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/error.h>
18 #include <vppinfra/format.h>
19 #include <vppinfra/xxhash.h>
21 #include <vnet/ethernet/ethernet.h>
22 #include <vnet/devices/dpdk/dpdk.h>
23 #include <vnet/classify/vnet_classify.h>
24 #include <vnet/mpls/packet.h>
25 #include <vnet/handoff.h>
26 #include <vnet/devices/devices.h>
27 #include <vnet/feature/feature.h>
29 #include "dpdk_priv.h"
32 #define MAX(a,b) ((a) < (b) ? (b) : (a))
36 #define MIN(a,b) ((a) < (b) ? (a) : (b))
40 * At least in certain versions of ESXi, vmware e1000's don't honor the
41 * "strip rx CRC" bit. Set this flag to work around that bug FOR UNIT TEST ONLY.
43 * If wireshark complains like so:
45 * "Frame check sequence: 0x00000000 [incorrect, should be <hex-num>]"
46 * and you're using ESXi emulated e1000's, set this flag FOR UNIT TEST ONLY.
48 * Note: do NOT check in this file with this workaround enabled! You'll lose
49 * actual data from e.g. 10xGE interfaces. The extra 4 bytes annoy
50 * wireshark, but they're harmless...
52 #define VMWARE_LENGTH_BUG_WORKAROUND 0
54 static char *dpdk_error_strings[] = {
61 dpdk_mbuf_is_ip4 (struct rte_mbuf *mb)
63 return RTE_ETH_IS_IPV4_HDR (mb->packet_type) != 0;
67 dpdk_mbuf_is_ip6 (struct rte_mbuf *mb)
69 return RTE_ETH_IS_IPV6_HDR (mb->packet_type) != 0;
73 vlib_buffer_is_mpls (vlib_buffer_t * b)
75 ethernet_header_t *h = (ethernet_header_t *) b->data;
76 return (h->type == clib_host_to_net_u16 (ETHERNET_TYPE_MPLS_UNICAST));
80 dpdk_rx_next_and_error_from_mb_flags_x1 (dpdk_device_t * xd,
82 vlib_buffer_t * b0, u32 * next0,
86 uint16_t mb_flags = mb->ol_flags;
88 if (PREDICT_FALSE (mb_flags & (
89 #ifdef RTE_LIBRTE_MBUF_EXT_RX_OLFLAGS
90 PKT_EXT_RX_PKT_ERROR | PKT_EXT_RX_BAD_FCS |
91 #endif /* RTE_LIBRTE_MBUF_EXT_RX_OLFLAGS */
92 PKT_RX_IP_CKSUM_BAD | PKT_RX_L4_CKSUM_BAD)))
94 /* some error was flagged. determine the drop reason */
95 n0 = VNET_DEVICE_INPUT_NEXT_DROP;
97 #ifdef RTE_LIBRTE_MBUF_EXT_RX_OLFLAGS
98 (mb_flags & PKT_EXT_RX_PKT_ERROR) ? DPDK_ERROR_RX_PACKET_ERROR :
99 (mb_flags & PKT_EXT_RX_BAD_FCS) ? DPDK_ERROR_RX_BAD_FCS :
100 #endif /* RTE_LIBRTE_MBUF_EXT_RX_OLFLAGS */
101 (mb_flags & PKT_RX_IP_CKSUM_BAD) ? DPDK_ERROR_IP_CHECKSUM_ERROR :
102 (mb_flags & PKT_RX_L4_CKSUM_BAD) ? DPDK_ERROR_L4_CHECKSUM_ERROR :
107 *error0 = DPDK_ERROR_NONE;
108 if (PREDICT_FALSE (xd->per_interface_next_index != ~0))
110 n0 = xd->per_interface_next_index;
111 b0->flags |= BUFFER_HANDOFF_NEXT_VALID;
112 if (PREDICT_TRUE (dpdk_mbuf_is_ip4 (mb)))
113 vnet_buffer (b0)->handoff.next_index =
114 HANDOFF_DISPATCH_NEXT_IP4_INPUT;
115 else if (PREDICT_TRUE (dpdk_mbuf_is_ip6 (mb)))
116 vnet_buffer (b0)->handoff.next_index =
117 HANDOFF_DISPATCH_NEXT_IP6_INPUT;
118 else if (PREDICT_TRUE (vlib_buffer_is_mpls (b0)))
119 vnet_buffer (b0)->handoff.next_index =
120 HANDOFF_DISPATCH_NEXT_MPLS_INPUT;
122 vnet_buffer (b0)->handoff.next_index =
123 HANDOFF_DISPATCH_NEXT_ETHERNET_INPUT;
