cfg80211_s1...art_freq_khz(9)

📦 version 7.3.1, in nixpkgs unstable

💅 cfg80211_s1g_get_start_freq_khz — a whole kernel API moment

okay so first things first bestie: this is a section 9 manual page (that's the Kernel API Manual, the dev-only side of the house, iykyk ✨), and the star of the show is cfg80211_s1g_get_start_freq_khz. yes the header up top got cutely truncated, no it is not a typo, that's just how the man page title renders. the function name is the long one, we move 💅

✨ NAME ✨

cfg80211_s1g_get_start_freq_khz — get S1G chandef start frequency 🦋

like, that's literally the whole job. it gets you the start frequency. that's it, that's the function, and honestly? iconic for knowing exactly what it is 🎀

🌸 SYNOPSIS 🌸

u32 cfg80211_s1g_get_start_freq_khz(const struct cfg80211_chan_def *chandef);

so it's a u32 coming back at you (a nice lil unsigned 32-bit number, no drama), and it takes exactly one thing: a pointer to a const struct cfg80211_chan_def. const, because we are looking, not touching — we respect boundaries in this house 🫶

💖 ARGUMENTS 💖

  • chandef — the chandef to use 💫 that's it. that's the entire argument description. the chandef you hand over is the chandef it works with. give it a chandef, it does chandef things. no cap.

👑 RETURN 👑

it returns the chandef's starting frequency in KHz 🔥 (yes, KHz, kilohertz, not the other ones — read the unit, bestie, the unit is doing important work here).

so the vibe check is: chandef goes in, a u32 starting frequency in KHz comes out, everybody slays, periodt 💅

more of this page is coming btw, we're not done — part 2 is loading 🌈

💅 SEE ALSO 💅

okay bestie, this is the part of the page — the whole friend group. Everything below is a real cross-reference in this manual, and I'm keeping every single one, so grab a snack 🍓 because the list is long and every name matters.

Some of these are whole sections (like Introduction(9)), some are structs, some are enums, some are straight-up functions. All (9) because that's the section, no cap. 💖

🦋 the origin story + the basics

  • the file itself — Kernel file ./include/net/cfg80211.h
  • start here if you're new — Introduction(9), Device registration(9)

🌸 channels, rates, and every capability struct you'll ever meet

these are lowkey the main characters of the band-and-rate lore:

  • enum ieee80211_channel_flags(9), struct ieee80211_channel(9), enum ieee80211_rate_flags(9), enum ieee80211_bss_type(9), enum ieee80211_privacy(9), struct ieee80211_rate(9)
  • struct ieee80211_he_obss_pd(9), struct cfg80211_he_bss_color(9)
  • struct ieee80211_sta_ht_cap(9), struct ieee80211_sta_vht_cap(9), struct ieee80211_sta_he_cap(9), struct ieee80211_eht_mcs_nss_supp(9), struct ieee80211_sta_eht_cap(9), struct ieee80211_sta_uhr_cap(9), struct ieee80211_sband_iftype_data(9)
  • enum ieee80211_edmg_bw_config(9), struct ieee80211_edmg(9), struct ieee80211_sta_s1g_cap(9), struct ieee80211_supported_band(9)

🧚 the sband/iftype helper squad

the "get me the data for this iftype" girlies ✨:

🎀 actions & configuration: the parameter structs

  • struct vif_params(9), struct key_params(9), struct cfg80211_chan_def(9), struct cfg80211_tid_cfg(9), struct cfg80211_tid_config(9), struct cfg80211_fils_aad(9), struct cfg80211_set_hw_timestamp(9)

💜 the chandef cinematic universe

literally the chandef girls, front to back:

