Symmetric RSS in DPDK for i40e

struct rte_eth_conf port_conf = {
  .rxmode = {
    .mq_mode = ETH_MQ_RX_RSS,
  },
  .rx_adv_conf = {
    .rss_conf = {
        .rss_hf = ETH_RSS_IP |
              ETH_RSS_TCP |
              ETH_RSS_UDP |
              ETH_RSS_SCTP,
    }
   },
};

rte_eth_dev_configure(port_id, rx_queue_num, tx_queue_num, &port_conf);

int sym_hash_enable(int port_id, uint32_t ftype, enum rte_eth_hash_function function)
{
    struct rte_eth_hash_filter_info info;
    int ret = 0;
    uint32_t idx = 0;
    uint32_t offset = 0;

    memset(&info, 0, sizeof(info));

    ret = rte_eth_dev_filter_supported(port_id, RTE_ETH_FILTER_HASH);
    if (ret < 0) {
        DPDK_ERROR("RTE_ETH_FILTER_HASH not supported on port: %d",
                         port_id);
        return ret;
    }

    info.info_type = RTE_ETH_HASH_FILTER_GLOBAL_CONFIG;
    info.info.global_conf.hash_func = function;

    idx = ftype / UINT64_BIT;
    offset = ftype % UINT64_BIT;
    info.info.global_conf.valid_bit_mask[idx] |= (1ULL << offset);
    info.info.global_conf.sym_hash_enable_mask[idx] |=
                        (1ULL << offset);

    ret = rte_eth_dev_filter_ctrl(port_id, RTE_ETH_FILTER_HASH,
                                  RTE_ETH_FILTER_SET, &info);
    if (ret < 0)
    {
        DPDK_ERROR("Cannot set global hash configurations"
                        "on port %u", port_id);
        return ret;
    }

    return 0;
}

int sym_hash_set(int port_id, int enable)
{
    int ret = 0;
    struct rte_eth_hash_filter_info info;

    memset(&info, 0, sizeof(info));

    ret = rte_eth_dev_filter_supported(port_id, RTE_ETH_FILTER_HASH);
    if (ret < 0) {
        DPDK_ERROR("RTE_ETH_FILTER_HASH not supported on port: %d",
                         port_id);
        return ret;
    }

    info.info_type = RTE_ETH_HASH_FILTER_SYM_HASH_ENA_PER_PORT;
    info.info.enable = enable;
    ret = rte_eth_dev_filter_ctrl(port_id, RTE_ETH_FILTER_HASH,
                        RTE_ETH_FILTER_SET, &info);

    if (ret < 0)
    {
        DPDK_ERROR("Cannot set symmetric hash enable per port "
                        "on port %u", port_id);
        return ret;
    }

    return 0;
}

sym_hash_enable(port_id, RTE_ETH_FLOW_NONFRAG_IPV4_TCP, RTE_ETH_HASH_FUNCTION_TOEPLITZ);
sym_hash_enable(port_id, RTE_ETH_FLOW_NONFRAG_IPV4_UDP, RTE_ETH_HASH_FUNCTION_TOEPLITZ);
sym_hash_enable(port_id, RTE_ETH_FLOW_FRAG_IPV4, RTE_ETH_HASH_FUNCTION_TOEPLITZ);
sym_hash_enable(port_id, RTE_ETH_FLOW_NONFRAG_IPV4_SCTP, RTE_ETH_HASH_FUNCTION_TOEPLITZ);
sym_hash_enable(port_id, RTE_ETH_FLOW_NONFRAG_IPV4_OTHER, RTE_ETH_HASH_FUNCTION_TOEPLITZ);

sym_hash_set(port_id, 1);

hi,
does this work ok?with witch dpdk version

He used DPDK 18.05.1

hi, what should we do in 21.11?