STRUCT HAM_START_MESSAGE_RES(9)

✨ struct ham_start_message_res — Kernel API Manual ✨

okay bestie, welcome to the struct ham_s..._message_res(9) page 💅 yeah the title's got that ellipsis thing going on, that's just how the kernel manual labels it, don't come for me.

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🎀 NAME 🎀

struct ham_start_message_res — it's the start message response, that's the whole vibe. it's giving "the reply you get back when a start message went out" 🦋

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🌸 SYNOPSIS 🌸

here's the literal struct, character for character, no cap:

struct ham_start_message_res {
    struct ham_bus_message header;
    u16 fw_version[4];
    u16 supported_version;
    u8 heci_capabilities_length;
    u8 heci_capabilities[];
};

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💖 Members 💖

• header — the bus message header, and it's specifically HAM_BUS_CMD_START_RSP. that's your "this is a start response" label, periodt 💅
• fw_version — firmware version, and it comes in as four u16 blocks. four. like a little squad of version numbers 🫶
• supported_version — the supported protocol version, one u16, short and sweet ✨
• heci_capabilities_length — how long the protocol capabilities data is, measured in bytes (u8, so keep it smol) 🍓
• heci_capabilities — the actual protocol capabilities data. flexible array member, so it's whatever length heci_capabilities_length says it is. main character energy, honestly 👑

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🦋 SEE ALSO 🦋

• Kernel file ./drivers/misc/issei/hw_msg.h struct
• ham_setup_shared_memory_req(9)
• struct ham_setup_shared_memory_res(9)
• struct control_buffer(9)
• struct ham_message_header(9)
• struct ham_bus_message(9)
• struct ham_start_message_req(9)
• struct ham_get_clients_req(9)
• struct ham_client_properties(9)
• struct ham_get_clients_res(9)

like, go read those too, they're all in the same friend group iykyk 🌈

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ngl the heci_capabilities[] bit is a flexible array member, so the length field is literally the only thing keeping you from reading past the end. respect it 🙈

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and that's the page, bestie 💜 this one lives in ./drivers/misc/issei, dated October 2026, and yeah the footer still calls it struct ham_s..._message_res(9) — iconic, we love a consistent header. slay 🎀🔥