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>
20 #include <vnet/ethernet/ethernet.h>
21 #include <vnet/devices/dpdk/dpdk.h>
23 #include "dpdk_priv.h"
24 #include <vppinfra/error.h>
26 #define foreach_dpdk_tx_func_error \
27 _(BAD_RETVAL, "DPDK tx function returned an error") \
28 _(RING_FULL, "Tx packet drops (ring full)") \
29 _(PKT_DROP, "Tx packet drops (dpdk tx failure)") \
30 _(REPL_FAIL, "Tx packet drops (replication failure)")
33 #define _(f,s) DPDK_TX_FUNC_ERROR_##f,
34 foreach_dpdk_tx_func_error
37 } dpdk_tx_func_error_t;
39 static char * dpdk_tx_func_error_strings[] = {
41 foreach_dpdk_tx_func_error
45 static struct rte_mbuf * dpdk_replicate_packet_mb (vlib_buffer_t * b)
47 vlib_main_t * vm = vlib_get_main();
48 vlib_buffer_main_t * bm = vm->buffer_main;
49 struct rte_mbuf * first_mb = 0, * new_mb, * pkt_mb, ** prev_mb_next = 0;
50 u8 nb_segs, nb_segs_left;
52 unsigned socket_id = rte_socket_id();
54 ASSERT (bm->pktmbuf_pools[socket_id]);
55 pkt_mb = ((struct rte_mbuf *)b)-1;
56 nb_segs = pkt_mb->nb_segs;
57 for (nb_segs_left = nb_segs; nb_segs_left; nb_segs_left--)
59 if (PREDICT_FALSE(pkt_mb == 0))
61 clib_warning ("Missing %d mbuf chain segment(s): "
62 "(nb_segs = %d, nb_segs_left = %d)!",
63 nb_segs - nb_segs_left, nb_segs, nb_segs_left);
65 rte_pktmbuf_free(first_mb);
68 new_mb = rte_pktmbuf_alloc (bm->pktmbuf_pools[socket_id]);
69 if (PREDICT_FALSE(new_mb == 0))
72 rte_pktmbuf_free(first_mb);
77 * Copy packet info into 1st segment.
82 rte_pktmbuf_pkt_len (first_mb) = pkt_mb->pkt_len;
83 first_mb->nb_segs = pkt_mb->nb_segs;
84 first_mb->port = pkt_mb->port;
85 #ifdef DAW_FIXME // TX Offload support TBD
86 first_mb->vlan_macip = pkt_mb->vlan_macip;
87 first_mb->hash = pkt_mb->hash;
88 first_mb->ol_flags = pkt_mb->ol_flags
93 ASSERT(prev_mb_next != 0);
94 *prev_mb_next = new_mb;
98 * Copy packet segment data into new mbuf segment.
100 rte_pktmbuf_data_len (new_mb) = pkt_mb->data_len;
101 copy_bytes = pkt_mb->data_len + RTE_PKTMBUF_HEADROOM;
102 ASSERT(copy_bytes <= pkt_mb->buf_len);
103 memcpy(new_mb->buf_addr, pkt_mb->buf_addr, copy_bytes);
105 prev_mb_next = &new_mb->next;
106 pkt_mb = pkt_mb->next;
110 __rte_mbuf_sanity_check(first_mb, 1);
120 /* Copy of VLIB buffer; packet data stored in pre_data. */
121 vlib_buffer_t buffer;
122 } dpdk_tx_dma_trace_t;
125 dpdk_tx_trace_buffer (dpdk_main_t * dm,
126 vlib_node_runtime_t * node,
130 vlib_buffer_t * buffer)
132 vlib_main_t * vm = vlib_get_main();
133 dpdk_tx_dma_trace_t * t0;
134 struct rte_mbuf * mb;
136 mb = ((struct rte_mbuf *)buffer)-1;
138 t0 = vlib_add_trace (vm, node, buffer, sizeof (t0[0]));
139 t0->queue_index = queue_id;
140 t0->device_index = xd->device_index;
141 t0->buffer_index = buffer_index;
142 memcpy (&t0->mb, mb, sizeof (t0->mb));
143 memcpy (&t0->buffer, buffer, sizeof (buffer[0]) - sizeof (buffer->pre_data));
144 memcpy (t0->buffer.pre_data, buffer->data + buffer->current_data,
145 sizeof (t0->buffer.pre_data));
149 * This function calls the dpdk's tx_burst function to transmit the packets
150 * on the tx_vector. It manages a lock per-device if the device does not
151 * support multiple queues. It returns the number of packets untransmitted
152 * on the tx_vector. If all packets are transmitted (the normal case), the
153 * function returns 0.
155 * The tx_burst function may not be able to transmit all packets because the
156 * dpdk ring is full. If a flowcontrol callback function has been configured
157 * then the function simply returns. If no callback has been configured, the
158 * function will retry calling tx_burst with the remaining packets. This will
159 * continue until all packets are transmitted or tx_burst indicates no packets
160 * could be transmitted. (The caller can drop the remaining packets.)
162 * The function assumes there is at least one packet on the tx_vector.
165 u32 tx_burst_vector_internal (vlib_main_t * vm,
167 struct rte_mbuf ** tx_vector)
169 dpdk_main_t * dm = &dpdk_main;
178 ring = vec_header(tx_vector, sizeof(*ring));
180 n_packets = ring->tx_head - ring->tx_tail;
182 tx_head = ring->tx_head % DPDK_TX_RING_SIZE;
185 * Ensure rte_eth_tx_burst is not called with 0 packets, which can lead to
186 * unpredictable results.
188 ASSERT(n_packets > 0);
191 * Check for tx_vector overflow. If this fails it is a system configuration
192 * error. The ring should be sized big enough to handle the largest un-flowed
193 * off burst from a traffic manager. A larger size also helps performance
194 * a bit because it decreases the probability of having to issue two tx_burst
195 * calls due to a ring wrap.
197 ASSERT(n_packets < DPDK_TX_RING_SIZE);
200 * If there is no flowcontrol callback, there is only temporary buffering
201 * on the tx_vector and so the tail should always be 0.
