PCI: add SR-IOV API for Physical Function driver
Add or remove the Virtual Function when the SR-IOV is enabled or
disabled by the device driver. This can happen anytime rather than
only at the device probe stage.
Reviewed-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Yu Zhao <yu.zhao@intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 8ce2f2d..c2e491e 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -265,6 +265,7 @@
unsigned int is_pcie:1;
unsigned int state_saved:1;
unsigned int is_physfn:1;
+ unsigned int is_virtfn:1;
pci_dev_flags_t dev_flags;
atomic_t enable_cnt; /* pci_enable_device has been called */
@@ -279,7 +280,10 @@
#endif
struct pci_vpd *vpd;
#ifdef CONFIG_PCI_IOV
- struct pci_sriov *sriov; /* SR-IOV capability related */
+ union {
+ struct pci_sriov *sriov; /* SR-IOV capability related */
+ struct pci_dev *physfn; /* the PF this VF is associated with */
+ };
#endif
};
@@ -1212,5 +1216,18 @@
void __iomem *pci_ioremap_bar(struct pci_dev *pdev, int bar);
+#ifdef CONFIG_PCI_IOV
+extern int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn);
+extern void pci_disable_sriov(struct pci_dev *dev);
+#else
+static inline int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn)
+{
+ return -ENODEV;
+}
+static inline void pci_disable_sriov(struct pci_dev *dev)
+{
+}
+#endif
+
#endif /* __KERNEL__ */
#endif /* LINUX_PCI_H */