11a59d1b8SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-or-later 21da177e4SLinus Torvalds /* 31da177e4SLinus Torvalds * 32bit -> 64bit ioctl wrapper for raw MIDI API 41da177e4SLinus Torvalds * Copyright (c) by Takashi Iwai <tiwai@suse.de> 51da177e4SLinus Torvalds */ 61da177e4SLinus Torvalds 71da177e4SLinus Torvalds /* This file included from rawmidi.c */ 81da177e4SLinus Torvalds 91da177e4SLinus Torvalds #include <linux/compat.h> 101da177e4SLinus Torvalds 1148c9d417STakashi Iwai struct snd_rawmidi_params32 { 121da177e4SLinus Torvalds s32 stream; 131da177e4SLinus Torvalds u32 buffer_size; 141da177e4SLinus Torvalds u32 avail_min; 151da177e4SLinus Torvalds unsigned int no_active_sensing; /* avoid bit-field */ 16*08fdced6SDavid Henningsson unsigned int mode; 17*08fdced6SDavid Henningsson unsigned char reserved[12]; 181da177e4SLinus Torvalds } __attribute__((packed)); 191da177e4SLinus Torvalds 2048c9d417STakashi Iwai static int snd_rawmidi_ioctl_params_compat(struct snd_rawmidi_file *rfile, 2148c9d417STakashi Iwai struct snd_rawmidi_params32 __user *src) 221da177e4SLinus Torvalds { 2348c9d417STakashi Iwai struct snd_rawmidi_params params; 241da177e4SLinus Torvalds unsigned int val; 251da177e4SLinus Torvalds 261da177e4SLinus Torvalds if (get_user(params.stream, &src->stream) || 271da177e4SLinus Torvalds get_user(params.buffer_size, &src->buffer_size) || 281da177e4SLinus Torvalds get_user(params.avail_min, &src->avail_min) || 29*08fdced6SDavid Henningsson get_user(params.mode, &src->mode) || 301da177e4SLinus Torvalds get_user(val, &src->no_active_sensing)) 311da177e4SLinus Torvalds return -EFAULT; 321da177e4SLinus Torvalds params.no_active_sensing = val; 331da177e4SLinus Torvalds switch (params.stream) { 341da177e4SLinus Torvalds case SNDRV_RAWMIDI_STREAM_OUTPUT: 358a56ef4fSTakashi Iwai if (!rfile->output) 368a56ef4fSTakashi Iwai return -EINVAL; 371da177e4SLinus Torvalds return snd_rawmidi_output_params(rfile->output, ¶ms); 381da177e4SLinus Torvalds case SNDRV_RAWMIDI_STREAM_INPUT: 398a56ef4fSTakashi Iwai if (!rfile->input) 408a56ef4fSTakashi Iwai return -EINVAL; 411da177e4SLinus Torvalds return snd_rawmidi_input_params(rfile->input, ¶ms); 421da177e4SLinus Torvalds } 431da177e4SLinus Torvalds return -EINVAL; 441da177e4SLinus Torvalds } 451da177e4SLinus Torvalds 46d9e5582cSBaolin Wang struct compat_snd_rawmidi_status64 { 471da177e4SLinus Torvalds s32 stream; 48d9e5582cSBaolin Wang u8 rsvd[4]; /* alignment */ 49d9e5582cSBaolin Wang s64 tstamp_sec; 50d9e5582cSBaolin Wang s64 tstamp_nsec; 511da177e4SLinus Torvalds u32 avail; 521da177e4SLinus Torvalds u32 xruns; 531da177e4SLinus Torvalds unsigned char reserved[16]; 541da177e4SLinus Torvalds } __attribute__((packed)); 551da177e4SLinus Torvalds 56d9e5582cSBaolin Wang static int snd_rawmidi_ioctl_status_compat64(struct snd_rawmidi_file *rfile, 57d9e5582cSBaolin Wang struct compat_snd_rawmidi_status64 __user *src) 581da177e4SLinus Torvalds { 591da177e4SLinus Torvalds int err; 60d9e5582cSBaolin Wang struct snd_rawmidi_status64 status; 61d9e5582cSBaolin Wang struct compat_snd_rawmidi_status64 compat_status; 621da177e4SLinus Torvalds 631da177e4SLinus Torvalds