4 * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
5 * Copyright 2014 6WIND S.A.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * * Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * * Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
18 * * Neither the name of Intel Corporation nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
25 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
26 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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28 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
32 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
42 #include <sys/queue.h>
45 #include <rte_common.h>
46 #include <rte_byteorder.h>
48 #include <rte_debug.h>
49 #include <rte_cycles.h>
50 #include <rte_memory.h>
51 #include <rte_memcpy.h>
52 #include <rte_memzone.h>
53 #include <rte_launch.h>
55 #include <rte_per_lcore.h>
56 #include <rte_lcore.h>
57 #include <rte_atomic.h>
58 #include <rte_branch_prediction.h>
59 #include <rte_memory.h>
60 #include <rte_mempool.h>
62 #include <rte_memcpy.h>
63 #include <rte_interrupts.h>
65 #include <rte_ether.h>
66 #include <rte_ethdev.h>
71 #include <rte_prefetch.h>
72 #include <rte_string_fns.h>
75 #define IP_DEFTTL 64 /* from RFC 1340. */
76 #define IP_VERSION 0x40
77 #define IP_HDRLEN 0x05 /* default IP header length == five 32-bits words. */
78 #define IP_VHL_DEF (IP_VERSION | IP_HDRLEN)
80 #define GRE_KEY_PRESENT 0x2000
82 #define GRE_SUPPORTED_FIELDS GRE_KEY_PRESENT
84 /* We cannot use rte_cpu_to_be_16() on a constant in a switch/case */
85 #if RTE_BYTE_ORDER == RTE_LITTLE_ENDIAN
86 #define _htons(x) ((uint16_t)((((x) & 0x00ffU) << 8) | (((x) & 0xff00U) >> 8)))
91 /* structure that caches offload info for the current packet */
92 struct testpmd_offload_info {
99 uint16_t outer_ethertype;
100 uint16_t outer_l2_len;
101 uint16_t outer_l3_len;
102 uint8_t outer_l4_proto;
104 uint16_t tunnel_tso_segsz;
108 /* simplified GRE header */
109 struct simple_gre_hdr {
112 } __attribute__((__packed__));
115 get_psd_sum(void *l3_hdr, uint16_t ethertype, uint64_t ol_flags)
117 if (ethertype == _htons(ETHER_TYPE_IPv4))
118 return rte_ipv4_phdr_cksum(l3_hdr, ol_flags);
119 else /* assume ethertype == ETHER_TYPE_IPv6 */
120 return rte_ipv6_phdr_cksum(l3_hdr, ol_flags);
124 get_udptcp_checksum(void *l3_hdr, void *l4_hdr, uint16_t ethertype)
126 if (ethertype == _htons(ETHER_TYPE_IPv4))
127 return rte_ipv4_udptcp_cksum(l3_hdr, l4_hdr);
128 else /* assume ethertype == ETHER_TYPE_IPv6 */
129 return rte_ipv6_udptcp_cksum(l3_hdr, l4_hdr);
132 /* Parse an IPv4 header to fill l3_len, l4_len, and l4_proto */
134 parse_ipv4(struct ipv4_hdr *ipv4_hdr, struct testpmd_offload_info *info)
136 struct tcp_hdr *tcp_hdr;
138 info->l3_len = (ipv4_hdr->version_ihl & 0x0f) * 4;
139 info->l4_proto = ipv4_hdr->next_proto_id;
141 /* only fill l4_len for TCP, it's useful for TSO */
142 if (info->l4_proto == IPPROTO_TCP) {
143 tcp_hdr = (struct tcp_hdr *)((char *)ipv4_hdr + info->l3_len);
144 info->l4_len = (tcp_hdr->data_off & 0xf0) >> 2;
145 } else if (info->l4_proto == IPPROTO_UDP)
146 info->l4_len = sizeof(struct udp_hdr);
151 /* Parse an IPv6 header to fill l3_len, l4_len, and l4_proto */
153 parse_ipv6(struct ipv6_hdr *ipv6_hdr, struct testpmd_offload_info *info)
155 struct tcp_hdr *tcp_hdr;
157 info->l3_len = sizeof(struct ipv6_hdr);
158 info->l4_proto = ipv6_hdr->proto;
160 /* only fill l4_len for TCP, it's useful for TSO */
161 if (info->l4_proto == IPPROTO_TCP) {
162 tcp_hdr = (struct tcp_hdr *)((char *)ipv6_hdr + info->l3_len);
163 info->l4_len = (tcp_hdr->data_off & 0xf0) >> 2;
164 } else if (info->l4_proto == IPPROTO_UDP)
165 info->l4_len = sizeof(struct udp_hdr);
171 * Parse an ethernet header to fill the ethertype, l2_len, l3_len and
172 * ipproto. This function is able to recognize IPv4/IPv6 with one optional vlan
173 * header. The l4_len argument is only set in case of TCP (useful for TSO).
