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
 227         /*
 228          * Check message type. If message type is 0xff, it is
 229          * a GTP data packet. If not, it is a GTP control packet
 230          */
 231         if (gtp_hdr->msg_type == 0xff) {
 232                 ip_ver = *(uint8_t *)((char *)udp_hdr +
 233                          sizeof(struct rte_udp_hdr) +
 234                          sizeof(struct rte_gtp_hdr));
 235                 ip_ver = (ip_ver) & 0xf0;
 236
 237                 if (ip_ver == RTE_GTP_TYPE_IPV4) {
 238                         ipv4_hdr = (struct rte_ipv4_hdr *)((char *)gtp_hdr +
 239                                    gtp_len);
 240                         info->ethertype = _htons(RTE_ETHER_TYPE_IPV4);
 241                         parse_ipv4(ipv4_hdr, info);
 242                 } else if (ip_ver == RTE_GTP_TYPE_IPV6) {
 243                         ipv6_hdr = (struct rte_ipv6_hdr *)((char *)gtp_hdr +
 244                                    gtp_len);
 245                         info->ethertype = _htons(RTE_ETHER_TYPE_IPV6);
 246                         parse_ipv6(ipv6_hdr, info);
 247                 }
 248         } else {
 249                 info->ethertype = 0;
 250                 info->l4_len = 0;
 251                 info->l3_len = 0;
 252                 info->l4_proto = 0;
 253         }
 254
 255         info->l2_len += RTE_ETHER_GTP_HLEN;
 256 }
 257
 258 /* Parse a vxlan header */
 259 static void
 260 parse_vxlan(struct rte_udp_hdr *udp_hdr,
 261             struct testpmd_offload_info *info)
 262 {
 263         struct rte_ether_hdr *eth_hdr;
 264
 265         /* check udp destination port, RTE_VXLAN_DEFAULT_PORT (4789) is the
 266          * default vxlan port (rfc7348) or that the rx offload flag is set
 267          * (i40e only currently)
 268          */
 269         if (udp_hdr->dst_port != _htons(RTE_VXLAN_DEFAULT_PORT))
 270                 return;
 271
 272         update_tunnel_outer(info);
 273
 274         eth_hdr = (struct rte_ether_hdr *)((char *)udp_hdr +
 275                 sizeof(struct rte_udp_hdr) +
 276                 sizeof(struct rte_vxlan_hdr));
 277
 278         parse_ethernet(eth_hdr, info);
 279         info->l2_len += RTE_ETHER_VXLAN_HLEN; /* add udp + vxlan */
 280 }
 281
 282 /* Parse a vxlan-gpe header */
 283 static void
 284 parse_vxlan_gpe(struct rte_udp_hdr *udp_hdr,
 285             struct testpmd_offload_info *info)
 286 {
 287         struct rte_ether_hdr *eth_hdr;
 288         struct rte_ipv4_hdr *ipv4_hdr;
 289         struct rte_ipv6_hdr *ipv6_hdr;
 290         struct rte_vxlan_gpe_hdr *vxlan_gpe_hdr;
 291         uint8_t vxlan_gpe_len = sizeof(*vxlan_gpe_hdr);
 292
 293         /* Check udp destination port. */
 294         if (udp_hdr->dst_port != _htons(vxlan_gpe_udp_port))
 295                 return;
 296
 297         vxlan_gpe_hdr = (struct rte_vxlan_gpe_hdr *)((char *)udp_hdr +
 298                                 sizeof(struct rte_udp_hdr));
 299
 300         if (!vxlan_gpe_hdr->proto || vxlan_gpe_hdr->proto ==
 301             RTE_VXLAN_GPE_TYPE_IPV4) {
 302                 update_tunnel_outer(info);
 303
 304                 ipv4_hdr = (struct rte_ipv4_hdr *)((char *)vxlan_gpe_hdr +
 305                            vxlan_gpe_len);
 306
 307                 parse_ipv4(ipv4_hdr, info);
 308                 info->ethertype = _htons(RTE_ETHER_TYPE_IPV4);
 309                 info->l2_len = 0;
 310
 311         } else if (vxlan_gpe_hdr->proto == RTE_VXLAN_GPE_TYPE_IPV6) {
 312                 update_tunnel_outer(info);
 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                 update_tunnel_outer(info);
 323
 324                 eth_hdr = (struct rte_ether_hdr *)((char *)vxlan_gpe_hdr +
 325                           vxlan_gpe_len);
 326
 327                 parse_ethernet(eth_hdr, info);
 328         } else
 329                 return;
 330
 331         info->l2_len += RTE_ETHER_VXLAN_GPE_HLEN;
 332 }
 333
 334 /* Parse a geneve header */
 335 static void
 336 parse_geneve(struct rte_udp_hdr *udp_hdr,
 337             struct testpmd_offload_info *info)
 338 {
 339         struct rte_ether_hdr *eth_hdr;
 340         struct rte_ipv4_hdr *ipv4_hdr;
 341         struct rte_ipv6_hdr *ipv6_hdr;
 342         struct rte_geneve_hdr *geneve_hdr;
 343         uint16_t geneve_len;
 344
 345         /* Check udp destination port. */
 346         if (udp_hdr->dst_port != _htons(geneve_udp_port))
 347                 return;
 348
 349         geneve_hdr = (struct rte_geneve_hdr *)((char *)udp_hdr +
 350                                 sizeof(struct rte_udp_hdr));
 351         geneve_len = sizeof(struct rte_geneve_hdr) + geneve_hdr->opt_len * 4;
 352         if (!geneve_hdr->proto || geneve_hdr->proto ==
 353             _htons(RTE_ETHER_TYPE_IPV4)) {
 354                 update_tunnel_outer(info);
 355                 ipv4_hdr = (struct rte_ipv4_hdr *)((char *)geneve_hdr +
 356                            geneve_len);
 357                 parse_ipv4(ipv4_hdr, info);
 358                 info->ethertype = _htons(RTE_ETHER_TYPE_IPV4);
 359                 info->l2_len = 0;
 360         } else if (geneve_hdr->proto == _htons(RTE_ETHER_TYPE_IPV6)) {
 361                 update_tunnel_outer(info);
 362                 ipv6_hdr = (struct rte_ipv6_hdr *)((char *)geneve_hdr +
 363                            geneve_len);
 364                 info->ethertype = _htons(RTE_ETHER_TYPE_IPV6);
 365                 parse_ipv6(ipv6_hdr, info);
