swiotlb: Defer swiotlb init printing, export swiotlb_print_info()
[linux-2.6.git] / arch / ia64 / kernel / pci-swiotlb.c
1 /* Glue code to lib/swiotlb.c */
2
3 #include <linux/pci.h>
4 #include <linux/cache.h>
5 #include <linux/module.h>
6 #include <linux/dma-mapping.h>
7
8 #include <asm/swiotlb.h>
9 #include <asm/dma.h>
10 #include <asm/iommu.h>
11 #include <asm/machvec.h>
12
13 int swiotlb __read_mostly;
14 EXPORT_SYMBOL(swiotlb);
15
16 static void *ia64_swiotlb_alloc_coherent(struct device *dev, size_t size,
17                                          dma_addr_t *dma_handle, gfp_t gfp)
18 {
19         if (dev->coherent_dma_mask != DMA_BIT_MASK(64))
20                 gfp |= GFP_DMA;
21         return swiotlb_alloc_coherent(dev, size, dma_handle, gfp);
22 }
23
24 struct dma_map_ops swiotlb_dma_ops = {
25         .alloc_coherent = ia64_swiotlb_alloc_coherent,
26         .free_coherent = swiotlb_free_coherent,
27         .map_page = swiotlb_map_page,
28         .unmap_page = swiotlb_unmap_page,
29         .map_sg = swiotlb_map_sg_attrs,
30         .unmap_sg = swiotlb_unmap_sg_attrs,
31         .sync_single_for_cpu = swiotlb_sync_single_for_cpu,
32         .sync_single_for_device = swiotlb_sync_single_for_device,
33         .sync_single_range_for_cpu = swiotlb_sync_single_range_for_cpu,
34         .sync_single_range_for_device = swiotlb_sync_single_range_for_device,
35         .sync_sg_for_cpu = swiotlb_sync_sg_for_cpu,
36         .sync_sg_for_device = swiotlb_sync_sg_for_device,
37         .dma_supported = swiotlb_dma_supported,
38         .mapping_error = swiotlb_dma_mapping_error,
39 };
40
41 void __init swiotlb_dma_init(void)
42 {
43         dma_ops = &swiotlb_dma_ops;
44         swiotlb_init(1);
45 }
46
47 void __init pci_swiotlb_init(void)
48 {
49         if (!iommu_detected) {
50 #ifdef CONFIG_IA64_GENERIC
51                 swiotlb = 1;
52                 printk(KERN_INFO "PCI-DMA: Re-initialize machine vector.\n");
53                 machvec_init("dig");
54                 swiotlb_init(1);
55                 dma_ops = &swiotlb_dma_ops;
56 #else
57                 panic("Unable to find Intel IOMMU");
58 #endif
59         }
60 }