// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *   32bit -> 64bit ioctl wrapper for hwdep API
 *   Copyright (c) by Takashi Iwai <tiwai@suse.de>
 */

/* This file is included from hwdep.c */

#include <linux/compat.h>

struct snd_hwdep_dsp_image32 {
        u32 index;
        unsigned char name[64];
        u32 image;      /* pointer */
        u32 length;
        u32 driver_data;
} /* don't set packed attribute here */;

static int snd_hwdep_dsp_load_compat(struct snd_hwdep *hw,
                                     struct snd_hwdep_dsp_image32 __user *src)
{
        struct snd_hwdep_dsp_image info = {};
        compat_caddr_t ptr;

        if (copy_from_user(&info, src, 4 + 64) ||
            get_user(ptr, &src->image) ||
            get_user(info.length, &src->length) ||
            get_user(info.driver_data, &src->driver_data))
                return -EFAULT;
        info.image = compat_ptr(ptr);

        return snd_hwdep_dsp_load(hw, &info);
}

enum {
        SNDRV_HWDEP_IOCTL_DSP_LOAD32   = _IOW('H', 0x03, struct snd_hwdep_dsp_image32)
};

static long snd_hwdep_ioctl_compat(struct file * file, unsigned int cmd,
                                   unsigned long arg)
{
        struct snd_hwdep *hw = file->private_data;
        void __user *argp = compat_ptr(arg);
        switch (cmd) {
        case SNDRV_HWDEP_IOCTL_PVERSION:
        case SNDRV_HWDEP_IOCTL_INFO:
        case SNDRV_HWDEP_IOCTL_DSP_STATUS:
                return snd_hwdep_ioctl(file, cmd, (unsigned long)argp);
        case SNDRV_HWDEP_IOCTL_DSP_LOAD32:
                return snd_hwdep_dsp_load_compat(hw, argp);
        }
        if (hw->ops.ioctl_compat)
                return hw->ops.ioctl_compat(hw, file, cmd, arg);
        return -ENOIOCTLCMD;
}