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)")
35 #define _(f,s) DPDK_TX_FUNC_ERROR_##f,
36 foreach_dpdk_tx_func_error
39 } dpdk_tx_func_error_t;
41 static char *dpdk_tx_func_error_strings[] = {
43 foreach_dpdk_tx_func_error
48 dpdk_set_mac_address (vnet_hw_interface_t * hi, char *address)
51 dpdk_main_t *dm = &dpdk_main;
52 dpdk_device_t *xd = vec_elt_at_index (dm->devices, hi->dev_instance);
54 error = rte_eth_dev_default_mac_addr_set (xd->device_index,
55 (struct ether_addr *) address);
59 return clib_error_return (0, "mac address set failed: %d", error);
68 dpdk_set_mc_filter (vnet_hw_interface_t * hi,
69 struct ether_addr mc_addr_vec[], int naddr)
72 dpdk_main_t *dm = &dpdk_main;
73 dpdk_device_t *xd = vec_elt_at_index (dm->devices, hi->dev_instance);
75 error = rte_eth_dev_set_mc_addr_list (xd->device_index, mc_addr_vec, naddr);
79 return clib_error_return (0, "mc addr list failed: %d", error);
88 dpdk_replicate_packet_mb (vlib_buffer_t * b)
90 vlib_main_t *vm = vlib_get_main ();
91 vlib_buffer_main_t *bm = vm->buffer_main;
92 struct rte_mbuf *first_mb = 0, *new_mb, *pkt_mb, **prev_mb_next = 0;
93 u8 nb_segs, nb_segs_left;
95 unsigned socket_id = rte_socket_id ();
97 ASSERT (bm->pktmbuf_pools[socket_id]);
98 pkt_mb = rte_mbuf_from_vlib_buffer (b);
99 nb_segs = pkt_mb->nb_segs;
100 for (nb_segs_left = nb_segs; nb_segs_left; nb_segs_left--)
102 if (PREDICT_FALSE (pkt_mb == 0))
104 clib_warning ("Missing %d mbuf chain segment(s): "
105 "(nb_segs = %d, nb_segs_left = %d)!",
106 nb_segs - nb_segs_left, nb_segs, nb_segs_left);
108 rte_pktmbuf_free (first_mb);
111 new_mb = rte_pktmbuf_alloc (bm->pktmbuf_pools[socket_id]);
112 if (PREDICT_FALSE (new_mb == 0))
115 rte_pktmbuf_free (first_mb);
120 * Copy packet info into 1st segment.
125 rte_pktmbuf_pkt_len (first_mb) = pkt_mb->pkt_len;
126 first_mb->nb_segs = pkt_mb->nb_segs;
127 first_mb->port = pkt_mb->port;
128 #ifdef DAW_FIXME // TX Offload support TBD
129 first_mb->vlan_macip = pkt_mb->vlan_macip;
130 first_mb->hash = pkt_mb->hash;
131 first_mb->ol_flags = pkt_mb->ol_flags
136 ASSERT (prev_mb_next != 0);
137 *prev_mb_next = new_mb;
141 * Copy packet segment data into new mbuf segment.
143 rte_pktmbuf_data_len (new_mb) = pkt_mb->data_len;
144 copy_bytes = pkt_mb->data_len + RTE_PKTMBUF_HEADROOM;
145 ASSERT (copy_bytes <= pkt_mb->buf_len);
146 clib_memcpy (new_mb->buf_addr, pkt_mb->buf_addr, copy_bytes);
148 prev_mb_next = &new_mb->next;
149 pkt_mb = pkt_mb->next;
152 ASSERT (pkt_mb == 0);
153 __rte_mbuf_sanity_check (first_mb, 1);
159 dpdk_zerocopy_replicate_packet_mb (vlib_buffer_t * b)
161 vlib_main_t *vm = vlib_get_main ();
162 vlib_buffer_main_t *bm = vm->buffer_main;
163 struct rte_mbuf *first_mb = 0, *new_mb, *pkt_mb, **prev_mb_next = 0;
164 u8 nb_segs, nb_segs_left;
165 unsigned socket_id = rte_socket_id ();
167 ASSERT (bm->pktmbuf_pools[socket_id]);
168 pkt_mb = rte_mbuf_from_vlib_buffer (b);
169 nb_segs = pkt_mb->nb_segs;
170 for (nb_segs_left = nb_segs; nb_segs_left; nb_segs_left--)
172 if (PREDICT_FALSE (pkt_mb == 0))
174 clib_warning ("Missing %d mbuf chain segment(s): "
175 "(nb_segs = %d, nb_segs_left = %d)!",
176 nb_segs - nb_segs_left, nb_segs, nb_segs_left);
178 rte_pktmbuf_free (first_mb);
181 new_mb = rte_pktmbuf_clone (pkt_mb, bm->pktmbuf_pools[socket_id]);
182 if (PREDICT_FALSE (new_mb == 0))
185 rte_pktmbuf_free (first_mb);
190 * Copy packet info into 1st segment.
