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sd: don't use scsi_setup_blk_pc_cmnd for flush requests
[deliverable/linux.git] / drivers / scsi / sd.c
CommitLineData
1da177e4
LT		 1/*
2 * sd.c Copyright (C) 1992 Drew Eckhardt
3 * Copyright (C) 1993, 1994, 1995, 1999 Eric Youngdale
4 *
5 * Linux scsi disk driver
6 * Initial versions: Drew Eckhardt
7 * Subsequent revisions: Eric Youngdale
8 * Modification history:
9 * - Drew Eckhardt <drew@colorado.edu> original
10 * - Eric Youngdale <eric@andante.org> add scatter-gather, multiple
11 * outstanding request, and other enhancements.
12 * Support loadable low-level scsi drivers.
13 * - Jirka Hanika <geo@ff.cuni.cz> support more scsi disks using
14 * eight major numbers.
15 * - Richard Gooch <rgooch@atnf.csiro.au> support devfs.
16 * - Torben Mathiasen <tmm@image.dk> Resource allocation fixes in
17 * sd_init and cleanups.
18 * - Alex Davis <letmein@erols.com> Fix problem where partition info
19 * not being read in sd_open. Fix problem where removable media
20 * could be ejected after sd_open.
21 * - Douglas Gilbert <dgilbert@interlog.com> cleanup for lk 2.5.x
22 * - Badari Pulavarty <pbadari@us.ibm.com>, Matthew Wilcox
23 * <willy@debian.org>, Kurt Garloff <garloff@suse.de>:
24 * Support 32k/1M disks.
25 *
26 * Logging policy (needs CONFIG_SCSI_LOGGING defined):
27 * - setting up transfer: SCSI_LOG_HLQUEUE levels 1 and 2
28 * - end of transfer (bh + scsi_lib): SCSI_LOG_HLCOMPLETE level 1
29 * - entering sd_ioctl: SCSI_LOG_IOCTL level 1
30 * - entering other commands: SCSI_LOG_HLQUEUE level 3
31 * Note: when the logging level is set by the user, it must be greater
32 * than the level indicated above to trigger output.
33 */
34
1da177e4
LT		 35#include <linux/module.h>
36#include <linux/fs.h>
37#include <linux/kernel.h>
1da177e4
LT		 38#include <linux/mm.h>
39#include <linux/bio.h>
40#include <linux/genhd.h>
41#include <linux/hdreg.h>
42#include <linux/errno.h>
43#include <linux/idr.h>
44#include <linux/interrupt.h>
45#include <linux/init.h>
46#include <linux/blkdev.h>
47#include <linux/blkpg.h>
1da177e4 48#include <linux/delay.h>
0b950672 49#include <linux/mutex.h>
7404ad3b 50#include <linux/string_helpers.h>
4ace92fc 51#include <linux/async.h>
5a0e3ad6 52#include <linux/slab.h>
54f57588 53#include <linux/pm_runtime.h>
1da177e4 54#include <asm/uaccess.h>
8f76d151 55#include <asm/unaligned.h>
1da177e4
LT		 56
57#include <scsi/scsi.h>
58#include <scsi/scsi_cmnd.h>
59#include <scsi/scsi_dbg.h>
60#include <scsi/scsi_device.h>
61#include <scsi/scsi_driver.h>
62#include <scsi/scsi_eh.h>
63#include <scsi/scsi_host.h>
64#include <scsi/scsi_ioctl.h>
1da177e4
LT		 65#include <scsi/scsicam.h>
66
aa91696e 67#include "sd.h"
a7a20d10 68#include "scsi_priv.h"
1da177e4
LT		 69#include "scsi_logging.h"
70
f018fa55
RH		 71MODULE_AUTHOR("Eric Youngdale");
72MODULE_DESCRIPTION("SCSI disk (sd) driver");
73MODULE_LICENSE("GPL");
74
75MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK0_MAJOR);
76MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK1_MAJOR);
77MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK2_MAJOR);
78MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK3_MAJOR);
79MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK4_MAJOR);
80MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK5_MAJOR);
81MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK6_MAJOR);
82MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK7_MAJOR);
83MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK8_MAJOR);
84MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK9_MAJOR);
85MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK10_MAJOR);
86MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK11_MAJOR);
87MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK12_MAJOR);
88MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK13_MAJOR);
89MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK14_MAJOR);
90MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK15_MAJOR);
d7b8bcb0
MT		 91MODULE_ALIAS_SCSI_DEVICE(TYPE_DISK);
92MODULE_ALIAS_SCSI_DEVICE(TYPE_MOD);
93MODULE_ALIAS_SCSI_DEVICE(TYPE_RBC);
f018fa55 94
870d6656 95#if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT)
f615b48c 96#define SD_MINORS 16
870d6656 97#else
3e1a7ff8 98#define SD_MINORS 0
870d6656
TH		 99#endif
100
c98a0eb0 101static void sd_config_discard(struct scsi_disk *, unsigned int);
5db44863 102static void sd_config_write_same(struct scsi_disk *);
7b3d9545 103static int sd_revalidate_disk(struct gendisk *);
72ec24bd 104static void sd_unlock_native_capacity(struct gendisk *disk);
7b3d9545
LT		 105static int sd_probe(struct device *);
106static int sd_remove(struct device *);
107static void sd_shutdown(struct device *);
95897910
ON		 108static int sd_suspend_system(struct device *);
109static int sd_suspend_runtime(struct device *);
7b3d9545
LT		 110static int sd_resume(struct device *);
111static void sd_rescan(struct device *);
a1b73fc1
CH		 112static int sd_init_command(struct scsi_cmnd *SCpnt);
113static void sd_uninit_command(struct scsi_cmnd *SCpnt);
7b3d9545 114static int sd_done(struct scsi_cmnd *);
2451079b 115static int sd_eh_action(struct scsi_cmnd *, int);
7b3d9545 116static void sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer);
ee959b00 117static void scsi_disk_release(struct device *cdev);
7b3d9545
LT		 118static void sd_print_sense_hdr(struct scsi_disk *, struct scsi_sense_hdr *);
119static void sd_print_result(struct scsi_disk *, int);
120
4034cc68 121static DEFINE_SPINLOCK(sd_index_lock);
f27bac27 122static DEFINE_IDA(sd_index_ida);
1da177e4
LT		 123
124/* This semaphore is used to mediate the 0->1 reference get in the
125 * face of object destruction (i.e. we can't allow a get on an
126 * object after last put) */
0b950672 127static DEFINE_MUTEX(sd_ref_mutex);
1da177e4 128
439d77f7
HS		 129static struct kmem_cache *sd_cdb_cache;
130static mempool_t *sd_cdb_pool;
4e7392ec 131
6bdaa1f1
JB		 132static const char *sd_cache_types[] = {
133 "write through", "none", "write back",
134 "write back, no read (daft)"
135};
136
cb2fb68d
VC		 137static void sd_set_flush_flag(struct scsi_disk *sdkp)
138{
139 unsigned flush = 0;
140
141 if (sdkp->WCE) {
142 flush |= REQ_FLUSH;
143 if (sdkp->DPOFUA)
144 flush |= REQ_FUA;
145 }
146
147 blk_queue_flush(sdkp->disk->queue, flush);
148}
149
ee959b00 150static ssize_t
e1ea2351
GKH		 151cache_type_store(struct device *dev, struct device_attribute *attr,
152 const char *buf, size_t count)
6bdaa1f1
JB		 153{
154 int i, ct = -1, rcd, wce, sp;
ee959b00 155 struct scsi_disk *sdkp = to_scsi_disk(dev);
6bdaa1f1
JB		 156 struct scsi_device *sdp = sdkp->device;
157 char buffer[64];
158 char *buffer_data;
159 struct scsi_mode_data data;
160 struct scsi_sense_hdr sshdr;
2ee3e26c 161 static const char temp[] = "temporary ";
6bdaa1f1
JB		 162 int len;
163
164 if (sdp->type != TYPE_DISK)
165 /* no cache control on RBC devices; theoretically they
166 * can do it, but there's probably so many exceptions
167 * it's not worth the risk */
168 return -EINVAL;
169
39c60a09
JB		 170 if (strncmp(buf, temp, sizeof(temp) - 1) == 0) {
171 buf += sizeof(temp) - 1;
172 sdkp->cache_override = 1;
173 } else {
174 sdkp->cache_override = 0;
175 }
176
6391a113 177 for (i = 0; i < ARRAY_SIZE(sd_cache_types); i++) {
439d77f7 178 len = strlen(sd_cache_types[i]);
6bdaa1f1
JB		 179 if (strncmp(sd_cache_types[i], buf, len) == 0 &&
180 buf[len] == '\n') {
181 ct = i;
182 break;
183 }
184 }
185 if (ct < 0)
186 return -EINVAL;
187 rcd = ct & 0x01 ? 1 : 0;
188 wce = ct & 0x02 ? 1 : 0;
39c60a09
JB		 189
190 if (sdkp->cache_override) {
191 sdkp->WCE = wce;
192 sdkp->RCD = rcd;
cb2fb68d 193 sd_set_flush_flag(sdkp);
39c60a09
JB		 194 return count;
195 }
196
6bdaa1f1
JB		 197 if (scsi_mode_sense(sdp, 0x08, 8, buffer, sizeof(buffer), SD_TIMEOUT,
198 SD_MAX_RETRIES, &data, NULL))
199 return -EINVAL;
a9312fb8 200 len = min_t(size_t, sizeof(buffer), data.length - data.header_length -
6bdaa1f1
JB		 201 data.block_descriptor_length);
202 buffer_data = buffer + data.header_length +
203 data.block_descriptor_length;
204 buffer_data[2] &= ~0x05;
205 buffer_data[2] |= wce << 2 | rcd;
206 sp = buffer_data[0] & 0x80 ? 1 : 0;
207
208 if (scsi_mode_select(sdp, 1, sp, 8, buffer_data, len, SD_TIMEOUT,
209 SD_MAX_RETRIES, &data, &sshdr)) {
210 if (scsi_sense_valid(&sshdr))
e73aec82 211 sd_print_sense_hdr(sdkp, &sshdr);
6bdaa1f1
JB		 212 return -EINVAL;
213 }
f98a8cae 214 revalidate_disk(sdkp->disk);
6bdaa1f1
JB		 215 return count;
216}
217
ee959b00 218static ssize_t
e1ea2351
GKH		 219manage_start_stop_show(struct device *dev, struct device_attribute *attr,
220 char *buf)
221{
222 struct scsi_disk *sdkp = to_scsi_disk(dev);
223 struct scsi_device *sdp = sdkp->device;
224
225 return snprintf(buf, 20, "%u\n", sdp->manage_start_stop);
226}
227
228static ssize_t
229manage_start_stop_store(struct device *dev, struct device_attribute *attr,
230 const char *buf, size_t count)
c3c94c5a 231{
ee959b00 232 struct scsi_disk *sdkp = to_scsi_disk(dev);
c3c94c5a
TH		 233 struct scsi_device *sdp = sdkp->device;
234
235 if (!capable(CAP_SYS_ADMIN))
236 return -EACCES;
237
238 sdp->manage_start_stop = simple_strtoul(buf, NULL, 10);
239
240 return count;
241}
e1ea2351 242static DEVICE_ATTR_RW(manage_start_stop);
c3c94c5a 243
ee959b00 244static ssize_t
e1ea2351
GKH		 245allow_restart_show(struct device *dev, struct device_attribute *attr, char *buf)
246{
247 struct scsi_disk *sdkp = to_scsi_disk(dev);
248
249 return snprintf(buf, 40, "%d\n", sdkp->device->allow_restart);
250}
251
252static ssize_t
253allow_restart_store(struct device *dev, struct device_attribute *attr,
254 const char *buf, size_t count)
a144c5ae 255{
ee959b00 256 struct scsi_disk *sdkp = to_scsi_disk(dev);
a144c5ae
BK		 257 struct scsi_device *sdp = sdkp->device;
258
259 if (!capable(CAP_SYS_ADMIN))
260 return -EACCES;
261
262 if (sdp->type != TYPE_DISK)
263 return -EINVAL;
264
265 sdp->allow_restart = simple_strtoul(buf, NULL, 10);
266
267 return count;
268}
e1ea2351 269static DEVICE_ATTR_RW(allow_restart);
a144c5ae 270
ee959b00 271static ssize_t
e1ea2351 272cache_type_show(struct device *dev, struct device_attribute *attr, char *buf)
6bdaa1f1 273{
ee959b00 274 struct scsi_disk *sdkp = to_scsi_disk(dev);
6bdaa1f1
JB		 275 int ct = sdkp->RCD + 2*sdkp->WCE;
276
277 return snprintf(buf, 40, "%s\n", sd_cache_types[ct]);
278}
e1ea2351 279static DEVICE_ATTR_RW(cache_type);
6bdaa1f1 280
ee959b00 281static ssize_t
e1ea2351 282FUA_show(struct device *dev, struct device_attribute *attr, char *buf)
6bdaa1f1 283{
ee959b00 284 struct scsi_disk *sdkp = to_scsi_disk(dev);
6bdaa1f1
JB		 285
286 return snprintf(buf, 20, "%u\n", sdkp->DPOFUA);
287}
e1ea2351 288static DEVICE_ATTR_RO(FUA);
6bdaa1f1 289
ee959b00 290static ssize_t
e1ea2351
GKH		 291protection_type_show(struct device *dev, struct device_attribute *attr,
292 char *buf)
e0597d70
MP		 293{
294 struct scsi_disk *sdkp = to_scsi_disk(dev);
295
296 return snprintf(buf, 20, "%u\n", sdkp->protection_type);
297}
298
8172499a 299static ssize_t
e1ea2351
GKH		 300protection_type_store(struct device *dev, struct device_attribute *attr,
301 const char *buf, size_t count)
8172499a
MP		 302{
303 struct scsi_disk *sdkp = to_scsi_disk(dev);
304 unsigned int val;
305 int err;
306
307 if (!capable(CAP_SYS_ADMIN))
308 return -EACCES;
309
310 err = kstrtouint(buf, 10, &val);
311
312 if (err)
313 return err;
314
315 if (val >= 0 && val <= SD_DIF_TYPE3_PROTECTION)
316 sdkp->protection_type = val;
317
318 return count;
319}
e1ea2351 320static DEVICE_ATTR_RW(protection_type);
8172499a 321
518fa8e3 322static ssize_t
e1ea2351
GKH		 323protection_mode_show(struct device *dev, struct device_attribute *attr,
324 char *buf)
518fa8e3
MP		 325{
326 struct scsi_disk *sdkp = to_scsi_disk(dev);
327 struct scsi_device *sdp = sdkp->device;
328 unsigned int dif, dix;
329
330 dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type);
331 dix = scsi_host_dix_capable(sdp->host, sdkp->protection_type);
332
333 if (!dix && scsi_host_dix_capable(sdp->host, SD_DIF_TYPE0_PROTECTION)) {
334 dif = 0;
335 dix = 1;
336 }
337
338 if (!dif && !dix)
339 return snprintf(buf, 20, "none\n");
340
341 return snprintf(buf, 20, "%s%u\n", dix ? "dix" : "dif", dif);
342}
e1ea2351 343static DEVICE_ATTR_RO(protection_mode);
518fa8e3 344
e0597d70 345static ssize_t
e1ea2351 346app_tag_own_show(struct device *dev, struct device_attribute *attr, char *buf)
e0597d70
MP		 347{
348 struct scsi_disk *sdkp = to_scsi_disk(dev);
349
350 return snprintf(buf, 20, "%u\n", sdkp->ATO);
351}
e1ea2351 352static DEVICE_ATTR_RO(app_tag_own);
e0597d70 353
e339c1a7 354static ssize_t
e1ea2351
GKH		 355thin_provisioning_show(struct device *dev, struct device_attribute *attr,
356 char *buf)
e339c1a7
MP		 357{
358 struct scsi_disk *sdkp = to_scsi_disk(dev);
359
c98a0eb0
MP		 360 return snprintf(buf, 20, "%u\n", sdkp->lbpme);
361}
e1ea2351 362static DEVICE_ATTR_RO(thin_provisioning);
c98a0eb0
MP		 363
364static const char *lbp_mode[] = {
365 [SD_LBP_FULL] = "full",
366 [SD_LBP_UNMAP] = "unmap",
367 [SD_LBP_WS16] = "writesame_16",
368 [SD_LBP_WS10] = "writesame_10",
369 [SD_LBP_ZERO] = "writesame_zero",
370 [SD_LBP_DISABLE] = "disabled",
371};
372
373static ssize_t
e1ea2351
GKH		 374provisioning_mode_show(struct device *dev, struct device_attribute *attr,
375 char *buf)
c98a0eb0
MP		 376{
377 struct scsi_disk *sdkp = to_scsi_disk(dev);
378
379 return snprintf(buf, 20, "%s\n", lbp_mode[sdkp->provisioning_mode]);
380}
381
382static ssize_t
e1ea2351
GKH		 383provisioning_mode_store(struct device *dev, struct device_attribute *attr,
384 const char *buf, size_t count)
c98a0eb0
MP		 385{
386 struct scsi_disk *sdkp = to_scsi_disk(dev);
387 struct scsi_device *sdp = sdkp->device;
388
389 if (!capable(CAP_SYS_ADMIN))
390 return -EACCES;
391
392 if (sdp->type != TYPE_DISK)
393 return -EINVAL;
394
395 if (!strncmp(buf, lbp_mode[SD_LBP_UNMAP], 20))
396 sd_config_discard(sdkp, SD_LBP_UNMAP);
397 else if (!strncmp(buf, lbp_mode[SD_LBP_WS16], 20))
398 sd_config_discard(sdkp, SD_LBP_WS16);
399 else if (!strncmp(buf, lbp_mode[SD_LBP_WS10], 20))
400 sd_config_discard(sdkp, SD_LBP_WS10);
401 else if (!strncmp(buf, lbp_mode[SD_LBP_ZERO], 20))
402 sd_config_discard(sdkp, SD_LBP_ZERO);
403 else if (!strncmp(buf, lbp_mode[SD_LBP_DISABLE], 20))
404 sd_config_discard(sdkp, SD_LBP_DISABLE);
405 else
406 return -EINVAL;
407
408 return count;
e339c1a7 409}
e1ea2351 410static DEVICE_ATTR_RW(provisioning_mode);
e339c1a7 411
18a4d0a2 412static ssize_t
e1ea2351
GKH		 413max_medium_access_timeouts_show(struct device *dev,
414 struct device_attribute *attr, char *buf)
18a4d0a2
MP		 415{
416 struct scsi_disk *sdkp = to_scsi_disk(dev);
417
418 return snprintf(buf, 20, "%u\n", sdkp->max_medium_access_timeouts);
419}
420
421static ssize_t
e1ea2351
GKH		 422max_medium_access_timeouts_store(struct device *dev,
423 struct device_attribute *attr, const char *buf,
424 size_t count)
18a4d0a2
MP		 425{
426 struct scsi_disk *sdkp = to_scsi_disk(dev);
427 int err;
428
429 if (!capable(CAP_SYS_ADMIN))
430 return -EACCES;
431
432 err = kstrtouint(buf, 10, &sdkp->max_medium_access_timeouts);
433
434 return err ? err : count;
435}
e1ea2351 436static DEVICE_ATTR_RW(max_medium_access_timeouts);
18a4d0a2 437
5db44863 438static ssize_t
e1ea2351
GKH		 439max_write_same_blocks_show(struct device *dev, struct device_attribute *attr,
440 char *buf)
5db44863
MP		 441{
442 struct scsi_disk *sdkp = to_scsi_disk(dev);
443
444 return snprintf(buf, 20, "%u\n", sdkp->max_ws_blocks);
445}
446
447static ssize_t
e1ea2351
GKH		 448max_write_same_blocks_store(struct device *dev, struct device_attribute *attr,
449 const char *buf, size_t count)
5db44863
MP		 450{
451 struct scsi_disk *sdkp = to_scsi_disk(dev);
452 struct scsi_device *sdp = sdkp->device;
453 unsigned long max;
454 int err;
455
456 if (!capable(CAP_SYS_ADMIN))
457 return -EACCES;
458
459 if (sdp->type != TYPE_DISK)
460 return -EINVAL;
461
462 err = kstrtoul(buf, 10, &max);
463
464 if (err)
465 return err;
466
467 if (max == 0)
468 sdp->no_write_same = 1;
66c28f97
MP		 469 else if (max <= SD_MAX_WS16_BLOCKS) {
470 sdp->no_write_same = 0;
5db44863 471 sdkp->max_ws_blocks = max;
66c28f97 472 }
5db44863
MP		 473
474 sd_config_write_same(sdkp);
475
476 return count;
477}
e1ea2351
GKH		 478static DEVICE_ATTR_RW(max_write_same_blocks);
479
480static struct attribute *sd_disk_attrs[] = {
481 &dev_attr_cache_type.attr,
482 &dev_attr_FUA.attr,
483 &dev_attr_allow_restart.attr,
484 &dev_attr_manage_start_stop.attr,
485 &dev_attr_protection_type.attr,
486 &dev_attr_protection_mode.attr,
487 &dev_attr_app_tag_own.attr,
488 &dev_attr_thin_provisioning.attr,
489 &dev_attr_provisioning_mode.attr,
490 &dev_attr_max_write_same_blocks.attr,
491 &dev_attr_max_medium_access_timeouts.attr,
492 NULL,
6bdaa1f1 493};
e1ea2351 494ATTRIBUTE_GROUPS(sd_disk);
6bdaa1f1
JB		 495
496static struct class sd_disk_class = {
497 .name = "scsi_disk",
498 .owner = THIS_MODULE,
ee959b00 499 .dev_release = scsi_disk_release,
e1ea2351 500 .dev_groups = sd_disk_groups,
6bdaa1f1 501};
1da177e4 502
691e3d31 503static const struct dev_pm_ops sd_pm_ops = {
95897910 504 .suspend = sd_suspend_system,
691e3d31 505 .resume = sd_resume,
95897910 506 .poweroff = sd_suspend_system,
691e3d31 507 .restore = sd_resume,
95897910 508 .runtime_suspend = sd_suspend_runtime,
691e3d31
AL		 509 .runtime_resume = sd_resume,
510};
511
1da177e4
LT		 512static struct scsi_driver sd_template = {
513 .owner = THIS_MODULE,
514 .gendrv = {
515 .name = "sd",
516 .probe = sd_probe,
517 .remove = sd_remove,
518 .shutdown = sd_shutdown,
691e3d31 519 .pm = &sd_pm_ops,
1da177e4
LT		 520 },
521 .rescan = sd_rescan,
a1b73fc1
CH		 522 .init_command = sd_init_command,
523 .uninit_command = sd_uninit_command,
7b3d9545 524 .done = sd_done,
18a4d0a2 525 .eh_action = sd_eh_action,
1da177e4
LT		 526};
527
0761df9c
HR		 528/*
529 * Dummy kobj_map->probe function.
