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.. SPDX-License-Identifier: BSD-3-Clause
Copyright(c) 2018 Marvell International Ltd.
Copyright(c) 2018 Semihalf.
All rights reserved.
MVNETA Poll Mode Driver
=======================
The MVNETA PMD (librte_pmd_mvneta) provides poll mode driver support
for the Marvell NETA 1/2.5 Gbps adapter.
Detailed information about SoCs that use PPv2 can be obtained here:
* https://www.marvell.com/embedded-processors/armada-3700/
.. Note::
Due to external dependencies, this driver is disabled by default. It must
be enabled manually by setting relevant configuration option manually.
Please refer to `Config File Options`_ section for further details.
Features
--------
Features of the MVNETA PMD are:
- Start/stop
- tx/rx_queue_setup
- tx/rx_burst
- Speed capabilities
- Jumbo frame
- MTU update
- Promiscuous mode
- Unicast MAC filter
- Link status
- CRC offload
- L3 checksum offload
- L4 checksum offload
- Packet type parsing
- Basic stats
Limitations
-----------
- Flushing vlans added for filtering is not possible due to MUSDK missing
functionality. Current workaround is to reset board so that NETA has a
chance to start in a sane state.
Prerequisites
-------------
- Custom Linux Kernel sources
.. code-block:: console
git clone https://github.com/MarvellEmbeddedProcessors/linux-marvell.git -b linux-4.4.120-armada-18.09
- MUSDK (Marvell User-Space SDK) sources
.. code-block:: console
git clone https://github.com/MarvellEmbeddedProcessors/musdk-marvell.git -b musdk-armada-18.09
MUSDK is a light-weight library that provides direct access to Marvell's
NETA. Alternatively prebuilt MUSDK library can be
requested from `Marvell Extranet <https://extranet.marvell.com>`_. Once
approval has been granted, library can be found by typing ``musdk`` in
the search box.
MUSDK must be configured with the following features:
.. code-block:: console
--enable-pp2=no --enable-neta
- DPDK environment
Follow the DPDK :ref:`Getting Started Guide for Linux <linux_gsg>` to setup
DPDK environment.
Pre-Installation Configuration
------------------------------
Config File Options
~~~~~~~~~~~~~~~~~~~
The following options can be modified in the ``config`` file.
- ``CONFIG_RTE_LIBRTE_MVNETA_PMD`` (default ``n``)
Toggle compilation of the librte_pmd_mvneta driver.
Runtime options
~~~~~~~~~~~~~~~
The following ``devargs`` options can be enabled at runtime. They must
be passed as part of EAL arguments.
- ``iface`` (mandatory, with no default value)
The name of port (owned by MUSDK) that should be enabled in DPDK.
This options can be repeated resulting in a list of ports to be
enabled. For instance below will enable ``eth0`` and ``eth1`` ports.
.. code-block:: console
./testpmd --vdev=net_mvneta,iface=eth0,iface=eth1 \
-c 3 -- -i --p 3 -a
Building DPDK
-------------
Driver needs precompiled MUSDK library during compilation.
.. code-block:: console
export CROSS_COMPILE=<toolchain>/bin/aarch64-linux-gnu-
./bootstrap
./configure --host=aarch64-linux-gnu --enable-pp2=no --enable-neta
make install
MUSDK will be installed to `usr/local` under current directory.
For the detailed build instructions please consult ``doc/musdk_get_started.txt``.
Before the DPDK build process the environmental variable ``LIBMUSDK_PATH`` with
the path to the MUSDK installation directory needs to be exported.
.. code-block:: console
export LIBMUSDK_PATH=<musdk>/usr/local
export CROSS=aarch64-linux-gnu-
make config T=arm64-armv8a-linuxapp-gcc
sed -ri 's,(MVNETA_PMD=)n,\1y,' build/.config
make
Usage Example
-------------
MVNETA PMD requires extra out of tree kernel modules to function properly.
`musdk_uio` and `mv_neta_uio` sources are part of the MUSDK. Please consult
``doc/musdk_get_started.txt`` for the detailed build instructions.
.. code-block:: console
insmod musdk_uio.ko
insmod mv_neta_uio.ko
Additionally interfaces used by DPDK application need to be put up:
.. code-block:: console
ip link set eth0 up
ip link set eth1 up
In order to run testpmd example application following command can be used:
.. code-block:: console
./testpmd --vdev=net_mvneta,iface=eth0,iface=eth1 -c 3 -- \
-i --p 3 -a --txd 256 --rxd 128 --rxq=1 --txq=1 --nb-cores=1
In order to run l2fwd example application following command can be used:
.. code-block:: console
./l2fwd --vdev=net_mvneta,iface=eth0,iface=eth1 -c 3 -- -T 1 -p 3
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