#include <stdint.h>
#include <rte_log.h>
#include <rte_interrupts.h>
#include <rte_pci.h>
#include <rte_dev.h>
#include <rte_devargs.h>
#include "rte_ether.h"
#include "rte_eth_ctrl.h"
#include "rte_dev_info.h"

Data Structures
struct	rte_eth_stats
struct	rte_eth_link
struct	rte_eth_thresh
struct	rte_eth_rxmode
struct	rte_eth_rss_conf
struct	rte_eth_vlan_mirror
struct	rte_eth_mirror_conf
struct	rte_eth_rss_reta_entry64
struct	rte_eth_vmdq_dcb_conf
struct	rte_eth_txmode
struct	rte_eth_rxconf
struct	rte_eth_txconf
struct	rte_eth_fc_conf
struct	rte_eth_pfc_conf
struct	rte_fdir_conf
struct	rte_eth_udp_tunnel
struct	rte_fdir_filter
struct	rte_fdir_masks
struct	rte_eth_fdir
struct	rte_intr_conf
struct	rte_eth_conf
struct	rte_eth_xstats

Macros
#define	ETH_LINK_SPEED_AUTONEG 0
#define	ETH_LINK_SPEED_10 10
#define	ETH_LINK_SPEED_100 100
#define	ETH_LINK_SPEED_1000 1000
#define	ETH_LINK_SPEED_10000 10000
#define	ETH_LINK_SPEED_10G 10000
#define	ETH_LINK_SPEED_20G 20000
#define	ETH_LINK_SPEED_40G 40000
#define	ETH_LINK_AUTONEG_DUPLEX 0
#define	ETH_LINK_HALF_DUPLEX 1
#define	ETH_LINK_FULL_DUPLEX 2
#define	ETH_MQ_RX_RSS_FLAG 0x1
#define	ETH_RSS ETH_MQ_RX_RSS
#define	ETH_DCB_NONE ETH_MQ_TX_NONE
#define	ETH_RSS_SCTP
#define	ETH_VMDQ_MAX_VLAN_FILTERS 64
#define	ETH_DCB_NUM_USER_PRIORITIES 8
#define	ETH_VMDQ_DCB_NUM_QUEUES 128
#define	ETH_DCB_NUM_QUEUES 128
#define	ETH_DCB_PG_SUPPORT 0x00000001
#define	ETH_DCB_PFC_SUPPORT 0x00000002
#define	ETH_VLAN_STRIP_OFFLOAD 0x0001
#define	ETH_VLAN_FILTER_OFFLOAD 0x0002
#define	ETH_VLAN_EXTEND_OFFLOAD 0x0004
#define	ETH_VLAN_STRIP_MASK 0x0001
#define	ETH_VLAN_FILTER_MASK 0x0002
#define	ETH_VLAN_EXTEND_MASK 0x0004
#define	ETH_VLAN_ID_MAX 0x0FFF
#define	ETH_NUM_RECEIVE_MAC_ADDR 128
#define	ETH_VMDQ_NUM_UC_HASH_ARRAY 128
#define	ETH_VMDQ_ACCEPT_UNTAG 0x0001
#define	ETH_VMDQ_ACCEPT_HASH_MC 0x0002
#define	ETH_VMDQ_ACCEPT_HASH_UC 0x0004
#define	ETH_VMDQ_ACCEPT_BROADCAST 0x0008
#define	ETH_VMDQ_ACCEPT_MULTICAST 0x0010
#define	ETH_MIRROR_MAX_VLANS 64
#define	ETH_MIRROR_VIRTUAL_POOL_UP 0x01
#define	ETH_MIRROR_UPLINK_PORT 0x02
#define	ETH_MIRROR_DOWNLINK_PORT 0x04
#define	ETH_MIRROR_VLAN 0x08
#define	ETH_MIRROR_VIRTUAL_POOL_DOWN 0x10
#define	ETH_TXQ_FLAGS_NOMULTSEGS 0x0001
#define	ETH_TXQ_FLAGS_NOREFCOUNT 0x0002
#define	ETH_TXQ_FLAGS_NOMULTMEMP 0x0004
#define	ETH_TXQ_FLAGS_NOVLANOFFL 0x0100
#define	ETH_TXQ_FLAGS_NOXSUMSCTP 0x0200
#define	ETH_TXQ_FLAGS_NOXSUMUDP 0x0400
#define	ETH_TXQ_FLAGS_NOXSUMTCP 0x0800
#define	DEV_RX_OFFLOAD_VLAN_STRIP 0x00000001
#define	DEV_TX_OFFLOAD_VLAN_INSERT 0x00000001
#define	DEV_TX_OFFLOAD_OUTER_IPV4_CKSUM 0x00000080
#define	RTE_ETH_XSTATS_NAME_SIZE 64

Typedefs
typedef uint16_t(*	rte_rx_callback_fn )(uint8_t port, uint16_t queue, struct rte_mbuf pkts[], uint16_t nb_pkts, uint16_t max_pkts, void user_param)
typedef uint16_t(*	rte_tx_callback_fn )(uint8_t port, uint16_t queue, struct rte_mbuf pkts[], uint16_t nb_pkts, void user_param)
typedef void(*	rte_eth_dev_cb_fn )(uint8_t port_id, enum rte_eth_event_type event, void *cb_arg)

Enumerations
enum	rte_eth_rx_mq_mode { ETH_MQ_RX_NONE = 0, ETH_MQ_RX_RSS = ETH_MQ_RX_RSS_FLAG, ETH_MQ_RX_DCB = ETH_MQ_RX_DCB_FLAG, ETH_MQ_RX_DCB_RSS = ETH_MQ_RX_RSS_FLAG \| ETH_MQ_RX_DCB_FLAG, ETH_MQ_RX_VMDQ_ONLY = ETH_MQ_RX_VMDQ_FLAG, ETH_MQ_RX_VMDQ_RSS = ETH_MQ_RX_RSS_FLAG \| ETH_MQ_RX_VMDQ_FLAG, ETH_MQ_RX_VMDQ_DCB = ETH_MQ_RX_VMDQ_FLAG \| ETH_MQ_RX_DCB_FLAG, ETH_MQ_RX_VMDQ_DCB_RSS }
enum	rte_eth_tx_mq_mode { ETH_MQ_TX_NONE = 0, ETH_MQ_TX_DCB, ETH_MQ_TX_VMDQ_DCB, ETH_MQ_TX_VMDQ_ONLY }
enum	rte_eth_nb_tcs { ETH_4_TCS = 4, ETH_8_TCS = 8 }
enum	rte_eth_nb_pools { ETH_8_POOLS = 8, ETH_16_POOLS = 16, ETH_32_POOLS = 32, ETH_64_POOLS = 64 }
enum	rte_eth_fc_mode { RTE_FC_NONE = 0, RTE_FC_RX_PAUSE, RTE_FC_TX_PAUSE, RTE_FC_FULL }
enum	rte_fdir_pballoc_type { RTE_FDIR_PBALLOC_64K = 0, RTE_FDIR_PBALLOC_128K, RTE_FDIR_PBALLOC_256K }
enum	rte_fdir_status_mode { RTE_FDIR_NO_REPORT_STATUS = 0, RTE_FDIR_REPORT_STATUS, RTE_FDIR_REPORT_STATUS_ALWAYS }
enum	rte_l4type { RTE_FDIR_L4TYPE_NONE = 0, RTE_FDIR_L4TYPE_UDP, RTE_FDIR_L4TYPE_TCP, RTE_FDIR_L4TYPE_SCTP }
enum	rte_iptype { RTE_FDIR_IPTYPE_IPV4 = 0, RTE_FDIR_IPTYPE_IPV6 }
enum	rte_eth_dev_type { RTE_ETH_DEV_UNKNOWN, RTE_ETH_DEV_PCI, RTE_ETH_DEV_VIRTUAL, RTE_ETH_DEV_MAX }
enum	rte_eth_event_type { RTE_ETH_EVENT_UNKNOWN, RTE_ETH_EVENT_INTR_LSC, RTE_ETH_EVENT_MAX }

