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,
27 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
28 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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>
76 #define IP_DEFTTL 64 /* from RFC 1340. */
77 #define IP_VERSION 0x40
78 #define IP_HDRLEN 0x05 /* default IP header length == five 32-bits words. */
79 #define IP_VHL_DEF (IP_VERSION | IP_HDRLEN)
81 #define GRE_KEY_PRESENT 0x2000
83 #define GRE_SUPPORTED_FIELDS GRE_KEY_PRESENT
85 /* We cannot use rte_cpu_to_be_16() on a constant in a switch/case */
86 #if RTE_BYTE_ORDER == RTE_LITTLE_ENDIAN
87 #define _htons(x) ((uint16_t)((((x) & 0x00ffU) << 8) | (((x) & 0xff00U) >> 8)))
92 /* structure that caches offload info for the current packet */
93 struct testpmd_offload_info {
100 uint16_t outer_ethertype;
101 uint16_t outer_l2_len;
102 uint16_t outer_l3_len;
103 uint8_t outer_l4_proto;
105 uint16_t tunnel_tso_segsz;
109 /* simplified GRE header */
110 struct simple_gre_hdr {
113 } __attribute__((__packed__));
116 get_psd_sum(void *l3_hdr, uint16_t ethertype, uint64_t ol_flags)
118 if (ethertype == _htons(ETHER_TYPE_IPv4))
119 return rte_ipv4_phdr_cksum(l3_hdr, ol_flags);
120 else /* assume ethertype == ETHER_TYPE_IPv6 */
121 return rte_ipv6_phdr_cksum(l3_hdr, ol_flags);
125 get_udptcp_checksum(void *l3_hdr, void *l4_hdr, uint16_t ethertype)
127 if (ethertype == _htons(ETHER_TYPE_IPv4))
128 return rte_ipv4_udptcp_cksum(l3_hdr, l4_hdr);
129 else /* assume ethertype == ETHER_TYPE_IPv6 */
130 return rte_ipv6_udptcp_cksum(l3_hdr, l4_hdr);
133 /* Parse an IPv4 header to fill l3_len, l4_len, and l4_proto */
135 parse_ipv4(struct ipv4_hdr *ipv4_hdr, struct testpmd_offload_info *info)
137 struct tcp_hdr *tcp_hdr;
139 info->l3_len = (ipv4_hdr->version_ihl & 0x0f) * 4;
140 info->l4_proto = ipv4_hdr->next_proto_id;
142 /* only fill l4_len for TCP, it's useful for TSO */
143 if (info->l4_proto == IPPROTO_TCP) {
144 tcp_hdr = (struct tcp_hdr *)((char *)ipv4_hdr + info->l3_len);
145 info->l4_len = (tcp_hdr->data_off & 0xf0) >> 2;
150 /* Parse an IPv6 header to fill l3_len, l4_len, and l4_proto */
152 parse_ipv6(struct ipv6_hdr *ipv6_hdr, struct testpmd_offload_info *info)
154 struct tcp_hdr *tcp_hdr;
156 info->l3_len = sizeof(struct ipv6_hdr);
157 info->l4_proto = ipv6_hdr->proto;
159 /* only fill l4_len for TCP, it's useful for TSO */
160 if (info->l4_proto == IPPROTO_TCP) {
161 tcp_hdr = (struct tcp_hdr *)((char *)ipv6_hdr + info->l3_len);
162 info->l4_len = (tcp_hdr->data_off & 0xf0) >> 2;
168 * Parse an ethernet header to fill the ethertype, l2_len, l3_len and
169 * ipproto. This function is able to recognize IPv4/IPv6 with one optional vlan
170 * header. The l4_len argument is only set in case of TCP (useful for TSO).
173 parse_ethernet(struct ether_hdr *eth_hdr, struct testpmd_offload_info *info)
175 struct ipv4_hdr *ipv4_hdr;
176 struct ipv6_hdr *ipv6_hdr;
178 info->l2_len = sizeof(struct ether_hdr);
179 info->ethertype = eth_hdr->ether_type;
181 if (info->ethertype == _htons(ETHER_TYPE_VLAN)) {
182 struct vlan_hdr *vlan_hdr = (struct vlan_hdr *)(eth_hdr + 1);
184 info->l2_len += sizeof(struct vlan_hdr);
185 info->ethertype = vlan_hdr->eth_proto;
188 switch (info->ethertype) {
189 case _htons(ETHER_TYPE_IPv4):
190 ipv4_hdr = (struct ipv4_hdr *) ((char *)eth_hdr + info->l2_len);
191 parse_ipv4(ipv4_hdr, info);
193 case _htons(ETHER_TYPE_IPv6):
194 ipv6_hdr = (struct ipv6_hdr *) ((char *)eth_hdr + info->l2_len);
195 parse_ipv6(ipv6_hdr, info);
205 /* Parse a vxlan header */
207 parse_vxlan(struct udp_hdr *udp_hdr,
208 struct testpmd_offload_info *info,
211 struct ether_hdr *eth_hdr;
213 /* check udp destination port, 4789 is the default vxlan port
214 * (rfc7348) or that the rx offload flag is set (i40e only
216 if (udp_hdr->dst_port != _htons(4789) &&
217 RTE_ETH_IS_TUNNEL_PKT(pkt_type) == 0)
221 info->outer_ethertype = info->ethertype;
222 info->outer_l2_len = info->l2_len;
223 info->outer_l3_len = info->l3_len;
224 info->outer_l4_proto = info->l4_proto;
226 eth_hdr = (struct ether_hdr *)((char *)udp_hdr +
227 sizeof(struct udp_hdr) +
228 sizeof(struct vxlan_hdr));
230 parse_ethernet(eth_hdr, info);
231 info->l2_len += ETHER_VXLAN_HLEN; /* add udp + vxlan */
234 /* Parse a gre header */
236 parse_gre(struct simple_gre_hdr *gre_hdr, struct testpmd_offload_info *info)
238 struct ether_hdr *eth_hdr;
239 struct ipv4_hdr *ipv4_hdr;
240 struct ipv6_hdr *ipv6_hdr;
243 /* check which fields are supported */
244 if ((gre_hdr->flags & _htons(~GRE_SUPPORTED_FIELDS)) != 0)
247 gre_len += sizeof(struct simple_gre_hdr);
249 if (gre_hdr->flags & _htons(GRE_KEY_PRESENT))
250 gre_len += GRE_KEY_LEN;
252 if (gre_hdr->proto == _htons(ETHER_TYPE_IPv4)) {
254 info->outer_ethertype = info->ethertype;
255 info->outer_l2_len = info->l2_len;
256 info->outer_l3_len = info->l3_len;
257 info->outer_l4_proto = info->l4_proto;
259 ipv4_hdr = (struct ipv4_hdr *)((char *)gre_hdr + gre_len);
261 parse_ipv4(ipv4_hdr, info);
262 info->ethertype = _htons(ETHER_TYPE_IPv4);
265 } else if (gre_hdr->proto == _htons(ETHER_TYPE_IPv6)) {
267 info->outer_ethertype = info->ethertype;
268 info->outer_l2_len = info->l2_len;
269 info->outer_l3_len = info->l3_len;
270 info->outer_l4_proto = info->l4_proto;
272 ipv6_hdr = (struct ipv6_hdr *)((char *)gre_hdr + gre_len);
274 info->ethertype = _htons(ETHER_TYPE_IPv6);
275 parse_ipv6(ipv6_hdr, info);
278 } else if (gre_hdr->proto == _htons(ETHER_TYPE_TEB)) {
280 info->outer_ethertype = info->ethertype;
281 info->outer_l2_len = info->l2_len;
282 info->outer_l3_len = info->l3_len;
283 info->outer_l4_proto = info->l4_proto;
285 eth_hdr = (struct ether_hdr *)((char *)gre_hdr + gre_len);
287 parse_ethernet(eth_hdr, info);
291 info->l2_len += gre_len;
