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1da177e4 LT |
1 | /* |
2 | * sd.c Copyright (C) 1992 Drew Eckhardt | |
3 | * Copyright (C) 1993, 1994, 1995, 1999 Eric Youngdale | |
4 | * | |
5 | * Linux scsi disk driver | |
6 | * Initial versions: Drew Eckhardt | |
7 | * Subsequent revisions: Eric Youngdale | |
8 | * Modification history: | |
9 | * - Drew Eckhardt <drew@colorado.edu> original | |
10 | * - Eric Youngdale <eric@andante.org> add scatter-gather, multiple | |
11 | * outstanding request, and other enhancements. | |
12 | * Support loadable low-level scsi drivers. | |
13 | * - Jirka Hanika <geo@ff.cuni.cz> support more scsi disks using | |
14 | * eight major numbers. | |
15 | * - Richard Gooch <rgooch@atnf.csiro.au> support devfs. | |
16 | * - Torben Mathiasen <tmm@image.dk> Resource allocation fixes in | |
17 | * sd_init and cleanups. | |
18 | * - Alex Davis <letmein@erols.com> Fix problem where partition info | |
19 | * not being read in sd_open. Fix problem where removable media | |
20 | * could be ejected after sd_open. | |
21 | * - Douglas Gilbert <dgilbert@interlog.com> cleanup for lk 2.5.x | |
22 | * - Badari Pulavarty <pbadari@us.ibm.com>, Matthew Wilcox | |
23 | * <willy@debian.org>, Kurt Garloff <garloff@suse.de>: | |
24 | * Support 32k/1M disks. | |
25 | * | |
26 | * Logging policy (needs CONFIG_SCSI_LOGGING defined): | |
27 | * - setting up transfer: SCSI_LOG_HLQUEUE levels 1 and 2 | |
28 | * - end of transfer (bh + scsi_lib): SCSI_LOG_HLCOMPLETE level 1 | |
29 | * - entering sd_ioctl: SCSI_LOG_IOCTL level 1 | |
30 | * - entering other commands: SCSI_LOG_HLQUEUE level 3 | |
31 | * Note: when the logging level is set by the user, it must be greater | |
32 | * than the level indicated above to trigger output. | |
33 | */ | |
34 | ||
1da177e4 LT |
35 | #include <linux/module.h> |
36 | #include <linux/fs.h> | |
37 | #include <linux/kernel.h> | |
1da177e4 LT |
38 | #include <linux/mm.h> |
39 | #include <linux/bio.h> | |
40 | #include <linux/genhd.h> | |
41 | #include <linux/hdreg.h> | |
42 | #include <linux/errno.h> | |
43 | #include <linux/idr.h> | |
44 | #include <linux/interrupt.h> | |
45 | #include <linux/init.h> | |
46 | #include <linux/blkdev.h> | |
47 | #include <linux/blkpg.h> | |
1da177e4 | 48 | #include <linux/delay.h> |
0b950672 | 49 | #include <linux/mutex.h> |
1da177e4 LT |
50 | #include <asm/uaccess.h> |
51 | ||
52 | #include <scsi/scsi.h> | |
53 | #include <scsi/scsi_cmnd.h> | |
54 | #include <scsi/scsi_dbg.h> | |
55 | #include <scsi/scsi_device.h> | |
56 | #include <scsi/scsi_driver.h> | |
57 | #include <scsi/scsi_eh.h> | |
58 | #include <scsi/scsi_host.h> | |
59 | #include <scsi/scsi_ioctl.h> | |
1da177e4 LT |
60 | #include <scsi/scsicam.h> |
61 | ||
aa91696e | 62 | #include "sd.h" |
1da177e4 LT |
63 | #include "scsi_logging.h" |
64 | ||
f018fa55 RH |
65 | MODULE_AUTHOR("Eric Youngdale"); |
66 | MODULE_DESCRIPTION("SCSI disk (sd) driver"); | |
67 | MODULE_LICENSE("GPL"); | |
68 | ||
69 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK0_MAJOR); | |
70 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK1_MAJOR); | |
71 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK2_MAJOR); | |
72 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK3_MAJOR); | |
73 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK4_MAJOR); | |
74 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK5_MAJOR); | |
75 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK6_MAJOR); | |
76 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK7_MAJOR); | |
77 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK8_MAJOR); | |
78 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK9_MAJOR); | |
79 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK10_MAJOR); | |
80 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK11_MAJOR); | |
81 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK12_MAJOR); | |
82 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK13_MAJOR); | |
83 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK14_MAJOR); | |
84 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK15_MAJOR); | |
d7b8bcb0 MT |
85 | MODULE_ALIAS_SCSI_DEVICE(TYPE_DISK); |
86 | MODULE_ALIAS_SCSI_DEVICE(TYPE_MOD); | |
87 | MODULE_ALIAS_SCSI_DEVICE(TYPE_RBC); | |
f018fa55 | 88 | |
7b3d9545 LT |
89 | static int sd_revalidate_disk(struct gendisk *); |
90 | static int sd_probe(struct device *); | |
91 | static int sd_remove(struct device *); | |
92 | static void sd_shutdown(struct device *); | |
93 | static int sd_suspend(struct device *, pm_message_t state); | |
94 | static int sd_resume(struct device *); | |
95 | static void sd_rescan(struct device *); | |
96 | static int sd_done(struct scsi_cmnd *); | |
97 | static void sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer); | |
ee959b00 | 98 | static void scsi_disk_release(struct device *cdev); |
7b3d9545 LT |
99 | static void sd_print_sense_hdr(struct scsi_disk *, struct scsi_sense_hdr *); |
100 | static void sd_print_result(struct scsi_disk *, int); | |
101 | ||
f27bac27 | 102 | static DEFINE_IDA(sd_index_ida); |
1da177e4 LT |
103 | |
104 | /* This semaphore is used to mediate the 0->1 reference get in the | |
105 | * face of object destruction (i.e. we can't allow a get on an | |
106 | * object after last put) */ | |
0b950672 | 107 | static DEFINE_MUTEX(sd_ref_mutex); |
1da177e4 | 108 | |
6bdaa1f1 JB |
109 | static const char *sd_cache_types[] = { |
110 | "write through", "none", "write back", | |
111 | "write back, no read (daft)" | |
112 | }; | |
113 | ||
ee959b00 TJ |
114 | static ssize_t |
115 | sd_store_cache_type(struct device *dev, struct device_attribute *attr, | |
116 | const char *buf, size_t count) | |
6bdaa1f1 JB |
117 | { |
118 | int i, ct = -1, rcd, wce, sp; | |
ee959b00 | 119 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
120 | struct scsi_device *sdp = sdkp->device; |
121 | char buffer[64]; | |
122 | char *buffer_data; | |
123 | struct scsi_mode_data data; | |
124 | struct scsi_sense_hdr sshdr; | |
125 | int len; | |
126 | ||
127 | if (sdp->type != TYPE_DISK) | |
128 | /* no cache control on RBC devices; theoretically they | |
129 | * can do it, but there's probably so many exceptions | |
130 | * it's not worth the risk */ | |
131 | return -EINVAL; | |
132 | ||
6391a113 | 133 | for (i = 0; i < ARRAY_SIZE(sd_cache_types); i++) { |
6bdaa1f1 JB |
134 | const int len = strlen(sd_cache_types[i]); |
135 | if (strncmp(sd_cache_types[i], buf, len) == 0 && | |
136 | buf[len] == '\n') { | |
137 | ct = i; | |
138 | break; | |
139 | } | |
140 | } | |
141 | if (ct < 0) | |
142 | return -EINVAL; | |
143 | rcd = ct & 0x01 ? 1 : 0; | |
144 | wce = ct & 0x02 ? 1 : 0; | |
145 | if (scsi_mode_sense(sdp, 0x08, 8, buffer, sizeof(buffer), SD_TIMEOUT, | |
146 | SD_MAX_RETRIES, &data, NULL)) | |
147 | return -EINVAL; | |
a9312fb8 | 148 | len = min_t(size_t, sizeof(buffer), data.length - data.header_length - |
6bdaa1f1 JB |
149 | data.block_descriptor_length); |
150 | buffer_data = buffer + data.header_length + | |
151 | data.block_descriptor_length; | |
152 | buffer_data[2] &= ~0x05; | |
153 | buffer_data[2] |= wce << 2 | rcd; | |
154 | sp = buffer_data[0] & 0x80 ? 1 : 0; | |
155 | ||
156 | if (scsi_mode_select(sdp, 1, sp, 8, buffer_data, len, SD_TIMEOUT, | |
157 | SD_MAX_RETRIES, &data, &sshdr)) { | |
158 | if (scsi_sense_valid(&sshdr)) | |
e73aec82 | 159 | sd_print_sense_hdr(sdkp, &sshdr); |
6bdaa1f1 JB |
160 | return -EINVAL; |
161 | } | |
162 | sd_revalidate_disk(sdkp->disk); | |
163 | return count; | |
164 | } | |
165 | ||
ee959b00 TJ |
166 | static ssize_t |
167 | sd_store_manage_start_stop(struct device *dev, struct device_attribute *attr, | |
168 | const char *buf, size_t count) | |
c3c94c5a | 169 | { |
ee959b00 | 170 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
c3c94c5a TH |
171 | struct scsi_device *sdp = sdkp->device; |
172 | ||
173 | if (!capable(CAP_SYS_ADMIN)) | |
174 | return -EACCES; | |
175 | ||
176 | sdp->manage_start_stop = simple_strtoul(buf, NULL, 10); | |
177 | ||
178 | return count; | |
179 | } | |
180 | ||
ee959b00 TJ |
181 | static ssize_t |
182 | sd_store_allow_restart(struct device *dev, struct device_attribute *attr, | |
183 | const char *buf, size_t count) | |
a144c5ae | 184 | { |
ee959b00 | 185 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
a144c5ae BK |
186 | struct scsi_device *sdp = sdkp->device; |
187 | ||
188 | if (!capable(CAP_SYS_ADMIN)) | |
189 | return -EACCES; | |
190 | ||
191 | if (sdp->type != TYPE_DISK) | |
192 | return -EINVAL; | |
193 | ||
194 | sdp->allow_restart = simple_strtoul(buf, NULL, 10); | |
195 | ||
196 | return count; | |
197 | } | |
198 | ||
ee959b00 TJ |
199 | static ssize_t |
200 | sd_show_cache_type(struct device *dev, struct device_attribute *attr, | |
201 | char *buf) | |
6bdaa1f1 | 202 | { |
ee959b00 | 203 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
204 | int ct = sdkp->RCD + 2*sdkp->WCE; |
205 | ||
206 | return snprintf(buf, 40, "%s\n", sd_cache_types[ct]); | |
207 | } | |
208 | ||
ee959b00 TJ |
209 | static ssize_t |
210 | sd_show_fua(struct device *dev, struct device_attribute *attr, char *buf) | |
6bdaa1f1 | 211 | { |
ee959b00 | 212 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
213 | |
214 | return snprintf(buf, 20, "%u\n", sdkp->DPOFUA); | |
215 | } | |
216 | ||
ee959b00 TJ |
217 | static ssize_t |
218 | sd_show_manage_start_stop(struct device *dev, struct device_attribute *attr, | |
219 | char *buf) | |
c3c94c5a | 220 | { |
ee959b00 | 221 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
c3c94c5a TH |
222 | struct scsi_device *sdp = sdkp->device; |
223 | ||
224 | return snprintf(buf, 20, "%u\n", sdp->manage_start_stop); | |
225 | } | |
226 | ||
ee959b00 TJ |
227 | static ssize_t |
228 | sd_show_allow_restart(struct device *dev, struct device_attribute *attr, | |
229 | char *buf) | |
a144c5ae | 230 | { |