195 rte_pktmbuf_pkt_len (first_mb) = pkt_mb->pkt_len;
196 first_mb->nb_segs = pkt_mb->nb_segs;
197 first_mb->port = pkt_mb->port;
198 #ifdef DAW_FIXME // TX Offload support TBD
199 first_mb->vlan_macip = pkt_mb->vlan_macip;
200 first_mb->hash = pkt_mb->hash;
201 first_mb->ol_flags = pkt_mb->ol_flags
206 ASSERT (prev_mb_next != 0);
207 *prev_mb_next = new_mb;
211 * Copy packet segment data into new mbuf segment.
213 rte_pktmbuf_data_len (new_mb) = pkt_mb->data_len;
215 prev_mb_next = &new_mb->next;
216 pkt_mb = pkt_mb->next;
219 ASSERT (pkt_mb == 0);
220 __rte_mbuf_sanity_check (first_mb, 1);
228 dpdk_tx_trace_buffer (dpdk_main_t * dm,
229 vlib_node_runtime_t * node,
231 u16 queue_id, u32 buffer_index, vlib_buffer_t * buffer)
233 vlib_main_t *vm = vlib_get_main ();
234 dpdk_tx_dma_trace_t *t0;
237 mb = rte_mbuf_from_vlib_buffer (buffer);
239 t0 = vlib_add_trace (vm, node, buffer, sizeof (t0[0]));
240 t0->queue_index = queue_id;
241 t0->device_index = xd->device_index;
242 t0->buffer_index = buffer_index;
243 clib_memcpy (&t0->mb, mb, sizeof (t0->mb));
244 clib_memcpy (&t0->buffer, buffer,
245 sizeof (buffer[0]) - sizeof (buffer->pre_data));
246 clib_memcpy (t0->buffer.pre_data, buffer->data + buffer->current_data,
247 sizeof (t0->buffer.pre_data));
251 * This function calls the dpdk's tx_burst function to transmit the packets
252 * on the tx_vector. It manages a lock per-device if the device does not
253 * support multiple queues. It returns the number of packets untransmitted
254 * on the tx_vector. If all packets are transmitted (the normal case), the
255 * function returns 0.
257 * The tx_burst function may not be able to transmit all packets because the
258 * dpdk ring is full. If a flowcontrol callback function has been configured
259 * then the function simply returns. If no callback has been configured, the
260 * function will retry calling tx_burst with the remaining packets. This will
261 * continue until all packets are transmitted or tx_burst indicates no packets
262 * could be transmitted. (The caller can drop the remaining packets.)
264 * The function assumes there is at least one packet on the tx_vector.
267 u32 tx_burst_vector_internal (vlib_main_t * vm,
269 struct rte_mbuf **tx_vector)
271 dpdk_main_t *dm = &dpdk_main;
280 ring = vec_header (tx_vector, sizeof (*ring));
282 n_packets = ring->tx_head - ring->tx_tail;
284 tx_head = ring->tx_head % xd->nb_tx_desc;
287 * Ensure rte_eth_tx_burst is not called with 0 packets, which can lead to
288 * unpredictable results.
290 ASSERT (n_packets > 0);
293 * Check for tx_vector overflow. If this fails it is a system configuration
294 * error. The ring should be sized big enough to handle the largest un-flowed
295 * off burst from a traffic manager. A larger size also helps performance
296 * a bit because it decreases the probability of having to issue two tx_burst
297 * calls due to a ring wrap.
299 ASSERT (n_packets < xd->nb_tx_desc);
302 * If there is no flowcontrol callback, there is only temporary buffering
303 * on the tx_vector and so the tail should always be 0.
305 ASSERT (dm->flowcontrol_callback || ring->tx_tail == 0);
308 * If there is a flowcontrol callback, don't retry any incomplete tx_bursts.
