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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 | 375 | struct gendisk *disk = rq->rq_disk; |
af55ff67 | 376 | struct scsi_disk *sdkp; |
776b23a0 | 377 | sector_t block = rq->sector; |
18351070 | 378 | sector_t threshold; |
7f9a6bc4 | 379 | unsigned int this_count = rq->nr_sectors; |
776b23a0 | 380 | unsigned int timeout = sdp->timeout; |
7f9a6bc4 JB |
381 | int ret; |
382 | ||
383 | if (rq->cmd_type == REQ_TYPE_BLOCK_PC) { | |
384 | ret = scsi_setup_blk_pc_cmnd(sdp, rq); | |
385 | goto out; | |
386 | } else if (rq->cmd_type != REQ_TYPE_FS) { | |
387 | ret = BLKPREP_KILL; | |
388 | goto out; | |
389 | } | |
390 | ret = scsi_setup_fs_cmnd(sdp, rq); | |
391 | if (ret != BLKPREP_OK) | |
392 | goto out; | |
393 | SCpnt = rq->special; | |
af55ff67 | 394 | sdkp = scsi_disk(disk); |
7f9a6bc4 JB |
395 | |
396 | /* from here on until we're complete, any goto out | |
397 | * is used for a killable error condition */ | |
398 | ret = BLKPREP_KILL; | |
1da177e4 | 399 | |
fa0d34be MP |
400 | SCSI_LOG_HLQUEUE(1, scmd_printk(KERN_INFO, SCpnt, |
401 | "sd_init_command: block=%llu, " | |
402 | "count=%d\n", | |
403 | (unsigned long long)block, | |
404 | this_count)); | |
1da177e4 LT |
405 | |
406 | if (!sdp || !scsi_device_online(sdp) || | |
407 | block + rq->nr_sectors > get_capacity(disk)) { | |
fa0d34be MP |
408 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
409 | "Finishing %ld sectors\n", | |
410 | rq->nr_sectors)); | |
411 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, | |
412 | "Retry with 0x%p\n", SCpnt)); | |
7f9a6bc4 | 413 | goto out; |
1da177e4 LT |
414 | } |
415 | ||
416 | if (sdp->changed) { | |
417 | /* | |
418 | * quietly refuse to do anything to a changed disc until | |
419 | * the changed bit has been reset | |
420 | */ | |
421 | /* printk("SCSI disk has been changed. Prohibiting further I/O.\n"); */ | |
7f9a6bc4 | 422 | goto out; |
1da177e4 | 423 | } |
7f9a6bc4 | 424 | |
a0899d4d | 425 | /* |
18351070 LT |
426 | * Some SD card readers can't handle multi-sector accesses which touch |
427 | * the last one or two hardware sectors. Split accesses as needed. | |
a0899d4d | 428 | */ |
18351070 LT |
429 | threshold = get_capacity(disk) - SD_LAST_BUGGY_SECTORS * |
430 | (sdp->sector_size / 512); | |
431 | ||
432 | if (unlikely(sdp->last_sector_bug && block + this_count > threshold)) { | |
433 | if (block < threshold) { | |
434 | /* Access up to the threshold but not beyond */ | |
435 | this_count = threshold - block; | |
436 | } else { | |
437 | /* Access only a single hardware sector */ | |
438 | this_count = sdp->sector_size / 512; | |
439 | } | |
440 | } | |
a0899d4d | 441 | |
fa0d34be MP |
442 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, "block=%llu\n", |
443 | (unsigned long long)block)); | |
1da177e4 LT |
444 | |
445 | /* | |
446 | * If we have a 1K hardware sectorsize, prevent access to single | |
447 | * 512 byte sectors. In theory we could handle this - in fact | |
448 | * the scsi cdrom driver must be able to handle this because | |
449 | * we typically use 1K blocksizes, and cdroms typically have | |
450 | * 2K hardware sectorsizes. Of course, things are simpler | |
451 | * with the cdrom, since it is read-only. For performance | |
452 | * reasons, the filesystems should be able to handle this | |
453 | * and not force the scsi disk driver to use bounce buffers | |
454 | * for this. | |
455 | */ | |
456 | if (sdp->sector_size == 1024) { | |
457 | if ((block & 1) || (rq->nr_sectors & 1)) { | |
e73aec82 MP |
458 | scmd_printk(KERN_ERR, SCpnt, |
459 | "Bad block number requested\n"); | |
7f9a6bc4 | 460 | goto out; |
1da177e4 LT |
461 | } else { |
462 | block = block >> 1; | |
463 | this_count = this_count >> 1; | |
464 | } | |
465 | } | |
466 | if (sdp->sector_size == 2048) { | |
467 | if ((block & 3) || (rq->nr_sectors & 3)) { | |
e73aec82 MP |
468 | scmd_printk(KERN_ERR, SCpnt, |
469 | "Bad block number requested\n"); | |
7f9a6bc4 | 470 | goto out; |
1da177e4 LT |
471 | } else { |
472 | block = block >> 2; | |
473 | this_count = this_count >> 2; | |
474 | } | |
475 | } | |
476 | if (sdp->sector_size == 4096) { | |
477 | if ((block & 7) || (rq->nr_sectors & 7)) { | |
e73aec82 MP |
478 | scmd_printk(KERN_ERR, SCpnt, |
479 | "Bad block number requested\n"); | |
7f9a6bc4 | 480 | goto out; |
1da177e4 LT |
481 | } else { |
482 | block = block >> 3; | |
483 | this_count = this_count >> 3; | |
484 | } | |
485 | } | |
486 | if (rq_data_dir(rq) == WRITE) { | |
487 | if (!sdp->writeable) { | |
7f9a6bc4 | 488 | goto out; |
1da177e4 LT |
489 | } |
490 | SCpnt->cmnd[0] = WRITE_6; | |
491 | SCpnt->sc_data_direction = DMA_TO_DEVICE; | |
af55ff67 MP |
492 | |
493 | if (blk_integrity_rq(rq) && | |
494 | sd_dif_prepare(rq, block, sdp->sector_size) == -EIO) | |
495 | goto out; | |
496 | ||
1da177e4 LT |
497 | } else if (rq_data_dir(rq) == READ) { |
498 | SCpnt->cmnd[0] = READ_6; | |
499 | SCpnt->sc_data_direction = DMA_FROM_DEVICE; | |
500 | } else { | |
e73aec82 | 501 | scmd_printk(KERN_ERR, SCpnt, "Unknown command %x\n", rq->cmd_flags); |
7f9a6bc4 | 502 | goto out; |
1da177e4 LT |
503 | } |
504 | ||
fa0d34be MP |
505 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
506 | "%s %d/%ld 512 byte blocks.\n", | |
507 | (rq_data_dir(rq) == WRITE) ? | |
508 | "writing" : "reading", this_count, | |
509 | rq->nr_sectors)); | |
1da177e4 | 510 | |
af55ff67 MP |
511 | /* Set RDPROTECT/WRPROTECT if disk is formatted with DIF */ |
512 | if (scsi_host_dif_capable(sdp->host, sdkp->protection_type)) | |
513 | SCpnt->cmnd[1] = 1 << 5; | |
514 | else | |
515 | SCpnt->cmnd[1] = 0; | |
516 | ||
1da177e4 LT |
517 | if (block > 0xffffffff) { |
518 | SCpnt->cmnd[0] += READ_16 - READ_6; | |
007365ad | 519 | SCpnt->cmnd[1] |= blk_fua_rq(rq) ? 0x8 : 0; |
1da177e4 LT |
520 | SCpnt->cmnd[2] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0; |
521 | SCpnt->cmnd[3] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0; | |
522 | SCpnt->cmnd[4] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0; | |
523 | SCpnt->cmnd[5] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0; | |
524 | SCpnt->cmnd[6] = (unsigned char) (block >> 24) & 0xff; | |
525 | SCpnt->cmnd[7] = (unsigned char) (block >> 16) & 0xff; | |
526 | SCpnt->cmnd[8] = (unsigned char) (block >> 8) & 0xff; | |
527 | SCpnt->cmnd[9] = (unsigned char) block & 0xff; | |
528 | SCpnt->cmnd[10] = (unsigned char) (this_count >> 24) & 0xff; | |
529 | SCpnt->cmnd[11] = (unsigned char) (this_count >> 16) & 0xff; | |
530 | SCpnt->cmnd[12] = (unsigned char) (this_count >> 8) & 0xff; | |
531 | SCpnt->cmnd[13] = (unsigned char) this_count & 0xff; | |
532 | SCpnt->cmnd[14] = SCpnt->cmnd[15] = 0; | |
533 | } else if ((this_count > 0xff) || (block > 0x1fffff) || | |
af55ff67 | 534 | scsi_device_protection(SCpnt->device) || |
1da177e4 LT |
535 | SCpnt->device->use_10_for_rw) { |
536 | if (this_count > 0xffff) | |
537 | this_count = 0xffff; | |
538 | ||
539 | SCpnt->cmnd[0] += READ_10 - READ_6; | |
007365ad | 540 | SCpnt->cmnd[1] |= blk_fua_rq(rq) ? 0x8 : 0; |
1da177e4 LT |
541 | SCpnt->cmnd[2] = (unsigned char) (block >> 24) & 0xff; |
542 | SCpnt->cmnd[3] = (unsigned char) (block >> 16) & 0xff; | |
543 | SCpnt->cmnd[4] = (unsigned char) (block >> 8) & 0xff; | |
544 | SCpnt->cmnd[5] = (unsigned char) block & 0xff; | |
545 | SCpnt->cmnd[6] = SCpnt->cmnd[9] = 0; | |
546 | SCpnt->cmnd[7] = (unsigned char) (this_count >> 8) & 0xff; | |
547 | SCpnt->cmnd[8] = (unsigned char) this_count & 0xff; | |
548 | } else { | |
007365ad TH |
549 | if (unlikely(blk_fua_rq(rq))) { |
550 | /* | |
551 | * This happens only if this drive failed | |
552 | * 10byte rw command with ILLEGAL_REQUEST | |
553 | * during operation and thus turned off | |
554 | * use_10_for_rw. | |
555 | */ | |
e73aec82 MP |
556 | scmd_printk(KERN_ERR, SCpnt, |
557 | "FUA write on READ/WRITE(6) drive\n"); | |
7f9a6bc4 | 558 | goto out; |
007365ad TH |
559 | } |
560 | ||
1da177e4 LT |
561 | SCpnt->cmnd[1] |= (unsigned char) ((block >> 16) & 0x1f); |
562 | SCpnt->cmnd[2] = (unsigned char) ((block >> 8) & 0xff); | |
563 | SCpnt->cmnd[3] = (unsigned char) block & 0xff; | |
564 | SCpnt->cmnd[4] = (unsigned char) this_count; | |
565 | SCpnt->cmnd[5] = 0; | |
566 | } | |
