| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * AMD IOMMU driver |
| * |
| * Copyright (C) 2018 Advanced Micro Devices, Inc. |
| * |
| * Author: Gary R Hook <gary.hook@amd.com> |
| */ |
| |
| #include <linux/debugfs.h> |
| #include <linux/iommu.h> |
| #include <linux/pci.h> |
| #include "amd_iommu_proto.h" |
| #include "amd_iommu_types.h" |
| |
| static struct dentry *amd_iommu_debugfs; |
| static DEFINE_MUTEX(amd_iommu_debugfs_lock); |
| |
| #define MAX_NAME_LEN 20 |
| |
| void amd_iommu_debugfs_setup(struct amd_iommu *iommu) |
| { |
| char name[MAX_NAME_LEN + 1]; |
| |
| mutex_lock(&amd_iommu_debugfs_lock); |
| if (!amd_iommu_debugfs) |
| amd_iommu_debugfs = debugfs_create_dir("amd", |
| iommu_debugfs_dir); |
| mutex_unlock(&amd_iommu_debugfs_lock); |
| |
| snprintf(name, MAX_NAME_LEN, "iommu%02d", iommu->index); |
| iommu->debugfs = debugfs_create_dir(name, amd_iommu_debugfs); |
| } |