examples/l3fwd/l3fwd_em.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2010-2016 Intel Corporation. All rights reserved.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of Intel Corporation nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include <stdio.h>
  35 #include <stdlib.h>
  36 #include <stdint.h>
  37 #include <inttypes.h>
  38 #include <sys/types.h>
  39 #include <string.h>
  40 #include <sys/queue.h>
  41 #include <stdarg.h>
  42 #include <errno.h>
  43 #include <getopt.h>
  44 #include <stdbool.h>
  45
  46 #include <rte_debug.h>
  47 #include <rte_ether.h>
  48 #include <rte_ethdev.h>
  49 #include <rte_ring.h>
  50 #include <rte_mempool.h>
  51 #include <rte_cycles.h>
  52 #include <rte_mbuf.h>
  53 #include <rte_ip.h>
  54 #include <rte_tcp.h>
  55 #include <rte_udp.h>
  56 #include <rte_hash.h>
  57
  58 #include "l3fwd.h"
  59
  60 #ifdef RTE_MACHINE_CPUFLAG_SSE4_2
  61 #include <rte_hash_crc.h>
  62 #define DEFAULT_HASH_FUNC       rte_hash_crc
  63 #else
  64 #include <rte_jhash.h>
  65 #define DEFAULT_HASH_FUNC       rte_jhash
  66 #endif /* RTE_MACHINE_CPUFLAG_SSE4_2 */
  67
  68 #define IPV6_ADDR_LEN 16
  69
  70 struct ipv4_5tuple {
  71         uint32_t ip_dst;
  72         uint32_t ip_src;
  73         uint16_t port_dst;
  74         uint16_t port_src;
  75         uint8_t  proto;
  76 } __attribute__((__packed__));
  77
  78 union ipv4_5tuple_host {
  79         struct {
  80                 uint8_t  pad0;
  81                 uint8_t  proto;
  82                 uint16_t pad1;
  83                 uint32_t ip_src;
  84                 uint32_t ip_dst;
  85                 uint16_t port_src;
  86                 uint16_t port_dst;
  87         };
  88         xmm_t xmm;
  89 };
  90
  91 #define XMM_NUM_IN_IPV6_5TUPLE 3
  92
  93 struct ipv6_5tuple {
  94         uint8_t  ip_dst[IPV6_ADDR_LEN];
  95         uint8_t  ip_src[IPV6_ADDR_LEN];
  96         uint16_t port_dst;
  97         uint16_t port_src;
  98         uint8_t  proto;
  99 } __attribute__((__packed__));
 100
 101 union ipv6_5tuple_host {
 102         struct {
 103                 uint16_t pad0;
 104                 uint8_t  proto;
 105                 uint8_t  pad1;
 106                 uint8_t  ip_src[IPV6_ADDR_LEN];
 107                 uint8_t  ip_dst[IPV6_ADDR_LEN];
 108                 uint16_t port_src;
 109                 uint16_t port_dst;
 110                 uint64_t reserve;
 111         };
 112         xmm_t xmm[XMM_NUM_IN_IPV6_5TUPLE];
 113 };
 114
 115
 116
 117 struct ipv4_l3fwd_em_route {
 118         struct ipv4_5tuple key;
 119         uint8_t if_out;
 120 };
 121
 122 struct ipv6_l3fwd_em_route {
 123         struct ipv6_5tuple key;
 124         uint8_t if_out;
 125 };
 126
 127 static struct ipv4_l3fwd_em_route ipv4_l3fwd_em_route_array[] = {
 128         {{IPv4(101, 0, 0, 0), IPv4(100, 10, 0, 1),  101, 11, IPPROTO_TCP}, 0},
 129         {{IPv4(201, 0, 0, 0), IPv4(200, 20, 0, 1),  102, 12, IPPROTO_TCP}, 1},
