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