[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>

static int snd_pcm_ioctl_delay_compat(snd_pcm_substream_t *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(snd_pcm_substream_t *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(snd_pcm_substream_t *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 sndrv_pcm_hw_params32 {
	u32 flags;
	struct sndrv_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - SNDRV_PCM_HW_PARAM_FIRST_MASK + 1]; /* this must be identical */
	struct sndrv_mask mres[5];	/* reserved masks */
	struct sndrv_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
	struct sndrv_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 sndrv_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(snd_pcm_runtime_t *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(snd_pcm_substream_t *substream,
					  struct sndrv_pcm_sw_params32 __user *src)
{
	snd_pcm_sw_params_t 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 (put_user(boundary, &src->boundary))
		return -EFAULT;
	return err;
}

struct sndrv_pcm_channel_info32 {
	u32 channel;
	u32 offset;
	u32 first;
	u32 step;
};

static int snd_pcm_ioctl_channel_info_compat(snd_pcm_substream_t *substream,
					     struct sndrv_pcm_channel_info32 __user *src)
{
	snd_pcm_channel_info_t 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 sndrv_pcm_status32 {
	s32 state;
	struct compat_timespec trigger_tstamp;
	struct compat_timespec tstamp;
	u32 appl_ptr;
	u32 hw_ptr;
	s32 delay;
	u32 avail;
	u32 avail_max;
	u32 overrange;
	s32 suspended_state;
	unsigned char reserved[60];
} __attribute__((packed));


static int snd_pcm_status_user_compat(snd_pcm_substream_t *substream,
				      struct sndrv_pcm_status32 __user *src)
{
	snd_pcm_status_t status;
	int err;

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

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

	return err;
}

/* both for HW_PARAMS and HW_REFINE */
static int snd_pcm_ioctl_hw_params_compat(snd_pcm_substream_t *substream,
					  int refine, 
					  struct sndrv_pcm_hw_params32 __user *data32)
{
	struct sndrv_pcm_hw_params *data;
	snd_pcm_runtime_t *runtime;
	int err;

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

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

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


/*
 */
struct sndrv_xferi32 {
	s32 result;
	u32 buf;
	u32 frames;
};

static int snd_pcm_ioctl_xferi_compat(snd_pcm_substream_t *substream,
				      int dir, struct sndrv_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 sndrv_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(snd_pcm_substream_t *substream,
				      int dir, struct sndrv_xfern32 __user *data32)
{
	compat_caddr_t buf;
	compat_caddr_t __user *bufptr;
	u32 frames;
	void __user **bufs;
	int err, ch, i;

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

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


struct sndrv_pcm_mmap_status32 {
	s32 state;
	s32 pad1;
	u32 hw_ptr;
	struct compat_timespec tstamp;
	s32 suspended_state;
} __attribute__((packed));

struct sndrv_pcm_mmap_control32 {
	u32 appl_ptr;
	u32 avail_min;
};

struct sndrv_pcm_sync_ptr32 {
	u32 flags;
	union {
		struct sndrv_pcm_mmap_status32 status;
		unsigned char reserved[64];
	} s;
	union {
		struct sndrv_pcm_mmap_control32 control;
		unsigned char reserved[64];
	} c;
} __attribute__((packed));

static int snd_pcm_ioctl_sync_ptr_compat(snd_pcm_substream_t *substream,
					 struct sndrv_pcm_sync_ptr32 __user *src)
{
	snd_pcm_runtime_t *runtime = substream->runtime;
	volatile struct sndrv_pcm_mmap_status *status;
	volatile struct sndrv_pcm_mmap_control *control;
	u32 sflags;
	struct sndrv_pcm_mmap_control scontrol;
	struct sndrv_pcm_mmap_status sstatus;
	snd_pcm_uframes_t boundary;
	int err;

	snd_assert(runtime, return -EINVAL);