126 if (PREDICT_FALSE ((xd->flags & DPDK_DEVICE_FLAG_HAVE_SUBIF) ||
127 (mb_flags & PKT_RX_VLAN_PKT)))
128 n0 = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
131 if (PREDICT_TRUE (dpdk_mbuf_is_ip4 (mb)))
132 n0 = VNET_DEVICE_INPUT_NEXT_IP4_INPUT;
133 else if (PREDICT_TRUE (dpdk_mbuf_is_ip6 (mb)))
134 n0 = VNET_DEVICE_INPUT_NEXT_IP6_INPUT;
135 else if (PREDICT_TRUE (vlib_buffer_is_mpls (b0)))
136 n0 = VNET_DEVICE_INPUT_NEXT_MPLS_INPUT;
138 n0 = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
145 dpdk_rx_trace (dpdk_main_t * dm,
146 vlib_node_runtime_t * node,
148 u16 queue_id, u32 * buffers, uword n_buffers)
150 vlib_main_t *vm = vlib_get_main ();
161 dpdk_rx_dma_trace_t *t0;
168 b0 = vlib_get_buffer (vm, bi0);
169 mb = rte_mbuf_from_vlib_buffer (b0);
170 dpdk_rx_next_and_error_from_mb_flags_x1 (xd, mb, b0, &next0, &error0);
171 vlib_trace_buffer (vm, node, next0, b0, /* follow_chain */ 0);
172 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
173 t0->queue_index = queue_id;
174 t0->device_index = xd->device_index;
175 t0->buffer_index = bi0;
177 clib_memcpy (&t0->mb, mb, sizeof (t0->mb));
178 clib_memcpy (&t0->buffer, b0, sizeof (b0[0]) - sizeof (b0->pre_data));
179 clib_memcpy (t0->buffer.pre_data, b0->data,
180 sizeof (t0->buffer.pre_data));
181 clib_memcpy (&t0->data, mb->buf_addr + mb->data_off, sizeof (t0->data));
183 #ifdef RTE_LIBRTE_MBUF_EXT_RX_OLFLAGS
185 * Clear overloaded TX offload flags when a DPDK driver
186 * is using them for RX flags (e.g. Cisco VIC Ethernet driver)
188 mb->ol_flags &= PKT_EXT_RX_CLR_TX_FLAGS_MASK;
189 #endif /* RTE_LIBRTE_MBUF_EXT_RX_OLFLAGS */
196 * dpdk_efd_update_counters()
197 * Update EFD (early-fast-discard) counters
200 dpdk_efd_update_counters (dpdk_device_t * xd, u32 n_buffers, u16 enabled)
202 if (enabled & DPDK_EFD_MONITOR_ENABLED)
204 u64 now = clib_cpu_time_now ();
205 if (xd->efd_agent.last_poll_time > 0)
207 u64 elapsed_time = (now - xd->efd_agent.last_poll_time);
208 if (elapsed_time > xd->efd_agent.max_poll_delay)
209 xd->efd_agent.max_poll_delay = elapsed_time;
211 xd->efd_agent.last_poll_time = now;
214 xd->efd_agent.total_packet_cnt += n_buffers;
215 xd->efd_agent.last_burst_sz = n_buffers;
217 if (n_buffers > xd->efd_agent.max_burst_sz)
218 xd->efd_agent.max_burst_sz = n_buffers;
220 if (PREDICT_FALSE (n_buffers == VLIB_FRAME_SIZE))
222 xd->efd_agent.full_frames_cnt++;
223 xd->efd_agent.consec_full_frames_cnt++;
227 xd->efd_agent.consec_full_frames_cnt = 0;
231 /* is_efd_discardable()
232 * returns non zero DPDK error if packet meets early-fast-discard criteria,
236 is_efd_discardable (vlib_thread_main_t * tm,
237 vlib_buffer_t * b0, struct rte_mbuf *mb)
239 ethernet_header_t *eh = (ethernet_header_t *) b0->data;
241 if (eh->type == clib_host_to_net_u16 (ETHERNET_TYPE_IP4))
244 (ip4_header_t *) & (b0->data[sizeof (ethernet_header_t)]);
245 u8 pkt_prec = (ipv4->tos >> 5);
247 return (tm->efd.ip_prec_bitmap & (1 << pkt_prec) ?
