/Ethereal-msm8939-beta9/arch/metag/include/asm/dma-mapping.h
https://bitbucket.org/MilosStamenkovic95/etherealos · C Header · 190 lines · 148 code · 37 blank · 5 comment · 11 complexity · f2aec3be9c0251265a03247f03579c3e MD5 · raw file
- #ifndef _ASM_METAG_DMA_MAPPING_H
- #define _ASM_METAG_DMA_MAPPING_H
- #include <linux/mm.h>
- #include <asm/cache.h>
- #include <asm/io.h>
- #include <linux/scatterlist.h>
- #include <asm/bug.h>
- #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
- #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
- void *dma_alloc_coherent(struct device *dev, size_t size,
- dma_addr_t *dma_handle, gfp_t flag);
- void dma_free_coherent(struct device *dev, size_t size,
- void *vaddr, dma_addr_t dma_handle);
- void dma_sync_for_device(void *vaddr, size_t size, int dma_direction);
- void dma_sync_for_cpu(void *vaddr, size_t size, int dma_direction);
- int dma_mmap_coherent(struct device *dev, struct vm_area_struct *vma,
- void *cpu_addr, dma_addr_t dma_addr, size_t size);
- int dma_mmap_writecombine(struct device *dev, struct vm_area_struct *vma,
- void *cpu_addr, dma_addr_t dma_addr, size_t size);
- static inline dma_addr_t
- dma_map_single(struct device *dev, void *ptr, size_t size,
- enum dma_data_direction direction)
- {
- BUG_ON(!valid_dma_direction(direction));
- WARN_ON(size == 0);
- dma_sync_for_device(ptr, size, direction);
- return virt_to_phys(ptr);
- }
- static inline void
- dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
- enum dma_data_direction direction)
- {
- BUG_ON(!valid_dma_direction(direction));
- dma_sync_for_cpu(phys_to_virt(dma_addr), size, direction);
- }
- static inline int
- dma_map_sg(struct device *dev, struct scatterlist *sglist, int nents,
- enum dma_data_direction direction)
- {
- struct scatterlist *sg;
- int i;
- BUG_ON(!valid_dma_direction(direction));
- WARN_ON(nents == 0 || sglist[0].length == 0);
- for_each_sg(sglist, sg, nents, i) {
- BUG_ON(!sg_page(sg));
- sg->dma_address = sg_phys(sg);
- dma_sync_for_device(sg_virt(sg), sg->length, direction);
- }
- return nents;
- }
- static inline dma_addr_t
- dma_map_page(struct device *dev, struct page *page, unsigned long offset,
- size_t size, enum dma_data_direction direction)
- {
- BUG_ON(!valid_dma_direction(direction));
- dma_sync_for_device((void *)(page_to_phys(page) + offset), size,
- direction);
- return page_to_phys(page) + offset;
- }
- static inline void
- dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
- enum dma_data_direction direction)
- {
- BUG_ON(!valid_dma_direction(direction));
- dma_sync_for_cpu(phys_to_virt(dma_address), size, direction);
- }
- static inline void
- dma_unmap_sg(struct device *dev, struct scatterlist *sglist, int nhwentries,
- enum dma_data_direction direction)
- {
- struct scatterlist *sg;
- int i;
- BUG_ON(!valid_dma_direction(direction));
- WARN_ON(nhwentries == 0 || sglist[0].length == 0);
- for_each_sg(sglist, sg, nhwentries, i) {
- BUG_ON(!sg_page(sg));
- sg->dma_address = sg_phys(sg);
- dma_sync_for_cpu(sg_virt(sg), sg->length, direction);
- }
- }
- static inline void
- dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
- enum dma_data_direction direction)
- {
- dma_sync_for_cpu(phys_to_virt(dma_handle), size, direction);
- }
- static inline void
- dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle,
- size_t size, enum dma_data_direction direction)
- {
- dma_sync_for_device(phys_to_virt(dma_handle), size, direction);
- }
- 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_sync_for_cpu(phys_to_virt(dma_handle)+offset, size,
- direction);
- }
- 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_sync_for_device(phys_to_virt(dma_handle)+offset, size,
- direction);
- }
- static inline void
- dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
- enum dma_data_direction direction)
- {
- int i;
- for (i = 0; i < nelems; i++, sg++)
- dma_sync_for_cpu(sg_virt(sg), sg->length, direction);
- }
- static inline void
- dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
- enum dma_data_direction direction)
- {
- int i;
- for (i = 0; i < nelems; i++, sg++)
- dma_sync_for_device(sg_virt(sg), sg->length, direction);
- }
- static inline int
- dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
- {
- return 0;
- }
- #define dma_supported(dev, mask) (1)
- static inline int
- dma_set_mask(struct device *dev, u64 mask)
- {
- if (!dev->dma_mask || !dma_supported(dev, mask))
- return -EIO;
- *dev->dma_mask = mask;
- return 0;
- }
- /*
- * dma_alloc_noncoherent() returns non-cacheable memory, so there's no need to
- * do any flushing here.
- */
- static inline void
- dma_cache_sync(struct device *dev, void *vaddr, size_t size,
- enum dma_data_direction direction)
- {
- }
- /* drivers/base/dma-mapping.c */
- 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_get_sgtable(d, t, v, h, s) dma_common_get_sgtable(d, t, v, h, s)
- #endif