xilinx_pcie_map_bus(9)

✨ xilinx_pcie_map_bus(9) ✨

okay so bestie, welcome to the Kernel API Manual 💖 this one's a tiny little function from the PCI controller corner of the kernel and honestly it's giving "small but crucial" — no cap. Let's get into it 🎀

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💅 NAME 💅

xilinx_pcie_map_bus — get yourself that configuration base, periodt 👑

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🦋 SYNOPSIS 🦋

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

look at her go 😭 so clean, so simple, she takes three things and hands you back a pointer. main character energy fr fr ✨

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🌸 ARGUMENTS 🌸

• bus — the PCI Bus structure 🚌 like, the whole bus bestie, the context you're working inside
• devfn — Device/function 🎀 which device and which function on it, all smooshed into one number, iykyk
• where — Offset from base 📍 how far into it you're poking, measured from the base

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💜 RETURN 💜

She hands you back the base address of the configuration space that needs to be accessed 💫 that's the vibe check result — the address you need, no more no less 🫶

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🌈 SEE ALSO 🌈

lowkey the whole squad is here, go read them all 💖

• Kernel file ./drivers/pci/controller/pcie-xilinx.c
• struct xilinx_pcie(9)
• xilinx_pcie_clear_err_interrupts(9)
• xilinx_pcie_valid_device(9)
• xilinx_pcie_intx_map(9)
• xilinx_pcie_intr_handler(9)
• xilinx_pcie_init_irq_domain(9)
• xilinx_pcie_init_port(9)
• xilinx_pcie_parse_dt(9)
• xilinx_pcie_probe(9)

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ok that's the whole page bestie 🫶 go forth and map some buses, you're gonna slay 💅✨

and that's a wrap on this little lore drop from ./drivers/pci/controller — October 2026 edition, mwah 😘💖