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authorWilliams, Mitch A <mitch.a.williams@intel.com>2010-02-10 01:43:04 +0000
committerDavid S. Miller <davem@davemloft.net>2010-02-12 16:56:07 -0800
commitfb8a0d9d1bfd1e4355f307e86a6da7209eefd5f3 (patch)
tree99f23a4bc7c51343619f63970e5d017d75b5a66f /drivers/pci
parent81d54ec8479a2c695760da81f05b5a9fb2dbe40a (diff)
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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 <mitch.a.williams@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/pci')
-rw-r--r--drivers/pci/iov.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c
index b2a448e..3e5ab2b 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;
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