[linux-2.6-block.git] / sound / core / pcm_compat.c

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

#include <linux/compat.h>

static int snd_pcm_ioctl_delay_compat(struct snd_pcm_substream *substream,
				      s32 __user *src)
{
	snd_pcm_sframes_t delay;
	mm_segment_t fs;
	int err;

	fs = snd_enter_user();
	err = snd_pcm_delay(substream, &delay);
	snd_leave_user(fs);
	if (err < 0)
		return err;
	if (put_user(delay, src))
		return -EFAULT;
	return err;
}

static int snd_pcm_ioctl_rewind_compat(struct snd_pcm_substream *substream,
				       u32 __user *src)
{
	snd_pcm_uframes_t frames;
	int err;

	if (get_user(frames, src))
		return -EFAULT;
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
		err = snd_pcm_playback_rewind(substream, frames);
	else
		err = snd_pcm_capture_rewind(substream, frames);
	if (put_user(err, src))
		return -EFAULT;
	return err < 0 ? err : 0;
}

static int snd_pcm_ioctl_forward_compat(struct snd_pcm_substream *substream,
				       u32 __user *src)
{
	snd_pcm_uframes_t frames;
	int err;

	if (get_user(frames, src))
		return -EFAULT;
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
		err = snd_pcm_playback_forward(substream, frames);
	else
		err = snd_pcm_capture_forward(substream, frames);
	if (put_user(err, src))
		return -EFAULT;
	return err < 0 ? err : 0;
}

struct snd_pcm_hw_params32 {
	u32 flags;
	struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - SNDRV_PCM_HW_PARAM_FIRST_MASK + 1]; /* this must be identical */
	struct snd_mask mres[5];	/* reserved masks */
	struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
	struct snd_interval ires[9];	/* reserved intervals */
	u32 rmask;
	u32 cmask;
	u32 info;
	u32 msbits;
	u32 rate_num;
	u32 rate_den;
	u32 fifo_size;
	unsigned char reserved[64];
};

struct snd_pcm_sw_params32 {
	s32 tstamp_mode;
	u32 period_step;
	u32 sleep_min;
	u32 avail_min;
	u32 xfer_align;
	u32 start_threshold;
	u32 stop_threshold;
	u32 silence_threshold;
	u32 silence_size;
	u32 boundary;
	unsigned char reserved[64];
};

/* recalcuate the boundary within 32bit */
static snd_pcm_uframes_t recalculate_boundary(struct snd_pcm_runtime *runtime)
{
	snd_pcm_uframes_t boundary;

	if (! runtime->buffer_size)
		return 0;
	boundary = runtime->buffer_size;
	while (boundary * 2 <= 0x7fffffffUL - runtime->buffer_size)
		boundary *= 2;
	return boundary;
}

static int snd_pcm_ioctl_sw_params_compat(struct snd_pcm_substream *substream,
					  struct snd_pcm_sw_params32 __user *src)
{
	struct snd_pcm_sw_params params;
	snd_pcm_uframes_t boundary;
	int err;

	memset(&params, 0, sizeof(params));
	if (get_user(params.tstamp_mode, &src->tstamp_mode) ||
	    get_user(params.period_step, &src->period_step) ||
	    get_user(params.sleep_min, &src->sleep_min) ||
	    get_user(params.avail_min, &src->avail_min) ||
	    get_user(params.xfer_align, &src->xfer_align) ||
	    get_user(params.start_threshold, &src->start_threshold) ||
	    get_user(params.stop_threshold, &src->stop_threshold) ||
	    get_user(params.silence_threshold, &src->silence_threshold) ||
	    get_user(params.silence_size, &src->silence_size))
		return -EFAULT;
	/*
	 * Check silent_size parameter.  Since we have 64bit boundary,
	 * silence_size must be compared with the 32bit boundary.
	 */
	boundary = recalculate_boundary(substream->runtime);
	if (boundary && params.silence_size >= boundary)
		params.silence_size = substream->runtime->boundary;
	err = snd_pcm_sw_params(substream, &params);
	if (err < 0)
		return err;
	if (boundary && put_user(boundary, &src->boundary))
		return -EFAULT;
	return err;
}

struct snd_pcm_channel_info32 {
	u32 channel;
	u32 offset;
	u32 first;
	u32 step;
};

static int snd_pcm_ioctl_channel_info_compat(struct snd_pcm_substream *substream,
					     struct snd_pcm_channel_info32 __user *src)
{
	struct snd_pcm_channel_info info;
	int err;

	if (get_user(info.channel, &src->channel) ||
	    get_user(info.offset, &src->offset) ||
	    get_user(info.first, &src->first) ||
	    get_user(info.step, &src->step))
		return -EFAULT;
	err = snd_pcm_channel_info(substream, &info);
	if (err < 0)
		return err;
	if (put_user(info.channel, &src->channel) ||
	    put_user(info.offset, &src->offset) ||
	    put_user(info.first, &src->first) ||
	    put_user(info.step, &src->step))
		return -EFAULT;
	return err;
}

struct snd_pcm_status32 {
	s32 state;
	struct compat_timespec trigger_tstamp;
	struct compat_timespec tstamp;
	u32 appl_ptr;
	u32 hw_ptr;
	s32 delay;
	u32 avail;
	u32 avail_max;
	u32 overrange;
	s32 suspended_state;
	unsigned char reserved[60];
} __attribute__((packed));


