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> |
5fef0e5c BZ |
11 | |
12 | #if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT) | |
13 | #define IDE_DISK_MINORS (1 << PARTN_BITS) | |
14 | #else | |
15 | #define IDE_DISK_MINORS 0 | |
16 | #endif | |
17 | ||
18 | #include "ide-disk.h" | |
806f80a6 | 19 | #include "ide-floppy.h" |
5fef0e5c BZ |
20 | |
21 | #define IDE_GD_VERSION "1.18" | |
22 | ||
806f80a6 BZ |
23 | /* module parameters */ |
24 | static unsigned long debug_mask; | |
25 | module_param(debug_mask, ulong, 0644); | |
26 | ||
5fef0e5c BZ |
27 | static DEFINE_MUTEX(ide_disk_ref_mutex); |
28 | ||
8fed4368 | 29 | static void ide_disk_release(struct device *); |
5fef0e5c BZ |
30 | |
31 | static struct ide_disk_obj *ide_disk_get(struct gendisk *disk) | |
32 | { | |
33 | struct ide_disk_obj *idkp = NULL; | |
34 | ||
35 | mutex_lock(&ide_disk_ref_mutex); | |
36 | idkp = ide_drv_g(disk, ide_disk_obj); | |
37 | if (idkp) { | |
38 | if (ide_device_get(idkp->drive)) | |
39 | idkp = NULL; | |
40 | else | |
8fed4368 | 41 | get_device(&idkp->dev); |
5fef0e5c BZ |
42 | } |
43 | mutex_unlock(&ide_disk_ref_mutex); | |
44 | return idkp; | |
45 | } | |
46 | ||
47 | static void ide_disk_put(struct ide_disk_obj *idkp) | |
48 | { | |
49 | ide_drive_t *drive = idkp->drive; | |
50 | ||
51 | mutex_lock(&ide_disk_ref_mutex); | |
8fed4368 | 52 | put_device(&idkp->dev); |
5fef0e5c BZ |
53 | ide_device_put(drive); |
54 | mutex_unlock(&ide_disk_ref_mutex); | |
55 | } | |
56 | ||
57 | sector_t ide_gd_capacity(ide_drive_t *drive) | |
58 | { | |
59 | return drive->capacity64; | |
60 | } | |
61 | ||
62 | static int ide_gd_probe(ide_drive_t *); | |
63 | ||
64 | static void ide_gd_remove(ide_drive_t *drive) | |
65 | { | |
66 | struct ide_disk_obj *idkp = drive->driver_data; | |
67 | struct gendisk *g = idkp->disk; | |
68 | ||
69 | ide_proc_unregister_driver(drive, idkp->driver); | |
8fed4368 | 70 | device_del(&idkp->dev); |
5fef0e5c | 71 | del_gendisk(g); |
806f80a6 | 72 | drive->disk_ops->flush(drive); |
5fef0e5c | 73 | |
8fed4368 BZ |
74 | mutex_lock(&ide_disk_ref_mutex); |
75 | put_device(&idkp->dev); | |
76 | mutex_unlock(&ide_disk_ref_mutex); | |
5fef0e5c BZ |
77 | } |
78 | ||
8fed4368 | 79 | static void ide_disk_release(struct device *dev) |
5fef0e5c | 80 | { |
8fed4368 | 81 | struct ide_disk_obj *idkp = to_ide_drv(dev, ide_disk_obj); |
5fef0e5c BZ |
82 | ide_drive_t *drive = idkp->drive; |
83 | struct gendisk *g = idkp->disk; | |
84 | ||
806f80a6 | 85 | drive->disk_ops = NULL; |
5fef0e5c BZ |
86 | drive->driver_data = NULL; |
87 | g->private_data = NULL; | |
88 | put_disk(g); | |
89 | kfree(idkp); | |
90 | } | |
91 | ||
92 | /* | |
93 | * On HPA drives the capacity needs to be | |
94 | * reinitilized on resume otherwise the disk | |
95 | * can not be used and a hard reset is required | |
96 | */ | |
97 | static void ide_gd_resume(ide_drive_t *drive) | |
98 | { | |
99 | if (ata_id_hpa_enabled(drive->id)) | |
806f80a6 | 100 | (void)drive->disk_ops->get_capacity(drive); |
