size_t size, enum dma_data_direction dir,
unsigned long attrs);
/*
- * map_sg returns 0 on error and a value > 0 on success.
- * It should never return a value < 0.
+ * map_sg should return a negative error code on error. See
+ * dma_map_sgtable() for a list of appropriate error codes
+ * and their meanings.
*/
int (*map_sg)(struct device *dev, struct scatterlist *sg, int nents,
enum dma_data_direction dir, unsigned long attrs);
int dma_release_from_dev_coherent(struct device *dev, int order, void *vaddr);
int dma_mmap_from_dev_coherent(struct device *dev, struct vm_area_struct *vma,
void *cpu_addr, size_t size, int *ret);
-
-void *dma_alloc_from_global_coherent(struct device *dev, ssize_t size,
- dma_addr_t *dma_handle);
-int dma_release_from_global_coherent(int order, void *vaddr);
-int dma_mmap_from_global_coherent(struct vm_area_struct *vma, void *cpu_addr,
- size_t size, int *ret);
-
#else
static inline int dma_declare_coherent_memory(struct device *dev,
phys_addr_t phys_addr, dma_addr_t device_addr, size_t size)
#define dma_alloc_from_dev_coherent(dev, size, handle, ret) (0)
#define dma_release_from_dev_coherent(dev, order, vaddr) (0)
#define dma_mmap_from_dev_coherent(dev, vma, vaddr, order, ret) (0)
+#endif /* CONFIG_DMA_DECLARE_COHERENT */
+#ifdef CONFIG_DMA_GLOBAL_POOL
+void *dma_alloc_from_global_coherent(struct device *dev, ssize_t size,
+ dma_addr_t *dma_handle);
+int dma_release_from_global_coherent(int order, void *vaddr);
+int dma_mmap_from_global_coherent(struct vm_area_struct *vma, void *cpu_addr,
+ size_t size, int *ret);
+int dma_init_global_coherent(phys_addr_t phys_addr, size_t size);
+#else
static inline void *dma_alloc_from_global_coherent(struct device *dev,
ssize_t size, dma_addr_t *dma_handle)
{
{
return 0;
}
-#endif /* CONFIG_DMA_DECLARE_COHERENT */
+#endif /* CONFIG_DMA_GLOBAL_POOL */
/*
* This is the actual return value from the ->alloc_noncontiguous method.