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Diffstat (limited to 'include/asm-x86/dma-mapping_64.h')
| -rw-r--r-- | include/asm-x86/dma-mapping_64.h | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/include/asm-x86/dma-mapping_64.h b/include/asm-x86/dma-mapping_64.h new file mode 100644 index 0000000..6897e2a --- /dev/null +++ b/include/asm-x86/dma-mapping_64.h @@ -0,0 +1,203 @@ +#ifndef _X8664_DMA_MAPPING_H +#define _X8664_DMA_MAPPING_H 1 + +/* + * IOMMU interface. See Documentation/DMA-mapping.txt and DMA-API.txt for + * documentation. + */ + + +#include <asm/scatterlist.h> +#include <asm/io.h> +#include <asm/swiotlb.h> + +struct dma_mapping_ops { + int (*mapping_error)(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, void *ptr, + size_t size, int direction); + /* like map_single, but doesn't check the device mask */ + dma_addr_t (*map_simple)(struct device *hwdev, char *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 dma_addr_t bad_dma_address; +extern const struct dma_mapping_ops* dma_ops; +extern int iommu_merge; + +static inline int dma_mapping_error(dma_addr_t dma_addr) +{ + if (dma_ops->mapping_error) + return dma_ops->mapping_error(dma_addr); + + return (dma_addr == bad_dma_address); +} + +#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_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) + +extern void *dma_alloc_coherent(struct device *dev, size_t size, + dma_addr_t *dma_handle, gfp_t gfp); +extern void dma_free_coherent(struct device *dev, size_t size, void *vaddr, + dma_addr_t dma_handle); + +static inline dma_addr_t +dma_map_single(struct device *hwdev, void *ptr, size_t size, + int direction) +{ + BUG_ON(!valid_dma_direction(direction)); + return dma_ops->map_single(hwdev, ptr, size, direction); +} + +static inline void +dma_unmap_single(struct device *dev, dma_addr_t addr,size_t size, + int direction) +{ + BUG_ON(!valid_dma_direction(direction)); + dma_ops->unmap_single(dev, addr, size, direction); +} + +#define dma_map_page(dev,page,offset,size,dir) \ + dma_map_single((dev), page_address(page)+(offset), (size), (dir)) + +#define dma_unmap_page dma_unmap_single + +static inline void +dma_sync_single_for_cpu(struct device *hwdev, dma_addr_t dma_handle, + size_t size, int direction) +{ + BUG_ON(!valid_dma_direction(direction)); + if (dma_ops->sync_single_for_cpu) + dma_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) +{ + BUG_ON(!valid_dma_direction(direction)); + if (dma_ops->sync_single_for_device) + dma_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) +{ + BUG_ON(!valid_dma_direction(direction)); + if (dma_ops->sync_single_range_for_cpu) { + dma_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) +{ + BUG_ON(!valid_dma_direction(direction)); + if (dma_ops->sync_single_range_for_device) + dma_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) +{ + BUG_ON(!valid_dma_direction(direction)); + if (dma_ops->sync_sg_for_cpu) + dma_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) +{ + BUG_ON(!valid_dma_direction(direction)); + if (dma_ops->sync_sg_for_device) { + dma_ops->sync_sg_for_device(hwdev, sg, nelems, direction); + } + + flush_write_buffers(); +} + +static inline int +dma_map_sg(struct device *hwdev, struct scatterlist *sg, int nents, int direction) +{ + BUG_ON(!valid_dma_direction(direction)); + return dma_ops->map_sg(hwdev, sg, nents, direction); +} + +static inline void +dma_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents, + int direction) +{ + BUG_ON(!valid_dma_direction(direction)); + dma_ops->unmap_sg(hwdev, sg, nents, direction); +} + +extern int dma_supported(struct device *hwdev, u64 mask); + +/* same for gart, swiotlb, and nommu */ +static inline int dma_get_cache_alignment(void) +{ + return boot_cpu_data.x86_clflush_size; +} + +#define dma_is_consistent(d, h) 1 + +extern int dma_set_mask(struct device *dev, u64 mask); + +static inline void +dma_cache_sync(struct device *dev, void *vaddr, size_t size, + enum dma_data_direction dir) +{ + flush_write_buffers(); +} + +extern struct device fallback_dev; +extern int panic_on_overflow; + +#endif /* _X8664_DMA_MAPPING_H */ |
