lpfc_modify_hba_eq_delay(9)

💖 lpfc_modify_hba_eq_delay(9) 💖

okay so this is the Kernel API Manual, bestie, and we're talking about lpfc_modify_hba_eq_delay — the “Modify Delay Multiplier on EQs” function. it’s giving kernel-level glow-up for event queues. 💅✨

✨ NAME ✨

lpfc_modify_hba_eq_delay — Modify Delay Multiplier on EQs

🦋 SYNOPSIS 🦋

void lpfc_modify_hba_eq_delay (struct lpfc_hba *phba , uint32_t startq ,
uint32_t numq , uint32_t usdelay );

🎀 ARGUMENTS 🎀

• phba — the HBA structure that the EQs are on, periodt.
• startq — the starting EQ index you want to modify.
• numq — the number of EQs (consecutive indexes) to modify. yes bestie, consecutive.
• usdelay — amount of delay. that’s it. that’s the delay amount. 🫶

🌈 DESCRIPTION 🌈

okay so this function revises the EQ delay on 1 or more EQs. the EQ delay gets set either by writing to a register (if supported by the SLI Port) or by a mailbox command. and the mailbox command is the social one — it allows several EQs to be updated at once. slay. 💖

the phba struct is what’s used to send a mailbox command to the HBA. startq is used to get the starting EQ index to change. numq is used to specify how many consecutive EQ indexes, starting at EQ index, are to be changed. this function is asynchronous and will wait for any mailbox commands to finish before returning. so yeah, it’s async but it’s also patient. main character energy. ⭐

return-value check, because we love clarity:

• on success this function will return a zero. ✅
• if unable to allocate enough memory this function will return -ENOMEM. 😭
• if a mailbox command fails this function will return -ENXIO. 💀

⚠️ note: on -ENXIO, some EQs may have had their delay multiplier changed. that’s the warning, bestie — don’t pretend the whole thing was untouched. 🙈

🌸 SEE ALSO 🌸

the kernel file is ./drivers/scsi/lpfc/lpfc_sli.c, and literally all of these SEE ALSO besties are in the group chat:

