ethdev: support queue-based priority flow control

[dpdk.git] / lib / ethdev / ethdev_driver.h

/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2017 Intel Corporation
 */

#ifndef _RTE_ETHDEV_DRIVER_H_
#define _RTE_ETHDEV_DRIVER_H_

/**
 * @file
 *
 * RTE Ethernet Device PMD API
 *
 * These APIs for the use from Ethernet drivers, user applications shouldn't
 * use them.
 *
 */

#include <rte_ethdev.h>

/**
 * @internal
 * Structure used to hold information about the callbacks to be called for a
 * queue on Rx and Tx.
 */
struct rte_eth_rxtx_callback {
        struct rte_eth_rxtx_callback *next;
        union{
                rte_rx_callback_fn rx;
                rte_tx_callback_fn tx;
        } fn;
        void *param;
};

/**
 * @internal
 * The generic data structure associated with each Ethernet device.
 *
 * Pointers to burst-oriented packet receive and transmit functions are
 * located at the beginning of the structure, along with the pointer to
 * where all the data elements for the particular device are stored in shared
 * memory. This split allows the function pointer and driver data to be per-
 * process, while the actual configuration data for the device is shared.
 */
struct rte_eth_dev {
        eth_rx_burst_t rx_pkt_burst; /**< Pointer to PMD receive function */
        eth_tx_burst_t tx_pkt_burst; /**< Pointer to PMD transmit function */

        /** Pointer to PMD transmit prepare function */
        eth_tx_prep_t tx_pkt_prepare;
        /** Get the number of used Rx descriptors */
        eth_rx_queue_count_t rx_queue_count;
        /** Check the status of a Rx descriptor */
        eth_rx_descriptor_status_t rx_descriptor_status;
        /** Check the status of a Tx descriptor */
        eth_tx_descriptor_status_t tx_descriptor_status;

        /**
         * Device data that is shared between primary and secondary processes
         */
        struct rte_eth_dev_data *data;
        void *process_private; /**< Pointer to per-process device data */
        const struct eth_dev_ops *dev_ops; /**< Functions exported by PMD */
        struct rte_device *device; /**< Backing device */
        struct rte_intr_handle *intr_handle; /**< Device interrupt handle */

        /** User application callbacks for NIC interrupts */
        struct rte_eth_dev_cb_list link_intr_cbs;
        /**
         * User-supplied functions called from rx_burst to post-process
         * received packets before passing them to the user
         */
        struct rte_eth_rxtx_callback *post_rx_burst_cbs[RTE_MAX_QUEUES_PER_PORT];
        /**
         * User-supplied functions called from tx_burst to pre-process
         * received packets before passing them to the driver for transmission
         */
        struct rte_eth_rxtx_callback *pre_tx_burst_cbs[RTE_MAX_QUEUES_PER_PORT];

        enum rte_eth_dev_state state; /**< Flag indicating the port state */
        void *security_ctx; /**< Context for security ops */
} __rte_cache_aligned;

struct rte_eth_dev_sriov;
struct rte_eth_dev_owner;

/**
 * @internal
 * The data part, with no function pointers, associated with each Ethernet
 * device. This structure is safe to place in shared memory to be common
 * among different processes in a multi-process configuration.
 */
struct rte_eth_dev_data {
        char name[RTE_ETH_NAME_MAX_LEN]; /**< Unique identifier name */

        void **rx_queues; /**< Array of pointers to Rx queues */
        void **tx_queues; /**< Array of pointers to Tx queues */
        uint16_t nb_rx_queues; /**< Number of Rx queues */
        uint16_t nb_tx_queues; /**< Number of Tx queues */

        struct rte_eth_dev_sriov sriov;    /**< SRIOV data */

        /** PMD-specific private data. @see rte_eth_dev_release_port() */
        void *dev_private;

        struct rte_eth_link dev_link;   /**< Link-level information & status */
        struct rte_eth_conf dev_conf;   /**< Configuration applied to device */
        uint16_t mtu;                   /**< Maximum Transmission Unit */

        /** Common Rx buffer size handled by all queues */
        uint32_t min_rx_buf_size;

        uint64_t rx_mbuf_alloc_failed; /**< Rx ring mbuf allocation failures */

        /** Device Ethernet link address. @see rte_eth_dev_release_port() */
        struct rte_ether_addr *mac_addrs;
        /** Bitmap associating MAC addresses to pools */
        uint64_t mac_pool_sel[RTE_ETH_NUM_RECEIVE_MAC_ADDR];
        /**
         * Device Ethernet MAC addresses of hash filtering.
         * @see rte_eth_dev_release_port()
         */
        struct rte_ether_addr *hash_mac_addrs;

        uint16_t port_id;           /**< Device [external] port identifier */

        __extension__
        uint8_t /** Rx promiscuous mode ON(1) / OFF(0) */
                promiscuous   : 1,
                /** Rx of scattered packets is ON(1) / OFF(0) */
                scattered_rx : 1,
                /** Rx all multicast mode ON(1) / OFF(0) */
                all_multicast : 1,
                /** Device state: STARTED(1) / STOPPED(0) */
                dev_started : 1,
                /** Rx LRO is ON(1) / OFF(0) */
                lro         : 1,
                /**
                 * Indicates whether the device is configured:
                 * CONFIGURED(1) / NOT CONFIGURED(0)
                 */
                dev_configured : 1;

        /** Queues state: HAIRPIN(2) / STARTED(1) / STOPPED(0) */
        uint8_t rx_queue_state[RTE_MAX_QUEUES_PER_PORT];
        /** Queues state: HAIRPIN(2) / STARTED(1) / STOPPED(0) */
        uint8_t tx_queue_state[RTE_MAX_QUEUES_PER_PORT];

        uint32_t dev_flags;             /**< Capabilities */
        int numa_node;                  /**< NUMA node connection */

        /** VLAN filter configuration */
        struct rte_vlan_filter_conf vlan_filter_conf;

        struct rte_eth_dev_owner owner; /**< The port owner */

        /**
         * Switch-specific identifier.
         * Valid if RTE_ETH_DEV_REPRESENTOR in dev_flags.
         */
        uint16_t representor_id;
        /**
         * Port ID of the backing device.
         * This device will be used to query representor info and calculate
         * representor IDs. Valid if RTE_ETH_DEV_REPRESENTOR in dev_flags.
         */
        uint16_t backer_port_id;

        pthread_mutex_t flow_ops_mutex; /**< rte_flow ops mutex */
} __rte_cache_aligned;

/**
 * @internal
 * The pool of *rte_eth_dev* structures. The size of the pool
 * is configured at compile-time in the <rte_ethdev.c> file.
 */
extern struct rte_eth_dev rte_eth_devices[];

/** @internal Declaration of the hairpin peer queue information structure. */
struct rte_hairpin_peer_info;

/*
 * Definitions of all functions exported by an Ethernet driver through the
 * generic structure of type *eth_dev_ops* supplied in the *rte_eth_dev*
 * structure associated with an Ethernet device.
 */

/** @internal Ethernet device configuration. */
typedef int  (*eth_dev_configure_t)(struct rte_eth_dev *dev);

/** @internal Function used to start a configured Ethernet device. */
typedef int  (*eth_dev_start_t)(struct rte_eth_dev *dev);

/** @internal Function used to stop a configured Ethernet device. */
typedef int (*eth_dev_stop_t)(struct rte_eth_dev *dev);

/** @internal Function used to link up a configured Ethernet device. */
typedef int  (*eth_dev_set_link_up_t)(struct rte_eth_dev *dev);

/** @internal Function used to link down a configured Ethernet device. */
typedef int  (*eth_dev_set_link_down_t)(struct rte_eth_dev *dev);

/** @internal Function used to close a configured Ethernet device. */
typedef int (*eth_dev_close_t)(struct rte_eth_dev *dev);

/** @internal Function used to reset a configured Ethernet device. */
typedef int (*eth_dev_reset_t)(struct rte_eth_dev *dev);

/** @internal Function used to detect an Ethernet device removal. */
typedef int (*eth_is_removed_t)(struct rte_eth_dev *dev);

