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>
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;
106 /* simplified GRE header */
107 struct simple_gre_hdr {
110 } __attribute__((__packed__));
113 get_psd_sum(void *l3_hdr, uint16_t ethertype, uint64_t ol_flags)
115 if (ethertype == _htons(ETHER_TYPE_IPv4))
116 return rte_ipv4_phdr_cksum(l3_hdr, ol_flags);
117 else /* assume ethertype == ETHER_TYPE_IPv6 */
118 return rte_ipv6_phdr_cksum(l3_hdr, ol_flags);
122 get_udptcp_checksum(void *l3_hdr, void *l4_hdr, uint16_t ethertype)
124 if (ethertype == _htons(ETHER_TYPE_IPv4))
125 return rte_ipv4_udptcp_cksum(l3_hdr, l4_hdr);
126 else /* assume ethertype == ETHER_TYPE_IPv6 */
127 return rte_ipv6_udptcp_cksum(l3_hdr, l4_hdr);
130 /* Parse an IPv4 header to fill l3_len, l4_len, and l4_proto */
132 parse_ipv4(struct ipv4_hdr *ipv4_hdr, struct testpmd_offload_info *info)
134 struct tcp_hdr *tcp_hdr;
136 info->l3_len = (ipv4_hdr->version_ihl & 0x0f) * 4;
137 info->l4_proto = ipv4_hdr->next_proto_id;
139 /* only fill l4_len for TCP, it's useful for TSO */
140 if (info->l4_proto == IPPROTO_TCP) {
141 tcp_hdr = (struct tcp_hdr *)((char *)ipv4_hdr + info->l3_len);
142 info->l4_len = (tcp_hdr->data_off & 0xf0) >> 2;
147 /* Parse an IPv6 header to fill l3_len, l4_len, and l4_proto */
149 parse_ipv6(struct ipv6_hdr *ipv6_hdr, struct testpmd_offload_info *info)
151 struct tcp_hdr *tcp_hdr;
153 info->l3_len = sizeof(struct ipv6_hdr);
154 info->l4_proto = ipv6_hdr->proto;
156 /* only fill l4_len for TCP, it's useful for TSO */
157 if (info->l4_proto == IPPROTO_TCP) {
158 tcp_hdr = (struct tcp_hdr *)((char *)ipv6_hdr + info->l3_len);
159 info->l4_len = (tcp_hdr->data_off & 0xf0) >> 2;
165 * Parse an ethernet header to fill the ethertype, l2_len, l3_len and
166 * ipproto. This function is able to recognize IPv4/IPv6 with one optional vlan
167 * header. The l4_len argument is only set in case of TCP (useful for TSO).
170 parse_ethernet(struct ether_hdr *eth_hdr, struct testpmd_offload_info *info)
172 struct ipv4_hdr *ipv4_hdr;
173 struct ipv6_hdr *ipv6_hdr;
175 info->l2_len = sizeof(struct ether_hdr);
176 info->ethertype = eth_hdr->ether_type;
178 if (info->ethertype == _htons(ETHER_TYPE_VLAN)) {
179 struct vlan_hdr *vlan_hdr = (struct vlan_hdr *)(eth_hdr + 1);
181 info->l2_len += sizeof(struct vlan_hdr);
182 info->ethertype = vlan_hdr->eth_proto;
185 switch (info->ethertype) {
186 case _htons(ETHER_TYPE_IPv4):
187 ipv4_hdr = (struct ipv4_hdr *) ((char *)eth_hdr + info->l2_len);
188 parse_ipv4(ipv4_hdr, info);
190 case _htons(ETHER_TYPE_IPv6):
191 ipv6_hdr = (struct ipv6_hdr *) ((char *)eth_hdr + info->l2_len);
