app/test-pmd/csumonly.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2014 Intel Corporation.
   3  * Copyright 2014 6WIND S.A.
   4  */
   5
   6 #include <stdarg.h>
   7 #include <stdio.h>
   8 #include <errno.h>
   9 #include <stdint.h>
  10 #include <unistd.h>
  11 #include <inttypes.h>
  12
  13 #include <sys/queue.h>
  14 #include <sys/stat.h>
  15
  16 #include <rte_common.h>
  17 #include <rte_byteorder.h>
  18 #include <rte_log.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>
  24 #include <rte_eal.h>
  25 #include <rte_per_lcore.h>
  26 #include <rte_lcore.h>
  27 #include <rte_branch_prediction.h>
  28 #include <rte_mempool.h>
  29 #include <rte_mbuf.h>
  30 #include <rte_interrupts.h>
  31 #include <rte_pci.h>
  32 #include <rte_ether.h>
  33 #include <rte_ethdev.h>
  34 #include <rte_ip.h>
  35 #include <rte_tcp.h>
  36 #include <rte_udp.h>
  37 #include <rte_vxlan.h>
  38 #include <rte_sctp.h>
  39 #include <rte_gtp.h>
  40 #include <rte_prefetch.h>
  41 #include <rte_string_fns.h>
  42 #include <rte_flow.h>
  43 #ifdef RTE_LIB_GRO
  44 #include <rte_gro.h>
  45 #endif
  46 #ifdef RTE_LIB_GSO
  47 #include <rte_gso.h>
  48 #endif
  49 #include <rte_geneve.h>
  50
  51 #include "testpmd.h"
  52
  53 #define IP_DEFTTL  64   /* from RFC 1340. */
  54
  55 #define GRE_CHECKSUM_PRESENT    0x8000
  56 #define GRE_KEY_PRESENT         0x2000
  57 #define GRE_SEQUENCE_PRESENT    0x1000
  58 #define GRE_EXT_LEN             4
  59 #define GRE_SUPPORTED_FIELDS    (GRE_CHECKSUM_PRESENT | GRE_KEY_PRESENT |\
  60                                  GRE_SEQUENCE_PRESENT)
  61
  62 /* We cannot use rte_cpu_to_be_16() on a constant in a switch/case */
  63 #if RTE_BYTE_ORDER == RTE_LITTLE_ENDIAN
  64 #define _htons(x) ((uint16_t)((((x) & 0x00ffU) << 8) | (((x) & 0xff00U) >> 8)))
  65 #else
  66 #define _htons(x) (x)
  67 #endif
  68
  69 uint16_t vxlan_gpe_udp_port = RTE_VXLAN_GPE_DEFAULT_PORT;
  70 uint16_t geneve_udp_port = RTE_GENEVE_DEFAULT_PORT;
  71
  72 /* structure that caches offload info for the current packet */
  73 struct testpmd_offload_info {
  74         uint16_t ethertype;
  75 #ifdef RTE_LIB_GSO
  76         uint8_t gso_enable;
  77 #endif
  78         uint16_t l2_len;
  79         uint16_t l3_len;
  80         uint16_t l4_len;
  81         uint8_t l4_proto;
  82         uint8_t is_tunnel;
  83         uint16_t outer_ethertype;
  84         uint16_t outer_l2_len;
  85         uint16_t outer_l3_len;
  86         uint8_t outer_l4_proto;
  87         uint16_t tso_segsz;
  88         uint16_t tunnel_tso_segsz;
  89         uint32_t pkt_len;
  90 };
  91
  92 /* simplified GRE header */
  93 struct simple_gre_hdr {
  94         uint16_t flags;
  95         uint16_t proto;
  96 } __rte_packed;
  97
  98 static uint16_t
  99 get_udptcp_checksum(struct rte_mbuf *m, void *l3_hdr, uint16_t l4_off,
 100                     uint16_t ethertype)
 101 {
 102         if (ethertype == _htons(RTE_ETHER_TYPE_IPV4))
 103                 return rte_ipv4_udptcp_cksum_mbuf(m, l3_hdr, l4_off);
 104         else /* assume ethertype == RTE_ETHER_TYPE_IPV6 */
 105                 return rte_ipv6_udptcp_cksum_mbuf(m, l3_hdr, l4_off);
 106 }
 107
 108 /* Parse an IPv4 header to fill l3_len, l4_len, and l4_proto */
 109 static void
 110 parse_ipv4(struct rte_ipv4_hdr *ipv4_hdr, struct testpmd_offload_info *info)
 111 {
 112         struct rte_tcp_hdr *tcp_hdr;
 113
 114         info->l3_len = rte_ipv4_hdr_len(ipv4_hdr);
 115         info->l4_proto = ipv4_hdr->next_proto_id;
 116
 117         /* only fill l4_len for TCP, it's useful for TSO */
 118         if (info->l4_proto == IPPROTO_TCP) {
 119                 tcp_hdr = (struct rte_tcp_hdr *)
 120                         ((char *)ipv4_hdr + info->l3_len);
 121                 info->l4_len = (tcp_hdr->data_off & 0xf0) >> 2;
 122         } else if (info->l4_proto == IPPROTO_UDP)
 123                 info->l4_len = sizeof(struct rte_udp_hdr);
 124         else
 125                 info->l4_len = 0;
 126 }
 127
 128 /* Parse an IPv6 header to fill l3_len, l4_len, and l4_proto */
 129 static void
 130 parse_ipv6(struct rte_ipv6_hdr *ipv6_hdr, struct testpmd_offload_info *info)
 131 {
 132         struct rte_tcp_hdr *tcp_hdr;
 133
 134         info->l3_len = sizeof(struct rte_ipv6_hdr);
 135         info->l4_proto = ipv6_hdr->proto;
 136
 137         /* only fill l4_len for TCP, it's useful for TSO */
 138         if (info->l4_proto == IPPROTO_TCP) {
 139                 tcp_hdr = (struct rte_tcp_hdr *)
 140                         ((char *)ipv6_hdr + info->l3_len);
 141                 info->l4_len = (tcp_hdr->data_off & 0xf0) >> 2;
 142         } else if (info->l4_proto == IPPROTO_UDP)
 143                 info->l4_len = sizeof(struct rte_udp_hdr);
 144         else
 145                 info->l4_len = 0;
 146 }
 147
 148 /*
 149  * Parse an ethernet header to fill the ethertype, l2_len, l3_len and
 150  * ipproto. This function is able to recognize IPv4/IPv6 with optional VLAN
 151  * headers. The l4_len argument is only set in case of TCP (useful for TSO).
