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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 | |
f615b48c | 89 | #define SD_PARTS 64 |
870d6656 TH |
90 | |
91 | #if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT) | |
f615b48c | 92 | #define SD_MINORS 16 |
870d6656 TH |
93 | #else |
94 | #define SD_MINORS 1 | |
95 | #endif | |
96 | ||
f615b48c TH |
97 | #define SD_EXT_MINORS (SD_PARTS - SD_MINORS) |
98 | ||
7b3d9545 LT |
99 | static int sd_revalidate_disk(struct gendisk *); |
100 | static int sd_probe(struct device *); | |
101 | static int sd_remove(struct device *); | |
102 | static void sd_shutdown(struct device *); | |
103 | static int sd_suspend(struct device *, pm_message_t state); | |
104 | static int sd_resume(struct device *); | |
105 | static void sd_rescan(struct device *); | |
106 | static int sd_done(struct scsi_cmnd *); | |
107 | static void sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer); | |
ee959b00 | 108 | static void scsi_disk_release(struct device *cdev); |
7b3d9545 LT |
109 | static void sd_print_sense_hdr(struct scsi_disk *, struct scsi_sense_hdr *); |
110 | static void sd_print_result(struct scsi_disk *, int); | |
111 | ||
f27bac27 | 112 | static DEFINE_IDA(sd_index_ida); |
1da177e4 LT |
113 | |
114 | /* This semaphore is used to mediate the 0->1 reference get in the | |
115 | * face of object destruction (i.e. we can't allow a get on an | |
116 | * object after last put) */ | |
0b950672 | 117 | static DEFINE_MUTEX(sd_ref_mutex); |
1da177e4 | 118 | |
6bdaa1f1 JB |
119 | static const char *sd_cache_types[] = { |
120 | "write through", "none", "write back", | |
121 | "write back, no read (daft)" | |
122 | }; | |
123 | ||
ee959b00 TJ |
124 | static ssize_t |
125 | sd_store_cache_type(struct device *dev, struct device_attribute *attr, | |
126 | const char *buf, size_t count) | |
6bdaa1f1 JB |
127 | { |
128 | int i, ct = -1, rcd, wce, sp; | |
ee959b00 | 129 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
130 | struct scsi_device *sdp = sdkp->device; |
131 | char buffer[64]; | |
132 | char *buffer_data; | |
133 | struct scsi_mode_data data; | |
134 | struct scsi_sense_hdr sshdr; | |
135 | int len; | |
136 | ||
137 | if (sdp->type != TYPE_DISK) | |
138 | /* no cache control on RBC devices; theoretically they | |
139 | * can do it, but there's probably so many exceptions | |
140 | * it's not worth the risk */ | |
141 | return -EINVAL; | |
142 | ||
6391a113 | 143 | for (i = 0; i < ARRAY_SIZE(sd_cache_types); i++) { |
6bdaa1f1 JB |
144 | const int len = strlen(sd_cache_types[i]); |
145 | if (strncmp(sd_cache_types[i], buf, len) == 0 && | |
146 | buf[len] == '\n') { | |
147 | ct = i; | |
148 | break; | |
149 | } | |
150 | } | |
151 | if (ct < 0) | |
152 | return -EINVAL; | |
153 | rcd = ct & 0x01 ? 1 : 0; | |
154 | wce = ct & 0x02 ? 1 : 0; | |
155 | if (scsi_mode_sense(sdp, 0x08, 8, buffer, sizeof(buffer), SD_TIMEOUT, | |
156 | SD_MAX_RETRIES, &data, NULL)) | |
157 | return -EINVAL; | |
a9312fb8 | 158 | len = min_t(size_t, sizeof(buffer), data.length - data.header_length - |
6bdaa1f1 JB |
159 | data.block_descriptor_length); |
160 | buffer_data = buffer + data.header_length + | |
161 | data.block_descriptor_length; | |
162 | buffer_data[2] &= ~0x05; | |
163 | buffer_data[2] |= wce << 2 | rcd; | |
164 | sp = buffer_data[0] & 0x80 ? 1 : 0; | |
165 | ||
166 | if (scsi_mode_select(sdp, 1, sp, 8, buffer_data, len, SD_TIMEOUT, | |
167 | SD_MAX_RETRIES, &data, &sshdr)) { | |
168 | if (scsi_sense_valid(&sshdr)) | |
e73aec82 | 169 | sd_print_sense_hdr(sdkp, &sshdr); |
6bdaa1f1 JB |
170 | return -EINVAL; |
171 | } | |
172 | sd_revalidate_disk(sdkp->disk); | |
173 | return count; | |
174 | } | |
175 | ||
ee959b00 TJ |
176 | static ssize_t |
177 | sd_store_manage_start_stop(struct device *dev, struct device_attribute *attr, | |
178 | const char *buf, size_t count) | |
c3c94c5a | 179 | { |
ee959b00 | 180 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
c3c94c5a TH |
181 | struct scsi_device *sdp = sdkp->device; |
182 | ||
183 | if (!capable(CAP_SYS_ADMIN)) | |
184 | return -EACCES; | |
185 | ||
186 | sdp->manage_start_stop = simple_strtoul(buf, NULL, 10); | |
187 | ||
188 | return count; | |
189 | } | |
190 | ||
ee959b00 TJ |
191 | static ssize_t |
192 | sd_store_allow_restart(struct device *dev, struct device_attribute *attr, | |
193 | const char *buf, size_t count) | |
a144c5ae | 194 | { |
ee959b00 | 195 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
a144c5ae BK |
196 | struct scsi_device *sdp = sdkp->device; |
197 | ||
198 | if (!capable(CAP_SYS_ADMIN)) | |
199 | return -EACCES; | |
200 | ||
201 | if (sdp->type != TYPE_DISK) | |
202 | return -EINVAL; | |
203 | ||
204 | sdp->allow_restart = simple_strtoul(buf, NULL, 10); | |
205 | ||
206 | return count; | |
207 | } | |
208 | ||
ee959b00 TJ |
209 | static ssize_t |
210 | sd_show_cache_type(struct device *dev, struct device_attribute *attr, | |
211 | char *buf) | |
6bdaa1f1 | 212 | { |
ee959b00 | 213 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
214 | int ct = sdkp->RCD + 2*sdkp->WCE; |
215 | ||
216 | return snprintf(buf, 40, "%s\n", sd_cache_types[ct]); | |
217 | } | |
218 | ||
ee959b00 TJ |
219 | static ssize_t |
220 | sd_show_fua(struct device *dev, struct device_attribute *attr, char *buf) | |
6bdaa1f1 | 221 | { |
ee959b00 | 222 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
6bdaa1f1 JB |
223 | |
224 | return snprintf(buf, 20, "%u\n", sdkp->DPOFUA); | |
225 | } | |
226 | ||
ee959b00 TJ |
227 | static ssize_t |
228 | sd_show_manage_start_stop(struct device *dev, struct device_attribute *attr, | |
229 | char *buf) | |
c3c94c5a | 230 | { |
ee959b00 | 231 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
c3c94c5a TH |
232 | struct scsi_device *sdp = sdkp->device; |
233 | ||
234 | return snprintf(buf, 20, "%u\n", sdp->manage_start_stop); | |
235 | } | |
236 | ||
ee959b00 TJ |
237 | static ssize_t |
238 | sd_show_allow_restart(struct device *dev, struct device_attribute *attr, | |
239 | char *buf) | |
a144c5ae | 240 | { |
ee959b00 | 241 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
a144c5ae BK |
242 | |
243 | return snprintf(buf, 40, "%d\n", sdkp->device->allow_restart); | |
244 | } | |
245 | ||
e0597d70 MP |
246 | static ssize_t |
247 | sd_show_protection_type(struct device *dev, struct device_attribute *attr, | |
248 | char *buf) | |
249 | { | |
250 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
251 | ||
252 | return snprintf(buf, 20, "%u\n", sdkp->protection_type); | |
253 | } | |
254 | ||
255 | static ssize_t | |
256 | sd_show_app_tag_own(struct device *dev, struct device_attribute *attr, | |
257 | char *buf) | |
258 | { | |
259 | struct scsi_disk *sdkp = to_scsi_disk(dev); | |
260 | ||
261 | return snprintf(buf, 20, "%u\n", sdkp->ATO); | |
262 | } | |
263 | ||
ee959b00 | 264 | static struct device_attribute sd_disk_attrs[] = { |
6bdaa1f1 JB |
265 | __ATTR(cache_type, S_IRUGO|S_IWUSR, sd_show_cache_type, |
266 | sd_store_cache_type), | |
267 | __ATTR(FUA, S_IRUGO, sd_show_fua, NULL), | |
a144c5ae BK |
268 | __ATTR(allow_restart, S_IRUGO|S_IWUSR, sd_show_allow_restart, |
269 | sd_store_allow_restart), | |
c3c94c5a TH |
270 | __ATTR(manage_start_stop, S_IRUGO|S_IWUSR, sd_show_manage_start_stop, |
271 | sd_store_manage_start_stop), | |
e0597d70 MP |
272 | __ATTR(protection_type, S_IRUGO, sd_show_protection_type, NULL), |
273 | __ATTR(app_tag_own, S_IRUGO, sd_show_app_tag_own, NULL), | |
6bdaa1f1 JB |
274 | __ATTR_NULL, |
275 | }; | |
276 | ||
277 | static struct class sd_disk_class = { | |
278 | .name = "scsi_disk", | |
279 | .owner = THIS_MODULE, | |
ee959b00 TJ |
280 | .dev_release = scsi_disk_release, |
281 | .dev_attrs = sd_disk_attrs, | |
6bdaa1f1 | 282 | }; |
1da177e4 LT |
283 | |
284 | static struct scsi_driver sd_template = { | |
285 | .owner = THIS_MODULE, | |
286 | .gendrv = { | |
287 | .name = "sd", | |
288 | .probe = sd_probe, | |
289 | .remove = sd_remove, | |
c3c94c5a TH |
290 | .suspend = sd_suspend, |
291 | .resume = sd_resume, | |
1da177e4 LT |
292 | .shutdown = sd_shutdown, |
293 | }, | |
294 | .rescan = sd_rescan, | |
7b3d9545 | 295 | .done = sd_done, |
1da177e4 LT |
296 | }; |
297 | ||
298 | /* | |
299 | * Device no to disk mapping: | |
300 | * | |
301 | * major disc2 disc p1 | |
302 | * |............|.............|....|....| <- dev_t | |
303 | * 31 20 19 8 7 4 3 0 | |
304 | * | |
305 | * Inside a major, we have 16k disks, however mapped non- | |
306 | * contiguously. The first 16 disks are for major0, the next | |
307 | * ones with major1, ... Disk 256 is for major0 again, disk 272 | |
308 | * for major1, ... | |
309 | * As we stay compatible with our numbering scheme, we can reuse | |
310 | * the well-know SCSI majors 8, 65--71, 136--143. | |
311 | */ | |
312 | static int sd_major(int major_idx) | |
313 | { | |
314 | switch (major_idx) { | |
315 | case 0: | |
316 | return SCSI_DISK0_MAJOR; | |
317 | case 1 ... 7: | |
318 | return SCSI_DISK1_MAJOR + major_idx - 1; | |
319 | case 8 ... 15: | |
320 | return SCSI_DISK8_MAJOR + major_idx - 8; | |
321 | default: | |
322 | BUG(); | |
323 | return 0; /* shut up gcc */ | |
324 | } | |
325 | } | |
326 | ||
39b7f1e2 | 327 | static struct scsi_disk *__scsi_disk_get(struct gendisk *disk) |
1da177e4 LT |
328 | { |
329 | struct scsi_disk *sdkp = NULL; | |
330 | ||
39b7f1e2 AS |
331 | if (disk->private_data) { |
332 | sdkp = scsi_disk(disk); | |
333 | if (scsi_device_get(sdkp->device) == 0) | |
ee959b00 | 334 | get_device(&sdkp->dev); |
39b7f1e2 AS |
335 | else |
336 | sdkp = NULL; | |
337 | } | |
338 | return sdkp; | |
339 | } | |
340 | ||
341 | static struct scsi_disk *scsi_disk_get(struct gendisk *disk) | |
