fixed_bar_cap(9)

okay so bestie, this is fixed_bar_cap(9) from the Kernel API Manual, and it’s lowkey a tiny little lookup icon. 💅✨

🌸 NAME 🌸

fixed_bar_cap — return the offset of the fixed BAR cap if found.

✨ SYNOPSIS ✨

int fixed_bar_cap (struct pci_bus *bus , unsigned int devfn );

🎀 ARGUMENTS 🎀

• bus — the PCI bus. 🚌
• devfn — the device in question. 👀

🦋 DESCRIPTION 🦋

So like, look for the fixed BAR cap on bus and devfn, bestie. If it’s found, you get its offset back; if not, you get 0. That’s it — no cap means just 0, periodt. 💖

🔥 SEE ALSO 🔥

• Kernel file ./arch/x86/pci/intel_mid.c: type1_access_ok(9), intel_mid_pci_init(9).

xoxo, your kernel bestie 🫶 — this page’s source/version is ./arch/x86/pci, dated October 2026. 💜