[deliverable/linux.git] / sound / core / control_compat.c

/*
 * compat ioctls for control API
 *
 *   Copyright (c) by Takashi Iwai <tiwai@suse.de>
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 */

/* this file included from control.c */

#include <linux/compat.h>

struct snd_ctl_elem_list32 {
	u32 offset;
	u32 space;
	u32 used;
	u32 count;
	u32 pids;
	unsigned char reserved[50];
} /* don't set packed attribute here */;

static int snd_ctl_elem_list_compat(struct snd_card *card,
				    struct snd_ctl_elem_list32 __user *data32)
{
	struct snd_ctl_elem_list __user *data;
	compat_caddr_t ptr;
	int err;

	data = compat_alloc_user_space(sizeof(*data));

	/* offset, space, used, count */
	if (copy_in_user(data, data32, 4 * sizeof(u32)))
		return -EFAULT;
	/* pids */
	if (get_user(ptr, &data32->pids) ||
	    put_user(compat_ptr(ptr), &data->pids))
		return -EFAULT;
	err = snd_ctl_elem_list(card, data);
	if (err < 0)
		return err;
	/* copy the result */
	if (copy_in_user(data32, data, 4 * sizeof(u32)))
		return -EFAULT;
	return 0;
}

/*
 * control element info
 * it uses union, so the things are not easy..
 */

struct snd_ctl_elem_info32 {
	struct snd_ctl_elem_id id; // the size of struct is same
	s32 type;
	u32 access;
	u32 count;
	s32 owner;
	union {
		struct {
			s32 min;
			s32 max;
			s32 step;
		} integer;
		struct {
			u64 min;
			u64 max;
			u64 step;
		} integer64;
		struct {
			u32 items;
			u32 item;
			char name[64];
		} enumerated;
		unsigned char reserved[128];
	} value;
	unsigned char reserved[64];
} __attribute__((packed));

static int snd_ctl_elem_info_compat(struct snd_ctl_file *ctl,
				    struct snd_ctl_elem_info32 __user *data32)
{
	struct snd_ctl_elem_info *data;
	int err;

	data = kzalloc(sizeof(*data), GFP_KERNEL);
	if (! data)
		return -ENOMEM;

	err = -EFAULT;
	/* copy id */
	if (copy_from_user(&data->id, &data32->id, sizeof(data->id)))
		goto error;
	/* we need to copy the item index.
	 * hope this doesn't break anything..
	 */
	if (get_user(data->value.enumerated.item, &data32->value.enumerated.item))
		goto error;

	snd_power_lock(ctl->card);
	err = snd_power_wait(ctl->card, SNDRV_CTL_POWER_D0);
	if (err >= 0)
		err = snd_ctl_elem_info(ctl, data);
	snd_power_unlock(ctl->card);

	if (err < 0)
		goto error;
	/* restore info to 32bit */
	err = -EFAULT;
	/* id, type, access, count */
	if (copy_to_user(&data32->id, &data->id, sizeof(data->id)) ||
	    copy_to_user(&data32->type, &data->type, 3 * sizeof(u32)))
		goto error;
	if (put_user(data->owner, &data32->owner))
		goto error;
	switch (data->type) {
	case SNDRV_CTL_ELEM_TYPE_BOOLEAN:
	case SNDRV_CTL_ELEM_TYPE_INTEGER:
		if (put_user(data->value.integer.min, &data32->value.integer.min) ||
		    put_user(data->value.integer.max, &data32->value.integer.max) ||
		    put_user(data->value.integer.step, &data32->value.integer.step))
			goto error;
		break;
	case SNDRV_CTL_ELEM_TYPE_INTEGER64:
		if (copy_to_user(&data32->value.integer64,
				 &data->value.integer64,
				 sizeof(data->value.integer64)))
			goto error;
		break;
	case SNDRV_CTL_ELEM_TYPE_ENUMERATED:
		if (copy_to_user(&data32->value.enumerated,
				 &data->value.enumerated,
				 sizeof(data->value.enumerated)))
			goto error;
		break;
	default:
		break;
	}
	err = 0;
 error:
	kfree(data);
	return err;
}