530 * The default ->probe function will call modprobe, which is
531 * pointless as this module is already loaded.
532 */
533static struct kobject *sd_default_probe(dev_t devt, int *partno, void *data)
534{
535 return NULL;
536}
537
1da177e4
LT		 538/*
539 * Device no to disk mapping:
540 *
541 * major disc2 disc p1
542 * |............|.............|....|....| <- dev_t
543 * 31 20 19 8 7 4 3 0
544 *
545 * Inside a major, we have 16k disks, however mapped non-
546 * contiguously. The first 16 disks are for major0, the next
547 * ones with major1, ... Disk 256 is for major0 again, disk 272
548 * for major1, ...
549 * As we stay compatible with our numbering scheme, we can reuse
550 * the well-know SCSI majors 8, 65--71, 136--143.
551 */
552static int sd_major(int major_idx)
553{
554 switch (major_idx) {
555 case 0:
556 return SCSI_DISK0_MAJOR;
557 case 1 ... 7:
558 return SCSI_DISK1_MAJOR + major_idx - 1;
559 case 8 ... 15:
560 return SCSI_DISK8_MAJOR + major_idx - 8;
561 default:
562 BUG();
563 return 0; /* shut up gcc */
564 }
565}
566
39b7f1e2 567static struct scsi_disk *__scsi_disk_get(struct gendisk *disk)
1da177e4
LT		 568{
569 struct scsi_disk *sdkp = NULL;
570
39b7f1e2
AS		 571 if (disk->private_data) {
572 sdkp = scsi_disk(disk);
573 if (scsi_device_get(sdkp->device) == 0)
ee959b00 574 get_device(&sdkp->dev);
39b7f1e2
AS		 575 else
576 sdkp = NULL;
577 }
578 return sdkp;
579}
580
581static struct scsi_disk *scsi_disk_get(struct gendisk *disk)
582{
583 struct scsi_disk *sdkp;
584
0b950672 585 mutex_lock(&sd_ref_mutex);
39b7f1e2 586 sdkp = __scsi_disk_get(disk);
0b950672 587 mutex_unlock(&sd_ref_mutex);
1da177e4 588 return sdkp;
39b7f1e2 589}
1da177e4 590
39b7f1e2
AS		 591static struct scsi_disk *scsi_disk_get_from_dev(struct device *dev)
592{
593 struct scsi_disk *sdkp;
594
0b950672 595 mutex_lock(&sd_ref_mutex);
39b7f1e2
AS		 596 sdkp = dev_get_drvdata(dev);
597 if (sdkp)
598 sdkp = __scsi_disk_get(sdkp->disk);
0b950672 599 mutex_unlock(&sd_ref_mutex);
1da177e4
LT		 600 return sdkp;
601}
602
603static void scsi_disk_put(struct scsi_disk *sdkp)
604{
605 struct scsi_device *sdev = sdkp->device;
606
0b950672 607 mutex_lock(&sd_ref_mutex);
ee959b00 608 put_device(&sdkp->dev);
1da177e4 609 scsi_device_put(sdev);
0b950672 610 mutex_unlock(&sd_ref_mutex);
1da177e4
LT		 611}
612
35e1a5d9
MP		 613static void sd_prot_op(struct scsi_cmnd *scmd, unsigned int dif)
614{
615 unsigned int prot_op = SCSI_PROT_NORMAL;
616 unsigned int dix = scsi_prot_sg_count(scmd);
617
618 if (scmd->sc_data_direction == DMA_FROM_DEVICE) {
619 if (dif && dix)
620 prot_op = SCSI_PROT_READ_PASS;
621 else if (dif && !dix)
622 prot_op = SCSI_PROT_READ_STRIP;
623 else if (!dif && dix)
624 prot_op = SCSI_PROT_READ_INSERT;
625 } else {
626 if (dif && dix)
627 prot_op = SCSI_PROT_WRITE_PASS;
628 else if (dif && !dix)
629 prot_op = SCSI_PROT_WRITE_INSERT;
630 else if (!dif && dix)
631 prot_op = SCSI_PROT_WRITE_STRIP;
632 }
633
634 scsi_set_prot_op(scmd, prot_op);
635 scsi_set_prot_type(scmd, dif);
636}
637
c98a0eb0
MP		 638static void sd_config_discard(struct scsi_disk *sdkp, unsigned int mode)
639{
640 struct request_queue *q = sdkp->disk->queue;
641 unsigned int logical_block_size = sdkp->device->sector_size;
642 unsigned int max_blocks = 0;
643
644 q->limits.discard_zeroes_data = sdkp->lbprz;
2a8cfad0
MP		 645 q->limits.discard_alignment = sdkp->unmap_alignment *
646 logical_block_size;
c98a0eb0
MP		 647 q->limits.discard_granularity =
648 max(sdkp->physical_block_size,
649 sdkp->unmap_granularity * logical_block_size);
650
89730393
MP		 651 sdkp->provisioning_mode = mode;
652
c98a0eb0
MP		 653 switch (mode) {
654
655 case SD_LBP_DISABLE:
656 q->limits.max_discard_sectors = 0;
657 queue_flag_clear_unlocked(QUEUE_FLAG_DISCARD, q);
658 return;
659
660 case SD_LBP_UNMAP:
5db44863
MP		 661 max_blocks = min_not_zero(sdkp->max_unmap_blocks,
662 (u32)SD_MAX_WS16_BLOCKS);
c98a0eb0
MP		 663 break;
664
665 case SD_LBP_WS16:
5db44863
MP		 666 max_blocks = min_not_zero(sdkp->max_ws_blocks,
667 (u32)SD_MAX_WS16_BLOCKS);
c98a0eb0
MP		 668 break;
669
670 case SD_LBP_WS10:
5db44863
MP		 671 max_blocks = min_not_zero(sdkp->max_ws_blocks,
672 (u32)SD_MAX_WS10_BLOCKS);
c98a0eb0
MP		 673 break;
674
675 case SD_LBP_ZERO:
5db44863
MP		 676 max_blocks = min_not_zero(sdkp->max_ws_blocks,
677 (u32)SD_MAX_WS10_BLOCKS);
c98a0eb0
MP		 678 q->limits.discard_zeroes_data = 1;
679 break;
680 }
681
682 q->limits.max_discard_sectors = max_blocks * (logical_block_size >> 9);
683 queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, q);
c98a0eb0
MP		 684}
685
e339c1a7 686/**
26e85fcd 687 * sd_setup_discard_cmnd - unmap blocks on thinly provisioned device
66ac0280 688 * @sdp: scsi device to operate one
e339c1a7
MP		 689 * @rq: Request to prepare
690 *
691 * Will issue either UNMAP or WRITE SAME(16) depending on preference
692 * indicated by target device.
693 **/
26e85fcd 694static int sd_setup_discard_cmnd(struct scsi_device *sdp, struct request *rq)
e339c1a7
MP		 695{
696 struct scsi_disk *sdkp = scsi_disk(rq->rq_disk);
26e85fcd
MP		 697 sector_t sector = blk_rq_pos(rq);
698 unsigned int nr_sectors = blk_rq_sectors(rq);
699 unsigned int nr_bytes = blk_rq_bytes(rq);
66ac0280 700 unsigned int len;
f1126e95 701 int ret;
c98a0eb0 702 char *buf;
66ac0280 703 struct page *page;
e339c1a7 704
26e85fcd
MP		 705 sector >>= ilog2(sdp->sector_size) - 9;
706 nr_sectors >>= ilog2(sdp->sector_size) - 9;
e339c1a7
MP		 707 rq->timeout = SD_TIMEOUT;
708
709 memset(rq->cmd, 0, rq->cmd_len);
710
66ac0280
CH		 711 page = alloc_page(GFP_ATOMIC | __GFP_ZERO);
712 if (!page)
713 return BLKPREP_DEFER;
714
c98a0eb0
MP		 715 switch (sdkp->provisioning_mode) {
716 case SD_LBP_UNMAP:
717 buf = page_address(page);
e339c1a7 718
66ac0280 719 rq->cmd_len = 10;
e339c1a7
MP		 720 rq->cmd[0] = UNMAP;
721 rq->cmd[8] = 24;
e339c1a7
MP		 722
723 put_unaligned_be16(6 + 16, &buf[0]);
724 put_unaligned_be16(16, &buf[2]);
725 put_unaligned_be64(sector, &buf[8]);
66ac0280 726 put_unaligned_be32(nr_sectors, &buf[16]);
e339c1a7 727
66ac0280 728 len = 24;
c98a0eb0
MP		 729 break;
730
731 case SD_LBP_WS16:
66ac0280 732 rq->cmd_len = 16;
e339c1a7
MP		 733 rq->cmd[0] = WRITE_SAME_16;
734 rq->cmd[1] = 0x8; /* UNMAP */
735 put_unaligned_be64(sector, &rq->cmd[2]);
66ac0280
CH		 736 put_unaligned_be32(nr_sectors, &rq->cmd[10]);
737
738 len = sdkp->device->sector_size;
c98a0eb0
MP		 739 break;
740
741 case SD_LBP_WS10:
742 case SD_LBP_ZERO:
743 rq->cmd_len = 10;
744 rq->cmd[0] = WRITE_SAME;
745 if (sdkp->provisioning_mode == SD_LBP_WS10)
746 rq->cmd[1] = 0x8; /* UNMAP */
747 put_unaligned_be32(sector, &rq->cmd[2]);
748 put_unaligned_be16(nr_sectors, &rq->cmd[7]);
749
750 len = sdkp->device->sector_size;
751 break;
752
753 default:
09b9cc44 754 ret = BLKPREP_KILL;
c98a0eb0 755 goto out;
e339c1a7
MP		 756 }
757
dc4a9307 758 rq->completion_data = page;
66ac0280 759 blk_add_request_payload(rq, page, len);
f1126e95 760 ret = scsi_setup_blk_pc_cmnd(sdp, rq);
26e85fcd 761 rq->__data_len = nr_bytes;
c98a0eb0
MP		 762
763out:
b4f42e28 764 if (ret != BLKPREP_OK)
610a6349 765 __free_page(page);
f1126e95
FT		 766 return ret;
767}
768
5db44863
MP		 769static void sd_config_write_same(struct scsi_disk *sdkp)
770{
771 struct request_queue *q = sdkp->disk->queue;
772 unsigned int logical_block_size = sdkp->device->sector_size;
5db44863
MP		 773
774 if (sdkp->device->no_write_same) {
775 sdkp->max_ws_blocks = 0;
776 goto out;
777 }
778
779 /* Some devices can not handle block counts above 0xffff despite
780 * supporting WRITE SAME(16). Consequently we default to 64k
781 * blocks per I/O unless the device explicitly advertises a
782 * bigger limit.
783 */
66c28f97
MP		 784 if (sdkp->max_ws_blocks > SD_MAX_WS10_BLOCKS)
785 sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks,
786 (u32)SD_MAX_WS16_BLOCKS);
787 else if (sdkp->ws16 || sdkp->ws10 || sdkp->device->no_report_opcodes)
788 sdkp->max_ws_blocks = min_not_zero(sdkp->max_ws_blocks,
789 (u32)SD_MAX_WS10_BLOCKS);
790 else {
791 sdkp->device->no_write_same = 1;
792 sdkp->max_ws_blocks = 0;
793 }
5db44863
MP		 794
795out:
66c28f97
MP		 796 blk_queue_max_write_same_sectors(q, sdkp->max_ws_blocks *
797 (logical_block_size >> 9));
5db44863
MP		 798}
799
800/**
801 * sd_setup_write_same_cmnd - write the same data to multiple blocks
802 * @sdp: scsi device to operate one
803 * @rq: Request to prepare
804 *
805 * Will issue either WRITE SAME(10) or WRITE SAME(16) depending on
806 * preference indicated by target device.
