11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * 32bit -> 64bit ioctl wrapper for raw MIDI API 31da177e4SLinus Torvalds * Copyright (c) by Takashi Iwai <tiwai@suse.de> 41da177e4SLinus Torvalds * 51da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or modify 61da177e4SLinus Torvalds * it under the terms of the GNU General Public License as published by 71da177e4SLinus Torvalds * the Free Software Foundation; either version 2 of the License, or 81da177e4SLinus Torvalds * (at your option) any later version. 91da177e4SLinus Torvalds * 101da177e4SLinus Torvalds * This program is distributed in the hope that it will be useful, 111da177e4SLinus Torvalds * but WITHOUT ANY WARRANTY; without even the implied warranty of 121da177e4SLinus Torvalds * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 131da177e4SLinus Torvalds * GNU General Public License for more details. 141da177e4SLinus Torvalds * 151da177e4SLinus Torvalds * You should have received a copy of the GNU General Public License 161da177e4SLinus Torvalds * along with this program; if not, write to the Free Software 171da177e4SLinus Torvalds * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 181da177e4SLinus Torvalds * 191da177e4SLinus Torvalds */ 201da177e4SLinus Torvalds 211da177e4SLinus Torvalds /* This file included from rawmidi.c */ 221da177e4SLinus Torvalds 231da177e4SLinus Torvalds #include <linux/compat.h> 241da177e4SLinus Torvalds 2548c9d417STakashi Iwai struct snd_rawmidi_params32 { 261da177e4SLinus Torvalds s32 stream; 271da177e4SLinus Torvalds u32 buffer_size; 281da177e4SLinus Torvalds u32 avail_min; 291da177e4SLinus Torvalds unsigned int no_active_sensing; /* avoid bit-field */ 301da177e4SLinus Torvalds unsigned char reserved[16]; 311da177e4SLinus Torvalds } __attribute__((packed)); 321da177e4SLinus Torvalds 3348c9d417STakashi Iwai static int snd_rawmidi_ioctl_params_compat(struct snd_rawmidi_file *rfile, 3448c9d417STakashi Iwai struct snd_rawmidi_params32 __user *src) 351da177e4SLinus Torvalds { 3648c9d417STakashi Iwai struct snd_rawmidi_params params; 371da177e4SLinus Torvalds unsigned int val; 381da177e4SLinus Torvalds 391da177e4SLinus Torvalds if (get_user(params.stream, &src->stream) || 401da177e4SLinus Torvalds get_user(params.buffer_size, &src->buffer_size) || 411da177e4SLinus Torvalds get_user(params.avail_min, &src->avail_min) || 421da177e4SLinus Torvalds get_user(val, &src->no_active_sensing)) 431da177e4SLinus Torvalds return -EFAULT; 441da177e4SLinus Torvalds params.no_active_sensing = val; 451da177e4SLinus Torvalds switch (params.stream) { 461da177e4SLinus Torvalds case SNDRV_RAWMIDI_STREAM_OUTPUT: 478a56ef4fSTakashi Iwai if (!rfile->output) 488a56ef4fSTakashi Iwai return -EINVAL; 491da177e4SLinus Torvalds return snd_rawmidi_output_params(rfile->output, ¶ms); 501da177e4SLinus Torvalds case SNDRV_RAWMIDI_STREAM_INPUT: 518a56ef4fSTakashi Iwai if (!rfile->input) 528a56ef4fSTakashi Iwai return -EINVAL; 531da177e4SLinus Torvalds return snd_rawmidi_input_params(rfile->input, ¶ms); 541da177e4SLinus Torvalds } 551da177e4SLinus