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Commit | Line | Data |
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5fef0e5c BZ |
1 | #include <linux/module.h> |
2 | #include <linux/types.h> | |
3 | #include <linux/string.h> | |
4 | #include <linux/kernel.h> | |
5 | #include <linux/errno.h> | |
6 | #include <linux/genhd.h> | |
7 | #include <linux/mutex.h> | |
8 | #include <linux/ide.h> | |
9 | #include <linux/hdreg.h> | |
b0aedb04 | 10 | #include <linux/dmi.h> |
5a0e3ad6 | 11 | #include <linux/slab.h> |
5fef0e5c BZ |
12 | |
13 | #if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT) | |
14 | #define IDE_DISK_MINORS (1 << PARTN_BITS) | |
15 | #else | |
16 | #define IDE_DISK_MINORS 0 | |
17 | #endif | |
18 | ||
19 | #include "ide-disk.h" | |
806f80a6 | 20 | #include "ide-floppy.h" |
5fef0e5c BZ |
21 | |
22 | #define IDE_GD_VERSION "1.18" | |
23 | ||
806f80a6 BZ |
24 | /* module parameters */ |
25 | static unsigned long debug_mask; | |
26 | module_param(debug_mask, ulong, 0644); | |
27 | ||
5fef0e5c BZ |
28 | static DEFINE_MUTEX(ide_disk_ref_mutex); |
29 | ||
8fed4368 | 30 | static void ide_disk_release(struct device *); |
5fef0e5c BZ |
31 | |
32 | static struct ide_disk_obj *ide_disk_get(struct gendisk *disk) | |
33 | { | |
34 | struct ide_disk_obj *idkp = NULL; | |
35 | ||
36 | mutex_lock(&ide_disk_ref_mutex); | |
37 | idkp = ide_drv_g(disk, ide_disk_obj); | |
38 | if (idkp) { | |
39 | if (ide_device_get(idkp->drive)) | |
40 | idkp = NULL; | |
41 | else | |
8fed4368 | 42 | get_device(&idkp->dev); |
5fef0e5c BZ |
43 | } |
44 | mutex_unlock(&ide_disk_ref_mutex); | |
45 | return idkp; | |
46 | } | |
47 | ||
48 | static void ide_disk_put(struct ide_disk_obj *idkp) | |
49 | { | |
50 | ide_drive_t *drive = idkp->drive; | |
51 | ||
52 | mutex_lock(&ide_disk_ref_mutex); | |
8fed4368 | 53 | put_device(&idkp->dev); |
5fef0e5c BZ |
54 | ide_device_put(drive); |
55 | mutex_unlock(&ide_disk_ref_mutex); | |
56 | } | |
57 | ||
58 | sector_t ide_gd_capacity(ide_drive_t *drive) | |
59 | { | |
60 | return drive->capacity64; | |
61 | } | |
62 | ||
63 | static int ide_gd_probe(ide_drive_t *); | |
64 | ||
65 | static void ide_gd_remove(ide_drive_t *drive) | |
66 | { | |
67 | struct ide_disk_obj *idkp = drive->driver_data; | |
68 | struct gendisk *g = idkp->disk; | |
69 | ||
70 | ide_proc_unregister_driver(drive, idkp->driver); | |
8fed4368 | 71 | device_del(&idkp->dev); |
5fef0e5c | 72 | del_gendisk(g); |
806f80a6 | 73 | drive->disk_ops->flush(drive); |
5fef0e5c | 74 | |
8fed4368 BZ |
75 | mutex_lock(&ide_disk_ref_mutex); |
76 | put_device(&idkp->dev); | |
77 | mutex_unlock(&ide_disk_ref_mutex); | |
5fef0e5c BZ |
78 | } |
79 | ||
8fed4368 | 80 | static void ide_disk_release(struct device *dev) |
5fef0e5c | 81 | { |
8fed4368 | 82 | struct ide_disk_obj *idkp = to_ide_drv(dev, ide_disk_obj); |
5fef0e5c BZ |
83 | ide_drive_t *drive = idkp->drive; |
84 | struct gendisk *g = idkp->disk; | |
85 | ||
806f80a6 | 86 | drive->disk_ops = NULL; |
5fef0e5c BZ |
87 | drive->driver_data = NULL; |
88 | g->private_data = NULL; | |
89 | put_disk(g); | |
90 | kfree(idkp); | |
91 | } | |
92 | ||
