+struct dma_map_ops {
+ void* (*alloc_coherent)(struct device *dev, size_t size,
+ dma_addr_t *dma_handle, gfp_t gfp);
+ void (*free_coherent)(struct device *dev, size_t size,
+ void *vaddr, dma_addr_t dma_handle);
+ dma_addr_t (*map_page)(struct device *dev, struct page *page,
+ unsigned long offset, size_t size,
+ enum dma_data_direction dir,
+ struct dma_attrs *attrs);
+ void (*unmap_page)(struct device *dev, dma_addr_t dma_handle,
+ size_t size, enum dma_data_direction dir,
+ struct dma_attrs *attrs);
+ int (*map_sg)(struct device *dev, struct scatterlist *sg,
+ int nents, enum dma_data_direction dir,
+ struct dma_attrs *attrs);
+ void (*unmap_sg)(struct device *dev,
+ struct scatterlist *sg, int nents,
+ enum dma_data_direction dir,
+ struct dma_attrs *attrs);
+ void (*sync_single_for_cpu)(struct device *dev,
+ dma_addr_t dma_handle, size_t size,
+ enum dma_data_direction dir);
+ void (*sync_single_for_device)(struct device *dev,
+ dma_addr_t dma_handle, size_t size,
+ enum dma_data_direction dir);
+ void (*sync_single_range_for_cpu)(struct device *dev,
+ dma_addr_t dma_handle,
+ unsigned long offset,
+ size_t size,
+ enum dma_data_direction dir);
+ void (*sync_single_range_for_device)(struct device *dev,
+ dma_addr_t dma_handle,
+ unsigned long offset,
+ size_t size,
+ enum dma_data_direction dir);
+ void (*sync_sg_for_cpu)(struct device *dev,
+ struct scatterlist *sg, int nents,
+ enum dma_data_direction dir);
+ void (*sync_sg_for_device)(struct device *dev,
+ struct scatterlist *sg, int nents,
+ enum dma_data_direction dir);
+ int (*mapping_error)(struct device *dev, dma_addr_t dma_addr);
+ int (*dma_supported)(struct device *dev, u64 mask);
+ int is_phys;
+};
+
+#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
+
+/*
+ * NOTE: do not use the below macros in new code and do not add new definitions
+ * here.
+ *
+ * Instead, just open-code DMA_BIT_MASK(n) within your driver
+ */
+#define DMA_64BIT_MASK DMA_BIT_MASK(64)
+#define DMA_48BIT_MASK DMA_BIT_MASK(48)
+#define DMA_47BIT_MASK DMA_BIT_MASK(47)
+#define DMA_40BIT_MASK DMA_BIT_MASK(40)
+#define DMA_39BIT_MASK DMA_BIT_MASK(39)
+#define DMA_35BIT_MASK DMA_BIT_MASK(35)
+#define DMA_32BIT_MASK DMA_BIT_MASK(32)
+#define DMA_31BIT_MASK DMA_BIT_MASK(31)
+#define DMA_30BIT_MASK DMA_BIT_MASK(30)
+#define DMA_29BIT_MASK DMA_BIT_MASK(29)
+#define DMA_28BIT_MASK DMA_BIT_MASK(28)
+#define DMA_24BIT_MASK DMA_BIT_MASK(24)