/* read / write */
struct snd_ctl_elem_value32 {
	struct snd_ctl_elem_id id;
	unsigned int indirect;	/* bit-field causes misalignment */
        union {
		s32 integer[128];
		unsigned char data[512];
#ifndef CONFIG_X86_64
		s64 integer64[64];
#endif
        } value;
        unsigned char reserved[128];
};


/* get the value type and count of the control */
static int get_ctl_type(struct snd_card *card, struct snd_ctl_elem_id *id,
			int *countp)
{
	struct snd_kcontrol *kctl;
	struct snd_ctl_elem_info *info;
	int err;

	down_read(&card->controls_rwsem);
	kctl = snd_ctl_find_id(card, id);
	if (! kctl) {
		up_read(&card->controls_rwsem);
		return -ENXIO;
	}
	info = kzalloc(sizeof(*info), GFP_KERNEL);
	if (info == NULL) {
		up_read(&card->controls_rwsem);
		return -ENOMEM;
	}
	info->id = *id;
	err = kctl->info(kctl, info);
	up_read(&card->controls_rwsem);
	if (err >= 0) {
		err = info->type;
		*countp = info->count;
	}
	kfree(info);
	return err;
}

static int get_elem_size(int type, int count)
{
	switch (type) {
	case SNDRV_CTL_ELEM_TYPE_INTEGER64:
		return sizeof(s64) * count;
	case SNDRV_CTL_ELEM_TYPE_ENUMERATED:
		return sizeof(int) * count;
	case SNDRV_CTL_ELEM_TYPE_BYTES:
		return 512;
	case SNDRV_CTL_ELEM_TYPE_IEC958:
		return sizeof(struct snd_aes_iec958);
	default:
		return -1;
	}
}

static int copy_ctl_value_from_user(struct snd_card *card,
				    struct snd_ctl_elem_value *data,
				    struct snd_ctl_elem_value32 __user *data32,
				    int *typep, int *countp)
{
	int i, type, count, size;
	unsigned int indirect;

	if (copy_from_user(&data->id, &data32->id, sizeof(data->id)))
		return -EFAULT;
	if (get_user(indirect, &data32->indirect))
		return -EFAULT;
	if (indirect)
		return -EINVAL;
	type = get_ctl_type(card, &data->id, &count);
	if (type < 0)
		return type;

	if (type == SNDRV_CTL_ELEM_TYPE_BOOLEAN ||
	    type == SNDRV_CTL_ELEM_TYPE_INTEGER) {
		for (i = 0; i < count; i++) {
			int val;
			if (get_user(val, &data32->value.integer[i]))
				return -EFAULT;
			data->value.integer.value[i] = val;
		}
	} else {
		size = get_elem_size(type, count);
		if (size < 0) {
			printk(KERN_ERR "snd_ioctl32_ctl_elem_value: unknown type %d\n", type);
			return -EINVAL;
		}
		if (copy_from_user(data->value.bytes.data,
				   data32->value.data, size))
			return -EFAULT;
	}

	*typep = type;
	*countp = count;
	return 0;
}

/* restore the value to 32bit */
static int copy_ctl_value_to_user(struct snd_ctl_elem_value32 __user *data32,
				  struct snd_ctl_elem_value *data,
				  int type, int count)
{
	int i, size;

	if (type == SNDRV_CTL_ELEM_TYPE_BOOLEAN ||
	    type == SNDRV_CTL_ELEM_TYPE_INTEGER) {
		for (i = 0; i < count; i++) {
			int val;
			val = data->value.integer.value[i];
			if (put_user(val, &data32->value.integer[i]))
				return -EFAULT;
		}
	} else {
		size = get_elem_size(type, count);
		if (copy_to_user(data32->value.data,
				 data->value.bytes.data, size))
			return -EFAULT;
	}
	return 0;
}

static int snd_ctl_elem_read_user_compat(struct snd_card *card, 
					 struct snd_ctl_elem_value32 __user *data32)
{
	struct snd_ctl_elem_value *data;
	int err, type, count;

	data = kzalloc(sizeof(*data), GFP_KERNEL);
	if (data == NULL)
		return -ENOMEM;

	if ((err = copy_ctl_value_from_user(card, data, data32, &type, &count)) < 0)
		goto error;