30b0c37b | 567 | SCpnt->sdb.length = this_count * sdp->sector_size; |
1da177e4 | 568 | |
af55ff67 MP |
569 | /* If DIF or DIX is enabled, tell HBA how to handle request */ |
570 | if (sdkp->protection_type || scsi_prot_sg_count(SCpnt)) | |
571 | sd_dif_op(SCpnt, sdkp->protection_type, scsi_prot_sg_count(SCpnt)); | |
572 | ||
1da177e4 LT |
573 | /* |
574 | * We shouldn't disconnect in the middle of a sector, so with a dumb | |
575 | * host adapter, it's safe to assume that we can at least transfer | |
576 | * this many bytes between each connect / disconnect. | |
577 | */ | |
578 | SCpnt->transfersize = sdp->sector_size; | |
579 | SCpnt->underflow = this_count << 9; | |
580 | SCpnt->allowed = SD_MAX_RETRIES; | |
1da177e4 LT |
581 | SCpnt->timeout_per_command = timeout; |
582 | ||
1da177e4 LT |
583 | /* |
584 | * This indicates that the command is ready from our end to be | |
585 | * queued. | |
586 | */ | |
7f9a6bc4 JB |
587 | ret = BLKPREP_OK; |
588 | out: | |
589 | return scsi_prep_return(q, rq, ret); | |
1da177e4 LT |
590 | } |
591 | ||
592 | /** | |
593 | * sd_open - open a scsi disk device | |
594 | * @inode: only i_rdev member may be used | |
595 | * @filp: only f_mode and f_flags may be used | |
596 | * | |
597 | * Returns 0 if successful. Returns a negated errno value in case | |
598 | * of error. | |
599 | * | |
600 | * Note: This can be called from a user context (e.g. fsck(1) ) | |
601 | * or from within the kernel (e.g. as a result of a mount(1) ). | |
602 | * In the latter case @inode and @filp carry an abridged amount | |
603 | * of information as noted above. | |
604 | **/ | |
605 | static int sd_open(struct inode *inode, struct file *filp) | |
606 | { | |
607 | struct gendisk *disk = inode->i_bdev->bd_disk; | |
608 | struct scsi_disk *sdkp; | |
609 | struct scsi_device *sdev; | |
610 | int retval; | |
611 | ||
612 | if (!(sdkp = scsi_disk_get(disk))) | |
613 | return -ENXIO; | |
614 | ||
615 | ||
fa0d34be | 616 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_open\n")); |
1da177e4 LT |
617 | |
618 | sdev = sdkp->device; | |
619 | ||
620 | /* | |
621 | * If the device is in error recovery, wait until it is done. | |
622 | * If the device is offline, then disallow any access to it. | |
623 | */ | |
624 | retval = -ENXIO; | |
625 | if (!scsi_block_when_processing_errors(sdev)) | |
626 | goto error_out; | |
627 | ||
628 | if (sdev->removable || sdkp->write_prot) | |
629 | check_disk_change(inode->i_bdev); | |
630 | ||
631 | /* | |
632 | * If the drive is empty, just let the open fail. | |
633 | */ | |
634 | retval = -ENOMEDIUM; | |
635 | if (sdev->removable && !sdkp->media_present && | |
636 | !(filp->f_flags & O_NDELAY)) | |
637 | goto error_out; | |
638 | ||
639 | /* | |
640 | * If the device has the write protect tab set, have the open fail | |
641 | * if the user expects to be able to write to the thing. | |
642 | */ | |
643 | retval = -EROFS; | |
644 | if (sdkp->write_prot && (filp->f_mode & FMODE_WRITE)) | |
645 | goto error_out; | |
646 | ||
647 | /* | |
648 | * It is possible that the disk changing stuff resulted in | |
649 | * the device being taken offline. If this is the case, | |
650 | * report this to the user, and don't pretend that the | |
651 | * open actually succeeded. | |
652 | */ | |
653 | retval = -ENXIO; | |
654 | if (!scsi_device_online(sdev)) | |
655 | goto error_out; | |
656 | ||
657 | if (!sdkp->openers++ && sdev->removable) { | |
658 | if (scsi_block_when_processing_errors(sdev)) | |
659 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT); | |
660 | } | |
661 | ||
662 | return 0; | |
663 | ||
664 | error_out: | |
665 | scsi_disk_put(sdkp); | |
666 | return retval; | |
667 | } | |
668 | ||
669 | /** | |
670 | * sd_release - invoked when the (last) close(2) is called on this | |
671 | * scsi disk. | |
672 | * @inode: only i_rdev member may be used | |
673 | * @filp: only f_mode and f_flags may be used | |
674 | * | |
675 | * Returns 0. | |
676 | * | |
677 | * Note: may block (uninterruptible) if error recovery is underway | |
678 | * on this disk. | |
679 | **/ | |
680 | static int sd_release(struct inode *inode, struct file *filp) | |
681 | { | |
682 | struct gendisk *disk = inode->i_bdev->bd_disk; | |
683 | struct scsi_disk *sdkp = scsi_disk(disk); | |
684 | struct scsi_device *sdev = sdkp->device; | |
685 | ||
56937f7b | 686 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_release\n")); |
1da177e4 LT |
687 | |
688 | if (!--sdkp->openers && sdev->removable) { | |
689 | if (scsi_block_when_processing_errors(sdev)) | |
690 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW); | |
691 | } | |
692 | ||
693 | /* | |
694 | * XXX and what if there are packets in flight and this close() | |
695 | * XXX is followed by a "rmmod sd_mod"? | |
696 | */ | |
697 | scsi_disk_put(sdkp); | |
698 | return 0; | |
699 | } | |
700 | ||
a885c8c4 | 701 | static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
1da177e4 LT |
702 | { |
703 | struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk); | |
704 | struct scsi_device *sdp = sdkp->device; | |
705 | struct Scsi_Host *host = sdp->host; | |
706 | int diskinfo[4]; | |
707 | ||
708 | /* default to most commonly used values */ | |
709 | diskinfo[0] = 0x40; /* 1 << 6 */ | |
710 | diskinfo[1] = 0x20; /* 1 << 5 */ | |
711 | diskinfo[2] = sdkp->capacity >> 11; | |
712 | ||
713 | /* override with calculated, extended default, or driver values */ | |
714 | if (host->hostt->bios_param) | |
715 | host->hostt->bios_param(sdp, bdev, sdkp->capacity, diskinfo); | |
716 | else | |
717 | scsicam_bios_param(bdev, sdkp->capacity, diskinfo); | |
718 | ||
a885c8c4 CH |
719 | geo->heads = diskinfo[0]; |
720 | geo->sectors = diskinfo[1]; | |
721 | geo->cylinders = diskinfo[2]; | |
1da177e4 LT |
722 | return 0; |
723 | } | |
724 | ||
725 | /** | |
726 | * sd_ioctl - process an ioctl | |
727 | * @inode: only i_rdev/i_bdev members may be used | |
728 | * @filp: only f_mode and f_flags may be used | |
729 | * @cmd: ioctl command number | |
730 | * @arg: this is third argument given to ioctl(2) system call. | |
731 | * Often contains a pointer. | |
732 | * | |
733 | * Returns 0 if successful (some ioctls return postive numbers on | |
734 | * success as well). Returns a negated errno value in case of error. | |
735 | * | |
736 | * Note: most ioctls are forward onto the block subsystem or further | |
3a4fa0a2 | 737 | * down in the scsi subsystem. |
1da177e4 LT |
738 | **/ |
739 | static int sd_ioctl(struct inode * inode, struct file * filp, | |
740 | unsigned int cmd, unsigned long arg) | |
741 | { | |
742 | struct block_device *bdev = inode->i_bdev; | |
743 | struct gendisk *disk = bdev->bd_disk; | |
744 | struct scsi_device *sdp = scsi_disk(disk)->device; | |
745 | void __user *p = (void __user *)arg; | |
746 | int error; | |
747 | ||
748 | SCSI_LOG_IOCTL(1, printk("sd_ioctl: disk=%s, cmd=0x%x\n", | |
749 | disk->disk_name, cmd)); | |
750 | ||
751 | /* | |
752 | * If we are in the middle of error recovery, don't let anyone | |
753 | * else try and use this device. Also, if error recovery fails, it | |
754 | * may try and take the device offline, in which case all further | |
755 | * access to the device is prohibited. | |
756 | */ | |
757 | error = scsi_nonblockable_ioctl(sdp, cmd, p, filp); | |
758 | if (!scsi_block_when_processing_errors(sdp) || !error) | |
759 | return error; | |
760 | ||
1da177e4 LT |
761 | /* |
762 | * Send SCSI addressing ioctls directly to mid level, send other | |
763 | * ioctls to block level and then onto mid level if they can't be | |
764 | * resolved. | |
765 | */ | |
766 | switch (cmd) { | |
767 | case SCSI_IOCTL_GET_IDLUN: | |
768 | case SCSI_IOCTL_GET_BUS_NUMBER: | |
769 | return scsi_ioctl(sdp, cmd, p); | |
770 | default: | |
45e79a3a | 771 | error = scsi_cmd_ioctl(filp, disk->queue, disk, cmd, p); |
1da177e4 LT |
772 | if (error != -ENOTTY) |
773 | return error; | |
774 | } | |
775 | return scsi_ioctl(sdp, cmd, p); | |
776 | } | |
777 | ||
778 | static void set_media_not_present(struct scsi_disk *sdkp) | |
779 | { | |
780 | sdkp->media_present = 0; | |
781 | sdkp->capacity = 0; | |
782 | sdkp->device->changed = 1; | |
783 | } | |
784 | ||
785 | /** | |
786 | * sd_media_changed - check if our medium changed | |
