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powerpc/pcidn: Make VF pci_dn management CONFIG_PCI_IOV specific

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The powerpc PCI code requires that a pci_dn structure exists for all
devices in the system. This is fine for real devices since at boot a pci_dn
is created for each PCI device in the DT and it's fine for hotplugged devices
since the hotplug slot driver will manage the pci_dn's devices in hotplug
slots. For SR-IOV, we need the platform / pcibios to manage the pci_dn for
virtual functions since firmware is unaware of VFs, and they aren't
"hot plugged" in the traditional sense.

Management of the pci_dn is handled by the, poorly named, functions:
add_pci_dev_data() and remove_pci_dev_data(). The entire body of these
functions is #ifdef`ed around CONFIG_PCI_IOV and they cannot be used
in any other context, so make them only available when CONFIG_PCI_IOV
is selected, and rename them to reflect their actual usage rather than
having them masquerade as generic code.

Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
Reviewed-by: Sam Bobroff <sbobroff@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190821062655.19735-2-oohall@gmail.com
This commit is contained in:
Oliver O'Halloran
2019-08-21 16:26:54 +10:00
committed by Michael Ellerman
parent 1fb4124ca9
commit 8cd6aacc64
4 changed files with 14 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
arch/powerpc/include/asm/pci-bridge.h
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@@ -223,12 +223,15 @@ 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 struct pci_dn *pci_add_device_node_info(struct pci_controller *hose,
struct device_node *dn);
extern void pci_remove_device_node_info(struct device_node *dn);
#ifdef CONFIG_PCI_IOV
struct pci_dn *add_sriov_vf_pdns(struct pci_dev *pdev);
void remove_sriov_vf_pdns(struct pci_dev *pdev);
#endif
static inline int pci_device_from_OF_node(struct device_node *np,
u8 *bus, u8 *devfn)
{