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_atomic.h>
  28 #include <rte_branch_prediction.h>
  29 #include <rte_mempool.h>
  30 #include <rte_mbuf.h>
  31 #include <rte_interrupts.h>
  32 #include <rte_pci.h>
  33 #include <rte_ether.h>
  34 #include <rte_ethdev.h>
  35 #include <rte_ip.h>
  36 #include <rte_tcp.h>
  37 #include <rte_udp.h>
  38 #include <rte_vxlan.h>
  39 #include <rte_sctp.h>
  40 #include <rte_gtp.h>
  41 #include <rte_prefetch.h>
  42 #include <rte_string_fns.h>
  43 #include <rte_flow.h>
  44 #include <rte_gro.h>
  45 #include <rte_gso.h>
  46 #include <rte_geneve.h>
  47
  48 #include "testpmd.h"
  49
  50 #define IP_DEFTTL  64   /* from RFC 1340. */
  51
  52 #define GRE_CHECKSUM_PRESENT    0x8000
  53 #define GRE_KEY_PRESENT         0x2000
  54 #define GRE_SEQUENCE_PRESENT    0x1000
  55 #define GRE_EXT_LEN             4
  56 #define GRE_SUPPORTED_FIELDS    (GRE_CHECKSUM_PRESENT | GRE_KEY_PRESENT |\
  57                                  GRE_SEQUENCE_PRESENT)
  58
  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)))
  62 #else
  63 #define _htons(x) (x)
  64 #endif
  65
  66 uint16_t vxlan_gpe_udp_port = 4790;
  67 uint16_t geneve_udp_port = RTE_GENEVE_DEFAULT_PORT;
  68
  69 /* structure that caches offload info for the current packet */
  70 struct testpmd_offload_info {
  71         uint16_t ethertype;
  72         uint8_t gso_enable;
  73         uint16_t l2_len;
  74         uint16_t l3_len;
  75         uint16_t l4_len;
  76         uint8_t l4_proto;
  77         uint8_t is_tunnel;
  78         uint16_t outer_ethertype;
  79         uint16_t outer_l2_len;
  80         uint16_t outer_l3_len;
  81         uint8_t outer_l4_proto;
  82         uint16_t tso_segsz;
  83         uint16_t tunnel_tso_segsz;
  84         uint32_t pkt_len;
  85 };
  86
  87 /* simplified GRE header */
  88 struct simple_gre_hdr {
  89         uint16_t flags;
  90         uint16_t proto;
  91 } __rte_packed;
  92
  93 static uint16_t
  94 get_udptcp_checksum(void *l3_hdr, void *l4_hdr, uint16_t ethertype)
  95 {
  96         if (ethertype == _htons(RTE_ETHER_TYPE_IPV4))
  97                 return rte_ipv4_udptcp_cksum(l3_hdr, l4_hdr);
  98         else /* assume ethertype == RTE_ETHER_TYPE_IPV6 */
  99                 return rte_ipv6_udptcp_cksum(l3_hdr, l4_hdr);
 100 }
 101
 102 /* Parse an IPv4 header to fill l3_len, l4_len, and l4_proto */
 103 static void
 104 parse_ipv4(struct rte_ipv4_hdr *ipv4_hdr, struct testpmd_offload_info *info)
 105 {
 106         struct rte_tcp_hdr *tcp_hdr;
 107
 108         info->l3_len = (ipv4_hdr->version_ihl & 0x0f) * 4;
 109         info->l4_proto = ipv4_hdr->next_proto_id;
 110
 111         /* only fill l4_len for TCP, it's useful for TSO */
 112         if (info->l4_proto == IPPROTO_TCP) {
 113                 tcp_hdr = (struct rte_tcp_hdr *)
 114                         ((char *)ipv4_hdr + info->l3_len);
 115                 info->l4_len = (tcp_hdr->data_off & 0xf0) >> 2;
 116         } else if (info->l4_proto == IPPROTO_UDP)
 117                 info->l4_len = sizeof(struct rte_udp_hdr);
 118         else
 119                 info->l4_len = 0;
 120 }
 121
 122 /* Parse an IPv6 header to fill l3_len, l4_len, and l4_proto */
 123 static void
 124 parse_ipv6(struct rte_ipv6_hdr *ipv6_hdr, struct testpmd_offload_info *info)
 125 {
 126         struct rte_tcp_hdr *tcp_hdr;
 127
 128         info->l3_len = sizeof(struct rte_ipv6_hdr);
 129         info->l4_proto = ipv6_hdr->proto;
 130
 131         /* only fill l4_len for TCP, it's useful for TSO */
 132         if (info->l4_proto == IPPROTO_TCP) {
 133                 tcp_hdr = (struct rte_tcp_hdr *)
 134                         ((char *)ipv6_hdr + info->l3_len);
 135                 info->l4_len = (tcp_hdr->data_off & 0xf0) >> 2;
 136         } else if (info->l4_proto == IPPROTO_UDP)
 137                 info->l4_len = sizeof(struct rte_udp_hdr);
 138         else
 139                 info->l4_len = 0;
 140 }
 141
 142 /*
 143  * Parse an ethernet header to fill the ethertype, l2_len, l3_len and
 144  * ipproto. This function is able to recognize IPv4/IPv6 with optional VLAN
 145  * headers. The l4_len argument is only set in case of TCP (useful for TSO).
 146  */
 147 static void
 148 parse_ethernet(struct rte_ether_hdr *eth_hdr, struct testpmd_offload_info *info)
 149 {
 150         struct rte_ipv4_hdr *ipv4_hdr;
 151         struct rte_ipv6_hdr *ipv6_hdr;
 152         struct rte_vlan_hdr *vlan_hdr;
 153
 154         info->l2_len = sizeof(struct rte_ether_hdr);
 155         info->ethertype = eth_hdr->ether_type;
 156
 157         while (info->ethertype == _htons(RTE_ETHER_TYPE_VLAN) ||
 158                info->ethertype == _htons(RTE_ETHER_TYPE_QINQ)) {
 159                 vlan_hdr = (struct rte_vlan_hdr *)
 160                         ((char *)eth_hdr + info->l2_len);
 161                 info->l2_len  += sizeof(struct rte_vlan_hdr);
 162                 info->ethertype = vlan_hdr->eth_proto;
 163         }
 164
 165         switch (info->ethertype) {
 166         case _htons(RTE_ETHER_TYPE_IPV4):
 167                 ipv4_hdr = (struct rte_ipv4_hdr *)
 168                         ((char *)eth_hdr + info->l2_len);
 169                 parse_ipv4(ipv4_hdr, info);
 170                 break;
 171         case _htons(RTE_ETHER_TYPE_IPV6):
 172                 ipv6_hdr = (struct rte_ipv6_hdr *)
 173                         ((char *)eth_hdr + info->l2_len);
 174                 parse_ipv6(ipv6_hdr, info);
 175                 break;
 176         default:
 177                 info->l4_len = 0;
 178                 info->l3_len = 0;
 179                 info->l4_proto = 0;
 180                 break;
 181         }
 182 }
 183
 184 /*
 185  * Parse a GTP protocol header.
