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
47 dpdk_set_mac_address (vnet_hw_interface_t * hi, char * address)
50 dpdk_main_t * dm = &dpdk_main;
51 dpdk_device_t * xd = vec_elt_at_index (dm->devices, hi->dev_instance);
53 error=rte_eth_dev_default_mac_addr_set(xd->device_index,
54 (struct ether_addr *) address);
57 return clib_error_return (0, "mac address set failed: %d", error);
64 dpdk_set_mc_filter (vnet_hw_interface_t * hi,
65 struct ether_addr mc_addr_vec[], int naddr)
68 dpdk_main_t * dm = &dpdk_main;
69 dpdk_device_t * xd = vec_elt_at_index (dm->devices, hi->dev_instance);
71 error=rte_eth_dev_set_mc_addr_list(xd->device_index, mc_addr_vec, naddr);
74 return clib_error_return (0, "mc addr list failed: %d", error);
80 static struct rte_mbuf * dpdk_replicate_packet_mb (vlib_buffer_t * b)
82 vlib_main_t * vm = vlib_get_main();
83 vlib_buffer_main_t * bm = vm->buffer_main;
84 struct rte_mbuf * first_mb = 0, * new_mb, * pkt_mb, ** prev_mb_next = 0;
85 u8 nb_segs, nb_segs_left;
87 unsigned socket_id = rte_socket_id();
89 ASSERT (bm->pktmbuf_pools[socket_id]);
90 pkt_mb = ((struct rte_mbuf *)b)-1;
91 nb_segs = pkt_mb->nb_segs;
92 for (nb_segs_left = nb_segs; nb_segs_left; nb_segs_left--)
94 if (PREDICT_FALSE(pkt_mb == 0))
96 clib_warning ("Missing %d mbuf chain segment(s): "
97 "(nb_segs = %d, nb_segs_left = %d)!",
98 nb_segs - nb_segs_left, nb_segs, nb_segs_left);
100 rte_pktmbuf_free(first_mb);
103 new_mb = rte_pktmbuf_alloc (bm->pktmbuf_pools[socket_id]);
104 if (PREDICT_FALSE(new_mb == 0))
107 rte_pktmbuf_free(first_mb);
112 * Copy packet info into 1st segment.
117 rte_pktmbuf_pkt_len (first_mb) = pkt_mb->pkt_len;
118 first_mb->nb_segs = pkt_mb->nb_segs;
119 first_mb->port = pkt_mb->port;
120 #ifdef DAW_FIXME // TX Offload support TBD
121 first_mb->vlan_macip = pkt_mb->vlan_macip;
122 first_mb->hash = pkt_mb->hash;
123 first_mb->ol_flags = pkt_mb->ol_flags
128 ASSERT(prev_mb_next != 0);
129 *prev_mb_next = new_mb;
133 * Copy packet segment data into new mbuf segment.
135 rte_pktmbuf_data_len (new_mb) = pkt_mb->data_len;
136 copy_bytes = pkt_mb->data_len + RTE_PKTMBUF_HEADROOM;
137 ASSERT(copy_bytes <= pkt_mb->buf_len);
138 memcpy(new_mb->buf_addr, pkt_mb->buf_addr, copy_bytes);
140 prev_mb_next = &new_mb->next;
141 pkt_mb = pkt_mb->next;
145 __rte_mbuf_sanity_check(first_mb, 1);
151 dpdk_tx_trace_buffer (dpdk_main_t * dm,
152 vlib_node_runtime_t * node,
156 vlib_buffer_t * buffer)
158 vlib_main_t * vm = vlib_get_main();
159 dpdk_tx_dma_trace_t * t0;
160 struct rte_mbuf * mb;
162 mb = ((struct rte_mbuf *)buffer)-1;
164 t0 = vlib_add_trace (vm, node, buffer, sizeof (t0[0]));
165 t0->queue_index = queue_id;
166 t0->device_index = xd->device_index;
167 t0->buffer_index = buffer_index;
168 memcpy (&t0->mb, mb, sizeof (t0->mb));
169 memcpy (&t0->buffer, buffer, sizeof (buffer[0]) - sizeof (buffer->pre_data));
170 memcpy (t0->buffer.pre_data, buffer->data + buffer->current_data,
171 sizeof (t0->buffer.pre_data));
175 * This function calls the dpdk's tx_burst function to transmit the packets
176 * on the tx_vector. It manages a lock per-device if the device does not
177 * support multiple queues. It returns the number of packets untransmitted
178 * on the tx_vector. If all packets are transmitted (the normal case), the
179 * function returns 0.
