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PCI: add SR-IOV API for Physical Function driver

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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>
This commit is contained in:
Yu Zhao 2009-03-20 11:25:15 +08:00 • committed by Jesse Barnes
parent 480b93b783
commit dd7cc44d0b
3 changed files with 334 additions and 1 deletions
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19
include/linux/pci.h
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@ -265,6 +265,7 @@ struct pci_dev {
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 @@ struct pci_dev {
#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 @@ int pci_ext_cfg_avail(struct pci_dev *dev);
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 */