ee959b00 | 231 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
a144c5ae BK |
232 | |
233 | return snprintf(buf, 40, "%d\n", sdkp->device->allow_restart); | |
234 | } | |
235 | ||
e0597d70 MP |
236 | static ssize_t |
237 | sd_show_protection_type(struct device *dev, struct device_attribute *attr, | |
238 | char *buf) | |
239 | { | |
240 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
241 | ||
242 | return snprintf(buf, 20, "%u\n", sdkp->protection_type); | |
243 | } | |
244 | ||
245 | static ssize_t | |
246 | sd_show_app_tag_own(struct device *dev, struct device_attribute *attr, | |
247 | char *buf) | |
248 | { | |
249 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
250 | ||
251 | return snprintf(buf, 20, "%u\n", sdkp->ATO); | |
252 | } | |
253 | ||
ee959b00 | 254 | static struct device_attribute sd_disk_attrs[] = { |
6bdaa1f1 JB |
255 | __ATTR(cache_type, S_IRUGO|S_IWUSR, sd_show_cache_type, |
256 | sd_store_cache_type), | |
257 | __ATTR(FUA, S_IRUGO, sd_show_fua, NULL), | |
a144c5ae BK |
258 | __ATTR(allow_restart, S_IRUGO|S_IWUSR, sd_show_allow_restart, |
259 | sd_store_allow_restart), | |
c3c94c5a TH |
260 | __ATTR(manage_start_stop, S_IRUGO|S_IWUSR, sd_show_manage_start_stop, |
261 | sd_store_manage_start_stop), | |
e0597d70 MP |
262 | __ATTR(protection_type, S_IRUGO, sd_show_protection_type, NULL), |
263 | __ATTR(app_tag_own, S_IRUGO, sd_show_app_tag_own, NULL), | |
6bdaa1f1 JB |
264 | __ATTR_NULL, |
265 | }; | |
266 | ||
267 | static struct class sd_disk_class = { | |
268 | .name = "scsi_disk", | |
269 | .owner = THIS_MODULE, | |
ee959b00 TJ |
270 | .dev_release = scsi_disk_release, |
271 | .dev_attrs = sd_disk_attrs, | |
6bdaa1f1 | 272 | }; |
1da177e4 LT |
273 | |
274 | static struct scsi_driver sd_template = { | |
275 | .owner = THIS_MODULE, | |
276 | .gendrv = { | |
277 | .name = "sd", | |
278 | .probe = sd_probe, | |
279 | .remove = sd_remove, | |
c3c94c5a TH |
280 | .suspend = sd_suspend, |
281 | .resume = sd_resume, | |
1da177e4 LT |
282 | .shutdown = sd_shutdown, |
283 | }, | |
284 | .rescan = sd_rescan, | |
7b3d9545 | 285 | .done = sd_done, |
1da177e4 LT |
286 | }; |
287 | ||
288 | /* | |
289 | * Device no to disk mapping: | |
290 | * | |
291 | * major disc2 disc p1 | |
292 | * |............|.............|....|....| <- dev_t | |
293 | * 31 20 19 8 7 4 3 0 | |
294 | * | |
295 | * Inside a major, we have 16k disks, however mapped non- | |
296 | * contiguously. The first 16 disks are for major0, the next | |
297 | * ones with major1, ... Disk 256 is for major0 again, disk 272 | |
298 | * for major1, ... | |
299 | * As we stay compatible with our numbering scheme, we can reuse | |
300 | * the well-know SCSI majors 8, 65--71, 136--143. | |
301 | */ | |
302 | static int sd_major(int major_idx) | |
303 | { | |
304 | switch (major_idx) { | |
305 | case 0: | |
306 | return SCSI_DISK0_MAJOR; | |
307 | case 1 ... 7: | |
308 | return SCSI_DISK1_MAJOR + major_idx - 1; | |
309 | case 8 ... 15: | |
310 | return SCSI_DISK8_MAJOR + major_idx - 8; | |
311 | default: | |
312 | BUG(); | |
313 | return 0; /* shut up gcc */ | |
314 | } | |
315 | } | |
316 | ||
39b7f1e2 | 317 | static struct scsi_disk *__scsi_disk_get(struct gendisk *disk) |
1da177e4 LT |
318 | { |
319 | struct scsi_disk *sdkp = NULL; | |
320 | ||
39b7f1e2 AS |
321 | if (disk->private_data) { |
322 | sdkp = scsi_disk(disk); | |
323 | if (scsi_device_get(sdkp->device) == 0) | |
ee959b00 | 324 | get_device(&sdkp->dev); |
39b7f1e2 AS |
325 | else |
326 | sdkp = NULL; | |
327 | } | |
328 | return sdkp; | |
329 | } | |
330 | ||
331 | static struct scsi_disk *scsi_disk_get(struct gendisk *disk) | |
332 | { | |
333 | struct scsi_disk *sdkp; | |
334 | ||
0b950672 | 335 | mutex_lock(&sd_ref_mutex); |
39b7f1e2 | 336 | sdkp = __scsi_disk_get(disk); |
0b950672 | 337 | mutex_unlock(&sd_ref_mutex); |
1da177e4 | 338 | return sdkp; |
39b7f1e2 | 339 | } |
1da177e4 | 340 | |
39b7f1e2 AS |
341 | static struct scsi_disk *scsi_disk_get_from_dev(struct device *dev) |
342 | { | |
343 | struct scsi_disk *sdkp; | |
344 | ||
0b950672 | 345 | mutex_lock(&sd_ref_mutex); |
39b7f1e2 AS |
346 | sdkp = dev_get_drvdata(dev); |
347 | if (sdkp) | |
348 | sdkp = __scsi_disk_get(sdkp->disk); | |
0b950672 | 349 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
350 | return sdkp; |
351 | } | |
352 | ||
353 | static void scsi_disk_put(struct scsi_disk *sdkp) | |
354 | { | |
355 | struct scsi_device *sdev = sdkp->device; | |
356 | ||
0b950672 | 357 | mutex_lock(&sd_ref_mutex); |
ee959b00 | 358 | put_device(&sdkp->dev); |
1da177e4 | 359 | scsi_device_put(sdev); |
0b950672 | 360 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
361 | } |
362 | ||
363 | /** | |
364 | * sd_init_command - build a scsi (read or write) command from | |
365 | * information in the request structure. | |
366 | * @SCpnt: pointer to mid-level's per scsi command structure that | |
367 | * contains request and into which the scsi command is written | |
368 | * | |
369 | * Returns 1 if successful and 0 if error (or cannot be done now). | |
370 | **/ | |
7f9a6bc4 | 371 | static int sd_prep_fn(struct request_queue *q, struct request *rq) |
1da177e4 | 372 | { |
7f9a6bc4 JB |
373 | struct scsi_cmnd *SCpnt; |
374 | struct scsi_device *sdp = q->queuedata; | |
776b23a0 CH |
375 | struct gendisk *disk = rq->rq_disk; |
376 | sector_t block = rq->sector; | |
7f9a6bc4 | 377 | unsigned int this_count = rq->nr_sectors; |
776b23a0 | 378 | unsigned int timeout = sdp->timeout; |
7f9a6bc4 JB |
379 | int ret; |
380 | ||
381 | if (rq->cmd_type == REQ_TYPE_BLOCK_PC) { | |
382 | ret = scsi_setup_blk_pc_cmnd(sdp, rq); | |
383 | goto out; | |
384 | } else if (rq->cmd_type != REQ_TYPE_FS) { | |
385 | ret = BLKPREP_KILL; | |
386 | goto out; | |
387 | } | |
388 | ret = scsi_setup_fs_cmnd(sdp, rq); | |
389 | if (ret != BLKPREP_OK) | |
390 | goto out; | |
391 | SCpnt = rq->special; | |
392 | ||
393 | /* from here on until we're complete, any goto out | |
394 | * is used for a killable error condition */ | |
395 | ret = BLKPREP_KILL; | |
1da177e4 | 396 | |
fa0d34be MP |
397 | SCSI_LOG_HLQUEUE(1, scmd_printk(KERN_INFO, SCpnt, |
398 | "sd_init_command: block=%llu, " | |
399 | "count=%d\n", | |
400 | (unsigned long long)block, | |
401 | this_count)); | |
1da177e4 LT |
402 | |
403 | if (!sdp || !scsi_device_online(sdp) || | |
404 | block + rq->nr_sectors > get_capacity(disk)) { | |
fa0d34be MP |
405 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
406 | "Finishing %ld sectors\n", | |
407 | rq->nr_sectors)); | |
408 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, | |
409 | "Retry with 0x%p\n", SCpnt)); | |
7f9a6bc4 | 410 | goto out; |
1da177e4 LT |
411 | } |
412 | ||
413 | if (sdp->changed) { | |
414 | /* | |
415 | * quietly refuse to do anything to a changed disc until | |
416 | * the changed bit has been reset | |
417 | */ | |
418 | /* printk("SCSI disk has been changed. Prohibiting further I/O.\n"); */ | |
7f9a6bc4 | 419 | goto out; |
1da177e4 | 420 | } |
7f9a6bc4 | 421 | |
a0899d4d HG |
422 | /* |
423 | * Some devices (some sdcards for one) don't like it if the | |
424 | * last sector gets read in a larger then 1 sector read. | |
425 | */ | |
426 | if (unlikely(sdp->last_sector_bug && | |
427 | rq->nr_sectors > sdp->sector_size / 512 && | |
428 | block + this_count == get_capacity(disk))) | |
429 | this_count -= sdp->sector_size / 512; | |
430 | ||
fa0d34be MP |
431 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, "block=%llu\n", |
432 | (unsigned long long)block)); | |
1da177e4 LT |
433 | |
434 | /* | |
435 | * If we have a 1K hardware sectorsize, prevent access to single | |
436 | * 512 byte sectors. In theory we could handle this - in fact | |
437 | * the scsi cdrom driver must be able to handle this because | |
438 | * we typically use 1K blocksizes, and cdroms typically have | |
439 | * 2K hardware sectorsizes. Of course, things are simpler | |
440 | * with the cdrom, since it is read-only. For performance | |
441 | * reasons, the filesystems should be able to handle this | |
442 | * and not force the scsi disk driver to use bounce buffers | |
443 | * for this. | |
444 | */ | |
445 | if (sdp->sector_size == 1024) { | |
446 | if ((block & 1) || (rq->nr_sectors & 1)) { | |
e73aec82 MP |
447 | scmd_printk(KERN_ERR, SCpnt, |
448 | "Bad block number requested\n"); | |
7f9a6bc4 | 449 | goto out; |
1da177e4 LT |
450 | } else { |
451 | block = block >> 1; | |
452 | this_count = this_count >> 1; | |
453 | } | |
454 | } | |
455 | if (sdp->sector_size == 2048) { | |
456 | if ((block & 3) || (rq->nr_sectors & 3)) { | |
e73aec82 MP |
457 | scmd_printk(KERN_ERR, SCpnt, |
458 | "Bad block number requested\n"); | |
7f9a6bc4 | 459 | goto out; |
1da177e4 LT |
460 | } else { |
461 | block = block >> 2; | |
462 | this_count = this_count >> 2; | |
463 | } | |
464 | } | |
465 | if (sdp->sector_size == 4096) { | |
466 | if ((block & 7) || (rq->nr_sectors & 7)) { | |
e73aec82 MP |
467 | scmd_printk(KERN_ERR, SCpnt, |
468 | "Bad block number requested\n"); | |
7f9a6bc4 | 469 | goto out; |
1da177e4 LT |
470 | } else { |
471 | block = block >> 3; | |
472 | this_count = this_count >> 3; | |
473 | } | |
474 | } | |
475 | if (rq_data_dir(rq) == WRITE) { | |
476 | if (!sdp->writeable) { | |
7f9a6bc4 | 477 | goto out; |
1da177e4 LT |
478 | } |
479 | SCpnt->cmnd[0] = WRITE_6; | |
480 | SCpnt->sc_data_direction = DMA_TO_DEVICE; | |
481 | } else if (rq_data_dir(rq) == READ) { | |
482 | SCpnt->cmnd[0] = READ_6; | |
483 | SCpnt->sc_data_direction = DMA_FROM_DEVICE; | |
484 | } else { | |
e73aec82 | 485 | scmd_printk(KERN_ERR, SCpnt, "Unknown command %x\n", rq->cmd_flags); |
7f9a6bc4 | 486 | goto out; |
1da177e4 LT |
487 | } |
488 | ||
fa0d34be MP |
489 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
490 | "%s %d/%ld 512 byte blocks.\n", | |
491 | (rq_data_dir(rq) == WRITE) ? | |
492 | "writing" : "reading", this_count, | |
