pci_get_domain_bus_and_slot (9) - Linux Manuals
pci_get_domain_bus_and_slot: locate PCI device for a given PCI domain (segment), bus, and slot
pci_get_domain_bus_and_slot - locate PCI device for a given PCI domain (segment), bus, and slot
struct pci_dev * pci_get_domain_bus_and_slot(int
domain, unsigned int bus, unsigned int devfn);
- PCI domain/segment on which the PCI device resides.
- PCI bus on which desired PCI device resides
- encodes number of PCI slot in which the desired PCI device resides and the logical device number within that slot in case of multi-function devices.
Given a PCI domain, bus, and slot/function number, the desired PCI device is located in the list of PCI devices. If the device is found, its reference count is increased and this function returns a pointer to its data structure. The caller must decrement the reference count by calling pci_dev_put. If no device is found, NULL is returned.