 152  */
 153 static void
 154 parse_ethernet(struct rte_ether_hdr *eth_hdr, struct testpmd_offload_info *info)
 155 {
 156         struct rte_ipv4_hdr *ipv4_hdr;
 157         struct rte_ipv6_hdr *ipv6_hdr;
 158         struct rte_vlan_hdr *vlan_hdr;
 159
 160         info->l2_len = sizeof(struct rte_ether_hdr);
 161         info->ethertype = eth_hdr->ether_type;
 162
 163         while (info->ethertype == _htons(RTE_ETHER_TYPE_VLAN) ||
 164                info->ethertype == _htons(RTE_ETHER_TYPE_QINQ)) {
 165                 vlan_hdr = (struct rte_vlan_hdr *)
 166                         ((char *)eth_hdr + info->l2_len);
 167                 info->l2_len  += sizeof(struct rte_vlan_hdr);
 168                 info->ethertype = vlan_hdr->eth_proto;
 169         }
 170
 171         switch (info->ethertype) {
 172         case _htons(RTE_ETHER_TYPE_IPV4):
 173                 ipv4_hdr = (struct rte_ipv4_hdr *)
 174                         ((char *)eth_hdr + info->l2_len);
 175                 parse_ipv4(ipv4_hdr, info);
 176                 break;
 177         case _htons(RTE_ETHER_TYPE_IPV6):
 178                 ipv6_hdr = (struct rte_ipv6_hdr *)
 179                         ((char *)eth_hdr + info->l2_len);
 180                 parse_ipv6(ipv6_hdr, info);
 181                 break;
 182         default:
 183                 info->l4_len = 0;
 184                 info->l3_len = 0;
 185                 info->l4_proto = 0;
 186                 break;
 187         }
 188 }
 189
 190 /* Fill in outer layers length */
 191 static void
 192 update_tunnel_outer(struct testpmd_offload_info *info)
 193 {
 194         info->is_tunnel = 1;
 195         info->outer_ethertype = info->ethertype;
 196         info->outer_l2_len = info->l2_len;
 197         info->outer_l3_len = info->l3_len;
 198         info->outer_l4_proto = info->l4_proto;
 199 }
 200
 201 /*
 202  * Parse a GTP protocol header.
 203  * No optional fields and next extension header type.
 204  */
 205 static void
 206 parse_gtp(struct rte_udp_hdr *udp_hdr,
 207           struct testpmd_offload_info *info)
 208 {
 209         struct rte_ipv4_hdr *ipv4_hdr;
 210         struct rte_ipv6_hdr *ipv6_hdr;
 211         struct rte_gtp_hdr *gtp_hdr;
 212         uint8_t gtp_len = sizeof(*gtp_hdr);
 213         uint8_t ip_ver;
 214
 215         /* Check udp destination port. */
 216         if (udp_hdr->dst_port != _htons(RTE_GTPC_UDP_PORT) &&
 217             udp_hdr->src_port != _htons(RTE_GTPC_UDP_PORT) &&
 218             udp_hdr->dst_port != _htons(RTE_GTPU_UDP_PORT))
 219                 return;
 220
 221         update_tunnel_outer(info);
 222         info->l2_len = 0;
 223
 224         gtp_hdr = (struct rte_gtp_hdr *)((char *)udp_hdr +
 225                   sizeof(struct rte_udp_hdr));
 226         if (gtp_hdr->e || gtp_hdr->s || gtp_hdr->pn)
 227                 gtp_len += sizeof(struct rte_gtp_hdr_ext_word);
 228         /*
 229          * Check message type. If message type is 0xff, it is
 230          * a GTP data packet. If not, it is a GTP control packet
 231          */
 232         if (gtp_hdr->msg_type == 0xff) {
 233                 ip_ver = *(uint8_t *)((char *)gtp_hdr + gtp_len);
 234                 ip_ver = (ip_ver) & 0xf0;
 235
 236                 if (ip_ver == RTE_GTP_TYPE_IPV4) {
 237                         ipv4_hdr = (struct rte_ipv4_hdr *)((char *)gtp_hdr +
 238                                    gtp_len);
 239                         info->ethertype = _htons(RTE_ETHER_TYPE_IPV4);
 240                         parse_ipv4(ipv4_hdr, info);
 241                 } else if (ip_ver == RTE_GTP_TYPE_IPV6) {
 242                         ipv6_hdr = (struct rte_ipv6_hdr *)((char *)gtp_hdr +
 243                                    gtp_len);
 244                         info->ethertype = _htons(RTE_ETHER_TYPE_IPV6);
 245                         parse_ipv6(ipv6_hdr, info);
 246                 }
 247         } else {
 248                 info->ethertype = 0;
 249                 info->l4_len = 0;
 250                 info->l3_len = 0;
 251                 info->l4_proto = 0;
 252         }
 253
 254         info->l2_len += RTE_ETHER_GTP_HLEN;
 255 }
 256
 257 /* Parse a vxlan header */
 258 static void
 259 parse_vxlan(struct rte_udp_hdr *udp_hdr,
 260             struct testpmd_offload_info *info)
 261 {
 262         struct rte_ether_hdr *eth_hdr;
 263
 264         /* check udp destination port, RTE_VXLAN_DEFAULT_PORT (4789) is the
 265          * default vxlan port (rfc7348) or that the rx offload flag is set
 266          * (i40e only currently)
 267          */
 268         if (udp_hdr->dst_port != _htons(RTE_VXLAN_DEFAULT_PORT))
 269                 return;
 270
 271         update_tunnel_outer(info);
 272
 273         eth_hdr = (struct rte_ether_hdr *)((char *)udp_hdr +
 274                 sizeof(struct rte_udp_hdr) +
 275                 sizeof(struct rte_vxlan_hdr));
 276
 277         parse_ethernet(eth_hdr, info);
 278         info->l2_len += RTE_ETHER_VXLAN_HLEN; /* add udp + vxlan */
 279 }
 280
 281 /* Parse a vxlan-gpe header */
 282 static void
 283 parse_vxlan_gpe(struct rte_udp_hdr *udp_hdr,
 284             struct testpmd_offload_info *info)
 285 {
 286         struct rte_ether_hdr *eth_hdr;
 287         struct rte_ipv4_hdr *ipv4_hdr;
 288         struct rte_ipv6_hdr *ipv6_hdr;
 289         struct rte_vxlan_gpe_hdr *vxlan_gpe_hdr;
 290         uint8_t vxlan_gpe_len = sizeof(*vxlan_gpe_hdr);
 291
 292         /* Check udp destination port. */
 293         if (udp_hdr->dst_port != _htons(vxlan_gpe_udp_port))
 294                 return;
 295
 296         vxlan_gpe_hdr = (struct rte_vxlan_gpe_hdr *)((char *)udp_hdr +
 297                                 sizeof(struct rte_udp_hdr));
 298
 299         if (!vxlan_gpe_hdr->proto || vxlan_gpe_hdr->proto ==
 300             RTE_VXLAN_GPE_TYPE_IPV4) {
 301                 update_tunnel_outer(info);
 302
 303                 ipv4_hdr = (struct rte_ipv4_hdr *)((char *)vxlan_gpe_hdr +
 304                            vxlan_gpe_len);
 305
 306                 parse_ipv4(ipv4_hdr, info);
 307                 info->ethertype = _htons(RTE_ETHER_TYPE_IPV4);
 308                 info->l2_len = 0;
 309
 310         } else if (vxlan_gpe_hdr->proto == RTE_VXLAN_GPE_TYPE_IPV6) {
 311                 update_tunnel_outer(info);
 312
 313                 ipv6_hdr = (struct rte_ipv6_hdr *)((char *)vxlan_gpe_hdr +
 314                            vxlan_gpe_len);
 315
 316                 info->ethertype = _htons(RTE_ETHER_TYPE_IPV6);
