reactos/sdk/include/ddk/video.h

/*
 * video.h
 *
 * Video port and miniport driver interface
 *
 * This file is part of the w32api package.
 *
 * Contributors:
 *   Created by Casper S. Hornstrup <chorns@users.sourceforge.net>
 *
 * THIS SOFTWARE IS NOT COPYRIGHTED
 *
 * This source code is offered for use in the public domain. You may
 * use, modify or distribute it freely.
 *
 * This code is distributed in the hope that it will be useful but
 * WITHOUT ANY WARRANTY. ALL WARRANTIES, EXPRESS OR IMPLIED ARE HEREBY
 * DISCLAIMED. This includes but is not limited to warranties of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *
 */

#pragma once

#define __VIDEO_H__

#include "ntddvdeo.h"
#include "videoagp.h"

#ifdef __cplusplus
extern "C" {
#endif

#ifndef _NTOSDEF_

#ifdef PAGED_CODE
#undef PAGED_CODE
#endif

#if defined(_MSC_VER)
#define ALLOC_PRAGMA 1
#endif

#if defined(_VIDEOPORT_)
#define VPAPI
#else
#define VPAPI DECLSPEC_IMPORT
#endif

#if DBG
#define PAGED_CODE() \
  if (VideoPortGetCurrentIrql() > 1 /* APC_LEVEL */) { \
    VideoPortDebugPrint(Error, "Video: Pageable code called at IRQL %d\n", VideoPortGetCurrentIrql() ); \
    ASSERT(FALSE); \
  }
#else
#define PAGED_CODE()
#endif /* DBG */

ULONG
NTAPI
DriverEntry(
  PVOID Context1,
  PVOID Context2);

#else

#define VPAPI

#endif /* _NTOSDEF_ */

#if DBG
#define VideoDebugPrint(x) VideoPortDebugPrint x
#else
#define VideoDebugPrint(x)
#endif

#define GET_VIDEO_PHYSICAL_ADDRESS(scatterList,                        \
                                   VirtualAddress,                     \
                                   InputBuffer,                        \
                                   pLength,                            \
                                   Address)                            \
  do {                                                                 \
    ULONG_PTR byteOffset;                                              \
                                                                       \
    byteOffset = (PCHAR) VirtualAddress - (PCHAR)InputBuffer;          \
    while (byteOffset >= scatterList->Length) {                        \
      byteOffset -= scatterList->Length;                               \
      scatterList++;                                                   \
    }                                                                  \
    *pLength = scatterList->Length - byteOffset;                       \
    Address = (ULONG_PTR) (scatterList->PhysicalAddress + byteOffset); \
  } while (0)

#define GET_VIDEO_SCATTERGATHER(ppDma) (**(PVRB_SG **)ppDma)

/* VIDEO_ACCESS_RANGE.RangePassive */
#define VIDEO_RANGE_PASSIVE_DECODE        1
#define VIDEO_RANGE_10_BIT_DECODE         2

#define SIZE_OF_NT4_VIDEO_PORT_CONFIG_INFO FIELD_OFFSET(VIDEO_PORT_CONFIG_INFO, Master)
#define SIZE_OF_WXP_VIDEO_PORT_CONFIG_INFO sizeof(VIDEO_PORT_CONFIG_INFO)

#define SET_USER_EVENT    0x01
#define SET_DISPLAY_EVENT 0x02

#define EVENT_TYPE_MASK                   1
#define SYNCHRONIZATION_EVENT             0
#define NOTIFICATION_EVENT                1

#define INITIAL_EVENT_STATE_MASK          2
#define INITIAL_EVENT_NOT_SIGNALED        0
#define INITIAL_EVENT_SIGNALED            2

#define DISPLAY_ADAPTER_HW_ID             0xFFFFFFFF

#define VIDEO_INVALID_CHILD_ID            0xFFFFFFFF

#define SIZE_OF_NT4_VIDEO_HW_INITIALIZATION_DATA FIELD_OFFSET(VIDEO_HW_INITIALIZATION_DATA, HwStartDma)
#define SIZE_OF_W2K_VIDEO_HW_INITIALIZATION_DATA FIELD_OFFSET(VIDEO_HW_INITIALIZATION_DATA, Reserved)
#define SIZE_OF_WXP_VIDEO_HW_INITIALIZATION_DATA (SIZE_OF_W2K_VIDEO_HW_INITIALIZATION_DATA + sizeof(ULONG))

#define VIDEO_PORT_AGP_INTERFACE_VERSION_1                 1
#define VIDEO_PORT_AGP_INTERFACE_VERSION_2                 2
#define VIDEO_PORT_I2C_INTERFACE_VERSION_1                 1
#define VIDEO_PORT_I2C_INTERFACE_VERSION_2                 2
#define VIDEO_PORT_INT10_INTERFACE_VERSION_1               1
#define VIDEO_PORT_WCMEMORYPROTECTION_INTERFACE_VERSION_1  1
#define VIDEO_PORT_DEBUG_REPORT_INTERFACE_VERSION_1        1

/* Flags for VideoPortGetDeviceBase and VideoPortMapMemory */
#define VIDEO_MEMORY_SPACE_MEMORY         0x00
#define VIDEO_MEMORY_SPACE_IO             0x01
#define VIDEO_MEMORY_SPACE_USER_MODE      0x02
#define VIDEO_MEMORY_SPACE_DENSE          0x04
#define VIDEO_MEMORY_SPACE_P6CACHE        0x08

/* PVIDEO_HW_GET_CHILD_DESCRIPTOR return values */
#define VIDEO_ENUM_MORE_DEVICES           ERROR_CONTINUE
#define VIDEO_ENUM_NO_MORE_DEVICES        ERROR_NO_MORE_DEVICES
#define VIDEO_ENUM_INVALID_DEVICE         ERROR_INVALID_NAME

#define DEVICE_VGA_ENABLED                1

/* VideoPortCheckForDeviceExistence.Flags constants */
#define CDE_USE_SUBSYSTEM_IDS             0x00000001
#define CDE_USE_REVISION                  0x00000002

#define BUGCHECK_DATA_SIZE_RESERVED       48

#define VIDEO_DEBUG_REPORT_MAX_SIZE       0x8000

typedef LONG VP_STATUS, *PVP_STATUS;
typedef ULONG DMA_EVENT_FLAGS;

typedef struct _VIDEO_PORT_SPIN_LOCK *PSPIN_LOCK;
typedef struct _VIDEO_DEBUG_REPORT *PVIDEO_DEBUG_REPORT;
typedef struct __DMA_PARAMETERS *PDMA;
typedef struct __VP_DMA_ADAPTER *PVP_DMA_ADAPTER;

typedef PVOID
(NTAPI *PVIDEO_PORT_GET_PROC_ADDRESS)(
  IN PVOID HwDeviceExtension,
  IN PUCHAR FunctionName);