342 | { | |
343 | struct scsi_disk *sdkp; | |
344 | ||
0b950672 | 345 | mutex_lock(&sd_ref_mutex); |
39b7f1e2 | 346 | sdkp = __scsi_disk_get(disk); |
0b950672 | 347 | mutex_unlock(&sd_ref_mutex); |
1da177e4 | 348 | return sdkp; |
39b7f1e2 | 349 | } |
1da177e4 | 350 | |
39b7f1e2 AS |
351 | static struct scsi_disk *scsi_disk_get_from_dev(struct device *dev) |
352 | { | |
353 | struct scsi_disk *sdkp; | |
354 | ||
0b950672 | 355 | mutex_lock(&sd_ref_mutex); |
39b7f1e2 AS |
356 | sdkp = dev_get_drvdata(dev); |
357 | if (sdkp) | |
358 | sdkp = __scsi_disk_get(sdkp->disk); | |
0b950672 | 359 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
360 | return sdkp; |
361 | } | |
362 | ||
363 | static void scsi_disk_put(struct scsi_disk *sdkp) | |
364 | { | |
365 | struct scsi_device *sdev = sdkp->device; | |
366 | ||
0b950672 | 367 | mutex_lock(&sd_ref_mutex); |
ee959b00 | 368 | put_device(&sdkp->dev); |
1da177e4 | 369 | scsi_device_put(sdev); |
0b950672 | 370 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
371 | } |
372 | ||
373 | /** | |
374 | * sd_init_command - build a scsi (read or write) command from | |
375 | * information in the request structure. | |
376 | * @SCpnt: pointer to mid-level's per scsi command structure that | |
377 | * contains request and into which the scsi command is written | |
378 | * | |
379 | * Returns 1 if successful and 0 if error (or cannot be done now). | |
380 | **/ | |
7f9a6bc4 | 381 | static int sd_prep_fn(struct request_queue *q, struct request *rq) |
1da177e4 | 382 | { |
7f9a6bc4 JB |
383 | struct scsi_cmnd *SCpnt; |
384 | struct scsi_device *sdp = q->queuedata; | |
776b23a0 | 385 | struct gendisk *disk = rq->rq_disk; |
af55ff67 | 386 | struct scsi_disk *sdkp; |
776b23a0 | 387 | sector_t block = rq->sector; |
18351070 | 388 | sector_t threshold; |
7f9a6bc4 | 389 | unsigned int this_count = rq->nr_sectors; |
776b23a0 | 390 | unsigned int timeout = sdp->timeout; |
7f9a6bc4 JB |
391 | int ret; |
392 | ||
393 | if (rq->cmd_type == REQ_TYPE_BLOCK_PC) { | |
394 | ret = scsi_setup_blk_pc_cmnd(sdp, rq); | |
395 | goto out; | |
396 | } else if (rq->cmd_type != REQ_TYPE_FS) { | |
397 | ret = BLKPREP_KILL; | |
398 | goto out; | |
399 | } | |
400 | ret = scsi_setup_fs_cmnd(sdp, rq); | |
401 | if (ret != BLKPREP_OK) | |
402 | goto out; | |
403 | SCpnt = rq->special; | |
af55ff67 | 404 | sdkp = scsi_disk(disk); |
7f9a6bc4 JB |
405 | |
406 | /* from here on until we're complete, any goto out | |
407 | * is used for a killable error condition */ | |
408 | ret = BLKPREP_KILL; | |
1da177e4 | 409 | |
fa0d34be MP |
410 | SCSI_LOG_HLQUEUE(1, scmd_printk(KERN_INFO, SCpnt, |
411 | "sd_init_command: block=%llu, " | |
412 | "count=%d\n", | |
413 | (unsigned long long)block, | |
414 | this_count)); | |
1da177e4 LT |
415 | |
416 | if (!sdp || !scsi_device_online(sdp) || | |
417 | block + rq->nr_sectors > get_capacity(disk)) { | |
fa0d34be MP |
418 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
419 | "Finishing %ld sectors\n", | |
420 | rq->nr_sectors)); | |
421 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, | |
422 | "Retry with 0x%p\n", SCpnt)); | |
7f9a6bc4 | 423 | goto out; |
1da177e4 LT |
424 | } |
425 | ||
426 | if (sdp->changed) { | |
427 | /* | |
428 | * quietly refuse to do anything to a changed disc until | |
429 | * the changed bit has been reset | |
430 | */ | |
431 | /* printk("SCSI disk has been changed. Prohibiting further I/O.\n"); */ | |
7f9a6bc4 | 432 | goto out; |
1da177e4 | 433 | } |
7f9a6bc4 | 434 | |
a0899d4d | 435 | /* |
18351070 LT |
436 | * Some SD card readers can't handle multi-sector accesses which touch |
437 | * the last one or two hardware sectors. Split accesses as needed. | |
a0899d4d | 438 | */ |
18351070 LT |
439 | threshold = get_capacity(disk) - SD_LAST_BUGGY_SECTORS * |
440 | (sdp->sector_size / 512); | |
441 | ||
442 | if (unlikely(sdp->last_sector_bug && block + this_count > threshold)) { | |
443 | if (block < threshold) { | |
444 | /* Access up to the threshold but not beyond */ | |
445 | this_count = threshold - block; | |
446 | } else { | |
447 | /* Access only a single hardware sector */ | |
448 | this_count = sdp->sector_size / 512; | |
449 | } | |
450 | } | |
a0899d4d | 451 | |
fa0d34be MP |
452 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, "block=%llu\n", |
453 | (unsigned long long)block)); | |
1da177e4 LT |
454 | |
455 | /* | |
456 | * If we have a 1K hardware sectorsize, prevent access to single | |
457 | * 512 byte sectors. In theory we could handle this - in fact | |
458 | * the scsi cdrom driver must be able to handle this because | |
459 | * we typically use 1K blocksizes, and cdroms typically have | |
460 | * 2K hardware sectorsizes. Of course, things are simpler | |
461 | * with the cdrom, since it is read-only. For performance | |
462 | * reasons, the filesystems should be able to handle this | |
463 | * and not force the scsi disk driver to use bounce buffers | |
464 | * for this. | |
465 | */ | |
466 | if (sdp->sector_size == 1024) { | |
467 | if ((block & 1) || (rq->nr_sectors & 1)) { | |
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 >> 1; | |
473 | this_count = this_count >> 1; | |
474 | } | |
475 | } | |
476 | if (sdp->sector_size == 2048) { | |
477 | if ((block & 3) || (rq->nr_sectors & 3)) { | |
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 >> 2; | |
483 | this_count = this_count >> 2; | |
484 | } | |
485 | } | |
486 | if (sdp->sector_size == 4096) { | |
487 | if ((block & 7) || (rq->nr_sectors & 7)) { | |
e73aec82 MP |
488 | scmd_printk(KERN_ERR, SCpnt, |
489 | "Bad block number requested\n"); | |
7f9a6bc4 | 490 | goto out; |
1da177e4 LT |
491 | } else { |
492 | block = block >> 3; | |
493 | this_count = this_count >> 3; | |
494 | } | |
495 | } | |
496 | if (rq_data_dir(rq) == WRITE) { | |
497 | if (!sdp->writeable) { | |
7f9a6bc4 | 498 | goto out; |
1da177e4 LT |
499 | } |
500 | SCpnt->cmnd[0] = WRITE_6; | |
501 | SCpnt->sc_data_direction = DMA_TO_DEVICE; | |
af55ff67 MP |
502 | |
503 | if (blk_integrity_rq(rq) && | |
504 | sd_dif_prepare(rq, block, sdp->sector_size) == -EIO) | |
505 | goto out; | |
506 | ||
1da177e4 LT |
507 | } else if (rq_data_dir(rq) == READ) { |
508 | SCpnt->cmnd[0] = READ_6; | |
509 | SCpnt->sc_data_direction = DMA_FROM_DEVICE; | |
510 | } else { | |
e73aec82 | 511 | scmd_printk(KERN_ERR, SCpnt, "Unknown command %x\n", rq->cmd_flags); |
7f9a6bc4 | 512 | goto out; |
1da177e4 LT |
513 | } |
514 | ||
fa0d34be MP |
515 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
516 | "%s %d/%ld 512 byte blocks.\n", | |
517 | (rq_data_dir(rq) == WRITE) ? | |
518 | "writing" : "reading", this_count, | |
519 | rq->nr_sectors)); | |
1da177e4 | 520 | |
af55ff67 MP |
521 | /* Set RDPROTECT/WRPROTECT if disk is formatted with DIF */ |
522 | if (scsi_host_dif_capable(sdp->host, sdkp->protection_type)) | |
523 | SCpnt->cmnd[1] = 1 << 5; | |
524 | else | |
525 | SCpnt->cmnd[1] = 0; | |
526 | ||
1da177e4 LT |
527 | if (block > 0xffffffff) { |
528 | SCpnt->cmnd[0] += READ_16 - READ_6; | |
007365ad | 529 | SCpnt->cmnd[1] |= blk_fua_rq(rq) ? 0x8 : 0; |
1da177e4 LT |
530 | SCpnt->cmnd[2] = sizeof(block) > 4 ? (unsigned char) (block >> 56) & 0xff : 0; |
531 | SCpnt->cmnd[3] = sizeof(block) > 4 ? (unsigned char) (block >> 48) & 0xff : 0; | |
532 | SCpnt->cmnd[4] = sizeof(block) > 4 ? (unsigned char) (block >> 40) & 0xff : 0; | |
533 | SCpnt->cmnd[5] = sizeof(block) > 4 ? (unsigned char) (block >> 32) & 0xff : 0; | |
534 | SCpnt->cmnd[6] = (unsigned char) (block >> 24) & 0xff; | |
535 | SCpnt->cmnd[7] = (unsigned char) (block >> 16) & 0xff; | |
536 | SCpnt->cmnd[8] = (unsigned char) (block >> 8) & 0xff; | |
537 | SCpnt->cmnd[9] = (unsigned char) block & 0xff; | |
538 | SCpnt->cmnd[10] = (unsigned char) (this_count >> 24) & 0xff; | |
539 | SCpnt->cmnd[11] = (unsigned char) (this_count >> 16) & 0xff; | |
540 | SCpnt->cmnd[12] = (unsigned char) (this_count >> 8) & 0xff; | |
541 | SCpnt->cmnd[13] = (unsigned char) this_count & 0xff; | |
542 | SCpnt->cmnd[14] = SCpnt->cmnd[15] = 0; | |
543 | } else if ((this_count > 0xff) || (block > 0x1fffff) || | |
af55ff67 | 544 | scsi_device_protection(SCpnt->device) || |
1da177e4 LT |
545 | SCpnt->device->use_10_for_rw) { |
546 | if (this_count > 0xffff) | |
547 | this_count = 0xffff; | |
548 | ||
549 | SCpnt->cmnd[0] += READ_10 - READ_6; | |
007365ad | 550 | SCpnt->cmnd[1] |= blk_fua_rq(rq) ? 0x8 : 0; |
1da177e4 LT |
551 | SCpnt->cmnd[2] = (unsigned char) (block >> 24) & 0xff; |
552 | SCpnt->cmnd[3] = (unsigned char) (block >> 16) & 0xff; | |
553 | SCpnt->cmnd[4] = (unsigned char) (block >> 8) & 0xff; | |
554 | SCpnt->cmnd[5] = (unsigned char) block & 0xff; | |
555 | SCpnt->cmnd[6] = SCpnt->cmnd[9] = 0; | |
556 | SCpnt->cmnd[7] = (unsigned char) (this_count >> 8) & 0xff; | |
557 | SCpnt->cmnd[8] = (unsigned char) this_count & 0xff; | |
558 | } else { | |
007365ad TH |
559 | if (unlikely(blk_fua_rq(rq))) { |
560 | /* | |
561 | * This happens only if this drive failed | |
562 | * 10byte rw command with ILLEGAL_REQUEST | |
563 | * during operation and thus turned off | |
564 | * use_10_for_rw. | |
565 | */ | |
e73aec82 MP |
566 | scmd_printk(KERN_ERR, SCpnt, |
567 | "FUA write on READ/WRITE(6) drive\n"); | |
7f9a6bc4 | 568 | goto out; |
007365ad TH |
569 | } |
570 | ||
1da177e4 LT |
571 | SCpnt->cmnd[1] |= (unsigned char) ((block >> 16) & 0x1f); |
572 | SCpnt->cmnd[2] = (unsigned char) ((block >> 8) & 0xff); | |
573 | SCpnt->cmnd[3] = (unsigned char) block & 0xff; | |
574 | SCpnt->cmnd[4] = (unsigned char) this_count; | |
575 | SCpnt->cmnd[5] = 0; | |
576 | } | |
30b0c37b | 577 | SCpnt->sdb.length = this_count * sdp->sector_size; |