static int snd_pcm_status_user_compat(struct snd_pcm_substream *substream,
				      struct snd_pcm_status32 __user *src)
{
	struct snd_pcm_status status;
	int err;

	err = snd_pcm_status(substream, &status);
	if (err < 0)
		return err;

	if (put_user(status.state, &src->state) ||
	    put_user(status.trigger_tstamp.tv_sec, &src->trigger_tstamp.tv_sec) ||
	    put_user(status.trigger_tstamp.tv_nsec, &src->trigger_tstamp.tv_nsec) ||
	    put_user(status.tstamp.tv_sec, &src->tstamp.tv_sec) ||
	    put_user(status.tstamp.tv_nsec, &src->tstamp.tv_nsec) ||
	    put_user(status.appl_ptr, &src->appl_ptr) ||
	    put_user(status.hw_ptr, &src->hw_ptr) ||
	    put_user(status.delay, &src->delay) ||
	    put_user(status.avail, &src->avail) ||
	    put_user(status.avail_max, &src->avail_max) ||
	    put_user(status.overrange, &src->overrange) ||
	    put_user(status.suspended_state, &src->suspended_state))
		return -EFAULT;

	return err;
}

/* both for HW_PARAMS and HW_REFINE */
static int snd_pcm_ioctl_hw_params_compat(struct snd_pcm_substream *substream,
					  int refine, 
					  struct snd_pcm_hw_params32 __user *data32)
{
	struct snd_pcm_hw_params *data;
	struct snd_pcm_runtime *runtime;
	int err;

	if (! (runtime = substream->runtime))
		return -ENOTTY;

	data = kmalloc(sizeof(*data), GFP_KERNEL);
	if (data == NULL)
		return -ENOMEM;
	/* only fifo_size is different, so just copy all */
	if (copy_from_user(data, data32, sizeof(*data32))) {
		err = -EFAULT;
		goto error;
	}
	if (refine)
		err = snd_pcm_hw_refine(substream, data);
	else
		err = snd_pcm_hw_params(substream, data);
	if (err < 0)
		goto error;
	if (copy_to_user(data32, data, sizeof(*data32)) ||
	    put_user(data->fifo_size, &data32->fifo_size)) {
		err = -EFAULT;
		goto error;
	}

	if (! refine) {
		unsigned int new_boundary = recalculate_boundary(runtime);
		if (new_boundary)
			runtime->boundary = new_boundary;
	}
 error:
	kfree(data);
	return err;
}


/*
 */
struct snd_xferi32 {
	s32 result;
	u32 buf;
	u32 frames;
};

static int snd_pcm_ioctl_xferi_compat(struct snd_pcm_substream *substream,
				      int dir, struct snd_xferi32 __user *data32)
{
	compat_caddr_t buf;
	u32 frames;
	int err;

	if (! substream->runtime)
		return -ENOTTY;
	if (substream->stream != dir)
		return -EINVAL;
	if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN)
		return -EBADFD;

	if (get_user(buf, &data32->buf) ||
	    get_user(frames, &data32->frames))
		return -EFAULT;

	if (dir == SNDRV_PCM_STREAM_PLAYBACK)
		err = snd_pcm_lib_write(substream, compat_ptr(buf), frames);
	else
		err = snd_pcm_lib_read(substream, compat_ptr(buf), frames);
	if (err < 0)
		return err;
	/* copy the result */
	if (put_user(err, &data32->result))
		return -EFAULT;
	return 0;
}


/* snd_xfern needs remapping of bufs */
struct snd_xfern32 {
	s32 result;
	u32 bufs;  /* this is void **; */
	u32 frames;
};

/*
 * xfern ioctl nees to copy (up to) 128 pointers on stack.
 * although we may pass the copied pointers through f_op->ioctl, but the ioctl
 * handler there expands again the same 128 pointers on stack, so it is better
 * to handle the function (calling pcm_readv/writev) directly in this handler.
 */
static int snd_pcm_ioctl_xfern_compat(struct snd_pcm_substream *substream,
				      int dir, struct snd_xfern32 __user *data32)
{
	compat_caddr_t buf;
	compat_caddr_t __user *bufptr;
	u32 frames;
	void __user **bufs;
	int err, ch, i;

	if (! substream->runtime)
		return -ENOTTY;
	if (substream->stream != dir)
		return -EINVAL;

	if ((ch = substream->runtime->channels) > 128)
		return -EINVAL;
	if (get_user(buf, &data32->bufs) ||
	    get_user(frames, &data32->frames))
		return -EFAULT;
	bufptr = compat_ptr(buf);
	bufs = kmalloc(sizeof(void __user *) * ch, GFP_KERNEL);
	if (bufs == NULL)
		return -ENOMEM;
	for (i = 0; i < ch; i++) {
		u32 ptr;
		if (get_user(ptr, bufptr)) {
			kfree(bufs);
			return -EFAULT;
		}
		bufs[ch] = compat_ptr(ptr);
		bufptr++;
	}
	if (dir == SNDRV_PCM_STREAM_PLAYBACK)
		err = snd_pcm_lib_writev(substream, bufs, frames);
	else
		err = snd_pcm_lib_readv(substream, bufs, frames);
	if (err >= 0) {
		if (put_user(err, &data32->result))
			err = -EFAULT;
	}
	kfree(bufs);
	return err;
}


struct snd_pcm_mmap_status32 {
	s32 state;
	s32 pad1;
	u32 hw_ptr;
	struct compat_timespec tstamp;
	s32 suspended_state;
} __attribute__((packed));

struct snd_pcm_mmap_control32 {
	u32 appl_ptr;
	u32 avail_min;
};

struct snd_pcm_sync_ptr32 {
	u32 flags;
	union {
		struct snd_pcm_mmap_status32 status;
		unsigned char reserved[64];
	} s;
	union {
		struct snd_pcm_mmap_control32 control;
		unsigned char reserved[64];
	} c;
} __attribute__((packed));

static int snd_pcm_ioctl_sync_ptr_compat(struct snd_pcm_substream *substream,
					 struct snd_pcm_sync_ptr32 __user *src)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	volatile struct snd_pcm_mmap_status *status;
	volatile struct snd_pcm_mmap_control *control;
	u32 sflags;
	struct snd_pcm_mmap_control scontrol;
	struct snd_pcm_mmap_status sstatus;
	snd_pcm_uframes_t boundary;
	int err;

	snd_assert(runtime, return -EINVAL);

	if (get_user(sflags, &src->flags) ||
	    get_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
	    get_user(scontrol.avail_min, &src->c.control.avail_min))
		return -EFAULT;
	if (sflags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
		err = snd_pcm_hwsync(substream);
		if (err < 0)
			return err;
	}
	status = runtime->status;
	control = runtime->control;
	boundary = recalculate_boundary(runtime);
	if (! boundary)
		boundary = 0x7fffffff;
	snd_pcm_stream_lock_irq(substream);
	/* FIXME: we should consider the boundary for the sync from app */
	if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL))
		control->appl_ptr = scontrol.appl_ptr;
	else
		scontrol.appl_ptr = control->appl_ptr % boundary;
	if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
		control->avail_min = scontrol.avail_min;
	else
		scontrol.avail_min = control->avail_min;
	sstatus.state = status->state;
	sstatus.hw_ptr = status->hw_ptr % boundary;
	sstatus.tstamp = status->tstamp;
	sstatus.suspended_state = status->suspended_state;
	snd_pcm_stream_unlock_irq(substream);
	if (put_user(sstatus.state, &src->s.status.state) ||
	    put_user(sstatus.hw_ptr, &src->s.status.hw_ptr) ||
	    put_user(sstatus.tstamp.tv_sec, &src->s.status.tstamp.tv_sec) ||
	    put_user(sstatus.tstamp.tv_nsec, &src->s.status.tstamp.tv_nsec) ||
	    put_user(sstatus.suspended_state, &src->s.status.suspended_state) ||
	    put_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
	    put_user(scontrol.avail_min, &src->c.control.avail_min))
		return -EFAULT;

	return 0;
}


/*
 */
enum {
	SNDRV_PCM_IOCTL_HW_REFINE32 = _IOWR('A', 0x10, struct snd_pcm_hw_params32),
	SNDRV_PCM_IOCTL_HW_PARAMS32 = _IOWR('A', 0x11, struct snd_pcm_hw_params32),
	SNDRV_PCM_IOCTL_SW_PARAMS32 = _IOWR('A', 0x13, struct snd_pcm_sw_params32),
	SNDRV_PCM_IOCTL_STATUS32 = _IOR('A', 0x20, struct snd_pcm_status32),
	SNDRV_PCM_IOCTL_DELAY32 = _IOR('A', 0x21, s32),
	SNDRV_PCM_IOCTL_CHANNEL_INFO32 = _IOR('A', 0x32, struct snd_pcm_channel_info32),
	SNDRV_PCM_IOCTL_REWIND32 = _IOW('A', 0x46, u32),
	SNDRV_PCM_IOCTL_FORWARD32 = _IOW('A', 0x49, u32),
	SNDRV_PCM_IOCTL_WRITEI_FRAMES32 = _IOW('A', 0x50, struct snd_xferi32),
	SNDRV_PCM_IOCTL_READI_FRAMES32 = _IOR('A', 0x51, struct snd_xferi32),
	SNDRV_PCM_IOCTL_WRITEN_FRAMES32 = _IOW('A', 0x52, struct snd_xfern32),
	SNDRV_PCM_IOCTL_READN_FRAMES32 = _IOR('A', 0x53, struct snd_xfern32),
	SNDRV_PCM_IOCTL_SYNC_PTR32 = _IOWR('A', 0x23, struct snd_pcm_sync_ptr32),

};

static long snd_pcm_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
{
	struct snd_pcm_file *pcm_file;
	struct snd_pcm_substream *substream;
	void __user *argp = compat_ptr(arg);

	pcm_file = file->private_data;
	if (! pcm_file)
		return -ENOTTY;
	substream = pcm_file->substream;
	if (! substream)
		return -ENOTTY;

