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             uint32_t pkt_type)
 263 {
 264         struct rte_ether_hdr *eth_hdr;
 265
 266         /* check udp destination port, RTE_VXLAN_DEFAULT_PORT (4789) is the
 267          * default vxlan port (rfc7348) or that the rx offload flag is set
 268          * (i40e only currently)
 269          */
 270         if (udp_hdr->dst_port != _htons(RTE_VXLAN_DEFAULT_PORT) &&
 271                 RTE_ETH_IS_TUNNEL_PKT(pkt_type) == 0)
 272                 return;
 273
 274         update_tunnel_outer(info);
 275
 276         eth_hdr = (struct rte_ether_hdr *)((char *)udp_hdr +
 277                 sizeof(struct rte_udp_hdr) +
 278                 sizeof(struct rte_vxlan_hdr));
 279
 280         parse_ethernet(eth_hdr, info);
 281         info->l2_len += RTE_ETHER_VXLAN_HLEN; /* add udp + vxlan */
 282 }
 283
 284 /* Parse a vxlan-gpe header */
 285 static void
 286 parse_vxlan_gpe(struct rte_udp_hdr *udp_hdr,
 287             struct testpmd_offload_info *info)
 288 {
 289         struct rte_ether_hdr *eth_hdr;
 290         struct rte_ipv4_hdr *ipv4_hdr;
 291         struct rte_ipv6_hdr *ipv6_hdr;
 292         struct rte_vxlan_gpe_hdr *vxlan_gpe_hdr;
 293         uint8_t vxlan_gpe_len = sizeof(*vxlan_gpe_hdr);
 294
 295         /* Check udp destination port. */
 296         if (udp_hdr->dst_port != _htons(vxlan_gpe_udp_port))
 297                 return;
 298
 299         vxlan_gpe_hdr = (struct rte_vxlan_gpe_hdr *)((char *)udp_hdr +
 300                                 sizeof(struct rte_udp_hdr));
 301
 302         if (!vxlan_gpe_hdr->proto || vxlan_gpe_hdr->proto ==
 303             RTE_VXLAN_GPE_TYPE_IPV4) {
 304                 update_tunnel_outer(info);
 305
 306                 ipv4_hdr = (struct rte_ipv4_hdr *)((char *)vxlan_gpe_hdr +
 307                            vxlan_gpe_len);
 308
 309                 parse_ipv4(ipv4_hdr, info);
 310                 info->ethertype = _htons(RTE_ETHER_TYPE_IPV4);
 311                 info->l2_len = 0;
 312
 313         } else if (vxlan_gpe_hdr->proto == RTE_VXLAN_GPE_TYPE_IPV6) {
 314                 update_tunnel_outer(info);
 315
 316                 ipv6_hdr = (struct rte_ipv6_hdr *)((char *)vxlan_gpe_hdr +
 317                            vxlan_gpe_len);
 318
 319                 info->ethertype = _htons(RTE_ETHER_TYPE_IPV6);
 320                 parse_ipv6(ipv6_hdr, info);
 321                 info->l2_len = 0;
 322
 323         } else if (vxlan_gpe_hdr->proto == RTE_VXLAN_GPE_TYPE_ETH) {
 324                 update_tunnel_outer(info);
 325
 326                 eth_hdr = (struct rte_ether_hdr *)((char *)vxlan_gpe_hdr +
 327                           vxlan_gpe_len);
 328
 329                 parse_ethernet(eth_hdr, info);
 330         } else
 331                 return;
 332
 333         info->l2_len += RTE_ETHER_VXLAN_GPE_HLEN;
 334 }
 335
 336 /* Parse a geneve header */
 337 static void
 338 parse_geneve(struct rte_udp_hdr *udp_hdr,
 339             struct testpmd_offload_info *info)
 340 {
 341         struct rte_ether_hdr *eth_hdr;
 342         struct rte_ipv4_hdr *ipv4_hdr;
 343         struct rte_ipv6_hdr *ipv6_hdr;
 344         struct rte_geneve_hdr *geneve_hdr;
 345         uint16_t geneve_len;
 346
 347         /* Check udp destination port. */
 348         if (udp_hdr->dst_port != _htons(geneve_udp_port))
 349                 return;
 350
 351         geneve_hdr = (struct rte_geneve_hdr *)((char *)udp_hdr +
 352                                 sizeof(struct rte_udp_hdr));
 353         geneve_len = sizeof(struct rte_geneve_hdr) + geneve_hdr->opt_len * 4;
 354         if (!geneve_hdr->proto || geneve_hdr->proto ==
 355             _htons(RTE_ETHER_TYPE_IPV4)) {
 356                 update_tunnel_outer(info);
 357                 ipv4_hdr = (struct rte_ipv4_hdr *)((char *)geneve_hdr +
 358                            geneve_len);
 359                 parse_ipv4(ipv4_hdr, info);
 360                 info->ethertype = _htons(RTE_ETHER_TYPE_IPV4);
 361                 info->l2_len = 0;
 362         } else if (geneve_hdr->proto == _htons(RTE_ETHER_TYPE_IPV6)) {
 363                 update_tunnel_outer(info);
 364                 ipv6_hdr = (struct rte_ipv6_hdr *)((char *)geneve_hdr +
 365                            geneve_len);
 366                 info->ethertype = _htons(RTE_ETHER_TYPE_IPV6);
 367                 parse_ipv6(ipv6_hdr, info);
 368                 info->l2_len = 0;
 369
 370         } else if (geneve_hdr->proto == _htons(RTE_GENEVE_TYPE_ETH)) {
 371                 update_tunnel_outer(info);
 372                 eth_hdr = (struct rte_ether_hdr *)((char *)geneve_hdr +
 373                           geneve_len);
 374                 parse_ethernet(eth_hdr, info);
 375         } else
 376                 return;
 377
 378         info->l2_len +=
 379                 (sizeof(struct rte_udp_hdr) + sizeof(struct rte_geneve_hdr) +
 380                 ((struct rte_geneve_hdr *)geneve_hdr)->opt_len * 4);
 381 }
 382
 383 /* Parse a gre header */
 384 static void
 385 parse_gre(struct simple_gre_hdr *gre_hdr, struct testpmd_offload_info *info)
 386 {