1da177e4 | 578 | |
af55ff67 MP |
579 | /* If DIF or DIX is enabled, tell HBA how to handle request */ |
580 | if (sdkp->protection_type || scsi_prot_sg_count(SCpnt)) | |
581 | sd_dif_op(SCpnt, sdkp->protection_type, scsi_prot_sg_count(SCpnt)); | |
582 | ||
1da177e4 LT |
583 | /* |
584 | * We shouldn't disconnect in the middle of a sector, so with a dumb | |
585 | * host adapter, it's safe to assume that we can at least transfer | |
586 | * this many bytes between each connect / disconnect. | |
587 | */ | |
588 | SCpnt->transfersize = sdp->sector_size; | |
589 | SCpnt->underflow = this_count << 9; | |
590 | SCpnt->allowed = SD_MAX_RETRIES; | |
1da177e4 LT |
591 | SCpnt->timeout_per_command = timeout; |
592 | ||
1da177e4 LT |
593 | /* |
594 | * This indicates that the command is ready from our end to be | |
595 | * queued. | |
596 | */ | |
7f9a6bc4 JB |
597 | ret = BLKPREP_OK; |
598 | out: | |
599 | return scsi_prep_return(q, rq, ret); | |
1da177e4 LT |
600 | } |
601 | ||
602 | /** | |
603 | * sd_open - open a scsi disk device | |
604 | * @inode: only i_rdev member may be used | |
605 | * @filp: only f_mode and f_flags may be used | |
606 | * | |
607 | * Returns 0 if successful. Returns a negated errno value in case | |
608 | * of error. | |
609 | * | |
610 | * Note: This can be called from a user context (e.g. fsck(1) ) | |
611 | * or from within the kernel (e.g. as a result of a mount(1) ). | |
612 | * In the latter case @inode and @filp carry an abridged amount | |
613 | * of information as noted above. | |
614 | **/ | |
615 | static int sd_open(struct inode *inode, struct file *filp) | |
616 | { | |
617 | struct gendisk *disk = inode->i_bdev->bd_disk; | |
618 | struct scsi_disk *sdkp; | |
619 | struct scsi_device *sdev; | |
620 | int retval; | |
621 | ||
622 | if (!(sdkp = scsi_disk_get(disk))) | |
623 | return -ENXIO; | |
624 | ||
625 | ||
fa0d34be | 626 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_open\n")); |
1da177e4 LT |
627 | |
628 | sdev = sdkp->device; | |
629 | ||
630 | /* | |
631 | * If the device is in error recovery, wait until it is done. | |
632 | * If the device is offline, then disallow any access to it. | |
633 | */ | |
634 | retval = -ENXIO; | |
635 | if (!scsi_block_when_processing_errors(sdev)) | |
636 | goto error_out; | |
637 | ||
638 | if (sdev->removable || sdkp->write_prot) | |
639 | check_disk_change(inode->i_bdev); | |
640 | ||
641 | /* | |
642 | * If the drive is empty, just let the open fail. | |
643 | */ | |
644 | retval = -ENOMEDIUM; | |
645 | if (sdev->removable && !sdkp->media_present && | |
646 | !(filp->f_flags & O_NDELAY)) | |
647 | goto error_out; | |
648 | ||
649 | /* | |
650 | * If the device has the write protect tab set, have the open fail | |
651 | * if the user expects to be able to write to the thing. | |
652 | */ | |
653 | retval = -EROFS; | |
654 | if (sdkp->write_prot && (filp->f_mode & FMODE_WRITE)) | |
655 | goto error_out; | |
656 | ||
657 | /* | |
658 | * It is possible that the disk changing stuff resulted in | |
659 | * the device being taken offline. If this is the case, | |
660 | * report this to the user, and don't pretend that the | |
661 | * open actually succeeded. | |
662 | */ | |
663 | retval = -ENXIO; | |
664 | if (!scsi_device_online(sdev)) | |
665 | goto error_out; | |
666 | ||
667 | if (!sdkp->openers++ && sdev->removable) { | |
668 | if (scsi_block_when_processing_errors(sdev)) | |
669 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT); | |
670 | } | |
671 | ||
672 | return 0; | |
673 | ||
674 | error_out: | |
675 | scsi_disk_put(sdkp); | |
676 | return retval; | |
677 | } | |
678 | ||
679 | /** | |
680 | * sd_release - invoked when the (last) close(2) is called on this | |
681 | * scsi disk. | |
682 | * @inode: only i_rdev member may be used | |
683 | * @filp: only f_mode and f_flags may be used | |
684 | * | |
685 | * Returns 0. | |
686 | * | |
687 | * Note: may block (uninterruptible) if error recovery is underway | |
688 | * on this disk. | |
689 | **/ | |
690 | static int sd_release(struct inode *inode, struct file *filp) | |
691 | { | |
692 | struct gendisk *disk = inode->i_bdev->bd_disk; | |
693 | struct scsi_disk *sdkp = scsi_disk(disk); | |
694 | struct scsi_device *sdev = sdkp->device; | |
695 | ||
56937f7b | 696 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_release\n")); |
1da177e4 LT |
697 | |
698 | if (!--sdkp->openers && sdev->removable) { | |
699 | if (scsi_block_when_processing_errors(sdev)) | |
700 | scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW); | |
701 | } | |
702 | ||
703 | /* | |
704 | * XXX and what if there are packets in flight and this close() | |
705 | * XXX is followed by a "rmmod sd_mod"? | |
706 | */ | |
707 | scsi_disk_put(sdkp); | |
708 | return 0; | |
709 | } | |
710 | ||
a885c8c4 | 711 | static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
1da177e4 LT |
712 | { |
713 | struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk); | |
714 | struct scsi_device *sdp = sdkp->device; | |
715 | struct Scsi_Host *host = sdp->host; | |
716 | int diskinfo[4]; | |
717 | ||
718 | /* default to most commonly used values */ | |
719 | diskinfo[0] = 0x40; /* 1 << 6 */ | |
720 | diskinfo[1] = 0x20; /* 1 << 5 */ | |
721 | diskinfo[2] = sdkp->capacity >> 11; | |
722 | ||
723 | /* override with calculated, extended default, or driver values */ | |
724 | if (host->hostt->bios_param) | |
725 | host->hostt->bios_param(sdp, bdev, sdkp->capacity, diskinfo); | |
726 | else | |
727 | scsicam_bios_param(bdev, sdkp->capacity, diskinfo); | |
728 | ||
a885c8c4 CH |
729 | geo->heads = diskinfo[0]; |
730 | geo->sectors = diskinfo[1]; | |
731 | geo->cylinders = diskinfo[2]; | |
1da177e4 LT |
732 | return 0; |
733 | } | |
734 | ||
735 | /** | |
736 | * sd_ioctl - process an ioctl | |
737 | * @inode: only i_rdev/i_bdev members may be used | |
738 | * @filp: only f_mode and f_flags may be used | |
739 | * @cmd: ioctl command number | |
740 | * @arg: this is third argument given to ioctl(2) system call. | |
741 | * Often contains a pointer. | |
742 | * | |
743 | * Returns 0 if successful (some ioctls return postive numbers on | |
744 | * success as well). Returns a negated errno value in case of error. | |
745 | * | |
746 | * Note: most ioctls are forward onto the block subsystem or further | |
3a4fa0a2 | 747 | * down in the scsi subsystem. |
1da177e4 LT |
748 | **/ |
749 | static int sd_ioctl(struct inode * inode, struct file * filp, | |
750 | unsigned int cmd, unsigned long arg) | |
751 | { | |
752 | struct block_device *bdev = inode->i_bdev; | |
753 | struct gendisk *disk = bdev->bd_disk; | |
754 | struct scsi_device *sdp = scsi_disk(disk)->device; | |
755 | void __user *p = (void __user *)arg; | |
756 | int error; | |
757 | ||
758 | SCSI_LOG_IOCTL(1, printk("sd_ioctl: disk=%s, cmd=0x%x\n", | |
759 | disk->disk_name, cmd)); | |
760 | ||
761 | /* | |
762 | * If we are in the middle of error recovery, don't let anyone | |
763 | * else try and use this device. Also, if error recovery fails, it | |
764 | * may try and take the device offline, in which case all further | |
765 | * access to the device is prohibited. | |
766 | */ | |
767 | error = scsi_nonblockable_ioctl(sdp, cmd, p, filp); | |
768 | if (!scsi_block_when_processing_errors(sdp) || !error) | |
769 | return error; | |
770 | ||
1da177e4 LT |
771 | /* |
772 | * Send SCSI addressing ioctls directly to mid level, send other | |
773 | * ioctls to block level and then onto mid level if they can't be | |
774 | * resolved. | |
775 | */ | |
776 | switch (cmd) { | |
777 | case SCSI_IOCTL_GET_IDLUN: | |
778 | case SCSI_IOCTL_GET_BUS_NUMBER: | |
779 | return scsi_ioctl(sdp, cmd, p); | |
780 | default: | |
45e79a3a | 781 | error = scsi_cmd_ioctl(filp, disk->queue, disk, cmd, p); |
1da177e4 LT |
782 | if (error != -ENOTTY) |
783 | return error; | |
784 | } | |
785 | return scsi_ioctl(sdp, cmd, p); | |
786 | } | |
787 | ||
788 | static void set_media_not_present(struct scsi_disk *sdkp) | |
789 | { | |
790 | sdkp->media_present = 0; | |
791 | sdkp->capacity = 0; | |
792 | sdkp->device->changed = 1; | |
793 | } | |
794 | ||
795 | /** | |
796 | * sd_media_changed - check if our medium changed | |
797 | * @disk: kernel device descriptor | |
798 | * | |
799 | * Returns 0 if not applicable or no change; 1 if change | |
800 | * | |
801 | * Note: this function is invoked from the block subsystem. | |
802 | **/ | |
803 | static int sd_media_changed(struct gendisk *disk) | |
804 | { | |
805 | struct scsi_disk *sdkp = scsi_disk(disk); | |
806 | struct scsi_device *sdp = sdkp->device; | |
001aac25 | 807 | struct scsi_sense_hdr *sshdr = NULL; |
1da177e4 LT |
808 | int retval; |
809 | ||
fa0d34be | 810 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_media_changed\n")); |
1da177e4 LT |
811 | |
812 | if (!sdp->removable) | |
813 | return 0; | |
814 | ||
815 | /* | |
816 | * If the device is offline, don't send any commands - just pretend as | |
817 | * if the command failed. If the device ever comes back online, we | |
818 | * can deal with it then. It is only because of unrecoverable errors | |
819 | * that we would ever take a device offline in the first place. | |
820 | */ | |
285e9670 KS |
821 | if (!scsi_device_online(sdp)) { |
822 | set_media_not_present(sdkp); | |
823 | retval = 1; | |
824 | goto out; | |
825 | } | |
1da177e4 LT |
826 | |
827 | /* | |
828 | * Using TEST_UNIT_READY enables differentiation between drive with | |
829 | * no cartridge loaded - NOT READY, drive with changed cartridge - | |
830 | * UNIT ATTENTION, or with same cartridge - GOOD STATUS. | |
831 | * | |
832 | * Drives that auto spin down. eg iomega jaz 1G, will be started | |