5fef0e5c BZ |
101 | } |
102 | ||
b0aedb04 BP |
103 | static const struct dmi_system_id ide_coldreboot_table[] = { |
104 | { | |
105 | /* Acer TravelMate 66x cuts power during reboot */ | |
106 | .ident = "Acer TravelMate 660", | |
107 | .matches = { | |
108 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), | |
109 | DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 660"), | |
110 | }, | |
111 | }, | |
112 | ||
113 | { } /* terminate list */ | |
114 | }; | |
115 | ||
5fef0e5c BZ |
116 | static void ide_gd_shutdown(ide_drive_t *drive) |
117 | { | |
118 | #ifdef CONFIG_ALPHA | |
119 | /* On Alpha, halt(8) doesn't actually turn the machine off, | |
120 | it puts you into the sort of firmware monitor. Typically, | |
121 | it's used to boot another kernel image, so it's not much | |
122 | different from reboot(8). Therefore, we don't need to | |
123 | spin down the disk in this case, especially since Alpha | |
124 | firmware doesn't handle disks in standby mode properly. | |
125 | On the other hand, it's reasonably safe to turn the power | |
126 | off when the shutdown process reaches the firmware prompt, | |
127 | as the firmware initialization takes rather long time - | |
128 | at least 10 seconds, which should be sufficient for | |
129 | the disk to expire its write cache. */ | |
130 | if (system_state != SYSTEM_POWER_OFF) { | |
131 | #else | |
b0aedb04 BP |
132 | if (system_state == SYSTEM_RESTART && |
133 | !dmi_check_system(ide_coldreboot_table)) { | |
5fef0e5c | 134 | #endif |
806f80a6 | 135 | drive->disk_ops->flush(drive); |
5fef0e5c BZ |
136 | return; |
137 | } | |
138 | ||
139 | printk(KERN_INFO "Shutdown: %s\n", drive->name); | |
140 | ||
141 | drive->gendev.bus->suspend(&drive->gendev, PMSG_SUSPEND); | |
142 | } | |
143 | ||
79cb3803 BZ |
144 | #ifdef CONFIG_IDE_PROC_FS |
145 | static ide_proc_entry_t *ide_disk_proc_entries(ide_drive_t *drive) | |
146 | { | |
806f80a6 | 147 | return (drive->media == ide_disk) ? ide_disk_proc : ide_floppy_proc; |
79cb3803 BZ |
148 | } |
149 | ||
150 | static const struct ide_proc_devset *ide_disk_proc_devsets(ide_drive_t *drive) | |
151 | { | |
806f80a6 BZ |
152 | return (drive->media == ide_disk) ? ide_disk_settings |
153 | : ide_floppy_settings; | |
79cb3803 BZ |
154 | } |
155 | #endif | |
156 | ||
806f80a6 BZ |
157 | static ide_startstop_t ide_gd_do_request(ide_drive_t *drive, |
158 | struct request *rq, sector_t sector) | |
159 | { | |
160 | return drive->disk_ops->do_request(drive, rq, sector); | |
161 | } | |
162 | ||
7f3c868b | 163 | static struct ide_driver ide_gd_driver = { |
5fef0e5c BZ |
164 | .gen_driver = { |
165 | .owner = THIS_MODULE, | |
806f80a6 | 166 | .name = "ide-gd", |
5fef0e5c BZ |
167 | .bus = &ide_bus_type, |
168 | }, | |
169 | .probe = ide_gd_probe, | |
170 | .remove = ide_gd_remove, | |
171 | .resume = ide_gd_resume, | |
172 | .shutdown = ide_gd_shutdown, | |
173 | .version = IDE_GD_VERSION, | |
806f80a6 | 174 | .do_request = ide_gd_do_request, |
5fef0e5c | 175 | #ifdef CONFIG_IDE_PROC_FS |