493 | rq->nr_sectors)); | |
1da177e4 LT |
494 | |
495 | SCpnt->cmnd[1] = 0; | |
496 | ||
497 | if (block > 0xffffffff) { | |
498 | SCpnt->cmnd[0] += READ_16 - READ_6; | |
007365ad | 499 | SCpnt->cmnd[1] |= blk_fua_rq(rq) ? 0x8 : 0; |
1da177e4 LT |
500 | SCpnt->cmnd[2] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0; |
501 | SCpnt->cmnd[3] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0; | |
502 | SCpnt->cmnd[4] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0; | |
503 | SCpnt->cmnd[5] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0; | |
504 | SCpnt->cmnd[6] = (unsigned char) (block >> 24) & 0xff; | |
505 | SCpnt->cmnd[7] = (unsigned char) (block >> 16) & 0xff; | |
506 | SCpnt->cmnd[8] = (unsigned char) (block >> 8) & 0xff; | |
507 | SCpnt->cmnd[9] = (unsigned char) block & 0xff; | |
508 | SCpnt->cmnd[10] = (unsigned char) (this_count >> 24) & 0xff; | |
509 | SCpnt->cmnd[11] = (unsigned char) (this_count >> 16) & 0xff; | |
510 | SCpnt->cmnd[12] = (unsigned char) (this_count >> 8) & 0xff; | |
511 | SCpnt->cmnd[13] = (unsigned char) this_count & 0xff; | |
512 | SCpnt->cmnd[14] = SCpnt->cmnd[15] = 0; | |
513 | } else if ((this_count > 0xff) || (block > 0x1fffff) || | |
514 | SCpnt->device->use_10_for_rw) { | |
515 | if (this_count > 0xffff) | |
516 | this_count = 0xffff; | |
517 | ||
518 | SCpnt->cmnd[0] += READ_10 - READ_6; | |
007365ad | 519 | SCpnt->cmnd[1] |= blk_fua_rq(rq) ? 0x8 : 0; |
1da177e4 LT |
520 | SCpnt->cmnd[2] = (unsigned char) (block >> 24) & 0xff; |
521 | SCpnt->cmnd[3] = (unsigned char) (block >> 16) & 0xff; | |
522 | SCpnt->cmnd[4] = (unsigned char) (block >> 8) & 0xff; | |
523 | SCpnt->cmnd[5] = (unsigned char) block & 0xff; | |
524 | SCpnt->cmnd[6] = SCpnt->cmnd[9] = 0; | |
525 | SCpnt->cmnd[7] = (unsigned char) (this_count >> 8) & 0xff; | |
526 | SCpnt->cmnd[8] = (unsigned char) this_count & 0xff; | |
527 | } else { | |
007365ad TH |
528 | if (unlikely(blk_fua_rq(rq))) { |
529 | /* | |
530 | * This happens only if this drive failed | |
531 | * 10byte rw command with ILLEGAL_REQUEST | |
532 | * during operation and thus turned off | |
533 | * use_10_for_rw. | |
534 | */ | |
e73aec82 MP |
535 | scmd_printk(KERN_ERR, SCpnt, |
536 | "FUA write on READ/WRITE(6) drive\n"); | |
7f9a6bc4 | 537 | goto out; |
007365ad TH |
538 | } |
539 | ||
1da177e4 LT |
540 | SCpnt->cmnd[1] |= (unsigned char) ((block >> 16) & 0x1f); |
541 | SCpnt->cmnd[2] = (unsigned char) ((block >> 8) & 0xff); | |
542 | SCpnt->cmnd[3] = (unsigned char) block & 0xff; | |
543 | SCpnt->cmnd[4] = (unsigned char) this_count; | |
544 | SCpnt->cmnd[5] = 0; | |
545 | } | |
30b0c37b | 546 | SCpnt->sdb.length = this_count * sdp->sector_size; |
1da177e4 LT |
547 | |
548 | /* | |
549 | * We shouldn't disconnect in the middle of a sector, so with a dumb | |
550 | * host adapter, it's safe to assume that we can at least transfer | |
551 | * this many bytes between each connect / disconnect. | |
552 | */ | |
553 | SCpnt->transfersize = sdp->sector_size; | |
554 | SCpnt->underflow = this_count << 9; | |
555 | SCpnt->allowed = SD_MAX_RETRIES; | |
1da177e4 LT |
556 | SCpnt->timeout_per_command = timeout; |
557 | ||
1da177e4 LT |
558 | /* |
559 | * This indicates that the command is ready from our end to be | |
560 | * queued. | |
561 | */ | |
7f9a6bc4 JB |
562 | ret = BLKPREP_OK; |
563 | out: | |
564 | return scsi_prep_return(q, rq, ret); | |
1da177e4 LT |
565 | } |
566 | ||
567 | /** | |
568 | * sd_open - open a scsi disk device | |
569 | * @inode: only i_rdev member may be used | |
570 | * @filp: only f_mode and f_flags may be used | |
571 | * | |
572 | * Returns 0 if successful. Returns a negated errno value in case | |
573 | * of error. | |
574 | * | |
575 | * Note: This can be called from a user context (e.g. fsck(1) ) | |
576 | * or from within the kernel (e.g. as a result of a mount(1) ). | |
577 | * In the latter case @inode and @filp carry an abridged amount | |
578 | * of information as noted above. | |
579 | **/ | |
580 | static int sd_open(struct inode *inode, struct file *filp) | |
581 | { | |
582 | struct gendisk *disk = inode->i_bdev->bd_disk; | |
583 | struct scsi_disk *sdkp; | |
584 | struct scsi_device *sdev; | |
585 | int retval; | |
586 | ||
587 | if (!(sdkp = scsi_disk_get(disk))) | |
588 | return -ENXIO; | |
589 | ||
590 | ||
fa0d34be | 591 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_open\n")); |
1da177e4 LT |
592 | |
593 | sdev = sdkp->device; | |
594 | ||
595 | /* | |
596 | * If the device is in error recovery, wait until it is done. | |
597 | * If the device is offline, then disallow any access to it. | |
598 | */ | |
599 | retval = -ENXIO; | |
600 | if (!scsi_block_when_processing_errors(sdev)) | |
601 | goto error_out; | |
602 | ||
603 | if (sdev->removable || sdkp->write_prot) | |
604 | check_disk_change(inode->i_bdev); | |
605 | ||
606 | /* | |
607 | * If the drive is empty, just let the open fail. | |
608 | */ | |
609 | retval = -ENOMEDIUM; | |
610 | if (sdev->removable && !sdkp->media_present && | |
611 | !(filp->f_flags & O_NDELAY)) | |
612 | goto error_out; | |
613 | ||
614 | /* | |
615 | * If the device has the write protect tab set, have the open fail | |
616 | * if the user expects to be able to write to the thing. | |
617 | */ | |
618 | retval = -EROFS; | |
619 | if (sdkp->write_prot && (filp->f_mode & FMODE_WRITE)) | |
620 | goto error_out; | |
621 | ||
622 | /* | |
623 | * It is possible that the disk changing stuff resulted in | |
624 | * the device being taken offline. If this is the case, | |
625 | * report this to the user, and don't pretend that the | |
626 | * open actually succeeded. | |
627 | */ | |
628 | retval = -ENXIO; | |
629 | if (!scsi_device_online(sdev)) | |
630 | goto error_out; | |
631 | ||
632 | if (!sdkp->openers++ && sdev->removable) { | |
633 | if (scsi_block_when_processing_errors(sdev)) | |
634 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT); | |
635 | } | |
636 | ||
637 | return 0; | |
638 | ||
639 | error_out: | |
640 | scsi_disk_put(sdkp); | |
641 | return retval; | |
642 | } | |
643 | ||
644 | /** | |
645 | * sd_release - invoked when the (last) close(2) is called on this | |
646 | * scsi disk. | |
647 | * @inode: only i_rdev member may be used | |
648 | * @filp: only f_mode and f_flags may be used | |
649 | * | |
650 | * Returns 0. | |
651 | * | |
652 | * Note: may block (uninterruptible) if error recovery is underway | |
653 | * on this disk. | |
654 | **/ | |
655 | static int sd_release(struct inode *inode, struct file *filp) | |
656 | { | |
657 | struct gendisk *disk = inode->i_bdev->bd_disk; | |
658 | struct scsi_disk *sdkp = scsi_disk(disk); | |
659 | struct scsi_device *sdev = sdkp->device; | |
660 | ||
56937f7b | 661 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_release\n")); |
1da177e4 LT |
662 | |
663 | if (!--sdkp->openers && sdev->removable) { | |
664 | if (scsi_block_when_processing_errors(sdev)) | |
665 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW); | |
666 | } | |
667 | ||
668 | /* | |
669 | * XXX and what if there are packets in flight and this close() | |
670 | * XXX is followed by a "rmmod sd_mod"? | |
671 | */ | |
672 | scsi_disk_put(sdkp); | |
673 | return 0; | |
674 | } | |
675 | ||
a885c8c4 | 676 | static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
1da177e4 LT |
677 | { |
678 | struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk); | |
679 | struct scsi_device *sdp = sdkp->device; | |
680 | struct Scsi_Host *host = sdp->host; | |
681 | int diskinfo[4]; | |
682 | ||
683 | /* default to most commonly used values */ | |
684 | diskinfo[0] = 0x40; /* 1 << 6 */ | |
685 | diskinfo[1] = 0x20; /* 1 << 5 */ | |
686 | diskinfo[2] = sdkp->capacity >> 11; | |
687 | ||
688 | /* override with calculated, extended default, or driver values */ | |
689 | if (host->hostt->bios_param) | |
690 | host->hostt->bios_param(sdp, bdev, sdkp->capacity, diskinfo); | |
691 | else | |
692 | scsicam_bios_param(bdev, sdkp->capacity, diskinfo); | |
693 | ||
a885c8c4 CH |
694 | geo->heads = diskinfo[0]; |
695 | geo->sectors = diskinfo[1]; | |
696 | geo->cylinders = diskinfo[2]; | |
1da177e4 LT |
697 | return 0; |
698 | } | |
699 | ||
700 | /** | |
701 | * sd_ioctl - process an ioctl | |
702 | * @inode: only i_rdev/i_bdev members may be used | |
703 | * @filp: only f_mode and f_flags may be used | |
704 | * @cmd: ioctl command number | |
705 | * @arg: this is third argument given to ioctl(2) system call. | |
706 | * Often contains a pointer. | |
707 | * | |
708 | * Returns 0 if successful (some ioctls return postive numbers on | |
709 | * success as well). Returns a negated errno value in case of error. | |
710 | * | |
711 | * Note: most ioctls are forward onto the block subsystem or further | |
3a4fa0a2 | 712 | * down in the scsi subsystem. |
1da177e4 LT |
713 | **/ |
714 | static int sd_ioctl(struct inode * inode, struct file * filp, | |
715 | unsigned int cmd, unsigned long arg) | |
716 | { | |
717 | struct block_device *bdev = inode->i_bdev; | |
718 | struct gendisk *disk = bdev->bd_disk; | |
719 | struct scsi_device *sdp = scsi_disk(disk)->device; | |
720 | void __user *p = (void __user *)arg; | |
721 | int error; | |
722 | ||
723 | SCSI_LOG_IOCTL(1, printk("sd_ioctl: disk=%s, cmd=0x%x\n", | |
724 | disk->disk_name, cmd)); | |
725 | ||
726 | /* | |
727 | * If we are in the middle of error recovery, don't let anyone | |
728 | * else try and use this device. Also, if error recovery fails, it | |
729 | * may try and take the device offline, in which case all further | |
730 | * access to the device is prohibited. | |
731 | */ | |
732 | error = scsi_nonblockable_ioctl(sdp, cmd, p, filp); | |
733 | if (!scsi_block_when_processing_errors(sdp) || !error) | |
734 | return error; | |
735 | ||
1da177e4 LT |
736 | /* |
737 | * Send SCSI addressing ioctls directly to mid level, send other | |
