1 files changed, 13 insertions, 0 deletions

diff --git a/arch/powerpc/include/asm/dma-mapping.h b/arch/powerpc/include/asm/dma-mapping.h
index b44aaabdd1a6..6ff1f8581d79 100644
--- a/arch/powerpc/include/asm/dma-mapping.h
+++ b/arch/powerpc/include/asm/dma-mapping.h
@@ -424,6 +424,19 @@ static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
 #endif
 }
 
+static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
+{
+        struct dma_mapping_ops *ops = get_dma_ops(dev);
+
+        if (ops->addr_needs_map && ops->addr_needs_map(dev, addr, size))
+                return 0;
+
+        if (!dev->dma_mask)
+                return 0;
+
+        return addr + size <= *dev->dma_mask;
+}
+
 #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
 #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
 #ifdef CONFIG_NOT_COHERENT_CACHE