// wdfdmaenabler.h

typedef enum _WDF_DMA_DIRECTION {
  WdfDmaDirectionReadFromDevice = FALSE,
  WdfDmaDirectionWriteToDevice = TRUE
} WDF_DMA_DIRECTION;
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Windows Driver Kit DDI reference (ne-wdfdmaenabler-_wdf_dma_direction)

_WDF_DMA_DIRECTION enumeration

Description

[Applies to KMDF only]

The WDF_DMA_DIRECTION enumeration defines the direction of a DMA transfer.

Constants

`WdfDmaDirectionReadFromDevice:FALSE`

The DMA transfer direction is from the device (read).

`WdfDmaDirectionWriteToDevice:TRUE`

The DMA transfer direction is to the device (write).

Remarks

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

WDF_DMA_DIRECTION - NtDoc