/*
* 32bit -> 64bit ioctl wrapper for PCM 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
*
*/
#include <sound/driver.h>
#include <linux/time.h>
#include <linux/slab.h>
#include <linux/compat.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/minors.h>
#include "ioctl32.h"
/* wrapper for sndrv_pcm_[us]frames */
struct sndrv_pcm_sframes_str {
sndrv_pcm_sframes_t val;
};
struct sndrv_pcm_sframes_str32 {
s32 val;
};
struct sndrv_pcm_uframes_str {
sndrv_pcm_uframes_t val;
};
struct sndrv_pcm_uframes_str32 {
u32 val;
};
#define CVT_sndrv_pcm_sframes_str() { COPY_CVT(val); }
#define CVT_sndrv_pcm_uframes_str() { COPY_CVT(val); }
struct sndrv_pcm_hw_params32 {
u32 flags;
struct sndrv_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - SNDRV_PCM_HW_PARAM_FIRST_MASK + 1]; /* this must be identical */
struct sndrv_mask mres[5]; /* reserved masks */
struct sndrv_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
struct sndrv_interval ires[9]; /* reserved intervals */
u32 rmask;
u32 cmask;
u32 info;
u32 msbits;
u32 rate_num;
u32 rate_den;
u32 fifo_size;
unsigned char reserved[64];
} __attribute__((packed));
struct sndrv_pcm_sw_params32 {
s32 tstamp_mode;
u32 period_step;
u32 sleep_min;
u32 avail_min;
u32 xfer_align;
u32 start_threshold;
u32 stop_threshold;
u32 silence_threshold;
u32 silence_size;
u32 boundary;
unsigned char reserved[64];
} __attribute__((packed));
#define CVT_sndrv_pcm_sw_params()\
{\
COPY(tstamp_mode);\
COPY(period_step);\
COPY(sleep_min);\
COPY_CVT(avail_min);\
COPY_CVT(xfer_align);\
COPY_CVT(start_threshold);\
COPY_CVT(stop_threshold);\
COPY_CVT(silence_threshold);\
COPY_CVT(silence_size);\
COPY_CVT(boundary);\
}
struct sndrv_pcm_channel_info32 {
u32 channel;
u32 offset;
u32 first;
u32 step;
} __attribute__((packed));
#define CVT_sndrv_pcm_channel_info()\
{\
COPY(channel);\
COPY_CVT(offset);\
COPY(first);\
COPY(step);\
}
struct sndrv_pcm_status32 {
s32 state;
struct compat_timespec trigger_tstamp;
struct compat_timespec tstamp;
u32 appl_ptr;
u32 hw_ptr;
s32 delay;
u32 avail;
u32 avail_max;
u32 overrange;
s32 suspended_state;
unsigned char reserved[60];
} __attribute__((packed));
#define CVT_sndrv_pcm_status()\
{\
COPY(state);\
COPY_CVT(trigger_tstamp.tv_sec);\
COPY_CVT(trigger_tstamp.tv_nsec);\
COPY_CVT(tstamp.tv_sec);\
COPY_CVT(tstamp.tv_nsec);\
COPY_CVT(appl_ptr);\
COPY_CVT(hw_ptr);\
COPY_CVT(delay);\
COPY_CVT(avail);\
COPY_CVT(avail_max);\
COPY_CVT(overrange);\
COPY(suspended_state);\
}
DEFINE_ALSA_IOCTL(pcm_uframes_str);
DEFINE_ALSA_IOCTL(pcm_sframes_str);
DEFINE_ALSA_IOCTL(pcm_sw_params);
DEFINE_ALSA_IOCTL(pcm_channel_info);
DEFINE_ALSA_IOCTL(pcm_status);
/* sanity device check */
extern int snd_major;
static int sanity_check_pcm(struct file *file)
{
unsigned short minor;
if (imajor(file->f_dentry->d_inode) != snd_major)
return -ENOTTY;
minor = iminor(file->f_dentry->d_inode);
if (minor >= 256 ||
minor % SNDRV_MINOR_DEVICES < SNDRV_MINOR_PCM_PLAYBACK)
return -ENOTTY;
return 0;
}
/* recalcuate the boundary within 32bit */
static void recalculate_boundary(snd_pcm_runtime_t *runtime)
{
if (! runtime->buffer_size)
return;
runtime->boundary = runtime->buffer_size;