807 **/
808static int sd_setup_write_same_cmnd(struct scsi_device *sdp, struct request *rq)
809{
810 struct scsi_disk *sdkp = scsi_disk(rq->rq_disk);
811 struct bio *bio = rq->bio;
812 sector_t sector = blk_rq_pos(rq);
813 unsigned int nr_sectors = blk_rq_sectors(rq);
814 unsigned int nr_bytes = blk_rq_bytes(rq);
815 int ret;
816
817 if (sdkp->device->no_write_same)
818 return BLKPREP_KILL;
819
a4ad39b1 820 BUG_ON(bio_offset(bio) || bio_iovec(bio).bv_len != sdp->sector_size);
5db44863
MP		 821
822 sector >>= ilog2(sdp->sector_size) - 9;
823 nr_sectors >>= ilog2(sdp->sector_size) - 9;
824
825 rq->__data_len = sdp->sector_size;
826 rq->timeout = SD_WRITE_SAME_TIMEOUT;
827 memset(rq->cmd, 0, rq->cmd_len);
828
829 if (sdkp->ws16 || sector > 0xffffffff || nr_sectors > 0xffff) {
830 rq->cmd_len = 16;
831 rq->cmd[0] = WRITE_SAME_16;
832 put_unaligned_be64(sector, &rq->cmd[2]);
833 put_unaligned_be32(nr_sectors, &rq->cmd[10]);
834 } else {
835 rq->cmd_len = 10;
836 rq->cmd[0] = WRITE_SAME;
837 put_unaligned_be32(sector, &rq->cmd[2]);
838 put_unaligned_be16(nr_sectors, &rq->cmd[7]);
839 }
840
841 ret = scsi_setup_blk_pc_cmnd(sdp, rq);
842 rq->__data_len = nr_bytes;
843
844 return ret;
845}
846
a118c6c1 847static int sd_setup_flush_cmnd(struct scsi_cmnd *cmd)
90467c29 848{
a118c6c1
CH		 849 struct request *rq = cmd->request;
850
851 /* flush requests don't perform I/O, zero the S/G table */
852 memset(&cmd->sdb, 0, sizeof(cmd->sdb));
90467c29 853
a118c6c1
CH		 854 cmd->cmnd[0] = SYNCHRONIZE_CACHE;
855 cmd->cmd_len = 10;
856 cmd->transfersize = 0;
857 cmd->allowed = SD_MAX_RETRIES;
858
859 rq->timeout *= SD_FLUSH_TIMEOUT_MULTIPLIER;
860 return BLKPREP_OK;
90467c29
FT		 861}
862
a1b73fc1 863static void sd_uninit_command(struct scsi_cmnd *SCpnt)
f1126e95 864{
a1b73fc1 865 struct request *rq = SCpnt->request;
085b513f 866
dc4a9307
JA		 867 if (rq->cmd_flags & REQ_DISCARD)
868 __free_page(rq->completion_data);
b4f42e28 869
085b513f
EM		 870 if (SCpnt->cmnd != rq->cmd) {
871 mempool_free(SCpnt->cmnd, sd_cdb_pool);
872 SCpnt->cmnd = NULL;
873 SCpnt->cmd_len = 0;
874 }
e339c1a7
MP		 875}
876
a1b73fc1 877static int sd_init_command(struct scsi_cmnd *SCpnt)
1da177e4 878{
a1b73fc1
CH		 879 struct request *rq = SCpnt->request;
880 struct scsi_device *sdp = SCpnt->device;
776b23a0 881 struct gendisk *disk = rq->rq_disk;
af55ff67 882 struct scsi_disk *sdkp;
83096ebf 883 sector_t block = blk_rq_pos(rq);
18351070 884 sector_t threshold;
83096ebf 885 unsigned int this_count = blk_rq_sectors(rq);
bd623e79 886 int ret, host_dif;
4e7392ec 887 unsigned char protect;
7f9a6bc4 888
e339c1a7
MP		 889 /*
890 * Discard request come in as REQ_TYPE_FS but we turn them into
891 * block PC requests to make life easier.
892 */
66ac0280 893 if (rq->cmd_flags & REQ_DISCARD) {
26e85fcd 894 ret = sd_setup_discard_cmnd(sdp, rq);
66ac0280 895 goto out;
5db44863
MP		 896 } else if (rq->cmd_flags & REQ_WRITE_SAME) {
897 ret = sd_setup_write_same_cmnd(sdp, rq);
898 goto out;
90467c29 899 } else if (rq->cmd_flags & REQ_FLUSH) {
a118c6c1 900 ret = sd_setup_flush_cmnd(SCpnt);
90467c29 901 goto out;
7f9a6bc4 902 }
3868cf8e 903 ret = scsi_init_io(SCpnt, GFP_ATOMIC);
7f9a6bc4
JB		 904 if (ret != BLKPREP_OK)
905 goto out;
906 SCpnt = rq->special;
af55ff67 907 sdkp = scsi_disk(disk);
7f9a6bc4
JB		 908
909 /* from here on until we're complete, any goto out
910 * is used for a killable error condition */
911 ret = BLKPREP_KILL;
1da177e4 912
a1b73fc1
CH		 913 SCSI_LOG_HLQUEUE(1,
914 scmd_printk(KERN_INFO, SCpnt,
915 "%s: block=%llu, count=%d\n",
916 __func__, (unsigned long long)block, this_count));
1da177e4
LT		 917
918 if (!sdp || !scsi_device_online(sdp) ||
83096ebf 919 block + blk_rq_sectors(rq) > get_capacity(disk)) {
fa0d34be 920 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt,
83096ebf
TH		 921 "Finishing %u sectors\n",
922 blk_rq_sectors(rq)));
fa0d34be
MP		 923 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt,
924 "Retry with 0x%p\n", SCpnt));
7f9a6bc4 925 goto out;
1da177e4
LT		 926 }
927
928 if (sdp->changed) {
929 /*
930 * quietly refuse to do anything to a changed disc until
931 * the changed bit has been reset
932 */
3ff5588d 933 /* printk("SCSI disk has been changed or is not present. Prohibiting further I/O.\n"); */
7f9a6bc4 934 goto out;
1da177e4 935 }
7f9a6bc4 936
a0899d4d 937 /*
18351070
LT		 938 * Some SD card readers can't handle multi-sector accesses which touch
939 * the last one or two hardware sectors. Split accesses as needed.
a0899d4d 940 */
18351070
LT		 941 threshold = get_capacity(disk) - SD_LAST_BUGGY_SECTORS *
942 (sdp->sector_size / 512);
943
944 if (unlikely(sdp->last_sector_bug && block + this_count > threshold)) {
945 if (block < threshold) {
946 /* Access up to the threshold but not beyond */
947 this_count = threshold - block;
948 } else {
949 /* Access only a single hardware sector */
950 this_count = sdp->sector_size / 512;
951 }
952 }
a0899d4d 953
fa0d34be
MP		 954 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, "block=%llu\n",
955 (unsigned long long)block));
1da177e4
LT		 956
957 /*
958 * If we have a 1K hardware sectorsize, prevent access to single
959 * 512 byte sectors. In theory we could handle this - in fact
960 * the scsi cdrom driver must be able to handle this because
961 * we typically use 1K blocksizes, and cdroms typically have
962 * 2K hardware sectorsizes. Of course, things are simpler
963 * with the cdrom, since it is read-only. For performance
964 * reasons, the filesystems should be able to handle this
965 * and not force the scsi disk driver to use bounce buffers
966 * for this.
967 */
968 if (sdp->sector_size == 1024) {
83096ebf 969 if ((block & 1) || (blk_rq_sectors(rq) & 1)) {
e73aec82
MP		 970 scmd_printk(KERN_ERR, SCpnt,
971 "Bad block number requested\n");
7f9a6bc4 972 goto out;
1da177e4
LT		 973 } else {
974 block = block >> 1;
975 this_count = this_count >> 1;
976 }
977 }
978 if (sdp->sector_size == 2048) {
83096ebf 979 if ((block & 3) || (blk_rq_sectors(rq) & 3)) {
e73aec82
MP		 980 scmd_printk(KERN_ERR, SCpnt,
981 "Bad block number requested\n");
7f9a6bc4 982 goto out;
1da177e4
LT		 983 } else {
984 block = block >> 2;
985 this_count = this_count >> 2;
986 }
987 }
988 if (sdp->sector_size == 4096) {
83096ebf 989 if ((block & 7) || (blk_rq_sectors(rq) & 7)) {
e73aec82
MP		 990 scmd_printk(KERN_ERR, SCpnt,
991 "Bad block number requested\n");
7f9a6bc4 992 goto out;
1da177e4
LT		 993 } else {
994 block = block >> 3;
995 this_count = this_count >> 3;
996 }
997 }
998 if (rq_data_dir(rq) == WRITE) {
999 if (!sdp->writeable) {
7f9a6bc4 1000 goto out;
1da177e4
LT		 1001 }
1002 SCpnt->cmnd[0] = WRITE_6;
af55ff67 1003
8c579ab6
MP		 1004 if (blk_integrity_rq(rq))
1005 sd_dif_prepare(rq, block, sdp->sector_size);
af55ff67 1006
1da177e4
LT		 1007 } else if (rq_data_dir(rq) == READ) {
1008 SCpnt->cmnd[0] = READ_6;
1da177e4 1009 } else {
5953316d 1010 scmd_printk(KERN_ERR, SCpnt, "Unknown command %llx\n", (unsigned long long) rq->cmd_flags);
7f9a6bc4 1011 goto out;
1da177e4
LT		 1012 }
1013
fa0d34be 1014 SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt,
83096ebf 1015 "%s %d/%u 512 byte blocks.\n",
fa0d34be
MP		 1016 (rq_data_dir(rq) == WRITE) ?
1017 "writing" : "reading", this_count,
83096ebf 1018 blk_rq_sectors(rq)));
1da177e4 1019
af55ff67 1020 /* Set RDPROTECT/WRPROTECT if disk is formatted with DIF */
bd623e79
MP		 1021 host_dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type);
1022 if (host_dif)
4e7392ec 1023 protect = 1 << 5;
af55ff67 1024 else
4e7392ec
MP		 1025 protect = 0;
1026
1027 if (host_dif == SD_DIF_TYPE2_PROTECTION) {
1028 SCpnt->cmnd = mempool_alloc(sd_cdb_pool, GFP_ATOMIC);
1029
1030 if (unlikely(SCpnt->cmnd == NULL)) {
1031 ret = BLKPREP_DEFER;
1032 goto out;
1033 }
af55ff67 1034
4e7392ec
MP		 1035 SCpnt->cmd_len = SD_EXT_CDB_SIZE;
1036 memset(SCpnt->cmnd, 0, SCpnt->cmd_len);
1037 SCpnt->cmnd[0] = VARIABLE_LENGTH_CMD;
1038 SCpnt->cmnd[7] = 0x18;
1039 SCpnt->cmnd[9] = (rq_data_dir(rq) == READ) ? READ_32 : WRITE_32;
33659ebb 1040 SCpnt->cmnd[10] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0);
4e7392ec
MP		 1041
1042 /* LBA */
1043 SCpnt->cmnd[12] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0;
1044 SCpnt->cmnd[13] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0;
1045 SCpnt->cmnd[14] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0;
1046 SCpnt->cmnd[15] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0;
1047 SCpnt->cmnd[16] = (unsigned char) (block >> 24) & 0xff;
1048 SCpnt->cmnd[17] = (unsigned char) (block >> 16) & 0xff;
1049 SCpnt->cmnd[18] = (unsigned char) (block >> 8) & 0xff;
1050 SCpnt->cmnd[19] = (unsigned char) block & 0xff;
1051
1052 /* Expected Indirect LBA */
1053 SCpnt->cmnd[20] = (unsigned char) (block >> 24) & 0xff;
1054 SCpnt->cmnd[21] = (unsigned char) (block >> 16) & 0xff;
1055 SCpnt->cmnd[22] = (unsigned char) (block >> 8) & 0xff;
1056 SCpnt->cmnd[23] = (unsigned char) block & 0xff;
1057
1058 /* Transfer length */
1059 SCpnt->cmnd[28] = (unsigned char) (this_count >> 24) & 0xff;
1060 SCpnt->cmnd[29] = (unsigned char) (this_count >> 16) & 0xff;
1061 SCpnt->cmnd[30] = (unsigned char) (this_count >> 8) & 0xff;
1062 SCpnt->cmnd[31] = (unsigned char) this_count & 0xff;
e430cbc8 1063 } else if (sdp->use_16_for_rw || (this_count > 0xffff)) {
1da177e4 1064 SCpnt->cmnd[0] += READ_16 - READ_6;
33659ebb 1065 SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0);
1da177e4
LT		 1066 SCpnt->cmnd[2] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0;
1067 SCpnt->cmnd[3] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0;
1068 SCpnt->cmnd[4] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0;
1069 SCpnt->cmnd[5] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0;
1070 SCpnt->cmnd[6] = (unsigned char) (block >> 24) & 0xff;
1071 SCpnt->cmnd[7] = (unsigned char) (block >> 16) & 0xff;
1072 SCpnt->cmnd[8] = (unsigned char) (block >> 8) & 0xff;
1073 SCpnt->cmnd[9] = (unsigned char) block & 0xff;
1074 SCpnt->cmnd[10] = (unsigned char) (this_count >> 24) & 0xff;
1075 SCpnt->cmnd[11] = (unsigned char) (this_count >> 16) & 0xff;
1076 SCpnt->cmnd[12] = (unsigned char) (this_count >> 8) & 0xff;
1077 SCpnt->cmnd[13] = (unsigned char) this_count & 0xff;
1078 SCpnt->cmnd[14] = SCpnt->cmnd[15] = 0;
1079 } else if ((this_count > 0xff) || (block > 0x1fffff) ||
af55ff67 1080 scsi_device_protection(SCpnt->device) ||
1da177e4 1081 SCpnt->device->use_10_for_rw) {
1da177e4 1082 SCpnt->cmnd[0] += READ_10 - READ_6;
33659ebb 1083 SCpnt->cmnd[1] = protect | ((rq->cmd_flags & REQ_FUA) ? 0x8 : 0);
1da177e4
LT		 1084 SCpnt->cmnd[2] = (unsigned char) (block >> 24) & 0xff;
1085 SCpnt->cmnd[3] = (unsigned char) (block >> 16) & 0xff;
1086 SCpnt->cmnd[4] = (unsigned char) (block >> 8) & 0xff;
1087 SCpnt->cmnd[5] = (unsigned char) block & 0xff;
1088 SCpnt->cmnd[6] = SCpnt->cmnd[9] = 0;
1089 SCpnt->cmnd[7] = (unsigned char) (this_count >> 8) & 0xff;
1090 SCpnt->cmnd[8] = (unsigned char) this_count & 0xff;
1091 } else {
33659ebb 1092 if (unlikely(rq->cmd_flags & REQ_FUA)) {
007365ad
TH		 1093 /*
1094 * This happens only if this drive failed
1095 * 10byte rw command with ILLEGAL_REQUEST
1096 * during operation and thus turned off
1097 * use_10_for_rw.
1098 */
e73aec82
MP		 1099 scmd_printk(KERN_ERR, SCpnt,
1100 "FUA write on READ/WRITE(6) drive\n");
7f9a6bc4 1101 goto out;
007365ad
TH		 1102 }
1103
1da177e4
LT		 1104 SCpnt->cmnd[1] |= (unsigned char) ((block >> 16) & 0x1f);
1105 SCpnt->cmnd[2] = (unsigned char) ((block >> 8) & 0xff);
1106 SCpnt->cmnd[3] = (unsigned char) block & 0xff;
1107 SCpnt->cmnd[4] = (unsigned char) this_count;
1108 SCpnt->cmnd[5] = 0;
1109 }
30b0c37b 1110 SCpnt->sdb.length = this_count * sdp->sector_size;
1da177e4 1111
af55ff67 1112 /* If DIF or DIX is enabled, tell HBA how to handle request */
bd623e79 1113 if (host_dif || scsi_prot_sg_count(SCpnt))
35e1a5d9 1114 sd_prot_op(SCpnt, host_dif);
af55ff67 1115
1da177e4
LT		 1116 /*
1117 * We shouldn't disconnect in the middle of a sector, so with a dumb
1118 * host adapter, it's safe to assume that we can at least transfer
1119 * this many bytes between each connect / disconnect.
1120 */
1121 SCpnt->transfersize = sdp->sector_size;
1122 SCpnt->underflow = this_count << 9;
1123 SCpnt->allowed = SD_MAX_RETRIES;
1da177e4 1124
1da177e4
LT		 1125 /*
1126 * This indicates that the command is ready from our end to be
1127 * queued.
1128 */
7f9a6bc4
JB		 1129 ret = BLKPREP_OK;
1130 out:
a1b73fc1 1131 return ret;
1da177e4
LT		 1132}
1133
1134/**
1135 * sd_open - open a scsi disk device
1136 * @inode: only i_rdev member may be used
1137 * @filp: only f_mode and f_flags may be used
1138 *
1139 * Returns 0 if successful. Returns a negated errno value in case
1140 * of error.
1141 *
1142 * Note: This can be called from a user context (e.g. fsck(1) )
1143 * or from within the kernel (e.g. as a result of a mount(1) ).
1144 * In the latter case @inode and @filp carry an abridged amount
1145 * of information as noted above.
409f3499
AB		 1146 *
1147 * Locking: called with bdev->bd_mutex held.
1da177e4 1148 **/
0338e291 1149static int sd_open(struct block_device *bdev, fmode_t mode)
1da177e4 1150{
0338e291 1151 struct scsi_disk *sdkp = scsi_disk_get(bdev->bd_disk);
1da177e4
LT		 1152 struct scsi_device *sdev;
1153 int retval;
1154
0338e291 1155 if (!sdkp)
1da177e4
LT		 1156 return -ENXIO;
1157
fa0d34be 1158 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_open\n"));
1da177e4
LT		 1159
1160 sdev = sdkp->device;
1161
1162 /*
1163 * If the device is in error recovery, wait until it is done.
1164 * If the device is offline, then disallow any access to it.
1165 */
1166 retval = -ENXIO;
1167 if (!scsi_block_when_processing_errors(sdev))
1168 goto error_out;
1169
1170 if (sdev->removable || sdkp->write_prot)
0338e291 1171 check_disk_change(bdev);
1da177e4
LT		 1172
1173 /*
1174 * If the drive is empty, just let the open fail.
1175 */
1176 retval = -ENOMEDIUM;
0338e291 1177 if (sdev->removable && !sdkp->media_present && !(mode & FMODE_NDELAY))
1da177e4
LT		 1178 goto error_out;
1179
1180 /*
1181 * If the device has the write protect tab set, have the open fail
1182 * if the user expects to be able to write to the thing.
1183 */
1184 retval = -EROFS;
0338e291 1185 if (sdkp->write_prot && (mode & FMODE_WRITE))
1da177e4
LT		 1186 goto error_out;
1187
1188 /*
1189 * It is possible that the disk changing stuff resulted in
1190 * the device being taken offline. If this is the case,
1191 * report this to the user, and don't pretend that the
1192 * open actually succeeded.
1193 */
1194 retval = -ENXIO;
1195 if (!scsi_device_online(sdev))
1196 goto error_out;
1197
409f3499 1198 if ((atomic_inc_return(&sdkp->openers) == 1) && sdev->removable) {
1da177e4
LT		 1199 if (scsi_block_when_processing_errors(sdev))
1200 scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT);
1201 }
1202
1203 return 0;
1204
1205error_out:
1206 scsi_disk_put(sdkp);
1207 return retval;
1208}
1209
1210/**
1211 * sd_release - invoked when the (last) close(2) is called on this
1212 * scsi disk.
1213 * @inode: only i_rdev member may be used
1214 * @filp: only f_mode and f_flags may be used
1215 *
1216 * Returns 0.