738 | * ioctls to block level and then onto mid level if they can't be | |
739 | * resolved. | |
740 | */ | |
741 | switch (cmd) { | |
742 | case SCSI_IOCTL_GET_IDLUN: | |
743 | case SCSI_IOCTL_GET_BUS_NUMBER: | |
744 | return scsi_ioctl(sdp, cmd, p); | |
745 | default: | |
45e79a3a | 746 | error = scsi_cmd_ioctl(filp, disk->queue, disk, cmd, p); |
1da177e4 LT |
747 | if (error != -ENOTTY) |
748 | return error; | |
749 | } | |
750 | return scsi_ioctl(sdp, cmd, p); | |
751 | } | |
752 | ||
753 | static void set_media_not_present(struct scsi_disk *sdkp) | |
754 | { | |
755 | sdkp->media_present = 0; | |
756 | sdkp->capacity = 0; | |
757 | sdkp->device->changed = 1; | |
758 | } | |
759 | ||
760 | /** | |
761 | * sd_media_changed - check if our medium changed | |
762 | * @disk: kernel device descriptor | |
763 | * | |
764 | * Returns 0 if not applicable or no change; 1 if change | |
765 | * | |
766 | * Note: this function is invoked from the block subsystem. | |
767 | **/ | |
768 | static int sd_media_changed(struct gendisk *disk) | |
769 | { | |
770 | struct scsi_disk *sdkp = scsi_disk(disk); | |
771 | struct scsi_device *sdp = sdkp->device; | |
001aac25 | 772 | struct scsi_sense_hdr *sshdr = NULL; |
1da177e4 LT |
773 | int retval; |
774 | ||
fa0d34be | 775 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_media_changed\n")); |
1da177e4 LT |
776 | |
777 | if (!sdp->removable) | |
778 | return 0; | |
779 | ||
780 | /* | |
781 | * If the device is offline, don't send any commands - just pretend as | |
782 | * if the command failed. If the device ever comes back online, we | |
783 | * can deal with it then. It is only because of unrecoverable errors | |
784 | * that we would ever take a device offline in the first place. | |
785 | */ | |
285e9670 KS |
786 | if (!scsi_device_online(sdp)) { |
787 | set_media_not_present(sdkp); | |
788 | retval = 1; | |
789 | goto out; | |
790 | } | |
1da177e4 LT |
791 | |
792 | /* | |
793 | * Using TEST_UNIT_READY enables differentiation between drive with | |
794 | * no cartridge loaded - NOT READY, drive with changed cartridge - | |
795 | * UNIT ATTENTION, or with same cartridge - GOOD STATUS. | |
796 | * | |
797 | * Drives that auto spin down. eg iomega jaz 1G, will be started | |
798 | * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever | |
799 | * sd_revalidate() is called. | |
800 | */ | |
801 | retval = -ENODEV; | |
285e9670 | 802 | |
001aac25 JB |
803 | if (scsi_block_when_processing_errors(sdp)) { |
804 | sshdr = kzalloc(sizeof(*sshdr), GFP_KERNEL); | |
805 | retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, SD_MAX_RETRIES, | |
806 | sshdr); | |
807 | } | |
1da177e4 LT |
808 | |
809 | /* | |
810 | * Unable to test, unit probably not ready. This usually | |
811 | * means there is no disc in the drive. Mark as changed, | |
812 | * and we will figure it out later once the drive is | |
813 | * available again. | |
814 | */ | |
001aac25 JB |
815 | if (retval || (scsi_sense_valid(sshdr) && |
816 | /* 0x3a is medium not present */ | |
817 | sshdr->asc == 0x3a)) { | |
285e9670 KS |
818 | set_media_not_present(sdkp); |
819 | retval = 1; | |
820 | goto out; | |
821 | } | |
1da177e4 LT |
822 | |
823 | /* | |
824 | * For removable scsi disk we have to recognise the presence | |
825 | * of a disk in the drive. This is kept in the struct scsi_disk | |
826 | * struct and tested at open ! Daniel Roche (dan@lectra.fr) | |
827 | */ | |
828 | sdkp->media_present = 1; | |
829 | ||
830 | retval = sdp->changed; | |
831 | sdp->changed = 0; | |
285e9670 KS |
832 | out: |
833 | if (retval != sdkp->previous_state) | |
834 | sdev_evt_send_simple(sdp, SDEV_EVT_MEDIA_CHANGE, GFP_KERNEL); | |
835 | sdkp->previous_state = retval; | |
001aac25 | 836 | kfree(sshdr); |
1da177e4 | 837 | return retval; |
1da177e4 LT |
838 | } |
839 | ||
e73aec82 | 840 | static int sd_sync_cache(struct scsi_disk *sdkp) |
1da177e4 | 841 | { |
1da177e4 | 842 | int retries, res; |
e73aec82 | 843 | struct scsi_device *sdp = sdkp->device; |
ea73a9f2 | 844 | struct scsi_sense_hdr sshdr; |
1da177e4 LT |
845 | |
846 | if (!scsi_device_online(sdp)) | |
847 | return -ENODEV; | |
848 | ||
1da177e4 | 849 | |
1da177e4 LT |
850 | for (retries = 3; retries > 0; --retries) { |
851 | unsigned char cmd[10] = { 0 }; | |
852 | ||
853 | cmd[0] = SYNCHRONIZE_CACHE; | |
854 | /* | |
855 | * Leave the rest of the command zero to indicate | |
856 | * flush everything. | |
857 | */ | |
ea73a9f2 JB |
858 | res = scsi_execute_req(sdp, cmd, DMA_NONE, NULL, 0, &sshdr, |
859 | SD_TIMEOUT, SD_MAX_RETRIES); | |
860 | if (res == 0) | |
1da177e4 LT |
861 | break; |
862 | } | |
863 | ||
e73aec82 MP |
864 | if (res) { |
865 | sd_print_result(sdkp, res); | |
866 | if (driver_byte(res) & DRIVER_SENSE) | |
867 | sd_print_sense_hdr(sdkp, &sshdr); | |
1da177e4 LT |
868 | } |
869 | ||
3721050a TH |
870 | if (res) |
871 | return -EIO; | |
872 | return 0; | |
1da177e4 LT |
873 | } |
874 | ||
165125e1 | 875 | static void sd_prepare_flush(struct request_queue *q, struct request *rq) |
1da177e4 | 876 | { |
4aff5e23 | 877 | rq->cmd_type = REQ_TYPE_BLOCK_PC; |
c0ed79a3 JB |
878 | rq->timeout = SD_TIMEOUT; |
879 | rq->cmd[0] = SYNCHRONIZE_CACHE; | |
461d4e90 | 880 | rq->cmd_len = 10; |
1da177e4 LT |
881 | } |
882 | ||
883 | static void sd_rescan(struct device *dev) | |
884 | { | |
39b7f1e2 AS |
885 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
886 | ||
887 | if (sdkp) { | |
888 | sd_revalidate_disk(sdkp->disk); | |
889 | scsi_disk_put(sdkp); | |
890 | } | |
1da177e4 LT |
891 | } |
892 | ||
893 | ||
894 | #ifdef CONFIG_COMPAT | |
895 | /* | |
896 | * This gets directly called from VFS. When the ioctl | |
897 | * is not recognized we go back to the other translation paths. | |
898 | */ | |
899 | static long sd_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
900 | { | |
7ac6207b | 901 | struct block_device *bdev = file->f_path.dentry->d_inode->i_bdev; |
1da177e4 LT |
902 | struct gendisk *disk = bdev->bd_disk; |
903 | struct scsi_device *sdev = scsi_disk(disk)->device; | |
904 | ||
905 | /* | |
906 | * If we are in the middle of error recovery, don't let anyone | |
907 | * else try and use this device. Also, if error recovery fails, it | |
908 | * may try and take the device offline, in which case all further | |
909 | * access to the device is prohibited. | |
910 | */ | |
911 | if (!scsi_block_when_processing_errors(sdev)) | |
912 | return -ENODEV; | |
913 | ||
914 | if (sdev->host->hostt->compat_ioctl) { | |
915 | int ret; | |
916 | ||
917 | ret = sdev->host->hostt->compat_ioctl(sdev, cmd, (void __user *)arg); | |
918 | ||
919 | return ret; | |
920 | } | |
921 | ||
922 | /* | |
923 | * Let the static ioctl translation table take care of it. | |
924 | */ | |
925 | return -ENOIOCTLCMD; | |
926 | } | |
927 | #endif | |
928 | ||
929 | static struct block_device_operations sd_fops = { | |
930 | .owner = THIS_MODULE, | |
931 | .open = sd_open, | |
932 | .release = sd_release, | |
933 | .ioctl = sd_ioctl, | |
a885c8c4 | 934 | .getgeo = sd_getgeo, |
1da177e4 LT |
935 | #ifdef CONFIG_COMPAT |
936 | .compat_ioctl = sd_compat_ioctl, | |
937 | #endif | |
938 | .media_changed = sd_media_changed, | |
939 | .revalidate_disk = sd_revalidate_disk, | |
940 | }; | |
941 | ||
942 | /** | |
7b3d9545 | 943 | * sd_done - bottom half handler: called when the lower level |
1da177e4 LT |
944 | * driver has completed (successfully or otherwise) a scsi command. |
945 | * @SCpnt: mid-level's per command structure. | |
946 | * | |
947 | * Note: potentially run from within an ISR. Must not block. | |
948 | **/ | |
7b3d9545 | 949 | static int sd_done(struct scsi_cmnd *SCpnt) |
1da177e4 LT |
950 | { |
951 | int result = SCpnt->result; | |
30b0c37b | 952 | unsigned int xfer_size = scsi_bufflen(SCpnt); |
03aba2f7 LT |
953 | unsigned int good_bytes = result ? 0 : xfer_size; |
954 | u64 start_lba = SCpnt->request->sector; | |
366c246d | 955 | u64 end_lba = SCpnt->request->sector + (xfer_size / 512); |
03aba2f7 | 956 | u64 bad_lba; |
1da177e4 LT |
957 | struct scsi_sense_hdr sshdr; |
958 | int sense_valid = 0; | |
959 | int sense_deferred = 0; | |
960 | int info_valid; | |
961 | ||
962 | if (result) { | |
963 | sense_valid = scsi_command_normalize_sense(SCpnt, &sshdr); | |
964 | if (sense_valid) | |
965 | sense_deferred = scsi_sense_is_deferred(&sshdr); | |
966 | } | |
1da177e4 | 967 | #ifdef CONFIG_SCSI_LOGGING |
fa0d34be | 968 | SCSI_LOG_HLCOMPLETE(1, scsi_print_result(SCpnt)); |
1da177e4 | 969 | if (sense_valid) { |
fa0d34be | 970 | SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO, SCpnt, |
7b3d9545 | 971 | "sd_done: sb[respc,sk,asc," |
fa0d34be MP |
972 | "ascq]=%x,%x,%x,%x\n", |
973 | sshdr.response_code, | |
974 | sshdr.sense_key, sshdr.asc, | |
975 | sshdr.ascq)); | |
1da177e4 LT |
976 | } |
977 | #endif | |
03aba2f7 LT |
978 | if (driver_byte(result) != DRIVER_SENSE && |
979 | (!sense_valid || sense_deferred)) | |
980 | goto out; | |
981 | ||
982 | switch (sshdr.sense_key) { | |
983 | case HARDWARE_ERROR: | |
984 | case MEDIUM_ERROR: | |
985 | if (!blk_fs_request(SCpnt->request)) | |
986 | goto out; | |
987 | info_valid = scsi_get_sense_info_fld(SCpnt->sense_buffer, | |
988 | SCSI_SENSE_BUFFERSIZE, | |
989 | &bad_lba); | |
990 | if (!info_valid) | |
991 | goto out; | |
992 | if (xfer_size <= SCpnt->device->sector_size) | |
993 | goto out; | |
366c246d JB |
994 | if (SCpnt->device->sector_size < 512) { |
995 | /* only legitimate sector_size here is 256 */ | |
03aba2f7 | 996 | start_lba <<= 1; |
366c246d JB |
997 | end_lba <<= 1; |
998 | } else { | |
999 | /* be careful ... don't want any overflows */ | |
1000 | u64 factor = SCpnt->device->sector_size / 512; | |
1001 | do_div(start_lba, factor); | |
1002 | do_div(end_lba, factor); | |
1da177e4 | 1003 | } |
366c246d JB |
1004 | |
1005 | if (bad_lba < start_lba || bad_lba >= end_lba) | |
1006 | /* the bad lba was reported incorrectly, we have | |
1007 | * no idea where the error is | |
1008 | */ | |
1009 | goto out; | |
1010 | ||
03aba2f7 LT |
1011 | /* This computation should always be done in terms of |
1012 | * the resolution of the device's medium. | |
1013 | */ | |
1014 | good_bytes = (bad_lba - start_lba)*SCpnt->device->sector_size; | |
1015 | break; | |
1016 | case RECOVERED_ERROR: | |
1017 | case NO_SENSE: | |
1018 | /* Inform the user, but make sure that it's not treated | |
1019 | * as a hard error. | |
1020 | */ | |
1021 | scsi_print_sense("sd", SCpnt); | |
1022 | SCpnt->result = 0; | |
1023 | memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); | |
1024 | good_bytes = xfer_size; | |
1025 | break; | |
1026 | case ILLEGAL_REQUEST: | |
1027 | if (SCpnt->device->use_10_for_rw && | |
1028 | (SCpnt->cmnd[0] == READ_10 || | |
1029 | SCpnt->cmnd[0] == WRITE_10)) | |
1030 | SCpnt->device->use_10_for_rw = 0; | |
1031 | if (SCpnt->device->use_10_for_ms && | |
1032 | (SCpnt->cmnd[0] == MODE_SENSE_10 || | |
1033 | SCpnt->cmnd[0] == MODE_SELECT_10)) | |
1034 | SCpnt->device->use_10_for_ms = 0; | |
1035 | break; | |
1036 | default: | |
1037 | break; | |
1da177e4 | 1038 | } |
03aba2f7 | 1039 | out: |
7b3d9545 | 1040 | return good_bytes; |
1da177e4 LT |
1041 | } |
1042 | ||
ea73a9f2 JB |
1043 | static int media_not_present(struct scsi_disk *sdkp, |
1044 | struct scsi_sense_hdr *sshdr) | |
1da177e4 | 1045 | { |
1da177e4 | 1046 | |
ea73a9f2 | 1047 | if (!scsi_sense_valid(sshdr)) |
1da177e4 LT |
1048 | return 0; |
1049 | /* not invoked for commands that could return deferred errors */ | |
ea73a9f2 JB |
1050 | if (sshdr->sense_key != NOT_READY && |
1051 | sshdr->sense_key != UNIT_ATTENTION) | |
1052 | return 0; | |
1053 | if (sshdr->asc != 0x3A) /* medium not present */ | |
1054 | return 0; | |
1055 | ||
1da177e4 LT |
1056 | set_media_not_present(sdkp); |
1057 | return 1; | |
1058 | } | |
1059 | ||
1060 | /* | |
1061 | * spinup disk - called only in sd_revalidate_disk() | |
1062 | */ | |
1063 | static void | |
e73aec82 | 1064 | sd_spinup_disk(struct scsi_disk *sdkp) |
ea73a9f2 | 1065 | { |
1da177e4 | 1066 | unsigned char cmd[10]; |
4451e472 | 1067 | unsigned long spintime_expire = 0; |
1da177e4 LT |
1068 | int retries, spintime; |
1069 | unsigned int the_result; | |
1070 | struct scsi_sense_hdr sshdr; | |
1071 | int sense_valid = 0; | |
1072 | ||
1073 | spintime = 0; | |
1074 | ||
1075 | /* Spin up drives, as required. Only do this at boot time */ | |
1076 | /* Spinup needs to be done for module loads too. */ | |
1077 | do { | |
1078 | retries = 0; | |
1079 | ||
1080 | do { | |
1081 | cmd[0] = TEST_UNIT_READY; | |
1082 | memset((void *) &cmd[1], 0, 9); | |
1083 | ||
ea73a9f2 JB |
1084 | the_result = scsi_execute_req(sdkp->device, cmd, |
1085 | DMA_NONE, NULL, 0, | |
1086 | &sshdr, SD_TIMEOUT, | |
1087 | SD_MAX_RETRIES); | |
1da177e4 | 1088 | |
b4d38e38 AS |
1089 | /* |
1090 | * If the drive has indicated to us that it | |
1091 | * doesn't have any media in it, don't bother | |
1092 | * with any more polling. | |
1093 | */ | |
1094 | if (media_not_present(sdkp, &sshdr)) | |
1095 | return; | |
1096 | ||
1da177e4 | 1097 | if (the_result) |
ea73a9f2 | 1098 | sense_valid = scsi_sense_valid(&sshdr); |
1da177e4 LT |
1099 | retries++; |
1100 | } while (retries < 3 && | |
1101 | (!scsi_status_is_good(the_result) || | |
1102 | ((driver_byte(the_result) & DRIVER_SENSE) && | |
1103 | sense_valid && sshdr.sense_key == UNIT_ATTENTION))); | |
1104 | ||
1da177e4 LT |
1105 | if ((driver_byte(the_result) & DRIVER_SENSE) == 0) { |
1106 | /* no sense, TUR either succeeded or failed | |
1107 | * with a status error */ | |
e73aec82 MP |
1108 | if(!spintime && !scsi_status_is_good(the_result)) { |
1109 | sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n"); | |
1110 | sd_print_result(sdkp, the_result); | |
1111 | } | |
1da177e4 LT |
1112 | break; |
1113 | } | |
1114 | ||
1115 | /* | |
1116 | * The device does not want the automatic start to be issued. | |
1117 | */ | |
1118 | if (sdkp->device->no_start_on_add) { | |
1119 | break; | |
1120 | } | |
1121 | ||
1122 | /* | |
1123 | * If manual intervention is required, or this is an | |
1124 | * absent USB storage device, a spinup is meaningless. | |
1125 | */ | |
1126 | if (sense_valid && | |
1127 | sshdr.sense_key == NOT_READY && | |
1128 | sshdr.asc == 4 && sshdr.ascq == 3) { | |
1129 | break; /* manual intervention required */ | |
1130 | ||
1131 | /* | |
1132 | * Issue command to spin up drive when not ready | |
1133 | */ | |
1134 | } else if (sense_valid && sshdr.sense_key == NOT_READY) { | |
1135 | if (!spintime) { | |
e73aec82 | 1136 | sd_printk(KERN_NOTICE, sdkp, "Spinning up disk..."); |
1da177e4 LT |
1137 | cmd[0] = START_STOP; |
1138 | cmd[1] = 1; /* Return immediately */ | |
1139 | memset((void *) &cmd[2], 0, 8); | |
1140 | cmd[4] = 1; /* Start spin cycle */ | |
d2886ea3 SR |
1141 | if (sdkp->device->start_stop_pwr_cond) |
1142 | cmd[4] |= 1 << 4; | |
ea73a9f2 JB |
1143 | scsi_execute_req(sdkp->device, cmd, DMA_NONE, |
1144 | NULL, 0, &sshdr, | |
1145 | SD_TIMEOUT, SD_MAX_RETRIES); | |
4451e472 AS |
1146 | spintime_expire = jiffies + 100 * HZ; |
1147 | spintime = 1; | |
1da177e4 | 1148 | } |
1da177e4 LT |
1149 | /* Wait 1 second for next try */ |
1150 | msleep(1000); | |
1151 | printk("."); | |
4451e472 AS |
1152 | |
1153 | /* | |
1154 | * Wait for USB flash devices with slow firmware. | |
1155 | * Yes, this sense key/ASC combination shouldn't | |
1156 | * occur here. It's characteristic of these devices. | |
1157 | */ | |
1158 | } else if (sense_valid && | |
1159 | sshdr.sense_key == UNIT_ATTENTION && | |
1160 | sshdr.asc == 0x28) { | |
1161 | if (!spintime) { | |
1162 | spintime_expire = jiffies + 5 * HZ; | |
1163 | spintime = 1; | |
1164 | } | |
1165 | /* Wait 1 second for next try */ | |
1166 | msleep(1000); | |
1da177e4 LT |
1167 | } else { |
1168 | /* we don't understand the sense code, so it's | |
1169 | * probably pointless to loop */ | |
1170 | if(!spintime) { | |
e73aec82 MP |
1171 | sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n"); |
1172 | sd_print_sense_hdr(sdkp, &sshdr); | |
1da177e4 LT |
1173 | } |
1174 | break; | |
1175 | } | |
1176 | ||
4451e472 | 1177 | } while (spintime && time_before_eq(jiffies, spintime_expire)); |
1da177e4 LT |
1178 | |
1179 | if (spintime) { | |
1180 | if (scsi_status_is_good(the_result)) | |
1181 | printk("ready\n"); | |
1182 | else | |
1183 | printk("not responding...\n"); | |
1184 | } | |
1185 | } | |
1186 | ||
e0597d70 MP |
1187 | |
1188 | /* | |
1189 | * Determine whether disk supports Data Integrity Field. | |
1190 | */ | |
1191 | void sd_read_protection_type(struct scsi_disk *sdkp, unsigned char *buffer) | |
1192 | { | |
1193 | struct scsi_device *sdp = sdkp->device; | |
1194 | u8 type; | |
1195 | ||
1196 | if (scsi_device_protection(sdp) == 0 || (buffer[12] & 1) == 0) | |
1197 | type = 0; | |
1198 | else | |
1199 | type = ((buffer[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */ | |
1200 | ||
1201 | switch (type) { | |
1202 | case SD_DIF_TYPE0_PROTECTION: | |
1203 | sdkp->protection_type = 0; | |
1204 | break; | |
1205 | ||
1206 | case SD_DIF_TYPE1_PROTECTION: | |
1207 | case SD_DIF_TYPE3_PROTECTION: | |
1208 | sdkp->protection_type = type; | |
1209 | break; | |
1210 | ||
1211 | case SD_DIF_TYPE2_PROTECTION: | |
1212 | sd_printk(KERN_ERR, sdkp, "formatted with DIF Type 2 " \ | |
1213 | "protection which is currently unsupported. " \ | |
1214 | "Disabling disk!\n"); | |
1215 | goto disable; | |
1216 | ||
1217 | default: | |
1218 | sd_printk(KERN_ERR, sdkp, "formatted with unknown " \ | |
1219 | "protection type %d. Disabling disk!\n", type); | |
1220 | goto disable; | |
1221 | } | |
1222 | ||
1223 | return; | |
1224 | ||
1225 | disable: | |
1226 | sdkp->protection_type = 0; | |
1227 | sdkp->capacity = 0; | |
1228 | } | |
1229 | ||
1da177e4 LT |
1230 | /* |
1231 | * read disk capacity | |
1232 | */ | |
1233 | static void | |
e73aec82 | 1234 | sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer) |
ea73a9f2 | 1235 | { |
1da177e4 | 1236 | unsigned char cmd[16]; |
1da177e4 LT |
1237 | int the_result, retries; |
1238 | int sector_size = 0; | |
e0597d70 MP |
1239 | /* Force READ CAPACITY(16) when PROTECT=1 */ |
1240 | int longrc = scsi_device_protection(sdkp->device) ? 1 : 0; | |
1da177e4 LT |
1241 | struct scsi_sense_hdr sshdr; |
1242 | int sense_valid = 0; | |
ea73a9f2 | 1243 | struct scsi_device *sdp = sdkp->device; |
1da177e4 LT |
1244 | |
1245 | repeat: | |
1246 | retries = 3; | |
1247 | do { | |
1248 | if (longrc) { | |
1249 | memset((void *) cmd, 0, 16); | |
1250 | cmd[0] = SERVICE_ACTION_IN; | |
1251 | cmd[1] = SAI_READ_CAPACITY_16; | |
e0597d70 MP |
1252 | cmd[13] = 13; |
1253 | memset((void *) buffer, 0, 13); | |
1da177e4 LT |
1254 | } else { |
1255 | cmd[0] = READ_CAPACITY; | |
1256 | memset((void *) &cmd[1], 0, 9); | |
1257 | memset((void *) buffer, 0, 8); | |
1258 | } | |
1259 | ||
ea73a9f2 | 1260 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, |
e0597d70 | 1261 | buffer, longrc ? 13 : 8, &sshdr, |
ea73a9f2 | 1262 | SD_TIMEOUT, SD_MAX_RETRIES); |
1da177e4 | 1263 | |
ea73a9f2 | 1264 | if (media_not_present(sdkp, &sshdr)) |
1da177e4 LT |
1265 | return; |
1266 | ||
1da177e4 | 1267 | if (the_result) |
ea73a9f2 | 1268 | sense_valid = scsi_sense_valid(&sshdr); |
1da177e4 LT |
1269 | retries--; |
1270 | ||
1271 | } while (the_result && retries); | |
1272 | ||
1273 | if (the_result && !longrc) { | |
e73aec82 MP |
1274 | sd_printk(KERN_NOTICE, sdkp, "READ CAPACITY failed\n"); |
1275 | sd_print_result(sdkp, the_result); | |
1da177e4 | 1276 | if (driver_byte(the_result) & DRIVER_SENSE) |
e73aec82 | 1277 | sd_print_sense_hdr(sdkp, &sshdr); |
1da177e4 | 1278 | else |
e73aec82 | 1279 | sd_printk(KERN_NOTICE, sdkp, "Sense not available.\n"); |
1da177e4 LT |
1280 | |
1281 | /* Set dirty bit for removable devices if not ready - | |
