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[dpdk.git] / examples / l2fwd / main.c
1 /* SPDX-License-Identifier: BSD-3-Clause
2  * Copyright(c) 2010-2016 Intel Corporation
3  */
4
5 #include <stdio.h>
6 #include <stdlib.h>
7 #include <string.h>
8 #include <stdint.h>
9 #include <inttypes.h>
10 #include <sys/types.h>
11 #include <sys/queue.h>
12 #include <netinet/in.h>
13 #include <setjmp.h>
14 #include <stdarg.h>
15 #include <ctype.h>
16 #include <errno.h>
17 #include <getopt.h>
18 #include <signal.h>
19 #include <stdbool.h>
20
21 #include <rte_common.h>
22 #include <rte_log.h>
23 #include <rte_malloc.h>
24 #include <rte_memory.h>
25 #include <rte_memcpy.h>
26 #include <rte_eal.h>
27 #include <rte_launch.h>
28 #include <rte_atomic.h>
29 #include <rte_cycles.h>
30 #include <rte_prefetch.h>
31 #include <rte_lcore.h>
32 #include <rte_per_lcore.h>
33 #include <rte_branch_prediction.h>
34 #include <rte_interrupts.h>
35 #include <rte_random.h>
36 #include <rte_debug.h>
37 #include <rte_ether.h>
38 #include <rte_ethdev.h>
39 #include <rte_mempool.h>
40 #include <rte_mbuf.h>
41
42 static volatile bool force_quit;
43
44 /* MAC updating enabled by default */
45 static int mac_updating = 1;
46
47 #define RTE_LOGTYPE_L2FWD RTE_LOGTYPE_USER1
48
49 #define MAX_PKT_BURST 32
50 #define BURST_TX_DRAIN_US 100 /* TX drain every ~100us */
51 #define MEMPOOL_CACHE_SIZE 256
52
53 /*
54  * Configurable number of RX/TX ring descriptors
55  */
56 #define RTE_TEST_RX_DESC_DEFAULT 1024
57 #define RTE_TEST_TX_DESC_DEFAULT 1024
58 static uint16_t nb_rxd = RTE_TEST_RX_DESC_DEFAULT;
59 static uint16_t nb_txd = RTE_TEST_TX_DESC_DEFAULT;
60
61 /* ethernet addresses of ports */
62 static struct ether_addr l2fwd_ports_eth_addr[RTE_MAX_ETHPORTS];
63
64 /* mask of enabled ports */
65 static uint32_t l2fwd_enabled_port_mask = 0;
66
67 /* list of enabled ports */
68 static uint32_t l2fwd_dst_ports[RTE_MAX_ETHPORTS];
69
70 static unsigned int l2fwd_rx_queue_per_lcore = 1;
71
72 #define MAX_RX_QUEUE_PER_LCORE 16
73 #define MAX_TX_QUEUE_PER_PORT 16
74 struct lcore_queue_conf {
75         unsigned n_rx_port;
76         unsigned rx_port_list[MAX_RX_QUEUE_PER_LCORE];
77 } __rte_cache_aligned;
78 struct lcore_queue_conf lcore_queue_conf[RTE_MAX_LCORE];
79
80 static struct rte_eth_dev_tx_buffer *tx_buffer[RTE_MAX_ETHPORTS];
81
82 static struct rte_eth_conf port_conf = {
83         .rxmode = {
84                 .split_hdr_size = 0,
85                 .offloads = DEV_RX_OFFLOAD_CRC_STRIP,
86         },
87         .txmode = {
88                 .mq_mode = ETH_MQ_TX_NONE,
89         },
90 };
91
92 struct rte_mempool * l2fwd_pktmbuf_pool = NULL;
93
94 /* Per-port statistics struct */
95 struct l2fwd_port_statistics {
96         uint64_t tx;
97         uint64_t rx;
98         uint64_t dropped;
99 } __rte_cache_aligned;
100 struct l2fwd_port_statistics port_statistics[RTE_MAX_ETHPORTS];
101
102 #define MAX_TIMER_PERIOD 86400 /* 1 day max */
103 /* A tsc-based timer responsible for triggering statistics printout */
104 static uint64_t timer_period = 10; /* default period is 10 seconds */
105
106 /* Print out statistics on packets dropped */
107 static void
108 print_stats(void)
109 {
110         uint64_t total_packets_dropped, total_packets_tx, total_packets_rx;
111         unsigned portid;
112
113         total_packets_dropped = 0;
114         total_packets_tx = 0;
115         total_packets_rx = 0;
116
117         const char clr[] = { 27, '[', '2', 'J', '\0' };
118         const char topLeft[] = { 27, '[', '1', ';', '1', 'H','\0' };
119
120                 /* Clear screen and move to top left */
121         printf("%s%s", clr, topLeft);
122
123         printf("\nPort statistics ====================================");
124
125         for (portid = 0; portid < RTE_MAX_ETHPORTS; portid++) {
126                 /* skip disabled ports */
127                 if ((l2fwd_enabled_port_mask & (1 << portid)) == 0)
128                         continue;
129                 printf("\nStatistics for port %u ------------------------------"
130                            "\nPackets sent: %24"PRIu64
131                            "\nPackets received: %20"PRIu64