203 ASSERT(dm->flowcontrol_callback || ring->tx_tail == 0);
206 * If there is a flowcontrol callback, don't retry any incomplete tx_bursts.
207 * Apply backpressure instead. If there is no callback, keep retrying until
208 * a tx_burst sends no packets. n_retry of 255 essentially means no retry
211 n_retry = dm->flowcontrol_callback ? 0 : 255;
213 queue_id = vm->cpu_index;
216 /* start the burst at the tail */
217 tx_tail = ring->tx_tail % DPDK_TX_RING_SIZE;
220 * This device only supports one TX queue,
221 * and we're running multi-threaded...
223 if (PREDICT_FALSE(xd->lockp != 0))
226 while (__sync_lock_test_and_set (xd->lockp, 1))
230 if (PREDICT_TRUE(xd->dev_type == VNET_DPDK_DEV_ETH))
232 if (PREDICT_TRUE(tx_head > tx_tail))
234 /* no wrap, transmit in one burst */
235 rv = rte_eth_tx_burst(xd->device_index,
238 (uint16_t) (tx_head-tx_tail));
243 * This can only happen if there is a flowcontrol callback.
244 * We need to split the transmit into two calls: one for
245 * the packets up to the wrap point, and one to continue
246 * at the start of the ring.
247 * Transmit pkts up to the wrap point.
249 rv = rte_eth_tx_burst(xd->device_index,
252 (uint16_t) (DPDK_TX_RING_SIZE - tx_tail));
255 * If we transmitted everything we wanted, then allow 1 retry
256 * so we can try to transmit the rest. If we didn't transmit
257 * everything, stop now.
259 n_retry = (rv == DPDK_TX_RING_SIZE - tx_tail) ? 1 : 0;
262 else if (xd->dev_type == VNET_DPDK_DEV_VHOST_USER)
264 if (PREDICT_TRUE(tx_head > tx_tail))
266 /* no wrap, transmit in one burst */
267 rv = rte_vhost_enqueue_burst(&xd->vu_vhost_dev, VIRTIO_RXQ,
269 (uint16_t) (tx_head-tx_tail));
270 if (PREDICT_TRUE(rv > 0))
272 if (dpdk_vhost_user_want_interrupt(xd, VIRTIO_RXQ)) {
273 dpdk_vu_vring *vring = &(xd->vu_intf->vrings[VIRTIO_RXQ]);
274 vring->n_since_last_int += rv;
276 if (vring->n_since_last_int > dm->vhost_coalesce_frames)
277 dpdk_vhost_user_send_interrupt(dm->vlib_main, xd, VIRTIO_RXQ);
282 rte_pktmbuf_free (tx_vector[tx_tail+c]);
288 * If we transmitted everything we wanted, then allow 1 retry
289 * so we can try to transmit the rest. If we didn't transmit
290 * everything, stop now.
292 rv = rte_vhost_enqueue_burst(&xd->vu_vhost_dev, VIRTIO_RXQ,
294 (uint16_t) (DPDK_TX_RING_SIZE - tx_tail));
296 if (PREDICT_TRUE(rv > 0))
298 if (dpdk_vhost_user_want_interrupt(xd, VIRTIO_RXQ)) {
299 dpdk_vu_vring *vring = &(xd->vu_intf->vrings[VIRTIO_RXQ]);
300 vring->n_since_last_int += rv;
302 if (vring->n_since_last_int > dm->vhost_coalesce_frames)
303 dpdk_vhost_user_send_interrupt(dm->vlib_main, xd, VIRTIO_RXQ);
308 rte_pktmbuf_free (tx_vector[tx_tail+c]);
311 n_retry = (rv == DPDK_TX_RING_SIZE - tx_tail) ? 1 : 0;
314 else if (xd->dev_type == VNET_DPDK_DEV_KNI)
316 if (PREDICT_TRUE(tx_head > tx_tail))
318 /* no wrap, transmit in one burst */
319 rv = rte_kni_tx_burst(xd->kni,
321 (uint16_t) (tx_head-tx_tail));
326 * This can only happen if there is a flowcontrol callback.
327 * We need to split the transmit into two calls: one for
328 * the packets up to the wrap point, and one to continue
329 * at the start of the ring.
330 * Transmit pkts up to the wrap point.
332 rv = rte_kni_tx_burst(xd->kni,
334 (uint16_t) (DPDK_TX_RING_SIZE - tx_tail));
337 * If we transmitted everything we wanted, then allow 1 retry
338 * so we can try to transmit the rest. If we didn't transmit
339 * everything, stop now.
341 n_retry = (rv == DPDK_TX_RING_SIZE - tx_tail) ? 1 : 0;
350 if (PREDICT_FALSE(xd->lockp != 0))
353 if (PREDICT_FALSE(rv < 0))
355 // emit non-fatal message, bump counter
356 vnet_main_t * vnm = dm->vnet_main;
357 vnet_interface_main_t * im = &vnm->interface_main;
360 node_index = vec_elt_at_index(im->hw_interfaces,
361 xd->vlib_hw_if_index)->tx_node_index;
363 vlib_error_count (vm, node_index, DPDK_TX_FUNC_ERROR_BAD_RETVAL, 1);
364 clib_warning ("rte_eth_tx_burst[%d]: error %d", xd->device_index, rv);
365 return n_packets; // untransmitted packets
367 ring->tx_tail += (u16)rv;
368 n_packets -= (uint16_t) rv;
369 } while (rv && n_packets && (n_retry>0));
376 * This function transmits any packets on the interface's tx_vector and returns
377 * the number of packets untransmitted on the tx_vector. If the tx_vector is
378 * empty the function simply returns 0.
380 * It is intended to be called by a traffic manager which has flowed-off an
381 * interface to see if the interface can be flowed-on again.