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

	return 0;
}


/*
 */
enum {
	SNDRV_PCM_IOCTL_HW_REFINE32 = _IOWR('A', 0x10, struct sndrv_pcm_hw_params32),
	SNDRV_PCM_IOCTL_HW_PARAMS32 = _IOWR('A', 0x11, struct sndrv_pcm_hw_params32),
	SNDRV_PCM_IOCTL_SW_PARAMS32 = _IOWR('A', 0x13, struct sndrv_pcm_sw_params32),
	SNDRV_PCM_IOCTL_STATUS32 = _IOR('A', 0x20, struct sndrv_pcm_status32),
	SNDRV_PCM_IOCTL_DELAY32 = _IOR('A', 0x21, s32),
	SNDRV_PCM_IOCTL_CHANNEL_INFO32 = _IOR('A', 0x32, struct sndrv_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 sndrv_xferi32),
	SNDRV_PCM_IOCTL_READI_FRAMES32 = _IOR('A', 0x51, struct sndrv_xferi32),
	SNDRV_PCM_IOCTL_WRITEN_FRAMES32 = _IOW('A', 0x52, struct sndrv_xfern32),
	SNDRV_PCM_IOCTL_READN_FRAMES32 = _IOR('A', 0x53, struct sndrv_xfern32),
	SNDRV_PCM_IOCTL_SYNC_PTR32 = _IOWR('A', 0x23, struct sndrv_pcm_sync_ptr32),

};

static long snd_pcm_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
{
	snd_pcm_file_t *pcm_file;
	snd_pcm_substream_t *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.
	 */
	substream->no_mmap_ctrl = 1;

	switch (cmd) {
	case SNDRV_PCM_IOCTL_PVERSION:
	case SNDRV_PCM_IOCTL_INFO:
	case SNDRV_PCM_IOCTL_TSTAMP:
	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(substream, cmd, argp);
		else
			return snd_pcm_capture_ioctl1(substream, cmd, argp);
	case SNDRV_PCM_IOCTL_HW_REFINE32:
		return snd_pcm_ioctl_hw_params_compat(substream, 1, argp);
	case SNDRV_PCM_IOCTL_HW_PARAMS32:
		return snd_pcm_ioctl_hw_params_compat(substream, 0, argp);
	case SNDRV_PCM_IOCTL_SW_PARAMS32:
		return snd_pcm_ioctl_sw_params_compat(substream, argp);
	case SNDRV_PCM_IOCTL_STATUS32:
		return snd_pcm_status_user_compat(substream, argp);
	case SNDRV_PCM_IOCTL_SYNC_PTR32:
		return snd_pcm_ioctl_sync_ptr_compat(substream, argp);
	case SNDRV_PCM_IOCTL_CHANNEL_INFO32:
		return snd_pcm_ioctl_channel_info_compat(substream, argp);
	case SNDRV_PCM_IOCTL_WRITEI_FRAMES32:
		return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
	case SNDRV_PCM_IOCTL_READI_FRAMES32:
		return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
	case SNDRV_PCM_IOCTL_WRITEN_FRAMES32:
		return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
	case SNDRV_PCM_IOCTL_READN_FRAMES32:
		return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
	case SNDRV_PCM_IOCTL_DELAY32:
		return snd_pcm_ioctl_delay_compat(substream, argp);
	case SNDRV_PCM_IOCTL_REWIND32:
		return snd_pcm_ioctl_rewind_compat(substream, argp);
	case SNDRV_PCM_IOCTL_FORWARD32:
		return snd_pcm_ioctl_forward_compat(substream, argp);
	}

