1 /* Glue code to lib/swiotlb.c */
2
3 #include <linux/pci.h>
4 #include <linux/gfp.h>
5 #include <linux/cache.h>
6 #include <linux/module.h>
7 #include <linux/dma-mapping.h>
8
9 #include <asm/swiotlb.h>
10 #include <asm/dma.h>
11 #include <asm/iommu.h>
12 #include <asm/machvec.h>
13
14 int swiotlb __read_mostly;
15 EXPORT_SYMBOL(swiotlb);
16
ia64_swiotlb_alloc_coherent(struct device * dev,size_t size,dma_addr_t * dma_handle,gfp_t gfp)17 static void *ia64_swiotlb_alloc_coherent(struct device *dev, size_t size,
18 dma_addr_t *dma_handle, gfp_t gfp)
19 {
20 if (dev->coherent_dma_mask != DMA_BIT_MASK(64))
21 gfp |= GFP_DMA;
22 return swiotlb_alloc_coherent(dev, size, dma_handle, gfp);
23 }
24
25 struct dma_map_ops swiotlb_dma_ops = {
26 .alloc_coherent = ia64_swiotlb_alloc_coherent,
27 .free_coherent = swiotlb_free_coherent,
28 .map_page = swiotlb_map_page,
29 .unmap_page = swiotlb_unmap_page,
30 .map_sg = swiotlb_map_sg_attrs,
31 .unmap_sg = swiotlb_unmap_sg_attrs,
32 .sync_single_for_cpu = swiotlb_sync_single_for_cpu,
33 .sync_single_for_device = swiotlb_sync_single_for_device,
34 .sync_sg_for_cpu = swiotlb_sync_sg_for_cpu,
35 .sync_sg_for_device = swiotlb_sync_sg_for_device,
36 .dma_supported = swiotlb_dma_supported,
37 .mapping_error = swiotlb_dma_mapping_error,
38 };
39
swiotlb_dma_init(void)40 void __init swiotlb_dma_init(void)
41 {
42 dma_ops = &swiotlb_dma_ops;
43 swiotlb_init(1);
44 }
45
pci_swiotlb_init(void)46 void __init pci_swiotlb_init(void)
47 {
48 if (!iommu_detected) {
49 #ifdef CONFIG_IA64_GENERIC
50 swiotlb = 1;
51 printk(KERN_INFO "PCI-DMA: Re-initialize machine vector.\n");
52 machvec_init("dig");
53 swiotlb_init(1);
54 dma_ops = &swiotlb_dma_ops;
55 #else
56 panic("Unable to find Intel IOMMU");
57 #endif
58 }
59 }
60