 387         struct rte_ether_hdr *eth_hdr;
 388         struct rte_ipv4_hdr *ipv4_hdr;
 389         struct rte_ipv6_hdr *ipv6_hdr;
 390         uint8_t gre_len = 0;
 391
 392         gre_len += sizeof(struct simple_gre_hdr);
 393
 394         if (gre_hdr->flags & _htons(GRE_KEY_PRESENT))
 395                 gre_len += GRE_EXT_LEN;
 396         if (gre_hdr->flags & _htons(GRE_SEQUENCE_PRESENT))
 397                 gre_len += GRE_EXT_LEN;
 398         if (gre_hdr->flags & _htons(GRE_CHECKSUM_PRESENT))
 399                 gre_len += GRE_EXT_LEN;
 400
 401         if (gre_hdr->proto == _htons(RTE_ETHER_TYPE_IPV4)) {
 402                 update_tunnel_outer(info);
 403
 404                 ipv4_hdr = (struct rte_ipv4_hdr *)((char *)gre_hdr + gre_len);
 405
 406                 parse_ipv4(ipv4_hdr, info);
 407                 info->ethertype = _htons(RTE_ETHER_TYPE_IPV4);
 408                 info->l2_len = 0;
 409
 410         } else if (gre_hdr->proto == _htons(RTE_ETHER_TYPE_IPV6)) {
 411                 update_tunnel_outer(info);
 412
 413                 ipv6_hdr = (struct rte_ipv6_hdr *)((char *)gre_hdr + gre_len);
 414
 415                 info->ethertype = _htons(RTE_ETHER_TYPE_IPV6);
 416                 parse_ipv6(ipv6_hdr, info);
 417                 info->l2_len = 0;
 418
 419         } else if (gre_hdr->proto == _htons(RTE_ETHER_TYPE_TEB)) {
 420                 update_tunnel_outer(info);
 421
 422                 eth_hdr = (struct rte_ether_hdr *)((char *)gre_hdr + gre_len);
 423
 424                 parse_ethernet(eth_hdr, info);
 425         } else
 426                 return;
 427
 428         info->l2_len += gre_len;
 429 }
 430
 431
 432 /* Parse an encapsulated ip or ipv6 header */
 433 static void
 434 parse_encap_ip(void *encap_ip, struct testpmd_offload_info *info)
 435 {
 436         struct rte_ipv4_hdr *ipv4_hdr = encap_ip;
 437         struct rte_ipv6_hdr *ipv6_hdr = encap_ip;
 438         uint8_t ip_version;
 439
 440         ip_version = (ipv4_hdr->version_ihl & 0xf0) >> 4;
 441
 442         if (ip_version != 4 && ip_version != 6)
 443                 return;
 444
 445         info->is_tunnel = 1;
 446         info->outer_ethertype = info->ethertype;
 447         info->outer_l2_len = info->l2_len;
 448         info->outer_l3_len = info->l3_len;
 449
 450         if (ip_version == 4) {
 451                 parse_ipv4(ipv4_hdr, info);
 452                 info->ethertype = _htons(RTE_ETHER_TYPE_IPV4);
 453         } else {
 454                 parse_ipv6(ipv6_hdr, info);
 455                 info->ethertype = _htons(RTE_ETHER_TYPE_IPV6);
 456         }
 457         info->l2_len = 0;
 458 }
 459
 460 /* if possible, calculate the checksum of a packet in hw or sw,
 461  * depending on the testpmd command line configuration */
 462 static uint64_t
 463 process_inner_cksums(void *l3_hdr, const struct testpmd_offload_info *info,
 464         uint64_t tx_offloads, struct rte_mbuf *m)
 465 {
 466         struct rte_ipv4_hdr *ipv4_hdr = l3_hdr;
 467         struct rte_udp_hdr *udp_hdr;
 468         struct rte_tcp_hdr *tcp_hdr;
 469         struct rte_sctp_hdr *sctp_hdr;
 470         uint64_t ol_flags = 0;
 471         uint32_t max_pkt_len, tso_segsz = 0;
 472         uint16_t l4_off;
 473
 474         /* ensure packet is large enough to require tso */
 475         if (!info->is_tunnel) {
 476                 max_pkt_len = info->l2_len + info->l3_len + info->l4_len +
 477                         info->tso_segsz;
 478                 if (info->tso_segsz != 0 && info->pkt_len > max_pkt_len)
 479                         tso_segsz = info->tso_segsz;
 480         } else {
 481                 max_pkt_len = info->outer_l2_len + info->outer_l3_len +
 482                         info->l2_len + info->l3_len + info->l4_len +
 483                         info->tunnel_tso_segsz;
 484                 if (info->tunnel_tso_segsz != 0 && info->pkt_len > max_pkt_len)
 485                         tso_segsz = info->tunnel_tso_segsz;
 486         }
 487
 488         if (info->ethertype == _htons(RTE_ETHER_TYPE_IPV4)) {
 489                 ipv4_hdr = l3_hdr;
 490
 491                 ol_flags |= RTE_MBUF_F_TX_IPV4;
 492                 if (info->l4_proto == IPPROTO_TCP && tso_segsz) {
 493                         ol_flags |= RTE_MBUF_F_TX_IP_CKSUM;
 494                 } else {
 495                         if (tx_offloads & RTE_ETH_TX_OFFLOAD_IPV4_CKSUM) {
 496                                 ol_flags |= RTE_MBUF_F_TX_IP_CKSUM;
 497                         } else {
 498                                 ipv4_hdr->hdr_checksum = 0;
 499                                 ipv4_hdr->hdr_checksum =
 500                                         rte_ipv4_cksum(ipv4_hdr);
 501                         }
 502                 }
 503         } else if (info->ethertype == _htons(RTE_ETHER_TYPE_IPV6))
 504                 ol_flags |= RTE_MBUF_F_TX_IPV6;
 505         else
 506                 return 0; /* packet type not supported, nothing to do */
 507
 508         if (info->l4_proto == IPPROTO_UDP) {
 509                 udp_hdr = (struct rte_udp_hdr *)((char *)l3_hdr + info->l3_len);
