examples/ip_pipeline/link.c

/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2010-2018 Intel Corporation
 */

#include <stdlib.h>
#include <string.h>

#include <rte_ethdev.h>
#include <rte_string_fns.h>

#include "link.h"
#include "mempool.h"

static struct link_list link_list;

int
link_init(void)
{
    TAILQ_INIT(&link_list);

    return 0;
}

struct link *
link_find(const char *name)
{
    struct link *link;

    if (name == NULL)
        return NULL;

    TAILQ_FOREACH(link, &link_list, node)
        if (strcmp(link->name, name) == 0)
            return link;

    return NULL;
}

struct link *
link_next(struct link *link)
{
    return (link == NULL) ? TAILQ_FIRST(&link_list) : TAILQ_NEXT(link, node);
}

static struct rte_eth_conf port_conf_default = {
    .link_speeds = 0,
    .rxmode = {
        .mq_mode = ETH_MQ_RX_NONE,
        .max_rx_pkt_len = 9000, /* Jumbo frame max packet len */
        .split_hdr_size = 0, /* Header split buffer size */
    },
    .rx_adv_conf = {
        .rss_conf = {
            .rss_key = NULL,
            .rss_key_len = 40,
            .rss_hf = 0,
        },
    },
    .txmode = {
        .mq_mode = ETH_MQ_TX_NONE,
    },
    .lpbk_mode = 0,
};

#define RETA_CONF_SIZE     (ETH_RSS_RETA_SIZE_512 / RTE_RETA_GROUP_SIZE)

static int
rss_setup(uint16_t port_id,
    uint16_t reta_size,
    struct link_params_rss *rss)
{
    struct rte_eth_rss_reta_entry64 reta_conf[RETA_CONF_SIZE];
    uint32_t i;
    int status;

    /* RETA setting */
    memset(reta_conf, 0, sizeof(reta_conf));

    for (i = 0; i < reta_size; i++)
        reta_conf[i / RTE_RETA_GROUP_SIZE].mask = UINT64_MAX;

    for (i = 0; i < reta_size; i++) {
        uint32_t reta_id = i / RTE_RETA_GROUP_SIZE;
        uint32_t reta_pos = i % RTE_RETA_GROUP_SIZE;
        uint32_t rss_qs_pos = i % rss->n_queues;

        reta_conf[reta_id].reta[reta_pos] =
            (uint16_t) rss->queue_id[rss_qs_pos];
    }

    /* RETA update */
    status = rte_eth_dev_rss_reta_update(port_id,
        reta_conf,
        reta_size);

    return status;
}

struct link *
link_create(const char *name, struct link_params *params)
{
    struct rte_eth_dev_info port_info;
    struct rte_eth_conf port_conf;
    struct link *link;
    struct link_params_rss *rss;
    struct mempool *mempool;
    uint32_t cpu_id, i;
    int status;
    uint16_t port_id;

    /* Check input params */
    if ((name == NULL) ||
        link_find(name) ||
        (params == NULL) ||
        (params->rx.n_queues == 0) ||
        (params->rx.queue_size == 0) ||
        (params->tx.n_queues == 0) ||
        (params->tx.queue_size == 0))
        return NULL;

    port_id = params->port_id;
    if (params->dev_name) {
        status = rte_eth_dev_get_port_by_name(params->dev_name,
            &port_id);

        if (status)
            return NULL;
    } else
        if (!rte_eth_dev_is_valid_port(port_id))
            return NULL;

    if (rte_eth_dev_info_get(port_id, &port_info) != 0)
        return NULL;

    mempool = mempool_find(params->rx.mempool_name);
    if (mempool == NULL)
        return NULL;

    rss = params->rx.rss;
    if (rss) {
        if ((port_info.reta_size == 0) ||
            (port_info.reta_size > ETH_RSS_RETA_SIZE_512))
            return NULL;

        if ((rss->n_queues == 0) ||
            (rss->n_queues >= LINK_RXQ_RSS_MAX))
            return NULL;

        for (i = 0; i < rss->n_queues; i++)
            if (rss->queue_id[i] >= port_info.max_rx_queues)
                return NULL;
    }

    /* Port */
    memcpy(&port_conf, &port_conf_default, sizeof(port_conf));
    if (rss) {
        port_conf.rxmode.mq_mode = ETH_MQ_RX_RSS;
        port_conf.rx_adv_conf.rss_conf.rss_hf =
            (ETH_RSS_IP | ETH_RSS_TCP | ETH_RSS_UDP) &
            port_info.flow_type_rss_offloads;
    }

    cpu_id = (uint32_t) rte_eth_dev_socket_id(port_id);
    if (cpu_id == (uint32_t) SOCKET_ID_ANY)
        cpu_id = 0;

    status = rte_eth_dev_configure(
        port_id,
        params->rx.n_queues,
        params->tx.n_queues,
        &port_conf);

    if (status < 0)
        return NULL;

    if (params->promiscuous) {
        status = rte_eth_promiscuous_enable(port_id);
        if (status != 0)
            return NULL;
    }

    /* Port RX */
    for (i = 0; i < params->rx.n_queues; i++) {
        status = rte_eth_rx_queue_setup(
            port_id,
            i,
            params->rx.queue_size,
            cpu_id,
            NULL,
            mempool->m);

        if (status < 0)
            return NULL;
    }

    /* Port TX */
    for (i = 0; i < params->tx.n_queues; i++) {
        status = rte_eth_tx_queue_setup(
            port_id,
            i,
            params->tx.queue_size,
            cpu_id,
            NULL);

        if (status < 0)
            return NULL;
    }

    /* Port start */
    status = rte_eth_dev_start(port_id);
    if (status < 0)
        return NULL;

    if (rss) {
        status = rss_setup(port_id, port_info.reta_size, rss);

        if (status) {
            rte_eth_dev_stop(port_id);
            return NULL;
        }
    }

    /* Port link up */
    status = rte_eth_dev_set_link_up(port_id);
    if ((status < 0) && (status != -ENOTSUP)) {
        rte_eth_dev_stop(port_id);
        return NULL;
    }

    /* Node allocation */
    link = calloc(1, sizeof(struct link));
    if (link == NULL) {
        rte_eth_dev_stop(port_id);
        return NULL;
    }

    /* Node fill in */
    strlcpy(link->name, name, sizeof(link->name));
    link->port_id = port_id;
    link->n_rxq = params->rx.n_queues;
    link->n_txq = params->tx.n_queues;

    /* Node add to list */
    TAILQ_INSERT_TAIL(&link_list, link, node);

    return link;
}

int
link_is_up(const char *name)
{
    struct rte_eth_link link_params;
    struct link *link;

    /* Check input params */
    if (name == NULL)
        return 0;

    link = link_find(name);
    if (link == NULL)
        return 0;

    /* Resource */
    if (rte_eth_link_get(link->port_id, &link_params) < 0)
        return 0;

    return (link_params.link_status == ETH_LINK_DOWN) ? 0 : 1;
}