i40e_pci_error_slot_reset(9)
β¨ i40e_pci_error_slot_reset β a PCI slot reset just happened β¨
okay so this is a page out of the Kernel API Manual and it's about exactly one function, and honestly? she's short but she's important. bestie, let's get into it π
πΈ NAME πΈ
i40e_pci_error_slot_reset β a PCI slot reset just happened π
like. that's the whole vibe. the slot got reset. now what. π
π¦ SYNOPSIS π¦
pci_ers_result_t i40e_pci_error_slot_reset (struct pci_dev *pdev );
π ARGUMENTS π
pdevβ the PCI device information struct π«Ά that's the device we're checking up on, like "hey bestie u good?"
π DESCRIPTION π
okay so this one gets called to figure out if the driver can actually work with the device now that the PCI slot has been reset. like, the slot went through something, and we need to know if the relationship is still gonna work out or if we're breaking up π
and the test? it's honestly so simple it's iconic: if a basic connection seems good β meaning the registers are readable and their content is sane β then you return a happy little PCI_ERS_RESULT_xxx. that's it. that's the whole checklist. registers readable β¨ registers sane β¨ return the happy result π periodt.
π₯ SEE ALSO π₯
the whole i40e friend group π«Ά no cap, here they all are:
Kernel file ./drivers/net/ethernet/intel/i40e/i40e_main.ci40e_hw_to_dev(9)i40e_allocate_dma_mem(9)i40e_free_dma_mem(9)i40e_allocate_virt_mem(9)i40e_free_virt_mem(9)i40e_get_lump(9)i40e_put_lump(9)i40e_find_vsi_from_id(9)i40e_service_event_schedule(9)i40e_tx_timeout(9)i40e_get_vsi_stats_struct(9)i40e_get_netdev_stats_struct_tx(9)i40e_get_netdev_stats_struct(9)i40e_vsi_reset_stats(9)i40e_pf_reset_stats(9)i40e_compute_pci_to_hw_id(9)i40e_stat_update64(9)i40e_stat_update48(9)i40e_stat_update32(9)i40e_stat_update_and_clear32(9)i40e_stats_update_rx_discards(9)i40e_update_eth_stats(9)i40e_update_veb_stats(9)i40e_update_vsi_stats(9)i40e_update_pf_stats(9)i40e_update_stats(9)i40e_count_all_filters(9)i40e_count_active_filters(9)i40e_find_filter(9)i40e_find_mac(9)i40e_is_vsi_in_vlan(9)i40e_correct_mac_vlan_filters(9)i40e_get_vf_new_vlan(9)i40e_correct_vf_mac_vlan_filters(9)i40e_rm_default_mac_filter(9)i40e_add_filter(9)__i40e_del_filter(9)i40e_add_mac_filter(9)i40e_del_mac_filter(9)i40e_set_mac(9)i40e_config_rss_aq(9)i40e_vsi_config_rss(9)i40e_vsi_setup_queue_map_mqprio(9)i40e_vsi_setup_queue_map(9)i40e_addr_sync(9)i40e_addr_unsync(9)i40e_set_rx_mode(9)i40e_undo_del_filter_entries(9)i40e_undo_add_filter_entries(9)i40e_next_filter(9)i40e_update_filter_state(9)i40e_aqc_del_filters(9)i40e_aqc_add_filters(9)i40e_aqc_broadcast_filter(9)i40e_set_promiscuous(9)i40e_sync_vsi_filters(9)i40e_sync_filters_subtask(9)i40e_calculate_vsi_rx_buf_len(9)i40e_max_vsi_frame_size(9)i40e_change_mtu(9)i40e_vlan_stripping_enable(9)i40e_vlan_stripping_disable(9)i40e_add_vlan_all_mac(9)i40e_vsi_add_vlan(9)i40e_rm_vlan_all_mac(9)i40e_vsi_kill_vlan(9)i40e_vlan_rx_add_vid(9)i40e_vlan_rx_add_vid_up(9)i40e_vlan_rx_kill_vid(9)i40e_restore_vlan(9)i40e_vsi_add_pvid(9)i40e_vsi_remove_pvid(9)i40e_vsi_setup_tx_resources(9)i40e_vsi_free_tx_resources(9)i40e_vsi_setup_rx_resources(9)i40e_vsi_free_rx_resources(9)i40e_config_xps_tx_ring(9)i40e_xsk_pool(9)i40e_configure_tx_ring(9)i40e_rx_offset(9)i40e_configure_rx_ring(9)i40e_vsi_configure_tx(9)i40e_vsi_configure_rx(9)i40e_vsi_config_dcb