 186  * No optional fields and next extension header type.
 187  */
 188 static void
 189 parse_gtp(struct rte_udp_hdr *udp_hdr,
 190           struct testpmd_offload_info *info)
 191 {
 192         struct rte_ipv4_hdr *ipv4_hdr;
 193         struct rte_ipv6_hdr *ipv6_hdr;
 194         struct rte_gtp_hdr *gtp_hdr;
 195         uint8_t gtp_len = sizeof(*gtp_hdr);
 196         uint8_t ip_ver;
 197
 198         /* Check udp destination port. */
 199         if (udp_hdr->dst_port != _htons(RTE_GTPC_UDP_PORT) &&
 200             udp_hdr->src_port != _htons(RTE_GTPC_UDP_PORT) &&
 201             udp_hdr->dst_port != _htons(RTE_GTPU_UDP_PORT))
 202                 return;
 203
 204         info->is_tunnel = 1;
 205         info->outer_ethertype = info->ethertype;
 206         info->outer_l2_len = info->l2_len;
 207         info->outer_l3_len = info->l3_len;
 208         info->outer_l4_proto = info->l4_proto;
 209         info->l2_len = 0;
 210
 211         gtp_hdr = (struct rte_gtp_hdr *)((char *)udp_hdr +
 212                   sizeof(struct rte_udp_hdr));
 213
 214         /*
 215          * Check message type. If message type is 0xff, it is
 216          * a GTP data packet. If not, it is a GTP control packet
 217          */
 218         if (gtp_hdr->msg_type == 0xff) {
 219                 ip_ver = *(uint8_t *)((char *)udp_hdr +
 220                          sizeof(struct rte_udp_hdr) +
 221                          sizeof(struct rte_gtp_hdr));
 222                 ip_ver = (ip_ver) & 0xf0;
 223
 224                 if (ip_ver == RTE_GTP_TYPE_IPV4) {
 225                         ipv4_hdr = (struct rte_ipv4_hdr *)((char *)gtp_hdr +
 226                                    gtp_len);
 227                         info->ethertype = _htons(RTE_ETHER_TYPE_IPV4);
 228                         parse_ipv4(ipv4_hdr, info);
 229                 } else if (ip_ver == RTE_GTP_TYPE_IPV6) {
 230                         ipv6_hdr = (struct rte_ipv6_hdr *)((char *)gtp_hdr +
 231                                    gtp_len);
 232                         info->ethertype = _htons(RTE_ETHER_TYPE_IPV6);
 233                         parse_ipv6(ipv6_hdr, info);
 234                 }
 235         } else {
 236                 info->ethertype = 0;
 237                 info->l4_len = 0;
 238                 info->l3_len = 0;
 239                 info->l4_proto = 0;
 240         }
 241
 242         info->l2_len += RTE_ETHER_GTP_HLEN;
 243 }
 244
 245 /* Parse a vxlan header */
 246 static void
 247 parse_vxlan(struct rte_udp_hdr *udp_hdr,
 248             struct testpmd_offload_info *info,
 249             uint32_t pkt_type)
 250 {
 251         struct rte_ether_hdr *eth_hdr;
 252
 253         /* check udp destination port, 4789 is the default vxlan port
 254          * (rfc7348) or that the rx offload flag is set (i40e only
 255          * currently) */
 256         if (udp_hdr->dst_port != _htons(4789) &&
 257                 RTE_ETH_IS_TUNNEL_PKT(pkt_type) == 0)
 258                 return;
 259
 260         info->is_tunnel = 1;
 261         info->outer_ethertype = info->ethertype;
 262         info->outer_l2_len = info->l2_len;
 263         info->outer_l3_len = info->l3_len;
 264         info->outer_l4_proto = info->l4_proto;
 265
 266         eth_hdr = (struct rte_ether_hdr *)((char *)udp_hdr +
 267                 sizeof(struct rte_udp_hdr) +
 268                 sizeof(struct rte_vxlan_hdr));
 269
 270         parse_ethernet(eth_hdr, info);
 271         info->l2_len += RTE_ETHER_VXLAN_HLEN; /* add udp + vxlan */
 272 }
 273
 274 /* Parse a vxlan-gpe header */
 275 static void
 276 parse_vxlan_gpe(struct rte_udp_hdr *udp_hdr,
 277             struct testpmd_offload_info *info)
 278 {
 279         struct rte_ether_hdr *eth_hdr;
 280         struct rte_ipv4_hdr *ipv4_hdr;
 281         struct rte_ipv6_hdr *ipv6_hdr;
 282         struct rte_vxlan_gpe_hdr *vxlan_gpe_hdr;
 283         uint8_t vxlan_gpe_len = sizeof(*vxlan_gpe_hdr);
 284
 285         /* Check udp destination port. */
 286         if (udp_hdr->dst_port != _htons(vxlan_gpe_udp_port))
 287                 return;
 288
 289         vxlan_gpe_hdr = (struct rte_vxlan_gpe_hdr *)((char *)udp_hdr +
 290                                 sizeof(struct rte_udp_hdr));
 291
 292         if (!vxlan_gpe_hdr->proto || vxlan_gpe_hdr->proto ==
 293             RTE_VXLAN_GPE_TYPE_IPV4) {
 294                 info->is_tunnel = 1;
 295                 info->outer_ethertype = info->ethertype;
 296                 info->outer_l2_len = info->l2_len;
 297                 info->outer_l3_len = info->l3_len;
 298                 info->outer_l4_proto = info->l4_proto;
 299
 300                 ipv4_hdr = (struct rte_ipv4_hdr *)((char *)vxlan_gpe_hdr +
 301                            vxlan_gpe_len);
 302
 303                 parse_ipv4(ipv4_hdr, info);
 304                 info->ethertype = _htons(RTE_ETHER_TYPE_IPV4);
 305                 info->l2_len = 0;
 306
 307         } else if (vxlan_gpe_hdr->proto == RTE_VXLAN_GPE_TYPE_IPV6) {
 308                 info->is_tunnel = 1;
 309                 info->outer_ethertype = info->ethertype;
 310                 info->outer_l2_len = info->l2_len;
 311                 info->outer_l3_len = info->l3_len;
 312                 info->outer_l4_proto = info->l4_proto;
 313
 314                 ipv6_hdr = (struct rte_ipv6_hdr *)((char *)vxlan_gpe_hdr +
 315                            vxlan_gpe_len);
 316
 317                 info->ethertype = _htons(RTE_ETHER_TYPE_IPV6);
 318                 parse_ipv6(ipv6_hdr, info);
 319                 info->l2_len = 0;
 320
 321         } else if (vxlan_gpe_hdr->proto == RTE_VXLAN_GPE_TYPE_ETH) {
 322                 info->is_tunnel = 1;
 323                 info->outer_ethertype = info->ethertype;
 324                 info->outer_l2_len = info->l2_len;
 325                 info->outer_l3_len = info->l3_len;
 326                 info->outer_l4_proto = info->l4_proto;
 327
 328                 eth_hdr = (struct rte_ether_hdr *)((char *)vxlan_gpe_hdr +
 329                           vxlan_gpe_len);
 330
 331                 parse_ethernet(eth_hdr, info);
 332         } else
 333                 return;
 334
 335         info->l2_len += RTE_ETHER_VXLAN_GPE_HLEN;
 336 }
 337