 130         {{IPv4(111, 0, 0, 0), IPv4(100, 30, 0, 1),  101, 11, IPPROTO_TCP}, 2},
 131         {{IPv4(211, 0, 0, 0), IPv4(200, 40, 0, 1),  102, 12, IPPROTO_TCP}, 3},
 132 };
 133
 134 static struct ipv6_l3fwd_em_route ipv6_l3fwd_em_route_array[] = {
 135         {{
 136         {0xfe, 0x80, 0, 0, 0, 0, 0, 0, 0x02, 0x1e, 0x67, 0xff, 0xfe, 0, 0, 0},
 137         {0xfe, 0x80, 0, 0, 0, 0, 0, 0, 0x02, 0x1b, 0x21, 0xff, 0xfe, 0x91, 0x38, 0x05},
 138         101, 11, IPPROTO_TCP}, 0},
 139
 140         {{
 141         {0xfe, 0x90, 0, 0, 0, 0, 0, 0, 0x02, 0x1e, 0x67, 0xff, 0xfe, 0, 0, 0},
 142         {0xfe, 0x90, 0, 0, 0, 0, 0, 0, 0x02, 0x1b, 0x21, 0xff, 0xfe, 0x91, 0x38, 0x05},
 143         102, 12, IPPROTO_TCP}, 1},
 144
 145         {{
 146         {0xfe, 0xa0, 0, 0, 0, 0, 0, 0, 0x02, 0x1e, 0x67, 0xff, 0xfe, 0, 0, 0},
 147         {0xfe, 0xa0, 0, 0, 0, 0, 0, 0, 0x02, 0x1b, 0x21, 0xff, 0xfe, 0x91, 0x38, 0x05},
 148         101, 11, IPPROTO_TCP}, 2},
 149
 150         {{
 151         {0xfe, 0xb0, 0, 0, 0, 0, 0, 0, 0x02, 0x1e, 0x67, 0xff, 0xfe, 0, 0, 0},
 152         {0xfe, 0xb0, 0, 0, 0, 0, 0, 0, 0x02, 0x1b, 0x21, 0xff, 0xfe, 0x91, 0x38, 0x05},
 153         102, 12, IPPROTO_TCP}, 3},
 154 };
 155
 156 struct rte_hash *ipv4_l3fwd_em_lookup_struct[NB_SOCKETS];
 157 struct rte_hash *ipv6_l3fwd_em_lookup_struct[NB_SOCKETS];
 158
 159 static inline uint32_t
 160 ipv4_hash_crc(const void *data, __rte_unused uint32_t data_len,
 161                 uint32_t init_val)
 162 {
 163         const union ipv4_5tuple_host *k;
 164         uint32_t t;
 165         const uint32_t *p;
 166
 167         k = data;
 168         t = k->proto;
 169         p = (const uint32_t *)&k->port_src;
 170
 171 #ifdef RTE_MACHINE_CPUFLAG_SSE4_2
 172         init_val = rte_hash_crc_4byte(t, init_val);
 173         init_val = rte_hash_crc_4byte(k->ip_src, init_val);
 174         init_val = rte_hash_crc_4byte(k->ip_dst, init_val);
 175         init_val = rte_hash_crc_4byte(*p, init_val);
 176 #else /* RTE_MACHINE_CPUFLAG_SSE4_2 */
 177         init_val = rte_jhash_1word(t, init_val);
 178         init_val = rte_jhash_1word(k->ip_src, init_val);
 179         init_val = rte_jhash_1word(k->ip_dst, init_val);
 180         init_val = rte_jhash_1word(*p, init_val);
 181 #endif /* RTE_MACHINE_CPUFLAG_SSE4_2 */
 182
 183         return init_val;
 184 }
 185
 186 static inline uint32_t
 187 ipv6_hash_crc(const void *data, __rte_unused uint32_t data_len,
 188                 uint32_t init_val)
 189 {
 190         const union ipv6_5tuple_host *k;
 191         uint32_t t;
 192         const uint32_t *p;
 193 #ifdef RTE_MACHINE_CPUFLAG_SSE4_2
 194         const uint32_t  *ip_src0, *ip_src1, *ip_src2, *ip_src3;
 195         const uint32_t  *ip_dst0, *ip_dst1, *ip_dst2, *ip_dst3;
 196 #endif /* RTE_MACHINE_CPUFLAG_SSE4_2 */
 197
 198         k = data;
 199         t = k->proto;
 200         p = (const uint32_t *)&k->port_src;
 201
 202 #ifdef RTE_MACHINE_CPUFLAG_SSE4_2
 203         ip_src0 = (const uint32_t *) k->ip_src;
