[linux-block.git] / drivers / ide / ide-gd.c

// SPDX-License-Identifier: GPL-2.0-only
#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);
		if (__invalidate_device(bdev, true))
			pr_warn("VFS: busy inodes on changed media %s\n",
				bdev->bd_disk->disk_name);
		drive->disk_ops->get_capacity(drive);
		set_capacity(disk, ide_gd_capacity(drive));
		set_bit(GD_NEED_PART_SCAN, &disk->state);
	} 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 void 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);
}

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 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_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);
}

#ifdef CONFIG_COMPAT
static int ide_gd_compat_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;

	if (!drive->disk_ops->compat_ioctl)
		return -ENOIOCTLCMD;

	return drive->disk_ops->compat_ioctl(drive, bdev, mode, cmd, arg);
}
#endif

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,
#ifdef CONFIG_COMPAT
	.compat_ioctl		= ide_gd_compat_ioctl,
#endif
	.getgeo			= ide_gd_getgeo,
	.unlock_native_capacity	= ide_gd_unlock_native_capacity,
};

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, "%s", 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->flags |= GENHD_FL_EXT_DEVT;
	if (drive->dev_flags & IDE_DFLAG_REMOVABLE)
		g->flags = GENHD_FL_REMOVABLE;
	g->fops = &ide_gd_ops;
	g->events = DISK_EVENT_MEDIA_CHANGE;
	device_add_disk(&drive->gendev, g, NULL);
	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
09c434b8	1	// SPDX-License-Identifier: GPL-2.0-only
5fef0e5c BZ	2	#include <linux/module.h>
	3	#include <linux/types.h>
	4	#include <linux/string.h>
	5	#include <linux/kernel.h>
	6	#include <linux/errno.h>
	7	#include <linux/genhd.h>
	8	#include <linux/mutex.h>
	9	#include <linux/ide.h>
	10	#include <linux/hdreg.h>
b0aedb04	11	#include <linux/dmi.h>
5a0e3ad6	12	#include <linux/slab.h>
5fef0e5c BZ	13
	14	#if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT)
	15	#define IDE_DISK_MINORS (1 << PARTN_BITS)
	16	#else
	17	#define IDE_DISK_MINORS 0
	18	#endif
	19
	20	#include "ide-disk.h"
806f80a6	21	#include "ide-floppy.h"
5fef0e5c BZ	22
	23	#define IDE_GD_VERSION "1.18"
	24
806f80a6	25	/* module parameters */
2a48fc0a	26	static DEFINE_MUTEX(ide_gd_mutex);
806f80a6 BZ	27	static unsigned long debug_mask;
	28	module_param(debug_mask, ulong, 0644);
	29
5fef0e5c BZ	30	static DEFINE_MUTEX(ide_disk_ref_mutex);
5fef0e5c BZ	31
8fed4368	32	static void ide_disk_release(struct device *);
5fef0e5c BZ	33
	34	static struct ide_disk_obj ide_disk_get(struct gendisk disk)
	35	{
	36	struct ide_disk_obj *idkp = NULL;
	37
	38	mutex_lock(&ide_disk_ref_mutex);
	39	idkp = ide_drv_g(disk, ide_disk_obj);
	40	if (idkp) {
	41	if (ide_device_get(idkp->drive))
	42	idkp = NULL;
	43	else
8fed4368	44	get_device(&idkp->dev);
5fef0e5c BZ	45	}
	46	mutex_unlock(&ide_disk_ref_mutex);
