STRUCT IWL_FW(9)

✨ struct iwl_fw(9) ✨

okay bestie, gather round, because this is the struct iwl_fw page from the Kernel API Manual and it's literally the whole vibe closet for the firmware 💖 like every variable the firmware needs to be its main character lives in here.

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🌸 NAME 🌸

struct iwl_fw — variables associated with the firmware

like, all the firmware's little accessories and IDs and secret diary entries, bundled into one struct 🎀

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🦋 SYNOPSIS 🦋

no cap, here's the whole thing, character for character, don't touch it:

struct iwl_fw {
    u32 ucode_ver;
    char fw_version[128];
    struct fw_img img[IWL_UCODE_TYPE_MAX];
    size_t iml_len;
    u8 *iml;
    struct iwl_ucode_capabilities ucode_capa;
    bool enhance_sensitivity_table;
    u32 init_evtlog_ptr, init_evtlog_size, init_errlog_ptr;
    u32 inst_evtlog_ptr, inst_evtlog_size, inst_errlog_ptr;
    struct iwl_tlv_calib_ctrl default_calib[IWL_UCODE_TYPE_MAX];
    u32 phy_config;
    u8 valid_tx_ant;
    u8 valid_rx_ant;
    enum iwl_fw_type type;
    u8 human_readable[FW_VER_HUMAN_READABLE_SZ];
    struct iwl_fw_dbg dbg;
    u8 *phy_integration_ver;
    u32 phy_integration_ver_len;
    struct iwl_dump_exclude dump_excl[2], dump_excl_wowlan[2];
    const void *pnvm_data;
    u32 pnvm_size;
 };

she's long, she's gorgeous, she's giving "I memorized the whole seating chart" energy 👑

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👑 Members 👑

okay so member by member, let's go, no skipping, we do not skip in this house 💅

• ucode_ver — the ucode version, straight out of the ucode file fr fr
• fw_version — the firmware version string, her little name tag 🏷️
• img — the ucode image(s), like ucode_rt, ucode_init, ucode_wowlan. three besties, one field.
• iml_len — length of the image loader image (just the length, not the image itself, she's the measuring tape 📏)
• iml — the image loader fw image itself, the actual thing
• ucode_capa — capabilities parsed from the ucode file, i.e. what she can actually do 💪
• enhance_sensitivity_table — bool, tells you the device can do enhanced sensitivity ✨ (yes, sensitivity, she's in her feelings)
• init_evtlog_ptr — event log offset for init ucode
• init_evtlog_size — event log size for init ucode
• init_errlog_ptr — error log offset for init ucode
• inst_evtlog_ptr — event log offset for runtime ucode
• inst_evtlog_size — event log size for runtime ucode
• inst_errlog_ptr — error log offset for runtime ucode 🫶 (init versions above, runtime versions here, keep them straight)
• default_calib — default calibration data, the factory settings of it all
• phy_config — PHY configuration flags 🚩
• valid_tx_ant — valid TX antenna bitmap
• valid_rx_ant — valid RX antenna bitmap (tx gets one, rx gets one, equality, slay)
• type — firmware type, and it's an enum iwl_fw_type
• human_readable — the human readable version we get from the ALIVE from the uCode 🧚 like she translated it for us so we don't have to
• dbg — debug data, see struct iwl_fw_dbg 🔍
• phy_integration_ver — PHY integration version string
• phy_integration_ver_len — length of phy_integration_ver (yes, she has a matching length field, it's a matching set, we love consistency)
• dump_excl — image dump exclusion areas for the RT image
• dump_excl_wowlan — image dump exclusion areas for the WoWLAN image 😴
• pnvm_data — PNVM data embedded in the .ucode file, if any (if any!! sometimes there isn't, don't assume)
• pnvm_size — size of the embedded PNVM data

no invented lore up in here, every one of those is straight from the source. if it's not listed above, it's not a member. periodt 💀

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🔥 SEE ALSO 🔥

go read these next, they're the friend group:

• Kernel file ./drivers/net/wireless/intel/iwlwifi/fw/img.h enum
• iwl_ucode_type(9)
• struct iwl_fw_paging(9)
• enum iwl_fw_type(9)
• struct iwl_fw_dbg(9)

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and that's the whole page bestie, you ate that 🍓

sign-off era: this glorious artifact comes to you from ./drivers/net/wireless/intel/i... and it's dated October 2026 — a whole little time capsule, and honestly? iconic 💜