peci_mmio_read(9)

📦 version 7.3.1, in nixpkgs unstable

💖 peci_mmio_read (9) — Kernel API Manual, but make it slay 💖

okay so bestie, welcome to the peci_mmio_read page ✨ this is a kernel API manual page, and it's genuinely so useful — let me put you on real quick 🫶

🌸 NAME 🌸

peci_mmio_read — read a 32-bit memory location using a 64-bit bar offset address 💅

🎀 SYNOPSIS 🎀

int peci_mmio_read (struct peci_device *device , u8 bar , u8 seg , u8
       bus , u8 dev , u8 func , u64 address , u32 *data );

literally that's the whole signature, keep it exactly like that, no cap 👑

🦋 ARGUMENTS 🦋

  • device — the PECI device that this request is going to be sent to 📨
  • bar — PCI bar
  • seg — PCI segment
  • bus — bus
  • dev — device
  • func — function
  • address — the 64-bit MMIO address
  • data — where you store the read data 🏠

✨ DESCRIPTION ✨

So what does it actually do? It uses the RdEndpointConfig PECI command. that's the vibe. that's the whole description. iconic of it honestly 🎀

💜 RETURN 💜

  • 0 if it succeeded 🎉
  • other values in case of errors 😭

🌈 SEE ALSO 🌈

Kernel file ./drivers/peci/cpu.c, plus these little besties:

🫶 quick reminder bestie: every flag, arg, value, and path above is exactly as it appears in the real page — no ✨creative liberties✨ taken with the technical bits 💅

and that's the whole page, fr fr 🦋 this one lives in ./drivers/peci and its date stamp is October 2026 — and remember, it's peci_mmio_read(9), the main character of its own footer 💖 matter of fact, go read peci_temp_read(9) next, iykyk 🔥

📦 where this page comes from