4143 lines
114 KiB
C
4143 lines
114 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Digital Audio (PCM) abstract layer
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* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
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*/
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#include <linux/compat.h>
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#include <linux/mm.h>
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#include <linux/module.h>
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#include <linux/file.h>
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#include <linux/slab.h>
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#include <linux/sched/signal.h>
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#include <linux/time.h>
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#include <linux/pm_qos.h>
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#include <linux/io.h>
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#include <linux/dma-mapping.h>
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#include <linux/vmalloc.h>
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#include <sound/core.h>
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#include <sound/control.h>
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#include <sound/info.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/timer.h>
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#include <sound/minors.h>
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#include <linux/uio.h>
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#include <linux/delay.h>
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#include "pcm_local.h"
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#ifdef CONFIG_SND_DEBUG
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#define CREATE_TRACE_POINTS
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#include "pcm_param_trace.h"
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#else
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#define trace_hw_mask_param_enabled() 0
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#define trace_hw_interval_param_enabled() 0
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#define trace_hw_mask_param(substream, type, index, prev, curr)
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#define trace_hw_interval_param(substream, type, index, prev, curr)
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#endif
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/*
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* Compatibility
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*/
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struct snd_pcm_hw_params_old {
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unsigned int flags;
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unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
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SNDRV_PCM_HW_PARAM_ACCESS + 1];
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struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
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SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
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unsigned int rmask;
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unsigned int cmask;
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unsigned int info;
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unsigned int msbits;
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unsigned int rate_num;
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unsigned int rate_den;
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snd_pcm_uframes_t fifo_size;
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unsigned char reserved[64];
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};
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#ifdef CONFIG_SND_SUPPORT_OLD_API
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#define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
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#define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
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static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params_old __user * _oparams);
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static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params_old __user * _oparams);
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#endif
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static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
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/*
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*
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*/
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static DECLARE_RWSEM(snd_pcm_link_rwsem);
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void snd_pcm_group_init(struct snd_pcm_group *group)
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{
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spin_lock_init(&group->lock);
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mutex_init(&group->mutex);
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INIT_LIST_HEAD(&group->substreams);
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refcount_set(&group->refs, 1);
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}
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/* define group lock helpers */
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#define DEFINE_PCM_GROUP_LOCK(action, mutex_action) \
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static void snd_pcm_group_ ## action(struct snd_pcm_group *group, bool nonatomic) \
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{ \
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if (nonatomic) \
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mutex_ ## mutex_action(&group->mutex); \
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else \
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spin_ ## action(&group->lock); \
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}
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DEFINE_PCM_GROUP_LOCK(lock, lock);
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DEFINE_PCM_GROUP_LOCK(unlock, unlock);
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DEFINE_PCM_GROUP_LOCK(lock_irq, lock);
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DEFINE_PCM_GROUP_LOCK(unlock_irq, unlock);
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/**
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* snd_pcm_stream_lock - Lock the PCM stream
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* @substream: PCM substream
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*
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* This locks the PCM stream's spinlock or mutex depending on the nonatomic
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* flag of the given substream. This also takes the global link rw lock
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* (or rw sem), too, for avoiding the race with linked streams.
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*/
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void snd_pcm_stream_lock(struct snd_pcm_substream *substream)
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{
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snd_pcm_group_lock(&substream->self_group, substream->pcm->nonatomic);
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}
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EXPORT_SYMBOL_GPL(snd_pcm_stream_lock);
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/**
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* snd_pcm_stream_unlock - Unlock the PCM stream
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* @substream: PCM substream
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*
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* This unlocks the PCM stream that has been locked via snd_pcm_stream_lock().
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*/
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void snd_pcm_stream_unlock(struct snd_pcm_substream *substream)
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{
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snd_pcm_group_unlock(&substream->self_group, substream->pcm->nonatomic);
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}
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EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock);
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/**
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* snd_pcm_stream_lock_irq - Lock the PCM stream
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* @substream: PCM substream
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*
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* This locks the PCM stream like snd_pcm_stream_lock() and disables the local
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* IRQ (only when nonatomic is false). In nonatomic case, this is identical
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* as snd_pcm_stream_lock().
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*/
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void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream)
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{
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snd_pcm_group_lock_irq(&substream->self_group,
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substream->pcm->nonatomic);
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}
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EXPORT_SYMBOL_GPL(snd_pcm_stream_lock_irq);
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static void snd_pcm_stream_lock_nested(struct snd_pcm_substream *substream)
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{
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struct snd_pcm_group *group = &substream->self_group;
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if (substream->pcm->nonatomic)
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mutex_lock_nested(&group->mutex, SINGLE_DEPTH_NESTING);
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else
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spin_lock_nested(&group->lock, SINGLE_DEPTH_NESTING);
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}
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/**
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* snd_pcm_stream_unlock_irq - Unlock the PCM stream
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* @substream: PCM substream
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*
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* This is a counter-part of snd_pcm_stream_lock_irq().
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*/
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void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream)
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{
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snd_pcm_group_unlock_irq(&substream->self_group,
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substream->pcm->nonatomic);
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}
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EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irq);
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unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream)
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{
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unsigned long flags = 0;
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if (substream->pcm->nonatomic)
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mutex_lock(&substream->self_group.mutex);
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else
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spin_lock_irqsave(&substream->self_group.lock, flags);
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return flags;
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}
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EXPORT_SYMBOL_GPL(_snd_pcm_stream_lock_irqsave);
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unsigned long _snd_pcm_stream_lock_irqsave_nested(struct snd_pcm_substream *substream)
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{
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unsigned long flags = 0;
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if (substream->pcm->nonatomic)
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mutex_lock_nested(&substream->self_group.mutex,
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SINGLE_DEPTH_NESTING);
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else
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spin_lock_irqsave_nested(&substream->self_group.lock, flags,
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SINGLE_DEPTH_NESTING);
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return flags;
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}
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EXPORT_SYMBOL_GPL(_snd_pcm_stream_lock_irqsave_nested);
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/**
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* snd_pcm_stream_unlock_irqrestore - Unlock the PCM stream
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* @substream: PCM substream
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* @flags: irq flags
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*
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* This is a counter-part of snd_pcm_stream_lock_irqsave().
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*/
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void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream,
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unsigned long flags)
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{
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if (substream->pcm->nonatomic)
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mutex_unlock(&substream->self_group.mutex);
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else
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spin_unlock_irqrestore(&substream->self_group.lock, flags);
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}
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EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irqrestore);
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/* Run PCM ioctl ops */
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static int snd_pcm_ops_ioctl(struct snd_pcm_substream *substream,
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unsigned cmd, void *arg)
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{
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if (substream->ops->ioctl)
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return substream->ops->ioctl(substream, cmd, arg);
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else
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return snd_pcm_lib_ioctl(substream, cmd, arg);
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}
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int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
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{
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struct snd_pcm *pcm = substream->pcm;
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struct snd_pcm_str *pstr = substream->pstr;
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memset(info, 0, sizeof(*info));
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info->card = pcm->card->number;
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info->device = pcm->device;
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info->stream = substream->stream;
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info->subdevice = substream->number;
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strscpy(info->id, pcm->id, sizeof(info->id));
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strscpy(info->name, pcm->name, sizeof(info->name));
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info->dev_class = pcm->dev_class;
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info->dev_subclass = pcm->dev_subclass;
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info->subdevices_count = pstr->substream_count;
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info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
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strscpy(info->subname, substream->name, sizeof(info->subname));
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return 0;
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}
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int snd_pcm_info_user(struct snd_pcm_substream *substream,
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struct snd_pcm_info __user * _info)
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{
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struct snd_pcm_info *info;
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int err;
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info = kmalloc(sizeof(*info), GFP_KERNEL);
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if (! info)
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return -ENOMEM;
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err = snd_pcm_info(substream, info);
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if (err >= 0) {
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if (copy_to_user(_info, info, sizeof(*info)))
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err = -EFAULT;
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}
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kfree(info);
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return err;
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}
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/* macro for simplified cast */
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#define PARAM_MASK_BIT(b) (1U << (__force int)(b))
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static bool hw_support_mmap(struct snd_pcm_substream *substream)
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{
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struct snd_dma_buffer *dmabuf;
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if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_MMAP))
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return false;
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if (substream->ops->mmap || substream->ops->page)
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return true;
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dmabuf = snd_pcm_get_dma_buf(substream);
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if (!dmabuf)
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dmabuf = &substream->dma_buffer;
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switch (dmabuf->dev.type) {
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case SNDRV_DMA_TYPE_UNKNOWN:
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/* we can't know the device, so just assume that the driver does
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* everything right
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*/
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return true;
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case SNDRV_DMA_TYPE_CONTINUOUS:
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case SNDRV_DMA_TYPE_VMALLOC:
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return true;
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default:
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return dma_can_mmap(dmabuf->dev.dev);
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}
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}
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static int constrain_mask_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params)
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{
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struct snd_pcm_hw_constraints *constrs =
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&substream->runtime->hw_constraints;
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struct snd_mask *m;
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unsigned int k;
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struct snd_mask old_mask;
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int changed;
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for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
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m = hw_param_mask(params, k);
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if (snd_mask_empty(m))
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return -EINVAL;
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/* This parameter is not requested to change by a caller. */
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if (!(params->rmask & PARAM_MASK_BIT(k)))
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continue;
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if (trace_hw_mask_param_enabled())
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old_mask = *m;
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changed = snd_mask_refine(m, constrs_mask(constrs, k));
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if (changed < 0)
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return changed;
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if (changed == 0)
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continue;
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/* Set corresponding flag so that the caller gets it. */
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trace_hw_mask_param(substream, k, 0, &old_mask, m);
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params->cmask |= PARAM_MASK_BIT(k);
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}
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return 0;
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}
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static int constrain_interval_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params)
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{
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struct snd_pcm_hw_constraints *constrs =
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&substream->runtime->hw_constraints;
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struct snd_interval *i;
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unsigned int k;
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struct snd_interval old_interval;
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int changed;
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for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
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i = hw_param_interval(params, k);
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if (snd_interval_empty(i))
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return -EINVAL;
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/* This parameter is not requested to change by a caller. */
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if (!(params->rmask & PARAM_MASK_BIT(k)))
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continue;
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if (trace_hw_interval_param_enabled())
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old_interval = *i;
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changed = snd_interval_refine(i, constrs_interval(constrs, k));
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if (changed < 0)
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return changed;
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if (changed == 0)
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continue;
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/* Set corresponding flag so that the caller gets it. */
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trace_hw_interval_param(substream, k, 0, &old_interval, i);
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params->cmask |= PARAM_MASK_BIT(k);
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}
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return 0;
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}
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static int constrain_params_by_rules(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params)
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{
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struct snd_pcm_hw_constraints *constrs =
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&substream->runtime->hw_constraints;
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unsigned int k;
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unsigned int *rstamps;
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unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
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unsigned int stamp;
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struct snd_pcm_hw_rule *r;
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unsigned int d;
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struct snd_mask old_mask;
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struct snd_interval old_interval;
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bool again;
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int changed, err = 0;
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/*
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* Each application of rule has own sequence number.
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*
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* Each member of 'rstamps' array represents the sequence number of
|
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* recent application of corresponding rule.
|
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*/
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rstamps = kcalloc(constrs->rules_num, sizeof(unsigned int), GFP_KERNEL);
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if (!rstamps)
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return -ENOMEM;
|
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/*
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* Each member of 'vstamps' array represents the sequence number of
|
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* recent application of rule in which corresponding parameters were
|
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* changed.
|
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*
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* In initial state, elements corresponding to parameters requested by
|
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* a caller is 1. For unrequested parameters, corresponding members
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* have 0 so that the parameters are never changed anymore.
|
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*/
|
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for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
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vstamps[k] = (params->rmask & PARAM_MASK_BIT(k)) ? 1 : 0;
|
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/* Due to the above design, actual sequence number starts at 2. */
|
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stamp = 2;
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retry:
|
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/* Apply all rules in order. */
|
||
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again = false;
|
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for (k = 0; k < constrs->rules_num; k++) {
|
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r = &constrs->rules[k];
|
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|
|
||
|
/*
|
||
|
* Check condition bits of this rule. When the rule has
|
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|
* some condition bits, parameter without the bits is
|
||
|
* never processed. SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP
|
||
|
* is an example of the condition bits.
|
||
|
*/
|
||
|
if (r->cond && !(r->cond & params->flags))
|
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|
continue;
|
||
|
|
||
|
/*
|
||
|
* The 'deps' array includes maximum four dependencies
|
||
|
* to SNDRV_PCM_HW_PARAM_XXXs for this rule. The fifth
|
||
|
* member of this array is a sentinel and should be
|
||
|
* negative value.
|
||
|
*
|
||
|
* This rule should be processed in this time when dependent
|
||
|
* parameters were changed at former applications of the other
|
||
|
* rules.
|
||
|
*/
|
||
|
for (d = 0; r->deps[d] >= 0; d++) {
|
||
|
if (vstamps[r->deps[d]] > rstamps[k])
|
||
|
break;
|
||
|
}
|
||
|
if (r->deps[d] < 0)
|
||
|
continue;
|
||
|
|
||
|
if (trace_hw_mask_param_enabled()) {
|
||
|
if (hw_is_mask(r->var))
|
||
|
old_mask = *hw_param_mask(params, r->var);
|
||
|
}
|
||
|
if (trace_hw_interval_param_enabled()) {
|
||
|
if (hw_is_interval(r->var))
|
||
|
old_interval = *hw_param_interval(params, r->var);
|
||
|
}
|
||
|
|
||
|
changed = r->func(params, r);
|
||
|
if (changed < 0) {
|
||
|
err = changed;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* When the parameter is changed, notify it to the caller
|
||
|
* by corresponding returned bit, then preparing for next
|
||
|
* iteration.
|
||
|
*/
|
||
|
if (changed && r->var >= 0) {
|
||
|
if (hw_is_mask(r->var)) {
|
||
|
trace_hw_mask_param(substream, r->var,
|
||
|
k + 1, &old_mask,
|
||
|
hw_param_mask(params, r->var));
|
||
|
}
|
||
|
if (hw_is_interval(r->var)) {
|
||
|
trace_hw_interval_param(substream, r->var,
|
||
|
k + 1, &old_interval,
|
||
|
hw_param_interval(params, r->var));
|
||
|
}
|
||
|
|
||
|
params->cmask |= PARAM_MASK_BIT(r->var);
|
||
|
vstamps[r->var] = stamp;
|
||
|
again = true;
|
||
|
}
|
||
|
|
||
|
rstamps[k] = stamp++;
|
||
|
}
|
||
|
|
||
|
/* Iterate to evaluate all rules till no parameters are changed. */
|
||
|
if (again)
|
||
|
goto retry;
|
||
|
|
||
|
out:
|
||
|
kfree(rstamps);
|
||
|
return err;
|
||
|
}
|
||
|
|
||
|
static int fixup_unreferenced_params(struct snd_pcm_substream *substream,
|
||
|
struct snd_pcm_hw_params *params)
|
||
|
{
|
||
|
const struct snd_interval *i;
|
||
|
const struct snd_mask *m;
|
||
|
int err;
|
||
|
|
||
|
if (!params->msbits) {
|
||
|
i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
|
||
|
if (snd_interval_single(i))
|
||
|
params->msbits = snd_interval_value(i);
|
||
|
}
|
||
|
|
||
|
if (!params->rate_den) {
|
||
|
i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE);
|
||
|
if (snd_interval_single(i)) {
|
||
|
params->rate_num = snd_interval_value(i);
|
||
|
params->rate_den = 1;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if (!params->fifo_size) {
|
||
|
m = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT);
|
||
|
i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS);
|
||
|
if (snd_mask_single(m) && snd_interval_single(i)) {
|
||
|
err = snd_pcm_ops_ioctl(substream,
|
||
|
SNDRV_PCM_IOCTL1_FIFO_SIZE,
|
||
|
params);
|
||
|
if (err < 0)
|
||
|
return err;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if (!params->info) {
|
||
|
params->info = substream->runtime->hw.info;
|
||
|
params->info &= ~(SNDRV_PCM_INFO_FIFO_IN_FRAMES |
|
||
|
SNDRV_PCM_INFO_DRAIN_TRIGGER);
|
||
|
if (!hw_support_mmap(substream))
|
||
|
params->info &= ~(SNDRV_PCM_INFO_MMAP |
|
||
|
SNDRV_PCM_INFO_MMAP_VALID);
|
||
|
}
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
|
||
|
struct snd_pcm_hw_params *params)
|
||
|
{
|
||
|
int err;
|
||
|
|
||
|
params->info = 0;
|
||
|
params->fifo_size = 0;
|
||
|
if (params->rmask & PARAM_MASK_BIT(SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
|
||
|
params->msbits = 0;
|
||
|
if (params->rmask & PARAM_MASK_BIT(SNDRV_PCM_HW_PARAM_RATE)) {
|
||
|
params->rate_num = 0;
|
||
|
params->rate_den = 0;
|
||
|
}
|
||
|
|
||
|
err = constrain_mask_params(substream, params);
|
||
|
if (err < 0)
|
||
|
return err;
|
||
|
|
||
|
err = constrain_interval_params(substream, params);
|
||
|
if (err < 0)
|
||
|
return err;
|
||
|
|
||
|
err = constrain_params_by_rules(substream, params);
|
||
|
if (err < 0)
|
||
|
return err;
|
||
|
|
||
|
params->rmask = 0;
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
EXPORT_SYMBOL(snd_pcm_hw_refine);
|
||
|
|
||
|
static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
|
||
|
struct snd_pcm_hw_params __user * _params)
|
||
|
{
|
||
|
struct snd_pcm_hw_params *params;
|
||
|
int err;
|
||
|
|
||
|
params = memdup_user(_params, sizeof(*params));
|
||
|
if (IS_ERR(params))
|
||
|
return PTR_ERR(params);
|
||
|
|
||
|
err = snd_pcm_hw_refine(substream, params);
|
||
|
if (err < 0)
|
||
|
goto end;
|
||
|
|
||
|
err = fixup_unreferenced_params(substream, params);
|
||
|
if (err < 0)
|
||
|
goto end;
|
||
|
|
||
|
if (copy_to_user(_params, params, sizeof(*params)))
|
||
|
err = -EFAULT;
|
||
|
end:
|
||
|
kfree(params);
|
||
|
return err;
|
||
|
}
|
||
|
|
||
|
static int period_to_usecs(struct snd_pcm_runtime *runtime)
|
||
|
{
|
||
|
int usecs;
|
||
|
|
||
|
if (! runtime->rate)
|
||
|
return -1; /* invalid */
|
||
|
|
||
|
/* take 75% of period time as the deadline */
|
||
|
usecs = (750000 / runtime->rate) * runtime->period_size;
|
||
|
usecs += ((750000 % runtime->rate) * runtime->period_size) /
|
||
|
runtime->rate;
|
||
|
|
||
|
return usecs;
|
||
|
}
|
||
|
|
||
|
static void snd_pcm_set_state(struct snd_pcm_substream *substream,
|
||
|
snd_pcm_state_t state)
|
||
|
{
|
||
|
snd_pcm_stream_lock_irq(substream);
|
||
|
if (substream->runtime->state != SNDRV_PCM_STATE_DISCONNECTED)
|
||
|
__snd_pcm_set_state(substream->runtime, state);
|
||
|
snd_pcm_stream_unlock_irq(substream);
|
||
|
}
|
||
|
|
||
|
static inline void snd_pcm_timer_notify(struct snd_pcm_substream *substream,
|
||
|
int event)
|
||
|
{
|
||
|
#ifdef CONFIG_SND_PCM_TIMER
|
||
|
if (substream->timer)
|
||
|
snd_timer_notify(substream->timer, event,
|
||
|
&substream->runtime->trigger_tstamp);
|
||
|
#endif
|
||
|
}
|
||
|
|
||
|
void snd_pcm_sync_stop(struct snd_pcm_substream *substream, bool sync_irq)
|
||
|
{
|
||
|
if (substream->runtime && substream->runtime->stop_operating) {
|
||
|
substream->runtime->stop_operating = false;
|
||
|
if (substream->ops && substream->ops->sync_stop)
|
||
|
substream->ops->sync_stop(substream);
|
||
|
else if (sync_irq && substream->pcm->card->sync_irq > 0)
|
||
|
synchronize_irq(substream->pcm->card->sync_irq);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* snd_pcm_hw_params_choose - choose a configuration defined by @params
|
||
|
* @pcm: PCM instance
|
||
|
* @params: the hw_params instance
|
||
|
*
|
||
|
* Choose one configuration from configuration space defined by @params.
|
||
|
* The configuration chosen is that obtained fixing in this order:
|
||
|
* first access, first format, first subformat, min channels,
|
||
|
* min rate, min period time, max buffer size, min tick time
|
||
|
*
|
||
|
* Return: Zero if successful, or a negative error code on failure.
