Release 4.13 sound/core/pcm_native.c

Directory: sound/core
/*
 *  Digital Audio (PCM) abstract layer
 *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
 *
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 */

#include <linux/mm.h>
#include <linux/module.h>
#include <linux/file.h>
#include <linux/slab.h>
#include <linux/sched/signal.h>
#include <linux/time.h>
#include <linux/pm_qos.h>
#include <linux/io.h>
#include <linux/dma-mapping.h>
#include <sound/core.h>
#include <sound/control.h>
#include <sound/info.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/timer.h>
#include <sound/minors.h>
#include <linux/uio.h>

#include "pcm_local.h"

#ifdef CONFIG_SND_DEBUG

#define CREATE_TRACE_POINTS
#include "pcm_param_trace.h"
#else

#define trace_hw_mask_param_enabled()		0

#define trace_hw_interval_param_enabled()	0

#define trace_hw_mask_param(substream, type, index, prev, curr)

#define trace_hw_interval_param(substream, type, index, prev, curr)
#endif

/*
 *  Compatibility
 */


struct snd_pcm_hw_params_old {
	
unsigned int flags;
	
unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
			   SNDRV_PCM_HW_PARAM_ACCESS + 1];
	
struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
					SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
	
unsigned int rmask;
	
unsigned int cmask;
	
unsigned int info;
	
unsigned int msbits;
	
unsigned int rate_num;
	
unsigned int rate_den;
	
snd_pcm_uframes_t fifo_size;
	
unsigned char reserved[64];
};

#ifdef CONFIG_SND_SUPPORT_OLD_API

#define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)

#define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)

static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
				      struct snd_pcm_hw_params_old __user * _oparams);
static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
				      struct snd_pcm_hw_params_old __user * _oparams);
#endif
static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);

/*
 *
 */

static DEFINE_RWLOCK(snd_pcm_link_rwlock);
static DECLARE_RWSEM(snd_pcm_link_rwsem);

/* Writer in rwsem may block readers even during its waiting in queue,
 * and this may lead to a deadlock when the code path takes read sem
 * twice (e.g. one in snd_pcm_action_nonatomic() and another in
 * snd_pcm_stream_lock()).  As a (suboptimal) workaround, let writer to
 * spin until it gets the lock.
 */


static inline void down_write_nonblock(struct rw_semaphore *lock)
{
	while (!down_write_trylock(lock))
		cond_resched();
}

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/**
 * snd_pcm_stream_lock - Lock the PCM stream
 * @substream: PCM substream
 *
 * This locks the PCM stream's spinlock or mutex depending on the nonatomic
 * flag of the given substream.  This also takes the global link rw lock
 * (or rw sem), too, for avoiding the race with linked streams.
 */


void snd_pcm_stream_lock(struct snd_pcm_substream *substream)
{
	if (substream->pcm->nonatomic) {
		down_read_nested(&snd_pcm_link_rwsem, SINGLE_DEPTH_NESTING);
		mutex_lock(&substream->self_group.mutex);
	} else {
		read_lock(&snd_pcm_link_rwlock);
		spin_lock(&substream->self_group.lock);
	}
}
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EXPORT_SYMBOL_GPL(snd_pcm_stream_lock);

/**
 * snd_pcm_stream_lock - Unlock the PCM stream
 * @substream: PCM substream
 *
 * This unlocks the PCM stream that has been locked via snd_pcm_stream_lock().
 */


void snd_pcm_stream_unlock(struct snd_pcm_substream *substream)
{
	if (substream->pcm->nonatomic) {
		mutex_unlock(&substream->self_group.mutex);
		up_read(&snd_pcm_link_rwsem);
	} else {
		spin_unlock(&substream->self_group.lock);
		read_unlock(&snd_pcm_link_rwlock);
	}
}
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Takashi Iwai 51 92.73% 1 50.00%
Jaroslav Kysela 4 7.27% 1 50.00%
Total 55 100.00% 2 100.00%


EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock);

/**
 * snd_pcm_stream_lock_irq - Lock the PCM stream
 * @substream: PCM substream
 *
 * This locks the PCM stream like snd_pcm_stream_lock() and disables the local
 * IRQ (only when nonatomic is false).  In nonatomic case, this is identical
 * as snd_pcm_stream_lock().
 */


void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream)
{
	if (!substream->pcm->nonatomic)
		local_irq_disable();
	snd_pcm_stream_lock(substream);
}
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EXPORT_SYMBOL_GPL(snd_pcm_stream_lock_irq);

/**
 * snd_pcm_stream_unlock_irq - Unlock the PCM stream
 * @substream: PCM substream
 *
 * This is a counter-part of snd_pcm_stream_lock_irq().
 */


void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream)
{
	snd_pcm_stream_unlock(substream);
	if (!substream->pcm->nonatomic)
		local_irq_enable();
}
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EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irq);



unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream)
{
	unsigned long flags = 0;
	if (!substream->pcm->nonatomic)
		local_irq_save(flags);
	snd_pcm_stream_lock(substream);
	return flags;
}
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EXPORT_SYMBOL_GPL(_snd_pcm_stream_lock_irqsave);

/**
 * snd_pcm_stream_unlock_irqrestore - Unlock the PCM stream
 * @substream: PCM substream
 * @flags: irq flags
 *
 * This is a counter-part of snd_pcm_stream_lock_irqsave().
 */


void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream,
				      unsigned long flags)
{
	snd_pcm_stream_unlock(substream);
	if (!substream->pcm->nonatomic)
		local_irq_restore(flags);
}
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EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irqrestore);



int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
{
	struct snd_pcm_runtime *runtime;
	struct snd_pcm *pcm = substream->pcm;
	struct snd_pcm_str *pstr = substream->pstr;

	memset(info, 0, sizeof(*info));
	info->card = pcm->card->number;
	info->device = pcm->device;
	info->stream = substream->stream;
	info->subdevice = substream->number;
	strlcpy(info->id, pcm->id, sizeof(info->id));
	strlcpy(info->name, pcm->name, sizeof(info->name));
	info->dev_class = pcm->dev_class;
	info->dev_subclass = pcm->dev_subclass;
	info->subdevices_count = pstr->substream_count;
	info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
	strlcpy(info->subname, substream->name, sizeof(info->subname));
	runtime = substream->runtime;

	return 0;
}

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Jaroslav Kysela 171 92.93% 1 33.33%
Takashi Iwai 10 5.43% 1 33.33%
Benjamin Collins 3 1.63% 1 33.33%
Total 184 100.00% 3 100.00%



int snd_pcm_info_user(struct snd_pcm_substream *substream,
		      struct snd_pcm_info __user * _info)
{
	struct snd_pcm_info *info;
	int err;

	info = kmalloc(sizeof(*info), GFP_KERNEL);
	if (! info)
		return -ENOMEM;
	err = snd_pcm_info(substream, info);
	if (err >= 0) {
		if (copy_to_user(_info, info, sizeof(*info)))
			err = -EFAULT;
	}
	kfree(info);
	return err;
}

Contributors
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Jaroslav Kysela 84 92.31% 2 50.00%
Takashi Iwai 6 6.59% 1 25.00%
Al Viro 1 1.10% 1 25.00%
Total 91 100.00% 4 100.00%



static bool hw_support_mmap(struct snd_pcm_substream *substream)
{
	if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_MMAP))
		return false;
	/* architecture supports dma_mmap_coherent()? */
#if defined(CONFIG_ARCH_NO_COHERENT_DMA_MMAP) || !defined(CONFIG_HAS_DMA)
	if (!substream->ops->mmap &&
	    substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
		return false;
#endif
	return true;
}

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static int constrain_mask_params(struct snd_pcm_substream *substream,
				 struct snd_pcm_hw_params *params)
{
	struct snd_pcm_hw_constraints *constrs =
					&substream->runtime->hw_constraints;
	struct snd_mask *m;
	unsigned int k;
	struct snd_mask old_mask;
	int changed;

	for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
		m = hw_param_mask(params, k);
		if (snd_mask_empty(m))
			return -EINVAL;

		/* This parameter is not requested to change by a caller. */
		if (!(params->rmask & (1 << k)))
			continue;

		if (trace_hw_mask_param_enabled())
			old_mask = *m;

		changed = snd_mask_refine(m, constrs_mask(constrs, k));
		if (changed < 0)
			return changed;
		if (changed == 0)
			continue;

		/* Set corresponding flag so that the caller gets it. */
		trace_hw_mask_param(substream, k, 0, &old_mask, m);
		params->cmask |= 1 << k;
	}

	return 0;
}

Contributors
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Jaroslav Kysela 112 69.14% 2 28.57%
Takashi Sakamoto 44 27.16% 4 57.14%
Takashi Iwai 6 3.70% 1 14.29%
Total 162 100.00% 7 100.00%



static int constrain_interval_params(struct snd_pcm_substream *substream,
				     struct snd_pcm_hw_params *params)
{
	struct snd_pcm_hw_constraints *constrs =
					&substream->runtime->hw_constraints;
	struct snd_interval *i;
	unsigned int k;
	struct snd_interval old_interval;
	int changed;

	for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
		i = hw_param_interval(params, k);
		if (snd_interval_empty(i))
			return -EINVAL;