833 | * by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever | |
834 | * sd_revalidate() is called. | |
835 | */ | |
836 | retval = -ENODEV; | |
285e9670 | 837 | |
001aac25 JB |
838 | if (scsi_block_when_processing_errors(sdp)) { |
839 | sshdr = kzalloc(sizeof(*sshdr), GFP_KERNEL); | |
840 | retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, SD_MAX_RETRIES, | |
841 | sshdr); | |
842 | } | |
1da177e4 LT |
843 | |
844 | /* | |
845 | * Unable to test, unit probably not ready. This usually | |
846 | * means there is no disc in the drive. Mark as changed, | |
847 | * and we will figure it out later once the drive is | |
848 | * available again. | |
849 | */ | |
001aac25 JB |
850 | if (retval || (scsi_sense_valid(sshdr) && |
851 | /* 0x3a is medium not present */ | |
852 | sshdr->asc == 0x3a)) { | |
285e9670 KS |
853 | set_media_not_present(sdkp); |
854 | retval = 1; | |
855 | goto out; | |
856 | } | |
1da177e4 LT |
857 | |
858 | /* | |
859 | * For removable scsi disk we have to recognise the presence | |
860 | * of a disk in the drive. This is kept in the struct scsi_disk | |
861 | * struct and tested at open ! Daniel Roche (dan@lectra.fr) | |
862 | */ | |
863 | sdkp->media_present = 1; | |
864 | ||
865 | retval = sdp->changed; | |
866 | sdp->changed = 0; | |
285e9670 KS |
867 | out: |
868 | if (retval != sdkp->previous_state) | |
869 | sdev_evt_send_simple(sdp, SDEV_EVT_MEDIA_CHANGE, GFP_KERNEL); | |
870 | sdkp->previous_state = retval; | |
001aac25 | 871 | kfree(sshdr); |
1da177e4 | 872 | return retval; |
1da177e4 LT |
873 | } |
874 | ||
e73aec82 | 875 | static int sd_sync_cache(struct scsi_disk *sdkp) |
1da177e4 | 876 | { |
1da177e4 | 877 | int retries, res; |
e73aec82 | 878 | struct scsi_device *sdp = sdkp->device; |
ea73a9f2 | 879 | struct scsi_sense_hdr sshdr; |
1da177e4 LT |
880 | |
881 | if (!scsi_device_online(sdp)) | |
882 | return -ENODEV; | |
883 | ||
1da177e4 | 884 | |
1da177e4 LT |
885 | for (retries = 3; retries > 0; --retries) { |
886 | unsigned char cmd[10] = { 0 }; | |
887 | ||
888 | cmd[0] = SYNCHRONIZE_CACHE; | |
889 | /* | |
890 | * Leave the rest of the command zero to indicate | |
891 | * flush everything. | |
892 | */ | |
ea73a9f2 JB |
893 | res = scsi_execute_req(sdp, cmd, DMA_NONE, NULL, 0, &sshdr, |
894 | SD_TIMEOUT, SD_MAX_RETRIES); | |
895 | if (res == 0) | |
1da177e4 LT |
896 | break; |
897 | } | |
898 | ||
e73aec82 MP |
899 | if (res) { |
900 | sd_print_result(sdkp, res); | |
901 | if (driver_byte(res) & DRIVER_SENSE) | |
902 | sd_print_sense_hdr(sdkp, &sshdr); | |
1da177e4 LT |
903 | } |
904 | ||
3721050a TH |
905 | if (res) |
906 | return -EIO; | |
907 | return 0; | |
1da177e4 LT |
908 | } |
909 | ||
165125e1 | 910 | static void sd_prepare_flush(struct request_queue *q, struct request *rq) |
1da177e4 | 911 | { |
4aff5e23 | 912 | rq->cmd_type = REQ_TYPE_BLOCK_PC; |
c0ed79a3 JB |
913 | rq->timeout = SD_TIMEOUT; |
914 | rq->cmd[0] = SYNCHRONIZE_CACHE; | |
461d4e90 | 915 | rq->cmd_len = 10; |
1da177e4 LT |
916 | } |
917 | ||
918 | static void sd_rescan(struct device *dev) | |
919 | { | |
39b7f1e2 AS |
920 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
921 | ||
922 | if (sdkp) { | |
923 | sd_revalidate_disk(sdkp->disk); | |
924 | scsi_disk_put(sdkp); | |
925 | } | |
1da177e4 LT |
926 | } |
927 | ||
928 | ||
929 | #ifdef CONFIG_COMPAT | |
930 | /* | |
931 | * This gets directly called from VFS. When the ioctl | |
932 | * is not recognized we go back to the other translation paths. | |
933 | */ | |
934 | static long sd_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
935 | { | |
7ac6207b | 936 | struct block_device *bdev = file->f_path.dentry->d_inode->i_bdev; |
1da177e4 LT |
937 | struct gendisk *disk = bdev->bd_disk; |
938 | struct scsi_device *sdev = scsi_disk(disk)->device; | |
939 | ||
940 | /* | |
941 | * If we are in the middle of error recovery, don't let anyone | |
942 | * else try and use this device. Also, if error recovery fails, it | |
943 | * may try and take the device offline, in which case all further | |
944 | * access to the device is prohibited. | |
945 | */ | |
946 | if (!scsi_block_when_processing_errors(sdev)) | |
947 | return -ENODEV; | |
948 | ||
949 | if (sdev->host->hostt->compat_ioctl) { | |
950 | int ret; | |
951 | ||
952 | ret = sdev->host->hostt->compat_ioctl(sdev, cmd, (void __user *)arg); | |
953 | ||
954 | return ret; | |
955 | } | |
956 | ||
957 | /* | |
958 | * Let the static ioctl translation table take care of it. | |
959 | */ | |
960 | return -ENOIOCTLCMD; | |
961 | } | |
962 | #endif | |
963 | ||
964 | static struct block_device_operations sd_fops = { | |
965 | .owner = THIS_MODULE, | |
966 | .open = sd_open, | |
967 | .release = sd_release, | |
968 | .ioctl = sd_ioctl, | |
a885c8c4 | 969 | .getgeo = sd_getgeo, |
1da177e4 LT |
970 | #ifdef CONFIG_COMPAT |
971 | .compat_ioctl = sd_compat_ioctl, | |
972 | #endif | |
973 | .media_changed = sd_media_changed, | |
974 | .revalidate_disk = sd_revalidate_disk, | |
975 | }; | |
976 | ||
af55ff67 MP |
977 | static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd) |
978 | { | |
979 | u64 start_lba = scmd->request->sector; | |
980 | u64 end_lba = scmd->request->sector + (scsi_bufflen(scmd) / 512); | |
981 | u64 bad_lba; | |
982 | int info_valid; | |
983 | ||
984 | if (!blk_fs_request(scmd->request)) | |
985 | return 0; | |
986 | ||
987 | info_valid = scsi_get_sense_info_fld(scmd->sense_buffer, | |
988 | SCSI_SENSE_BUFFERSIZE, | |
989 | &bad_lba); | |
990 | if (!info_valid) | |
991 | return 0; | |
992 | ||
993 | if (scsi_bufflen(scmd) <= scmd->device->sector_size) | |
994 | return 0; | |
995 | ||
996 | if (scmd->device->sector_size < 512) { | |
997 | /* only legitimate sector_size here is 256 */ | |
998 | start_lba <<= 1; | |
999 | end_lba <<= 1; | |
1000 | } else { | |
1001 | /* be careful ... don't want any overflows */ | |
1002 | u64 factor = scmd->device->sector_size / 512; | |
1003 | do_div(start_lba, factor); | |
1004 | do_div(end_lba, factor); | |
1005 | } | |
1006 | ||
1007 | /* The bad lba was reported incorrectly, we have no idea where | |
1008 | * the error is. | |
1009 | */ | |
1010 | if (bad_lba < start_lba || bad_lba >= end_lba) | |
1011 | return 0; | |
1012 | ||
1013 | /* This computation should always be done in terms of | |
1014 | * the resolution of the device's medium. | |
1015 | */ | |
1016 | return (bad_lba - start_lba) * scmd->device->sector_size; | |
1017 | } | |
1018 | ||
1da177e4 | 1019 | /** |
7b3d9545 | 1020 | * sd_done - bottom half handler: called when the lower level |
1da177e4 LT |
1021 | * driver has completed (successfully or otherwise) a scsi command. |
1022 | * @SCpnt: mid-level's per command structure. | |
1023 | * | |
1024 | * Note: potentially run from within an ISR. Must not block. | |
1025 | **/ | |
7b3d9545 | 1026 | static int sd_done(struct scsi_cmnd *SCpnt) |
1da177e4 LT |
1027 | { |
1028 | int result = SCpnt->result; | |
af55ff67 | 1029 | unsigned int good_bytes = result ? 0 : scsi_bufflen(SCpnt); |
1da177e4 LT |
1030 | struct scsi_sense_hdr sshdr; |
1031 | int sense_valid = 0; | |
1032 | int sense_deferred = 0; | |
1da177e4 LT |
1033 | |
1034 | if (result) { | |
1035 | sense_valid = scsi_command_normalize_sense(SCpnt, &sshdr); | |
1036 | if (sense_valid) | |
1037 | sense_deferred = scsi_sense_is_deferred(&sshdr); | |
1038 | } | |
1da177e4 | 1039 | #ifdef CONFIG_SCSI_LOGGING |
fa0d34be | 1040 | SCSI_LOG_HLCOMPLETE(1, scsi_print_result(SCpnt)); |
1da177e4 | 1041 | if (sense_valid) { |
fa0d34be | 1042 | SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO, SCpnt, |
7b3d9545 | 1043 | "sd_done: sb[respc,sk,asc," |
fa0d34be MP |
1044 | "ascq]=%x,%x,%x,%x\n", |
1045 | sshdr.response_code, | |
1046 | sshdr.sense_key, sshdr.asc, | |
1047 | sshdr.ascq)); | |
1da177e4 LT |
1048 | } |
1049 | #endif | |
03aba2f7 LT |
1050 | if (driver_byte(result) != DRIVER_SENSE && |
1051 | (!sense_valid || sense_deferred)) | |
1052 | goto out; | |
1053 | ||
1054 | switch (sshdr.sense_key) { | |
1055 | case HARDWARE_ERROR: | |
1056 | case MEDIUM_ERROR: | |
af55ff67 | 1057 | good_bytes = sd_completed_bytes(SCpnt); |
03aba2f7 LT |
1058 | break; |
1059 | case RECOVERED_ERROR: | |
1060 | case NO_SENSE: | |
1061 | /* Inform the user, but make sure that it's not treated | |
1062 | * as a hard error. | |
1063 | */ | |
1064 | scsi_print_sense("sd", SCpnt); | |
1065 | SCpnt->result = 0; | |
1066 | memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); | |
af55ff67 MP |
1067 | good_bytes = scsi_bufflen(SCpnt); |
1068 | break; | |
1069 | case ABORTED_COMMAND: | |
1070 | if (sshdr.asc == 0x10) { /* DIF: Disk detected corruption */ | |
1071 | scsi_print_result(SCpnt); | |
1072 | scsi_print_sense("sd", SCpnt); | |
1073 | good_bytes = sd_completed_bytes(SCpnt); | |
1074 | } | |
03aba2f7 LT |
1075 | break; |
1076 | case ILLEGAL_REQUEST: | |
af55ff67 MP |
1077 | if (sshdr.asc == 0x10) { /* DIX: HBA detected corruption */ |
1078 | scsi_print_result(SCpnt); | |
1079 | scsi_print_sense("sd", SCpnt); | |
1080 | good_bytes = sd_completed_bytes(SCpnt); | |
1081 | } | |
1082 | if (!scsi_device_protection(SCpnt->device) && | |
1083 | SCpnt->device->use_10_for_rw && | |
03aba2f7 LT |
1084 | (SCpnt->cmnd[0] == READ_10 || |
1085 | SCpnt->cmnd[0] == WRITE_10)) | |
1086 | SCpnt->device->use_10_for_rw = 0; | |
1087 | if (SCpnt->device->use_10_for_ms && | |
1088 | (SCpnt->cmnd[0] == MODE_SENSE_10 || | |
1089 | SCpnt->cmnd[0] == MODE_SELECT_10)) | |
1090 | SCpnt->device->use_10_for_ms = 0; | |
1091 | break; | |
1092 | default: | |
1093 | break; | |
1da177e4 | 1094 | } |
03aba2f7 | 1095 | out: |
af55ff67 MP |