 317                 parse_ipv6(ipv6_hdr, info);
 318                 info->l2_len = 0;
 319
 320         } else if (vxlan_gpe_hdr->proto == RTE_VXLAN_GPE_TYPE_ETH) {
 321                 update_tunnel_outer(info);
 322
 323                 eth_hdr = (struct rte_ether_hdr *)((char *)vxlan_gpe_hdr +
 324                           vxlan_gpe_len);
 325
 326                 parse_ethernet(eth_hdr, info);
 327         } else
 328                 return;
 329
 330         info->l2_len += RTE_ETHER_VXLAN_GPE_HLEN;
 331 }
 332
 333 /* Parse a geneve header */
 334 static void
 335 parse_geneve(struct rte_udp_hdr *udp_hdr,
 336             struct testpmd_offload_info *info)
 337 {
 338         struct rte_ether_hdr *eth_hdr;
 339         struct rte_ipv4_hdr *ipv4_hdr;
 340         struct rte_ipv6_hdr *ipv6_hdr;
 341         struct rte_geneve_hdr *geneve_hdr;
 342         uint16_t geneve_len;
 343
 344         /* Check udp destination port. */
 345         if (udp_hdr->dst_port != _htons(geneve_udp_port))
 346                 return;
 347
 348         geneve_hdr = (struct rte_geneve_hdr *)((char *)udp_hdr +
 349                                 sizeof(struct rte_udp_hdr));
 350         geneve_len = sizeof(struct rte_geneve_hdr) + geneve_hdr->opt_len * 4;
 351         if (!geneve_hdr->proto || geneve_hdr->proto ==
 352             _htons(RTE_ETHER_TYPE_IPV4)) {
 353                 update_tunnel_outer(info);
 354                 ipv4_hdr = (struct rte_ipv4_hdr *)((char *)geneve_hdr +
 355                            geneve_len);
 356                 parse_ipv4(ipv4_hdr, info);
 357                 info->ethertype = _htons(RTE_ETHER_TYPE_IPV4);
 358                 info->l2_len = 0;
 359         } else if (geneve_hdr->proto == _htons(RTE_ETHER_TYPE_IPV6)) {
 360                 update_tunnel_outer(info);
 361                 ipv6_hdr = (struct rte_ipv6_hdr *)((char *)geneve_hdr +
 362                            geneve_len);
 363                 info->ethertype = _htons(RTE_ETHER_TYPE_IPV6);
 364                 parse_ipv6(ipv6_hdr, info);
 365                 info->l2_len = 0;
 366
 367         } else if (geneve_hdr->proto == _htons(RTE_GENEVE_TYPE_ETH)) {
 368                 update_tunnel_outer(info);
 369                 eth_hdr = (struct rte_ether_hdr *)((char *)geneve_hdr +
 370                           geneve_len);
 371                 parse_ethernet(eth_hdr, info);
 372         } else
 373                 return;
 374
 375         info->l2_len +=
 376                 (sizeof(struct rte_udp_hdr) + sizeof(struct rte_geneve_hdr) +
 377                 ((struct rte_geneve_hdr *)geneve_hdr)->opt_len * 4);
 378 }
 379
 380 /* Parse a gre header */
 381 static void
 382 parse_gre(struct simple_gre_hdr *gre_hdr, struct testpmd_offload_info *info)
 383 {
 384         struct rte_ether_hdr *eth_hdr;
 385         struct rte_ipv4_hdr *ipv4_hdr;
 386         struct rte_ipv6_hdr *ipv6_hdr;
 387         uint8_t gre_len = 0;
 388
 389         gre_len += sizeof(struct simple_gre_hdr);
 390
 391         if (gre_hdr->flags & _htons(GRE_KEY_PRESENT))
 392                 gre_len += GRE_EXT_LEN;
 393         if (gre_hdr->flags & _htons(GRE_SEQUENCE_PRESENT))
 394                 gre_len += GRE_EXT_LEN;
 395         if (gre_hdr->flags & _htons(GRE_CHECKSUM_PRESENT))
 396                 gre_len += GRE_EXT_LEN;
 397
 398         if (gre_hdr->proto == _htons(RTE_ETHER_TYPE_IPV4)) {
 399                 update_tunnel_outer(info);
 400
 401                 ipv4_hdr = (struct rte_ipv4_hdr *)((char *)gre_hdr + gre_len);
 402
 403                 parse_ipv4(ipv4_hdr, info);
 404                 info->ethertype = _htons(RTE_ETHER_TYPE_IPV4);
 405                 info->l2_len = 0;
 406
 407         } else if (gre_hdr->proto == _htons(RTE_ETHER_TYPE_IPV6)) {
 408                 update_tunnel_outer(info);
 409
 410                 ipv6_hdr = (struct rte_ipv6_hdr *)((char *)gre_hdr + gre_len);
 411
 412                 info->ethertype = _htons(RTE_ETHER_TYPE_IPV6);
 413                 parse_ipv6(ipv6_hdr, info);
 414                 info->l2_len = 0;
 415
 416         } else if (gre_hdr->proto == _htons(RTE_ETHER_TYPE_TEB)) {
 417                 update_tunnel_outer(info);
 418
 419                 eth_hdr = (struct rte_ether_hdr *)((char *)gre_hdr + gre_len);
 420
 421                 parse_ethernet(eth_hdr, info);
 422         } else
 423                 return;
 424
 425         info->l2_len += gre_len;
 426 }
 427
 428
 429 /* Parse an encapsulated ip or ipv6 header */
 430 static void
 431 parse_encap_ip(void *encap_ip, struct testpmd_offload_info *info)
 432 {
 433         struct rte_ipv4_hdr *ipv4_hdr = encap_ip;
 434         struct rte_ipv6_hdr *ipv6_hdr = encap_ip;
 435         uint8_t ip_version;
 436
 437         ip_version = (ipv4_hdr->version_ihl & 0xf0) >> 4;
 438
 439         if (ip_version != 4 && ip_version != 6)
 440                 return;
 441
 442         info->is_tunnel = 1;
 443         info->outer_ethertype = info->ethertype;
 444         info->outer_l2_len = info->l2_len;
 445         info->outer_l3_len = info->l3_len;
 446
 447         if (ip_version == 4) {
 448                 parse_ipv4(ipv4_hdr, info);
 449                 info->ethertype = _htons(RTE_ETHER_TYPE_IPV4);
 450         } else {
 451                 parse_ipv6(ipv6_hdr, info);
 452                 info->ethertype = _htons(RTE_ETHER_TYPE_IPV6);
 453         }
 454         info->l2_len = 0;
 455 }
 456
 457 /* if possible, calculate the checksum of a packet in hw or sw,
 458  * depending on the testpmd command line configuration */
 459 static uint64_t
 460 process_inner_cksums(void *l3_hdr, const struct testpmd_offload_info *info,
 461         uint64_t tx_offloads, struct rte_mbuf *m)
 462 {
 463         struct rte_ipv4_hdr *ipv4_hdr = l3_hdr;
 464         struct rte_udp_hdr *udp_hdr;
 465         struct rte_tcp_hdr *tcp_hdr;
 466         struct rte_sctp_hdr *sctp_hdr;
 467         uint64_t ol_flags = 0;
 468         uint32_t max_pkt_len, tso_segsz = 0;
 469         uint16_t l4_off;
 470
 471         /* ensure packet is large enough to require tso */
 472         if (!info->is_tunnel) {
 473                 max_pkt_len = info->l2_len + info->l3_len + info->l4_len +
 474                         info->tso_segsz;
 475                 if (info->tso_segsz != 0 && info->pkt_len > max_pkt_len)
 476                         tso_segsz = info->tso_segsz;
 477         } else {
 478                 max_pkt_len = info->outer_l2_len + info->outer_l3_len +
 479                         info->l2_len + info->l3_len + info->l4_len +