/**
 * @internal
 * Function used to enable the Rx promiscuous mode of an Ethernet device.
 *
 * @param dev
 *   ethdev handle of port.
 *
 * @return
 *   Negative errno value on error, 0 on success.
 *
 * @retval 0
 *   Success, promiscuous mode is enabled.
 * @retval -ENOTSUP
 *   Promiscuous mode is not supported.
 * @retval -ENODEV
 *   Device is gone.
 * @retval -E_RTE_SECONDARY
 *   Function was called from a secondary process instance and not supported.
 * @retval -ETIMEDOUT
 *   Attempt to enable promiscuous mode failed because of timeout.
 * @retval -EAGAIN
 *   Failed to enable promiscuous mode.
 */
typedef int (*eth_promiscuous_enable_t)(struct rte_eth_dev *dev);

/**
 * @internal
 * Function used to disable the Rx promiscuous mode of an Ethernet device.
 *
 * @param dev
 *   ethdev handle of port.
 *
 * @return
 *   Negative errno value on error, 0 on success.
 *
 * @retval 0
 *   Success, promiscuous mode is disabled.
 * @retval -ENOTSUP
 *   Promiscuous mode disabling is not supported.
 * @retval -ENODEV
 *   Device is gone.
 * @retval -E_RTE_SECONDARY
 *   Function was called from a secondary process instance and not supported.
 * @retval -ETIMEDOUT
 *   Attempt to disable promiscuous mode failed because of timeout.
 * @retval -EAGAIN
 *   Failed to disable promiscuous mode.
 */
typedef int (*eth_promiscuous_disable_t)(struct rte_eth_dev *dev);

/**
 * @internal
 * Enable the receipt of all multicast packets by an Ethernet device.
 *
 * @param dev
 *   ethdev handle of port.
 *
 * @return
 *   Negative errno value on error, 0 on success.
 *
 * @retval 0
 *   Success, all-multicast mode is enabled.
 * @retval -ENOTSUP
 *   All-multicast mode is not supported.
 * @retval -ENODEV
 *   Device is gone.
 * @retval -E_RTE_SECONDARY
 *   Function was called from a secondary process instance and not supported.
 * @retval -ETIMEDOUT
 *   Attempt to enable all-multicast mode failed because of timeout.
 * @retval -EAGAIN
 *   Failed to enable all-multicast mode.
 */
typedef int (*eth_allmulticast_enable_t)(struct rte_eth_dev *dev);

/**
 * @internal
 * Disable the receipt of all multicast packets by an Ethernet device.
 *
 * @param dev
 *   ethdev handle of port.
 *
 * @return
 *   Negative errno value on error, 0 on success.
 *
 * @retval 0
 *   Success, all-multicast mode is disabled.
 * @retval -ENOTSUP
 *   All-multicast mode disabling is not supported.
 * @retval -ENODEV
 *   Device is gone.
 * @retval -E_RTE_SECONDARY
 *   Function was called from a secondary process instance and not supported.
 * @retval -ETIMEDOUT
 *   Attempt to disable all-multicast mode failed because of timeout.
 * @retval -EAGAIN
 *   Failed to disable all-multicast mode.
 */
typedef int (*eth_allmulticast_disable_t)(struct rte_eth_dev *dev);

/**
 * @internal
 * Get link speed, duplex mode and state (up/down) of an Ethernet device.
 */
typedef int (*eth_link_update_t)(struct rte_eth_dev *dev,
                                int wait_to_complete);

/** @internal Get global I/O statistics of an Ethernet device. */
typedef int (*eth_stats_get_t)(struct rte_eth_dev *dev,
                                struct rte_eth_stats *igb_stats);

/**
 * @internal
 * Reset global I/O statistics of an Ethernet device to 0.
 *
 * @param dev
 *   ethdev handle of port.
 *
 * @return
 *   Negative errno value on error, 0 on success.
 *
 * @retval 0
 *   Success, statistics has been reset.
 * @retval -ENOTSUP
 *   Resetting statistics is not supported.
 * @retval -EINVAL
 *   Resetting statistics is not valid.
 * @retval -ENOMEM
 *   Not enough memory to get the stats.
 */
typedef int (*eth_stats_reset_t)(struct rte_eth_dev *dev);

/** @internal Get extended stats of an Ethernet device. */
typedef int (*eth_xstats_get_t)(struct rte_eth_dev *dev,
        struct rte_eth_xstat *stats, unsigned int n);

/**
 * @internal
 * Get extended stats of an Ethernet device.
 *
 * @param dev
 *   ethdev handle of port.
 * @param ids
 *   IDs array to retrieve specific statistics. Must not be NULL.
 * @param values
 *   A pointer to a table to be filled with device statistics values.
 *   Must not be NULL.
 * @param n
 *   Element count in @p ids and @p values.
 *
 * @return
 *   - A number of filled in stats.
 *   - A negative value on error.
 */
typedef int (*eth_xstats_get_by_id_t)(struct rte_eth_dev *dev,
                                      const uint64_t *ids,
                                      uint64_t *values,
                                      unsigned int n);

/**
 * @internal
 * Reset extended stats of an Ethernet device.
 *
 * @param dev
 *   ethdev handle of port.
 *
 * @return
 *   Negative errno value on error, 0 on success.
 *
 * @retval 0
 *   Success, statistics has been reset.
 * @retval -ENOTSUP
 *   Resetting statistics is not supported.
 * @retval -EINVAL
 *   Resetting statistics is not valid.
 * @retval -ENOMEM
 *   Not enough memory to get the stats.
 */
typedef int (*eth_xstats_reset_t)(struct rte_eth_dev *dev);

/** @internal Get names of extended stats of an Ethernet device. */
typedef int (*eth_xstats_get_names_t)(struct rte_eth_dev *dev,
        struct rte_eth_xstat_name *xstats_names, unsigned int size);

/**
 * @internal
 * Get names of extended stats of an Ethernet device.
 *
 * @param dev
 *   ethdev handle of port.
 * @param ids
 *   IDs array to retrieve specific statistics. Must not be NULL.
 * @param xstats_names
 *   An rte_eth_xstat_name array of at least @p size elements to be filled.
 *   Must not be NULL.
 * @param size
 *   Element count in @p ids and @p xstats_names.
 *
 * @return
 *   - A number of filled in stats.
 *   - A negative value on error.
 */
typedef int (*eth_xstats_get_names_by_id_t)(struct rte_eth_dev *dev,
        const uint64_t *ids, struct rte_eth_xstat_name *xstats_names,
        unsigned int size);

/**
 * @internal
 * Set a queue statistics mapping for a Tx/Rx queue of an Ethernet device.
 */
typedef int (*eth_queue_stats_mapping_set_t)(struct rte_eth_dev *dev,
                                             uint16_t queue_id,
                                             uint8_t stat_idx,
                                             uint8_t is_rx);

/** @internal Get specific information of an Ethernet device. */
typedef int (*eth_dev_infos_get_t)(struct rte_eth_dev *dev,
                                   struct rte_eth_dev_info *dev_info);

/** @internal Get supported ptypes of an Ethernet device. */
typedef const uint32_t *(*eth_dev_supported_ptypes_get_t)(struct rte_eth_dev *dev);

/**
 * @internal
 * Inform Ethernet device about reduced range of packet types to handle.
 *
 * @param dev
 *   The Ethernet device identifier.
 * @param ptype_mask
 *   The ptype family that application is interested in should be bitwise OR of
 *   RTE_PTYPE_*_MASK or 0.
 * @return
 *   - (0) if Success.
 */
typedef int (*eth_dev_ptypes_set_t)(struct rte_eth_dev *dev,
                                     uint32_t ptype_mask);

/** @internal Start Rx and Tx of a queue of an Ethernet device. */
typedef int (*eth_queue_start_t)(struct rte_eth_dev *dev,
                                    uint16_t queue_id);

/** @internal Stop Rx and Tx of a queue of an Ethernet device. */
typedef int (*eth_queue_stop_t)(struct rte_eth_dev *dev,
                                    uint16_t queue_id);

/** @internal Set up a receive queue of an Ethernet device. */
typedef int (*eth_rx_queue_setup_t)(struct rte_eth_dev *dev,
                                    uint16_t rx_queue_id,
                                    uint16_t nb_rx_desc,
                                    unsigned int socket_id,
                                    const struct rte_eth_rxconf *rx_conf,
                                    struct rte_mempool *mb_pool);

