main.c revision aab0c291
1/*-
2 *   BSD LICENSE
3 *
4 *   Copyright(c) 2010-2016 Intel Corporation. All rights reserved.
5 *   All rights reserved.
6 *
7 *   Redistribution and use in source and binary forms, with or without
8 *   modification, are permitted provided that the following conditions
9 *   are met:
10 *
11 *     * Redistributions of source code must retain the above copyright
12 *       notice, this list of conditions and the following disclaimer.
13 *     * Redistributions in binary form must reproduce the above copyright
14 *       notice, this list of conditions and the following disclaimer in
15 *       the documentation and/or other materials provided with the
16 *       distribution.
17 *     * Neither the name of Intel Corporation nor the names of its
18 *       contributors may be used to endorse or promote products derived
19 *       from this software without specific prior written permission.
20 *
21 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
24 *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
25 *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
27 *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34#include <stdio.h>
35#include <stdlib.h>
36#include <string.h>
37#include <stdint.h>
38#include <inttypes.h>
39#include <sys/types.h>
40#include <sys/queue.h>
41#include <netinet/in.h>
42#include <setjmp.h>
43#include <stdarg.h>
44#include <ctype.h>
45#include <errno.h>
46#include <getopt.h>
47#include <signal.h>
48#include <stdbool.h>
49
50#include <rte_common.h>
51#include <rte_log.h>
52#include <rte_malloc.h>
53#include <rte_memory.h>
54#include <rte_memcpy.h>
55#include <rte_memzone.h>
56#include <rte_eal.h>
57#include <rte_per_lcore.h>
58#include <rte_launch.h>
59#include <rte_atomic.h>
60#include <rte_cycles.h>
61#include <rte_prefetch.h>
62#include <rte_lcore.h>
63#include <rte_per_lcore.h>
64#include <rte_branch_prediction.h>
65#include <rte_interrupts.h>
66#include <rte_pci.h>
67#include <rte_random.h>
68#include <rte_debug.h>
69#include <rte_ether.h>
70#include <rte_ethdev.h>
71#include <rte_mempool.h>
72#include <rte_mbuf.h>
73
74static volatile bool force_quit;
75
76/* MAC updating enabled by default */
77static int mac_updating = 1;
78
79#define RTE_LOGTYPE_L2FWD RTE_LOGTYPE_USER1
80
81#define NB_MBUF   8192
82
83#define MAX_PKT_BURST 32
84#define BURST_TX_DRAIN_US 100 /* TX drain every ~100us */
85#define MEMPOOL_CACHE_SIZE 256
86
87/*
88 * Configurable number of RX/TX ring descriptors
89 */
90#define RTE_TEST_RX_DESC_DEFAULT 128
91#define RTE_TEST_TX_DESC_DEFAULT 512
92static uint16_t nb_rxd = RTE_TEST_RX_DESC_DEFAULT;
93static uint16_t nb_txd = RTE_TEST_TX_DESC_DEFAULT;
94
95/* ethernet addresses of ports */
96static struct ether_addr l2fwd_ports_eth_addr[RTE_MAX_ETHPORTS];
97
98/* mask of enabled ports */
99static uint32_t l2fwd_enabled_port_mask = 0;
100
101/* list of enabled ports */
102static uint32_t l2fwd_dst_ports[RTE_MAX_ETHPORTS];
103
104static unsigned int l2fwd_rx_queue_per_lcore = 1;
105
106#define MAX_RX_QUEUE_PER_LCORE 16
107#define MAX_TX_QUEUE_PER_PORT 16
108struct lcore_queue_conf {
109	unsigned n_rx_port;
110	unsigned rx_port_list[MAX_RX_QUEUE_PER_LCORE];
111} __rte_cache_aligned;
112struct lcore_queue_conf lcore_queue_conf[RTE_MAX_LCORE];
113
114static struct rte_eth_dev_tx_buffer *tx_buffer[RTE_MAX_ETHPORTS];
115
116static const struct rte_eth_conf port_conf = {
