]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * sd.c Copyright (C) 1992 Drew Eckhardt | |
3 | * Copyright (C) 1993, 1994, 1995, 1999 Eric Youngdale | |
4 | * | |
5 | * Linux scsi disk driver | |
6 | * Initial versions: Drew Eckhardt | |
7 | * Subsequent revisions: Eric Youngdale | |
8 | * Modification history: | |
9 | * - Drew Eckhardt <drew@colorado.edu> original | |
10 | * - Eric Youngdale <eric@andante.org> add scatter-gather, multiple | |
11 | * outstanding request, and other enhancements. | |
12 | * Support loadable low-level scsi drivers. | |
13 | * - Jirka Hanika <geo@ff.cuni.cz> support more scsi disks using | |
14 | * eight major numbers. | |
15 | * - Richard Gooch <rgooch@atnf.csiro.au> support devfs. | |
16 | * - Torben Mathiasen <tmm@image.dk> Resource allocation fixes in | |
17 | * sd_init and cleanups. | |
18 | * - Alex Davis <letmein@erols.com> Fix problem where partition info | |
19 | * not being read in sd_open. Fix problem where removable media | |
20 | * could be ejected after sd_open. | |
21 | * - Douglas Gilbert <dgilbert@interlog.com> cleanup for lk 2.5.x | |
22 | * - Badari Pulavarty <pbadari@us.ibm.com>, Matthew Wilcox | |
23 | * <willy@debian.org>, Kurt Garloff <garloff@suse.de>: | |
24 | * Support 32k/1M disks. | |
25 | * | |
26 | * Logging policy (needs CONFIG_SCSI_LOGGING defined): | |
27 | * - setting up transfer: SCSI_LOG_HLQUEUE levels 1 and 2 | |
28 | * - end of transfer (bh + scsi_lib): SCSI_LOG_HLCOMPLETE level 1 | |
29 | * - entering sd_ioctl: SCSI_LOG_IOCTL level 1 | |
30 | * - entering other commands: SCSI_LOG_HLQUEUE level 3 | |
31 | * Note: when the logging level is set by the user, it must be greater | |
32 | * than the level indicated above to trigger output. | |
33 | */ | |
34 | ||
1da177e4 LT |
35 | #include <linux/module.h> |
36 | #include <linux/fs.h> | |
37 | #include <linux/kernel.h> | |
1da177e4 LT |
38 | #include <linux/mm.h> |
39 | #include <linux/bio.h> | |
40 | #include <linux/genhd.h> | |
41 | #include <linux/hdreg.h> | |
42 | #include <linux/errno.h> | |
43 | #include <linux/idr.h> | |
44 | #include <linux/interrupt.h> | |
45 | #include <linux/init.h> | |
46 | #include <linux/blkdev.h> | |
47 | #include <linux/blkpg.h> | |
1da177e4 | 48 | #include <linux/delay.h> |
0b950672 | 49 | #include <linux/mutex.h> |
7404ad3b | 50 | #include <linux/string_helpers.h> |
4ace92fc | 51 | #include <linux/async.h> |
5a0e3ad6 | 52 | #include <linux/slab.h> |
54f57588 | 53 | #include <linux/pm_runtime.h> |
924d55b0 | 54 | #include <linux/pr.h> |
8475c811 | 55 | #include <linux/t10-pi.h> |
7c0f6ba6 | 56 | #include <linux/uaccess.h> |
8f76d151 | 57 | #include <asm/unaligned.h> |
1da177e4 LT |
58 | |
59 | #include <scsi/scsi.h> | |
60 | #include <scsi/scsi_cmnd.h> | |
61 | #include <scsi/scsi_dbg.h> | |
62 | #include <scsi/scsi_device.h> | |
63 | #include <scsi/scsi_driver.h> | |
64 | #include <scsi/scsi_eh.h> | |
65 | #include <scsi/scsi_host.h> | |
66 | #include <scsi/scsi_ioctl.h> | |
1da177e4 LT |
67 | #include <scsi/scsicam.h> |
68 | ||
aa91696e | 69 | #include "sd.h" |
a7a20d10 | 70 | #include "scsi_priv.h" |
1da177e4 LT |
71 | #include "scsi_logging.h" |
72 | ||
f018fa55 RH |
73 | MODULE_AUTHOR("Eric Youngdale"); |
74 | MODULE_DESCRIPTION("SCSI disk (sd) driver"); | |
75 | MODULE_LICENSE("GPL"); | |
76 | ||
77 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK0_MAJOR); | |
78 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK1_MAJOR); | |
79 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK2_MAJOR); | |
80 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK3_MAJOR); | |
81 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK4_MAJOR); | |
82 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK5_MAJOR); | |
83 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK6_MAJOR); | |
84 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK7_MAJOR); | |
85 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK8_MAJOR); | |
86 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK9_MAJOR); | |
87 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK10_MAJOR); | |
88 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK11_MAJOR); | |
89 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK12_MAJOR); | |
90 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK13_MAJOR); | |
91 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK14_MAJOR); | |
92 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK15_MAJOR); | |
d7b8bcb0 MT |
93 | MODULE_ALIAS_SCSI_DEVICE(TYPE_DISK); |
94 | MODULE_ALIAS_SCSI_DEVICE(TYPE_MOD); | |
95 | MODULE_ALIAS_SCSI_DEVICE(TYPE_RBC); | |
89d94756 | 96 | MODULE_ALIAS_SCSI_DEVICE(TYPE_ZBC); |
f018fa55 | 97 | |
870d6656 | 98 | #if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT) |
f615b48c | 99 | #define SD_MINORS 16 |
870d6656 | 100 | #else |
3e1a7ff8 | 101 | #define SD_MINORS 0 |
870d6656 TH |
102 | #endif |
103 | ||
c98a0eb0 | 104 | static void sd_config_discard(struct scsi_disk *, unsigned int); |
5db44863 | 105 | static void sd_config_write_same(struct scsi_disk *); |
7b3d9545 | 106 | static int sd_revalidate_disk(struct gendisk *); |
72ec24bd | 107 | static void sd_unlock_native_capacity(struct gendisk *disk); |
7b3d9545 LT |
108 | static int sd_probe(struct device *); |
109 | static int sd_remove(struct device *); | |
110 | static void sd_shutdown(struct device *); | |
95897910 ON |
111 | static int sd_suspend_system(struct device *); |
112 | static int sd_suspend_runtime(struct device *); | |
7b3d9545 LT |
113 | static int sd_resume(struct device *); |
114 | static void sd_rescan(struct device *); | |
a1b73fc1 CH |
115 | static int sd_init_command(struct scsi_cmnd *SCpnt); |
116 | static void sd_uninit_command(struct scsi_cmnd *SCpnt); | |
7b3d9545 | 117 | static int sd_done(struct scsi_cmnd *); |
7a38dc0b | 118 | static void sd_eh_reset(struct scsi_cmnd *); |
2451079b | 119 | static int sd_eh_action(struct scsi_cmnd *, int); |
7b3d9545 | 120 | static void sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer); |
ee959b00 | 121 | static void scsi_disk_release(struct device *cdev); |
7b3d9545 | 122 | static void sd_print_sense_hdr(struct scsi_disk *, struct scsi_sense_hdr *); |
ef61329d | 123 | static void sd_print_result(const struct scsi_disk *, const char *, int); |
7b3d9545 | 124 | |
4034cc68 | 125 | static DEFINE_SPINLOCK(sd_index_lock); |
f27bac27 | 126 | static DEFINE_IDA(sd_index_ida); |
1da177e4 LT |
127 | |
128 | /* This semaphore is used to mediate the 0->1 reference get in the | |
129 | * face of object destruction (i.e. we can't allow a get on an | |
130 | * object after last put) */ | |
0b950672 | 131 | static DEFINE_MUTEX(sd_ref_mutex); |
1da177e4 | 132 | |
439d77f7 HS |
133 | static struct kmem_cache *sd_cdb_cache; |
134 | static mempool_t *sd_cdb_pool; | |
4e7392ec | 135 | |
6bdaa1f1 JB |
136 | static const char *sd_cache_types[] = { |
137 | "write through", "none", "write back", | |
138 | "write back, no read (daft)" | |
139 | }; | |
140 | ||
cb2fb68d VC |
141 | static void sd_set_flush_flag(struct scsi_disk *sdkp) |
142 | { | |
eb310e23 | 143 | bool wc = false, fua = false; |
cb2fb68d VC |
144 | |
145 | if (sdkp->WCE) { | |
eb310e23 | 146 | wc = true; |
cb2fb68d | 147 | if (sdkp->DPOFUA) |
eb310e23 | 148 | fua = true; |
cb2fb68d VC |
149 | } |
150 | ||
eb310e23 | 151 | blk_queue_write_cache(sdkp->disk->queue, wc, fua); |
cb2fb68d VC |
152 | } |
153 | ||
ee959b00 | 154 | static ssize_t |
e1ea2351 GKH |
155 | cache_type_store(struct device *dev, struct device_attribute *attr, |
156 | const char *buf, size_t count) | |
6bdaa1f1 JB |
157 | { |
158 | int i, ct = -1, rcd, wce, sp; | |
ee959b00 | 159 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
160 | struct scsi_device *sdp = sdkp->device; |
161 | char buffer[64]; | |
162 | char *buffer_data; | |
163 | struct scsi_mode_data data; | |
164 | struct scsi_sense_hdr sshdr; | |
2ee3e26c | 165 | static const char temp[] = "temporary "; |
6bdaa1f1 JB |
166 | int len; |
167 | ||
89d94756 | 168 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) |
6bdaa1f1 JB |
169 | /* no cache control on RBC devices; theoretically they |
170 | * can do it, but there's probably so many exceptions | |
171 | * it's not worth the risk */ | |
172 | return -EINVAL; | |
173 | ||
39c60a09 JB |
174 | if (strncmp(buf, temp, sizeof(temp) - 1) == 0) { |
175 | buf += sizeof(temp) - 1; | |
176 | sdkp->cache_override = 1; | |
177 | } else { | |
178 | sdkp->cache_override = 0; | |
179 | } | |
180 | ||
6391a113 | 181 | for (i = 0; i < ARRAY_SIZE(sd_cache_types); i++) { |
439d77f7 | 182 | len = strlen(sd_cache_types[i]); |
6bdaa1f1 JB |
183 | if (strncmp(sd_cache_types[i], buf, len) == 0 && |
184 | buf[len] == '\n') { | |
185 | ct = i; | |
186 | break; | |
187 | } | |
188 | } | |
189 | if (ct < 0) | |
190 | return -EINVAL; | |
191 | rcd = ct & 0x01 ? 1 : 0; | |
2eefd57b | 192 | wce = (ct & 0x02) && !sdkp->write_prot ? 1 : 0; |
39c60a09 JB |
193 | |
194 | if (sdkp->cache_override) { | |
195 | sdkp->WCE = wce; | |
196 | sdkp->RCD = rcd; | |
cb2fb68d | 197 | sd_set_flush_flag(sdkp); |
39c60a09 JB |
198 | return count; |
199 | } | |
200 | ||
6bdaa1f1 JB |
201 | if (scsi_mode_sense(sdp, 0x08, 8, buffer, sizeof(buffer), SD_TIMEOUT, |
202 | SD_MAX_RETRIES, &data, NULL)) | |
203 | return -EINVAL; | |
a9312fb8 | 204 | len = min_t(size_t, sizeof(buffer), data.length - data.header_length - |
6bdaa1f1 JB |
205 | data.block_descriptor_length); |
206 | buffer_data = buffer + data.header_length + | |
207 | data.block_descriptor_length; | |
208 | buffer_data[2] &= ~0x05; | |
209 | buffer_data[2] |= wce << 2 | rcd; | |
210 | sp = buffer_data[0] & 0x80 ? 1 : 0; | |
2c5d16d6 | 211 | buffer_data[0] &= ~0x80; |
6bdaa1f1 JB |
212 | |
213 | if (scsi_mode_select(sdp, 1, sp, 8, buffer_data, len, SD_TIMEOUT, | |
214 | SD_MAX_RETRIES, &data, &sshdr)) { | |
215 | if (scsi_sense_valid(&sshdr)) | |
e73aec82 | 216 | sd_print_sense_hdr(sdkp, &sshdr); |
6bdaa1f1 JB |
217 | return -EINVAL; |
218 | } | |
f98a8cae | 219 | revalidate_disk(sdkp->disk); |
6bdaa1f1 JB |
220 | return count; |
221 | } | |
222 | ||
ee959b00 | 223 | static ssize_t |
e1ea2351 GKH |
224 | manage_start_stop_show(struct device *dev, struct device_attribute *attr, |
225 | char *buf) | |
226 | { | |
227 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
228 | struct scsi_device *sdp = sdkp->device; | |
229 | ||
230 | return snprintf(buf, 20, "%u\n", sdp->manage_start_stop); | |
231 | } | |
232 | ||
233 | static ssize_t | |
234 | manage_start_stop_store(struct device *dev, struct device_attribute *attr, | |
235 | const char *buf, size_t count) | |
c3c94c5a | 236 | { |
ee959b00 | 237 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
c3c94c5a TH |
238 | struct scsi_device *sdp = sdkp->device; |
239 | ||
240 | if (!capable(CAP_SYS_ADMIN)) | |
241 | return -EACCES; | |
242 | ||
243 | sdp->manage_start_stop = simple_strtoul(buf, NULL, 10); | |
244 | ||
245 | return count; | |
246 | } | |
e1ea2351 | 247 | static DEVICE_ATTR_RW(manage_start_stop); |
c3c94c5a | 248 | |
ee959b00 | 249 | static ssize_t |
e1ea2351 GKH |
250 | allow_restart_show(struct device *dev, struct device_attribute *attr, char *buf) |
251 | { | |
252 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
253 | ||
254 | return snprintf(buf, 40, "%d\n", sdkp->device->allow_restart); | |
255 | } | |
256 | ||
257 | static ssize_t | |
258 | allow_restart_store(struct device *dev, struct device_attribute *attr, | |
259 | const char *buf, size_t count) | |
a144c5ae | 260 | { |
ee959b00 | 261 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
a144c5ae BK |
262 | struct scsi_device *sdp = sdkp->device; |
263 | ||
264 | if (!capable(CAP_SYS_ADMIN)) | |
265 | return -EACCES; | |
266 | ||
89d94756 | 267 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) |
a144c5ae BK |
268 | return -EINVAL; |
269 | ||
270 | sdp->allow_restart = simple_strtoul(buf, NULL, 10); | |
271 | ||
272 | return count; | |
273 | } | |
e1ea2351 | 274 | static DEVICE_ATTR_RW(allow_restart); |
a144c5ae | 275 | |
ee959b00 | 276 | static ssize_t |
e1ea2351 | 277 | cache_type_show(struct device *dev, struct device_attribute *attr, char *buf) |
6bdaa1f1 | 278 | { |
ee959b00 | 279 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
280 | int ct = sdkp->RCD + 2*sdkp->WCE; |
281 | ||
282 | return snprintf(buf, 40, "%s\n", sd_cache_types[ct]); | |
283 | } | |
e1ea2351 | 284 | static DEVICE_ATTR_RW(cache_type); |
6bdaa1f1 | 285 | |
ee959b00 | 286 | static ssize_t |
e1ea2351 | 287 | FUA_show(struct device *dev, struct device_attribute *attr, char *buf) |
6bdaa1f1 | 288 | { |
ee959b00 | 289 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
290 | |
291 | return snprintf(buf, 20, "%u\n", sdkp->DPOFUA); | |
292 | } | |
e1ea2351 | 293 | static DEVICE_ATTR_RO(FUA); |
6bdaa1f1 | 294 | |
ee959b00 | 295 | static ssize_t |
e1ea2351 GKH |
296 | protection_type_show(struct device *dev, struct device_attribute *attr, |
297 | char *buf) | |
e0597d70 MP |
298 | { |
299 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
300 | ||
301 | return snprintf(buf, 20, "%u\n", sdkp->protection_type); | |
302 | } | |
303 | ||
8172499a | 304 | static ssize_t |
e1ea2351 GKH |
305 | protection_type_store(struct device *dev, struct device_attribute *attr, |
306 | const char *buf, size_t count) | |
8172499a MP |
307 | { |
308 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
309 | unsigned int val; | |
310 | int err; | |
311 | ||
312 | if (!capable(CAP_SYS_ADMIN)) | |
313 | return -EACCES; | |
314 | ||
315 | err = kstrtouint(buf, 10, &val); | |
316 | ||
317 | if (err) | |
318 | return err; | |
319 | ||
8475c811 | 320 | if (val >= 0 && val <= T10_PI_TYPE3_PROTECTION) |
8172499a MP |
321 | sdkp->protection_type = val; |
322 | ||
323 | return count; | |
324 | } | |
e1ea2351 | 325 | static DEVICE_ATTR_RW(protection_type); |
8172499a | 326 | |
518fa8e3 | 327 | static ssize_t |
e1ea2351 GKH |
328 | protection_mode_show(struct device *dev, struct device_attribute *attr, |
329 | char *buf) | |
518fa8e3 MP |
330 | { |
331 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
332 | struct scsi_device *sdp = sdkp->device; | |
333 | unsigned int dif, dix; | |
334 | ||
335 | dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type); | |
336 | dix = scsi_host_dix_capable(sdp->host, sdkp->protection_type); | |
337 | ||
8475c811 | 338 | if (!dix && scsi_host_dix_capable(sdp->host, T10_PI_TYPE0_PROTECTION)) { |
518fa8e3 MP |
339 | dif = 0; |
340 | dix = 1; | |
341 | } | |
342 | ||
343 | if (!dif && !dix) | |
344 | return snprintf(buf, 20, "none\n"); | |
345 | ||
346 | return snprintf(buf, 20, "%s%u\n", dix ? "dix" : "dif", dif); | |
347 | } | |
e1ea2351 | 348 | static DEVICE_ATTR_RO(protection_mode); |
518fa8e3 | 349 | |
e0597d70 | 350 | static ssize_t |
e1ea2351 | 351 | app_tag_own_show(struct device *dev, struct device_attribute *attr, char *buf) |
e0597d70 MP |
352 | { |
353 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
354 | ||
355 | return snprintf(buf, 20, "%u\n", sdkp->ATO); | |
356 | } | |
e1ea2351 | 357 | static DEVICE_ATTR_RO(app_tag_own); |
e0597d70 | 358 | |
e339c1a7 | 359 | static ssize_t |
e1ea2351 GKH |
360 | thin_provisioning_show(struct device *dev, struct device_attribute *attr, |
361 | char *buf) | |
e339c1a7 MP |
362 | { |
363 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
364 | ||
c98a0eb0 MP |
365 | return snprintf(buf, 20, "%u\n", sdkp->lbpme); |
366 | } | |
e1ea2351 | 367 | static DEVICE_ATTR_RO(thin_provisioning); |
c98a0eb0 MP |
368 | |
369 | static const char *lbp_mode[] = { | |
370 | [SD_LBP_FULL] = "full", | |
371 | [SD_LBP_UNMAP] = "unmap", | |
372 | [SD_LBP_WS16] = "writesame_16", | |
373 | [SD_LBP_WS10] = "writesame_10", | |
374 | [SD_LBP_ZERO] = "writesame_zero", | |
375 | [SD_LBP_DISABLE] = "disabled", | |
376 | }; | |
377 | ||
378 | static ssize_t | |
e1ea2351 GKH |
379 | provisioning_mode_show(struct device *dev, struct device_attribute *attr, |
380 | char *buf) | |
c98a0eb0 MP |
381 | { |
382 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
383 | ||
384 | return snprintf(buf, 20, "%s\n", lbp_mode[sdkp->provisioning_mode]); | |
385 | } | |
386 | ||
387 | static ssize_t | |
e1ea2351 GKH |
388 | provisioning_mode_store(struct device *dev, struct device_attribute *attr, |
389 | const char *buf, size_t count) | |
c98a0eb0 MP |
390 | { |
391 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
392 | struct scsi_device *sdp = sdkp->device; | |
393 | ||
394 | if (!capable(CAP_SYS_ADMIN)) | |
395 | return -EACCES; | |
396 | ||
89d94756 HR |
397 | if (sd_is_zoned(sdkp)) { |
398 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
399 | return count; | |
400 | } | |
401 | ||
c98a0eb0 MP |
402 | if (sdp->type != TYPE_DISK) |
403 | return -EINVAL; | |
404 | ||
405 | if (!strncmp(buf, lbp_mode[SD_LBP_UNMAP], 20)) | |
406 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
407 | else if (!strncmp(buf, lbp_mode[SD_LBP_WS16], 20)) | |
408 | sd_config_discard(sdkp, SD_LBP_WS16); | |
409 | else if (!strncmp(buf, lbp_mode[SD_LBP_WS10], 20)) | |
410 | sd_config_discard(sdkp, SD_LBP_WS10); | |
411 | else if (!strncmp(buf, lbp_mode[SD_LBP_ZERO], 20)) | |
412 | sd_config_discard(sdkp, SD_LBP_ZERO); | |
413 | else if (!strncmp(buf, lbp_mode[SD_LBP_DISABLE], 20)) | |
414 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
415 | else | |
416 | return -EINVAL; | |