93 | /* | |
94 | * On HPA drives the capacity needs to be | |
95 | * reinitilized on resume otherwise the disk | |
96 | * can not be used and a hard reset is required | |
97 | */ | |
98 | static void ide_gd_resume(ide_drive_t *drive) | |
99 | { | |
100 | if (ata_id_hpa_enabled(drive->id)) | |
806f80a6 | 101 | (void)drive->disk_ops->get_capacity(drive); |
5fef0e5c BZ |
102 | } |
103 | ||
b0aedb04 BP |
104 | static const struct dmi_system_id ide_coldreboot_table[] = { |
105 | { | |
106 | /* Acer TravelMate 66x cuts power during reboot */ | |
107 | .ident = "Acer TravelMate 660", | |
108 | .matches = { | |
109 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), | |
110 | DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 660"), | |
111 | }, | |
112 | }, | |
113 | ||
114 | { } /* terminate list */ | |
115 | }; | |
116 | ||
5fef0e5c BZ |
117 | static void ide_gd_shutdown(ide_drive_t *drive) |
118 | { | |
119 | #ifdef CONFIG_ALPHA | |
120 | /* On Alpha, halt(8) doesn't actually turn the machine off, | |
121 | it puts you into the sort of firmware monitor. Typically, | |
122 | it's used to boot another kernel image, so it's not much | |
123 | different from reboot(8). Therefore, we don't need to | |
124 | spin down the disk in this case, especially since Alpha | |
125 | firmware doesn't handle disks in standby mode properly. | |
126 | On the other hand, it's reasonably safe to turn the power | |
127 | off when the shutdown process reaches the firmware prompt, | |
128 | as the firmware initialization takes rather long time - | |
129 | at least 10 seconds, which should be sufficient for | |
130 | the disk to expire its write cache. */ | |
131 | if (system_state != SYSTEM_POWER_OFF) { | |
132 | #else | |
b0aedb04 BP |
133 | if (system_state == SYSTEM_RESTART && |
134 | !dmi_check_system(ide_coldreboot_table)) { | |
5fef0e5c | 135 | #endif |
806f80a6 | 136 | drive->disk_ops->flush(drive); |
5fef0e5c BZ |
137 | return; |
138 | } | |
139 | ||
140 | printk(KERN_INFO "Shutdown: %s\n", drive->name); | |
141 | ||
142 | drive->gendev.bus->suspend(&drive->gendev, PMSG_SUSPEND); | |
143 | } | |
144 | ||
79cb3803 BZ |
145 | #ifdef CONFIG_IDE_PROC_FS |
146 | static ide_proc_entry_t *ide_disk_proc_entries(ide_drive_t *drive) | |
147 | { | |
806f80a6 | 148 | return (drive->media == ide_disk) ? ide_disk_proc : ide_floppy_proc; |
79cb3803 BZ |
149 | } |
150 | ||
151 | static const struct ide_proc_devset *ide_disk_proc_devsets(ide_drive_t *drive) | |
152 | { | |
806f80a6 BZ |
153 | return (drive->media == ide_disk) ? ide_disk_settings |
154 | : ide_floppy_settings; | |
79cb3803 BZ |
155 | } |
156 | #endif | |
157 | ||
806f80a6 BZ |
158 | static ide_startstop_t ide_gd_do_request(ide_drive_t *drive, |
159 | struct request *rq, sector_t sector) | |
160 | { | |
161 | return drive->disk_ops->do_request(drive, rq, sector); | |
162 | } | |
163 | ||
7f3c868b | 164 | static struct ide_driver ide_gd_driver = { |
5fef0e5c BZ |
165 | .gen_driver = { |
166 | .owner = THIS_MODULE, | |
806f80a6 | 167 | .name = "ide-gd", |
5fef0e5c BZ |
168 | .bus = &ide_bus_type, |
169 | }, | |
170 | .probe = ide_gd_probe, | |