typedef struct _VIDEO_PORT_CONFIG_INFO {
  ULONG Length;
  ULONG SystemIoBusNumber;
  INTERFACE_TYPE AdapterInterfaceType;
  ULONG BusInterruptLevel;
  ULONG BusInterruptVector;
  KINTERRUPT_MODE InterruptMode;
  ULONG NumEmulatorAccessEntries;
  PEMULATOR_ACCESS_ENTRY EmulatorAccessEntries;
  ULONG_PTR EmulatorAccessEntriesContext;
  PHYSICAL_ADDRESS VdmPhysicalVideoMemoryAddress;
  ULONG VdmPhysicalVideoMemoryLength;
  ULONG HardwareStateSize;
  ULONG DmaChannel;
  ULONG DmaPort;
  UCHAR DmaShareable;
  UCHAR InterruptShareable;
  BOOLEAN Master;
  DMA_WIDTH DmaWidth;
  DMA_SPEED DmaSpeed;
  BOOLEAN bMapBuffers;
  BOOLEAN NeedPhysicalAddresses;
  BOOLEAN DemandMode;
  ULONG MaximumTransferLength;
  ULONG NumberOfPhysicalBreaks;
  BOOLEAN ScatterGather;
  ULONG MaximumScatterGatherChunkSize;
  PVIDEO_PORT_GET_PROC_ADDRESS VideoPortGetProcAddress;
  PWSTR DriverRegistryPath;
  ULONGLONG SystemMemorySize;
} VIDEO_PORT_CONFIG_INFO, *PVIDEO_PORT_CONFIG_INFO;

typedef VP_STATUS
(NTAPI *PVIDEO_HW_FIND_ADAPTER)(
  IN PVOID HwDeviceExtension,
  IN PVOID HwContext,
  IN PWSTR ArgumentString,
  IN OUT PVIDEO_PORT_CONFIG_INFO ConfigInfo,
  OUT PUCHAR Again);

typedef BOOLEAN
(NTAPI *PVIDEO_HW_INITIALIZE)(
  IN PVOID HwDeviceExtension);

typedef BOOLEAN
(NTAPI *PVIDEO_HW_INTERRUPT)(
  IN PVOID HwDeviceExtension);

typedef struct _VIDEO_ACCESS_RANGE {
  PHYSICAL_ADDRESS RangeStart;
  ULONG RangeLength;
  UCHAR RangeInIoSpace;
  UCHAR RangeVisible;
  UCHAR RangeShareable;
  UCHAR RangePassive;
} VIDEO_ACCESS_RANGE, *PVIDEO_ACCESS_RANGE;

typedef VOID
(NTAPI *PVIDEO_HW_LEGACYRESOURCES)(
  IN ULONG VendorId,
  IN ULONG DeviceId,
  IN OUT PVIDEO_ACCESS_RANGE *LegacyResourceList,
  IN OUT PULONG LegacyResourceCount);

typedef enum _HW_DMA_RETURN {
  DmaAsyncReturn,
  DmaSyncReturn
} HW_DMA_RETURN, *PHW_DMA_RETURN;

typedef HW_DMA_RETURN
(NTAPI *PVIDEO_HW_START_DMA)(
  PVOID HwDeviceExtension,
  PDMA pDma);

typedef struct _VP_SCATTER_GATHER_ELEMENT {
  PHYSICAL_ADDRESS Address;
  ULONG Length;
  ULONG_PTR Reserved;
} VP_SCATTER_GATHER_ELEMENT, *PVP_SCATTER_GATHER_ELEMENT;

typedef struct _VP_SCATTER_GATHER_LIST {
  ULONG NumberOfElements;
  ULONG_PTR Reserved;
  VP_SCATTER_GATHER_ELEMENT Elements[0];
} VP_SCATTER_GATHER_LIST, *PVP_SCATTER_GATHER_LIST;

typedef VOID
(NTAPI *PEXECUTE_DMA)(
  IN PVOID HwDeviceExtension,
  IN PVP_DMA_ADAPTER VpDmaAdapter,
  IN PVP_SCATTER_GATHER_LIST SGList,
  IN PVOID Context);

/* PVIDEO_HW_GET_CHILD_DESCRIPTOR.ChildEnumInfo constants */
typedef struct _VIDEO_CHILD_ENUM_INFO {
  ULONG Size;
  ULONG ChildDescriptorSize;
  ULONG ChildIndex;
  ULONG ACPIHwId;
  PVOID ChildHwDeviceExtension;
} VIDEO_CHILD_ENUM_INFO, *PVIDEO_CHILD_ENUM_INFO;

/* PVIDEO_HW_GET_CHILD_DESCRIPTOR.VideoChildType constants */
typedef enum _VIDEO_CHILD_TYPE {
  Monitor = 1,
  NonPrimaryChip,
  VideoChip,
  Other
} VIDEO_CHILD_TYPE, *PVIDEO_CHILD_TYPE;

typedef VP_STATUS
(NTAPI *PVIDEO_HW_GET_CHILD_DESCRIPTOR)(
  IN PVOID HwDeviceExtension,
  IN PVIDEO_CHILD_ENUM_INFO ChildEnumInfo,
  OUT PVIDEO_CHILD_TYPE VideoChildType,
  OUT PUCHAR pChildDescriptor,
  OUT PULONG UId,
  OUT PULONG pUnused);

typedef VP_STATUS
(NTAPI *PVIDEO_HW_POWER_SET)(
  IN PVOID HwDeviceExtension,
  IN ULONG HwId,
  IN PVIDEO_POWER_MANAGEMENT VideoPowerControl);

typedef VP_STATUS
(NTAPI *PVIDEO_HW_POWER_GET)(
  IN PVOID HwDeviceExtension,
  IN ULONG HwId,
  IN OUT PVIDEO_POWER_MANAGEMENT VideoPowerControl);

typedef struct _QUERY_INTERFACE {
  CONST GUID *InterfaceType;
  USHORT Size;
  USHORT Version;
  PINTERFACE Interface;
  PVOID InterfaceSpecificData;
} QUERY_INTERFACE, *PQUERY_INTERFACE;

typedef VP_STATUS
(NTAPI *PVIDEO_HW_QUERY_INTERFACE)(
  IN PVOID HwDeviceExtension,
  IN OUT PQUERY_INTERFACE QueryInterface);

typedef VP_STATUS
(NTAPI *PVIDEO_HW_CHILD_CALLBACK)(
  PVOID HwDeviceExtension,
  PVOID ChildDeviceExtension);

typedef BOOLEAN
(NTAPI *PVIDEO_HW_RESET_HW)(
  IN PVOID HwDeviceExtension,
  IN ULONG Columns,
  IN ULONG Rows);

typedef struct _STATUS_BLOCK {
  _ANONYMOUS_UNION union {
    VP_STATUS Status;
    PVOID Pointer;
  } DUMMYUNIONNAME;
  ULONG_PTR Information;
} STATUS_BLOCK, *PSTATUS_BLOCK;

typedef struct _VIDEO_REQUEST_PACKET {
  ULONG IoControlCode;
  PSTATUS_BLOCK StatusBlock;
  PVOID InputBuffer;
  ULONG InputBufferLength;
  PVOID OutputBuffer;
  ULONG OutputBufferLength;
} VIDEO_REQUEST_PACKET, *PVIDEO_REQUEST_PACKET;

typedef BOOLEAN
(NTAPI *PVIDEO_HW_START_IO)(
  IN PVOID HwDeviceExtension,
  IN PVIDEO_REQUEST_PACKET RequestPacket);

typedef VOID
(NTAPI *PVIDEO_HW_TIMER)(
  IN PVOID HwDeviceExtension);

typedef VOID
(NTAPI *PVIDEO_WRITE_CLOCK_LINE)(
  PVOID HwDeviceExtension,
  UCHAR Data);

typedef VOID
(NTAPI *PVIDEO_WRITE_DATA_LINE)(
  PVOID HwDeviceExtension,
  UCHAR Data);

typedef BOOLEAN
(NTAPI *PVIDEO_READ_CLOCK_LINE)(
  PVOID HwDeviceExtension);