79cb3803 BZ |
176 | .proc_entries = ide_disk_proc_entries, |
177 | .proc_devsets = ide_disk_proc_devsets, | |
5fef0e5c BZ |
178 | #endif |
179 | }; | |
180 | ||
b2f21e05 | 181 | static int ide_gd_open(struct block_device *bdev, fmode_t mode) |
5fef0e5c | 182 | { |
b2f21e05 | 183 | struct gendisk *disk = bdev->bd_disk; |
5fef0e5c BZ |
184 | struct ide_disk_obj *idkp; |
185 | ide_drive_t *drive; | |
806f80a6 | 186 | int ret = 0; |
5fef0e5c BZ |
187 | |
188 | idkp = ide_disk_get(disk); | |
189 | if (idkp == NULL) | |
190 | return -ENXIO; | |
191 | ||
192 | drive = idkp->drive; | |
193 | ||
088b1b88 | 194 | ide_debug_log(IDE_DBG_FUNC, "enter"); |
806f80a6 | 195 | |
5fef0e5c BZ |
196 | idkp->openers++; |
197 | ||
198 | if ((drive->dev_flags & IDE_DFLAG_REMOVABLE) && idkp->openers == 1) { | |
806f80a6 BZ |
199 | drive->dev_flags &= ~IDE_DFLAG_FORMAT_IN_PROGRESS; |
200 | /* Just in case */ | |
201 | ||
202 | ret = drive->disk_ops->init_media(drive, disk); | |
203 | ||
204 | /* | |
205 | * Allow O_NDELAY to open a drive without a disk, or with an | |
206 | * unreadable disk, so that we can get the format capacity | |
207 | * of the drive or begin the format - Sam | |
208 | */ | |
b2f21e05 | 209 | if (ret && (mode & FMODE_NDELAY) == 0) { |
806f80a6 BZ |
210 | ret = -EIO; |
211 | goto out_put_idkp; | |
212 | } | |
213 | ||
b2f21e05 | 214 | if ((drive->dev_flags & IDE_DFLAG_WP) && (mode & FMODE_WRITE)) { |
806f80a6 BZ |
215 | ret = -EROFS; |
216 | goto out_put_idkp; | |
217 | } | |
218 | ||
5fef0e5c BZ |
219 | /* |
220 | * Ignore the return code from door_lock, | |
221 | * since the open() has already succeeded, | |
222 | * and the door_lock is irrelevant at this point. | |
223 | */ | |
806f80a6 | 224 | drive->disk_ops->set_doorlock(drive, disk, 1); |
cedd120c | 225 | drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED; |
b2f21e05 | 226 | check_disk_change(bdev); |
806f80a6 BZ |
227 | } else if (drive->dev_flags & IDE_DFLAG_FORMAT_IN_PROGRESS) { |
228 | ret = -EBUSY; | |
229 | goto out_put_idkp; | |
5fef0e5c BZ |
230 | } |
231 | return 0; | |
806f80a6 BZ |
232 | |
233 | out_put_idkp: | |
234 | idkp->openers--; | |
235 | ide_disk_put(idkp); | |
236 | return ret; | |
5fef0e5c BZ |
237 | } |
238 | ||
b2f21e05 | 239 | static int ide_gd_release(struct gendisk *disk, fmode_t mode) |
5fef0e5c | 240 | { |
5fef0e5c BZ |
241 | struct ide_disk_obj *idkp = ide_drv_g(disk, ide_disk_obj); |
242 | ide_drive_t *drive = idkp->drive; | |
243 | ||
088b1b88 | 244 | ide_debug_log(IDE_DBG_FUNC, "enter"); |
806f80a6 | 245 | |
5fef0e5c | 246 | if (idkp->openers == 1) |
806f80a6 | 247 | drive->disk_ops->flush(drive); |
5fef0e5c | 248 | |
806f80a6 BZ |
249 | if ((drive->dev_flags & IDE_DFLAG_REMOVABLE) && idkp->openers == 1) { |
250 | drive->disk_ops->set_doorlock(drive, disk, 0); | |
251 | drive->dev_flags &= ~IDE_DFLAG_FORMAT_IN_PROGRESS; | |
252 | } | |
5fef0e5c BZ |
253 | |
254 | idkp->openers--; | |
255 | ||
256 | ide_disk_put(idkp); | |
257 | ||
258 | return 0; | |
259 | } | |