	return -ENOIOCTLCMD;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* 32bit -> 64bit ioctl wrapper for PCM API
	3	* Copyright (c) by Takashi Iwai <tiwai@suse.de>
	4	*
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License as published by
	7	* the Free Software Foundation; either version 2 of the License, or
	8	* (at your option) any later version.
	9	*
	10	* This program is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU General Public License
	16	* along with this program; if not, write to the Free Software
	17	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	18	*
	19	*/
	20
	21	/* This file included from pcm_native.c */
	22
	23	#include <linux/compat.h>
	24
	25	static int snd_pcm_ioctl_delay_compat(snd_pcm_substream_t *substream,
	26	s32 __user *src)
	27	{
	28	snd_pcm_sframes_t delay;
	29	mm_segment_t fs;
	30	int err;
	31
	32	fs = snd_enter_user();
	33	err = snd_pcm_delay(substream, &delay);
	34	snd_leave_user(fs);
	35	if (err < 0)
	36	return err;
	37	if (put_user(delay, src))
	38	return -EFAULT;
	39	return err;
	40	}
	41
	42	static int snd_pcm_ioctl_rewind_compat(snd_pcm_substream_t *substream,
	43	u32 __user *src)
	44	{
	45	snd_pcm_uframes_t frames;
	46	int err;
	47
	48	if (get_user(frames, src))
	49	return -EFAULT;
	50	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
	51	err = snd_pcm_playback_rewind(substream, frames);
	52	else
	53	err = snd_pcm_capture_rewind(substream, frames);
	54	if (put_user(err, src))
	55	return -EFAULT;
	56	return err < 0 ? err : 0;
	57	}
	58
	59	static int snd_pcm_ioctl_forward_compat(snd_pcm_substream_t *substream,
	60	u32 __user *src)
	61	{
	62	snd_pcm_uframes_t frames;
	63	int err;
	64
65	if (get_user(frames, src))
66	return -EFAULT;
67	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
68	err = snd_pcm_playback_forward(substream, frames);
69	else
70	err = snd_pcm_capture_forward(substream, frames);
71	if (put_user(err, src))
72	return -EFAULT;
73	return err < 0 ? err : 0;
74	}
75
76	struct sndrv_pcm_hw_params32 {
77	u32 flags;
78	struct sndrv_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - SNDRV_PCM_HW_PARAM_FIRST_MASK + 1]; /* this must be identical */
79	struct sndrv_mask mres[5]; /* reserved masks */
80	struct sndrv_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
81	struct sndrv_interval ires[9]; /* reserved intervals */
82	u32 rmask;
83	u32 cmask;
84	u32 info;
85	u32 msbits;
86	u32 rate_num;
87	u32 rate_den;
88	u32 fifo_size;
89	unsigned char reserved[64];
90	};
91
92	struct sndrv_pcm_sw_params32 {
93	s32 tstamp_mode;
94	u32 period_step;
95	u32 sleep_min;
96	u32 avail_min;
97	u32 xfer_align;
98	u32 start_threshold;
99	u32 stop_threshold;
100	u32 silence_threshold;
101	u32 silence_size;
102	u32 boundary;
103	unsigned char reserved[64];
104	};
105
b2711310 TI	106	/* recalcuate the boundary within 32bit */
	107	static snd_pcm_uframes_t recalculate_boundary(snd_pcm_runtime_t *runtime)
	108	{
	109	snd_pcm_uframes_t boundary;
	110
	111	if (! runtime->buffer_size)
	112	return 0;
	113	boundary = runtime->buffer_size;
	114	while (boundary * 2 <= 0x7fffffffUL - runtime->buffer_size)
	115	boundary *= 2;
	116	return boundary;
	117	}
	118
1da177e4 LT	119	static int snd_pcm_ioctl_sw_params_compat(snd_pcm_substream_t *substream,
	120	struct sndrv_pcm_sw_params32 __user *src)
	121	{
	122	snd_pcm_sw_params_t params;