171 | .remove = ide_gd_remove, | |
172 | .resume = ide_gd_resume, | |
173 | .shutdown = ide_gd_shutdown, | |
174 | .version = IDE_GD_VERSION, | |
806f80a6 | 175 | .do_request = ide_gd_do_request, |
5fef0e5c | 176 | #ifdef CONFIG_IDE_PROC_FS |
79cb3803 BZ |
177 | .proc_entries = ide_disk_proc_entries, |
178 | .proc_devsets = ide_disk_proc_devsets, | |
5fef0e5c BZ |
179 | #endif |
180 | }; | |
181 | ||
b2f21e05 | 182 | static int ide_gd_open(struct block_device *bdev, fmode_t mode) |
5fef0e5c | 183 | { |
b2f21e05 | 184 | struct gendisk *disk = bdev->bd_disk; |
5fef0e5c BZ |
185 | struct ide_disk_obj *idkp; |
186 | ide_drive_t *drive; | |
806f80a6 | 187 | int ret = 0; |
5fef0e5c BZ |
188 | |
189 | idkp = ide_disk_get(disk); | |
190 | if (idkp == NULL) | |
191 | return -ENXIO; | |
192 | ||
193 | drive = idkp->drive; | |
194 | ||
088b1b88 | 195 | ide_debug_log(IDE_DBG_FUNC, "enter"); |
806f80a6 | 196 | |
5fef0e5c BZ |
197 | idkp->openers++; |
198 | ||
199 | if ((drive->dev_flags & IDE_DFLAG_REMOVABLE) && idkp->openers == 1) { | |
806f80a6 BZ |
200 | drive->dev_flags &= ~IDE_DFLAG_FORMAT_IN_PROGRESS; |
201 | /* Just in case */ | |
202 | ||
203 | ret = drive->disk_ops->init_media(drive, disk); | |
204 | ||
205 | /* | |
206 | * Allow O_NDELAY to open a drive without a disk, or with an | |
207 | * unreadable disk, so that we can get the format capacity | |
208 | * of the drive or begin the format - Sam | |
209 | */ | |
b2f21e05 | 210 | if (ret && (mode & FMODE_NDELAY) == 0) { |
806f80a6 BZ |
211 | ret = -EIO; |
212 | goto out_put_idkp; | |
213 | } | |
214 | ||
b2f21e05 | 215 | if ((drive->dev_flags & IDE_DFLAG_WP) && (mode & FMODE_WRITE)) { |
806f80a6 BZ |
216 | ret = -EROFS; |
217 | goto out_put_idkp; | |
218 | } | |
219 | ||
5fef0e5c BZ |
220 | /* |
221 | * Ignore the return code from door_lock, | |
222 | * since the open() has already succeeded, | |
223 | * and the door_lock is irrelevant at this point. | |
224 | */ | |
806f80a6 | 225 | drive->disk_ops->set_doorlock(drive, disk, 1); |
cedd120c | 226 | drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED; |
b2f21e05 | 227 | check_disk_change(bdev); |
806f80a6 BZ |
228 | } else if (drive->dev_flags & IDE_DFLAG_FORMAT_IN_PROGRESS) { |
229 | ret = -EBUSY; | |
230 | goto out_put_idkp; | |
5fef0e5c BZ |
231 | } |
232 | return 0; | |
806f80a6 BZ |
233 | |
234 | out_put_idkp: | |
235 | idkp->openers--; | |
236 | ide_disk_put(idkp); | |
237 | return ret; | |
5fef0e5c BZ |
238 | } |
239 | ||
b2f21e05 | 240 | static int ide_gd_release(struct gendisk *disk, fmode_t mode) |
5fef0e5c | 241 | { |
5fef0e5c BZ |
242 | struct ide_disk_obj *idkp = ide_drv_g(disk, ide_disk_obj); |
243 | ide_drive_t *drive = idkp->drive; | |
244 | ||
088b1b88 | 245 | ide_debug_log(IDE_DBG_FUNC, "enter"); |
806f80a6 | 246 | |
5fef0e5c | 247 | if (idkp->openers == 1) |
806f80a6 | 248 | drive->disk_ops->flush(drive); |
5fef0e5c | 249 | |
806f80a6 BZ |
250 | if ((drive->dev_flags & IDE_DFLAG_REMOVABLE) && idkp->openers == 1) { |
251 | drive->disk_ops->set_doorlock(drive, disk, 0); | |
252 | drive->dev_flags &= ~IDE_DFLAG_FORMAT_IN_PROGRESS; | |
253 | } | |
5fef0e5c BZ |
