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
25 struct 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
snd_timer_user_info_compat(struct file * file,struct snd_timer_info32 __user * _info)35 static 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
60 struct 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
snd_timer_user_status_compat(struct file * file,struct snd_timer_status32 __user * _status)69 static 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
94 enum {
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
snd_timer_user_ioctl_compat(struct file * file,unsigned int cmd,unsigned long arg)99 static 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