forked from luck/tmp_suning_uos_patched
7d0f5fd3e4
Implement a skeleton framework for debugfs support in the AMD IOMMU. Add an AMD-specific Kconfig boolean that depends upon general enablement of DebugFS in the IOMMU. Signed-off-by: Gary R Hook <gary.hook@amd.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
34 lines
805 B
C
34 lines
805 B
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);
|
|
}
|