diff options
Diffstat (limited to 'include/linux/dma-mapping.h')
| -rw-r--r-- | include/linux/dma-mapping.h | 34 |
1 files changed, 28 insertions, 6 deletions
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index cc0517b71c5e..d6b575bb45a7 100644 --- a/include/linux/dma-mapping.h +++ b/include/linux/dma-mapping.h @@ -11,7 +11,6 @@ #include <linux/scatterlist.h> #include <linux/kmemcheck.h> #include <linux/bug.h> -#include <asm-generic/dma-coherent.h> /* * A dma_addr_t can hold any valid DMA or bus address for the platform. @@ -87,6 +86,23 @@ static inline int is_device_dma_capable(struct device *dev) return dev->dma_mask != NULL && *dev->dma_mask != DMA_MASK_NONE; } +#ifdef CONFIG_HAVE_GENERIC_DMA_COHERENT +/* + * These three functions are only for dma allocator. + * Don't use them in device drivers. + */ +int dma_alloc_from_coherent(struct device *dev, ssize_t size, + dma_addr_t *dma_handle, void **ret); +int dma_release_from_coherent(struct device *dev, int order, void *vaddr); + +int dma_mmap_from_coherent(struct device *dev, struct vm_area_struct *vma, + void *cpu_addr, size_t size, int *ret); +#else +#define dma_alloc_from_coherent(dev, size, handle, ret) (0) +#define dma_release_from_coherent(dev, order, vaddr) (0) +#define dma_mmap_from_coherent(dev, vma, vaddr, order, ret) (0) +#endif /* CONFIG_HAVE_GENERIC_DMA_COHERENT */ + #ifdef CONFIG_HAS_DMA #include <asm/dma-mapping.h> #else @@ -568,7 +584,13 @@ static inline int dma_get_cache_alignment(void) #define DMA_MEMORY_INCLUDES_CHILDREN 0x04 #define DMA_MEMORY_EXCLUSIVE 0x08 -#ifndef ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY +#ifdef CONFIG_HAVE_GENERIC_DMA_COHERENT +int dma_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr, + dma_addr_t device_addr, size_t size, int flags); +void dma_release_declared_memory(struct device *dev); +void *dma_mark_declared_memory_occupied(struct device *dev, + dma_addr_t device_addr, size_t size); +#else static inline int dma_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr, dma_addr_t device_addr, size_t size, int flags) @@ -587,7 +609,7 @@ dma_mark_declared_memory_occupied(struct device *dev, { return ERR_PTR(-EBUSY); } -#endif +#endif /* CONFIG_HAVE_GENERIC_DMA_COHERENT */ /* * Managed DMA API @@ -600,13 +622,13 @@ extern void *dmam_alloc_noncoherent(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t gfp); extern void dmam_free_noncoherent(struct device *dev, size_t size, void *vaddr, dma_addr_t dma_handle); -#ifdef ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY +#ifdef CONFIG_HAVE_GENERIC_DMA_COHERENT extern int dmam_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr, dma_addr_t device_addr, size_t size, int flags); extern void dmam_release_declared_memory(struct device *dev); -#else /* ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY */ +#else /* CONFIG_HAVE_GENERIC_DMA_COHERENT */ static inline int dmam_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr, dma_addr_t device_addr, size_t size, gfp_t gfp) @@ -617,7 +639,7 @@ static inline int dmam_declare_coherent_memory(struct device *dev, static inline void dmam_release_declared_memory(struct device *dev) { } -#endif /* ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY */ +#endif /* CONFIG_HAVE_GENERIC_DMA_COHERENT */ static inline void *dma_alloc_writecombine(struct device *dev, size_t size, dma_addr_t *dma_addr, gfp_t gfp) |