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DXGKARGCB_MAPMDLTOIOMMU structure (d3dkmddi.h)

  • Article

The DXGKARGCB_MAPMDLTOIOMMU structure contains the arguments used by the DXGKCB_MAPMDLTOIOMMU callback function, to map a memory descriptor list (MDL) to the IOMMU.

Syntax

typedef struct _DXGKARGCB_MAPMDLTOIOMMU {
  [in]  PMDL   pMdl;
  [out] HANDLE hMemoryHandle;
} DXGKARGCB_MAPMDLTOIOMMU;

Members

[in] pMdl

An MDL which must be populated with valid pages. The MDL and the pages it points to must remain unchanged until the corresponding unmap call is made.

[out] hMemoryHandle

A Dxgkrnl tracking handle for the allocation. This value should be passed to the corresponding DXGKCB_UNMAPMDLFROMIOMMU function.

Remarks

See IOMMU-based GPU isolation for more information.

Requirements

Requirement Value
Minimum supported client Windows 10, version 1803 (WDDM 2.4)
Header d3dkmddi.h

See also

DXGKCB_MAPMDLTOIOMMU