		/* This parameter is not requested to change by a caller. */
		if (!(params->rmask & (1 << k)))
			continue;

		if (trace_hw_interval_param_enabled())
			old_interval = *i;

		changed = snd_interval_refine(i, constrs_interval(constrs, k));
		if (changed < 0)
			return changed;
		if (changed == 0)
			continue;

		/* Set corresponding flag so that the caller gets it. */
		trace_hw_interval_param(substream, k, 0, &old_interval, i);
		params->cmask |= 1 << k;
	}

	return 0;
}

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Jaroslav Kysela 90 55.56% 1 20.00%
Takashi Sakamoto 72 44.44% 4 80.00%
Total 162 100.00% 5 100.00%



static int constrain_params_by_rules(struct snd_pcm_substream *substream,
				     struct snd_pcm_hw_params *params)
{
	struct snd_pcm_hw_constraints *constrs =
					&substream->runtime->hw_constraints;
	unsigned int k;
	unsigned int rstamps[constrs->rules_num];
	unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
	unsigned int stamp;
	struct snd_pcm_hw_rule *r;
	unsigned int d;
	struct snd_mask old_mask;
	struct snd_interval old_interval;
	bool again;
	int changed;

	/*
         * Each application of rule has own sequence number.
         *
         * Each member of 'rstamps' array represents the sequence number of
         * recent application of corresponding rule.
         */
	for (k = 0; k < constrs->rules_num; k++)
		rstamps[k] = 0;

	/*
         * Each member of 'vstamps' array represents the sequence number of
         * recent application of rule in which corresponding parameters were
         * changed.
         *
         * In initial state, elements corresponding to parameters requested by
         * a caller is 1. For unrequested parameters, corresponding members
         * have 0 so that the parameters are never changed anymore.
         */
	for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
		vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;

	/* Due to the above design, actual sequence number starts at 2. */
	stamp = 2;
retry:
	/* Apply all rules in order. */
	again = false;
	for (k = 0; k < constrs->rules_num; k++) {
		r = &constrs->rules[k];

		/*
                 * Check condition bits of this rule. When the rule has
                 * 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))
			continue;

		/*
                 * The 'deps' array includes maximum three dependencies
                 * to SNDRV_PCM_HW_PARAM_XXXs for this rule. The fourth
                 * 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)
			return changed;

		/*
                 * 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 |= (1 << 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;

	return 0;
}

Contributors
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Jaroslav Kysela 303 67.48% 2 18.18%
Takashi Sakamoto 140 31.18% 8 72.73%
Takashi Iwai 6 1.34% 1 9.09%
Total 449 100.00% 11 100.00%



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 = substream->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;
}

Contributors
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Jaroslav Kysela 132 58.41% 3 37.50%
Takashi Sakamoto 91 40.27% 4 50.00%
Takashi Iwai 3 1.33% 1 12.50%
Total 226 100.00% 8 100.00%



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 & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
		params->msbits = 0;
	if (params->rmask & (1 << 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;
}
Contributors
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Takashi Sakamoto 127 92.70% 2 66.67%
Jaroslav Kysela 10 7.30% 1 33.33%
Total 137 100.00% 3 100.00%


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;
}

Contributors
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Jaroslav Kysela 72 61.54% 2 28.57%
Takashi Sakamoto 29 24.79% 2 28.57%
Li Zefan 9 7.69% 1 14.29%
Takashi Iwai 6 5.13% 1 14.29%
Al Viro 1 0.85% 1 14.29%
Total 117 100.00% 7 100.00%



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;
}

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static void snd_pcm_set_state(struct snd_pcm_substream *substream, int state)
{
	snd_pcm_stream_lock_irq(substream);
	if (substream->runtime->status->state != SNDRV_PCM_STATE_DISCONNECTED)
		substream->runtime->status->state = state;
	snd_pcm_stream_unlock_irq(substream);
}

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Total 46 100.00% 1 100.00%



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
}

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Total 42 100.00% 1 100.00%

/**
 * snd_pcm_hw_param_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 (snd_BUG_ON(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;
}

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Takashi Sakamoto 236 94.40% 3 50.00%
Jaroslav Kysela 9 3.60% 1 16.67%
Takashi Iwai 4 1.60% 1 16.67%
Adrian Bunk 1 0.40% 1 16.67%
Total 250 100.00% 6 100.00%



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;
	snd_pcm_stream_lock_irq(substream);
	switch (runtime->status->state) {
	case SNDRV_PCM_STATE_OPEN:
	case SNDRV_PCM_STATE_SETUP:
	case SNDRV_PCM_STATE_PREPARED:
		break;
	default:
		snd_pcm_stream_unlock_irq(substream);
		return -EBADFD;
	}
	snd_pcm_stream_unlock_irq(substream);
#if IS_ENABLED(CONFIG_SND_PCM_OSS)
	if (!substream->oss.oss)
#endif
		if (atomic_read(&substream->mmap_count))
			return -EBADFD;

	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->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;

	snd_pcm_timer_resolution_change(substream);
	snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP);

	if (pm_qos_request_active(&substream->latency_pm_qos_req))
		pm_qos_remove_request(&substream->latency_pm_qos_req);
	if ((usecs = period_to_usecs(runtime)) >= 0)
		pm_qos_add_request(&substream->latency_pm_qos_req,
				   PM_QOS_CPU_DMA_LATENCY, usecs);
	return 0;
 _error:
	/* 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);
	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 429 76.33% 3 18.75%
Takashi Iwai 53 9.43% 6 37.50%
Clemens Ladisch 43 7.65% 2 12.50%
Takashi Sakamoto 16 2.85% 1 6.25%
Mark Gross 10 1.78% 1 6.25%
James Bottomley 9 1.60% 1 6.25%
Adrian Bunk 1 0.18% 1 6.25%
Lucas De Marchi 1 0.18% 1 6.25%
Total 562 100.00% 16 100.00%



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;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 72 72.73% 2 33.33%
Takashi Sakamoto 11 11.11% 1 16.67%
Li Zefan 9 9.09% 1 16.67%
Takashi Iwai 6 6.06% 1 16.67%
Al Viro 1 1.01% 1 16.67%
Total 99 100.00% 6 100.00%



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;
	snd_pcm_stream_lock_irq(substream);
	switch (runtime->status->state) {
	case SNDRV_PCM_STATE_SETUP:
	case SNDRV_PCM_STATE_PREPARED:
		break;
	default:
		snd_pcm_stream_unlock_irq(substream);
		return -EBADFD;
	}
	snd_pcm_stream_unlock_irq(substream);
	if (atomic_read(&substream->mmap_count))
		return -EBADFD;
	if (substream->ops->hw_free)
		result = substream->ops->hw_free(substream);
	snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
	pm_qos_remove_request(&substream->latency_pm_qos_req);
	return result;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 99 78.57% 3 30.00%
Takashi Iwai 24 19.05% 5 50.00%
Mark Gross 2 1.59% 1 10.00%
James Bottomley 1 0.79% 1 10.00%
Total 126 100.00% 10 100.00%



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->status->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;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 258 78.90% 8 61.54%
Takashi Iwai 63 19.27% 4 30.77%
Dan Carpenter 6 1.83% 1 7.69%
Total 327 100.00% 13 100.00%



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(&params, _params, sizeof(params)))
		return -EFAULT;
	err = snd_pcm_sw_params(substream, &params);
	if (copy_to_user(_params, &params, sizeof(params)))
		return -EFAULT;
	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 68 90.67% 1 33.33%
Takashi Iwai 6 8.00% 1 33.33%
Al Viro 1 1.33% 1 33.33%
Total 75 100.00% 3 100.00%



int snd_pcm_status(struct snd_pcm_substream *substream,
		   struct snd_pcm_status *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->status->state;
	status->suspended_state = runtime->status->suspended_state;
	if (status->state == SNDRV_PCM_STATE_OPEN)
		goto _end;
	status->trigger_tstamp = runtime->trigger_tstamp;
	if (snd_pcm_running(substream)) {
		snd_pcm_update_hw_ptr(substream);
		if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
			status->tstamp = runtime->status->tstamp;
			status->driver_tstamp = runtime->driver_tstamp;
			status->audio_tstamp =
				runtime->status->audio_tstamp;
			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)
			snd_pcm_gettime(runtime, &status->tstamp);
	}
 _tstamp_end:
	status->appl_ptr = runtime->control->appl_ptr;
	status->hw_ptr = runtime->status->hw_ptr;
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		status->avail = snd_pcm_playback_avail(runtime);
		if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
		    runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
			status->delay = runtime->buffer_size - status->avail;
			status->delay += runtime->delay;
		} else
			status->delay = 0;
	} else {
		status->avail = snd_pcm_capture_avail(runtime);
		if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
			status->delay = status->avail + runtime->delay;
		else
			status->delay = 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;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 262 63.90% 5 50.00%
Pierre-Louis Bossart 128 31.22% 3 30.00%
Takashi Iwai 20 4.88% 2 20.00%
Total 410 100.00% 10 100.00%



static int snd_pcm_status_user(struct snd_pcm_substream *substream,
			       struct snd_pcm_status __user * _status,
			       bool ext)
{
	struct snd_pcm_status 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_status(substream, &status);
	if (res < 0)
		return res;
	if (copy_to_user(_status, &status, sizeof(status)))
		return -EFAULT;
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 71 65.14% 1 25.00%
Pierre-Louis Bossart 31 28.44% 1 25.00%
Takashi Iwai 6 5.50% 1 25.00%
Al Viro 1 0.92% 1 25.00%
Total 109 100.00% 4 100.00%



