VP_DEVICE_DESCRIPTION - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers

// video.h

typedef struct _VP_DEVICE_DESCRIPTION {
  BOOLEAN ScatterGather;
  BOOLEAN Dma32BitAddresses;
  BOOLEAN Dma64BitAddresses;
  ULONG   MaximumLength;
} VP_DEVICE_DESCRIPTION, *PVP_DEVICE_DESCRIPTION;
View the official Windows Driver Kit DDI reference

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Windows Driver Kit DDI reference (ns-video-_vp_device_description)

_VP_DEVICE_DESCRIPTION structure

Description

The VP_DEVICE_DESCRIPTION structure describes the attributes of the physical device for which a driver is requesting a DMA object.

Members

`ScatterGather`

If TRUE, indicates that the device supports scatter/gather DMA. If FALSE, the device does not support scatter/gather DMA.

`Dma32BitAddresses`

If TRUE, specifies that 32-bit addresses are being used for DMA operations.

`Dma64BitAddresses`

If TRUE, specifies that 64-bit addresses are being used for DMA operations.

`MaximumLength`

Specifies the maximum number of bytes the device can handle in each DMA operation.

Remarks

This structure is available in Windows XP and later.

View the official Windows Driver Kit DDI reference

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