Torvalds return -EINVAL; 561da177e4SLinus Torvalds } 571da177e4SLinus Torvalds 5848c9d417STakashi Iwai struct snd_rawmidi_status32 { 591da177e4SLinus Torvalds s32 stream; 601da177e4SLinus Torvalds struct compat_timespec tstamp; 611da177e4SLinus Torvalds u32 avail; 621da177e4SLinus Torvalds u32 xruns; 631da177e4SLinus Torvalds unsigned char reserved[16]; 641da177e4SLinus Torvalds } __attribute__((packed)); 651da177e4SLinus Torvalds 6648c9d417STakashi Iwai static int snd_rawmidi_ioctl_status_compat(struct snd_rawmidi_file *rfile, 6748c9d417STakashi Iwai struct snd_rawmidi_status32 __user *src) 681da177e4SLinus Torvalds { 691da177e4SLinus Torvalds int err; 7048c9d417STakashi Iwai struct snd_rawmidi_status status; 711da177e4SLinus Torvalds 721da177e4SLinus Torvalds if (get_user(status.stream, &src->stream)) 731da177e4SLinus Torvalds return -EFAULT; 741da177e4SLinus Torvalds 751da177e4SLinus Torvalds switch (status.stream) { 761da177e4SLinus Torvalds case SNDRV_RAWMIDI_STREAM_OUTPUT: 778a56ef4fSTakashi Iwai if (!rfile->output) 788a56ef4fSTakashi Iwai return -EINVAL; 791da177e4SLinus Torvalds err = snd_rawmidi_output_status(rfile->output, &status); 801da177e4SLinus Torvalds break; 811da177e4SLinus Torvalds case SNDRV_RAWMIDI_STREAM_INPUT: 828a56ef4fSTakashi Iwai if (!rfile->input) 838a56ef4fSTakashi Iwai return -EINVAL; 841da177e4SLinus Torvalds err = snd_rawmidi_input_status(rfile->input, &status); 851da177e4SLinus Torvalds break; 861da177e4SLinus Torvalds default: 871da177e4SLinus Torvalds return -EINVAL; 881da177e4SLinus Torvalds } 891da177e4SLinus Torvalds if (err < 0) 901da177e4SLinus Torvalds return err; 911da177e4SLinus Torvalds 92dd7e3f80STakashi Iwai if (compat_put_timespec(&status.tstamp, &src->tstamp) || 931da177e4SLinus Torvalds put_user(status.avail, &src->avail) || 941da177e4SLinus Torvalds put_user(status.xruns, &src->xruns)) 951da177e4SLinus Torvalds return -EFAULT; 961da177e4SLinus Torvalds 971da177e4SLinus Torvalds return 0; 981da177e4SLinus Torvalds } 991da177e4SLinus Torvalds 1002251fbbcSTakashi Iwai #ifdef CONFIG_X86_X32 1012251fbbcSTakashi Iwai /* X32 ABI has 64bit timespec and 64bit alignment */ 1022251fbbcSTakashi Iwai struct snd_rawmidi_status_x32 { 1032251fbbcSTakashi Iwai s32 stream; 1042251fbbcSTakashi Iwai u32 rsvd; /* alignment */ 1052251fbbcSTakashi Iwai struct timespec tstamp; 1062251fbbcSTakashi Iwai u32 avail; 1072251fbbcSTakashi Iwai u32 xruns; 1082251fbbcSTakashi Iwai unsigned char reserved[16]; 1092251fbbcSTakashi Iwai } __attribute__((packed)); 1102251fbbcSTakashi Iwai 1112251fbbcSTakashi Iwai #define put_timespec(src, dst) copy_to_user(dst, src, sizeof(*dst)) 1122251fbbcSTakashi Iwai 1132251fbbcSTakashi Iwai static int snd_rawmidi_ioctl_status_x32(struct snd_rawmidi_file *rfile, 1142251fbbcSTakashi Iwai struct snd_rawmidi_status_x32 __user *src) 1152251fbbcSTakashi Iwai { 1162251fbbcSTakashi Iwai int err; 1172251fbbcSTakashi Iwai struct snd_rawmidi_status status; 1182251fbbcSTakashi Iwai 1192251fbbcSTakashi Iwai if (get_user(status.stream, &src->stream)) 1202251fbbcSTakashi