examples/ethtool/ethtool-app/main.c

/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2015 Intel Corporation
 */


#include <stdio.h>
#include <stdlib.h>

#include <rte_common.h>
#include <rte_spinlock.h>
#include <rte_eal.h>
#include <rte_ethdev.h>
#include <rte_ether.h>
#include <rte_ip.h>
#include <rte_memory.h>
#include <rte_mempool.h>
#include <rte_mbuf.h>

#include "ethapp.h"

#define MAX_PORTS RTE_MAX_ETHPORTS
#define MAX_BURST_LENGTH 32
#define PORT_RX_QUEUE_SIZE 1024
#define PORT_TX_QUEUE_SIZE 1024
#define PKTPOOL_EXTRA_SIZE 512
#define PKTPOOL_CACHE 32


struct txq_port {
    uint16_t cnt_unsent;
    struct rte_mbuf *buf_frames[MAX_BURST_LENGTH];
};

struct app_port {
    struct ether_addr mac_addr;
    struct txq_port txq;
    rte_spinlock_t lock;
    int port_active;
    int port_dirty;
    int idx_port;
    struct rte_mempool *pkt_pool;
};

struct app_config {
    struct app_port ports[MAX_PORTS];
    int cnt_ports;
    int exit_now;
};


struct app_config app_cfg;


void lock_port(int idx_port)
{
    struct app_port *ptr_port = &app_cfg.ports[idx_port];

    rte_spinlock_lock(&ptr_port->lock);
}

void unlock_port(int idx_port)
{
    struct app_port *ptr_port = &app_cfg.ports[idx_port];

    rte_spinlock_unlock(&ptr_port->lock);
}

void mark_port_active(int idx_port)
{
    struct app_port *ptr_port = &app_cfg.ports[idx_port];

    ptr_port->port_active = 1;
}

void mark_port_inactive(int idx_port)
{
    struct app_port *ptr_port = &app_cfg.ports[idx_port];

    ptr_port->port_active = 0;
}

void mark_port_newmac(int idx_port)
{
    struct app_port *ptr_port = &app_cfg.ports[idx_port];

    ptr_port->port_dirty = 1;
}

static void setup_ports(struct app_config *app_cfg, int cnt_ports)
{
    int idx_port;
    int size_pktpool;
    struct rte_eth_conf cfg_port;
    struct rte_eth_dev_info dev_info;
    char str_name[16];
    uint16_t nb_rxd = PORT_RX_QUEUE_SIZE;
    uint16_t nb_txd = PORT_TX_QUEUE_SIZE;
    struct rte_eth_txconf txconf;

    memset(&cfg_port, 0, sizeof(cfg_port));
    cfg_port.txmode.mq_mode = ETH_MQ_TX_NONE;

    for (idx_port = 0; idx_port < cnt_ports; idx_port++) {
        struct app_port *ptr_port = &app_cfg->ports[idx_port];

        rte_eth_dev_info_get(idx_port, &dev_info);
        size_pktpool = dev_info.rx_desc_lim.nb_max +
            dev_info.tx_desc_lim.nb_max + PKTPOOL_EXTRA_SIZE;

        snprintf(str_name, 16, "pkt_pool%i", idx_port);
        ptr_port->pkt_pool = rte_pktmbuf_pool_create(
            str_name,
            size_pktpool, PKTPOOL_CACHE,
            0,
            RTE_MBUF_DEFAULT_BUF_SIZE,
            rte_socket_id()
            );
        if (ptr_port->pkt_pool == NULL)
            rte_exit(EXIT_FAILURE,
                "rte_pktmbuf_pool_create failed"
                );

        printf("Init port %i..\n", idx_port);
        ptr_port->port_active = 1;
        ptr_port->port_dirty = 0;
        ptr_port->idx_port = idx_port;

        if (rte_eth_dev_configure(idx_port, 1, 1, &cfg_port) < 0)
            rte_exit(EXIT_FAILURE,
                 "rte_eth_dev_configure failed");
        if (rte_eth_dev_adjust_nb_rx_tx_desc(idx_port, &nb_rxd,
                             &nb_txd) < 0)
            rte_exit(EXIT_FAILURE,
                 "rte_eth_dev_adjust_nb_rx_tx_desc failed");

        if (rte_eth_rx_queue_setup(
                idx_port, 0, nb_rxd,
                rte_eth_dev_socket_id(idx_port), NULL,
                ptr_port->pkt_pool) < 0)
            rte_exit(EXIT_FAILURE,
                 "rte_eth_rx_queue_setup failed"
                );
        txconf = dev_info.default_txconf;
        if (rte_eth_tx_queue_setup(
                idx_port, 0, nb_txd,
                rte_eth_dev_socket_id(idx_port), &txconf) < 0)
            rte_exit(EXIT_FAILURE,
                 "rte_eth_tx_queue_setup failed"
                );
        if (rte_eth_dev_start(idx_port) < 0)
            rte_exit(EXIT_FAILURE,
                 "%s:%i: rte_eth_dev_start failed",
                 __FILE__, __LINE__
                );
        rte_eth_macaddr_get(idx_port, &ptr_port->mac_addr);
        rte_spinlock_init(&ptr_port->lock);
    }
}

