[GitHub/mt8127/android_kernel_alcatel_ttab.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>
#include <linux/dmi.h>
#include <linux/slab.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 DEFINE_MUTEX(ide_gd_mutex);
static unsigned long debug_mask;
module_param(debug_mask, ulong, 0644);

static DEFINE_MUTEX(ide_disk_ref_mutex);

static void ide_disk_release(struct device *);

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
			get_device(&idkp->dev);
	}
	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);
	put_device(&idkp->dev);
	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);
	device_del(&idkp->dev);
	del_gendisk(g);
	drive->disk_ops->flush(drive);

	mutex_lock(&ide_disk_ref_mutex);
	put_device(&idkp->dev);
	mutex_unlock(&ide_disk_ref_mutex);
}

static void ide_disk_release(struct device *dev)
{
	struct ide_disk_obj *idkp = to_ide_drv(dev, 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
 * reinitialized 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 const struct dmi_system_id ide_coldreboot_table[] = {
	{
		/* Acer TravelMate 66x cuts power during reboot */
		.ident   = "Acer TravelMate 660",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
			DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 660"),
		},
	},

	{ }	/* terminate list */
};

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 &&
		!dmi_check_system(ide_coldreboot_table)) {
#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 struct ide_driver 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,
#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, "enter");

	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_unlocked_open(struct block_device *bdev, fmode_t mode)
{
	int ret;

	mutex_lock(&ide_gd_mutex);
	ret = ide_gd_open(bdev, mode);
	mutex_unlock(&ide_gd_mutex);

	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, "enter");

	mutex_lock(&ide_gd_mutex);
	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);
	mutex_unlock(&ide_gd_mutex);

	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 unsigned int ide_gd_check_events(struct gendisk *disk,
					unsigned int clearing)
{
	struct ide_disk_obj *idkp = ide_drv_g(disk, ide_disk_obj);
	ide_drive_t *drive = idkp->drive;
	bool 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;
	}

	/*
	 * The following is used to force revalidation on the first open on
	 * removeable devices, and never gets reported to userland as
	 * genhd->events is 0.  This is intended as removeable ide disk
	 * can't really detect MEDIA_CHANGE events.
	 */
	ret = drive->dev_flags & IDE_DFLAG_MEDIA_CHANGED;
	drive->dev_flags &= ~IDE_DFLAG_MEDIA_CHANGED;

	return ret ? DISK_EVENT_MEDIA_CHANGE : 0;
}

static void ide_gd_unlock_native_capacity(struct gendisk *disk)
{
	struct ide_disk_obj *idkp = ide_drv_g(disk, ide_disk_obj);
	ide_drive_t *drive = idkp->drive;
	const struct ide_disk_ops *disk_ops = drive->disk_ops;

	if (disk_ops->unlock_native_capacity)
		disk_ops->unlock_native_capacity(drive);
}

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

	if (ide_gd_check_events(disk, 0))
		drive->disk_ops->get_capacity(drive);

	set_capacity(disk, ide_gd_capacity(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 const struct block_device_operations ide_gd_ops = {
	.owner			= THIS_MODULE,
	.open			= ide_gd_unlocked_open,
	.release		= ide_gd_release,
	.ioctl			= ide_gd_ioctl,
	.getgeo			= ide_gd_getgeo,
	.check_events		= ide_gd_check_events,
	.unlock_native_capacity	= ide_gd_unlock_native_capacity,
	.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);

	idkp->dev.parent = &drive->gendev;
	idkp->dev.release = ide_disk_release;
	dev_set_name(&idkp->dev, dev_name(&drive->gendev));

	if (device_register(&idkp->dev))
		goto out_free_disk;

