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);
117 dpdk_tx_trace_buffer (dpdk_main_t * dm,
118 vlib_node_runtime_t * node,
122 vlib_buffer_t * buffer)
124 vlib_main_t * vm = vlib_get_main();
125 dpdk_tx_dma_trace_t * t0;
126 struct rte_mbuf * mb;
128 mb = ((struct rte_mbuf *)buffer)-1;
130 t0 = vlib_add_trace (vm, node, buffer, sizeof (t0[0]));
131 t0->queue_index = queue_id;
132 t0->device_index = xd->device_index;
133 t0->buffer_index = buffer_index;
134 memcpy (&t0->mb, mb, sizeof (t0->mb));
135 memcpy (&t0->buffer, buffer, sizeof (buffer[0]) - sizeof (buffer->pre_data));
136 memcpy (t0->buffer.pre_data, buffer->data + buffer->current_data,
137 sizeof (t0->buffer.pre_data));
141 * This function calls the dpdk's tx_burst function to transmit the packets
142 * on the tx_vector. It manages a lock per-device if the device does not
143 * support multiple queues. It returns the number of packets untransmitted
144 * on the tx_vector. If all packets are transmitted (the normal case), the
145 * function returns 0.
147 * The tx_burst function may not be able to transmit all packets because the
148 * dpdk ring is full. If a flowcontrol callback function has been configured
149 * then the function simply returns. If no callback has been configured, the
150 * function will retry calling tx_burst with the remaining packets. This will
151 * continue until all packets are transmitted or tx_burst indicates no packets
152 * could be transmitted. (The caller can drop the remaining packets.)
154 * The function assumes there is at least one packet on the tx_vector.
157 u32 tx_burst_vector_internal (vlib_main_t * vm,
159 struct rte_mbuf ** tx_vector)
161 dpdk_main_t * dm = &dpdk_main;
170 ring = vec_header(tx_vector, sizeof(*ring));
172 n_packets = ring->tx_head - ring->tx_tail;
174 tx_head = ring->tx_head % DPDK_TX_RING_SIZE;
177 * Ensure rte_eth_tx_burst is not called with 0 packets, which can lead to
178 * unpredictable results.
180 ASSERT(n_packets > 0);
183 * Check for tx_vector overflow. If this fails it is a system configuration
184 * error. The ring should be sized big enough to handle the largest un-flowed
185 * off burst from a traffic manager. A larger size also helps performance
186 * a bit because it decreases the probability of having to issue two tx_burst
187 * calls due to a ring wrap.
189 ASSERT(n_packets < DPDK_TX_RING_SIZE);
192 * If there is no flowcontrol callback, there is only temporary buffering
193 * on the tx_vector and so the tail should always be 0.
195 ASSERT(dm->flowcontrol_callback || ring->tx_tail == 0);
198 * If there is a flowcontrol callback, don't retry any incomplete tx_bursts.
199 * Apply backpressure instead. If there is no callback, keep retrying until
200 * a tx_burst sends no packets. n_retry of 255 essentially means no retry
203 n_retry = dm->flowcontrol_callback ? 0 : 255;
205 queue_id = vm->cpu_index;
208 /* start the burst at the tail */
209 tx_tail = ring->tx_tail % DPDK_TX_RING_SIZE;
212 * This device only supports one TX queue,
213 * and we're running multi-threaded...
215 if (PREDICT_FALSE(xd->dev_type != VNET_DPDK_DEV_VHOST_USER &&
218 queue_id = queue_id % xd->tx_q_used;
219 while (__sync_lock_test_and_set (xd->lockp[queue_id], 1))
221 queue_id = (queue_id + 1) % xd->tx_q_used;
224 if (PREDICT_TRUE(xd->dev_type == VNET_DPDK_DEV_ETH))
226 if (PREDICT_TRUE(tx_head > tx_tail))
228 /* no wrap, transmit in one burst */
229 rv = rte_eth_tx_burst(xd->device_index,
232 (uint16_t) (tx_head-tx_tail));
237 * This can only happen if there is a flowcontrol callback.
238 * We need to split the transmit into two calls: one for
239 * the packets up to the wrap point, and one to continue
240 * at the start of the ring.
241 * Transmit pkts up to the wrap point.
