diff options
Diffstat (limited to 'include/linux/dma-mapping.h')
| -rw-r--r-- | include/linux/dma-mapping.h | 54 |
1 files changed, 22 insertions, 32 deletions
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index f7d1eea32c78..330ad58fbf4d 100644 --- a/include/linux/dma-mapping.h +++ b/include/linux/dma-mapping.h @@ -15,11 +15,8 @@ /** * List of possible attributes associated with a DMA mapping. The semantics * of each attribute should be defined in Documentation/DMA-attributes.txt. - * - * DMA_ATTR_WRITE_BARRIER: DMA to a memory region with this attribute - * forces all pending DMA writes to complete. */ -#define DMA_ATTR_WRITE_BARRIER (1UL << 0) + /* * DMA_ATTR_WEAK_ORDERING: Specifies that reads and writes to the mapping * may be weakly ordered, that is that reads and writes may pass each other. @@ -131,6 +128,7 @@ struct dma_map_ops { int (*dma_supported)(struct device *dev, u64 mask); u64 (*get_required_mask)(struct device *dev); size_t (*max_mapping_size)(struct device *dev); + unsigned long (*get_merge_boundary)(struct device *dev); }; #define DMA_MAPPING_ERROR (~(dma_addr_t)0) @@ -149,11 +147,6 @@ static inline int valid_dma_direction(int dma_direction) (dma_direction == DMA_FROM_DEVICE)); } -static inline int is_device_dma_capable(struct device *dev) -{ - return dev->dma_mask != NULL && *dev->dma_mask != DMA_MASK_NONE; -} - #ifdef CONFIG_DMA_DECLARE_COHERENT /* * These three functions are only for dma allocator. @@ -166,7 +159,7 @@ 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(ssize_t size, dma_addr_t *dma_handle); +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); @@ -176,7 +169,7 @@ int dma_mmap_from_global_coherent(struct vm_area_struct *vma, void *cpu_addr, #define dma_release_from_dev_coherent(dev, order, vaddr) (0) #define dma_mmap_from_dev_coherent(dev, vma, vaddr, order, ret) (0) -static inline void *dma_alloc_from_global_coherent(ssize_t size, +static inline void *dma_alloc_from_global_coherent(struct device *dev, ssize_t size, dma_addr_t *dma_handle) { return NULL; @@ -462,11 +455,13 @@ int dma_get_sgtable_attrs(struct device *dev, struct sg_table *sgt, int dma_mmap_attrs(struct device *dev, struct vm_area_struct *vma, void *cpu_addr, dma_addr_t dma_addr, size_t size, unsigned long attrs); +bool dma_can_mmap(struct device *dev); int dma_supported(struct device *dev, u64 mask); int dma_set_mask(struct device *dev, u64 mask); int dma_set_coherent_mask(struct device *dev, u64 mask); u64 dma_get_required_mask(struct device *dev); size_t dma_max_mapping_size(struct device *dev); +unsigned long dma_get_merge_boundary(struct device *dev); #else /* CONFIG_HAS_DMA */ static inline dma_addr_t dma_map_page_attrs(struct device *dev, struct page *page, size_t offset, size_t size, @@ -552,6 +547,10 @@ static inline int dma_mmap_attrs(struct device *dev, struct vm_area_struct *vma, { return -ENXIO; } +static inline bool dma_can_mmap(struct device *dev) +{ + return false; +} static inline int dma_supported(struct device *dev, u64 mask) { return 0; @@ -572,11 +571,19 @@ static inline size_t dma_max_mapping_size(struct device *dev) { return 0; } +static inline unsigned long dma_get_merge_boundary(struct device *dev) +{ + return 0; +} #endif /* CONFIG_HAS_DMA */ static inline dma_addr_t dma_map_single_attrs(struct device *dev, void *ptr, size_t size, enum dma_data_direction dir, unsigned long attrs) { + /* DMA must never operate on areas that might be remapped. */ + if (dev_WARN_ONCE(dev, is_vmalloc_addr(ptr), + "rejecting DMA map of vmalloc memory\n")) + return DMA_MAPPING_ERROR; debug_dma_map_single(dev, ptr, size); return dma_map_page_attrs(dev, virt_to_page(ptr), offset_in_page(ptr), size, dir, attrs); @@ -615,16 +622,14 @@ extern int dma_common_mmap(struct device *dev, struct vm_area_struct *vma, void *cpu_addr, dma_addr_t dma_addr, size_t size, unsigned long attrs); +struct page **dma_common_find_pages(void *cpu_addr); void *dma_common_contiguous_remap(struct page *page, size_t size, - unsigned long vm_flags, pgprot_t prot, const void *caller); void *dma_common_pages_remap(struct page **pages, size_t size, - unsigned long vm_flags, pgprot_t prot, - const void *caller); -void dma_common_free_remap(void *cpu_addr, size_t size, unsigned long vm_flags); + pgprot_t prot, const void *caller); +void dma_common_free_remap(void *cpu_addr, size_t size); -int __init dma_atomic_pool_init(gfp_t gfp, pgprot_t prot); bool dma_in_atomic_pool(void *start, size_t size); void *dma_alloc_from_pool(size_t size, struct page **ret_page, gfp_t flags); bool dma_free_from_pool(void *start, size_t size); @@ -689,7 +694,7 @@ static inline int dma_coerce_mask_and_coherent(struct device *dev, u64 mask) */ static inline bool dma_addressing_limited(struct device *dev) { - return min_not_zero(dma_get_mask(dev), dev->bus_dma_mask) < + return min_not_zero(dma_get_mask(dev), dev->bus_dma_limit) < dma_get_required_mask(dev); } @@ -754,7 +759,6 @@ static inline int dma_get_cache_alignment(void) #ifdef CONFIG_DMA_DECLARE_COHERENT int dma_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr, dma_addr_t device_addr, size_t size); -void dma_release_declared_memory(struct device *dev); #else static inline int dma_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr, @@ -762,11 +766,6 @@ dma_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr, { return -ENOSYS; } - -static inline void -dma_release_declared_memory(struct device *dev) -{ -} #endif /* CONFIG_DMA_DECLARE_COHERENT */ static inline void *dmam_alloc_coherent(struct device *dev, size_t size, @@ -786,9 +785,6 @@ static inline void *dma_alloc_wc(struct device *dev, size_t size, return dma_alloc_attrs(dev, size, dma_addr, gfp, attrs); } -#ifndef dma_alloc_writecombine -#define dma_alloc_writecombine dma_alloc_wc -#endif static inline void dma_free_wc(struct device *dev, size_t size, void *cpu_addr, dma_addr_t dma_addr) @@ -796,9 +792,6 @@ static inline void dma_free_wc(struct device *dev, size_t size, return dma_free_attrs(dev, size, cpu_addr, dma_addr, DMA_ATTR_WRITE_COMBINE); } -#ifndef dma_free_writecombine -#define dma_free_writecombine dma_free_wc -#endif static inline int dma_mmap_wc(struct device *dev, struct vm_area_struct *vma, @@ -808,9 +801,6 @@ static inline int dma_mmap_wc(struct device *dev, return dma_mmap_attrs(dev, vma, cpu_addr, dma_addr, size, DMA_ATTR_WRITE_COMBINE); } -#ifndef dma_mmap_writecombine -#define dma_mmap_writecombine dma_mmap_wc -#endif #ifdef CONFIG_NEED_DMA_MAP_STATE #define DEFINE_DMA_UNMAP_ADDR(ADDR_NAME) dma_addr_t ADDR_NAME |
