1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * 32bit -> 64bit ioctl wrapper for hwdep API
4*4882a593Smuzhiyun * Copyright (c) by Takashi Iwai <tiwai@suse.de>
5*4882a593Smuzhiyun */
6*4882a593Smuzhiyun
7*4882a593Smuzhiyun /* This file is included from hwdep.c */
8*4882a593Smuzhiyun
9*4882a593Smuzhiyun #include <linux/compat.h>
10*4882a593Smuzhiyun
11*4882a593Smuzhiyun struct snd_hwdep_dsp_image32 {
12*4882a593Smuzhiyun u32 index;
13*4882a593Smuzhiyun unsigned char name[64];
14*4882a593Smuzhiyun u32 image; /* pointer */
15*4882a593Smuzhiyun u32 length;
16*4882a593Smuzhiyun u32 driver_data;
17*4882a593Smuzhiyun } /* don't set packed attribute here */;
18*4882a593Smuzhiyun
snd_hwdep_dsp_load_compat(struct snd_hwdep * hw,struct snd_hwdep_dsp_image32 __user * src)19*4882a593Smuzhiyun static int snd_hwdep_dsp_load_compat(struct snd_hwdep *hw,
20*4882a593Smuzhiyun struct snd_hwdep_dsp_image32 __user *src)
21*4882a593Smuzhiyun {
22*4882a593Smuzhiyun struct snd_hwdep_dsp_image info = {};
23*4882a593Smuzhiyun compat_caddr_t ptr;
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun if (copy_from_user(&info, src, 4 + 64) ||
26*4882a593Smuzhiyun get_user(ptr, &src->image) ||
27*4882a593Smuzhiyun get_user(info.length, &src->length) ||
28*4882a593Smuzhiyun get_user(info.driver_data, &src->driver_data))
29*4882a593Smuzhiyun return -EFAULT;
30*4882a593Smuzhiyun info.image = compat_ptr(ptr);
31*4882a593Smuzhiyun
32*4882a593Smuzhiyun return snd_hwdep_dsp_load(hw, &info);
33*4882a593Smuzhiyun }
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun enum {
36*4882a593Smuzhiyun SNDRV_HWDEP_IOCTL_DSP_LOAD32 = _IOW('H', 0x03, struct snd_hwdep_dsp_image32)
37*4882a593Smuzhiyun };
38*4882a593Smuzhiyun
snd_hwdep_ioctl_compat(struct file * file,unsigned int cmd,unsigned long arg)39*4882a593Smuzhiyun static long snd_hwdep_ioctl_compat(struct file * file, unsigned int cmd,
40*4882a593Smuzhiyun unsigned long arg)
41*4882a593Smuzhiyun {
42*4882a593Smuzhiyun struct snd_hwdep *hw = file->private_data;
43*4882a593Smuzhiyun void __user *argp = compat_ptr(arg);
44*4882a593Smuzhiyun switch (cmd) {
45*4882a593Smuzhiyun case SNDRV_HWDEP_IOCTL_PVERSION:
46*4882a593Smuzhiyun case SNDRV_HWDEP_IOCTL_INFO:
47*4882a593Smuzhiyun case SNDRV_HWDEP_IOCTL_DSP_STATUS:
48*4882a593Smuzhiyun return snd_hwdep_ioctl(file, cmd, (unsigned long)argp);
49*4882a593Smuzhiyun case SNDRV_HWDEP_IOCTL_DSP_LOAD32:
50*4882a593Smuzhiyun return snd_hwdep_dsp_load_compat(hw, argp);
51*4882a593Smuzhiyun }
52*4882a593Smuzhiyun if (hw->ops.ioctl_compat)
53*4882a593Smuzhiyun return hw->ops.ioctl_compat(hw, file, cmd, arg);
54*4882a593Smuzhiyun return -ENOIOCTLCMD;
55*4882a593Smuzhiyun }
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