Adding upstream version 18.2.2.upstream/18.2.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

3 files changed, 777 insertions, 0 deletions

diff --git a/src/seastar/dpdk/examples/link_status_interrupt/Makefile b/src/seastar/dpdk/examples/link_status_interrupt/Makefile
new file mode 100644
index 000000000..d12e04782
--- /dev/null
+++ b/src/seastar/dpdk/examples/link_status_interrupt/Makefile
@@ -0,0 +1,55 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright(c) 2010-2014 Intel Corporation
+
+# binary name
+APP = link_status_interrupt
+
+# all source are stored in SRCS-y
+SRCS-y := main.c
+
+# Build using pkg-config variables if possible
+$(shell pkg-config --exists libdpdk)
+ifeq ($(.SHELLSTATUS),0)
+
+all: shared
+.PHONY: shared static
+shared: build/$(APP)-shared
+	ln -sf $(APP)-shared build/$(APP)
+static: build/$(APP)-static
+	ln -sf $(APP)-static build/$(APP)
+
+PC_FILE := $(shell pkg-config --path libdpdk)
+CFLAGS += -O3 $(shell pkg-config --cflags libdpdk)
+LDFLAGS_SHARED = $(shell pkg-config --libs libdpdk)
+LDFLAGS_STATIC = -Wl,-Bstatic $(shell pkg-config --static --libs libdpdk)
+
+build/$(APP)-shared: $(SRCS-y) Makefile $(PC_FILE) | build
+	$(CC) $(CFLAGS) $(SRCS-y) -o $@ $(LDFLAGS) $(LDFLAGS_SHARED)
+
+build/$(APP)-static: $(SRCS-y) Makefile $(PC_FILE) | build
+	$(CC) $(CFLAGS) $(SRCS-y) -o $@ $(LDFLAGS) $(LDFLAGS_STATIC)
+
+build:
+	@mkdir -p $@
+
+.PHONY: clean
+clean:
+	rm -f build/$(APP) build/$(APP)-static build/$(APP)-shared
+	rmdir --ignore-fail-on-non-empty build
+
+else # Build using legacy build system
+
+ifeq ($(RTE_SDK),)
+$(error "Please define RTE_SDK environment variable")
+endif
+
+# Default target, detect a build directory, by looking for a path with a .config
+RTE_TARGET ?= $(notdir $(abspath $(dir $(firstword $(wildcard $(RTE_SDK)/*/.config)))))
+
+include $(RTE_SDK)/mk/rte.vars.mk
+
+CFLAGS += -O3
+CFLAGS += $(WERROR_FLAGS)
+
+include $(RTE_SDK)/mk/rte.extapp.mk
+endif
diff --git a/src/seastar/dpdk/examples/link_status_interrupt/main.c b/src/seastar/dpdk/examples/link_status_interrupt/main.c
new file mode 100644
index 000000000..f3346d23b
--- /dev/null
+++ b/src/seastar/dpdk/examples/link_status_interrupt/main.c
@@ -0,0 +1,711 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2010-2016 Intel Corporation
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h>
+#include <inttypes.h>
+#include <sys/types.h>
+#include <sys/queue.h>
+#include <netinet/in.h>
+#include <setjmp.h>
+#include <stdarg.h>
+#include <ctype.h>
+#include <errno.h>
+#include <getopt.h>
+
+#include <rte_common.h>
+#include <rte_log.h>
+#include <rte_malloc.h>
+#include <rte_memory.h>
+#include <rte_memcpy.h>
+#include <rte_eal.h>
+#include <rte_launch.h>
+#include <rte_atomic.h>
+#include <rte_cycles.h>
+#include <rte_prefetch.h>
+#include <rte_lcore.h>
+#include <rte_per_lcore.h>
+#include <rte_branch_prediction.h>
+#include <rte_interrupts.h>
+#include <rte_random.h>
+#include <rte_debug.h>
+#include <rte_ether.h>
+#include <rte_ethdev.h>
+#include <rte_mempool.h>
+#include <rte_mbuf.h>
+
+#define RTE_LOGTYPE_LSI RTE_LOGTYPE_USER1
+
+#define NB_MBUF   8192
+
+#define MAX_PKT_BURST 32
+#define BURST_TX_DRAIN_US 100 /* TX drain every ~100us */
+
+/*
+ * Configurable number of RX/TX ring descriptors
+ */
+#define RTE_TEST_RX_DESC_DEFAULT 1024
+#define RTE_TEST_TX_DESC_DEFAULT 1024
+static uint16_t nb_rxd = RTE_TEST_RX_DESC_DEFAULT;
+static uint16_t nb_txd = RTE_TEST_TX_DESC_DEFAULT;
+
+/* ethernet addresses of ports */
+static struct ether_addr lsi_ports_eth_addr[RTE_MAX_ETHPORTS];
+
+/* mask of enabled ports */
+static uint32_t lsi_enabled_port_mask = 0;
+
+static unsigned int lsi_rx_queue_per_lcore = 1;
+
+/* destination port for L2 forwarding */
+static unsigned lsi_dst_ports[RTE_MAX_ETHPORTS] = {0};
+
+#define MAX_PKT_BURST 32
+
+#define MAX_RX_QUEUE_PER_LCORE 16
+#define MAX_TX_QUEUE_PER_PORT 16
+struct lcore_queue_conf {
+	unsigned n_rx_port;
+	unsigned rx_port_list[MAX_RX_QUEUE_PER_LCORE];
+	unsigned tx_queue_id;
+} __rte_cache_aligned;
+struct lcore_queue_conf lcore_queue_conf[RTE_MAX_LCORE];
+
+struct rte_eth_dev_tx_buffer *tx_buffer[RTE_MAX_ETHPORTS];
+
+static struct rte_eth_conf port_conf = {
+	.rxmode = {
+		.split_hdr_size = 0,
+	},
+	.txmode = {
+		.mq_mode = ETH_MQ_TX_NONE,
+	},
+	.intr_conf = {
+		.lsc = 1, /**< lsc interrupt feature enabled */
+	},
+};
+
+struct rte_mempool * lsi_pktmbuf_pool = NULL;
+
+/* Per-port statistics struct */
+struct lsi_port_statistics {
+	uint64_t tx;
+	uint64_t rx;
+	uint64_t dropped;
+} __rte_cache_aligned;
+struct lsi_port_statistics port_statistics[RTE_MAX_ETHPORTS];
+
+/* A tsc-based timer responsible for triggering statistics printout */
+#define TIMER_MILLISECOND 2000000ULL /* around 1ms at 2 Ghz */
+#define MAX_TIMER_PERIOD 86400 /* 1 day max */
+static int64_t timer_period = 10 * TIMER_MILLISECOND * 1000; /* default period is 10 seconds */
+
+/* Print out statistics on packets dropped */
+static void
+print_stats(void)
+{
+	struct rte_eth_link link;
+	uint64_t total_packets_dropped, total_packets_tx, total_packets_rx;
+	uint16_t portid;
+
+	total_packets_dropped = 0;
+	total_packets_tx = 0;
+	total_packets_rx = 0;
+
+	const char clr[] = { 27, '[', '2', 'J', '\0' };
+	const char topLeft[] = { 27, '[', '1', ';', '1', 'H','\0' };
+
+		/* Clear screen and move to top left */
+	printf("%s%s", clr, topLeft);
+
+	printf("\nPort statistics ====================================");
+
+	for (portid = 0; portid < RTE_MAX_ETHPORTS; portid++) {
+		/* skip ports that are not enabled */
+		if ((lsi_enabled_port_mask & (1 << portid)) == 0)
+			continue;
+
+		memset(&link, 0, sizeof(link));
+		rte_eth_link_get_nowait(portid, &link);
+		printf("\nStatistics for port %u ------------------------------"
+			   "\nLink status: %25s"
+			   "\nLink speed: %26u"
+			   "\nLink duplex: %25s"
+			   "\nPackets sent: %24"PRIu64
+			   "\nPackets received: %20"PRIu64
+			   "\nPackets dropped: %21"PRIu64,
+			   portid,
+			   (link.link_status ? "Link up" : "Link down"),
+			   (unsigned)link.link_speed,
+			   (link.link_duplex == ETH_LINK_FULL_DUPLEX ? \
+					"full-duplex" : "half-duplex"),
+			   port_statistics[portid].tx,
+			   port_statistics[portid].rx,
+			   port_statistics[portid].dropped);
+
+		total_packets_dropped += port_statistics[portid].dropped;
+		total_packets_tx += port_statistics[portid].tx;
+		total_packets_rx += port_statistics[portid].rx;
+	}
+	printf("\nAggregate statistics ==============================="
+		   "\nTotal packets sent: %18"PRIu64
+		   "\nTotal packets received: %14"PRIu64
+		   "\nTotal packets dropped: %15"PRIu64,
+		   total_packets_tx,
+		   total_packets_rx,
+		   total_packets_dropped);
+	printf("\n====================================================\n");
+}
+
+static void
+lsi_simple_forward(struct rte_mbuf *m, unsigned portid)
+{
+	struct ether_hdr *eth;
+	void *tmp;
+	unsigned dst_port = lsi_dst_ports[portid];
+	int sent;
+	struct rte_eth_dev_tx_buffer *buffer;
+
+	eth = rte_pktmbuf_mtod(m, struct ether_hdr *);
+
+	/* 02:00:00:00:00:xx */
+	tmp = &eth->d_addr.addr_bytes[0];
+	*((uint64_t *)tmp) = 0x000000000002 + ((uint64_t)dst_port << 40);
+
+	/* src addr */
+	ether_addr_copy(&lsi_ports_eth_addr[dst_port], &eth->s_addr);
+
+	buffer = tx_buffer[dst_port];
+	sent = rte_eth_tx_buffer(dst_port, 0, buffer, m);
+	if (sent)
+		port_statistics[dst_port].tx += sent;
+}
+
+/* main processing loop */
+static void
+lsi_main_loop(void)
+{
+	struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
+	struct rte_mbuf *m;
+	unsigned lcore_id;
+	unsigned sent;
+	uint64_t prev_tsc, diff_tsc, cur_tsc, timer_tsc;
+	unsigned i, j, portid, nb_rx;
+	struct lcore_queue_conf *qconf;
+	const uint64_t drain_tsc = (rte_get_tsc_hz() + US_PER_S - 1) / US_PER_S *
+			BURST_TX_DRAIN_US;
+	struct rte_eth_dev_tx_buffer *buffer;
+
+	prev_tsc = 0;
+	timer_tsc = 0;
+
+	lcore_id = rte_lcore_id();
+	qconf = &lcore_queue_conf[lcore_id];
+
+	if (qconf->n_rx_port == 0) {
+		RTE_LOG(INFO, LSI, "lcore %u has nothing to do\n", lcore_id);
+		return;
+	}
+
+	RTE_LOG(INFO, LSI, "entering main loop on lcore %u\n", lcore_id);
+
+	for (i = 0; i < qconf->n_rx_port; i++) {
+
+		portid = qconf->rx_port_list[i];
+		RTE_LOG(INFO, LSI, " -- lcoreid=%u portid=%u\n", lcore_id,
+			portid);
+	}
+
+	while (1) {
+
+		cur_tsc = rte_rdtsc();
+
+		/*
+		 * TX burst queue drain
+		 */
+		diff_tsc = cur_tsc - prev_tsc;
+		if (unlikely(diff_tsc > drain_tsc)) {
+
+			for (i = 0; i < qconf->n_rx_port; i++) {
+
+				portid = lsi_dst_ports[qconf->rx_port_list[i]];
+				buffer = tx_buffer[portid];
+
+				sent = rte_eth_tx_buffer_flush(portid, 0, buffer);
+				if (sent)
+					port_statistics[portid].tx += sent;
+
+			}
+
+			/* if timer is enabled */
+			if (timer_period > 0) {
+
+				/* advance the timer */
+				timer_tsc += diff_tsc;
+
+				/* if timer has reached its timeout */
+				if (unlikely(timer_tsc >= (uint64_t) timer_period)) {
+
+					/* do this only on master core */
+					if (lcore_id == rte_get_master_lcore()) {
+						print_stats();
+						/* reset the timer */
+						timer_tsc = 0;
+					}
+				}
+			}
+
+			prev_tsc = cur_tsc;
+		}
+
+		/*
+		 * Read packet from RX queues
+		 */
+		for (i = 0; i < qconf->n_rx_port; i++) {
+
+			portid = qconf->rx_port_list[i];
+			nb_rx = rte_eth_rx_burst((uint8_t) portid, 0,
+						 pkts_burst, MAX_PKT_BURST);
+
+			port_statistics[portid].rx += nb_rx;
+
+			for (j = 0; j < nb_rx; j++) {
+				m = pkts_burst[j];
+				rte_prefetch0(rte_pktmbuf_mtod(m, void *));
+				lsi_simple_forward(m, portid);
+			}
+		}
+	}
+}
+
+static int
+lsi_launch_one_lcore(__attribute__((unused)) void *dummy)
+{
+	lsi_main_loop();
+	return 0;
+}
+
+/* display usage */
+static void
+lsi_usage(const char *prgname)
+{
+	printf("%s [EAL options] -- -p PORTMASK [-q NQ]\n"
+		"  -p PORTMASK: hexadecimal bitmask of ports to configure\n"
+		"  -q NQ: number of queue (=ports) per lcore (default is 1)\n"
+		"  -T PERIOD: statistics will be refreshed each PERIOD seconds (0 to disable, 10 default, 86400 maximum)\n",
+			prgname);
+}
+
+static int
+lsi_parse_portmask(const char *portmask)
+{
+	char *end = NULL;
+	unsigned long pm;
+
+	/* parse hexadecimal string */
+	pm = strtoul(portmask, &end, 16);
+	if ((portmask[0] == '\0') || (end == NULL) || (*end != '\0'))
+		return -1;
+
+	if (pm == 0)
+		return -1;
+
+	return pm;
+}
+
+static unsigned int
+lsi_parse_nqueue(const char *q_arg)
+{
+	char *end = NULL;
+	unsigned long n;
+
+	/* parse hexadecimal string */
+	n = strtoul(q_arg, &end, 10);
+	if ((q_arg[0] == '\0') || (end == NULL) || (*end != '\0'))
+		return 0;
+	if (n == 0)
+		return 0;
+	if (n >= MAX_RX_QUEUE_PER_LCORE)
+		return 0;
+
+	return n;
+}
+
+static int
+lsi_parse_timer_period(const char *q_arg)
+{
+	char *end = NULL;
+	int n;
+
+	/* parse number string */
+	n = strtol(q_arg, &end, 10);
+	if ((q_arg[0] == '\0') || (end == NULL) || (*end != '\0'))
+		return -1;
+	if (n >= MAX_TIMER_PERIOD)
+		return -1;
+
+	return n;
+}
+
+/* Parse the argument given in the command line of the application */
+static int
+lsi_parse_args(int argc, char **argv)
+{
+	int opt, ret;
+	char **argvopt;
+	int option_index;
+	char *prgname = argv[0];
+	static struct option lgopts[] = {
+		{NULL, 0, 0, 0}
+	};
+
+	argvopt = argv;
+
+	while ((opt = getopt_long(argc, argvopt, "p:q:T:",
+				  lgopts, &option_index)) != EOF) {
+
+		switch (opt) {
+		/* portmask */
+		case 'p':
+			lsi_enabled_port_mask = lsi_parse_portmask(optarg);
+			if (lsi_enabled_port_mask == 0) {
+				printf("invalid portmask\n");
+				lsi_usage(prgname);
+				return -1;
+			}
+			break;
+
+		/* nqueue */
+		case 'q':
+			lsi_rx_queue_per_lcore = lsi_parse_nqueue(optarg);
+			if (lsi_rx_queue_per_lcore == 0) {
+				printf("invalid queue number\n");
+				lsi_usage(prgname);
+				return -1;
+			}
+			break;
+
+		/* timer period */
+		case 'T':
+			timer_period = lsi_parse_timer_period(optarg) * 1000 * TIMER_MILLISECOND;
+			if (timer_period < 0) {
+				printf("invalid timer period\n");
+				lsi_usage(prgname);
+				return -1;
+			}
+			break;
+
+		/* long options */
+		case 0:
+			lsi_usage(prgname);
+			return -1;
+
+		default:
+			lsi_usage(prgname);
+			return -1;
+		}
+	}
+
+	if (optind >= 0)
+		argv[optind-1] = prgname;
+
+	ret = optind-1;
+	optind = 1; /* reset getopt lib */
+	return ret;
+}
+
+/**
+ * It will be called as the callback for specified port after a LSI interrupt
+ * has been fully handled. This callback needs to be implemented carefully as
+ * it will be called in the interrupt host thread which is different from the
+ * application main thread.
+ *
+ * @param port_id
+ *  Port id.
+ * @param type
+ *  event type.
+ * @param param
+ *  Pointer to(address of) the parameters.
+ *
+ * @return
+ *  int.
+ */
+static int
+lsi_event_callback(uint16_t port_id, enum rte_eth_event_type type, void *param,
+		    void *ret_param)
+{
+	struct rte_eth_link link;
+
+	RTE_SET_USED(param);
+	RTE_SET_USED(ret_param);
+
+	printf("\n\nIn registered callback...\n");
+	printf("Event type: %s\n", type == RTE_ETH_EVENT_INTR_LSC ? "LSC interrupt" : "unknown event");
+	rte_eth_link_get_nowait(port_id, &link);
+	if (link.link_status) {
+		printf("Port %d Link Up - speed %u Mbps - %s\n\n",
+				port_id, (unsigned)link.link_speed,
+			(link.link_duplex == ETH_LINK_FULL_DUPLEX) ?
+				("full-duplex") : ("half-duplex"));
+	} else
+		printf("Port %d Link Down\n\n", port_id);
+
+	return 0;
+}
+
+/* Check the link status of all ports in up to 9s, and print them finally */
+static void
+check_all_ports_link_status(uint16_t port_num, uint32_t port_mask)
+{
+#define CHECK_INTERVAL 100 /* 100ms */
+#define MAX_CHECK_TIME 90 /* 9s (90 * 100ms) in total */
+	uint8_t count, all_ports_up, print_flag = 0;
+	uint16_t portid;
+	struct rte_eth_link link;
+
+	printf("\nChecking link status");
+	fflush(stdout);
+	for (count = 0; count <= MAX_CHECK_TIME; count++) {
+		all_ports_up = 1;
+		for (portid = 0; portid < port_num; portid++) {
+			if ((port_mask & (1 << portid)) == 0)
+				continue;
+			memset(&link, 0, sizeof(link));
+			rte_eth_link_get_nowait(portid, &link);
+			/* print link status if flag set */
+			if (print_flag == 1) {
+				if (link.link_status)
+					printf(
+					"Port%d Link Up. Speed %u Mbps - %s\n",
+						portid, link.link_speed,
+				(link.link_duplex == ETH_LINK_FULL_DUPLEX) ?
+					("full-duplex") : ("half-duplex\n"));
+				else
+					printf("Port %d Link Down\n", portid);
+				continue;
+			}
+			/* clear all_ports_up flag if any link down */
+			if (link.link_status == ETH_LINK_DOWN) {
+				all_ports_up = 0;
+				break;
+			}
+		}
+		/* after finally printing all link status, get out */
+		if (print_flag == 1)
+			break;
+
+		if (all_ports_up == 0) {
+			printf(".");
+			fflush(stdout);
+			rte_delay_ms(CHECK_INTERVAL);
+		}
+
+		/* set the print_flag if all ports up or timeout */
+		if (all_ports_up == 1 || count == (MAX_CHECK_TIME - 1)) {
+			print_flag = 1;
+			printf("done\n");
+		}
+	}
+}
+
+int
+main(int argc, char **argv)
+{
+	struct lcore_queue_conf *qconf;
+	int ret;
+	uint16_t nb_ports;
+	uint16_t portid, portid_last = 0;
+	unsigned lcore_id, rx_lcore_id;
+	unsigned nb_ports_in_mask = 0;
+
+	/* init EAL */
+	ret = rte_eal_init(argc, argv);
+	if (ret < 0)
+		rte_exit(EXIT_FAILURE, "rte_eal_init failed");
+	argc -= ret;
+	argv += ret;
+
+	/* parse application arguments (after the EAL ones) */
+	ret = lsi_parse_args(argc, argv);
+	if (ret < 0)
+		rte_exit(EXIT_FAILURE, "Invalid arguments");
+
+	/* create the mbuf pool */
+	lsi_pktmbuf_pool =
+		rte_pktmbuf_pool_create("mbuf_pool", NB_MBUF, 32, 0,
+			RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id());
+	if (lsi_pktmbuf_pool == NULL)
+		rte_panic("Cannot init mbuf pool\n");
+
+	nb_ports = rte_eth_dev_count_avail();
+	if (nb_ports == 0)
+		rte_panic("No Ethernet port - bye\n");
+
+	/*
+	 * Each logical core is assigned a dedicated TX queue on each port.
+	 */
+	for (portid = 0; portid < nb_ports; portid++) {
+		/* skip ports that are not enabled */
+		if ((lsi_enabled_port_mask & (1 << portid)) == 0)
+			continue;
+
+		/* save the destination port id */
+		if (nb_ports_in_mask % 2) {
+			lsi_dst_ports[portid] = portid_last;
+			lsi_dst_ports[portid_last] = portid;
+		}
+		else
+			portid_last = portid;
+
+		nb_ports_in_mask++;
+	}
+	if (nb_ports_in_mask < 2 || nb_ports_in_mask % 2)
+		rte_exit(EXIT_FAILURE, "Current enabled port number is %u, "
+				"but it should be even and at least 2\n",
+				nb_ports_in_mask);
+
+	rx_lcore_id = 0;
+	qconf = &lcore_queue_conf[rx_lcore_id];
+
+	/* Initialize the port/queue configuration of each logical core */
+	for (portid = 0; portid < nb_ports; portid++) {
+		/* skip ports that are not enabled */
+		if ((lsi_enabled_port_mask & (1 << portid)) == 0)
+			continue;
+
+		/* get the lcore_id for this port */
+		while (rte_lcore_is_enabled(rx_lcore_id) == 0 ||
+		       lcore_queue_conf[rx_lcore_id].n_rx_port ==
+		       lsi_rx_queue_per_lcore) {
+
+			rx_lcore_id++;
+			if (rx_lcore_id >= RTE_MAX_LCORE)
+				rte_exit(EXIT_FAILURE, "Not enough cores\n");
+		}
+		if (qconf != &lcore_queue_conf[rx_lcore_id])
+			/* Assigned a new logical core in the loop above. */
+			qconf = &lcore_queue_conf[rx_lcore_id];
+
+		qconf->rx_port_list[qconf->n_rx_port] = portid;
+		qconf->n_rx_port++;
+		printf("Lcore %u: RX port %u\n",rx_lcore_id, (unsigned) portid);
+	}
+
+	/* Initialise each port */
+	for (portid = 0; portid < nb_ports; portid++) {
+		struct rte_eth_rxconf rxq_conf;
+		struct rte_eth_txconf txq_conf;
+		struct rte_eth_conf local_port_conf = port_conf;
+		struct rte_eth_dev_info dev_info;
+
+		/* skip ports that are not enabled */
+		if ((lsi_enabled_port_mask & (1 << portid)) == 0) {
+			printf("Skipping disabled port %u\n", (unsigned) portid);
+			continue;
+		}
+		/* init port */
+		printf("Initializing port %u... ", (unsigned) portid);
+		fflush(stdout);
+		rte_eth_dev_info_get(portid, &dev_info);
+		if (dev_info.tx_offload_capa & DEV_TX_OFFLOAD_MBUF_FAST_FREE)
+			local_port_conf.txmode.offloads |=
+				DEV_TX_OFFLOAD_MBUF_FAST_FREE;
+		ret = rte_eth_dev_configure(portid, 1, 1, &local_port_conf);
+		if (ret < 0)
+			rte_exit(EXIT_FAILURE, "Cannot configure device: err=%d, port=%u\n",
+				  ret, (unsigned) portid);
+
+		ret = rte_eth_dev_adjust_nb_rx_tx_desc(portid, &nb_rxd,
+						       &nb_txd);
+		if (ret < 0)
+			rte_exit(EXIT_FAILURE,
+				 "rte_eth_dev_adjust_nb_rx_tx_desc: err=%d, port=%u\n",
+				 ret, (unsigned) portid);
+
+		/* register lsi interrupt callback, need to be after
+		 * rte_eth_dev_configure(). if (intr_conf.lsc == 0), no
+		 * lsc interrupt will be present, and below callback to
+		 * be registered will never be called.
+		 */
+		rte_eth_dev_callback_register(portid,
+			RTE_ETH_EVENT_INTR_LSC, lsi_event_callback, NULL);
+
+		rte_eth_macaddr_get(portid,
+				    &lsi_ports_eth_addr[portid]);
+
+		/* init one RX queue */
+		fflush(stdout);
+		rxq_conf = dev_info.default_rxconf;
+		rxq_conf.offloads = local_port_conf.rxmode.offloads;
+		ret = rte_eth_rx_queue_setup(portid, 0, nb_rxd,
+					     rte_eth_dev_socket_id(portid),
+					     &rxq_conf,
+					     lsi_pktmbuf_pool);
+		if (ret < 0)
+			rte_exit(EXIT_FAILURE, "rte_eth_rx_queue_setup: err=%d, port=%u\n",
+				  ret, (unsigned) portid);
+
+		/* init one TX queue logical core on each port */
+		fflush(stdout);
+		txq_conf = dev_info.default_txconf;
+		txq_conf.offloads = local_port_conf.txmode.offloads;
+		ret = rte_eth_tx_queue_setup(portid, 0, nb_txd,
+				rte_eth_dev_socket_id(portid),
+				&txq_conf);
+		if (ret < 0)
+			rte_exit(EXIT_FAILURE, "rte_eth_tx_queue_setup: err=%d,port=%u\n",
+				  ret, (unsigned) portid);
+
+		/* Initialize TX buffers */
+		tx_buffer[portid] = rte_zmalloc_socket("tx_buffer",
+				RTE_ETH_TX_BUFFER_SIZE(MAX_PKT_BURST), 0,
+				rte_eth_dev_socket_id(portid));
+		if (tx_buffer[portid] == NULL)
+			rte_exit(EXIT_FAILURE, "Cannot allocate buffer for tx on port %u\n",
+					(unsigned) portid);
+
+		rte_eth_tx_buffer_init(tx_buffer[portid], MAX_PKT_BURST);
+
+		ret = rte_eth_tx_buffer_set_err_callback(tx_buffer[portid],
+				rte_eth_tx_buffer_count_callback,
+				&port_statistics[portid].dropped);
+		if (ret < 0)
+			rte_exit(EXIT_FAILURE, "Cannot set error callback for "
+					"tx buffer on port %u\n", (unsigned) portid);
+
+		/* Start device */
+		ret = rte_eth_dev_start(portid);
+		if (ret < 0)
+			rte_exit(EXIT_FAILURE, "rte_eth_dev_start: err=%d, port=%u\n",
+				  ret, (unsigned) portid);
+		printf("done:\n");
+
+		rte_eth_promiscuous_enable(portid);
+
+		printf("Port %u, MAC address: %02X:%02X:%02X:%02X:%02X:%02X\n\n",
+				(unsigned) portid,
+				lsi_ports_eth_addr[portid].addr_bytes[0],
+				lsi_ports_eth_addr[portid].addr_bytes[1],
+				lsi_ports_eth_addr[portid].addr_bytes[2],
+				lsi_ports_eth_addr[portid].addr_bytes[3],
+				lsi_ports_eth_addr[portid].addr_bytes[4],
+				lsi_ports_eth_addr[portid].addr_bytes[5]);
+
+		/* initialize port stats */
+		memset(&port_statistics, 0, sizeof(port_statistics));
+	}
+
+	check_all_ports_link_status(nb_ports, lsi_enabled_port_mask);
+
+	/* launch per-lcore init on every lcore */
+	rte_eal_mp_remote_launch(lsi_launch_one_lcore, NULL, CALL_MASTER);
+	RTE_LCORE_FOREACH_SLAVE(lcore_id) {
+		if (rte_eal_wait_lcore(lcore_id) < 0)
+			return -1;
+	}
+
+	return 0;
+}
diff --git a/src/seastar/dpdk/examples/link_status_interrupt/meson.build b/src/seastar/dpdk/examples/link_status_interrupt/meson.build
new file mode 100644
index 000000000..c34e11e36
--- /dev/null
+++ b/src/seastar/dpdk/examples/link_status_interrupt/meson.build
@@ -0,0 +1,11 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright(c) 2017 Intel Corporation
+
+# meson file, for building this example as part of a main DPDK build.
+#
+# To build this example as a standalone application with an already-installed
+# DPDK instance, use 'make'
+
+sources = files(
+	'main.c'
+)