WDF_DMA_PROFILE - NtDoc
Native API online documentation, based on the System Informer
(formerly Process Hacker) phnt
headers
// wdfdmaenabler.h
typedef enum _WDF_DMA_PROFILE {
WdfDmaProfileInvalid = 0,
WdfDmaProfilePacket,
WdfDmaProfileScatterGather,
WdfDmaProfilePacket64,
WdfDmaProfileScatterGather64,
WdfDmaProfileScatterGatherDuplex,
WdfDmaProfileScatterGather64Duplex,
WdfDmaProfileSystem,
WdfDmaProfileSystemDuplex
} WDF_DMA_PROFILE;
View the official Windows Driver Kit DDI referenceNo description available.
[Applies to KMDF only]
The WDF_DMA_PROFILE enumeration identifies the types of bus-master or system-mode DMA operations that devices can support.
WdfDmaProfileInvalid:0For internal use only.
WdfDmaProfilePacketThe device supports single-packet DMA operations, using 32-bit addressing.
WdfDmaProfileScatterGatherThe device supports packet-based, scatter/gather DMA operations, using 32-bit addressing.
WdfDmaProfilePacket64The device supports single-packet DMA operations, using 64-bit addressing.
WdfDmaProfileScatterGather64The device supports packet-based, scatter/gather DMA operations, using 64-bit addressing.
WdfDmaProfileScatterGatherDuplexThe device supports packet-based, scatter/gather DMA operations, using 32-bit addressing. The device also supports duplex operation.
WdfDmaProfileScatterGather64DuplexThe device supports packet-based, scatter/gather DMA operations, using 64-bit addressing. The device also supports duplex operation.
WdfDmaProfileSystemThe device supports system-mode DMA operations. This value is available in version 1.11 and later versions of KMDF running on Windows 8 or later versions of Windows.
WdfDmaProfileSystemDuplexThe device supports system-mode DMA operations. The device also supports duplex operation. This value is available in version 1.11 and later versions of KMDF running on Windows 8 or later versions of Windows.
WDF_DMA_PROFILE-typed values are used within the driver's WDF_DMA_ENABLER_CONFIG structure. The driver supplies WDF_DMA_ENABLER_CONFIG when it calls WdfDmaEnablerCreate.
If the driver selects one of the system-mode DMA profiles, the framework requests the DMA version 3 interface from WDM. System-mode DMA is available starting in Windows 8. For more information about system-mode DMA, see Supporting System-Mode DMA.
Kernel-Mode Driver Framework (KMDF) miniport drivers such as NDIS miniport drivers can request the system-mode DMA profiles. For information about how to write a framework-based miniport driver, see Creating Framework-based Miniport Drivers.