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.
15 #include <vnet/vnet.h>
16 #include <vppinfra/vec.h>
17 #include <vppinfra/format.h>
18 #include <vlib/unix/cj.h>
21 #include <vnet/ethernet/ethernet.h>
22 #include <vnet/devices/dpdk/dpdk.h>
24 #include "dpdk_priv.h"
25 #include <vppinfra/error.h>
27 #define foreach_dpdk_tx_func_error \
28 _(BAD_RETVAL, "DPDK tx function returned an error") \
29 _(RING_FULL, "Tx packet drops (ring full)") \
30 _(PKT_DROP, "Tx packet drops (dpdk tx failure)") \
31 _(REPL_FAIL, "Tx packet drops (replication failure)")
34 #define _(f,s) DPDK_TX_FUNC_ERROR_##f,
35 foreach_dpdk_tx_func_error
38 } dpdk_tx_func_error_t;
40 static char * dpdk_tx_func_error_strings[] = {
42 foreach_dpdk_tx_func_error
46 static struct rte_mbuf * dpdk_replicate_packet_mb (vlib_buffer_t * b)
48 vlib_main_t * vm = vlib_get_main();
49 vlib_buffer_main_t * bm = vm->buffer_main;
50 struct rte_mbuf * first_mb = 0, * new_mb, * pkt_mb, ** prev_mb_next = 0;
51 u8 nb_segs, nb_segs_left;
53 unsigned socket_id = rte_socket_id();
55 ASSERT (bm->pktmbuf_pools[socket_id]);
56 pkt_mb = ((struct rte_mbuf *)b)-1;
57 nb_segs = pkt_mb->nb_segs;
58 for (nb_segs_left = nb_segs; nb_segs_left; nb_segs_left--)
60 if (PREDICT_FALSE(pkt_mb == 0))
62 clib_warning ("Missing %d mbuf chain segment(s): "
63 "(nb_segs = %d, nb_segs_left = %d)!",
64 nb_segs - nb_segs_left, nb_segs, nb_segs_left);
66 rte_pktmbuf_free(first_mb);
69 new_mb = rte_pktmbuf_alloc (bm->pktmbuf_pools[socket_id]);
70 if (PREDICT_FALSE(new_mb == 0))
73 rte_pktmbuf_free(first_mb);
78 * Copy packet info into 1st segment.
83 rte_pktmbuf_pkt_len (first_mb) = pkt_mb->pkt_len;
84 first_mb->nb_segs = pkt_mb->nb_segs;
85 first_mb->port = pkt_mb->port;
86 #ifdef DAW_FIXME // TX Offload support TBD
87 first_mb->vlan_macip = pkt_mb->vlan_macip;
88 first_mb->hash = pkt_mb->hash;
89 first_mb->ol_flags = pkt_mb->ol_flags
94 ASSERT(prev_mb_next != 0);
95 *prev_mb_next = new_mb;
99 * Copy packet segment data into new mbuf segment.
101 rte_pktmbuf_data_len (new_mb) = pkt_mb->data_len;
102 copy_bytes = pkt_mb->data_len + RTE_PKTMBUF_HEADROOM;
103 ASSERT(copy_bytes <= pkt_mb->buf_len);
104 memcpy(new_mb->buf_addr, pkt_mb->buf_addr, copy_bytes);
106 prev_mb_next = &new_mb->next;
107 pkt_mb = pkt_mb->next;
111 __rte_mbuf_sanity_check(first_mb, 1);
121 /* Copy of VLIB buffer; packet data stored in pre_data. */
122 vlib_buffer_t buffer;
123 } dpdk_tx_dma_trace_t;
126 dpdk_tx_trace_buffer (dpdk_main_t * dm,
127 vlib_node_runtime_t * node,
131 vlib_buffer_t * buffer)
133 vlib_main_t * vm = vlib_get_main();
134 dpdk_tx_dma_trace_t * t0;
135 struct rte_mbuf * mb;
137 mb = ((struct rte_mbuf *)buffer)-1;
139 t0 = vlib_add_trace (vm, node, buffer, sizeof (t0[0]));
140 t0->queue_index = queue_id;
141 t0->device_index = xd->device_index;
142 t0->buffer_index = buffer_index;
143 memcpy (&t0->mb, mb, sizeof (t0->mb));
144 memcpy (&t0->buffer, buffer, sizeof (buffer[0]) - sizeof (buffer->pre_data));
145 memcpy (t0->buffer.pre_data, buffer->data + buffer->current_data,
146 sizeof (t0->buffer.pre_data));
150 * This function calls the dpdk's tx_burst function to transmit the packets
151 * on the tx_vector. It manages a lock per-device if the device does not
152 * support multiple queues. It returns the number of packets untransmitted
153 * on the tx_vector. If all packets are transmitted (the normal case), the
154 * function returns 0.
156 * The tx_burst function may not be able to transmit all packets because the
157 * dpdk ring is full. If a flowcontrol callback function has been configured
158 * then the function simply returns. If no callback has been configured, the
159 * function will retry calling tx_burst with the remaining packets. This will
160 * continue until all packets are transmitted or tx_burst indicates no packets
161 * could be transmitted. (The caller can drop the remaining packets.)
163 * The function assumes there is at least one packet on the tx_vector.
166 u32 tx_burst_vector_internal (vlib_main_t * vm,
168 struct rte_mbuf ** tx_vector)
170 dpdk_main_t * dm = &dpdk_main;
179 ring = vec_header(tx_vector, sizeof(*ring));
181 n_packets = ring->tx_head - ring->tx_tail;
183 tx_head = ring->tx_head % DPDK_TX_RING_SIZE;
186 * Ensure rte_eth_tx_burst is not called with 0 packets, which can lead to
187 * unpredictable results.
189 ASSERT(n_packets > 0);
192 * Check for tx_vector overflow. If this fails it is a system configuration
193 * error. The ring should be sized big enough to handle the largest un-flowed
194 * off burst from a traffic manager. A larger size also helps performance
195 * a bit because it decreases the probability of having to issue two tx_burst
196 * calls due to a ring wrap.
198 ASSERT(n_packets < DPDK_TX_RING_SIZE);
201 * If there is no flowcontrol callback, there is only temporary buffering
202 * on the tx_vector and so the tail should always be 0.
