[people/arne_f/kernel.git] / sound / core / timer_compat.c

/*
 *   32bit -> 64bit ioctl wrapper for timer 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 timer.c */

#include <linux/compat.h>

/*
 * ILP32/LP64 has different size for 'long' type. Additionally, the size
 * of storage alignment differs depending on architectures. Here, '__packed'
 * qualifier is used so that the size of this structure is multiple of 4 and
 * it fits to any architectures with 32 bit storage alignment.
 */
struct snd_timer_gparams32 {
	struct snd_timer_id tid;
	u32 period_num;
	u32 period_den;
	unsigned char reserved[32];
} __packed;

struct snd_timer_info32 {
	u32 flags;
	s32 card;
	unsigned char id[64];
	unsigned char name[80];
	u32 reserved0;
	u32 resolution;
	unsigned char reserved[64];
};

static int snd_timer_user_gparams_compat(struct file *file,
					struct snd_timer_gparams32 __user *user)
{
	struct snd_timer_gparams gparams;

	if (copy_from_user(&gparams.tid, &user->tid, sizeof(gparams.tid)) ||
	    get_user(gparams.period_num, &user->period_num) ||
	    get_user(gparams.period_den, &user->period_den))
		return -EFAULT;

	return timer_set_gparams(&gparams);
}

static int snd_timer_user_info_compat(struct file *file,
				      struct snd_timer_info32 __user *_info)
{
	struct snd_timer_user *tu;
	struct snd_timer_info32 info;
	struct snd_timer *t;

	tu = file->private_data;
	if (!tu->timeri)
		return -EBADFD;
	t = tu->timeri->timer;
	if (!t)
		return -EBADFD;
	memset(&info, 0, sizeof(info));
	info.card = t->card ? t->card->number : -1;
	if (t->hw.flags & SNDRV_TIMER_HW_SLAVE)
		info.flags |= SNDRV_TIMER_FLG_SLAVE;
	strlcpy(info.id, t->id, sizeof(info.id));
	strlcpy(info.name, t->name, sizeof(info.name));
	info.resolution = t->hw.resolution;
	if (copy_to_user(_info, &info, sizeof(*_info)))
		return -EFAULT;
	return 0;
}

struct snd_timer_status32 {
	struct compat_timespec tstamp;
	u32 resolution;
	u32 lost;
	u32 overrun;
	u32 queue;
	unsigned char reserved[64];
};

static int snd_timer_user_status_compat(struct file *file,
					struct snd_timer_status32 __user *_status)
{
	struct snd_timer_user *tu;
	struct snd_timer_status32 status;
	
	tu = file->private_data;
	if (!tu->timeri)
		return -EBADFD;
	memset(&status, 0, sizeof(status));
	status.tstamp.tv_sec = tu->tstamp.tv_sec;
	status.tstamp.tv_nsec = tu->tstamp.tv_nsec;
	status.resolution = snd_timer_resolution(tu->timeri);
	status.lost = tu->timeri->lost;
	status.overrun = tu->overrun;
	spin_lock_irq(&tu->qlock);
	status.queue = tu->qused;
	spin_unlock_irq(&tu->qlock);
	if (copy_to_user(_status, &status, sizeof(status)))
		return -EFAULT;
	return 0;
}

#ifdef CONFIG_X86_X32
/* X32 ABI has the same struct as x86-64 */
#define snd_timer_user_status_x32(file, s) \
	snd_timer_user_status(file, s)
#endif /* CONFIG_X86_X32 */

/*
 */

enum {
	SNDRV_TIMER_IOCTL_GPARAMS32 = _IOW('T', 0x04, struct snd_timer_gparams32),
	SNDRV_TIMER_IOCTL_INFO32 = _IOR('T', 0x11, struct snd_timer_info32),
	SNDRV_TIMER_IOCTL_STATUS32 = _IOW('T', 0x14, struct snd_timer_status32),
#ifdef CONFIG_X86_X32
	SNDRV_TIMER_IOCTL_STATUS_X32 = _IOW('T', 0x14, struct snd_timer_status),
#endif /* CONFIG_X86_X32 */
};

static long __snd_timer_user_ioctl_compat(struct file *file, unsigned int cmd,
					  unsigned long arg)
{
	void __user *argp = compat_ptr(arg);

