pcibios_set_master(9)

📦 version 7.3.1, in nixpkgs unstable

💖 pcibios_set_master 💖

okay so bestie, welcome to the Kernel API Manual — yes that's the manual name, slay, it lives up here at the top now, you're welcome 🎀

✨ NAME ✨

pcibios_set_master — the little function that switches on PCI bus-mastering for the device dev 👑

🌸 SYNOPSIS 🌸

void pcibios_set_master (struct pci_dev *dev );

bestie look at that. a void. it returns literally nothing. it's giving "i'm just here to do one job and leave" main character energy 💅

🦋 ARGUMENTS 🦋

  • dev — the PCI device you're about to enable. that's it. that's the whole argument list. no cap 🫶

⭐ DESCRIPTION ⭐

so what does it actually do?? it enables PCI bus-mastering for the device. periodt.

this one right here is the default implementation — like the vanilla, out-of-the-box version. and because Linux never met a thing it couldn't let an architecture customise, the docs are clear: architecture specific implementations can override this if necessary 🧚 so like, if you're on arm or whatever and your pcibios has opinions, it can absolutely step in and do its own thing. iykyk.

💜 SEE ALSO 💜

okay so this list is mortifyingly long and i'm not skipping a single one, because we don't gatekeep here. the kernel file lives at ./drivers/pci/pci.c and honestly? it's a whole friend group 🫶 (every one of these is a (9) manpage, i've kept them exactly as they are ✨):

like… that's the whole extended universe, bestie. every one of them. i counted. twice. 🍓

💀 reminder bestie: this is the default implementation, and arch-specific code can override it if necessary. don't come for me if your architecture is quirky.

and that's the page!! 🎀 written under ./drivers/pci, from the October 2026 release — mwah, love u, go enable some bus-mastering, slay 💅👑🌈

📦 where this page comes from