204 ASSERT(dm->flowcontrol_callback || ring->tx_tail == 0);
207 * If there is a flowcontrol callback, don't retry any incomplete tx_bursts.
208 * Apply backpressure instead. If there is no callback, keep retrying until
209 * a tx_burst sends no packets. n_retry of 255 essentially means no retry
212 n_retry = dm->flowcontrol_callback ? 0 : 255;
214 queue_id = vm->cpu_index;
217 /* start the burst at the tail */
218 tx_tail = ring->tx_tail % DPDK_TX_RING_SIZE;
221 * This device only supports one TX queue,
222 * and we're running multi-threaded...
224 if (PREDICT_FALSE(xd->lockp != 0))
226 queue_id = queue_id % xd->tx_q_used;
227 while (__sync_lock_test_and_set (xd->lockp[queue_id], 1))
229 queue_id = (queue_id + 1) % xd->tx_q_used;
232 if (PREDICT_TRUE(xd->dev_type == VNET_DPDK_DEV_ETH))
234 if (PREDICT_TRUE(tx_head > tx_tail))
236 /* no wrap, transmit in one burst */
237 rv = rte_eth_tx_burst(xd->device_index,
240 (uint16_t) (tx_head-tx_tail));
245 * This can only happen if there is a flowcontrol callback.
246 * We need to split the transmit into two calls: one for
247 * the packets up to the wrap point, and one to continue
248 * at the start of the ring.
249 * Transmit pkts up to the wrap point.
251 rv = rte_eth_tx_burst(xd->device_index,
254 (uint16_t) (DPDK_TX_RING_SIZE - tx_tail));
257 * If we transmitted everything we wanted, then allow 1 retry
258 * so we can try to transmit the rest. If we didn't transmit
259 * everything, stop now.
261 n_retry = (rv == DPDK_TX_RING_SIZE - tx_tail) ? 1 : 0;
264 else if (xd->dev_type == VNET_DPDK_DEV_VHOST_USER)
267 #if RTE_VERSION >= RTE_VERSION_NUM(2, 2, 0, 0)
268 if (PREDICT_TRUE(xd->lockp == NULL)) {
269 dpdk_device_and_queue_t * dq;
270 vec_foreach (dq, dm->devices_by_cpu[vm->cpu_index])
272 if (xd->device_index == dq->device)
276 offset = dq->queue_id * VIRTIO_QNUM;
278 offset = queue_id * VIRTIO_QNUM;
281 if (PREDICT_TRUE(tx_head > tx_tail))
283 /* no wrap, transmit in one burst */
284 rv = rte_vhost_enqueue_burst(&xd->vu_vhost_dev, offset + VIRTIO_RXQ,
286 (uint16_t) (tx_head-tx_tail));
287 if (PREDICT_TRUE(rv > 0))
289 if (dpdk_vhost_user_want_interrupt(xd, offset + VIRTIO_RXQ)) {
290 dpdk_vu_vring *vring = &(xd->vu_intf->vrings[offset + VIRTIO_RXQ]);
291 vring->n_since_last_int += rv;
293 f64 now = vlib_time_now (vm);
294 if (vring->int_deadline < now ||
295 vring->n_since_last_int > dm->vhost_coalesce_frames)
296 dpdk_vhost_user_send_interrupt(vm, xd, offset + VIRTIO_RXQ);
301 rte_pktmbuf_free (tx_vector[tx_tail+c]);
307 * If we transmitted everything we wanted, then allow 1 retry
308 * so we can try to transmit the rest. If we didn't transmit
309 * everything, stop now.
311 rv = rte_vhost_enqueue_burst(&xd->vu_vhost_dev, offset + VIRTIO_RXQ,
313 (uint16_t) (DPDK_TX_RING_SIZE - tx_tail));
315 if (PREDICT_TRUE(rv > 0))
317 if (dpdk_vhost_user_want_interrupt(xd, offset + VIRTIO_RXQ)) {
318 dpdk_vu_vring *vring = &(xd->vu_intf->vrings[offset + VIRTIO_RXQ]);
319 vring->n_since_last_int += rv;
321 f64 now = vlib_time_now (vm);
322 if (vring->int_deadline < now ||
323 vring->n_since_last_int > dm->vhost_coalesce_frames)
324 dpdk_vhost_user_send_interrupt(vm, xd, offset + VIRTIO_RXQ);
329 rte_pktmbuf_free (tx_vector[tx_tail+c]);
332 n_retry = (rv == DPDK_TX_RING_SIZE - tx_tail) ? 1 : 0;
336 else if (xd->dev_type == VNET_DPDK_DEV_KNI)
338 if (PREDICT_TRUE(tx_head > tx_tail))
340 /* no wrap, transmit in one burst */
341 rv = rte_kni_tx_burst(xd->kni,
343 (uint16_t) (tx_head-tx_tail));
348 * This can only happen if there is a flowcontrol callback.
349 * We need to split the transmit into two calls: one for
350 * the packets up to the wrap point, and one to continue
351 * at the start of the ring.
352 * Transmit pkts up to the wrap point.
354 rv = rte_kni_tx_burst(xd->kni,
356 (uint16_t) (DPDK_TX_RING_SIZE - tx_tail));
359 * If we transmitted everything we wanted, then allow 1 retry
360 * so we can try to transmit the rest. If we didn't transmit
361 * everything, stop now.
363 n_retry = (rv == DPDK_TX_RING_SIZE - tx_tail) ? 1 : 0;
373 if (PREDICT_FALSE(xd->lockp != 0))
374 *xd->lockp[queue_id] = 0;
376 if (PREDICT_FALSE(rv < 0))
378 // emit non-fatal message, bump counter
379 vnet_main_t * vnm = dm->vnet_main;
380 vnet_interface_main_t * im = &vnm->interface_main;
383 node_index = vec_elt_at_index(im->hw_interfaces,
384 xd->vlib_hw_if_index)->tx_node_index;
386 vlib_error_count (vm, node_index, DPDK_TX_FUNC_ERROR_BAD_RETVAL, 1);
387 clib_warning ("rte_eth_tx_burst[%d]: error %d", xd->device_index, rv);
388 return n_packets; // untransmitted packets
390 ring->tx_tail += (u16)rv;
391 n_packets -= (uint16_t) rv;
392 } while (rv && n_packets && (n_retry>0));
399 * This function transmits any packets on the interface's tx_vector and returns
400 * the number of packets untransmitted on the tx_vector. If the tx_vector is
401 * empty the function simply returns 0.