1282 | * sometimes drives will not report this properly. */ | |
1283 | if (sdp->removable && | |
1284 | sense_valid && sshdr.sense_key == NOT_READY) | |
1285 | sdp->changed = 1; | |
1286 | ||
1287 | /* Either no media are present but the drive didn't tell us, | |
1288 | or they are present but the read capacity command fails */ | |
1289 | /* sdkp->media_present = 0; -- not always correct */ | |
69bdd88c | 1290 | sdkp->capacity = 0; /* unknown mapped to zero - as usual */ |
1da177e4 LT |
1291 | |
1292 | return; | |
1293 | } else if (the_result && longrc) { | |
1294 | /* READ CAPACITY(16) has been failed */ | |
e73aec82 MP |
1295 | sd_printk(KERN_NOTICE, sdkp, "READ CAPACITY(16) failed\n"); |
1296 | sd_print_result(sdkp, the_result); | |
1297 | sd_printk(KERN_NOTICE, sdkp, "Use 0xffffffff as device size\n"); | |
1298 | ||
1da177e4 LT |
1299 | sdkp->capacity = 1 + (sector_t) 0xffffffff; |
1300 | goto got_data; | |
1301 | } | |
1302 | ||
1303 | if (!longrc) { | |
1304 | sector_size = (buffer[4] << 24) | | |
1305 | (buffer[5] << 16) | (buffer[6] << 8) | buffer[7]; | |
1306 | if (buffer[0] == 0xff && buffer[1] == 0xff && | |
1307 | buffer[2] == 0xff && buffer[3] == 0xff) { | |
1308 | if(sizeof(sdkp->capacity) > 4) { | |
e73aec82 MP |
1309 | sd_printk(KERN_NOTICE, sdkp, "Very big device. " |
1310 | "Trying to use READ CAPACITY(16).\n"); | |
1da177e4 LT |
1311 | longrc = 1; |
1312 | goto repeat; | |
1313 | } | |
e73aec82 MP |
1314 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use " |
1315 | "a kernel compiled with support for large " | |
1316 | "block devices.\n"); | |
1da177e4 LT |
1317 | sdkp->capacity = 0; |
1318 | goto got_data; | |
1319 | } | |
1320 | sdkp->capacity = 1 + (((sector_t)buffer[0] << 24) | | |
1321 | (buffer[1] << 16) | | |
1322 | (buffer[2] << 8) | | |
1323 | buffer[3]); | |
1324 | } else { | |
1325 | sdkp->capacity = 1 + (((u64)buffer[0] << 56) | | |
1326 | ((u64)buffer[1] << 48) | | |
1327 | ((u64)buffer[2] << 40) | | |
1328 | ((u64)buffer[3] << 32) | | |
1329 | ((sector_t)buffer[4] << 24) | | |
1330 | ((sector_t)buffer[5] << 16) | | |
1331 | ((sector_t)buffer[6] << 8) | | |
1332 | (sector_t)buffer[7]); | |
1333 | ||
1334 | sector_size = (buffer[8] << 24) | | |
1335 | (buffer[9] << 16) | (buffer[10] << 8) | buffer[11]; | |
e0597d70 MP |
1336 | |
1337 | sd_read_protection_type(sdkp, buffer); | |
1da177e4 LT |
1338 | } |
1339 | ||
1340 | /* Some devices return the total number of sectors, not the | |
1341 | * highest sector number. Make the necessary adjustment. */ | |
61bf54b7 | 1342 | if (sdp->fix_capacity) { |
1da177e4 LT |
1343 | --sdkp->capacity; |
1344 | ||
61bf54b7 ON |
1345 | /* Some devices have version which report the correct sizes |
1346 | * and others which do not. We guess size according to a heuristic | |
1347 | * and err on the side of lowering the capacity. */ | |
1348 | } else { | |
1349 | if (sdp->guess_capacity) | |
1350 | if (sdkp->capacity & 0x01) /* odd sizes are odd */ | |
1351 | --sdkp->capacity; | |
1352 | } | |
1353 | ||
1da177e4 LT |
1354 | got_data: |
1355 | if (sector_size == 0) { | |
1356 | sector_size = 512; | |
e73aec82 MP |
1357 | sd_printk(KERN_NOTICE, sdkp, "Sector size 0 reported, " |
1358 | "assuming 512.\n"); | |
1da177e4 LT |
1359 | } |
1360 | ||
1361 | if (sector_size != 512 && | |
1362 | sector_size != 1024 && | |
1363 | sector_size != 2048 && | |
1364 | sector_size != 4096 && | |
1365 | sector_size != 256) { | |
e73aec82 MP |
1366 | sd_printk(KERN_NOTICE, sdkp, "Unsupported sector size %d.\n", |
1367 | sector_size); | |
1da177e4 LT |
1368 | /* |
1369 | * The user might want to re-format the drive with | |
1370 | * a supported sectorsize. Once this happens, it | |
1371 | * would be relatively trivial to set the thing up. | |
1372 | * For this reason, we leave the thing in the table. | |
1373 | */ | |
1374 | sdkp->capacity = 0; | |
1375 | /* | |
1376 | * set a bogus sector size so the normal read/write | |
1377 | * logic in the block layer will eventually refuse any | |
1378 | * request on this device without tripping over power | |
1379 | * of two sector size assumptions | |
1380 | */ | |
1381 | sector_size = 512; | |
1382 | } | |
1383 | { | |
1384 | /* | |
1385 | * The msdos fs needs to know the hardware sector size | |
1386 | * So I have created this table. See ll_rw_blk.c | |
1387 | * Jacques Gelinas (Jacques@solucorp.qc.ca) | |
1388 | */ | |
1389 | int hard_sector = sector_size; | |
7a691bd3 | 1390 | sector_t sz = (sdkp->capacity/2) * (hard_sector/256); |
165125e1 | 1391 | struct request_queue *queue = sdp->request_queue; |
7a691bd3 | 1392 | sector_t mb = sz; |
1da177e4 LT |
1393 | |
1394 | blk_queue_hardsect_size(queue, hard_sector); | |
1395 | /* avoid 64-bit division on 32-bit platforms */ | |
7a691bd3 | 1396 | sector_div(sz, 625); |
1da177e4 LT |
1397 | mb -= sz - 974; |
1398 | sector_div(mb, 1950); | |
1399 | ||
e73aec82 MP |
1400 | sd_printk(KERN_NOTICE, sdkp, |
1401 | "%llu %d-byte hardware sectors (%llu MB)\n", | |
1402 | (unsigned long long)sdkp->capacity, | |
1403 | hard_sector, (unsigned long long)mb); | |
1da177e4 LT |
1404 | } |
1405 | ||
1406 | /* Rescale capacity to 512-byte units */ | |
1407 | if (sector_size == 4096) | |
1408 | sdkp->capacity <<= 3; | |
1409 | else if (sector_size == 2048) | |
1410 | sdkp->capacity <<= 2; | |
1411 | else if (sector_size == 1024) | |
1412 | sdkp->capacity <<= 1; | |
1413 | else if (sector_size == 256) | |
1414 | sdkp->capacity >>= 1; | |
1415 | ||
1416 | sdkp->device->sector_size = sector_size; | |
1417 | } | |
1418 | ||
1419 | /* called with buffer of length 512 */ | |
1420 | static inline int | |
ea73a9f2 JB |
1421 | sd_do_mode_sense(struct scsi_device *sdp, int dbd, int modepage, |
1422 | unsigned char *buffer, int len, struct scsi_mode_data *data, | |
1423 | struct scsi_sense_hdr *sshdr) | |
1da177e4 | 1424 | { |
ea73a9f2 | 1425 | return scsi_mode_sense(sdp, dbd, modepage, buffer, len, |
1cf72699 | 1426 | SD_TIMEOUT, SD_MAX_RETRIES, data, |
ea73a9f2 | 1427 | sshdr); |
1da177e4 LT |
1428 | } |
1429 | ||
1430 | /* | |
1431 | * read write protect setting, if possible - called only in sd_revalidate_disk() | |
48970800 | 1432 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
1433 | */ |
1434 | static void | |
e73aec82 | 1435 | sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer) |
ea73a9f2 | 1436 | { |
1da177e4 | 1437 | int res; |
ea73a9f2 | 1438 | struct scsi_device *sdp = sdkp->device; |
1da177e4 LT |
1439 | struct scsi_mode_data data; |
1440 | ||
1441 | set_disk_ro(sdkp->disk, 0); | |
ea73a9f2 | 1442 | if (sdp->skip_ms_page_3f) { |
e73aec82 | 1443 | sd_printk(KERN_NOTICE, sdkp, "Assuming Write Enabled\n"); |
1da177e4 LT |
1444 | return; |
1445 | } | |
1446 | ||
ea73a9f2 JB |
1447 | if (sdp->use_192_bytes_for_3f) { |
1448 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 192, &data, NULL); | |
1da177e4 LT |
1449 | } else { |
1450 | /* | |
1451 | * First attempt: ask for all pages (0x3F), but only 4 bytes. | |
1452 | * We have to start carefully: some devices hang if we ask | |
1453 | * for more than is available. | |
1454 | */ | |
ea73a9f2 | 1455 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 4, &data, NULL); |
1da177e4 LT |
1456 | |
1457 | /* | |
1458 | * Second attempt: ask for page 0 When only page 0 is | |
1459 | * implemented, a request for page 3F may return Sense Key | |
1460 | * 5: Illegal Request, Sense Code 24: Invalid field in | |
1461 | * CDB. | |
1462 | */ | |
1463 | if (!scsi_status_is_good(res)) | |
ea73a9f2 | 1464 | res = sd_do_mode_sense(sdp, 0, 0, buffer, 4, &data, NULL); |
1da177e4 LT |
1465 | |
1466 | /* | |
1467 | * Third attempt: ask 255 bytes, as we did earlier. | |
1468 | */ | |
1469 | if (!scsi_status_is_good(res)) | |
ea73a9f2 JB |
1470 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 255, |
1471 | &data, NULL); | |
1da177e4 LT |
1472 | } |
1473 | ||
1474 | if (!scsi_status_is_good(res)) { | |
e73aec82 MP |
1475 | sd_printk(KERN_WARNING, sdkp, |
1476 | "Test WP failed, assume Write Enabled\n"); | |
1da177e4 LT |
1477 | } else { |
1478 | sdkp->write_prot = ((data.device_specific & 0x80) != 0); | |
1479 | set_disk_ro(sdkp->disk, sdkp->write_prot); | |
e73aec82 MP |
1480 | sd_printk(KERN_NOTICE, sdkp, "Write Protect is %s\n", |
1481 | sdkp->write_prot ? "on" : "off"); | |
1482 | sd_printk(KERN_DEBUG, sdkp, | |
1483 | "Mode Sense: %02x %02x %02x %02x\n", | |
1484 | buffer[0], buffer[1], buffer[2], buffer[3]); | |
1da177e4 LT |
1485 | } |
1486 | } | |
1487 | ||
1488 | /* | |
1489 | * sd_read_cache_type - called only from sd_revalidate_disk() | |
48970800 | 1490 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
1491 | */ |
1492 | static void | |
e73aec82 | 1493 | sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer) |
631e8a13 | 1494 | { |
1da177e4 | 1495 | int len = 0, res; |
ea73a9f2 | 1496 | struct scsi_device *sdp = sdkp->device; |
1da177e4 | 1497 | |
631e8a13 AV |
1498 | int dbd; |
1499 | int modepage; | |
1da177e4 LT |
1500 | struct scsi_mode_data data; |
1501 | struct scsi_sense_hdr sshdr; | |
1502 | ||
ea73a9f2 | 1503 | if (sdp->skip_ms_page_8) |
1da177e4 LT |
1504 | goto defaults; |
1505 | ||
ea73a9f2 | 1506 | if (sdp->type == TYPE_RBC) { |
631e8a13 AV |
1507 | modepage = 6; |
1508 | dbd = 8; | |
1509 | } else { | |
1510 | modepage = 8; | |
1511 | dbd = 0; | |
1512 | } | |
1513 | ||
1da177e4 | 1514 | /* cautiously ask */ |
ea73a9f2 | 1515 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, 4, &data, &sshdr); |
1da177e4 LT |
1516 | |
1517 | if (!scsi_status_is_good(res)) | |
1518 | goto bad_sense; | |
1519 | ||
6d73c851 AV |
1520 | if (!data.header_length) { |
1521 | modepage = 6; | |
e73aec82 | 1522 | sd_printk(KERN_ERR, sdkp, "Missing header in MODE_SENSE response\n"); |
6d73c851 AV |
1523 | } |
1524 | ||
1da177e4 LT |
1525 | /* that went OK, now ask for the proper length */ |
1526 | len = data.length; | |
1527 | ||
