543 lines
15 KiB
C
543 lines
15 KiB
C
/*
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* 32bit -> 64bit ioctl wrapper for PCM 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 pcm_native.c */
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#include <linux/compat.h>
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#include <linux/slab.h>
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static int snd_pcm_ioctl_delay_compat(struct snd_pcm_substream *substream,
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s32 __user *src)
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{
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snd_pcm_sframes_t delay;
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mm_segment_t fs;
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int err;
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fs = snd_enter_user();
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err = snd_pcm_delay(substream, &delay);
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snd_leave_user(fs);
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if (err < 0)
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return err;
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if (put_user(delay, src))
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return -EFAULT;
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return err;
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}
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static int snd_pcm_ioctl_rewind_compat(struct snd_pcm_substream *substream,
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u32 __user *src)
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{
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snd_pcm_uframes_t frames;
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int err;
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if (get_user(frames, src))
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return -EFAULT;
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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err = snd_pcm_playback_rewind(substream, frames);
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else
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err = snd_pcm_capture_rewind(substream, frames);
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if (put_user(err, src))
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return -EFAULT;
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return err < 0 ? err : 0;
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}
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static int snd_pcm_ioctl_forward_compat(struct snd_pcm_substream *substream,
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u32 __user *src)
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{
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snd_pcm_uframes_t frames;
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int err;
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if (get_user(frames, src))
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return -EFAULT;
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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err = snd_pcm_playback_forward(substream, frames);
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else
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err = snd_pcm_capture_forward(substream, frames);
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if (put_user(err, src))
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return -EFAULT;
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return err < 0 ? err : 0;
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}
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struct snd_pcm_hw_params32 {
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u32 flags;
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struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - SNDRV_PCM_HW_PARAM_FIRST_MASK + 1]; /* this must be identical */
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struct snd_mask mres[5]; /* reserved masks */
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struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
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struct snd_interval ires[9]; /* reserved intervals */
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u32 rmask;
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u32 cmask;
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u32 info;
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u32 msbits;
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u32 rate_num;
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u32 rate_den;
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u32 fifo_size;
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unsigned char reserved[64];
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};
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struct snd_pcm_sw_params32 {
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s32 tstamp_mode;
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u32 period_step;
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u32 sleep_min;
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u32 avail_min;
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u32 xfer_align;
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u32 start_threshold;
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u32 stop_threshold;
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u32 silence_threshold;
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u32 silence_size;
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u32 boundary;
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u32 proto;
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u32 tstamp_type;
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unsigned char reserved[56];
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};
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/* recalcuate the boundary within 32bit */
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static snd_pcm_uframes_t recalculate_boundary(struct snd_pcm_runtime *runtime)
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{
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snd_pcm_uframes_t boundary;
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if (! runtime->buffer_size)
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return 0;
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boundary = runtime->buffer_size;
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while (boundary * 2 <= 0x7fffffffUL - runtime->buffer_size)
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boundary *= 2;
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return boundary;
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}
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static int snd_pcm_ioctl_sw_params_compat(struct snd_pcm_substream *substream,
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struct snd_pcm_sw_params32 __user *src)
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{
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struct snd_pcm_sw_params params;
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snd_pcm_uframes_t boundary;
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int err;
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memset(¶ms, 0, sizeof(params));
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if (get_user(params.tstamp_mode, &src->tstamp_mode) ||
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get_user(params.period_step, &src->period_step) ||
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get_user(params.sleep_min, &src->sleep_min) ||
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get_user(params.avail_min, &src->avail_min) ||
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get_user(params.xfer_align, &src->xfer_align) ||
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get_user(params.start_threshold, &src->start_threshold) ||
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get_user(params.stop_threshold, &src->stop_threshold) ||
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get_user(params.silence_threshold, &src->silence_threshold) ||
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get_user(params.silence_size, &src->silence_size) ||
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get_user(params.tstamp_type, &src->tstamp_type) ||
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get_user(params.proto, &src->proto))
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return -EFAULT;
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/*
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* Check silent_size parameter. Since we have 64bit boundary,
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* silence_size must be compared with the 32bit boundary.