403 * It is intended to be called by a traffic manager which has flowed-off an
404 * interface to see if the interface can be flowed-on again.
406 u32 dpdk_interface_tx_vector (vlib_main_t * vm, u32 dev_instance)
408 dpdk_main_t * dm = &dpdk_main;
411 struct rte_mbuf ** tx_vector;
414 /* param is dev_instance and not hw_if_index to save another lookup */
415 xd = vec_elt_at_index (dm->devices, dev_instance);
417 queue_id = vm->cpu_index;
418 tx_vector = xd->tx_vectors[queue_id];
420 /* If no packets on the ring, don't bother calling tx function */
421 ring = vec_header(tx_vector, sizeof(*ring));
422 if (ring->tx_head == ring->tx_tail)
427 return tx_burst_vector_internal (vm, xd, tx_vector);
431 * Transmits the packets on the frame to the interface associated with the
432 * node. It first copies packets on the frame to a tx_vector containing the
433 * rte_mbuf pointers. It then passes this vector to tx_burst_vector_internal
434 * which calls the dpdk tx_burst function.
436 * The tx_vector is treated slightly differently depending on whether or
437 * not a flowcontrol callback function has been configured. If there is no
438 * callback, the tx_vector is a temporary array of rte_mbuf packet pointers.
439 * Its entries are written and consumed before the function exits.
441 * If there is a callback then the transmit is being invoked in the presence
442 * of a traffic manager. Here the tx_vector is treated like a ring of rte_mbuf
443 * pointers. If not all packets can be transmitted, the untransmitted packets
444 * stay on the tx_vector until the next call. The callback allows the traffic
445 * manager to flow-off dequeues to the interface. The companion function
446 * dpdk_interface_tx_vector() allows the traffic manager to detect when
447 * it should flow-on the interface again.
450 dpdk_interface_tx (vlib_main_t * vm,
451 vlib_node_runtime_t * node,
454 dpdk_main_t * dm = &dpdk_main;
455 vnet_interface_output_runtime_t * rd = (void *) node->runtime_data;
456 dpdk_device_t * xd = vec_elt_at_index (dm->devices, rd->dev_instance);
457 u32 n_packets = f->n_vectors;
460 struct rte_mbuf ** tx_vector;
468 my_cpu = vm->cpu_index;
472 tx_vector = xd->tx_vectors[queue_id];
473 ring = vec_header(tx_vector, sizeof(*ring));
475 n_on_ring = ring->tx_head - ring->tx_tail;
476 from = vlib_frame_vector_args (f);
478 ASSERT(n_packets <= VLIB_FRAME_SIZE);
480 if (PREDICT_FALSE(n_on_ring + n_packets > DPDK_TX_RING_SIZE))
483 * Overflowing the ring should never happen.
484 * If it does then drop the whole frame.
486 vlib_error_count (vm, node->node_index, DPDK_TX_FUNC_ERROR_RING_FULL,
491 u32 bi0 = from[n_packets];
492 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
493 struct rte_mbuf *mb0 = ((struct rte_mbuf *)b0) - 1;
494 rte_pktmbuf_free (mb0);
499 if (PREDICT_FALSE(dm->tx_pcap_enable))
505 vlib_buffer_t * b0 = vlib_get_buffer (vm, bi0);
506 if (dm->pcap_sw_if_index == 0 ||
507 dm->pcap_sw_if_index == vnet_buffer(b0)->sw_if_index [VLIB_TX])
508 pcap_add_buffer (&dm->pcap_main, vm, bi0, 512);
514 from = vlib_frame_vector_args (f);
516 i = ring->tx_head % DPDK_TX_RING_SIZE;
522 struct rte_mbuf * mb0, * mb1;
523 struct rte_mbuf * prefmb0, * prefmb1;
524 vlib_buffer_t * b0, * b1;
525 vlib_buffer_t * pref0, * pref1;
527 u16 new_data_len0, new_data_len1;
528 u16 new_pkt_len0, new_pkt_len1;
533 pref0 = vlib_get_buffer (vm, pi0);
534 pref1 = vlib_get_buffer (vm, pi1);
536 prefmb0 = ((struct rte_mbuf *)pref0) - 1;
537 prefmb1 = ((struct rte_mbuf *)pref1) - 1;
539 CLIB_PREFETCH(prefmb0, CLIB_CACHE_LINE_BYTES, LOAD);
540 CLIB_PREFETCH(pref0, CLIB_CACHE_LINE_BYTES, LOAD);
541 CLIB_PREFETCH(prefmb1, CLIB_CACHE_LINE_BYTES, LOAD);
542 CLIB_PREFETCH(pref1, CLIB_CACHE_LINE_BYTES, LOAD);
548 b0 = vlib_get_buffer (vm, bi0);
549 b1 = vlib_get_buffer (vm, bi1);
551 mb0 = ((struct rte_mbuf *)b0) - 1;
552 mb1 = ((struct rte_mbuf *)b1) - 1;
554 any_clone = b0->clone_count | b1->clone_count;
555 if (PREDICT_FALSE(any_clone != 0))
557 if (PREDICT_FALSE(b0->clone_count != 0))
559 struct rte_mbuf * mb0_new = dpdk_replicate_packet_mb (b0);
560 if (PREDICT_FALSE(mb0_new == 0))
562 vlib_error_count (vm, node->node_index,
563 DPDK_TX_FUNC_ERROR_REPL_FAIL, 1);
564 b0->flags |= VLIB_BUFFER_REPL_FAIL;
568 vec_add1 (dm->recycle[my_cpu], bi0);
570 if (PREDICT_FALSE(b1->clone_count != 0))
572 struct rte_mbuf * mb1_new = dpdk_replicate_packet_mb (b1);
573 if (PREDICT_FALSE(mb1_new == 0))
575 vlib_error_count (vm, node->node_index,
576 DPDK_TX_FUNC_ERROR_REPL_FAIL, 1);
577 b1->flags |= VLIB_BUFFER_REPL_FAIL;
581 vec_add1 (dm->recycle[my_cpu], bi1);
585 delta0 = PREDICT_FALSE(b0->flags & VLIB_BUFFER_REPL_FAIL) ? 0 :
586 vlib_buffer_length_in_chain (vm, b0) - (i16) mb0->pkt_len;
587 delta1 = PREDICT_FALSE(b1->flags & VLIB_BUFFER_REPL_FAIL) ? 0 :
588 vlib_buffer_length_in_chain (vm, b1) - (i16) mb1->pkt_len;
590 new_data_len0 = (u16)((i16) mb0->data_len + delta0);
591 new_data_len1 = (u16)((i16) mb1->data_len + delta1);
592 new_pkt_len0 = (u16)((i16) mb0->pkt_len + delta0);
593 new_pkt_len1 = (u16)((i16) mb1->pkt_len + delta1);
595 b0->current_length = new_data_len0;
596 b1->current_length = new_data_len1;
597 mb0->data_len = new_data_len0;
598 mb1->data_len = new_data_len1;
599 mb0->pkt_len = new_pkt_len0;
600 mb1->pkt_len = new_pkt_len1;
602 mb0->data_off = (PREDICT_FALSE(b0->flags & VLIB_BUFFER_REPL_FAIL)) ?