260 | ||
261 | static int ide_gd_getgeo(struct block_device *bdev, struct hd_geometry *geo) | |
262 | { | |
263 | struct ide_disk_obj *idkp = ide_drv_g(bdev->bd_disk, ide_disk_obj); | |
264 | ide_drive_t *drive = idkp->drive; | |
265 | ||
266 | geo->heads = drive->bios_head; | |
267 | geo->sectors = drive->bios_sect; | |
268 | geo->cylinders = (u16)drive->bios_cyl; /* truncate */ | |
269 | return 0; | |
270 | } | |
271 | ||
272 | static int ide_gd_media_changed(struct gendisk *disk) | |
273 | { | |
274 | struct ide_disk_obj *idkp = ide_drv_g(disk, ide_disk_obj); | |
275 | ide_drive_t *drive = idkp->drive; | |
cedd120c | 276 | int ret; |
5fef0e5c BZ |
277 | |
278 | /* do not scan partitions twice if this is a removable device */ | |
279 | if (drive->dev_flags & IDE_DFLAG_ATTACH) { | |
280 | drive->dev_flags &= ~IDE_DFLAG_ATTACH; | |
281 | return 0; | |
282 | } | |
283 | ||
cedd120c BZ |
284 | ret = !!(drive->dev_flags & IDE_DFLAG_MEDIA_CHANGED); |
285 | drive->dev_flags &= ~IDE_DFLAG_MEDIA_CHANGED; | |
286 | ||
287 | return ret; | |
5fef0e5c BZ |
288 | } |
289 | ||
e957b60d BZ |
290 | static unsigned long long ide_gd_set_capacity(struct gendisk *disk, |
291 | unsigned long long capacity) | |
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 | ||
297 | if (disk_ops->set_capacity) | |
298 | return disk_ops->set_capacity(drive, capacity); | |
299 | ||
300 | return drive->capacity64; | |
301 | } | |
302 | ||
5fef0e5c BZ |
303 | static int ide_gd_revalidate_disk(struct gendisk *disk) |
304 | { | |
305 | struct ide_disk_obj *idkp = ide_drv_g(disk, ide_disk_obj); | |
52ebb438 BP |
306 | ide_drive_t *drive = idkp->drive; |
307 | ||
308 | if (ide_gd_media_changed(disk)) | |
309 | drive->disk_ops->get_capacity(drive); | |
310 | ||
311 | set_capacity(disk, ide_gd_capacity(drive)); | |
5fef0e5c BZ |
312 | return 0; |
313 | } | |
314 | ||
b2f21e05 | 315 | static int ide_gd_ioctl(struct block_device *bdev, fmode_t mode, |
806f80a6 BZ |
316 | unsigned int cmd, unsigned long arg) |
317 | { | |
806f80a6 BZ |
318 | struct ide_disk_obj *idkp = ide_drv_g(bdev->bd_disk, ide_disk_obj); |
319 | ide_drive_t *drive = idkp->drive; | |
320 | ||
b2f21e05 | 321 | return drive->disk_ops->ioctl(drive, bdev, mode, cmd, arg); |
806f80a6 BZ |
322 | } |
323 | ||
83d5cde4 | 324 | static const struct block_device_operations ide_gd_ops = { |
5fef0e5c | 325 | .owner = THIS_MODULE, |
b2f21e05 AV |
326 | .open = ide_gd_open, |
327 | .release = ide_gd_release, | |
328 | .locked_ioctl = ide_gd_ioctl, | |
5fef0e5c BZ |
329 | .getgeo = ide_gd_getgeo, |
330 | .media_changed = ide_gd_media_changed, | |
e957b60d | 331 | .set_capacity = ide_gd_set_capacity, |
5fef0e5c BZ |
332 | .revalidate_disk = ide_gd_revalidate_disk |
333 | }; | |
334 | ||
335 | static int ide_gd_probe(ide_drive_t *drive) | |
336 | { | |
806f80a6 | 337 | const struct ide_disk_ops *disk_ops = NULL; |
5fef0e5c BZ |
338 | struct ide_disk_obj *idkp; |
339 | struct gendisk *g; | |
340 | ||
341 | /* strstr("foo", "") is non-NULL */ | |
806f80a6 BZ |