	snd_power_lock(card);
	err = snd_power_wait(card, SNDRV_CTL_POWER_D0);
	if (err >= 0)
		err = snd_ctl_elem_read(card, data);
	snd_power_unlock(card);
	if (err >= 0)
		err = copy_ctl_value_to_user(data32, data, type, count);
 error:
	kfree(data);
	return err;
}

static int snd_ctl_elem_write_user_compat(struct snd_ctl_file *file,
					  struct snd_ctl_elem_value32 __user *data32)
{
	struct snd_ctl_elem_value *data;
	struct snd_card *card = file->card;
	int err, type, count;

	data = kzalloc(sizeof(*data), GFP_KERNEL);
	if (data == NULL)
		return -ENOMEM;

	if ((err = copy_ctl_value_from_user(card, data, data32, &type, &count)) < 0)
		goto error;

	snd_power_lock(card);
	err = snd_power_wait(card, SNDRV_CTL_POWER_D0);
	if (err >= 0)
		err = snd_ctl_elem_write(card, file, data);
	snd_power_unlock(card);
	if (err >= 0)
		err = copy_ctl_value_to_user(data32, data, type, count);
 error:
	kfree(data);
	return err;
}

/* add or replace a user control */
static int snd_ctl_elem_add_compat(struct snd_ctl_file *file,
				   struct snd_ctl_elem_info32 __user *data32,
				   int replace)
{
	struct snd_ctl_elem_info *data;
	int err;

	data = kzalloc(sizeof(*data), GFP_KERNEL);
	if (! data)
		return -ENOMEM;

	err = -EFAULT;
	/* id, type, access, count */ \
	if (copy_from_user(&data->id, &data32->id, sizeof(data->id)) ||
	    copy_from_user(&data->type, &data32->type, 3 * sizeof(u32)))
		goto error;
	if (get_user(data->owner, &data32->owner) ||
	    get_user(data->type, &data32->type))
		goto error;
	switch (data->type) {
	case SNDRV_CTL_ELEM_TYPE_BOOLEAN:
	case SNDRV_CTL_ELEM_TYPE_INTEGER:
		if (get_user(data->value.integer.min, &data32->value.integer.min) ||
		    get_user(data->value.integer.max, &data32->value.integer.max) ||
		    get_user(data->value.integer.step, &data32->value.integer.step))
			goto error;
		break;
	case SNDRV_CTL_ELEM_TYPE_INTEGER64:
		if (copy_from_user(&data->value.integer64,
				   &data32->value.integer64,
				   sizeof(data->value.integer64)))
			goto error;
		break;
	case SNDRV_CTL_ELEM_TYPE_ENUMERATED:
		if (copy_from_user(&data->value.enumerated,
				   &data32->value.enumerated,
				   sizeof(data->value.enumerated)))
			goto error;
		break;
	default:
		break;
	}
	err = snd_ctl_elem_add(file, data, replace);
 error:
	kfree(data);
	return err;
}  

enum {
	SNDRV_CTL_IOCTL_ELEM_LIST32 = _IOWR('U', 0x10, struct snd_ctl_elem_list32),
	SNDRV_CTL_IOCTL_ELEM_INFO32 = _IOWR('U', 0x11, struct snd_ctl_elem_info32),
	SNDRV_CTL_IOCTL_ELEM_READ32 = _IOWR('U', 0x12, struct snd_ctl_elem_value32),
	SNDRV_CTL_IOCTL_ELEM_WRITE32 = _IOWR('U', 0x13, struct snd_ctl_elem_value32),
	SNDRV_CTL_IOCTL_ELEM_ADD32 = _IOWR('U', 0x17, struct snd_ctl_elem_info32),
	SNDRV_CTL_IOCTL_ELEM_REPLACE32 = _IOWR('U', 0x18, struct snd_ctl_elem_info32),
};

static inline long snd_ctl_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
{
	struct snd_ctl_file *ctl;
	struct snd_kctl_ioctl *p;
	void __user *argp = compat_ptr(arg);
	int err;

	ctl = file->private_data;
	snd_assert(ctl && ctl->card, return -ENXIO);