 366                 info->l2_len = 0;
 367
 368         } else if (geneve_hdr->proto == _htons(RTE_GENEVE_TYPE_ETH)) {
 369                 update_tunnel_outer(info);
 370                 eth_hdr = (struct rte_ether_hdr *)((char *)geneve_hdr +
 371                           geneve_len);
 372                 parse_ethernet(eth_hdr, info);
 373         } else
 374                 return;
 375
 376         info->l2_len +=
 377                 (sizeof(struct rte_udp_hdr) + sizeof(struct rte_geneve_hdr) +
 378                 ((struct rte_geneve_hdr *)geneve_hdr)->opt_len * 4);
 379 }
 380
 381 /* Parse a gre header */
 382 static void
 383 parse_gre(struct simple_gre_hdr *gre_hdr, struct testpmd_offload_info *info)
 384 {
 385         struct rte_ether_hdr *eth_hdr;
 386         struct rte_ipv4_hdr *ipv4_hdr;
 387         struct rte_ipv6_hdr *ipv6_hdr;
 388         uint8_t gre_len = 0;
 389
 390         gre_len += sizeof(struct simple_gre_hdr);
 391
 392         if (gre_hdr->flags & _htons(GRE_KEY_PRESENT))
 393                 gre_len += GRE_EXT_LEN;
 394         if (gre_hdr->flags & _htons(GRE_SEQUENCE_PRESENT))
 395                 gre_len += GRE_EXT_LEN;
 396         if (gre_hdr->flags & _htons(GRE_CHECKSUM_PRESENT))
 397                 gre_len += GRE_EXT_LEN;
 398
 399         if (gre_hdr->proto == _htons(RTE_ETHER_TYPE_IPV4)) {
 400                 update_tunnel_outer(info);
 401
 402                 ipv4_hdr = (struct rte_ipv4_hdr *)((char *)gre_hdr + gre_len);
 403
 404                 parse_ipv4(ipv4_hdr, info);
 405                 info->ethertype = _htons(RTE_ETHER_TYPE_IPV4);
 406                 info->l2_len = 0;
 407
 408         } else if (gre_hdr->proto == _htons(RTE_ETHER_TYPE_IPV6)) {
 409                 update_tunnel_outer(info);
 410
 411                 ipv6_hdr = (struct rte_ipv6_hdr *)((char *)gre_hdr + gre_len);
 412
 413                 info->ethertype = _htons(RTE_ETHER_TYPE_IPV6);
 414                 parse_ipv6(ipv6_hdr, info);
 415                 info->l2_len = 0;
 416
 417         } else if (gre_hdr->proto == _htons(RTE_ETHER_TYPE_TEB)) {
 418                 update_tunnel_outer(info);
 419
 420                 eth_hdr = (struct rte_ether_hdr *)((char *)gre_hdr + gre_len);
 421
 422                 parse_ethernet(eth_hdr, info);
 423         } else
 424                 return;
 425
 426         info->l2_len += gre_len;
 427 }
 428
 429
 430 /* Parse an encapsulated ip or ipv6 header */
 431 static void
 432 parse_encap_ip(void *encap_ip, struct testpmd_offload_info *info)
 433 {
 434         struct rte_ipv4_hdr *ipv4_hdr = encap_ip;
 435         struct rte_ipv6_hdr *ipv6_hdr = encap_ip;
 436         uint8_t ip_version;
 437
 438         ip_version = (ipv4_hdr->version_ihl & 0xf0) >> 4;
 439
 440         if (ip_version != 4 && ip_version != 6)
 441                 return;
 442
 443         info->is_tunnel = 1;
 444         info->outer_ethertype = info->ethertype;
 445         info->outer_l2_len = info->l2_len;
 446         info->outer_l3_len = info->l3_len;
 447
 448         if (ip_version == 4) {
 449                 parse_ipv4(ipv4_hdr, info);
 450                 info->ethertype = _htons(RTE_ETHER_TYPE_IPV4);
 451         } else {
 452                 parse_ipv6(ipv6_hdr, info);
 453                 info->ethertype = _htons(RTE_ETHER_TYPE_IPV6);
 454         }
 455         info->l2_len = 0;
 456 }
 457
 458 /* if possible, calculate the checksum of a packet in hw or sw,
 459  * depending on the testpmd command line configuration */
 460 static uint64_t
 461 process_inner_cksums(void *l3_hdr, const struct testpmd_offload_info *info,
 462         uint64_t tx_offloads, struct rte_mbuf *m)
 463 {
 464         struct rte_ipv4_hdr *ipv4_hdr = l3_hdr;
 465         struct rte_udp_hdr *udp_hdr;
 466         struct rte_tcp_hdr *tcp_hdr;
 467         struct rte_sctp_hdr *sctp_hdr;
 468         uint64_t ol_flags = 0;
 469         uint32_t max_pkt_len, tso_segsz = 0;
 470         uint16_t l4_off;
 471
 472         /* ensure packet is large enough to require tso */
 473         if (!info->is_tunnel) {
 474                 max_pkt_len = info->l2_len + info->l3_len + info->l4_len +
 475                         info->tso_segsz;
 476                 if (info->tso_segsz != 0 && info->pkt_len > max_pkt_len)
 477                         tso_segsz = info->tso_segsz;
 478         } else {
 479                 max_pkt_len = info->outer_l2_len + info->outer_l3_len +
 480                         info->l2_len + info->l3_len + info->l4_len +
 481                         info->tunnel_tso_segsz;
 482                 if (info->tunnel_tso_segsz != 0 && info->pkt_len > max_pkt_len)
 483                         tso_segsz = info->tunnel_tso_segsz;
 484         }
 485
 486         if (info->ethertype == _htons(RTE_ETHER_TYPE_IPV4)) {
 487                 ipv4_hdr = l3_hdr;
 488
 489                 ol_flags |= RTE_MBUF_F_TX_IPV4;
 490                 if (info->l4_proto == IPPROTO_TCP && tso_segsz) {
 491                         ol_flags |= RTE_MBUF_F_TX_IP_CKSUM;
 492                 } else {
 493                         if (tx_offloads & RTE_ETH_TX_OFFLOAD_IPV4_CKSUM) {
 494                                 ol_flags |= RTE_MBUF_F_TX_IP_CKSUM;
 495                         } else {
 496                                 ipv4_hdr->hdr_checksum = 0;
 497                                 ipv4_hdr->hdr_checksum =
 498                                         rte_ipv4_cksum(ipv4_hdr);
 499                         }
 500                 }