 338 /* Fill in outer layers length */
 339 static void
 340 update_tunnel_outer(struct testpmd_offload_info *info)
 341 {
 342         info->is_tunnel = 1;
 343         info->outer_ethertype = info->ethertype;
 344         info->outer_l2_len = info->l2_len;
 345         info->outer_l3_len = info->l3_len;
 346         info->outer_l4_proto = info->l4_proto;
 347 }
 348
 349 /* Parse a geneve header */
 350 static void
 351 parse_geneve(struct rte_udp_hdr *udp_hdr,
 352             struct testpmd_offload_info *info)
 353 {
 354         struct rte_ether_hdr *eth_hdr;
 355         struct rte_ipv4_hdr *ipv4_hdr;
 356         struct rte_ipv6_hdr *ipv6_hdr;
 357         struct rte_geneve_hdr *geneve_hdr;
 358         uint16_t geneve_len;
 359
 360         /* Check udp destination port. */
 361         if (udp_hdr->dst_port != _htons(geneve_udp_port))
 362                 return;
 363
 364         geneve_hdr = (struct rte_geneve_hdr *)((char *)udp_hdr +
 365                                 sizeof(struct rte_udp_hdr));
 366         geneve_len = sizeof(struct rte_geneve_hdr) + geneve_hdr->opt_len * 4;
 367         if (!geneve_hdr->proto || geneve_hdr->proto ==
 368             _htons(RTE_ETHER_TYPE_IPV4)) {
 369                 update_tunnel_outer(info);
 370                 ipv4_hdr = (struct rte_ipv4_hdr *)((char *)geneve_hdr +
 371                            geneve_len);
 372                 parse_ipv4(ipv4_hdr, info);
 373                 info->ethertype = _htons(RTE_ETHER_TYPE_IPV4);
 374                 info->l2_len = 0;
 375         } else if (geneve_hdr->proto == _htons(RTE_ETHER_TYPE_IPV6)) {
 376                 update_tunnel_outer(info);
 377                 ipv6_hdr = (struct rte_ipv6_hdr *)((char *)geneve_hdr +
 378                            geneve_len);
 379                 info->ethertype = _htons(RTE_ETHER_TYPE_IPV6);
 380                 parse_ipv6(ipv6_hdr, info);
 381                 info->l2_len = 0;
 382
 383         } else if (geneve_hdr->proto == _htons(RTE_GENEVE_TYPE_ETH)) {
 384                 update_tunnel_outer(info);
 385                 eth_hdr = (struct rte_ether_hdr *)((char *)geneve_hdr +
 386                           geneve_len);
 387                 parse_ethernet(eth_hdr, info);
 388         } else
 389                 return;
 390
 391         info->l2_len +=
 392                 (sizeof(struct rte_udp_hdr) + sizeof(struct rte_geneve_hdr) +
 393                 ((struct rte_geneve_hdr *)geneve_hdr)->opt_len * 4);
 394 }
 395
 396 /* Parse a gre header */
 397 static void
 398 parse_gre(struct simple_gre_hdr *gre_hdr, struct testpmd_offload_info *info)
 399 {
 400         struct rte_ether_hdr *eth_hdr;
 401         struct rte_ipv4_hdr *ipv4_hdr;
 402         struct rte_ipv6_hdr *ipv6_hdr;
 403         uint8_t gre_len = 0;
 404
 405         gre_len += sizeof(struct simple_gre_hdr);
 406
 407         if (gre_hdr->flags & _htons(GRE_KEY_PRESENT))
 408                 gre_len += GRE_EXT_LEN;
 409         if (gre_hdr->flags & _htons(GRE_SEQUENCE_PRESENT))
 410                 gre_len += GRE_EXT_LEN;
 411         if (gre_hdr->flags & _htons(GRE_CHECKSUM_PRESENT))
 412                 gre_len += GRE_EXT_LEN;
 413
 414         if (gre_hdr->proto == _htons(RTE_ETHER_TYPE_IPV4)) {
 415                 info->is_tunnel = 1;
 416                 info->outer_ethertype = info->ethertype;
 417                 info->outer_l2_len = info->l2_len;
 418                 info->outer_l3_len = info->l3_len;
 419                 info->outer_l4_proto = info->l4_proto;
 420
 421                 ipv4_hdr = (struct rte_ipv4_hdr *)((char *)gre_hdr + gre_len);
 422
 423                 parse_ipv4(ipv4_hdr, info);
 424                 info->ethertype = _htons(RTE_ETHER_TYPE_IPV4);
 425                 info->l2_len = 0;
 426
 427         } else if (gre_hdr->proto == _htons(RTE_ETHER_TYPE_IPV6)) {
 428                 info->is_tunnel = 1;
 429                 info->outer_ethertype = info->ethertype;
 430                 info->outer_l2_len = info->l2_len;
 431                 info->outer_l3_len = info->l3_len;
 432                 info->outer_l4_proto = info->l4_proto;
 433
 434                 ipv6_hdr = (struct rte_ipv6_hdr *)((char *)gre_hdr + gre_len);
 435
 436                 info->ethertype = _htons(RTE_ETHER_TYPE_IPV6);
 437                 parse_ipv6(ipv6_hdr, info);
 438                 info->l2_len = 0;
 439
 440         } else if (gre_hdr->proto == _htons(RTE_ETHER_TYPE_TEB)) {
 441                 info->is_tunnel = 1;
 442                 info->outer_ethertype = info->ethertype;
 443                 info->outer_l2_len = info->l2_len;
 444                 info->outer_l3_len = info->l3_len;
 445                 info->outer_l4_proto = info->l4_proto;
 446
 447                 eth_hdr = (struct rte_ether_hdr *)((char *)gre_hdr + gre_len);
 448
 449                 parse_ethernet(eth_hdr, info);
 450         } else
 451                 return;
 452
 453         info->l2_len += gre_len;
 454 }
 455
 456
 457 /* Parse an encapsulated ip or ipv6 header */
 458 static void
 459 parse_encap_ip(void *encap_ip, struct testpmd_offload_info *info)
 460 {
 461         struct rte_ipv4_hdr *ipv4_hdr = encap_ip;
 462         struct rte_ipv6_hdr *ipv6_hdr = encap_ip;
 463         uint8_t ip_version;
 464
 465         ip_version = (ipv4_hdr->version_ihl & 0xf0) >> 4;
 466
 467         if (ip_version != 4 && ip_version != 6)
 468                 return;
 469
 470         info->is_tunnel = 1;
 471         info->outer_ethertype = info->ethertype;
 472         info->outer_l2_len = info->l2_len;
 473         info->outer_l3_len = info->l3_len;
 474
 475         if (ip_version == 4) {
 476                 parse_ipv4(ipv4_hdr, info);
 477                 info->ethertype = _htons(RTE_ETHER_TYPE_IPV4);
 478         } else {
 479                 parse_ipv6(ipv6_hdr, info);
 480                 info->ethertype = _htons(RTE_ETHER_TYPE_IPV6);
 481         }
 482         info->l2_len = 0;
 483 }
 484
 485 /* if possible, calculate the checksum of a packet in hw or sw,
 486  * depending on the testpmd command line configuration */
 487 static uint64_t
 488 process_inner_cksums(void *l3_hdr, const struct testpmd_offload_info *info,
 489         uint64_t tx_offloads)
 490 {
 491         struct rte_ipv4_hdr *ipv4_hdr = l3_hdr;