176 parse_ethernet(struct ether_hdr *eth_hdr, struct testpmd_offload_info *info)
178 struct ipv4_hdr *ipv4_hdr;
179 struct ipv6_hdr *ipv6_hdr;
181 info->l2_len = sizeof(struct ether_hdr);
182 info->ethertype = eth_hdr->ether_type;
184 if (info->ethertype == _htons(ETHER_TYPE_VLAN)) {
185 struct vlan_hdr *vlan_hdr = (struct vlan_hdr *)(eth_hdr + 1);
187 info->l2_len += sizeof(struct vlan_hdr);
188 info->ethertype = vlan_hdr->eth_proto;
191 switch (info->ethertype) {
192 case _htons(ETHER_TYPE_IPv4):
193 ipv4_hdr = (struct ipv4_hdr *) ((char *)eth_hdr + info->l2_len);
194 parse_ipv4(ipv4_hdr, info);
196 case _htons(ETHER_TYPE_IPv6):
197 ipv6_hdr = (struct ipv6_hdr *) ((char *)eth_hdr + info->l2_len);
198 parse_ipv6(ipv6_hdr, info);
208 /* Parse a vxlan header */
210 parse_vxlan(struct udp_hdr *udp_hdr,
211 struct testpmd_offload_info *info,
214 struct ether_hdr *eth_hdr;
216 /* check udp destination port, 4789 is the default vxlan port
217 * (rfc7348) or that the rx offload flag is set (i40e only
219 if (udp_hdr->dst_port != _htons(4789) &&
220 RTE_ETH_IS_TUNNEL_PKT(pkt_type) == 0)
224 info->outer_ethertype = info->ethertype;
225 info->outer_l2_len = info->l2_len;
226 info->outer_l3_len = info->l3_len;
227 info->outer_l4_proto = info->l4_proto;
229 eth_hdr = (struct ether_hdr *)((char *)udp_hdr +
230 sizeof(struct udp_hdr) +
231 sizeof(struct vxlan_hdr));
233 parse_ethernet(eth_hdr, info);
234 info->l2_len += ETHER_VXLAN_HLEN; /* add udp + vxlan */
237 /* Parse a gre header */
239 parse_gre(struct simple_gre_hdr *gre_hdr, struct testpmd_offload_info *info)
241 struct ether_hdr *eth_hdr;
242 struct ipv4_hdr *ipv4_hdr;
243 struct ipv6_hdr *ipv6_hdr;
246 /* check which fields are supported */
247 if ((gre_hdr->flags & _htons(~GRE_SUPPORTED_FIELDS)) != 0)
250 gre_len += sizeof(struct simple_gre_hdr);
252 if (gre_hdr->flags & _htons(GRE_KEY_PRESENT))
253 gre_len += GRE_KEY_LEN;
255 if (gre_hdr->proto == _htons(ETHER_TYPE_IPv4)) {
257 info->outer_ethertype = info->ethertype;
258 info->outer_l2_len = info->l2_len;
259 info->outer_l3_len = info->l3_len;
260 info->outer_l4_proto = info->l4_proto;
262 ipv4_hdr = (struct ipv4_hdr *)((char *)gre_hdr + gre_len);
264 parse_ipv4(ipv4_hdr, info);
265 info->ethertype = _htons(ETHER_TYPE_IPv4);
268 } else if (gre_hdr->proto == _htons(ETHER_TYPE_IPv6)) {
270 info->outer_ethertype = info->ethertype;
271 info->outer_l2_len = info->l2_len;
272 info->outer_l3_len = info->l3_len;
273 info->outer_l4_proto = info->l4_proto;
275 ipv6_hdr = (struct ipv6_hdr *)((char *)gre_hdr + gre_len);
277 info->ethertype = _htons(ETHER_TYPE_IPv6);
278 parse_ipv6(ipv6_hdr, info);
281 } else if (gre_hdr->proto == _htons(ETHER_TYPE_TEB)) {
283 info->outer_ethertype = info->ethertype;
284 info->outer_l2_len = info->l2_len;
285 info->outer_l3_len = info->l3_len;
286 info->outer_l4_proto = info->l4_proto;
288 eth_hdr = (struct ether_hdr *)((char *)gre_hdr + gre_len);
290 parse_ethernet(eth_hdr, info);
294 info->l2_len += gre_len;
