// d3dkmddi.h

typedef struct _DXGKARGCB_UNMAP_PHYSICAL_MEMORY {
  HANDLE hPhysicalMemoryObject;
  void   *pBaseAddress;
  SIZE_T Size;
} DXGKARGCB_UNMAP_PHYSICAL_MEMORY;
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Windows Driver Kit DDI reference (ns-d3dkmddi-dxgkargcb_unmap_physical_memory)

Description

The DXGKARGCB_UNMAP_PHYSICAL_MEMORY structure contains information about the physical memory object from which the CPU-visible address is being unmapped by the DXGKCB_UNMAPPHYSICALMEMORY callback function.

Members

`hPhysicalMemoryObject`

The physical memory object from which the CPU-visible address is being unmapped.

`pBaseAddress`

The base address returned from DXGKCB_MAPPHYSICALMEMORY that is being unmapped.

`Size`

The size, in bytes, of the mapped region. This should match the mapped Size parameter that was output from the corresponding map call.

Remarks

See IOMMU DMA remapping for more information.

DXGKARGCB_UNMAP_PHYSICAL_MEMORY - NtDoc