_rings(9)i40e_set_vsi_rx_mode(9)i40e_reset_fdir_filter_cnt(9)i40e_fdir_filter_restore(9)i40e_vsi_configure(9)i40e_vsi_configure_msix(9)i40e_enable_misc_int_causes(9)i40e_configure_msi_and_legacy(9)i40e_irq_dynamic_disable_icr0(9)i40e_irq_dynamic_enable_icr0(9)i40e_msix_clean_rings(9)i40e_irq_affinity_notify(9)i40e_irq_affinity_release(9)i40e_vsi_request_irq_msix(9)i40e_vsi_disable_irq(9)i40e_vsi_enable_irq(9)i40e_free_misc_vector(9)i40e_intr(9)i40e_clean_fdir_tx_irq(9)i40e_fdir_clean_ring(9)i40e_map_vector_to_qp(9)i40e_vsi_map_rings_to_vectors(9)i40e_vsi_request_irq(9)i40e_netpoll(9)i40e_pf_txq_wait(9)i40e_control_tx_q(9)i40e_control_wait_tx_q(9)i40e_vsi_enable_tx(9)i40e_pf_rxq_wait(9)i40e_control_rx_q(9)i40e_control_wait_rx_q(9)i40e_vsi_enable_rx(9)i40e_vsi_start_rings(9)i40e_vsi_stop_rings(9)i40e_vsi_stop_rings_no_wait(9)i40e_vsi_free_irq(9)i40e_free_q_vector(9)i40e_vsi_free_q_vectors(9)i40e_reset_interrupt_capability(9)i40e_clear_interrupt_scheme(9)i40e_napi_enable_all(9)i40e_napi_disable_all(9)i40e_vsi_close(9)i40e_quiesce_vsi(9)i40e_unquiesce_vsi(9)i40e_pf_quiesce_all_vsi(9)i40e_pf_unquiesce_all_vsi(9)i40e_vsi_wait_queues_disabled(9)i40e_pf_wait_queues_disabled(9)i40e_get_iscsi_tc_map(9)i40e_dcb_get_num_tc(9)i40e_dcb_get_enabled_tc(9)i40e_mqprio_get_enabled_tc(9)i40e_pf_get_num_tc(9)i40e_pf_get_tc_map(9)i40e_vsi_get_bw_info(9)i40e_vsi_configure_bw_alloc(9)i40e_vsi_config_netdev_tc(9)i40e_vsi_update_queue_map(9)i40e_update_adq_vsi_queues(9)i40e_vsi_config_tc(9)i40e_vsi_reconfig_tc(9)i40e_get_link_speed(9)i40e_bw_bytes_to_mbits(9)i40e_set_bw_limit(9)i40e_remove_queue_channels(9)i40e_get_max_queues_for_channel(9)i40e_validate_num_queues(9)i40e_vsi_reconfig_rss(9)i40e_channel_setup_queue_map(9)i40e_add_channel(9)i40e_channel_config_tx_ring(9)i40e_setup_hw_channel(9)i40e_setup_channel(9)i40e_validate_and_set_switch_mode(9)i40e_create_queue_channel(9)i40e_configure_queue_channels(9)i40e_veb_config_tc(9)i40e_dcb_reconfigure(9)i40e_resume_port_tx(9)i40e_suspend_port_tx(9)i40e_hw_set_dcb_config(9)i40e_hw_dcb_config(9)i40e_dcb_sw_default_config(9)i40e_init_pf_dcb(9)i40e_print_link_message(9)i40e_up_complete(9)i40e_vsi_reinit_locked(9)i40e_force_link_state(9)i40e_up(9)i40e_down(9)i40e_validate_mqprio_qopt(9)i40e_vsi_set_default_tc_config(9)i40e_del_macvlan_filter(9)i40e_add_macvlan_filter(9)i40e_reset_ch_rings(9)i40e_free_macvlan_channels(9)i40e_fwd_ring_up(9)i40e_setup_macvlans(9)i40e_fwd_add(9)i40e_del_all_macvlans(9)i40e_fwd_del(9)i40e_setup_tc(9)i40e_set_cld_element(9)i40e_add_del_cloud_filter(9)i40e_add_del_cloud_filter_big_buf(9)i40e_parse_cls_flower(9)i40e_handle_tclass(9)i40e_configure_clsflower(9)i40e_find_cloud_filter(9)i40e_delete_clsflower(9)i40e_setup_tc_cls_flower(9)i40e_open(9)i40e_netif_set_realnum_tx_rx_queues(9)i40e_vsi_open(9)i40e_fdir_filter_exit(9)i40e_cloud_filter_exit(9)i40e_close(9)i40e_do_reset(9)i40e_dcb_need_reconfig(9)i40e_handle_lldp_event(9)i40e_do_reset_safe(9)i40e_handle_lan_overflow_event(9)i40e_get_current_fd_count(9)i40e_get_global_fd_count(9)i40e_reenable_fdir_sb(9)i40e_reenable_fdir_atr(9)i40e_delete_invalid_filter(9)i40e_fdir_check_and_reenable(9)i40e_fdir_flush_and_replay(9)i40e_get_current_atr_cnt(9)i40e_fdir_reinit_subtask(9)i40e_vsi_link_event(9)i40e_veb_link_event(9)i40e_link_event(9)i40e_watchdog_subtask(9)i40e_reset_subtask(9)i40e_