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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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33 lines
871 B
C
33 lines
871 B
C
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#ifndef DMA_H
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#define DMA_H
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#include <asm/glue-cache.h>
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#ifndef MULTI_CACHE
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#define dmac_map_area __glue(_CACHE,_dma_map_area)
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#define dmac_unmap_area __glue(_CACHE,_dma_unmap_area)
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/*
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* These are private to the dma-mapping API. Do not use directly.
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* Their sole purpose is to ensure that data held in the cache
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* is visible to DMA, or data written by DMA to system memory is
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* visible to the CPU.
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*/
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extern void dmac_map_area(const void *, size_t, int);
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extern void dmac_unmap_area(const void *, size_t, int);
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#else
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/*
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* These are private to the dma-mapping API. Do not use directly.
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* Their sole purpose is to ensure that data held in the cache
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* is visible to DMA, or data written by DMA to system memory is
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* visible to the CPU.
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*/
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#define dmac_map_area cpu_cache.dma_map_area
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#define dmac_unmap_area cpu_cache.dma_unmap_area
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#endif
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#endif
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