[deliverable/linux.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 (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
	213	if (put_user(status.state, &src->state) \|\|
4eeaaeae PLB	214	compat_put_timespec(&status.trigger_tstamp, &src->trigger_tstamp) \|\|
4eeaaeae PLB	215	compat_put_timespec(&status.tstamp, &src->tstamp) \|\|
1da177e4 LT	216	put_user(status.appl_ptr, &src->appl_ptr) \|\|
	217	put_user(status.hw_ptr, &src->hw_ptr) \|\|
	218	put_user(status.delay, &src->delay) \|\|
	219	put_user(status.avail, &src->avail) \|\|
	220	put_user(status.avail_max, &src->avail_max) \|\|
	221	put_user(status.overrange, &src->overrange) \|\|
4eeaaeae PLB	222	put_user(status.suspended_state, &src->suspended_state) \|\|
4eeaaeae PLB	223	compat_put_timespec(&status.audio_tstamp, &src->audio_tstamp))
1da177e4 LT	224	return -EFAULT;
	225
	226	return err;
	227	}
	228
1da177e4	229	/* both for HW_PARAMS and HW_REFINE */
877211f5	230	static int snd_pcm_ioctl_hw_params_compat(struct snd_pcm_substream *substream,
1da177e4	231	int refine,
877211f5	232	struct snd_pcm_hw_params32 __user *data32)
1da177e4	233	{
877211f5 TI	234	struct snd_pcm_hw_params *data;
877211f5 TI	235	struct snd_pcm_runtime *runtime;
1da177e4 LT	236	int err;
	237
	238	if (! (runtime = substream->runtime))
	239	return -ENOTTY;
	240
1da177e4	241	/* only fifo_size is different, so just copy all */
ef44a1ec LZ	242	data = memdup_user(data32, sizeof(*data32));
	243	if (IS_ERR(data))
	244	return PTR_ERR(data);
	245
1da177e4 LT	246	if (refine)
	247	err = snd_pcm_hw_refine(substream, data);
	248	else
	249	err = snd_pcm_hw_params(substream, data);
	250	if (err < 0)
	251	goto error;
	252	if (copy_to_user(data32, data, sizeof(*data32)) \|\|
	253	put_user(data->fifo_size, &data32->fifo_size)) {
	254	err = -EFAULT;
	255	goto error;
	256	}
	257
7153a558 TI	258	if (! refine) {
	259	unsigned int new_boundary = recalculate_boundary(runtime);
	260	if (new_boundary)
	261	runtime->boundary = new_boundary;
	262	}
1da177e4 LT	263	error:
	264	kfree(data);
	265	return err;
	266	}
	267
	268
	269	/*
	270	*/
877211f5	271	struct snd_xferi32 {
1da177e4 LT	272	s32 result;
	273	u32 buf;
	274	u32 frames;
	275	};
	276
877211f5 TI	277	static int snd_pcm_ioctl_xferi_compat(struct snd_pcm_substream *substream,
877211f5 TI	278	int dir, struct snd_xferi32 __user *data32)
1da177e4 LT	279	{
	280	compat_caddr_t buf;
	281	u32 frames;
	282	int err;
	283
	284	if (! substream->runtime)
	285	return -ENOTTY;
	286	if (substream->stream != dir)
	287	return -EINVAL;
	288	if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN)
	289	return -EBADFD;
	290
	291	if (get_user(buf, &data32->buf) \|\|
	292	get_user(frames, &data32->frames))
	293	return -EFAULT;
	294
	295	if (dir == SNDRV_PCM_STREAM_PLAYBACK)
	296	err = snd_pcm_lib_write(substream, compat_ptr(buf), frames);
	297	else
	298	err = snd_pcm_lib_read(substream, compat_ptr(buf), frames);
	299	if (err < 0)
	300	return err;
	301	/* copy the result */
	302	if (put_user(err, &data32->result))
	303	return -EFAULT;
	304	return 0;
	305	}
	306
	307
	308	/* snd_xfern needs remapping of bufs */
877211f5	309	struct snd_xfern32 {
1da177e4 LT	310	s32 result;
	311	u32 bufs; /* this is void *; /
	312	u32 frames;
	313	};
	314
	315	/*
	316	* xfern ioctl nees to copy (up to) 128 pointers on stack.
