PFLUSH_DMA_BUFFER - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers 
// wdm.h

PFLUSH_DMA_BUFFER PflushDmaBuffer;

NTSTATUS PflushDmaBuffer(
  [in] PDMA_ADAPTER DmaAdapter,
  [in] PMDL Mdl,
  [in] BOOLEAN ReadOperation
)
{...}
View the official Windows Driver Kit DDI reference

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Windows Driver Kit DDI reference (nc-wdm-pflush_dma_buffer)

Description

The callback routine flushes any data remaining in the memory region described by an MDL.

Parameters

DmaAdapter: [in]

A pointer to a DMA_ADAPTER structure. This structure is the adapter object that represents the driver's bus-master DMA device or system DMA channel. The caller obtained this pointer from a previous call to the IoGetDmaAdapter routine.

Mdl: [in]

A pointer to the MDL that describes the buffer previously passed in the driver's call to MapTransfer.

ReadOperation: [in]

Specifies TRUE if the flush is being performed for a read operation, and FALSE for a write operation. For more information, see the following Remarks section.

Return value

Returns STATUS_SUCCESS if the call is successful. Otherwise, returns an appropriate NTSTATUS values error code. For more information, see NTSTATUS Values.

Remarks

See also

Flushing Cached Data during DMA Operations

View the official Windows Driver Kit DDI reference

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