examples/l2fwd-ivshmem/host/host.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2010-2014 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 <unistd.h>
  35 #include <stdlib.h>
  36 #include <stdio.h>
  37 #include <string.h>
  38 #include <limits.h>
  39 #include <inttypes.h>
  40 #include <getopt.h>
  41 #include <signal.h>
  42
  43 #include <rte_eal.h>
  44 #include <rte_cycles.h>
  45 #include <rte_eal_memconfig.h>
  46 #include <rte_debug.h>
  47 #include <rte_ether.h>
  48 #include <rte_ethdev.h>
  49 #include <rte_string_fns.h>
  50 #include <rte_ivshmem.h>
  51 #include <rte_ring.h>
  52 #include <rte_mempool.h>
  53 #include <rte_mbuf.h>
  54
  55 #include "../include/common.h"
  56
  57 /*
  58  * Configurable number of RX/TX ring descriptors
  59  */
  60 #define RTE_TEST_RX_DESC_DEFAULT 128
  61 #define RTE_TEST_TX_DESC_DEFAULT 512
  62 static uint16_t nb_rxd = RTE_TEST_RX_DESC_DEFAULT;
  63 static uint16_t nb_txd = RTE_TEST_TX_DESC_DEFAULT;
  64
  65 #define BURST_TX_DRAIN_US 100 /* TX drain every ~100us */
  66
  67 /* mask of enabled ports */
  68 static uint32_t l2fwd_ivshmem_enabled_port_mask = 0;
  69
  70 static struct ether_addr l2fwd_ivshmem_ports_eth_addr[RTE_MAX_ETHPORTS];
  71
  72 #define NB_MBUF   8192
  73
  74 #define MAX_RX_QUEUE_PER_LCORE 16
  75 #define MAX_TX_QUEUE_PER_PORT 16
  76 struct lcore_queue_conf {
  77         unsigned n_rx_port;
  78         unsigned rx_port_list[MAX_RX_QUEUE_PER_LCORE];
  79         struct vm_port_param * port_param[MAX_RX_QUEUE_PER_LCORE];
  80         struct mbuf_table tx_mbufs[RTE_MAX_ETHPORTS];
  81         struct mbuf_table rx_mbufs[RTE_MAX_ETHPORTS];
  82 } __rte_cache_aligned;
  83 static struct lcore_queue_conf lcore_queue_conf[RTE_MAX_LCORE];
  84
  85 static const struct rte_eth_conf port_conf = {
  86         .rxmode = {
  87                 .split_hdr_size = 0,
  88                 .header_split   = 0, /**< Header Split disabled */
  89                 .hw_ip_checksum = 0, /**< IP checksum offload disabled */
  90                 .hw_vlan_filter = 0, /**< VLAN filtering disabled */
  91                 .jumbo_frame    = 0, /**< Jumbo Frame Support disabled */
  92                 .hw_strip_crc   = 0, /**< CRC stripped by hardware */
  93         },
  94         .txmode = {
  95                 .mq_mode = ETH_MQ_TX_NONE,
  96         },
  97 };
  98
  99 #define METADATA_NAME "l2fwd_ivshmem"
 100 #define CMDLINE_OPT_FWD_CONF "fwd-conf"
 101
 102 #define QEMU_CMD_FMT "/tmp/ivshmem_qemu_cmdline_%s"
 103
 104 struct port_statistics port_statistics[RTE_MAX_ETHPORTS];
 105
 106 struct rte_mempool * l2fwd_ivshmem_pktmbuf_pool = NULL;
 107
 108 /* Print out statistics on packets dropped */
 109 static void
 110 print_stats(void)
 111 {
 112         uint64_t total_packets_dropped, total_packets_tx, total_packets_rx;
 113         uint64_t total_vm_packets_dropped, total_vm_packets_tx, total_vm_packets_rx;
 114         unsigned portid;
 115
 116         total_packets_dropped = 0;
 117         total_packets_tx = 0;
 118         total_packets_rx = 0;
 119         total_vm_packets_tx = 0;
 120         total_vm_packets_rx = 0;
 121
 122         const char clr[] = { 27, '[', '2', 'J', '\0' };
 123         const char topLeft[] = { 27, '[', '1', ';', '1', 'H','\0' };
 124
 125                 /* Clear screen and move to top left */
 126         printf("%s%s", clr, topLeft);
 127
 128         printf("\nPort statistics ====================================");
 129
 130         for (portid = 0; portid < RTE_MAX_ETHPORTS; portid++) {
 131                 /* skip disabled ports */
 132                 if ((l2fwd_ivshmem_enabled_port_mask & (1 << portid)) == 0)
 133                         continue;
 134                 printf("\nStatistics for port %u ------------------------------"
 135                            "\nPackets sent: %24"PRIu64
 136                            "\nPackets received: %20"PRIu64
 137                            "\nPackets dropped: %21"PRIu64,
 138                            portid,
 139                            port_statistics[portid].tx,
 140                            port_statistics[portid].rx,
 141                            port_statistics[portid].dropped);
 142
 143                 total_packets_dropped += port_statistics[portid].dropped;
 144                 total_packets_tx += port_statistics[portid].tx;