🫶 survey, crypto, and all the beacon/AP settings

  • enum survey_info_flags(9), struct survey_info(9), struct cfg80211_crypto_settings(9)
  • struct cfg80211_mbssid_config(9), struct cfg80211_mbssid_elems(9), struct cfg80211_rnr_elems(9)
  • struct cfg80211_beacon_data(9), struct cfg80211_acl_data(9), struct cfg80211_fils_discovery(9), struct cfg80211_unsol_bcast_probe_resp(9), struct cfg80211_s1g_short_beacon(9)
  • struct cfg80211_ap_settings(9), struct cfg80211_ap_update(9), struct cfg80211_csa_settings(9), struct cfg80211_color_change_settings(9)
  • struct iface_combination_params(9), enum station_parameters_apply_mask(9), struct sta_txpwr(9)
  • struct link_station_parameters(9), struct link_station_del_parameters(9), struct cfg80211_ttlm_params(9)
  • struct station_parameters(9), struct station_del_parameters(9), enum cfg80211_station_type(9), cfg80211_check_station_change(9)
  • enum rate_info_flags(9), enum rate_info_bw(9), struct rate_info(9)
  • enum bss_param_flags(9), struct sta_bss_parameters(9)
  • struct cfg80211_txq_stats(9), struct cfg80211_tid_stats(9), struct link_station_info(9), struct station_info(9)

🌈 SAR, monitor, mesh, and OCB

  • struct cfg80211_sar_sub_specs(9), struct cfg80211_sar_specs(9), struct cfg80211_sar_freq_ranges(9), struct cfg80211_sar_capa(9), cfg80211_get_station(9)
  • enum monitor_flags(9), enum mpath_info_flags(9), struct mpath_info(9), enum wiphy_bss_param_flags(9), struct bss_parameters(9)
  • struct mesh_config(9), struct mesh_setup(9), struct ocb_setup(9), struct ieee80211_txq_params(9)
  • then boom 💥 Scanning and BSS list handling(9)

🎀 scanning & BSS lists, plus all the auth/assoc/connect structs

  • struct cfg80211_ssid(9), struct cfg80211_scan_info(9), struct cfg80211_scan_6ghz_params(9), struct cfg80211_scan_request(9), struct cfg80211_match_set(9), struct cfg80211_sched_scan_plan(9), struct cfg80211_bss_select_adjust(9), struct cfg80211_sched_scan_request(9), enum cfg80211_signal_type(9)
  • struct cfg80211_inform_bss(9), struct cfg80211_bss_ies(9), struct cfg80211_bss(9), ieee80211_bss_get_elem(9), ieee80211_bss_get_ie(9)
  • struct cfg80211_auth_request(9), struct cfg80211_assoc_link(9), struct cfg80211_ml_reconf_req(9), enum cfg80211_assoc_req_flags(9), struct cfg80211_assoc_request(9), struct cfg80211_deauth_request(9), struct cfg80211_disassoc_request(9)
  • struct cfg80211_ibss_params(9), struct cfg80211_bss_selection(9), struct cfg80211_connect_params(9)

💖 connect params changes, PMK, wowlan, coalesce, mgmt tx

  • enum cfg80211_connect_params_changed(9), enum wiphy_params_flags(9), struct cfg80211_pmksa(9)
  • struct cfg80211_pkt_pattern(9), struct cfg80211_wowlan_tcp(9), struct cfg80211_wowlan(9), struct cfg80211_coalesce_rules(9), struct cfg80211_coalesce(9), struct cfg80211_wowlan_nd_match(9), struct cfg80211_wowlan_nd_info(9), struct cfg80211_wowlan_wakeup(9)
  • struct cfg80211_gtk_rekey_data(9), struct cfg80211_update_ft_ies_params(9), struct cfg80211_mgmt_tx_params(9)
  • struct cfg80211_dscp_exception(9), struct cfg80211_dscp_range(9), struct cfg80211_qos_map(9)

🧚 NAN, PMK conf, external auth, and PMSR

NAN girlies stand up 🫶 then the measurement crew:

