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 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] =
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,
65 VNET_FEATURE_ARC_INIT (device_input, static) =
67 .arc_name = "device-input",
68 .start_nodes = VNET_FEATURES ("device-input"),
69 .arc_index_ptr = &feature_main.device_input_feature_arc_index,
72 VNET_FEATURE_INIT (l2_patch, static) = {
73 .arc_name = "device-input",
74 .node_name = "l2-patch",
75 .runs_before = VNET_FEATURES ("ethernet-input"),
78 VNET_FEATURE_INIT (worker_handoff, static) = {
79 .arc_name = "device-input",
80 .node_name = "worker-handoff",
81 .runs_before = VNET_FEATURES ("ethernet-input"),
84 VNET_FEATURE_INIT (span_input, static) = {
85 .arc_name = "device-input",
86 .node_name = "span-input",
87 .runs_before = VNET_FEATURES ("ethernet-input"),
90 VNET_FEATURE_INIT (p2p_ethernet_node, static) = {
91 .arc_name = "device-input",
92 .node_name = "p2p-ethernet-input",
93 .runs_before = VNET_FEATURES ("ethernet-input"),
96 VNET_FEATURE_INIT (ethernet_input, static) = {
97 .arc_name = "device-input",
98 .node_name = "ethernet-input",
99 .runs_before = 0, /* not before any other features */
104 vnet_device_queue_sort (void *a1, void *a2)
106 vnet_device_and_queue_t *dq1 = a1;
107 vnet_device_and_queue_t *dq2 = a2;
109 if (dq1->dev_instance > dq2->dev_instance)
111 else if (dq1->dev_instance < dq2->dev_instance)
113 else if (dq1->queue_id > dq2->queue_id)
115 else if (dq1->queue_id < dq2->queue_id)
122 vnet_device_queue_update (vnet_main_t * vnm, vnet_device_input_runtime_t * rt)
124 vnet_device_and_queue_t *dq;
125 vnet_hw_interface_t *hw;
127 vec_sort_with_function (rt->devices_and_queues, vnet_device_queue_sort);
129 vec_foreach (dq, rt->devices_and_queues)
131 hw = vnet_get_hw_interface (vnm, dq->hw_if_index);
132 vec_validate (hw->dq_runtime_index_by_queue, dq->queue_id);
133 hw->dq_runtime_index_by_queue[dq->queue_id] = dq - rt->devices_and_queues;
138 vnet_hw_interface_assign_rx_thread (vnet_main_t * vnm, u32 hw_if_index,
139 u16 queue_id, uword thread_index)
141 vnet_device_main_t *vdm = &vnet_device_main;
142 vlib_main_t *vm, *vm0;
143 vnet_device_input_runtime_t *rt;
144 vnet_device_and_queue_t *dq;
145 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
147 ASSERT (hw->input_node_index > 0);
149 if (vdm->first_worker_thread_index == 0)
152 if (thread_index != 0 &&
153 (thread_index < vdm->first_worker_thread_index ||
154 thread_index > vdm->last_worker_thread_index))
156 thread_index = vdm->next_worker_thread_index++;
157 if (vdm->next_worker_thread_index > vdm->last_worker_thread_index)
158 vdm->next_worker_thread_index = vdm->first_worker_thread_index;
161 vm = vlib_mains[thread_index];
162 vm0 = vlib_get_main ();
164 vlib_worker_thread_barrier_sync (vm0);
166 rt = vlib_node_get_runtime_data (vm, hw->input_node_index);
168 vec_add2 (rt->devices_and_queues, dq, 1);
169 dq->hw_if_index = hw_if_index;
170 dq->dev_instance = hw->dev_instance;
171 dq->queue_id = queue_id;
172 dq->mode = VNET_HW_INTERFACE_RX_MODE_POLLING;
173 rt->enabled_node_state = VLIB_NODE_STATE_POLLING;
175 vnet_device_queue_update (vnm, rt);
176 vec_validate (hw->input_node_thread_index_by_queue, queue_id);
177 vec_validate (hw->rx_mode_by_queue, queue_id);
178 hw->input_node_thread_index_by_queue[queue_id] = thread_index;
179 hw->rx_mode_by_queue[queue_id] = VNET_HW_INTERFACE_RX_MODE_POLLING;
181 vlib_worker_thread_barrier_release (vm0);
183 vlib_node_set_state (vm, hw->input_node_index, rt->enabled_node_state);
187 vnet_hw_interface_unassign_rx_thread (vnet_main_t * vnm, u32 hw_if_index,
190 vlib_main_t *vm, *vm0;
191 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
192 vnet_device_input_runtime_t *rt;
193 vnet_device_and_queue_t *dq;
194 uword old_thread_index;
195 vnet_hw_interface_rx_mode mode;
197 if (hw->input_node_thread_index_by_queue == 0)
198 return VNET_API_ERROR_INVALID_INTERFACE;
200 if (vec_len (hw->input_node_thread_index_by_queue) < queue_id + 1)
201 return VNET_API_ERROR_INVALID_INTERFACE;
203 old_thread_index = hw->input_node_thread_index_by_queue[queue_id];
205 vm = vlib_mains[old_thread_index];
207 rt = vlib_node_get_runtime_data (vm, hw->input_node_index);
209 vec_foreach (dq, rt->devices_and_queues)
210 if (dq->hw_if_index == hw_if_index && dq->queue_id == queue_id)
216 return VNET_API_ERROR_INVALID_INTERFACE;
220 vm0 = vlib_get_main ();
221 vlib_worker_thread_barrier_sync (vm0);
222 vec_del1 (rt->devices_and_queues, dq - rt->devices_and_queues);
223 vnet_device_queue_update (vnm, rt);
224 hw->rx_mode_by_queue[queue_id] = VNET_HW_INTERFACE_RX_MODE_UNKNOWN;
225 vlib_worker_thread_barrier_release (vm0);
227 if (vec_len (rt->devices_and_queues) == 0)
228 vlib_node_set_state (vm, hw->input_node_index, VLIB_NODE_STATE_DISABLED);
229 else if (mode == VNET_HW_INTERFACE_RX_MODE_POLLING)
232 * if the deleted interface is polling, we may need to set the node state
233 * to interrupt if there is no more polling interface for this device's
234 * corresponding thread. This is because mixed interfaces
235 * (polling and interrupt), assigned to the same thread, set the
236 * thread to polling prior to the deletion.
