diff options
| author | Christoph Hellwig <hch@lst.de> | 2017-08-27 10:12:57 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2017-10-19 16:37:25 +0200 |
| commit | 64dc8700c01d94c46fd26b38b7e7d2891934a33b (patch) | |
| tree | e92980b34228b26ed64930f26e2a471914e61776 /arch/microblaze/include | |
| parent | ia64: make dma_cache_sync a no-op (diff) | |
| download | linux-64dc8700c01d94c46fd26b38b7e7d2891934a33b.tar.xz linux-64dc8700c01d94c46fd26b38b7e7d2891934a33b.zip | |
microblaze: make dma_cache_sync a no-op
microblaze does not implement DMA_ATTR_NON_CONSISTENT allocations, so it
doesn't make any sense to do any work in dma_cache_sync given that it
must be a no-op when dma_alloc_attrs returns coherent memory.
This also allows moving __dma_sync out of the microblaze asm/dma-mapping.h
and thus greatly reduce the amount of includes there.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Diffstat (limited to 'arch/microblaze/include')
| -rw-r--r-- | arch/microblaze/include/asm/dma-mapping.h | 34 |
1 files changed, 0 insertions, 34 deletions
diff --git a/arch/microblaze/include/asm/dma-mapping.h b/arch/microblaze/include/asm/dma-mapping.h index e15cd2f76e23..ad448e4aedb6 100644 --- a/arch/microblaze/include/asm/dma-mapping.h +++ b/arch/microblaze/include/asm/dma-mapping.h @@ -16,22 +16,6 @@ #define _ASM_MICROBLAZE_DMA_MAPPING_H /* - * See Documentation/DMA-API-HOWTO.txt and - * Documentation/DMA-API.txt for documentation. - */ - -#include <linux/types.h> -#include <linux/cache.h> -#include <linux/mm.h> -#include <linux/scatterlist.h> -#include <linux/dma-debug.h> -#include <asm/io.h> -#include <asm/cacheflush.h> - -#define __dma_alloc_coherent(dev, gfp, size, handle) NULL -#define __dma_free_coherent(size, addr) ((void)0) - -/* * Available generic sets of operations */ extern const struct dma_map_ops dma_direct_ops; @@ -41,27 +25,9 @@ static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus) return &dma_direct_ops; } -static inline void __dma_sync(unsigned long paddr, - size_t size, enum dma_data_direction direction) -{ - switch (direction) { - case DMA_TO_DEVICE: - case DMA_BIDIRECTIONAL: - flush_dcache_range(paddr, paddr + size); - break; - case DMA_FROM_DEVICE: - invalidate_dcache_range(paddr, paddr + size); - break; - default: - BUG(); - } -} - static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size, enum dma_data_direction direction) { - BUG_ON(direction == DMA_NONE); - __dma_sync(virt_to_phys(vaddr), size, (int)direction); } #endif /* _ASM_MICROBLAZE_DMA_MAPPING_H */ |