ibmvfc_map_sg_data(9)

okay so bestie, this is the ibmvfc_map_sg_data(9) page from the Kernel API Manual, and it’s genuinely a little DMA-mapping moment 💅✨

💖 NAME 💖

ibmvfc_map_sg_data — maps DMA for a scatterlist and initializes descriptor fields. That’s the whole vibe: scatterlist goes in, descriptor fields get set up, everybody slays. 🫶

✨ SYNOPSIS ✨

int ibmvfc_map_sg_data (struct scsi_cmnd *scmd , struct ibmvfc_event
       *evt , struct ibmvfc_cmd *vfc_cmd , struct device *dev );

yes bestie, that’s the exact signature — spaces, line break, all of it, no edits 📌

💅 ARGUMENTS 💅

• scmd — a struct scsi_cmnd that’s carrying the scatterlist. literally the main-character argument here.
• evt — the ibmvfc event struct. it’s giving event energy.
• vfc_cmd — the vfc_cmd that contains the memory descriptor. icon behavior.
• dev — the device you’re mapping DMA memory for. no cap, it matters.

🌸 RETURN 🌸

0 on success / non-zero on failure. that’s it. not a whole saga, just success or nope 😭

🦋 SEE ALSO 🦋

Kernel file ./drivers/scsi/ibmvscsi/ibmvfc-core.c — and here’s the entire friend group, no gatekeeping, no cap:

ibmvfc_trc_start(9), ibmvfc_trc_end(9), ibmvfc_get_err_index(9), ibmvfc_get_cmd_error(9),
ibmvfc_get_err_result(9), ibmvfc_retry_cmd(9), ibmvfc_get_ls_explain(9),
ibmvfc_get_gs_explain(9), ibmvfc_get_fc_type(9),
ibmvfc_set_tgt_action(9), ibmvfc_set_host_state(9),
ibmvfc_set_host_action(9), ibmvfc_reinit_host(9), ibmvfc_del_tgt(9),
ibmvfc_link_down(9), ibmvfc_init_host(9), ibmvfc_send_crq(9),
ibmvfc_send_crq_init(9), ibmvfc_send_crq_init_complete(9),
ibmvfc_init_event_pool(9), ibmvfc_free_event_pool(9),
ibmvfc_free_queue(9), ibmvfc_release_crq_queue(9),
ibmvfc_reenable_crq_queue(9), ibmvfc_reset_crq(9),
ibmvfc_valid_event(9), ibmvfc_free_event(9), ibmvfc_vfc_eh_done(9),
ibmvfc_complete_purge(9), ibmvfc_fail_request(9),
ibmvfc_purge_requests(9), ibmvfc_hard_reset_host(9),
__ibmvfc_reset_host(9), ibmvfc_reset_host(9), ibmvfc_retry_host_init(9),
__ibmvfc_get_target(9), ibmvfc_get_target(9), ibmvfc_get_host_speed(9),
ibmvfc_get_host_port_state(9), ibmvfc_set_rport_dev_loss_tmo(9),
ibmvfc_release_tgt(9), ibmvfc_get_starget_node_name(9),
ibmvfc_get_starget_port_name(9), ibmvfc_get_starget_port_id(9),
ibmvfc_wait_while_resetting(9), ibmvfc_issue_fc_host_lip(9),
ibmvfc_gather_partition_info(9), ibmvfc_set_login_info(9),
__ibmvfc_get_event(9), ibmvfc_locked_done(9), ibmvfc_init_event(9),
ibmvfc_map_sg_list(9), ibmvfc_timeout(9), ibmvfc_send_event(9),
ibmvfc_log_error(9), ibmvfc_scsi_relogin(9), ibmvfc_scsi_done(9),
ibmvfc_host_chkready(9), ibmvfc_queuecommand(9),
ibmvfc_sync_completion(9), ibmvfc_bsg_timeout_done(9),
ibmvfc_bsg_timeout(9), ibmvfc_bsg_plogi(9), ibmvfc_bsg_request(9),
ibmvfc_reset_device(9), ibmvfc_match_rport(9), ibmvfc_match_target(9),
ibmvfc_match_lun(9), ibmvfc_event_is_free(9), ibmvfc_wait_for_ops(9),
ibmvfc_cancel_all(9), ibmvfc_match_key(9), ibmvfc_match_evt(9),
ibmvfc_abort_task_set(9), ibmvfc_eh_abort_handler(9),
ibmvfc_eh_device_reset_handler(9), ibmvfc_dev_cancel_all_noreset(9),
ibmvfc_eh_target_reset_handler(9), ibmvfc_eh_host_reset_handler(9),
ibmvfc_terminate_rport_io(9), ibmvfc_get_ae_desc(9),
ibmvfc_get_link_state(9), ibmvfc_handle_async(9), ibmvfc_handle_crq(9),
ibmvfc_scan_finished(9), ibmvfc_sdev_init(9), ibmvfc_target_alloc(9),
ibmvfc_sdev_configure(9), ibmvfc_change_queue_depth(9),
ibmvfc_show_log_level(9), ibmvfc_store_log_level(9),
ibmvfc_read_trace(9), ibmvfc_next_async_crq(9), ibmvfc_next_crq(9),
ibmvfc_interrupt(9), ibmvfc_tasklet(9), ibmvfc_init_tgt(9),
ibmvfc_retry_tgt_init(9), ibmvfc_get_prli_rsp(9),
ibmvfc_tgt_prli_done(9), ibmvfc_tgt_send_prli(9),
ibmvfc_tgt_plogi_done(9), ibmvfc_tgt_send_plogi(9),
ibmvfc_tgt_implicit_logout_done(9),
__ibmvfc_tgt_get_implicit_logout_evt(9), ibmvfc_tgt_implicit_logout(9),
ibmvfc_tgt_implicit_logout_and_del_done(9),
ibmvfc_tgt_implicit_logout_and_del(9), ibmvfc_tgt_move_login_done(9),
ibmvfc_tgt_move_login(9), ibmvfc_adisc_needs_plogi(9),
ibmvfc_tgt_adisc_done(9), ibmvfc_init_passthru(9),
ibmvfc_tgt_adisc_cancel_done(9), ibmvfc_adisc_timeout(9),
ibmvfc_tgt_adisc(9), ibmvfc_tgt_query_target_done(9),
ibmvfc_tgt_query_target(9), ibmvfc_alloc_target(9),
ibmvfc_alloc_targets(9), ibmvfc_discover_targets_done(9),
ibmvfc_discover_targets(9), ibmvfc_npiv_login_done(9),
ibmvfc_npiv_login(9), ibmvfc_npiv_logout_done(9), ibmvfc_npiv_logout(9),
ibmvfc_dev_init_to_do(9), ibmvfc_dev_logo_to_do(9),
__ibmvfc_work_to_do(9), ibmvfc_work_to_do(9), ibmvfc_log_ae(9),
ibmvfc_tgt_add_nvme_rport(9), ibmvfc_tgt_add_rport(9),
ibmvfc_do_work(9), ibmvfc_work(9), ibmvfc_alloc_queue(9),
ibmvfc_init_crq(9), ibmvfc_free_mem(9), ibmvfc_alloc_mem(9),
ibmvfc_rport_add_thread(9), ibmvfc_probe(9), ibmvfc_remove(9),
ibmvfc_resume(9), ibmvfc_get_desired_dma(9), ibmvfc_module_init(9),
ibmvfc_module_exit(9)

mwah 💋 — this page’s footer energy is source/version ./drivers/scsi/ibmvscsi, date October 2026, and the manual name ibmvfc_map_sg_data(9). you ate that, bestie 🎀