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