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| 2 | |
| 3 | * Copyright (C) 2009-2010 PetaLogix
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| 4 | * Copyright (C) 2006 Benjamin Herrenschmidt, IBM Corporation
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| 5 | *
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| 6 | * Provide default implementations of the DMA mapping callbacks for
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| 7 | * directly mapped busses.
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| 8 |
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| 9 |
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| 10 | #include <linux/device.h>
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| 11 | #include <linux/dma-map-ops.h>
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| 12 | #include <linux/gfp.h>
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| 13 | #include <linux/export.h>
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| 14 | #include <linux/bug.h>
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| 15 | #include <asm/cacheflush.h>
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| 16 |
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| 17 | static void __dma_sync(phys_addr_t paddr, size_t size,
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| 18 | enum dma_data_direction direction)
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| 19 | {
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| 20 | switch (direction) {
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| 21 | case DMA_TO_DEVICE:
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| 22 | case DMA_BIDIRECTIONAL:
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| 23 | flush_dcache_range(paddr, paddr + size);
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| 24 | break;
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| 25 | case DMA_FROM_DEVICE:
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| 26 | invalidate_dcache_range(paddr, paddr + size);
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| 27 | break;
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| 28 | default:
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| 29 | BUG();
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| 30 | }
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| 31 | }
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| 32 |
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| 33 | void arch_sync_dma_for_device(phys_addr_t paddr, size_t size,
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| 34 | enum dma_data_direction dir)
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| 35 | {
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| 36 | __dma_sync(paddr, size, dir);
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| 37 | }
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| 38 |
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| 39 | void arch_sync_dma_for_cpu(phys_addr_t paddr, size_t size,
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| 40 | enum dma_data_direction dir)
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| 41 | {
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| 42 | __dma_sync(paddr, size, dir);
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| 43 | }
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