243 rv = rte_eth_tx_burst(xd->device_index,
246 (uint16_t) (DPDK_TX_RING_SIZE - tx_tail));
249 * If we transmitted everything we wanted, then allow 1 retry
250 * so we can try to transmit the rest. If we didn't transmit
251 * everything, stop now.
253 n_retry = (rv == DPDK_TX_RING_SIZE - tx_tail) ? 1 : 0;
256 else if (xd->dev_type == VNET_DPDK_DEV_VHOST_USER)
259 if (xd->need_txlock) {
261 while (__sync_lock_test_and_set (xd->lockp[queue_id], 1));
263 #if RTE_VERSION >= RTE_VERSION_NUM(2, 2, 0, 0)
265 dpdk_device_and_queue_t * dq;
266 vec_foreach (dq, dm->devices_by_cpu[vm->cpu_index])
268 if (xd->device_index == dq->device)
272 offset = dq->queue_id * VIRTIO_QNUM;
275 if (PREDICT_TRUE(tx_head > tx_tail))
277 /* no wrap, transmit in one burst */
278 rv = rte_vhost_enqueue_burst(&xd->vu_vhost_dev, offset + VIRTIO_RXQ,
280 (uint16_t) (tx_head-tx_tail));
281 if (PREDICT_TRUE(rv > 0))
283 if (dpdk_vhost_user_want_interrupt(xd, offset + VIRTIO_RXQ)) {
284 dpdk_vu_vring *vring = &(xd->vu_intf->vrings[offset + VIRTIO_RXQ]);
285 vring->n_since_last_int += rv;
287 f64 now = vlib_time_now (vm);
288 if (vring->int_deadline < now ||
289 vring->n_since_last_int > dm->vhost_coalesce_frames)
290 dpdk_vhost_user_send_interrupt(vm, xd, offset + VIRTIO_RXQ);
295 rte_pktmbuf_free (tx_vector[tx_tail+c]);
301 * If we transmitted everything we wanted, then allow 1 retry
302 * so we can try to transmit the rest. If we didn't transmit
303 * everything, stop now.
305 rv = rte_vhost_enqueue_burst(&xd->vu_vhost_dev, offset + VIRTIO_RXQ,
307 (uint16_t) (DPDK_TX_RING_SIZE - tx_tail));
309 if (PREDICT_TRUE(rv > 0))
311 if (dpdk_vhost_user_want_interrupt(xd, offset + VIRTIO_RXQ)) {
312 dpdk_vu_vring *vring = &(xd->vu_intf->vrings[offset + VIRTIO_RXQ]);
313 vring->n_since_last_int += rv;
315 f64 now = vlib_time_now (vm);
316 if (vring->int_deadline < now ||
317 vring->n_since_last_int > dm->vhost_coalesce_frames)
318 dpdk_vhost_user_send_interrupt(vm, xd, offset + VIRTIO_RXQ);
323 rte_pktmbuf_free (tx_vector[tx_tail+c]);
326 n_retry = (rv == DPDK_TX_RING_SIZE - tx_tail) ? 1 : 0;
330 *xd->lockp[queue_id] = 0;
333 else if (xd->dev_type == VNET_DPDK_DEV_KNI)
335 if (PREDICT_TRUE(tx_head > tx_tail))
337 /* no wrap, transmit in one burst */
338 rv = rte_kni_tx_burst(xd->kni,
340 (uint16_t) (tx_head-tx_tail));
345 * This can only happen if there is a flowcontrol callback.
346 * We need to split the transmit into two calls: one for
347 * the packets up to the wrap point, and one to continue
348 * at the start of the ring.
349 * Transmit pkts up to the wrap point.
351 rv = rte_kni_tx_burst(xd->kni,
353 (uint16_t) (DPDK_TX_RING_SIZE - tx_tail));
356 * If we transmitted everything we wanted, then allow 1 retry
357 * so we can try to transmit the rest. If we didn't transmit
358 * everything, stop now.