298 /* Parse an encapsulated ip or ipv6 header */
300 parse_encap_ip(void *encap_ip, struct testpmd_offload_info *info)
302 struct ipv4_hdr *ipv4_hdr = encap_ip;
303 struct ipv6_hdr *ipv6_hdr = encap_ip;
306 ip_version = (ipv4_hdr->version_ihl & 0xf0) >> 4;
308 if (ip_version != 4 && ip_version != 6)
312 info->outer_ethertype = info->ethertype;
313 info->outer_l2_len = info->l2_len;
314 info->outer_l3_len = info->l3_len;
316 if (ip_version == 4) {
317 parse_ipv4(ipv4_hdr, info);
318 info->ethertype = _htons(ETHER_TYPE_IPv4);
320 parse_ipv6(ipv6_hdr, info);
321 info->ethertype = _htons(ETHER_TYPE_IPv6);
326 /* if possible, calculate the checksum of a packet in hw or sw,
327 * depending on the testpmd command line configuration */
329 process_inner_cksums(void *l3_hdr, const struct testpmd_offload_info *info,
330 uint16_t testpmd_ol_flags)
332 struct ipv4_hdr *ipv4_hdr = l3_hdr;
333 struct udp_hdr *udp_hdr;
334 struct tcp_hdr *tcp_hdr;
335 struct sctp_hdr *sctp_hdr;
336 uint64_t ol_flags = 0;
337 uint32_t max_pkt_len, tso_segsz = 0;
339 /* ensure packet is large enough to require tso */
340 if (!info->is_tunnel) {
341 max_pkt_len = info->l2_len + info->l3_len + info->l4_len +
343 if (info->tso_segsz != 0 && info->pkt_len > max_pkt_len)
344 tso_segsz = info->tso_segsz;
346 max_pkt_len = info->outer_l2_len + info->outer_l3_len +
347 info->l2_len + info->l3_len + info->l4_len +
348 info->tunnel_tso_segsz;
349 if (info->tunnel_tso_segsz != 0 && info->pkt_len > max_pkt_len)
350 tso_segsz = info->tunnel_tso_segsz;
353 if (info->ethertype == _htons(ETHER_TYPE_IPv4)) {
355 ipv4_hdr->hdr_checksum = 0;
357 ol_flags |= PKT_TX_IPV4;
358 if (info->l4_proto == IPPROTO_TCP && tso_segsz) {
359 ol_flags |= PKT_TX_IP_CKSUM;
361 if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_IP_CKSUM)
362 ol_flags |= PKT_TX_IP_CKSUM;
364 ipv4_hdr->hdr_checksum =
365 rte_ipv4_cksum(ipv4_hdr);
367 } else if (info->ethertype == _htons(ETHER_TYPE_IPv6))
368 ol_flags |= PKT_TX_IPV6;
370 return 0; /* packet type not supported, nothing to do */
372 if (info->l4_proto == IPPROTO_UDP) {
373 udp_hdr = (struct udp_hdr *)((char *)l3_hdr + info->l3_len);
374 /* do not recalculate udp cksum if it was 0 */
375 if (udp_hdr->dgram_cksum != 0) {
376 udp_hdr->dgram_cksum = 0;
377 if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_UDP_CKSUM) {
378 ol_flags |= PKT_TX_UDP_CKSUM;
379 udp_hdr->dgram_cksum = get_psd_sum(l3_hdr,
380 info->ethertype, ol_flags);
382 udp_hdr->dgram_cksum =
383 get_udptcp_checksum(l3_hdr, udp_hdr,
387 } else if (info->l4_proto == IPPROTO_TCP) {
388 tcp_hdr = (struct tcp_hdr *)((char *)l3_hdr + info->l3_len);
391 ol_flags |= PKT_TX_TCP_SEG;
392 tcp_hdr->cksum = get_psd_sum(l3_hdr, info->ethertype,
394 } else if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_TCP_CKSUM) {
395 ol_flags |= PKT_TX_TCP_CKSUM;
396 tcp_hdr->cksum = get_psd_sum(l3_hdr, info->ethertype,
400 get_udptcp_checksum(l3_hdr, tcp_hdr,
403 } else if (info->l4_proto == IPPROTO_SCTP) {
