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pci: Add SRIOV helper function to determine if VFs are assigned to guest

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This function is meant to add a helper function that will determine if a PF
has any VFs that are currently assigned to a guest.  We currently have been
implementing this function per driver, and going forward I would like to avoid
that by making this function generic and using this helper.

v2: Removed extern from declaration of pci_vfs_assigned in pci.h and return
    0 if SR-IOV is disabled with is inline with other PCI SRIOV functions.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Alexander Duyck
2013-04-25 04:42:29 +00:00
committed by Jeff Kirsher
parent d44e7a9a1f
commit 5a8eb24292
2 changed files with 46 additions and 0 deletions
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5
include/linux/pci.h
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@@ -1644,6 +1644,7 @@ extern int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn);
extern void pci_disable_sriov(struct pci_dev *dev);
extern irqreturn_t pci_sriov_migration(struct pci_dev *dev);
extern int pci_num_vf(struct pci_dev *dev);
int pci_vfs_assigned(struct pci_dev *dev);
extern int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs);
extern int pci_sriov_get_totalvfs(struct pci_dev *dev);
#else
@@ -1662,6 +1663,10 @@ static inline int pci_num_vf(struct pci_dev *dev)
{
return 0;
}
static inline int pci_vfs_assigned(struct pci_dev *dev)
{
return 0;
}
static inline int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs)
{
return 0;