192 parse_ipv6(ipv6_hdr, info);
202 /* Parse a vxlan header */
204 parse_vxlan(struct udp_hdr *udp_hdr,
205 struct testpmd_offload_info *info,
208 struct ether_hdr *eth_hdr;
210 /* check udp destination port, 4789 is the default vxlan port
211 * (rfc7348) or that the rx offload flag is set (i40e only
213 if (udp_hdr->dst_port != _htons(4789) &&
214 RTE_ETH_IS_TUNNEL_PKT(pkt_type) == 0)
218 info->outer_ethertype = info->ethertype;
219 info->outer_l2_len = info->l2_len;
220 info->outer_l3_len = info->l3_len;
221 info->outer_l4_proto = info->l4_proto;
223 eth_hdr = (struct ether_hdr *)((char *)udp_hdr +
224 sizeof(struct udp_hdr) +
225 sizeof(struct vxlan_hdr));
227 parse_ethernet(eth_hdr, info);
228 info->l2_len += ETHER_VXLAN_HLEN; /* add udp + vxlan */
231 /* Parse a gre header */
233 parse_gre(struct simple_gre_hdr *gre_hdr, struct testpmd_offload_info *info)
235 struct ether_hdr *eth_hdr;
236 struct ipv4_hdr *ipv4_hdr;
237 struct ipv6_hdr *ipv6_hdr;
240 /* check which fields are supported */
241 if ((gre_hdr->flags & _htons(~GRE_SUPPORTED_FIELDS)) != 0)
244 gre_len += sizeof(struct simple_gre_hdr);
246 if (gre_hdr->flags & _htons(GRE_KEY_PRESENT))
247 gre_len += GRE_KEY_LEN;
249 if (gre_hdr->proto == _htons(ETHER_TYPE_IPv4)) {
251 info->outer_ethertype = info->ethertype;
252 info->outer_l2_len = info->l2_len;
253 info->outer_l3_len = info->l3_len;
254 info->outer_l4_proto = info->l4_proto;
256 ipv4_hdr = (struct ipv4_hdr *)((char *)gre_hdr + gre_len);
258 parse_ipv4(ipv4_hdr, info);
259 info->ethertype = _htons(ETHER_TYPE_IPv4);
262 } else if (gre_hdr->proto == _htons(ETHER_TYPE_IPv6)) {
264 info->outer_ethertype = info->ethertype;
265 info->outer_l2_len = info->l2_len;
266 info->outer_l3_len = info->l3_len;
267 info->outer_l4_proto = info->l4_proto;
269 ipv6_hdr = (struct ipv6_hdr *)((char *)gre_hdr + gre_len);
271 info->ethertype = _htons(ETHER_TYPE_IPv6);
272 parse_ipv6(ipv6_hdr, info);
275 } else if (gre_hdr->proto == _htons(ETHER_TYPE_TEB)) {
277 info->outer_ethertype = info->ethertype;
278 info->outer_l2_len = info->l2_len;
279 info->outer_l3_len = info->l3_len;
280 info->outer_l4_proto = info->l4_proto;
282 eth_hdr = (struct ether_hdr *)((char *)gre_hdr + gre_len);
284 parse_ethernet(eth_hdr, info);
288 info->l2_len += gre_len;
292 /* Parse an encapsulated ip or ipv6 header */
294 parse_encap_ip(void *encap_ip, struct testpmd_offload_info *info)
296 struct ipv4_hdr *ipv4_hdr = encap_ip;
297 struct ipv6_hdr *ipv6_hdr = encap_ip;
300 ip_version = (ipv4_hdr->version_ihl & 0xf0) >> 4;
302 if (ip_version != 4 && ip_version != 6)
306 info->outer_ethertype = info->ethertype;
307 info->outer_l2_len = info->l2_len;
