EventChannel.c File Reference

#include "EventChannel.h"
#include <Library/XenHypercallLib.h>

Go to the source code of this file.

Functions
UINT32	XenEventChannelNotify (IN XENBUS_DEVICE *Dev, IN evtchn_port_t Port)
UINT32 EFIAPI	XenBusEventChannelAllocate (IN XENBUS_PROTOCOL *This, IN domid_t DomainId, OUT evtchn_port_t *Port)
UINT32 EFIAPI	XenBusEventChannelNotify (IN XENBUS_PROTOCOL *This, IN evtchn_port_t Port)
UINT32 EFIAPI	XenBusEventChannelClose (IN XENBUS_PROTOCOL *This, IN evtchn_port_t Port)

Detailed Description

Event Channel function implementation.

Event channel are use to notify of an event that happened in a shared structure for example.

Copyright (C) 2014, Citrix Ltd.

SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file EventChannel.c.

Function Documentation

XenBusEventChannelAllocate()

UINT32 EFIAPI XenBusEventChannelAllocate	(	IN XENBUS_PROTOCOL *	This,
		IN domid_t	DomainId,
		OUT evtchn_port_t *	Port
	)

Allocate a port that can be bind from domain DomainId.

Parameters

This	A pointer to the XENBUS_PROTOCOL.
DomainId	The domain ID that can bind the newly allocated port.
Port	A pointer to a evtchn_port_t that will contain the newly allocated port.

Return values

UINT32

The return value from the hypercall, 0 if success.

Definition at line 32 of file EventChannel.c.

XenBusEventChannelClose()

UINT32 EFIAPI XenBusEventChannelClose	(	IN XENBUS_PROTOCOL *	This,
		IN evtchn_port_t	Port
	)

Close a local event channel Port.

Parameters

This	A pointer to the XENBUS_PROTOCOL.
Port	The event channel to close.

Return values

UINT32

The return value from the hypercall, 0 if success.

Definition at line 71 of file EventChannel.c.

XenBusEventChannelNotify()

UINT32 EFIAPI XenBusEventChannelNotify	(	IN XENBUS_PROTOCOL *	This,
		IN evtchn_port_t	Port
	)

Send an event to the remote end of the channel whose local endpoint is Port.

Parameters

This	A pointer to the XENBUS_PROTOCOL.
Port	Local port to the event from.

Return values

UINT32

The return value from the hypercall, 0 if success.

Definition at line 58 of file EventChannel.c.

XenEventChannelNotify()

UINT32 XenEventChannelNotify	(	IN XENBUS_DEVICE *	Dev,
		IN evtchn_port_t	Port
	)

Send an event to the remote end of the channel whose local endpoint is Port.

Parameters

Dev	A pointer to XENBUS_DEVICE.
Port	The port to notify.

Returns

Return 0 on success, or return the errno code from the hypercall.

Definition at line 17 of file EventChannel.c.