ib_dma_map_page(9)

💖 ib_dma_map_page(9) — Kernel API Manual 💖

okay so bestie, welcome to ib_dma_map_page(9) from the Kernel API Manual. This is literally the “map a physical page to DMA address” function, and the whole page is short, iconic, and lowkey carried by its absolutely enormous SEE ALSO list. 💅

🌸 NAME 🌸

ib_dma_map_page — Map a physical page to DMA address

✨ SYNOPSIS ✨

u64 ib_dma_map_page (struct ib_device *dev , struct page *page ,
unsigned long offset , size_t size , enum dma_data_direction direction
);

🎀 ARGUMENTS 🎀

The cast, in order — no cap, these are the five:

• dev — the device for which the dma_addr is to be created. Main character energy fr fr.
• page — the page to be mapped. The actual page bestie.
• offset — the offset within the page.
• size — the size of the region in bytes.
• direction — the direction of the DMA. Periodt.

🌈 SEE ALSO 🌈

The original points at the kernel file ./include/rdma/ib_verbs.h, and then it fully opens the RDMA group chat. Every one of these is invited:

• Kernel file ./include/rdma/ib_verbs.h
• 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_cap_roce_gid_table(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_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)

That’s the whole page, bestie 🫶. The footer says the source/version is ./include/rdma, dated October 2026, and the footer title is ib_dma_map_page(9) again. Slay 💋✨