	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_disk:
	put_disk(g);
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>
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	24	/* module parameters */
2a48fc0a	25	static DEFINE_MUTEX(ide_gd_mutex);
806f80a6 BZ	26	static unsigned long debug_mask;
	27	module_param(debug_mask, ulong, 0644);
	28
5fef0e5c BZ	29	static DEFINE_MUTEX(ide_disk_ref_mutex);
5fef0e5c BZ	30
8fed4368	31	static void ide_disk_release(struct device *);
5fef0e5c BZ	32
	33	static struct ide_disk_obj ide_disk_get(struct gendisk disk)
	34	{
	35	struct ide_disk_obj *idkp = NULL;
	36
	37	mutex_lock(&ide_disk_ref_mutex);
	38	idkp = ide_drv_g(disk, ide_disk_obj);
	39	if (idkp) {
	40	if (ide_device_get(idkp->drive))
	41	idkp = NULL;
	42	else
8fed4368	43	get_device(&idkp->dev);
5fef0e5c BZ	44	}
	45	mutex_unlock(&ide_disk_ref_mutex);
	46	return idkp;
	47	}
	48
	49	static void ide_disk_put(struct ide_disk_obj *idkp)
	50	{
	51	ide_drive_t *drive = idkp->drive;
	52
	53	mutex_lock(&ide_disk_ref_mutex);
8fed4368	54	put_device(&idkp->dev);
5fef0e5c BZ	55	ide_device_put(drive);
	56	mutex_unlock(&ide_disk_ref_mutex);
	57	}
	58
	59	sector_t ide_gd_capacity(ide_drive_t *drive)
	60	{
	61	return drive->capacity64;
	62	}
	63
	64	static int ide_gd_probe(ide_drive_t *);
	65
	66	static void ide_gd_remove(ide_drive_t *drive)
	67	{
	68	struct ide_disk_obj *idkp = drive->driver_data;
	69	struct gendisk *g = idkp->disk;
	70
	71	ide_proc_unregister_driver(drive, idkp->driver);
8fed4368	72	device_del(&idkp->dev);
5fef0e5c	73	del_gendisk(g);
806f80a6	74	drive->disk_ops->flush(drive);
5fef0e5c	75
8fed4368 BZ	76	mutex_lock(&ide_disk_ref_mutex);
	77	put_device(&idkp->dev);
	78	mutex_unlock(&ide_disk_ref_mutex);
5fef0e5c BZ	79	}
5fef0e5c BZ	80
8fed4368	81	static void ide_disk_release(struct device *dev)
5fef0e5c	82	{
8fed4368	83	struct ide_disk_obj *idkp = to_ide_drv(dev, ide_disk_obj);
5fef0e5c BZ	84	ide_drive_t *drive = idkp->drive;
	85	struct gendisk *g = idkp->disk;
	86
806f80a6	87	drive->disk_ops = NULL;
5fef0e5c BZ	88	drive->driver_data = NULL;
	89	g->private_data = NULL;
	90	put_disk(g);
	91	kfree(idkp);
	92	}
	93
	94	/*
	95	* On HPA drives the capacity needs to be
421f91d2	96	* reinitialized on resume otherwise the disk
5fef0e5c BZ	97	* can not be used and a hard reset is required
	98	*/
	99	static void ide_gd_resume(ide_drive_t *drive)
	100	{
	101	if (ata_id_hpa_enabled(drive->id))
806f80a6	102	(void)drive->disk_ops->get_capacity(drive);
5fef0e5c BZ	103	}
5fef0e5c BZ	104
b0aedb04 BP	105	static const struct dmi_system_id ide_coldreboot_table[] = {
	106	{
	107	/* Acer TravelMate 66x cuts power during reboot */
	108	.ident = "Acer TravelMate 660",
	109	.matches = {
	110	DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
	111	DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 660"),
	112	},
	113	},
	114
	115	{ } /* terminate list */
	116	};
	117
5fef0e5c BZ	118	static void ide_gd_shutdown(ide_drive_t *drive)
	119	{
	120	#ifdef CONFIG_ALPHA
	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) {
	133	#else
b0aedb04 BP	134	if (system_state == SYSTEM_RESTART &&
b0aedb04 BP	135	!dmi_check_system(ide_coldreboot_table)) {
5fef0e5c	136	#endif
806f80a6	137	drive->disk_ops->flush(drive);