static void process_frame(struct app_port *ptr_port,
    struct rte_mbuf *ptr_frame)
{
    struct ether_hdr *ptr_mac_hdr;

    ptr_mac_hdr = rte_pktmbuf_mtod(ptr_frame, struct ether_hdr *);
    ether_addr_copy(&ptr_mac_hdr->s_addr, &ptr_mac_hdr->d_addr);
    ether_addr_copy(&ptr_port->mac_addr, &ptr_mac_hdr->s_addr);
}

static int slave_main(__attribute__((unused)) void *ptr_data)
{
    struct app_port *ptr_port;
    struct rte_mbuf *ptr_frame;
    struct txq_port *txq;

    uint16_t cnt_recv_frames;
    uint16_t idx_frame;
    uint16_t cnt_sent;
    uint16_t idx_port;
    uint16_t lock_result;

    while (app_cfg.exit_now == 0) {
        for (idx_port = 0; idx_port < app_cfg.cnt_ports; idx_port++) {
            /* Check that port is active and unlocked */
            ptr_port = &app_cfg.ports[idx_port];
            lock_result = rte_spinlock_trylock(&ptr_port->lock);
            if (lock_result == 0)
                continue;
            if (ptr_port->port_active == 0) {
                rte_spinlock_unlock(&ptr_port->lock);
                continue;
            }
            txq = &ptr_port->txq;

            /* MAC address was updated */
            if (ptr_port->port_dirty == 1) {
                rte_eth_macaddr_get(ptr_port->idx_port,
                    &ptr_port->mac_addr);
                ptr_port->port_dirty = 0;
            }

            /* Incoming frames */
            cnt_recv_frames = rte_eth_rx_burst(
                ptr_port->idx_port, 0,
                &txq->buf_frames[txq->cnt_unsent],
                RTE_DIM(txq->buf_frames) - txq->cnt_unsent
                );
            if (cnt_recv_frames > 0) {
                for (idx_frame = 0;
                    idx_frame < cnt_recv_frames;
                    idx_frame++) {
                    ptr_frame = txq->buf_frames[
                        idx_frame + txq->cnt_unsent];
                    process_frame(ptr_port, ptr_frame);
                }
                txq->cnt_unsent += cnt_recv_frames;
            }

            /* Outgoing frames */
            if (txq->cnt_unsent > 0) {
                cnt_sent = rte_eth_tx_burst(
                    ptr_port->idx_port, 0,
                    txq->buf_frames,
                    txq->cnt_unsent
                    );
                /* Shuffle up unsent frame pointers */
                for (idx_frame = cnt_sent;
                    idx_frame < txq->cnt_unsent;
                    idx_frame++)
                    txq->buf_frames[idx_frame - cnt_sent] =
                        txq->buf_frames[idx_frame];
                txq->cnt_unsent -= cnt_sent;
            }
            rte_spinlock_unlock(&ptr_port->lock);
        } /* end for( idx_port ) */
    } /* end for(;;) */

    return 0;
}

int main(int argc, char **argv)
{
    int cnt_args_parsed;
    uint32_t id_core;
    uint32_t cnt_ports;

    /* Init runtime environment */
    cnt_args_parsed = rte_eal_init(argc, argv);
    if (cnt_args_parsed < 0)
        rte_exit(EXIT_FAILURE, "rte_eal_init(): Failed");

    cnt_ports = rte_eth_dev_count_avail();
    printf("Number of NICs: %i\n", cnt_ports);
    if (cnt_ports == 0)
        rte_exit(EXIT_FAILURE, "No available NIC ports!\n");
    if (cnt_ports > MAX_PORTS) {
        printf("Info: Using only %i of %i ports\n",
            cnt_ports, MAX_PORTS
            );
        cnt_ports = MAX_PORTS;
    }

    setup_ports(&app_cfg, cnt_ports);

    app_cfg.exit_now = 0;
    app_cfg.cnt_ports = cnt_ports;

    if (rte_lcore_count() < 2)
        rte_exit(EXIT_FAILURE, "No available slave core!\n");
    /* Assume there is an available slave.. */
    id_core = rte_lcore_id();
    id_core = rte_get_next_lcore(id_core, 1, 1);
    rte_eal_remote_launch(slave_main, NULL, id_core);

    ethapp_main();

    app_cfg.exit_now = 1;
    RTE_LCORE_FOREACH_SLAVE(id_core) {
        if (rte_eal_wait_lcore(id_core) < 0)
            return -1;
    }

    return 0;
}