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->status->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 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 107 94.69% 3 75.00%
Takashi Iwai 6 5.31% 1 25.00%
Total 113 100.00% 4 100.00%



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;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 78 92.86% 2 66.67%
Takashi Iwai 6 7.14% 1 33.33%
Total 84 100.00% 3 100.00%



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;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 73 86.90% 3 60.00%
Pierre-Louis Bossart 7 8.33% 1 20.00%
Takashi Iwai 4 4.76% 1 20.00%
Total 84 100.00% 5 100.00%


struct action_ops {
	
int (*pre_action)(struct snd_pcm_substream *substream, int state);
	
int (*do_action)(struct snd_pcm_substream *substream, int state);
	
void (*undo_action)(struct snd_pcm_substream *substream, int state);
	
void (*post_action)(struct snd_pcm_substream *substream, int 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,
				int state, int do_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 (do_lock && s != substream) {
			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:
	if (do_lock) {
		/* unlock streams */
		snd_pcm_group_for_each_entry(s1, substream) {
			if (s1 != substream) {
				if (s1->pcm->nonatomic)
					mutex_unlock(&s1->self_group.mutex);
				else
					spin_unlock(&s1->self_group.lock);
			}
			if (s1 == s)	/* end */
				break;
		}
	}
	return res;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 198 73.88% 8 53.33%
Takashi Iwai 67 25.00% 5 33.33%
Frederik Deweerdt 2 0.75% 1 6.67%
Julia Lawall 1 0.37% 1 6.67%
Total 268 100.00% 15 100.00%

/*
 *  Note: call with stream lock
 */


static int snd_pcm_action_single(const struct action_ops *ops,
				 struct snd_pcm_substream *substream,
				 int 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;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 85 96.59% 2 50.00%
Takashi Iwai 2 2.27% 1 25.00%
Julia Lawall 1 1.14% 1 25.00%
Total 88 100.00% 4 100.00%

/*
 *  Note: call with stream lock
 */


static int snd_pcm_action(const struct action_ops *ops,
			  struct snd_pcm_substream *substream,
			  int state)
{
	int res;

	if (!snd_pcm_stream_linked(substream))
		return snd_pcm_action_single(ops, substream, state);

	if (substream->pcm->nonatomic) {
		if (!mutex_trylock(&substream->group->mutex)) {
			mutex_unlock(&substream->self_group.mutex);
			mutex_lock(&substream->group->mutex);
			mutex_lock(&substream->self_group.mutex);
		}
		res = snd_pcm_action_group(ops, substream, state, 1);
		mutex_unlock(&substream->group->mutex);
	} else {
		if (!spin_trylock(&substream->group->lock)) {
			spin_unlock(&substream->self_group.lock);
			spin_lock(&substream->group->lock);
			spin_lock(&substream->self_group.lock);
		}
		res = snd_pcm_action_group(ops, substream, state, 1);
		spin_unlock(&substream->group->lock);
	}
	return res;
}

Contributors
Person Tokens Prop Commits CommitProp
Takashi Iwai 119 61.66% 2 33.33%
Jaroslav Kysela 73 37.82% 3 50.00%
Julia Lawall 1 0.52% 1 16.67%
Total 193 100.00% 6 100.00%

/*
 *  Note: don't use any locks before
 */


static int snd_pcm_action_lock_irq(const struct action_ops *ops,
				   struct snd_pcm_substream *substream,
				   int state)
{
	int res;

	snd_pcm_stream_lock_irq(substream);
	res = snd_pcm_action(ops, substream, state);
	snd_pcm_stream_unlock_irq(substream);
	return res;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 41 87.23% 3 50.00%
Takashi Iwai 5 10.64% 2 33.33%
Julia Lawall 1 2.13% 1 16.67%
Total 47 100.00% 6 100.00%

/*
 */


static int snd_pcm_action_nonatomic(const struct action_ops *ops,
				    struct snd_pcm_substream *substream,
				    int state)
{
	int res;

	down_read(&snd_pcm_link_rwsem);
	if (snd_pcm_stream_linked(substream))
		res = snd_pcm_action_group(ops, substream, state, 0);
	else
		res = snd_pcm_action_single(ops, substream, state);
	up_read(&snd_pcm_link_rwsem);
	return res;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 67 95.71% 3 60.00%
Takashi Iwai 2 2.86% 1 20.00%
Julia Lawall 1 1.43% 1 20.00%
Total 70 100.00% 5 100.00%

/*
 * start callbacks
 */


static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	if (runtime->status->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;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 60 85.71% 1 33.33%
Pierre-Louis Bossart 6 8.57% 1 33.33%
Takashi Iwai 4 5.71% 1 33.33%
Total 70 100.00% 3 100.00%



static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
{
	if (substream->runtime->trigger_master != substream)
		return 0;
	return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 37 94.87% 1 50.00%
Takashi Iwai 2 5.13% 1 50.00%
Total 39 100.00% 2 100.00%



static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
{
	if (substream->runtime->trigger_master == substream)
		substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 33 94.29% 1 50.00%
Takashi Iwai 2 5.71% 1 50.00%
Total 35 100.00% 2 100.00%



static void snd_pcm_post_start(struct snd_pcm_substream *substream, int 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;
	runtime->status->state = 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);
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 75 87.21% 4 57.14%
Takashi Iwai 10 11.63% 2 28.57%
Jie Yang 1 1.16% 1 14.29%
Total 86 100.00% 7 100.00%


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);
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 19 90.48% 3 75.00%
Takashi Iwai 2 9.52% 1 25.00%
Total 21 100.00% 4 100.00%

/* 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);
}

Contributors
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Takashi Iwai 22 100.00% 1 100.00%
Total 22 100.00% 1 100.00%

/*
 * stop callbacks
 */


static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
		return -EBADFD;
	runtime->trigger_master = substream;
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 42 91.30% 3 75.00%
Takashi Iwai 4 8.70% 1 25.00%
Total 46 100.00% 4 100.00%



static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
{
	if (substream->runtime->trigger_master == substream &&
	    snd_pcm_running(substream))
		substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
	return 0; /* unconditonally stop all substreams */
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 42 95.45% 3 75.00%
Takashi Iwai 2 4.55% 1 25.00%
Total 44 100.00% 4 100.00%



static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	if (runtime->status->state != state) {
		snd_pcm_trigger_tstamp(substream);
		runtime->status->state = state;
		snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTOP);
	}
	wake_up(&runtime->sleep);
	wake_up(&runtime->tsleep);
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 58 81.69% 4 57.14%
Takashi Iwai 12 16.90% 2 28.57%
Jie Yang 1 1.41% 1 14.29%
Total 71 100.00% 7 100.00%


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);
}
Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 21 87.50% 2 50.00%
Takashi Iwai 2 8.33% 1 25.00%
Clemens Ladisch 1 4.17% 1 25.00%
Total 24 100.00% 4 100.00%


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 succesful, 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);
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 19 90.48% 2 66.67%
Takashi Iwai 2 9.52% 1 33.33%
Total 21 100.00% 3 100.00%

/**
 * 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;
	int ret = 0;

	snd_pcm_stream_lock_irqsave(substream, flags);
	if (snd_pcm_running(substream))
		ret = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
	snd_pcm_stream_unlock_irqrestore(substream, flags);
	return ret;
}
Contributors
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Takashi Iwai 52 100.00% 1 100.00%
Total 52 100.00% 1 100.00%


EXPORT_SYMBOL_GPL(snd_pcm_stop_xrun);

/*
 * pause callbacks
 */


static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
		return -ENOSYS;
	if (push) {
		if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
			return -EBADFD;
	} else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
		return -EBADFD;
	runtime->trigger_master = substream;
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 78 95.12% 2 66.67%
Takashi Iwai 4 4.88% 1 33.33%
Total 82 100.00% 3 100.00%



static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
{
	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 (push)
		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,
				       push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
					      SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 51 77.27% 3 50.00%
Takashi Iwai 14 21.21% 2 33.33%
Uwe Kleine-König 1 1.52% 1 16.67%
Total 66 100.00% 6 100.00%



static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
{
	if (substream->runtime->trigger_master == substream)
		substream->ops->trigger(substream,
					push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
					SNDRV_PCM_TRIGGER_PAUSE_PUSH);
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 37 94.87% 1 50.00%
Takashi Iwai 2 5.13% 1 50.00%
Total 39 100.00% 2 100.00%



static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	snd_pcm_trigger_tstamp(substream);
	if (push) {
		runtime->status->state = SNDRV_PCM_STATE_PAUSED;
		snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MPAUSE);
		wake_up(&runtime->sleep);
		wake_up(&runtime->tsleep);
	} else {
		runtime->status->state = SNDRV_PCM_STATE_RUNNING;
		snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MCONTINUE);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 77 92.77% 3 60.00%
Takashi Iwai 4 4.82% 1 20.00%
Jie Yang 2 2.41% 1 20.00%
Total 83 100.00% 5 100.00%


