DXGKARGCB_OPEN_PHYSICAL_MEMORY_OBJECT - NtDoc
Native API online documentation, based on the System Informer
(formerly Process Hacker) phnt
headers
// d3dkmddi.h
typedef struct _DXGKARGCB_OPEN_PHYSICAL_MEMORY_OBJECT {
[in] HANDLE hPhysicalMemoryObject;
[in] HANDLE hAdapter;
[out] HANDLE hAdapterMemoryObject;
} DXGKARGCB_OPEN_PHYSICAL_MEMORY_OBJECT;
View the official Windows Driver Kit DDI referenceNo description available.
The DXGKARGCB_OPEN_PHYSICAL_MEMORY_OBJECT structure contains the information used by the DXGKCB_OPENPHYSICALMEMORYOBJECT callback function to open a physical memory object.
hPhysicalMemoryObject [in]The physical memory object handle that was returned from a call to DXGKCB_CREATEPHYSICALMEMORYOBJECT.
hAdapter [in]A handle to any adapter that is part of the logical adapter to open the physical object against. This can be any physical adapter that is linked together in a linked display adapter (LDA) chain.
hAdapterMemoryObject [out]Field in which a handle to the opened physical memory object for this adapter is returned.
If the driver creates a physical memory object and specifies a non-NULL value for hAdapter in that call, then it must not call DxgkCbOpenPhysicalObject again. Doing so will return a failure indicating that the physical object is already opened against the adapter.
At this time, a physical memory object may only be opened by a single adapter. Attempting to open the object on a second adapter will fail.
Opening a physical memory object against one physical adapter is sufficient. This guarantees that all physical adapters in the logical adapter (all linked adapters) have a mirrored view of this memory.
See IOMMU DMA remapping for more information.
DXGKCB_CREATEPHYSICALMEMORYOBJECT
DXGKCB_OPENPHYSICALMEMORYOBJECT