295 /* Parse an encapsulated ip or ipv6 header */
297 parse_encap_ip(void *encap_ip, struct testpmd_offload_info *info)
299 struct ipv4_hdr *ipv4_hdr = encap_ip;
300 struct ipv6_hdr *ipv6_hdr = encap_ip;
303 ip_version = (ipv4_hdr->version_ihl & 0xf0) >> 4;
305 if (ip_version != 4 && ip_version != 6)
309 info->outer_ethertype = info->ethertype;
310 info->outer_l2_len = info->l2_len;
311 info->outer_l3_len = info->l3_len;
313 if (ip_version == 4) {
314 parse_ipv4(ipv4_hdr, info);
315 info->ethertype = _htons(ETHER_TYPE_IPv4);
317 parse_ipv6(ipv6_hdr, info);
318 info->ethertype = _htons(ETHER_TYPE_IPv6);
323 /* if possible, calculate the checksum of a packet in hw or sw,
324 * depending on the testpmd command line configuration */
326 process_inner_cksums(void *l3_hdr, const struct testpmd_offload_info *info,
327 uint16_t testpmd_ol_flags)
329 struct ipv4_hdr *ipv4_hdr = l3_hdr;
330 struct udp_hdr *udp_hdr;
331 struct tcp_hdr *tcp_hdr;
332 struct sctp_hdr *sctp_hdr;
333 uint64_t ol_flags = 0;
334 uint32_t max_pkt_len, tso_segsz = 0;
336 /* ensure packet is large enough to require tso */
337 if (!info->is_tunnel) {
338 max_pkt_len = info->l2_len + info->l3_len + info->l4_len +
340 if (info->tso_segsz != 0 && info->pkt_len > max_pkt_len)
341 tso_segsz = info->tso_segsz;
343 max_pkt_len = info->outer_l2_len + info->outer_l3_len +
344 info->l2_len + info->l3_len + info->l4_len +
345 info->tunnel_tso_segsz;
346 if (info->tunnel_tso_segsz != 0 && info->pkt_len > max_pkt_len)
347 tso_segsz = info->tunnel_tso_segsz;
350 if (info->ethertype == _htons(ETHER_TYPE_IPv4)) {
352 ipv4_hdr->hdr_checksum = 0;
354 ol_flags |= PKT_TX_IPV4;
355 if (info->l4_proto == IPPROTO_TCP && tso_segsz) {
356 ol_flags |= PKT_TX_IP_CKSUM;
358 if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_IP_CKSUM)
359 ol_flags |= PKT_TX_IP_CKSUM;
361 ipv4_hdr->hdr_checksum =
362 rte_ipv4_cksum(ipv4_hdr);
364 } else if (info->ethertype == _htons(ETHER_TYPE_IPv6))
365 ol_flags |= PKT_TX_IPV6;
367 return 0; /* packet type not supported, nothing to do */
369 if (info->l4_proto == IPPROTO_UDP) {
370 udp_hdr = (struct udp_hdr *)((char *)l3_hdr + info->l3_len);
371 /* do not recalculate udp cksum if it was 0 */
372 if (udp_hdr->dgram_cksum != 0) {
373 udp_hdr->dgram_cksum = 0;
374 if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_UDP_CKSUM) {
375 ol_flags |= PKT_TX_UDP_CKSUM;
376 udp_hdr->dgram_cksum = get_psd_sum(l3_hdr,
377 info->ethertype, ol_flags);
379 udp_hdr->dgram_cksum =
380 get_udptcp_checksum(l3_hdr, udp_hdr,
384 } else if (info->l4_proto == IPPROTO_TCP) {
385 tcp_hdr = (struct tcp_hdr *)((char *)l3_hdr + info->l3_len);
388 ol_flags |= PKT_TX_TCP_SEG;
389 tcp_hdr->cksum = get_psd_sum(l3_hdr, info->ethertype,
391 } else if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_TCP_CKSUM) {
392 ol_flags |= PKT_TX_TCP_CKSUM;
393 tcp_hdr->cksum = get_psd_sum(l3_hdr, info->ethertype,
397 get_udptcp_checksum(l3_hdr, tcp_hdr,
400 } else if (info->l4_proto == IPPROTO_SCTP) {
