pci_is_pcie(9)

💅 pci_is_pcie — check if the PCI device is PCI Express capable

okay so bestie, it's a Kernel API Manual moment and this little function is literally the vibe check for PCIe 💖 it's pci_is_pcie from section 9, and it's about to tell you whether your device is PCI Express capable or not. no cap, that's the whole personality.

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✨ SYNOPSIS ✨

bool pci_is_pcie (struct pci_dev *dev );

like, you hand it a device, it hands you back a bool. simple as that, periodt 🎀

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🌸 ARGUMENTS 🌸

• dev — the PCI device 🫶 that's it, that's the whole argument. one (1) device, and it's the one we're checking.

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⭐ RETURN ⭐

• true 😭✨ if the PCI device is PCI Express capable
• false 💀 otherwise

literally that binary, no in-between, the function ate and left no crumbs 👑

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🦋 SEE ALSO 🦋

Kernel file ./include/linux/pci.h — plus the whole friend group, go say hi:

• 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)
• pcie_caps_reg(9)
• pci_pcie_type(9)
• pcie_find_root_port(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)

iykyk, it's a whole squad 💅🌈

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lowkey reminder: ./include/linux is where it lives, and the docs are dated October 2026 — iconic, honestly 📅✨

that's the page bestie, go check your devices, slay, and stay PCIe-pilled 🧚💜