 204         ip_src1 = (const uint32_t *)(k->ip_src+4);
 205         ip_src2 = (const uint32_t *)(k->ip_src+8);
 206         ip_src3 = (const uint32_t *)(k->ip_src+12);
 207         ip_dst0 = (const uint32_t *) k->ip_dst;
 208         ip_dst1 = (const uint32_t *)(k->ip_dst+4);
 209         ip_dst2 = (const uint32_t *)(k->ip_dst+8);
 210         ip_dst3 = (const uint32_t *)(k->ip_dst+12);
 211         init_val = rte_hash_crc_4byte(t, init_val);
 212         init_val = rte_hash_crc_4byte(*ip_src0, init_val);
 213         init_val = rte_hash_crc_4byte(*ip_src1, init_val);
 214         init_val = rte_hash_crc_4byte(*ip_src2, init_val);
 215         init_val = rte_hash_crc_4byte(*ip_src3, init_val);
 216         init_val = rte_hash_crc_4byte(*ip_dst0, init_val);
 217         init_val = rte_hash_crc_4byte(*ip_dst1, init_val);
 218         init_val = rte_hash_crc_4byte(*ip_dst2, init_val);
 219         init_val = rte_hash_crc_4byte(*ip_dst3, init_val);
 220         init_val = rte_hash_crc_4byte(*p, init_val);
 221 #else /* RTE_MACHINE_CPUFLAG_SSE4_2 */
 222         init_val = rte_jhash_1word(t, init_val);
 223         init_val = rte_jhash(k->ip_src,
 224                         sizeof(uint8_t) * IPV6_ADDR_LEN, init_val);
 225         init_val = rte_jhash(k->ip_dst,
 226                         sizeof(uint8_t) * IPV6_ADDR_LEN, init_val);
 227         init_val = rte_jhash_1word(*p, init_val);
 228 #endif /* RTE_MACHINE_CPUFLAG_SSE4_2 */
 229         return init_val;
 230 }
 231
 232 #define IPV4_L3FWD_EM_NUM_ROUTES \
 233         (sizeof(ipv4_l3fwd_em_route_array) / sizeof(ipv4_l3fwd_em_route_array[0]))
 234
 235 #define IPV6_L3FWD_EM_NUM_ROUTES \
 236         (sizeof(ipv6_l3fwd_em_route_array) / sizeof(ipv6_l3fwd_em_route_array[0]))
 237
 238 static uint8_t ipv4_l3fwd_out_if[L3FWD_HASH_ENTRIES] __rte_cache_aligned;
 239 static uint8_t ipv6_l3fwd_out_if[L3FWD_HASH_ENTRIES] __rte_cache_aligned;
 240
 241 static rte_xmm_t mask0;
 242 static rte_xmm_t mask1;
 243 static rte_xmm_t mask2;
 244
 245 #if defined(__SSE2__)
 246 static inline xmm_t
 247 em_mask_key(void *key, xmm_t mask)
 248 {
 249         __m128i data = _mm_loadu_si128((__m128i *)(key));
 250
 251         return _mm_and_si128(data, mask);
 252 }
 253 #elif defined(RTE_MACHINE_CPUFLAG_NEON)
 254 static inline xmm_t
 255 em_mask_key(void *key, xmm_t mask)
 256 {
 257         int32x4_t data = vld1q_s32((int32_t *)key);
 258
 259         return vandq_s32(data, mask);
 260 }
 261 #endif
 262
 263 static inline uint8_t
 264 em_get_ipv4_dst_port(void *ipv4_hdr, uint8_t portid, void *lookup_struct)
 265 {
 266         int ret = 0;
 267         union ipv4_5tuple_host key;
 268         struct rte_hash *ipv4_l3fwd_lookup_struct =
 269                 (struct rte_hash *)lookup_struct;
 270
 271         ipv4_hdr = (uint8_t *)ipv4_hdr + offsetof(struct ipv4_hdr, time_to_live);
 272
 273         /*
 274          * Get 5 tuple: dst port, src port, dst IP address,
 275          * src IP address and protocol.