1217 *
1218 * Note: may block (uninterruptible) if error recovery is underway
1219 * on this disk.
409f3499
AB		 1220 *
1221 * Locking: called with bdev->bd_mutex held.
1da177e4 1222 **/
db2a144b 1223static void sd_release(struct gendisk *disk, fmode_t mode)
1da177e4 1224{
1da177e4
LT		 1225 struct scsi_disk *sdkp = scsi_disk(disk);
1226 struct scsi_device *sdev = sdkp->device;
1227
56937f7b 1228 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_release\n"));
1da177e4 1229
7e443312 1230 if (atomic_dec_return(&sdkp->openers) == 0 && sdev->removable) {
1da177e4
LT		 1231 if (scsi_block_when_processing_errors(sdev))
1232 scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW);
1233 }
1234
1235 /*
1236 * XXX and what if there are packets in flight and this close()
1237 * XXX is followed by a "rmmod sd_mod"?
1238 */
478a8a05 1239
1da177e4 1240 scsi_disk_put(sdkp);
1da177e4
LT		 1241}
1242
a885c8c4 1243static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1da177e4
LT		 1244{
1245 struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk);
1246 struct scsi_device *sdp = sdkp->device;
1247 struct Scsi_Host *host = sdp->host;
1248 int diskinfo[4];
1249
1250 /* default to most commonly used values */
1251 diskinfo[0] = 0x40; /* 1 << 6 */
1252 diskinfo[1] = 0x20; /* 1 << 5 */
1253 diskinfo[2] = sdkp->capacity >> 11;
1254
1255 /* override with calculated, extended default, or driver values */
1256 if (host->hostt->bios_param)
1257 host->hostt->bios_param(sdp, bdev, sdkp->capacity, diskinfo);
1258 else
1259 scsicam_bios_param(bdev, sdkp->capacity, diskinfo);
1260
a885c8c4
CH		 1261 geo->heads = diskinfo[0];
1262 geo->sectors = diskinfo[1];
1263 geo->cylinders = diskinfo[2];
1da177e4
LT		 1264 return 0;
1265}
1266
1267/**
1268 * sd_ioctl - process an ioctl
1269 * @inode: only i_rdev/i_bdev members may be used
1270 * @filp: only f_mode and f_flags may be used
1271 * @cmd: ioctl command number
1272 * @arg: this is third argument given to ioctl(2) system call.
1273 * Often contains a pointer.
1274 *
25985edc 1275 * Returns 0 if successful (some ioctls return positive numbers on
1da177e4
LT		 1276 * success as well). Returns a negated errno value in case of error.
1277 *
1278 * Note: most ioctls are forward onto the block subsystem or further
3a4fa0a2 1279 * down in the scsi subsystem.
1da177e4 1280 **/
0338e291 1281static int sd_ioctl(struct block_device *bdev, fmode_t mode,
1da177e4
LT		 1282 unsigned int cmd, unsigned long arg)
1283{
1da177e4 1284 struct gendisk *disk = bdev->bd_disk;
fe2d1851
NN		 1285 struct scsi_disk *sdkp = scsi_disk(disk);
1286 struct scsi_device *sdp = sdkp->device;
1da177e4
LT		 1287 void __user *p = (void __user *)arg;
1288 int error;
1289
fe2d1851
NN		 1290 SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO, sdkp, "sd_ioctl: disk=%s, "
1291 "cmd=0x%x\n", disk->disk_name, cmd));
1da177e4 1292
0bfc96cb
PB		 1293 error = scsi_verify_blk_ioctl(bdev, cmd);
1294 if (error < 0)
1295 return error;
1296
1da177e4
LT		 1297 /*
1298 * If we are in the middle of error recovery, don't let anyone
1299 * else try and use this device. Also, if error recovery fails, it
1300 * may try and take the device offline, in which case all further
1301 * access to the device is prohibited.
1302 */
83ff6fe8 1303 error = scsi_nonblockable_ioctl(sdp, cmd, p,
fd4ce1ac 1304 (mode & FMODE_NDELAY) != 0);
1da177e4 1305 if (!scsi_block_when_processing_errors(sdp) || !error)
8a6cfeb6 1306 goto out;
1da177e4 1307
1da177e4
LT		 1308 /*
1309 * Send SCSI addressing ioctls directly to mid level, send other
1310 * ioctls to block level and then onto mid level if they can't be
1311 * resolved.
1312 */
1313 switch (cmd) {
1314 case SCSI_IOCTL_GET_IDLUN:
1315 case SCSI_IOCTL_GET_BUS_NUMBER:
8a6cfeb6
AB		 1316 error = scsi_ioctl(sdp, cmd, p);
1317 break;
1da177e4 1318 default:
577ebb37 1319 error = scsi_cmd_blk_ioctl(bdev, mode, cmd, p);
1da177e4 1320 if (error != -ENOTTY)
8a6cfeb6
AB		 1321 break;
1322 error = scsi_ioctl(sdp, cmd, p);
1323 break;
1da177e4 1324 }
8a6cfeb6 1325out:
8a6cfeb6 1326 return error;
1da177e4
LT		 1327}
1328
1329static void set_media_not_present(struct scsi_disk *sdkp)
1330{
2bae0093
TH		 1331 if (sdkp->media_present)
1332 sdkp->device->changed = 1;
1333
1334 if (sdkp->device->removable) {
1335 sdkp->media_present = 0;
1336 sdkp->capacity = 0;
1337 }
1338}
1339
1340static int media_not_present(struct scsi_disk *sdkp,
1341 struct scsi_sense_hdr *sshdr)
1342{
1343 if (!scsi_sense_valid(sshdr))
1344 return 0;
1345
1346 /* not invoked for commands that could return deferred errors */
1347 switch (sshdr->sense_key) {
1348 case UNIT_ATTENTION:
1349 case NOT_READY:
1350 /* medium not present */
1351 if (sshdr->asc == 0x3A) {
1352 set_media_not_present(sdkp);
1353 return 1;
1354 }
1355 }
1356 return 0;
1da177e4
LT		 1357}
1358
1359/**
2bae0093
TH		 1360 * sd_check_events - check media events
1361 * @disk: kernel device descriptor
1362 * @clearing: disk events currently being cleared
1da177e4 1363 *
2bae0093 1364 * Returns mask of DISK_EVENT_*.
1da177e4
LT		 1365 *
1366 * Note: this function is invoked from the block subsystem.
1367 **/
2bae0093 1368static unsigned int sd_check_events(struct gendisk *disk, unsigned int clearing)
1da177e4
LT		 1369{
1370 struct scsi_disk *sdkp = scsi_disk(disk);
1371 struct scsi_device *sdp = sdkp->device;
001aac25 1372 struct scsi_sense_hdr *sshdr = NULL;
1da177e4
LT		 1373 int retval;
1374
2bae0093 1375 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_check_events\n"));
1da177e4
LT		 1376
1377 /*
1378 * If the device is offline, don't send any commands - just pretend as
1379 * if the command failed. If the device ever comes back online, we
1380 * can deal with it then. It is only because of unrecoverable errors
1381 * that we would ever take a device offline in the first place.
1382 */
285e9670
KS		 1383 if (!scsi_device_online(sdp)) {
1384 set_media_not_present(sdkp);
285e9670
KS		 1385 goto out;
1386 }
1da177e4
LT		 1387
1388 /*
1389 * Using TEST_UNIT_READY enables differentiation between drive with
1390 * no cartridge loaded - NOT READY, drive with changed cartridge -
1391 * UNIT ATTENTION, or with same cartridge - GOOD STATUS.
1392 *
1393 * Drives that auto spin down. eg iomega jaz 1G, will be started
1394 * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever
1395 * sd_revalidate() is called.
1396 */
1397 retval = -ENODEV;
285e9670 1398
001aac25
JB		 1399 if (scsi_block_when_processing_errors(sdp)) {
1400 sshdr = kzalloc(sizeof(*sshdr), GFP_KERNEL);
1401 retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, SD_MAX_RETRIES,
1402 sshdr);
1403 }
1da177e4 1404
2bae0093
TH		 1405 /* failed to execute TUR, assume media not present */
1406 if (host_byte(retval)) {
285e9670 1407 set_media_not_present(sdkp);
285e9670
KS		 1408 goto out;
1409 }
1da177e4 1410
2bae0093
TH		 1411 if (media_not_present(sdkp, sshdr))
1412 goto out;
1413
1da177e4
LT		 1414 /*
1415 * For removable scsi disk we have to recognise the presence
2bae0093 1416 * of a disk in the drive.
1da177e4 1417 */
2bae0093
TH		 1418 if (!sdkp->media_present)
1419 sdp->changed = 1;
1da177e4 1420 sdkp->media_present = 1;
285e9670 1421out:
3ff5588d 1422 /*
2bae0093 1423 * sdp->changed is set under the following conditions:
3ff5588d 1424 *
2bae0093
TH		 1425 * Medium present state has changed in either direction.
1426 * Device has indicated UNIT_ATTENTION.
3ff5588d 1427 */
001aac25 1428 kfree(sshdr);
2bae0093
TH		 1429 retval = sdp->changed ? DISK_EVENT_MEDIA_CHANGE : 0;
1430 sdp->changed = 0;
1da177e4 1431 return retval;
1da177e4
LT		 1432}
1433
e73aec82 1434static int sd_sync_cache(struct scsi_disk *sdkp)
1da177e4 1435{
1da177e4 1436 int retries, res;
e73aec82 1437 struct scsi_device *sdp = sdkp->device;
7e660100
JB		 1438 const int timeout = sdp->request_queue->rq_timeout
1439 * SD_FLUSH_TIMEOUT_MULTIPLIER;
ea73a9f2 1440 struct scsi_sense_hdr sshdr;
1da177e4
LT		 1441
1442 if (!scsi_device_online(sdp))
1443 return -ENODEV;
1444
1da177e4
LT		 1445 for (retries = 3; retries > 0; --retries) {
1446 unsigned char cmd[10] = { 0 };
1447
1448 cmd[0] = SYNCHRONIZE_CACHE;
1449 /*
1450 * Leave the rest of the command zero to indicate
1451 * flush everything.
1452 */
9b21493c 1453 res = scsi_execute_req_flags(sdp, cmd, DMA_NONE, NULL, 0,
7e660100
JB		 1454 &sshdr, timeout, SD_MAX_RETRIES,
1455 NULL, REQ_PM);
ea73a9f2 1456 if (res == 0)
1da177e4
LT		 1457 break;
1458 }
1459
e73aec82
MP		 1460 if (res) {
1461 sd_print_result(sdkp, res);
95897910 1462
e73aec82
MP		 1463 if (driver_byte(res) & DRIVER_SENSE)
1464 sd_print_sense_hdr(sdkp, &sshdr);
95897910
ON		 1465 /* we need to evaluate the error return */
1466 if (scsi_sense_valid(&sshdr) &&
7aae5134
AS		 1467 (sshdr.asc == 0x3a || /* medium not present */
1468 sshdr.asc == 0x20)) /* invalid command */
95897910
ON		 1469 /* this is no error here */
1470 return 0;
1471
1472 switch (host_byte(res)) {
1473 /* ignore errors due to racing a disconnection */
1474 case DID_BAD_TARGET:
1475 case DID_NO_CONNECT:
1476 return 0;
1477 /* signal the upper layer it might try again */
1478 case DID_BUS_BUSY:
1479 case DID_IMM_RETRY:
1480 case DID_REQUEUE:
1481 case DID_SOFT_ERROR:
1482 return -EBUSY;
1483 default:
1484 return -EIO;
1485 }
1da177e4 1486 }
3721050a 1487 return 0;
1da177e4
LT		 1488}
1489
1da177e4
LT		 1490static void sd_rescan(struct device *dev)
1491{
39b7f1e2
AS		 1492 struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev);
1493
1494 if (sdkp) {
f98a8cae 1495 revalidate_disk(sdkp->disk);
39b7f1e2
AS		 1496 scsi_disk_put(sdkp);
1497 }
1da177e4
LT		 1498}
1499
1500
1501#ifdef CONFIG_COMPAT
1502/*
1503 * This gets directly called from VFS. When the ioctl
1504 * is not recognized we go back to the other translation paths.
1505 */
0338e291
AV		 1506static int sd_compat_ioctl(struct block_device *bdev, fmode_t mode,
1507 unsigned int cmd, unsigned long arg)
1da177e4 1508{
0338e291 1509 struct scsi_device *sdev = scsi_disk(bdev->bd_disk)->device;
0bfc96cb
PB		 1510 int ret;
1511
1512 ret = scsi_verify_blk_ioctl(bdev, cmd);
1513 if (ret < 0)
1514 return ret;
1da177e4
LT		 1515
1516 /*
1517 * If we are in the middle of error recovery, don't let anyone
1518 * else try and use this device. Also, if error recovery fails, it
1519 * may try and take the device offline, in which case all further
1520 * access to the device is prohibited.
1521 */
1522 if (!scsi_block_when_processing_errors(sdev))
1523 return -ENODEV;
1524
1525 if (sdev->host->hostt->compat_ioctl) {
1da177e4
LT		 1526 ret = sdev->host->hostt->compat_ioctl(sdev, cmd, (void __user *)arg);
1527
1528 return ret;
1529 }
1530
1531 /*
1532 * Let the static ioctl translation table take care of it.
1533 */
1534 return -ENOIOCTLCMD;
1535}
1536#endif
1537
83d5cde4 1538static const struct block_device_operations sd_fops = {
1da177e4 1539 .owner = THIS_MODULE,
0338e291
AV		 1540 .open = sd_open,
1541 .release = sd_release,
8a6cfeb6 1542 .ioctl = sd_ioctl,
a885c8c4 1543 .getgeo = sd_getgeo,
1da177e4 1544#ifdef CONFIG_COMPAT
0338e291 1545 .compat_ioctl = sd_compat_ioctl,
1da177e4 1546#endif
2bae0093 1547 .check_events = sd_check_events,
1da177e4 1548 .revalidate_disk = sd_revalidate_disk,
72ec24bd 1549 .unlock_native_capacity = sd_unlock_native_capacity,
1da177e4
LT		 1550};
1551
18a4d0a2
MP		 1552/**
1553 * sd_eh_action - error handling callback
1554 * @scmd: sd-issued command that has failed
18a4d0a2
MP		 1555 * @eh_disp: The recovery disposition suggested by the midlayer
1556 *
2451079b
JB		 1557 * This function is called by the SCSI midlayer upon completion of an
1558 * error test command (currently TEST UNIT READY). The result of sending
1559 * the eh command is passed in eh_disp. We're looking for devices that
1560 * fail medium access commands but are OK with non access commands like
1561 * test unit ready (so wrongly see the device as having a successful
1562 * recovery)
18a4d0a2 1563 **/
2451079b 1564static int sd_eh_action(struct scsi_cmnd *scmd, int eh_disp)
18a4d0a2
MP		 1565{
1566 struct scsi_disk *sdkp = scsi_disk(scmd->request->rq_disk);
1567
1568 if (!scsi_device_online(scmd->device) ||
2451079b
JB		 1569 !scsi_medium_access_command(scmd) ||
1570 host_byte(scmd->result) != DID_TIME_OUT ||
1571 eh_disp != SUCCESS)
18a4d0a2
MP		 1572 return eh_disp;
1573
1574 /*
1575 * The device has timed out executing a medium access command.
1576 * However, the TEST UNIT READY command sent during error
1577 * handling completed successfully. Either the device is in the
1578 * process of recovering or has it suffered an internal failure
1579 * that prevents access to the storage medium.
1580 */
2451079b 1581 sdkp->medium_access_timed_out++;
18a4d0a2
MP		 1582
1583 /*
1584 * If the device keeps failing read/write commands but TEST UNIT
1585 * READY always completes successfully we assume that medium
1586 * access is no longer possible and take the device offline.
1587 */
1588 if (sdkp->medium_access_timed_out >= sdkp->max_medium_access_timeouts) {
1589 scmd_printk(KERN_ERR, scmd,
1590 "Medium access timeout failure. Offlining disk!\n");
1591 scsi_device_set_state(scmd->device, SDEV_OFFLINE);
1592
1593 return FAILED;
1594 }
1595
1596 return eh_disp;
1597}
1598
af55ff67
MP		 1599static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd)
1600{
83096ebf
TH		 1601 u64 start_lba = blk_rq_pos(scmd->request);
1602 u64 end_lba = blk_rq_pos(scmd->request) + (scsi_bufflen(scmd) / 512);
af55ff67
MP		 1603 u64 bad_lba;
1604 int info_valid;
a8733c7b
JB		 1605 /*
1606 * resid is optional but mostly filled in. When it's unused,
1607 * its value is zero, so we assume the whole buffer transferred
1608 */
1609 unsigned int transferred = scsi_bufflen(scmd) - scsi_get_resid(scmd);
1610 unsigned int good_bytes;
af55ff67 1611
33659ebb 1612 if (scmd->request->cmd_type != REQ_TYPE_FS)
af55ff67
MP		 1613 return 0;
1614
1615 info_valid = scsi_get_sense_info_fld(scmd->sense_buffer,
1616 SCSI_SENSE_BUFFERSIZE,
1617 &bad_lba);
1618 if (!info_valid)
1619 return 0;
1620
1621 if (scsi_bufflen(scmd) <= scmd->device->sector_size)
1622 return 0;
1623
1624 if (scmd->device->sector_size < 512) {
1625 /* only legitimate sector_size here is 256 */
1626 start_lba <<= 1;
1627 end_lba <<= 1;
1628 } else {
1629 /* be careful ... don't want any overflows */
ef80d1e1 1630 unsigned int factor = scmd->device->sector_size / 512;
af55ff67
MP		 1631 do_div(start_lba, factor);
1632 do_div(end_lba, factor);
1633 }
1634
1635 /* The bad lba was reported incorrectly, we have no idea where
1636 * the error is.
1637 */
1638 if (bad_lba < start_lba || bad_lba >= end_lba)
1639 return 0;
1640
1641 /* This computation should always be done in terms of
1642 * the resolution of the device's medium.