Functions
uint8_t	rte_eth_dev_count (void)
int	rte_eth_dev_attach (const char devargs, uint8_t port_id)
int	rte_eth_dev_detach (uint8_t port_id, char *devname)
int	rte_eth_dev_configure (uint8_t port_id, uint16_t nb_rx_queue, uint16_t nb_tx_queue, const struct rte_eth_conf *eth_conf)
int	rte_eth_rx_queue_setup (uint8_t port_id, 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)
int	rte_eth_tx_queue_setup (uint8_t port_id, uint16_t tx_queue_id, uint16_t nb_tx_desc, unsigned int socket_id, const struct rte_eth_txconf *tx_conf)
int	rte_eth_dev_start (uint8_t port_id)
void	rte_eth_dev_stop (uint8_t port_id)
int	rte_eth_dev_set_link_up (uint8_t port_id)
int	rte_eth_dev_set_link_down (uint8_t port_id)
void	rte_eth_dev_close (uint8_t port_id)
void	rte_eth_promiscuous_enable (uint8_t port_id)
void	rte_eth_promiscuous_disable (uint8_t port_id)
int	rte_eth_promiscuous_get (uint8_t port_id)
void	rte_eth_allmulticast_enable (uint8_t port_id)
void	rte_eth_allmulticast_disable (uint8_t port_id)
int	rte_eth_allmulticast_get (uint8_t port_id)
void	rte_eth_link_get (uint8_t port_id, struct rte_eth_link *link)
void	rte_eth_link_get_nowait (uint8_t port_id, struct rte_eth_link *link)
int	rte_eth_stats_get (uint8_t port_id, struct rte_eth_stats *stats)
void	rte_eth_stats_reset (uint8_t port_id)
int	rte_eth_xstats_get (uint8_t port_id, struct rte_eth_xstats *xstats, unsigned n)
void	rte_eth_xstats_reset (uint8_t port_id)
int	rte_eth_dev_set_tx_queue_stats_mapping (uint8_t port_id, uint16_t tx_queue_id, uint8_t stat_idx)
int	rte_eth_dev_set_rx_queue_stats_mapping (uint8_t port_id, uint16_t rx_queue_id, uint8_t stat_idx)
void	rte_eth_macaddr_get (uint8_t port_id, struct ether_addr *mac_addr)
void	rte_eth_dev_info_get (uint8_t port_id, struct rte_eth_dev_info *dev_info)
int	rte_eth_dev_get_mtu (uint8_t port_id, uint16_t *mtu)
int	rte_eth_dev_set_mtu (uint8_t port_id, uint16_t mtu)
int	rte_eth_dev_vlan_filter (uint8_t port_id, uint16_t vlan_id, int on)
int	rte_eth_dev_set_vlan_strip_on_queue (uint8_t port_id, uint16_t rx_queue_id, int on)
int	rte_eth_dev_set_vlan_ether_type (uint8_t port_id, uint16_t tag_type)
int	rte_eth_dev_set_vlan_offload (uint8_t port_id, int offload_mask)
int	rte_eth_dev_get_vlan_offload (uint8_t port_id)
int	rte_eth_dev_set_vlan_pvid (uint8_t port_id, uint16_t pvid, int on)
static uint16_t	rte_eth_rx_burst (uint8_t port_id, uint16_t queue_id, struct rte_mbuf **rx_pkts, const uint16_t nb_pkts)
static uint32_t	rte_eth_rx_queue_count (uint8_t port_id, uint16_t queue_id)
static int	rte_eth_rx_descriptor_done (uint8_t port_id, uint16_t queue_id, uint16_t offset)
static uint16_t	rte_eth_tx_burst (uint8_t port_id, uint16_t queue_id, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
int	rte_eth_dev_fdir_add_signature_filter (uint8_t port_id, struct rte_fdir_filter *fdir_filter, uint8_t rx_queue)
int	rte_eth_dev_fdir_update_signature_filter (uint8_t port_id, struct rte_fdir_filter *fdir_ftr, uint8_t rx_queue)
int	rte_eth_dev_fdir_remove_signature_filter (uint8_t port_id, struct rte_fdir_filter *fdir_ftr)
int	rte_eth_dev_fdir_get_infos (uint8_t port_id, struct rte_eth_fdir *fdir)
int	rte_eth_dev_fdir_add_perfect_filter (uint8_t port_id, struct rte_fdir_filter *fdir_filter, uint16_t soft_id, uint8_t rx_queue, uint8_t drop)
int	rte_eth_dev_fdir_update_perfect_filter (uint8_t port_id, struct rte_fdir_filter *fdir_filter, uint16_t soft_id, uint8_t rx_queue, uint8_t drop)
int	rte_eth_dev_fdir_remove_perfect_filter (uint8_t port_id, struct rte_fdir_filter *fdir_filter, uint16_t soft_id)
int	rte_eth_dev_fdir_set_masks (uint8_t port_id, struct rte_fdir_masks *fdir_mask)
int	rte_eth_dev_callback_register (uint8_t port_id, enum rte_eth_event_type event, rte_eth_dev_cb_fn cb_fn, void *cb_arg)
int	rte_eth_dev_callback_unregister (uint8_t port_id, enum rte_eth_event_type event, rte_eth_dev_cb_fn cb_fn, void *cb_arg)
int	rte_eth_dev_rx_intr_enable (uint8_t port_id, uint16_t queue_id)
int	rte_eth_dev_rx_intr_disable (uint8_t port_id, uint16_t queue_id)
int	rte_eth_dev_rx_intr_ctl (uint8_t port_id, int epfd, int op, void *data)
int	rte_eth_dev_rx_intr_ctl_q (uint8_t port_id, uint16_t queue_id, int epfd, int op, void *data)
int	rte_eth_led_on (uint8_t port_id)
int	rte_eth_led_off (uint8_t port_id)
int	rte_eth_dev_flow_ctrl_get (uint8_t port_id, struct rte_eth_fc_conf *fc_conf)
int	rte_eth_dev_flow_ctrl_set (uint8_t port_id, struct rte_eth_fc_conf *fc_conf)
int	rte_eth_dev_priority_flow_ctrl_set (uint8_t port_id, struct rte_eth_pfc_conf *pfc_conf)
int	rte_eth_dev_mac_addr_add (uint8_t port, struct ether_addr *mac_addr, uint32_t pool)
int	rte_eth_dev_mac_addr_remove (uint8_t port, struct ether_addr *mac_addr)
int	rte_eth_dev_default_mac_addr_set (uint8_t port, struct ether_addr *mac_addr)
int	rte_eth_dev_rss_reta_update (uint8_t port, struct rte_eth_rss_reta_entry64 *reta_conf, uint16_t reta_size)
int	rte_eth_dev_rss_reta_query (uint8_t port, struct rte_eth_rss_reta_entry64 *reta_conf, uint16_t reta_size)
int	rte_eth_dev_uc_hash_table_set (uint8_t port, struct ether_addr *addr, uint8_t on)
int	rte_eth_dev_uc_all_hash_table_set (uint8_t port, uint8_t on)
int	rte_eth_dev_set_vf_rxmode (uint8_t port, uint16_t vf, uint16_t rx_mode, uint8_t on)
int	rte_eth_dev_set_vf_tx (uint8_t port, uint16_t vf, uint8_t on)
int	rte_eth_dev_set_vf_rx (uint8_t port, uint16_t vf, uint8_t on)
int	rte_eth_dev_set_vf_vlan_filter (uint8_t port, uint16_t vlan_id, uint64_t vf_mask, uint8_t vlan_on)
int	rte_eth_mirror_rule_set (uint8_t port_id, struct rte_eth_mirror_conf *mirror_conf, uint8_t rule_id, uint8_t on)
int	rte_eth_mirror_rule_reset (uint8_t port_id, uint8_t rule_id)
int	rte_eth_set_queue_rate_limit (uint8_t port_id, uint16_t queue_idx, uint16_t tx_rate)
int	rte_eth_set_vf_rate_limit (uint8_t port_id, uint16_t vf, uint16_t tx_rate, uint64_t q_msk)
int	rte_eth_dev_bypass_init (uint8_t port)
int	rte_eth_dev_bypass_state_show (uint8_t port, uint32_t *state)
int	rte_eth_dev_bypass_state_set (uint8_t port, uint32_t *new_state)
int	rte_eth_dev_bypass_event_show (uint8_t port, uint32_t event, uint32_t *state)
int	rte_eth_dev_bypass_event_store (uint8_t port, uint32_t event, uint32_t state)
int	rte_eth_dev_wd_timeout_store (uint8_t port, uint32_t timeout)
int	rte_eth_dev_bypass_ver_show (uint8_t port, uint32_t *ver)
int	rte_eth_dev_bypass_wd_timeout_show (uint8_t port, uint32_t *wd_timeout)
int	rte_eth_dev_bypass_wd_reset (uint8_t port)
int	rte_eth_dev_rss_hash_update (uint8_t port_id, struct rte_eth_rss_conf *rss_conf)
int	rte_eth_dev_rss_hash_conf_get (uint8_t port_id, struct rte_eth_rss_conf *rss_conf)
int	rte_eth_dev_udp_tunnel_add (uint8_t port_id, struct rte_eth_udp_tunnel *tunnel_udp)
int	rte_eth_dev_udp_tunnel_delete (uint8_t port_id, struct rte_eth_udp_tunnel *tunnel_udp)
int	rte_eth_dev_filter_supported (uint8_t port_id, enum rte_filter_type filter_type)
int	rte_eth_dev_filter_ctrl (uint8_t port_id, enum rte_filter_type filter_type, enum rte_filter_op filter_op, void *arg)
void *	rte_eth_add_rx_callback (uint8_t port_id, uint16_t queue_id, rte_rx_callback_fn fn, void *user_param)
void *	rte_eth_add_tx_callback (uint8_t port_id, uint16_t queue_id, rte_tx_callback_fn fn, void *user_param)
int	rte_eth_remove_rx_callback (uint8_t port_id, uint16_t queue_id, struct rte_eth_rxtx_callback *user_cb)
int	rte_eth_remove_tx_callback (uint8_t port_id, uint16_t queue_id, struct rte_eth_rxtx_callback *user_cb)
int	rte_eth_dev_get_reg_length (uint8_t port_id)
int	rte_eth_dev_get_reg_info (uint8_t port_id, struct rte_dev_reg_info *info)
int	rte_eth_dev_get_eeprom_length (uint8_t port_id)
int	rte_eth_dev_get_eeprom (uint8_t port_id, struct rte_dev_eeprom_info *info)
int	rte_eth_dev_set_eeprom (uint8_t port_id, struct rte_dev_eeprom_info *info)
int	rte_eth_dev_set_mc_addr_list (uint8_t port_id, struct ether_addr *mc_addr_set, uint32_t nb_mc_addr)
int	rte_eth_timesync_enable (uint8_t port_id)
int	rte_eth_timesync_disable (uint8_t port_id)
int	rte_eth_timesync_read_rx_timestamp (uint8_t port_id, struct timespec *timestamp, uint32_t flags)
int	rte_eth_timesync_read_tx_timestamp (uint8_t port_id, struct timespec *timestamp)

Detailed Description

RTE Ethernet Device API

The Ethernet Device API is composed of two parts:

The application-oriented Ethernet API that includes functions to setup an Ethernet device (configure it, setup its RX and TX queues and start it), to get its MAC address, the speed and the status of its physical link, to receive and to transmit packets, and so on.

The driver-oriented Ethernet API that exports a function allowing an Ethernet Poll Mode Driver (PMD) to simultaneously register itself as an Ethernet device driver and as a PCI driver for a set of matching PCI [Ethernet] devices classes.

By default, all the functions of the Ethernet Device API exported by a PMD are lock-free functions which assume to not be invoked in parallel on different logical cores to work on the same target object. For instance, the receive function of a PMD cannot be invoked in parallel on two logical cores to poll the same RX queue [of the same port]. Of course, this function can be invoked in parallel by different logical cores on different RX queues. It is the responsibility of the upper level application to enforce this rule.

If needed, parallel accesses by multiple logical cores to shared queues shall be explicitly protected by dedicated inline lock-aware functions built on top of their corresponding lock-free functions of the PMD API.

In all functions of the Ethernet API, the Ethernet device is designated by an integer >= 0 named the device port identifier.

At the Ethernet driver level, Ethernet devices are represented by a generic data structure of type rte_eth_dev.

Ethernet devices are dynamically registered during the PCI probing phase performed at EAL initialization time. When an Ethernet device is being probed, an rte_eth_dev structure and a new port identifier are allocated for that device. Then, the eth_dev_init() function supplied by the Ethernet driver matching the probed PCI device is invoked to properly initialize the device.

The role of the device init function consists of resetting the hardware, checking access to Non-volatile Memory (NVM), reading the MAC address from NVM etc.

If the device init operation is successful, the correspondence between the port identifier assigned to the new device and its associated rte_eth_dev structure is effectively registered. Otherwise, both the rte_eth_dev structure and the port identifier are freed.

The functions exported by the application Ethernet API to setup a device designated by its port identifier must be invoked in the following order:

Then, the network application can invoke, in any order, the functions exported by the Ethernet API to get the MAC address of a given device, to get the speed and the status of a device physical link, to receive/transmit [burst of] packets, and so on.

If the application wants to change the configuration (i.e. call rte_eth_dev_configure(), rte_eth_tx_queue_setup(), or rte_eth_rx_queue_setup()), it must call rte_eth_dev_stop() first to stop the device and then do the reconfiguration before calling rte_eth_dev_start() again. The tramsit and receive functions should not be invoked when the device is stopped.

Please note that some configuration is not stored between calls to rte_eth_dev_stop()/rte_eth_dev_start(). The following configuration will be retained:

- flow control settings
- receive mode configuration (promiscuous mode, hardware checksum mode,
  RSS/VMDQ settings etc.)
- VLAN filtering configuration
- MAC addresses supplied to MAC address array
- flow director filtering mode (but not filtering rules)
- NIC queue statistics mappings

Any other configuration will not be stored and will need to be re-entered after a call to rte_eth_dev_start().

Finally, a network application can close an Ethernet device by invoking the rte_eth_dev_close() function.

Each function of the application Ethernet API invokes a specific function of the PMD that controls the target device designated by its port identifier. For this purpose, all device-specific functions of an Ethernet driver are supplied through a set of pointers contained in a generic structure of type eth_dev_ops. The address of the eth_dev_ops structure is stored in the rte_eth_dev structure by the device init function of the Ethernet driver, which is invoked during the PCI probing phase, as explained earlier.

In other words, each function of the Ethernet API simply retrieves the rte_eth_dev structure associated with the device port identifier and performs an indirect invocation of the corresponding driver function supplied in the eth_dev_ops structure of the rte_eth_dev structure.

For performance reasons, the address of the burst-oriented RX and TX functions of the Ethernet driver are not contained in the eth_dev_ops structure. Instead, they are directly stored at the beginning of the rte_eth_dev structure to avoid an extra indirect memory access during their invocation.

RTE ethernet device drivers do not use interrupts for transmitting or receiving. Instead, Ethernet drivers export Poll-Mode receive and transmit functions to applications. Both receive and transmit functions are packet-burst oriented to minimize their cost per packet through the following optimizations:

Sharing among multiple packets the incompressible cost of the invocation of receive/transmit functions.

Enabling receive/transmit functions to take advantage of burst-oriented hardware features (L1 cache, prefetch instructions, NIC head/tail registers) to minimize the number of CPU cycles per packet, for instance, by avoiding useless read memory accesses to ring descriptors, or by systematically using arrays of pointers that exactly fit L1 cache line boundaries and sizes.

The burst-oriented receive function does not provide any error notification, to avoid the corresponding overhead. As a hint, the upper-level application might check the status of the device link once being systematically returned a 0 value by the receive function of the driver for a given number of tries.

Definition in file rte_ethdev.h.

Macro Definition Documentation

#define ETH_LINK_SPEED_AUTONEG 0

Auto-negotiate link speed.

Definition at line 249 of file rte_ethdev.h.

#define ETH_LINK_SPEED_10 10

10 megabits/second.

Definition at line 250 of file rte_ethdev.h.

#define ETH_LINK_SPEED_100 100

100 megabits/second.

Definition at line 251 of file rte_ethdev.h.

#define ETH_LINK_SPEED_1000 1000

1 gigabits/second.

Definition at line 252 of file rte_ethdev.h.

#define ETH_LINK_SPEED_10000 10000

10 gigabits/second.

Definition at line 253 of file rte_ethdev.h.

#define ETH_LINK_SPEED_10G 10000

alias of 10 gigabits/second.

Definition at line 254 of file rte_ethdev.h.

#define ETH_LINK_SPEED_20G 20000

20 gigabits/second.

Definition at line 255 of file rte_ethdev.h.

#define ETH_LINK_SPEED_40G 40000

40 gigabits/second.

Definition at line 256 of file rte_ethdev.h.

#define ETH_LINK_AUTONEG_DUPLEX 0

Auto-negotiate duplex.

Definition at line 258 of file rte_ethdev.h.