 276          */
 277         key.xmm = em_mask_key(ipv4_hdr, mask0.x);
 278
 279         /* Find destination port */
 280         ret = rte_hash_lookup(ipv4_l3fwd_lookup_struct, (const void *)&key);
 281         return (uint8_t)((ret < 0) ? portid : ipv4_l3fwd_out_if[ret]);
 282 }
 283
 284 static inline uint8_t
 285 em_get_ipv6_dst_port(void *ipv6_hdr,  uint8_t portid, void *lookup_struct)
 286 {
 287         int ret = 0;
 288         union ipv6_5tuple_host key;
 289         struct rte_hash *ipv6_l3fwd_lookup_struct =
 290                 (struct rte_hash *)lookup_struct;
 291
 292         ipv6_hdr = (uint8_t *)ipv6_hdr + offsetof(struct ipv6_hdr, payload_len);
 293         void *data0 = ipv6_hdr;
 294         void *data1 = ((uint8_t *)ipv6_hdr) + sizeof(xmm_t);
 295         void *data2 = ((uint8_t *)ipv6_hdr) + sizeof(xmm_t) + sizeof(xmm_t);
 296
 297         /* Get part of 5 tuple: src IP address lower 96 bits and protocol */
 298         key.xmm[0] = em_mask_key(data0, mask1.x);
 299
 300         /*
 301          * Get part of 5 tuple: dst IP address lower 96 bits
 302          * and src IP address higher 32 bits.
 303          */
 304         key.xmm[1] = *(xmm_t *)data1;
 305
 306         /*
 307          * Get part of 5 tuple: dst port and src port
 308          * and dst IP address higher 32 bits.
 309          */
 310         key.xmm[2] = em_mask_key(data2, mask2.x);
 311
 312         /* Find destination port */
 313         ret = rte_hash_lookup(ipv6_l3fwd_lookup_struct, (const void *)&key);
 314         return (uint8_t)((ret < 0) ? portid : ipv6_l3fwd_out_if[ret]);
 315 }
 316
 317 #if defined(__SSE4_1__)
 318 #if defined(NO_HASH_MULTI_LOOKUP)
 319 #include "l3fwd_em_sse.h"
 320 #else
 321 #include "l3fwd_em_hlm_sse.h"
 322 #endif
 323 #else
 324 #include "l3fwd_em.h"
 325 #endif
 326
 327 static void
 328 convert_ipv4_5tuple(struct ipv4_5tuple *key1,
 329                 union ipv4_5tuple_host *key2)
 330 {
 331         key2->ip_dst = rte_cpu_to_be_32(key1->ip_dst);
 332         key2->ip_src = rte_cpu_to_be_32(key1->ip_src);
 333         key2->port_dst = rte_cpu_to_be_16(key1->port_dst);
 334         key2->port_src = rte_cpu_to_be_16(key1->port_src);
 335         key2->proto = key1->proto;
 336         key2->pad0 = 0;
 337         key2->pad1 = 0;
 338 }
 339
 340 static void
 341 convert_ipv6_5tuple(struct ipv6_5tuple *key1,
 342                 union ipv6_5tuple_host *key2)
 343 {
 344         uint32_t i;
 345
 346         for (i = 0; i < 16; i++) {
 347                 key2->ip_dst[i] = key1->ip_dst[i];
 348                 key2->ip_src[i] = key1->ip_src[i];
 349         }
 350         key2->port_dst = rte_cpu_to_be_16(key1->port_dst);
 351         key2->port_src = rte_cpu_to_be_16(key1->port_src);
 352         key2->proto = key1->proto;
 353         key2->pad0 = 0;
 354         key2->pad1 = 0;
 355         key2->reserve = 0;
 356 }
 357
 358 #define BYTE_VALUE_MAX 256
 359 #define ALL_32_BITS 0xffffffff
 360 #define BIT_8_TO_15 0x0000ff00
 361
 362 static inline void
 363 populate_ipv4_few_flow_into_table(const struct rte_hash *h)
 364 {
 365         uint32_t i;
 366         int32_t ret;
 367
 368         mask0 = (rte_xmm_t){.u32 = {BIT_8_TO_15, ALL_32_BITS,
