mei_hbm_write_message(9)

📦 version 7.3.1, in nixpkgs unstable

💅 mei_hbm_write_message — a Kernel API Manual moment

okay so this page is mei_hbm_write_message(9), straight out of the Kernel API Manual, and honestly? it's a little baby wrapper function and i'm obsessed with how unbothered it is. bestie, let me put you on. 🫶

✨ NAME ✨

mei_hbm_write_message — literally just a wrapper for sending hbm messages. that's it. that's the whole vibe. no cap. 🌸

🦋 SYNOPSIS 🦋

int mei_hbm_write_message (struct mei_device *dev , struct mei_msg_hdr
*hdr , const void *data );

look at her go. three args, returns an int, main character energy fr fr. 💅

🎀 ARGUMENTS 🎀

  • dev — the mei device. the whole point. your main squeeze. 👑
  • hdr — the mei header. it's giving "i know a guy who knows a guy". ✨
  • data — the payload. the actual stuff being carried. the content, if you will. 🍓

🔥 RETURN 🔥

>=0 on success, <0 on error. classic. iconic. doesn't elaborate further. 💀

quick vibe check: that's greater-than-or-equal-to zero for the win, and strictly less than zero when things go sideways. no in-between, we don't do ambiguity here. 🌈

🌸 SEE ALSO 🌸

okay this is the fun part, the whole friend group is here. the kernel file lives at ./drivers/misc/mei/hbm.c, and then we got the entire crew:

like i said. the whole group chat. 🧚

alright bestie, that's the page. source is ./drivers/misc/mei, dated October 2026, and she answers to mei_hbm_write_message(9) 💜 — go forth and send those hbm messages, slay ✨

📦 where this page comes from