1643 */
a8733c7b
JB		 1644 good_bytes = (bad_lba - start_lba) * scmd->device->sector_size;
1645 return min(good_bytes, transferred);
af55ff67
MP		 1646}
1647
1da177e4 1648/**
7b3d9545 1649 * sd_done - bottom half handler: called when the lower level
1da177e4
LT		 1650 * driver has completed (successfully or otherwise) a scsi command.
1651 * @SCpnt: mid-level's per command structure.
1652 *
1653 * Note: potentially run from within an ISR. Must not block.
1654 **/
7b3d9545 1655static int sd_done(struct scsi_cmnd *SCpnt)
1da177e4
LT		 1656{
1657 int result = SCpnt->result;
af55ff67 1658 unsigned int good_bytes = result ? 0 : scsi_bufflen(SCpnt);
1da177e4 1659 struct scsi_sense_hdr sshdr;
4e7392ec 1660 struct scsi_disk *sdkp = scsi_disk(SCpnt->request->rq_disk);
26e85fcd 1661 struct request *req = SCpnt->request;
1da177e4
LT		 1662 int sense_valid = 0;
1663 int sense_deferred = 0;
c98a0eb0 1664 unsigned char op = SCpnt->cmnd[0];
5db44863 1665 unsigned char unmap = SCpnt->cmnd[1] & 8;
1da177e4 1666
5db44863 1667 if (req->cmd_flags & REQ_DISCARD || req->cmd_flags & REQ_WRITE_SAME) {
26e85fcd
MP		 1668 if (!result) {
1669 good_bytes = blk_rq_bytes(req);
1670 scsi_set_resid(SCpnt, 0);
1671 } else {
1672 good_bytes = 0;
1673 scsi_set_resid(SCpnt, blk_rq_bytes(req));
1674 }
1675 }
6a32a8ae 1676
1da177e4
LT		 1677 if (result) {
1678 sense_valid = scsi_command_normalize_sense(SCpnt, &sshdr);
1679 if (sense_valid)
1680 sense_deferred = scsi_sense_is_deferred(&sshdr);
1681 }
1da177e4 1682#ifdef CONFIG_SCSI_LOGGING
fa0d34be 1683 SCSI_LOG_HLCOMPLETE(1, scsi_print_result(SCpnt));
1da177e4 1684 if (sense_valid) {
fa0d34be 1685 SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO, SCpnt,
7b3d9545 1686 "sd_done: sb[respc,sk,asc,"
fa0d34be
MP		 1687 "ascq]=%x,%x,%x,%x\n",
1688 sshdr.response_code,
1689 sshdr.sense_key, sshdr.asc,
1690 sshdr.ascq));
1da177e4
LT		 1691 }
1692#endif
2a863ba8
DJ		 1693 sdkp->medium_access_timed_out = 0;
1694
03aba2f7
LT		 1695 if (driver_byte(result) != DRIVER_SENSE &&
1696 (!sense_valid || sense_deferred))
1697 goto out;
1698
1699 switch (sshdr.sense_key) {
1700 case HARDWARE_ERROR:
1701 case MEDIUM_ERROR:
af55ff67 1702 good_bytes = sd_completed_bytes(SCpnt);
03aba2f7
LT		 1703 break;
1704 case RECOVERED_ERROR:
af55ff67
MP		 1705 good_bytes = scsi_bufflen(SCpnt);
1706 break;
10dab226
JW		 1707 case NO_SENSE:
1708 /* This indicates a false check condition, so ignore it. An
1709 * unknown amount of data was transferred so treat it as an
1710 * error.
1711 */
1712 scsi_print_sense("sd", SCpnt);
1713 SCpnt->result = 0;
1714 memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1715 break;
c98a0eb0
MP		 1716 case ABORTED_COMMAND:
1717 if (sshdr.asc == 0x10) /* DIF: Target detected corruption */
1718 good_bytes = sd_completed_bytes(SCpnt);
1719 break;
1720 case ILLEGAL_REQUEST:
1721 if (sshdr.asc == 0x10) /* DIX: Host detected corruption */
af55ff67 1722 good_bytes = sd_completed_bytes(SCpnt);
c98a0eb0 1723 /* INVALID COMMAND OPCODE or INVALID FIELD IN CDB */
5db44863
MP		 1724 if (sshdr.asc == 0x20 || sshdr.asc == 0x24) {
1725 switch (op) {
1726 case UNMAP:
1727 sd_config_discard(sdkp, SD_LBP_DISABLE);
1728 break;
1729 case WRITE_SAME_16:
1730 case WRITE_SAME:
1731 if (unmap)
1732 sd_config_discard(sdkp, SD_LBP_DISABLE);
1733 else {
1734 sdkp->device->no_write_same = 1;
1735 sd_config_write_same(sdkp);
1736
1737 good_bytes = 0;
1738 req->__data_len = blk_rq_bytes(req);
1739 req->cmd_flags |= REQ_QUIET;
1740 }
1741 }
1742 }
03aba2f7
LT		 1743 break;
1744 default:
1745 break;
1da177e4 1746 }
03aba2f7 1747 out:
af55ff67
MP		 1748 if (rq_data_dir(SCpnt->request) == READ && scsi_prot_sg_count(SCpnt))
1749 sd_dif_complete(SCpnt, good_bytes);
1750
7b3d9545 1751 return good_bytes;
1da177e4
LT		 1752}
1753
1da177e4
LT		 1754/*
1755 * spinup disk - called only in sd_revalidate_disk()
1756 */
1757static void
e73aec82 1758sd_spinup_disk(struct scsi_disk *sdkp)
ea73a9f2 1759{
1da177e4 1760 unsigned char cmd[10];
4451e472 1761 unsigned long spintime_expire = 0;
1da177e4
LT		 1762 int retries, spintime;
1763 unsigned int the_result;
1764 struct scsi_sense_hdr sshdr;
1765 int sense_valid = 0;
1766
1767 spintime = 0;
1768
1769 /* Spin up drives, as required. Only do this at boot time */
1770 /* Spinup needs to be done for module loads too. */
1771 do {
1772 retries = 0;
1773
1774 do {
1775 cmd[0] = TEST_UNIT_READY;
1776 memset((void *) &cmd[1], 0, 9);
1777
ea73a9f2
JB		 1778 the_result = scsi_execute_req(sdkp->device, cmd,
1779 DMA_NONE, NULL, 0,
1780 &sshdr, SD_TIMEOUT,
f4f4e47e 1781 SD_MAX_RETRIES, NULL);
1da177e4 1782
b4d38e38
AS		 1783 /*
1784 * If the drive has indicated to us that it
1785 * doesn't have any media in it, don't bother
1786 * with any more polling.
1787 */
1788 if (media_not_present(sdkp, &sshdr))
1789 return;
1790
1da177e4 1791 if (the_result)
ea73a9f2 1792 sense_valid = scsi_sense_valid(&sshdr);
1da177e4
LT		 1793 retries++;
1794 } while (retries < 3 &&
1795 (!scsi_status_is_good(the_result) ||
1796 ((driver_byte(the_result) & DRIVER_SENSE) &&
1797 sense_valid && sshdr.sense_key == UNIT_ATTENTION)));
1798
1da177e4
LT		 1799 if ((driver_byte(the_result) & DRIVER_SENSE) == 0) {
1800 /* no sense, TUR either succeeded or failed
1801 * with a status error */
e73aec82
MP		 1802 if(!spintime && !scsi_status_is_good(the_result)) {
1803 sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n");
1804 sd_print_result(sdkp, the_result);
1805 }
1da177e4
LT		 1806 break;
1807 }
1808
1809 /*
1810 * The device does not want the automatic start to be issued.
1811 */
33dd6f92 1812 if (sdkp->device->no_start_on_add)
1da177e4 1813 break;
1da177e4 1814
33dd6f92
MW		 1815 if (sense_valid && sshdr.sense_key == NOT_READY) {
1816 if (sshdr.asc == 4 && sshdr.ascq == 3)
1817 break; /* manual intervention required */
1818 if (sshdr.asc == 4 && sshdr.ascq == 0xb)
1819 break; /* standby */
1820 if (sshdr.asc == 4 && sshdr.ascq == 0xc)
1821 break; /* unavailable */
1822 /*
1823 * Issue command to spin up drive when not ready
1824 */
1da177e4 1825 if (!spintime) {
e73aec82 1826 sd_printk(KERN_NOTICE, sdkp, "Spinning up disk...");
1da177e4
LT		 1827 cmd[0] = START_STOP;
1828 cmd[1] = 1; /* Return immediately */
1829 memset((void *) &cmd[2], 0, 8);
1830 cmd[4] = 1; /* Start spin cycle */
d2886ea3
SR		 1831 if (sdkp->device->start_stop_pwr_cond)
1832 cmd[4] |= 1 << 4;
ea73a9f2
JB		 1833 scsi_execute_req(sdkp->device, cmd, DMA_NONE,
1834 NULL, 0, &sshdr,
f4f4e47e
FT		 1835 SD_TIMEOUT, SD_MAX_RETRIES,
1836 NULL);
4451e472
AS		 1837 spintime_expire = jiffies + 100 * HZ;
1838 spintime = 1;
1da177e4 1839 }
1da177e4
LT		 1840 /* Wait 1 second for next try */
1841 msleep(1000);
1842 printk(".");
4451e472
AS		 1843
1844 /*
1845 * Wait for USB flash devices with slow firmware.
1846 * Yes, this sense key/ASC combination shouldn't
1847 * occur here. It's characteristic of these devices.
1848 */
1849 } else if (sense_valid &&
1850 sshdr.sense_key == UNIT_ATTENTION &&
1851 sshdr.asc == 0x28) {
1852 if (!spintime) {
1853 spintime_expire = jiffies + 5 * HZ;
1854 spintime = 1;
1855 }
1856 /* Wait 1 second for next try */
1857 msleep(1000);
1da177e4
LT		 1858 } else {
1859 /* we don't understand the sense code, so it's
1860 * probably pointless to loop */
1861 if(!spintime) {
e73aec82
MP		 1862 sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n");
1863 sd_print_sense_hdr(sdkp, &sshdr);
1da177e4
LT		 1864 }
1865 break;
1866 }
1867
4451e472 1868 } while (spintime && time_before_eq(jiffies, spintime_expire));
1da177e4
LT		 1869
1870 if (spintime) {
1871 if (scsi_status_is_good(the_result))
1872 printk("ready\n");
1873 else
1874 printk("not responding...\n");
1875 }
1876}
1877
e0597d70
MP		 1878
1879/*
1880 * Determine whether disk supports Data Integrity Field.
1881 */
fe542396 1882static int sd_read_protection_type(struct scsi_disk *sdkp, unsigned char *buffer)
e0597d70
MP		 1883{
1884 struct scsi_device *sdp = sdkp->device;
1885 u8 type;
fe542396 1886 int ret = 0;
e0597d70
MP		 1887
1888 if (scsi_device_protection(sdp) == 0 || (buffer[12] & 1) == 0)
fe542396 1889 return ret;
35e1a5d9
MP		 1890
1891 type = ((buffer[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */
1892
fe542396
MP		 1893 if (type > SD_DIF_TYPE3_PROTECTION)
1894 ret = -ENODEV;
1895 else if (scsi_host_dif_capable(sdp->host, type))
1896 ret = 1;
1897
1898 if (sdkp->first_scan || type != sdkp->protection_type)
1899 switch (ret) {
1900 case -ENODEV:
1901 sd_printk(KERN_ERR, sdkp, "formatted with unsupported" \
1902 " protection type %u. Disabling disk!\n",
1903 type);
1904 break;
1905 case 1:
1906 sd_printk(KERN_NOTICE, sdkp,
1907 "Enabling DIF Type %u protection\n", type);
1908 break;
1909 case 0:
1910 sd_printk(KERN_NOTICE, sdkp,
1911 "Disabling DIF Type %u protection\n", type);
1912 break;
1913 }
e0597d70 1914
be922f47
MP		 1915 sdkp->protection_type = type;
1916
fe542396 1917 return ret;
e0597d70
MP		 1918}
1919
0da205e0
MW		 1920static void read_capacity_error(struct scsi_disk *sdkp, struct scsi_device *sdp,
1921 struct scsi_sense_hdr *sshdr, int sense_valid,
1922 int the_result)
1923{
1924 sd_print_result(sdkp, the_result);
1925 if (driver_byte(the_result) & DRIVER_SENSE)
1926 sd_print_sense_hdr(sdkp, sshdr);
1927 else
1928 sd_printk(KERN_NOTICE, sdkp, "Sense not available.\n");
1929
1930 /*
1931 * Set dirty bit for removable devices if not ready -
1932 * sometimes drives will not report this properly.
1933 */
1934 if (sdp->removable &&
1935 sense_valid && sshdr->sense_key == NOT_READY)
2bae0093 1936 set_media_not_present(sdkp);
0da205e0
MW		 1937
1938 /*
1939 * We used to set media_present to 0 here to indicate no media
1940 * in the drive, but some drives fail read capacity even with
1941 * media present, so we can't do that.
1942 */
1943 sdkp->capacity = 0; /* unknown mapped to zero - as usual */
1944}
1945
1946#define RC16_LEN 32
1947#if RC16_LEN > SD_BUF_SIZE
1948#error RC16_LEN must not be more than SD_BUF_SIZE
1949#endif
1950
3233ac19
JB		 1951#define READ_CAPACITY_RETRIES_ON_RESET 10
1952
0da205e0
MW		 1953static int read_capacity_16(struct scsi_disk *sdkp, struct scsi_device *sdp,
1954 unsigned char *buffer)
ea73a9f2 1955{
1da177e4 1956 unsigned char cmd[16];
1da177e4
LT		 1957 struct scsi_sense_hdr sshdr;
1958 int sense_valid = 0;
0da205e0 1959 int the_result;
3233ac19 1960 int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET;
ea09bcc9 1961 unsigned int alignment;
0da205e0
MW		 1962 unsigned long long lba;
1963 unsigned sector_size;
1da177e4 1964
5ce524bd
HG		 1965 if (sdp->no_read_capacity_16)
1966 return -EINVAL;
1967
1da177e4 1968 do {
0da205e0
MW		 1969 memset(cmd, 0, 16);
1970 cmd[0] = SERVICE_ACTION_IN;
1971 cmd[1] = SAI_READ_CAPACITY_16;
1972 cmd[13] = RC16_LEN;
1973 memset(buffer, 0, RC16_LEN);
1974
ea73a9f2 1975 the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE,
0da205e0
MW		 1976 buffer, RC16_LEN, &sshdr,
1977 SD_TIMEOUT, SD_MAX_RETRIES, NULL);
1da177e4 1978
ea73a9f2 1979 if (media_not_present(sdkp, &sshdr))
0da205e0 1980 return -ENODEV;
1da177e4 1981
2b301307 1982 if (the_result) {
ea73a9f2 1983 sense_valid = scsi_sense_valid(&sshdr);
2b301307
MW		 1984 if (sense_valid &&
1985 sshdr.sense_key == ILLEGAL_REQUEST &&
1986 (sshdr.asc == 0x20 || sshdr.asc == 0x24) &&
1987 sshdr.ascq == 0x00)
1988 /* Invalid Command Operation Code or
1989 * Invalid Field in CDB, just retry
1990 * silently with RC10 */
1991 return -EINVAL;
3233ac19
JB		 1992 if (sense_valid &&
1993 sshdr.sense_key == UNIT_ATTENTION &&
1994 sshdr.asc == 0x29 && sshdr.ascq == 0x00)
1995 /* Device reset might occur several times,
1996 * give it one more chance */
1997 if (--reset_retries > 0)
1998 continue;
2b301307 1999 }
1da177e4
LT		 2000 retries--;
2001
2002 } while (the_result && retries);
2003
0da205e0 2004 if (the_result) {
e73aec82 2005 sd_printk(KERN_NOTICE, sdkp, "READ CAPACITY(16) failed\n");
0da205e0
MW		 2006 read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result);
2007 return -EINVAL;
2008 }
e73aec82 2009
8f76d151
DH		 2010 sector_size = get_unaligned_be32(&buffer[8]);
2011 lba = get_unaligned_be64(&buffer[0]);
0da205e0 2012
fe542396
MP		 2013 if (sd_read_protection_type(sdkp, buffer) < 0) {
2014 sdkp->capacity = 0;
2015 return -ENODEV;
2016 }
0da205e0
MW		 2017
2018 if ((sizeof(sdkp->capacity) == 4) && (lba >= 0xffffffffULL)) {
2019 sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a "
2020 "kernel compiled with support for large block "
2021 "devices.\n");
2022 sdkp->capacity = 0;
2023 return -EOVERFLOW;
2024 }
2025
ea09bcc9 2026 /* Logical blocks per physical block exponent */
526f7c79 2027 sdkp->physical_block_size = (1 << (buffer[13] & 0xf)) * sector_size;
ea09bcc9
MP		 2028
2029 /* Lowest aligned logical block */
2030 alignment = ((buffer[14] & 0x3f) << 8 | buffer[15]) * sector_size;
2031 blk_queue_alignment_offset(sdp->request_queue, alignment);
2032 if (alignment && sdkp->first_scan)
2033 sd_printk(KERN_NOTICE, sdkp,
2034 "physical block alignment offset: %u\n", alignment);
2035
c98a0eb0
MP		 2036 if (buffer[14] & 0x80) { /* LBPME */
2037 sdkp->lbpme = 1;
e339c1a7 2038
c98a0eb0
MP		 2039 if (buffer[14] & 0x40) /* LBPRZ */
2040 sdkp->lbprz = 1;
e339c1a7 2041
c98a0eb0 2042 sd_config_discard(sdkp, SD_LBP_WS16);
e339c1a7
MP		 2043 }
2044
0da205e0
MW		 2045 sdkp->capacity = lba + 1;
2046 return sector_size;
2047}
2048
2049static int read_capacity_10(struct scsi_disk *sdkp, struct scsi_device *sdp,
2050 unsigned char *buffer)
2051{
2052 unsigned char cmd[16];
2053 struct scsi_sense_hdr sshdr;
2054 int sense_valid = 0;
2055 int the_result;
3233ac19 2056 int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET;
0da205e0
MW		 2057 sector_t lba;
2058 unsigned sector_size;
2059
2060 do {
2061 cmd[0] = READ_CAPACITY;
2062 memset(&cmd[1], 0, 9);
2063 memset(buffer, 0, 8);
2064
2065 the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE,
2066 buffer, 8, &sshdr,
2067 SD_TIMEOUT, SD_MAX_RETRIES, NULL);
2068
2069 if (media_not_present(sdkp, &sshdr))
2070 return -ENODEV;
2071
3233ac19 2072 if (the_result) {
0da205e0 2073 sense_valid = scsi_sense_valid(&sshdr);
3233ac19
JB		 2074 if (sense_valid &&
2075 sshdr.sense_key == UNIT_ATTENTION &&
2076 sshdr.asc == 0x29 && sshdr.ascq == 0x00)
2077 /* Device reset might occur several times,
2078 * give it one more chance */
2079 if (--reset_retries > 0)
2080 continue;
2081 }
0da205e0
MW		 2082 retries--;
2083
2084 } while (the_result && retries);
2085
2086 if (the_result) {
2087 sd_printk(KERN_NOTICE, sdkp, "READ CAPACITY failed\n");
2088 read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result);
2089 return -EINVAL;
2090 }
2091
8f76d151
DH		 2092 sector_size = get_unaligned_be32(&buffer[4]);
2093 lba = get_unaligned_be32(&buffer[0]);
0da205e0 2094
5ce524bd
HG		 2095 if (sdp->no_read_capacity_16 && (lba == 0xffffffff)) {
2096 /* Some buggy (usb cardreader) devices return an lba of
2097 0xffffffff when the want to report a size of 0 (with
2098 which they really mean no media is present) */
2099 sdkp->capacity = 0;
5cc10350 2100 sdkp->physical_block_size = sector_size;
5ce524bd
HG		 2101 return sector_size;
2102 }
2103
0da205e0
MW		 2104 if ((sizeof(sdkp->capacity) == 4) && (lba == 0xffffffff)) {
2105 sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use a "
2106 "kernel compiled with support for large block "
2107 "devices.\n");
2108 sdkp->capacity = 0;
2109 return -EOVERFLOW;
2110 }
2111
2112 sdkp->capacity = lba + 1;
526f7c79 2113 sdkp->physical_block_size = sector_size;
0da205e0
MW		 2114 return sector_size;
2115}
2116
2b301307
MW		 2117static int sd_try_rc16_first(struct scsi_device *sdp)
2118{
f87146bb
HR		 2119 if (sdp->host->max_cmd_len < 16)
2120 return 0;
6a0bdffa
AS		 2121 if (sdp->try_rc_10_first)
2122 return 0;
2b301307
MW		 2123 if (sdp->scsi_level > SCSI_SPC_2)
2124 return 1;
2125 if (scsi_device_protection(sdp))
2126 return 1;
2127 return 0;
2128}
2129
0da205e0
MW		 2130/*
2131 * read disk capacity
2132 */
2133static void
2134sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer)
2135{
2136 int sector_size;
2137 struct scsi_device *sdp = sdkp->device;
70a9b873 2138 sector_t old_capacity = sdkp->capacity;
0da205e0 2139
2b301307 2140 if (sd_try_rc16_first(sdp)) {
0da205e0
MW		 2141 sector_size = read_capacity_16(sdkp, sdp, buffer);
2142 if (sector_size == -EOVERFLOW)
1da177e4 2143 goto got_data;
2b301307
MW		 2144 if (sector_size == -ENODEV)
2145 return;
2146 if (sector_size < 0)
2147 sector_size = read_capacity_10(sdkp, sdp, buffer);
0da205e0
MW		 2148 if (sector_size < 0)
2149 return;
1da177e4 2150 } else {
0da205e0
MW		 2151 sector_size = read_capacity_10(sdkp, sdp, buffer);
2152 if (sector_size == -EOVERFLOW)
2153 goto got_data;
2154 if (sector_size < 0)
2155 return;
2156 if ((sizeof(sdkp->capacity) > 4) &&
2157 (sdkp->capacity > 0xffffffffULL)) {
2158 int old_sector_size = sector_size;
2159 sd_printk(KERN_NOTICE, sdkp, "Very big device. "
2160 "Trying to use READ CAPACITY(16).\n");
2161 sector_size = read_capacity_16(sdkp, sdp, buffer);
2162 if (sector_size < 0) {
2163 sd_printk(KERN_NOTICE, sdkp,
2164 "Using 0xffffffff as device size\n");
2165 sdkp->capacity = 1 + (sector_t) 0xffffffff;
2166 sector_size = old_sector_size;
2167 goto got_data;
2168 }
2169 }
2170 }
1da177e4 2171
5c211caa
AS		 2172 /* Some devices are known to return the total number of blocks,
2173 * not the highest block number. Some devices have versions
2174 * which do this and others which do not. Some devices we might
2175 * suspect of doing this but we don't know for certain.