if (get_user(status.stream, &src->stream)) 641da177e4SLinus Torvalds return -EFAULT; 651da177e4SLinus Torvalds 661da177e4SLinus Torvalds switch (status.stream) { 671da177e4SLinus Torvalds case SNDRV_RAWMIDI_STREAM_OUTPUT: 688a56ef4fSTakashi Iwai if (!rfile->output) 698a56ef4fSTakashi Iwai return -EINVAL; 701da177e4SLinus Torvalds err = snd_rawmidi_output_status(rfile->output, &status); 711da177e4SLinus Torvalds break; 721da177e4SLinus Torvalds case SNDRV_RAWMIDI_STREAM_INPUT: 738a56ef4fSTakashi Iwai if (!rfile->input) 748a56ef4fSTakashi Iwai return -EINVAL; 751da177e4SLinus Torvalds err = snd_rawmidi_input_status(rfile->input, &status); 761da177e4SLinus Torvalds break; 771da177e4SLinus Torvalds default: 781da177e4SLinus Torvalds return -EINVAL; 791da177e4SLinus Torvalds } 801da177e4SLinus Torvalds if (err < 0) 811da177e4SLinus Torvalds return err; 821da177e4SLinus Torvalds 83d9e5582cSBaolin Wang compat_status = (struct compat_snd_rawmidi_status64) { 84d9e5582cSBaolin Wang .stream = status.stream, 85d9e5582cSBaolin Wang .tstamp_sec = status.tstamp_sec, 86d9e5582cSBaolin Wang .tstamp_nsec = status.tstamp_nsec, 87d9e5582cSBaolin Wang .avail = status.avail, 88d9e5582cSBaolin Wang .xruns = status.xruns, 89d9e5582cSBaolin Wang }; 90d9e5582cSBaolin Wang 91d9e5582cSBaolin Wang if (copy_to_user(src, &compat_status, sizeof(*src))) 921da177e4SLinus Torvalds return -EFAULT; 931da177e4SLinus Torvalds 941da177e4SLinus Torvalds return 0; 951da177e4SLinus Torvalds } 961da177e4SLinus Torvalds 971da177e4SLinus Torvalds enum { 9848c9d417STakashi Iwai SNDRV_RAWMIDI_IOCTL_PARAMS32 = _IOWR('W', 0x10, struct snd_rawmidi_params32), 99d9e5582cSBaolin Wang SNDRV_RAWMIDI_IOCTL_STATUS_COMPAT32 = _IOWR('W', 0x20, struct snd_rawmidi_status32), 100d9e5582cSBaolin Wang SNDRV_RAWMIDI_IOCTL_STATUS_COMPAT64 = _IOWR('W', 0x20, struct compat_snd_rawmidi_status64), 1011da177e4SLinus Torvalds }; 1021da177e4SLinus Torvalds 1031da177e4SLinus Torvalds static long snd_rawmidi_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg) 1041da177e4SLinus Torvalds { 10548c9d417STakashi Iwai struct snd_rawmidi_file *rfile; 1061da177e4SLinus Torvalds void __user *argp = compat_ptr(arg); 1071da177e4SLinus Torvalds 1081da177e4SLinus Torvalds rfile = file->private_data; 1091da177e4SLinus Torvalds switch (cmd) { 1101da177e4SLinus Torvalds case SNDRV_RAWMIDI_IOCTL_PVERSION: 1111da177e4SLinus Torvalds case SNDRV_RAWMIDI_IOCTL_INFO: 1121da177e4SLinus Torvalds case SNDRV_RAWMIDI_IOCTL_DROP: 1131da177e4SLinus Torvalds case SNDRV_RAWMIDI_IOCTL_DRAIN: 1141da177e4SLinus Torvalds return snd_rawmidi_ioctl(file, cmd, (unsigned long)argp); 1151da177e4SLinus Torvalds case SNDRV_RAWMIDI_IOCTL_PARAMS32: 1161da177e4SLinus Torvalds return snd_rawmidi_ioctl_params_compat(rfile, argp); 117d9e5582cSBaolin Wang case SNDRV_RAWMIDI_IOCTL_STATUS_COMPAT32: 118d9e5582cSBaolin Wang return snd_rawmidi_ioctl_status32(rfile, argp); 119d9e5582cSBaolin Wang case SNDRV_RAWMIDI_IOCTL_STATUS_COMPAT64: 120d9e5582cSBaolin Wang return snd_rawmidi_ioctl_status_compat64(rfile, argp); 1211da177e4SLinus Torvalds } 1221da177e4SLinus Torvalds return -ENOIOCTLCMD; 1231da177e4SLinus Torvalds } 124