examples/vmdq_dcb/main.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2014 Intel Corporation
   3  */
   4
   5 #include <stdint.h>
   6 #include <sys/queue.h>
   7 #include <stdlib.h>
   8 #include <string.h>
   9 #include <stdio.h>
  10 #include <assert.h>
  11 #include <errno.h>
  12 #include <signal.h>
  13 #include <stdarg.h>
  14 #include <inttypes.h>
  15 #include <getopt.h>
  16
  17 #include <rte_common.h>
  18 #include <rte_log.h>
  19 #include <rte_memory.h>
  20 #include <rte_memcpy.h>
  21 #include <rte_eal.h>
  22 #include <rte_launch.h>
  23 #include <rte_atomic.h>
  24 #include <rte_cycles.h>
  25 #include <rte_prefetch.h>
  26 #include <rte_lcore.h>
  27 #include <rte_per_lcore.h>
  28 #include <rte_branch_prediction.h>
  29 #include <rte_interrupts.h>
  30 #include <rte_random.h>
  31 #include <rte_debug.h>
  32 #include <rte_ether.h>
  33 #include <rte_ethdev.h>
  34 #include <rte_mempool.h>
  35 #include <rte_mbuf.h>
  36
  37 /* basic constants used in application */
  38 #define MAX_QUEUES 1024
  39 /*
  40  * 1024 queues require to meet the needs of a large number of vmdq_pools.
  41  * (RX/TX_queue_nb * RX/TX_ring_descriptors_nb) per port.
  42  */
  43 #define NUM_MBUFS_PER_PORT (MAX_QUEUES * RTE_MAX(RTE_TEST_RX_DESC_DEFAULT, \
  44                                                 RTE_TEST_TX_DESC_DEFAULT))
  45 #define MBUF_CACHE_SIZE 64
  46
  47 #define MAX_PKT_BURST 32
  48
  49 /*
  50  * Configurable number of RX/TX ring descriptors
  51  */
  52 #define RTE_TEST_RX_DESC_DEFAULT 1024
  53 #define RTE_TEST_TX_DESC_DEFAULT 1024
  54
  55 #define INVALID_PORT_ID 0xFF
  56
  57 /* mask of enabled ports */
  58 static uint32_t enabled_port_mask;
  59 static uint16_t ports[RTE_MAX_ETHPORTS];
  60 static unsigned num_ports;
  61
  62 /* number of pools (if user does not specify any, 32 by default */
  63 static enum rte_eth_nb_pools num_pools = ETH_32_POOLS;
  64 static enum rte_eth_nb_tcs   num_tcs   = ETH_4_TCS;
  65 static uint16_t num_queues, num_vmdq_queues;
  66 static uint16_t vmdq_pool_base, vmdq_queue_base;
  67 static uint8_t rss_enable;
  68
  69 /* empty vmdq+dcb configuration structure. Filled in programatically */
  70 static const struct rte_eth_conf vmdq_dcb_conf_default = {
  71         .rxmode = {
  72                 .mq_mode        = ETH_MQ_RX_VMDQ_DCB,
  73                 .split_hdr_size = 0,
  74         },
  75         .txmode = {
  76                 .mq_mode = ETH_MQ_TX_VMDQ_DCB,
  77         },
  78         /*
  79          * should be overridden separately in code with
  80          * appropriate values
  81          */
  82         .rx_adv_conf = {
  83                 .vmdq_dcb_conf = {
  84                         .nb_queue_pools = ETH_32_POOLS,
  85                         .enable_default_pool = 0,
  86                         .default_pool = 0,
  87                         .nb_pool_maps = 0,
  88                         .pool_map = {{0, 0},},
  89                         .dcb_tc = {0},
  90                 },
  91                 .dcb_rx_conf = {
  92                                 .nb_tcs = ETH_4_TCS,
  93                                 /** Traffic class each UP mapped to. */
  94                                 .dcb_tc = {0},
  95                 },
  96                 .vmdq_rx_conf = {
  97                         .nb_queue_pools = ETH_32_POOLS,
  98                         .enable_default_pool = 0,
  99                         .default_pool = 0,
 100                         .nb_pool_maps = 0,
 101                         .pool_map = {{0, 0},},
 102                 },
 103         },
 104         .tx_adv_conf = {
 105                 .vmdq_dcb_tx_conf = {
 106                         .nb_queue_pools = ETH_32_POOLS,
 107                         .dcb_tc = {0},