|
||
|
*/
|
||
|
static int snd_pcm_hw_params_choose(struct snd_pcm_substream *pcm,
|
||
|
struct snd_pcm_hw_params *params)
|
||
|
{
|
||
|
static const int vars[] = {
|
||
|
SNDRV_PCM_HW_PARAM_ACCESS,
|
||
|
SNDRV_PCM_HW_PARAM_FORMAT,
|
||
|
SNDRV_PCM_HW_PARAM_SUBFORMAT,
|
||
|
SNDRV_PCM_HW_PARAM_CHANNELS,
|
||
|
SNDRV_PCM_HW_PARAM_RATE,
|
||
|
SNDRV_PCM_HW_PARAM_PERIOD_TIME,
|
||
|
SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
|
||
|
SNDRV_PCM_HW_PARAM_TICK_TIME,
|
||
|
-1
|
||
|
};
|
||
|
const int *v;
|
||
|
struct snd_mask old_mask;
|
||
|
struct snd_interval old_interval;
|
||
|
int changed;
|
||
|
|
||
|
for (v = vars; *v != -1; v++) {
|
||
|
/* Keep old parameter to trace. */
|
||
|
if (trace_hw_mask_param_enabled()) {
|
||
|
if (hw_is_mask(*v))
|
||
|
old_mask = *hw_param_mask(params, *v);
|
||
|
}
|
||
|
if (trace_hw_interval_param_enabled()) {
|
||
|
if (hw_is_interval(*v))
|
||
|
old_interval = *hw_param_interval(params, *v);
|
||
|
}
|
||
|
if (*v != SNDRV_PCM_HW_PARAM_BUFFER_SIZE)
|
||
|
changed = snd_pcm_hw_param_first(pcm, params, *v, NULL);
|
||
|
else
|
||
|
changed = snd_pcm_hw_param_last(pcm, params, *v, NULL);
|
||
|
if (changed < 0)
|
||
|
return changed;
|
||
|
if (changed == 0)
|
||
|
continue;
|
||
|
|
||
|
/* Trace the changed parameter. */
|
||
|
if (hw_is_mask(*v)) {
|
||
|
trace_hw_mask_param(pcm, *v, 0, &old_mask,
|
||
|
hw_param_mask(params, *v));
|
||
|
}
|
||
|
if (hw_is_interval(*v)) {
|
||
|
trace_hw_interval_param(pcm, *v, 0, &old_interval,
|
||
|
hw_param_interval(params, *v));
|
||
|
}
|
||
|
}
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
/* acquire buffer_mutex; if it's in r/w operation, return -EBUSY, otherwise
|
||
|
* block the further r/w operations
|
||
|
*/
|
||
|
static int snd_pcm_buffer_access_lock(struct snd_pcm_runtime *runtime)
|
||
|
{
|
||
|
if (!atomic_dec_unless_positive(&runtime->buffer_accessing))
|
||
|
return -EBUSY;
|
||
|
mutex_lock(&runtime->buffer_mutex);
|
||
|
return 0; /* keep buffer_mutex, unlocked by below */
|
||
|
}
|
||
|
|
||
|
/* release buffer_mutex and clear r/w access flag */
|
||
|
static void snd_pcm_buffer_access_unlock(struct snd_pcm_runtime *runtime)
|
||
|
{
|
||
|
mutex_unlock(&runtime->buffer_mutex);
|
||
|
atomic_inc(&runtime->buffer_accessing);
|
||
|
}
|
||
|
|
||
|
#if IS_ENABLED(CONFIG_SND_PCM_OSS)
|
||
|
#define is_oss_stream(substream) ((substream)->oss.oss)
|
||
|
#else
|
||
|
#define is_oss_stream(substream) false
|
||
|
#endif
|
||
|
|
||
|
static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
|
||
|
struct snd_pcm_hw_params *params)
|
||
|
{
|
||
|
struct snd_pcm_runtime *runtime;
|
||
|
int err, usecs;
|
||
|
unsigned int bits;
|
||
|
snd_pcm_uframes_t frames;
|
||
|
|
||
|
if (PCM_RUNTIME_CHECK(substream))
|
||
|
return -ENXIO;
|
||
|
runtime = substream->runtime;
|
||
|
err = snd_pcm_buffer_access_lock(runtime);
|
||
|
if (err < 0)
|
||
|
return err;
|
||
|
snd_pcm_stream_lock_irq(substream);
|
||
|
switch (runtime->state) {
|
||
|
case SNDRV_PCM_STATE_OPEN:
|
||
|
case SNDRV_PCM_STATE_SETUP:
|
||
|
case SNDRV_PCM_STATE_PREPARED:
|
||
|
if (!is_oss_stream(substream) &&
|
||
|
atomic_read(&substream->mmap_count))
|
||
|
err = -EBADFD;
|
||
|
break;
|
||
|
default:
|
||
|
err = -EBADFD;
|
||
|
break;
|
||
|
}
|
||
|
snd_pcm_stream_unlock_irq(substream);
|
||
|
if (err)
|
||
|
goto unlock;
|
||
|
|
||
|
snd_pcm_sync_stop(substream, true);
|
||
|
|
||
|
params->rmask = ~0U;
|
||
|
err = snd_pcm_hw_refine(substream, params);
|
||
|
if (err < 0)
|
||
|
goto _error;
|
||
|
|
||
|
err = snd_pcm_hw_params_choose(substream, params);
|
||
|
if (err < 0)
|
||
|
goto _error;
|
||
|
|
||
|
err = fixup_unreferenced_params(substream, params);
|
||
|
if (err < 0)
|
||
|
goto _error;
|
||
|
|
||
|
if (substream->managed_buffer_alloc) {
|
||
|
err = snd_pcm_lib_malloc_pages(substream,
|
||
|
params_buffer_bytes(params));
|
||
|
if (err < 0)
|
||
|
goto _error;
|
||
|
runtime->buffer_changed = err > 0;
|
||
|
}
|
||
|
|
||
|
if (substream->ops->hw_params != NULL) {
|
||
|
err = substream->ops->hw_params(substream, params);
|
||
|
if (err < 0)
|
||
|
goto _error;
|
||
|
}
|
||
|
|
||
|
runtime->access = params_access(params);
|
||
|
runtime->format = params_format(params);
|
||
|
runtime->subformat = params_subformat(params);
|
||
|
runtime->channels = params_channels(params);
|
||
|
runtime->rate = params_rate(params);
|
||
|
runtime->period_size = params_period_size(params);
|
||
|
runtime->periods = params_periods(params);
|
||
|
runtime->buffer_size = params_buffer_size(params);
|
||
|
runtime->info = params->info;
|
||
|
runtime->rate_num = params->rate_num;
|
||
|
runtime->rate_den = params->rate_den;
|
||
|
runtime->no_period_wakeup =
|
||
|
(params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
|
||
|
(params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
|
||
|
|
||
|
bits = snd_pcm_format_physical_width(runtime->format);
|
||
|
runtime->sample_bits = bits;
|
||
|
bits *= runtime->channels;
|
||
|
runtime->frame_bits = bits;
|
||
|
frames = 1;
|
||
|
while (bits % 8 != 0) {
|
||
|
bits *= 2;
|
||
|
frames *= 2;
|
||
|
}
|
||
|
runtime->byte_align = bits / 8;
|
||
|
runtime->min_align = frames;
|
||
|
|
||
|
/* Default sw params */
|
||
|
runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
|
||
|
runtime->period_step = 1;
|
||
|
runtime->control->avail_min = runtime->period_size;
|
||
|
runtime->start_threshold = 1;
|
||
|
runtime->stop_threshold = runtime->buffer_size;
|
||
|
runtime->silence_threshold = 0;
|
||
|
runtime->silence_size = 0;
|
||
|
runtime->boundary = runtime->buffer_size;
|
||
|
while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
|
||
|
runtime->boundary *= 2;
|
||
|
|
||
|
/* clear the buffer for avoiding possible kernel info leaks */
|
||
|
if (runtime->dma_area && !substream->ops->copy_user) {
|
||
|
size_t size = runtime->dma_bytes;
|
||
|
|
||
|
if (runtime->info & SNDRV_PCM_INFO_MMAP)
|
||
|
size = PAGE_ALIGN(size);
|
||
|
memset(runtime->dma_area, 0, size);
|
||
|
}
|
||
|
|
||
|
snd_pcm_timer_resolution_change(substream);
|
||
|
snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP);
|
||
|
|
||
|
if (cpu_latency_qos_request_active(&substream->latency_pm_qos_req))
|
||
|
cpu_latency_qos_remove_request(&substream->latency_pm_qos_req);
|
||
|
usecs = period_to_usecs(runtime);
|
||
|
if (usecs >= 0)
|
||
|
cpu_latency_qos_add_request(&substream->latency_pm_qos_req,
|
||
|
usecs);
|
||
|
err = 0;
|
||
|
_error:
|
||
|
if (err) {
|
||
|
/* hardware might be unusable from this time,
|
||
|
* so we force application to retry to set
|
||
|
* the correct hardware parameter settings
|
||
|
*/
|
||
|
snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
|
||
|
if (substream->ops->hw_free != NULL)
|
||
|
substream->ops->hw_free(substream);
|
||
|
if (substream->managed_buffer_alloc)
|
||
|
snd_pcm_lib_free_pages(substream);
|
||
|
}
|
||
|
unlock:
|
||
|
snd_pcm_buffer_access_unlock(runtime);
|
||
|
return err;
|
||
|
}
|
||
|
|
||
|
static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
|
||
|
struct snd_pcm_hw_params __user * _params)
|
||
|
{
|
||
|
struct snd_pcm_hw_params *params;
|
||
|
int err;
|
||
|
|
||
|
params = memdup_user(_params, sizeof(*params));
|
||
|
if (IS_ERR(params))
|
||
|
return PTR_ERR(params);
|
||
|
|
||
|
err = snd_pcm_hw_params(substream, params);
|
||
|
if (err < 0)
|
||
|
goto end;
|
||
|
|
||
|
if (copy_to_user(_params, params, sizeof(*params)))
|
||
|
err = -EFAULT;
|
||
|
end:
|
||
|
kfree(params);
|
||
|
return err;
|
||
|
}
|
||
|
|
||
|
static int do_hw_free(struct snd_pcm_substream *substream)
|
||
|
{
|
||
|
int result = 0;
|
||
|
|
||
|
snd_pcm_sync_stop(substream, true);
|
||
|
if (substream->ops->hw_free)
|
||
|
result = substream->ops->hw_free(substream);
|
||
|
if (substream->managed_buffer_alloc)
|
||
|
snd_pcm_lib_free_pages(substream);
|
||
|
return result;
|
||
|
}
|
||
|
|
||
|
static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
|
||
|
{
|
||
|
struct snd_pcm_runtime *runtime;
|
||
|
int result = 0;
|
||
|
|
||
|
if (PCM_RUNTIME_CHECK(substream))
|
||
|
return -ENXIO;
|
||
|
runtime = substream->runtime;
|
||
|
result = snd_pcm_buffer_access_lock(runtime);
|
||
|
if (result < 0)
|
||
|
return result;
|
||
|
snd_pcm_stream_lock_irq(substream);
|
||
|
switch (runtime->state) {
|
||
|
case SNDRV_PCM_STATE_SETUP:
|
||
|
case SNDRV_PCM_STATE_PREPARED:
|
||
|
if (atomic_read(&substream->mmap_count))
|
||
|
result = -EBADFD;
|
||
|
break;
|
||
|
default:
|
||
|
result = -EBADFD;
|
||
|
break;
|
||
|
}
|
||
|
snd_pcm_stream_unlock_irq(substream);
|
||
|
if (result)
|
||
|
goto unlock;
|
||
|
result = do_hw_free(substream);
|
||
|
snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
|
||
|
cpu_latency_qos_remove_request(&substream->latency_pm_qos_req);
|
||
|
unlock:
|
||
|
snd_pcm_buffer_access_unlock(runtime);
|
||
|
return result;
|
||
|
}
|
||
|
|
||
|
static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
|
||
|
struct snd_pcm_sw_params *params)
|
||
|
{
|
||
|
struct snd_pcm_runtime *runtime;
|
||
|
int err;
|
||
|
|
||
|
if (PCM_RUNTIME_CHECK(substream))
|
||
|
return -ENXIO;
|
||
|
runtime = substream->runtime;
|
||
|
snd_pcm_stream_lock_irq(substream);
|
||
|
if (runtime->state == SNDRV_PCM_STATE_OPEN) {
|
||
|
snd_pcm_stream_unlock_irq(substream);
|
||
|
return -EBADFD;
|
||
|
}
|
||
|
snd_pcm_stream_unlock_irq(substream);
|
||
|
|
||
|
if (params->tstamp_mode < 0 ||
|
||
|
params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
|
||
|
return -EINVAL;
|
||
|
if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12) &&
|
||
|
params->tstamp_type > SNDRV_PCM_TSTAMP_TYPE_LAST)
|
||
|
return -EINVAL;
|
||
|
if (params->avail_min == 0)
|
||
|
return -EINVAL;
|
||
|
if (params->silence_size >= runtime->boundary) {
|
||
|
if (params->silence_threshold != 0)
|
||
|
return -EINVAL;
|
||
|
} else {
|
||
|
if (params->silence_size > params->silence_threshold)
|
||
|
return -EINVAL;
|
||
|
if (params->silence_threshold > runtime->buffer_size)
|
||
|
return -EINVAL;
|
||
|
}
|
||
|
err = 0;
|
||
|
snd_pcm_stream_lock_irq(substream);
|
||
|
runtime->tstamp_mode = params->tstamp_mode;
|
||
|
if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12))
|
||
|
runtime->tstamp_type = params->tstamp_type;
|
||
|
runtime->period_step = params->period_step;
|
||
|
runtime->control->avail_min = params->avail_min;
|
||
|
runtime->start_threshold = params->start_threshold;
|
||
|
runtime->stop_threshold = params->stop_threshold;
|
||
|
runtime->silence_threshold = params->silence_threshold;
|
||
|
runtime->silence_size = params->silence_size;
|
||
|
params->boundary = runtime->boundary;
|
||
|
if (snd_pcm_running(substream)) {
|
||
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
|
||
|
runtime->silence_size > 0)
|
||
|
snd_pcm_playback_silence(substream, ULONG_MAX);
|
||
|
err = snd_pcm_update_state(substream, runtime);
|
||
|
}
|
||
|
snd_pcm_stream_unlock_irq(substream);
|
||
|
return err;
|
||
|
}
|
||
|
|
||
|
static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
|
||
|
struct snd_pcm_sw_params __user * _params)
|
||
|
{
|
||
|
struct snd_pcm_sw_params params;
|
||
|
int err;
|
||
|
if (copy_from_user(¶ms, _params, sizeof(params)))
|
||
|
return -EFAULT;
|
||
|
err = snd_pcm_sw_params(substream, ¶ms);
|
||
|
if (copy_to_user(_params, ¶ms, sizeof(params)))
|
||
|
return -EFAULT;
|
||
|
return err;
|
||
|
}
|
||
|
|
||
|
static inline snd_pcm_uframes_t
|
||
|
snd_pcm_calc_delay(struct snd_pcm_substream *substream)
|
||
|
{
|
||
|
snd_pcm_uframes_t delay;
|
||
|
|
||
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
|
||
|
delay = snd_pcm_playback_hw_avail(substream->runtime);
|
||
|
else
|
||
|
delay = snd_pcm_capture_avail(substream->runtime);
|
||
|
return delay + substream->runtime->delay;
|
||
|
}
|
||
|
|
||
|
int snd_pcm_status64(struct snd_pcm_substream *substream,
|
||
|
struct snd_pcm_status64 *status)
|
||
|
{
|
||
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
||
|
|
||
|
snd_pcm_stream_lock_irq(substream);
|
||
|
|
||
|
snd_pcm_unpack_audio_tstamp_config(status->audio_tstamp_data,
|
||
|
&runtime->audio_tstamp_config);
|
||
|
|
||
|
/* backwards compatible behavior */
|
||
|
if (runtime->audio_tstamp_config.type_requested ==
|
||
|
SNDRV_PCM_AUDIO_TSTAMP_TYPE_COMPAT) {
|
||
|
if (runtime->hw.info & SNDRV_PCM_INFO_HAS_WALL_CLOCK)
|
||
|
runtime->audio_tstamp_config.type_requested =
|
||
|
SNDRV_PCM_AUDIO_TSTAMP_TYPE_LINK;
|
||
|
else
|
||
|
runtime->audio_tstamp_config.type_requested =
|
||
|
SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT;
|
||
|
runtime->audio_tstamp_report.valid = 0;
|
||
|
} else
|
||
|
runtime->audio_tstamp_report.valid = 1;
|
||
|
|
||
|
status->state = runtime->state;
|
||
|
status->suspended_state = runtime->suspended_state;
|
||
|
if (status->state == SNDRV_PCM_STATE_OPEN)
|
||
|
goto _end;
|
||
|
status->trigger_tstamp_sec = runtime->trigger_tstamp.tv_sec;
|
||
|
status->trigger_tstamp_nsec = runtime->trigger_tstamp.tv_nsec;
|
||
|
if (snd_pcm_running(substream)) {
|
||
|
snd_pcm_update_hw_ptr(substream);
|
||
|
if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
|
||
|
status->tstamp_sec = runtime->status->tstamp.tv_sec;
|
||
|
status->tstamp_nsec =
|
||
|
runtime->status->tstamp.tv_nsec;
|
||
|
status->driver_tstamp_sec =
|
||
|
runtime->driver_tstamp.tv_sec;
|
||
|
status->driver_tstamp_nsec =
|
||
|
runtime->driver_tstamp.tv_nsec;
|
||
|
status->audio_tstamp_sec =
|
||
|
runtime->status->audio_tstamp.tv_sec;
|
||
|
status->audio_tstamp_nsec =
|
||
|
runtime->status->audio_tstamp.tv_nsec;
|
||
|
if (runtime->audio_tstamp_report.valid == 1)
|
||
|
/* backwards compatibility, no report provided in COMPAT mode */
|
||
|
snd_pcm_pack_audio_tstamp_report(&status->audio_tstamp_data,
|
||
|
&status->audio_tstamp_accuracy,
|
||
|
&runtime->audio_tstamp_report);
|
||
|
|
||
|
goto _tstamp_end;
|
||
|
}
|
||
|
} else {
|
||
|
/* get tstamp only in fallback mode and only if enabled */
|
||
|
if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
|
||
|
struct timespec64 tstamp;
|
||
|
|
||
|
snd_pcm_gettime(runtime, &tstamp);
|
||
|
status->tstamp_sec = tstamp.tv_sec;
|
||
|
status->tstamp_nsec = tstamp.tv_nsec;
|
||
|
}
|
||
|
}
|
||
|
_tstamp_end:
|
||
|
status->appl_ptr = runtime->control->appl_ptr;
|
||
|
status->hw_ptr = runtime->status->hw_ptr;
|
||
|
status->avail = snd_pcm_avail(substream);
|
||
|
status->delay = snd_pcm_running(substream) ?
