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
15static struct dentry *amd_iommu_debugfs;
16static DEFINE_MUTEX(amd_iommu_debugfs_lock);
17
18#define	MAX_NAME_LEN	20
19
20void 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("amd",
27						       iommu_debugfs_dir);
28	mutex_unlock(&amd_iommu_debugfs_lock);
29
30	snprintf(name, MAX_NAME_LEN, "iommu%02d", iommu->index);
31	iommu->debugfs = debugfs_create_dir(name, amd_iommu_debugfs);
32}