 501         } else if (info->ethertype == _htons(RTE_ETHER_TYPE_IPV6))
 502                 ol_flags |= RTE_MBUF_F_TX_IPV6;
 503         else
 504                 return 0; /* packet type not supported, nothing to do */
 505
 506         if (info->l4_proto == IPPROTO_UDP) {
 507                 udp_hdr = (struct rte_udp_hdr *)((char *)l3_hdr + info->l3_len);
 508                 /* do not recalculate udp cksum if it was 0 */
 509                 if (udp_hdr->dgram_cksum != 0) {
 510                         if (tx_offloads & RTE_ETH_TX_OFFLOAD_UDP_CKSUM) {
 511                                 ol_flags |= RTE_MBUF_F_TX_UDP_CKSUM;
 512                         } else {
 513                                 if (info->is_tunnel)
 514                                         l4_off = info->outer_l2_len +
 515                                                  info->outer_l3_len +
 516                                                  info->l2_len + info->l3_len;
 517                                 else
 518                                         l4_off = info->l2_len + info->l3_len;
 519                                 udp_hdr->dgram_cksum = 0;
 520                                 udp_hdr->dgram_cksum =
 521                                         get_udptcp_checksum(m, l3_hdr, l4_off,
 522                                                 info->ethertype);
 523                         }
 524                 }
 525 #ifdef RTE_LIB_GSO
 526                 if (info->gso_enable)
 527                         ol_flags |= RTE_MBUF_F_TX_UDP_SEG;
 528 #endif
 529         } else if (info->l4_proto == IPPROTO_TCP) {
 530                 tcp_hdr = (struct rte_tcp_hdr *)((char *)l3_hdr + info->l3_len);
 531                 if (tso_segsz)
 532                         ol_flags |= RTE_MBUF_F_TX_TCP_SEG;
 533                 else if (tx_offloads & RTE_ETH_TX_OFFLOAD_TCP_CKSUM) {
 534                         ol_flags |= RTE_MBUF_F_TX_TCP_CKSUM;
 535                 } else {
 536                         if (info->is_tunnel)
 537                                 l4_off = info->outer_l2_len + info->outer_l3_len +
 538                                          info->l2_len + info->l3_len;
 539                         else
 540                                 l4_off = info->l2_len + info->l3_len;
 541                         tcp_hdr->cksum = 0;
 542                         tcp_hdr->cksum =
 543                                 get_udptcp_checksum(m, l3_hdr, l4_off,
 544                                         info->ethertype);
 545                 }
 546 #ifdef RTE_LIB_GSO
 547                 if (info->gso_enable)
 548                         ol_flags |= RTE_MBUF_F_TX_TCP_SEG;
 549 #endif
 550         } else if (info->l4_proto == IPPROTO_SCTP) {
 551                 sctp_hdr = (struct rte_sctp_hdr *)
 552                         ((char *)l3_hdr + info->l3_len);
 553                 /* sctp payload must be a multiple of 4 to be
 554                  * offloaded */
 555                 if ((tx_offloads & RTE_ETH_TX_OFFLOAD_SCTP_CKSUM) &&
 556                         ((ipv4_hdr->total_length & 0x3) == 0)) {
 557                         ol_flags |= RTE_MBUF_F_TX_SCTP_CKSUM;
 558                 } else {
 559                         sctp_hdr->cksum = 0;
 560                         /* XXX implement CRC32c, example available in
 561                          * RFC3309 */
 562                 }
 563         }
 564
 565         return ol_flags;
 566 }
 567
 568 /* Calculate the checksum of outer header */
 569 static uint64_t
 570 process_outer_cksums(void *outer_l3_hdr, struct testpmd_offload_info *info,
 571         uint64_t tx_offloads, int tso_enabled, struct rte_mbuf *m)
 572 {
 573         struct rte_ipv4_hdr *ipv4_hdr = outer_l3_hdr;
 574         struct rte_ipv6_hdr *ipv6_hdr = outer_l3_hdr;
 575         struct rte_udp_hdr *udp_hdr;
 576         uint64_t ol_flags = 0;
 577
 578         if (info->outer_ethertype == _htons(RTE_ETHER_TYPE_IPV4)) {
 579                 ipv4_hdr->hdr_checksum = 0;
 580                 ol_flags |= RTE_MBUF_F_TX_OUTER_IPV4;
 581
 582                 if (tx_offloads & RTE_ETH_TX_OFFLOAD_OUTER_IPV4_CKSUM)
 583                         ol_flags |= RTE_MBUF_F_TX_OUTER_IP_CKSUM;
 584                 else
 585                         ipv4_hdr->hdr_checksum = rte_ipv4_cksum(ipv4_hdr);
 586         } else
 587                 ol_flags |= RTE_MBUF_F_TX_OUTER_IPV6;
 588
 589         if (info->outer_l4_proto != IPPROTO_UDP)
 590                 return ol_flags;
 591
 592         udp_hdr = (struct rte_udp_hdr *)
 593                 ((char *)outer_l3_hdr + info->outer_l3_len);
 594
 595         if (tso_enabled)
 596                 ol_flags |= RTE_MBUF_F_TX_TCP_SEG;
 597
 598         /* Skip SW outer UDP checksum generation if HW supports it */
 599         if (tx_offloads & RTE_ETH_TX_OFFLOAD_OUTER_UDP_CKSUM) {
 600                 if (info->outer_ethertype == _htons(RTE_ETHER_TYPE_IPV4))
 601                         udp_hdr->dgram_cksum
 602                                 = rte_ipv4_phdr_cksum(ipv4_hdr, ol_flags);
 603                 else
 604                         udp_hdr->dgram_cksum
 605                                 = rte_ipv6_phdr_cksum(ipv6_hdr, ol_flags);
 606
 607                 ol_flags |= RTE_MBUF_F_TX_OUTER_UDP_CKSUM;
 608                 return ol_flags;
 609         }
 610
 611         /* outer UDP checksum is done in software. In the other side, for
 612          * UDP tunneling, like VXLAN or Geneve, outer UDP checksum can be
 613          * set to zero.
