[mirror_ubuntu-artful-kernel.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>
#include <linux/slab.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;
	u32 proto;
	u32 tstamp_type;
	unsigned char reserved[56];
};

/* 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) ||
	    get_user(params.tstamp_type, &src->tstamp_type) ||
	    get_user(params.proto, &src->proto))
		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;
	u32 reserved_alignment;
	struct compat_timespec audio_tstamp;
	unsigned char reserved[56-sizeof(struct compat_timespec)];
} __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 (clear_user(src, sizeof(*src)))
		return -EFAULT;
	if (put_user(status.state, &src->state) ||
	    compat_put_timespec(&status.trigger_tstamp, &src->trigger_tstamp) ||
	    compat_put_timespec(&status.tstamp, &src->tstamp) ||
	    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) ||
	    compat_put_timespec(&status.audio_tstamp, &src->audio_tstamp))
		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;

	/* only fifo_size is different, so just copy all */
	data = memdup_user(data32, sizeof(*data32));
	if (IS_ERR(data))
		return PTR_ERR(data);

	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[i] = 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;
	struct compat_timespec audio_tstamp;
} __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;

	if (snd_BUG_ON(!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;
	sstatus.audio_tstamp = status->audio_tstamp;
	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) ||
	    compat_put_timespec(&sstatus.tstamp, &src->s.status.tstamp) ||
	    put_user(sstatus.suspended_state, &src->s.status.suspended_state) ||
	    compat_put_timespec(&sstatus.audio_tstamp,
		    &src->s.status.audio_tstamp) ||
	    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>
5a0e3ad6	24	#include <linux/slab.h>
1da177e4	25
877211f5	26	static int snd_pcm_ioctl_delay_compat(struct snd_pcm_substream *substream,
1da177e4 LT	27	s32 __user *src)
	28	{
	29	snd_pcm_sframes_t delay;
	30	mm_segment_t fs;
	31	int err;
	32
	33	fs = snd_enter_user();
	34	err = snd_pcm_delay(substream, &delay);
	35	snd_leave_user(fs);
	36	if (err < 0)
	37	return err;
	38	if (put_user(delay, src))
	39	return -EFAULT;
	40	return err;
	41	}
	42
877211f5	43	static int snd_pcm_ioctl_rewind_compat(struct snd_pcm_substream *substream,
1da177e4 LT	44	u32 __user *src)
	45	{
	46	snd_pcm_uframes_t frames;
	47	int err;
	48
	49	if (get_user(frames, src))
	50	return -EFAULT;
	51	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
	52	err = snd_pcm_playback_rewind(substream, frames);
	53	else
	54	err = snd_pcm_capture_rewind(substream, frames);
	55	if (put_user(err, src))
	56	return -EFAULT;
	57	return err < 0 ? err : 0;
	58	}
	59
877211f5	60	static int snd_pcm_ioctl_forward_compat(struct snd_pcm_substream *substream,
1da177e4 LT	61	u32 __user *src)
	62	{
	63	snd_pcm_uframes_t frames;
	64	int err;
	65
	66	if (get_user(frames, src))
	67	return -EFAULT;
	68	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
	69	err = snd_pcm_playback_forward(substream, frames);
	70	else
	71	err = snd_pcm_capture_forward(substream, frames);
	72	if (put_user(err, src))
	73	return -EFAULT;
	74	return err < 0 ? err : 0;
	75	}
	76
877211f5	77	struct snd_pcm_hw_params32 {
1da177e4	78	u32 flags;
877211f5 TI	79	struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - SNDRV_PCM_HW_PARAM_FIRST_MASK + 1]; /* this must be identical */
	80	struct snd_mask mres[5]; /* reserved masks */
	81	struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
	82	struct snd_interval ires[9]; /* reserved intervals */
1da177e4 LT	83	u32 rmask;
	84	u32 cmask;
	85	u32 info;
	86	u32 msbits;
	87	u32 rate_num;
	88	u32 rate_den;
	89	u32 fifo_size;
	90	unsigned char reserved[64];
	91	};
	92
877211f5	93	struct snd_pcm_sw_params32 {
1da177e4 LT	94	s32 tstamp_mode;
	95	u32 period_step;
	96	u32 sleep_min;
	97	u32 avail_min;
	98	u32 xfer_align;
	99	u32 start_threshold;
	100	u32 stop_threshold;
	101	u32 silence_threshold;
	102	u32 silence_size;
	103	u32 boundary;
e58c295c TI	104	u32 proto;
	105	u32 tstamp_type;
	106	unsigned char reserved[56];
1da177e4 LT	107	};
1da177e4 LT	108
b2711310	109	/* recalcuate the boundary within 32bit */
877211f5	110	static snd_pcm_uframes_t recalculate_boundary(struct snd_pcm_runtime *runtime)
b2711310 TI	111	{
	112	snd_pcm_uframes_t boundary;
	113
	114	if (! runtime->buffer_size)
	115	return 0;
	116	boundary = runtime->buffer_size;
	117	while (boundary * 2 <= 0x7fffffffUL - runtime->buffer_size)
	118	boundary *= 2;
	119	return boundary;
	120	}
	121
877211f5 TI	122	static int snd_pcm_ioctl_sw_params_compat(struct snd_pcm_substream *substream,
877211f5 TI	123	struct snd_pcm_sw_params32 __user *src)
1da177e4	124	{
877211f5	125	struct snd_pcm_sw_params params;
b2711310	126	snd_pcm_uframes_t boundary;
1da177e4 LT	127	int err;
	128
	129	memset(&params, 0, sizeof(params));
	130	if (get_user(params.tstamp_mode, &src->tstamp_mode) \|\|
	131	get_user(params.period_step, &src->period_step) \|\|
	132	get_user(params.sleep_min, &src->sleep_min) \|\|
	133	get_user(params.avail_min, &src->avail_min) \|\|
	134	get_user(params.xfer_align, &src->xfer_align) \|\|
	135	get_user(params.start_threshold, &src->start_threshold) \|\|
	136	get_user(params.stop_threshold, &src->stop_threshold) \|\|
	137	get_user(params.silence_threshold, &src->silence_threshold) \|\|
e58c295c TI	138	get_user(params.silence_size, &src->silence_size) \|\|
	139	get_user(params.tstamp_type, &src->tstamp_type) \|\|
	140	get_user(params.proto, &src->proto))
1da177e4	141	return -EFAULT;
b2711310 TI	142	/*
	143	* Check silent_size parameter. Since we have 64bit boundary,
	144	* silence_size must be compared with the 32bit boundary.
	145	*/
	146	boundary = recalculate_boundary(substream->runtime);
	147	if (boundary && params.silence_size >= boundary)
	148	params.silence_size = substream->runtime->boundary;
1da177e4 LT	149	err = snd_pcm_sw_params(substream, &params);
	150	if (err < 0)
	151	return err;
7153a558	152	if (boundary && put_user(boundary, &src->boundary))
1da177e4 LT	153	return -EFAULT;
	154	return err;
	155	}
	156
877211f5	157	struct snd_pcm_channel_info32 {
1da177e4 LT	158	u32 channel;
	159	u32 offset;
	160	u32 first;
	161	u32 step;
	162	};
	163
877211f5 TI	164	static int snd_pcm_ioctl_channel_info_compat(struct snd_pcm_substream *substream,
877211f5 TI	165	struct snd_pcm_channel_info32 __user *src)
1da177e4	166	{
877211f5	167	struct snd_pcm_channel_info info;
1da177e4 LT	168	int err;
	169
	170	if (get_user(info.channel, &src->channel) \|\|
	171	get_user(info.offset, &src->offset) \|\|
	172	get_user(info.first, &src->first) \|\|
	173	get_user(info.step, &src->step))
	174	return -EFAULT;
	175	err = snd_pcm_channel_info(substream, &info);
	176	if (err < 0)
	177	return err;
	178	if (put_user(info.channel, &src->channel) \|\|
	179	put_user(info.offset, &src->offset) \|\|
	180	put_user(info.first, &src->first) \|\|
	181	put_user(info.step, &src->step))
	182	return -EFAULT;
	183	return err;
	184	}
	185
877211f5	186	struct snd_pcm_status32 {
1da177e4 LT	187	s32 state;
	188	struct compat_timespec trigger_tstamp;
	189	struct compat_timespec tstamp;
	190	u32 appl_ptr;
	191	u32 hw_ptr;
	192	s32 delay;
	193	u32 avail;
	194	u32 avail_max;
	195	u32 overrange;
	196	s32 suspended_state;
9c7066ae	197	u32 reserved_alignment;
4eeaaeae	198	struct compat_timespec audio_tstamp;
9c7066ae	199	unsigned char reserved[56-sizeof(struct compat_timespec)];
1da177e4 LT	200	} __attribute__((packed));
	201
	202
877211f5 TI	203	static int snd_pcm_status_user_compat(struct snd_pcm_substream *substream,
877211f5 TI	204	struct snd_pcm_status32 __user *src)
1da177e4	205	{
877211f5	206	struct snd_pcm_status status;
1da177e4 LT	207	int err;
	208
	209	err = snd_pcm_status(substream, &status);
	210	if (err < 0)
	211	return err;
	212
317168d0 TI	213	if (clear_user(src, sizeof(*src)))
317168d0 TI	214	return -EFAULT;
1da177e4	215	if (put_user(status.state, &src->state) \|\|
4eeaaeae PLB	216	compat_put_timespec(&status.trigger_tstamp, &src->trigger_tstamp) \|\|
4eeaaeae PLB	217	compat_put_timespec(&status.tstamp, &src->tstamp) \|\|
1da177e4 LT	218	put_user(status.appl_ptr, &src->appl_ptr) \|\|
	219	put_user(status.hw_ptr, &src->hw_ptr) \|\|
	220	put_user(status.delay, &src->delay) \|\|
	221	put_user(status.avail, &src->avail) \|\|
	222	put_user(status.avail_max, &src->avail_max) \|\|
	223	put_user(status.overrange, &src->overrange) \|\|
4eeaaeae PLB	224	put_user(status.suspended_state, &src->suspended_state) \|\|
4eeaaeae PLB	225	compat_put_timespec(&status.audio_tstamp, &src->audio_tstamp))
1da177e4 LT	226	return -EFAULT;
	227
	228	return err;
	229	}
	230
1da177e4	231	/* both for HW_PARAMS and HW_REFINE */
877211f5	232	static int snd_pcm_ioctl_hw_params_compat(struct snd_pcm_substream *substream,
1da177e4	233	int refine,
877211f5	234	struct snd_pcm_hw_params32 __user *data32)
1da177e4	235	{
877211f5 TI	236	struct snd_pcm_hw_params *data;
877211f5 TI	237	struct snd_pcm_runtime *runtime;
1da177e4 LT	238	int err;
	239
	240	if (! (runtime = substream->runtime))
	241	return -ENOTTY;
	242
1da177e4	243	/* only fifo_size is different, so just copy all */
ef44a1ec LZ	244	data = memdup_user(data32, sizeof(*data32));
	245	if (IS_ERR(data))
	246	return PTR_ERR(data);
	247
1da177e4 LT	248	if (refine)
	249	err = snd_pcm_hw_refine(substream, data);
	250	else
	251	err = snd_pcm_hw_params(substream, data);
	252	if (err < 0)
	253	goto error;
	254	if (copy_to_user(data32, data, sizeof(*data32)) \|\|
	255	put_user(data->fifo_size, &data32->fifo_size)) {
	256	err = -EFAULT;
	257	goto error;
	258	}
	259
7153a558 TI	260	if (! refine) {
	261	unsigned int new_boundary = recalculate_boundary(runtime);
	262	if (new_boundary)
	263	runtime->boundary = new_boundary;
	264	}
1da177e4 LT	265	error:
	266	kfree(data);
	267	return err;
	268	}
	269
	270
	271	/*
	272	*/
877211f5	273	struct snd_xferi32 {
1da177e4 LT	274	s32 result;
	275	u32 buf;
	276	u32 frames;
	277	};
	278
877211f5 TI	279	static int snd_pcm_ioctl_xferi_compat(struct snd_pcm_substream *substream,
877211f5 TI	280	int dir, struct snd_xferi32 __user *data32)
1da177e4 LT	281	{
	282	compat_caddr_t buf;
	283	u32 frames;
	284	int err;
	285
	286	if (! substream->runtime)
	287	return -ENOTTY;
	288	if (substream->stream != dir)
	289	return -EINVAL;
	290	if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN)
	291	return -EBADFD;
	292
	293	if (get_user(buf, &data32->buf) \|\|
	294	get_user(frames, &data32->frames))
	295	return -EFAULT;
	296
	297	if (dir == SNDRV_PCM_STREAM_PLAYBACK)
	298	err = snd_pcm_lib_write(substream, compat_ptr(buf), frames);
	299	else
	300	err = snd_pcm_lib_read(substream, compat_ptr(buf), frames);
	301	if (err < 0)
	302	return err;
	303	/* copy the result */
	304	if (put_user(err, &data32->result))
	305	return -EFAULT;
	306	return 0;
	307	}
	308
	309
	310	/* snd_xfern needs remapping of bufs */
877211f5	311	struct snd_xfern32 {
1da177e4 LT	312	s32 result;
	313	u32 bufs; /* this is void *; /
	314	u32 frames;
	315	};
	316
	317	/*
	318	* xfern ioctl nees to copy (up to) 128 pointers on stack.
