// 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/pci.h> #include "amd_iommu.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); }