EVT_WDF_DMA_ENABLER_FILL - NtDoc
Native API online documentation, based on the System Informer
(formerly Process Hacker) phnt
headers
// wdfdmaenabler.h
EVT_WDF_DMA_ENABLER_FILL EvtWdfDmaEnablerFill;
NTSTATUS EvtWdfDmaEnablerFill(
[in] WDFDMAENABLER DmaEnabler
)
{...}
View the official Windows Driver Kit DDI referenceNo description available.
[Applies to KMDF only]
A driver's EvtDmaEnablerFill event callback function allocates a device's DMA buffers.
DmaEnabler [in]A handle to a DMA enabler object.
EvtDmaEnablerFill must return STATUS_SUCCESS or another status value for which NT_SUCCESS(status) equals TRUE, if it encounters no errors. Otherwise, this callback function must return a status value for which NT_SUCCESS(status) equals FALSE.
To register an EvtDmaEnablerFill callback function, a function driver for a DMA device places the callback function's address in a WDF_DMA_ENABLER_CONFIG structure before the driver calls WdfDmaEnablerCreate.
For more information about the EvtDmaEnablerFill callback function, see Supporting Power Management for DMA Devices.
The EvtDmaEnablerFill callback function is called at IRQL = PASSIVE_LEVEL. You should not make this callback function pageable.