while (runtime->boundary * 2 <= 0x7fffffffUL - runtime->buffer_size)
runtime->boundary *= 2;
}
/* both for HW_PARAMS and HW_REFINE */
static int _snd_ioctl32_pcm_hw_params(unsigned int fd, unsigned int cmd, unsigned long arg, struct file *file, unsigned int native_ctl)
{
struct sndrv_pcm_hw_params32 __user *data32;
struct sndrv_pcm_hw_params *data;
snd_pcm_file_t *pcm_file;
snd_pcm_substream_t *substream;
snd_pcm_runtime_t *runtime;
int err;
if (sanity_check_pcm(file))
return -ENOTTY;
if (! (pcm_file = file->private_data))
return -ENOTTY;
if (! (substream = pcm_file->substream))
return -ENOTTY;
if (! (runtime = substream->runtime))
return -ENOTTY;
data32 = compat_ptr(arg);
data = kmalloc(sizeof(*data), GFP_KERNEL);
if (data == NULL)
return -ENOMEM;
if (copy_from_user(data, data32, sizeof(*data32))) {
err = -EFAULT;
goto error;
}
if (native_ctl == SNDRV_PCM_IOCTL_HW_REFINE)
err = snd_pcm_hw_refine(substream, data);
else
err = snd_pcm_hw_params(substream, data);
if (err < 0)
goto error;
if (copy_to_user(data32, data, sizeof(*data32)) ||
__put_user((u32)data->fifo_size, &data32->fifo_size)) {
err = -EFAULT;
goto error;
}
if (native_ctl == SNDRV_PCM_IOCTL_HW_PARAMS)
recalculate_boundary(runtime);
error:
kfree(data);
return err;
}
/*
*/
struct sndrv_xferi32 {
s32 result;
u32 buf;
u32 frames;
} __attribute__((packed));
static int _snd_ioctl32_xferi(unsigned int fd, unsigned int cmd, unsigned long arg, struct file *file, unsigned int native_ctl)
{
struct sndrv_xferi32 data32;
struct sndrv_xferi __user *data;
snd_pcm_sframes_t result;
int err;
if (copy_from_user(&data32, (void __user *)arg, sizeof(data32)))
return -EFAULT;
data = compat_alloc_user_space(sizeof(*data));
if (put_user((snd_pcm_sframes_t)data32.result, &data->result) ||
__put_user(compat_ptr(data32.buf), &data->buf) ||
__put_user((snd_pcm_uframes_t)data32.frames, &data->frames))
return -EFAULT;
err = file->f_op->ioctl(file->f_dentry->d_inode, file, native_ctl, (unsigned long)data);
if (err < 0)
return err;
/* copy the result */
if (__get_user(result, &data->result))
return -EFAULT;
data32.result = result;
if (copy_to_user((void __user *)arg, &data32, sizeof(data32)))
return -EFAULT;
return 0;
}
/* snd_xfern needs remapping of bufs */
struct sndrv_xfern32 {
s32 result;
u32 bufs; /* this is void **; */
u32 frames;
} __attribute__((packed));
/*
* xfern ioctl nees to copy (up to) 128 pointers on stack.
* although we may pass the copied pointers through f_op->ioctl, but the ioctl
* handler there expands again the same 128 pointers on stack, so it is better
* to handle the function (calling pcm_readv/writev) directly in this handler.
*/
static int _snd_ioctl32_xfern(unsigned int fd, unsigned int cmd, unsigned long arg, struct file *file, unsigned int native_ctl)
{
snd_pcm_file_t *pcm_file;
snd_pcm_substream_t *substream;
struct sndrv_xfern32 __user *srcptr = compat_ptr(arg);
struct sndrv_xfern32 data32;
void __user **bufs;
int err = 0, ch, i;
u32 __user *bufptr;
if (sanity_check_pcm(file))
return -ENOTTY;
if (! (pcm_file = file->private_data))
return -ENOTTY;
if (! (substream = pcm_file->substream))
return -ENOTTY;
if (! substream->runtime)
