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 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 sctp_hdr *)((char *)l3_hdr + info->l3_len);
440 /* sctp payload must be a multiple of 4 to be
442 if ((tx_offloads & DEV_TX_OFFLOAD_SCTP_CKSUM) &&
443 ((ipv4_hdr->total_length & 0x3) == 0)) {
444 ol_flags |= PKT_TX_SCTP_CKSUM;
446 /* XXX implement CRC32c, example available in
454 /* Calculate the checksum of outer header */
456 process_outer_cksums(void *outer_l3_hdr, struct testpmd_offload_info *info,
457 uint64_t tx_offloads, int tso_enabled)
459 struct rte_ipv4_hdr *ipv4_hdr = outer_l3_hdr;
460 struct rte_ipv6_hdr *ipv6_hdr = outer_l3_hdr;
461 struct udp_hdr *udp_hdr;
462 uint64_t ol_flags = 0;
464 if (info->outer_ethertype == _htons(RTE_ETHER_TYPE_IPv4)) {
465 ipv4_hdr->hdr_checksum = 0;
466 ol_flags |= PKT_TX_OUTER_IPV4;
468 if (tx_offloads & DEV_TX_OFFLOAD_OUTER_IPV4_CKSUM)
469 ol_flags |= PKT_TX_OUTER_IP_CKSUM;
471 ipv4_hdr->hdr_checksum = rte_ipv4_cksum(ipv4_hdr);
473 ol_flags |= PKT_TX_OUTER_IPV6;
475 if (info->outer_l4_proto != IPPROTO_UDP)
478 /* Skip SW outer UDP checksum generation if HW supports it */
479 if (tx_offloads & DEV_TX_OFFLOAD_OUTER_UDP_CKSUM) {
480 ol_flags |= PKT_TX_OUTER_UDP_CKSUM;
484 udp_hdr = (struct udp_hdr *)((char *)outer_l3_hdr + info->outer_l3_len);
486 /* outer UDP checksum is done in software. In the other side, for
487 * UDP tunneling, like VXLAN or Geneve, outer UDP checksum can be
490 * If a packet will be TSOed into small packets by NIC, we cannot
491 * set/calculate a non-zero checksum, because it will be a wrong
492 * value after the packet be split into several small packets.
495 udp_hdr->dgram_cksum = 0;
497 /* do not recalculate udp cksum if it was 0 */
498 if (udp_hdr->dgram_cksum != 0) {
499 udp_hdr->dgram_cksum = 0;
500 if (info->outer_ethertype == _htons(RTE_ETHER_TYPE_IPv4))
501 udp_hdr->dgram_cksum =
502 rte_ipv4_udptcp_cksum(ipv4_hdr, udp_hdr);
504 udp_hdr->dgram_cksum =
505 rte_ipv6_udptcp_cksum(ipv6_hdr, udp_hdr);
513 * Performs actual copying.
514 * Returns number of segments in the destination mbuf on success,
515 * or negative error code on failure.
518 mbuf_copy_split(const struct rte_mbuf *ms, struct rte_mbuf *md[],
519 uint16_t seglen[], uint8_t nb_seg)
521 uint32_t dlen, slen, tlen;
523 const struct rte_mbuf *m;
536 while (ms != NULL && i != nb_seg) {
539 slen = rte_pktmbuf_data_len(ms);
540 src = rte_pktmbuf_mtod(ms, const uint8_t *);
544 dlen = RTE_MIN(seglen[i], slen);
545 md[i]->data_len = dlen;
546 md[i]->next = (i + 1 == nb_seg) ? NULL : md[i + 1];
547 dst = rte_pktmbuf_mtod(md[i], uint8_t *);
550 len = RTE_MIN(slen, dlen);
551 memcpy(dst, src, len);
566 else if (tlen != m->pkt_len)
569 md[0]->nb_segs = nb_seg;
570 md[0]->pkt_len = tlen;
571 md[0]->vlan_tci = m->vlan_tci;
572 md[0]->vlan_tci_outer = m->vlan_tci_outer;
573 md[0]->ol_flags = m->ol_flags;
574 md[0]->tx_offload = m->tx_offload;
580 * Allocate a new mbuf with up to tx_pkt_nb_segs segments.