309 * Apply backpressure instead. If there is no callback, keep retrying until
310 * a tx_burst sends no packets. n_retry of 255 essentially means no retry
313 n_retry = dm->flowcontrol_callback ? 0 : 255;
315 queue_id = vm->cpu_index;
319 /* start the burst at the tail */
320 tx_tail = ring->tx_tail % xd->nb_tx_desc;
323 * This device only supports one TX queue,
324 * and we're running multi-threaded...
326 if (PREDICT_FALSE (xd->lockp != 0))
328 queue_id = queue_id % xd->tx_q_used;
329 while (__sync_lock_test_and_set (xd->lockp[queue_id], 1))
331 queue_id = (queue_id + 1) % xd->tx_q_used;
334 if (PREDICT_TRUE (xd->flags & DPDK_DEVICE_FLAG_HQOS)) /* HQoS ON */
336 if (PREDICT_TRUE (tx_head > tx_tail))
338 /* no wrap, transmit in one burst */
339 dpdk_device_hqos_per_worker_thread_t *hqos =
340 &xd->hqos_wt[vm->cpu_index];
342 dpdk_hqos_metadata_set (hqos,
343 &tx_vector[tx_tail], tx_head - tx_tail);
344 rv = rte_ring_sp_enqueue_burst (hqos->swq,
345 (void **) &tx_vector[tx_tail],
346 (uint16_t) (tx_head - tx_tail));
351 * This can only happen if there is a flowcontrol callback.
352 * We need to split the transmit into two calls: one for
353 * the packets up to the wrap point, and one to continue
354 * at the start of the ring.
355 * Transmit pkts up to the wrap point.
357 dpdk_device_hqos_per_worker_thread_t *hqos =
358 &xd->hqos_wt[vm->cpu_index];
360 dpdk_hqos_metadata_set (hqos,
362 xd->nb_tx_desc - tx_tail);
363 rv = rte_ring_sp_enqueue_burst (hqos->swq,
364 (void **) &tx_vector[tx_tail],
365 (uint16_t) (xd->nb_tx_desc -
368 * If we transmitted everything we wanted, then allow 1 retry
369 * so we can try to transmit the rest. If we didn't transmit
370 * everything, stop now.
372 n_retry = (rv == xd->nb_tx_desc - tx_tail) ? 1 : 0;
375 else if (PREDICT_TRUE (xd->flags & DPDK_DEVICE_FLAG_PMD))
377 if (PREDICT_TRUE (tx_head > tx_tail))
379 /* no wrap, transmit in one burst */
380 rv = rte_eth_tx_burst (xd->device_index,
383 (uint16_t) (tx_head - tx_tail));
388 * This can only happen if there is a flowcontrol callback.
389 * We need to split the transmit into two calls: one for
390 * the packets up to the wrap point, and one to continue
391 * at the start of the ring.
392 * Transmit pkts up to the wrap point.
394 rv = rte_eth_tx_burst (xd->device_index,
397 (uint16_t) (xd->nb_tx_desc - tx_tail));
400 * If we transmitted everything we wanted, then allow 1 retry
401 * so we can try to transmit the rest. If we didn't transmit
402 * everything, stop now.
404 n_retry = (rv == xd->nb_tx_desc - tx_tail) ? 1 : 0;
413 if (PREDICT_FALSE (xd->lockp != 0))
414 *xd->lockp[queue_id] = 0;
416 if (PREDICT_FALSE (rv < 0))
418 // emit non-fatal message, bump counter
419 vnet_main_t *vnm = dm->vnet_main;
420 vnet_interface_main_t *im = &vnm->interface_main;
423 node_index = vec_elt_at_index (im->hw_interfaces,
424 xd->vlib_hw_if_index)->tx_node_index;
426 vlib_error_count (vm, node_index, DPDK_TX_FUNC_ERROR_BAD_RETVAL, 1);
427 clib_warning ("rte_eth_tx_burst[%d]: error %d", xd->device_index,
429 return n_packets; // untransmitted packets
431 ring->tx_tail += (u16) rv;
432 n_packets -= (uint16_t) rv;
434 while (rv && n_packets && (n_retry > 0));
441 * This function transmits any packets on the interface's tx_vector and returns
442 * the number of packets untransmitted on the tx_vector. If the tx_vector is
443 * empty the function simply returns 0.
445 * It is intended to be called by a traffic manager which has flowed-off an
446 * interface to see if the interface can be flowed-on again.