 510                 /* do not recalculate udp cksum if it was 0 */
 511                 if (udp_hdr->dgram_cksum != 0) {
 512                         if (tx_offloads & RTE_ETH_TX_OFFLOAD_UDP_CKSUM) {
 513                                 ol_flags |= RTE_MBUF_F_TX_UDP_CKSUM;
 514                         } else {
 515                                 if (info->is_tunnel)
 516                                         l4_off = info->l2_len +
 517                                                  info->outer_l3_len +
 518                                                  info->l2_len + info->l3_len;
 519                                 else
 520                                         l4_off = info->l2_len + info->l3_len;
 521                                 udp_hdr->dgram_cksum = 0;
 522                                 udp_hdr->dgram_cksum =
 523                                         get_udptcp_checksum(m, l3_hdr, l4_off,
 524                                                 info->ethertype);
 525                         }
 526                 }
 527 #ifdef RTE_LIB_GSO
 528                 if (info->gso_enable)
 529                         ol_flags |= RTE_MBUF_F_TX_UDP_SEG;
 530 #endif
 531         } else if (info->l4_proto == IPPROTO_TCP) {
 532                 tcp_hdr = (struct rte_tcp_hdr *)((char *)l3_hdr + info->l3_len);
 533                 if (tso_segsz)
 534                         ol_flags |= RTE_MBUF_F_TX_TCP_SEG;
 535                 else if (tx_offloads & RTE_ETH_TX_OFFLOAD_TCP_CKSUM) {
 536                         ol_flags |= RTE_MBUF_F_TX_TCP_CKSUM;
 537                 } else {
 538                         if (info->is_tunnel)
 539                                 l4_off = info->l2_len + info->outer_l3_len +
 540                                          info->l2_len + info->l3_len;
 541                         else
 542                                 l4_off = info->l2_len + info->l3_len;
 543                         tcp_hdr->cksum = 0;
 544                         tcp_hdr->cksum =
 545                                 get_udptcp_checksum(m, l3_hdr, l4_off,
 546                                         info->ethertype);
 547                 }
 548 #ifdef RTE_LIB_GSO
 549                 if (info->gso_enable)
 550                         ol_flags |= RTE_MBUF_F_TX_TCP_SEG;
 551 #endif
 552         } else if (info->l4_proto == IPPROTO_SCTP) {
 553                 sctp_hdr = (struct rte_sctp_hdr *)
 554                         ((char *)l3_hdr + info->l3_len);
 555                 /* sctp payload must be a multiple of 4 to be
 556                  * offloaded */
 557                 if ((tx_offloads & RTE_ETH_TX_OFFLOAD_SCTP_CKSUM) &&
 558                         ((ipv4_hdr->total_length & 0x3) == 0)) {
 559                         ol_flags |= RTE_MBUF_F_TX_SCTP_CKSUM;
 560                 } else {
 561                         sctp_hdr->cksum = 0;
 562                         /* XXX implement CRC32c, example available in
 563                          * RFC3309 */
 564                 }
 565         }
 566
 567         return ol_flags;
 568 }
 569
 570 /* Calculate the checksum of outer header */
 571 static uint64_t
 572 process_outer_cksums(void *outer_l3_hdr, struct testpmd_offload_info *info,
 573         uint64_t tx_offloads, int tso_enabled, struct rte_mbuf *m)
 574 {
 575         struct rte_ipv4_hdr *ipv4_hdr = outer_l3_hdr;
 576         struct rte_ipv6_hdr *ipv6_hdr = outer_l3_hdr;
 577         struct rte_udp_hdr *udp_hdr;
 578         uint64_t ol_flags = 0;
 579
 580         if (info->outer_ethertype == _htons(RTE_ETHER_TYPE_IPV4)) {
 581                 ipv4_hdr->hdr_checksum = 0;
 582                 ol_flags |= RTE_MBUF_F_TX_OUTER_IPV4;
 583
 584                 if (tx_offloads & RTE_ETH_TX_OFFLOAD_OUTER_IPV4_CKSUM)
 585                         ol_flags |= RTE_MBUF_F_TX_OUTER_IP_CKSUM;
 586                 else
 587                         ipv4_hdr->hdr_checksum = rte_ipv4_cksum(ipv4_hdr);
 588         } else
 589                 ol_flags |= RTE_MBUF_F_TX_OUTER_IPV6;
 590
 591         if (info->outer_l4_proto != IPPROTO_UDP)
 592                 return ol_flags;
 593
 594         udp_hdr = (struct rte_udp_hdr *)
 595                 ((char *)outer_l3_hdr + info->outer_l3_len);
 596
 597         if (tso_enabled)
 598                 ol_flags |= RTE_MBUF_F_TX_TCP_SEG;
 599
 600         /* Skip SW outer UDP checksum generation if HW supports it */
 601         if (tx_offloads & RTE_ETH_TX_OFFLOAD_OUTER_UDP_CKSUM) {
 602                 if (info->outer_ethertype == _htons(RTE_ETHER_TYPE_IPV4))
 603                         udp_hdr->dgram_cksum
 604                                 = rte_ipv4_phdr_cksum(ipv4_hdr, ol_flags);
 605                 else
 606                         udp_hdr->dgram_cksum
 607                                 = rte_ipv6_phdr_cksum(ipv6_hdr, ol_flags);
 608
 609                 ol_flags |= RTE_MBUF_F_TX_OUTER_UDP_CKSUM;
 610                 return ol_flags;
 611         }
 612
 613         /* outer UDP checksum is done in software. In the other side, for
 614          * UDP tunneling, like VXLAN or Geneve, outer UDP checksum can be
 615          * set to zero.
