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:
7 * http://www.apache.org/licenses/LICENSE-2.0
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.
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>
22 vnet_device_main_t vnet_device_main;
25 device_input_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
32 VLIB_REGISTER_NODE (device_input_node) = {
33 .function = device_input_fn,
34 .name = "device-input",
35 .runtime_data_bytes = sizeof (vnet_device_input_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,
42 /* Table defines how much we need to advance current data pointer
43 in the buffer if we shortcut to l3 nodes */
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] =
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),
55 VNET_FEATURE_ARC_INIT (device_input, static) =
57 .arc_name = "device-input",
58 .start_nodes = VNET_FEATURES ("device-input"),
59 .arc_index_ptr = &feature_main.device_input_feature_arc_index,
62 VNET_FEATURE_INIT (l2_patch, static) = {
63 .arc_name = "device-input",
64 .node_name = "l2-patch",
65 .runs_before = VNET_FEATURES ("ethernet-input"),
68 VNET_FEATURE_INIT (worker_handoff, static) = {
69 .arc_name = "device-input",
70 .node_name = "worker-handoff",
71 .runs_before = VNET_FEATURES ("ethernet-input"),
74 VNET_FEATURE_INIT (span_input, static) = {
75 .arc_name = "device-input",
76 .node_name = "span-input",
77 .runs_before = VNET_FEATURES ("ethernet-input"),
80 VNET_FEATURE_INIT (ethernet_input, static) = {
81 .arc_name = "device-input",
82 .node_name = "ethernet-input",
83 .runs_before = 0, /* not before any other features */
88 vnet_device_queue_sort (void *a1, void *a2)
90 vnet_device_and_queue_t *dq1 = a1;
91 vnet_device_and_queue_t *dq2 = a2;
93 if (dq1->dev_instance > dq2->dev_instance)
95 else if (dq1->dev_instance < dq2->dev_instance)
97 else if (dq1->queue_id > dq2->queue_id)
99 else if (dq1->queue_id < dq2->queue_id)
106 vnet_device_queue_update (vnet_main_t * vnm, vnet_device_input_runtime_t * rt)
108 vnet_device_and_queue_t *dq;
109 vnet_hw_interface_t *hw;
111 vec_sort_with_function (rt->devices_and_queues, vnet_device_queue_sort);
113 vec_foreach (dq, rt->devices_and_queues)
115 hw = vnet_get_hw_interface (vnm, dq->hw_if_index);
116 vec_validate (hw->dq_runtime_index_by_queue, dq->queue_id);
117 hw->dq_runtime_index_by_queue[dq->queue_id] = dq - rt->devices_and_queues;
122 vnet_hw_interface_assign_rx_thread (vnet_main_t * vnm, u32 hw_if_index,
123 u16 queue_id, uword thread_index)
125 vnet_device_main_t *vdm = &vnet_device_main;
127 vnet_device_input_runtime_t *rt;
128 vnet_device_and_queue_t *dq;
129 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
131 ASSERT (hw->input_node_index > 0);
133 if (vdm->first_worker_thread_index == 0)
136 if (thread_index != 0 &&
137 (thread_index < vdm->first_worker_thread_index ||
138 thread_index > vdm->last_worker_thread_index))
140 thread_index = vdm->next_worker_thread_index++;
141 if (vdm->next_worker_thread_index > vdm->last_worker_thread_index)
142 vdm->next_worker_thread_index = vdm->first_worker_thread_index;
145 vm = vlib_mains[thread_index];
146 rt = vlib_node_get_runtime_data (vm, hw->input_node_index);
148 vec_add2 (rt->devices_and_queues, dq, 1);
149 dq->hw_if_index = hw_if_index;
150 dq->dev_instance = hw->dev_instance;
151 dq->queue_id = queue_id;
152 dq->mode = VNET_HW_INTERFACE_RX_MODE_POLLING;
153 rt->enabled_node_state = VLIB_NODE_STATE_POLLING;
155 vnet_device_queue_update (vnm, rt);
156 vec_validate (hw->input_node_thread_index_by_queue, queue_id);
157 vec_validate (hw->rx_mode_by_queue, queue_id);
158 hw->input_node_thread_index_by_queue[queue_id] = thread_index;
159 hw->rx_mode_by_queue[queue_id] = VNET_HW_INTERFACE_RX_MODE_POLLING;
160 vlib_node_set_state (vm, hw->input_node_index, rt->enabled_node_state);
164 vnet_hw_interface_unassign_rx_thread (vnet_main_t * vnm, u32 hw_if_index,
168 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
169 vnet_device_input_runtime_t *rt;
170 vnet_device_and_queue_t *dq;
171 uword old_thread_index;
172 vnet_hw_interface_rx_mode mode;
174 if (hw->input_node_thread_index_by_queue == 0)
175 return VNET_API_ERROR_INVALID_INTERFACE;
177 if (vec_len (hw->input_node_thread_index_by_queue) < queue_id + 1)
178 return VNET_API_ERROR_INVALID_INTERFACE;
180 old_thread_index = hw->input_node_thread_index_by_queue[queue_id];
182 vm = vlib_mains[old_thread_index];
184 rt = vlib_node_get_runtime_data (vm, hw->input_node_index);
186 vec_foreach (dq, rt->devices_and_queues)
187 if (dq->hw_if_index == hw_if_index && dq->queue_id == queue_id)
190 vec_del1 (rt->devices_and_queues, dq - rt->devices_and_queues);
194 return VNET_API_ERROR_INVALID_INTERFACE;
198 vnet_device_queue_update (vnm, rt);
199 hw->rx_mode_by_queue[queue_id] = VNET_HW_INTERFACE_RX_MODE_UNKNOWN;
201 if (vec_len (rt->devices_and_queues) == 0)
202 vlib_node_set_state (vm, hw->input_node_index, VLIB_NODE_STATE_DISABLED);
203 else if (mode == VNET_HW_INTERFACE_RX_MODE_POLLING)
206 * if the deleted interface is polling, we may need to set the node state
207 * to interrupt if there is no more polling interface for this device's
208 * corresponding thread. This is because mixed interfaces
209 * (polling and interrupt), assigned to the same thread, set the
210 * thread to polling prior to the deletion.