 108                 },
 109         },
 110 };
 111
 112 /* array used for printing out statistics */
 113 volatile unsigned long rxPackets[MAX_QUEUES] = {0};
 114
 115 const uint16_t vlan_tags[] = {
 116         0,  1,  2,  3,  4,  5,  6,  7,
 117         8,  9, 10, 11,  12, 13, 14, 15,
 118         16, 17, 18, 19, 20, 21, 22, 23,
 119         24, 25, 26, 27, 28, 29, 30, 31
 120 };
 121
 122 const uint16_t num_vlans = RTE_DIM(vlan_tags);
 123 /* pool mac addr template, pool mac addr is like: 52 54 00 12 port# pool# */
 124 static struct rte_ether_addr pool_addr_template = {
 125         .addr_bytes = {0x52, 0x54, 0x00, 0x12, 0x00, 0x00}
 126 };
 127
 128 /* ethernet addresses of ports */
 129 static struct rte_ether_addr vmdq_ports_eth_addr[RTE_MAX_ETHPORTS];
 130
 131 /* Builds up the correct configuration for vmdq+dcb based on the vlan tags array
 132  * given above, and the number of traffic classes available for use. */
 133 static inline int
 134 get_eth_conf(struct rte_eth_conf *eth_conf)
 135 {
 136         struct rte_eth_vmdq_dcb_conf conf;
 137         struct rte_eth_vmdq_rx_conf  vmdq_conf;
 138         struct rte_eth_dcb_rx_conf   dcb_conf;
 139         struct rte_eth_vmdq_dcb_tx_conf tx_conf;
 140         uint8_t i;
 141
 142         conf.nb_queue_pools = (enum rte_eth_nb_pools)num_pools;
 143         vmdq_conf.nb_queue_pools = (enum rte_eth_nb_pools)num_pools;
 144         tx_conf.nb_queue_pools = (enum rte_eth_nb_pools)num_pools;
 145         conf.nb_pool_maps = num_pools;
 146         vmdq_conf.nb_pool_maps = num_pools;
 147         conf.enable_default_pool = 0;
 148         vmdq_conf.enable_default_pool = 0;
 149         conf.default_pool = 0; /* set explicit value, even if not used */
 150         vmdq_conf.default_pool = 0;
 151
 152         for (i = 0; i < conf.nb_pool_maps; i++) {
 153                 conf.pool_map[i].vlan_id = vlan_tags[i];
 154                 vmdq_conf.pool_map[i].vlan_id = vlan_tags[i];
 155                 conf.pool_map[i].pools = 1UL << i;
 156                 vmdq_conf.pool_map[i].pools = 1UL << i;
 157         }
 158         for (i = 0; i < ETH_DCB_NUM_USER_PRIORITIES; i++){
 159                 conf.dcb_tc[i] = i % num_tcs;
 160                 dcb_conf.dcb_tc[i] = i % num_tcs;
 161                 tx_conf.dcb_tc[i] = i % num_tcs;
 162         }
 163         dcb_conf.nb_tcs = (enum rte_eth_nb_tcs)num_tcs;
 164         (void)(rte_memcpy(eth_conf, &vmdq_dcb_conf_default, sizeof(*eth_conf)));
 165         (void)(rte_memcpy(&eth_conf->rx_adv_conf.vmdq_dcb_conf, &conf,
 166                           sizeof(conf)));
 167         (void)(rte_memcpy(&eth_conf->rx_adv_conf.dcb_rx_conf, &dcb_conf,
 168                           sizeof(dcb_conf)));
 169         (void)(rte_memcpy(&eth_conf->rx_adv_conf.vmdq_rx_conf, &vmdq_conf,
 170                           sizeof(vmdq_conf)));
 171         (void)(rte_memcpy(&eth_conf->tx_adv_conf.vmdq_dcb_tx_conf, &tx_conf,
 172                           sizeof(tx_conf)));
 173         if (rss_enable) {
 174                 eth_conf->rxmode.mq_mode = ETH_MQ_RX_VMDQ_DCB_RSS;
 175                 eth_conf->rx_adv_conf.rss_conf.rss_hf = ETH_RSS_IP |
 176                                                         ETH_RSS_UDP |
 177                                                         ETH_RSS_TCP |
 178                                                         ETH_RSS_SCTP;
 179         }
 180         return 0;
 181 }
 182
 183 /*
 184  * Initialises a given port using global settings and with the rx buffers
 185  * coming from the mbuf_pool passed as parameter
 186  */
 187 static inline int
 188 port_init(uint16_t port, struct rte_mempool *mbuf_pool)
 189 {
 190         struct rte_eth_dev_info dev_info;
 191         struct rte_eth_conf port_conf = {0};