	319	* although we may pass the copied pointers through f_op->ioctl, but the ioctl
	320	* handler there expands again the same 128 pointers on stack, so it is better
	321	* to handle the function (calling pcm_readv/writev) directly in this handler.
	322	*/
877211f5 TI	323	static int snd_pcm_ioctl_xfern_compat(struct snd_pcm_substream *substream,
877211f5 TI	324	int dir, struct snd_xfern32 __user *data32)
1da177e4 LT	325	{
	326	compat_caddr_t buf;
	327	compat_caddr_t __user *bufptr;
	328	u32 frames;
	329	void __user **bufs;
	330	int err, ch, i;
	331
	332	if (! substream->runtime)
	333	return -ENOTTY;
	334	if (substream->stream != dir)
	335	return -EINVAL;
	336
	337	if ((ch = substream->runtime->channels) > 128)
	338	return -EINVAL;
	339	if (get_user(buf, &data32->bufs) \|\|
	340	get_user(frames, &data32->frames))
	341	return -EFAULT;
	342	bufptr = compat_ptr(buf);
	343	bufs = kmalloc(sizeof(void __user ) ch, GFP_KERNEL);
	344	if (bufs == NULL)
	345	return -ENOMEM;
	346	for (i = 0; i < ch; i++) {
	347	u32 ptr;
	348	if (get_user(ptr, bufptr)) {
	349	kfree(bufs);
	350	return -EFAULT;
	351	}
ca9380fd	352	bufs[i] = compat_ptr(ptr);
1da177e4 LT	353	bufptr++;
	354	}
	355	if (dir == SNDRV_PCM_STREAM_PLAYBACK)
	356	err = snd_pcm_lib_writev(substream, bufs, frames);
	357	else
	358	err = snd_pcm_lib_readv(substream, bufs, frames);
	359	if (err >= 0) {
	360	if (put_user(err, &data32->result))
	361	err = -EFAULT;
	362	}
	363	kfree(bufs);
	364	return err;
	365	}
	366
	367
877211f5	368	struct snd_pcm_mmap_status32 {
1da177e4 LT	369	s32 state;
	370	s32 pad1;
	371	u32 hw_ptr;
	372	struct compat_timespec tstamp;
	373	s32 suspended_state;
4eeaaeae	374	struct compat_timespec audio_tstamp;
1da177e4 LT	375	} __attribute__((packed));
1da177e4 LT	376
877211f5	377	struct snd_pcm_mmap_control32 {
1da177e4 LT	378	u32 appl_ptr;
	379	u32 avail_min;
	380	};
	381
877211f5	382	struct snd_pcm_sync_ptr32 {
1da177e4 LT	383	u32 flags;
1da177e4 LT	384	union {
877211f5	385	struct snd_pcm_mmap_status32 status;
1da177e4 LT	386	unsigned char reserved[64];
	387	} s;
	388	union {
877211f5	389	struct snd_pcm_mmap_control32 control;
1da177e4 LT	390	unsigned char reserved[64];
	391	} c;
	392	} __attribute__((packed));
	393
877211f5 TI	394	static int snd_pcm_ioctl_sync_ptr_compat(struct snd_pcm_substream *substream,
877211f5 TI	395	struct snd_pcm_sync_ptr32 __user *src)
1da177e4	396	{
877211f5 TI	397	struct snd_pcm_runtime *runtime = substream->runtime;
	398	volatile struct snd_pcm_mmap_status *status;
	399	volatile struct snd_pcm_mmap_control *control;
1da177e4	400	u32 sflags;
877211f5 TI	401	struct snd_pcm_mmap_control scontrol;
877211f5 TI	402	struct snd_pcm_mmap_status sstatus;
b2711310	403	snd_pcm_uframes_t boundary;
1da177e4 LT	404	int err;
1da177e4 LT	405
7eaa943c TI	406	if (snd_BUG_ON(!runtime))
7eaa943c TI	407	return -EINVAL;
1da177e4 LT	408
	409	if (get_user(sflags, &src->flags) \|\|
	410	get_user(scontrol.appl_ptr, &src->c.control.appl_ptr) \|\|
	411	get_user(scontrol.avail_min, &src->c.control.avail_min))
	412	return -EFAULT;
	413	if (sflags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
	414	err = snd_pcm_hwsync(substream);
	415	if (err < 0)
	416	return err;
	417	}