404 sctp_hdr = (struct sctp_hdr *)((char *)l3_hdr + info->l3_len);
406 /* sctp payload must be a multiple of 4 to be
408 if ((testpmd_ol_flags & TESTPMD_TX_OFFLOAD_SCTP_CKSUM) &&
409 ((ipv4_hdr->total_length & 0x3) == 0)) {
410 ol_flags |= PKT_TX_SCTP_CKSUM;
412 /* XXX implement CRC32c, example available in
420 /* Calculate the checksum of outer header */
422 process_outer_cksums(void *outer_l3_hdr, struct testpmd_offload_info *info,
423 uint16_t testpmd_ol_flags, int tso_enabled)
425 struct ipv4_hdr *ipv4_hdr = outer_l3_hdr;
426 struct ipv6_hdr *ipv6_hdr = outer_l3_hdr;
427 struct udp_hdr *udp_hdr;
428 uint64_t ol_flags = 0;
430 if (info->outer_ethertype == _htons(ETHER_TYPE_IPv4)) {
431 ipv4_hdr->hdr_checksum = 0;
432 ol_flags |= PKT_TX_OUTER_IPV4;
434 if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_OUTER_IP_CKSUM)
435 ol_flags |= PKT_TX_OUTER_IP_CKSUM;
437 ipv4_hdr->hdr_checksum = rte_ipv4_cksum(ipv4_hdr);
438 } else if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_OUTER_IP_CKSUM)
439 ol_flags |= PKT_TX_OUTER_IPV6;
441 if (info->outer_l4_proto != IPPROTO_UDP)
444 udp_hdr = (struct udp_hdr *)((char *)outer_l3_hdr + info->outer_l3_len);
446 /* outer UDP checksum is done in software as we have no hardware
447 * supporting it today, and no API for it. In the other side, for
448 * UDP tunneling, like VXLAN or Geneve, outer UDP checksum can be
451 * If a packet will be TSOed into small packets by NIC, we cannot
452 * set/calculate a non-zero checksum, because it will be a wrong
453 * value after the packet be split into several small packets.
456 udp_hdr->dgram_cksum = 0;
458 /* do not recalculate udp cksum if it was 0 */
459 if (udp_hdr->dgram_cksum != 0) {
460 udp_hdr->dgram_cksum = 0;
461 if (info->outer_ethertype == _htons(ETHER_TYPE_IPv4))
462 udp_hdr->dgram_cksum =
463 rte_ipv4_udptcp_cksum(ipv4_hdr, udp_hdr);
465 udp_hdr->dgram_cksum =
466 rte_ipv6_udptcp_cksum(ipv6_hdr, udp_hdr);
474 * Performs actual copying.
475 * Returns number of segments in the destination mbuf on success,
476 * or negative error code on failure.
479 mbuf_copy_split(const struct rte_mbuf *ms, struct rte_mbuf *md[],
480 uint16_t seglen[], uint8_t nb_seg)
482 uint32_t dlen, slen, tlen;
484 const struct rte_mbuf *m;
497 while (ms != NULL && i != nb_seg) {
500 slen = rte_pktmbuf_data_len(ms);
501 src = rte_pktmbuf_mtod(ms, const uint8_t *);
505 dlen = RTE_MIN(seglen[i], slen);
506 md[i]->data_len = dlen;
507 md[i]->next = (i + 1 == nb_seg) ? NULL : md[i + 1];
508 dst = rte_pktmbuf_mtod(md[i], uint8_t *);
511 len = RTE_MIN(slen, dlen);
512 memcpy(dst, src, len);
527 else if (tlen != m->pkt_len)
530 md[0]->nb_segs = nb_seg;
531 md[0]->pkt_len = tlen;
532 md[0]->vlan_tci = m->vlan_tci;
533 md[0]->vlan_tci_outer = m->vlan_tci_outer;
534 md[0]->ol_flags = m->ol_flags;
535 md[0]->tx_offload = m->tx_offload;
541 * Allocate a new mbuf with up to tx_pkt_nb_segs segments.
542 * Copy packet contents and offload information into then new segmented mbuf.