 492         struct rte_udp_hdr *udp_hdr;
 493         struct rte_tcp_hdr *tcp_hdr;
 494         struct rte_sctp_hdr *sctp_hdr;
 495         uint64_t ol_flags = 0;
 496         uint32_t max_pkt_len, tso_segsz = 0;
 497
 498         /* ensure packet is large enough to require tso */
 499         if (!info->is_tunnel) {
 500                 max_pkt_len = info->l2_len + info->l3_len + info->l4_len +
 501                         info->tso_segsz;
 502                 if (info->tso_segsz != 0 && info->pkt_len > max_pkt_len)
 503                         tso_segsz = info->tso_segsz;
 504         } else {
 505                 max_pkt_len = info->outer_l2_len + info->outer_l3_len +
 506                         info->l2_len + info->l3_len + info->l4_len +
 507                         info->tunnel_tso_segsz;
 508                 if (info->tunnel_tso_segsz != 0 && info->pkt_len > max_pkt_len)
 509                         tso_segsz = info->tunnel_tso_segsz;
 510         }
 511
 512         if (info->ethertype == _htons(RTE_ETHER_TYPE_IPV4)) {
 513                 ipv4_hdr = l3_hdr;
 514                 ipv4_hdr->hdr_checksum = 0;
 515
 516                 ol_flags |= PKT_TX_IPV4;
 517                 if (info->l4_proto == IPPROTO_TCP && tso_segsz) {
 518                         ol_flags |= PKT_TX_IP_CKSUM;
 519                 } else {
 520                         if (tx_offloads & DEV_TX_OFFLOAD_IPV4_CKSUM)
 521                                 ol_flags |= PKT_TX_IP_CKSUM;
 522                         else
 523                                 ipv4_hdr->hdr_checksum =
 524                                         rte_ipv4_cksum(ipv4_hdr);
 525                 }
 526         } else if (info->ethertype == _htons(RTE_ETHER_TYPE_IPV6))
 527                 ol_flags |= PKT_TX_IPV6;
 528         else
 529                 return 0; /* packet type not supported, nothing to do */
 530
 531         if (info->l4_proto == IPPROTO_UDP) {
 532                 udp_hdr = (struct rte_udp_hdr *)((char *)l3_hdr + info->l3_len);
 533                 /* do not recalculate udp cksum if it was 0 */
 534                 if (udp_hdr->dgram_cksum != 0) {
 535                         udp_hdr->dgram_cksum = 0;
 536                         if (tx_offloads & DEV_TX_OFFLOAD_UDP_CKSUM)
 537                                 ol_flags |= PKT_TX_UDP_CKSUM;
 538                         else {
 539                                 udp_hdr->dgram_cksum =
 540                                         get_udptcp_checksum(l3_hdr, udp_hdr,
 541                                                 info->ethertype);
 542                         }
 543                 }
 544                 if (info->gso_enable)
 545                         ol_flags |= PKT_TX_UDP_SEG;
 546         } else if (info->l4_proto == IPPROTO_TCP) {
 547                 tcp_hdr = (struct rte_tcp_hdr *)((char *)l3_hdr + info->l3_len);
 548                 tcp_hdr->cksum = 0;
 549                 if (tso_segsz)
 550                         ol_flags |= PKT_TX_TCP_SEG;
 551                 else if (tx_offloads & DEV_TX_OFFLOAD_TCP_CKSUM)
 552                         ol_flags |= PKT_TX_TCP_CKSUM;
 553                 else {
 554                         tcp_hdr->cksum =
 555                                 get_udptcp_checksum(l3_hdr, tcp_hdr,
 556                                         info->ethertype);
 557                 }
 558                 if (info->gso_enable)
 559                         ol_flags |= PKT_TX_TCP_SEG;
 560         } else if (info->l4_proto == IPPROTO_SCTP) {
 561                 sctp_hdr = (struct rte_sctp_hdr *)
 562                         ((char *)l3_hdr + info->l3_len);
 563                 sctp_hdr->cksum = 0;
 564                 /* sctp payload must be a multiple of 4 to be
 565                  * offloaded */
 566                 if ((tx_offloads & DEV_TX_OFFLOAD_SCTP_CKSUM) &&
 567                         ((ipv4_hdr->total_length & 0x3) == 0)) {
 568                         ol_flags |= PKT_TX_SCTP_CKSUM;
 569                 } else {
 570                         /* XXX implement CRC32c, example available in
 571                          * RFC3309 */
 572                 }
 573         }
 574
 575         return ol_flags;
 576 }
 577
 578 /* Calculate the checksum of outer header */
 579 static uint64_t
 580 process_outer_cksums(void *outer_l3_hdr, struct testpmd_offload_info *info,
 581         uint64_t tx_offloads, int tso_enabled)
 582 {
 583         struct rte_ipv4_hdr *ipv4_hdr = outer_l3_hdr;
 584         struct rte_ipv6_hdr *ipv6_hdr = outer_l3_hdr;
 585         struct rte_udp_hdr *udp_hdr;
 586         uint64_t ol_flags = 0;
 587
 588         if (info->outer_ethertype == _htons(RTE_ETHER_TYPE_IPV4)) {
 589                 ipv4_hdr->hdr_checksum = 0;
 590                 ol_flags |= PKT_TX_OUTER_IPV4;
 591
 592                 if (tx_offloads & DEV_TX_OFFLOAD_OUTER_IPV4_CKSUM)
 593                         ol_flags |= PKT_TX_OUTER_IP_CKSUM;
 594                 else
 595                         ipv4_hdr->hdr_checksum = rte_ipv4_cksum(ipv4_hdr);
 596         } else
 597                 ol_flags |= PKT_TX_OUTER_IPV6;
 598
 599         if (info->outer_l4_proto != IPPROTO_UDP)
 600                 return ol_flags;
 601
 602         udp_hdr = (struct rte_udp_hdr *)
 603                 ((char *)outer_l3_hdr + info->outer_l3_len);
 604
 605         if (tso_enabled)
 606                 ol_flags |= PKT_TX_TCP_SEG;
 607
 608         /* Skip SW outer UDP checksum generation if HW supports it */
 609         if (tx_offloads & DEV_TX_OFFLOAD_OUTER_UDP_CKSUM) {
 610                 if (info->outer_ethertype == _htons(RTE_ETHER_TYPE_IPV4))
 611                         udp_hdr->dgram_cksum
 612                                 = rte_ipv4_phdr_cksum(ipv4_hdr, ol_flags);
 613                 else
 614                         udp_hdr->dgram_cksum
 615                                 = rte_ipv6_phdr_cksum(ipv6_hdr, ol_flags);
 616
 617                 ol_flags |= PKT_TX_OUTER_UDP_CKSUM;
 618                 return ol_flags;
 619         }
 620
 621         /* outer UDP checksum is done in software. In the other side, for
 622          * UDP tunneling, like VXLAN or Geneve, outer UDP checksum can be
 623          * set to zero.