360 n_retry = (rv == DPDK_TX_RING_SIZE - tx_tail) ? 1 : 0;
370 if (PREDICT_FALSE(xd->dev_type != VNET_DPDK_DEV_VHOST_USER &&
372 *xd->lockp[queue_id] = 0;
374 if (PREDICT_FALSE(rv < 0))
376 // emit non-fatal message, bump counter
377 vnet_main_t * vnm = dm->vnet_main;
378 vnet_interface_main_t * im = &vnm->interface_main;
381 node_index = vec_elt_at_index(im->hw_interfaces,
382 xd->vlib_hw_if_index)->tx_node_index;
384 vlib_error_count (vm, node_index, DPDK_TX_FUNC_ERROR_BAD_RETVAL, 1);
385 clib_warning ("rte_eth_tx_burst[%d]: error %d", xd->device_index, rv);
386 return n_packets; // untransmitted packets
388 ring->tx_tail += (u16)rv;
389 n_packets -= (uint16_t) rv;
390 } while (rv && n_packets && (n_retry>0));
397 * This function transmits any packets on the interface's tx_vector and returns
398 * the number of packets untransmitted on the tx_vector. If the tx_vector is
399 * empty the function simply returns 0.
401 * It is intended to be called by a traffic manager which has flowed-off an
402 * interface to see if the interface can be flowed-on again.
404 u32 dpdk_interface_tx_vector (vlib_main_t * vm, u32 dev_instance)
406 dpdk_main_t * dm = &dpdk_main;
409 struct rte_mbuf ** tx_vector;
412 /* param is dev_instance and not hw_if_index to save another lookup */
413 xd = vec_elt_at_index (dm->devices, dev_instance);
415 queue_id = vm->cpu_index;
416 tx_vector = xd->tx_vectors[queue_id];
418 /* If no packets on the ring, don't bother calling tx function */
419 ring = vec_header(tx_vector, sizeof(*ring));
420 if (ring->tx_head == ring->tx_tail)
425 return tx_burst_vector_internal (vm, xd, tx_vector);
429 * Transmits the packets on the frame to the interface associated with the
430 * node. It first copies packets on the frame to a tx_vector containing the
431 * rte_mbuf pointers. It then passes this vector to tx_burst_vector_internal
432 * which calls the dpdk tx_burst function.
434 * The tx_vector is treated slightly differently depending on whether or
435 * not a flowcontrol callback function has been configured. If there is no
436 * callback, the tx_vector is a temporary array of rte_mbuf packet pointers.
437 * Its entries are written and consumed before the function exits.
439 * If there is a callback then the transmit is being invoked in the presence
440 * of a traffic manager. Here the tx_vector is treated like a ring of rte_mbuf
441 * pointers. If not all packets can be transmitted, the untransmitted packets
442 * stay on the tx_vector until the next call. The callback allows the traffic
443 * manager to flow-off dequeues to the interface. The companion function
444 * dpdk_interface_tx_vector() allows the traffic manager to detect when
445 * it should flow-on the interface again.
448 dpdk_interface_tx (vlib_main_t * vm,
449 vlib_node_runtime_t * node,
452 dpdk_main_t * dm = &dpdk_main;
453 vnet_interface_output_runtime_t * rd = (void *) node->runtime_data;
454 dpdk_device_t * xd = vec_elt_at_index (dm->devices, rd->dev_instance);
455 u32 n_packets = f->n_vectors;
458 struct rte_mbuf ** tx_vector;
466 my_cpu = vm->cpu_index;
470 tx_vector = xd->tx_vectors[queue_id];
471 ring = vec_header(tx_vector, sizeof(*ring));
473 n_on_ring = ring->tx_head - ring->tx_tail;
474 from = vlib_frame_vector_args (f);
476 ASSERT(n_packets <= VLIB_FRAME_SIZE);
478 if (PREDICT_FALSE(n_on_ring + n_packets > DPDK_TX_RING_SIZE))
481 * Overflowing the ring should never happen.
482 * If it does then drop the whole frame.