	317	* although we may pass the copied pointers through f_op->ioctl, but the ioctl
	318	* handler there expands again the same 128 pointers on stack, so it is better
	319	* to handle the function (calling pcm_readv/writev) directly in this handler.
	320	*/
877211f5 TI	321	static int snd_pcm_ioctl_xfern_compat(struct snd_pcm_substream *substream,
877211f5 TI	322	int dir, struct snd_xfern32 __user *data32)
1da177e4 LT	323	{
	324	compat_caddr_t buf;
	325	compat_caddr_t __user *bufptr;
	326	u32 frames;
	327	void __user **bufs;
	328	int err, ch, i;
	329
	330	if (! substream->runtime)
	331	return -ENOTTY;
	332	if (substream->stream != dir)
	333	return -EINVAL;
	334
	335	if ((ch = substream->runtime->channels) > 128)
	336	return -EINVAL;
	337	if (get_user(buf, &data32->bufs) \|\|
	338	get_user(frames, &data32->frames))
	339	return -EFAULT;
	340	bufptr = compat_ptr(buf);
	341	bufs = kmalloc(sizeof(void __user ) ch, GFP_KERNEL);
	342	if (bufs == NULL)
	343	return -ENOMEM;
	344	for (i = 0; i < ch; i++) {
	345	u32 ptr;
	346	if (get_user(ptr, bufptr)) {
	347	kfree(bufs);
	348	return -EFAULT;
	349	}
ca9380fd	350	bufs[i] = compat_ptr(ptr);
1da177e4 LT	351	bufptr++;
	352	}
	353	if (dir == SNDRV_PCM_STREAM_PLAYBACK)
	354	err = snd_pcm_lib_writev(substream, bufs, frames);
	355	else
	356	err = snd_pcm_lib_readv(substream, bufs, frames);
	357	if (err >= 0) {
	358	if (put_user(err, &data32->result))
	359	err = -EFAULT;
	360	}
	361	kfree(bufs);
	362	return err;
	363	}
	364
	365
877211f5	366	struct snd_pcm_mmap_status32 {
1da177e4 LT	367	s32 state;
	368	s32 pad1;
	369	u32 hw_ptr;
	370	struct compat_timespec tstamp;
	371	s32 suspended_state;
4eeaaeae	372	struct compat_timespec audio_tstamp;
1da177e4 LT	373	} __attribute__((packed));
1da177e4 LT	374
877211f5	375	struct snd_pcm_mmap_control32 {
1da177e4 LT	376	u32 appl_ptr;
	377	u32 avail_min;
	378	};
	379
877211f5	380	struct snd_pcm_sync_ptr32 {
1da177e4 LT	381	u32 flags;
1da177e4 LT	382	union {
877211f5	383	struct snd_pcm_mmap_status32 status;
1da177e4 LT	384	unsigned char reserved[64];
	385	} s;
	386	union {
877211f5	387	struct snd_pcm_mmap_control32 control;
1da177e4 LT	388	unsigned char reserved[64];
	389	} c;
	390	} __attribute__((packed));
	391
877211f5 TI	392	static int snd_pcm_ioctl_sync_ptr_compat(struct snd_pcm_substream *substream,
877211f5 TI	393	struct snd_pcm_sync_ptr32 __user *src)
1da177e4	394	{
877211f5 TI	395	struct snd_pcm_runtime *runtime = substream->runtime;
	396	volatile struct snd_pcm_mmap_status *status;
	397	volatile struct snd_pcm_mmap_control *control;
1da177e4	398	u32 sflags;
877211f5 TI	399	struct snd_pcm_mmap_control scontrol;
877211f5 TI	400	struct snd_pcm_mmap_status sstatus;
b2711310	401	snd_pcm_uframes_t boundary;
1da177e4 LT	402	int err;
1da177e4 LT	403
7eaa943c TI	404	if (snd_BUG_ON(!runtime))
7eaa943c TI	405	return -EINVAL;
1da177e4 LT	406
	407	if (get_user(sflags, &src->flags) \|\|
	408	get_user(scontrol.appl_ptr, &src->c.control.appl_ptr) \|\|
	409	get_user(scontrol.avail_min, &src->c.control.avail_min))
	410	return -EFAULT;
	411	if (sflags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
	412	err = snd_pcm_hwsync(substream);
	413	if (err < 0)
	414	return err;
	415	}
