mirror of https://gitee.com/openkylin/linux.git
577 lines
16 KiB
C
577 lines
16 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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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 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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int err;
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err = snd_pcm_delay(substream, &delay);
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if (err)
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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 0;
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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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err = snd_pcm_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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err = snd_pcm_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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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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#ifdef CONFIG_X86_X32
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/* X32 ABI has the same struct as x86-64 for snd_pcm_channel_info */
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static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
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struct snd_pcm_channel_info __user *src);
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#define snd_pcm_ioctl_channel_info_x32(s, p) \
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snd_pcm_channel_info_user(s, p)
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#endif /* CONFIG_X86_X32 */
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struct compat_snd_pcm_status64 {
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s32 state;
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u8 rsvd[4]; /* alignment */
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s64 trigger_tstamp_sec;
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s64 trigger_tstamp_nsec;
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s64 tstamp_sec;
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s64 tstamp_nsec;
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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 audio_tstamp_data;
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s64 audio_tstamp_sec;
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s64 audio_tstamp_nsec;
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s64 driver_tstamp_sec;
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s64 driver_tstamp_nsec;
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u32 audio_tstamp_accuracy;
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unsigned char reserved[52-4*sizeof(s64)];
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} __packed;
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static int snd_pcm_status_user_compat64(struct snd_pcm_substream *substream,
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struct compat_snd_pcm_status64 __user *src,
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bool ext)
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{
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struct snd_pcm_status64 status;
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struct compat_snd_pcm_status64 compat_status64;
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int err;
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memset(&status, 0, sizeof(status));
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memset(&compat_status64, 0, sizeof(compat_status64));
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/*
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* with extension, parameters are read/write,
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* get audio_tstamp_data from user,
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* ignore rest of status structure
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*/
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if (ext && get_user(status.audio_tstamp_data,
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(u32 __user *)(&src->audio_tstamp_data)))
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return -EFAULT;
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err = snd_pcm_status64(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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compat_status64 = (struct compat_snd_pcm_status64) {
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.state = status.state,
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.trigger_tstamp_sec = status.trigger_tstamp_sec,
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.trigger_tstamp_nsec = status.trigger_tstamp_nsec,
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.tstamp_sec = status.tstamp_sec,
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.tstamp_nsec = status.tstamp_nsec,
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.appl_ptr = status.appl_ptr,
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.hw_ptr = status.hw_ptr,
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.delay = status.delay,
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.avail = status.avail,
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.avail_max = status.avail_max,
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.overrange = status.overrange,
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.suspended_state = status.suspended_state,
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.audio_tstamp_data = status.audio_tstamp_data,
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.audio_tstamp_sec = status.audio_tstamp_sec,
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.audio_tstamp_nsec = status.audio_tstamp_nsec,
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.driver_tstamp_sec = status.audio_tstamp_sec,
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.driver_tstamp_nsec = status.audio_tstamp_nsec,
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.audio_tstamp_accuracy = status.audio_tstamp_accuracy,
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};
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if (copy_to_user(src, &compat_status64, sizeof(compat_status64)))
