powerpc: Create pci_controller_ops.dma_bus_setup and shim

Add pci_controller_ops.dma_bus_setup, shadowing ppc_md.pci_dma_bus_setup.
Add a shim, and changes the callsites to use the shim.

Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

1 files changed, 11 insertions, 0 deletions

diff --git a/arch/powerpc/include/asm/pci-bridge.h b/arch/powerpc/include/asm/pci-bridge.h
index 0f441b8e1ea1..b9732fcb0f5f 100644
--- a/arch/powerpc/include/asm/pci-bridge.h
+++ b/arch/powerpc/include/asm/pci-bridge.h
@@ -19,6 +19,7 @@ struct device_node;
  */
 struct pci_controller_ops {
         void            (*dma_dev_setup)(struct pci_dev *dev);
+        void            (*dma_bus_setup)(struct pci_bus *bus);
 };
 
 /*
@@ -281,5 +282,15 @@ static inline void pci_dma_dev_setup(struct pci_dev *dev)
                 ppc_md.pci_dma_dev_setup(dev);
 }
 
+static inline void pci_dma_bus_setup(struct pci_bus *bus)
+{
+        struct pci_controller *phb = pci_bus_to_host(bus);
+
+        if (phb->controller_ops.dma_bus_setup)
+                phb->controller_ops.dma_bus_setup(bus);
+        else if (ppc_md.pci_dma_bus_setup)
+                ppc_md.pci_dma_bus_setup(bus);
+}
+
 #endif  /* __KERNEL__ */
 #endif  /* _ASM_POWERPC_PCI_BRIDGE_H */