#define ETH_LINK_HALF_DUPLEX 1

Half-duplex connection.

Definition at line 259 of file rte_ethdev.h.

#define ETH_LINK_FULL_DUPLEX 2

Full-duplex connection.

Definition at line 260 of file rte_ethdev.h.

#define ETH_MQ_RX_RSS_FLAG 0x1

Simple flags are used for rte_eth_conf.rxmode.mq_mode.

Definition at line 275 of file rte_ethdev.h.

#define ETH_RSS ETH_MQ_RX_RSS

for rx mq mode backward compatible

Definition at line 308 of file rte_ethdev.h.

#define ETH_DCB_NONE ETH_MQ_TX_NONE

for tx mq mode backward compatible

Definition at line 326 of file rte_ethdev.h.

#define ETH_RSS_SCTP

Value:

( \
        ETH_RSS_NONFRAG_IPV4_SCTP | \
        ETH_RSS_NONFRAG_IPV6_SCTP)

Mask of valid RSS hash protocols

Definition at line 414 of file rte_ethdev.h.

#define ETH_VMDQ_MAX_VLAN_FILTERS 64

Maximum nb. of VMDQ vlan filters.

Definition at line 448 of file rte_ethdev.h.

#define ETH_DCB_NUM_USER_PRIORITIES 8

Maximum nb. of DCB priorities.

Definition at line 449 of file rte_ethdev.h.

#define ETH_VMDQ_DCB_NUM_QUEUES 128

Maximum nb. of VMDQ DCB queues.

Definition at line 450 of file rte_ethdev.h.

#define ETH_DCB_NUM_QUEUES 128

Maximum nb. of DCB queues.

Definition at line 451 of file rte_ethdev.h.

#define ETH_DCB_PG_SUPPORT 0x00000001

Priority Group(ETS) support.

Definition at line 454 of file rte_ethdev.h.

#define ETH_DCB_PFC_SUPPORT 0x00000002

Priority Flow Control support.

Definition at line 455 of file rte_ethdev.h.

#define ETH_VLAN_STRIP_OFFLOAD 0x0001

VLAN Strip On/Off

Definition at line 458 of file rte_ethdev.h.

#define ETH_VLAN_FILTER_OFFLOAD 0x0002

VLAN Filter On/Off

Definition at line 459 of file rte_ethdev.h.

#define ETH_VLAN_EXTEND_OFFLOAD 0x0004

VLAN Extend On/Off

Definition at line 460 of file rte_ethdev.h.

#define ETH_VLAN_STRIP_MASK 0x0001

VLAN Strip setting mask

Definition at line 463 of file rte_ethdev.h.

#define ETH_VLAN_FILTER_MASK 0x0002

VLAN Filter setting mask

Definition at line 464 of file rte_ethdev.h.

#define ETH_VLAN_EXTEND_MASK 0x0004

VLAN Extend setting mask

Definition at line 465 of file rte_ethdev.h.

#define ETH_VLAN_ID_MAX 0x0FFF

VLAN ID is in lower 12 bits

Definition at line 466 of file rte_ethdev.h.

#define ETH_NUM_RECEIVE_MAC_ADDR 128

Maximum nb. of receive mac addr.

Definition at line 469 of file rte_ethdev.h.

#define ETH_VMDQ_NUM_UC_HASH_ARRAY 128

Maximum nb. of UC hash array.

Definition at line 472 of file rte_ethdev.h.

#define ETH_VMDQ_ACCEPT_UNTAG 0x0001

accept untagged packets.

Definition at line 475 of file rte_ethdev.h.

#define ETH_VMDQ_ACCEPT_HASH_MC 0x0002

accept packets in multicast table .

Definition at line 476 of file rte_ethdev.h.

#define ETH_VMDQ_ACCEPT_HASH_UC 0x0004

accept packets in unicast table.

Definition at line 477 of file rte_ethdev.h.

#define ETH_VMDQ_ACCEPT_BROADCAST 0x0008

accept broadcast packets.

Definition at line 478 of file rte_ethdev.h.

#define ETH_VMDQ_ACCEPT_MULTICAST 0x0010

multicast promiscuous.

Definition at line 479 of file rte_ethdev.h.

#define ETH_MIRROR_MAX_VLANS 64

Maximum nb. of vlan per mirror rule

Definition at line 482 of file rte_ethdev.h.

#define ETH_MIRROR_VIRTUAL_POOL_UP 0x01

Virtual Pool uplink Mirroring.

Definition at line 484 of file rte_ethdev.h.

#define ETH_MIRROR_UPLINK_PORT 0x02

Uplink Port Mirroring.

Definition at line 485 of file rte_ethdev.h.

#define ETH_MIRROR_DOWNLINK_PORT 0x04

Downlink Port Mirroring.

Definition at line 486 of file rte_ethdev.h.

#define ETH_MIRROR_VLAN 0x08

VLAN Mirroring.

Definition at line 487 of file rte_ethdev.h.

#define ETH_MIRROR_VIRTUAL_POOL_DOWN 0x10

Virtual Pool downlink Mirroring.

Definition at line 488 of file rte_ethdev.h.

#define ETH_TXQ_FLAGS_NOMULTSEGS 0x0001

nb_segs=1 for all mbufs

Definition at line 629 of file rte_ethdev.h.

#define ETH_TXQ_FLAGS_NOREFCOUNT 0x0002

refcnt can be ignored

Definition at line 630 of file rte_ethdev.h.

#define ETH_TXQ_FLAGS_NOMULTMEMP 0x0004

all bufs come from same mempool

Definition at line 631 of file rte_ethdev.h.

#define ETH_TXQ_FLAGS_NOVLANOFFL 0x0100

disable VLAN offload

Definition at line 632 of file rte_ethdev.h.

#define ETH_TXQ_FLAGS_NOXSUMSCTP 0x0200

disable SCTP checksum offload

Definition at line 633 of file rte_ethdev.h.

#define ETH_TXQ_FLAGS_NOXSUMUDP 0x0400

disable UDP checksum offload

Definition at line 634 of file rte_ethdev.h.

#define ETH_TXQ_FLAGS_NOXSUMTCP 0x0800

disable TCP checksum offload

Definition at line 635 of file rte_ethdev.h.

#define DEV_RX_OFFLOAD_VLAN_STRIP 0x00000001

A structure used to retrieve the contextual information of an Ethernet device, such as the controlling driver of the device, its PCI context, etc... RX offload capabilities of a device.

Definition at line 904 of file rte_ethdev.h.

#define DEV_TX_OFFLOAD_VLAN_INSERT 0x00000001

TX offload capabilities of a device.

Definition at line 914 of file rte_ethdev.h.

#define DEV_TX_OFFLOAD_OUTER_IPV4_CKSUM 0x00000080

Used for tunneling packet.

Definition at line 921 of file rte_ethdev.h.

#define RTE_ETH_XSTATS_NAME_SIZE 64

Maximum name length for extended statistics counters

Definition at line 953 of file rte_ethdev.h.

Typedef Documentation

typedef uint16_t(* rte_rx_callback_fn)(uint8_t port, uint16_t queue, struct rte_mbuf *pkts[], uint16_t nb_pkts, uint16_t max_pkts, void *user_param)

Function type used for RX packet processing packet callbacks.

The callback function is called on RX with a burst of packets that have been received on the given port and queue.

Parameters

port	The Ethernet port on which RX is being performed.
queue	The queue on the Ethernet port which is being used to receive the packets.
pkts	The burst of packets that have just been received.
nb_pkts	The number of packets in the burst pointed to by "pkts".
max_pkts	The max number of packets that can be stored in the "pkts" array.
user_param	The arbitrary user parameter passed in by the application when the callback was originally configured.

Returns: The number of packets returned to the user.

Definition at line 1507 of file rte_ethdev.h.

typedef uint16_t(* rte_tx_callback_fn)(uint8_t port, uint16_t queue, struct rte_mbuf *pkts[], uint16_t nb_pkts, void *user_param)

Function type used for TX packet processing packet callbacks.

The callback function is called on TX with a burst of packets immediately before the packets are put onto the hardware queue for transmission.

Parameters

port	The Ethernet port on which TX is being performed.
queue	The queue on the Ethernet port which is being used to transmit the packets.
pkts	The burst of packets that are about to be transmitted.
nb_pkts	The number of packets in the burst pointed to by "pkts".
user_param	The arbitrary user parameter passed in by the application when the callback was originally configured.

Returns: The number of packets to be written to the NIC.

Definition at line 1531 of file rte_ethdev.h.

typedef void(* rte_eth_dev_cb_fn)(uint8_t port_id, enum rte_eth_event_type event, void *cb_arg)

user application callback to be registered for interrupts

Definition at line 2914 of file rte_ethdev.h.

Enumeration Type Documentation

enum rte_eth_rx_mq_mode

A set of values to identify what method is to be used to route packets to multiple queues.

Enumerator:

ETH_MQ_RX_NONE	None of DCB,RSS or VMDQ mode
ETH_MQ_RX_RSS	For RX side, only RSS is on
ETH_MQ_RX_DCB	For RX side,only DCB is on.
ETH_MQ_RX_DCB_RSS	Both DCB and RSS enable
ETH_MQ_RX_VMDQ_ONLY	Only VMDQ, no RSS nor DCB
ETH_MQ_RX_VMDQ_RSS	RSS mode with VMDQ
ETH_MQ_RX_VMDQ_DCB	Use VMDQ+DCB to route traffic to queues
ETH_MQ_RX_VMDQ_DCB_RSS	Enable both VMDQ and DCB in VMDq

Definition at line 283 of file rte_ethdev.h.

enum rte_eth_tx_mq_mode

A set of values to identify what method is to be used to transmit packets using multi-TCs.

Enumerator:

ETH_MQ_TX_NONE	It is in neither DCB nor VT mode.
ETH_MQ_TX_DCB	For TX side,only DCB is on.
ETH_MQ_TX_VMDQ_DCB	For TX side,both DCB and VT is on.
ETH_MQ_TX_VMDQ_ONLY	Only VT on, no DCB

Definition at line 316 of file rte_ethdev.h.

enum rte_eth_nb_tcs

This enum indicates the possible number of traffic classes in DCB configratioins

Enumerator:

ETH_4_TCS	4 TCs with DCB.
ETH_8_TCS	8 TCs with DCB.

Definition at line 527 of file rte_ethdev.h.

enum rte_eth_nb_pools

This enum indicates the possible number of queue pools in VMDQ configurations.

Enumerator:

ETH_8_POOLS	8 VMDq pools.
ETH_16_POOLS	16 VMDq pools.
ETH_32_POOLS	32 VMDq pools.
ETH_64_POOLS	64 VMDq pools.

Definition at line 536 of file rte_ethdev.h.

enum rte_eth_fc_mode

This enum indicates the flow control mode

Enumerator:

RTE_FC_NONE	Disable flow control.
RTE_FC_RX_PAUSE	RX pause frame, enable flowctrl on TX side.
RTE_FC_TX_PAUSE	TX pause frame, enable flowctrl on RX side.
RTE_FC_FULL	Enable flow control on both side.

Definition at line 658 of file rte_ethdev.h.

enum rte_fdir_pballoc_type

Memory space that can be configured to store Flow Director filters in the board memory.

Enumerator:

RTE_FDIR_PBALLOC_64K	64k.
RTE_FDIR_PBALLOC_128K	128k.
RTE_FDIR_PBALLOC_256K	256k.

Definition at line 694 of file rte_ethdev.h.

enum rte_fdir_status_mode

Select report mode of FDIR hash information in RX descriptors.

Enumerator:

RTE_FDIR_NO_REPORT_STATUS	Never report FDIR hash.
RTE_FDIR_REPORT_STATUS	Only report FDIR hash for matching pkts.
RTE_FDIR_REPORT_STATUS_ALWAYS	Always report FDIR hash.

Definition at line 703 of file rte_ethdev.h.

enum rte_l4type

Possible l4type of FDIR filters.

Enumerator:

RTE_FDIR_L4TYPE_NONE	None.
RTE_FDIR_L4TYPE_UDP	UDP.
RTE_FDIR_L4TYPE_TCP	TCP.
RTE_FDIR_L4TYPE_SCTP	SCTP.

Definition at line 737 of file rte_ethdev.h.

enum rte_iptype

Select IPv4 or IPv6 FDIR filters.

Enumerator:

RTE_FDIR_IPTYPE_IPV4	IPv4.
RTE_FDIR_IPTYPE_IPV6	IPv6.

Definition at line 747 of file rte_ethdev.h.

enum rte_eth_dev_type

The eth device type.