417 | ||
418 | return count; | |
e339c1a7 | 419 | } |
e1ea2351 | 420 | static DEVICE_ATTR_RW(provisioning_mode); |
e339c1a7 | 421 | |
18a4d0a2 | 422 | static ssize_t |
e1ea2351 GKH |
423 | max_medium_access_timeouts_show(struct device *dev, |
424 | struct device_attribute *attr, char *buf) | |
18a4d0a2 MP |
425 | { |
426 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
427 | ||
428 | return snprintf(buf, 20, "%u\n", sdkp->max_medium_access_timeouts); | |
429 | } | |
430 | ||
431 | static ssize_t | |
e1ea2351 GKH |
432 | max_medium_access_timeouts_store(struct device *dev, |
433 | struct device_attribute *attr, const char *buf, | |
434 | size_t count) | |
18a4d0a2 MP |
435 | { |
436 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
437 | int err; | |
438 | ||
439 | if (!capable(CAP_SYS_ADMIN)) | |
440 | return -EACCES; | |
441 | ||
442 | err = kstrtouint(buf, 10, &sdkp->max_medium_access_timeouts); | |
443 | ||
444 | return err ? err : count; | |
445 | } | |
e1ea2351 | 446 | static DEVICE_ATTR_RW(max_medium_access_timeouts); |
18a4d0a2 | 447 | |
5db44863 | 448 | static ssize_t |
e1ea2351 GKH |
449 | max_write_same_blocks_show(struct device *dev, struct device_attribute *attr, |
450 | char *buf) | |
5db44863 MP |
451 | { |
452 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
453 | ||
454 | return snprintf(buf, 20, "%u\n", sdkp->max_ws_blocks); | |
455 | } | |
456 | ||
457 | static ssize_t | |
e1ea2351 GKH |
458 | max_write_same_blocks_store(struct device *dev, struct device_attribute *attr, |
459 | const char *buf, size_t count) | |
5db44863 MP |
460 | { |
461 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
462 | struct scsi_device *sdp = sdkp->device; | |
463 | unsigned long max; | |
464 | int err; | |
465 | ||
466 | if (!capable(CAP_SYS_ADMIN)) | |
467 | return -EACCES; | |
468 | ||
89d94756 | 469 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) |
5db44863 MP |
470 | return -EINVAL; |
471 | ||
472 | err = kstrtoul(buf, 10, &max); | |
473 | ||
474 | if (err) | |
475 | return err; | |
476 | ||
477 | if (max == 0) | |
478 | sdp->no_write_same = 1; | |
66c28f97 MP |
479 | else if (max <= SD_MAX_WS16_BLOCKS) { |
480 | sdp->no_write_same = 0; | |
5db44863 | 481 | sdkp->max_ws_blocks = max; |
66c28f97 | 482 | } |
5db44863 MP |
483 | |
484 | sd_config_write_same(sdkp); | |
485 | ||
486 | return count; | |
487 | } | |
e1ea2351 GKH |
488 | static DEVICE_ATTR_RW(max_write_same_blocks); |
489 | ||
490 | static struct attribute *sd_disk_attrs[] = { | |
491 | &dev_attr_cache_type.attr, | |
492 | &dev_attr_FUA.attr, | |
493 | &dev_attr_allow_restart.attr, | |
494 | &dev_attr_manage_start_stop.attr, | |
495 | &dev_attr_protection_type.attr, | |
496 | &dev_attr_protection_mode.attr, | |
497 | &dev_attr_app_tag_own.attr, | |
498 | &dev_attr_thin_provisioning.attr, | |
499 | &dev_attr_provisioning_mode.attr, | |
500 | &dev_attr_max_write_same_blocks.attr, | |
501 | &dev_attr_max_medium_access_timeouts.attr, | |
502 | NULL, | |
6bdaa1f1 | 503 | }; |
e1ea2351 | 504 | ATTRIBUTE_GROUPS(sd_disk); |
6bdaa1f1 JB |
505 | |
506 | static struct class sd_disk_class = { | |
507 | .name = "scsi_disk", | |
508 | .owner = THIS_MODULE, | |
ee959b00 | 509 | .dev_release = scsi_disk_release, |
e1ea2351 | 510 | .dev_groups = sd_disk_groups, |
6bdaa1f1 | 511 | }; |
1da177e4 | 512 | |
691e3d31 | 513 | static const struct dev_pm_ops sd_pm_ops = { |
95897910 | 514 | .suspend = sd_suspend_system, |
691e3d31 | 515 | .resume = sd_resume, |
95897910 | 516 | .poweroff = sd_suspend_system, |
691e3d31 | 517 | .restore = sd_resume, |
95897910 | 518 | .runtime_suspend = sd_suspend_runtime, |
691e3d31 AL |
519 | .runtime_resume = sd_resume, |
520 | }; | |
521 | ||
1da177e4 | 522 | static struct scsi_driver sd_template = { |
1da177e4 LT |
523 | .gendrv = { |
524 | .name = "sd", | |
3af6b352 | 525 | .owner = THIS_MODULE, |
1da177e4 LT |
526 | .probe = sd_probe, |
527 | .remove = sd_remove, | |
528 | .shutdown = sd_shutdown, | |
691e3d31 | 529 | .pm = &sd_pm_ops, |
1da177e4 LT |
530 | }, |
531 | .rescan = sd_rescan, | |
a1b73fc1 CH |
532 | .init_command = sd_init_command, |
533 | .uninit_command = sd_uninit_command, | |
7b3d9545 | 534 | .done = sd_done, |
18a4d0a2 | 535 | .eh_action = sd_eh_action, |
7a38dc0b | 536 | .eh_reset = sd_eh_reset, |
1da177e4 LT |
537 | }; |
538 | ||
0761df9c HR |
539 | /* |
540 | * Dummy kobj_map->probe function. | |
541 | * The default ->probe function will call modprobe, which is | |
542 | * pointless as this module is already loaded. | |
543 | */ | |
544 | static struct kobject *sd_default_probe(dev_t devt, int *partno, void *data) | |
545 | { | |
546 | return NULL; | |
547 | } | |
548 | ||
1da177e4 LT |
549 | /* |
550 | * Device no to disk mapping: | |
551 | * | |
552 | * major disc2 disc p1 | |
553 | * |............|.............|....|....| <- dev_t | |
554 | * 31 20 19 8 7 4 3 0 | |
555 | * | |
556 | * Inside a major, we have 16k disks, however mapped non- | |
557 | * contiguously. The first 16 disks are for major0, the next | |
558 | * ones with major1, ... Disk 256 is for major0 again, disk 272 | |
559 | * for major1, ... | |
560 | * As we stay compatible with our numbering scheme, we can reuse | |
561 | * the well-know SCSI majors 8, 65--71, 136--143. | |
562 | */ | |
563 | static int sd_major(int major_idx) | |
564 | { | |
565 | switch (major_idx) { | |
566 | case 0: | |
567 | return SCSI_DISK0_MAJOR; | |
568 | case 1 ... 7: | |
569 | return SCSI_DISK1_MAJOR + major_idx - 1; | |
570 | case 8 ... 15: | |
571 | return SCSI_DISK8_MAJOR + major_idx - 8; | |
572 | default: | |
573 | BUG(); | |
574 | return 0; /* shut up gcc */ | |
575 | } | |
576 | } | |
577 | ||
3d9a1f53 | 578 | static struct scsi_disk *scsi_disk_get(struct gendisk *disk) |
1da177e4 LT |
579 | { |
580 | struct scsi_disk *sdkp = NULL; | |
581 | ||
3d9a1f53 CH |
582 | mutex_lock(&sd_ref_mutex); |
583 | ||
39b7f1e2 AS |
584 | if (disk->private_data) { |
585 | sdkp = scsi_disk(disk); | |
586 | if (scsi_device_get(sdkp->device) == 0) | |
ee959b00 | 587 | get_device(&sdkp->dev); |
39b7f1e2 AS |
588 | else |
589 | sdkp = NULL; | |
590 | } | |
0b950672 | 591 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
592 | return sdkp; |
593 | } | |
594 | ||
595 | static void scsi_disk_put(struct scsi_disk *sdkp) | |
596 | { | |
597 | struct scsi_device *sdev = sdkp->device; | |
598 | ||
0b950672 | 599 | mutex_lock(&sd_ref_mutex); |
ee959b00 | 600 | put_device(&sdkp->dev); |
1da177e4 | 601 | scsi_device_put(sdev); |
0b950672 | 602 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
603 | } |
604 | ||
c611529e MP |
605 | static unsigned char sd_setup_protect_cmnd(struct scsi_cmnd *scmd, |
606 | unsigned int dix, unsigned int dif) | |
35e1a5d9 | 607 | { |
c611529e MP |
608 | struct bio *bio = scmd->request->bio; |
609 | unsigned int prot_op = sd_prot_op(rq_data_dir(scmd->request), dix, dif); | |
610 | unsigned int protect = 0; | |
611 | ||
612 | if (dix) { /* DIX Type 0, 1, 2, 3 */ | |
613 | if (bio_integrity_flagged(bio, BIP_IP_CHECKSUM)) | |
614 | scmd->prot_flags |= SCSI_PROT_IP_CHECKSUM; | |
615 | ||
616 | if (bio_integrity_flagged(bio, BIP_CTRL_NOCHECK) == false) | |
617 | scmd->prot_flags |= SCSI_PROT_GUARD_CHECK; | |
618 | } | |
619 | ||
8475c811 | 620 | if (dif != T10_PI_TYPE3_PROTECTION) { /* DIX/DIF Type 0, 1, 2 */ |
c611529e MP |
621 | scmd->prot_flags |= SCSI_PROT_REF_INCREMENT; |
622 | ||
623 | if (bio_integrity_flagged(bio, BIP_CTRL_NOCHECK) == false) | |
624 | scmd->prot_flags |= SCSI_PROT_REF_CHECK; | |
625 | } | |
626 | ||
627 | if (dif) { /* DIX/DIF Type 1, 2, 3 */ | |
628 | scmd->prot_flags |= SCSI_PROT_TRANSFER_PI; | |
629 | ||
630 | if (bio_integrity_flagged(bio, BIP_DISK_NOCHECK)) | |
631 | protect = 3 << 5; /* Disable target PI checking */ | |
632 | else | |
633 | protect = 1 << 5; /* Enable target PI checking */ | |
35e1a5d9 MP |
634 | } |
635 | ||
636 | scsi_set_prot_op(scmd, prot_op); | |
637 | scsi_set_prot_type(scmd, dif); | |
c611529e MP |
638 | scmd->prot_flags &= sd_prot_flag_mask(prot_op); |
639 | ||
640 | return protect; | |
35e1a5d9 MP |
641 | } |
642 | ||
c98a0eb0 MP |
643 | static void sd_config_discard(struct scsi_disk *sdkp, unsigned int mode) |
644 | { | |
645 | struct request_queue *q = sdkp->disk->queue; | |
646 | unsigned int logical_block_size = sdkp->device->sector_size; | |
647 | unsigned int max_blocks = 0; | |
648 | ||
7985090a | 649 | q->limits.discard_zeroes_data = 0; |
39773722 MP |
650 | |
651 | /* | |
652 | * When LBPRZ is reported, discard alignment and granularity | |
653 | * must be fixed to the logical block size. Otherwise the block | |
654 | * layer will drop misaligned portions of the request which can | |
655 | * lead to data corruption. If LBPRZ is not set, we honor the | |
656 | * device preference. | |
657 | */ | |
658 | if (sdkp->lbprz) { | |
659 | q->limits.discard_alignment = 0; | |
6540a65d | 660 | q->limits.discard_granularity = logical_block_size; |
39773722 MP |
661 | } else { |
662 | q->limits.discard_alignment = sdkp->unmap_alignment * | |
663 | logical_block_size; | |
664 | q->limits.discard_granularity = | |
665 | max(sdkp->physical_block_size, | |
666 | sdkp->unmap_granularity * logical_block_size); | |
667 | } | |
c98a0eb0 | 668 | |
89730393 MP |
669 | sdkp->provisioning_mode = mode; |
670 | ||
c98a0eb0 MP |
671 | switch (mode) { |
672 | ||
673 | case SD_LBP_DISABLE: | |
2bb4cd5c | 674 | blk_queue_max_discard_sectors(q, 0); |
c98a0eb0 MP |
675 | queue_flag_clear_unlocked(QUEUE_FLAG_DISCARD, q); |
676 | return; | |
677 | ||
678 | case SD_LBP_UNMAP: | |
5db44863 MP |
679 | max_blocks = min_not_zero(sdkp->max_unmap_blocks, |
680 | (u32)SD_MAX_WS16_BLOCKS); | |
c98a0eb0 MP |
681 | break; |
682 | ||
683 | case SD_LBP_WS16: | |
5db44863 MP |
684 | max_blocks = min_not_zero(sdkp->max_ws_blocks, |
685 | (u32)SD_MAX_WS16_BLOCKS); | |
7985090a | 686 | q->limits.discard_zeroes_data = sdkp->lbprz; |
c98a0eb0 MP |
687 | break; |
688 | ||
689 | case SD_LBP_WS10: | |
5db44863 MP |
690 | max_blocks = min_not_zero(sdkp->max_ws_blocks, |
691 | (u32)SD_MAX_WS10_BLOCKS); | |
7985090a | 692 | q->limits.discard_zeroes_data = sdkp->lbprz; |
c98a0eb0 MP |
693 | break; |
694 | ||
695 | case SD_LBP_ZERO: | |
5db44863 MP |
696 | max_blocks = min_not_zero(sdkp->max_ws_blocks, |
697 | (u32)SD_MAX_WS10_BLOCKS); | |
c98a0eb0 MP |
698 | q->limits.discard_zeroes_data = 1; |
699 | break; | |
700 | } | |
701 | ||
2bb4cd5c | 702 | blk_queue_max_discard_sectors(q, max_blocks * (logical_block_size >> 9)); |
c98a0eb0 | 703 | queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, q); |
c98a0eb0 MP |
704 | } |
705 | ||
e339c1a7 | 706 | /** |
26e85fcd | 707 | * sd_setup_discard_cmnd - unmap blocks on thinly provisioned device |
f2a3313d | 708 | * @sdp: scsi device to operate on |
e339c1a7 MP |
709 | * @rq: Request to prepare |
710 | * | |
711 | * Will issue either UNMAP or WRITE SAME(16) depending on preference | |
712 | * indicated by target device. | |
713 | **/ | |
6a7b4398 | 714 | static int sd_setup_discard_cmnd(struct scsi_cmnd *cmd) |
e339c1a7 | 715 | { |
6a7b4398 CH |
716 | struct request *rq = cmd->request; |
717 | struct scsi_device *sdp = cmd->device; | |
e339c1a7 | 718 | struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); |
26e85fcd MP |
719 | sector_t sector = blk_rq_pos(rq); |
720 | unsigned int nr_sectors = blk_rq_sectors(rq); | |
66ac0280 | 721 | unsigned int len; |
f1126e95 | 722 | int ret; |
c98a0eb0 | 723 | char *buf; |
66ac0280 | 724 | struct page *page; |
e339c1a7 | 725 | |
26e85fcd MP |
726 | sector >>= ilog2(sdp->sector_size) - 9; |
727 | nr_sectors >>= ilog2(sdp->sector_size) - 9; | |
e339c1a7 | 728 | |
66ac0280 CH |
729 | page = alloc_page(GFP_ATOMIC | __GFP_ZERO); |
730 | if (!page) | |
731 | return BLKPREP_DEFER; | |
732 | ||
c98a0eb0 MP |
733 | switch (sdkp->provisioning_mode) { |
734 | case SD_LBP_UNMAP: | |
735 | buf = page_address(page); | |
e339c1a7 | 736 | |
6a7b4398 CH |
737 | cmd->cmd_len = 10; |
738 | cmd->cmnd[0] = UNMAP; | |
739 | cmd->cmnd[8] = 24; | |
e339c1a7 MP |
740 | |
741 | put_unaligned_be16(6 + 16, &buf[0]); | |
742 | put_unaligned_be16(16, &buf[2]); | |
743 | put_unaligned_be64(sector, &buf[8]); | |
66ac0280 | 744 | put_unaligned_be32(nr_sectors, &buf[16]); |
e339c1a7 | 745 | |
66ac0280 | 746 | len = 24; |
c98a0eb0 MP |
747 | break; |
748 | ||
749 | case SD_LBP_WS16: | |
6a7b4398 CH |
750 | cmd->cmd_len = 16; |
751 | cmd->cmnd[0] = WRITE_SAME_16; | |
752 | cmd->cmnd[1] = 0x8; /* UNMAP */ | |
753 | put_unaligned_be64(sector, &cmd->cmnd[2]); | |
754 | put_unaligned_be32(nr_sectors, &cmd->cmnd[10]); | |
66ac0280 CH |
755 | |
756 | len = sdkp->device->sector_size; | |
c98a0eb0 MP |
757 | break; |
758 | ||
759 | case SD_LBP_WS10: | |
760 | case SD_LBP_ZERO: | |
6a7b4398 CH |
761 | cmd->cmd_len = 10; |
762 | cmd->cmnd[0] = WRITE_SAME; | |
c98a0eb0 | 763 | if (sdkp->provisioning_mode == SD_LBP_WS10) |
6a7b4398 CH |
764 | cmd->cmnd[1] = 0x8; /* UNMAP */ |
765 | put_unaligned_be32(sector, &cmd->cmnd[2]); | |
766 | put_unaligned_be16(nr_sectors, &cmd->cmnd[7]); | |
c98a0eb0 MP |
767 | |
768 | len = sdkp->device->sector_size; | |
769 | break; | |
770 | ||
771 | default: | |
0fb5b1fb | 772 | ret = BLKPREP_INVALID; |
c98a0eb0 | 773 | goto out; |
e339c1a7 MP |
774 | } |
775 | ||
6a7b4398 CH |
776 | rq->timeout = SD_TIMEOUT; |
777 | ||
778 | cmd->transfersize = len; | |
e4200f8e | 779 | cmd->allowed = SD_MAX_RETRIES; |
6a7b4398 | 780 | |
f9d03f96 CH |
781 | rq->special_vec.bv_page = page; |
782 | rq->special_vec.bv_offset = 0; | |
783 | rq->special_vec.bv_len = len; | |
784 | ||
785 | rq->rq_flags |= RQF_SPECIAL_PAYLOAD; | |
82ed4db4 | 786 | scsi_req(rq)->resid_len = len; |
c98a0eb0 | 787 | |
f9d03f96 | 788 | ret = scsi_init_io(cmd); |
c98a0eb0 | 789 | out: |
b4f42e28 | 790 | if (ret != BLKPREP_OK) |
610a6349 | 791 | __free_page(page); |
f1126e95 FT |
792 | return ret; |
793 | } | |
794 | ||
5db44863 MP |
795 | static void sd_config_write_same(struct scsi_disk *sdkp) |
796 | { | |
797 | struct request_queue *q = sdkp->disk->queue; | |
798 | unsigned int logical_block_size = sdkp->device->sector_size; | |
5db44863 MP |
799 | |
800 | if (sdkp->device->no_write_same) { | |
801 | sdkp->max_ws_blocks = 0; | |
802 | goto out; | |
803 | } | |
804 | ||
805 | /* Some devices can not handle block counts above 0xffff despite | |
806 | * supporting WRITE SAME(16). Consequently we default to 64k | |
807 | * blocks per I/O unless the device explicitly advertises a | |
808 | * bigger limit. | |
809 | */ | |
66c28f97 MP |
810 | if (sdkp->max_ws_blocks > SD_MAX_WS10_BLOCKS) |
811 | sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks, | |
812 | (u32)SD_MAX_WS16_BLOCKS); | |
813 | else if (sdkp->ws16 || sdkp->ws10 || sdkp->device->no_report_opcodes) | |
814 | sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks, | |
815 | (u32)SD_MAX_WS10_BLOCKS); | |
816 | else { | |
817 | sdkp->device->no_write_same = 1; | |
818 | sdkp->max_ws_blocks = 0; | |
819 | } | |
5db44863 MP |
820 | |
821 | out: | |
66c28f97 MP |
822 | blk_queue_max_write_same_sectors(q, sdkp->max_ws_blocks * |
823 | (logical_block_size >> 9)); | |
5db44863 MP |
824 | } |
825 | ||
826 | /** | |
827 | * sd_setup_write_same_cmnd - write the same data to multiple blocks | |
59b1134c | 828 | * @cmd: command to prepare |
5db44863 MP |
829 | * |
830 | * Will issue either WRITE SAME(10) or WRITE SAME(16) depending on | |
831 | * preference indicated by target device. | |
832 | **/ | |
59b1134c | 833 | static int sd_setup_write_same_cmnd(struct scsi_cmnd *cmd) |
5db44863 | 834 | { |
59b1134c CH |
835 | struct request *rq = cmd->request; |
836 | struct scsi_device *sdp = cmd->device; | |
5db44863 MP |
837 | struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); |
838 | struct bio *bio = rq->bio; | |
839 | sector_t sector = blk_rq_pos(rq); | |
840 | unsigned int nr_sectors = blk_rq_sectors(rq); | |
08965c2e | 841 | unsigned int nr_bytes = blk_rq_bytes(rq); |
5db44863 MP |
842 | int ret; |
843 | ||
844 | if (sdkp->device->no_write_same) | |
0fb5b1fb | 845 | return BLKPREP_INVALID; |
5db44863 | 846 | |
a4ad39b1 | 847 | BUG_ON(bio_offset(bio) || bio_iovec(bio).bv_len != sdp->sector_size); |
5db44863 | 848 | |
89d94756 HR |
849 | if (sd_is_zoned(sdkp)) { |
850 | ret = sd_zbc_setup_write_cmnd(cmd); | |
851 | if (ret != BLKPREP_OK) | |
852 | return ret; | |
853 | } | |
854 | ||
5db44863 MP |
855 | sector >>= ilog2(sdp->sector_size) - 9; |
856 | nr_sectors >>= ilog2(sdp->sector_size) - 9; | |
857 | ||
5db44863 | 858 | rq->timeout = SD_WRITE_SAME_TIMEOUT; |
5db44863 MP |
859 | |
860 | if (sdkp->ws16 || sector > 0xffffffff || nr_sectors > 0xffff) { | |
59b1134c CH |
861 | cmd->cmd_len = 16; |
862 | cmd->cmnd[0] = WRITE_SAME_16; | |
863 | put_unaligned_be64(sector, &cmd->cmnd[2]); | |
864 | put_unaligned_be32(nr_sectors, &cmd->cmnd[10]); | |
5db44863 | 865 | } else { |
59b1134c CH |
866 | cmd->cmd_len = 10; |
867 | cmd->cmnd[0] = WRITE_SAME; | |
868 | put_unaligned_be32(sector, &cmd->cmnd[2]); | |
869 | put_unaligned_be16(nr_sectors, &cmd->cmnd[7]); | |
5db44863 MP |
870 | } |
871 | ||
59b1134c | 872 | cmd->transfersize = sdp->sector_size; |
a25ee548 | 873 | cmd->allowed = SD_MAX_RETRIES; |
08965c2e BVA |
874 | |
875 | /* | |
876 | * For WRITE SAME the data transferred via the DATA OUT buffer is | |
877 | * different from the amount of data actually written to the target. | |