 614          *
 615          * If a packet will be TSOed into small packets by NIC, we cannot
 616          * set/calculate a non-zero checksum, because it will be a wrong
 617          * value after the packet be split into several small packets.
 618          */
 619         if (tso_enabled)
 620                 udp_hdr->dgram_cksum = 0;
 621
 622         /* do not recalculate udp cksum if it was 0 */
 623         if (udp_hdr->dgram_cksum != 0) {
 624                 udp_hdr->dgram_cksum = 0;
 625                 udp_hdr->dgram_cksum = get_udptcp_checksum(m, outer_l3_hdr,
 626                                         info->outer_l2_len + info->outer_l3_len,
 627                                         info->outer_ethertype);
 628         }
 629
 630         return ol_flags;
 631 }
 632
 633 /*
 634  * Helper function.
 635  * Performs actual copying.
 636  * Returns number of segments in the destination mbuf on success,
 637  * or negative error code on failure.
 638  */
 639 static int
 640 mbuf_copy_split(const struct rte_mbuf *ms, struct rte_mbuf *md[],
 641         uint16_t seglen[], uint8_t nb_seg)
 642 {
 643         uint32_t dlen, slen, tlen;
 644         uint32_t i, len;
 645         const struct rte_mbuf *m;
 646         const uint8_t *src;
 647         uint8_t *dst;
 648
 649         dlen = 0;
 650         slen = 0;
 651         tlen = 0;
 652
 653         dst = NULL;
 654         src = NULL;
 655
 656         m = ms;
 657         i = 0;
 658         while (ms != NULL && i != nb_seg) {
 659
 660                 if (slen == 0) {
 661                         slen = rte_pktmbuf_data_len(ms);
 662                         src = rte_pktmbuf_mtod(ms, const uint8_t *);
 663                 }
 664
 665                 if (dlen == 0) {
 666                         dlen = RTE_MIN(seglen[i], slen);
 667                         md[i]->data_len = dlen;
 668                         md[i]->next = (i + 1 == nb_seg) ? NULL : md[i + 1];
 669                         dst = rte_pktmbuf_mtod(md[i], uint8_t *);
 670                 }
 671
 672                 len = RTE_MIN(slen, dlen);
 673                 memcpy(dst, src, len);
 674                 tlen += len;
 675                 slen -= len;
 676                 dlen -= len;
 677                 src += len;
 678                 dst += len;
 679
 680                 if (slen == 0)
 681                         ms = ms->next;
 682                 if (dlen == 0)
 683                         i++;
 684         }
 685
 686         if (ms != NULL)
 687                 return -ENOBUFS;
 688         else if (tlen != m->pkt_len)
 689                 return -EINVAL;
 690
 691         md[0]->nb_segs = nb_seg;
 692         md[0]->pkt_len = tlen;
 693         md[0]->vlan_tci = m->vlan_tci;
 694         md[0]->vlan_tci_outer = m->vlan_tci_outer;
 695         md[0]->ol_flags = m->ol_flags;
 696         md[0]->tx_offload = m->tx_offload;
 697
 698         return nb_seg;
 699 }
 700
 701 /*
 702  * Allocate a new mbuf with up to tx_pkt_nb_segs segments.
 703  * Copy packet contents and offload information into the new segmented mbuf.