typedef BOOLEAN
(NTAPI *PVIDEO_READ_DATA_LINE)(
  PVOID HwDeviceExtension);

typedef VOID
(NTAPI *PVIDEO_WAIT_VSYNC_ACTIVE)(
  PVOID HwDeviceExtension);

typedef struct _I2C_CALLBACKS {
  IN PVIDEO_WRITE_CLOCK_LINE WriteClockLine;
  IN PVIDEO_WRITE_DATA_LINE WriteDataLine;
  IN PVIDEO_READ_CLOCK_LINE ReadClockLine;
  IN PVIDEO_READ_DATA_LINE ReadDataLine;
} I2C_CALLBACKS, *PI2C_CALLBACKS;

typedef BOOLEAN
(NTAPI *PI2C_START)(
  IN PVOID HwDeviceExtension,
  IN PI2C_CALLBACKS I2CCallbacks);

typedef BOOLEAN
(NTAPI *PI2C_STOP)(
  IN PVOID HwDeviceExtension,
  IN PI2C_CALLBACKS I2CCallbacks);

typedef BOOLEAN
(NTAPI *PI2C_WRITE)(
  IN PVOID HwDeviceExtension,
  IN PI2C_CALLBACKS I2CCallbacks,
  IN PUCHAR Buffer,
  IN ULONG Length);

typedef BOOLEAN
(NTAPI *PI2C_READ)(
  IN PVOID HwDeviceExtension,
  IN PI2C_CALLBACKS I2CCallbacks,
  OUT PUCHAR Buffer,
  IN ULONG Length);

typedef struct _VIDEO_I2C_CONTROL {
  IN PVIDEO_WRITE_CLOCK_LINE WriteClockLine;
  IN PVIDEO_WRITE_DATA_LINE WriteDataLine;
  IN PVIDEO_READ_CLOCK_LINE ReadClockLine;
  IN PVIDEO_READ_DATA_LINE ReadDataLine;
  IN ULONG I2CDelay;
} VIDEO_I2C_CONTROL, *PVIDEO_I2C_CONTROL;

typedef BOOLEAN
(NTAPI *PI2C_START_2)(
  IN PVOID HwDeviceExtension,
  IN PVIDEO_I2C_CONTROL I2CControl);

typedef BOOLEAN
(NTAPI *PI2C_STOP_2)(
  IN PVOID HwDeviceExtension,
  IN PVIDEO_I2C_CONTROL I2CControl);

typedef BOOLEAN
(NTAPI *PI2C_WRITE_2)(
  IN PVOID HwDeviceExtension,
  IN PVIDEO_I2C_CONTROL I2CControl,
  IN PUCHAR Buffer,
  IN ULONG Length);

typedef BOOLEAN
(NTAPI *PI2C_READ_2)(
  IN PVOID HwDeviceExtension,
  IN PVIDEO_I2C_CONTROL I2CControl,
  OUT PUCHAR Buffer,
  IN ULONG Length,
  IN BOOLEAN EndOfRead);

typedef struct _INT10_BIOS_ARGUMENTS {
  ULONG Eax;
  ULONG Ebx;
  ULONG Ecx;
  ULONG Edx;
  ULONG Esi;
  ULONG Edi;
  ULONG Ebp;
  USHORT SegDs;
  USHORT SegEs;
} INT10_BIOS_ARGUMENTS, *PINT10_BIOS_ARGUMENTS;

typedef VP_STATUS
(NTAPI *PINT10_CALL_BIOS)(
  IN PVOID Context,
  IN OUT PINT10_BIOS_ARGUMENTS BiosArguments);

typedef VP_STATUS
(NTAPI *PINT10_ALLOCATE_BUFFER)(
  IN PVOID Context,
  OUT PUSHORT Seg,
  OUT PUSHORT Off,
  IN OUT PULONG Length);

typedef VP_STATUS
(NTAPI *PINT10_FREE_BUFFER)(
  IN PVOID Context,
  IN USHORT Seg,
  IN USHORT Off);

typedef VP_STATUS
(NTAPI *PINT10_READ_MEMORY)(
  IN PVOID Context,
  IN USHORT Seg,
  IN USHORT Off,
  OUT PVOID Buffer,
  IN ULONG Length);

typedef VP_STATUS
(NTAPI *PINT10_WRITE_MEMORY)(
  IN PVOID Context,
  IN USHORT Seg,
  IN USHORT Off,
  IN PVOID Buffer,
  IN ULONG Length);

typedef VP_STATUS
(NTAPI *PROTECT_WC_MEMORY)(
  IN PVOID Context,
  IN PVOID HwDeviceExtension);

typedef VP_STATUS
(NTAPI *RESTORE_WC_MEMORY)(
  IN PVOID Context,
  IN PVOID HwDeviceExtension);

typedef enum _VIDEO_DEVICE_DATA_TYPE {
  VpMachineData = 0,
  VpCmosData,
  VpBusData,
  VpControllerData,
  VpMonitorData
} VIDEO_DEVICE_DATA_TYPE, *PVIDEO_DEVICE_DATA_TYPE;

typedef VP_STATUS
(NTAPI *PMINIPORT_QUERY_DEVICE_ROUTINE)(
  IN PVOID HwDeviceExtension,
  IN PVOID Context,
  IN VIDEO_DEVICE_DATA_TYPE DeviceDataType,
  IN PVOID Identifier,
  IN ULONG IdentifierLength,
  IN PVOID ConfigurationData,
  IN ULONG ConfigurationDataLength,
  IN OUT PVOID ComponentInformation,
  IN ULONG ComponentInformationLength);

typedef VP_STATUS
(NTAPI *PMINIPORT_GET_REGISTRY_ROUTINE)(
  IN PVOID HwDeviceExtension,
  IN PVOID Context,
  IN OUT PWSTR ValueName,
  IN OUT PVOID ValueData,
  IN ULONG ValueLength);

typedef VOID
(NTAPI *PMINIPORT_DPC_ROUTINE)(
  IN PVOID HwDeviceExtension,
  IN PVOID Context);

typedef BOOLEAN
(NTAPI *PMINIPORT_SYNCHRONIZE_ROUTINE)(
  IN PVOID Context);

typedef VOID
(NTAPI *PVIDEO_BUGCHECK_CALLBACK)(
  IN PVOID HwDeviceExtension,
  IN ULONG BugcheckCode,
  IN PUCHAR Buffer,
  IN ULONG BufferSize);

/* VideoPortSynchronizeExecution.Priority constants */
typedef enum VIDEO_SYNCHRONIZE_PRIORITY {
  VpLowPriority = 0,
  VpMediumPriority,
  VpHighPriority
} VIDEO_SYNCHRONIZE_PRIORITY, *PVIDEO_SYNCHRONIZE_PRIORITY;

/* VideoPortAllocatePool.PoolType constants */
typedef enum _VP_POOL_TYPE {
  VpNonPagedPool = 0,
  VpPagedPool,
  VpNonPagedPoolCacheAligned = 4,
  VpPagedPoolCacheAligned
} VP_POOL_TYPE, *PVP_POOL_TYPE;

typedef enum _DMA_FLAGS {
  VideoPortUnlockAfterDma = 1,
  VideoPortKeepPagesLocked,
  VideoPortDmaInitOnly
} DMA_FLAGS;