Enumerator:

RTE_ETH_DEV_UNKNOWN	unknown device type
RTE_ETH_DEV_PCI	Physical function and Virtual function of PCI devices
RTE_ETH_DEV_VIRTUAL	non hardware device
RTE_ETH_DEV_MAX	max value of this enum

Definition at line 1551 of file rte_ethdev.h.

enum rte_eth_event_type

The eth device event type for interrupt, and maybe others in the future.

Enumerator:

RTE_ETH_EVENT_UNKNOWN	unknown event type
RTE_ETH_EVENT_INTR_LSC	lsc interrupt event
RTE_ETH_EVENT_MAX	max value of this enum

Definition at line 2908 of file rte_ethdev.h.

Function Documentation

uint8_t rte_eth_dev_count ( void )

Get the total number of Ethernet devices that have been successfully initialized by the [matching] Ethernet driver during the PCI probing phase. All devices whose port identifier is in the range [0, rte_eth_dev_count() - 1] can be operated on by network applications immediately after invoking rte_eal_init(). If the application unplugs a port using hotplug function, The enabled port numbers may be noncontiguous. In the case, the applications need to manage enabled port by themselves.

Returns

The total number of usable Ethernet devices.

int rte_eth_dev_attach	(	const char *	devargs,
		uint8_t *	port_id
	)

Attach a new Ethernet device specified by aruguments.

Parameters

devargs	A pointer to a strings array describing the new device to be attached. The strings should be a pci address like '0000:01:00.0' or virtual device name like 'eth_pcap0'.
port_id	A pointer to a port identifier actually attached.

Returns: 0 on success and port_id is filled, negative on error

int rte_eth_dev_detach	(	uint8_t	port_id,
		char *	devname
	)

Detach a Ethernet device specified by port identifier. This function must be called when the device is in the closed state.

Parameters

port_id	The port identifier of the device to detach.
devname	A pointer to a device name actually detached.

Returns: 0 on success and devname is filled, negative on error

int rte_eth_dev_configure	(	uint8_t	port_id,
		uint16_t	nb_rx_queue,
		uint16_t	nb_tx_queue,
		const struct rte_eth_conf *	eth_conf
	)

Configure an Ethernet device. This function must be invoked first before any other function in the Ethernet API. This function can also be re-invoked when a device is in the stopped state.

Parameters

port_id	The port identifier of the Ethernet device to configure.
nb_rx_queue	The number of receive queues to set up for the Ethernet device.
nb_tx_queue	The number of transmit queues to set up for the Ethernet device.
eth_conf	The pointer to the configuration data to be used for the Ethernet device. The rte_eth_conf structure includes: the hardware offload features to activate, with dedicated fields for each statically configurable offload hardware feature provided by Ethernet devices, such as IP checksum or VLAN tag stripping for example. the Receive Side Scaling (RSS) configuration when using multiple RX queues per port.

Embedding all configuration information in a single data structure is the more flexible method that allows the addition of new features without changing the syntax of the API.

Returns

0: Success, device configured.
<0: Error code returned by the driver configuration function.

int rte_eth_rx_queue_setup	(	uint8_t	port_id,
		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
	)

Allocate and set up a receive queue for an Ethernet device.

The function allocates a contiguous block of memory for nb_rx_desc receive descriptors from a memory zone associated with socket_id and initializes each receive descriptor with a network buffer allocated from the memory pool mb_pool.

Parameters

port_id	The port identifier of the Ethernet device.
rx_queue_id	The index of the receive queue to set up. The value must be in the range [0, nb_rx_queue - 1] previously supplied to rte_eth_dev_configure().
nb_rx_desc	The number of receive descriptors to allocate for the receive ring.
socket_id	The socket_id argument is the socket identifier in case of NUMA. The value can be SOCKET_ID_ANY if there is no NUMA constraint for the DMA memory allocated for the receive descriptors of the ring.
rx_conf	The pointer to the configuration data to be used for the receive queue. NULL value is allowed, in which case default RX configuration will be used. The rx_conf structure contains an rx_thresh structure with the values of the Prefetch, Host, and Write-Back threshold registers of the receive ring.
mb_pool	The pointer to the memory pool from which to allocate rte_mbuf network memory buffers to populate each descriptor of the receive ring.

Returns

0: Success, receive queue correctly set up.
-EINVAL: The size of network buffers which can be allocated from the memory pool does not fit the various buffer sizes allowed by the device controller.
-ENOMEM: Unable to allocate the receive ring descriptors or to allocate network memory buffers from the memory pool when initializing receive descriptors.

int rte_eth_tx_queue_setup	(	uint8_t	port_id,
		uint16_t	tx_queue_id,
		uint16_t	nb_tx_desc,
		unsigned int	socket_id,
		const struct rte_eth_txconf *	tx_conf
	)

Allocate and set up a transmit queue for an Ethernet device.

Parameters

port_id	The port identifier of the Ethernet device.
tx_queue_id	The index of the transmit queue to set up. The value must be in the range [0, nb_tx_queue - 1] previously supplied to rte_eth_dev_configure().
nb_tx_desc	The number of transmit descriptors to allocate for the transmit ring.
socket_id	The socket_id argument is the socket identifier in case of NUMA. Its value can be SOCKET_ID_ANY if there is no NUMA constraint for the DMA memory allocated for the transmit descriptors of the ring.
tx_conf	The pointer to the configuration data to be used for the transmit queue. NULL value is allowed, in which case default RX configuration will be used. The tx_conf structure contains the following data: The tx_thresh structure with the values of the Prefetch, Host, and Write-Back threshold registers of the transmit ring. When setting Write-Back threshold to the value greater then zero, tx_rs_thresh value should be explicitly set to one. The tx_free_thresh value indicates the [minimum] number of network buffers that must be pending in the transmit ring to trigger their [implicit] freeing by the driver transmit function. The tx_rs_thresh value indicates the [minimum] number of transmit descriptors that must be pending in the transmit ring before setting the RS bit on a descriptor by the driver transmit function. The tx_rs_thresh value should be less or equal then tx_free_thresh value, and both of them should be less then nb_tx_desc - 3. The txq_flags member contains flags to pass to the TX queue setup function to configure the behavior of the TX queue. This should be set to 0 if no special configuration is required. Note that setting tx_free_thresh or tx_rs_thresh value to 0 forces the transmit function to use default values.

Returns

0: Success, the transmit queue is correctly set up.
-ENOMEM: Unable to allocate the transmit ring descriptors.

int rte_eth_dev_start ( uint8_t port_id )

Start an Ethernet device.

The device start step is the last one and consists of setting the configured offload features and in starting the transmit and the receive units of the device. On success, all basic functions exported by the Ethernet API (link status, receive/transmit, and so on) can be invoked.

Parameters

port_id The port identifier of the Ethernet device.

Returns

0: Success, Ethernet device started.
<0: Error code of the driver device start function.

void rte_eth_dev_stop ( uint8_t port_id )

Stop an Ethernet device. The device can be restarted with a call to rte_eth_dev_start()

Parameters

port_id The port identifier of the Ethernet device.

int rte_eth_dev_set_link_up ( uint8_t port_id )

Link up an Ethernet device.

Set device link up will re-enable the device rx/tx functionality after it is previously set device linked down.

Parameters

port_id The port identifier of the Ethernet device.

Returns

0: Success, Ethernet device linked up.
<0: Error code of the driver device link up function.

int rte_eth_dev_set_link_down ( uint8_t port_id )

Link down an Ethernet device. The device rx/tx functionality will be disabled if success, and it can be re-enabled with a call to rte_eth_dev_set_link_up()

Parameters

port_id The port identifier of the Ethernet device.

void rte_eth_dev_close ( uint8_t port_id )

Close a stopped Ethernet device. The device cannot be restarted! The function frees all resources except for needed by the closed state. To free these resources, call rte_eth_dev_detach().

Parameters

port_id The port identifier of the Ethernet device.

void rte_eth_promiscuous_enable ( uint8_t port_id )

Enable receipt in promiscuous mode for an Ethernet device.

Parameters

port_id The port identifier of the Ethernet device.

void rte_eth_promiscuous_disable ( uint8_t port_id )

Disable receipt in promiscuous mode for an Ethernet device.

Parameters

port_id The port identifier of the Ethernet device.

int rte_eth_promiscuous_get ( uint8_t port_id )

Return the value of promiscuous mode for an Ethernet device.

Parameters

port_id The port identifier of the Ethernet device.

Returns

(1) if promiscuous is enabled
(0) if promiscuous is disabled.
(-1) on error

void rte_eth_allmulticast_enable ( uint8_t port_id )

Enable the receipt of any multicast frame by an Ethernet device.

Parameters

port_id The port identifier of the Ethernet device.

void rte_eth_allmulticast_disable ( uint8_t port_id )

Disable the receipt of all multicast frames by an Ethernet device.

Parameters

port_id The port identifier of the Ethernet device.

int rte_eth_allmulticast_get ( uint8_t port_id )

Return the value of allmulticast mode for an Ethernet device.

Parameters

port_id The port identifier of the Ethernet device.

Returns

(1) if allmulticast is enabled
(0) if allmulticast is disabled.
(-1) on error

void rte_eth_link_get	(	uint8_t	port_id,
		struct rte_eth_link *	link
	)

Retrieve the status (ON/OFF), the speed (in Mbps) and the mode (HALF-DUPLEX or FULL-DUPLEX) of the physical link of an Ethernet device. It might need to wait up to 9 seconds in it.

Parameters

port_id	The port identifier of the Ethernet device.
link	A pointer to an rte_eth_link structure to be filled with the status, the speed and the mode of the Ethernet device link.

void rte_eth_link_get_nowait	(	uint8_t	port_id,
		struct rte_eth_link *	link
	)

Retrieve the status (ON/OFF), the speed (in Mbps) and the mode (HALF-DUPLEX or FULL-DUPLEX) of the physical link of an Ethernet device. It is a no-wait version of rte_eth_link_get().

Parameters

port_id	The port identifier of the Ethernet device.
link	A pointer to an rte_eth_link structure to be filled with the status, the speed and the mode of the Ethernet device link.

int rte_eth_stats_get	(	uint8_t	port_id,
		struct rte_eth_stats *	stats
	)

Retrieve the general I/O statistics of an Ethernet device.

Parameters

port_id The port identifier of the Ethernet device.

stats

A pointer to a structure of type rte_eth_stats to be filled with the values of device counters for the following set of statistics:

ipackets with the total of successfully received packets.
opackets with the total of successfully transmitted packets.
ibytes with the total of successfully received bytes.
obytes with the total of successfully transmitted bytes.
ierrors with the total of erroneous received packets.
oerrors with the total of failed transmitted packets.

Returns: Zero if successful. Non-zero otherwise.

void rte_eth_stats_reset ( uint8_t port_id )

Reset the general I/O statistics of an Ethernet device.

Parameters

port_id The port identifier of the Ethernet device.

int rte_eth_xstats_get	(	uint8_t	port_id,
		struct rte_eth_xstats *	xstats,
		unsigned	n
	)

Retrieve extended statistics of an Ethernet device.

Parameters

port_id	The port identifier of the Ethernet device.
xstats	A pointer to a table of structure of type rte_eth_xstats to be filled with device statistics names and values. This parameter can be set to NULL if n is 0.
n	The size of the stats table, which should be large enough to store all the statistics of the device.

Returns

positive value lower or equal to n: success. The return value is the number of entries filled in the stats table.
positive value higher than n: error, the given statistics table is too small. The return value corresponds to the size that should be given to succeed. The entries in the table are not valid and shall not be used by the caller.
negative value on error (invalid port id)

void rte_eth_xstats_reset ( uint8_t port_id )

Reset extended statistics of an Ethernet device.

Parameters

port_id The port identifier of the Ethernet device.

int rte_eth_dev_set_tx_queue_stats_mapping	(	uint8_t	port_id,
		uint16_t	tx_queue_id,
		uint8_t	stat_idx
	)

Set a mapping for the specified transmit queue to the specified per-queue statistics counter.

Parameters

port_id	The port identifier of the Ethernet device.
tx_queue_id	The index of the transmit queue for which a queue stats mapping is required. The value must be in the range [0, nb_tx_queue - 1] previously supplied to rte_eth_dev_configure().
stat_idx	The per-queue packet statistics functionality number that the transmit queue is to be assigned. The value must be in the range [0, RTE_MAX_ETHPORT_QUEUE_STATS_MAPS - 1].

Returns: Zero if successful. Non-zero otherwise.

int rte_eth_dev_set_rx_queue_stats_mapping	(	uint8_t	port_id,
		uint16_t	rx_queue_id,
		uint8_t	stat_idx
	)

Set a mapping for the specified receive queue to the specified per-queue statistics counter.