1528 | /* | |
1529 | * We're only interested in the first three bytes, actually. | |
1530 | * But the data cache page is defined for the first 20. | |
1531 | */ | |
1532 | if (len < 3) | |
1533 | goto bad_sense; | |
1534 | if (len > 20) | |
1535 | len = 20; | |
1536 | ||
1537 | /* Take headers and block descriptors into account */ | |
1538 | len += data.header_length + data.block_descriptor_length; | |
48970800 AV |
1539 | if (len > SD_BUF_SIZE) |
1540 | goto bad_sense; | |
1da177e4 LT |
1541 | |
1542 | /* Get the data */ | |
ea73a9f2 | 1543 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, len, &data, &sshdr); |
1da177e4 LT |
1544 | |
1545 | if (scsi_status_is_good(res)) { | |
631e8a13 | 1546 | int offset = data.header_length + data.block_descriptor_length; |
1da177e4 | 1547 | |
48970800 | 1548 | if (offset >= SD_BUF_SIZE - 2) { |
e73aec82 | 1549 | sd_printk(KERN_ERR, sdkp, "Malformed MODE SENSE response\n"); |
48970800 AV |
1550 | goto defaults; |
1551 | } | |
1552 | ||
631e8a13 | 1553 | if ((buffer[offset] & 0x3f) != modepage) { |
e73aec82 | 1554 | sd_printk(KERN_ERR, sdkp, "Got wrong page\n"); |
631e8a13 AV |
1555 | goto defaults; |
1556 | } | |
1557 | ||
1558 | if (modepage == 8) { | |
1559 | sdkp->WCE = ((buffer[offset + 2] & 0x04) != 0); | |
1560 | sdkp->RCD = ((buffer[offset + 2] & 0x01) != 0); | |
1561 | } else { | |
1562 | sdkp->WCE = ((buffer[offset + 2] & 0x01) == 0); | |
1563 | sdkp->RCD = 0; | |
1564 | } | |
1da177e4 | 1565 | |
007365ad TH |
1566 | sdkp->DPOFUA = (data.device_specific & 0x10) != 0; |
1567 | if (sdkp->DPOFUA && !sdkp->device->use_10_for_rw) { | |
e73aec82 MP |
1568 | sd_printk(KERN_NOTICE, sdkp, |
1569 | "Uses READ/WRITE(6), disabling FUA\n"); | |
007365ad TH |
1570 | sdkp->DPOFUA = 0; |
1571 | } | |
1572 | ||
e73aec82 MP |
1573 | sd_printk(KERN_NOTICE, sdkp, |
1574 | "Write cache: %s, read cache: %s, %s\n", | |
fd44bab5 LT |
1575 | sdkp->WCE ? "enabled" : "disabled", |
1576 | sdkp->RCD ? "disabled" : "enabled", | |
1577 | sdkp->DPOFUA ? "supports DPO and FUA" | |
1578 | : "doesn't support DPO or FUA"); | |
1da177e4 LT |
1579 | |
1580 | return; | |
1581 | } | |
1582 | ||
1583 | bad_sense: | |
ea73a9f2 | 1584 | if (scsi_sense_valid(&sshdr) && |
1da177e4 LT |
1585 | sshdr.sense_key == ILLEGAL_REQUEST && |
1586 | sshdr.asc == 0x24 && sshdr.ascq == 0x0) | |
e73aec82 MP |
1587 | /* Invalid field in CDB */ |
1588 | sd_printk(KERN_NOTICE, sdkp, "Cache data unavailable\n"); | |
1da177e4 | 1589 | else |
e73aec82 | 1590 | sd_printk(KERN_ERR, sdkp, "Asking for cache data failed\n"); |
1da177e4 LT |
1591 | |
1592 | defaults: | |
e73aec82 | 1593 | sd_printk(KERN_ERR, sdkp, "Assuming drive cache: write through\n"); |
1da177e4 LT |
1594 | sdkp->WCE = 0; |
1595 | sdkp->RCD = 0; | |
48970800 | 1596 | sdkp->DPOFUA = 0; |
1da177e4 LT |
1597 | } |
1598 | ||
e0597d70 MP |
1599 | /* |
1600 | * The ATO bit indicates whether the DIF application tag is available | |
1601 | * for use by the operating system. | |
1602 | */ | |
1603 | void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer) | |
1604 | { | |
1605 | int res, offset; | |
1606 | struct scsi_device *sdp = sdkp->device; | |
1607 | struct scsi_mode_data data; | |
1608 | struct scsi_sense_hdr sshdr; | |
1609 | ||
1610 | if (sdp->type != TYPE_DISK) | |
1611 | return; | |
1612 | ||
1613 | if (sdkp->protection_type == 0) | |
1614 | return; | |
1615 | ||
1616 | res = scsi_mode_sense(sdp, 1, 0x0a, buffer, 36, SD_TIMEOUT, | |
1617 | SD_MAX_RETRIES, &data, &sshdr); | |
1618 | ||
1619 | if (!scsi_status_is_good(res) || !data.header_length || | |
1620 | data.length < 6) { | |
1621 | sd_printk(KERN_WARNING, sdkp, | |
1622 | "getting Control mode page failed, assume no ATO\n"); | |
1623 | ||
1624 | if (scsi_sense_valid(&sshdr)) | |
1625 | sd_print_sense_hdr(sdkp, &sshdr); | |
1626 | ||
1627 | return; | |
1628 | } | |
1629 | ||
1630 | offset = data.header_length + data.block_descriptor_length; | |
1631 | ||
1632 | if ((buffer[offset] & 0x3f) != 0x0a) { | |
1633 | sd_printk(KERN_ERR, sdkp, "ATO Got wrong page\n"); | |
1634 | return; | |
1635 | } | |
1636 | ||
1637 | if ((buffer[offset + 5] & 0x80) == 0) | |
1638 | return; | |
1639 | ||
1640 | sdkp->ATO = 1; | |
1641 | ||
1642 | return; | |
1643 | } | |
1644 | ||
1da177e4 LT |
1645 | /** |
1646 | * sd_revalidate_disk - called the first time a new disk is seen, | |
1647 | * performs disk spin up, read_capacity, etc. | |
1648 | * @disk: struct gendisk we care about | |
1649 | **/ | |
1650 | static int sd_revalidate_disk(struct gendisk *disk) | |
1651 | { | |
1652 | struct scsi_disk *sdkp = scsi_disk(disk); | |
1653 | struct scsi_device *sdp = sdkp->device; | |
1da177e4 | 1654 | unsigned char *buffer; |
461d4e90 | 1655 | unsigned ordered; |
1da177e4 | 1656 | |
fa0d34be MP |
1657 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, |
1658 | "sd_revalidate_disk\n")); | |
1da177e4 LT |
1659 | |
1660 | /* | |
1661 | * If the device is offline, don't try and read capacity or any | |
1662 | * of the other niceties. | |
1663 | */ | |
1664 | if (!scsi_device_online(sdp)) | |
1665 | goto out; | |
1666 | ||
a6123f14 | 1667 | buffer = kmalloc(SD_BUF_SIZE, GFP_KERNEL); |
1da177e4 | 1668 | if (!buffer) { |
e73aec82 MP |
1669 | sd_printk(KERN_WARNING, sdkp, "sd_revalidate_disk: Memory " |
1670 | "allocation failure.\n"); | |
ea73a9f2 | 1671 | goto out; |
1da177e4 LT |
1672 | } |
1673 | ||
1674 | /* defaults, until the device tells us otherwise */ | |
1675 | sdp->sector_size = 512; | |
1676 | sdkp->capacity = 0; | |
1677 | sdkp->media_present = 1; | |
1678 | sdkp->write_prot = 0; | |
1679 | sdkp->WCE = 0; | |
1680 | sdkp->RCD = 0; | |
e0597d70 | 1681 | sdkp->ATO = 0; |
1da177e4 | 1682 | |
e73aec82 | 1683 | sd_spinup_disk(sdkp); |
1da177e4 LT |
1684 | |
1685 | /* | |
1686 | * Without media there is no reason to ask; moreover, some devices | |
1687 | * react badly if we do. | |
1688 | */ | |
1689 | if (sdkp->media_present) { | |
e73aec82 MP |
1690 | sd_read_capacity(sdkp, buffer); |
1691 | sd_read_write_protect_flag(sdkp, buffer); | |
1692 | sd_read_cache_type(sdkp, buffer); | |
e0597d70 | 1693 | sd_read_app_tag_own(sdkp, buffer); |
1da177e4 | 1694 | } |
461d4e90 TH |
1695 | |
1696 | /* | |
1697 | * We now have all cache related info, determine how we deal | |
1698 | * with ordered requests. Note that as the current SCSI | |
1699 | * dispatch function can alter request order, we cannot use | |
1700 | * QUEUE_ORDERED_TAG_* even when ordered tag is supported. | |
1701 | */ | |
1702 | if (sdkp->WCE) | |
007365ad TH |
1703 | ordered = sdkp->DPOFUA |
1704 | ? QUEUE_ORDERED_DRAIN_FUA : QUEUE_ORDERED_DRAIN_FLUSH; | |
461d4e90 TH |
1705 | else |
1706 | ordered = QUEUE_ORDERED_DRAIN; | |
1707 | ||
1708 | blk_queue_ordered(sdkp->disk->queue, ordered, sd_prepare_flush); | |
1709 | ||
1da177e4 LT |
1710 | set_capacity(disk, sdkp->capacity); |
1711 | kfree(buffer); | |
1712 | ||
1da177e4 LT |
1713 | out: |
1714 | return 0; | |
1715 | } | |
1716 | ||
1717 | /** | |
1718 | * sd_probe - called during driver initialization and whenever a | |
1719 | * new scsi device is attached to the system. It is called once | |
1720 | * for each scsi device (not just disks) present. | |
1721 | * @dev: pointer to device object | |
1722 | * | |
1723 | * Returns 0 if successful (or not interested in this scsi device | |
1724 | * (e.g. scanner)); 1 when there is an error. | |
1725 | * | |
1726 | * Note: this function is invoked from the scsi mid-level. | |
1727 | * This function sets up the mapping between a given | |
1728 | * <host,channel,id,lun> (found in sdp) and new device name | |
1729 | * (e.g. /dev/sda). More precisely it is the block device major | |
1730 | * and minor number that is chosen here. | |
1731 | * | |
1732 | * Assume sd_attach is not re-entrant (for time being) | |
1733 | * Also think about sd_attach() and sd_remove() running coincidentally. | |
1734 | **/ | |
1735 | static int sd_probe(struct device *dev) | |
1736 | { | |
1737 | struct scsi_device *sdp = to_scsi_device(dev); | |
1738 | struct scsi_disk *sdkp; | |
1739 | struct gendisk *gd; | |
1740 | u32 index; | |
1741 | int error; | |
1742 | ||
1743 | error = -ENODEV; | |
631e8a13 | 1744 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_MOD && sdp->type != TYPE_RBC) |
1da177e4 LT |
1745 | goto out; |
1746 | ||
9ccfc756 JB |
1747 | SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO, sdp, |
1748 | "sd_attach\n")); | |
1da177e4 LT |
1749 | |
1750 | error = -ENOMEM; | |
24669f75 | 1751 | sdkp = kzalloc(sizeof(*sdkp), GFP_KERNEL); |
1da177e4 LT |
1752 | if (!sdkp) |
1753 | goto out; | |
1754 | ||
1da177e4 LT |
1755 | gd = alloc_disk(16); |
1756 | if (!gd) | |
1757 | goto out_free; | |
1758 | ||
f27bac27 TH |
1759 | do { |
1760 | if (!ida_pre_get(&sd_index_ida, GFP_KERNEL)) | |
1761 | goto out_put; | |
1da177e4 | 1762 | |
f27bac27 TH |
1763 | error = ida_get_new(&sd_index_ida, &index); |
1764 | } while (error == -EAGAIN); | |
1da177e4 | 1765 | |
1da177e4 LT |
1766 | if (error) |
1767 | goto out_put; | |
1768 | ||
f27bac27 TH |
1769 | error = -EBUSY; |
1770 | if (index >= SD_MAX_DISKS) | |
1771 | goto out_free_index; | |
1772 | ||
1da177e4 LT |
1773 | sdkp->device = sdp; |
1774 | sdkp->driver = &sd_template; | |
1775 | sdkp->disk = gd; | |
1776 | sdkp->index = index; | |
1777 | sdkp->openers = 0; | |
c02e6002 | 1778 | sdkp->previous_state = 1; |
1da177e4 LT |
1779 | |
1780 | if (!sdp->timeout) { | |
631e8a13 | 1781 | if (sdp->type != TYPE_MOD) |
1da177e4 LT |
1782 | sdp->timeout = SD_TIMEOUT; |
1783 | else | |
1784 | sdp->timeout = SD_MOD_TIMEOUT; | |
1785 | } | |
1786 | ||
ee959b00 TJ |
1787 | device_initialize(&sdkp->dev); |
1788 | sdkp->dev.parent = &sdp->sdev_gendev; | |
1789 | sdkp->dev.class = &sd_disk_class; | |
1790 | strncpy(sdkp->dev.bus_id, sdp->sdev_gendev.bus_id, BUS_ID_SIZE); | |
017f2e37 | 1791 | |
ee959b00 | 1792 | if (device_add(&sdkp->dev)) |