 704  */
 705 static struct rte_mbuf *
 706 pkt_copy_split(const struct rte_mbuf *pkt)
 707 {
 708         int32_t n, rc;
 709         uint32_t i, len, nb_seg;
 710         struct rte_mempool *mp;
 711         uint16_t seglen[RTE_MAX_SEGS_PER_PKT];
 712         struct rte_mbuf *p, *md[RTE_MAX_SEGS_PER_PKT];
 713
 714         mp = current_fwd_lcore()->mbp;
 715
 716         if (tx_pkt_split == TX_PKT_SPLIT_RND)
 717                 nb_seg = rte_rand() % tx_pkt_nb_segs + 1;
 718         else
 719                 nb_seg = tx_pkt_nb_segs;
 720
 721         memcpy(seglen, tx_pkt_seg_lengths, nb_seg * sizeof(seglen[0]));
 722
 723         /* calculate number of segments to use and their length. */
 724         len = 0;
 725         for (i = 0; i != nb_seg && len < pkt->pkt_len; i++) {
 726                 len += seglen[i];
 727                 md[i] = NULL;
 728         }
 729
 730         n = pkt->pkt_len - len;
 731
 732         /* update size of the last segment to fit rest of the packet */
 733         if (n >= 0) {
 734                 seglen[i - 1] += n;
 735                 len += n;
 736         }
 737
 738         nb_seg = i;
 739         while (i != 0) {
 740                 p = rte_pktmbuf_alloc(mp);
 741                 if (p == NULL) {
 742                         TESTPMD_LOG(ERR,
 743                                 "failed to allocate %u-th of %u mbuf "
 744                                 "from mempool: %s\n",
 745                                 nb_seg - i, nb_seg, mp->name);
 746                         break;
 747                 }
 748
 749                 md[--i] = p;
 750                 if (rte_pktmbuf_tailroom(md[i]) < seglen[i]) {
 751                         TESTPMD_LOG(ERR, "mempool %s, %u-th segment: "
 752                                 "expected seglen: %u, "
 753                                 "actual mbuf tailroom: %u\n",
 754                                 mp->name, i, seglen[i],
 755                                 rte_pktmbuf_tailroom(md[i]));
 756                         break;
 757                 }
 758         }
 759
 760         /* all mbufs successfully allocated, do copy */
 761         if (i == 0) {
 762                 rc = mbuf_copy_split(pkt, md, seglen, nb_seg);
 763                 if (rc < 0)
 764                         TESTPMD_LOG(ERR,
 765                                 "mbuf_copy_split for %p(len=%u, nb_seg=%u) "
 766                                 "into %u segments failed with error code: %d\n",
 767                                 pkt, pkt->pkt_len, pkt->nb_segs, nb_seg, rc);
 768
 769                 /* figure out how many mbufs to free. */
 770                 i = RTE_MAX(rc, 0);
 771         }
 772
 773         /* free unused mbufs */
 774         for (; i != nb_seg; i++) {
 775                 rte_pktmbuf_free_seg(md[i]);
 776                 md[i] = NULL;
 777         }
 778
 779         return md[0];
 780 }
 781
 782 /*
 783  * Receive a burst of packets, and for each packet:
 784  *  - parse packet, and try to recognize a supported packet type (1)
 785  *  - if it's not a supported packet type, don't touch the packet, else:
 786  *  - reprocess the checksum of all supported layers. This is done in SW
 787  *    or HW, depending on testpmd command line configuration
 788  *  - if TSO is enabled in testpmd command line, also flag the mbuf for TCP
 789  *    segmentation offload (this implies HW TCP checksum)
 790  * Then transmit packets on the output port.
 791  *
 792  * (1) Supported packets are:
 793  *   Ether / (vlan) / IP|IP6 / UDP|TCP|SCTP .
 794  *   Ether / (vlan) / outer IP|IP6 / outer UDP / VxLAN / Ether / IP|IP6 /
 795  *           UDP|TCP|SCTP
 796  *   Ether / (vlan) / outer IP|IP6 / outer UDP / VXLAN-GPE / Ether / IP|IP6 /
 797  *           UDP|TCP|SCTP
 798  *   Ether / (vlan) / outer IP|IP6 / outer UDP / VXLAN-GPE / IP|IP6 /
 799  *           UDP|TCP|SCTP
 800  *   Ether / (vlan) / outer IP / outer UDP / GTP / IP|IP6 / UDP|TCP|SCTP
 801  *   Ether / (vlan) / outer IP|IP6 / GRE / Ether / IP|IP6 / UDP|TCP|SCTP
 802  *   Ether / (vlan) / outer IP|IP6 / GRE / IP|IP6 / UDP|TCP|SCTP
 803  *   Ether / (vlan) / outer IP|IP6 / IP|IP6 / UDP|TCP|SCTP
 804  *
 805  * The testpmd command line for this forward engine sets the flags
 806  * TESTPMD_TX_OFFLOAD_* in ports[tx_port].tx_ol_flags. They control
 807  * whether a checksum must be calculated in software or in hardware. The
 808  * IP, UDP, TCP and SCTP flags always concern the inner layer. The
 809  * OUTER_IP is only useful for tunnel packets.