|
||
|
snd_pcm_calc_delay(substream) : 0;
|
||
|
status->avail_max = runtime->avail_max;
|
||
|
status->overrange = runtime->overrange;
|
||
|
runtime->avail_max = 0;
|
||
|
runtime->overrange = 0;
|
||
|
_end:
|
||
|
snd_pcm_stream_unlock_irq(substream);
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int snd_pcm_status_user64(struct snd_pcm_substream *substream,
|
||
|
struct snd_pcm_status64 __user * _status,
|
||
|
bool ext)
|
||
|
{
|
||
|
struct snd_pcm_status64 status;
|
||
|
int res;
|
||
|
|
||
|
memset(&status, 0, sizeof(status));
|
||
|
/*
|
||
|
* with extension, parameters are read/write,
|
||
|
* get audio_tstamp_data from user,
|
||
|
* ignore rest of status structure
|
||
|
*/
|
||
|
if (ext && get_user(status.audio_tstamp_data,
|
||
|
(u32 __user *)(&_status->audio_tstamp_data)))
|
||
|
return -EFAULT;
|
||
|
res = snd_pcm_status64(substream, &status);
|
||
|
if (res < 0)
|
||
|
return res;
|
||
|
if (copy_to_user(_status, &status, sizeof(status)))
|
||
|
return -EFAULT;
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int snd_pcm_status_user32(struct snd_pcm_substream *substream,
|
||
|
struct snd_pcm_status32 __user * _status,
|
||
|
bool ext)
|
||
|
{
|
||
|
struct snd_pcm_status64 status64;
|
||
|
struct snd_pcm_status32 status32;
|
||
|
int res;
|
||
|
|
||
|
memset(&status64, 0, sizeof(status64));
|
||
|
memset(&status32, 0, sizeof(status32));
|
||
|
/*
|
||
|
* with extension, parameters are read/write,
|
||
|
* get audio_tstamp_data from user,
|
||
|
* ignore rest of status structure
|
||
|
*/
|
||
|
if (ext && get_user(status64.audio_tstamp_data,
|
||
|
(u32 __user *)(&_status->audio_tstamp_data)))
|
||
|
return -EFAULT;
|
||
|
res = snd_pcm_status64(substream, &status64);
|
||
|
if (res < 0)
|
||
|
return res;
|
||
|
|
||
|
status32 = (struct snd_pcm_status32) {
|
||
|
.state = status64.state,
|
||
|
.trigger_tstamp_sec = status64.trigger_tstamp_sec,
|
||
|
.trigger_tstamp_nsec = status64.trigger_tstamp_nsec,
|
||
|
.tstamp_sec = status64.tstamp_sec,
|
||
|
.tstamp_nsec = status64.tstamp_nsec,
|
||
|
.appl_ptr = status64.appl_ptr,
|
||
|
.hw_ptr = status64.hw_ptr,
|
||
|
.delay = status64.delay,
|
||
|
.avail = status64.avail,
|
||
|
.avail_max = status64.avail_max,
|
||
|
.overrange = status64.overrange,
|
||
|
.suspended_state = status64.suspended_state,
|
||
|
.audio_tstamp_data = status64.audio_tstamp_data,
|
||
|
.audio_tstamp_sec = status64.audio_tstamp_sec,
|
||
|
.audio_tstamp_nsec = status64.audio_tstamp_nsec,
|
||
|
.driver_tstamp_sec = status64.audio_tstamp_sec,
|
||
|
.driver_tstamp_nsec = status64.audio_tstamp_nsec,
|
||
|
.audio_tstamp_accuracy = status64.audio_tstamp_accuracy,
|
||
|
};
|
||
|
|
||
|
if (copy_to_user(_status, &status32, sizeof(status32)))
|
||
|
return -EFAULT;
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
|
||
|
struct snd_pcm_channel_info * info)
|
||
|
{
|
||
|
struct snd_pcm_runtime *runtime;
|
||
|
unsigned int channel;
|
||
|
|
||
|
channel = info->channel;
|
||
|
runtime = substream->runtime;
|
||
|
snd_pcm_stream_lock_irq(substream);
|
||
|
if (runtime->state == SNDRV_PCM_STATE_OPEN) {
|
||
|
snd_pcm_stream_unlock_irq(substream);
|
||
|
return -EBADFD;
|
||
|
}
|
||
|
snd_pcm_stream_unlock_irq(substream);
|
||
|
if (channel >= runtime->channels)
|
||
|
return -EINVAL;
|
||
|
memset(info, 0, sizeof(*info));
|
||
|
info->channel = channel;
|
||
|
return snd_pcm_ops_ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
|
||
|
}
|
||
|
|
||
|
static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
|
||
|
struct snd_pcm_channel_info __user * _info)
|
||
|
{
|
||
|
struct snd_pcm_channel_info info;
|
||
|
int res;
|
||
|
|
||
|
if (copy_from_user(&info, _info, sizeof(info)))
|
||
|
return -EFAULT;
|
||
|
res = snd_pcm_channel_info(substream, &info);
|
||
|
if (res < 0)
|
||
|
return res;
|
||
|
if (copy_to_user(_info, &info, sizeof(info)))
|
||
|
return -EFAULT;
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
|
||
|
{
|
||
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
||
|
if (runtime->trigger_master == NULL)
|
||
|
return;
|
||
|
if (runtime->trigger_master == substream) {
|
||
|
if (!runtime->trigger_tstamp_latched)
|
||
|
snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
|
||
|
} else {
|
||
|
snd_pcm_trigger_tstamp(runtime->trigger_master);
|
||
|
runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
|
||
|
}
|
||
|
runtime->trigger_master = NULL;
|
||
|
}
|
||
|
|
||
|
#define ACTION_ARG_IGNORE (__force snd_pcm_state_t)0
|
||
|
|
||
|
struct action_ops {
|
||
|
int (*pre_action)(struct snd_pcm_substream *substream,
|
||
|
snd_pcm_state_t state);
|
||
|
int (*do_action)(struct snd_pcm_substream *substream,
|
||
|
snd_pcm_state_t state);
|
||
|
void (*undo_action)(struct snd_pcm_substream *substream,
|
||
|
snd_pcm_state_t state);
|
||
|
void (*post_action)(struct snd_pcm_substream *substream,
|
||
|
snd_pcm_state_t state);
|
||
|
};
|
||
|
|
||
|
/*
|
||
|
* this functions is core for handling of linked stream
|
||
|
* Note: the stream state might be changed also on failure
|
||
|
* Note2: call with calling stream lock + link lock
|
||
|
*/
|
||
|
static int snd_pcm_action_group(const struct action_ops *ops,
|
||
|
struct snd_pcm_substream *substream,
|
||
|
snd_pcm_state_t state,
|
||
|
bool stream_lock)
|
||
|
{
|
||
|
struct snd_pcm_substream *s = NULL;
|
||
|
struct snd_pcm_substream *s1;
|
||
|
int res = 0, depth = 1;
|
||
|
|
||
|
snd_pcm_group_for_each_entry(s, substream) {
|
||
|
if (s != substream) {
|
||
|
if (!stream_lock)
|
||
|
mutex_lock_nested(&s->runtime->buffer_mutex, depth);
|
||
|
else if (s->pcm->nonatomic)
|
||
|
mutex_lock_nested(&s->self_group.mutex, depth);
|
||
|
else
|
||
|
spin_lock_nested(&s->self_group.lock, depth);
|
||
|
depth++;
|
||
|
}
|
||
|
res = ops->pre_action(s, state);
|
||
|
if (res < 0)
|
||
|
goto _unlock;
|
||
|
}
|
||
|
snd_pcm_group_for_each_entry(s, substream) {
|
||
|
res = ops->do_action(s, state);
|
||
|
if (res < 0) {
|
||
|
if (ops->undo_action) {
|
||
|
snd_pcm_group_for_each_entry(s1, substream) {
|
||
|
if (s1 == s) /* failed stream */
|
||
|
break;
|
||
|
ops->undo_action(s1, state);
|
||
|
}
|
||
|
}
|
||
|
s = NULL; /* unlock all */
|
||
|
goto _unlock;
|
||
|
}
|
||
|
}
|
||
|
snd_pcm_group_for_each_entry(s, substream) {
|
||
|
ops->post_action(s, state);
|
||
|
}
|
||
|
_unlock:
|
||
|
/* unlock streams */
|
||
|
snd_pcm_group_for_each_entry(s1, substream) {
|
||
|
if (s1 != substream) {
|
||
|
if (!stream_lock)
|
||
|
mutex_unlock(&s1->runtime->buffer_mutex);
|
||
|
else if (s1->pcm->nonatomic)
|
||
|
mutex_unlock(&s1->self_group.mutex);
|
||
|
else
|
||
|
spin_unlock(&s1->self_group.lock);
|
||
|
}
|
||
|
if (s1 == s) /* end */
|
||
|
break;
|
||
|
}
|
||
|
return res;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Note: call with stream lock
|
||
|
*/
|
||
|
static int snd_pcm_action_single(const struct action_ops *ops,
|
||
|
struct snd_pcm_substream *substream,
|
||
|
snd_pcm_state_t state)
|
||
|
{
|
||
|
int res;
|
||
|
|
||
|
res = ops->pre_action(substream, state);
|
||
|
if (res < 0)
|
||
|
return res;
|
||
|
res = ops->do_action(substream, state);
|
||
|
if (res == 0)
|
||
|
ops->post_action(substream, state);
|
||
|
else if (ops->undo_action)
|
||
|
ops->undo_action(substream, state);
|
||
|
return res;
|
||
|
}
|
||
|
|
||
|
static void snd_pcm_group_assign(struct snd_pcm_substream *substream,
|
||
|
struct snd_pcm_group *new_group)
|
||
|
{
|
||
|
substream->group = new_group;
|
||
|
list_move(&substream->link_list, &new_group->substreams);
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Unref and unlock the group, but keep the stream lock;
|
||
|
* when the group becomes empty and no longer referred, destroy itself
|
||
|
*/
|
||
|
static void snd_pcm_group_unref(struct snd_pcm_group *group,
|
||
|
struct snd_pcm_substream *substream)
|
||
|
{
|
||
|
bool do_free;
|
||
|
|
||
|
if (!group)
|
||
|
return;
|
||
|
do_free = refcount_dec_and_test(&group->refs);
|
||
|
snd_pcm_group_unlock(group, substream->pcm->nonatomic);
|
||
|
if (do_free)
|
||
|
kfree(group);
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Lock the group inside a stream lock and reference it;
|
||
|
* return the locked group object, or NULL if not linked
|
||
|
*/
|
||
|
static struct snd_pcm_group *
|
||
|
snd_pcm_stream_group_ref(struct snd_pcm_substream *substream)
|
||
|
{
|
||
|
bool nonatomic = substream->pcm->nonatomic;
|
||
|
struct snd_pcm_group *group;
|
||
|
bool trylock;
|
||
|
|
||
|
for (;;) {
|
||
|
if (!snd_pcm_stream_linked(substream))
|
||
|
return NULL;
|
||
|
group = substream->group;
|
||
|
/* block freeing the group object */
|
||
|
refcount_inc(&group->refs);
|
||
|
|
||
|
trylock = nonatomic ? mutex_trylock(&group->mutex) :
|
||
|
spin_trylock(&group->lock);
|
||
|
if (trylock)
|
||
|
break; /* OK */
|
||
|
|
||
|
/* re-lock for avoiding ABBA deadlock */
|
||
|
snd_pcm_stream_unlock(substream);
|
||
|
snd_pcm_group_lock(group, nonatomic);
|
||
|
snd_pcm_stream_lock(substream);
|
||
|
|
||
|
/* check the group again; the above opens a small race window */
|
||
|
if (substream->group == group)
|
||
|
break; /* OK */
|
||
|
/* group changed, try again */
|
||
|
snd_pcm_group_unref(group, substream);
|
||
|
}
|
||
|
return group;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Note: call with stream lock
|
||
|
*/
|
||
|
static int snd_pcm_action(const struct action_ops *ops,
|
||
|
struct snd_pcm_substream *substream,
|
||
|
snd_pcm_state_t state)
|
||
|
{
|
||
|
struct snd_pcm_group *group;
|
||
|
int res;
|
||
|
|
||
|
group = snd_pcm_stream_group_ref(substream);
|
||
|
if (group)
|
||
|
res = snd_pcm_action_group(ops, substream, state, true);
|
||
|
else
|
||
|
res = snd_pcm_action_single(ops, substream, state);
|
||
|
snd_pcm_group_unref(group, substream);
|
||
|
return res;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Note: don't use any locks before
|
||
|
*/
|
||
|
static int snd_pcm_action_lock_irq(const struct action_ops *ops,
|
||
|
struct snd_pcm_substream *substream,
|
||
|
snd_pcm_state_t state)
|
||
|
{
|
||
|
int res;
|
||
|
|
||
|
snd_pcm_stream_lock_irq(substream);
|
||
|
res = snd_pcm_action(ops, substream, state);
|
||
|
snd_pcm_stream_unlock_irq(substream);
|
||
|
return res;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
*/
|
||
|
static int snd_pcm_action_nonatomic(const struct action_ops *ops,
|
||
|
struct snd_pcm_substream *substream,
|
||
|
snd_pcm_state_t state)
|
||
|
{
|
||
|
int res;
|
||
|
|
||
|
/* Guarantee the group members won't change during non-atomic action */
|
||
|
down_read(&snd_pcm_link_rwsem);
|
||
|
res = snd_pcm_buffer_access_lock(substream->runtime);
|
||
|
if (res < 0)
|
||
|
goto unlock;
|
||
|
if (snd_pcm_stream_linked(substream))
|
||
|
res = snd_pcm_action_group(ops, substream, state, false);
|
||
|
else
|
||
|
res = snd_pcm_action_single(ops, substream, state);
|
||
|
snd_pcm_buffer_access_unlock(substream->runtime);
|
||
|
unlock:
|
||
|
up_read(&snd_pcm_link_rwsem);
|
||
|
return res;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* start callbacks
|
||
|
*/
|
||
|
static int snd_pcm_pre_start(struct snd_pcm_substream *substream,
|
||
|
snd_pcm_state_t state)
|
||
|
{
|
||
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
||
|
if (runtime->state != SNDRV_PCM_STATE_PREPARED)
|
||
|
return -EBADFD;
|
||
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
|
||
|
!snd_pcm_playback_data(substream))
|
||
|
return -EPIPE;
|
||
|
runtime->trigger_tstamp_latched = false;
|
||
|
runtime->trigger_master = substream;
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int snd_pcm_do_start(struct snd_pcm_substream *substream,
|
||
|
snd_pcm_state_t state)
|
||
|
{
|
||
|
if (substream->runtime->trigger_master != substream)
|
||
|
return 0;
|
||
|
return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
|
||
|
}
|
||
|
|
||
|
static void snd_pcm_undo_start(struct snd_pcm_substream *substream,
|
||
|
snd_pcm_state_t state)
|
||
|
{
|
||
|
if (substream->runtime->trigger_master == substream) {
|
||
|
substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
|
||
|
substream->runtime->stop_operating = true;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
static void snd_pcm_post_start(struct snd_pcm_substream *substream,
|
||
|
snd_pcm_state_t state)
|
||
|
{
|
||
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
||
|
snd_pcm_trigger_tstamp(substream);
|
||
|
runtime->hw_ptr_jiffies = jiffies;
|
||
|
runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) /
|
||
|
runtime->rate;
|
||
|
__snd_pcm_set_state(runtime, state);
|
||
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
|
||
|
runtime->silence_size > 0)
|
||
|
snd_pcm_playback_silence(substream, ULONG_MAX);
|
||
|
snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTART);
|
||
|
}
|
||
|
|
||
|
static const struct action_ops snd_pcm_action_start = {
|
||
|
.pre_action = snd_pcm_pre_start,
|
||
|
.do_action = snd_pcm_do_start,
|
||
|
.undo_action = snd_pcm_undo_start,
|
||
|
.post_action = snd_pcm_post_start
|
||
|
};
|
||
|
|
||
|
/**
|
||
|
* snd_pcm_start - start all linked streams
|
||
|
* @substream: the PCM substream instance
|
||
|
*
|
||
|
* Return: Zero if successful, or a negative error code.
|
||
|
* The stream lock must be acquired before calling this function.
|
||
|
*/
|
||
|
int snd_pcm_start(struct snd_pcm_substream *substream)
|
||
|
{
|
||
|
return snd_pcm_action(&snd_pcm_action_start, substream,
|
||
|
SNDRV_PCM_STATE_RUNNING);
|
||
|
}
|
||
|
|
||
|
/* take the stream lock and start the streams */
|
||
|
static int snd_pcm_start_lock_irq(struct snd_pcm_substream *substream)
|
||
|
{
|
||
|
return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream,
|
||
|
SNDRV_PCM_STATE_RUNNING);
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* stop callbacks
|
||
|
*/
|
||
|
static int snd_pcm_pre_stop(struct snd_pcm_substream *substream,
|
||
|
snd_pcm_state_t state)
|
||
|
{
|
||
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
||
|
if (runtime->state == SNDRV_PCM_STATE_OPEN)
|
||
|
return -EBADFD;
|
||
|
runtime->trigger_master = substream;
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int snd_pcm_do_stop(struct snd_pcm_substream *substream,
|
||
|
snd_pcm_state_t state)
|
||
|
{
|
||
|
if (substream->runtime->trigger_master == substream &&
|
||
|
snd_pcm_running(substream)) {
|
||
|
substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
|
||
|
substream->runtime->stop_operating = true;
|
||
|
}
|
||
|
return 0; /* unconditionally stop all substreams */
|
||
|
}
|
||
|
|
||
|
static void snd_pcm_post_stop(struct snd_pcm_substream *substream,
|
||
|
snd_pcm_state_t state)
|
||
|
{
|
||
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
||
|
if (runtime->state != state) {
|
||
|
snd_pcm_trigger_tstamp(substream);
|
||
|
__snd_pcm_set_state(runtime, state);
|
||
|
snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTOP);
|
||
|
}
|
||
|
wake_up(&runtime->sleep);
|
||
|
wake_up(&runtime->tsleep);
|
||
|
}
|
||
|
|
||
|
static const struct action_ops snd_pcm_action_stop = {
|
||
|
.pre_action = snd_pcm_pre_stop,
|
||
|
.do_action = snd_pcm_do_stop,
|
||
|
.post_action = snd_pcm_post_stop
|
||
|
};
|
||
|
|
||
|
/**
|
||
|
* snd_pcm_stop - try to stop all running streams in the substream group
|
||
|
* @substream: the PCM substream instance
|
||
|
* @state: PCM state after stopping the stream
|
||
|
*
|
||
|
* The state of each stream is then changed to the given state unconditionally.
|
||
|
*
|
||
|
* Return: Zero if successful, or a negative error code.
|
||
|
*/
|
||
|
int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state)
|
||
|
{
|
||
|
return snd_pcm_action(&snd_pcm_action_stop, substream, state);
|
||
|
}
|
||
|
EXPORT_SYMBOL(snd_pcm_stop);
|
||
|
|
||
|
/**
|
||
|
* snd_pcm_drain_done - stop the DMA only when the given stream is playback
|
||
|
* @substream: the PCM substream
|
||
|
*
|
||
|
* After stopping, the state is changed to SETUP.
|
||
|
* Unlike snd_pcm_stop(), this affects only the given stream.
|
||
|
*
|
||
|
* Return: Zero if successful, or a negative error code.
|
||
|
*/
|
||
|
int snd_pcm_drain_done(struct snd_pcm_substream *substream)
|
||
|
{
|
||
|
return snd_pcm_action_single(&snd_pcm_action_stop, substream,
|
||
|
SNDRV_PCM_STATE_SETUP);
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* snd_pcm_stop_xrun - stop the running streams as XRUN
|
||
|
* @substream: the PCM substream instance
|
||
|
*
|
||
|
* This stops the given running substream (and all linked substreams) as XRUN.
|
||
|
* Unlike snd_pcm_stop(), this function takes the substream lock by itself.
|
||
|
*
|
||
|
* Return: Zero if successful, or a negative error code.
|
||
|
*/
|
||
|
int snd_pcm_stop_xrun(struct snd_pcm_substream *substream)
|
||
|
{
|
||
|
unsigned long flags;
|
||
|
|
||
|
snd_pcm_stream_lock_irqsave(substream, flags);
|
||
|
if (substream->runtime && snd_pcm_running(substream))
|
||
|
__snd_pcm_xrun(substream);
|
||
|
snd_pcm_stream_unlock_irqrestore(substream, flags);
|
||
|
return 0;
|
||
|
}
|
||
|
EXPORT_SYMBOL_GPL(snd_pcm_stop_xrun);
|
||
|
|
||
|
/*
|
||
|
* pause callbacks: pass boolean (to start pause or resume) as state argument
|
||
|
*/
|
||
|
#define pause_pushed(state) (__force bool)(state)
|
||
|
|
||
|
static int snd_pcm_pre_pause(struct snd_pcm_substream *substream,
|
||
|
snd_pcm_state_t state)
|
||
|
{
|
||
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
||
|
if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
|
||
|
return -ENOSYS;
|
||
|
if (pause_pushed(state)) {
|
||
|
if (runtime->state != SNDRV_PCM_STATE_RUNNING)
|
||
|
return -EBADFD;
|
||
|
} else if (runtime->state != SNDRV_PCM_STATE_PAUSED)
|
||
|
return -EBADFD;
|
||
|
runtime->trigger_master = substream;
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int snd_pcm_do_pause(struct snd_pcm_substream *substream,
|
||
|
snd_pcm_state_t state)
|
||
|
{
|
||
|
if (substream->runtime->trigger_master != substream)
|
||
|
return 0;
|
||
|
/* some drivers might use hw_ptr to recover from the pause -
|
||
|
update the hw_ptr now */
|
||
|
if (pause_pushed(state))
|
||
|
snd_pcm_update_hw_ptr(substream);
|
||
|
/* The jiffies check in snd_pcm_update_hw_ptr*() is done by
|
||
|
* a delta between the current jiffies, this gives a large enough
|
||
|
* delta, effectively to skip the check once.
|
||
|
*/
|
||
|
substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
|
||
|
return substream->ops->trigger(substream,
|
||
|
pause_pushed(state) ?
|
||
|
SNDRV_PCM_TRIGGER_PAUSE_PUSH :
|
||
|
SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
|
||
|
}
|
||
|
|
||
|
static void snd_pcm_undo_pause(struct snd_pcm_substream *substream,
|
||
|
snd_pcm_state_t state)
|
||
|
{
|
||
|
if (substream->runtime->trigger_master == substream)
|
||
|
substream->ops->trigger(substream,
|
||
|
pause_pushed(state) ?