b2711310	123	snd_pcm_uframes_t boundary;
1da177e4 LT	124	int err;
	125
	126	memset(&params, 0, sizeof(params));
	127	if (get_user(params.tstamp_mode, &src->tstamp_mode) \|\|
	128	get_user(params.period_step, &src->period_step) \|\|
	129	get_user(params.sleep_min, &src->sleep_min) \|\|
	130	get_user(params.avail_min, &src->avail_min) \|\|
	131	get_user(params.xfer_align, &src->xfer_align) \|\|
	132	get_user(params.start_threshold, &src->start_threshold) \|\|
	133	get_user(params.stop_threshold, &src->stop_threshold) \|\|
	134	get_user(params.silence_threshold, &src->silence_threshold) \|\|
	135	get_user(params.silence_size, &src->silence_size))
	136	return -EFAULT;
b2711310 TI	137	/*
	138	* Check silent_size parameter. Since we have 64bit boundary,
	139	* silence_size must be compared with the 32bit boundary.
	140	*/
	141	boundary = recalculate_boundary(substream->runtime);
	142	if (boundary && params.silence_size >= boundary)
	143	params.silence_size = substream->runtime->boundary;
1da177e4 LT	144	err = snd_pcm_sw_params(substream, &params);
	145	if (err < 0)
	146	return err;
b2711310	147	if (put_user(boundary, &src->boundary))
1da177e4 LT	148	return -EFAULT;
	149	return err;
	150	}
	151
	152	struct sndrv_pcm_channel_info32 {
	153	u32 channel;
	154	u32 offset;
	155	u32 first;
	156	u32 step;
	157	};
	158
	159	static int snd_pcm_ioctl_channel_info_compat(snd_pcm_substream_t *substream,
	160	struct sndrv_pcm_channel_info32 __user *src)
	161	{
	162	snd_pcm_channel_info_t info;
	163	int err;
	164
	165	if (get_user(info.channel, &src->channel) \|\|
	166	get_user(info.offset, &src->offset) \|\|
	167	get_user(info.first, &src->first) \|\|
	168	get_user(info.step, &src->step))
	169	return -EFAULT;
	170	err = snd_pcm_channel_info(substream, &info);
	171	if (err < 0)
	172	return err;
	173	if (put_user(info.channel, &src->channel) \|\|
	174	put_user(info.offset, &src->offset) \|\|
	175	put_user(info.first, &src->first) \|\|
	176	put_user(info.step, &src->step))
	177	return -EFAULT;
	178	return err;
	179	}
	180
	181	struct sndrv_pcm_status32 {
	182	s32 state;
	183	struct compat_timespec trigger_tstamp;
	184	struct compat_timespec tstamp;
	185	u32 appl_ptr;
	186	u32 hw_ptr;
	187	s32 delay;
	188	u32 avail;
	189	u32 avail_max;
	190	u32 overrange;
	191	s32 suspended_state;
	192	unsigned char reserved[60];
	193	} __attribute__((packed));
	194
	195
	196	static int snd_pcm_status_user_compat(snd_pcm_substream_t *substream,
	197	struct sndrv_pcm_status32 __user *src)
	198	{
	199	snd_pcm_status_t status;
	200	int err;
	201
	202	err = snd_pcm_status(substream, &status);
	203	if (err < 0)
	204	return err;
	205
	206	if (put_user(status.state, &src->state) \|\|
	207	put_user(status.trigger_tstamp.tv_sec, &src->trigger_tstamp.tv_sec) \|\|
	208	put_user(status.trigger_tstamp.tv_nsec, &src->trigger_tstamp.tv_nsec) \|\|
	209	put_user(status.tstamp.tv_sec, &src->tstamp.tv_sec) \|\|
	210	put_user(status.tstamp.tv_nsec, &src->tstamp.tv_nsec) \|\|
	211	put_user(status.appl_ptr, &src->appl_ptr) \|\|
212	put_user(status.hw_ptr, &src->hw_ptr) \|\|
213	put_user(status.delay, &src->delay) \|\|
214	put_user(status.avail, &src->avail) \|\|
215	put_user(status.avail_max, &src->avail_max) \|\|
216	put_user(status.overrange, &src->overrange) \|\|
217	put_user(status.suspended_state, &src->suspended_state))
218	return -EFAULT;
219