 480                         info->tunnel_tso_segsz;
 481                 if (info->tunnel_tso_segsz != 0 && info->pkt_len > max_pkt_len)
 482                         tso_segsz = info->tunnel_tso_segsz;
 483         }
 484
 485         if (info->ethertype == _htons(RTE_ETHER_TYPE_IPV4)) {
 486                 ipv4_hdr = l3_hdr;
 487
 488                 ol_flags |= RTE_MBUF_F_TX_IPV4;
 489                 if (info->l4_proto == IPPROTO_TCP && tso_segsz) {
 490                         ol_flags |= RTE_MBUF_F_TX_IP_CKSUM;
 491                 } else {
 492                         if (tx_offloads & RTE_ETH_TX_OFFLOAD_IPV4_CKSUM) {
 493                                 ol_flags |= RTE_MBUF_F_TX_IP_CKSUM;
 494                         } else {
 495                                 ipv4_hdr->hdr_checksum = 0;
 496                                 ipv4_hdr->hdr_checksum =
 497                                         rte_ipv4_cksum(ipv4_hdr);
 498                         }
 499                 }
 500         } else if (info->ethertype == _htons(RTE_ETHER_TYPE_IPV6))
 501                 ol_flags |= RTE_MBUF_F_TX_IPV6;
 502         else
 503                 return 0; /* packet type not supported, nothing to do */
 504
 505         if (info->l4_proto == IPPROTO_UDP) {
 506                 udp_hdr = (struct rte_udp_hdr *)((char *)l3_hdr + info->l3_len);
 507                 /* do not recalculate udp cksum if it was 0 */
 508                 if (udp_hdr->dgram_cksum != 0) {
 509                         if (tx_offloads & RTE_ETH_TX_OFFLOAD_UDP_CKSUM) {
 510                                 ol_flags |= RTE_MBUF_F_TX_UDP_CKSUM;
 511                         } else {
 512                                 if (info->is_tunnel)
 513                                         l4_off = info->outer_l2_len +
 514                                                  info->outer_l3_len +
 515                                                  info->l2_len + info->l3_len;
 516                                 else
 517                                         l4_off = info->l2_len + info->l3_len;
 518                                 udp_hdr->dgram_cksum = 0;
 519                                 udp_hdr->dgram_cksum =
 520                                         get_udptcp_checksum(m, l3_hdr, l4_off,
 521                                                 info->ethertype);
 522                         }
 523                 }
 524 #ifdef RTE_LIB_GSO
 525                 if (info->gso_enable)
 526                         ol_flags |= RTE_MBUF_F_TX_UDP_SEG;
 527 #endif
 528         } else if (info->l4_proto == IPPROTO_TCP) {
 529                 tcp_hdr = (struct rte_tcp_hdr *)((char *)l3_hdr + info->l3_len);
 530                 if (tso_segsz)
 531                         ol_flags |= RTE_MBUF_F_TX_TCP_SEG;
 532                 else if (tx_offloads & RTE_ETH_TX_OFFLOAD_TCP_CKSUM) {
 533                         ol_flags |= RTE_MBUF_F_TX_TCP_CKSUM;
 534                 } else {
 535                         if (info->is_tunnel)
 536                                 l4_off = info->outer_l2_len + info->outer_l3_len +
 537                                          info->l2_len + info->l3_len;
 538                         else
 539                                 l4_off = info->l2_len + info->l3_len;
 540                         tcp_hdr->cksum = 0;
 541                         tcp_hdr->cksum =
 542                                 get_udptcp_checksum(m, l3_hdr, l4_off,
 543                                         info->ethertype);
 544                 }
 545 #ifdef RTE_LIB_GSO
 546                 if (info->gso_enable)
 547                         ol_flags |= RTE_MBUF_F_TX_TCP_SEG;
 548 #endif
 549         } else if (info->l4_proto == IPPROTO_SCTP) {
 550                 sctp_hdr = (struct rte_sctp_hdr *)
 551                         ((char *)l3_hdr + info->l3_len);
 552                 /* sctp payload must be a multiple of 4 to be
 553                  * offloaded */
 554                 if ((tx_offloads & RTE_ETH_TX_OFFLOAD_SCTP_CKSUM) &&
 555                         ((ipv4_hdr->total_length & 0x3) == 0)) {
 556                         ol_flags |= RTE_MBUF_F_TX_SCTP_CKSUM;
 557                 } else {
 558                         sctp_hdr->cksum = 0;
 559                         /* XXX implement CRC32c, example available in
 560                          * RFC3309 */
 561                 }
 562         }
 563
 564         return ol_flags;
 565 }
 566
 567 /* Calculate the checksum of outer header */
 568 static uint64_t
 569 process_outer_cksums(void *outer_l3_hdr, struct testpmd_offload_info *info,
 570         uint64_t tx_offloads, int tso_enabled, struct rte_mbuf *m)
 571 {
 572         struct rte_ipv4_hdr *ipv4_hdr = outer_l3_hdr;
 573         struct rte_ipv6_hdr *ipv6_hdr = outer_l3_hdr;
 574         struct rte_udp_hdr *udp_hdr;
 575         uint64_t ol_flags = 0;
 576
 577         if (info->outer_ethertype == _htons(RTE_ETHER_TYPE_IPV4)) {
 578                 ipv4_hdr->hdr_checksum = 0;
 579                 ol_flags |= RTE_MBUF_F_TX_OUTER_IPV4;
 580
 581                 if (tx_offloads & RTE_ETH_TX_OFFLOAD_OUTER_IPV4_CKSUM)
 582                         ol_flags |= RTE_MBUF_F_TX_OUTER_IP_CKSUM;
 583                 else
 584                         ipv4_hdr->hdr_checksum = rte_ipv4_cksum(ipv4_hdr);
 585         } else
 586                 ol_flags |= RTE_MBUF_F_TX_OUTER_IPV6;
 587
 588         if (info->outer_l4_proto != IPPROTO_UDP)
 589                 return ol_flags;
 590
 591         udp_hdr = (struct rte_udp_hdr *)
 592                 ((char *)outer_l3_hdr + info->outer_l3_len);
 593
 594         if (tso_enabled)
 595                 ol_flags |= RTE_MBUF_F_TX_TCP_SEG;
 596
 597         /* Skip SW outer UDP checksum generation if HW supports it */
 598         if (tx_offloads & RTE_ETH_TX_OFFLOAD_OUTER_UDP_CKSUM) {
 599                 if (info->outer_ethertype == _htons(RTE_ETHER_TYPE_IPV4))
 600                         udp_hdr->dgram_cksum
 601                                 = rte_ipv4_phdr_cksum(ipv4_hdr, ol_flags);
 602                 else
 603                         udp_hdr->dgram_cksum
 604                                 = rte_ipv6_phdr_cksum(ipv6_hdr, ol_flags);
 605
 606                 ol_flags |= RTE_MBUF_F_TX_OUTER_UDP_CKSUM;
 607                 return ol_flags;
 608         }
 609
 610         /* outer UDP checksum is done in software. In the other side, for
 611          * UDP tunneling, like VXLAN or Geneve, outer UDP checksum can be
 612          * set to zero.
