461db2bdbf
Switch the streaming DMA mapping and ownership transfer methods to the functionally identical dma_direct_ versions. Factor the cache maintainance helpers into the form expected by the common code for that. Signed-off-by: Christoph Hellwig <hch@lst.de> Tested-by: Christian Zigotzky <chzigotzky@xenosoft.de> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
63 lines
1.7 KiB
C
63 lines
1.7 KiB
C
/*
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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-direct.h>
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#include <linux/dma-debug.h>
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#include <linux/gfp.h>
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#include <linux/memblock.h>
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#include <linux/export.h>
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#include <linux/pci.h>
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#include <asm/vio.h>
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#include <asm/bug.h>
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#include <asm/machdep.h>
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#include <asm/swiotlb.h>
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#include <asm/iommu.h>
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/*
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* Generic direct DMA implementation
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*
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* This implementation supports a per-device offset that can be applied if
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* the address at which memory is visible to devices is not 0. Platform code
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* can set archdata.dma_data to an unsigned long holding the offset. By
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* default the offset is PCI_DRAM_OFFSET.
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*/
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const struct dma_map_ops dma_nommu_ops = {
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#ifdef CONFIG_NOT_COHERENT_CACHE
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.alloc = __dma_nommu_alloc_coherent,
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.free = __dma_nommu_free_coherent,
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#else
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.alloc = dma_direct_alloc,
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.free = dma_direct_free,
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#endif
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.map_sg = dma_direct_map_sg,
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.dma_supported = dma_direct_supported,
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.map_page = dma_direct_map_page,
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.get_required_mask = dma_direct_get_required_mask,
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#ifdef CONFIG_NOT_COHERENT_CACHE
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.unmap_sg = dma_direct_unmap_sg,
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.unmap_page = dma_direct_unmap_page,
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.sync_single_for_cpu = dma_direct_sync_single_for_cpu,
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.sync_single_for_device = dma_direct_sync_single_for_device,
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.sync_sg_for_cpu = dma_direct_sync_sg_for_cpu,
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.sync_sg_for_device = dma_direct_sync_sg_for_device,
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#endif
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};
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EXPORT_SYMBOL(dma_nommu_ops);
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static int __init dma_init(void)
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{
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#ifdef CONFIG_IBMVIO
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dma_debug_add_bus(&vio_bus_type);
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#endif
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return 0;
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}
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fs_initcall(dma_init);
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