581 * Copy packet contents and offload information into the new segmented mbuf.
583 static struct rte_mbuf *
584 pkt_copy_split(const struct rte_mbuf *pkt)
587 uint32_t i, len, nb_seg;
588 struct rte_mempool *mp;
589 uint16_t seglen[RTE_MAX_SEGS_PER_PKT];
590 struct rte_mbuf *p, *md[RTE_MAX_SEGS_PER_PKT];
592 mp = current_fwd_lcore()->mbp;
594 if (tx_pkt_split == TX_PKT_SPLIT_RND)
595 nb_seg = random() % tx_pkt_nb_segs + 1;
597 nb_seg = tx_pkt_nb_segs;
599 memcpy(seglen, tx_pkt_seg_lengths, nb_seg * sizeof(seglen[0]));
601 /* calculate number of segments to use and their length. */
603 for (i = 0; i != nb_seg && len < pkt->pkt_len; i++) {
608 n = pkt->pkt_len - len;
610 /* update size of the last segment to fit rest of the packet */
618 p = rte_pktmbuf_alloc(mp);
621 "failed to allocate %u-th of %u mbuf "
622 "from mempool: %s\n",
623 nb_seg - i, nb_seg, mp->name);
628 if (rte_pktmbuf_tailroom(md[i]) < seglen[i]) {
629 TESTPMD_LOG(ERR, "mempool %s, %u-th segment: "
630 "expected seglen: %u, "
631 "actual mbuf tailroom: %u\n",
632 mp->name, i, seglen[i],
633 rte_pktmbuf_tailroom(md[i]));
638 /* all mbufs successfully allocated, do copy */
640 rc = mbuf_copy_split(pkt, md, seglen, nb_seg);
643 "mbuf_copy_split for %p(len=%u, nb_seg=%u) "
644 "into %u segments failed with error code: %d\n",
645 pkt, pkt->pkt_len, pkt->nb_segs, nb_seg, rc);
647 /* figure out how many mbufs to free. */
651 /* free unused mbufs */
652 for (; i != nb_seg; i++) {
653 rte_pktmbuf_free_seg(md[i]);
661 * Receive a burst of packets, and for each packet:
662 * - parse packet, and try to recognize a supported packet type (1)
663 * - if it's not a supported packet type, don't touch the packet, else:
664 * - reprocess the checksum of all supported layers. This is done in SW
665 * or HW, depending on testpmd command line configuration
666 * - if TSO is enabled in testpmd command line, also flag the mbuf for TCP
667 * segmentation offload (this implies HW TCP checksum)
668 * Then transmit packets on the output port.
670 * (1) Supported packets are:
671 * Ether / (vlan) / IP|IP6 / UDP|TCP|SCTP .
672 * Ether / (vlan) / outer IP|IP6 / outer UDP / VxLAN / Ether / IP|IP6 /
674 * Ether / (vlan) / outer IP|IP6 / outer UDP / VXLAN-GPE / Ether / IP|IP6 /
676 * Ether / (vlan) / outer IP|IP6 / outer UDP / VXLAN-GPE / IP|IP6 /
678 * Ether / (vlan) / outer IP|IP6 / GRE / Ether / IP|IP6 / UDP|TCP|SCTP
679 * Ether / (vlan) / outer IP|IP6 / GRE / IP|IP6 / UDP|TCP|SCTP
680 * Ether / (vlan) / outer IP|IP6 / IP|IP6 / UDP|TCP|SCTP
682 * The testpmd command line for this forward engine sets the flags
683 * TESTPMD_TX_OFFLOAD_* in ports[tx_port].tx_ol_flags. They control
684 * wether a checksum must be calculated in software or in hardware. The
685 * IP, UDP, TCP and SCTP flags always concern the inner layer. The
686 * OUTER_IP is only useful for tunnel packets.
