diff options
Diffstat (limited to 'arch/arc/include/asm')
| -rw-r--r-- | arch/arc/include/asm/dma-mapping.h | 187 |
1 files changed, 4 insertions, 183 deletions
diff --git a/arch/arc/include/asm/dma-mapping.h b/arch/arc/include/asm/dma-mapping.h index 2d28ba939d8e..2a617f9c1e92 100644 --- a/arch/arc/include/asm/dma-mapping.h +++ b/arch/arc/include/asm/dma-mapping.h @@ -11,192 +11,13 @@ #ifndef ASM_ARC_DMA_MAPPING_H #define ASM_ARC_DMA_MAPPING_H -#include <asm-generic/dma-coherent.h> -#include <asm/cacheflush.h> +extern struct dma_map_ops arc_dma_ops; -void *dma_alloc_noncoherent(struct device *dev, size_t size, - dma_addr_t *dma_handle, gfp_t gfp); - -void dma_free_noncoherent(struct device *dev, size_t size, void *vaddr, - dma_addr_t dma_handle); - -void *dma_alloc_coherent(struct device *dev, size_t size, - dma_addr_t *dma_handle, gfp_t gfp); - -void dma_free_coherent(struct device *dev, size_t size, void *kvaddr, - dma_addr_t dma_handle); - -/* drivers/base/dma-mapping.c */ -extern int dma_common_mmap(struct device *dev, struct vm_area_struct *vma, - void *cpu_addr, dma_addr_t dma_addr, size_t size); -extern int dma_common_get_sgtable(struct device *dev, struct sg_table *sgt, - void *cpu_addr, dma_addr_t dma_addr, - size_t size); - -#define dma_mmap_coherent(d, v, c, h, s) dma_common_mmap(d, v, c, h, s) -#define dma_get_sgtable(d, t, v, h, s) dma_common_get_sgtable(d, t, v, h, s) - -/* - * streaming DMA Mapping API... - * CPU accesses page via normal paddr, thus needs to explicitly made - * consistent before each use - */ - -static inline void __inline_dma_cache_sync(unsigned long paddr, size_t size, - enum dma_data_direction dir) -{ - switch (dir) { - case DMA_FROM_DEVICE: - dma_cache_inv(paddr, size); - break; - case DMA_TO_DEVICE: - dma_cache_wback(paddr, size); - break; - case DMA_BIDIRECTIONAL: - dma_cache_wback_inv(paddr, size); - break; - default: - pr_err("Invalid DMA dir [%d] for OP @ %lx\n", dir, paddr); - } -} - -void __arc_dma_cache_sync(unsigned long paddr, size_t size, - enum dma_data_direction dir); - -#define _dma_cache_sync(addr, sz, dir) \ -do { \ - if (__builtin_constant_p(dir)) \ - __inline_dma_cache_sync(addr, sz, dir); \ - else \ - __arc_dma_cache_sync(addr, sz, dir); \ -} \ -while (0); - -static inline dma_addr_t -dma_map_single(struct device *dev, void *cpu_addr, size_t size, - enum dma_data_direction dir) -{ - _dma_cache_sync((unsigned long)cpu_addr, size, dir); - return (dma_addr_t)cpu_addr; -} - -static inline void -dma_unmap_single(struct device *dev, dma_addr_t dma_addr, - size_t size, enum dma_data_direction dir) -{ -} - -static inline dma_addr_t -dma_map_page(struct device *dev, struct page *page, - unsigned long offset, size_t size, - enum dma_data_direction dir) -{ - unsigned long paddr = page_to_phys(page) + offset; - return dma_map_single(dev, (void *)paddr, size, dir); -} - -static inline void -dma_unmap_page(struct device *dev, dma_addr_t dma_handle, - size_t size, enum dma_data_direction dir) -{ -} - -static inline int -dma_map_sg(struct device *dev, struct scatterlist *sg, - int nents, enum dma_data_direction dir) -{ - struct scatterlist *s; - int i; - - for_each_sg(sg, s, nents, i) - s->dma_address = dma_map_page(dev, sg_page(s), s->offset, - s->length, dir); - - return nents; -} - -static inline void -dma_unmap_sg(struct device *dev, struct scatterlist *sg, - int nents, enum dma_data_direction dir) +static inline struct dma_map_ops *get_dma_ops(struct device *dev) { - struct scatterlist *s; - int i; - - for_each_sg(sg, s, nents, i) - dma_unmap_page(dev, sg_dma_address(s), sg_dma_len(s), dir); -} - -static inline void -dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, - size_t size, enum dma_data_direction dir) -{ - _dma_cache_sync(dma_handle, size, DMA_FROM_DEVICE); -} - -static inline void -dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, - size_t size, enum dma_data_direction dir) -{ - _dma_cache_sync(dma_handle, size, DMA_TO_DEVICE); -} - -static inline void -dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle, - unsigned long offset, size_t size, - enum dma_data_direction direction) -{ - _dma_cache_sync(dma_handle + offset, size, DMA_FROM_DEVICE); -} - -static inline void -dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle, - unsigned long offset, size_t size, - enum dma_data_direction direction) -{ - _dma_cache_sync(dma_handle + offset, size, DMA_TO_DEVICE); + return &arc_dma_ops; } -static inline void -dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sglist, int nelems, - enum dma_data_direction dir) -{ - int i; - struct scatterlist *sg; - - for_each_sg(sglist, sg, nelems, i) - _dma_cache_sync((unsigned int)sg_virt(sg), sg->length, dir); -} - -static inline void -dma_sync_sg_for_device(struct device *dev, struct scatterlist *sglist, - int nelems, enum dma_data_direction dir) -{ - int i; - struct scatterlist *sg; - - for_each_sg(sglist, sg, nelems, i) - _dma_cache_sync((unsigned int)sg_virt(sg), sg->length, dir); -} - -static inline int dma_supported(struct device *dev, u64 dma_mask) -{ - /* Support 32 bit DMA mask exclusively */ - return dma_mask == DMA_BIT_MASK(32); -} - -static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr) -{ - return 0; -} - -static inline int dma_set_mask(struct device *dev, u64 dma_mask) -{ - if (!dev->dma_mask || !dma_supported(dev, dma_mask)) - return -EIO; - - *dev->dma_mask = dma_mask; - - return 0; -} +#include <asm-generic/dma-mapping-common.h> #endif |