| 1 | /** @file
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| 2 | *
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| 3 | * VBoxGuest -- VirtualBox Win 2000/XP guest video driver
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| 4 | *
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| 5 | * Display driver entry points.
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| 6 | *
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| 7 | * Copyright (C) 2006 InnoTek Systemberatung GmbH
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License as published by the Free Software Foundation,
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| 13 | * in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
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| 14 | * distribution. VirtualBox OSE is distributed in the hope that it will
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| 15 | * be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | *
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| 17 | * If you received this file as part of a commercial VirtualBox
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| 18 | * distribution, then only the terms of your commercial VirtualBox
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| 19 | * license agreement apply instead of the previous paragraph.
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| 20 | *
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| 21 | */
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| 22 |
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| 23 | #ifndef __VBOXIOCTL__H
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| 24 | #define __VBOXIOCTL__H
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| 25 |
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| 26 | #include <VBox/VBoxGuest.h>
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| 27 |
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| 28 | /** Called by the display driver when it is ready to
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| 29 | * switch to VBVA operation mode.
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| 30 | * Successful return means that VBVA can be used and
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| 31 | * output buffer contains VBVAENABLERESULT data.
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| 32 | * An error means that VBVA can not be used
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| 33 | * (disabled or not supported by the host).
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| 34 | */
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| 35 | #define IOCTL_VIDEO_VBVA_ENABLE \
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| 36 | CTL_CODE(FILE_DEVICE_VIDEO, 0x400, METHOD_BUFFERED, FILE_ANY_ACCESS)
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| 37 |
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| 38 | #pragma pack(1)
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| 39 | /**
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| 40 | * Data returned by IOCTL_VIDEO_VBVA_ENABLE.
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| 41 | *
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| 42 | */
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| 43 | typedef struct _VBVAENABLERESULT
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| 44 | {
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| 45 | /** Pointer to VBVAMemory part of VMMDev memory region. */
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| 46 | VBVAMEMORY *pVbvaMemory;
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| 47 |
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| 48 | /** Called to force the host to process VBVA memory,
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| 49 | * when there is no more free space in VBVA memory.
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| 50 | * Normally this never happens.
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| 51 | *
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| 52 | * The other purpose is to perform a synchronous command.
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| 53 | * But the goal is to have no such commands at all.
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| 54 | */
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| 55 | DECLCALLBACKMEMBER(void, pfnFlush) (void *pvFlush);
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| 56 |
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| 57 | /** Pointer required by the pfnFlush callback. */
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| 58 | void *pvFlush;
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| 59 |
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| 60 | } VBVAENABLERESULT;
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| 61 | #pragma pack()
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| 62 |
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| 63 | #endif /* __VBOXIOCTL__H */
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