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121 lines
3.5 KiB
121 lines
3.5 KiB
20 years ago
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/*
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* 32bit -> 64bit ioctl wrapper for raw MIDI API
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* Copyright (c) by Takashi Iwai <tiwai@suse.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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/* This file included from rawmidi.c */
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#include <linux/compat.h>
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struct sndrv_rawmidi_params32 {
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s32 stream;
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u32 buffer_size;
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u32 avail_min;
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unsigned int no_active_sensing; /* avoid bit-field */
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unsigned char reserved[16];
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} __attribute__((packed));
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static int snd_rawmidi_ioctl_params_compat(snd_rawmidi_file_t *rfile,
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struct sndrv_rawmidi_params32 __user *src)
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{
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snd_rawmidi_params_t params;
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unsigned int val;
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if (rfile->output == NULL)
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return -EINVAL;
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if (get_user(params.stream, &src->stream) ||
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get_user(params.buffer_size, &src->buffer_size) ||
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get_user(params.avail_min, &src->avail_min) ||
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get_user(val, &src->no_active_sensing))
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return -EFAULT;
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params.no_active_sensing = val;
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switch (params.stream) {
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case SNDRV_RAWMIDI_STREAM_OUTPUT:
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return snd_rawmidi_output_params(rfile->output, ¶ms);
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case SNDRV_RAWMIDI_STREAM_INPUT:
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return snd_rawmidi_input_params(rfile->input, ¶ms);
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}
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return -EINVAL;
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}
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struct sndrv_rawmidi_status32 {
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s32 stream;
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struct compat_timespec tstamp;
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u32 avail;
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u32 xruns;
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unsigned char reserved[16];
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} __attribute__((packed));
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static int snd_rawmidi_ioctl_status_compat(snd_rawmidi_file_t *rfile,
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struct sndrv_rawmidi_status32 __user *src)
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{
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int err;
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snd_rawmidi_status_t status;
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if (rfile->output == NULL)
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return -EINVAL;
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if (get_user(status.stream, &src->stream))
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return -EFAULT;
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switch (status.stream) {
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case SNDRV_RAWMIDI_STREAM_OUTPUT:
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err = snd_rawmidi_output_status(rfile->output, &status);
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break;
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case SNDRV_RAWMIDI_STREAM_INPUT:
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err = snd_rawmidi_input_status(rfile->input, &status);
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break;
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default:
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return -EINVAL;
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}
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if (err < 0)
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return err;
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if (put_user(status.tstamp.tv_sec, &src->tstamp.tv_sec) ||
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put_user(status.tstamp.tv_nsec, &src->tstamp.tv_nsec) ||
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put_user(status.avail, &src->avail) ||
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put_user(status.xruns, &src->xruns))
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return -EFAULT;
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return 0;
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}
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enum {
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SNDRV_RAWMIDI_IOCTL_PARAMS32 = _IOWR('W', 0x10, struct sndrv_rawmidi_params32),
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SNDRV_RAWMIDI_IOCTL_STATUS32 = _IOWR('W', 0x20, struct sndrv_rawmidi_status32),
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};
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static long snd_rawmidi_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
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{
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snd_rawmidi_file_t *rfile;
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void __user *argp = compat_ptr(arg);
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rfile = file->private_data;
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switch (cmd) {
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case SNDRV_RAWMIDI_IOCTL_PVERSION:
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case SNDRV_RAWMIDI_IOCTL_INFO:
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case SNDRV_RAWMIDI_IOCTL_DROP:
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case SNDRV_RAWMIDI_IOCTL_DRAIN:
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return snd_rawmidi_ioctl(file, cmd, (unsigned long)argp);
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case SNDRV_RAWMIDI_IOCTL_PARAMS32:
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return snd_rawmidi_ioctl_params_compat(rfile, argp);
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case SNDRV_RAWMIDI_IOCTL_STATUS32:
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return snd_rawmidi_ioctl_status_compat(rfile, argp);
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}
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return -ENOIOCTLCMD;
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}
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