	/*
	 * When PCM is used on 32bit mode, we need to disable
	 * mmap of PCM status/control records because of the size
	 * incompatibility.
	 */
	pcm_file->no_compat_mmap = 1;

	switch (cmd) {
	case SNDRV_PCM_IOCTL_PVERSION:
	case SNDRV_PCM_IOCTL_INFO:
	case SNDRV_PCM_IOCTL_TSTAMP:
	case SNDRV_PCM_IOCTL_TTSTAMP:
	case SNDRV_PCM_IOCTL_HWSYNC:
	case SNDRV_PCM_IOCTL_PREPARE:
	case SNDRV_PCM_IOCTL_RESET:
	case SNDRV_PCM_IOCTL_START:
	case SNDRV_PCM_IOCTL_DROP:
	case SNDRV_PCM_IOCTL_DRAIN:
	case SNDRV_PCM_IOCTL_PAUSE:
	case SNDRV_PCM_IOCTL_HW_FREE:
	case SNDRV_PCM_IOCTL_RESUME:
	case SNDRV_PCM_IOCTL_XRUN:
	case SNDRV_PCM_IOCTL_LINK:
	case SNDRV_PCM_IOCTL_UNLINK:
		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
			return snd_pcm_playback_ioctl1(file, substream, cmd, argp);
		else
			return snd_pcm_capture_ioctl1(file, substream, cmd, argp);
	case SNDRV_PCM_IOCTL_HW_REFINE32:
		return snd_pcm_ioctl_hw_params_compat(substream, 1, argp);
	case SNDRV_PCM_IOCTL_HW_PARAMS32:
		return snd_pcm_ioctl_hw_params_compat(substream, 0, argp);
	case SNDRV_PCM_IOCTL_SW_PARAMS32:
		return snd_pcm_ioctl_sw_params_compat(substream, argp);
	case SNDRV_PCM_IOCTL_STATUS32:
		return snd_pcm_status_user_compat(substream, argp);
	case SNDRV_PCM_IOCTL_SYNC_PTR32:
		return snd_pcm_ioctl_sync_ptr_compat(substream, argp);
	case SNDRV_PCM_IOCTL_CHANNEL_INFO32:
		return snd_pcm_ioctl_channel_info_compat(substream, argp);
	case SNDRV_PCM_IOCTL_WRITEI_FRAMES32:
		return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
	case SNDRV_PCM_IOCTL_READI_FRAMES32:
		return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
	case SNDRV_PCM_IOCTL_WRITEN_FRAMES32:
		return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
	case SNDRV_PCM_IOCTL_READN_FRAMES32:
		return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
	case SNDRV_PCM_IOCTL_DELAY32:
		return snd_pcm_ioctl_delay_compat(substream, argp);
	case SNDRV_PCM_IOCTL_REWIND32:
		return snd_pcm_ioctl_rewind_compat(substream, argp);
	case SNDRV_PCM_IOCTL_FORWARD32:
		return snd_pcm_ioctl_forward_compat(substream, argp);
	}

