pci_mmap_resource(9)

🌸 NAME 🌸

okay so pci_mmap_resource is the name, and it does exactly what it says on the tin: map a PCI resource into user memory space. This is the pci_mmap_resource(9) page from the Kernel API Manual, and yes bestie, it’s giving kernel-level main character energy. 💅

✨ SYNOPSIS ✨

int pci_mmap_resource (struct kobject *kobj , const struct bin_attribute
       *attr , struct vm_area_struct *vma , int write_combine );

🎀 ARGUMENTS 🎀

• kobj — the kobject for mapping. That’s literally it, bestie.
• attr — the struct bin_attribute for the file being mapped. Iconic struct behavior.
• vma — the struct vm_area_struct that gets passed into the mmap. Not me forgetting this one.
• write_combine — 1 for a write_combine mapping. That’s the value, periodt.

💅 DESCRIPTION 💅

Use the regular PCI mapping routines to map a PCI resource into userspace. No cap: that’s the described job, and it’s not trying to be extra. 💖

👑 SEE ALSO 👑

Kernel file: ./drivers/pci/pci-sysfs.c — and the whole friend group is here:

• pci_read_legacy_io(9)
• pci_write_legacy_io(9)
• pci_mmap_legacy_mem(9)
• pci_mmap_legacy_io(9)
• pci_write_rom(9)
• pci_read_rom(9)

source/version: ./drivers/pci · date: October 2026 · page: pci_mmap_resource(9) — mwah, bye bestie! 🧚💖