EVT_WDF_DMA_ENABLER_DISABLE - NtDoc

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

EVT_WDF_DMA_ENABLER_DISABLE EvtWdfDmaEnablerDisable;

NTSTATUS EvtWdfDmaEnablerDisable(
  [in] WDFDMAENABLER DmaEnabler
)
{...}
View the official Windows Driver Kit DDI reference

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Windows Driver Kit DDI reference (nc-wdfdmaenabler-evt_wdf_dma_enabler_disable)

EVT_WDF_DMA_ENABLER_DISABLE callback function

Description

[Applies to KMDF only]

A driver's EvtDmaEnablerDisable event callback function disables a device's DMA capability before the device leaves its working (D0) state.

Parameters

DmaEnabler [in]

A handle to a DMA enabler object.

Return value

EvtDmaEnablerDisable 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.

Remarks

To register an EvtDmaEnablerDisable 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 EvtDmaEnablerDisable callback function, see Supporting Power Management for DMA Devices.

See also

EvtDmaEnablerEnable

WDF_DMA_ENABLER_CONFIG

WdfDmaEnablerCreate

View the official Windows Driver Kit DDI reference

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