 145                 total_packets_rx += port_statistics[portid].rx;
 146         }
 147
 148         printf("\nVM statistics ======================================");
 149         for (portid = 0; portid < ctrl->nb_ports; portid++) {
 150                 printf("\nStatistics for port %u ------------------------------"
 151                            "\nPackets sent: %24"PRIu64
 152                            "\nPackets received: %20"PRIu64,
 153                            portid,
 154                            ctrl->vm_ports[portid].stats.tx,
 155                            ctrl->vm_ports[portid].stats.rx);
 156
 157                 total_vm_packets_dropped += ctrl->vm_ports[portid].stats.dropped;
 158                 total_vm_packets_tx += ctrl->vm_ports[portid].stats.tx;
 159                 total_vm_packets_rx += ctrl->vm_ports[portid].stats.rx;
 160         }
 161         printf("\nAggregate statistics ==============================="
 162                            "\nTotal packets sent: %18"PRIu64
 163                            "\nTotal packets received: %14"PRIu64
 164                            "\nTotal packets dropped: %15"PRIu64
 165                            "\nTotal VM packets sent: %15"PRIu64
 166                            "\nTotal VM packets received: %11"PRIu64,
 167                            total_packets_tx,
 168                            total_packets_rx,
 169                            total_packets_dropped,
 170                            total_vm_packets_tx,
 171                            total_vm_packets_rx);
 172         printf("\n====================================================\n");
 173 }
 174
 175 static int
 176 print_to_file(const char *cmdline, const char *config_name)
 177 {
 178         FILE *file;
 179         char path[PATH_MAX];
 180
 181         snprintf(path, sizeof(path), QEMU_CMD_FMT, config_name);
 182         file = fopen(path, "w");
 183         if (file == NULL) {
 184                 RTE_LOG(ERR, L2FWD_IVSHMEM, "Could not open '%s' \n", path);
 185                 return -1;
 186         }
 187
 188         RTE_LOG(DEBUG, L2FWD_IVSHMEM, "QEMU command line for config '%s': %s \n",
 189                         config_name, cmdline);
 190
 191         fprintf(file, "%s\n", cmdline);
 192         fclose(file);
 193         return 0;
 194 }
 195
 196 static int
 197 generate_ivshmem_cmdline(const char *config_name)
 198 {
 199         char cmdline[PATH_MAX];
 200         if (rte_ivshmem_metadata_cmdline_generate(cmdline, sizeof(cmdline),
 201                         config_name) < 0)
 202                 return -1;
 203
 204         if (print_to_file(cmdline, config_name) < 0)
 205                 return -1;
 206
 207         rte_ivshmem_metadata_dump(stdout, config_name);
 208         return 0;
 209 }
 210
 211 /* display usage */
 212 static void
 213 l2fwd_ivshmem_usage(const char *prgname)
 214 {
 215         printf("%s [EAL options] -- -p PORTMASK [-q NQ -T PERIOD]\n"
 216                    "  -p PORTMASK: hexadecimal bitmask of ports to configure\n"
 217                    "  -q NQ: number of queue (=ports) per lcore (default is 1)\n"
 218                    "  -T PERIOD: statistics will be refreshed each PERIOD seconds "
 219                        "(0 to disable, 10 default, 86400 maximum)\n",
 220                prgname);
 221 }
 222
 223 static unsigned int
 224 l2fwd_ivshmem_parse_nqueue(const char *q_arg)
 225 {
 226         char *end = NULL;
 227         unsigned long n;
 228
 229         /* parse hexadecimal string */
 230         n = strtoul(q_arg, &end, 10);
 231         if ((q_arg[0] == '\0') || (end == NULL) || (*end != '\0'))
 232                 return 0;
 233         if (n == 0)
 234                 return 0;
 235         if (n >= MAX_RX_QUEUE_PER_LCORE)
 236                 return 0;
 237
 238         return n;
 239 }
 240
 241 static int
 242 l2fwd_ivshmem_parse_portmask(const char *portmask)
 243 {
 244         char *end = NULL;
 245         unsigned long pm;
 246
 247         /* parse hexadecimal string */
 248         pm = strtoul(portmask, &end, 16);
 249         if ((portmask[0] == '\0') || (end == NULL) || (*end != '\0'))
 250                 return -1;
 251
 252         if (pm == 0)
 253                 return -1;
 254
 255         return pm;
 256 }
 257
 258 static int
 259 l2fwd_ivshmem_parse_timer_period(const char *q_arg)
 260 {
 261         char *end = NULL;
