1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2014 Intel Corporation.
3 * Copyright 2014 6WIND S.A.
13 #include <sys/queue.h>
16 #include <rte_common.h>
17 #include <rte_byteorder.h>
19 #include <rte_debug.h>
20 #include <rte_cycles.h>
21 #include <rte_memory.h>
22 #include <rte_memcpy.h>
23 #include <rte_launch.h>
25 #include <rte_per_lcore.h>
26 #include <rte_lcore.h>
27 #include <rte_atomic.h>
28 #include <rte_branch_prediction.h>
29 #include <rte_mempool.h>
31 #include <rte_interrupts.h>
33 #include <rte_ether.h>
34 #include <rte_ethdev.h>
39 #include <rte_prefetch.h>
40 #include <rte_string_fns.h>
47 #define IP_DEFTTL 64 /* from RFC 1340. */
48 #define IP_VERSION 0x40
49 #define IP_HDRLEN 0x05 /* default IP header length == five 32-bits words. */
50 #define IP_VHL_DEF (IP_VERSION | IP_HDRLEN)
52 #define GRE_CHECKSUM_PRESENT 0x8000
53 #define GRE_KEY_PRESENT 0x2000
54 #define GRE_SEQUENCE_PRESENT 0x1000
56 #define GRE_SUPPORTED_FIELDS (GRE_CHECKSUM_PRESENT | GRE_KEY_PRESENT |\
59 /* We cannot use rte_cpu_to_be_16() on a constant in a switch/case */
60 #if RTE_BYTE_ORDER == RTE_LITTLE_ENDIAN
61 #define _htons(x) ((uint16_t)((((x) & 0x00ffU) << 8) | (((x) & 0xff00U) >> 8)))
66 uint16_t vxlan_gpe_udp_port = 4790;
68 /* structure that caches offload info for the current packet */
69 struct testpmd_offload_info {
77 uint16_t outer_ethertype;
78 uint16_t outer_l2_len;
79 uint16_t outer_l3_len;
80 uint8_t outer_l4_proto;
82 uint16_t tunnel_tso_segsz;
86 /* simplified GRE header */
87 struct simple_gre_hdr {
90 } __attribute__((__packed__));
93 get_udptcp_checksum(void *l3_hdr, void *l4_hdr, uint16_t ethertype)
95 if (ethertype == _htons(RTE_ETHER_TYPE_IPv4))
96 return rte_ipv4_udptcp_cksum(l3_hdr, l4_hdr);
97 else /* assume ethertype == RTE_ETHER_TYPE_IPv6 */
98 return rte_ipv6_udptcp_cksum(l3_hdr, l4_hdr);
101 /* Parse an IPv4 header to fill l3_len, l4_len, and l4_proto */
103 parse_ipv4(struct rte_ipv4_hdr *ipv4_hdr, struct testpmd_offload_info *info)
105 struct rte_tcp_hdr *tcp_hdr;
107 info->l3_len = (ipv4_hdr->version_ihl & 0x0f) * 4;
108 info->l4_proto = ipv4_hdr->next_proto_id;
110 /* only fill l4_len for TCP, it's useful for TSO */
111 if (info->l4_proto == IPPROTO_TCP) {
112 tcp_hdr = (struct rte_tcp_hdr *)
113 ((char *)ipv4_hdr + info->l3_len);
114 info->l4_len = (tcp_hdr->data_off & 0xf0) >> 2;
115 } else if (info->l4_proto == IPPROTO_UDP)
116 info->l4_len = sizeof(struct udp_hdr);
121 /* Parse an IPv6 header to fill l3_len, l4_len, and l4_proto */
123 parse_ipv6(struct rte_ipv6_hdr *ipv6_hdr, struct testpmd_offload_info *info)
125 struct rte_tcp_hdr *tcp_hdr;
127 info->l3_len = sizeof(struct rte_ipv6_hdr);
128 info->l4_proto = ipv6_hdr->proto;
130 /* only fill l4_len for TCP, it's useful for TSO */
131 if (info->l4_proto == IPPROTO_TCP) {
132 tcp_hdr = (struct rte_tcp_hdr *)
133 ((char *)ipv6_hdr + info->l3_len);
134 info->l4_len = (tcp_hdr->data_off & 0xf0) >> 2;
135 } else if (info->l4_proto == IPPROTO_UDP)
136 info->l4_len = sizeof(struct udp_hdr);
142 * Parse an ethernet header to fill the ethertype, l2_len, l3_len and
143 * ipproto. This function is able to recognize IPv4/IPv6 with one optional vlan
144 * header. The l4_len argument is only set in case of TCP (useful for TSO).
