[mirror_ubuntu-kernels.git] / drivers / ide / ide-gd.c

#include <linux/module.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/genhd.h>
#include <linux/mutex.h>
#include <linux/ide.h>
#include <linux/hdreg.h>

#if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT)
#define IDE_DISK_MINORS		(1 << PARTN_BITS)
#else
#define IDE_DISK_MINORS		0
#endif

#include "ide-disk.h"
#include "ide-floppy.h"

#define IDE_GD_VERSION	"1.18"

/* module parameters */
static unsigned long debug_mask;
module_param(debug_mask, ulong, 0644);

static DEFINE_MUTEX(ide_disk_ref_mutex);

static void ide_disk_release(struct kref *);

static struct ide_disk_obj *ide_disk_get(struct gendisk *disk)
{
	struct ide_disk_obj *idkp = NULL;

	mutex_lock(&ide_disk_ref_mutex);
	idkp = ide_drv_g(disk, ide_disk_obj);
	if (idkp) {
		if (ide_device_get(idkp->drive))
			idkp = NULL;
		else
			kref_get(&idkp->kref);
	}
	mutex_unlock(&ide_disk_ref_mutex);
	return idkp;
}

static void ide_disk_put(struct ide_disk_obj *idkp)
{
	ide_drive_t *drive = idkp->drive;

	mutex_lock(&ide_disk_ref_mutex);
	kref_put(&idkp->kref, ide_disk_release);
	ide_device_put(drive);
	mutex_unlock(&ide_disk_ref_mutex);
}

sector_t ide_gd_capacity(ide_drive_t *drive)
{
	return drive->capacity64;
}

static int ide_gd_probe(ide_drive_t *);

static void ide_gd_remove(ide_drive_t *drive)
{
	struct ide_disk_obj *idkp = drive->driver_data;
	struct gendisk *g = idkp->disk;

	ide_proc_unregister_driver(drive, idkp->driver);

	del_gendisk(g);

	drive->disk_ops->flush(drive);

	ide_disk_put(idkp);
}

static void ide_disk_release(struct kref *kref)
{
	struct ide_disk_obj *idkp = to_ide_drv(kref, ide_disk_obj);
	ide_drive_t *drive = idkp->drive;
	struct gendisk *g = idkp->disk;

	drive->disk_ops = NULL;
	drive->driver_data = NULL;
	g->private_data = NULL;
	put_disk(g);
	kfree(idkp);
}

/*
 * On HPA drives the capacity needs to be
 * reinitilized on resume otherwise the disk
 * can not be used and a hard reset is required
 */
static void ide_gd_resume(ide_drive_t *drive)
{
	if (ata_id_hpa_enabled(drive->id))
		(void)drive->disk_ops->get_capacity(drive);
}

static void ide_gd_shutdown(ide_drive_t *drive)
{
#ifdef	CONFIG_ALPHA
	/* On Alpha, halt(8) doesn't actually turn the machine off,
	   it puts you into the sort of firmware monitor. Typically,
	   it's used to boot another kernel image, so it's not much
	   different from reboot(8). Therefore, we don't need to
	   spin down the disk in this case, especially since Alpha
	   firmware doesn't handle disks in standby mode properly.
	   On the other hand, it's reasonably safe to turn the power
	   off when the shutdown process reaches the firmware prompt,
	   as the firmware initialization takes rather long time -
	   at least 10 seconds, which should be sufficient for
	   the disk to expire its write cache. */
	if (system_state != SYSTEM_POWER_OFF) {
#else
	if (system_state == SYSTEM_RESTART) {
#endif
		drive->disk_ops->flush(drive);
		return;
	}

	printk(KERN_INFO "Shutdown: %s\n", drive->name);

	drive->gendev.bus->suspend(&drive->gendev, PMSG_SUSPEND);
}

#ifdef CONFIG_IDE_PROC_FS
static ide_proc_entry_t *ide_disk_proc_entries(ide_drive_t *drive)
{
	return (drive->media == ide_disk) ? ide_disk_proc : ide_floppy_proc;
}

