diff options
Diffstat (limited to 'kernel/arch/arc/include/asm/dma-mapping.h')
| -rw-r--r-- | kernel/arch/arc/include/asm/dma-mapping.h | 43 |
1 files changed, 12 insertions, 31 deletions
diff --git a/kernel/arch/arc/include/asm/dma-mapping.h b/kernel/arch/arc/include/asm/dma-mapping.h index 45b8e0cea..2d28ba939 100644 --- a/kernel/arch/arc/include/asm/dma-mapping.h +++ b/kernel/arch/arc/include/asm/dma-mapping.h @@ -14,23 +14,6 @@ #include <asm-generic/dma-coherent.h> #include <asm/cacheflush.h> -#ifndef CONFIG_ARC_PLAT_NEEDS_CPU_TO_DMA -/* - * dma_map_* API take cpu addresses, which is kernel logical address in the - * untranslated address space (0x8000_0000) based. The dma address (bus addr) - * ideally needs to be 0x0000_0000 based hence these glue routines. - * However given that intermediate bus bridges can ignore the high bit, we can - * do with these routines being no-ops. - * If a platform/device comes up which sriclty requires 0 based bus addr - * (e.g. AHB-PCI bridge on Angel4 board), then it can provide it's own versions - */ -#define plat_dma_addr_to_kernel(dev, addr) ((unsigned long)(addr)) -#define plat_kernel_addr_to_dma(dev, ptr) ((dma_addr_t)(ptr)) - -#else -#include <plat/dma_addr.h> -#endif - void *dma_alloc_noncoherent(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t gfp); @@ -94,7 +77,7 @@ dma_map_single(struct device *dev, void *cpu_addr, size_t size, enum dma_data_direction dir) { _dma_cache_sync((unsigned long)cpu_addr, size, dir); - return plat_kernel_addr_to_dma(dev, cpu_addr); + return (dma_addr_t)cpu_addr; } static inline void @@ -147,16 +130,14 @@ static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size, enum dma_data_direction dir) { - _dma_cache_sync(plat_dma_addr_to_kernel(dev, dma_handle), size, - DMA_FROM_DEVICE); + _dma_cache_sync(dma_handle, size, DMA_FROM_DEVICE); } static inline void dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size, enum dma_data_direction dir) { - _dma_cache_sync(plat_dma_addr_to_kernel(dev, dma_handle), size, - DMA_TO_DEVICE); + _dma_cache_sync(dma_handle, size, DMA_TO_DEVICE); } static inline void @@ -164,8 +145,7 @@ 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_cache_sync(plat_dma_addr_to_kernel(dev, dma_handle) + offset, - size, DMA_FROM_DEVICE); + _dma_cache_sync(dma_handle + offset, size, DMA_FROM_DEVICE); } static inline void @@ -173,27 +153,28 @@ 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_cache_sync(plat_dma_addr_to_kernel(dev, dma_handle) + offset, - size, DMA_TO_DEVICE); + _dma_cache_sync(dma_handle + offset, size, DMA_TO_DEVICE); } static inline void -dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems, +dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sglist, int nelems, enum dma_data_direction dir) { int i; + struct scatterlist *sg; - for (i = 0; i < nelems; i++, sg++) + for_each_sg(sglist, sg, nelems, i) _dma_cache_sync((unsigned int)sg_virt(sg), sg->length, dir); } static inline void -dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems, - enum dma_data_direction dir) +dma_sync_sg_for_device(struct device *dev, struct scatterlist *sglist, + int nelems, enum dma_data_direction dir) { int i; + struct scatterlist *sg; - for (i = 0; i < nelems; i++, sg++) + for_each_sg(sglist, sg, nelems, i) _dma_cache_sync((unsigned int)sg_virt(sg), sg->length, dir); } |