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*/
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boundary = recalculate_boundary(substream->runtime);
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if (boundary && params.silence_size >= boundary)
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params.silence_size = substream->runtime->boundary;
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err = snd_pcm_sw_params(substream, ¶ms);
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if (err < 0)
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return err;
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if (boundary && put_user(boundary, &src->boundary))
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return -EFAULT;
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return err;
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}
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struct snd_pcm_channel_info32 {
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u32 channel;
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u32 offset;
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u32 first;
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u32 step;
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};
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static int snd_pcm_ioctl_channel_info_compat(struct snd_pcm_substream *substream,
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struct snd_pcm_channel_info32 __user *src)
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{
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struct snd_pcm_channel_info info;
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int err;
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if (get_user(info.channel, &src->channel) ||
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get_user(info.offset, &src->offset) ||
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get_user(info.first, &src->first) ||
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get_user(info.step, &src->step))
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return -EFAULT;
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err = snd_pcm_channel_info(substream, &info);
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if (err < 0)
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return err;
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if (put_user(info.channel, &src->channel) ||
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put_user(info.offset, &src->offset) ||
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put_user(info.first, &src->first) ||
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put_user(info.step, &src->step))
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return -EFAULT;
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return err;
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}
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struct snd_pcm_status32 {
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s32 state;
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struct compat_timespec trigger_tstamp;
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struct compat_timespec tstamp;
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u32 appl_ptr;
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u32 hw_ptr;
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s32 delay;
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u32 avail;
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u32 avail_max;
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u32 overrange;
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s32 suspended_state;
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u32 reserved_alignment;
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struct compat_timespec audio_tstamp;
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unsigned char reserved[56-sizeof(struct compat_timespec)];
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} __attribute__((packed));
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static int snd_pcm_status_user_compat(struct snd_pcm_substream *substream,
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struct snd_pcm_status32 __user *src)
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{
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struct snd_pcm_status status;
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int err;
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err = snd_pcm_status(substream, &status);
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if (err < 0)
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return err;
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if (clear_user(src, sizeof(*src)))
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return -EFAULT;
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if (put_user(status.state, &src->state) ||
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compat_put_timespec(&status.trigger_tstamp, &src->trigger_tstamp) ||
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compat_put_timespec(&status.tstamp, &src->tstamp) ||
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put_user(status.appl_ptr, &src->appl_ptr) ||
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put_user(status.hw_ptr, &src->hw_ptr) ||
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put_user(status.delay, &src->delay) ||
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put_user(status.avail, &src->avail) ||
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put_user(status.avail_max, &src->avail_max) ||
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put_user(status.overrange, &src->overrange) ||
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put_user(status.suspended_state, &src->suspended_state) ||
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compat_put_timespec(&status.audio_tstamp, &src->audio_tstamp))
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return -EFAULT;
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return err;
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}
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/* both for HW_PARAMS and HW_REFINE */
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static int snd_pcm_ioctl_hw_params_compat(struct snd_pcm_substream *substream,
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int refine,
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struct snd_pcm_hw_params32 __user *data32)
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{
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struct snd_pcm_hw_params *data;
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struct snd_pcm_runtime *runtime;
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int err;
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if (! (runtime = substream->runtime))
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return -ENOTTY;
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/* only fifo_size is different, so just copy all */
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data = memdup_user(data32, sizeof(*data32));
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if (IS_ERR(data))
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return PTR_ERR(data);
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if (refine)
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err = snd_pcm_hw_refine(substream, data);
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else
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err = snd_pcm_hw_params(substream, data);
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if (err < 0)
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goto error;
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if (copy_to_user(data32, data, sizeof(*data32)) ||
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put_user(data->fifo_size, &data32->fifo_size)) {
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err = -EFAULT;
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goto error;
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}
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if (! refine) {