 616          *
 617          * If a packet will be TSOed into small packets by NIC, we cannot
 618          * set/calculate a non-zero checksum, because it will be a wrong
 619          * value after the packet be split into several small packets.
 620          */
 621         if (tso_enabled)
 622                 udp_hdr->dgram_cksum = 0;
 623
 624         /* do not recalculate udp cksum if it was 0 */
 625         if (udp_hdr->dgram_cksum != 0) {
 626                 udp_hdr->dgram_cksum = 0;
 627                 udp_hdr->dgram_cksum = get_udptcp_checksum(m, outer_l3_hdr,
 628                                         info->l2_len + info->outer_l3_len,
 629                                         info->outer_ethertype);
 630         }
 631
 632         return ol_flags;
 633 }
 634
 635 /*
 636  * Helper function.
 637  * Performs actual copying.
 638  * Returns number of segments in the destination mbuf on success,
 639  * or negative error code on failure.
 640  */
 641 static int
 642 mbuf_copy_split(const struct rte_mbuf *ms, struct rte_mbuf *md[],
 643         uint16_t seglen[], uint8_t nb_seg)
 644 {
 645         uint32_t dlen, slen, tlen;
 646         uint32_t i, len;
 647         const struct rte_mbuf *m;
 648         const uint8_t *src;
 649         uint8_t *dst;
 650
 651         dlen = 0;
 652         slen = 0;
 653         tlen = 0;
 654
 655         dst = NULL;
 656         src = NULL;
 657
 658         m = ms;
 659         i = 0;
 660         while (ms != NULL && i != nb_seg) {
 661
 662                 if (slen == 0) {
 663                         slen = rte_pktmbuf_data_len(ms);
 664                         src = rte_pktmbuf_mtod(ms, const uint8_t *);
 665                 }
 666
 667                 if (dlen == 0) {
 668                         dlen = RTE_MIN(seglen[i], slen);
 669                         md[i]->data_len = dlen;
 670                         md[i]->next = (i + 1 == nb_seg) ? NULL : md[i + 1];
 671                         dst = rte_pktmbuf_mtod(md[i], uint8_t *);
 672                 }
 673
 674                 len = RTE_MIN(slen, dlen);
 675                 memcpy(dst, src, len);
 676                 tlen += len;
 677                 slen -= len;
 678                 dlen -= len;
 679                 src += len;
 680                 dst += len;
 681
 682                 if (slen == 0)
 683                         ms = ms->next;
 684                 if (dlen == 0)
 685                         i++;
 686         }
 687
 688         if (ms != NULL)
 689                 return -ENOBUFS;
 690         else if (tlen != m->pkt_len)
 691                 return -EINVAL;
 692
 693         md[0]->nb_segs = nb_seg;
 694         md[0]->pkt_len = tlen;
 695         md[0]->vlan_tci = m->vlan_tci;
 696         md[0]->vlan_tci_outer = m->vlan_tci_outer;
 697         md[0]->ol_flags = m->ol_flags;
 698         md[0]->tx_offload = m->tx_offload;
 699
 700         return nb_seg;
 701 }
 702
 703 /*
 704  * Allocate a new mbuf with up to tx_pkt_nb_segs segments.
 705  * Copy packet contents and offload information into the new segmented mbuf.
