// d3dkmddi.h

typedef struct _DXGK_MEMORYRANGE {
  UINT64 SegmentOffset;
  UINT64 SizeInBytes;
} DXGK_MEMORYRANGE;
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Windows Driver Kit DDI reference (ns-d3dkmddi-_dxgk_memoryrange)

DXGK_MEMORYRANGE structure

Description

A DXGK_MEMORYRANGE structure describes a range of memory.

Members

`SegmentOffset`

The offset from the start of the segment in bytes. The value must be aligned to the segment page boundary.

`SizeInBytes`

The number of bytes in the range. The value must be a multiple of the segment page size.

Remarks

One way that DXGK_MEMORYRANGE is used is with DxgkDdiQueryAdapterInfo and DXGK_QUERYSEGMENTMEMORYSTATE to query bad GPU memory ranges. The query is done during adapter object initialization. The driver is called only if DXGK_SEGMENTDESCRIPTOR4::NumInvalidMemoryRanges isn't zero for a segment.

DXGK_MEMORYRANGE - NtDoc