|
||
|
SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
|
||
|
SNDRV_PCM_TRIGGER_PAUSE_PUSH);
|
||
|
}
|
||
|
|
||
|
static void snd_pcm_post_pause(struct snd_pcm_substream *substream,
|
||
|
snd_pcm_state_t state)
|
||
|
{
|
||
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
||
|
snd_pcm_trigger_tstamp(substream);
|
||
|
if (pause_pushed(state)) {
|
||
|
__snd_pcm_set_state(runtime, SNDRV_PCM_STATE_PAUSED);
|
||
|
snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MPAUSE);
|
||
|
wake_up(&runtime->sleep);
|
||
|
wake_up(&runtime->tsleep);
|
||
|
} else {
|
||
|
__snd_pcm_set_state(runtime, SNDRV_PCM_STATE_RUNNING);
|
||
|
snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MCONTINUE);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
static const struct action_ops snd_pcm_action_pause = {
|
||
|
.pre_action = snd_pcm_pre_pause,
|
||
|
.do_action = snd_pcm_do_pause,
|
||
|
.undo_action = snd_pcm_undo_pause,
|
||
|
.post_action = snd_pcm_post_pause
|
||
|
};
|
||
|
|
||
|
/*
|
||
|
* Push/release the pause for all linked streams.
|
||
|
*/
|
||
|
static int snd_pcm_pause(struct snd_pcm_substream *substream, bool push)
|
||
|
{
|
||
|
return snd_pcm_action(&snd_pcm_action_pause, substream,
|
||
|
(__force snd_pcm_state_t)push);
|
||
|
}
|
||
|
|
||
|
static int snd_pcm_pause_lock_irq(struct snd_pcm_substream *substream,
|
||
|
bool push)
|
||
|
{
|
||
|
return snd_pcm_action_lock_irq(&snd_pcm_action_pause, substream,
|
||
|
(__force snd_pcm_state_t)push);
|
||
|
}
|
||
|
|
||
|
#ifdef CONFIG_PM
|
||
|
/* suspend callback: state argument ignored */
|
||
|
|
||
|
static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream,
|
||
|
snd_pcm_state_t state)
|
||
|
{
|
||
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
||
|
switch (runtime->state) {
|
||
|
case SNDRV_PCM_STATE_SUSPENDED:
|
||
|
return -EBUSY;
|
||
|
/* unresumable PCM state; return -EBUSY for skipping suspend */
|
||
|
case SNDRV_PCM_STATE_OPEN:
|
||
|
case SNDRV_PCM_STATE_SETUP:
|
||
|
case SNDRV_PCM_STATE_DISCONNECTED:
|
||
|
return -EBUSY;
|
||
|
}
|
||
|
runtime->trigger_master = substream;
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int snd_pcm_do_suspend(struct snd_pcm_substream *substream,
|
||
|
snd_pcm_state_t state)
|
||
|
{
|
||
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
||
|
if (runtime->trigger_master != substream)
|
||
|
return 0;
|
||
|
if (! snd_pcm_running(substream))
|
||
|
return 0;
|
||
|
substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
|
||
|
runtime->stop_operating = true;
|
||
|
return 0; /* suspend unconditionally */
|
||
|
}
|
||
|
|
||
|
static void snd_pcm_post_suspend(struct snd_pcm_substream *substream,
|
||
|
snd_pcm_state_t state)
|
||
|
{
|
||
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
||
|
snd_pcm_trigger_tstamp(substream);
|
||
|
runtime->suspended_state = runtime->state;
|
||
|
runtime->status->suspended_state = runtime->suspended_state;
|
||
|
__snd_pcm_set_state(runtime, SNDRV_PCM_STATE_SUSPENDED);
|
||
|
snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSUSPEND);
|
||
|
wake_up(&runtime->sleep);
|
||
|
wake_up(&runtime->tsleep);
|
||
|
}
|
||
|
|
||
|
static const struct action_ops snd_pcm_action_suspend = {
|
||
|
.pre_action = snd_pcm_pre_suspend,
|
||
|
.do_action = snd_pcm_do_suspend,
|
||
|
.post_action = snd_pcm_post_suspend
|
||
|
};
|
||
|
|
||
|
/*
|
||
|
* snd_pcm_suspend - trigger SUSPEND to all linked streams
|
||
|
* @substream: the PCM substream
|
||
|
*
|
||
|
* After this call, all streams are changed to SUSPENDED state.
|
||
|
*
|
||
|
* Return: Zero if successful, or a negative error code.
|
||
|
*/
|
||
|
static int snd_pcm_suspend(struct snd_pcm_substream *substream)
|
||
|
{
|
||
|
int err;
|
||
|
unsigned long flags;
|
||
|
|
||
|
snd_pcm_stream_lock_irqsave(substream, flags);
|
||
|
err = snd_pcm_action(&snd_pcm_action_suspend, substream,
|
||
|
ACTION_ARG_IGNORE);
|
||
|
snd_pcm_stream_unlock_irqrestore(substream, flags);
|
||
|
return err;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
|
||
|
* @pcm: the PCM instance
|
||
|
*
|
||
|
* After this call, all streams are changed to SUSPENDED state.
|
||
|
*
|
||
|
* Return: Zero if successful (or @pcm is %NULL), or a negative error code.
|
||
|
*/
|
||
|
int snd_pcm_suspend_all(struct snd_pcm *pcm)
|
||
|
{
|
||
|
struct snd_pcm_substream *substream;
|
||
|
int stream, err = 0;
|
||
|
|
||
|
if (! pcm)
|
||
|
return 0;
|
||
|
|
||
|
for_each_pcm_substream(pcm, stream, substream) {
|
||
|
/* FIXME: the open/close code should lock this as well */
|
||
|
if (!substream->runtime)
|
||
|
continue;
|
||
|
|
||
|
/*
|
||
|
* Skip BE dai link PCM's that are internal and may
|
||
|
* not have their substream ops set.
|
||
|
*/
|
||
|
if (!substream->ops)
|
||
|
continue;
|
||
|
|
||
|
err = snd_pcm_suspend(substream);
|
||
|
if (err < 0 && err != -EBUSY)
|
||
|
return err;
|
||
|
}
|
||
|
|
||
|
for_each_pcm_substream(pcm, stream, substream)
|
||
|
snd_pcm_sync_stop(substream, false);
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
EXPORT_SYMBOL(snd_pcm_suspend_all);
|
||
|
|
||
|
/* resume callbacks: state argument ignored */
|
||
|
|
||
|
static int snd_pcm_pre_resume(struct snd_pcm_substream *substream,
|
||
|
snd_pcm_state_t state)
|
||
|
{
|
||
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
||
|
if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
|
||
|
return -ENOSYS;
|
||
|
runtime->trigger_master = substream;
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int snd_pcm_do_resume(struct snd_pcm_substream *substream,
|
||
|
snd_pcm_state_t state)
|
||
|
{
|
||
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
||
|
if (runtime->trigger_master != substream)
|
||
|
return 0;
|
||
|
/* DMA not running previously? */
|
||
|
if (runtime->suspended_state != SNDRV_PCM_STATE_RUNNING &&
|
||
|
(runtime->suspended_state != SNDRV_PCM_STATE_DRAINING ||
|
||
|
substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
|
||
|
return 0;
|
||
|
return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
|
||
|
}
|
||
|
|
||
|
static void snd_pcm_undo_resume(struct snd_pcm_substream *substream,
|
||
|
snd_pcm_state_t state)
|
||
|
{
|
||
|
if (substream->runtime->trigger_master == substream &&
|
||
|
snd_pcm_running(substream))
|
||
|
substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
|
||
|
}
|
||
|
|
||
|
static void snd_pcm_post_resume(struct snd_pcm_substream *substream,
|
||
|
snd_pcm_state_t state)
|
||
|
{
|
||
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
||
|
snd_pcm_trigger_tstamp(substream);
|
||
|
__snd_pcm_set_state(runtime, runtime->suspended_state);
|
||
|
snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MRESUME);
|
||
|
}
|
||
|
|
||
|
static const struct action_ops snd_pcm_action_resume = {
|
||
|
.pre_action = snd_pcm_pre_resume,
|
||
|
.do_action = snd_pcm_do_resume,
|
||
|
.undo_action = snd_pcm_undo_resume,
|
||
|
.post_action = snd_pcm_post_resume
|
||
|
};
|
||
|
|
||
|
static int snd_pcm_resume(struct snd_pcm_substream *substream)
|
||
|
{
|
||
|
return snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream,
|
||
|
ACTION_ARG_IGNORE);
|
||
|
}
|
||
|
|
||
|
#else
|
||
|
|
||
|
static int snd_pcm_resume(struct snd_pcm_substream *substream)
|
||
|
{
|
||
|
return -ENOSYS;
|
||
|
}
|
||
|
|
||
|
#endif /* CONFIG_PM */
|
||
|
|
||
|
/*
|
||
|
* xrun ioctl
|
||
|
*
|
||
|
* Change the RUNNING stream(s) to XRUN state.
|
||
|
*/
|
||
|
static int snd_pcm_xrun(struct snd_pcm_substream *substream)
|
||
|
{
|
||
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
||
|
int result;
|
||
|
|
||
|
snd_pcm_stream_lock_irq(substream);
|
||
|
switch (runtime->state) {
|
||
|
case SNDRV_PCM_STATE_XRUN:
|
||
|
result = 0; /* already there */
|
||
|
break;
|
||
|
case SNDRV_PCM_STATE_RUNNING:
|
||
|
__snd_pcm_xrun(substream);
|
||
|
result = 0;
|
||
|
break;
|
||
|
default:
|
||
|
result = -EBADFD;
|
||
|
}
|
||
|
snd_pcm_stream_unlock_irq(substream);
|
||
|
return result;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* reset ioctl
|
||
|
*/
|
||
|
/* reset callbacks: state argument ignored */
|
||
|
static int snd_pcm_pre_reset(struct snd_pcm_substream *substream,
|
||
|
snd_pcm_state_t state)
|
||
|
{
|
||
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
||
|
switch (runtime->state) {
|
||
|
case SNDRV_PCM_STATE_RUNNING:
|
||
|
case SNDRV_PCM_STATE_PREPARED:
|
||
|
case SNDRV_PCM_STATE_PAUSED:
|
||
|
case SNDRV_PCM_STATE_SUSPENDED:
|
||
|
return 0;
|
||
|
default:
|
||
|
return -EBADFD;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
static int snd_pcm_do_reset(struct snd_pcm_substream *substream,
|
||
|
snd_pcm_state_t state)
|
||
|
{
|
||
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
||
|
int err = snd_pcm_ops_ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
|
||
|
if (err < 0)
|
||
|
return err;
|
||
|
snd_pcm_stream_lock_irq(substream);
|
||
|
runtime->hw_ptr_base = 0;
|
||
|
runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
|
||
|
runtime->status->hw_ptr % runtime->period_size;
|
||
|
runtime->silence_start = runtime->status->hw_ptr;
|
||
|
runtime->silence_filled = 0;
|
||
|
snd_pcm_stream_unlock_irq(substream);
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static void snd_pcm_post_reset(struct snd_pcm_substream *substream,
|
||
|
snd_pcm_state_t state)
|
||
|
{
|
||
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
||
|
snd_pcm_stream_lock_irq(substream);
|
||
|
runtime->control->appl_ptr = runtime->status->hw_ptr;
|
||
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
|
||
|
runtime->silence_size > 0)
|
||
|
snd_pcm_playback_silence(substream, ULONG_MAX);
|
||
|
snd_pcm_stream_unlock_irq(substream);
|
||
|
}
|
||
|
|
||
|
static const struct action_ops snd_pcm_action_reset = {
|
||
|
.pre_action = snd_pcm_pre_reset,
|
||
|
.do_action = snd_pcm_do_reset,
|
||
|
.post_action = snd_pcm_post_reset
|
||
|
};
|
||
|
|
||
|
static int snd_pcm_reset(struct snd_pcm_substream *substream)
|
||
|
{
|
||
|
return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream,
|
||
|
ACTION_ARG_IGNORE);
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* prepare ioctl
|
||
|
*/
|
||
|
/* pass f_flags as state argument */
|
||
|
static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
|
||
|
snd_pcm_state_t state)
|
||
|
{
|
||
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
||
|
int f_flags = (__force int)state;
|
||
|
|
||
|
if (runtime->state == SNDRV_PCM_STATE_OPEN ||
|
||
|
runtime->state == SNDRV_PCM_STATE_DISCONNECTED)
|
||
|
return -EBADFD;
|
||
|
if (snd_pcm_running(substream))
|
||
|
return -EBUSY;
|
||
|
substream->f_flags = f_flags;
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int snd_pcm_do_prepare(struct snd_pcm_substream *substream,
|
||
|
snd_pcm_state_t state)
|
||
|
{
|
||
|
int err;
|
||
|
snd_pcm_sync_stop(substream, true);
|
||
|
err = substream->ops->prepare(substream);
|
||
|
if (err < 0)
|
||
|
return err;
|
||
|
return snd_pcm_do_reset(substream, state);
|
||
|
}
|
||
|
|
||
|
static void snd_pcm_post_prepare(struct snd_pcm_substream *substream,
|
||
|
snd_pcm_state_t state)
|
||
|
{
|
||
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
||
|
runtime->control->appl_ptr = runtime->status->hw_ptr;
|
||
|
snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED);
|
||
|
}
|
||
|
|
||
|
static const struct action_ops snd_pcm_action_prepare = {
|
||
|
.pre_action = snd_pcm_pre_prepare,
|
||
|
.do_action = snd_pcm_do_prepare,
|
||
|
.post_action = snd_pcm_post_prepare
|
||
|
};
|
||
|
|
||
|
/**
|
||
|
* snd_pcm_prepare - prepare the PCM substream to be triggerable
|
||
|
* @substream: the PCM substream instance
|
||
|
* @file: file to refer f_flags
|
||
|
*
|
||
|
* Return: Zero if successful, or a negative error code.
|
||
|
*/
|
||
|
static int snd_pcm_prepare(struct snd_pcm_substream *substream,
|
||
|
struct file *file)
|
||
|
{
|
||
|
int f_flags;
|
||
|
|
||
|
if (file)
|
||
|
f_flags = file->f_flags;
|
||
|
else
|
||
|
f_flags = substream->f_flags;
|
||
|
|
||
|
snd_pcm_stream_lock_irq(substream);
|
||
|
switch (substream->runtime->state) {
|
||
|
case SNDRV_PCM_STATE_PAUSED:
|
||
|
snd_pcm_pause(substream, false);
|
||
|
fallthrough;
|
||
|
case SNDRV_PCM_STATE_SUSPENDED:
|
||
|
snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
|
||
|
break;
|
||
|
}
|
||
|
snd_pcm_stream_unlock_irq(substream);
|
||
|
|
||
|
return snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
|
||
|
substream,
|
||
|
(__force snd_pcm_state_t)f_flags);
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* drain ioctl
|
||
|
*/
|
||
|
|
||
|
/* drain init callbacks: state argument ignored */
|
||
|
static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream,
|
||
|
snd_pcm_state_t state)
|
||
|
{
|
||
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
||
|
switch (runtime->state) {
|
||
|
case SNDRV_PCM_STATE_OPEN:
|
||
|
case SNDRV_PCM_STATE_DISCONNECTED:
|
||
|
case SNDRV_PCM_STATE_SUSPENDED:
|
||
|
return -EBADFD;
|
||
|
}
|
||
|
runtime->trigger_master = substream;
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream,
|
||
|
snd_pcm_state_t state)
|
||
|
{
|
||
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
||
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
|
||
|
switch (runtime->state) {
|
||
|
case SNDRV_PCM_STATE_PREPARED:
|
||
|
/* start playback stream if possible */
|
||
|
if (! snd_pcm_playback_empty(substream)) {
|
||
|
snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
|
||
|
snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
|
||
|
} else {
|
||
|
__snd_pcm_set_state(runtime, SNDRV_PCM_STATE_SETUP);
|
||
|
}
|
||
|
break;
|
||
|
case SNDRV_PCM_STATE_RUNNING:
|
||
|
__snd_pcm_set_state(runtime, SNDRV_PCM_STATE_DRAINING);
|
||
|
break;
|
||
|
case SNDRV_PCM_STATE_XRUN:
|
||
|
__snd_pcm_set_state(runtime, SNDRV_PCM_STATE_SETUP);
|
||
|
break;
|
||
|
default:
|
||
|
break;
|
||
|
}
|
||
|
} else {
|
||
|
/* stop running stream */
|
||
|
if (runtime->state == SNDRV_PCM_STATE_RUNNING) {
|
||
|
snd_pcm_state_t new_state;
|
||
|
|
||
|
new_state = snd_pcm_capture_avail(runtime) > 0 ?
|
||
|
SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
|
||
|
snd_pcm_do_stop(substream, new_state);
|
||
|
snd_pcm_post_stop(substream, new_state);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if (runtime->state == SNDRV_PCM_STATE_DRAINING &&
|
||
|
runtime->trigger_master == substream &&
|
||
|
(runtime->hw.info & SNDRV_PCM_INFO_DRAIN_TRIGGER))
|
||
|
return substream->ops->trigger(substream,
|
||
|
SNDRV_PCM_TRIGGER_DRAIN);
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream,
|
||
|
snd_pcm_state_t state)
|
||
|
{
|
||
|
}
|
||
|
|
||
|
static const struct action_ops snd_pcm_action_drain_init = {
|
||
|
.pre_action = snd_pcm_pre_drain_init,
|
||
|
.do_action = snd_pcm_do_drain_init,
|
||
|
.post_action = snd_pcm_post_drain_init
|
||
|
};
|
||
|
|
||
|
/*
|
||
|
* Drain the stream(s).
|
||
|
* When the substream is linked, sync until the draining of all playback streams
|
||
|
* is finished.
|
||
|
* After this call, all streams are supposed to be either SETUP or DRAINING
|
||
|
* (capture only) state.
|
||
|
*/
|
||
|
static int snd_pcm_drain(struct snd_pcm_substream *substream,
|
||
|
struct file *file)
|
||
|
{
|
||
|
struct snd_card *card;
|
||
|
struct snd_pcm_runtime *runtime;
|
||
|
struct snd_pcm_substream *s;
|
||
|
struct snd_pcm_group *group;
|
||
|
wait_queue_entry_t wait;
|
||
|
int result = 0;
|
||
|
int nonblock = 0;
|
||
|
|
||
|
card = substream->pcm->card;
|
||
|
runtime = substream->runtime;
|
||
|
|
||
|
if (runtime->state == SNDRV_PCM_STATE_OPEN)
|
||
|
return -EBADFD;
|
||
|
|
||
|
if (file) {
|
||
|
if (file->f_flags & O_NONBLOCK)
|
||
|
nonblock = 1;
|
||
|
} else if (substream->f_flags & O_NONBLOCK)
|
||
|
nonblock = 1;
|
||
|
|
||
|
snd_pcm_stream_lock_irq(substream);
|
||
|
/* resume pause */
|
||
|
if (runtime->state == SNDRV_PCM_STATE_PAUSED)
|
||
|
snd_pcm_pause(substream, false);
|
||
|
|
||
|
/* pre-start/stop - all running streams are changed to DRAINING state */
|
||
|
result = snd_pcm_action(&snd_pcm_action_drain_init, substream,
|
||
|
ACTION_ARG_IGNORE);
|
||
|
if (result < 0)
|
||
|
goto unlock;
|
||
|
/* in non-blocking, we don't wait in ioctl but let caller poll */
|
||
|
if (nonblock) {
|
||
|
result = -EAGAIN;
|
||
|
goto unlock;
|
||
|
}
|
||
|
|
||
|
for (;;) {
|
||
|
long tout;
|
||
|
struct snd_pcm_runtime *to_check;
|
||
|
if (signal_pending(current)) {
|
||
|
result = -ERESTARTSYS;
|
||
|
break;
|
||
|
}
|
||
|
/* find a substream to drain */
|
||
|
to_check = NULL;
|
||
|
group = snd_pcm_stream_group_ref(substream);
|
||
|
snd_pcm_group_for_each_entry(s, substream) {
|
||
|
if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
|
||
|
continue;
|
||
|
runtime = s->runtime;
|
||
|
if (runtime->state == SNDRV_PCM_STATE_DRAINING) {
|
||
|
to_check = runtime;
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
snd_pcm_group_unref(group, substream);
|
||
|
if (!to_check)
|
||
|
break; /* all drained */
|
||
|
init_waitqueue_entry(&wait, current);
|
||
|
set_current_state(TASK_INTERRUPTIBLE);
|
||
|
add_wait_queue(&to_check->sleep, &wait);
|
||
|
snd_pcm_stream_unlock_irq(substream);
|
||
|
if (runtime->no_period_wakeup)
|
||
|
tout = MAX_SCHEDULE_TIMEOUT;
|
||
|
else {
|
||
|
tout = 10;
|
||
|
if (runtime->rate) {
|
||
|
long t = runtime->period_size * 2 / runtime->rate;
|
||
|
tout = max(t, tout);
|
||
|
}
|
||
|
tout = msecs_to_jiffies(tout * 1000);
|
||
|
}
|
||
|
tout = schedule_timeout(tout);
|
||
|
|
||
|
snd_pcm_stream_lock_irq(substream);
|
||
|
group = snd_pcm_stream_group_ref(substream);
|
||
|
snd_pcm_group_for_each_entry(s, substream) {
|
||
|
if (s->runtime == to_check) {
|
||
|
remove_wait_queue(&to_check->sleep, &wait);
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
snd_pcm_group_unref(group, substream);
|
||
|
|
||
|
if (card->shutdown) {
|
||
|
result = -ENODEV;
|
||
|
break;
|
||
|
}
|
||
|
if (tout == 0) {
|
||
|
if (substream->runtime->state == SNDRV_PCM_STATE_SUSPENDED)
|
||
|
result = -ESTRPIPE;
|
||
|
else {
|
||
|
dev_dbg(substream->pcm->card->dev,
|
||
|
"playback drain error (DMA or IRQ trouble?)\n");
|
||
|
snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
|
||
|
result = -EIO;
|
||
|
}
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
unlock:
|
||
|
snd_pcm_stream_unlock_irq(substream);
|
||
|
|
||
|
return result;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* drop ioctl
|
||
|
*
|
||
|
* Immediately put all linked substreams into SETUP state.
