DXGKCB_CLOSEPHYSICALMEMORYOBJECT callback function (d3dkmddi.h)

Article
02/22/2024

DXGKCB_CLOSEPHYSICALMEMORYOBJECT closes a physical memory object.

Syntax

DXGKCB_CLOSEPHYSICALMEMORYOBJECT DxgkcbClosephysicalmemoryobject;

void DxgkcbClosephysicalmemoryobject(
  [in] IN_CONST_PDXGKARGCB_CLOSE_PHYSICAL_MEMORY_OBJECT pArgs
)
{...}

Parameters

[in] pArgs

Pointer to a DXGKARGCB_CLOSE_PHYSICAL_MEMORY_OBJECT structure that contains information about the physical memory object to close.

Return value

None

Remarks

If the driver chooses to specify hAdapterMemoryObject as part of the DXGKCB_DESTROYPHYSICALMEMORYOBJECT call, then it is not necessary to close it via DXGKCB_CLOSEPHYSICALMEMORYOBJECT as well.

See IOMMU DMA remapping for more information.

DXGKCB_XXX functions are implemented by Dxgkrnl. To use this callback function, set the members of DXGKARGCB_ALLOCATEPAGESFORMDL and then call DxgkCbClosePhysicalMemoryObject via the DXGKRNL_INTERFACE.

Requirements

Requirement	Value
Minimum supported server	Windows Server 2022 (WDDM 2.9)
Header	d3dkmddi.h
IRQL	PASSIVE_LEVEL