linux/sound/xen/xen_snd_front_evtchnl.c

// SPDX-License-Identifier: GPL-2.0 OR MIT

/*
 * Xen para-virtual sound device
 *
 * Copyright (C) 2016-2018 EPAM Systems Inc.
 *
 * Author: Oleksandr Andrushchenko <[email protected]>
 */

#include <xen/events.h>
#include <xen/grant_table.h>
#include <xen/xen.h>
#include <xen/xenbus.h>

#include "xen_snd_front.h"
#include "xen_snd_front_alsa.h"
#include "xen_snd_front_cfg.h"
#include "xen_snd_front_evtchnl.h"

static irqreturn_t evtchnl_interrupt_req(int irq, void *dev_id)
{ … }

static irqreturn_t evtchnl_interrupt_evt(int irq, void *dev_id)
{ … }

void xen_snd_front_evtchnl_flush(struct xen_snd_front_evtchnl *channel)
{ … }

static void evtchnl_free(struct xen_snd_front_info *front_info,
			 struct xen_snd_front_evtchnl *channel)
{ … }

void xen_snd_front_evtchnl_free_all(struct xen_snd_front_info *front_info)
{ … }

static int evtchnl_alloc(struct xen_snd_front_info *front_info, int index,
			 struct xen_snd_front_evtchnl *channel,
			 enum xen_snd_front_evtchnl_type type)
{ … }

int xen_snd_front_evtchnl_create_all(struct xen_snd_front_info *front_info,
				     int num_streams)
{ … }

static int evtchnl_publish(struct xenbus_transaction xbt,
			   struct xen_snd_front_evtchnl *channel,
			   const char *path, const char *node_ring,
			   const char *node_chnl)
{ … }

int xen_snd_front_evtchnl_publish_all(struct xen_snd_front_info *front_info)
{ … }

void xen_snd_front_evtchnl_pair_set_connected(struct xen_snd_front_evtchnl_pair *evt_pair,
					      bool is_connected)
{ … }

void xen_snd_front_evtchnl_pair_clear(struct xen_snd_front_evtchnl_pair *evt_pair)
{ … }