	switch (cmd) {
	case SNDRV_CTL_IOCTL_PVERSION:
	case SNDRV_CTL_IOCTL_CARD_INFO:
	case SNDRV_CTL_IOCTL_SUBSCRIBE_EVENTS:
	case SNDRV_CTL_IOCTL_POWER:
	case SNDRV_CTL_IOCTL_POWER_STATE:
	case SNDRV_CTL_IOCTL_ELEM_LOCK:
	case SNDRV_CTL_IOCTL_ELEM_UNLOCK:
	case SNDRV_CTL_IOCTL_ELEM_REMOVE:
	case SNDRV_CTL_IOCTL_TLV_READ:
	case SNDRV_CTL_IOCTL_TLV_WRITE:
	case SNDRV_CTL_IOCTL_TLV_COMMAND:
		return snd_ctl_ioctl(file, cmd, (unsigned long)argp);
	case SNDRV_CTL_IOCTL_ELEM_LIST32:
		return snd_ctl_elem_list_compat(ctl->card, argp);
	case SNDRV_CTL_IOCTL_ELEM_INFO32:
		return snd_ctl_elem_info_compat(ctl, argp);
	case SNDRV_CTL_IOCTL_ELEM_READ32:
		return snd_ctl_elem_read_user_compat(ctl->card, argp);
	case SNDRV_CTL_IOCTL_ELEM_WRITE32:
		return snd_ctl_elem_write_user_compat(ctl, argp);
	case SNDRV_CTL_IOCTL_ELEM_ADD32:
		return snd_ctl_elem_add_compat(ctl, argp, 0);
	case SNDRV_CTL_IOCTL_ELEM_REPLACE32:
		return snd_ctl_elem_add_compat(ctl, argp, 1);
	}