 192         uint16_t rxRingSize = RTE_TEST_RX_DESC_DEFAULT;
 193         uint16_t txRingSize = RTE_TEST_TX_DESC_DEFAULT;
 194         int retval;
 195         uint16_t q;
 196         uint16_t queues_per_pool;
 197         uint32_t max_nb_pools;
 198         struct rte_eth_txconf txq_conf;
 199         uint64_t rss_hf_tmp;
 200
 201         /*
 202          * The max pool number from dev_info will be used to validate the pool
 203          * number specified in cmd line
 204          */
 205         rte_eth_dev_info_get(port, &dev_info);
 206         max_nb_pools = (uint32_t)dev_info.max_vmdq_pools;
 207         /*
 208          * We allow to process part of VMDQ pools specified by num_pools in
 209          * command line.
 210          */
 211         if (num_pools > max_nb_pools) {
 212                 printf("num_pools %d >max_nb_pools %d\n",
 213                         num_pools, max_nb_pools);
 214                 return -1;
 215         }
 216
 217         /*
 218          * NIC queues are divided into pf queues and vmdq queues.
 219          * There is assumption here all ports have the same configuration!
 220         */
 221         vmdq_queue_base = dev_info.vmdq_queue_base;
 222         vmdq_pool_base  = dev_info.vmdq_pool_base;
 223         printf("vmdq queue base: %d pool base %d\n",
 224                 vmdq_queue_base, vmdq_pool_base);
 225         if (vmdq_pool_base == 0) {
 226                 num_vmdq_queues = dev_info.max_rx_queues;
 227                 num_queues = dev_info.max_rx_queues;
 228                 if (num_tcs != num_vmdq_queues / num_pools) {
 229                         printf("nb_tcs %d is invalid considering with"
 230                                 " nb_pools %d, nb_tcs * nb_pools should = %d\n",
 231                                 num_tcs, num_pools, num_vmdq_queues);
 232                         return -1;
 233                 }
 234         } else {
 235                 queues_per_pool = dev_info.vmdq_queue_num /
 236                                   dev_info.max_vmdq_pools;
 237                 if (num_tcs > queues_per_pool) {
 238                         printf("num_tcs %d > num of queues per pool %d\n",
 239                                 num_tcs, queues_per_pool);
 240                         return -1;
 241                 }
 242                 num_vmdq_queues = num_pools * queues_per_pool;
 243                 num_queues = vmdq_queue_base + num_vmdq_queues;
 244                 printf("Configured vmdq pool num: %u,"
 245                         " each vmdq pool has %u queues\n",
 246                         num_pools, queues_per_pool);
 247         }
 248
 249         if (!rte_eth_dev_is_valid_port(port))
 250                 return -1;
 251
 252         retval = get_eth_conf(&port_conf);
 253         if (retval < 0)
 254                 return retval;
 255
 256         rte_eth_dev_info_get(port, &dev_info);
 257         if (dev_info.tx_offload_capa & DEV_TX_OFFLOAD_MBUF_FAST_FREE)
 258                 port_conf.txmode.offloads |=
 259                         DEV_TX_OFFLOAD_MBUF_FAST_FREE;
 260
 261         rss_hf_tmp = port_conf.rx_adv_conf.rss_conf.rss_hf;
 262         port_conf.rx_adv_conf.rss_conf.rss_hf &=
 263                 dev_info.flow_type_rss_offloads;
 264         if (port_conf.rx_adv_conf.rss_conf.rss_hf != rss_hf_tmp) {
 265                 printf("Port %u modified RSS hash function based on hardware support,"
 266                         "requested:%#"PRIx64" configured:%#"PRIx64"\n",
 267                         port,
 268                         rss_hf_tmp,
 269                         port_conf.rx_adv_conf.rss_conf.rss_hf);
 270         }
 271
 272         /*
 273          * Though in this example, all queues including pf queues are setup.
