinup disk - called only in sd_revalidate_disk() | |
2061 | */ | |
2062 | static void | |
e73aec82 | 2063 | sd_spinup_disk(struct scsi_disk *sdkp) |
ea73a9f2 | 2064 | { |
1da177e4 | 2065 | unsigned char cmd[10]; |
4451e472 | 2066 | unsigned long spintime_expire = 0; |
1da177e4 LT |
2067 | int retries, spintime; |
2068 | unsigned int the_result; | |
2069 | struct scsi_sense_hdr sshdr; | |
2070 | int sense_valid = 0; | |
2071 | ||
2072 | spintime = 0; | |
2073 | ||
2074 | /* Spin up drives, as required. Only do this at boot time */ | |
2075 | /* Spinup needs to be done for module loads too. */ | |
2076 | do { | |
2077 | retries = 0; | |
2078 | ||
2079 | do { | |
2080 | cmd[0] = TEST_UNIT_READY; | |
2081 | memset((void *) &cmd[1], 0, 9); | |
2082 | ||
ea73a9f2 JB |
2083 | the_result = scsi_execute_req(sdkp->device, cmd, |
2084 | DMA_NONE, NULL, 0, | |
2085 | &sshdr, SD_TIMEOUT, | |
f4f4e47e | 2086 | SD_MAX_RETRIES, NULL); |
1da177e4 | 2087 | |
b4d38e38 AS |
2088 | /* |
2089 | * If the drive has indicated to us that it | |
2090 | * doesn't have any media in it, don't bother | |
2091 | * with any more polling. | |
2092 | */ | |
2093 | if (media_not_present(sdkp, &sshdr)) | |
2094 | return; | |
2095 | ||
1da177e4 | 2096 | if (the_result) |
ea73a9f2 | 2097 | sense_valid = scsi_sense_valid(&sshdr); |
1da177e4 LT |
2098 | retries++; |
2099 | } while (retries < 3 && | |
2100 | (!scsi_status_is_good(the_result) || | |
c65be1a6 | 2101 | ((driver_byte(the_result) == DRIVER_SENSE) && |
1da177e4 LT |
2102 | sense_valid && sshdr.sense_key == UNIT_ATTENTION))); |
2103 | ||
c65be1a6 | 2104 | if (driver_byte(the_result) != DRIVER_SENSE) { |
1da177e4 LT |
2105 | /* no sense, TUR either succeeded or failed |
2106 | * with a status error */ | |
e73aec82 | 2107 | if(!spintime && !scsi_status_is_good(the_result)) { |
ef61329d HR |
2108 | sd_print_result(sdkp, "Test Unit Ready failed", |
2109 | the_result); | |
e73aec82 | 2110 | } |
1da177e4 LT |
2111 | break; |
2112 | } | |
ef61329d | 2113 | |
1da177e4 LT |
2114 | /* |
2115 | * The device does not want the automatic start to be issued. | |
2116 | */ | |
33dd6f92 | 2117 | if (sdkp->device->no_start_on_add) |
1da177e4 | 2118 | break; |
1da177e4 | 2119 | |
33dd6f92 MW |
2120 | if (sense_valid && sshdr.sense_key == NOT_READY) { |
2121 | if (sshdr.asc == 4 && sshdr.ascq == 3) | |
2122 | break; /* manual intervention required */ | |
2123 | if (sshdr.asc == 4 && sshdr.ascq == 0xb) | |
2124 | break; /* standby */ | |
2125 | if (sshdr.asc == 4 && sshdr.ascq == 0xc) | |
2126 | break; /* unavailable */ | |
505aa4b6 MR |
2127 | if (sshdr.asc == 4 && sshdr.ascq == 0x1b) |
2128 | break; /* sanitize in progress */ | |
33dd6f92 MW |
2129 | /* |
2130 | * Issue command to spin up drive when not ready | |
2131 | */ | |
1da177e4 | 2132 | if (!spintime) { |
e73aec82 | 2133 | sd_printk(KERN_NOTICE, sdkp, "Spinning up disk..."); |
1da177e4 LT |
2134 | cmd[0] = START_STOP; |
2135 | cmd[1] = 1; /* Return immediately */ | |
2136 | memset((void *) &cmd[2], 0, 8); | |
2137 | cmd[4] = 1; /* Start spin cycle */ | |
d2886ea3 SR |
2138 | if (sdkp->device->start_stop_pwr_cond) |
2139 | cmd[4] |= 1 << 4; | |
ea73a9f2 JB |
2140 | scsi_execute_req(sdkp->device, cmd, DMA_NONE, |
2141 | NULL, 0, &sshdr, | |
f4f4e47e FT |
2142 | SD_TIMEOUT, SD_MAX_RETRIES, |
2143 | NULL); | |
4451e472 AS |
2144 | spintime_expire = jiffies + 100 * HZ; |
2145 | spintime = 1; | |
1da177e4 | 2146 | } |
1da177e4 LT |
2147 | /* Wait 1 second for next try */ |
2148 | msleep(1000); | |
3a1d0783 | 2149 | printk(KERN_CONT "."); |
4451e472 AS |
2150 | |
2151 | /* | |
2152 | * Wait for USB flash devices with slow firmware. | |
2153 | * Yes, this sense key/ASC combination shouldn't | |
2154 | * occur here. It's characteristic of these devices. | |
2155 | */ | |
2156 | } else if (sense_valid && | |
2157 | sshdr.sense_key == UNIT_ATTENTION && | |
2158 | sshdr.asc == 0x28) { | |
2159 | if (!spintime) { | |
2160 | spintime_expire = jiffies + 5 * HZ; | |
2161 | spintime = 1; | |
2162 | } | |
2163 | /* Wait 1 second for next try */ | |
2164 | msleep(1000); | |
1da177e4 LT |
2165 | } else { |
2166 | /* we don't understand the sense code, so it's | |
2167 | * probably pointless to loop */ | |
2168 | if(!spintime) { | |
e73aec82 MP |
2169 | sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n"); |
2170 | sd_print_sense_hdr(sdkp, &sshdr); | |
1da177e4 LT |
2171 | } |
2172 | break; | |
2173 | } | |
2174 | ||
4451e472 | 2175 | } while (spintime && time_before_eq(jiffies, spintime_expire)); |
1da177e4 LT |
2176 | |
2177 | if (spintime) { | |
2178 | if (scsi_status_is_good(the_result)) | |
3a1d0783 | 2179 | printk(KERN_CONT "ready\n"); |
1da177e4 | 2180 | else |
3a1d0783 | 2181 | printk(KERN_CONT "not responding...\n"); |
1da177e4 LT |
2182 | } |
2183 | } | |
2184 | ||
e0597d70 MP |
2185 | /* |
2186 | * Determine whether disk supports Data Integrity Field. | |
2187 | */ | |
fe542396 | 2188 | static int sd_read_protection_type(struct scsi_disk *sdkp, unsigned char *buffer) |
e0597d70 MP |
2189 | { |
2190 | struct scsi_device *sdp = sdkp->device; | |
2191 | u8 type; | |
fe542396 | 2192 | int ret = 0; |
e0597d70 MP |
2193 | |
2194 | if (scsi_device_protection(sdp) == 0 || (buffer[12] & 1) == 0) | |
fe542396 | 2195 | return ret; |
35e1a5d9 MP |
2196 | |
2197 | type = ((buffer[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */ | |
2198 | ||
8475c811 | 2199 | if (type > T10_PI_TYPE3_PROTECTION) |
fe542396 MP |
2200 | ret = -ENODEV; |
2201 | else if (scsi_host_dif_capable(sdp->host, type)) | |
2202 | ret = 1; | |
2203 | ||
2204 | if (sdkp->first_scan || type != sdkp->protection_type) | |
2205 | switch (ret) { | |
2206 | case -ENODEV: | |
2207 | sd_printk(KERN_ERR, sdkp, "formatted with unsupported" \ | |
2208 | " protection type %u. Disabling disk!\n", | |
2209 | type); | |
2210 | break; | |
2211 | case 1: | |
2212 | sd_printk(KERN_NOTICE, sdkp, | |
2213 | "Enabling DIF Type %u protection\n", type); | |
2214 | break; | |
2215 | case 0: | |
2216 | sd_printk(KERN_NOTICE, sdkp, | |
2217 | "Disabling DIF Type %u protection\n", type); | |
2218 | break; | |
2219 | } | |
e0597d70 | 2220 | |
be922f47 MP |
2221 | sdkp->protection_type = type; |
2222 | ||
fe542396 | 2223 | return ret; |
e0597d70 MP |
2224 | } |
2225 | ||
0da205e0 MW |
2226 | static void read_capacity_error(struct scsi_disk *sdkp, struct scsi_device *sdp, |
2227 | struct scsi_sense_hdr *sshdr, int sense_valid, | |
2228 | int the_result) | |
2229 | { | |
c65be1a6 | 2230 | if (driver_byte(the_result) == DRIVER_SENSE) |
0da205e0 MW |
2231 | sd_print_sense_hdr(sdkp, sshdr); |
2232 | else | |
2233 | sd_printk(KERN_NOTICE, sdkp, "Sense not available.\n"); | |
2234 | ||
2235 | /* | |
2236 | * Set dirty bit for removable devices if not ready - | |
2237 | * sometimes drives will not report this properly. | |
2238 | */ | |
2239 | if (sdp->removable && | |
2240 | sense_valid && sshdr->sense_key == NOT_READY) | |
2bae0093 | 2241 | set_media_not_present(sdkp); |
0da205e0 MW |
2242 | |
2243 | /* | |
2244 | * We used to set media_present to 0 here to indicate no media | |
2245 | * in the drive, but some drives fail read capacity even with | |
2246 | * media present, so we can't do that. | |
2247 | */ | |
2248 | sdkp->capacity = 0; /* unknown mapped to zero - as usual */ | |
2249 | } | |
2250 | ||
2251 | #define RC16_LEN 32 | |
2252 | #if RC16_LEN > SD_BUF_SIZE | |
2253 | #error RC16_LEN must not be more than SD_BUF_SIZE | |
2254 | #endif | |
2255 | ||
3233ac19 JB |
2256 | #define READ_CAPACITY_RETRIES_ON_RESET 10 |
2257 | ||
7c856152 MP |
2258 | /* |
2259 | * Ensure that we don't overflow sector_t when CONFIG_LBDAF is not set | |
2260 | * and the reported logical block size is bigger than 512 bytes. Note | |
2261 | * that last_sector is a u64 and therefore logical_to_sectors() is not | |
2262 | * applicable. | |
2263 | */ | |
2264 | static bool sd_addressable_capacity(u64 lba, unsigned int sector_size) | |
2265 | { | |
2266 | u64 last_sector = (lba + 1ULL) << (ilog2(sector_size) - 9); | |
2267 | ||
2268 | if (sizeof(sector_t) == 4 && last_sector > U32_MAX) | |