	down_read(&snd_ioctl_rwsem);
	list_for_each_entry(p, &snd_control_compat_ioctls, list) {
		if (p->fioctl) {
			err = p->fioctl(ctl->card, ctl, cmd, arg);
			if (err != -ENOIOCTLCMD) {
				up_read(&snd_ioctl_rwsem);
				return err;
			}
		}
	}
	up_read(&snd_ioctl_rwsem);
	return -ENOIOCTLCMD;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* compat ioctls for control API
	3	*
	4	* Copyright (c) by Takashi Iwai <tiwai@suse.de>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software
	18	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	19	*/
	20
	21	/* this file included from control.c */
	22
	23	#include <linux/compat.h>
	24
82e9bae6	25	struct snd_ctl_elem_list32 {
1da177e4 LT	26	u32 offset;
	27	u32 space;
	28	u32 used;
	29	u32 count;
	30	u32 pids;
	31	unsigned char reserved[50];
	32	} /* don't set packed attribute here */;
	33
82e9bae6 TI	34	static int snd_ctl_elem_list_compat(struct snd_card *card,
82e9bae6 TI	35	struct snd_ctl_elem_list32 __user *data32)
1da177e4	36	{
82e9bae6	37	struct snd_ctl_elem_list __user *data;
1da177e4 LT	38	compat_caddr_t ptr;
	39	int err;
	40
	41	data = compat_alloc_user_space(sizeof(*data));
	42
	43	/* offset, space, used, count */
	44	if (copy_in_user(data, data32, 4 * sizeof(u32)))
	45	return -EFAULT;
	46	/* pids */
	47	if (get_user(ptr, &data32->pids) \|\|
	48	put_user(compat_ptr(ptr), &data->pids))
	49	return -EFAULT;
	50	err = snd_ctl_elem_list(card, data);
	51	if (err < 0)
	52	return err;
	53	/* copy the result */
	54	if (copy_in_user(data32, data, 4 * sizeof(u32)))
	55	return -EFAULT;
	56	return 0;
	57	}
	58
	59	/*
	60	* control element info
	61	* it uses union, so the things are not easy..
	62	*/
	63
82e9bae6 TI	64	struct snd_ctl_elem_info32 {
82e9bae6 TI	65	struct snd_ctl_elem_id id; // the size of struct is same
1da177e4 LT	66	s32 type;
	67	u32 access;
	68	u32 count;
	69	s32 owner;
	70	union {
	71	struct {
	72	s32 min;
	73	s32 max;
	74	s32 step;
	75	} integer;
	76	struct {
	77	u64 min;
	78	u64 max;
	79	u64 step;
	80	} integer64;
	81	struct {
	82	u32 items;
	83	u32 item;
	84	char name[64];
	85	} enumerated;
	86	unsigned char reserved[128];
	87	} value;
	88	unsigned char reserved[64];
	89	} __attribute__((packed));
	90
82e9bae6 TI	91	static int snd_ctl_elem_info_compat(struct snd_ctl_file *ctl,
82e9bae6 TI	92	struct snd_ctl_elem_info32 __user *data32)
1da177e4	93	{
82e9bae6	94	struct snd_ctl_elem_info *data;
1da177e4 LT	95	int err;
1da177e4 LT	96
ca2c0966	97	data = kzalloc(sizeof(*data), GFP_KERNEL);
1da177e4 LT	98	if (! data)
	99	return -ENOMEM;
	100
	101	err = -EFAULT;
	102	/* copy id */
	103	if (copy_from_user(&data->id, &data32->id, sizeof(data->id)))
	104	goto error;
	105	/* we need to copy the item index.
	106	* hope this doesn't break anything..
	107	*/
	108	if (get_user(data->value.enumerated.item, &data32->value.enumerated.item))
	109	goto error;
64649400 GP	110
64649400 GP	111	snd_power_lock(ctl->card);
cbac4b0c	112	err = snd_power_wait(ctl->card, SNDRV_CTL_POWER_D0);
64649400 GP	113	if (err >= 0)
	114	err = snd_ctl_elem_info(ctl, data);
	115	snd_power_unlock(ctl->card);
	116
1da177e4 LT	117	if (err < 0)
	118	goto error;
	119	/* restore info to 32bit */
	120	err = -EFAULT;
	121	/* id, type, access, count */
	122	if (copy_to_user(&data32->id, &data->id, sizeof(data->id)) \|\|
	123	copy_to_user(&data32->type, &data->type, 3 * sizeof(u32)))
	124	goto error;
