DPDK: add support for v2.0.0

Update relevant artifacts to add support for DPDK v2.0.0
 - INSTALL.DPDK.md
 - travis build script
 - acinclude.m4: add 'mssse3' flag to OVS_CFLAGS
 - netdev-dpdk: fix build with unified offload types in DPDK v2.0.0

Note that this breaks compatibility with DPDK v1.8.0

Signed-off-by: Mark Kavanagh <mark.b.kavanagh@intel.com>
Signed-off-by: Panu Matilainen <pmatilai@redhat.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>

.travis/build.sh

@@ -49,6 +49,7 @@ function install_dpdk()
     find ./ -type f | xargs sed -i 's/max-inline-insns-single=100/max-inline-insns-single=400/'
     sed -ri 's,(CONFIG_RTE_BUILD_COMBINE_LIBS=).*,\1y,' config/common_linuxapp
     sed -ri 's,(CONFIG_RTE_LIBRTE_VHOST=).*,\1y,' config/common_linuxapp
+    sed -ri 's,(CONFIG_RTE_LIBRTE_VHOST_USER=).*,\1n,' config/common_linuxapp
     sed -ri '/CONFIG_RTE_LIBNAME/a CONFIG_RTE_BUILD_FPIC=y' config/common_linuxapp
     sed -ri '/EXECENV_CFLAGS  = -pthread -fPIC/{s/$/\nelse ifeq ($(CONFIG_RTE_BUILD_FPIC),y)/;s/$/\nEXECENV_CFLAGS  = -pthread -fPIC/}' mk/exec-env/linuxapp/rte.vars.mk
     make config CC=gcc T=x86_64-native-linuxapp-gcc
@@ -68,12 +69,14 @@ fi
 
 if [ "$DPDK" ]; then
     if [ -z "$DPDK_VER" ]; then
-        DPDK_VER="1.8.0"
+        DPDK_VER="2.0.0"
     fi
     install_dpdk $DPDK_VER
-    # Disregard bad function casts until DPDK is fixed
-    CFLAGS="$CFLAGS -Wno-error=bad-function-cast -Wno-error=cast-align"
-    EXTRA_OPTS+="--with-dpdk=./dpdk-$DPDK_VER/build"
+    if [ "$CC" = "clang" ]; then
+        # Disregard cast alignment errors until DPDK is fixed
+        EXTRA_OPTS="$EXTRA_OPTS -Wno-cast-align"
+    fi
+    EXTRA_OPTS="$EXTRA_OPTS --with-dpdk=./dpdk-$DPDK_VER/build"
 elif [ "$CC" != "clang" ]; then
     # DPDK headers currently trigger sparse errors
     SPARSE_FLAGS="$SPARSE_FLAGS -Wsparse-error"

INSTALL.DPDK.md

@@ -16,13 +16,13 @@ OVS needs a system with 1GB hugepages support.
 Building and Installing:
 ------------------------
 
-Required DPDK 1.8.0, `fuse`, `fuse-devel` (`libfuse-dev` on Debian/Ubuntu)
+Required DPDK 2.0, `fuse`, `fuse-devel` (`libfuse-dev` on Debian/Ubuntu)
 
 1. Configure build & install DPDK:
   1. Set `$DPDK_DIR`
 
      ```
-     export DPDK_DIR=/usr/src/dpdk-1.8.0
+     export DPDK_DIR=/usr/src/dpdk-2.0
      cd $DPDK_DIR
      ```
 
@@ -32,9 +32,12 @@ Required DPDK 1.8.0, `fuse`, `fuse-devel` (`libfuse-dev` on Debian/Ubuntu)
      `CONFIG_RTE_BUILD_COMBINE_LIBS=y`
 
      Update `config/common_linuxapp` so that DPDK is built with vhost
-     libraries:
+     libraries; currently, OVS only supports vhost-cuse, so DPDK vhost-user
+     libraries should be explicitly turned off (they are enabled by default
+     in DPDK 2.0).
 
      `CONFIG_RTE_LIBRTE_VHOST=y`
+     `CONFIG_RTE_LIBRTE_VHOST_USER=n`
 
      Then run `make install` to build and install the library.
      For default install without IVSHMEM:
@@ -65,10 +68,12 @@ Required DPDK 1.8.0, `fuse`, `fuse-devel` (`libfuse-dev` on Debian/Ubuntu)
    ```
    cd $(OVS_DIR)/openvswitch
    ./boot.sh
-   ./configure --with-dpdk=$DPDK_BUILD
+   ./configure --with-dpdk=$DPDK_BUILD [CFLAGS="-g -O2 -Wno-cast-align"]
    make
    ```
 
+   Note: 'clang' users may specify the '-Wno-cast-align' flag to suppress DPDK cast-align warnings.
+
 To have better performance one can enable aggressive compiler optimizations and
 use the special instructions(popcnt, crc32) that may not be available on all
 machines. Instead of typing `make`, type:

acinclude.m4

@@ -205,7 +205,7 @@ AC_DEFUN([OVS_CHECK_DPDK], [
     CFLAGS="$ovs_save_CFLAGS"
     LDFLAGS="$ovs_save_LDFLAGS"
     OVS_LDFLAGS="$OVS_LDFLAGS -L$DPDK_LIB_DIR"
-    OVS_CFLAGS="$OVS_CFLAGS -I$DPDK_INCLUDE"
+    OVS_CFLAGS="$OVS_CFLAGS -I$DPDK_INCLUDE -mssse3"
 
     # DPDK pmd drivers are not linked unless --whole-archive is used.
     #

lib/netdev-dpdk.c

@@ -117,8 +117,7 @@ static const struct rte_eth_conf port_conf = {
     .rx_adv_conf = {
         .rss_conf = {
             .rss_key = NULL,
-            .rss_hf = ETH_RSS_IPV4_TCP | ETH_RSS_IPV4 | ETH_RSS_IPV6
-                    | ETH_RSS_IPV4_UDP | ETH_RSS_IPV6_TCP | ETH_RSS_IPV6_UDP,
+            .rss_hf = ETH_RSS_IP | ETH_RSS_UDP | ETH_RSS_TCP,
         },
     },
     .txmode = {