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unsigned int new_boundary = recalculate_boundary(runtime);
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if (new_boundary)
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runtime->boundary = new_boundary;
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}
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error:
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kfree(data);
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return err;
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}
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/*
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*/
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struct snd_xferi32 {
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s32 result;
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u32 buf;
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u32 frames;
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};
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static int snd_pcm_ioctl_xferi_compat(struct snd_pcm_substream *substream,
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int dir, struct snd_xferi32 __user *data32)
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{
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compat_caddr_t buf;
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u32 frames;
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int err;
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if (! substream->runtime)
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return -ENOTTY;
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if (substream->stream != dir)
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return -EINVAL;
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if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN)
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return -EBADFD;
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if (get_user(buf, &data32->buf) ||
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get_user(frames, &data32->frames))
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return -EFAULT;
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if (dir == SNDRV_PCM_STREAM_PLAYBACK)
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err = snd_pcm_lib_write(substream, compat_ptr(buf), frames);
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else
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err = snd_pcm_lib_read(substream, compat_ptr(buf), frames);
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if (err < 0)
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return err;
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/* copy the result */
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if (put_user(err, &data32->result))
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return -EFAULT;
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return 0;
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}
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/* snd_xfern needs remapping of bufs */
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struct snd_xfern32 {
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s32 result;
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u32 bufs; /* this is void **; */
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u32 frames;
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};
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/*
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* xfern ioctl nees to copy (up to) 128 pointers on stack.
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* although we may pass the copied pointers through f_op->ioctl, but the ioctl
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* handler there expands again the same 128 pointers on stack, so it is better
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* to handle the function (calling pcm_readv/writev) directly in this handler.
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*/
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static int snd_pcm_ioctl_xfern_compat(struct snd_pcm_substream *substream,
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int dir, struct snd_xfern32 __user *data32)
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{
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compat_caddr_t buf;
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compat_caddr_t __user *bufptr;
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u32 frames;
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void __user **bufs;
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int err, ch, i;
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if (! substream->runtime)
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return -ENOTTY;
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if (substream->stream != dir)
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return -EINVAL;
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if ((ch = substream->runtime->channels) > 128)
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return -EINVAL;
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if (get_user(buf, &data32->bufs) ||
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get_user(frames, &data32->frames))
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return -EFAULT;
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bufptr = compat_ptr(buf);
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bufs = kmalloc(sizeof(void __user *) * ch, GFP_KERNEL);
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if (bufs == NULL)
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return -ENOMEM;
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for (i = 0; i < ch; i++) {
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u32 ptr;
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if (get_user(ptr, bufptr)) {
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kfree(bufs);
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return -EFAULT;
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}
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bufs[i] = compat_ptr(ptr);
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bufptr++;
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}
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if (dir == SNDRV_PCM_STREAM_PLAYBACK)
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err = snd_pcm_lib_writev(substream, bufs, frames);
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else
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err = snd_pcm_lib_readv(substream, bufs, frames);
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if (err >= 0) {
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if (put_user(err, &data32->result))
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err = -EFAULT;
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}
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kfree(bufs);
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return err;
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}
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struct snd_pcm_mmap_status32 {
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s32 state;
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s32 pad1;
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u32 hw_ptr;
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struct compat_timespec tstamp;
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s32 suspended_state;
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struct compat_timespec audio_tstamp;
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} __attribute__((packed));
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struct snd_pcm_mmap_control32 {
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u32 appl_ptr;
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u32 avail_min;
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};
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struct snd_pcm_sync_ptr32 {
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u32 flags;
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union {