2269 | return false; | |
2270 | ||
2271 | return true; | |
2272 | } | |
2273 | ||
0da205e0 MW |
2274 | static int read_capacity_16(struct scsi_disk *sdkp, struct scsi_device *sdp, |
2275 | unsigned char *buffer) | |
ea73a9f2 | 2276 | { |
1da177e4 | 2277 | unsigned char cmd[16]; |
1da177e4 LT |
2278 | struct scsi_sense_hdr sshdr; |
2279 | int sense_valid = 0; | |
0da205e0 | 2280 | int the_result; |
3233ac19 | 2281 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
ea09bcc9 | 2282 | unsigned int alignment; |
0da205e0 MW |
2283 | unsigned long long lba; |
2284 | unsigned sector_size; | |
1da177e4 | 2285 | |
5ce524bd HG |
2286 | if (sdp->no_read_capacity_16) |
2287 | return -EINVAL; | |
2288 | ||
1da177e4 | 2289 | do { |
0da205e0 | 2290 | memset(cmd, 0, 16); |
eb846d9f | 2291 | cmd[0] = SERVICE_ACTION_IN_16; |
0da205e0 MW |
2292 | cmd[1] = SAI_READ_CAPACITY_16; |
2293 | cmd[13] = RC16_LEN; | |
2294 | memset(buffer, 0, RC16_LEN); | |
2295 | ||
ea73a9f2 | 2296 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, |
0da205e0 MW |
2297 | buffer, RC16_LEN, &sshdr, |
2298 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
1da177e4 | 2299 | |
ea73a9f2 | 2300 | if (media_not_present(sdkp, &sshdr)) |
0da205e0 | 2301 | return -ENODEV; |
1da177e4 | 2302 | |
2b301307 | 2303 | if (the_result) { |
ea73a9f2 | 2304 | sense_valid = scsi_sense_valid(&sshdr); |
2b301307 MW |
2305 | if (sense_valid && |
2306 | sshdr.sense_key == ILLEGAL_REQUEST && | |
2307 | (sshdr.asc == 0x20 || sshdr.asc == 0x24) && | |
2308 | sshdr.ascq == 0x00) | |
2309 | /* Invalid Command Operation Code or | |
2310 | * Invalid Field in CDB, just retry | |
2311 | * silently with RC10 */ | |
2312 | return -EINVAL; | |
3233ac19 JB |
2313 | if (sense_valid && |
2314 | sshdr.sense_key == UNIT_ATTENTION && | |
2315 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) | |
2316 | /* Device reset might occur several times, | |
2317 | * give it one more chance */ | |
2318 | if (--reset_retries > 0) | |
2319 | continue; | |
2b301307 | 2320 | } |
1da177e4 LT |
2321 | retries--; |
2322 | ||
2323 | } while (the_result && retries); | |
2324 | ||
0da205e0 | 2325 | if (the_result) { |
ef61329d | 2326 | sd_print_result(sdkp, "Read Capacity(16) failed", the_result); |
0da205e0 MW |
2327 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); |
2328 | return -EINVAL; | |
2329 | } | |
e73aec82 | 2330 | |
8f76d151 DH |
2331 | sector_size = get_unaligned_be32(&buffer[8]); |
2332 | lba = get_unaligned_be64(&buffer[0]); | |
0da205e0 | 2333 | |
fe542396 MP |
2334 | if (sd_read_protection_type(sdkp, buffer) < 0) { |
2335 | sdkp->capacity = 0; | |
2336 | return -ENODEV; | |
2337 | } | |
0da205e0 | 2338 | |
7c856152 | 2339 | if (!sd_addressable_capacity(lba, sector_size)) { |
0da205e0 MW |
2340 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a " |
2341 | "kernel compiled with support for large block " | |
2342 | "devices.\n"); | |
2343 | sdkp->capacity = 0; | |
2344 | return -EOVERFLOW; | |
2345 | } | |
2346 | ||
ea09bcc9 | 2347 | /* Logical blocks per physical block exponent */ |
526f7c79 | 2348 | sdkp->physical_block_size = (1 << (buffer[13] & 0xf)) * sector_size; |
ea09bcc9 | 2349 | |
89d94756 HR |
2350 | /* RC basis */ |
2351 | sdkp->rc_basis = (buffer[12] >> 4) & 0x3; | |
2352 | ||
ea09bcc9 MP |
2353 | /* Lowest aligned logical block */ |
2354 | alignment = ((buffer[14] & 0x3f) << 8 | buffer[15]) * sector_size; | |
2355 | blk_queue_alignment_offset(sdp->request_queue, alignment); | |
2356 | if (alignment && sdkp->first_scan) | |
2357 | sd_printk(KERN_NOTICE, sdkp, | |
2358 | "physical block alignment offset: %u\n", alignment); | |
2359 | ||
c98a0eb0 MP |
2360 | if (buffer[14] & 0x80) { /* LBPME */ |
2361 | sdkp->lbpme = 1; | |
e339c1a7 | 2362 | |
c98a0eb0 MP |
2363 | if (buffer[14] & 0x40) /* LBPRZ */ |
2364 | sdkp->lbprz = 1; | |
e339c1a7 | 2365 | |
c98a0eb0 | 2366 | sd_config_discard(sdkp, SD_LBP_WS16); |
e339c1a7 MP |
2367 | } |
2368 | ||
0da205e0 MW |
2369 | sdkp->capacity = lba + 1; |
2370 | return sector_size; | |
2371 | } | |
2372 | ||
2373 | static int read_capacity_10(struct scsi_disk *sdkp, struct scsi_device *sdp, | |
2374 | unsigned char *buffer) | |
2375 | { | |
2376 | unsigned char cmd[16]; | |
2377 | struct scsi_sense_hdr sshdr; | |
2378 | int sense_valid = 0; | |
2379 | int the_result; | |
3233ac19 | 2380 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
0da205e0 MW |
2381 | sector_t lba; |
2382 | unsigned sector_size; | |
2383 | ||
2384 | do { | |
2385 | cmd[0] = READ_CAPACITY; | |
2386 | memset(&cmd[1], 0, 9); | |
2387 | memset(buffer, 0, 8); | |
2388 | ||
2389 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, | |
2390 | buffer, 8, &sshdr, | |
2391 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
2392 | ||
2393 | if (media_not_present(sdkp, &sshdr)) | |
2394 | return -ENODEV; | |
2395 | ||
3233ac19 | 2396 | if (the_result) { |
0da205e0 | 2397 | sense_valid = scsi_sense_valid(&sshdr); |
3233ac19 JB |
2398 | if (sense_valid && |
2399 | sshdr.sense_key == UNIT_ATTENTION && | |
2400 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) | |
2401 | /* Device reset might occur several times, | |
2402 | * give it one more chance */ | |
2403 | if (--reset_retries > 0) | |
2404 | continue; | |
2405 | } | |
0da205e0 MW |
2406 | retries--; |
2407 | ||
2408 | } while (the_result && retries); | |
2409 | ||
2410 | if (the_result) { | |
ef61329d | 2411 | sd_print_result(sdkp, "Read Capacity(10) failed", the_result); |
0da205e0 MW |
2412 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); |
2413 | return -EINVAL; | |
2414 | } | |
2415 | ||
8f76d151 DH |
2416 | sector_size = get_unaligned_be32(&buffer[4]); |
2417 | lba = get_unaligned_be32(&buffer[0]); | |
0da205e0 | 2418 | |
5ce524bd HG |
2419 | if (sdp->no_read_capacity_16 && (lba == 0xffffffff)) { |
2420 | /* Some buggy (usb cardreader) devices return an lba of | |
2421 | 0xffffffff when the want to report a size of 0 (with | |
2422 | which they really mean no media is present) */ | |
2423 | sdkp->capacity = 0; | |
5cc10350 | 2424 | sdkp->physical_block_size = sector_size; |
5ce524bd HG |
2425 | return sector_size; |
2426 | } | |
2427 | ||
7c856152 | 2428 | if (!sd_addressable_capacity(lba, sector_size)) { |
0da205e0 MW |
2429 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a " |
2430 | "kernel compiled with support for large block " | |
2431 | "devices.\n"); | |
2432 | sdkp->capacity = 0; | |
2433 | return -EOVERFLOW; | |
2434 | } | |
2435 | ||
2436 | sdkp->capacity = lba + 1; | |
526f7c79 | 2437 | sdkp->physical_block_size = sector_size; |
0da205e0 MW |
2438 | return sector_size; |
2439 | } | |
2440 | ||
2b301307 MW |
2441 | static int sd_try_rc16_first(struct scsi_device *sdp) |
2442 | { | |
f87146bb HR |
2443 | if (sdp->host->max_cmd_len < 16) |
2444 | return 0; | |
6a0bdffa AS |
2445 | if (sdp->try_rc_10_first) |
2446 | return 0; | |
2b301307 MW |
2447 | if (sdp->scsi_level > SCSI_SPC_2) |
2448 | return 1; | |
2449 | if (scsi_device_protection(sdp)) | |
2450 | return 1; | |
2451 | return 0; | |
2452 | } | |
2453 | ||
0da205e0 MW |
2454 | /* |
2455 | * read disk capacity | |
2456 | */ | |
2457 | static void | |
2458 | sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer) | |
2459 | { | |
2460 | int sector_size; | |
2461 | struct scsi_device *sdp = sdkp->device; | |
2462 | ||
2b301307 | 2463 | if (sd_try_rc16_first(sdp)) { |
0da205e0 MW |
2464 | sector_size = read_capacity_16(sdkp, sdp, buffer); |
2465 | if (sector_size == -EOVERFLOW) | |
1da177e4 | 2466 | goto got_data; |
2b301307 MW |
2467 | if (sector_size == -ENODEV) |
2468 | return; | |
2469 | if (sector_size < 0) | |
2470 | sector_size = read_capacity_10(sdkp, sdp, buffer); | |
0da205e0 MW |
2471 | if (sector_size < 0) |
2472 | return; | |
1da177e4 | 2473 | } else { |
0da205e0 MW |
2474 | sector_size = read_capacity_10(sdkp, sdp, buffer); |
2475 | if (sector_size == -EOVERFLOW) | |
2476 | goto got_data; | |
2477 | if (sector_size < 0) | |
2478 | return; | |
2479 | if ((sizeof(sdkp->capacity) > 4) && | |