878 | * | |
879 | * We set up __data_len to the amount of data transferred via the | |
880 | * DATA OUT buffer so that blk_rq_map_sg sets up the proper S/G list | |
881 | * to transfer a single sector of data first, but then reset it to | |
882 | * the amount of data to be written right after so that the I/O path | |
883 | * knows how much to actually write. | |
884 | */ | |
885 | rq->__data_len = sdp->sector_size; | |
886 | ret = scsi_init_io(cmd); | |
887 | rq->__data_len = nr_bytes; | |
888 | return ret; | |
5db44863 MP |
889 | } |
890 | ||
a118c6c1 | 891 | static int sd_setup_flush_cmnd(struct scsi_cmnd *cmd) |
90467c29 | 892 | { |
a118c6c1 CH |
893 | struct request *rq = cmd->request; |
894 | ||
895 | /* flush requests don't perform I/O, zero the S/G table */ | |
896 | memset(&cmd->sdb, 0, sizeof(cmd->sdb)); | |
90467c29 | 897 | |
a118c6c1 CH |
898 | cmd->cmnd[0] = SYNCHRONIZE_CACHE; |
899 | cmd->cmd_len = 10; | |
900 | cmd->transfersize = 0; | |
901 | cmd->allowed = SD_MAX_RETRIES; | |
902 | ||
26b9fd8b | 903 | rq->timeout = rq->q->rq_timeout * SD_FLUSH_TIMEOUT_MULTIPLIER; |
a118c6c1 | 904 | return BLKPREP_OK; |
90467c29 FT |
905 | } |
906 | ||
87949eee | 907 | static int sd_setup_read_write_cmnd(struct scsi_cmnd *SCpnt) |
1da177e4 | 908 | { |
a1b73fc1 CH |
909 | struct request *rq = SCpnt->request; |
910 | struct scsi_device *sdp = SCpnt->device; | |
776b23a0 | 911 | struct gendisk *disk = rq->rq_disk; |
89d94756 | 912 | struct scsi_disk *sdkp = scsi_disk(disk); |
83096ebf | 913 | sector_t block = blk_rq_pos(rq); |
18351070 | 914 | sector_t threshold; |
83096ebf | 915 | unsigned int this_count = blk_rq_sectors(rq); |
c611529e | 916 | unsigned int dif, dix; |
89d94756 | 917 | bool zoned_write = sd_is_zoned(sdkp) && rq_data_dir(rq) == WRITE; |
c611529e | 918 | int ret; |
4e7392ec | 919 | unsigned char protect; |
7f9a6bc4 | 920 | |
89d94756 HR |
921 | if (zoned_write) { |
922 | ret = sd_zbc_setup_write_cmnd(SCpnt); | |
923 | if (ret != BLKPREP_OK) | |
924 | return ret; | |
925 | } | |
926 | ||
3c356bde | 927 | ret = scsi_init_io(SCpnt); |
7f9a6bc4 JB |
928 | if (ret != BLKPREP_OK) |
929 | goto out; | |
930 | SCpnt = rq->special; | |
931 | ||
932 | /* from here on until we're complete, any goto out | |
933 | * is used for a killable error condition */ | |
934 | ret = BLKPREP_KILL; | |
1da177e4 | 935 | |
a1b73fc1 CH |
936 | SCSI_LOG_HLQUEUE(1, |
937 | scmd_printk(KERN_INFO, SCpnt, | |
938 | "%s: block=%llu, count=%d\n", | |
939 | __func__, (unsigned long long)block, this_count)); | |
1da177e4 LT |
940 | |
941 | if (!sdp || !scsi_device_online(sdp) || | |
83096ebf | 942 | block + blk_rq_sectors(rq) > get_capacity(disk)) { |
fa0d34be | 943 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
83096ebf TH |
944 | "Finishing %u sectors\n", |
945 | blk_rq_sectors(rq))); | |
fa0d34be MP |
946 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
947 | "Retry with 0x%p\n", SCpnt)); | |
7f9a6bc4 | 948 | goto out; |
1da177e4 LT |
949 | } |
950 | ||
951 | if (sdp->changed) { | |
952 | /* | |
953 | * quietly refuse to do anything to a changed disc until | |
954 | * the changed bit has been reset | |
955 | */ | |
3ff5588d | 956 | /* printk("SCSI disk has been changed or is not present. Prohibiting further I/O.\n"); */ |
7f9a6bc4 | 957 | goto out; |
1da177e4 | 958 | } |
7f9a6bc4 | 959 | |
a0899d4d | 960 | /* |
18351070 LT |
961 | * Some SD card readers can't handle multi-sector accesses which touch |
962 | * the last one or two hardware sectors. Split accesses as needed. | |
a0899d4d | 963 | */ |
18351070 LT |
964 | threshold = get_capacity(disk) - SD_LAST_BUGGY_SECTORS * |
965 | (sdp->sector_size / 512); | |
966 | ||
967 | if (unlikely(sdp->last_sector_bug && block + this_count > threshold)) { | |
968 | if (block < threshold) { | |
969 | /* Access up to the threshold but not beyond */ | |
970 | this_count = threshold - block; | |
971 | } else { | |
972 | /* Access only a single hardware sector */ | |
973 | this_count = sdp->sector_size / 512; | |
974 | } | |
975 | } | |
a0899d4d | 976 | |
fa0d34be MP |
977 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, "block=%llu\n", |
978 | (unsigned long long)block)); | |
1da177e4 LT |
979 | |
980 | /* | |
981 | * If we have a 1K hardware sectorsize, prevent access to single | |
982 | * 512 byte sectors. In theory we could handle this - in fact | |
983 | * the scsi cdrom driver must be able to handle this because | |
984 | * we typically use 1K blocksizes, and cdroms typically have | |
985 | * 2K hardware sectorsizes. Of course, things are simpler | |
986 | * with the cdrom, since it is read-only. For performance | |
987 | * reasons, the filesystems should be able to handle this | |
988 | * and not force the scsi disk driver to use bounce buffers | |
989 | * for this. | |
990 | */ | |
991 | if (sdp->sector_size == 1024) { | |
83096ebf | 992 | if ((block & 1) || (blk_rq_sectors(rq) & 1)) { |
e73aec82 MP |
993 | scmd_printk(KERN_ERR, SCpnt, |
994 | "Bad block number requested\n"); | |
7f9a6bc4 | 995 | goto out; |
1da177e4 LT |
996 | } else { |
997 | block = block >> 1; | |
998 | this_count = this_count >> 1; | |
999 | } | |
1000 | } | |
1001 | if (sdp->sector_size == 2048) { | |
83096ebf | 1002 | if ((block & 3) || (blk_rq_sectors(rq) & 3)) { |
e73aec82 MP |
1003 | scmd_printk(KERN_ERR, SCpnt, |
1004 | "Bad block number requested\n"); | |
7f9a6bc4 | 1005 | goto out; |
1da177e4 LT |
1006 | } else { |
1007 | block = block >> 2; | |
1008 | this_count = this_count >> 2; | |
1009 | } | |
1010 | } | |
1011 | if (sdp->sector_size == 4096) { | |
83096ebf | 1012 | if ((block & 7) || (blk_rq_sectors(rq) & 7)) { |
e73aec82 MP |
1013 | scmd_printk(KERN_ERR, SCpnt, |
1014 | "Bad block number requested\n"); | |
7f9a6bc4 | 1015 | goto out; |
1da177e4 LT |
1016 | } else { |
1017 | block = block >> 3; | |
1018 | this_count = this_count >> 3; | |
1019 | } | |
1020 | } | |
1021 | if (rq_data_dir(rq) == WRITE) { | |
1da177e4 | 1022 | SCpnt->cmnd[0] = WRITE_6; |
af55ff67 | 1023 | |
8c579ab6 | 1024 | if (blk_integrity_rq(rq)) |
c611529e | 1025 | sd_dif_prepare(SCpnt); |
af55ff67 | 1026 | |
1da177e4 LT |
1027 | } else if (rq_data_dir(rq) == READ) { |
1028 | SCpnt->cmnd[0] = READ_6; | |
1da177e4 | 1029 | } else { |
ef295ecf | 1030 | scmd_printk(KERN_ERR, SCpnt, "Unknown command %d\n", req_op(rq)); |
7f9a6bc4 | 1031 | goto out; |
1da177e4 LT |
1032 | } |
1033 | ||
fa0d34be | 1034 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
83096ebf | 1035 | "%s %d/%u 512 byte blocks.\n", |
fa0d34be MP |
1036 | (rq_data_dir(rq) == WRITE) ? |
1037 | "writing" : "reading", this_count, | |
83096ebf | 1038 | blk_rq_sectors(rq))); |
1da177e4 | 1039 | |
c611529e MP |
1040 | dix = scsi_prot_sg_count(SCpnt); |
1041 | dif = scsi_host_dif_capable(SCpnt->device->host, sdkp->protection_type); | |
1042 | ||
1043 | if (dif || dix) | |
1044 | protect = sd_setup_protect_cmnd(SCpnt, dix, dif); | |
af55ff67 | 1045 | else |
4e7392ec MP |
1046 | protect = 0; |
1047 | ||
8475c811 | 1048 | if (protect && sdkp->protection_type == T10_PI_TYPE2_PROTECTION) { |
4e7392ec MP |
1049 | SCpnt->cmnd = mempool_alloc(sd_cdb_pool, GFP_ATOMIC); |
1050 | ||
1051 | if (unlikely(SCpnt->cmnd == NULL)) { | |
1052 | ret = BLKPREP_DEFER; | |
1053 | goto out; | |
1054 | } | |
af55ff67 | 1055 | |
4e7392ec MP |
1056 | SCpnt->cmd_len = SD_EXT_CDB_SIZE; |
1057 | memset(SCpnt->cmnd, 0, SCpnt->cmd_len); | |
1058 | SCpnt->cmnd[0] = VARIABLE_LENGTH_CMD; | |
1059 | SCpnt->cmnd[7] = 0x18; | |
1060 | SCpnt->cmnd[9] = (rq_data_dir(rq) == READ) ? READ_32 : WRITE_32; | |
33659ebb | 1061 | SCpnt->cmnd[10] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
4e7392ec MP |
1062 | |
1063 | /* LBA */ | |
1064 | SCpnt->cmnd[12] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0; | |
1065 | SCpnt->cmnd[13] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0; | |
1066 | SCpnt->cmnd[14] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0; | |
1067 | SCpnt->cmnd[15] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0; | |
1068 | SCpnt->cmnd[16] = (unsigned char) (block >> 24) & 0xff; | |
1069 | SCpnt->cmnd[17] = (unsigned char) (block >> 16) & 0xff; | |
1070 | SCpnt->cmnd[18] = (unsigned char) (block >> 8) & 0xff; | |
1071 | SCpnt->cmnd[19] = (unsigned char) block & 0xff; | |
1072 | ||
1073 | /* Expected Indirect LBA */ | |
1074 | SCpnt->cmnd[20] = (unsigned char) (block >> 24) & 0xff; | |
1075 | SCpnt->cmnd[21] = (unsigned char) (block >> 16) & 0xff; | |
1076 | SCpnt->cmnd[22] = (unsigned char) (block >> 8) & 0xff; | |
1077 | SCpnt->cmnd[23] = (unsigned char) block & 0xff; | |
1078 | ||
1079 | /* Transfer length */ | |
1080 | SCpnt->cmnd[28] = (unsigned char) (this_count >> 24) & 0xff; | |
1081 | SCpnt->cmnd[29] = (unsigned char) (this_count >> 16) & 0xff; | |
1082 | SCpnt->cmnd[30] = (unsigned char) (this_count >> 8) & 0xff; | |
1083 | SCpnt->cmnd[31] = (unsigned char) this_count & 0xff; | |
e430cbc8 | 1084 | } else if (sdp->use_16_for_rw || (this_count > 0xffff)) { |
1da177e4 | 1085 | SCpnt->cmnd[0] += READ_16 - READ_6; |
33659ebb | 1086 | SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
1da177e4 LT |
1087 | SCpnt->cmnd[2] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0; |
1088 | SCpnt->cmnd[3] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0; | |
1089 | SCpnt->cmnd[4] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0; | |
1090 | SCpnt->cmnd[5] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0; | |
1091 | SCpnt->cmnd[6] = (unsigned char) (block >> 24) & 0xff; | |
1092 | SCpnt->cmnd[7] = (unsigned char) (block >> 16) & 0xff; | |
1093 | SCpnt->cmnd[8] = (unsigned char) (block >> 8) & 0xff; | |
1094 | SCpnt->cmnd[9] = (unsigned char) block & 0xff; | |
1095 | SCpnt->cmnd[10] = (unsigned char) (this_count >> 24) & 0xff; | |
1096 | SCpnt->cmnd[11] = (unsigned char) (this_count >> 16) & 0xff; | |
1097 | SCpnt->cmnd[12] = (unsigned char) (this_count >> 8) & 0xff; | |
1098 | SCpnt->cmnd[13] = (unsigned char) this_count & 0xff; | |
1099 | SCpnt->cmnd[14] = SCpnt->cmnd[15] = 0; | |
1100 | } else if ((this_count > 0xff) || (block > 0x1fffff) || | |
af55ff67 | 1101 | scsi_device_protection(SCpnt->device) || |
1da177e4 | 1102 | SCpnt->device->use_10_for_rw) { |
1da177e4 | 1103 | SCpnt->cmnd[0] += READ_10 - READ_6; |
33659ebb | 1104 | SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0); |
1da177e4 LT |
1105 | SCpnt->cmnd[2] = (unsigned char) (block >> 24) & 0xff; |
1106 | SCpnt->cmnd[3] = (unsigned char) (block >> 16) & 0xff; | |
1107 | SCpnt->cmnd[4] = (unsigned char) (block >> 8) & 0xff; | |
1108 | SCpnt->cmnd[5] = (unsigned char) block & 0xff; | |
1109 | SCpnt->cmnd[6] = SCpnt->cmnd[9] = 0; | |
1110 | SCpnt->cmnd[7] = (unsigned char) (this_count >> 8) & 0xff; | |
1111 | SCpnt->cmnd[8] = (unsigned char) this_count & 0xff; | |
1112 | } else { | |
33659ebb | 1113 | if (unlikely(rq->cmd_flags & REQ_FUA)) { |
007365ad TH |
1114 | /* |
1115 | * This happens only if this drive failed | |
1116 | * 10byte rw command with ILLEGAL_REQUEST | |
1117 | * during operation and thus turned off | |
1118 | * use_10_for_rw. | |
1119 | */ | |
e73aec82 MP |
1120 | scmd_printk(KERN_ERR, SCpnt, |
1121 | "FUA write on READ/WRITE(6) drive\n"); | |
7f9a6bc4 | 1122 | goto out; |
007365ad TH |
1123 | } |
1124 | ||
1da177e4 LT |
1125 | SCpnt->cmnd[1] |= (unsigned char) ((block >> 16) & 0x1f); |
1126 | SCpnt->cmnd[2] = (unsigned char) ((block >> 8) & 0xff); | |
1127 | SCpnt->cmnd[3] = (unsigned char) block & 0xff; | |
1128 | SCpnt->cmnd[4] = (unsigned char) this_count; | |
1129 | SCpnt->cmnd[5] = 0; | |
1130 | } | |
30b0c37b | 1131 | SCpnt->sdb.length = this_count * sdp->sector_size; |
1da177e4 LT |
1132 | |
1133 | /* | |
1134 | * We shouldn't disconnect in the middle of a sector, so with a dumb | |
1135 | * host adapter, it's safe to assume that we can at least transfer | |
1136 | * this many bytes between each connect / disconnect. | |
1137 | */ | |
1138 | SCpnt->transfersize = sdp->sector_size; | |
1139 | SCpnt->underflow = this_count << 9; | |
1140 | SCpnt->allowed = SD_MAX_RETRIES; | |
1da177e4 | 1141 | |
1da177e4 LT |
1142 | /* |
1143 | * This indicates that the command is ready from our end to be | |
1144 | * queued. | |
1145 | */ | |
7f9a6bc4 JB |
1146 | ret = BLKPREP_OK; |
1147 | out: | |
89d94756 HR |
1148 | if (zoned_write && ret != BLKPREP_OK) |
1149 | sd_zbc_cancel_write_cmnd(SCpnt); | |
1150 | ||
a1b73fc1 | 1151 | return ret; |
1da177e4 LT |
1152 | } |
1153 | ||
87949eee CH |
1154 | static int sd_init_command(struct scsi_cmnd *cmd) |
1155 | { | |
1156 | struct request *rq = cmd->request; | |
1157 | ||
c2df40df MC |
1158 | switch (req_op(rq)) { |
1159 | case REQ_OP_DISCARD: | |
87949eee | 1160 | return sd_setup_discard_cmnd(cmd); |
c2df40df | 1161 | case REQ_OP_WRITE_SAME: |
87949eee | 1162 | return sd_setup_write_same_cmnd(cmd); |
3a5e02ce | 1163 | case REQ_OP_FLUSH: |
87949eee | 1164 | return sd_setup_flush_cmnd(cmd); |
c2df40df MC |
1165 | case REQ_OP_READ: |
1166 | case REQ_OP_WRITE: | |
87949eee | 1167 | return sd_setup_read_write_cmnd(cmd); |
89d94756 HR |
1168 | case REQ_OP_ZONE_REPORT: |
1169 | return sd_zbc_setup_report_cmnd(cmd); | |
1170 | case REQ_OP_ZONE_RESET: | |
1171 | return sd_zbc_setup_reset_cmnd(cmd); | |
c2df40df MC |
1172 | default: |
1173 | BUG(); | |
1174 | } | |
87949eee CH |
1175 | } |
1176 | ||
1177 | static void sd_uninit_command(struct scsi_cmnd *SCpnt) | |
1178 | { | |
1179 | struct request *rq = SCpnt->request; | |
1180 | ||
f9d03f96 CH |
1181 | if (rq->rq_flags & RQF_SPECIAL_PAYLOAD) |
1182 | __free_page(rq->special_vec.bv_page); | |
87949eee | 1183 | |
82ed4db4 | 1184 | if (SCpnt->cmnd != scsi_req(rq)->cmd) { |
87949eee CH |
1185 | mempool_free(SCpnt->cmnd, sd_cdb_pool); |
1186 | SCpnt->cmnd = NULL; | |
1187 | SCpnt->cmd_len = 0; | |
1188 | } | |
1189 | } | |
1190 | ||
1da177e4 LT |
1191 | /** |
1192 | * sd_open - open a scsi disk device | |
1193 | * @inode: only i_rdev member may be used | |
1194 | * @filp: only f_mode and f_flags may be used | |
1195 | * | |
1196 | * Returns 0 if successful. Returns a negated errno value in case | |
1197 | * of error. | |
1198 | * | |
1199 | * Note: This can be called from a user context (e.g. fsck(1) ) | |
1200 | * or from within the kernel (e.g. as a result of a mount(1) ). | |
1201 | * In the latter case @inode and @filp carry an abridged amount | |
1202 | * of information as noted above. | |
409f3499 AB |
1203 | * |
1204 | * Locking: called with bdev->bd_mutex held. | |
1da177e4 | 1205 | **/ |
0338e291 | 1206 | static int sd_open(struct block_device *bdev, fmode_t mode) |
1da177e4 | 1207 | { |
0338e291 | 1208 | struct scsi_disk *sdkp = scsi_disk_get(bdev->bd_disk); |
1da177e4 LT |
1209 | struct scsi_device *sdev; |
1210 | int retval; | |
1211 | ||
0338e291 | 1212 | if (!sdkp) |
1da177e4 LT |
1213 | return -ENXIO; |
1214 | ||
fa0d34be | 1215 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_open\n")); |
1da177e4 LT |
1216 | |
1217 | sdev = sdkp->device; | |
1218 | ||
1219 | /* | |
1220 | * If the device is in error recovery, wait until it is done. | |
1221 | * If the device is offline, then disallow any access to it. | |
1222 | */ | |
1223 | retval = -ENXIO; | |
1224 | if (!scsi_block_when_processing_errors(sdev)) | |
1225 | goto error_out; | |
1226 | ||
1227 | if (sdev->removable || sdkp->write_prot) | |
0338e291 | 1228 | check_disk_change(bdev); |
1da177e4 LT |
1229 | |
1230 | /* | |
1231 | * If the drive is empty, just let the open fail. | |
1232 | */ | |
1233 | retval = -ENOMEDIUM; | |
0338e291 | 1234 | if (sdev->removable && !sdkp->media_present && !(mode & FMODE_NDELAY)) |
1da177e4 LT |
1235 | goto error_out; |
1236 | ||
1237 | /* | |
1238 | * If the device has the write protect tab set, have the open fail | |
1239 | * if the user expects to be able to write to the thing. | |
1240 | */ | |
1241 | retval = -EROFS; | |
0338e291 | 1242 | if (sdkp->write_prot && (mode & FMODE_WRITE)) |
1da177e4 LT |
1243 | goto error_out; |
1244 | ||
1245 | /* | |
1246 | * It is possible that the disk changing stuff resulted in | |
1247 | * the device being taken offline. If this is the case, | |
1248 | * report this to the user, and don't pretend that the | |
1249 | * open actually succeeded. | |
1250 | */ | |
1251 | retval = -ENXIO; | |
1252 | if (!scsi_device_online(sdev)) | |
1253 | goto error_out; | |
1254 | ||
409f3499 | 1255 | if ((atomic_inc_return(&sdkp->openers) == 1) && sdev->removable) { |
1da177e4 LT |
1256 | if (scsi_block_when_processing_errors(sdev)) |
1257 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT); | |
1258 | } | |
1259 | ||
1260 | return 0; | |
1261 | ||
1262 | error_out: | |
1263 | scsi_disk_put(sdkp); | |
1264 | return retval; | |
1265 | } | |
1266 | ||
1267 | /** | |
1268 | * sd_release - invoked when the (last) close(2) is called on this | |
1269 | * scsi disk. | |
1270 | * @inode: only i_rdev member may be used | |
1271 | * @filp: only f_mode and f_flags may be used | |
1272 | * | |
1273 | * Returns 0. | |
1274 | * | |
1275 | * Note: may block (uninterruptible) if error recovery is underway | |
1276 | * on this disk. | |
409f3499 AB |
1277 | * |
1278 | * Locking: called with bdev->bd_mutex held. | |
1da177e4 | 1279 | **/ |
db2a144b | 1280 | static void sd_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 1281 | { |
1da177e4 LT |
1282 | struct scsi_disk *sdkp = scsi_disk(disk); |
1283 | struct scsi_device *sdev = sdkp->device; | |
1284 | ||
56937f7b | 1285 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_release\n")); |
1da177e4 | 1286 | |
7e443312 | 1287 | if (atomic_dec_return(&sdkp->openers) == 0 && sdev->removable) { |
1da177e4 LT |
1288 | if (scsi_block_when_processing_errors(sdev)) |
1289 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW); | |
1290 | } | |
1291 | ||
1292 | /* | |
1293 | * XXX and what if there are packets in flight and this close() | |
1294 | * XXX is followed by a "rmmod sd_mod"? | |
1295 | */ | |
478a8a05 | 1296 | |
1da177e4 | 1297 | scsi_disk_put(sdkp); |
1da177e4 LT |
1298 | } |
1299 | ||
a885c8c4 | 1300 | static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
1da177e4 LT |
1301 | { |
1302 | struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk); | |
1303 | struct scsi_device *sdp = sdkp->device; | |
1304 | struct Scsi_Host *host = sdp->host; | |
f08bb1e0 | 1305 | sector_t capacity = logical_to_sectors(sdp, sdkp->capacity); |
1da177e4 LT |
1306 | int diskinfo[4]; |
1307 | ||
1308 | /* default to most commonly used values */ | |
f08bb1e0 MP |
1309 | diskinfo[0] = 0x40; /* 1 << 6 */ |
1310 | diskinfo[1] = 0x20; /* 1 << 5 */ | |
1311 | diskinfo[2] = capacity >> 11; | |
1312 | ||
1da177e4 LT |
1313 | /* override with calculated, extended default, or driver values */ |
1314 | if (host->hostt->bios_param) | |
f08bb1e0 | 1315 | host->hostt->bios_param(sdp, bdev, capacity, diskinfo); |
1da177e4 | 1316 | else |
f08bb1e0 | 1317 | scsicam_bios_param(bdev, capacity, diskinfo); |
1da177e4 | 1318 | |
a885c8c4 CH |
1319 | geo->heads = diskinfo[0]; |
1320 | geo->sectors = diskinfo[1]; | |
1321 | geo->cylinders = diskinfo[2]; | |
1da177e4 LT |
1322 | return 0; |
1323 | } | |
1324 | ||
1325 | /** | |
1326 | * sd_ioctl - process an ioctl | |
1327 | * @inode: only i_rdev/i_bdev members may be used | |
1328 | * @filp: only f_mode and f_flags may be used | |
1329 | * @cmd: ioctl command number | |
1330 | * @arg: this is third argument given to ioctl(2) system call. | |
1331 | * Often contains a pointer. | |
1332 | * | |
25985edc | 1333 | * Returns 0 if successful (some ioctls return positive numbers on |
1da177e4 LT |
1334 | * success as well). Returns a negated errno value in case of error. |
1335 | * | |
1336 | * Note: most ioctls are forward onto the block subsystem or further | |
3a4fa0a2 | 1337 | * down in the scsi subsystem. |
1da177e4 | 1338 | **/ |
0338e291 | 1339 | static int sd_ioctl(struct block_device *bdev, fmode_t mode, |
1da177e4 LT |
1340 | unsigned int cmd, unsigned long arg) |
1341 | { | |
1da177e4 | 1342 | struct gendisk *disk = bdev->bd_disk; |
fe2d1851 NN |
1343 | struct scsi_disk *sdkp = scsi_disk(disk); |
1344 | struct scsi_device *sdp = sdkp->device; | |
1da177e4 LT |
1345 | void __user *p = (void __user *)arg; |
1346 | int error; | |
1347 | ||
fe2d1851 NN |
1348 | SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO, sdkp, "sd_ioctl: disk=%s, " |
1349 | "cmd=0x%x\n", disk->disk_name, cmd)); | |
1da177e4 | 1350 | |
0bfc96cb PB |
1351 | error = scsi_verify_blk_ioctl(bdev, cmd); |
1352 | if (error < 0) | |
1353 | return error; | |
1354 | ||
1da177e4 LT |
1355 | /* |
1356 | * If we are in the middle of error recovery, don't let anyone | |
1357 | * else try and use this device. Also, if error recovery fails, it | |
1358 | * may try and take the device offline, in which case all further | |
1359 | * access to the device is prohibited. | |
1360 | */ | |
906d15fb CH |
1361 | error = scsi_ioctl_block_when_processing_errors(sdp, cmd, |
1362 | (mode & FMODE_NDELAY) != 0); | |
1363 | if (error) | |
8a6cfeb6 | 1364 | goto out; |
1da177e4 | 1365 | |
1da177e4 LT |
1366 | /* |
1367 | * Send SCSI addressing ioctls directly to mid level, send other | |
1368 | * ioctls to block level and then onto mid level if they can't be | |
1369 | * resolved. | |
1370 | */ | |
1371 | switch (cmd) { | |
1372 | case SCSI_IOCTL_GET_IDLUN: | |
1373 | case SCSI_IOCTL_GET_BUS_NUMBER: | |
8a6cfeb6 AB |
1374 | error = scsi_ioctl(sdp, cmd, p); |
1375 | break; | |
1da177e4 | 1376 | default: |
577ebb37 | 1377 | error = scsi_cmd_blk_ioctl(bdev, mode, cmd, p); |
1da177e4 | 1378 | if (error != -ENOTTY) |
8a6cfeb6 AB |
1379 | break; |
1380 | error = scsi_ioctl(sdp, cmd, p); | |
1381 | break; | |
1da177e4 | 1382 | } |
8a6cfeb6 | 1383 | out: |
8a6cfeb6 | 1384 | return error; |
1da177e4 LT |
1385 | } |
1386 | ||
1387 | static void set_media_not_present(struct scsi_disk *sdkp) | |
1388 | { | |
2bae0093 TH |
1389 | if (sdkp->media_present) |
1390 | sdkp->device->changed = 1; | |
1391 | ||
1392 | if (sdkp->device->removable) { | |
1393 | sdkp->media_present = 0; | |
1394 | sdkp->capacity = 0; | |
1395 | } | |
1396 | } | |
1397 | ||
1398 | static int media_not_present(struct scsi_disk *sdkp, | |
1399 | struct scsi_sense_hdr *sshdr) | |
1400 | { | |
1401 | if (!scsi_sense_valid(sshdr)) | |
1402 | return 0; | |
1403 | ||
1404 | /* not invoked for commands that could return deferred errors */ | |
1405 | switch (sshdr->sense_key) { | |
1406 | case UNIT_ATTENTION: | |
1407 | case NOT_READY: | |
1408 | /* medium not present */ | |
1409 | if (sshdr->asc == 0x3A) { | |
1410 | set_media_not_present(sdkp); | |
1411 | return 1; | |
1412 | } | |
1413 | } | |
1414 | return 0; | |
1da177e4 LT |
1415 | } |
1416 | ||
1417 | /** | |
2bae0093 TH |
1418 | * sd_check_events - check media events |
1419 | * @disk: kernel device descriptor | |
1420 | * @clearing: disk events currently being cleared | |
1da177e4 | 1421 | * |
2bae0093 | 1422 | * Returns mask of DISK_EVENT_*. |
1da177e4 LT |
1423 | * |
1424 | * Note: this function is invoked from the block subsystem. | |
1425 | **/ | |
2bae0093 | 1426 | static unsigned int sd_check_events(struct gendisk *disk, unsigned int clearing) |
1da177e4 | 1427 | { |
eb72d0bb HR |
1428 | struct scsi_disk *sdkp = scsi_disk_get(disk); |
1429 | struct scsi_device *sdp; | |
1da177e4 LT |
1430 | int retval; |
1431 | ||
eb72d0bb HR |
1432 | if (!sdkp) |
1433 | return 0; | |
1434 | ||
1435 | sdp = sdkp->device; | |
2bae0093 | 1436 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_check_events\n")); |
1da177e4 LT |
1437 | |
1438 | /* | |
1439 | * If the device is offline, don't send any commands - just pretend as | |
1440 | * if the command failed. If the device ever comes back online, we | |
1441 | * can deal with it then. It is only because of unrecoverable errors | |
1442 | * that we would ever take a device offline in the first place. | |
1443 | */ | |
285e9670 KS |
1444 | if (!scsi_device_online(sdp)) { |
1445 | set_media_not_present(sdkp); | |
285e9670 KS |
1446 | goto out; |
1447 | } | |
1da177e4 LT |
1448 | |
1449 | /* | |
1450 | * Using TEST_UNIT_READY enables differentiation between drive with | |
1451 | * no cartridge loaded - NOT READY, drive with changed cartridge - | |
1452 | * UNIT ATTENTION, or with same cartridge - GOOD STATUS. | |
1453 | * | |
1454 | * Drives that auto spin down. eg iomega jaz 1G, will be started | |
1455 | * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever | |
1456 | * sd_revalidate() is called. | |
1457 | */ | |
001aac25 | 1458 | if (scsi_block_when_processing_errors(sdp)) { |
6fa2b8f9 CH |
1459 | struct scsi_sense_hdr sshdr = { 0, }; |
1460 | ||
001aac25 | 1461 | retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, SD_MAX_RETRIES, |
6fa2b8f9 | 1462 | &sshdr); |
1da177e4 | 1463 | |
6fa2b8f9 CH |
1464 | /* failed to execute TUR, assume media not present */ |
1465 | if (host_byte(retval)) { | |
1466 | set_media_not_present(sdkp); | |
1467 | goto out; | |
1468 | } | |
1da177e4 | 1469 | |
6fa2b8f9 CH |
1470 | if (media_not_present(sdkp, &sshdr)) |
1471 | goto out; | |
1472 | } | |
2bae0093 | 1473 | |
1da177e4 LT |
1474 | /* |
1475 | * For removable scsi disk we have to recognise the presence | |
2bae0093 | 1476 | * of a disk in the drive. |
1da177e4 | 1477 | */ |
2bae0093 TH |
1478 | if (!sdkp->media_present) |
1479 | sdp->changed = 1; | |
1da177e4 | 1480 | sdkp->media_present = 1; |
285e9670 | 1481 | out: |
3ff5588d | 1482 | /* |
2bae0093 | 1483 | * sdp->changed is set under the following conditions: |
3ff5588d | 1484 | * |
2bae0093 TH |
1485 | * Medium present state has changed in either direction. |
1486 | * Device has indicated UNIT_ATTENTION. | |
3ff5588d | 1487 | */ |
2bae0093 TH |
1488 | retval = sdp->changed ? DISK_EVENT_MEDIA_CHANGE : 0; |
1489 | sdp->changed = 0; | |
eb72d0bb | 1490 | scsi_disk_put(sdkp); |
1da177e4 | 1491 | return retval; |
1da177e4 LT |
1492 | } |
1493 | ||
e73aec82 | 1494 | static int sd_sync_cache(struct scsi_disk *sdkp) |
1da177e4 | 1495 | { |
1da177e4 | 1496 | int retries, res; |
e73aec82 | 1497 | struct scsi_device *sdp = sdkp->device; |
7e660100 JB |
1498 | const int timeout = sdp->request_queue->rq_timeout |
1499 | * SD_FLUSH_TIMEOUT_MULTIPLIER; | |
ea73a9f2 | 1500 | struct scsi_sense_hdr sshdr; |
1da177e4 LT |
1501 | |
1502 | if (!scsi_device_online(sdp)) | |
1503 | return -ENODEV; | |
1504 | ||
1da177e4 LT |
1505 | for (retries = 3; retries > 0; --retries) { |
1506 | unsigned char cmd[10] = { 0 }; | |
1507 | ||
1508 | cmd[0] = SYNCHRONIZE_CACHE; | |
1509 | /* | |
1510 | * Leave the rest of the command zero to indicate | |
1511 | * flush everything. | |
1512 | */ | |
fcbfffe2 CH |
1513 | res = scsi_execute(sdp, cmd, DMA_NONE, NULL, 0, NULL, &sshdr, |
1514 | timeout, SD_MAX_RETRIES, 0, RQF_PM, NULL); | |
ea73a9f2 | 1515 | if (res == 0) |
1da177e4 LT |
1516 | break; |
1517 | } | |
1518 | ||
e73aec82 | 1519 | if (res) { |
ef61329d | 1520 | sd_print_result(sdkp, "Synchronize Cache(10) failed", res); |
95897910 | 1521 | |
e73aec82 MP |
1522 | if (driver_byte(res) & DRIVER_SENSE) |
1523 | sd_print_sense_hdr(sdkp, &sshdr); | |
95897910 ON |
1524 | /* we need to evaluate the error return */ |
1525 | if (scsi_sense_valid(&sshdr) && | |
7aae5134 AS |
1526 | (sshdr.asc == 0x3a || /* medium not present */ |
1527 | sshdr.asc == 0x20)) /* invalid command */ | |
95897910 ON |
1528 | /* this is no error here */ |
1529 | return 0; | |
1530 | ||
1531 | switch (host_byte(res)) { | |
1532 | /* ignore errors due to racing a disconnection */ | |
1533 | case DID_BAD_TARGET: | |
1534 | case DID_NO_CONNECT: | |
1535 | return 0; | |
1536 | /* signal the upper layer it might try again */ | |
1537 | case DID_BUS_BUSY: | |
1538 | case DID_IMM_RETRY: | |
1539 | case DID_REQUEUE: | |
1540 | case DID_SOFT_ERROR: | |
1541 | return -EBUSY; | |
1542 | default: | |
1543 | return -EIO; | |
1544 | } | |
1da177e4 | 1545 | } |
3721050a | 1546 | return 0; |
1da177e4 LT |
1547 | } |
1548 | ||
1da177e4 LT |
1549 | static void sd_rescan(struct device *dev) |
1550 | { | |
3d9a1f53 | 1551 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
39b7f1e2 | 1552 | |
3d9a1f53 | 1553 | revalidate_disk(sdkp->disk); |
1da177e4 LT |
1554 | } |
1555 | ||
1556 | ||
1557 | #ifdef CONFIG_COMPAT | |
1558 | /* | |
1559 | * This gets directly called from VFS. When the ioctl | |
1560 | * is not recognized we go back to the other translation paths. | |
1561 | */ | |
0338e291 AV |
1562 | static int sd_compat_ioctl(struct block_device *bdev, fmode_t mode, |
1563 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1564 | { |
0338e291 | 1565 | struct scsi_device *sdev = scsi_disk(bdev->bd_disk)->device; |
21a9d4c9 | 1566 | int error; |
1da177e4 | 1567 | |
21a9d4c9 CH |
1568 | error = scsi_ioctl_block_when_processing_errors(sdev, cmd, |
1569 | (mode & FMODE_NDELAY) != 0); | |
1570 | if (error) | |
1571 | return error; | |
1da177e4 | 1572 | |
1da177e4 LT |
1573 | /* |
1574 | * Let the static ioctl translation table take care of it. | |
1575 | */ | |
21a9d4c9 CH |
1576 | if (!sdev->host->hostt->compat_ioctl) |
1577 | return -ENOIOCTLCMD; | |
1578 | return sdev->host->hostt->compat_ioctl(sdev, cmd, (void __user *)arg); | |
1da177e4 LT |
1579 | } |
1580 | #endif | |
1581 | ||
924d55b0 CH |
1582 | static char sd_pr_type(enum pr_type type) |
1583 | { | |
1584 | switch (type) { | |
1585 | case PR_WRITE_EXCLUSIVE: | |
1586 | return 0x01; | |
1587 | case PR_EXCLUSIVE_ACCESS: | |
1588 | return 0x03; | |
1589 | case PR_WRITE_EXCLUSIVE_REG_ONLY: | |
1590 | return 0x05; | |
1591 | case PR_EXCLUSIVE_ACCESS_REG_ONLY: | |
1592 | return 0x06; | |
1593 | case PR_WRITE_EXCLUSIVE_ALL_REGS: | |
1594 | return 0x07; | |
1595 | case PR_EXCLUSIVE_ACCESS_ALL_REGS: | |
1596 | return 0x08; | |
1597 | default: | |
1598 | return 0; | |
1599 | } | |
1600 | }; | |
1601 | ||
1602 | static int sd_pr_command(struct block_device *bdev, u8 sa, | |
1603 | u64 key, u64 sa_key, u8 type, u8 flags) | |
1604 | { | |
1605 | struct scsi_device *sdev = scsi_disk(bdev->bd_disk)->device; | |
1606 | struct scsi_sense_hdr sshdr; | |
1607 | int result; | |
1608 | u8 cmd[16] = { 0, }; | |
1609 | u8 data[24] = { 0, }; | |
1610 | ||
1611 | cmd[0] = PERSISTENT_RESERVE_OUT; | |
1612 | cmd[1] = sa; | |
1613 | cmd[2] = type; | |
1614 | put_unaligned_be32(sizeof(data), &cmd[5]); | |
1615 | ||
1616 | put_unaligned_be64(key, &data[0]); | |
1617 | put_unaligned_be64(sa_key, &data[8]); | |
1618 | data[20] = flags; | |
1619 | ||
1620 | result = scsi_execute_req(sdev, cmd, DMA_TO_DEVICE, &data, sizeof(data), | |
1621 | &sshdr, SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
1622 | ||
1623 | if ((driver_byte(result) & DRIVER_SENSE) && | |
1624 | (scsi_sense_valid(&sshdr))) { | |
1625 | sdev_printk(KERN_INFO, sdev, "PR command failed: %d\n", result); | |
1626 | scsi_print_sense_hdr(sdev, NULL, &sshdr); | |
1627 | } | |
1628 | ||
1629 | return result; | |
1630 | } | |
1631 | ||
1632 | static int sd_pr_register(struct block_device *bdev, u64 old_key, u64 new_key, | |
1633 | u32 flags) | |
1634 | { | |
1635 | if (flags & ~PR_FL_IGNORE_KEY) | |
1636 | return -EOPNOTSUPP; | |
1637 | return sd_pr_command(bdev, (flags & PR_FL_IGNORE_KEY) ? 0x06 : 0x00, | |
1638 | old_key, new_key, 0, | |
01f90dd9 | 1639 | (1 << 0) /* APTPL */); |
924d55b0 CH |
1640 | } |
1641 | ||
1642 | static int sd_pr_reserve(struct block_device *bdev, u64 key, enum pr_type type, | |
1643 | u32 flags) | |
1644 | { | |
1645 | if (flags) | |
1646 | return -EOPNOTSUPP; | |
1647 | return sd_pr_command(bdev, 0x01, key, 0, sd_pr_type(type), 0); | |
1648 | } | |
1649 | ||
1650 | static int sd_pr_release(struct block_device *bdev, u64 key, enum pr_type type) | |
1651 | { | |
1652 | return sd_pr_command(bdev, 0x02, key, 0, sd_pr_type(type), 0); | |
1653 | } | |
1654 | ||
1655 | static int sd_pr_preempt(struct block_device *bdev, u64 old_key, u64 new_key, | |
1656 | enum pr_type type, bool abort) | |
1657 | { | |
1658 | return sd_pr_command(bdev, abort ? 0x05 : 0x04, old_key, new_key, | |
1659 | sd_pr_type(type), 0); | |
1660 | } | |
1661 | ||
1662 | static int sd_pr_clear(struct block_device *bdev, u64 key) | |
1663 | { | |
1664 | return sd_pr_command(bdev, 0x03, key, 0, 0, 0); | |
1665 | } | |
1666 | ||
1667 | static const struct pr_ops sd_pr_ops = { | |
1668 | .pr_register = sd_pr_register, | |
1669 | .pr_reserve = sd_pr_reserve, | |
1670 | .pr_release = sd_pr_release, | |
1671 | .pr_preempt = sd_pr_preempt, | |
1672 | .pr_clear = sd_pr_clear, | |
1673 | }; | |
1674 | ||
83d5cde4 | 1675 | static const struct block_device_operations sd_fops = { |
1da177e4 | 1676 | .owner = THIS_MODULE, |
0338e291 AV |
1677 | .open = sd_open, |
1678 | .release = sd_release, | |
8a6cfeb6 | 1679 | .ioctl = sd_ioctl, |
a885c8c4 | 1680 | .getgeo = sd_getgeo, |
1da177e4 | 1681 | #ifdef CONFIG_COMPAT |
0338e291 | 1682 | .compat_ioctl = sd_compat_ioctl, |
1da177e4 | 1683 | #endif |
2bae0093 | 1684 | .check_events = sd_check_events, |
1da177e4 | 1685 | .revalidate_disk = sd_revalidate_disk, |
72ec24bd | 1686 | .unlock_native_capacity = sd_unlock_native_capacity, |
924d55b0 | 1687 | .pr_ops = &sd_pr_ops, |
1da177e4 LT |
1688 | }; |
1689 | ||
7a38dc0b HR |
1690 | /** |
1691 | * sd_eh_reset - reset error handling callback | |
1692 | * @scmd: sd-issued command that has failed | |
1693 | * | |
1694 | * This function is called by the SCSI midlayer before starting | |
1695 | * SCSI EH. When counting medium access failures we have to be | |
1696 | * careful to register it only only once per device and SCSI EH run; | |
1697 | * there might be several timed out commands which will cause the | |
1698 | * 'max_medium_access_timeouts' counter to trigger after the first | |
1699 | * SCSI EH run already and set the device to offline. | |
1700 | * So this function resets the internal counter before starting SCSI EH. | |
1701 | **/ | |
1702 | static void sd_eh_reset(struct scsi_cmnd *scmd) | |
1703 | { | |
1704 | struct scsi_disk *sdkp = scsi_disk(scmd->request->rq_disk); | |
1705 | ||
1706 | /* New SCSI EH run, reset gate variable */ | |
1707 | sdkp->ignore_medium_access_errors = false; | |
1708 | } | |
1709 | ||
18a4d0a2 MP |
1710 | /** |
1711 | * sd_eh_action - error handling callback | |
1712 | * @scmd: sd-issued command that has failed | |
18a4d0a2 MP |
1713 | * @eh_disp: The recovery disposition suggested by the midlayer |
1714 | * | |
2451079b JB |
1715 | * This function is called by the SCSI midlayer upon completion of an |
1716 | * error test command (currently TEST UNIT READY). The result of sending | |
1717 | * the eh command is passed in eh_disp. We're looking for devices that | |
1718 | * fail medium access commands but are OK with non access commands like | |
1719 | * test unit ready (so wrongly see the device as having a successful | |
1720 | * recovery) | |