 274          * This is because VMDQ queues doesn't always start from zero, and the
 275          * PMD layer doesn't support selectively initialising part of rx/tx
 276          * queues.
 277          */
 278         retval = rte_eth_dev_configure(port, num_queues, num_queues, &port_conf);
 279         if (retval != 0)
 280                 return retval;
 281
 282         retval = rte_eth_dev_adjust_nb_rx_tx_desc(port, &rxRingSize,
 283                                 &txRingSize);
 284         if (retval != 0)
 285                 return retval;
 286         if (RTE_MAX(rxRingSize, txRingSize) >
 287             RTE_MAX(RTE_TEST_RX_DESC_DEFAULT, RTE_TEST_TX_DESC_DEFAULT)) {
 288                 printf("Mbuf pool has an insufficient size for port %u.\n",
 289                         port);
 290                 return -1;
 291         }
 292
 293         for (q = 0; q < num_queues; q++) {
 294                 retval = rte_eth_rx_queue_setup(port, q, rxRingSize,
 295                                         rte_eth_dev_socket_id(port),
 296                                         NULL,
 297                                         mbuf_pool);
 298                 if (retval < 0) {
 299                         printf("initialize rx queue %d failed\n", q);
 300                         return retval;
 301                 }
 302         }
 303
 304         txq_conf = dev_info.default_txconf;
 305         txq_conf.offloads = port_conf.txmode.offloads;
 306         for (q = 0; q < num_queues; q++) {
 307                 retval = rte_eth_tx_queue_setup(port, q, txRingSize,
 308                                         rte_eth_dev_socket_id(port),
 309                                         &txq_conf);
 310                 if (retval < 0) {
 311                         printf("initialize tx queue %d failed\n", q);
 312                         return retval;
 313                 }
 314         }
 315
 316         retval  = rte_eth_dev_start(port);
 317         if (retval < 0) {
 318                 printf("port %d start failed\n", port);
 319                 return retval;
 320         }
 321
 322         rte_eth_macaddr_get(port, &vmdq_ports_eth_addr[port]);
 323         printf("Port %u MAC: %02"PRIx8" %02"PRIx8" %02"PRIx8
 324                         " %02"PRIx8" %02"PRIx8" %02"PRIx8"\n",
 325                         (unsigned)port,
 326                         vmdq_ports_eth_addr[port].addr_bytes[0],
 327                         vmdq_ports_eth_addr[port].addr_bytes[1],
 328                         vmdq_ports_eth_addr[port].addr_bytes[2],
 329                         vmdq_ports_eth_addr[port].addr_bytes[3],
 330                         vmdq_ports_eth_addr[port].addr_bytes[4],
 331                         vmdq_ports_eth_addr[port].addr_bytes[5]);
 332
 333         /* Set mac for each pool.*/
 334         for (q = 0; q < num_pools; q++) {
 335                 struct rte_ether_addr mac;
 336
 337                 mac = pool_addr_template;
 338                 mac.addr_bytes[4] = port;
 339                 mac.addr_bytes[5] = q;
 340                 printf("Port %u vmdq pool %u set mac %02x:%02x:%02x:%02x:%02x:%02x\n",
 341                         port, q,
 342                         mac.addr_bytes[0], mac.addr_bytes[1],
 343                         mac.addr_bytes[2], mac.addr_bytes[3],
 344                         mac.addr_bytes[4], mac.addr_bytes[5]);
 345                 retval = rte_eth_dev_mac_addr_add(port, &mac,
 346                                 q + vmdq_pool_base);
 347                 if (retval) {
 348                         printf("mac addr add failed at pool %d\n", q);
 349                         return retval;
 350                 }
 351         }
 352
 353         return 0;
 354 }
 355
 356 /* Check num_pools parameter and set it if OK*/
 357 static int
 358 vmdq_parse_num_pools(const char *q_arg)
 359 {
 360         char *end = NULL;
 361         int n;
 362
 363         /* parse number string */
 364         n = strtol(q_arg, &end, 10);
 365         if ((q_arg[0] == '\0') || (end == NULL) || (*end != '\0'))
 366                 return -1;
 367         if (n != 16 && n != 32)
 368                 return -1;
