src/vnet/devices/devices.c

   1 /*
   2  * Copyright (c) 2015 Cisco and/or its affiliates.
   3  * Licensed under the Apache License, Version 2.0 (the "License");
   4  * you may not use this file except in compliance with the License.
   5  * You may obtain a copy of the License at:
   6  *
   7  *     http://www.apache.org/licenses/LICENSE-2.0
   8  *
   9  * Unless required by applicable law or agreed to in writing, software
  10  * distributed under the License is distributed on an "AS IS" BASIS,
  11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12  * See the License for the specific language governing permissions and
  13  * limitations under the License.
  14  */
  15
  16 #include <vnet/vnet.h>
  17 #include <vnet/devices/devices.h>
  18 #include <vnet/feature/feature.h>
  19 #include <vnet/ip/ip.h>
  20 #include <vnet/ethernet/ethernet.h>
  21
  22 vnet_device_main_t vnet_device_main;
  23
  24 static uword
  25 device_input_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
  26                  vlib_frame_t * frame)
  27 {
  28   return 0;
  29 }
  30
  31 /* *INDENT-OFF* */
  32 VLIB_REGISTER_NODE (device_input_node) = {
  33   .function = device_input_fn,
  34   .name = "device-input",
  35   .runtime_data_bytes = sizeof (vnet_hw_if_rx_node_runtime_t),
  36   .type = VLIB_NODE_TYPE_INPUT,
  37   .state = VLIB_NODE_STATE_DISABLED,
  38   .n_next_nodes = VNET_DEVICE_INPUT_N_NEXT_NODES,
  39   .next_nodes = VNET_DEVICE_INPUT_NEXT_NODES,
  40 };
  41
  42 /* Table defines how much we need to advance current data pointer
  43    in the buffer if we shortcut to l3 nodes */
  44
  45 const u32 __attribute__((aligned (CLIB_CACHE_LINE_BYTES)))
  46 device_input_next_node_advance[((VNET_DEVICE_INPUT_N_NEXT_NODES /
  47                                 CLIB_CACHE_LINE_BYTES) +1) * CLIB_CACHE_LINE_BYTES] =
  48 {
  49       [VNET_DEVICE_INPUT_NEXT_IP4_INPUT] = sizeof (ethernet_header_t),
  50       [VNET_DEVICE_INPUT_NEXT_IP4_NCS_INPUT] = sizeof (ethernet_header_t),
  51       [VNET_DEVICE_INPUT_NEXT_IP6_INPUT] = sizeof (ethernet_header_t),
  52       [VNET_DEVICE_INPUT_NEXT_MPLS_INPUT] = sizeof (ethernet_header_t),
  53 };
  54
  55 const u32 __attribute__((aligned (CLIB_CACHE_LINE_BYTES)))
  56 device_input_next_node_flags[((VNET_DEVICE_INPUT_N_NEXT_NODES /
  57                                 CLIB_CACHE_LINE_BYTES) +1) * CLIB_CACHE_LINE_BYTES] =
  58 {
  59       [VNET_DEVICE_INPUT_NEXT_IP4_INPUT] = VNET_BUFFER_F_L3_HDR_OFFSET_VALID,
  60       [VNET_DEVICE_INPUT_NEXT_IP4_NCS_INPUT] = VNET_BUFFER_F_L3_HDR_OFFSET_VALID,
  61       [VNET_DEVICE_INPUT_NEXT_IP6_INPUT] = VNET_BUFFER_F_L3_HDR_OFFSET_VALID,
  62       [VNET_DEVICE_INPUT_NEXT_MPLS_INPUT] = VNET_BUFFER_F_L3_HDR_OFFSET_VALID,
  63 };
  64
  65 VNET_FEATURE_ARC_INIT (device_input, static) =
  66 {
  67   .arc_name  = "device-input",
  68   .start_nodes = VNET_FEATURES ("device-input"),
  69   .last_in_arc = "ethernet-input",
  70   .arc_index_ptr = &feature_main.device_input_feature_arc_index,
  71 };
  72
  73 VNET_FEATURE_INIT (l2_patch, static) = {
  74   .arc_name = "device-input",
  75   .node_name = "l2-patch",
  76   .runs_before = VNET_FEATURES ("ethernet-input"),
  77 };
  78
  79 VNET_FEATURE_INIT (worker_handoff, static) = {
  80   .arc_name = "device-input",
  81   .node_name = "worker-handoff",
  82   .runs_before = VNET_FEATURES ("ethernet-input"),
  83 };
  84
  85 VNET_FEATURE_INIT (span_input, static) = {
  86   .arc_name = "device-input",
  87   .node_name = "span-input",
  88   .runs_before = VNET_FEATURES ("ethernet-input"),
  89 };
  90
  91 VNET_FEATURE_INIT (p2p_ethernet_node, static) = {
  92   .arc_name = "device-input",
  93   .node_name = "p2p-ethernet-input",
  94   .runs_before = VNET_FEATURES ("ethernet-input"),
  95 };
  96
  97 VNET_FEATURE_INIT (ethernet_input, static) = {
  98   .arc_name = "device-input",
  99   .node_name = "ethernet-input",
 100   .runs_before = 0, /* not before any other features */
 101 };
 102 /* *INDENT-ON* */
 103
 104 static clib_error_t *
 105 vnet_device_init (vlib_main_t * vm)
 106 {
 107   vnet_device_main_t *vdm = &vnet_device_main;
 108   vlib_thread_main_t *tm = vlib_get_thread_main ();
 109   vlib_thread_registration_t *tr;
 110   uword *p;
 111
 112   vec_validate_aligned (vdm->workers, tm->n_vlib_mains - 1,
 113                         CLIB_CACHE_LINE_BYTES);
 114
 115   p = hash_get_mem (tm->thread_registrations_by_name, "workers");
 116   tr = p ? (vlib_thread_registration_t *) p[0] : 0;
 117   if (tr && tr->count > 0)
 118     {
 119       vdm->first_worker_thread_index = tr->first_index;
 120       vdm->next_worker_thread_index = tr->first_index;
 121       vdm->last_worker_thread_index = tr->first_index + tr->count - 1;
 122     }
 123   return 0;
 124 }
 125
 126 VLIB_INIT_FUNCTION (vnet_device_init);
 127
 128 /*
 129  * fd.io coding-style-patch-verification: ON
 130  *
 131  * Local Variables:
 132  * eval: (c-set-style "gnu")
 133  * End:
 134  */