401 sctp_hdr = (struct sctp_hdr *)((char *)l3_hdr + info->l3_len);
403 /* sctp payload must be a multiple of 4 to be
405 if ((testpmd_ol_flags & TESTPMD_TX_OFFLOAD_SCTP_CKSUM) &&
406 ((ipv4_hdr->total_length & 0x3) == 0)) {
407 ol_flags |= PKT_TX_SCTP_CKSUM;
409 /* XXX implement CRC32c, example available in
417 /* Calculate the checksum of outer header */
419 process_outer_cksums(void *outer_l3_hdr, struct testpmd_offload_info *info,
420 uint16_t testpmd_ol_flags, int tso_enabled)
422 struct ipv4_hdr *ipv4_hdr = outer_l3_hdr;
423 struct ipv6_hdr *ipv6_hdr = outer_l3_hdr;
424 struct udp_hdr *udp_hdr;
425 uint64_t ol_flags = 0;
427 if (info->outer_ethertype == _htons(ETHER_TYPE_IPv4)) {
428 ipv4_hdr->hdr_checksum = 0;
429 ol_flags |= PKT_TX_OUTER_IPV4;
431 if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_OUTER_IP_CKSUM)
432 ol_flags |= PKT_TX_OUTER_IP_CKSUM;
434 ipv4_hdr->hdr_checksum = rte_ipv4_cksum(ipv4_hdr);
435 } else if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_OUTER_IP_CKSUM)
436 ol_flags |= PKT_TX_OUTER_IPV6;
438 if (info->outer_l4_proto != IPPROTO_UDP)
441 udp_hdr = (struct udp_hdr *)((char *)outer_l3_hdr + info->outer_l3_len);
443 /* outer UDP checksum is done in software as we have no hardware
444 * supporting it today, and no API for it. In the other side, for
445 * UDP tunneling, like VXLAN or Geneve, outer UDP checksum can be
448 * If a packet will be TSOed into small packets by NIC, we cannot
449 * set/calculate a non-zero checksum, because it will be a wrong
450 * value after the packet be split into several small packets.
453 udp_hdr->dgram_cksum = 0;
455 /* do not recalculate udp cksum if it was 0 */
456 if (udp_hdr->dgram_cksum != 0) {
457 udp_hdr->dgram_cksum = 0;
458 if (info->outer_ethertype == _htons(ETHER_TYPE_IPv4))
459 udp_hdr->dgram_cksum =
460 rte_ipv4_udptcp_cksum(ipv4_hdr, udp_hdr);
462 udp_hdr->dgram_cksum =
463 rte_ipv6_udptcp_cksum(ipv6_hdr, udp_hdr);
471 * Performs actual copying.
472 * Returns number of segments in the destination mbuf on success,
473 * or negative error code on failure.
476 mbuf_copy_split(const struct rte_mbuf *ms, struct rte_mbuf *md[],
477 uint16_t seglen[], uint8_t nb_seg)
479 uint32_t dlen, slen, tlen;
481 const struct rte_mbuf *m;
494 while (ms != NULL && i != nb_seg) {
497 slen = rte_pktmbuf_data_len(ms);
498 src = rte_pktmbuf_mtod(ms, const uint8_t *);
502 dlen = RTE_MIN(seglen[i], slen);
503 md[i]->data_len = dlen;
504 md[i]->next = (i + 1 == nb_seg) ? NULL : md[i + 1];
505 dst = rte_pktmbuf_mtod(md[i], uint8_t *);
508 len = RTE_MIN(slen, dlen);
509 memcpy(dst, src, len);
524 else if (tlen != m->pkt_len)
527 md[0]->nb_segs = nb_seg;
528 md[0]->pkt_len = tlen;
529 md[0]->vlan_tci = m->vlan_tci;
530 md[0]->vlan_tci_outer = m->vlan_tci_outer;
531 md[0]->ol_flags = m->ol_flags;
532 md[0]->tx_offload = m->tx_offload;
538 * Allocate a new mbuf with up to tx_pkt_nb_segs segments.
539 * Copy packet contents and offload information into then new segmented mbuf.