308 info->outer_l3_len = info->l3_len;
310 if (ip_version == 4) {
311 parse_ipv4(ipv4_hdr, info);
312 info->ethertype = _htons(ETHER_TYPE_IPv4);
314 parse_ipv6(ipv6_hdr, info);
315 info->ethertype = _htons(ETHER_TYPE_IPv6);
320 /* modify the IPv4 or IPv4 source address of a packet */
322 change_ip_addresses(void *l3_hdr, uint16_t ethertype)
324 struct ipv4_hdr *ipv4_hdr = l3_hdr;
325 struct ipv6_hdr *ipv6_hdr = l3_hdr;
327 if (ethertype == _htons(ETHER_TYPE_IPv4)) {
329 rte_cpu_to_be_32(rte_be_to_cpu_32(ipv4_hdr->src_addr) + 1);
330 } else if (ethertype == _htons(ETHER_TYPE_IPv6)) {
331 ipv6_hdr->src_addr[15] = ipv6_hdr->src_addr[15] + 1;
335 /* if possible, calculate the checksum of a packet in hw or sw,
336 * depending on the testpmd command line configuration */
338 process_inner_cksums(void *l3_hdr, const struct testpmd_offload_info *info,
339 uint16_t testpmd_ol_flags)
341 struct ipv4_hdr *ipv4_hdr = l3_hdr;
342 struct udp_hdr *udp_hdr;
343 struct tcp_hdr *tcp_hdr;
344 struct sctp_hdr *sctp_hdr;
345 uint64_t ol_flags = 0;
347 if (info->ethertype == _htons(ETHER_TYPE_IPv4)) {
349 ipv4_hdr->hdr_checksum = 0;
351 ol_flags |= PKT_TX_IPV4;
352 if (info->tso_segsz != 0 && info->l4_proto == IPPROTO_TCP) {
353 ol_flags |= PKT_TX_IP_CKSUM;
355 if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_IP_CKSUM)
356 ol_flags |= PKT_TX_IP_CKSUM;
358 ipv4_hdr->hdr_checksum =
359 rte_ipv4_cksum(ipv4_hdr);
361 } else if (info->ethertype == _htons(ETHER_TYPE_IPv6))
362 ol_flags |= PKT_TX_IPV6;
364 return 0; /* packet type not supported, nothing to do */
366 if (info->l4_proto == IPPROTO_UDP) {
367 udp_hdr = (struct udp_hdr *)((char *)l3_hdr + info->l3_len);
368 /* do not recalculate udp cksum if it was 0 */
369 if (udp_hdr->dgram_cksum != 0) {
370 udp_hdr->dgram_cksum = 0;
371 if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_UDP_CKSUM) {
372 ol_flags |= PKT_TX_UDP_CKSUM;
373 udp_hdr->dgram_cksum = get_psd_sum(l3_hdr,
374 info->ethertype, ol_flags);
376 udp_hdr->dgram_cksum =
377 get_udptcp_checksum(l3_hdr, udp_hdr,
381 } else if (info->l4_proto == IPPROTO_TCP) {
382 tcp_hdr = (struct tcp_hdr *)((char *)l3_hdr + info->l3_len);
384 if (info->tso_segsz != 0) {
385 ol_flags |= PKT_TX_TCP_SEG;
386 tcp_hdr->cksum = get_psd_sum(l3_hdr, info->ethertype,
388 } else if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_TCP_CKSUM) {
389 ol_flags |= PKT_TX_TCP_CKSUM;
390 tcp_hdr->cksum = get_psd_sum(l3_hdr, info->ethertype,
394 get_udptcp_checksum(l3_hdr, tcp_hdr,
397 } else if (info->l4_proto == IPPROTO_SCTP) {
398 sctp_hdr = (struct sctp_hdr *)((char *)l3_hdr + info->l3_len);
400 /* sctp payload must be a multiple of 4 to be
