+
+AC_MSG_CHECKING([whether to enable OpenIB gen2 support])
+# set default
+AC_ARG_WITH([o2ib],
+ AC_HELP_STRING([--with-o2ib=path],
+ [build o2iblnd against path]),
+ [
+ case $with_o2ib in
+ yes) O2IBPATHS="$LINUX $LINUX/drivers/infiniband"
+ ENABLEO2IB=2
+ ;;
+ no) ENABLEO2IB=0
+ ;;
+ *) O2IBPATHS=$with_o2ib
+ ENABLEO2IB=3
+ ;;
+ esac
+ ],[
+ O2IBPATHS="$LINUX $LINUX/drivers/infiniband"
+ ENABLEO2IB=1
+ ])
+if test $ENABLEO2IB -eq 0; then
+ AC_MSG_RESULT([disabled])
+else
+ o2ib_found=false
+ for O2IBPATH in $O2IBPATHS; do
+ if test \( -f ${O2IBPATH}/include/rdma/rdma_cm.h -a \
+ -f ${O2IBPATH}/include/rdma/ib_cm.h -a \
+ -f ${O2IBPATH}/include/rdma/ib_verbs.h -a \
+ -f ${O2IBPATH}/include/rdma/ib_fmr_pool.h \); then
+ if test \( -d ${O2IBPATH}/kernel_patches -a \
+ -f ${O2IBPATH}/Makefile \); then
+ AC_MSG_RESULT([no])
+ AC_MSG_ERROR([you appear to be trying to use the OFED distribution's source directory (${O2IBPATH}) rather than the "development/headers" directory which is likely in ${O2IBPATH%-*}])
+ fi
+ o2ib_found=true
+ break
+ fi
+ done
+ if ! $o2ib_found; then
+ AC_MSG_RESULT([no])
+ case $ENABLEO2IB in
+ 1) ;;
+ 2) AC_MSG_ERROR([kernel OpenIB gen2 headers not present]);;
+ 3) AC_MSG_ERROR([bad --with-o2ib path]);;
+ *) AC_MSG_ERROR([internal error]);;
+ esac
+ else
+ O2IBCPPFLAGS="-I$O2IBPATH/include"
+ EXTRA_KCFLAGS_save="$EXTRA_KCFLAGS"
+ EXTRA_KCFLAGS="$EXTRA_KCFLAGS $O2IBCPPFLAGS"
+ EXTRA_LNET_INCLUDE="$EXTRA_LNET_INCLUDE $O2IBCPPFLAGS"
+
+ LB_LINUX_TRY_COMPILE([
+ #include <linux/version.h>
+ #include <linux/pci.h>
+ #if !HAVE_GFP_T
+ typedef int gfp_t;
+ #endif
+ #include <rdma/rdma_cm.h>
+ #include <rdma/ib_cm.h>
+ #include <rdma/ib_verbs.h>
+ #include <rdma/ib_fmr_pool.h>
+ ],[
+ struct rdma_cm_id *cm_id;
+ struct rdma_conn_param conn_param;
+ struct ib_device_attr device_attr;
+ struct ib_qp_attr qp_attr;
+ struct ib_pool_fmr pool_fmr;
+ enum ib_cm_rej_reason rej_reason;
+
+ #ifdef HAVE_RDMA_CREATE_ID_4ARG
+ cm_id = rdma_create_id(NULL, NULL, RDMA_PS_TCP, 0);
+ #else
+ cm_id = rdma_create_id(NULL, NULL, RDMA_PS_TCP);
+ #endif
+ return PTR_ERR(cm_id);
+ ],[
+ AC_MSG_RESULT([yes])
+ O2IBLND="o2iblnd"
+ ],[
+ AC_MSG_RESULT([no])
+ case $ENABLEO2IB in
+ 1) ;;
+ 2) AC_MSG_ERROR([can't compile with kernel OpenIB gen2 headers]);;
+ 3) AC_MSG_ERROR([can't compile with OpenIB gen2 headers under $O2IBPATH]);;
+ *) AC_MSG_ERROR([internal error]);;
+ esac
+ O2IBLND=""
+ O2IBCPPFLAGS=""
+ ])
+ # we know at this point that the found OFED source is good
+ O2IB_SYMVER=""
+ if test $ENABLEO2IB -eq 3 ; then
+ # OFED default rpm not handle sles10 Modules.symvers name
+ for name in Module.symvers Modules.symvers; do
+ if test -f $O2IBPATH/$name; then
+ O2IB_SYMVER=$name;
+ break;
+ fi
+ done
+ if test -n "$O2IB_SYMVER"; then
+ AC_MSG_NOTICE([adding $O2IBPATH/$O2IB_SYMVER to $PWD/$SYMVERFILE])
+ # strip out the existing symbols versions first
+ if test -f $PWD/$SYMVERFILE; then
+ egrep -v $(echo $(awk '{ print $2 }' $O2IBPATH/$O2IB_SYMVER) | tr ' ' '|') $PWD/$SYMVERFILE > $PWD/$SYMVERFILE.old
+ else
+ touch $PWD/$SYMVERFILE.old
+ fi
+ cat $PWD/$SYMVERFILE.old $O2IBPATH/$O2IB_SYMVER > $PWD/$SYMVERFILE
+ rm $PWD/$SYMVERFILE.old
+ else
+ AC_MSG_ERROR([an external source tree was specified for o2iblnd however I could not find a $O2IBPATH/Module.symvers there])
+ fi
+ fi
+
+ LN_CONFIG_OFED_SPEC
+ EXTRA_KCFLAGS="$EXTRA_KCFLAGS_save"
+ fi
+fi
+
+AC_SUBST(EXTRA_LNET_INCLUDE)
+AC_SUBST(O2IBCPPFLAGS)
+AC_SUBST(O2IBLND)