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NetAdapterCx is preview only in Windows 10, version 1903.
The NET_ADAPTER_RX_CAPABILITIES_INIT_SYSTEM_MANAGED_DMA method initializes a NET_ADAPTER_RX_CAPABILITIES structure for a net adapter that would like to specify operating system-managed receive buffer allocation and attachment, as well as DMA for memory mapping.
void NET_ADAPTER_RX_CAPABILITIES_INIT_SYSTEM_MANAGED_DMA( NET_ADAPTER_RX_CAPABILITIES *RxCapabilities, NET_ADAPTER_DMA_CAPABILITIES *DmaCapabilities, SIZE_T MaximumFrameSize, SIZE_T MaximumNumberOfQueues );
A pointer to a driver-allocated NET_ADAPTER_RX_CAPABILITIES structure.
A pointer to a driver-allocated and initialized NET_ADAPTER_DMA_CAPABILITIES structure.
The maximum number of receive queues that the adapter supports.
This method does not return a value.
This method is one of three possible methods to call in order to initialize a NET_ADAPTER_RX_CAPABILITIES structure. Which one the client driver should call depends on how it would like to allocate receive buffers and if it would like to use DMA.
The client driver must call NET_ADAPTER_RX_CAPABILITIES_INIT_SYSTEM_MANAGED_DMA to initialize its NET_ADAPTER_RX_CAPABILITIES structure if it would like the operating system to perform receive buffer allocation and attachment, and if it would also like to use DMA in its receive data path. By calling this method, the Rx capabilities structure's AllocationMode member is set to NetRxFragmentBufferAllocationModeSystem and the AttachmentMode member is set to NetRxFragmentBufferAttachmentModeSystem.
Before calling NET_ADAPTER_RX_CAPABILITIES_INIT_SYSTEM_MANAGED_DMA, the driver must have allocated a NET_ADAPTER_DMA_CAPABILITIES structure and initialized it with NET_ADAPTER_DMA_CAPABILITIES_INIT. This DMA capabilities structure is then assigned to the DmaCapabilities member of the NET_ADAPTER_RX_CAPABILITIES structure.
|Minimum KMDF version||1.25|
|Header||netadapter.h (include netadaptercx.h)|