	125	if (put_user(data->owner, &data32->owner))
	126	goto error;
	127	switch (data->type) {
	128	case SNDRV_CTL_ELEM_TYPE_BOOLEAN:
	129	case SNDRV_CTL_ELEM_TYPE_INTEGER:
	130	if (put_user(data->value.integer.min, &data32->value.integer.min) \|\|
	131	put_user(data->value.integer.max, &data32->value.integer.max) \|\|
	132	put_user(data->value.integer.step, &data32->value.integer.step))
	133	goto error;
	134	break;
	135	case SNDRV_CTL_ELEM_TYPE_INTEGER64:
	136	if (copy_to_user(&data32->value.integer64,
	137	&data->value.integer64,
	138	sizeof(data->value.integer64)))
	139	goto error;
	140	break;
	141	case SNDRV_CTL_ELEM_TYPE_ENUMERATED:
	142	if (copy_to_user(&data32->value.enumerated,
	143	&data->value.enumerated,
	144	sizeof(data->value.enumerated)))
	145	goto error;
	146	break;
	147	default:
	148	break;
	149	}
	150	err = 0;
	151	error:
	152	kfree(data);
	153	return err;
	154	}
	155
	156	/* read / write */
82e9bae6 TI	157	struct snd_ctl_elem_value32 {
82e9bae6 TI	158	struct snd_ctl_elem_id id;
1da177e4 LT	159	unsigned int indirect; /* bit-field causes misalignment */
	160	union {
	161	s32 integer[128];
	162	unsigned char data[512];
	163	#ifndef CONFIG_X86_64
	164	s64 integer64[64];
	165	#endif
	166	} value;
	167	unsigned char reserved[128];
	168	};
	169
	170
	171	/* get the value type and count of the control */
82e9bae6 TI	172	static int get_ctl_type(struct snd_card card, struct snd_ctl_elem_id id,
82e9bae6 TI	173	int *countp)
1da177e4	174	{
82e9bae6	175	struct snd_kcontrol *kctl;
aa657ca9	176	struct snd_ctl_elem_info *info;
1da177e4 LT	177	int err;
	178
	179	down_read(&card->controls_rwsem);
	180	kctl = snd_ctl_find_id(card, id);
	181	if (! kctl) {
	182	up_read(&card->controls_rwsem);
	183	return -ENXIO;
	184	}
aa657ca9 JK	185	info = kzalloc(sizeof(*info), GFP_KERNEL);
	186	if (info == NULL) {
	187	up_read(&card->controls_rwsem);
	188	return -ENOMEM;
	189	}
	190	info->id = *id;
	191	err = kctl->info(kctl, info);
1da177e4 LT	192	up_read(&card->controls_rwsem);
1da177e4 LT	193	if (err >= 0) {
aa657ca9 JK	194	err = info->type;
aa657ca9 JK	195	*countp = info->count;
1da177e4	196	}
aa657ca9	197	kfree(info);
1da177e4 LT	198	return err;
	199	}
	200
	201	static int get_elem_size(int type, int count)
	202	{
	203	switch (type) {
	204	case SNDRV_CTL_ELEM_TYPE_INTEGER64:
	205	return sizeof(s64) * count;
	206	case SNDRV_CTL_ELEM_TYPE_ENUMERATED:
	207	return sizeof(int) * count;
	208	case SNDRV_CTL_ELEM_TYPE_BYTES:
	209	return 512;
	210	case SNDRV_CTL_ELEM_TYPE_IEC958:
82e9bae6	211	return sizeof(struct snd_aes_iec958);
1da177e4 LT	212	default:
	213	return -1;
	214	}
	215	}
	216
82e9bae6 TI	217	static int copy_ctl_value_from_user(struct snd_card *card,
	218	struct snd_ctl_elem_value *data,
	219	struct snd_ctl_elem_value32 __user *data32,
1da177e4 LT	220	int typep, int countp)
	221	{
	222	int i, type, count, size;
	223	unsigned int indirect;
	224
	225	if (copy_from_user(&data->id, &data32->id, sizeof(data->id)))
	226	return -EFAULT;
	227	if (get_user(indirect, &data32->indirect))
	228	return -EFAULT;
	229	if (indirect)
	230	return -EINVAL;
	231	type = get_ctl_type(card, &data->id, &count);
	232	if (type < 0)
	233	return type;
	234
	235	if (type == SNDRV_CTL_ELEM_TYPE_BOOLEAN \|\|
	236	type == SNDRV_CTL_ELEM_TYPE_INTEGER) {
	237	for (i = 0; i < count; i++) {
	238	int val;
	239	if (get_user(val, &data32->value.integer[i]))
	240	return -EFAULT;
