qos_meter/main.c

/*-
 *   BSD LICENSE
 *
 *   Copyright(c) 2010-2016 Intel Corporation. All rights reserved.
 *   All rights reserved.
 *
 *   Redistribution and use in source and binary forms, with or without
 *   modification, are permitted provided that the following conditions
 *   are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in
 *       the documentation and/or other materials provided with the
 *       distribution.
 *     * Neither the name of Intel Corporation nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <stdio.h>
#include <getopt.h>

#include <rte_common.h>
#include <rte_eal.h>
#include <rte_malloc.h>
#include <rte_mempool.h>
#include <rte_ethdev.h>
#include <rte_cycles.h>
#include <rte_mbuf.h>
#include <rte_meter.h>

/*
 * Traffic metering configuration
 *
 */
#define APP_MODE_FWD                    0
#define APP_MODE_SRTCM_COLOR_BLIND      1
#define APP_MODE_SRTCM_COLOR_AWARE      2
#define APP_MODE_TRTCM_COLOR_BLIND      3
#define APP_MODE_TRTCM_COLOR_AWARE      4

#define APP_MODE    APP_MODE_SRTCM_COLOR_BLIND


#include "main.h"


#define APP_PKT_FLOW_POS                33
#define APP_PKT_COLOR_POS               5


#if APP_PKT_FLOW_POS > 64 || APP_PKT_COLOR_POS > 64
#error Byte offset needs to be less than 64
#endif

/*
 * Buffer pool configuration
 *
 ***/
#define NB_MBUF             8192
#define MEMPOOL_CACHE_SIZE  256

static struct rte_mempool *pool = NULL;

/*
 * NIC configuration
 *
 ***/
static struct rte_eth_conf port_conf = {
    .rxmode = {
        .mq_mode    = ETH_MQ_RX_RSS,
        .max_rx_pkt_len = ETHER_MAX_LEN,
        .split_hdr_size = 0,
        .header_split   = 0,
        .hw_ip_checksum = 1,
        .hw_vlan_filter = 0,
        .jumbo_frame    = 0,
        .hw_strip_crc   = 1,
    },
    .rx_adv_conf = {
        .rss_conf = {
            .rss_key = NULL,
            .rss_hf = ETH_RSS_IP,
        },
    },
    .txmode = {
        .mq_mode = ETH_DCB_NONE,
    },
};

#define NIC_RX_QUEUE_DESC               128
#define NIC_TX_QUEUE_DESC               512

#define NIC_RX_QUEUE                    0
#define NIC_TX_QUEUE                    0

/*
 * Packet RX/TX
 *
 ***/
#define PKT_RX_BURST_MAX                32
#define PKT_TX_BURST_MAX                32
#define TIME_TX_DRAIN                   200000ULL

static uint8_t port_rx;
static uint8_t port_tx;
static struct rte_mbuf *pkts_rx[PKT_RX_BURST_MAX];
struct rte_eth_dev_tx_buffer *tx_buffer;

struct rte_meter_srtcm_params app_srtcm_params[] = {
    {.cir = 1000000 * 46,  .cbs = 2048, .ebs = 2048},
};

struct rte_meter_trtcm_params app_trtcm_params[] = {
    {.cir = 1000000 * 46,  .pir = 1500000 * 46,  .cbs = 2048, .pbs = 2048},
};

#define APP_FLOWS_MAX  256

FLOW_METER app_flows[APP_FLOWS_MAX];

static int
app_configure_flow_table(void)
{
    uint32_t i, j;
    int ret;

    for (i = 0, j = 0; i < APP_FLOWS_MAX;
            i ++, j = (j + 1) % RTE_DIM(PARAMS)) {
        ret = FUNC_CONFIG(&app_flows[i], &PARAMS[j]);
        if (ret)
            return ret;
    }

    return 0;
}

static inline void
app_set_pkt_color(uint8_t *pkt_data, enum policer_action color)
{
    pkt_data[APP_PKT_COLOR_POS] = (uint8_t)color;
}

static inline int
app_pkt_handle(struct rte_mbuf *pkt, uint64_t time)
{
    uint8_t input_color, output_color;
    uint8_t *pkt_data = rte_pktmbuf_mtod(pkt, uint8_t *);
    uint32_t pkt_len = rte_pktmbuf_pkt_len(pkt) - sizeof(struct ether_hdr);
    uint8_t flow_id = (uint8_t)(pkt_data[APP_PKT_FLOW_POS] & (APP_FLOWS_MAX - 1));
    input_color = pkt_data[APP_PKT_COLOR_POS];
    enum policer_action action;

