ib_dma_sync...e_for_device(9)

🌸 NAME 🌸

okay bestie, welcome to the Kernel API Manual — this page is ib_dma_sync...e_for_device(9), and its whole main-character job is ib_dma_sync_single_for_device — Prepare DMA region to be accessed by device. That's the vibe. ✨

✨ SYNOPSIS ✨

the signature pulled up looking exactly like this:

void ib_dma_sync_single_for_device (struct ib_device *dev , u64 addr ,
       size_t size , enum dma_data_direction dir );

no cap, that's the whole thing. 🫶

🎀 ARGUMENTS 🎀

• dev — the device for which the DMA address was created. that's the one we're doing this for, bestie.
• addr — the DMA address itself. iconic.
• size — the size of the region in bytes. gotta know how much we're working with 💅
• dir — the direction of the DMA. yes ma'am.

🔥 SEE ALSO 🔥

Kernel file: ./include/rdma/ib_verbs.h

these are the cross-reference besties, all present and accounted for:

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_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_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)

mwah 💋 this Kernel API Manual moment comes from ./include/rdma, dated October 2026, and it's the ib_dma_sync...e_for_device(9) page — periodt. 🫶