402 if ((testpmd_ol_flags & TESTPMD_TX_OFFLOAD_SCTP_CKSUM) &&
403 ((ipv4_hdr->total_length & 0x3) == 0)) {
404 ol_flags |= PKT_TX_SCTP_CKSUM;
406 /* XXX implement CRC32c, example available in
414 /* Calculate the checksum of outer header (only vxlan is supported,
415 * meaning IP + UDP). The caller already checked that it's a vxlan
418 process_outer_cksums(void *outer_l3_hdr, struct testpmd_offload_info *info,
419 uint16_t testpmd_ol_flags)
421 struct ipv4_hdr *ipv4_hdr = outer_l3_hdr;
422 struct ipv6_hdr *ipv6_hdr = outer_l3_hdr;
423 struct udp_hdr *udp_hdr;
424 uint64_t ol_flags = 0;
426 if (info->outer_ethertype == _htons(ETHER_TYPE_IPv4)) {
427 ipv4_hdr->hdr_checksum = 0;
428 ol_flags |= PKT_TX_OUTER_IPV4;
430 if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_OUTER_IP_CKSUM)
431 ol_flags |= PKT_TX_OUTER_IP_CKSUM;
433 ipv4_hdr->hdr_checksum = rte_ipv4_cksum(ipv4_hdr);
434 } else if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_OUTER_IP_CKSUM)
435 ol_flags |= PKT_TX_OUTER_IPV6;
437 if (info->outer_l4_proto != IPPROTO_UDP)
440 /* outer UDP checksum is always done in software as we have no
441 * hardware supporting it today, and no API for it. */
443 udp_hdr = (struct udp_hdr *)((char *)outer_l3_hdr + info->outer_l3_len);
444 /* do not recalculate udp cksum if it was 0 */
445 if (udp_hdr->dgram_cksum != 0) {
446 udp_hdr->dgram_cksum = 0;
447 if (info->outer_ethertype == _htons(ETHER_TYPE_IPv4))
448 udp_hdr->dgram_cksum =
449 rte_ipv4_udptcp_cksum(ipv4_hdr, udp_hdr);
451 udp_hdr->dgram_cksum =
452 rte_ipv6_udptcp_cksum(ipv6_hdr, udp_hdr);
460 * Performs actual copying.
461 * Returns number of segments in the destination mbuf on success,
462 * or negative error code on failure.
465 mbuf_copy_split(const struct rte_mbuf *ms, struct rte_mbuf *md[],
466 uint16_t seglen[], uint8_t nb_seg)
468 uint32_t dlen, slen, tlen;
470 const struct rte_mbuf *m;
483 while (ms != NULL && i != nb_seg) {
486 slen = rte_pktmbuf_data_len(ms);
487 src = rte_pktmbuf_mtod(ms, const uint8_t *);
491 dlen = RTE_MIN(seglen[i], slen);
492 md[i]->data_len = dlen;
493 md[i]->next = (i + 1 == nb_seg) ? NULL : md[i + 1];
494 dst = rte_pktmbuf_mtod(md[i], uint8_t *);
497 len = RTE_MIN(slen, dlen);
498 memcpy(dst, src, len);
513 else if (tlen != m->pkt_len)
516 md[0]->nb_segs = nb_seg;
517 md[0]->pkt_len = tlen;
518 md[0]->vlan_tci = m->vlan_tci;
519 md[0]->vlan_tci_outer = m->vlan_tci_outer;
520 md[0]->ol_flags = m->ol_flags;
521 md[0]->tx_offload = m->tx_offload;
527 * Allocate a new mbuf with up to tx_pkt_nb_segs segments.
528 * Copy packet contents and offload information into then new segmented mbuf.