2480 | (sdkp->capacity > 0xffffffffULL)) { | |
2481 | int old_sector_size = sector_size; | |
2482 | sd_printk(KERN_NOTICE, sdkp, "Very big device. " | |
2483 | "Trying to use READ CAPACITY(16).\n"); | |
2484 | sector_size = read_capacity_16(sdkp, sdp, buffer); | |
2485 | if (sector_size < 0) { | |
2486 | sd_printk(KERN_NOTICE, sdkp, | |
2487 | "Using 0xffffffff as device size\n"); | |
2488 | sdkp->capacity = 1 + (sector_t) 0xffffffff; | |
2489 | sector_size = old_sector_size; | |
2490 | goto got_data; | |
2491 | } | |
597d7400 MP |
2492 | /* Remember that READ CAPACITY(16) succeeded */ |
2493 | sdp->try_rc_10_first = 0; | |
0da205e0 MW |
2494 | } |
2495 | } | |
1da177e4 | 2496 | |
5c211caa AS |
2497 | /* Some devices are known to return the total number of blocks, |
2498 | * not the highest block number. Some devices have versions | |
2499 | * which do this and others which do not. Some devices we might | |
2500 | * suspect of doing this but we don't know for certain. | |
2501 | * | |
2502 | * If we know the reported capacity is wrong, decrement it. If | |
2503 | * we can only guess, then assume the number of blocks is even | |
2504 | * (usually true but not always) and err on the side of lowering | |
2505 | * the capacity. | |
2506 | */ | |
2507 | if (sdp->fix_capacity || | |
2508 | (sdp->guess_capacity && (sdkp->capacity & 0x01))) { | |
2509 | sd_printk(KERN_INFO, sdkp, "Adjusting the sector count " | |
2510 | "from its reported value: %llu\n", | |
2511 | (unsigned long long) sdkp->capacity); | |
1da177e4 | 2512 | --sdkp->capacity; |
61bf54b7 ON |
2513 | } |
2514 | ||
1da177e4 LT |
2515 | got_data: |
2516 | if (sector_size == 0) { | |
2517 | sector_size = 512; | |
e73aec82 MP |
2518 | sd_printk(KERN_NOTICE, sdkp, "Sector size 0 reported, " |
2519 | "assuming 512.\n"); | |
1da177e4 LT |
2520 | } |
2521 | ||
2522 | if (sector_size != 512 && | |
2523 | sector_size != 1024 && | |
2524 | sector_size != 2048 && | |
74856fbf | 2525 | sector_size != 4096) { |
e73aec82 MP |
2526 | sd_printk(KERN_NOTICE, sdkp, "Unsupported sector size %d.\n", |
2527 | sector_size); | |
1da177e4 LT |
2528 | /* |
2529 | * The user might want to re-format the drive with | |
2530 | * a supported sectorsize. Once this happens, it | |
2531 | * would be relatively trivial to set the thing up. | |
2532 | * For this reason, we leave the thing in the table. | |
2533 | */ | |
2534 | sdkp->capacity = 0; | |
2535 | /* | |
2536 | * set a bogus sector size so the normal read/write | |
2537 | * logic in the block layer will eventually refuse any | |
2538 | * request on this device without tripping over power | |
2539 | * of two sector size assumptions | |
2540 | */ | |
2541 | sector_size = 512; | |
2542 | } | |
e1defc4f | 2543 | blk_queue_logical_block_size(sdp->request_queue, sector_size); |
89d94756 HR |
2544 | blk_queue_physical_block_size(sdp->request_queue, |
2545 | sdkp->physical_block_size); | |
2546 | sdkp->device->sector_size = sector_size; | |
7404ad3b | 2547 | |
89d94756 HR |
2548 | if (sdkp->capacity > 0xffffffff) |
2549 | sdp->use_16_for_rw = 1; | |
1da177e4 | 2550 | |
89d94756 | 2551 | } |
1da177e4 | 2552 | |
89d94756 HR |
2553 | /* |
2554 | * Print disk capacity | |
2555 | */ | |
2556 | static void | |
2557 | sd_print_capacity(struct scsi_disk *sdkp, | |
2558 | sector_t old_capacity) | |
2559 | { | |
2560 | int sector_size = sdkp->device->sector_size; | |
2561 | char cap_str_2[10], cap_str_10[10]; | |
ea09bcc9 | 2562 | |
d7e6db20 DLM |
2563 | if (!sdkp->first_scan && old_capacity == sdkp->capacity) |
2564 | return; | |
2565 | ||
89d94756 HR |
2566 | string_get_size(sdkp->capacity, sector_size, |
2567 | STRING_UNITS_2, cap_str_2, sizeof(cap_str_2)); | |
2568 | string_get_size(sdkp->capacity, sector_size, | |
d7e6db20 | 2569 | STRING_UNITS_10, cap_str_10, sizeof(cap_str_10)); |
1da177e4 | 2570 | |
d7e6db20 DLM |
2571 | sd_printk(KERN_NOTICE, sdkp, |
2572 | "%llu %d-byte logical blocks: (%s/%s)\n", | |
2573 | (unsigned long long)sdkp->capacity, | |
2574 | sector_size, cap_str_10, cap_str_2); | |
53ad570b | 2575 | |
d7e6db20 DLM |
2576 | if (sdkp->physical_block_size != sector_size) |
2577 | sd_printk(KERN_NOTICE, sdkp, | |
2578 | "%u-byte physical blocks\n", | |
2579 | sdkp->physical_block_size); | |
89d94756 | 2580 | |
d7e6db20 | 2581 | sd_zbc_print_zones(sdkp); |
1da177e4 LT |
2582 | } |
2583 | ||
2584 | /* called with buffer of length 512 */ | |
2585 | static inline int | |
ea73a9f2 JB |
2586 | sd_do_mode_sense(struct scsi_device *sdp, int dbd, int modepage, |
2587 | unsigned char *buffer, int len, struct scsi_mode_data *data, | |
2588 | struct scsi_sense_hdr *sshdr) | |
1da177e4 | 2589 | { |
ea73a9f2 | 2590 | return scsi_mode_sense(sdp, dbd, modepage, buffer, len, |
1cf72699 | 2591 | SD_TIMEOUT, SD_MAX_RETRIES, data, |
ea73a9f2 | 2592 | sshdr); |
1da177e4 LT |
2593 | } |
2594 | ||
2595 | /* | |
2596 | * read write protect setting, if possible - called only in sd_revalidate_disk() | |
48970800 | 2597 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
2598 | */ |
2599 | static void | |
e73aec82 | 2600 | sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer) |
ea73a9f2 | 2601 | { |
1da177e4 | 2602 | int res; |
ea73a9f2 | 2603 | struct scsi_device *sdp = sdkp->device; |
1da177e4 | 2604 | struct scsi_mode_data data; |
20bd1d02 | 2605 | int disk_ro = get_disk_ro(sdkp->disk); |
70a9b873 | 2606 | int old_wp = sdkp->write_prot; |
1da177e4 LT |
2607 | |
2608 | set_disk_ro(sdkp->disk, 0); | |
ea73a9f2 | 2609 | if (sdp->skip_ms_page_3f) { |
b2bff6ce | 2610 | sd_first_printk(KERN_NOTICE, sdkp, "Assuming Write Enabled\n"); |
1da177e4 LT |
2611 | return; |
2612 | } | |
2613 | ||
ea73a9f2 JB |
2614 | if (sdp->use_192_bytes_for_3f) { |
2615 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 192, &data, NULL); | |
1da177e4 LT |
2616 | } else { |
2617 | /* | |
2618 | * First attempt: ask for all pages (0x3F), but only 4 bytes. | |
2619 | * We have to start carefully: some devices hang if we ask | |
2620 | * for more than is available. | |
2621 | */ | |
ea73a9f2 | 2622 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 4, &data, NULL); |
1da177e4 LT |
2623 | |
2624 | /* | |
2625 | * Second attempt: ask for page 0 When only page 0 is | |
2626 | * implemented, a request for page 3F may return Sense Key | |
2627 | * 5: Illegal Request, Sense Code 24: Invalid field in | |
2628 | * CDB. | |
2629 | */ | |
2630 | if (!scsi_status_is_good(res)) | |
ea73a9f2 | 2631 | res = sd_do_mode_sense(sdp, 0, 0, buffer, 4, &data, NULL); |
1da177e4 LT |
2632 | |
2633 | /* | |
2634 | * Third attempt: ask 255 bytes, as we did earlier. | |
2635 | */ | |
2636 | if (!scsi_status_is_good(res)) | |
ea73a9f2 JB |
2637 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 255, |
2638 | &data, NULL); | |
1da177e4 LT |
2639 | } |
2640 | ||
2641 | if (!scsi_status_is_good(res)) { | |
b2bff6ce | 2642 | sd_first_printk(KERN_WARNING, sdkp, |
e73aec82 | 2643 | "Test WP failed, assume Write Enabled\n"); |
1da177e4 LT |
2644 | } else { |
2645 | sdkp->write_prot = ((data.device_specific & 0x80) != 0); | |
20bd1d02 | 2646 | set_disk_ro(sdkp->disk, sdkp->write_prot || disk_ro); |
70a9b873 MP |
2647 | if (sdkp->first_scan || old_wp != sdkp->write_prot) { |
2648 | sd_printk(KERN_NOTICE, sdkp, "Write Protect is %s\n", | |
2649 | sdkp->write_prot ? "on" : "off"); | |
df441cc0 | 2650 | sd_printk(KERN_DEBUG, sdkp, "Mode Sense: %4ph\n", buffer); |
70a9b873 | 2651 | } |
1da177e4 LT |
2652 | } |
2653 | } | |
2654 | ||
2655 | /* | |
2656 | * sd_read_cache_type - called only from sd_revalidate_disk() | |
48970800 | 2657 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
2658 | */ |
2659 | static void | |
e73aec82 | 2660 | sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer) |
631e8a13 | 2661 | { |
1da177e4 | 2662 | int len = 0, res; |
ea73a9f2 | 2663 | struct scsi_device *sdp = sdkp->device; |
1da177e4 | 2664 | |
631e8a13 AV |
2665 | int dbd; |
2666 | int modepage; | |
0bcaa111 | 2667 | int first_len; |
1da177e4 LT |
2668 | struct scsi_mode_data data; |
2669 | struct scsi_sense_hdr sshdr; | |
70a9b873 MP |