|
||
|
*/
|
||
|
static int snd_pcm_drop(struct snd_pcm_substream *substream)
|
||
|
{
|
||
|
struct snd_pcm_runtime *runtime;
|
||
|
int result = 0;
|
||
|
|
||
|
if (PCM_RUNTIME_CHECK(substream))
|
||
|
return -ENXIO;
|
||
|
runtime = substream->runtime;
|
||
|
|
||
|
if (runtime->state == SNDRV_PCM_STATE_OPEN ||
|
||
|
runtime->state == SNDRV_PCM_STATE_DISCONNECTED)
|
||
|
return -EBADFD;
|
||
|
|
||
|
snd_pcm_stream_lock_irq(substream);
|
||
|
/* resume pause */
|
||
|
if (runtime->state == SNDRV_PCM_STATE_PAUSED)
|
||
|
snd_pcm_pause(substream, false);
|
||
|
|
||
|
snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
|
||
|
/* runtime->control->appl_ptr = runtime->status->hw_ptr; */
|
||
|
snd_pcm_stream_unlock_irq(substream);
|
||
|
|
||
|
return result;
|
||
|
}
|
||
|
|
||
|
|
||
|
static bool is_pcm_file(struct file *file)
|
||
|
{
|
||
|
struct inode *inode = file_inode(file);
|
||
|
struct snd_pcm *pcm;
|
||
|
unsigned int minor;
|
||
|
|
||
|
if (!S_ISCHR(inode->i_mode) || imajor(inode) != snd_major)
|
||
|
return false;
|
||
|
minor = iminor(inode);
|
||
|
pcm = snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
|
||
|
if (!pcm)
|
||
|
pcm = snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE);
|
||
|
if (!pcm)
|
||
|
return false;
|
||
|
snd_card_unref(pcm->card);
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* PCM link handling
|
||
|
*/
|
||
|
static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
|
||
|
{
|
||
|
int res = 0;
|
||
|
struct snd_pcm_file *pcm_file;
|
||
|
struct snd_pcm_substream *substream1;
|
||
|
struct snd_pcm_group *group, *target_group;
|
||
|
bool nonatomic = substream->pcm->nonatomic;
|
||
|
struct fd f = fdget(fd);
|
||
|
|
||
|
if (!f.file)
|
||
|
return -EBADFD;
|
||
|
if (!is_pcm_file(f.file)) {
|
||
|
res = -EBADFD;
|
||
|
goto _badf;
|
||
|
}
|
||
|
pcm_file = f.file->private_data;
|
||
|
substream1 = pcm_file->substream;
|
||
|
|
||
|
if (substream == substream1) {
|
||
|
res = -EINVAL;
|
||
|
goto _badf;
|
||
|
}
|
||
|
|
||
|
group = kzalloc(sizeof(*group), GFP_KERNEL);
|
||
|
if (!group) {
|
||
|
res = -ENOMEM;
|
||
|
goto _nolock;
|
||
|
}
|
||
|
snd_pcm_group_init(group);
|
||
|
|
||
|
down_write(&snd_pcm_link_rwsem);
|
||
|
if (substream->runtime->state == SNDRV_PCM_STATE_OPEN ||
|
||
|
substream->runtime->state != substream1->runtime->state ||
|
||
|
substream->pcm->nonatomic != substream1->pcm->nonatomic) {
|
||
|
res = -EBADFD;
|
||
|
goto _end;
|
||
|
}
|
||
|
if (snd_pcm_stream_linked(substream1)) {
|
||
|
res = -EALREADY;
|
||
|
goto _end;
|
||
|
}
|
||
|
|
||
|
snd_pcm_stream_lock_irq(substream);
|
||
|
if (!snd_pcm_stream_linked(substream)) {
|
||
|
snd_pcm_group_assign(substream, group);
|
||
|
group = NULL; /* assigned, don't free this one below */
|
||
|
}
|
||
|
target_group = substream->group;
|
||
|
snd_pcm_stream_unlock_irq(substream);
|
||
|
|
||
|
snd_pcm_group_lock_irq(target_group, nonatomic);
|
||
|
snd_pcm_stream_lock_nested(substream1);
|
||
|
snd_pcm_group_assign(substream1, target_group);
|
||
|
refcount_inc(&target_group->refs);
|
||
|
snd_pcm_stream_unlock(substream1);
|
||
|
snd_pcm_group_unlock_irq(target_group, nonatomic);
|
||
|
_end:
|
||
|
up_write(&snd_pcm_link_rwsem);
|
||
|
_nolock:
|
||
|
kfree(group);
|
||
|
_badf:
|
||
|
fdput(f);
|
||
|
return res;
|
||
|
}
|
||
|
|
||
|
static void relink_to_local(struct snd_pcm_substream *substream)
|
||
|
{
|
||
|
snd_pcm_stream_lock_nested(substream);
|
||
|
snd_pcm_group_assign(substream, &substream->self_group);
|
||
|
snd_pcm_stream_unlock(substream);
|
||
|
}
|
||
|
|
||
|
static int snd_pcm_unlink(struct snd_pcm_substream *substream)
|
||
|
{
|
||
|
struct snd_pcm_group *group;
|
||
|
bool nonatomic = substream->pcm->nonatomic;
|
||
|
bool do_free = false;
|
||
|
int res = 0;
|
||
|
|
||
|
down_write(&snd_pcm_link_rwsem);
|
||
|
|
||
|
if (!snd_pcm_stream_linked(substream)) {
|
||
|
res = -EALREADY;
|
||
|
goto _end;
|
||
|
}
|
||
|
|
||
|
group = substream->group;
|
||
|
snd_pcm_group_lock_irq(group, nonatomic);
|
||
|
|
||
|
relink_to_local(substream);
|
||
|
refcount_dec(&group->refs);
|
||
|
|
||
|
/* detach the last stream, too */
|
||
|
if (list_is_singular(&group->substreams)) {
|
||
|
relink_to_local(list_first_entry(&group->substreams,
|
||
|
struct snd_pcm_substream,
|
||
|
link_list));
|
||
|
do_free = refcount_dec_and_test(&group->refs);
|
||
|
}
|
||
|
|
||
|
snd_pcm_group_unlock_irq(group, nonatomic);
|
||
|
if (do_free)
|
||
|
kfree(group);
|
||
|
|
||
|
_end:
|
||
|
up_write(&snd_pcm_link_rwsem);
|
||
|
return res;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* hw configurator
|
||
|
*/
|
||
|
static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
|
||
|
struct snd_pcm_hw_rule *rule)
|
||
|
{
|
||
|
struct snd_interval t;
|
||
|
snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
|
||
|
hw_param_interval_c(params, rule->deps[1]), &t);
|
||
|
return snd_interval_refine(hw_param_interval(params, rule->var), &t);
|
||
|
}
|
||
|
|
||
|
static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
|
||
|
struct snd_pcm_hw_rule *rule)
|
||
|
{
|
||
|
struct snd_interval t;
|
||
|
snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
|
||
|
hw_param_interval_c(params, rule->deps[1]), &t);
|
||
|
return snd_interval_refine(hw_param_interval(params, rule->var), &t);
|
||
|
}
|
||
|
|
||
|
static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
|
||
|
struct snd_pcm_hw_rule *rule)
|
||
|
{
|
||
|
struct snd_interval t;
|
||
|
snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
|
||
|
hw_param_interval_c(params, rule->deps[1]),
|
||
|
(unsigned long) rule->private, &t);
|
||
|
return snd_interval_refine(hw_param_interval(params, rule->var), &t);
|
||
|
}
|
||
|
|
||
|
static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
|
||
|
struct snd_pcm_hw_rule *rule)
|
||
|
{
|
||
|
struct snd_interval t;
|
||
|
snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
|
||
|
(unsigned long) rule->private,
|
||
|
hw_param_interval_c(params, rule->deps[1]), &t);
|
||
|
return snd_interval_refine(hw_param_interval(params, rule->var), &t);
|
||
|
}
|
||
|
|
||
|
static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
|
||
|
struct snd_pcm_hw_rule *rule)
|
||
|
{
|
||
|
snd_pcm_format_t k;
|
||
|
const struct snd_interval *i =
|
||
|
hw_param_interval_c(params, rule->deps[0]);
|
||
|
struct snd_mask m;
|
||
|
struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
|
||
|
snd_mask_any(&m);
|
||
|
pcm_for_each_format(k) {
|
||
|
int bits;
|
||
|
if (!snd_mask_test_format(mask, k))
|
||
|
continue;
|
||
|
bits = snd_pcm_format_physical_width(k);
|
||
|
if (bits <= 0)
|
||
|
continue; /* ignore invalid formats */
|
||
|
if ((unsigned)bits < i->min || (unsigned)bits > i->max)
|
||
|
snd_mask_reset(&m, (__force unsigned)k);
|
||
|
}
|
||
|
return snd_mask_refine(mask, &m);
|
||
|
}
|
||
|
|
||
|
static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
|
||
|
struct snd_pcm_hw_rule *rule)
|
||
|
{
|
||
|
struct snd_interval t;
|
||
|
snd_pcm_format_t k;
|
||
|
|
||
|
t.min = UINT_MAX;
|
||
|
t.max = 0;
|
||
|
t.openmin = 0;
|
||
|
t.openmax = 0;
|
||
|
pcm_for_each_format(k) {
|
||
|
int bits;
|
||
|
if (!snd_mask_test_format(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
|
||
|
continue;
|
||
|
bits = snd_pcm_format_physical_width(k);
|
||
|
if (bits <= 0)
|
||
|
continue; /* ignore invalid formats */
|
||
|
if (t.min > (unsigned)bits)
|
||
|
t.min = bits;
|
||
|
if (t.max < (unsigned)bits)
|
||
|
t.max = bits;
|
||
|
}
|
||
|
t.integer = 1;
|
||
|
return snd_interval_refine(hw_param_interval(params, rule->var), &t);
|
||
|
}
|
||
|
|
||
|
#if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
|
||
|
#error "Change this table"
|
||
|
#endif
|
||
|
|
||
|
static const unsigned int rates[] = {
|
||
|
5512, 8000, 11025, 16000, 22050, 32000, 44100,
|
||
|
48000, 64000, 88200, 96000, 176400, 192000, 352800, 384000
|
||
|
};
|
||
|
|
||
|
const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
|
||
|
.count = ARRAY_SIZE(rates),
|
||
|
.list = rates,
|
||
|
};
|
||
|
|
||
|
static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
|
||
|
struct snd_pcm_hw_rule *rule)
|
||
|
{
|
||
|
struct snd_pcm_hardware *hw = rule->private;
|
||
|
return snd_interval_list(hw_param_interval(params, rule->var),
|
||
|
snd_pcm_known_rates.count,
|
||
|
snd_pcm_known_rates.list, hw->rates);
|
||
|
}
|
||
|
|
||
|
static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
|
||
|
struct snd_pcm_hw_rule *rule)
|
||
|
{
|
||
|
struct snd_interval t;
|
||
|
struct snd_pcm_substream *substream = rule->private;
|
||
|
t.min = 0;
|
||
|
t.max = substream->buffer_bytes_max;
|
||
|
t.openmin = 0;
|
||
|
t.openmax = 0;
|
||
|
t.integer = 1;
|
||
|
return snd_interval_refine(hw_param_interval(params, rule->var), &t);
|
||
|
}
|
||
|
|
||
|
static int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
|
||
|
{
|
||
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
||
|
struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
|
||
|
int k, err;
|
||
|
|
||
|
for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
|
||
|
snd_mask_any(constrs_mask(constrs, k));
|
||
|
}
|
||
|
|
||
|
for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
|
||
|
snd_interval_any(constrs_interval(constrs, k));
|
||
|
}
|
||
|
|
||
|
snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
|
||
|
snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
|
||
|
snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
|
||
|
snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
|
||
|
snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
|
||
|
|
||
|
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
|
||
|
snd_pcm_hw_rule_format, NULL,
|
||
|
SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
|
||
|
if (err < 0)
|
||
|
return err;
|
||
|
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
|
||
|
snd_pcm_hw_rule_sample_bits, NULL,
|
||
|
SNDRV_PCM_HW_PARAM_FORMAT,
|
||
|
SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
|
||
|
if (err < 0)
|
||
|
return err;
|
||
|
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
|
||
|
snd_pcm_hw_rule_div, NULL,
|
||
|
SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
|
||
|
if (err < 0)
|
||
|
return err;
|
||
|
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
|
||
|
snd_pcm_hw_rule_mul, NULL,
|
||
|
SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
|
||
|
if (err < 0)
|
||
|
return err;
|
||
|
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
|
||
|
snd_pcm_hw_rule_mulkdiv, (void*) 8,
|
||
|
SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
|
||
|
if (err < 0)
|
||
|
return err;
|
||
|
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
|
||
|
snd_pcm_hw_rule_mulkdiv, (void*) 8,
|
||
|
SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
|
||
|
if (err < 0)
|
||
|
return err;
|
||
|
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
|
||
|
snd_pcm_hw_rule_div, NULL,
|
||
|
SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
|
||
|
if (err < 0)
|
||
|
return err;
|
||
|
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
|
||
|
snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
|
||
|
SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
|
||
|
if (err < 0)
|
||
|
return err;
|
||
|
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
|
||
|
snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
|
||
|
SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
|
||
|
if (err < 0)
|
||
|
return err;
|
||
|
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
|
||
|
snd_pcm_hw_rule_div, NULL,
|
||
|
SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
|
||
|
if (err < 0)
|
||
|
return err;
|
||
|
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
|
||
|
snd_pcm_hw_rule_div, NULL,
|
||
|
SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
|
||
|
if (err < 0)
|
||
|
return err;
|
||
|
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
|
||
|
snd_pcm_hw_rule_mulkdiv, (void*) 8,
|
||
|
SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
|
||
|
if (err < 0)
|
||
|
return err;
|
||
|
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
|
||
|
snd_pcm_hw_rule_muldivk, (void*) 1000000,
|
||
|
SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
|
||
|
if (err < 0)
|
||
|
return err;
|
||
|
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
|
||
|
snd_pcm_hw_rule_mul, NULL,
|
||
|
SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
|
||
|
if (err < 0)
|
||
|
return err;
|
||
|
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
|
||
|
snd_pcm_hw_rule_mulkdiv, (void*) 8,
|
||
|
SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
|
||
|
if (err < 0)
|
||
|
return err;
|
||
|
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
|
||
|
snd_pcm_hw_rule_muldivk, (void*) 1000000,
|
||
|
SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
|
||
|
if (err < 0)
|
||
|
return err;
|
||
|
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
|
||
|
snd_pcm_hw_rule_muldivk, (void*) 8,
|
||
|
SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
|
||
|
if (err < 0)
|
||
|
return err;
|
||
|
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
|
||
|
snd_pcm_hw_rule_muldivk, (void*) 8,
|
||
|
SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
|
||
|
if (err < 0)
|
||
|
return err;
|
||
|
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
|
||
|
snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
|
||
|
SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
|
||
|
if (err < 0)
|
||
|
return err;
|
||
|
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
|
||
|
snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
|
||
|
SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
|
||
|
if (err < 0)
|
||
|
return err;
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
|
||
|
{
|
||
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
||
|
struct snd_pcm_hardware *hw = &runtime->hw;
|
||
|
int err;
|
||
|
unsigned int mask = 0;
|
||
|
|
||
|
if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
|
||
|
mask |= PARAM_MASK_BIT(SNDRV_PCM_ACCESS_RW_INTERLEAVED);
|
||
|
if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
|
||
|
mask |= PARAM_MASK_BIT(SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
|
||
|
if (hw_support_mmap(substream)) {
|
||
|
if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
|
||
|
mask |= PARAM_MASK_BIT(SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
|
||
|
if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
|
||
|
mask |= PARAM_MASK_BIT(SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED);
|
||
|
if (hw->info & SNDRV_PCM_INFO_COMPLEX)
|
||
|
mask |= PARAM_MASK_BIT(SNDRV_PCM_ACCESS_MMAP_COMPLEX);
|
||
|
}
|
||
|
err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
|
||
|
if (err < 0)
|
||
|
return err;
|
||
|
|
||
|
err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
|
||
|
if (err < 0)
|
||
|
return err;
|
||
|
|
||
|
err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT,
|
||
|
PARAM_MASK_BIT(SNDRV_PCM_SUBFORMAT_STD));
|
||
|
if (err < 0)
|
||
|
return err;
|
||
|
|
||
|
err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
|
||
|
hw->channels_min, hw->channels_max);
|
||
|
if (err < 0)
|
||
|
return err;
|
||
|
|
||
|
err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
|
||
|
hw->rate_min, hw->rate_max);
|
||
|
if (err < 0)
|
||
|
return err;
|
||
|
|
||
|
err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
|
||
|
hw->period_bytes_min, hw->period_bytes_max);
|
||
|
if (err < 0)
|
||
|
return err;
|
||
|
|
||
|
err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
|
||
|
hw->periods_min, hw->periods_max);
|
||
|
if (err < 0)
|
||
|
return err;
|
||
|
|
||
|
err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
|
||
|
hw->period_bytes_min, hw->buffer_bytes_max);
|
||
|
if (err < 0)
|
||
|
return err;
|
||
|
|
||
|
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
|
||
|
snd_pcm_hw_rule_buffer_bytes_max, substream,
|
||
|
SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
|
||
|
if (err < 0)
|
||
|
return err;
|
||
|
|
||
|
/* FIXME: remove */
|
||
|
if (runtime->dma_bytes) {
