// d3dkmddi.h

typedef struct _DXGKARG_UNMAPCPUHOSTAPERTURE {
  UINT64 NumberOfPages;
  UINT32 *pCpuHostAperturePages;
  WORD   SegmentId;
  WORD   PhysicalAdapterIndex;
} DXGKARG_UNMAPCPUHOSTAPERTURE;
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Windows Driver Kit DDI reference (ns-d3dkmddi-_dxgkarg_unmapcpuhostaperture)

_DXGKARG_UNMAPCPUHOSTAPERTURE structure

Description

The DXGKARG_UNMAPCPUHOSTAPERTURE structure is used to unmap a previously mapped range of the CPU host aperture.

Members

`NumberOfPages`

Specifies the number of pages being unmapped.

`pCpuHostAperturePages`

Array of CPU host aperture pages to unmap. This is an array of page indices from the start of the CPU host aperture physical address.

`SegmentId`

The driver segment identifier (starting from 1) of the segment for which the CPU host aperture is unmapped.

`PhysicalAdapterIndex`

The zero-based physical adapter index in a linked display adapter link.

Note The page size is equal to the segment page size.

DXGKARG_UNMAPCPUHOSTAPERTURE - NtDoc