62fdd7678a
The patch contains Intel IOMMU IA64 specific code. It defines new machvec dig_vtd, hooks for IOMMU, DMAR table detection, cache line flush function, etc. For a generic kernel with CONFIG_DMAR=y, if Intel IOMMU is detected, dig_vtd is used for machinve vector. Otherwise, kernel falls back to dig machine vector. Kernel parameter "machvec=dig" or "intel_iommu=off" can be used to force kernel to boot dig machine vector. Signed-off-by: Fenghua Yu <fenghua.yu@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
47 lines
1.2 KiB
C
47 lines
1.2 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/swiotlb.h>
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#include <asm/dma.h>
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#include <asm/iommu.h>
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#include <asm/machvec.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_op = swiotlb_dma_supported,
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};
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void __init pci_swiotlb_init(void)
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{
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if (!iommu_detected) {
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#ifdef CONFIG_IA64_GENERIC
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swiotlb = 1;
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printk(KERN_INFO "PCI-DMA: Re-initialize machine vector.\n");
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machvec_init("dig");
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swiotlb_init();
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dma_ops = &swiotlb_dma_ops;
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#else
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panic("Unable to find Intel IOMMU");
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#endif
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}
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}
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