linux/drivers/gpu/drm/xen/xen_drm_front_evtchnl.c

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

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

#include <linux/errno.h>
#include <linux/irq.h>

#include <drm/drm_print.h>

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

#include "xen_drm_front.h"
#include "xen_drm_front_evtchnl.h"

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

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

static void evtchnl_free(struct xen_drm_front_info *front_info,
			 struct xen_drm_front_evtchnl *evtchnl)
{ … }

static int evtchnl_alloc(struct xen_drm_front_info *front_info, int index,
			 struct xen_drm_front_evtchnl *evtchnl,
			 enum xen_drm_front_evtchnl_type type)
{ … }

int xen_drm_front_evtchnl_create_all(struct xen_drm_front_info *front_info)
{ … }

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

int xen_drm_front_evtchnl_publish_all(struct xen_drm_front_info *front_info)
{ … }

void xen_drm_front_evtchnl_flush(struct xen_drm_front_evtchnl *evtchnl)
{ … }

void xen_drm_front_evtchnl_set_state(struct xen_drm_front_info *front_info,
				     enum xen_drm_front_evtchnl_state state)
{ … }

void xen_drm_front_evtchnl_free_all(struct xen_drm_front_info *front_info)
{ … }