Root/sound/core/timer_compat.c

1/*
2 * 32bit -> 64bit ioctl wrapper for timer 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 timer.c */
22
23#include <linux/compat.h>
24
25struct snd_timer_info32 {
26    u32 flags;
27    s32 card;
28    unsigned char id[64];
29    unsigned char name[80];
30    u32 reserved0;
31    u32 resolution;
32    unsigned char reserved[64];
33};
34
35static int snd_timer_user_info_compat(struct file *file,
36                      struct snd_timer_info32 __user *_info)
37{
38    struct snd_timer_user *tu;
39    struct snd_timer_info32 info;
40    struct snd_timer *t;
41
42    tu = file->private_data;
43    if (snd_BUG_ON(!tu->timeri))
44        return -ENXIO;
45    t = tu->timeri->timer;
46    if (snd_BUG_ON(!t))
47        return -ENXIO;
48    memset(&info, 0, sizeof(info));
49    info.card = t->card ? t->card->number : -1;
50    if (t->hw.flags & SNDRV_TIMER_HW_SLAVE)
51        info.flags |= SNDRV_TIMER_FLG_SLAVE;
52    strlcpy(info.id, t->id, sizeof(info.id));
53    strlcpy(info.name, t->name, sizeof(info.name));
54    info.resolution = t->hw.resolution;
55    if (copy_to_user(_info, &info, sizeof(*_info)))
56        return -EFAULT;
57    return 0;
58}
59
60struct snd_timer_status32 {
61    struct compat_timespec tstamp;
62    u32 resolution;
63    u32 lost;
64    u32 overrun;
65    u32 queue;
66    unsigned char reserved[64];
67};
68
69static int snd_timer_user_status_compat(struct file *file,
70                    struct snd_timer_status32 __user *_status)
71{
72    struct snd_timer_user *tu;
73    struct snd_timer_status status;
74    
75    tu = file->private_data;
76    if (snd_BUG_ON(!tu->timeri))
77        return -ENXIO;
78    memset(&status, 0, sizeof(status));
79    status.tstamp = tu->tstamp;
80    status.resolution = snd_timer_resolution(tu->timeri);
81    status.lost = tu->timeri->lost;
82    status.overrun = tu->overrun;
83    spin_lock_irq(&tu->qlock);
84    status.queue = tu->qused;
85    spin_unlock_irq(&tu->qlock);
86    if (copy_to_user(_status, &status, sizeof(status)))
87        return -EFAULT;
88    return 0;
89}
90
91/*
92 */
93
94enum {
95    SNDRV_TIMER_IOCTL_INFO32 = _IOR('T', 0x11, struct snd_timer_info32),
96    SNDRV_TIMER_IOCTL_STATUS32 = _IOW('T', 0x14, struct snd_timer_status32),
97};
98
99static long snd_timer_user_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
100{
101    void __user *argp = compat_ptr(arg);
102
103    switch (cmd) {
104    case SNDRV_TIMER_IOCTL_PVERSION:
105    case SNDRV_TIMER_IOCTL_TREAD:
106    case SNDRV_TIMER_IOCTL_GINFO:
107    case SNDRV_TIMER_IOCTL_GPARAMS:
108    case SNDRV_TIMER_IOCTL_GSTATUS:
109    case SNDRV_TIMER_IOCTL_SELECT:
110    case SNDRV_TIMER_IOCTL_PARAMS:
111    case SNDRV_TIMER_IOCTL_START:
112    case SNDRV_TIMER_IOCTL_START_OLD:
113    case SNDRV_TIMER_IOCTL_STOP:
114    case SNDRV_TIMER_IOCTL_STOP_OLD:
115    case SNDRV_TIMER_IOCTL_CONTINUE:
116    case SNDRV_TIMER_IOCTL_CONTINUE_OLD:
117    case SNDRV_TIMER_IOCTL_PAUSE:
118    case SNDRV_TIMER_IOCTL_PAUSE_OLD:
119    case SNDRV_TIMER_IOCTL_NEXT_DEVICE:
120        return snd_timer_user_ioctl(file, cmd, (unsigned long)argp);
121    case SNDRV_TIMER_IOCTL_INFO32:
122        return snd_timer_user_info_compat(file, argp);
123    case SNDRV_TIMER_IOCTL_STATUS32:
124        return snd_timer_user_status_compat(file, argp);
125    }
126    return -ENOIOCTLCMD;
127}
128

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