 624          *
 625          * If a packet will be TSOed into small packets by NIC, we cannot
 626          * set/calculate a non-zero checksum, because it will be a wrong
 627          * value after the packet be split into several small packets.
 628          */
 629         if (tso_enabled)
 630                 udp_hdr->dgram_cksum = 0;
 631
 632         /* do not recalculate udp cksum if it was 0 */
 633         if (udp_hdr->dgram_cksum != 0) {
 634                 udp_hdr->dgram_cksum = 0;
 635                 if (info->outer_ethertype == _htons(RTE_ETHER_TYPE_IPV4))
 636                         udp_hdr->dgram_cksum =
 637                                 rte_ipv4_udptcp_cksum(ipv4_hdr, udp_hdr);
 638                 else
 639                         udp_hdr->dgram_cksum =
 640                                 rte_ipv6_udptcp_cksum(ipv6_hdr, udp_hdr);
 641         }
 642
 643         return ol_flags;
 644 }
 645
 646 /*
 647  * Helper function.
 648  * Performs actual copying.
 649  * Returns number of segments in the destination mbuf on success,
 650  * or negative error code on failure.
 651  */
 652 static int
 653 mbuf_copy_split(const struct rte_mbuf *ms, struct rte_mbuf *md[],
 654         uint16_t seglen[], uint8_t nb_seg)
 655 {
 656         uint32_t dlen, slen, tlen;
 657         uint32_t i, len;
 658         const struct rte_mbuf *m;
 659         const uint8_t *src;
 660         uint8_t *dst;
 661
 662         dlen = 0;
 663         slen = 0;
 664         tlen = 0;
 665
 666         dst = NULL;
 667         src = NULL;
 668
 669         m = ms;
 670         i = 0;
 671         while (ms != NULL && i != nb_seg) {
 672
 673                 if (slen == 0) {
 674                         slen = rte_pktmbuf_data_len(ms);
 675                         src = rte_pktmbuf_mtod(ms, const uint8_t *);
 676                 }
 677
 678                 if (dlen == 0) {
 679                         dlen = RTE_MIN(seglen[i], slen);
 680                         md[i]->data_len = dlen;
 681                         md[i]->next = (i + 1 == nb_seg) ? NULL : md[i + 1];
 682                         dst = rte_pktmbuf_mtod(md[i], uint8_t *);
 683                 }
 684
 685                 len = RTE_MIN(slen, dlen);
 686                 memcpy(dst, src, len);
 687                 tlen += len;
 688                 slen -= len;
 689                 dlen -= len;
 690                 src += len;
 691                 dst += len;
 692
 693                 if (slen == 0)
 694                         ms = ms->next;
 695                 if (dlen == 0)
 696                         i++;
 697         }
 698
 699         if (ms != NULL)
 700                 return -ENOBUFS;
 701         else if (tlen != m->pkt_len)
 702                 return -EINVAL;
 703
 704         md[0]->nb_segs = nb_seg;
 705         md[0]->pkt_len = tlen;
 706         md[0]->vlan_tci = m->vlan_tci;
 707         md[0]->vlan_tci_outer = m->vlan_tci_outer;
 708         md[0]->ol_flags = m->ol_flags;
 709         md[0]->tx_offload = m->tx_offload;
 710
 711         return nb_seg;
 712 }
 713
 714 /*
 715  * Allocate a new mbuf with up to tx_pkt_nb_segs segments.
 716  * Copy packet contents and offload information into the new segmented mbuf.
 717  */
 718 static struct rte_mbuf *
 719 pkt_copy_split(const struct rte_mbuf *pkt)
 720 {
 721         int32_t n, rc;
 722         uint32_t i, len, nb_seg;
 723         struct rte_mempool *mp;
 724         uint16_t seglen[RTE_MAX_SEGS_PER_PKT];
 725         struct rte_mbuf *p, *md[RTE_MAX_SEGS_PER_PKT];
 726
 727         mp = current_fwd_lcore()->mbp;
 728
 729         if (tx_pkt_split == TX_PKT_SPLIT_RND)
 730                 nb_seg = random() % tx_pkt_nb_segs + 1;
 731         else
 732                 nb_seg = tx_pkt_nb_segs;
 733
 734         memcpy(seglen, tx_pkt_seg_lengths, nb_seg * sizeof(seglen[0]));
 735
 736         /* calculate number of segments to use and their length. */
 737         len = 0;
 738         for (i = 0; i != nb_seg && len < pkt->pkt_len; i++) {
 739                 len += seglen[i];
 740                 md[i] = NULL;
 741         }
 742
 743         n = pkt->pkt_len - len;
 744
 745         /* update size of the last segment to fit rest of the packet */
 746         if (n >= 0) {
 747                 seglen[i - 1] += n;
 748                 len += n;
 749         }
 750
 751         nb_seg = i;
 752         while (i != 0) {
 753                 p = rte_pktmbuf_alloc(mp);
 754                 if (p == NULL) {
 755                         TESTPMD_LOG(ERR,
 756                                 "failed to allocate %u-th of %u mbuf "
 757                                 "from mempool: %s\n",
 758                                 nb_seg - i, nb_seg, mp->name);
 759                         break;
 760                 }
 761
 762                 md[--i] = p;
 763                 if (rte_pktmbuf_tailroom(md[i]) < seglen[i]) {
 764                         TESTPMD_LOG(ERR, "mempool %s, %u-th segment: "
 765                                 "expected seglen: %u, "
 766                                 "actual mbuf tailroom: %u\n",
 767                                 mp->name, i, seglen[i],
 768                                 rte_pktmbuf_tailroom(md[i]));
 769                         break;
 770                 }
 771         }
 772
 773         /* all mbufs successfully allocated, do copy */
 774         if (i == 0) {
 775                 rc = mbuf_copy_split(pkt, md, seglen, nb_seg);
 776                 if (rc < 0)
 777                         TESTPMD_LOG(ERR,
 778                                 "mbuf_copy_split for %p(len=%u, nb_seg=%u) "
 779                                 "into %u segments failed with error code: %d\n",
 780                                 pkt, pkt->pkt_len, pkt->nb_segs, nb_seg, rc);
 781
 782                 /* figure out how many mbufs to free. */
 783                 i = RTE_MAX(rc, 0);
 784         }
 785
 786         /* free unused mbufs */
 787         for (; i != nb_seg; i++) {
 788                 rte_pktmbuf_free_seg(md[i]);
 789                 md[i] = NULL;
 790         }
 791
 792         return md[0];
 793 }
 794
 795 /*
 796  * Receive a burst of packets, and for each packet:
 797  *  - parse packet, and try to recognize a supported packet type (1)
 798  *  - if it's not a supported packet type, don't touch the packet, else:
 799  *  - reprocess the checksum of all supported layers. This is done in SW
 800  *    or HW, depending on testpmd command line configuration
 801  *  - if TSO is enabled in testpmd command line, also flag the mbuf for TCP
 802  *    segmentation offload (this implies HW TCP checksum)
 803  * Then transmit packets on the output port.