132                            "\nPackets dropped: %21"PRIu64,
133                            portid,
134                            port_statistics[portid].tx,
135                            port_statistics[portid].rx,
136                            port_statistics[portid].dropped);
137
138                 total_packets_dropped += port_statistics[portid].dropped;
139                 total_packets_tx += port_statistics[portid].tx;
140                 total_packets_rx += port_statistics[portid].rx;
141         }
142         printf("\nAggregate statistics ==============================="
143                    "\nTotal packets sent: %18"PRIu64
144                    "\nTotal packets received: %14"PRIu64
145                    "\nTotal packets dropped: %15"PRIu64,
146                    total_packets_tx,
147                    total_packets_rx,
148                    total_packets_dropped);
149         printf("\n====================================================\n");
150 }
151
152 static void
153 l2fwd_mac_updating(struct rte_mbuf *m, unsigned dest_portid)
154 {
155         struct ether_hdr *eth;
156         void *tmp;
157
158         eth = rte_pktmbuf_mtod(m, struct ether_hdr *);
159
160         /* 02:00:00:00:00:xx */
161         tmp = &eth->d_addr.addr_bytes[0];
162         *((uint64_t *)tmp) = 0x000000000002 + ((uint64_t)dest_portid << 40);
163
164         /* src addr */
165         ether_addr_copy(&l2fwd_ports_eth_addr[dest_portid], &eth->s_addr);
166 }
167
168 static void
169 l2fwd_simple_forward(struct rte_mbuf *m, unsigned portid)
170 {
171         unsigned dst_port;
172         int sent;
173         struct rte_eth_dev_tx_buffer *buffer;
174
175         dst_port = l2fwd_dst_ports[portid];
176
177         if (mac_updating)
178                 l2fwd_mac_updating(m, dst_port);
179
180         buffer = tx_buffer[dst_port];
181         sent = rte_eth_tx_buffer(dst_port, 0, buffer, m);
182         if (sent)
183                 port_statistics[dst_port].tx += sent;
184 }
185
186 /* main processing loop */
187 static void
188 l2fwd_main_loop(void)
189 {
190         struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
191         struct rte_mbuf *m;
192         int sent;
193         unsigned lcore_id;
194         uint64_t prev_tsc, diff_tsc, cur_tsc, timer_tsc;
195         unsigned i, j, portid, nb_rx;
196         struct lcore_queue_conf *qconf;
197         const uint64_t drain_tsc = (rte_get_tsc_hz() + US_PER_S - 1) / US_PER_S *
198                         BURST_TX_DRAIN_US;
199         struct rte_eth_dev_tx_buffer *buffer;
200
201         prev_tsc = 0;
202         timer_tsc = 0;
203
204         lcore_id = rte_lcore_id();
205         qconf = &lcore_queue_conf[lcore_id];
206
207         if (qconf->n_rx_port == 0) {
208                 RTE_LOG(INFO, L2FWD, "lcore %u has nothing to do\n", lcore_id);
209                 return;
210         }
211
212         RTE_LOG(INFO, L2FWD, "entering main loop on lcore %u\n", lcore_id);
213
214         for (i = 0; i < qconf->n_rx_port; i++) {
215
216                 portid = qconf->rx_port_list[i];
217                 RTE_LOG(INFO, L2FWD, " -- lcoreid=%u portid=%u\n", lcore_id,
218                         portid);
219
220         }
221
222         while (!force_quit) {
223
224                 cur_tsc = rte_rdtsc();
225
226                 /*
227                  * TX burst queue drain
228                  */
229                 diff_tsc = cur_tsc - prev_tsc;
230                 if (unlikely(diff_tsc > drain_tsc)) {
231
232                         for (i = 0; i < qconf->n_rx_port; i++) {
233
234                                 portid = l2fwd_dst_ports[qconf->rx_port_list[i]];
235                                 buffer = tx_buffer[portid];
236
237                                 sent = rte_eth_tx_buffer_flush(portid, 0, buffer);
238                                 if (sent)
239                                         port_statistics[portid].tx += sent;
240
241                         }
242
243                         /* if timer is enabled */
244                         if (timer_period > 0) {
245
246                                 /* advance the timer */
247                                 timer_tsc += diff_tsc;