 706  */
 707 static struct rte_mbuf *
 708 pkt_copy_split(const struct rte_mbuf *pkt)
 709 {
 710         int32_t n, rc;
 711         uint32_t i, len, nb_seg;
 712         struct rte_mempool *mp;
 713         uint16_t seglen[RTE_MAX_SEGS_PER_PKT];
 714         struct rte_mbuf *p, *md[RTE_MAX_SEGS_PER_PKT];
 715
 716         mp = current_fwd_lcore()->mbp;
 717
 718         if (tx_pkt_split == TX_PKT_SPLIT_RND)
 719                 nb_seg = rte_rand() % tx_pkt_nb_segs + 1;
 720         else
 721                 nb_seg = tx_pkt_nb_segs;
 722
 723         memcpy(seglen, tx_pkt_seg_lengths, nb_seg * sizeof(seglen[0]));
 724
 725         /* calculate number of segments to use and their length. */
 726         len = 0;
 727         for (i = 0; i != nb_seg && len < pkt->pkt_len; i++) {
 728                 len += seglen[i];
 729                 md[i] = NULL;
 730         }
 731
 732         n = pkt->pkt_len - len;
 733
 734         /* update size of the last segment to fit rest of the packet */
 735         if (n >= 0) {
 736                 seglen[i - 1] += n;
 737                 len += n;
 738         }
 739
 740         nb_seg = i;
 741         while (i != 0) {
 742                 p = rte_pktmbuf_alloc(mp);
 743                 if (p == NULL) {
 744                         TESTPMD_LOG(ERR,
 745                                 "failed to allocate %u-th of %u mbuf "
 746                                 "from mempool: %s\n",
 747                                 nb_seg - i, nb_seg, mp->name);
 748                         break;
 749                 }
 750
 751                 md[--i] = p;
 752                 if (rte_pktmbuf_tailroom(md[i]) < seglen[i]) {
 753                         TESTPMD_LOG(ERR, "mempool %s, %u-th segment: "
 754                                 "expected seglen: %u, "
 755                                 "actual mbuf tailroom: %u\n",
 756                                 mp->name, i, seglen[i],
 757                                 rte_pktmbuf_tailroom(md[i]));
 758                         break;
 759                 }
 760         }
 761
 762         /* all mbufs successfully allocated, do copy */
 763         if (i == 0) {
 764                 rc = mbuf_copy_split(pkt, md, seglen, nb_seg);
 765                 if (rc < 0)
 766                         TESTPMD_LOG(ERR,
 767                                 "mbuf_copy_split for %p(len=%u, nb_seg=%u) "
 768                                 "into %u segments failed with error code: %d\n",
 769                                 pkt, pkt->pkt_len, pkt->nb_segs, nb_seg, rc);
 770
 771                 /* figure out how many mbufs to free. */
 772                 i = RTE_MAX(rc, 0);
 773         }
 774
 775         /* free unused mbufs */
 776         for (; i != nb_seg; i++) {
 777                 rte_pktmbuf_free_seg(md[i]);
 778                 md[i] = NULL;
 779         }
 780
 781         return md[0];
 782 }
 783
 784 /*
 785  * Receive a burst of packets, and for each packet:
 786  *  - parse packet, and try to recognize a supported packet type (1)
 787  *  - if it's not a supported packet type, don't touch the packet, else:
 788  *  - reprocess the checksum of all supported layers. This is done in SW
 789  *    or HW, depending on testpmd command line configuration
 790  *  - if TSO is enabled in testpmd command line, also flag the mbuf for TCP
 791  *    segmentation offload (this implies HW TCP checksum)
 792  * Then transmit packets on the output port.
 793  *
 794  * (1) Supported packets are:
 795  *   Ether / (vlan) / IP|IP6 / UDP|TCP|SCTP .
 796  *   Ether / (vlan) / outer IP|IP6 / outer UDP / VxLAN / Ether / IP|IP6 /
 797  *           UDP|TCP|SCTP
 798  *   Ether / (vlan) / outer IP|IP6 / outer UDP / VXLAN-GPE / Ether / IP|IP6 /
 799  *           UDP|TCP|SCTP
 800  *   Ether / (vlan) / outer IP|IP6 / outer UDP / VXLAN-GPE / IP|IP6 /
 801  *           UDP|TCP|SCTP
 802  *   Ether / (vlan) / outer IP / outer UDP / GTP / IP|IP6 / UDP|TCP|SCTP
 803  *   Ether / (vlan) / outer IP|IP6 / GRE / Ether / IP|IP6 / UDP|TCP|SCTP
 804  *   Ether / (vlan) / outer IP|IP6 / GRE / IP|IP6 / UDP|TCP|SCTP
 805  *   Ether / (vlan) / outer IP|IP6 / IP|IP6 / UDP|TCP|SCTP
 806  *
 807  * The testpmd command line for this forward engine sets the flags
 808  * TESTPMD_TX_OFFLOAD_* in ports[tx_port].tx_ol_flags. They control
 809  * whether a checksum must be calculated in software or in hardware. The
 810  * IP, UDP, TCP and SCTP flags always concern the inner layer. The
 811  * OUTER_IP is only useful for tunnel packets.