5fef0e5c BZ	138	return;
	139	}
	140
	141	printk(KERN_INFO "Shutdown: %s\n", drive->name);
	142
	143	drive->gendev.bus->suspend(&drive->gendev, PMSG_SUSPEND);
	144	}
	145
79cb3803 BZ	146	#ifdef CONFIG_IDE_PROC_FS
	147	static ide_proc_entry_t ide_disk_proc_entries(ide_drive_t drive)
	148	{
806f80a6	149	return (drive->media == ide_disk) ? ide_disk_proc : ide_floppy_proc;
79cb3803 BZ	150	}
	151
	152	static const struct ide_proc_devset ide_disk_proc_devsets(ide_drive_t drive)
	153	{
806f80a6 BZ	154	return (drive->media == ide_disk) ? ide_disk_settings
806f80a6 BZ	155	: ide_floppy_settings;
79cb3803 BZ	156	}
	157	#endif
	158
806f80a6 BZ	159	static ide_startstop_t ide_gd_do_request(ide_drive_t *drive,
	160	struct request *rq, sector_t sector)
	161	{
	162	return drive->disk_ops->do_request(drive, rq, sector);
	163	}
	164
7f3c868b	165	static struct ide_driver ide_gd_driver = {
5fef0e5c BZ	166	.gen_driver = {
5fef0e5c BZ	167	.owner = THIS_MODULE,
806f80a6	168	.name = "ide-gd",
5fef0e5c BZ	169	.bus = &ide_bus_type,
	170	},
	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,
806f80a6	176	.do_request = ide_gd_do_request,
5fef0e5c	177	#ifdef CONFIG_IDE_PROC_FS
79cb3803 BZ	178	.proc_entries = ide_disk_proc_entries,
79cb3803 BZ	179	.proc_devsets = ide_disk_proc_devsets,
5fef0e5c BZ	180	#endif
	181	};
	182
b2f21e05	183	static int ide_gd_open(struct block_device *bdev, fmode_t mode)
5fef0e5c	184	{
b2f21e05	185	struct gendisk *disk = bdev->bd_disk;
5fef0e5c BZ	186	struct ide_disk_obj *idkp;
5fef0e5c BZ	187	ide_drive_t *drive;
806f80a6	188	int ret = 0;
5fef0e5c BZ	189
	190	idkp = ide_disk_get(disk);
	191	if (idkp == NULL)
	192	return -ENXIO;
	193
	194	drive = idkp->drive;
	195
088b1b88	196	ide_debug_log(IDE_DBG_FUNC, "enter");
806f80a6	197
5fef0e5c BZ	198	idkp->openers++;
	199
	200	if ((drive->dev_flags & IDE_DFLAG_REMOVABLE) && idkp->openers == 1) {
806f80a6 BZ	201	drive->dev_flags &= ~IDE_DFLAG_FORMAT_IN_PROGRESS;
	202	/* Just in case */
	203
	204	ret = drive->disk_ops->init_media(drive, disk);
	205
	206	/*
	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
	210	*/
b2f21e05	211	if (ret && (mode & FMODE_NDELAY) == 0) {
806f80a6 BZ	212	ret = -EIO;
	213	goto out_put_idkp;
	214	}
	215
b2f21e05	216	if ((drive->dev_flags & IDE_DFLAG_WP) && (mode & FMODE_WRITE)) {
806f80a6 BZ	217	ret = -EROFS;
	218	goto out_put_idkp;
	219	}
	220
5fef0e5c BZ	221	/*
	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.
	225	*/
806f80a6	226	drive->disk_ops->set_doorlock(drive, disk, 1);
cedd120c	227	drive->dev_flags \|= IDE_DFLAG_MEDIA_CHANGED;
b2f21e05	228	check_disk_change(bdev);
806f80a6 BZ	229	} else if (drive->dev_flags & IDE_DFLAG_FORMAT_IN_PROGRESS) {
	230	ret = -EBUSY;
	231	goto out_put_idkp;
5fef0e5c BZ	232	}
5fef0e5c BZ	233	return 0;
806f80a6 BZ	234
	235	out_put_idkp:
	236	idkp->openers--;
	237	ide_disk_put(idkp);
	238	return ret;
5fef0e5c BZ	239	}
5fef0e5c BZ	240
6e9624b8 AB	241	static int ide_gd_unlocked_open(struct block_device *bdev, fmode_t mode)
	242	{
	243	int ret;
	244
2a48fc0a	245	mutex_lock(&ide_gd_mutex);
6e9624b8	246	ret = ide_gd_open(bdev, mode);
2a48fc0a	247	mutex_unlock(&ide_gd_mutex);
6e9624b8 AB	248
	249	return ret;
	250	}
	251
	252