 613          *
 614          * If a packet will be TSOed into small packets by NIC, we cannot
 615          * set/calculate a non-zero checksum, because it will be a wrong
 616          * value after the packet be split into several small packets.
 617          */
 618         if (tso_enabled)
 619                 udp_hdr->dgram_cksum = 0;
 620
 621         /* do not recalculate udp cksum if it was 0 */
 622         if (udp_hdr->dgram_cksum != 0) {
 623                 udp_hdr->dgram_cksum = 0;
 624                 udp_hdr->dgram_cksum = get_udptcp_checksum(m, outer_l3_hdr,
 625                                         info->outer_l2_len + info->outer_l3_len,
 626                                         info->outer_ethertype);
 627         }
 628
 629         return ol_flags;
 630 }
 631
 632 /*
 633  * Helper function.
 634  * Performs actual copying.
 635  * Returns number of segments in the destination mbuf on success,
 636  * or negative error code on failure.
 637  */
 638 static int
 639 mbuf_copy_split(const struct rte_mbuf *ms, struct rte_mbuf *md[],
 640         uint16_t seglen[], uint8_t nb_seg)
 641 {
 642         uint32_t dlen, slen, tlen;
 643         uint32_t i, len;
 644         const struct rte_mbuf *m;
 645         const uint8_t *src;
 646         uint8_t *dst;
 647
 648         dlen = 0;
 649         slen = 0;
 650         tlen = 0;
 651
 652         dst = NULL;
 653         src = NULL;
 654
 655         m = ms;
 656         i = 0;
 657         while (ms != NULL && i != nb_seg) {
 658
 659                 if (slen == 0) {
 660                         slen = rte_pktmbuf_data_len(ms);
 661                         src = rte_pktmbuf_mtod(ms, const uint8_t *);
 662                 }
 663
 664                 if (dlen == 0) {
 665                         dlen = RTE_MIN(seglen[i], slen);
 666                         md[i]->data_len = dlen;
 667                         md[i]->next = (i + 1 == nb_seg) ? NULL : md[i + 1];
 668                         dst = rte_pktmbuf_mtod(md[i], uint8_t *);
 669                 }
 670
 671                 len = RTE_MIN(slen, dlen);
 672                 memcpy(dst, src, len);
 673                 tlen += len;
 674                 slen -= len;
 675                 dlen -= len;
 676                 src += len;
 677                 dst += len;
 678
 679                 if (slen == 0)
 680                         ms = ms->next;
 681                 if (dlen == 0)
 682                         i++;
 683         }
 684
 685         if (ms != NULL)
 686                 return -ENOBUFS;
 687         else if (tlen != m->pkt_len)
 688                 return -EINVAL;
 689
 690         md[0]->nb_segs = nb_seg;
 691         md[0]->pkt_len = tlen;
 692         md[0]->vlan_tci = m->vlan_tci;
 693         md[0]->vlan_tci_outer = m->vlan_tci_outer;
 694         md[0]->ol_flags = m->ol_flags;
 695         md[0]->tx_offload = m->tx_offload;
 696
 697         return nb_seg;
 698 }
 699
 700 /*
 701  * Allocate a new mbuf with up to tx_pkt_nb_segs segments.
 702  * Copy packet contents and offload information into the new segmented mbuf.
 703  */
 704 static struct rte_mbuf *
 705 pkt_copy_split(const struct rte_mbuf *pkt)
 706 {
 707         int32_t n, rc;
 708         uint32_t i, len, nb_seg;
 709         struct rte_mempool *mp;
 710         uint16_t seglen[RTE_MAX_SEGS_PER_PKT];
 711         struct rte_mbuf *p, *md[RTE_MAX_SEGS_PER_PKT];
 712
 713         mp = current_fwd_lcore()->mbp;
 714
 715         if (tx_pkt_split == TX_PKT_SPLIT_RND)
 716                 nb_seg = rte_rand() % tx_pkt_nb_segs + 1;
 717         else
 718                 nb_seg = tx_pkt_nb_segs;
 719
 720         memcpy(seglen, tx_pkt_seg_lengths, nb_seg * sizeof(seglen[0]));
 721
 722         /* calculate number of segments to use and their length. */
 723         len = 0;
 724         for (i = 0; i != nb_seg && len < pkt->pkt_len; i++) {
 725                 len += seglen[i];
 726                 md[i] = NULL;
 727         }
 728
 729         n = pkt->pkt_len - len;
 730
 731         /* update size of the last segment to fit rest of the packet */
 732         if (n >= 0) {
 733                 seglen[i - 1] += n;
 734                 len += n;
 735         }
 736
 737         nb_seg = i;
 738         while (i != 0) {
 739                 p = rte_pktmbuf_alloc(mp);
 740                 if (p == NULL) {
 741                         TESTPMD_LOG(ERR,
 742                                 "failed to allocate %u-th of %u mbuf "
 743                                 "from mempool: %s\n",
 744                                 nb_seg - i, nb_seg, mp->name);
 745                         break;
 746                 }
 747
 748                 md[--i] = p;
 749                 if (rte_pktmbuf_tailroom(md[i]) < seglen[i]) {
 750                         TESTPMD_LOG(ERR, "mempool %s, %u-th segment: "
 751                                 "expected seglen: %u, "
 752                                 "actual mbuf tailroom: %u\n",
 753                                 mp->name, i, seglen[i],
 754                                 rte_pktmbuf_tailroom(md[i]));
 755                         break;
 756                 }
 757         }
 758
 759         /* all mbufs successfully allocated, do copy */
 760         if (i == 0) {
 761                 rc = mbuf_copy_split(pkt, md, seglen, nb_seg);
 762                 if (rc < 0)
 763                         TESTPMD_LOG(ERR,
 764                                 "mbuf_copy_split for %p(len=%u, nb_seg=%u) "
 765                                 "into %u segments failed with error code: %d\n",
 766                                 pkt, pkt->pkt_len, pkt->nb_segs, nb_seg, rc);
 767
 768                 /* figure out how many mbufs to free. */
 769                 i = RTE_MAX(rc, 0);
 770         }
 771
 772         /* free unused mbufs */
 773         for (; i != nb_seg; i++) {
 774                 rte_pktmbuf_free_seg(md[i]);
 775                 md[i] = NULL;
 776         }
 777
 778         return md[0];
 779 }
 780
 781 /*
 782  * Receive a burst of packets, and for each packet:
 783  *  - parse packet, and try to recognize a supported packet type (1)
 784  *  - if it's not a supported packet type, don't touch the packet, else:
 785  *  - reprocess the checksum of all supported layers. This is done in SW
 786  *    or HW, depending on testpmd command line configuration
 787  *  - if TSO is enabled in testpmd command line, also flag the mbuf for TCP
 788  *    segmentation offload (this implies HW TCP checksum)
 789  * Then transmit packets on the output port.
