d629b7b5fe
Fix spelling errors in the guide docs. Signed-off-by: John McNamara <john.mcnamara@intel.com> Acked-by: Rami Rosen <ramirose@gmail.com>
118 lines
3.6 KiB
ReStructuredText
118 lines
3.6 KiB
ReStructuredText
.. SPDX-License-Identifier: BSD-3-Clause
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Copyright 2018 NXP
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ENETC Poll Mode Driver
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======================
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The ENETC NIC PMD (**librte_pmd_enetc**) provides poll mode driver
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support for the inbuilt NIC found in the **NXP LS1028** SoC.
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More information can be found at `NXP Official Website
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<https://www.nxp.com/products/processors-and-microcontrollers/arm-based-processors-and-mcus/qoriq-layerscape-arm-processors/qoriq-layerscape-1028a-industrial-applications-processor:LS1028A>`_.
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ENETC
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-----
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This section provides an overview of the NXP ENETC
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and how it is integrated into the DPDK.
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Contents summary
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- ENETC overview
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- ENETC features
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- PCI bus driver
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- NIC driver
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- Supported ENETC SoCs
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- Prerequisites
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- Driver compilation and testing
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ENETC Overview
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~~~~~~~~~~~~~~
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ENETC is a PCI Integrated End Point(IEP). IEP implements
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peripheral devices in an SoC such that software sees them as PCIe device.
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ENETC is an evolution of BDR(Buffer Descriptor Ring) based networking
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IPs.
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This infrastructure simplifies adding support for IEP and facilitates in following:
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- Device discovery and location
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- Resource requirement discovery and allocation (e.g. interrupt assignment,
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device register address)
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- Event reporting
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ENETC Features
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~~~~~~~~~~~~~~
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- Link Status
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- Packet type information
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- Basic stats
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- Promiscuous
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- Multicast
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- Jumbo packets
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- Queue Start/Stop
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- Deferred Queue Start
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- CRC offload
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NIC Driver (PMD)
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~~~~~~~~~~~~~~~~
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ENETC PMD is traditional DPDK PMD which provides necessary interface between
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RTE framework and ENETC internal drivers.
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- Driver registers the device vendor table in PCI subsystem.
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- RTE framework scans the PCI bus for connected devices.
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- This scanning will invoke the probe function of ENETC driver.
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- The probe function will set the basic device registers and also setups BD rings.
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- On packet Rx the respective BD Ring status bit is set which is then used for
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packet processing.
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- Then Tx is done first followed by Rx.
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Supported ENETC SoCs
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~~~~~~~~~~~~~~~~~~~~
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- LS1028
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Prerequisites
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~~~~~~~~~~~~~
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There are three main pre-requisites for executing ENETC PMD on a ENETC
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compatible board:
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1. **ARM 64 Tool Chain**
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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>`_.
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2. **Linux Kernel**
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It can be obtained from `NXP's Github hosting <https://source.codeaurora.org/external/qoriq/qoriq-components/linux>`_.
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3. **Rootfile system**
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Any *aarch64* supporting filesystem can be used. For example,
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Ubuntu 16.04 LTS (Xenial) or 18.04 (Bionic) userland which can be obtained
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from `here <http://cdimage.ubuntu.com/ubuntu-base/releases/18.04/release/ubuntu-base-18.04.1-base-arm64.tar.gz>`_.
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The following dependencies are not part of DPDK and must be installed
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separately:
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- **NXP Linux LSDK**
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NXP Layerscape software development kit (LSDK) includes support for family
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of QorIQ® ARM-Architecture-based system on chip (SoC) processors
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and corresponding boards.
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It includes the Linux board support packages (BSPs) for NXP SoCs,
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a fully operational tool chain, kernel and board specific modules.
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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>`_
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Driver compilation and testing
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Follow instructions available in the document
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:ref:`compiling and testing a PMD for a NIC <pmd_build_and_test>`
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to launch **testpmd**
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To compile in performance mode, please set ``CONFIG_RTE_CACHE_LINE_SIZE=64``
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