147 parse_ethernet(struct rte_ether_hdr *eth_hdr, struct testpmd_offload_info *info)
149 struct rte_ipv4_hdr *ipv4_hdr;
150 struct rte_ipv6_hdr *ipv6_hdr;
152 info->l2_len = sizeof(struct rte_ether_hdr);
153 info->ethertype = eth_hdr->ether_type;
155 if (info->ethertype == _htons(RTE_ETHER_TYPE_VLAN)) {
156 struct rte_vlan_hdr *vlan_hdr = (
157 struct rte_vlan_hdr *)(eth_hdr + 1);
159 info->l2_len += sizeof(struct rte_vlan_hdr);
160 info->ethertype = vlan_hdr->eth_proto;
163 switch (info->ethertype) {
164 case _htons(RTE_ETHER_TYPE_IPv4):
165 ipv4_hdr = (struct rte_ipv4_hdr *)
166 ((char *)eth_hdr + info->l2_len);
167 parse_ipv4(ipv4_hdr, info);
169 case _htons(RTE_ETHER_TYPE_IPv6):
170 ipv6_hdr = (struct rte_ipv6_hdr *)
171 ((char *)eth_hdr + info->l2_len);
172 parse_ipv6(ipv6_hdr, info);
182 /* Parse a vxlan header */
184 parse_vxlan(struct udp_hdr *udp_hdr,
185 struct testpmd_offload_info *info,
188 struct rte_ether_hdr *eth_hdr;
190 /* check udp destination port, 4789 is the default vxlan port
191 * (rfc7348) or that the rx offload flag is set (i40e only
193 if (udp_hdr->dst_port != _htons(4789) &&
194 RTE_ETH_IS_TUNNEL_PKT(pkt_type) == 0)
198 info->outer_ethertype = info->ethertype;
199 info->outer_l2_len = info->l2_len;
200 info->outer_l3_len = info->l3_len;
201 info->outer_l4_proto = info->l4_proto;
203 eth_hdr = (struct rte_ether_hdr *)((char *)udp_hdr +
204 sizeof(struct udp_hdr) +
205 sizeof(struct rte_vxlan_hdr));
207 parse_ethernet(eth_hdr, info);
208 info->l2_len += RTE_ETHER_VXLAN_HLEN; /* add udp + vxlan */
211 /* Parse a vxlan-gpe header */
213 parse_vxlan_gpe(struct udp_hdr *udp_hdr,
214 struct testpmd_offload_info *info)
216 struct rte_ether_hdr *eth_hdr;
217 struct rte_ipv4_hdr *ipv4_hdr;
218 struct rte_ipv6_hdr *ipv6_hdr;
219 struct rte_vxlan_gpe_hdr *vxlan_gpe_hdr;
220 uint8_t vxlan_gpe_len = sizeof(*vxlan_gpe_hdr);
222 /* Check udp destination port. */
223 if (udp_hdr->dst_port != _htons(vxlan_gpe_udp_port))
226 vxlan_gpe_hdr = (struct rte_vxlan_gpe_hdr *)((char *)udp_hdr +
227 sizeof(struct udp_hdr));
229 if (!vxlan_gpe_hdr->proto || vxlan_gpe_hdr->proto ==
230 RTE_VXLAN_GPE_TYPE_IPV4) {
232 info->outer_ethertype = info->ethertype;
233 info->outer_l2_len = info->l2_len;
234 info->outer_l3_len = info->l3_len;
235 info->outer_l4_proto = info->l4_proto;
237 ipv4_hdr = (struct rte_ipv4_hdr *)((char *)vxlan_gpe_hdr +
240 parse_ipv4(ipv4_hdr, info);
241 info->ethertype = _htons(RTE_ETHER_TYPE_IPv4);
244 } else if (vxlan_gpe_hdr->proto == RTE_VXLAN_GPE_TYPE_IPV6) {
246 info->outer_ethertype = info->ethertype;
247 info->outer_l2_len = info->l2_len;
248 info->outer_l3_len = info->l3_len;
249 info->outer_l4_proto = info->l4_proto;
251 ipv6_hdr = (struct rte_ipv6_hdr *)((char *)vxlan_gpe_hdr +
254 info->ethertype = _htons(RTE_ETHER_TYPE_IPv6);
255 parse_ipv6(ipv6_hdr, info);
258 } else if (vxlan_gpe_hdr->proto == RTE_VXLAN_GPE_TYPE_ETH) {
260 info->outer_ethertype = info->ethertype;
261 info->outer_l2_len = info->l2_len;
262 info->outer_l3_len = info->l3_len;
263 info->outer_l4_proto = info->l4_proto;
265 eth_hdr = (struct rte_ether_hdr *)((char *)vxlan_gpe_hdr +
268 parse_ethernet(eth_hdr, info);
272 info->l2_len += RTE_ETHER_VXLAN_GPE_HLEN;
275 /* Parse a gre header */
277 parse_gre(struct simple_gre_hdr *gre_hdr, struct testpmd_offload_info *info)
279 struct rte_ether_hdr *eth_hdr;
280 struct rte_ipv4_hdr *ipv4_hdr;
281 struct rte_ipv6_hdr *ipv6_hdr;
284 gre_len += sizeof(struct simple_gre_hdr);
286 if (gre_hdr->flags & _htons(GRE_KEY_PRESENT))
287 gre_len += GRE_EXT_LEN;
288 if (gre_hdr->flags & _htons(GRE_SEQUENCE_PRESENT))
289 gre_len += GRE_EXT_LEN;
290 if (gre_hdr->flags & _htons(GRE_CHECKSUM_PRESENT))
291 gre_len += GRE_EXT_LEN;
293 if (gre_hdr->proto == _htons(RTE_ETHER_TYPE_IPv4)) {
295 info->outer_ethertype = info->ethertype;
296 info->outer_l2_len = info->l2_len;
297 info->outer_l3_len = info->l3_len;
298 info->outer_l4_proto = info->l4_proto;
300 ipv4_hdr = (struct rte_ipv4_hdr *)((char *)gre_hdr + gre_len);
302 parse_ipv4(ipv4_hdr, info);
303 info->ethertype = _htons(RTE_ETHER_TYPE_IPv4);
306 } else if (gre_hdr->proto == _htons(RTE_ETHER_TYPE_IPv6)) {
308 info->outer_ethertype = info->ethertype;
309 info->outer_l2_len = info->l2_len;
310 info->outer_l3_len = info->l3_len;
311 info->outer_l4_proto = info->l4_proto;
313 ipv6_hdr = (struct rte_ipv6_hdr *)((char *)gre_hdr + gre_len);
315 info->ethertype = _htons(RTE_ETHER_TYPE_IPv6);
316 parse_ipv6(ipv6_hdr, info);
319 } else if (gre_hdr->proto == _htons(RTE_ETHER_TYPE_TEB)) {
321 info->outer_ethertype = info->ethertype;
322 info->outer_l2_len = info->l2_len;
323 info->outer_l3_len = info->l3_len;
324 info->outer_l4_proto = info->l4_proto;
326 eth_hdr = (struct rte_ether_hdr *)((char *)gre_hdr + gre_len);
328 parse_ethernet(eth_hdr, info);
332 info->l2_len += gre_len;
336 /* Parse an encapsulated ip or ipv6 header */
338 parse_encap_ip(void *encap_ip, struct testpmd_offload_info *info)
340 struct rte_ipv4_hdr *ipv4_hdr = encap_ip;
341 struct rte_ipv6_hdr *ipv6_hdr = encap_ip;
344 ip_version = (ipv4_hdr->version_ihl & 0xf0) >> 4;
346 if (ip_version != 4 && ip_version != 6)
350 info->outer_ethertype = info->ethertype;
351 info->outer_l2_len = info->l2_len;
352 info->outer_l3_len = info->l3_len;
354 if (ip_version == 4) {
355 parse_ipv4(ipv4_hdr, info);
356 info->ethertype = _htons(RTE_ETHER_TYPE_IPv4);
358 parse_ipv6(ipv6_hdr, info);
359 info->ethertype = _htons(RTE_ETHER_TYPE_IPv6);
364 /* if possible, calculate the checksum of a packet in hw or sw,
365 * depending on the testpmd command line configuration */
367 process_inner_cksums(void *l3_hdr, const struct testpmd_offload_info *info,
368 uint64_t tx_offloads)
370 struct rte_ipv4_hdr *ipv4_hdr = l3_hdr;
371 struct udp_hdr *udp_hdr;
372 struct rte_tcp_hdr *tcp_hdr;
373 struct rte_sctp_hdr *sctp_hdr;
374 uint64_t ol_flags = 0;
375 uint32_t max_pkt_len, tso_segsz = 0;
377 /* ensure packet is large enough to require tso */
378 if (!info->is_tunnel) {
379 max_pkt_len = info->l2_len + info->l3_len + info->l4_len +
381 if (info->tso_segsz != 0 && info->pkt_len > max_pkt_len)
382 tso_segsz = info->tso_segsz;
384 max_pkt_len = info->outer_l2_len + info->outer_l3_len +
385 info->l2_len + info->l3_len + info->l4_len +
386 info->tunnel_tso_segsz;
387 if (info->tunnel_tso_segsz != 0 && info->pkt_len > max_pkt_len)
388 tso_segsz = info->tunnel_tso_segsz;
391 if (info->ethertype == _htons(RTE_ETHER_TYPE_IPv4)) {
393 ipv4_hdr->hdr_checksum = 0;
395 ol_flags |= PKT_TX_IPV4;
396 if (info->l4_proto == IPPROTO_TCP && tso_segsz) {
397 ol_flags |= PKT_TX_IP_CKSUM;
399 if (tx_offloads & DEV_TX_OFFLOAD_IPV4_CKSUM)
400 ol_flags |= PKT_TX_IP_CKSUM;
402 ipv4_hdr->hdr_checksum =
403 rte_ipv4_cksum(ipv4_hdr);
405 } else if (info->ethertype == _htons(RTE_ETHER_TYPE_IPv6))
406 ol_flags |= PKT_TX_IPV6;
408 return 0; /* packet type not supported, nothing to do */
410 if (info->l4_proto == IPPROTO_UDP) {
411 udp_hdr = (struct udp_hdr *)((char *)l3_hdr + info->l3_len);
412 /* do not recalculate udp cksum if it was 0 */
413 if (udp_hdr->dgram_cksum != 0) {
414 udp_hdr->dgram_cksum = 0;
415 if (tx_offloads & DEV_TX_OFFLOAD_UDP_CKSUM)
416 ol_flags |= PKT_TX_UDP_CKSUM;
418 udp_hdr->dgram_cksum =
419 get_udptcp_checksum(l3_hdr, udp_hdr,
423 if (info->gso_enable)
424 ol_flags |= PKT_TX_UDP_SEG;
425 } else if (info->l4_proto == IPPROTO_TCP) {
426 tcp_hdr = (struct rte_tcp_hdr *)((char *)l3_hdr + info->l3_len);
429 ol_flags |= PKT_TX_TCP_SEG;
430 else if (tx_offloads & DEV_TX_OFFLOAD_TCP_CKSUM)
431 ol_flags |= PKT_TX_TCP_CKSUM;
434 get_udptcp_checksum(l3_hdr, tcp_hdr,
437 if (info->gso_enable)
438 ol_flags |= PKT_TX_TCP_SEG;
439 } else if (info->l4_proto == IPPROTO_SCTP) {
440 sctp_hdr = (struct rte_sctp_hdr *)
441 ((char *)l3_hdr + info->l3_len);
443 /* sctp payload must be a multiple of 4 to be
445 if ((tx_offloads & DEV_TX_OFFLOAD_SCTP_CKSUM) &&
446 ((ipv4_hdr->total_length & 0x3) == 0)) {
447 ol_flags |= PKT_TX_SCTP_CKSUM;
449 /* XXX implement CRC32c, example available in
457 /* Calculate the checksum of outer header */
459 process_outer_cksums(void *outer_l3_hdr, struct testpmd_offload_info *info,
460 uint64_t tx_offloads, int tso_enabled)
462 struct rte_ipv4_hdr *ipv4_hdr = outer_l3_hdr;
463 struct rte_ipv6_hdr *ipv6_hdr = outer_l3_hdr;
464 struct udp_hdr *udp_hdr;
465 uint64_t ol_flags = 0;
467 if (info->outer_ethertype == _htons(RTE_ETHER_TYPE_IPv4)) {
468 ipv4_hdr->hdr_checksum = 0;
469 ol_flags |= PKT_TX_OUTER_IPV4;
471 if (tx_offloads & DEV_TX_OFFLOAD_OUTER_IPV4_CKSUM)
472 ol_flags |= PKT_TX_OUTER_IP_CKSUM;
474 ipv4_hdr->hdr_checksum = rte_ipv4_cksum(ipv4_hdr);
476 ol_flags |= PKT_TX_OUTER_IPV6;
478 if (info->outer_l4_proto != IPPROTO_UDP)
481 /* Skip SW outer UDP checksum generation if HW supports it */
482 if (tx_offloads & DEV_TX_OFFLOAD_OUTER_UDP_CKSUM) {
483 ol_flags |= PKT_TX_OUTER_UDP_CKSUM;
487 udp_hdr = (struct udp_hdr *)((char *)outer_l3_hdr + info->outer_l3_len);
489 /* outer UDP checksum is done in software. In the other side, for
490 * UDP tunneling, like VXLAN or Geneve, outer UDP checksum can be
493 * If a packet will be TSOed into small packets by NIC, we cannot
494 * set/calculate a non-zero checksum, because it will be a wrong
495 * value after the packet be split into several small packets.