603 mb0->data_off : (u16)(RTE_PKTMBUF_HEADROOM + b0->current_data);
604 mb1->data_off = (PREDICT_FALSE(b1->flags & VLIB_BUFFER_REPL_FAIL)) ?
605 mb1->data_off : (u16)(RTE_PKTMBUF_HEADROOM + b1->current_data);
607 if (PREDICT_FALSE(node->flags & VLIB_NODE_FLAG_TRACE))
609 if (b0->flags & VLIB_BUFFER_IS_TRACED)
610 dpdk_tx_trace_buffer (dm, node, xd, queue_id, bi0, b0);
611 if (b1->flags & VLIB_BUFFER_IS_TRACED)
612 dpdk_tx_trace_buffer (dm, node, xd, queue_id, bi1, b1);
615 if (PREDICT_TRUE(any_clone == 0))
617 tx_vector[i % DPDK_TX_RING_SIZE] = mb0;
619 tx_vector[i % DPDK_TX_RING_SIZE] = mb1;
624 /* cloning was done, need to check for failure */
625 if (PREDICT_TRUE((b0->flags & VLIB_BUFFER_REPL_FAIL) == 0))
627 tx_vector[i % DPDK_TX_RING_SIZE] = mb0;
630 if (PREDICT_TRUE((b1->flags & VLIB_BUFFER_REPL_FAIL) == 0))
632 tx_vector[i % DPDK_TX_RING_SIZE] = mb1;
642 struct rte_mbuf * mb0;
651 b0 = vlib_get_buffer (vm, bi0);
653 mb0 = ((struct rte_mbuf *)b0) - 1;
654 if (PREDICT_FALSE(b0->clone_count != 0))
656 struct rte_mbuf * mb0_new = dpdk_replicate_packet_mb (b0);
657 if (PREDICT_FALSE(mb0_new == 0))
659 vlib_error_count (vm, node->node_index,
660 DPDK_TX_FUNC_ERROR_REPL_FAIL, 1);
661 b0->flags |= VLIB_BUFFER_REPL_FAIL;
665 vec_add1 (dm->recycle[my_cpu], bi0);
668 delta0 = PREDICT_FALSE(b0->flags & VLIB_BUFFER_REPL_FAIL) ? 0 :
669 vlib_buffer_length_in_chain (vm, b0) - (i16) mb0->pkt_len;
671 new_data_len0 = (u16)((i16) mb0->data_len + delta0);
672 new_pkt_len0 = (u16)((i16) mb0->pkt_len + delta0);
674 b0->current_length = new_data_len0;
675 mb0->data_len = new_data_len0;
676 mb0->pkt_len = new_pkt_len0;
677 mb0->data_off = (PREDICT_FALSE(b0->flags & VLIB_BUFFER_REPL_FAIL)) ?
678 mb0->data_off : (u16)(RTE_PKTMBUF_HEADROOM + b0->current_data);
680 if (PREDICT_FALSE(node->flags & VLIB_NODE_FLAG_TRACE))
681 if (b0->flags & VLIB_BUFFER_IS_TRACED)
682 dpdk_tx_trace_buffer (dm, node, xd, queue_id, bi0, b0);
684 if (PREDICT_TRUE((b0->flags & VLIB_BUFFER_REPL_FAIL) == 0))
686 tx_vector[i % DPDK_TX_RING_SIZE] = mb0;
692 /* account for additional packets in the ring */
693 ring->tx_head += n_packets;
694 n_on_ring = ring->tx_head - ring->tx_tail;
696 /* transmit as many packets as possible */
697 n_packets = tx_burst_vector_internal (vm, xd, tx_vector);
700 * tx_pkts is the number of packets successfully transmitted
701 * This is the number originally on ring minus the number remaining on ring
703 tx_pkts = n_on_ring - n_packets;
705 if (PREDICT_FALSE(dm->flowcontrol_callback != 0))
707 if (PREDICT_FALSE(n_packets))
709 /* Callback may want to enable flowcontrol */
710 dm->flowcontrol_callback(vm, xd->vlib_hw_if_index, ring->tx_head - ring->tx_tail);
714 /* Reset head/tail to avoid unnecessary wrap */
721 /* If there is no callback then drop any non-transmitted packets */
722 if (PREDICT_FALSE(n_packets))
724 vlib_simple_counter_main_t * cm;
725 vnet_main_t * vnm = vnet_get_main();
727 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
728 VNET_INTERFACE_COUNTER_TX_ERROR);
730 vlib_increment_simple_counter (cm, my_cpu, xd->vlib_sw_if_index, n_packets);
732 vlib_error_count (vm, node->node_index, DPDK_TX_FUNC_ERROR_PKT_DROP,
736 rte_pktmbuf_free (tx_vector[ring->tx_tail + n_packets]);
739 /* Reset head/tail to avoid unnecessary wrap */
744 /* Recycle replicated buffers */
745 if (PREDICT_FALSE(vec_len(dm->recycle[my_cpu])))
747 vlib_buffer_free (vm, dm->recycle[my_cpu], vec_len(dm->recycle[my_cpu]));
748 _vec_len(dm->recycle[my_cpu]) = 0;
751 ASSERT(ring->tx_head >= ring->tx_tail);
756 static int dpdk_device_renumber (vnet_hw_interface_t * hi,
757 u32 new_dev_instance)
759 dpdk_main_t * dm = &dpdk_main;
760 dpdk_device_t * xd = vec_elt_at_index (dm->devices, hi->dev_instance);
762 if (!xd || xd->dev_type != VNET_DPDK_DEV_VHOST_USER) {
763 clib_warning("cannot renumber non-vhost-user interface (sw_if_index: %d)",
768 xd->vu_if_id = new_dev_instance;
