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         __m128i 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         __m128i xmm[XMM_NUM_IN_IPV6_5TUPLE];
 113 };
 114
 115 struct ipv4_l3fwd_em_route {
 116         struct ipv4_5tuple key;
 117         uint8_t if_out;
 118 };
 119
 120 struct ipv6_l3fwd_em_route {
 121         struct ipv6_5tuple key;
 122         uint8_t if_out;
 123 };
 124
 125 static struct ipv4_l3fwd_em_route ipv4_l3fwd_em_route_array[] = {
 126         {{IPv4(101, 0, 0, 0), IPv4(100, 10, 0, 1),  101, 11, IPPROTO_TCP}, 0},
 127         {{IPv4(201, 0, 0, 0), IPv4(200, 20, 0, 1),  102, 12, IPPROTO_TCP}, 1},
 128         {{IPv4(111, 0, 0, 0), IPv4(100, 30, 0, 1),  101, 11, IPPROTO_TCP}, 2},
 129         {{IPv4(211, 0, 0, 0), IPv4(200, 40, 0, 1),  102, 12, IPPROTO_TCP}, 3},
 130 };
 131
 132 static struct ipv6_l3fwd_em_route ipv6_l3fwd_em_route_array[] = {
 133         {{
 134         {0xfe, 0x80, 0, 0, 0, 0, 0, 0, 0x02, 0x1e, 0x67, 0xff, 0xfe, 0, 0, 0},
 135         {0xfe, 0x80, 0, 0, 0, 0, 0, 0, 0x02, 0x1b, 0x21, 0xff, 0xfe, 0x91, 0x38, 0x05},
 136         101, 11, IPPROTO_TCP}, 0},
 137
 138         {{
 139         {0xfe, 0x90, 0, 0, 0, 0, 0, 0, 0x02, 0x1e, 0x67, 0xff, 0xfe, 0, 0, 0},
 140         {0xfe, 0x90, 0, 0, 0, 0, 0, 0, 0x02, 0x1b, 0x21, 0xff, 0xfe, 0x91, 0x38, 0x05},
 141         102, 12, IPPROTO_TCP}, 1},
 142
 143         {{
 144         {0xfe, 0xa0, 0, 0, 0, 0, 0, 0, 0x02, 0x1e, 0x67, 0xff, 0xfe, 0, 0, 0},
 145         {0xfe, 0xa0, 0, 0, 0, 0, 0, 0, 0x02, 0x1b, 0x21, 0xff, 0xfe, 0x91, 0x38, 0x05},
 146         101, 11, IPPROTO_TCP}, 2},
 147
 148         {{
 149         {0xfe, 0xb0, 0, 0, 0, 0, 0, 0, 0x02, 0x1e, 0x67, 0xff, 0xfe, 0, 0, 0},
 150         {0xfe, 0xb0, 0, 0, 0, 0, 0, 0, 0x02, 0x1b, 0x21, 0xff, 0xfe, 0x91, 0x38, 0x05},
 151         102, 12, IPPROTO_TCP}, 3},
 152 };
 153
 154 struct rte_hash *ipv4_l3fwd_em_lookup_struct[NB_SOCKETS];
 155 struct rte_hash *ipv6_l3fwd_em_lookup_struct[NB_SOCKETS];
 156
 157 static inline uint32_t
 158 ipv4_hash_crc(const void *data, __rte_unused uint32_t data_len,
 159                 uint32_t init_val)
 160 {
 161         const union ipv4_5tuple_host *k;
 162         uint32_t t;
 163         const uint32_t *p;
 164
 165         k = data;
 166         t = k->proto;
 167         p = (const uint32_t *)&k->port_src;
 168
 169 #ifdef RTE_MACHINE_CPUFLAG_SSE4_2
 170         init_val = rte_hash_crc_4byte(t, init_val);
 171         init_val = rte_hash_crc_4byte(k->ip_src, init_val);
 172         init_val = rte_hash_crc_4byte(k->ip_dst, init_val);
 173         init_val = rte_hash_crc_4byte(*p, init_val);
 174 #else /* RTE_MACHINE_CPUFLAG_SSE4_2 */
 175         init_val = rte_jhash_1word(t, init_val);
 176         init_val = rte_jhash_1word(k->ip_src, init_val);
 177         init_val = rte_jhash_1word(k->ip_dst, init_val);
 178         init_val = rte_jhash_1word(*p, init_val);
 179 #endif /* RTE_MACHINE_CPUFLAG_SSE4_2 */
 180
 181         return init_val;
 182 }
 183
 184 static inline uint32_t
 185 ipv6_hash_crc(const void *data, __rte_unused uint32_t data_len,
 186                 uint32_t init_val)
