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
16static struct dentry *amd_iommu_debugfs;
17static DEFINE_MUTEX(amd_iommu_debugfs_lock);
18
19#define	MAX_NAME_LEN	20
20
21void 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}