From b041cf22ddb742874040d0a3259d0be46f3d3a4b Mon Sep 17 00:00:00 2001 From: Ian Campbell Date: Fri, 23 Jan 2009 10:56:16 +0000 Subject: x86: rename arch/x86/kernel/pci-swiotlb_64.c => pci-swiotlb.c The file is used for 32 and 64 bit since: commit cfb80c9eae8c7ed8f2ee81090062d15ead51cbe8 Author: Jeremy Fitzhardinge Date: Tue Dec 16 12:17:36 2008 -0800 x86: unify pci iommu setup and allow swiotlb to compile for 32 bit Signed-off-by: Ian Campbell Signed-off-by: Ingo Molnar --- arch/x86/kernel/pci-swiotlb.c | 84 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 84 insertions(+) create mode 100644 arch/x86/kernel/pci-swiotlb.c (limited to 'arch/x86/kernel/pci-swiotlb.c') diff --git a/arch/x86/kernel/pci-swiotlb.c b/arch/x86/kernel/pci-swiotlb.c new file mode 100644 index 00000000000..34f12e9996e --- /dev/null +++ b/arch/x86/kernel/pci-swiotlb.c @@ -0,0 +1,84 @@ +/* Glue code to lib/swiotlb.c */ + +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +int swiotlb __read_mostly; + +void * __init swiotlb_alloc_boot(size_t size, unsigned long nslabs) +{ + return alloc_bootmem_low_pages(size); +} + +void *swiotlb_alloc(unsigned order, unsigned long nslabs) +{ + return (void *)__get_free_pages(GFP_DMA | __GFP_NOWARN, order); +} + +dma_addr_t swiotlb_phys_to_bus(struct device *hwdev, phys_addr_t paddr) +{ + return paddr; +} + +phys_addr_t swiotlb_bus_to_phys(dma_addr_t baddr) +{ + return baddr; +} + +int __weak swiotlb_arch_range_needs_mapping(phys_addr_t paddr, size_t size) +{ + return 0; +} + +static void *x86_swiotlb_alloc_coherent(struct device *hwdev, size_t size, + dma_addr_t *dma_handle, gfp_t flags) +{ + void *vaddr; + + vaddr = dma_generic_alloc_coherent(hwdev, size, dma_handle, flags); + if (vaddr) + return vaddr; + + return swiotlb_alloc_coherent(hwdev, size, dma_handle, flags); +} + +struct dma_map_ops swiotlb_dma_ops = { + .mapping_error = swiotlb_dma_mapping_error, + .alloc_coherent = x86_swiotlb_alloc_coherent, + .free_coherent = swiotlb_free_coherent, + .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_attrs, + .unmap_sg = swiotlb_unmap_sg_attrs, + .map_page = swiotlb_map_page, + .unmap_page = swiotlb_unmap_page, + .dma_supported = NULL, +}; + +void __init pci_swiotlb_init(void) +{ + /* don't initialize swiotlb if iommu=off (no_iommu=1) */ +#ifdef CONFIG_X86_64 + if (!iommu_detected && !no_iommu && max_pfn > MAX_DMA32_PFN) + swiotlb = 1; +#endif + if (swiotlb_force) + swiotlb = 1; + if (swiotlb) { + printk(KERN_INFO "PCI-DMA: Using software bounce buffering for IO (SWIOTLB)\n"); + swiotlb_init(); + dma_ops = &swiotlb_dma_ops; + } +} -- cgit v1.2.3-70-g09d2