examples/l2fwd-event/l2fwd_common.c

/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(C) 2019 Marvell International Ltd.
 */
 
#include "l2fwd_common.h"
 
int
l2fwd_event_init_ports(struct l2fwd_resources *rsrc)
{
    uint16_t nb_rxd = RX_DESC_DEFAULT;
    uint16_t nb_txd = TX_DESC_DEFAULT;
    struct rte_eth_conf port_conf = {
        .txmode = {
            .mq_mode = RTE_ETH_MQ_TX_NONE,
        },
    };
    uint16_t nb_ports_available = 0;
    uint16_t port_id;
    int ret;
 
    if (rsrc->event_mode) {
        port_conf.rxmode.mq_mode = RTE_ETH_MQ_RX_RSS;
        port_conf.rx_adv_conf.rss_conf.rss_key = NULL;
        port_conf.rx_adv_conf.rss_conf.rss_hf = RTE_ETH_RSS_IP;
    }
 
    /* Initialise each port */
    RTE_ETH_FOREACH_DEV(port_id) {
        struct rte_eth_conf local_port_conf = port_conf;
        struct rte_eth_dev_info dev_info;
        struct rte_eth_rxconf rxq_conf;
        struct rte_eth_txconf txq_conf;
 
        /* skip ports that are not enabled */
        if ((rsrc->enabled_port_mask & (1 << port_id)) == 0) {
            printf("Skipping disabled port %u\n", port_id);
            continue;
        }
        nb_ports_available++;
 
        /* init port */
        printf("Initializing port %u... ", port_id);
        fflush(stdout);
 
        ret = rte_eth_dev_info_get(port_id, &dev_info);
        if (ret != 0)
            rte_panic("Error during getting device (port %u) info: %s\n",
                  port_id, strerror(-ret));
        local_port_conf.rx_adv_conf.rss_conf.rss_hf &=
            dev_info.flow_type_rss_offloads;
        if (local_port_conf.rx_adv_conf.rss_conf.rss_hf !=
                port_conf.rx_adv_conf.rss_conf.rss_hf) {
            printf("Port %u modified RSS hash function based on hardware support,"
                   "requested:%#"PRIx64" configured:%#"PRIx64"",
                port_id,
                port_conf.rx_adv_conf.rss_conf.rss_hf,
                local_port_conf.rx_adv_conf.rss_conf.rss_hf);
        }
 
        if (dev_info.tx_offload_capa & RTE_ETH_TX_OFFLOAD_MBUF_FAST_FREE)
            local_port_conf.txmode.offloads |=
                RTE_ETH_TX_OFFLOAD_MBUF_FAST_FREE;
        /* Configure RX and TX queue. 8< */
        ret = rte_eth_dev_configure(port_id, 1, 1, &local_port_conf);
        if (ret < 0)
            rte_panic("Cannot configure device: err=%d, port=%u\n",
                  ret, port_id);
        /* >8 End of configuration RX and TX queue. */
 
        ret = rte_eth_dev_adjust_nb_rx_tx_desc(port_id, &nb_rxd,
                               &nb_txd);
        if (ret < 0)
            rte_panic("Cannot adjust number of descriptors: err=%d, port=%u\n",
                  ret, port_id);
 
        rte_eth_macaddr_get(port_id, &rsrc->eth_addr[port_id]);
 
        /* init one RX queue */
        fflush(stdout);
        rxq_conf = dev_info.default_rxconf;
        rxq_conf.offloads = local_port_conf.rxmode.offloads;
        /* Using lcore to poll one or several ports. 8< */
        ret = rte_eth_rx_queue_setup(port_id, 0, nb_rxd,
                         rte_eth_dev_socket_id(port_id),
                         &rxq_conf,
                         rsrc->pktmbuf_pool);
        if (ret < 0)
            rte_panic("rte_eth_rx_queue_setup:err=%d, port=%u\n",
                  ret, port_id);
 
        /* >8 End of using lcore to poll one or several ports. */
 
        /* Init one TX queue on each port. 8< */
        fflush(stdout);
        txq_conf = dev_info.default_txconf;
        txq_conf.offloads = local_port_conf.txmode.offloads;
        ret = rte_eth_tx_queue_setup(port_id, 0, nb_txd,
                rte_eth_dev_socket_id(port_id),
                &txq_conf);
        if (ret < 0)
            rte_panic("rte_eth_tx_queue_setup:err=%d, port=%u\n",
                  ret, port_id);
        /* >8 End of init one TX queue on each port. */
 
        rte_eth_promiscuous_enable(port_id);
 
        printf("Port %u,MAC address: " RTE_ETHER_ADDR_PRT_FMT "\n\n",
            port_id,
            RTE_ETHER_ADDR_BYTES(&rsrc->eth_addr[port_id]));
    }
 
    return nb_ports_available;
}
 
static void
l2fwd_event_vector_array_free(struct rte_event events[], uint16_t num)
{
    uint16_t i;
 
    for (i = 0; i < num; i++) {
        rte_pktmbuf_free_bulk(
            &events[i].vec->mbufs[events[i].vec->elem_offset],
            events[i].vec->nb_elem);
        rte_mempool_put(rte_mempool_from_obj(events[i].vec),
                events[i].vec);
    }
}
 
static void
l2fwd_event_port_flush(uint8_t event_d_id __rte_unused, struct rte_event ev,
               void *args __rte_unused)
{
    if (ev.event_type & RTE_EVENT_TYPE_VECTOR)
        l2fwd_event_vector_array_free(&ev, 1);
    else
        rte_pktmbuf_free(ev.mbuf);
}
 
void
l2fwd_event_worker_cleanup(uint8_t event_d_id, uint8_t port_id,
               struct rte_event events[], uint16_t nb_enq,
               uint16_t nb_deq, uint8_t is_vector)
{
    int i;
 
    if (nb_deq) {
        if (is_vector)
            l2fwd_event_vector_array_free(events + nb_enq,
                              nb_deq - nb_enq);
        else
            for (i = nb_enq; i < nb_deq; i++)
                rte_pktmbuf_free(events[i].mbuf);
 
        for (i = 0; i < nb_deq; i++)
            events[i].op = RTE_EVENT_OP_RELEASE;
        rte_event_enqueue_burst(event_d_id, port_id, events, nb_deq);
    }
 
    rte_event_port_quiesce(event_d_id, port_id, l2fwd_event_port_flush,
                   NULL);
}