/*
 * Data returned with VpControllerData.
 *
 * The first two fields, InterfaceType and BusNumber, are common
 * with the CM_FULL_RESOURCE_DESCRIPTOR header.
 * The other fields are of legacy layout, instead of the newer
 * CM_PARTIAL_RESOURCE_LIST one.
 */
typedef struct _VIDEO_HARDWARE_CONFIGURATION_DATA {
  INTERFACE_TYPE InterfaceType;
  ULONG BusNumber;
  USHORT Version;
  USHORT Revision;
  USHORT Irql;
  USHORT Vector;
  ULONG ControlBase;
  ULONG ControlSize;
  ULONG CursorBase;
  ULONG CursorSize;
  ULONG FrameBase;
  ULONG FrameSize;
} VIDEO_HARDWARE_CONFIGURATION_DATA, *PVIDEO_HARDWARE_CONFIGURATION_DATA;

typedef struct _VIDEO_X86_BIOS_ARGUMENTS {
  ULONG Eax;
  ULONG Ebx;
  ULONG Ecx;
  ULONG Edx;
  ULONG Esi;
  ULONG Edi;
  ULONG Ebp;
} VIDEO_X86_BIOS_ARGUMENTS, *PVIDEO_X86_BIOS_ARGUMENTS;

typedef enum VIDEO_DEBUG_LEVEL {
  Error = 0,
  Warn,
  Trace,
  Info
} VIDEO_DEBUG_LEVEL, *PVIDEO_DEBUG_LEVEL;

#ifndef _NTOS_

typedef VP_STATUS
(NTAPI *PDRIVER_IO_PORT_UCHAR)(
  IN ULONG_PTR Context,
  IN ULONG Port,
  IN UCHAR AccessMode,
  IN PUCHAR Data);

typedef VP_STATUS
(NTAPI *PDRIVER_IO_PORT_UCHAR_STRING)(
  IN ULONG_PTR Context,
  IN ULONG Port,
  IN UCHAR AccessMode,
  IN PUCHAR Data,
  IN ULONG DataLength);

typedef VP_STATUS
(NTAPI *PDRIVER_IO_PORT_ULONG)(
  IN ULONG_PTR Context,
  IN ULONG Port,
  IN UCHAR AccessMode,
  IN PULONG Data);

typedef VP_STATUS
(NTAPI *PDRIVER_IO_PORT_ULONG_STRING)(
  IN ULONG_PTR Context,
  IN ULONG Port,
  IN UCHAR AccessMode,
  IN PULONG Data,
  IN ULONG DataLength);

typedef VP_STATUS
(NTAPI *PDRIVER_IO_PORT_USHORT)(
  IN ULONG_PTR Context,
  IN ULONG Port,
  IN UCHAR AccessMode,
  IN PUSHORT Data);

typedef VP_STATUS
(NTAPI *PDRIVER_IO_PORT_USHORT_STRING)(
  IN ULONG_PTR Context,
  IN ULONG Port,
  IN UCHAR AccessMode,
  IN PUSHORT Data,
  IN ULONG DataLength);

#endif /* _NTOS_ */

typedef struct __VRB_SG {
  __int64 PhysicalAddress;
  ULONG Length;
} VRB_SG, *PVRB_SG;

typedef enum _VP_LOCK_OPERATION {
  VpReadAccess = 0,
  VpWriteAccess,
  VpModifyAccess
} VP_LOCK_OPERATION;

typedef struct _VP_DEVICE_DESCRIPTION {
  BOOLEAN ScatterGather;
  BOOLEAN Dma32BitAddresses;
  BOOLEAN Dma64BitAddresses;
  ULONG MaximumLength;
} VP_DEVICE_DESCRIPTION, *PVP_DEVICE_DESCRIPTION;

typedef struct _VIDEO_CHILD_STATE {
  ULONG Id;
  ULONG State;
} VIDEO_CHILD_STATE, *PVIDEO_CHILD_STATE;

typedef struct _VIDEO_CHILD_STATE_CONFIGURATION {
  ULONG Count;
  VIDEO_CHILD_STATE ChildStateArray[ANYSIZE_ARRAY];
} VIDEO_CHILD_STATE_CONFIGURATION, *PVIDEO_CHILD_STATE_CONFIGURATION;

typedef struct _VIDEO_HW_INITIALIZATION_DATA {
  ULONG HwInitDataSize;
  INTERFACE_TYPE AdapterInterfaceType;
  PVIDEO_HW_FIND_ADAPTER HwFindAdapter;
  PVIDEO_HW_INITIALIZE HwInitialize;
  PVIDEO_HW_INTERRUPT HwInterrupt;
  PVIDEO_HW_START_IO HwStartIO;
  ULONG HwDeviceExtensionSize;
  ULONG StartingDeviceNumber;
  PVIDEO_HW_RESET_HW HwResetHw;
  PVIDEO_HW_TIMER HwTimer;
  PVIDEO_HW_START_DMA HwStartDma;
  PVIDEO_HW_POWER_SET HwSetPowerState;
  PVIDEO_HW_POWER_GET HwGetPowerState;
  PVIDEO_HW_GET_CHILD_DESCRIPTOR HwGetVideoChildDescriptor;
  PVIDEO_HW_QUERY_INTERFACE HwQueryInterface;
  ULONG HwChildDeviceExtensionSize;
  PVIDEO_ACCESS_RANGE HwLegacyResourceList;
  ULONG HwLegacyResourceCount;
  PVIDEO_HW_LEGACYRESOURCES HwGetLegacyResources;
  BOOLEAN AllowEarlyEnumeration;
  ULONG Reserved;
} VIDEO_HW_INITIALIZATION_DATA, *PVIDEO_HW_INITIALIZATION_DATA;

typedef struct _I2C_FNC_TABLE {
  IN ULONG Size;
  IN PVIDEO_WRITE_CLOCK_LINE WriteClockLine;
  IN PVIDEO_WRITE_DATA_LINE WriteDataLine;
  IN PVIDEO_READ_CLOCK_LINE ReadClockLine;
  IN PVIDEO_READ_DATA_LINE ReadDataLine;
  IN PVIDEO_WAIT_VSYNC_ACTIVE WaitVsync;
  PVOID Reserved;
} I2C_FNC_TABLE, *PI2C_FNC_TABLE;

typedef struct _DDC_CONTROL {
  IN ULONG Size;
  IN I2C_CALLBACKS I2CCallbacks;
  IN UCHAR EdidSegment;
} DDC_CONTROL, *PDDC_CONTROL;