lpfc_sli4_pcimem_bcopy(9), lpfc_sli4_wq_put(9), lpfc_sli4_wq_release(9),
lpfc_sli4_mq_put(9), lpfc_sli4_mq_release(9), lpfc_sli4_eq_get(9),
lpfc_sli4_eq_clr_intr(9), lpfc_sli4_if6_eq_clr_intr(9),
lpfc_sli4_write_eq_db(9), lpfc_sli4_if6_write_eq_db(9),
lpfc_sli4_cq_get(9), lpfc_sli4_write_cq_db(9),
lpfc_sli4_if6_write_cq_db(9), lpfc_cmd_iocb(9), lpfc_resp_iocb(9),
__lpfc_sli_get_iocbq(9), __lpfc_clear_active_sglq(9),
__lpfc_get_active_sglq(9), lpfc_clr_rrq_active(9),
lpfc_handle_rrq_active(9), lpfc_get_active_rrq(9),
lpfc_cleanup_vports_rrqs(9), lpfc_test_rrq_active(9),
lpfc_set_rrq_active(9), __lpfc_sli_get_els_sglq(9),
__lpfc_sli_get_nvmet_sglq(9), lpfc_sli_get_iocbq(9),
__lpfc_sli_release_iocbq_s4(9), __lpfc_sli_release_iocbq_s3(9),
__lpfc_sli_release_iocbq(9), lpfc_sli_release_iocbq(9),
lpfc_sli_cancel_iocbs(9), lpfc_sli_iocb_cmd_type(9),
lpfc_sli_ring_map(9), lpfc_sli_ringtxcmpl_put(9),
lpfc_sli_ringtx_get(9), lpfc_cmf_sync_cmpl(9),
lpfc_issue_cmf_sync_wqe(9), lpfc_sli_next_iocb_slot(9),
lpfc_sli_next_iotag(9), lpfc_sli_submit_iocb(9),
lpfc_sli_update_full_ring(9), lpfc_sli_update_ring(9),
lpfc_sli_resume_iocb(9), lpfc_sli_next_hbq_slot(9),
lpfc_sli_hbqbuf_free_all(9), lpfc_sli_hbq_to_firmware(9),
lpfc_sli_hbq_to_firmware_s3(9), lpfc_sli_hbq_to_firmware_s4(9),
lpfc_sli_hbqbuf_fill_hbqs(9), lpfc_sli_hbqbuf_add_hbqs(9),
lpfc_sli_hbqbuf_init_hbqs(9), lpfc_sli_rqbuf_get(9),
lpfc_sli_hbqbuf_find(9), lpfc_sli_free_hbq(9),
lpfc_sli_chk_mbx_command(9), lpfc_sli_wake_mbox_wait(9),
lpfc_sli_def_mbox_cmpl(9), lpfc_sli_handle_mb_event(9),
lpfc_sli_get_buff(9), lpfc_nvme_unsol_ls_handler(9),
lpfc_complete_unsol_iocb(9), lpfc_sli_process_unsol_iocb(9),
lpfc_sli_iocbq_lookup(9), lpfc_sli_iocbq_lookup_by_tag(9),
lpfc_sli_process_sol_iocb(9), lpfc_sli_rsp_pointers_error(9),
lpfc_poll_eratt(9), lpfc_sli_handle_fast_ring_event(9),
lpfc_sli_sp_handle_rspiocb(9), lpfc_sli_handle_slow_ring_event(9),
lpfc_sli_handle_slow_ring_event_s3(9),
lpfc_sli_handle_slow_ring_event_s4(9), lpfc_sli_abort_iocb_ring(9),
lpfc_sli_abort_fcp_rings(9), lpfc_sli_flush_io_rings(9),
lpfc_sli_brdready_s3(9), lpfc_sli_brdready_s4(9),
lpfc_sli_brdready(9), lpfc_reset_barrier(9), lpfc_sli_brdkill(9),
lpfc_sli_brdreset(9), lpfc_sli4_brdreset(9),
lpfc_sli_brdrestart_s3(9), lpfc_sli_brdrestart_s4(9),
lpfc_sli_brdrestart(9), lpfc_sli_chipset_init(9),
lpfc_sli_hbq_count(9), lpfc_sli_hbq_entry_count(9),
lpfc_sli_hbq_size(9), lpfc_sli_hbq_setup(9), lpfc_sli4_rb_setup(9),
lpfc_sli_config_port(9), lpfc_sli_hba_setup(9),
lpfc_sli4_read_fcoe_params(9), lpfc_sli4_read_rev(9),
lpfc_sli4_get_ctl_attr(9), lpfc_sli4_retrieve_pport_name(9),
lpfc_sli4_arm_cqeq_intr(9), lpfc_sli4_get_avail_extnt_rsrc(9),
lpfc_sli4_chk_avail_extnt_rsrc(9), lpfc_sli4_cfg_post_extnts(9),
lpfc_sli4_alloc_extent(9), lpfc_sli4_dealloc_extent(9),