/** @internal Setup a transmit queue of an Ethernet device. */
typedef int (*eth_tx_queue_setup_t)(struct rte_eth_dev *dev,
                                    uint16_t tx_queue_id,
                                    uint16_t nb_tx_desc,
                                    unsigned int socket_id,
                                    const struct rte_eth_txconf *tx_conf);

/** @internal Enable interrupt of a receive queue of an Ethernet device. */
typedef int (*eth_rx_enable_intr_t)(struct rte_eth_dev *dev,
                                    uint16_t rx_queue_id);

/** @internal Disable interrupt of a receive queue of an Ethernet device. */
typedef int (*eth_rx_disable_intr_t)(struct rte_eth_dev *dev,
                                    uint16_t rx_queue_id);

/** @internal Release memory resources allocated by given Rx/Tx queue. */
typedef void (*eth_queue_release_t)(struct rte_eth_dev *dev,
                                    uint16_t queue_id);

/** @internal Get firmware information of an Ethernet device. */
typedef int (*eth_fw_version_get_t)(struct rte_eth_dev *dev,
                                     char *fw_version, size_t fw_size);

/** @internal Force mbufs to be from Tx ring. */
typedef int (*eth_tx_done_cleanup_t)(void *txq, uint32_t free_cnt);

typedef void (*eth_rxq_info_get_t)(struct rte_eth_dev *dev,
        uint16_t rx_queue_id, struct rte_eth_rxq_info *qinfo);

typedef void (*eth_txq_info_get_t)(struct rte_eth_dev *dev,
        uint16_t tx_queue_id, struct rte_eth_txq_info *qinfo);

typedef int (*eth_burst_mode_get_t)(struct rte_eth_dev *dev,
        uint16_t queue_id, struct rte_eth_burst_mode *mode);

/** @internal Set MTU. */
typedef int (*mtu_set_t)(struct rte_eth_dev *dev, uint16_t mtu);

/** @internal Filtering of a VLAN Tag Identifier by an Ethernet device. */
typedef int (*vlan_filter_set_t)(struct rte_eth_dev *dev,
                                  uint16_t vlan_id,
                                  int on);

/** @internal Set the outer/inner VLAN-TPID by an Ethernet device. */
typedef int (*vlan_tpid_set_t)(struct rte_eth_dev *dev,
                               enum rte_vlan_type type, uint16_t tpid);

/** @internal Set VLAN offload function by an Ethernet device. */
typedef int (*vlan_offload_set_t)(struct rte_eth_dev *dev, int mask);

/** @internal Set port based Tx VLAN insertion by an Ethernet device. */
typedef int (*vlan_pvid_set_t)(struct rte_eth_dev *dev,
                               uint16_t vlan_id,
                               int on);

/** @internal VLAN stripping enable/disable by an queue of Ethernet device. */
typedef void (*vlan_strip_queue_set_t)(struct rte_eth_dev *dev,
                                  uint16_t rx_queue_id,
                                  int on);

/** @internal Get current flow control parameter on an Ethernet device. */
typedef int (*flow_ctrl_get_t)(struct rte_eth_dev *dev,
                               struct rte_eth_fc_conf *fc_conf);

/** @internal Setup flow control parameter on an Ethernet device. */
typedef int (*flow_ctrl_set_t)(struct rte_eth_dev *dev,
                               struct rte_eth_fc_conf *fc_conf);

/** @internal Setup priority flow control parameter on an Ethernet device. */
typedef int (*priority_flow_ctrl_set_t)(struct rte_eth_dev *dev,
                                struct rte_eth_pfc_conf *pfc_conf);

/** @internal Get info for queue based PFC on an Ethernet device. */
typedef int (*priority_flow_ctrl_queue_info_get_t)(struct rte_eth_dev *dev,
                        struct rte_eth_pfc_queue_info *pfc_queue_info);
/** @internal Configure queue based PFC parameter on an Ethernet device. */
typedef int (*priority_flow_ctrl_queue_config_t)(struct rte_eth_dev *dev,
                        struct rte_eth_pfc_queue_conf *pfc_queue_conf);

/** @internal Update RSS redirection table on an Ethernet device. */
typedef int (*reta_update_t)(struct rte_eth_dev *dev,
                             struct rte_eth_rss_reta_entry64 *reta_conf,
                             uint16_t reta_size);

/** @internal Query RSS redirection table on an Ethernet device. */
typedef int (*reta_query_t)(struct rte_eth_dev *dev,
                            struct rte_eth_rss_reta_entry64 *reta_conf,
                            uint16_t reta_size);

/** @internal Update RSS hash configuration of an Ethernet device. */
typedef int (*rss_hash_update_t)(struct rte_eth_dev *dev,
                                 struct rte_eth_rss_conf *rss_conf);

/** @internal Get current RSS hash configuration of an Ethernet device. */
typedef int (*rss_hash_conf_get_t)(struct rte_eth_dev *dev,
                                   struct rte_eth_rss_conf *rss_conf);

/** @internal Turn on SW controllable LED on an Ethernet device. */
typedef int (*eth_dev_led_on_t)(struct rte_eth_dev *dev);

/** @internal Turn off SW controllable LED on an Ethernet device. */
typedef int (*eth_dev_led_off_t)(struct rte_eth_dev *dev);

/** @internal Remove MAC address from receive address register. */
typedef void (*eth_mac_addr_remove_t)(struct rte_eth_dev *dev, uint32_t index);

/** @internal Set a MAC address into Receive Address Register. */
typedef int (*eth_mac_addr_add_t)(struct rte_eth_dev *dev,
                                  struct rte_ether_addr *mac_addr,
                                  uint32_t index,
                                  uint32_t vmdq);

/** @internal Set a MAC address into Receive Address Register. */
typedef int (*eth_mac_addr_set_t)(struct rte_eth_dev *dev,
                                  struct rte_ether_addr *mac_addr);

/** @internal Set a Unicast Hash bitmap. */
typedef int (*eth_uc_hash_table_set_t)(struct rte_eth_dev *dev,
                                  struct rte_ether_addr *mac_addr,
                                  uint8_t on);

/** @internal Set all Unicast Hash bitmap. */
typedef int (*eth_uc_all_hash_table_set_t)(struct rte_eth_dev *dev,
                                  uint8_t on);

/** @internal Set queue Tx rate. */
typedef int (*eth_set_queue_rate_limit_t)(struct rte_eth_dev *dev,
                                uint16_t queue_idx,
                                uint16_t tx_rate);

/** @internal Add tunneling UDP port. */
typedef int (*eth_udp_tunnel_port_add_t)(struct rte_eth_dev *dev,
                                         struct rte_eth_udp_tunnel *tunnel_udp);

/** @internal Delete tunneling UDP port. */
typedef int (*eth_udp_tunnel_port_del_t)(struct rte_eth_dev *dev,
                                         struct rte_eth_udp_tunnel *tunnel_udp);

/** @internal set the list of multicast addresses on an Ethernet device. */
typedef int (*eth_set_mc_addr_list_t)(struct rte_eth_dev *dev,
                                      struct rte_ether_addr *mc_addr_set,
                                      uint32_t nb_mc_addr);

/** @internal Function used to enable IEEE1588/802.1AS timestamping. */
typedef int (*eth_timesync_enable_t)(struct rte_eth_dev *dev);

/** @internal Function used to disable IEEE1588/802.1AS timestamping. */
typedef int (*eth_timesync_disable_t)(struct rte_eth_dev *dev);

/** @internal Function used to read an Rx IEEE1588/802.1AS timestamp. */
typedef int (*eth_timesync_read_rx_timestamp_t)(struct rte_eth_dev *dev,
                                                struct timespec *timestamp,
                                                uint32_t flags);

/** @internal Function used to read a Tx IEEE1588/802.1AS timestamp. */
typedef int (*eth_timesync_read_tx_timestamp_t)(struct rte_eth_dev *dev,
                                                struct timespec *timestamp);

/** @internal Function used to adjust the device clock. */
typedef int (*eth_timesync_adjust_time)(struct rte_eth_dev *dev, int64_t);

/** @internal Function used to get time from the device clock. */
typedef int (*eth_timesync_read_time)(struct rte_eth_dev *dev,
                                      struct timespec *timestamp);