 790  *
 791  * (1) Supported packets are:
 792  *   Ether / (vlan) / IP|IP6 / UDP|TCP|SCTP .
 793  *   Ether / (vlan) / outer IP|IP6 / outer UDP / VxLAN / Ether / IP|IP6 /
 794  *           UDP|TCP|SCTP
 795  *   Ether / (vlan) / outer IP|IP6 / outer UDP / VXLAN-GPE / Ether / IP|IP6 /
 796  *           UDP|TCP|SCTP
 797  *   Ether / (vlan) / outer IP|IP6 / outer UDP / VXLAN-GPE / IP|IP6 /
 798  *           UDP|TCP|SCTP
 799  *   Ether / (vlan) / outer IP / outer UDP / GTP / IP|IP6 / UDP|TCP|SCTP
 800  *   Ether / (vlan) / outer IP|IP6 / GRE / Ether / IP|IP6 / UDP|TCP|SCTP
 801  *   Ether / (vlan) / outer IP|IP6 / GRE / IP|IP6 / UDP|TCP|SCTP
 802  *   Ether / (vlan) / outer IP|IP6 / IP|IP6 / UDP|TCP|SCTP
 803  *
 804  * The testpmd command line for this forward engine sets the flags
 805  * TESTPMD_TX_OFFLOAD_* in ports[tx_port].tx_ol_flags. They control
 806  * whether a checksum must be calculated in software or in hardware. The
 807  * IP, UDP, TCP and SCTP flags always concern the inner layer. The
 808  * OUTER_IP is only useful for tunnel packets.
 809  */
 810 static void
 811 pkt_burst_checksum_forward(struct fwd_stream *fs)
 812 {
 813         struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
 814 #ifdef RTE_LIB_GSO
 815         struct rte_mbuf *gso_segments[GSO_MAX_PKT_BURST];
 816         struct rte_gso_ctx *gso_ctx;
 817 #endif
 818         struct rte_mbuf **tx_pkts_burst;
 819         struct rte_port *txp;
 820         struct rte_mbuf *m, *p;
 821         struct rte_ether_hdr *eth_hdr;
 822         void *l3_hdr = NULL, *outer_l3_hdr = NULL; /* can be IPv4 or IPv6 */
 823 #ifdef RTE_LIB_GRO
 824         void **gro_ctx;
 825         uint16_t gro_pkts_num;
 826         uint8_t gro_enable;
 827 #endif
 828         uint16_t nb_rx;
 829         uint16_t nb_tx;
 830         uint16_t nb_prep;
 831         uint16_t i;
 832         uint64_t rx_ol_flags, tx_ol_flags;
 833         uint64_t tx_offloads;
 834         uint32_t retry;
 835         uint32_t rx_bad_ip_csum;
 836         uint32_t rx_bad_l4_csum;
 837         uint32_t rx_bad_outer_l4_csum;
 838         uint32_t rx_bad_outer_ip_csum;
 839         struct testpmd_offload_info info;
 840
 841         uint64_t start_tsc = 0;
 842
 843         get_start_cycles(&start_tsc);
 844
 845         /* receive a burst of packet */
 846         nb_rx = rte_eth_rx_burst(fs->rx_port, fs->rx_queue, pkts_burst,
 847                                  nb_pkt_per_burst);
 848         inc_rx_burst_stats(fs, nb_rx);
 849         if (unlikely(nb_rx == 0))
 850                 return;
 851
 852         fs->rx_packets += nb_rx;
 853         rx_bad_ip_csum = 0;
 854         rx_bad_l4_csum = 0;
 855         rx_bad_outer_l4_csum = 0;
 856         rx_bad_outer_ip_csum = 0;
 857 #ifdef RTE_LIB_GRO
 858         gro_enable = gro_ports[fs->rx_port].enable;
 859 #endif
 860
 861         txp = &ports[fs->tx_port];
 862         tx_offloads = txp->dev_conf.txmode.offloads;
 863         memset(&info, 0, sizeof(info));
 864         info.tso_segsz = txp->tso_segsz;
 865         info.tunnel_tso_segsz = txp->tunnel_tso_segsz;
 866 #ifdef RTE_LIB_GSO
 867         if (gso_ports[fs->tx_port].enable)
 868                 info.gso_enable = 1;
 869 #endif
 870
 871         for (i = 0; i < nb_rx; i++) {
 872                 if (likely(i < nb_rx - 1))
 873                         rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[i + 1],
 874                                                        void *));
 875
 876                 m = pkts_burst[i];
 877                 info.is_tunnel = 0;
 878                 info.pkt_len = rte_pktmbuf_pkt_len(m);
 879                 tx_ol_flags = m->ol_flags &
 880                               (RTE_MBUF_F_INDIRECT | RTE_MBUF_F_EXTERNAL);
 881                 rx_ol_flags = m->ol_flags;
 882
 883                 /* Update the L3/L4 checksum error packet statistics */
 884                 if ((rx_ol_flags & RTE_MBUF_F_RX_IP_CKSUM_MASK) == RTE_MBUF_F_RX_IP_CKSUM_BAD)
 885                         rx_bad_ip_csum += 1;
 886                 if ((rx_ol_flags & RTE_MBUF_F_RX_L4_CKSUM_MASK) == RTE_MBUF_F_RX_L4_CKSUM_BAD)
 887                         rx_bad_l4_csum += 1;
 888                 if (rx_ol_flags & RTE_MBUF_F_RX_OUTER_L4_CKSUM_BAD)
 889                         rx_bad_outer_l4_csum += 1;
 890                 if (rx_ol_flags & RTE_MBUF_F_RX_OUTER_IP_CKSUM_BAD)
 891                         rx_bad_outer_ip_csum += 1;
 892
 893                 /* step 1: dissect packet, parsing optional vlan, ip4/ip6, vxlan
 894                  * and inner headers */
 895
 896                 eth_hdr = rte_pktmbuf_mtod(m, struct rte_ether_hdr *);
 897                 rte_ether_addr_copy(&peer_eth_addrs[fs->peer_addr],
 898                                 &eth_hdr->dst_addr);
 899                 rte_ether_addr_copy(&ports[fs->tx_port].eth_addr,
 900                                 &eth_hdr->src_addr);
 901                 parse_ethernet(eth_hdr, &info);
 902                 l3_hdr = (char *)eth_hdr + info.l2_len;
 903
 904                 /* check if it's a supported tunnel */
 905                 if (txp->parse_tunnel) {
 906                         if (info.l4_proto == IPPROTO_UDP) {
 907                                 struct rte_udp_hdr *udp_hdr;
 908
 909                                 udp_hdr = (struct rte_udp_hdr *)
 910                                         ((char *)l3_hdr + info.l3_len);
 911                                 parse_gtp(udp_hdr, &info);
 912                                 if (info.is_tunnel) {
 913                                         tx_ol_flags |= RTE_MBUF_F_TX_TUNNEL_GTP;
 914                                         goto tunnel_update;
 915                                 }
 916                                 parse_vxlan_gpe(udp_hdr, &info);
 917                                 if (info.is_tunnel) {
 918                                         tx_ol_flags |=
 919                                                 RTE_MBUF_F_TX_TUNNEL_VXLAN_GPE;
 920                                         goto tunnel_update;
 921                                 }
 922                                 parse_vxlan(udp_hdr, &info);
 923                                 if (info.is_tunnel) {
 924                                         tx_ol_flags |=
 925                                                 RTE_MBUF_F_TX_TUNNEL_VXLAN;
 926                                         goto tunnel_update;
 927                                 }
 928                                 parse_geneve(udp_hdr, &info);
 929                                 if (info.is_tunnel) {
 930                                         tx_ol_flags |=
 931                                                 RTE_MBUF_F_TX_TUNNEL_GENEVE;
 932                                         goto tunnel_update;
