STRUCT IWL_CMD_HEADER_WIDE(9)

💖 struct iwl_cmd_header_wide(9) 💖

okay so bestie, welcome to the Kernel API Manual — this is the page for struct iwl_cmd_header_wide, aka the wide command header, and honestly? it's giving main character energy in the wireless firmware world. let's get into it 🫶

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✨ SYNOPSIS ✨

struct iwl_cmd_header_wide {
    u8 cmd;
    u8 group_id;
    __le16 sequence;
    __le16 length;
    u8 reserved;
    u8 version;
 };

like, look at that lil struct. precious. iconic. no notes. 💅

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🎀 Members 🎀

• cmd — the command ID, like in struct iwl_cmd_header. same vibe, different struct bestie.
• group_id — the group ID, like in struct iwl_cmd_header. again, matching energy.
• sequence — the sequence, like in struct iwl_cmd_header. yep, it's a matching set, we love consistency ✨
• length — literally the length of the command. that's it. that's the field.
• reserved — reserved 👀 (don't touch it, it's reserved, iykyk)
• version — the command version. spicy metadata, love that for us.

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🌸 Description 🌸

so here's the tea: this header format shows up at the beginning of each command sent from the driver, AND at the beginning of each response/notification received from uCode. every single one. it's the little name tag at the top of the message, fr fr.

and this one specifically is the wide version — the deluxe edition 💅 — which contains more information about the command, like the length, the version and the command type. more info, more slay. the way that a wider header just holds extra details? obsessed. 🦋

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👑 SEE ALSO 👑

• Kernel file ./drivers/net/wireless/intel/iwlwifi/fw/api/cmdhdr.h — go read the source bestie, it's all in there 📖
• Host command section(9)
• struct iwl_cmd_header(9)
• struct iwl_calib_res_notif_phy_db(9)
• struct iwl_phy_db_cmd(9)
• struct iwl_cmd_response(9)

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lowkey a whole friend group of structs. go say hi to all of them. 💜

and that's the page! sign-off time 🎀 this one came from the source file ./drivers/net/wireless/intel/i..., dated October 2026, and it's all about struct iwl_cmd_header_wide(9). periodt. 💖✨