544 static struct rte_mbuf *
545 pkt_copy_split(const struct rte_mbuf *pkt)
548 uint32_t i, len, nb_seg;
549 struct rte_mempool *mp;
550 uint16_t seglen[RTE_MAX_SEGS_PER_PKT];
551 struct rte_mbuf *p, *md[RTE_MAX_SEGS_PER_PKT];
553 mp = current_fwd_lcore()->mbp;
555 if (tx_pkt_split == TX_PKT_SPLIT_RND)
556 nb_seg = random() % tx_pkt_nb_segs + 1;
558 nb_seg = tx_pkt_nb_segs;
560 memcpy(seglen, tx_pkt_seg_lengths, nb_seg * sizeof(seglen[0]));
562 /* calculate number of segments to use and their length. */
564 for (i = 0; i != nb_seg && len < pkt->pkt_len; i++) {
569 n = pkt->pkt_len - len;
571 /* update size of the last segment to fit rest of the packet */
579 p = rte_pktmbuf_alloc(mp);
582 "failed to allocate %u-th of %u mbuf "
583 "from mempool: %s\n",
584 nb_seg - i, nb_seg, mp->name);
589 if (rte_pktmbuf_tailroom(md[i]) < seglen[i]) {
590 RTE_LOG(ERR, USER1, "mempool %s, %u-th segment: "
591 "expected seglen: %u, "
592 "actual mbuf tailroom: %u\n",
593 mp->name, i, seglen[i],
594 rte_pktmbuf_tailroom(md[i]));
599 /* all mbufs successfully allocated, do copy */
601 rc = mbuf_copy_split(pkt, md, seglen, nb_seg);
604 "mbuf_copy_split for %p(len=%u, nb_seg=%hhu) "
605 "into %u segments failed with error code: %d\n",
606 pkt, pkt->pkt_len, pkt->nb_segs, nb_seg, rc);
608 /* figure out how many mbufs to free. */
612 /* free unused mbufs */
613 for (; i != nb_seg; i++) {
614 rte_pktmbuf_free_seg(md[i]);
622 * Receive a burst of packets, and for each packet:
623 * - parse packet, and try to recognize a supported packet type (1)
624 * - if it's not a supported packet type, don't touch the packet, else:
625 * - reprocess the checksum of all supported layers. This is done in SW
626 * or HW, depending on testpmd command line configuration
627 * - if TSO is enabled in testpmd command line, also flag the mbuf for TCP
628 * segmentation offload (this implies HW TCP checksum)
629 * Then transmit packets on the output port.
631 * (1) Supported packets are:
632 * Ether / (vlan) / IP|IP6 / UDP|TCP|SCTP .
633 * Ether / (vlan) / outer IP|IP6 / outer UDP / VxLAN / Ether / IP|IP6 /
635 * Ether / (vlan) / outer IP|IP6 / GRE / Ether / IP|IP6 / UDP|TCP|SCTP
636 * Ether / (vlan) / outer IP|IP6 / GRE / IP|IP6 / UDP|TCP|SCTP
637 * Ether / (vlan) / outer IP|IP6 / IP|IP6 / UDP|TCP|SCTP
639 * The testpmd command line for this forward engine sets the flags
640 * TESTPMD_TX_OFFLOAD_* in ports[tx_port].tx_ol_flags. They control
641 * wether a checksum must be calculated in software or in hardware. The
642 * IP, UDP, TCP and SCTP flags always concern the inner layer. The
643 * OUTER_IP is only useful for tunnel packets.
