WDF_DMA_DIRECTION enumeration (wdfdmaenabler.h)

[Applies to KMDF only]

The WDF_DMA_DIRECTION enumeration defines the direction of a DMA transfer.

Syntax

typedef enum _WDF_DMA_DIRECTION {
  WdfDmaDirectionReadFromDevice = FALSE,
  WdfDmaDirectionWriteToDevice = TRUE
} WDF_DMA_DIRECTION;


`WdfDmaDirectionReadFromDevice` Value: FALSE The DMA transfer direction is from the device (read).
`WdfDmaDirectionWriteToDevice` Value: TRUE The DMA transfer direction is to the device (write).

The WDF_DMA_DIRECTION enumeration is used as input to the EvtProgramDma callback function and the WdfDmaTransactionInitialize and WdfDmaTransactionInitializeUsingRequest methods.

Requirement	Value
Minimum KMDF version	1.0
Header	wdfdmaenabler.h (include Wdf.h)