498 udp_hdr->dgram_cksum = 0;
500 /* do not recalculate udp cksum if it was 0 */
501 if (udp_hdr->dgram_cksum != 0) {
502 udp_hdr->dgram_cksum = 0;
503 if (info->outer_ethertype == _htons(RTE_ETHER_TYPE_IPv4))
504 udp_hdr->dgram_cksum =
505 rte_ipv4_udptcp_cksum(ipv4_hdr, udp_hdr);
507 udp_hdr->dgram_cksum =
508 rte_ipv6_udptcp_cksum(ipv6_hdr, udp_hdr);
516 * Performs actual copying.
517 * Returns number of segments in the destination mbuf on success,
518 * or negative error code on failure.
521 mbuf_copy_split(const struct rte_mbuf *ms, struct rte_mbuf *md[],
522 uint16_t seglen[], uint8_t nb_seg)
524 uint32_t dlen, slen, tlen;
526 const struct rte_mbuf *m;
539 while (ms != NULL && i != nb_seg) {
542 slen = rte_pktmbuf_data_len(ms);
543 src = rte_pktmbuf_mtod(ms, const uint8_t *);
547 dlen = RTE_MIN(seglen[i], slen);
548 md[i]->data_len = dlen;
549 md[i]->next = (i + 1 == nb_seg) ? NULL : md[i + 1];
550 dst = rte_pktmbuf_mtod(md[i], uint8_t *);
553 len = RTE_MIN(slen, dlen);
554 memcpy(dst, src, len);
569 else if (tlen != m->pkt_len)
572 md[0]->nb_segs = nb_seg;
573 md[0]->pkt_len = tlen;
574 md[0]->vlan_tci = m->vlan_tci;
575 md[0]->vlan_tci_outer = m->vlan_tci_outer;
576 md[0]->ol_flags = m->ol_flags;
577 md[0]->tx_offload = m->tx_offload;
583 * Allocate a new mbuf with up to tx_pkt_nb_segs segments.
584 * Copy packet contents and offload information into the new segmented mbuf.
586 static struct rte_mbuf *
587 pkt_copy_split(const struct rte_mbuf *pkt)
590 uint32_t i, len, nb_seg;
591 struct rte_mempool *mp;
592 uint16_t seglen[RTE_MAX_SEGS_PER_PKT];
593 struct rte_mbuf *p, *md[RTE_MAX_SEGS_PER_PKT];
595 mp = current_fwd_lcore()->mbp;
597 if (tx_pkt_split == TX_PKT_SPLIT_RND)
598 nb_seg = random() % tx_pkt_nb_segs + 1;
600 nb_seg = tx_pkt_nb_segs;
602 memcpy(seglen, tx_pkt_seg_lengths, nb_seg * sizeof(seglen[0]));
604 /* calculate number of segments to use and their length. */
606 for (i = 0; i != nb_seg && len < pkt->pkt_len; i++) {
611 n = pkt->pkt_len - len;
613 /* update size of the last segment to fit rest of the packet */
621 p = rte_pktmbuf_alloc(mp);
624 "failed to allocate %u-th of %u mbuf "
625 "from mempool: %s\n",
626 nb_seg - i, nb_seg, mp->name);
631 if (rte_pktmbuf_tailroom(md[i]) < seglen[i]) {
632 TESTPMD_LOG(ERR, "mempool %s, %u-th segment: "
633 "expected seglen: %u, "
634 "actual mbuf tailroom: %u\n",
635 mp->name, i, seglen[i],
636 rte_pktmbuf_tailroom(md[i]));
641 /* all mbufs successfully allocated, do copy */
643 rc = mbuf_copy_split(pkt, md, seglen, nb_seg);
646 "mbuf_copy_split for %p(len=%u, nb_seg=%u) "
647 "into %u segments failed with error code: %d\n",
648 pkt, pkt->pkt_len, pkt->nb_segs, nb_seg, rc);
650 /* figure out how many mbufs to free. */
654 /* free unused mbufs */
655 for (; i != nb_seg; i++) {
656 rte_pktmbuf_free_seg(md[i]);
664 * Receive a burst of packets, and for each packet:
665 * - parse packet, and try to recognize a supported packet type (1)
666 * - if it's not a supported packet type, don't touch the packet, else:
667 * - reprocess the checksum of all supported layers. This is done in SW
668 * or HW, depending on testpmd command line configuration
669 * - if TSO is enabled in testpmd command line, also flag the mbuf for TCP
670 * segmentation offload (this implies HW TCP checksum)
671 * Then transmit packets on the output port.
673 * (1) Supported packets are:
674 * Ether / (vlan) / IP|IP6 / UDP|TCP|SCTP .