 369                                 ALL_32_BITS, ALL_32_BITS} };
 370
 371         for (i = 0; i < IPV4_L3FWD_EM_NUM_ROUTES; i++) {
 372                 struct ipv4_l3fwd_em_route  entry;
 373                 union ipv4_5tuple_host newkey;
 374
 375                 entry = ipv4_l3fwd_em_route_array[i];
 376                 convert_ipv4_5tuple(&entry.key, &newkey);
 377                 ret = rte_hash_add_key(h, (void *) &newkey);
 378                 if (ret < 0) {
 379                         rte_exit(EXIT_FAILURE, "Unable to add entry %" PRIu32
 380                                 " to the l3fwd hash.\n", i);
 381                 }
 382                 ipv4_l3fwd_out_if[ret] = entry.if_out;
 383         }
 384         printf("Hash: Adding 0x%" PRIx64 " keys\n",
 385                 (uint64_t)IPV4_L3FWD_EM_NUM_ROUTES);
 386 }
 387
 388 #define BIT_16_TO_23 0x00ff0000
 389 static inline void
 390 populate_ipv6_few_flow_into_table(const struct rte_hash *h)
 391 {
 392         uint32_t i;
 393         int32_t ret;
 394
 395         mask1 = (rte_xmm_t){.u32 = {BIT_16_TO_23, ALL_32_BITS,
 396                                 ALL_32_BITS, ALL_32_BITS} };
 397
 398         mask2 = (rte_xmm_t){.u32 = {ALL_32_BITS, ALL_32_BITS, 0, 0} };
 399
 400         for (i = 0; i < IPV6_L3FWD_EM_NUM_ROUTES; i++) {
 401                 struct ipv6_l3fwd_em_route entry;
 402                 union ipv6_5tuple_host newkey;
 403
 404                 entry = ipv6_l3fwd_em_route_array[i];
 405                 convert_ipv6_5tuple(&entry.key, &newkey);
 406                 ret = rte_hash_add_key(h, (void *) &newkey);
 407                 if (ret < 0) {
 408                         rte_exit(EXIT_FAILURE, "Unable to add entry %" PRIu32
 409                                 " to the l3fwd hash.\n", i);
 410                 }
 411                 ipv6_l3fwd_out_if[ret] = entry.if_out;
 412         }
 413         printf("Hash: Adding 0x%" PRIx64 "keys\n",
 414                 (uint64_t)IPV6_L3FWD_EM_NUM_ROUTES);
 415 }
 416
 417 #define NUMBER_PORT_USED 4
 418 static inline void
 419 populate_ipv4_many_flow_into_table(const struct rte_hash *h,
 420                 unsigned int nr_flow)
 421 {
 422         unsigned i;
 423
 424         mask0 = (rte_xmm_t){.u32 = {BIT_8_TO_15, ALL_32_BITS,
 425                                 ALL_32_BITS, ALL_32_BITS} };
 426
 427         for (i = 0; i < nr_flow; i++) {
 428                 struct ipv4_l3fwd_em_route entry;
 429                 union ipv4_5tuple_host newkey;
 430
 431                 uint8_t a = (uint8_t)
 432                         ((i/NUMBER_PORT_USED)%BYTE_VALUE_MAX);
 433                 uint8_t b = (uint8_t)
 434                         (((i/NUMBER_PORT_USED)/BYTE_VALUE_MAX)%BYTE_VALUE_MAX);
 435                 uint8_t c = (uint8_t)
 436                         ((i/NUMBER_PORT_USED)/(BYTE_VALUE_MAX*BYTE_VALUE_MAX));
 437
 438                 /* Create the ipv4 exact match flow */
 439                 memset(&entry, 0, sizeof(entry));
 440                 switch (i & (NUMBER_PORT_USED - 1)) {
 441                 case 0:
 442                         entry = ipv4_l3fwd_em_route_array[0];
 443                         entry.key.ip_dst = IPv4(101, c, b, a);
 444                         break;