181 * The tx_burst function may not be able to transmit all packets because the
182 * dpdk ring is full. If a flowcontrol callback function has been configured
183 * then the function simply returns. If no callback has been configured, the
184 * function will retry calling tx_burst with the remaining packets. This will
185 * continue until all packets are transmitted or tx_burst indicates no packets
186 * could be transmitted. (The caller can drop the remaining packets.)
188 * The function assumes there is at least one packet on the tx_vector.
191 u32 tx_burst_vector_internal (vlib_main_t * vm,
193 struct rte_mbuf ** tx_vector)
195 dpdk_main_t * dm = &dpdk_main;
204 ring = vec_header(tx_vector, sizeof(*ring));
206 n_packets = ring->tx_head - ring->tx_tail;
208 tx_head = ring->tx_head % DPDK_TX_RING_SIZE;
211 * Ensure rte_eth_tx_burst is not called with 0 packets, which can lead to
212 * unpredictable results.
214 ASSERT(n_packets > 0);
217 * Check for tx_vector overflow. If this fails it is a system configuration
218 * error. The ring should be sized big enough to handle the largest un-flowed
219 * off burst from a traffic manager. A larger size also helps performance
220 * a bit because it decreases the probability of having to issue two tx_burst
221 * calls due to a ring wrap.
223 ASSERT(n_packets < DPDK_TX_RING_SIZE);
226 * If there is no flowcontrol callback, there is only temporary buffering
227 * on the tx_vector and so the tail should always be 0.
229 ASSERT(dm->flowcontrol_callback || ring->tx_tail == 0);
232 * If there is a flowcontrol callback, don't retry any incomplete tx_bursts.
233 * Apply backpressure instead. If there is no callback, keep retrying until
234 * a tx_burst sends no packets. n_retry of 255 essentially means no retry
237 n_retry = dm->flowcontrol_callback ? 0 : 255;
239 queue_id = vm->cpu_index;
242 /* start the burst at the tail */
243 tx_tail = ring->tx_tail % DPDK_TX_RING_SIZE;
246 * This device only supports one TX queue,
247 * and we're running multi-threaded...
249 if (PREDICT_FALSE(xd->dev_type != VNET_DPDK_DEV_VHOST_USER &&
252 queue_id = queue_id % xd->tx_q_used;
253 while (__sync_lock_test_and_set (xd->lockp[queue_id], 1))
255 queue_id = (queue_id + 1) % xd->tx_q_used;
258 if (PREDICT_TRUE(xd->dev_type == VNET_DPDK_DEV_ETH))
260 if (PREDICT_TRUE(tx_head > tx_tail))
262 /* no wrap, transmit in one burst */
263 rv = rte_eth_tx_burst(xd->device_index,
266 (uint16_t) (tx_head-tx_tail));
271 * This can only happen if there is a flowcontrol callback.
272 * We need to split the transmit into two calls: one for
273 * the packets up to the wrap point, and one to continue
274 * at the start of the ring.
275 * Transmit pkts up to the wrap point.
277 rv = rte_eth_tx_burst(xd->device_index,
280 (uint16_t) (DPDK_TX_RING_SIZE - tx_tail));
283 * If we transmitted everything we wanted, then allow 1 retry
284 * so we can try to transmit the rest. If we didn't transmit
285 * everything, stop now.
287 n_retry = (rv == DPDK_TX_RING_SIZE - tx_tail) ? 1 : 0;
290 else if (xd->dev_type == VNET_DPDK_DEV_VHOST_USER)
293 if (xd->need_txlock) {
295 while (__sync_lock_test_and_set (xd->lockp[queue_id], 1));
297 #if RTE_VERSION >= RTE_VERSION_NUM(2, 2, 0, 0)
299 dpdk_device_and_queue_t * dq;
300 vec_foreach (dq, dm->devices_by_cpu[vm->cpu_index])
302 if (xd->device_index == dq->device)
306 offset = dq->queue_id * VIRTIO_QNUM;
309 if (PREDICT_TRUE(tx_head > tx_tail))
311 /* no wrap, transmit in one burst */
312 rv = rte_vhost_enqueue_burst(&xd->vu_vhost_dev, offset + VIRTIO_RXQ,
314 (uint16_t) (tx_head-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]);
335 * If we transmitted everything we wanted, then allow 1 retry
336 * so we can try to transmit the rest. If we didn't transmit
337 * everything, stop now.