2670 | int old_wce = sdkp->WCE; |
2671 | int old_rcd = sdkp->RCD; | |
2672 | int old_dpofua = sdkp->DPOFUA; | |
1da177e4 | 2673 | |
39c60a09 JB |
2674 | |
2675 | if (sdkp->cache_override) | |
2676 | return; | |
2677 | ||
0bcaa111 LT |
2678 | first_len = 4; |
2679 | if (sdp->skip_ms_page_8) { | |
2680 | if (sdp->type == TYPE_RBC) | |
2681 | goto defaults; | |
2682 | else { | |
2683 | if (sdp->skip_ms_page_3f) | |
2684 | goto defaults; | |
2685 | modepage = 0x3F; | |
2686 | if (sdp->use_192_bytes_for_3f) | |
2687 | first_len = 192; | |
2688 | dbd = 0; | |
2689 | } | |
2690 | } else if (sdp->type == TYPE_RBC) { | |
631e8a13 AV |
2691 | modepage = 6; |
2692 | dbd = 8; | |
2693 | } else { | |
2694 | modepage = 8; | |
2695 | dbd = 0; | |
2696 | } | |
2697 | ||
1da177e4 | 2698 | /* cautiously ask */ |
0bcaa111 LT |
2699 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, first_len, |
2700 | &data, &sshdr); | |
1da177e4 LT |
2701 | |
2702 | if (!scsi_status_is_good(res)) | |
2703 | goto bad_sense; | |
2704 | ||
6d73c851 AV |
2705 | if (!data.header_length) { |
2706 | modepage = 6; | |
0bcaa111 | 2707 | first_len = 0; |
b2bff6ce MP |
2708 | sd_first_printk(KERN_ERR, sdkp, |
2709 | "Missing header in MODE_SENSE response\n"); | |
6d73c851 AV |
2710 | } |
2711 | ||
1da177e4 LT |
2712 | /* that went OK, now ask for the proper length */ |
2713 | len = data.length; | |
2714 | ||
2715 | /* | |
2716 | * We're only interested in the first three bytes, actually. | |
2717 | * But the data cache page is defined for the first 20. | |
2718 | */ | |
2719 | if (len < 3) | |
2720 | goto bad_sense; | |
0bcaa111 | 2721 | else if (len > SD_BUF_SIZE) { |
b2bff6ce | 2722 | sd_first_printk(KERN_NOTICE, sdkp, "Truncating mode parameter " |
0bcaa111 LT |
2723 | "data from %d to %d bytes\n", len, SD_BUF_SIZE); |
2724 | len = SD_BUF_SIZE; | |
2725 | } | |
2726 | if (modepage == 0x3F && sdp->use_192_bytes_for_3f) | |
2727 | len = 192; | |
1da177e4 LT |
2728 | |
2729 | /* Get the data */ | |
0bcaa111 LT |
2730 | if (len > first_len) |
2731 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, len, | |
2732 | &data, &sshdr); | |
1da177e4 LT |
2733 | |
2734 | if (scsi_status_is_good(res)) { | |
631e8a13 | 2735 | int offset = data.header_length + data.block_descriptor_length; |
1da177e4 | 2736 | |
0bcaa111 LT |
2737 | while (offset < len) { |
2738 | u8 page_code = buffer[offset] & 0x3F; | |
2739 | u8 spf = buffer[offset] & 0x40; | |
2740 | ||
2741 | if (page_code == 8 || page_code == 6) { | |
2742 | /* We're interested only in the first 3 bytes. | |
2743 | */ | |
2744 | if (len - offset <= 2) { | |
b2bff6ce MP |
2745 | sd_first_printk(KERN_ERR, sdkp, |
2746 | "Incomplete mode parameter " | |
2747 | "data\n"); | |
0bcaa111 LT |
2748 | goto defaults; |
2749 | } else { | |
2750 | modepage = page_code; | |
2751 | goto Page_found; | |
2752 | } | |
2753 | } else { | |
2754 | /* Go to the next page */ | |
2755 | if (spf && len - offset > 3) | |
2756 | offset += 4 + (buffer[offset+2] << 8) + | |
2757 | buffer[offset+3]; | |
2758 | else if (!spf && len - offset > 1) | |
2759 | offset += 2 + buffer[offset+1]; | |
2760 | else { | |
b2bff6ce MP |
2761 | sd_first_printk(KERN_ERR, sdkp, |
2762 | "Incomplete mode " | |
2763 | "parameter data\n"); | |
0bcaa111 LT |
2764 | goto defaults; |
2765 | } | |
2766 | } | |
48970800 AV |
2767 | } |
2768 | ||
b2bff6ce | 2769 | sd_first_printk(KERN_ERR, sdkp, "No Caching mode page found\n"); |
984f1733 AS |
2770 | goto defaults; |
2771 | ||
0bcaa111 | 2772 | Page_found: |
631e8a13 AV |
2773 | if (modepage == 8) { |
2774 | sdkp->WCE = ((buffer[offset + 2] & 0x04) != 0); | |
2775 | sdkp->RCD = ((buffer[offset + 2] & 0x01) != 0); | |
2776 | } else { | |
2777 | sdkp->WCE = ((buffer[offset + 2] & 0x01) == 0); | |
2778 | sdkp->RCD = 0; | |
2779 | } | |
1da177e4 | 2780 | |
007365ad | 2781 | sdkp->DPOFUA = (data.device_specific & 0x10) != 0; |
b14bf2d0 AS |
2782 | if (sdp->broken_fua) { |
2783 | sd_first_printk(KERN_NOTICE, sdkp, "Disabling FUA\n"); | |
2784 | sdkp->DPOFUA = 0; | |
26f28197 DLM |
2785 | } else if (sdkp->DPOFUA && !sdkp->device->use_10_for_rw && |
2786 | !sdkp->device->use_16_for_rw) { | |
b2bff6ce | 2787 | sd_first_printk(KERN_NOTICE, sdkp, |
e73aec82 | 2788 | "Uses READ/WRITE(6), disabling FUA\n"); |
007365ad TH |
2789 | sdkp->DPOFUA = 0; |
2790 | } | |
2791 | ||
2eefd57b SRT |
2792 | /* No cache flush allowed for write protected devices */ |
2793 | if (sdkp->WCE && sdkp->write_prot) | |
2794 | sdkp->WCE = 0; | |
2795 | ||
70a9b873 MP |
2796 | if (sdkp->first_scan || old_wce != sdkp->WCE || |
2797 | old_rcd != sdkp->RCD || old_dpofua != sdkp->DPOFUA) | |
2798 | sd_printk(KERN_NOTICE, sdkp, | |
2799 | "Write cache: %s, read cache: %s, %s\n", | |
2800 | sdkp->WCE ? "enabled" : "disabled", | |
2801 | sdkp->RCD ? "disabled" : "enabled", | |
2802 | sdkp->DPOFUA ? "supports DPO and FUA" | |
2803 | : "doesn't support DPO or FUA"); | |
1da177e4 LT |
2804 | |
2805 | return; | |
2806 | } | |
2807 | ||
2808 | bad_sense: | |
ea73a9f2 | 2809 | if (scsi_sense_valid(&sshdr) && |
1da177e4 LT |
2810 | sshdr.sense_key == ILLEGAL_REQUEST && |
2811 | sshdr.asc == 0x24 && sshdr.ascq == 0x0) | |
e73aec82 | 2812 | /* Invalid field in CDB */ |
b2bff6ce | 2813 | sd_first_printk(KERN_NOTICE, sdkp, "Cache data unavailable\n"); |
1da177e4 | 2814 | else |
b2bff6ce MP |
2815 | sd_first_printk(KERN_ERR, sdkp, |
2816 | "Asking for cache data failed\n"); | |
1da177e4 LT |
2817 | |
2818 | defaults: | |
b81478d8 | 2819 | if (sdp->wce_default_on) { |
b2bff6ce MP |
2820 | sd_first_printk(KERN_NOTICE, sdkp, |
2821 | "Assuming drive cache: write back\n"); | |
b81478d8 NJ |
2822 | sdkp->WCE = 1; |
2823 | } else { | |
b2bff6ce MP |
2824 | sd_first_printk(KERN_ERR, sdkp, |
2825 | "Assuming drive cache: write through\n"); | |
b81478d8 NJ |
2826 | sdkp->WCE = 0; |
2827 | } | |
1da177e4 | 2828 | sdkp->RCD = 0; |
48970800 | 2829 | sdkp->DPOFUA = 0; |
1da177e4 LT |
2830 | } |
2831 | ||
e0597d70 MP |
2832 | /* |
2833 | * The ATO bit indicates whether the DIF application tag is available | |
2834 | * for use by the operating system. | |
2835 | */ | |
439d77f7 | 2836 | static void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer) |
e0597d70 MP |
2837 | { |
2838 | int res, offset; | |
2839 | struct scsi_device *sdp = sdkp->device; | |
2840 | struct scsi_mode_data data; | |
2841 | struct scsi_sense_hdr sshdr; | |
2842 | ||
89d94756 | 2843 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) |
e0597d70 MP |
2844 | return; |
2845 | ||
2846 | if (sdkp->protection_type == 0) | |
2847 | return; | |
2848 | ||
2849 | res = scsi_mode_sense(sdp, 1, 0x0a, buffer, 36, SD_TIMEOUT, | |
2850 | SD_MAX_RETRIES, &data, &sshdr); | |
2851 | ||
2852 | if (!scsi_status_is_good(res) || !data.header_length || | |
2853 | data.length < 6) { | |
b2bff6ce | 2854 | sd_first_printk(KERN_WARNING, sdkp, |
e0597d70 MP |
2855 | "getting Control mode page failed, assume no ATO\n"); |
2856 | ||
2857 | if (scsi_sense_valid(&sshdr)) | |
2858 | sd_print_sense_hdr(sdkp, &sshdr); | |
2859 | ||
2860 | return; | |
2861 | } | |
2862 | ||
2863 | offset = data.header_length + data.block_descriptor_length; | |
2864 | ||
2865 | if ((buffer[offset] & 0x3f) != 0x0a) { | |
b2bff6ce | 2866 | sd_first_printk(KERN_ERR, sdkp, "ATO Got wrong page\n"); |
e0597d70 MP |
2867 | return; |
2868 | } | |
2869 | ||
2870 | if ((buffer[offset + 5] & 0x80) == 0) | |
2871 | return; | |
2872 | ||
2873 | sdkp->ATO = 1; | |
2874 | ||
2875 | return; | |
2876 | } | |
2877 | ||
d11b6916 MP |
2878 | /** |
2879 | * sd_read_block_limits - Query disk device for preferred I/O sizes. | |
7529fbb0 | 2880 | * @sdkp: disk to query |
d11b6916 MP |
2881 | */ |
2882 | static void sd_read_block_limits(struct scsi_disk *sdkp) | |
2883 | { | |
2884 | unsigned int sector_sz = sdkp->device->sector_size; | |
bb2d3de1 | 2885 | const int vpd_len = 64; |
e3deec09 | 2886 | unsigned char *buffer = kmalloc(vpd_len, GFP_KERNEL); |
d11b6916 | 2887 | |
e3deec09 JB |
2888 | if (!buffer || |
2889 | /* Block Limits VPD */ | |
2890 | scsi_get_vpd_page(sdkp->device, 0xb0, buffer, vpd_len)) | |