Parameters

port_id	The port identifier of the Ethernet device.
rx_queue_id	The index of the receive queue for which a queue stats mapping is required. The value must be in the range [0, nb_rx_queue - 1] previously supplied to rte_eth_dev_configure().
stat_idx	The per-queue packet statistics functionality number that the receive queue is to be assigned. The value must be in the range [0, RTE_MAX_ETHPORT_QUEUE_STATS_MAPS - 1].

Returns: Zero if successful. Non-zero otherwise.

void rte_eth_macaddr_get	(	uint8_t	port_id,
		struct ether_addr *	mac_addr
	)

Retrieve the Ethernet address of an Ethernet device.

Parameters

port_id	The port identifier of the Ethernet device.
mac_addr	A pointer to a structure of type ether_addr to be filled with the Ethernet address of the Ethernet device.

void rte_eth_dev_info_get	(	uint8_t	port_id,
		struct rte_eth_dev_info *	dev_info
	)

Retrieve the contextual information of an Ethernet device.

Parameters

port_id	The port identifier of the Ethernet device.
dev_info	A pointer to a structure of type rte_eth_dev_info to be filled with the contextual information of the Ethernet device.

int rte_eth_dev_get_mtu	(	uint8_t	port_id,
		uint16_t *	mtu
	)

Retrieve the MTU of an Ethernet device.

Parameters

port_id	The port identifier of the Ethernet device.
mtu	A pointer to a uint16_t where the retrieved MTU is to be stored.

Returns

(0) if successful.
(-ENODEV) if port_id invalid.

int rte_eth_dev_set_mtu	(	uint8_t	port_id,
		uint16_t	mtu
	)

Change the MTU of an Ethernet device.

Parameters

port_id	The port identifier of the Ethernet device.
mtu	A uint16_t for the MTU to be applied.

Returns

(0) if successful.
(-ENOTSUP) if operation is not supported.
(-ENODEV) if port_id invalid.
(-EINVAL) if mtu invalid.

int rte_eth_dev_vlan_filter	(	uint8_t	port_id,
		uint16_t	vlan_id,
		int	on
	)

Enable/Disable hardware filtering by an Ethernet device of received VLAN packets tagged with a given VLAN Tag Identifier.

Parameters

port_id	The port identifier of the Ethernet device.
vlan_id	The VLAN Tag Identifier whose filtering must be enabled or disabled.
on	If > 0, enable VLAN filtering of VLAN packets tagged with vlan_id. Otherwise, disable VLAN filtering of VLAN packets tagged with vlan_id.

Returns

(0) if successful.
(-ENOSUP) if hardware-assisted VLAN filtering not configured.
(-ENODEV) if port_id invalid.
(-ENOSYS) if VLAN filtering on port_id disabled.
(-EINVAL) if vlan_id > 4095.

int rte_eth_dev_set_vlan_strip_on_queue	(	uint8_t	port_id,
		uint16_t	rx_queue_id,
		int	on
	)

Enable/Disable hardware VLAN Strip by a rx queue of an Ethernet device. 82599/X540/X550 can support VLAN stripping at the rx queue level

Parameters

port_id	The port identifier of the Ethernet device.
rx_queue_id	The index of the receive queue for which a queue stats mapping is required. The value must be in the range [0, nb_rx_queue - 1] previously supplied to rte_eth_dev_configure().
on	If 1, Enable VLAN Stripping of the receive queue of the Ethernet port. If 0, Disable VLAN Stripping of the receive queue of the Ethernet port.

Returns

(0) if successful.
(-ENOSUP) if hardware-assisted VLAN stripping not configured.
(-ENODEV) if port_id invalid.
(-EINVAL) if rx_queue_id invalid.

int rte_eth_dev_set_vlan_ether_type	(	uint8_t	port_id,
		uint16_t	tag_type
	)

Set the Outer VLAN Ether Type by an Ethernet device, it can be inserted to the VLAN Header. This is a register setup available on some Intel NIC, not but all, please check the data sheet for availability.

Parameters

port_id	The port identifier of the Ethernet device.
tag_type	The Tag Protocol ID

Returns

(0) if successful.
(-ENOSUP) if hardware-assisted VLAN TPID setup is not supported.
(-ENODEV) if port_id invalid.

int rte_eth_dev_set_vlan_offload	(	uint8_t	port_id,
		int	offload_mask
	)

Set VLAN offload configuration on an Ethernet device Enable/Disable Extended VLAN by an Ethernet device, This is a register setup available on some Intel NIC, not but all, please check the data sheet for availability. Enable/Disable VLAN Strip can be done on rx queue for certain NIC, but here the configuration is applied on the port level.

Parameters

port_id	The port identifier of the Ethernet device.
offload_mask	The VLAN Offload bit mask can be mixed use with "OR" ETH_VLAN_STRIP_OFFLOAD ETH_VLAN_FILTER_OFFLOAD ETH_VLAN_EXTEND_OFFLOAD

Returns

(0) if successful.
(-ENOSUP) if hardware-assisted VLAN filtering not configured.
(-ENODEV) if port_id invalid.

int rte_eth_dev_get_vlan_offload ( uint8_t port_id )

Read VLAN Offload configuration from an Ethernet device

Parameters

port_id The port identifier of the Ethernet device.

Returns

(>0) if successful. Bit mask to indicate ETH_VLAN_STRIP_OFFLOAD ETH_VLAN_FILTER_OFFLOAD ETH_VLAN_EXTEND_OFFLOAD
(-ENODEV) if port_id invalid.

int rte_eth_dev_set_vlan_pvid	(	uint8_t	port_id,
		uint16_t	pvid,
		int	on
	)

Set port based TX VLAN insersion on or off.

Parameters

port_id	The port identifier of the Ethernet device.
pvid	Port based TX VLAN identifier togeth with user priority.
on	Turn on or off the port based TX VLAN insertion.

Returns

(0) if successful.
negative if failed.

static uint16_t rte_eth_rx_burst	(	uint8_t	port_id,
		uint16_t	queue_id,
		struct rte_mbuf **	rx_pkts,
		const uint16_t	nb_pkts
	)

inlinestatic

Retrieve a burst of input packets from a receive queue of an Ethernet device. The retrieved packets are stored in rte_mbuf structures whose pointers are supplied in the rx_pkts array.

The rte_eth_rx_burst() function loops, parsing the RX ring of the receive queue, up to nb_pkts packets, and for each completed RX descriptor in the ring, it performs the following operations:

Initialize the rte_mbuf data structure associated with the RX descriptor according to the information provided by the NIC into that RX descriptor.

Store the rte_mbuf data structure into the next entry of the rx_pkts array.

Replenish the RX descriptor with a new rte_mbuf buffer allocated from the memory pool associated with the receive queue at initialization time.

When retrieving an input packet that was scattered by the controller into multiple receive descriptors, the rte_eth_rx_burst() function appends the associated rte_mbuf buffers to the first buffer of the packet.

The rte_eth_rx_burst() function returns the number of packets actually retrieved, which is the number of rte_mbuf data structures effectively supplied into the rx_pkts array. A return value equal to nb_pkts indicates that the RX queue contained at least rx_pkts packets, and this is likely to signify that other received packets remain in the input queue. Applications implementing a "retrieve as much received packets as possible" policy can check this specific case and keep invoking the rte_eth_rx_burst() function until a value less than nb_pkts is returned.

This receive method has the following advantages:

It allows a run-to-completion network stack engine to retrieve and to immediately process received packets in a fast burst-oriented approach, avoiding the overhead of unnecessary intermediate packet queue/dequeue operations.

Conversely, it also allows an asynchronous-oriented processing method to retrieve bursts of received packets and to immediately queue them for further parallel processing by another logical core, for instance. However, instead of having received packets being individually queued by the driver, this approach allows the invoker of the rte_eth_rx_burst() function to queue a burst of retrieved packets at a time and therefore dramatically reduce the cost of enqueue/dequeue operations per packet.

It allows the rte_eth_rx_burst() function of the driver to take advantage of burst-oriented hardware features (CPU cache, prefetch instructions, and so on) to minimize the number of CPU cycles per packet.

To summarize, the proposed receive API enables many burst-oriented optimizations in both synchronous and asynchronous packet processing environments with no overhead in both cases.

The rte_eth_rx_burst() function does not provide any error notification to avoid the corresponding overhead. As a hint, the upper-level application might check the status of the device link once being systematically returned a 0 value for a given number of tries.

Parameters

port_id	The port identifier of the Ethernet device.
queue_id	The index of the receive queue from which to retrieve input packets. The value must be in the range [0, nb_rx_queue - 1] previously supplied to rte_eth_dev_configure().
rx_pkts	The address of an array of pointers to rte_mbuf structures that must be large enough to store nb_pkts pointers in it.
nb_pkts	The maximum number of packets to retrieve.

Returns: The number of packets actually retrieved, which is the number of pointers to rte_mbuf structures effectively supplied to the rx_pkts array.

Definition at line 2524 of file rte_ethdev.h.

static uint32_t rte_eth_rx_queue_count	(	uint8_t	port_id,
		uint16_t	queue_id
	)

inlinestatic

Get the number of used descriptors in a specific queue

Parameters

port_id	The port identifier of the Ethernet device.
queue_id	The queue id on the specific port.

Returns: The number of used descriptors in the specific queue.

Definition at line 2564 of file rte_ethdev.h.

static int rte_eth_rx_descriptor_done	(	uint8_t	port_id,
		uint16_t	queue_id,
		uint16_t	offset
	)

inlinestatic

Check if the DD bit of the specific RX descriptor in the queue has been set

Parameters

port_id	The port identifier of the Ethernet device.
queue_id	The queue id on the specific port.
offset	The offset of the descriptor ID from tail.

Returns

(1) if the specific DD bit is set.
(0) if the specific DD bit is not set.
(-ENODEV) if port_id invalid.

Definition at line 2593 of file rte_ethdev.h.

static uint16_t rte_eth_tx_burst	(	uint8_t	port_id,
		uint16_t	queue_id,
		struct rte_mbuf **	tx_pkts,
		uint16_t	nb_pkts
	)

inlinestatic

Send a burst of output packets on a transmit queue of an Ethernet device.

The rte_eth_tx_burst() function is invoked to transmit output packets on the output queue queue_id of the Ethernet device designated by its port_id. The nb_pkts parameter is the number of packets to send which are supplied in the tx_pkts array of rte_mbuf structures. The rte_eth_tx_burst() function loops, sending nb_pkts packets, up to the number of transmit descriptors available in the TX ring of the transmit queue. For each packet to send, the rte_eth_tx_burst() function performs the following operations:

Pick up the next available descriptor in the transmit ring.

Free the network buffer previously sent with that descriptor, if any.

Initialize the transmit descriptor with the information provided in the *rte_mbuf data structure.

In the case of a segmented packet composed of a list of rte_mbuf buffers, the rte_eth_tx_burst() function uses several transmit descriptors of the ring.

The rte_eth_tx_burst() function returns the number of packets it actually sent. A return value equal to nb_pkts means that all packets have been sent, and this is likely to signify that other output packets could be immediately transmitted again. Applications that implement a "send as many packets to transmit as possible" policy can check this specific case and keep invoking the rte_eth_tx_burst() function until a value less than nb_pkts is returned.

It is the responsibility of the rte_eth_tx_burst() function to transparently free the memory buffers of packets previously sent. This feature is driven by the tx_free_thresh value supplied to the rte_eth_dev_configure() function at device configuration time. When the number of free TX descriptors drops below this threshold, the rte_eth_tx_burst() function must [attempt to] free the rte_mbuf buffers of those packets whose transmission was effectively completed.

Parameters

port_id	The port identifier of the Ethernet device.
queue_id	The index of the transmit queue through which output packets must be sent. The value must be in the range [0, nb_tx_queue - 1] previously supplied to rte_eth_dev_configure().
tx_pkts	The address of an array of nb_pkts pointers to rte_mbuf structures which contain the output packets.
nb_pkts	The maximum number of packets to transmit.

Returns: The number of output packets actually stored in transmit descriptors of the transmit ring. The return value can be less than the value of the tx_pkts parameter when the transmit ring is full or has been filled up.

Definition at line 2666 of file rte_ethdev.h.

int rte_eth_dev_fdir_add_signature_filter	(	uint8_t	port_id,
		struct rte_fdir_filter *	fdir_filter,
		uint8_t	rx_queue
	)

Setup a new signature filter rule on an Ethernet device

Parameters

port_id	The port identifier of the Ethernet device.
fdir_filter	The pointer to the fdir filter structure describing the signature filter rule. The rte_fdir_filter structure includes the values of the different fields to match: source and destination IP addresses, vlan id, flexbytes, source and destination ports, and so on.
rx_queue	The index of the RX queue where to store RX packets matching the added signature filter defined in fdir_filter.