339 rv = rte_vhost_enqueue_burst(&xd->vu_vhost_dev, offset + VIRTIO_RXQ,
341 (uint16_t) (DPDK_TX_RING_SIZE - tx_tail));
343 if (PREDICT_TRUE(rv > 0))
345 if (dpdk_vhost_user_want_interrupt(xd, offset + VIRTIO_RXQ)) {
346 dpdk_vu_vring *vring = &(xd->vu_intf->vrings[offset + VIRTIO_RXQ]);
347 vring->n_since_last_int += rv;
349 f64 now = vlib_time_now (vm);
350 if (vring->int_deadline < now ||
351 vring->n_since_last_int > dm->vhost_coalesce_frames)
352 dpdk_vhost_user_send_interrupt(vm, xd, offset + VIRTIO_RXQ);
357 rte_pktmbuf_free (tx_vector[tx_tail+c]);
360 n_retry = (rv == DPDK_TX_RING_SIZE - tx_tail) ? 1 : 0;
364 *xd->lockp[queue_id] = 0;
367 else if (xd->dev_type == VNET_DPDK_DEV_KNI)
369 if (PREDICT_TRUE(tx_head > tx_tail))
371 /* no wrap, transmit in one burst */
372 rv = rte_kni_tx_burst(xd->kni,
374 (uint16_t) (tx_head-tx_tail));
379 * This can only happen if there is a flowcontrol callback.
380 * We need to split the transmit into two calls: one for
381 * the packets up to the wrap point, and one to continue
382 * at the start of the ring.
383 * Transmit pkts up to the wrap point.
385 rv = rte_kni_tx_burst(xd->kni,
387 (uint16_t) (DPDK_TX_RING_SIZE - tx_tail));
390 * If we transmitted everything we wanted, then allow 1 retry
391 * so we can try to transmit the rest. If we didn't transmit
392 * everything, stop now.
394 n_retry = (rv == DPDK_TX_RING_SIZE - tx_tail) ? 1 : 0;
404 if (PREDICT_FALSE(xd->dev_type != VNET_DPDK_DEV_VHOST_USER &&
406 *xd->lockp[queue_id] = 0;
408 if (PREDICT_FALSE(rv < 0))
410 // emit non-fatal message, bump counter
411 vnet_main_t * vnm = dm->vnet_main;
412 vnet_interface_main_t * im = &vnm->interface_main;
415 node_index = vec_elt_at_index(im->hw_interfaces,
416 xd->vlib_hw_if_index)->tx_node_index;
418 vlib_error_count (vm, node_index, DPDK_TX_FUNC_ERROR_BAD_RETVAL, 1);
419 clib_warning ("rte_eth_tx_burst[%d]: error %d", xd->device_index, rv);
420 return n_packets; // untransmitted packets
422 ring->tx_tail += (u16)rv;
423 n_packets -= (uint16_t) rv;
424 } while (rv && n_packets && (n_retry>0));
431 * This function transmits any packets on the interface's tx_vector and returns
432 * the number of packets untransmitted on the tx_vector. If the tx_vector is
433 * empty the function simply returns 0.
435 * It is intended to be called by a traffic manager which has flowed-off an
436 * interface to see if the interface can be flowed-on again.
438 u32 dpdk_interface_tx_vector (vlib_main_t * vm, u32 dev_instance)
440 dpdk_main_t * dm = &dpdk_main;
443 struct rte_mbuf ** tx_vector;
446 /* param is dev_instance and not hw_if_index to save another lookup */
447 xd = vec_elt_at_index (dm->devices, dev_instance);
449 queue_id = vm->cpu_index;
450 tx_vector = xd->tx_vectors[queue_id];
452 /* If no packets on the ring, don't bother calling tx function */
453 ring = vec_header(tx_vector, sizeof(*ring));
454 if (ring->tx_head == ring->tx_tail)
459 return tx_burst_vector_internal (vm, xd, tx_vector);
463 * Transmits the packets on the frame to the interface associated with the
464 * node. It first copies packets on the frame to a tx_vector containing the
465 * rte_mbuf pointers. It then passes this vector to tx_burst_vector_internal
466 * which calls the dpdk tx_burst function.
468 * The tx_vector is treated slightly differently depending on whether or
469 * not a flowcontrol callback function has been configured. If there is no
470 * callback, the tx_vector is a temporary array of rte_mbuf packet pointers.
471 * Its entries are written and consumed before the function exits.
473 * If there is a callback then the transmit is being invoked in the presence
474 * of a traffic manager. Here the tx_vector is treated like a ring of rte_mbuf
475 * pointers. If not all packets can be transmitted, the untransmitted packets
476 * stay on the tx_vector until the next call. The callback allows the traffic
477 * manager to flow-off dequeues to the interface. The companion function
478 * dpdk_interface_tx_vector() allows the traffic manager to detect when
479 * it should flow-on the interface again.