772 static u8 * format_dpdk_device_name (u8 * s, va_list * args)
774 dpdk_main_t * dm = &dpdk_main;
775 char *devname_format;
777 u32 i = va_arg (*args, u32);
778 struct rte_eth_dev_info dev_info;
781 if (dm->interface_name_format_decimal)
782 devname_format = "%s%d/%d/%d";
784 devname_format = "%s%x/%x/%x";
786 #ifdef RTE_LIBRTE_KNI
787 if (dm->devices[i].dev_type == VNET_DPDK_DEV_KNI) {
788 return format(s, "kni%d", dm->devices[i].kni_port_id);
791 if (dm->devices[i].dev_type == VNET_DPDK_DEV_VHOST_USER) {
792 return format(s, "VirtualEthernet0/0/%d", dm->devices[i].vu_if_id);
794 switch (dm->devices[i].port_type)
796 case VNET_DPDK_PORT_TYPE_ETH_1G:
797 device_name = "GigabitEthernet";
800 case VNET_DPDK_PORT_TYPE_ETH_10G:
801 device_name = "TenGigabitEthernet";
804 case VNET_DPDK_PORT_TYPE_ETH_40G:
805 device_name = "FortyGigabitEthernet";
808 case VNET_DPDK_PORT_TYPE_ETH_SWITCH:
809 device_name = "EthernetSwitch";
813 case VNET_DPDK_PORT_TYPE_NETMAP:
814 rte_eth_dev_info_get(i, &dev_info);
815 return format(s, "netmap:%s", dev_info.driver_name);
818 case VNET_DPDK_PORT_TYPE_AF_PACKET:
819 rte_eth_dev_info_get(i, &dev_info);
820 return format(s, "af_packet%d", dm->devices[i].af_packet_port_id);
823 case VNET_DPDK_PORT_TYPE_UNKNOWN:
824 device_name = "UnknownEthernet";
828 rte_eth_dev_info_get(i, &dev_info);
829 ret = format (s, devname_format, device_name, dev_info.pci_dev->addr.bus,
830 dev_info.pci_dev->addr.devid,
831 dev_info.pci_dev->addr.function);
833 /* address Chelsio cards which share PCI address */
834 if (dm->devices[i].pmd == VNET_DPDK_PMD_CXGBE) {
835 struct rte_eth_dev_info di;
838 rte_eth_dev_info_get(i+1, &di);
839 if (di.pci_dev && memcmp(&dev_info.pci_dev->addr, &di.pci_dev->addr,
840 sizeof(struct rte_pci_addr)) == 0)
841 return format(ret, "/0");
844 rte_eth_dev_info_get(i-1, &di);
845 if (di.pci_dev && memcmp(&dev_info.pci_dev->addr, &di.pci_dev->addr,
846 sizeof(struct rte_pci_addr)) == 0)
847 return format(ret, "/1");
852 static u8 * format_dpdk_device_type (u8 * s, va_list * args)
854 dpdk_main_t * dm = &dpdk_main;
856 u32 i = va_arg (*args, u32);
858 if (dm->devices[i].dev_type == VNET_DPDK_DEV_KNI) {
859 return format(s, "Kernel NIC Interface");
860 } else if (dm->devices[i].dev_type == VNET_DPDK_DEV_VHOST_USER) {
861 return format(s, "vhost-user interface");
864 switch (dm->devices[i].pmd)
866 case VNET_DPDK_PMD_E1000EM:
867 dev_type = "Intel 82540EM (e1000)";
870 case VNET_DPDK_PMD_IGB:
871 dev_type = "Intel e1000";
874 case VNET_DPDK_PMD_I40E:
875 dev_type = "Intel X710/XL710 Family";
878 case VNET_DPDK_PMD_I40EVF:
879 dev_type = "Intel X710/XL710 Family VF";
882 case VNET_DPDK_PMD_FM10K:
883 dev_type = "Intel FM10000 Family Ethernet Switch";
886 case VNET_DPDK_PMD_IGBVF:
887 dev_type = "Intel e1000 VF";
890 case VNET_DPDK_PMD_VIRTIO:
891 dev_type = "Red Hat Virtio";
894 case VNET_DPDK_PMD_IXGBEVF:
895 dev_type = "Intel 82599 VF";
898 case VNET_DPDK_PMD_IXGBE:
899 dev_type = "Intel 82599";
902 case VNET_DPDK_PMD_VICE:
903 case VNET_DPDK_PMD_ENIC:
904 dev_type = "Cisco VIC";
907 case VNET_DPDK_PMD_CXGBE:
908 dev_type = "Chelsio T4/T5";
911 case VNET_DPDK_PMD_VMXNET3:
912 dev_type = "VMware VMXNET3";
916 case VNET_DPDK_PMD_NETMAP:
917 dev_type = "Netmap/Vale";
921 case VNET_DPDK_PMD_AF_PACKET:
922 dev_type = "af_packet";
926 case VNET_DPDK_PMD_UNKNOWN:
927 dev_type = "### UNKNOWN ###";
931 return format (s, dev_type);
934 static u8 * format_dpdk_link_status (u8 * s, va_list * args)
936 dpdk_device_t * xd = va_arg (*args, dpdk_device_t *);
937 struct rte_eth_link * l = &xd->link;
938 vnet_main_t * vnm = vnet_get_main();
939 vnet_hw_interface_t * hi = vnet_get_hw_interface (vnm, xd->vlib_hw_if_index);
941 s = format (s, "%s ", l->link_status ? "up" : "down");
944 u32 promisc = rte_eth_promiscuous_get (xd->device_index);
946 s = format (s, "%s duplex ", (l->link_duplex == ETH_LINK_FULL_DUPLEX) ?