2891 | goto out; | |
d11b6916 MP |
2892 | |
2893 | blk_queue_io_min(sdkp->disk->queue, | |
2894 | get_unaligned_be16(&buffer[6]) * sector_sz); | |
ca369d51 MP |
2895 | |
2896 | sdkp->max_xfer_blocks = get_unaligned_be32(&buffer[8]); | |
2897 | sdkp->opt_xfer_blocks = get_unaligned_be32(&buffer[12]); | |
d11b6916 | 2898 | |
c98a0eb0 MP |
2899 | if (buffer[3] == 0x3c) { |
2900 | unsigned int lba_count, desc_count; | |
e339c1a7 | 2901 | |
5db44863 | 2902 | sdkp->max_ws_blocks = (u32)get_unaligned_be64(&buffer[36]); |
e339c1a7 | 2903 | |
c98a0eb0 | 2904 | if (!sdkp->lbpme) |
045d3fe7 | 2905 | goto out; |
045d3fe7 | 2906 | |
c98a0eb0 MP |
2907 | lba_count = get_unaligned_be32(&buffer[20]); |
2908 | desc_count = get_unaligned_be32(&buffer[24]); | |
045d3fe7 | 2909 | |
c98a0eb0 MP |
2910 | if (lba_count && desc_count) |
2911 | sdkp->max_unmap_blocks = lba_count; | |
e339c1a7 | 2912 | |
c98a0eb0 | 2913 | sdkp->unmap_granularity = get_unaligned_be32(&buffer[28]); |
e339c1a7 MP |
2914 | |
2915 | if (buffer[32] & 0x80) | |
c98a0eb0 | 2916 | sdkp->unmap_alignment = |
e339c1a7 | 2917 | get_unaligned_be32(&buffer[32]) & ~(1 << 31); |
c98a0eb0 MP |
2918 | |
2919 | if (!sdkp->lbpvpd) { /* LBP VPD page not provided */ | |
2920 | ||
2921 | if (sdkp->max_unmap_blocks) | |
2922 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
2923 | else | |
2924 | sd_config_discard(sdkp, SD_LBP_WS16); | |
2925 | ||
2926 | } else { /* LBP VPD page tells us what to use */ | |
bcd069bb | 2927 | if (sdkp->lbpu && sdkp->max_unmap_blocks) |
e461338b MP |
2928 | sd_config_discard(sdkp, SD_LBP_UNMAP); |
2929 | else if (sdkp->lbpws) | |
c98a0eb0 MP |
2930 | sd_config_discard(sdkp, SD_LBP_WS16); |
2931 | else if (sdkp->lbpws10) | |
2932 | sd_config_discard(sdkp, SD_LBP_WS10); | |
2933 | else | |
2934 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
2935 | } | |
e339c1a7 MP |
2936 | } |
2937 | ||
e3deec09 | 2938 | out: |
d11b6916 MP |
2939 | kfree(buffer); |
2940 | } | |
2941 | ||
3821d768 MP |
2942 | /** |
2943 | * sd_read_block_characteristics - Query block dev. characteristics | |
7529fbb0 | 2944 | * @sdkp: disk to query |
3821d768 MP |
2945 | */ |
2946 | static void sd_read_block_characteristics(struct scsi_disk *sdkp) | |
2947 | { | |
89d94756 | 2948 | struct request_queue *q = sdkp->disk->queue; |
e3deec09 | 2949 | unsigned char *buffer; |
3821d768 | 2950 | u16 rot; |
bb2d3de1 | 2951 | const int vpd_len = 64; |
3821d768 | 2952 | |
e3deec09 | 2953 | buffer = kmalloc(vpd_len, GFP_KERNEL); |
3821d768 | 2954 | |
e3deec09 JB |
2955 | if (!buffer || |
2956 | /* Block Device Characteristics VPD */ | |
2957 | scsi_get_vpd_page(sdkp->device, 0xb1, buffer, vpd_len)) | |
2958 | goto out; | |
3821d768 MP |
2959 | |
2960 | rot = get_unaligned_be16(&buffer[4]); | |
2961 | ||
b277da0a | 2962 | if (rot == 1) { |
8b904b5b BVA |
2963 | blk_queue_flag_set(QUEUE_FLAG_NONROT, q); |
2964 | blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, q); | |
83e32a59 XZ |
2965 | } else { |
2966 | blk_queue_flag_clear(QUEUE_FLAG_NONROT, q); | |
2967 | blk_queue_flag_set(QUEUE_FLAG_ADD_RANDOM, q); | |
b277da0a | 2968 | } |
3821d768 | 2969 | |
68af412c DLM |
2970 | if (sdkp->device->type == TYPE_ZBC) { |
2971 | /* Host-managed */ | |
89d94756 | 2972 | q->limits.zoned = BLK_ZONED_HM; |
68af412c DLM |
2973 | } else { |
2974 | sdkp->zoned = (buffer[8] >> 4) & 3; | |
2975 | if (sdkp->zoned == 1) | |
2976 | /* Host-aware */ | |
2977 | q->limits.zoned = BLK_ZONED_HA; | |
2978 | else | |
2979 | /* | |
2980 | * Treat drive-managed devices as | |
2981 | * regular block devices. | |
2982 | */ | |
2983 | q->limits.zoned = BLK_ZONED_NONE; | |
2984 | } | |
89d94756 HR |
2985 | if (blk_queue_is_zoned(q) && sdkp->first_scan) |
2986 | sd_printk(KERN_NOTICE, sdkp, "Host-%s zoned block device\n", | |
2987 | q->limits.zoned == BLK_ZONED_HM ? "managed" : "aware"); | |
2988 | ||
e3deec09 | 2989 | out: |
3821d768 MP |
2990 | kfree(buffer); |
2991 | } | |
2992 | ||
045d3fe7 | 2993 | /** |
c98a0eb0 | 2994 | * sd_read_block_provisioning - Query provisioning VPD page |
7529fbb0 | 2995 | * @sdkp: disk to query |
045d3fe7 | 2996 | */ |
c98a0eb0 | 2997 | static void sd_read_block_provisioning(struct scsi_disk *sdkp) |
045d3fe7 MP |
2998 | { |
2999 | unsigned char *buffer; | |
3000 | const int vpd_len = 8; | |
3001 | ||
c98a0eb0 | 3002 | if (sdkp->lbpme == 0) |
045d3fe7 MP |
3003 | return; |
3004 | ||
3005 | buffer = kmalloc(vpd_len, GFP_KERNEL); | |
3006 | ||
3007 | if (!buffer || scsi_get_vpd_page(sdkp->device, 0xb2, buffer, vpd_len)) | |
3008 | goto out; | |
3009 | ||
c98a0eb0 MP |
3010 | sdkp->lbpvpd = 1; |
3011 | sdkp->lbpu = (buffer[5] >> 7) & 1; /* UNMAP */ | |
3012 | sdkp->lbpws = (buffer[5] >> 6) & 1; /* WRITE SAME(16) with UNMAP */ | |
3013 | sdkp->lbpws10 = (buffer[5] >> 5) & 1; /* WRITE SAME(10) with UNMAP */ | |
045d3fe7 MP |
3014 | |
3015 | out: | |
3016 | kfree(buffer); | |
3017 | } | |
3018 | ||
5db44863 MP |
3019 | static void sd_read_write_same(struct scsi_disk *sdkp, unsigned char *buffer) |
3020 | { | |
66c28f97 MP |
3021 | struct scsi_device *sdev = sdkp->device; |
3022 | ||
54b2b50c MP |
3023 | if (sdev->host->no_write_same) { |
3024 | sdev->no_write_same = 1; | |
3025 | ||
3026 | return; | |
3027 | } | |
3028 | ||
66c28f97 | 3029 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, INQUIRY) < 0) { |
af73623f BS |
3030 | /* too large values might cause issues with arcmsr */ |
3031 | int vpd_buf_len = 64; | |
3032 | ||
66c28f97 MP |
3033 | sdev->no_report_opcodes = 1; |
3034 | ||
3035 | /* Disable WRITE SAME if REPORT SUPPORTED OPERATION | |
3036 | * CODES is unsupported and the device has an ATA | |
3037 | * Information VPD page (SAT). | |
3038 | */ | |
af73623f | 3039 | if (!scsi_get_vpd_page(sdev, 0x89, buffer, vpd_buf_len)) |
66c28f97 MP |
3040 | sdev->no_write_same = 1; |
3041 | } | |
3042 | ||
3043 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME_16) == 1) | |
5db44863 | 3044 | sdkp->ws16 = 1; |
66c28f97 MP |
3045 | |
3046 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME) == 1) | |
3047 | sdkp->ws10 = 1; | |
5db44863 MP |
3048 | } |
3049 | ||
d80210f2 CH |
3050 | static void sd_read_security(struct scsi_disk *sdkp, unsigned char *buffer) |
3051 | { | |
3052 | struct scsi_device *sdev = sdkp->device; | |
3053 | ||
3054 | if (!sdev->security_supported) | |
3055 | return; | |
3056 | ||
3057 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, | |
3058 | SECURITY_PROTOCOL_IN) == 1 && | |
3059 | scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, | |
3060 | SECURITY_PROTOCOL_OUT) == 1) | |
3061 | sdkp->security = 1; | |
3062 | } | |
3063 | ||
1da177e4 LT |
3064 | /** |
3065 | * sd_revalidate_disk - called the first time a new disk is seen, | |
3066 | * performs disk spin up, read_capacity, etc. | |
3067 | * @disk: struct gendisk we care about | |
3068 | **/ | |
3069 | static int sd_revalidate_disk(struct gendisk *disk) | |
3070 | { | |
3071 | struct scsi_disk *sdkp = scsi_disk(disk); | |
3072 | struct scsi_device *sdp = sdkp->device; | |
ca369d51 | 3073 | struct request_queue *q = sdkp->disk->queue; |
89d94756 | 3074 | sector_t old_capacity = sdkp->capacity; |
1da177e4 | 3075 | unsigned char *buffer; |
ca369d51 | 3076 | unsigned int dev_max, rw_max; |
1da177e4 | 3077 | |
fa0d34be MP |
3078 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, |
3079 | "sd_revalidate_disk\n")); | |
1da177e4 LT |
3080 | |
3081 | /* | |
3082 | * If the device is offline, don't try and read capacity or any | |
3083 | * of the other niceties. | |
3084 | */ | |
3085 | if (!scsi_device_online(sdp)) | |
3086 | goto out; | |
3087 | ||
a6123f14 | 3088 | buffer = kmalloc(SD_BUF_SIZE, GFP_KERNEL); |
1da177e4 | 3089 | if (!buffer) { |
e73aec82 MP |
3090 | sd_printk(KERN_WARNING, sdkp, "sd_revalidate_disk: Memory " |
3091 | "allocation failure.\n"); | |
ea73a9f2 | 3092 | goto out; |
1da177e4 LT |
3093 | } |
3094 | ||
e73aec82 | 3095 | sd_spinup_disk(sdkp); |
1da177e4 LT |
3096 | |
3097 | /* | |
3098 | * Without media there is no reason to ask; moreover, some devices | |