b2f21e05	253	static int ide_gd_release(struct gendisk *disk, fmode_t mode)
5fef0e5c	254	{
5fef0e5c BZ	255	struct ide_disk_obj *idkp = ide_drv_g(disk, ide_disk_obj);
	256	ide_drive_t *drive = idkp->drive;
	257
088b1b88	258	ide_debug_log(IDE_DBG_FUNC, "enter");
806f80a6	259
2a48fc0a	260	mutex_lock(&ide_gd_mutex);
5fef0e5c	261	if (idkp->openers == 1)
806f80a6	262	drive->disk_ops->flush(drive);
5fef0e5c	263
806f80a6 BZ	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;
	267	}
5fef0e5c BZ	268
	269	idkp->openers--;
	270
	271	ide_disk_put(idkp);
2a48fc0a	272	mutex_unlock(&ide_gd_mutex);
5fef0e5c BZ	273
	274	return 0;
	275	}
	276
	277	static int ide_gd_getgeo(struct block_device bdev, struct hd_geometry geo)
	278	{
	279	struct ide_disk_obj *idkp = ide_drv_g(bdev->bd_disk, ide_disk_obj);
	280	ide_drive_t *drive = idkp->drive;
	281
	282	geo->heads = drive->bios_head;
	283	geo->sectors = drive->bios_sect;
	284	geo->cylinders = (u16)drive->bios_cyl; /* truncate */
	285	return 0;
	286	}
	287
5b03a1b1 TH	288	static unsigned int ide_gd_check_events(struct gendisk *disk,
5b03a1b1 TH	289	unsigned int clearing)
5fef0e5c BZ	290	{
	291	struct ide_disk_obj *idkp = ide_drv_g(disk, ide_disk_obj);
	292	ide_drive_t *drive = idkp->drive;
5b03a1b1	293	bool ret;
5fef0e5c BZ	294
	295	/* do not scan partitions twice if this is a removable device */
	296	if (drive->dev_flags & IDE_DFLAG_ATTACH) {
	297	drive->dev_flags &= ~IDE_DFLAG_ATTACH;
	298	return 0;
	299	}
	300
7eec77a1 TH	301	/*
	302	* The following is used to force revalidation on the first open on
	303	* removeable devices, and never gets reported to userland as
	304	* genhd->events is 0. This is intended as removeable ide disk
	305	* can't really detect MEDIA_CHANGE events.
	306	*/
5b03a1b1	307	ret = drive->dev_flags & IDE_DFLAG_MEDIA_CHANGED;
cedd120c BZ	308	drive->dev_flags &= ~IDE_DFLAG_MEDIA_CHANGED;
cedd120c BZ	309
5b03a1b1	310	return ret ? DISK_EVENT_MEDIA_CHANGE : 0;
5fef0e5c BZ	311	}
5fef0e5c BZ	312
c3e33e04	313	static void ide_gd_unlock_native_capacity(struct gendisk *disk)
e957b60d BZ	314	{
	315	struct ide_disk_obj *idkp = ide_drv_g(disk, ide_disk_obj);
	316	ide_drive_t *drive = idkp->drive;
	317	const struct ide_disk_ops *disk_ops = drive->disk_ops;
	318
c3e33e04 TH	319	if (disk_ops->unlock_native_capacity)
c3e33e04 TH	320	disk_ops->unlock_native_capacity(drive);
e957b60d BZ	321	}
e957b60d BZ	322
5fef0e5c BZ	323	static int ide_gd_revalidate_disk(struct gendisk *disk)
	324	{
	325	struct ide_disk_obj *idkp = ide_drv_g(disk, ide_disk_obj);
52ebb438 BP	326	ide_drive_t *drive = idkp->drive;
52ebb438 BP	327
5b03a1b1	328	if (ide_gd_check_events(disk, 0))
52ebb438 BP	329	drive->disk_ops->get_capacity(drive);
	330
	331	set_capacity(disk, ide_gd_capacity(drive));
5fef0e5c BZ	332	return 0;
	333	}
	334
b2f21e05	335	static int ide_gd_ioctl(struct block_device *bdev, fmode_t mode,
806f80a6 BZ	336	unsigned int cmd, unsigned long arg)
806f80a6 BZ	337	{
806f80a6 BZ	338	struct ide_disk_obj *idkp = ide_drv_g(bdev->bd_disk, ide_disk_obj);
	339	ide_drive_t *drive = idkp->drive;
	340
b2f21e05	341	return drive->disk_ops->ioctl(drive, bdev, mode, cmd, arg);
806f80a6 BZ	342	}
806f80a6 BZ	343
83d5cde4	344	static const struct block_device_operations ide_gd_ops = {
