36bb61346d
I included these operations vector cases for situations where we never need to do anything, the entries aren't filled in by any implementation, so we OOPS trying to invoke NULL pointer functions. Really make them NOPs, to fix the bug. Signed-off-by: David S. Miller <davem@davemloft.net>
155 lines
4.7 KiB
C
155 lines
4.7 KiB
C
#ifndef _ASM_SPARC64_DMA_MAPPING_H
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#define _ASM_SPARC64_DMA_MAPPING_H
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#include <linux/scatterlist.h>
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#include <linux/mm.h>
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#define DMA_ERROR_CODE (~(dma_addr_t)0x0)
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struct dma_ops {
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void *(*alloc_coherent)(struct device *dev, size_t size,
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dma_addr_t *dma_handle, gfp_t flag);
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void (*free_coherent)(struct device *dev, size_t size,
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void *cpu_addr, dma_addr_t dma_handle);
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dma_addr_t (*map_single)(struct device *dev, void *cpu_addr,
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size_t size,
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enum dma_data_direction direction);
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void (*unmap_single)(struct device *dev, dma_addr_t dma_addr,
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size_t size,
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enum dma_data_direction direction);
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int (*map_sg)(struct device *dev, struct scatterlist *sg, int nents,
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enum dma_data_direction direction);
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void (*unmap_sg)(struct device *dev, struct scatterlist *sg,
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int nhwentries,
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enum dma_data_direction direction);
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void (*sync_single_for_cpu)(struct device *dev,
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dma_addr_t dma_handle, size_t size,
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enum dma_data_direction direction);
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void (*sync_sg_for_cpu)(struct device *dev, struct scatterlist *sg,
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int nelems,
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enum dma_data_direction direction);
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};
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extern const struct dma_ops *dma_ops;
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extern int dma_supported(struct device *dev, u64 mask);
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extern int dma_set_mask(struct device *dev, u64 dma_mask);
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static inline void *dma_alloc_coherent(struct device *dev, size_t size,
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dma_addr_t *dma_handle, gfp_t flag)
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{
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return dma_ops->alloc_coherent(dev, size, dma_handle, flag);
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}
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static inline void dma_free_coherent(struct device *dev, size_t size,
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void *cpu_addr, dma_addr_t dma_handle)
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{
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dma_ops->free_coherent(dev, size, cpu_addr, dma_handle);
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}
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static inline dma_addr_t dma_map_single(struct device *dev, void *cpu_addr,
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size_t size,
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enum dma_data_direction direction)
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{
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return dma_ops->map_single(dev, cpu_addr, size, direction);
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}
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static inline void dma_unmap_single(struct device *dev, dma_addr_t dma_addr,
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size_t size,
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enum dma_data_direction direction)
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{
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dma_ops->unmap_single(dev, dma_addr, size, direction);
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}
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static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
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unsigned long offset, size_t size,
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enum dma_data_direction direction)
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{
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return dma_ops->map_single(dev, page_address(page) + offset,
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size, direction);
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}
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static inline void dma_unmap_page(struct device *dev, dma_addr_t dma_address,
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size_t size,
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enum dma_data_direction direction)
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{
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dma_ops->unmap_single(dev, dma_address, size, direction);
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}
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static inline int dma_map_sg(struct device *dev, struct scatterlist *sg,
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int nents, enum dma_data_direction direction)
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{
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return dma_ops->map_sg(dev, sg, nents, direction);
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}
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static inline void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
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int nents, enum dma_data_direction direction)
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{
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dma_ops->unmap_sg(dev, sg, nents, direction);
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}
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static inline void dma_sync_single_for_cpu(struct device *dev,
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dma_addr_t dma_handle, size_t size,
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enum dma_data_direction direction)
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{
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dma_ops->sync_single_for_cpu(dev, dma_handle, size, direction);
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}
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static inline void dma_sync_single_for_device(struct device *dev,
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dma_addr_t dma_handle,
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size_t size,
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enum dma_data_direction direction)
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{
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/* No flushing needed to sync cpu writes to the device. */
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}
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static inline void dma_sync_single_range_for_cpu(struct device *dev,
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dma_addr_t dma_handle,
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unsigned long offset,
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size_t size,
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enum dma_data_direction direction)
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{
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dma_sync_single_for_cpu(dev, dma_handle+offset, size, direction);
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}
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static inline void dma_sync_single_range_for_device(struct device *dev,
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dma_addr_t dma_handle,
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unsigned long offset,
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size_t size,
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enum dma_data_direction direction)
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{
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/* No flushing needed to sync cpu writes to the device. */
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}
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static inline void dma_sync_sg_for_cpu(struct device *dev,
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struct scatterlist *sg, int nelems,
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enum dma_data_direction direction)
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{
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dma_ops->sync_sg_for_cpu(dev, sg, nelems, direction);
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}
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static inline void dma_sync_sg_for_device(struct device *dev,
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struct scatterlist *sg, int nelems,
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enum dma_data_direction direction)
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{
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/* No flushing needed to sync cpu writes to the device. */
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}
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static inline int dma_mapping_error(dma_addr_t dma_addr)
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{
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return (dma_addr == DMA_ERROR_CODE);
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}
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static inline int dma_get_cache_alignment(void)
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{
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/* no easy way to get cache size on all processors, so return
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* the maximum possible, to be safe */
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return (1 << INTERNODE_CACHE_SHIFT);
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}
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#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
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#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
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#define dma_is_consistent(d, h) (1)
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#endif /* _ASM_SPARC64_DMA_MAPPING_H */
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