	47	return idkp;
	48	}
	49
	50	static void ide_disk_put(struct ide_disk_obj *idkp)
	51	{
	52	ide_drive_t *drive = idkp->drive;
	53
	54	mutex_lock(&ide_disk_ref_mutex);
8fed4368	55	put_device(&idkp->dev);
5fef0e5c BZ	56	ide_device_put(drive);
	57	mutex_unlock(&ide_disk_ref_mutex);
	58	}
	59
	60	sector_t ide_gd_capacity(ide_drive_t *drive)
	61	{
	62	return drive->capacity64;
	63	}
	64
	65	static int ide_gd_probe(ide_drive_t *);
	66
	67	static void ide_gd_remove(ide_drive_t *drive)
	68	{
	69	struct ide_disk_obj *idkp = drive->driver_data;
	70	struct gendisk *g = idkp->disk;
	71
	72	ide_proc_unregister_driver(drive, idkp->driver);
8fed4368	73	device_del(&idkp->dev);
5fef0e5c	74	del_gendisk(g);
806f80a6	75	drive->disk_ops->flush(drive);
5fef0e5c	76
8fed4368 BZ	77	mutex_lock(&ide_disk_ref_mutex);
	78	put_device(&idkp->dev);
	79	mutex_unlock(&ide_disk_ref_mutex);
5fef0e5c BZ	80	}
5fef0e5c BZ	81
8fed4368	82	static void ide_disk_release(struct device *dev)
5fef0e5c	83	{
8fed4368	84	struct ide_disk_obj *idkp = to_ide_drv(dev, ide_disk_obj);
5fef0e5c BZ	85	ide_drive_t *drive = idkp->drive;
	86	struct gendisk *g = idkp->disk;
	87
806f80a6	88	drive->disk_ops = NULL;
5fef0e5c BZ	89	drive->driver_data = NULL;
	90	g->private_data = NULL;
	91	put_disk(g);
	92	kfree(idkp);
	93	}
	94
	95	/*
	96	* On HPA drives the capacity needs to be
421f91d2	97	* reinitialized on resume otherwise the disk
5fef0e5c BZ	98	* can not be used and a hard reset is required
	99	*/
	100	static void ide_gd_resume(ide_drive_t *drive)
	101	{
	102	if (ata_id_hpa_enabled(drive->id))
806f80a6	103	(void)drive->disk_ops->get_capacity(drive);
5fef0e5c BZ	104	}
5fef0e5c BZ	105
b0aedb04 BP	106	static const struct dmi_system_id ide_coldreboot_table[] = {
	107	{
	108	/* Acer TravelMate 66x cuts power during reboot */
	109	.ident = "Acer TravelMate 660",
	110	.matches = {
	111	DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
	112	DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 660"),
	113	},
	114	},
	115
	116	{ } /* terminate list */
	117	};
	118
5fef0e5c BZ	119	static void ide_gd_shutdown(ide_drive_t *drive)
	120	{
	121	#ifdef CONFIG_ALPHA
	122	/* On Alpha, halt(8) doesn't actually turn the machine off,
	123	it puts you into the sort of firmware monitor. Typically,
	124	it's used to boot another kernel image, so it's not much
	125	different from reboot(8). Therefore, we don't need to
	126	spin down the disk in this case, especially since Alpha
	127	firmware doesn't handle disks in standby mode properly.
	128	On the other hand, it's reasonably safe to turn the power
	129	off when the shutdown process reaches the firmware prompt,
	130	as the firmware initialization takes rather long time -
	131	at least 10 seconds, which should be sufficient for
	132	the disk to expire its write cache. */
	133	if (system_state != SYSTEM_POWER_OFF) {
	134	#else
b0aedb04 BP	135	if (system_state == SYSTEM_RESTART &&