5fef0e5c	345	.owner = THIS_MODULE,
6e9624b8	346	.open = ide_gd_unlocked_open,
b2f21e05	347	.release = ide_gd_release,
8a6cfeb6	348	.ioctl = ide_gd_ioctl,
5fef0e5c	349	.getgeo = ide_gd_getgeo,
5b03a1b1	350	.check_events = ide_gd_check_events,
c3e33e04	351	.unlock_native_capacity = ide_gd_unlock_native_capacity,
5fef0e5c BZ	352	.revalidate_disk = ide_gd_revalidate_disk
	353	};
	354
	355	static int ide_gd_probe(ide_drive_t *drive)
	356	{
806f80a6	357	const struct ide_disk_ops *disk_ops = NULL;
5fef0e5c BZ	358	struct ide_disk_obj *idkp;
	359	struct gendisk *g;
	360
	361	/* strstr("foo", "") is non-NULL */
806f80a6 BZ	362	if (!strstr("ide-gd", drive->driver_req))
	363	goto failed;
	364
	365	#ifdef CONFIG_IDE_GD_ATA
	366	if (drive->media == ide_disk)
	367	disk_ops = &ide_ata_disk_ops;
	368	#endif
	369	#ifdef CONFIG_IDE_GD_ATAPI
	370	if (drive->media == ide_floppy)
	371	disk_ops = &ide_atapi_disk_ops;
	372	#endif
	373	if (disk_ops == NULL)
5fef0e5c BZ	374	goto failed;
5fef0e5c BZ	375
806f80a6 BZ	376	if (disk_ops->check(drive, DRV_NAME) == 0) {
	377	printk(KERN_ERR PFX "%s: not supported by this driver\n",
	378	drive->name);
5fef0e5c	379	goto failed;
806f80a6	380	}
5fef0e5c BZ	381
5fef0e5c BZ	382	idkp = kzalloc(sizeof(*idkp), GFP_KERNEL);
806f80a6 BZ	383	if (!idkp) {
	384	printk(KERN_ERR PFX "%s: can't allocate a disk structure\n",
	385	drive->name);
5fef0e5c	386	goto failed;
806f80a6	387	}
5fef0e5c BZ	388
	389	g = alloc_disk_node(IDE_DISK_MINORS, hwif_to_node(drive->hwif));
	390	if (!g)
	391	goto out_free_idkp;
	392
	393	ide_init_disk(g, drive);
	394
8fed4368 BZ	395	idkp->dev.parent = &drive->gendev;
	396	idkp->dev.release = ide_disk_release;
	397	dev_set_name(&idkp->dev, dev_name(&drive->gendev));
	398
	399	if (device_register(&idkp->dev))
	400	goto out_free_disk;
5fef0e5c BZ	401
	402	idkp->drive = drive;
	403	idkp->driver = &ide_gd_driver;
	404	idkp->disk = g;
	405
	406	g->private_data = &idkp->driver;
	407
	408	drive->driver_data = idkp;
806f80a6 BZ	409	drive->debug_mask = debug_mask;
806f80a6 BZ	410	drive->disk_ops = disk_ops;
5fef0e5c	411
806f80a6	412	disk_ops->setup(drive);
5fef0e5c BZ	413
	414	set_capacity(g, ide_gd_capacity(drive));
	415
	416	g->minors = IDE_DISK_MINORS;
	417	g->driverfs_dev = &drive->gendev;
	418	g->flags \|= GENHD_FL_EXT_DEVT;
	419	if (drive->dev_flags & IDE_DFLAG_REMOVABLE)
	420	g->flags = GENHD_FL_REMOVABLE;
	421	g->fops = &ide_gd_ops;
	422	add_disk(g);
	423	return 0;
	424
8fed4368 BZ	425	out_free_disk:
8fed4368 BZ	426	put_disk(g);
5fef0e5c BZ	427	out_free_idkp:
	428	kfree(idkp);
	429	failed:
	430	return -ENODEV;
	431	}
	432
	433	static int __init ide_gd_init(void)
	434	{
806f80a6	435	printk(KERN_INFO DRV_NAME " driver " IDE_GD_VERSION "\n");
5fef0e5c BZ	436	return driver_register(&ide_gd_driver.gen_driver);
	437	}
	438
	439	static void __exit ide_gd_exit(void)
	440	{
	441	driver_unregister(&ide_gd_driver.gen_driver);
	442	}
	443
	444	MODULE_ALIAS("ide:m-disk");
	445	MODULE_ALIAS("ide-disk");
806f80a6 BZ	446	MODULE_ALIAS("ide:m-floppy");
806f80a6 BZ	447	MODULE_ALIAS("ide-floppy");
5fef0e5c BZ	448	module_init(ide_gd_init);
	449	module_exit(ide_gd_exit);
	450	MODULE_LICENSE("GPL");
806f80a6	451	MODULE_DESCRIPTION("generic ATA/ATAPI disk driver");