On 11/29, Stephen Hemminger wrote: >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.
Make sense, I'll use links for those steps. Thanks, Xiaolong