787 | * @disk: kernel device descriptor | |
788 | * | |
789 | * Returns 0 if not applicable or no change; 1 if change | |
790 | * | |
791 | * Note: this function is invoked from the block subsystem. | |
792 | **/ | |
793 | static int sd_media_changed(struct gendisk *disk) | |
794 | { | |
795 | struct scsi_disk *sdkp = scsi_disk(disk); | |
796 | struct scsi_device *sdp = sdkp->device; | |
001aac25 | 797 | struct scsi_sense_hdr *sshdr = NULL; |
1da177e4 LT |
798 | int retval; |
799 | ||
fa0d34be | 800 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_media_changed\n")); |
1da177e4 LT |
801 | |
802 | if (!sdp->removable) | |
803 | return 0; | |
804 | ||
805 | /* | |
806 | * If the device is offline, don't send any commands - just pretend as | |
807 | * if the command failed. If the device ever comes back online, we | |
808 | * can deal with it then. It is only because of unrecoverable errors | |
809 | * that we would ever take a device offline in the first place. | |
810 | */ | |
285e9670 KS |
811 | if (!scsi_device_online(sdp)) { |
812 | set_media_not_present(sdkp); | |
813 | retval = 1; | |
814 | goto out; | |
815 | } | |
1da177e4 LT |
816 | |
817 | /* | |
818 | * Using TEST_UNIT_READY enables differentiation between drive with | |
819 | * no cartridge loaded - NOT READY, drive with changed cartridge - | |
820 | * UNIT ATTENTION, or with same cartridge - GOOD STATUS. | |
821 | * | |
822 | * Drives that auto spin down. eg iomega jaz 1G, will be started | |
823 | * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever | |
824 | * sd_revalidate() is called. | |
825 | */ | |
826 | retval = -ENODEV; | |
285e9670 | 827 | |
001aac25 JB |
828 | if (scsi_block_when_processing_errors(sdp)) { |
829 | sshdr = kzalloc(sizeof(*sshdr), GFP_KERNEL); | |
830 | retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, SD_MAX_RETRIES, | |
831 | sshdr); | |
832 | } | |
1da177e4 LT |
833 | |
834 | /* | |
835 | * Unable to test, unit probably not ready. This usually | |
836 | * means there is no disc in the drive. Mark as changed, | |
837 | * and we will figure it out later once the drive is | |
838 | * available again. | |
839 | */ | |
001aac25 JB |
840 | if (retval || (scsi_sense_valid(sshdr) && |
841 | /* 0x3a is medium not present */ | |
842 | sshdr->asc == 0x3a)) { | |
285e9670 KS |
843 | set_media_not_present(sdkp); |
844 | retval = 1; | |
845 | goto out; | |
846 | } | |
1da177e4 LT |
847 | |
848 | /* | |
849 | * For removable scsi disk we have to recognise the presence | |
850 | * of a disk in the drive. This is kept in the struct scsi_disk | |
851 | * struct and tested at open ! Daniel Roche (dan@lectra.fr) | |
852 | */ | |
853 | sdkp->media_present = 1; | |
854 | ||
855 | retval = sdp->changed; | |
856 | sdp->changed = 0; | |
285e9670 KS |
857 | out: |
858 | if (retval != sdkp->previous_state) | |
859 | sdev_evt_send_simple(sdp, SDEV_EVT_MEDIA_CHANGE, GFP_KERNEL); | |
860 | sdkp->previous_state = retval; | |
001aac25 | 861 | kfree(sshdr); |
1da177e4 | 862 | return retval; |
1da177e4 LT |
863 | } |
864 | ||
e73aec82 | 865 | static int sd_sync_cache(struct scsi_disk *sdkp) |
1da177e4 | 866 | { |
1da177e4 | 867 | int retries, res; |
e73aec82 | 868 | struct scsi_device *sdp = sdkp->device; |
ea73a9f2 | 869 | struct scsi_sense_hdr sshdr; |
1da177e4 LT |
870 | |
871 | if (!scsi_device_online(sdp)) | |
872 | return -ENODEV; | |
873 | ||
1da177e4 | 874 | |
1da177e4 LT |
875 | for (retries = 3; retries > 0; --retries) { |
876 | unsigned char cmd[10] = { 0 }; | |
877 | ||
878 | cmd[0] = SYNCHRONIZE_CACHE; | |
879 | /* | |
880 | * Leave the rest of the command zero to indicate | |
881 | * flush everything. | |
882 | */ | |
ea73a9f2 JB |
883 | res = scsi_execute_req(sdp, cmd, DMA_NONE, NULL, 0, &sshdr, |
884 | SD_TIMEOUT, SD_MAX_RETRIES); | |
885 | if (res == 0) | |
1da177e4 LT |
886 | break; |
887 | } | |
888 | ||
e73aec82 MP |
889 | if (res) { |
890 | sd_print_result(sdkp, res); | |
891 | if (driver_byte(res) & DRIVER_SENSE) | |
892 | sd_print_sense_hdr(sdkp, &sshdr); | |
1da177e4 LT |
893 | } |
894 | ||
3721050a TH |
895 | if (res) |
896 | return -EIO; | |
897 | return 0; | |
1da177e4 LT |
898 | } |
899 | ||
165125e1 | 900 | static void sd_prepare_flush(struct request_queue *q, struct request *rq) |
1da177e4 | 901 | { |
4aff5e23 | 902 | rq->cmd_type = REQ_TYPE_BLOCK_PC; |
c0ed79a3 JB |
903 | rq->timeout = SD_TIMEOUT; |
904 | rq->cmd[0] = SYNCHRONIZE_CACHE; | |
461d4e90 | 905 | rq->cmd_len = 10; |
1da177e4 LT |
906 | } |
907 | ||
908 | static void sd_rescan(struct device *dev) | |
909 | { | |
39b7f1e2 AS |
910 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
911 | ||
912 | if (sdkp) { | |
913 | sd_revalidate_disk(sdkp->disk); | |
914 | scsi_disk_put(sdkp); | |
915 | } | |
1da177e4 LT |
916 | } |
917 | ||
918 | ||
919 | #ifdef CONFIG_COMPAT | |
920 | /* | |
921 | * This gets directly called from VFS. When the ioctl | |
922 | * is not recognized we go back to the other translation paths. | |
923 | */ | |
924 | static long sd_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
925 | { | |
7ac6207b | 926 | struct block_device *bdev = file->f_path.dentry->d_inode->i_bdev; |
1da177e4 LT |
927 | struct gendisk *disk = bdev->bd_disk; |
928 | struct scsi_device *sdev = scsi_disk(disk)->device; | |
929 | ||
930 | /* | |
931 | * If we are in the middle of error recovery, don't let anyone | |
932 | * else try and use this device. Also, if error recovery fails, it | |
933 | * may try and take the device offline, in which case all further | |
934 | * access to the device is prohibited. | |
935 | */ | |
936 | if (!scsi_block_when_processing_errors(sdev)) | |
937 | return -ENODEV; | |
938 | ||
939 | if (sdev->host->hostt->compat_ioctl) { | |
940 | int ret; | |
941 | ||
942 | ret = sdev->host->hostt->compat_ioctl(sdev, cmd, (void __user *)arg); | |
943 | ||
944 | return ret; | |
945 | } | |
946 | ||
947 | /* | |
948 | * Let the static ioctl translation table take care of it. | |
949 | */ | |
950 | return -ENOIOCTLCMD; | |
951 | } | |
952 | #endif | |
953 | ||
954 | static struct block_device_operations sd_fops = { | |
955 | .owner = THIS_MODULE, | |
956 | .open = sd_open, | |
957 | .release = sd_release, | |
958 | .ioctl = sd_ioctl, | |
a885c8c4 | 959 | .getgeo = sd_getgeo, |
1da177e4 LT |
960 | #ifdef CONFIG_COMPAT |
961 | .compat_ioctl = sd_compat_ioctl, | |
962 | #endif | |
963 | .media_changed = sd_media_changed, | |
964 | .revalidate_disk = sd_revalidate_disk, | |
965 | }; | |
966 | ||
af55ff67 MP |
967 | static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd) |
968 | { | |
969 | u64 start_lba = scmd->request->sector; | |
970 | u64 end_lba = scmd->request->sector + (scsi_bufflen(scmd) / 512); | |
971 | u64 bad_lba; | |
972 | int info_valid; | |
973 | ||
974 | if (!blk_fs_request(scmd->request)) | |
975 | return 0; | |
976 | ||
977 | info_valid = scsi_get_sense_info_fld(scmd->sense_buffer, | |
978 | SCSI_SENSE_BUFFERSIZE, | |
979 | &bad_lba); | |
980 | if (!info_valid) | |
981 | return 0; | |
982 | ||
983 | if (scsi_bufflen(scmd) <= scmd->device->sector_size) | |
984 | return 0; | |
985 | ||
986 | if (scmd->device->sector_size < 512) { | |
987 | /* only legitimate sector_size here is 256 */ | |
988 | start_lba <<= 1; | |
989 | end_lba <<= 1; | |
990 | } else { | |
991 | /* be careful ... don't want any overflows */ | |
992 | u64 factor = scmd->device->sector_size / 512; | |
993 | do_div(start_lba, factor); | |
994 | do_div(end_lba, factor); | |
995 | } | |
996 | ||
997 | /* The bad lba was reported incorrectly, we have no idea where | |
998 | * the error is. | |
999 | */ | |
1000 | if (bad_lba < start_lba || bad_lba >= end_lba) | |
1001 | return 0; | |
1002 | ||
1003 | /* This computation should always be done in terms of | |
1004 | * the resolution of the device's medium. | |
1005 | */ | |
1006 | return (bad_lba - start_lba) * scmd->device->sector_size; | |
1007 | } | |
1008 | ||
1da177e4 | 1009 | /** |
7b3d9545 | 1010 | * sd_done - bottom half handler: called when the lower level |
1da177e4 LT |
1011 | * driver has completed (successfully or otherwise) a scsi command. |
1012 | * @SCpnt: mid-level's per command structure. | |
1013 | * | |
1014 | * Note: potentially run from within an ISR. Must not block. | |
1015 | **/ | |