212 vec_foreach (dq, rt->devices_and_queues)
214 if (dq->mode == VNET_HW_INTERFACE_RX_MODE_POLLING)
217 rt->enabled_node_state = VLIB_NODE_STATE_INTERRUPT;
218 vlib_node_set_state (vm, hw->input_node_index, rt->enabled_node_state);
226 vnet_hw_interface_set_rx_mode (vnet_main_t * vnm, u32 hw_if_index,
227 u16 queue_id, vnet_hw_interface_rx_mode mode)
231 vnet_device_and_queue_t *dq;
232 vlib_node_state_t enabled_node_state;
233 ASSERT (mode < VNET_HW_INTERFACE_NUM_RX_MODES);
234 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
235 vnet_device_input_runtime_t *rt;
238 if (hw->input_node_thread_index_by_queue == 0 || hw->rx_mode_by_queue == 0)
239 return VNET_API_ERROR_INVALID_INTERFACE;
241 if (hw->rx_mode_by_queue[queue_id] == mode)
244 if (mode != VNET_HW_INTERFACE_RX_MODE_POLLING &&
245 (hw->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_INT_MODE) == 0)
246 return VNET_API_ERROR_UNSUPPORTED;
248 hw->rx_mode_by_queue[queue_id] = mode;
249 thread_index = hw->input_node_thread_index_by_queue[queue_id];
250 vm = vlib_mains[thread_index];
252 rt = vlib_node_get_runtime_data (vm, hw->input_node_index);
254 vec_foreach (dq, rt->devices_and_queues)
256 if (dq->hw_if_index == hw_if_index && dq->queue_id == queue_id)
258 if (dq->mode == VNET_HW_INTERFACE_RX_MODE_POLLING)
263 enabled_node_state = VLIB_NODE_STATE_POLLING;
265 enabled_node_state = VLIB_NODE_STATE_INTERRUPT;
267 if (rt->enabled_node_state != enabled_node_state)
269 rt->enabled_node_state = enabled_node_state;
270 if (vlib_node_get_state (vm, hw->input_node_index) !=
271 VLIB_NODE_STATE_DISABLED)
272 vlib_node_set_state (vm, hw->input_node_index, enabled_node_state);
279 vnet_hw_interface_get_rx_mode (vnet_main_t * vnm, u32 hw_if_index,
280 u16 queue_id, vnet_hw_interface_rx_mode * mode)
284 vnet_device_and_queue_t *dq;
285 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
286 vnet_device_input_runtime_t *rt;
288 if (hw->input_node_thread_index_by_queue == 0)
289 return VNET_API_ERROR_INVALID_INTERFACE;
291 thread_index = hw->input_node_thread_index_by_queue[queue_id];
292 vm = vlib_mains[thread_index];
294 rt = vlib_node_get_runtime_data (vm, hw->input_node_index);
296 vec_foreach (dq, rt->devices_and_queues)
297 if (dq->hw_if_index == hw_if_index && dq->queue_id == queue_id)
303 return VNET_API_ERROR_INVALID_INTERFACE;
308 static clib_error_t *
309 vnet_device_init (vlib_main_t * vm)
311 vnet_device_main_t *vdm = &vnet_device_main;
312 vlib_thread_main_t *tm = vlib_get_thread_main ();
313 vlib_thread_registration_t *tr;
316 vec_validate_aligned (vdm->workers, tm->n_vlib_mains - 1,
317 CLIB_CACHE_LINE_BYTES);
319 p = hash_get_mem (tm->thread_registrations_by_name, "workers");
320 tr = p ? (vlib_thread_registration_t *) p[0] : 0;
321 if (tr && tr->count > 0)
323 vdm->first_worker_thread_index = tr->first_index;
324 vdm->next_worker_thread_index = tr->first_index;
325 vdm->last_worker_thread_index = tr->first_index + tr->count - 1;
330 VLIB_INIT_FUNCTION (vnet_device_init);
333 * fd.io coding-style-patch-verification: ON
336 * eval: (c-set-style "gnu")