675 * Ether / (vlan) / outer IP|IP6 / outer UDP / VxLAN / Ether / IP|IP6 /
677 * Ether / (vlan) / outer IP|IP6 / outer UDP / VXLAN-GPE / Ether / IP|IP6 /
679 * Ether / (vlan) / outer IP|IP6 / outer UDP / VXLAN-GPE / IP|IP6 /
681 * Ether / (vlan) / outer IP|IP6 / GRE / Ether / IP|IP6 / UDP|TCP|SCTP
682 * Ether / (vlan) / outer IP|IP6 / GRE / IP|IP6 / UDP|TCP|SCTP
683 * Ether / (vlan) / outer IP|IP6 / IP|IP6 / UDP|TCP|SCTP
685 * The testpmd command line for this forward engine sets the flags
686 * TESTPMD_TX_OFFLOAD_* in ports[tx_port].tx_ol_flags. They control
687 * wether a checksum must be calculated in software or in hardware. The
688 * IP, UDP, TCP and SCTP flags always concern the inner layer. The
689 * OUTER_IP is only useful for tunnel packets.
692 pkt_burst_checksum_forward(struct fwd_stream *fs)
694 struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
695 struct rte_mbuf *gso_segments[GSO_MAX_PKT_BURST];
696 struct rte_gso_ctx *gso_ctx;
697 struct rte_mbuf **tx_pkts_burst;
698 struct rte_port *txp;
699 struct rte_mbuf *m, *p;
700 struct rte_ether_hdr *eth_hdr;
701 void *l3_hdr = NULL, *outer_l3_hdr = NULL; /* can be IPv4 or IPv6 */
703 uint16_t gro_pkts_num;
709 uint64_t rx_ol_flags, tx_ol_flags;
710 uint64_t tx_offloads;
712 uint32_t rx_bad_ip_csum;
713 uint32_t rx_bad_l4_csum;
714 uint32_t rx_bad_outer_l4_csum;
715 struct testpmd_offload_info info;
716 uint16_t nb_segments = 0;
719 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
722 uint64_t core_cycles;
725 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
726 start_tsc = rte_rdtsc();
729 /* receive a burst of packet */
730 nb_rx = rte_eth_rx_burst(fs->rx_port, fs->rx_queue, pkts_burst,
732 if (unlikely(nb_rx == 0))
734 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS
735 fs->rx_burst_stats.pkt_burst_spread[nb_rx]++;
737 fs->rx_packets += nb_rx;
740 rx_bad_outer_l4_csum = 0;
741 gro_enable = gro_ports[fs->rx_port].enable;
743 txp = &ports[fs->tx_port];
744 tx_offloads = txp->dev_conf.txmode.offloads;
745 memset(&info, 0, sizeof(info));
746 info.tso_segsz = txp->tso_segsz;
747 info.tunnel_tso_segsz = txp->tunnel_tso_segsz;
748 if (gso_ports[fs->tx_port].enable)
751 for (i = 0; i < nb_rx; i++) {
752 if (likely(i < nb_rx - 1))
753 rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[i + 1],
758 info.pkt_len = rte_pktmbuf_pkt_len(m);
759 tx_ol_flags = m->ol_flags &
760 (IND_ATTACHED_MBUF | EXT_ATTACHED_MBUF);
761 rx_ol_flags = m->ol_flags;
763 /* Update the L3/L4 checksum error packet statistics */
764 if ((rx_ol_flags & PKT_RX_IP_CKSUM_MASK) == PKT_RX_IP_CKSUM_BAD)
766 if ((rx_ol_flags & PKT_RX_L4_CKSUM_MASK) == PKT_RX_L4_CKSUM_BAD)
768 if (rx_ol_flags & PKT_RX_OUTER_L4_CKSUM_BAD)
769 rx_bad_outer_l4_csum += 1;
771 /* step 1: dissect packet, parsing optional vlan, ip4/ip6, vxlan
772 * and inner headers */
774 eth_hdr = rte_pktmbuf_mtod(m, struct rte_ether_hdr *);
775 rte_ether_addr_copy(&peer_eth_addrs[fs->peer_addr],
777 rte_ether_addr_copy(&ports[fs->tx_port].eth_addr,
779 parse_ethernet(eth_hdr, &info);
780 l3_hdr = (char *)eth_hdr + info.l2_len;
782 /* check if it's a supported tunnel */
783 if (txp->parse_tunnel) {
784 if (info.l4_proto == IPPROTO_UDP) {
