X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=include%2Flinux%2Fdma-mapping.h;h=ba9114ec5d3aa953a13f057e157b6b866de76f53;hb=fab349cceb25f92bac1400601c5ef8345a166958;hp=952e0f857ac9d9545750bbd5f197df6034a99913;hpb=c36c804559d3a891a2e655ba8185b4fa7eaee156;p=linux-2.6-omap-h63xx.git

diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index 952e0f857ac..ba9114ec5d3 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -48,6 +48,11 @@ static inline int is_device_dma_capable(struct device *dev)
 	return dev->dma_mask != NULL && *dev->dma_mask != DMA_MASK_NONE;
 }
 
+static inline int is_buffer_dma_capable(u64 mask, dma_addr_t addr, size_t size)
+{
+	return addr + size <= mask;
+}
+
 #ifdef CONFIG_HAS_DMA
 #include <asm/dma-mapping.h>
 #else
@@ -58,6 +63,13 @@ static inline int is_device_dma_capable(struct device *dev)
 #define dma_sync_single		dma_sync_single_for_cpu
 #define dma_sync_sg		dma_sync_sg_for_cpu
 
+static inline u64 dma_get_mask(struct device *dev)
+{
+	if (dev && dev->dma_mask && *dev->dma_mask)
+		return *dev->dma_mask;
+	return DMA_32BIT_MASK;
+}
+
 extern u64 dma_get_required_mask(struct device *dev);
 
 static inline unsigned int dma_get_max_seg_size(struct device *dev)