 812  */
 813 static void
 814 pkt_burst_checksum_forward(struct fwd_stream *fs)
 815 {
 816         struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
 817 #ifdef RTE_LIB_GSO
 818         struct rte_mbuf *gso_segments[GSO_MAX_PKT_BURST];
 819         struct rte_gso_ctx *gso_ctx;
 820 #endif
 821         struct rte_mbuf **tx_pkts_burst;
 822         struct rte_port *txp;
 823         struct rte_mbuf *m, *p;
 824         struct rte_ether_hdr *eth_hdr;
 825         void *l3_hdr = NULL, *outer_l3_hdr = NULL; /* can be IPv4 or IPv6 */
 826 #ifdef RTE_LIB_GRO
 827         void **gro_ctx;
 828         uint16_t gro_pkts_num;
 829         uint8_t gro_enable;
 830 #endif
 831         uint16_t nb_rx;
 832         uint16_t nb_tx;
 833         uint16_t nb_prep;
 834         uint16_t i;
 835         uint64_t rx_ol_flags, tx_ol_flags;
 836         uint64_t tx_offloads;
 837         uint32_t retry;
 838         uint32_t rx_bad_ip_csum;
 839         uint32_t rx_bad_l4_csum;
 840         uint32_t rx_bad_outer_l4_csum;
 841         uint32_t rx_bad_outer_ip_csum;
 842         struct testpmd_offload_info info;
 843
 844         uint64_t start_tsc = 0;
 845
 846         get_start_cycles(&start_tsc);
 847
 848         /* receive a burst of packet */
 849         nb_rx = rte_eth_rx_burst(fs->rx_port, fs->rx_queue, pkts_burst,
 850                                  nb_pkt_per_burst);
 851         inc_rx_burst_stats(fs, nb_rx);
 852         if (unlikely(nb_rx == 0))
 853                 return;
 854
 855         fs->rx_packets += nb_rx;
 856         rx_bad_ip_csum = 0;
 857         rx_bad_l4_csum = 0;
 858         rx_bad_outer_l4_csum = 0;
 859         rx_bad_outer_ip_csum = 0;
 860 #ifdef RTE_LIB_GRO
 861         gro_enable = gro_ports[fs->rx_port].enable;
 862 #endif
 863
 864         txp = &ports[fs->tx_port];
 865         tx_offloads = txp->dev_conf.txmode.offloads;
 866         memset(&info, 0, sizeof(info));
 867         info.tso_segsz = txp->tso_segsz;
 868         info.tunnel_tso_segsz = txp->tunnel_tso_segsz;
 869 #ifdef RTE_LIB_GSO
 870         if (gso_ports[fs->tx_port].enable)
 871                 info.gso_enable = 1;
 872 #endif
 873
 874         for (i = 0; i < nb_rx; i++) {
 875                 if (likely(i < nb_rx - 1))
 876                         rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[i + 1],
 877                                                        void *));
 878
 879                 m = pkts_burst[i];
 880                 info.is_tunnel = 0;
 881                 info.pkt_len = rte_pktmbuf_pkt_len(m);
 882                 tx_ol_flags = m->ol_flags &
 883                               (RTE_MBUF_F_INDIRECT | RTE_MBUF_F_EXTERNAL);
 884                 rx_ol_flags = m->ol_flags;
 885
 886                 /* Update the L3/L4 checksum error packet statistics */
 887                 if ((rx_ol_flags & RTE_MBUF_F_RX_IP_CKSUM_MASK) == RTE_MBUF_F_RX_IP_CKSUM_BAD)
 888                         rx_bad_ip_csum += 1;
 889                 if ((rx_ol_flags & RTE_MBUF_F_RX_L4_CKSUM_MASK) == RTE_MBUF_F_RX_L4_CKSUM_BAD)
 890                         rx_bad_l4_csum += 1;
 891                 if (rx_ol_flags & RTE_MBUF_F_RX_OUTER_L4_CKSUM_BAD)
 892                         rx_bad_outer_l4_csum += 1;
 893                 if (rx_ol_flags & RTE_MBUF_F_RX_OUTER_IP_CKSUM_BAD)
 894                         rx_bad_outer_ip_csum += 1;
 895
 896                 /* step 1: dissect packet, parsing optional vlan, ip4/ip6, vxlan
 897                  * and inner headers */
 898
 899                 eth_hdr = rte_pktmbuf_mtod(m, struct rte_ether_hdr *);
 900                 rte_ether_addr_copy(&peer_eth_addrs[fs->peer_addr],
 901                                 &eth_hdr->dst_addr);
 902                 rte_ether_addr_copy(&ports[fs->tx_port].eth_addr,
 903                                 &eth_hdr->src_addr);
 904                 parse_ethernet(eth_hdr, &info);
 905                 l3_hdr = (char *)eth_hdr + info.l2_len;
 906
 907                 /* check if it's a supported tunnel */
 908                 if (txp->parse_tunnel) {
 909                         if (info.l4_proto == IPPROTO_UDP) {
 910                                 struct rte_udp_hdr *udp_hdr;
 911
 912                                 udp_hdr = (struct rte_udp_hdr *)
 913                                         ((char *)l3_hdr + info.l3_len);
 914                                 parse_gtp(udp_hdr, &info);
 915                                 if (info.is_tunnel) {
 916                                         tx_ol_flags |= RTE_MBUF_F_TX_TUNNEL_GTP;
 917                                         goto tunnel_update;
 918                                 }
 919                                 parse_vxlan_gpe(udp_hdr, &info);
 920                                 if (info.is_tunnel) {
 921                                         tx_ol_flags |=
 922                                                 RTE_MBUF_F_TX_TUNNEL_VXLAN_GPE;
 923                                         goto tunnel_update;
 924                                 }
 925                                 parse_vxlan(udp_hdr, &info,
 926                                             m->packet_type);
 927                                 if (info.is_tunnel) {
 928                                         tx_ol_flags |=
 929                                                 RTE_MBUF_F_TX_TUNNEL_VXLAN;
 930                                         goto tunnel_update;
 931                                 }
 932                                 parse_geneve(udp_hdr, &info);
 933                                 if (info.is_tunnel) {
 934                                         tx_ol_flags |=
 935                                                 RTE_MBUF_F_TX_TUNNEL_GENEVE;
 936                                         goto tunnel_update;
 937                                 }
