#!/bin/bash

source configlib.sh

# Generates arch configurations in the current directory based on

# 1. an openvswitch.spec file

# 2. an expanded dpdk tree

if (( $# != 2 )); then

    echo "$0: openvswitch.spec dpdk_tree" >&2

    exit 1

fi

OVSSPEC="$1"

DPDKDIR="$2"

# accumulate all arch + name triples

OVS_DPDK_CONF_MACH_ARCH=()

for arch in $(grep %define\ dpdk_mach_arch "$OVSSPEC" | sed 's@%define dpdk_mach_arch @@')

do

    OVS_DPDK_CONF_MACH_ARCH+=($arch)

done

OVS_DPDK_CONF_MACH_TMPL=()

for tmpl in $(grep %define\ dpdk_mach_tmpl "$OVSSPEC" | sed 's@%define dpdk_mach_tmpl @@')

do

    OVS_DPDK_CONF_MACH_TMPL+=($tmpl)

done

OVS_DPDK_CONF_MACH=()

for mach in $(grep %define\ dpdk_mach\  "$OVSSPEC" | sed 's@%define dpdk_mach @@')

do

    OVS_DPDK_CONF_MACH+=($mach)

done

OVS_DPDK_TARGETS=()

for ((i=0; i < ${#OVS_DPDK_CONF_MACH[@]}; i++));

do

    OVS_DPDK_TARGETS+=("${OVS_DPDK_CONF_MACH_ARCH[$i]}-${OVS_DPDK_CONF_MACH_TMPL[$i]}-linuxapp-gcc")

    echo "DPDK-target: ${OVS_DPDK_TARGETS[$i]}"

done

OUTPUT_DIR=$(pwd)

pushd "$DPDKDIR"

for ((i=0; i < ${#OVS_DPDK_TARGETS[@]}; i++));

do

    echo "For ${OVS_DPDK_TARGETS[$i]}:"

    echo "     a. Generating initial config"

    echo "        make V=1 T=${OVS_DPDK_TARGETS[$i]} O=${OVS_DPDK_TARGETS[$i]}"

    make V=1 T=${OVS_DPDK_TARGETS[$i]} O=${OVS_DPDK_TARGETS[$i]} -j8 config

    ORIG_SHA=""

    OUTDIR="${OVS_DPDK_TARGETS[$i]}"

    echo "     b. calculating and applying sha"

    calc_sha ORIG_SHA "${OUTDIR}/.config"

    if [ "$ORIG_SHA" == "" ]; then

        echo "ERROR: Unable to get sha for arch ${OVS_DPDK_TARGETS[$i]}"

        exit 1

    fi

    echo "# -*- cfg-sha: ${ORIG_SHA}" > ${OUTDIR}/.config.new

    cat "${OUTDIR}/.config" >> "${OUTDIR}/.config.new"

    cp "${OUTDIR}/.config" "${OUTDIR}/.config.orig"

    mv -f "${OUTDIR}/.config.new" "${OUTDIR}/.config"

    echo "     c. setting initial configurations"

    # these are the original setconf values from openvswitch.spec

    set_conf "${OUTDIR}" CONFIG_RTE_MACHINE "\\\"${OVS_DPDK_CONF_MACH[$i]}\\\""

