diff options
Diffstat (limited to 'arch/blackfin/include/asm/dma-mapping.h')
| -rw-r--r-- | arch/blackfin/include/asm/dma-mapping.h | 51 |
1 files changed, 9 insertions, 42 deletions
diff --git a/arch/blackfin/include/asm/dma-mapping.h b/arch/blackfin/include/asm/dma-mapping.h index f9172ff30e5c..212cb80fd74b 100644 --- a/arch/blackfin/include/asm/dma-mapping.h +++ b/arch/blackfin/include/asm/dma-mapping.h @@ -44,13 +44,8 @@ dma_mapping_error(struct device *dev, dma_addr_t dma_addr) extern void __dma_sync(dma_addr_t addr, size_t size, enum dma_data_direction dir); static inline void -_dma_sync(dma_addr_t addr, size_t size, enum dma_data_direction dir) +__dma_sync_inline(dma_addr_t addr, size_t size, enum dma_data_direction dir) { - if (!__builtin_constant_p(dir)) { - __dma_sync(addr, size, dir); - return; - } - switch (dir) { case DMA_NONE: BUG(); @@ -64,14 +59,15 @@ _dma_sync(dma_addr_t addr, size_t size, enum dma_data_direction dir) break; } } +static inline void +_dma_sync(dma_addr_t addr, size_t size, enum dma_data_direction dir) +{ + if (__builtin_constant_p(dir)) + __dma_sync_inline(addr, size, dir); + else + __dma_sync(addr, size, dir); +} -/* - * Map a single buffer of the indicated size for DMA in streaming mode. - * The 32-bit bus address to use is returned. - * - * Once the device is given the dma address, the device owns this memory - * until either pci_unmap_single or pci_dma_sync_single is performed. - */ static inline dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size, enum dma_data_direction dir) @@ -88,14 +84,6 @@ dma_map_page(struct device *dev, struct page *page, return dma_map_single(dev, page_address(page) + offset, size, dir); } -/* - * Unmap a single streaming mode DMA translation. The dma_addr and size - * must match what was provided for in a previous pci_map_single call. All - * other usages are undefined. - * - * After this call, reads by the cpu to the buffer are guarenteed to see - * whatever the device wrote there. - */ static inline void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size, enum dma_data_direction dir) @@ -110,30 +98,9 @@ dma_unmap_page(struct device *dev, dma_addr_t dma_addr, size_t size, dma_unmap_single(dev, dma_addr, size, dir); } -/* - * Map a set of buffers described by scatterlist in streaming - * mode for DMA. This is the scather-gather version of the - * above pci_map_single interface. Here the scatter gather list - * elements are each tagged with the appropriate dma address - * and length. They are obtained via sg_dma_{address,length}(SG). - * - * NOTE: An implementation may be able to use a smaller number of - * DMA address/length pairs than there are SG table elements. - * (for example via virtual mapping capabilities) - * The routine returns the number of addr/length pairs actually - * used, at most nents. - * - * Device ownership issues as mentioned above for pci_map_single are - * the same here. - */ extern int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, enum dma_data_direction dir); -/* - * Unmap a set of streaming mode DMA translations. - * Again, cpu read rules concerning calls here are the same as for - * pci_unmap_single() above. - */ static inline void dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries, enum dma_data_direction dir) |