STRUCT IWL_TOF_RANGE_RSP_AP_ENTRY_NTFY_V3(9)

💅 struct iwl_tof_range_rsp_ap_entry_ntfy_v3(9) — the Kernel API Manual era 🎀

okay so bestie, welcome to the Kernel API Manual ✨ and today's main character is struct iwl_tof_range_rsp_ap_entry_ntfy_v3. yes the name is a whole mouthful, we love her anyway 🫶

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💖 NAME 💖

struct iwl_tof_range_rsp_ap_entry_ntfy_v3 — AP parameters (response). that's it, that's the vibe check: it's the AP params coming back at you in the response direction 👑

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✨ SYNOPSIS ✨

struct iwl_tof_range_rsp_ap_entry_ntfy_v3 {
    u8 bssid[ETH_ALEN];
    u8 measure_status;
    u8 measure_bw;
    __le32 rtt;
    __le32 rtt_variance;
    __le32 rtt_spread;
    s8 rssi;
    u8 rssi_spread;
    u8 reserved;
    u8 refusal_period;
    __le32 range;
    __le32 range_variance;
    __le32 timestamp;
    __le32 t2t3_initiator;
    __le32 t1t4_responder;
    __le16 common_calib;
    __le16 specific_calib;
    __le32 papd_calib_output;
};

like, look at her. seventeen fields of pure FTM measurement goodness, no cap 💅

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🌸 Members 🌸

get comfy, we're going field by field, and yes every single one matters 🙈

• bssid — the BSSID of the AP. her name tag at the party 🎀
• measure_status — the current AP's measurement status, one of enum iwl_tof_entry_status. literally the "how did it go" field 🦋
• measure_bw — current AP Bandwidth: 0 20MHz, 1 40MHz, 2 80MHz. pick your lane, bestie 🌈
• rtt — The Round Trip Time that took for the last measurement for current AP [pSec]. note the units, that's picoseconds, she's precise 💀
• rtt_variance — The Variance of the RTT values measured for current AP. how much the numbers are doing their own thing 😭
• rtt_spread — The Difference between the maximum and the minimum RTT values measured for current AP in the current session [pSec]. highkey the range of the range, iconic 🔥
• rssi — RSSI as uploaded in the Channel Estimation notification. signal vibes, received and recorded ⭐
• rssi_spread — The Difference between the maximum and the minimum RSSI values measured for current AP in the current session. same energy, but for RSSI 🍓
• reserved — reserved. she's just standing there. mysterious. we respect her 🧚
• refusal_period — refusal period in case of IWL_TOF_ENTRY_RESPONDER_CANNOT_COLABORATE [sec]. yes that's how the constant is spelled in the kernel, we don't make the rules 💀 that's the AP saying "can't collab rn", and this is how long she's booked 🎀
• range — Measured range [cm]. the whole point, honestly 👑
• range_variance — Measured range variance [cm]. the range's own little wobble 🙈
• timestamp — The GP2 Clock [usec] where Channel Estimation notification was uploaded by the LMAC. the receipts, time-stamped 💅
• t2t3_initiator — as calculated from the algo in the initiator. initiator math, initiator business 🔥
• t1t4_responder — as calculated from the algo in the responder. responder math, responder business 🦋
• common_calib — Calib val that was used in for this AP measurement. yes, "in for", that's the original wording bestie, we're preserving the lore 🫶
• specific_calib — val that was used in for this AP measurement. the specific one. the one that's, y'know, specific ✨
• papd_calib_output — The result of the tof papd calibration that was injected into the algorithm. the calibration went into the algorithm and honestly it ate 💜

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👑 SEE ALSO 👑

the whole friend group, fr fr — and yes, the kernel file they all live in:

• Kernel file ./drivers/net/wireless/intel/iwlwifi/fw/api/location.h

then the icons themselves 🌟:

• enum iwl_location_subcmd_ids(9)
• enum iwl_location_frame_format(9)
• enum iwl_location_bw(9)
• enum iwl_location_format_bw(9)
• struct iwl_tof_config_cmd(9)
• enum iwl_tof_bandwidth(9)
• enum iwl_tof_responder_cmd_valid_field(9)
• enum iwl_tof_responder_cfg_flags(9)
• struct iwl_tof_responder_config_cmd_v6(9)
• struct iwl_tof_responder_config_cmd_v7(9)
• struct iwl_tof_responder_config_cmd_v8(9)
• struct iwl_tof_responder_config_cmd_v9(9)
• struct iwl_tof_responder_config_cmd(9)
• struct iwl_tof_responder_dyn_config_cmd_v2(9)
• enum iwl_responder_dyn_cfg_valid_flags(9)
• struct iwl_tof_responder_dyn_config_cmd(9)
• struct iwl_tof_range_req_ext_cmd(9)
• enum iwl_tof_location_query(9)
• enum iwl_initiator_ap_flags(9)
• struct iwl_tof_range_req_ap_entry_v3(9)
• struct iwl_tof_range_req_ap_entry_v4(9)
• enum iwl_location_cipher(9)
• struct iwl_tof_range_req_ap_entry_v6(9)
• struct iwl_tof_range_req_ap_entry_v7(9)
• struct iwl_tof_range_req_ap_entry_v8(9)
• struct iwl_tof_range_req_ap_entry_v9(9)
• struct iwl_tof_range_req_ap_entry(9)
• enum iwl_tof_response_mode(9)
• enum iwl_tof_initiator_flags(9)
• struct iwl_tof_range_req_cmd_v5(9)
• struct iwl_tof_range_req_cmd_v7(9)
• struct iwl_tof_range_req_cmd_v8(9)
• struct iwl_tof_range_req_cmd_v9(9)
• struct iwl_tof_range_req_cmd_v11(9)
• struct iwl_tof_range_req_cmd_v12(9)
• struct iwl_tof_range_req_cmd_v13(9)
• struct iwl_tof_range_req_cmd(9)
• enum iwl_tof_entry_status(9)
• struct iwl_tof_range_rsp_ap_entry_ntfy_v4(9)
• struct iwl_tof_range_rsp_ap_entry_ntfy_v5(9)
• struct iwl_tof_range_rsp_ap_entry_ntfy_v7(9)
• struct iwl_tof_range_rsp_ap_entry_ntfy(9)
• enum iwl_tof_response_status(9)
• struct iwl_tof_range_rsp_ntfy_v5(9)
• struct iwl_tof_range_rsp_ntfy_v6(9)
• struct iwl_tof_range_rsp_ntfy_v7(9)
• struct iwl_tof_range_rsp_ntfy_v9(9)
• struct iwl_tof_range_rsp_ntfy(9)
• struct iwl_tof_mcsi_notif(9)
• struct iwl_tof_range_abort_cmd(9)
• struct iwl_ftm_responder_stats(9)

like, that's the whole gc and every single one of them is invited 🫶

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ngl bestie, this is kernel struct documentation, so nothing here is going to hold your hand — it's just the field-by-field truth as written 🎀

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and that's the page!! sign-off time: this came out of ./drivers/net/wireless/intel/i... , dated October 2026, and it's filed under struct iwl_...ntry_ntfy_v3(9) 🌸 mwah, go read the header file, ily 💖