248
249                                 /* if timer has reached its timeout */
250                                 if (unlikely(timer_tsc >= timer_period)) {
251
252                                         /* do this only on master core */
253                                         if (lcore_id == rte_get_master_lcore()) {
254                                                 print_stats();
255                                                 /* reset the timer */
256                                                 timer_tsc = 0;
257                                         }
258                                 }
259                         }
260
261                         prev_tsc = cur_tsc;
262                 }
263
264                 /*
265                  * Read packet from RX queues
266                  */
267                 for (i = 0; i < qconf->n_rx_port; i++) {
268
269                         portid = qconf->rx_port_list[i];
270                         nb_rx = rte_eth_rx_burst(portid, 0,
271                                                  pkts_burst, MAX_PKT_BURST);
272
273                         port_statistics[portid].rx += nb_rx;
274
275                         for (j = 0; j < nb_rx; j++) {
276                                 m = pkts_burst[j];
277                                 rte_prefetch0(rte_pktmbuf_mtod(m, void *));
278                                 l2fwd_simple_forward(m, portid);
279                         }
280                 }
281         }
282 }
283
284 static int
285 l2fwd_launch_one_lcore(__attribute__((unused)) void *dummy)
286 {
287         l2fwd_main_loop();
288         return 0;
289 }
290
291 /* display usage */
292 static void
293 l2fwd_usage(const char *prgname)
294 {
295         printf("%s [EAL options] -- -p PORTMASK [-q NQ]\n"
296                "  -p PORTMASK: hexadecimal bitmask of ports to configure\n"
297                "  -q NQ: number of queue (=ports) per lcore (default is 1)\n"
298                    "  -T PERIOD: statistics will be refreshed each PERIOD seconds (0 to disable, 10 default, 86400 maximum)\n"
299                    "  --[no-]mac-updating: Enable or disable MAC addresses updating (enabled by default)\n"
300                    "      When enabled:\n"
301                    "       - The source MAC address is replaced by the TX port MAC address\n"
302                    "       - The destination MAC address is replaced by 02:00:00:00:00:TX_PORT_ID\n",
303                prgname);
304 }
305
306 static int
307 l2fwd_parse_portmask(const char *portmask)
308 {
309         char *end = NULL;
310         unsigned long pm;
311
312         /* parse hexadecimal string */
313         pm = strtoul(portmask, &end, 16);
314         if ((portmask[0] == '\0') || (end == NULL) || (*end != '\0'))
315                 return -1;
316
317         if (pm == 0)
318                 return -1;
319
320         return pm;
321 }
322
323 static unsigned int
324 l2fwd_parse_nqueue(const char *q_arg)
325 {
326         char *end = NULL;
327         unsigned long n;
328
329         /* parse hexadecimal string */
330         n = strtoul(q_arg, &end, 10);
331         if ((q_arg[0] == '\0') || (end == NULL) || (*end != '\0'))
332                 return 0;
333         if (n == 0)
334                 return 0;
335         if (n >= MAX_RX_QUEUE_PER_LCORE)
336                 return 0;
337
338         return n;
339 }
340
341 static int
342 l2fwd_parse_timer_period(const char *q_arg)
343 {
344         char *end = NULL;
345         int n;
346
347         /* parse number string */
348         n = strtol(q_arg, &end, 10);
349         if ((q_arg[0] == '\0') || (end == NULL) || (*end != '\0'))
350                 return -1;
351         if (n >= MAX_TIMER_PERIOD)
352                 return -1;
353
354         return n;
355 }
356
357 static const char short_options[] =
358         "p:"  /* portmask */
359         "q:"  /* number of queues */
360         "T:"  /* timer period */
361         ;
362
363 #define CMD_LINE_OPT_MAC_UPDATING "mac-updating"
364 #define CMD_LINE_OPT_NO_MAC_UPDATING "no-mac-updating"
365
366 enum {
367         /* long options mapped to a short option */
368
369         /* first long only option value must be >= 256, so that we won't
370          * conflict with short options */
371         CMD_LINE_OPT_MIN_NUM = 256,
372 };
373
374 static const struct option lgopts[] = {
375         { CMD_LINE_OPT_MAC_UPDATING, no_argument, &mac_updating, 1},
376         { CMD_LINE_OPT_NO_MAC_UPDATING, no_argument, &mac_updating, 0},
377         {NULL, 0, 0, 0}
378 };
379
380 /* Parse the argument given in the command line of the application */
381 static int
382 l2fwd_parse_args(int argc, char **argv)
383 {
384         int opt, ret, timer_secs;
385         char **argvopt;
386         int option_index;
387         char *prgname = argv[0];
388
389         argvopt = argv;
390
391         while ((opt = getopt_long(argc, argvopt, short_options,
392                                   lgopts, &option_index)) != EOF) {
393
394                 switch (opt) {
395                 /* portmask */
396                 case 'p':
397                         l2fwd_enabled_port_mask = l2fwd_parse_portmask(optarg);
398                         if (l2fwd_enabled_port_mask == 0) {
399                                 printf("invalid portmask\n");
400                                 l2fwd_usage(prgname);
401                                 return -1;
402                         }
403                         break;
404
405                 /* nqueue */
406                 case 'q':
407                         l2fwd_rx_queue_per_lcore = l2fwd_parse_nqueue(optarg);
408                         if (l2fwd_rx_queue_per_lcore == 0) {
409                                 printf("invalid queue number\n");
410                                 l2fwd_usage(prgname);
411                                 return -1;
412                         }
413                         break;
414
415                 /* timer period */
416                 case 'T':
417                         timer_secs = l2fwd_parse_timer_period(optarg);
418                         if (timer_secs < 0) {
419                                 printf("invalid timer period\n");
420                                 l2fwd_usage(prgname);
421                                 return -1;
422                         }
423                         timer_period = timer_secs;
424                         break;
425
426                 /* long options */
427                 case 0:
428                         break;
429
430                 default:
431                         l2fwd_usage(prgname);
432                         return -1;
433                 }
434         }
435
436         if (optind >= 0)
437                 argv[optind-1] = prgname;
438
439         ret = optind-1;
440         optind = 1; /* reset getopt lib */
441         return ret;
442 }
443
444 /* Check the link status of all ports in up to 9s, and print them finally */
445 static void
446 check_all_ports_link_status(uint32_t port_mask)
447 {
448 #define CHECK_INTERVAL 100 /* 100ms */
449 #define MAX_CHECK_TIME 90 /* 9s (90 * 100ms) in total */
450         uint16_t portid;
451         uint8_t count, all_ports_up, print_flag = 0;
452         struct rte_eth_link link;
453
454         printf("\nChecking link status");
455         fflush(stdout);
456         for (count = 0; count <= MAX_CHECK_TIME; count++) {
457                 if (force_quit)
458                         return;
459                 all_ports_up = 1;
460                 RTE_ETH_FOREACH_DEV(portid) {
461                         if (force_quit)
462                                 return;
463                         if ((port_mask & (1 << portid)) == 0)
464                                 continue;
465                         memset(&link, 0, sizeof(link));
466                         rte_eth_link_get_nowait(portid, &link);
467                         /* print link status if flag set */
468                         if (print_flag == 1) {
469                                 if (link.link_status)
470                                         printf(
471                                         "Port%d Link Up. Speed %u Mbps - %s\n",
472                                                 portid, link.link_speed,
473                                 (link.link_duplex == ETH_LINK_FULL_DUPLEX) ?
474                                         ("full-duplex") : ("half-duplex\n"));
475                                 else
476                                         printf("Port %d Link Down\n", portid);
477                                 continue;
478                         }
479                         /* clear all_ports_up flag if any link down */
480                         if (link.link_status == ETH_LINK_DOWN) {
481                                 all_ports_up = 0;
482                                 break;
483                         }
484                 }
485                 /* after finally printing all link status, get out */
486                 if (print_flag == 1)
487                         break;
488
489                 if (all_ports_up == 0) {
490                         printf(".");
491                         fflush(stdout);
492                         rte_delay_ms(CHECK_INTERVAL);
493                 }
494
495                 /* set the print_flag if all ports up or timeout */
496                 if (all_ports_up == 1 || count == (MAX_CHECK_TIME - 1)) {
497                         print_flag = 1;
498                         printf("done\n");
499                 }
500         }
501 }
502
503 static void
504 signal_handler(int signum)
505 {
506         if (signum == SIGINT || signum == SIGTERM) {
507                 printf("\n\nSignal %d received, preparing to exit...\n",
508                                 signum);
509                 force_quit = true;
510         }
511 }
512
513 int
514 main(int argc, char **argv)
515 {
516         struct lcore_queue_conf *qconf;
517         int ret;
518         uint16_t nb_ports;
519         uint16_t nb_ports_available = 0;
520         uint16_t portid, last_port;
521         unsigned lcore_id, rx_lcore_id;
522         unsigned nb_ports_in_mask = 0;
523         unsigned int nb_lcores = 0;
524         unsigned int nb_mbufs;
525
526         /* init EAL */
527         ret = rte_eal_init(argc, argv);
528         if (ret < 0)
529                 rte_exit(EXIT_FAILURE, "Invalid EAL arguments\n");
530         argc -= ret;
531         argv += ret;
532
533         force_quit = false;
534         signal(SIGINT, signal_handler);
535         signal(SIGTERM, signal_handler);
536
537         /* parse application arguments (after the EAL ones) */
538         ret = l2fwd_parse_args(argc, argv);
539         if (ret < 0)
540                 rte_exit(EXIT_FAILURE, "Invalid L2FWD arguments\n");
541
542         printf("MAC updating %s\n", mac_updating ? "enabled" : "disabled");
543
544         /* convert to number of cycles */
545         timer_period *= rte_get_timer_hz();
546
547         nb_ports = rte_eth_dev_count_avail();
548         if (nb_ports == 0)
549                 rte_exit(EXIT_FAILURE, "No Ethernet ports - bye\n");
550
551         /* check port mask to possible port mask */
552         if (l2fwd_enabled_port_mask & ~((1 << nb_ports) - 1))
553                 rte_exit(EXIT_FAILURE, "Invalid portmask; possible (0x%x)\n",
554                         (1 << nb_ports) - 1);
555
556         /* reset l2fwd_dst_ports */
557         for (portid = 0; portid < RTE_MAX_ETHPORTS; portid++)
558                 l2fwd_dst_ports[portid] = 0;
559         last_port = 0;
560
561         /*
562          * Each logical core is assigned a dedicated TX queue on each port.
563          */
564         RTE_ETH_FOREACH_DEV(portid) {
565                 /* skip ports that are not enabled */
566                 if ((l2fwd_enabled_port_mask & (1 << portid)) == 0)
567                         continue;
568
569                 if (nb_ports_in_mask % 2) {
570                         l2fwd_dst_ports[portid] = last_port;
571                         l2fwd_dst_ports[last_port] = portid;
572                 }
573                 else
574                         last_port = portid;
575
576                 nb_ports_in_mask++;
577         }
578         if (nb_ports_in_mask % 2) {
579                 printf("Notice: odd number of ports in portmask.\n");
580                 l2fwd_dst_ports[last_port] = last_port;
581         }
582
583         rx_lcore_id = 0;
584         qconf = NULL;
585
586         /* Initialize the port/queue configuration of each logical core */
587         RTE_ETH_FOREACH_DEV(portid) {
588                 /* skip ports that are not enabled */
589                 if ((l2fwd_enabled_port_mask & (1 << portid)) == 0)
590                         continue;
591
592                 /* get the lcore_id for this port */
593                 while (rte_lcore_is_enabled(rx_lcore_id) == 0 ||
594                        lcore_queue_conf[rx_lcore_id].n_rx_port ==
595                        l2fwd_rx_queue_per_lcore) {
596                         rx_lcore_id++;
597                         if (rx_lcore_id >= RTE_MAX_LCORE)
598                                 rte_exit(EXIT_FAILURE, "Not enough cores\n");
599                 }
600
601                 if (qconf != &lcore_queue_conf[rx_lcore_id]) {
602                         /* Assigned a new logical core in the loop above. */
603                         qconf = &lcore_queue_conf[rx_lcore_id];
604                         nb_lcores++;
605                 }
606
607                 qconf->rx_port_list[qconf->n_rx_port] = portid;
608                 qconf->n_rx_port++;
609                 printf("Lcore %u: RX port %u\n", rx_lcore_id, portid);
610         }
611
612         nb_mbufs = RTE_MAX(nb_ports * (nb_rxd + nb_txd + MAX_PKT_BURST +
613                 nb_lcores * MEMPOOL_CACHE_SIZE), 8192U);
614
615         /* create the mbuf pool */
616         l2fwd_pktmbuf_pool = rte_pktmbuf_pool_create("mbuf_pool", nb_mbufs,
617                 MEMPOOL_CACHE_SIZE, 0, RTE_MBUF_DEFAULT_BUF_SIZE,
618                 rte_socket_id());
619         if (l2fwd_pktmbuf_pool == NULL)
620                 rte_exit(EXIT_FAILURE, "Cannot init mbuf pool\n");
621
622         /* Initialise each port */
623         RTE_ETH_FOREACH_DEV(portid) {
624                 struct rte_eth_rxconf rxq_conf;
625                 struct rte_eth_txconf txq_conf;
626                 struct rte_eth_conf local_port_conf = port_conf;
627                 struct rte_eth_dev_info dev_info;
628
629                 /* skip ports that are not enabled */
630                 if ((l2fwd_enabled_port_mask & (1 << portid)) == 0) {
631                         printf("Skipping disabled port %u\n", portid);
632                         continue;
633                 }
634                 nb_ports_available++;
635
636                 /* init port */
637                 printf("Initializing port %u... ", portid);
638                 fflush(stdout);
639                 rte_eth_dev_info_get(portid, &dev_info);
640                 if (dev_info.tx_offload_capa & DEV_TX_OFFLOAD_MBUF_FAST_FREE)
641                         local_port_conf.txmode.offloads |=
642                                 DEV_TX_OFFLOAD_MBUF_FAST_FREE;
643                 ret = rte_eth_dev_configure(portid, 1, 1, &local_port_conf);
644                 if (ret < 0)
645                         rte_exit(EXIT_FAILURE, "Cannot configure device: err=%d, port=%u\n",
646                                   ret, portid);
647
648                 ret = rte_eth_dev_adjust_nb_rx_tx_desc(portid, &nb_rxd,
649                                                        &nb_txd);
650                 if (ret < 0)
651                         rte_exit(EXIT_FAILURE,
652                                  "Cannot adjust number of descriptors: err=%d, port=%u\n",
653                                  ret, portid);
654
655                 rte_eth_macaddr_get(portid,&l2fwd_ports_eth_addr[portid]);
656
657                 /* init one RX queue */
658                 fflush(stdout);
659                 rxq_conf = dev_info.default_rxconf;
660                 rxq_conf.offloads = local_port_conf.rxmode.offloads;
661                 ret = rte_eth_rx_queue_setup(portid, 0, nb_rxd,
662                                              rte_eth_dev_socket_id(portid),
663                                              &rxq_conf,
664                                              l2fwd_pktmbuf_pool);
665                 if (ret < 0)
666                         rte_exit(EXIT_FAILURE, "rte_eth_rx_queue_setup:err=%d, port=%u\n",
667                                   ret, portid);
668
669                 /* init one TX queue on each port */
670                 fflush(stdout);
671                 txq_conf = dev_info.default_txconf;
672                 txq_conf.offloads = local_port_conf.txmode.offloads;
673                 ret = rte_eth_tx_queue_setup(portid, 0, nb_txd,
674                                 rte_eth_dev_socket_id(portid),
675                                 &txq_conf);
676                 if (ret < 0)
677                         rte_exit(EXIT_FAILURE, "rte_eth_tx_queue_setup:err=%d, port=%u\n",
678                                 ret, portid);
679
680                 /* Initialize TX buffers */
681                 tx_buffer[portid] = rte_zmalloc_socket("tx_buffer",
682                                 RTE_ETH_TX_BUFFER_SIZE(MAX_PKT_BURST), 0,
683                                 rte_eth_dev_socket_id(portid));
684                 if (tx_buffer[portid] == NULL)
685                         rte_exit(EXIT_FAILURE, "Cannot allocate buffer for tx on port %u\n",
686                                         portid);
687
688                 rte_eth_tx_buffer_init(tx_buffer[portid], MAX_PKT_BURST);
689
690                 ret = rte_eth_tx_buffer_set_err_callback(tx_buffer[portid],
691                                 rte_eth_tx_buffer_count_callback,
692                                 &port_statistics[portid].dropped);
693                 if (ret < 0)
694                         rte_exit(EXIT_FAILURE,
695                         "Cannot set error callback for tx buffer on port %u\n",
696                                  portid);
697
698                 /* Start device */
699                 ret = rte_eth_dev_start(portid);
700                 if (ret < 0)
701                         rte_exit(EXIT_FAILURE, "rte_eth_dev_start:err=%d, port=%u\n",
702                                   ret, portid);
703
704                 printf("done: \n");
705
706                 rte_eth_promiscuous_enable(portid);
707
708                 printf("Port %u, MAC address: %02X:%02X:%02X:%02X:%02X:%02X\n\n",
709                                 portid,
710                                 l2fwd_ports_eth_addr[portid].addr_bytes[0],
711                                 l2fwd_ports_eth_addr[portid].addr_bytes[1],
712                                 l2fwd_ports_eth_addr[portid].addr_bytes[2],
713                                 l2fwd_ports_eth_addr[portid].addr_bytes[3],
714                                 l2fwd_ports_eth_addr[portid].addr_bytes[4],
715                                 l2fwd_ports_eth_addr[portid].addr_bytes[5]);
716
717                 /* initialize port stats */
718                 memset(&port_statistics, 0, sizeof(port_statistics));
719         }
720
721         if (!nb_ports_available) {
722                 rte_exit(EXIT_FAILURE,
723                         "All available ports are disabled. Please set portmask.\n");
724         }
725
726         check_all_ports_link_status(l2fwd_enabled_port_mask);
727
728         ret = 0;
729         /* launch per-lcore init on every lcore */
730         rte_eal_mp_remote_launch(l2fwd_launch_one_lcore, NULL, CALL_MASTER);
731         RTE_LCORE_FOREACH_SLAVE(lcore_id) {
732                 if (rte_eal_wait_lcore(lcore_id) < 0) {
733                         ret = -1;
734                         break;
735                 }
736         }
737
738         RTE_ETH_FOREACH_DEV(portid) {
739                 if ((l2fwd_enabled_port_mask & (1 << portid)) == 0)
740                         continue;
741                 printf("Closing port %d...", portid);
742                 rte_eth_dev_stop(portid);
743                 rte_eth_dev_close(portid);
744                 printf(" Done\n");
745         }
746         printf("Bye...\n");
747
748         return ret;
749 }