nwl_pcie_map_bus(9)

💅 nwl_pcie_map_bus — get configuration base ✨

okay so bestie, welcome to nwl_pcie_map_bus(9), straight out of the Kernel API Manual 💖 this is the little function that hands you back the configuration base — like, it knows exactly where in config space you need to be poking around, and it tells you. no cap, that's the whole vibe. 🎀

✨ SYNOPSIS ✨

void __iomem * nwl_pcie_map_bus (struct pci_bus *bus , unsigned int
devfn , int where );

that's the whole signature, typed out character for character because we do NOT play fast and loose with function prototypes in this house 🫶

🌸 ARGUMENTS 🌸

• bus — the bus structure of the current bus 🚌 like, the actual bus you're working on rn. main character energy.
• devfn — device/function 🔥 yep, both of them, squished into one argument. iconic.
• where — the offset from base 📍 how far you're stepping away from the start. lowkey important.

👑 RETURN 👑

it returns the base address of the configuration space that needs to be accessed 💫 that's it, that's the whole gift. void __iomem * and everything, so you know it's a real memory-mapped situation 💀

ngl bestie, if you were hoping for an error code or something — nope. it just gives you the base address. periodt.

🦋 SEE ALSO 🦋

• Kernel file ./drivers/pci/controller/pcie-xilinx-nwl.c ⭐ — go read the source, iykyk, that's where the real lore lives 🧚

okay that's the page!! and before you go — this little masterpiece came from ./drivers/pci/controller, dated October 2026, and it goes by nwl_pcie_map_bus(9) 🌈 mwah, love u, go map some buses bestie 💜🎀🌸