1096 | if (rq_data_dir(SCpnt->request) == READ && scsi_prot_sg_count(SCpnt)) |
1097 | sd_dif_complete(SCpnt, good_bytes); | |
1098 | ||
7b3d9545 | 1099 | return good_bytes; |
1da177e4 LT |
1100 | } |
1101 | ||
ea73a9f2 JB |
1102 | static int media_not_present(struct scsi_disk *sdkp, |
1103 | struct scsi_sense_hdr *sshdr) | |
1da177e4 | 1104 | { |
1da177e4 | 1105 | |
ea73a9f2 | 1106 | if (!scsi_sense_valid(sshdr)) |
1da177e4 LT |
1107 | return 0; |
1108 | /* not invoked for commands that could return deferred errors */ | |
ea73a9f2 JB |
1109 | if (sshdr->sense_key != NOT_READY && |
1110 | sshdr->sense_key != UNIT_ATTENTION) | |
1111 | return 0; | |
1112 | if (sshdr->asc != 0x3A) /* medium not present */ | |
1113 | return 0; | |
1114 | ||
1da177e4 LT |
1115 | set_media_not_present(sdkp); |
1116 | return 1; | |
1117 | } | |
1118 | ||
1119 | /* | |
1120 | * spinup disk - called only in sd_revalidate_disk() | |
1121 | */ | |
1122 | static void | |
e73aec82 | 1123 | sd_spinup_disk(struct scsi_disk *sdkp) |
ea73a9f2 | 1124 | { |
1da177e4 | 1125 | unsigned char cmd[10]; |
4451e472 | 1126 | unsigned long spintime_expire = 0; |
1da177e4 LT |
1127 | int retries, spintime; |
1128 | unsigned int the_result; | |
1129 | struct scsi_sense_hdr sshdr; | |
1130 | int sense_valid = 0; | |
1131 | ||
1132 | spintime = 0; | |
1133 | ||
1134 | /* Spin up drives, as required. Only do this at boot time */ | |
1135 | /* Spinup needs to be done for module loads too. */ | |
1136 | do { | |
1137 | retries = 0; | |
1138 | ||
1139 | do { | |
1140 | cmd[0] = TEST_UNIT_READY; | |
1141 | memset((void *) &cmd[1], 0, 9); | |
1142 | ||
ea73a9f2 JB |
1143 | the_result = scsi_execute_req(sdkp->device, cmd, |
1144 | DMA_NONE, NULL, 0, | |
1145 | &sshdr, SD_TIMEOUT, | |
1146 | SD_MAX_RETRIES); | |
1da177e4 | 1147 | |
b4d38e38 AS |
1148 | /* |
1149 | * If the drive has indicated to us that it | |
1150 | * doesn't have any media in it, don't bother | |
1151 | * with any more polling. | |
1152 | */ | |
1153 | if (media_not_present(sdkp, &sshdr)) | |
1154 | return; | |
1155 | ||
1da177e4 | 1156 | if (the_result) |
ea73a9f2 | 1157 | sense_valid = scsi_sense_valid(&sshdr); |
1da177e4 LT |
1158 | retries++; |
1159 | } while (retries < 3 && | |
1160 | (!scsi_status_is_good(the_result) || | |
1161 | ((driver_byte(the_result) & DRIVER_SENSE) && | |
1162 | sense_valid && sshdr.sense_key == UNIT_ATTENTION))); | |
1163 | ||
1da177e4 LT |
1164 | if ((driver_byte(the_result) & DRIVER_SENSE) == 0) { |
1165 | /* no sense, TUR either succeeded or failed | |
1166 | * with a status error */ | |
e73aec82 MP |
1167 | if(!spintime && !scsi_status_is_good(the_result)) { |
1168 | sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n"); | |
1169 | sd_print_result(sdkp, the_result); | |
1170 | } | |
1da177e4 LT |
1171 | break; |
1172 | } | |
1173 | ||
1174 | /* | |
1175 | * The device does not want the automatic start to be issued. | |
1176 | */ | |
1177 | if (sdkp->device->no_start_on_add) { | |
1178 | break; | |
1179 | } | |
1180 | ||
1181 | /* | |
1182 | * If manual intervention is required, or this is an | |
1183 | * absent USB storage device, a spinup is meaningless. | |
1184 | */ | |
1185 | if (sense_valid && | |
1186 | sshdr.sense_key == NOT_READY && | |
1187 | sshdr.asc == 4 && sshdr.ascq == 3) { | |
1188 | break; /* manual intervention required */ | |
1189 | ||
1190 | /* | |
1191 | * Issue command to spin up drive when not ready | |
1192 | */ | |
1193 | } else if (sense_valid && sshdr.sense_key == NOT_READY) { | |
1194 | if (!spintime) { | |
e73aec82 | 1195 | sd_printk(KERN_NOTICE, sdkp, "Spinning up disk..."); |
1da177e4 LT |
1196 | cmd[0] = START_STOP; |
1197 | cmd[1] = 1; /* Return immediately */ | |
1198 | memset((void *) &cmd[2], 0, 8); | |
1199 | cmd[4] = 1; /* Start spin cycle */ | |
d2886ea3 SR |
1200 | if (sdkp->device->start_stop_pwr_cond) |
1201 | cmd[4] |= 1 << 4; | |
ea73a9f2 JB |
1202 | scsi_execute_req(sdkp->device, cmd, DMA_NONE, |
1203 | NULL, 0, &sshdr, | |
1204 | SD_TIMEOUT, SD_MAX_RETRIES); | |
4451e472 AS |
1205 | spintime_expire = jiffies + 100 * HZ; |
1206 | spintime = 1; | |
1da177e4 | 1207 | } |
1da177e4 LT |
1208 | /* Wait 1 second for next try */ |
1209 | msleep(1000); | |
1210 | printk("."); | |
4451e472 AS |
1211 | |
1212 | /* | |
1213 | * Wait for USB flash devices with slow firmware. | |
1214 | * Yes, this sense key/ASC combination shouldn't | |
1215 | * occur here. It's characteristic of these devices. | |
1216 | */ | |
1217 | } else if (sense_valid && | |
1218 | sshdr.sense_key == UNIT_ATTENTION && | |
1219 | sshdr.asc == 0x28) { | |
1220 | if (!spintime) { | |
1221 | spintime_expire = jiffies + 5 * HZ; | |
1222 | spintime = 1; | |
1223 | } | |
1224 | /* Wait 1 second for next try */ | |
1225 | msleep(1000); | |
1da177e4 LT |
1226 | } else { |
1227 | /* we don't understand the sense code, so it's | |
1228 | * probably pointless to loop */ | |
1229 | if(!spintime) { | |
e73aec82 MP |
1230 | sd_printk(KERN_NOTICE, sdkp, "Unit Not Ready\n"); |
1231 | sd_print_sense_hdr(sdkp, &sshdr); | |
1da177e4 LT |
1232 | } |
1233 | break; | |
1234 | } | |
1235 | ||
4451e472 | 1236 | } while (spintime && time_before_eq(jiffies, spintime_expire)); |
1da177e4 LT |
1237 | |
1238 | if (spintime) { | |
1239 | if (scsi_status_is_good(the_result)) | |
1240 | printk("ready\n"); | |
1241 | else | |
1242 | printk("not responding...\n"); | |
1243 | } | |
1244 | } | |
1245 | ||
e0597d70 MP |
1246 | |
1247 | /* | |
1248 | * Determine whether disk supports Data Integrity Field. | |
1249 | */ | |
1250 | void sd_read_protection_type(struct scsi_disk *sdkp, unsigned char *buffer) | |
1251 | { | |
1252 | struct scsi_device *sdp = sdkp->device; | |
1253 | u8 type; | |
1254 | ||
1255 | if (scsi_device_protection(sdp) == 0 || (buffer[12] & 1) == 0) | |
1256 | type = 0; | |
1257 | else | |
1258 | type = ((buffer[12] >> 1) & 7) + 1; /* P_TYPE 0 = Type 1 */ | |
1259 | ||
1260 | switch (type) { | |
1261 | case SD_DIF_TYPE0_PROTECTION: | |
1262 | sdkp->protection_type = 0; | |
1263 | break; | |
1264 | ||
1265 | case SD_DIF_TYPE1_PROTECTION: | |
1266 | case SD_DIF_TYPE3_PROTECTION: | |
1267 | sdkp->protection_type = type; | |
1268 | break; | |
1269 | ||
1270 | case SD_DIF_TYPE2_PROTECTION: | |
1271 | sd_printk(KERN_ERR, sdkp, "formatted with DIF Type 2 " \ | |
1272 | "protection which is currently unsupported. " \ | |
1273 | "Disabling disk!\n"); | |
1274 | goto disable; | |
1275 | ||
1276 | default: | |
1277 | sd_printk(KERN_ERR, sdkp, "formatted with unknown " \ | |
1278 | "protection type %d. Disabling disk!\n", type); | |
1279 | goto disable; | |
1280 | } | |
1281 | ||
1282 | return; | |
1283 | ||
1284 | disable: | |
1285 | sdkp->protection_type = 0; | |
1286 | sdkp->capacity = 0; | |
1287 | } | |
1288 | ||
1da177e4 LT |
1289 | /* |
1290 | * read disk capacity | |
1291 | */ | |
1292 | static void | |
e73aec82 | 1293 | sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer) |
ea73a9f2 | 1294 | { |
1da177e4 | 1295 | unsigned char cmd[16]; |
1da177e4 LT |
1296 | int the_result, retries; |
1297 | int sector_size = 0; | |
e0597d70 MP |
1298 | /* Force READ CAPACITY(16) when PROTECT=1 */ |
1299 | int longrc = scsi_device_protection(sdkp->device) ? 1 : 0; | |
1da177e4 LT |
1300 | struct scsi_sense_hdr sshdr; |
1301 | int sense_valid = 0; | |
ea73a9f2 | 1302 | struct scsi_device *sdp = sdkp->device; |
1da177e4 LT |
1303 | |
1304 | repeat: | |
1305 | retries = 3; | |
1306 | do { | |
1307 | if (longrc) { | |
1308 | memset((void *) cmd, 0, 16); | |
1309 | cmd[0] = SERVICE_ACTION_IN; | |
1310 | cmd[1] = SAI_READ_CAPACITY_16; | |
e0597d70 MP |
1311 | cmd[13] = 13; |
1312 | memset((void *) buffer, 0, 13); | |
1da177e4 LT |
1313 | } else { |
1314 | cmd[0] = READ_CAPACITY; | |
1315 | memset((void *) &cmd[1], 0, 9); | |
1316 | memset((void *) buffer, 0, 8); | |
1317 | } | |
1318 | ||
ea73a9f2 | 1319 | the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE, |
e0597d70 | 1320 | buffer, longrc ? 13 : 8, &sshdr, |
ea73a9f2 | 1321 | SD_TIMEOUT, SD_MAX_RETRIES); |
1da177e4 | 1322 | |
ea73a9f2 | 1323 | if (media_not_present(sdkp, &sshdr)) |
1da177e4 LT |
1324 | return; |
1325 | ||
1da177e4 | 1326 | if (the_result) |
ea73a9f2 | 1327 | sense_valid = scsi_sense_valid(&sshdr); |
1da177e4 LT |
1328 | retries--; |
1329 | ||
1330 | } while (the_result && retries); | |
1331 | ||
1332 | if (the_result && !longrc) { | |
e73aec82 MP |
1333 | sd_printk(KERN_NOTICE, sdkp, "READ CAPACITY failed\n"); |
1334 | sd_print_result(sdkp, the_result); | |
1da177e4 | 1335 | if (driver_byte(the_result) & DRIVER_SENSE) |
e73aec82 | 1336 | sd_print_sense_hdr(sdkp, &sshdr); |
1da177e4 | 1337 | else |
e73aec82 | 1338 | sd_printk(KERN_NOTICE, sdkp, "Sense not available.\n"); |
1da177e4 LT |
1339 | |
1340 | /* Set dirty bit for removable devices if not ready - | |
1341 | * sometimes drives will not report this properly. */ | |
1342 | if (sdp->removable && | |
1343 | sense_valid && sshdr.sense_key == NOT_READY) | |
1344 | sdp->changed = 1; | |
1345 | ||
1346 | /* Either no media are present but the drive didn't tell us, | |
1347 | or they are present but the read capacity command fails */ | |
1348 | /* sdkp->media_present = 0; -- not always correct */ | |
69bdd88c | 1349 | sdkp->capacity = 0; /* unknown mapped to zero - as usual */ |
1da177e4 LT |
1350 | |
1351 | return; | |
1352 | } else if (the_result && longrc) { | |
1353 | /* READ CAPACITY(16) has been failed */ | |
e73aec82 MP |
1354 | sd_printk(KERN_NOTICE, sdkp, "READ CAPACITY(16) failed\n"); |
1355 | sd_print_result(sdkp, the_result); | |
1356 | sd_printk(KERN_NOTICE, sdkp, "Use 0xffffffff as device size\n"); | |
1357 | ||
1da177e4 LT |
