pci_bus_alloc_resource(9)

📦 version 7.3.1, in nixpkgs unstable

💖 pci_bus_alloc_resource(9) 💖

okay so bestie, welcome to the Kernel API Manual — this is the page for pci_bus_alloc_resource, and honestly? It's giving "let me find your device a home" energy. Let's get into it 🫶

✨ NAME ✨

pci_bus_alloc_resource — allocate a resource from a parent bus. That's it, that's the whole vibe 💅

🌸 SYNOPSIS 🌸

int pci_bus_alloc_resource (struct pci_bus *bus , struct resource *res ,
resource_size_t size , resource_size_t align , resource_size_t min ,
unsigned long type_mask , resource_alignf alignf , void *alignf_data );

Like, look at that signature. Eight whole arguments. She's highkey thorough 🔥

🎀 ARGUMENTS 🎀

Every single one, bestie, no skipping ✨

  • bus — the PCI bus. The main character we're working with 👑
  • res — the resource to allocate. Your little container, your spot to claim 💖
  • size — how big the resource you're allocating is 📏
  • align — the alignment of the resource you're allocating. She needs to line up, periodt ⭐
  • min — the minimum /proc/iomem address to allocate. Like, don't even think about going below this 🙈
  • type_mask — the IORESOURCE_* type flags 🦋
  • alignf — the resource alignment function. The literal matchmaker of this whole operation 💫
  • alignf_data — the data argument that gets passed to that resource alignment function 🍓

💜 DESCRIPTION 💜

So here's the tea: you give it the PCI bus that a device resides on, plus the size, the minimum address, the alignment and the type — and it tries to find an acceptable resource allocation for a specific device resource 🎯

That's it. That's the mission. Match the device resource to a spot that actually works. Slay, honestly ✨

🌈 SEE ALSO 🌈

the kernel file ./drivers/pci/bus.c 👀 and also these icons:

go read them, iykyk 💅

okay that's the page!! this one lives in ./drivers/pci, and the fancy footer energy is: October 2026 ⭐ mwah, go allocate something cute 💖🧚‍♀️

📦 where this page comes from