220	return err;
221	}
222
1da177e4 LT	223	/* both for HW_PARAMS and HW_REFINE */
	224	static int snd_pcm_ioctl_hw_params_compat(snd_pcm_substream_t *substream,
	225	int refine,
	226	struct sndrv_pcm_hw_params32 __user *data32)
	227	{
	228	struct sndrv_pcm_hw_params *data;
	229	snd_pcm_runtime_t *runtime;
	230	int err;
	231
	232	if (! (runtime = substream->runtime))
	233	return -ENOTTY;
	234
	235	data = kmalloc(sizeof(*data), GFP_KERNEL);
	236	if (data == NULL)
	237	return -ENOMEM;
	238	/* only fifo_size is different, so just copy all */
	239	if (copy_from_user(data, data32, sizeof(*data32))) {
	240	err = -EFAULT;
	241	goto error;
	242	}
	243	if (refine)
	244	err = snd_pcm_hw_refine(substream, data);
	245	else
	246	err = snd_pcm_hw_params(substream, data);
	247	if (err < 0)
	248	goto error;
	249	if (copy_to_user(data32, data, sizeof(*data32)) \|\|
	250	put_user(data->fifo_size, &data32->fifo_size)) {
	251	err = -EFAULT;
	252	goto error;
	253	}
	254
	255	if (! refine)
b2711310	256	runtime->boundary = recalculate_boundary(runtime);
1da177e4 LT	257	error:
	258	kfree(data);
	259	return err;
	260	}
	261
	262
	263	/*
	264	*/
	265	struct sndrv_xferi32 {
	266	s32 result;
	267	u32 buf;
	268	u32 frames;
	269	};
	270
	271	static int snd_pcm_ioctl_xferi_compat(snd_pcm_substream_t *substream,
	272	int dir, struct sndrv_xferi32 __user *data32)
	273	{
	274	compat_caddr_t buf;
	275	u32 frames;
	276	int err;
	277
	278	if (! substream->runtime)
	279	return -ENOTTY;
	280	if (substream->stream != dir)
	281	return -EINVAL;
	282	if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN)
	283	return -EBADFD;
	284
	285	if (get_user(buf, &data32->buf) \|\|
	286	get_user(frames, &data32->frames))
	287	return -EFAULT;
	288
	289	if (dir == SNDRV_PCM_STREAM_PLAYBACK)
	290	err = snd_pcm_lib_write(substream, compat_ptr(buf), frames);
	291	else
	292	err = snd_pcm_lib_read(substream, compat_ptr(buf), frames);
	293	if (err < 0)
	294	return err;
	295	/* copy the result */
	296	if (put_user(err, &data32->result))
	297	return -EFAULT;
	298	return 0;
	299	}
	300
	301
	302	/* snd_xfern needs remapping of bufs */
	303	struct sndrv_xfern32 {
	304	s32 result;
	305	u32 bufs; /* this is void *; /
	306	u32 frames;
	307	};
	308
	309	/*
	310	* xfern ioctl nees to copy (up to) 128 pointers on stack.
	311	* although we may pass the copied pointers through f_op->ioctl, but the ioctl
	312	* handler there expands again the same 128 pointers on stack, so it is better
	313	* to handle the function (calling pcm_readv/writev) directly in this handler.
	314	*/
	315	static int snd_pcm_ioctl_xfern_compat(snd_pcm_substream_t *substream,
	316	int dir, struct sndrv_xfern32 __user *data32)
	317	{
	318	compat_caddr_t buf;
	319	compat_caddr_t __user *bufptr;
	320	u32 frames;
321	void __user **bufs;
322	int err, ch, i;
323
324	if (! substream->runtime)
325	return -ENOTTY;
326	if (substream->stream != dir)
327	return -EINVAL;
328
329	if ((ch = substream->runtime->channels) > 128)
330	return -EINVAL;
331	if (get_user(buf, &data32->bufs) \|\|
332	get_user(frames, &data32->frames))
333	return -EFAULT;
334	bufptr = compat_ptr(buf);
335	bufs = kmalloc(sizeof(void __user ) ch, GFP_KERNEL);
336	if (bufs == NULL)
337	return -ENOMEM;
338	for (i = 0; i < ch; i++) {
339	u32 ptr;
340	if (get_user(ptr, bufptr)) {
341	kfree(bufs);
342	return -EFAULT;
343	}
344	bufs[ch] = compat_ptr(ptr);
