From fb8a0d9d1bfd1e4355f307e86a6da7209eefd5f3 Mon Sep 17 00:00:00 2001 From: "Williams, Mitch A" Date: Wed, 10 Feb 2010 01:43:04 +0000 Subject: pci: Add SR-IOV convenience functions and macros Add and export pci_num_vf to allow other subsystems to determine how many virtual function devices are associated with an SR-IOV physical function device. Add macros dev_is_pci, dev_is_ps, and dev_num_vf to make it easier for non-PCI specific code to determine SR-IOV capabilities. Signed-off-by: Mitch Williams Signed-off-by: Jeff Kirsher Signed-off-by: David S. Miller --- drivers/pci/iov.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'drivers/pci') diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c index b2a448e19fe6..3e5ab2bf6a5c 100644 --- a/drivers/pci/iov.c +++ b/drivers/pci/iov.c @@ -706,6 +706,21 @@ irqreturn_t pci_sriov_migration(struct pci_dev *dev) } EXPORT_SYMBOL_GPL(pci_sriov_migration); +/** + * pci_num_vf - return number of VFs associated with a PF device_release_driver + * @dev: the PCI device + * + * Returns number of VFs, or 0 if SR-IOV is not enabled. + */ +int pci_num_vf(struct pci_dev *dev) +{ + if (!dev || !dev->is_physfn) + return 0; + else + return dev->sriov->nr_virtfn; +} +EXPORT_SYMBOL_GPL(pci_num_vf); + static int ats_alloc_one(struct pci_dev *dev, int ps) { int pos; -- cgit v1.2.2