	241	data->value.integer.value[i] = val;
	242	}
	243	} else {
	244	size = get_elem_size(type, count);
	245	if (size < 0) {
	246	printk(KERN_ERR "snd_ioctl32_ctl_elem_value: unknown type %d\n", type);
	247	return -EINVAL;
	248	}
	249	if (copy_from_user(data->value.bytes.data,
	250	data32->value.data, size))
	251	return -EFAULT;
	252	}
	253
	254	*typep = type;
	255	*countp = count;
	256	return 0;
	257	}
	258
	259	/* restore the value to 32bit */
82e9bae6 TI	260	static int copy_ctl_value_to_user(struct snd_ctl_elem_value32 __user *data32,
82e9bae6 TI	261	struct snd_ctl_elem_value *data,
1da177e4 LT	262	int type, int count)
	263	{
	264	int i, size;
	265
	266	if (type == SNDRV_CTL_ELEM_TYPE_BOOLEAN \|\|
	267	type == SNDRV_CTL_ELEM_TYPE_INTEGER) {
	268	for (i = 0; i < count; i++) {
	269	int val;
	270	val = data->value.integer.value[i];
	271	if (put_user(val, &data32->value.integer[i]))
	272	return -EFAULT;
	273	}
	274	} else {
	275	size = get_elem_size(type, count);
	276	if (copy_to_user(data32->value.data,
	277	data->value.bytes.data, size))
	278	return -EFAULT;
	279	}
	280	return 0;
	281	}
	282
82e9bae6 TI	283	static int snd_ctl_elem_read_user_compat(struct snd_card *card,
82e9bae6 TI	284	struct snd_ctl_elem_value32 __user *data32)
1da177e4	285	{
82e9bae6	286	struct snd_ctl_elem_value *data;
1da177e4 LT	287	int err, type, count;
1da177e4 LT	288
ca2c0966	289	data = kzalloc(sizeof(*data), GFP_KERNEL);
1da177e4 LT	290	if (data == NULL)
	291	return -ENOMEM;
	292
	293	if ((err = copy_ctl_value_from_user(card, data, data32, &type, &count)) < 0)
	294	goto error;
64649400 GP	295
64649400 GP	296	snd_power_lock(card);
cbac4b0c	297	err = snd_power_wait(card, SNDRV_CTL_POWER_D0);
64649400 GP	298	if (err >= 0)
	299	err = snd_ctl_elem_read(card, data);
	300	snd_power_unlock(card);
	301	if (err >= 0)
	302	err = copy_ctl_value_to_user(data32, data, type, count);
1da177e4 LT	303	error:
	304	kfree(data);
	305	return err;
	306	}
	307
82e9bae6 TI	308	static int snd_ctl_elem_write_user_compat(struct snd_ctl_file *file,
82e9bae6 TI	309	struct snd_ctl_elem_value32 __user *data32)
1da177e4	310	{
82e9bae6	311	struct snd_ctl_elem_value *data;
64649400	312	struct snd_card *card = file->card;
1da177e4 LT	313	int err, type, count;
1da177e4 LT	314
ca2c0966	315	data = kzalloc(sizeof(*data), GFP_KERNEL);
1da177e4 LT	316	if (data == NULL)
	317	return -ENOMEM;
	318
64649400	319	if ((err = copy_ctl_value_from_user(card, data, data32, &type, &count)) < 0)
1da177e4	320	goto error;
64649400 GP	321
64649400 GP	322	snd_power_lock(card);
cbac4b0c	323	err = snd_power_wait(card, SNDRV_CTL_POWER_D0);
64649400 GP	324	if (err >= 0)
	325	err = snd_ctl_elem_write(card, file, data);
	326	snd_power_unlock(card);
	327	if (err >= 0)
	328	err = copy_ctl_value_to_user(data32, data, type, count);
1da177e4 LT	329	error:
	330	kfree(data);
	331	return err;
	332	}
	333
	334	/* add or replace a user control */
82e9bae6 TI	335	static int snd_ctl_elem_add_compat(struct snd_ctl_file *file,
82e9bae6 TI	336	struct snd_ctl_elem_info32 __user *data32,
1da177e4 LT	337	int replace)
1da177e4 LT	338	{
82e9bae6	339	struct snd_ctl_elem_info *data;
1da177e4 LT	340	int err;
1da177e4 LT	341
ca2c0966	342	data = kzalloc(sizeof(*data), GFP_KERNEL);
1da177e4 LT	343	if (! data)
	344	return -ENOMEM;
	345
	346	err = -EFAULT;
	347	/* id, type, access, count */ \
	348	if (copy_from_user(&data->id, &data32->id, sizeof(data->id)) \|\|