689 pkt_burst_checksum_forward(struct fwd_stream *fs)
691 struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
692 struct rte_mbuf *gso_segments[GSO_MAX_PKT_BURST];
693 struct rte_gso_ctx *gso_ctx;
694 struct rte_mbuf **tx_pkts_burst;
695 struct rte_port *txp;
696 struct rte_mbuf *m, *p;
697 struct rte_ether_hdr *eth_hdr;
698 void *l3_hdr = NULL, *outer_l3_hdr = NULL; /* can be IPv4 or IPv6 */
700 uint16_t gro_pkts_num;
706 uint64_t rx_ol_flags, tx_ol_flags;
707 uint64_t tx_offloads;
709 uint32_t rx_bad_ip_csum;
710 uint32_t rx_bad_l4_csum;
711 uint32_t rx_bad_outer_l4_csum;
712 struct testpmd_offload_info info;
713 uint16_t nb_segments = 0;
716 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
719 uint64_t core_cycles;
722 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
723 start_tsc = rte_rdtsc();
726 /* receive a burst of packet */
727 nb_rx = rte_eth_rx_burst(fs->rx_port, fs->rx_queue, pkts_burst,
729 if (unlikely(nb_rx == 0))
731 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS
732 fs->rx_burst_stats.pkt_burst_spread[nb_rx]++;
734 fs->rx_packets += nb_rx;
737 rx_bad_outer_l4_csum = 0;
738 gro_enable = gro_ports[fs->rx_port].enable;
740 txp = &ports[fs->tx_port];
741 tx_offloads = txp->dev_conf.txmode.offloads;
742 memset(&info, 0, sizeof(info));
743 info.tso_segsz = txp->tso_segsz;
744 info.tunnel_tso_segsz = txp->tunnel_tso_segsz;
745 if (gso_ports[fs->tx_port].enable)
748 for (i = 0; i < nb_rx; i++) {
749 if (likely(i < nb_rx - 1))
750 rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[i + 1],
755 info.pkt_len = rte_pktmbuf_pkt_len(m);
756 tx_ol_flags = m->ol_flags &
757 (IND_ATTACHED_MBUF | EXT_ATTACHED_MBUF);
758 rx_ol_flags = m->ol_flags;
760 /* Update the L3/L4 checksum error packet statistics */
761 if ((rx_ol_flags & PKT_RX_IP_CKSUM_MASK) == PKT_RX_IP_CKSUM_BAD)
763 if ((rx_ol_flags & PKT_RX_L4_CKSUM_MASK) == PKT_RX_L4_CKSUM_BAD)
765 if (rx_ol_flags & PKT_RX_OUTER_L4_CKSUM_BAD)
766 rx_bad_outer_l4_csum += 1;
768 /* step 1: dissect packet, parsing optional vlan, ip4/ip6, vxlan
769 * and inner headers */
771 eth_hdr = rte_pktmbuf_mtod(m, struct rte_ether_hdr *);
772 rte_ether_addr_copy(&peer_eth_addrs[fs->peer_addr],
774 rte_ether_addr_copy(&ports[fs->tx_port].eth_addr,
776 parse_ethernet(eth_hdr, &info);
777 l3_hdr = (char *)eth_hdr + info.l2_len;
779 /* check if it's a supported tunnel */
780 if (txp->parse_tunnel) {
781 if (info.l4_proto == IPPROTO_UDP) {
782 struct udp_hdr *udp_hdr;
784 udp_hdr = (struct udp_hdr *)((char *)l3_hdr +
786 parse_vxlan_gpe(udp_hdr, &info);
787 if (info.is_tunnel) {
788 tx_ol_flags |= PKT_TX_TUNNEL_VXLAN_GPE;
790 parse_vxlan(udp_hdr, &info,
796 } else if (info.l4_proto == IPPROTO_GRE) {
797 struct simple_gre_hdr *gre_hdr;
799 gre_hdr = (struct simple_gre_hdr *)
800 ((char *)l3_hdr + info.l3_len);
801 parse_gre(gre_hdr, &info);
803 tx_ol_flags |= PKT_TX_TUNNEL_GRE;
804 } else if (info.l4_proto == IPPROTO_IPIP) {
807 encap_ip_hdr = (char *)l3_hdr + info.l3_len;