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struct snd_pcm_mmap_status32 status;
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unsigned char reserved[64];
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} s;
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union {
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struct snd_pcm_mmap_control32 control;
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unsigned char reserved[64];
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} c;
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} __attribute__((packed));
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static int snd_pcm_ioctl_sync_ptr_compat(struct snd_pcm_substream *substream,
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struct snd_pcm_sync_ptr32 __user *src)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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volatile struct snd_pcm_mmap_status *status;
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volatile struct snd_pcm_mmap_control *control;
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u32 sflags;
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struct snd_pcm_mmap_control scontrol;
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struct snd_pcm_mmap_status sstatus;
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snd_pcm_uframes_t boundary;
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int err;
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if (snd_BUG_ON(!runtime))
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return -EINVAL;
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if (get_user(sflags, &src->flags) ||
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get_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
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get_user(scontrol.avail_min, &src->c.control.avail_min))
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return -EFAULT;
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if (sflags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
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err = snd_pcm_hwsync(substream);
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if (err < 0)
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return err;
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}
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status = runtime->status;
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control = runtime->control;
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boundary = recalculate_boundary(runtime);
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if (! boundary)
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boundary = 0x7fffffff;
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snd_pcm_stream_lock_irq(substream);
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/* FIXME: we should consider the boundary for the sync from app */
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if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL))
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control->appl_ptr = scontrol.appl_ptr;
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else
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scontrol.appl_ptr = control->appl_ptr % boundary;
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if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
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control->avail_min = scontrol.avail_min;
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else
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scontrol.avail_min = control->avail_min;
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sstatus.state = status->state;
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sstatus.hw_ptr = status->hw_ptr % boundary;
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sstatus.tstamp = status->tstamp;
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sstatus.suspended_state = status->suspended_state;
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sstatus.audio_tstamp = status->audio_tstamp;
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snd_pcm_stream_unlock_irq(substream);
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if (put_user(sstatus.state, &src->s.status.state) ||
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put_user(sstatus.hw_ptr, &src->s.status.hw_ptr) ||
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compat_put_timespec(&sstatus.tstamp, &src->s.status.tstamp) ||
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put_user(sstatus.suspended_state, &src->s.status.suspended_state) ||
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compat_put_timespec(&sstatus.audio_tstamp,
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&src->s.status.audio_tstamp) ||
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put_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
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put_user(scontrol.avail_min, &src->c.control.avail_min))
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return -EFAULT;
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return 0;
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}
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/*
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*/
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enum {
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SNDRV_PCM_IOCTL_HW_REFINE32 = _IOWR('A', 0x10, struct snd_pcm_hw_params32),
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SNDRV_PCM_IOCTL_HW_PARAMS32 = _IOWR('A', 0x11, struct snd_pcm_hw_params32),
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SNDRV_PCM_IOCTL_SW_PARAMS32 = _IOWR('A', 0x13, struct snd_pcm_sw_params32),
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SNDRV_PCM_IOCTL_STATUS32 = _IOR('A', 0x20, struct snd_pcm_status32),
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SNDRV_PCM_IOCTL_DELAY32 = _IOR('A', 0x21, s32),
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SNDRV_PCM_IOCTL_CHANNEL_INFO32 = _IOR('A', 0x32, struct snd_pcm_channel_info32),
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SNDRV_PCM_IOCTL_REWIND32 = _IOW('A', 0x46, u32),
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SNDRV_PCM_IOCTL_FORWARD32 = _IOW('A', 0x49, u32),
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SNDRV_PCM_IOCTL_WRITEI_FRAMES32 = _IOW('A', 0x50, struct snd_xferi32),
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SNDRV_PCM_IOCTL_READI_FRAMES32 = _IOR('A', 0x51, struct snd_xferi32),
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SNDRV_PCM_IOCTL_WRITEN_FRAMES32 = _IOW('A', 0x52, struct snd_xfern32),
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SNDRV_PCM_IOCTL_READN_FRAMES32 = _IOR('A', 0x53, struct snd_xfern32),
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SNDRV_PCM_IOCTL_SYNC_PTR32 = _IOWR('A', 0x23, struct snd_pcm_sync_ptr32),
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};
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static long snd_pcm_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
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{
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struct snd_pcm_file *pcm_file;
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struct snd_pcm_substream *substream;
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void __user *argp = compat_ptr(arg);
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pcm_file = file->private_data;
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if (! pcm_file)
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return -ENOTTY;
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substream = pcm_file->substream;
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if (! substream)
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return -ENOTTY;
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/*
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* When PCM is used on 32bit mode, we need to disable
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* mmap of PCM status/control records because of the size
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|
* incompatibility.