383 u32 dpdk_interface_tx_vector (vlib_main_t * vm, u32 dev_instance)
385 dpdk_main_t * dm = &dpdk_main;
388 struct rte_mbuf ** tx_vector;
391 /* param is dev_instance and not hw_if_index to save another lookup */
392 xd = vec_elt_at_index (dm->devices, dev_instance);
394 queue_id = vm->cpu_index;
395 tx_vector = xd->tx_vectors[queue_id];
397 /* If no packets on the ring, don't bother calling tx function */
398 ring = vec_header(tx_vector, sizeof(*ring));
399 if (ring->tx_head == ring->tx_tail)
404 return tx_burst_vector_internal (vm, xd, tx_vector);
408 * Transmits the packets on the frame to the interface associated with the
409 * node. It first copies packets on the frame to a tx_vector containing the
410 * rte_mbuf pointers. It then passes this vector to tx_burst_vector_internal
411 * which calls the dpdk tx_burst function.
413 * The tx_vector is treated slightly differently depending on whether or
414 * not a flowcontrol callback function has been configured. If there is no
415 * callback, the tx_vector is a temporary array of rte_mbuf packet pointers.
416 * Its entries are written and consumed before the function exits.
418 * If there is a callback then the transmit is being invoked in the presence
419 * of a traffic manager. Here the tx_vector is treated like a ring of rte_mbuf
420 * pointers. If not all packets can be transmitted, the untransmitted packets
421 * stay on the tx_vector until the next call. The callback allows the traffic
422 * manager to flow-off dequeues to the interface. The companion function
423 * dpdk_interface_tx_vector() allows the traffic manager to detect when
424 * it should flow-on the interface again.
427 dpdk_interface_tx (vlib_main_t * vm,
428 vlib_node_runtime_t * node,
431 dpdk_main_t * dm = &dpdk_main;
432 vnet_interface_output_runtime_t * rd = (void *) node->runtime_data;
433 dpdk_device_t * xd = vec_elt_at_index (dm->devices, rd->dev_instance);
434 u32 n_packets = f->n_vectors;
437 struct rte_mbuf ** tx_vector;
445 my_cpu = vm->cpu_index;
449 tx_vector = xd->tx_vectors[queue_id];
450 ring = vec_header(tx_vector, sizeof(*ring));
452 n_on_ring = ring->tx_head - ring->tx_tail;
453 from = vlib_frame_vector_args (f);
455 ASSERT(n_packets <= VLIB_FRAME_SIZE);
457 if (PREDICT_FALSE(n_on_ring + n_packets > DPDK_TX_RING_SIZE))
460 * Overflowing the ring should never happen.
461 * If it does then drop the whole frame.
463 vlib_error_count (vm, node->node_index, DPDK_TX_FUNC_ERROR_RING_FULL,
468 u32 bi0 = from[n_packets];
469 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
470 struct rte_mbuf *mb0 = ((struct rte_mbuf *)b0) - 1;
471 rte_pktmbuf_free (mb0);
476 if (PREDICT_FALSE(dm->tx_pcap_enable))
482 vlib_buffer_t * b0 = vlib_get_buffer (vm, bi0);
483 if (dm->pcap_sw_if_index == 0 ||
484 dm->pcap_sw_if_index == vnet_buffer(b0)->sw_if_index [VLIB_TX])
485 pcap_add_buffer (&dm->pcap_main, vm, bi0, 512);
491 from = vlib_frame_vector_args (f);
493 i = ring->tx_head % DPDK_TX_RING_SIZE;
499 struct rte_mbuf * mb0, * mb1;
500 struct rte_mbuf * prefmb0, * prefmb1;
501 vlib_buffer_t * b0, * b1;
502 vlib_buffer_t * pref0, * pref1;
504 u16 new_data_len0, new_data_len1;
505 u16 new_pkt_len0, new_pkt_len1;
510 pref0 = vlib_get_buffer (vm, pi0);
511 pref1 = vlib_get_buffer (vm, pi1);
513 prefmb0 = ((struct rte_mbuf *)pref0) - 1;
514 prefmb1 = ((struct rte_mbuf *)pref1) - 1;
516 CLIB_PREFETCH(prefmb0, CLIB_CACHE_LINE_BYTES, LOAD);
517 CLIB_PREFETCH(pref0, CLIB_CACHE_LINE_BYTES, LOAD);
518 CLIB_PREFETCH(prefmb1, CLIB_CACHE_LINE_BYTES, LOAD);
519 CLIB_PREFETCH(pref1, CLIB_CACHE_LINE_BYTES, LOAD);
525 b0 = vlib_get_buffer (vm, bi0);
526 b1 = vlib_get_buffer (vm, bi1);
528 mb0 = ((struct rte_mbuf *)b0) - 1;
529 mb1 = ((struct rte_mbuf *)b1) - 1;
531 any_clone = b0->clone_count | b1->clone_count;
532 if (PREDICT_FALSE(any_clone != 0))
534 if (PREDICT_FALSE(b0->clone_count != 0))
536 struct rte_mbuf * mb0_new = dpdk_replicate_packet_mb (b0);
537 if (PREDICT_FALSE(mb0_new == 0))
539 vlib_error_count (vm, node->node_index,
540 DPDK_TX_FUNC_ERROR_REPL_FAIL, 1);
541 b0->flags |= VLIB_BUFFER_REPL_FAIL;
545 vec_add1 (dm->recycle[my_cpu], bi0);
547 if (PREDICT_FALSE(b1->clone_count != 0))
549 struct rte_mbuf * mb1_new = dpdk_replicate_packet_mb (b1);
550 if (PREDICT_FALSE(mb1_new == 0))
552 vlib_error_count (vm, node->node_index,
553 DPDK_TX_FUNC_ERROR_REPL_FAIL, 1);
554 b1->flags |= VLIB_BUFFER_REPL_FAIL;
558 vec_add1 (dm->recycle[my_cpu], bi1);
562 delta0 = PREDICT_FALSE(b0->flags & VLIB_BUFFER_REPL_FAIL) ? 0 :
563 vlib_buffer_length_in_chain (vm, b0) - (i16) mb0->pkt_len;
564 delta1 = PREDICT_FALSE(b1->flags & VLIB_BUFFER_REPL_FAIL) ? 0 :
565 vlib_buffer_length_in_chain (vm, b1) - (i16) mb1->pkt_len;
567 new_data_len0 = (u16)((i16) mb0->data_len + delta0);
568 new_data_len1 = (u16)((i16) mb1->data_len + delta1);
569 new_pkt_len0 = (u16)((i16) mb0->pkt_len + delta0);
570 new_pkt_len1 = (u16)((i16) mb1->pkt_len + delta1);
572 b0->current_length = new_data_len0;
573 b1->current_length = new_data_len1;
574 mb0->data_len = new_data_len0;
575 mb1->data_len = new_data_len1;
576 mb0->pkt_len = new_pkt_len0;
577 mb1->pkt_len = new_pkt_len1;
579 mb0->data_off = (PREDICT_FALSE(b0->flags & VLIB_BUFFER_REPL_FAIL)) ?