/* VideoPortQueryServices.ServicesType constants */
typedef enum _VIDEO_PORT_SERVICES {
  VideoPortServicesAGP = 1,
  VideoPortServicesI2C,
  VideoPortServicesHeadless,
  VideoPortServicesInt10,
  VideoPortServicesDebugReport,
  VideoPortServicesWCMemoryProtection
} VIDEO_PORT_SERVICES;

typedef struct _VIDEO_PORT_AGP_INTERFACE {
  SHORT Size;
  SHORT Version;
  PVOID Context;
  PINTERFACE_REFERENCE InterfaceReference;
  PINTERFACE_DEREFERENCE InterfaceDereference;
  PAGP_RESERVE_PHYSICAL AgpReservePhysical;
  PAGP_RELEASE_PHYSICAL AgpReleasePhysical;
  PAGP_COMMIT_PHYSICAL AgpCommitPhysical;
  PAGP_FREE_PHYSICAL AgpFreePhysical;
  PAGP_RESERVE_VIRTUAL AgpReserveVirtual;
  PAGP_RELEASE_VIRTUAL AgpReleaseVirtual;
  PAGP_COMMIT_VIRTUAL AgpCommitVirtual;
  PAGP_FREE_VIRTUAL AgpFreeVirtual;
  ULONGLONG AgpAllocationLimit;
} VIDEO_PORT_AGP_INTERFACE, *PVIDEO_PORT_AGP_INTERFACE;

typedef struct _VIDEO_PORT_AGP_INTERFACE_2 {
  IN USHORT Size;
  IN USHORT Version;
  OUT PVOID Context;
  OUT PINTERFACE_REFERENCE InterfaceReference;
  OUT PINTERFACE_DEREFERENCE InterfaceDereference;
  OUT PAGP_RESERVE_PHYSICAL AgpReservePhysical;
  OUT PAGP_RELEASE_PHYSICAL AgpReleasePhysical;
  OUT PAGP_COMMIT_PHYSICAL AgpCommitPhysical;
  OUT PAGP_FREE_PHYSICAL AgpFreePhysical;
  OUT PAGP_RESERVE_VIRTUAL AgpReserveVirtual;
  OUT PAGP_RELEASE_VIRTUAL AgpReleaseVirtual;
  OUT PAGP_COMMIT_VIRTUAL AgpCommitVirtual;
  OUT PAGP_FREE_VIRTUAL AgpFreeVirtual;
  OUT ULONGLONG AgpAllocationLimit;
  OUT PAGP_SET_RATE AgpSetRate;
} VIDEO_PORT_AGP_INTERFACE_2, *PVIDEO_PORT_AGP_INTERFACE_2;

typedef struct _VIDEO_PORT_I2C_INTERFACE {
  USHORT Size;
  USHORT Version;
  PVOID Context;
  PINTERFACE_REFERENCE InterfaceReference;
  PINTERFACE_DEREFERENCE InterfaceDereference;
  PI2C_START I2CStart;
  PI2C_STOP I2CStop;
  PI2C_WRITE I2CWrite;
  PI2C_READ I2CRead;
} VIDEO_PORT_I2C_INTERFACE, *PVIDEO_PORT_I2C_INTERFACE;

typedef struct _VIDEO_PORT_I2C_INTERFACE_2 {
  IN USHORT Size;
  IN USHORT Version;
  OUT PVOID Context;
  OUT PINTERFACE_REFERENCE InterfaceReference;
  OUT PINTERFACE_DEREFERENCE InterfaceDereference;
  OUT PI2C_START_2 I2CStart;
  OUT PI2C_STOP_2 I2CStop;
  OUT PI2C_WRITE_2 I2CWrite;
  OUT PI2C_READ_2 I2CRead;
} VIDEO_PORT_I2C_INTERFACE_2, *PVIDEO_PORT_I2C_INTERFACE_2;

typedef struct _VIDEO_PORT_INT10_INTERFACE {
  IN USHORT Size;
  IN USHORT Version;
  OUT PVOID Context;
  OUT PINTERFACE_REFERENCE InterfaceReference;
  OUT PINTERFACE_DEREFERENCE InterfaceDereference;
  OUT PINT10_ALLOCATE_BUFFER Int10AllocateBuffer;
  OUT PINT10_FREE_BUFFER Int10FreeBuffer;
  OUT PINT10_READ_MEMORY Int10ReadMemory;
  OUT PINT10_WRITE_MEMORY Int10WriteMemory;
  OUT PINT10_CALL_BIOS Int10CallBios;
} VIDEO_PORT_INT10_INTERFACE, *PVIDEO_PORT_INT10_INTERFACE;

typedef struct _VIDEO_PORT_WCMEMORYPROTECTION_INTERFACE {
  IN USHORT Size;
  IN USHORT Version;
  OUT PVOID Context;
  OUT PINTERFACE_REFERENCE InterfaceReference;
  OUT PINTERFACE_DEREFERENCE InterfaceDereference;
  OUT PROTECT_WC_MEMORY VideoPortProtectWCMemory;
  OUT RESTORE_WC_MEMORY VideoPortRestoreWCMemory;
} VIDEO_PORT_WCMEMORYPROTECTION_INTERFACE, *PVIDEO_PORT_WCMEMORYPROTECTION_INTERFACE;

typedef struct _VPOSVERSIONINFO {
  IN ULONG Size;
  OUT ULONG MajorVersion;
  OUT ULONG MinorVersion;
  OUT ULONG BuildNumber;
  OUT USHORT ServicePackMajor;
  OUT USHORT ServicePackMinor;
} VPOSVERSIONINFO, *PVPOSVERSIONINFO;

typedef struct _VIDEO_PORT_DEBUG_REPORT_INTERFACE {
  IN USHORT Size;
  IN USHORT Version;
  OUT PVOID Context;
  OUT PINTERFACE_REFERENCE InterfaceReference;
  OUT PINTERFACE_DEREFERENCE InterfaceDereference;
  OUT PVIDEO_DEBUG_REPORT (*DbgReportCreate)(
    IN PVOID HwDeviceExtension,
    IN ULONG ulCode,
    IN ULONG_PTR ulpArg1,
    IN ULONG_PTR ulpArg2,
    IN ULONG_PTR ulpArg3,
    IN ULONG_PTR ulpArg4
  );
  OUT BOOLEAN (*DbgReportSecondaryData)(
    IN OUT PVIDEO_DEBUG_REPORT pReport,
    IN PVOID pvData,
    IN ULONG ulDataSize
  );
  OUT VOID (*DbgReportComplete)(
    IN OUT PVIDEO_DEBUG_REPORT pReport
  );
} VIDEO_PORT_DEBUG_REPORT_INTERFACE, *PVIDEO_PORT_DEBUG_REPORT_INTERFACE;

/* Video port functions for miniports */

VPAPI
VP_STATUS
NTAPI
VideoPortAllocateBuffer(
  IN PVOID HwDeviceExtension,
  IN ULONG Size,
  OUT PVOID *Buffer);

VPAPI
VOID
NTAPI
VideoPortAcquireDeviceLock(
  IN PVOID HwDeviceExtension);

VPAPI
ULONG
NTAPI
VideoPortCompareMemory(
  IN PVOID Source1,
  IN PVOID Source2,
  IN SIZE_T Length);

VPAPI
BOOLEAN
NTAPI
VideoPortDDCMonitorHelper(
  IN PVOID HwDeviceExtension,
  IN PVOID DDCControl,
  IN OUT PUCHAR EdidBuffer,
  IN ULONG EdidBufferSize);

VPAPI
VOID
__cdecl
VideoPortDebugPrint(
    _In_ VIDEO_DEBUG_LEVEL DebugPrintLevel,
    _In_ PSTR DebugMessage,
    _In_ ...);

VPAPI
VP_STATUS
NTAPI
VideoPortDisableInterrupt(
  IN PVOID HwDeviceExtension);

VPAPI
VP_STATUS
NTAPI
VideoPortEnableInterrupt(
  IN PVOID HwDeviceExtension);

VPAPI
VP_STATUS
NTAPI
VideoPortEnumerateChildren(
  IN PVOID HwDeviceExtension,
  IN PVOID Reserved);

VPAPI
VOID
NTAPI
VideoPortFreeDeviceBase(
  IN PVOID HwDeviceExtension,
  IN PVOID MappedAddress);