 187 {
 188         const union ipv6_5tuple_host *k;
 189         uint32_t t;
 190         const uint32_t *p;
 191 #ifdef RTE_MACHINE_CPUFLAG_SSE4_2
 192         const uint32_t  *ip_src0, *ip_src1, *ip_src2, *ip_src3;
 193         const uint32_t  *ip_dst0, *ip_dst1, *ip_dst2, *ip_dst3;
 194 #endif /* RTE_MACHINE_CPUFLAG_SSE4_2 */
 195
 196         k = data;
 197         t = k->proto;
 198         p = (const uint32_t *)&k->port_src;
 199
 200 #ifdef RTE_MACHINE_CPUFLAG_SSE4_2
 201         ip_src0 = (const uint32_t *) k->ip_src;
 202         ip_src1 = (const uint32_t *)(k->ip_src+4);
 203         ip_src2 = (const uint32_t *)(k->ip_src+8);
 204         ip_src3 = (const uint32_t *)(k->ip_src+12);
 205         ip_dst0 = (const uint32_t *) k->ip_dst;
 206         ip_dst1 = (const uint32_t *)(k->ip_dst+4);
 207         ip_dst2 = (const uint32_t *)(k->ip_dst+8);
 208         ip_dst3 = (const uint32_t *)(k->ip_dst+12);
 209         init_val = rte_hash_crc_4byte(t, init_val);
 210         init_val = rte_hash_crc_4byte(*ip_src0, init_val);
 211         init_val = rte_hash_crc_4byte(*ip_src1, init_val);
 212         init_val = rte_hash_crc_4byte(*ip_src2, init_val);
 213         init_val = rte_hash_crc_4byte(*ip_src3, init_val);
 214         init_val = rte_hash_crc_4byte(*ip_dst0, init_val);
 215         init_val = rte_hash_crc_4byte(*ip_dst1, init_val);
 216         init_val = rte_hash_crc_4byte(*ip_dst2, init_val);
 217         init_val = rte_hash_crc_4byte(*ip_dst3, init_val);
 218         init_val = rte_hash_crc_4byte(*p, init_val);
 219 #else /* RTE_MACHINE_CPUFLAG_SSE4_2 */
 220         init_val = rte_jhash_1word(t, init_val);
 221         init_val = rte_jhash(k->ip_src,
 222                         sizeof(uint8_t) * IPV6_ADDR_LEN, init_val);
 223         init_val = rte_jhash(k->ip_dst,
 224                         sizeof(uint8_t) * IPV6_ADDR_LEN, init_val);
 225         init_val = rte_jhash_1word(*p, init_val);
 226 #endif /* RTE_MACHINE_CPUFLAG_SSE4_2 */
 227         return init_val;
 228 }
 229
 230 #define IPV4_L3FWD_EM_NUM_ROUTES \
 231         (sizeof(ipv4_l3fwd_em_route_array) / sizeof(ipv4_l3fwd_em_route_array[0]))
 232
 233 #define IPV6_L3FWD_EM_NUM_ROUTES \
 234         (sizeof(ipv6_l3fwd_em_route_array) / sizeof(ipv6_l3fwd_em_route_array[0]))
 235
 236 static uint8_t ipv4_l3fwd_out_if[L3FWD_HASH_ENTRIES] __rte_cache_aligned;
 237 static uint8_t ipv6_l3fwd_out_if[L3FWD_HASH_ENTRIES] __rte_cache_aligned;
 238
 239 static __m128i mask0;
 240 static __m128i mask1;
 241 static __m128i mask2;
 242
 243 static inline uint8_t
 244 em_get_ipv4_dst_port(void *ipv4_hdr, uint8_t portid, void *lookup_struct)
 245 {
 246         int ret = 0;
 247         union ipv4_5tuple_host key;
 248         struct rte_hash *ipv4_l3fwd_lookup_struct =
 249                 (struct rte_hash *)lookup_struct;
 250
 251         ipv4_hdr = (uint8_t *)ipv4_hdr + offsetof(struct ipv4_hdr, time_to_live);
 252         __m128i data = _mm_loadu_si128((__m128i *)(ipv4_hdr));
 253
 254         /*
 255          * Get 5 tuple: dst port, src port, dst IP address,
 256          * src IP address and protocol.