646 pkt_burst_checksum_forward(struct fwd_stream *fs)
648 struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
649 struct rte_port *txp;
650 struct rte_mbuf *m, *p;
651 struct ether_hdr *eth_hdr;
652 void *l3_hdr = NULL, *outer_l3_hdr = NULL; /* can be IPv4 or IPv6 */
656 uint64_t rx_ol_flags, tx_ol_flags;
657 uint16_t testpmd_ol_flags;
659 uint32_t rx_bad_ip_csum;
660 uint32_t rx_bad_l4_csum;
661 struct testpmd_offload_info info;
663 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
666 uint64_t core_cycles;
669 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
670 start_tsc = rte_rdtsc();
673 /* receive a burst of packet */
674 nb_rx = rte_eth_rx_burst(fs->rx_port, fs->rx_queue, pkts_burst,
676 if (unlikely(nb_rx == 0))
679 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS
680 fs->rx_burst_stats.pkt_burst_spread[nb_rx]++;
682 fs->rx_packets += nb_rx;
686 txp = &ports[fs->tx_port];
687 testpmd_ol_flags = txp->tx_ol_flags;
688 memset(&info, 0, sizeof(info));
689 info.tso_segsz = txp->tso_segsz;
690 info.tunnel_tso_segsz = txp->tunnel_tso_segsz;
692 for (i = 0; i < nb_rx; i++) {
693 if (likely(i < nb_rx - 1))
694 rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[i + 1],
699 info.pkt_len = rte_pktmbuf_pkt_len(m);
701 rx_ol_flags = m->ol_flags;
703 /* Update the L3/L4 checksum error packet statistics */
704 if ((rx_ol_flags & PKT_RX_IP_CKSUM_MASK) == PKT_RX_IP_CKSUM_BAD)
706 if ((rx_ol_flags & PKT_RX_L4_CKSUM_MASK) == PKT_RX_L4_CKSUM_BAD)
709 /* step 1: dissect packet, parsing optional vlan, ip4/ip6, vxlan
710 * and inner headers */
712 eth_hdr = rte_pktmbuf_mtod(m, struct ether_hdr *);
713 ether_addr_copy(&peer_eth_addrs[fs->peer_addr],
715 ether_addr_copy(&ports[fs->tx_port].eth_addr,
717 parse_ethernet(eth_hdr, &info);
718 l3_hdr = (char *)eth_hdr + info.l2_len;
720 /* check if it's a supported tunnel */
721 if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_PARSE_TUNNEL) {
722 if (info.l4_proto == IPPROTO_UDP) {
723 struct udp_hdr *udp_hdr;
725 udp_hdr = (struct udp_hdr *)((char *)l3_hdr +
727 parse_vxlan(udp_hdr, &info, m->packet_type);
729 tx_ol_flags |= PKT_TX_TUNNEL_VXLAN;
730 } else if (info.l4_proto == IPPROTO_GRE) {
731 struct simple_gre_hdr *gre_hdr;
733 gre_hdr = (struct simple_gre_hdr *)
734 ((char *)l3_hdr + info.l3_len);
735 parse_gre(gre_hdr, &info);
737 tx_ol_flags |= PKT_TX_TUNNEL_GRE;
738 } else if (info.l4_proto == IPPROTO_IPIP) {
741 encap_ip_hdr = (char *)l3_hdr + info.l3_len;
742 parse_encap_ip(encap_ip_hdr, &info);
744 tx_ol_flags |= PKT_TX_TUNNEL_IPIP;
748 /* update l3_hdr and outer_l3_hdr if a tunnel was parsed */
749 if (info.is_tunnel) {
750 outer_l3_hdr = l3_hdr;
751 l3_hdr = (char *)l3_hdr + info.outer_l3_len + info.l2_len;
754 /* step 2: depending on user command line configuration,
755 * recompute checksum either in software or flag the
756 * mbuf to offload the calculation to the NIC. If TSO
757 * is configured, prepare the mbuf for TCP segmentation. */
759 /* process checksums of inner headers first */
760 tx_ol_flags |= process_inner_cksums(l3_hdr, &info,
763 /* Then process outer headers if any. Note that the software
764 * checksum will be wrong if one of the inner checksums is
765 * processed in hardware. */
766 if (info.is_tunnel == 1) {
767 tx_ol_flags |= process_outer_cksums(outer_l3_hdr, &info,
769 !!(tx_ol_flags & PKT_TX_TCP_SEG));
772 /* step 3: fill the mbuf meta data (flags and header lengths) */
774 if (info.is_tunnel == 1) {
775 if (info.tunnel_tso_segsz ||
