dpdk: add support for system libdpdk

Type: improvement

This patch enables dynamically linking the dpdk plugin against a
system-wide packaged version of dpdk.

Change-Id: I2276d125f39986b0e1788c7b52b94485cdbcd855
Signed-off-by: Nathan Moos <nmoos@cisco.com>

1 files changed, 96 insertions, 85 deletions

diff --git a/src/plugins/dpdk/CMakeLists.txt b/src/plugins/dpdk/CMakeLists.txt
index d63f116b206..7db6b094be7 100644
--- a/src/plugins/dpdk/CMakeLists.txt
+++ b/src/plugins/dpdk/CMakeLists.txt
@@ -12,93 +12,104 @@
 # limitations under the License.
 
 ##############################################################################
-# Find lib and include files
+# Check if we want to use the system DPDK
 ##############################################################################
-find_path(DPDK_INCLUDE_DIR PATH_SUFFIXES dpdk NAMES rte_config.h)
-vpp_plugin_find_library(dpdk DPDK_LIB "libdpdk.a")
-
-if (NOT DPDK_INCLUDE_DIR)
-  message(WARNING "-- DPDK headers not found - dpdk plugin disabled")
-  return()
-endif()
-
-if (NOT DPDK_LIB)
-  vpp_plugin_find_library(dpdk DPDK_SHLIB "libdpdk.so")
-  set(DPDK_IS_SHARED_LIB 1)
-  message(WARNING "-- linking dpdk plugin against DPDK shared libs")
-endif()
-
-##############################################################################
-# Parse DPDK config and version header files
-##############################################################################
-file(STRINGS ${DPDK_INCLUDE_DIR}/rte_config.h rte_config)
-file(STRINGS ${DPDK_INCLUDE_DIR}/rte_version.h rte_version)
-file(STRINGS ${DPDK_INCLUDE_DIR}/rte_build_config.h rte_build_config)
-
-foreach(l ${rte_config} ${rte_build_config} ${rte_version}})
-  if (l MATCHES "^#define[\t ]*RTE_")
-    STRING(REGEX REPLACE "^#define[\t ]*([A-Z1-9_]+)[\t ]*(.+)" "\\1;\\2" v "${l}")
-    list(GET v 0 name)
-    list(GET v 1 value)
-    set(DPDK_${name} ${value})
-  endif()
-endforeach()
-
-set(DPDK_VERSION
-    "${DPDK_RTE_VER_YEAR}.${DPDK_RTE_VER_MONTH}.${DPDK_RTE_VER_MINOR}")
-
-##############################################################################
-# verify headroom size
-##############################################################################
-if(NOT ${DPDK_RTE_PKTMBUF_HEADROOM} EQUAL ${PRE_DATA_SIZE})
-  message(
-    FATAL_ERROR
-    "DPDK RTE_PKTMBUF_HEADROOM (${DPDK_RTE_PKTMBUF_HEADROOM}) "
-     "must be equal to PRE_DATA_SIZE (${PRE_DATA_SIZE})"
-  )
-endif()
-
-##############################################################################
-# static or dynamic linking
-##############################################################################
-unset(DPDK_LINK_LIBRARIES)
-unset(DPDK_LINK_FLAGS)
-message(STATUS "Found DPDK ${DPDK_VERSION} in ${DPDK_INCLUDE_DIR}")
-include_directories (${DPDK_INCLUDE_DIR})
-
-if(DPDK_IS_SHARED_LIB)
-  get_filename_component(DPDK_LIB_DIR ${DPDK_SHLIB} DIRECTORY)
-  string_append(DPDK_LINK_FLAGS "-L${DPDK_LIB_DIR}")
-  list(APPEND DPDK_LINK_LIBRARIES ${DPDK_SHLIB})
+option(VPP_USE_SYSTEM_DPDK "Use the system installation of DPDK." OFF)
+if(VPP_USE_SYSTEM_DPDK)
+    find_package(PkgConfig REQUIRED)
+    pkg_check_modules(DPDK REQUIRED libdpdk)
+    message(WARNING "-- linking dpdk plugin against system libdpdk, version ${DPDK_VERSION}")
+    set(DPDK_LINK_FLAGS ${DPDK_LDFLAGS})
 else()
-  get_filename_component(DPDK_LIB_DIR ${DPDK_LIB} DIRECTORY)
-  string_append(DPDK_LINK_FLAGS "-L${DPDK_LIB_DIR}")
-  string_append(DPDK_LINK_FLAGS "-Wl,--whole-archive,${DPDK_LIB},--no-whole-archive")
-endif()
-
-##############################################################################
-# libnuma
-##############################################################################
-vpp_plugin_find_library(dpdk NUMA_LIB "numa")
-list(APPEND DPDK_LINK_LIBRARIES ${NUMA_LIB})
-
-##############################################################################
-# Mellanox libraries
-##############################################################################
-if(DPDK_RTE_LIBRTE_MLX4_PMD OR DPDK_RTE_LIBRTE_MLX5_PMD)
-  if (DPDK_RTE_IBVERBS_LINK_DLOPEN)
-    message(STATUS "DPDK depends on libmnl (Mellanox PMD requirement)")
-    vpp_plugin_find_library(dpdk MNL_LIB "mnl")
-    list(APPEND DPDK_LINK_LIBRARIES "${MNL_LIB}")
-  else()
-    message(WARNING "EXPERIMENTAL: DPDK plugin without dlopen mode")
-    vpp_plugin_find_library(dpdk IBVERBS_LIB "libibverbs.a")
-    vpp_plugin_find_library(dpdk MLX5_LIB "libmlx5.a")
-    vpp_plugin_find_library(dpdk MLX4_LIB "libmlx4.a")