 257          */
 258         key.xmm = _mm_and_si128(data, mask0);
 259
 260         /* Find destination port */
 261         ret = rte_hash_lookup(ipv4_l3fwd_lookup_struct, (const void *)&key);
 262         return (uint8_t)((ret < 0) ? portid : ipv4_l3fwd_out_if[ret]);
 263 }
 264
 265 static inline uint8_t
 266 em_get_ipv6_dst_port(void *ipv6_hdr,  uint8_t portid, void *lookup_struct)
 267 {
 268         int ret = 0;
 269         union ipv6_5tuple_host key;
 270         struct rte_hash *ipv6_l3fwd_lookup_struct =
 271                 (struct rte_hash *)lookup_struct;
 272
 273         ipv6_hdr = (uint8_t *)ipv6_hdr + offsetof(struct ipv6_hdr, payload_len);
 274         __m128i data0 =
 275                 _mm_loadu_si128((__m128i *)(ipv6_hdr));
 276         __m128i data1 =
 277                 _mm_loadu_si128((__m128i *)(((uint8_t *)ipv6_hdr)+
 278                                         sizeof(__m128i)));
 279         __m128i data2 =
 280                 _mm_loadu_si128((__m128i *)(((uint8_t *)ipv6_hdr)+
 281                                         sizeof(__m128i)+sizeof(__m128i)));
 282
 283         /* Get part of 5 tuple: src IP address lower 96 bits and protocol */
 284         key.xmm[0] = _mm_and_si128(data0, mask1);
 285
 286         /*
 287          * Get part of 5 tuple: dst IP address lower 96 bits
 288          * and src IP address higher 32 bits.
 289          */
 290         key.xmm[1] = data1;
 291
 292         /*
 293          * Get part of 5 tuple: dst port and src port
 294          * and dst IP address higher 32 bits.
 295          */
 296         key.xmm[2] = _mm_and_si128(data2, mask2);
 297
 298         /* Find destination port */
 299         ret = rte_hash_lookup(ipv6_l3fwd_lookup_struct, (const void *)&key);
 300         return (uint8_t)((ret < 0) ? portid : ipv6_l3fwd_out_if[ret]);
 301 }
 302
 303 /*
 304  * Include header file if SSE4_1 is enabled for
 305  * buffer optimization i.e. ENABLE_MULTI_BUFFER_OPTIMIZE=1.
