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_input_assign_thread (u32 hw_if_index,
107 u16 queue_id, uword thread_index)
109 vnet_main_t *vnm = vnet_get_main ();
110 vnet_device_main_t *vdm = &vnet_device_main;
112 vnet_device_input_runtime_t *rt;
113 vnet_device_and_queue_t *dq;
114 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
116 ASSERT (hw->input_node_index > 0);
118 if (vdm->first_worker_thread_index == 0)
121 if (thread_index != 0 &&
122 (thread_index < vdm->first_worker_thread_index ||
123 thread_index > vdm->last_worker_thread_index))
125 thread_index = vdm->next_worker_thread_index++;
126 if (vdm->next_worker_thread_index > vdm->last_worker_thread_index)
127 vdm->next_worker_thread_index = vdm->first_worker_thread_index;
130 vm = vlib_mains[thread_index];
131 rt = vlib_node_get_runtime_data (vm, hw->input_node_index);
133 vec_add2 (rt->devices_and_queues, dq, 1);
134 dq->hw_if_index = hw_if_index;
135 dq->dev_instance = hw->dev_instance;
136 dq->queue_id = queue_id;
138 vec_sort_with_function (rt->devices_and_queues, vnet_device_queue_sort);
139 vec_validate (hw->input_node_thread_index_by_queue, queue_id);
140 hw->input_node_thread_index_by_queue[queue_id] = thread_index;
144 vnet_device_input_unassign_thread (u32 hw_if_index, u16 queue_id,
147 vnet_main_t *vnm = vnet_get_main ();
148 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
149 vnet_device_input_runtime_t *rt;
150 vnet_device_and_queue_t *dq;
151 uword old_thread_index;
153 if (hw->input_node_thread_index_by_queue == 0)
154 return VNET_API_ERROR_INVALID_INTERFACE;
156 if (vec_len (hw->input_node_thread_index_by_queue) < queue_id + 1)
157 return VNET_API_ERROR_INVALID_INTERFACE;
159 old_thread_index = hw->input_node_thread_index_by_queue[queue_id];
161 if (old_thread_index == thread_index)
165 vlib_node_get_runtime_data (vlib_mains[old_thread_index],
166 hw->input_node_index);
168 vec_foreach (dq, rt->devices_and_queues)
169 if (dq->hw_if_index == hw_if_index && dq->queue_id == queue_id)
171 vec_del1 (rt->devices_and_queues, dq - rt->devices_and_queues);
175 return VNET_API_ERROR_INVALID_INTERFACE;
178 vec_sort_with_function (rt->devices_and_queues, vnet_device_queue_sort);
183 static clib_error_t *
184 show_device_placement_fn (vlib_main_t * vm, unformat_input_t * input,
185 vlib_cli_command_t * cmd)
188 vnet_main_t *vnm = vnet_get_main ();
189 vnet_device_input_runtime_t *rt;
190 vnet_device_and_queue_t *dq;
191 vlib_node_t *pn = vlib_get_node_by_name (vm, (u8 *) "device-input");
196 foreach_vlib_main (({
197 clib_bitmap_foreach (si, pn->sibling_bitmap,
199 rt = vlib_node_get_runtime_data (this_vlib_main, si);
201 if (vec_len (rt->devices_and_queues))
202 s = format (s, " node %U:\n", format_vlib_node_name, vm, si);
204 vec_foreach (dq, rt->devices_and_queues)
206 s = format (s, " %U queue %u\n",
207 format_vnet_sw_if_index_name, vnm, dq->hw_if_index,
213 vlib_cli_output(vm, "Thread %u (%v):\n%v", index,
214 vlib_worker_threads[index].name, s);
215 vec_reset_length (s);
226 VLIB_CLI_COMMAND (memif_delete_command, static) = {
227 .path = "show interface placement",
228 .short_help = "show interface placement",
229 .function = show_device_placement_fn,
233 static clib_error_t *
234 set_device_placement (vlib_main_t * vm, unformat_input_t * input,
235 vlib_cli_command_t * cmd)
237 clib_error_t *error = 0;
238 unformat_input_t _line_input, *line_input = &_line_input;
239 vnet_main_t *vnm = vnet_get_main ();
240 vnet_device_main_t *vdm = &vnet_device_main;
241 u32 hw_if_index = (u32) ~ 0;
242 u32 queue_id = (u32) 0;
243 u32 thread_index = (u32) ~ 0;
246 if (!unformat_user (input, unformat_line_input, line_input))
249 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
252 (line_input, "%U", unformat_vnet_hw_interface, vnm, &hw_if_index))
254 else if (unformat (line_input, "queue %d", &queue_id))
256 else if (unformat (line_input, "main", &thread_index))
258 else if (unformat (line_input, "worker %d", &thread_index))
259 thread_index += vdm->first_worker_thread_index;
262 error = clib_error_return (0, "parse error: '%U'",
263 format_unformat_error, line_input);
264 unformat_free (line_input);
269 unformat_free (line_input);
271 if (hw_if_index == (u32) ~ 0)
272 return clib_error_return (0, "please specify valid interface name");
274 if (thread_index > vdm->last_worker_thread_index)
275 return clib_error_return (0,
276 "please specify valid worker thread or main");
279 vnet_device_input_unassign_thread (hw_if_index, queue_id, thread_index);
282 return clib_error_return (0, "not found");
284 vnet_device_input_assign_thread (hw_if_index, queue_id, thread_index);
290 * This command is used to assign a given interface, and optionally a
291 * given queue, to a different thread. If the '<em>queue</em>' is not provided,
295 * Example of how to display the interface placement:
296 * @cliexstart{show interface placement}
297 * Thread 1 (vpp_wk_0):
298 * GigabitEthernet0/8/0 queue 0
299 * GigabitEthernet0/9/0 queue 0
300 * Thread 2 (vpp_wk_1):
301 * GigabitEthernet0/8/0 queue 1
302 * GigabitEthernet0/9/0 queue 1
304 * Example of how to assign a interface and queue to a thread:
305 * @cliexcmd{set interface placement GigabitEthernet0/8/0 queue 1 thread 1}
308 VLIB_CLI_COMMAND (cmd_set_dpdk_if_placement,static) = {
309 .path = "set interface placement",
310 .short_help = "set interface placement <interface> [queue <n>] [thread <n> | main]",
311 .function = set_device_placement,
315 static clib_error_t *
316 vnet_device_init (vlib_main_t * vm)
318 vnet_device_main_t *vdm = &vnet_device_main;
319 vlib_thread_main_t *tm = vlib_get_thread_main ();
320 vlib_thread_registration_t *tr;
323 vec_validate_aligned (vdm->workers, tm->n_vlib_mains - 1,
324 CLIB_CACHE_LINE_BYTES);
326 p = hash_get_mem (tm->thread_registrations_by_name, "workers");
327 tr = p ? (vlib_thread_registration_t *) p[0] : 0;
328 if (tr && tr->count > 0)
330 vdm->first_worker_thread_index = tr->first_index;
331 vdm->next_worker_thread_index = tr->first_index;
332 vdm->last_worker_thread_index = tr->first_index + tr->count - 1;
337 VLIB_INIT_FUNCTION (vnet_device_init);
340 * fd.io coding-style-patch-verification: ON
343 * eval: (c-set-style "gnu")