3099 | * react badly if we do. | |
3100 | */ | |
3101 | if (sdkp->media_present) { | |
e73aec82 | 3102 | sd_read_capacity(sdkp, buffer); |
ffd4bc2a | 3103 | |
5ddfe085 | 3104 | if (scsi_device_supports_vpd(sdp)) { |
c98a0eb0 | 3105 | sd_read_block_provisioning(sdkp); |
ffd4bc2a MP |
3106 | sd_read_block_limits(sdkp); |
3107 | sd_read_block_characteristics(sdkp); | |
89d94756 | 3108 | sd_zbc_read_zones(sdkp, buffer); |
ffd4bc2a MP |
3109 | } |
3110 | ||
89d94756 HR |
3111 | sd_print_capacity(sdkp, old_capacity); |
3112 | ||
e73aec82 MP |
3113 | sd_read_write_protect_flag(sdkp, buffer); |
3114 | sd_read_cache_type(sdkp, buffer); | |
e0597d70 | 3115 | sd_read_app_tag_own(sdkp, buffer); |
5db44863 | 3116 | sd_read_write_same(sdkp, buffer); |
d80210f2 | 3117 | sd_read_security(sdkp, buffer); |
1da177e4 | 3118 | } |
461d4e90 TH |
3119 | |
3120 | /* | |
3121 | * We now have all cache related info, determine how we deal | |
4913efe4 | 3122 | * with flush requests. |
461d4e90 | 3123 | */ |
cb2fb68d | 3124 | sd_set_flush_flag(sdkp); |
461d4e90 | 3125 | |
ca369d51 MP |
3126 | /* Initial block count limit based on CDB TRANSFER LENGTH field size. */ |
3127 | dev_max = sdp->use_16_for_rw ? SD_MAX_XFER_BLOCKS : SD_DEF_XFER_BLOCKS; | |
3128 | ||
3129 | /* Some devices report a maximum block count for READ/WRITE requests. */ | |
3130 | dev_max = min_not_zero(dev_max, sdkp->max_xfer_blocks); | |
3131 | q->limits.max_dev_sectors = logical_to_sectors(sdp, dev_max); | |
3132 | ||
3133 | /* | |
77082ca5 | 3134 | * Determine the device's preferred I/O size for reads and writes |
9c1d9c20 MP |
3135 | * unless the reported value is unreasonably small, large, or |
3136 | * garbage. | |
ca369d51 | 3137 | */ |
9c1d9c20 MP |
3138 | if (sdkp->opt_xfer_blocks && |
3139 | sdkp->opt_xfer_blocks <= dev_max && | |
3140 | sdkp->opt_xfer_blocks <= SD_DEF_XFER_BLOCKS && | |
6b7e9cde MP |
3141 | logical_to_bytes(sdp, sdkp->opt_xfer_blocks) >= PAGE_SIZE) { |
3142 | q->limits.io_opt = logical_to_bytes(sdp, sdkp->opt_xfer_blocks); | |
3143 | rw_max = logical_to_sectors(sdp, sdkp->opt_xfer_blocks); | |
3144 | } else | |
67804145 FZ |
3145 | rw_max = min_not_zero(logical_to_sectors(sdp, dev_max), |
3146 | (sector_t)BLK_DEF_MAX_SECTORS); | |
3a9794d3 | 3147 | |
77082ca5 MP |
3148 | /* Do not exceed controller limit */ |
3149 | rw_max = min(rw_max, queue_max_hw_sectors(q)); | |
3150 | ||
3151 | /* | |
3152 | * Only update max_sectors if previously unset or if the current value | |
3153 | * exceeds the capabilities of the hardware. | |
3154 | */ | |
3155 | if (sdkp->first_scan || | |
3156 | q->limits.max_sectors > q->limits.max_dev_sectors || | |
3157 | q->limits.max_sectors > q->limits.max_hw_sectors) | |
3158 | q->limits.max_sectors = rw_max; | |
3159 | ||
3160 | sdkp->first_scan = 0; | |
4f258a46 | 3161 | |
f08bb1e0 | 3162 | set_capacity(disk, logical_to_sectors(sdp, sdkp->capacity)); |
5db44863 | 3163 | sd_config_write_same(sdkp); |
1da177e4 LT |
3164 | kfree(buffer); |
3165 | ||
1da177e4 LT |
3166 | out: |
3167 | return 0; | |
3168 | } | |
3169 | ||
72ec24bd TH |
3170 | /** |
3171 | * sd_unlock_native_capacity - unlock native capacity | |
3172 | * @disk: struct gendisk to set capacity for | |
3173 | * | |
3174 | * Block layer calls this function if it detects that partitions | |
3175 | * on @disk reach beyond the end of the device. If the SCSI host | |
3176 | * implements ->unlock_native_capacity() method, it's invoked to | |
3177 | * give it a chance to adjust the device capacity. | |
3178 | * | |
3179 | * CONTEXT: | |
3180 | * Defined by block layer. Might sleep. | |
3181 | */ | |
3182 | static void sd_unlock_native_capacity(struct gendisk *disk) | |
3183 | { | |
3184 | struct scsi_device *sdev = scsi_disk(disk)->device; | |
3185 | ||
3186 | if (sdev->host->hostt->unlock_native_capacity) | |
3187 | sdev->host->hostt->unlock_native_capacity(sdev); | |
3188 | } | |
3189 | ||
3e1a7ff8 TH |
3190 | /** |
3191 | * sd_format_disk_name - format disk name | |
3192 | * @prefix: name prefix - ie. "sd" for SCSI disks | |
3193 | * @index: index of the disk to format name for | |
3194 | * @buf: output buffer | |
3195 | * @buflen: length of the output buffer | |
3196 | * | |
3197 | * SCSI disk names starts at sda. The 26th device is sdz and the | |
3198 | * 27th is sdaa. The last one for two lettered suffix is sdzz | |
3199 | * which is followed by sdaaa. | |
3200 | * | |
3201 | * This is basically 26 base counting with one extra 'nil' entry | |
3ad2f3fb | 3202 | * at the beginning from the second digit on and can be |
3e1a7ff8 TH |
3203 | * determined using similar method as 26 base conversion with the |
3204 | * index shifted -1 after each digit is computed. | |
3205 | * | |
3206 | * CONTEXT: | |
3207 | * Don't care. | |
3208 | * | |
3209 | * RETURNS: | |
3210 | * 0 on success, -errno on failure. | |
3211 | */ | |
3212 | static int sd_format_disk_name(char *prefix, int index, char *buf, int buflen) | |
3213 | { | |
3214 | const int base = 'z' - 'a' + 1; | |
3215 | char *begin = buf + strlen(prefix); | |
3216 | char *end = buf + buflen; | |
3217 | char *p; | |
3218 | int unit; | |
3219 | ||
3220 | p = end - 1; | |
3221 | *p = '\0'; | |
3222 | unit = base; | |
3223 | do { | |
3224 | if (p == begin) | |
3225 | return -EINVAL; | |
3226 | *--p = 'a' + (index % unit); | |
3227 | index = (index / unit) - 1; | |
3228 | } while (index >= 0); | |
3229 | ||
3230 | memmove(begin, p, end - p); | |
3231 | memcpy(buf, prefix, strlen(prefix)); | |
3232 | ||
3233 | return 0; | |
3234 | } | |
3235 | ||
4ace92fc AV |
3236 | /* |
3237 | * The asynchronous part of sd_probe | |
3238 | */ | |
3239 | static void sd_probe_async(void *data, async_cookie_t cookie) | |
3240 | { | |
3241 | struct scsi_disk *sdkp = data; | |
3242 | struct scsi_device *sdp; | |
3243 | struct gendisk *gd; | |
3244 | u32 index; | |
3245 | struct device *dev; | |
3246 | ||
3247 | sdp = sdkp->device; | |
3248 | gd = sdkp->disk; | |
3249 | index = sdkp->index; | |
3250 | dev = &sdp->sdev_gendev; | |
3251 | ||
1a03ae0f MR |
3252 | gd->major = sd_major((index & 0xf0) >> 4); |
3253 | gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00); | |
1a03ae0f | 3254 | |
4ace92fc AV |
3255 | gd->fops = &sd_fops; |
3256 | gd->private_data = &sdkp->driver; | |
3257 | gd->queue = sdkp->device->request_queue; | |
3258 | ||
70a9b873 MP |
3259 | /* defaults, until the device tells us otherwise */ |
3260 | sdp->sector_size = 512; | |
3261 | sdkp->capacity = 0; | |
3262 | sdkp->media_present = 1; | |
3263 | sdkp->write_prot = 0; | |
39c60a09 | 3264 | sdkp->cache_override = 0; |
70a9b873 MP |
3265 | sdkp->WCE = 0; |
3266 | sdkp->RCD = 0; | |
3267 | sdkp->ATO = 0; | |
3268 | sdkp->first_scan = 1; | |
18a4d0a2 | 3269 | sdkp->max_medium_access_timeouts = SD_MAX_MEDIUM_TIMEOUTS; |
70a9b873 | 3270 | |
4ace92fc AV |
3271 | sd_revalidate_disk(gd); |
3272 | ||
97fedbbe | 3273 | gd->flags = GENHD_FL_EXT_DEVT; |
2bae0093 | 3274 | if (sdp->removable) { |
4ace92fc | 3275 | gd->flags |= GENHD_FL_REMOVABLE; |
2bae0093 TH |
3276 | gd->events |= DISK_EVENT_MEDIA_CHANGE; |
3277 | } | |
4ace92fc | 3278 | |
10c580e4 | 3279 | blk_pm_runtime_init(sdp->request_queue, dev); |
fef912bf | 3280 | device_add_disk(dev, gd, NULL); |
fe542396 MP |
3281 | if (sdkp->capacity) |
3282 | sd_dif_config_host(sdkp); | |
4ace92fc | 3283 | |
3821d768 MP |
3284 | sd_revalidate_disk(gd); |
3285 | ||
d80210f2 CH |
3286 | if (sdkp->security) { |
3287 | sdkp->opal_dev = init_opal_dev(sdp, &sd_sec_submit); | |
3288 | if (sdkp->opal_dev) | |
3289 | sd_printk(KERN_NOTICE, sdkp, "supports TCG Opal\n"); | |
3290 | } | |
3291 | ||
4ace92fc AV |
3292 | sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n", |
3293 | sdp->removable ? "removable " : ""); | |
478a8a05 | 3294 | scsi_autopm_put_device(sdp); |
ea038f63 | 3295 | put_device(&sdkp->dev); |
4ace92fc AV |
3296 | } |
3297 | ||
1da177e4 LT |
3298 | /** |
3299 | * sd_probe - called during driver initialization and whenever a | |
3300 | * new scsi device is attached to the system. It is called once | |
