pci_find_parent_resource(9)

📦 version 7.3.1, in nixpkgs unstable

✨ pci_find_parent_resource ✨

okay so this is a page from the Kernel API Manual (section 9, the kernel-functions section, iykyk) and it's about one very specific little helper that goes "hey, this resource lives inside whose bus exactly?" 💅

🎀 NAME 🎀

pci_find_parent_resource — literally returns the resource region of the parent bus of a given region. that's it, that's the whole vibe 🦋

🌸 SYNOPSIS 🌸

struct resource * pci_find_parent_resource (const struct pci_dev *dev ,
struct resource *res );

no cap, that's the whole signature. two args in, one struct resource * out ✨

💖 ARGUMENTS 💖

  • dev — the PCI device structure, and it's the one holding all the resources we're gonna go rummaging through 🔍 like it's the group chat and we're scrolling for receipts.
  • res — the child resource record, aka the baby resource whose parent we're out here looking for. we want its mom basically 🫶

🦋 DESCRIPTION 🦋

okay bestie so here's the deal: you hand it some resource region belonging to some device, and it hands you back the resource region of the parent bus that your given region is contained in. that's the whole function. it's giving "who's your parent" energy 👑

it's a finder. it finds. it returns. iconic behaviour, honestly 🌈

⭐ SEE ALSO ⭐

the kernel file it lives in: ./drivers/pci/pci.c — go read it, it's right there in the source tree 📂

and then. okay. the see-also section on this page is enormous, it's giving main character energy of its own, so buckle up bestie 😭 here's every single one, in order, no skips:

and that's the list!! you're so welcome, it's literally the whole PCI subsystem in one see-also section 💀🫶

okay that's the page!! it came from ./drivers/pci and it's dated October 2026 — screenshot it, cite it, print it out and put it on your wall, mwah 💋✨

📦 where this page comes from