return -ENOTTY;
/* check validty of the command */
switch (native_ctl) {
case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
return -EINVAL;
if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN)
return -EBADFD;
break;
case SNDRV_PCM_IOCTL_READN_FRAMES:
if (substream->stream != SNDRV_PCM_STREAM_CAPTURE)
return -EINVAL;
break;
}
if ((ch = substream->runtime->channels) > 128)
return -EINVAL;
if (copy_from_user(&data32, (void __user *)arg, sizeof(data32)))
return -EFAULT;
bufptr = compat_ptr(data32.bufs);
bufs = kmalloc(sizeof(void __user *) * ch, GFP_KERNEL);
if (bufs == NULL)
return -ENOMEM;
for (i = 0; i < ch; i++) {
u32 ptr;
if (get_user(ptr, bufptr)) {
kfree(bufs);
return -EFAULT;
}
bufs[ch] = compat_ptr(ptr);
bufptr++;
}
switch (native_ctl) {
case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
err = snd_pcm_lib_writev(substream, bufs, data32.frames);
break;
case SNDRV_PCM_IOCTL_READN_FRAMES:
err = snd_pcm_lib_readv(substream, bufs, data32.frames);
break;
}
if (err >= 0) {
if (put_user(err, &srcptr->result))
err = -EFAULT;
}
kfree(bufs);
return err;
}
struct sndrv_pcm_mmap_status32 {
s32 state;
s32 pad1;
u32 hw_ptr;
struct compat_timespec tstamp;
s32 suspended_state;
} __attribute__((packed));
struct sndrv_pcm_mmap_control32 {
u32 appl_ptr;
u32 avail_min;
} __attribute__((packed));
struct sndrv_pcm_sync_ptr32 {
u32 flags;
union {
struct sndrv_pcm_mmap_status32 status;
unsigned char reserved[64];
} s;
union {
struct sndrv_pcm_mmap_control32 control;
unsigned char reserved[64];
} c;
} __attribute__((packed));
#define CVT_sndrv_pcm_sync_ptr()\
{\
COPY(flags);\
COPY(s.status.state);\
COPY(s.status.pad1);\
COPY_CVT(s.status.hw_ptr);\
COPY_CVT(s.status.tstamp.tv_sec);\
COPY_CVT(s.status.tstamp.tv_nsec);\
COPY(s.status.suspended_state);\
COPY_CVT(c.control.appl_ptr);\
COPY_CVT(c.control.avail_min);\
}
DEFINE_ALSA_IOCTL(pcm_sync_ptr);
/*
*/
DEFINE_ALSA_IOCTL_ENTRY(pcm_hw_refine, pcm_hw_params, SNDRV_PCM_IOCTL_HW_REFINE);
DEFINE_ALSA_IOCTL_ENTRY(pcm_hw_params, pcm_hw_params, SNDRV_PCM_IOCTL_HW_PARAMS);
DEFINE_ALSA_IOCTL_ENTRY(pcm_sw_params, pcm_sw_params, SNDRV_PCM_IOCTL_SW_PARAMS);
DEFINE_ALSA_IOCTL_ENTRY(pcm_status, pcm_status, SNDRV_PCM_IOCTL_STATUS);
DEFINE_ALSA_IOCTL_ENTRY(pcm_delay, pcm_sframes_str, SNDRV_PCM_IOCTL_DELAY);
DEFINE_ALSA_IOCTL_ENTRY(pcm_channel_info, pcm_channel_info, SNDRV_PCM_IOCTL_CHANNEL_INFO);
DEFINE_ALSA_IOCTL_ENTRY(pcm_rewind, pcm_uframes_str, SNDRV_PCM_IOCTL_REWIND);
DEFINE_ALSA_IOCTL_ENTRY(pcm_forward, pcm_uframes_str, SNDRV_PCM_IOCTL_FORWARD);
DEFINE_ALSA_IOCTL_ENTRY(pcm_readi, xferi, SNDRV_PCM_IOCTL_READI_FRAMES);
DEFINE_ALSA_IOCTL_ENTRY(pcm_writei, xferi, SNDRV_PCM_IOCTL_WRITEI_FRAMES);
DEFINE_ALSA_IOCTL_ENTRY(pcm_readn, xfern, SNDRV_PCM_IOCTL_READN_FRAMES);
DEFINE_ALSA_IOCTL_ENTRY(pcm_writen, xfern, SNDRV_PCM_IOCTL_WRITEN_FRAMES);
DEFINE_ALSA_IOCTL_ENTRY(pcm_sync_ptr, pcm_sync_ptr, SNDRV_PCM_IOCTL_SYNC_PTR);
/*
* When PCM is used on 32bit mode, we need to disable
* mmap of PCM status/control records because of the size
* incompatibility.
*
* Since INFO ioctl is always called at first, we mark the
* mmap-disabling in this ioctl wrapper.
