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diff --git a/src/plugins/marvell/README.rst b/src/plugins/marvell/README.rst new file mode 100644 index 00000000000..19cf1c49d0e --- /dev/null +++ b/src/plugins/marvell/README.rst @@ -0,0 +1,85 @@ +Marvell device plugin +===================== + +Overview +-------- + +This plugins provides native device support for Marvell PP2 network +device, by use of Marvell Usermode SDK +(`MUSDK <https://github.com/MarvellEmbeddedProcessors/musdk-marvell>`__). +Code is developed and tested on +`MACCHIATObin <http://macchiatobin.net>`__ board. + +Prerequisites +------------- + +Plugins depends on installed MUSDK and Marvell provided linux +`kernel <https://github.com/MarvellEmbeddedProcessors/linux-marvell>`__ +with MUSDK provided kernel patches (see ``patches/linux`` in musdk repo +and relevant documentation. Kernel version used: **4.14.22 +armada-18.09.3** MUSDK version used: **armada-18.09.3** Following kernel +modules from MUSDK must be loaded for plugin to work: \* +``musdk_cma.ko`` \* ``mv_pp_uio.ko`` + +Musdk 18.09.3 compilation steps +------------------------------- + +:: + + ./bootstrap + ./configure --prefix=/opt/vpp/external/aarch64/ CFLAGS="-Wno-error=unused-result -g -fPIC" --enable-shared=no + sed -i -e 's/marvell,mv-pp-uio/generic-uio/' modules/pp2/mv_pp_uio.c + sed -i -e 's/O_CREAT/O_CREAT, S_IRUSR | S_IWUSR/' src/lib/file_utils.c + make + sudo make install + +Usage +----- + +Interface Creation +~~~~~~~~~~~~~~~~~~ + +Interfaces are dynamically created with following CLI: + +:: + + create interface marvell pp2 name eth0 + set interface state mv-ppio-0/0 up + +Where ``eth0`` is linux interface name and ``mv-ppio-X/Y`` is VPP +interface name where X is PP2 device ID and Y is PPIO ID Interface needs +to be assigned to MUSDK in FDT configuration and linux interface state +must be up. + +Interface Deletion +~~~~~~~~~~~~~~~~~~ + +Interface can be deleted with following CLI: + +:: + + delete interface marvell pp2 <interface name> + +Interface Statistics +~~~~~~~~~~~~~~~~~~~~ + +Interface statistics can be displayed with +``sh hardware-interface mv-ppio0/0`` command. + +Interaction with DPDK plugin +~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +This plugin doesn’t have any dependency on DPDK or DPDK plugin but it +can work with DPDK plugin enabled or disabled. It is observed that +performance is better around 30% when DPDK plugin is disabled, as DPDK +plugin registers own buffer manager, which needs to deal with additional +metadata in each packet. + +DPKD plugin can be disabled by adding following config to the +startup.conf. + +:: + + plugins { + dpdk_plugin.so { disable } + } |