776 testpmd_ol_flags & TESTPMD_TX_OFFLOAD_OUTER_IP_CKSUM) {
777 m->outer_l2_len = info.outer_l2_len;
778 m->outer_l3_len = info.outer_l3_len;
779 m->l2_len = info.l2_len;
780 m->l3_len = info.l3_len;
781 m->l4_len = info.l4_len;
782 m->tso_segsz = info.tunnel_tso_segsz;
785 /* if there is a outer UDP cksum
786 processed in sw and the inner in hw,
787 the outer checksum will be wrong as
788 the payload will be modified by the
790 m->l2_len = info.outer_l2_len +
791 info.outer_l3_len + info.l2_len;
792 m->l3_len = info.l3_len;
793 m->l4_len = info.l4_len;
796 /* this is only useful if an offload flag is
797 * set, but it does not hurt to fill it in any
799 m->l2_len = info.l2_len;
800 m->l3_len = info.l3_len;
801 m->l4_len = info.l4_len;
802 m->tso_segsz = info.tso_segsz;
804 m->ol_flags = tx_ol_flags;
806 /* Do split & copy for the packet. */
807 if (tx_pkt_split != TX_PKT_SPLIT_OFF) {
808 p = pkt_copy_split(m);
816 /* if verbose mode is enabled, dump debug info */
817 if (verbose_level > 0) {
820 printf("-----------------\n");
821 printf("port=%u, mbuf=%p, pkt_len=%u, nb_segs=%hhu:\n",
822 fs->rx_port, m, m->pkt_len, m->nb_segs);
823 /* dump rx parsed packet info */
824 rte_get_rx_ol_flag_list(rx_ol_flags, buf, sizeof(buf));
825 printf("rx: l2_len=%d ethertype=%x l3_len=%d "
826 "l4_proto=%d l4_len=%d flags=%s\n",
827 info.l2_len, rte_be_to_cpu_16(info.ethertype),
828 info.l3_len, info.l4_proto, info.l4_len, buf);
829 if (rx_ol_flags & PKT_RX_LRO)
830 printf("rx: m->lro_segsz=%u\n", m->tso_segsz);
831 if (info.is_tunnel == 1)
832 printf("rx: outer_l2_len=%d outer_ethertype=%x "
833 "outer_l3_len=%d\n", info.outer_l2_len,
834 rte_be_to_cpu_16(info.outer_ethertype),
836 /* dump tx packet info */
837 if ((testpmd_ol_flags & (TESTPMD_TX_OFFLOAD_IP_CKSUM |
838 TESTPMD_TX_OFFLOAD_UDP_CKSUM |
839 TESTPMD_TX_OFFLOAD_TCP_CKSUM |
840 TESTPMD_TX_OFFLOAD_SCTP_CKSUM)) ||
842 printf("tx: m->l2_len=%d m->l3_len=%d "
844 m->l2_len, m->l3_len, m->l4_len);
845 if (info.is_tunnel == 1) {
846 if (testpmd_ol_flags &
847 TESTPMD_TX_OFFLOAD_OUTER_IP_CKSUM)
848 printf("tx: m->outer_l2_len=%d "
849 "m->outer_l3_len=%d\n",
852 if (info.tunnel_tso_segsz != 0 &&
853 (m->ol_flags & PKT_TX_TCP_SEG))
854 printf("tx: m->tso_segsz=%d\n",
856 } else if (info.tso_segsz != 0 &&
857 (m->ol_flags & PKT_TX_TCP_SEG))
858 printf("tx: m->tso_segsz=%d\n", m->tso_segsz);
859 rte_get_tx_ol_flag_list(m->ol_flags, buf, sizeof(buf));
860 printf("tx: flags=%s", buf);
864 nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, pkts_burst, nb_rx);
868 if (unlikely(nb_tx < nb_rx) && fs->retry_enabled) {
870 while (nb_tx < nb_rx && retry++ < burst_tx_retry_num) {
871 rte_delay_us(burst_tx_delay_time);
872 nb_tx += rte_eth_tx_burst(fs->tx_port, fs->tx_queue,
873 &pkts_burst[nb_tx], nb_rx - nb_tx);
876 fs->tx_packets += nb_tx;
877 fs->rx_bad_ip_csum += rx_bad_ip_csum;
878 fs->rx_bad_l4_csum += rx_bad_l4_csum;
880 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS
881 fs->tx_burst_stats.pkt_burst_spread[nb_tx]++;
883 if (unlikely(nb_tx < nb_rx)) {
884 fs->fwd_dropped += (nb_rx - nb_tx);
886 rte_pktmbuf_free(pkts_burst[nb_tx]);
887 } while (++nb_tx < nb_rx);
889 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
890 end_tsc = rte_rdtsc();
891 core_cycles = (end_tsc - start_tsc);
892 fs->core_cycles = (uint64_t) (fs->core_cycles + core_cycles);
896 struct fwd_engine csum_fwd_engine = {
897 .fwd_mode_name = "csum",
898 .port_fwd_begin = NULL,
899 .port_fwd_end = NULL,
900 .packet_fwd = pkt_burst_checksum_forward,