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 = 0;
 114         uint64_t total_vm_packets_tx, total_vm_packets_rx;
 115         unsigned portid;
 116
 117         total_packets_dropped = 0;
 118         total_packets_tx = 0;
 119         total_packets_rx = 0;
 120         total_vm_packets_tx = 0;
 121         total_vm_packets_rx = 0;
 122
 123         const char clr[] = { 27, '[', '2', 'J', '\0' };
 124         const char topLeft[] = { 27, '[', '1', ';', '1', 'H','\0' };
 125
 126                 /* Clear screen and move to top left */
 127         printf("%s%s", clr, topLeft);
 128
 129         printf("\nPort statistics ====================================");
 130
 131         for (portid = 0; portid < RTE_MAX_ETHPORTS; portid++) {
 132                 /* skip disabled ports */
 133                 if ((l2fwd_ivshmem_enabled_port_mask & (1 << portid)) == 0)
 134                         continue;
 135                 printf("\nStatistics for port %u ------------------------------"
 136                            "\nPackets sent: %24"PRIu64
 137                            "\nPackets received: %20"PRIu64
 138                            "\nPackets dropped: %21"PRIu64,
 139                            portid,
 140                            port_statistics[portid].tx,
 141                            port_statistics[portid].rx,
 142                            port_statistics[portid].dropped);
 143
 144                 total_packets_dropped += port_statistics[portid].dropped;
 145                 total_packets_tx += port_statistics[portid].tx;
 146                 total_packets_rx += port_statistics[portid].rx;
 147         }
 148
 149         printf("\nVM statistics ======================================");
 150         for (portid = 0; portid < ctrl->nb_ports; portid++) {
 151                 printf("\nStatistics for port %u ------------------------------"
 152                            "\nPackets sent: %24"PRIu64
 153                            "\nPackets received: %20"PRIu64,
 154                            portid,
 155                            ctrl->vm_ports[portid].stats.tx,
 156                            ctrl->vm_ports[portid].stats.rx);
 157
 158                 total_vm_packets_dropped += ctrl->vm_ports[portid].stats.dropped;
 159                 total_vm_packets_tx += ctrl->vm_ports[portid].stats.tx;
 160                 total_vm_packets_rx += ctrl->vm_ports[portid].stats.rx;
 161         }
 162         printf("\nAggregate statistics ==============================="
 163                            "\nTotal packets sent: %18"PRIu64
 164                            "\nTotal packets received: %14"PRIu64
 165                            "\nTotal packets dropped: %15"PRIu64
 166                            "\nTotal VM packets sent: %15"PRIu64
 167                            "\nTotal VM packets received: %11"PRIu64,
 168                            total_packets_tx,
 169                            total_packets_rx,
 170                            total_packets_dropped,
 171                            total_vm_packets_tx,
 172                            total_vm_packets_rx);
 173         printf("\n====================================================\n");
 174 }
 175
 176 static int
 177 print_to_file(const char *cmdline, const char *config_name)
 178 {
 179         FILE *file;
 180         char path[PATH_MAX];
 181
 182         snprintf(path, sizeof(path), QEMU_CMD_FMT, config_name);
 183         file = fopen(path, "w");
 184         if (file == NULL) {
 185                 RTE_LOG(ERR, L2FWD_IVSHMEM, "Could not open '%s' \n", path);
 186                 return -1;
 187         }
 188
 189         RTE_LOG(DEBUG, L2FWD_IVSHMEM, "QEMU command line for config '%s': %s \n",
 190                         config_name, cmdline);
 191
 192         fprintf(file, "%s\n", cmdline);
 193         fclose(file);
 194         return 0;
 195 }
 196
 197 static int
 198 generate_ivshmem_cmdline(const char *config_name)
 199 {
 200         char cmdline[PATH_MAX];
 201         if (rte_ivshmem_metadata_cmdline_generate(cmdline, sizeof(cmdline),
 202                         config_name) < 0)
 203                 return -1;
 204
 205         if (print_to_file(cmdline, config_name) < 0)