 306  */
 307 #if defined(__SSE4_1__)
 308 #ifndef HASH_MULTI_LOOKUP
 309 #include "l3fwd_em_sse.h"
 310 #else
 311 #include "l3fwd_em_hlm_sse.h"
 312 #endif
 313 #else
 314 #include "l3fwd_em.h"
 315 #endif
 316
 317 static void
 318 convert_ipv4_5tuple(struct ipv4_5tuple *key1,
 319                 union ipv4_5tuple_host *key2)
 320 {
 321         key2->ip_dst = rte_cpu_to_be_32(key1->ip_dst);
 322         key2->ip_src = rte_cpu_to_be_32(key1->ip_src);
 323         key2->port_dst = rte_cpu_to_be_16(key1->port_dst);
 324         key2->port_src = rte_cpu_to_be_16(key1->port_src);
 325         key2->proto = key1->proto;
 326         key2->pad0 = 0;
 327         key2->pad1 = 0;
 328 }
 329
 330 static void
 331 convert_ipv6_5tuple(struct ipv6_5tuple *key1,
 332                 union ipv6_5tuple_host *key2)
 333 {
 334         uint32_t i;
 335
 336         for (i = 0; i < 16; i++) {
 337                 key2->ip_dst[i] = key1->ip_dst[i];
 338                 key2->ip_src[i] = key1->ip_src[i];
 339         }
 340         key2->port_dst = rte_cpu_to_be_16(key1->port_dst);
 341         key2->port_src = rte_cpu_to_be_16(key1->port_src);
 342         key2->proto = key1->proto;
 343         key2->pad0 = 0;
 344         key2->pad1 = 0;
 345         key2->reserve = 0;
 346 }
 347
 348 #define BYTE_VALUE_MAX 256
 349 #define ALL_32_BITS 0xffffffff
 350 #define BIT_8_TO_15 0x0000ff00
 351 static inline void
 352 populate_ipv4_few_flow_into_table(const struct rte_hash *h)
 353 {
 354         uint32_t i;
 355         int32_t ret;
 356
 357         mask0 = _mm_set_epi32(ALL_32_BITS, ALL_32_BITS,
 358                                 ALL_32_BITS, BIT_8_TO_15);
 359
 360         for (i = 0; i < IPV4_L3FWD_EM_NUM_ROUTES; i++) {
 361                 struct ipv4_l3fwd_em_route  entry;
 362                 union ipv4_5tuple_host newkey;
 363
 364                 entry = ipv4_l3fwd_em_route_array[i];
 365                 convert_ipv4_5tuple(&entry.key, &newkey);
 366                 ret = rte_hash_add_key(h, (void *) &newkey);
 367                 if (ret < 0) {
 368                         rte_exit(EXIT_FAILURE, "Unable to add entry %" PRIu32
 369                                 " to the l3fwd hash.\n", i);
 370                 }
 371                 ipv4_l3fwd_out_if[ret] = entry.if_out;
 372         }
 373         printf("Hash: Adding 0x%" PRIx64 " keys\n",
 374                 (uint64_t)IPV4_L3FWD_EM_NUM_ROUTES);
 375 }
 376
 377 #define BIT_16_TO_23 0x00ff0000
 378 static inline void
 379 populate_ipv6_few_flow_into_table(const struct rte_hash *h)
 380 {
 381         uint32_t i;
 382         int32_t ret;
 383
 384         mask1 = _mm_set_epi32(ALL_32_BITS, ALL_32_BITS,
 385                                 ALL_32_BITS, BIT_16_TO_23);
 386
 387         mask2 = _mm_set_epi32(0, 0, ALL_32_BITS, ALL_32_BITS);
 388
 389         for (i = 0; i < IPV6_L3FWD_EM_NUM_ROUTES; i++) {
 390                 struct ipv6_l3fwd_em_route entry;
 391                 union ipv6_5tuple_host newkey;
 392
 393                 entry = ipv6_l3fwd_em_route_array[i];
 394                 convert_ipv6_5tuple(&entry.key, &newkey);
 395                 ret = rte_hash_add_key(h, (void *) &newkey);
 396                 if (ret < 0) {
 397                         rte_exit(EXIT_FAILURE, "Unable to add entry %" PRIu32
 398                                 " to the l3fwd hash.\n", i);
 399                 }
 400                 ipv6_l3fwd_out_if[ret] = entry.if_out;
 401         }
 402         printf("Hash: Adding 0x%" PRIx64 "keys\n",
 403                 (uint64_t)IPV6_L3FWD_EM_NUM_ROUTES);
 404 }
 405
 406 #define NUMBER_PORT_USED 4
 407 static inline void
 408 populate_ipv4_many_flow_into_table(const struct rte_hash *h,
 409                 unsigned int nr_flow)
 410 {
 411         unsigned i;
 412
