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>
9 #include <linux/hdreg.h>
10 #include <linux/dmi.h>
11 #include <linux/slab.h>
13 #if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT)
14 #define IDE_DISK_MINORS (1 << PARTN_BITS)
16 #define IDE_DISK_MINORS 0
20 #include "ide-floppy.h"
22 #define IDE_GD_VERSION "1.18"
24 /* module parameters */
25 static DEFINE_MUTEX(ide_gd_mutex);
26 static unsigned long debug_mask;
27 module_param(debug_mask, ulong, 0644);
29 static DEFINE_MUTEX(ide_disk_ref_mutex);
31 static void ide_disk_release(struct device *);
33 static struct ide_disk_obj *ide_disk_get(struct gendisk *disk)
35 struct ide_disk_obj *idkp = NULL;
37 mutex_lock(&ide_disk_ref_mutex);
38 idkp = ide_drv_g(disk, ide_disk_obj);
40 if (ide_device_get(idkp->drive))
43 get_device(&idkp->dev);
45 mutex_unlock(&ide_disk_ref_mutex);
49 static void ide_disk_put(struct ide_disk_obj *idkp)
51 ide_drive_t *drive = idkp->drive;
53 mutex_lock(&ide_disk_ref_mutex);
54 put_device(&idkp->dev);
55 ide_device_put(drive);
56 mutex_unlock(&ide_disk_ref_mutex);
59 sector_t ide_gd_capacity(ide_drive_t *drive)
61 return drive->capacity64;
64 static int ide_gd_probe(ide_drive_t *);
66 static void ide_gd_remove(ide_drive_t *drive)
68 struct ide_disk_obj *idkp = drive->driver_data;
69 struct gendisk *g = idkp->disk;
71 ide_proc_unregister_driver(drive, idkp->driver);
72 device_del(&idkp->dev);
74 drive->disk_ops->flush(drive);
76 mutex_lock(&ide_disk_ref_mutex);
77 put_device(&idkp->dev);
78 mutex_unlock(&ide_disk_ref_mutex);
81 static void ide_disk_release(struct device *dev)
83 struct ide_disk_obj *idkp = to_ide_drv(dev, ide_disk_obj);
84 ide_drive_t *drive = idkp->drive;
85 struct gendisk *g = idkp->disk;
87 drive->disk_ops = NULL;
88 drive->driver_data = NULL;
89 g->private_data = NULL;
95 * On HPA drives the capacity needs to be
96 * reinitialized on resume otherwise the disk
97 * can not be used and a hard reset is required
99 static void ide_gd_resume(ide_drive_t *drive)
101 if (ata_id_hpa_enabled(drive->id))
102 (void)drive->disk_ops->get_capacity(drive);
105 static const struct dmi_system_id ide_coldreboot_table[] = {
107 /* Acer TravelMate 66x cuts power during reboot */
108 .ident = "Acer TravelMate 660",
110 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
111 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 660"),
115 { } /* terminate list */
118 static void ide_gd_shutdown(ide_drive_t *drive)
121 /* On Alpha, halt(8) doesn't actually turn the machine off,
122 it puts you into the sort of firmware monitor. Typically,
123 it's used to boot another kernel image, so it's not much
124 different from reboot(8). Therefore, we don't need to
125 spin down the disk in this case, especially since Alpha
126 firmware doesn't handle disks in standby mode properly.