7b3d9545 | 1016 | static int sd_done(struct scsi_cmnd *SCpnt) |
1da177e4 LT |
1017 | { |
1018 | int result = SCpnt->result; | |
af55ff67 | 1019 | unsigned int good_bytes = result ? 0 : scsi_bufflen(SCpnt); |
1da177e4 LT |
1020 | struct scsi_sense_hdr sshdr; |
1021 | int sense_valid = 0; | |
1022 | int sense_deferred = 0; | |
1da177e4 LT |
1023 | |
1024 | if (result) { | |
1025 | sense_valid = scsi_command_normalize_sense(SCpnt, &sshdr); | |
1026 | if (sense_valid) | |
1027 | sense_deferred = scsi_sense_is_deferred(&sshdr); | |
1028 | } | |
1da177e4 | 1029 | #ifdef CONFIG_SCSI_LOGGING |
fa0d34be | 1030 | SCSI_LOG_HLCOMPLETE(1, scsi_print_result(SCpnt)); |
1da177e4 | 1031 | if (sense_valid) { |
fa0d34be | 1032 | SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO, SCpnt, |
7b3d9545 | 1033 | "sd_done: sb[respc,sk,asc," |
fa0d34be MP |
1034 | "ascq]=%x,%x,%x,%x\n", |
1035 | sshdr.response_code, | |
1036 | sshdr.sense_key, sshdr.asc, | |
1037 | sshdr.ascq)); | |
1da177e4 LT |
1038 | } |
1039 | #endif | |
03aba2f7 LT |
1040 | if (driver_byte(result) != DRIVER_SENSE && |
1041 | (!sense_valid || sense_deferred)) | |
1042 | goto out; | |
1043 | ||
1044 | switch (sshdr.sense_key) { | |
1045 | case HARDWARE_ERROR: | |
1046 | case MEDIUM_ERROR: | |
af55ff67 | 1047 | good_bytes = sd_completed_bytes(SCpnt); |
03aba2f7 LT |
1048 | break; |
1049 | case RECOVERED_ERROR: | |
1050 | case NO_SENSE: | |
1051 | /* Inform the user, but make sure that it's not treated | |
1052 | * as a hard error. | |
1053 | */ | |
1054 | scsi_print_sense("sd", SCpnt); | |
1055 | SCpnt->result = 0; | |
1056 | memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); | |
af55ff67 MP |
1057 | good_bytes = scsi_bufflen(SCpnt); |
1058 | break; | |
1059 | case ABORTED_COMMAND: | |
1060 | if (sshdr.asc == 0x10) { /* DIF: Disk detected corruption */ | |
1061 | scsi_print_result(SCpnt); | |
1062 | scsi_print_sense("sd", SCpnt); | |
1063 | good_bytes = sd_completed_bytes(SCpnt); | |
1064 | } | |
03aba2f7 LT |
1065 | break; |
1066 | case ILLEGAL_REQUEST: | |
af55ff67 MP |
1067 | if (sshdr.asc == 0x10) { /* DIX: HBA detected corruption */ |
1068 | scsi_print_result(SCpnt); | |
1069 | scsi_print_sense("sd", SCpnt); | |
1070 | good_bytes = sd_completed_bytes(SCpnt); | |
1071 | } | |
1072 | if (!scsi_device_protection(SCpnt->device) && | |
1073 | SCpnt->device->use_10_for_rw && | |
03aba2f7 LT |
1074 | (SCpnt->cmnd[0] == READ_10 || |
1075 | SCpnt->cmnd[0] == WRITE_10)) | |
1076 | SCpnt->device->use_10_for_rw = 0; | |
1077 | if (SCpnt->device->use_10_for_ms && | |
1078 | (SCpnt->cmnd[0] == MODE_SENSE_10 || | |
1079 | SCpnt->cmnd[0] == MODE_SELECT_10)) | |
1080 | SCpnt->device->use_10_for_ms = 0; | |
1081 | break; | |
1082 | default: | |
1083 | break; | |
1da177e4 | 1084 | } |
03aba2f7 | 1085 | out: |
af55ff67 MP |
1086 | if (rq_data_dir(SCpnt->request) == READ && scsi_prot_sg_count(SCpnt)) |
1087 | sd_dif_complete(SCpnt, good_bytes); | |
1088 | ||
7b3d9545 | 1089 | return good_bytes; |
1da177e4 LT |
1090 | } |
1091 | ||
ea73a9f2 JB |
1092 | static int media_not_present(struct scsi_disk *sdkp, |
1093 | struct scsi_sense_hdr *sshdr) | |
1da177e4 | 1094 | { |
1da177e4 | 1095 | |
ea73a9f2 | 1096 | if (!scsi_sense_valid(sshdr)) |
1da177e4 LT |
1097 | return 0; |
1098 | /* not invoked for commands that could return deferred errors */ | |
ea73a9f2 JB |
1099 | if (sshdr->sense_key != NOT_READY && |
1100 | sshdr->sense_key != UNIT_ATTENTION) | |
1101 | return 0; | |
1102 | if (sshdr->asc != 0x3A) /* medium not present */ | |
1103 | return 0; | |
1104 | ||
1da177e4 LT |
1105 | set_media_not_present(sdkp); |
1106 | return 1; | |
1107 | } | |
1108 | ||
1109 | /* | |
1110 | * spinup disk - called only in sd_revalidate_disk() | |
1111 | */ | |
1112 | static void | |
e73aec82 | 1113 | sd_spinup_disk(struct scsi_disk *sdkp) |
ea73a9f2 | 1114 | { |
1da177e4 | 1115 | unsigned char cmd[10]; |
4451e472 | 1116 | unsigned long spintime_expire = 0; |
1da177e4 LT |
1117 | int retries, spintime; |
1118 | unsigned int the_result; | |
1119 | struct scsi_sense_hdr sshdr; | |
1120 | int sense_valid = 0; | |
1121 | ||
1122 | spintime = 0; | |
1123 | ||
1124 | /* Spin up drives, as required. Only do this at boot time */ | |
1125 | /* Spinup needs to be done for module loads too. */ | |
1126 | do { | |
1127 | retries = 0; | |
1128 | ||
1129 | do { | |
1130 | cmd[0] = TEST_UNIT_READY; | |
1131 | memset((void *) &cmd[1], 0, 9); | |
1132 | ||
ea73a9f2 JB |
1133 | the_result = scsi_execute_req(sdkp->device, cmd, |
1134 | DMA_NONE, NULL, 0, | |
1135 | &sshdr, SD_TIMEOUT, | |
1136 | SD_MAX_RETRIES); | |
1da177e4 | 1137 | |
b4d38e38 AS |
1138 | /* |
1139 | * If the drive has indicated to us that it | |
1140 | * doesn't have any media in it, don't bother | |
1141 | * with any more polling. | |
1142 | */ | |
1143 | if (media_not_present(sdkp, &sshdr)) | |
1144 | return; | |
1145 | ||
1da177e4 | 1146 | if (the_result) |
ea73a9f2 | 1147 | sense_valid = scsi_sense_valid(&sshdr); |
1da177e4 LT |
1148 | retries++; |
1149 | } while (retries < 3 && | |
1150 | (!scsi_status_is_good(the_result) || | |
1151 | ((driver_byte(the_result) & DRIVER_SENSE) && | |
1152 | sense_valid && sshdr.sense_key == UNIT_ATTENTION))); | |
1153 | ||
1da177e4 LT |
1154 | if ((driver_byte(the_result) & DRIVER_SENSE) == 0) { |
1155 | /* no sense, TUR either succeeded or failed | |
1156 | * with a status error */ | |
e73aec82 MP |
1157 | if(!spintime && !scsi_status_is_good(the_result)) { |
1158 | sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n"); | |
1159 | sd_print_result(sdkp, the_result); | |
1160 | } | |
1da177e4 LT |
1161 | break; |
1162 | } | |
1163 | ||
1164 | /* | |
1165 | * The device does not want the automatic start to be issued. | |
1166 | */ | |
1167 | if (sdkp->device->no_start_on_add) { | |
1168 | break; | |
1169 | } | |
1170 | ||
1171 | /* | |
1172 | * If manual intervention is required, or this is an | |
1173 | * absent USB storage device, a spinup is meaningless. | |
1174 | */ | |
1175 | if (sense_valid && | |
1176 | sshdr.sense_key == NOT_READY && | |
1177 | sshdr.asc == 4 && sshdr.ascq == 3) { | |
1178 | break; /* manual intervention required */ | |
1179 | ||
1180 | /* | |
1181 | * Issue command to spin up drive when not ready | |
1182 | */ | |
1183 | } else if (sense_valid && sshdr.sense_key == NOT_READY) { | |
1184 | if (!spintime) { | |
e73aec82 | 1185 | sd_printk(KERN_NOTICE, sdkp, "Spinning up disk..."); |
1da177e4 LT |
1186 | cmd[0] = START_STOP; |
1187 | cmd[1] = 1; /* Return immediately */ | |
1188 | memset((void *) &cmd[2], 0, 8); | |
1189 | cmd[4] = 1; /* Start spin cycle */ | |
d2886ea3 SR |
1190 | if (sdkp->device->start_stop_pwr_cond) |
1191 | cmd[4] |= 1 << 4; | |
ea73a9f2 JB |
1192 | scsi_execute_req(sdkp->device, cmd, DMA_NONE, |
1193 | NULL, 0, &sshdr, | |
1194 | SD_TIMEOUT, SD_MAX_RETRIES); | |
4451e472 AS |
1195 | spintime_expire = jiffies + 100 * HZ; |
1196 | spintime = 1; | |
1da177e4 | 1197 | } |
1da177e4 LT |
1198 | /* Wait 1 second for next try */ |
1199 | msleep(1000); | |
1200 | printk("."); | |
4451e472 AS |
1201 | |
1202 | /* | |
1203 | * Wait for USB flash devices with slow firmware. | |
1204 | * Yes, this sense key/ASC combination shouldn't | |
1205 | * occur here. It's characteristic of these devices. | |
1206 | */ | |
1207 | } else if (sense_valid && | |
1208 | sshdr.sense_key == UNIT_ATTENTION && | |
1209 | sshdr.asc == 0x28) { | |
1210 | if (!spintime) { | |
1211 | spintime_expire = jiffies + 5 * HZ; | |
1212 | spintime = 1; | |
1213 | } | |
1214 | /* Wait 1 second for next try */ | |
1215 | msleep(1000); | |
1da177e4 LT |
1216 | } else { |
1217 | /* we don't understand the sense code, so it's | |
1218 | * probably pointless to loop */ | |
1219 | if(!spintime) { | |
e73aec82 MP |
1220 | sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n"); |
1221 | sd_print_sense_hdr(sdkp, &sshdr); | |
1da177e4 LT |
1222 | } |
1223 | break; | |
1224 | } | |
1225 | ||
4451e472 | 1226 | } while (spintime && time_before_eq(jiffies, spintime_expire)); |
1da177e4 LT |
1227 | |
1228 | if (spintime) { | |
1229 | if (scsi_status_is_good(the_result)) | |
1230 | printk("ready\n"); | |
1231 | else | |
1232 | printk("not responding...\n"); | |
1233 | } | |
1234 | } | |
1235 | ||
e0597d70 MP |
1236 | |
1237 | /* | |
