/*
 *   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;
        int err;

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

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;
}

#ifdef CONFIG_X86_X32
/* X32 ABI has the same struct as x86-64 for snd_pcm_channel_info */
static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
                                     struct snd_pcm_channel_info __user *src);
#define snd_pcm_ioctl_channel_info_x32(s, p)    \
        snd_pcm_channel_info_user(s, p)
#endif /* CONFIG_X86_X32 */

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 audio_tstamp_data;
        struct compat_timespec audio_tstamp;
        struct compat_timespec driver_tstamp;
        u32 audio_tstamp_accuracy;
        unsigned char reserved[52-2*sizeof(struct compat_timespec)];
} __attribute__((packed));


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

        memset(&status, 0, sizeof(status));
        /*
         * with extension, parameters are read/write,
         * get audio_tstamp_data from user,
         * ignore rest of status structure
         */
        if (ext && get_user(status.audio_tstamp_data,
                                (u32 __user *)(&src->audio_tstamp_data)))
                return -EFAULT;
        err = snd_pcm_status(substream, &status);
        if (err < 0)
                return err;

        if (clear_user(src, sizeof(*src)))
                return -EFAULT;
        if (put_user(status.state, &src->state) ||
            compat_put_timespec(&status.trigger_tstamp, &src->trigger_tstamp) ||
            compat_put_timespec(&status.tstamp, &src->tstamp) ||
            put_user(status.appl_ptr, &src->appl_ptr) ||
            put_user(status.hw_ptr, &src->hw_ptr) ||
            put_user(status.delay, &src->delay) ||
            put_user(status.avail, &src->avail) ||
            put_user(status.avail_max, &src->avail_max) ||
            put_user(status.overrange, &src->overrange) ||
            put_user(status.suspended_state, &src->suspended_state) ||
            put_user(status.audio_tstamp_data, &src->audio_tstamp_data) ||
            compat_put_timespec(&status.audio_tstamp, &src->audio_tstamp) ||
            compat_put_timespec(&status.driver_tstamp, &src->driver_tstamp) ||
            put_user(status.audio_tstamp_accuracy, &src->audio_tstamp_accuracy))
                return -EFAULT;

        return err;
}

#ifdef CONFIG_X86_X32
/* X32 ABI has 64bit timespec and 64bit alignment */
struct snd_pcm_status_x32 {
        s32 state;
        u32 rsvd; /* alignment */
        struct timespec trigger_tstamp;
        struct timespec tstamp;
        u32 appl_ptr;
        u32 hw_ptr;
        s32 delay;
        u32 avail;
        u32 avail_max;
        u32 overrange;
        s32 suspended_state;
        u32 audio_tstamp_data;
        struct timespec audio_tstamp;
        struct timespec driver_tstamp;
        u32 audio_tstamp_accuracy;
        unsigned char reserved[52-2*sizeof(struct timespec)];
} __packed;

#define put_timespec(src, dst) copy_to_user(dst, src, sizeof(*dst))

static int snd_pcm_status_user_x32(struct snd_pcm_substream *substream,
                                   struct snd_pcm_status_x32 __user *src,
                                   bool ext)
{
        struct snd_pcm_status status;
        int err;

        memset(&status, 0, sizeof(status));
        /*
         * with extension, parameters are read/write,
         * get audio_tstamp_data from user,
         * ignore rest of status structure
         */
        if (ext && get_user(status.audio_tstamp_data,
                                (u32 __user *)(&src->audio_tstamp_data)))
                return -EFAULT;
        err = snd_pcm_status(substream, &status);
        if (err < 0)
                return err;

        if (clear_user(src, sizeof(*src)))
                return -EFAULT;
        if (put_user(status.state, &src->state) ||
            put_timespec(&status.trigger_tstamp, &src->trigger_tstamp) ||
            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) ||
            put_user(status.audio_tstamp_data, &src->audio_tstamp_data) ||
            put_timespec(&status.audio_tstamp, &src->audio_tstamp) ||
            put_timespec(&status.driver_tstamp, &src->driver_tstamp) ||
            put_user(status.audio_tstamp_accuracy, &src->audio_tstamp_accuracy))
                return -EFAULT;

        return err;
}
#endif /* CONFIG_X86_X32 */

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

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

        data = kmalloc(sizeof(*data), GFP_KERNEL);
        if (!data)
                return -ENOMEM;

