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diff --git a/doc/guides/nics/enetc.rst b/doc/guides/nics/enetc.rst new file mode 100644 index 00000000..8038bf20 --- /dev/null +++ b/doc/guides/nics/enetc.rst @@ -0,0 +1,110 @@ +.. SPDX-License-Identifier: BSD-3-Clause + Copyright 2018 NXP + +ENETC Poll Mode Driver +====================== + +The ENETC NIC PMD (**librte_pmd_enetc**) provides poll mode driver +support for the inbuilt NIC found in the **NXP LS1028** SoC. + +More information can be found at `NXP Official Website +<https://www.nxp.com/products/processors-and-microcontrollers/arm-based-processors-and-mcus/qoriq-layerscape-arm-processors/qoriq-layerscape-1028a-industrial-applications-processor:LS1028A>`_. + +ENETC +----- + +This section provides an overview of the NXP ENETC +and how it is integrated into the DPDK. + +Contents summary + +- ENETC overview +- ENETC features +- PCI bus driver +- NIC driver +- Supported ENETC SoCs +- Prerequisites +- Driver compilation and testing + +ENETC Overview +~~~~~~~~~~~~~~ + +ENETC is a PCI Integrated End Point(IEP). IEP implements +peripheral devices in an SoC such that software sees them as PCIe device. +ENETC is an evolution of BDR(Buffer Descriptor Ring) based networking +IPs. + +This infrastructure simplifies adding support for IEP and facilitates in following: + +- Device discovery and location +- Resource requirement discovery and allocation (e.g. interrupt assignment, + device register address) +- Event reporting + +ENETC Features +~~~~~~~~~~~~~~ + +- Link Status +- Packet type information + +NIC Driver (PMD) +~~~~~~~~~~~~~~~~ + +ENETC PMD is traditional DPDK PMD which provides necessary interface between +RTE framework and ENETC internal drivers. + +- Driver registers the device vendor table in PCI subsystem. +- RTE framework scans the PCI bus for connected devices. +- This scanning will invoke the probe function of ENETC driver. +- The probe function will set the basic device registers and also setups BD rings. +- On packet Rx the respective BD Ring status bit is set which is then used for + packet processing. +- Then Tx is done first followed by Rx. + +Supported ENETC SoCs +~~~~~~~~~~~~~~~~~~~~ + +- LS1028 + +Prerequisites +~~~~~~~~~~~~~ + +There are three main pre-requisities for executing ENETC PMD on a ENETC +compatible board: + +1. **ARM 64 Tool Chain** + + For example, the `*aarch64* Linaro Toolchain <https://releases.linaro.org/components/toolchain/binaries/7.3-2018.05/aarch64-linux-gnu/gcc-linaro-7.3.1-2018.05-i686_aarch64-linux-gnu.tar.xz>`_. + +2. **Linux Kernel** + + It can be obtained from `NXP's Github hosting <https://source.codeaurora.org/external/qoriq/qoriq-components/linux>`_. + +3. **Rootfile system** + + Any *aarch64* supporting filesystem can be used. For example, + Ubuntu 16.04 LTS (Xenial) or 18.04 (Bionic) userland which can be obtained + from `here <http://cdimage.ubuntu.com/ubuntu-base/releases/18.04/release/ubuntu-base-18.04.1-base-arm64.tar.gz>`_. + +The following dependencies are not part of DPDK and must be installed +separately: + +- **NXP Linux LSDK** + + NXP Layerscape software development kit (LSDK) includes support for family + of QorIQ® ARM-Architecture-based system on chip (SoC) processors + and corresponding boards. + + It includes the Linux board support packages (BSPs) for NXP SoCs, + a fully operational tool chain, kernel and board specific modules. + + LSDK and related information can be obtained from: `LSDK <https://www.nxp.com/support/developer-resources/run-time-software/linux-software-and-development-tools/layerscape-software-development-kit:LAYERSCAPE-SDK>`_ + +Driver compilation and testing +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Follow instructions available in the document +:ref:`compiling and testing a PMD for a NIC <pmd_build_and_test>` +to launch **testpmd** + +To compile in performance mode, please set ``CONFIG_RTE_CACHE_LINE_SIZE=64`` |