127 On the other hand, it's reasonably safe to turn the power
128 off when the shutdown process reaches the firmware prompt,
129 as the firmware initialization takes rather long time -
130 at least 10 seconds, which should be sufficient for
131 the disk to expire its write cache. */
132 if (system_state != SYSTEM_POWER_OFF) {
134 if (system_state == SYSTEM_RESTART &&
135 !dmi_check_system(ide_coldreboot_table)) {
137 drive->disk_ops->flush(drive);
141 printk(KERN_INFO "Shutdown: %s\n", drive->name);
143 drive->gendev.bus->suspend(&drive->gendev, PMSG_SUSPEND);
146 #ifdef CONFIG_IDE_PROC_FS
147 static ide_proc_entry_t *ide_disk_proc_entries(ide_drive_t *drive)
149 return (drive->media == ide_disk) ? ide_disk_proc : ide_floppy_proc;
152 static const struct ide_proc_devset *ide_disk_proc_devsets(ide_drive_t *drive)
154 return (drive->media == ide_disk) ? ide_disk_settings
155 : ide_floppy_settings;
159 static ide_startstop_t ide_gd_do_request(ide_drive_t *drive,
160 struct request *rq, sector_t sector)
162 return drive->disk_ops->do_request(drive, rq, sector);
165 static struct ide_driver ide_gd_driver = {
167 .owner = THIS_MODULE,
169 .bus = &ide_bus_type,
171 .probe = ide_gd_probe,
172 .remove = ide_gd_remove,
173 .resume = ide_gd_resume,
174 .shutdown = ide_gd_shutdown,
175 .version = IDE_GD_VERSION,
176 .do_request = ide_gd_do_request,
177 #ifdef CONFIG_IDE_PROC_FS
178 .proc_entries = ide_disk_proc_entries,
179 .proc_devsets = ide_disk_proc_devsets,
183 static int ide_gd_open(struct block_device *bdev, fmode_t mode)
185 struct gendisk *disk = bdev->bd_disk;
186 struct ide_disk_obj *idkp;
190 idkp = ide_disk_get(disk);
196 ide_debug_log(IDE_DBG_FUNC, "enter");
200 if ((drive->dev_flags & IDE_DFLAG_REMOVABLE) && idkp->openers == 1) {
201 drive->dev_flags &= ~IDE_DFLAG_FORMAT_IN_PROGRESS;
204 ret = drive->disk_ops->init_media(drive, disk);
207 * Allow O_NDELAY to open a drive without a disk, or with an
208 * unreadable disk, so that we can get the format capacity
209 * of the drive or begin the format - Sam
211 if (ret && (mode & FMODE_NDELAY) == 0) {
216 if ((drive->dev_flags & IDE_DFLAG_WP) && (mode & FMODE_WRITE)) {
222 * Ignore the return code from door_lock,
223 * since the open() has already succeeded,
224 * and the door_lock is irrelevant at this point.
226 drive->disk_ops->set_doorlock(drive, disk, 1);
227 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
228 check_disk_change(bdev);
229 } else if (drive->dev_flags & IDE_DFLAG_FORMAT_IN_PROGRESS) {
241 static int ide_gd_unlocked_open(struct block_device *bdev, fmode_t mode)
245 mutex_lock(&ide_gd_mutex);
246 ret = ide_gd_open(bdev, mode);
247 mutex_unlock(&ide_gd_mutex);
253 static void ide_gd_release(struct gendisk *disk, fmode_t mode)
255 struct ide_disk_obj *idkp = ide_drv_g(disk, ide_disk_obj);
256 ide_drive_t *drive = idkp->drive;
258 ide_debug_log(IDE_DBG_FUNC, "enter");
260 mutex_lock(&ide_gd_mutex);
261 if (idkp->openers == 1)
262 drive->disk_ops->flush(drive);
264 if ((drive->dev_flags & IDE_DFLAG_REMOVABLE) && idkp->openers == 1) {
265 drive->disk_ops->set_doorlock(drive, disk, 0);
266 drive->dev_flags &= ~IDE_DFLAG_FORMAT_IN_PROGRESS;
272 mutex_unlock(&ide_gd_mutex);
275 static int ide_gd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
277 struct ide_disk_obj *idkp = ide_drv_g(bdev->bd_disk, ide_disk_obj);
278 ide_drive_t *drive = idkp->drive;
280 geo->heads = drive->bios_head;
281 geo->sectors = drive->bios_sect;
282 geo->cylinders = (u16)drive->bios_cyl; /* truncate */
286 static unsigned int ide_gd_check_events(struct gendisk *disk,
287 unsigned int clearing)
289 struct ide_disk_obj *idkp = ide_drv_g(disk, ide_disk_obj);
290 ide_drive_t *drive = idkp->drive;
293 /* do not scan partitions twice if this is a removable device */
294 if (drive->dev_flags & IDE_DFLAG_ATTACH) {
295 drive->dev_flags &= ~IDE_DFLAG_ATTACH;
300 * The following is used to force revalidation on the first open on
301 * removeable devices, and never gets reported to userland as
302 * DISK_EVENT_FLAG_UEVENT isn't set in genhd->event_flags.
303 * This is intended as removable ide disk can't really detect
304 * MEDIA_CHANGE events.