|
||
|
err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
|
||
|
if (err < 0)
|
||
|
return err;
|
||
|
}
|
||
|
|
||
|
if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
|
||
|
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
|
||
|
snd_pcm_hw_rule_rate, hw,
|
||
|
SNDRV_PCM_HW_PARAM_RATE, -1);
|
||
|
if (err < 0)
|
||
|
return err;
|
||
|
}
|
||
|
|
||
|
/* FIXME: this belong to lowlevel */
|
||
|
snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static void pcm_release_private(struct snd_pcm_substream *substream)
|
||
|
{
|
||
|
if (snd_pcm_stream_linked(substream))
|
||
|
snd_pcm_unlink(substream);
|
||
|
}
|
||
|
|
||
|
void snd_pcm_release_substream(struct snd_pcm_substream *substream)
|
||
|
{
|
||
|
substream->ref_count--;
|
||
|
if (substream->ref_count > 0)
|
||
|
return;
|
||
|
|
||
|
snd_pcm_drop(substream);
|
||
|
if (substream->hw_opened) {
|
||
|
if (substream->runtime->state != SNDRV_PCM_STATE_OPEN)
|
||
|
do_hw_free(substream);
|
||
|
substream->ops->close(substream);
|
||
|
substream->hw_opened = 0;
|
||
|
}
|
||
|
if (cpu_latency_qos_request_active(&substream->latency_pm_qos_req))
|
||
|
cpu_latency_qos_remove_request(&substream->latency_pm_qos_req);
|
||
|
if (substream->pcm_release) {
|
||
|
substream->pcm_release(substream);
|
||
|
substream->pcm_release = NULL;
|
||
|
}
|
||
|
snd_pcm_detach_substream(substream);
|
||
|
}
|
||
|
EXPORT_SYMBOL(snd_pcm_release_substream);
|
||
|
|
||
|
int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
|
||
|
struct file *file,
|
||
|
struct snd_pcm_substream **rsubstream)
|
||
|
{
|
||
|
struct snd_pcm_substream *substream;
|
||
|
int err;
|
||
|
|
||
|
err = snd_pcm_attach_substream(pcm, stream, file, &substream);
|
||
|
if (err < 0)
|
||
|
return err;
|
||
|
if (substream->ref_count > 1) {
|
||
|
*rsubstream = substream;
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
err = snd_pcm_hw_constraints_init(substream);
|
||
|
if (err < 0) {
|
||
|
pcm_dbg(pcm, "snd_pcm_hw_constraints_init failed\n");
|
||
|
goto error;
|
||
|
}
|
||
|
|
||
|
err = substream->ops->open(substream);
|
||
|
if (err < 0)
|
||
|
goto error;
|
||
|
|
||
|
substream->hw_opened = 1;
|
||
|
|
||
|
err = snd_pcm_hw_constraints_complete(substream);
|
||
|
if (err < 0) {
|
||
|
pcm_dbg(pcm, "snd_pcm_hw_constraints_complete failed\n");
|
||
|
goto error;
|
||
|
}
|
||
|
|
||
|
/* automatically set EXPLICIT_SYNC flag in the managed mode whenever
|
||
|
* the DMA buffer requires it
|
||
|
*/
|
||
|
if (substream->managed_buffer_alloc &&
|
||
|
substream->dma_buffer.dev.need_sync)
|
||
|
substream->runtime->hw.info |= SNDRV_PCM_INFO_EXPLICIT_SYNC;
|
||
|
|
||
|
*rsubstream = substream;
|
||
|
return 0;
|
||
|
|
||
|
error:
|
||
|
snd_pcm_release_substream(substream);
|
||
|
return err;
|
||
|
}
|
||
|
EXPORT_SYMBOL(snd_pcm_open_substream);
|
||
|
|
||
|
static int snd_pcm_open_file(struct file *file,
|
||
|
struct snd_pcm *pcm,
|
||
|
int stream)
|
||
|
{
|
||
|
struct snd_pcm_file *pcm_file;
|
||
|
struct snd_pcm_substream *substream;
|
||
|
int err;
|
||
|
|
||
|
err = snd_pcm_open_substream(pcm, stream, file, &substream);
|
||
|
if (err < 0)
|
||
|
return err;
|
||
|
|
||
|
pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
|
||
|
if (pcm_file == NULL) {
|
||
|
snd_pcm_release_substream(substream);
|
||
|
return -ENOMEM;
|
||
|
}
|
||
|
pcm_file->substream = substream;
|
||
|
if (substream->ref_count == 1)
|
||
|
substream->pcm_release = pcm_release_private;
|
||
|
file->private_data = pcm_file;
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int snd_pcm_playback_open(struct inode *inode, struct file *file)
|
||
|
{
|
||
|
struct snd_pcm *pcm;
|
||
|
int err = nonseekable_open(inode, file);
|
||
|
if (err < 0)
|
||
|
return err;
|
||
|
pcm = snd_lookup_minor_data(iminor(inode),
|
||
|
SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
|
||
|
err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
|
||
|
if (pcm)
|
||
|
snd_card_unref(pcm->card);
|
||
|
return err;
|
||
|
}
|
||
|
|
||
|
static int snd_pcm_capture_open(struct inode *inode, struct file *file)
|
||
|
{
|
||
|
struct snd_pcm *pcm;
|
||
|
int err = nonseekable_open(inode, file);
|
||
|
if (err < 0)
|
||
|
return err;
|
||
|
pcm = snd_lookup_minor_data(iminor(inode),
|
||
|
SNDRV_DEVICE_TYPE_PCM_CAPTURE);
|
||
|
err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
|
||
|
if (pcm)
|
||
|
snd_card_unref(pcm->card);
|
||
|
return err;
|
||
|
}
|
||
|
|
||
|
static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
|
||
|
{
|
||
|
int err;
|
||
|
wait_queue_entry_t wait;
|
||
|
|
||
|
if (pcm == NULL) {
|
||
|
err = -ENODEV;
|
||
|
goto __error1;
|
||
|
}
|
||
|
err = snd_card_file_add(pcm->card, file);
|
||
|
if (err < 0)
|
||
|
goto __error1;
|
||
|
if (!try_module_get(pcm->card->module)) {
|
||
|
err = -EFAULT;
|
||
|
goto __error2;
|
||
|
}
|
||
|
init_waitqueue_entry(&wait, current);
|
||
|
add_wait_queue(&pcm->open_wait, &wait);
|
||
|
mutex_lock(&pcm->open_mutex);
|
||
|
while (1) {
|
||
|
err = snd_pcm_open_file(file, pcm, stream);
|
||
|
if (err >= 0)
|
||
|
break;
|
||
|
if (err == -EAGAIN) {
|
||
|
if (file->f_flags & O_NONBLOCK) {
|
||
|
err = -EBUSY;
|
||
|
break;
|
||
|
}
|
||
|
} else
|
||
|
break;
|
||
|
set_current_state(TASK_INTERRUPTIBLE);
|
||
|
mutex_unlock(&pcm->open_mutex);
|
||
|
schedule();
|
||
|
mutex_lock(&pcm->open_mutex);
|
||
|
if (pcm->card->shutdown) {
|
||
|
err = -ENODEV;
|
||
|
break;
|
||
|
}
|
||
|
if (signal_pending(current)) {
|
||
|
err = -ERESTARTSYS;
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
remove_wait_queue(&pcm->open_wait, &wait);
|
||
|
mutex_unlock(&pcm->open_mutex);
|
||
|
if (err < 0)
|
||
|
goto __error;
|
||
|
return err;
|
||
|
|
||
|
__error:
|
||
|
module_put(pcm->card->module);
|
||
|
__error2:
|
||
|
snd_card_file_remove(pcm->card, file);
|
||
|
__error1:
|
||
|
return err;
|
||
|
}
|
||
|
|
||
|
static int snd_pcm_release(struct inode *inode, struct file *file)
|
||
|
{
|
||
|
struct snd_pcm *pcm;
|
||
|
struct snd_pcm_substream *substream;
|
||
|
struct snd_pcm_file *pcm_file;
|
||
|
|
||
|
pcm_file = file->private_data;
|
||
|
substream = pcm_file->substream;
|
||
|
if (snd_BUG_ON(!substream))
|
||
|
return -ENXIO;
|
||
|
pcm = substream->pcm;
|
||
|
|
||
|
/* block until the device gets woken up as it may touch the hardware */
|
||
|
snd_power_wait(pcm->card);
|
||
|
|
||
|
mutex_lock(&pcm->open_mutex);
|
||
|
snd_pcm_release_substream(substream);
|
||
|
kfree(pcm_file);
|
||
|
mutex_unlock(&pcm->open_mutex);
|
||
|
wake_up(&pcm->open_wait);
|
||
|
module_put(pcm->card->module);
|
||
|
snd_card_file_remove(pcm->card, file);
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
/* check and update PCM state; return 0 or a negative error
|
||
|
* call this inside PCM lock
|
||
|
*/
|
||
|
static int do_pcm_hwsync(struct snd_pcm_substream *substream)
|
||
|
{
|
||
|
switch (substream->runtime->state) {
|
||
|
case SNDRV_PCM_STATE_DRAINING:
|
||
|
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
|
||
|
return -EBADFD;
|
||
|
fallthrough;
|
||
|
case SNDRV_PCM_STATE_RUNNING:
|
||
|
return snd_pcm_update_hw_ptr(substream);
|
||
|
case SNDRV_PCM_STATE_PREPARED:
|
||
|
case SNDRV_PCM_STATE_PAUSED:
|
||
|
return 0;
|
||
|
case SNDRV_PCM_STATE_SUSPENDED:
|
||
|
return -ESTRPIPE;
|
||
|
case SNDRV_PCM_STATE_XRUN:
|
||
|
return -EPIPE;
|
||
|
default:
|
||
|
return -EBADFD;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/* increase the appl_ptr; returns the processed frames or a negative error */
|
||
|
static snd_pcm_sframes_t forward_appl_ptr(struct snd_pcm_substream *substream,
|
||
|
snd_pcm_uframes_t frames,
|
||
|
snd_pcm_sframes_t avail)
|
||
|
{
|
||
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
||
|
snd_pcm_sframes_t appl_ptr;
|
||
|
int ret;
|
||
|
|
||
|
if (avail <= 0)
|
||
|
return 0;
|
||
|
if (frames > (snd_pcm_uframes_t)avail)
|
||
|
frames = avail;
|
||
|
appl_ptr = runtime->control->appl_ptr + frames;
|
||
|
if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
|
||
|
appl_ptr -= runtime->boundary;
|
||
|
ret = pcm_lib_apply_appl_ptr(substream, appl_ptr);
|
||
|
return ret < 0 ? ret : frames;
|
||
|
}
|
||
|
|
||
|
/* decrease the appl_ptr; returns the processed frames or zero for error */
|
||
|
static snd_pcm_sframes_t rewind_appl_ptr(struct snd_pcm_substream *substream,
|
||
|
snd_pcm_uframes_t frames,
|
||
|
snd_pcm_sframes_t avail)
|
||
|
{
|
||
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
||
|
snd_pcm_sframes_t appl_ptr;
|
||
|
int ret;
|
||
|
|
||
|
if (avail <= 0)
|
||
|
return 0;
|
||
|
if (frames > (snd_pcm_uframes_t)avail)
|
||
|
frames = avail;
|
||
|
appl_ptr = runtime->control->appl_ptr - frames;
|
||
|
if (appl_ptr < 0)
|
||
|
appl_ptr += runtime->boundary;
|
||
|
ret = pcm_lib_apply_appl_ptr(substream, appl_ptr);
|
||
|
/* NOTE: we return zero for errors because PulseAudio gets depressed
|
||
|
* upon receiving an error from rewind ioctl and stops processing
|
||
|
* any longer. Returning zero means that no rewind is done, so
|
||
|
* it's not absolutely wrong to answer like that.
|
||
|
*/
|
||
|
return ret < 0 ? 0 : frames;
|
||
|
}
|
||
|
|
||
|
static snd_pcm_sframes_t snd_pcm_rewind(struct snd_pcm_substream *substream,
|
||
|
snd_pcm_uframes_t frames)
|
||
|
{
|
||
|
snd_pcm_sframes_t ret;
|
||
|
|
||
|
if (frames == 0)
|
||
|
return 0;
|
||
|
|
||
|
snd_pcm_stream_lock_irq(substream);
|
||
|
ret = do_pcm_hwsync(substream);
|
||
|
if (!ret)
|
||
|
ret = rewind_appl_ptr(substream, frames,
|
||
|
snd_pcm_hw_avail(substream));
|
||
|
snd_pcm_stream_unlock_irq(substream);
|
||
|
if (ret >= 0)
|
||
|
snd_pcm_dma_buffer_sync(substream, SNDRV_DMA_SYNC_DEVICE);
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
static snd_pcm_sframes_t snd_pcm_forward(struct snd_pcm_substream *substream,
|
||
|
snd_pcm_uframes_t frames)
|
||
|
{
|
||
|
snd_pcm_sframes_t ret;
|
||
|
|
||
|
if (frames == 0)
|
||
|
return 0;
|
||
|
|
||
|
snd_pcm_stream_lock_irq(substream);
|
||
|
ret = do_pcm_hwsync(substream);
|
||
|
if (!ret)
|
||
|
ret = forward_appl_ptr(substream, frames,
|
||
|
snd_pcm_avail(substream));
|
||
|
snd_pcm_stream_unlock_irq(substream);
|
||
|
if (ret >= 0)
|
||
|
snd_pcm_dma_buffer_sync(substream, SNDRV_DMA_SYNC_DEVICE);
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
static int snd_pcm_delay(struct snd_pcm_substream *substream,
|
||
|
snd_pcm_sframes_t *delay)
|
||
|
{
|
||
|
int err;
|
||
|
|
||
|
snd_pcm_stream_lock_irq(substream);
|
||
|
err = do_pcm_hwsync(substream);
|
||
|
if (delay && !err)
|
||
|
*delay = snd_pcm_calc_delay(substream);
|
||
|
snd_pcm_stream_unlock_irq(substream);
|
||
|
snd_pcm_dma_buffer_sync(substream, SNDRV_DMA_SYNC_CPU);
|
||
|
|
||
|
return err;
|
||
|
}
|
||
|
|
||
|
static inline int snd_pcm_hwsync(struct snd_pcm_substream *substream)
|
||
|
{
|
||
|
return snd_pcm_delay(substream, NULL);
|
||
|
}
|
||
|
|
||
|
static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
|
||
|
struct snd_pcm_sync_ptr __user *_sync_ptr)
|
||
|
{
|
||
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
||
|
struct snd_pcm_sync_ptr sync_ptr;
|
||
|
volatile struct snd_pcm_mmap_status *status;
|
||
|
volatile struct snd_pcm_mmap_control *control;
|
||
|
int err;
|
||
|
|
||
|
memset(&sync_ptr, 0, sizeof(sync_ptr));
|
||
|
if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
|
||
|
return -EFAULT;
|
||
|
if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
|
||
|
return -EFAULT;
|
||
|
status = runtime->status;
|
||
|
control = runtime->control;
|
||
|
if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
|
||
|
err = snd_pcm_hwsync(substream);
|
||
|
if (err < 0)
|
||
|
return err;
|
||
|
}
|
||
|
snd_pcm_stream_lock_irq(substream);
|
||
|
if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) {
|
||
|
err = pcm_lib_apply_appl_ptr(substream,
|
||
|
sync_ptr.c.control.appl_ptr);
|
||
|
if (err < 0) {
|
||
|
snd_pcm_stream_unlock_irq(substream);
|
||
|
return err;
|
||
|
}
|
||
|
} else {
|
||
|
sync_ptr.c.control.appl_ptr = control->appl_ptr;
|
||
|
}
|
||
|
if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
|
||
|
control->avail_min = sync_ptr.c.control.avail_min;
|
||
|
else
|
||
|
sync_ptr.c.control.avail_min = control->avail_min;
|
||
|
sync_ptr.s.status.state = status->state;
|
||
|
sync_ptr.s.status.hw_ptr = status->hw_ptr;
|
||
|
sync_ptr.s.status.tstamp = status->tstamp;
|
||
|
sync_ptr.s.status.suspended_state = status->suspended_state;
|
||
|
sync_ptr.s.status.audio_tstamp = status->audio_tstamp;
|
||
|
snd_pcm_stream_unlock_irq(substream);
|
||
|
if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
|
||
|
snd_pcm_dma_buffer_sync(substream, SNDRV_DMA_SYNC_DEVICE);
|
||
|
if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
|
||
|
return -EFAULT;
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
struct snd_pcm_mmap_status32 {
|
||
|
snd_pcm_state_t state;
|
||
|
s32 pad1;
|
||
|
u32 hw_ptr;
|
||
|
s32 tstamp_sec;
|
||
|
s32 tstamp_nsec;
|
||
|
snd_pcm_state_t suspended_state;
|
||
|
s32 audio_tstamp_sec;
|
||
|
s32 audio_tstamp_nsec;
|
||
|
} __attribute__((packed));
|
||
|
|
||
|
struct snd_pcm_mmap_control32 {
|
||
|
u32 appl_ptr;
|
||
|
u32 avail_min;
|
||
|
};
|
||
|
|
||
|
struct snd_pcm_sync_ptr32 {
|
||
|
u32 flags;
|
||
|
union {
|
||
|
struct snd_pcm_mmap_status32 status;
|
||
|
unsigned char reserved[64];
|
||
|
} s;
|
||
|
union {
|
||
|
struct snd_pcm_mmap_control32 control;
|
||
|
unsigned char reserved[64];
|
||
|
} c;
|
||
|
} __attribute__((packed));
|
||
|
|
||
|
/* recalcuate the boundary within 32bit */
|
||
|
static snd_pcm_uframes_t recalculate_boundary(struct snd_pcm_runtime *runtime)
|
||
|
{
|
||
|
snd_pcm_uframes_t boundary;
|
||
|
|
||
|
if (! runtime->buffer_size)
|
||
|
return 0;
|
||
|
boundary = runtime->buffer_size;
|
||
|
while (boundary * 2 <= 0x7fffffffUL - runtime->buffer_size)
|
||
|
boundary *= 2;
|
||
|
return boundary;
|
||
|
}
|
||
|
|
||
|
static int snd_pcm_ioctl_sync_ptr_compat(struct snd_pcm_substream *substream,
|
||
|
struct snd_pcm_sync_ptr32 __user *src)
|
||
|
{
|
||
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
||
|
volatile struct snd_pcm_mmap_status *status;
|
||
|
volatile struct snd_pcm_mmap_control *control;
|
||
|
u32 sflags;
|
||
|
struct snd_pcm_mmap_control scontrol;
|
||
|
struct snd_pcm_mmap_status sstatus;
|
||
|
snd_pcm_uframes_t boundary;
|
||
|
int err;
|
||
|
|
||
|
if (snd_BUG_ON(!runtime))
|
||
|
return -EINVAL;
|
||
|
|
||
|
if (get_user(sflags, &src->flags) ||
|
||
|
get_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
|
||
|
get_user(scontrol.avail_min, &src->c.control.avail_min))
|
||
|
return -EFAULT;
|
||
|
if (sflags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
|
||
|
err = snd_pcm_hwsync(substream);
|
||
|
if (err < 0)
|
||
|
return err;
|
||
|
}
|
||
|
status = runtime->status;
|
||
|
control = runtime->control;
|
||
|
boundary = recalculate_boundary(runtime);
|
||
|
if (! boundary)
|
||
|
boundary = 0x7fffffff;
|
||
|
snd_pcm_stream_lock_irq(substream);
|
||
|
/* FIXME: we should consider the boundary for the sync from app */
|
||
|
if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL)) {
|
||
|
err = pcm_lib_apply_appl_ptr(substream,
|
||
|
scontrol.appl_ptr);
|
||
|
if (err < 0) {
|
||
|
snd_pcm_stream_unlock_irq(substream);
|
||
|
return err;
|
||
|
}
|
||
|
} else
|
||
|
scontrol.appl_ptr = control->appl_ptr % boundary;
|
||
|
if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
|
||
|
control->avail_min = scontrol.avail_min;
|
||
|
else
|
||
|
scontrol.avail_min = control->avail_min;
|
||
|
sstatus.state = status->state;
|
||
|
sstatus.hw_ptr = status->hw_ptr % boundary;
|
||
|
sstatus.tstamp = status->tstamp;
|
||
|
sstatus.suspended_state = status->suspended_state;
|
||
|
sstatus.audio_tstamp = status->audio_tstamp;
|
||
|
snd_pcm_stream_unlock_irq(substream);
|
||
|
if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL))
|
||
|
snd_pcm_dma_buffer_sync(substream, SNDRV_DMA_SYNC_DEVICE);
|
||
|
if (put_user(sstatus.state, &src->s.status.state) ||
|
||
|
put_user(sstatus.hw_ptr, &src->s.status.hw_ptr) ||
|
||
|
put_user(sstatus.tstamp.tv_sec, &src->s.status.tstamp_sec) ||
|
||
|