1358 | sdkp->capacity = 1 + (sector_t) 0xffffffff; |
1359 | goto got_data; | |
1360 | } | |
1361 | ||
1362 | if (!longrc) { | |
1363 | sector_size = (buffer[4] << 24) | | |
1364 | (buffer[5] << 16) | (buffer[6] << 8) | buffer[7]; | |
1365 | if (buffer[0] == 0xff && buffer[1] == 0xff && | |
1366 | buffer[2] == 0xff && buffer[3] == 0xff) { | |
1367 | if(sizeof(sdkp->capacity) > 4) { | |
e73aec82 MP |
1368 | sd_printk(KERN_NOTICE, sdkp, "Very big device. " |
1369 | "Trying to use READ CAPACITY(16).\n"); | |
1da177e4 LT |
1370 | longrc = 1; |
1371 | goto repeat; | |
1372 | } | |
e73aec82 MP |
1373 | sd_printk(KERN_ERR, sdkp, "Too big for this kernel. Use " |
1374 | "a kernel compiled with support for large " | |
1375 | "block devices.\n"); | |
1da177e4 LT |
1376 | sdkp->capacity = 0; |
1377 | goto got_data; | |
1378 | } | |
1379 | sdkp->capacity = 1 + (((sector_t)buffer[0] << 24) | | |
1380 | (buffer[1] << 16) | | |
1381 | (buffer[2] << 8) | | |
1382 | buffer[3]); | |
1383 | } else { | |
1384 | sdkp->capacity = 1 + (((u64)buffer[0] << 56) | | |
1385 | ((u64)buffer[1] << 48) | | |
1386 | ((u64)buffer[2] << 40) | | |
1387 | ((u64)buffer[3] << 32) | | |
1388 | ((sector_t)buffer[4] << 24) | | |
1389 | ((sector_t)buffer[5] << 16) | | |
1390 | ((sector_t)buffer[6] << 8) | | |
1391 | (sector_t)buffer[7]); | |
1392 | ||
1393 | sector_size = (buffer[8] << 24) | | |
1394 | (buffer[9] << 16) | (buffer[10] << 8) | buffer[11]; | |
e0597d70 MP |
1395 | |
1396 | sd_read_protection_type(sdkp, buffer); | |
1da177e4 LT |
1397 | } |
1398 | ||
1399 | /* Some devices return the total number of sectors, not the | |
1400 | * highest sector number. Make the necessary adjustment. */ | |
61bf54b7 | 1401 | if (sdp->fix_capacity) { |
1da177e4 LT |
1402 | --sdkp->capacity; |
1403 | ||
61bf54b7 ON |
1404 | /* Some devices have version which report the correct sizes |
1405 | * and others which do not. We guess size according to a heuristic | |
1406 | * and err on the side of lowering the capacity. */ | |
1407 | } else { | |
1408 | if (sdp->guess_capacity) | |
1409 | if (sdkp->capacity & 0x01) /* odd sizes are odd */ | |
1410 | --sdkp->capacity; | |
1411 | } | |
1412 | ||
1da177e4 LT |
1413 | got_data: |
1414 | if (sector_size == 0) { | |
1415 | sector_size = 512; | |
e73aec82 MP |
1416 | sd_printk(KERN_NOTICE, sdkp, "Sector size 0 reported, " |
1417 | "assuming 512.\n"); | |
1da177e4 LT |
1418 | } |
1419 | ||
1420 | if (sector_size != 512 && | |
1421 | sector_size != 1024 && | |
1422 | sector_size != 2048 && | |
1423 | sector_size != 4096 && | |
1424 | sector_size != 256) { | |
e73aec82 MP |
1425 | sd_printk(KERN_NOTICE, sdkp, "Unsupported sector size %d.\n", |
1426 | sector_size); | |
1da177e4 LT |
1427 | /* |
1428 | * The user might want to re-format the drive with | |
1429 | * a supported sectorsize. Once this happens, it | |
1430 | * would be relatively trivial to set the thing up. | |
1431 | * For this reason, we leave the thing in the table. | |
1432 | */ | |
1433 | sdkp->capacity = 0; | |
1434 | /* | |
1435 | * set a bogus sector size so the normal read/write | |
1436 | * logic in the block layer will eventually refuse any | |
1437 | * request on this device without tripping over power | |
1438 | * of two sector size assumptions | |
1439 | */ | |
1440 | sector_size = 512; | |
1441 | } | |
1442 | { | |
1443 | /* | |
1444 | * The msdos fs needs to know the hardware sector size | |
1445 | * So I have created this table. See ll_rw_blk.c | |
1446 | * Jacques Gelinas (Jacques@solucorp.qc.ca) | |
1447 | */ | |
1448 | int hard_sector = sector_size; | |
7a691bd3 | 1449 | sector_t sz = (sdkp->capacity/2) * (hard_sector/256); |
165125e1 | 1450 | struct request_queue *queue = sdp->request_queue; |
7a691bd3 | 1451 | sector_t mb = sz; |
1da177e4 LT |
1452 | |
1453 | blk_queue_hardsect_size(queue, hard_sector); | |
1454 | /* avoid 64-bit division on 32-bit platforms */ | |
7a691bd3 | 1455 | sector_div(sz, 625); |
1da177e4 LT |
1456 | mb -= sz - 974; |
1457 | sector_div(mb, 1950); | |
1458 | ||
e73aec82 MP |
1459 | sd_printk(KERN_NOTICE, sdkp, |
1460 | "%llu %d-byte hardware sectors (%llu MB)\n", | |
1461 | (unsigned long long)sdkp->capacity, | |
1462 | hard_sector, (unsigned long long)mb); | |
1da177e4 LT |
1463 | } |
1464 | ||
1465 | /* Rescale capacity to 512-byte units */ | |
1466 | if (sector_size == 4096) | |
1467 | sdkp->capacity <<= 3; | |
1468 | else if (sector_size == 2048) | |
1469 | sdkp->capacity <<= 2; | |
1470 | else if (sector_size == 1024) | |
1471 | sdkp->capacity <<= 1; | |
1472 | else if (sector_size == 256) | |
1473 | sdkp->capacity >>= 1; | |
1474 | ||
1475 | sdkp->device->sector_size = sector_size; | |
1476 | } | |
1477 | ||
1478 | /* called with buffer of length 512 */ | |
1479 | static inline int | |
ea73a9f2 JB |
1480 | sd_do_mode_sense(struct scsi_device *sdp, int dbd, int modepage, |
1481 | unsigned char *buffer, int len, struct scsi_mode_data *data, | |
1482 | struct scsi_sense_hdr *sshdr) | |
1da177e4 | 1483 | { |
ea73a9f2 | 1484 | return scsi_mode_sense(sdp, dbd, modepage, buffer, len, |
1cf72699 | 1485 | SD_TIMEOUT, SD_MAX_RETRIES, data, |
ea73a9f2 | 1486 | sshdr); |
1da177e4 LT |
1487 | } |
1488 | ||
1489 | /* | |
1490 | * read write protect setting, if possible - called only in sd_revalidate_disk() | |
48970800 | 1491 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
1492 | */ |
1493 | static void | |
e73aec82 | 1494 | sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer) |
ea73a9f2 | 1495 | { |
1da177e4 | 1496 | int res; |
ea73a9f2 | 1497 | struct scsi_device *sdp = sdkp->device; |
1da177e4 LT |
1498 | struct scsi_mode_data data; |
1499 | ||
1500 | set_disk_ro(sdkp->disk, 0); | |
ea73a9f2 | 1501 | if (sdp->skip_ms_page_3f) { |
e73aec82 | 1502 | sd_printk(KERN_NOTICE, sdkp, "Assuming Write Enabled\n"); |
1da177e4 LT |
1503 | return; |
1504 | } | |
1505 | ||
ea73a9f2 JB |
1506 | if (sdp->use_192_bytes_for_3f) { |
1507 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 192, &data, NULL); | |
1da177e4 LT |
1508 | } else { |
1509 | /* | |
1510 | * First attempt: ask for all pages (0x3F), but only 4 bytes. | |
1511 | * We have to start carefully: some devices hang if we ask | |
1512 | * for more than is available. | |
1513 | */ | |
ea73a9f2 | 1514 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 4, &data, NULL); |
1da177e4 LT |
1515 | |
1516 | /* | |
1517 | * Second attempt: ask for page 0 When only page 0 is | |
1518 | * implemented, a request for page 3F may return Sense Key | |
1519 | * 5: Illegal Request, Sense Code 24: Invalid field in | |
1520 | * CDB. | |
1521 | */ | |
1522 | if (!scsi_status_is_good(res)) | |
ea73a9f2 | 1523 | res = sd_do_mode_sense(sdp, 0, 0, buffer, 4, &data, NULL); |
1da177e4 LT |
1524 | |
1525 | /* | |
1526 | * Third attempt: ask 255 bytes, as we did earlier. | |
1527 | */ | |
1528 | if (!scsi_status_is_good(res)) | |
ea73a9f2 JB |
1529 | res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 255, |
1530 | &data, NULL); | |
1da177e4 LT |
1531 | } |
1532 | ||
1533 | if (!scsi_status_is_good(res)) { | |
e73aec82 MP |
1534 | sd_printk(KERN_WARNING, sdkp, |
1535 | "Test WP failed, assume Write Enabled\n"); | |
1da177e4 LT |
1536 | } else { |
1537 | sdkp->write_prot = ((data.device_specific & 0x80) != 0); | |
1538 | set_disk_ro(sdkp->disk, sdkp->write_prot); | |
e73aec82 MP |
1539 | sd_printk(KERN_NOTICE, sdkp, "Write Protect is %s\n", |
1540 | sdkp->write_prot ? "on" : "off"); | |
1541 | sd_printk(KERN_DEBUG, sdkp, | |
1542 | "Mode Sense: %02x %02x %02x %02x\n", | |
1543 | buffer[0], buffer[1], buffer[2], buffer[3]); | |
1da177e4 LT |
1544 | } |
1545 | } | |
1546 | ||
1547 | /* | |
1548 | * sd_read_cache_type - called only from sd_revalidate_disk() | |
48970800 | 1549 | * called with buffer of length SD_BUF_SIZE |
1da177e4 LT |
1550 | */ |
1551 | static void | |
e73aec82 | 1552 | sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer) |
631e8a13 | 1553 | { |
1da177e4 | 1554 | int len = 0, res; |
ea73a9f2 | 1555 | struct scsi_device *sdp = sdkp->device; |
1da177e4 | 1556 | |
631e8a13 AV |
1557 | int dbd; |
1558 | int modepage; | |
1da177e4 LT |
1559 | struct scsi_mode_data data; |
1560 | struct scsi_sense_hdr sshdr; | |
1561 | ||
ea73a9f2 | 1562 | if (sdp->skip_ms_page_8) |
1da177e4 LT |
1563 | goto defaults; |
1564 | ||
ea73a9f2 | 1565 | if (sdp->type == TYPE_RBC) { |
631e8a13 AV |
1566 | modepage = 6; |
1567 | dbd = 8; | |
1568 | } else { | |
1569 | modepage = 8; | |
1570 | dbd = 0; | |
1571 | } | |
1572 | ||
1da177e4 | 1573 | /* cautiously ask */ |
ea73a9f2 | 1574 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, 4, &data, &sshdr); |
1da177e4 LT |
1575 | |
1576 | if (!scsi_status_is_good(res)) | |
1577 | goto bad_sense; | |
1578 | ||
6d73c851 AV |
1579 | if (!data.header_length) { |
1580 | modepage = 6; | |
e73aec82 | 1581 | sd_printk(KERN_ERR, sdkp, "Missing header in MODE_SENSE response\n"); |
6d73c851 AV |
1582 | } |
1583 | ||
1da177e4 LT |
1584 | /* that went OK, now ask for the proper length */ |
1585 | len = data.length; | |
1586 | ||
1587 | /* | |
1588 | * We're only interested in the first three bytes, actually. | |
1589 | * But the data cache page is defined for the first 20. | |
1590 | */ | |
1591 | if (len < 3) | |
1592 | goto bad_sense; | |
1593 | if (len > 20) | |
1594 | len = 20; | |
1595 | ||
1596 | /* Take headers and block descriptors into account */ | |
1597 | len += data.header_length + data.block_descriptor_length; | |
48970800 AV |
1598 | if (len > SD_BUF_SIZE) |
1599 | goto bad_sense; | |
1da177e4 LT |
1600 | |
1601 | /* Get the data */ | |
ea73a9f2 | 1602 | res = sd_do_mode_sense(sdp, dbd, modepage, buffer, len, &data, &sshdr); |