/** @internal Function used to get time from the device clock. */
typedef int (*eth_timesync_write_time)(struct rte_eth_dev *dev,
                                       const struct timespec *timestamp);

/** @internal Function used to get the current value of the device clock. */
typedef int (*eth_read_clock)(struct rte_eth_dev *dev,
                                      uint64_t *timestamp);

/** @internal Retrieve registers. */
typedef int (*eth_get_reg_t)(struct rte_eth_dev *dev,
                                struct rte_dev_reg_info *info);

/** @internal Retrieve EEPROM size. */
typedef int (*eth_get_eeprom_length_t)(struct rte_eth_dev *dev);

/** @internal Retrieve EEPROM data. */
typedef int (*eth_get_eeprom_t)(struct rte_eth_dev *dev,
                                struct rte_dev_eeprom_info *info);

/** @internal Program EEPROM data. */
typedef int (*eth_set_eeprom_t)(struct rte_eth_dev *dev,
                                struct rte_dev_eeprom_info *info);

/** @internal Retrieve type and size of plugin module EEPROM. */
typedef int (*eth_get_module_info_t)(struct rte_eth_dev *dev,
                                     struct rte_eth_dev_module_info *modinfo);

/** @internal Retrieve plugin module EEPROM data. */
typedef int (*eth_get_module_eeprom_t)(struct rte_eth_dev *dev,
                                       struct rte_dev_eeprom_info *info);

struct rte_flow_ops;
/**
 * @internal
 * Get flow operations.
 *
 * If the flow API is not supported for the specified device,
 * the driver can return NULL.
 */
typedef int (*eth_flow_ops_get_t)(struct rte_eth_dev *dev,
                                  const struct rte_flow_ops **ops);

/** @internal Get Traffic Management (TM) operations on an Ethernet device. */
typedef int (*eth_tm_ops_get_t)(struct rte_eth_dev *dev, void *ops);

/** @internal Get Traffic Metering and Policing (MTR) operations. */
typedef int (*eth_mtr_ops_get_t)(struct rte_eth_dev *dev, void *ops);

/** @internal Get DCB information on an Ethernet device. */
typedef int (*eth_get_dcb_info)(struct rte_eth_dev *dev,
                                 struct rte_eth_dcb_info *dcb_info);

/** @internal Test if a port supports specific mempool ops. */
typedef int (*eth_pool_ops_supported_t)(struct rte_eth_dev *dev,
                                                const char *pool);

/**
 * @internal
 * Get the hairpin capabilities.
 *
 * @param dev
 *   ethdev handle of port.
 * @param cap
 *   returns the hairpin capabilities from the device.
 *
 * @return
 *   Negative errno value on error, 0 on success.
 *
 * @retval 0
 *   Success, hairpin is supported.
 * @retval -ENOTSUP
 *   Hairpin is not supported.
 */
typedef int (*eth_hairpin_cap_get_t)(struct rte_eth_dev *dev,
                                     struct rte_eth_hairpin_cap *cap);

/**
 * @internal
 * Setup Rx hairpin queue.
 *
 * @param dev
 *   ethdev handle of port.
 * @param rx_queue_id
 *   the selected Rx queue index.
 * @param nb_rx_desc
 *   the requested number of descriptors for this queue. 0 - use PMD default.
 * @param conf
 *   the Rx hairpin configuration structure.
 *
 * @return
 *   Negative errno value on error, 0 on success.
 *
 * @retval 0
 *   Success, hairpin is supported.
 * @retval -ENOTSUP
 *   Hairpin is not supported.
 * @retval -EINVAL
 *   One of the parameters is invalid.
 * @retval -ENOMEM
 *   Unable to allocate resources.
 */
typedef int (*eth_rx_hairpin_queue_setup_t)
        (struct rte_eth_dev *dev, uint16_t rx_queue_id,
         uint16_t nb_rx_desc,
         const struct rte_eth_hairpin_conf *conf);

/**
 * @internal
 * Setup Tx hairpin queue.
 *
 * @param dev
 *   ethdev handle of port.
 * @param tx_queue_id
 *   the selected Tx queue index.
 * @param nb_tx_desc
 *   the requested number of descriptors for this queue. 0 - use PMD default.
 * @param conf
 *   the Tx hairpin configuration structure.
 *
 * @return
 *   Negative errno value on error, 0 on success.
 *
 * @retval 0
 *   Success, hairpin is supported.
 * @retval -ENOTSUP
 *   Hairpin is not supported.
 * @retval -EINVAL
 *   One of the parameters is invalid.
 * @retval -ENOMEM
 *   Unable to allocate resources.
 */
typedef int (*eth_tx_hairpin_queue_setup_t)
        (struct rte_eth_dev *dev, uint16_t tx_queue_id,
         uint16_t nb_tx_desc,
         const struct rte_eth_hairpin_conf *hairpin_conf);

/**
 * @internal
 * Get Forward Error Correction(FEC) capability.
 *
 * @param dev
 *   ethdev handle of port.
 * @param speed_fec_capa
 *   speed_fec_capa is out only with per-speed capabilities.
 * @param num
 *   a number of elements in an speed_fec_capa array.
 *
 * @return
 *   Negative errno value on error, positive value on success.
 *
 * @retval positive value
 *   A non-negative value lower or equal to num: success. The return value
 *   is the number of entries filled in the fec capa array.
 *   A non-negative value higher than num: error, the given fec capa array
 *   is too small. The return value corresponds to the num that should
 *   be given to succeed. The entries in the fec capa array are not valid
 *   and shall not be used by the caller.
 * @retval -ENOTSUP
 *   Operation is not supported.
 * @retval -EIO
 *   Device is removed.
 * @retval -EINVAL
 *   *num* or *speed_fec_capa* invalid.
 */
typedef int (*eth_fec_get_capability_t)(struct rte_eth_dev *dev,
                struct rte_eth_fec_capa *speed_fec_capa, unsigned int num);

/**
 * @internal
 * Get Forward Error Correction(FEC) mode.
 *
 * @param dev
 *   ethdev handle of port.
 * @param fec_capa
 *   a bitmask of enabled FEC modes. If AUTO bit is set, other
 *   bits specify FEC modes which may be negotiated. If AUTO
 *   bit is clear, specify FEC modes to be used (only one valid
 *   mode per speed may be set).
 *
 * @return
 *   Negative errno value on error, 0 on success.
 *
 * @retval 0
 *   Success, get FEC success.
 * @retval -ENOTSUP
 *   Operation is not supported.
 * @retval -EIO
 *   Device is removed.
 */
typedef int (*eth_fec_get_t)(struct rte_eth_dev *dev,
                             uint32_t *fec_capa);

/**
 * @internal
 * Set Forward Error Correction(FEC) mode.
 *
 * @param dev
 *   ethdev handle of port.
 * @param fec_capa
 *   bitmask of allowed FEC modes. It must be only one
 *   if AUTO is disabled. If AUTO is enabled, other
 *   bits specify FEC modes which may be negotiated.
 *
 * @return
 *   Negative errno value on error, 0 on success.
 *
 * @retval 0
 *   Success, set FEC success.
 * @retval -ENOTSUP
 *   Operation is not supported.
 * @retval -EINVAL
 *   Unsupported FEC mode requested.
 * @retval -EIO
 *   Device is removed.
 */
typedef int (*eth_fec_set_t)(struct rte_eth_dev *dev, uint32_t fec_capa);

/**
 * @internal
 * Get all hairpin Tx/Rx peer ports of the current device, if any.
 *
 * @param dev
 *   ethdev handle of port.
 * @param peer_ports
 *   array to save the ports list.
 * @param len
 *   array length.
 * @param direction
 *   value to decide the current to peer direction
 *   positive - used as Tx to get all peer Rx ports.
 *   zero - used as Rx to get all peer Tx ports.
 *
 * @return
 *   Negative errno value on error, 0 or positive on success.
 *
 * @retval 0
 *   Success, no peer ports.
 * @retval >0
 *   Actual number of the peer ports.
 * @retval -ENOTSUP
 *   Get peer ports API is not supported.
 * @retval -EINVAL
 *   One of the parameters is invalid.
 */
typedef int (*hairpin_get_peer_ports_t)(struct rte_eth_dev *dev,
                                        uint16_t *peer_ports, size_t len,
                                        uint32_t direction);

/**
 * @internal
 * Bind all hairpin Tx queues of one port to the Rx queues of the peer port.
 *
 * @param dev
 *   ethdev handle of port.
 * @param rx_port
 *   the peer Rx port.
 *
 * @return
 *   Negative errno value on error, 0 on success.
 *
 * @retval 0
 *   Success, bind successfully.
 * @retval -ENOTSUP
 *   Bind API is not supported.
 * @retval -EINVAL
 *   One of the parameters is invalid.
 * @retval -EBUSY
 *   Device is not started.
 */
typedef int (*eth_hairpin_bind_t)(struct rte_eth_dev *dev,
                                uint16_t rx_port);

/**
 * @internal
 * Unbind all hairpin Tx queues of one port from the Rx queues of the peer port.
 *
 * @param dev
 *   ethdev handle of port.
 * @param rx_port
 *   the peer Rx port.
 *
 * @return
 *   Negative errno value on error, 0 on success.
 *
 * @retval 0
 *   Success, unbind successfully.
 * @retval -ENOTSUP
 *   Bind API is not supported.
 * @retval -EINVAL
 *   One of the parameters is invalid.
 * @retval -EBUSY
 *   Device is already stopped.
 */
typedef int (*eth_hairpin_unbind_t)(struct rte_eth_dev *dev,
                                  uint16_t rx_port);

/** @internal Update and fetch peer queue information. */
typedef int (*eth_hairpin_queue_peer_update_t)
        (struct rte_eth_dev *dev, uint16_t peer_queue,
         struct rte_hairpin_peer_info *current_info,
         struct rte_hairpin_peer_info *peer_info, uint32_t direction);

/** @internal Bind peer queue to the current queue with fetched information. */
typedef int (*eth_hairpin_queue_peer_bind_t)
        (struct rte_eth_dev *dev, uint16_t cur_queue,
         struct rte_hairpin_peer_info *peer_info, uint32_t direction);

/** @internal Unbind peer queue from the current queue. */
typedef int (*eth_hairpin_queue_peer_unbind_t)
        (struct rte_eth_dev *dev, uint16_t cur_queue, uint32_t direction);

/**
 * @internal
 * Get address of memory location whose contents will change whenever there is
 * new data to be received on an Rx queue.
 *
 * @param rxq
 *   Ethdev queue pointer.
 * @param pmc
 *   The pointer to power-optimized monitoring condition structure.
 * @return
 *   Negative errno value on error, 0 on success.
 *
 * @retval 0
 *   Success
 * @retval -EINVAL
 *   Invalid parameters
 */
typedef int (*eth_get_monitor_addr_t)(void *rxq,
                struct rte_power_monitor_cond *pmc);

/**
 * @internal
 * Get representor info to be able to calculate the unique representor ID.
 *
 * Caller should pass NULL as pointer of info to get number of entries,
 * allocate info buffer according to returned entry number, then call
 * again with buffer to get real info.
 *
 * To calculate the representor ID, caller should iterate each entry,
 * match controller index, pf index, vf or sf start index and range,
 * then calculate representor ID from offset to vf/sf start index.
 * @see rte_eth_representor_id_get.
 *
 * @param dev
 *   Ethdev handle of port.
 * @param [out] info
 *   Pointer to memory to save device representor info.
 * @return
 *   Negative errno value on error, number of info entries otherwise.
 */

typedef int (*eth_representor_info_get_t)(struct rte_eth_dev *dev,
        struct rte_eth_representor_info *info);

/**
 * @internal
 * Negotiate the NIC's ability to deliver specific kinds of metadata to the PMD.
 *
 * @param dev
 *   Port (ethdev) handle
 *
 * @param[inout] features
 *   Feature selection buffer
 *
 * @return
 *   Negative errno value on error, zero otherwise
 */
typedef int (*eth_rx_metadata_negotiate_t)(struct rte_eth_dev *dev,
                                       uint64_t *features);

/**
 * @internal A structure containing the functions exported by an Ethernet driver.
 */
struct eth_dev_ops {
        eth_dev_configure_t        dev_configure; /**< Configure device */
        eth_dev_start_t            dev_start;     /**< Start device */
        eth_dev_stop_t             dev_stop;      /**< Stop device */
        eth_dev_set_link_up_t      dev_set_link_up;   /**< Device link up */
        eth_dev_set_link_down_t    dev_set_link_down; /**< Device link down */
        eth_dev_close_t            dev_close;     /**< Close device */
        eth_dev_reset_t            dev_reset;     /**< Reset device */
        eth_link_update_t          link_update;   /**< Get device link state */
        /** Check if the device was physically removed */
        eth_is_removed_t           is_removed;

        eth_promiscuous_enable_t   promiscuous_enable; /**< Promiscuous ON */
        eth_promiscuous_disable_t  promiscuous_disable;/**< Promiscuous OFF */
        eth_allmulticast_enable_t  allmulticast_enable;/**< Rx multicast ON */
        eth_allmulticast_disable_t allmulticast_disable;/**< Rx multicast OFF */
        eth_mac_addr_remove_t      mac_addr_remove; /**< Remove MAC address */
        eth_mac_addr_add_t         mac_addr_add;  /**< Add a MAC address */
        eth_mac_addr_set_t         mac_addr_set;  /**< Set a MAC address */
        /** Set list of multicast addresses */
        eth_set_mc_addr_list_t     set_mc_addr_list;
        mtu_set_t                  mtu_set;       /**< Set MTU */

        /** Get generic device statistics */
        eth_stats_get_t            stats_get;
        /** Reset generic device statistics */
        eth_stats_reset_t          stats_reset;
        /** Get extended device statistics */
        eth_xstats_get_t           xstats_get;
        /** Reset extended device statistics */
        eth_xstats_reset_t         xstats_reset;
        /** Get names of extended statistics */
        eth_xstats_get_names_t     xstats_get_names;
        /** Configure per queue stat counter mapping */
        eth_queue_stats_mapping_set_t queue_stats_mapping_set;

        eth_dev_infos_get_t        dev_infos_get; /**< Get device info */
        /** Retrieve Rx queue information */
        eth_rxq_info_get_t         rxq_info_get;
        /** Retrieve Tx queue information */
        eth_txq_info_get_t         txq_info_get;
        eth_burst_mode_get_t       rx_burst_mode_get; /**< Get Rx burst mode */
        eth_burst_mode_get_t       tx_burst_mode_get; /**< Get Tx burst mode */
        eth_fw_version_get_t       fw_version_get; /**< Get firmware version */

        /** Get packet types supported and identified by device */
        eth_dev_supported_ptypes_get_t dev_supported_ptypes_get;
        /**
         * Inform Ethernet device about reduced range of packet types to
         * handle
         */
        eth_dev_ptypes_set_t dev_ptypes_set;

        /** Filter VLAN Setup */
        vlan_filter_set_t          vlan_filter_set;
        /** Outer/Inner VLAN TPID Setup */
        vlan_tpid_set_t            vlan_tpid_set;
        /** VLAN Stripping on queue */
        vlan_strip_queue_set_t     vlan_strip_queue_set;
        /** Set VLAN Offload */
        vlan_offload_set_t         vlan_offload_set;
        /** Set port based Tx VLAN insertion */
        vlan_pvid_set_t            vlan_pvid_set;

        eth_queue_start_t          rx_queue_start;/**< Start Rx for a queue */
        eth_queue_stop_t           rx_queue_stop; /**< Stop Rx for a queue */
        eth_queue_start_t          tx_queue_start;/**< Start Tx for a queue */
        eth_queue_stop_t           tx_queue_stop; /**< Stop Tx for a queue */
        eth_rx_queue_setup_t       rx_queue_setup;/**< Set up device Rx queue */
        eth_queue_release_t        rx_queue_release; /**< Release Rx queue */