lpfc_ras_stop_fwlog(9), lpfc_sli4_ras_dma_free(9),
lpfc_sli4_ras_dma_alloc(9), lpfc_sli4_ras_mbox_cmpl(9),
lpfc_sli4_ras_fwlog_init(9), lpfc_sli4_ras_setup(9),
lpfc_sli4_alloc_resource_identifiers(9),
lpfc_sli4_dealloc_resource_identifiers(9),
lpfc_sli4_get_allocated_extnts(9), lpfc_sli4_repost_sgl_list(9),
lpfc_sli4_repost_io_sgl_list(9), lpfc_init_idle_stat_hb(9),
lpfc_rx_monitor_create_ring(9), lpfc_rx_monitor_destroy_ring(9),
lpfc_rx_monitor_record(9), lpfc_rx_monitor_report(9),
lpfc_cmf_setup(9), lpfc_get_platform_uuid(9),
lpfc_sli4_hba_setup(9), lpfc_mbox_timeout(9),
lpfc_sli4_mbox_completions_pending(9),
lpfc_sli4_process_missed_mbox_completions(9),
lpfc_mbox_timeout_handler(9), lpfc_sli_issue_mbox_s3(9),
lpfc_sli4_async_mbox_block(9), lpfc_sli4_async_mbox_unblock(9),
lpfc_sli4_wait_bmbx_ready(9), lpfc_sli4_post_sync_mbox(9),
lpfc_sli_issue_mbox_s4(9), lpfc_sli4_post_async_mbox(9),
lpfc_sli_issue_mbox(9), lpfc_mbox_api_table_setup(9),
__lpfc_sli_ringtx_put(9), lpfc_sli_next_iocb(9),
__lpfc_sli_issue_iocb_s3(9), __lpfc_sli_issue_fcp_io_s3(9),
__lpfc_sli_issue_fcp_io_s4(9), __lpfc_sli_issue_iocb_s4(9),
lpfc_sli_api_table_setup(9), lpfc_sli4_calc_ring(9),
lpfc_sli_issue_iocb(9), lpfc_extra_ring_setup(9),
lpfc_sli_async_event_handler(9), lpfc_sli4_setup(9),
lpfc_sli_setup(9), lpfc_sli4_queue_init(9),
lpfc_sli_queue_init(9), lpfc_sli_mbox_sys_flush(9),
lpfc_sli_host_down(9), lpfc_sli_hba_down(9),
lpfc_sli_pcimem_bcopy(9), lpfc_sli_bemem_bcopy(9),
lpfc_sli_ringpostbuf_put(9), lpfc_sli_get_buffer_tag(9),
lpfc_sli_ring_taggedbuf_get(9), lpfc_sli_ringpostbuf_get(9),
lpfc_sli_abort_els_cmpl(9), lpfc_ignore_els_cmpl(9),
lpfc_sli_issue_abort_iotag(9), lpfc_sli_hba_iocb_abort(9),
lpfc_sli_validate_fcp_iocb_for_abort(9), lpfc_sli_validate_fcp_iocb(9),
lpfc_sli_sum_iocb(9), lpfc_sli_abort_fcp_cmpl(9),
lpfc_sli_abort_iocb(9), lpfc_sli_abort_taskmgmt(9),
lpfc_sli_wake_iocb_wait(9), lpfc_chk_iocb_flg(9),
lpfc_sli_issue_iocb_wait(9), lpfc_sli_issue_mbox_wait(9),
lpfc_sli_mbox_sys_shutdown(9), lpfc_sli_eratt_read(9),
lpfc_sli4_eratt_read(9), lpfc_sli_check_eratt(9),
lpfc_intr_state_check(9), lpfc_sli_sp_intr_handler(9),
lpfc_sli_fp_intr_handler(9), lpfc_sli_intr_handler(9),
lpfc_sli4_els_xri_abort_event_proc(9),
lpfc_sli4_els_preprocess_rspiocbq(9),
lpfc_sli4_sp_handle_async_event(9), lpfc_sli4_sp_handle_mbox_event(9),
lpfc_sli4_sp_handle_mcqe(9), lpfc_sli4_sp_handle_els_wcqe(9),
lpfc_sli4_sp_handle_rel_wcqe(9), lpfc_sli4_sp_handle_abort_xri_wcqe(9),
lpfc_sli4_sp_handle_rcqe(9), lpfc_sli4_sp_handle_cqe(9),
lpfc_sli4_sp_handle_eqe(9), __lpfc_sli4_process_cq(9),
__lpfc_sli4_sp_process_cq(9), lpfc_sli4_sp_process_cq(9),
lpfc_sli4_dly_sp_process_cq(9), lpfc_sli4_fp_handle_fcp_wcqe(9),
lpfc_sli4_fp_handle_rel_wcqe(9), lpfc_sli4_nvmet_handle_rcqe(9),
lpfc_sli4_fp_handle_cqe(9), __lpfc_sli4_hba_process_cq(9),