484 vlib_error_count (vm, node->node_index, DPDK_TX_FUNC_ERROR_RING_FULL,
489 u32 bi0 = from[n_packets];
490 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
491 struct rte_mbuf *mb0 = ((struct rte_mbuf *)b0) - 1;
492 rte_pktmbuf_free (mb0);
497 if (PREDICT_FALSE(dm->tx_pcap_enable))
503 vlib_buffer_t * b0 = vlib_get_buffer (vm, bi0);
504 if (dm->pcap_sw_if_index == 0 ||
505 dm->pcap_sw_if_index == vnet_buffer(b0)->sw_if_index [VLIB_TX])
506 pcap_add_buffer (&dm->pcap_main, vm, bi0, 512);
512 from = vlib_frame_vector_args (f);
514 i = ring->tx_head % DPDK_TX_RING_SIZE;
520 struct rte_mbuf * mb0, * mb1;
521 struct rte_mbuf * prefmb0, * prefmb1;
522 vlib_buffer_t * b0, * b1;
523 vlib_buffer_t * pref0, * pref1;
525 u16 new_data_len0, new_data_len1;
526 u16 new_pkt_len0, new_pkt_len1;
531 pref0 = vlib_get_buffer (vm, pi0);
532 pref1 = vlib_get_buffer (vm, pi1);
534 prefmb0 = ((struct rte_mbuf *)pref0) - 1;
535 prefmb1 = ((struct rte_mbuf *)pref1) - 1;
537 CLIB_PREFETCH(prefmb0, CLIB_CACHE_LINE_BYTES, LOAD);
538 CLIB_PREFETCH(pref0, CLIB_CACHE_LINE_BYTES, LOAD);
539 CLIB_PREFETCH(prefmb1, CLIB_CACHE_LINE_BYTES, LOAD);
540 CLIB_PREFETCH(pref1, CLIB_CACHE_LINE_BYTES, LOAD);
546 b0 = vlib_get_buffer (vm, bi0);
547 b1 = vlib_get_buffer (vm, bi1);
549 mb0 = ((struct rte_mbuf *)b0) - 1;
550 mb1 = ((struct rte_mbuf *)b1) - 1;
552 any_clone = b0->clone_count | b1->clone_count;
553 if (PREDICT_FALSE(any_clone != 0))
555 if (PREDICT_FALSE(b0->clone_count != 0))
557 struct rte_mbuf * mb0_new = dpdk_replicate_packet_mb (b0);
558 if (PREDICT_FALSE(mb0_new == 0))
560 vlib_error_count (vm, node->node_index,
561 DPDK_TX_FUNC_ERROR_REPL_FAIL, 1);
562 b0->flags |= VLIB_BUFFER_REPL_FAIL;
566 vec_add1 (dm->recycle[my_cpu], bi0);
568 if (PREDICT_FALSE(b1->clone_count != 0))
570 struct rte_mbuf * mb1_new = dpdk_replicate_packet_mb (b1);
571 if (PREDICT_FALSE(mb1_new == 0))
573 vlib_error_count (vm, node->node_index,
574 DPDK_TX_FUNC_ERROR_REPL_FAIL, 1);
575 b1->flags |= VLIB_BUFFER_REPL_FAIL;
579 vec_add1 (dm->recycle[my_cpu], bi1);
583 delta0 = PREDICT_FALSE(b0->flags & VLIB_BUFFER_REPL_FAIL) ? 0 :
584 vlib_buffer_length_in_chain (vm, b0) - (i16) mb0->pkt_len;
585 delta1 = PREDICT_FALSE(b1->flags & VLIB_BUFFER_REPL_FAIL) ? 0 :
586 vlib_buffer_length_in_chain (vm, b1) - (i16) mb1->pkt_len;
588 new_data_len0 = (u16)((i16) mb0->data_len + delta0);
589 new_data_len1 = (u16)((i16) mb1->data_len + delta1);
590 new_pkt_len0 = (u16)((i16) mb0->pkt_len + delta0);
591 new_pkt_len1 = (u16)((i16) mb1->pkt_len + delta1);
593 b0->current_length = new_data_len0;
594 b1->current_length = new_data_len1;
595 mb0->data_len = new_data_len0;
596 mb1->data_len = new_data_len1;
597 mb0->pkt_len = new_pkt_len0;
598 mb1->pkt_len = new_pkt_len1;
600 mb0->data_off = (PREDICT_FALSE(b0->flags & VLIB_BUFFER_REPL_FAIL)) ?
601 mb0->data_off : (u16)(RTE_PKTMBUF_HEADROOM + b0->current_data);
602 mb1->data_off = (PREDICT_FALSE(b1->flags & VLIB_BUFFER_REPL_FAIL)) ?