345	bufptr++;
346	}
347	if (dir == SNDRV_PCM_STREAM_PLAYBACK)
348	err = snd_pcm_lib_writev(substream, bufs, frames);
349	else
350	err = snd_pcm_lib_readv(substream, bufs, frames);
351	if (err >= 0) {
352	if (put_user(err, &data32->result))
353	err = -EFAULT;
354	}
355	kfree(bufs);
356	return err;
357	}
358
359
360	struct sndrv_pcm_mmap_status32 {
361	s32 state;
362	s32 pad1;
363	u32 hw_ptr;
364	struct compat_timespec tstamp;
365	s32 suspended_state;
366	} __attribute__((packed));
367
368	struct sndrv_pcm_mmap_control32 {
369	u32 appl_ptr;
370	u32 avail_min;
371	};
372
373	struct sndrv_pcm_sync_ptr32 {
374	u32 flags;
375	union {
376	struct sndrv_pcm_mmap_status32 status;
377	unsigned char reserved[64];
378	} s;
379	union {
380	struct sndrv_pcm_mmap_control32 control;
381	unsigned char reserved[64];
382	} c;
383	} __attribute__((packed));
384
385	static int snd_pcm_ioctl_sync_ptr_compat(snd_pcm_substream_t *substream,
386	struct sndrv_pcm_sync_ptr32 __user *src)
387	{
388	snd_pcm_runtime_t *runtime = substream->runtime;
389	volatile struct sndrv_pcm_mmap_status *status;
390	volatile struct sndrv_pcm_mmap_control *control;
391	u32 sflags;
392	struct sndrv_pcm_mmap_control scontrol;
393	struct sndrv_pcm_mmap_status sstatus;
b2711310	394	snd_pcm_uframes_t boundary;
1da177e4 LT	395	int err;
	396
	397	snd_assert(runtime, return -EINVAL);
	398
	399	if (get_user(sflags, &src->flags) \|\|
	400	get_user(scontrol.appl_ptr, &src->c.control.appl_ptr) \|\|
	401	get_user(scontrol.avail_min, &src->c.control.avail_min))
	402	return -EFAULT;
	403	if (sflags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
	404	err = snd_pcm_hwsync(substream);
	405	if (err < 0)
	406	return err;
	407	}
	408	status = runtime->status;
	409	control = runtime->control;
b2711310	410	boundary = recalculate_boundary(runtime);
1da177e4	411	snd_pcm_stream_lock_irq(substream);
b2711310	412	/* FIXME: we should consider the boundary for the sync from app */
1da177e4 LT	413	if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL))
	414	control->appl_ptr = scontrol.appl_ptr;
	415	else
b2711310	416	scontrol.appl_ptr = control->appl_ptr % boundary;
1da177e4 LT	417	if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
	418	control->avail_min = scontrol.avail_min;
	419	else
	420	scontrol.avail_min = control->avail_min;
	421	sstatus.state = status->state;
b2711310	422	sstatus.hw_ptr = status->hw_ptr % boundary;
1da177e4 LT	423	sstatus.tstamp = status->tstamp;
	424	sstatus.suspended_state = status->suspended_state;
	425	snd_pcm_stream_unlock_irq(substream);
	426	if (put_user(sstatus.state, &src->s.status.state) \|\|
	427	put_user(sstatus.hw_ptr, &src->s.status.hw_ptr) \|\|
	428	put_user(sstatus.tstamp.tv_sec, &src->s.status.tstamp.tv_sec) \|\|
	429	put_user(sstatus.tstamp.tv_nsec, &src->s.status.tstamp.tv_nsec) \|\|
	430	put_user(sstatus.suspended_state, &src->s.status.suspended_state) \|\|
	431	put_user(scontrol.appl_ptr, &src->c.control.appl_ptr) \|\|
	432	put_user(scontrol.avail_min, &src->c.control.avail_min))
	433	return -EFAULT;
	434
	435	return 0;
	436	}
	437
	438
	439	/*
	440	*/
	441	enum {
	442	SNDRV_PCM_IOCTL_HW_REFINE32 = _IOWR('A', 0x10, struct sndrv_pcm_hw_params32),
	443	SNDRV_PCM_IOCTL_HW_PARAMS32 = _IOWR('A', 0x11, struct sndrv_pcm_hw_params32),
	444	SNDRV_PCM_IOCTL_SW_PARAMS32 = _IOWR('A', 0x13, struct sndrv_pcm_sw_params32),