 413         mask0 = _mm_set_epi32(ALL_32_BITS, ALL_32_BITS,
 414                                 ALL_32_BITS, BIT_8_TO_15);
 415
 416         for (i = 0; i < nr_flow; i++) {
 417                 struct ipv4_l3fwd_em_route entry;
 418                 union ipv4_5tuple_host newkey;
 419
 420                 uint8_t a = (uint8_t)
 421                         ((i/NUMBER_PORT_USED)%BYTE_VALUE_MAX);
 422                 uint8_t b = (uint8_t)
 423                         (((i/NUMBER_PORT_USED)/BYTE_VALUE_MAX)%BYTE_VALUE_MAX);
 424                 uint8_t c = (uint8_t)
 425                         ((i/NUMBER_PORT_USED)/(BYTE_VALUE_MAX*BYTE_VALUE_MAX));
 426
 427                 /* Create the ipv4 exact match flow */
 428                 memset(&entry, 0, sizeof(entry));
 429                 switch (i & (NUMBER_PORT_USED - 1)) {
 430                 case 0:
 431                         entry = ipv4_l3fwd_em_route_array[0];
 432                         entry.key.ip_dst = IPv4(101, c, b, a);
 433                         break;
 434                 case 1:
 435                         entry = ipv4_l3fwd_em_route_array[1];
 436                         entry.key.ip_dst = IPv4(201, c, b, a);
 437                         break;
 438                 case 2:
 439                         entry = ipv4_l3fwd_em_route_array[2];
 440                         entry.key.ip_dst = IPv4(111, c, b, a);
 441                         break;
 442                 case 3:
 443                         entry = ipv4_l3fwd_em_route_array[3];
 444                         entry.key.ip_dst = IPv4(211, c, b, a);
 445                         break;
 446                 };
 447                 convert_ipv4_5tuple(&entry.key, &newkey);
 448                 int32_t ret = rte_hash_add_key(h, (void *) &newkey);
 449
 450                 if (ret < 0)
 451                         rte_exit(EXIT_FAILURE, "Unable to add entry %u\n", i);
 452
 453                 ipv4_l3fwd_out_if[ret] = (uint8_t) entry.if_out;
 454
 455         }
 456         printf("Hash: Adding 0x%x keys\n", nr_flow);
 457 }
 458
 459 static inline void
 460 populate_ipv6_many_flow_into_table(const struct rte_hash *h,
 461                 unsigned int nr_flow)
 462 {
 463         unsigned i;
 464
 465         mask1 = _mm_set_epi32(ALL_32_BITS, ALL_32_BITS,
 466                                 ALL_32_BITS, BIT_16_TO_23);
 467         mask2 = _mm_set_epi32(0, 0, ALL_32_BITS, ALL_32_BITS);
 468
 469         for (i = 0; i < nr_flow; i++) {
 470                 struct ipv6_l3fwd_em_route entry;
 471                 union ipv6_5tuple_host newkey;
 472
 473                 uint8_t a = (uint8_t)
 474                         ((i/NUMBER_PORT_USED)%BYTE_VALUE_MAX);
 475                 uint8_t b = (uint8_t)
 476                         (((i/NUMBER_PORT_USED)/BYTE_VALUE_MAX)%BYTE_VALUE_MAX);
 477                 uint8_t c = (uint8_t)
 478                         ((i/NUMBER_PORT_USED)/(BYTE_VALUE_MAX*BYTE_VALUE_MAX));
 479
 480                 /* Create the ipv6 exact match flow */
 481                 memset(&entry, 0, sizeof(entry));
 482                 switch (i & (NUMBER_PORT_USED - 1)) {
 483                 case 0:
 484                         entry = ipv6_l3fwd_em_route_array[0];
 485                         break;
 486                 case 1:
 487                         entry = ipv6_l3fwd_em_route_array[1];
 488                         break;
 489                 case 2:
 490                         entry = ipv6_l3fwd_em_route_array[2];
 491                         break;
 492                 case 3:
 493                         entry = ipv6_l3fwd_em_route_array[3];
 494                         break;
 495                 };
 496                 entry.key.ip_dst[13] = c;
 497                 entry.key.ip_dst[14] = b;
 498                 entry.key.ip_dst[15] = a;