2176 *
2177 * If we know the reported capacity is wrong, decrement it. If
2178 * we can only guess, then assume the number of blocks is even
2179 * (usually true but not always) and err on the side of lowering
2180 * the capacity.
2181 */
2182 if (sdp->fix_capacity ||
2183 (sdp->guess_capacity && (sdkp->capacity & 0x01))) {
2184 sd_printk(KERN_INFO, sdkp, "Adjusting the sector count "
2185 "from its reported value: %llu\n",
2186 (unsigned long long) sdkp->capacity);
1da177e4 2187 --sdkp->capacity;
61bf54b7
ON		 2188 }
2189
1da177e4
LT		 2190got_data:
2191 if (sector_size == 0) {
2192 sector_size = 512;
e73aec82
MP		 2193 sd_printk(KERN_NOTICE, sdkp, "Sector size 0 reported, "
2194 "assuming 512.\n");
1da177e4
LT		 2195 }
2196
2197 if (sector_size != 512 &&
2198 sector_size != 1024 &&
2199 sector_size != 2048 &&
2200 sector_size != 4096 &&
2201 sector_size != 256) {
e73aec82
MP		 2202 sd_printk(KERN_NOTICE, sdkp, "Unsupported sector size %d.\n",
2203 sector_size);
1da177e4
LT		 2204 /*
2205 * The user might want to re-format the drive with
2206 * a supported sectorsize. Once this happens, it
2207 * would be relatively trivial to set the thing up.
2208 * For this reason, we leave the thing in the table.
2209 */
2210 sdkp->capacity = 0;
2211 /*
2212 * set a bogus sector size so the normal read/write
2213 * logic in the block layer will eventually refuse any
2214 * request on this device without tripping over power
2215 * of two sector size assumptions
2216 */
2217 sector_size = 512;
2218 }
e1defc4f 2219 blk_queue_logical_block_size(sdp->request_queue, sector_size);
7404ad3b 2220
1da177e4 2221 {
7404ad3b 2222 char cap_str_2[10], cap_str_10[10];
520a2c27 2223 u64 sz = (u64)sdkp->capacity << ilog2(sector_size);
1da177e4 2224
7404ad3b
JB		 2225 string_get_size(sz, STRING_UNITS_2, cap_str_2,
2226 sizeof(cap_str_2));
2227 string_get_size(sz, STRING_UNITS_10, cap_str_10,
2228 sizeof(cap_str_10));
1da177e4 2229
ea09bcc9 2230 if (sdkp->first_scan || old_capacity != sdkp->capacity) {
70a9b873 2231 sd_printk(KERN_NOTICE, sdkp,
ea09bcc9 2232 "%llu %d-byte logical blocks: (%s/%s)\n",
70a9b873
MP		 2233 (unsigned long long)sdkp->capacity,
2234 sector_size, cap_str_10, cap_str_2);
ea09bcc9 2235
526f7c79 2236 if (sdkp->physical_block_size != sector_size)
ea09bcc9
MP		 2237 sd_printk(KERN_NOTICE, sdkp,
2238 "%u-byte physical blocks\n",
526f7c79 2239 sdkp->physical_block_size);
ea09bcc9 2240 }
1da177e4
LT		 2241 }
2242
bcdb247c
MP		 2243 if (sdkp->capacity > 0xffffffff) {
2244 sdp->use_16_for_rw = 1;
2245 sdkp->max_xfer_blocks = SD_MAX_XFER_BLOCKS;
2246 } else
2247 sdkp->max_xfer_blocks = SD_DEF_XFER_BLOCKS;
53ad570b 2248
1da177e4
LT		 2249 /* Rescale capacity to 512-byte units */
2250 if (sector_size == 4096)
2251 sdkp->capacity <<= 3;
2252 else if (sector_size == 2048)
2253 sdkp->capacity <<= 2;
2254 else if (sector_size == 1024)
2255 sdkp->capacity <<= 1;
2256 else if (sector_size == 256)
2257 sdkp->capacity >>= 1;
2258
526f7c79
MP		 2259 blk_queue_physical_block_size(sdp->request_queue,
2260 sdkp->physical_block_size);
1da177e4
LT		 2261 sdkp->device->sector_size = sector_size;
2262}
2263
2264/* called with buffer of length 512 */
2265static inline int
ea73a9f2
JB		 2266sd_do_mode_sense(struct scsi_device *sdp, int dbd, int modepage,
2267 unsigned char *buffer, int len, struct scsi_mode_data *data,
2268 struct scsi_sense_hdr *sshdr)
1da177e4 2269{
ea73a9f2 2270 return scsi_mode_sense(sdp, dbd, modepage, buffer, len,
1cf72699 2271 SD_TIMEOUT, SD_MAX_RETRIES, data,
ea73a9f2 2272 sshdr);
1da177e4
LT		 2273}
2274
2275/*
2276 * read write protect setting, if possible - called only in sd_revalidate_disk()
48970800 2277 * called with buffer of length SD_BUF_SIZE
1da177e4
LT		 2278 */
2279static void
e73aec82 2280sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer)
ea73a9f2 2281{
1da177e4 2282 int res;
ea73a9f2 2283 struct scsi_device *sdp = sdkp->device;
1da177e4 2284 struct scsi_mode_data data;
70a9b873 2285 int old_wp = sdkp->write_prot;
1da177e4
LT		 2286
2287 set_disk_ro(sdkp->disk, 0);
ea73a9f2 2288 if (sdp->skip_ms_page_3f) {
b2bff6ce 2289 sd_first_printk(KERN_NOTICE, sdkp, "Assuming Write Enabled\n");
1da177e4
LT		 2290 return;
2291 }
2292
ea73a9f2
JB		 2293 if (sdp->use_192_bytes_for_3f) {
2294 res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 192, &data, NULL);
1da177e4
LT		 2295 } else {
2296 /*
2297 * First attempt: ask for all pages (0x3F), but only 4 bytes.
2298 * We have to start carefully: some devices hang if we ask
2299 * for more than is available.
2300 */
ea73a9f2 2301 res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 4, &data, NULL);
1da177e4
LT		 2302
2303 /*
2304 * Second attempt: ask for page 0 When only page 0 is
2305 * implemented, a request for page 3F may return Sense Key
2306 * 5: Illegal Request, Sense Code 24: Invalid field in
2307 * CDB.
2308 */
2309 if (!scsi_status_is_good(res))
ea73a9f2 2310 res = sd_do_mode_sense(sdp, 0, 0, buffer, 4, &data, NULL);
1da177e4
LT		 2311
2312 /*
2313 * Third attempt: ask 255 bytes, as we did earlier.
2314 */
2315 if (!scsi_status_is_good(res))
ea73a9f2
JB		 2316 res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 255,
2317 &data, NULL);
1da177e4
LT		 2318 }
2319
2320 if (!scsi_status_is_good(res)) {
b2bff6ce 2321 sd_first_printk(KERN_WARNING, sdkp,
e73aec82 2322 "Test WP failed, assume Write Enabled\n");
1da177e4
LT		 2323 } else {
2324 sdkp->write_prot = ((data.device_specific & 0x80) != 0);
2325 set_disk_ro(sdkp->disk, sdkp->write_prot);
70a9b873
MP		 2326 if (sdkp->first_scan || old_wp != sdkp->write_prot) {
2327 sd_printk(KERN_NOTICE, sdkp, "Write Protect is %s\n",
2328 sdkp->write_prot ? "on" : "off");
2329 sd_printk(KERN_DEBUG, sdkp,
2330 "Mode Sense: %02x %02x %02x %02x\n",
2331 buffer[0], buffer[1], buffer[2], buffer[3]);
2332 }
1da177e4
LT		 2333 }
2334}
2335
2336/*
2337 * sd_read_cache_type - called only from sd_revalidate_disk()
48970800 2338 * called with buffer of length SD_BUF_SIZE
1da177e4
LT		 2339 */
2340static void
e73aec82 2341sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer)
631e8a13 2342{
1da177e4 2343 int len = 0, res;
ea73a9f2 2344 struct scsi_device *sdp = sdkp->device;
1da177e4 2345
631e8a13
AV		 2346 int dbd;
2347 int modepage;
0bcaa111 2348 int first_len;
1da177e4
LT		 2349 struct scsi_mode_data data;
2350 struct scsi_sense_hdr sshdr;
70a9b873
MP		 2351 int old_wce = sdkp->WCE;
2352 int old_rcd = sdkp->RCD;
2353 int old_dpofua = sdkp->DPOFUA;
1da177e4 2354
39c60a09
JB		 2355
2356 if (sdkp->cache_override)
2357 return;
2358
0bcaa111
LT		 2359 first_len = 4;
2360 if (sdp->skip_ms_page_8) {
2361 if (sdp->type == TYPE_RBC)
2362 goto defaults;
2363 else {
2364 if (sdp->skip_ms_page_3f)
2365 goto defaults;
2366 modepage = 0x3F;
2367 if (sdp->use_192_bytes_for_3f)
2368 first_len = 192;
2369 dbd = 0;
2370 }
2371 } else if (sdp->type == TYPE_RBC) {
631e8a13
AV		 2372 modepage = 6;
2373 dbd = 8;
2374 } else {
2375 modepage = 8;
2376 dbd = 0;
2377 }
2378
1da177e4 2379 /* cautiously ask */
0bcaa111
LT		 2380 res = sd_do_mode_sense(sdp, dbd, modepage, buffer, first_len,
2381 &data, &sshdr);
1da177e4
LT		 2382
2383 if (!scsi_status_is_good(res))
2384 goto bad_sense;
2385
6d73c851
AV		 2386 if (!data.header_length) {
2387 modepage = 6;
0bcaa111 2388 first_len = 0;
b2bff6ce
MP		 2389 sd_first_printk(KERN_ERR, sdkp,
2390 "Missing header in MODE_SENSE response\n");
6d73c851
AV		 2391 }
2392
1da177e4
LT		 2393 /* that went OK, now ask for the proper length */
2394 len = data.length;
2395
2396 /*
2397 * We're only interested in the first three bytes, actually.
2398 * But the data cache page is defined for the first 20.
2399 */
2400 if (len < 3)
2401 goto bad_sense;
0bcaa111 2402 else if (len > SD_BUF_SIZE) {
b2bff6ce 2403 sd_first_printk(KERN_NOTICE, sdkp, "Truncating mode parameter "
0bcaa111
LT		 2404 "data from %d to %d bytes\n", len, SD_BUF_SIZE);
2405 len = SD_BUF_SIZE;
2406 }
2407 if (modepage == 0x3F && sdp->use_192_bytes_for_3f)
2408 len = 192;
1da177e4
LT		 2409
2410 /* Get the data */
0bcaa111
LT		 2411 if (len > first_len)
2412 res = sd_do_mode_sense(sdp, dbd, modepage, buffer, len,
2413 &data, &sshdr);
1da177e4
LT		 2414
2415 if (scsi_status_is_good(res)) {
631e8a13 2416 int offset = data.header_length + data.block_descriptor_length;
1da177e4 2417
0bcaa111
LT		 2418 while (offset < len) {
2419 u8 page_code = buffer[offset] & 0x3F;
2420 u8 spf = buffer[offset] & 0x40;
2421
2422 if (page_code == 8 || page_code == 6) {
2423 /* We're interested only in the first 3 bytes.
2424 */
2425 if (len - offset <= 2) {
b2bff6ce
MP		 2426 sd_first_printk(KERN_ERR, sdkp,
2427 "Incomplete mode parameter "
2428 "data\n");
0bcaa111
LT		 2429 goto defaults;
2430 } else {
2431 modepage = page_code;
2432 goto Page_found;
2433 }
2434 } else {
2435 /* Go to the next page */
2436 if (spf && len - offset > 3)
2437 offset += 4 + (buffer[offset+2] << 8) +
2438 buffer[offset+3];
2439 else if (!spf && len - offset > 1)
2440 offset += 2 + buffer[offset+1];
2441 else {
b2bff6ce
MP		 2442 sd_first_printk(KERN_ERR, sdkp,
2443 "Incomplete mode "
2444 "parameter data\n");
0bcaa111
LT		 2445 goto defaults;
2446 }
2447 }
48970800
AV		 2448 }
2449
b2bff6ce 2450 sd_first_printk(KERN_ERR, sdkp, "No Caching mode page found\n");
984f1733
AS		 2451 goto defaults;
2452
0bcaa111 2453 Page_found:
631e8a13
AV		 2454 if (modepage == 8) {
2455 sdkp->WCE = ((buffer[offset + 2] & 0x04) != 0);
2456 sdkp->RCD = ((buffer[offset + 2] & 0x01) != 0);
2457 } else {
2458 sdkp->WCE = ((buffer[offset + 2] & 0x01) == 0);
2459 sdkp->RCD = 0;
2460 }
1da177e4 2461
007365ad 2462 sdkp->DPOFUA = (data.device_specific & 0x10) != 0;
b14bf2d0
AS		 2463 if (sdp->broken_fua) {
2464 sd_first_printk(KERN_NOTICE, sdkp, "Disabling FUA\n");
2465 sdkp->DPOFUA = 0;
2466 } else if (sdkp->DPOFUA && !sdkp->device->use_10_for_rw) {
b2bff6ce 2467 sd_first_printk(KERN_NOTICE, sdkp,
e73aec82 2468 "Uses READ/WRITE(6), disabling FUA\n");
007365ad
TH		 2469 sdkp->DPOFUA = 0;
2470 }
2471
70a9b873
MP		 2472 if (sdkp->first_scan || old_wce != sdkp->WCE ||
2473 old_rcd != sdkp->RCD || old_dpofua != sdkp->DPOFUA)
2474 sd_printk(KERN_NOTICE, sdkp,
2475 "Write cache: %s, read cache: %s, %s\n",
2476 sdkp->WCE ? "enabled" : "disabled",
2477 sdkp->RCD ? "disabled" : "enabled",
2478 sdkp->DPOFUA ? "supports DPO and FUA"
2479 : "doesn't support DPO or FUA");
1da177e4
LT		 2480
2481 return;
2482 }
2483
2484bad_sense:
ea73a9f2 2485 if (scsi_sense_valid(&sshdr) &&
1da177e4
LT		 2486 sshdr.sense_key == ILLEGAL_REQUEST &&
2487 sshdr.asc == 0x24 && sshdr.ascq == 0x0)
e73aec82 2488 /* Invalid field in CDB */
b2bff6ce 2489 sd_first_printk(KERN_NOTICE, sdkp, "Cache data unavailable\n");
1da177e4 2490 else
b2bff6ce
MP		 2491 sd_first_printk(KERN_ERR, sdkp,
2492 "Asking for cache data failed\n");
1da177e4
LT		 2493
2494defaults:
b81478d8 2495 if (sdp->wce_default_on) {
b2bff6ce
MP		 2496 sd_first_printk(KERN_NOTICE, sdkp,
2497 "Assuming drive cache: write back\n");
b81478d8
NJ		 2498 sdkp->WCE = 1;
2499 } else {
b2bff6ce
MP		 2500 sd_first_printk(KERN_ERR, sdkp,
2501 "Assuming drive cache: write through\n");
b81478d8
NJ		 2502 sdkp->WCE = 0;
2503 }
1da177e4 2504 sdkp->RCD = 0;
48970800 2505 sdkp->DPOFUA = 0;
1da177e4
LT		 2506}
2507
e0597d70
MP		 2508/*
2509 * The ATO bit indicates whether the DIF application tag is available
2510 * for use by the operating system.