 938                         } else if (info.l4_proto == IPPROTO_GRE) {
 939                                 struct simple_gre_hdr *gre_hdr;
 940
 941                                 gre_hdr = (struct simple_gre_hdr *)
 942                                         ((char *)l3_hdr + info.l3_len);
 943                                 parse_gre(gre_hdr, &info);
 944                                 if (info.is_tunnel)
 945                                         tx_ol_flags |= RTE_MBUF_F_TX_TUNNEL_GRE;
 946                         } else if (info.l4_proto == IPPROTO_IPIP) {
 947                                 void *encap_ip_hdr;
 948
 949                                 encap_ip_hdr = (char *)l3_hdr + info.l3_len;
 950                                 parse_encap_ip(encap_ip_hdr, &info);
 951                                 if (info.is_tunnel)
 952                                         tx_ol_flags |= RTE_MBUF_F_TX_TUNNEL_IPIP;
 953                         }
 954                 }
 955
 956 tunnel_update:
 957                 /* update l3_hdr and outer_l3_hdr if a tunnel was parsed */
 958                 if (info.is_tunnel) {
 959                         outer_l3_hdr = l3_hdr;
 960                         l3_hdr = (char *)l3_hdr + info.outer_l3_len + info.l2_len;
 961                 }
 962
 963                 /* step 2: depending on user command line configuration,
 964                  * recompute checksum either in software or flag the
 965                  * mbuf to offload the calculation to the NIC. If TSO
 966                  * is configured, prepare the mbuf for TCP segmentation. */
 967
 968                 /* process checksums of inner headers first */
 969                 tx_ol_flags |= process_inner_cksums(l3_hdr, &info,
 970                         tx_offloads, m);
 971
 972                 /* Then process outer headers if any. Note that the software
 973                  * checksum will be wrong if one of the inner checksums is
 974                  * processed in hardware. */
 975                 if (info.is_tunnel == 1) {
 976                         tx_ol_flags |= process_outer_cksums(outer_l3_hdr, &info,
 977                                         tx_offloads,
 978                                         !!(tx_ol_flags & RTE_MBUF_F_TX_TCP_SEG),
 979                                         m);
 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                              RTE_ETH_TX_OFFLOAD_OUTER_IPV4_CKSUM) ||
 989                             (tx_offloads &
 990                              RTE_ETH_TX_OFFLOAD_OUTER_UDP_CKSUM)) {
 991                                 m->outer_l2_len = info.outer_l2_len;
 992                                 m->outer_l3_len = info.outer_l3_len;
 993                                 m->l2_len = info.l2_len;
 994                                 m->l3_len = info.l3_len;
 995                                 m->l4_len = info.l4_len;
 996                                 m->tso_segsz = info.tunnel_tso_segsz;
 997                         }
 998                         else {
 999                                 /* if there is a outer UDP cksum
1000                                    processed in sw and the inner in hw,
1001                                    the outer checksum will be wrong as
1002                                    the payload will be modified by the
1003                                    hardware */
1004                                 m->l2_len = info.outer_l2_len +
1005                                         info.outer_l3_len + info.l2_len;
1006                                 m->l3_len = info.l3_len;
1007                                 m->l4_len = info.l4_len;
1008                         }
1009                 } else {
1010                         /* this is only useful if an offload flag is
1011                          * set, but it does not hurt to fill it in any
1012                          * case */
1013                         m->l2_len = info.l2_len;
1014                         m->l3_len = info.l3_len;
1015                         m->l4_len = info.l4_len;
1016                         m->tso_segsz = info.tso_segsz;
1017                 }
1018                 m->ol_flags = tx_ol_flags;
1019
1020                 /* Do split & copy for the packet. */
1021                 if (tx_pkt_split != TX_PKT_SPLIT_OFF) {
1022                         p = pkt_copy_split(m);
1023                         if (p != NULL) {
1024                                 rte_pktmbuf_free(m);
1025                                 m = p;
1026                                 pkts_burst[i] = m;
1027                         }
1028                 }
1029
1030                 /* if verbose mode is enabled, dump debug info */
1031                 if (verbose_level > 0) {
1032                         char buf[256];
1033
1034                         printf("-----------------\n");
1035                         printf("port=%u, mbuf=%p, pkt_len=%u, nb_segs=%u:\n",
1036                                 fs->rx_port, m, m->pkt_len, m->nb_segs);
1037                         /* dump rx parsed packet info */
1038                         rte_get_rx_ol_flag_list(rx_ol_flags, buf, sizeof(buf));
1039                         printf("rx: l2_len=%d ethertype=%x l3_len=%d "
1040                                 "l4_proto=%d l4_len=%d flags=%s\n",
1041                                 info.l2_len, rte_be_to_cpu_16(info.ethertype),
1042                                 info.l3_len, info.l4_proto, info.l4_len, buf);
1043                         if (rx_ol_flags & RTE_MBUF_F_RX_LRO)
1044                                 printf("rx: m->lro_segsz=%u\n", m->tso_segsz);
1045                         if (info.is_tunnel == 1)
1046                                 printf("rx: outer_l2_len=%d outer_ethertype=%x "
1047                                         "outer_l3_len=%d\n", info.outer_l2_len,