254 | |
255 | idkp->openers--; | |
256 | ||
257 | ide_disk_put(idkp); | |
258 | ||
259 | return 0; | |
260 | } | |
261 | ||
262 | static int ide_gd_getgeo(struct block_device *bdev, struct hd_geometry *geo) | |
263 | { | |
264 | struct ide_disk_obj *idkp = ide_drv_g(bdev->bd_disk, ide_disk_obj); | |
265 | ide_drive_t *drive = idkp->drive; | |
266 | ||
267 | geo->heads = drive->bios_head; | |
268 | geo->sectors = drive->bios_sect; | |
269 | geo->cylinders = (u16)drive->bios_cyl; /* truncate */ | |
270 | return 0; | |
271 | } | |
272 | ||
273 | static int ide_gd_media_changed(struct gendisk *disk) | |
274 | { | |
275 | struct ide_disk_obj *idkp = ide_drv_g(disk, ide_disk_obj); | |
276 | ide_drive_t *drive = idkp->drive; | |
cedd120c | 277 | int ret; |
5fef0e5c BZ |
278 | |
279 | /* do not scan partitions twice if this is a removable device */ | |
280 | if (drive->dev_flags & IDE_DFLAG_ATTACH) { | |
281 | drive->dev_flags &= ~IDE_DFLAG_ATTACH; | |
282 | return 0; | |
283 | } | |
284 | ||
cedd120c BZ |
285 | ret = !!(drive->dev_flags & IDE_DFLAG_MEDIA_CHANGED); |
286 | drive->dev_flags &= ~IDE_DFLAG_MEDIA_CHANGED; | |
287 | ||
288 | return ret; | |
5fef0e5c BZ |
289 | } |
290 | ||
c3e33e04 | 291 | static void ide_gd_unlock_native_capacity(struct gendisk *disk) |
e957b60d BZ |
292 | { |
293 | struct ide_disk_obj *idkp = ide_drv_g(disk, ide_disk_obj); | |
294 | ide_drive_t *drive = idkp->drive; | |
295 | const struct ide_disk_ops *disk_ops = drive->disk_ops; | |
296 | ||
c3e33e04 TH |
297 | if (disk_ops->unlock_native_capacity) |
298 | disk_ops->unlock_native_capacity(drive); | |
e957b60d BZ |
299 | } |
300 | ||
5fef0e5c BZ |
301 | static int ide_gd_revalidate_disk(struct gendisk *disk) |
302 | { | |
303 | struct ide_disk_obj *idkp = ide_drv_g(disk, ide_disk_obj); | |
52ebb438 BP |
304 | ide_drive_t *drive = idkp->drive; |
305 | ||
306 | if (ide_gd_media_changed(disk)) | |
307 | drive->disk_ops->get_capacity(drive); | |
308 | ||
309 | set_capacity(disk, ide_gd_capacity(drive)); | |
5fef0e5c BZ |
310 | return 0; |
311 | } | |
312 | ||
b2f21e05 | 313 | static int ide_gd_ioctl(struct block_device *bdev, fmode_t mode, |
806f80a6 BZ |
314 | unsigned int cmd, unsigned long arg) |
315 | { | |
806f80a6 BZ |
316 | struct ide_disk_obj *idkp = ide_drv_g(bdev->bd_disk, ide_disk_obj); |
317 | ide_drive_t *drive = idkp->drive; | |
318 | ||
b2f21e05 | 319 | return drive->disk_ops->ioctl(drive, bdev, mode, cmd, arg); |
806f80a6 BZ |
320 | } |
321 | ||
83d5cde4 | 322 | static const struct block_device_operations ide_gd_ops = { |
5fef0e5c | 323 | .owner = THIS_MODULE, |
b2f21e05 AV |
324 | .open = ide_gd_open, |
325 | .release = ide_gd_release, | |
8a6cfeb6 | 326 | .ioctl = ide_gd_ioctl, |
5fef0e5c BZ |
327 | .getgeo = ide_gd_getgeo, |
328 | .media_changed = ide_gd_media_changed, | |
c3e33e04 | 329 | .unlock_native_capacity = ide_gd_unlock_native_capacity, |
5fef0e5c BZ |
330 | .revalidate_disk = ide_gd_revalidate_disk |
331 | }; | |
332 | ||
333 | static int ide_gd_probe(ide_drive_t *drive) | |
334 | { | |
806f80a6 | 335 | const struct ide_disk_ops *disk_ops = NULL; |
5fef0e5c BZ |
