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 <jeremy@goop.org>
  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 <ian.campbell@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 0 insertions, 84 deletions

diff --git a/arch/x86/kernel/pci-swiotlb_64.c b/arch/x86/kernel/pci-swiotlb_64.c
deleted file mode 100644
index 34f12e9..0000000
--- a/arch/x86/kernel/pci-swiotlb_64.c
+++ /dev/null
@@ -1,84 +0,0 @@
-/* Glue code to lib/swiotlb.c */
-
-#include <linux/pci.h>
-#include <linux/cache.h>
-#include <linux/module.h>
-#include <linux/swiotlb.h>
-#include <linux/bootmem.h>
-#include <linux/dma-mapping.h>
-
-#include <asm/iommu.h>
-#include <asm/swiotlb.h>
-#include <asm/dma.h>
-
-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;
-	}
-}