1238 | * Determine whether disk supports Data Integrity Field. | |
1239 | */ | |
1240 | void sd_read_protection_type(struct scsi_disk *sdkp, unsigned char *buffer) | |
1241 | { | |
1242 | struct scsi_device *sdp = sdkp->device; | |
1243 | u8 type; | |
1244 | ||
1245 | if (scsi_device_protection(sdp) == 0 || (buffer[12] & 1) == 0) | |
1246 | type = 0; | |
1247 | else | |
1248 | type = ((buffer[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */ | |
1249 | ||
1250 | switch (type) { | |
1251 | case SD_DIF_TYPE0_PROTECTION: | |
1252 | sdkp->protection_type = 0; | |
1253 | break; | |
1254 | ||
1255 | case SD_DIF_TYPE1_PROTECTION: | |
1256 | case SD_DIF_TYPE3_PROTECTION: | |
1257 | sdkp->protection_type = type; | |
1258 | break; | |
1259 | ||
1260 | case SD_DIF_TYPE2_PROTECTION: | |
1261 | sd_printk(KERN_ERR, sdkp, "formatted with DIF Type 2 " \ | |
1262 | "protection which is currently unsupported. " \ | |
1263 | "Disabling disk!\n"); | |
1264 | goto disable; | |
1265 | ||
1266 | default: | |
1267 | sd_printk(KERN_ERR, sdkp, "formatted with unknown " \ | |
1268 | "protection type %d. Disabling disk!\n", type); | |
1269 | goto disable; | |
1270 | } | |
1271 | ||
1272 | return; | |
1273 | ||
1274 | disable: | |
1275 | sdkp->protection_type = 0; | |
1276 | sdkp->capacity = 0; | |
1277 | } | |
1278 | ||
1da177e4 LT |
1279 | /* |
1280 | * read disk capacity | |
1281 | */ | |
1282 | static void | |
e73aec82 | 1283 | sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer) |
ea73a9f2 | 1284 | { |
1da177e4 | 1285 | unsigned char cmd[16]; |
1da177e4 LT |
1286 | int the_result, retries; |
1287 | int sector_size = 0; | |
e0597d70 MP |
1288 | /* Force READ CAPACITY(16) when PROTECT=1 */ |
1289 | int longrc = scsi_device_protection(sdkp->device) ? 1 : 0; | |
1da177e4 LT |
1290 | struct scsi_sense_hdr sshdr; |
1291 | int sense_valid = 0; | |
ea73a9f2 | 1292 | struct scsi_device *sdp = sdkp->device; |
1da177e4 LT |
1293 | |
1294 | repeat: | |
1295 | retries = 3; | |
1296 | do { | |
1297 | if (longrc) { | |
1298 | memset((void *) cmd, 0, 16); | |
1299 | cmd[0] = SERVICE_ACTION_IN; | |
1300 | cmd[1] = SAI_READ_CAPACITY_16; | |
e0597d70 MP |
1301 | cmd[13] = 13; |
1302 | memset((void *) buffer, 0, 13); | |
1da177e4 LT |
1303 | } else { |
1304 | cmd[0] = READ_CAPACITY; | |
1305 | memset((void *) &cmd[1], 0, 9); | |
1306 | memset((void *) buffer, 0, 8); | |
1307 | } | |
1308 | ||
ea73a9f2 | 1309 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, |
e0597d70 | 1310 | buffer, longrc ? 13 : 8, &sshdr, |
ea73a9f2 | 1311 | SD_TIMEOUT, SD_MAX_RETRIES); |
1da177e4 | 1312 | |
ea73a9f2 | 1313 | if (media_not_present(sdkp, &sshdr)) |
1da177e4 LT |
1314 | return; |
1315 | ||
1da177e4 | 1316 | if (the_result) |
ea73a9f2 | 1317 | sense_valid = scsi_sense_valid(&sshdr); |
1da177e4 LT |
1318 | retries--; |
1319 | ||
1320 | } while (the_result && retries); | |
1321 | ||
1322 | if (the_result && !longrc) { | |
e73aec82 MP |
1323 | sd_printk(KERN_NOTICE, sdkp, "READ CAPACITY failed\n"); |
1324 | sd_print_result(sdkp, the_result); | |
1da177e4 | 1325 | if (driver_byte(the_result) & DRIVER_SENSE) |
e73aec82 | 1326 | sd_print_sense_hdr(sdkp, &sshdr); |
1da177e4 | 1327 | else |
e73aec82 | 1328 | sd_printk(KERN_NOTICE, sdkp, "Sense not available.\n"); |
1da177e4 LT |
1329 | |
1330 | /* Set dirty bit for removable devices if not ready - | |
1331 | * sometimes drives will not report this properly. */ | |
1332 | if (sdp->removable && | |
1333 | sense_valid && sshdr.sense_key == NOT_READY) | |
1334 | sdp->changed = 1; | |
1335 | ||
1336 | /* Either no media are present but the drive didn't tell us, | |
1337 | or they are present but the read capacity command fails */ | |
1338 | /* sdkp->media_present = 0; -- not always correct */ | |
69bdd88c | 1339 | sdkp->capacity = 0; /* unknown mapped to zero - as usual */ |
1da177e4 LT |
1340 | |
1341 | return; | |
1342 | } else if (the_result && longrc) { | |
1343 | /* READ CAPACITY(16) has been failed */ | |
e73aec82 MP |
1344 | sd_printk(KERN_NOTICE, sdkp, "READ CAPACITY(16) failed\n"); |
1345 | sd_print_result(sdkp, the_result); | |
1346 | sd_printk(KERN_NOTICE, sdkp, "Use 0xffffffff as device size\n"); | |
1347 | ||
1da177e4 LT |
1348 | sdkp->capacity = 1 + (sector_t) 0xffffffff; |
1349 | goto got_data; | |
1350 | } | |
1351 | ||
1352 | if (!longrc) { | |
1353 | sector_size = (buffer[4] << 24) | | |
1354 | (buffer[5] << 16) | (buffer[6] << 8) | buffer[7]; | |
1355 | if (buffer[0] == 0xff && buffer[1] == 0xff && | |
1356 | buffer[2] == 0xff && buffer[3] == 0xff) { | |
1357 | if(sizeof(sdkp->capacity) > 4) { | |
e73aec82 MP |
1358 | sd_printk(KERN_NOTICE, sdkp, "Very big device. " |
1359 | "Trying to use READ CAPACITY(16).\n"); | |
1da177e4 LT |
1360 | longrc = 1; |
1361 | goto repeat; | |
1362 | } | |
e73aec82 MP |
1363 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use " |
1364 | "a kernel compiled with support for large " | |
1365 | "block devices.\n"); | |
1da177e4 LT |
1366 | sdkp->capacity = 0; |
1367 | goto got_data; | |
1368 | } | |
1369 | sdkp->capacity = 1 + (((sector_t)buffer[0] << 24) | | |
1370 | (buffer[1] << 16) | | |
1371 | (buffer[2] << 8) | | |
1372 | buffer[3]); | |
1373 | } else { | |
1374 | sdkp->capacity = 1 + (((u64)buffer[0] << 56) | | |
1375 | ((u64)buffer[1] << 48) | | |
1376 | ((u64)buffer[2] << 40) | | |
1377 | ((u64)buffer[3] << 32) | | |
1378 | ((sector_t)buffer[4] << 24) | | |
1379 | ((sector_t)buffer[5] << 16) | | |
1380 | ((sector_t)buffer[6] << 8) | | |
1381 | (sector_t)buffer[7]); | |
1382 | ||
1383 | sector_size = (buffer[8] << 24) | | |
1384 | (buffer[9] << 16) | (buffer[10] << 8) | buffer[11]; | |
e0597d70 MP |
1385 | |
1386 | sd_read_protection_type(sdkp, buffer); | |
1da177e4 LT |
1387 | } |
1388 | ||
1389 | /* Some devices return the total number of sectors, not the | |
1390 | * highest sector number. Make the necessary adjustment. */ | |
61bf54b7 | 1391 | if (sdp->fix_capacity) { |
1da177e4 LT |
1392 | --sdkp->capacity; |
1393 | ||
61bf54b7 ON |
1394 | /* Some devices have version which report the correct sizes |
1395 | * and others which do not. We guess size according to a heuristic | |
1396 | * and err on the side of lowering the capacity. */ | |
1397 | } else { | |
1398 | if (sdp->guess_capacity) | |
1399 | if (sdkp->capacity & 0x01) /* odd sizes are odd */ | |
1400 | --sdkp->capacity; | |
1401 | } | |
1402 | ||
1da177e4 LT |
1403 | got_data: |
1404 | if (sector_size == 0) { | |
1405 | sector_size = 512; | |
e73aec82 MP |
1406 | sd_printk(KERN_NOTICE, sdkp, "Sector size 0 reported, " |
1407 | "assuming 512.\n"); | |
1da177e4 LT |
1408 | } |
1409 | ||
1410 | if (sector_size != 512 && | |
1411 | sector_size != 1024 && | |
1412 | sector_size != 2048 && | |
1413 | sector_size != 4096 && | |
1414 | sector_size != 256) { | |
e73aec82 MP |
1415 | sd_printk(KERN_NOTICE, sdkp, "Unsupported sector size %d.\n", |
1416 | sector_size); | |
1da177e4 LT |
1417 | /* |
1418 | * The user might want to re-format the drive with | |
1419 | * a supported sectorsize. Once this happens, it | |
1420 | * would be relatively trivial to set the thing up. | |
1421 | * For this reason, we leave the thing in the table. | |
1422 | */ | |
1423 | sdkp->capacity = 0; | |
1424 | /* | |
1425 | * set a bogus sector size so the normal read/write | |
1426 | * logic in the block layer will eventually refuse any | |
1427 | * request on this device without tripping over power | |
1428 | * of two sector size assumptions | |
1429 | */ | |
1430 | sector_size = 512; | |
1431 | } | |
1432 | { | |
1433 | /* | |
1434 | * The msdos fs needs to know the hardware sector size | |
1435 | * So I have created this table. See ll_rw_blk.c | |
1436 | * Jacques Gelinas (Jacques@solucorp.qc.ca) | |
1437 | */ | |
1438 | int hard_sector = sector_size; | |
7a691bd3 | 1439 | sector_t sz = (sdkp->capacity/2) * (hard_sector/256); |
165125e1 | 1440 | struct request_queue *queue = sdp->request_queue; |
7a691bd3 | 1441 | sector_t mb = sz; |
1da177e4 LT |
1442 | |
1443 | blk_queue_hardsect_size(queue, hard_sector); | |
1444 | /* avoid 64-bit division on 32-bit platforms */ | |
7a691bd3 | 1445 | sector_div(sz, 625); |
1da177e4 LT |
1446 | mb -= sz - 974; |
1447 | sector_div(mb, 1950); | |
1448 | ||
e73aec82 MP |
1449 | sd_printk(KERN_NOTICE, sdkp, |