 206                 return -1;
 207
 208         rte_ivshmem_metadata_dump(stdout, config_name);
 209         return 0;
 210 }
 211
 212 /* display usage */
 213 static void
 214 l2fwd_ivshmem_usage(const char *prgname)
 215 {
 216         printf("%s [EAL options] -- -p PORTMASK [-q NQ -T PERIOD]\n"
 217                    "  -p PORTMASK: hexadecimal bitmask of ports to configure\n"
 218                    "  -q NQ: number of queue (=ports) per lcore (default is 1)\n"
 219                    "  -T PERIOD: statistics will be refreshed each PERIOD seconds "
 220                        "(0 to disable, 10 default, 86400 maximum)\n",
 221                prgname);
 222 }
 223
 224 static unsigned int
 225 l2fwd_ivshmem_parse_nqueue(const char *q_arg)
 226 {
 227         char *end = NULL;
 228         unsigned long n;
 229
 230         /* parse hexadecimal string */
 231         n = strtoul(q_arg, &end, 10);
 232         if ((q_arg[0] == '\0') || (end == NULL) || (*end != '\0'))
 233                 return 0;
 234         if (n == 0)
 235                 return 0;
 236         if (n >= MAX_RX_QUEUE_PER_LCORE)
 237                 return 0;
 238
 239         return n;
 240 }
 241
 242 static int
 243 l2fwd_ivshmem_parse_portmask(const char *portmask)
 244 {
 245         char *end = NULL;
 246         unsigned long pm;
 247
 248         /* parse hexadecimal string */
 249         pm = strtoul(portmask, &end, 16);
 250         if ((portmask[0] == '\0') || (end == NULL) || (*end != '\0'))
 251                 return -1;
 252
 253         if (pm == 0)
 254                 return -1;
 255
 256         return pm;
 257 }
 258
 259 static int
 260 l2fwd_ivshmem_parse_timer_period(const char *q_arg)
 261 {
 262         char *end = NULL;
 263         int n;
 264
 265         /* parse number string */
 266         n = strtol(q_arg, &end, 10);
 267         if ((q_arg[0] == '\0') || (end == NULL) || (*end != '\0'))
 268                 return -1;
 269         if (n >= MAX_TIMER_PERIOD)
 270                 return -1;
 271
 272         return n;
 273 }
 274
 275 /* Parse the argument given in the command line of the application */
 276 static int
 277 l2fwd_ivshmem_parse_args(int argc, char **argv)
 278 {
 279         int opt, ret;
 280         char **argvopt;
 281         int option_index;
 282         char *prgname = argv[0];
 283         static struct option lgopts[] = {
 284                         {CMDLINE_OPT_FWD_CONF, 1, 0, 0},
 285                 {NULL, 0, 0, 0}
 286         };
 287
 288         argvopt = argv;
 289
 290         while ((opt = getopt_long(argc, argvopt, "q:p:T:",
 291                                   lgopts, &option_index)) != EOF) {
 292
 293                 switch (opt) {
 294                 /* portmask */
 295                 case 'p':
 296                         l2fwd_ivshmem_enabled_port_mask = l2fwd_ivshmem_parse_portmask(optarg);
 297                         if (l2fwd_ivshmem_enabled_port_mask == 0) {
 298                                 printf("invalid portmask\n");
 299                                 l2fwd_ivshmem_usage(prgname);
 300                                 return -1;
 301                         }
 302                         break;
 303
 304                 /* nqueue */
 305                 case 'q':
 306                         l2fwd_ivshmem_rx_queue_per_lcore = l2fwd_ivshmem_parse_nqueue(optarg);
 307                         if (l2fwd_ivshmem_rx_queue_per_lcore == 0) {
 308                                 printf("invalid queue number\n");
 309                                 l2fwd_ivshmem_usage(prgname);
 310                                 return -1;
 311                         }
 312                         break;
 313
 314                 /* timer period */
 315                 case 'T':
 316                         timer_period = l2fwd_ivshmem_parse_timer_period(optarg) * 1000 * TIMER_MILLISECOND;
 317                         if (timer_period < 0) {
 318                                 printf("invalid timer period\n");
 319                                 l2fwd_ivshmem_usage(prgname);
 320                                 return -1;
 321                         }
 322                         break;
 323
 324                 /* long options */