 369         if (n == 16)
 370                 num_pools = ETH_16_POOLS;
 371         else
 372                 num_pools = ETH_32_POOLS;
 373
 374         return 0;
 375 }
 376
 377 /* Check num_tcs parameter and set it if OK*/
 378 static int
 379 vmdq_parse_num_tcs(const char *q_arg)
 380 {
 381         char *end = NULL;
 382         int n;
 383
 384         /* parse number string */
 385         n = strtol(q_arg, &end, 10);
 386         if ((q_arg[0] == '\0') || (end == NULL) || (*end != '\0'))
 387                 return -1;
 388
 389         if (n != 4 && n != 8)
 390                 return -1;
 391         if (n == 4)
 392                 num_tcs = ETH_4_TCS;
 393         else
 394                 num_tcs = ETH_8_TCS;
 395
 396         return 0;
 397 }
 398
 399 static int
 400 parse_portmask(const char *portmask)
 401 {
 402         char *end = NULL;
 403         unsigned long pm;
 404
 405         /* parse hexadecimal string */
 406         pm = strtoul(portmask, &end, 16);
 407         if ((portmask[0] == '\0') || (end == NULL) || (*end != '\0'))
 408                 return -1;
 409
 410         if (pm == 0)
 411                 return -1;
 412
 413         return pm;
 414 }
 415
 416 /* Display usage */
 417 static void
 418 vmdq_usage(const char *prgname)
 419 {
 420         printf("%s [EAL options] -- -p PORTMASK]\n"
 421         "  --nb-pools NP: number of pools (32 default, 16)\n"
 422         "  --nb-tcs NP: number of TCs (4 default, 8)\n"
 423         "  --enable-rss: enable RSS (disabled by default)\n",
 424                prgname);
 425 }
 426
 427 /*  Parse the argument (num_pools) given in the command line of the application */
 428 static int
 429 vmdq_parse_args(int argc, char **argv)
 430 {
 431         int opt;
 432         int option_index;
 433         unsigned i;
 434         const char *prgname = argv[0];
 435         static struct option long_option[] = {
 436                 {"nb-pools", required_argument, NULL, 0},
 437                 {"nb-tcs", required_argument, NULL, 0},
 438                 {"enable-rss", 0, NULL, 0},
 439                 {NULL, 0, 0, 0}
 440         };
 441
 442         /* Parse command line */
 443         while ((opt = getopt_long(argc, argv, "p:", long_option,
 444                 &option_index)) != EOF) {
 445                 switch (opt) {
 446                 /* portmask */
 447                 case 'p':
 448                         enabled_port_mask = parse_portmask(optarg);
 449                         if (enabled_port_mask == 0) {
 450                                 printf("invalid portmask\n");
 451                                 vmdq_usage(prgname);
 452                                 return -1;
 453                         }
 454                         break;
 455                 case 0:
 456                         if (!strcmp(long_option[option_index].name, "nb-pools")) {
 457                                 if (vmdq_parse_num_pools(optarg) == -1) {
 458                                         printf("invalid number of pools\n");
 459                                         return -1;
 460                                 }
 461                         }
 462
 463                         if (!strcmp(long_option[option_index].name, "nb-tcs")) {
 464                                 if (vmdq_parse_num_tcs(optarg) == -1) {
 465                                         printf("invalid number of tcs\n");
 466                                         return -1;
 467                                 }
 468                         }
 469
 470                         if (!strcmp(long_option[option_index].name, "enable-rss"))
 471                                 rss_enable = 1;
 472                         break;
 473
 474                 default:
 475                         vmdq_usage(prgname);
 476                         return -1;
 477                 }
 478         }
 479
 480         for (i = 0; i < RTE_MAX_ETHPORTS; i++) {
 481                 if (enabled_port_mask & (1 << i))
 482                         ports[num_ports++] = (uint8_t)i;
 483         }
 484
 485         if (num_ports < 2 || num_ports % 2) {
 486                 printf("Current enabled port number is %u,"