603 mb1->data_off : (u16)(RTE_PKTMBUF_HEADROOM + b1->current_data);
605 if (PREDICT_FALSE(node->flags & VLIB_NODE_FLAG_TRACE))
607 if (b0->flags & VLIB_BUFFER_IS_TRACED)
608 dpdk_tx_trace_buffer (dm, node, xd, queue_id, bi0, b0);
609 if (b1->flags & VLIB_BUFFER_IS_TRACED)
610 dpdk_tx_trace_buffer (dm, node, xd, queue_id, bi1, b1);
613 if (PREDICT_TRUE(any_clone == 0))
615 tx_vector[i % DPDK_TX_RING_SIZE] = mb0;
617 tx_vector[i % DPDK_TX_RING_SIZE] = mb1;
622 /* cloning was done, need to check for failure */
623 if (PREDICT_TRUE((b0->flags & VLIB_BUFFER_REPL_FAIL) == 0))
625 tx_vector[i % DPDK_TX_RING_SIZE] = mb0;
628 if (PREDICT_TRUE((b1->flags & VLIB_BUFFER_REPL_FAIL) == 0))
630 tx_vector[i % DPDK_TX_RING_SIZE] = mb1;
640 struct rte_mbuf * mb0;
649 b0 = vlib_get_buffer (vm, bi0);
651 mb0 = ((struct rte_mbuf *)b0) - 1;
652 if (PREDICT_FALSE(b0->clone_count != 0))
654 struct rte_mbuf * mb0_new = dpdk_replicate_packet_mb (b0);
655 if (PREDICT_FALSE(mb0_new == 0))
657 vlib_error_count (vm, node->node_index,
658 DPDK_TX_FUNC_ERROR_REPL_FAIL, 1);
659 b0->flags |= VLIB_BUFFER_REPL_FAIL;
663 vec_add1 (dm->recycle[my_cpu], bi0);
666 delta0 = PREDICT_FALSE(b0->flags & VLIB_BUFFER_REPL_FAIL) ? 0 :
667 vlib_buffer_length_in_chain (vm, b0) - (i16) mb0->pkt_len;
669 new_data_len0 = (u16)((i16) mb0->data_len + delta0);
670 new_pkt_len0 = (u16)((i16) mb0->pkt_len + delta0);
672 b0->current_length = new_data_len0;
673 mb0->data_len = new_data_len0;
674 mb0->pkt_len = new_pkt_len0;
675 mb0->data_off = (PREDICT_FALSE(b0->flags & VLIB_BUFFER_REPL_FAIL)) ?
676 mb0->data_off : (u16)(RTE_PKTMBUF_HEADROOM + b0->current_data);
678 if (PREDICT_FALSE(node->flags & VLIB_NODE_FLAG_TRACE))
679 if (b0->flags & VLIB_BUFFER_IS_TRACED)
680 dpdk_tx_trace_buffer (dm, node, xd, queue_id, bi0, b0);
682 if (PREDICT_TRUE((b0->flags & VLIB_BUFFER_REPL_FAIL) == 0))
684 tx_vector[i % DPDK_TX_RING_SIZE] = mb0;
690 /* account for additional packets in the ring */
691 ring->tx_head += n_packets;
692 n_on_ring = ring->tx_head - ring->tx_tail;
694 /* transmit as many packets as possible */
695 n_packets = tx_burst_vector_internal (vm, xd, tx_vector);
698 * tx_pkts is the number of packets successfully transmitted
699 * This is the number originally on ring minus the number remaining on ring
701 tx_pkts = n_on_ring - n_packets;
703 if (PREDICT_FALSE(dm->flowcontrol_callback != 0))
705 if (PREDICT_FALSE(n_packets))
707 /* Callback may want to enable flowcontrol */
708 dm->flowcontrol_callback(vm, xd->vlib_hw_if_index, ring->tx_head - ring->tx_tail);
712 /* Reset head/tail to avoid unnecessary wrap */
719 /* If there is no callback then drop any non-transmitted packets */
720 if (PREDICT_FALSE(n_packets))
722 vlib_simple_counter_main_t * cm;
723 vnet_main_t * vnm = vnet_get_main();
725 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
726 VNET_INTERFACE_COUNTER_TX_ERROR);
728 vlib_increment_simple_counter (cm, my_cpu, xd->vlib_sw_if_index, n_packets);
730 vlib_error_count (vm, node->node_index, DPDK_TX_FUNC_ERROR_PKT_DROP,
734 rte_pktmbuf_free (tx_vector[ring->tx_tail + n_packets]);
737 /* Reset head/tail to avoid unnecessary wrap */
742 /* Recycle replicated buffers */
743 if (PREDICT_FALSE(vec_len(dm->recycle[my_cpu])))
745 vlib_buffer_free (vm, dm->recycle[my_cpu], vec_len(dm->recycle[my_cpu]));
746 _vec_len(dm->recycle[my_cpu]) = 0;
749 ASSERT(ring->tx_head >= ring->tx_tail);
754 static int dpdk_device_renumber (vnet_hw_interface_t * hi,
755 u32 new_dev_instance)
757 dpdk_main_t * dm = &dpdk_main;
758 dpdk_device_t * xd = vec_elt_at_index (dm->devices, hi->dev_instance);
760 if (!xd || xd->dev_type != VNET_DPDK_DEV_VHOST_USER) {
761 clib_warning("cannot renumber non-vhost-user interface (sw_if_index: %d)",
766 xd->vu_if_id = new_dev_instance;
770 static void dpdk_clear_hw_interface_counters (u32 instance)
772 dpdk_main_t * dm = &dpdk_main;
773 dpdk_device_t * xd = vec_elt_at_index (dm->devices, instance);
776 * DAW-FIXME: VMXNET3 device stop/start doesn't work,
777 * therefore fake the stop in the dpdk driver by
778 * silently dropping all of the incoming pkts instead of
779 * stopping the driver / hardware.
