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7d0f5fd3 GH |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* | |
3 | * AMD IOMMU driver | |
4 | * | |
5 | * Copyright (C) 2018 Advanced Micro Devices, Inc. | |
6 | * | |
7 | * Author: Gary R Hook <gary.hook@amd.com> | |
8 | */ | |
9 | ||
10 | #include <linux/debugfs.h> | |
11 | #include <linux/iommu.h> | |
12 | #include <linux/pci.h> | |
13 | #include "amd_iommu_proto.h" | |
14 | #include "amd_iommu_types.h" | |
15 | ||
16 | static struct dentry *amd_iommu_debugfs; | |
17 | static DEFINE_MUTEX(amd_iommu_debugfs_lock); | |
18 | ||
19 | #define MAX_NAME_LEN 20 | |
20 | ||
21 | void amd_iommu_debugfs_setup(struct amd_iommu *iommu) | |
22 | { | |
23 | char name[MAX_NAME_LEN + 1]; | |
24 | ||
25 | mutex_lock(&amd_iommu_debugfs_lock); | |
26 | if (!amd_iommu_debugfs) | |
27 | amd_iommu_debugfs = debugfs_create_dir("amd", | |
28 | iommu_debugfs_dir); | |
29 | mutex_unlock(&amd_iommu_debugfs_lock); | |
30 | ||
31 | snprintf(name, MAX_NAME_LEN, "iommu%02d", iommu->index); | |
32 | iommu->debugfs = debugfs_create_dir(name, amd_iommu_debugfs); | |
33 | } |