580 mb0->data_off : (u16)(RTE_PKTMBUF_HEADROOM + b0->current_data);
581 mb1->data_off = (PREDICT_FALSE(b1->flags & VLIB_BUFFER_REPL_FAIL)) ?
582 mb1->data_off : (u16)(RTE_PKTMBUF_HEADROOM + b1->current_data);
584 if (PREDICT_FALSE(node->flags & VLIB_NODE_FLAG_TRACE))
586 if (b0->flags & VLIB_BUFFER_IS_TRACED)
587 dpdk_tx_trace_buffer (dm, node, xd, queue_id, bi0, b0);
588 if (b1->flags & VLIB_BUFFER_IS_TRACED)
589 dpdk_tx_trace_buffer (dm, node, xd, queue_id, bi1, b1);
592 if (PREDICT_TRUE(any_clone == 0))
594 tx_vector[i % DPDK_TX_RING_SIZE] = mb0;
596 tx_vector[i % DPDK_TX_RING_SIZE] = mb1;
601 /* cloning was done, need to check for failure */
602 if (PREDICT_TRUE((b0->flags & VLIB_BUFFER_REPL_FAIL) == 0))
604 tx_vector[i % DPDK_TX_RING_SIZE] = mb0;
607 if (PREDICT_TRUE((b1->flags & VLIB_BUFFER_REPL_FAIL) == 0))
609 tx_vector[i % DPDK_TX_RING_SIZE] = mb1;
619 struct rte_mbuf * mb0;
628 b0 = vlib_get_buffer (vm, bi0);
630 mb0 = ((struct rte_mbuf *)b0) - 1;
631 if (PREDICT_FALSE(b0->clone_count != 0))
633 struct rte_mbuf * mb0_new = dpdk_replicate_packet_mb (b0);
634 if (PREDICT_FALSE(mb0_new == 0))
636 vlib_error_count (vm, node->node_index,
637 DPDK_TX_FUNC_ERROR_REPL_FAIL, 1);
638 b0->flags |= VLIB_BUFFER_REPL_FAIL;
642 vec_add1 (dm->recycle[my_cpu], bi0);
645 delta0 = PREDICT_FALSE(b0->flags & VLIB_BUFFER_REPL_FAIL) ? 0 :
646 vlib_buffer_length_in_chain (vm, b0) - (i16) mb0->pkt_len;
648 new_data_len0 = (u16)((i16) mb0->data_len + delta0);
649 new_pkt_len0 = (u16)((i16) mb0->pkt_len + delta0);
651 b0->current_length = new_data_len0;
652 mb0->data_len = new_data_len0;
653 mb0->pkt_len = new_pkt_len0;
654 mb0->data_off = (PREDICT_FALSE(b0->flags & VLIB_BUFFER_REPL_FAIL)) ?
655 mb0->data_off : (u16)(RTE_PKTMBUF_HEADROOM + b0->current_data);
657 if (PREDICT_FALSE(node->flags & VLIB_NODE_FLAG_TRACE))
658 if (b0->flags & VLIB_BUFFER_IS_TRACED)
659 dpdk_tx_trace_buffer (dm, node, xd, queue_id, bi0, b0);
661 if (PREDICT_TRUE((b0->flags & VLIB_BUFFER_REPL_FAIL) == 0))
663 tx_vector[i % DPDK_TX_RING_SIZE] = mb0;
669 /* account for additional packets in the ring */
670 ring->tx_head += n_packets;
671 n_on_ring = ring->tx_head - ring->tx_tail;
673 /* transmit as many packets as possible */
674 n_packets = tx_burst_vector_internal (vm, xd, tx_vector);
677 * tx_pkts is the number of packets successfully transmitted
678 * This is the number originally on ring minus the number remaining on ring
680 tx_pkts = n_on_ring - n_packets;
682 if (PREDICT_FALSE(dm->flowcontrol_callback != 0))
684 if (PREDICT_FALSE(n_packets))
686 /* Callback may want to enable flowcontrol */
687 dm->flowcontrol_callback(vm, xd->vlib_hw_if_index, ring->tx_head - ring->tx_tail);
691 /* Reset head/tail to avoid unnecessary wrap */
698 /* If there is no callback then drop any non-transmitted packets */
699 if (PREDICT_FALSE(n_packets))
701 vlib_simple_counter_main_t * cm;
702 vnet_main_t * vnm = vnet_get_main();
704 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
705 VNET_INTERFACE_COUNTER_TX_ERROR);
707 vlib_increment_simple_counter (cm, my_cpu, xd->vlib_sw_if_index, n_packets);
709 vlib_error_count (vm, node->node_index, DPDK_TX_FUNC_ERROR_PKT_DROP,
713 rte_pktmbuf_free (tx_vector[ring->tx_tail + n_packets]);
716 /* Reset head/tail to avoid unnecessary wrap */
721 /* Recycle replicated buffers */
722 if (PREDICT_FALSE(vec_len(dm->recycle[my_cpu])))
724 vlib_buffer_free (vm, dm->recycle[my_cpu], vec_len(dm->recycle[my_cpu]));
725 _vec_len(dm->recycle[my_cpu]) = 0;
728 ASSERT(ring->tx_head >= ring->tx_tail);
733 static int dpdk_device_renumber (vnet_hw_interface_t * hi,
734 u32 new_dev_instance)
736 dpdk_main_t * dm = &dpdk_main;
737 dpdk_device_t * xd = vec_elt_at_index (dm->devices, hi->dev_instance);
739 if (!xd || xd->dev_type != VNET_DPDK_DEV_VHOST_USER) {
740 clib_warning("cannot renumber non-vhost-user interface (sw_if_index: %d)",
745 xd->vu_if_id = new_dev_instance;
