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/pci.h> |
12 | |
13 | #include "amd_iommu.h" |
14 | |
15 | static struct dentry *amd_iommu_debugfs; |
16 | static DEFINE_MUTEX(amd_iommu_debugfs_lock); |
17 | |
18 | #define MAX_NAME_LEN 20 |
19 | |
20 | void amd_iommu_debugfs_setup(struct amd_iommu *iommu) |
21 | { |
22 | char name[MAX_NAME_LEN + 1]; |
23 | |
24 | mutex_lock(&amd_iommu_debugfs_lock); |
25 | if (!amd_iommu_debugfs) |
26 | amd_iommu_debugfs = debugfs_create_dir(name: "amd", |
27 | parent: iommu_debugfs_dir); |
28 | mutex_unlock(lock: &amd_iommu_debugfs_lock); |
29 | |
30 | snprintf(buf: name, MAX_NAME_LEN, fmt: "iommu%02d", iommu->index); |
31 | iommu->debugfs = debugfs_create_dir(name, parent: amd_iommu_debugfs); |
32 | } |
33 |