pci_num_vf(9) centos man page | unix.com

PCI_NUM_VF(9)							Hardware Interfaces						     PCI_NUM_VF(9)

NAME
       pci_num_vf - return number of VFs associated with a PF device_release_driver

SYNOPSIS
       int pci_num_vf(struct pci_dev * dev);

ARGUMENTS
       dev
	   the PCI device

DESCRIPTION
       Returns number of VFs, or 0 if SR-IOV is not enabled.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014							     PCI_NUM_VF(9)