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 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 tcp_hdr *)((char *)ipv4_hdr + info->l3_len);
113 info->l4_len = (tcp_hdr->data_off & 0xf0) >> 2;
114 } else if (info->l4_proto == IPPROTO_UDP)
115 info->l4_len = sizeof(struct udp_hdr);
120 /* Parse an IPv6 header to fill l3_len, l4_len, and l4_proto */
122 parse_ipv6(struct rte_ipv6_hdr *ipv6_hdr, struct testpmd_offload_info *info)
124 struct tcp_hdr *tcp_hdr;
126 info->l3_len = sizeof(struct rte_ipv6_hdr);
127 info->l4_proto = ipv6_hdr->proto;
129 /* only fill l4_len for TCP, it's useful for TSO */
130 if (info->l4_proto == IPPROTO_TCP) {
131 tcp_hdr = (struct tcp_hdr *)((char *)ipv6_hdr + info->l3_len);
132 info->l4_len = (tcp_hdr->data_off & 0xf0) >> 2;
133 } else if (info->l4_proto == IPPROTO_UDP)
134 info->l4_len = sizeof(struct udp_hdr);
140 * Parse an ethernet header to fill the ethertype, l2_len, l3_len and
141 * ipproto. This function is able to recognize IPv4/IPv6 with one optional vlan
142 * header. The l4_len argument is only set in case of TCP (useful for TSO).
145 parse_ethernet(struct rte_ether_hdr *eth_hdr, struct testpmd_offload_info *info)
147 struct rte_ipv4_hdr *ipv4_hdr;
148 struct rte_ipv6_hdr *ipv6_hdr;
150 info->l2_len = sizeof(struct rte_ether_hdr);
151 info->ethertype = eth_hdr->ether_type;
153 if (info->ethertype == _htons(RTE_ETHER_TYPE_VLAN)) {
154 struct rte_vlan_hdr *vlan_hdr = (
155 struct rte_vlan_hdr *)(eth_hdr + 1);
157 info->l2_len += sizeof(struct rte_vlan_hdr);
158 info->ethertype = vlan_hdr->eth_proto;
161 switch (info->ethertype) {
162 case _htons(RTE_ETHER_TYPE_IPv4):
163 ipv4_hdr = (struct rte_ipv4_hdr *)
164 ((char *)eth_hdr + info->l2_len);
165 parse_ipv4(ipv4_hdr, info);
167 case _htons(RTE_ETHER_TYPE_IPv6):
168 ipv6_hdr = (struct rte_ipv6_hdr *)
169 ((char *)eth_hdr + info->l2_len);
170 parse_ipv6(ipv6_hdr, info);
180 /* Parse a vxlan header */
182 parse_vxlan(struct udp_hdr *udp_hdr,
183 struct testpmd_offload_info *info,
186 struct rte_ether_hdr *eth_hdr;
188 /* check udp destination port, 4789 is the default vxlan port
189 * (rfc7348) or that the rx offload flag is set (i40e only
191 if (udp_hdr->dst_port != _htons(4789) &&
192 RTE_ETH_IS_TUNNEL_PKT(pkt_type) == 0)
196 info->outer_ethertype = info->ethertype;
197 info->outer_l2_len = info->l2_len;
198 info->outer_l3_len = info->l3_len;
199 info->outer_l4_proto = info->l4_proto;
201 eth_hdr = (struct rte_ether_hdr *)((char *)udp_hdr +
202 sizeof(struct udp_hdr) +
203 sizeof(struct rte_vxlan_hdr));
205 parse_ethernet(eth_hdr, info);
206 info->l2_len += RTE_ETHER_VXLAN_HLEN; /* add udp + vxlan */
209 /* Parse a vxlan-gpe header */
211 parse_vxlan_gpe(struct udp_hdr *udp_hdr,
212 struct testpmd_offload_info *info)
214 struct rte_ether_hdr *eth_hdr;
215 struct rte_ipv4_hdr *ipv4_hdr;
216 struct rte_ipv6_hdr *ipv6_hdr;
217 struct rte_vxlan_gpe_hdr *vxlan_gpe_hdr;
218 uint8_t vxlan_gpe_len = sizeof(*vxlan_gpe_hdr);
220 /* Check udp destination port. */
221 if (udp_hdr->dst_port != _htons(vxlan_gpe_udp_port))
224 vxlan_gpe_hdr = (struct rte_vxlan_gpe_hdr *)((char *)udp_hdr +
225 sizeof(struct udp_hdr));
227 if (!vxlan_gpe_hdr->proto || vxlan_gpe_hdr->proto ==
228 RTE_VXLAN_GPE_TYPE_IPV4) {
230 info->outer_ethertype = info->ethertype;
231 info->outer_l2_len = info->l2_len;
232 info->outer_l3_len = info->l3_len;
233 info->outer_l4_proto = info->l4_proto;
235 ipv4_hdr = (struct rte_ipv4_hdr *)((char *)vxlan_gpe_hdr +
238 parse_ipv4(ipv4_hdr, info);
239 info->ethertype = _htons(RTE_ETHER_TYPE_IPv4);
242 } else if (vxlan_gpe_hdr->proto == RTE_VXLAN_GPE_TYPE_IPV6) {
244 info->outer_ethertype = info->ethertype;
245 info->outer_l2_len = info->l2_len;
246 info->outer_l3_len = info->l3_len;
247 info->outer_l4_proto = info->l4_proto;
249 ipv6_hdr = (struct rte_ipv6_hdr *)((char *)vxlan_gpe_hdr +
252 info->ethertype = _htons(RTE_ETHER_TYPE_IPv6);
253 parse_ipv6(ipv6_hdr, info);
256 } else if (vxlan_gpe_hdr->proto == RTE_VXLAN_GPE_TYPE_ETH) {
258 info->outer_ethertype = info->ethertype;
259 info->outer_l2_len = info->l2_len;
260 info->outer_l3_len = info->l3_len;
261 info->outer_l4_proto = info->l4_proto;
263 eth_hdr = (struct rte_ether_hdr *)((char *)vxlan_gpe_hdr +
266 parse_ethernet(eth_hdr, info);
270 info->l2_len += RTE_ETHER_VXLAN_GPE_HLEN;
273 /* Parse a gre header */
275 parse_gre(struct simple_gre_hdr *gre_hdr, struct testpmd_offload_info *info)
277 struct rte_ether_hdr *eth_hdr;
278 struct rte_ipv4_hdr *ipv4_hdr;
279 struct rte_ipv6_hdr *ipv6_hdr;
282 gre_len += sizeof(struct simple_gre_hdr);
284 if (gre_hdr->flags & _htons(GRE_KEY_PRESENT))
285 gre_len += GRE_EXT_LEN;
286 if (gre_hdr->flags & _htons(GRE_SEQUENCE_PRESENT))
287 gre_len += GRE_EXT_LEN;
288 if (gre_hdr->flags & _htons(GRE_CHECKSUM_PRESENT))
289 gre_len += GRE_EXT_LEN;
291 if (gre_hdr->proto == _htons(RTE_ETHER_TYPE_IPv4)) {
293 info->outer_ethertype = info->ethertype;
294 info->outer_l2_len = info->l2_len;
295 info->outer_l3_len = info->l3_len;
296 info->outer_l4_proto = info->l4_proto;
298 ipv4_hdr = (struct rte_ipv4_hdr *)((char *)gre_hdr + gre_len);
300 parse_ipv4(ipv4_hdr, info);
301 info->ethertype = _htons(RTE_ETHER_TYPE_IPv4);
304 } else if (gre_hdr->proto == _htons(RTE_ETHER_TYPE_IPv6)) {
306 info->outer_ethertype = info->ethertype;
307 info->outer_l2_len = info->l2_len;
308 info->outer_l3_len = info->l3_len;
309 info->outer_l4_proto = info->l4_proto;
311 ipv6_hdr = (struct rte_ipv6_hdr *)((char *)gre_hdr + gre_len);
313 info->ethertype = _htons(RTE_ETHER_TYPE_IPv6);
314 parse_ipv6(ipv6_hdr, info);
317 } else if (gre_hdr->proto == _htons(RTE_ETHER_TYPE_TEB)) {
319 info->outer_ethertype = info->ethertype;
320 info->outer_l2_len = info->l2_len;
321 info->outer_l3_len = info->l3_len;
322 info->outer_l4_proto = info->l4_proto;
324 eth_hdr = (struct rte_ether_hdr *)((char *)gre_hdr + gre_len);
326 parse_ethernet(eth_hdr, info);
330 info->l2_len += gre_len;
334 /* Parse an encapsulated ip or ipv6 header */
336 parse_encap_ip(void *encap_ip, struct testpmd_offload_info *info)
338 struct rte_ipv4_hdr *ipv4_hdr = encap_ip;
339 struct rte_ipv6_hdr *ipv6_hdr = encap_ip;
342 ip_version = (ipv4_hdr->version_ihl & 0xf0) >> 4;
344 if (ip_version != 4 && ip_version != 6)
348 info->outer_ethertype = info->ethertype;
349 info->outer_l2_len = info->l2_len;
350 info->outer_l3_len = info->l3_len;
352 if (ip_version == 4) {
353 parse_ipv4(ipv4_hdr, info);
354 info->ethertype = _htons(RTE_ETHER_TYPE_IPv4);
356 parse_ipv6(ipv6_hdr, info);
357 info->ethertype = _htons(RTE_ETHER_TYPE_IPv6);
362 /* if possible, calculate the checksum of a packet in hw or sw,
363 * depending on the testpmd command line configuration */
365 process_inner_cksums(void *l3_hdr, const struct testpmd_offload_info *info,
366 uint64_t tx_offloads)
368 struct rte_ipv4_hdr *ipv4_hdr = l3_hdr;
369 struct udp_hdr *udp_hdr;
370 struct tcp_hdr *tcp_hdr;
371 struct rte_sctp_hdr *sctp_hdr;
372 uint64_t ol_flags = 0;
373 uint32_t max_pkt_len, tso_segsz = 0;
375 /* ensure packet is large enough to require tso */
376 if (!info->is_tunnel) {
377 max_pkt_len = info->l2_len + info->l3_len + info->l4_len +
379 if (info->tso_segsz != 0 && info->pkt_len > max_pkt_len)
380 tso_segsz = info->tso_segsz;
382 max_pkt_len = info->outer_l2_len + info->outer_l3_len +
383 info->l2_len + info->l3_len + info->l4_len +
384 info->tunnel_tso_segsz;
385 if (info->tunnel_tso_segsz != 0 && info->pkt_len > max_pkt_len)
386 tso_segsz = info->tunnel_tso_segsz;
389 if (info->ethertype == _htons(RTE_ETHER_TYPE_IPv4)) {
391 ipv4_hdr->hdr_checksum = 0;
393 ol_flags |= PKT_TX_IPV4;
394 if (info->l4_proto == IPPROTO_TCP && tso_segsz) {
395 ol_flags |= PKT_TX_IP_CKSUM;
397 if (tx_offloads & DEV_TX_OFFLOAD_IPV4_CKSUM)
398 ol_flags |= PKT_TX_IP_CKSUM;
400 ipv4_hdr->hdr_checksum =
401 rte_ipv4_cksum(ipv4_hdr);
403 } else if (info->ethertype == _htons(RTE_ETHER_TYPE_IPv6))
404 ol_flags |= PKT_TX_IPV6;
406 return 0; /* packet type not supported, nothing to do */
408 if (info->l4_proto == IPPROTO_UDP) {
409 udp_hdr = (struct udp_hdr *)((char *)l3_hdr + info->l3_len);
410 /* do not recalculate udp cksum if it was 0 */
411 if (udp_hdr->dgram_cksum != 0) {
412 udp_hdr->dgram_cksum = 0;
413 if (tx_offloads & DEV_TX_OFFLOAD_UDP_CKSUM)
414 ol_flags |= PKT_TX_UDP_CKSUM;
416 udp_hdr->dgram_cksum =
417 get_udptcp_checksum(l3_hdr, udp_hdr,
421 if (info->gso_enable)
422 ol_flags |= PKT_TX_UDP_SEG;
423 } else if (info->l4_proto == IPPROTO_TCP) {
424 tcp_hdr = (struct tcp_hdr *)((char *)l3_hdr + info->l3_len);
427 ol_flags |= PKT_TX_TCP_SEG;
428 else if (tx_offloads & DEV_TX_OFFLOAD_TCP_CKSUM)
429 ol_flags |= PKT_TX_TCP_CKSUM;
432 get_udptcp_checksum(l3_hdr, tcp_hdr,
435 if (info->gso_enable)
436 ol_flags |= PKT_TX_TCP_SEG;
437 } else if (info->l4_proto == IPPROTO_SCTP) {
438 sctp_hdr = (struct rte_sctp_hdr *)
439 ((char *)l3_hdr + info->l3_len);
441 /* sctp payload must be a multiple of 4 to be
443 if ((tx_offloads & DEV_TX_OFFLOAD_SCTP_CKSUM) &&
444 ((ipv4_hdr->total_length & 0x3) == 0)) {
445 ol_flags |= PKT_TX_SCTP_CKSUM;
447 /* XXX implement CRC32c, example available in
455 /* Calculate the checksum of outer header */
457 process_outer_cksums(void *outer_l3_hdr, struct testpmd_offload_info *info,
458 uint64_t tx_offloads, int tso_enabled)
460 struct rte_ipv4_hdr *ipv4_hdr = outer_l3_hdr;
461 struct rte_ipv6_hdr *ipv6_hdr = outer_l3_hdr;
462 struct udp_hdr *udp_hdr;
463 uint64_t ol_flags = 0;
465 if (info->outer_ethertype == _htons(RTE_ETHER_TYPE_IPv4)) {
466 ipv4_hdr->hdr_checksum = 0;
467 ol_flags |= PKT_TX_OUTER_IPV4;
469 if (tx_offloads & DEV_TX_OFFLOAD_OUTER_IPV4_CKSUM)
470 ol_flags |= PKT_TX_OUTER_IP_CKSUM;
472 ipv4_hdr->hdr_checksum = rte_ipv4_cksum(ipv4_hdr);
474 ol_flags |= PKT_TX_OUTER_IPV6;
476 if (info->outer_l4_proto != IPPROTO_UDP)
479 /* Skip SW outer UDP checksum generation if HW supports it */
480 if (tx_offloads & DEV_TX_OFFLOAD_OUTER_UDP_CKSUM) {
481 ol_flags |= PKT_TX_OUTER_UDP_CKSUM;
485 udp_hdr = (struct udp_hdr *)((char *)outer_l3_hdr + info->outer_l3_len);
487 /* outer UDP checksum is done in software. In the other side, for
488 * UDP tunneling, like VXLAN or Geneve, outer UDP checksum can be
491 * If a packet will be TSOed into small packets by NIC, we cannot
492 * set/calculate a non-zero checksum, because it will be a wrong
493 * value after the packet be split into several small packets.
496 udp_hdr->dgram_cksum = 0;
498 /* do not recalculate udp cksum if it was 0 */
499 if (udp_hdr->dgram_cksum != 0) {
500 udp_hdr->dgram_cksum = 0;
501 if (info->outer_ethertype == _htons(RTE_ETHER_TYPE_IPv4))
502 udp_hdr->dgram_cksum =
503 rte_ipv4_udptcp_cksum(ipv4_hdr, udp_hdr);
505 udp_hdr->dgram_cksum =
506 rte_ipv6_udptcp_cksum(ipv6_hdr, udp_hdr);
514 * Performs actual copying.
515 * Returns number of segments in the destination mbuf on success,
516 * or negative error code on failure.
519 mbuf_copy_split(const struct rte_mbuf *ms, struct rte_mbuf *md[],
520 uint16_t seglen[], uint8_t nb_seg)
522 uint32_t dlen, slen, tlen;
524 const struct rte_mbuf *m;
537 while (ms != NULL && i != nb_seg) {
540 slen = rte_pktmbuf_data_len(ms);
541 src = rte_pktmbuf_mtod(ms, const uint8_t *);
545 dlen = RTE_MIN(seglen[i], slen);
546 md[i]->data_len = dlen;
547 md[i]->next = (i + 1 == nb_seg) ? NULL : md[i + 1];
548 dst = rte_pktmbuf_mtod(md[i], uint8_t *);
551 len = RTE_MIN(slen, dlen);
552 memcpy(dst, src, len);
567 else if (tlen != m->pkt_len)
570 md[0]->nb_segs = nb_seg;
571 md[0]->pkt_len = tlen;
572 md[0]->vlan_tci = m->vlan_tci;
573 md[0]->vlan_tci_outer = m->vlan_tci_outer;
574 md[0]->ol_flags = m->ol_flags;
575 md[0]->tx_offload = m->tx_offload;
581 * Allocate a new mbuf with up to tx_pkt_nb_segs segments.
582 * Copy packet contents and offload information into the new segmented mbuf.
584 static struct rte_mbuf *
585 pkt_copy_split(const struct rte_mbuf *pkt)
588 uint32_t i, len, nb_seg;
589 struct rte_mempool *mp;
590 uint16_t seglen[RTE_MAX_SEGS_PER_PKT];
591 struct rte_mbuf *p, *md[RTE_MAX_SEGS_PER_PKT];
593 mp = current_fwd_lcore()->mbp;
595 if (tx_pkt_split == TX_PKT_SPLIT_RND)
596 nb_seg = random() % tx_pkt_nb_segs + 1;
598 nb_seg = tx_pkt_nb_segs;
600 memcpy(seglen, tx_pkt_seg_lengths, nb_seg * sizeof(seglen[0]));
602 /* calculate number of segments to use and their length. */
604 for (i = 0; i != nb_seg && len < pkt->pkt_len; i++) {
609 n = pkt->pkt_len - len;
611 /* update size of the last segment to fit rest of the packet */
619 p = rte_pktmbuf_alloc(mp);
622 "failed to allocate %u-th of %u mbuf "
623 "from mempool: %s\n",
624 nb_seg - i, nb_seg, mp->name);
629 if (rte_pktmbuf_tailroom(md[i]) < seglen[i]) {
630 TESTPMD_LOG(ERR, "mempool %s, %u-th segment: "
631 "expected seglen: %u, "
632 "actual mbuf tailroom: %u\n",
633 mp->name, i, seglen[i],
634 rte_pktmbuf_tailroom(md[i]));
639 /* all mbufs successfully allocated, do copy */
641 rc = mbuf_copy_split(pkt, md, seglen, nb_seg);
644 "mbuf_copy_split for %p(len=%u, nb_seg=%u) "
645 "into %u segments failed with error code: %d\n",
646 pkt, pkt->pkt_len, pkt->nb_segs, nb_seg, rc);
648 /* figure out how many mbufs to free. */
652 /* free unused mbufs */
653 for (; i != nb_seg; i++) {
654 rte_pktmbuf_free_seg(md[i]);
662 * Receive a burst of packets, and for each packet:
663 * - parse packet, and try to recognize a supported packet type (1)
664 * - if it's not a supported packet type, don't touch the packet, else:
665 * - reprocess the checksum of all supported layers. This is done in SW
666 * or HW, depending on testpmd command line configuration
667 * - if TSO is enabled in testpmd command line, also flag the mbuf for TCP
668 * segmentation offload (this implies HW TCP checksum)
669 * Then transmit packets on the output port.
671 * (1) Supported packets are:
672 * Ether / (vlan) / IP|IP6 / UDP|TCP|SCTP .
673 * Ether / (vlan) / outer IP|IP6 / outer UDP / VxLAN / Ether / IP|IP6 /
675 * Ether / (vlan) / outer IP|IP6 / outer UDP / VXLAN-GPE / Ether / IP|IP6 /
677 * Ether / (vlan) / outer IP|IP6 / outer UDP / VXLAN-GPE / IP|IP6 /
679 * Ether / (vlan) / outer IP|IP6 / GRE / Ether / IP|IP6 / UDP|TCP|SCTP
680 * Ether / (vlan) / outer IP|IP6 / GRE / IP|IP6 / UDP|TCP|SCTP
681 * Ether / (vlan) / outer IP|IP6 / IP|IP6 / UDP|TCP|SCTP
683 * The testpmd command line for this forward engine sets the flags
684 * TESTPMD_TX_OFFLOAD_* in ports[tx_port].tx_ol_flags. They control
685 * wether a checksum must be calculated in software or in hardware. The
686 * IP, UDP, TCP and SCTP flags always concern the inner layer. The
687 * OUTER_IP is only useful for tunnel packets.
690 pkt_burst_checksum_forward(struct fwd_stream *fs)
692 struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
693 struct rte_mbuf *gso_segments[GSO_MAX_PKT_BURST];
694 struct rte_gso_ctx *gso_ctx;
695 struct rte_mbuf **tx_pkts_burst;
696 struct rte_port *txp;
697 struct rte_mbuf *m, *p;
698 struct rte_ether_hdr *eth_hdr;
699 void *l3_hdr = NULL, *outer_l3_hdr = NULL; /* can be IPv4 or IPv6 */
701 uint16_t gro_pkts_num;
707 uint64_t rx_ol_flags, tx_ol_flags;
708 uint64_t tx_offloads;
710 uint32_t rx_bad_ip_csum;
711 uint32_t rx_bad_l4_csum;
712 uint32_t rx_bad_outer_l4_csum;
713 struct testpmd_offload_info info;
714 uint16_t nb_segments = 0;
717 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
720 uint64_t core_cycles;
723 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
724 start_tsc = rte_rdtsc();
727 /* receive a burst of packet */
728 nb_rx = rte_eth_rx_burst(fs->rx_port, fs->rx_queue, pkts_burst,
730 if (unlikely(nb_rx == 0))
732 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS
733 fs->rx_burst_stats.pkt_burst_spread[nb_rx]++;
735 fs->rx_packets += nb_rx;
738 rx_bad_outer_l4_csum = 0;
739 gro_enable = gro_ports[fs->rx_port].enable;
741 txp = &ports[fs->tx_port];
742 tx_offloads = txp->dev_conf.txmode.offloads;
743 memset(&info, 0, sizeof(info));
744 info.tso_segsz = txp->tso_segsz;
745 info.tunnel_tso_segsz = txp->tunnel_tso_segsz;
746 if (gso_ports[fs->tx_port].enable)
749 for (i = 0; i < nb_rx; i++) {
750 if (likely(i < nb_rx - 1))
751 rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[i + 1],
756 info.pkt_len = rte_pktmbuf_pkt_len(m);
757 tx_ol_flags = m->ol_flags &
758 (IND_ATTACHED_MBUF | EXT_ATTACHED_MBUF);
759 rx_ol_flags = m->ol_flags;
761 /* Update the L3/L4 checksum error packet statistics */
762 if ((rx_ol_flags & PKT_RX_IP_CKSUM_MASK) == PKT_RX_IP_CKSUM_BAD)
764 if ((rx_ol_flags & PKT_RX_L4_CKSUM_MASK) == PKT_RX_L4_CKSUM_BAD)
766 if (rx_ol_flags & PKT_RX_OUTER_L4_CKSUM_BAD)
767 rx_bad_outer_l4_csum += 1;
769 /* step 1: dissect packet, parsing optional vlan, ip4/ip6, vxlan
770 * and inner headers */
772 eth_hdr = rte_pktmbuf_mtod(m, struct rte_ether_hdr *);
773 rte_ether_addr_copy(&peer_eth_addrs[fs->peer_addr],
775 rte_ether_addr_copy(&ports[fs->tx_port].eth_addr,
777 parse_ethernet(eth_hdr, &info);
778 l3_hdr = (char *)eth_hdr + info.l2_len;
780 /* check if it's a supported tunnel */
781 if (txp->parse_tunnel) {
782 if (info.l4_proto == IPPROTO_UDP) {
783 struct udp_hdr *udp_hdr;
785 udp_hdr = (struct udp_hdr *)((char *)l3_hdr +
787 parse_vxlan_gpe(udp_hdr, &info);
788 if (info.is_tunnel) {
789 tx_ol_flags |= PKT_TX_TUNNEL_VXLAN_GPE;
791 parse_vxlan(udp_hdr, &info,
797 } else if (info.l4_proto == IPPROTO_GRE) {
798 struct simple_gre_hdr *gre_hdr;
800 gre_hdr = (struct simple_gre_hdr *)
801 ((char *)l3_hdr + info.l3_len);
802 parse_gre(gre_hdr, &info);
804 tx_ol_flags |= PKT_TX_TUNNEL_GRE;
805 } else if (info.l4_proto == IPPROTO_IPIP) {
808 encap_ip_hdr = (char *)l3_hdr + info.l3_len;
809 parse_encap_ip(encap_ip_hdr, &info);
811 tx_ol_flags |= PKT_TX_TUNNEL_IPIP;
815 /* update l3_hdr and outer_l3_hdr if a tunnel was parsed */
816 if (info.is_tunnel) {
817 outer_l3_hdr = l3_hdr;
818 l3_hdr = (char *)l3_hdr + info.outer_l3_len + info.l2_len;
821 /* step 2: depending on user command line configuration,
822 * recompute checksum either in software or flag the
823 * mbuf to offload the calculation to the NIC. If TSO
824 * is configured, prepare the mbuf for TCP segmentation. */
826 /* process checksums of inner headers first */
827 tx_ol_flags |= process_inner_cksums(l3_hdr, &info,
830 /* Then process outer headers if any. Note that the software
831 * checksum will be wrong if one of the inner checksums is
832 * processed in hardware. */
833 if (info.is_tunnel == 1) {
834 tx_ol_flags |= process_outer_cksums(outer_l3_hdr, &info,
836 !!(tx_ol_flags & PKT_TX_TCP_SEG));
839 /* step 3: fill the mbuf meta data (flags and header lengths) */
842 if (info.is_tunnel == 1) {
843 if (info.tunnel_tso_segsz ||
845 DEV_TX_OFFLOAD_OUTER_IPV4_CKSUM) ||
847 DEV_TX_OFFLOAD_OUTER_UDP_CKSUM) ||
848 (tx_ol_flags & PKT_TX_OUTER_IPV6)) {
849 m->outer_l2_len = info.outer_l2_len;
850 m->outer_l3_len = info.outer_l3_len;
851 m->l2_len = info.l2_len;
852 m->l3_len = info.l3_len;
853 m->l4_len = info.l4_len;
854 m->tso_segsz = info.tunnel_tso_segsz;
857 /* if there is a outer UDP cksum
858 processed in sw and the inner in hw,
859 the outer checksum will be wrong as
860 the payload will be modified by the
862 m->l2_len = info.outer_l2_len +
863 info.outer_l3_len + info.l2_len;
864 m->l3_len = info.l3_len;
865 m->l4_len = info.l4_len;
868 /* this is only useful if an offload flag is
869 * set, but it does not hurt to fill it in any
871 m->l2_len = info.l2_len;
872 m->l3_len = info.l3_len;
873 m->l4_len = info.l4_len;
874 m->tso_segsz = info.tso_segsz;
876 m->ol_flags = tx_ol_flags;
878 /* Do split & copy for the packet. */
879 if (tx_pkt_split != TX_PKT_SPLIT_OFF) {
880 p = pkt_copy_split(m);
888 /* if verbose mode is enabled, dump debug info */
889 if (verbose_level > 0) {
892 printf("-----------------\n");
893 printf("port=%u, mbuf=%p, pkt_len=%u, nb_segs=%u:\n",
894 fs->rx_port, m, m->pkt_len, m->nb_segs);
895 /* dump rx parsed packet info */
896 rte_get_rx_ol_flag_list(rx_ol_flags, buf, sizeof(buf));
897 printf("rx: l2_len=%d ethertype=%x l3_len=%d "
898 "l4_proto=%d l4_len=%d flags=%s\n",
899 info.l2_len, rte_be_to_cpu_16(info.ethertype),
900 info.l3_len, info.l4_proto, info.l4_len, buf);
901 if (rx_ol_flags & PKT_RX_LRO)
902 printf("rx: m->lro_segsz=%u\n", m->tso_segsz);
903 if (info.is_tunnel == 1)
904 printf("rx: outer_l2_len=%d outer_ethertype=%x "
905 "outer_l3_len=%d\n", info.outer_l2_len,
906 rte_be_to_cpu_16(info.outer_ethertype),
908 /* dump tx packet info */
909 if ((tx_offloads & (DEV_TX_OFFLOAD_IPV4_CKSUM |
910 DEV_TX_OFFLOAD_UDP_CKSUM |
911 DEV_TX_OFFLOAD_TCP_CKSUM |
912 DEV_TX_OFFLOAD_SCTP_CKSUM)) ||
914 printf("tx: m->l2_len=%d m->l3_len=%d "
916 m->l2_len, m->l3_len, m->l4_len);
917 if (info.is_tunnel == 1) {
919 DEV_TX_OFFLOAD_OUTER_IPV4_CKSUM) ||
921 DEV_TX_OFFLOAD_OUTER_UDP_CKSUM) ||
922 (tx_ol_flags & PKT_TX_OUTER_IPV6))
923 printf("tx: m->outer_l2_len=%d "
924 "m->outer_l3_len=%d\n",
927 if (info.tunnel_tso_segsz != 0 &&
928 (m->ol_flags & PKT_TX_TCP_SEG))
929 printf("tx: m->tso_segsz=%d\n",
931 } else if (info.tso_segsz != 0 &&
932 (m->ol_flags & PKT_TX_TCP_SEG))
933 printf("tx: m->tso_segsz=%d\n", m->tso_segsz);
934 rte_get_tx_ol_flag_list(m->ol_flags, buf, sizeof(buf));
935 printf("tx: flags=%s", buf);
940 if (unlikely(gro_enable)) {
941 if (gro_flush_cycles == GRO_DEFAULT_FLUSH_CYCLES) {
942 nb_rx = rte_gro_reassemble_burst(pkts_burst, nb_rx,
943 &(gro_ports[fs->rx_port].param));
945 gro_ctx = current_fwd_lcore()->gro_ctx;
946 nb_rx = rte_gro_reassemble(pkts_burst, nb_rx, gro_ctx);
948 if (++fs->gro_times >= gro_flush_cycles) {
949 gro_pkts_num = rte_gro_get_pkt_count(gro_ctx);
950 if (gro_pkts_num > MAX_PKT_BURST - nb_rx)
951 gro_pkts_num = MAX_PKT_BURST - nb_rx;
953 nb_rx += rte_gro_timeout_flush(gro_ctx, 0,
962 if (gso_ports[fs->tx_port].enable == 0)
963 tx_pkts_burst = pkts_burst;
965 gso_ctx = &(current_fwd_lcore()->gso_ctx);
966 gso_ctx->gso_size = gso_max_segment_size;
967 for (i = 0; i < nb_rx; i++) {
968 ret = rte_gso_segment(pkts_burst[i], gso_ctx,
969 &gso_segments[nb_segments],
970 GSO_MAX_PKT_BURST - nb_segments);
974 TESTPMD_LOG(DEBUG, "Unable to segment packet");
975 rte_pktmbuf_free(pkts_burst[i]);
979 tx_pkts_burst = gso_segments;
983 nb_prep = rte_eth_tx_prepare(fs->tx_port, fs->tx_queue,
984 tx_pkts_burst, nb_rx);
985 if (nb_prep != nb_rx)
986 printf("Preparing packet burst to transmit failed: %s\n",
987 rte_strerror(rte_errno));
989 nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, tx_pkts_burst,
995 if (unlikely(nb_tx < nb_rx) && fs->retry_enabled) {
997 while (nb_tx < nb_rx && retry++ < burst_tx_retry_num) {
998 rte_delay_us(burst_tx_delay_time);
999 nb_tx += rte_eth_tx_burst(fs->tx_port, fs->tx_queue,
1000 &tx_pkts_burst[nb_tx], nb_rx - nb_tx);
1003 fs->tx_packets += nb_tx;
1004 fs->rx_bad_ip_csum += rx_bad_ip_csum;
1005 fs->rx_bad_l4_csum += rx_bad_l4_csum;
1006 fs->rx_bad_outer_l4_csum += rx_bad_outer_l4_csum;
1008 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS
1009 fs->tx_burst_stats.pkt_burst_spread[nb_tx]++;
1011 if (unlikely(nb_tx < nb_rx)) {
1012 fs->fwd_dropped += (nb_rx - nb_tx);
1014 rte_pktmbuf_free(tx_pkts_burst[nb_tx]);
1015 } while (++nb_tx < nb_rx);
1018 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
1019 end_tsc = rte_rdtsc();
1020 core_cycles = (end_tsc - start_tsc);
1021 fs->core_cycles = (uint64_t) (fs->core_cycles + core_cycles);
1025 struct fwd_engine csum_fwd_engine = {
1026 .fwd_mode_name = "csum",
1027 .port_fwd_begin = NULL,
1028 .port_fwd_end = NULL,
1029 .packet_fwd = pkt_burst_checksum_forward,