4 #ifdef CONFIG_HAVE_GENERIC_DMA_COHERENT
6 * These two functions are only for dma allocator.
7 * Don't use them in device drivers.
9 int dma_alloc_from_coherent(struct device *dev, ssize_t size,
10 dma_addr_t *dma_handle, void **ret);
11 int dma_release_from_coherent(struct device *dev, int order, void *vaddr);
16 #define ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY
18 dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
19 dma_addr_t device_addr, size_t size, int flags);
22 dma_release_declared_memory(struct device *dev);
25 dma_mark_declared_memory_occupied(struct device *dev,
26 dma_addr_t device_addr, size_t size);
28 #define dma_alloc_from_coherent(dev, size, handle, ret) (0)
29 #define dma_release_from_coherent(dev, order, vaddr) (0)