VPAPI
VP_STATUS
NTAPI
VideoPortGetAccessRanges(
    _In_ PVOID HwDeviceExtension,
    _In_opt_ ULONG NumRequestedResources,
    _In_reads_opt_(NumRequestedResources)
        PIO_RESOURCE_DESCRIPTOR RequestedResources,
    _In_ ULONG NumAccessRanges,
    _Out_writes_(NumAccessRanges) PVIDEO_ACCESS_RANGE AccessRanges,
    _In_ PVOID VendorId,
    _In_ PVOID DeviceId,
    _Out_ PULONG Slot);

VPAPI
PVOID
NTAPI
VideoPortGetAssociatedDeviceExtension(
  IN PVOID DeviceObject);

VPAPI
ULONG
NTAPI
VideoPortGetBusData(
  IN PVOID HwDeviceExtension,
  IN BUS_DATA_TYPE BusDataType,
  IN ULONG SlotNumber,
  IN OUT PVOID Buffer,
  IN ULONG Offset,
  IN ULONG Length);

VPAPI
UCHAR
NTAPI
VideoPortGetCurrentIrql(VOID);

VPAPI
PVOID
NTAPI
VideoPortGetDeviceBase(
  IN PVOID HwDeviceExtension,
  IN PHYSICAL_ADDRESS IoAddress,
  IN ULONG NumberOfUchars,
  IN UCHAR InIoSpace);

VPAPI
VP_STATUS
NTAPI
VideoPortGetDeviceData(
  IN PVOID HwDeviceExtension,
  IN VIDEO_DEVICE_DATA_TYPE DeviceDataType,
  IN PMINIPORT_QUERY_DEVICE_ROUTINE CallbackRoutine,
  IN PVOID Context);

VPAPI
VP_STATUS
NTAPI
VideoPortGetRegistryParameters(
  IN PVOID HwDeviceExtension,
  IN PWSTR ParameterName,
  IN UCHAR IsParameterFileName,
  IN PMINIPORT_GET_REGISTRY_ROUTINE CallbackRoutine,
  IN PVOID Context);

VPAPI
PVOID
NTAPI
VideoPortGetRomImage(
  IN PVOID HwDeviceExtension,
  IN PVOID Unused1,
  IN ULONG Unused2,
  IN ULONG Length);

VPAPI
VP_STATUS
NTAPI
VideoPortGetVgaStatus(
  IN PVOID HwDeviceExtension,
  OUT PULONG VgaStatus);

VPAPI
LONG
FASTCALL
VideoPortInterlockedDecrement(
  IN PLONG Addend);

VPAPI
LONG
FASTCALL
VideoPortInterlockedExchange(
  IN OUT PLONG Target,
  IN LONG Value);

VPAPI
LONG
FASTCALL
VideoPortInterlockedIncrement(
  IN PLONG Addend);

VPAPI
ULONG
NTAPI
VideoPortInitialize(
  IN PVOID Argument1,
  IN PVOID Argument2,
  IN PVIDEO_HW_INITIALIZATION_DATA HwInitializationData,
  IN PVOID HwContext);

VPAPI
VP_STATUS
NTAPI
VideoPortInt10(
  IN PVOID HwDeviceExtension,
  IN PVIDEO_X86_BIOS_ARGUMENTS BiosArguments);

VPAPI
VOID
NTAPI
VideoPortLogError(
  IN PVOID HwDeviceExtension,
  IN PVIDEO_REQUEST_PACKET Vrp OPTIONAL,
  IN VP_STATUS ErrorCode,
  IN ULONG UniqueId);

VPAPI
VP_STATUS
NTAPI
VideoPortMapBankedMemory(
  IN PVOID HwDeviceExtension,
  IN PHYSICAL_ADDRESS PhysicalAddress,
  IN OUT PULONG Length,
  PULONG InIoSpace,
  PVOID *VirtualAddress,
  ULONG BankLength,
  UCHAR ReadWriteBank,
  PBANKED_SECTION_ROUTINE BankRoutine,
  PVOID Context);

VPAPI
VP_STATUS
NTAPI
VideoPortMapMemory(
  IN PVOID HwDeviceExtension,
  IN PHYSICAL_ADDRESS PhysicalAddress,
  IN OUT PULONG Length,
  IN PULONG InIoSpace,
  IN OUT PVOID *VirtualAddress);

VPAPI
VOID
NTAPI
VideoPortMoveMemory(
  IN PVOID Destination,
  IN PVOID Source,
  IN ULONG Length);

VPAPI
LONGLONG
NTAPI
VideoPortQueryPerformanceCounter(
  IN PVOID HwDeviceExtension,
  OUT PLONGLONG PerformanceFrequency OPTIONAL);

VPAPI
VP_STATUS
NTAPI
VideoPortQueryServices(
    _In_ PVOID HwDeviceExtension,
    _In_ VIDEO_PORT_SERVICES ServicesType,
    _Inout_ PINTERFACE Interface);

VPAPI
BOOLEAN
NTAPI
VideoPortQueueDpc(
  IN PVOID HwDeviceExtension,
  IN PMINIPORT_DPC_ROUTINE CallbackRoutine,
  IN PVOID Context);

VPAPI
VOID
NTAPI
VideoPortReadPortBufferUchar(
  IN PUCHAR Port,
  OUT PUCHAR Buffer,
  IN ULONG Count);

VPAPI
VOID
NTAPI
VideoPortReadPortBufferUlong(
  IN PULONG Port,
  OUT PULONG Buffer,
  IN ULONG Count);

VPAPI
VOID
NTAPI
VideoPortReadPortBufferUshort(
  IN PUSHORT Port,
  OUT PUSHORT Buffer,
  IN ULONG Count);

VPAPI
UCHAR
NTAPI
VideoPortReadPortUchar(
  IN PUCHAR Port);

VPAPI
ULONG
NTAPI
VideoPortReadPortUlong(
  IN PULONG Port);

VPAPI
USHORT
NTAPI
VideoPortReadPortUshort(
  IN PUSHORT Port);

VPAPI
VOID
NTAPI
VideoPortReadRegisterBufferUchar(
  IN PUCHAR Register,
  OUT PUCHAR Buffer,
  IN ULONG Count);

VPAPI
VOID
NTAPI
VideoPortReadRegisterBufferUlong(
  IN PULONG Register,
  OUT PULONG Buffer,
  IN ULONG Count);

VPAPI
VOID
NTAPI
VideoPortReadRegisterBufferUshort(
  IN PUSHORT Register,
  OUT PUSHORT Buffer,
  IN ULONG Count);

VPAPI
UCHAR
NTAPI
VideoPortReadRegisterUchar(
  IN PUCHAR Register);

VPAPI
ULONG
NTAPI
VideoPortReadRegisterUlong(
  IN PULONG Register);

VPAPI
USHORT
NTAPI
VideoPortReadRegisterUshort(
  IN PUSHORT Register);

VPAPI
VOID
NTAPI
VideoPortReleaseBuffer(
  IN PVOID HwDeviceExtension,
  IN PVOID Buffer);

VPAPI
VOID
NTAPI
VideoPortReleaseDeviceLock(
  IN PVOID HwDeviceExtension);

VPAPI
BOOLEAN
NTAPI
VideoPortScanRom(
  PVOID HwDeviceExtension,
  PUCHAR RomBase,
  ULONG RomLength,
  PUCHAR String);

VPAPI
ULONG
NTAPI
VideoPortSetBusData(
  IN PVOID HwDeviceExtension,
  IN BUS_DATA_TYPE BusDataType,
  IN ULONG SlotNumber,
  IN PVOID Buffer,
  IN ULONG Offset,
  IN ULONG Length);

