struct rte_eth_conf数据结构解析-DPDK中文网

rte_eth_conf 结构体是 DPDK 中的一个数据结构，用于配置以太网设备（Ethernet device）的属性。该结构体定义如下：

struct rte_eth_conf {
    uint32_t link_speed;     /**< ETH_LINK_SPEED_* */
    uint32_t link_duplex;    /**< ETH_LINK_[HALF/FULL]_DUPLEX */
    struct {
        uint32_t high_water; /**< Set RX buffer high threshold. */
        uint32_t low_water;  /**< Set RX buffer low threshold. */
        uint16_t size;       /**< RX ring size, power of 2 required. */
        uint8_t drop_en;     /**< Drop packets if no descriptors are available. */
    } rxmode;                /**< Configuration of the reception path. */
    struct {
        uint16_t nb_queues;   /**< Number of transmit queues. */
        uint16_t nb_desc;     /**< Number of transmit descriptors in each queue. */
        uint16_t deferred_start; /**< Defered start for TX queues. */
        uint16_t tx_free_thresh; /**< Start freeing TX buffers when there are less free descriptors than this value. */
        enum rte_eth_tx_mq_mode mq_mode;
                              /**< Select Tx multi-queue mode: none(0), RSS (1) or DCB(2). */
        uint8_t offloads;     /**< Device TX offloads configuration. */
    } txmode;                /**< Configuration of the transmission path. */
    struct {
        enum rte_eth_rx_mq_mode mq_mode; /**< Select Rx multi-queue mode: none(0), RSS (1), DCB(2) or VMDQ(3). */
        uint16_t max_rx_pkt_len; /**< Stop receiving after size of this packet is received. */
        uint16_t split_hdr_size; /**< Split header, e.g. for VLAN header. */
        uint16_t nb_queues;   /**< Number of receive queues. */
        uint8_t enable_lro;   /**< Enable LRO (Large Receive Offload). */
        uint8_t enable_scatter; /**< Enable scatter gather. */
        uint8_t rx_free_thresh; /**< Start freeing RX buffers when there are less free descriptors than this value. */
        uint8_t offloads;     /**< Device RX offloads configuration. */
    } rxmode;                /**< Configuration of the reception path. */
    struct {
        uint32_t burst_size;  /**< Maximum size of bursts. */
        uint32_t ring_size;   /**< Size of descriptor rings. */
        uint8_t retry_mode;   /**< Enable retry mode. */
        uint8_t intr_conf.rxq; /**< RX queue intr-conf. */
    } rx_adv_conf;           /**< Advanced configuration for the Rx side. */
    struct {
        uint32_t burst_size;  /**< Maximum size of bursts. */
        uint32_t ring_size;   /**< Size of descriptor rings. */
        uint16_t nb_tcs;      /**< Number of traffic classes in DCB. */
        struct rte_eth_dcb_tx_conf tx_conf[RTE_ETH_DCB_MAX_TRAFFIC_CLASS];
                              /**< Tx configuration for DCB. */
        struct rte_eth_dcb_rx_conf rx_conf[RTE_ETH_DCB_MAX_TRAFFIC_CLASS];
                              /**< Rx configuration for DCB. */
    } dcb;                   /**< DCB configuration. */
    struct rte_eth_vmdq_rx_conf vmdq_rx_conf;
                            /**< VMDQ configuration. */
    struct rte_eth_mac_filter *mac_filter; /**< MAC filtering configuration. */
    uint32_t rx_queue_flags;/**< Flags for configuring the behavior of the Rx queues. */
    uint32_t tx_queue_flags;/**< Flags for configuring the behavior of the Tx queues. */
    struct rte_eth_fdir_conf fdir_conf;
                            /**< Filter Control frame configuration. */
    struct rte_eth_intr_conf intr_conf;
                            /**< Device interrupt configuration. */
};

具体解析如下：