948 s = format (s, "speed %u mtu %d %s\n", l->link_speed,
949 hi->max_packet_bytes, promisc ? " promisc" : "");
952 s = format (s, "\n");
960 if (format_get_indent (s) > next_split ) { \
961 next_split += _line_len; \
962 s = format(s,"\n%U", format_white_space, indent); \
964 s = format(s, "%s ", str); \
967 static u8 * format_dpdk_rss_hf_name(u8 * s, va_list * args)
969 u64 bitmap = va_arg (*args, u64);
970 int next_split = _line_len;
971 int indent = format_get_indent (s);
974 return format(s, "none");
981 static u8 * format_dpdk_rx_offload_caps(u8 * s, va_list * args)
983 u32 bitmap = va_arg (*args, u32);
984 int next_split = _line_len;
985 int indent = format_get_indent (s);
988 return format(s, "none");
990 foreach_dpdk_rx_offload_caps
995 static u8 * format_dpdk_tx_offload_caps(u8 * s, va_list * args)
997 u32 bitmap = va_arg (*args, u32);
998 int next_split = _line_len;
999 int indent = format_get_indent (s);
1001 return format(s, "none");
1003 foreach_dpdk_tx_offload_caps
1011 static u8 * format_dpdk_device (u8 * s, va_list * args)
1013 u32 dev_instance = va_arg (*args, u32);
1014 int verbose = va_arg (*args, int);
1015 dpdk_main_t * dm = &dpdk_main;
1016 dpdk_device_t * xd = vec_elt_at_index (dm->devices, dev_instance);
1017 uword indent = format_get_indent (s);
1018 f64 now = vlib_time_now (dm->vlib_main);
1020 dpdk_update_counters (xd, now);
1021 dpdk_update_link_state (xd, now);
1023 s = format (s, "%U\n%Ucarrier %U",
1024 format_dpdk_device_type, xd->device_index,
1025 format_white_space, indent + 2,
1026 format_dpdk_link_status, xd);
1028 if (verbose > 1 && xd->dev_type == VNET_DPDK_DEV_ETH)
1030 struct rte_eth_dev_info di;
1031 struct rte_pci_device * pci;
1032 struct rte_eth_rss_conf rss_conf;
1035 rss_conf.rss_key = 0;
1036 rte_eth_dev_info_get(xd->device_index, &di);
1037 rte_eth_dev_rss_hash_conf_get(xd->device_index, &rss_conf);
1041 s = format(s, "%Upci id: device %04x:%04x subsystem %04x:%04x\n"
1042 "%Upci address: %04x:%02x:%02x.%02x\n",
1043 format_white_space, indent + 2,
1044 pci->id.vendor_id, pci->id.device_id,
1045 pci->id.subsystem_vendor_id,
1046 pci->id.subsystem_device_id,
1047 format_white_space, indent + 2,
1048 pci->addr.domain, pci->addr.bus,
1049 pci->addr.devid, pci->addr.function);
1050 s = format(s, "%Umax rx packet len: %d\n",
1051 format_white_space, indent + 2, di.max_rx_pktlen);
1052 s = format(s, "%Upromiscuous: unicast %s all-multicast %s\n",
1053 format_white_space, indent + 2,
1054 rte_eth_promiscuous_get(xd->device_index) ? "on" : "off",
1055 rte_eth_promiscuous_get(xd->device_index) ? "on" : "off");
1056 vlan_off = rte_eth_dev_get_vlan_offload(xd->device_index);
1057 s = format(s, "%Uvlan offload: strip %s filter %s qinq %s\n",
1058 format_white_space, indent + 2,
1059 vlan_off & ETH_VLAN_STRIP_OFFLOAD ? "on" : "off",
1060 vlan_off & ETH_VLAN_FILTER_OFFLOAD ? "on" : "off",
1061 vlan_off & ETH_VLAN_EXTEND_OFFLOAD ? "on" : "off");
1062 s = format(s, "%Uqueue size (max): rx %d (%d) tx %d (%d)\n",
1063 format_white_space, indent + 2,
1064 xd->rx_q_used, di.max_rx_queues,
1065 xd->tx_q_used, di.max_tx_queues);
1066 s = format(s, "%Urx offload caps: %U\n",
1067 format_white_space, indent + 2,
1068 format_dpdk_rx_offload_caps, di.rx_offload_capa);
1069 s = format(s, "%Utx offload caps: %U\n",
1070 format_white_space, indent + 2,
1071 format_dpdk_tx_offload_caps, di.tx_offload_capa);
1072 s = format(s, "%Urss active: %U\n"
1073 "%Urss supported: %U\n",
1074 format_white_space, indent + 2,
1075 format_dpdk_rss_hf_name, rss_conf.rss_hf,
1076 format_white_space, indent + 2,
1077 format_dpdk_rss_hf_name, di.flow_type_rss_offloads);
1080 if (xd->cpu_socket > -1)
1081 s = format (s, "%Ucpu socket %d",
1082 format_white_space, indent + 2,
1085 /* $$$ MIB counters */
1089 if (xd->stats.V != 0) \
1090 s = format (s, "\n%U%-40U%16Ld", \
1091 format_white_space, indent + 2, \
1092 format_c_identifier, #N, xd->stats.V);
1094 foreach_dpdk_counter
1099 struct rte_eth_xstats * xstat;
1101 vec_foreach(xstat, xd->xstats)
1105 /* format_c_identifier don't like c strings inside vector */
1106 u8 * name = format(0,"%s", xstat->name);
1107 xs = format(xs, "\n%U%-38U%16Ld",
1108 format_white_space, indent + 4,
1109 format_c_identifier, name, xstat->value);
1116 s = format(s, "\n%Uextended stats:%v",
1117 format_white_space, indent + 2, xs);
1124 static u8 * format_dpdk_tx_dma_trace (u8 * s, va_list * va)
1126 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
1127 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
1128 CLIB_UNUSED (vnet_main_t * vnm) = vnet_get_main();
1129 dpdk_tx_dma_trace_t * t = va_arg (*va, dpdk_tx_dma_trace_t *);
1130 dpdk_main_t * dm = &dpdk_main;
1131 dpdk_device_t * xd = vec_elt_at_index (dm->devices, t->device_index);
1132 uword indent = format_get_indent (s);
1133 vnet_sw_interface_t * sw = vnet_get_sw_interface (vnm, xd->vlib_sw_if_index);
1135 s = format (s, "%U tx queue %d",
1136 format_vnet_sw_interface_name, vnm, sw,
1139 s = format (s, "\n%Ubuffer 0x%x: %U",
1140 format_white_space, indent,
1142 format_vlib_buffer, &t->buffer);
1144 s = format (s, "\n%U%U", format_white_space, indent,
1145 format_ethernet_header_with_length, t->buffer.pre_data,
1146 sizeof (t->buffer.pre_data));
1151 static void dpdk_clear_hw_interface_counters (u32 instance)
1153 dpdk_main_t * dm = &dpdk_main;
1154 dpdk_device_t * xd = vec_elt_at_index (dm->devices, instance);
1157 * DAW-FIXME: VMXNET3 device stop/start doesn't work,
1158 * therefore fake the stop in the dpdk driver by
1159 * silently dropping all of the incoming pkts instead of
1160 * stopping the driver / hardware.