	switch (cmd) {
	case SNDRV_TIMER_IOCTL_PVERSION:
	case SNDRV_TIMER_IOCTL_TREAD:
	case SNDRV_TIMER_IOCTL_GINFO:
	case SNDRV_TIMER_IOCTL_GSTATUS:
	case SNDRV_TIMER_IOCTL_SELECT:
	case SNDRV_TIMER_IOCTL_PARAMS:
	case SNDRV_TIMER_IOCTL_START:
	case SNDRV_TIMER_IOCTL_START_OLD:
	case SNDRV_TIMER_IOCTL_STOP:
	case SNDRV_TIMER_IOCTL_STOP_OLD:
	case SNDRV_TIMER_IOCTL_CONTINUE:
	case SNDRV_TIMER_IOCTL_CONTINUE_OLD:
	case SNDRV_TIMER_IOCTL_PAUSE:
	case SNDRV_TIMER_IOCTL_PAUSE_OLD:
	case SNDRV_TIMER_IOCTL_NEXT_DEVICE:
		return __snd_timer_user_ioctl(file, cmd, (unsigned long)argp);
	case SNDRV_TIMER_IOCTL_GPARAMS32:
		return snd_timer_user_gparams_compat(file, argp);
	case SNDRV_TIMER_IOCTL_INFO32:
		return snd_timer_user_info_compat(file, argp);
	case SNDRV_TIMER_IOCTL_STATUS32:
		return snd_timer_user_status_compat(file, argp);
#ifdef CONFIG_X86_X32
	case SNDRV_TIMER_IOCTL_STATUS_X32:
		return snd_timer_user_status_x32(file, argp);
#endif /* CONFIG_X86_X32 */
	}
	return -ENOIOCTLCMD;
}

static long snd_timer_user_ioctl_compat(struct file *file, unsigned int cmd,
					unsigned long arg)
{
	struct snd_timer_user *tu = file->private_data;
	long ret;

