wdfdmatransaction.h header

This header is used by wdf. For more information, see:

• Windows Driver Framework

wdfdmatransaction.h contains the following programming interfaces:

Functions

WdfDmaTransactionAllocateResources The WdfDmaTransactionAllocateResources method reserves a single-packet or system-mode DMA enabler for exclusive (and repeated) use with the specified transaction object.
WdfDmaTransactionCancel The WdfDmaTransactionCancel method attempts to cancel a DMA transaction that is waiting for the allocation of map registers.
WdfDmaTransactionCreate The WdfDmaTransactionCreate method creates a DMA transaction.
WdfDmaTransactionDmaCompleted The WdfDmaTransactionDmaCompleted method notifies the framework that a device's DMA transfer operation is completed.
WdfDmaTransactionDmaCompletedFinal The WdfDmaTransactionDmaCompletedFinal method notifies the framework that a device's DMA transfer operation has completed with an underrun condition and supplies the length of the completed transfer.
WdfDmaTransactionDmaCompletedWithLength The WdfDmaTransactionDmaCompletedWithLength method notifies the framework that a device's DMA transfer operation is complete and supplies the length of the completed transfer.
WdfDmaTransactionExecute The WdfDmaTransactionExecute method begins the execution of a specified DMA transaction.
WdfDmaTransactionFreeResources The WdfDmaTransactionFreeResources method releases DMA resources that the driver previously allocated by calling WdfDmaTransactionAllocateResources.
WdfDmaTransactionGetBytesTransferred The WdfDmaTransactionGetBytesTransferred method returns the total number of bytes that have been transferred for a specified DMA transaction.
WdfDmaTransactionGetCurrentDmaTransferLength The WdfDmaTransactionGetCurrentDmaTransferLength method returns the size of the current DMA transfer.
WdfDmaTransactionGetDevice The WdfDmaTransactionGetDevice method returns a handle to the framework device object that is associated with a specified DMA transaction.
WdfDmaTransactionGetRequest The WdfDmaTransactionGetRequest method retrieves a handle to the framework request object that is associated with a specified DMA transaction.
WdfDmaTransactionGetTransferInfo The WdfDmaTransactionGetTransferInfo method returns the number of map registers and scatter/gather list entries required for an initialized DMA transaction.
WdfDmaTransactionInitialize The WdfDmaTransactionInitialize method initializes a specified DMA transaction.
WdfDmaTransactionInitializeUsingOffset The WdfDmaTransactionInitializeUsingOffset method initializes a specified DMA transaction by using a byte offset into an MDL chain.
WdfDmaTransactionInitializeUsingRequest The WdfDmaTransactionInitializeUsingRequest method initializes a specified DMA transaction by using the parameters of a specified I/O request.
WdfDmaTransactionRelease The WdfDmaTransactionRelease method terminates a specified DMA transaction without deleting the associated DMA transaction object.
WdfDmaTransactionSetChannelConfigurationCallback The WdfDmaTransactionSetChannelConfigurationCallback method registers a channel configuration event callback function for a system-mode DMA transaction.
WdfDmaTransactionSetDeviceAddressOffset The WdfDmaTransactionSetDeviceAddressOffset method specifies the offset of the register that the system DMA controller will access when performing the DMA operation.
WdfDmaTransactionSetImmediateExecution The WdfDmaTransactionSetImmediateExecution method marks the specified DMA transaction so that calls to WdfDmaTransactionExecute and WdfDmaTransactionAllocateResources initiate the transaction immediately or fail.
WdfDmaTransactionSetMaximumLength The WdfDmaTransactionSetMaximumLength method sets the maximum length for the DMA transfers that are associated with a specified DMA transaction.
WdfDmaTransactionSetSingleTransferRequirement The WdfDmaTransactionSetSingleTransferRequirement method specifies that a DMA transaction must complete in a single transfer.
WdfDmaTransactionSetTransferCompleteCallback The WdfDmaTransactionSetTransferCompleteCallback method registers a transfer completion event callback function for a system-mode DMA transaction.
WdfDmaTransactionStopSystemTransfer The WdfDmaTransactionStopSystemTransfer method attempts to stop a system-mode DMA transfer after the framework has called EvtProgramDma.
WdfDmaTransactionWdmGetTransferContext The WdfDmaTransactionWdmGetTransferContext method retrieves the WDM transfer context that is associated with a DMA transaction.

Callback functions

EVT_WDF_DMA_TRANSACTION_CONFIGURE_DMA_CHANNEL A driver's EvtDmaTransactionConfigureDmaChannel event callback function configures the DMA adapter for a system-mode DMA enabler.
EVT_WDF_DMA_TRANSACTION_DMA_TRANSFER_COMPLETE A driver's EvtDmaTransactionDmaTransferComplete event callback function is called when the system-mode controller has completed the current DMA transfer.
EVT_WDF_PROGRAM_DMA A framework-based driver's EvtProgramDma event callback function programs a specified device to perform a DMA transfer operation.
EVT_WDF_RESERVE_DMA The EvtReserveDma event callback function is called when the framework has reserved resources to execute and release a transaction. Reserved resources include map registers and the WDM DMA adapter's lock.