1162 if (xd->admin_up != 0xff)
1164 rte_eth_stats_reset (xd->device_index);
1165 memset (&xd->last_stats, 0, sizeof (xd->last_stats));
1166 dpdk_update_counters (xd, vlib_time_now (dm->vlib_main));
1170 rte_eth_stats_reset (xd->device_index);
1171 memset(&xd->stats, 0, sizeof(xd->stats));
1172 memset (&xd->last_stats, 0, sizeof (xd->last_stats));
1174 rte_eth_xstats_reset(xd->device_index);
1177 #ifdef RTE_LIBRTE_KNI
1179 kni_config_network_if(u8 port_id, u8 if_up)
1181 vnet_main_t * vnm = vnet_get_main();
1182 dpdk_main_t * dm = &dpdk_main;
1186 p = hash_get (dm->dpdk_device_by_kni_port_id, port_id);
1188 clib_warning("unknown interface");
1191 xd = vec_elt_at_index (dm->devices, p[0]);
1194 vnet_hw_interface_set_flags (vnm, xd->vlib_hw_if_index,
1195 if_up ? VNET_HW_INTERFACE_FLAG_LINK_UP |
1196 ETH_LINK_FULL_DUPLEX : 0);
1201 kni_change_mtu(u8 port_id, unsigned new_mtu)
1203 vnet_main_t * vnm = vnet_get_main();
1204 dpdk_main_t * dm = &dpdk_main;
1207 vnet_hw_interface_t * hif;
1209 p = hash_get (dm->dpdk_device_by_kni_port_id, port_id);
1211 clib_warning("unknown interface");
1214 xd = vec_elt_at_index (dm->devices, p[0]);
1216 hif = vnet_get_hw_interface (vnm, xd->vlib_hw_if_index);
1218 hif->max_packet_bytes = new_mtu;
1224 static clib_error_t *
1225 dpdk_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
1227 vnet_hw_interface_t * hif = vnet_get_hw_interface (vnm, hw_if_index);
1228 uword is_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
1229 dpdk_main_t * dm = &dpdk_main;
1230 dpdk_device_t * xd = vec_elt_at_index (dm->devices, hif->dev_instance);
1233 #ifdef RTE_LIBRTE_KNI
1234 if (xd->dev_type == VNET_DPDK_DEV_KNI)
1238 struct rte_kni_conf conf;
1239 struct rte_kni_ops ops;
1240 vlib_main_t * vm = vlib_get_main();
1241 vlib_buffer_main_t * bm = vm->buffer_main;
1242 memset(&conf, 0, sizeof(conf));
1243 snprintf(conf.name, RTE_KNI_NAMESIZE, "vpp%u", xd->kni_port_id);
1244 conf.mbuf_size = MBUF_SIZE;
1245 memset(&ops, 0, sizeof(ops));
1246 ops.port_id = xd->kni_port_id;
1247 ops.change_mtu = kni_change_mtu;
1248 ops.config_network_if = kni_config_network_if;
1250 xd->kni = rte_kni_alloc(bm->pktmbuf_pools[rte_socket_id()], &conf, &ops);
1253 clib_warning("failed to allocate kni interface");
1257 hif->max_packet_bytes = 1500; /* kni interface default value */
1264 rte_kni_release(xd->kni);
1269 if (xd->dev_type == VNET_DPDK_DEV_VHOST_USER)
1273 if (xd->vu_is_running)
1274 vnet_hw_interface_set_flags (vnm, xd->vlib_hw_if_index,
1275 VNET_HW_INTERFACE_FLAG_LINK_UP |
1276 ETH_LINK_FULL_DUPLEX );
1281 vnet_hw_interface_set_flags (vnm, xd->vlib_hw_if_index, 0);
1291 f64 now = vlib_time_now (dm->vlib_main);
1294 * DAW-FIXME: VMXNET3 device stop/start doesn't work,
1295 * therefore fake the stop in the dpdk driver by
1296 * silently dropping all of the incoming pkts instead of
1297 * stopping the driver / hardware.
1299 if (xd->admin_up == 0)
1300 rv = rte_eth_dev_start (xd->device_index);
1303 rte_eth_promiscuous_enable(xd->device_index);
1305 rte_eth_promiscuous_disable(xd->device_index);
1307 rte_eth_allmulticast_enable (xd->device_index);
1309 dpdk_update_counters (xd, now);
1310 dpdk_update_link_state (xd, now);
1314 rte_eth_allmulticast_disable (xd->device_index);
1315 vnet_hw_interface_set_flags (vnm, xd->vlib_hw_if_index, 0);
1318 * DAW-FIXME: VMXNET3 device stop/start doesn't work,
1319 * therefore fake the stop in the dpdk driver by
1320 * silently dropping all of the incoming pkts instead of
1321 * stopping the driver / hardware.