808 parse_encap_ip(encap_ip_hdr, &info);
810 tx_ol_flags |= PKT_TX_TUNNEL_IPIP;
814 /* update l3_hdr and outer_l3_hdr if a tunnel was parsed */
815 if (info.is_tunnel) {
816 outer_l3_hdr = l3_hdr;
817 l3_hdr = (char *)l3_hdr + info.outer_l3_len + info.l2_len;
820 /* step 2: depending on user command line configuration,
821 * recompute checksum either in software or flag the
822 * mbuf to offload the calculation to the NIC. If TSO
823 * is configured, prepare the mbuf for TCP segmentation. */
825 /* process checksums of inner headers first */
826 tx_ol_flags |= process_inner_cksums(l3_hdr, &info,
829 /* Then process outer headers if any. Note that the software
830 * checksum will be wrong if one of the inner checksums is
831 * processed in hardware. */
832 if (info.is_tunnel == 1) {
833 tx_ol_flags |= process_outer_cksums(outer_l3_hdr, &info,
835 !!(tx_ol_flags & PKT_TX_TCP_SEG));
838 /* step 3: fill the mbuf meta data (flags and header lengths) */
841 if (info.is_tunnel == 1) {
842 if (info.tunnel_tso_segsz ||
844 DEV_TX_OFFLOAD_OUTER_IPV4_CKSUM) ||
846 DEV_TX_OFFLOAD_OUTER_UDP_CKSUM) ||
847 (tx_ol_flags & PKT_TX_OUTER_IPV6)) {
848 m->outer_l2_len = info.outer_l2_len;
849 m->outer_l3_len = info.outer_l3_len;
850 m->l2_len = info.l2_len;
851 m->l3_len = info.l3_len;
852 m->l4_len = info.l4_len;
853 m->tso_segsz = info.tunnel_tso_segsz;
856 /* if there is a outer UDP cksum
857 processed in sw and the inner in hw,
858 the outer checksum will be wrong as
859 the payload will be modified by the
861 m->l2_len = info.outer_l2_len +
862 info.outer_l3_len + info.l2_len;
863 m->l3_len = info.l3_len;
864 m->l4_len = info.l4_len;
867 /* this is only useful if an offload flag is
868 * set, but it does not hurt to fill it in any
870 m->l2_len = info.l2_len;
871 m->l3_len = info.l3_len;
872 m->l4_len = info.l4_len;
873 m->tso_segsz = info.tso_segsz;
875 m->ol_flags = tx_ol_flags;
877 /* Do split & copy for the packet. */
878 if (tx_pkt_split != TX_PKT_SPLIT_OFF) {
879 p = pkt_copy_split(m);
887 /* if verbose mode is enabled, dump debug info */
888 if (verbose_level > 0) {
891 printf("-----------------\n");
892 printf("port=%u, mbuf=%p, pkt_len=%u, nb_segs=%u:\n",
893 fs->rx_port, m, m->pkt_len, m->nb_segs);
894 /* dump rx parsed packet info */
895 rte_get_rx_ol_flag_list(rx_ol_flags, buf, sizeof(buf));
896 printf("rx: l2_len=%d ethertype=%x l3_len=%d "
897 "l4_proto=%d l4_len=%d flags=%s\n",
898 info.l2_len, rte_be_to_cpu_16(info.ethertype),
899 info.l3_len, info.l4_proto, info.l4_len, buf);
900 if (rx_ol_flags & PKT_RX_LRO)
901 printf("rx: m->lro_segsz=%u\n", m->tso_segsz);
902 if (info.is_tunnel == 1)
903 printf("rx: outer_l2_len=%d outer_ethertype=%x "
904 "outer_l3_len=%d\n", info.outer_l2_len,
905 rte_be_to_cpu_16(info.outer_ethertype),
907 /* dump tx packet info */
908 if ((tx_offloads & (DEV_TX_OFFLOAD_IPV4_CKSUM |
909 DEV_TX_OFFLOAD_UDP_CKSUM |
910 DEV_TX_OFFLOAD_TCP_CKSUM |
