STRUCT SLIM_MSG_TXN(9)

💌 NAME

struct slim_msg_txn — the actual message your controller sends out 🚀 it's got the packet header, the payload, and a buffer that still needs filling (if there even is one), all bundled up in one struct 💅

✨ SYNOPSIS

struct slim_msg_txn {
    u8 rl;
    u8 mt;
    u8 mc;
    u8 dt;
    u16 ec;
    u8 tid;
    u8 la;
    struct slim_val_inf     *msg;
    struct completion      *comp;
 };

🫶 MEMBERS

okay bestie, field by field, no skips 👑

• rl — header field, and it's the remaining length. yes, remaining length, that's the whole vibe 🎀
• mc — header field, the message type. literally what kind of message this is ✨
• mc — header field. its LSB is the message code for the type mt. lowkey the most important bit of the header ngl 💅
• dt — header field, destination type. where this thing is headed 🦋
• ec — element code. this one's for the elemental access APIs 🌸
• tid — transaction ID, used for messages that expect a response (relevant for message codes involving a read operation). think of it as the group-chat thread ID so the reply knows where to land 📲
• la — logical address of the device this message is going to. quick note: it is not used when the destination type is broadcast 🫶
• msg — the elemental access message that gets read or written. the actual payload, the main character 💖
• comp — the completion, if the read/write is synchronous. it's used internally for tid-based transactions 🔥

fr fr just remember: header fields up top, payload and completion down below, and broadcast doesn't care about la at all 🙈

👀 SEE ALSO

kernel file ./drivers/slimbus/slimbus.h, plus the whole slim squad, go say hi 👋: struct slim_framer(9), enum slim_clk_state(9), struct slim_sched(9), enum slim_port_direction(9), enum slim_port_state(9), enum slim_channel_state(9), enum slim_ch_data_fmt(9), enum slim_ch_aux_bit_fmt(9), struct slim_channel(9), struct slim_port(9), enum slim_transport_protocol(9), struct slim_stream_runtime(9), struct slim_controller(9)

and that's the page, bestie 🧚💜 this whole thing lives over in ./drivers/slimbus and it's dated October 2026 — slay, go build something iconic 🌈⭐