rdma_cap_roce_gid_table(9)

💖 NAME 💖

okay bestie, welcome to the Kernel API Manual page for rdma_cap_roce_gid_table — yes, the function name is a mouthful, but she's iconic. This one checks if the port of a device uses roce_gid_table. No cap.

✨ SYNOPSIS ✨

bool rdma_cap_roce_gid_table (const struct ib_device *device , u32
       port_num );

🎀 ARGUMENTS 🎀

• device — the device to check. Like, which device are we checking, bestie? This one.
• port_num — the port number to check. Gotta point at the exact port whose vibe we're verifying.

🦋 DESCRIPTION 🦋

The RoCE GID table mechanism is the whole setup that manages the various GIDs for a device. It's giving "GID admin with main character energy," honestly.

⚠️ NOTE ⚠️

important heads-up, bestie: if allocating the port's GID table has failed, this call will still return true, but any RoCE GID table API will fail. So don't let that true fool you — the GID table APIs are not okay. 😭

💜 RETURN 💜

It returns true if the port uses RoCE GID table mechanism in order to manage its GIDs. That's the whole yes-energy vibe check. ✨

👀 SEE ALSO 👀

okay, the related-pages group chat is large, and we are not skipping a single member. First, the kernel file: ./include/rdma/ib_verbs.h. Then all of these:

• struct rdma_stat_desc(9), struct rdma_hw_stats(9), ib_rate_to_mult(9), ib_rate_to_mbps(9), ib_port_attr_to_speed_info(9), enum ib_mr_type(9), struct ib_mr_status(9), mult_to_ib_rate(9)
• struct ib_udata(9), struct rdma_netdev(9), struct ib_device_ops(9), ib_get_client_data(9), ib_modify_qp_is_ok(9), rdma_cap_ib_switch(9), rdma_start_port(9), rdma_for_each_port(9)
• rdma_end_port(9), rdma_cap_ib_mad(9), rdma_cap_opa_mad(9), rdma_cap_ib_smi(9), rdma_cap_ib_cm(9), rdma_cap_iw_cm(9), rdma_cap_ib_sa(9), rdma_cap_ib_mcast(9)
• rdma_cap_af_ib(9), rdma_cap_eth_ah(9), rdma_cap_opa_ah(9), rdma_max_mad_size(9), rdma_core_cap_opa_port(9), rdma_mtu_enum_to_int(9), rdma_mtu_from_attr(9), ib_alloc_pd(9)
• ib_dealloc_pd(9), rdma_create_ah(9), rdma_create_user_ah(9), ib_get_gids_from_rdma_hdr(9), ib_get_rdma_header_version(9), ib_init_ah_attr_from_wc(9), ib_create_ah_from_wc(9), rdma_modify_ah(9)
• rdma_query_ah(9), rdma_destroy_ah_user(9), rdma_destroy_ah(9), ib_modify_srq(9), ib_query_srq(9), ib_destroy_srq_user(9), ib_destroy_srq(9), ib_post_srq_recv(9)
• ib_create_qp(9), ib_modify_qp_with_udata(9), ib_modify_qp(9), ib_query_qp(9), ib_destroy_qp(9), ib_open_qp(9), ib_close_qp(9), ib_post_send(9)
• ib_post_recv(9), ib_alloc_cq_any(9), rdma_set_cq_moderation(9), ib_destroy_cq_user(9), ib_destroy_cq(9), ib_poll_cq(9), ib_req_notify_cq(9), ib_virt_dma_to_ptr(9)
• ib_virt_dma_to_page(9), ib_dma_mapping_error(9), ib_dma_map_single(9), ib_dma_unmap_single(9), ib_dma_map_page(9), ib_dma_unmap_page(9), ib_dma_map_bvec(9), ib_dma_unmap_bvec(9)
• ib_dma_map_sgtable_attrs(9), ib_dma_map_sg(9), ib_dma_unmap_sg(9), ib_dma_max_seg_size(9), ib_dma_sync_single_for_cpu(9), ib_dma_sync_single_for_device(9), ib_dereg_mr_user(9), ib_dereg_mr(9)
• ib_update_fast_reg_key(9), ib_inc_rkey(9), ib_attach_mcast(9), ib_detach_mcast(9), ib_check_mr_status(9), ib_device_try_get(9), rdma_ah_find_type(9), ib_lid_cpu16(9)
• ib_lid_be16(9), rdma_roce_rescan_device(9), rdma_device_to_ibdev(9), ibdev_to_node(9), rdma_device_to_drv_device(9), rdma_flow_label_to_udp_sport(9), rdma_calc_flow_label(9), rdma_get_udp_sport(9)

💖 xoxo, bestie — sourced from ./include/rdma, dated October 2026, for rdma_cap_roce_gid_table(9). periodt. 💖