static const struct ide_proc_devset *ide_disk_proc_devsets(ide_drive_t *drive)
{
	return (drive->media == ide_disk) ? ide_disk_settings
					  : ide_floppy_settings;
}
#endif

static ide_startstop_t ide_gd_do_request(ide_drive_t *drive,
					 struct request *rq, sector_t sector)
{
	return drive->disk_ops->do_request(drive, rq, sector);
}

static int ide_gd_end_request(ide_drive_t *drive, int uptodate, int nrsecs)
{
	return drive->disk_ops->end_request(drive, uptodate, nrsecs);
}

static ide_driver_t ide_gd_driver = {
	.gen_driver = {
		.owner		= THIS_MODULE,
		.name		= "ide-gd",
		.bus		= &ide_bus_type,
	},
	.probe			= ide_gd_probe,
	.remove			= ide_gd_remove,
	.resume			= ide_gd_resume,
	.shutdown		= ide_gd_shutdown,
	.version		= IDE_GD_VERSION,
	.do_request		= ide_gd_do_request,
	.end_request		= ide_gd_end_request,
	.error			= __ide_error,
#ifdef CONFIG_IDE_PROC_FS
	.proc_entries		= ide_disk_proc_entries,
	.proc_devsets		= ide_disk_proc_devsets,
#endif
};

static int ide_gd_open(struct block_device *bdev, fmode_t mode)
{
	struct gendisk *disk = bdev->bd_disk;
	struct ide_disk_obj *idkp;
	ide_drive_t *drive;
	int ret = 0;

	idkp = ide_disk_get(disk);
	if (idkp == NULL)
		return -ENXIO;

	drive = idkp->drive;

	ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);

	idkp->openers++;

	if ((drive->dev_flags & IDE_DFLAG_REMOVABLE) && idkp->openers == 1) {
		drive->dev_flags &= ~IDE_DFLAG_FORMAT_IN_PROGRESS;
		/* Just in case */

		ret = drive->disk_ops->init_media(drive, disk);

		/*
		 * Allow O_NDELAY to open a drive without a disk, or with an
		 * unreadable disk, so that we can get the format capacity
		 * of the drive or begin the format - Sam
		 */
		if (ret && (mode & FMODE_NDELAY) == 0) {
			ret = -EIO;
			goto out_put_idkp;
		}

		if ((drive->dev_flags & IDE_DFLAG_WP) && (mode & FMODE_WRITE)) {
			ret = -EROFS;
			goto out_put_idkp;
		}

		/*
		 * Ignore the return code from door_lock,
		 * since the open() has already succeeded,
		 * and the door_lock is irrelevant at this point.
		 */
		drive->disk_ops->set_doorlock(drive, disk, 1);
		drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
		check_disk_change(bdev);
	} else if (drive->dev_flags & IDE_DFLAG_FORMAT_IN_PROGRESS) {
		ret = -EBUSY;
		goto out_put_idkp;
	}
	return 0;

out_put_idkp:
	idkp->openers--;
	ide_disk_put(idkp);
	return ret;
}

static int ide_gd_release(struct gendisk *disk, fmode_t mode)
{
	struct ide_disk_obj *idkp = ide_drv_g(disk, ide_disk_obj);
	ide_drive_t *drive = idkp->drive;

	ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);

	if (idkp->openers == 1)
		drive->disk_ops->flush(drive);

	if ((drive->dev_flags & IDE_DFLAG_REMOVABLE) && idkp->openers == 1) {
		drive->disk_ops->set_doorlock(drive, disk, 0);
		drive->dev_flags &= ~IDE_DFLAG_FORMAT_IN_PROGRESS;
	}

	idkp->openers--;

	ide_disk_put(idkp);

	return 0;
}

static int ide_gd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
{
	struct ide_disk_obj *idkp = ide_drv_g(bdev->bd_disk, ide_disk_obj);
	ide_drive_t *drive = idkp->drive;

	geo->heads = drive->bios_head;
	geo->sectors = drive->bios_sect;
	geo->cylinders = (u16)drive->bios_cyl; /* truncate */
	return 0;
}

static int ide_gd_media_changed(struct gendisk *disk)
{
	struct ide_disk_obj *idkp = ide_drv_g(disk, ide_disk_obj);
	ide_drive_t *drive = idkp->drive;
	int ret;