Returns

(0) if successful.
(-ENOTSUP) if hardware doesn't support flow director mode.
(-ENODEV) if port_id invalid.
(-ENOSYS) if the FDIR mode is not configured in signature mode on port_id.
(-EINVAL) if the fdir_filter information is not correct.

int rte_eth_dev_fdir_update_signature_filter	(	uint8_t	port_id,
		struct rte_fdir_filter *	fdir_ftr,
		uint8_t	rx_queue
	)

Update a signature filter rule on an Ethernet device. If the rule doesn't exits, it is created.

Parameters

port_id	The port identifier of the Ethernet device.
fdir_ftr	The pointer to the structure describing the signature filter rule. The rte_fdir_filter structure includes the values of the different fields to match: source and destination IP addresses, vlan id, flexbytes, source and destination ports, and so on.
rx_queue	The index of the RX queue where to store RX packets matching the added signature filter defined in fdir_ftr.

Returns

(0) if successful.
(-ENOTSUP) if hardware doesn't support flow director mode.
(-ENODEV) if port_id invalid.
(-ENOSYS) if the flow director mode is not configured in signature mode on port_id.
(-EINVAL) if the fdir_filter information is not correct.

int rte_eth_dev_fdir_remove_signature_filter	(	uint8_t	port_id,
		struct rte_fdir_filter *	fdir_ftr
	)

Remove a signature filter rule on an Ethernet device.

Parameters

port_id	The port identifier of the Ethernet device.
fdir_ftr	The pointer to the structure describing the signature filter rule. The rte_fdir_filter structure includes the values of the different fields to match: source and destination IP addresses, vlan id, flexbytes, source and destination ports, and so on.

Returns

(0) if successful.
(-ENOTSUP) if hardware doesn't support flow director mode.
(-ENODEV) if port_id invalid.
(-ENOSYS) if the flow director mode is not configured in signature mode on port_id.
(-EINVAL) if the fdir_filter information is not correct.

int rte_eth_dev_fdir_get_infos	(	uint8_t	port_id,
		struct rte_eth_fdir *	fdir
	)

Retrieve the flow director information of an Ethernet device.

Parameters

port_id	The port identifier of the Ethernet device.
fdir	A pointer to a structure of type rte_eth_dev_fdir to be filled with the flow director information of the Ethernet device.

Returns

(0) if successful.
(-ENOTSUP) if hardware doesn't support flow director mode.
(-ENODEV) if port_id invalid.
(-ENOSYS) if the flow director mode is not configured on port_id.

int rte_eth_dev_fdir_add_perfect_filter	(	uint8_t	port_id,
		struct rte_fdir_filter *	fdir_filter,
		uint16_t	soft_id,
		uint8_t	rx_queue,
		uint8_t	drop
	)

Add a new perfect filter rule on an Ethernet device.

Parameters

port_id	The port identifier of the Ethernet device.
fdir_filter	The pointer to the structure describing the perfect filter rule. The rte_fdir_filter structure includes the values of the different fields to match: source and destination IP addresses, vlan id, flexbytes, source and destination ports, and so on. IPv6 are not supported.
soft_id	The 16-bit value supplied in the field hash.fdir.id of mbuf for RX packets matching the perfect filter.
rx_queue	The index of the RX queue where to store RX packets matching the added perfect filter defined in fdir_filter.
drop	If drop is set to 1, matching RX packets are stored into the RX drop queue defined in the rte_fdir_conf.

Returns

(0) if successful.
(-ENOTSUP) if hardware doesn't support flow director mode.
(-ENODEV) if port_id invalid.
(-ENOSYS) if the flow director mode is not configured in perfect mode on port_id.
(-EINVAL) if the fdir_filter information is not correct.

int rte_eth_dev_fdir_update_perfect_filter	(	uint8_t	port_id,
		struct rte_fdir_filter *	fdir_filter,
		uint16_t	soft_id,
		uint8_t	rx_queue,
		uint8_t	drop
	)

Update a perfect filter rule on an Ethernet device. If the rule doesn't exits, it is created.

Parameters

port_id	The port identifier of the Ethernet device.
fdir_filter	The pointer to the structure describing the perfect filter rule. The rte_fdir_filter structure includes the values of the different fields to match: source and destination IP addresses, vlan id, flexbytes, source and destination ports, and so on. IPv6 are not supported.
soft_id	The 16-bit value supplied in the field hash.fdir.id of mbuf for RX packets matching the perfect filter.
rx_queue	The index of the RX queue where to store RX packets matching the added perfect filter defined in fdir_filter.
drop	If drop is set to 1, matching RX packets are stored into the RX drop queue defined in the rte_fdir_conf.

Returns

(0) if successful.
(-ENOTSUP) if hardware doesn't support flow director mode.
(-ENODEV) if port_id invalid.
(-ENOSYS) if the flow director mode is not configured in perfect mode on port_id.
(-EINVAL) if the fdir_filter information is not correct.

int rte_eth_dev_fdir_remove_perfect_filter	(	uint8_t	port_id,
		struct rte_fdir_filter *	fdir_filter,
		uint16_t	soft_id
	)

Remove a perfect filter rule on an Ethernet device.

Parameters

port_id	The port identifier of the Ethernet device.
fdir_filter	The pointer to the structure describing the perfect filter rule. The rte_fdir_filter structure includes the values of the different fields to match: source and destination IP addresses, vlan id, flexbytes, source and destination ports, and so on. IPv6 are not supported.
soft_id	The soft_id value provided when adding/updating the removed filter.

Returns

(0) if successful.
(-ENOTSUP) if hardware doesn't support flow director mode.
(-ENODEV) if port_id invalid.
(-ENOSYS) if the flow director mode is not configured in perfect mode on port_id.
(-EINVAL) if the fdir_filter information is not correct.

int rte_eth_dev_fdir_set_masks	(	uint8_t	port_id,
		struct rte_fdir_masks *	fdir_mask
	)

Configure globally the masks for flow director mode for an Ethernet device. For example, the device can match packets with only the first 24 bits of the IPv4 source address.

The following fields can be masked: IPv4 addresses and L4 port numbers. The following fields can be either enabled or disabled completely for the matching functionality: VLAN ID tag; VLAN Priority + CFI bit; Flexible 2-byte tuple. IPv6 masks are not supported.

All filters must comply with the masks previously configured. For example, with a mask equal to 255.255.255.0 for the source IPv4 address, all IPv4 filters must be created with a source IPv4 address that fits the "X.X.X.0" format.

This function flushes all filters that have been previously added in the device.

Parameters

port_id	The port identifier of the Ethernet device.
fdir_mask	The pointer to the fdir mask structure describing relevant headers fields and relevant bits to use when matching packets addresses and ports. IPv6 masks are not supported.

Returns

(0) if successful.
(-ENOTSUP) if hardware doesn't support flow director mode.
(-ENODEV) if port_id invalid.
(-ENOSYS) if the flow director mode is not configured in perfect mode on port_id.
(-EINVAL) if the fdir_filter information is not correct

int rte_eth_dev_callback_register	(	uint8_t	port_id,
		enum rte_eth_event_type	event,
		rte_eth_dev_cb_fn	cb_fn,
		void *	cb_arg
	)

Register a callback function for specific port id.

Parameters

port_id	Port id.
event	Event interested.
cb_fn	User supplied callback function to be called.
cb_arg	Pointer to the parameters for the registered callback.

Returns

On success, zero.
On failure, a negative value.

int rte_eth_dev_callback_unregister	(	uint8_t	port_id,
		enum rte_eth_event_type	event,
		rte_eth_dev_cb_fn	cb_fn,
		void *	cb_arg
	)

Unregister a callback function for specific port id.

Parameters

port_id	Port id.
event	Event interested.
cb_fn	User supplied callback function to be called.
cb_arg	Pointer to the parameters for the registered callback. -1 means to remove all for the same callback address and same event.

Returns

On success, zero.
On failure, a negative value.

int rte_eth_dev_rx_intr_enable	(	uint8_t	port_id,
		uint16_t	queue_id
	)

When there is no rx packet coming in Rx Queue for a long time, we can sleep lcore related to RX Queue for power saving, and enable rx interrupt to be triggered when rx packect arrives.

The rte_eth_dev_rx_intr_enable() function enables rx queue interrupt on specific rx queue of a port.

Parameters

port_id	The port identifier of the Ethernet device.
queue_id	The index of the receive queue from which to retrieve input packets. The value must be in the range [0, nb_rx_queue - 1] previously supplied to rte_eth_dev_configure().

Returns

(0) if successful.
(-ENOTSUP) if underlying hardware OR driver doesn't support that operation.
(-ENODEV) if port_id invalid.

int rte_eth_dev_rx_intr_disable	(	uint8_t	port_id,
		uint16_t	queue_id
	)

When lcore wakes up from rx interrupt indicating packet coming, disable rx interrupt and returns to polling mode.

The rte_eth_dev_rx_intr_disable() function disables rx queue interrupt on specific rx queue of a port.

Parameters

port_id	The port identifier of the Ethernet device.
queue_id	The index of the receive queue from which to retrieve input packets. The value must be in the range [0, nb_rx_queue - 1] previously supplied to rte_eth_dev_configure().

Returns

(0) if successful.
(-ENOTSUP) if underlying hardware OR driver doesn't support that operation.
(-ENODEV) if port_id invalid.

int rte_eth_dev_rx_intr_ctl	(	uint8_t	port_id,
		int	epfd,
		int	op,
		void *	data
	)

RX Interrupt control per port.

Parameters

port_id	The port identifier of the Ethernet device.
epfd	Epoll instance fd which the intr vector associated to. Using RTE_EPOLL_PER_THREAD allows to use per thread epoll instance.
op	The operation be performed for the vector. Operation type of {RTE_INTR_EVENT_ADD, RTE_INTR_EVENT_DEL}.
data	User raw data.

Returns

On success, zero.
On failure, a negative value.

int rte_eth_dev_rx_intr_ctl_q	(	uint8_t	port_id,
		uint16_t	queue_id,
		int	epfd,
		int	op,
		void *	data
	)

RX Interrupt control per queue.

Parameters

port_id	The port identifier of the Ethernet device.
queue_id	The index of the receive queue from which to retrieve input packets. The value must be in the range [0, nb_rx_queue - 1] previously supplied to rte_eth_dev_configure().
epfd	Epoll instance fd which the intr vector associated to. Using RTE_EPOLL_PER_THREAD allows to use per thread epoll instance.
op	The operation be performed for the vector. Operation type of {RTE_INTR_EVENT_ADD, RTE_INTR_EVENT_DEL}.
data	User raw data.

Returns

On success, zero.
On failure, a negative value.

int rte_eth_led_on ( uint8_t port_id )

Turn on the LED on the Ethernet device. This function turns on the LED on the Ethernet device.

Parameters

port_id The port identifier of the Ethernet device.

Returns

(0) if successful.
(-ENOTSUP) if underlying hardware OR driver doesn't support that operation.
(-ENODEV) if port_id invalid.

int rte_eth_led_off ( uint8_t port_id )

Turn off the LED on the Ethernet device. This function turns off the LED on the Ethernet device.

Parameters

port_id The port identifier of the Ethernet device.

Returns

(0) if successful.
(-ENOTSUP) if underlying hardware OR driver doesn't support that operation.
(-ENODEV) if port_id invalid.

int rte_eth_dev_flow_ctrl_get	(	uint8_t	port_id,
		struct rte_eth_fc_conf *	fc_conf
	)

Get current status of the Ethernet link flow control for Ethernet device

Parameters

port_id	The port identifier of the Ethernet device.
fc_conf	The pointer to the structure where to store the flow control parameters.

Returns

(0) if successful.
(-ENOTSUP) if hardware doesn't support flow control.
(-ENODEV) if port_id invalid.

int rte_eth_dev_flow_ctrl_set	(	uint8_t	port_id,
		struct rte_eth_fc_conf *	fc_conf
	)

Configure the Ethernet link flow control for Ethernet device

Parameters

port_id	The port identifier of the Ethernet device.
fc_conf	The pointer to the structure of the flow control parameters.