781 if (xd->admin_up != 0xff)
783 rte_eth_stats_reset (xd->device_index);
784 memset (&xd->last_stats, 0, sizeof (xd->last_stats));
785 dpdk_update_counters (xd, vlib_time_now (dm->vlib_main));
789 rte_eth_stats_reset (xd->device_index);
790 memset(&xd->stats, 0, sizeof(xd->stats));
791 memset (&xd->last_stats, 0, sizeof (xd->last_stats));
793 rte_eth_xstats_reset(xd->device_index);
796 #ifdef RTE_LIBRTE_KNI
798 kni_config_network_if(u8 port_id, u8 if_up)
800 vnet_main_t * vnm = vnet_get_main();
801 dpdk_main_t * dm = &dpdk_main;
805 p = hash_get (dm->dpdk_device_by_kni_port_id, port_id);
807 clib_warning("unknown interface");
810 xd = vec_elt_at_index (dm->devices, p[0]);
813 vnet_hw_interface_set_flags (vnm, xd->vlib_hw_if_index,
814 if_up ? VNET_HW_INTERFACE_FLAG_LINK_UP |
815 ETH_LINK_FULL_DUPLEX : 0);
820 kni_change_mtu(u8 port_id, unsigned new_mtu)
822 vnet_main_t * vnm = vnet_get_main();
823 dpdk_main_t * dm = &dpdk_main;
826 vnet_hw_interface_t * hif;
828 p = hash_get (dm->dpdk_device_by_kni_port_id, port_id);
830 clib_warning("unknown interface");
833 xd = vec_elt_at_index (dm->devices, p[0]);
835 hif = vnet_get_hw_interface (vnm, xd->vlib_hw_if_index);
837 hif->max_packet_bytes = new_mtu;
843 static clib_error_t *
844 dpdk_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
846 vnet_hw_interface_t * hif = vnet_get_hw_interface (vnm, hw_if_index);
847 uword is_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
848 dpdk_main_t * dm = &dpdk_main;
849 dpdk_device_t * xd = vec_elt_at_index (dm->devices, hif->dev_instance);
852 #ifdef RTE_LIBRTE_KNI
853 if (xd->dev_type == VNET_DPDK_DEV_KNI)
857 struct rte_kni_conf conf;
858 struct rte_kni_ops ops;
859 vlib_main_t * vm = vlib_get_main();
860 vlib_buffer_main_t * bm = vm->buffer_main;
861 memset(&conf, 0, sizeof(conf));
862 snprintf(conf.name, RTE_KNI_NAMESIZE, "vpp%u", xd->kni_port_id);
863 conf.mbuf_size = MBUF_SIZE;
864 memset(&ops, 0, sizeof(ops));
865 ops.port_id = xd->kni_port_id;
866 ops.change_mtu = kni_change_mtu;
867 ops.config_network_if = kni_config_network_if;
869 xd->kni = rte_kni_alloc(bm->pktmbuf_pools[rte_socket_id()], &conf, &ops);
872 clib_warning("failed to allocate kni interface");
876 hif->max_packet_bytes = 1500; /* kni interface default value */
883 rte_kni_release(xd->kni);
888 if (xd->dev_type == VNET_DPDK_DEV_VHOST_USER)
892 if (xd->vu_is_running)
893 vnet_hw_interface_set_flags (vnm, xd->vlib_hw_if_index,
894 VNET_HW_INTERFACE_FLAG_LINK_UP |
895 ETH_LINK_FULL_DUPLEX );
900 vnet_hw_interface_set_flags (vnm, xd->vlib_hw_if_index, 0);
910 f64 now = vlib_time_now (dm->vlib_main);
913 * DAW-FIXME: VMXNET3 device stop/start doesn't work,
914 * therefore fake the stop in the dpdk driver by
915 * silently dropping all of the incoming pkts instead of
916 * stopping the driver / hardware.