 445                 case 1:
 446                         entry = ipv4_l3fwd_em_route_array[1];
 447                         entry.key.ip_dst = IPv4(201, c, b, a);
 448                         break;
 449                 case 2:
 450                         entry = ipv4_l3fwd_em_route_array[2];
 451                         entry.key.ip_dst = IPv4(111, c, b, a);
 452                         break;
 453                 case 3:
 454                         entry = ipv4_l3fwd_em_route_array[3];
 455                         entry.key.ip_dst = IPv4(211, c, b, a);
 456                         break;
 457                 };
 458                 convert_ipv4_5tuple(&entry.key, &newkey);
 459                 int32_t ret = rte_hash_add_key(h, (void *) &newkey);
 460
 461                 if (ret < 0)
 462                         rte_exit(EXIT_FAILURE, "Unable to add entry %u\n", i);
 463
 464                 ipv4_l3fwd_out_if[ret] = (uint8_t) entry.if_out;
 465
 466         }
 467         printf("Hash: Adding 0x%x keys\n", nr_flow);
 468 }
 469
 470 static inline void
 471 populate_ipv6_many_flow_into_table(const struct rte_hash *h,
 472                 unsigned int nr_flow)
 473 {
 474         unsigned i;
 475
 476         mask1 = (rte_xmm_t){.u32 = {BIT_16_TO_23, ALL_32_BITS,
 477                                 ALL_32_BITS, ALL_32_BITS} };
 478         mask2 = (rte_xmm_t){.u32 = {ALL_32_BITS, ALL_32_BITS, 0, 0} };
 479
 480         for (i = 0; i < nr_flow; i++) {
 481                 struct ipv6_l3fwd_em_route entry;
 482                 union ipv6_5tuple_host newkey;
 483
 484                 uint8_t a = (uint8_t)
 485                         ((i/NUMBER_PORT_USED)%BYTE_VALUE_MAX);
 486                 uint8_t b = (uint8_t)
 487                         (((i/NUMBER_PORT_USED)/BYTE_VALUE_MAX)%BYTE_VALUE_MAX);
 488                 uint8_t c = (uint8_t)
 489                         ((i/NUMBER_PORT_USED)/(BYTE_VALUE_MAX*BYTE_VALUE_MAX));
 490
 491                 /* Create the ipv6 exact match flow */
 492                 memset(&entry, 0, sizeof(entry));
 493                 switch (i & (NUMBER_PORT_USED - 1)) {
 494                 case 0:
 495                         entry = ipv6_l3fwd_em_route_array[0];
 496                         break;
 497                 case 1:
 498                         entry = ipv6_l3fwd_em_route_array[1];
 499                         break;
 500                 case 2:
 501                         entry = ipv6_l3fwd_em_route_array[2];
 502                         break;
 503                 case 3:
 504                         entry = ipv6_l3fwd_em_route_array[3];
 505                         break;
 506                 };
 507                 entry.key.ip_dst[13] = c;
 508                 entry.key.ip_dst[14] = b;
 509                 entry.key.ip_dst[15] = a;
 510                 convert_ipv6_5tuple(&entry.key, &newkey);
 511                 int32_t ret = rte_hash_add_key(h, (void *) &newkey);
 512
 513                 if (ret < 0)
 514                         rte_exit(EXIT_FAILURE, "Unable to add entry %u\n", i);
 515
 516                 ipv6_l3fwd_out_if[ret] = (uint8_t) entry.if_out;
 517
 518         }
 519         printf("Hash: Adding 0x%x keys\n", nr_flow);
 520 }
