diff options
Diffstat (limited to 'include/asm-x86/dma-mapping.h')
| -rw-r--r-- | include/asm-x86/dma-mapping.h | 308 |
1 files changed, 0 insertions, 308 deletions
diff --git a/include/asm-x86/dma-mapping.h b/include/asm-x86/dma-mapping.h deleted file mode 100644 index 219c33d6361..00000000000 --- a/include/asm-x86/dma-mapping.h +++ /dev/null @@ -1,308 +0,0 @@ -#ifndef ASM_X86__DMA_MAPPING_H -#define ASM_X86__DMA_MAPPING_H - -/* - * IOMMU interface. See Documentation/DMA-mapping.txt and DMA-API.txt for - * documentation. - */ - -#include <linux/scatterlist.h> -#include <asm/io.h> -#include <asm/swiotlb.h> -#include <asm-generic/dma-coherent.h> - -extern dma_addr_t bad_dma_address; -extern int iommu_merge; -extern struct device x86_dma_fallback_dev; -extern int panic_on_overflow; - -struct dma_mapping_ops { - int (*mapping_error)(struct device *dev, - dma_addr_t dma_addr); - void* (*alloc_coherent)(struct device *dev, size_t size, - dma_addr_t *dma_handle, gfp_t gfp); - void (*free_coherent)(struct device *dev, size_t size, - void *vaddr, dma_addr_t dma_handle); - dma_addr_t (*map_single)(struct device *hwdev, phys_addr_t ptr, - size_t size, int direction); - void (*unmap_single)(struct device *dev, dma_addr_t addr, - size_t size, int direction); - void (*sync_single_for_cpu)(struct device *hwdev, - dma_addr_t dma_handle, size_t size, - int direction); - void (*sync_single_for_device)(struct device *hwdev, - dma_addr_t dma_handle, size_t size, - int direction); - void (*sync_single_range_for_cpu)(struct device *hwdev, - dma_addr_t dma_handle, unsigned long offset, - size_t size, int direction); - void (*sync_single_range_for_device)(struct device *hwdev, - dma_addr_t dma_handle, unsigned long offset, - size_t size, int direction); - void (*sync_sg_for_cpu)(struct device *hwdev, - struct scatterlist *sg, int nelems, - int direction); - void (*sync_sg_for_device)(struct device *hwdev, - struct scatterlist *sg, int nelems, - int direction); - int (*map_sg)(struct device *hwdev, struct scatterlist *sg, - int nents, int direction); - void (*unmap_sg)(struct device *hwdev, - struct scatterlist *sg, int nents, - int direction); - int (*dma_supported)(struct device *hwdev, u64 mask); - int is_phys; -}; - -extern struct dma_mapping_ops *dma_ops; - -static inline struct dma_mapping_ops *get_dma_ops(struct device *dev) -{ -#ifdef CONFIG_X86_32 - return dma_ops; -#else - if (unlikely(!dev) || !dev->archdata.dma_ops) - return dma_ops; - else - return dev->archdata.dma_ops; -#endif /* ASM_X86__DMA_MAPPING_H */ -} - -/* Make sure we keep the same behaviour */ -static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr) -{ -#ifdef CONFIG_X86_32 - return 0; -#else - struct dma_mapping_ops *ops = get_dma_ops(dev); - if (ops->mapping_error) - return ops->mapping_error(dev, dma_addr); - - return (dma_addr == bad_dma_address); -#endif -} - -#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) -#define dma_is_consistent(d, h) (1) - -extern int dma_supported(struct device *hwdev, u64 mask); -extern int dma_set_mask(struct device *dev, u64 mask); - -extern void *dma_generic_alloc_coherent(struct device *dev, size_t size, - dma_addr_t *dma_addr, gfp_t flag); - -static inline dma_addr_t -dma_map_single(struct device *hwdev, void *ptr, size_t size, - int direction) -{ - struct dma_mapping_ops *ops = get_dma_ops(hwdev); - - BUG_ON(!valid_dma_direction(direction)); - return ops->map_single(hwdev, virt_to_phys(ptr), size, direction); -} - -static inline void -dma_unmap_single(struct device *dev, dma_addr_t addr, size_t size, - int direction) -{ - struct dma_mapping_ops *ops = get_dma_ops(dev); - - BUG_ON(!valid_dma_direction(direction)); - if (ops->unmap_single) - ops->unmap_single(dev, addr, size, direction); -} - -static inline int -dma_map_sg(struct device *hwdev, struct scatterlist *sg, - int nents, int direction) -{ - struct dma_mapping_ops *ops = get_dma_ops(hwdev); - - BUG_ON(!valid_dma_direction(direction)); - return ops->map_sg(hwdev, sg, nents, direction); -} - -static inline void -dma_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents, - int direction) -{ - struct dma_mapping_ops *ops = get_dma_ops(hwdev); - - BUG_ON(!valid_dma_direction(direction)); - if (ops->unmap_sg) - ops->unmap_sg(hwdev, sg, nents, direction); -} - -static inline void -dma_sync_single_for_cpu(struct device *hwdev, dma_addr_t dma_handle, - size_t size, int direction) -{ - struct dma_mapping_ops *ops = get_dma_ops(hwdev); - - BUG_ON(!valid_dma_direction(direction)); - if (ops->sync_single_for_cpu) - ops->sync_single_for_cpu(hwdev, dma_handle, size, direction); - flush_write_buffers(); -} - -static inline void -dma_sync_single_for_device(struct device *hwdev, dma_addr_t dma_handle, - size_t size, int direction) -{ - struct dma_mapping_ops *ops = get_dma_ops(hwdev); - - BUG_ON(!valid_dma_direction(direction)); - if (ops->sync_single_for_device) - ops->sync_single_for_device(hwdev, dma_handle, size, direction); - flush_write_buffers(); -} - -static inline void -dma_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dma_handle, - unsigned long offset, size_t size, int direction) -{ - struct dma_mapping_ops *ops = get_dma_ops(hwdev); - - BUG_ON(!valid_dma_direction(direction)); - if (ops->sync_single_range_for_cpu) - ops->sync_single_range_for_cpu(hwdev, dma_handle, offset, - size, direction); - flush_write_buffers(); -} - -static inline void -dma_sync_single_range_for_device(struct device *hwdev, dma_addr_t dma_handle, - unsigned long offset, size_t size, - int direction) -{ - struct dma_mapping_ops *ops = get_dma_ops(hwdev); - - BUG_ON(!valid_dma_direction(direction)); - if (ops->sync_single_range_for_device) - ops->sync_single_range_for_device(hwdev, dma_handle, - offset, size, direction); - flush_write_buffers(); -} - -static inline void -dma_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg, - int nelems, int direction) -{ - struct dma_mapping_ops *ops = get_dma_ops(hwdev); - - BUG_ON(!valid_dma_direction(direction)); - if (ops->sync_sg_for_cpu) - ops->sync_sg_for_cpu(hwdev, sg, nelems, direction); - flush_write_buffers(); -} - -static inline void -dma_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg, - int nelems, int direction) -{ - struct dma_mapping_ops *ops = get_dma_ops(hwdev); - - BUG_ON(!valid_dma_direction(direction)); - if (ops->sync_sg_for_device) - ops->sync_sg_for_device(hwdev, sg, nelems, direction); - - flush_write_buffers(); -} - -static inline dma_addr_t dma_map_page(struct device *dev, struct page *page, - size_t offset, size_t size, - int direction) -{ - struct dma_mapping_ops *ops = get_dma_ops(dev); - - BUG_ON(!valid_dma_direction(direction)); - return ops->map_single(dev, page_to_phys(page) + offset, - size, direction); -} - -static inline void dma_unmap_page(struct device *dev, dma_addr_t addr, - size_t size, int direction) -{ - dma_unmap_single(dev, addr, size, direction); -} - -static inline void -dma_cache_sync(struct device *dev, void *vaddr, size_t size, - enum dma_data_direction dir) -{ - flush_write_buffers(); -} - -static inline int dma_get_cache_alignment(void) -{ - /* no easy way to get cache size on all x86, so return the - * maximum possible, to be safe */ - return boot_cpu_data.x86_clflush_size; -} - -static inline unsigned long dma_alloc_coherent_mask(struct device *dev, - gfp_t gfp) -{ - unsigned long dma_mask = 0; - - dma_mask = dev->coherent_dma_mask; - if (!dma_mask) - dma_mask = (gfp & GFP_DMA) ? DMA_24BIT_MASK : DMA_32BIT_MASK; - - return dma_mask; -} - -static inline gfp_t dma_alloc_coherent_gfp_flags(struct device *dev, gfp_t gfp) -{ -#ifdef CONFIG_X86_64 - unsigned long dma_mask = dma_alloc_coherent_mask(dev, gfp); - - if (dma_mask <= DMA_32BIT_MASK && !(gfp & GFP_DMA)) - gfp |= GFP_DMA32; -#endif - return gfp; -} - -static inline void * -dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, - gfp_t gfp) -{ - struct dma_mapping_ops *ops = get_dma_ops(dev); - void *memory; - - gfp &= ~(__GFP_DMA | __GFP_HIGHMEM | __GFP_DMA32); - - if (dma_alloc_from_coherent(dev, size, dma_handle, &memory)) - return memory; - - if (!dev) { - dev = &x86_dma_fallback_dev; - gfp |= GFP_DMA; - } - - if (!is_device_dma_capable(dev)) - return NULL; - - if (!ops->alloc_coherent) - return NULL; - - return ops->alloc_coherent(dev, size, dma_handle, - dma_alloc_coherent_gfp_flags(dev, gfp)); -} - -static inline void dma_free_coherent(struct device *dev, size_t size, - void *vaddr, dma_addr_t bus) -{ - struct dma_mapping_ops *ops = get_dma_ops(dev); - - WARN_ON(irqs_disabled()); /* for portability */ - - if (dma_release_from_coherent(dev, get_order(size), vaddr)) - return; - - if (ops->free_coherent) - ops->free_coherent(dev, size, vaddr, bus); -} - -#endif |