248 DPDK_ERROR_IPV4_EFD_DROP_PKTS : DPDK_ERROR_NONE);
250 else if (eh->type == clib_net_to_host_u16 (ETHERNET_TYPE_IP6))
253 (ip6_header_t *) & (b0->data[sizeof (ethernet_header_t)]);
255 ((ipv6->ip_version_traffic_class_and_flow_label >> 20) & 0xff);
257 return (tm->efd.ip_prec_bitmap & (1 << pkt_tclass) ?
258 DPDK_ERROR_IPV6_EFD_DROP_PKTS : DPDK_ERROR_NONE);
260 else if (eh->type == clib_net_to_host_u16 (ETHERNET_TYPE_MPLS_UNICAST))
262 mpls_unicast_header_t *mpls =
263 (mpls_unicast_header_t *) & (b0->data[sizeof (ethernet_header_t)]);
264 u8 pkt_exp = ((mpls->label_exp_s_ttl >> 9) & 0x07);
266 return (tm->efd.mpls_exp_bitmap & (1 << pkt_exp) ?
267 DPDK_ERROR_MPLS_EFD_DROP_PKTS : DPDK_ERROR_NONE);
269 else if ((eh->type == clib_net_to_host_u16 (ETHERNET_TYPE_VLAN)) ||
270 (eh->type == clib_net_to_host_u16 (ETHERNET_TYPE_DOT1AD)))
272 ethernet_vlan_header_t *vlan =
273 (ethernet_vlan_header_t *) & (b0->data[sizeof (ethernet_header_t)]);
274 u8 pkt_cos = ((vlan->priority_cfi_and_id >> 13) & 0x07);
276 return (tm->efd.vlan_cos_bitmap & (1 << pkt_cos) ?
277 DPDK_ERROR_VLAN_EFD_DROP_PKTS : DPDK_ERROR_NONE);
280 return DPDK_ERROR_NONE;
284 dpdk_rx_burst (dpdk_main_t * dm, dpdk_device_t * xd, u16 queue_id)
290 n_left = VLIB_FRAME_SIZE;
293 if (PREDICT_TRUE (xd->flags & DPDK_DEVICE_FLAG_PMD))
297 n_this_chunk = rte_eth_rx_burst (xd->device_index, queue_id,
298 xd->rx_vectors[queue_id] +
300 n_buffers += n_this_chunk;
301 n_left -= n_this_chunk;
303 /* Empirically, DPDK r1.8 produces vectors w/ 32 or fewer elts */
304 if (n_this_chunk < 32)
317 * This function is used when there are no worker threads.
318 * The main thread performs IO and forwards the packets.
321 dpdk_device_input (dpdk_main_t * dm,
323 vlib_node_runtime_t * node,
324 u32 cpu_index, u16 queue_id, int use_efd)
327 u32 next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
328 u32 n_left_to_next, *to_next;
330 vlib_main_t *vm = vlib_get_main ();
331 uword n_rx_bytes = 0;
332 u32 n_trace, trace_cnt __attribute__ ((unused));
333 vlib_buffer_free_list_t *fl;
334 u8 efd_discard_burst = 0;
335 u32 buffer_flags_template;
337 if ((xd->flags & DPDK_DEVICE_FLAG_ADMIN_UP) == 0)
340 n_buffers = dpdk_rx_burst (dm, xd, queue_id);
344 /* check if EFD (dpdk) is enabled */
345 if (PREDICT_FALSE (use_efd && dm->efd.enabled))
347 /* reset a few stats */
348 xd->efd_agent.last_poll_time = 0;
349 xd->efd_agent.last_burst_sz = 0;
354 buffer_flags_template = dm->buffer_flags_template;
356 vec_reset_length (xd->d_trace_buffers);
357 trace_cnt = n_trace = vlib_get_trace_count (vm, node);
359 fl = vlib_buffer_get_free_list (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
361 /* Check for congestion if EFD (Early-Fast-Discard) is enabled
362 * in any mode (e.g. dpdk, monitor, or drop_all)
364 if (PREDICT_FALSE (use_efd && dm->efd.enabled))
366 /* update EFD counters */
367 dpdk_efd_update_counters (xd, n_buffers, dm->efd.enabled);
369 if (PREDICT_FALSE (dm->efd.enabled & DPDK_EFD_DROPALL_ENABLED))
371 /* discard all received packets */
372 for (mb_index = 0; mb_index < n_buffers; mb_index++)
373 rte_pktmbuf_free (xd->rx_vectors[queue_id][mb_index]);
375 xd->efd_agent.discard_cnt += n_buffers;
376 increment_efd_drop_counter (vm,
377 DPDK_ERROR_VLAN_EFD_DROP_PKTS,
383 if (PREDICT_FALSE (xd->efd_agent.consec_full_frames_cnt >=
384 dm->efd.consec_full_frames_hi_thresh))
386 u32 device_queue_sz = rte_eth_rx_queue_count (xd->device_index,
388 if (device_queue_sz >= dm->efd.queue_hi_thresh)
390 /* dpdk device queue has reached the critical threshold */
391 xd->efd_agent.congestion_cnt++;
393 /* apply EFD to packets from the burst */
394 efd_discard_burst = 1;
401 while (n_buffers > 0)
406 vlib_buffer_t *b0, *b_seg, *b_chain = 0;
409 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
411 while (n_buffers > 0 && n_left_to_next > 0)
414 struct rte_mbuf *mb = xd->rx_vectors[queue_id][mb_index];
415 struct rte_mbuf *mb_seg = mb->next;
417 if (PREDICT_TRUE (n_buffers > 2))
419 struct rte_mbuf *pfmb = xd->rx_vectors[queue_id][mb_index + 2];
420 vlib_buffer_t *bp = vlib_buffer_from_rte_mbuf (pfmb);
421 CLIB_PREFETCH (pfmb, CLIB_CACHE_LINE_BYTES, STORE);
422 CLIB_PREFETCH (bp, CLIB_CACHE_LINE_BYTES, STORE);
427 b0 = vlib_buffer_from_rte_mbuf (mb);
429 /* check whether EFD is looking for packets to discard */
430 if (PREDICT_FALSE (efd_discard_burst))