*/
static int snd_pcm_info_ioctl32(unsigned int fd, unsigned int cmd, unsigned long arg, struct file *filp)
{
snd_pcm_file_t *pcm_file;
snd_pcm_substream_t *substream;
if (! filp->f_op || ! filp->f_op->ioctl)
return -ENOTTY;
pcm_file = filp->private_data;
if (! pcm_file)
return -ENOTTY;
substream = pcm_file->substream;
if (! substream)
return -ENOTTY;
substream->no_mmap_ctrl = 1;
return filp->f_op->ioctl(filp->f_dentry->d_inode, filp, cmd, arg);
}
/*
*/
#define AP(x) snd_ioctl32_##x
enum {
SNDRV_PCM_IOCTL_HW_REFINE32 = _IOWR('A', 0x10, struct sndrv_pcm_hw_params32),
SNDRV_PCM_IOCTL_HW_PARAMS32 = _IOWR('A', 0x11, struct sndrv_pcm_hw_params32),
SNDRV_PCM_IOCTL_SW_PARAMS32 = _IOWR('A', 0x13, struct sndrv_pcm_sw_params32),
SNDRV_PCM_IOCTL_STATUS32 = _IOR('A', 0x20, struct sndrv_pcm_status32),
SNDRV_PCM_IOCTL_DELAY32 = _IOR('A', 0x21, s32),
SNDRV_PCM_IOCTL_CHANNEL_INFO32 = _IOR('A', 0x32, struct sndrv_pcm_channel_info32),
SNDRV_PCM_IOCTL_REWIND32 = _IOW('A', 0x46, u32),
SNDRV_PCM_IOCTL_FORWARD32 = _IOW('A', 0x49, u32),
SNDRV_PCM_IOCTL_WRITEI_FRAMES32 = _IOW('A', 0x50, struct sndrv_xferi32),
SNDRV_PCM_IOCTL_READI_FRAMES32 = _IOR('A', 0x51, struct sndrv_xferi32),
SNDRV_PCM_IOCTL_WRITEN_FRAMES32 = _IOW('A', 0x52, struct sndrv_xfern32),
SNDRV_PCM_IOCTL_READN_FRAMES32 = _IOR('A', 0x53, struct sndrv_xfern32),
SNDRV_PCM_IOCTL_SYNC_PTR32 = _IOWR('A', 0x23, struct sndrv_pcm_sync_ptr32),
};
struct ioctl32_mapper pcm_mappers[] = {
MAP_COMPAT(SNDRV_PCM_IOCTL_PVERSION),
/* MAP_COMPAT(SNDRV_PCM_IOCTL_INFO), */
{ SNDRV_PCM_IOCTL_INFO, snd_pcm_info_ioctl32 },
MAP_COMPAT(SNDRV_PCM_IOCTL_TSTAMP),
{ SNDRV_PCM_IOCTL_HW_REFINE32, AP(pcm_hw_refine) },
{ SNDRV_PCM_IOCTL_HW_PARAMS32, AP(pcm_hw_params) },
MAP_COMPAT(SNDRV_PCM_IOCTL_HW_FREE),
{ SNDRV_PCM_IOCTL_SW_PARAMS32, AP(pcm_sw_params) },
{ SNDRV_PCM_IOCTL_STATUS32, AP(pcm_status) },
{ SNDRV_PCM_IOCTL_DELAY32, AP(pcm_delay) },
MAP_COMPAT(SNDRV_PCM_IOCTL_HWSYNC),
{ SNDRV_PCM_IOCTL_SYNC_PTR32, AP(pcm_sync_ptr) },
{ SNDRV_PCM_IOCTL_CHANNEL_INFO32, AP(pcm_channel_info) },
MAP_COMPAT(SNDRV_PCM_IOCTL_PREPARE),
MAP_COMPAT(SNDRV_PCM_IOCTL_RESET),
MAP_COMPAT(SNDRV_PCM_IOCTL_START),
MAP_COMPAT(SNDRV_PCM_IOCTL_DROP),
MAP_COMPAT(SNDRV_PCM_IOCTL_DRAIN),
MAP_COMPAT(SNDRV_PCM_IOCTL_PAUSE),
{ SNDRV_PCM_IOCTL_REWIND32, AP(pcm_rewind) },
MAP_COMPAT(SNDRV_PCM_IOCTL_RESUME),
MAP_COMPAT(SNDRV_PCM_IOCTL_XRUN),
{ SNDRV_PCM_IOCTL_FORWARD32, AP(pcm_forward) },
{ SNDRV_PCM_IOCTL_WRITEI_FRAMES32, AP(pcm_writei) },
{ SNDRV_PCM_IOCTL_READI_FRAMES32, AP(pcm_readi) },
{ SNDRV_PCM_IOCTL_WRITEN_FRAMES32, AP(pcm_writen) },
{ SNDRV_PCM_IOCTL_READN_FRAMES32, AP(pcm_readn) },
MAP_COMPAT(SNDRV_PCM_IOCTL_LINK),
MAP_COMPAT(SNDRV_PCM_IOCTL_UNLINK),
{ 0 },
};
![[BACK]](/icons/back.gif){kind=icon}
Return to pcm32.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [Development] / linux-2.6-xfs / sound / core / ioctl32