On Fri, 29 Nov 2019 16:19:11 +0800 Xiaolong Ye <xiaolong...@intel.com> wrote:
> This doc describes how to enable DPDK on openwrt in both virtual and > physical x86 environment. > > Signed-off-by: Xiaolong Ye <xiaolong...@intel.com> > --- > doc/guides/howto/index.rst | 1 + > doc/guides/howto/openwrt.rst | 180 +++++++++++++++++++++++++++++++++++ > 2 files changed, 181 insertions(+) > create mode 100644 doc/guides/howto/openwrt.rst > > diff --git a/doc/guides/howto/index.rst b/doc/guides/howto/index.rst > index a4c131652..5a97ea508 100644 > --- a/doc/guides/howto/index.rst > +++ b/doc/guides/howto/index.rst > @@ -19,3 +19,4 @@ HowTo Guides > packet_capture_framework > telemetry > debug_troubleshoot > + openwrt > diff --git a/doc/guides/howto/openwrt.rst b/doc/guides/howto/openwrt.rst > new file mode 100644 > index 000000000..62be3a031 > --- /dev/null > +++ b/doc/guides/howto/openwrt.rst > @@ -0,0 +1,180 @@ > +.. 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>`. It is good to have more documentation and examples. My one concern is that a lot of this overlaps existing documents and is likely to get out of date. Could you use links instead to describe how to install OpenWrt and how to run testpmd.
