STRUCT IWL_FW_ERROR_DUMP_FIFO(9)

💅 struct iwl_fw_error_dump_fifo(9) — like, the Kernel API Manual obviously 🎀

okay bestie, gather round, because today we're looking at struct iwl_fw_error_dump_fifo, and it's literally the blueprint for RX/TX FIFO data. yes, that FIFO. the dump-adjacent one. this is from the Kernel API Manual, and no cap, it's giving "small struct, big responsibilities". ✨

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🌸 NAME 🌸

struct iwl_fw_error_dump_fifo — RX/TX FIFO data. that's it, that's the whole vibe. 🦋

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✨ SYNOPSIS ✨

struct iwl_fw_error_dump_fifo {
    __le32 fifo_num;
    __le32 available_bytes;
    __le32 wr_ptr;
    __le32 rd_ptr;
    __le32 fence_ptr;
    __le32 fence_mode;
    u8 data[];
 };

look at her. six __le32s and one flexible u8 array, living her best life. iconic. 👑

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💖 Members 💖

so like, here's the whole cast, ok? every single one of them matters, don't skip:

• fifo_num — which FIFO we're talking about, and bestie, the numbering starts from 0. zero-indexed, the way it should be. 🍓
• available_bytes — the number of bytes actually available in the FIFO. and listen, highkey important: this may be less than the FIFO size. do not assume it's the full thing, i'm begging. 😭
• wr_ptr — the position of the write pointer. where the writing is happening. periodt. ✍️
• rd_ptr — the position of the read pointer. where the reading is happening. 💅
• fence_ptr — the position of the fence pointer. yes, there's a fence. there's always a fence. 🚧
• fence_mode — the current mode of the fence, and this is before locking, ok, so clock that: 0 = follow RD pointer ; 1 = freeze. two modes, no in-between, iykyk. 🧊
• data — all of the FIFO's data. every last byte of it. the whole thing. the main character. 🌈

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🦋 SEE ALSO 🦋

okay this list is LONG but every single one is here, don't come for me:

• Kernel file ./drivers/net/wireless/intel/iwlwifi/fw/error-dump.h enum iwl_fw_error_dump_type(9)
• struct iwl_fw_error_dump_data(9)
• struct iwl_dump_file_name_info(9)
• struct iwl_fw_error_dump_file(9)
• struct iwl_fw_error_dump_txcmd(9)
• struct iwl_fw_error_dump_info(9)
• struct iwl_fw_error_dump_fw_mon(9)
• struct iwl_fw_error_dump_smem_cfg(9)
• struct iwl_fw_error_dump_prph(9)
• struct iwl_fw_error_dump_mem(9)
• struct iwl_fw_ini_error_dump_data(9)
• struct iwl_fw_ini_dump_file_hdr(9)
• struct iwl_fw_ini_fifo_hdr(9)
• struct iwl_fw_ini_error_dump_range(9)
• struct iwl_fw_ini_error_dump_header(9)
• struct iwl_fw_ini_error_dump(9)
• struct iwl_fw_ini_error_dump_register(9)
• struct iwl_fw_ini_dump_cfg_name(9)
• struct iwl_fw_ini_err_table_dump(9)
• struct iwl_fw_error_dump_rb(9)
• struct iwl_fw_ini_monitor_dump(9)
• struct iwl_fw_ini_special_device_memory(9)
• struct iwl_fw_error_dump_paging(9)
• iwl_fw_error_next_data(9)
• enum iwl_fw_dbg_trigger(9)
• struct iwl_fw_error_dump_trigger_desc(9)

like… that's the whole squad. read them all, or at least the ones you need. 🫶

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and that's the page, bestie!! source is ./drivers/net/wireless/intel/i..., dated October 2026, and yes it's still filed under struct iwl_...or_dump_fifo(9) because the title bar simply refuses to show the whole name. slay. 💜🌸✨