	445	SNDRV_PCM_IOCTL_STATUS32 = _IOR('A', 0x20, struct sndrv_pcm_status32),
	446	SNDRV_PCM_IOCTL_DELAY32 = _IOR('A', 0x21, s32),
	447	SNDRV_PCM_IOCTL_CHANNEL_INFO32 = _IOR('A', 0x32, struct sndrv_pcm_channel_info32),
	448	SNDRV_PCM_IOCTL_REWIND32 = _IOW('A', 0x46, u32),
	449	SNDRV_PCM_IOCTL_FORWARD32 = _IOW('A', 0x49, u32),
	450	SNDRV_PCM_IOCTL_WRITEI_FRAMES32 = _IOW('A', 0x50, struct sndrv_xferi32),
	451	SNDRV_PCM_IOCTL_READI_FRAMES32 = _IOR('A', 0x51, struct sndrv_xferi32),
	452	SNDRV_PCM_IOCTL_WRITEN_FRAMES32 = _IOW('A', 0x52, struct sndrv_xfern32),
	453	SNDRV_PCM_IOCTL_READN_FRAMES32 = _IOR('A', 0x53, struct sndrv_xfern32),
	454	SNDRV_PCM_IOCTL_SYNC_PTR32 = _IOWR('A', 0x23, struct sndrv_pcm_sync_ptr32),
	455
	456	};
	457
	458	static long snd_pcm_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
	459	{
	460	snd_pcm_file_t *pcm_file;
	461	snd_pcm_substream_t *substream;
	462	void __user *argp = compat_ptr(arg);
	463
	464	pcm_file = file->private_data;
	465	if (! pcm_file)
	466	return -ENOTTY;
	467	substream = pcm_file->substream;
	468	if (! substream)
	469	return -ENOTTY;
	470
	471	/*
	472	* When PCM is used on 32bit mode, we need to disable
	473	* mmap of PCM status/control records because of the size
	474	* incompatibility.
	475	*/
	476	substream->no_mmap_ctrl = 1;
	477
	478	switch (cmd) {
	479	case SNDRV_PCM_IOCTL_PVERSION:
	480	case SNDRV_PCM_IOCTL_INFO:
	481	case SNDRV_PCM_IOCTL_TSTAMP:
	482	case SNDRV_PCM_IOCTL_HWSYNC:
	483	case SNDRV_PCM_IOCTL_PREPARE:
	484	case SNDRV_PCM_IOCTL_RESET:
	485	case SNDRV_PCM_IOCTL_START:
	486	case SNDRV_PCM_IOCTL_DROP:
487	case SNDRV_PCM_IOCTL_DRAIN:
488	case SNDRV_PCM_IOCTL_PAUSE:
489	case SNDRV_PCM_IOCTL_HW_FREE:
490	case SNDRV_PCM_IOCTL_RESUME:
491	case SNDRV_PCM_IOCTL_XRUN:
492	case SNDRV_PCM_IOCTL_LINK:
493	case SNDRV_PCM_IOCTL_UNLINK:
494	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
495	return snd_pcm_playback_ioctl1(substream, cmd, argp);
496	else
497	return snd_pcm_capture_ioctl1(substream, cmd, argp);
498	case SNDRV_PCM_IOCTL_HW_REFINE32:
499	return snd_pcm_ioctl_hw_params_compat(substream, 1, argp);
500	case SNDRV_PCM_IOCTL_HW_PARAMS32:
501	return snd_pcm_ioctl_hw_params_compat(substream, 0, argp);
502	case SNDRV_PCM_IOCTL_SW_PARAMS32:
503	return snd_pcm_ioctl_sw_params_compat(substream, argp);
504	case SNDRV_PCM_IOCTL_STATUS32:
505	return snd_pcm_status_user_compat(substream, argp);
506	case SNDRV_PCM_IOCTL_SYNC_PTR32:
507	return snd_pcm_ioctl_sync_ptr_compat(substream, argp);
508	case SNDRV_PCM_IOCTL_CHANNEL_INFO32:
509	return snd_pcm_ioctl_channel_info_compat(substream, argp);
510	case SNDRV_PCM_IOCTL_WRITEI_FRAMES32:
511	return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
512	case SNDRV_PCM_IOCTL_READI_FRAMES32:
513	return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
514	case SNDRV_PCM_IOCTL_WRITEN_FRAMES32:
515	return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
516	case SNDRV_PCM_IOCTL_READN_FRAMES32:
517	return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
518	case SNDRV_PCM_IOCTL_DELAY32:
519	return snd_pcm_ioctl_delay_compat(substream, argp);
520	case SNDRV_PCM_IOCTL_REWIND32:
521	return snd_pcm_ioctl_rewind_compat(substream, argp);
522	case SNDRV_PCM_IOCTL_FORWARD32:
523	return snd_pcm_ioctl_forward_compat(substream, argp);
524	}
525
526	return -ENOIOCTLCMD;
527	}