449 dpdk_interface_tx_vector (vlib_main_t * vm, u32 dev_instance)
451 dpdk_main_t *dm = &dpdk_main;
454 struct rte_mbuf **tx_vector;
457 /* param is dev_instance and not hw_if_index to save another lookup */
458 xd = vec_elt_at_index (dm->devices, dev_instance);
460 queue_id = vm->cpu_index;
461 tx_vector = xd->tx_vectors[queue_id];
463 /* If no packets on the ring, don't bother calling tx function */
464 ring = vec_header (tx_vector, sizeof (*ring));
465 if (ring->tx_head == ring->tx_tail)
470 return tx_burst_vector_internal (vm, xd, tx_vector);
474 * Transmits the packets on the frame to the interface associated with the
475 * node. It first copies packets on the frame to a tx_vector containing the
476 * rte_mbuf pointers. It then passes this vector to tx_burst_vector_internal
477 * which calls the dpdk tx_burst function.
479 * The tx_vector is treated slightly differently depending on whether or
480 * not a flowcontrol callback function has been configured. If there is no
481 * callback, the tx_vector is a temporary array of rte_mbuf packet pointers.
482 * Its entries are written and consumed before the function exits.
484 * If there is a callback then the transmit is being invoked in the presence
485 * of a traffic manager. Here the tx_vector is treated like a ring of rte_mbuf
486 * pointers. If not all packets can be transmitted, the untransmitted packets
487 * stay on the tx_vector until the next call. The callback allows the traffic
488 * manager to flow-off dequeues to the interface. The companion function
489 * dpdk_interface_tx_vector() allows the traffic manager to detect when
490 * it should flow-on the interface again.
493 dpdk_interface_tx (vlib_main_t * vm,
494 vlib_node_runtime_t * node, vlib_frame_t * f)
496 dpdk_main_t *dm = &dpdk_main;
497 vnet_interface_output_runtime_t *rd = (void *) node->runtime_data;
498 dpdk_device_t *xd = vec_elt_at_index (dm->devices, rd->dev_instance);
499 u32 n_packets = f->n_vectors;
502 struct rte_mbuf **tx_vector;
510 my_cpu = vm->cpu_index;
514 tx_vector = xd->tx_vectors[queue_id];
515 ring = vec_header (tx_vector, sizeof (*ring));
517 n_on_ring = ring->tx_head - ring->tx_tail;
518 from = vlib_frame_vector_args (f);
520 ASSERT (n_packets <= VLIB_FRAME_SIZE);
522 if (PREDICT_FALSE (n_on_ring + n_packets > xd->nb_tx_desc))
525 * Overflowing the ring should never happen.
526 * If it does then drop the whole frame.
528 vlib_error_count (vm, node->node_index, DPDK_TX_FUNC_ERROR_RING_FULL,
533 u32 bi0 = from[n_packets];
534 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
535 struct rte_mbuf *mb0 = rte_mbuf_from_vlib_buffer (b0);
536 rte_pktmbuf_free (mb0);
541 if (PREDICT_FALSE (dm->tx_pcap_enable))
547 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
548 if (dm->pcap_sw_if_index == 0 ||
549 dm->pcap_sw_if_index == vnet_buffer (b0)->sw_if_index[VLIB_TX])
550 pcap_add_buffer (&dm->pcap_main, vm, bi0, 512);
556 from = vlib_frame_vector_args (f);
558 i = ring->tx_head % xd->nb_tx_desc;
564 struct rte_mbuf *mb0, *mb1;
565 struct rte_mbuf *prefmb0, *prefmb1;
566 vlib_buffer_t *b0, *b1;
567 vlib_buffer_t *pref0, *pref1;
569 u16 new_data_len0, new_data_len1;
570 u16 new_pkt_len0, new_pkt_len1;
575 pref0 = vlib_get_buffer (vm, pi0);
576 pref1 = vlib_get_buffer (vm, pi1);
578 prefmb0 = rte_mbuf_from_vlib_buffer (pref0);
579 prefmb1 = rte_mbuf_from_vlib_buffer (pref1);
581 CLIB_PREFETCH (prefmb0, CLIB_CACHE_LINE_BYTES, LOAD);
582 CLIB_PREFETCH (pref0, CLIB_CACHE_LINE_BYTES, LOAD);
583 CLIB_PREFETCH (prefmb1, CLIB_CACHE_LINE_BYTES, LOAD);