	349	copy_from_user(&data->type, &data32->type, 3 * sizeof(u32)))
	350	goto error;
	351	if (get_user(data->owner, &data32->owner) \|\|
	352	get_user(data->type, &data32->type))
	353	goto error;
	354	switch (data->type) {
	355	case SNDRV_CTL_ELEM_TYPE_BOOLEAN:
	356	case SNDRV_CTL_ELEM_TYPE_INTEGER:
	357	if (get_user(data->value.integer.min, &data32->value.integer.min) \|\|
	358	get_user(data->value.integer.max, &data32->value.integer.max) \|\|
	359	get_user(data->value.integer.step, &data32->value.integer.step))
	360	goto error;
	361	break;
	362	case SNDRV_CTL_ELEM_TYPE_INTEGER64:
	363	if (copy_from_user(&data->value.integer64,
	364	&data32->value.integer64,
	365	sizeof(data->value.integer64)))
	366	goto error;
	367	break;
	368	case SNDRV_CTL_ELEM_TYPE_ENUMERATED:
	369	if (copy_from_user(&data->value.enumerated,
	370	&data32->value.enumerated,
	371	sizeof(data->value.enumerated)))
	372	goto error;
	373	break;
	374	default:
	375	break;
	376	}
	377	err = snd_ctl_elem_add(file, data, replace);
	378	error:
	379	kfree(data);
	380	return err;
	381	}
	382
	383	enum {
82e9bae6 TI	384	SNDRV_CTL_IOCTL_ELEM_LIST32 = _IOWR('U', 0x10, struct snd_ctl_elem_list32),
	385	SNDRV_CTL_IOCTL_ELEM_INFO32 = _IOWR('U', 0x11, struct snd_ctl_elem_info32),
	386	SNDRV_CTL_IOCTL_ELEM_READ32 = _IOWR('U', 0x12, struct snd_ctl_elem_value32),
	387	SNDRV_CTL_IOCTL_ELEM_WRITE32 = _IOWR('U', 0x13, struct snd_ctl_elem_value32),
	388	SNDRV_CTL_IOCTL_ELEM_ADD32 = _IOWR('U', 0x17, struct snd_ctl_elem_info32),
	389	SNDRV_CTL_IOCTL_ELEM_REPLACE32 = _IOWR('U', 0x18, struct snd_ctl_elem_info32),
1da177e4 LT	390	};
	391
	392	static inline long snd_ctl_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
	393	{
82e9bae6	394	struct snd_ctl_file *ctl;
9244b2c3	395	struct snd_kctl_ioctl *p;
1da177e4 LT	396	void __user *argp = compat_ptr(arg);
	397	int err;
	398
	399	ctl = file->private_data;
	400	snd_assert(ctl && ctl->card, return -ENXIO);
	401
	402	switch (cmd) {
	403	case SNDRV_CTL_IOCTL_PVERSION:
	404	case SNDRV_CTL_IOCTL_CARD_INFO:
	405	case SNDRV_CTL_IOCTL_SUBSCRIBE_EVENTS:
	406	case SNDRV_CTL_IOCTL_POWER:
	407	case SNDRV_CTL_IOCTL_POWER_STATE:
	408	case SNDRV_CTL_IOCTL_ELEM_LOCK:
	409	case SNDRV_CTL_IOCTL_ELEM_UNLOCK:
2b1181ed TI	410	case SNDRV_CTL_IOCTL_ELEM_REMOVE:
	411	case SNDRV_CTL_IOCTL_TLV_READ:
	412	case SNDRV_CTL_IOCTL_TLV_WRITE:
	413	case SNDRV_CTL_IOCTL_TLV_COMMAND:
1da177e4 LT	414	return snd_ctl_ioctl(file, cmd, (unsigned long)argp);
	415	case SNDRV_CTL_IOCTL_ELEM_LIST32:
	416	return snd_ctl_elem_list_compat(ctl->card, argp);
	417	case SNDRV_CTL_IOCTL_ELEM_INFO32:
	418	return snd_ctl_elem_info_compat(ctl, argp);
	419	case SNDRV_CTL_IOCTL_ELEM_READ32:
	420	return snd_ctl_elem_read_user_compat(ctl->card, argp);
	421	case SNDRV_CTL_IOCTL_ELEM_WRITE32:
	422	return snd_ctl_elem_write_user_compat(ctl, argp);
	423	case SNDRV_CTL_IOCTL_ELEM_ADD32:
	424	return snd_ctl_elem_add_compat(ctl, argp, 0);
	425	case SNDRV_CTL_IOCTL_ELEM_REPLACE32:
	426	return snd_ctl_elem_add_compat(ctl, argp, 1);
	427	}
	428
	429	down_read(&snd_ioctl_rwsem);
9244b2c3	430	list_for_each_entry(p, &snd_control_compat_ioctls, list) {
1da177e4 LT	431	if (p->fioctl) {
	432	err = p->fioctl(ctl->card, ctl, cmd, arg);
	433	if (err != -ENOIOCTLCMD) {
	434	up_read(&snd_ioctl_rwsem);
	435	return err;
	436	}
	437	}
	438	}
	439	up_read(&snd_ioctl_rwsem);
	440	return -ENOIOCTLCMD;
	441	}