482 dpdk_interface_tx (vlib_main_t * vm,
483 vlib_node_runtime_t * node,
486 dpdk_main_t * dm = &dpdk_main;
487 vnet_interface_output_runtime_t * rd = (void *) node->runtime_data;
488 dpdk_device_t * xd = vec_elt_at_index (dm->devices, rd->dev_instance);
489 u32 n_packets = f->n_vectors;
492 struct rte_mbuf ** tx_vector;
500 my_cpu = vm->cpu_index;
504 tx_vector = xd->tx_vectors[queue_id];
505 ring = vec_header(tx_vector, sizeof(*ring));
507 n_on_ring = ring->tx_head - ring->tx_tail;
508 from = vlib_frame_vector_args (f);
510 ASSERT(n_packets <= VLIB_FRAME_SIZE);
512 if (PREDICT_FALSE(n_on_ring + n_packets > DPDK_TX_RING_SIZE))
515 * Overflowing the ring should never happen.
516 * If it does then drop the whole frame.
518 vlib_error_count (vm, node->node_index, DPDK_TX_FUNC_ERROR_RING_FULL,
523 u32 bi0 = from[n_packets];
524 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
525 struct rte_mbuf *mb0 = ((struct rte_mbuf *)b0) - 1;
526 rte_pktmbuf_free (mb0);
531 if (PREDICT_FALSE(dm->tx_pcap_enable))
537 vlib_buffer_t * b0 = vlib_get_buffer (vm, bi0);
538 if (dm->pcap_sw_if_index == 0 ||
539 dm->pcap_sw_if_index == vnet_buffer(b0)->sw_if_index [VLIB_TX])
540 pcap_add_buffer (&dm->pcap_main, vm, bi0, 512);
546 from = vlib_frame_vector_args (f);
548 i = ring->tx_head % DPDK_TX_RING_SIZE;
554 struct rte_mbuf * mb0, * mb1;
555 struct rte_mbuf * prefmb0, * prefmb1;
556 vlib_buffer_t * b0, * b1;
557 vlib_buffer_t * pref0, * pref1;
559 u16 new_data_len0, new_data_len1;
560 u16 new_pkt_len0, new_pkt_len1;
565 pref0 = vlib_get_buffer (vm, pi0);
566 pref1 = vlib_get_buffer (vm, pi1);
568 prefmb0 = ((struct rte_mbuf *)pref0) - 1;
569 prefmb1 = ((struct rte_mbuf *)pref1) - 1;
571 CLIB_PREFETCH(prefmb0, CLIB_CACHE_LINE_BYTES, LOAD);
572 CLIB_PREFETCH(pref0, CLIB_CACHE_LINE_BYTES, LOAD);
573 CLIB_PREFETCH(prefmb1, CLIB_CACHE_LINE_BYTES, LOAD);
574 CLIB_PREFETCH(pref1, CLIB_CACHE_LINE_BYTES, LOAD);
580 b0 = vlib_get_buffer (vm, bi0);
581 b1 = vlib_get_buffer (vm, bi1);
583 mb0 = ((struct rte_mbuf *)b0) - 1;
584 mb1 = ((struct rte_mbuf *)b1) - 1;
586 any_clone = b0->clone_count | b1->clone_count;
587 if (PREDICT_FALSE(any_clone != 0))
589 if (PREDICT_FALSE(b0->clone_count != 0))
591 struct rte_mbuf * mb0_new = dpdk_replicate_packet_mb (b0);
592 if (PREDICT_FALSE(mb0_new == 0))
594 vlib_error_count (vm, node->node_index,
595 DPDK_TX_FUNC_ERROR_REPL_FAIL, 1);
596 b0->flags |= VLIB_BUFFER_REPL_FAIL;
600 vec_add1 (dm->recycle[my_cpu], bi0);
602 if (PREDICT_FALSE(b1->clone_count != 0))
604 struct rte_mbuf * mb1_new = dpdk_replicate_packet_mb (b1);
605 if (PREDICT_FALSE(mb1_new == 0))
607 vlib_error_count (vm, node->node_index,
608 DPDK_TX_FUNC_ERROR_REPL_FAIL, 1);
609 b1->flags |= VLIB_BUFFER_REPL_FAIL;
613 vec_add1 (dm->recycle[my_cpu], bi1);
617 delta0 = PREDICT_FALSE(b0->flags & VLIB_BUFFER_REPL_FAIL) ? 0 :
618 vlib_buffer_length_in_chain (vm, b0) - (i16) mb0->pkt_len;
619 delta1 = PREDICT_FALSE(b1->flags & VLIB_BUFFER_REPL_FAIL) ? 0 :
620 vlib_buffer_length_in_chain (vm, b1) - (i16) mb1->pkt_len;
622 new_data_len0 = (u16)((i16) mb0->data_len + delta0);
623 new_data_len1 = (u16)((i16) mb1->data_len + delta1);
624 new_pkt_len0 = (u16)((i16) mb0->pkt_len + delta0);
625 new_pkt_len1 = (u16)((i16) mb1->pkt_len + delta1);
627 b0->current_length = new_data_len0;
628 b1->current_length = new_data_len1;
629 mb0->data_len = new_data_len0;
630 mb1->data_len = new_data_len1;
631 mb0->pkt_len = new_pkt_len0;
632 mb1->pkt_len = new_pkt_len1;
634 mb0->data_off = (PREDICT_FALSE(b0->flags & VLIB_BUFFER_REPL_FAIL)) ?