-    vpp_plugin_find_library(dpdk CCAN_LIB "libccan.a")
-    vpp_plugin_find_library(dpdk RDMA_UTIL_LIB "rdma_util")
-    string_append(DPDK_LINK_FLAGS "-Wl,--whole-archive,${IBVERBS_LIB},${MLX5_LIB},${MLX4_LIB},${CCAN_LIB},${RDMA_UTIL_LIB},--no-whole-archive")
-  endif()
+    ##############################################################################
+    # Find lib and include files
+    ##############################################################################
+    find_path(DPDK_INCLUDE_DIR PATH_SUFFIXES dpdk NAMES rte_config.h)
+    vpp_plugin_find_library(dpdk DPDK_LIB "libdpdk.a")
+
+    if (NOT DPDK_INCLUDE_DIR)
+      message(WARNING "-- DPDK headers not found - dpdk plugin disabled")
+      return()
+    endif()
+
+    if (NOT DPDK_LIB)
+      vpp_plugin_find_library(dpdk DPDK_SHLIB "libdpdk.so")
+      set(DPDK_IS_SHARED_LIB 1)
+      message(WARNING "-- linking dpdk plugin against DPDK shared libs")
+    endif()
+
+    ##############################################################################
+    # Parse DPDK config and version header files
+    ##############################################################################
+    file(STRINGS ${DPDK_INCLUDE_DIR}/rte_config.h rte_config)
+    file(STRINGS ${DPDK_INCLUDE_DIR}/rte_version.h rte_version)
+    file(STRINGS ${DPDK_INCLUDE_DIR}/rte_build_config.h rte_build_config)
+
+    foreach(l ${rte_config} ${rte_build_config} ${rte_version}})
+      if (l MATCHES "^#define[\t ]*RTE_")
+        STRING(REGEX REPLACE "^#define[\t ]*([A-Z1-9_]+)[\t ]*(.+)" "\\1;\\2" v "${l}")
+        list(GET v 0 name)
+        list(GET v 1 value)
+        set(DPDK_${name} ${value})
+      endif()
+    endforeach()
+
+    set(DPDK_VERSION
+        "${DPDK_RTE_VER_YEAR}.${DPDK_RTE_VER_MONTH}.${DPDK_RTE_VER_MINOR}")
+
+    ##############################################################################
+    # verify headroom size
+    ##############################################################################
+    if(NOT ${DPDK_RTE_PKTMBUF_HEADROOM} EQUAL ${PRE_DATA_SIZE})
+      message(
+        FATAL_ERROR
+        "DPDK RTE_PKTMBUF_HEADROOM (${DPDK_RTE_PKTMBUF_HEADROOM}) "
+         "must be equal to PRE_DATA_SIZE (${PRE_DATA_SIZE})"
+      )
+    endif()
+
+    ##############################################################################
+    # static or dynamic linking
+    ##############################################################################
+    unset(DPDK_LINK_LIBRARIES)
+    unset(DPDK_LINK_FLAGS)
+    message(STATUS "Found DPDK ${DPDK_VERSION} in ${DPDK_INCLUDE_DIR}")
+    include_directories (${DPDK_INCLUDE_DIR})
+
+    if(DPDK_IS_SHARED_LIB)
+      get_filename_component(DPDK_LIB_DIR ${DPDK_SHLIB} DIRECTORY)
+      string_append(DPDK_LINK_FLAGS "-L${DPDK_LIB_DIR}")
+      list(APPEND DPDK_LINK_LIBRARIES ${DPDK_SHLIB})
+    else()
+      get_filename_component(DPDK_LIB_DIR ${DPDK_LIB} DIRECTORY)
+      string_append(DPDK_LINK_FLAGS "-L${DPDK_LIB_DIR}")
+      string_append(DPDK_LINK_FLAGS "-Wl,--whole-archive,${DPDK_LIB},--no-whole-archive")
+    endif()
+
+    ##############################################################################
+    # libnuma
+    ##############################################################################
+    vpp_plugin_find_library(dpdk NUMA_LIB "numa")
+    list(APPEND DPDK_LINK_LIBRARIES ${NUMA_LIB})
+
+    ##############################################################################
+    # Mellanox libraries
+    ##############################################################################
+    if(DPDK_RTE_LIBRTE_MLX4_PMD OR DPDK_RTE_LIBRTE_MLX5_PMD)
+      if (DPDK_RTE_IBVERBS_LINK_DLOPEN)
+        message(STATUS "DPDK depends on libmnl (Mellanox PMD requirement)")
+        vpp_plugin_find_library(dpdk MNL_LIB "mnl")
+        list(APPEND DPDK_LINK_LIBRARIES "${MNL_LIB}")
+      else()
+        message(WARNING "EXPERIMENTAL: DPDK plugin without dlopen mode")
+        vpp_plugin_find_library(dpdk IBVERBS_LIB "libibverbs.a")
+        vpp_plugin_find_library(dpdk MLX5_LIB "libmlx5.a")
+        vpp_plugin_find_library(dpdk MLX4_LIB "libmlx4.a")
+        vpp_plugin_find_library(dpdk CCAN_LIB "libccan.a")
+        vpp_plugin_find_library(dpdk RDMA_UTIL_LIB "rdma_util")
+        string_append(DPDK_LINK_FLAGS "-Wl,--whole-archive,${IBVERBS_LIB},${MLX5_LIB},${MLX4_LIB},${CCAN_LIB},${RDMA_UTIL_LIB},--no-whole-archive")
+      endif()
+    endif()
 endif()
 
 ##############################################################################