	return -ENOIOCTLCMD;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* 32bit -> 64bit ioctl wrapper for PCM 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 pcm_native.c */
	22
	23	#include <linux/compat.h>
	24
877211f5	25	static int snd_pcm_ioctl_delay_compat(struct snd_pcm_substream *substream,
1da177e4 LT	26	s32 __user *src)
	27	{
	28	snd_pcm_sframes_t delay;
	29	mm_segment_t fs;
	30	int err;
	31
	32	fs = snd_enter_user();
	33	err = snd_pcm_delay(substream, &delay);
	34	snd_leave_user(fs);
	35	if (err < 0)
	36	return err;
	37	if (put_user(delay, src))
	38	return -EFAULT;
	39	return err;
	40	}
	41
877211f5	42	static int snd_pcm_ioctl_rewind_compat(struct snd_pcm_substream *substream,
1da177e4 LT	43	u32 __user *src)
	44	{
	45	snd_pcm_uframes_t frames;
	46	int err;
	47
	48	if (get_user(frames, src))
	49	return -EFAULT;
	50	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
	51	err = snd_pcm_playback_rewind(substream, frames);
	52	else
	53	err = snd_pcm_capture_rewind(substream, frames);
	54	if (put_user(err, src))
	55	return -EFAULT;
	56	return err < 0 ? err : 0;
	57	}
	58
877211f5	59	static int snd_pcm_ioctl_forward_compat(struct snd_pcm_substream *substream,
1da177e4 LT	60	u32 __user *src)
	61	{
	62	snd_pcm_uframes_t frames;
	63	int err;
	64
	65	if (get_user(frames, src))
	66	return -EFAULT;
	67	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
	68	err = snd_pcm_playback_forward(substream, frames);
	69	else
	70	err = snd_pcm_capture_forward(substream, frames);
	71	if (put_user(err, src))
	72	return -EFAULT;
	73	return err < 0 ? err : 0;
	74	}
	75
877211f5	76	struct snd_pcm_hw_params32 {
1da177e4	77	u32 flags;
877211f5 TI	78	struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - SNDRV_PCM_HW_PARAM_FIRST_MASK + 1]; /* this must be identical */
	79	struct snd_mask mres[5]; /* reserved masks */
	80	struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
	81	struct snd_interval ires[9]; /* reserved intervals */
1da177e4 LT	82	u32 rmask;
	83	u32 cmask;
	84	u32 info;
	85	u32 msbits;
	86	u32 rate_num;
	87	u32 rate_den;
	88	u32 fifo_size;
	89	unsigned char reserved[64];
	90	};
	91
877211f5	92	struct snd_pcm_sw_params32 {
1da177e4 LT	93	s32 tstamp_mode;
	94	u32 period_step;
	95	u32 sleep_min;
	96	u32 avail_min;
	97	u32 xfer_align;
	98	u32 start_threshold;
	99	u32 stop_threshold;
	100	u32 silence_threshold;
	101	u32 silence_size;
	102	u32 boundary;
	103	unsigned char reserved[64];
	104	};
	105
b2711310	106	/* recalcuate the boundary within 32bit */
877211f5	107	static snd_pcm_uframes_t recalculate_boundary(struct snd_pcm_runtime *runtime)
b2711310 TI	108	{
	109	snd_pcm_uframes_t boundary;
	110
	111	if (! runtime->buffer_size)
	112	return 0;
	113	boundary = runtime->buffer_size;
	114	while (boundary * 2 <= 0x7fffffffUL - runtime->buffer_size)
	115	boundary *= 2;
	116	return boundary;
	117	}
	118
877211f5 TI	119	static int snd_pcm_ioctl_sw_params_compat(struct snd_pcm_substream *substream,
877211f5 TI	120	struct snd_pcm_sw_params32 __user *src)
1da177e4	121	{
877211f5	122	struct snd_pcm_sw_params params;
b2711310	123	snd_pcm_uframes_t boundary;
1da177e4 LT	124	int err;
	125
	126	memset(&params, 0, sizeof(params));
	127	if (get_user(params.tstamp_mode, &src->tstamp_mode) \|\|
	128	get_user(params.period_step, &src->period_step) \|\|
	129	get_user(params.sleep_min, &src->sleep_min) \|\|
	130	get_user(params.avail_min, &src->avail_min) \|\|
	131	get_user(params.xfer_align, &src->xfer_align) \|\|
	132	get_user(params.start_threshold, &src->start_threshold) \|\|
	133	get_user(params.stop_threshold, &src->stop_threshold) \|\|
	134	get_user(params.silence_threshold, &src->silence_threshold) \|\|
	135	get_user(params.silence_size, &src->silence_size))
	136	return -EFAULT;
b2711310 TI	137	/*
	138	* Check silent_size parameter. Since we have 64bit boundary,
	139	* silence_size must be compared with the 32bit boundary.
	140	*/
	141	boundary = recalculate_boundary(substream->runtime);
	142	if (boundary && params.silence_size >= boundary)
	143	params.silence_size = substream->runtime->boundary;
1da177e4 LT	144	err = snd_pcm_sw_params(substream, &params);
	145	if (err < 0)
	146	return err;
7153a558	147	if (boundary && put_user(boundary, &src->boundary))
1da177e4 LT	148	return -EFAULT;
	149	return err;
	150	}
	151
877211f5	152	struct snd_pcm_channel_info32 {
1da177e4 LT	153	u32 channel;