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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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data = kmalloc(sizeof(*data), GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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/* only fifo_size (RO from userspace) is different, so just copy all */
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if (copy_from_user(data, data32, sizeof(*data32))) {
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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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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 (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN)
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return -EBADFD;
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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_array(ch, sizeof(void __user *), 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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#ifdef CONFIG_X86_X32
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/* X32 ABI has 64bit timespec and 64bit alignment */
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struct snd_pcm_mmap_status_x32 {
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s32 state;
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s32 pad1;
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u32 hw_ptr;
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u32 pad2; /* alignment */
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s64 tstamp_sec;
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s64 tstamp_nsec;
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s32 suspended_state;
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s32 pad3;
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s64 audio_tstamp_sec;
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s64 audio_tstamp_nsec;
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} __packed;
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struct snd_pcm_mmap_control_x32 {
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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_ptr_x32 {
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u32 flags;
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u32 rsvd; /* alignment */
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union {
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struct snd_pcm_mmap_status_x32 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_control_x32 control;
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unsigned char reserved[64];
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} c;
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} __packed;
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static int snd_pcm_ioctl_sync_ptr_x32(struct snd_pcm_substream *substream,
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struct snd_pcm_sync_ptr_x32 __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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put_user(sstatus.tstamp.tv_sec, &src->s.status.tstamp_sec) ||
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put_user(sstatus.tstamp.tv_nsec, &src->s.status.tstamp_nsec) ||
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put_user(sstatus.suspended_state, &src->s.status.suspended_state) ||
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put_user(sstatus.audio_tstamp.tv_sec, &src->s.status.audio_tstamp_sec) ||
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put_user(sstatus.audio_tstamp.tv_nsec, &src->s.status.audio_tstamp_nsec) ||
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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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#endif /* CONFIG_X86_X32 */
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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_STATUS_COMPAT32 = _IOR('A', 0x20, struct snd_pcm_status32),
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SNDRV_PCM_IOCTL_STATUS_EXT_COMPAT32 = _IOWR('A', 0x24, 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),
|
|
SNDRV_PCM_IOCTL_WRITEI_FRAMES32 = _IOW('A', 0x50, struct snd_xferi32),
|
|
SNDRV_PCM_IOCTL_READI_FRAMES32 = _IOR('A', 0x51, struct snd_xferi32),
|
|
SNDRV_PCM_IOCTL_WRITEN_FRAMES32 = _IOW('A', 0x52, struct snd_xfern32),
|
|
SNDRV_PCM_IOCTL_READN_FRAMES32 = _IOR('A', 0x53, struct snd_xfern32),
|
|
SNDRV_PCM_IOCTL_STATUS_COMPAT64 = _IOR('A', 0x20, struct compat_snd_pcm_status64),
|
|
SNDRV_PCM_IOCTL_STATUS_EXT_COMPAT64 = _IOWR('A', 0x24, struct compat_snd_pcm_status64),
|
|
#ifdef CONFIG_X86_X32
|
|
SNDRV_PCM_IOCTL_CHANNEL_INFO_X32 = _IOR('A', 0x32, struct snd_pcm_channel_info),
|
|
SNDRV_PCM_IOCTL_SYNC_PTR_X32 = _IOWR('A', 0x23, struct snd_pcm_sync_ptr_x32),
|
|
#endif /* CONFIG_X86_X32 */
|
|
};
|
|
|
|
static long snd_pcm_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct snd_pcm_file *pcm_file;
|
|
struct snd_pcm_substream *substream;
|
|
void __user *argp = compat_ptr(arg);
|
|
|
|
pcm_file = file->private_data;
|
|
if (! pcm_file)
|
|
return -ENOTTY;
|
|
substream = pcm_file->substream;
|
|
if (! substream)
|
|
return -ENOTTY;
|
|
|
|
/*
|
|
* When PCM is used on 32bit mode, we need to disable
|
|
* mmap of the old PCM status/control records because
|
|
* of the size 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_USER_PVERSION:
|
|
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:
|
|
case __SNDRV_PCM_IOCTL_SYNC_PTR32:
|
|
return snd_pcm_common_ioctl(file, substream, cmd, argp);
|
|
case __SNDRV_PCM_IOCTL_SYNC_PTR64:
|
|
#ifdef CONFIG_X86_X32
|
|
if (in_x32_syscall())
|
|
return snd_pcm_ioctl_sync_ptr_x32(substream, argp);
|
|
#endif /* CONFIG_X86_X32 */
|
|
return snd_pcm_common_ioctl(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_STATUS_COMPAT32:
|
|
return snd_pcm_status_user32(substream, argp, false);
|
|
case SNDRV_PCM_IOCTL_STATUS_EXT_COMPAT32:
|
|
return snd_pcm_status_user32(substream, argp, true);
|
|
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);
|
|
case SNDRV_PCM_IOCTL_STATUS_COMPAT64:
|
|
return snd_pcm_status_user_compat64(substream, argp, false);
|
|
case SNDRV_PCM_IOCTL_STATUS_EXT_COMPAT64:
|
|
return snd_pcm_status_user_compat64(substream, argp, true);
|
|
#ifdef CONFIG_X86_X32
|
|
case SNDRV_PCM_IOCTL_CHANNEL_INFO_X32:
|
|
return snd_pcm_ioctl_channel_info_x32(substream, argp);
|
|
#endif /* CONFIG_X86_X32 */
|
|
}
|
|
|
|
return -ENOIOCTLCMD;
|
|
}
|