749 static u8 * format_dpdk_device_name (u8 * s, va_list * args)
751 dpdk_main_t * dm = &dpdk_main;
752 char *devname_format;
754 u32 i = va_arg (*args, u32);
755 struct rte_eth_dev_info dev_info;
758 if (dm->interface_name_format_decimal)
759 devname_format = "%s%d/%d/%d";
761 devname_format = "%s%x/%x/%x";
763 if (dm->devices[i].dev_type == VNET_DPDK_DEV_KNI) {
764 return format(s, "kni%d", dm->devices[i].kni_port_id);
765 } else if (dm->devices[i].dev_type == VNET_DPDK_DEV_VHOST_USER) {
766 return format(s, "VirtualEthernet0/0/%d", dm->devices[i].vu_if_id);
768 switch (dm->devices[i].port_type)
770 case VNET_DPDK_PORT_TYPE_ETH_1G:
771 device_name = "GigabitEthernet";
774 case VNET_DPDK_PORT_TYPE_ETH_10G:
775 device_name = "TenGigabitEthernet";
778 case VNET_DPDK_PORT_TYPE_ETH_40G:
779 device_name = "FortyGigabitEthernet";
782 case VNET_DPDK_PORT_TYPE_ETH_SWITCH:
783 device_name = "EthernetSwitch";
787 case VNET_DPDK_PORT_TYPE_NETMAP:
788 rte_eth_dev_info_get(i, &dev_info);
789 return format(s, "netmap:%s", dev_info.driver_name);
792 case VNET_DPDK_PORT_TYPE_AF_PACKET:
793 rte_eth_dev_info_get(i, &dev_info);
794 return format(s, "af_packet%d", dm->devices[i].af_packet_port_id);
797 case VNET_DPDK_PORT_TYPE_UNKNOWN:
798 device_name = "UnknownEthernet";
802 rte_eth_dev_info_get(i, &dev_info);
803 ret = format (s, devname_format, device_name, dev_info.pci_dev->addr.bus,
804 dev_info.pci_dev->addr.devid,
805 dev_info.pci_dev->addr.function);
807 /* address Chelsio cards which share PCI address */
808 if (dm->devices[i].pmd == VNET_DPDK_PMD_CXGBE) {
809 struct rte_eth_dev_info di;
812 rte_eth_dev_info_get(i+1, &di);
813 if (di.pci_dev && memcmp(&dev_info.pci_dev->addr, &di.pci_dev->addr,
814 sizeof(struct rte_pci_addr)) == 0)
815 return format(ret, "/0");
818 rte_eth_dev_info_get(i-1, &di);
819 if (di.pci_dev && memcmp(&dev_info.pci_dev->addr, &di.pci_dev->addr,
820 sizeof(struct rte_pci_addr)) == 0)
821 return format(ret, "/1");
826 static u8 * format_dpdk_device_type (u8 * s, va_list * args)
828 dpdk_main_t * dm = &dpdk_main;
830 u32 i = va_arg (*args, u32);
832 if (dm->devices[i].dev_type == VNET_DPDK_DEV_KNI) {
833 return format(s, "Kernel NIC Interface");
834 } else if (dm->devices[i].dev_type == VNET_DPDK_DEV_VHOST_USER) {
835 return format(s, "vhost-user interface");
838 switch (dm->devices[i].pmd)
840 case VNET_DPDK_PMD_E1000EM:
841 dev_type = "Intel 82540EM (e1000)";
844 case VNET_DPDK_PMD_IGB:
845 dev_type = "Intel e1000";
848 case VNET_DPDK_PMD_I40E:
849 dev_type = "Intel X710/XL710 Family";
852 case VNET_DPDK_PMD_I40EVF:
853 dev_type = "Intel X710/XL710 Family VF";
856 case VNET_DPDK_PMD_FM10K:
857 dev_type = "Intel FM10000 Family Ethernet Switch";
860 case VNET_DPDK_PMD_IGBVF:
861 dev_type = "Intel e1000 VF";
864 case VNET_DPDK_PMD_VIRTIO:
865 dev_type = "Red Hat Virtio";
868 case VNET_DPDK_PMD_IXGBEVF:
869 dev_type = "Intel 82599 VF";
872 case VNET_DPDK_PMD_IXGBE:
873 dev_type = "Intel 82599";
876 case VNET_DPDK_PMD_VICE:
877 case VNET_DPDK_PMD_ENIC:
878 dev_type = "Cisco VIC";
881 case VNET_DPDK_PMD_CXGBE:
882 dev_type = "Chelsio T4/T5";
885 case VNET_DPDK_PMD_VMXNET3:
886 dev_type = "VMware VMXNET3";
890 case VNET_DPDK_PMD_NETMAP:
891 dev_type = "Netmap/Vale";
895 case VNET_DPDK_PMD_AF_PACKET:
896 dev_type = "af_packet";
900 case VNET_DPDK_PMD_UNKNOWN:
901 dev_type = "### UNKNOWN ###";
905 return format (s, dev_type);
908 static u8 * format_dpdk_link_status (u8 * s, va_list * args)
910 dpdk_device_t * xd = va_arg (*args, dpdk_device_t *);
911 struct rte_eth_link * l = &xd->link;
912 vnet_main_t * vnm = vnet_get_main();
913 vnet_hw_interface_t * hi = vnet_get_hw_interface (vnm, xd->vlib_hw_if_index);
915 s = format (s, "%s ", l->link_status ? "up" : "down");
918 u32 promisc = rte_eth_promiscuous_get (xd->device_index);
920 s = format (s, "%s duplex ", (l->link_duplex == ETH_LINK_FULL_DUPLEX) ?
