centos man page for pci_find_capability

PCI_FIND_CAPABILITY(9)						Hardware Interfaces					    PCI_FIND_CAPABILITY(9)

NAME
       pci_find_capability - query for devices' capabilities

SYNOPSIS
       int pci_find_capability(struct pci_dev * dev, int cap);

ARGUMENTS
       dev
	   PCI device to query

       cap
	   capability code

DESCRIPTION
       Tell if a device supports a given PCI capability. 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. Possible values for cap:

       PCI_CAP_ID_PM Power Management PCI_CAP_ID_AGP Accelerated Graphics Port PCI_CAP_ID_VPD Vital Product Data PCI_CAP_ID_SLOTID Slot
       Identification PCI_CAP_ID_MSI Message Signalled Interrupts PCI_CAP_ID_CHSWP CompactPCI HotSwap PCI_CAP_ID_PCIX PCI-X PCI_CAP_ID_EXP PCI
       Express

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						    PCI_FIND_CAPABILITY(9)