635 mb0->data_off : (u16)(RTE_PKTMBUF_HEADROOM + b0->current_data);
636 mb1->data_off = (PREDICT_FALSE(b1->flags & VLIB_BUFFER_REPL_FAIL)) ?
637 mb1->data_off : (u16)(RTE_PKTMBUF_HEADROOM + b1->current_data);
639 if (PREDICT_FALSE(node->flags & VLIB_NODE_FLAG_TRACE))
641 if (b0->flags & VLIB_BUFFER_IS_TRACED)
642 dpdk_tx_trace_buffer (dm, node, xd, queue_id, bi0, b0);
643 if (b1->flags & VLIB_BUFFER_IS_TRACED)
644 dpdk_tx_trace_buffer (dm, node, xd, queue_id, bi1, b1);
647 if (PREDICT_TRUE(any_clone == 0))
649 tx_vector[i % DPDK_TX_RING_SIZE] = mb0;
651 tx_vector[i % DPDK_TX_RING_SIZE] = mb1;
656 /* cloning was done, need to check for failure */
657 if (PREDICT_TRUE((b0->flags & VLIB_BUFFER_REPL_FAIL) == 0))
659 tx_vector[i % DPDK_TX_RING_SIZE] = mb0;
662 if (PREDICT_TRUE((b1->flags & VLIB_BUFFER_REPL_FAIL) == 0))
664 tx_vector[i % DPDK_TX_RING_SIZE] = mb1;
674 struct rte_mbuf * mb0;
683 b0 = vlib_get_buffer (vm, bi0);
685 mb0 = ((struct rte_mbuf *)b0) - 1;
686 if (PREDICT_FALSE(b0->clone_count != 0))
688 struct rte_mbuf * mb0_new = dpdk_replicate_packet_mb (b0);
689 if (PREDICT_FALSE(mb0_new == 0))
691 vlib_error_count (vm, node->node_index,
692 DPDK_TX_FUNC_ERROR_REPL_FAIL, 1);
693 b0->flags |= VLIB_BUFFER_REPL_FAIL;
697 vec_add1 (dm->recycle[my_cpu], bi0);
700 delta0 = PREDICT_FALSE(b0->flags & VLIB_BUFFER_REPL_FAIL) ? 0 :
701 vlib_buffer_length_in_chain (vm, b0) - (i16) mb0->pkt_len;
703 new_data_len0 = (u16)((i16) mb0->data_len + delta0);
704 new_pkt_len0 = (u16)((i16) mb0->pkt_len + delta0);
706 b0->current_length = new_data_len0;
707 mb0->data_len = new_data_len0;
708 mb0->pkt_len = new_pkt_len0;
709 mb0->data_off = (PREDICT_FALSE(b0->flags & VLIB_BUFFER_REPL_FAIL)) ?