b0aedb04 BP	136	!dmi_check_system(ide_coldreboot_table)) {
5fef0e5c	137	#endif
806f80a6	138	drive->disk_ops->flush(drive);
5fef0e5c BZ	139	return;
	140	}
	141
	142	printk(KERN_INFO "Shutdown: %s\n", drive->name);
	143
	144	drive->gendev.bus->suspend(&drive->gendev, PMSG_SUSPEND);
	145	}
	146
79cb3803 BZ	147	#ifdef CONFIG_IDE_PROC_FS
	148	static ide_proc_entry_t ide_disk_proc_entries(ide_drive_t drive)
	149	{
806f80a6	150	return (drive->media == ide_disk) ? ide_disk_proc : ide_floppy_proc;
79cb3803 BZ	151	}
	152
	153	static const struct ide_proc_devset ide_disk_proc_devsets(ide_drive_t drive)
	154	{
806f80a6 BZ	155	return (drive->media == ide_disk) ? ide_disk_settings
806f80a6 BZ	156	: ide_floppy_settings;
79cb3803 BZ	157	}
	158	#endif
	159
806f80a6 BZ	160	static ide_startstop_t ide_gd_do_request(ide_drive_t *drive,
	161	struct request *rq, sector_t sector)
	162	{
	163	return drive->disk_ops->do_request(drive, rq, sector);
	164	}
	165
7f3c868b	166	static struct ide_driver ide_gd_driver = {
5fef0e5c BZ	167	.gen_driver = {
5fef0e5c BZ	168	.owner = THIS_MODULE,
806f80a6	169	.name = "ide-gd",
5fef0e5c BZ	170	.bus = &ide_bus_type,
	171	},
	172	.probe = ide_gd_probe,
	173	.remove = ide_gd_remove,
	174	.resume = ide_gd_resume,
	175	.shutdown = ide_gd_shutdown,
	176	.version = IDE_GD_VERSION,
806f80a6	177	.do_request = ide_gd_do_request,
5fef0e5c	178	#ifdef CONFIG_IDE_PROC_FS
79cb3803 BZ	179	.proc_entries = ide_disk_proc_entries,
79cb3803 BZ	180	.proc_devsets = ide_disk_proc_devsets,
5fef0e5c BZ	181	#endif
	182	};
	183
b2f21e05	184	static int ide_gd_open(struct block_device *bdev, fmode_t mode)
5fef0e5c	185	{
b2f21e05	186	struct gendisk *disk = bdev->bd_disk;
5fef0e5c BZ	187	struct ide_disk_obj *idkp;
5fef0e5c BZ	188	ide_drive_t *drive;
806f80a6	189	int ret = 0;
5fef0e5c BZ	190
	191	idkp = ide_disk_get(disk);
	192	if (idkp == NULL)
	193	return -ENXIO;
	194
	195	drive = idkp->drive;
	196
088b1b88	197	ide_debug_log(IDE_DBG_FUNC, "enter");
806f80a6	198
5fef0e5c BZ	199	idkp->openers++;
	200
	201	if ((drive->dev_flags & IDE_DFLAG_REMOVABLE) && idkp->openers == 1) {
806f80a6 BZ	202	drive->dev_flags &= ~IDE_DFLAG_FORMAT_IN_PROGRESS;
	203	/* Just in case */
	204
	205	ret = drive->disk_ops->init_media(drive, disk);
	206
	207	/*
	208	* Allow O_NDELAY to open a drive without a disk, or with an
	209	* unreadable disk, so that we can get the format capacity
	210	* of the drive or begin the format - Sam
	211	*/
b2f21e05	212	if (ret && (mode & FMODE_NDELAY) == 0) {
806f80a6 BZ	213	ret = -EIO;
	214	goto out_put_idkp;
	215	}
	216
b2f21e05	217	if ((drive->dev_flags & IDE_DFLAG_WP) && (mode & FMODE_WRITE)) {
806f80a6 BZ	218	ret = -EROFS;
	219	goto out_put_idkp;
	220	}
	221
5fef0e5c BZ	222	/*
	223	* Ignore the return code from door_lock,
	224	* since the open() has already succeeded,
	225	* and the door_lock is irrelevant at this point.