 933                                 }
 934                                 /* Always keep last. */
 935                                 if (unlikely(RTE_ETH_IS_TUNNEL_PKT(
 936                                                         m->packet_type) != 0)) {
 937                                         TESTPMD_LOG(DEBUG, "Unknown tunnel packet. UDP dst port: %hu",
 938                                                 udp_hdr->dst_port);
 939                                 }
 940                         } else if (info.l4_proto == IPPROTO_GRE) {
 941                                 struct simple_gre_hdr *gre_hdr;
 942
 943                                 gre_hdr = (struct simple_gre_hdr *)
 944                                         ((char *)l3_hdr + info.l3_len);
 945                                 parse_gre(gre_hdr, &info);
 946                                 if (info.is_tunnel)
 947                                         tx_ol_flags |= RTE_MBUF_F_TX_TUNNEL_GRE;
 948                         } else if (info.l4_proto == IPPROTO_IPIP) {
 949                                 void *encap_ip_hdr;
 950
 951                                 encap_ip_hdr = (char *)l3_hdr + info.l3_len;
 952                                 parse_encap_ip(encap_ip_hdr, &info);
 953                                 if (info.is_tunnel)
 954                                         tx_ol_flags |= RTE_MBUF_F_TX_TUNNEL_IPIP;
 955                         }
 956                 }
 957
 958 tunnel_update:
 959                 /* update l3_hdr and outer_l3_hdr if a tunnel was parsed */
 960                 if (info.is_tunnel) {
 961                         outer_l3_hdr = l3_hdr;
 962                         l3_hdr = (char *)l3_hdr + info.outer_l3_len + info.l2_len;
 963                 }
 964
 965                 /* step 2: depending on user command line configuration,
 966                  * recompute checksum either in software or flag the
 967                  * mbuf to offload the calculation to the NIC. If TSO
 968                  * is configured, prepare the mbuf for TCP segmentation. */
 969
 970                 /* process checksums of inner headers first */
 971                 tx_ol_flags |= process_inner_cksums(l3_hdr, &info,
 972                         tx_offloads, m);
 973
 974                 /* Then process outer headers if any. Note that the software
 975                  * checksum will be wrong if one of the inner checksums is
 976                  * processed in hardware. */
 977                 if (info.is_tunnel == 1) {
 978                         tx_ol_flags |= process_outer_cksums(outer_l3_hdr, &info,
 979                                         tx_offloads,
 980                                         !!(tx_ol_flags & RTE_MBUF_F_TX_TCP_SEG),
 981                                         m);
 982                 }
 983
 984                 /* step 3: fill the mbuf meta data (flags and header lengths) */
 985
 986                 m->tx_offload = 0;
 987                 if (info.is_tunnel == 1) {
 988                         if (info.tunnel_tso_segsz ||
 989                             (tx_offloads &
 990                              RTE_ETH_TX_OFFLOAD_OUTER_IPV4_CKSUM) ||
 991                             (tx_offloads &
 992                              RTE_ETH_TX_OFFLOAD_OUTER_UDP_CKSUM)) {
 993                                 m->outer_l2_len = info.outer_l2_len;
 994                                 m->outer_l3_len = info.outer_l3_len;
 995                                 m->l2_len = info.l2_len;
 996                                 m->l3_len = info.l3_len;
 997                                 m->l4_len = info.l4_len;
 998                                 m->tso_segsz = info.tunnel_tso_segsz;
 999                         }
1000                         else {
1001                                 /* if there is a outer UDP cksum
1002                                    processed in sw and the inner in hw,
1003                                    the outer checksum will be wrong as
1004                                    the payload will be modified by the
1005                                    hardware */
1006                                 m->l2_len = info.outer_l2_len +
1007                                         info.outer_l3_len + info.l2_len;
1008                                 m->l3_len = info.l3_len;
1009                                 m->l4_len = info.l4_len;
1010                         }
1011                 } else {
1012                         /* this is only useful if an offload flag is
1013                          * set, but it does not hurt to fill it in any
1014                          * case */
1015                         m->l2_len = info.l2_len;
1016                         m->l3_len = info.l3_len;
1017                         m->l4_len = info.l4_len;
1018                         m->tso_segsz = info.tso_segsz;
1019                 }
1020                 m->ol_flags = tx_ol_flags;
1021
1022                 /* Do split & copy for the packet. */
1023                 if (tx_pkt_split != TX_PKT_SPLIT_OFF) {
1024                         p = pkt_copy_split(m);
1025                         if (p != NULL) {
1026                                 rte_pktmbuf_free(m);
1027                                 m = p;
1028                                 pkts_burst[i] = m;
1029                         }
1030                 }
1031
1032                 /* if verbose mode is enabled, dump debug info */
1033                 if (verbose_level > 0) {
1034                         char buf[256];
1035
1036                         printf("-----------------\n");
1037                         printf("port=%u, mbuf=%p, pkt_len=%u, nb_segs=%u:\n",
1038                                 fs->rx_port, m, m->pkt_len, m->nb_segs);
1039                         /* dump rx parsed packet info */
1040                         rte_get_rx_ol_flag_list(rx_ol_flags, buf, sizeof(buf));
1041                         printf("rx: l2_len=%d ethertype=%x l3_len=%d "
1042                                 "l4_proto=%d l4_len=%d flags=%s\n",
1043                                 info.l2_len, rte_be_to_cpu_16(info.ethertype),
1044                                 info.l3_len, info.l4_proto, info.l4_len, buf);
1045                         if (rx_ol_flags & RTE_MBUF_F_RX_LRO)
1046                                 printf("rx: m->lro_segsz=%u\n", m->tso_segsz);
1047                         if (info.is_tunnel == 1)
1048                                 printf("rx: outer_l2_len=%d outer_ethertype=%x "
1049                                         "outer_l3_len=%d\n", info.outer_l2_len,
1050                                         rte_be_to_cpu_16(info.outer_ethertype),
1051                                         info.outer_l3_len);
