| 1 | /* $Id: SHGSMIHost.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */
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| 2 | /** @file
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| 3 | * Missing description.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2010-2023 Oracle and/or its affiliates.
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| 8 | *
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| 9 | * This file is part of VirtualBox base platform packages, as
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| 10 | * available from https://www.virtualbox.org.
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| 11 | *
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| 12 | * This program is free software; you can redistribute it and/or
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| 13 | * modify it under the terms of the GNU General Public License
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| 14 | * as published by the Free Software Foundation, in version 3 of the
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| 15 | * License.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful, but
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| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | * General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | *
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| 25 | * SPDX-License-Identifier: GPL-3.0-only
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| 26 | */
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| 27 |
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| 28 | #include "SHGSMIHost.h"
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| 29 | #include <VBoxVideo.h>
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| 30 |
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| 31 | /*
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| 32 | * VBOXSHGSMI made on top HGSMI and allows receiving notifications
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| 33 | * about G->H command completion
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| 34 | */
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| 35 |
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| 36 | static int vboxSHGSMICommandCompleteAsynch (PHGSMIINSTANCE pIns, VBOXSHGSMIHEADER RT_UNTRUSTED_VOLATILE_GUEST *pHdr)
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| 37 | {
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| 38 | bool fDoIrq = !!(pHdr->fFlags & VBOXSHGSMI_FLAG_GH_ASYNCH_IRQ)
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| 39 | || !!(pHdr->fFlags & VBOXSHGSMI_FLAG_GH_ASYNCH_IRQ_FORCE);
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| 40 | return HGSMICompleteGuestCommand(pIns, pHdr, fDoIrq);
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| 41 | }
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| 42 |
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| 43 | void VBoxSHGSMICommandMarkAsynchCompletion(void RT_UNTRUSTED_VOLATILE_GUEST *pvData)
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| 44 | {
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| 45 | VBOXSHGSMIHEADER RT_UNTRUSTED_VOLATILE_GUEST *pHdr = VBoxSHGSMIBufferHeader(pvData);
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| 46 | Assert(!(pHdr->fFlags & VBOXSHGSMI_FLAG_HG_ASYNCH));
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| 47 | pHdr->fFlags |= VBOXSHGSMI_FLAG_HG_ASYNCH;
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| 48 | }
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| 49 |
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| 50 | int VBoxSHGSMICommandComplete(PHGSMIINSTANCE pIns, void RT_UNTRUSTED_VOLATILE_GUEST *pvData)
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| 51 | {
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| 52 | VBOXSHGSMIHEADER RT_UNTRUSTED_VOLATILE_GUEST *pHdr = VBoxSHGSMIBufferHeader(pvData);
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| 53 | uint32_t fFlags = pHdr->fFlags;
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| 54 | ASMCompilerBarrier();
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| 55 | if ( !(fFlags & VBOXSHGSMI_FLAG_HG_ASYNCH) /* <- check if synchronous completion */
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| 56 | && !(fFlags & VBOXSHGSMI_FLAG_GH_ASYNCH_FORCE)) /* <- check if can complete synchronously */
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| 57 | return VINF_SUCCESS;
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| 58 |
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| 59 | pHdr->fFlags = fFlags | VBOXSHGSMI_FLAG_HG_ASYNCH;
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| 60 | return vboxSHGSMICommandCompleteAsynch(pIns, pHdr);
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| 61 | }
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