f27bac27 | 1793 | goto out_free_index; |
017f2e37 NST |
1794 | |
1795 | get_device(&sdp->sdev_gendev); | |
1796 | ||
1da177e4 LT |
1797 | gd->major = sd_major((index & 0xf0) >> 4); |
1798 | gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00); | |
1799 | gd->minors = 16; | |
1800 | gd->fops = &sd_fops; | |
1801 | ||
1802 | if (index < 26) { | |
1803 | sprintf(gd->disk_name, "sd%c", 'a' + index % 26); | |
1804 | } else if (index < (26 + 1) * 26) { | |
1805 | sprintf(gd->disk_name, "sd%c%c", | |
1806 | 'a' + index / 26 - 1,'a' + index % 26); | |
1807 | } else { | |
1808 | const unsigned int m1 = (index / 26 - 1) / 26 - 1; | |
1809 | const unsigned int m2 = (index / 26 - 1) % 26; | |
1810 | const unsigned int m3 = index % 26; | |
1811 | sprintf(gd->disk_name, "sd%c%c%c", | |
1812 | 'a' + m1, 'a' + m2, 'a' + m3); | |
1813 | } | |
1814 | ||
1da177e4 | 1815 | gd->private_data = &sdkp->driver; |
461d4e90 | 1816 | gd->queue = sdkp->device->request_queue; |
1da177e4 LT |
1817 | |
1818 | sd_revalidate_disk(gd); | |
1819 | ||
7f9a6bc4 | 1820 | blk_queue_prep_rq(sdp->request_queue, sd_prep_fn); |
03a5743a | 1821 | |
1da177e4 LT |
1822 | gd->driverfs_dev = &sdp->sdev_gendev; |
1823 | gd->flags = GENHD_FL_DRIVERFS; | |
1824 | if (sdp->removable) | |
1825 | gd->flags |= GENHD_FL_REMOVABLE; | |
1da177e4 LT |
1826 | |
1827 | dev_set_drvdata(dev, sdkp); | |
1828 | add_disk(gd); | |
1829 | ||
e73aec82 MP |
1830 | sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n", |
1831 | sdp->removable ? "removable " : ""); | |
1da177e4 LT |
1832 | |
1833 | return 0; | |
1834 | ||
f27bac27 TH |
1835 | out_free_index: |
1836 | ida_remove(&sd_index_ida, index); | |
6bdaa1f1 | 1837 | out_put: |
1da177e4 | 1838 | put_disk(gd); |
6bdaa1f1 | 1839 | out_free: |
1da177e4 | 1840 | kfree(sdkp); |
6bdaa1f1 | 1841 | out: |
1da177e4 LT |
1842 | return error; |
1843 | } | |
1844 | ||
1845 | /** | |
1846 | * sd_remove - called whenever a scsi disk (previously recognized by | |
1847 | * sd_probe) is detached from the system. It is called (potentially | |
1848 | * multiple times) during sd module unload. | |
1849 | * @sdp: pointer to mid level scsi device object | |
1850 | * | |
1851 | * Note: this function is invoked from the scsi mid-level. | |
1852 | * This function potentially frees up a device name (e.g. /dev/sdc) | |
1853 | * that could be re-used by a subsequent sd_probe(). | |
1854 | * This function is not called when the built-in sd driver is "exit-ed". | |
1855 | **/ | |
1856 | static int sd_remove(struct device *dev) | |
1857 | { | |
1858 | struct scsi_disk *sdkp = dev_get_drvdata(dev); | |
1859 | ||
ee959b00 | 1860 | device_del(&sdkp->dev); |
1da177e4 LT |
1861 | del_gendisk(sdkp->disk); |
1862 | sd_shutdown(dev); | |
39b7f1e2 | 1863 | |
0b950672 | 1864 | mutex_lock(&sd_ref_mutex); |
39b7f1e2 | 1865 | dev_set_drvdata(dev, NULL); |
ee959b00 | 1866 | put_device(&sdkp->dev); |
0b950672 | 1867 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
1868 | |
1869 | return 0; | |
1870 | } | |
1871 | ||
1872 | /** | |
1873 | * scsi_disk_release - Called to free the scsi_disk structure | |
ee959b00 | 1874 | * @dev: pointer to embedded class device |
1da177e4 | 1875 | * |
0b950672 | 1876 | * sd_ref_mutex must be held entering this routine. Because it is |
1da177e4 LT |
1877 | * called on last put, you should always use the scsi_disk_get() |
1878 | * scsi_disk_put() helpers which manipulate the semaphore directly | |
ee959b00 | 1879 | * and never do a direct put_device. |
1da177e4 | 1880 | **/ |
ee959b00 | 1881 | static void scsi_disk_release(struct device *dev) |
1da177e4 | 1882 | { |
ee959b00 | 1883 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
1da177e4 LT |
1884 | struct gendisk *disk = sdkp->disk; |
1885 | ||
f27bac27 | 1886 | ida_remove(&sd_index_ida, sdkp->index); |
1da177e4 LT |
1887 | |
1888 | disk->private_data = NULL; | |
1da177e4 | 1889 | put_disk(disk); |
39b7f1e2 | 1890 | put_device(&sdkp->device->sdev_gendev); |
1da177e4 LT |
1891 | |
1892 | kfree(sdkp); | |
1893 | } | |
1894 | ||
cc5d2c8c | 1895 | static int sd_start_stop_device(struct scsi_disk *sdkp, int start) |
c3c94c5a TH |
1896 | { |
1897 | unsigned char cmd[6] = { START_STOP }; /* START_VALID */ | |
1898 | struct scsi_sense_hdr sshdr; | |
cc5d2c8c | 1899 | struct scsi_device *sdp = sdkp->device; |
c3c94c5a TH |
1900 | int res; |
1901 | ||
1902 | if (start) | |
1903 | cmd[4] |= 1; /* START */ | |
1904 | ||
d2886ea3 SR |
1905 | if (sdp->start_stop_pwr_cond) |
1906 | cmd[4] |= start ? 1 << 4 : 3 << 4; /* Active or Standby */ | |
1907 | ||
c3c94c5a TH |
1908 | if (!scsi_device_online(sdp)) |
1909 | return -ENODEV; | |
1910 | ||
1911 | res = scsi_execute_req(sdp, cmd, DMA_NONE, NULL, 0, &sshdr, | |
1912 | SD_TIMEOUT, SD_MAX_RETRIES); | |
1913 | if (res) { | |
cc5d2c8c JB |
1914 | sd_printk(KERN_WARNING, sdkp, "START_STOP FAILED\n"); |
1915 | sd_print_result(sdkp, res); | |
c3c94c5a | 1916 | if (driver_byte(res) & DRIVER_SENSE) |
cc5d2c8c | 1917 | sd_print_sense_hdr(sdkp, &sshdr); |
c3c94c5a TH |
1918 | } |
1919 | ||
1920 | return res; | |
1921 | } | |
1922 | ||
1da177e4 LT |
1923 | /* |
1924 | * Send a SYNCHRONIZE CACHE instruction down to the device through | |
1925 | * the normal SCSI command structure. Wait for the command to | |
1926 | * complete. | |
1927 | */ | |
1928 | static void sd_shutdown(struct device *dev) | |
1929 | { | |
39b7f1e2 | 1930 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
1da177e4 LT |
1931 | |
1932 | if (!sdkp) | |
1933 | return; /* this can happen */ | |
1934 | ||
39b7f1e2 | 1935 | if (sdkp->WCE) { |
e73aec82 MP |
1936 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
1937 | sd_sync_cache(sdkp); | |
39b7f1e2 | 1938 | } |
c3c94c5a | 1939 | |
cc5d2c8c JB |
1940 | if (system_state != SYSTEM_RESTART && sdkp->device->manage_start_stop) { |
1941 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); | |
1942 | sd_start_stop_device(sdkp, 0); | |
c3c94c5a TH |
1943 | } |
1944 | ||
39b7f1e2 AS |
1945 | scsi_disk_put(sdkp); |
1946 | } | |
1da177e4 | 1947 | |
c3c94c5a TH |
1948 | static int sd_suspend(struct device *dev, pm_message_t mesg) |
1949 | { | |
c3c94c5a | 1950 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
09ff92fe | 1951 | int ret = 0; |
c3c94c5a TH |
1952 | |
1953 | if (!sdkp) | |
1954 | return 0; /* this can happen */ | |
1955 | ||
1956 | if (sdkp->WCE) { | |
cc5d2c8c | 1957 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
c3c94c5a TH |
1958 | ret = sd_sync_cache(sdkp); |
1959 | if (ret) | |
09ff92fe | 1960 | goto done; |
c3c94c5a TH |
1961 | } |
1962 | ||
3a2d5b70 | 1963 | if ((mesg.event & PM_EVENT_SLEEP) && sdkp->device->manage_start_stop) { |
cc5d2c8c JB |
1964 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); |
1965 | ret = sd_start_stop_device(sdkp, 0); | |
c3c94c5a TH |
1966 | } |
1967 | ||
09ff92fe AS |
1968 | done: |
1969 | scsi_disk_put(sdkp); | |
1970 | return ret; | |
c3c94c5a TH |
1971 | } |
1972 | ||
1973 | static int sd_resume(struct device *dev) | |
1974 | { | |
c3c94c5a | 1975 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
09ff92fe | 1976 | int ret = 0; |
c3c94c5a | 1977 | |
cc5d2c8c | 1978 | if (!sdkp->device->manage_start_stop) |
09ff92fe | 1979 | goto done; |
c3c94c5a | 1980 | |
cc5d2c8c | 1981 | sd_printk(KERN_NOTICE, sdkp, "Starting disk\n"); |
09ff92fe | 1982 | ret = sd_start_stop_device(sdkp, 1); |
c3c94c5a | 1983 | |
09ff92fe AS |
1984 | done: |
1985 | scsi_disk_put(sdkp); | |
1986 | return ret; | |
c3c94c5a TH |
1987 | } |
1988 | ||
1da177e4 LT |
1989 | /** |
1990 | * init_sd - entry point for this driver (both when built in or when | |
1991 | * a module). | |
1992 | * | |
1993 | * Note: this function registers this driver with the scsi mid-level. | |
1994 | **/ | |
1995 | static int __init init_sd(void) | |
1996 | { | |
5e4009ba | 1997 | int majors = 0, i, err; |
1da177e4 LT |
1998 | |
1999 | SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n")); | |
2000 | ||
2001 | for (i = 0; i < SD_MAJORS; i++) | |
2002 | if (register_blkdev(sd_major(i), "sd") == 0) | |
2003 | majors++; | |
2004 | ||
2005 | if (!majors) | |
2006 | return -ENODEV; | |
2007 | ||
5e4009ba JG |
2008 | err = class_register(&sd_disk_class); |
2009 | if (err) | |
2010 | goto err_out; | |
6bdaa1f1 | 2011 | |
5e4009ba JG |
2012 | err = scsi_register_driver(&sd_template.gendrv); |
2013 | if (err) | |
2014 | goto err_out_class; | |
2015 | ||
2016 | return 0; | |
2017 | ||
2018 | err_out_class: | |
2019 | class_unregister(&sd_disk_class); | |
2020 | err_out: | |
2021 | for (i = 0; i < SD_MAJORS; i++) | |
2022 | unregister_blkdev(sd_major(i), "sd"); | |
2023 | return err; | |
1da177e4 LT |
2024 | } |
2025 | ||
2026 | /** | |
2027 | * exit_sd - exit point for this driver (when it is a module). | |
2028 | * | |
2029 | * Note: this function unregisters this driver from the scsi mid-level. | |
2030 | **/ | |
2031 | static void __exit exit_sd(void) | |
2032 | { | |
2033 | int i; | |
2034 | ||
2035 | SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n")); | |
2036 | ||
2037 | scsi_unregister_driver(&sd_template.gendrv); | |
5e4009ba JG |
2038 | class_unregister(&sd_disk_class); |
2039 | ||
1da177e4 LT |
2040 | for (i = 0; i < SD_MAJORS; i++) |
2041 | unregister_blkdev(sd_major(i), "sd"); | |
2042 | } | |
2043 | ||
1da177e4 LT |
2044 | module_init(init_sd); |
2045 | module_exit(exit_sd); | |
e73aec82 MP |
2046 | |
2047 | static void sd_print_sense_hdr(struct scsi_disk *sdkp, | |
2048 | struct scsi_sense_hdr *sshdr) | |
2049 | { | |
2050 | sd_printk(KERN_INFO, sdkp, ""); | |
2051 | scsi_show_sense_hdr(sshdr); | |
2052 | sd_printk(KERN_INFO, sdkp, ""); | |
2053 | scsi_show_extd_sense(sshdr->asc, sshdr->ascq); | |
2054 | } | |
2055 | ||
2056 | static void sd_print_result(struct scsi_disk *sdkp, int result) | |
2057 | { | |
2058 | sd_printk(KERN_INFO, sdkp, ""); | |
2059 | scsi_show_result(result); | |
2060 | } | |
2061 |