|
|
*/
|
|
pcm_file->no_compat_mmap = 1;
|
|
|
|
switch (cmd) {
|
|
case SNDRV_PCM_IOCTL_PVERSION:
|
|
case SNDRV_PCM_IOCTL_INFO:
|
|
case SNDRV_PCM_IOCTL_TSTAMP:
|
|
case SNDRV_PCM_IOCTL_TTSTAMP:
|
|
case SNDRV_PCM_IOCTL_HWSYNC:
|
|
case SNDRV_PCM_IOCTL_PREPARE:
|
|
case SNDRV_PCM_IOCTL_RESET:
|
|
case SNDRV_PCM_IOCTL_START:
|
|
case SNDRV_PCM_IOCTL_DROP:
|
|
case SNDRV_PCM_IOCTL_DRAIN:
|
|
case SNDRV_PCM_IOCTL_PAUSE:
|
|
case SNDRV_PCM_IOCTL_HW_FREE:
|
|
case SNDRV_PCM_IOCTL_RESUME:
|
|
case SNDRV_PCM_IOCTL_XRUN:
|
|
case SNDRV_PCM_IOCTL_LINK:
|
|
case SNDRV_PCM_IOCTL_UNLINK:
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
|
|
return snd_pcm_playback_ioctl1(file, substream, cmd, argp);
|
|
else
|
|
return snd_pcm_capture_ioctl1(file, substream, cmd, argp);
|
|
case SNDRV_PCM_IOCTL_HW_REFINE32:
|
|
return snd_pcm_ioctl_hw_params_compat(substream, 1, argp);
|
|
case SNDRV_PCM_IOCTL_HW_PARAMS32:
|
|
return snd_pcm_ioctl_hw_params_compat(substream, 0, argp);
|
|
case SNDRV_PCM_IOCTL_SW_PARAMS32:
|
|
return snd_pcm_ioctl_sw_params_compat(substream, argp);
|
|
case SNDRV_PCM_IOCTL_STATUS32:
|
|
return snd_pcm_status_user_compat(substream, argp);
|
|
case SNDRV_PCM_IOCTL_SYNC_PTR32:
|
|
return snd_pcm_ioctl_sync_ptr_compat(substream, argp);
|
|
case SNDRV_PCM_IOCTL_CHANNEL_INFO32:
|
|
return snd_pcm_ioctl_channel_info_compat(substream, argp);
|
|
case SNDRV_PCM_IOCTL_WRITEI_FRAMES32:
|
|
return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
|
|
case SNDRV_PCM_IOCTL_READI_FRAMES32:
|
|
return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
|
|
case SNDRV_PCM_IOCTL_WRITEN_FRAMES32:
|
|
return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
|
|
case SNDRV_PCM_IOCTL_READN_FRAMES32:
|
|
return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
|
|
case SNDRV_PCM_IOCTL_DELAY32:
|
|
return snd_pcm_ioctl_delay_compat(substream, argp);
|
|
case SNDRV_PCM_IOCTL_REWIND32:
|
|
return snd_pcm_ioctl_rewind_compat(substream, argp);
|
|
case SNDRV_PCM_IOCTL_FORWARD32:
|
|
return snd_pcm_ioctl_forward_compat(substream, argp);
|
|
}
|
|
|
|
return -ENOIOCTLCMD;
|
|
}
|