238 vec_foreach (dq, rt->devices_and_queues)
240 if (dq->mode == VNET_HW_INTERFACE_RX_MODE_POLLING)
243 rt->enabled_node_state = VLIB_NODE_STATE_INTERRUPT;
244 vlib_node_set_state (vm, hw->input_node_index, rt->enabled_node_state);
252 vnet_hw_interface_set_rx_mode (vnet_main_t * vnm, u32 hw_if_index,
253 u16 queue_id, vnet_hw_interface_rx_mode mode)
257 vnet_device_and_queue_t *dq;
258 vlib_node_state_t enabled_node_state;
259 ASSERT (mode < VNET_HW_INTERFACE_NUM_RX_MODES);
260 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
261 vnet_device_input_runtime_t *rt;
264 if (mode == VNET_HW_INTERFACE_RX_MODE_DEFAULT)
265 mode = hw->default_rx_mode;
267 if (hw->input_node_thread_index_by_queue == 0 || hw->rx_mode_by_queue == 0)
268 return VNET_API_ERROR_INVALID_INTERFACE;
270 if (hw->rx_mode_by_queue[queue_id] == mode)
273 if (mode != VNET_HW_INTERFACE_RX_MODE_POLLING &&
274 (hw->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_INT_MODE) == 0)
275 return VNET_API_ERROR_UNSUPPORTED;
277 if ((vec_len (hw->input_node_thread_index_by_queue) < queue_id + 1) ||
278 (vec_len (hw->rx_mode_by_queue) < queue_id + 1))
279 return VNET_API_ERROR_INVALID_QUEUE;
281 hw->rx_mode_by_queue[queue_id] = mode;
282 thread_index = hw->input_node_thread_index_by_queue[queue_id];
283 vm = vlib_mains[thread_index];
285 rt = vlib_node_get_runtime_data (vm, hw->input_node_index);
287 vec_foreach (dq, rt->devices_and_queues)
289 if (dq->hw_if_index == hw_if_index && dq->queue_id == queue_id)
291 if (dq->mode == VNET_HW_INTERFACE_RX_MODE_POLLING)
296 enabled_node_state = VLIB_NODE_STATE_POLLING;
298 enabled_node_state = VLIB_NODE_STATE_INTERRUPT;
300 if (rt->enabled_node_state != enabled_node_state)
302 rt->enabled_node_state = enabled_node_state;
303 if (vlib_node_get_state (vm, hw->input_node_index) !=
304 VLIB_NODE_STATE_DISABLED)
305 vlib_node_set_state (vm, hw->input_node_index, enabled_node_state);
312 vnet_hw_interface_get_rx_mode (vnet_main_t * vnm, u32 hw_if_index,
313 u16 queue_id, vnet_hw_interface_rx_mode * mode)
317 vnet_device_and_queue_t *dq;
318 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
319 vnet_device_input_runtime_t *rt;
321 if (hw->input_node_thread_index_by_queue == 0)
322 return VNET_API_ERROR_INVALID_INTERFACE;
324 if ((vec_len (hw->input_node_thread_index_by_queue) < queue_id + 1) ||
325 (vec_len (hw->rx_mode_by_queue) < queue_id + 1))
326 return VNET_API_ERROR_INVALID_QUEUE;
328 thread_index = hw->input_node_thread_index_by_queue[queue_id];
329 vm = vlib_mains[thread_index];
331 rt = vlib_node_get_runtime_data (vm, hw->input_node_index);
333 vec_foreach (dq, rt->devices_and_queues)
334 if (dq->hw_if_index == hw_if_index && dq->queue_id == queue_id)
340 return VNET_API_ERROR_INVALID_INTERFACE;
345 static clib_error_t *
346 vnet_device_init (vlib_main_t * vm)
348 vnet_device_main_t *vdm = &vnet_device_main;
349 vlib_thread_main_t *tm = vlib_get_thread_main ();
350 vlib_thread_registration_t *tr;
353 vec_validate_aligned (vdm->workers, tm->n_vlib_mains - 1,
354 CLIB_CACHE_LINE_BYTES);
356 p = hash_get_mem (tm->thread_registrations_by_name, "workers");
357 tr = p ? (vlib_thread_registration_t *) p[0] : 0;
358 if (tr && tr->count > 0)
360 vdm->first_worker_thread_index = tr->first_index;
361 vdm->next_worker_thread_index = tr->first_index;
362 vdm->last_worker_thread_index = tr->first_index + tr->count - 1;
367 VLIB_INIT_FUNCTION (vnet_device_init);
370 * fd.io coding-style-patch-verification: ON
373 * eval: (c-set-style "gnu")