Returns

(0) if successful.
(-ENOTSUP) if hardware doesn't support flow control mode.
(-ENODEV) if port_id invalid.
(-EINVAL) if bad parameter
(-EIO) if flow control setup failure

int rte_eth_dev_priority_flow_ctrl_set	(	uint8_t	port_id,
		struct rte_eth_pfc_conf *	pfc_conf
	)

Configure the Ethernet priority flow control under DCB environment for Ethernet device.

Parameters

port_id	The port identifier of the Ethernet device.
pfc_conf	The pointer to the structure of the priority flow control parameters.

Returns

(0) if successful.
(-ENOTSUP) if hardware doesn't support priority flow control mode.
(-ENODEV) if port_id invalid.
(-EINVAL) if bad parameter
(-EIO) if flow control setup failure

int rte_eth_dev_mac_addr_add	(	uint8_t	port,
		struct ether_addr *	mac_addr,
		uint32_t	pool
	)

Add a MAC address to an internal array of addresses used to enable whitelist filtering to accept packets only if the destination MAC address matches.

Parameters

port	The port identifier of the Ethernet device.
mac_addr	The MAC address to add.
pool	VMDq pool index to associate address with (if VMDq is enabled). If VMDq is not enabled, this should be set to 0.

Returns

(0) if successfully added or mac_addr" was already added.
(-ENOTSUP) if hardware doesn't support this feature.
(-ENODEV) if *port is invalid.
(-ENOSPC) if no more MAC addresses can be added.
(-EINVAL) if MAC address is invalid.

int rte_eth_dev_mac_addr_remove	(	uint8_t	port,
		struct ether_addr *	mac_addr
	)

Remove a MAC address from the internal array of addresses.

Parameters

port	The port identifier of the Ethernet device.
mac_addr	MAC address to remove.

Returns

(0) if successful, or mac_addr didn't exist.
(-ENOTSUP) if hardware doesn't support.
(-ENODEV) if port invalid.
(-EADDRINUSE) if attempting to remove the default MAC address

int rte_eth_dev_default_mac_addr_set	(	uint8_t	port,
		struct ether_addr *	mac_addr
	)

Set the default MAC address.

Parameters

port	The port identifier of the Ethernet device.
mac_addr	New default MAC address.

Returns

(0) if successful, or mac_addr didn't exist.
(-ENOTSUP) if hardware doesn't support.
(-ENODEV) if port invalid.
(-EINVAL) if MAC address is invalid.

int rte_eth_dev_rss_reta_update	(	uint8_t	port,
		struct rte_eth_rss_reta_entry64 *	reta_conf,
		uint16_t	reta_size
	)

Update Redirection Table(RETA) of Receive Side Scaling of Ethernet device.

Parameters

port	The port identifier of the Ethernet device.
reta_conf	RETA to update.
reta_size	Redirection table size. The table size can be queried by rte_eth_dev_info_get().

Returns

(0) if successful.
(-ENOTSUP) if hardware doesn't support.
(-EINVAL) if bad parameter.

int rte_eth_dev_rss_reta_query	(	uint8_t	port,
		struct rte_eth_rss_reta_entry64 *	reta_conf,
		uint16_t	reta_size
	)

Query Redirection Table(RETA) of Receive Side Scaling of Ethernet device.

Parameters

port	The port identifier of the Ethernet device.
reta_conf	RETA to query.
reta_size	Redirection table size. The table size can be queried by rte_eth_dev_info_get().

Returns

(0) if successful.
(-ENOTSUP) if hardware doesn't support.
(-EINVAL) if bad parameter.

int rte_eth_dev_uc_hash_table_set	(	uint8_t	port,
		struct ether_addr *	addr,
		uint8_t	on
	)

Updates unicast hash table for receiving packet with the given destination MAC address, and the packet is routed to all VFs for which the RX mode is accept packets that match the unicast hash table.

Parameters

port	The port identifier of the Ethernet device.
addr	Unicast MAC address.
on	1 - Set an unicast hash bit for receiving packets with the MAC address. 0 - Clear an unicast hash bit.

Returns

(0) if successful.
(-ENOTSUP) if hardware doesn't support.
(-ENODEV) if port_id invalid.
(-EINVAL) if bad parameter.

int rte_eth_dev_uc_all_hash_table_set	(	uint8_t	port,
		uint8_t	on
	)

Updates all unicast hash bitmaps for receiving packet with any Unicast Ethernet MAC addresses,the packet is routed to all VFs for which the RX mode is accept packets that match the unicast hash table.

Parameters

port	The port identifier of the Ethernet device.
on	1 - Set all unicast hash bitmaps for receiving all the Ethernet MAC addresses 0 - Clear all unicast hash bitmaps

Returns

(0) if successful.
(-ENOTSUP) if hardware doesn't support.
(-ENODEV) if port_id invalid.
(-EINVAL) if bad parameter.

int rte_eth_dev_set_vf_rxmode	(	uint8_t	port,
		uint16_t	vf,
		uint16_t	rx_mode,
		uint8_t	on
	)

Set RX L2 Filtering mode of a VF of an Ethernet device.

Parameters

port	The port identifier of the Ethernet device.
vf	VF id.
rx_mode	The RX mode mask, which is one or more of accepting Untagged Packets, packets that match the PFUTA table, Broadcast and Multicast Promiscuous. ETH_VMDQ_ACCEPT_UNTAG,ETH_VMDQ_ACCEPT_HASH_UC, ETH_VMDQ_ACCEPT_BROADCAST and ETH_VMDQ_ACCEPT_MULTICAST will be used in rx_mode.
on	1 - Enable a VF RX mode. 0 - Disable a VF RX mode.

Returns

(0) if successful.
(-ENOTSUP) if hardware doesn't support.
(-ENOTSUP) if hardware doesn't support.
(-EINVAL) if bad parameter.

int rte_eth_dev_set_vf_tx	(	uint8_t	port,
		uint16_t	vf,
		uint8_t	on
	)

Enable or disable a VF traffic transmit of the Ethernet device.

Parameters

port	The port identifier of the Ethernet device.
vf	VF id.
on	1 - Enable a VF traffic transmit. 0 - Disable a VF traffic transmit.

Returns

(0) if successful.
(-ENODEV) if port_id invalid.
(-ENOTSUP) if hardware doesn't support.
(-EINVAL) if bad parameter.

int rte_eth_dev_set_vf_rx	(	uint8_t	port,
		uint16_t	vf,
		uint8_t	on
	)

Enable or disable a VF traffic receive of an Ethernet device.

Parameters

port	The port identifier of the Ethernet device.
vf	VF id.
on	1 - Enable a VF traffic receive. 0 - Disable a VF traffic receive.

Returns

(0) if successful.
(-ENOTSUP) if hardware doesn't support.
(-ENODEV) if port_id invalid.
(-EINVAL) if bad parameter.

int rte_eth_dev_set_vf_vlan_filter	(	uint8_t	port,
		uint16_t	vlan_id,
		uint64_t	vf_mask,
		uint8_t	vlan_on
	)

Enable/Disable hardware VF VLAN filtering by an Ethernet device of received VLAN packets tagged with a given VLAN Tag Identifier.

Parameters

port	id The port identifier of the Ethernet device.
vlan_id	The VLAN Tag Identifier whose filtering must be enabled or disabled.
vf_mask	Bitmap listing which VFs participate in the VLAN filtering.
vlan_on	1 - Enable VFs VLAN filtering. 0 - Disable VFs VLAN filtering.

Returns

(0) if successful.
(-ENOTSUP) if hardware doesn't support.
(-ENODEV) if port_id invalid.
(-EINVAL) if bad parameter.

int rte_eth_mirror_rule_set	(	uint8_t	port_id,
		struct rte_eth_mirror_conf *	mirror_conf,
		uint8_t	rule_id,
		uint8_t	on
	)

Set a traffic mirroring rule on an Ethernet device

Parameters

port_id	The port identifier of the Ethernet device.
mirror_conf	The pointer to the traffic mirroring structure describing the mirroring rule. The rte_eth_vm_mirror_conf structure includes the type of mirroring rule, destination pool and the value of rule if enable vlan or pool mirroring.
rule_id	The index of traffic mirroring rule, we support four separated rules.
on	1 - Enable a mirroring rule. 0 - Disable a mirroring rule.

Returns

(0) if successful.
(-ENOTSUP) if hardware doesn't support this feature.
(-ENODEV) if port_id invalid.
(-EINVAL) if the mr_conf information is not correct.

int rte_eth_mirror_rule_reset	(	uint8_t	port_id,
		uint8_t	rule_id
	)

Reset a traffic mirroring rule on an Ethernet device.

Parameters

port_id	The port identifier of the Ethernet device.
rule_id	The index of traffic mirroring rule, we support four separated rules.

Returns

(0) if successful.
(-ENOTSUP) if hardware doesn't support this feature.
(-ENODEV) if port_id invalid.
(-EINVAL) if bad parameter.

int rte_eth_set_queue_rate_limit	(	uint8_t	port_id,
		uint16_t	queue_idx,
		uint16_t	tx_rate
	)

Set the rate limitation for a queue on an Ethernet device.

Parameters

port_id	The port identifier of the Ethernet device.
queue_idx	The queue id.
tx_rate	The tx rate allocated from the total link speed for this queue.

Returns

(0) if successful.
(-ENOTSUP) if hardware doesn't support this feature.
(-ENODEV) if port_id invalid.
(-EINVAL) if bad parameter.

int rte_eth_set_vf_rate_limit	(	uint8_t	port_id,
		uint16_t	vf,
		uint16_t	tx_rate,
		uint64_t	q_msk
	)

Set the rate limitation for a vf on an Ethernet device.

Parameters

port_id	The port identifier of the Ethernet device.
vf	VF id.
tx_rate	The tx rate allocated from the total link speed for this VF id.
q_msk	The queue mask which need to set the rate.

Returns

(0) if successful.
(-ENOTSUP) if hardware doesn't support this feature.
(-ENODEV) if port_id invalid.
(-EINVAL) if bad parameter.

int rte_eth_dev_bypass_init ( uint8_t port )

Initialize bypass logic. This function needs to be called before executing any other bypass API.

Parameters

port	The port identifier of the Ethernet device.

Returns

(0) if successful.
(-ENOTSUP) if hardware doesn't support.
(-EINVAL) if bad parameter.

int rte_eth_dev_bypass_state_show	(	uint8_t	port,
		uint32_t *	state
	)

Return bypass state.

Parameters

port	The port identifier of the Ethernet device.
state	The return bypass state. (1) Normal mode (2) Bypass mode (3) Isolate mode

Returns

(0) if successful.
(-ENOTSUP) if hardware doesn't support.
(-EINVAL) if bad parameter.

int rte_eth_dev_bypass_state_set	(	uint8_t	port,
		uint32_t *	new_state
	)

Set bypass state

Parameters

port	The port identifier of the Ethernet device.
new_state	The current bypass state. (1) Normal mode (2) Bypass mode (3) Isolate mode

Returns

(0) if successful.
(-ENOTSUP) if hardware doesn't support.
(-EINVAL) if bad parameter.

int rte_eth_dev_bypass_event_show	(	uint8_t	port,
		uint32_t	event,
		uint32_t *	state
	)

Return bypass state when given event occurs.

Parameters

port	The port identifier of the Ethernet device.
event	The bypass event (1) Main power on (power button is pushed) (2) Auxiliary power on (power supply is being plugged) (3) Main power off (system shutdown and power supply is left plugged in) (4) Auxiliary power off (power supply is being unplugged) (5) Display or set the watchdog timer
state	The bypass state when given event occurred. (1) Normal mode (2) Bypass mode (3) Isolate mode

Returns

(0) if successful.
(-ENOTSUP) if hardware doesn't support.
(-EINVAL) if bad parameter.

int rte_eth_dev_bypass_event_store	(	uint8_t	port,
		uint32_t	event,
		uint32_t	state
	)

Set bypass state when given event occurs.

Parameters

port	The port identifier of the Ethernet device.
event	The bypass event (1) Main power on (power button is pushed) (2) Auxiliary power on (power supply is being plugged) (3) Main power off (system shutdown and power supply is left plugged in) (4) Auxiliary power off (power supply is being unplugged) (5) Display or set the watchdog timer
state	The assigned state when given event occurs. (1) Normal mode (2) Bypass mode (3) Isolate mode

Returns

(0) if successful.
(-ENOTSUP) if hardware doesn't support.
(-EINVAL) if bad parameter.

int rte_eth_dev_wd_timeout_store	(	uint8_t	port,
		uint32_t	timeout
	)

Set bypass watchdog timeout count.