 804  *
 805  * (1) Supported packets are:
 806  *   Ether / (vlan) / IP|IP6 / UDP|TCP|SCTP .
 807  *   Ether / (vlan) / outer IP|IP6 / outer UDP / VxLAN / Ether / IP|IP6 /
 808  *           UDP|TCP|SCTP
 809  *   Ether / (vlan) / outer IP|IP6 / outer UDP / VXLAN-GPE / Ether / IP|IP6 /
 810  *           UDP|TCP|SCTP
 811  *   Ether / (vlan) / outer IP|IP6 / outer UDP / VXLAN-GPE / IP|IP6 /
 812  *           UDP|TCP|SCTP
 813  *   Ether / (vlan) / outer IP / outer UDP / GTP / IP|IP6 / UDP|TCP|SCTP
 814  *   Ether / (vlan) / outer IP|IP6 / GRE / Ether / IP|IP6 / UDP|TCP|SCTP
 815  *   Ether / (vlan) / outer IP|IP6 / GRE / IP|IP6 / UDP|TCP|SCTP
 816  *   Ether / (vlan) / outer IP|IP6 / IP|IP6 / UDP|TCP|SCTP
 817  *
 818  * The testpmd command line for this forward engine sets the flags
 819  * TESTPMD_TX_OFFLOAD_* in ports[tx_port].tx_ol_flags. They control
 820  * wether a checksum must be calculated in software or in hardware. The
 821  * IP, UDP, TCP and SCTP flags always concern the inner layer. The
 822  * OUTER_IP is only useful for tunnel packets.
 823  */
 824 static void
 825 pkt_burst_checksum_forward(struct fwd_stream *fs)
 826 {
 827         struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
 828         struct rte_mbuf *gso_segments[GSO_MAX_PKT_BURST];
 829         struct rte_gso_ctx *gso_ctx;
 830         struct rte_mbuf **tx_pkts_burst;
 831         struct rte_port *txp;
 832         struct rte_mbuf *m, *p;
 833         struct rte_ether_hdr *eth_hdr;
 834         void *l3_hdr = NULL, *outer_l3_hdr = NULL; /* can be IPv4 or IPv6 */
 835         void **gro_ctx;
 836         uint16_t gro_pkts_num;
 837         uint8_t gro_enable;
 838         uint16_t nb_rx;
 839         uint16_t nb_tx;
 840         uint16_t nb_prep;
 841         uint16_t i;
 842         uint64_t rx_ol_flags, tx_ol_flags;
 843         uint64_t tx_offloads;
 844         uint32_t retry;
 845         uint32_t rx_bad_ip_csum;
 846         uint32_t rx_bad_l4_csum;
 847         uint32_t rx_bad_outer_l4_csum;
 848         struct testpmd_offload_info info;
 849         uint16_t nb_segments = 0;
 850         int ret;
 851
 852         uint64_t start_tsc = 0;
 853
 854         get_start_cycles(&start_tsc);
 855
 856         /* receive a burst of packet */
 857         nb_rx = rte_eth_rx_burst(fs->rx_port, fs->rx_queue, pkts_burst,
 858                                  nb_pkt_per_burst);
 859         inc_rx_burst_stats(fs, nb_rx);
 860         if (unlikely(nb_rx == 0))
 861                 return;
 862
 863         fs->rx_packets += nb_rx;
 864         rx_bad_ip_csum = 0;
 865         rx_bad_l4_csum = 0;
 866         rx_bad_outer_l4_csum = 0;
 867         gro_enable = gro_ports[fs->rx_port].enable;
 868
 869         txp = &ports[fs->tx_port];
 870         tx_offloads = txp->dev_conf.txmode.offloads;
 871         memset(&info, 0, sizeof(info));
 872         info.tso_segsz = txp->tso_segsz;
 873         info.tunnel_tso_segsz = txp->tunnel_tso_segsz;
 874         if (gso_ports[fs->tx_port].enable)
 875                 info.gso_enable = 1;
 876
 877         for (i = 0; i < nb_rx; i++) {
 878                 if (likely(i < nb_rx - 1))
 879                         rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[i + 1],
 880                                                        void *));
 881
 882                 m = pkts_burst[i];
 883                 info.is_tunnel = 0;
 884                 info.pkt_len = rte_pktmbuf_pkt_len(m);
 885                 tx_ol_flags = m->ol_flags &
 886                               (IND_ATTACHED_MBUF | EXT_ATTACHED_MBUF);
 887                 rx_ol_flags = m->ol_flags;
 888
 889                 /* Update the L3/L4 checksum error packet statistics */
 890                 if ((rx_ol_flags & PKT_RX_IP_CKSUM_MASK) == PKT_RX_IP_CKSUM_BAD)
 891                         rx_bad_ip_csum += 1;
 892                 if ((rx_ol_flags & PKT_RX_L4_CKSUM_MASK) == PKT_RX_L4_CKSUM_BAD)
 893                         rx_bad_l4_csum += 1;
 894                 if (rx_ol_flags & PKT_RX_OUTER_L4_CKSUM_BAD)
 895                         rx_bad_outer_l4_csum += 1;
 896
 897                 /* step 1: dissect packet, parsing optional vlan, ip4/ip6, vxlan
 898                  * and inner headers */
 899
 900                 eth_hdr = rte_pktmbuf_mtod(m, struct rte_ether_hdr *);
 901                 rte_ether_addr_copy(&peer_eth_addrs[fs->peer_addr],
 902                                 &eth_hdr->d_addr);
 903                 rte_ether_addr_copy(&ports[fs->tx_port].eth_addr,
 904                                 &eth_hdr->s_addr);
 905                 parse_ethernet(eth_hdr, &info);
 906                 l3_hdr = (char *)eth_hdr + info.l2_len;
 907
 908                 /* check if it's a supported tunnel */
 909                 if (txp->parse_tunnel) {
 910                         if (info.l4_proto == IPPROTO_UDP) {
 911                                 struct rte_udp_hdr *udp_hdr;
 912
 913                                 udp_hdr = (struct rte_udp_hdr *)
 914                                         ((char *)l3_hdr + info.l3_len);
 915                                 parse_gtp(udp_hdr, &info);
 916                                 if (info.is_tunnel) {
 917                                         tx_ol_flags |= PKT_TX_TUNNEL_GTP;
 918                                         goto tunnel_update;
 919                                 }
 920                                 parse_vxlan_gpe(udp_hdr, &info);
 921                                 if (info.is_tunnel) {
 922                                         tx_ol_flags |=
 923                                                 PKT_TX_TUNNEL_VXLAN_GPE;
 924                                         goto tunnel_update;
 925                                 }
 926                                 parse_vxlan(udp_hdr, &info,
 927                                             m->packet_type);
 928                                 if (info.is_tunnel) {
 929                                         tx_ol_flags |=
 930                                                 PKT_TX_TUNNEL_VXLAN;
 931                                         goto tunnel_update;
 932                                 }
 933                                 parse_geneve(udp_hdr, &info);