922 s = format (s, "speed %u mtu %d %s\n", l->link_speed,
923 hi->max_packet_bytes, promisc ? " promisc" : "");
926 s = format (s, "\n");
934 if (format_get_indent (s) > next_split ) { \
935 next_split += _line_len; \
936 s = format(s,"\n%U", format_white_space, indent); \
938 s = format(s, "%s ", str); \
941 static u8 * format_dpdk_rss_hf_name(u8 * s, va_list * args)
943 u64 bitmap = va_arg (*args, u64);
944 int next_split = _line_len;
945 int indent = format_get_indent (s);
948 return format(s, "none");
955 static u8 * format_dpdk_rx_offload_caps(u8 * s, va_list * args)
957 u32 bitmap = va_arg (*args, u32);
958 int next_split = _line_len;
959 int indent = format_get_indent (s);
962 return format(s, "none");
964 foreach_dpdk_rx_offload_caps
969 static u8 * format_dpdk_tx_offload_caps(u8 * s, va_list * args)
971 u32 bitmap = va_arg (*args, u32);
972 int next_split = _line_len;
973 int indent = format_get_indent (s);
975 return format(s, "none");
977 foreach_dpdk_tx_offload_caps
985 static u8 * format_dpdk_device (u8 * s, va_list * args)
987 u32 dev_instance = va_arg (*args, u32);
988 int verbose = va_arg (*args, int);
989 dpdk_main_t * dm = &dpdk_main;
990 dpdk_device_t * xd = vec_elt_at_index (dm->devices, dev_instance);
991 uword indent = format_get_indent (s);
992 f64 now = vlib_time_now (dm->vlib_main);
994 dpdk_update_counters (xd, now);
995 dpdk_update_link_state (xd, now);
997 s = format (s, "%U\n%Ucarrier %U",
998 format_dpdk_device_type, xd->device_index,
999 format_white_space, indent + 2,
1000 format_dpdk_link_status, xd);
1002 if (verbose > 1 && xd->dev_type == VNET_DPDK_DEV_ETH)
1004 struct rte_eth_dev_info di;
1005 struct rte_pci_device * pci;
1006 struct rte_eth_rss_conf rss_conf;
1009 rss_conf.rss_key = 0;
1010 rte_eth_dev_info_get(xd->device_index, &di);
1011 rte_eth_dev_rss_hash_conf_get(xd->device_index, &rss_conf);
1015 s = format(s, "%Upci id: device %04x:%04x subsystem %04x:%04x\n"
1016 "%Upci address: %04x:%02x:%02x.%02x\n",
1017 format_white_space, indent + 2,
1018 pci->id.vendor_id, pci->id.device_id,
1019 pci->id.subsystem_vendor_id,
1020 pci->id.subsystem_device_id,
1021 format_white_space, indent + 2,
1022 pci->addr.domain, pci->addr.bus,
1023 pci->addr.devid, pci->addr.function);
1024 s = format(s, "%Umax rx packet len: %d\n",
1025 format_white_space, indent + 2, di.max_rx_pktlen);
1026 s = format(s, "%Upromiscuous: unicast %s all-multicast %s\n",
1027 format_white_space, indent + 2,
1028 rte_eth_promiscuous_get(xd->device_index) ? "on" : "off",
1029 rte_eth_promiscuous_get(xd->device_index) ? "on" : "off");
1030 vlan_off = rte_eth_dev_get_vlan_offload(xd->device_index);
1031 s = format(s, "%Uvlan offload: strip %s filter %s qinq %s\n",
1032 format_white_space, indent + 2,
1033 vlan_off & ETH_VLAN_STRIP_OFFLOAD ? "on" : "off",
1034 vlan_off & ETH_VLAN_FILTER_OFFLOAD ? "on" : "off",
1035 vlan_off & ETH_VLAN_EXTEND_OFFLOAD ? "on" : "off");
1036 s = format(s, "%Uqueue size (max): rx %d (%d) tx %d (%d)\n",
1037 format_white_space, indent + 2,
1038 xd->rx_q_used, di.max_rx_queues,
1039 xd->tx_q_used, di.max_tx_queues);
1040 s = format(s, "%Urx offload caps: %U\n",
1041 format_white_space, indent + 2,
1042 format_dpdk_rx_offload_caps, di.rx_offload_capa);
1043 s = format(s, "%Utx offload caps: %U\n",
1044 format_white_space, indent + 2,
1045 format_dpdk_tx_offload_caps, di.tx_offload_capa);
1046 s = format(s, "%Urss active: %U\n"
1047 "%Urss supported: %U\n",
1048 format_white_space, indent + 2,
1049 format_dpdk_rss_hf_name, rss_conf.rss_hf,
1050 format_white_space, indent + 2,
1051 format_dpdk_rss_hf_name, di.flow_type_rss_offloads);
1054 if (xd->cpu_socket > -1)
1055 s = format (s, "%Ucpu socket %d",
1056 format_white_space, indent + 2,
1059 /* $$$ MIB counters */
1063 if (xd->stats.V != 0) \
1064 s = format (s, "\n%U%-40U%16Ld", \
1065 format_white_space, indent + 2, \
1066 format_c_identifier, #N, xd->stats.V);
1068 foreach_dpdk_counter
1073 struct rte_eth_xstats * xstat;
1075 vec_foreach(xstat, xd->xstats)
1079 /* format_c_identifier don't like c strings inside vector */
1080 u8 * name = format(0,"%s", xstat->name);
1081 xs = format(xs, "\n%U%-38U%16Ld",
1082 format_white_space, indent + 4,
1083 format_c_identifier, name, xstat->value);
1090 s = format(s, "\n%Uextended stats:%v",
1091 format_white_space, indent + 2, xs);
1098 static u8 * format_dpdk_tx_dma_trace (u8 * s, va_list * va)
1100 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
1101 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
1102 CLIB_UNUSED (vnet_main_t * vnm) = vnet_get_main();
1103 dpdk_tx_dma_trace_t * t = va_arg (*va, dpdk_tx_dma_trace_t *);
1104 dpdk_main_t * dm = &dpdk_main;
1105 dpdk_device_t * xd = vec_elt_at_index (dm->devices, t->device_index);
1106 uword indent = format_get_indent (s);
1107 vnet_sw_interface_t * sw = vnet_get_sw_interface (vnm, xd->vlib_sw_if_index);
1109 s = format (s, "%U tx queue %d",
1110 format_vnet_sw_interface_name, vnm, sw,
1113 s = format (s, "\n%Ubuffer 0x%x: %U",
1114 format_white_space, indent,
1116 format_vlib_buffer, &t->buffer);
1118 s = format (s, "\n%U%U", format_white_space, indent,
1119 format_ethernet_header_with_length, t->buffer.pre_data,
1120 sizeof (t->buffer.pre_data));
1125 static void dpdk_clear_hw_interface_counters (u32 instance)
1127 dpdk_main_t * dm = &dpdk_main;
1128 dpdk_device_t * xd = vec_elt_at_index (dm->devices, instance);
1131 * DAW-FIXME: VMXNET3 device stop/start doesn't work,
1132 * therefore fake the stop in the dpdk driver by
1133 * silently dropping all of the incoming pkts instead of
1134 * stopping the driver / hardware.