1323 if (xd->pmd != VNET_DPDK_PMD_VMXNET3)
1325 rte_eth_dev_stop (xd->device_index);
1333 clib_warning ("rte_eth_dev_%s error: %d", is_up ? "start" : "stop",
1336 return /* no error */ 0;
1340 * Dynamically redirect all pkts from a specific interface
1341 * to the specified node
1343 static void dpdk_set_interface_next_node (vnet_main_t *vnm, u32 hw_if_index,
1346 dpdk_main_t * xm = &dpdk_main;
1347 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
1348 dpdk_device_t * xd = vec_elt_at_index (xm->devices, hw->dev_instance);
1350 /* Shut off redirection */
1351 if (node_index == ~0)
1353 xd->per_interface_next_index = node_index;
1357 xd->per_interface_next_index =
1358 vlib_node_add_next (xm->vlib_main, dpdk_input_node.index, node_index);
1362 static clib_error_t *
1363 dpdk_subif_add_del_function (vnet_main_t * vnm,
1365 struct vnet_sw_interface_t * st,
1368 dpdk_main_t * xm = &dpdk_main;
1369 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
1370 dpdk_device_t * xd = vec_elt_at_index (xm->devices, hw->dev_instance);
1371 vnet_sw_interface_t * t = (vnet_sw_interface_t *) st;
1372 int r, vlan_offload;
1375 if (xd->dev_type != VNET_DPDK_DEV_ETH)
1377 /* currently we program VLANS only for IXGBE VF */
1378 if (xd->pmd != VNET_DPDK_PMD_IXGBEVF)
1381 if (t->sub.eth.flags.no_tags == 1)
1384 if ((t->sub.eth.flags.one_tag != 1) || (t->sub.eth.flags.exact_match != 1 ))
1385 return clib_error_return (0, "unsupported VLAN setup");
1388 vlan_offload = rte_eth_dev_get_vlan_offload(xd->device_index);
1389 vlan_offload |= ETH_VLAN_FILTER_OFFLOAD;
1391 if ((r = rte_eth_dev_set_vlan_offload(xd->device_index, vlan_offload)))
1392 return clib_error_return (0, "rte_eth_dev_set_vlan_offload[%d]: err %d",
1393 xd->device_index, r);
1396 if ((r = rte_eth_dev_vlan_filter(xd->device_index, t->sub.eth.outer_vlan_id, is_add)))
1397 return clib_error_return (0, "rte_eth_dev_vlan_filter[%d]: err %d",
1398 xd->device_index, r);
1403 VNET_DEVICE_CLASS (dpdk_device_class) = {
1405 .tx_function = dpdk_interface_tx,
1406 .tx_function_n_errors = DPDK_TX_FUNC_N_ERROR,
1407 .tx_function_error_strings = dpdk_tx_func_error_strings,
1408 .format_device_name = format_dpdk_device_name,
1409 .format_device = format_dpdk_device,
1410 .format_tx_trace = format_dpdk_tx_dma_trace,
1411 .clear_counters = dpdk_clear_hw_interface_counters,
1412 .admin_up_down_function = dpdk_interface_admin_up_down,
1413 .subif_add_del_function = dpdk_subif_add_del_function,
1414 .rx_redirect_to_node = dpdk_set_interface_next_node,
1415 .no_flatten_output_chains = 1,
1416 .name_renumber = dpdk_device_renumber,
1419 void dpdk_set_flowcontrol_callback (vlib_main_t *vm,
1420 dpdk_flowcontrol_callback_t callback)
1422 dpdk_main.flowcontrol_callback = callback;
1425 #define UP_DOWN_FLAG_EVENT 1
1428 u32 dpdk_get_admin_up_down_in_progress (void)
1430 return dpdk_main.admin_up_down_in_progress;
1434 admin_up_down_process (vlib_main_t * vm,
1435 vlib_node_runtime_t * rt,
1438 clib_error_t * error = 0;
1440 uword *event_data = 0;
1447 vlib_process_wait_for_event (vm);
1449 event_type = vlib_process_get_events (vm, &event_data);
1451 dpdk_main.admin_up_down_in_progress = 1;
1453 for (index=0; index<vec_len(event_data); index++)
1455 sw_if_index = event_data[index] >> 32;
1456 flags = (u32) event_data[index];
1458 switch (event_type) {
1459 case UP_DOWN_FLAG_EVENT:
1460 error = vnet_sw_interface_set_flags (vnet_get_main(), sw_if_index, flags);
1461 clib_error_report(error);
1466 vec_reset_length (event_data);
1468 dpdk_main.admin_up_down_in_progress = 0;
1471 return 0; /* or not */
1474 VLIB_REGISTER_NODE (admin_up_down_process_node,static) = {
1475 .function = admin_up_down_process,
1476 .type = VLIB_NODE_TYPE_PROCESS,
1477 .name = "admin-up-down-process",
1478 .process_log2_n_stack_bytes = 17, // 256KB
1482 * Asynchronously invoke vnet_sw_interface_set_flags via the admin_up_down
1483 * process. Useful for avoiding long blocking delays (>150ms) in the dpdk
1485 * WARNING: when posting this event, no other interface-related calls should
1486 * be made (e.g. vnet_create_sw_interface()) while the event is being
1487 * processed (admin_up_down_in_progress). This is required in order to avoid
1488 * race conditions in manipulating interface data structures.
1490 void post_sw_interface_set_flags (vlib_main_t *vm, u32 sw_if_index, u32 flags)
1492 vlib_process_signal_event
1493 (vm, admin_up_down_process_node.index,
1495 (((uword)sw_if_index << 32) | flags));
1499 * Called by the dpdk driver's rte_delay_us() function.
1500 * Return 0 to have the dpdk do a regular delay loop.
1501 * Return 1 if to skip the delay loop because we are suspending
1502 * the calling vlib process instead.
1504 int rte_delay_us_override (unsigned us) {
1507 /* Don't bother intercepting for short delays */
1508 if (us < 10) return 0;
1511 * Only intercept if we are in a vlib process.
1512 * If we are called from a vlib worker thread or the vlib main
1513 * thread then do not intercept. (Must not be called from an
1514 * independent pthread).
1516 if (os_get_cpu_number() == 0)
1519 * We're in the vlib main thread or a vlib process. Make sure
1520 * the process is running and we're not still initializing.
1522 vm = vlib_get_main();
1523 if (vlib_in_process_context(vm))
1525 /* Only suspend for the admin_down_process */
1526 vlib_process_t * proc = vlib_get_current_process(vm);
1527 if (!(proc->flags & VLIB_PROCESS_IS_RUNNING) ||
1528 (proc->node_runtime.function != admin_up_down_process))
1531 f64 delay = 1e-6 * us;
1532 vlib_process_suspend(vm, delay);
1536 return 0; // no override