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/*
* 32bit -> 64bit ioctl wrapper for raw MIDI API
* Copyright (c) by Takashi Iwai <tiwai@suse.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
/* This file included from rawmidi.c */
#include <linux/compat.h>
struct snd_rawmidi_params32 {
s32 stream;
u32 buffer_size;
u32 avail_min;
unsigned int no_active_sensing; /* avoid bit-field */
unsigned char reserved[16];
} __attribute__((packed));
static int snd_rawmidi_ioctl_params_compat(struct snd_rawmidi_file *rfile,
struct snd_rawmidi_params32 __user *src)
{
struct snd_rawmidi_params params;
unsigned int val;
if (rfile->output == NULL)
return -EINVAL;
if (get_user(params.stream, &src->stream) ||
get_user(params.buffer_size, &src->buffer_size) ||
get_user(params.avail_min, &src->avail_min) ||
get_user(val, &src->no_active_sensing))
return -EFAULT;
params.no_active_sensing = val;
switch (params.stream) {
case SNDRV_RAWMIDI_STREAM_OUTPUT:
return snd_rawmidi_output_params(rfile->output, ¶ms);
case SNDRV_RAWMIDI_STREAM_INPUT:
return snd_rawmidi_input_params(rfile->input, ¶ms);
}
return -EINVAL;
}
struct snd_rawmidi_status32 {
s32 stream;
struct compat_timespec tstamp;
u32 avail;
u32 xruns;
unsigned char reserved[16];
} __attribute__((packed));
static int snd_rawmidi_ioctl_status_compat(struct snd_rawmidi_file *rfile,
struct snd_rawmidi_status32 __user *src)
{
int err;
struct snd_rawmidi_status status;
if (rfile->output == NULL)
return -EINVAL;
if (get_user(status.stream, &src->stream))
return -EFAULT;
switch (status.stream) {
case SNDRV_RAWMIDI_STREAM_OUTPUT:
err = snd_rawmidi_output_status(rfile->output, &status);
break;
case SNDRV_RAWMIDI_STREAM_INPUT:
err = snd_rawmidi_input_status(rfile->input, &status);
break;
default:
return -EINVAL;
}
if (err < 0)
return err;
if (put_user(status.tstamp.tv_sec, &src->tstamp.tv_sec) ||
put_user(status.tstamp.tv_nsec, &src->tstamp.tv_nsec) ||
put_user(status.avail, &src->avail) ||
put_user(status.xruns, &src->xruns))
return -EFAULT;
return 0;
}
enum {
SNDRV_RAWMIDI_IOCTL_PARAMS32 = _IOWR('W', 0x10, struct snd_rawmidi_params32),
SNDRV_RAWMIDI_IOCTL_STATUS32 = _IOWR('W', 0x20, struct snd_rawmidi_status32),
};
static long snd_rawmidi_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
{
struct snd_rawmidi_file *rfile;
void __user *argp = compat_ptr(arg);
rfile = file->private_data;
switch (cmd) {
case SNDRV_RAWMIDI_IOCTL_PVERSION:
case SNDRV_RAWMIDI_IOCTL_INFO:
case SNDRV_RAWMIDI_IOCTL_DROP:
case SNDRV_RAWMIDI_IOCTL_DRAIN:
return snd_rawmidi_ioctl(file, cmd, (unsigned long)argp);
case SNDRV_RAWMIDI_IOCTL_PARAMS32:
return snd_rawmidi_ioctl_params_compat(rfile, argp);
case SNDRV_RAWMIDI_IOCTL_STATUS32:
return snd_rawmidi_ioctl_status_compat(rfile, argp);
}
return -ENOIOCTLCMD;
}
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