710 mb0->data_off : (u16)(RTE_PKTMBUF_HEADROOM + b0->current_data);
712 if (PREDICT_FALSE(node->flags & VLIB_NODE_FLAG_TRACE))
713 if (b0->flags & VLIB_BUFFER_IS_TRACED)
714 dpdk_tx_trace_buffer (dm, node, xd, queue_id, bi0, b0);
716 if (PREDICT_TRUE((b0->flags & VLIB_BUFFER_REPL_FAIL) == 0))
718 tx_vector[i % DPDK_TX_RING_SIZE] = mb0;
724 /* account for additional packets in the ring */
725 ring->tx_head += n_packets;
726 n_on_ring = ring->tx_head - ring->tx_tail;
728 /* transmit as many packets as possible */
729 n_packets = tx_burst_vector_internal (vm, xd, tx_vector);
732 * tx_pkts is the number of packets successfully transmitted
733 * This is the number originally on ring minus the number remaining on ring
735 tx_pkts = n_on_ring - n_packets;
737 if (PREDICT_FALSE(dm->flowcontrol_callback != 0))
739 if (PREDICT_FALSE(n_packets))
741 /* Callback may want to enable flowcontrol */
742 dm->flowcontrol_callback(vm, xd->vlib_hw_if_index, ring->tx_head - ring->tx_tail);
746 /* Reset head/tail to avoid unnecessary wrap */
753 /* If there is no callback then drop any non-transmitted packets */
754 if (PREDICT_FALSE(n_packets))
756 vlib_simple_counter_main_t * cm;
757 vnet_main_t * vnm = vnet_get_main();
759 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
760 VNET_INTERFACE_COUNTER_TX_ERROR);
762 vlib_increment_simple_counter (cm, my_cpu, xd->vlib_sw_if_index, n_packets);
764 vlib_error_count (vm, node->node_index, DPDK_TX_FUNC_ERROR_PKT_DROP,
768 rte_pktmbuf_free (tx_vector[ring->tx_tail + n_packets]);
771 /* Reset head/tail to avoid unnecessary wrap */
776 /* Recycle replicated buffers */
777 if (PREDICT_FALSE(vec_len(dm->recycle[my_cpu])))
779 vlib_buffer_free (vm, dm->recycle[my_cpu], vec_len(dm->recycle[my_cpu]));
780 _vec_len(dm->recycle[my_cpu]) = 0;
783 ASSERT(ring->tx_head >= ring->tx_tail);
788 static int dpdk_device_renumber (vnet_hw_interface_t * hi,
789 u32 new_dev_instance)
791 dpdk_main_t * dm = &dpdk_main;
792 dpdk_device_t * xd = vec_elt_at_index (dm->devices, hi->dev_instance);
794 if (!xd || xd->dev_type != VNET_DPDK_DEV_VHOST_USER) {
795 clib_warning("cannot renumber non-vhost-user interface (sw_if_index: %d)",
800 xd->vu_if_id = new_dev_instance;
804 static void dpdk_clear_hw_interface_counters (u32 instance)
806 dpdk_main_t * dm = &dpdk_main;
807 dpdk_device_t * xd = vec_elt_at_index (dm->devices, instance);
810 * DAW-FIXME: VMXNET3 device stop/start doesn't work,
811 * therefore fake the stop in the dpdk driver by
812 * silently dropping all of the incoming pkts instead of
813 * stopping the driver / hardware.
815 if (xd->admin_up != 0xff)
817 rte_eth_stats_reset (xd->device_index);
818 memset (&xd->last_stats, 0, sizeof (xd->last_stats));
819 dpdk_update_counters (xd, vlib_time_now (dm->vlib_main));
823 rte_eth_stats_reset (xd->device_index);
824 memset(&xd->stats, 0, sizeof(xd->stats));
825 memset (&xd->last_stats, 0, sizeof (xd->last_stats));
827 rte_eth_xstats_reset(xd->device_index);
830 #ifdef RTE_LIBRTE_KNI
832 kni_config_network_if(u8 port_id, u8 if_up)
834 vnet_main_t * vnm = vnet_get_main();
835 dpdk_main_t * dm = &dpdk_main;
839 p = hash_get (dm->dpdk_device_by_kni_port_id, port_id);
841 clib_warning("unknown interface");
844 xd = vec_elt_at_index (dm->devices, p[0]);
847 vnet_hw_interface_set_flags (vnm, xd->vlib_hw_if_index,
848 if_up ? VNET_HW_INTERFACE_FLAG_LINK_UP |
849 ETH_LINK_FULL_DUPLEX : 0);
854 kni_change_mtu(u8 port_id, unsigned new_mtu)
856 vnet_main_t * vnm = vnet_get_main();
857 dpdk_main_t * dm = &dpdk_main;
860 vnet_hw_interface_t * hif;
862 p = hash_get (dm->dpdk_device_by_kni_port_id, port_id);
864 clib_warning("unknown interface");
867 xd = vec_elt_at_index (dm->devices, p[0]);
869 hif = vnet_get_hw_interface (vnm, xd->vlib_hw_if_index);
871 hif->max_packet_bytes = new_mtu;
877 static clib_error_t *
878 dpdk_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
880 vnet_hw_interface_t * hif = vnet_get_hw_interface (vnm, hw_if_index);