handle_link_event(9)i40e_clean_adminq_subtask(9)i40e_verify_eeprom(9)i40e_enable_pf_switch_lb(9)i40e_disable_pf_switch_lb(9)i40e_config_bridge_mode(9)i40e_reconstitute_veb(9)i40e_get_capabilities(9)i40e_fdir_sb_setup(9)i40e_fdir_teardown(9)i40e_rebuild_cloud_filters(9)i40e_rebuild_channels(9)i40e_clean_xps_state(9)i40e_prep_for_reset(9)i40e_send_version(9)i40e_get_oem_version(9)i40e_reset(9)i40e_rebuild(9)i40e_reset_and_rebuild(9)i40e_handle_reset_warning(9)i40e_print_vf_mdd_event(9)i40e_print_vfs_mdd_events(9)i40e_handle_mdd_event(9)i40e_service_task(9)i40e_service_timer(9)i40e_set_num_rings_in_vsi(9)i40e_vsi_alloc_arrays(9)i40e_vsi_mem_alloc(9)i40e_vsi_free_arrays(9)i40e_clear_rss_config_user(9)i40e_vsi_clear(9)i40e_vsi_clear_rings(9)i40e_alloc_rings(9)i40e_reserve_msix_vectors(9)i40e_init_msix(9)i40e_vsi_alloc_q_vector(9)i40e_vsi_alloc_q_vectors(9)i40e_init_interrupt_scheme(9)i40e_restore_interrupt_scheme(9)i40e_setup_misc_vector_for_recovery_mode(9)i40e_setup_misc_vector(9)i40e_get_rss_aq(9)i40e_config_rss_reg(9)i40e_get_rss_reg(9)i40e_config_rss(9)i40e_get_rss(9)i40e_fill_rss_lut(9)i40e_pf_config_rss(9)i40e_reconfig_rss_queues(9)i40e_get_partition_bw_setting(9)i40e_set_partition_bw_setting(9)i40e_is_total_port_shutdown_enabled(9)i40e_sw_init(9)i40e_set_ntuple(9)i40e_clear_rss_lut(9)i40e_set_loopback(9)i40e_set_features(9)i40e_ndo_fdb_add(9)i40e_ndo_bridge_setlink(9)i40e_ndo_bridge_getlink(9)i40e_features_check(9)i40e_xdp_setup(9)i40e_enter_busy_conf(9)i40e_exit_busy_conf(9)i40e_queue_pair_reset_stats(9)i40e_queue_pair_clean_rings(9)i40e_queue_pair_toggle_napi(9)i40e_queue_pair_toggle_rings(9)i40e_queue_pair_enable_irq(9)i40e_queue_pair_disable_irq(9)i40e_queue_pair_disable(9)i40e_queue_pair_enable(9)i40e_xdp(9)i40e_config_netdev(9)i40e_vsi_delete(9)i40e_is_vsi_uplink_mode_veb(9)i40e_add_vsi(9)i40e_vsi_release(9)i40e_vsi_setup_vectors(9)i40e_vsi_reinit_setup(9)i40e_vsi_setup(9)i40e_veb_get_bw_info(9)i40e_veb_mem_alloc(9)i40e_switch_branch_release(9)i40e_veb_clear(9)i40e_veb_release(9)i40e_add_veb(9)i40e_veb_setup(9)i40e_setup_pf_switch_element(9)i40e_fetch_switch_configuration(9)i40e_setup_pf_switch(9)i40e_determine_queue_usage(9)i40e_setup_pf_filter_control(9)i40e_get_platform_mac_addr(9)i40e_set_fec_in_flags(9)i40e_check_recovery_mode(9)i40e_pf_loop_reset(9)i40e_check_fw_empr(9)i40e_handle_resets(9)i40e_init_recovery_mode(9)i40e_set_subsystem_device_id(9)i40e_probe(9)i40e_remove(9)i40e_enable_mc_magic_wake(9)i40e_io_suspend(9)i40e_io_resume(9)i40e_pci_error_detected(9)i40e_pci_error_reset_prepare(9)i40e_pci_error_reset_done(9)i40e_pci_error_resume(9)i40e_shutdown(9)i40e_suspend(9)i40e_resume(9)i40e_init_module(9)i40e_exit_module(9)
that's the whole squad, no gatekeeping π
ngl the takeaway is tiny but real: slot got reset, we check the registers, and if they read back sane we hand back a happy PCI_ERS_RESULT_xxx. that's it, that's the function, she ate and left no crumbs π
and that's a wrap bestie!! this lil' page lives in ./drivers/net/ethernet/intel/i40e, dated October 2026, and it's i40e_pci_error_slot_reset(9) forever and always πβ¨π¦ slay, go read your registers responsibly π
π¦ where this page comes from
- nixpkgs unstable: linux-manual 7.3.1
- π girlified by deepseek-ai/DeepSeek-V4.1-Flash-1017 on : a language model's rewrite of the original, under its terms