1 1a59d1b8SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-or-later
2 1da177e4SLinus Torvalds /*
3 1da177e4SLinus Torvalds * 32bit -> 64bit ioctl wrapper for hwdep API
4 1da177e4SLinus Torvalds * Copyright (c) by Takashi Iwai <tiwai@suse.de>
5 1da177e4SLinus Torvalds */
6 1da177e4SLinus Torvalds
7 1da177e4SLinus Torvalds /* This file is included from hwdep.c */
8 1da177e4SLinus Torvalds
9 1da177e4SLinus Torvalds #include <linux/compat.h>
10 1da177e4SLinus Torvalds
11 d9a98de2STakashi Iwai struct snd_hwdep_dsp_image32 {
12 1da177e4SLinus Torvalds u32 index;
13 1da177e4SLinus Torvalds unsigned char name[64];
14 1da177e4SLinus Torvalds u32 image; /* pointer */
15 1da177e4SLinus Torvalds u32 length;
16 1da177e4SLinus Torvalds u32 driver_data;
17 1da177e4SLinus Torvalds } /* don't set packed attribute here */;
18 1da177e4SLinus Torvalds
snd_hwdep_dsp_load_compat(struct snd_hwdep * hw,struct snd_hwdep_dsp_image32 __user * src)19 d9a98de2STakashi Iwai static int snd_hwdep_dsp_load_compat(struct snd_hwdep *hw,
20 d9a98de2STakashi Iwai struct snd_hwdep_dsp_image32 __user *src)
21 1da177e4SLinus Torvalds {
22 *18d122c0SArnd Bergmann struct snd_hwdep_dsp_image info = {};
23 1da177e4SLinus Torvalds compat_caddr_t ptr;
24 1da177e4SLinus Torvalds
25 *18d122c0SArnd Bergmann if (copy_from_user(&info, src, 4 + 64) ||
26 *18d122c0SArnd Bergmann get_user(ptr, &src->image) ||
27 *18d122c0SArnd Bergmann get_user(info.length, &src->length) ||
28 *18d122c0SArnd Bergmann get_user(info.driver_data, &src->driver_data))
29 *18d122c0SArnd Bergmann return -EFAULT;
30 *18d122c0SArnd Bergmann info.image = compat_ptr(ptr);
31 1da177e4SLinus Torvalds
32 *18d122c0SArnd Bergmann return snd_hwdep_dsp_load(hw, &info);
33 1da177e4SLinus Torvalds }
34 1da177e4SLinus Torvalds
35 1da177e4SLinus Torvalds enum {
36 d9a98de2STakashi Iwai SNDRV_HWDEP_IOCTL_DSP_LOAD32 = _IOW('H', 0x03, struct snd_hwdep_dsp_image32)
37 1da177e4SLinus Torvalds };
38 1da177e4SLinus Torvalds
snd_hwdep_ioctl_compat(struct file * file,unsigned int cmd,unsigned long arg)39 d9a98de2STakashi Iwai static long snd_hwdep_ioctl_compat(struct file * file, unsigned int cmd,
40 d9a98de2STakashi Iwai unsigned long arg)
41 1da177e4SLinus Torvalds {
42 d9a98de2STakashi Iwai struct snd_hwdep *hw = file->private_data;
43 1da177e4SLinus Torvalds void __user *argp = compat_ptr(arg);
44 1da177e4SLinus Torvalds switch (cmd) {
45 1da177e4SLinus Torvalds case SNDRV_HWDEP_IOCTL_PVERSION:
46 1da177e4SLinus Torvalds case SNDRV_HWDEP_IOCTL_INFO:
47 1da177e4SLinus Torvalds case SNDRV_HWDEP_IOCTL_DSP_STATUS:
48 1da177e4SLinus Torvalds return snd_hwdep_ioctl(file, cmd, (unsigned long)argp);
49 1da177e4SLinus Torvalds case SNDRV_HWDEP_IOCTL_DSP_LOAD32:
50 1da177e4SLinus Torvalds return snd_hwdep_dsp_load_compat(hw, argp);
51 1da177e4SLinus Torvalds }
52 1da177e4SLinus Torvalds if (hw->ops.ioctl_compat)
53 1da177e4SLinus Torvalds return hw->ops.ioctl_compat(hw, file, cmd, arg);
54 1da177e4SLinus Torvalds return -ENOIOCTLCMD;
55 1da177e4SLinus Torvalds }
56