 499                 convert_ipv6_5tuple(&entry.key, &newkey);
 500                 int32_t ret = rte_hash_add_key(h, (void *) &newkey);
 501
 502                 if (ret < 0)
 503                         rte_exit(EXIT_FAILURE, "Unable to add entry %u\n", i);
 504
 505                 ipv6_l3fwd_out_if[ret] = (uint8_t) entry.if_out;
 506
 507         }
 508         printf("Hash: Adding 0x%x keys\n", nr_flow);
 509 }
 510
 511 /* main processing loop */
 512 int
 513 em_main_loop(__attribute__((unused)) void *dummy)
 514 {
 515         struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
 516         unsigned lcore_id;
 517         uint64_t prev_tsc, diff_tsc, cur_tsc;
 518         int i, nb_rx;
 519         uint8_t portid, queueid;
 520         struct lcore_conf *qconf;
 521         const uint64_t drain_tsc = (rte_get_tsc_hz() + US_PER_S - 1) /
 522                 US_PER_S * BURST_TX_DRAIN_US;
 523
 524         prev_tsc = 0;
 525
 526         lcore_id = rte_lcore_id();
 527         qconf = &lcore_conf[lcore_id];
 528
 529         if (qconf->n_rx_queue == 0) {
 530                 RTE_LOG(INFO, L3FWD, "lcore %u has nothing to do\n", lcore_id);
 531                 return 0;
 532         }
 533
 534         RTE_LOG(INFO, L3FWD, "entering main loop on lcore %u\n", lcore_id);
 535
 536         for (i = 0; i < qconf->n_rx_queue; i++) {
 537
 538                 portid = qconf->rx_queue_list[i].port_id;
 539                 queueid = qconf->rx_queue_list[i].queue_id;
 540                 RTE_LOG(INFO, L3FWD,
 541                         " -- lcoreid=%u portid=%hhu rxqueueid=%hhu\n",
 542                         lcore_id, portid, queueid);
 543         }
 544
 545         while (!force_quit) {
 546
 547                 cur_tsc = rte_rdtsc();
 548
 549                 /*
 550                  * TX burst queue drain
 551                  */
 552                 diff_tsc = cur_tsc - prev_tsc;
 553                 if (unlikely(diff_tsc > drain_tsc)) {
 554
 555                         for (i = 0; i < qconf->n_rx_queue; i++) {
 556                                 portid = qconf->rx_queue_list[i].port_id;
 557                                 if (qconf->tx_mbufs[portid].len == 0)
 558                                         continue;
 559                                 send_burst(qconf,
 560                                         qconf->tx_mbufs[portid].len,
 561                                         portid);
 562                                 qconf->tx_mbufs[portid].len = 0;
 563                         }
 564
 565                         prev_tsc = cur_tsc;
 566                 }
 567
 568                 /*
 569                  * Read packet from RX queues
 570                  */
 571                 for (i = 0; i < qconf->n_rx_queue; ++i) {
 572                         portid = qconf->rx_queue_list[i].port_id;
 573                         queueid = qconf->rx_queue_list[i].queue_id;
 574                         nb_rx = rte_eth_rx_burst(portid, queueid, pkts_burst,
 575                                 MAX_PKT_BURST);
 576                         if (nb_rx == 0)
 577                                 continue;
 578
 579                         /*
 580                          * For SSE4_1 use ENABLE_MULTI_BUFFER_OPTIMIZE=1
 581                          * code.
 582                          */
 583 #if defined(__SSE4_1__)
 584                         l3fwd_em_send_packets(nb_rx, pkts_burst,
 585                                                         portid, qconf);
 586 #else
 587                         l3fwd_em_no_opt_send_packets(nb_rx, pkts_burst,
 588                                                         portid, qconf);
 589 #endif /* __SSE_4_1__ */
 590                 }
 591         }
 592
 593         return 0;
 594 }
 595
 596 /*
 597  * Initialize exact match (hash) parameters.
