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 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 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 (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 */ 100 101 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 }; 108 109 static 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