881 uword is_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
882 dpdk_main_t * dm = &dpdk_main;
883 dpdk_device_t * xd = vec_elt_at_index (dm->devices, hif->dev_instance);
886 #ifdef RTE_LIBRTE_KNI
887 if (xd->dev_type == VNET_DPDK_DEV_KNI)
891 struct rte_kni_conf conf;
892 struct rte_kni_ops ops;
893 vlib_main_t * vm = vlib_get_main();
894 vlib_buffer_main_t * bm = vm->buffer_main;
895 memset(&conf, 0, sizeof(conf));
896 snprintf(conf.name, RTE_KNI_NAMESIZE, "vpp%u", xd->kni_port_id);
897 conf.mbuf_size = MBUF_SIZE;
898 memset(&ops, 0, sizeof(ops));
899 ops.port_id = xd->kni_port_id;
900 ops.change_mtu = kni_change_mtu;
901 ops.config_network_if = kni_config_network_if;
903 xd->kni = rte_kni_alloc(bm->pktmbuf_pools[rte_socket_id()], &conf, &ops);
906 clib_warning("failed to allocate kni interface");
910 hif->max_packet_bytes = 1500; /* kni interface default value */
917 rte_kni_release(xd->kni);
922 if (xd->dev_type == VNET_DPDK_DEV_VHOST_USER)
926 if (xd->vu_is_running)
927 vnet_hw_interface_set_flags (vnm, xd->vlib_hw_if_index,
928 VNET_HW_INTERFACE_FLAG_LINK_UP |
929 ETH_LINK_FULL_DUPLEX );
934 vnet_hw_interface_set_flags (vnm, xd->vlib_hw_if_index, 0);
944 f64 now = vlib_time_now (dm->vlib_main);
947 * DAW-FIXME: VMXNET3 device stop/start doesn't work,
948 * therefore fake the stop in the dpdk driver by
949 * silently dropping all of the incoming pkts instead of
950 * stopping the driver / hardware.
952 if (xd->admin_up == 0)
953 rv = rte_eth_dev_start (xd->device_index);
956 rte_eth_promiscuous_enable(xd->device_index);
958 rte_eth_promiscuous_disable(xd->device_index);
960 rte_eth_allmulticast_enable (xd->device_index);
962 dpdk_update_counters (xd, now);
963 dpdk_update_link_state (xd, now);
968 * DAW-FIXME: VMXNET3 device stop/start doesn't work,
969 * therefore fake the stop in the dpdk driver by
970 * silently dropping all of the incoming pkts instead of
971 * stopping the driver / hardware.
973 if (xd->pmd != VNET_DPDK_PMD_VMXNET3)
978 rte_eth_allmulticast_disable (xd->device_index);
979 vnet_hw_interface_set_flags (vnm, xd->vlib_hw_if_index, 0);
982 * DAW-FIXME: VMXNET3 device stop/start doesn't work,
983 * therefore fake the stop in the dpdk driver by
984 * silently dropping all of the incoming pkts instead of
985 * stopping the driver / hardware.
987 if (xd->pmd != VNET_DPDK_PMD_VMXNET3)
988 rte_eth_dev_stop (xd->device_index);
992 clib_warning ("rte_eth_dev_%s error: %d", is_up ? "start" : "stop",
995 return /* no error */ 0;
999 * Dynamically redirect all pkts from a specific interface
1000 * to the specified node
1002 static void dpdk_set_interface_next_node (vnet_main_t *vnm, u32 hw_if_index,
1005 dpdk_main_t * xm = &dpdk_main;
1006 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
1007 dpdk_device_t * xd = vec_elt_at_index (xm->devices, hw->dev_instance);
1009 /* Shut off redirection */
1010 if (node_index == ~0)
1012 xd->per_interface_next_index = node_index;
1016 xd->per_interface_next_index =
1017 vlib_node_add_next (xm->vlib_main, dpdk_input_node.index, node_index);
1021 static clib_error_t *
1022 dpdk_subif_add_del_function (vnet_main_t * vnm,
1024 struct vnet_sw_interface_t * st,
1027 dpdk_main_t * xm = &dpdk_main;
1028 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
1029 dpdk_device_t * xd = vec_elt_at_index (xm->devices, hw->dev_instance);
1030 vnet_sw_interface_t * t = (vnet_sw_interface_t *) st;
1031 int r, vlan_offload;
1034 if (xd->dev_type != VNET_DPDK_DEV_ETH)
1036 /* currently we program VLANS only for IXGBE VF */
1037 if (xd->pmd != VNET_DPDK_PMD_IXGBEVF)
1040 if (t->sub.eth.flags.no_tags == 1)
1043 if ((t->sub.eth.flags.one_tag != 1) || (t->sub.eth.flags.exact_match != 1 ))
1044 return clib_error_return (0, "unsupported VLAN setup");
1047 vlan_offload = rte_eth_dev_get_vlan_offload(xd->device_index);
1048 vlan_offload |= ETH_VLAN_FILTER_OFFLOAD;
1050 if ((r = rte_eth_dev_set_vlan_offload(xd->device_index, vlan_offload)))
