tb_cfg_read_raw(9)

📦 version 7.3.1, in nixpkgs unstable

💅 tb_cfg_read_raw(9) — from the Kernel API Manual, bestie

Okay so welcome to the page for tb_cfg_read_raw(9) and honestly? It's giving "one job, does it well." It's a Thunderbolt kernel API function, it lives in the Kernel API Manual, and it's about to read config space into a buffer. Let's go 🫶

✨ NAME ✨

tb_cfg_read_raw — read from config space into buffer 💖

🌸 SYNOPSIS 🌸

struct tb_cfg_result tb_cfg_read_raw (struct tb_ctl *ctl , void *buffer
, u64 route , u32 port , enum tb_cfg_space space , u32 offset , u32
length , int timeout_msec );

Like, yes, it's a long signature. It ate. 🔥

🎀 ARGUMENTS 🎀

  • ctl — Pointer to the control channel. Your main character connection ngl 💅
  • buffer — Buffer where the data is read. This is where the good stuff lands ✨
  • route — Route string of the router. Iykyk, it's how you find your way there 🦋
  • port — Port number when reading from TB_CFG_PORT, 0 otherwise. Literally: use 0 in every other case, no cap 🙈
  • space — Config space selector. Pick your vibe check 💜
  • offset — Dword word offset of the register to start reading. Dword word offset, bestie, it's specific 🌸
  • length — Number of dwords to read. Count 'em 🎀
  • timeout_msec — Timeout in ms how long to wait for the response. Don't wait forever, it's not worth it 😭

🦋 DESCRIPTION 🦋

Reads from router config space without translating the possible error.

That's the whole vibe: it fetches the raw goods and does not do the error-translation glow-up for you. You get it exactly as it comes, bestie ✨

⭐ RETURN ⭐

Returns a struct tb_cfg_result with a non-zero err field if an error has occurred. So like, check that field. Please. For me 💀

🌈 SEE ALSO 🌈

All the linked-up lore, in the order the page gives it:

And that's the page, periodt 👑 Signing off from ./drivers/thunderbolt, dated October 2026 — ty for coming to my TED talk, drink water, and always check your err field 💖🎀💅

📦 where this page comes from