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powerpc/pci: Create pci_dn for VFs

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pci_dn is the extension of PCI device node and is created from device node.
Unfortunately, VFs are enabled dynamically by PF's driver and they don't
have corresponding device nodes and pci_dn, which is required to access
VFs' config spaces.

The patch creates pci_dn for VFs in pcibios_sriov_enable() on their PF,
and removes pci_dn for VFs in pcibios_sriov_disable() on their PF. When
VF's pci_dn is created, it's put to the child list of the pci_dn of PF's
upstream bridge. The pci_dn is linked to pci_dev during early fixup time
to setup the fast path.

[bhelgaas: add ifdef around add_one_dev_pci_info(), use dev_printk()]
Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Gavin Shan
2015-03-25 16:23:52 +08:00
committed by Benjamin Herrenschmidt
parent d74b9027a4
commit a8b2f8288a
3 changed files with 135 additions and 0 deletions
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3
arch/powerpc/include/asm/pci-bridge.h
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@@ -156,6 +156,7 @@ struct iommu_table;
struct pci_dn {
int flags;
#define PCI_DN_FLAG_IOV_VF 0x01
int busno; /* pci bus number */
int devfn; /* pci device and function number */
@@ -188,6 +189,8 @@ struct pci_dn {
extern struct pci_dn *pci_get_pdn_by_devfn(struct pci_bus *bus,
int devfn);
extern struct pci_dn *pci_get_pdn(struct pci_dev *pdev);
extern struct pci_dn *add_dev_pci_data(struct pci_dev *pdev);
extern void remove_dev_pci_data(struct pci_dev *pdev);
extern void *update_dn_pci_info(struct device_node *dn, void *data);
static inline int pci_device_from_OF_node(struct device_node *np,