  • Neighbor Awareness Networking (NAN)(9), struct cfg80211_nan_band_config(9), struct cfg80211_nan_conf(9), struct cfg80211_nan_channel(9), struct cfg80211_nan_local_sched(9), struct cfg80211_nan_peer_map(9), struct cfg80211_nan_peer_sched(9), enum cfg80211_nan_conf_changes(9), struct cfg80211_nan_func_filter(9), struct cfg80211_nan_func(9)
  • struct cfg80211_pmk_conf(9), struct cfg80211_external_auth_params(9), struct cfg80211_ftm_responder_stats(9)
  • struct cfg80211_pmsr_ftm_result(9), struct cfg80211_pmsr_result(9), struct cfg80211_pmsr_ftm_request_peer(9), struct cfg80211_pmsr_request_peer(9), struct cfg80211_pmsr_request(9)
  • struct cfg80211_update_owe_info(9), struct mgmt_frame_regs(9)

🔥 cfg80211_ops and the wiphy feature flags

  • struct cfg80211_ops(9), enum wiphy_flags(9), struct ieee80211_iface_limit(9), struct ieee80211_iface_combination(9)
  • enum wiphy_wowlan_support_flags(9), struct wiphy_wowlan_support(9), struct wiphy_coalesce_support(9)
  • enum wiphy_vendor_command_flags(9), enum wiphy_opmode_flag(9), struct sta_opmode_info(9), struct wiphy_vendor_command(9)
  • struct wiphy_iftype_ext_capab(9), cfg80211_get_iftype_ext_capa(9), struct cfg80211_pmsr_capabilities(9), struct wiphy_iftype_akm_suites(9)
  • struct wiphy_radio_cfg(9), struct wiphy_radio_freq_range(9), struct wiphy_radio(9), enum wiphy_nan_flags(9), struct wiphy_nan_capa(9)

👑 wiphy lifecycle: new, register, lock, free, and all the work queues

the whole glow-up-to-glow-down arc, plus the timers 💅:

⭐ utility functions: channel math, header lengths, radiotap

🍓 data path helpers & element finding

🎀 regulatory enforcement & the internal regdb

💜 scan done, BSS informing, BSS refcounting

🫶 mlme mgmt, auth/assoc handling, and RFkill

🌈 vendor commands & test mode

💖 connect/roam/disconnect notifs, mgmt rx/tx, CQM, radar

the big notifier pile, and yes every single one is here 😭:

okay so the cross-reference section is still going, and honestly? she has range. the rest of the SEE ALSO besties, in all their glory, no skips, no cap:

  • cfg80211_reg_check_beaconing — the vibe check for beaconing, right there in the name 🦋
  • cfg80211_reg_can_beacon — "can we beacon tho" energy ✨
  • cfg80211_reg_can_beacon_relax — same question, chiller about it 💅
  • cfg80211_ch_switch_notify — channel switching, but make it a notification 📣
  • cfg80211_ch_switch_started_notify — the "we've started" version, iconic 🌸
  • ieee80211_operating_class_to_band — converting one thing to another, as one does 🔁
  • ieee80211_operating_class_to_chandef — same pipeline, different destination 🎀
  • ieee80211_chandef_to_operating_class — the reverse glow-up, we love a round trip ⭐
  • ieee80211_chandef_to_khz — numbers going to kHz, obviously 🧮
  • cfg80211_tdls_oper_request — TDLS said "let me ask real quick" 🙈
  • cfg80211_calculate_bitrate — math era, lowkey obsessed 🔥
  • cfg80211_unregister_wdev — the un-register bestie, she taketh away 💀
  • cfg80211_register_netdevice — and then she giveth back 🫶
  • cfg80211_unregister_netdevice — taketh away again, sorry 😭
  • struct cfg80211_ft_event_params — a struct, love that for us 👑
  • cfg80211_ft_event — the event itself, main character 💜
  • cfg80211_get_p2p_attr — get that P2P attribute, periodt 🌈
  • ieee80211_ie_split_ric — splitting IEs, with RIC in the mix ✂️
  • ieee80211_ie_split — the plain split, no notes 🍓
  • ieee80211_fragment_element — fragmentation but make it demure 🎀
  • cfg80211_report_wowlan_wakeup — wake-up report, WoWLAN girlies rise 🌅
  • cfg80211_crit_proto_stopped — critical protocol stopped, dramatic as always 😭
  • ieee80211_get_num_supported_channels — counting channels, somebody has to 🧚
  • cfg80211_check_combinations — combinations check, the responsible friend 🫡
  • cfg80211_iter_combinations — same combos, iterator edition 🔁
  • cfg80211_get_radio_idx_by_chan — finding a radio index, detective mode 🔍
  • cfg80211_stop_link — stop that link, respectfully ✋
  • cfg80211_stop_iface — stop that interface too, we're cleaning house 💅
  • cfg80211_shutdown_all_interfaces — ALL of them. absolutely all of them 💀
  • wiphy_ext_feature_set — extended feature: set ✅
  • wiphy_ext_feature_isset — extended feature: is it set though 🤔
  • cfg80211_free_nan_func — NAN func, free her ✨
  • struct cfg80211_nan_match_params — another struct, we stan 🎀
  • cfg80211_nan_match — NAN match, cute 💖
  • cfg80211_nan_func_terminated — terminated, tragic but necessary 😭
  • cfg80211_nan_sched_update_done — schedule update: done, slay 🦋
  • cfg80211_external_auth_request — external auth asked politely 🙈
  • cfg80211_pmsr_report — PMSR report, here's the tea 🍵
  • cfg80211_pmsr_complete — and PMSR complete, fin 🎬
  • cfg80211_iftype_allowed — is the iftype allowed? enquiring minds 🧐
  • cfg80211_assoc_comeback — assoc comeback, she came BACK 💅
  • cfg80211_update_owe_info_event — OWE info update, eventified ✨
  • cfg80211_bss_flush — flush it, cleanse the palette 🌊
  • cfg80211_bss_color_notify — BSS color notification, colorful 🎨
  • cfg80211_obss_color_collision_notify — obss collision, uh oh, notify anyway 😬
  • cfg80211_color_change_started_notify — color change: started 📢
  • cfg80211_color_change_aborted_notify — color change: aborted, it happens 😭
  • cfg80211_color_change_notify — color change: just notify 🔔
  • cfg80211_6ghz_power_type — 6GHz power type, very current 💜
  • cfg80211_links_removed — links removed, gone girl 💀
  • struct cfg80211_mlo_reconf_done_data — MLO reconf data struct, king 👑
  • cfg80211_mlo_reconf_add_done — MLO reconf add: done ✅
  • cfg80211_schedule_channels_check — schedule that channel check, calendar girl 🗓️
  • cfg80211_epcs_changed — EPCS changed, noted 📝
  • cfg80211_next_nan_dw_notif — next NAN DW notification, coming soon ⏭️
  • cfg80211_nan_cluster_joined — joined the cluster, we're in 🌸
  • cfg80211_nan_ulw_update — ULW update, fresh 🦋
  • cfg80211_nan_channel_evac — channel evac, everybody out 🚪
  • wiphy_locked_debugfs_read — debugfs read, but locked 🔒
  • wiphy_locked_debugfs_write — debugfs write, also locked, rules are rules 🔐
  • cfg80211_s1g_get_end_freq_khz — S1G end freq in kHz, the sequel 🎬
  • cfg80211_s1g_get_primary_sibling — primary sibling, family reunion 🫶
  • cfg80211_incumbent_signal_notify — incumbent signal, she has an announcement 📣

and that's the whole list, every last one, nothing cut, nothing merged, nothing invented. go click through them if you're nosy, i support it 💖

a lil sign-off 🎀 — this page lives over in ./include/net, and it's dated October 2026, filed under the very same cfg80211_s1...art_freq_khz(9) title you've been reading this whole time. mwah, go read some kernel source, ily 💅✨

📦 where this page comes from