3301 | * for each scsi device (not just disks) present. | |
3302 | * @dev: pointer to device object | |
3303 | * | |
3304 | * Returns 0 if successful (or not interested in this scsi device | |
3305 | * (e.g. scanner)); 1 when there is an error. | |
3306 | * | |
3307 | * Note: this function is invoked from the scsi mid-level. | |
3308 | * This function sets up the mapping between a given | |
3309 | * <host,channel,id,lun> (found in sdp) and new device name | |
3310 | * (e.g. /dev/sda). More precisely it is the block device major | |
3311 | * and minor number that is chosen here. | |
3312 | * | |
2db93ce8 PU |
3313 | * Assume sd_probe is not re-entrant (for time being) |
3314 | * Also think about sd_probe() and sd_remove() running coincidentally. | |
1da177e4 LT |
3315 | **/ |
3316 | static int sd_probe(struct device *dev) | |
3317 | { | |
3318 | struct scsi_device *sdp = to_scsi_device(dev); | |
3319 | struct scsi_disk *sdkp; | |
3320 | struct gendisk *gd; | |
439d77f7 | 3321 | int index; |
1da177e4 LT |
3322 | int error; |
3323 | ||
6fe8c1db | 3324 | scsi_autopm_get_device(sdp); |
1da177e4 | 3325 | error = -ENODEV; |
89d94756 HR |
3326 | if (sdp->type != TYPE_DISK && |
3327 | sdp->type != TYPE_ZBC && | |
3328 | sdp->type != TYPE_MOD && | |
3329 | sdp->type != TYPE_RBC) | |
1da177e4 LT |
3330 | goto out; |
3331 | ||
89d94756 HR |
3332 | #ifndef CONFIG_BLK_DEV_ZONED |
3333 | if (sdp->type == TYPE_ZBC) | |
3334 | goto out; | |
3335 | #endif | |
9ccfc756 | 3336 | SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO, sdp, |
2db93ce8 | 3337 | "sd_probe\n")); |
1da177e4 LT |
3338 | |
3339 | error = -ENOMEM; | |
24669f75 | 3340 | sdkp = kzalloc(sizeof(*sdkp), GFP_KERNEL); |
1da177e4 LT |
3341 | if (!sdkp) |
3342 | goto out; | |
3343 | ||
689d6fac | 3344 | gd = alloc_disk(SD_MINORS); |
1da177e4 | 3345 | if (!gd) |
c01228db | 3346 | goto out_free; |
1da177e4 | 3347 | |
94015080 MW |
3348 | index = ida_alloc(&sd_index_ida, GFP_KERNEL); |
3349 | if (index < 0) { | |
21208ae5 | 3350 | sdev_printk(KERN_WARNING, sdp, "sd_probe: memory exhausted.\n"); |
1da177e4 | 3351 | goto out_put; |
1a03ae0f MR |
3352 | } |
3353 | ||
3e1a7ff8 | 3354 | error = sd_format_disk_name("sd", index, gd->disk_name, DISK_NAME_LEN); |
21208ae5 DK |
3355 | if (error) { |
3356 | sdev_printk(KERN_WARNING, sdp, "SCSI disk (sd) name length exceeded.\n"); | |
f27bac27 | 3357 | goto out_free_index; |
21208ae5 | 3358 | } |
f27bac27 | 3359 | |
1da177e4 LT |
3360 | sdkp->device = sdp; |
3361 | sdkp->driver = &sd_template; | |
3362 | sdkp->disk = gd; | |
3363 | sdkp->index = index; | |
409f3499 | 3364 | atomic_set(&sdkp->openers, 0); |
9e1a1537 | 3365 | atomic_set(&sdkp->device->ioerr_cnt, 0); |
1da177e4 | 3366 | |
601e7638 JB |
3367 | if (!sdp->request_queue->rq_timeout) { |
3368 | if (sdp->type != TYPE_MOD) | |
3369 | blk_queue_rq_timeout(sdp->request_queue, SD_TIMEOUT); | |
3370 | else | |
3371 | blk_queue_rq_timeout(sdp->request_queue, | |
3372 | SD_MOD_TIMEOUT); | |
3373 | } | |
3374 | ||
3375 | device_initialize(&sdkp->dev); | |
478a8a05 | 3376 | sdkp->dev.parent = dev; |
601e7638 | 3377 | sdkp->dev.class = &sd_disk_class; |
02aa2a37 | 3378 | dev_set_name(&sdkp->dev, "%s", dev_name(dev)); |
601e7638 | 3379 | |
dee0586e DC |
3380 | error = device_add(&sdkp->dev); |
3381 | if (error) | |
601e7638 JB |
3382 | goto out_free_index; |
3383 | ||
478a8a05 AS |
3384 | get_device(dev); |
3385 | dev_set_drvdata(dev, sdkp); | |
601e7638 | 3386 | |
ea038f63 | 3387 | get_device(&sdkp->dev); /* prevent release before async_schedule */ |
a7a20d10 | 3388 | async_schedule_domain(sd_probe_async, sdkp, &scsi_sd_probe_domain); |
1da177e4 LT |
3389 | |
3390 | return 0; | |
3391 | ||
f27bac27 | 3392 | out_free_index: |
94015080 | 3393 | ida_free(&sd_index_ida, index); |
6bdaa1f1 | 3394 | out_put: |
1da177e4 | 3395 | put_disk(gd); |
f170396c CIK |
3396 | out_free: |
3397 | kfree(sdkp); | |
6bdaa1f1 | 3398 | out: |
6fe8c1db | 3399 | scsi_autopm_put_device(sdp); |
1da177e4 LT |
3400 | return error; |
3401 | } | |
3402 | ||
3403 | /** | |
3404 | * sd_remove - called whenever a scsi disk (previously recognized by | |
3405 | * sd_probe) is detached from the system. It is called (potentially | |
3406 | * multiple times) during sd module unload. | |
f2a3313d | 3407 | * @dev: pointer to device object |
1da177e4 LT |
3408 | * |
3409 | * Note: this function is invoked from the scsi mid-level. | |
3410 | * This function potentially frees up a device name (e.g. /dev/sdc) | |
3411 | * that could be re-used by a subsequent sd_probe(). | |
3412 | * This function is not called when the built-in sd driver is "exit-ed". | |
3413 | **/ | |
3414 | static int sd_remove(struct device *dev) | |
3415 | { | |
601e7638 | 3416 | struct scsi_disk *sdkp; |
0761df9c | 3417 | dev_t devt; |
1da177e4 | 3418 | |
601e7638 | 3419 | sdkp = dev_get_drvdata(dev); |
0761df9c | 3420 | devt = disk_devt(sdkp->disk); |
478a8a05 AS |
3421 | scsi_autopm_get_device(sdkp->device); |
3422 | ||
3c31b52f | 3423 | async_synchronize_full_domain(&scsi_sd_pm_domain); |
a7a20d10 | 3424 | async_synchronize_full_domain(&scsi_sd_probe_domain); |
ee959b00 | 3425 | device_del(&sdkp->dev); |
1da177e4 LT |
3426 | del_gendisk(sdkp->disk); |
3427 | sd_shutdown(dev); | |
39b7f1e2 | 3428 | |
d80210f2 CH |
3429 | free_opal_dev(sdkp->opal_dev); |
3430 | ||
0761df9c HR |
3431 | blk_register_region(devt, SD_MINORS, NULL, |
3432 | sd_default_probe, NULL, NULL); | |
3433 | ||
0b950672 | 3434 | mutex_lock(&sd_ref_mutex); |
39b7f1e2 | 3435 | dev_set_drvdata(dev, NULL); |
ee959b00 | 3436 | put_device(&sdkp->dev); |
0b950672 | 3437 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
3438 | |
3439 | return 0; | |
3440 | } | |
3441 | ||
3442 | /** | |
3443 | * scsi_disk_release - Called to free the scsi_disk structure | |
ee959b00 | 3444 | * @dev: pointer to embedded class device |
1da177e4 | 3445 | * |
0b950672 | 3446 | * sd_ref_mutex must be held entering this routine. Because it is |
1da177e4 LT |
3447 | * called on last put, you should always use the scsi_disk_get() |
3448 | * scsi_disk_put() helpers which manipulate the semaphore directly | |
ee959b00 | 3449 | * and never do a direct put_device. |
1da177e4 | 3450 | **/ |
ee959b00 | 3451 | static void scsi_disk_release(struct device *dev) |
1da177e4 | 3452 | { |
ee959b00 | 3453 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
1da177e4 LT |
3454 | struct gendisk *disk = sdkp->disk; |
3455 | ||
94015080 | 3456 | ida_free(&sd_index_ida, sdkp->index); |
c01228db | 3457 | |
1da177e4 | 3458 | disk->private_data = NULL; |
1da177e4 | 3459 | put_disk(disk); |
39b7f1e2 | 3460 | put_device(&sdkp->device->sdev_gendev); |
1da177e4 LT |
3461 | |
3462 | kfree(sdkp); | |
3463 | } | |
3464 | ||
cc5d2c8c | 3465 | static int sd_start_stop_device(struct scsi_disk *sdkp, int start) |
c3c94c5a TH |
3466 | { |
3467 | unsigned char cmd[6] = { START_STOP }; /* START_VALID */ | |
3468 | struct scsi_sense_hdr sshdr; | |
cc5d2c8c | 3469 | struct scsi_device *sdp = sdkp->device; |
c3c94c5a TH |
3470 | int res; |
3471 | ||
3472 | if (start) | |
3473 | cmd[4] |= 1; /* START */ | |
3474 | ||
d2886ea3 SR |
3475 | if (sdp->start_stop_pwr_cond) |
3476 | cmd[4] |= start ? 1 << 4 : 3 << 4; /* Active or Standby */ | |
3477 | ||
c3c94c5a TH |
3478 | if (!scsi_device_online(sdp)) |
3479 | return -ENODEV; | |
3480 | ||
fcbfffe2 CH |
3481 | res = scsi_execute(sdp, cmd, DMA_NONE, NULL, 0, NULL, &sshdr, |
3482 | SD_TIMEOUT, SD_MAX_RETRIES, 0, RQF_PM, NULL); | |
c3c94c5a | 3483 | if (res) { |
ef61329d | 3484 | sd_print_result(sdkp, "Start/Stop Unit failed", res); |
c65be1a6 | 3485 | if (driver_byte(res) == DRIVER_SENSE) |
cc5d2c8c | 3486 | sd_print_sense_hdr(sdkp, &sshdr); |
95897910 ON |
3487 | if (scsi_sense_valid(&sshdr) && |
3488 | /* 0x3a is medium not present */ | |
3489 | sshdr.asc == 0x3a) | |
3490 | res = 0; | |
c3c94c5a TH |
3491 | } |
3492 | ||
95897910 ON |
3493 | /* SCSI error codes must not go to the generic layer */ |
3494 | if (res) | |
3495 | return -EIO; | |
3496 | ||
3497 | return 0; | |
c3c94c5a TH |
3498 | } |
3499 | ||
1da177e4 LT |
3500 | /* |