918 if (xd->admin_up == 0)
919 rv = rte_eth_dev_start (xd->device_index);
922 rte_eth_promiscuous_enable(xd->device_index);
924 rte_eth_promiscuous_disable(xd->device_index);
926 rte_eth_allmulticast_enable (xd->device_index);
928 dpdk_update_counters (xd, now);
929 dpdk_update_link_state (xd, now);
934 * DAW-FIXME: VMXNET3 device stop/start doesn't work,
935 * therefore fake the stop in the dpdk driver by
936 * silently dropping all of the incoming pkts instead of
937 * stopping the driver / hardware.
939 if (xd->pmd != VNET_DPDK_PMD_VMXNET3)
944 rte_eth_allmulticast_disable (xd->device_index);
945 vnet_hw_interface_set_flags (vnm, xd->vlib_hw_if_index, 0);
948 * DAW-FIXME: VMXNET3 device stop/start doesn't work,
949 * therefore fake the stop in the dpdk driver by
950 * silently dropping all of the incoming pkts instead of
951 * stopping the driver / hardware.
953 if (xd->pmd != VNET_DPDK_PMD_VMXNET3)
954 rte_eth_dev_stop (xd->device_index);
958 clib_warning ("rte_eth_dev_%s error: %d", is_up ? "start" : "stop",
961 return /* no error */ 0;
965 * Dynamically redirect all pkts from a specific interface
966 * to the specified node
968 static void dpdk_set_interface_next_node (vnet_main_t *vnm, u32 hw_if_index,
971 dpdk_main_t * xm = &dpdk_main;
972 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
973 dpdk_device_t * xd = vec_elt_at_index (xm->devices, hw->dev_instance);
975 /* Shut off redirection */
976 if (node_index == ~0)
978 xd->per_interface_next_index = node_index;
982 xd->per_interface_next_index =
983 vlib_node_add_next (xm->vlib_main, dpdk_input_node.index, node_index);
987 static clib_error_t *
988 dpdk_subif_add_del_function (vnet_main_t * vnm,
990 struct vnet_sw_interface_t * st,
993 dpdk_main_t * xm = &dpdk_main;
994 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
995 dpdk_device_t * xd = vec_elt_at_index (xm->devices, hw->dev_instance);
996 vnet_sw_interface_t * t = (vnet_sw_interface_t *) st;
1000 if (xd->dev_type != VNET_DPDK_DEV_ETH)
1002 /* currently we program VLANS only for IXGBE VF */
1003 if (xd->pmd != VNET_DPDK_PMD_IXGBEVF)
1006 if (t->sub.eth.flags.no_tags == 1)
1009 if ((t->sub.eth.flags.one_tag != 1) || (t->sub.eth.flags.exact_match != 1 ))
1010 return clib_error_return (0, "unsupported VLAN setup");
1013 vlan_offload = rte_eth_dev_get_vlan_offload(xd->device_index);
1014 vlan_offload |= ETH_VLAN_FILTER_OFFLOAD;
1016 if ((r = rte_eth_dev_set_vlan_offload(xd->device_index, vlan_offload)))
1017 return clib_error_return (0, "rte_eth_dev_set_vlan_offload[%d]: err %d",
1018 xd->device_index, r);
1021 if ((r = rte_eth_dev_vlan_filter(xd->device_index, t->sub.eth.outer_vlan_id, is_add)))
1022 return clib_error_return (0, "rte_eth_dev_vlan_filter[%d]: err %d",
1023 xd->device_index, r);
1028 VNET_DEVICE_CLASS (dpdk_device_class) = {
1030 .tx_function = dpdk_interface_tx,
1031 .tx_function_n_errors = DPDK_TX_FUNC_N_ERROR,
1032 .tx_function_error_strings = dpdk_tx_func_error_strings,
1033 .format_device_name = format_dpdk_device_name,
1034 .format_device = format_dpdk_device,
1035 .format_tx_trace = format_dpdk_tx_dma_trace,
1036 .clear_counters = dpdk_clear_hw_interface_counters,
1037 .admin_up_down_function = dpdk_interface_admin_up_down,
