Create worker threads using ODP API (direct in/out mode)

This patch allows VPP to run multiple worker threads compatible with ODP.
By default a single thread is assigned to each interface but this
can be changed using "set interface rx-placement" command.
Only Direct input/output mode without RSS is supported.

Change-Id: Ia6af7e5af4950159eb28b7d56bc9c8d34b80f8d4
Signed-off-by: Michal Mazur <mkm@semihalf.com>

1 files changed, 76 insertions, 0 deletions

diff --git a/src/plugins/odp/thread.c b/src/plugins/odp/thread.c
new file mode 100644
index 00000000..3a5482b5
--- /dev/null
+++ b/src/plugins/odp/thread.c
@@ -0,0 +1,76 @@
+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <vlib/vlib.h>
+#include <vnet/vnet.h>
+#include <odp_api.h>
+#include <odp/helper/odph_api.h>
+#include <odp/odp_packet.h>
+
+static clib_error_t *
+odp_launch_thread (void *fp, vlib_worker_thread_t * w, unsigned lcore_id)
+{
+  odp_packet_main_t *om = odp_packet_main;
+  odp_cpumask_t thd_mask;
+  odph_odpthread_params_t thr_params;
+
+  if (om->thread_cnt == MAX_WORKERS)
+    return clib_error_return (0, "Failed to launch thread %u", lcore_id);
+
+  memset (&thr_params, 0, sizeof (thr_params));
+  thr_params.start = fp;
+  thr_params.arg = w;
+  thr_params.thr_type = ODP_THREAD_WORKER;
+  thr_params.instance = om->instance;
+  odp_cpumask_zero (&thd_mask);
+  odp_cpumask_set (&thd_mask, lcore_id);
+
+  odph_odpthreads_create (&om->thread_tbl[om->thread_cnt], &thd_mask,
+			  &thr_params);
+
+  om->thread_cnt++;
+
+  return 0;
+}
+
+static clib_error_t *
+odp_thread_set_lcore (u32 thread, u16 lcore)
+{
+
+  return 0;
+}
+
+static vlib_thread_callbacks_t odp_callbacks = {
+  .vlib_launch_thread_cb = &odp_launch_thread,
+  .vlib_thread_set_lcore_cb = &odp_thread_set_lcore,
+};
+
+static clib_error_t *
+odp_thread_init (vlib_main_t * vm)
+{
+  vlib_thread_cb_register (vm, &odp_callbacks);
+  return 0;
+}
+
+VLIB_INIT_FUNCTION (odp_thread_init);
+
+/** @endcond */
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */