| 1 | /* $Id: VBoxMPVdma.cpp 108641 2025-03-20 12:48:42Z 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 | #include <iprt/asm.h>
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| 32 | #include <iprt/mem.h>
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| 33 |
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| 34 |
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| 35 | static DECLCALLBACK(void *) hgsmiEnvAlloc(void *pvEnv, HGSMISIZE cb)
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| 36 | {
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| 37 | NOREF(pvEnv);
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| 38 | return RTMemAlloc(cb);
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| 39 | }
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| 40 |
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| 41 | static DECLCALLBACK(void) hgsmiEnvFree(void *pvEnv, void *pv)
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| 42 | {
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| 43 | NOREF(pvEnv);
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| 44 | RTMemFree(pv);
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| 45 | }
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| 46 |
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| 47 | static HGSMIENV g_hgsmiEnvVdma =
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| 48 | {
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| 49 | NULL,
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| 50 | hgsmiEnvAlloc,
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| 51 | hgsmiEnvFree
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| 52 | };
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| 53 |
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| 54 | /* create a DMACommand buffer */
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| 55 | int vboxVdmaCreate(PVBOXMP_DEVEXT pDevExt, VBOXVDMAINFO *pInfo
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| 56 | )
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| 57 | {
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| 58 | RT_NOREF(pDevExt);
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| 59 | pInfo->fEnabled = FALSE;
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| 60 |
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| 61 | return VINF_SUCCESS;
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| 62 | }
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| 63 |
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| 64 | int vboxVdmaDisable (PVBOXMP_DEVEXT pDevExt, PVBOXVDMAINFO pInfo)
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| 65 | {
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| 66 | RT_NOREF(pDevExt);
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| 67 |
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| 68 | if (!pInfo->fEnabled)
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| 69 | return VINF_ALREADY_INITIALIZED;
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| 70 |
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| 71 | /* ensure nothing else is submitted */
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| 72 | pInfo->fEnabled = FALSE;
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| 73 | return VINF_SUCCESS;
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| 74 | }
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| 75 |
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| 76 | int vboxVdmaEnable (PVBOXMP_DEVEXT pDevExt, PVBOXVDMAINFO pInfo)
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| 77 | {
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| 78 | RT_NOREF(pDevExt);
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| 79 | Assert(!pInfo->fEnabled);
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| 80 | if (pInfo->fEnabled)
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| 81 | return VINF_ALREADY_INITIALIZED;
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| 82 | return VINF_SUCCESS;
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| 83 | }
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| 84 |
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| 85 | int vboxVdmaDestroy (PVBOXMP_DEVEXT pDevExt, PVBOXVDMAINFO pInfo)
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| 86 | {
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| 87 | int rc = VINF_SUCCESS;
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| 88 | Assert(!pInfo->fEnabled);
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| 89 | if (pInfo->fEnabled)
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| 90 | rc = vboxVdmaDisable (pDevExt, pInfo);
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| 91 | return rc;
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| 92 | }
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