	416	status = runtime->status;
	417	control = runtime->control;
b2711310	418	boundary = recalculate_boundary(runtime);
7153a558 TI	419	if (! boundary)
7153a558 TI	420	boundary = 0x7fffffff;
1da177e4	421	snd_pcm_stream_lock_irq(substream);
b2711310	422	/* FIXME: we should consider the boundary for the sync from app */
1da177e4 LT	423	if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL))
	424	control->appl_ptr = scontrol.appl_ptr;
	425	else
b2711310	426	scontrol.appl_ptr = control->appl_ptr % boundary;
1da177e4 LT	427	if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
	428	control->avail_min = scontrol.avail_min;
	429	else
	430	scontrol.avail_min = control->avail_min;
	431	sstatus.state = status->state;
b2711310	432	sstatus.hw_ptr = status->hw_ptr % boundary;
1da177e4 LT	433	sstatus.tstamp = status->tstamp;
1da177e4 LT	434	sstatus.suspended_state = status->suspended_state;
4eeaaeae	435	sstatus.audio_tstamp = status->audio_tstamp;
1da177e4 LT	436	snd_pcm_stream_unlock_irq(substream);
	437	if (put_user(sstatus.state, &src->s.status.state) \|\|
	438	put_user(sstatus.hw_ptr, &src->s.status.hw_ptr) \|\|
4eeaaeae	439	compat_put_timespec(&sstatus.tstamp, &src->s.status.tstamp) \|\|
1da177e4	440	put_user(sstatus.suspended_state, &src->s.status.suspended_state) \|\|
4eeaaeae PLB	441	compat_put_timespec(&sstatus.audio_tstamp,
4eeaaeae PLB	442	&src->s.status.audio_tstamp) \|\|
1da177e4 LT	443	put_user(scontrol.appl_ptr, &src->c.control.appl_ptr) \|\|
	444	put_user(scontrol.avail_min, &src->c.control.avail_min))
	445	return -EFAULT;
	446
	447	return 0;
	448	}
	449
	450
	451	/*
	452	*/
	453	enum {
877211f5 TI	454	SNDRV_PCM_IOCTL_HW_REFINE32 = _IOWR('A', 0x10, struct snd_pcm_hw_params32),
	455	SNDRV_PCM_IOCTL_HW_PARAMS32 = _IOWR('A', 0x11, struct snd_pcm_hw_params32),
	456	SNDRV_PCM_IOCTL_SW_PARAMS32 = _IOWR('A', 0x13, struct snd_pcm_sw_params32),
	457	SNDRV_PCM_IOCTL_STATUS32 = _IOR('A', 0x20, struct snd_pcm_status32),
1da177e4	458	SNDRV_PCM_IOCTL_DELAY32 = _IOR('A', 0x21, s32),
877211f5	459	SNDRV_PCM_IOCTL_CHANNEL_INFO32 = _IOR('A', 0x32, struct snd_pcm_channel_info32),
1da177e4 LT	460	SNDRV_PCM_IOCTL_REWIND32 = _IOW('A', 0x46, u32),
1da177e4 LT	461	SNDRV_PCM_IOCTL_FORWARD32 = _IOW('A', 0x49, u32),
877211f5 TI	462	SNDRV_PCM_IOCTL_WRITEI_FRAMES32 = _IOW('A', 0x50, struct snd_xferi32),
	463	SNDRV_PCM_IOCTL_READI_FRAMES32 = _IOR('A', 0x51, struct snd_xferi32),
	464	SNDRV_PCM_IOCTL_WRITEN_FRAMES32 = _IOW('A', 0x52, struct snd_xfern32),
	465	SNDRV_PCM_IOCTL_READN_FRAMES32 = _IOR('A', 0x53, struct snd_xfern32),
	466	SNDRV_PCM_IOCTL_SYNC_PTR32 = _IOWR('A', 0x23, struct snd_pcm_sync_ptr32),
1da177e4 LT	467
	468	};
	469
	470	static long snd_pcm_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
	471	{
877211f5 TI	472	struct snd_pcm_file *pcm_file;
877211f5 TI	473	struct snd_pcm_substream *substream;
1da177e4 LT	474	void __user *argp = compat_ptr(arg);
	475
	476	pcm_file = file->private_data;
	477	if (! pcm_file)
	478	return -ENOTTY;
	479	substream = pcm_file->substream;
	480	if (! substream)
	481	return -ENOTTY;
	482
	483	/*
	484	* When PCM is used on 32bit mode, we need to disable
	485	* mmap of PCM status/control records because of the size
	486	* incompatibility.