1da177e4 LT |
1603 | |
1604 | if (scsi_status_is_good(res)) { | |
631e8a13 | 1605 | int offset = data.header_length + data.block_descriptor_length; |
1da177e4 | 1606 | |
48970800 | 1607 | if (offset >= SD_BUF_SIZE - 2) { |
e73aec82 | 1608 | sd_printk(KERN_ERR, sdkp, "Malformed MODE SENSE response\n"); |
48970800 AV |
1609 | goto defaults; |
1610 | } | |
1611 | ||
631e8a13 | 1612 | if ((buffer[offset] & 0x3f) != modepage) { |
e73aec82 | 1613 | sd_printk(KERN_ERR, sdkp, "Got wrong page\n"); |
631e8a13 AV |
1614 | goto defaults; |
1615 | } | |
1616 | ||
1617 | if (modepage == 8) { | |
1618 | sdkp->WCE = ((buffer[offset + 2] & 0x04) != 0); | |
1619 | sdkp->RCD = ((buffer[offset + 2] & 0x01) != 0); | |
1620 | } else { | |
1621 | sdkp->WCE = ((buffer[offset + 2] & 0x01) == 0); | |
1622 | sdkp->RCD = 0; | |
1623 | } | |
1da177e4 | 1624 | |
007365ad TH |
1625 | sdkp->DPOFUA = (data.device_specific & 0x10) != 0; |
1626 | if (sdkp->DPOFUA && !sdkp->device->use_10_for_rw) { | |
e73aec82 MP |
1627 | sd_printk(KERN_NOTICE, sdkp, |
1628 | "Uses READ/WRITE(6), disabling FUA\n"); | |
007365ad TH |
1629 | sdkp->DPOFUA = 0; |
1630 | } | |
1631 | ||
e73aec82 MP |
1632 | sd_printk(KERN_NOTICE, sdkp, |
1633 | "Write cache: %s, read cache: %s, %s\n", | |
fd44bab5 LT |
1634 | sdkp->WCE ? "enabled" : "disabled", |
1635 | sdkp->RCD ? "disabled" : "enabled", | |
1636 | sdkp->DPOFUA ? "supports DPO and FUA" | |
1637 | : "doesn't support DPO or FUA"); | |
1da177e4 LT |
1638 | |
1639 | return; | |
1640 | } | |
1641 | ||
1642 | bad_sense: | |
ea73a9f2 | 1643 | if (scsi_sense_valid(&sshdr) && |
1da177e4 LT |
1644 | sshdr.sense_key == ILLEGAL_REQUEST && |
1645 | sshdr.asc == 0x24 && sshdr.ascq == 0x0) | |
e73aec82 MP |
1646 | /* Invalid field in CDB */ |
1647 | sd_printk(KERN_NOTICE, sdkp, "Cache data unavailable\n"); | |
1da177e4 | 1648 | else |
e73aec82 | 1649 | sd_printk(KERN_ERR, sdkp, "Asking for cache data failed\n"); |
1da177e4 LT |
1650 | |
1651 | defaults: | |
e73aec82 | 1652 | sd_printk(KERN_ERR, sdkp, "Assuming drive cache: write through\n"); |
1da177e4 LT |
1653 | sdkp->WCE = 0; |
1654 | sdkp->RCD = 0; | |
48970800 | 1655 | sdkp->DPOFUA = 0; |
1da177e4 LT |
1656 | } |
1657 | ||
e0597d70 MP |
1658 | /* |
1659 | * The ATO bit indicates whether the DIF application tag is available | |
1660 | * for use by the operating system. | |
1661 | */ | |
1662 | void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer) | |
1663 | { | |
1664 | int res, offset; | |
1665 | struct scsi_device *sdp = sdkp->device; | |
1666 | struct scsi_mode_data data; | |
1667 | struct scsi_sense_hdr sshdr; | |
1668 | ||
1669 | if (sdp->type != TYPE_DISK) | |
1670 | return; | |
1671 | ||
1672 | if (sdkp->protection_type == 0) | |
1673 | return; | |
1674 | ||
1675 | res = scsi_mode_sense(sdp, 1, 0x0a, buffer, 36, SD_TIMEOUT, | |
1676 | SD_MAX_RETRIES, &data, &sshdr); | |
1677 | ||
1678 | if (!scsi_status_is_good(res) || !data.header_length || | |
1679 | data.length < 6) { | |
1680 | sd_printk(KERN_WARNING, sdkp, | |
1681 | "getting Control mode page failed, assume no ATO\n"); | |
1682 | ||
1683 | if (scsi_sense_valid(&sshdr)) | |
1684 | sd_print_sense_hdr(sdkp, &sshdr); | |
1685 | ||
1686 | return; | |
1687 | } | |
1688 | ||
1689 | offset = data.header_length + data.block_descriptor_length; | |
1690 | ||
1691 | if ((buffer[offset] & 0x3f) != 0x0a) { | |
1692 | sd_printk(KERN_ERR, sdkp, "ATO Got wrong page\n"); | |
1693 | return; | |
1694 | } | |
1695 | ||
1696 | if ((buffer[offset + 5] & 0x80) == 0) | |
1697 | return; | |
1698 | ||
1699 | sdkp->ATO = 1; | |
1700 | ||
1701 | return; | |
1702 | } | |
1703 | ||
1da177e4 LT |
1704 | /** |
1705 | * sd_revalidate_disk - called the first time a new disk is seen, | |
1706 | * performs disk spin up, read_capacity, etc. | |
1707 | * @disk: struct gendisk we care about | |
1708 | **/ | |
1709 | static int sd_revalidate_disk(struct gendisk *disk) | |
1710 | { | |
1711 | struct scsi_disk *sdkp = scsi_disk(disk); | |
1712 | struct scsi_device *sdp = sdkp->device; | |
1da177e4 | 1713 | unsigned char *buffer; |
461d4e90 | 1714 | unsigned ordered; |
1da177e4 | 1715 | |
fa0d34be MP |
1716 | SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, |
1717 | "sd_revalidate_disk\n")); | |
1da177e4 LT |
1718 | |
1719 | /* | |
1720 | * If the device is offline, don't try and read capacity or any | |
1721 | * of the other niceties. | |
1722 | */ | |
1723 | if (!scsi_device_online(sdp)) | |
1724 | goto out; | |
1725 | ||
a6123f14 | 1726 | buffer = kmalloc(SD_BUF_SIZE, GFP_KERNEL); |
1da177e4 | 1727 | if (!buffer) { |
e73aec82 MP |
1728 | sd_printk(KERN_WARNING, sdkp, "sd_revalidate_disk: Memory " |
1729 | "allocation failure.\n"); | |
ea73a9f2 | 1730 | goto out; |
1da177e4 LT |
1731 | } |
1732 | ||
1733 | /* defaults, until the device tells us otherwise */ | |
1734 | sdp->sector_size = 512; | |
1735 | sdkp->capacity = 0; | |
1736 | sdkp->media_present = 1; | |
1737 | sdkp->write_prot = 0; | |
1738 | sdkp->WCE = 0; | |
1739 | sdkp->RCD = 0; | |
e0597d70 | 1740 | sdkp->ATO = 0; |
1da177e4 | 1741 | |
e73aec82 | 1742 | sd_spinup_disk(sdkp); |
1da177e4 LT |
1743 | |
1744 | /* | |
1745 | * Without media there is no reason to ask; moreover, some devices | |
1746 | * react badly if we do. | |
1747 | */ | |
1748 | if (sdkp->media_present) { | |
e73aec82 MP |
1749 | sd_read_capacity(sdkp, buffer); |
1750 | sd_read_write_protect_flag(sdkp, buffer); | |
1751 | sd_read_cache_type(sdkp, buffer); | |
e0597d70 | 1752 | sd_read_app_tag_own(sdkp, buffer); |
1da177e4 | 1753 | } |
461d4e90 TH |
1754 | |
1755 | /* | |
1756 | * We now have all cache related info, determine how we deal | |
1757 | * with ordered requests. Note that as the current SCSI | |
1758 | * dispatch function can alter request order, we cannot use | |
1759 | * QUEUE_ORDERED_TAG_* even when ordered tag is supported. | |
1760 | */ | |
1761 | if (sdkp->WCE) | |
007365ad TH |
1762 | ordered = sdkp->DPOFUA |
1763 | ? QUEUE_ORDERED_DRAIN_FUA : QUEUE_ORDERED_DRAIN_FLUSH; | |
461d4e90 TH |
1764 | else |
1765 | ordered = QUEUE_ORDERED_DRAIN; | |
1766 | ||
1767 | blk_queue_ordered(sdkp->disk->queue, ordered, sd_prepare_flush); | |
1768 | ||
1da177e4 LT |
1769 | set_capacity(disk, sdkp->capacity); |
1770 | kfree(buffer); | |
1771 | ||
1da177e4 LT |
1772 | out: |
1773 | return 0; | |
1774 | } | |
1775 | ||
1776 | /** | |
1777 | * sd_probe - called during driver initialization and whenever a | |
1778 | * new scsi device is attached to the system. It is called once | |
1779 | * for each scsi device (not just disks) present. | |
1780 | * @dev: pointer to device object | |
1781 | * | |
1782 | * Returns 0 if successful (or not interested in this scsi device | |
1783 | * (e.g. scanner)); 1 when there is an error. | |
1784 | * | |
1785 | * Note: this function is invoked from the scsi mid-level. | |
1786 | * This function sets up the mapping between a given | |
1787 | * <host,channel,id,lun> (found in sdp) and new device name | |
1788 | * (e.g. /dev/sda). More precisely it is the block device major | |
1789 | * and minor number that is chosen here. | |
1790 | * | |
1791 | * Assume sd_attach is not re-entrant (for time being) | |
1792 | * Also think about sd_attach() and sd_remove() running coincidentally. | |
1793 | **/ | |
1794 | static int sd_probe(struct device *dev) | |
1795 | { | |
1796 | struct scsi_device *sdp = to_scsi_device(dev); | |
1797 | struct scsi_disk *sdkp; | |
1798 | struct gendisk *gd; | |
1799 | u32 index; | |
1800 | int error; | |
1801 | ||
1802 | error = -ENODEV; | |
631e8a13 | 1803 | if (sdp->type != TYPE_DISK && sdp->type != TYPE_MOD && sdp->type != TYPE_RBC) |
1da177e4 LT |
1804 | goto out; |
1805 | ||
9ccfc756 JB |
1806 | SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO, sdp, |
1807 | "sd_attach\n")); | |
1da177e4 LT |
1808 | |
1809 | error = -ENOMEM; | |
24669f75 | 1810 | sdkp = kzalloc(sizeof(*sdkp), GFP_KERNEL); |
1da177e4 LT |
1811 | if (!sdkp) |
1812 | goto out; | |
1813 | ||
f615b48c | 1814 | gd = alloc_disk_ext(SD_MINORS, SD_EXT_MINORS); |
1da177e4 LT |
1815 | if (!gd) |
1816 | goto out_free; | |
1817 | ||
f27bac27 TH |
1818 | do { |
1819 | if (!ida_pre_get(&sd_index_ida, GFP_KERNEL)) | |
1820 | goto out_put; | |
1da177e4 | 1821 | |
f27bac27 TH |
1822 | error = ida_get_new(&sd_index_ida, &index); |
1823 | } while (error == -EAGAIN); | |
1da177e4 | 1824 | |
1da177e4 LT |
1825 | if (error) |
1826 | goto out_put; | |
1827 | ||
f27bac27 TH |
1828 | error = -EBUSY; |
1829 | if (index >= SD_MAX_DISKS) | |
1830 | goto out_free_index; | |
1831 | ||
1da177e4 LT |
1832 | sdkp->device = sdp; |
1833 | sdkp->driver = &sd_template; | |
1834 | sdkp->disk = gd; | |
1835 | sdkp->index = index; | |
1836 | sdkp->openers = 0; | |
c02e6002 | 1837 | sdkp->previous_state = 1; |
1da177e4 LT |
1838 | |
1839 | if (!sdp->timeout) { | |
631e8a13 | 1840 | if (sdp->type != TYPE_MOD) |
1da177e4 LT |
1841 | sdp->timeout = SD_TIMEOUT; |
1842 | else | |
1843 | sdp->timeout = SD_MOD_TIMEOUT; | |
1844 | } | |
1845 | ||
ee959b00 TJ |
1846 | device_initialize(&sdkp->dev); |
1847 | sdkp->dev.parent = &sdp->sdev_gendev; | |
1848 | sdkp->dev.class = &sd_disk_class; | |
1849 | strncpy(sdkp->dev.bus_id, sdp->sdev_gendev.bus_id, BUS_ID_SIZE); | |
017f2e37 | 1850 | |
ee959b00 | 1851 | if (device_add(&sdkp->dev)) |
f27bac27 | 1852 | goto out_free_index; |
017f2e37 NST |
1853 | |
1854 | get_device(&sdp->sdev_gendev); | |
1855 | ||
1da177e4 LT |
1856 | gd->major = sd_major((index & 0xf0) >> 4); |
1857 | gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00); | |
f615b48c TH |
1858 | gd->minors = SD_MINORS; |
1859 | gd->ext_minors = SD_EXT_MINORS; | |
1da177e4 LT |
1860 | gd->fops = &sd_fops; |