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, int push)
{
	return snd_pcm_action(&snd_pcm_action_pause, substream, push);
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 23 92.00% 3 75.00%
Takashi Iwai 2 8.00% 1 25.00%
Total 25 100.00% 4 100.00%

#ifdef CONFIG_PM
/* suspend */



static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
		return -EBUSY;
	runtime->trigger_master = substream;
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 42 91.30% 1 50.00%
Takashi Iwai 4 8.70% 1 50.00%
Total 46 100.00% 2 100.00%



static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int 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);
	return 0; /* suspend unconditionally */
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 56 93.33% 3 75.00%
Takashi Iwai 4 6.67% 1 25.00%
Total 60 100.00% 4 100.00%



static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	snd_pcm_trigger_tstamp(substream);
	runtime->status->suspended_state = runtime->status->state;
	runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
	snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSUSPEND);
	wake_up(&runtime->sleep);
	wake_up(&runtime->tsleep);
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 60 84.51% 4 57.14%
Takashi Iwai 10 14.08% 2 28.57%
Jie Yang 1 1.41% 1 14.29%
Total 71 100.00% 7 100.00%


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 @substream is %NULL), or a negative error
 * code.
 */


int snd_pcm_suspend(struct snd_pcm_substream *substream)
{
	int err;
	unsigned long flags;

	if (! substream)
		return 0;

	snd_pcm_stream_lock_irqsave(substream, flags);
	err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
	snd_pcm_stream_unlock_irqrestore(substream, flags);
	return err;
}
Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 44 81.48% 3 60.00%
Takashi Iwai 10 18.52% 2 40.00%
Total 54 100.00% 5 100.00%


EXPORT_SYMBOL(snd_pcm_suspend);

/**
 * 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 (stream = 0; stream < 2; stream++) {
		for (substream = pcm->streams[stream].substream;
		     substream; substream = substream->next) {
			/* FIXME: the open/close code should lock this as well */
			if (substream->runtime == NULL)
				continue;
			err = snd_pcm_suspend(substream);
			if (err < 0 && err != -EBUSY)
				return err;
		}
	}
	return 0;
}
Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 90 88.24% 3 60.00%
Takashi Iwai 12 11.76% 2 40.00%
Total 102 100.00% 5 100.00%


EXPORT_SYMBOL(snd_pcm_suspend_all);

/* resume */



static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
		return -ENOSYS;
	runtime->trigger_master = substream;
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 43 91.49% 1 50.00%
Takashi Iwai 4 8.51% 1 50.00%
Total 47 100.00% 2 100.00%



static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	if (runtime->trigger_master != substream)
		return 0;
	/* DMA not running previously? */
	if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
	    (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
	     substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
		return 0;
	return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 72 94.74% 4 80.00%
Takashi Iwai 4 5.26% 1 20.00%
Total 76 100.00% 5 100.00%



static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
{
	if (substream->runtime->trigger_master == substream &&
	    snd_pcm_running(substream))
		substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 38 95.00% 1 50.00%
Takashi Iwai 2 5.00% 1 50.00%
Total 40 100.00% 2 100.00%



static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	snd_pcm_trigger_tstamp(substream);
	runtime->status->state = runtime->status->suspended_state;
	snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MRESUME);
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 30 63.83% 3 50.00%
Takashi Iwai 16 34.04% 2 33.33%
Jie Yang 1 2.13% 1 16.67%
Total 47 100.00% 6 100.00%


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, 0);
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 19 86.36% 2 50.00%
Takashi Iwai 3 13.64% 2 50.00%
Total 22 100.00% 4 100.00%

#else



static int snd_pcm_resume(struct snd_pcm_substream *substream)
{
	return -ENOSYS;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 13 86.67% 1 50.00%
Takashi Iwai 2 13.33% 1 50.00%
Total 15 100.00% 2 100.00%

#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->status->state) {
	case SNDRV_PCM_STATE_XRUN:
		result = 0;	/* already there */
		break;
	case SNDRV_PCM_STATE_RUNNING:
		result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
		break;
	default:
		result = -EBADFD;
	}
	snd_pcm_stream_unlock_irq(substream);
	return result;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 70 94.59% 3 75.00%
Takashi Iwai 4 5.41% 1 25.00%
Total 74 100.00% 4 100.00%

/*
 * reset ioctl
 */


static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	switch (runtime->status->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;
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 49 92.45% 1 50.00%
Takashi Iwai 4 7.55% 1 50.00%
Total 53 100.00% 2 100.00%



static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
	if (err < 0)
		return err;
	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;
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 88 94.62% 4 66.67%
Takashi Iwai 4 4.30% 1 16.67%
Mika Kukkonen 1 1.08% 1 16.67%
Total 93 100.00% 6 100.00%



static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	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);
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 52 92.86% 2 66.67%
Takashi Iwai 4 7.14% 1 33.33%
Total 56 100.00% 3 100.00%


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, 0);
}

Contributors
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Jaroslav Kysela 20 90.91% 4 80.00%
Takashi Iwai 2 9.09% 1 20.00%
Total 22 100.00% 5 100.00%

/*
 * prepare ioctl
 */
/* we use the second argument for updating f_flags */


static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
			       int f_flags)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
	    runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
		return -EBADFD;
	if (snd_pcm_running(substream))
		return -EBUSY;
	substream->f_flags = f_flags;
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 46 70.77% 2 40.00%
Takashi Iwai 19 29.23% 3 60.00%
Total 65 100.00% 5 100.00%



static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
{
	int err;
	err = substream->ops->prepare(substream);
	if (err < 0)
		return err;
	return snd_pcm_do_reset(substream, 0);
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 43 95.56% 1 50.00%
Takashi Iwai 2 4.44% 1 50.00%
Total 45 100.00% 2 100.00%



static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int 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);
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 33 78.57% 1 33.33%
Takashi Iwai 9 21.43% 2 66.67%
Total 42 100.00% 3 100.00%


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->status->state) {
	case SNDRV_PCM_STATE_PAUSED:
		snd_pcm_pause(substream, 0);
		/* fallthru */
	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, f_flags);
}

Contributors
Person Tokens Prop Commits CommitProp
Takashi Iwai 57 62.64% 4 50.00%
Jaroslav Kysela 34 37.36% 4 50.00%
Total 91 100.00% 8 100.00%

/*
 * drain ioctl
 */



static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	switch (runtime->status->state) {
	case SNDRV_PCM_STATE_OPEN:
	case SNDRV_PCM_STATE_DISCONNECTED:
	case SNDRV_PCM_STATE_SUSPENDED:
		return -EBADFD;
	}
	runtime->trigger_master = substream;
	return 0;
}

Contributors
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Takashi Iwai 32 58.18% 2 40.00%
Jaroslav Kysela 23 41.82% 3 60.00%
Total 55 100.00% 5 100.00%



static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		switch (runtime->status->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 {
				runtime->status->state = SNDRV_PCM_STATE_SETUP;
			}
			break;
		case SNDRV_PCM_STATE_RUNNING:
			runtime->status->state = SNDRV_PCM_STATE_DRAINING;
			break;
		case SNDRV_PCM_STATE_XRUN:
			runtime->status->state = SNDRV_PCM_STATE_SETUP;
			break;
		default:
			break;
		}
	} else {
		/* stop running stream */
		if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
			int 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->status->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;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 126 64.95% 3 37.50%
Libin Yang 38 19.59% 1 12.50%
Takashi Iwai 27 13.92% 3 37.50%
Marcin Ślusarz 3 1.55% 1 12.50%
Total 194 100.00% 8 100.00%



static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
{
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 11 84.62% 1 50.00%
Takashi Iwai 2 15.38% 1 50.00%
Total 13 100.00% 2 100.00%


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
};

static int snd_pcm_drop(struct snd_pcm_substream *substream);

/*
 * 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;
	wait_queue_entry_t wait;
	int result = 0;
	int nonblock = 0;

	card = substream->pcm->card;
	runtime = substream->runtime;

	if (runtime->status->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;

	down_read(&snd_pcm_link_rwsem);
	snd_pcm_stream_lock_irq(substream);
	/* resume pause */
	if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
		snd_pcm_pause(substream, 0);