lpfc_sli4_hba_process_cq(9), lpfc_sli4_hba_handle_eqe(9),
lpfc_sli4_dly_hba_process_cq(9), lpfc_sli4_hba_intr_handler(9),
lpfc_sli4_intr_handler(9), lpfc_sli4_queue_free(9),
lpfc_sli4_queue_alloc(9), lpfc_dual_chute_pci_bar_map(9),
lpfc_eq_create(9), lpfc_sli4_hba_intr_handler_th(9), lpfc_cq_create(9),
lpfc_cq_create_set(9), lpfc_mq_create_fb_init(9), lpfc_mq_create(9),
lpfc_wq_create(9), lpfc_rq_create(9), lpfc_mrq_create(9),
lpfc_eq_destroy(9), lpfc_cq_destroy(9), lpfc_mq_destroy(9),
lpfc_wq_destroy(9), lpfc_rq_destroy(9), lpfc_sli4_post_sgl(9),
lpfc_sli4_alloc_xri(9), __lpfc_sli4_free_xri(9), lpfc_sli4_free_xri(9),
lpfc_sli4_next_xritag(9), lpfc_sli4_post_sgl_list(9),
lpfc_sli4_post_io_sgl_block(9), lpfc_sli4_post_io_sgl_list(9),
lpfc_fc_frame_check(9), lpfc_fc_hdr_get_vfi(9),
lpfc_fc_frame_to_vport(9), lpfc_update_rcv_time_stamp(9),
lpfc_cleanup_rcv_buffers(9), lpfc_rcv_seq_check_edtov(9),
lpfc_fc_frame_add(9), lpfc_sli4_abort_partial_seq(9),
lpfc_sli4_abort_ulp_seq(9), lpfc_sli4_seq_abort_rsp_cmpl(9),
lpfc_sli4_xri_inrange(9), lpfc_sli4_seq_abort_rsp(9),
lpfc_sli4_handle_unsol_abort(9), lpfc_seq_complete(9),
lpfc_prep_seq(9), lpfc_sli4_handle_received_buffer(9),
lpfc_sli4_post_all_rpi_hdrs(9), lpfc_sli4_post_rpi_hdr(9),
lpfc_sli4_alloc_rpi(9), __lpfc_sli4_free_rpi(9), lpfc_sli4_free_rpi(9),
lpfc_sli4_remove_rpis(9), lpfc_sli4_resume_rpi(9),
lpfc_sli4_init_vpi(9), lpfc_mbx_cmpl_add_fcf_record(9),
lpfc_sli4_add_fcf_record(9), lpfc_sli4_build_dflt_fcf_record(9),
lpfc_sli4_fcf_scan_read_fcf_rec(9), lpfc_sli4_fcf_rr_read_fcf_rec(9),
lpfc_sli4_read_fcf_rec(9), lpfc_check_next_fcf_pri_level(9),
lpfc_sli4_fcf_rr_next_index_get(9), lpfc_sli4_fcf_rr_index_set(9),
lpfc_sli4_fcf_rr_index_clear(9), lpfc_mbx_cmpl_redisc_fcf_table(9),
lpfc_sli4_redisc_fcf_table(9), lpfc_sli4_fcf_dead_failthrough(9),
lpfc_sli_get_config_region23(9), lpfc_sli4_get_config_region23(9),
lpfc_sli_read_link_ste(9), lpfc_log_fw_write_cmpl(9), lpfc_wr_object(9),
lpfc_cleanup_pending_mbox(9), lpfc_drain_txq(9), lpfc_wqe_bpl2sgl(9),
lpfc_sli4_issue_wqe(9), lpfc_sli4_issue_abort_iotag(9),
lpfc_snapshot_mxp(9), lpfc_adjust_pvt_pool_count(9),
lpfc_adjust_high_watermark(9), lpfc_move_xri_pvt_to_pbl(9),
_lpfc_move_xri_pbl_to_pvt(9), lpfc_move_xri_pbl_to_pvt(9),
lpfc_keep_pvt_pool_above_lowwm(9), lpfc_release_io_buf(9),
lpfc_get_io_buf_from_private_pool(9),
lpfc_get_io_buf_from_expedite_pool(9),
lpfc_get_io_buf_from_multixri_pools(9), lpfc_get_io_buf(9),
lpfc_read_object(9), lpfc_get_sgl_per_hdwq(9), lpfc_put_sgl_per_hdwq(9),
lpfc_free_sgl_per_hdwq(9), lpfc_get_cmd_rsp_buf_per_hdwq(9),
lpfc_put_cmd_rsp_buf_per_hdwq(9), lpfc_free_cmd_rsp_buf_per_hdwq(9),
lpfc_sli_prep_wqe(9)

okay that’s the whole page, mwah 💋 — source/version ./drivers/scsi/lpfc, date October 2026, page lpfc_modify_hba_eq_delay(9). periodt. ✨💅