1052                         /* dump tx packet info */
1053                         if ((tx_offloads & (RTE_ETH_TX_OFFLOAD_IPV4_CKSUM |
1054                                             RTE_ETH_TX_OFFLOAD_UDP_CKSUM |
1055                                             RTE_ETH_TX_OFFLOAD_TCP_CKSUM |
1056                                             RTE_ETH_TX_OFFLOAD_SCTP_CKSUM)) ||
1057                                 info.tso_segsz != 0)
1058                                 printf("tx: m->l2_len=%d m->l3_len=%d "
1059                                         "m->l4_len=%d\n",
1060                                         m->l2_len, m->l3_len, m->l4_len);
1061                         if (info.is_tunnel == 1) {
1062                                 if ((tx_offloads &
1063                                     RTE_ETH_TX_OFFLOAD_OUTER_IPV4_CKSUM) ||
1064                                     (tx_offloads &
1065                                     RTE_ETH_TX_OFFLOAD_OUTER_UDP_CKSUM) ||
1066                                     (tx_ol_flags & RTE_MBUF_F_TX_OUTER_IPV6))
1067                                         printf("tx: m->outer_l2_len=%d "
1068                                                 "m->outer_l3_len=%d\n",
1069                                                 m->outer_l2_len,
1070                                                 m->outer_l3_len);
1071                                 if (info.tunnel_tso_segsz != 0 &&
1072                                                 (m->ol_flags & RTE_MBUF_F_TX_TCP_SEG))
1073                                         printf("tx: m->tso_segsz=%d\n",
1074                                                 m->tso_segsz);
1075                         } else if (info.tso_segsz != 0 &&
1076                                         (m->ol_flags & RTE_MBUF_F_TX_TCP_SEG))
1077                                 printf("tx: m->tso_segsz=%d\n", m->tso_segsz);
1078                         rte_get_tx_ol_flag_list(m->ol_flags, buf, sizeof(buf));
1079                         printf("tx: flags=%s", buf);
1080                         printf("\n");
1081                 }
1082         }
1083
1084 #ifdef RTE_LIB_GRO
1085         if (unlikely(gro_enable)) {
1086                 if (gro_flush_cycles == GRO_DEFAULT_FLUSH_CYCLES) {
1087                         nb_rx = rte_gro_reassemble_burst(pkts_burst, nb_rx,
1088                                         &(gro_ports[fs->rx_port].param));
1089                 } else {
1090                         gro_ctx = current_fwd_lcore()->gro_ctx;
1091                         nb_rx = rte_gro_reassemble(pkts_burst, nb_rx, gro_ctx);
1092
1093                         if (++fs->gro_times >= gro_flush_cycles) {
1094                                 gro_pkts_num = rte_gro_get_pkt_count(gro_ctx);
1095                                 if (gro_pkts_num > MAX_PKT_BURST - nb_rx)
1096                                         gro_pkts_num = MAX_PKT_BURST - nb_rx;
1097
1098                                 nb_rx += rte_gro_timeout_flush(gro_ctx, 0,
1099                                                 RTE_GRO_TCP_IPV4,
1100                                                 &pkts_burst[nb_rx],
1101                                                 gro_pkts_num);
1102                                 fs->gro_times = 0;
1103                         }
1104                 }
1105         }
1106 #endif
1107
1108 #ifdef RTE_LIB_GSO
1109         if (gso_ports[fs->tx_port].enable != 0) {
1110                 uint16_t nb_segments = 0;
1111
1112                 gso_ctx = &(current_fwd_lcore()->gso_ctx);
1113                 gso_ctx->gso_size = gso_max_segment_size;
1114                 for (i = 0; i < nb_rx; i++) {
1115                         int ret;
1116
1117                         ret = rte_gso_segment(pkts_burst[i], gso_ctx,
1118                                         &gso_segments[nb_segments],
1119                                         GSO_MAX_PKT_BURST - nb_segments);
1120                         if (ret >= 1) {
1121                                 /* pkts_burst[i] can be freed safely here. */
1122                                 rte_pktmbuf_free(pkts_burst[i]);
1123                                 nb_segments += ret;
1124                         } else if (ret == 0) {
1125                                 /* 0 means it can be transmitted directly
1126                                  * without gso.
1127                                  */
1128                                 gso_segments[nb_segments] = pkts_burst[i];
1129                                 nb_segments += 1;
1130                         } else {
1131                                 TESTPMD_LOG(DEBUG, "Unable to segment packet");
1132                                 rte_pktmbuf_free(pkts_burst[i]);
1133                         }
1134                 }
1135
1136                 tx_pkts_burst = gso_segments;
1137                 nb_rx = nb_segments;
1138         } else
1139 #endif
1140                 tx_pkts_burst = pkts_burst;
1141
1142         nb_prep = rte_eth_tx_prepare(fs->tx_port, fs->tx_queue,
1143                         tx_pkts_burst, nb_rx);
1144         if (nb_prep != nb_rx)
1145                 fprintf(stderr,
1146                         "Preparing packet burst to transmit failed: %s\n",
1147                         rte_strerror(rte_errno));
1148
1149         nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, tx_pkts_burst,
1150                         nb_prep);
1151
1152         /*
1153          * Retry if necessary
1154          */
1155         if (unlikely(nb_tx < nb_rx) && fs->retry_enabled) {
1156                 retry = 0;
1157                 while (nb_tx < nb_rx && retry++ < burst_tx_retry_num) {
1158                         rte_delay_us(burst_tx_delay_time);
1159                         nb_tx += rte_eth_tx_burst(fs->tx_port, fs->tx_queue,
1160                                         &tx_pkts_burst[nb_tx], nb_rx - nb_tx);
1161                 }
1162         }
1163         fs->tx_packets += nb_tx;
1164         fs->rx_bad_ip_csum += rx_bad_ip_csum;
1165         fs->rx_bad_l4_csum += rx_bad_l4_csum;
1166         fs->rx_bad_outer_l4_csum += rx_bad_outer_l4_csum;
1167         fs->rx_bad_outer_ip_csum += rx_bad_outer_ip_csum;
1168
1169         inc_tx_burst_stats(fs, nb_tx);
1170         if (unlikely(nb_tx < nb_rx)) {
1171                 fs->fwd_dropped += (nb_rx - nb_tx);
1172                 do {
1173                         rte_pktmbuf_free(tx_pkts_burst[nb_tx]);
1174                 } while (++nb_tx < nb_rx);
1175         }
1176
1177         get_end_cycles(fs, start_tsc);
1178 }
1179
1180 struct fwd_engine csum_fwd_engine = {
1181         .fwd_mode_name  = "csum",
1182         .port_fwd_begin = NULL,
1183         .port_fwd_end   = NULL,
1184         .packet_fwd     = pkt_burst_checksum_forward,
1185 };