	154	u32 offset;
	155	u32 first;
	156	u32 step;
	157	};
	158
877211f5 TI	159	static int snd_pcm_ioctl_channel_info_compat(struct snd_pcm_substream *substream,
877211f5 TI	160	struct snd_pcm_channel_info32 __user *src)
1da177e4	161	{
877211f5	162	struct snd_pcm_channel_info info;
1da177e4 LT	163	int err;
	164
	165	if (get_user(info.channel, &src->channel) \|\|
	166	get_user(info.offset, &src->offset) \|\|
	167	get_user(info.first, &src->first) \|\|
	168	get_user(info.step, &src->step))
	169	return -EFAULT;
	170	err = snd_pcm_channel_info(substream, &info);
	171	if (err < 0)
	172	return err;
	173	if (put_user(info.channel, &src->channel) \|\|
	174	put_user(info.offset, &src->offset) \|\|
	175	put_user(info.first, &src->first) \|\|
	176	put_user(info.step, &src->step))
	177	return -EFAULT;
	178	return err;
	179	}
	180
877211f5	181	struct snd_pcm_status32 {
1da177e4 LT	182	s32 state;
	183	struct compat_timespec trigger_tstamp;
	184	struct compat_timespec tstamp;
	185	u32 appl_ptr;
	186	u32 hw_ptr;
	187	s32 delay;
	188	u32 avail;
	189	u32 avail_max;
	190	u32 overrange;
	191	s32 suspended_state;
	192	unsigned char reserved[60];
	193	} __attribute__((packed));
	194
	195
877211f5 TI	196	static int snd_pcm_status_user_compat(struct snd_pcm_substream *substream,
877211f5 TI	197	struct snd_pcm_status32 __user *src)
1da177e4	198	{
877211f5	199	struct snd_pcm_status status;
1da177e4 LT	200	int err;
	201
	202	err = snd_pcm_status(substream, &status);
	203	if (err < 0)
	204	return err;
	205
	206	if (put_user(status.state, &src->state) \|\|
	207	put_user(status.trigger_tstamp.tv_sec, &src->trigger_tstamp.tv_sec) \|\|
	208	put_user(status.trigger_tstamp.tv_nsec, &src->trigger_tstamp.tv_nsec) \|\|
	209	put_user(status.tstamp.tv_sec, &src->tstamp.tv_sec) \|\|
	210	put_user(status.tstamp.tv_nsec, &src->tstamp.tv_nsec) \|\|
	211	put_user(status.appl_ptr, &src->appl_ptr) \|\|
	212	put_user(status.hw_ptr, &src->hw_ptr) \|\|
	213	put_user(status.delay, &src->delay) \|\|
	214	put_user(status.avail, &src->avail) \|\|
	215	put_user(status.avail_max, &src->avail_max) \|\|
	216	put_user(status.overrange, &src->overrange) \|\|
	217	put_user(status.suspended_state, &src->suspended_state))
	218	return -EFAULT;
	219
	220	return err;
	221	}
	222
1da177e4	223	/* both for HW_PARAMS and HW_REFINE */
877211f5	224	static int snd_pcm_ioctl_hw_params_compat(struct snd_pcm_substream *substream,
1da177e4	225	int refine,
877211f5	226	struct snd_pcm_hw_params32 __user *data32)
1da177e4	227	{
877211f5 TI	228	struct snd_pcm_hw_params *data;
877211f5 TI	229	struct snd_pcm_runtime *runtime;
1da177e4 LT	230	int err;
	231
	232	if (! (runtime = substream->runtime))
	233	return -ENOTTY;
	234
	235	data = kmalloc(sizeof(*data), GFP_KERNEL);
	236	if (data == NULL)
	237	return -ENOMEM;
	238	/* only fifo_size is different, so just copy all */
	239	if (copy_from_user(data, data32, sizeof(*data32))) {
	240	err = -EFAULT;
	241	goto error;
	242	}
	243	if (refine)
	244	err = snd_pcm_hw_refine(substream, data);
	245	else
	246	err = snd_pcm_hw_params(substream, data);
	247	if (err < 0)
	248	goto error;
	249	if (copy_to_user(data32, data, sizeof(*data32)) \|\|
	250	put_user(data->fifo_size, &data32->fifo_size)) {
	251	err = -EFAULT;
	252	goto error;
	253	}
	254
7153a558 TI	255	if (! refine) {
	256	unsigned int new_boundary = recalculate_boundary(runtime);
	257	if (new_boundary)
	258	runtime->boundary = new_boundary;
	259	}
1da177e4 LT	260	error:
	261	kfree(data);
	262	return err;
	263	}
	264
	265
	266	/*
	267	*/
877211f5	268	struct snd_xferi32 {
1da177e4 LT	269	s32 result;
	270	u32 buf;
	271	u32 frames;
	272	};
	273
877211f5 TI	274	static int snd_pcm_ioctl_xferi_compat(struct snd_pcm_substream *substream,
877211f5 TI	275	int dir, struct snd_xferi32 __user *data32)
1da177e4 LT	276	{
	277	compat_caddr_t buf;
	278	u32 frames;
	279	int err;
	280
	281	if (! substream->runtime)
	282	return -ENOTTY;
	283	if (substream->stream != dir)
	284	return -EINVAL;
	285	if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN)
	286	return -EBADFD;
	287
	288	if (get_user(buf, &data32->buf) \|\|
	289	get_user(frames, &data32->frames))
	290	return -EFAULT;
	291
	292	if (dir == SNDRV_PCM_STREAM_PLAYBACK)
	293	err = snd_pcm_lib_write(substream, compat_ptr(buf), frames);
	294	else
	295	err = snd_pcm_lib_read(substream, compat_ptr(buf), frames);
	296	if (err < 0)
	297	return err;