432 vlib_thread_main_t *tm = vlib_get_thread_main ();
434 if (PREDICT_TRUE (cntr_type = is_efd_discardable (tm, b0, mb)))
436 rte_pktmbuf_free (mb);
437 xd->efd_agent.discard_cnt++;
438 increment_efd_drop_counter (vm, cntr_type, 1);
445 /* Prefetch one next segment if it exists. */
446 if (PREDICT_FALSE (mb->nb_segs > 1))
448 struct rte_mbuf *pfmb = mb->next;
449 vlib_buffer_t *bp = vlib_buffer_from_rte_mbuf (pfmb);
450 CLIB_PREFETCH (pfmb, CLIB_CACHE_LINE_BYTES, LOAD);
451 CLIB_PREFETCH (bp, CLIB_CACHE_LINE_BYTES, STORE);
455 vlib_buffer_init_for_free_list (b0, fl);
457 bi0 = vlib_get_buffer_index (vm, b0);
463 dpdk_rx_next_and_error_from_mb_flags_x1 (xd, mb, b0,
465 #ifdef RTE_LIBRTE_MBUF_EXT_RX_OLFLAGS
467 * Clear overloaded TX offload flags when a DPDK driver
468 * is using them for RX flags (e.g. Cisco VIC Ethernet driver)
471 if (PREDICT_TRUE (trace_cnt == 0))
472 mb->ol_flags &= PKT_EXT_RX_CLR_TX_FLAGS_MASK;
475 #endif /* RTE_LIBRTE_MBUF_EXT_RX_OLFLAGS */
477 b0->error = node->errors[error0];
479 l3_offset0 = ((next0 == VNET_DEVICE_INPUT_NEXT_IP4_INPUT ||
480 next0 == VNET_DEVICE_INPUT_NEXT_IP6_INPUT ||
481 next0 == VNET_DEVICE_INPUT_NEXT_MPLS_INPUT) ?
482 sizeof (ethernet_header_t) : 0);
484 b0->current_data = l3_offset0;
485 /* Some drivers like fm10k receive frames with
486 mb->data_off > RTE_PKTMBUF_HEADROOM */
487 b0->current_data += mb->data_off - RTE_PKTMBUF_HEADROOM;
488 b0->current_length = mb->data_len - l3_offset0;
490 b0->flags = buffer_flags_template;
492 if (VMWARE_LENGTH_BUG_WORKAROUND)
493 b0->current_length -= 4;
495 vnet_buffer (b0)->sw_if_index[VLIB_RX] = xd->vlib_sw_if_index;
496 vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
497 n_rx_bytes += mb->pkt_len;
499 /* Process subsequent segments of multi-segment packets */
500 while ((mb->nb_segs > 1) && (nb_seg < mb->nb_segs))
502 ASSERT (mb_seg != 0);
504 b_seg = vlib_buffer_from_rte_mbuf (mb_seg);
505 vlib_buffer_init_for_free_list (b_seg, fl);
507 ASSERT ((b_seg->flags & VLIB_BUFFER_NEXT_PRESENT) == 0);
508 ASSERT (b_seg->current_data == 0);
511 * The driver (e.g. virtio) may not put the packet data at the start
512 * of the segment, so don't assume b_seg->current_data == 0 is correct.
514 b_seg->current_data =
515 (mb_seg->buf_addr + mb_seg->data_off) - (void *) b_seg->data;
517 b_seg->current_length = mb_seg->data_len;
518 b0->total_length_not_including_first_buffer += mb_seg->data_len;
520 b_chain->flags |= VLIB_BUFFER_NEXT_PRESENT;
521 b_chain->next_buffer = vlib_get_buffer_index (vm, b_seg);
524 mb_seg = mb_seg->next;
529 * Turn this on if you run into
530 * "bad monkey" contexts, and you want to know exactly
531 * which nodes they've visited... See main.c...