584 CLIB_PREFETCH (pref1, CLIB_CACHE_LINE_BYTES, LOAD);
590 b0 = vlib_get_buffer (vm, bi0);
591 b1 = vlib_get_buffer (vm, bi1);
593 mb0 = rte_mbuf_from_vlib_buffer (b0);
594 mb1 = rte_mbuf_from_vlib_buffer (b1);
596 any_clone = (b0->flags & VLIB_BUFFER_RECYCLE)
597 | (b1->flags & VLIB_BUFFER_RECYCLE);
598 if (PREDICT_FALSE (any_clone != 0))
600 if (PREDICT_FALSE ((b0->flags & VLIB_BUFFER_RECYCLE) != 0))
602 struct rte_mbuf *mb0_new = dpdk_replicate_packet_mb (b0);
603 if (PREDICT_FALSE (mb0_new == 0))
605 vlib_error_count (vm, node->node_index,
606 DPDK_TX_FUNC_ERROR_REPL_FAIL, 1);
607 b0->flags |= VLIB_BUFFER_REPL_FAIL;
611 vec_add1 (dm->recycle[my_cpu], bi0);
613 if (PREDICT_FALSE ((b1->flags & VLIB_BUFFER_RECYCLE) != 0))
615 struct rte_mbuf *mb1_new = dpdk_replicate_packet_mb (b1);
616 if (PREDICT_FALSE (mb1_new == 0))
618 vlib_error_count (vm, node->node_index,
619 DPDK_TX_FUNC_ERROR_REPL_FAIL, 1);
620 b1->flags |= VLIB_BUFFER_REPL_FAIL;
624 vec_add1 (dm->recycle[my_cpu], bi1);
628 delta0 = PREDICT_FALSE (b0->flags & VLIB_BUFFER_REPL_FAIL) ? 0 :
629 vlib_buffer_length_in_chain (vm, b0) - (i16) mb0->pkt_len;
630 delta1 = PREDICT_FALSE (b1->flags & VLIB_BUFFER_REPL_FAIL) ? 0 :
631 vlib_buffer_length_in_chain (vm, b1) - (i16) mb1->pkt_len;
633 new_data_len0 = (u16) ((i16) mb0->data_len + delta0);
634 new_data_len1 = (u16) ((i16) mb1->data_len + delta1);
635 new_pkt_len0 = (u16) ((i16) mb0->pkt_len + delta0);
636 new_pkt_len1 = (u16) ((i16) mb1->pkt_len + delta1);
638 b0->current_length = new_data_len0;
639 b1->current_length = new_data_len1;
640 mb0->data_len = new_data_len0;
641 mb1->data_len = new_data_len1;
642 mb0->pkt_len = new_pkt_len0;
643 mb1->pkt_len = new_pkt_len1;
645 mb0->data_off = (PREDICT_FALSE (b0->flags & VLIB_BUFFER_REPL_FAIL)) ?
646 mb0->data_off : (u16) (RTE_PKTMBUF_HEADROOM + b0->current_data);
647 mb1->data_off = (PREDICT_FALSE (b1->flags & VLIB_BUFFER_REPL_FAIL)) ?
648 mb1->data_off : (u16) (RTE_PKTMBUF_HEADROOM + b1->current_data);
650 if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE))
652 if (b0->flags & VLIB_BUFFER_IS_TRACED)
653 dpdk_tx_trace_buffer (dm, node, xd, queue_id, bi0, b0);
654 if (b1->flags & VLIB_BUFFER_IS_TRACED)
655 dpdk_tx_trace_buffer (dm, node, xd, queue_id, bi1, b1);
658 if (PREDICT_TRUE (any_clone == 0))
660 tx_vector[i % xd->nb_tx_desc] = mb0;
662 tx_vector[i % xd->nb_tx_desc] = mb1;
667 /* cloning was done, need to check for failure */
668 if (PREDICT_TRUE ((b0->flags & VLIB_BUFFER_REPL_FAIL) == 0))
670 tx_vector[i % xd->nb_tx_desc] = mb0;
673 if (PREDICT_TRUE ((b1->flags & VLIB_BUFFER_REPL_FAIL) == 0))
675 tx_vector[i % xd->nb_tx_desc] = mb1;
685 struct rte_mbuf *mb0;
694 b0 = vlib_get_buffer (vm, bi0);
696 mb0 = rte_mbuf_from_vlib_buffer (b0);
697 if (PREDICT_FALSE ((b0->flags & VLIB_BUFFER_RECYCLE) != 0))
699 struct rte_mbuf *mb0_new = dpdk_replicate_packet_mb (b0);
700 if (PREDICT_FALSE (mb0_new == 0))
702 vlib_error_count (vm, node->node_index,
703 DPDK_TX_FUNC_ERROR_REPL_FAIL, 1);
704 b0->flags |= VLIB_BUFFER_REPL_FAIL;
708 vec_add1 (dm->recycle[my_cpu], bi0);
711 delta0 = PREDICT_FALSE (b0->flags & VLIB_BUFFER_REPL_FAIL) ? 0 :
712 vlib_buffer_length_in_chain (vm, b0) - (i16) mb0->pkt_len;
714 new_data_len0 = (u16) ((i16) mb0->data_len + delta0);
715 new_pkt_len0 = (u16) ((i16) mb0->pkt_len + delta0);
717 b0->current_length = new_data_len0;
718 mb0->data_len = new_data_len0;
719 mb0->pkt_len = new_pkt_len0;
720 mb0->data_off = (PREDICT_FALSE (b0->flags & VLIB_BUFFER_REPL_FAIL)) ?