785 struct udp_hdr *udp_hdr;
787 udp_hdr = (struct udp_hdr *)((char *)l3_hdr +
789 parse_vxlan_gpe(udp_hdr, &info);
790 if (info.is_tunnel) {
791 tx_ol_flags |= PKT_TX_TUNNEL_VXLAN_GPE;
793 parse_vxlan(udp_hdr, &info,
799 } else if (info.l4_proto == IPPROTO_GRE) {
800 struct simple_gre_hdr *gre_hdr;
802 gre_hdr = (struct simple_gre_hdr *)
803 ((char *)l3_hdr + info.l3_len);
804 parse_gre(gre_hdr, &info);
806 tx_ol_flags |= PKT_TX_TUNNEL_GRE;
807 } else if (info.l4_proto == IPPROTO_IPIP) {
810 encap_ip_hdr = (char *)l3_hdr + info.l3_len;
811 parse_encap_ip(encap_ip_hdr, &info);
813 tx_ol_flags |= PKT_TX_TUNNEL_IPIP;
817 /* update l3_hdr and outer_l3_hdr if a tunnel was parsed */
818 if (info.is_tunnel) {
819 outer_l3_hdr = l3_hdr;
820 l3_hdr = (char *)l3_hdr + info.outer_l3_len + info.l2_len;
823 /* step 2: depending on user command line configuration,
824 * recompute checksum either in software or flag the
825 * mbuf to offload the calculation to the NIC. If TSO
826 * is configured, prepare the mbuf for TCP segmentation. */
828 /* process checksums of inner headers first */
829 tx_ol_flags |= process_inner_cksums(l3_hdr, &info,
832 /* Then process outer headers if any. Note that the software
833 * checksum will be wrong if one of the inner checksums is
834 * processed in hardware. */
835 if (info.is_tunnel == 1) {
836 tx_ol_flags |= process_outer_cksums(outer_l3_hdr, &info,
838 !!(tx_ol_flags & PKT_TX_TCP_SEG));
841 /* step 3: fill the mbuf meta data (flags and header lengths) */
844 if (info.is_tunnel == 1) {
845 if (info.tunnel_tso_segsz ||
847 DEV_TX_OFFLOAD_OUTER_IPV4_CKSUM) ||
849 DEV_TX_OFFLOAD_OUTER_UDP_CKSUM) ||
850 (tx_ol_flags & PKT_TX_OUTER_IPV6)) {
851 m->outer_l2_len = info.outer_l2_len;
852 m->outer_l3_len = info.outer_l3_len;
853 m->l2_len = info.l2_len;
854 m->l3_len = info.l3_len;
855 m->l4_len = info.l4_len;
856 m->tso_segsz = info.tunnel_tso_segsz;
859 /* if there is a outer UDP cksum
860 processed in sw and the inner in hw,
861 the outer checksum will be wrong as
862 the payload will be modified by the
864 m->l2_len = info.outer_l2_len +
865 info.outer_l3_len + info.l2_len;
866 m->l3_len = info.l3_len;
867 m->l4_len = info.l4_len;
870 /* this is only useful if an offload flag is
871 * set, but it does not hurt to fill it in any
873 m->l2_len = info.l2_len;
874 m->l3_len = info.l3_len;
875 m->l4_len = info.l4_len;
876 m->tso_segsz = info.tso_segsz;
878 m->ol_flags = tx_ol_flags;
880 /* Do split & copy for the packet. */
881 if (tx_pkt_split != TX_PKT_SPLIT_OFF) {
882 p = pkt_copy_split(m);
890 /* if verbose mode is enabled, dump debug info */
891 if (verbose_level > 0) {
894 printf("-----------------\n");
895 printf("port=%u, mbuf=%p, pkt_len=%u, nb_segs=%u:\n",
896 fs->rx_port, m, m->pkt_len, m->nb_segs);
897 /* dump rx parsed packet info */
898 rte_get_rx_ol_flag_list(rx_ol_flags, buf, sizeof(buf));
899 printf("rx: l2_len=%d ethertype=%x l3_len=%d "
900 "l4_proto=%d l4_len=%d flags=%s\n",
901 info.l2_len, rte_be_to_cpu_16(info.ethertype),
902 info.l3_len, info.l4_proto, info.l4_len, buf);
903 if (rx_ol_flags & PKT_RX_LRO)
904 printf("rx: m->lro_segsz=%u\n", m->tso_segsz);
905 if (info.is_tunnel == 1)
906 printf("rx: outer_l2_len=%d outer_ethertype=%x "