Iwai return -EFAULT; 1212251fbbcSTakashi Iwai 1222251fbbcSTakashi Iwai switch (status.stream) { 1232251fbbcSTakashi Iwai case SNDRV_RAWMIDI_STREAM_OUTPUT: 1248a56ef4fSTakashi Iwai if (!rfile->output) 1258a56ef4fSTakashi Iwai return -EINVAL; 1262251fbbcSTakashi Iwai err = snd_rawmidi_output_status(rfile->output, &status); 1272251fbbcSTakashi Iwai break; 1282251fbbcSTakashi Iwai case SNDRV_RAWMIDI_STREAM_INPUT: 1298a56ef4fSTakashi Iwai if (!rfile->input) 1308a56ef4fSTakashi Iwai return -EINVAL; 1312251fbbcSTakashi Iwai err = snd_rawmidi_input_status(rfile->input, &status); 1322251fbbcSTakashi Iwai break; 1332251fbbcSTakashi Iwai default: 1342251fbbcSTakashi Iwai return -EINVAL; 1352251fbbcSTakashi Iwai } 1362251fbbcSTakashi Iwai if (err < 0) 1372251fbbcSTakashi Iwai return err; 1382251fbbcSTakashi Iwai 1392251fbbcSTakashi Iwai if (put_timespec(&status.tstamp, &src->tstamp) || 1402251fbbcSTakashi Iwai put_user(status.avail, &src->avail) || 1412251fbbcSTakashi Iwai put_user(status.xruns, &src->xruns)) 1422251fbbcSTakashi Iwai return -EFAULT; 1432251fbbcSTakashi Iwai 1442251fbbcSTakashi Iwai return 0; 1452251fbbcSTakashi Iwai } 1462251fbbcSTakashi Iwai #endif /* CONFIG_X86_X32 */ 1472251fbbcSTakashi Iwai 1481da177e4SLinus Torvalds enum { 14948c9d417STakashi Iwai SNDRV_RAWMIDI_IOCTL_PARAMS32 = _IOWR('W', 0x10, struct snd_rawmidi_params32), 15048c9d417STakashi Iwai SNDRV_RAWMIDI_IOCTL_STATUS32 = _IOWR('W', 0x20, struct snd_rawmidi_status32), 1512251fbbcSTakashi Iwai #ifdef CONFIG_X86_X32 1522251fbbcSTakashi Iwai SNDRV_RAWMIDI_IOCTL_STATUS_X32 = _IOWR('W', 0x20, struct snd_rawmidi_status_x32), 1532251fbbcSTakashi Iwai #endif /* CONFIG_X86_X32 */ 1541da177e4SLinus Torvalds }; 1551da177e4SLinus Torvalds 1561da177e4SLinus Torvalds static long snd_rawmidi_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg) 1571da177e4SLinus Torvalds { 15848c9d417STakashi Iwai struct snd_rawmidi_file *rfile; 1591da177e4SLinus Torvalds void __user *argp = compat_ptr(arg); 1601da177e4SLinus Torvalds 1611da177e4SLinus Torvalds rfile = file->private_data; 1621da177e4SLinus Torvalds switch (cmd) { 1631da177e4SLinus Torvalds case SNDRV_RAWMIDI_IOCTL_PVERSION: 1641da177e4SLinus Torvalds case SNDRV_RAWMIDI_IOCTL_INFO: 1651da177e4SLinus Torvalds case SNDRV_RAWMIDI_IOCTL_DROP: 1661da177e4SLinus Torvalds case SNDRV_RAWMIDI_IOCTL_DRAIN: 1671da177e4SLinus Torvalds return snd_rawmidi_ioctl(file, cmd, (unsigned long)argp); 1681da177e4SLinus Torvalds case SNDRV_RAWMIDI_IOCTL_PARAMS32: 1691da177e4SLinus Torvalds return snd_rawmidi_ioctl_params_compat(rfile, argp); 1701da177e4SLinus Torvalds case SNDRV_RAWMIDI_IOCTL_STATUS32: 1711da177e4SLinus Torvalds return snd_rawmidi_ioctl_status_compat(rfile, argp); 1722251fbbcSTakashi Iwai #ifdef CONFIG_X86_X32 1732251fbbcSTakashi Iwai case SNDRV_RAWMIDI_IOCTL_STATUS_X32: 1742251fbbcSTakashi Iwai return snd_rawmidi_ioctl_status_x32(rfile, argp); 1752251fbbcSTakashi Iwai #endif /* CONFIG_X86_X32 */ 1761da177e4SLinus Torvalds } 1771da177e4SLinus Torvalds return -ENOIOCTLCMD; 1781da177e4SLinus Torvalds } 179