1861 | ||
1862 | if (index < 26) { | |
1863 | sprintf(gd->disk_name, "sd%c", 'a' + index % 26); | |
1864 | } else if (index < (26 + 1) * 26) { | |
1865 | sprintf(gd->disk_name, "sd%c%c", | |
1866 | 'a' + index / 26 - 1,'a' + index % 26); | |
1867 | } else { | |
1868 | const unsigned int m1 = (index / 26 - 1) / 26 - 1; | |
1869 | const unsigned int m2 = (index / 26 - 1) % 26; | |
1870 | const unsigned int m3 = index % 26; | |
1871 | sprintf(gd->disk_name, "sd%c%c%c", | |
1872 | 'a' + m1, 'a' + m2, 'a' + m3); | |
1873 | } | |
1874 | ||
1da177e4 | 1875 | gd->private_data = &sdkp->driver; |
461d4e90 | 1876 | gd->queue = sdkp->device->request_queue; |
1da177e4 LT |
1877 | |
1878 | sd_revalidate_disk(gd); | |
1879 | ||
7f9a6bc4 | 1880 | blk_queue_prep_rq(sdp->request_queue, sd_prep_fn); |
03a5743a | 1881 | |
1da177e4 LT |
1882 | gd->driverfs_dev = &sdp->sdev_gendev; |
1883 | gd->flags = GENHD_FL_DRIVERFS; | |
1884 | if (sdp->removable) | |
1885 | gd->flags |= GENHD_FL_REMOVABLE; | |
1da177e4 LT |
1886 | |
1887 | dev_set_drvdata(dev, sdkp); | |
1888 | add_disk(gd); | |
af55ff67 | 1889 | sd_dif_config_host(sdkp); |
1da177e4 | 1890 | |
e73aec82 MP |
1891 | sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n", |
1892 | sdp->removable ? "removable " : ""); | |
1da177e4 LT |
1893 | |
1894 | return 0; | |
1895 | ||
f27bac27 TH |
1896 | out_free_index: |
1897 | ida_remove(&sd_index_ida, index); | |
6bdaa1f1 | 1898 | out_put: |
1da177e4 | 1899 | put_disk(gd); |
6bdaa1f1 | 1900 | out_free: |
1da177e4 | 1901 | kfree(sdkp); |
6bdaa1f1 | 1902 | out: |
1da177e4 LT |
1903 | return error; |
1904 | } | |
1905 | ||
1906 | /** | |
1907 | * sd_remove - called whenever a scsi disk (previously recognized by | |
1908 | * sd_probe) is detached from the system. It is called (potentially | |
1909 | * multiple times) during sd module unload. | |
1910 | * @sdp: pointer to mid level scsi device object | |
1911 | * | |
1912 | * Note: this function is invoked from the scsi mid-level. | |
1913 | * This function potentially frees up a device name (e.g. /dev/sdc) | |
1914 | * that could be re-used by a subsequent sd_probe(). | |
1915 | * This function is not called when the built-in sd driver is "exit-ed". | |
1916 | **/ | |
1917 | static int sd_remove(struct device *dev) | |
1918 | { | |
1919 | struct scsi_disk *sdkp = dev_get_drvdata(dev); | |
1920 | ||
ee959b00 | 1921 | device_del(&sdkp->dev); |
1da177e4 LT |
1922 | del_gendisk(sdkp->disk); |
1923 | sd_shutdown(dev); | |
39b7f1e2 | 1924 | |
0b950672 | 1925 | mutex_lock(&sd_ref_mutex); |
39b7f1e2 | 1926 | dev_set_drvdata(dev, NULL); |
ee959b00 | 1927 | put_device(&sdkp->dev); |
0b950672 | 1928 | mutex_unlock(&sd_ref_mutex); |
1da177e4 LT |
1929 | |
1930 | return 0; | |
1931 | } | |
1932 | ||
1933 | /** | |
1934 | * scsi_disk_release - Called to free the scsi_disk structure | |
ee959b00 | 1935 | * @dev: pointer to embedded class device |
1da177e4 | 1936 | * |
0b950672 | 1937 | * sd_ref_mutex must be held entering this routine. Because it is |
1da177e4 LT |
1938 | * called on last put, you should always use the scsi_disk_get() |
1939 | * scsi_disk_put() helpers which manipulate the semaphore directly | |
ee959b00 | 1940 | * and never do a direct put_device. |
1da177e4 | 1941 | **/ |
ee959b00 | 1942 | static void scsi_disk_release(struct device *dev) |
1da177e4 | 1943 | { |
ee959b00 | 1944 | struct scsi_disk *sdkp = to_scsi_disk(dev); |
1da177e4 LT |
1945 | struct gendisk *disk = sdkp->disk; |
1946 | ||
f27bac27 | 1947 | ida_remove(&sd_index_ida, sdkp->index); |
1da177e4 LT |
1948 | |
1949 | disk->private_data = NULL; | |
1da177e4 | 1950 | put_disk(disk); |
39b7f1e2 | 1951 | put_device(&sdkp->device->sdev_gendev); |
1da177e4 LT |
1952 | |
1953 | kfree(sdkp); | |
1954 | } | |
1955 | ||
cc5d2c8c | 1956 | static int sd_start_stop_device(struct scsi_disk *sdkp, int start) |
c3c94c5a TH |
1957 | { |
1958 | unsigned char cmd[6] = { START_STOP }; /* START_VALID */ | |
1959 | struct scsi_sense_hdr sshdr; | |
cc5d2c8c | 1960 | struct scsi_device *sdp = sdkp->device; |
c3c94c5a TH |
1961 | int res; |
1962 | ||
1963 | if (start) | |
1964 | cmd[4] |= 1; /* START */ | |
1965 | ||
d2886ea3 SR |
1966 | if (sdp->start_stop_pwr_cond) |
1967 | cmd[4] |= start ? 1 << 4 : 3 << 4; /* Active or Standby */ | |
1968 | ||
c3c94c5a TH |
1969 | if (!scsi_device_online(sdp)) |
1970 | return -ENODEV; | |
1971 | ||
1972 | res = scsi_execute_req(sdp, cmd, DMA_NONE, NULL, 0, &sshdr, | |
1973 | SD_TIMEOUT, SD_MAX_RETRIES); | |
1974 | if (res) { | |
cc5d2c8c JB |
1975 | sd_printk(KERN_WARNING, sdkp, "START_STOP FAILED\n"); |
1976 | sd_print_result(sdkp, res); | |
c3c94c5a | 1977 | if (driver_byte(res) & DRIVER_SENSE) |
cc5d2c8c | 1978 | sd_print_sense_hdr(sdkp, &sshdr); |
c3c94c5a TH |
1979 | } |
1980 | ||
1981 | return res; | |
1982 | } | |
1983 | ||
1da177e4 LT |
1984 | /* |
1985 | * Send a SYNCHRONIZE CACHE instruction down to the device through | |
1986 | * the normal SCSI command structure. Wait for the command to | |
1987 | * complete. | |
1988 | */ | |
1989 | static void sd_shutdown(struct device *dev) | |
1990 | { | |
39b7f1e2 | 1991 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
1da177e4 LT |
1992 | |
1993 | if (!sdkp) | |
1994 | return; /* this can happen */ | |
1995 | ||
39b7f1e2 | 1996 | if (sdkp->WCE) { |
e73aec82 MP |
1997 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
1998 | sd_sync_cache(sdkp); | |
39b7f1e2 | 1999 | } |
c3c94c5a | 2000 | |
cc5d2c8c JB |
2001 | if (system_state != SYSTEM_RESTART && sdkp->device->manage_start_stop) { |
2002 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); | |
2003 | sd_start_stop_device(sdkp, 0); | |
c3c94c5a TH |
2004 | } |
2005 | ||
39b7f1e2 AS |
2006 | scsi_disk_put(sdkp); |
2007 | } | |
1da177e4 | 2008 | |
c3c94c5a TH |
2009 | static int sd_suspend(struct device *dev, pm_message_t mesg) |
2010 | { | |
c3c94c5a | 2011 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
09ff92fe | 2012 | int ret = 0; |
c3c94c5a TH |
2013 | |
2014 | if (!sdkp) | |
2015 | return 0; /* this can happen */ | |
2016 | ||
2017 | if (sdkp->WCE) { | |
cc5d2c8c | 2018 | sd_printk(KERN_NOTICE, sdkp, "Synchronizing SCSI cache\n"); |
c3c94c5a TH |
2019 | ret = sd_sync_cache(sdkp); |
2020 | if (ret) | |
09ff92fe | 2021 | goto done; |
c3c94c5a TH |
2022 | } |
2023 | ||
3a2d5b70 | 2024 | if ((mesg.event & PM_EVENT_SLEEP) && sdkp->device->manage_start_stop) { |
cc5d2c8c JB |
2025 | sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); |
2026 | ret = sd_start_stop_device(sdkp, 0); | |
c3c94c5a TH |
2027 | } |
2028 | ||
09ff92fe AS |
2029 | done: |
2030 | scsi_disk_put(sdkp); | |
2031 | return ret; | |
c3c94c5a TH |
2032 | } |
2033 | ||
2034 | static int sd_resume(struct device *dev) | |
2035 | { | |
c3c94c5a | 2036 | struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev); |
09ff92fe | 2037 | int ret = 0; |
c3c94c5a | 2038 | |
cc5d2c8c | 2039 | if (!sdkp->device->manage_start_stop) |
09ff92fe | 2040 | goto done; |
c3c94c5a | 2041 | |
cc5d2c8c | 2042 | sd_printk(KERN_NOTICE, sdkp, "Starting disk\n"); |
09ff92fe | 2043 | ret = sd_start_stop_device(sdkp, 1); |
c3c94c5a | 2044 | |
09ff92fe AS |
2045 | done: |
2046 | scsi_disk_put(sdkp); | |
2047 | return ret; | |
c3c94c5a TH |
2048 | } |
2049 | ||
1da177e4 LT |
2050 | /** |
2051 | * init_sd - entry point for this driver (both when built in or when | |
2052 | * a module). | |
2053 | * | |
2054 | * Note: this function registers this driver with the scsi mid-level. | |
2055 | **/ | |
2056 | static int __init init_sd(void) | |
2057 | { | |
5e4009ba | 2058 | int majors = 0, i, err; |
1da177e4 LT |
2059 | |
2060 | SCSI_LOG_HLQUEUE(3, printk("init_sd: sd driver entry point\n")); | |
2061 | ||
2062 | for (i = 0; i < SD_MAJORS; i++) | |
2063 | if (register_blkdev(sd_major(i), "sd") == 0) | |
2064 | majors++; | |
2065 | ||
2066 | if (!majors) | |
2067 | return -ENODEV; | |
2068 | ||
5e4009ba JG |
2069 | err = class_register(&sd_disk_class); |
2070 | if (err) | |
2071 | goto err_out; | |
6bdaa1f1 | 2072 | |
5e4009ba JG |
2073 | err = scsi_register_driver(&sd_template.gendrv); |
2074 | if (err) | |
2075 | goto err_out_class; | |
2076 | ||
2077 | return 0; | |
2078 | ||
2079 | err_out_class: | |
2080 | class_unregister(&sd_disk_class); | |
2081 | err_out: | |
2082 | for (i = 0; i < SD_MAJORS; i++) | |
2083 | unregister_blkdev(sd_major(i), "sd"); | |
2084 | return err; | |
1da177e4 LT |
2085 | } |
2086 | ||
2087 | /** | |
2088 | * exit_sd - exit point for this driver (when it is a module). | |
2089 | * | |
2090 | * Note: this function unregisters this driver from the scsi mid-level. | |
2091 | **/ | |
2092 | static void __exit exit_sd(void) | |
2093 | { | |
2094 | int i; | |
2095 | ||
2096 | SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n")); | |
2097 | ||
2098 | scsi_unregister_driver(&sd_template.gendrv); | |
5e4009ba JG |
2099 | class_unregister(&sd_disk_class); |
2100 | ||
1da177e4 LT |
2101 | for (i = 0; i < SD_MAJORS; i++) |
2102 | unregister_blkdev(sd_major(i), "sd"); | |
2103 | } | |
2104 | ||
1da177e4 LT |
2105 | module_init(init_sd); |
2106 | module_exit(exit_sd); | |
e73aec82 MP |
2107 | |
2108 | static void sd_print_sense_hdr(struct scsi_disk *sdkp, | |
2109 | struct scsi_sense_hdr *sshdr) | |
2110 | { | |
2111 | sd_printk(KERN_INFO, sdkp, ""); | |
2112 | scsi_show_sense_hdr(sshdr); | |
2113 | sd_printk(KERN_INFO, sdkp, ""); | |
2114 | scsi_show_extd_sense(sshdr->asc, sshdr->ascq); | |
2115 | } | |
2116 | ||
2117 | static void sd_print_result(struct scsi_disk *sdkp, int result) | |
2118 | { | |
2119 | sd_printk(KERN_INFO, sdkp, ""); | |
2120 | scsi_show_result(result); | |
2121 | } | |
2122 |