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/** @file
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
**/
#include "EventChannel.h"
#include <Library/XenHypercallLib.h>
UINT32
XenEventChannelNotify (
IN XENBUS_DEVICE *Dev,
IN evtchn_port_t Port
)
{
INTN ReturnCode;
evtchn_send_t Send;
Send.port = Port;
ReturnCode = XenHypercallEventChannelOp (EVTCHNOP_send, &Send);
return (UINT32)ReturnCode;
}
UINT32
EFIAPI
XenBusEventChannelAllocate (
IN XENBUS_PROTOCOL *This,
IN domid_t DomainId,
OUT evtchn_port_t *Port
)
{
evtchn_alloc_unbound_t Parameter;
UINT32 ReturnCode;
Parameter.dom = DOMID_SELF;
Parameter.remote_dom = DomainId;
ReturnCode = (UINT32)XenHypercallEventChannelOp (
EVTCHNOP_alloc_unbound,
&Parameter);
if (ReturnCode != 0) {
DEBUG ((DEBUG_ERROR, "ERROR: alloc_unbound failed with rc=%d", ReturnCode));
return ReturnCode;
}
*Port = Parameter.port;
return ReturnCode;
}
UINT32
EFIAPI
XenBusEventChannelNotify (
IN XENBUS_PROTOCOL *This,
IN evtchn_port_t Port
)
{
XENBUS_PRIVATE_DATA *Private;
Private = XENBUS_PRIVATE_DATA_FROM_THIS(This);
return XenEventChannelNotify (Private->Dev, Port);
}
UINT32
EFIAPI
XenBusEventChannelClose (
IN XENBUS_PROTOCOL *This,
IN evtchn_port_t Port
)
{
evtchn_close_t Close;
Close.port = Port;
return (UINT32)XenHypercallEventChannelOp (EVTCHNOP_close, &Close);
}
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