put_user(sstatus.tstamp.tv_nsec, &src->s.status.tstamp_nsec) ||
|
||
|
put_user(sstatus.suspended_state, &src->s.status.suspended_state) ||
|
||
|
put_user(sstatus.audio_tstamp.tv_sec, &src->s.status.audio_tstamp_sec) ||
|
||
|
put_user(sstatus.audio_tstamp.tv_nsec, &src->s.status.audio_tstamp_nsec) ||
|
||
|
put_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
|
||
|
put_user(scontrol.avail_min, &src->c.control.avail_min))
|
||
|
return -EFAULT;
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
#define __SNDRV_PCM_IOCTL_SYNC_PTR32 _IOWR('A', 0x23, struct snd_pcm_sync_ptr32)
|
||
|
|
||
|
static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
|
||
|
{
|
||
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
||
|
int arg;
|
||
|
|
||
|
if (get_user(arg, _arg))
|
||
|
return -EFAULT;
|
||
|
if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
|
||
|
return -EINVAL;
|
||
|
runtime->tstamp_type = arg;
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int snd_pcm_xferi_frames_ioctl(struct snd_pcm_substream *substream,
|
||
|
struct snd_xferi __user *_xferi)
|
||
|
{
|
||
|
struct snd_xferi xferi;
|
||
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
||
|
snd_pcm_sframes_t result;
|
||
|
|
||
|
if (runtime->state == SNDRV_PCM_STATE_OPEN)
|
||
|
return -EBADFD;
|
||
|
if (put_user(0, &_xferi->result))
|
||
|
return -EFAULT;
|
||
|
if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
|
||
|
return -EFAULT;
|
||
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
|
||
|
result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
|
||
|
else
|
||
|
result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
|
||
|
if (put_user(result, &_xferi->result))
|
||
|
return -EFAULT;
|
||
|
return result < 0 ? result : 0;
|
||
|
}
|
||
|
|
||
|
static int snd_pcm_xfern_frames_ioctl(struct snd_pcm_substream *substream,
|
||
|
struct snd_xfern __user *_xfern)
|
||
|
{
|
||
|
struct snd_xfern xfern;
|
||
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
||
|
void *bufs;
|
||
|
snd_pcm_sframes_t result;
|
||
|
|
||
|
if (runtime->state == SNDRV_PCM_STATE_OPEN)
|
||
|
return -EBADFD;
|
||
|
if (runtime->channels > 128)
|
||
|
return -EINVAL;
|
||
|
if (put_user(0, &_xfern->result))
|
||
|
return -EFAULT;
|
||
|
if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
|
||
|
return -EFAULT;
|
||
|
|
||
|
bufs = memdup_user(xfern.bufs, sizeof(void *) * runtime->channels);
|
||
|
if (IS_ERR(bufs))
|
||
|
return PTR_ERR(bufs);
|
||
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
|
||
|
result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
|
||
|
else
|
||
|
result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
|
||
|
kfree(bufs);
|
||
|
if (put_user(result, &_xfern->result))
|
||
|
return -EFAULT;
|
||
|
return result < 0 ? result : 0;
|
||
|
}
|
||
|
|
||
|
static int snd_pcm_rewind_ioctl(struct snd_pcm_substream *substream,
|
||
|
snd_pcm_uframes_t __user *_frames)
|
||
|
{
|
||
|
snd_pcm_uframes_t frames;
|
||
|
snd_pcm_sframes_t result;
|
||
|
|
||
|
if (get_user(frames, _frames))
|
||
|
return -EFAULT;
|
||
|
if (put_user(0, _frames))
|
||
|
return -EFAULT;
|
||
|
result = snd_pcm_rewind(substream, frames);
|
||
|
if (put_user(result, _frames))
|
||
|
return -EFAULT;
|
||
|
return result < 0 ? result : 0;
|
||
|
}
|
||
|
|
||
|
static int snd_pcm_forward_ioctl(struct snd_pcm_substream *substream,
|
||
|
snd_pcm_uframes_t __user *_frames)
|
||
|
{
|
||
|
snd_pcm_uframes_t frames;
|
||
|
snd_pcm_sframes_t result;
|
||
|
|
||
|
if (get_user(frames, _frames))
|
||
|
return -EFAULT;
|
||
|
if (put_user(0, _frames))
|
||
|
return -EFAULT;
|
||
|
result = snd_pcm_forward(substream, frames);
|
||
|
if (put_user(result, _frames))
|
||
|
return -EFAULT;
|
||
|
return result < 0 ? result : 0;
|
||
|
}
|
||
|
|
||
|
static int snd_pcm_common_ioctl(struct file *file,
|
||
|
struct snd_pcm_substream *substream,
|
||
|
unsigned int cmd, void __user *arg)
|
||
|
{
|
||
|
struct snd_pcm_file *pcm_file = file->private_data;
|
||
|
int res;
|
||
|
|
||
|
if (PCM_RUNTIME_CHECK(substream))
|
||
|
return -ENXIO;
|
||
|
|
||
|
if (substream->runtime->state == SNDRV_PCM_STATE_DISCONNECTED)
|
||
|
return -EBADFD;
|
||
|
|
||
|
res = snd_power_wait(substream->pcm->card);
|
||
|
if (res < 0)
|
||
|
return res;
|
||
|
|
||
|
switch (cmd) {
|
||
|
case SNDRV_PCM_IOCTL_PVERSION:
|
||
|
return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
|
||
|
case SNDRV_PCM_IOCTL_INFO:
|
||
|
return snd_pcm_info_user(substream, arg);
|
||
|
case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
|
||
|
return 0;
|
||
|
case SNDRV_PCM_IOCTL_TTSTAMP:
|
||
|
return snd_pcm_tstamp(substream, arg);
|
||
|
case SNDRV_PCM_IOCTL_USER_PVERSION:
|
||
|
if (get_user(pcm_file->user_pversion,
|
||
|
(unsigned int __user *)arg))
|
||
|
return -EFAULT;
|
||
|
return 0;
|
||
|
case SNDRV_PCM_IOCTL_HW_REFINE:
|
||
|
return snd_pcm_hw_refine_user(substream, arg);
|
||
|
case SNDRV_PCM_IOCTL_HW_PARAMS:
|
||
|
return snd_pcm_hw_params_user(substream, arg);
|
||
|
case SNDRV_PCM_IOCTL_HW_FREE:
|
||
|
return snd_pcm_hw_free(substream);
|
||
|
case SNDRV_PCM_IOCTL_SW_PARAMS:
|
||
|
return snd_pcm_sw_params_user(substream, arg);
|
||
|
case SNDRV_PCM_IOCTL_STATUS32:
|
||
|
return snd_pcm_status_user32(substream, arg, false);
|
||
|
case SNDRV_PCM_IOCTL_STATUS_EXT32:
|
||
|
return snd_pcm_status_user32(substream, arg, true);
|
||
|
case SNDRV_PCM_IOCTL_STATUS64:
|
||
|
return snd_pcm_status_user64(substream, arg, false);
|
||
|
case SNDRV_PCM_IOCTL_STATUS_EXT64:
|
||
|
return snd_pcm_status_user64(substream, arg, true);
|
||
|
case SNDRV_PCM_IOCTL_CHANNEL_INFO:
|
||
|
return snd_pcm_channel_info_user(substream, arg);
|
||
|
case SNDRV_PCM_IOCTL_PREPARE:
|
||
|
return snd_pcm_prepare(substream, file);
|
||
|
case SNDRV_PCM_IOCTL_RESET:
|
||
|
return snd_pcm_reset(substream);
|
||
|
case SNDRV_PCM_IOCTL_START:
|
||
|
return snd_pcm_start_lock_irq(substream);
|
||
|
case SNDRV_PCM_IOCTL_LINK:
|
||
|
return snd_pcm_link(substream, (int)(unsigned long) arg);
|
||
|
case SNDRV_PCM_IOCTL_UNLINK:
|
||
|
return snd_pcm_unlink(substream);
|
||
|
case SNDRV_PCM_IOCTL_RESUME:
|
||
|
return snd_pcm_resume(substream);
|
||
|
case SNDRV_PCM_IOCTL_XRUN:
|
||
|
return snd_pcm_xrun(substream);
|
||
|
case SNDRV_PCM_IOCTL_HWSYNC:
|
||
|
return snd_pcm_hwsync(substream);
|
||
|
case SNDRV_PCM_IOCTL_DELAY:
|
||
|
{
|
||
|
snd_pcm_sframes_t delay = 0;
|
||
|
snd_pcm_sframes_t __user *res = arg;
|
||
|
int err;
|
||
|
|
||
|
err = snd_pcm_delay(substream, &delay);
|
||
|
if (err)
|
||
|
return err;
|
||
|
if (put_user(delay, res))
|
||
|
return -EFAULT;
|
||
|
return 0;
|
||
|
}
|
||
|
case __SNDRV_PCM_IOCTL_SYNC_PTR32:
|
||
|
return snd_pcm_ioctl_sync_ptr_compat(substream, arg);
|
||
|
case __SNDRV_PCM_IOCTL_SYNC_PTR64:
|
||
|
return snd_pcm_sync_ptr(substream, arg);
|
||
|
#ifdef CONFIG_SND_SUPPORT_OLD_API
|
||
|
case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
|
||
|
return snd_pcm_hw_refine_old_user(substream, arg);
|
||
|
case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
|
||
|
return snd_pcm_hw_params_old_user(substream, arg);
|
||
|
#endif
|
||
|
case SNDRV_PCM_IOCTL_DRAIN:
|
||
|
return snd_pcm_drain(substream, file);
|
||
|
case SNDRV_PCM_IOCTL_DROP:
|
||
|
return snd_pcm_drop(substream);
|
||
|
case SNDRV_PCM_IOCTL_PAUSE:
|
||
|
return snd_pcm_pause_lock_irq(substream, (unsigned long)arg);
|
||
|
case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
|
||
|
case SNDRV_PCM_IOCTL_READI_FRAMES:
|
||
|
return snd_pcm_xferi_frames_ioctl(substream, arg);
|
||
|
case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
|
||
|
case SNDRV_PCM_IOCTL_READN_FRAMES:
|
||
|
return snd_pcm_xfern_frames_ioctl(substream, arg);
|
||
|
case SNDRV_PCM_IOCTL_REWIND:
|
||
|
return snd_pcm_rewind_ioctl(substream, arg);
|
||
|
case SNDRV_PCM_IOCTL_FORWARD:
|
||
|
return snd_pcm_forward_ioctl(substream, arg);
|
||
|
}
|
||
|
pcm_dbg(substream->pcm, "unknown ioctl = 0x%x\n", cmd);
|
||
|
return -ENOTTY;
|
||
|
}
|
||
|
|
||
|
static long snd_pcm_ioctl(struct file *file, unsigned int cmd,
|
||
|
unsigned long arg)
|
||
|
{
|
||
|
struct snd_pcm_file *pcm_file;
|
||
|
|
||
|
pcm_file = file->private_data;
|
||
|
|
||
|
if (((cmd >> 8) & 0xff) != 'A')
|
||
|
return -ENOTTY;
|
||
|
|
||
|
return snd_pcm_common_ioctl(file, pcm_file->substream, cmd,
|
||
|
(void __user *)arg);
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* snd_pcm_kernel_ioctl - Execute PCM ioctl in the kernel-space
|
||
|
* @substream: PCM substream
|
||
|
* @cmd: IOCTL cmd
|
||
|
* @arg: IOCTL argument
|
||
|
*
|
||
|
* The function is provided primarily for OSS layer and USB gadget drivers,
|
||
|
* and it allows only the limited set of ioctls (hw_params, sw_params,
|
||
|
* prepare, start, drain, drop, forward).
|
||
|
*
|
||
|
* Return: zero if successful, or a negative error code
|
||
|
*/
|
||
|
int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
|
||
|
unsigned int cmd, void *arg)
|
||
|
{
|
||
|
snd_pcm_uframes_t *frames = arg;
|
||
|
snd_pcm_sframes_t result;
|
||
|
|
||
|
if (substream->runtime->state == SNDRV_PCM_STATE_DISCONNECTED)
|
||
|
return -EBADFD;
|
||
|
|
||
|
switch (cmd) {
|
||
|
case SNDRV_PCM_IOCTL_FORWARD:
|
||
|
{
|
||
|
/* provided only for OSS; capture-only and no value returned */
|
||
|
if (substream->stream != SNDRV_PCM_STREAM_CAPTURE)
|
||
|
return -EINVAL;
|
||
|
result = snd_pcm_forward(substream, *frames);
|
||
|
return result < 0 ? result : 0;
|
||
|
}
|
||
|
case SNDRV_PCM_IOCTL_HW_PARAMS:
|
||
|
return snd_pcm_hw_params(substream, arg);
|
||
|
case SNDRV_PCM_IOCTL_SW_PARAMS:
|
||
|
return snd_pcm_sw_params(substream, arg);
|
||
|
case SNDRV_PCM_IOCTL_PREPARE:
|
||
|
return snd_pcm_prepare(substream, NULL);
|
||
|
case SNDRV_PCM_IOCTL_START:
|
||
|
return snd_pcm_start_lock_irq(substream);
|
||
|
case SNDRV_PCM_IOCTL_DRAIN:
|
||
|
return snd_pcm_drain(substream, NULL);
|
||
|
case SNDRV_PCM_IOCTL_DROP:
|
||
|
return snd_pcm_drop(substream);
|
||
|
case SNDRV_PCM_IOCTL_DELAY:
|
||
|
return snd_pcm_delay(substream, frames);
|
||
|
default:
|
||
|
return -EINVAL;
|
||
|
}
|
||
|
}
|
||
|
EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
|
||
|
|
||
|
static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
|
||
|
loff_t * offset)
|
||
|
{
|
||
|
struct snd_pcm_file *pcm_file;
|
||
|
struct snd_pcm_substream *substream;
|
||
|
struct snd_pcm_runtime *runtime;
|
||
|
snd_pcm_sframes_t result;
|
||
|
|
||
|
pcm_file = file->private_data;
|
||
|
substream = pcm_file->substream;
|
||
|
if (PCM_RUNTIME_CHECK(substream))
|
||
|
return -ENXIO;
|
||
|
runtime = substream->runtime;
|
||
|
if (runtime->state == SNDRV_PCM_STATE_OPEN ||
|
||
|
runtime->state == SNDRV_PCM_STATE_DISCONNECTED)
|
||
|
return -EBADFD;
|
||
|
if (!frame_aligned(runtime, count))
|
||
|
return -EINVAL;
|
||
|
count = bytes_to_frames(runtime, count);
|
||
|
result = snd_pcm_lib_read(substream, buf, count);
|
||
|
if (result > 0)
|
||
|
result = frames_to_bytes(runtime, result);
|
||
|
return result;
|
||
|
}
|
||
|
|
||
|
static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
|
||
|
size_t count, loff_t * offset)
|
||
|
{
|
||
|
struct snd_pcm_file *pcm_file;
|
||
|
struct snd_pcm_substream *substream;
|
||
|
struct snd_pcm_runtime *runtime;
|
||
|
snd_pcm_sframes_t result;
|
||
|
|
||
|
pcm_file = file->private_data;
|
||
|
substream = pcm_file->substream;
|
||
|
if (PCM_RUNTIME_CHECK(substream))
|
||
|
return -ENXIO;
|
||
|
runtime = substream->runtime;
|
||
|
if (runtime->state == SNDRV_PCM_STATE_OPEN ||
|
||
|
runtime->state == SNDRV_PCM_STATE_DISCONNECTED)
|
||
|
return -EBADFD;
|
||
|
if (!frame_aligned(runtime, count))
|
||
|
return -EINVAL;
|
||
|
count = bytes_to_frames(runtime, count);
|
||
|
result = snd_pcm_lib_write(substream, buf, count);
|
||
|
if (result > 0)
|
||
|
result = frames_to_bytes(runtime, result);
|
||
|
return result;
|
||
|
}
|
||
|
|
||
|
static ssize_t snd_pcm_readv(struct kiocb *iocb, struct iov_iter *to)
|
||
|
{
|
||
|
struct snd_pcm_file *pcm_file;
|
||
|
struct snd_pcm_substream *substream;
|
||
|
struct snd_pcm_runtime *runtime;
|
||
|
snd_pcm_sframes_t result;
|
||
|
unsigned long i;
|
||
|
void __user **bufs;
|
||
|
snd_pcm_uframes_t frames;
|
||
|
|
||
|
pcm_file = iocb->ki_filp->private_data;
|
||
|
substream = pcm_file->substream;
|
||
|
if (PCM_RUNTIME_CHECK(substream))
|
||
|
return -ENXIO;
|
||
|
runtime = substream->runtime;
|
||
|
if (runtime->state == SNDRV_PCM_STATE_OPEN ||
|
||
|
runtime->state == SNDRV_PCM_STATE_DISCONNECTED)
|
||
|
return -EBADFD;
|
||
|
if (!iter_is_iovec(to))
|
||
|
return -EINVAL;
|
||
|
if (to->nr_segs > 1024 || to->nr_segs != runtime->channels)
|
||
|
return -EINVAL;
|
||
|
if (!frame_aligned(runtime, to->iov->iov_len))
|
||
|
return -EINVAL;
|
||
|
frames = bytes_to_samples(runtime, to->iov->iov_len);
|
||
|
bufs = kmalloc_array(to->nr_segs, sizeof(void *), GFP_KERNEL);
|
||
|
if (bufs == NULL)
|
||
|
return -ENOMEM;
|
||
|
for (i = 0; i < to->nr_segs; ++i)
|
||
|
bufs[i] = to->iov[i].iov_base;
|
||
|
result = snd_pcm_lib_readv(substream, bufs, frames);
|
||
|
if (result > 0)
|
||
|
result = frames_to_bytes(runtime, result);
|
||
|
kfree(bufs);
|
||
|
return result;
|
||
|
}
|
||
|
|
||
|
static ssize_t snd_pcm_writev(struct kiocb *iocb, struct iov_iter *from)
|
||
|
{
|
||
|
struct snd_pcm_file *pcm_file;
|
||
|
struct snd_pcm_substream *substream;
|
||
|
struct snd_pcm_runtime *runtime;
|
||
|
snd_pcm_sframes_t result;
|
||
|
unsigned long i;
|
||
|
void __user **bufs;
|
||
|
snd_pcm_uframes_t frames;
|
||
|
|
||
|
pcm_file = iocb->ki_filp->private_data;
|
||
|
substream = pcm_file->substream;
|
||
|
if (PCM_RUNTIME_CHECK(substream))
|
||
|
return -ENXIO;
|
||
|
runtime = substream->runtime;
|
||
|
if (runtime->state == SNDRV_PCM_STATE_OPEN ||
|
||
|
runtime->state == SNDRV_PCM_STATE_DISCONNECTED)
|
||
|
return -EBADFD;
|
||
|
if (!iter_is_iovec(from))
|
||
|
return -EINVAL;
|
||
|
if (from->nr_segs > 128 || from->nr_segs != runtime->channels ||
|
||
|
!frame_aligned(runtime, from->iov->iov_len))
|
||
|
return -EINVAL;
|
||
|
frames = bytes_to_samples(runtime, from->iov->iov_len);
|
||
|
bufs = kmalloc_array(from->nr_segs, sizeof(void *), GFP_KERNEL);
|
||
|
if (bufs == NULL)
|
||
|
return -ENOMEM;
|
||
|
for (i = 0; i < from->nr_segs; ++i)
|
||
|
bufs[i] = from->iov[i].iov_base;
|
||
|
result = snd_pcm_lib_writev(substream, bufs, frames);
|
||
|
if (result > 0)
|
||
|
result = frames_to_bytes(runtime, result);
|
||
|
kfree(bufs);
|
||
|
return result;
|
||
|
}
|
||
|
|
||
|
static __poll_t snd_pcm_poll(struct file *file, poll_table *wait)
|
||
|
{
|
||
|
struct snd_pcm_file *pcm_file;
|
||
|
struct snd_pcm_substream *substream;
|
||
|
struct snd_pcm_runtime *runtime;
|
||
|
__poll_t mask, ok;
|
||
|
snd_pcm_uframes_t avail;
|
||
|
|
||
|
pcm_file = file->private_data;
|
||
|
|
||
|
substream = pcm_file->substream;
|
||
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
|
||
|
ok = EPOLLOUT | EPOLLWRNORM;
|
||
|
else
|
||
|
ok = EPOLLIN | EPOLLRDNORM;
|
||
|
if (PCM_RUNTIME_CHECK(substream))
|
||
|
return ok | EPOLLERR;
|
||
|
|
||
|
runtime = substream->runtime;
|
||
|
if (runtime->state == SNDRV_PCM_STATE_DISCONNECTED)
|
||
|
return ok | EPOLLERR;
|
||
|
|
||
|
poll_wait(file, &runtime->sleep, wait);
|
||
|
|
||
|
mask = 0;
|
||
|
snd_pcm_stream_lock_irq(substream);
|
||
|
avail = snd_pcm_avail(substream);
|
||
|
switch (runtime->state) {
|
||
|
case SNDRV_PCM_STATE_RUNNING:
|
||
|
case SNDRV_PCM_STATE_PREPARED:
|
||
|
case SNDRV_PCM_STATE_PAUSED:
|
||
|
if (avail >= runtime->control->avail_min)
|
||
|
mask = ok;
|
||
|
break;
|
||
|
case SNDRV_PCM_STATE_DRAINING:
|
||
|
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
|
||
|
mask = ok;
|
||
|
if (!avail)
|
||
|
mask |= EPOLLERR;
|
||
|
}
|
||
|
break;
|
||
|
default:
|
||
|
mask = ok | EPOLLERR;
|
||
|
break;
|
||
|
}
|
||
|
snd_pcm_stream_unlock_irq(substream);
|
||
|
return mask;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* mmap support
|
||
|
*/
|
||
|
|
||
|
/*
|
||
|
* Only on coherent architectures, we can mmap the status and the control records
|
||
|
* for effcient data transfer. On others, we have to use HWSYNC ioctl...