 487                         " but it should be even and at least 2\n", num_ports);
 488                 return -1;
 489         }
 490
 491         return 0;
 492 }
 493
 494 static void
 495 update_mac_address(struct rte_mbuf *m, unsigned dst_port)
 496 {
 497         struct rte_ether_hdr *eth;
 498         void *tmp;
 499
 500         eth = rte_pktmbuf_mtod(m, struct rte_ether_hdr *);
 501
 502         /* 02:00:00:00:00:xx */
 503         tmp = &eth->d_addr.addr_bytes[0];
 504         *((uint64_t *)tmp) = 0x000000000002 + ((uint64_t)dst_port << 40);
 505
 506         /* src addr */
 507         ether_addr_copy(&vmdq_ports_eth_addr[dst_port], &eth->s_addr);
 508 }
 509
 510 /* When we receive a HUP signal, print out our stats */
 511 static void
 512 sighup_handler(int signum)
 513 {
 514         unsigned q = vmdq_queue_base;
 515
 516         for (; q < num_queues; q++) {
 517                 if (q % (num_vmdq_queues / num_pools) == 0)
 518                         printf("\nPool %u: ", (q - vmdq_queue_base) /
 519                                               (num_vmdq_queues / num_pools));
 520                 printf("%lu ", rxPackets[q]);
 521         }
 522         printf("\nFinished handling signal %d\n", signum);
 523 }
 524
 525 /*
 526  * Main thread that does the work, reading from INPUT_PORT
 527  * and writing to OUTPUT_PORT
 528  */
 529 static int
 530 lcore_main(void *arg)
 531 {
 532         const uintptr_t core_num = (uintptr_t)arg;
 533         const unsigned num_cores = rte_lcore_count();
 534         uint16_t startQueue, endQueue;
 535         uint16_t q, i, p;
 536         const uint16_t quot = (uint16_t)(num_vmdq_queues / num_cores);
 537         const uint16_t remainder = (uint16_t)(num_vmdq_queues % num_cores);
 538
 539
 540         if (remainder) {
 541                 if (core_num < remainder) {
 542                         startQueue = (uint16_t)(core_num * (quot + 1));
 543                         endQueue = (uint16_t)(startQueue + quot + 1);
 544                 } else {
 545                         startQueue = (uint16_t)(core_num * quot + remainder);
 546                         endQueue = (uint16_t)(startQueue + quot);
 547                 }
 548         } else {
 549                 startQueue = (uint16_t)(core_num * quot);
 550                 endQueue = (uint16_t)(startQueue + quot);
 551         }
 552
 553         /* vmdq queue idx doesn't always start from zero.*/
 554         startQueue += vmdq_queue_base;
 555         endQueue   += vmdq_queue_base;
 556         printf("Core %u(lcore %u) reading queues %i-%i\n", (unsigned)core_num,
 557                rte_lcore_id(), startQueue, endQueue - 1);
 558
 559         if (startQueue == endQueue) {
 560                 printf("lcore %u has nothing to do\n", (unsigned)core_num);
 561                 return 0;
 562         }
 563
 564         for (;;) {
 565                 struct rte_mbuf *buf[MAX_PKT_BURST];
 566                 const uint16_t buf_size = sizeof(buf) / sizeof(buf[0]);
 567                 for (p = 0; p < num_ports; p++) {
 568                         const uint8_t src = ports[p];
 569                         const uint8_t dst = ports[p ^ 1]; /* 0 <-> 1, 2 <-> 3 etc */
 570
 571                         if ((src == INVALID_PORT_ID) || (dst == INVALID_PORT_ID))
 572                                 continue;
 573
 574                         for (q = startQueue; q < endQueue; q++) {
 575                                 const uint16_t rxCount = rte_eth_rx_burst(src,
 576                                         q, buf, buf_size);
 577
 578                                 if (unlikely(rxCount == 0))
 579                                         continue;
 580
 581                                 rxPackets[q] += rxCount;
 582
 583                                 for (i = 0; i < rxCount; i++)
 584                                         update_mac_address(buf[i], dst);
 585
 586                                 const uint16_t txCount = rte_eth_tx_burst(dst,
 587                                         q, buf, rxCount);
 588                                 if (txCount != rxCount) {