        /** Enable Rx queue interrupt */
        eth_rx_enable_intr_t       rx_queue_intr_enable;
        /** Disable Rx queue interrupt */
        eth_rx_disable_intr_t      rx_queue_intr_disable;

        eth_tx_queue_setup_t       tx_queue_setup;/**< Set up device Tx queue */
        eth_queue_release_t        tx_queue_release; /**< Release Tx queue */
        eth_tx_done_cleanup_t      tx_done_cleanup;/**< Free Tx ring mbufs */

        eth_dev_led_on_t           dev_led_on;    /**< Turn on LED */
        eth_dev_led_off_t          dev_led_off;   /**< Turn off LED */

        flow_ctrl_get_t            flow_ctrl_get; /**< Get flow control */
        flow_ctrl_set_t            flow_ctrl_set; /**< Setup flow control */
        /** Setup priority flow control */
        priority_flow_ctrl_set_t   priority_flow_ctrl_set;
        /** Priority flow control queue info get */
        priority_flow_ctrl_queue_info_get_t priority_flow_ctrl_queue_info_get;
        /** Priority flow control queue configure */
        priority_flow_ctrl_queue_config_t priority_flow_ctrl_queue_config;

        /** Set Unicast Table Array */
        eth_uc_hash_table_set_t    uc_hash_table_set;
        /** Set Unicast hash bitmap */
        eth_uc_all_hash_table_set_t uc_all_hash_table_set;

        /** Add UDP tunnel port */
        eth_udp_tunnel_port_add_t  udp_tunnel_port_add;
        /** Delete UDP tunnel port */
        eth_udp_tunnel_port_del_t  udp_tunnel_port_del;

        /** Set queue rate limit */
        eth_set_queue_rate_limit_t set_queue_rate_limit;

        /** Configure RSS hash protocols and hashing key */
        rss_hash_update_t          rss_hash_update;
        /** Get current RSS hash configuration */
        rss_hash_conf_get_t        rss_hash_conf_get;
        /** Update redirection table */
        reta_update_t              reta_update;
        /** Query redirection table */
        reta_query_t               reta_query;

        eth_get_reg_t              get_reg;           /**< Get registers */
        eth_get_eeprom_length_t    get_eeprom_length; /**< Get EEPROM length */
        eth_get_eeprom_t           get_eeprom;        /**< Get EEPROM data */
        eth_set_eeprom_t           set_eeprom;        /**< Set EEPROM */

        /** Get plugin module EEPROM attribute */
        eth_get_module_info_t      get_module_info;
        /** Get plugin module EEPROM data */
        eth_get_module_eeprom_t    get_module_eeprom;

        eth_flow_ops_get_t         flow_ops_get; /**< Get flow operations */

        eth_get_dcb_info           get_dcb_info; /**< Get DCB information */

        /** Turn IEEE1588/802.1AS timestamping on */
        eth_timesync_enable_t      timesync_enable;
        /** Turn IEEE1588/802.1AS timestamping off */
        eth_timesync_disable_t     timesync_disable;
        /** Read the IEEE1588/802.1AS Rx timestamp */
        eth_timesync_read_rx_timestamp_t timesync_read_rx_timestamp;
        /** Read the IEEE1588/802.1AS Tx timestamp */
        eth_timesync_read_tx_timestamp_t timesync_read_tx_timestamp;
        /** Adjust the device clock */
        eth_timesync_adjust_time   timesync_adjust_time;
        /** Get the device clock time */
        eth_timesync_read_time     timesync_read_time;
        /** Set the device clock time */
        eth_timesync_write_time    timesync_write_time;

        eth_read_clock             read_clock;

        /** Get extended device statistic values by ID */
        eth_xstats_get_by_id_t     xstats_get_by_id;
        /** Get name of extended device statistics by ID */
        eth_xstats_get_names_by_id_t xstats_get_names_by_id;

        /** Get Traffic Management (TM) operations */
        eth_tm_ops_get_t tm_ops_get;

        /** Get Traffic Metering and Policing (MTR) operations */
        eth_mtr_ops_get_t mtr_ops_get;

        /** Test if a port supports specific mempool ops */
        eth_pool_ops_supported_t pool_ops_supported;

        /** Returns the hairpin capabilities */
        eth_hairpin_cap_get_t hairpin_cap_get;
        /** Set up device Rx hairpin queue */
        eth_rx_hairpin_queue_setup_t rx_hairpin_queue_setup;
        /** Set up device Tx hairpin queue */
        eth_tx_hairpin_queue_setup_t tx_hairpin_queue_setup;

        /** Get Forward Error Correction(FEC) capability */
        eth_fec_get_capability_t fec_get_capability;
        /** Get Forward Error Correction(FEC) mode */
        eth_fec_get_t fec_get;
        /** Set Forward Error Correction(FEC) mode */
        eth_fec_set_t fec_set;

        /** Get hairpin peer ports list */
        hairpin_get_peer_ports_t hairpin_get_peer_ports;
        /** Bind all hairpin Tx queues of device to the peer port Rx queues */
        eth_hairpin_bind_t hairpin_bind;
        /** Unbind all hairpin Tx queues from the peer port Rx queues */
        eth_hairpin_unbind_t hairpin_unbind;
        /** Pass the current queue info and get the peer queue info */
        eth_hairpin_queue_peer_update_t hairpin_queue_peer_update;
        /** Set up the connection between the pair of hairpin queues */
        eth_hairpin_queue_peer_bind_t hairpin_queue_peer_bind;
        /** Disconnect the hairpin queues of a pair from each other */
        eth_hairpin_queue_peer_unbind_t hairpin_queue_peer_unbind;

        /** Get power monitoring condition for Rx queue */
        eth_get_monitor_addr_t get_monitor_addr;

        /** Get representor info */
        eth_representor_info_get_t representor_info_get;

        /**
         * Negotiate the NIC's ability to deliver specific
         * kinds of metadata to the PMD
         */
        eth_rx_metadata_negotiate_t rx_metadata_negotiate;
};

/**
 * @internal
 * Check if the selected Rx queue is hairpin queue.
 *
 * @param dev
 *  Pointer to the selected device.
 * @param queue_id
 *  The selected queue.
 *
 * @return
 *   - (1) if the queue is hairpin queue, 0 otherwise.
 */
__rte_internal
int rte_eth_dev_is_rx_hairpin_queue(struct rte_eth_dev *dev, uint16_t queue_id);

/**
 * @internal
 * Check if the selected Tx queue is hairpin queue.
 *
 * @param dev
 *  Pointer to the selected device.
 * @param queue_id
 *  The selected queue.
 *
 * @return
 *   - (1) if the queue is hairpin queue, 0 otherwise.
 */
__rte_internal
int rte_eth_dev_is_tx_hairpin_queue(struct rte_eth_dev *dev, uint16_t queue_id);

/**
 * @internal
 * Returns a ethdev slot specified by the unique identifier name.
 *
 * @param       name
 *  The pointer to the Unique identifier name for each Ethernet device
 * @return
 *   - The pointer to the ethdev slot, on success. NULL on error
 */
__rte_internal
struct rte_eth_dev *rte_eth_dev_allocated(const char *name);

/**
 * @internal
 * Allocates a new ethdev slot for an Ethernet device and returns the pointer
 * to that slot for the driver to use.
 *
 * @param       name    Unique identifier name for each Ethernet device
 * @return
 *   - Slot in the rte_dev_devices array for a new device;
 */
__rte_internal
struct rte_eth_dev *rte_eth_dev_allocate(const char *name);

/**
 * @internal
 * Attach to the ethdev already initialized by the primary
 * process.
 *
 * @param       name    Ethernet device's name.
 * @return
 *   - Success: Slot in the rte_dev_devices array for attached
 *        device.
 *   - Error: Null pointer.
 */
__rte_internal
struct rte_eth_dev *rte_eth_dev_attach_secondary(const char *name);

/**
 * @internal
 * Notify RTE_ETH_EVENT_DESTROY and release the specified ethdev port.
 *
 * The following PMD-managed data fields will be freed:
 *   - dev_private
 *   - mac_addrs
 *   - hash_mac_addrs
 * If one of these fields should not be freed,
 * it must be reset to NULL by the PMD, typically in dev_close method.
 *
 * @param eth_dev
 * Device to be detached.
 * @return
 *   - 0 on success, negative on error
 */
__rte_internal
int rte_eth_dev_release_port(struct rte_eth_dev *eth_dev);

/**
 * @internal
 * Release device queues and clear its configuration to force the user
 * application to reconfigure it. It is for internal use only.
 *
 * @param dev
 *  Pointer to struct rte_eth_dev.
 *
 * @return
 *  void
 */
__rte_internal
void rte_eth_dev_internal_reset(struct rte_eth_dev *dev);