530 static struct rte_mbuf *
531 pkt_copy_split(const struct rte_mbuf *pkt)
534 uint32_t i, len, nb_seg;
535 struct rte_mempool *mp;
536 uint16_t seglen[RTE_MAX_SEGS_PER_PKT];
537 struct rte_mbuf *p, *md[RTE_MAX_SEGS_PER_PKT];
539 mp = current_fwd_lcore()->mbp;
541 if (tx_pkt_split == TX_PKT_SPLIT_RND)
542 nb_seg = random() % tx_pkt_nb_segs + 1;
544 nb_seg = tx_pkt_nb_segs;
546 memcpy(seglen, tx_pkt_seg_lengths, nb_seg * sizeof(seglen[0]));
548 /* calculate number of segments to use and their length. */
550 for (i = 0; i != nb_seg && len < pkt->pkt_len; i++) {
555 n = pkt->pkt_len - len;
557 /* update size of the last segment to fit rest of the packet */
565 p = rte_pktmbuf_alloc(mp);
568 "failed to allocate %u-th of %u mbuf "
569 "from mempool: %s\n",
570 nb_seg - i, nb_seg, mp->name);
575 if (rte_pktmbuf_tailroom(md[i]) < seglen[i]) {
576 RTE_LOG(ERR, USER1, "mempool %s, %u-th segment: "
577 "expected seglen: %u, "
578 "actual mbuf tailroom: %u\n",
579 mp->name, i, seglen[i],
580 rte_pktmbuf_tailroom(md[i]));
585 /* all mbufs successfully allocated, do copy */
587 rc = mbuf_copy_split(pkt, md, seglen, nb_seg);
590 "mbuf_copy_split for %p(len=%u, nb_seg=%hhu) "
591 "into %u segments failed with error code: %d\n",
592 pkt, pkt->pkt_len, pkt->nb_segs, nb_seg, rc);
594 /* figure out how many mbufs to free. */
598 /* free unused mbufs */
599 for (; i != nb_seg; i++) {
600 rte_pktmbuf_free_seg(md[i]);
608 * Receive a burst of packets, and for each packet:
609 * - parse packet, and try to recognize a supported packet type (1)
610 * - if it's not a supported packet type, don't touch the packet, else:
611 * - modify the IPs in inner headers and in outer headers if any
612 * - reprocess the checksum of all supported layers. This is done in SW
613 * or HW, depending on testpmd command line configuration
614 * - if TSO is enabled in testpmd command line, also flag the mbuf for TCP
615 * segmentation offload (this implies HW TCP checksum)
616 * Then transmit packets on the output port.
618 * (1) Supported packets are:
619 * Ether / (vlan) / IP|IP6 / UDP|TCP|SCTP .
620 * Ether / (vlan) / outer IP|IP6 / outer UDP / VxLAN / Ether / IP|IP6 /
622 * Ether / (vlan) / outer IP|IP6 / GRE / Ether / IP|IP6 / UDP|TCP|SCTP
623 * Ether / (vlan) / outer IP|IP6 / GRE / IP|IP6 / UDP|TCP|SCTP
624 * Ether / (vlan) / outer IP|IP6 / IP|IP6 / UDP|TCP|SCTP
626 * The testpmd command line for this forward engine sets the flags
627 * TESTPMD_TX_OFFLOAD_* in ports[tx_port].tx_ol_flags. They control
628 * wether a checksum must be calculated in software or in hardware. The
629 * IP, UDP, TCP and SCTP flags always concern the inner layer. The
630 * OUTER_IP is only useful for tunnel packets.
633 pkt_burst_checksum_forward(struct fwd_stream *fs)
635 struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
636 struct rte_port *txp;
637 struct rte_mbuf *m, *p;
638 struct ether_hdr *eth_hdr;
639 void *l3_hdr = NULL, *outer_l3_hdr = NULL; /* can be IPv4 or IPv6 */
644 uint16_t testpmd_ol_flags;
646 uint32_t rx_bad_ip_csum;
647 uint32_t rx_bad_l4_csum;
648 struct testpmd_offload_info info;
650 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
653 uint64_t core_cycles;
656 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
657 start_tsc = rte_rdtsc();
660 /* receive a burst of packet */
661 nb_rx = rte_eth_rx_burst(fs->rx_port, fs->rx_queue, pkts_burst,
663 if (unlikely(nb_rx == 0))
666 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS
667 fs->rx_burst_stats.pkt_burst_spread[nb_rx]++;
669 fs->rx_packets += nb_rx;
673 txp = &ports[fs->tx_port];
674 testpmd_ol_flags = txp->tx_ol_flags;
675 memset(&info, 0, sizeof(info));
676 info.tso_segsz = txp->tso_segsz;
678 for (i = 0; i < nb_rx; i++) {
679 if (likely(i < nb_rx - 1))
680 rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[i + 1],
687 /* Update the L3/L4 checksum error packet statistics */
688 rx_bad_ip_csum += ((m->ol_flags & PKT_RX_IP_CKSUM_BAD) != 0);
689 rx_bad_l4_csum += ((m->ol_flags & PKT_RX_L4_CKSUM_BAD) != 0);
691 /* step 1: dissect packet, parsing optional vlan, ip4/ip6, vxlan
692 * and inner headers */
694 eth_hdr = rte_pktmbuf_mtod(m, struct ether_hdr *);
695 ether_addr_copy(&peer_eth_addrs[fs->peer_addr],
697 ether_addr_copy(&ports[fs->tx_port].eth_addr,
699 parse_ethernet(eth_hdr, &info);
700 l3_hdr = (char *)eth_hdr + info.l2_len;
702 /* check if it's a supported tunnel */
703 if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_PARSE_TUNNEL) {
704 if (info.l4_proto == IPPROTO_UDP) {
705 struct udp_hdr *udp_hdr;
706 udp_hdr = (struct udp_hdr *)((char *)l3_hdr +
708 parse_vxlan(udp_hdr, &info, m->packet_type);
709 } else if (info.l4_proto == IPPROTO_GRE) {
710 struct simple_gre_hdr *gre_hdr;
711 gre_hdr = (struct simple_gre_hdr *)
712 ((char *)l3_hdr + info.l3_len);
713 parse_gre(gre_hdr, &info);
714 } else if (info.l4_proto == IPPROTO_IPIP) {
716 encap_ip_hdr = (char *)l3_hdr + info.l3_len;
717 parse_encap_ip(encap_ip_hdr, &info);
721 /* update l3_hdr and outer_l3_hdr if a tunnel was parsed */
722 if (info.is_tunnel) {
723 outer_l3_hdr = l3_hdr;
724 l3_hdr = (char *)l3_hdr + info.outer_l3_len + info.l2_len;
727 /* step 2: change all source IPs (v4 or v6) so we need
728 * to recompute the chksums even if they were correct */
730 change_ip_addresses(l3_hdr, info.ethertype);
731 if (info.is_tunnel == 1)
732 change_ip_addresses(outer_l3_hdr, info.outer_ethertype);
734 /* step 3: depending on user command line configuration,
735 * recompute checksum either in software or flag the
736 * mbuf to offload the calculation to the NIC. If TSO
737 * is configured, prepare the mbuf for TCP segmentation. */
739 /* process checksums of inner headers first */
740 ol_flags |= process_inner_cksums(l3_hdr, &info, testpmd_ol_flags);
742 /* Then process outer headers if any. Note that the software
743 * checksum will be wrong if one of the inner checksums is
744 * processed in hardware. */
745 if (info.is_tunnel == 1) {
746 ol_flags |= process_outer_cksums(outer_l3_hdr, &info,
750 /* step 4: fill the mbuf meta data (flags and header lengths) */
752 if (info.is_tunnel == 1) {
753 if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_OUTER_IP_CKSUM) {
754 m->outer_l2_len = info.outer_l2_len;
755 m->outer_l3_len = info.outer_l3_len;
756 m->l2_len = info.l2_len;
757 m->l3_len = info.l3_len;
758 m->l4_len = info.l4_len;
761 /* if there is a outer UDP cksum
762 processed in sw and the inner in hw,
763 the outer checksum will be wrong as
764 the payload will be modified by the
766 m->l2_len = info.outer_l2_len +