1450 | "%llu %d-byte hardware sectors (%llu MB)\n", | |
1451 | (unsigned long long)sdkp->capacity, | |
1452 | hard_sector, (unsigned long long)mb); | |
1da177e4 LT |
1453 | } |
1454 | ||
1455 | /* Rescale capacity to 512-byte units */ | |
1456 | if (sector_size == 4096) | |
1457 | sdkp->capacity <<= 3; | |
1458 | else if (sector_size == 2048) | |
1459 | sdkp->capacity <<= 2; | |
1460 | else if (sector_size == 1024) | |
1461 | sdkp->capacity <<= 1; | |
1462 | else if (sector_size == 256) | |
1463 | sdkp->capacity >>= 1; | |
1464 | ||
1465 | sdkp->device->sector_size = sector_size; | |
1466 | } | |
1467 | ||
1468 | /* called with buffer of length 512 */ | |
1469 | static inline int | |
ea73a9f2 JB |
1470 | sd_do_mode_sense(struct scsi_device *sdp, int dbd, int modepage, |
1471 | unsigned char *buffer, int len, struct scsi_mode_data *data, | |
1472 | struct scsi_sense_hdr *sshdr) | |
1da177e4 | 1473 | { |
ea73a9f2 | 1474 | return scsi_mode_sense(sdp, dbd, modepage, buffer, len, |
1cf72699 | 1475 | SD_TIMEOUT, SD_MAX_RETRIES, data, |
ea73a9f2 | 1476 | sshdr); |
1da177e4 LT |
1477 | } |
1478 | ||
1479 | /* | |
1480 | * read write protect setting, if possible - called only in sd_revalidate_disk() | |
48970800 | 1481 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
1482 | */ |
1483 | static void | |
e73aec82 | 1484 | sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer) |
ea73a9f2 | 1485 | { |
1da177e4 | 1486 | int res; |
ea73a9f2 | 1487 | struct scsi_device *sdp = sdkp->device; |
1da177e4 LT |
1488 | struct scsi_mode_data data; |
1489 | ||
1490 | set_disk_ro(sdkp->disk, 0); | |
ea73a9f2 | 1491 | if (sdp->skip_ms_page_3f) { |
e73aec82 | 1492 | sd_printk(KERN_NOTICE, sdkp, "Assuming Write Enabled\n"); |
1da177e4 LT |
1493 | return; |
1494 | } | |
1495 | ||
ea73a9f2 JB |
1496 | if (sdp->use_192_bytes_for_3f) { |
1497 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 192, &data, NULL); | |
1da177e4 LT |
1498 | } else { |
1499 | /* | |
1500 | * First attempt: ask for all pages (0x3F), but only 4 bytes. | |
1501 | * We have to start carefully: some devices hang if we ask | |
1502 | * for more than is available. | |
1503 | */ | |
ea73a9f2 | 1504 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 4, &data, NULL); |
1da177e4 LT |
1505 | |
1506 | /* | |
1507 | * Second attempt: ask for page 0 When only page 0 is | |
1508 | * implemented, a request for page 3F may return Sense Key | |
1509 | * 5: Illegal Request, Sense Code 24: Invalid field in | |
1510 | * CDB. | |
1511 | */ | |
1512 | if (!scsi_status_is_good(res)) | |
ea73a9f2 | 1513 | res = sd_do_mode_sense(sdp, 0, 0, buffer, 4, &data, NULL); |
1da177e4 LT |
1514 | |
1515 | /* | |
1516 | * Third attempt: ask 255 bytes, as we did earlier. | |
1517 | */ | |
1518 | if (!scsi_status_is_good(res)) | |
ea73a9f2 JB |
1519 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 255, |
1520 | &data, NULL); | |
1da177e4 LT |
1521 | } |
1522 | ||
1523 | if (!scsi_status_is_good(res)) { | |
e73aec82 MP |
1524 | sd_printk(KERN_WARNING, sdkp, |
1525 | "Test WP failed, assume Write Enabled\n"); | |
1da177e4 LT |
1526 | } else { |
1527 | sdkp->write_prot = ((data.device_specific & 0x80) != 0); | |
1528 | set_disk_ro(sdkp->disk, sdkp->write_prot); | |
e73aec82 MP |
1529 | sd_printk(KERN_NOTICE, sdkp, "Write Protect is %s\n", |
1530 | sdkp->write_prot ? "on" : "off"); | |
1531 | sd_printk(KERN_DEBUG, sdkp, | |
1532 | "Mode Sense: %02x %02x %02x %02x\n", | |
1533 | buffer[0], buffer[1], buffer[2], buffer[3]); | |
1da177e4 LT |
1534 | } |
1535 | } | |
1536 | ||
1537 | /* | |
1538 | * sd_read_cache_type - called only from sd_revalidate_disk() | |
48970800 | 1539 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
1540 | */ |
1541 | static void | |
e73aec82 | 1542 | sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer) |
631e8a13 | 1543 | { |
1da177e4 | 1544 | int len = 0, res; |
ea73a9f2 | 1545 | struct scsi_device *sdp = sdkp->device; |
1da177e4 | 1546 | |
631e8a13 AV |
1547 | int dbd; |
1548 | int modepage; | |
1da177e4 LT |
1549 | struct scsi_mode_data data; |
1550 | struct scsi_sense_hdr sshdr; | |
1551 | ||
ea73a9f2 | 1552 | if (sdp->skip_ms_page_8) |
1da177e4 LT |
1553 | goto defaults; |
1554 | ||
ea73a9f2 | 1555 | if (sdp->type == TYPE_RBC) { |
631e8a13 AV |
1556 | modepage = 6; |
1557 | dbd = 8; | |
1558 | } else { | |
1559 | modepage = 8; | |
1560 | dbd = 0; | |
1561 | } | |
1562 | ||
1da177e4 | 1563 | /* cautiously ask */ |
ea73a9f2 | 1564 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, 4, &data, &sshdr); |
1da177e4 LT |
1565 | |
1566 | if (!scsi_status_is_good(res)) | |
1567 | goto bad_sense; | |
1568 | ||
6d73c851 AV |
1569 | if (!data.header_length) { |
1570 | modepage = 6; | |
e73aec82 | 1571 | sd_printk(KERN_ERR, sdkp, "Missing header in MODE_SENSE response\n"); |
6d73c851 AV |
1572 | } |
1573 | ||
1da177e4 LT |
1574 | /* that went OK, now ask for the proper length */ |
1575 | len = data.length; | |
1576 | ||
1577 | /* | |
1578 | * We're only interested in the first three bytes, actually. | |
1579 | * But the data cache page is defined for the first 20. | |
1580 | */ | |
1581 | if (len < 3) | |
1582 | goto bad_sense; | |
1583 | if (len > 20) | |
1584 | len = 20; | |
1585 | ||
1586 | /* Take headers and block descriptors into account */ | |
1587 | len += data.header_length + data.block_descriptor_length; | |
48970800 AV |
1588 | if (len > SD_BUF_SIZE) |
1589 | goto bad_sense; | |
1da177e4 LT |
1590 | |
1591 | /* Get the data */ | |
ea73a9f2 | 1592 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, len, &data, &sshdr); |
1da177e4 LT |
1593 | |
1594 | if (scsi_status_is_good(res)) { | |
631e8a13 | 1595 | int offset = data.header_length + data.block_descriptor_length; |
1da177e4 | 1596 | |
48970800 | 1597 | if (offset >= SD_BUF_SIZE - 2) { |
e73aec82 | 1598 | sd_printk(KERN_ERR, sdkp, "Malformed MODE SENSE response\n"); |
48970800 AV |
1599 | goto defaults; |
1600 | } | |
1601 | ||
631e8a13 | 1602 | if ((buffer[offset] & 0x3f) != modepage) { |
e73aec82 | 1603 | sd_printk(KERN_ERR, sdkp, "Got wrong page\n"); |
631e8a13 AV |
1604 | goto defaults; |
1605 | } | |
1606 | ||
1607 | if (modepage == 8) { | |
1608 | sdkp->WCE = ((buffer[offset + 2] & 0x04) != 0); | |
1609 | sdkp->RCD = ((buffer[offset + 2] & 0x01) != 0); | |
1610 | } else { | |
1611 | sdkp->WCE = ((buffer[offset + 2] & 0x01) == 0); | |
1612 | sdkp->RCD = 0; | |
1613 | } | |
1da177e4 | 1614 | |
007365ad TH |
1615 | sdkp->DPOFUA = (data.device_specific & 0x10) != 0; |
1616 | if (sdkp->DPOFUA && !sdkp->device->use_10_for_rw) { | |
e73aec82 MP |
1617 | sd_printk(KERN_NOTICE, sdkp, |
1618 | "Uses READ/WRITE(6), disabling FUA\n"); | |
007365ad TH |
1619 | sdkp->DPOFUA = 0; |
1620 | } | |
1621 | ||
e73aec82 MP |
1622 | sd_printk(KERN_NOTICE, sdkp, |
1623 | "Write cache: %s, read cache: %s, %s\n", | |
fd44bab5 LT |
1624 | sdkp->WCE ? "enabled" : "disabled", |
1625 | sdkp->RCD ? "disabled" : "enabled", | |
1626 | sdkp->DPOFUA ? "supports DPO and FUA" | |
1627 | : "doesn't support DPO or FUA"); | |
1da177e4 LT |
1628 | |
1629 | return; | |
1630 | } | |
1631 | ||
1632 | bad_sense: | |
ea73a9f2 | 1633 | if (scsi_sense_valid(&sshdr) && |
1da177e4 LT |
1634 | sshdr.sense_key == ILLEGAL_REQUEST && |
1635 | sshdr.asc == 0x24 && sshdr.ascq == 0x0) | |
e73aec82 MP |
1636 | /* Invalid field in CDB */ |
1637 | sd_printk(KERN_NOTICE, sdkp, "Cache data unavailable\n"); | |
1da177e4 | 1638 | else |
e73aec82 | 1639 | sd_printk(KERN_ERR, sdkp, "Asking for cache data failed\n"); |
1da177e4 LT |
1640 | |
1641 | defaults: | |
e73aec82 | 1642 | sd_printk(KERN_ERR, sdkp, "Assuming drive cache: write through\n"); |
1da177e4 LT |
1643 | sdkp->WCE = 0; |
1644 | sdkp->RCD = 0; | |
48970800 | 1645 | sdkp->DPOFUA = 0; |
1da177e4 LT |
1646 | } |
1647 | ||
e0597d70 MP |
1648 | /* |
1649 | * The ATO bit indicates whether the DIF application tag is available | |
1650 | * for use by the operating system. | |
1651 | */ | |
1652 | void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer) | |
1653 | { | |
1654 | int res, offset; | |
1655 | struct scsi_device *sdp = sdkp->device; | |
1656 | struct scsi_mode_data data; | |
1657 | struct scsi_sense_hdr sshdr; | |
1658 | ||
1659 | if (sdp->type != TYPE_DISK) | |
1660 | return; | |