	298	/* copy the result */
	299	if (put_user(err, &data32->result))
	300	return -EFAULT;
	301	return 0;
	302	}
	303
	304
	305	/* snd_xfern needs remapping of bufs */
877211f5	306	struct snd_xfern32 {
1da177e4 LT	307	s32 result;
	308	u32 bufs; /* this is void *; /
	309	u32 frames;
	310	};
	311
	312	/*
	313	* xfern ioctl nees to copy (up to) 128 pointers on stack.
	314	* although we may pass the copied pointers through f_op->ioctl, but the ioctl
	315	* handler there expands again the same 128 pointers on stack, so it is better
	316	* to handle the function (calling pcm_readv/writev) directly in this handler.
	317	*/
877211f5 TI	318	static int snd_pcm_ioctl_xfern_compat(struct snd_pcm_substream *substream,
877211f5 TI	319	int dir, struct snd_xfern32 __user *data32)
1da177e4 LT	320	{
	321	compat_caddr_t buf;
	322	compat_caddr_t __user *bufptr;
	323	u32 frames;
	324	void __user **bufs;
	325	int err, ch, i;
	326
	327	if (! substream->runtime)
	328	return -ENOTTY;
	329	if (substream->stream != dir)
	330	return -EINVAL;
	331
	332	if ((ch = substream->runtime->channels) > 128)
	333	return -EINVAL;
	334	if (get_user(buf, &data32->bufs) \|\|
	335	get_user(frames, &data32->frames))
	336	return -EFAULT;
	337	bufptr = compat_ptr(buf);
	338	bufs = kmalloc(sizeof(void __user ) ch, GFP_KERNEL);
	339	if (bufs == NULL)
	340	return -ENOMEM;
	341	for (i = 0; i < ch; i++) {
	342	u32 ptr;
	343	if (get_user(ptr, bufptr)) {
	344	kfree(bufs);
	345	return -EFAULT;
	346	}
	347	bufs[ch] = compat_ptr(ptr);
	348	bufptr++;
	349	}
	350	if (dir == SNDRV_PCM_STREAM_PLAYBACK)
	351	err = snd_pcm_lib_writev(substream, bufs, frames);
	352	else
	353	err = snd_pcm_lib_readv(substream, bufs, frames);
	354	if (err >= 0) {
	355	if (put_user(err, &data32->result))
	356	err = -EFAULT;
	357	}
	358	kfree(bufs);
	359	return err;
	360	}
	361
	362
877211f5	363	struct snd_pcm_mmap_status32 {
1da177e4 LT	364	s32 state;
	365	s32 pad1;
	366	u32 hw_ptr;
	367	struct compat_timespec tstamp;
	368	s32 suspended_state;
	369	} __attribute__((packed));
	370
877211f5	371	struct snd_pcm_mmap_control32 {
1da177e4 LT	372	u32 appl_ptr;
	373	u32 avail_min;
	374	};
	375
877211f5	376	struct snd_pcm_sync_ptr32 {
1da177e4 LT	377	u32 flags;
1da177e4 LT	378	union {
877211f5	379	struct snd_pcm_mmap_status32 status;
1da177e4 LT	380	unsigned char reserved[64];
	381	} s;
	382	union {
877211f5	383	struct snd_pcm_mmap_control32 control;
1da177e4 LT	384	unsigned char reserved[64];
	385	} c;
	386	} __attribute__((packed));
	387
877211f5 TI	388	static int snd_pcm_ioctl_sync_ptr_compat(struct snd_pcm_substream *substream,
877211f5 TI	389	struct snd_pcm_sync_ptr32 __user *src)
1da177e4	390	{
877211f5 TI	391	struct snd_pcm_runtime *runtime = substream->runtime;
	392	volatile struct snd_pcm_mmap_status *status;
	393	volatile struct snd_pcm_mmap_control *control;
1da177e4	394	u32 sflags;
877211f5 TI	395	struct snd_pcm_mmap_control scontrol;
877211f5 TI	396	struct snd_pcm_mmap_status sstatus;
b2711310	397	snd_pcm_uframes_t boundary;
1da177e4 LT	398	int err;
	399
	400	snd_assert(runtime, return -EINVAL);
	401
	402	if (get_user(sflags, &src->flags) \|\|
	403	get_user(scontrol.appl_ptr, &src->c.control.appl_ptr) \|\|
	404	get_user(scontrol.avail_min, &src->c.control.avail_min))
	405	return -EFAULT;
	406	if (sflags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
	407	err = snd_pcm_hwsync(substream);
	408	if (err < 0)
	409	return err;
	410	}
	411	status = runtime->status;
	412	control = runtime->control;
b2711310	413	boundary = recalculate_boundary(runtime);
7153a558 TI	414	if (! boundary)
7153a558 TI	415	boundary = 0x7fffffff;
1da177e4	416	snd_pcm_stream_lock_irq(substream);
b2711310	417	/* FIXME: we should consider the boundary for the sync from app */
1da177e4 LT	418	if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL))
	419	control->appl_ptr = scontrol.appl_ptr;
	420	else
b2711310	421	scontrol.appl_ptr = control->appl_ptr % boundary;
1da177e4 LT	422	if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
	423	control->avail_min = scontrol.avail_min;
	424	else
	425	scontrol.avail_min = control->avail_min;
	426	sstatus.state = status->state;
b2711310	427	sstatus.hw_ptr = status->hw_ptr % boundary;
1da177e4 LT	428	sstatus.tstamp = status->tstamp;
	429	sstatus.suspended_state = status->suspended_state;
	430	snd_pcm_stream_unlock_irq(substream);