        /* only fifo_size (RO from userspace) is different, so just copy all */
        if (copy_from_user(data, data32, sizeof(*data32))) {
                err = -EFAULT;
                goto error;
        }

        if (refine)
                err = snd_pcm_hw_refine(substream, data);
        else
                err = snd_pcm_hw_params(substream, data);
        if (err < 0)
                goto error;
        if (copy_to_user(data32, data, sizeof(*data32)) ||
            put_user(data->fifo_size, &data32->fifo_size)) {
                err = -EFAULT;
                goto error;
        }

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


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

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

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

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

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


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

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

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

        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;
}

#ifdef CONFIG_X86_X32
/* X32 ABI has 64bit timespec and 64bit alignment */
struct snd_pcm_mmap_status_x32 {
        s32 state;
        s32 pad1;
        u32 hw_ptr;
        u32 pad2; /* alignment */
        struct timespec tstamp;
        s32 suspended_state;
        s32 pad3;
        struct timespec audio_tstamp;
} __packed;

struct snd_pcm_mmap_control_x32 {
        u32 appl_ptr;
        u32 avail_min;
};

struct snd_pcm_sync_ptr_x32 {
        u32 flags;
        u32 rsvd; /* alignment */
        union {
                struct snd_pcm_mmap_status_x32 status;
                unsigned char reserved[64];
        } s;
        union {
                struct snd_pcm_mmap_control_x32 control;
                unsigned char reserved[64];
        } c;
} __packed;

static int snd_pcm_ioctl_sync_ptr_x32(struct snd_pcm_substream *substream,
                                      struct snd_pcm_sync_ptr_x32 __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) ||
            put_timespec(&sstatus.tstamp, &src->s.status.tstamp) ||
            put_user(sstatus.suspended_state, &src->s.status.suspended_state) ||
            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;
}
#endif /* CONFIG_X86_X32 */

/*
 */
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_STATUS_EXT32 = _IOWR('A', 0x24, 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),
#ifdef CONFIG_X86_X32
        SNDRV_PCM_IOCTL_CHANNEL_INFO_X32 = _IOR('A', 0x32, struct snd_pcm_channel_info),
        SNDRV_PCM_IOCTL_STATUS_X32 = _IOR('A', 0x20, struct snd_pcm_status_x32),
        SNDRV_PCM_IOCTL_STATUS_EXT_X32 = _IOWR('A', 0x24, struct snd_pcm_status_x32),
        SNDRV_PCM_IOCTL_SYNC_PTR_X32 = _IOWR('A', 0x23, struct snd_pcm_sync_ptr_x32),
#endif /* CONFIG_X86_X32 */
};

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_USER_PVERSION:
        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:
                return snd_pcm_common_ioctl(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, false);
        case SNDRV_PCM_IOCTL_STATUS_EXT32:
                return snd_pcm_status_user_compat(substream, argp, true);
        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);
#ifdef CONFIG_X86_X32
        case SNDRV_PCM_IOCTL_STATUS_X32:
                return snd_pcm_status_user_x32(substream, argp, false);
        case SNDRV_PCM_IOCTL_STATUS_EXT_X32:
                return snd_pcm_status_user_x32(substream, argp, true);
        case SNDRV_PCM_IOCTL_SYNC_PTR_X32:
                return snd_pcm_ioctl_sync_ptr_x32(substream, argp);
        case SNDRV_PCM_IOCTL_CHANNEL_INFO_X32:
                return snd_pcm_ioctl_channel_info_x32(substream, argp);
#endif /* CONFIG_X86_X32 */
        }

        return -ENOIOCTLCMD;
}