lib/userspace-tso.c

   1 /*
   2  * Copyright (c) 2020 Red Hat, Inc.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at:
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #include <config.h>
  18
  19 #include "smap.h"
  20 #include "ovs-thread.h"
  21 #include "openvswitch/vlog.h"
  22 #include "dpdk.h"
  23 #include "userspace-tso.h"
  24 #include "vswitch-idl.h"
  25
  26 VLOG_DEFINE_THIS_MODULE(userspace_tso);
  27
  28 static bool userspace_tso = false;
  29
  30 void
  31 userspace_tso_init(const struct smap *ovs_other_config)
  32 {
  33     if (smap_get_bool(ovs_other_config, "userspace-tso-enable", false)) {
  34         static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER;
  35
  36         if (ovsthread_once_start(&once)) {
  37             VLOG_INFO("Userspace TCP Segmentation Offloading support enabled");
  38             userspace_tso = true;
  39             ovsthread_once_done(&once);
  40         }
  41     }
  42 }
  43
  44 bool
  45 userspace_tso_enabled(void)
  46 {
  47     return userspace_tso;
  48 }