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_status32 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.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
101enum {
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
109static long snd_timer_user_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
110{
111	void __user *argp = compat_ptr(arg);
112
113	switch (cmd) {
114	case SNDRV_TIMER_IOCTL_PVERSION:
115	case SNDRV_TIMER_IOCTL_TREAD:
116	case SNDRV_TIMER_IOCTL_GINFO:
117	case SNDRV_TIMER_IOCTL_GPARAMS:
118	case SNDRV_TIMER_IOCTL_GSTATUS:
119	case SNDRV_TIMER_IOCTL_SELECT:
120	case SNDRV_TIMER_IOCTL_PARAMS:
121	case SNDRV_TIMER_IOCTL_START:
122	case SNDRV_TIMER_IOCTL_START_OLD:
123	case SNDRV_TIMER_IOCTL_STOP:
124	case SNDRV_TIMER_IOCTL_STOP_OLD:
125	case SNDRV_TIMER_IOCTL_CONTINUE:
126	case SNDRV_TIMER_IOCTL_CONTINUE_OLD:
127	case SNDRV_TIMER_IOCTL_PAUSE:
128	case SNDRV_TIMER_IOCTL_PAUSE_OLD:
129	case SNDRV_TIMER_IOCTL_NEXT_DEVICE:
130		return snd_timer_user_ioctl(file, cmd, (unsigned long)argp);
131	case SNDRV_TIMER_IOCTL_INFO32:
132		return snd_timer_user_info_compat(file, argp);
133	case SNDRV_TIMER_IOCTL_STATUS32:
134		return snd_timer_user_status_compat(file, argp);
135#ifdef CONFIG_X86_X32
136	case SNDRV_TIMER_IOCTL_STATUS_X32:
137		return snd_timer_user_status_x32(file, argp);
138#endif /* CONFIG_X86_X32 */
139	}
140	return -ENOIOCTLCMD;
141}
142