907 "outer_l3_len=%d\n", info.outer_l2_len,
908 rte_be_to_cpu_16(info.outer_ethertype),
910 /* dump tx packet info */
911 if ((tx_offloads & (DEV_TX_OFFLOAD_IPV4_CKSUM |
912 DEV_TX_OFFLOAD_UDP_CKSUM |
913 DEV_TX_OFFLOAD_TCP_CKSUM |
914 DEV_TX_OFFLOAD_SCTP_CKSUM)) ||
916 printf("tx: m->l2_len=%d m->l3_len=%d "
918 m->l2_len, m->l3_len, m->l4_len);
919 if (info.is_tunnel == 1) {
921 DEV_TX_OFFLOAD_OUTER_IPV4_CKSUM) ||
923 DEV_TX_OFFLOAD_OUTER_UDP_CKSUM) ||
924 (tx_ol_flags & PKT_TX_OUTER_IPV6))
925 printf("tx: m->outer_l2_len=%d "
926 "m->outer_l3_len=%d\n",
929 if (info.tunnel_tso_segsz != 0 &&
930 (m->ol_flags & PKT_TX_TCP_SEG))
931 printf("tx: m->tso_segsz=%d\n",
933 } else if (info.tso_segsz != 0 &&
934 (m->ol_flags & PKT_TX_TCP_SEG))
935 printf("tx: m->tso_segsz=%d\n", m->tso_segsz);
936 rte_get_tx_ol_flag_list(m->ol_flags, buf, sizeof(buf));
937 printf("tx: flags=%s", buf);
942 if (unlikely(gro_enable)) {
943 if (gro_flush_cycles == GRO_DEFAULT_FLUSH_CYCLES) {
944 nb_rx = rte_gro_reassemble_burst(pkts_burst, nb_rx,
945 &(gro_ports[fs->rx_port].param));
947 gro_ctx = current_fwd_lcore()->gro_ctx;
948 nb_rx = rte_gro_reassemble(pkts_burst, nb_rx, gro_ctx);
950 if (++fs->gro_times >= gro_flush_cycles) {
951 gro_pkts_num = rte_gro_get_pkt_count(gro_ctx);
952 if (gro_pkts_num > MAX_PKT_BURST - nb_rx)
953 gro_pkts_num = MAX_PKT_BURST - nb_rx;
955 nb_rx += rte_gro_timeout_flush(gro_ctx, 0,
964 if (gso_ports[fs->tx_port].enable == 0)
965 tx_pkts_burst = pkts_burst;
967 gso_ctx = &(current_fwd_lcore()->gso_ctx);
968 gso_ctx->gso_size = gso_max_segment_size;
969 for (i = 0; i < nb_rx; i++) {
970 ret = rte_gso_segment(pkts_burst[i], gso_ctx,
971 &gso_segments[nb_segments],
972 GSO_MAX_PKT_BURST - nb_segments);
976 TESTPMD_LOG(DEBUG, "Unable to segment packet");
977 rte_pktmbuf_free(pkts_burst[i]);
981 tx_pkts_burst = gso_segments;
985 nb_prep = rte_eth_tx_prepare(fs->tx_port, fs->tx_queue,
986 tx_pkts_burst, nb_rx);
987 if (nb_prep != nb_rx)
988 printf("Preparing packet burst to transmit failed: %s\n",
989 rte_strerror(rte_errno));
991 nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, tx_pkts_burst,
997 if (unlikely(nb_tx < nb_rx) && fs->retry_enabled) {
999 while (nb_tx < nb_rx && retry++ < burst_tx_retry_num) {
1000 rte_delay_us(burst_tx_delay_time);
1001 nb_tx += rte_eth_tx_burst(fs->tx_port, fs->tx_queue,
1002 &tx_pkts_burst[nb_tx], nb_rx - nb_tx);
1005 fs->tx_packets += nb_tx;
1006 fs->rx_bad_ip_csum += rx_bad_ip_csum;
1007 fs->rx_bad_l4_csum += rx_bad_l4_csum;
1008 fs->rx_bad_outer_l4_csum += rx_bad_outer_l4_csum;
1010 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS
1011 fs->tx_burst_stats.pkt_burst_spread[nb_tx]++;
1013 if (unlikely(nb_tx < nb_rx)) {
1014 fs->fwd_dropped += (nb_rx - nb_tx);
1016 rte_pktmbuf_free(tx_pkts_burst[nb_tx]);
1017 } while (++nb_tx < nb_rx);
1020 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
1021 end_tsc = rte_rdtsc();
1022 core_cycles = (end_tsc - start_tsc);
1023 fs->core_cycles = (uint64_t) (fs->core_cycles + core_cycles);
1027 struct fwd_engine csum_fwd_engine = {
1028 .fwd_mode_name = "csum",
1029 .port_fwd_begin = NULL,
1030 .port_fwd_end = NULL,
1031 .packet_fwd = pkt_burst_checksum_forward,