	/* pre-start/stop - all running streams are changed to DRAINING state */
	result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
	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;
		snd_pcm_group_for_each_entry(s, substream) {
			if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
				continue;
			runtime = s->runtime;
			if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
				to_check = runtime;
				break;
			}
		}
		if (!to_check)
			break; /* all drained */
		init_waitqueue_entry(&wait, current);
		add_wait_queue(&to_check->sleep, &wait);
		snd_pcm_stream_unlock_irq(substream);
		up_read(&snd_pcm_link_rwsem);
		snd_power_unlock(card);
		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_interruptible(tout);
		snd_power_lock(card);
		down_read(&snd_pcm_link_rwsem);
		snd_pcm_stream_lock_irq(substream);
		remove_wait_queue(&to_check->sleep, &wait);
		if (card->shutdown) {
			result = -ENODEV;
			break;
		}
		if (tout == 0) {
			if (substream->runtime->status->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);
	up_read(&snd_pcm_link_rwsem);

	return result;
}

Contributors
Person Tokens Prop Commits CommitProp
Takashi Iwai 296 64.35% 8 53.33%
Jaroslav Kysela 163 35.43% 6 40.00%
Ingo Molnar 1 0.22% 1 6.67%
Total 460 100.00% 15 100.00%

/*
 * 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->status->state == SNDRV_PCM_STATE_OPEN ||
	    runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
		return -EBADFD;

	snd_pcm_stream_lock_irq(substream);
	/* resume pause */
	if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
		snd_pcm_pause(substream, 0);

	snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
	/* runtime->control->appl_ptr = runtime->status->hw_ptr; */
	snd_pcm_stream_unlock_irq(substream);

	return result;
}


Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 74 74.75% 3 42.86%
Takashi Iwai 25 25.25% 4 57.14%
Total 99 100.00% 7 100.00%



static bool is_pcm_file(struct file *file)
{
	struct inode *inode = file_inode(file);
	unsigned int minor;

	if (!S_ISCHR(inode->i_mode) || imajor(inode) != snd_major)
		return false;
	minor = iminor(inode);
	return snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) ||
		snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE);
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 42 62.69% 2 33.33%
Al Viro 14 20.90% 3 50.00%
Clemens Ladisch 11 16.42% 1 16.67%
Total 67 100.00% 6 100.00%

/*
 * 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;
	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;
	group = kmalloc(sizeof(*group), GFP_KERNEL);
	if (!group) {
		res = -ENOMEM;
		goto _nolock;
	}
	down_write_nonblock(&snd_pcm_link_rwsem);
	write_lock_irq(&snd_pcm_link_rwlock);
	if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
	    substream->runtime->status->state != substream1->runtime->status->state ||
	    substream->pcm->nonatomic != substream1->pcm->nonatomic) {
		res = -EBADFD;
		goto _end;
	}
	if (snd_pcm_stream_linked(substream1)) {
		res = -EALREADY;
		goto _end;
	}
	if (!snd_pcm_stream_linked(substream)) {
		substream->group = group;
		group = NULL;
		spin_lock_init(&substream->group->lock);
		mutex_init(&substream->group->mutex);
		INIT_LIST_HEAD(&substream->group->substreams);
		list_add_tail(&substream->link_list, &substream->group->substreams);
		substream->group->count = 1;
	}
	list_add_tail(&substream1->link_list, &substream->group->substreams);
	substream->group->count++;
	substream1->group = substream->group;
 _end:
	write_unlock_irq(&snd_pcm_link_rwlock);
	up_write(&snd_pcm_link_rwsem);
 _nolock:
	snd_card_unref(substream1->pcm->card);
	kfree(group);
 _badf:
	fdput(f);
	return res;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 223 65.98% 6 46.15%
Takashi Iwai 75 22.19% 5 38.46%
Al Viro 40 11.83% 2 15.38%
Total 338 100.00% 13 100.00%



static void relink_to_local(struct snd_pcm_substream *substream)
{
	substream->group = &substream->self_group;
	INIT_LIST_HEAD(&substream->self_group.substreams);
	list_add_tail(&substream->link_list, &substream->self_group.substreams);
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 43 95.56% 2 66.67%
Takashi Iwai 2 4.44% 1 33.33%
Total 45 100.00% 3 100.00%



static int snd_pcm_unlink(struct snd_pcm_substream *substream)
{
	struct snd_pcm_substream *s;
	int res = 0;

	down_write_nonblock(&snd_pcm_link_rwsem);
	write_lock_irq(&snd_pcm_link_rwlock);
	if (!snd_pcm_stream_linked(substream)) {
		res = -EALREADY;
		goto _end;
	}
	list_del(&substream->link_list);
	substream->group->count--;
	if (substream->group->count == 1) {	/* detach the last stream, too */
		snd_pcm_group_for_each_entry(s, substream) {
			relink_to_local(s);
			break;
		}
		kfree(substream->group);
	}
	relink_to_local(substream);
       _end:
	write_unlock_irq(&snd_pcm_link_rwlock);
	up_write(&snd_pcm_link_rwsem);
	return res;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 114 93.44% 7 70.00%
Takashi Iwai 8 6.56% 3 30.00%
Total 122 100.00% 10 100.00%

/*
 * 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);
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 60 90.91% 1 50.00%
Takashi Iwai 6 9.09% 1 50.00%
Total 66 100.00% 2 100.00%



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);
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 60 90.91% 1 50.00%
Takashi Iwai 6 9.09% 1 50.00%
Total 66 100.00% 2 100.00%



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);
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 68 91.89% 1 50.00%
Takashi Iwai 6 8.11% 1 50.00%
Total 74 100.00% 2 100.00%



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);
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 68 91.89% 1 50.00%
Takashi Iwai 6 8.11% 1 50.00%
Total 74 100.00% 2 100.00%



static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
				  struct snd_pcm_hw_rule *rule)
{
	unsigned int 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);
	for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
		int bits;
		if (! snd_mask_test(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, k);
	}
	return snd_mask_refine(mask, &m);
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 129 91.49% 3 60.00%
Takashi Iwai 10 7.09% 1 20.00%
Takashi Sakamoto 2 1.42% 1 20.00%
Total 141 100.00% 5 100.00%



static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
				       struct snd_pcm_hw_rule *rule)
{
	struct snd_interval t;
	unsigned int k;
	t.min = UINT_MAX;
	t.max = 0;
	t.openmin = 0;
	t.openmax = 0;
	for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
		int bits;
		if (! snd_mask_test(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);
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 147 96.08% 3 75.00%
Takashi Iwai 6 3.92% 1 25.00%
Total 153 100.00% 4 100.00%

#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
};


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);
}		

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 38 76.00% 1 33.33%
Clemens Ladisch 6 12.00% 1 33.33%
Takashi Iwai 6 12.00% 1 33.33%
Total 50 100.00% 3 100.00%



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);
}		

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 69 89.61% 1 50.00%
Takashi Iwai 8 10.39% 1 50.00%
Total 77 100.00% 2 100.00%



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;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 789 98.26% 1 33.33%
Mika Kukkonen 8 1.00% 1 33.33%
Takashi Iwai 6 0.75% 1 33.33%
Total 803 100.00% 3 100.00%



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 |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
        if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
		mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
	if (hw_support_mmap(substream)) {
		if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
			mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
		if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
			mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
		if (hw->info & SNDRV_PCM_INFO_COMPLEX)
			mask |= 1 << 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, 1 << 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;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 348 80.93% 2 33.33%
Takashi Iwai 81 18.84% 3 50.00%
Sachin Kamat 1 0.23% 1 16.67%
Total 430 100.00% 6 100.00%



static void pcm_release_private(struct snd_pcm_substream *substream)
{
	snd_pcm_unlink(substream);
}

Contributors
Person Tokens Prop Commits CommitProp
Takashi Iwai 9 56.25% 2 66.67%
Jaroslav Kysela 7 43.75% 1 33.33%
Total 16 100.00% 3 100.00%



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->ops->hw_free &&
		    substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
			substream->ops->hw_free(substream);
		substream->ops->close(substream);
		substream->hw_opened = 0;
	}
	if (pm_qos_request_active(&substream->latency_pm_qos_req))
		pm_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);
}
Contributors
Person Tokens Prop Commits CommitProp
Takashi Iwai 84 68.29% 5 62.50%
Jaroslav Kysela 38 30.89% 2 25.00%
Karsten Wiese 1 0.81% 1 12.50%
Total 123 100.00% 8 100.00%


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;
	}

	if ((err = substream->ops->open(substream)) < 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;
	}

	*rsubstream = substream;
	return 0;

 error:
	snd_pcm_release_substream(substream);
	return err;
}
Contributors
Person Tokens Prop Commits CommitProp
Takashi Iwai 153 91.62% 3 75.00%
Jaroslav Kysela 14 8.38% 1 25.00%
Total 167 100.00% 4 100.00%


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->file = pcm_file;
		substream->pcm_release = pcm_release_private;
	}
	file->private_data = pcm_file;

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 68 55.74% 3 37.50%
Takashi Iwai 54 44.26% 5 62.50%
Total 122 100.00% 8 100.00%



