STRUCT IWL_RX_MPDU_DESC_V1(9)

💅 struct iwl_rx_mpdu_desc_v1(9) — like, the RX MPDU descriptor, bestie 🎀

okay so this is a page straight outta the Kernel API Manual (struct iwl_rx_mpdu_desc_v1(9)), and yes it's a C struct, and yes it's giving very much "wireless driver internals" energy. buckle up 🦋

---

✨ NAME ✨

struct iwl_rx_mpdu_desc_v1 — the RX MPDU descriptor. that's it, that's the name, no cap 💖

---

🔥 SYNOPSIS 🔥

here's the whole shape of her, literally copy-paste sacred, do not touch:

struct iwl_rx_mpdu_desc_v1 {
    union {
      __le32 rss_hash;
      __le32 phy_data2;
    };
    union {
      __le32 filter_match;
      __le32 phy_data3;
    };
    __le32 rate_n_flags;
    u8 energy_a;
    u8 energy_b;
    u8 channel;
    u8 mac_context;
    __le32 gp2_on_air_rise;
    union {
      __le64 tsf_on_air_rise;
      struct {
        __le32 phy_data0;
        __le32 phy_data1;
      };
    };
 };

---

🧚 Members 🧚

so there's a bunch of anonymous unions in here and honestly the manpage just labels them {unnamed_union} and says anonymous. iconic, unbothered, no notes 💀 three of those bad boys, plus one {unnamed_struct} that's also just… anonymous. main character energy, refuses to be named 😭

🌸 first union — the little anonymous one

• rss_hash — the RSS hash value, slay 💜
• phy_data2 — depends on info type (peep phy_data1 for the deets) 👀

🌈 second union — also anonymous, also mysterious

• filter_match — the filter match value ✨
• phy_data3 — again, depends on info type (see phy_data1) 🫶

⭐ the straightforward ones

• rate_n_flags — the RX rate/flags encoding, this is where the rate info lives 🔥
• energy_a — energy, chain A ⚡
• energy_b — energy, chain B ⚡⚡ (twins!)
• channel — the channel number 📡
• mac_context — the MAC context mask 🎭
• gp2_on_air_rise — the GP2 timer value on air rise (INA) ⏱️

🦋 third union — the one with the actual lore

• tsf_on_air_rise — the TSF value on air rise (INA). ⚠️ but bestie listen: this one is only valid if IWL_RX_MPDU_PHY_TSF_OVERLOAD isn't set. if that flag IS set, this field is not your girl, okay? 💅

🍓 and nested inside that union, a struct (also anonymous 💀)

• phy_data0 — depends on info_type, see phy_data1 🙈
• phy_data1 — valid only if IWL_RX_MPDU_PHY_TSF_OVERLOAD is set, and then you gotta check see enum iwl_rx_phy_common_data1 or enum iwl_rx_phy_he_data1 or enum iwl_rx_phy_eht_data1. three whole enums, pick your fighter 👑

🎀 vibe check: two fields in this struct are gated on IWL_RX_MPDU_PHY_TSF_OVERLOAD and they're gated in opposite directions. tsf_on_air_rise wants the flag OFF, phy_data1 wants it ON. don't mix them up or it's giving undefined vibes 😭

---

👑 SEE ALSO 👑

the whole extended friend group, from the kernel file ./drivers/net/wireless/intel/iwlwifi/fw/api/rx.h:

• struct iwl_rx_phy_info(9)
• struct iwl_rx_mpdu_res_start(9)
• enum iwl_rx_phy_flags(9)
• enum iwl_mvm_rx_status(9)
• struct iwl_rx_mpdu_desc_v3(9)
• struct iwl_rx_mpdu_desc(9)
• struct iwl_rx_no_data(9)
• struct iwl_rx_no_data_ver_3(9)
• enum iwl_bar_frame_release_sta_tid(9)
• enum iwl_bar_frame_release_ba_info(9)
• struct iwl_bar_frame_release(9)
• struct iwl_rss_config_cmd(9)
• struct iwl_rxq_sync_cmd(9)
• struct iwl_rxq_sync_notification(9)
• enum iwl_mvm_pm_event(9)
• struct iwl_mvm_pm_state_notification(9)
• struct iwl_ba_window_status_notif(9)
• struct iwl_rfh_queue_data(9)
• struct iwl_rfh_queue_config(9)
• struct iwl_beacon_filter_notif_v1(9)
• struct iwl_beacon_filter_notif(9)
• struct iwl_rx_phy_air_sniffer_ntfy(9)

---

and that's the whole page, bestie!! no crumbs left, every flag and field accounted for 🫶

kisses from the source file ./drivers/net/wireless/intel/i..., dated October 2026, brought to you by struct iwl_rx_mpdu_desc_v1(9) — she's the Kernel API Manual's finest, periodt 💜✨🎀