541 static struct rte_mbuf *
542 pkt_copy_split(const struct rte_mbuf *pkt)
545 uint32_t i, len, nb_seg;
546 struct rte_mempool *mp;
547 uint16_t seglen[RTE_MAX_SEGS_PER_PKT];
548 struct rte_mbuf *p, *md[RTE_MAX_SEGS_PER_PKT];
550 mp = current_fwd_lcore()->mbp;
552 if (tx_pkt_split == TX_PKT_SPLIT_RND)
553 nb_seg = random() % tx_pkt_nb_segs + 1;
555 nb_seg = tx_pkt_nb_segs;
557 memcpy(seglen, tx_pkt_seg_lengths, nb_seg * sizeof(seglen[0]));
559 /* calculate number of segments to use and their length. */
561 for (i = 0; i != nb_seg && len < pkt->pkt_len; i++) {
566 n = pkt->pkt_len - len;
568 /* update size of the last segment to fit rest of the packet */
576 p = rte_pktmbuf_alloc(mp);
579 "failed to allocate %u-th of %u mbuf "
580 "from mempool: %s\n",
581 nb_seg - i, nb_seg, mp->name);
586 if (rte_pktmbuf_tailroom(md[i]) < seglen[i]) {
587 RTE_LOG(ERR, USER1, "mempool %s, %u-th segment: "
588 "expected seglen: %u, "
589 "actual mbuf tailroom: %u\n",
590 mp->name, i, seglen[i],
591 rte_pktmbuf_tailroom(md[i]));
596 /* all mbufs successfully allocated, do copy */
598 rc = mbuf_copy_split(pkt, md, seglen, nb_seg);
601 "mbuf_copy_split for %p(len=%u, nb_seg=%hhu) "
602 "into %u segments failed with error code: %d\n",
603 pkt, pkt->pkt_len, pkt->nb_segs, nb_seg, rc);
605 /* figure out how many mbufs to free. */
609 /* free unused mbufs */
610 for (; i != nb_seg; i++) {
611 rte_pktmbuf_free_seg(md[i]);
619 * Receive a burst of packets, and for each packet:
620 * - parse packet, and try to recognize a supported packet type (1)
621 * - if it's not a supported packet type, don't touch the packet, else:
622 * - reprocess the checksum of all supported layers. This is done in SW
623 * or HW, depending on testpmd command line configuration
624 * - if TSO is enabled in testpmd command line, also flag the mbuf for TCP
625 * segmentation offload (this implies HW TCP checksum)
626 * Then transmit packets on the output port.
628 * (1) Supported packets are:
629 * Ether / (vlan) / IP|IP6 / UDP|TCP|SCTP .
630 * Ether / (vlan) / outer IP|IP6 / outer UDP / VxLAN / Ether / IP|IP6 /
632 * Ether / (vlan) / outer IP|IP6 / GRE / Ether / IP|IP6 / UDP|TCP|SCTP
633 * Ether / (vlan) / outer IP|IP6 / GRE / IP|IP6 / UDP|TCP|SCTP
634 * Ether / (vlan) / outer IP|IP6 / IP|IP6 / UDP|TCP|SCTP
636 * The testpmd command line for this forward engine sets the flags
637 * TESTPMD_TX_OFFLOAD_* in ports[tx_port].tx_ol_flags. They control
638 * wether a checksum must be calculated in software or in hardware. The
639 * IP, UDP, TCP and SCTP flags always concern the inner layer. The
640 * OUTER_IP is only useful for tunnel packets.
643 pkt_burst_checksum_forward(struct fwd_stream *fs)
645 struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
646 struct rte_port *txp;
647 struct rte_mbuf *m, *p;
648 struct ether_hdr *eth_hdr;
649 void *l3_hdr = NULL, *outer_l3_hdr = NULL; /* can be IPv4 or IPv6 */
653 uint64_t rx_ol_flags, tx_ol_flags;
654 uint16_t testpmd_ol_flags;
656 uint32_t rx_bad_ip_csum;
657 uint32_t rx_bad_l4_csum;
658 struct testpmd_offload_info info;
660 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
663 uint64_t core_cycles;
666 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
