79 lines
1.6 KiB
C
79 lines
1.6 KiB
C
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/** @file
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Event Channel function implementation.
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Event channel are use to notify of an event that happened in a shared
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structure for example.
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Copyright (C) 2014, Citrix Ltd.
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include "EventChannel.h"
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#include <Library/XenHypercallLib.h>
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UINT32
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XenEventChannelNotify (
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IN XENBUS_DEVICE *Dev,
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IN evtchn_port_t Port
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)
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{
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INTN ReturnCode;
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evtchn_send_t Send;
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Send.port = Port;
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ReturnCode = XenHypercallEventChannelOp (EVTCHNOP_send, &Send);
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return (UINT32)ReturnCode;
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}
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UINT32
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EFIAPI
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XenBusEventChannelAllocate (
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IN XENBUS_PROTOCOL *This,
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IN domid_t DomainId,
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OUT evtchn_port_t *Port
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)
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{
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evtchn_alloc_unbound_t Parameter;
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UINT32 ReturnCode;
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Parameter.dom = DOMID_SELF;
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Parameter.remote_dom = DomainId;
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ReturnCode = (UINT32)XenHypercallEventChannelOp (
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EVTCHNOP_alloc_unbound,
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&Parameter);
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if (ReturnCode != 0) {
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DEBUG ((EFI_D_ERROR, "ERROR: alloc_unbound failed with rc=%d", ReturnCode));
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return ReturnCode;
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}
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*Port = Parameter.port;
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return ReturnCode;
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}
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UINT32
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EFIAPI
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XenBusEventChannelNotify (
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IN XENBUS_PROTOCOL *This,
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IN evtchn_port_t Port
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)
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{
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XENBUS_PRIVATE_DATA *Private;
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Private = XENBUS_PRIVATE_DATA_FROM_THIS(This);
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return XenEventChannelNotify (Private->Dev, Port);
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}
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UINT32
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EFIAPI
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XenBusEventChannelClose (
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IN XENBUS_PROTOCOL *This,
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IN evtchn_port_t Port
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)
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{
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evtchn_close_t Close;
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Close.port = Port;
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return (UINT32)XenHypercallEventChannelOp (EVTCHNOP_close, &Close);
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}
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