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;
}

Contributors
Person Tokens Prop Commits CommitProp
Takashi Iwai 35 45.45% 3 42.86%
Clemens Ladisch 22 28.57% 1 14.29%
Jaroslav Kysela 19 24.68% 2 28.57%
Al Viro 1 1.30% 1 14.29%
Total 77 100.00% 7 100.00%



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;
}

Contributors
Person Tokens Prop Commits CommitProp
Takashi Iwai 35 45.45% 3 50.00%
Clemens Ladisch 35 45.45% 1 16.67%
Jaroslav Kysela 6 7.79% 1 16.67%
Al Viro 1 1.30% 1 16.67%
Total 77 100.00% 6 100.00%



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;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 224 81.75% 3 25.00%
Takashi Iwai 20 7.30% 3 25.00%
Clemens Ladisch 16 5.84% 1 8.33%
Andrew Morton 7 2.55% 1 8.33%
Ingo Molnar 5 1.82% 2 16.67%
Christoph Hellwig 2 0.73% 2 16.67%
Total 274 100.00% 12 100.00%



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;
	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;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 90 77.59% 4 40.00%
Takashi Iwai 23 19.83% 4 40.00%
Ingo Molnar 2 1.72% 1 10.00%
Christoph Hellwig 1 0.86% 1 10.00%
Total 116 100.00% 10 100.00%

/* 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->status->state) {
	case SNDRV_PCM_STATE_DRAINING:
		if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
			return -EBADFD;
		/* Fall through */
	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;
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Takashi Iwai 40 52.63% 2 40.00%
Jaroslav Kysela 31 40.79% 2 40.00%
Lubomir Rintel 5 6.58% 1 20.00%
Total 76 100.00% 5 100.00%

/* 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;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 71 71.72% 4 50.00%
Takashi Iwai 27 27.27% 3 37.50%
Takashi Sakamoto 1 1.01% 1 12.50%
Total 99 100.00% 8 100.00%

/* decrease the appl_ptr; returns the processed frames or a negative 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);
	return ret < 0 ? ret : frames;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 73 77.66% 4 50.00%
Takashi Iwai 20 21.28% 3 37.50%
Takashi Sakamoto 1 1.06% 1 12.50%
Total 94 100.00% 8 100.00%



static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
						 snd_pcm_uframes_t frames)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	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_playback_hw_avail(runtime));
	snd_pcm_stream_unlock_irq(substream);
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 46 62.16% 3 42.86%
Takashi Iwai 27 36.49% 3 42.86%
Lubomir Rintel 1 1.35% 1 14.29%
Total 74 100.00% 7 100.00%



static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
						snd_pcm_uframes_t frames)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	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_capture_hw_avail(runtime));
	snd_pcm_stream_unlock_irq(substream);
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
Takashi Iwai 51 68.92% 1 33.33%
Jaroslav Kysela 23 31.08% 2 66.67%
Total 74 100.00% 3 100.00%



static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
						  snd_pcm_uframes_t frames)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	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_playback_avail(runtime));
	snd_pcm_stream_unlock_irq(substream);
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 46 62.16% 3 42.86%
Takashi Iwai 27 36.49% 3 42.86%
Lubomir Rintel 1 1.35% 1 14.29%
Total 74 100.00% 7 100.00%



static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
						 snd_pcm_uframes_t frames)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	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_capture_avail(runtime));
	snd_pcm_stream_unlock_irq(substream);
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
Takashi Iwai 51 68.92% 1 33.33%
Jaroslav Kysela 23 31.08% 2 66.67%
Total 74 100.00% 3 100.00%



static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
{
	int err;

	snd_pcm_stream_lock_irq(substream);
	err = do_pcm_hwsync(substream);
	snd_pcm_stream_unlock_irq(substream);
	return err;
}
		
Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 31 91.18% 4 66.67%
Takashi Iwai 3 8.82% 2 33.33%
Total 34 100.00% 6 100.00%



static snd_pcm_sframes_t snd_pcm_delay(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	int err;
	snd_pcm_sframes_t n = 0;

	snd_pcm_stream_lock_irq(substream);
	err = do_pcm_hwsync(substream);
	if (!err) {
		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
			n = snd_pcm_playback_hw_avail(runtime);
		else
			n = snd_pcm_capture_avail(runtime);
		n += runtime->delay;
	}
	snd_pcm_stream_unlock_irq(substream);
	return err < 0 ? err : n;
}
		
Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 66 73.33% 5 55.56%
Takashi Iwai 24 26.67% 4 44.44%
Total 90 100.00% 9 100.00%



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;
	snd_pcm_stream_unlock_irq(substream);
	if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
		return -EFAULT;
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 291 88.99% 3 42.86%
Takashi Iwai 33 10.09% 2 28.57%
Al Viro 2 0.61% 1 14.29%
Takashi Sakamoto 1 0.31% 1 14.29%
Total 327 100.00% 7 100.00%



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;
}
		
Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 64 100.00% 1 100.00%
Total 64 100.00% 1 100.00%



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;

	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_STATUS:
		return snd_pcm_status_user(substream, arg, false);
	case SNDRV_PCM_IOCTL_STATUS_EXT:
		return snd_pcm_status_user(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 = snd_pcm_delay(substream);
		snd_pcm_sframes_t __user *res = arg;

		if (delay < 0)
			return delay;
		if (put_user(delay, res))
			return -EFAULT;
		return 0;
	}
	case SNDRV_PCM_IOCTL_SYNC_PTR:
		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_action_lock_irq(&snd_pcm_action_pause,
					       substream,
					       (int)(unsigned long)arg);
	}
	pcm_dbg(substream->pcm, "unknown ioctl = 0x%x\n", cmd);
	return -ENOTTY;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 281 67.22% 12 50.00%
Takashi Iwai 116 27.75% 10 41.67%
Pierre-Louis Bossart 15 3.59% 1 4.17%
Al Viro 6 1.44% 1 4.17%
Total 418 100.00% 24 100.00%



static int snd_pcm_common_ioctl1(struct file *file,
				 struct snd_pcm_substream *substream,
				 unsigned int cmd, void __user *arg)
{
	struct snd_card *card = substream->pcm->card;
	int res;

	snd_power_lock(card);
	res = snd_power_wait(card, SNDRV_CTL_POWER_D0);
	if (res >= 0)
		res = snd_pcm_common_ioctl(file, substream, cmd, arg);
	snd_power_unlock(card);
	return res;
}

Contributors
Person Tokens Prop Commits CommitProp
Takashi Iwai 80 100.00% 1 100.00%
Total 80 100.00% 1 100.00%



static int snd_pcm_playback_ioctl1(struct file *file,
				   struct snd_pcm_substream *substream,
				   unsigned int cmd, void __user *arg)
{
	if (PCM_RUNTIME_CHECK(substream))
		return -ENXIO;
	if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
		return -EINVAL;
	switch (cmd) {
	case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
	{
		struct snd_xferi xferi;
		struct snd_xferi __user *_xferi = arg;
		struct snd_pcm_runtime *runtime = substream->runtime;
		snd_pcm_sframes_t result;
		if (runtime->status->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;
		result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
		__put_user(result, &_xferi->result);
		return result < 0 ? result : 0;
	}
	case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
	{
		struct snd_xfern xfern;
		struct snd_xfern __user *_xfern = arg;
		struct snd_pcm_runtime *runtime = substream->runtime;
		void __user **bufs;
		snd_pcm_sframes_t result;
		if (runtime->status->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);
		result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
		kfree(bufs);
		__put_user(result, &_xfern->result);
		return result < 0 ? result : 0;
	}
	case SNDRV_PCM_IOCTL_REWIND:
	{
		snd_pcm_uframes_t frames;
		snd_pcm_uframes_t __user *_frames = arg;
		snd_pcm_sframes_t result;
		if (get_user(frames, _frames))
			return -EFAULT;
		if (put_user(0, _frames))
			return -EFAULT;
		result = snd_pcm_playback_rewind(substream, frames);
		__put_user(result, _frames);
		return result < 0 ? result : 0;
	}
	case SNDRV_PCM_IOCTL_FORWARD:
	{
		snd_pcm_uframes_t frames;
		snd_pcm_uframes_t __user *_frames = arg;
		snd_pcm_sframes_t result;
		if (get_user(frames, _frames))
			return -EFAULT;
		if (put_user(0, _frames))
			return -EFAULT;
		result = snd_pcm_playback_forward(substream, frames);
		__put_user(result, _frames);
		return result < 0 ? result : 0;
	}
	}
	return snd_pcm_common_ioctl1(file, substream, cmd, arg);
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 420 86.78% 3 33.33%
Takashi Iwai 43 8.88% 4 44.44%
Al Viro 13 2.69% 1 11.11%
Li Zefan 8 1.65% 1 11.11%
Total 484 100.00% 9 100.00%