667 start_tsc = rte_rdtsc();
670 /* receive a burst of packet */
671 nb_rx = rte_eth_rx_burst(fs->rx_port, fs->rx_queue, pkts_burst,
673 if (unlikely(nb_rx == 0))
676 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS
677 fs->rx_burst_stats.pkt_burst_spread[nb_rx]++;
679 fs->rx_packets += nb_rx;
683 txp = &ports[fs->tx_port];
684 testpmd_ol_flags = txp->tx_ol_flags;
685 memset(&info, 0, sizeof(info));
686 info.tso_segsz = txp->tso_segsz;
687 info.tunnel_tso_segsz = txp->tunnel_tso_segsz;
689 for (i = 0; i < nb_rx; i++) {
690 if (likely(i < nb_rx - 1))
691 rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[i + 1],
696 info.pkt_len = rte_pktmbuf_pkt_len(m);
698 rx_ol_flags = m->ol_flags;
700 /* Update the L3/L4 checksum error packet statistics */
701 if ((rx_ol_flags & PKT_RX_IP_CKSUM_MASK) == PKT_RX_IP_CKSUM_BAD)
703 if ((rx_ol_flags & PKT_RX_L4_CKSUM_MASK) == PKT_RX_L4_CKSUM_BAD)
706 /* step 1: dissect packet, parsing optional vlan, ip4/ip6, vxlan
707 * and inner headers */
709 eth_hdr = rte_pktmbuf_mtod(m, struct ether_hdr *);
710 ether_addr_copy(&peer_eth_addrs[fs->peer_addr],
712 ether_addr_copy(&ports[fs->tx_port].eth_addr,
714 parse_ethernet(eth_hdr, &info);
715 l3_hdr = (char *)eth_hdr + info.l2_len;
717 /* check if it's a supported tunnel */
718 if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_PARSE_TUNNEL) {
719 if (info.l4_proto == IPPROTO_UDP) {
720 struct udp_hdr *udp_hdr;
722 udp_hdr = (struct udp_hdr *)((char *)l3_hdr +
724 parse_vxlan(udp_hdr, &info, m->packet_type);
726 tx_ol_flags |= PKT_TX_TUNNEL_VXLAN;
727 } else if (info.l4_proto == IPPROTO_GRE) {
728 struct simple_gre_hdr *gre_hdr;
730 gre_hdr = (struct simple_gre_hdr *)
731 ((char *)l3_hdr + info.l3_len);
732 parse_gre(gre_hdr, &info);
734 tx_ol_flags |= PKT_TX_TUNNEL_GRE;
735 } else if (info.l4_proto == IPPROTO_IPIP) {
738 encap_ip_hdr = (char *)l3_hdr + info.l3_len;
739 parse_encap_ip(encap_ip_hdr, &info);
741 tx_ol_flags |= PKT_TX_TUNNEL_IPIP;
745 /* update l3_hdr and outer_l3_hdr if a tunnel was parsed */
746 if (info.is_tunnel) {
747 outer_l3_hdr = l3_hdr;
748 l3_hdr = (char *)l3_hdr + info.outer_l3_len + info.l2_len;
751 /* step 2: depending on user command line configuration,
752 * recompute checksum either in software or flag the
753 * mbuf to offload the calculation to the NIC. If TSO
754 * is configured, prepare the mbuf for TCP segmentation. */
756 /* process checksums of inner headers first */
757 tx_ol_flags |= process_inner_cksums(l3_hdr, &info,
760 /* Then process outer headers if any. Note that the software
761 * checksum will be wrong if one of the inner checksums is
762 * processed in hardware. */
763 if (info.is_tunnel == 1) {
764 tx_ol_flags |= process_outer_cksums(outer_l3_hdr, &info,
766 !!(tx_ol_flags & PKT_TX_TCP_SEG));
769 /* step 3: fill the mbuf meta data (flags and header lengths) */
771 if (info.is_tunnel == 1) {
772 if (info.tunnel_tso_segsz ||
773 testpmd_ol_flags & TESTPMD_TX_OFFLOAD_OUTER_IP_CKSUM) {
774 m->outer_l2_len = info.outer_l2_len;
775 m->outer_l3_len = info.outer_l3_len;
776 m->l2_len = info.l2_len;
777 m->l3_len = info.l3_len;
778 m->l4_len = info.l4_len;
779 m->tso_segsz = info.tunnel_tso_segsz;
782 /* if there is a outer UDP cksum
