STRUCT IWL_TX_RESP_V3(9)

💅 struct iwl_tx_resp_v3(9) — a Kernel API Manual moment

okay so bestie, welcome to the Kernel API Manual, and buckle up because we're about to vibe-check a struct that literally just tells you "hey, firmware is TXing a packet rn." That's it. That's the whole personality. It's REPLY_TX = 0x1c, and it ate. 🦋

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✨ NAME ✨

struct iwl_tx_resp_v3 — notifies that fw is TXing a packet ( REPLY_TX = 0x1c ) 💌

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🎀 SYNOPSIS 🎀

no cap, here's the whole glow-up, copied verbatim because we do not mess with the source:

struct iwl_tx_resp_v3 {
    u8 frame_count;
    u8 bt_kill_count;
    u8 failure_rts;
    u8 failure_frame;
    __le32 initial_rate;
    __le16 wireless_media_time;
    u8 pa_status;
    u8 pa_integ_res_a[3];
    u8 pa_integ_res_b[3];
    u8 pa_integ_res_c[3];
    __le16 measurement_req_id;
    u8 reduced_tpc;
    u8 reserved;
    __le32 tfd_info;
    __le16 seq_ctl;
    __le16 byte_cnt;
    u8 tlc_info;
    u8 ra_tid;
    __le16 frame_ctrl;
    struct agg_tx_status status[];
};

look at her. main character struct energy, honestly. 👑

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🌸 Members 🌸 (the whole friend group)

• frame_count — 1 means no aggregation, >1 means aggregation. she's doing a headcount bestie 💀
• bt_kill_count — num of times blocked by bluetooth (unused for agg). bluetooth really said "not today" 🙈
• failure_rts — num of failures due to unsuccessful RTS
• failure_frame — num failures due to no ACK (unused for agg). ghosted by the ACK, tragic 😭
• initial_rate — for non-agg: rate of the successful Tx. For agg: rate of the Tx of all the batch. RATE_MCS_*
• wireless_media_time — for non-agg: RTS + CTS + frame tx attempts time + ACK. for agg: RTS + CTS + aggregation tx time + block-ack time. in usec. it's giving stopwatch energy ⏱️
• pa_status — tx power info
• pa_integ_res_a — tx power info
• pa_integ_res_b — tx power info
• pa_integ_res_c — tx power info

the way pa_integ_res_a, pa_integ_res_b, and pa_integ_res_c are all just "tx power info"… triplets. iconic. they're a matched set 🎀

• measurement_req_id — tx power info
• reduced_tpc — transmit power reduction used
• reserved — reserved. she's reserved. literally in her reserved era 💅
• tfd_info — TFD information set by the FH
• seq_ctl — sequence control from the Tx cmd
• byte_cnt — byte count from the Tx cmd
• tlc_info — TLC rate info
• ra_tid — bits [3:0] = ra, bits [7:4] = tid. bit-packing queen fr fr ⭐
• frame_ctrl — frame control
• status — for non-agg: frame status TX_STATUS_* for agg: status of 1st frame, AGG_TX_STATE_*; other frame status fields follow this one, up to frame_count. Length in frame_count. she's flexible, she's a whole array, she contains multitudes 🫶

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💖 Description 💖

After the array of statuses comes the SSN of the SCD. Look at iwl_mvm_get_scd_ssn for more details. that's the plot twist bestie, there's more data hiding after the status array 👀

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🌈 SEE ALSO 🌈

Kernel file ./drivers/net/wireless/intel/iwlwifi/fw/api/tx.h — and the entire extended universe, alphabetically unhinged, all here:

• enum iwl_tx_flags(9)
• enum iwl_tx_cmd_flags(9)
• enum iwl_tx_pm_timeouts(9)
• enum iwl_tx_cmd_sec_ctrl(9)
• enum iwl_tx_offload_assist_flags_pos(9)
• struct iwl_tx_cmd_v6_params(9)
• struct iwl_tx_cmd_v6(9)
• struct iwl_tx_cmd_v9(9)
• struct iwl_tx_cmd(9)
• struct agg_tx_status(9)
• struct iwl_tx_resp(9)
• struct iwl_mvm_ba_notif(9)
• struct iwl_compressed_ba_tfd(9)
• struct iwl_compressed_ba_ratid(9)
• struct iwl_compressed_ba_notif(9)
• struct iwl_mac_beacon_cmd_v6(9)
• struct iwl_mac_beacon_cmd_v7(9)
• struct iwl_mac_beacon_cmd(9)
• struct iwl_extended_beacon_notif_v5(9)
• struct iwl_extended_beacon_notif(9)
• enum iwl_dump_control(9)
• struct iwl_tx_path_flush_cmd_v1(9)
• struct iwl_tx_path_flush_cmd(9)
• struct iwl_flush_queue_info(9)
• struct iwl_tx_path_flush_cmd_rsp(9)
• struct iwl_scd_txq_cfg_cmd(9)
• struct iwl_scd_txq_cfg_rsp(9)

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okay that's the whole page bestie, you're officially fluent in iwl_tx_resp_v3 🧚💜

and for the cute sign-off: this absolute baddie of a reference lives at ./drivers/net/wireless/intel/i... and it's dated October 2026, filed under struct iwl_tx_resp_v3(9) — slay, go read it, periodt. 🔥👑