336 | struct ide_disk_obj *idkp; |
337 | struct gendisk *g; | |
338 | ||
339 | /* strstr("foo", "") is non-NULL */ | |
806f80a6 BZ |
340 | if (!strstr("ide-gd", drive->driver_req)) |
341 | goto failed; | |
342 | ||
343 | #ifdef CONFIG_IDE_GD_ATA | |
344 | if (drive->media == ide_disk) | |
345 | disk_ops = &ide_ata_disk_ops; | |
346 | #endif | |
347 | #ifdef CONFIG_IDE_GD_ATAPI | |
348 | if (drive->media == ide_floppy) | |
349 | disk_ops = &ide_atapi_disk_ops; | |
350 | #endif | |
351 | if (disk_ops == NULL) | |
5fef0e5c BZ |
352 | goto failed; |
353 | ||
806f80a6 BZ |
354 | if (disk_ops->check(drive, DRV_NAME) == 0) { |
355 | printk(KERN_ERR PFX "%s: not supported by this driver\n", | |
356 | drive->name); | |
5fef0e5c | 357 | goto failed; |
806f80a6 | 358 | } |
5fef0e5c BZ |
359 | |
360 | idkp = kzalloc(sizeof(*idkp), GFP_KERNEL); | |
806f80a6 BZ |
361 | if (!idkp) { |
362 | printk(KERN_ERR PFX "%s: can't allocate a disk structure\n", | |
363 | drive->name); | |
5fef0e5c | 364 | goto failed; |
806f80a6 | 365 | } |
5fef0e5c BZ |
366 | |
367 | g = alloc_disk_node(IDE_DISK_MINORS, hwif_to_node(drive->hwif)); | |
368 | if (!g) | |
369 | goto out_free_idkp; | |
370 | ||
371 | ide_init_disk(g, drive); | |
372 | ||
8fed4368 BZ |
373 | idkp->dev.parent = &drive->gendev; |
374 | idkp->dev.release = ide_disk_release; | |
375 | dev_set_name(&idkp->dev, dev_name(&drive->gendev)); | |
376 | ||
377 | if (device_register(&idkp->dev)) | |
378 | goto out_free_disk; | |
5fef0e5c BZ |
379 | |
380 | idkp->drive = drive; | |
381 | idkp->driver = &ide_gd_driver; | |
382 | idkp->disk = g; | |
383 | ||
384 | g->private_data = &idkp->driver; | |
385 | ||
386 | drive->driver_data = idkp; | |
806f80a6 BZ |
387 | drive->debug_mask = debug_mask; |
388 | drive->disk_ops = disk_ops; | |
5fef0e5c | 389 | |
806f80a6 | 390 | disk_ops->setup(drive); |
5fef0e5c BZ |
391 | |
392 | set_capacity(g, ide_gd_capacity(drive)); | |
393 | ||
394 | g->minors = IDE_DISK_MINORS; | |
395 | g->driverfs_dev = &drive->gendev; | |
396 | g->flags |= GENHD_FL_EXT_DEVT; | |
397 | if (drive->dev_flags & IDE_DFLAG_REMOVABLE) | |
398 | g->flags = GENHD_FL_REMOVABLE; | |
399 | g->fops = &ide_gd_ops; | |
400 | add_disk(g); | |
401 | return 0; | |
402 | ||
8fed4368 BZ |
403 | out_free_disk: |
404 | put_disk(g); | |
5fef0e5c BZ |
405 | out_free_idkp: |
406 | kfree(idkp); | |
407 | failed: | |
408 | return -ENODEV; | |
409 | } | |
410 | ||
411 | static int __init ide_gd_init(void) | |
412 | { | |
806f80a6 | 413 | printk(KERN_INFO DRV_NAME " driver " IDE_GD_VERSION "\n"); |
5fef0e5c BZ |
414 | return driver_register(&ide_gd_driver.gen_driver); |
415 | } | |
416 | ||
417 | static void __exit ide_gd_exit(void) | |
418 | { | |
419 | driver_unregister(&ide_gd_driver.gen_driver); | |
420 | } | |
421 | ||
422 | MODULE_ALIAS("ide:*m-disk*"); | |
423 | MODULE_ALIAS("ide-disk"); | |
806f80a6 BZ |
424 | MODULE_ALIAS("ide:*m-floppy*"); |
425 | MODULE_ALIAS("ide-floppy"); | |
5fef0e5c BZ |
426 | module_init(ide_gd_init); |
427 | module_exit(ide_gd_exit); | |
428 | MODULE_LICENSE("GPL"); | |
806f80a6 | 429 | MODULE_DESCRIPTION("generic ATA/ATAPI disk driver"); |