 325                 case 0:
 326                         l2fwd_ivshmem_usage(prgname);
 327                         return -1;
 328
 329                 default:
 330                         l2fwd_ivshmem_usage(prgname);
 331                         return -1;
 332                 }
 333         }
 334
 335         if (optind >= 0)
 336                 argv[optind-1] = prgname;
 337
 338         ret = optind-1;
 339         optind = 0; /* reset getopt lib */
 340         return ret;
 341 }
 342
 343 /* Check the link status of all ports in up to 9s, and print them finally */
 344 static void
 345 check_all_ports_link_status(uint8_t port_num, uint32_t port_mask)
 346 {
 347 #define CHECK_INTERVAL 100 /* 100ms */
 348 #define MAX_CHECK_TIME 90 /* 9s (90 * 100ms) in total */
 349         uint8_t portid, count, all_ports_up, print_flag = 0;
 350         struct rte_eth_link link;
 351
 352         printf("\nChecking link status");
 353         fflush(stdout);
 354         for (count = 0; count <= MAX_CHECK_TIME; count++) {
 355                 all_ports_up = 1;
 356                 for (portid = 0; portid < port_num; portid++) {
 357                         if ((port_mask & (1 << portid)) == 0)
 358                                 continue;
 359                         memset(&link, 0, sizeof(link));
 360                         rte_eth_link_get_nowait(portid, &link);
 361                         /* print link status if flag set */
 362                         if (print_flag == 1) {
 363                                 if (link.link_status)
 364                                         printf("Port %d Link Up - speed %u "
 365                                                 "Mbps - %s\n", (uint8_t)portid,
 366                                                 (unsigned)link.link_speed,
 367                                 (link.link_duplex == ETH_LINK_FULL_DUPLEX) ?
 368                                         ("full-duplex") : ("half-duplex\n"));
 369                                 else
 370                                         printf("Port %d Link Down\n",
 371                                                 (uint8_t)portid);
 372                                 continue;
 373                         }
 374                         /* clear all_ports_up flag if any link down */
 375                         if (link.link_status == ETH_LINK_DOWN) {
 376                                 all_ports_up = 0;
 377                                 break;
 378                         }
 379                 }
 380                 /* after finally printing all link status, get out */
 381                 if (print_flag == 1)
 382                         break;
 383
 384                 if (all_ports_up == 0) {
 385                         printf(".");
 386                         fflush(stdout);
 387                         rte_delay_ms(CHECK_INTERVAL);
 388                 }
 389
 390                 /* set the print_flag if all ports up or timeout */
 391                 if (all_ports_up == 1 || count == (MAX_CHECK_TIME - 1)) {
 392                         print_flag = 1;
 393                         printf("done\n");
 394                 }
 395         }
 396 }
 397
 398 /* Send the burst of packets on an output interface */
 399 static int
 400 l2fwd_ivshmem_send_burst(struct lcore_queue_conf *qconf, unsigned n, uint8_t port)
 401 {
 402         struct rte_mbuf **m_table;
 403         unsigned ret;
 404         unsigned queueid =0;
 405
 406         m_table = (struct rte_mbuf **)qconf->tx_mbufs[port].m_table;
 407
 408         ret = rte_eth_tx_burst(port, (uint16_t) queueid, m_table, (uint16_t) n);
 409         port_statistics[port].tx += ret;
 410         if (unlikely(ret < n)) {
 411                 port_statistics[port].dropped += (n - ret);
 412                 do {
 413                         rte_pktmbuf_free(m_table[ret]);
 414                 } while (++ret < n);
 415         }
 416
 417         return 0;
 418 }
 419
 420 /* Enqueue packets for TX and prepare them to be sent on the network */
 421 static int
 422 l2fwd_ivshmem_send_packet(struct rte_mbuf *m, uint8_t port)
 423 {
 424         unsigned lcore_id, len;
 425         struct lcore_queue_conf *qconf;
 426
 427         lcore_id = rte_lcore_id();
 428
 429         qconf = &lcore_queue_conf[lcore_id];
 430         len = qconf->tx_mbufs[port].len;
 431         qconf->tx_mbufs[port].m_table[len] = m;
 432         len++;
 433
 434         /* enough pkts to be sent */
 435         if (unlikely(len == MAX_PKT_BURST)) {
 436                 l2fwd_ivshmem_send_burst(qconf, MAX_PKT_BURST, port);
 437                 len = 0;
 438         }
 439
 440         qconf->tx_mbufs[port].len = len;
 441         return 0;
 442 }
 443
 444 static int
 445 l2fwd_ivshmem_receive_burst(struct lcore_queue_conf *qconf, unsigned portid,
 446                 unsigned vm_port)
 447 {
 448         struct rte_mbuf ** m;
 449         struct rte_ring * rx;
 450         unsigned len, pkt_idx;
 451
 452         m = qconf->rx_mbufs[portid].m_table;
 453         len = qconf->rx_mbufs[portid].len;
 454         rx = qconf->port_param[vm_port]->rx_ring;
 455
 456         /* if enqueueing failed, ring is probably full, so drop the packets */
 457         if (rte_ring_enqueue_bulk(rx, (void**) m, len) < 0) {
 458                 port_statistics[portid].dropped += len;
 459
 460                 pkt_idx = 0;
 461                 do {
 462                         rte_pktmbuf_free(m[pkt_idx]);
 463                 } while (++pkt_idx < len);
 464         }
 465         else
 466                 /* increment rx stats by however many packets we managed to receive */
 467                 port_statistics[portid].rx += len;
 468
 469         return 0;
 470 }
 471
 472 /* Enqueue packets for RX and prepare them to be sent to VM */
 473 static int
 474 l2fwd_ivshmem_receive_packets(struct rte_mbuf ** m, unsigned n, unsigned portid,
 475                 unsigned vm_port)
 476 {
 477         unsigned lcore_id, len, pkt_idx;
 478         struct lcore_queue_conf *qconf;
 479
 480         lcore_id = rte_lcore_id();
 481
 482         qconf = &lcore_queue_conf[lcore_id];
 483
 484         len = qconf->rx_mbufs[portid].len;
 485         pkt_idx = 0;
 486
 487         /* enqueue packets */
 488         while (pkt_idx < n && len < MAX_PKT_BURST * 2) {
 489                 qconf->rx_mbufs[portid].m_table[len++] = m[pkt_idx++];
 490         }
 491
 492         /* increment queue len by however many packets we managed to receive */
 493         qconf->rx_mbufs[portid].len += pkt_idx;
 494
 495         /* drop the unreceived packets */
 496         if (unlikely(pkt_idx < n)) {
 497                 port_statistics[portid].dropped += n - pkt_idx;
 498                 do {
 499                         rte_pktmbuf_free(m[pkt_idx]);
 500                 } while (++pkt_idx < n);
 501         }
 502
 503         /* drain the queue halfway through the maximum capacity */
 504         if (unlikely(qconf->rx_mbufs[portid].len >= MAX_PKT_BURST))
 505                 l2fwd_ivshmem_receive_burst(qconf, portid, vm_port);
 506
 507         return 0;
 508 }
 509
 510 /* loop for host forwarding mode.
 511  * the data flow is as follows:
 512  *  1) get packets from TX queue and send it out from a given port
 513  *  2) RX packets from given port and enqueue them on RX ring
 514  *  3) dequeue packets from TX ring and put them on TX queue for a given port
 515  */
 516 static void
 517 fwd_loop(void)
 518 {
 519         struct rte_mbuf *pkts_burst[MAX_PKT_BURST * 2];
 520         struct rte_mbuf *m;
 521         unsigned lcore_id;
 522         uint64_t prev_tsc, diff_tsc, cur_tsc, timer_tsc;
 523         unsigned i, j, portid, nb_rx;
 524         struct lcore_queue_conf *qconf;
 525         struct rte_ring *tx;
 526         const uint64_t drain_tsc = (rte_get_tsc_hz() + US_PER_S - 1) / US_PER_S * BURST_TX_DRAIN_US;
 527
 528         prev_tsc = 0;
 529         timer_tsc = 0;
 530
 531         lcore_id = rte_lcore_id();
 532         qconf = &lcore_queue_conf[lcore_id];
 533
 534         if (qconf->n_rx_port == 0) {
 535                 RTE_LOG(INFO, L2FWD_IVSHMEM, "lcore %u has nothing to do\n", lcore_id);
 536                 return;
 537         }
 538
 539         RTE_LOG(INFO, L2FWD_IVSHMEM, "entering main loop on lcore %u\n", lcore_id);
 540
 541         for (i = 0; i < qconf->n_rx_port; i++) {
 542
 543                 portid = qconf->rx_port_list[i];