	487	*/
548a648b	488	pcm_file->no_compat_mmap = 1;
1da177e4 LT	489
	490	switch (cmd) {
	491	case SNDRV_PCM_IOCTL_PVERSION:
	492	case SNDRV_PCM_IOCTL_INFO:
5a7f2619	493	case SNDRV_PCM_IOCTL_TSTAMP:
6b587ef9	494	case SNDRV_PCM_IOCTL_TTSTAMP:
1da177e4 LT	495	case SNDRV_PCM_IOCTL_HWSYNC:
	496	case SNDRV_PCM_IOCTL_PREPARE:
	497	case SNDRV_PCM_IOCTL_RESET:
	498	case SNDRV_PCM_IOCTL_START:
	499	case SNDRV_PCM_IOCTL_DROP:
	500	case SNDRV_PCM_IOCTL_DRAIN:
	501	case SNDRV_PCM_IOCTL_PAUSE:
	502	case SNDRV_PCM_IOCTL_HW_FREE:
	503	case SNDRV_PCM_IOCTL_RESUME:
	504	case SNDRV_PCM_IOCTL_XRUN:
	505	case SNDRV_PCM_IOCTL_LINK:
	506	case SNDRV_PCM_IOCTL_UNLINK:
	507	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
0df63e44	508	return snd_pcm_playback_ioctl1(file, substream, cmd, argp);
1da177e4	509	else
0df63e44	510	return snd_pcm_capture_ioctl1(file, substream, cmd, argp);
1da177e4 LT	511	case SNDRV_PCM_IOCTL_HW_REFINE32:
	512	return snd_pcm_ioctl_hw_params_compat(substream, 1, argp);
	513	case SNDRV_PCM_IOCTL_HW_PARAMS32:
	514	return snd_pcm_ioctl_hw_params_compat(substream, 0, argp);
	515	case SNDRV_PCM_IOCTL_SW_PARAMS32:
	516	return snd_pcm_ioctl_sw_params_compat(substream, argp);
	517	case SNDRV_PCM_IOCTL_STATUS32:
	518	return snd_pcm_status_user_compat(substream, argp);
	519	case SNDRV_PCM_IOCTL_SYNC_PTR32:
	520	return snd_pcm_ioctl_sync_ptr_compat(substream, argp);
	521	case SNDRV_PCM_IOCTL_CHANNEL_INFO32:
	522	return snd_pcm_ioctl_channel_info_compat(substream, argp);
	523	case SNDRV_PCM_IOCTL_WRITEI_FRAMES32:
	524	return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
	525	case SNDRV_PCM_IOCTL_READI_FRAMES32:
	526	return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
	527	case SNDRV_PCM_IOCTL_WRITEN_FRAMES32:
	528	return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
	529	case SNDRV_PCM_IOCTL_READN_FRAMES32:
	530	return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
	531	case SNDRV_PCM_IOCTL_DELAY32:
	532	return snd_pcm_ioctl_delay_compat(substream, argp);
	533	case SNDRV_PCM_IOCTL_REWIND32:
	534	return snd_pcm_ioctl_rewind_compat(substream, argp);
	535	case SNDRV_PCM_IOCTL_FORWARD32:
	536	return snd_pcm_ioctl_forward_compat(substream, argp);
	537	}
	538
	539	return -ENOIOCTLCMD;
	540	}