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 (!tu->timeri)
44 return -EBADFD;
45 t = tu->timeri->timer;
46 if (!t)
47 return -EBADFD;
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_status32 status;
74
75 tu = file->private_data;
76 if (!tu->timeri)
77 return -EBADFD;
78 memset(&status, 0, sizeof(status));
79 status.tstamp.tv_sec = tu->tstamp.tv_sec;
80 status.tstamp.tv_nsec = tu->tstamp.tv_nsec;
81 status.resolution = snd_timer_resolution(tu->timeri);
82 status.lost = tu->timeri->lost;
83 status.overrun = tu->overrun;
84 spin_lock_irq(&tu->qlock);
85 status.queue = tu->qused;
86 spin_unlock_irq(&tu->qlock);
87 if (copy_to_user(_status, &status, sizeof(status)))
88 return -EFAULT;
89 return 0;
90 }
91
92 #ifdef CONFIG_X86_X32
93 /* X32 ABI has the same struct as x86-64 */
94 #define snd_timer_user_status_x32(file, s) \
95 snd_timer_user_status(file, s)
96 #endif /* CONFIG_X86_X32 */
97
98 /*
99 */
100
101 enum {
102 SNDRV_TIMER_IOCTL_INFO32 = _IOR('T', 0x11, struct snd_timer_info32),
103 SNDRV_TIMER_IOCTL_STATUS32 = _IOW('T', 0x14, struct snd_timer_status32),
104 #ifdef CONFIG_X86_X32
105 SNDRV_TIMER_IOCTL_STATUS_X32 = _IOW('T', 0x14, struct snd_timer_status),
106 #endif /* CONFIG_X86_X32 */
107 };
108
__snd_timer_user_ioctl_compat(struct file * file,unsigned int cmd,unsigned long arg)109 static long __snd_timer_user_ioctl_compat(struct file *file, unsigned int cmd,
110 unsigned long arg)
111 {
112 void __user *argp = compat_ptr(arg);
113
114 switch (cmd) {
115 case SNDRV_TIMER_IOCTL_PVERSION:
116 case SNDRV_TIMER_IOCTL_TREAD:
117 case SNDRV_TIMER_IOCTL_GINFO:
118 case SNDRV_TIMER_IOCTL_GPARAMS:
119 case SNDRV_TIMER_IOCTL_GSTATUS:
120 case SNDRV_TIMER_IOCTL_SELECT:
121 case SNDRV_TIMER_IOCTL_PARAMS:
122 case SNDRV_TIMER_IOCTL_START:
123 case SNDRV_TIMER_IOCTL_START_OLD:
124 case SNDRV_TIMER_IOCTL_STOP:
125 case SNDRV_TIMER_IOCTL_STOP_OLD:
126 case SNDRV_TIMER_IOCTL_CONTINUE:
127 case SNDRV_TIMER_IOCTL_CONTINUE_OLD:
128 case SNDRV_TIMER_IOCTL_PAUSE:
129 case SNDRV_TIMER_IOCTL_PAUSE_OLD:
130 case SNDRV_TIMER_IOCTL_NEXT_DEVICE:
131 return __snd_timer_user_ioctl(file, cmd, (unsigned long)argp);
132 case SNDRV_TIMER_IOCTL_INFO32:
133 return snd_timer_user_info_compat(file, argp);
134 case SNDRV_TIMER_IOCTL_STATUS32:
135 return snd_timer_user_status_compat(file, argp);
136 #ifdef CONFIG_X86_X32
137 case SNDRV_TIMER_IOCTL_STATUS_X32:
138 return snd_timer_user_status_x32(file, argp);
139 #endif /* CONFIG_X86_X32 */
140 }
141 return -ENOIOCTLCMD;
142 }
143
snd_timer_user_ioctl_compat(struct file * file,unsigned int cmd,unsigned long arg)144 static long snd_timer_user_ioctl_compat(struct file *file, unsigned int cmd,
145 unsigned long arg)
146 {
147 struct snd_timer_user *tu = file->private_data;
148 long ret;
149
150 mutex_lock(&tu->ioctl_lock);
151 ret = __snd_timer_user_ioctl_compat(file, cmd, arg);
152 mutex_unlock(&tu->ioctl_lock);
153 return ret;
154 }
155