1661 | ||
1662 | if (sdkp->protection_type == 0) | |
1663 | return; | |
1664 | ||
1665 | res = scsi_mode_sense(sdp, 1, 0x0a, buffer, 36, SD_TIMEOUT, | |
1666 | SD_MAX_RETRIES, &data, &sshdr); | |
1667 | ||
1668 | if (!scsi_status_is_good(res) || !data.header_length || | |
1669 | data.length < 6) { | |
1670 | sd_printk(KERN_WARNING, sdkp, | |
1671 | "getting Control mode page failed, assume no ATO\n"); | |
1672 | ||
1673 | if (scsi_sense_valid(&sshdr)) | |
1674 | sd_print_sense_hdr(sdkp, &sshdr); | |
1675 | ||
1676 | return; | |
1677 | } | |
1678 | ||
1679 | offset = data.header_length + data.block_descriptor_length; | |
1680 | ||
1681 | if ((buffer[offset] & 0x3f) != 0x0a) { | |
1682 | sd_printk(KERN_ERR, sdkp, "ATO Got wrong page\n"); | |
1683 | return; | |
1684 | } | |
1685 | ||
1686 | if ((buffer[offset + 5] & 0x80) == 0) | |
1687 | return; | |
1688 | ||
1689 | sdkp->ATO = 1; | |
1690 | ||
1691 | return; | |
1692 | } | |
1693 | ||
1da177e4 LT |
1694 | /** |
1695 | * sd_revalidate_disk - called the first time a new disk is seen, | |
1696 | * performs disk spin up, read_capacity, etc. | |
1697 | * @disk: struct gendisk we care about | |
1698 | **/ | |
1699 | static int sd_revalidate_disk(struct gendisk *disk) | |
1700 | { | |
1701 | struct scsi_disk *sdkp = scsi_disk(disk); | |
1702 | struct scsi_device *sdp = sdkp->device; | |
1da177e4 | 1703 | unsigned char *buffer; |
461d4e90 | 1704 | unsigned ordered; |
1da177e4 | 1705 | |
fa0d34be MP |
1706 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, |
1707 | "sd_revalidate_disk\n")); | |
1da177e4 LT |
1708 | |
1709 | /* | |
1710 | * If the device is offline, don't try and read capacity or any | |
1711 | * of the other niceties. | |
1712 | */ | |
1713 | if (!scsi_device_online(sdp)) | |
1714 | goto out; | |
1715 | ||
a6123f14 | 1716 | buffer = kmalloc(SD_BUF_SIZE, GFP_KERNEL); |
1da177e4 | 1717 | if (!buffer) { |
e73aec82 MP |
1718 | sd_printk(KERN_WARNING, sdkp, "sd_revalidate_disk: Memory " |
1719 | "allocation failure.\n"); | |
ea73a9f2 | 1720 | goto out; |
1da177e4 LT |
1721 | } |
1722 | ||
1723 | /* defaults, until the device tells us otherwise */ | |
1724 | sdp->sector_size = 512; | |
1725 | sdkp->capacity = 0; | |
1726 | sdkp->media_present = 1; | |
1727 | sdkp->write_prot = 0; | |
1728 | sdkp->WCE = 0; | |
1729 | sdkp->RCD = 0; | |
e0597d70 | 1730 | sdkp->ATO = 0; |
1da177e4 | 1731 | |
e73aec82 | 1732 | sd_spinup_disk(sdkp); |
1da177e4 LT |
1733 | |
1734 | /* | |
1735 | * Without media there is no reason to ask; moreover, some devices | |
1736 | * react badly if we do. | |
1737 | */ | |
1738 | if (sdkp->media_present) { | |
e73aec82 MP |
1739 | sd_read_capacity(sdkp, buffer); |
1740 | sd_read_write_protect_flag(sdkp, buffer); | |
1741 | sd_read_cache_type(sdkp, buffer); | |
e0597d70 | 1742 | sd_read_app_tag_own(sdkp, buffer); |
1da177e4 | 1743 | } |
461d4e90 TH |
1744 | |
1745 | /* | |
1746 | * We now have all cache related info, determine how we deal | |
1747 | * with ordered requests. Note that as the current SCSI | |
1748 | * dispatch function can alter request order, we cannot use | |
1749 | * QUEUE_ORDERED_TAG_* even when ordered tag is supported. | |
1750 | */ | |
1751 | if (sdkp->WCE) | |
007365ad TH |
1752 | ordered = sdkp->DPOFUA |
1753 | ? QUEUE_ORDERED_DRAIN_FUA : QUEUE_ORDERED_DRAIN_FLUSH; | |
461d4e90 TH |
1754 | else |
1755 | ordered = QUEUE_ORDERED_DRAIN; | |
1756 | ||
1757 | blk_queue_ordered(sdkp->disk->queue, ordered, sd_prepare_flush); | |
1758 | ||
1da177e4 LT |
1759 | set_capacity(disk, sdkp->capacity); |
1760 | kfree(buffer); | |
1761 | ||
1da177e4 LT |
1762 | out: |
1763 | return 0; | |
1764 | } | |
1765 | ||
1766 | /** | |
1767 | * sd_probe - called during driver initialization and whenever a | |
1768 | * new scsi device is attached to the system. It is called once | |
1769 | * for each scsi device (not just disks) present. | |
1770 | * @dev: pointer to device object | |
1771 | * | |
1772 | * Returns 0 if successful (or not interested in this scsi device | |
1773 | * (e.g. scanner)); 1 when there is an error. | |
1774 | * | |
1775 | * Note: this function is invoked from the scsi mid-level. | |
1776 | * This function sets up the mapping between a given | |
1777 | * <host,channel,id,lun> (found in sdp) and new device name | |
1778 | * (e.g. /dev/sda). More precisely it is the block device major | |
1779 | * and minor number that is chosen here. | |
1780 | * | |
1781 | * Assume sd_attach is not re-entrant (for time being) | |
1782 | * Also think about sd_attach() and sd_remove() running coincidentally. | |
1783 | **/ | |
1784 | static int sd_probe(struct device *dev) | |
1785 | { | |
1786 | struct scsi_device *sdp = to_scsi_device(dev); | |
1787 | struct scsi_disk *sdkp; | |
1788 | struct gendisk *gd; | |
1789 | u32 index; | |
1790 | int error; | |
1791 | ||
1792 | error = -ENODEV; | |
631e8a13 | 1793 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_MOD && sdp->type != TYPE_RBC) |
1da177e4 LT |
1794 | goto out; |
1795 | ||
9ccfc756 JB |
1796 | SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO, sdp, |
1797 | "sd_attach\n")); | |
1da177e4 LT |
1798 | |
1799 | error = -ENOMEM; | |
24669f75 | 1800 | sdkp = kzalloc(sizeof(*sdkp), GFP_KERNEL); |
1da177e4 LT |
1801 | if (!sdkp) |
1802 | goto out; | |
1803 | ||
1da177e4 LT |
1804 | gd = alloc_disk(16); |
1805 | if (!gd) | |
1806 | goto out_free; | |
1807 | ||
f27bac27 TH |
1808 | do { |
1809 | if (!ida_pre_get(&sd_index_ida, GFP_KERNEL)) | |
1810 | goto out_put; | |
1da177e4 | 1811 | |
f27bac27 TH |
1812 | error = ida_get_new(&sd_index_ida, &index); |
1813 | } while (error == -EAGAIN); | |
1da177e4 | 1814 | |
1da177e4 LT |
1815 | if (error) |
1816 | goto out_put; | |
1817 | ||
f27bac27 TH |
1818 | error = -EBUSY; |
1819 | if (index >= SD_MAX_DISKS) | |
1820 | goto out_free_index; | |
1821 | ||
1da177e4 LT |
1822 | sdkp->device = sdp; |
1823 | sdkp->driver = &sd_template; | |
1824 | sdkp->disk = gd; | |
1825 | sdkp->index = index; | |
1826 | sdkp->openers = 0; | |
c02e6002 | 1827 | sdkp->previous_state = 1; |
1da177e4 LT |
1828 | |
1829 | if (!sdp->timeout) { | |
631e8a13 | 1830 | if (sdp->type != TYPE_MOD) |
1da177e4 LT |
1831 | sdp->timeout = SD_TIMEOUT; |
1832 | else | |
1833 | sdp->timeout = SD_MOD_TIMEOUT; | |
1834 | } | |
1835 | ||
ee959b00 TJ |
1836 | device_initialize(&sdkp->dev); |
1837 | sdkp->dev.parent = &sdp->sdev_gendev; | |
1838 | sdkp->dev.class = &sd_disk_class; | |
1839 | strncpy(sdkp->dev.bus_id, sdp->sdev_gendev.bus_id, BUS_ID_SIZE); | |
017f2e37 | 1840 | |
ee959b00 | 1841 | if (device_add(&sdkp->dev)) |
f27bac27 | 1842 | goto out_free_index; |
017f2e37 NST |
1843 | |
1844 | get_device(&sdp->sdev_gendev); | |
1845 | ||
1da177e4 LT |
1846 | gd->major = sd_major((index & 0xf0) >> 4); |
1847 | gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00); | |
1848 | gd->minors = 16; | |
1849 | gd->fops = &sd_fops; | |
1850 | ||
1851 | if (index < 26) { | |
1852 | sprintf(gd->disk_name, "sd%c", 'a' + index % 26); | |
1853 | } else if (index < (26 + 1) * 26) { | |
1854 | sprintf(gd->disk_name, "sd%c%c", | |
1855 | 'a' + index / 26 - 1,'a' + index % 26); | |
1856 | } else { | |
1857 | const unsigned int m1 = (index / 26 - 1) / 26 - 1; | |
1858 | const unsigned int m2 = (index / 26 - 1) % 26; | |
1859 | const unsigned int m3 = index % 26; | |
1860 | sprintf(gd->disk_name, "sd%c%c%c", | |
1861 | 'a' + m1, 'a' + m2, 'a' + m3); | |
1862 | } | |
1863 | ||
1da177e4 | 1864 | gd->private_data = &sdkp->driver; |
461d4e90 | 1865 | gd->queue = sdkp->device->request_queue; |
1da177e4 LT |
1866 | |
1867 | sd_revalidate_disk(gd); | |
1868 | ||
7f9a6bc4 | 1869 | blk_queue_prep_rq(sdp->request_queue, sd_prep_fn); |
03a5743a | 1870 | |
1da177e4 LT |
1871 | gd->driverfs_dev = &sdp->sdev_gendev; |
1872 | gd->flags = GENHD_FL_DRIVERFS; | |
1873 | if (sdp->removable) | |
1874 | gd->flags |= GENHD_FL_REMOVABLE; | |
1da177e4 LT |
1875 | |
1876 | dev_set_drvdata(dev, sdkp); | |
1877 | add_disk(gd); | |
af55ff67 | 1878 | sd_dif_config_host(sdkp); |
1da177e4 | 1879 | |
e73aec82 MP |
1880 | sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n", |
1881 | sdp->removable ? "removable " : ""); | |
1da177e4 LT |
1882 | |
1883 | return 0; | |
1884 | ||
f27bac27 TH |
1885 | out_free_index: |