306 ret = drive->dev_flags & IDE_DFLAG_MEDIA_CHANGED;
307 drive->dev_flags &= ~IDE_DFLAG_MEDIA_CHANGED;
309 return ret ? DISK_EVENT_MEDIA_CHANGE : 0;
312 static void ide_gd_unlock_native_capacity(struct gendisk *disk)
314 struct ide_disk_obj *idkp = ide_drv_g(disk, ide_disk_obj);
315 ide_drive_t *drive = idkp->drive;
316 const struct ide_disk_ops *disk_ops = drive->disk_ops;
318 if (disk_ops->unlock_native_capacity)
319 disk_ops->unlock_native_capacity(drive);
322 static int ide_gd_revalidate_disk(struct gendisk *disk)
324 struct ide_disk_obj *idkp = ide_drv_g(disk, ide_disk_obj);
325 ide_drive_t *drive = idkp->drive;
327 if (ide_gd_check_events(disk, 0))
328 drive->disk_ops->get_capacity(drive);
330 set_capacity(disk, ide_gd_capacity(drive));
334 static int ide_gd_ioctl(struct block_device *bdev, fmode_t mode,
335 unsigned int cmd, unsigned long arg)
337 struct ide_disk_obj *idkp = ide_drv_g(bdev->bd_disk, ide_disk_obj);
338 ide_drive_t *drive = idkp->drive;
340 return drive->disk_ops->ioctl(drive, bdev, mode, cmd, arg);
343 static const struct block_device_operations ide_gd_ops = {
344 .owner = THIS_MODULE,
345 .open = ide_gd_unlocked_open,
346 .release = ide_gd_release,
347 .ioctl = ide_gd_ioctl,
348 .getgeo = ide_gd_getgeo,
349 .check_events = ide_gd_check_events,
350 .unlock_native_capacity = ide_gd_unlock_native_capacity,
351 .revalidate_disk = ide_gd_revalidate_disk
354 static int ide_gd_probe(ide_drive_t *drive)
356 const struct ide_disk_ops *disk_ops = NULL;
357 struct ide_disk_obj *idkp;
360 /* strstr("foo", "") is non-NULL */
361 if (!strstr("ide-gd", drive->driver_req))
364 #ifdef CONFIG_IDE_GD_ATA
365 if (drive->media == ide_disk)
366 disk_ops = &ide_ata_disk_ops;
368 #ifdef CONFIG_IDE_GD_ATAPI
369 if (drive->media == ide_floppy)
370 disk_ops = &ide_atapi_disk_ops;
372 if (disk_ops == NULL)
375 if (disk_ops->check(drive, DRV_NAME) == 0) {
376 printk(KERN_ERR PFX "%s: not supported by this driver\n",
381 idkp = kzalloc(sizeof(*idkp), GFP_KERNEL);
383 printk(KERN_ERR PFX "%s: can't allocate a disk structure\n",
388 g = alloc_disk_node(IDE_DISK_MINORS, hwif_to_node(drive->hwif));
392 ide_init_disk(g, drive);
394 idkp->dev.parent = &drive->gendev;
395 idkp->dev.release = ide_disk_release;
396 dev_set_name(&idkp->dev, "%s", dev_name(&drive->gendev));
398 if (device_register(&idkp->dev))
402 idkp->driver = &ide_gd_driver;
405 g->private_data = &idkp->driver;
407 drive->driver_data = idkp;
408 drive->debug_mask = debug_mask;
409 drive->disk_ops = disk_ops;
411 disk_ops->setup(drive);
413 set_capacity(g, ide_gd_capacity(drive));
415 g->minors = IDE_DISK_MINORS;
416 g->flags |= GENHD_FL_EXT_DEVT;
417 if (drive->dev_flags & IDE_DFLAG_REMOVABLE)
418 g->flags = GENHD_FL_REMOVABLE;
419 g->fops = &ide_gd_ops;
420 g->events = DISK_EVENT_MEDIA_CHANGE;
421 device_add_disk(&drive->gendev, g, NULL);
432 static int __init ide_gd_init(void)
434 printk(KERN_INFO DRV_NAME " driver " IDE_GD_VERSION "\n");
435 return driver_register(&ide_gd_driver.gen_driver);
438 static void __exit ide_gd_exit(void)
440 driver_unregister(&ide_gd_driver.gen_driver);
443 MODULE_ALIAS("ide:*m-disk*");
444 MODULE_ALIAS("ide-disk");
445 MODULE_ALIAS("ide:*m-floppy*");
446 MODULE_ALIAS("ide-floppy");
447 module_init(ide_gd_init);
448 module_exit(ide_gd_exit);
449 MODULE_LICENSE("GPL");
450 MODULE_DESCRIPTION("generic ATA/ATAPI disk driver");