1136 if (xd->admin_up != 0xff)
1138 rte_eth_stats_reset (xd->device_index);
1139 memset (&xd->last_stats, 0, sizeof (xd->last_stats));
1140 dpdk_update_counters (xd, vlib_time_now (dm->vlib_main));
1144 rte_eth_stats_reset (xd->device_index);
1145 memset(&xd->stats, 0, sizeof(xd->stats));
1146 memset (&xd->last_stats, 0, sizeof (xd->last_stats));
1148 rte_eth_xstats_reset(xd->device_index);
1152 kni_config_network_if(u8 port_id, u8 if_up)
1154 vnet_main_t * vnm = vnet_get_main();
1155 dpdk_main_t * dm = &dpdk_main;
1159 p = hash_get (dm->dpdk_device_by_kni_port_id, port_id);
1161 clib_warning("unknown interface");
1164 xd = vec_elt_at_index (dm->devices, p[0]);
1167 vnet_hw_interface_set_flags (vnm, xd->vlib_hw_if_index,
1168 if_up ? VNET_HW_INTERFACE_FLAG_LINK_UP |
1169 ETH_LINK_FULL_DUPLEX : 0);
1174 kni_change_mtu(u8 port_id, unsigned new_mtu)
1176 vnet_main_t * vnm = vnet_get_main();
1177 dpdk_main_t * dm = &dpdk_main;
1180 vnet_hw_interface_t * hif;
1182 p = hash_get (dm->dpdk_device_by_kni_port_id, port_id);
1184 clib_warning("unknown interface");
1187 xd = vec_elt_at_index (dm->devices, p[0]);
1189 hif = vnet_get_hw_interface (vnm, xd->vlib_hw_if_index);
1191 hif->max_packet_bytes = new_mtu;
1196 static clib_error_t *
1197 dpdk_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
1199 vnet_hw_interface_t * hif = vnet_get_hw_interface (vnm, hw_if_index);
1200 uword is_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
1201 dpdk_main_t * dm = &dpdk_main;
1202 dpdk_device_t * xd = vec_elt_at_index (dm->devices, hif->dev_instance);
1205 if (xd->dev_type == VNET_DPDK_DEV_KNI)
1209 struct rte_kni_conf conf;
1210 struct rte_kni_ops ops;
1211 vlib_main_t * vm = vlib_get_main();
1212 vlib_buffer_main_t * bm = vm->buffer_main;
1213 memset(&conf, 0, sizeof(conf));
1214 snprintf(conf.name, RTE_KNI_NAMESIZE, "vpp%u", xd->kni_port_id);
1215 conf.mbuf_size = MBUF_SIZE;
1216 memset(&ops, 0, sizeof(ops));
1217 ops.port_id = xd->kni_port_id;
1218 ops.change_mtu = kni_change_mtu;
1219 ops.config_network_if = kni_config_network_if;
1221 xd->kni = rte_kni_alloc(bm->pktmbuf_pools[rte_socket_id()], &conf, &ops);
1224 clib_warning("failed to allocate kni interface");
1228 hif->max_packet_bytes = 1500; /* kni interface default value */
1235 rte_kni_release(xd->kni);
1239 if (xd->dev_type == VNET_DPDK_DEV_VHOST_USER)
1243 if (xd->vu_is_running)
1244 vnet_hw_interface_set_flags (vnm, xd->vlib_hw_if_index,
1245 VNET_HW_INTERFACE_FLAG_LINK_UP |
1246 ETH_LINK_FULL_DUPLEX );
1251 vnet_hw_interface_set_flags (vnm, xd->vlib_hw_if_index, 0);
1261 f64 now = vlib_time_now (dm->vlib_main);
1264 * DAW-FIXME: VMXNET3 device stop/start doesn't work,
1265 * therefore fake the stop in the dpdk driver by
1266 * silently dropping all of the incoming pkts instead of
1267 * stopping the driver / hardware.
1269 if (xd->admin_up == 0)
1270 rv = rte_eth_dev_start (xd->device_index);
1273 rte_eth_promiscuous_enable(xd->device_index);
1275 rte_eth_promiscuous_disable(xd->device_index);
1277 rte_eth_allmulticast_enable (xd->device_index);
1279 dpdk_update_counters (xd, now);
1280 dpdk_update_link_state (xd, now);
1284 rte_eth_allmulticast_disable (xd->device_index);
1285 vnet_hw_interface_set_flags (vnm, xd->vlib_hw_if_index, 0);
1288 * DAW-FIXME: VMXNET3 device stop/start doesn't work,
1289 * therefore fake the stop in the dpdk driver by
1290 * silently dropping all of the incoming pkts instead of
1291 * stopping the driver / hardware.