 521
 522 /* main processing loop */
 523 int
 524 em_main_loop(__attribute__((unused)) void *dummy)
 525 {
 526         struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
 527         unsigned lcore_id;
 528         uint64_t prev_tsc, diff_tsc, cur_tsc;
 529         int i, nb_rx;
 530         uint8_t portid, queueid;
 531         struct lcore_conf *qconf;
 532         const uint64_t drain_tsc = (rte_get_tsc_hz() + US_PER_S - 1) /
 533                 US_PER_S * BURST_TX_DRAIN_US;
 534
 535         prev_tsc = 0;
 536
 537         lcore_id = rte_lcore_id();
 538         qconf = &lcore_conf[lcore_id];
 539
 540         if (qconf->n_rx_queue == 0) {
 541                 RTE_LOG(INFO, L3FWD, "lcore %u has nothing to do\n", lcore_id);
 542                 return 0;
 543         }
 544
 545         RTE_LOG(INFO, L3FWD, "entering main loop on lcore %u\n", lcore_id);
 546
 547         for (i = 0; i < qconf->n_rx_queue; i++) {
 548
 549                 portid = qconf->rx_queue_list[i].port_id;
 550                 queueid = qconf->rx_queue_list[i].queue_id;
 551                 RTE_LOG(INFO, L3FWD,
 552                         " -- lcoreid=%u portid=%hhu rxqueueid=%hhu\n",
 553                         lcore_id, portid, queueid);
 554         }
 555
 556         while (!force_quit) {
 557
 558                 cur_tsc = rte_rdtsc();
 559
 560                 /*
 561                  * TX burst queue drain
 562                  */
 563                 diff_tsc = cur_tsc - prev_tsc;
 564                 if (unlikely(diff_tsc > drain_tsc)) {
 565
 566                         for (i = 0; i < qconf->n_tx_port; ++i) {
 567                                 portid = qconf->tx_port_id[i];
 568                                 if (qconf->tx_mbufs[portid].len == 0)
 569                                         continue;
 570                                 send_burst(qconf,
 571                                         qconf->tx_mbufs[portid].len,
 572                                         portid);
 573                                 qconf->tx_mbufs[portid].len = 0;
 574                         }
 575
 576                         prev_tsc = cur_tsc;
 577                 }
 578
 579                 /*
 580                  * Read packet from RX queues
 581                  */
 582                 for (i = 0; i < qconf->n_rx_queue; ++i) {
 583                         portid = qconf->rx_queue_list[i].port_id;
 584                         queueid = qconf->rx_queue_list[i].queue_id;
 585                         nb_rx = rte_eth_rx_burst(portid, queueid, pkts_burst,
 586                                 MAX_PKT_BURST);
 587                         if (nb_rx == 0)
 588                                 continue;
 589
 590 #if defined(__SSE4_1__)
 591                         l3fwd_em_send_packets(nb_rx, pkts_burst,
 592                                                         portid, qconf);
 593 #else
 594                         l3fwd_em_no_opt_send_packets(nb_rx, pkts_burst,
 595                                                         portid, qconf);
 596 #endif /* __SSE_4_1__ */
 597                 }
 598         }
 599
 600         return 0;
 601 }
 602
 603 /*
 604  * Initialize exact match (hash) parameters.