783 processed in sw and the inner in hw,
784 the outer checksum will be wrong as
785 the payload will be modified by the
787 m->l2_len = info.outer_l2_len +
788 info.outer_l3_len + info.l2_len;
789 m->l3_len = info.l3_len;
790 m->l4_len = info.l4_len;
793 /* this is only useful if an offload flag is
794 * set, but it does not hurt to fill it in any
796 m->l2_len = info.l2_len;
797 m->l3_len = info.l3_len;
798 m->l4_len = info.l4_len;
799 m->tso_segsz = info.tso_segsz;
801 m->ol_flags = tx_ol_flags;
803 /* Do split & copy for the packet. */
804 if (tx_pkt_split != TX_PKT_SPLIT_OFF) {
805 p = pkt_copy_split(m);
813 /* if verbose mode is enabled, dump debug info */
814 if (verbose_level > 0) {
817 printf("-----------------\n");
818 printf("port=%u, mbuf=%p, pkt_len=%u, nb_segs=%hhu:\n",
819 fs->rx_port, m, m->pkt_len, m->nb_segs);
820 /* dump rx parsed packet info */
821 rte_get_rx_ol_flag_list(rx_ol_flags, buf, sizeof(buf));
822 printf("rx: l2_len=%d ethertype=%x l3_len=%d "
823 "l4_proto=%d l4_len=%d flags=%s\n",
824 info.l2_len, rte_be_to_cpu_16(info.ethertype),
825 info.l3_len, info.l4_proto, info.l4_len, buf);
826 if (rx_ol_flags & PKT_RX_LRO)
827 printf("rx: m->lro_segsz=%u\n", m->tso_segsz);
828 if (info.is_tunnel == 1)
829 printf("rx: outer_l2_len=%d outer_ethertype=%x "
830 "outer_l3_len=%d\n", info.outer_l2_len,
831 rte_be_to_cpu_16(info.outer_ethertype),
833 /* dump tx packet info */
834 if ((testpmd_ol_flags & (TESTPMD_TX_OFFLOAD_IP_CKSUM |
835 TESTPMD_TX_OFFLOAD_UDP_CKSUM |
836 TESTPMD_TX_OFFLOAD_TCP_CKSUM |
837 TESTPMD_TX_OFFLOAD_SCTP_CKSUM)) ||
839 printf("tx: m->l2_len=%d m->l3_len=%d "
841 m->l2_len, m->l3_len, m->l4_len);
842 if (info.is_tunnel == 1) {
843 if (testpmd_ol_flags &
844 TESTPMD_TX_OFFLOAD_OUTER_IP_CKSUM)
845 printf("tx: m->outer_l2_len=%d "
846 "m->outer_l3_len=%d\n",
849 if (info.tunnel_tso_segsz != 0 &&
850 (m->ol_flags & PKT_TX_TCP_SEG))
851 printf("tx: m->tso_segsz=%d\n",
853 } else if (info.tso_segsz != 0 &&
854 (m->ol_flags & PKT_TX_TCP_SEG))
855 printf("tx: m->tso_segsz=%d\n", m->tso_segsz);
856 rte_get_tx_ol_flag_list(m->ol_flags, buf, sizeof(buf));
857 printf("tx: flags=%s", buf);
861 nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, pkts_burst, nb_rx);
865 if (unlikely(nb_tx < nb_rx) && fs->retry_enabled) {
867 while (nb_tx < nb_rx && retry++ < burst_tx_retry_num) {
868 rte_delay_us(burst_tx_delay_time);
869 nb_tx += rte_eth_tx_burst(fs->tx_port, fs->tx_queue,
870 &pkts_burst[nb_tx], nb_rx - nb_tx);
873 fs->tx_packets += nb_tx;
874 fs->rx_bad_ip_csum += rx_bad_ip_csum;
875 fs->rx_bad_l4_csum += rx_bad_l4_csum;
877 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS
878 fs->tx_burst_stats.pkt_burst_spread[nb_tx]++;
880 if (unlikely(nb_tx < nb_rx)) {
881 fs->fwd_dropped += (nb_rx - nb_tx);
883 rte_pktmbuf_free(pkts_burst[nb_tx]);
884 } while (++nb_tx < nb_rx);
886 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
887 end_tsc = rte_rdtsc();
888 core_cycles = (end_tsc - start_tsc);
889 fs->core_cycles = (uint64_t) (fs->core_cycles + core_cycles);
893 struct fwd_engine csum_fwd_engine = {
894 .fwd_mode_name = "csum",
895 .port_fwd_begin = NULL,
896 .port_fwd_end = NULL,
897 .packet_fwd = pkt_burst_checksum_forward,