/**
 * @internal Executes all the user application registered callbacks for
 * the specific device. It is for DPDK internal user only. User
 * application should not call it directly.
 *
 * @param dev
 *  Pointer to struct rte_eth_dev.
 * @param event
 *  Eth device interrupt event type.
 * @param ret_param
 *  To pass data back to user application.
 *  This allows the user application to decide if a particular function
 *  is permitted or not.
 *
 * @return
 *  int
 */
__rte_internal
int rte_eth_dev_callback_process(struct rte_eth_dev *dev,
                enum rte_eth_event_type event, void *ret_param);

/**
 * @internal
 * This is the last step of device probing.
 * It must be called after a port is allocated and initialized successfully.
 *
 * The notification RTE_ETH_EVENT_NEW is sent to other entities
 * (libraries and applications).
 * The state is set as RTE_ETH_DEV_ATTACHED.
 *
 * @param dev
 *  New ethdev port.
 */
__rte_internal
void rte_eth_dev_probing_finish(struct rte_eth_dev *dev);

/**
 * Create memzone for HW rings.
 * malloc can't be used as the physical address is needed.
 * If the memzone is already created, then this function returns a ptr
 * to the old one.
 *
 * @param eth_dev
 *   The *eth_dev* pointer is the address of the *rte_eth_dev* structure
 * @param name
 *   The name of the memory zone
 * @param queue_id
 *   The index of the queue to add to name
 * @param size
 *   The sizeof of the memory area
 * @param align
 *   Alignment for resulting memzone. Must be a power of 2.
 * @param socket_id
 *   The *socket_id* argument is the socket identifier in case of NUMA.
 */
__rte_internal
const struct rte_memzone *
rte_eth_dma_zone_reserve(const struct rte_eth_dev *eth_dev, const char *name,
                         uint16_t queue_id, size_t size,
                         unsigned align, int socket_id);

/**
 * Free previously allocated memzone for HW rings.
 *
 * @param eth_dev
 *   The *eth_dev* pointer is the address of the *rte_eth_dev* structure
 * @param name
 *   The name of the memory zone
 * @param queue_id
 *   The index of the queue to add to name
 * @return
 *   Negative errno value on error, 0 on success.
 */
__rte_internal
int
rte_eth_dma_zone_free(const struct rte_eth_dev *eth_dev, const char *name,
                 uint16_t queue_id);

/**
 * @internal
 * Atomically set the link status for the specific device.
 * It is for use by DPDK device driver use only.
 * User applications should not call it
 *
 * @param dev
 *  Pointer to struct rte_eth_dev.
 * @param link
 *  New link status value.
 * @return
 *  Same convention as eth_link_update operation.
 *  0   if link up status has changed
 *  -1  if link up status was unchanged
 */
static inline int
rte_eth_linkstatus_set(struct rte_eth_dev *dev,
                       const struct rte_eth_link *new_link)
{
        uint64_t *dev_link = (uint64_t *)&(dev->data->dev_link);
        union {
                uint64_t val64;
                struct rte_eth_link link;
        } orig;

        RTE_BUILD_BUG_ON(sizeof(*new_link) != sizeof(uint64_t));

        orig.val64 = __atomic_exchange_n(dev_link, *(const uint64_t *)new_link,
                                        __ATOMIC_SEQ_CST);

        return (orig.link.link_status == new_link->link_status) ? -1 : 0;
}

/**
 * @internal
 * Atomically get the link speed and status.
 *
 * @param dev
 *  Pointer to struct rte_eth_dev.
 * @param link
 *  link status value.
 */
static inline void
rte_eth_linkstatus_get(const struct rte_eth_dev *dev,
                       struct rte_eth_link *link)
{
        uint64_t *src = (uint64_t *)&(dev->data->dev_link);
        uint64_t *dst = (uint64_t *)link;

        RTE_BUILD_BUG_ON(sizeof(*link) != sizeof(uint64_t));

        *dst = __atomic_load_n(src, __ATOMIC_SEQ_CST);
}

/**
 * Allocate an unique switch domain identifier.
 *
 * A pool of switch domain identifiers which can be allocated on request. This
 * will enabled devices which support the concept of switch domains to request
 * a switch domain ID which is guaranteed to be unique from other devices
 * running in the same process.
 *
 * @param domain_id
 *  switch domain identifier parameter to pass back to application
 *
 * @return
 *   Negative errno value on error, 0 on success.
 */
__rte_internal
int
rte_eth_switch_domain_alloc(uint16_t *domain_id);

/**
 * Free switch domain.
 *
 * Return a switch domain identifier to the pool of free identifiers after it is
 * no longer in use by device.
 *
 * @param domain_id
 *  switch domain identifier to free
 *
 * @return
 *   Negative errno value on error, 0 on success.
 */
__rte_internal
int
rte_eth_switch_domain_free(uint16_t domain_id);

/**
 * Generic Ethernet device arguments
 *
 * One type of representor each structure.
 */
struct rte_eth_devargs {
        uint16_t mh_controllers[RTE_MAX_MULTI_HOST_CTRLS];
        /** controller/s number in case of multi-host */
        uint16_t nb_mh_controllers;
        /** number of controllers in multi-host controllers field */
        uint16_t ports[RTE_MAX_ETHPORTS];
        /** port/s number to enable on a multi-port single function */
        uint16_t nb_ports;
        /** number of ports in ports field */
        uint16_t representor_ports[RTE_MAX_ETHPORTS];
        /** representor port/s identifier to enable on device */
        uint16_t nb_representor_ports;
        /** number of ports in representor port field */
        enum rte_eth_representor_type type; /* type of representor */
};

/**
 * PMD helper function to get representor ID from location detail.
 *
 * Get representor ID from controller, pf and (sf or vf).
 * The mapping is retrieved from rte_eth_representor_info_get().
 *
 * For backward compatibility, if no representor info, direct
 * map legacy VF (no controller and pf).
 *
 * @param port_id
 *  Port ID of the backing device.
 * @param type
 *  Representor type.
 * @param controller
 *  Controller ID, -1 if unspecified.
 * @param pf
 *  PF port ID, -1 if unspecified.
 * @param representor_port
 *  VF or SF representor port number, -1 if unspecified.
 * @param repr_id
 *  Pointer to output representor ID.
 *
 * @return
 *  Negative errno value on error, 0 on success.
 */
__rte_internal
int
rte_eth_representor_id_get(uint16_t port_id,
                           enum rte_eth_representor_type type,
                           int controller, int pf, int representor_port,
                           uint16_t *repr_id);

/**
 * PMD helper function to parse ethdev arguments
 *
 * @param devargs
 *  device arguments
 * @param eth_devargs
 *  parsed ethdev specific arguments.
 *
 * @return
 *   Negative errno value on error, 0 on success.
 */
__rte_internal
int
rte_eth_devargs_parse(const char *devargs, struct rte_eth_devargs *eth_devargs);


typedef int (*ethdev_init_t)(struct rte_eth_dev *ethdev, void *init_params);
typedef int (*ethdev_bus_specific_init)(struct rte_eth_dev *ethdev,
        void *bus_specific_init_params);

/**
 * PMD helper function for the creation of a new ethdev ports.
 *
 * @param device
 *  rte_device handle.
 * @param name
 *  port name.
 * @param priv_data_size
 *  size of private data required for port.
 * @param bus_specific_init
 *  port bus specific initialisation callback function
 * @param bus_init_params
 *  port bus specific initialisation parameters
 * @param ethdev_init
 *  device specific port initialization callback function
 * @param init_params
 *  port initialisation parameters
 *
 * @return
 *   Negative errno value on error, 0 on success.
 */
__rte_internal
int
rte_eth_dev_create(struct rte_device *device, const char *name,
        size_t priv_data_size,
        ethdev_bus_specific_init bus_specific_init, void *bus_init_params,
        ethdev_init_t ethdev_init, void *init_params);


typedef int (*ethdev_uninit_t)(struct rte_eth_dev *ethdev);