 810  */
 811 static void
 812 pkt_burst_checksum_forward(struct fwd_stream *fs)
 813 {
 814         struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
 815 #ifdef RTE_LIB_GSO
 816         struct rte_mbuf *gso_segments[GSO_MAX_PKT_BURST];
 817         struct rte_gso_ctx *gso_ctx;
 818 #endif
 819         struct rte_mbuf **tx_pkts_burst;
 820         struct rte_port *txp;
 821         struct rte_mbuf *m, *p;
 822         struct rte_ether_hdr *eth_hdr;
 823         void *l3_hdr = NULL, *outer_l3_hdr = NULL; /* can be IPv4 or IPv6 */
 824 #ifdef RTE_LIB_GRO
 825         void **gro_ctx;
 826         uint16_t gro_pkts_num;
 827         uint8_t gro_enable;
 828 #endif
 829         uint16_t nb_rx;
 830         uint16_t nb_tx;
 831         uint16_t nb_prep;
 832         uint16_t i;
 833         uint64_t rx_ol_flags, tx_ol_flags;
 834         uint64_t tx_offloads;
 835         uint32_t retry;
 836         uint32_t rx_bad_ip_csum;
 837         uint32_t rx_bad_l4_csum;
 838         uint32_t rx_bad_outer_l4_csum;
 839         uint32_t rx_bad_outer_ip_csum;
 840         struct testpmd_offload_info info;
 841
 842         uint64_t start_tsc = 0;
 843
 844         get_start_cycles(&start_tsc);
 845
 846         /* receive a burst of packet */
 847         nb_rx = rte_eth_rx_burst(fs->rx_port, fs->rx_queue, pkts_burst,
 848                                  nb_pkt_per_burst);
 849         inc_rx_burst_stats(fs, nb_rx);
 850         if (unlikely(nb_rx == 0))
 851                 return;
 852
 853         fs->rx_packets += nb_rx;
 854         rx_bad_ip_csum = 0;
 855         rx_bad_l4_csum = 0;
 856         rx_bad_outer_l4_csum = 0;
 857         rx_bad_outer_ip_csum = 0;
 858 #ifdef RTE_LIB_GRO
 859         gro_enable = gro_ports[fs->rx_port].enable;
 860 #endif
 861
 862         txp = &ports[fs->tx_port];
 863         tx_offloads = txp->dev_conf.txmode.offloads;
 864         memset(&info, 0, sizeof(info));
 865         info.tso_segsz = txp->tso_segsz;
 866         info.tunnel_tso_segsz = txp->tunnel_tso_segsz;
 867 #ifdef RTE_LIB_GSO
 868         if (gso_ports[fs->tx_port].enable)
 869                 info.gso_enable = 1;
 870 #endif
 871
 872         for (i = 0; i < nb_rx; i++) {
 873                 if (likely(i < nb_rx - 1))
 874                         rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[i + 1],
 875                                                        void *));
 876
 877                 m = pkts_burst[i];
 878                 info.is_tunnel = 0;
 879                 info.pkt_len = rte_pktmbuf_pkt_len(m);
 880                 tx_ol_flags = m->ol_flags &
 881                               (RTE_MBUF_F_INDIRECT | RTE_MBUF_F_EXTERNAL);
 882                 rx_ol_flags = m->ol_flags;
 883
 884                 /* Update the L3/L4 checksum error packet statistics */
 885                 if ((rx_ol_flags & RTE_MBUF_F_RX_IP_CKSUM_MASK) == RTE_MBUF_F_RX_IP_CKSUM_BAD)
 886                         rx_bad_ip_csum += 1;
 887                 if ((rx_ol_flags & RTE_MBUF_F_RX_L4_CKSUM_MASK) == RTE_MBUF_F_RX_L4_CKSUM_BAD)
 888                         rx_bad_l4_csum += 1;
 889                 if (rx_ol_flags & RTE_MBUF_F_RX_OUTER_L4_CKSUM_BAD)
 890                         rx_bad_outer_l4_csum += 1;
 891                 if (rx_ol_flags & RTE_MBUF_F_RX_OUTER_IP_CKSUM_BAD)
 892                         rx_bad_outer_ip_csum += 1;
 893
 894                 /* step 1: dissect packet, parsing optional vlan, ip4/ip6, vxlan
 895                  * and inner headers */
 896
 897                 eth_hdr = rte_pktmbuf_mtod(m, struct rte_ether_hdr *);
 898                 rte_ether_addr_copy(&peer_eth_addrs[fs->peer_addr],
 899                                 &eth_hdr->dst_addr);
 900                 rte_ether_addr_copy(&ports[fs->tx_port].eth_addr,
 901                                 &eth_hdr->src_addr);
 902                 parse_ethernet(eth_hdr, &info);
 903                 l3_hdr = (char *)eth_hdr + info.l2_len;
 904
 905                 /* check if it's a supported tunnel */
 906                 if (txp->parse_tunnel) {
 907                         if (info.l4_proto == IPPROTO_UDP) {
 908                                 struct rte_udp_hdr *udp_hdr;
 909
 910                                 udp_hdr = (struct rte_udp_hdr *)
 911                                         ((char *)l3_hdr + info.l3_len);
 912                                 parse_gtp(udp_hdr, &info);
 913                                 if (info.is_tunnel) {
 914                                         tx_ol_flags |= RTE_MBUF_F_TX_TUNNEL_GTP;
 915                                         goto tunnel_update;
 916                                 }
 917                                 parse_vxlan_gpe(udp_hdr, &info);
 918                                 if (info.is_tunnel) {
 919                                         tx_ol_flags |=
 920                                                 RTE_MBUF_F_TX_TUNNEL_VXLAN_GPE;
 921                                         goto tunnel_update;
 922                                 }
 923                                 parse_vxlan(udp_hdr, &info);
 924                                 if (info.is_tunnel) {
 925                                         tx_ol_flags |=
 926                                                 RTE_MBUF_F_TX_TUNNEL_VXLAN;
 927                                         goto tunnel_update;
 928                                 }
 929                                 parse_geneve(udp_hdr, &info);
 930                                 if (info.is_tunnel) {
 931                                         tx_ol_flags |=
 932                                                 RTE_MBUF_F_TX_TUNNEL_GENEVE;
 933                                         goto tunnel_update;
 934                                 }
 935                                 /* Always keep last. */
 936                                 if (unlikely(RTE_ETH_IS_TUNNEL_PKT(
 937                                                         m->packet_type) != 0)) {
 938                                         TESTPMD_LOG(DEBUG, "Unknown tunnel packet. UDP dst port: %hu",
 939                                                 udp_hdr->dst_port);
 940                                 }
 941                         } else if (info.l4_proto == IPPROTO_GRE) {
 942                                 struct simple_gre_hdr *gre_hdr;
 943
 944                                 gre_hdr = (struct simple_gre_hdr *)
