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