2511 */
439d77f7 2512static void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer)
e0597d70
MP		 2513{
2514 int res, offset;
2515 struct scsi_device *sdp = sdkp->device;
2516 struct scsi_mode_data data;
2517 struct scsi_sense_hdr sshdr;
2518
2519 if (sdp->type != TYPE_DISK)
2520 return;
2521
2522 if (sdkp->protection_type == 0)
2523 return;
2524
2525 res = scsi_mode_sense(sdp, 1, 0x0a, buffer, 36, SD_TIMEOUT,
2526 SD_MAX_RETRIES, &data, &sshdr);
2527
2528 if (!scsi_status_is_good(res) || !data.header_length ||
2529 data.length < 6) {
b2bff6ce 2530 sd_first_printk(KERN_WARNING, sdkp,
e0597d70
MP		 2531 "getting Control mode page failed, assume no ATO\n");
2532
2533 if (scsi_sense_valid(&sshdr))
2534 sd_print_sense_hdr(sdkp, &sshdr);
2535
2536 return;
2537 }
2538
2539 offset = data.header_length + data.block_descriptor_length;
2540
2541 if ((buffer[offset] & 0x3f) != 0x0a) {
b2bff6ce 2542 sd_first_printk(KERN_ERR, sdkp, "ATO Got wrong page\n");
e0597d70
MP		 2543 return;
2544 }
2545
2546 if ((buffer[offset + 5] & 0x80) == 0)
2547 return;
2548
2549 sdkp->ATO = 1;
2550
2551 return;
2552}
2553
d11b6916
MP		 2554/**
2555 * sd_read_block_limits - Query disk device for preferred I/O sizes.
2556 * @disk: disk to query
2557 */
2558static void sd_read_block_limits(struct scsi_disk *sdkp)
2559{
2560 unsigned int sector_sz = sdkp->device->sector_size;
bb2d3de1 2561 const int vpd_len = 64;
bcdb247c 2562 u32 max_xfer_length;
e3deec09 2563 unsigned char *buffer = kmalloc(vpd_len, GFP_KERNEL);
d11b6916 2564
e3deec09
JB		 2565 if (!buffer ||
2566 /* Block Limits VPD */
2567 scsi_get_vpd_page(sdkp->device, 0xb0, buffer, vpd_len))
2568 goto out;
d11b6916 2569
bcdb247c
MP		 2570 max_xfer_length = get_unaligned_be32(&buffer[8]);
2571 if (max_xfer_length)
2572 sdkp->max_xfer_blocks = max_xfer_length;
2573
d11b6916
MP		 2574 blk_queue_io_min(sdkp->disk->queue,
2575 get_unaligned_be16(&buffer[6]) * sector_sz);
2576 blk_queue_io_opt(sdkp->disk->queue,
2577 get_unaligned_be32(&buffer[12]) * sector_sz);
2578
c98a0eb0
MP		 2579 if (buffer[3] == 0x3c) {
2580 unsigned int lba_count, desc_count;
e339c1a7 2581
5db44863 2582 sdkp->max_ws_blocks = (u32)get_unaligned_be64(&buffer[36]);
e339c1a7 2583
c98a0eb0 2584 if (!sdkp->lbpme)
045d3fe7 2585 goto out;
045d3fe7 2586
c98a0eb0
MP		 2587 lba_count = get_unaligned_be32(&buffer[20]);
2588 desc_count = get_unaligned_be32(&buffer[24]);
045d3fe7 2589
c98a0eb0
MP		 2590 if (lba_count && desc_count)
2591 sdkp->max_unmap_blocks = lba_count;
e339c1a7 2592
c98a0eb0 2593 sdkp->unmap_granularity = get_unaligned_be32(&buffer[28]);
e339c1a7
MP		 2594
2595 if (buffer[32] & 0x80)
c98a0eb0 2596 sdkp->unmap_alignment =
e339c1a7 2597 get_unaligned_be32(&buffer[32]) & ~(1 << 31);
c98a0eb0
MP		 2598
2599 if (!sdkp->lbpvpd) { /* LBP VPD page not provided */
2600
2601 if (sdkp->max_unmap_blocks)
2602 sd_config_discard(sdkp, SD_LBP_UNMAP);
2603 else
2604 sd_config_discard(sdkp, SD_LBP_WS16);
2605
2606 } else { /* LBP VPD page tells us what to use */
2607
2608 if (sdkp->lbpu && sdkp->max_unmap_blocks)
2609 sd_config_discard(sdkp, SD_LBP_UNMAP);
2610 else if (sdkp->lbpws)
2611 sd_config_discard(sdkp, SD_LBP_WS16);
2612 else if (sdkp->lbpws10)
2613 sd_config_discard(sdkp, SD_LBP_WS10);
2614 else
2615 sd_config_discard(sdkp, SD_LBP_DISABLE);
2616 }
e339c1a7
MP		 2617 }
2618
e3deec09 2619 out:
d11b6916
MP		 2620 kfree(buffer);
2621}
2622
3821d768
MP		 2623/**
2624 * sd_read_block_characteristics - Query block dev. characteristics
2625 * @disk: disk to query
2626 */
2627static void sd_read_block_characteristics(struct scsi_disk *sdkp)
2628{
e3deec09 2629 unsigned char *buffer;
3821d768 2630 u16 rot;
bb2d3de1 2631 const int vpd_len = 64;
3821d768 2632
e3deec09 2633 buffer = kmalloc(vpd_len, GFP_KERNEL);
3821d768 2634
e3deec09
JB		 2635 if (!buffer ||
2636 /* Block Device Characteristics VPD */
2637 scsi_get_vpd_page(sdkp->device, 0xb1, buffer, vpd_len))
2638 goto out;
3821d768
MP		 2639
2640 rot = get_unaligned_be16(&buffer[4]);
2641
2642 if (rot == 1)
2643 queue_flag_set_unlocked(QUEUE_FLAG_NONROT, sdkp->disk->queue);
2644
e3deec09 2645 out:
3821d768
MP		 2646 kfree(buffer);
2647}
2648
045d3fe7 2649/**
c98a0eb0 2650 * sd_read_block_provisioning - Query provisioning VPD page
045d3fe7
MP		 2651 * @disk: disk to query
2652 */
c98a0eb0 2653static void sd_read_block_provisioning(struct scsi_disk *sdkp)
045d3fe7
MP		 2654{
2655 unsigned char *buffer;
2656 const int vpd_len = 8;
2657
c98a0eb0 2658 if (sdkp->lbpme == 0)
045d3fe7
MP		 2659 return;
2660
2661 buffer = kmalloc(vpd_len, GFP_KERNEL);
2662
2663 if (!buffer || scsi_get_vpd_page(sdkp->device, 0xb2, buffer, vpd_len))
2664 goto out;
2665
c98a0eb0
MP		 2666 sdkp->lbpvpd = 1;
2667 sdkp->lbpu = (buffer[5] >> 7) & 1; /* UNMAP */
2668 sdkp->lbpws = (buffer[5] >> 6) & 1; /* WRITE SAME(16) with UNMAP */
2669 sdkp->lbpws10 = (buffer[5] >> 5) & 1; /* WRITE SAME(10) with UNMAP */
045d3fe7
MP		 2670
2671 out:
2672 kfree(buffer);
2673}
2674
5db44863
MP		 2675static void sd_read_write_same(struct scsi_disk *sdkp, unsigned char *buffer)
2676{
66c28f97
MP		 2677 struct scsi_device *sdev = sdkp->device;
2678
54b2b50c
MP		 2679 if (sdev->host->no_write_same) {
2680 sdev->no_write_same = 1;
2681
2682 return;
2683 }
2684
66c28f97 2685 if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, INQUIRY) < 0) {
af73623f
BS		 2686 /* too large values might cause issues with arcmsr */
2687 int vpd_buf_len = 64;
2688
66c28f97
MP		 2689 sdev->no_report_opcodes = 1;
2690
2691 /* Disable WRITE SAME if REPORT SUPPORTED OPERATION
2692 * CODES is unsupported and the device has an ATA
2693 * Information VPD page (SAT).
2694 */
af73623f 2695 if (!scsi_get_vpd_page(sdev, 0x89, buffer, vpd_buf_len))
66c28f97
MP		 2696 sdev->no_write_same = 1;
2697 }
2698
2699 if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME_16) == 1)
5db44863 2700 sdkp->ws16 = 1;
66c28f97
MP		 2701
2702 if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME) == 1)
2703 sdkp->ws10 = 1;
5db44863
MP		 2704}
2705
ffd4bc2a
MP		 2706static int sd_try_extended_inquiry(struct scsi_device *sdp)
2707{
2708 /*
2709 * Although VPD inquiries can go to SCSI-2 type devices,
2710 * some USB ones crash on receiving them, and the pages
2711 * we currently ask for are for SPC-3 and beyond
2712 */
09b6b51b 2713 if (sdp->scsi_level > SCSI_SPC_2 && !sdp->skip_vpd_pages)
ffd4bc2a
MP		 2714 return 1;
2715 return 0;
2716}
2717
1da177e4
LT		 2718/**
2719 * sd_revalidate_disk - called the first time a new disk is seen,
2720 * performs disk spin up, read_capacity, etc.
2721 * @disk: struct gendisk we care about
2722 **/
2723static int sd_revalidate_disk(struct gendisk *disk)
2724{
2725 struct scsi_disk *sdkp = scsi_disk(disk);
2726 struct scsi_device *sdp = sdkp->device;
1da177e4 2727 unsigned char *buffer;
bcdb247c 2728 unsigned int max_xfer;
1da177e4 2729
fa0d34be
MP		 2730 SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp,
2731 "sd_revalidate_disk\n"));
1da177e4
LT		 2732
2733 /*
2734 * If the device is offline, don't try and read capacity or any
2735 * of the other niceties.
2736 */
2737 if (!scsi_device_online(sdp))
2738 goto out;
2739
a6123f14 2740 buffer = kmalloc(SD_BUF_SIZE, GFP_KERNEL);
1da177e4 2741 if (!buffer) {
e73aec82
MP		 2742 sd_printk(KERN_WARNING, sdkp, "sd_revalidate_disk: Memory "
2743 "allocation failure.\n");
ea73a9f2 2744 goto out;
1da177e4
LT		 2745 }
2746
e73aec82 2747 sd_spinup_disk(sdkp);
1da177e4
LT		 2748
2749 /*
2750 * Without media there is no reason to ask; moreover, some devices
2751 * react badly if we do.
2752 */
2753 if (sdkp->media_present) {
e73aec82 2754 sd_read_capacity(sdkp, buffer);
ffd4bc2a
MP		 2755
2756 if (sd_try_extended_inquiry(sdp)) {
c98a0eb0 2757 sd_read_block_provisioning(sdkp);
ffd4bc2a
MP		 2758 sd_read_block_limits(sdkp);
2759 sd_read_block_characteristics(sdkp);
2760 }
2761
e73aec82
MP		 2762 sd_read_write_protect_flag(sdkp, buffer);
2763 sd_read_cache_type(sdkp, buffer);
e0597d70 2764 sd_read_app_tag_own(sdkp, buffer);
5db44863 2765 sd_read_write_same(sdkp, buffer);
1da177e4 2766 }
461d4e90 2767
70a9b873
MP		 2768 sdkp->first_scan = 0;
2769
461d4e90
TH		 2770 /*
2771 * We now have all cache related info, determine how we deal
4913efe4 2772 * with flush requests.
461d4e90 2773 */
cb2fb68d 2774 sd_set_flush_flag(sdkp);
461d4e90 2775
bcdb247c
MP		 2776 max_xfer = min_not_zero(queue_max_hw_sectors(sdkp->disk->queue),
2777 sdkp->max_xfer_blocks);
2778 max_xfer <<= ilog2(sdp->sector_size) - 9;
2779 blk_queue_max_hw_sectors(sdkp->disk->queue, max_xfer);
1da177e4 2780 set_capacity(disk, sdkp->capacity);
5db44863 2781 sd_config_write_same(sdkp);
1da177e4
LT		 2782 kfree(buffer);
2783
1da177e4
LT		 2784 out:
2785 return 0;
2786}
2787
72ec24bd
TH		 2788/**
2789 * sd_unlock_native_capacity - unlock native capacity
2790 * @disk: struct gendisk to set capacity for
2791 *
2792 * Block layer calls this function if it detects that partitions
2793 * on @disk reach beyond the end of the device. If the SCSI host
2794 * implements ->unlock_native_capacity() method, it's invoked to
2795 * give it a chance to adjust the device capacity.
2796 *
2797 * CONTEXT:
2798 * Defined by block layer. Might sleep.
2799 */
2800static void sd_unlock_native_capacity(struct gendisk *disk)
2801{
2802 struct scsi_device *sdev = scsi_disk(disk)->device;
2803
2804 if (sdev->host->hostt->unlock_native_capacity)
2805 sdev->host->hostt->unlock_native_capacity(sdev);
2806}
2807
3e1a7ff8
TH		 2808/**
2809 * sd_format_disk_name - format disk name
2810 * @prefix: name prefix - ie. "sd" for SCSI disks
2811 * @index: index of the disk to format name for
2812 * @buf: output buffer
2813 * @buflen: length of the output buffer
2814 *
2815 * SCSI disk names starts at sda. The 26th device is sdz and the
2816 * 27th is sdaa. The last one for two lettered suffix is sdzz
2817 * which is followed by sdaaa.
2818 *
2819 * This is basically 26 base counting with one extra 'nil' entry
3ad2f3fb 2820 * at the beginning from the second digit on and can be
3e1a7ff8
TH		 2821 * determined using similar method as 26 base conversion with the
2822 * index shifted -1 after each digit is computed.
2823 *
2824 * CONTEXT:
2825 * Don't care.
2826 *
2827 * RETURNS:
2828 * 0 on success, -errno on failure.
2829 */
2830static int sd_format_disk_name(char *prefix, int index, char *buf, int buflen)
2831{
2832 const int base = 'z' - 'a' + 1;
2833 char *begin = buf + strlen(prefix);
2834 char *end = buf + buflen;
2835 char *p;
2836 int unit;
2837
2838 p = end - 1;
2839 *p = '\0';
2840 unit = base;
2841 do {
2842 if (p == begin)
2843 return -EINVAL;
2844 *--p = 'a' + (index % unit);
2845 index = (index / unit) - 1;
2846 } while (index >= 0);
2847
2848 memmove(begin, p, end - p);
2849 memcpy(buf, prefix, strlen(prefix));
2850
2851 return 0;
2852}
2853
4ace92fc
AV		 2854/*
2855 * The asynchronous part of sd_probe
2856 */
2857static void sd_probe_async(void *data, async_cookie_t cookie)
2858{
2859 struct scsi_disk *sdkp = data;
2860 struct scsi_device *sdp;
2861 struct gendisk *gd;
2862 u32 index;
2863 struct device *dev;
2864
2865 sdp = sdkp->device;
2866 gd = sdkp->disk;
2867 index = sdkp->index;
2868 dev = &sdp->sdev_gendev;
2869
1a03ae0f
MR		 2870 gd->major = sd_major((index & 0xf0) >> 4);
2871 gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00);
2872 gd->minors = SD_MINORS;
2873
4ace92fc
AV		 2874 gd->fops = &sd_fops;
2875 gd->private_data = &sdkp->driver;
2876 gd->queue = sdkp->device->request_queue;
2877
70a9b873
MP		 2878 /* defaults, until the device tells us otherwise */
2879 sdp->sector_size = 512;
2880 sdkp->capacity = 0;
2881 sdkp->media_present = 1;
2882 sdkp->write_prot = 0;
39c60a09 2883 sdkp->cache_override = 0;
70a9b873
MP		 2884 sdkp->WCE = 0;
2885 sdkp->RCD = 0;
2886 sdkp->ATO = 0;
2887 sdkp->first_scan = 1;
18a4d0a2 2888 sdkp->max_medium_access_timeouts = SD_MAX_MEDIUM_TIMEOUTS;
70a9b873 2889
4ace92fc
AV		 2890 sd_revalidate_disk(gd);
2891
4ace92fc 2892 gd->driverfs_dev = &sdp->sdev_gendev;
97fedbbe 2893 gd->flags = GENHD_FL_EXT_DEVT;
2bae0093 2894 if (sdp->removable) {
4ace92fc 2895 gd->flags |= GENHD_FL_REMOVABLE;
2bae0093
TH		 2896 gd->events |= DISK_EVENT_MEDIA_CHANGE;
2897 }
4ace92fc 2898
10c580e4 2899 blk_pm_runtime_init(sdp->request_queue, dev);
4ace92fc 2900 add_disk(gd);
fe542396
MP		 2901 if (sdkp->capacity)
2902 sd_dif_config_host(sdkp);
4ace92fc 2903
3821d768
MP		 2904 sd_revalidate_disk(gd);
2905
4ace92fc
AV		 2906 sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n",
2907 sdp->removable ? "removable " : "");
478a8a05 2908 scsi_autopm_put_device(sdp);
ea038f63 2909 put_device(&sdkp->dev);
4ace92fc
AV		 2910}
2911
1da177e4
LT		 2912/**
2913 * sd_probe - called during driver initialization and whenever a
2914 * new scsi device is attached to the system. It is called once
2915 * for each scsi device (not just disks) present.