 945                                         ((char *)l3_hdr + info.l3_len);
 946                                 parse_gre(gre_hdr, &info);
 947                                 if (info.is_tunnel)
 948                                         tx_ol_flags |= RTE_MBUF_F_TX_TUNNEL_GRE;
 949                         } else if (info.l4_proto == IPPROTO_IPIP) {
 950                                 void *encap_ip_hdr;
 951
 952                                 encap_ip_hdr = (char *)l3_hdr + info.l3_len;
 953                                 parse_encap_ip(encap_ip_hdr, &info);
 954                                 if (info.is_tunnel)
 955                                         tx_ol_flags |= RTE_MBUF_F_TX_TUNNEL_IPIP;
 956                         }
 957                 }
 958
 959 tunnel_update:
 960                 /* update l3_hdr and outer_l3_hdr if a tunnel was parsed */
 961                 if (info.is_tunnel) {
 962                         outer_l3_hdr = l3_hdr;
 963                         l3_hdr = (char *)l3_hdr + info.outer_l3_len + info.l2_len;
 964                 }
 965
 966                 /* step 2: depending on user command line configuration,
 967                  * recompute checksum either in software or flag the
 968                  * mbuf to offload the calculation to the NIC. If TSO
 969                  * is configured, prepare the mbuf for TCP segmentation. */
 970
 971                 /* process checksums of inner headers first */
 972                 tx_ol_flags |= process_inner_cksums(l3_hdr, &info,
 973                         tx_offloads, m);
 974
 975                 /* Then process outer headers if any. Note that the software
 976                  * checksum will be wrong if one of the inner checksums is
 977                  * processed in hardware. */
 978                 if (info.is_tunnel == 1) {
 979                         tx_ol_flags |= process_outer_cksums(outer_l3_hdr, &info,
 980                                         tx_offloads,
 981                                         !!(tx_ol_flags & RTE_MBUF_F_TX_TCP_SEG),
 982                                         m);
 983                 }
 984
 985                 /* step 3: fill the mbuf meta data (flags and header lengths) */
 986
 987                 m->tx_offload = 0;
 988                 if (info.is_tunnel == 1) {
 989                         if (info.tunnel_tso_segsz ||
 990                             (tx_offloads &
 991                              RTE_ETH_TX_OFFLOAD_OUTER_IPV4_CKSUM) ||
 992                             (tx_offloads &
 993                              RTE_ETH_TX_OFFLOAD_OUTER_UDP_CKSUM)) {
 994                                 m->outer_l2_len = info.outer_l2_len;
 995                                 m->outer_l3_len = info.outer_l3_len;
 996                                 m->l2_len = info.l2_len;
 997                                 m->l3_len = info.l3_len;
 998                                 m->l4_len = info.l4_len;
 999                                 m->tso_segsz = info.tunnel_tso_segsz;
1000                         }
1001                         else {
1002                                 /* if there is a outer UDP cksum
1003                                    processed in sw and the inner in hw,
1004                                    the outer checksum will be wrong as
1005                                    the payload will be modified by the
1006                                    hardware */
1007                                 m->l2_len = info.outer_l2_len +
1008                                         info.outer_l3_len + info.l2_len;
1009                                 m->l3_len = info.l3_len;
1010                                 m->l4_len = info.l4_len;
1011                         }
1012                 } else {
1013                         /* this is only useful if an offload flag is
1014                          * set, but it does not hurt to fill it in any
1015                          * case */
1016                         m->l2_len = info.l2_len;
1017                         m->l3_len = info.l3_len;
1018                         m->l4_len = info.l4_len;
1019                         m->tso_segsz = info.tso_segsz;
1020                 }
1021                 m->ol_flags = tx_ol_flags;
1022
1023                 /* Do split & copy for the packet. */
1024                 if (tx_pkt_split != TX_PKT_SPLIT_OFF) {
1025                         p = pkt_copy_split(m);
1026                         if (p != NULL) {
1027                                 rte_pktmbuf_free(m);
1028                                 m = p;
1029                                 pkts_burst[i] = m;
1030                         }
1031                 }
1032
1033                 /* if verbose mode is enabled, dump debug info */
1034                 if (verbose_level > 0) {
1035                         char buf[256];
1036
1037                         printf("-----------------\n");
1038                         printf("port=%u, mbuf=%p, pkt_len=%u, nb_segs=%u:\n",
1039                                 fs->rx_port, m, m->pkt_len, m->nb_segs);
1040                         /* dump rx parsed packet info */
1041                         rte_get_rx_ol_flag_list(rx_ol_flags, buf, sizeof(buf));
1042                         printf("rx: l2_len=%d ethertype=%x l3_len=%d "
1043                                 "l4_proto=%d l4_len=%d flags=%s\n",
1044                                 info.l2_len, rte_be_to_cpu_16(info.ethertype),
1045                                 info.l3_len, info.l4_proto, info.l4_len, buf);
1046                         if (rx_ol_flags & RTE_MBUF_F_RX_LRO)
1047                                 printf("rx: m->lro_segsz=%u\n", m->tso_segsz);
1048                         if (info.is_tunnel == 1)
1049                                 printf("rx: outer_l2_len=%d outer_ethertype=%x "
1050                                         "outer_l3_len=%d\n", info.outer_l2_len,
1051                                         rte_be_to_cpu_16(info.outer_ethertype),
1052                                         info.outer_l3_len);
1053                         /* dump tx packet info */
1054                         if ((tx_offloads & (RTE_ETH_TX_OFFLOAD_IPV4_CKSUM |
1055                                             RTE_ETH_TX_OFFLOAD_UDP_CKSUM |
1056                                             RTE_ETH_TX_OFFLOAD_TCP_CKSUM |
1057                                             RTE_ETH_TX_OFFLOAD_SCTP_CKSUM)) ||