 598  */
 599 void
 600 setup_hash(const int socketid)
 601 {
 602         struct rte_hash_parameters ipv4_l3fwd_hash_params = {
 603                 .name = NULL,
 604                 .entries = L3FWD_HASH_ENTRIES,
 605                 .key_len = sizeof(union ipv4_5tuple_host),
 606                 .hash_func = ipv4_hash_crc,
 607                 .hash_func_init_val = 0,
 608         };
 609
 610         struct rte_hash_parameters ipv6_l3fwd_hash_params = {
 611                 .name = NULL,
 612                 .entries = L3FWD_HASH_ENTRIES,
 613                 .key_len = sizeof(union ipv6_5tuple_host),
 614                 .hash_func = ipv6_hash_crc,
 615                 .hash_func_init_val = 0,
 616         };
 617
 618         char s[64];
 619
 620         /* create ipv4 hash */
 621         snprintf(s, sizeof(s), "ipv4_l3fwd_hash_%d", socketid);
 622         ipv4_l3fwd_hash_params.name = s;
 623         ipv4_l3fwd_hash_params.socket_id = socketid;
 624         ipv4_l3fwd_em_lookup_struct[socketid] =
 625                 rte_hash_create(&ipv4_l3fwd_hash_params);
 626         if (ipv4_l3fwd_em_lookup_struct[socketid] == NULL)
 627                 rte_exit(EXIT_FAILURE,
 628                         "Unable to create the l3fwd hash on socket %d\n",
 629                         socketid);
 630
 631         /* create ipv6 hash */
 632         snprintf(s, sizeof(s), "ipv6_l3fwd_hash_%d", socketid);
 633         ipv6_l3fwd_hash_params.name = s;
 634         ipv6_l3fwd_hash_params.socket_id = socketid;
 635         ipv6_l3fwd_em_lookup_struct[socketid] =
 636                 rte_hash_create(&ipv6_l3fwd_hash_params);
 637         if (ipv6_l3fwd_em_lookup_struct[socketid] == NULL)
 638                 rte_exit(EXIT_FAILURE,
 639                         "Unable to create the l3fwd hash on socket %d\n",
 640                         socketid);
 641
 642         if (hash_entry_number != HASH_ENTRY_NUMBER_DEFAULT) {
 643                 /* For testing hash matching with a large number of flows we
 644                  * generate millions of IP 5-tuples with an incremented dst
 645                  * address to initialize the hash table. */
 646                 if (ipv6 == 0) {
 647                         /* populate the ipv4 hash */
 648                         populate_ipv4_many_flow_into_table(
 649                                 ipv4_l3fwd_em_lookup_struct[socketid],
 650                                 hash_entry_number);
 651                 } else {
 652                         /* populate the ipv6 hash */
 653                         populate_ipv6_many_flow_into_table(
 654                                 ipv6_l3fwd_em_lookup_struct[socketid],
 655                                 hash_entry_number);
 656                 }
 657         } else {
 658                 /*
 659                  * Use data in ipv4/ipv6 l3fwd lookup table
 660                  * directly to initialize the hash table.
 661                  */
 662                 if (ipv6 == 0) {
 663                         /* populate the ipv4 hash */
 664                         populate_ipv4_few_flow_into_table(
 665                                 ipv4_l3fwd_em_lookup_struct[socketid]);
 666                 } else {
 667                         /* populate the ipv6 hash */
 668                         populate_ipv6_few_flow_into_table(
 669                                 ipv6_l3fwd_em_lookup_struct[socketid]);
 670                 }
 671         }
 672 }
 673
 674 /* Return ipv4/ipv6 em fwd lookup struct. */
 675 void *
 676 em_get_ipv4_l3fwd_lookup_struct(const int socketid)
 677 {
 678         return ipv4_l3fwd_em_lookup_struct[socketid];
 679 }
 680
 681 void *
 682 em_get_ipv6_l3fwd_lookup_struct(const int socketid)
 683 {
 684         return ipv6_l3fwd_em_lookup_struct[socketid];
 685 }