117	.rxmode = {
118		.split_hdr_size = 0,
119		.header_split   = 0, /**< Header Split disabled */
120		.hw_ip_checksum = 0, /**< IP checksum offload disabled */
121		.hw_vlan_filter = 0, /**< VLAN filtering disabled */
122		.jumbo_frame    = 0, /**< Jumbo Frame Support disabled */
123		.hw_strip_crc   = 1, /**< CRC stripped by hardware */
124	},
125	.txmode = {
126		.mq_mode = ETH_MQ_TX_NONE,
127	},
128};
129
130struct rte_mempool * l2fwd_pktmbuf_pool = NULL;
131
132/* Per-port statistics struct */
133struct l2fwd_port_statistics {
134	uint64_t tx;
135	uint64_t rx;
136	uint64_t dropped;
137} __rte_cache_aligned;
138struct l2fwd_port_statistics port_statistics[RTE_MAX_ETHPORTS];
139
140#define MAX_TIMER_PERIOD 86400 /* 1 day max */
141/* A tsc-based timer responsible for triggering statistics printout */
142static uint64_t timer_period = 10; /* default period is 10 seconds */
143
144/* Print out statistics on packets dropped */
145static void
146print_stats(void)
147{
148	uint64_t total_packets_dropped, total_packets_tx, total_packets_rx;
149	unsigned portid;
150
151	total_packets_dropped = 0;
152	total_packets_tx = 0;
153	total_packets_rx = 0;
154
155	const char clr[] = { 27, '[', '2', 'J', '\0' };
156	const char topLeft[] = { 27, '[', '1', ';', '1', 'H','\0' };
157
158		/* Clear screen and move to top left */
159	printf("%s%s", clr, topLeft);
160
161	printf("\nPort statistics ====================================");
162
163	for (portid = 0; portid < RTE_MAX_ETHPORTS; portid++) {
164		/* skip disabled ports */
165		if ((l2fwd_enabled_port_mask & (1 << portid)) == 0)
166			continue;
167		printf("\nStatistics for port %u ------------------------------"
168			   "\nPackets sent: %24"PRIu64
169			   "\nPackets received: %20"PRIu64
170			   "\nPackets dropped: %21"PRIu64,
171			   portid,
172			   port_statistics[portid].tx,
173			   port_statistics[portid].rx,
174			   port_statistics[portid].dropped);
175
176		total_packets_dropped += port_statistics[portid].dropped;
177		total_packets_tx += port_statistics[portid].tx;
178		total_packets_rx += port_statistics[portid].rx;
179	}
180	printf("\nAggregate statistics ==============================="
181		   "\nTotal packets sent: %18"PRIu64
182		   "\nTotal packets received: %14"PRIu64
183		   "\nTotal packets dropped: %15"PRIu64,
184		   total_packets_tx,
185		   total_packets_rx,
186		   total_packets_dropped);
187	printf("\n====================================================\n");
188}
189
190static void
191l2fwd_mac_updating(struct rte_mbuf *m, unsigned dest_portid)
192{
193	struct ether_hdr *eth;
194	void *tmp;
195
196	eth = rte_pktmbuf_mtod(m, struct ether_hdr *);
197
198	/* 02:00:00:00:00:xx */
199	tmp = &eth->d_addr.addr_bytes[0];
200	*((uint64_t *)tmp) = 0x000000000002 + ((uint64_t)dest_portid << 40);
201
202	/* src addr */
203	ether_addr_copy(&l2fwd_ports_eth_addr[dest_portid], &eth->s_addr);
204}
205
206static void
207l2fwd_simple_forward(struct rte_mbuf *m, unsigned portid)
208{
209	unsigned dst_port;
210	int sent;
211	struct rte_eth_dev_tx_buffer *buffer;
212
213	dst_port = l2fwd_dst_ports[portid];
214
215	if (mac_updating)
216		l2fwd_mac_updating(m, dst_port);
217
218	buffer = tx_buffer[dst_port];
219	sent = rte_eth_tx_buffer(dst_port, 0, buffer, m);
220	if (sent)
221		port_statistics[dst_port].tx += sent;
222}
223
224/* main processing loop */
225static void
226l2fwd_main_loop(void)
227{
228	struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
229	struct rte_mbuf *m;
230	int sent;
231	unsigned lcore_id;
232	uint64_t prev_tsc, diff_tsc, cur_tsc, timer_tsc;
233	unsigned i, j, portid, nb_rx;
234	struct lcore_queue_conf *qconf;
235	const uint64_t drain_tsc = (rte_get_tsc_hz() + US_PER_S - 1) / US_PER_S *
236			BURST_TX_DRAIN_US;
237	struct rte_eth_dev_tx_buffer *buffer;
238
239	prev_tsc = 0;
240	timer_tsc = 0;
241
242	lcore_id = rte_lcore_id();
243	qconf = &lcore_queue_conf[lcore_id];
244
245	if (qconf->n_rx_port == 0) {
246		RTE_LOG(INFO, L2FWD, "lcore %u has nothing to do\n", lcore_id);
247		return;
248	}
249
250	RTE_LOG(INFO, L2FWD, "entering main loop on lcore %u\n", lcore_id);
251
252	for (i = 0; i < qconf->n_rx_port; i++) {
253
254		portid = qconf->rx_port_list[i];
255		RTE_LOG(INFO, L2FWD, " -- lcoreid=%u portid=%u\n", lcore_id,
256			portid);
257
258	}
259
260	while (!force_quit) {
261
262		cur_tsc = rte_rdtsc();
263
264		/*
265		 * TX burst queue drain
266		 */
267		diff_tsc = cur_tsc - prev_tsc;
268		if (unlikely(diff_tsc > drain_tsc)) {
269
270			for (i = 0; i < qconf->n_rx_port; i++) {
271
272				portid = l2fwd_dst_ports[qconf->rx_port_list[i]];
273				buffer = tx_buffer[portid];
274
275				sent = rte_eth_tx_buffer_flush(portid, 0, buffer);
276				if (sent)
277					port_statistics[portid].tx += sent;
278
279			}
280
281			/* if timer is enabled */
282			if (timer_period > 0) {
283
284				/* advance the timer */
285				timer_tsc += diff_tsc;
286
287				/* if timer has reached its timeout */
288				if (unlikely(timer_tsc >= timer_period)) {
289
290					/* do this only on master core */
291					if (lcore_id == rte_get_master_lcore()) {
292						print_stats();
293						/* reset the timer */
294						timer_tsc = 0;
295					}
296				}
297			}
298
299			prev_tsc = cur_tsc;
300		}
301
302		/*
303		 * Read packet from RX queues
304		 */
305		for (i = 0; i < qconf->n_rx_port; i++) {
306
307			portid = qconf->rx_port_list[i];
308			nb_rx = rte_eth_rx_burst((uint8_t) portid, 0,
309						 pkts_burst, MAX_PKT_BURST);
310
311			port_statistics[portid].rx += nb_rx;
312
313			for (j = 0; j < nb_rx; j++) {
314				m = pkts_burst[j];
315				rte_prefetch0(rte_pktmbuf_mtod(m, void *));
316				l2fwd_simple_forward(m, portid);
317			}
318		}
319	}
320}
321
322static int
323l2fwd_launch_one_lcore(__attribute__((unused)) void *dummy)
324{
325	l2fwd_main_loop();
326	return 0;
327}
328
329/* display usage */
330static void
331l2fwd_usage(const char *prgname)
332{
333	printf("%s [EAL options] -- -p PORTMASK [-q NQ]\n"
334	       "  -p PORTMASK: hexadecimal bitmask of ports to configure\n"
335	       "  -q NQ: number of queue (=ports) per lcore (default is 1)\n"
336		   "  -T PERIOD: statistics will be refreshed each PERIOD seconds (0 to disable, 10 default, 86400 maximum)\n"
337		   "  --[no-]mac-updating: Enable or disable MAC addresses updating (enabled by default)\n"
338		   "      When enabled:\n"
339		   "       - The source MAC address is replaced by the TX port MAC address\n"
340		   "       - The destination MAC address is replaced by 02:00:00:00:00:TX_PORT_ID\n",
341	       prgname);
342}
343
344static int
345l2fwd_parse_portmask(const char *portmask)
346{
347	char *end = NULL;
348	unsigned long pm;
349
350	/* parse hexadecimal string */
351	pm = strtoul(portmask, &end, 16);
352	if ((portmask[0] == '\0') || (end == NULL) || (*end != '\0'))
353		return -1;
354
355	if (pm == 0)
356		return -1;
357
358	return pm;
359}
360
361static unsigned int
362l2fwd_parse_nqueue(const char *q_arg)
363{
364	char *end = NULL;
365	unsigned long n;
366
367	/* parse hexadecimal string */
368	n = strtoul(q_arg, &end, 10);
369	if ((q_arg[0] == '\0') || (end == NULL) || (*end != '\0'))
370		return 0;
371	if (n == 0)
372		return 0;
373	if (n >= MAX_RX_QUEUE_PER_LCORE)
374		return 0;
375
376	return n;
377}
378
379static int
380l2fwd_parse_timer_period(const char *q_arg)
381{
382	char *end = NULL;
383	int n;
384
385	/* parse number string */
386	n = strtol(q_arg, &end, 10);
387	if ((q_arg[0] == '\0') || (end == NULL) || (*end != '\0'))
388		return -1;
389	if (n >= MAX_TIMER_PERIOD)
390		return -1;
391
392	return n;
393}
394
395/* Parse the argument given in the command line of the application */
396static int
397l2fwd_parse_args(int argc, char **argv)
398{
399	int opt, ret, timer_secs;
400	char **argvopt;
401	int option_index;
402	char *prgname = argv[0];
403	static struct option lgopts[] = {
404		{ "mac-updating", no_argument, &mac_updating, 1},
405		{ "no-mac-updating", no_argument, &mac_updating, 0},
406		{NULL, 0, 0, 0}
407	};
408
409	argvopt = argv;
410
411	while ((opt = getopt_long(argc, argvopt, "p:q:T:",
412				  lgopts, &option_index)) != EOF) {
413
414		switch (opt) {
415		/* portmask */
416		case 'p':
417			l2fwd_enabled_port_mask = l2fwd_parse_portmask(optarg);
418			if (l2fwd_enabled_port_mask == 0) {
419				printf("invalid portmask\n");
420				l2fwd_usage(prgname);
421				return -1;
422			}
423			break;
424
425		/* nqueue */
426		case 'q':
427			l2fwd_rx_queue_per_lcore = l2fwd_parse_nqueue(optarg);
428			if (l2fwd_rx_queue_per_lcore == 0) {
429				printf("invalid queue number\n");
430				l2fwd_usage(prgname);
431				return -1;
432			}
433			break;
434
435		/* timer period */
436		case 'T':
437			timer_secs = l2fwd_parse_timer_period(optarg);
438			if (timer_secs < 0) {
439				printf("invalid timer period\n");
440				l2fwd_usage(prgname);
441				return -1;
442			}
443			timer_period = timer_secs;
444			break;
445
446		/* long options */
447		case 0:
448			break;
449
450		default:
451			l2fwd_usage(prgname);
452			return -1;
453		}
454	}
455
456	if (optind >= 0)
457		argv[optind-1] = prgname;
458
459	ret = optind-1;
460	optind = 0; /* reset getopt lib */
461	return ret;
462}
463
464/* Check the link status of all ports in up to 9s, and print them finally */
465static void
466check_all_ports_link_status(uint8_t port_num, uint32_t port_mask)
467{
468#define CHECK_INTERVAL 100 /* 100ms */
469#define MAX_CHECK_TIME 90 /* 9s (90 * 100ms) in total */
470	uint8_t portid, count, all_ports_up, print_flag = 0;
471	struct rte_eth_link link;
472
473	printf("\nChecking link status");
474	fflush(stdout);
475	for (count = 0; count <= MAX_CHECK_TIME; count++) {
476		if (force_quit)
477			return;
478		all_ports_up = 1;
479		for (portid = 0; portid < port_num; portid++) {
480			if (force_quit)
481				return;
482			if ((port_mask & (1 << portid)) == 0)
483				continue;
484			memset(&link, 0, sizeof(link));
485			rte_eth_link_get_nowait(portid, &link);
486			/* print link status if flag set */
487			if (print_flag == 1) {
488				if (link.link_status)
489					printf("Port %d Link Up - speed %u "
490						"Mbps - %s\n", (uint8_t)portid,
491						(unsigned)link.link_speed,
492				(link.link_duplex == ETH_LINK_FULL_DUPLEX) ?
493					("full-duplex") : ("half-duplex\n"));
494				else
495					printf("Port %d Link Down\n",
496						(uint8_t)portid);
497				continue;
498			}
499			/* clear all_ports_up flag if any link down */
500			if (link.link_status == ETH_LINK_DOWN) {
501				all_ports_up = 0;
502				break;
503			}
504		}
505		/* after finally printing all link status, get out */
506		if (print_flag == 1)
507			break;
508
509		if (all_ports_up == 0) {
510			printf(".");
511			fflush(stdout);
512			rte_delay_ms(CHECK_INTERVAL);
513		}
514
515		/* set the print_flag if all ports up or timeout */
516		if (all_ports_up == 1 || count == (MAX_CHECK_TIME - 1)) {
517			print_flag = 1;
518			printf("done\n");
519		}
520	}
521}
522
523static void
524signal_handler(int signum)
525{
526	if (signum == SIGINT || signum == SIGTERM) {
527		printf("\n\nSignal %d received, preparing to exit...\n",
528				signum);
529		force_quit = true;
530	}
531}
532
533int
534main(int argc, char **argv)
535{
536	struct lcore_queue_conf *qconf;
537	struct rte_eth_dev_info dev_info;
538	int ret;
539	uint8_t nb_ports;
540	uint8_t nb_ports_available;
541	uint8_t portid, last_port;
542	unsigned lcore_id, rx_lcore_id;
543	unsigned nb_ports_in_mask = 0;
544
545	/* init EAL */
546	ret = rte_eal_init(argc, argv);
547	if (ret < 0)
548		rte_exit(EXIT_FAILURE, "Invalid EAL arguments\n");
549	argc -= ret;
550	argv += ret;
551
552	force_quit = false;
553	signal(SIGINT, signal_handler);
554	signal(SIGTERM, signal_handler);
555
556	/* parse application arguments (after the EAL ones) */
557	ret = l2fwd_parse_args(argc, argv);
558	if (ret < 0)
559		rte_exit(EXIT_FAILURE, "Invalid L2FWD arguments\n");
560
561	printf("MAC updating %s\n", mac_updating ? "enabled" : "disabled");
562
563	/* convert to number of cycles */
564	timer_period *= rte_get_timer_hz();
565
566	/* create the mbuf pool */
567	l2fwd_pktmbuf_pool = rte_pktmbuf_pool_create("mbuf_pool", NB_MBUF,
568		MEMPOOL_CACHE_SIZE, 0, RTE_MBUF_DEFAULT_BUF_SIZE,
569		rte_socket_id());
570	if (l2fwd_pktmbuf_pool == NULL)
571		rte_exit(EXIT_FAILURE, "Cannot init mbuf pool\n");
572
573	nb_ports = rte_eth_dev_count();
574	if (nb_ports == 0)
575		rte_exit(EXIT_FAILURE, "No Ethernet ports - bye\n");
576
577	/* reset l2fwd_dst_ports */
578	for (portid = 0; portid < RTE_MAX_ETHPORTS; portid++)
579		l2fwd_dst_ports[portid] = 0;
580	last_port = 0;
581
582	/*
583	 * Each logical core is assigned a dedicated TX queue on each port.
584	 */
585	for (portid = 0; portid < nb_ports; portid++) {
586		/* skip ports that are not enabled */
587		if ((l2fwd_enabled_port_mask & (1 << portid)) == 0)
588			continue;
589
590		if (nb_ports_in_mask % 2) {
591			l2fwd_dst_ports[portid] = last_port;
592			l2fwd_dst_ports[last_port] = portid;
593		}
594		else
595			last_port = portid;
596
597		nb_ports_in_mask++;
598
599		rte_eth_dev_info_get(portid, &dev_info);
600	}
601	if (nb_ports_in_mask % 2) {
602		printf("Notice: odd number of ports in portmask.\n");
603		l2fwd_dst_ports[last_port] = last_port;
604	}
605
606	rx_lcore_id = 0;
607	qconf = NULL;
608
609	/* Initialize the port/queue configuration of each logical core */
610	for (portid = 0; portid < nb_ports; portid++) {
611		/* skip ports that are not enabled */
612		if ((l2fwd_enabled_port_mask & (1 << portid)) == 0)
613			continue;
614
615		/* get the lcore_id for this port */
616		while (rte_lcore_is_enabled(rx_lcore_id) == 0 ||
617		       lcore_queue_conf[rx_lcore_id].n_rx_port ==
618		       l2fwd_rx_queue_per_lcore) {
619			rx_lcore_id++;
620			if (rx_lcore_id >= RTE_MAX_LCORE)
621				rte_exit(EXIT_FAILURE, "Not enough cores\n");
622		}
623
624		if (qconf != &lcore_queue_conf[rx_lcore_id])
625			/* Assigned a new logical core in the loop above. */
626			qconf = &lcore_queue_conf[rx_lcore_id];
627
628		qconf->rx_port_list[qconf->n_rx_port] = portid;
629		qconf->n_rx_port++;
630		printf("Lcore %u: RX port %u\n", rx_lcore_id, (unsigned) portid);
631	}
632
633	nb_ports_available = nb_ports;
634
635	/* Initialise each port */
636	for (portid = 0; portid < nb_ports; portid++) {
637		/* skip ports that are not enabled */
638		if ((l2fwd_enabled_port_mask & (1 << portid)) == 0) {
639			printf("Skipping disabled port %u\n", (unsigned) portid);
640			nb_ports_available--;
641			continue;
642		}
643		/* init port */
644		printf("Initializing port %u... ", (unsigned) portid);
645		fflush(stdout);
646		ret = rte_eth_dev_configure(portid, 1, 1, &port_conf);
647		if (ret < 0)
648			rte_exit(EXIT_FAILURE, "Cannot configure device: err=%d, port=%u\n",
649				  ret, (unsigned) portid);
650
651		rte_eth_macaddr_get(portid,&l2fwd_ports_eth_addr[portid]);
652
653		/* init one RX queue */
654		fflush(stdout);
655		ret = rte_eth_rx_queue_setup(portid, 0, nb_rxd,
656					     rte_eth_dev_socket_id(portid),
657					     NULL,
658					     l2fwd_pktmbuf_pool);
659		if (ret < 0)
660			rte_exit(EXIT_FAILURE, "rte_eth_rx_queue_setup:err=%d, port=%u\n",
661				  ret, (unsigned) portid);
662
663		/* init one TX queue on each port */
664		fflush(stdout);
665		ret = rte_eth_tx_queue_setup(portid, 0, nb_txd,
666				rte_eth_dev_socket_id(portid),
667				NULL);
668		if (ret < 0)
669			rte_exit(EXIT_FAILURE, "rte_eth_tx_queue_setup:err=%d, port=%u\n",
670				ret, (unsigned) portid);
671
672		/* Initialize TX buffers */
673		tx_buffer[portid] = rte_zmalloc_socket("tx_buffer",
674				RTE_ETH_TX_BUFFER_SIZE(MAX_PKT_BURST), 0,
675				rte_eth_dev_socket_id(portid));
676		if (tx_buffer[portid] == NULL)
677			rte_exit(EXIT_FAILURE, "Cannot allocate buffer for tx on port %u\n",
678					(unsigned) portid);
679
680		rte_eth_tx_buffer_init(tx_buffer[portid], MAX_PKT_BURST);
681
682		ret = rte_eth_tx_buffer_set_err_callback(tx_buffer[portid],
683				rte_eth_tx_buffer_count_callback,
684				&port_statistics[portid].dropped);
685		if (ret < 0)
686				rte_exit(EXIT_FAILURE, "Cannot set error callback for "
687						"tx buffer on port %u\n", (unsigned) portid);
688
689		/* Start device */
690		ret = rte_eth_dev_start(portid);
691		if (ret < 0)
692			rte_exit(EXIT_FAILURE, "rte_eth_dev_start:err=%d, port=%u\n",
693				  ret, (unsigned) portid);
694
695		printf("done: \n");
696
697		rte_eth_promiscuous_enable(portid);
698
699		printf("Port %u, MAC address: %02X:%02X:%02X:%02X:%02X:%02X\n\n",
700				(unsigned) portid,
701				l2fwd_ports_eth_addr[portid].addr_bytes[0],
702				l2fwd_ports_eth_addr[portid].addr_bytes[1],
703				l2fwd_ports_eth_addr[portid].addr_bytes[2],
704				l2fwd_ports_eth_addr[portid].addr_bytes[3],
705				l2fwd_ports_eth_addr[portid].addr_bytes[4],
706				l2fwd_ports_eth_addr[portid].addr_bytes[5]);
707
708		/* initialize port stats */
709		memset(&port_statistics, 0, sizeof(port_statistics));
710	}
711
712	if (!nb_ports_available) {
713		rte_exit(EXIT_FAILURE,
714			"All available ports are disabled. Please set portmask.\n");
715	}
716
717	check_all_ports_link_status(nb_ports, l2fwd_enabled_port_mask);
718
719	ret = 0;
720	/* launch per-lcore init on every lcore */
721	rte_eal_mp_remote_launch(l2fwd_launch_one_lcore, NULL, CALL_MASTER);
722	RTE_LCORE_FOREACH_SLAVE(lcore_id) {
723		if (rte_eal_wait_lcore(lcore_id) < 0) {
724			ret = -1;
725			break;
726		}
727	}
728
729	for (portid = 0; portid < nb_ports; portid++) {
730		if ((l2fwd_enabled_port_mask & (1 << portid)) == 0)
731			continue;
732		printf("Closing port %d...", portid);
733		rte_eth_dev_stop(portid);
734		rte_eth_dev_close(portid);
735		printf(" Done\n");
736	}
737	printf("Bye...\n");
738
739	return ret;
740}
741