 605  */
 606 void
 607 setup_hash(const int socketid)
 608 {
 609         struct rte_hash_parameters ipv4_l3fwd_hash_params = {
 610                 .name = NULL,
 611                 .entries = L3FWD_HASH_ENTRIES,
 612                 .key_len = sizeof(union ipv4_5tuple_host),
 613                 .hash_func = ipv4_hash_crc,
 614                 .hash_func_init_val = 0,
 615         };
 616
 617         struct rte_hash_parameters ipv6_l3fwd_hash_params = {
 618                 .name = NULL,
 619                 .entries = L3FWD_HASH_ENTRIES,
 620                 .key_len = sizeof(union ipv6_5tuple_host),
 621                 .hash_func = ipv6_hash_crc,
 622                 .hash_func_init_val = 0,
 623         };
 624
 625         char s[64];
 626
 627         /* create ipv4 hash */
 628         snprintf(s, sizeof(s), "ipv4_l3fwd_hash_%d", socketid);
 629         ipv4_l3fwd_hash_params.name = s;
 630         ipv4_l3fwd_hash_params.socket_id = socketid;
 631         ipv4_l3fwd_em_lookup_struct[socketid] =
 632                 rte_hash_create(&ipv4_l3fwd_hash_params);
 633         if (ipv4_l3fwd_em_lookup_struct[socketid] == NULL)
 634                 rte_exit(EXIT_FAILURE,
 635                         "Unable to create the l3fwd hash on socket %d\n",
 636                         socketid);
 637
 638         /* create ipv6 hash */
 639         snprintf(s, sizeof(s), "ipv6_l3fwd_hash_%d", socketid);
 640         ipv6_l3fwd_hash_params.name = s;
 641         ipv6_l3fwd_hash_params.socket_id = socketid;
 642         ipv6_l3fwd_em_lookup_struct[socketid] =
 643                 rte_hash_create(&ipv6_l3fwd_hash_params);
 644         if (ipv6_l3fwd_em_lookup_struct[socketid] == NULL)
 645                 rte_exit(EXIT_FAILURE,
 646                         "Unable to create the l3fwd hash on socket %d\n",
 647                         socketid);
 648
 649         if (hash_entry_number != HASH_ENTRY_NUMBER_DEFAULT) {
 650                 /* For testing hash matching with a large number of flows we
 651                  * generate millions of IP 5-tuples with an incremented dst
 652                  * address to initialize the hash table. */
 653                 if (ipv6 == 0) {
 654                         /* populate the ipv4 hash */
 655                         populate_ipv4_many_flow_into_table(
 656                                 ipv4_l3fwd_em_lookup_struct[socketid],
 657                                 hash_entry_number);
 658                 } else {
 659                         /* populate the ipv6 hash */
 660                         populate_ipv6_many_flow_into_table(
 661                                 ipv6_l3fwd_em_lookup_struct[socketid],
 662                                 hash_entry_number);
 663                 }
 664         } else {
 665                 /*
 666                  * Use data in ipv4/ipv6 l3fwd lookup table
 667                  * directly to initialize the hash table.
 668                  */
 669                 if (ipv6 == 0) {
 670                         /* populate the ipv4 hash */
 671                         populate_ipv4_few_flow_into_table(
 672                                 ipv4_l3fwd_em_lookup_struct[socketid]);
 673                 } else {
 674                         /* populate the ipv6 hash */
 675                         populate_ipv6_few_flow_into_table(
 676                                 ipv6_l3fwd_em_lookup_struct[socketid]);
 677                 }
 678         }
 679 }
 680
 681 /* Return ipv4/ipv6 em fwd lookup struct. */
 682 void *
 683 em_get_ipv4_l3fwd_lookup_struct(const int socketid)
 684 {
 685         return ipv4_l3fwd_em_lookup_struct[socketid];
 686 }
 687
 688 void *
 689 em_get_ipv6_l3fwd_lookup_struct(const int socketid)
 690 {
 691         return ipv6_l3fwd_em_lookup_struct[socketid];
 692 }