/**
 * PMD helper function for cleaning up the resources of a ethdev port on it's
 * destruction.
 *
 * @param ethdev
 *   ethdev handle of port.
 * @param ethdev_uninit
 *   device specific port un-initialise callback function
 *
 * @return
 *   Negative errno value on error, 0 on success.
 */
__rte_internal
int
rte_eth_dev_destroy(struct rte_eth_dev *ethdev, ethdev_uninit_t ethdev_uninit);

/**
 * @internal
 * Pass the current hairpin queue HW and/or SW information to the peer queue
 * and fetch back the information of the peer queue.
 *
 * @param peer_port
 *  Peer port identifier of the Ethernet device.
 * @param peer_queue
 *  Peer queue index of the port.
 * @param cur_info
 *  Pointer to the current information structure.
 * @param peer_info
 *  Pointer to the peer information, output.
 * @param direction
 *  Direction to pass the information.
 *  positive - pass Tx queue information and get peer Rx queue information
 *  zero - pass Rx queue information and get peer Tx queue information
 *
 * @return
 *  Negative errno value on error, 0 on success.
 */
__rte_internal
int
rte_eth_hairpin_queue_peer_update(uint16_t peer_port, uint16_t peer_queue,
                                  struct rte_hairpin_peer_info *cur_info,
                                  struct rte_hairpin_peer_info *peer_info,
                                  uint32_t direction);

/**
 * @internal
 * Configure current hairpin queue with the peer information fetched to create
 * the connection (bind) with peer queue in the specified direction.
 * This function might need to be called twice to fully create the connections.
 *
 * @param cur_port
 *  Current port identifier of the Ethernet device.
 * @param cur_queue
 *  Current queue index of the port.
 * @param peer_info
 *  Pointer to the peer information, input.
 * @param direction
 *  Direction to create the connection.
 *  positive - bind current Tx queue to peer Rx queue
 *  zero - bind current Rx queue to peer Tx queue
 *
 * @return
 *  Negative errno value on error, 0 on success.
 */
__rte_internal
int
rte_eth_hairpin_queue_peer_bind(uint16_t cur_port, uint16_t cur_queue,
                                struct rte_hairpin_peer_info *peer_info,
                                uint32_t direction);

/**
 * @internal
 * Get rte_eth_dev from device name. The device name should be specified
 * as below:
 * - PCIe address (Domain:Bus:Device.Function), for example 0000:2:00.0
 * - SoC device name, for example fsl-gmac0
 * - vdev dpdk name, for example net_[pcap0|null0|tap0]
 *
 * @param name
 *   PCI address or name of the device
 * @return
 *   - rte_eth_dev if successful
 *   - NULL on failure
 */
__rte_internal
struct rte_eth_dev*
rte_eth_dev_get_by_name(const char *name);

/**
 * @internal
 * Reset the current queue state and configuration to disconnect (unbind) it
 * from the peer queue.
 * This function might need to be called twice to disconnect each other.
 *
 * @param cur_port
 *  Current port identifier of the Ethernet device.
 * @param cur_queue
 *  Current queue index of the port.
 * @param direction
 *  Direction to destroy the connection.
 *  positive - unbind current Tx queue from peer Rx queue
 *  zero - unbind current Rx queue from peer Tx queue
 *
 * @return
 *  Negative errno value on error, 0 on success.
 */
__rte_internal
int
rte_eth_hairpin_queue_peer_unbind(uint16_t cur_port, uint16_t cur_queue,
                                  uint32_t direction);


/*
 * Legacy ethdev API used internally by drivers.
 */

enum rte_filter_type {
        RTE_ETH_FILTER_NONE = 0,
        RTE_ETH_FILTER_ETHERTYPE,
        RTE_ETH_FILTER_FLEXIBLE,
        RTE_ETH_FILTER_SYN,
        RTE_ETH_FILTER_NTUPLE,
        RTE_ETH_FILTER_TUNNEL,
        RTE_ETH_FILTER_FDIR,
        RTE_ETH_FILTER_HASH,
        RTE_ETH_FILTER_L2_TUNNEL,
};

/**
 * Define all structures for Ethertype Filter type.
 */

#define RTE_ETHTYPE_FLAGS_MAC    0x0001 /**< If set, compare mac */
#define RTE_ETHTYPE_FLAGS_DROP   0x0002 /**< If set, drop packet when match */

/**
 * A structure used to define the ethertype filter entry
 * to support RTE_ETH_FILTER_ETHERTYPE data representation.
 */
struct rte_eth_ethertype_filter {
        struct rte_ether_addr mac_addr;   /**< Mac address to match */
        uint16_t ether_type;          /**< Ether type to match */
        uint16_t flags;               /**< Flags from RTE_ETHTYPE_FLAGS_* */
        uint16_t queue;               /**< Queue assigned to when match */
};

/**
 * A structure used to define the TCP syn filter entry
 * to support RTE_ETH_FILTER_SYN data representation.
 */
struct rte_eth_syn_filter {
        /** 1 - higher priority than other filters, 0 - lower priority */
        uint8_t hig_pri;
        uint16_t queue;      /**< Queue assigned to when match */
};

/**
 * filter type of tunneling packet
 */
#define RTE_ETH_TUNNEL_FILTER_OMAC  0x01 /**< filter by outer MAC addr */
#define RTE_ETH_TUNNEL_FILTER_OIP   0x02 /**< filter by outer IP Addr */
#define RTE_ETH_TUNNEL_FILTER_TENID 0x04 /**< filter by tenant ID */
#define RTE_ETH_TUNNEL_FILTER_IMAC  0x08 /**< filter by inner MAC addr */
#define RTE_ETH_TUNNEL_FILTER_IVLAN 0x10 /**< filter by inner VLAN ID */
#define RTE_ETH_TUNNEL_FILTER_IIP   0x20 /**< filter by inner IP addr */

#define RTE_ETH_TUNNEL_FILTER_IMAC_IVLAN (RTE_ETH_TUNNEL_FILTER_IMAC | \
                                          RTE_ETH_TUNNEL_FILTER_IVLAN)
#define RTE_ETH_TUNNEL_FILTER_IMAC_IVLAN_TENID (RTE_ETH_TUNNEL_FILTER_IMAC | \
                                                RTE_ETH_TUNNEL_FILTER_IVLAN | \
                                                RTE_ETH_TUNNEL_FILTER_TENID)
#define RTE_ETH_TUNNEL_FILTER_IMAC_TENID (RTE_ETH_TUNNEL_FILTER_IMAC | \
                                          RTE_ETH_TUNNEL_FILTER_TENID)
#define RTE_ETH_TUNNEL_FILTER_OMAC_TENID_IMAC (RTE_ETH_TUNNEL_FILTER_OMAC | \
                                               RTE_ETH_TUNNEL_FILTER_TENID | \
                                               RTE_ETH_TUNNEL_FILTER_IMAC)

/**
 *  Select IPv4 or IPv6 for tunnel filters.
 */
enum rte_tunnel_iptype {
        RTE_TUNNEL_IPTYPE_IPV4 = 0, /**< IPv4 */
        RTE_TUNNEL_IPTYPE_IPV6,     /**< IPv6 */
};

/**
 * Tunneling Packet filter configuration.
 */
struct rte_eth_tunnel_filter_conf {
        struct rte_ether_addr outer_mac;    /**< Outer MAC address to match */
        struct rte_ether_addr inner_mac;    /**< Inner MAC address to match */
        uint16_t inner_vlan;                /**< Inner VLAN to match */
        enum rte_tunnel_iptype ip_type;     /**< IP address type */
        /**
         * Outer destination IP address to match if ETH_TUNNEL_FILTER_OIP
         * is set in filter_type, or inner destination IP address to match
         * if ETH_TUNNEL_FILTER_IIP is set in filter_type.
         */
        union {
                uint32_t ipv4_addr;         /**< IPv4 address in big endian */
                uint32_t ipv6_addr[4];      /**< IPv6 address in big endian */
        } ip_addr;
        /** Flags from ETH_TUNNEL_FILTER_XX - see above */
        uint16_t filter_type;
        enum rte_eth_tunnel_type tunnel_type; /**< Tunnel Type */
        uint32_t tenant_id;     /**< Tenant ID to match: VNI, GRE key... */
        uint16_t queue_id;      /**< Queue assigned to if match */
};

#endif /* _RTE_ETHDEV_DRIVER_H_ */