static int snd_pcm_capture_ioctl1(struct file *file,
				  struct snd_pcm_substream *substream,
				  unsigned int cmd, void __user *arg)
{
	if (PCM_RUNTIME_CHECK(substream))
		return -ENXIO;
	if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
		return -EINVAL;
	switch (cmd) {
	case SNDRV_PCM_IOCTL_READI_FRAMES:
	{
		struct snd_xferi xferi;
		struct snd_xferi __user *_xferi = arg;
		struct snd_pcm_runtime *runtime = substream->runtime;
		snd_pcm_sframes_t result;
		if (runtime->status->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;
		result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
		__put_user(result, &_xferi->result);
		return result < 0 ? result : 0;
	}
	case SNDRV_PCM_IOCTL_READN_FRAMES:
	{
		struct snd_xfern xfern;
		struct snd_xfern __user *_xfern = arg;
		struct snd_pcm_runtime *runtime = substream->runtime;
		void *bufs;
		snd_pcm_sframes_t result;
		if (runtime->status->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);
		result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
		kfree(bufs);
		__put_user(result, &_xfern->result);
		return result < 0 ? result : 0;
	}
	case SNDRV_PCM_IOCTL_REWIND:
	{
		snd_pcm_uframes_t frames;
		snd_pcm_uframes_t __user *_frames = arg;
		snd_pcm_sframes_t result;
		if (get_user(frames, _frames))
			return -EFAULT;
		if (put_user(0, _frames))
			return -EFAULT;
		result = snd_pcm_capture_rewind(substream, frames);
		__put_user(result, _frames);
		return result < 0 ? result : 0;
	}
	case SNDRV_PCM_IOCTL_FORWARD:
	{
		snd_pcm_uframes_t frames;
		snd_pcm_uframes_t __user *_frames = arg;
		snd_pcm_sframes_t result;
		if (get_user(frames, _frames))
			return -EFAULT;
		if (put_user(0, _frames))
			return -EFAULT;
		result = snd_pcm_capture_forward(substream, frames);
		__put_user(result, _frames);
		return result < 0 ? result : 0;
	}
	}
	return snd_pcm_common_ioctl1(file, substream, cmd, arg);
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 420 87.14% 3 33.33%
Takashi Iwai 43 8.92% 4 44.44%
Al Viro 11 2.28% 1 11.11%
Li Zefan 8 1.66% 1 11.11%
Total 482 100.00% 9 100.00%



static long snd_pcm_playback_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_playback_ioctl1(file, pcm_file->substream, cmd,
				       (void __user *)arg);
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 62 92.54% 3 50.00%
Takashi Iwai 4 5.97% 2 33.33%
Al Viro 1 1.49% 1 16.67%
Total 67 100.00% 6 100.00%



static long snd_pcm_capture_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_capture_ioctl1(file, pcm_file->substream, cmd,
				      (void __user *)arg);
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 62 92.54% 3 50.00%
Takashi Iwai 4 5.97% 2 33.33%
Al Viro 1 1.49% 1 16.67%
Total 67 100.00% 6 100.00%

/**
 * 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).
 */


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;
	int err;
	
	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_capture_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:
		snd_power_lock(substream->pcm->card);
		err = snd_pcm_drain(substream, NULL);
		snd_power_unlock(substream->pcm->card);
		return err;
	case SNDRV_PCM_IOCTL_DROP:
		return snd_pcm_drop(substream);
	case SNDRV_PCM_IOCTL_DELAY:
	{
		result = snd_pcm_delay(substream);
		if (result < 0)
			return result;
		*frames = result;
		return 0;
	}
	default:
		return -EINVAL;
	}
}
Contributors
Person Tokens Prop Commits CommitProp
Takashi Iwai 143 74.87% 4 66.67%
Jaroslav Kysela 48 25.13% 2 33.33%
Total 191 100.00% 6 100.00%


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->status->state == SNDRV_PCM_STATE_OPEN)
		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;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 120 88.24% 2 40.00%
Takashi Iwai 15 11.03% 2 40.00%
Al Viro 1 0.74% 1 20.00%
Total 136 100.00% 5 100.00%



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->status->state == SNDRV_PCM_STATE_OPEN)
		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;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 117 85.40% 2 40.00%
Takashi Iwai 19 13.87% 2 40.00%
Al Viro 1 0.73% 1 20.00%
Total 137 100.00% 5 100.00%



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->status->state == SNDRV_PCM_STATE_OPEN)
		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(sizeof(void *) * to->nr_segs, 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;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 188 76.73% 4 44.44%
Al Viro 30 12.24% 2 22.22%
Takashi Iwai 15 6.12% 2 22.22%
Badari Pulavarty 12 4.90% 1 11.11%
Total 245 100.00% 9 100.00%



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->status->state == SNDRV_PCM_STATE_OPEN)
		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(sizeof(void *) * from->nr_segs, 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;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 178 74.48% 4 44.44%
Al Viro 30 12.55% 2 22.22%
Takashi Iwai 19 7.95% 2 22.22%
Badari Pulavarty 12 5.02% 1 11.11%
Total 239 100.00% 9 100.00%



static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
{
	struct snd_pcm_file *pcm_file;
	struct snd_pcm_substream *substream;
	struct snd_pcm_runtime *runtime;
        unsigned int mask;
	snd_pcm_uframes_t avail;

	pcm_file = file->private_data;

	substream = pcm_file->substream;
	if (PCM_RUNTIME_CHECK(substream))
		return POLLOUT | POLLWRNORM | POLLERR;
	runtime = substream->runtime;

	poll_wait(file, &runtime->sleep, wait);

	snd_pcm_stream_lock_irq(substream);
	avail = snd_pcm_playback_avail(runtime);
	switch (runtime->status->state) {
	case SNDRV_PCM_STATE_RUNNING:
	case SNDRV_PCM_STATE_PREPARED:
	case SNDRV_PCM_STATE_PAUSED:
		if (avail >= runtime->control->avail_min) {
			mask = POLLOUT | POLLWRNORM;
			break;
		}
		/* Fall through */
	case SNDRV_PCM_STATE_DRAINING:
		mask = 0;
		break;
	default:
		mask = POLLOUT | POLLWRNORM | POLLERR;
		break;
	}
	snd_pcm_stream_unlock_irq(substream);
	return mask;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 141 88.68% 5 62.50%
Takashi Iwai 13 8.18% 2 25.00%
Charles Keepax 5 3.14% 1 12.50%
Total 159 100.00% 8 100.00%



static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
{
	struct snd_pcm_file *pcm_file;
	struct snd_pcm_substream *substream;
	struct snd_pcm_runtime *runtime;
        unsigned int mask;
	snd_pcm_uframes_t avail;

	pcm_file = file->private_data;

	substream = pcm_file->substream;
	if (PCM_RUNTIME_CHECK(substream))
		return POLLIN | POLLRDNORM | POLLERR;
	runtime = substream->runtime;

	poll_wait(file, &runtime->sleep, wait);

	snd_pcm_stream_lock_irq(substream);
	avail = snd_pcm_capture_avail(runtime);
	switch (runtime->status->state) {
	case SNDRV_PCM_STATE_RUNNING:
	case SNDRV_PCM_STATE_PREPARED:
	case SNDRV_PCM_STATE_PAUSED:
		if (avail >= runtime->control->avail_min) {
			mask = POLLIN | POLLRDNORM;
			break;
		}
		mask = 0;
		break;
	case SNDRV_PCM_STATE_DRAINING:
		if (avail > 0) {
			mask = POLLIN | POLLRDNORM;
			break;
		}
		/* Fall through */
	default:
		mask = POLLIN | POLLRDNORM | POLLERR;
		break;
	}
	snd_pcm_stream_unlock_irq(substream);
	return mask;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 156 89.66% 5 62.50%
Takashi Iwai 13 7.47% 2 25.00%
Charles Keepax 5 2.87% 1 12.50%
Total 174 100.00% 8 100.00%

/*
 * 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 int 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;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 45 71.43% 2 33.33%
Nicholas Piggin 10 15.87% 1 16.67%
Takashi Iwai 4 6.35% 1 16.67%
Dave Jiang 3 4.76% 1 16.67%
Andrew Morton 1 1.59% 1 16.67%
Total 63 100.00% 6 100.00%


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;
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 82 91.11% 1 25.00%
Takashi Iwai 5 5.56% 2 50.00%
Konstantin Khlebnikov 3 3.33% 1 25.00%
Total 90 100.00% 4 100.00%

/*
 * mmap control record
 */


static int 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;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 45 71.43% 2 33.33%
Nicholas Piggin 10 15.87% 1 16.67%
Takashi Iwai 4 6.35% 1 16.67%
Dave Jiang 3 4.76% 1 16.67%
Andrew Morton 1 1.59% 1 16.67%
Total 63 100.00% 6 100.00%


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;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 83 92.22% 1 33.33%
Takashi Iwai 4 4.44% 1 33.33%
Konstantin Khlebnikov 3 3.33% 1 33.33%
Total 90 100.00% 3 100.00%



static bool pcm_status_mmap_allowed(struct snd_pcm_file *pcm_file)
{
	if (pcm_file->no_compat_mmap)
		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;
}