 934                                 if (info.is_tunnel) {
 935                                         tx_ol_flags |=
 936                                                 PKT_TX_TUNNEL_GENEVE;
 937                                         goto tunnel_update;
 938                                 }
 939                         } else if (info.l4_proto == IPPROTO_GRE) {
 940                                 struct simple_gre_hdr *gre_hdr;
 941
 942                                 gre_hdr = (struct simple_gre_hdr *)
 943                                         ((char *)l3_hdr + info.l3_len);
 944                                 parse_gre(gre_hdr, &info);
 945                                 if (info.is_tunnel)
 946                                         tx_ol_flags |= PKT_TX_TUNNEL_GRE;
 947                         } else if (info.l4_proto == IPPROTO_IPIP) {
 948                                 void *encap_ip_hdr;
 949
 950                                 encap_ip_hdr = (char *)l3_hdr + info.l3_len;
 951                                 parse_encap_ip(encap_ip_hdr, &info);
 952                                 if (info.is_tunnel)
 953                                         tx_ol_flags |= PKT_TX_TUNNEL_IPIP;
 954                         }
 955                 }
 956
 957 tunnel_update:
 958                 /* update l3_hdr and outer_l3_hdr if a tunnel was parsed */
 959                 if (info.is_tunnel) {
 960                         outer_l3_hdr = l3_hdr;
 961                         l3_hdr = (char *)l3_hdr + info.outer_l3_len + info.l2_len;
 962                 }
 963
 964                 /* step 2: depending on user command line configuration,
 965                  * recompute checksum either in software or flag the
 966                  * mbuf to offload the calculation to the NIC. If TSO
 967                  * is configured, prepare the mbuf for TCP segmentation. */
 968
 969                 /* process checksums of inner headers first */
 970                 tx_ol_flags |= process_inner_cksums(l3_hdr, &info,
 971                         tx_offloads);
 972
 973                 /* Then process outer headers if any. Note that the software
 974                  * checksum will be wrong if one of the inner checksums is
 975                  * processed in hardware. */
 976                 if (info.is_tunnel == 1) {
 977                         tx_ol_flags |= process_outer_cksums(outer_l3_hdr, &info,
 978                                         tx_offloads,
 979                                         !!(tx_ol_flags & PKT_TX_TCP_SEG));
 980                 }
 981
 982                 /* step 3: fill the mbuf meta data (flags and header lengths) */
 983
 984                 m->tx_offload = 0;
 985                 if (info.is_tunnel == 1) {
 986                         if (info.tunnel_tso_segsz ||
 987                             (tx_offloads &
 988                              DEV_TX_OFFLOAD_OUTER_IPV4_CKSUM) ||
 989                             (tx_offloads &
 990                              DEV_TX_OFFLOAD_OUTER_UDP_CKSUM) ||
 991                             (tx_ol_flags & PKT_TX_OUTER_IPV6)) {
 992                                 m->outer_l2_len = info.outer_l2_len;
 993                                 m->outer_l3_len = info.outer_l3_len;
 994                                 m->l2_len = info.l2_len;
 995                                 m->l3_len = info.l3_len;
 996                                 m->l4_len = info.l4_len;
 997                                 m->tso_segsz = info.tunnel_tso_segsz;
 998                         }
 999                         else {
1000                                 /* if there is a outer UDP cksum
1001                                    processed in sw and the inner in hw,
1002                                    the outer checksum will be wrong as
1003                                    the payload will be modified by the
1004                                    hardware */
1005                                 m->l2_len = info.outer_l2_len +
1006                                         info.outer_l3_len + info.l2_len;
1007                                 m->l3_len = info.l3_len;
1008                                 m->l4_len = info.l4_len;
1009                         }
1010                 } else {
1011                         /* this is only useful if an offload flag is
1012                          * set, but it does not hurt to fill it in any
1013                          * case */
1014                         m->l2_len = info.l2_len;
1015                         m->l3_len = info.l3_len;
1016                         m->l4_len = info.l4_len;
1017                         m->tso_segsz = info.tso_segsz;
1018                 }
1019                 m->ol_flags = tx_ol_flags;
1020
1021                 /* Do split & copy for the packet. */
1022                 if (tx_pkt_split != TX_PKT_SPLIT_OFF) {
1023                         p = pkt_copy_split(m);
1024                         if (p != NULL) {
1025                                 rte_pktmbuf_free(m);
1026                                 m = p;
1027                                 pkts_burst[i] = m;
1028                         }
1029                 }
1030
1031                 /* if verbose mode is enabled, dump debug info */
1032                 if (verbose_level > 0) {
1033                         char buf[256];
1034
1035                         printf("-----------------\n");
1036                         printf("port=%u, mbuf=%p, pkt_len=%u, nb_segs=%u:\n",
1037                                 fs->rx_port, m, m->pkt_len, m->nb_segs);
1038                         /* dump rx parsed packet info */
1039                         rte_get_rx_ol_flag_list(rx_ol_flags, buf, sizeof(buf));
1040                         printf("rx: l2_len=%d ethertype=%x l3_len=%d "
1041                                 "l4_proto=%d l4_len=%d flags=%s\n",
1042                                 info.l2_len, rte_be_to_cpu_16(info.ethertype),
1043                                 info.l3_len, info.l4_proto, info.l4_len, buf);
1044                         if (rx_ol_flags & PKT_RX_LRO)
1045                                 printf("rx: m->lro_segsz=%u\n", m->tso_segsz);
1046                         if (info.is_tunnel == 1)
1047                                 printf("rx: outer_l2_len=%d outer_ethertype=%x "
