This doc describes how to enable DPDK on openwrt in both virtual and
physical x86 environment.
Signed-off-by: Xiaolong Ye <xiaolong...@intel.com>
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doc/guides/howto/openwrt.rst | 180 +++++++++++++++++++++++++++++++++++
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packet_capture_framework
telemetry
debug_troubleshoot
+ openwrt
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+.. SPDX-License-Identifier: BSD-3-Clause
+ Copyright(c) 2019 Intel Corporation.
+
+Enable DPDK on openwrt
+======================
+
+This document describes how to enable Data Plane Development Kit(DPDK) on
+Openwrt in both virtual and physical x86 environment.
+
+Introduction
+------------
+
+The OpenWrt project is a Linux operating system targeting embedded devices.
+Instead of trying to create a single, static firmware, OpenWrt provides a fully
+writable filesystem with package management. This frees user from the
+application selection and configuration provided by the vendor and allows user
+to customize the device through the use of packages to suit any application.
For
+developers, OpenWrt is the framework to build and application without having to
+build a complete firmware around it, for users this means the ability for full
+customization, to use the device in ways never envisioned.
+
+Pre-requisites
+~~~~~~~~~~~~~~
+
+You need gcc, binutils, bzip2, flex, python3.5+, perl, make, find, grep, diff,
+unzip, gawk, getopt, subversion, libz-dev and libc headers installed.
+
+Build OpenWrt
+-------------
+
+You can obtain OpenWrt image through https://downloads.openwrt.org/releases. To
+fully customize your own OpenWrt, it is highly recommended to build it through
+the source code, you can clone the OpenWrt source code by:
+
+.. code-block:: console
+
+ git clone https://git.openwrt.org/openwrt/openwrt.git
+
+OpenWrt configuration
+~~~~~~~~~~~~~~~~~~~~~
+
+* Select ``x86`` in ``Target System``
+* Select ``x86_64`` in ``Subtarget``
+* Select ``Build the OpenWrt SDK`` for cross-compilation environment
+* Select ``Use glibc`` in ``Advanced configuration options (for developers)``
+ -> ``ToolChain Options``
+ -> ``C Library implementation``
+
+Kernel configuration
+~~~~~~~~~~~~~~~~~~~~
+
+Below configurations need to be enabled:
+
+* CONFIG_UIO=y
+* CONFIG_HUGETLBFS=y
+* CONFIG_HUGETLB_PAGE=y
+* CONFIG_PAGE_MONITOR=y
+
+Build steps
+~~~~~~~~~~~
+
+1. Run ``./scripts/feeds update -a`` to obtain all the latest package
definitions
+defined in feeds.conf / feeds.conf.default
+
+2. Run ``./scripts/feeds install -a`` to install symlinks for all obtained
+packages into package/feeds/
+
+3. Run ``make menuconfig`` to select preferred configuration mentioned above
for
+the toolchain, target system & firmware packages.
+
+3. Run ``make kernel_menuconfig`` to select preferred kernel configurations.
+
+4. Run ``make`` to build your firmware. This will download all sources, build
+the cross-compile toolchain and then cross-compile the Linux kernel & all
+chosen applications for your target system.
+
+After build is done, you can find the images and sdk in ``<OpenWrt
Root>/bin/targets/x86/64-glibc/``.
+
+DPDK Cross Compilation for OpenWrt
+----------------------------------
+
+Pre-requisites
+~~~~~~~~~~~~~~
+
+NUMA is required to run dpdk in x86.
+
+.. note::
+
+ For compiling the NUMA lib, run libtool --version to ensure the libtool
version >= 2.2,
+ otherwise the compilation will fail with errors.
+
+.. code-block:: console
+
+ git clone https://github.com/numactl/numactl.git
+ cd numactl
+ git checkout v2.0.13 -b v2.0.13
+ ./autogen.sh
+ autoconf -i
+ export PATH=<OpenWrt
sdk>/glibc/openwrt-sdk-x86-64_gcc-8.3.0_glibc.Linux-x86_64/staging_dir/toolchain-x86_64_gcc-8.3.0_glibc/bin/:$PATH
+ ./configure CC=x86_64-openwrt-linux-gnu-gcc --prefix=<OpenWrt SDK
toolchain dir>
+ make install
+
+The numa header files and lib file is generated in the include and lib folder
respectively under <OpenWrt SDK toolchain dir>.
+
+Build DPDK
+~~~~~~~~~~
+
+.. code-block:: console
+
+ export STAGING_DIR=<OpenWrt
sdk>/glibc/openwrt-sdk-x86-64_gcc-8.3.0_glibc.Linux-x86_64/staging_dir
+ export RTE_SDK=`pwd`
+ export RTE_KERNELDIR=<OpenWrt
Root>/build_dir/target-x86_64_glibc/linux-x86_64/linux-4.19.81/
+ make config T=x86_64-native-linuxapp-gcc
+ make -j 100 CROSS=x86_64-openwrt-linux-gnu-
+
+Running DPDK application on OpenWrt
+-----------------------------------
+
+Virtual machine
+~~~~~~~~~~~~~~~
+
+* Extract boot image
+
+.. code-block:: console
+
+ gzip -d openwrt-x86-64-combined-ext4.img.gz
+
+* Launch Qemu
+
+.. code-block:: console
+
+ qemu-system-x86_64 \
+ -cpu host \
+ -smp 8 \
+ -enable-kvm \
+ -M q35 \
+ -m 2048M \
+ -object
memory-backend-file,id=mem,size=2048M,mem-path=/tmp/hugepages,share=on \
+ -drive file=<Your OpenWrt images
folder>/openwrt-x86-64-combined-ext4.img,id=d0,if=none,bus=0,unit=0 \
+ -device ide-hd,drive=d0,bus=ide.0 \
+ -net nic,vlan=0 \
+ -net nic,vlan=1 \
+ -net user,vlan=1 \
+ -display none \
+
+
+Physical machine
+~~~~~~~~~~~~~~~~
+
+Installation
+
+If you are using Windows PC, you can use some free and opensource raw disk
image writer program such as
+``Win32 Disk Imager`` and ``Etcher`` to write OpenWrt image
(openwrt-x86-64-combined-ext4.img) to a USB
+flash driver or USB SDcard with SDcard or a Sata hard drivre or SSD from your
PC.
+
+If you are using Linux, you can use old dd tool to write OpenWrt image to the
drive you want to write the
+image on.
+
+.. code-block:: console
+
+ dd if=openwrt-18.06.1-x86-64-combined-squashfs.img of=/dev/sdX
+
+Where sdX is name of the drive. (You can find it though ``fdisk -l``)
+
+Running DPDK
+~~~~~~~~~~~~
+
+* Setup dpdk environment
+
+ * Scp built numa libraries (including soft link) to /usr/lib64
+ * Setup hugepages
+ * insmod igb_uio.ko (scp the built igb_uio.ko first)
+ * Bind the NIC to igb_uio.ko
+
+* Launch testpmd
+
+ * scp built testpmd to qemu
+ * ./testpmd -c 0xf -- -i
+
+ More detailed info about how to run a DPDK application refer to ``Running
DPDK Applications`` section of :ref:`the DPDK documentation <linux_gsg>`.
--
2.17.1