VPAPI
VP_STATUS
NTAPI
VideoPortSetRegistryParameters(
  IN PVOID HwDeviceExtension,
  IN PWSTR ValueName,
  IN PVOID ValueData,
  IN ULONG ValueLength);

VPAPI
VP_STATUS
NTAPI
VideoPortSetTrappedEmulatorPorts(
  IN PVOID HwDeviceExtension,
  IN ULONG NumAccessRanges,
  IN PVIDEO_ACCESS_RANGE AccessRange);

VPAPI
VOID
NTAPI
VideoPortStallExecution(
  IN ULONG Microseconds);

VPAPI
VOID
NTAPI
VideoPortStartTimer(
  IN PVOID HwDeviceExtension);

VPAPI
VOID
NTAPI
VideoPortStopTimer(
  IN PVOID HwDeviceExtension);

VPAPI
BOOLEAN
NTAPI
VideoPortSynchronizeExecution(
  IN PVOID HwDeviceExtension,
  IN VIDEO_SYNCHRONIZE_PRIORITY Priority,
  IN PMINIPORT_SYNCHRONIZE_ROUTINE SynchronizeRoutine,
  IN PVOID Context);

VPAPI
VP_STATUS
NTAPI
VideoPortUnmapMemory(
  IN PVOID HwDeviceExtension,
  IN OUT PVOID VirtualAddress,
  IN HANDLE ProcessHandle);

VPAPI
VP_STATUS
NTAPI
VideoPortVerifyAccessRanges(
    _In_ PVOID HwDeviceExtension,
    _In_opt_ ULONG NumAccessRanges,
    _In_reads_opt_(NumAccessRanges) PVIDEO_ACCESS_RANGE AccessRanges);

VPAPI
VOID
NTAPI
VideoPortWritePortBufferUchar(
  IN PUCHAR Port,
  IN PUCHAR Buffer,
  IN ULONG Count);

VPAPI
VOID
NTAPI
VideoPortWritePortBufferUlong(
  IN PULONG Port,
  IN PULONG Buffer,
  IN ULONG Count);

VPAPI
VOID
NTAPI
VideoPortWritePortBufferUshort(
  IN PUSHORT Port,
  IN PUSHORT Buffer,
  IN ULONG Count);

VPAPI
VOID
NTAPI
VideoPortWritePortUchar(
  IN PUCHAR Port,
  IN UCHAR Value);

VPAPI
VOID
NTAPI
VideoPortWritePortUlong(
  IN PULONG Port,
  IN ULONG Value);

VPAPI
VOID
NTAPI
VideoPortWritePortUshort(
  IN PUSHORT Port,
  IN USHORT Value);

VPAPI
VOID
NTAPI
VideoPortWriteRegisterBufferUchar(
  IN PUCHAR Register,
  IN PUCHAR Buffer,
  IN ULONG Count);

VPAPI
VOID
NTAPI
VideoPortWriteRegisterBufferUlong(
  IN PULONG Register,
  IN PULONG Buffer,
  IN ULONG Count);

VPAPI
VOID
NTAPI
VideoPortWriteRegisterBufferUshort(
  IN PUSHORT Register,
  IN PUSHORT Buffer,
  IN ULONG Count);

VPAPI
VOID
NTAPI
VideoPortWriteRegisterUchar(
  IN PUCHAR Register,
  IN UCHAR Value);

VPAPI
VOID
NTAPI
VideoPortWriteRegisterUlong(
  IN PULONG Register,
  IN ULONG Value);

VPAPI
VOID
NTAPI
VideoPortWriteRegisterUshort(
  IN PUSHORT Register,
  IN USHORT Value);

VPAPI
VOID
NTAPI
VideoPortZeroDeviceMemory(
  IN PVOID Destination,
  IN ULONG Length);

VPAPI
VOID
NTAPI
VideoPortZeroMemory(
  IN PVOID Destination,
  IN ULONG Length);

VPAPI
PVOID
NTAPI
VideoPortAllocateContiguousMemory(
  IN PVOID HwDeviceExtension,
  IN ULONG NumberOfBytes,
  IN PHYSICAL_ADDRESS HighestAcceptableAddress);

VPAPI
PVOID
NTAPI
VideoPortGetCommonBuffer(
  IN PVOID HwDeviceExtension,
  IN ULONG DesiredLength,
  IN ULONG Alignment,
  OUT PPHYSICAL_ADDRESS LogicalAddress,
  OUT PULONG pActualLength,
  IN BOOLEAN CacheEnabled);

VPAPI
VOID
NTAPI
VideoPortFreeCommonBuffer(
  IN PVOID HwDeviceExtension,
  IN ULONG Length,
  IN PVOID VirtualAddress,
  IN PHYSICAL_ADDRESS LogicalAddress,
  IN BOOLEAN CacheEnabled);

VPAPI
PDMA
NTAPI
VideoPortDoDma(
  IN PVOID HwDeviceExtension,
  IN PDMA pDma,
  IN DMA_FLAGS DmaFlags);

VPAPI
BOOLEAN
NTAPI
VideoPortLockPages(
  IN PVOID HwDeviceExtension,
  IN OUT PVIDEO_REQUEST_PACKET pVrp,
  IN OUT PEVENT pUEvent,
  IN PEVENT pDisplayEvent,
  IN DMA_FLAGS DmaFlags);

VPAPI
BOOLEAN
NTAPI
VideoPortUnlockPages(
  IN PVOID hwDeviceExtension,
  IN OUT PDMA pDma);

VPAPI
BOOLEAN
NTAPI
VideoPortSignalDmaComplete(
  IN PVOID HwDeviceExtension,
  IN PDMA pDmaHandle);

VPAPI
PVOID
NTAPI
VideoPortGetMdl(
  IN PVOID HwDeviceExtension,
  IN PDMA pDma);

VPAPI
PVOID
NTAPI
VideoPortGetDmaContext(
  IN PVOID HwDeviceExtension,
  IN PDMA pDma);

VPAPI
VOID
NTAPI
VideoPortSetDmaContext(
  IN PVOID HwDeviceExtension,
  OUT PDMA pDma,
  IN PVOID InstanceContext);

VPAPI
ULONG
NTAPI
VideoPortGetBytesUsed(
  IN PVOID HwDeviceExtension,
  IN PDMA pDma);

VPAPI
VOID
NTAPI
VideoPortSetBytesUsed(
  IN PVOID HwDeviceExtension,
  IN OUT PDMA pDma,
  IN ULONG BytesUsed);

VPAPI
PDMA
NTAPI
VideoPortAssociateEventsWithDmaHandle(
  IN PVOID HwDeviceExtension,
  IN OUT PVIDEO_REQUEST_PACKET pVrp,
  IN PVOID MappedUserEvent,
  IN PVOID DisplayDriverEvent);

VPAPI
PDMA
NTAPI
VideoPortMapDmaMemory(
  IN PVOID HwDeviceExtension,
  IN PVIDEO_REQUEST_PACKET pVrp,
  IN PHYSICAL_ADDRESS BoardAddress,
  IN PULONG Length,
  IN PULONG InIoSpace,
  IN PVOID MappedUserEvent,
  IN PVOID DisplayDriverEvent,
  IN OUT PVOID *VirtualAddress);

VPAPI
BOOLEAN
NTAPI
VideoPortUnmapDmaMemory(
  IN PVOID HwDeviceExtension,
  IN PVOID VirtualAddress,
  IN HANDLE ProcessHandle,
  IN PDMA BoardMemoryHandle);