533 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
535 /* Do we have any driver RX features configured on the interface? */
536 vnet_feature_device_input_redirect_x1 (node, xd->vlib_sw_if_index, &next0, b0, l3_offset0);
538 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
539 to_next, n_left_to_next,
541 if (PREDICT_FALSE (n_trace > mb_index))
542 vec_add1 (xd->d_trace_buffers, bi0);
546 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
549 if (PREDICT_FALSE (vec_len (xd->d_trace_buffers) > 0))
551 dpdk_rx_trace (dm, node, xd, queue_id, xd->d_trace_buffers,
552 vec_len (xd->d_trace_buffers));
553 vlib_set_trace_count (vm, node,
554 n_trace - vec_len (xd->d_trace_buffers));
557 vlib_increment_combined_counter
558 (vnet_get_main ()->interface_main.combined_sw_if_counters
559 + VNET_INTERFACE_COUNTER_RX,
560 cpu_index, xd->vlib_sw_if_index, mb_index, n_rx_bytes);
562 dpdk_worker_t *dw = vec_elt_at_index (dm->workers, cpu_index);
563 dw->aggregate_rx_packets += mb_index;
569 poll_rate_limit (dpdk_main_t * dm)
571 /* Limit the poll rate by sleeping for N msec between polls */
572 if (PREDICT_FALSE (dm->poll_sleep != 0))
574 struct timespec ts, tsrem;
577 ts.tv_nsec = 1000 * 1000 * dm->poll_sleep; /* 1ms */
579 while (nanosleep (&ts, &tsrem) < 0)
586 /** \brief Main DPDK input node
589 This is the main DPDK input node: across each assigned interface,
590 call rte_eth_rx_burst(...) or similar to obtain a vector of
591 packets to process. Handle early packet discard. Derive @c
592 vlib_buffer_t metadata from <code>struct rte_mbuf</code> metadata,
593 Depending on the resulting metadata: adjust <code>b->current_data,
594 b->current_length </code> and dispatch directly to
595 ip4-input-no-checksum, or ip6-input. Trace the packet if required.
597 @param vm vlib_main_t corresponding to the current thread
598 @param node vlib_node_runtime_t
599 @param f vlib_frame_t input-node, not used.
601 @par Graph mechanics: buffer metadata, next index usage
604 - <code>struct rte_mbuf mb->ol_flags</code>
605 - PKT_EXT_RX_PKT_ERROR, PKT_EXT_RX_BAD_FCS
606 PKT_RX_IP_CKSUM_BAD, PKT_RX_L4_CKSUM_BAD
607 - <code> RTE_ETH_IS_xxx_HDR(mb->packet_type) </code>
608 - packet classification result
611 - <code>b->error</code> if the packet is to be dropped immediately
612 - <code>b->current_data, b->current_length</code>
613 - adjusted as needed to skip the L2 header in direct-dispatch cases
614 - <code>vnet_buffer(b)->sw_if_index[VLIB_RX]</code>
615 - rx interface sw_if_index
616 - <code>vnet_buffer(b)->sw_if_index[VLIB_TX] = ~0</code>
617 - required by ipX-lookup
618 - <code>b->flags</code>
619 - to indicate multi-segment pkts (VLIB_BUFFER_NEXT_PRESENT), etc.
622 - Static arcs to: error-drop, ethernet-input,
623 ip4-input-no-checksum, ip6-input, mpls-input
624 - per-interface redirection, controlled by
625 <code>xd->per_interface_next_index</code>
629 dpdk_input (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * f)
631 dpdk_main_t *dm = &dpdk_main;
633 uword n_rx_packets = 0;
634 dpdk_device_and_queue_t *dq;
635 u32 cpu_index = os_get_cpu_number ();
638 * Poll all devices on this cpu for input/interrupts.
641 vec_foreach (dq, dm->devices_by_cpu[cpu_index])
643 xd = vec_elt_at_index(dm->devices, dq->device);
644 ASSERT(dq->queue_id == 0);
645 n_rx_packets += dpdk_device_input (dm, xd, node, cpu_index, 0, 0);
649 poll_rate_limit (dm);
655 dpdk_input_rss (vlib_main_t * vm,
656 vlib_node_runtime_t * node, vlib_frame_t * f)
658 dpdk_main_t *dm = &dpdk_main;
660 uword n_rx_packets = 0;
661 dpdk_device_and_queue_t *dq;
662 u32 cpu_index = os_get_cpu_number ();
665 * Poll all devices on this cpu for input/interrupts.