1051 return clib_error_return (0, "rte_eth_dev_set_vlan_offload[%d]: err %d",
1052 xd->device_index, r);
1055 if ((r = rte_eth_dev_vlan_filter(xd->device_index, t->sub.eth.outer_vlan_id, is_add)))
1056 return clib_error_return (0, "rte_eth_dev_vlan_filter[%d]: err %d",
1057 xd->device_index, r);
1062 VNET_DEVICE_CLASS (dpdk_device_class) = {
1064 .tx_function = dpdk_interface_tx,
1065 .tx_function_n_errors = DPDK_TX_FUNC_N_ERROR,
1066 .tx_function_error_strings = dpdk_tx_func_error_strings,
1067 .format_device_name = format_dpdk_device_name,
1068 .format_device = format_dpdk_device,
1069 .format_tx_trace = format_dpdk_tx_dma_trace,
1070 .clear_counters = dpdk_clear_hw_interface_counters,
1071 .admin_up_down_function = dpdk_interface_admin_up_down,
1072 .subif_add_del_function = dpdk_subif_add_del_function,
1073 .rx_redirect_to_node = dpdk_set_interface_next_node,
1074 .no_flatten_output_chains = 1,
1075 .name_renumber = dpdk_device_renumber,
1078 void dpdk_set_flowcontrol_callback (vlib_main_t *vm,
1079 dpdk_flowcontrol_callback_t callback)
1081 dpdk_main.flowcontrol_callback = callback;
1084 #define UP_DOWN_FLAG_EVENT 1
1087 u32 dpdk_get_admin_up_down_in_progress (void)
1089 return dpdk_main.admin_up_down_in_progress;
1093 admin_up_down_process (vlib_main_t * vm,
1094 vlib_node_runtime_t * rt,
1097 clib_error_t * error = 0;
1099 uword *event_data = 0;
1106 vlib_process_wait_for_event (vm);
1108 event_type = vlib_process_get_events (vm, &event_data);
1110 dpdk_main.admin_up_down_in_progress = 1;
1112 for (index=0; index<vec_len(event_data); index++)
1114 sw_if_index = event_data[index] >> 32;
1115 flags = (u32) event_data[index];
1117 switch (event_type) {
1118 case UP_DOWN_FLAG_EVENT:
1119 error = vnet_sw_interface_set_flags (vnet_get_main(), sw_if_index, flags);
1120 clib_error_report(error);
1125 vec_reset_length (event_data);
1127 dpdk_main.admin_up_down_in_progress = 0;
1130 return 0; /* or not */
1133 VLIB_REGISTER_NODE (admin_up_down_process_node,static) = {
1134 .function = admin_up_down_process,
1135 .type = VLIB_NODE_TYPE_PROCESS,
1136 .name = "admin-up-down-process",
1137 .process_log2_n_stack_bytes = 17, // 256KB
1141 * Asynchronously invoke vnet_sw_interface_set_flags via the admin_up_down
1142 * process. Useful for avoiding long blocking delays (>150ms) in the dpdk
1144 * WARNING: when posting this event, no other interface-related calls should
1145 * be made (e.g. vnet_create_sw_interface()) while the event is being
1146 * processed (admin_up_down_in_progress). This is required in order to avoid
1147 * race conditions in manipulating interface data structures.
1149 void post_sw_interface_set_flags (vlib_main_t *vm, u32 sw_if_index, u32 flags)
1151 vlib_process_signal_event
1152 (vm, admin_up_down_process_node.index,
1154 (((uword)sw_if_index << 32) | flags));
1158 * Called by the dpdk driver's rte_delay_us() function.
1159 * Return 0 to have the dpdk do a regular delay loop.
1160 * Return 1 if to skip the delay loop because we are suspending
1161 * the calling vlib process instead.
1163 int rte_delay_us_override (unsigned us) {
1166 /* Don't bother intercepting for short delays */
1167 if (us < 10) return 0;
1170 * Only intercept if we are in a vlib process.
1171 * If we are called from a vlib worker thread or the vlib main
1172 * thread then do not intercept. (Must not be called from an
1173 * independent pthread).
1175 if (os_get_cpu_number() == 0)
1178 * We're in the vlib main thread or a vlib process. Make sure
1179 * the process is running and we're not still initializing.
1181 vm = vlib_get_main();
1182 if (vlib_in_process_context(vm))
1184 /* Only suspend for the admin_down_process */
1185 vlib_process_t * proc = vlib_get_current_process(vm);
1186 if (!(proc->flags & VLIB_PROCESS_IS_RUNNING) ||
1187 (proc->node_runtime.function != admin_up_down_process))
1190 f64 delay = 1e-6 * us;
1191 vlib_process_suspend(vm, delay);
1195 return 0; // no override