 589                                         for (i = txCount; i < rxCount; i++)
 590                                                 rte_pktmbuf_free(buf[i]);
 591                                 }
 592                         }
 593                 }
 594         }
 595 }
 596
 597 /*
 598  * Update the global var NUM_PORTS and array PORTS according to system ports number
 599  * and return valid ports number
 600  */
 601 static unsigned check_ports_num(unsigned nb_ports)
 602 {
 603         unsigned valid_num_ports = num_ports;
 604         unsigned portid;
 605
 606         if (num_ports > nb_ports) {
 607                 printf("\nSpecified port number(%u) exceeds total system port number(%u)\n",
 608                         num_ports, nb_ports);
 609                 num_ports = nb_ports;
 610         }
 611
 612         for (portid = 0; portid < num_ports; portid++) {
 613                 if (!rte_eth_dev_is_valid_port(ports[portid])) {
 614                         printf("\nSpecified port ID(%u) is not valid\n",
 615                                 ports[portid]);
 616                         ports[portid] = INVALID_PORT_ID;
 617                         valid_num_ports--;
 618                 }
 619         }
 620         return valid_num_ports;
 621 }
 622
 623
 624 /* Main function, does initialisation and calls the per-lcore functions */
 625 int
 626 main(int argc, char *argv[])
 627 {
 628         unsigned cores;
 629         struct rte_mempool *mbuf_pool;
 630         unsigned lcore_id;
 631         uintptr_t i;
 632         int ret;
 633         unsigned nb_ports, valid_num_ports;
 634         uint16_t portid;
 635
 636         signal(SIGHUP, sighup_handler);
 637
 638         /* init EAL */
 639         ret = rte_eal_init(argc, argv);
 640         if (ret < 0)
 641                 rte_exit(EXIT_FAILURE, "Error with EAL initialization\n");
 642         argc -= ret;
 643         argv += ret;
 644
 645         /* parse app arguments */
 646         ret = vmdq_parse_args(argc, argv);
 647         if (ret < 0)
 648                 rte_exit(EXIT_FAILURE, "Invalid VMDQ argument\n");
 649
 650         cores = rte_lcore_count();
 651         if ((cores & (cores - 1)) != 0 || cores > RTE_MAX_LCORE) {
 652                 rte_exit(EXIT_FAILURE,"This program can only run on an even"
 653                                 " number of cores(1-%d)\n\n", RTE_MAX_LCORE);
 654         }
 655
 656         nb_ports = rte_eth_dev_count_avail();
 657
 658         /*
 659          * Update the global var NUM_PORTS and global array PORTS
 660          * and get value of var VALID_NUM_PORTS according to system ports number
 661          */
 662         valid_num_ports = check_ports_num(nb_ports);
 663
 664         if (valid_num_ports < 2 || valid_num_ports % 2) {
 665                 printf("Current valid ports number is %u\n", valid_num_ports);
 666                 rte_exit(EXIT_FAILURE, "Error with valid ports number is not even or less than 2\n");
 667         }
 668
 669         mbuf_pool = rte_pktmbuf_pool_create("MBUF_POOL",
 670                 NUM_MBUFS_PER_PORT * nb_ports, MBUF_CACHE_SIZE,
 671                 0, RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id());
 672         if (mbuf_pool == NULL)
 673                 rte_exit(EXIT_FAILURE, "Cannot create mbuf pool\n");
 674
 675         /* initialize all ports */
 676         RTE_ETH_FOREACH_DEV(portid) {
 677                 /* skip ports that are not enabled */
 678                 if ((enabled_port_mask & (1 << portid)) == 0) {
 679                         printf("\nSkipping disabled port %d\n", portid);
 680                         continue;
 681                 }
 682                 if (port_init(portid, mbuf_pool) != 0)
 683                         rte_exit(EXIT_FAILURE, "Cannot initialize network ports\n");
 684         }
 685
 686         /* call lcore_main() on every slave lcore */
 687         i = 0;
 688         RTE_LCORE_FOREACH_SLAVE(lcore_id) {
 689                 rte_eal_remote_launch(lcore_main, (void*)i++, lcore_id);
 690         }
 691         /* call on master too */
 692         (void) lcore_main((void*)i);
 693
 694         return 0;
 695 }