1886 | ida_remove(&sd_index_ida, index); | |
6bdaa1f1 | 1887 | out_put: |
1da177e4 | 1888 | put_disk(gd); |
6bdaa1f1 | 1889 | out_free: |
1da177e4 | 1890 | kfree(sdkp); |
6bdaa1f1 | 1891 | out: |
1da177e4 LT |
1892 | return error; |
1893 | } | |
1894 | ||
1895 | /** | |
1896 | * sd_remove - called whenever a scsi disk (previously recognized by | |
1897 | * sd_probe) is detached from the system. It is called (potentially | |
1898 | * multiple times) during sd module unload. | |
1899 | * @sdp: pointer to mid level scsi device object | |
1900 | * | |
1901 | * Note: this function is invoked from the scsi mid-level. | |
1902 | * This function potentially frees up a device name (e.g. /dev/sdc) | |
1903 | * that could be re-used by a subsequent sd_probe(). | |
1904 | * This function is not called when the built-in sd driver is "exit-ed". | |
1905 | **/ | |
1906 | static int sd_remove(struct device *dev) | |
1907 | { | |
1908 | struct scsi_disk *sdkp = dev_get_drvdata(dev); | |
1909 | ||
ee959b00 | 1910 | device_del(&sdkp->dev); |
1da177e4 LT |
1911 | del_gendisk(sdkp->disk); |
1912 | sd_shutdown(dev); | |
39b7f1e2 | 1913 | |
0b950672 | 1914 | mutex_lock(&sd_ref_mutex); |
39b7f1e2 | 1915 | dev_set_drvdata(dev, NULL); |
ee959b00 | 1916 | put_device(&sdkp->dev); |
0b950672 | 1917 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
1918 | |
1919 | return 0; | |
1920 | } | |
1921 | ||
1922 | /** | |
1923 | * scsi_disk_release - Called to free the scsi_disk structure | |
ee959b00 | 1924 | * @dev: pointer to embedded class device |
1da177e4 | 1925 | * |
0b950672 | 1926 | * sd_ref_mutex must be held entering this routine. Because it is |
1da177e4 LT |
1927 | * called on last put, you should always use the scsi_disk_get() |
1928 | * scsi_disk_put() helpers which manipulate the semaphore directly | |
ee959b00 | 1929 | * and never do a direct put_device. |
1da177e4 | 1930 | **/ |
ee959b00 | 1931 | static void scsi_disk_release(struct device *dev) |
1da177e4 | 1932 | { |
ee959b00 | 1933 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
1da177e4 LT |
1934 | struct gendisk *disk = sdkp->disk; |
1935 | ||
f27bac27 | 1936 | ida_remove(&sd_index_ida, sdkp->index); |
1da177e4 LT |
1937 | |
1938 | disk->private_data = NULL; | |
1da177e4 | 1939 | put_disk(disk); |
39b7f1e2 | 1940 | put_device(&sdkp->device->sdev_gendev); |
1da177e4 LT |
1941 | |
1942 | kfree(sdkp); | |
1943 | } | |
1944 | ||
cc5d2c8c | 1945 | static int sd_start_stop_device(struct scsi_disk *sdkp, int start) |
c3c94c5a TH |
1946 | { |
1947 | unsigned char cmd[6] = { START_STOP }; /* START_VALID */ | |
1948 | struct scsi_sense_hdr sshdr; | |
cc5d2c8c | 1949 | struct scsi_device *sdp = sdkp->device; |
c3c94c5a TH |
1950 | int res; |
1951 | ||
1952 | if (start) | |
1953 | cmd[4] |= 1; /* START */ | |
1954 | ||
d2886ea3 SR |
1955 | if (sdp->start_stop_pwr_cond) |
1956 | cmd[4] |= start ? 1 << 4 : 3 << 4; /* Active or Standby */ | |
1957 | ||
c3c94c5a TH |
1958 | if (!scsi_device_online(sdp)) |
1959 | return -ENODEV; | |
1960 | ||
1961 | res = scsi_execute_req(sdp, cmd, DMA_NONE, NULL, 0, &sshdr, | |
1962 | SD_TIMEOUT, SD_MAX_RETRIES); | |
1963 | if (res) { | |
cc5d2c8c JB |
1964 | sd_printk(KERN_WARNING, sdkp, "START_STOP FAILED\n"); |
1965 | sd_print_result(sdkp, res); | |
c3c94c5a | 1966 | if (driver_byte(res) & DRIVER_SENSE) |
cc5d2c8c | 1967 | sd_print_sense_hdr(sdkp, &sshdr); |
c3c94c5a TH |
1968 | } |
1969 | ||
1970 | return res; | |
1971 | } | |
1972 | ||
1da177e4 LT |
1973 | /* |
1974 | * Send a SYNCHRONIZE CACHE instruction down to the device through | |
1975 | * the normal SCSI command structure. Wait for the command to | |
1976 | * complete. | |
1977 | */ | |
1978 | static void sd_shutdown(struct device *dev) | |
1979 | { | |
39b7f1e2 | 1980 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
1da177e4 LT |
1981 | |
1982 | if (!sdkp) | |
1983 | return; /* this can happen */ | |
1984 | ||
39b7f1e2 | 1985 | if (sdkp->WCE) { |
e73aec82 MP |
1986 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
1987 | sd_sync_cache(sdkp); | |
39b7f1e2 | 1988 | } |
c3c94c5a | 1989 | |
cc5d2c8c JB |
1990 | if (system_state != SYSTEM_RESTART && sdkp->device->manage_start_stop) { |
1991 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); | |
1992 | sd_start_stop_device(sdkp, 0); | |
c3c94c5a TH |
1993 | } |
1994 | ||
39b7f1e2 AS |
1995 | scsi_disk_put(sdkp); |
1996 | } | |
1da177e4 | 1997 | |
c3c94c5a TH |
1998 | static int sd_suspend(struct device *dev, pm_message_t mesg) |
1999 | { | |
c3c94c5a | 2000 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
09ff92fe | 2001 | int ret = 0; |
c3c94c5a TH |
2002 | |
2003 | if (!sdkp) | |
2004 | return 0; /* this can happen */ | |
2005 | ||
2006 | if (sdkp->WCE) { | |
cc5d2c8c | 2007 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
c3c94c5a TH |
2008 | ret = sd_sync_cache(sdkp); |
2009 | if (ret) | |
09ff92fe | 2010 | goto done; |
c3c94c5a TH |
2011 | } |
2012 | ||
3a2d5b70 | 2013 | if ((mesg.event & PM_EVENT_SLEEP) && sdkp->device->manage_start_stop) { |
cc5d2c8c JB |
2014 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); |
2015 | ret = sd_start_stop_device(sdkp, 0); | |
c3c94c5a TH |
2016 | } |
2017 | ||
09ff92fe AS |
2018 | done: |
2019 | scsi_disk_put(sdkp); | |
2020 | return ret; | |
c3c94c5a TH |
2021 | } |
2022 | ||
2023 | static int sd_resume(struct device *dev) | |
2024 | { | |
c3c94c5a | 2025 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
09ff92fe | 2026 | int ret = 0; |
c3c94c5a | 2027 | |
cc5d2c8c | 2028 | if (!sdkp->device->manage_start_stop) |
09ff92fe | 2029 | goto done; |
c3c94c5a | 2030 | |
cc5d2c8c | 2031 | sd_printk(KERN_NOTICE, sdkp, "Starting disk\n"); |
09ff92fe | 2032 | ret = sd_start_stop_device(sdkp, 1); |
c3c94c5a | 2033 | |
09ff92fe AS |
2034 | done: |
2035 | scsi_disk_put(sdkp); | |
2036 | return ret; | |
c3c94c5a TH |
2037 | } |
2038 | ||
1da177e4 LT |
2039 | /** |
2040 | * init_sd - entry point for this driver (both when built in or when | |
2041 | * a module). | |
2042 | * | |
2043 | * Note: this function registers this driver with the scsi mid-level. | |
2044 | **/ | |
2045 | static int __init init_sd(void) | |
2046 | { | |
5e4009ba | 2047 | int majors = 0, i, err; |
1da177e4 LT |
2048 | |
2049 | SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n")); | |
2050 | ||
2051 | for (i = 0; i < SD_MAJORS; i++) | |
2052 | if (register_blkdev(sd_major(i), "sd") == 0) | |
2053 | majors++; | |
2054 | ||
2055 | if (!majors) | |
2056 | return -ENODEV; | |
2057 | ||
5e4009ba JG |
2058 | err = class_register(&sd_disk_class); |
2059 | if (err) | |
2060 | goto err_out; | |
6bdaa1f1 | 2061 | |
5e4009ba JG |
2062 | err = scsi_register_driver(&sd_template.gendrv); |
2063 | if (err) | |
2064 | goto err_out_class; | |
2065 | ||
2066 | return 0; | |
2067 | ||
2068 | err_out_class: | |
2069 | class_unregister(&sd_disk_class); | |
2070 | err_out: | |
2071 | for (i = 0; i < SD_MAJORS; i++) | |
2072 | unregister_blkdev(sd_major(i), "sd"); | |
2073 | return err; | |
1da177e4 LT |
2074 | } |
2075 | ||
2076 | /** | |
2077 | * exit_sd - exit point for this driver (when it is a module). | |
2078 | * | |
2079 | * Note: this function unregisters this driver from the scsi mid-level. | |
2080 | **/ | |
2081 | static void __exit exit_sd(void) | |
2082 | { | |
2083 | int i; | |
2084 | ||
2085 | SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n")); | |
2086 | ||
2087 | scsi_unregister_driver(&sd_template.gendrv); | |
5e4009ba JG |
2088 | class_unregister(&sd_disk_class); |
2089 | ||
1da177e4 LT |
2090 | for (i = 0; i < SD_MAJORS; i++) |
2091 | unregister_blkdev(sd_major(i), "sd"); | |
2092 | } | |
2093 | ||
1da177e4 LT |
2094 | module_init(init_sd); |
2095 | module_exit(exit_sd); | |
e73aec82 MP |
2096 | |
2097 | static void sd_print_sense_hdr(struct scsi_disk *sdkp, | |
2098 | struct scsi_sense_hdr *sshdr) | |
2099 | { | |
2100 | sd_printk(KERN_INFO, sdkp, ""); | |
2101 | scsi_show_sense_hdr(sshdr); | |
2102 | sd_printk(KERN_INFO, sdkp, ""); | |
2103 | scsi_show_extd_sense(sshdr->asc, sshdr->ascq); | |
2104 | } | |
2105 | ||
2106 | static void sd_print_result(struct scsi_disk *sdkp, int result) | |
2107 | { | |
2108 | sd_printk(KERN_INFO, sdkp, ""); | |
2109 | scsi_show_result(result); | |
2110 | } | |
2111 |