 262         int n;
 263
 264         /* parse number string */
 265         n = strtol(q_arg, &end, 10);
 266         if ((q_arg[0] == '\0') || (end == NULL) || (*end != '\0'))
 267                 return -1;
 268         if (n >= MAX_TIMER_PERIOD)
 269                 return -1;
 270
 271         return n;
 272 }
 273
 274 /* Parse the argument given in the command line of the application */
 275 static int
 276 l2fwd_ivshmem_parse_args(int argc, char **argv)
 277 {
 278         int opt, ret;
 279         char **argvopt;
 280         int option_index;
 281         char *prgname = argv[0];
 282         static struct option lgopts[] = {
 283                         {CMDLINE_OPT_FWD_CONF, 1, 0, 0},
 284                 {NULL, 0, 0, 0}
 285         };
 286
 287         argvopt = argv;
 288
 289         while ((opt = getopt_long(argc, argvopt, "q:p:T:",
 290                                   lgopts, &option_index)) != EOF) {
 291
 292                 switch (opt) {
 293                 /* portmask */
 294                 case 'p':
 295                         l2fwd_ivshmem_enabled_port_mask = l2fwd_ivshmem_parse_portmask(optarg);
 296                         if (l2fwd_ivshmem_enabled_port_mask == 0) {
 297                                 printf("invalid portmask\n");
 298                                 l2fwd_ivshmem_usage(prgname);
 299                                 return -1;
 300                         }
 301                         break;
 302
 303                 /* nqueue */
 304                 case 'q':
 305                         l2fwd_ivshmem_rx_queue_per_lcore = l2fwd_ivshmem_parse_nqueue(optarg);
 306                         if (l2fwd_ivshmem_rx_queue_per_lcore == 0) {
 307                                 printf("invalid queue number\n");
 308                                 l2fwd_ivshmem_usage(prgname);
 309                                 return -1;
 310                         }
 311                         break;
 312
 313                 /* timer period */
 314                 case 'T':
 315                         timer_period = l2fwd_ivshmem_parse_timer_period(optarg) * 1000 * TIMER_MILLISECOND;
 316                         if (timer_period < 0) {
 317                                 printf("invalid timer period\n");
 318                                 l2fwd_ivshmem_usage(prgname);
 319                                 return -1;
 320                         }
 321                         break;
 322
 323                 /* long options */
 324                 case 0:
 325                         l2fwd_ivshmem_usage(prgname);
 326                         return -1;
 327
 328                 default:
 329                         l2fwd_ivshmem_usage(prgname);
 330                         return -1;
 331                 }
 332         }
 333
 334         if (optind >= 0)
 335                 argv[optind-1] = prgname;
 336
 337         ret = optind-1;
 338         optind = 0; /* reset getopt lib */
 339         return ret;
 340 }
 341
 342 /* Check the link status of all ports in up to 9s, and print them finally */
 343 static void
 344 check_all_ports_link_status(uint8_t port_num, uint32_t port_mask)
 345 {
 346 #define CHECK_INTERVAL 100 /* 100ms */
 347 #define MAX_CHECK_TIME 90 /* 9s (90 * 100ms) in total */
 348         uint8_t portid, count, all_ports_up, print_flag = 0;
 349         struct rte_eth_link link;
 350
 351         printf("\nChecking link status");
 352         fflush(stdout);
 353         for (count = 0; count <= MAX_CHECK_TIME; count++) {
 354                 all_ports_up = 1;
 355                 for (portid = 0; portid < port_num; portid++) {
 356                         if ((port_mask & (1 << portid)) == 0)
 357                                 continue;
 358                         memset(&link, 0, sizeof(link));
 359                         rte_eth_link_get_nowait(portid, &link);
 360                         /* print link status if flag set */
 361                         if (print_flag == 1) {
 362                                 if (link.link_status)
 363                                         printf("Port %d Link Up - speed %u "
 364                                                 "Mbps - %s\n", (uint8_t)portid,
 365                                                 (unsigned)link.link_speed,
 366                                 (link.link_duplex == ETH_LINK_FULL_DUPLEX) ?
 367                                         ("full-duplex") : ("half-duplex\n"));
 368                                 else
 369                                         printf("Port %d Link Down\n",
 370                                                 (uint8_t)portid);
 371                                 continue;
 372                         }
 373                         /* clear all_ports_up flag if any link down */
 374                         if (link.link_status == ETH_LINK_DOWN) {
 375                                 all_ports_up = 0;
 376                                 break;
 377                         }
 378                 }
 379                 /* after finally printing all link status, get out */
 380                 if (print_flag == 1)
 381                         break;
 382
 383                 if (all_ports_up == 0) {
 384                         printf(".");
 385                         fflush(stdout);
 386                         rte_delay_ms(CHECK_INTERVAL);
 387                 }
 388
 389                 /* set the print_flag if all ports up or timeout */
 390                 if (all_ports_up == 1 || count == (MAX_CHECK_TIME - 1)) {
 391                         print_flag = 1;
 392                         printf("done\n");
 393                 }
 394         }
 395 }
 396
 397 /* Send the burst of packets on an output interface */
 398 static int
 399 l2fwd_ivshmem_send_burst(struct lcore_queue_conf *qconf, unsigned n, uint8_t port)
 400 {
 401         struct rte_mbuf **m_table;
 402         unsigned ret;
 403         unsigned queueid =0;
 404
 405         m_table = (struct rte_mbuf **)qconf->tx_mbufs[port].m_table;
 406
 407         ret = rte_eth_tx_burst(port, (uint16_t) queueid, m_table, (uint16_t) n);
 408         port_statistics[port].tx += ret;
 409         if (unlikely(ret < n)) {
 410                 port_statistics[port].dropped += (n - ret);
 411                 do {
 412                         rte_pktmbuf_free(m_table[ret]);
 413                 } while (++ret < n);
 414         }
 415
 416         return 0;
 417 }
 418
 419 /* Enqueue packets for TX and prepare them to be sent on the network */
 420 static int
 421 l2fwd_ivshmem_send_packet(struct rte_mbuf *m, uint8_t port)
 422 {
 423         unsigned lcore_id, len;
 424         struct lcore_queue_conf *qconf;
 425
 426         lcore_id = rte_lcore_id();
 427
 428         qconf = &lcore_queue_conf[lcore_id];
 429         len = qconf->tx_mbufs[port].len;
 430         qconf->tx_mbufs[port].m_table[len] = m;
 431         len++;
 432
 433         /* enough pkts to be sent */
 434         if (unlikely(len == MAX_PKT_BURST)) {
 435                 l2fwd_ivshmem_send_burst(qconf, MAX_PKT_BURST, port);
 436                 len = 0;
 437         }
 438
 439         qconf->tx_mbufs[port].len = len;
 440         return 0;
 441 }
 442
 443 static int
 444 l2fwd_ivshmem_receive_burst(struct lcore_queue_conf *qconf, unsigned portid,
 445                 unsigned vm_port)
 446 {
 447         struct rte_mbuf ** m;
 448         struct rte_ring * rx;
 449         unsigned len, pkt_idx;
 450
 451         m = qconf->rx_mbufs[portid].m_table;
 452         len = qconf->rx_mbufs[portid].len;
 453         rx = qconf->port_param[vm_port]->rx_ring;
 454
 455         /* if enqueueing failed, ring is probably full, so drop the packets */
 456         if (rte_ring_enqueue_bulk(rx, (void**) m, len) < 0) {
 457                 port_statistics[portid].dropped += len;
 458
 459                 pkt_idx = 0;
 460                 do {
 461                         rte_pktmbuf_free(m[pkt_idx]);
 462                 } while (++pkt_idx < len);
 463         }
 464         else
 465                 /* increment rx stats by however many packets we managed to receive */
 466                 port_statistics[portid].rx += len;
 467
 468         return 0;
 469 }
 470
 471 /* Enqueue packets for RX and prepare them to be sent to VM */
 472 static int
 473 l2fwd_ivshmem_receive_packets(struct rte_mbuf ** m, unsigned n, unsigned portid,
 474                 unsigned vm_port)
 475 {
 476         unsigned lcore_id, len, pkt_idx;
 477         struct lcore_queue_conf *qconf;
 478
 479         lcore_id = rte_lcore_id();
 480
 481         qconf = &lcore_queue_conf[lcore_id];
 482
 483         len = qconf->rx_mbufs[portid].len;
 484         pkt_idx = 0;
 485
 486         /* enqueue packets */
 487         while (pkt_idx < n && len < MAX_PKT_BURST * 2) {
 488                 qconf->rx_mbufs[portid].m_table[len++] = m[pkt_idx++];
 489         }
 490
 491         /* increment queue len by however many packets we managed to receive */
 492         qconf->rx_mbufs[portid].len += pkt_idx;
 493
 494         /* drop the unreceived packets */
 495         if (unlikely(pkt_idx < n)) {
 496                 port_statistics[portid].dropped += n - pkt_idx;
 497                 do {
 498                         rte_pktmbuf_free(m[pkt_idx]);
 499                 } while (++pkt_idx < n);
 500         }
 501
 502         /* drain the queue halfway through the maximum capacity */
 503         if (unlikely(qconf->rx_mbufs[portid].len >= MAX_PKT_BURST))
 504                 l2fwd_ivshmem_receive_burst(qconf, portid, vm_port);
 505
 506         return 0;
 507 }
 508
 509 /* loop for host forwarding mode.
 510  * the data flow is as follows:
 511  *  1) get packets from TX queue and send it out from a given port
 512  *  2) RX packets from given port and enqueue them on RX ring
 513  *  3) dequeue packets from TX ring and put them on TX queue for a given port
 514  */
 515 static void
 516 fwd_loop(void)
 517 {
 518         struct rte_mbuf *pkts_burst[MAX_PKT_BURST * 2];
 519         struct rte_mbuf *m;
 520         unsigned lcore_id;
 521         uint64_t prev_tsc, diff_tsc, cur_tsc, timer_tsc;
 522         unsigned i, j, portid, nb_rx;
 523         struct lcore_queue_conf *qconf;
 524         struct rte_ring *tx;
 525         const uint64_t drain_tsc = (rte_get_tsc_hz() + US_PER_S - 1) / US_PER_S * BURST_TX_DRAIN_US;
 526
 527         prev_tsc = 0;
 528         timer_tsc = 0;
 529
 530         lcore_id = rte_lcore_id();
 531         qconf = &lcore_queue_conf[lcore_id];
 532
 533         if (qconf->n_rx_port == 0) {
 534                 RTE_LOG(INFO, L2FWD_IVSHMEM, "lcore %u has nothing to do\n", lcore_id);
 535                 return;
 536         }
 537
 538         RTE_LOG(INFO, L2FWD_IVSHMEM, "entering main loop on lcore %u\n", lcore_id);
 539
 540         for (i = 0; i < qconf->n_rx_port; i++) {
 541
 542                 portid = qconf->rx_port_list[i];
 543                 RTE_LOG(INFO, L2FWD_IVSHMEM, " -- lcoreid=%u portid=%u\n", lcore_id,
 544                         portid);
 545         }
 546
 547         while (ctrl->state == STATE_FWD) {
 548
 549                 cur_tsc = rte_rdtsc();
 550
 551                 /*
 552                  * Burst queue drain
 553                  */
 554                 diff_tsc = cur_tsc - prev_tsc;
 555                 if (unlikely(diff_tsc > drain_tsc)) {
 556
 557                         /*
 558                          * TX
 559                          */
 560                         for (portid = 0; portid < RTE_MAX_ETHPORTS; portid++) {
 561                                 if (qconf->tx_mbufs[portid].len == 0)
 562                                         continue;
 563                                 l2fwd_ivshmem_send_burst(qconf,
 564                                                  qconf->tx_mbufs[portid].len,
 565                                                  (uint8_t) portid);
 566                                 qconf->tx_mbufs[portid].len = 0;
 567                         }
 568
 569                         /*
 570                          * RX
 571                          */
 572                         for (i = 0; i < qconf->n_rx_port; i++) {
 573                                 portid = qconf->rx_port_list[i];
 574                                 if (qconf->rx_mbufs[portid].len == 0)
 575                                         continue;
 576                                 l2fwd_ivshmem_receive_burst(qconf, portid, i);
 577                                 qconf->rx_mbufs[portid].len = 0;
 578                         }
 579
 580                         /* if timer is enabled */
 581                         if (timer_period > 0) {
 582
 583                                 /* advance the timer */
 584                                 timer_tsc += diff_tsc;
 585
 586                                 /* if timer has reached its timeout */
 587                                 if (unlikely(timer_tsc >= (uint64_t) timer_period)) {
 588
 589                                         /* do this only on master core */
 590                                         if (lcore_id == rte_get_master_lcore()) {
 591                                                 print_stats();
 592                                                 /* reset the timer */
 593                                                 timer_tsc = 0;
 594                                         }
 595                                 }
 596                         }
 597
 598                         prev_tsc = cur_tsc;
 599                 }
 600
 601                 /*
 602                  * packet RX and forwarding
 603                  */
 604                 for (i = 0; i < qconf->n_rx_port; i++) {
 605
 606                         /* RX packets from port and put them on RX ring */
 607                         portid = qconf->rx_port_list[i];
 608                         nb_rx = rte_eth_rx_burst((uint8_t) portid, 0,
 609                                                  pkts_burst, MAX_PKT_BURST);
 610
 611                         if (nb_rx != 0)
 612                                 l2fwd_ivshmem_receive_packets(pkts_burst, nb_rx, portid, i);
 613
 614                         /* dequeue packets from TX ring and send them to TX queue */
 615                         tx = qconf->port_param[i]->tx_ring;
 616
 617                         nb_rx = rte_ring_count(tx);
 618
 619                         nb_rx = RTE_MIN(nb_rx, (unsigned) MAX_PKT_BURST);
 620
 621                         if (nb_rx == 0)
 622                                 continue;
 623
 624                         /* should not happen */
 625                         if (unlikely(rte_ring_dequeue_bulk(tx, (void**) pkts_burst, nb_rx) < 0)) {
 626                                 ctrl->state = STATE_FAIL;
 627                                 return;
 628                         }
 629
 630                         for (j = 0; j < nb_rx; j++) {
 631                                 m = pkts_burst[j];
 632                                 l2fwd_ivshmem_send_packet(m, portid);
 633                         }
 634                 }
 635         }
 636 }
 637
 638 static int
 639 l2fwd_ivshmem_launch_one_lcore(__attribute__((unused)) void *dummy)
 640 {
 641         fwd_loop();
 642         return 0;
 643 }
 644
 645 int main(int argc, char **argv)
 646 {
 647         char name[RTE_RING_NAMESIZE];
 648         struct rte_ring *r;
 649         struct lcore_queue_conf *qconf;
 650         struct rte_eth_dev_info dev_info;
 651         uint8_t portid, port_nr;
 652         uint8_t nb_ports, nb_ports_available;
 653         uint8_t nb_ports_in_mask;
 654         int ret;
 655         unsigned lcore_id, rx_lcore_id;
 656
 657         /* init EAL */
 658         ret = rte_eal_init(argc, argv);
 659         if (ret < 0)
 660                 rte_exit(EXIT_FAILURE, "Invalid EAL arguments\n");
 661         argc -= ret;
 662         argv += ret;
 663
 664         /* parse application arguments (after the EAL ones) */
 665         ret = l2fwd_ivshmem_parse_args(argc, argv);
 666         if (ret < 0)
 667                 rte_exit(EXIT_FAILURE, "Invalid l2fwd-ivshmem arguments\n");
 668
 669         /* create a shared mbuf pool */
 670         l2fwd_ivshmem_pktmbuf_pool =
 671                 rte_pktmbuf_pool_create(MBUF_MP_NAME, NB_MBUF, 32,
 672                         0, RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id());
 673         if (l2fwd_ivshmem_pktmbuf_pool == NULL)
 674                 rte_exit(EXIT_FAILURE, "Cannot init mbuf pool\n");
 675
 676         nb_ports = rte_eth_dev_count();
 677         if (nb_ports == 0)
 678                 rte_exit(EXIT_FAILURE, "No Ethernet ports - bye\n");
 679
 680         /*
 681          * reserve memzone to communicate with VMs - we cannot use rte_malloc here
 682          * because while it is technically possible, it is a very bad idea to share
 683          * the heap between two primary processes.
 684          */
 685         ctrl_mz = rte_memzone_reserve(CTRL_MZ_NAME, sizeof(struct ivshmem_ctrl),
 686                         SOCKET_ID_ANY, 0);
 687         if (ctrl_mz == NULL)
 688                 rte_exit(EXIT_FAILURE, "Cannot reserve control memzone\n");
 689         ctrl = (struct ivshmem_ctrl*) ctrl_mz->addr;
 690
 691         memset(ctrl, 0, sizeof(struct ivshmem_ctrl));
 692
 693         /*
 694          * Each port is assigned an output port.
 695          */
 696         nb_ports_in_mask = 0;
 697         for (portid = 0; portid < nb_ports; portid++) {
 698                 /* skip ports that are not enabled */
 699                 if ((l2fwd_ivshmem_enabled_port_mask & (1 << portid)) == 0)
 700                         continue;
 701                 if (portid % 2) {
 702                         ctrl->vm_ports[nb_ports_in_mask].dst = &ctrl->vm_ports[nb_ports_in_mask-1];
 703                         ctrl->vm_ports[nb_ports_in_mask-1].dst = &ctrl->vm_ports[nb_ports_in_mask];
 704                 }
 705
 706                 nb_ports_in_mask++;
 707
 708                 rte_eth_dev_info_get(portid, &dev_info);
 709         }
 710         if (nb_ports_in_mask % 2) {
 711                 printf("Notice: odd number of ports in portmask.\n");
 712                 ctrl->vm_ports[nb_ports_in_mask-1].dst =
 713                                 &ctrl->vm_ports[nb_ports_in_mask-1];
 714         }
 715
 716         rx_lcore_id = 0;
 717         qconf = NULL;
 718
 719         printf("Initializing ports configuration...\n");
 720
 721         nb_ports_available = nb_ports;
 722
 723         /* Initialise each port */
 724         for (portid = 0; portid < nb_ports; portid++) {
 725
 726                 /* skip ports that are not enabled */
 727                 if ((l2fwd_ivshmem_enabled_port_mask & (1 << portid)) == 0) {
 728                         printf("Skipping disabled port %u\n", (unsigned) portid);
 729                         nb_ports_available--;
 730                         continue;
 731                 }
 732
 733                 /* init port */
 734                 printf("Initializing port %u... ", (unsigned) portid);
 735                 fflush(stdout);
 736                 ret = rte_eth_dev_configure(portid, 1, 1, &port_conf);
 737                 if (ret < 0)
 738                         rte_exit(EXIT_FAILURE, "Cannot configure device: err=%d, port=%u\n",
 739                                   ret, (unsigned) portid);
 740
 741                 rte_eth_macaddr_get(portid,&l2fwd_ivshmem_ports_eth_addr[portid]);
 742
 743                 /* init one RX queue */
 744                 fflush(stdout);
 745                 ret = rte_eth_rx_queue_setup(portid, 0, nb_rxd,
 746                                                  rte_eth_dev_socket_id(portid),
 747                                                  NULL,
 748                                                  l2fwd_ivshmem_pktmbuf_pool);
 749                 if (ret < 0)
 750                         rte_exit(EXIT_FAILURE, "rte_eth_rx_queue_setup:err=%d, port=%u\n",
 751                                   ret, (unsigned) portid);
 752
 753                 /* init one TX queue on each port */
 754                 fflush(stdout);
 755                 ret = rte_eth_tx_queue_setup(portid, 0, nb_txd,
 756                                 rte_eth_dev_socket_id(portid),
 757                                 NULL);
 758                 if (ret < 0)
 759                         rte_exit(EXIT_FAILURE, "rte_eth_tx_queue_setup:err=%d, port=%u\n",
 760                                 ret, (unsigned) portid);
 761
 762                 /* Start device */
 763                 ret = rte_eth_dev_start(portid);
 764                 if (ret < 0)
 765                         rte_exit(EXIT_FAILURE, "rte_eth_dev_start:err=%d, port=%u\n",
 766                                   ret, (unsigned) portid);
 767
 768                 printf("done: \n");
 769
 770                 rte_eth_promiscuous_enable(portid);
 771
 772                 printf("Port %u, MAC address: %02X:%02X:%02X:%02X:%02X:%02X\n\n",
 773                                 (unsigned) portid,
 774                                 l2fwd_ivshmem_ports_eth_addr[portid].addr_bytes[0],
 775                                 l2fwd_ivshmem_ports_eth_addr[portid].addr_bytes[1],
 776                                 l2fwd_ivshmem_ports_eth_addr[portid].addr_bytes[2],
 777                                 l2fwd_ivshmem_ports_eth_addr[portid].addr_bytes[3],
 778                                 l2fwd_ivshmem_ports_eth_addr[portid].addr_bytes[4],
 779                                 l2fwd_ivshmem_ports_eth_addr[portid].addr_bytes[5]);
 780
 781                 /* initialize port stats */
 782                 memset(&port_statistics, 0, sizeof(port_statistics));
 783         }
 784
 785         if (!nb_ports_available) {
 786                 rte_exit(EXIT_FAILURE,
 787                         "All available ports are disabled. Please set portmask.\n");
 788         }
 789         port_nr = 0;
 790
 791         /* Initialize the port/queue configuration of each logical core */
 792         for (portid = 0; portid < nb_ports; portid++) {
 793                 if ((l2fwd_ivshmem_enabled_port_mask & (1 << portid)) == 0)
 794                         continue;
 795
 796                 /* get the lcore_id for this port */
 797                 while (rte_lcore_is_enabled(rx_lcore_id) == 0 ||
 798                            lcore_queue_conf[rx_lcore_id].n_rx_port ==
 799                                            l2fwd_ivshmem_rx_queue_per_lcore) {
 800                         rx_lcore_id++;
 801                         if (rx_lcore_id >= RTE_MAX_LCORE)
 802                                 rte_exit(EXIT_FAILURE, "Not enough cores\n");
 803                 }
 804
 805                 if (qconf != &lcore_queue_conf[rx_lcore_id])
 806                         /* Assigned a new logical core in the loop above. */
 807                         qconf = &lcore_queue_conf[rx_lcore_id];
 808
 809
 810                 rte_eth_macaddr_get(portid, &ctrl->vm_ports[port_nr].ethaddr);
 811
 812                 qconf->rx_port_list[qconf->n_rx_port] = portid;
 813                 qconf->port_param[qconf->n_rx_port] = &ctrl->vm_ports[port_nr];
 814                 qconf->n_rx_port++;
 815                 port_nr++;
 816                 printf("Lcore %u: RX port %u\n", rx_lcore_id, (unsigned) portid);
 817         }
 818
 819         check_all_ports_link_status(nb_ports_available, l2fwd_ivshmem_enabled_port_mask);
 820
 821         /* create rings for each VM port (several ports can be on the same VM).
 822          * note that we store the pointers in ctrl - that way, they are the same
 823          * and valid across all VMs because ctrl is also in DPDK memory */
 824         for (portid = 0; portid < nb_ports_available; portid++) {
 825
 826                 /* RX ring. SP/SC because it's only used by host and a single VM */
 827                 snprintf(name, sizeof(name), "%s%i", RX_RING_PREFIX, portid);
 828                 r = rte_ring_create(name, NB_MBUF,
 829                                 SOCKET_ID_ANY, RING_F_SP_ENQ | RING_F_SC_DEQ);
 830                 if (r == NULL)
 831                         rte_exit(EXIT_FAILURE, "Cannot create ring %s\n", name);
 832
 833                 ctrl->vm_ports[portid].rx_ring = r;
 834
 835                 /* TX ring. SP/SC because it's only used by host and a single VM */
 836                 snprintf(name, sizeof(name), "%s%i", TX_RING_PREFIX, portid);
 837                 r = rte_ring_create(name, NB_MBUF,
 838                                 SOCKET_ID_ANY, RING_F_SP_ENQ | RING_F_SC_DEQ);
 839                 if (r == NULL)
 840                         rte_exit(EXIT_FAILURE, "Cannot create ring %s\n", name);
 841
 842                 ctrl->vm_ports[portid].tx_ring = r;
 843         }
 844
 845         /* create metadata, output cmdline */
 846         if (rte_ivshmem_metadata_create(METADATA_NAME) < 0)
 847                 rte_exit(EXIT_FAILURE, "Cannot create IVSHMEM metadata\n");
 848
 849         if (rte_ivshmem_metadata_add_memzone(ctrl_mz, METADATA_NAME))
 850                 rte_exit(EXIT_FAILURE, "Cannot add memzone to IVSHMEM metadata\n");
 851
 852         if (rte_ivshmem_metadata_add_mempool(l2fwd_ivshmem_pktmbuf_pool, METADATA_NAME))
 853                 rte_exit(EXIT_FAILURE, "Cannot add mbuf mempool to IVSHMEM metadata\n");
 854
 855         for (portid = 0; portid < nb_ports_available; portid++) {
 856                 if (rte_ivshmem_metadata_add_ring(ctrl->vm_ports[portid].rx_ring,
 857                                 METADATA_NAME) < 0)
 858                         rte_exit(EXIT_FAILURE, "Cannot add ring %s to IVSHMEM metadata\n",
 859                                         ctrl->vm_ports[portid].rx_ring->name);
 860                 if (rte_ivshmem_metadata_add_ring(ctrl->vm_ports[portid].tx_ring,
 861                                 METADATA_NAME) < 0)
 862                         rte_exit(EXIT_FAILURE, "Cannot add ring %s to IVSHMEM metadata\n",
 863                                         ctrl->vm_ports[portid].tx_ring->name);
 864         }
 865         generate_ivshmem_cmdline(METADATA_NAME);
 866
 867         ctrl->nb_ports = nb_ports_available;
 868
 869         printf("Waiting for VM to initialize...\n");
 870
 871         /* wait for VM to initialize */
 872         while (ctrl->state != STATE_FWD) {
 873                 if (ctrl->state == STATE_FAIL)
 874                         rte_exit(EXIT_FAILURE, "VM reported failure\n");
 875
 876                 sleep(1);
 877         }
 878
 879         printf("Done!\n");
 880
 881         sigsetup();
 882
 883         /* launch per-lcore init on every lcore */
 884         rte_eal_mp_remote_launch(l2fwd_ivshmem_launch_one_lcore, NULL, CALL_MASTER);
 885         RTE_LCORE_FOREACH_SLAVE(lcore_id) {
 886                 if (rte_eal_wait_lcore(lcore_id) < 0)
 887                         return -1;
 888         }
 889
 890         if (ctrl->state == STATE_FAIL)
 891                 rte_exit(EXIT_FAILURE, "VM reported failure\n");
 892
 893         return 0;
 894 }