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/* $Id: SHGSMIHost.cpp $ */
/** @file
* Missing description.
*/
/*
* Copyright (C) 2010-2019 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*/
#include "SHGSMIHost.h"
#include <VBoxVideo.h>
/*
* VBOXSHGSMI made on top HGSMI and allows receiving notifications
* about G->H command completion
*/
static int vboxSHGSMICommandCompleteAsynch (PHGSMIINSTANCE pIns, VBOXSHGSMIHEADER RT_UNTRUSTED_VOLATILE_GUEST *pHdr)
{
bool fDoIrq = !!(pHdr->fFlags & VBOXSHGSMI_FLAG_GH_ASYNCH_IRQ)
|| !!(pHdr->fFlags & VBOXSHGSMI_FLAG_GH_ASYNCH_IRQ_FORCE);
return HGSMICompleteGuestCommand(pIns, pHdr, fDoIrq);
}
void VBoxSHGSMICommandMarkAsynchCompletion(void RT_UNTRUSTED_VOLATILE_GUEST *pvData)
{
VBOXSHGSMIHEADER RT_UNTRUSTED_VOLATILE_GUEST *pHdr = VBoxSHGSMIBufferHeader(pvData);
Assert(!(pHdr->fFlags & VBOXSHGSMI_FLAG_HG_ASYNCH));
pHdr->fFlags |= VBOXSHGSMI_FLAG_HG_ASYNCH;
}
int VBoxSHGSMICommandComplete(PHGSMIINSTANCE pIns, void RT_UNTRUSTED_VOLATILE_GUEST *pvData)
{
VBOXSHGSMIHEADER RT_UNTRUSTED_VOLATILE_GUEST *pHdr = VBoxSHGSMIBufferHeader(pvData);
uint32_t fFlags = pHdr->fFlags;
ASMCompilerBarrier();
if ( !(fFlags & VBOXSHGSMI_FLAG_HG_ASYNCH) /* <- check if synchronous completion */
&& !(fFlags & VBOXSHGSMI_FLAG_GH_ASYNCH_FORCE)) /* <- check if can complete synchronously */
return VINF_SUCCESS;
pHdr->fFlags = fFlags | VBOXSHGSMI_FLAG_HG_ASYNCH;
return vboxSHGSMICommandCompleteAsynch(pIns, pHdr);
}
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