1293 if (xd->pmd != VNET_DPDK_PMD_VMXNET3)
1295 rte_eth_dev_stop (xd->device_index);
1303 clib_warning ("rte_eth_dev_%s error: %d", is_up ? "start" : "stop",
1306 return /* no error */ 0;
1310 * Dynamically redirect all pkts from a specific interface
1311 * to the specified node
1313 static void dpdk_set_interface_next_node (vnet_main_t *vnm, u32 hw_if_index,
1316 dpdk_main_t * xm = &dpdk_main;
1317 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
1318 dpdk_device_t * xd = vec_elt_at_index (xm->devices, hw->dev_instance);
1320 /* Shut off redirection */
1321 if (node_index == ~0)
1323 xd->per_interface_next_index = node_index;
1327 xd->per_interface_next_index =
1328 vlib_node_add_next (xm->vlib_main, dpdk_input_node.index, node_index);
1332 static clib_error_t *
1333 dpdk_subif_add_del_function (vnet_main_t * vnm,
1335 struct vnet_sw_interface_t * st,
1338 dpdk_main_t * xm = &dpdk_main;
1339 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
1340 dpdk_device_t * xd = vec_elt_at_index (xm->devices, hw->dev_instance);
1341 vnet_sw_interface_t * t = (vnet_sw_interface_t *) st;
1342 int r, vlan_offload;
1345 if (xd->dev_type != VNET_DPDK_DEV_ETH)
1347 /* currently we program VLANS only for IXGBE VF */
1348 if (xd->pmd != VNET_DPDK_PMD_IXGBEVF)
1351 if (t->sub.eth.flags.no_tags == 1)
1354 if ((t->sub.eth.flags.one_tag != 1) || (t->sub.eth.flags.exact_match != 1 ))
1355 return clib_error_return (0, "unsupported VLAN setup");
1358 vlan_offload = rte_eth_dev_get_vlan_offload(xd->device_index);
1359 vlan_offload |= ETH_VLAN_FILTER_OFFLOAD;
1361 if ((r = rte_eth_dev_set_vlan_offload(xd->device_index, vlan_offload)))
1362 return clib_error_return (0, "rte_eth_dev_set_vlan_offload[%d]: err %d",
1363 xd->device_index, r);
1366 if ((r = rte_eth_dev_vlan_filter(xd->device_index, t->sub.eth.outer_vlan_id, is_add)))
1367 return clib_error_return (0, "rte_eth_dev_vlan_filter[%d]: err %d",
1368 xd->device_index, r);
1373 VNET_DEVICE_CLASS (dpdk_device_class) = {
1375 .tx_function = dpdk_interface_tx,
1376 .tx_function_n_errors = DPDK_TX_FUNC_N_ERROR,
1377 .tx_function_error_strings = dpdk_tx_func_error_strings,
1378 .format_device_name = format_dpdk_device_name,
1379 .format_device = format_dpdk_device,
1380 .format_tx_trace = format_dpdk_tx_dma_trace,
1381 .clear_counters = dpdk_clear_hw_interface_counters,
1382 .admin_up_down_function = dpdk_interface_admin_up_down,
1383 .subif_add_del_function = dpdk_subif_add_del_function,
1384 .rx_redirect_to_node = dpdk_set_interface_next_node,
1385 .no_flatten_output_chains = 1,
1386 .name_renumber = dpdk_device_renumber,
1389 void dpdk_set_flowcontrol_callback (vlib_main_t *vm,
1390 dpdk_flowcontrol_callback_t callback)
1392 dpdk_main.flowcontrol_callback = callback;
1395 #define UP_DOWN_FLAG_EVENT 1
1398 u32 dpdk_get_admin_up_down_in_progress (void)
1400 return dpdk_main.admin_up_down_in_progress;
1404 admin_up_down_process (vlib_main_t * vm,
1405 vlib_node_runtime_t * rt,
1408 clib_error_t * error = 0;
1410 uword *event_data = 0;
1417 vlib_process_wait_for_event (vm);
1419 event_type = vlib_process_get_events (vm, &event_data);
1421 dpdk_main.admin_up_down_in_progress = 1;
1423 for (index=0; index<vec_len(event_data); index++)
1425 sw_if_index = event_data[index] >> 32;
1426 flags = (u32) event_data[index];
1428 switch (event_type) {
1429 case UP_DOWN_FLAG_EVENT:
1430 error = vnet_sw_interface_set_flags (vnet_get_main(), sw_if_index, flags);
1431 clib_error_report(error);
1436 vec_reset_length (event_data);
1438 dpdk_main.admin_up_down_in_progress = 0;
1441 return 0; /* or not */
1444 VLIB_REGISTER_NODE (admin_up_down_process_node,static) = {
1445 .function = admin_up_down_process,
1446 .type = VLIB_NODE_TYPE_PROCESS,
1447 .name = "admin-up-down-process",
1448 .process_log2_n_stack_bytes = 17, // 256KB
1452 * Asynchronously invoke vnet_sw_interface_set_flags via the admin_up_down
1453 * process. Useful for avoiding long blocking delays (>150ms) in the dpdk
1455 * WARNING: when posting this event, no other interface-related calls should
1456 * be made (e.g. vnet_create_sw_interface()) while the event is being
1457 * processed (admin_up_down_in_progress). This is required in order to avoid
1458 * race conditions in manipulating interface data structures.
1460 void post_sw_interface_set_flags (vlib_main_t *vm, u32 sw_if_index, u32 flags)
1462 vlib_process_signal_event
1463 (vm, admin_up_down_process_node.index,
1465 (((uword)sw_if_index << 32) | flags));
1469 * Called by the dpdk driver's rte_delay_us() function.
1470 * Return 0 to have the dpdk do a regular delay loop.
1471 * Return 1 if to skip the delay loop because we are suspending
1472 * the calling vlib process instead.
1474 int rte_delay_us_override (unsigned us) {
1477 /* Don't bother intercepting for short delays */
1478 if (us < 10) return 0;
1481 * Only intercept if we are in a vlib process.
1482 * If we are called from a vlib worker thread or the vlib main
1483 * thread then do not intercept. (Must not be called from an
1484 * independent pthread).
1486 if (os_get_cpu_number() == 0)
1489 * We're in the vlib main thread or a vlib process. Make sure
1490 * the process is running and we're not still initializing.
1492 vm = vlib_get_main();
1493 if (vlib_in_process_context(vm))
1495 /* Only suspend for the admin_down_process */
1496 vlib_process_t * proc = vlib_get_current_process(vm);
1497 if (!(proc->flags & VLIB_PROCESS_IS_RUNNING) ||
1498 (proc->node_runtime.function != admin_up_down_process))
1501 f64 delay = 1e-6 * us;
1502 vlib_process_suspend(vm, delay);
1506 return 0; // no override