18a4d0a2 | 1721 | **/ |
2451079b | 1722 | static int sd_eh_action(struct scsi_cmnd *scmd, int eh_disp) |
18a4d0a2 MP |
1723 | { |
1724 | struct scsi_disk *sdkp = scsi_disk(scmd->request->rq_disk); | |
1725 | ||
1726 | if (!scsi_device_online(scmd->device) || | |
2451079b JB |
1727 | !scsi_medium_access_command(scmd) || |
1728 | host_byte(scmd->result) != DID_TIME_OUT || | |
1729 | eh_disp != SUCCESS) | |
18a4d0a2 MP |
1730 | return eh_disp; |
1731 | ||
1732 | /* | |
1733 | * The device has timed out executing a medium access command. | |
1734 | * However, the TEST UNIT READY command sent during error | |
1735 | * handling completed successfully. Either the device is in the | |
1736 | * process of recovering or has it suffered an internal failure | |
1737 | * that prevents access to the storage medium. | |
1738 | */ | |
7a38dc0b HR |
1739 | if (!sdkp->ignore_medium_access_errors) { |
1740 | sdkp->medium_access_timed_out++; | |
1741 | sdkp->ignore_medium_access_errors = true; | |
1742 | } | |
18a4d0a2 MP |
1743 | |
1744 | /* | |
1745 | * If the device keeps failing read/write commands but TEST UNIT | |
1746 | * READY always completes successfully we assume that medium | |
1747 | * access is no longer possible and take the device offline. | |
1748 | */ | |
1749 | if (sdkp->medium_access_timed_out >= sdkp->max_medium_access_timeouts) { | |
1750 | scmd_printk(KERN_ERR, scmd, | |
1751 | "Medium access timeout failure. Offlining disk!\n"); | |
1752 | scsi_device_set_state(scmd->device, SDEV_OFFLINE); | |
1753 | ||
e8f8d50e | 1754 | return SUCCESS; |
18a4d0a2 MP |
1755 | } |
1756 | ||
1757 | return eh_disp; | |
1758 | } | |
1759 | ||
af55ff67 MP |
1760 | static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd) |
1761 | { | |
83096ebf TH |
1762 | u64 start_lba = blk_rq_pos(scmd->request); |
1763 | u64 end_lba = blk_rq_pos(scmd->request) + (scsi_bufflen(scmd) / 512); | |
74856fbf | 1764 | u64 factor = scmd->device->sector_size / 512; |
af55ff67 MP |
1765 | u64 bad_lba; |
1766 | int info_valid; | |
a8733c7b JB |
1767 | /* |
1768 | * resid is optional but mostly filled in. When it's unused, | |
1769 | * its value is zero, so we assume the whole buffer transferred | |
1770 | */ | |
1771 | unsigned int transferred = scsi_bufflen(scmd) - scsi_get_resid(scmd); | |
1772 | unsigned int good_bytes; | |
af55ff67 | 1773 | |
af55ff67 MP |
1774 | info_valid = scsi_get_sense_info_fld(scmd->sense_buffer, |
1775 | SCSI_SENSE_BUFFERSIZE, | |
1776 | &bad_lba); | |
1777 | if (!info_valid) | |
1778 | return 0; | |
1779 | ||
1780 | if (scsi_bufflen(scmd) <= scmd->device->sector_size) | |
1781 | return 0; | |
1782 | ||
74856fbf MH |
1783 | /* be careful ... don't want any overflows */ |
1784 | do_div(start_lba, factor); | |
1785 | do_div(end_lba, factor); | |
af55ff67 MP |
1786 | |
1787 | /* The bad lba was reported incorrectly, we have no idea where | |
1788 | * the error is. | |
1789 | */ | |
1790 | if (bad_lba < start_lba || bad_lba >= end_lba) | |
1791 | return 0; | |
1792 | ||
1793 | /* This computation should always be done in terms of | |
1794 | * the resolution of the device's medium. | |
1795 | */ | |
a8733c7b JB |
1796 | good_bytes = (bad_lba - start_lba) * scmd->device->sector_size; |
1797 | return min(good_bytes, transferred); | |
af55ff67 MP |
1798 | } |
1799 | ||
1da177e4 | 1800 | /** |
7b3d9545 | 1801 | * sd_done - bottom half handler: called when the lower level |
1da177e4 LT |
1802 | * driver has completed (successfully or otherwise) a scsi command. |
1803 | * @SCpnt: mid-level's per command structure. | |
1804 | * | |
1805 | * Note: potentially run from within an ISR. Must not block. | |
1806 | **/ | |
7b3d9545 | 1807 | static int sd_done(struct scsi_cmnd *SCpnt) |
1da177e4 LT |
1808 | { |
1809 | int result = SCpnt->result; | |
af55ff67 | 1810 | unsigned int good_bytes = result ? 0 : scsi_bufflen(SCpnt); |
1da177e4 | 1811 | struct scsi_sense_hdr sshdr; |
4e7392ec | 1812 | struct scsi_disk *sdkp = scsi_disk(SCpnt->request->rq_disk); |
26e85fcd | 1813 | struct request *req = SCpnt->request; |
1da177e4 LT |
1814 | int sense_valid = 0; |
1815 | int sense_deferred = 0; | |
c98a0eb0 | 1816 | unsigned char op = SCpnt->cmnd[0]; |
5db44863 | 1817 | unsigned char unmap = SCpnt->cmnd[1] & 8; |
1da177e4 | 1818 | |
89d94756 HR |
1819 | switch (req_op(req)) { |
1820 | case REQ_OP_DISCARD: | |
1821 | case REQ_OP_WRITE_SAME: | |
1822 | case REQ_OP_ZONE_RESET: | |
26e85fcd MP |
1823 | if (!result) { |
1824 | good_bytes = blk_rq_bytes(req); | |
1825 | scsi_set_resid(SCpnt, 0); | |
1826 | } else { | |
1827 | good_bytes = 0; | |
1828 | scsi_set_resid(SCpnt, blk_rq_bytes(req)); | |
1829 | } | |
89d94756 HR |
1830 | break; |
1831 | case REQ_OP_ZONE_REPORT: | |
1832 | if (!result) { | |
1833 | good_bytes = scsi_bufflen(SCpnt) | |
1834 | - scsi_get_resid(SCpnt); | |
1835 | scsi_set_resid(SCpnt, 0); | |
1836 | } else { | |
1837 | good_bytes = 0; | |
1838 | scsi_set_resid(SCpnt, blk_rq_bytes(req)); | |
1839 | } | |
1840 | break; | |
26e85fcd | 1841 | } |
6a32a8ae | 1842 | |
1da177e4 LT |
1843 | if (result) { |
1844 | sense_valid = scsi_command_normalize_sense(SCpnt, &sshdr); | |
1845 | if (sense_valid) | |
1846 | sense_deferred = scsi_sense_is_deferred(&sshdr); | |
1847 | } | |
2a863ba8 DJ |
1848 | sdkp->medium_access_timed_out = 0; |
1849 | ||
03aba2f7 LT |
1850 | if (driver_byte(result) != DRIVER_SENSE && |
1851 | (!sense_valid || sense_deferred)) | |
1852 | goto out; | |
1853 | ||
1854 | switch (sshdr.sense_key) { | |
1855 | case HARDWARE_ERROR: | |
1856 | case MEDIUM_ERROR: | |
af55ff67 | 1857 | good_bytes = sd_completed_bytes(SCpnt); |
03aba2f7 LT |
1858 | break; |
1859 | case RECOVERED_ERROR: | |
af55ff67 MP |
1860 | good_bytes = scsi_bufflen(SCpnt); |
1861 | break; | |
10dab226 JW |
1862 | case NO_SENSE: |
1863 | /* This indicates a false check condition, so ignore it. An | |
1864 | * unknown amount of data was transferred so treat it as an | |
1865 | * error. | |
1866 | */ | |
10dab226 JW |
1867 | SCpnt->result = 0; |
1868 | memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); | |
1869 | break; | |
c98a0eb0 MP |
1870 | case ABORTED_COMMAND: |
1871 | if (sshdr.asc == 0x10) /* DIF: Target detected corruption */ | |
1872 | good_bytes = sd_completed_bytes(SCpnt); | |
1873 | break; | |
1874 | case ILLEGAL_REQUEST: | |
1875 | if (sshdr.asc == 0x10) /* DIX: Host detected corruption */ | |
af55ff67 | 1876 | good_bytes = sd_completed_bytes(SCpnt); |
c98a0eb0 | 1877 | /* INVALID COMMAND OPCODE or INVALID FIELD IN CDB */ |
5db44863 MP |
1878 | if (sshdr.asc == 0x20 || sshdr.asc == 0x24) { |
1879 | switch (op) { | |
1880 | case UNMAP: | |
1881 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
1882 | break; | |
1883 | case WRITE_SAME_16: | |
1884 | case WRITE_SAME: | |
1885 | if (unmap) | |
1886 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
1887 | else { | |
1888 | sdkp->device->no_write_same = 1; | |
1889 | sd_config_write_same(sdkp); | |
1890 | ||
1891 | good_bytes = 0; | |
1892 | req->__data_len = blk_rq_bytes(req); | |
e8064021 | 1893 | req->rq_flags |= RQF_QUIET; |
5db44863 MP |
1894 | } |
1895 | } | |
1896 | } | |
03aba2f7 LT |
1897 | break; |
1898 | default: | |
1899 | break; | |
1da177e4 | 1900 | } |
89d94756 | 1901 | |
03aba2f7 | 1902 | out: |
89d94756 HR |
1903 | if (sd_is_zoned(sdkp)) |
1904 | sd_zbc_complete(SCpnt, good_bytes, &sshdr); | |
1905 | ||
ef61329d HR |
1906 | SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO, SCpnt, |
1907 | "sd_done: completed %d of %d bytes\n", | |
1908 | good_bytes, scsi_bufflen(SCpnt))); | |
1909 | ||
af55ff67 MP |
1910 | if (rq_data_dir(SCpnt->request) == READ && scsi_prot_sg_count(SCpnt)) |
1911 | sd_dif_complete(SCpnt, good_bytes); | |
1912 | ||
7b3d9545 | 1913 | return good_bytes; |
1da177e4 LT |
1914 | } |
1915 | ||
1da177e4 LT |
1916 | /* |
1917 | * spinup disk - called only in sd_revalidate_disk() | |
1918 | */ | |
1919 | static void | |
e73aec82 | 1920 | sd_spinup_disk(struct scsi_disk *sdkp) |
ea73a9f2 | 1921 | { |
1da177e4 | 1922 | unsigned char cmd[10]; |
4451e472 | 1923 | unsigned long spintime_expire = 0; |
1da177e4 LT |
1924 | int retries, spintime; |
1925 | unsigned int the_result; | |
1926 | struct scsi_sense_hdr sshdr; | |
1927 | int sense_valid = 0; | |
1928 | ||
1929 | spintime = 0; | |
1930 | ||
1931 | /* Spin up drives, as required. Only do this at boot time */ | |
1932 | /* Spinup needs to be done for module loads too. */ | |
1933 | do { | |
1934 | retries = 0; | |
1935 | ||
1936 | do { | |
1937 | cmd[0] = TEST_UNIT_READY; | |
1938 | memset((void *) &cmd[1], 0, 9); | |
1939 | ||
ea73a9f2 JB |
1940 | the_result = scsi_execute_req(sdkp->device, cmd, |
1941 | DMA_NONE, NULL, 0, | |
1942 | &sshdr, SD_TIMEOUT, | |
f4f4e47e | 1943 | SD_MAX_RETRIES, NULL); |
1da177e4 | 1944 | |
b4d38e38 AS |
1945 | /* |
1946 | * If the drive has indicated to us that it | |
1947 | * doesn't have any media in it, don't bother | |
1948 | * with any more polling. | |
1949 | */ | |
1950 | if (media_not_present(sdkp, &sshdr)) | |
1951 | return; | |
1952 | ||
1da177e4 | 1953 | if (the_result) |
ea73a9f2 | 1954 | sense_valid = scsi_sense_valid(&sshdr); |
1da177e4 LT |
1955 | retries++; |
1956 | } while (retries < 3 && | |
1957 | (!scsi_status_is_good(the_result) || | |
1958 | ((driver_byte(the_result) & DRIVER_SENSE) && | |
1959 | sense_valid && sshdr.sense_key == UNIT_ATTENTION))); | |
1960 | ||
1da177e4 LT |
1961 | if ((driver_byte(the_result) & DRIVER_SENSE) == 0) { |
1962 | /* no sense, TUR either succeeded or failed | |
1963 | * with a status error */ | |
e73aec82 | 1964 | if(!spintime && !scsi_status_is_good(the_result)) { |
ef61329d HR |
1965 | sd_print_result(sdkp, "Test Unit Ready failed", |
1966 | the_result); | |
e73aec82 | 1967 | } |
1da177e4 LT |
1968 | break; |
1969 | } | |
ef61329d | 1970 | |
1da177e4 LT |
1971 | /* |
1972 | * The device does not want the automatic start to be issued. | |
1973 | */ | |
33dd6f92 | 1974 | if (sdkp->device->no_start_on_add) |
1da177e4 | 1975 | break; |
1da177e4 | 1976 | |
33dd6f92 MW |
1977 | if (sense_valid && sshdr.sense_key == NOT_READY) { |
1978 | if (sshdr.asc == 4 && sshdr.ascq == 3) | |
1979 | break; /* manual intervention required */ | |
1980 | if (sshdr.asc == 4 && sshdr.ascq == 0xb) | |
1981 | break; /* standby */ | |
1982 | if (sshdr.asc == 4 && sshdr.ascq == 0xc) | |
1983 | break; /* unavailable */ | |
1984 | /* | |
1985 | * Issue command to spin up drive when not ready | |
1986 | */ | |
1da177e4 | 1987 | if (!spintime) { |
e73aec82 | 1988 | sd_printk(KERN_NOTICE, sdkp, "Spinning up disk..."); |
1da177e4 LT |
1989 | cmd[0] = START_STOP; |
1990 | cmd[1] = 1; /* Return immediately */ | |
1991 | memset((void *) &cmd[2], 0, 8); | |
1992 | cmd[4] = 1; /* Start spin cycle */ | |
d2886ea3 SR |
1993 | if (sdkp->device->start_stop_pwr_cond) |
1994 | cmd[4] |= 1 << 4; | |
ea73a9f2 JB |
1995 | scsi_execute_req(sdkp->device, cmd, DMA_NONE, |
1996 | NULL, 0, &sshdr, | |
f4f4e47e FT |
1997 | SD_TIMEOUT, SD_MAX_RETRIES, |
1998 | NULL); | |
4451e472 AS |
1999 | spintime_expire = jiffies + 100 * HZ; |
2000 | spintime = 1; | |
1da177e4 | 2001 | } |
1da177e4 LT |
2002 | /* Wait 1 second for next try */ |
2003 | msleep(1000); | |
2004 | printk("."); | |
4451e472 AS |
2005 | |
2006 | /* | |
2007 | * Wait for USB flash devices with slow firmware. | |
2008 | * Yes, this sense key/ASC combination shouldn't | |
2009 | * occur here. It's characteristic of these devices. | |
2010 | */ | |
2011 | } else if (sense_valid && | |
2012 | sshdr.sense_key == UNIT_ATTENTION && | |
2013 | sshdr.asc == 0x28) { | |
2014 | if (!spintime) { | |
2015 | spintime_expire = jiffies + 5 * HZ; | |
2016 | spintime = 1; | |
2017 | } | |
2018 | /* Wait 1 second for next try */ | |
2019 | msleep(1000); | |
1da177e4 LT |
2020 | } else { |
2021 | /* we don't understand the sense code, so it's | |
2022 | * probably pointless to loop */ | |
2023 | if(!spintime) { | |
e73aec82 MP |
2024 | sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n"); |
2025 | sd_print_sense_hdr(sdkp, &sshdr); | |
1da177e4 LT |
2026 | } |
2027 | break; | |
2028 | } | |
2029 | ||
4451e472 | 2030 | } while (spintime && time_before_eq(jiffies, spintime_expire)); |
1da177e4 LT |
2031 | |
2032 | if (spintime) { | |
2033 | if (scsi_status_is_good(the_result)) | |
2034 | printk("ready\n"); | |
2035 | else | |
2036 | printk("not responding...\n"); | |
2037 | } | |
2038 | } | |
2039 | ||
e0597d70 MP |
2040 | /* |
2041 | * Determine whether disk supports Data Integrity Field. | |
2042 | */ | |
fe542396 | 2043 | static int sd_read_protection_type(struct scsi_disk *sdkp, unsigned char *buffer) |
e0597d70 MP |
2044 | { |
2045 | struct scsi_device *sdp = sdkp->device; | |
2046 | u8 type; | |
fe542396 | 2047 | int ret = 0; |
e0597d70 MP |
2048 | |
2049 | if (scsi_device_protection(sdp) == 0 || (buffer[12] & 1) == 0) | |
fe542396 | 2050 | return ret; |
35e1a5d9 MP |
2051 | |
2052 | type = ((buffer[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */ | |
2053 | ||
8475c811 | 2054 | if (type > T10_PI_TYPE3_PROTECTION) |
fe542396 MP |
2055 | ret = -ENODEV; |
2056 | else if (scsi_host_dif_capable(sdp->host, type)) | |
2057 | ret = 1; | |
2058 | ||
2059 | if (sdkp->first_scan || type != sdkp->protection_type) | |
2060 | switch (ret) { | |
2061 | case -ENODEV: | |
2062 | sd_printk(KERN_ERR, sdkp, "formatted with unsupported" \ | |
2063 | " protection type %u. Disabling disk!\n", | |
2064 | type); | |
2065 | break; | |
2066 | case 1: | |
2067 | sd_printk(KERN_NOTICE, sdkp, | |
2068 | "Enabling DIF Type %u protection\n", type); | |
2069 | break; | |
2070 | case 0: | |
2071 | sd_printk(KERN_NOTICE, sdkp, | |
2072 | "Disabling DIF Type %u protection\n", type); | |
2073 | break; | |
2074 | } | |
e0597d70 | 2075 | |
be922f47 MP |
2076 | sdkp->protection_type = type; |
2077 | ||
fe542396 | 2078 | return ret; |
e0597d70 MP |
2079 | } |
2080 | ||
0da205e0 MW |
2081 | static void read_capacity_error(struct scsi_disk *sdkp, struct scsi_device *sdp, |
2082 | struct scsi_sense_hdr *sshdr, int sense_valid, | |
2083 | int the_result) | |
2084 | { | |
0da205e0 MW |
2085 | if (driver_byte(the_result) & DRIVER_SENSE) |
2086 | sd_print_sense_hdr(sdkp, sshdr); | |
2087 | else | |
2088 | sd_printk(KERN_NOTICE, sdkp, "Sense not available.\n"); | |
2089 | ||
2090 | /* | |
2091 | * Set dirty bit for removable devices if not ready - | |
2092 | * sometimes drives will not report this properly. | |
2093 | */ | |
2094 | if (sdp->removable && | |
2095 | sense_valid && sshdr->sense_key == NOT_READY) | |
2bae0093 | 2096 | set_media_not_present(sdkp); |
0da205e0 MW |
2097 | |
2098 | /* | |
2099 | * We used to set media_present to 0 here to indicate no media | |
2100 | * in the drive, but some drives fail read capacity even with | |
2101 | * media present, so we can't do that. | |
2102 | */ | |
2103 | sdkp->capacity = 0; /* unknown mapped to zero - as usual */ | |
2104 | } | |
2105 | ||
2106 | #define RC16_LEN 32 | |
2107 | #if RC16_LEN > SD_BUF_SIZE | |
2108 | #error RC16_LEN must not be more than SD_BUF_SIZE | |
2109 | #endif | |
2110 | ||
3233ac19 JB |
2111 | #define READ_CAPACITY_RETRIES_ON_RESET 10 |
2112 | ||
0da205e0 MW |
2113 | static int read_capacity_16(struct scsi_disk *sdkp, struct scsi_device *sdp, |
2114 | unsigned char *buffer) | |
ea73a9f2 | 2115 | { |
1da177e4 | 2116 | unsigned char cmd[16]; |
1da177e4 LT |
2117 | struct scsi_sense_hdr sshdr; |
2118 | int sense_valid = 0; | |
0da205e0 | 2119 | int the_result; |
3233ac19 | 2120 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
ea09bcc9 | 2121 | unsigned int alignment; |
0da205e0 MW |
2122 | unsigned long long lba; |
2123 | unsigned sector_size; | |
1da177e4 | 2124 | |
5ce524bd HG |
2125 | if (sdp->no_read_capacity_16) |
2126 | return -EINVAL; | |
2127 | ||
1da177e4 | 2128 | do { |
0da205e0 | 2129 | memset(cmd, 0, 16); |
eb846d9f | 2130 | cmd[0] = SERVICE_ACTION_IN_16; |
0da205e0 MW |
2131 | cmd[1] = SAI_READ_CAPACITY_16; |
2132 | cmd[13] = RC16_LEN; | |
2133 | memset(buffer, 0, RC16_LEN); | |
2134 | ||
ea73a9f2 | 2135 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, |
0da205e0 MW |
2136 | buffer, RC16_LEN, &sshdr, |
2137 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
1da177e4 | 2138 | |
ea73a9f2 | 2139 | if (media_not_present(sdkp, &sshdr)) |
0da205e0 | 2140 | return -ENODEV; |
1da177e4 | 2141 | |
2b301307 | 2142 | if (the_result) { |
ea73a9f2 | 2143 | sense_valid = scsi_sense_valid(&sshdr); |
2b301307 MW |
2144 | if (sense_valid && |
2145 | sshdr.sense_key == ILLEGAL_REQUEST && | |
2146 | (sshdr.asc == 0x20 || sshdr.asc == 0x24) && | |
2147 | sshdr.ascq == 0x00) | |
2148 | /* Invalid Command Operation Code or | |
2149 | * Invalid Field in CDB, just retry | |
2150 | * silently with RC10 */ | |
2151 | return -EINVAL; | |
3233ac19 JB |
2152 | if (sense_valid && |
2153 | sshdr.sense_key == UNIT_ATTENTION && | |
2154 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) | |
2155 | /* Device reset might occur several times, | |
2156 | * give it one more chance */ | |
2157 | if (--reset_retries > 0) | |
2158 | continue; | |
2b301307 | 2159 | } |
1da177e4 LT |
2160 | retries--; |
2161 | ||
2162 | } while (the_result && retries); | |
2163 | ||
0da205e0 | 2164 | if (the_result) { |
ef61329d | 2165 | sd_print_result(sdkp, "Read Capacity(16) failed", the_result); |
0da205e0 MW |
2166 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); |