721 mb0->data_off : (u16) (RTE_PKTMBUF_HEADROOM + b0->current_data);
723 if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE))
724 if (b0->flags & VLIB_BUFFER_IS_TRACED)
725 dpdk_tx_trace_buffer (dm, node, xd, queue_id, bi0, b0);
727 if (PREDICT_TRUE ((b0->flags & VLIB_BUFFER_REPL_FAIL) == 0))
729 tx_vector[i % xd->nb_tx_desc] = mb0;
735 /* account for additional packets in the ring */
736 ring->tx_head += n_packets;
737 n_on_ring = ring->tx_head - ring->tx_tail;
739 /* transmit as many packets as possible */
740 n_packets = tx_burst_vector_internal (vm, xd, tx_vector);
743 * tx_pkts is the number of packets successfully transmitted
744 * This is the number originally on ring minus the number remaining on ring
746 tx_pkts = n_on_ring - n_packets;
748 if (PREDICT_FALSE (dm->flowcontrol_callback != 0))
750 if (PREDICT_FALSE (n_packets))
752 /* Callback may want to enable flowcontrol */
753 dm->flowcontrol_callback (vm, xd->vlib_hw_if_index,
754 ring->tx_head - ring->tx_tail);
758 /* Reset head/tail to avoid unnecessary wrap */
765 /* If there is no callback then drop any non-transmitted packets */
766 if (PREDICT_FALSE (n_packets))
768 vlib_simple_counter_main_t *cm;
769 vnet_main_t *vnm = vnet_get_main ();
771 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
772 VNET_INTERFACE_COUNTER_TX_ERROR);
774 vlib_increment_simple_counter (cm, my_cpu, xd->vlib_sw_if_index,
777 vlib_error_count (vm, node->node_index, DPDK_TX_FUNC_ERROR_PKT_DROP,
781 rte_pktmbuf_free (tx_vector[ring->tx_tail + n_packets]);
784 /* Reset head/tail to avoid unnecessary wrap */
789 /* Recycle replicated buffers */
790 if (PREDICT_FALSE (vec_len (dm->recycle[my_cpu])))
792 vlib_buffer_free (vm, dm->recycle[my_cpu],
793 vec_len (dm->recycle[my_cpu]));
794 _vec_len (dm->recycle[my_cpu]) = 0;
797 ASSERT (ring->tx_head >= ring->tx_tail);
803 dpdk_clear_hw_interface_counters (u32 instance)
805 dpdk_main_t *dm = &dpdk_main;
806 dpdk_device_t *xd = vec_elt_at_index (dm->devices, instance);
809 * Set the "last_cleared_stats" to the current stats, so that
810 * things appear to clear from a display perspective.