	418	status = runtime->status;
	419	control = runtime->control;
b2711310	420	boundary = recalculate_boundary(runtime);
7153a558 TI	421	if (! boundary)
7153a558 TI	422	boundary = 0x7fffffff;
1da177e4	423	snd_pcm_stream_lock_irq(substream);
b2711310	424	/* FIXME: we should consider the boundary for the sync from app */
1da177e4 LT	425	if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL))
	426	control->appl_ptr = scontrol.appl_ptr;
	427	else
b2711310	428	scontrol.appl_ptr = control->appl_ptr % boundary;
1da177e4 LT	429	if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
	430	control->avail_min = scontrol.avail_min;
	431	else
	432	scontrol.avail_min = control->avail_min;
	433	sstatus.state = status->state;
b2711310	434	sstatus.hw_ptr = status->hw_ptr % boundary;
1da177e4 LT	435	sstatus.tstamp = status->tstamp;
1da177e4 LT	436	sstatus.suspended_state = status->suspended_state;
4eeaaeae	437	sstatus.audio_tstamp = status->audio_tstamp;
1da177e4 LT	438	snd_pcm_stream_unlock_irq(substream);
	439	if (put_user(sstatus.state, &src->s.status.state) \|\|
	440	put_user(sstatus.hw_ptr, &src->s.status.hw_ptr) \|\|
4eeaaeae	441	compat_put_timespec(&sstatus.tstamp, &src->s.status.tstamp) \|\|
1da177e4	442	put_user(sstatus.suspended_state, &src->s.status.suspended_state) \|\|
4eeaaeae PLB	443	compat_put_timespec(&sstatus.audio_tstamp,
4eeaaeae PLB	444	&src->s.status.audio_tstamp) \|\|
1da177e4 LT	445	put_user(scontrol.appl_ptr, &src->c.control.appl_ptr) \|\|
	446	put_user(scontrol.avail_min, &src->c.control.avail_min))
	447	return -EFAULT;
	448
	449	return 0;
	450	}
	451
	452
	453	/*
	454	*/
	455	enum {
877211f5 TI	456	SNDRV_PCM_IOCTL_HW_REFINE32 = _IOWR('A', 0x10, struct snd_pcm_hw_params32),
	457	SNDRV_PCM_IOCTL_HW_PARAMS32 = _IOWR('A', 0x11, struct snd_pcm_hw_params32),
	458	SNDRV_PCM_IOCTL_SW_PARAMS32 = _IOWR('A', 0x13, struct snd_pcm_sw_params32),
	459	SNDRV_PCM_IOCTL_STATUS32 = _IOR('A', 0x20, struct snd_pcm_status32),
1da177e4	460	SNDRV_PCM_IOCTL_DELAY32 = _IOR('A', 0x21, s32),
877211f5	461	SNDRV_PCM_IOCTL_CHANNEL_INFO32 = _IOR('A', 0x32, struct snd_pcm_channel_info32),
1da177e4 LT	462	SNDRV_PCM_IOCTL_REWIND32 = _IOW('A', 0x46, u32),
1da177e4 LT	463	SNDRV_PCM_IOCTL_FORWARD32 = _IOW('A', 0x49, u32),
877211f5 TI	464	SNDRV_PCM_IOCTL_WRITEI_FRAMES32 = _IOW('A', 0x50, struct snd_xferi32),
	465	SNDRV_PCM_IOCTL_READI_FRAMES32 = _IOR('A', 0x51, struct snd_xferi32),
	466	SNDRV_PCM_IOCTL_WRITEN_FRAMES32 = _IOW('A', 0x52, struct snd_xfern32),
	467	SNDRV_PCM_IOCTL_READN_FRAMES32 = _IOR('A', 0x53, struct snd_xfern32),
	468	SNDRV_PCM_IOCTL_SYNC_PTR32 = _IOWR('A', 0x23, struct snd_pcm_sync_ptr32),
1da177e4 LT	469
	470	};
	471
	472	static long snd_pcm_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
	473	{
877211f5 TI	474	struct snd_pcm_file *pcm_file;
877211f5 TI	475	struct snd_pcm_substream *substream;
1da177e4 LT	476	void __user *argp = compat_ptr(arg);
	477
	478	pcm_file = file->private_data;
	479	if (! pcm_file)
	480	return -ENOTTY;
	481	substream = pcm_file->substream;
	482	if (! substream)
	483	return -ENOTTY;
	484
	485	/*
	486	* When PCM is used on 32bit mode, we need to disable
	487	* mmap of PCM status/control records because of the size
	488	* incompatibility.
