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 251da177e4SLinus Torvalds struct sndrv_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 331da177e4SLinus Torvalds static int snd_rawmidi_ioctl_params_compat(snd_rawmidi_file_t *rfile, 341da177e4SLinus Torvalds struct sndrv_rawmidi_params32 __user *src) 351da177e4SLinus Torvalds { 361da177e4SLinus Torvalds snd_rawmidi_params_t params; 371da177e4SLinus Torvalds unsigned int val; 381da177e4SLinus Torvalds 391da177e4SLinus Torvalds if (rfile->output == NULL) 401da177e4SLinus Torvalds return -EINVAL; 411da177e4SLinus Torvalds if (get_user(params.stream, &src->stream) || 421da177e4SLinus Torvalds get_user(params.buffer_size, &src->buffer_size) || 431da177e4SLinus Torvalds get_user(params.avail_min, &src->avail_min) || 441da177e4SLinus Torvalds get_user(val, &src->no_active_sensing)) 451da177e4SLinus Torvalds return -EFAULT; 461da177e4SLinus Torvalds params.no_active_sensing = val; 471da177e4SLinus Torvalds switch (params.stream) { 481da177e4SLinus Torvalds case SNDRV_RAWMIDI_STREAM_OUTPUT: 491da177e4SLinus Torvalds return snd_rawmidi_output_params(rfile->output, ¶ms); 501da177e4SLinus Torvalds case SNDRV_RAWMIDI_STREAM_INPUT: 511da177e4SLinus Torvalds return snd_rawmidi_input_params(rfile->input, ¶ms); 521da177e4SLinus Torvalds } 531da177e4SLinus Torvalds return -EINVAL; 541da177e4SLinus Torvalds } 551da177e4SLinus Torvalds 561da177e4SLinus Torvalds struct sndrv_rawmidi_status32 { 571da177e4SLinus Torvalds s32 stream; 581da177e4SLinus Torvalds struct compat_timespec tstamp; 591da177e4SLinus Torvalds u32 avail; 601da177e4SLinus Torvalds u32 xruns; 611da177e4SLinus Torvalds unsigned char reserved[16]; 621da177e4SLinus Torvalds } __attribute__((packed)); 631da177e4SLinus Torvalds 641da177e4SLinus Torvalds static int snd_rawmidi_ioctl_status_compat(snd_rawmidi_file_t *rfile, 651da177e4SLinus Torvalds struct sndrv_rawmidi_status32 __user *src) 661da177e4SLinus Torvalds { 671da177e4SLinus Torvalds int err; 681da177e4SLinus Torvalds snd_rawmidi_status_t status; 691da177e4SLinus Torvalds 701da177e4SLinus Torvalds if (rfile->output == NULL) 711da177e4SLinus Torvalds return -EINVAL; 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: 771da177e4SLinus Torvalds err = snd_rawmidi_output_status(rfile->output, &status); 781da177e4SLinus Torvalds break; 791da177e4SLinus Torvalds case SNDRV_RAWMIDI_STREAM_INPUT: 801da177e4SLinus Torvalds err = snd_rawmidi_input_status(rfile->input, &status); 811da177e4SLinus Torvalds break; 821da177e4SLinus Torvalds default: 831da177e4SLinus Torvalds return -EINVAL; 841da177e4SLinus Torvalds } 851da177e4SLinus Torvalds if (err < 0) 861da177e4SLinus Torvalds return err; 871da177e4SLinus Torvalds 881da177e4SLinus Torvalds if (put_user(status.tstamp.tv_sec, &src->tstamp.tv_sec) || 891da177e4SLinus Torvalds put_user(status.tstamp.tv_nsec, &src->tstamp.tv_nsec) || 901da177e4SLinus Torvalds put_user(status.avail, &src->avail) || 911da177e4SLinus Torvalds put_user(status.xruns, &src->xruns)) 921da177e4SLinus Torvalds return -EFAULT; 931da177e4SLinus Torvalds 941da177e4SLinus Torvalds return 0; 951da177e4SLinus Torvalds } 961da177e4SLinus Torvalds 971da177e4SLinus Torvalds enum { 981da177e4SLinus Torvalds SNDRV_RAWMIDI_IOCTL_PARAMS32 = _IOWR('W', 0x10, struct sndrv_rawmidi_params32), 991da177e4SLinus Torvalds SNDRV_RAWMIDI_IOCTL_STATUS32 = _IOWR('W', 0x20, struct sndrv_rawmidi_status32), 1001da177e4SLinus Torvalds }; 1011da177e4SLinus Torvalds 1021da177e4SLinus Torvalds static long snd_rawmidi_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg) 1031da177e4SLinus Torvalds { 1041da177e4SLinus Torvalds snd_rawmidi_file_t *rfile; 1051da177e4SLinus Torvalds void __user *argp = compat_ptr(arg); 1061da177e4SLinus Torvalds 1071da177e4SLinus Torvalds rfile = file->private_data; 1081da177e4SLinus Torvalds switch (cmd) { 1091da177e4SLinus Torvalds case SNDRV_RAWMIDI_IOCTL_PVERSION: 1101da177e4SLinus Torvalds case SNDRV_RAWMIDI_IOCTL_INFO: 1111da177e4SLinus Torvalds case SNDRV_RAWMIDI_IOCTL_DROP: 1121da177e4SLinus Torvalds case SNDRV_RAWMIDI_IOCTL_DRAIN: 1131da177e4SLinus Torvalds return snd_rawmidi_ioctl(file, cmd, (unsigned long)argp); 1141da177e4SLinus Torvalds case SNDRV_RAWMIDI_IOCTL_PARAMS32: 1151da177e4SLinus Torvalds return snd_rawmidi_ioctl_params_compat(rfile, argp); 1161da177e4SLinus Torvalds case SNDRV_RAWMIDI_IOCTL_STATUS32: 1171da177e4SLinus Torvalds return snd_rawmidi_ioctl_status_compat(rfile, argp); 1181da177e4SLinus Torvalds } 1191da177e4SLinus Torvalds return -ENOIOCTLCMD; 1201da177e4SLinus Torvalds } 121