pci_bus_find_capability (9) - Linux Manuals

pci_bus_find_capability: query for devices' capabilities

NAME

pci_bus_find_capability - query for devices' capabilities

SYNOPSIS

int pci_bus_find_capability(struct pci_bus * bus, unsigned int devfn, int cap);

ARGUMENTS

bus

the PCI bus to query

devfn

PCI device to query

cap

capability code

DESCRIPTION

Like pci_find_capability but works for pci devices that do not have a pci_dev structure set up yet.

Returns the address of the requested capability structure within the device's PCI configuration space or 0 in case the device does not support it.

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