1038 .subif_add_del_function = dpdk_subif_add_del_function,
1039 .rx_redirect_to_node = dpdk_set_interface_next_node,
1040 .no_flatten_output_chains = 1,
1041 .name_renumber = dpdk_device_renumber,
1044 void dpdk_set_flowcontrol_callback (vlib_main_t *vm,
1045 dpdk_flowcontrol_callback_t callback)
1047 dpdk_main.flowcontrol_callback = callback;
1050 #define UP_DOWN_FLAG_EVENT 1
1053 u32 dpdk_get_admin_up_down_in_progress (void)
1055 return dpdk_main.admin_up_down_in_progress;
1059 admin_up_down_process (vlib_main_t * vm,
1060 vlib_node_runtime_t * rt,
1063 clib_error_t * error = 0;
1065 uword *event_data = 0;
1072 vlib_process_wait_for_event (vm);
1074 event_type = vlib_process_get_events (vm, &event_data);
1076 dpdk_main.admin_up_down_in_progress = 1;
1078 for (index=0; index<vec_len(event_data); index++)
1080 sw_if_index = event_data[index] >> 32;
1081 flags = (u32) event_data[index];
1083 switch (event_type) {
1084 case UP_DOWN_FLAG_EVENT:
1085 error = vnet_sw_interface_set_flags (vnet_get_main(), sw_if_index, flags);
1086 clib_error_report(error);
1091 vec_reset_length (event_data);
1093 dpdk_main.admin_up_down_in_progress = 0;
1096 return 0; /* or not */
1099 VLIB_REGISTER_NODE (admin_up_down_process_node,static) = {
1100 .function = admin_up_down_process,
1101 .type = VLIB_NODE_TYPE_PROCESS,
1102 .name = "admin-up-down-process",
1103 .process_log2_n_stack_bytes = 17, // 256KB
1107 * Asynchronously invoke vnet_sw_interface_set_flags via the admin_up_down
1108 * process. Useful for avoiding long blocking delays (>150ms) in the dpdk
1110 * WARNING: when posting this event, no other interface-related calls should
1111 * be made (e.g. vnet_create_sw_interface()) while the event is being
1112 * processed (admin_up_down_in_progress). This is required in order to avoid
1113 * race conditions in manipulating interface data structures.
1115 void post_sw_interface_set_flags (vlib_main_t *vm, u32 sw_if_index, u32 flags)
1117 vlib_process_signal_event
1118 (vm, admin_up_down_process_node.index,
1120 (((uword)sw_if_index << 32) | flags));
1124 * Called by the dpdk driver's rte_delay_us() function.
1125 * Return 0 to have the dpdk do a regular delay loop.
1126 * Return 1 if to skip the delay loop because we are suspending
1127 * the calling vlib process instead.
1129 int rte_delay_us_override (unsigned us) {
1132 /* Don't bother intercepting for short delays */
1133 if (us < 10) return 0;
1136 * Only intercept if we are in a vlib process.
1137 * If we are called from a vlib worker thread or the vlib main
1138 * thread then do not intercept. (Must not be called from an
1139 * independent pthread).
1141 if (os_get_cpu_number() == 0)
1144 * We're in the vlib main thread or a vlib process. Make sure
1145 * the process is running and we're not still initializing.
1147 vm = vlib_get_main();
1148 if (vlib_in_process_context(vm))
1150 /* Only suspend for the admin_down_process */
1151 vlib_process_t * proc = vlib_get_current_process(vm);
1152 if (!(proc->flags & VLIB_PROCESS_IS_RUNNING) ||
1153 (proc->node_runtime.function != admin_up_down_process))
1156 f64 delay = 1e-6 * us;
1157 vlib_process_suspend(vm, delay);
1161 return 0; // no override