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43 lines
972 B
43 lines
972 B
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Copyright (C) 2009-2010 PetaLogix |
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* Copyright (C) 2006 Benjamin Herrenschmidt, IBM Corporation |
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* |
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* Provide default implementations of the DMA mapping callbacks for |
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* directly mapped busses. |
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*/ |
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#include <linux/device.h> |
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#include <linux/dma-map-ops.h> |
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#include <linux/gfp.h> |
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#include <linux/export.h> |
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#include <linux/bug.h> |
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#include <asm/cacheflush.h> |
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static void __dma_sync(phys_addr_t paddr, size_t size, |
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enum dma_data_direction direction) |
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{ |
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switch (direction) { |
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case DMA_TO_DEVICE: |
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case DMA_BIDIRECTIONAL: |
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flush_dcache_range(paddr, paddr + size); |
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break; |
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case DMA_FROM_DEVICE: |
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invalidate_dcache_range(paddr, paddr + size); |
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break; |
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default: |
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BUG(); |
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} |
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} |
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void arch_sync_dma_for_device(phys_addr_t paddr, size_t size, |
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enum dma_data_direction dir) |
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{ |
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__dma_sync(paddr, size, dir); |
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} |
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void arch_sync_dma_for_cpu(phys_addr_t paddr, size_t size, |
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enum dma_data_direction dir) |
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{ |
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__dma_sync(paddr, size, dir); |
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}
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