2 files changed, 5 insertions, 1 deletions

diff --git a/arch/powerpc/include/asm/dma-mapping.h b/arch/powerpc/include/asm/dma-mapping.h
index dd70fac57ec..8135e66a4bb 100644
--- a/arch/powerpc/include/asm/dma-mapping.h
+++ b/arch/powerpc/include/asm/dma-mapping.h
@@ -20,6 +20,8 @@
 
 #define DMA_ERROR_CODE          (~(dma_addr_t)0x0)
 
+#define ARCH_HAS_DMA_GET_REQUIRED_MASK
+
 /* Some dma direct funcs must be visible for use in other dma_ops */
 extern void *dma_direct_alloc_coherent(struct device *dev, size_t size,
                                        dma_addr_t *dma_handle, gfp_t flag);
@@ -69,6 +71,7 @@ static inline unsigned long device_to_mask(struct device *dev)
  */
 #ifdef CONFIG_PPC64
 extern struct dma_map_ops dma_iommu_ops;
+extern u64 dma_iommu_get_required_mask(struct device *dev);
 #endif
 extern struct dma_map_ops dma_direct_ops;
 
diff --git a/arch/powerpc/include/asm/machdep.h b/arch/powerpc/include/asm/machdep.h
index 47cacddb14c..58fc2162301 100644
--- a/arch/powerpc/include/asm/machdep.h
+++ b/arch/powerpc/include/asm/machdep.h
@@ -85,8 +85,9 @@ struct machdep_calls {
         void            (*pci_dma_dev_setup)(struct pci_dev *dev);
         void            (*pci_dma_bus_setup)(struct pci_bus *bus);
 
-        /* Platform set_dma_mask override */
+        /* Platform set_dma_mask and dma_get_required_mask overrides */
         int             (*dma_set_mask)(struct device *dev, u64 dma_mask);
+        u64             (*dma_get_required_mask)(struct device *dev);
 
         int             (*probe)(void);
         void            (*setup_arch)(void); /* Optional, may be NULL */