911 DEV_TX_OFFLOAD_SCTP_CKSUM)) ||
913 printf("tx: m->l2_len=%d m->l3_len=%d "
915 m->l2_len, m->l3_len, m->l4_len);
916 if (info.is_tunnel == 1) {
918 DEV_TX_OFFLOAD_OUTER_IPV4_CKSUM) ||
920 DEV_TX_OFFLOAD_OUTER_UDP_CKSUM) ||
921 (tx_ol_flags & PKT_TX_OUTER_IPV6))
922 printf("tx: m->outer_l2_len=%d "
923 "m->outer_l3_len=%d\n",
926 if (info.tunnel_tso_segsz != 0 &&
927 (m->ol_flags & PKT_TX_TCP_SEG))
928 printf("tx: m->tso_segsz=%d\n",
930 } else if (info.tso_segsz != 0 &&
931 (m->ol_flags & PKT_TX_TCP_SEG))
932 printf("tx: m->tso_segsz=%d\n", m->tso_segsz);
933 rte_get_tx_ol_flag_list(m->ol_flags, buf, sizeof(buf));
934 printf("tx: flags=%s", buf);
939 if (unlikely(gro_enable)) {
940 if (gro_flush_cycles == GRO_DEFAULT_FLUSH_CYCLES) {
941 nb_rx = rte_gro_reassemble_burst(pkts_burst, nb_rx,
942 &(gro_ports[fs->rx_port].param));
944 gro_ctx = current_fwd_lcore()->gro_ctx;
945 nb_rx = rte_gro_reassemble(pkts_burst, nb_rx, gro_ctx);
947 if (++fs->gro_times >= gro_flush_cycles) {
948 gro_pkts_num = rte_gro_get_pkt_count(gro_ctx);
949 if (gro_pkts_num > MAX_PKT_BURST - nb_rx)
950 gro_pkts_num = MAX_PKT_BURST - nb_rx;
952 nb_rx += rte_gro_timeout_flush(gro_ctx, 0,
961 if (gso_ports[fs->tx_port].enable == 0)
962 tx_pkts_burst = pkts_burst;
964 gso_ctx = &(current_fwd_lcore()->gso_ctx);
965 gso_ctx->gso_size = gso_max_segment_size;
966 for (i = 0; i < nb_rx; i++) {
967 ret = rte_gso_segment(pkts_burst[i], gso_ctx,
968 &gso_segments[nb_segments],
969 GSO_MAX_PKT_BURST - nb_segments);
973 TESTPMD_LOG(DEBUG, "Unable to segment packet");
974 rte_pktmbuf_free(pkts_burst[i]);
978 tx_pkts_burst = gso_segments;
982 nb_prep = rte_eth_tx_prepare(fs->tx_port, fs->tx_queue,
983 tx_pkts_burst, nb_rx);
984 if (nb_prep != nb_rx)
985 printf("Preparing packet burst to transmit failed: %s\n",
986 rte_strerror(rte_errno));
988 nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, tx_pkts_burst,
994 if (unlikely(nb_tx < nb_rx) && fs->retry_enabled) {
996 while (nb_tx < nb_rx && retry++ < burst_tx_retry_num) {
997 rte_delay_us(burst_tx_delay_time);
998 nb_tx += rte_eth_tx_burst(fs->tx_port, fs->tx_queue,
999 &tx_pkts_burst[nb_tx], nb_rx - nb_tx);
1002 fs->tx_packets += nb_tx;
1003 fs->rx_bad_ip_csum += rx_bad_ip_csum;
1004 fs->rx_bad_l4_csum += rx_bad_l4_csum;
1005 fs->rx_bad_outer_l4_csum += rx_bad_outer_l4_csum;
1007 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS
1008 fs->tx_burst_stats.pkt_burst_spread[nb_tx]++;
1010 if (unlikely(nb_tx < nb_rx)) {
1011 fs->fwd_dropped += (nb_rx - nb_tx);
1013 rte_pktmbuf_free(tx_pkts_burst[nb_tx]);
1014 } while (++nb_tx < nb_rx);
1017 #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
1018 end_tsc = rte_rdtsc();
1019 core_cycles = (end_tsc - start_tsc);
1020 fs->core_cycles = (uint64_t) (fs->core_cycles + core_cycles);
1024 struct fwd_engine csum_fwd_engine = {
1025 .fwd_mode_name = "csum",
1026 .port_fwd_begin = NULL,
1027 .port_fwd_end = NULL,
1028 .packet_fwd = pkt_burst_checksum_forward,