|
||
|
*/
|
||
|
#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
|
||
|
/*
|
||
|
* mmap status record
|
||
|
*/
|
||
|
static vm_fault_t snd_pcm_mmap_status_fault(struct vm_fault *vmf)
|
||
|
{
|
||
|
struct snd_pcm_substream *substream = vmf->vma->vm_private_data;
|
||
|
struct snd_pcm_runtime *runtime;
|
||
|
|
||
|
if (substream == NULL)
|
||
|
return VM_FAULT_SIGBUS;
|
||
|
runtime = substream->runtime;
|
||
|
vmf->page = virt_to_page(runtime->status);
|
||
|
get_page(vmf->page);
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static const struct vm_operations_struct snd_pcm_vm_ops_status =
|
||
|
{
|
||
|
.fault = snd_pcm_mmap_status_fault,
|
||
|
};
|
||
|
|
||
|
static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
|
||
|
struct vm_area_struct *area)
|
||
|
{
|
||
|
long size;
|
||
|
if (!(area->vm_flags & VM_READ))
|
||
|
return -EINVAL;
|
||
|
size = area->vm_end - area->vm_start;
|
||
|
if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
|
||
|
return -EINVAL;
|
||
|
area->vm_ops = &snd_pcm_vm_ops_status;
|
||
|
area->vm_private_data = substream;
|
||
|
area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
|
||
|
area->vm_flags &= ~(VM_WRITE | VM_MAYWRITE);
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* mmap control record
|
||
|
*/
|
||
|
static vm_fault_t snd_pcm_mmap_control_fault(struct vm_fault *vmf)
|
||
|
{
|
||
|
struct snd_pcm_substream *substream = vmf->vma->vm_private_data;
|
||
|
struct snd_pcm_runtime *runtime;
|
||
|
|
||
|
if (substream == NULL)
|
||
|
return VM_FAULT_SIGBUS;
|
||
|
runtime = substream->runtime;
|
||
|
vmf->page = virt_to_page(runtime->control);
|
||
|
get_page(vmf->page);
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static const struct vm_operations_struct snd_pcm_vm_ops_control =
|
||
|
{
|
||
|
.fault = snd_pcm_mmap_control_fault,
|
||
|
};
|
||
|
|
||
|
static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
|
||
|
struct vm_area_struct *area)
|
||
|
{
|
||
|
long size;
|
||
|
if (!(area->vm_flags & VM_READ))
|
||
|
return -EINVAL;
|
||
|
size = area->vm_end - area->vm_start;
|
||
|
if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
|
||
|
return -EINVAL;
|
||
|
area->vm_ops = &snd_pcm_vm_ops_control;
|
||
|
area->vm_private_data = substream;
|
||
|
area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static bool pcm_status_mmap_allowed(struct snd_pcm_file *pcm_file)
|
||
|
{
|
||
|
/* If drivers require the explicit sync (typically for non-coherent
|
||
|
* pages), we have to disable the mmap of status and control data
|
||
|
* to enforce the control via SYNC_PTR ioctl.
|
||
|
*/
|
||
|
if (pcm_file->substream->runtime->hw.info & SNDRV_PCM_INFO_EXPLICIT_SYNC)
|
||
|
return false;
|
||
|
/* See pcm_control_mmap_allowed() below.
|
||
|
* Since older alsa-lib requires both status and control mmaps to be
|
||
|
* coupled, we have to disable the status mmap for old alsa-lib, too.
|
||
|
*/
|
||
|
if (pcm_file->user_pversion < SNDRV_PROTOCOL_VERSION(2, 0, 14) &&
|
||
|
(pcm_file->substream->runtime->hw.info & SNDRV_PCM_INFO_SYNC_APPLPTR))
|
||
|
return false;
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
static bool pcm_control_mmap_allowed(struct snd_pcm_file *pcm_file)
|
||
|
{
|
||
|
if (pcm_file->no_compat_mmap)
|
||
|
return false;
|
||
|
/* see above */
|
||
|
if (pcm_file->substream->runtime->hw.info & SNDRV_PCM_INFO_EXPLICIT_SYNC)
|
||
|
return false;
|
||
|
/* Disallow the control mmap when SYNC_APPLPTR flag is set;
|
||
|
* it enforces the user-space to fall back to snd_pcm_sync_ptr(),
|
||
|
* thus it effectively assures the manual update of appl_ptr.
|
||
|
*/
|
||
|
if (pcm_file->substream->runtime->hw.info & SNDRV_PCM_INFO_SYNC_APPLPTR)
|
||
|
return false;
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
#else /* ! coherent mmap */
|
||
|
/*
|
||
|
* don't support mmap for status and control records.
|
||
|
*/
|
||
|
#define pcm_status_mmap_allowed(pcm_file) false
|
||
|
#define pcm_control_mmap_allowed(pcm_file) false
|
||
|
|
||
|
static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
|
||
|
struct vm_area_struct *area)
|
||
|
{
|
||
|
return -ENXIO;
|
||
|
}
|
||
|
static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
|
||
|
struct vm_area_struct *area)
|
||
|
{
|
||
|
return -ENXIO;
|
||
|
}
|
||
|
#endif /* coherent mmap */
|
||
|
|
||
|
/*
|
||
|
* fault callback for mmapping a RAM page
|
||
|
*/
|
||
|
static vm_fault_t snd_pcm_mmap_data_fault(struct vm_fault *vmf)
|
||
|
{
|
||
|
struct snd_pcm_substream *substream = vmf->vma->vm_private_data;
|
||
|
struct snd_pcm_runtime *runtime;
|
||
|
unsigned long offset;
|
||
|
struct page * page;
|
||
|
size_t dma_bytes;
|
||
|
|
||
|
if (substream == NULL)
|
||
|
return VM_FAULT_SIGBUS;
|
||
|
runtime = substream->runtime;
|
||
|
offset = vmf->pgoff << PAGE_SHIFT;
|
||
|
dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
|
||
|
if (offset > dma_bytes - PAGE_SIZE)
|
||
|
return VM_FAULT_SIGBUS;
|
||
|
if (substream->ops->page)
|
||
|
page = substream->ops->page(substream, offset);
|
||
|
else if (!snd_pcm_get_dma_buf(substream))
|
||
|
page = virt_to_page(runtime->dma_area + offset);
|
||
|
else
|
||
|
page = snd_sgbuf_get_page(snd_pcm_get_dma_buf(substream), offset);
|
||
|
if (!page)
|
||
|
return VM_FAULT_SIGBUS;
|
||
|
get_page(page);
|
||
|
vmf->page = page;
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static const struct vm_operations_struct snd_pcm_vm_ops_data = {
|
||
|
.open = snd_pcm_mmap_data_open,
|
||
|
.close = snd_pcm_mmap_data_close,
|
||
|
};
|
||
|
|
||
|
static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
|
||
|
.open = snd_pcm_mmap_data_open,
|
||
|
.close = snd_pcm_mmap_data_close,
|
||
|
.fault = snd_pcm_mmap_data_fault,
|
||
|
};
|
||
|
|
||
|
/*
|
||
|
* mmap the DMA buffer on RAM
|
||
|
*/
|
||
|
|
||
|
/**
|
||
|
* snd_pcm_lib_default_mmap - Default PCM data mmap function
|
||
|
* @substream: PCM substream
|
||
|
* @area: VMA
|
||
|
*
|
||
|
* This is the default mmap handler for PCM data. When mmap pcm_ops is NULL,
|
||
|
* this function is invoked implicitly.
|
||
|
*
|
||
|
* Return: zero if successful, or a negative error code
|
||
|
*/
|
||
|
int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
|
||
|
struct vm_area_struct *area)
|
||
|
{
|
||
|
area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
|
||
|
if (!substream->ops->page &&
|
||
|
!snd_dma_buffer_mmap(snd_pcm_get_dma_buf(substream), area))
|
||
|
return 0;
|
||
|
/* mmap with fault handler */
|
||
|
area->vm_ops = &snd_pcm_vm_ops_data_fault;
|
||
|
return 0;
|
||
|
}
|
||
|
EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap);
|
||
|
|
||
|
/*
|
||
|
* mmap the DMA buffer on I/O memory area
|
||
|
*/
|
||
|
#if SNDRV_PCM_INFO_MMAP_IOMEM
|
||
|
/**
|
||
|
* snd_pcm_lib_mmap_iomem - Default PCM data mmap function for I/O mem
|
||
|
* @substream: PCM substream
|
||
|
* @area: VMA
|
||
|
*
|
||
|
* When your hardware uses the iomapped pages as the hardware buffer and
|
||
|
* wants to mmap it, pass this function as mmap pcm_ops. Note that this
|
||
|
* is supposed to work only on limited architectures.
|
||
|
*
|
||
|
* Return: zero if successful, or a negative error code
|
||
|
*/
|
||
|
int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
|
||
|
struct vm_area_struct *area)
|
||
|
{
|
||
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
||
|
|
||
|
area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
|
||
|
return vm_iomap_memory(area, runtime->dma_addr, runtime->dma_bytes);
|
||
|
}
|
||
|
EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
|
||
|
#endif /* SNDRV_PCM_INFO_MMAP */
|
||
|
|
||
|
/*
|
||
|
* mmap DMA buffer
|
||
|
*/
|
||
|
int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
|
||
|
struct vm_area_struct *area)
|
||
|
{
|
||
|
struct snd_pcm_runtime *runtime;
|
||
|
long size;
|
||
|
unsigned long offset;
|
||
|
size_t dma_bytes;
|
||
|
int err;
|
||
|
|
||
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
|
||
|
if (!(area->vm_flags & (VM_WRITE|VM_READ)))
|
||
|
return -EINVAL;
|
||
|
} else {
|
||
|
if (!(area->vm_flags & VM_READ))
|
||
|
return -EINVAL;
|
||
|
}
|
||
|
runtime = substream->runtime;
|
||
|
if (runtime->state == SNDRV_PCM_STATE_OPEN)
|
||
|
return -EBADFD;
|
||
|
if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
|
||
|
return -ENXIO;
|
||
|
if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
|
||
|
runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
|
||
|
return -EINVAL;
|
||
|
size = area->vm_end - area->vm_start;
|
||
|
offset = area->vm_pgoff << PAGE_SHIFT;
|
||
|
dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
|
||
|
if ((size_t)size > dma_bytes)
|
||
|
return -EINVAL;
|
||
|
if (offset > dma_bytes - size)
|
||
|
return -EINVAL;
|
||
|
|
||
|
area->vm_ops = &snd_pcm_vm_ops_data;
|
||
|
area->vm_private_data = substream;
|
||
|
if (substream->ops->mmap)
|
||
|
err = substream->ops->mmap(substream, area);
|
||
|
else
|
||
|
err = snd_pcm_lib_default_mmap(substream, area);
|
||
|
if (!err)
|
||
|
atomic_inc(&substream->mmap_count);
|
||
|
return err;
|
||
|
}
|
||
|
EXPORT_SYMBOL(snd_pcm_mmap_data);
|
||
|
|
||
|
static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
|
||
|
{
|
||
|
struct snd_pcm_file * pcm_file;
|
||
|
struct snd_pcm_substream *substream;
|
||
|
unsigned long offset;
|
||
|
|
||
|
pcm_file = file->private_data;
|
||
|
substream = pcm_file->substream;
|
||
|
if (PCM_RUNTIME_CHECK(substream))
|
||
|
return -ENXIO;
|
||
|
if (substream->runtime->state == SNDRV_PCM_STATE_DISCONNECTED)
|
||
|
return -EBADFD;
|
||
|
|
||
|
offset = area->vm_pgoff << PAGE_SHIFT;
|
||
|
switch (offset) {
|
||
|
case SNDRV_PCM_MMAP_OFFSET_STATUS_OLD:
|
||
|
if (pcm_file->no_compat_mmap || !IS_ENABLED(CONFIG_64BIT))
|
||
|
return -ENXIO;
|
||
|
fallthrough;
|
||
|
case SNDRV_PCM_MMAP_OFFSET_STATUS_NEW:
|
||
|
if (!pcm_status_mmap_allowed(pcm_file))
|
||
|
return -ENXIO;
|
||
|
return snd_pcm_mmap_status(substream, file, area);
|
||
|
case SNDRV_PCM_MMAP_OFFSET_CONTROL_OLD:
|
||
|
if (pcm_file->no_compat_mmap || !IS_ENABLED(CONFIG_64BIT))
|
||
|
return -ENXIO;
|
||
|
fallthrough;
|
||
|
case SNDRV_PCM_MMAP_OFFSET_CONTROL_NEW:
|
||
|
if (!pcm_control_mmap_allowed(pcm_file))
|
||
|
return -ENXIO;
|
||
|
return snd_pcm_mmap_control(substream, file, area);
|
||
|
default:
|
||
|
return snd_pcm_mmap_data(substream, file, area);
|
||
|
}
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int snd_pcm_fasync(int fd, struct file * file, int on)
|
||
|
{
|
||
|
struct snd_pcm_file * pcm_file;
|
||
|
struct snd_pcm_substream *substream;
|
||
|
struct snd_pcm_runtime *runtime;
|
||
|
|
||
|
pcm_file = file->private_data;
|
||
|
substream = pcm_file->substream;
|
||
|
if (PCM_RUNTIME_CHECK(substream))
|
||
|
return -ENXIO;
|
||
|
runtime = substream->runtime;
|
||
|
if (runtime->state == SNDRV_PCM_STATE_DISCONNECTED)
|
||
|
return -EBADFD;
|
||
|
return snd_fasync_helper(fd, file, on, &runtime->fasync);
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* ioctl32 compat
|
||
|
*/
|
||
|
#ifdef CONFIG_COMPAT
|
||
|
#include "pcm_compat.c"
|
||
|
#else
|
||
|
#define snd_pcm_ioctl_compat NULL
|
||
|
#endif
|
||
|
|
||
|
/*
|
||
|
* To be removed helpers to keep binary compatibility
|
||
|
*/
|
||
|
|
||
|
#ifdef CONFIG_SND_SUPPORT_OLD_API
|
||
|
#define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
|
||
|
#define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
|
||
|
|
||
|
static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
|
||
|
struct snd_pcm_hw_params_old *oparams)
|
||
|
{
|
||
|
unsigned int i;
|
||
|
|
||
|
memset(params, 0, sizeof(*params));
|
||
|
params->flags = oparams->flags;
|
||
|
for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
|
||
|
params->masks[i].bits[0] = oparams->masks[i];
|
||
|
memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
|
||
|
params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
|
||
|
params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
|
||
|
params->info = oparams->info;
|
||
|
params->msbits = oparams->msbits;
|
||
|
params->rate_num = oparams->rate_num;
|
||
|
params->rate_den = oparams->rate_den;
|
||
|
params->fifo_size = oparams->fifo_size;
|
||
|
}
|
||
|
|
||
|
static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
|
||
|
struct snd_pcm_hw_params *params)
|
||
|
{
|
||
|
unsigned int i;
|
||
|
|
||
|
memset(oparams, 0, sizeof(*oparams));
|
||
|
oparams->flags = params->flags;
|
||
|
for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
|
||
|
oparams->masks[i] = params->masks[i].bits[0];
|
||
|
memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
|
||
|
oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
|
||
|
oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
|
||
|
oparams->info = params->info;
|
||
|
oparams->msbits = params->msbits;
|
||
|
oparams->rate_num = params->rate_num;
|
||
|
oparams->rate_den = params->rate_den;
|
||
|
oparams->fifo_size = params->fifo_size;
|
||
|
}
|
||
|
|
||
|
static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
|
||
|
struct snd_pcm_hw_params_old __user * _oparams)
|
||
|
{
|
||
|
struct snd_pcm_hw_params *params;
|
||
|
struct snd_pcm_hw_params_old *oparams = NULL;
|
||
|
int err;
|
||
|
|
||
|
params = kmalloc(sizeof(*params), GFP_KERNEL);
|
||
|
if (!params)
|
||
|
return -ENOMEM;
|
||
|
|
||
|
oparams = memdup_user(_oparams, sizeof(*oparams));
|
||
|
if (IS_ERR(oparams)) {
|
||
|
err = PTR_ERR(oparams);
|
||
|
goto out;
|
||
|
}
|
||
|
snd_pcm_hw_convert_from_old_params(params, oparams);
|
||
|
err = snd_pcm_hw_refine(substream, params);
|
||
|
if (err < 0)
|
||
|
goto out_old;
|
||
|
|
||
|
err = fixup_unreferenced_params(substream, params);
|
||
|
if (err < 0)
|
||
|
goto out_old;
|
||
|
|
||
|
snd_pcm_hw_convert_to_old_params(oparams, params);
|
||
|
if (copy_to_user(_oparams, oparams, sizeof(*oparams)))
|
||
|
err = -EFAULT;
|
||
|
out_old:
|
||
|
kfree(oparams);
|
||
|
out:
|
||
|
kfree(params);
|
||
|
return err;
|
||
|
}
|
||
|
|
||
|
static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
|
||
|
struct snd_pcm_hw_params_old __user * _oparams)
|
||
|
{
|
||
|
struct snd_pcm_hw_params *params;
|
||
|
struct snd_pcm_hw_params_old *oparams = NULL;
|
||
|
int err;
|
||
|
|
||
|
params = kmalloc(sizeof(*params), GFP_KERNEL);
|
||
|
if (!params)
|
||
|
return -ENOMEM;
|
||
|
|
||
|
oparams = memdup_user(_oparams, sizeof(*oparams));
|
||
|
if (IS_ERR(oparams)) {
|
||
|
err = PTR_ERR(oparams);
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
snd_pcm_hw_convert_from_old_params(params, oparams);
|
||
|
err = snd_pcm_hw_params(substream, params);
|
||
|
if (err < 0)
|
||
|
goto out_old;
|
||
|
|
||
|
snd_pcm_hw_convert_to_old_params(oparams, params);
|
||
|
if (copy_to_user(_oparams, oparams, sizeof(*oparams)))
|
||
|
err = -EFAULT;
|
||
|
out_old:
|
||
|
kfree(oparams);
|
||
|
out:
|
||
|
kfree(params);
|
||
|
return err;
|
||
|
}
|
||
|
#endif /* CONFIG_SND_SUPPORT_OLD_API */
|
||
|
|
||
|
#ifndef CONFIG_MMU
|
||
|
static unsigned long snd_pcm_get_unmapped_area(struct file *file,
|
||
|
unsigned long addr,
|
||
|
unsigned long len,
|
||
|
unsigned long pgoff,
|
||
|
unsigned long flags)
|
||
|
{
|
||
|
struct snd_pcm_file *pcm_file = file->private_data;
|
||
|
struct snd_pcm_substream *substream = pcm_file->substream;
|
||
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
||
|
unsigned long offset = pgoff << PAGE_SHIFT;
|
||
|
|
||
|
switch (offset) {
|
||
|
case SNDRV_PCM_MMAP_OFFSET_STATUS_NEW:
|
||
|
return (unsigned long)runtime->status;
|
||
|
case SNDRV_PCM_MMAP_OFFSET_CONTROL_NEW:
|
||
|
return (unsigned long)runtime->control;
|
||
|
default:
|
||
|
return (unsigned long)runtime->dma_area + offset;
|
||
|
}
|
||
|
}
|
||
|
#else
|
||
|
# define snd_pcm_get_unmapped_area NULL
|
||
|
#endif
|
||
|
|
||
|
/*
|
||
|
* Register section
|
||
|
*/
|
||
|
|
||
|
const struct file_operations snd_pcm_f_ops[2] = {
|
||
|
{
|
||
|
.owner = THIS_MODULE,
|
||
|
.write = snd_pcm_write,
|
||
|
.write_iter = snd_pcm_writev,
|
||
|
.open = snd_pcm_playback_open,
|
||
|
.release = snd_pcm_release,
|
||
|
.llseek = no_llseek,
|
||
|
.poll = snd_pcm_poll,
|
||
|
.unlocked_ioctl = snd_pcm_ioctl,
|
||
|
.compat_ioctl = snd_pcm_ioctl_compat,
|
||
|
.mmap = snd_pcm_mmap,
|
||
|
.fasync = snd_pcm_fasync,
|
||
|
.get_unmapped_area = snd_pcm_get_unmapped_area,
|
||
|
},
|
||
|
{
|
||
|
.owner = THIS_MODULE,
|
||
|
.read = snd_pcm_read,
|
||
|
.read_iter = snd_pcm_readv,
|
||
|
.open = snd_pcm_capture_open,
|
||
|
.release = snd_pcm_release,
|
||
|
.llseek = no_llseek,
|
||
|
.poll = snd_pcm_poll,
|
||
|
.unlocked_ioctl = snd_pcm_ioctl,
|
||
|
.compat_ioctl = snd_pcm_ioctl_compat,
|
||
|
.mmap = snd_pcm_mmap,
|
||
|
.fasync = snd_pcm_fasync,
|
||
|
.get_unmapped_area = snd_pcm_get_unmapped_area,
|
||
|
}
|
||
|
};
|