	489	*/
548a648b	490	pcm_file->no_compat_mmap = 1;
1da177e4 LT	491
	492	switch (cmd) {
	493	case SNDRV_PCM_IOCTL_PVERSION:
	494	case SNDRV_PCM_IOCTL_INFO:
5a7f2619	495	case SNDRV_PCM_IOCTL_TSTAMP:
6b587ef9	496	case SNDRV_PCM_IOCTL_TTSTAMP:
1da177e4 LT	497	case SNDRV_PCM_IOCTL_HWSYNC:
	498	case SNDRV_PCM_IOCTL_PREPARE:
	499	case SNDRV_PCM_IOCTL_RESET:
	500	case SNDRV_PCM_IOCTL_START:
	501	case SNDRV_PCM_IOCTL_DROP:
	502	case SNDRV_PCM_IOCTL_DRAIN:
	503	case SNDRV_PCM_IOCTL_PAUSE:
	504	case SNDRV_PCM_IOCTL_HW_FREE:
	505	case SNDRV_PCM_IOCTL_RESUME:
	506	case SNDRV_PCM_IOCTL_XRUN:
	507	case SNDRV_PCM_IOCTL_LINK:
	508	case SNDRV_PCM_IOCTL_UNLINK:
	509	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
0df63e44	510	return snd_pcm_playback_ioctl1(file, substream, cmd, argp);
1da177e4	511	else
0df63e44	512	return snd_pcm_capture_ioctl1(file, substream, cmd, argp);
1da177e4 LT	513	case SNDRV_PCM_IOCTL_HW_REFINE32:
	514	return snd_pcm_ioctl_hw_params_compat(substream, 1, argp);
	515	case SNDRV_PCM_IOCTL_HW_PARAMS32:
	516	return snd_pcm_ioctl_hw_params_compat(substream, 0, argp);
	517	case SNDRV_PCM_IOCTL_SW_PARAMS32:
	518	return snd_pcm_ioctl_sw_params_compat(substream, argp);
	519	case SNDRV_PCM_IOCTL_STATUS32:
	520	return snd_pcm_status_user_compat(substream, argp);
	521	case SNDRV_PCM_IOCTL_SYNC_PTR32:
	522	return snd_pcm_ioctl_sync_ptr_compat(substream, argp);
	523	case SNDRV_PCM_IOCTL_CHANNEL_INFO32:
	524	return snd_pcm_ioctl_channel_info_compat(substream, argp);
	525	case SNDRV_PCM_IOCTL_WRITEI_FRAMES32:
	526	return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
	527	case SNDRV_PCM_IOCTL_READI_FRAMES32:
	528	return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
	529	case SNDRV_PCM_IOCTL_WRITEN_FRAMES32:
	530	return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
	531	case SNDRV_PCM_IOCTL_READN_FRAMES32:
	532	return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
	533	case SNDRV_PCM_IOCTL_DELAY32:
	534	return snd_pcm_ioctl_delay_compat(substream, argp);
	535	case SNDRV_PCM_IOCTL_REWIND32:
	536	return snd_pcm_ioctl_rewind_compat(substream, argp);
	537	case SNDRV_PCM_IOCTL_FORWARD32:
	538	return snd_pcm_ioctl_forward_compat(substream, argp);
	539	}
	540
	541	return -ENOIOCTLCMD;
	542	}