ENETC User Space Driver Implementation on I.MX95 Platform

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NETC presents itself as a multi-function PCIe Root Complex Integrated Endpoint (RCiEP) for easy software discovery of peripheral functions. As such, it contains multiple PCIe functions. PCIe RCiEP allows for easy software integration into OSes, which support PCIe but can be easily integrated as a simple platform device for RTOSes or bare metal implementations which do not support it. Configuration and control of ENETC(s) is implemented using a combination of registers and a command message interface implemented using descriptor rings in memory.
Key goal of the DPDK is to provide a simple, complete framework for fast packet processing in data plane applications. Using the APIs provided as part of the framework, applications can leverage the capabilities of underlying network infrastructure.
DPDK been prominent software in user space for networking applications pushes for eNetc driver to be written in user space. This document introduces overview of the NXP ENETC and how its driver is implemented and integrated into the DPDK. DPDK eNetc Driver support features Multi-queue supported, Packet type parsing, promisc, MAC exact filter table filtering, VLAN exact filter table filtering, Link status interrupt, Rx checksum offload, basic stats.