Parameters

port	The port identifier of the Ethernet device.
timeout	The timeout to be set. (0) 0 seconds (timer is off) (1) 1.5 seconds (2) 2 seconds (3) 3 seconds (4) 4 seconds (5) 8 seconds (6) 16 seconds (7) 32 seconds

Returns

(0) if successful.
(-ENOTSUP) if hardware doesn't support.
(-EINVAL) if bad parameter.

int rte_eth_dev_bypass_ver_show	(	uint8_t	port,
		uint32_t *	ver
	)

Get bypass firmware version.

Parameters

port	The port identifier of the Ethernet device.
ver	The firmware version

Returns

(0) if successful.
(-ENOTSUP) if hardware doesn't support.
(-EINVAL) if bad parameter.

int rte_eth_dev_bypass_wd_timeout_show	(	uint8_t	port,
		uint32_t *	wd_timeout
	)

Return bypass watchdog timeout in seconds

Parameters

port	The port identifier of the Ethernet device.
wd_timeout	The return watchdog timeout. "0" represents timer expired (0) 0 seconds (timer is off) (1) 1.5 seconds (2) 2 seconds (3) 3 seconds (4) 4 seconds (5) 8 seconds (6) 16 seconds (7) 32 seconds

Returns

(0) if successful.
(-ENOTSUP) if hardware doesn't support.
(-EINVAL) if bad parameter.

int rte_eth_dev_bypass_wd_reset ( uint8_t port )

Reset bypass watchdog timer

Parameters

port	The port identifier of the Ethernet device.

Returns

(0) if successful.
(-ENOTSUP) if hardware doesn't support.
(-EINVAL) if bad parameter.

int rte_eth_dev_rss_hash_update	(	uint8_t	port_id,
		struct rte_eth_rss_conf *	rss_conf
	)

Configuration of Receive Side Scaling hash computation of Ethernet device.

Parameters

port_id	The port identifier of the Ethernet device.
rss_conf	The new configuration to use for RSS hash computation on the port.

Returns

(0) if successful.
(-ENODEV) if port identifier is invalid.
(-ENOTSUP) if hardware doesn't support.
(-EINVAL) if bad parameter.

int rte_eth_dev_rss_hash_conf_get	(	uint8_t	port_id,
		struct rte_eth_rss_conf *	rss_conf
	)

Retrieve current configuration of Receive Side Scaling hash computation of Ethernet device.

Parameters

port_id	The port identifier of the Ethernet device.
rss_conf	Where to store the current RSS hash configuration of the Ethernet device.

Returns

(0) if successful.
(-ENODEV) if port identifier is invalid.
(-ENOTSUP) if hardware doesn't support RSS.

int rte_eth_dev_udp_tunnel_add	(	uint8_t	port_id,
		struct rte_eth_udp_tunnel *	tunnel_udp
	)

Add UDP tunneling port of an Ethernet device for filtering a specific tunneling packet by UDP port number.

Parameters

port_id	The port identifier of the Ethernet device.
tunnel_udp	UDP tunneling configuration.

Returns

(0) if successful.
(-ENODEV) if port identifier is invalid.
(-ENOTSUP) if hardware doesn't support tunnel type.

int rte_eth_dev_udp_tunnel_delete	(	uint8_t	port_id,
		struct rte_eth_udp_tunnel *	tunnel_udp
	)

Detete UDP tunneling port configuration of Ethernet device

Parameters

port_id	The port identifier of the Ethernet device.
tunnel_udp	UDP tunneling configuration.

Returns

(0) if successful.
(-ENODEV) if port identifier is invalid.
(-ENOTSUP) if hardware doesn't support tunnel type.

int rte_eth_dev_filter_supported	(	uint8_t	port_id,
		enum rte_filter_type	filter_type
	)

Check whether the filter type is supported on an Ethernet device. All the supported filter types are defined in 'rte_eth_ctrl.h'.

Parameters

port_id	The port identifier of the Ethernet device.
filter_type	Filter type.

Returns

(0) if successful.
(-ENOTSUP) if hardware doesn't support this filter type.
(-ENODEV) if port_id invalid.

int rte_eth_dev_filter_ctrl	(	uint8_t	port_id,
		enum rte_filter_type	filter_type,
		enum rte_filter_op	filter_op,
		void *	arg
	)

Take operations to assigned filter type on an Ethernet device. All the supported operations and filter types are defined in 'rte_eth_ctrl.h'.

Parameters

port_id	The port identifier of the Ethernet device.
filter_type	Filter type.
filter_op	Type of operation.
arg	A pointer to arguments defined specifically for the operation.

Returns

(0) if successful.
(-ENOTSUP) if hardware doesn't support.
(-ENODEV) if port_id invalid.
others depends on the specific operations implementation.

void* rte_eth_add_rx_callback	(	uint8_t	port_id,
		uint16_t	queue_id,
		rte_rx_callback_fn	fn,
		void *	user_param
	)

Add a callback to be called on packet RX on a given port and queue.

This API configures a function to be called for each burst of packets received on a given NIC port queue. The return value is a pointer that can be used to later remove the callback using rte_eth_remove_rx_callback().

Multiple functions are called in the order that they are added.

Parameters

port_id	The port identifier of the Ethernet device.
queue_id	The queue on the Ethernet device on which the callback is to be added.
fn	The callback function
user_param	A generic pointer parameter which will be passed to each invocation of the callback function on this port and queue.

Returns: NULL on error. On success, a pointer value which can later be used to remove the callback.

void* rte_eth_add_tx_callback	(	uint8_t	port_id,
		uint16_t	queue_id,
		rte_tx_callback_fn	fn,
		void *	user_param
	)

Add a callback to be called on packet TX on a given port and queue.

This API configures a function to be called for each burst of packets sent on a given NIC port queue. The return value is a pointer that can be used to later remove the callback using rte_eth_remove_tx_callback().

Multiple functions are called in the order that they are added.

Parameters

port_id	The port identifier of the Ethernet device.
queue_id	The queue on the Ethernet device on which the callback is to be added.
fn	The callback function
user_param	A generic pointer parameter which will be passed to each invocation of the callback function on this port and queue.

Returns: NULL on error. On success, a pointer value which can later be used to remove the callback.

int rte_eth_remove_rx_callback	(	uint8_t	port_id,
		uint16_t	queue_id,
		struct rte_eth_rxtx_callback *	user_cb
	)

Remove an RX packet callback from a given port and queue.

This function is used to removed callbacks that were added to a NIC port queue using rte_eth_add_rx_callback().

Note: the callback is removed from the callback list but it isn't freed since the it may still be in use. The memory for the callback can be subsequently freed back by the application by calling rte_free():

Immediately - if the port is stopped, or the user knows that no callbacks are in flight e.g. if called from the thread doing RX/TX on that queue.

After a short delay - where the delay is sufficient to allow any in-flight callbacks to complete.

Parameters

port_id	The port identifier of the Ethernet device.
queue_id	The queue on the Ethernet device from which the callback is to be removed.
user_cb	User supplied callback created via rte_eth_add_rx_callback().

Returns

0: Success. Callback was removed.
-ENOTSUP: Callback support is not available.
-EINVAL: The port_id or the queue_id is out of range, or the callback is NULL or not found for the port/queue.

int rte_eth_remove_tx_callback	(	uint8_t	port_id,
		uint16_t	queue_id,
		struct rte_eth_rxtx_callback *	user_cb
	)

Remove a TX packet callback from a given port and queue.

This function is used to removed callbacks that were added to a NIC port queue using rte_eth_add_tx_callback().

Note: the callback is removed from the callback list but it isn't freed since the it may still be in use. The memory for the callback can be subsequently freed back by the application by calling rte_free():

Immediately - if the port is stopped, or the user knows that no callbacks are in flight e.g. if called from the thread doing RX/TX on that queue.

After a short delay - where the delay is sufficient to allow any in-flight callbacks to complete.

Parameters

port_id	The port identifier of the Ethernet device.
queue_id	The queue on the Ethernet device from which the callback is to be removed.
user_cb	User supplied callback created via rte_eth_add_tx_callback().

Returns

0: Success. Callback was removed.
-ENOTSUP: Callback support is not available.
-EINVAL: The port_id or the queue_id is out of range, or the callback is NULL or not found for the port/queue.

int rte_eth_dev_get_reg_length ( uint8_t port_id )

Retrieve number of available registers for access

Parameters

port_id The port identifier of the Ethernet device.

Returns

(>=0) number of registers if successful.
(-ENOTSUP) if hardware doesn't support.
(-ENODEV) if port_id invalid.
others depends on the specific operations implementation.

int rte_eth_dev_get_reg_info	(	uint8_t	port_id,
		struct rte_dev_reg_info *	info
	)

Retrieve device registers and register attributes

Parameters

port_id	The port identifier of the Ethernet device.
info	The template includes buffer for register data and attribute to be filled.

Returns

(0) if successful.
(-ENOTSUP) if hardware doesn't support.
(-ENODEV) if port_id invalid.
others depends on the specific operations implementation.

int rte_eth_dev_get_eeprom_length ( uint8_t port_id )

Retrieve size of device EEPROM

Parameters

port_id The port identifier of the Ethernet device.

Returns

(>=0) EEPROM size if successful.
(-ENOTSUP) if hardware doesn't support.
(-ENODEV) if port_id invalid.
others depends on the specific operations implementation.

int rte_eth_dev_get_eeprom	(	uint8_t	port_id,
		struct rte_dev_eeprom_info *	info
	)

Retrieve EEPROM and EEPROM attribute

Parameters

port_id	The port identifier of the Ethernet device.
info	The template includes buffer for return EEPROM data and EEPROM attributes to be filled.

Returns

(0) if successful.
(-ENOTSUP) if hardware doesn't support.
(-ENODEV) if port_id invalid.
others depends on the specific operations implementation.

int rte_eth_dev_set_eeprom	(	uint8_t	port_id,
		struct rte_dev_eeprom_info *	info
	)

Program EEPROM with provided data

Parameters

port_id	The port identifier of the Ethernet device.
info	The template includes EEPROM data for programming and EEPROM attributes to be filled

Returns

(0) if successful.
(-ENOTSUP) if hardware doesn't support.
(-ENODEV) if port_id invalid.
others depends on the specific operations implementation.

int rte_eth_dev_set_mc_addr_list	(	uint8_t	port_id,
		struct ether_addr *	mc_addr_set,
		uint32_t	nb_mc_addr
	)

Set the list of multicast addresses to filter on an Ethernet device.

Parameters

port_id	The port identifier of the Ethernet device.
mc_addr_set	The array of multicast addresses to set. Equal to NULL when the function is invoked to flush the set of filtered addresses.
nb_mc_addr	The number of multicast addresses in the mc_addr_set array. Equal to 0 when the function is invoked to flush the set of filtered addresses.

Returns

(0) if successful.
(-ENODEV) if port_id invalid.
(-ENOTSUP) if PMD of port_id doesn't support multicast filtering.
(-ENOSPC) if port_id has not enough multicast filtering resources.

int rte_eth_timesync_enable ( uint8_t port_id )

Enable IEEE1588/802.1AS timestamping for an Ethernet device.

Parameters

port_id The port identifier of the Ethernet device.

Returns

0: Success.
-ENODEV: The port ID is invalid.
-ENOTSUP: The function is not supported by the Ethernet driver.

int rte_eth_timesync_disable ( uint8_t port_id )

Disable IEEE1588/802.1AS timestamping for an Ethernet device.

Parameters

port_id The port identifier of the Ethernet device.

Returns

0: Success.
-ENODEV: The port ID is invalid.
-ENOTSUP: The function is not supported by the Ethernet driver.

int rte_eth_timesync_read_rx_timestamp	(	uint8_t	port_id,
		struct timespec *	timestamp,
		uint32_t	flags
	)

Read an IEEE1588/802.1AS RX timestamp from an Ethernet device.

Parameters

port_id	The port identifier of the Ethernet device.
timestamp	Pointer to the timestamp struct.
flags	Device specific flags. Used to pass the RX timesync register index to i40e. Unused in igb/ixgbe, pass 0 instead.

Returns

0: Success.
-EINVAL: No timestamp is available.
-ENODEV: The port ID is invalid.
-ENOTSUP: The function is not supported by the Ethernet driver.

int rte_eth_timesync_read_tx_timestamp	(	uint8_t	port_id,
		struct timespec *	timestamp
	)

Read an IEEE1588/802.1AS TX timestamp from an Ethernet device.

Parameters

port_id	The port identifier of the Ethernet device.
timestamp	Pointer to the timestamp struct.

Returns

0: Success.
-EINVAL: No timestamp is available.
-ENODEV: The port ID is invalid.
-ENOTSUP: The function is not supported by the Ethernet driver.

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