2167 | return -EINVAL; | |
2168 | } | |
e73aec82 | 2169 | |
8f76d151 DH |
2170 | sector_size = get_unaligned_be32(&buffer[8]); |
2171 | lba = get_unaligned_be64(&buffer[0]); | |
0da205e0 | 2172 | |
fe542396 MP |
2173 | if (sd_read_protection_type(sdkp, buffer) < 0) { |
2174 | sdkp->capacity = 0; | |
2175 | return -ENODEV; | |
2176 | } | |
0da205e0 MW |
2177 | |
2178 | if ((sizeof(sdkp->capacity) == 4) && (lba >= 0xffffffffULL)) { | |
2179 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a " | |
2180 | "kernel compiled with support for large block " | |
2181 | "devices.\n"); | |
2182 | sdkp->capacity = 0; | |
2183 | return -EOVERFLOW; | |
2184 | } | |
2185 | ||
ea09bcc9 | 2186 | /* Logical blocks per physical block exponent */ |
526f7c79 | 2187 | sdkp->physical_block_size = (1 << (buffer[13] & 0xf)) * sector_size; |
ea09bcc9 | 2188 | |
89d94756 HR |
2189 | /* RC basis */ |
2190 | sdkp->rc_basis = (buffer[12] >> 4) & 0x3; | |
2191 | ||
ea09bcc9 MP |
2192 | /* Lowest aligned logical block */ |
2193 | alignment = ((buffer[14] & 0x3f) << 8 | buffer[15]) * sector_size; | |
2194 | blk_queue_alignment_offset(sdp->request_queue, alignment); | |
2195 | if (alignment && sdkp->first_scan) | |
2196 | sd_printk(KERN_NOTICE, sdkp, | |
2197 | "physical block alignment offset: %u\n", alignment); | |
2198 | ||
c98a0eb0 MP |
2199 | if (buffer[14] & 0x80) { /* LBPME */ |
2200 | sdkp->lbpme = 1; | |
e339c1a7 | 2201 | |
c98a0eb0 MP |
2202 | if (buffer[14] & 0x40) /* LBPRZ */ |
2203 | sdkp->lbprz = 1; | |
e339c1a7 | 2204 | |
c98a0eb0 | 2205 | sd_config_discard(sdkp, SD_LBP_WS16); |
e339c1a7 MP |
2206 | } |
2207 | ||
0da205e0 MW |
2208 | sdkp->capacity = lba + 1; |
2209 | return sector_size; | |
2210 | } | |
2211 | ||
2212 | static int read_capacity_10(struct scsi_disk *sdkp, struct scsi_device *sdp, | |
2213 | unsigned char *buffer) | |
2214 | { | |
2215 | unsigned char cmd[16]; | |
2216 | struct scsi_sense_hdr sshdr; | |
2217 | int sense_valid = 0; | |
2218 | int the_result; | |
3233ac19 | 2219 | int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET; |
0da205e0 MW |
2220 | sector_t lba; |
2221 | unsigned sector_size; | |
2222 | ||
2223 | do { | |
2224 | cmd[0] = READ_CAPACITY; | |
2225 | memset(&cmd[1], 0, 9); | |
2226 | memset(buffer, 0, 8); | |
2227 | ||
2228 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, | |
2229 | buffer, 8, &sshdr, | |
2230 | SD_TIMEOUT, SD_MAX_RETRIES, NULL); | |
2231 | ||
2232 | if (media_not_present(sdkp, &sshdr)) | |
2233 | return -ENODEV; | |
2234 | ||
3233ac19 | 2235 | if (the_result) { |
0da205e0 | 2236 | sense_valid = scsi_sense_valid(&sshdr); |
3233ac19 JB |
2237 | if (sense_valid && |
2238 | sshdr.sense_key == UNIT_ATTENTION && | |
2239 | sshdr.asc == 0x29 && sshdr.ascq == 0x00) | |
2240 | /* Device reset might occur several times, | |
2241 | * give it one more chance */ | |
2242 | if (--reset_retries > 0) | |
2243 | continue; | |
2244 | } | |
0da205e0 MW |
2245 | retries--; |
2246 | ||
2247 | } while (the_result && retries); | |
2248 | ||
2249 | if (the_result) { | |
ef61329d | 2250 | sd_print_result(sdkp, "Read Capacity(10) failed", the_result); |
0da205e0 MW |
2251 | read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result); |
2252 | return -EINVAL; | |
2253 | } | |
2254 | ||
8f76d151 DH |
2255 | sector_size = get_unaligned_be32(&buffer[4]); |
2256 | lba = get_unaligned_be32(&buffer[0]); | |
0da205e0 | 2257 | |
5ce524bd HG |
2258 | if (sdp->no_read_capacity_16 && (lba == 0xffffffff)) { |
2259 | /* Some buggy (usb cardreader) devices return an lba of | |
2260 | 0xffffffff when the want to report a size of 0 (with | |
2261 | which they really mean no media is present) */ | |
2262 | sdkp->capacity = 0; | |
5cc10350 | 2263 | sdkp->physical_block_size = sector_size; |
5ce524bd HG |
2264 | return sector_size; |
2265 | } | |
2266 | ||
0da205e0 MW |
2267 | if ((sizeof(sdkp->capacity) == 4) && (lba == 0xffffffff)) { |
2268 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a " | |
2269 | "kernel compiled with support for large block " | |
2270 | "devices.\n"); | |
2271 | sdkp->capacity = 0; | |
2272 | return -EOVERFLOW; | |
2273 | } | |
2274 | ||
2275 | sdkp->capacity = lba + 1; | |
526f7c79 | 2276 | sdkp->physical_block_size = sector_size; |
0da205e0 MW |
2277 | return sector_size; |
2278 | } | |
2279 | ||
2b301307 MW |
2280 | static int sd_try_rc16_first(struct scsi_device *sdp) |
2281 | { | |
f87146bb HR |
2282 | if (sdp->host->max_cmd_len < 16) |
2283 | return 0; | |
6a0bdffa AS |
2284 | if (sdp->try_rc_10_first) |
2285 | return 0; | |
2b301307 MW |
2286 | if (sdp->scsi_level > SCSI_SPC_2) |
2287 | return 1; | |
2288 | if (scsi_device_protection(sdp)) | |
2289 | return 1; | |
2290 | return 0; | |
2291 | } | |
2292 | ||
0da205e0 MW |
2293 | /* |
2294 | * read disk capacity | |
2295 | */ | |
2296 | static void | |
2297 | sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer) | |
2298 | { | |
2299 | int sector_size; | |
2300 | struct scsi_device *sdp = sdkp->device; | |
2301 | ||
2b301307 | 2302 | if (sd_try_rc16_first(sdp)) { |
0da205e0 MW |
2303 | sector_size = read_capacity_16(sdkp, sdp, buffer); |
2304 | if (sector_size == -EOVERFLOW) | |
1da177e4 | 2305 | goto got_data; |
2b301307 MW |
2306 | if (sector_size == -ENODEV) |
2307 | return; | |
2308 | if (sector_size < 0) | |
2309 | sector_size = read_capacity_10(sdkp, sdp, buffer); | |
0da205e0 MW |
2310 | if (sector_size < 0) |
2311 | return; | |
1da177e4 | 2312 | } else { |
0da205e0 MW |
2313 | sector_size = read_capacity_10(sdkp, sdp, buffer); |
2314 | if (sector_size == -EOVERFLOW) | |
2315 | goto got_data; | |
2316 | if (sector_size < 0) | |
2317 | return; | |
2318 | if ((sizeof(sdkp->capacity) > 4) && | |
2319 | (sdkp->capacity > 0xffffffffULL)) { | |
2320 | int old_sector_size = sector_size; | |
2321 | sd_printk(KERN_NOTICE, sdkp, "Very big device. " | |
2322 | "Trying to use READ CAPACITY(16).\n"); | |
2323 | sector_size = read_capacity_16(sdkp, sdp, buffer); | |
2324 | if (sector_size < 0) { | |
2325 | sd_printk(KERN_NOTICE, sdkp, | |
2326 | "Using 0xffffffff as device size\n"); | |
2327 | sdkp->capacity = 1 + (sector_t) 0xffffffff; | |
2328 | sector_size = old_sector_size; | |
2329 | goto got_data; | |
2330 | } | |
2331 | } | |
2332 | } | |
1da177e4 | 2333 | |
5c211caa AS |
2334 | /* Some devices are known to return the total number of blocks, |
2335 | * not the highest block number. Some devices have versions | |
2336 | * which do this and others which do not. Some devices we might | |
2337 | * suspect of doing this but we don't know for certain. | |
2338 | * | |
2339 | * If we know the reported capacity is wrong, decrement it. If | |
2340 | * we can only guess, then assume the number of blocks is even | |
2341 | * (usually true but not always) and err on the side of lowering | |
2342 | * the capacity. | |
2343 | */ | |
2344 | if (sdp->fix_capacity || | |
2345 | (sdp->guess_capacity && (sdkp->capacity & 0x01))) { | |
2346 | sd_printk(KERN_INFO, sdkp, "Adjusting the sector count " | |
2347 | "from its reported value: %llu\n", | |
2348 | (unsigned long long) sdkp->capacity); | |
1da177e4 | 2349 | --sdkp->capacity; |
61bf54b7 ON |
2350 | } |
2351 | ||
1da177e4 LT |
2352 | got_data: |
2353 | if (sector_size == 0) { | |
2354 | sector_size = 512; | |
e73aec82 MP |
2355 | sd_printk(KERN_NOTICE, sdkp, "Sector size 0 reported, " |
2356 | "assuming 512.\n"); | |
1da177e4 LT |
2357 | } |
2358 | ||
2359 | if (sector_size != 512 && | |
2360 | sector_size != 1024 && | |
2361 | sector_size != 2048 && | |
74856fbf | 2362 | sector_size != 4096) { |
e73aec82 MP |
2363 | sd_printk(KERN_NOTICE, sdkp, "Unsupported sector size %d.\n", |
2364 | sector_size); | |
1da177e4 LT |
2365 | /* |
2366 | * The user might want to re-format the drive with | |
2367 | * a supported sectorsize. Once this happens, it | |
2368 | * would be relatively trivial to set the thing up. | |
2369 | * For this reason, we leave the thing in the table. | |
2370 | */ | |
2371 | sdkp->capacity = 0; | |
2372 | /* | |
2373 | * set a bogus sector size so the normal read/write | |
2374 | * logic in the block layer will eventually refuse any | |
2375 | * request on this device without tripping over power | |
2376 | * of two sector size assumptions | |
2377 | */ | |
2378 | sector_size = 512; | |
2379 | } | |
e1defc4f | 2380 | blk_queue_logical_block_size(sdp->request_queue, sector_size); |
89d94756 HR |
2381 | blk_queue_physical_block_size(sdp->request_queue, |
2382 | sdkp->physical_block_size); | |
2383 | sdkp->device->sector_size = sector_size; | |
7404ad3b | 2384 | |
89d94756 HR |
2385 | if (sdkp->capacity > 0xffffffff) |
2386 | sdp->use_16_for_rw = 1; | |
1da177e4 | 2387 | |
89d94756 | 2388 | } |
1da177e4 | 2389 | |
89d94756 HR |
2390 | /* |
2391 | * Print disk capacity | |
2392 | */ | |
2393 | static void | |
2394 | sd_print_capacity(struct scsi_disk *sdkp, | |
2395 | sector_t old_capacity) | |
2396 | { | |
2397 | int sector_size = sdkp->device->sector_size; | |
2398 | char cap_str_2[10], cap_str_10[10]; | |
ea09bcc9 | 2399 | |
89d94756 HR |
2400 | string_get_size(sdkp->capacity, sector_size, |
2401 | STRING_UNITS_2, cap_str_2, sizeof(cap_str_2)); | |
2402 | string_get_size(sdkp->capacity, sector_size, | |
2403 | STRING_UNITS_10, cap_str_10, | |
2404 | sizeof(cap_str_10)); | |
1da177e4 | 2405 | |
89d94756 HR |
2406 | if (sdkp->first_scan || old_capacity != sdkp->capacity) { |
2407 | sd_printk(KERN_NOTICE, sdkp, | |
2408 | "%llu %d-byte logical blocks: (%s/%s)\n", | |
2409 | (unsigned long long)sdkp->capacity, | |
2410 | sector_size, cap_str_10, cap_str_2); | |
53ad570b | 2411 | |
89d94756 HR |
2412 | if (sdkp->physical_block_size != sector_size) |
2413 | sd_printk(KERN_NOTICE, sdkp, | |
2414 | "%u-byte physical blocks\n", | |
2415 | sdkp->physical_block_size); | |
2416 | ||
2417 | sd_zbc_print_zones(sdkp); | |
2418 | } | |
1da177e4 LT |
2419 | } |
2420 | ||
2421 | /* called with buffer of length 512 */ | |
2422 | static inline int | |
ea73a9f2 JB |
2423 | sd_do_mode_sense(struct scsi_device *sdp, int dbd, int modepage, |
2424 | unsigned char *buffer, int len, struct scsi_mode_data *data, | |
2425 | struct scsi_sense_hdr *sshdr) | |
1da177e4 | 2426 | { |
ea73a9f2 | 2427 | return scsi_mode_sense(sdp, dbd, modepage, buffer, len, |
1cf72699 | 2428 | SD_TIMEOUT, SD_MAX_RETRIES, data, |
ea73a9f2 | 2429 | sshdr); |
1da177e4 LT |
2430 | } |
2431 | ||
2432 | /* | |
2433 | * read write protect setting, if possible - called only in sd_revalidate_disk() | |
48970800 | 2434 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
2435 | */ |
2436 | static void | |
e73aec82 | 2437 | sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer) |
ea73a9f2 | 2438 | { |
1da177e4 | 2439 | int res; |
ea73a9f2 | 2440 | struct scsi_device *sdp = sdkp->device; |
1da177e4 | 2441 | struct scsi_mode_data data; |
70a9b873 | 2442 | int old_wp = sdkp->write_prot; |
1da177e4 LT |
2443 | |
2444 | set_disk_ro(sdkp->disk, 0); | |
ea73a9f2 | 2445 | if (sdp->skip_ms_page_3f) { |
b2bff6ce | 2446 | sd_first_printk(KERN_NOTICE, sdkp, "Assuming Write Enabled\n"); |
1da177e4 LT |
2447 | return; |
2448 | } | |
2449 | ||
ea73a9f2 JB |
2450 | if (sdp->use_192_bytes_for_3f) { |
2451 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 192, &data, NULL); | |
1da177e4 LT |
2452 | } else { |
2453 | /* | |
2454 | * First attempt: ask for all pages (0x3F), but only 4 bytes. | |
2455 | * We have to start carefully: some devices hang if we ask | |
2456 | * for more than is available. | |
2457 | */ | |
ea73a9f2 | 2458 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 4, &data, NULL); |
1da177e4 LT |
2459 | |
2460 | /* | |
2461 | * Second attempt: ask for page 0 When only page 0 is | |
2462 | * implemented, a request for page 3F may return Sense Key | |
2463 | * 5: Illegal Request, Sense Code 24: Invalid field in | |
2464 | * CDB. | |
2465 | */ | |
2466 | if (!scsi_status_is_good(res)) | |
ea73a9f2 | 2467 | res = sd_do_mode_sense(sdp, 0, 0, buffer, 4, &data, NULL); |
1da177e4 LT |
2468 | |
2469 | /* | |
2470 | * Third attempt: ask 255 bytes, as we did earlier. | |
2471 | */ | |
2472 | if (!scsi_status_is_good(res)) | |
ea73a9f2 JB |
2473 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 255, |
2474 | &data, NULL); | |
1da177e4 LT |
2475 | } |
2476 | ||
2477 | if (!scsi_status_is_good(res)) { | |
b2bff6ce | 2478 | sd_first_printk(KERN_WARNING, sdkp, |
e73aec82 | 2479 | "Test WP failed, assume Write Enabled\n"); |
1da177e4 LT |
2480 | } else { |
2481 | sdkp->write_prot = ((data.device_specific & 0x80) != 0); | |
2482 | set_disk_ro(sdkp->disk, sdkp->write_prot); | |
70a9b873 MP |
2483 | if (sdkp->first_scan || old_wp != sdkp->write_prot) { |
2484 | sd_printk(KERN_NOTICE, sdkp, "Write Protect is %s\n", | |
2485 | sdkp->write_prot ? "on" : "off"); | |
df441cc0 | 2486 | sd_printk(KERN_DEBUG, sdkp, "Mode Sense: %4ph\n", buffer); |
70a9b873 | 2487 | } |
1da177e4 LT |
2488 | } |
2489 | } | |
2490 | ||
2491 | /* | |
2492 | * sd_read_cache_type - called only from sd_revalidate_disk() | |
48970800 | 2493 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
2494 | */ |
2495 | static void | |
e73aec82 | 2496 | sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer) |
631e8a13 | 2497 | { |
1da177e4 | 2498 | int len = 0, res; |
ea73a9f2 | 2499 | struct scsi_device *sdp = sdkp->device; |
1da177e4 | 2500 | |
631e8a13 AV |
2501 | int dbd; |
2502 | int modepage; | |
0bcaa111 | 2503 | int first_len; |
1da177e4 LT |
2504 | struct scsi_mode_data data; |
2505 | struct scsi_sense_hdr sshdr; | |
70a9b873 MP |
2506 | int old_wce = sdkp->WCE; |
2507 | int old_rcd = sdkp->RCD; | |
2508 | int old_dpofua = sdkp->DPOFUA; | |
1da177e4 | 2509 | |
39c60a09 JB |
2510 | |
2511 | if (sdkp->cache_override) | |
2512 | return; | |
2513 | ||
0bcaa111 LT |
2514 | first_len = 4; |
2515 | if (sdp->skip_ms_page_8) { | |
2516 | if (sdp->type == TYPE_RBC) | |
2517 | goto defaults; | |
2518 | else { | |
2519 | if (sdp->skip_ms_page_3f) | |
2520 | goto defaults; | |
2521 | modepage = 0x3F; | |
2522 | if (sdp->use_192_bytes_for_3f) | |
2523 | first_len = 192; | |
2524 | dbd = 0; | |
2525 | } | |
2526 | } else if (sdp->type == TYPE_RBC) { | |
631e8a13 AV |
2527 | modepage = 6; |
2528 | dbd = 8; | |
2529 | } else { | |
2530 | modepage = 8; | |
2531 | dbd = 0; | |
2532 | } | |
2533 | ||
1da177e4 | 2534 | /* cautiously ask */ |
0bcaa111 LT |
2535 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, first_len, |
2536 | &data, &sshdr); | |
1da177e4 LT |
2537 | |
2538 | if (!scsi_status_is_good(res)) | |
2539 | goto bad_sense; | |
2540 | ||
6d73c851 AV |
2541 | if (!data.header_length) { |
2542 | modepage = 6; | |
0bcaa111 | 2543 | first_len = 0; |
b2bff6ce MP |
2544 | sd_first_printk(KERN_ERR, sdkp, |
2545 | "Missing header in MODE_SENSE response\n"); | |
6d73c851 AV |
2546 | } |
2547 | ||
1da177e4 LT |
2548 | /* that went OK, now ask for the proper length */ |
2549 | len = data.length; | |
2550 | ||
2551 | /* | |
2552 | * We're only interested in the first three bytes, actually. | |
2553 | * But the data cache page is defined for the first 20. | |
2554 | */ | |
2555 | if (len < 3) | |
2556 | goto bad_sense; | |
0bcaa111 | 2557 | else if (len > SD_BUF_SIZE) { |
b2bff6ce | 2558 | sd_first_printk(KERN_NOTICE, sdkp, "Truncating mode parameter " |
0bcaa111 LT |
2559 | "data from %d to %d bytes\n", len, SD_BUF_SIZE); |
2560 | len = SD_BUF_SIZE; | |
2561 | } | |
2562 | if (modepage == 0x3F && sdp->use_192_bytes_for_3f) | |
2563 | len = 192; | |
1da177e4 LT |
2564 | |
2565 | /* Get the data */ | |
0bcaa111 LT |
2566 | if (len > first_len) |
2567 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, len, | |
2568 | &data, &sshdr); | |
1da177e4 LT |
2569 | |
2570 | if (scsi_status_is_good(res)) { | |
631e8a13 | 2571 | int offset = data.header_length + data.block_descriptor_length; |
1da177e4 | 2572 | |
0bcaa111 LT |
2573 | while (offset < len) { |
2574 | u8 page_code = buffer[offset] & 0x3F; | |
2575 | u8 spf = buffer[offset] & 0x40; | |
2576 | ||
2577 | if (page_code == 8 || page_code == 6) { | |
2578 | /* We're interested only in the first 3 bytes. | |
2579 | */ | |
2580 | if (len - offset <= 2) { | |
b2bff6ce MP |
2581 | sd_first_printk(KERN_ERR, sdkp, |
2582 | "Incomplete mode parameter " | |
2583 | "data\n"); | |
0bcaa111 LT |
2584 | goto defaults; |
2585 | } else { | |
2586 | modepage = page_code; | |
2587 | goto Page_found; | |
2588 | } | |
2589 | } else { | |
2590 | /* Go to the next page */ | |
2591 | if (spf && len - offset > 3) | |
2592 | offset += 4 + (buffer[offset+2] << 8) + | |
2593 | buffer[offset+3]; | |
2594 | else if (!spf && len - offset > 1) | |
2595 | offset += 2 + buffer[offset+1]; | |
2596 | else { | |
b2bff6ce MP |
2597 | sd_first_printk(KERN_ERR, sdkp, |
2598 | "Incomplete mode " | |
2599 | "parameter data\n"); | |
0bcaa111 LT |
2600 | goto defaults; |
2601 | } | |
2602 | } | |
48970800 AV |
2603 | } |
2604 | ||
b2bff6ce | 2605 | sd_first_printk(KERN_ERR, sdkp, "No Caching mode page found\n"); |
984f1733 AS |
2606 | goto defaults; |
2607 | ||
0bcaa111 | 2608 | Page_found: |
631e8a13 AV |
2609 | if (modepage == 8) { |
2610 | sdkp->WCE = ((buffer[offset + 2] & 0x04) != 0); | |
2611 | sdkp->RCD = ((buffer[offset + 2] & 0x01) != 0); | |
2612 | } else { | |
2613 | sdkp->WCE = ((buffer[offset + 2] & 0x01) == 0); | |
2614 | sdkp->RCD = 0; | |
2615 | } | |
1da177e4 | 2616 | |
