blob: 5a5bf5a82ac25cb1d16edb4fc92d9e5bae74d122 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
|
// SPDX-License-Identifier: GPL-2.0
/*
* Dynamic DMA mapping support.
*/
#include <linux/types.h>
#include <linux/mm.h>
#include <linux/string.h>
#include <linux/pci.h>
#include <linux/module.h>
#include <linux/dmar.h>
#include <asm/iommu.h>
#include <asm/machvec.h>
#include <linux/dma-mapping.h>
#include <linux/kernel.h>
#include <asm/page.h>
int no_iommu __read_mostly;
#ifdef CONFIG_IOMMU_DEBUG
int force_iommu __read_mostly = 1;
#else
int force_iommu __read_mostly;
#endif
int iommu_pass_through;
extern struct dma_map_ops intel_dma_ops;
static int __init pci_iommu_init(void)
{
if (iommu_detected)
intel_iommu_init();
return 0;
}
/* Must execute after PCI subsystem */
fs_initcall(pci_iommu_init);
void __init pci_iommu_alloc(void)
{
dma_ops = &intel_dma_ops;
/*
* The order of these functions is important for
* fall-back/fail-over reasons
*/
detect_intel_iommu();
#ifdef CONFIG_SWIOTLB
if (!iommu_detected) {
#ifdef CONFIG_IA64_GENERIC
printk(KERN_INFO "PCI-DMA: Re-initialize machine vector.\n");
machvec_init("dig");
swiotlb_dma_init();
#else
panic("Unable to find Intel IOMMU");
#endif /* CONFIG_IA64_GENERIC */
}
#endif /* CONFIG_SWIOTLB */
}
|
