[root@localhost roce]# rdma link
link hns_0/1 state ACTIVE physical_state LINK_UP netdev eno1
link hns_1/1 state ACTIVE physical_state LINK_UP netdev eno2
link hns_2/1 state ACTIVE physical_state LINK_UP netdev eno3
[root@localhost roce]# ibv_devinfo -d hns_2 -v
hca_id: hns_2
        transport:                      InfiniBand (0)
        fw_ver:                         0.778.3337
        node_guid:                      022b:19ff:fe12:0504
        sys_image_guid:                 022b:19ff:fe12:0504
        vendor_id:                      0x19e5
        vendor_part_id:                 41512
        hw_ver:                         0x130
        phys_port_cnt:                  1
        max_mr_size:                    0xffffffffffffffff
        page_size_cap:                  0xffff000
        max_qp:                         131072
        max_qp_wr:                      32768
        device_cap_flags:               0x00301400
                                        PORT_ACTIVE_EVENT
                                        RC_RNR_NAK_GEN
                                        XRC
                                        MEM_MGT_EXTENSIONS
        max_sge:                        64
        max_sge_rd:                     1
        max_cq:                         131072
        max_cqe:                        8388608
        max_mr:                         131072
        max_pd:                         2097152
        max_qp_rd_atom:                 128
        max_ee_rd_atom:                 0
        max_res_rd_atom:                0
        max_qp_init_rd_atom:            128
        max_ee_init_rd_atom:            0
        atomic_cap:                     ATOMIC_HCA (1)
        max_ee:                         0
        max_rdd:                        0
        max_mw:                         0
        max_raw_ipv6_qp:                0
        max_raw_ethy_qp:                0
        max_mcast_grp:                  0
        max_mcast_qp_attach:            0
        max_total_mcast_qp_attach:      0
        max_ah:                         0
        max_fmr:                        0
        max_srq:                        131072
        max_srq_wr:                     32768
        max_srq_sge:                    64
        max_pkeys:                      1
        local_ca_ack_delay:             0
        general_odp_caps:
        rc_odp_caps:
                                        NO SUPPORT
        uc_odp_caps:
                                        NO SUPPORT
        ud_odp_caps:
                                        NO SUPPORT
        xrc_odp_caps:
                                        NO SUPPORT
        completion_timestamp_mask not supported
        core clock not supported
        device_cap_flags_ex:            0x301400
        tso_caps:
                max_tso:                        0
        rss_caps:
                max_rwq_indirection_tables:                     0
                max_rwq_indirection_table_size:                 0
                rx_hash_function:                               0x0
                rx_hash_fields_mask:                            0x0
        max_wq_type_rq:                 0
        packet_pacing_caps:
                qp_rate_limit_min:      0kbps
                qp_rate_limit_max:      0kbps
        tag matching not supported
        num_comp_vectors:               2
                port:   1
                        state:                  PORT_ACTIVE (4)
                        max_mtu:                4096 (5)
                        active_mtu:             1024 (3)
                        sm_lid:                 0
                        port_lid:               0
                        port_lmc:               0x00
                        link_layer:             Ethernet
                        max_msg_sz:             0x80000000
                        port_cap_flags:         0x00950000
                        port_cap_flags2:        0x0000
                        max_vl_num:             invalid value (0)
                        bad_pkey_cntr:          0x0
                        qkey_viol_cntr:         0x0
                        sm_sl:                  0
                        pkey_tbl_len:           1
                        gid_tbl_len:            256
                        subnet_timeout:         0
                        init_type_reply:        0
                        active_width:           4X (2)
                        active_speed:           50.0 Gbps (64)
                        phys_state:             LINK_UP (5)
                        GID[  0]:               fe80:0000:0000:0000:022b:19ff:fe12:0504, RoCE v1
                        GID[  1]:               fe80::22b:19ff:fe12:504, RoCE v2

[root@localhost roce]# ethtool eno3
Settings for eno3:
        Supported ports: [ Backplane ]
        Supported link modes:   10000baseKR/Full
                                40000baseKR4/Full
                                25000baseKR/Full
                                50000baseKR2/Full
                                100000baseKR4/Full
                                200000baseKR4/Full
        Supported pause frame use: Symmetric
        Supports auto-negotiation: No
        Supported FEC modes: RS  LLRS
        Advertised link modes:  200000baseKR4/Full
        Advertised pause frame use: Symmetric
        Advertised auto-negotiation: No
        Advertised FEC modes: RS
        Speed: 200000Mb/s
        Duplex: Full
        Auto-negotiation: off
        Port: None
        PHYAD: 0
        Transceiver: internal
        Supports Wake-on: d
        Wake-on: d
        Current message level: 0x00000036 (54)
                               probe link ifdown ifup
        Link detected: yes
[root@localhost roce]#