From 62fdd7678a26efadd6ac5c2869543caff77d2df0 Mon Sep 17 00:00:00 2001 From: Fenghua Yu Date: Fri, 17 Oct 2008 12:14:13 -0700 Subject: [IA64] Add Variable Page Size and IA64 Support in Intel IOMMU 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 Signed-off-by: Tony Luck --- arch/ia64/kernel/pci-swiotlb.c | 46 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 arch/ia64/kernel/pci-swiotlb.c (limited to 'arch/ia64/kernel/pci-swiotlb.c') diff --git a/arch/ia64/kernel/pci-swiotlb.c b/arch/ia64/kernel/pci-swiotlb.c new file mode 100644 index 00000000000..16c50516dbc --- /dev/null +++ b/arch/ia64/kernel/pci-swiotlb.c @@ -0,0 +1,46 @@ +/* Glue code to lib/swiotlb.c */ + +#include +#include +#include +#include + +#include +#include +#include +#include + +int swiotlb __read_mostly; +EXPORT_SYMBOL(swiotlb); + +struct dma_mapping_ops swiotlb_dma_ops = { + .mapping_error = swiotlb_dma_mapping_error, + .alloc_coherent = swiotlb_alloc_coherent, + .free_coherent = swiotlb_free_coherent, + .map_single = swiotlb_map_single, + .unmap_single = swiotlb_unmap_single, + .sync_single_for_cpu = swiotlb_sync_single_for_cpu, + .sync_single_for_device = swiotlb_sync_single_for_device, + .sync_single_range_for_cpu = swiotlb_sync_single_range_for_cpu, + .sync_single_range_for_device = swiotlb_sync_single_range_for_device, + .sync_sg_for_cpu = swiotlb_sync_sg_for_cpu, + .sync_sg_for_device = swiotlb_sync_sg_for_device, + .map_sg = swiotlb_map_sg, + .unmap_sg = swiotlb_unmap_sg, + .dma_supported_op = swiotlb_dma_supported, +}; + +void __init pci_swiotlb_init(void) +{ + if (!iommu_detected) { +#ifdef CONFIG_IA64_GENERIC + swiotlb = 1; + printk(KERN_INFO "PCI-DMA: Re-initialize machine vector.\n"); + machvec_init("dig"); + swiotlb_init(); + dma_ops = &swiotlb_dma_ops; +#else + panic("Unable to find Intel IOMMU"); +#endif + } +} -- cgit