007365ad | 2617 | sdkp->DPOFUA = (data.device_specific & 0x10) != 0; |
b14bf2d0 AS |
2618 | if (sdp->broken_fua) { |
2619 | sd_first_printk(KERN_NOTICE, sdkp, "Disabling FUA\n"); | |
2620 | sdkp->DPOFUA = 0; | |
26f28197 DLM |
2621 | } else if (sdkp->DPOFUA && !sdkp->device->use_10_for_rw && |
2622 | !sdkp->device->use_16_for_rw) { | |
b2bff6ce | 2623 | sd_first_printk(KERN_NOTICE, sdkp, |
e73aec82 | 2624 | "Uses READ/WRITE(6), disabling FUA\n"); |
007365ad TH |
2625 | sdkp->DPOFUA = 0; |
2626 | } | |
2627 | ||
2eefd57b SRT |
2628 | /* No cache flush allowed for write protected devices */ |
2629 | if (sdkp->WCE && sdkp->write_prot) | |
2630 | sdkp->WCE = 0; | |
2631 | ||
70a9b873 MP |
2632 | if (sdkp->first_scan || old_wce != sdkp->WCE || |
2633 | old_rcd != sdkp->RCD || old_dpofua != sdkp->DPOFUA) | |
2634 | sd_printk(KERN_NOTICE, sdkp, | |
2635 | "Write cache: %s, read cache: %s, %s\n", | |
2636 | sdkp->WCE ? "enabled" : "disabled", | |
2637 | sdkp->RCD ? "disabled" : "enabled", | |
2638 | sdkp->DPOFUA ? "supports DPO and FUA" | |
2639 | : "doesn't support DPO or FUA"); | |
1da177e4 LT |
2640 | |
2641 | return; | |
2642 | } | |
2643 | ||
2644 | bad_sense: | |
ea73a9f2 | 2645 | if (scsi_sense_valid(&sshdr) && |
1da177e4 LT |
2646 | sshdr.sense_key == ILLEGAL_REQUEST && |
2647 | sshdr.asc == 0x24 && sshdr.ascq == 0x0) | |
e73aec82 | 2648 | /* Invalid field in CDB */ |
b2bff6ce | 2649 | sd_first_printk(KERN_NOTICE, sdkp, "Cache data unavailable\n"); |
1da177e4 | 2650 | else |
b2bff6ce MP |
2651 | sd_first_printk(KERN_ERR, sdkp, |
2652 | "Asking for cache data failed\n"); | |
1da177e4 LT |
2653 | |
2654 | defaults: | |
b81478d8 | 2655 | if (sdp->wce_default_on) { |
b2bff6ce MP |
2656 | sd_first_printk(KERN_NOTICE, sdkp, |
2657 | "Assuming drive cache: write back\n"); | |
b81478d8 NJ |
2658 | sdkp->WCE = 1; |
2659 | } else { | |
b2bff6ce MP |
2660 | sd_first_printk(KERN_ERR, sdkp, |
2661 | "Assuming drive cache: write through\n"); | |
b81478d8 NJ |
2662 | sdkp->WCE = 0; |
2663 | } | |
1da177e4 | 2664 | sdkp->RCD = 0; |
48970800 | 2665 | sdkp->DPOFUA = 0; |
1da177e4 LT |
2666 | } |
2667 | ||
e0597d70 MP |
2668 | /* |
2669 | * The ATO bit indicates whether the DIF application tag is available | |
2670 | * for use by the operating system. | |
2671 | */ | |
439d77f7 | 2672 | static void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer) |
e0597d70 MP |
2673 | { |
2674 | int res, offset; | |
2675 | struct scsi_device *sdp = sdkp->device; | |
2676 | struct scsi_mode_data data; | |
2677 | struct scsi_sense_hdr sshdr; | |
2678 | ||
89d94756 | 2679 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) |
e0597d70 MP |
2680 | return; |
2681 | ||
2682 | if (sdkp->protection_type == 0) | |
2683 | return; | |
2684 | ||
2685 | res = scsi_mode_sense(sdp, 1, 0x0a, buffer, 36, SD_TIMEOUT, | |
2686 | SD_MAX_RETRIES, &data, &sshdr); | |
2687 | ||
2688 | if (!scsi_status_is_good(res) || !data.header_length || | |
2689 | data.length < 6) { | |
b2bff6ce | 2690 | sd_first_printk(KERN_WARNING, sdkp, |
e0597d70 MP |
2691 | "getting Control mode page failed, assume no ATO\n"); |
2692 | ||
2693 | if (scsi_sense_valid(&sshdr)) | |
2694 | sd_print_sense_hdr(sdkp, &sshdr); | |
2695 | ||
2696 | return; | |
2697 | } | |
2698 | ||
2699 | offset = data.header_length + data.block_descriptor_length; | |
2700 | ||
2701 | if ((buffer[offset] & 0x3f) != 0x0a) { | |
b2bff6ce | 2702 | sd_first_printk(KERN_ERR, sdkp, "ATO Got wrong page\n"); |
e0597d70 MP |
2703 | return; |
2704 | } | |
2705 | ||
2706 | if ((buffer[offset + 5] & 0x80) == 0) | |
2707 | return; | |
2708 | ||
2709 | sdkp->ATO = 1; | |
2710 | ||
2711 | return; | |
2712 | } | |
2713 | ||
d11b6916 MP |
2714 | /** |
2715 | * sd_read_block_limits - Query disk device for preferred I/O sizes. | |
2716 | * @disk: disk to query | |
2717 | */ | |
2718 | static void sd_read_block_limits(struct scsi_disk *sdkp) | |
2719 | { | |
2720 | unsigned int sector_sz = sdkp->device->sector_size; | |
bb2d3de1 | 2721 | const int vpd_len = 64; |
e3deec09 | 2722 | unsigned char *buffer = kmalloc(vpd_len, GFP_KERNEL); |
d11b6916 | 2723 | |
e3deec09 JB |
2724 | if (!buffer || |
2725 | /* Block Limits VPD */ | |
2726 | scsi_get_vpd_page(sdkp->device, 0xb0, buffer, vpd_len)) | |
2727 | goto out; | |
d11b6916 MP |
2728 | |
2729 | blk_queue_io_min(sdkp->disk->queue, | |
2730 | get_unaligned_be16(&buffer[6]) * sector_sz); | |
ca369d51 MP |
2731 | |
2732 | sdkp->max_xfer_blocks = get_unaligned_be32(&buffer[8]); | |
2733 | sdkp->opt_xfer_blocks = get_unaligned_be32(&buffer[12]); | |
d11b6916 | 2734 | |
c98a0eb0 MP |
2735 | if (buffer[3] == 0x3c) { |
2736 | unsigned int lba_count, desc_count; | |
e339c1a7 | 2737 | |
5db44863 | 2738 | sdkp->max_ws_blocks = (u32)get_unaligned_be64(&buffer[36]); |
e339c1a7 | 2739 | |
c98a0eb0 | 2740 | if (!sdkp->lbpme) |
045d3fe7 | 2741 | goto out; |
045d3fe7 | 2742 | |
c98a0eb0 MP |
2743 | lba_count = get_unaligned_be32(&buffer[20]); |
2744 | desc_count = get_unaligned_be32(&buffer[24]); | |
045d3fe7 | 2745 | |
c98a0eb0 MP |
2746 | if (lba_count && desc_count) |
2747 | sdkp->max_unmap_blocks = lba_count; | |
e339c1a7 | 2748 | |
c98a0eb0 | 2749 | sdkp->unmap_granularity = get_unaligned_be32(&buffer[28]); |
e339c1a7 MP |
2750 | |
2751 | if (buffer[32] & 0x80) | |
c98a0eb0 | 2752 | sdkp->unmap_alignment = |
e339c1a7 | 2753 | get_unaligned_be32(&buffer[32]) & ~(1 << 31); |
c98a0eb0 MP |
2754 | |
2755 | if (!sdkp->lbpvpd) { /* LBP VPD page not provided */ | |
2756 | ||
2757 | if (sdkp->max_unmap_blocks) | |
2758 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
2759 | else | |
2760 | sd_config_discard(sdkp, SD_LBP_WS16); | |
2761 | ||
2762 | } else { /* LBP VPD page tells us what to use */ | |
e461338b MP |
2763 | if (sdkp->lbpu && sdkp->max_unmap_blocks && !sdkp->lbprz) |
2764 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
2765 | else if (sdkp->lbpws) | |
c98a0eb0 MP |
2766 | sd_config_discard(sdkp, SD_LBP_WS16); |
2767 | else if (sdkp->lbpws10) | |
2768 | sd_config_discard(sdkp, SD_LBP_WS10); | |
7985090a MP |
2769 | else if (sdkp->lbpu && sdkp->max_unmap_blocks) |
2770 | sd_config_discard(sdkp, SD_LBP_UNMAP); | |
c98a0eb0 MP |
2771 | else |
2772 | sd_config_discard(sdkp, SD_LBP_DISABLE); | |
2773 | } | |
e339c1a7 MP |
2774 | } |
2775 | ||
e3deec09 | 2776 | out: |
d11b6916 MP |
2777 | kfree(buffer); |
2778 | } | |
2779 | ||
3821d768 MP |
2780 | /** |
2781 | * sd_read_block_characteristics - Query block dev. characteristics | |
2782 | * @disk: disk to query | |
2783 | */ | |
2784 | static void sd_read_block_characteristics(struct scsi_disk *sdkp) | |
2785 | { | |
89d94756 | 2786 | struct request_queue *q = sdkp->disk->queue; |
e3deec09 | 2787 | unsigned char *buffer; |
3821d768 | 2788 | u16 rot; |
bb2d3de1 | 2789 | const int vpd_len = 64; |
3821d768 | 2790 | |
e3deec09 | 2791 | buffer = kmalloc(vpd_len, GFP_KERNEL); |
3821d768 | 2792 | |
e3deec09 JB |
2793 | if (!buffer || |
2794 | /* Block Device Characteristics VPD */ | |
2795 | scsi_get_vpd_page(sdkp->device, 0xb1, buffer, vpd_len)) | |
2796 | goto out; | |
3821d768 MP |
2797 | |
2798 | rot = get_unaligned_be16(&buffer[4]); | |
2799 | ||
b277da0a | 2800 | if (rot == 1) { |
89d94756 HR |
2801 | queue_flag_set_unlocked(QUEUE_FLAG_NONROT, q); |
2802 | queue_flag_clear_unlocked(QUEUE_FLAG_ADD_RANDOM, q); | |
b277da0a | 2803 | } |
3821d768 | 2804 | |
68af412c DLM |
2805 | if (sdkp->device->type == TYPE_ZBC) { |
2806 | /* Host-managed */ | |
89d94756 | 2807 | q->limits.zoned = BLK_ZONED_HM; |
68af412c DLM |
2808 | } else { |
2809 | sdkp->zoned = (buffer[8] >> 4) & 3; | |
2810 | if (sdkp->zoned == 1) | |
2811 | /* Host-aware */ | |
2812 | q->limits.zoned = BLK_ZONED_HA; | |
2813 | else | |
2814 | /* | |
2815 | * Treat drive-managed devices as | |
2816 | * regular block devices. | |
2817 | */ | |
2818 | q->limits.zoned = BLK_ZONED_NONE; | |
2819 | } | |
89d94756 HR |
2820 | if (blk_queue_is_zoned(q) && sdkp->first_scan) |
2821 | sd_printk(KERN_NOTICE, sdkp, "Host-%s zoned block device\n", | |
2822 | q->limits.zoned == BLK_ZONED_HM ? "managed" : "aware"); | |
2823 | ||
e3deec09 | 2824 | out: |
3821d768 MP |
2825 | kfree(buffer); |
2826 | } | |
2827 | ||
045d3fe7 | 2828 | /** |
c98a0eb0 | 2829 | * sd_read_block_provisioning - Query provisioning VPD page |
045d3fe7 MP |
2830 | * @disk: disk to query |
2831 | */ | |
c98a0eb0 | 2832 | static void sd_read_block_provisioning(struct scsi_disk *sdkp) |
045d3fe7 MP |
2833 | { |
2834 | unsigned char *buffer; | |
2835 | const int vpd_len = 8; | |
2836 | ||
c98a0eb0 | 2837 | if (sdkp->lbpme == 0) |
045d3fe7 MP |
2838 | return; |
2839 | ||
2840 | buffer = kmalloc(vpd_len, GFP_KERNEL); | |
2841 | ||
2842 | if (!buffer || scsi_get_vpd_page(sdkp->device, 0xb2, buffer, vpd_len)) | |
2843 | goto out; | |
2844 | ||
c98a0eb0 MP |
2845 | sdkp->lbpvpd = 1; |
2846 | sdkp->lbpu = (buffer[5] >> 7) & 1; /* UNMAP */ | |
2847 | sdkp->lbpws = (buffer[5] >> 6) & 1; /* WRITE SAME(16) with UNMAP */ | |
2848 | sdkp->lbpws10 = (buffer[5] >> 5) & 1; /* WRITE SAME(10) with UNMAP */ | |
045d3fe7 MP |
2849 | |
2850 | out: | |
2851 | kfree(buffer); | |
2852 | } | |
2853 | ||
5db44863 MP |
2854 | static void sd_read_write_same(struct scsi_disk *sdkp, unsigned char *buffer) |
2855 | { | |
66c28f97 MP |
2856 | struct scsi_device *sdev = sdkp->device; |
2857 | ||
54b2b50c MP |
2858 | if (sdev->host->no_write_same) { |
2859 | sdev->no_write_same = 1; | |
2860 | ||
2861 | return; | |
2862 | } | |
2863 | ||
66c28f97 | 2864 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, INQUIRY) < 0) { |
af73623f BS |
2865 | /* too large values might cause issues with arcmsr */ |
2866 | int vpd_buf_len = 64; | |
2867 | ||
66c28f97 MP |
2868 | sdev->no_report_opcodes = 1; |
2869 | ||
2870 | /* Disable WRITE SAME if REPORT SUPPORTED OPERATION | |
2871 | * CODES is unsupported and the device has an ATA | |
2872 | * Information VPD page (SAT). | |
2873 | */ | |
af73623f | 2874 | if (!scsi_get_vpd_page(sdev, 0x89, buffer, vpd_buf_len)) |
66c28f97 MP |
2875 | sdev->no_write_same = 1; |
2876 | } | |
2877 | ||
2878 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME_16) == 1) | |
5db44863 | 2879 | sdkp->ws16 = 1; |
66c28f97 MP |
2880 | |
2881 | if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME) == 1) | |
2882 | sdkp->ws10 = 1; | |
5db44863 MP |
2883 | } |
2884 | ||
1da177e4 LT |
2885 | /** |
2886 | * sd_revalidate_disk - called the first time a new disk is seen, | |
2887 | * performs disk spin up, read_capacity, etc. | |
2888 | * @disk: struct gendisk we care about | |
2889 | **/ | |
2890 | static int sd_revalidate_disk(struct gendisk *disk) | |
2891 | { | |
2892 | struct scsi_disk *sdkp = scsi_disk(disk); | |
2893 | struct scsi_device *sdp = sdkp->device; | |
ca369d51 | 2894 | struct request_queue *q = sdkp->disk->queue; |
89d94756 | 2895 | sector_t old_capacity = sdkp->capacity; |
1da177e4 | 2896 | unsigned char *buffer; |
ca369d51 | 2897 | unsigned int dev_max, rw_max; |
1da177e4 | 2898 | |
fa0d34be MP |
2899 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, |
2900 | "sd_revalidate_disk\n")); | |
1da177e4 LT |
2901 | |
2902 | /* | |
2903 | * If the device is offline, don't try and read capacity or any | |
2904 | * of the other niceties. | |
2905 | */ | |
2906 | if (!scsi_device_online(sdp)) | |
2907 | goto out; | |
2908 | ||
a6123f14 | 2909 | buffer = kmalloc(SD_BUF_SIZE, GFP_KERNEL); |
1da177e4 | 2910 | if (!buffer) { |
e73aec82 MP |
2911 | sd_printk(KERN_WARNING, sdkp, "sd_revalidate_disk: Memory " |
2912 | "allocation failure.\n"); | |
ea73a9f2 | 2913 | goto out; |
1da177e4 LT |
2914 | } |
2915 | ||
e73aec82 | 2916 | sd_spinup_disk(sdkp); |
1da177e4 LT |
2917 | |
2918 | /* | |
2919 | * Without media there is no reason to ask; moreover, some devices | |
2920 | * react badly if we do. | |
2921 | */ | |
2922 | if (sdkp->media_present) { | |
e73aec82 | 2923 | sd_read_capacity(sdkp, buffer); |
ffd4bc2a | 2924 | |
5ddfe085 | 2925 | if (scsi_device_supports_vpd(sdp)) { |
c98a0eb0 | 2926 | sd_read_block_provisioning(sdkp); |
ffd4bc2a MP |
2927 | sd_read_block_limits(sdkp); |
2928 | sd_read_block_characteristics(sdkp); | |
89d94756 | 2929 | sd_zbc_read_zones(sdkp, buffer); |
ffd4bc2a MP |
2930 | } |
2931 | ||
89d94756 HR |
2932 | sd_print_capacity(sdkp, old_capacity); |
2933 | ||
e73aec82 MP |
2934 | sd_read_write_protect_flag(sdkp, buffer); |
2935 | sd_read_cache_type(sdkp, buffer); | |
e0597d70 | 2936 | sd_read_app_tag_own(sdkp, buffer); |
5db44863 | 2937 | sd_read_write_same(sdkp, buffer); |
1da177e4 | 2938 | } |
461d4e90 | 2939 | |
70a9b873 MP |
2940 | sdkp->first_scan = 0; |
2941 | ||
461d4e90 TH |
2942 | /* |
2943 | * We now have all cache related info, determine how we deal | |
4913efe4 | 2944 | * with flush requests. |
461d4e90 | 2945 | */ |
cb2fb68d | 2946 | sd_set_flush_flag(sdkp); |
461d4e90 | 2947 | |
ca369d51 MP |
2948 | /* Initial block count limit based on CDB TRANSFER LENGTH field size. */ |
2949 | dev_max = sdp->use_16_for_rw ? SD_MAX_XFER_BLOCKS : SD_DEF_XFER_BLOCKS; | |
2950 | ||
2951 | /* Some devices report a maximum block count for READ/WRITE requests. */ | |
2952 | dev_max = min_not_zero(dev_max, sdkp->max_xfer_blocks); | |
2953 | q->limits.max_dev_sectors = logical_to_sectors(sdp, dev_max); | |
2954 | ||
2955 | /* | |
2956 | * Use the device's preferred I/O size for reads and writes | |
9c1d9c20 MP |
2957 | * unless the reported value is unreasonably small, large, or |
2958 | * garbage. | |
ca369d51 | 2959 | */ |
9c1d9c20 MP |
2960 | if (sdkp->opt_xfer_blocks && |
2961 | sdkp->opt_xfer_blocks <= dev_max && | |
2962 | sdkp->opt_xfer_blocks <= SD_DEF_XFER_BLOCKS && | |
6b7e9cde MP |
2963 | logical_to_bytes(sdp, sdkp->opt_xfer_blocks) >= PAGE_SIZE) { |
2964 | q->limits.io_opt = logical_to_bytes(sdp, sdkp->opt_xfer_blocks); | |
2965 | rw_max = logical_to_sectors(sdp, sdkp->opt_xfer_blocks); | |
2966 | } else | |
ca369d51 | 2967 | rw_max = BLK_DEF_MAX_SECTORS; |
3a9794d3 | 2968 | |
ca369d51 MP |
2969 | /* Combine with controller limits */ |
2970 | q->limits.max_sectors = min(rw_max, queue_max_hw_sectors(q)); | |
4f258a46 | 2971 | |
f08bb1e0 | 2972 | set_capacity(disk, logical_to_sectors(sdp, sdkp->capacity)); |
5db44863 | 2973 | sd_config_write_same(sdkp); |
1da177e4 LT |
2974 | kfree(buffer); |
2975 | ||
1da177e4 LT |
2976 | out: |
2977 | return 0; | |
2978 | } | |
2979 | ||
72ec24bd TH |
2980 | /** |
2981 | * sd_unlock_native_capacity - unlock native capacity | |
2982 | * @disk: struct gendisk to set capacity for | |
2983 | * | |
2984 | * Block layer calls this function if it detects that partitions | |
2985 | * on @disk reach beyond the end of the device. If the SCSI host | |
2986 | * implements ->unlock_native_capacity() method, it's invoked to | |
2987 | * give it a chance to adjust the device capacity. | |
2988 | * | |
2989 | * CONTEXT: | |
2990 | * Defined by block layer. Might sleep. | |
2991 | */ | |
2992 | static void sd_unlock_native_capacity(struct gendisk *disk) | |
2993 | { | |
2994 | struct scsi_device *sdev = scsi_disk(disk)->device; | |
2995 | ||
2996 | if (sdev->host->hostt->unlock_native_capacity) | |
2997 | sdev->host->hostt->unlock_native_capacity(sdev); | |
2998 | } | |
2999 | ||
3e1a7ff8 TH |
3000 | /** |
3001 | * sd_format_disk_name - format disk name | |
3002 | * @prefix: name prefix - ie. "sd" for SCSI disks | |
3003 | * @index: index of the disk to format name for | |
3004 | * @buf: output buffer | |
3005 | * @buflen: length of the output buffer | |
3006 | * | |
3007 | * SCSI disk names starts at sda. The 26th device is sdz and the | |
3008 | * 27th is sdaa. The last one for two lettered suffix is sdzz | |
3009 | * which is followed by sdaaa. | |
3010 | * | |
3011 | * This is basically 26 base counting with one extra 'nil' entry | |
3ad2f3fb | 3012 | * at the beginning from the second digit on and can be |
3e1a7ff8 TH |
3013 | * determined using similar method as 26 base conversion with the |
3014 | * index shifted -1 after each digit is computed. | |
3015 | * | |
3016 | * CONTEXT: | |
3017 | * Don't care. | |
3018 | * | |
3019 | * RETURNS: | |
3020 | * 0 on success, -errno on failure. | |
3021 | */ | |
3022 | static int sd_format_disk_name(char *prefix, int index, char *buf, int buflen) | |
3023 | { | |
3024 | const int base = 'z' - 'a' + 1; | |
3025 | char *begin = buf + strlen(prefix); | |
3026 | char *end = buf + buflen; | |
3027 | char *p; | |
3028 | int unit; | |
3029 | ||
3030 | p = end - 1; | |
3031 | *p = '\0'; | |
3032 | unit = base; | |
3033 | do { | |
3034 | if (p == begin) | |
3035 | return -EINVAL; | |
3036 | *--p = 'a' + (index % unit); | |
3037 | index = (index / unit) - 1; | |
3038 | } while (index >= 0); | |
3039 | ||
3040 | memmove(begin, p, end - p); | |
3041 | memcpy(buf, prefix, strlen(prefix)); | |
3042 | ||
3043 | return 0; | |
3044 | } | |
3045 | ||
4ace92fc AV |
3046 | /* |
3047 | * The asynchronous part of sd_probe | |
3048 | */ | |
3049 | static void sd_probe_async(void *data, async_cookie_t cookie) | |
3050 | { | |
3051 | struct scsi_disk *sdkp = data; | |
3052 | struct scsi_device *sdp; | |
3053 | struct gendisk *gd; | |
3054 | u32 index; | |
3055 | struct device *dev; | |
3056 | ||
3057 | sdp = sdkp->device; | |
3058 | gd = sdkp->disk; | |
3059 | index = sdkp->index; | |
3060 | dev = &sdp->sdev_gendev; | |
3061 | ||
1a03ae0f MR |
3062 | gd->major = sd_major((index & 0xf0) >> 4); |