1058                                 info.tso_segsz != 0)
1059                                 printf("tx: m->l2_len=%d m->l3_len=%d "
1060                                         "m->l4_len=%d\n",
1061                                         m->l2_len, m->l3_len, m->l4_len);
1062                         if (info.is_tunnel == 1) {
1063                                 if ((tx_offloads &
1064                                     RTE_ETH_TX_OFFLOAD_OUTER_IPV4_CKSUM) ||
1065                                     (tx_offloads &
1066                                     RTE_ETH_TX_OFFLOAD_OUTER_UDP_CKSUM) ||
1067                                     (tx_ol_flags & RTE_MBUF_F_TX_OUTER_IPV6))
1068                                         printf("tx: m->outer_l2_len=%d "
1069                                                 "m->outer_l3_len=%d\n",
1070                                                 m->outer_l2_len,
1071                                                 m->outer_l3_len);
1072                                 if (info.tunnel_tso_segsz != 0 &&
1073                                                 (m->ol_flags & RTE_MBUF_F_TX_TCP_SEG))
1074                                         printf("tx: m->tso_segsz=%d\n",
1075                                                 m->tso_segsz);
1076                         } else if (info.tso_segsz != 0 &&
1077                                         (m->ol_flags & RTE_MBUF_F_TX_TCP_SEG))
1078                                 printf("tx: m->tso_segsz=%d\n", m->tso_segsz);
1079                         rte_get_tx_ol_flag_list(m->ol_flags, buf, sizeof(buf));
1080                         printf("tx: flags=%s", buf);
1081                         printf("\n");
1082                 }
1083         }
1084
1085 #ifdef RTE_LIB_GRO
1086         if (unlikely(gro_enable)) {
1087                 if (gro_flush_cycles == GRO_DEFAULT_FLUSH_CYCLES) {
1088                         nb_rx = rte_gro_reassemble_burst(pkts_burst, nb_rx,
1089                                         &(gro_ports[fs->rx_port].param));
1090                 } else {
1091                         gro_ctx = current_fwd_lcore()->gro_ctx;
1092                         nb_rx = rte_gro_reassemble(pkts_burst, nb_rx, gro_ctx);
1093
1094                         if (++fs->gro_times >= gro_flush_cycles) {
1095                                 gro_pkts_num = rte_gro_get_pkt_count(gro_ctx);
1096                                 if (gro_pkts_num > MAX_PKT_BURST - nb_rx)
1097                                         gro_pkts_num = MAX_PKT_BURST - nb_rx;
1098
1099                                 nb_rx += rte_gro_timeout_flush(gro_ctx, 0,
1100                                                 RTE_GRO_TCP_IPV4,
1101                                                 &pkts_burst[nb_rx],
1102                                                 gro_pkts_num);
1103                                 fs->gro_times = 0;
1104                         }
1105                 }
1106         }
1107 #endif
1108
1109 #ifdef RTE_LIB_GSO
1110         if (gso_ports[fs->tx_port].enable != 0) {
1111                 uint16_t nb_segments = 0;
1112
1113                 gso_ctx = &(current_fwd_lcore()->gso_ctx);
1114                 gso_ctx->gso_size = gso_max_segment_size;
1115                 for (i = 0; i < nb_rx; i++) {
1116                         int ret;
1117
1118                         ret = rte_gso_segment(pkts_burst[i], gso_ctx,
1119                                         &gso_segments[nb_segments],
1120                                         GSO_MAX_PKT_BURST - nb_segments);
1121                         if (ret >= 1) {
1122                                 /* pkts_burst[i] can be freed safely here. */
1123                                 rte_pktmbuf_free(pkts_burst[i]);
1124                                 nb_segments += ret;
1125                         } else if (ret == 0) {
1126                                 /* 0 means it can be transmitted directly
1127                                  * without gso.
1128                                  */
1129                                 gso_segments[nb_segments] = pkts_burst[i];
1130                                 nb_segments += 1;
1131                         } else {
1132                                 TESTPMD_LOG(DEBUG, "Unable to segment packet");
1133                                 rte_pktmbuf_free(pkts_burst[i]);
1134                         }
1135                 }
1136
1137                 tx_pkts_burst = gso_segments;
1138                 nb_rx = nb_segments;
1139         } else
1140 #endif
1141                 tx_pkts_burst = pkts_burst;
1142
1143         nb_prep = rte_eth_tx_prepare(fs->tx_port, fs->tx_queue,
1144                         tx_pkts_burst, nb_rx);
1145         if (nb_prep != nb_rx)
1146                 fprintf(stderr,
1147                         "Preparing packet burst to transmit failed: %s\n",
1148                         rte_strerror(rte_errno));
1149
1150         nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, tx_pkts_burst,
1151                         nb_prep);
1152
1153         /*
1154          * Retry if necessary
1155          */
1156         if (unlikely(nb_tx < nb_rx) && fs->retry_enabled) {
1157                 retry = 0;
1158                 while (nb_tx < nb_rx && retry++ < burst_tx_retry_num) {
1159                         rte_delay_us(burst_tx_delay_time);
1160                         nb_tx += rte_eth_tx_burst(fs->tx_port, fs->tx_queue,
1161                                         &tx_pkts_burst[nb_tx], nb_rx - nb_tx);
1162                 }
1163         }
1164         fs->tx_packets += nb_tx;
1165         fs->rx_bad_ip_csum += rx_bad_ip_csum;
1166         fs->rx_bad_l4_csum += rx_bad_l4_csum;
1167         fs->rx_bad_outer_l4_csum += rx_bad_outer_l4_csum;
1168         fs->rx_bad_outer_ip_csum += rx_bad_outer_ip_csum;
1169
1170         inc_tx_burst_stats(fs, nb_tx);
1171         if (unlikely(nb_tx < nb_rx)) {
1172                 fs->fwd_dropped += (nb_rx - nb_tx);
1173                 do {
1174                         rte_pktmbuf_free(tx_pkts_burst[nb_tx]);
1175                 } while (++nb_tx < nb_rx);
1176         }
1177
1178         get_end_cycles(fs, start_tsc);
1179 }
1180
1181 struct fwd_engine csum_fwd_engine = {
1182         .fwd_mode_name  = "csum",
1183         .port_fwd_begin = NULL,
1184         .port_fwd_end   = NULL,
1185         .packet_fwd     = pkt_burst_checksum_forward,
1186 };