| 1 | /* $Id: VBoxMPVdma.cpp 106061 2024-09-16 14:03:52Z vboxsync $ */
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| 2 | /** @file
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| 3 | * VBox WDDM Miniport driver
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2011-2024 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 "VBoxMPWddm.h"
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| 29 | #include "common/VBoxMPCommon.h"
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| 30 | #include "VBoxMPVdma.h"
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| 31 | #ifdef VBOX_WITH_VIDEOHWACCEL
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| 32 | #include "VBoxMPVhwa.h"
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| 33 | #endif
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| 34 | #include <iprt/asm.h>
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| 35 | #include <iprt/mem.h>
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| 36 |
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| 37 |
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| 38 | static DECLCALLBACK(void *) hgsmiEnvAlloc(void *pvEnv, HGSMISIZE cb)
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| 39 | {
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| 40 | NOREF(pvEnv);
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| 41 | return RTMemAlloc(cb);
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| 42 | }
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| 43 |
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| 44 | static DECLCALLBACK(void) hgsmiEnvFree(void *pvEnv, void *pv)
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| 45 | {
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| 46 | NOREF(pvEnv);
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| 47 | RTMemFree(pv);
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| 48 | }
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| 49 |
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| 50 | static HGSMIENV g_hgsmiEnvVdma =
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| 51 | {
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| 52 | NULL,
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| 53 | hgsmiEnvAlloc,
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| 54 | hgsmiEnvFree
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| 55 | };
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| 56 |
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| 57 | /* create a DMACommand buffer */
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| 58 | int vboxVdmaCreate(PVBOXMP_DEVEXT pDevExt, VBOXVDMAINFO *pInfo
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| 59 | )
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| 60 | {
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| 61 | RT_NOREF(pDevExt);
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| 62 | pInfo->fEnabled = FALSE;
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| 63 |
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| 64 | return VINF_SUCCESS;
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| 65 | }
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| 66 |
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| 67 | int vboxVdmaDisable (PVBOXMP_DEVEXT pDevExt, PVBOXVDMAINFO pInfo)
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| 68 | {
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| 69 | RT_NOREF(pDevExt);
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| 70 |
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| 71 | if (!pInfo->fEnabled)
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| 72 | return VINF_ALREADY_INITIALIZED;
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| 73 |
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| 74 | /* ensure nothing else is submitted */
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| 75 | pInfo->fEnabled = FALSE;
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| 76 | return VINF_SUCCESS;
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| 77 | }
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| 78 |
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| 79 | int vboxVdmaEnable (PVBOXMP_DEVEXT pDevExt, PVBOXVDMAINFO pInfo)
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| 80 | {
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| 81 | RT_NOREF(pDevExt);
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| 82 | Assert(!pInfo->fEnabled);
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| 83 | if (pInfo->fEnabled)
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| 84 | return VINF_ALREADY_INITIALIZED;
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| 85 | return VINF_SUCCESS;
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| 86 | }
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| 87 |
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| 88 | int vboxVdmaDestroy (PVBOXMP_DEVEXT pDevExt, PVBOXVDMAINFO pInfo)
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| 89 | {
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| 90 | int rc = VINF_SUCCESS;
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| 91 | Assert(!pInfo->fEnabled);
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| 92 | if (pInfo->fEnabled)
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| 93 | rc = vboxVdmaDisable (pDevExt, pInfo);
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| 94 | return rc;
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| 95 | }
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