	226	*/
806f80a6	227	drive->disk_ops->set_doorlock(drive, disk, 1);
fec2cf60 CH	228	if (__invalidate_device(bdev, true))
	229	pr_warn("VFS: busy inodes on changed media %s\n",
	230	bdev->bd_disk->disk_name);
	231	drive->disk_ops->get_capacity(drive);
	232	set_capacity(disk, ide_gd_capacity(drive));
38430f08	233	set_bit(GD_NEED_PART_SCAN, &disk->state);
806f80a6 BZ	234	} else if (drive->dev_flags & IDE_DFLAG_FORMAT_IN_PROGRESS) {
	235	ret = -EBUSY;
	236	goto out_put_idkp;
5fef0e5c BZ	237	}
5fef0e5c BZ	238	return 0;
806f80a6 BZ	239
	240	out_put_idkp:
	241	idkp->openers--;
	242	ide_disk_put(idkp);
	243	return ret;
5fef0e5c BZ	244	}
5fef0e5c BZ	245
6e9624b8 AB	246	static int ide_gd_unlocked_open(struct block_device *bdev, fmode_t mode)
	247	{
	248	int ret;
	249
2a48fc0a	250	mutex_lock(&ide_gd_mutex);
6e9624b8	251	ret = ide_gd_open(bdev, mode);
2a48fc0a	252	mutex_unlock(&ide_gd_mutex);
6e9624b8 AB	253
	254	return ret;
	255	}
	256
	257
db2a144b	258	static void ide_gd_release(struct gendisk *disk, fmode_t mode)
5fef0e5c	259	{
5fef0e5c BZ	260	struct ide_disk_obj *idkp = ide_drv_g(disk, ide_disk_obj);
	261	ide_drive_t *drive = idkp->drive;
	262
088b1b88	263	ide_debug_log(IDE_DBG_FUNC, "enter");
806f80a6	264
2a48fc0a	265	mutex_lock(&ide_gd_mutex);
5fef0e5c	266	if (idkp->openers == 1)
806f80a6	267	drive->disk_ops->flush(drive);
5fef0e5c	268
806f80a6 BZ	269	if ((drive->dev_flags & IDE_DFLAG_REMOVABLE) && idkp->openers == 1) {
	270	drive->disk_ops->set_doorlock(drive, disk, 0);
	271	drive->dev_flags &= ~IDE_DFLAG_FORMAT_IN_PROGRESS;
	272	}
5fef0e5c BZ	273
	274	idkp->openers--;
	275
	276	ide_disk_put(idkp);
2a48fc0a	277	mutex_unlock(&ide_gd_mutex);
5fef0e5c BZ	278	}
	279
	280	static int ide_gd_getgeo(struct block_device bdev, struct hd_geometry geo)
	281	{
	282	struct ide_disk_obj *idkp = ide_drv_g(bdev->bd_disk, ide_disk_obj);
	283	ide_drive_t *drive = idkp->drive;
	284
	285	geo->heads = drive->bios_head;
	286	geo->sectors = drive->bios_sect;
	287	geo->cylinders = (u16)drive->bios_cyl; /* truncate */
	288	return 0;
	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)
c3e33e04 TH	298	disk_ops->unlock_native_capacity(drive);
e957b60d BZ	299	}
e957b60d BZ	300
b2f21e05	301	static int ide_gd_ioctl(struct block_device *bdev, fmode_t mode,
806f80a6 BZ	302	unsigned int cmd, unsigned long arg)
806f80a6 BZ	303	{
806f80a6 BZ	304	struct ide_disk_obj *idkp = ide_drv_g(bdev->bd_disk, ide_disk_obj);
	305	ide_drive_t *drive = idkp->drive;
	306
b2f21e05	307	return drive->disk_ops->ioctl(drive, bdev, mode, cmd, arg);
806f80a6 BZ	308	}
806f80a6 BZ	309
c103d6ee AB	310	#ifdef CONFIG_COMPAT
	311	static int ide_gd_compat_ioctl(struct block_device *bdev, fmode_t mode,
	312	unsigned int cmd, unsigned long arg)
	313	{
	314	struct ide_disk_obj *idkp = ide_drv_g(bdev->bd_disk, ide_disk_obj);
	315	ide_drive_t *drive = idkp->drive;
	316
	317	if (!drive->disk_ops->compat_ioctl)
	318	return -ENOIOCTLCMD;
	319
	320	return drive->disk_ops->compat_ioctl(drive, bdev, mode, cmd, arg);
	321	}
	322	#endif
	323
83d5cde4	324	static const struct block_device_operations ide_gd_ops = {
5fef0e5c	325	.owner = THIS_MODULE,
6e9624b8	326	.open = ide_gd_unlocked_open,