Contributors
Person Tokens Prop Commits CommitProp
Takashi Iwai 56 100.00% 2 100.00%
Total 56 100.00% 2 100.00%



static bool pcm_control_mmap_allowed(struct snd_pcm_file *pcm_file)
{
	if (pcm_file->no_compat_mmap)
		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;
}

Contributors
Person Tokens Prop Commits CommitProp
Takashi Iwai 41 100.00% 2 100.00%
Total 41 100.00% 2 100.00%

#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;
}
Contributors
Person Tokens Prop Commits CommitProp
Takashi Iwai 16 64.00% 2 66.67%
Jaroslav Kysela 9 36.00% 1 33.33%
Total 25 100.00% 3 100.00%



static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
				struct vm_area_struct *area)
{
	return -ENXIO;
}
Contributors
Person Tokens Prop Commits CommitProp
Takashi Iwai 16 64.00% 2 66.67%
Jaroslav Kysela 9 36.00% 1 33.33%
Total 25 100.00% 3 100.00%

#endif /* coherent mmap */


static inline struct page *

snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
{
	void *vaddr = substream->runtime->dma_area + ofs;
	return virt_to_page(vaddr);
}

Contributors
Person Tokens Prop Commits CommitProp
Takashi Iwai 36 100.00% 1 100.00%
Total 36 100.00% 1 100.00%

/*
 * fault callback for mmapping a RAM page
 */


static int 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
		page = snd_pcm_default_page_ops(substream, offset);
	if (!page)
		return VM_FAULT_SIGBUS;
	get_page(page);
	vmf->page = page;
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 101 74.81% 4 44.44%
Nicholas Piggin 14 10.37% 1 11.11%
Takashi Iwai 14 10.37% 2 22.22%
Dave Jiang 3 2.22% 1 11.11%
Andrew Morton 3 2.22% 1 11.11%
Total 135 100.00% 9 100.00%


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.
 */


int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
			     struct vm_area_struct *area)
{
	area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
#ifdef CONFIG_GENERIC_ALLOCATOR
	if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_IRAM) {
		area->vm_page_prot = pgprot_writecombine(area->vm_page_prot);
		return remap_pfn_range(area, area->vm_start,
				substream->dma_buffer.addr >> PAGE_SHIFT,
				area->vm_end - area->vm_start, area->vm_page_prot);
	}
#endif /* CONFIG_GENERIC_ALLOCATOR */
#ifndef CONFIG_X86 /* for avoiding warnings arch/x86/mm/pat.c */
	if (IS_ENABLED(CONFIG_HAS_DMA) && !substream->ops->page &&
	    substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
		return dma_mmap_coherent(substream->dma_buffer.dev.dev,
					 area,
					 substream->runtime->dma_area,
					 substream->runtime->dma_addr,
					 area->vm_end - area->vm_start);
#endif /* CONFIG_X86 */
	/* mmap with fault handler */
	area->vm_ops = &snd_pcm_vm_ops_data_fault;
	return 0;
}
Contributors
Person Tokens Prop Commits CommitProp
Takashi Iwai 97 60.62% 6 66.67%
Nicolin Chen 55 34.38% 1 11.11%
Geert Uytterhoeven 5 3.12% 1 11.11%
Konstantin Khlebnikov 3 1.88% 1 11.11%
Total 160 100.00% 9 100.00%


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.
 */


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);
}
Contributors
Person Tokens Prop Commits CommitProp
Takashi Iwai 37 74.00% 2 66.67%
Linus Torvalds 13 26.00% 1 33.33%
Total 50 100.00% 3 100.00%


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->status->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;
}
Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 196 78.40% 3 42.86%
Takashi Iwai 54 21.60% 4 57.14%
Total 250 100.00% 7 100.00%


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;

	offset = area->vm_pgoff << PAGE_SHIFT;
	switch (offset) {
	case SNDRV_PCM_MMAP_OFFSET_STATUS:
		if (!pcm_status_mmap_allowed(pcm_file))
			return -ENXIO;
		return snd_pcm_mmap_status(substream, file, area);
	case SNDRV_PCM_MMAP_OFFSET_CONTROL:
		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;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 108 82.44% 3 37.50%
Takashi Iwai 23 17.56% 5 62.50%
Total 131 100.00% 8 100.00%



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;
	return fasync_helper(fd, file, on, &runtime->fasync);
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 60 78.95% 2 40.00%
Takashi Iwai 16 21.05% 3 60.00%
Total 76 100.00% 5 100.00%

/*
 * 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;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 155 98.10% 2 66.67%
Takashi Iwai 3 1.90% 1 33.33%
Total 158 100.00% 3 100.00%



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;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 155 98.10% 2 66.67%
Takashi Iwai 3 1.90% 1 33.33%
Total 158 100.00% 3 100.00%



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;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 124 71.68% 2 28.57%
Takashi Sakamoto 29 16.76% 2 28.57%
Li Zefan 13 7.51% 1 14.29%
Takashi Iwai 6 3.47% 1 14.29%
Al Viro 1 0.58% 1 14.29%
Total 173 100.00% 7 100.00%



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;
}
Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 124 80.00% 2 33.33%
Li Zefan 13 8.39% 1 16.67%
Takashi Sakamoto 11 7.10% 1 16.67%
Takashi Iwai 6 3.87% 1 16.67%
Al Viro 1 0.65% 1 16.67%
Total 155 100.00% 6 100.00%

#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:
		return (unsigned long)runtime->status;
	case SNDRV_PCM_MMAP_OFFSET_CONTROL:
		return (unsigned long)runtime->control;
	default:
		return (unsigned long)runtime->dma_area + offset;
	}
}
Contributors
Person Tokens Prop Commits CommitProp
Daniel Glöckner 75 71.43% 1 50.00%
Cliff Cai 30 28.57% 1 50.00%
Total 105 100.00% 2 100.00%

#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_playback_poll,
		.unlocked_ioctl =	snd_pcm_playback_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_capture_poll,
		.unlocked_ioctl =	snd_pcm_capture_ioctl,
		.compat_ioctl = 	snd_pcm_ioctl_compat,
		.mmap =			snd_pcm_mmap,
		.fasync =		snd_pcm_fasync,
		.get_unmapped_area =	snd_pcm_get_unmapped_area,
        }
};
Overall Contributors
Person Tokens Prop Commits CommitProp
Jaroslav Kysela 12535 68.92% 63 29.58%
Takashi Iwai 3703 20.36% 72 33.80%
Takashi Sakamoto 867 4.77% 20 9.39%
Pierre-Louis Bossart 187 1.03% 5 2.35%
Clemens Ladisch 181 1.00% 6 2.82%
Al Viro 165 0.91% 6 2.82%
Daniel Glöckner 78 0.43% 1 0.47%
Li Zefan 60 0.33% 1 0.47%
Nicolin Chen 55 0.30% 1 0.47%
Cliff Cai 48 0.26% 1 0.47%
Jie Yang 48 0.26% 1 0.47%
Nicholas Piggin 41 0.23% 1 0.47%
Libin Yang 38 0.21% 1 0.47%
Badari Pulavarty 24 0.13% 1 0.47%
Julia Lawall 13 0.07% 1 0.47%
Linus Torvalds 13 0.07% 1 0.47%
Mark Gross 12 0.07% 1 0.47%
Andrew Morton 12 0.07% 2 0.94%
Ingo Molnar 11 0.06% 3 1.41%
Charles Keepax 10 0.05% 1 0.47%
James Bottomley 10 0.05% 1 0.47%
Dave Jiang 9 0.05% 1 0.47%
Konstantin Khlebnikov 9 0.05% 1 0.47%
Mika Kukkonen 9 0.05% 1 0.47%
Lubomir Rintel 7 0.04% 1 0.47%
Christoph Hellwig 6 0.03% 3 1.41%
Dan Carpenter 6 0.03% 1 0.47%
Geert Uytterhoeven 5 0.03% 1 0.47%
Yacine Belkadi 4 0.02% 1 0.47%
Alexey Dobriyan 3 0.02% 1 0.47%
Paul Gortmaker 3 0.02% 1 0.47%
Marcin Ślusarz 3 0.02% 1 0.47%
Benjamin Collins 3 0.02% 1 0.47%
Frederik Deweerdt 2 0.01% 1 0.47%
Adrian Bunk 2 0.01% 1 0.47%
Arjan van de Ven 1 0.01% 1 0.47%
Lucas De Marchi 1 0.01% 1 0.47%
Jean Pihet 1 0.01% 1 0.47%
Uwe Kleine-König 1 0.01% 1 0.47%
Karsten Wiese 1 0.01% 1 0.47%
Masanari Iida 1 0.01% 1 0.47%
Sachin Kamat 1 0.01% 1 0.47%
Total 18189 100.00% 213 100.00%
Directory: sound/core

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.
Person	Tokens	Prop	Commits	CommitProp
Takashi Iwai	23	100.00%	1	100.00%
Total	23	100.00%	1	100.00%
cregit-Linux how code gets into the kernel

Release 4.13 sound/core/pcm_native.c

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