	/* do not scan partitions twice if this is a removable device */
	if (drive->dev_flags & IDE_DFLAG_ATTACH) {
		drive->dev_flags &= ~IDE_DFLAG_ATTACH;
		return 0;
	}

	ret = !!(drive->dev_flags & IDE_DFLAG_MEDIA_CHANGED);
	drive->dev_flags &= ~IDE_DFLAG_MEDIA_CHANGED;

	return ret;
}

static int ide_gd_revalidate_disk(struct gendisk *disk)
{
	struct ide_disk_obj *idkp = ide_drv_g(disk, ide_disk_obj);
	set_capacity(disk, ide_gd_capacity(idkp->drive));
	return 0;
}

static int ide_gd_ioctl(struct block_device *bdev, fmode_t mode,
			     unsigned int cmd, unsigned long arg)
{
	struct ide_disk_obj *idkp = ide_drv_g(bdev->bd_disk, ide_disk_obj);
	ide_drive_t *drive = idkp->drive;

	return drive->disk_ops->ioctl(drive, bdev, mode, cmd, arg);
}

static struct block_device_operations ide_gd_ops = {
	.owner			= THIS_MODULE,
	.open			= ide_gd_open,
	.release		= ide_gd_release,
	.locked_ioctl		= ide_gd_ioctl,
	.getgeo			= ide_gd_getgeo,
	.media_changed		= ide_gd_media_changed,
	.revalidate_disk	= ide_gd_revalidate_disk
};

static int ide_gd_probe(ide_drive_t *drive)
{
	const struct ide_disk_ops *disk_ops = NULL;
	struct ide_disk_obj *idkp;
	struct gendisk *g;

	/* strstr("foo", "") is non-NULL */
	if (!strstr("ide-gd", drive->driver_req))
		goto failed;

#ifdef CONFIG_IDE_GD_ATA
	if (drive->media == ide_disk)
		disk_ops = &ide_ata_disk_ops;
#endif
#ifdef CONFIG_IDE_GD_ATAPI
	if (drive->media == ide_floppy)
		disk_ops = &ide_atapi_disk_ops;
#endif
	if (disk_ops == NULL)
		goto failed;

	if (disk_ops->check(drive, DRV_NAME) == 0) {
		printk(KERN_ERR PFX "%s: not supported by this driver\n",
			drive->name);
		goto failed;
	}

	idkp = kzalloc(sizeof(*idkp), GFP_KERNEL);
	if (!idkp) {
		printk(KERN_ERR PFX "%s: can't allocate a disk structure\n",
			drive->name);
		goto failed;
	}

	g = alloc_disk_node(IDE_DISK_MINORS, hwif_to_node(drive->hwif));
	if (!g)
		goto out_free_idkp;

	ide_init_disk(g, drive);

	kref_init(&idkp->kref);

	idkp->drive = drive;
	idkp->driver = &ide_gd_driver;
	idkp->disk = g;

	g->private_data = &idkp->driver;

	drive->driver_data = idkp;
	drive->debug_mask = debug_mask;
	drive->disk_ops = disk_ops;

	disk_ops->setup(drive);

	set_capacity(g, ide_gd_capacity(drive));

	g->minors = IDE_DISK_MINORS;
	g->driverfs_dev = &drive->gendev;
	g->flags |= GENHD_FL_EXT_DEVT;
	if (drive->dev_flags & IDE_DFLAG_REMOVABLE)
		g->flags = GENHD_FL_REMOVABLE;
	g->fops = &ide_gd_ops;
	add_disk(g);
	return 0;

out_free_idkp:
	kfree(idkp);
failed:
	return -ENODEV;
}

static int __init ide_gd_init(void)
{
	printk(KERN_INFO DRV_NAME " driver " IDE_GD_VERSION "\n");
	return driver_register(&ide_gd_driver.gen_driver);
}

static void __exit ide_gd_exit(void)
{
	driver_unregister(&ide_gd_driver.gen_driver);
}

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