1048                                         "outer_l3_len=%d\n", info.outer_l2_len,
1049                                         rte_be_to_cpu_16(info.outer_ethertype),
1050                                         info.outer_l3_len);
1051                         /* dump tx packet info */
1052                         if ((tx_offloads & (DEV_TX_OFFLOAD_IPV4_CKSUM |
1053                                             DEV_TX_OFFLOAD_UDP_CKSUM |
1054                                             DEV_TX_OFFLOAD_TCP_CKSUM |
1055                                             DEV_TX_OFFLOAD_SCTP_CKSUM)) ||
1056                                 info.tso_segsz != 0)
1057                                 printf("tx: m->l2_len=%d m->l3_len=%d "
1058                                         "m->l4_len=%d\n",
1059                                         m->l2_len, m->l3_len, m->l4_len);
1060                         if (info.is_tunnel == 1) {
1061                                 if ((tx_offloads &
1062                                     DEV_TX_OFFLOAD_OUTER_IPV4_CKSUM) ||
1063                                     (tx_offloads &
1064                                     DEV_TX_OFFLOAD_OUTER_UDP_CKSUM) ||
1065                                     (tx_ol_flags & PKT_TX_OUTER_IPV6))
1066                                         printf("tx: m->outer_l2_len=%d "
1067                                                 "m->outer_l3_len=%d\n",
1068                                                 m->outer_l2_len,
1069                                                 m->outer_l3_len);
1070                                 if (info.tunnel_tso_segsz != 0 &&
1071                                                 (m->ol_flags & PKT_TX_TCP_SEG))
1072                                         printf("tx: m->tso_segsz=%d\n",
1073                                                 m->tso_segsz);
1074                         } else if (info.tso_segsz != 0 &&
1075                                         (m->ol_flags & PKT_TX_TCP_SEG))
1076                                 printf("tx: m->tso_segsz=%d\n", m->tso_segsz);
1077                         rte_get_tx_ol_flag_list(m->ol_flags, buf, sizeof(buf));
1078                         printf("tx: flags=%s", buf);
1079                         printf("\n");
1080                 }
1081         }
1082
1083         if (unlikely(gro_enable)) {
1084                 if (gro_flush_cycles == GRO_DEFAULT_FLUSH_CYCLES) {
1085                         nb_rx = rte_gro_reassemble_burst(pkts_burst, nb_rx,
1086                                         &(gro_ports[fs->rx_port].param));
1087                 } else {
1088                         gro_ctx = current_fwd_lcore()->gro_ctx;
1089                         nb_rx = rte_gro_reassemble(pkts_burst, nb_rx, gro_ctx);
1090
1091                         if (++fs->gro_times >= gro_flush_cycles) {
1092                                 gro_pkts_num = rte_gro_get_pkt_count(gro_ctx);
1093                                 if (gro_pkts_num > MAX_PKT_BURST - nb_rx)
1094                                         gro_pkts_num = MAX_PKT_BURST - nb_rx;
1095
1096                                 nb_rx += rte_gro_timeout_flush(gro_ctx, 0,
1097                                                 RTE_GRO_TCP_IPV4,
1098                                                 &pkts_burst[nb_rx],
1099                                                 gro_pkts_num);
1100                                 fs->gro_times = 0;
1101                         }
1102                 }
1103         }
1104
1105         if (gso_ports[fs->tx_port].enable == 0)
1106                 tx_pkts_burst = pkts_burst;
1107         else {
1108                 gso_ctx = &(current_fwd_lcore()->gso_ctx);
1109                 gso_ctx->gso_size = gso_max_segment_size;
1110                 for (i = 0; i < nb_rx; i++) {
1111                         ret = rte_gso_segment(pkts_burst[i], gso_ctx,
1112                                         &gso_segments[nb_segments],
1113                                         GSO_MAX_PKT_BURST - nb_segments);
1114                         if (ret >= 0)
1115                                 nb_segments += ret;
1116                         else {
1117                                 TESTPMD_LOG(DEBUG, "Unable to segment packet");
1118                                 rte_pktmbuf_free(pkts_burst[i]);
1119                         }
1120                 }
1121
1122                 tx_pkts_burst = gso_segments;
1123                 nb_rx = nb_segments;
1124         }
1125
1126         nb_prep = rte_eth_tx_prepare(fs->tx_port, fs->tx_queue,
1127                         tx_pkts_burst, nb_rx);
1128         if (nb_prep != nb_rx)
1129                 printf("Preparing packet burst to transmit failed: %s\n",
1130                                 rte_strerror(rte_errno));
1131
1132         nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, tx_pkts_burst,
1133                         nb_prep);
1134
1135         /*
1136          * Retry if necessary
1137          */
1138         if (unlikely(nb_tx < nb_rx) && fs->retry_enabled) {
1139                 retry = 0;
1140                 while (nb_tx < nb_rx && retry++ < burst_tx_retry_num) {
1141                         rte_delay_us(burst_tx_delay_time);
1142                         nb_tx += rte_eth_tx_burst(fs->tx_port, fs->tx_queue,
1143                                         &tx_pkts_burst[nb_tx], nb_rx - nb_tx);
1144                 }
1145         }
1146         fs->tx_packets += nb_tx;
1147         fs->rx_bad_ip_csum += rx_bad_ip_csum;
1148         fs->rx_bad_l4_csum += rx_bad_l4_csum;
1149         fs->rx_bad_outer_l4_csum += rx_bad_outer_l4_csum;
1150
1151         inc_tx_burst_stats(fs, nb_tx);
1152         if (unlikely(nb_tx < nb_rx)) {
1153                 fs->fwd_dropped += (nb_rx - nb_tx);
1154                 do {
1155                         rte_pktmbuf_free(tx_pkts_burst[nb_tx]);
1156                 } while (++nb_tx < nb_rx);
1157         }
1158
1159         get_end_cycles(fs, start_tsc);
1160 }
1161
1162 struct fwd_engine csum_fwd_engine = {
1163         .fwd_mode_name  = "csum",
1164         .port_fwd_begin = NULL,
1165         .port_fwd_end   = NULL,
1166         .packet_fwd     = pkt_burst_checksum_forward,
1167 };