812 dpdk_update_counters (xd, vlib_time_now (dm->vlib_main));
814 clib_memcpy (&xd->last_cleared_stats, &xd->stats, sizeof (xd->stats));
815 clib_memcpy (xd->last_cleared_xstats, xd->xstats,
816 vec_len (xd->last_cleared_xstats) *
817 sizeof (xd->last_cleared_xstats[0]));
821 static clib_error_t *
822 dpdk_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
824 vnet_hw_interface_t *hif = vnet_get_hw_interface (vnm, hw_if_index);
825 uword is_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
826 dpdk_main_t *dm = &dpdk_main;
827 dpdk_device_t *xd = vec_elt_at_index (dm->devices, hif->dev_instance);
832 f64 now = vlib_time_now (dm->vlib_main);
834 if ((xd->flags & DPDK_DEVICE_FLAG_ADMIN_UP) == 0)
835 rv = rte_eth_dev_start (xd->device_index);
837 if (xd->flags & DPDK_DEVICE_FLAG_PROMISC)
838 rte_eth_promiscuous_enable (xd->device_index);
840 rte_eth_promiscuous_disable (xd->device_index);
842 rte_eth_allmulticast_enable (xd->device_index);
843 xd->flags |= DPDK_DEVICE_FLAG_ADMIN_UP;
844 dpdk_update_counters (xd, now);
845 dpdk_update_link_state (xd, now);
849 xd->flags &= ~DPDK_DEVICE_FLAG_ADMIN_UP;
851 rte_eth_allmulticast_disable (xd->device_index);
852 vnet_hw_interface_set_flags (vnm, xd->vlib_hw_if_index, 0);
853 rte_eth_dev_stop (xd->device_index);
855 /* For bonded interface, stop slave links */
856 if (xd->pmd == VNET_DPDK_PMD_BOND)
859 int nlink = rte_eth_bond_slaves_get (xd->device_index, slink, 16);
862 u8 dpdk_port = slink[--nlink];
863 rte_eth_dev_stop (dpdk_port);
869 clib_warning ("rte_eth_dev_%s error: %d", is_up ? "start" : "stop", rv);
871 return /* no error */ 0;
875 * Dynamically redirect all pkts from a specific interface
876 * to the specified node
879 dpdk_set_interface_next_node (vnet_main_t * vnm, u32 hw_if_index,
882 dpdk_main_t *xm = &dpdk_main;
883 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
884 dpdk_device_t *xd = vec_elt_at_index (xm->devices, hw->dev_instance);
886 /* Shut off redirection */
887 if (node_index == ~0)
889 xd->per_interface_next_index = node_index;
893 xd->per_interface_next_index =
894 vlib_node_add_next (xm->vlib_main, dpdk_input_node.index, node_index);
898 static clib_error_t *
899 dpdk_subif_add_del_function (vnet_main_t * vnm,
901 struct vnet_sw_interface_t *st, int is_add)
903 dpdk_main_t *xm = &dpdk_main;
904 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
905 dpdk_device_t *xd = vec_elt_at_index (xm->devices, hw->dev_instance);
906 vnet_sw_interface_t *t = (vnet_sw_interface_t *) st;
908 u32 prev_subifs = xd->num_subifs;
909 clib_error_t *err = 0;
913 else if (xd->num_subifs)
916 if ((xd->flags & DPDK_DEVICE_FLAG_PMD) == 0)
919 /* currently we program VLANS only for IXGBE VF and I40E VF */
920 if ((xd->pmd != VNET_DPDK_PMD_IXGBEVF) && (xd->pmd != VNET_DPDK_PMD_I40EVF))
923 if (t->sub.eth.flags.no_tags == 1)
926 if ((t->sub.eth.flags.one_tag != 1) || (t->sub.eth.flags.exact_match != 1))
928 xd->num_subifs = prev_subifs;
929 err = clib_error_return (0, "unsupported VLAN setup");
933 vlan_offload = rte_eth_dev_get_vlan_offload (xd->device_index);
934 vlan_offload |= ETH_VLAN_FILTER_OFFLOAD;
936 if ((r = rte_eth_dev_set_vlan_offload (xd->device_index, vlan_offload)))
938 xd->num_subifs = prev_subifs;
939 err = clib_error_return (0, "rte_eth_dev_set_vlan_offload[%d]: err %d",
940 xd->device_index, r);
946 rte_eth_dev_vlan_filter (xd->device_index, t->sub.eth.outer_vlan_id,
949 xd->num_subifs = prev_subifs;
950 err = clib_error_return (0, "rte_eth_dev_vlan_filter[%d]: err %d",
951 xd->device_index, r);
957 xd->flags |= DPDK_DEVICE_FLAG_HAVE_SUBIF;
959 xd->flags &= ~DPDK_DEVICE_FLAG_HAVE_SUBIF;
965 VNET_DEVICE_CLASS (dpdk_device_class) = {
967 .tx_function = dpdk_interface_tx,