VPAPI
VP_STATUS
NTAPI
VideoPortCreateSecondaryDisplay(
  IN PVOID HwDeviceExtension,
  IN OUT PVOID *SecondaryDeviceExtension,
  IN ULONG ulFlag);

VPAPI
PVP_DMA_ADAPTER
NTAPI
VideoPortGetDmaAdapter(
  IN PVOID HwDeviceExtension,
  IN PVP_DEVICE_DESCRIPTION VpDeviceDescription);

VPAPI
VOID
NTAPI
VideoPortPutDmaAdapter(
  IN PVOID HwDeviceExtension,
  IN PVP_DMA_ADAPTER VpDmaAdapter);

VPAPI
PVOID
NTAPI
VideoPortAllocateCommonBuffer(
  IN PVOID HwDeviceExtension,
  IN PVP_DMA_ADAPTER VpDmaAdapter,
  IN ULONG DesiredLength,
  OUT PPHYSICAL_ADDRESS LogicalAddress,
  IN BOOLEAN CacheEnabled,
  PVOID Reserved);

VPAPI
VOID
NTAPI
VideoPortReleaseCommonBuffer(
  IN PVOID HwDeviceExtension,
  IN PVP_DMA_ADAPTER VpDmaAdapter,
  IN ULONG Length,
  IN PHYSICAL_ADDRESS LogicalAddress,
  IN PVOID VirtualAddress,
  IN BOOLEAN CacheEnabled);

VPAPI
PVOID
NTAPI
VideoPortLockBuffer(
  IN PVOID HwDeviceExtension,
  IN PVOID BaseAddress,
  IN ULONG Length,
  IN VP_LOCK_OPERATION Operation);

VPAPI
VOID
NTAPI
VideoPortUnlockBuffer(
  IN PVOID HwDeviceExtension,
  IN PVOID Mdl);

VPAPI
VP_STATUS
NTAPI
VideoPortStartDma(
  IN PVOID HwDeviceExtension,
  IN PVP_DMA_ADAPTER VpDmaAdapter,
  IN PVOID Mdl,
  IN ULONG Offset,
  IN OUT PULONG pLength,
  IN PEXECUTE_DMA ExecuteDmaRoutine,
  IN PVOID Context,
  IN BOOLEAN WriteToDevice);

VPAPI
VP_STATUS
NTAPI
VideoPortCompleteDma(
  IN PVOID HwDeviceExtension,
  IN PVP_DMA_ADAPTER VpDmaAdapter,
  IN PVP_SCATTER_GATHER_LIST VpScatterGather,
  IN BOOLEAN WriteToDevice);

VPAPI
VP_STATUS
NTAPI
VideoPortCreateEvent(
  IN PVOID HwDeviceExtension,
  IN ULONG EventFlag,
  IN PVOID Unused,
  OUT PEVENT *ppEvent);

VPAPI
VP_STATUS
NTAPI
VideoPortDeleteEvent(
  IN PVOID HwDeviceExtension,
  IN PEVENT pEvent);

VPAPI
LONG
NTAPI
VideoPortSetEvent(
  IN PVOID HwDeviceExtension,
  IN PEVENT pEvent);

VPAPI
VOID
NTAPI
VideoPortClearEvent(
  IN PVOID HwDeviceExtension,
  IN PEVENT pEvent);

VPAPI
LONG
NTAPI
VideoPortReadStateEvent(
  IN PVOID HwDeviceExtension,
  IN PEVENT pEvent);

VPAPI
VP_STATUS
NTAPI
VideoPortWaitForSingleObject(
  IN PVOID HwDeviceExtension,
  IN PVOID Object,
  IN PLARGE_INTEGER Timeout OPTIONAL);

VPAPI
PVOID
NTAPI
VideoPortAllocatePool(
  IN PVOID HwDeviceExtension,
  IN VP_POOL_TYPE PoolType,
  IN SIZE_T NumberOfBytes,
  IN ULONG Tag);

VPAPI
VOID
NTAPI
VideoPortFreePool(
  IN PVOID HwDeviceExtension,
  IN PVOID Ptr);

VPAPI
VP_STATUS
NTAPI
VideoPortCreateSpinLock(
  IN PVOID HwDeviceExtension,
  OUT PSPIN_LOCK *SpinLock);

VPAPI
VP_STATUS
NTAPI
VideoPortDeleteSpinLock(
  IN PVOID HwDeviceExtension,
  IN PSPIN_LOCK SpinLock);

VPAPI
VOID
NTAPI
VideoPortAcquireSpinLock(
  IN PVOID HwDeviceExtension,
  IN PSPIN_LOCK SpinLock,
  OUT PUCHAR OldIrql);

VPAPI
VOID
NTAPI
VideoPortAcquireSpinLockAtDpcLevel(
  IN PVOID HwDeviceExtension,
  IN PSPIN_LOCK SpinLock);

VPAPI
VOID
NTAPI
VideoPortReleaseSpinLock(
  IN PVOID HwDeviceExtension,
  IN PSPIN_LOCK SpinLock,
  IN UCHAR NewIrql);

VPAPI
VOID
NTAPI
VideoPortReleaseSpinLockFromDpcLevel(
  IN PVOID HwDeviceExtension,
  IN PSPIN_LOCK SpinLock);

VPAPI
VOID
NTAPI
VideoPortQuerySystemTime(
  OUT PLARGE_INTEGER CurrentTime);

VPAPI
BOOLEAN
NTAPI
VideoPortCheckForDeviceExistence(
  IN PVOID HwDeviceExtension,
  IN USHORT VendorId,
  IN USHORT DeviceId,
  IN UCHAR RevisionId,
  IN USHORT SubVendorId,
  IN USHORT SubSystemId,
  IN ULONG Flags);

VPAPI
ULONG
NTAPI
VideoPortGetAssociatedDeviceID(
  IN PVOID DeviceObject);

VPAPI
VP_STATUS
NTAPI
VideoPortFlushRegistry(
  PVOID HwDeviceExtension);

VPAPI
VP_STATUS
NTAPI
VideoPortGetVersion(
  IN PVOID HwDeviceExtension,
  IN OUT PVPOSVERSIONINFO pVpOsVersionInfo);

VPAPI
BOOLEAN
NTAPI
VideoPortIsNoVesa(VOID);

VPAPI
VP_STATUS
NTAPI
VideoPortRegisterBugcheckCallback(
  IN PVOID HwDeviceExtension,
  IN ULONG BugcheckCode,
  IN PVIDEO_BUGCHECK_CALLBACK Callback,
  IN ULONG BugcheckDataSize);

VPAPI
PVIDEO_DEBUG_REPORT
NTAPI
VideoPortDbgReportCreate(
  IN PVOID HwDeviceExtension,
  IN ULONG ulCode,
  IN ULONG_PTR ulpArg1,
  IN ULONG_PTR ulpArg2,
  IN ULONG_PTR ulpArg3,
  IN ULONG_PTR ulpArg4);

VPAPI
BOOLEAN
NTAPI
VideoPortDbgReportSecondaryData(
  IN OUT PVIDEO_DEBUG_REPORT pReport,
  IN PVOID pvData,
  IN ULONG ulDataSize);

VPAPI
VOID
NTAPI
VideoPortDbgReportComplete(
  IN OUT PVIDEO_DEBUG_REPORT pReport);

#ifdef __cplusplus
}
#endif