3501 | * Send a SYNCHRONIZE CACHE instruction down to the device through | |
3502 | * the normal SCSI command structure. Wait for the command to | |
3503 | * complete. | |
3504 | */ | |
3505 | static void sd_shutdown(struct device *dev) | |
3506 | { | |
3d9a1f53 | 3507 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
1da177e4 LT |
3508 | |
3509 | if (!sdkp) | |
3510 | return; /* this can happen */ | |
3511 | ||
54f57588 | 3512 | if (pm_runtime_suspended(dev)) |
3d9a1f53 | 3513 | return; |
54f57588 | 3514 | |
95897910 | 3515 | if (sdkp->WCE && sdkp->media_present) { |
e73aec82 | 3516 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
4fa83244 | 3517 | sd_sync_cache(sdkp, NULL); |
39b7f1e2 | 3518 | } |
c3c94c5a | 3519 | |
cc5d2c8c JB |
3520 | if (system_state != SYSTEM_RESTART && sdkp->device->manage_start_stop) { |
3521 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); | |
3522 | sd_start_stop_device(sdkp, 0); | |
c3c94c5a | 3523 | } |
39b7f1e2 | 3524 | } |
1da177e4 | 3525 | |
95897910 | 3526 | static int sd_suspend_common(struct device *dev, bool ignore_stop_errors) |
c3c94c5a | 3527 | { |
3d9a1f53 | 3528 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
4fa83244 | 3529 | struct scsi_sense_hdr sshdr; |
09ff92fe | 3530 | int ret = 0; |
c3c94c5a | 3531 | |
13b43891 AS |
3532 | if (!sdkp) /* E.g.: runtime suspend following sd_remove() */ |
3533 | return 0; | |
c3c94c5a | 3534 | |
95897910 | 3535 | if (sdkp->WCE && sdkp->media_present) { |
cc5d2c8c | 3536 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
4fa83244 DB |
3537 | ret = sd_sync_cache(sdkp, &sshdr); |
3538 | ||
95897910 ON |
3539 | if (ret) { |
3540 | /* ignore OFFLINE device */ | |
3541 | if (ret == -ENODEV) | |
4fa83244 DB |
3542 | return 0; |
3543 | ||
3544 | if (!scsi_sense_valid(&sshdr) || | |
3545 | sshdr.sense_key != ILLEGAL_REQUEST) | |
3546 | return ret; | |
3547 | ||
3548 | /* | |
3549 | * sshdr.sense_key == ILLEGAL_REQUEST means this drive | |
3550 | * doesn't support sync. There's not much to do and | |
3551 | * suspend shouldn't fail. | |
3552 | */ | |
ed91f7ed | 3553 | ret = 0; |
95897910 | 3554 | } |
c3c94c5a TH |
3555 | } |
3556 | ||
691e3d31 | 3557 | if (sdkp->device->manage_start_stop) { |
cc5d2c8c | 3558 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); |
95897910 | 3559 | /* an error is not worth aborting a system sleep */ |
cc5d2c8c | 3560 | ret = sd_start_stop_device(sdkp, 0); |
95897910 ON |
3561 | if (ignore_stop_errors) |
3562 | ret = 0; | |
c3c94c5a TH |
3563 | } |
3564 | ||
09ff92fe | 3565 | return ret; |
c3c94c5a TH |
3566 | } |
3567 | ||
95897910 ON |
3568 | static int sd_suspend_system(struct device *dev) |
3569 | { | |
3570 | return sd_suspend_common(dev, true); | |
3571 | } | |
3572 | ||
3573 | static int sd_suspend_runtime(struct device *dev) | |
3574 | { | |
3575 | return sd_suspend_common(dev, false); | |
3576 | } | |
3577 | ||
c3c94c5a TH |
3578 | static int sd_resume(struct device *dev) |
3579 | { | |
3d9a1f53 | 3580 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
d80210f2 | 3581 | int ret; |
c3c94c5a | 3582 | |
13b43891 AS |
3583 | if (!sdkp) /* E.g.: runtime resume at the start of sd_probe() */ |
3584 | return 0; | |
3585 | ||
cc5d2c8c | 3586 | if (!sdkp->device->manage_start_stop) |
3d9a1f53 | 3587 | return 0; |
c3c94c5a | 3588 | |
cc5d2c8c | 3589 | sd_printk(KERN_NOTICE, sdkp, "Starting disk\n"); |
d80210f2 CH |
3590 | ret = sd_start_stop_device(sdkp, 1); |
3591 | if (!ret) | |
3592 | opal_unlock_from_suspend(sdkp->opal_dev); | |
3593 | return ret; | |
c3c94c5a TH |
3594 | } |
3595 | ||
1da177e4 LT |
3596 | /** |
3597 | * init_sd - entry point for this driver (both when built in or when | |
3598 | * a module). | |
3599 | * | |
3600 | * Note: this function registers this driver with the scsi mid-level. | |
3601 | **/ | |
3602 | static int __init init_sd(void) | |
3603 | { | |
5e4009ba | 3604 | int majors = 0, i, err; |
1da177e4 LT |
3605 | |
3606 | SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n")); | |
3607 | ||
0761df9c HR |
3608 | for (i = 0; i < SD_MAJORS; i++) { |
3609 | if (register_blkdev(sd_major(i), "sd") != 0) | |
3610 | continue; | |
3611 | majors++; | |
3612 | blk_register_region(sd_major(i), SD_MINORS, NULL, | |
3613 | sd_default_probe, NULL, NULL); | |
3614 | } | |
1da177e4 LT |
3615 | |
3616 | if (!majors) | |
3617 | return -ENODEV; | |
3618 | ||
5e4009ba JG |
3619 | err = class_register(&sd_disk_class); |
3620 | if (err) | |
3621 | goto err_out; | |
6bdaa1f1 | 3622 | |
4e7392ec MP |
3623 | sd_cdb_cache = kmem_cache_create("sd_ext_cdb", SD_EXT_CDB_SIZE, |
3624 | 0, 0, NULL); | |
3625 | if (!sd_cdb_cache) { | |
3626 | printk(KERN_ERR "sd: can't init extended cdb cache\n"); | |
8d964478 | 3627 | err = -ENOMEM; |
4e7392ec MP |
3628 | goto err_out_class; |
3629 | } | |
3630 | ||
3631 | sd_cdb_pool = mempool_create_slab_pool(SD_MEMPOOL_SIZE, sd_cdb_cache); | |
3632 | if (!sd_cdb_pool) { | |
3633 | printk(KERN_ERR "sd: can't init extended cdb pool\n"); | |
8d964478 | 3634 | err = -ENOMEM; |
4e7392ec MP |
3635 | goto err_out_cache; |
3636 | } | |
3637 | ||
61cce6f6 JA |
3638 | sd_page_pool = mempool_create_page_pool(SD_MEMPOOL_SIZE, 0); |
3639 | if (!sd_page_pool) { | |
3640 | printk(KERN_ERR "sd: can't init discard page pool\n"); | |
3641 | err = -ENOMEM; | |
3642 | goto err_out_ppool; | |
3643 | } | |
3644 | ||
afd5e34b JD |
3645 | err = scsi_register_driver(&sd_template.gendrv); |
3646 | if (err) | |
3647 | goto err_out_driver; | |
3648 | ||
5e4009ba JG |
3649 | return 0; |
3650 | ||
afd5e34b | 3651 | err_out_driver: |
61cce6f6 JA |
3652 | mempool_destroy(sd_page_pool); |
3653 | ||
3654 | err_out_ppool: | |
afd5e34b JD |
3655 | mempool_destroy(sd_cdb_pool); |
3656 | ||
4e7392ec MP |
3657 | err_out_cache: |
3658 | kmem_cache_destroy(sd_cdb_cache); | |
3659 | ||
5e4009ba JG |
3660 | err_out_class: |
3661 | class_unregister(&sd_disk_class); | |
3662 | err_out: | |
3663 | for (i = 0; i < SD_MAJORS; i++) | |
3664 | unregister_blkdev(sd_major(i), "sd"); | |
3665 | return err; | |
1da177e4 LT |
3666 | } |
3667 | ||
3668 | /** | |
3669 | * exit_sd - exit point for this driver (when it is a module). | |
3670 | * | |
3671 | * Note: this function unregisters this driver from the scsi mid-level. | |
3672 | **/ | |
3673 | static void __exit exit_sd(void) | |
3674 | { | |
3675 | int i; | |
3676 | ||
3677 | SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n")); | |
3678 | ||
afd5e34b | 3679 | scsi_unregister_driver(&sd_template.gendrv); |
4e7392ec | 3680 | mempool_destroy(sd_cdb_pool); |
61cce6f6 | 3681 | mempool_destroy(sd_page_pool); |
4e7392ec MP |
3682 | kmem_cache_destroy(sd_cdb_cache); |
3683 | ||
5e4009ba JG |
3684 | class_unregister(&sd_disk_class); |
3685 | ||
0761df9c HR |
3686 | for (i = 0; i < SD_MAJORS; i++) { |
3687 | blk_unregister_region(sd_major(i), SD_MINORS); | |
1da177e4 | 3688 | unregister_blkdev(sd_major(i), "sd"); |
0761df9c | 3689 | } |
1da177e4 LT |
3690 | } |
3691 | ||
1da177e4 LT |
3692 | module_init(init_sd); |
3693 | module_exit(exit_sd); | |
e73aec82 MP |
3694 | |
3695 | static void sd_print_sense_hdr(struct scsi_disk *sdkp, | |
3696 | struct scsi_sense_hdr *sshdr) | |
3697 | { | |
21045519 HR |
3698 | scsi_print_sense_hdr(sdkp->device, |
3699 | sdkp->disk ? sdkp->disk->disk_name : NULL, sshdr); | |
e73aec82 MP |
3700 | } |
3701 | ||
ef61329d HR |
3702 | static void sd_print_result(const struct scsi_disk *sdkp, const char *msg, |
3703 | int result) | |
e73aec82 | 3704 | { |
ef61329d HR |
3705 | const char *hb_string = scsi_hostbyte_string(result); |
3706 | const char *db_string = scsi_driverbyte_string(result); | |
3707 | ||
3708 | if (hb_string || db_string) | |
3709 | sd_printk(KERN_INFO, sdkp, | |
3710 | "%s: Result: hostbyte=%s driverbyte=%s\n", msg, | |
3711 | hb_string ? hb_string : "invalid", | |
3712 | db_string ? db_string : "invalid"); | |
3713 | else | |
3714 | sd_printk(KERN_INFO, sdkp, | |
3715 | "%s: Result: hostbyte=0x%02x driverbyte=0x%02x\n", | |
3716 | msg, host_byte(result), driver_byte(result)); | |
e73aec82 MP |
3717 | } |
3718 |