    # Disable DPDK libraries not needed by OVS

    set_conf "${OUTDIR}" CONFIG_RTE_LIBRTE_TIMER n

    set_conf "${OUTDIR}" CONFIG_RTE_LIBRTE_CFGFILE n

    set_conf "${OUTDIR}" CONFIG_RTE_LIBRTE_JOBSTATS n

    set_conf "${OUTDIR}" CONFIG_RTE_LIBRTE_LPM n

    set_conf "${OUTDIR}" CONFIG_RTE_LIBRTE_ACL n

    set_conf "${OUTDIR}" CONFIG_RTE_LIBRTE_POWER n

    set_conf "${OUTDIR}" CONFIG_RTE_LIBRTE_DISTRIBUTOR n

    set_conf "${OUTDIR}" CONFIG_RTE_LIBRTE_REORDER n

    set_conf "${OUTDIR}" CONFIG_RTE_LIBRTE_PORT n

    set_conf "${OUTDIR}" CONFIG_RTE_LIBRTE_TABLE n

    set_conf "${OUTDIR}" CONFIG_RTE_LIBRTE_PIPELINE n

    set_conf "${OUTDIR}" CONFIG_RTE_LIBRTE_KNI n

    set_conf "${OUTDIR}" CONFIG_RTE_LIBRTE_CRYPTODEV n

    set_conf "${OUTDIR}" CONFIG_RTE_LIBRTE_SECURITY n

    set_conf "${OUTDIR}" CONFIG_RTE_LIBRTE_FLOW_CLASSIFY n

    # Disable virtio user as not used by OVS

    set_conf "${OUTDIR}" CONFIG_RTE_VIRTIO_USER n

    # Enable DPDK libraries needed by OVS

    set_conf "${OUTDIR}" CONFIG_RTE_LIBRTE_VHOST_NUMA y

    # start by disabling ALL PMDs

    for pmd in $(grep _PMD= "${OUTDIR}/.config" | sed 's@=\(y\|n\)@@g')

    do

        set_conf "${OUTDIR}" $pmd n

    done

    # PMDs which have their own naming scheme

    # the default for this was 'n' at one point.  Make sure we keep it

    # as such

    set_conf "${OUTDIR}" CONFIG_RTE_LIBRTE_PMD_QAT n

    set_conf "${OUTDIR}" CONFIG_RTE_LIBRTE_PMD_OCTEONTX_SSOVF n

    set_conf "${OUTDIR}" CONFIG_RTE_LIBRTE_PMD_VHOST n

    set_conf "${OUTDIR}" CONFIG_RTE_LIBRTE_PMD_KNI n

    set_conf "${OUTDIR}" CONFIG_RTE_LIBRTE_PMD_XENVIRT n

    set_conf "${OUTDIR}" CONFIG_RTE_LIBRTE_PMD_NULL_CRYPTO n

    set_conf "${OUTDIR}" CONFIG_RTE_LIBRTE_PMD_NULL n

    set_conf "${OUTDIR}" CONFIG_RTE_LIBRTE_PMD_TAP n

    set_conf "${OUTDIR}" CONFIG_RTE_LIBRTE_PMD_CRYPTO_SCHEDULER n

    set_conf "${OUTDIR}" CONFIG_RTE_LIBRTE_PMD_SKELETON_EVENTDEV n

    set_conf "${OUTDIR}" CONFIG_RTE_LIBRTE_PMD_SW_EVENTDEV n

    set_conf "${OUTDIR}" CONFIG_RTE_LIBRTE_PMD_PCAP n

    set_conf "${OUTDIR}" CONFIG_RTE_LIBRTE_PMD_BOND n

    set_conf "${OUTDIR}" CONFIG_RTE_LIBRTE_PMD_AF_PACKET n

    # whitelist of enabled PMDs

    # Soft PMDs to enable

    set_conf "${OUTDIR}" CONFIG_RTE_LIBRTE_PMD_RING y

    set_conf "${OUTDIR}" CONFIG_RTE_LIBRTE_VIRTIO_PMD y

    # HW PMDs

    set_conf "${OUTDIR}" CONFIG_RTE_LIBRTE_I40E_PMD y

    case "${OVS_DPDK_CONF_MACH_ARCH[i]}" in

    x86_64)

        set_conf "${OUTDIR}" CONFIG_RTE_LIBRTE_ENIC_PMD y

        ;&

    arm64)

        set_conf "${OUTDIR}" CONFIG_RTE_LIBRTE_IXGBE_PMD y

        set_conf "${OUTDIR}" CONFIG_RTE_LIBRTE_IGB_PMD y

        ;;

    esac

    # Disable kernel modules

    set_conf "${OUTDIR}" CONFIG_RTE_EAL_IGB_UIO n

    set_conf "${OUTDIR}" CONFIG_RTE_KNI_KMOD n

    # Disable experimental stuff

    set_conf "${OUTDIR}" CONFIG_RTE_NEXT_ABI n

    cp "${OUTDIR}/.config" "${OUTPUT_DIR}/${OVS_DPDK_TARGETS[$i]}-config"

done

popd >/dev/null

echo -n "For each arch ( "

for ((i=0; i < ${#OVS_DPDK_CONF_MACH_ARCH[@]}; i++));

do

    echo -n "${OVS_DPDK_CONF_MACH_ARCH[i]} "

done

echo "):"

echo "1. ensure you enable the requisite hw"