2916 * @dev: pointer to device object
2917 *
2918 * Returns 0 if successful (or not interested in this scsi device
2919 * (e.g. scanner)); 1 when there is an error.
2920 *
2921 * Note: this function is invoked from the scsi mid-level.
2922 * This function sets up the mapping between a given
2923 * <host,channel,id,lun> (found in sdp) and new device name
2924 * (e.g. /dev/sda). More precisely it is the block device major
2925 * and minor number that is chosen here.
2926 *
2db93ce8
PU		 2927 * Assume sd_probe is not re-entrant (for time being)
2928 * Also think about sd_probe() and sd_remove() running coincidentally.
1da177e4
LT		 2929 **/
2930static int sd_probe(struct device *dev)
2931{
2932 struct scsi_device *sdp = to_scsi_device(dev);
2933 struct scsi_disk *sdkp;
2934 struct gendisk *gd;
439d77f7 2935 int index;
1da177e4
LT		 2936 int error;
2937
2938 error = -ENODEV;
631e8a13 2939 if (sdp->type != TYPE_DISK && sdp->type != TYPE_MOD && sdp->type != TYPE_RBC)
1da177e4
LT		 2940 goto out;
2941
9ccfc756 2942 SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO, sdp,
2db93ce8 2943 "sd_probe\n"));
1da177e4
LT		 2944
2945 error = -ENOMEM;
24669f75 2946 sdkp = kzalloc(sizeof(*sdkp), GFP_KERNEL);
1da177e4
LT		 2947 if (!sdkp)
2948 goto out;
2949
689d6fac 2950 gd = alloc_disk(SD_MINORS);
1da177e4
LT		 2951 if (!gd)
2952 goto out_free;
2953
f27bac27
TH		 2954 do {
2955 if (!ida_pre_get(&sd_index_ida, GFP_KERNEL))
2956 goto out_put;
1da177e4 2957
4034cc68 2958 spin_lock(&sd_index_lock);
f27bac27 2959 error = ida_get_new(&sd_index_ida, &index);
4034cc68 2960 spin_unlock(&sd_index_lock);
f27bac27 2961 } while (error == -EAGAIN);
1da177e4 2962
21208ae5
DK		 2963 if (error) {
2964 sdev_printk(KERN_WARNING, sdp, "sd_probe: memory exhausted.\n");
1da177e4 2965 goto out_put;
1a03ae0f
MR		 2966 }
2967
3e1a7ff8 2968 error = sd_format_disk_name("sd", index, gd->disk_name, DISK_NAME_LEN);
21208ae5
DK		 2969 if (error) {
2970 sdev_printk(KERN_WARNING, sdp, "SCSI disk (sd) name length exceeded.\n");
f27bac27 2971 goto out_free_index;
21208ae5 2972 }
f27bac27 2973
1da177e4
LT		 2974 sdkp->device = sdp;
2975 sdkp->driver = &sd_template;
2976 sdkp->disk = gd;
2977 sdkp->index = index;
409f3499 2978 atomic_set(&sdkp->openers, 0);
9e1a1537 2979 atomic_set(&sdkp->device->ioerr_cnt, 0);
1da177e4 2980
601e7638
JB		 2981 if (!sdp->request_queue->rq_timeout) {
2982 if (sdp->type != TYPE_MOD)
2983 blk_queue_rq_timeout(sdp->request_queue, SD_TIMEOUT);
2984 else
2985 blk_queue_rq_timeout(sdp->request_queue,
2986 SD_MOD_TIMEOUT);
2987 }
2988
2989 device_initialize(&sdkp->dev);
478a8a05 2990 sdkp->dev.parent = dev;
601e7638 2991 sdkp->dev.class = &sd_disk_class;
02aa2a37 2992 dev_set_name(&sdkp->dev, "%s", dev_name(dev));
601e7638
JB		 2993
2994 if (device_add(&sdkp->dev))
2995 goto out_free_index;
2996
478a8a05
AS		 2997 get_device(dev);
2998 dev_set_drvdata(dev, sdkp);
601e7638 2999
ea038f63 3000 get_device(&sdkp->dev); /* prevent release before async_schedule */
a7a20d10 3001 async_schedule_domain(sd_probe_async, sdkp, &scsi_sd_probe_domain);
1da177e4
LT		 3002
3003 return 0;
3004
f27bac27 3005 out_free_index:
4034cc68 3006 spin_lock(&sd_index_lock);
f27bac27 3007 ida_remove(&sd_index_ida, index);
4034cc68 3008 spin_unlock(&sd_index_lock);
6bdaa1f1 3009 out_put:
1da177e4 3010 put_disk(gd);
6bdaa1f1 3011 out_free:
1da177e4 3012 kfree(sdkp);
6bdaa1f1 3013 out:
1da177e4
LT		 3014 return error;
3015}
3016
3017/**
3018 * sd_remove - called whenever a scsi disk (previously recognized by
3019 * sd_probe) is detached from the system. It is called (potentially
3020 * multiple times) during sd module unload.
3021 * @sdp: pointer to mid level scsi device object
3022 *
3023 * Note: this function is invoked from the scsi mid-level.
3024 * This function potentially frees up a device name (e.g. /dev/sdc)
3025 * that could be re-used by a subsequent sd_probe().
3026 * This function is not called when the built-in sd driver is "exit-ed".
3027 **/
3028static int sd_remove(struct device *dev)
3029{
601e7638 3030 struct scsi_disk *sdkp;
0761df9c 3031 dev_t devt;
1da177e4 3032
601e7638 3033 sdkp = dev_get_drvdata(dev);
0761df9c 3034 devt = disk_devt(sdkp->disk);
478a8a05
AS		 3035 scsi_autopm_get_device(sdkp->device);
3036
3c31b52f 3037 async_synchronize_full_domain(&scsi_sd_pm_domain);
a7a20d10 3038 async_synchronize_full_domain(&scsi_sd_probe_domain);
ee959b00 3039 device_del(&sdkp->dev);
1da177e4
LT		 3040 del_gendisk(sdkp->disk);
3041 sd_shutdown(dev);
39b7f1e2 3042
0761df9c
HR		 3043 blk_register_region(devt, SD_MINORS, NULL,
3044 sd_default_probe, NULL, NULL);
3045
0b950672 3046 mutex_lock(&sd_ref_mutex);
39b7f1e2 3047 dev_set_drvdata(dev, NULL);
ee959b00 3048 put_device(&sdkp->dev);
0b950672 3049 mutex_unlock(&sd_ref_mutex);
1da177e4
LT		 3050
3051 return 0;
3052}
3053
3054/**
3055 * scsi_disk_release - Called to free the scsi_disk structure
ee959b00 3056 * @dev: pointer to embedded class device
1da177e4 3057 *
0b950672 3058 * sd_ref_mutex must be held entering this routine. Because it is
1da177e4
LT		 3059 * called on last put, you should always use the scsi_disk_get()
3060 * scsi_disk_put() helpers which manipulate the semaphore directly
ee959b00 3061 * and never do a direct put_device.
1da177e4 3062 **/
ee959b00 3063static void scsi_disk_release(struct device *dev)
1da177e4 3064{
ee959b00 3065 struct scsi_disk *sdkp = to_scsi_disk(dev);
1da177e4
LT		 3066 struct gendisk *disk = sdkp->disk;
3067
4034cc68 3068 spin_lock(&sd_index_lock);
f27bac27 3069 ida_remove(&sd_index_ida, sdkp->index);
4034cc68 3070 spin_unlock(&sd_index_lock);
1da177e4
LT		 3071
3072 disk->private_data = NULL;
1da177e4 3073 put_disk(disk);
39b7f1e2 3074 put_device(&sdkp->device->sdev_gendev);
1da177e4
LT		 3075
3076 kfree(sdkp);
3077}
3078
cc5d2c8c 3079static int sd_start_stop_device(struct scsi_disk *sdkp, int start)
c3c94c5a
TH		 3080{
3081 unsigned char cmd[6] = { START_STOP }; /* START_VALID */
3082 struct scsi_sense_hdr sshdr;
cc5d2c8c 3083 struct scsi_device *sdp = sdkp->device;
c3c94c5a
TH		 3084 int res;
3085
3086 if (start)
3087 cmd[4] |= 1; /* START */
3088
d2886ea3
SR		 3089 if (sdp->start_stop_pwr_cond)
3090 cmd[4] |= start ? 1 << 4 : 3 << 4; /* Active or Standby */
3091
c3c94c5a
TH		 3092 if (!scsi_device_online(sdp))
3093 return -ENODEV;
3094
9b21493c
LM		 3095 res = scsi_execute_req_flags(sdp, cmd, DMA_NONE, NULL, 0, &sshdr,
3096 SD_TIMEOUT, SD_MAX_RETRIES, NULL, REQ_PM);
c3c94c5a 3097 if (res) {
cc5d2c8c
JB		 3098 sd_printk(KERN_WARNING, sdkp, "START_STOP FAILED\n");
3099 sd_print_result(sdkp, res);
c3c94c5a 3100 if (driver_byte(res) & DRIVER_SENSE)
cc5d2c8c 3101 sd_print_sense_hdr(sdkp, &sshdr);
95897910
ON		 3102 if (scsi_sense_valid(&sshdr) &&
3103 /* 0x3a is medium not present */
3104 sshdr.asc == 0x3a)
3105 res = 0;
c3c94c5a
TH		 3106 }
3107
95897910
ON		 3108 /* SCSI error codes must not go to the generic layer */
3109 if (res)
3110 return -EIO;
3111
3112 return 0;
c3c94c5a
TH		 3113}
3114
1da177e4
LT		 3115/*
3116 * Send a SYNCHRONIZE CACHE instruction down to the device through
3117 * the normal SCSI command structure. Wait for the command to
3118 * complete.
3119 */
3120static void sd_shutdown(struct device *dev)
3121{
39b7f1e2 3122 struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev);
1da177e4
LT		 3123
3124 if (!sdkp)
3125 return; /* this can happen */
3126
54f57588
LM		 3127 if (pm_runtime_suspended(dev))
3128 goto exit;
3129
95897910 3130 if (sdkp->WCE && sdkp->media_present) {
e73aec82
MP		 3131 sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n");
3132 sd_sync_cache(sdkp);
39b7f1e2 3133 }
c3c94c5a 3134
cc5d2c8c
JB		 3135 if (system_state != SYSTEM_RESTART && sdkp->device->manage_start_stop) {
3136 sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n");
3137 sd_start_stop_device(sdkp, 0);
c3c94c5a
TH		 3138 }
3139
54f57588 3140exit:
39b7f1e2
AS		 3141 scsi_disk_put(sdkp);
3142}
1da177e4 3143
95897910 3144static int sd_suspend_common(struct device *dev, bool ignore_stop_errors)
c3c94c5a 3145{
c3c94c5a 3146 struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev);
09ff92fe 3147 int ret = 0;
c3c94c5a
TH		 3148
3149 if (!sdkp)
3150 return 0; /* this can happen */
3151
95897910 3152 if (sdkp->WCE && sdkp->media_present) {
cc5d2c8c 3153 sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n");
c3c94c5a 3154 ret = sd_sync_cache(sdkp);
95897910
ON		 3155 if (ret) {
3156 /* ignore OFFLINE device */
3157 if (ret == -ENODEV)
3158 ret = 0;
09ff92fe 3159 goto done;
95897910 3160 }
c3c94c5a
TH		 3161 }
3162
691e3d31 3163 if (sdkp->device->manage_start_stop) {
cc5d2c8c 3164 sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n");
95897910 3165 /* an error is not worth aborting a system sleep */
cc5d2c8c 3166 ret = sd_start_stop_device(sdkp, 0);
95897910
ON		 3167 if (ignore_stop_errors)
3168 ret = 0;
c3c94c5a
TH		 3169 }
3170
09ff92fe
AS		 3171done:
3172 scsi_disk_put(sdkp);
3173 return ret;
c3c94c5a
TH		 3174}
3175
95897910
ON		 3176static int sd_suspend_system(struct device *dev)
3177{
3178 return sd_suspend_common(dev, true);
3179}
3180
3181static int sd_suspend_runtime(struct device *dev)
3182{
3183 return sd_suspend_common(dev, false);
3184}
3185
c3c94c5a
TH		 3186static int sd_resume(struct device *dev)
3187{
c3c94c5a 3188 struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev);
09ff92fe 3189 int ret = 0;
c3c94c5a 3190
cc5d2c8c 3191 if (!sdkp->device->manage_start_stop)
09ff92fe 3192 goto done;
c3c94c5a 3193
cc5d2c8c 3194 sd_printk(KERN_NOTICE, sdkp, "Starting disk\n");
09ff92fe 3195 ret = sd_start_stop_device(sdkp, 1);
c3c94c5a 3196
09ff92fe
AS		 3197done:
3198 scsi_disk_put(sdkp);
3199 return ret;
c3c94c5a
TH		 3200}
3201
1da177e4
LT		 3202/**
3203 * init_sd - entry point for this driver (both when built in or when
3204 * a module).
3205 *
3206 * Note: this function registers this driver with the scsi mid-level.
3207 **/
3208static int __init init_sd(void)
3209{
5e4009ba 3210 int majors = 0, i, err;
1da177e4
LT		 3211
3212 SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n"));
3213
0761df9c
HR		 3214 for (i = 0; i < SD_MAJORS; i++) {
3215 if (register_blkdev(sd_major(i), "sd") != 0)
3216 continue;
3217 majors++;
3218 blk_register_region(sd_major(i), SD_MINORS, NULL,
3219 sd_default_probe, NULL, NULL);
3220 }
1da177e4
LT		 3221
3222 if (!majors)
3223 return -ENODEV;
3224
5e4009ba
JG		 3225 err = class_register(&sd_disk_class);
3226 if (err)
3227 goto err_out;
6bdaa1f1 3228
4e7392ec
MP		 3229 sd_cdb_cache = kmem_cache_create("sd_ext_cdb", SD_EXT_CDB_SIZE,
3230 0, 0, NULL);
3231 if (!sd_cdb_cache) {
3232 printk(KERN_ERR "sd: can't init extended cdb cache\n");
8d964478 3233 err = -ENOMEM;
4e7392ec
MP		 3234 goto err_out_class;
3235 }
3236
3237 sd_cdb_pool = mempool_create_slab_pool(SD_MEMPOOL_SIZE, sd_cdb_cache);
3238 if (!sd_cdb_pool) {
3239 printk(KERN_ERR "sd: can't init extended cdb pool\n");
8d964478 3240 err = -ENOMEM;
4e7392ec
MP		 3241 goto err_out_cache;
3242 }
3243
afd5e34b
JD		 3244 err = scsi_register_driver(&sd_template.gendrv);
3245 if (err)
3246 goto err_out_driver;
3247
5e4009ba
JG		 3248 return 0;
3249
afd5e34b
JD		 3250err_out_driver:
3251 mempool_destroy(sd_cdb_pool);
3252
4e7392ec
MP		 3253err_out_cache:
3254 kmem_cache_destroy(sd_cdb_cache);
3255
5e4009ba
JG		 3256err_out_class:
3257 class_unregister(&sd_disk_class);
3258err_out:
3259 for (i = 0; i < SD_MAJORS; i++)
3260 unregister_blkdev(sd_major(i), "sd");
3261 return err;
1da177e4
LT		 3262}
3263
3264/**
3265 * exit_sd - exit point for this driver (when it is a module).
3266 *
3267 * Note: this function unregisters this driver from the scsi mid-level.
3268 **/
3269static void __exit exit_sd(void)
3270{
3271 int i;
3272
3273 SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n"));
3274
afd5e34b 3275 scsi_unregister_driver(&sd_template.gendrv);
4e7392ec
MP		 3276 mempool_destroy(sd_cdb_pool);
3277 kmem_cache_destroy(sd_cdb_cache);
3278
5e4009ba
JG		 3279 class_unregister(&sd_disk_class);
3280
0761df9c
HR		 3281 for (i = 0; i < SD_MAJORS; i++) {
3282 blk_unregister_region(sd_major(i), SD_MINORS);
1da177e4 3283 unregister_blkdev(sd_major(i), "sd");
0761df9c 3284 }
1da177e4
LT		 3285}
3286
1da177e4
LT		 3287module_init(init_sd);
3288module_exit(exit_sd);
e73aec82
MP		 3289
3290static void sd_print_sense_hdr(struct scsi_disk *sdkp,
3291 struct scsi_sense_hdr *sshdr)
3292{
2e4c3329 3293 sd_printk(KERN_INFO, sdkp, " ");
e73aec82 3294 scsi_show_sense_hdr(sshdr);
2e4c3329 3295 sd_printk(KERN_INFO, sdkp, " ");
e73aec82
MP		 3296 scsi_show_extd_sense(sshdr->asc, sshdr->ascq);
3297}
3298
3299static void sd_print_result(struct scsi_disk *sdkp, int result)
3300{
2e4c3329 3301 sd_printk(KERN_INFO, sdkp, " ");
e73aec82
MP		 3302 scsi_show_result(result);
3303}
3304
Linux kernel - Deliverables
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