3063 | gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00); | |
3064 | gd->minors = SD_MINORS; | |
3065 | ||
4ace92fc AV |
3066 | gd->fops = &sd_fops; |
3067 | gd->private_data = &sdkp->driver; | |
3068 | gd->queue = sdkp->device->request_queue; | |
3069 | ||
70a9b873 MP |
3070 | /* defaults, until the device tells us otherwise */ |
3071 | sdp->sector_size = 512; | |
3072 | sdkp->capacity = 0; | |
3073 | sdkp->media_present = 1; | |
3074 | sdkp->write_prot = 0; | |
39c60a09 | 3075 | sdkp->cache_override = 0; |
70a9b873 MP |
3076 | sdkp->WCE = 0; |
3077 | sdkp->RCD = 0; | |
3078 | sdkp->ATO = 0; | |
3079 | sdkp->first_scan = 1; | |
18a4d0a2 | 3080 | sdkp->max_medium_access_timeouts = SD_MAX_MEDIUM_TIMEOUTS; |
70a9b873 | 3081 | |
4ace92fc AV |
3082 | sd_revalidate_disk(gd); |
3083 | ||
97fedbbe | 3084 | gd->flags = GENHD_FL_EXT_DEVT; |
2bae0093 | 3085 | if (sdp->removable) { |
4ace92fc | 3086 | gd->flags |= GENHD_FL_REMOVABLE; |
2bae0093 TH |
3087 | gd->events |= DISK_EVENT_MEDIA_CHANGE; |
3088 | } | |
4ace92fc | 3089 | |
10c580e4 | 3090 | blk_pm_runtime_init(sdp->request_queue, dev); |
0d52c756 | 3091 | device_add_disk(dev, gd); |
fe542396 MP |
3092 | if (sdkp->capacity) |
3093 | sd_dif_config_host(sdkp); | |
4ace92fc | 3094 | |
3821d768 MP |
3095 | sd_revalidate_disk(gd); |
3096 | ||
4ace92fc AV |
3097 | sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n", |
3098 | sdp->removable ? "removable " : ""); | |
478a8a05 | 3099 | scsi_autopm_put_device(sdp); |
ea038f63 | 3100 | put_device(&sdkp->dev); |
4ace92fc AV |
3101 | } |
3102 | ||
1da177e4 LT |
3103 | /** |
3104 | * sd_probe - called during driver initialization and whenever a | |
3105 | * new scsi device is attached to the system. It is called once | |
3106 | * for each scsi device (not just disks) present. | |
3107 | * @dev: pointer to device object | |
3108 | * | |
3109 | * Returns 0 if successful (or not interested in this scsi device | |
3110 | * (e.g. scanner)); 1 when there is an error. | |
3111 | * | |
3112 | * Note: this function is invoked from the scsi mid-level. | |
3113 | * This function sets up the mapping between a given | |
3114 | * <host,channel,id,lun> (found in sdp) and new device name | |
3115 | * (e.g. /dev/sda). More precisely it is the block device major | |
3116 | * and minor number that is chosen here. | |
3117 | * | |
2db93ce8 PU |
3118 | * Assume sd_probe is not re-entrant (for time being) |
3119 | * Also think about sd_probe() and sd_remove() running coincidentally. | |
1da177e4 LT |
3120 | **/ |
3121 | static int sd_probe(struct device *dev) | |
3122 | { | |
3123 | struct scsi_device *sdp = to_scsi_device(dev); | |
3124 | struct scsi_disk *sdkp; | |
3125 | struct gendisk *gd; | |
439d77f7 | 3126 | int index; |
1da177e4 LT |
3127 | int error; |
3128 | ||
6fe8c1db | 3129 | scsi_autopm_get_device(sdp); |
1da177e4 | 3130 | error = -ENODEV; |
89d94756 HR |
3131 | if (sdp->type != TYPE_DISK && |
3132 | sdp->type != TYPE_ZBC && | |
3133 | sdp->type != TYPE_MOD && | |
3134 | sdp->type != TYPE_RBC) | |
1da177e4 LT |
3135 | goto out; |
3136 | ||
89d94756 HR |
3137 | #ifndef CONFIG_BLK_DEV_ZONED |
3138 | if (sdp->type == TYPE_ZBC) | |
3139 | goto out; | |
3140 | #endif | |
9ccfc756 | 3141 | SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO, sdp, |
2db93ce8 | 3142 | "sd_probe\n")); |
1da177e4 LT |
3143 | |
3144 | error = -ENOMEM; | |
24669f75 | 3145 | sdkp = kzalloc(sizeof(*sdkp), GFP_KERNEL); |
1da177e4 LT |
3146 | if (!sdkp) |
3147 | goto out; | |
3148 | ||
689d6fac | 3149 | gd = alloc_disk(SD_MINORS); |
1da177e4 | 3150 | if (!gd) |
c01228db | 3151 | goto out_free; |
1da177e4 | 3152 | |
f27bac27 TH |
3153 | do { |
3154 | if (!ida_pre_get(&sd_index_ida, GFP_KERNEL)) | |
3155 | goto out_put; | |
1da177e4 | 3156 | |
4034cc68 | 3157 | spin_lock(&sd_index_lock); |
f27bac27 | 3158 | error = ida_get_new(&sd_index_ida, &index); |
4034cc68 | 3159 | spin_unlock(&sd_index_lock); |
f27bac27 | 3160 | } while (error == -EAGAIN); |
1da177e4 | 3161 | |
21208ae5 DK |
3162 | if (error) { |
3163 | sdev_printk(KERN_WARNING, sdp, "sd_probe: memory exhausted.\n"); | |
1da177e4 | 3164 | goto out_put; |
1a03ae0f MR |
3165 | } |
3166 | ||
3e1a7ff8 | 3167 | error = sd_format_disk_name("sd", index, gd->disk_name, DISK_NAME_LEN); |
21208ae5 DK |
3168 | if (error) { |
3169 | sdev_printk(KERN_WARNING, sdp, "SCSI disk (sd) name length exceeded.\n"); | |
f27bac27 | 3170 | goto out_free_index; |
21208ae5 | 3171 | } |
f27bac27 | 3172 | |
1da177e4 LT |
3173 | sdkp->device = sdp; |
3174 | sdkp->driver = &sd_template; | |
3175 | sdkp->disk = gd; | |
3176 | sdkp->index = index; | |
409f3499 | 3177 | atomic_set(&sdkp->openers, 0); |
9e1a1537 | 3178 | atomic_set(&sdkp->device->ioerr_cnt, 0); |
1da177e4 | 3179 | |
601e7638 JB |
3180 | if (!sdp->request_queue->rq_timeout) { |
3181 | if (sdp->type != TYPE_MOD) | |
3182 | blk_queue_rq_timeout(sdp->request_queue, SD_TIMEOUT); | |
3183 | else | |
3184 | blk_queue_rq_timeout(sdp->request_queue, | |
3185 | SD_MOD_TIMEOUT); | |
3186 | } | |
3187 | ||
3188 | device_initialize(&sdkp->dev); | |
478a8a05 | 3189 | sdkp->dev.parent = dev; |
601e7638 | 3190 | sdkp->dev.class = &sd_disk_class; |
02aa2a37 | 3191 | dev_set_name(&sdkp->dev, "%s", dev_name(dev)); |
601e7638 | 3192 | |
dee0586e DC |
3193 | error = device_add(&sdkp->dev); |
3194 | if (error) | |
601e7638 JB |
3195 | goto out_free_index; |
3196 | ||
478a8a05 AS |
3197 | get_device(dev); |
3198 | dev_set_drvdata(dev, sdkp); | |
601e7638 | 3199 | |
ea038f63 | 3200 | get_device(&sdkp->dev); /* prevent release before async_schedule */ |
a7a20d10 | 3201 | async_schedule_domain(sd_probe_async, sdkp, &scsi_sd_probe_domain); |
1da177e4 LT |
3202 | |
3203 | return 0; | |
3204 | ||
f27bac27 | 3205 | out_free_index: |
c01228db JK |
3206 | spin_lock(&sd_index_lock); |
3207 | ida_remove(&sd_index_ida, index); | |
3208 | spin_unlock(&sd_index_lock); | |
6bdaa1f1 | 3209 | out_put: |
1da177e4 | 3210 | put_disk(gd); |
f170396c CIK |
3211 | out_free: |
3212 | kfree(sdkp); | |
6bdaa1f1 | 3213 | out: |
6fe8c1db | 3214 | scsi_autopm_put_device(sdp); |
1da177e4 LT |
3215 | return error; |
3216 | } | |
3217 | ||
3218 | /** | |
3219 | * sd_remove - called whenever a scsi disk (previously recognized by | |
3220 | * sd_probe) is detached from the system. It is called (potentially | |
3221 | * multiple times) during sd module unload. | |
f2a3313d | 3222 | * @dev: pointer to device object |
1da177e4 LT |
3223 | * |
3224 | * Note: this function is invoked from the scsi mid-level. | |
3225 | * This function potentially frees up a device name (e.g. /dev/sdc) | |
3226 | * that could be re-used by a subsequent sd_probe(). | |
3227 | * This function is not called when the built-in sd driver is "exit-ed". | |
3228 | **/ | |
3229 | static int sd_remove(struct device *dev) | |
3230 | { | |
601e7638 | 3231 | struct scsi_disk *sdkp; |
0761df9c | 3232 | dev_t devt; |
1da177e4 | 3233 | |
601e7638 | 3234 | sdkp = dev_get_drvdata(dev); |
0761df9c | 3235 | devt = disk_devt(sdkp->disk); |
478a8a05 AS |
3236 | scsi_autopm_get_device(sdkp->device); |
3237 | ||
3c31b52f | 3238 | async_synchronize_full_domain(&scsi_sd_pm_domain); |
a7a20d10 | 3239 | async_synchronize_full_domain(&scsi_sd_probe_domain); |
ee959b00 | 3240 | device_del(&sdkp->dev); |
1da177e4 LT |
3241 | del_gendisk(sdkp->disk); |
3242 | sd_shutdown(dev); | |
39b7f1e2 | 3243 | |
89d94756 HR |
3244 | sd_zbc_remove(sdkp); |
3245 | ||
0761df9c HR |
3246 | blk_register_region(devt, SD_MINORS, NULL, |
3247 | sd_default_probe, NULL, NULL); | |
3248 | ||
0b950672 | 3249 | mutex_lock(&sd_ref_mutex); |
39b7f1e2 | 3250 | dev_set_drvdata(dev, NULL); |
ee959b00 | 3251 | put_device(&sdkp->dev); |
0b950672 | 3252 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
3253 | |
3254 | return 0; | |
3255 | } | |
3256 | ||
3257 | /** | |
3258 | * scsi_disk_release - Called to free the scsi_disk structure | |
ee959b00 | 3259 | * @dev: pointer to embedded class device |
1da177e4 | 3260 | * |
0b950672 | 3261 | * sd_ref_mutex must be held entering this routine. Because it is |
1da177e4 LT |
3262 | * called on last put, you should always use the scsi_disk_get() |
3263 | * scsi_disk_put() helpers which manipulate the semaphore directly | |
ee959b00 | 3264 | * and never do a direct put_device. |
1da177e4 | 3265 | **/ |
ee959b00 | 3266 | static void scsi_disk_release(struct device *dev) |
1da177e4 | 3267 | { |
ee959b00 | 3268 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
1da177e4 LT |
3269 | struct gendisk *disk = sdkp->disk; |
3270 | ||
c01228db JK |
3271 | spin_lock(&sd_index_lock); |
3272 | ida_remove(&sd_index_ida, sdkp->index); | |
3273 | spin_unlock(&sd_index_lock); | |
3274 | ||
1da177e4 | 3275 | disk->private_data = NULL; |
1da177e4 | 3276 | put_disk(disk); |
39b7f1e2 | 3277 | put_device(&sdkp->device->sdev_gendev); |
1da177e4 LT |
3278 | |
3279 | kfree(sdkp); | |
3280 | } | |
3281 | ||
cc5d2c8c | 3282 | static int sd_start_stop_device(struct scsi_disk *sdkp, int start) |
c3c94c5a TH |
3283 | { |
3284 | unsigned char cmd[6] = { START_STOP }; /* START_VALID */ | |
3285 | struct scsi_sense_hdr sshdr; | |
cc5d2c8c | 3286 | struct scsi_device *sdp = sdkp->device; |
c3c94c5a TH |
3287 | int res; |
3288 | ||
3289 | if (start) | |
3290 | cmd[4] |= 1; /* START */ | |
3291 | ||
d2886ea3 SR |
3292 | if (sdp->start_stop_pwr_cond) |
3293 | cmd[4] |= start ? 1 << 4 : 3 << 4; /* Active or Standby */ | |
3294 | ||
c3c94c5a TH |
3295 | if (!scsi_device_online(sdp)) |
3296 | return -ENODEV; | |
3297 | ||
fcbfffe2 CH |
3298 | res = scsi_execute(sdp, cmd, DMA_NONE, NULL, 0, NULL, &sshdr, |
3299 | SD_TIMEOUT, SD_MAX_RETRIES, 0, RQF_PM, NULL); | |
c3c94c5a | 3300 | if (res) { |
ef61329d | 3301 | sd_print_result(sdkp, "Start/Stop Unit failed", res); |
c3c94c5a | 3302 | if (driver_byte(res) & DRIVER_SENSE) |
cc5d2c8c | 3303 | sd_print_sense_hdr(sdkp, &sshdr); |
95897910 ON |
3304 | if (scsi_sense_valid(&sshdr) && |
3305 | /* 0x3a is medium not present */ | |
3306 | sshdr.asc == 0x3a) | |
3307 | res = 0; | |
c3c94c5a TH |
3308 | } |
3309 | ||
95897910 ON |
3310 | /* SCSI error codes must not go to the generic layer */ |
3311 | if (res) | |
3312 | return -EIO; | |
3313 | ||
3314 | return 0; | |
c3c94c5a TH |
3315 | } |
3316 | ||
1da177e4 LT |
3317 | /* |
3318 | * Send a SYNCHRONIZE CACHE instruction down to the device through | |
3319 | * the normal SCSI command structure. Wait for the command to | |
3320 | * complete. | |
3321 | */ | |
3322 | static void sd_shutdown(struct device *dev) | |
3323 | { | |
3d9a1f53 | 3324 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
1da177e4 LT |
3325 | |
3326 | if (!sdkp) | |
3327 | return; /* this can happen */ | |
3328 | ||
54f57588 | 3329 | if (pm_runtime_suspended(dev)) |
3d9a1f53 | 3330 | return; |
54f57588 | 3331 | |
95897910 | 3332 | if (sdkp->WCE && sdkp->media_present) { |
e73aec82 MP |
3333 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
3334 | sd_sync_cache(sdkp); | |
39b7f1e2 | 3335 | } |
c3c94c5a | 3336 | |
cc5d2c8c JB |
3337 | if (system_state != SYSTEM_RESTART && sdkp->device->manage_start_stop) { |
3338 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); | |
3339 | sd_start_stop_device(sdkp, 0); | |
c3c94c5a | 3340 | } |
39b7f1e2 | 3341 | } |
1da177e4 | 3342 | |
95897910 | 3343 | static int sd_suspend_common(struct device *dev, bool ignore_stop_errors) |
c3c94c5a | 3344 | { |
3d9a1f53 | 3345 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
09ff92fe | 3346 | int ret = 0; |
c3c94c5a | 3347 | |
13b43891 AS |
3348 | if (!sdkp) /* E.g.: runtime suspend following sd_remove() */ |
3349 | return 0; | |
c3c94c5a | 3350 | |
95897910 | 3351 | if (sdkp->WCE && sdkp->media_present) { |
cc5d2c8c | 3352 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
c3c94c5a | 3353 | ret = sd_sync_cache(sdkp); |
95897910 ON |
3354 | if (ret) { |
3355 | /* ignore OFFLINE device */ | |
3356 | if (ret == -ENODEV) | |
3357 | ret = 0; | |
09ff92fe | 3358 | goto done; |
95897910 | 3359 | } |
c3c94c5a TH |
3360 | } |
3361 | ||
691e3d31 | 3362 | if (sdkp->device->manage_start_stop) { |
cc5d2c8c | 3363 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); |
95897910 | 3364 | /* an error is not worth aborting a system sleep */ |
cc5d2c8c | 3365 | ret = sd_start_stop_device(sdkp, 0); |
95897910 ON |
3366 | if (ignore_stop_errors) |
3367 | ret = 0; | |
c3c94c5a TH |
3368 | } |
3369 | ||
09ff92fe | 3370 | done: |
09ff92fe | 3371 | return ret; |
c3c94c5a TH |
3372 | } |
3373 | ||
95897910 ON |
3374 | static int sd_suspend_system(struct device *dev) |
3375 | { | |
3376 | return sd_suspend_common(dev, true); | |
3377 | } | |
3378 | ||
3379 | static int sd_suspend_runtime(struct device *dev) | |
3380 | { | |
3381 | return sd_suspend_common(dev, false); | |
3382 | } | |
3383 | ||
c3c94c5a TH |
3384 | static int sd_resume(struct device *dev) |
3385 | { | |
3d9a1f53 | 3386 | struct scsi_disk *sdkp = dev_get_drvdata(dev); |
c3c94c5a | 3387 | |
13b43891 AS |
3388 | if (!sdkp) /* E.g.: runtime resume at the start of sd_probe() */ |
3389 | return 0; | |
3390 | ||
cc5d2c8c | 3391 | if (!sdkp->device->manage_start_stop) |
3d9a1f53 | 3392 | return 0; |
c3c94c5a | 3393 | |
cc5d2c8c | 3394 | sd_printk(KERN_NOTICE, sdkp, "Starting disk\n"); |
3d9a1f53 | 3395 | return sd_start_stop_device(sdkp, 1); |
c3c94c5a TH |
3396 | } |
3397 | ||
1da177e4 LT |
3398 | /** |
3399 | * init_sd - entry point for this driver (both when built in or when | |
3400 | * a module). | |
3401 | * | |
3402 | * Note: this function registers this driver with the scsi mid-level. | |
3403 | **/ | |
3404 | static int __init init_sd(void) | |
3405 | { | |
5e4009ba | 3406 | int majors = 0, i, err; |
1da177e4 LT |
3407 | |
3408 | SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n")); | |
3409 | ||
0761df9c HR |
3410 | for (i = 0; i < SD_MAJORS; i++) { |
3411 | if (register_blkdev(sd_major(i), "sd") != 0) | |
3412 | continue; | |
3413 | majors++; | |
3414 | blk_register_region(sd_major(i), SD_MINORS, NULL, | |
3415 | sd_default_probe, NULL, NULL); | |
3416 | } | |
1da177e4 LT |
3417 | |
3418 | if (!majors) | |
3419 | return -ENODEV; | |
3420 | ||
5e4009ba JG |
3421 | err = class_register(&sd_disk_class); |
3422 | if (err) | |
3423 | goto err_out; | |
6bdaa1f1 | 3424 | |
4e7392ec MP |
3425 | sd_cdb_cache = kmem_cache_create("sd_ext_cdb", SD_EXT_CDB_SIZE, |
3426 | 0, 0, NULL); | |
3427 | if (!sd_cdb_cache) { | |
3428 | printk(KERN_ERR "sd: can't init extended cdb cache\n"); | |
8d964478 | 3429 | err = -ENOMEM; |
4e7392ec MP |
3430 | goto err_out_class; |
3431 | } | |
3432 | ||
3433 | sd_cdb_pool = mempool_create_slab_pool(SD_MEMPOOL_SIZE, sd_cdb_cache); | |
3434 | if (!sd_cdb_pool) { | |
3435 | printk(KERN_ERR "sd: can't init extended cdb pool\n"); | |
8d964478 | 3436 | err = -ENOMEM; |
4e7392ec MP |
3437 | goto err_out_cache; |
3438 | } | |
3439 | ||
afd5e34b JD |
3440 | err = scsi_register_driver(&sd_template.gendrv); |
3441 | if (err) | |
3442 | goto err_out_driver; | |
3443 | ||
5e4009ba JG |
3444 | return 0; |
3445 | ||
afd5e34b JD |
3446 | err_out_driver: |
3447 | mempool_destroy(sd_cdb_pool); | |
3448 | ||
4e7392ec MP |
3449 | err_out_cache: |
3450 | kmem_cache_destroy(sd_cdb_cache); | |
3451 | ||
5e4009ba JG |
3452 | err_out_class: |
3453 | class_unregister(&sd_disk_class); | |
3454 | err_out: | |
3455 | for (i = 0; i < SD_MAJORS; i++) | |
3456 | unregister_blkdev(sd_major(i), "sd"); | |
3457 | return err; | |
1da177e4 LT |
3458 | } |
3459 | ||
3460 | /** | |
3461 | * exit_sd - exit point for this driver (when it is a module). | |
3462 | * | |
3463 | * Note: this function unregisters this driver from the scsi mid-level. | |
3464 | **/ | |
3465 | static void __exit exit_sd(void) | |
3466 | { | |
3467 | int i; | |
3468 | ||
3469 | SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n")); | |
3470 | ||
afd5e34b | 3471 | scsi_unregister_driver(&sd_template.gendrv); |
4e7392ec MP |
3472 | mempool_destroy(sd_cdb_pool); |
3473 | kmem_cache_destroy(sd_cdb_cache); | |
3474 | ||
5e4009ba JG |
3475 | class_unregister(&sd_disk_class); |
3476 | ||
0761df9c HR |
3477 | for (i = 0; i < SD_MAJORS; i++) { |
3478 | blk_unregister_region(sd_major(i), SD_MINORS); | |
1da177e4 | 3479 | unregister_blkdev(sd_major(i), "sd"); |
0761df9c | 3480 | } |
1da177e4 LT |
3481 | } |
3482 | ||
1da177e4 LT |
3483 | module_init(init_sd); |
3484 | module_exit(exit_sd); | |
e73aec82 MP |
3485 | |
3486 | static void sd_print_sense_hdr(struct scsi_disk *sdkp, | |
3487 | struct scsi_sense_hdr *sshdr) | |
3488 | { | |
21045519 HR |
3489 | scsi_print_sense_hdr(sdkp->device, |
3490 | sdkp->disk ? sdkp->disk->disk_name : NULL, sshdr); | |
e73aec82 MP |
3491 | } |
3492 | ||
ef61329d HR |
3493 | static void sd_print_result(const struct scsi_disk *sdkp, const char *msg, |
3494 | int result) | |
e73aec82 | 3495 | { |
ef61329d HR |
3496 | const char *hb_string = scsi_hostbyte_string(result); |
3497 | const char *db_string = scsi_driverbyte_string(result); | |
3498 | ||
3499 | if (hb_string || db_string) | |
3500 | sd_printk(KERN_INFO, sdkp, | |
3501 | "%s: Result: hostbyte=%s driverbyte=%s\n", msg, | |
3502 | hb_string ? hb_string : "invalid", | |
3503 | db_string ? db_string : "invalid"); | |
3504 | else | |
3505 | sd_printk(KERN_INFO, sdkp, | |
3506 | "%s: Result: hostbyte=0x%02x driverbyte=0x%02x\n", | |
3507 | msg, host_byte(result), driver_byte(result)); | |
e73aec82 MP |
3508 | } |
3509 |