[mirror_ubuntu-hirsute-kernel.git] / drivers / iommu / amd_iommu_debugfs.c

// 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);
}
Commit	Line	Data
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	}