d6bd3a39f7
As suggested by Muli Ben-Yehuda this function is moved to generic code as may be useful for all archs. [akpm@osdl.org: fix] Signed-off-by: Rolf Eike Beer <eike-kernel@sf-tec.de> Cc: Muli Ben-Yehuda <muli@il.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
45 lines
1.3 KiB
C
45 lines
1.3 KiB
C
/* Glue code to lib/swiotlb.c */
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#include <linux/pci.h>
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#include <linux/cache.h>
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#include <linux/module.h>
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#include <linux/dma-mapping.h>
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#include <asm/proto.h>
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#include <asm/swiotlb.h>
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#include <asm/dma.h>
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int swiotlb __read_mostly;
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EXPORT_SYMBOL(swiotlb);
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struct dma_mapping_ops swiotlb_dma_ops = {
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.mapping_error = swiotlb_dma_mapping_error,
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.alloc_coherent = swiotlb_alloc_coherent,
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.free_coherent = swiotlb_free_coherent,
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.map_single = swiotlb_map_single,
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.unmap_single = swiotlb_unmap_single,
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.sync_single_for_cpu = swiotlb_sync_single_for_cpu,
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.sync_single_for_device = swiotlb_sync_single_for_device,
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.sync_single_range_for_cpu = swiotlb_sync_single_range_for_cpu,
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.sync_single_range_for_device = swiotlb_sync_single_range_for_device,
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.sync_sg_for_cpu = swiotlb_sync_sg_for_cpu,
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.sync_sg_for_device = swiotlb_sync_sg_for_device,
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.map_sg = swiotlb_map_sg,
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.unmap_sg = swiotlb_unmap_sg,
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.dma_supported = NULL,
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};
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void pci_swiotlb_init(void)
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{
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/* don't initialize swiotlb if iommu=off (no_iommu=1) */
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if (!iommu_detected && !no_iommu && end_pfn > MAX_DMA32_PFN)
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swiotlb = 1;
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if (swiotlb_force)
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swiotlb = 1;
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if (swiotlb) {
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printk(KERN_INFO "PCI-DMA: Using software bounce buffering for IO (SWIOTLB)\n");
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swiotlb_init();
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dma_ops = &swiotlb_dma_ops;
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}
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}
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