pcie_find_root_port(9)

💅 pcie_find_root_port(9) 💅

okay bestie, welcome to the Kernel API Manual ✨ this one's a lil function from Linux kernel land that goes hunting for hardware, and honestly? it's giving "follow the breadcrumbs" energy 🍓

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🌸 NAME 🌸

pcie_find_root_port — literally just gets you the PCIe root port device. that's it. that's the whole gig 💖

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✨ SYNOPSIS ✨

struct pci_dev * pcie_find_root_port (struct pci_dev *dev );

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🎀 ARGUMENTS 🎀

• dev — a PCI device 🫶 (yes, that's the whole description, she's low maintenance)

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🦋 DESCRIPTION 🦋

so here's the vibe: you hand it a PCI/PCIe Device, and it traverses up the parent chain 🔥 — like climbing the family tree — and returns the PCIe Root Port PCI Device for that device you gave it. no cap, it just walks up until it finds the root port and hands it to you 👑

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💅 SEE ALSO 💅

the whole friend group 🫶 (and yes, the kernel file too):

• ./include/linux/pci.h
• enum pci_interrupt_pin(9)
• pci_channel_state_t(9)
• pci_is_bridge(9)
• pci_is_vga(9)
• pci_is_display(9)
• struct pci_driver(9)
• PCI_DEVICE(9)
• PCI_DEVICE_DRIVER_OVERRIDE(9)
• PCI_DRIVER_OVERRIDE_DEVICE_VFIO(9)
• PCI_DEVICE_SUB(9)
• PCI_DEVICE_CLASS(9)
• PCI_VDEVICE(9)
• PCI_VDEVICE_SUB(9)
• PCI_DEVICE_DATA(9)
• pcie_capability_clear_and_set_word(9)
• pci_bus_for_each_resource(9)
• module_pci_driver(9)
• builtin_pci_driver(9)
• pci_irq_type(9)
• pci_irqd_intx_xlate(9)
• pci_resource_is_io(9)
• pci_resource_is_mem(9)
• pci_pcie_cap(9)
• pci_is_pcie(9)
• pcie_caps_reg(9)
• pci_pcie_type(9)
• pci_vpd_alloc(9)
• pci_vpd_find_id_string(9)
• pci_vpd_find_ro_info_keyword(9)
• pci_vpd_check_csum(9)
• pci_ari_enabled(9)
• pci_is_thunderbolt_attached(9)

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ngl there are SO many of these but you gotta read them all, bestie — no skipping the boring parts, i don't make the rules 💀

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and that's a wrap!! 🎀 this gorgeous page lives over in ./include/linux, stamped October 2026, and it's pcie_find_root_port(9) all day every day 🌈 slay, go find those root ports, mwah 💜