af_xdp: AF_XDP input plugin

Type: feature

Change-Id: I85aa4ad6b68c1aa0e51938002dc691a4b11c545c
Signed-off-by: Damjan Marion <damarion@cisco.com>
Signed-off-by: Benoît Ganne <bganne@cisco.com>

1 files changed, 125 insertions, 0 deletions

diff --git a/src/plugins/af_xdp/api.c b/src/plugins/af_xdp/api.c
new file mode 100644
index 00000000000..7592aa4ffda
--- /dev/null
+++ b/src/plugins/af_xdp/api.c
@@ -0,0 +1,125 @@
+/*
+ *------------------------------------------------------------------
+ * Copyright (c) 2020 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 <af_xdp/af_xdp.h>
+
+#include <vlibapi/api.h>
+#include <vlibmemory/api.h>
+
+/* define message IDs */
+#include <af_xdp/af_xdp.api_enum.h>
+#include <af_xdp/af_xdp.api_types.h>
+
+#include <vlibapi/api_helper_macros.h>
+
+static af_xdp_mode_t
+af_xdp_api_mode (vl_api_af_xdp_mode_t mode)
+{
+  switch (mode)
+    {
+    case AF_XDP_API_MODE_AUTO:
+      return AF_XDP_MODE_AUTO;
+    case AF_XDP_API_MODE_COPY:
+      return AF_XDP_MODE_COPY;
+    case AF_XDP_API_MODE_ZERO_COPY:
+      return AF_XDP_MODE_ZERO_COPY;
+    }
+  return AF_XDP_MODE_AUTO;
+}
+
+static void
+vl_api_af_xdp_create_t_handler (vl_api_af_xdp_create_t * mp)
+{
+  vlib_main_t *vm = vlib_get_main ();
+  af_xdp_main_t *rm = &af_xdp_main;
+  vl_api_af_xdp_create_reply_t *rmp;
+  af_xdp_create_if_args_t args;
+  int rv;
+
+  clib_memset (&args, 0, sizeof (af_xdp_create_if_args_t));
+
+  args.linux_ifname = mp->host_if[0] ? (char *) mp->host_if : 0;
+  args.name = mp->name[0] ? (char *) mp->name : 0;
+  args.prog = mp->prog[0] ? (char *) mp->prog : 0;
+  args.mode = af_xdp_api_mode (mp->mode);
+  args.rxq_size = ntohs (mp->rxq_size);
+  args.txq_size = ntohs (mp->txq_size);
+  args.rxq_num = ntohs (mp->rxq_num);
+
+  af_xdp_create_if (vm, &args);
+  rv = args.rv;
+
+  /* *INDENT-OFF* */
+  REPLY_MACRO2 (VL_API_AF_XDP_CREATE_REPLY + rm->msg_id_base,
+    ({
+      rmp->sw_if_index = ntohl (args.sw_if_index);
+    }));
+  /* *INDENT-ON* */
+}
+
+static void
+vl_api_af_xdp_delete_t_handler (vl_api_af_xdp_delete_t * mp)
+{
+  vlib_main_t *vm = vlib_get_main ();
+  vnet_main_t *vnm = vnet_get_main ();
+  af_xdp_main_t *rm = &af_xdp_main;
+  vl_api_af_xdp_delete_reply_t *rmp;
+  af_xdp_device_t *rd;
+  vnet_hw_interface_t *hw;
+  int rv = 0;
+
+  hw =
+    vnet_get_sup_hw_interface_api_visible_or_null (vnm,
+						   htonl (mp->sw_if_index));
+  if (hw == NULL || af_xdp_device_class.index != hw->dev_class_index)
+    {
+      rv = VNET_API_ERROR_INVALID_INTERFACE;
+      goto reply;
+    }
+
+  rd = pool_elt_at_index (rm->devices, hw->dev_instance);
+
+  af_xdp_delete_if (vm, rd);
+
+reply:
+  REPLY_MACRO (VL_API_AF_XDP_DELETE_REPLY + rm->msg_id_base);
+}
+
+/* set tup the API message handling tables */
+#include <af_xdp/af_xdp.api.c>
+static clib_error_t *
+af_xdp_plugin_api_hookup (vlib_main_t * vm)
+{
+  af_xdp_main_t *rm = &af_xdp_main;
+
+  /* ask for a correctly-sized block of API message decode slots */
+  rm->msg_id_base = setup_message_id_table ();
+  return 0;
+}
+
+VLIB_API_INIT_FUNCTION (af_xdp_plugin_api_hookup);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */