DPDK  20.11.3
examples/link_status_interrupt/main.c
/* 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_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 rte_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;
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 = {
},
.txmode = {
.mq_mode = ETH_MQ_TX_NONE,
},
.intr_conf = {
.lsc = 1,
},
};
struct rte_mempool * lsi_pktmbuf_pool = NULL;
/* Per-port statistics struct */
struct lsi_port_statistics {
uint64_t tx;
uint64_t rx;
uint64_t dropped;
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' };
int link_get_err;
/* 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));
link_get_err = rte_eth_link_get_nowait(portid, &link);
printf("\nStatistics for port %u ------------------------------"
"\nLink status: %25s"
"\nLink speed: %26s"
"\nLink duplex: %25s"
"\nPackets sent: %24"PRIu64
"\nPackets received: %20"PRIu64
"\nPackets dropped: %21"PRIu64,
portid,
link_get_err < 0 ? "Link get failed" :
(link.link_status ? "Link up" : "Link down"),
link_get_err < 0 ? "0" :
rte_eth_link_speed_to_str(link.link_speed),
link_get_err < 0 ? "Link get failed" :
(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");
fflush(stdout);
}
static void
lsi_simple_forward(struct rte_mbuf *m, unsigned portid)
{
struct rte_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 rte_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 */
rte_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 main core */
if (lcore_id == rte_get_main_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];
lsi_simple_forward(m, portid);
}
}
}
}
static int
lsi_launch_one_lcore(__rte_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 0;
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;
}
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;
int ret;
char link_status_text[RTE_ETH_LINK_MAX_STR_LEN];
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");
ret = rte_eth_link_get_nowait(port_id, &link);
if (ret < 0) {
printf("Failed link get on port %d: %s\n",
port_id, rte_strerror(-ret));
return ret;
}
rte_eth_link_to_str(link_status_text, sizeof(link_status_text), &link);
printf("Port %d %s\n\n", port_id, link_status_text);
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;
int ret;
char link_status_text[RTE_ETH_LINK_MAX_STR_LEN];
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));
ret = rte_eth_link_get_nowait(portid, &link);
if (ret < 0) {
all_ports_up = 0;
if (print_flag == 1)
printf("Port %u link get failed: %s\n",
portid, rte_strerror(-ret));
continue;
}
/* print link status if flag set */
if (print_flag == 1) {
rte_eth_link_to_str(link_status_text,
sizeof(link_status_text), &link);
printf("Port %d %s", portid,
link_status_text);
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");
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);
ret = rte_eth_dev_info_get(portid, &dev_info);
if (ret != 0)
rte_exit(EXIT_FAILURE,
"Error during getting device (port %u) info: %s\n",
portid, strerror(-ret));
if (dev_info.tx_offload_capa & DEV_TX_OFFLOAD_MBUF_FAST_FREE)
local_port_conf.txmode.offloads |=
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_EVENT_INTR_LSC, lsi_event_callback, NULL);
ret = rte_eth_macaddr_get(portid,
&lsi_ports_eth_addr[portid]);
if (ret < 0)
rte_exit(EXIT_FAILURE,
"rte_eth_macaddr_get: err=%d, port=%u\n",
ret, (unsigned int)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,
&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,
&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,
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],
&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");
if (ret != 0)
rte_exit(EXIT_FAILURE,
"rte_eth_promiscuous_enable: err=%s, port=%u\n",
rte_strerror(-ret), 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_MAIN);
if (rte_eal_wait_lcore(lcore_id) < 0)
return -1;
}
/* clean up the EAL */
return 0;
}