342 | if (!strstr("ide-gd", drive->driver_req)) |
343 | goto failed; | |
344 | ||
345 | #ifdef CONFIG_IDE_GD_ATA | |
346 | if (drive->media == ide_disk) | |
347 | disk_ops = &ide_ata_disk_ops; | |
348 | #endif | |
349 | #ifdef CONFIG_IDE_GD_ATAPI | |
350 | if (drive->media == ide_floppy) | |
351 | disk_ops = &ide_atapi_disk_ops; | |
352 | #endif | |
353 | if (disk_ops == NULL) | |
5fef0e5c BZ |
354 | goto failed; |
355 | ||
806f80a6 BZ |
356 | if (disk_ops->check(drive, DRV_NAME) == 0) { |
357 | printk(KERN_ERR PFX "%s: not supported by this driver\n", | |
358 | drive->name); | |
5fef0e5c | 359 | goto failed; |
806f80a6 | 360 | } |
5fef0e5c BZ |
361 | |
362 | idkp = kzalloc(sizeof(*idkp), GFP_KERNEL); | |
806f80a6 BZ |
363 | if (!idkp) { |
364 | printk(KERN_ERR PFX "%s: can't allocate a disk structure\n", | |
365 | drive->name); | |
5fef0e5c | 366 | goto failed; |
806f80a6 | 367 | } |
5fef0e5c BZ |
368 | |
369 | g = alloc_disk_node(IDE_DISK_MINORS, hwif_to_node(drive->hwif)); | |
370 | if (!g) | |
371 | goto out_free_idkp; | |
372 | ||
373 | ide_init_disk(g, drive); | |
374 | ||
8fed4368 BZ |
375 | idkp->dev.parent = &drive->gendev; |
376 | idkp->dev.release = ide_disk_release; | |
377 | dev_set_name(&idkp->dev, dev_name(&drive->gendev)); | |
378 | ||
379 | if (device_register(&idkp->dev)) | |
380 | goto out_free_disk; | |
5fef0e5c BZ |
381 | |
382 | idkp->drive = drive; | |
383 | idkp->driver = &ide_gd_driver; | |
384 | idkp->disk = g; | |
385 | ||
386 | g->private_data = &idkp->driver; | |
387 | ||
388 | drive->driver_data = idkp; | |
806f80a6 BZ |
389 | drive->debug_mask = debug_mask; |
390 | drive->disk_ops = disk_ops; | |
5fef0e5c | 391 | |
806f80a6 | 392 | disk_ops->setup(drive); |
5fef0e5c BZ |
393 | |
394 | set_capacity(g, ide_gd_capacity(drive)); | |
395 | ||
396 | g->minors = IDE_DISK_MINORS; | |
397 | g->driverfs_dev = &drive->gendev; | |
398 | g->flags |= GENHD_FL_EXT_DEVT; | |
399 | if (drive->dev_flags & IDE_DFLAG_REMOVABLE) | |
400 | g->flags = GENHD_FL_REMOVABLE; | |
401 | g->fops = &ide_gd_ops; | |
402 | add_disk(g); | |
403 | return 0; | |
404 | ||
8fed4368 BZ |
405 | out_free_disk: |
406 | put_disk(g); | |
5fef0e5c BZ |
407 | out_free_idkp: |
408 | kfree(idkp); | |
409 | failed: | |
410 | return -ENODEV; | |
411 | } | |
412 | ||
413 | static int __init ide_gd_init(void) | |
414 | { | |
806f80a6 | 415 | printk(KERN_INFO DRV_NAME " driver " IDE_GD_VERSION "\n"); |
5fef0e5c BZ |
416 | return driver_register(&ide_gd_driver.gen_driver); |
417 | } | |
418 | ||
419 | static void __exit ide_gd_exit(void) | |
420 | { | |
421 | driver_unregister(&ide_gd_driver.gen_driver); | |
422 | } | |
423 | ||
424 | MODULE_ALIAS("ide:*m-disk*"); | |
425 | MODULE_ALIAS("ide-disk"); | |
806f80a6 BZ |
426 | MODULE_ALIAS("ide:*m-floppy*"); |
427 | MODULE_ALIAS("ide-floppy"); | |
5fef0e5c BZ |
428 | module_init(ide_gd_init); |
429 | module_exit(ide_gd_exit); | |
430 | MODULE_LICENSE("GPL"); | |
806f80a6 | 431 | MODULE_DESCRIPTION("generic ATA/ATAPI disk driver"); |