	mutex_lock(&tu->ioctl_lock);
	ret = __snd_timer_user_ioctl_compat(file, cmd, arg);
	mutex_unlock(&tu->ioctl_lock);
	return ret;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* 32bit -> 64bit ioctl wrapper for timer API
	3	* Copyright (c) by Takashi Iwai <tiwai@suse.de>
	4	*
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License as published by
	7	* the Free Software Foundation; either version 2 of the License, or
	8	* (at your option) any later version.
	9	*
	10	* This program is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU General Public License
	16	* along with this program; if not, write to the Free Software
	17	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	18	*
	19	*/
	20
	21	/* This file included from timer.c */
	22
	23	#include <linux/compat.h>
	24
91d2178e TS	25	/*
	26	* ILP32/LP64 has different size for 'long' type. Additionally, the size
	27	* of storage alignment differs depending on architectures. Here, '__packed'
	28	* qualifier is used so that the size of this structure is multiple of 4 and
	29	* it fits to any architectures with 32 bit storage alignment.
	30	*/
	31	struct snd_timer_gparams32 {
	32	struct snd_timer_id tid;
	33	u32 period_num;
	34	u32 period_den;
	35	unsigned char reserved[32];
	36	} __packed;
	37
53d2f744	38	struct snd_timer_info32 {
1da177e4 LT	39	u32 flags;
	40	s32 card;
	41	unsigned char id[64];
	42	unsigned char name[80];
	43	u32 reserved0;
	44	u32 resolution;
	45	unsigned char reserved[64];
	46	};
	47
91d2178e TS	48	static int snd_timer_user_gparams_compat(struct file *file,
	49	struct snd_timer_gparams32 __user *user)
	50	{
	51	struct snd_timer_gparams gparams;
	52
	53	if (copy_from_user(&gparams.tid, &user->tid, sizeof(gparams.tid)) \|\|
	54	get_user(gparams.period_num, &user->period_num) \|\|
	55	get_user(gparams.period_den, &user->period_den))
	56	return -EFAULT;
	57
	58	return timer_set_gparams(&gparams);
	59	}
	60
1da177e4	61	static int snd_timer_user_info_compat(struct file *file,
53d2f744	62	struct snd_timer_info32 __user *_info)
1da177e4	63	{
53d2f744 TI	64	struct snd_timer_user *tu;
	65	struct snd_timer_info32 info;
	66	struct snd_timer *t;
1da177e4 LT	67
1da177e4 LT	68	tu = file->private_data;
6352ec90 TI	69	if (!tu->timeri)
6352ec90 TI	70	return -EBADFD;
1da177e4	71	t = tu->timeri->timer;
6352ec90 TI	72	if (!t)
6352ec90 TI	73	return -EBADFD;
1da177e4 LT	74	memset(&info, 0, sizeof(info));
	75	info.card = t->card ? t->card->number : -1;
	76	if (t->hw.flags & SNDRV_TIMER_HW_SLAVE)
	77	info.flags \|= SNDRV_TIMER_FLG_SLAVE;
	78	strlcpy(info.id, t->id, sizeof(info.id));
	79	strlcpy(info.name, t->name, sizeof(info.name));
	80	info.resolution = t->hw.resolution;
	81	if (copy_to_user(_info, &info, sizeof(*_info)))
	82	return -EFAULT;
	83	return 0;
	84	}
	85
53d2f744	86	struct snd_timer_status32 {
1da177e4 LT	87	struct compat_timespec tstamp;
	88	u32 resolution;
	89	u32 lost;
	90	u32 overrun;
	91	u32 queue;
	92	unsigned char reserved[64];
	93	};
	94
	95	static int snd_timer_user_status_compat(struct file *file,
53d2f744	96	struct snd_timer_status32 __user *_status)
1da177e4	97	{
53d2f744	98	struct snd_timer_user *tu;
3a72494a	99	struct snd_timer_status32 status;
1da177e4 LT	100
1da177e4 LT	101	tu = file->private_data;
6352ec90 TI	102	if (!tu->timeri)
6352ec90 TI	103	return -EBADFD;
1da177e4	104	memset(&status, 0, sizeof(status));
3a72494a TI	105	status.tstamp.tv_sec = tu->tstamp.tv_sec;
3a72494a TI	106	status.tstamp.tv_nsec = tu->tstamp.tv_nsec;
1da177e4 LT	107	status.resolution = snd_timer_resolution(tu->timeri);
	108	status.lost = tu->timeri->lost;
	109	status.overrun = tu->overrun;
	110	spin_lock_irq(&tu->qlock);
	111	status.queue = tu->qused;
	112	spin_unlock_irq(&tu->qlock);
	113	if (copy_to_user(_status, &status, sizeof(status)))
	114	return -EFAULT;
	115	return 0;
	116	}
	117
b24e7ad1 TI	118	#ifdef CONFIG_X86_X32
	119	/* X32 ABI has the same struct as x86-64 */
	120	#define snd_timer_user_status_x32(file, s) \
	121	snd_timer_user_status(file, s)
	122	#endif /* CONFIG_X86_X32 */
	123
1da177e4 LT	124	/*
	125	*/
	126
	127	enum {
91d2178e	128	SNDRV_TIMER_IOCTL_GPARAMS32 = _IOW('T', 0x04, struct snd_timer_gparams32),
53d2f744 TI	129	SNDRV_TIMER_IOCTL_INFO32 = _IOR('T', 0x11, struct snd_timer_info32),
53d2f744 TI	130	SNDRV_TIMER_IOCTL_STATUS32 = _IOW('T', 0x14, struct snd_timer_status32),
b24e7ad1 TI	131	#ifdef CONFIG_X86_X32
	132	SNDRV_TIMER_IOCTL_STATUS_X32 = _IOW('T', 0x14, struct snd_timer_status),
	133	#endif /* CONFIG_X86_X32 */
1da177e4 LT	134	};
1da177e4 LT	135
79fb0518 TI	136	static long __snd_timer_user_ioctl_compat(struct file *file, unsigned int cmd,
79fb0518 TI	137	unsigned long arg)
1da177e4 LT	138	{
	139	void __user *argp = compat_ptr(arg);
	140
	141	switch (cmd) {
	142	case SNDRV_TIMER_IOCTL_PVERSION:
	143	case SNDRV_TIMER_IOCTL_TREAD:
	144	case SNDRV_TIMER_IOCTL_GINFO:
1da177e4 LT	145	case SNDRV_TIMER_IOCTL_GSTATUS:
	146	case SNDRV_TIMER_IOCTL_SELECT:
	147	case SNDRV_TIMER_IOCTL_PARAMS:
	148	case SNDRV_TIMER_IOCTL_START:
8c50b37c	149	case SNDRV_TIMER_IOCTL_START_OLD:
1da177e4	150	case SNDRV_TIMER_IOCTL_STOP:
8c50b37c	151	case SNDRV_TIMER_IOCTL_STOP_OLD:
1da177e4	152	case SNDRV_TIMER_IOCTL_CONTINUE:
8c50b37c	153	case SNDRV_TIMER_IOCTL_CONTINUE_OLD:
15790a6b	154	case SNDRV_TIMER_IOCTL_PAUSE:
8c50b37c	155	case SNDRV_TIMER_IOCTL_PAUSE_OLD:
1da177e4	156	case SNDRV_TIMER_IOCTL_NEXT_DEVICE:
79fb0518	157	return __snd_timer_user_ioctl(file, cmd, (unsigned long)argp);
91d2178e TS	158	case SNDRV_TIMER_IOCTL_GPARAMS32:
91d2178e TS	159	return snd_timer_user_gparams_compat(file, argp);
1da177e4 LT	160	case SNDRV_TIMER_IOCTL_INFO32:
	161	return snd_timer_user_info_compat(file, argp);
	162	case SNDRV_TIMER_IOCTL_STATUS32:
	163	return snd_timer_user_status_compat(file, argp);
b24e7ad1 TI	164	#ifdef CONFIG_X86_X32
	165	case SNDRV_TIMER_IOCTL_STATUS_X32:
	166	return snd_timer_user_status_x32(file, argp);
	167	#endif /* CONFIG_X86_X32 */
1da177e4 LT	168	}
	169	return -ENOIOCTLCMD;
	170	}
79fb0518 TI	171
	172	static long snd_timer_user_ioctl_compat(struct file *file, unsigned int cmd,
	173	unsigned long arg)
	174	{
	175	struct snd_timer_user *tu = file->private_data;
	176	long ret;
	177
	178	mutex_lock(&tu->ioctl_lock);
	179	ret = __snd_timer_user_ioctl_compat(file, cmd, arg);
	180	mutex_unlock(&tu->ioctl_lock);
	181	return ret;
	182	}