668 vec_foreach (dq, dm->devices_by_cpu[cpu_index])
670 xd = vec_elt_at_index(dm->devices, dq->device);
671 n_rx_packets += dpdk_device_input (dm, xd, node, cpu_index, dq->queue_id, 0);
675 poll_rate_limit (dm);
681 dpdk_input_efd (vlib_main_t * vm,
682 vlib_node_runtime_t * node, vlib_frame_t * f)
684 dpdk_main_t *dm = &dpdk_main;
686 uword n_rx_packets = 0;
687 dpdk_device_and_queue_t *dq;
688 u32 cpu_index = os_get_cpu_number ();
691 * Poll all devices on this cpu for input/interrupts.
694 vec_foreach (dq, dm->devices_by_cpu[cpu_index])
696 xd = vec_elt_at_index(dm->devices, dq->device);
697 n_rx_packets += dpdk_device_input (dm, xd, node, cpu_index, dq->queue_id, 1);
701 poll_rate_limit (dm);
707 VLIB_REGISTER_NODE (dpdk_input_node) = {
708 .function = dpdk_input,
709 .type = VLIB_NODE_TYPE_INPUT,
710 .name = "dpdk-input",
712 /* Will be enabled if/when hardware is detected. */
713 .state = VLIB_NODE_STATE_DISABLED,
715 .format_buffer = format_ethernet_header_with_length,
716 .format_trace = format_dpdk_rx_dma_trace,
718 .n_errors = DPDK_N_ERROR,
719 .error_strings = dpdk_error_strings,
721 .n_next_nodes = VNET_DEVICE_INPUT_N_NEXT_NODES,
722 .next_nodes = VNET_DEVICE_INPUT_NEXT_NODES,
726 /* handle dpdk_input_rss alternative function */
727 VLIB_NODE_FUNCTION_MULTIARCH_CLONE(dpdk_input)
728 VLIB_NODE_FUNCTION_MULTIARCH_CLONE(dpdk_input_rss)
729 VLIB_NODE_FUNCTION_MULTIARCH_CLONE(dpdk_input_efd)
731 /* this macro defines dpdk_input_rss_multiarch_select() */
732 CLIB_MULTIARCH_SELECT_FN(dpdk_input);
733 CLIB_MULTIARCH_SELECT_FN(dpdk_input_rss);
734 CLIB_MULTIARCH_SELECT_FN(dpdk_input_efd);
738 * Based on the operation type, set lower/upper bits for the given index value
741 set_efd_bitmap (u8 * bitmap, u32 value, u32 op)
746 for (ix = 0; ix < 8; ix++)
748 if (((op == EFD_OPERATION_LESS_THAN) && (ix < value)) ||
749 ((op == EFD_OPERATION_GREATER_OR_EQUAL) && (ix >= value)))
751 (*bitmap) |= (1 << ix);
757 efd_config (u32 enabled,
758 u32 ip_prec, u32 ip_op,
759 u32 mpls_exp, u32 mpls_op, u32 vlan_cos, u32 vlan_op)
761 vlib_thread_main_t *tm = vlib_get_thread_main ();
762 dpdk_main_t *dm = &dpdk_main;
766 tm->efd.enabled |= VLIB_EFD_DISCARD_ENABLED;
767 dm->efd.enabled |= DPDK_EFD_DISCARD_ENABLED;
771 tm->efd.enabled &= ~VLIB_EFD_DISCARD_ENABLED;
772 dm->efd.enabled &= ~DPDK_EFD_DISCARD_ENABLED;
775 set_efd_bitmap (&tm->efd.ip_prec_bitmap, ip_prec, ip_op);
776 set_efd_bitmap (&tm->efd.mpls_exp_bitmap, mpls_exp, mpls_op);
777 set_efd_bitmap (&tm->efd.vlan_cos_bitmap, vlan_cos, vlan_op);