    /* color input is not used for blind modes */
    output_color = (uint8_t) FUNC_METER(&app_flows[flow_id], time, pkt_len,
        (enum rte_meter_color) input_color);

    /* Apply policing and set the output color */
    action = policer_table[input_color][output_color];
    app_set_pkt_color(pkt_data, action);

    return action;
}


static __attribute__((noreturn)) int
main_loop(__attribute__((unused)) void *dummy)
{
    uint64_t current_time, last_time = rte_rdtsc();
    uint32_t lcore_id = rte_lcore_id();

    printf("Core %u: port RX = %d, port TX = %d\n", lcore_id, port_rx, port_tx);

    while (1) {
        uint64_t time_diff;
        int i, nb_rx;

        /* Mechanism to avoid stale packets in the output buffer */
        current_time = rte_rdtsc();
        time_diff = current_time - last_time;
        if (unlikely(time_diff > TIME_TX_DRAIN)) {
            /* Flush tx buffer */
            rte_eth_tx_buffer_flush(port_tx, NIC_TX_QUEUE, tx_buffer);
            last_time = current_time;
        }

        /* Read packet burst from NIC RX */
        nb_rx = rte_eth_rx_burst(port_rx, NIC_RX_QUEUE, pkts_rx, PKT_RX_BURST_MAX);

        /* Handle packets */
        for (i = 0; i < nb_rx; i ++) {
            struct rte_mbuf *pkt = pkts_rx[i];

            /* Handle current packet */
            if (app_pkt_handle(pkt, current_time) == DROP)
                rte_pktmbuf_free(pkt);
            else
                rte_eth_tx_buffer(port_tx, NIC_TX_QUEUE, tx_buffer, pkt);
        }
    }
}

static void
print_usage(const char *prgname)
{
    printf ("%s [EAL options] -- -p PORTMASK\n"
        "  -p PORTMASK: hexadecimal bitmask of ports to configure\n",
        prgname);
}

static int
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;
}

/* Parse the argument given in the command line of the application */
static int
parse_args(int argc, char **argv)
{
    int opt;
    char **argvopt;
    int option_index;
    char *prgname = argv[0];
    static struct option lgopts[] = {
        {NULL, 0, 0, 0}
    };
    uint64_t port_mask, i, mask;

    argvopt = argv;

    while ((opt = getopt_long(argc, argvopt, "p:", lgopts, &option_index)) != EOF) {
        switch (opt) {
        case 'p':
            port_mask = parse_portmask(optarg);
            if (port_mask == 0) {
                printf("invalid port mask (null port mask)\n");
                print_usage(prgname);
                return -1;
            }

            for (i = 0, mask = 1; i < 64; i ++, mask <<= 1){
                if (mask & port_mask){
                    port_rx = i;
                    port_mask &= ~ mask;
                    break;
                }
            }

            for (i = 0, mask = 1; i < 64; i ++, mask <<= 1){
                if (mask & port_mask){
                    port_tx = i;
                    port_mask &= ~ mask;
                    break;
                }
            }

            if (port_mask != 0) {
                printf("invalid port mask (more than 2 ports)\n");
                print_usage(prgname);
                return -1;
            }
            break;

        default:
            print_usage(prgname);
            return -1;
        }
    }

    if (optind <= 1) {
        print_usage(prgname);
        return -1;
    }

    argv[optind-1] = prgname;

    optind = 0; /* reset getopt lib */
    return 0;
}

int
main(int argc, char **argv)
{
    uint32_t lcore_id;
    int ret;