	431	if (put_user(sstatus.state, &src->s.status.state) \|\|
	432	put_user(sstatus.hw_ptr, &src->s.status.hw_ptr) \|\|
	433	put_user(sstatus.tstamp.tv_sec, &src->s.status.tstamp.tv_sec) \|\|
	434	put_user(sstatus.tstamp.tv_nsec, &src->s.status.tstamp.tv_nsec) \|\|
	435	put_user(sstatus.suspended_state, &src->s.status.suspended_state) \|\|
	436	put_user(scontrol.appl_ptr, &src->c.control.appl_ptr) \|\|
	437	put_user(scontrol.avail_min, &src->c.control.avail_min))
	438	return -EFAULT;
	439
	440	return 0;
	441	}
	442
	443
	444	/*
	445	*/
	446	enum {
877211f5 TI	447	SNDRV_PCM_IOCTL_HW_REFINE32 = _IOWR('A', 0x10, struct snd_pcm_hw_params32),
	448	SNDRV_PCM_IOCTL_HW_PARAMS32 = _IOWR('A', 0x11, struct snd_pcm_hw_params32),
	449	SNDRV_PCM_IOCTL_SW_PARAMS32 = _IOWR('A', 0x13, struct snd_pcm_sw_params32),
	450	SNDRV_PCM_IOCTL_STATUS32 = _IOR('A', 0x20, struct snd_pcm_status32),
1da177e4	451	SNDRV_PCM_IOCTL_DELAY32 = _IOR('A', 0x21, s32),
877211f5	452	SNDRV_PCM_IOCTL_CHANNEL_INFO32 = _IOR('A', 0x32, struct snd_pcm_channel_info32),
1da177e4 LT	453	SNDRV_PCM_IOCTL_REWIND32 = _IOW('A', 0x46, u32),
1da177e4 LT	454	SNDRV_PCM_IOCTL_FORWARD32 = _IOW('A', 0x49, u32),
877211f5 TI	455	SNDRV_PCM_IOCTL_WRITEI_FRAMES32 = _IOW('A', 0x50, struct snd_xferi32),
	456	SNDRV_PCM_IOCTL_READI_FRAMES32 = _IOR('A', 0x51, struct snd_xferi32),
	457	SNDRV_PCM_IOCTL_WRITEN_FRAMES32 = _IOW('A', 0x52, struct snd_xfern32),
	458	SNDRV_PCM_IOCTL_READN_FRAMES32 = _IOR('A', 0x53, struct snd_xfern32),
	459	SNDRV_PCM_IOCTL_SYNC_PTR32 = _IOWR('A', 0x23, struct snd_pcm_sync_ptr32),
1da177e4 LT	460
	461	};
	462
	463	static long snd_pcm_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
	464	{
877211f5 TI	465	struct snd_pcm_file *pcm_file;
877211f5 TI	466	struct snd_pcm_substream *substream;
1da177e4 LT	467	void __user *argp = compat_ptr(arg);
	468
	469	pcm_file = file->private_data;
	470	if (! pcm_file)
	471	return -ENOTTY;
	472	substream = pcm_file->substream;
	473	if (! substream)
	474	return -ENOTTY;
	475
	476	/*
	477	* When PCM is used on 32bit mode, we need to disable
	478	* mmap of PCM status/control records because of the size
	479	* incompatibility.
	480	*/
548a648b	481	pcm_file->no_compat_mmap = 1;
1da177e4 LT	482
	483	switch (cmd) {
	484	case SNDRV_PCM_IOCTL_PVERSION:
	485	case SNDRV_PCM_IOCTL_INFO:
5a7f2619	486	case SNDRV_PCM_IOCTL_TSTAMP:
6b587ef9	487	case SNDRV_PCM_IOCTL_TTSTAMP:
1da177e4 LT	488	case SNDRV_PCM_IOCTL_HWSYNC:
	489	case SNDRV_PCM_IOCTL_PREPARE:
	490	case SNDRV_PCM_IOCTL_RESET:
	491	case SNDRV_PCM_IOCTL_START:
	492	case SNDRV_PCM_IOCTL_DROP:
	493	case SNDRV_PCM_IOCTL_DRAIN:
	494	case SNDRV_PCM_IOCTL_PAUSE:
	495	case SNDRV_PCM_IOCTL_HW_FREE:
	496	case SNDRV_PCM_IOCTL_RESUME:
	497	case SNDRV_PCM_IOCTL_XRUN:
	498	case SNDRV_PCM_IOCTL_LINK:
	499	case SNDRV_PCM_IOCTL_UNLINK:
	500	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
0df63e44	501	return snd_pcm_playback_ioctl1(file, substream, cmd, argp);
1da177e4	502	else
0df63e44	503	return snd_pcm_capture_ioctl1(file, substream, cmd, argp);
1da177e4 LT	504	case SNDRV_PCM_IOCTL_HW_REFINE32:
	505	return snd_pcm_ioctl_hw_params_compat(substream, 1, argp);
	506	case SNDRV_PCM_IOCTL_HW_PARAMS32:
	507	return snd_pcm_ioctl_hw_params_compat(substream, 0, argp);
	508	case SNDRV_PCM_IOCTL_SW_PARAMS32:
	509	return snd_pcm_ioctl_sw_params_compat(substream, argp);
	510	case SNDRV_PCM_IOCTL_STATUS32:
	511	return snd_pcm_status_user_compat(substream, argp);
	512	case SNDRV_PCM_IOCTL_SYNC_PTR32:
	513	return snd_pcm_ioctl_sync_ptr_compat(substream, argp);
	514	case SNDRV_PCM_IOCTL_CHANNEL_INFO32:
	515	return snd_pcm_ioctl_channel_info_compat(substream, argp);
	516	case SNDRV_PCM_IOCTL_WRITEI_FRAMES32:
	517	return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
	518	case SNDRV_PCM_IOCTL_READI_FRAMES32:
	519	return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
	520	case SNDRV_PCM_IOCTL_WRITEN_FRAMES32:
	521	return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
	522	case SNDRV_PCM_IOCTL_READN_FRAMES32:
	523	return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
	524	case SNDRV_PCM_IOCTL_DELAY32:
	525	return snd_pcm_ioctl_delay_compat(substream, argp);
	526	case SNDRV_PCM_IOCTL_REWIND32:
	527	return snd_pcm_ioctl_rewind_compat(substream, argp);
	528	case SNDRV_PCM_IOCTL_FORWARD32:
	529	return snd_pcm_ioctl_forward_compat(substream, argp);
	530	}
	531
	532	return -ENOIOCTLCMD;
	533	}