1048                                         rte_be_to_cpu_16(info.outer_ethertype),
1049                                         info.outer_l3_len);
1050                         /* dump tx packet info */
1051                         if ((tx_offloads & (RTE_ETH_TX_OFFLOAD_IPV4_CKSUM |
1052                                             RTE_ETH_TX_OFFLOAD_UDP_CKSUM |
1053                                             RTE_ETH_TX_OFFLOAD_TCP_CKSUM |
1054                                             RTE_ETH_TX_OFFLOAD_SCTP_CKSUM)) ||
1055                                 info.tso_segsz != 0)
1056                                 printf("tx: m->l2_len=%d m->l3_len=%d "
1057                                         "m->l4_len=%d\n",
1058                                         m->l2_len, m->l3_len, m->l4_len);
1059                         if (info.is_tunnel == 1) {
1060                                 if ((tx_offloads &
1061                                     RTE_ETH_TX_OFFLOAD_OUTER_IPV4_CKSUM) ||
1062                                     (tx_offloads &
1063                                     RTE_ETH_TX_OFFLOAD_OUTER_UDP_CKSUM) ||
1064                                     (tx_ol_flags & RTE_MBUF_F_TX_OUTER_IPV6))
1065                                         printf("tx: m->outer_l2_len=%d "
1066                                                 "m->outer_l3_len=%d\n",
1067                                                 m->outer_l2_len,
1068                                                 m->outer_l3_len);
1069                                 if (info.tunnel_tso_segsz != 0 &&
1070                                                 (m->ol_flags & RTE_MBUF_F_TX_TCP_SEG))
1071                                         printf("tx: m->tso_segsz=%d\n",
1072                                                 m->tso_segsz);
1073                         } else if (info.tso_segsz != 0 &&
1074                                         (m->ol_flags & RTE_MBUF_F_TX_TCP_SEG))
1075                                 printf("tx: m->tso_segsz=%d\n", m->tso_segsz);
1076                         rte_get_tx_ol_flag_list(m->ol_flags, buf, sizeof(buf));
1077                         printf("tx: flags=%s", buf);
1078                         printf("\n");
1079                 }
1080         }
1081
1082 #ifdef RTE_LIB_GRO
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 #endif
1105
1106 #ifdef RTE_LIB_GSO
1107         if (gso_ports[fs->tx_port].enable != 0) {
1108                 uint16_t nb_segments = 0;
1109
1110                 gso_ctx = &(current_fwd_lcore()->gso_ctx);
1111                 gso_ctx->gso_size = gso_max_segment_size;
1112                 for (i = 0; i < nb_rx; i++) {
1113                         int ret;
1114
1115                         ret = rte_gso_segment(pkts_burst[i], gso_ctx,
1116                                         &gso_segments[nb_segments],
1117                                         GSO_MAX_PKT_BURST - nb_segments);
1118                         if (ret >= 1) {
1119                                 /* pkts_burst[i] can be freed safely here. */
1120                                 rte_pktmbuf_free(pkts_burst[i]);
1121                                 nb_segments += ret;
1122                         } else if (ret == 0) {
1123                                 /* 0 means it can be transmitted directly
1124                                  * without gso.
1125                                  */
1126                                 gso_segments[nb_segments] = pkts_burst[i];
1127                                 nb_segments += 1;
1128                         } else {
1129                                 TESTPMD_LOG(DEBUG, "Unable to segment packet");
1130                                 rte_pktmbuf_free(pkts_burst[i]);
1131                         }
1132                 }
1133
1134                 tx_pkts_burst = gso_segments;
1135                 nb_rx = nb_segments;
1136         } else
1137 #endif
1138                 tx_pkts_burst = pkts_burst;
1139
1140         nb_prep = rte_eth_tx_prepare(fs->tx_port, fs->tx_queue,
1141                         tx_pkts_burst, nb_rx);
1142         if (nb_prep != nb_rx)
1143                 fprintf(stderr,
1144                         "Preparing packet burst to transmit failed: %s\n",
1145                         rte_strerror(rte_errno));
1146
1147         nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, tx_pkts_burst,
1148                         nb_prep);
1149
1150         /*
1151          * Retry if necessary
1152          */
1153         if (unlikely(nb_tx < nb_rx) && fs->retry_enabled) {
1154                 retry = 0;
1155                 while (nb_tx < nb_rx && retry++ < burst_tx_retry_num) {
1156                         rte_delay_us(burst_tx_delay_time);
1157                         nb_tx += rte_eth_tx_burst(fs->tx_port, fs->tx_queue,
1158                                         &tx_pkts_burst[nb_tx], nb_rx - nb_tx);
1159                 }
1160         }
1161         fs->tx_packets += nb_tx;
1162         fs->rx_bad_ip_csum += rx_bad_ip_csum;
1163         fs->rx_bad_l4_csum += rx_bad_l4_csum;
1164         fs->rx_bad_outer_l4_csum += rx_bad_outer_l4_csum;
1165         fs->rx_bad_outer_ip_csum += rx_bad_outer_ip_csum;
1166
1167         inc_tx_burst_stats(fs, nb_tx);
1168         if (unlikely(nb_tx < nb_rx)) {
1169                 fs->fwd_dropped += (nb_rx - nb_tx);
1170                 do {
1171                         rte_pktmbuf_free(tx_pkts_burst[nb_tx]);
1172                 } while (++nb_tx < nb_rx);
1173         }
1174
1175         get_end_cycles(fs, start_tsc);
1176 }
1177
1178 struct fwd_engine csum_fwd_engine = {
1179         .fwd_mode_name  = "csum",
1180         .port_fwd_begin = NULL,
1181         .port_fwd_end   = NULL,
1182         .packet_fwd     = pkt_burst_checksum_forward,
1183 };