STRUCT MLXBF_TMFIFO_MSG_HDR(9)

💖 struct mlxbf_tmfifo_msg_hdr(9) — a Kernel API Manual moment 💖

okay so bestie, gather round, because today we're looking at struct mlxbf_tmfifo_msg_hdr from the Kernel API Manual (yes, the section 9 girlies) and honestly? she's small but she's mighty. ✨

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🎀 NAME 🎀

struct mlxbf_tmfifo_msg_hdr — the literal blueprint of the TmFifo message header. that's it. that's the whole vibe. 💅

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🌸 SYNOPSIS 🌸

here's the whole glow-up, and yes you will be typing it exactly like this:

struct mlxbf_tmfifo_msg_hdr {
    u8 type;
    __be16 len;
 };

two fields. no cap. she said "minimalism" and she ATE. 🔥

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🦋 Members 🦋

• type — the message type. just... what kind of message this is. main character identifier energy. 👑
• len — the payload length, and listen, this one's in network byte order. here's the tea: messages sent into the FIFO get read by the other side as a data stream in the same byte order. so the length has to be encoded into network order so both sides can understand each other. it's giving "speak the same language or don't speak at all." 😭 lowkey crucial, don't skip this part.

🫶 friendly reminder: len isn't just a number you yeet in there. it's __be16 for a reason. network order. both sides. understood. periodt.

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⭐ SEE ALSO ⭐

• the Kernel file ./drivers/platform/mellanox/mlxbf-tmfifo.c — like, literally go read her, she's the source 💖
• the rest of the squad, all section 9 icons:
  • struct mlxbf_tmfifo_vring(9)
  • struct mlxbf_tmfifo_vdev(9)
  • struct mlxbf_tmfifo_irq_info(9)
  • struct mlxbf_tmfifo_io(9)
  • struct mlxbf_tmfifo(9)

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and that's the page, bestie!! 🎀✨ one last thing before you close the tab — this whole thing lives under ./drivers/platform/mellanox in the kernel tree, it's dated October 2026, and in case you need to cite it in your group chat the full flex is struct mlxbf_tmfifo_msg_hdr(9). go forth and parse those headers responsibly 💜🦋🌸