    /* EAL init */
    ret = rte_eal_init(argc, argv);
    if (ret < 0)
        rte_exit(EXIT_FAILURE, "Invalid EAL parameters\n");
    argc -= ret;
    argv += ret;
    if (rte_lcore_count() != 1) {
        rte_exit(EXIT_FAILURE, "This application does not accept more than one core. "
        "Please adjust the \"-c COREMASK\" parameter accordingly.\n");
    }

    /* Application non-EAL arguments parse */
    ret = parse_args(argc, argv);
    if (ret < 0)
        rte_exit(EXIT_FAILURE, "Invalid input arguments\n");

    /* Buffer pool init */
    pool = rte_pktmbuf_pool_create("pool", NB_MBUF, MEMPOOL_CACHE_SIZE,
        0, RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id());
    if (pool == NULL)
        rte_exit(EXIT_FAILURE, "Buffer pool creation error\n");

    /* NIC init */
    ret = rte_eth_dev_configure(port_rx, 1, 1, &port_conf);
    if (ret < 0)
        rte_exit(EXIT_FAILURE, "Port %d configuration error (%d)\n", port_rx, ret);

    ret = rte_eth_rx_queue_setup(port_rx, NIC_RX_QUEUE, NIC_RX_QUEUE_DESC,
                rte_eth_dev_socket_id(port_rx),
                NULL, pool);
    if (ret < 0)
        rte_exit(EXIT_FAILURE, "Port %d RX queue setup error (%d)\n", port_rx, ret);

    ret = rte_eth_tx_queue_setup(port_rx, NIC_TX_QUEUE, NIC_TX_QUEUE_DESC,
                rte_eth_dev_socket_id(port_rx),
                NULL);
    if (ret < 0)
    rte_exit(EXIT_FAILURE, "Port %d TX queue setup error (%d)\n", port_rx, ret);

    ret = rte_eth_dev_configure(port_tx, 1, 1, &port_conf);
    if (ret < 0)
        rte_exit(EXIT_FAILURE, "Port %d configuration error (%d)\n", port_tx, ret);

    ret = rte_eth_rx_queue_setup(port_tx, NIC_RX_QUEUE, NIC_RX_QUEUE_DESC,
                rte_eth_dev_socket_id(port_tx),
                NULL, pool);
    if (ret < 0)
        rte_exit(EXIT_FAILURE, "Port %d RX queue setup error (%d)\n", port_tx, ret);

    ret = rte_eth_tx_queue_setup(port_tx, NIC_TX_QUEUE, NIC_TX_QUEUE_DESC,
                rte_eth_dev_socket_id(port_tx),
                NULL);
    if (ret < 0)
        rte_exit(EXIT_FAILURE, "Port %d TX queue setup error (%d)\n", port_tx, ret);

    tx_buffer = rte_zmalloc_socket("tx_buffer",
            RTE_ETH_TX_BUFFER_SIZE(PKT_TX_BURST_MAX), 0,
            rte_eth_dev_socket_id(port_tx));
    if (tx_buffer == NULL)
        rte_exit(EXIT_FAILURE, "Port %d TX buffer allocation error\n",
                port_tx);

    rte_eth_tx_buffer_init(tx_buffer, PKT_TX_BURST_MAX);

    ret = rte_eth_dev_start(port_rx);
    if (ret < 0)
        rte_exit(EXIT_FAILURE, "Port %d start error (%d)\n", port_rx, ret);

    ret = rte_eth_dev_start(port_tx);
    if (ret < 0)
        rte_exit(EXIT_FAILURE, "Port %d start error (%d)\n", port_tx, ret);

    rte_eth_promiscuous_enable(port_rx);

    rte_eth_promiscuous_enable(port_tx);

    /* App configuration */
    ret = app_configure_flow_table();
    if (ret < 0)
        rte_exit(EXIT_FAILURE, "Invalid configure flow table\n");

    /* Launch per-lcore init on every lcore */
    rte_eal_mp_remote_launch(main_loop, NULL, CALL_MASTER);
    RTE_LCORE_FOREACH_SLAVE(lcore_id) {
        if (rte_eal_wait_lcore(lcore_id) < 0)
            return -1;
    }

    return 0;
}