cmake: DPDK rte_config.h parsing

Change-Id: I53cad8e7787a132a5d6bacd5fda3fe67b7d59b44
Signed-off-by: Damjan Marion <damarion@cisco.com>

1 files changed, 36 insertions, 12 deletions

diff --git a/src/plugins/dpdk/CMakeLists.txt b/src/plugins/dpdk/CMakeLists.txt
index e1494492628..5f468110e50 100644
--- a/src/plugins/dpdk/CMakeLists.txt
+++ b/src/plugins/dpdk/CMakeLists.txt
@@ -21,39 +21,60 @@ find_library(DPDK_LIB NAMES libdpdk.a HINTS ${DPDK_LIB_DIR_HINT})
 ##############################################################################
 # Find DPDK Version
 ##############################################################################
-file(WRITE ${CMAKE_CURRENT_BINARY_DIR}/dpdk_version.c
+file(WRITE ${CMAKE_CURRENT_BINARY_DIR}/dpdk_vars.c
 "
 #include <stdio.h>
 #include <rte_version.h>
 int main()
 {
-  puts(strchr(rte_version(), ' ') + 1);
+  printf(\"VERSION=%s\\n\", strchr(rte_version(), ' ') + 1);
+  printf(\"RTE_PKTMBUF_HEADROOM=%u\\n\", RTE_PKTMBUF_HEADROOM);
+#ifdef RTE_LIBRTE_PMD_AESNI_MB
+  printf(\"RTE_LIBRTE_PMD_AESNI_MB=%u\\n\", RTE_LIBRTE_PMD_AESNI_MB);
+#endif
+#ifdef RTE_LIBRTE_PMD_AESNI_GCM
+  printf(\"RTE_LIBRTE_PMD_AESNI_GCM=%u\\n\", RTE_LIBRTE_PMD_AESNI_GCM);
+#endif
   return 0;
 }
 ")
 
-try_compile(DPDK_VERSION_COMPILED
+try_compile(DPDK_VARS_COMPILED
   ${CMAKE_CURRENT_BINARY_DIR}
-  ${CMAKE_CURRENT_BINARY_DIR}/dpdk_version.c
+  ${CMAKE_CURRENT_BINARY_DIR}/dpdk_vars.c
   CMAKE_FLAGS
   -DINCLUDE_DIRECTORIES=${DPDK_INCLUDE_DIR}
-  COPY_FILE ${CMAKE_CURRENT_BINARY_DIR}/dpdk_version.bin
+  COPY_FILE ${CMAKE_CURRENT_BINARY_DIR}/dpdk_vars.bin
 )
 
-if(DPDK_VERSION_COMPILED)
+if(DPDK_VARS_COMPILED)
   execute_process(
     WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
-    COMMAND ./dpdk_version.bin
-    OUTPUT_VARIABLE DPDK_VERSION
+    COMMAND ./dpdk_vars.bin
+    OUTPUT_VARIABLE DPDK_VARS
     OUTPUT_STRIP_TRAILING_WHITESPACE
   )
+  string(REPLACE "\n" ";" DPDK_VARS ${DPDK_VARS})
+  foreach(v ${DPDK_VARS})
+    string(REPLACE "=" ";" v ${v})
+    list(GET v 0 name)
+    list(GET v 1 value)
+    set(DPDK_${name} ${value})
+  endforeach()
 endif()
 
 file(REMOVE
-  ${CMAKE_CURRENT_BINARY_DIR}/dpdk_version.c
-  ${CMAKE_CURRENT_BINARY_DIR}/dpdk_version.bin
+  ${CMAKE_CURRENT_BINARY_DIR}/dpdk_vars.c
+  ${CMAKE_CURRENT_BINARY_DIR}/dpdk_vars.bin
 )
 
+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()
 
 ##############################################################################
 # DPDK plugin
@@ -88,12 +109,15 @@ if(DPDK_INCLUDE_DIR AND DPDK_LIB)
     device/node.c
   )
 
+  message("-- Found DPDK ${DPDK_VERSION} in ${DPDK_INCLUDE_DIR}")
   get_filename_component(DPDK_LIB_DIR ${DPDK_LIB} DIRECTORY)
   set(DPDK_LINK_FLAGS "-L${DPDK_LIB_DIR} -Wl,--whole-archive,${DPDK_LIB},--no-whole-archive")
-  set(DPDK_LINK_FLAGS "${DPDK_LINK_FLAGS} -Wl,--exclude-libs,libIPSec_MB.a,-l:libIPSec_MB.a")
+  if(DPDK_RTE_LIBRTE_PMD_AESNI_MB OR DPDK_RTE_LIBRTE_PMD_AESNI_GCM)
+    set(DPDK_LINK_FLAGS "${DPDK_LINK_FLAGS} -Wl,--exclude-libs,libIPSec_MB.a,-l:libIPSec_MB.a")
+    message("-- DPDK depends on IPSec MB library")
+  endif()
   set(DPDK_LINK_FLAGS "${DPDK_LINK_FLAGS} -Wl,-lnuma")
   set_target_properties(dpdk_plugin PROPERTIES LINK_FLAGS "${DPDK_LINK_FLAGS}")
-  message("-- Found DPDK ${DPDK_VERSION}: ${DPDK_INCLUDE_DIR} ${DPDK_LIB}")
 else()
   message("-- DPDK not found - dpdk_plugin disabled")
 endif()