 544                 RTE_LOG(INFO, L2FWD_IVSHMEM, " -- lcoreid=%u portid=%u\n", lcore_id,
 545                         portid);
 546         }
 547
 548         while (ctrl->state == STATE_FWD) {
 549
 550                 cur_tsc = rte_rdtsc();
 551
 552                 /*
 553                  * Burst queue drain
 554                  */
 555                 diff_tsc = cur_tsc - prev_tsc;
 556                 if (unlikely(diff_tsc > drain_tsc)) {
 557
 558                         /*
 559                          * TX
 560                          */
 561                         for (portid = 0; portid < RTE_MAX_ETHPORTS; portid++) {
 562                                 if (qconf->tx_mbufs[portid].len == 0)
 563                                         continue;
 564                                 l2fwd_ivshmem_send_burst(qconf,
 565                                                  qconf->tx_mbufs[portid].len,
 566                                                  (uint8_t) portid);
 567                                 qconf->tx_mbufs[portid].len = 0;
 568                         }
 569
 570                         /*
 571                          * RX
 572                          */
 573                         for (i = 0; i < qconf->n_rx_port; i++) {
 574                                 portid = qconf->rx_port_list[i];
 575                                 if (qconf->rx_mbufs[portid].len == 0)
 576                                         continue;
 577                                 l2fwd_ivshmem_receive_burst(qconf, portid, i);
 578                                 qconf->rx_mbufs[portid].len = 0;
 579                         }
 580
 581                         /* if timer is enabled */
 582                         if (timer_period > 0) {
 583
 584                                 /* advance the timer */
 585                                 timer_tsc += diff_tsc;
 586
 587                                 /* if timer has reached its timeout */
 588                                 if (unlikely(timer_tsc >= (uint64_t) timer_period)) {
 589
 590                                         /* do this only on master core */
 591                                         if (lcore_id == rte_get_master_lcore()) {
 592                                                 print_stats();
 593                                                 /* reset the timer */
 594                                                 timer_tsc = 0;
 595                                         }
 596                                 }
 597                         }
 598
 599                         prev_tsc = cur_tsc;
 600                 }
 601
 602                 /*
 603                  * packet RX and forwarding
 604                  */
 605                 for (i = 0; i < qconf->n_rx_port; i++) {
 606
 607                         /* RX packets from port and put them on RX ring */
 608                         portid = qconf->rx_port_list[i];
 609                         nb_rx = rte_eth_rx_burst((uint8_t) portid, 0,
 610                                                  pkts_burst, MAX_PKT_BURST);
 611
 612                         if (nb_rx != 0)
 613                                 l2fwd_ivshmem_receive_packets(pkts_burst, nb_rx, portid, i);
 614
 615                         /* dequeue packets from TX ring and send them to TX queue */
 616                         tx = qconf->port_param[i]->tx_ring;
 617
 618                         nb_rx = rte_ring_count(tx);
 619
 620                         nb_rx = RTE_MIN(nb_rx, (unsigned) MAX_PKT_BURST);
 621
 622                         if (nb_rx == 0)
 623                                 continue;
 624
 625                         /* should not happen */
 626                         if (unlikely(rte_ring_dequeue_bulk(tx, (void**) pkts_burst, nb_rx) < 0)) {
 627                                 ctrl->state = STATE_FAIL;
 628                                 return;
 629                         }
 630
 631                         for (j = 0; j < nb_rx; j++) {
 632                                 m = pkts_burst[j];
 633                                 l2fwd_ivshmem_send_packet(m, portid);
 634                         }
 635                 }
 636         }
 637 }
 638
 639 static int
 640 l2fwd_ivshmem_launch_one_lcore(__attribute__((unused)) void *dummy)
 641 {
 642         fwd_loop();
 643         return 0;
 644 }
 645
 646 int main(int argc, char **argv)
 647 {
 648         char name[RTE_RING_NAMESIZE];
 649         struct rte_ring *r;
 650         struct lcore_queue_conf *qconf;
 651         struct rte_eth_dev_info dev_info;
 652         uint8_t portid, port_nr;
 653         uint8_t nb_ports, nb_ports_available;
 654         uint8_t nb_ports_in_mask;
 655         int ret;
 656         unsigned lcore_id, rx_lcore_id;
 657
 658         /* init EAL */
 659         ret = rte_eal_init(argc, argv);
 660         if (ret < 0)
 661                 rte_exit(EXIT_FAILURE, "Invalid EAL arguments\n");
 662         argc -= ret;
 663         argv += ret;
 664
 665         /* parse application arguments (after the EAL ones) */
 666         ret = l2fwd_ivshmem_parse_args(argc, argv);
 667         if (ret < 0)
 668                 rte_exit(EXIT_FAILURE, "Invalid l2fwd-ivshmem arguments\n");
 669
 670         /* create a shared mbuf pool */
 671         l2fwd_ivshmem_pktmbuf_pool =
 672                 rte_pktmbuf_pool_create(MBUF_MP_NAME, NB_MBUF, 32,
 673                         0, RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id());
 674         if (l2fwd_ivshmem_pktmbuf_pool == NULL)
 675                 rte_exit(EXIT_FAILURE, "Cannot init mbuf pool\n");
 676
 677         nb_ports = rte_eth_dev_count();
 678         if (nb_ports == 0)
 679                 rte_exit(EXIT_FAILURE, "No Ethernet ports - bye\n");
 680
 681         /*
 682          * reserve memzone to communicate with VMs - we cannot use rte_malloc here
 683          * because while it is technically possible, it is a very bad idea to share
 684          * the heap between two primary processes.
 685          */
 686         ctrl_mz = rte_memzone_reserve(CTRL_MZ_NAME, sizeof(struct ivshmem_ctrl),
 687                         SOCKET_ID_ANY, 0);
 688         if (ctrl_mz == NULL)
 689                 rte_exit(EXIT_FAILURE, "Cannot reserve control memzone\n");
 690         ctrl = (struct ivshmem_ctrl*) ctrl_mz->addr;
 691
 692         memset(ctrl, 0, sizeof(struct ivshmem_ctrl));
 693
 694         /*
 695          * Each port is assigned an output port.
 696          */
 697         nb_ports_in_mask = 0;
 698         for (portid = 0; portid < nb_ports; portid++) {
 699                 /* skip ports that are not enabled */
 700                 if ((l2fwd_ivshmem_enabled_port_mask & (1 << portid)) == 0)
 701                         continue;
 702                 if (portid % 2) {
 703                         ctrl->vm_ports[nb_ports_in_mask].dst = &ctrl->vm_ports[nb_ports_in_mask-1];
 704                         ctrl->vm_ports[nb_ports_in_mask-1].dst = &ctrl->vm_ports[nb_ports_in_mask];
 705                 }
 706
 707                 nb_ports_in_mask++;
 708
 709                 rte_eth_dev_info_get(portid, &dev_info);
 710         }
 711         if (nb_ports_in_mask % 2) {
 712                 printf("Notice: odd number of ports in portmask.\n");
 713                 ctrl->vm_ports[nb_ports_in_mask-1].dst =
 714                                 &ctrl->vm_ports[nb_ports_in_mask-1];
 715         }
 716
 717         rx_lcore_id = 0;
 718         qconf = NULL;
 719
 720         printf("Initializing ports configuration...\n");
 721
 722         nb_ports_available = nb_ports;
 723
 724         /* Initialise each port */
 725         for (portid = 0; portid < nb_ports; portid++) {
 726
 727                 /* skip ports that are not enabled */
 728                 if ((l2fwd_ivshmem_enabled_port_mask & (1 << portid)) == 0) {
 729                         printf("Skipping disabled port %u\n", (unsigned) portid);
 730                         nb_ports_available--;
 731                         continue;
 732                 }
 733
 734                 /* init port */
 735                 printf("Initializing port %u... ", (unsigned) portid);
 736                 fflush(stdout);
 737                 ret = rte_eth_dev_configure(portid, 1, 1, &port_conf);
 738                 if (ret < 0)
 739                         rte_exit(EXIT_FAILURE, "Cannot configure device: err=%d, port=%u\n",
 740                                   ret, (unsigned) portid);
 741
 742                 rte_eth_macaddr_get(portid,&l2fwd_ivshmem_ports_eth_addr[portid]);
 743
 744                 /* init one RX queue */
 745                 fflush(stdout);
 746                 ret = rte_eth_rx_queue_setup(portid, 0, nb_rxd,
 747                                                  rte_eth_dev_socket_id(portid),
 748                                                  NULL,
 749                                                  l2fwd_ivshmem_pktmbuf_pool);
 750                 if (ret < 0)
 751                         rte_exit(EXIT_FAILURE, "rte_eth_rx_queue_setup:err=%d, port=%u\n",
 752                                   ret, (unsigned) portid);
 753
 754                 /* init one TX queue on each port */
 755                 fflush(stdout);
 756                 ret = rte_eth_tx_queue_setup(portid, 0, nb_txd,
 757                                 rte_eth_dev_socket_id(portid),
 758                                 NULL);
 759                 if (ret < 0)
 760                         rte_exit(EXIT_FAILURE, "rte_eth_tx_queue_setup:err=%d, port=%u\n",
 761                                 ret, (unsigned) portid);
 762
 763                 /* Start device */
 764                 ret = rte_eth_dev_start(portid);
 765                 if (ret < 0)
 766                         rte_exit(EXIT_FAILURE, "rte_eth_dev_start:err=%d, port=%u\n",
 767                                   ret, (unsigned) portid);
 768
 769                 printf("done: \n");
 770
 771                 rte_eth_promiscuous_enable(portid);
 772
 773                 printf("Port %u, MAC address: %02X:%02X:%02X:%02X:%02X:%02X\n\n",
 774                                 (unsigned) portid,
 775                                 l2fwd_ivshmem_ports_eth_addr[portid].addr_bytes[0],
 776                                 l2fwd_ivshmem_ports_eth_addr[portid].addr_bytes[1],
 777                                 l2fwd_ivshmem_ports_eth_addr[portid].addr_bytes[2],
 778                                 l2fwd_ivshmem_ports_eth_addr[portid].addr_bytes[3],
 779                                 l2fwd_ivshmem_ports_eth_addr[portid].addr_bytes[4],
 780                                 l2fwd_ivshmem_ports_eth_addr[portid].addr_bytes[5]);
 781
 782                 /* initialize port stats */
 783                 memset(&port_statistics, 0, sizeof(port_statistics));
 784         }
 785
 786         if (!nb_ports_available) {
 787                 rte_exit(EXIT_FAILURE,
 788                         "All available ports are disabled. Please set portmask.\n");
 789         }
 790         port_nr = 0;
 791
 792         /* Initialize the port/queue configuration of each logical core */
 793         for (portid = 0; portid < nb_ports; portid++) {
 794                 if ((l2fwd_ivshmem_enabled_port_mask & (1 << portid)) == 0)
 795                         continue;
 796
 797                 /* get the lcore_id for this port */
 798                 while (rte_lcore_is_enabled(rx_lcore_id) == 0 ||
 799                            lcore_queue_conf[rx_lcore_id].n_rx_port ==
 800                                            l2fwd_ivshmem_rx_queue_per_lcore) {
 801                         rx_lcore_id++;
 802                         if (rx_lcore_id >= RTE_MAX_LCORE)
 803                                 rte_exit(EXIT_FAILURE, "Not enough cores\n");
 804                 }
 805
 806                 if (qconf != &lcore_queue_conf[rx_lcore_id])
 807                         /* Assigned a new logical core in the loop above. */
 808                         qconf = &lcore_queue_conf[rx_lcore_id];
 809
 810
 811                 rte_eth_macaddr_get(portid, &ctrl->vm_ports[port_nr].ethaddr);
 812
 813                 qconf->rx_port_list[qconf->n_rx_port] = portid;
 814                 qconf->port_param[qconf->n_rx_port] = &ctrl->vm_ports[port_nr];
 815                 qconf->n_rx_port++;
 816                 port_nr++;
 817                 printf("Lcore %u: RX port %u\n", rx_lcore_id, (unsigned) portid);
 818         }
 819
 820         check_all_ports_link_status(nb_ports_available, l2fwd_ivshmem_enabled_port_mask);
 821
 822         /* create rings for each VM port (several ports can be on the same VM).
 823          * note that we store the pointers in ctrl - that way, they are the same
 824          * and valid across all VMs because ctrl is also in DPDK memory */
 825         for (portid = 0; portid < nb_ports_available; portid++) {
 826
 827                 /* RX ring. SP/SC because it's only used by host and a single VM */
 828                 snprintf(name, sizeof(name), "%s%i", RX_RING_PREFIX, portid);
 829                 r = rte_ring_create(name, NB_MBUF,
 830                                 SOCKET_ID_ANY, RING_F_SP_ENQ | RING_F_SC_DEQ);
 831                 if (r == NULL)
 832                         rte_exit(EXIT_FAILURE, "Cannot create ring %s\n", name);
 833
 834                 ctrl->vm_ports[portid].rx_ring = r;
 835
 836                 /* TX ring. SP/SC because it's only used by host and a single VM */
 837                 snprintf(name, sizeof(name), "%s%i", TX_RING_PREFIX, portid);
 838                 r = rte_ring_create(name, NB_MBUF,
 839                                 SOCKET_ID_ANY, RING_F_SP_ENQ | RING_F_SC_DEQ);
 840                 if (r == NULL)
 841                         rte_exit(EXIT_FAILURE, "Cannot create ring %s\n", name);
 842
 843                 ctrl->vm_ports[portid].tx_ring = r;
 844         }
 845
 846         /* create metadata, output cmdline */
 847         if (rte_ivshmem_metadata_create(METADATA_NAME) < 0)
 848                 rte_exit(EXIT_FAILURE, "Cannot create IVSHMEM metadata\n");
 849
 850         if (rte_ivshmem_metadata_add_memzone(ctrl_mz, METADATA_NAME))
 851                 rte_exit(EXIT_FAILURE, "Cannot add memzone to IVSHMEM metadata\n");
 852
 853         if (rte_ivshmem_metadata_add_mempool(l2fwd_ivshmem_pktmbuf_pool, METADATA_NAME))
 854                 rte_exit(EXIT_FAILURE, "Cannot add mbuf mempool to IVSHMEM metadata\n");
 855
 856         for (portid = 0; portid < nb_ports_available; portid++) {
 857                 if (rte_ivshmem_metadata_add_ring(ctrl->vm_ports[portid].rx_ring,
 858                                 METADATA_NAME) < 0)
 859                         rte_exit(EXIT_FAILURE, "Cannot add ring %s to IVSHMEM metadata\n",
 860                                         ctrl->vm_ports[portid].rx_ring->name);
 861                 if (rte_ivshmem_metadata_add_ring(ctrl->vm_ports[portid].tx_ring,
 862                                 METADATA_NAME) < 0)
 863                         rte_exit(EXIT_FAILURE, "Cannot add ring %s to IVSHMEM metadata\n",
 864                                         ctrl->vm_ports[portid].tx_ring->name);
 865         }
 866         generate_ivshmem_cmdline(METADATA_NAME);
 867
 868         ctrl->nb_ports = nb_ports_available;
 869
 870         printf("Waiting for VM to initialize...\n");
 871
 872         /* wait for VM to initialize */
 873         while (ctrl->state != STATE_FWD) {
 874                 if (ctrl->state == STATE_FAIL)
 875                         rte_exit(EXIT_FAILURE, "VM reported failure\n");
 876
 877                 sleep(1);
 878         }
 879
 880         printf("Done!\n");
 881
 882         sigsetup();
 883
 884         /* launch per-lcore init on every lcore */
 885         rte_eal_mp_remote_launch(l2fwd_ivshmem_launch_one_lcore, NULL, CALL_MASTER);
 886         RTE_LCORE_FOREACH_SLAVE(lcore_id) {
 887                 if (rte_eal_wait_lcore(lcore_id) < 0)
 888                         return -1;
 889         }
 890
 891         if (ctrl->state == STATE_FAIL)
 892                 rte_exit(EXIT_FAILURE, "VM reported failure\n");
 893
 894         return 0;
 895 }