b2f21e05	327	.release = ide_gd_release,
8a6cfeb6	328	.ioctl = ide_gd_ioctl,
c103d6ee	329	#ifdef CONFIG_COMPAT
03264ddd	330	.compat_ioctl = ide_gd_compat_ioctl,
c103d6ee	331	#endif
5fef0e5c	332	.getgeo = ide_gd_getgeo,
c3e33e04	333	.unlock_native_capacity = ide_gd_unlock_native_capacity,
5fef0e5c BZ	334	};
	335
	336	static int ide_gd_probe(ide_drive_t *drive)
	337	{
806f80a6	338	const struct ide_disk_ops *disk_ops = NULL;
5fef0e5c BZ	339	struct ide_disk_obj *idkp;
	340	struct gendisk *g;
	341
	342	/* strstr("foo", "") is non-NULL */
806f80a6 BZ	343	if (!strstr("ide-gd", drive->driver_req))
	344	goto failed;
	345
	346	#ifdef CONFIG_IDE_GD_ATA
	347	if (drive->media == ide_disk)
	348	disk_ops = &ide_ata_disk_ops;
	349	#endif
	350	#ifdef CONFIG_IDE_GD_ATAPI
	351	if (drive->media == ide_floppy)
	352	disk_ops = &ide_atapi_disk_ops;
	353	#endif
	354	if (disk_ops == NULL)
5fef0e5c BZ	355	goto failed;
5fef0e5c BZ	356
806f80a6 BZ	357	if (disk_ops->check(drive, DRV_NAME) == 0) {
	358	printk(KERN_ERR PFX "%s: not supported by this driver\n",
	359	drive->name);
5fef0e5c	360	goto failed;
806f80a6	361	}
5fef0e5c BZ	362
5fef0e5c BZ	363	idkp = kzalloc(sizeof(*idkp), GFP_KERNEL);
806f80a6 BZ	364	if (!idkp) {
	365	printk(KERN_ERR PFX "%s: can't allocate a disk structure\n",
	366	drive->name);
5fef0e5c	367	goto failed;
806f80a6	368	}
5fef0e5c BZ	369
	370	g = alloc_disk_node(IDE_DISK_MINORS, hwif_to_node(drive->hwif));
	371	if (!g)
	372	goto out_free_idkp;
	373
	374	ide_init_disk(g, drive);
	375
8fed4368 BZ	376	idkp->dev.parent = &drive->gendev;
8fed4368 BZ	377	idkp->dev.release = ide_disk_release;
02aa2a37	378	dev_set_name(&idkp->dev, "%s", dev_name(&drive->gendev));
8fed4368 BZ	379
	380	if (device_register(&idkp->dev))
	381	goto out_free_disk;
5fef0e5c BZ	382
	383	idkp->drive = drive;
	384	idkp->driver = &ide_gd_driver;
	385	idkp->disk = g;
	386
	387	g->private_data = &idkp->driver;
	388
	389	drive->driver_data = idkp;
806f80a6 BZ	390	drive->debug_mask = debug_mask;
806f80a6 BZ	391	drive->disk_ops = disk_ops;
5fef0e5c	392
806f80a6	393	disk_ops->setup(drive);
5fef0e5c BZ	394
	395	set_capacity(g, ide_gd_capacity(drive));
	396
	397	g->minors = IDE_DISK_MINORS;
5fef0e5c BZ	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;
3c12c8e9	402	g->events = DISK_EVENT_MEDIA_CHANGE;
fef912bf	403	device_add_disk(&drive->gendev, g, NULL);
5fef0e5c BZ	404	return 0;
5fef0e5c BZ	405
8fed4368 BZ	406	out_free_disk:
8fed4368 BZ	407	put_disk(g);
5fef0e5c BZ	408	out_free_idkp:
	409	kfree(idkp);
	410	failed:
	411	return -ENODEV;
	412	}
	413
	414	static int __init ide_gd_init(void)
	415	{
806f80a6	416	printk(KERN_INFO DRV_NAME " driver " IDE_GD_VERSION "\n");
5fef0e5c BZ	417	return driver_register(&ide_gd_driver.gen_driver);
	418	}
	419
	420	static void __exit ide_gd_exit(void)
	421	{
	422	driver_unregister(&ide_gd_driver.gen_driver);
	423	}
	424
	425	MODULE_ALIAS("ide:m-disk");
	426	MODULE_ALIAS("ide-disk");
806f80a6 BZ	427	MODULE_ALIAS("ide:m-floppy");
806f80a6 BZ	428	MODULE_ALIAS("ide-floppy");
5fef0e5c BZ	429	module_init(ide_gd_init);
	430	module_exit(ide_gd_exit);
	431	MODULE_LICENSE("GPL");
806f80a6	432	MODULE_DESCRIPTION("generic ATA/ATAPI disk driver");