968 .tx_function_n_errors = DPDK_TX_FUNC_N_ERROR,
969 .tx_function_error_strings = dpdk_tx_func_error_strings,
970 .format_device_name = format_dpdk_device_name,
971 .format_device = format_dpdk_device,
972 .format_tx_trace = format_dpdk_tx_dma_trace,
973 .clear_counters = dpdk_clear_hw_interface_counters,
974 .admin_up_down_function = dpdk_interface_admin_up_down,
975 .subif_add_del_function = dpdk_subif_add_del_function,
976 .rx_redirect_to_node = dpdk_set_interface_next_node,
977 .no_flatten_output_chains = 1,
978 .mac_addr_change_function = dpdk_set_mac_address,
981 VLIB_DEVICE_TX_FUNCTION_MULTIARCH (dpdk_device_class, dpdk_interface_tx)
985 dpdk_set_flowcontrol_callback (vlib_main_t * vm,
986 dpdk_flowcontrol_callback_t callback)
988 dpdk_main.flowcontrol_callback = callback;
991 #define UP_DOWN_FLAG_EVENT 1
995 dpdk_get_admin_up_down_in_progress (void)
997 return dpdk_main.admin_up_down_in_progress;
1001 admin_up_down_process (vlib_main_t * vm,
1002 vlib_node_runtime_t * rt, vlib_frame_t * f)
1004 clib_error_t *error = 0;
1006 uword *event_data = 0;
1012 vlib_process_wait_for_event (vm);
1014 event_type = vlib_process_get_events (vm, &event_data);
1016 dpdk_main.admin_up_down_in_progress = 1;
1020 case UP_DOWN_FLAG_EVENT:
1022 if (vec_len (event_data) == 2)
1024 sw_if_index = event_data[0];
1025 flags = event_data[1];
1027 vnet_sw_interface_set_flags (vnet_get_main (), sw_if_index,
1029 clib_error_report (error);
1035 vec_reset_length (event_data);
1037 dpdk_main.admin_up_down_in_progress = 0;
1040 return 0; /* or not */
1044 VLIB_REGISTER_NODE (admin_up_down_process_node,static) = {
1045 .function = admin_up_down_process,
1046 .type = VLIB_NODE_TYPE_PROCESS,
1047 .name = "admin-up-down-process",
1048 .process_log2_n_stack_bytes = 17, // 256KB
1053 * Asynchronously invoke vnet_sw_interface_set_flags via the admin_up_down
1054 * process. Useful for avoiding long blocking delays (>150ms) in the dpdk
1056 * WARNING: when posting this event, no other interface-related calls should
1057 * be made (e.g. vnet_create_sw_interface()) while the event is being
1058 * processed (admin_up_down_in_progress). This is required in order to avoid
1059 * race conditions in manipulating interface data structures.
1062 post_sw_interface_set_flags (vlib_main_t * vm, u32 sw_if_index, u32 flags)
1064 uword *d = vlib_process_signal_event_data
1065 (vm, admin_up_down_process_node.index,
1066 UP_DOWN_FLAG_EVENT, 2, sizeof (u32));
1072 * Return a copy of the DPDK port stats in dest.
1075 dpdk_get_hw_interface_stats (u32 hw_if_index, struct rte_eth_stats *dest)
1077 dpdk_main_t *dm = &dpdk_main;
1078 vnet_main_t *vnm = vnet_get_main ();
1079 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1080 dpdk_device_t *xd = vec_elt_at_index (dm->devices, hi->dev_instance);
1084 return clib_error_return (0, "Missing or NULL argument");
1088 return clib_error_return (0,
1089 "Unable to get DPDK device from HW interface");
1092 dpdk_update_counters (xd, vlib_time_now (dm->vlib_main));
1094 clib_memcpy (dest, &xd->stats, sizeof (xd->stats));
1099 * Return the number of dpdk mbufs
1102 dpdk_num_mbufs (void)
1104 dpdk_main_t *dm = &dpdk_main;
1106 return dm->conf->num_mbufs;
1110 * Return the pmd type for a given hardware interface
1113 dpdk_get_pmd_type (vnet_hw_interface_t * hi)
1115 dpdk_main_t *dm = &dpdk_main;
1120 xd = vec_elt_at_index (dm->devices, hi->dev_instance);
1128 * Return the cpu socket for a given hardware interface
1131 dpdk_get_cpu_socket (vnet_hw_interface_t * hi)
1133 dpdk_main_t *dm = &dpdk_main;
1138 xd = vec_elt_at_index (dm->devices, hi->dev_instance);
1142 return xd->cpu_socket;
1146 * fd.io coding-style-patch-verification: ON
1149 * eval: (c-set-style "gnu")