767 info.outer_l3_len + info.l2_len;
768 m->l3_len = info.l3_len;
769 m->l4_len = info.l4_len;
772 /* this is only useful if an offload flag is
773 * set, but it does not hurt to fill it in any
775 m->l2_len = info.l2_len;
776 m->l3_len = info.l3_len;
777 m->l4_len = info.l4_len;
779 m->tso_segsz = info.tso_segsz;
780 m->ol_flags = ol_flags;
782 /* Do split & copy for the packet. */
783 if (tx_pkt_split != TX_PKT_SPLIT_OFF) {
784 p = pkt_copy_split(m);
792 /* if verbose mode is enabled, dump debug info */
793 if (verbose_level > 0) {
798 { PKT_TX_IP_CKSUM, PKT_TX_IP_CKSUM },
799 { PKT_TX_UDP_CKSUM, PKT_TX_L4_MASK },
800 { PKT_TX_TCP_CKSUM, PKT_TX_L4_MASK },
801 { PKT_TX_SCTP_CKSUM, PKT_TX_L4_MASK },
802 { PKT_TX_IPV4, PKT_TX_IPV4 },
803 { PKT_TX_IPV6, PKT_TX_IPV6 },
804 { PKT_TX_OUTER_IP_CKSUM, PKT_TX_OUTER_IP_CKSUM },
805 { PKT_TX_OUTER_IPV4, PKT_TX_OUTER_IPV4 },
806 { PKT_TX_OUTER_IPV6, PKT_TX_OUTER_IPV6 },
807 { PKT_TX_TCP_SEG, PKT_TX_TCP_SEG },
812 printf("-----------------\n");
813 printf("mbuf=%p, pkt_len=%u, nb_segs=%hhu:\n",
814 m, m->pkt_len, m->nb_segs);
815 /* dump rx parsed packet info */
816 printf("rx: l2_len=%d ethertype=%x l3_len=%d "
817 "l4_proto=%d l4_len=%d\n",
818 info.l2_len, rte_be_to_cpu_16(info.ethertype),
819 info.l3_len, info.l4_proto, info.l4_len);
820 if (info.is_tunnel == 1)
821 printf("rx: outer_l2_len=%d outer_ethertype=%x "
822 "outer_l3_len=%d\n", info.outer_l2_len,
823 rte_be_to_cpu_16(info.outer_ethertype),
825 /* dump tx packet info */
826 if ((testpmd_ol_flags & (TESTPMD_TX_OFFLOAD_IP_CKSUM |
827 TESTPMD_TX_OFFLOAD_UDP_CKSUM |
828 TESTPMD_TX_OFFLOAD_TCP_CKSUM |
829 TESTPMD_TX_OFFLOAD_SCTP_CKSUM)) ||
831 printf("tx: m->l2_len=%d m->l3_len=%d "
833 m->l2_len, m->l3_len, m->l4_len);
834 if ((info.is_tunnel == 1) &&
835 (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_OUTER_IP_CKSUM))
836 printf("tx: m->outer_l2_len=%d m->outer_l3_len=%d\n",
837 m->outer_l2_len, m->outer_l3_len);
838 if (info.tso_segsz != 0)
839 printf("tx: m->tso_segsz=%d\n", m->tso_segsz);
840 printf("tx: flags=");
841 for (j = 0; j < sizeof(tx_flags)/sizeof(*tx_flags); j++) {
842 name = rte_get_tx_ol_flag_name(tx_flags[j].flag);
843 if ((m->ol_flags & tx_flags[j].mask) ==
850 nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, pkts_burst, nb_rx);
854 if (unlikely(nb_tx < nb_rx) && fs->retry_enabled) {
856 while (nb_tx < nb_rx && retry++ < burst_tx_retry_num) {
857 rte_delay_us(burst_tx_delay_time);
858 nb_tx += rte_eth_tx_burst(fs->tx_port, fs->tx_queue,
859 &pkts_burst[nb_tx], nb_rx - nb_tx);
862 fs->tx_packets += nb_tx;
863 fs->rx_bad_ip_csum += rx_bad_ip_csum;
864 fs->rx_bad_l4_csum += rx_bad_l4_csum;
866 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS
867 fs->tx_burst_stats.pkt_burst_spread[nb_tx]++;
869 if (unlikely(nb_tx < nb_rx)) {
870 fs->fwd_dropped += (nb_rx - nb_tx);
872 rte_pktmbuf_free(pkts_burst[nb_tx]);
873 } while (++nb_tx < nb_rx);
875 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
876 end_tsc = rte_rdtsc();
877 core_cycles = (end_tsc - start_tsc);
878 fs->core_cycles = (uint64_t) (fs->core_cycles + core_cycles);
882 struct fwd_engine csum_fwd_engine = {
883 .fwd_mode_name = "csum",
884 .port_fwd_begin = NULL,
885 .port_fwd_end = NULL,
886 .packet_fwd = pkt_burst_checksum_forward,