linux/drivers/iommu/amd/ppr.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2023 Advanced Micro Devices, Inc.
 */

#define pr_fmt(fmt) …
#define dev_fmt(fmt) …

#include <linux/amd-iommu.h>
#include <linux/delay.h>
#include <linux/mmu_notifier.h>

#include <asm/iommu.h>

#include "amd_iommu.h"
#include "amd_iommu_types.h"

#include "../iommu-pages.h"

int __init amd_iommu_alloc_ppr_log(struct amd_iommu *iommu)
{ … }

void amd_iommu_enable_ppr_log(struct amd_iommu *iommu)
{ … }

void __init amd_iommu_free_ppr_log(struct amd_iommu *iommu)
{ … }

/*
 * This function restarts ppr logging in case the IOMMU experienced
 * PPR log overflow.
 */
void amd_iommu_restart_ppr_log(struct amd_iommu *iommu)
{ … }

static inline u32 ppr_flag_to_fault_perm(u16 flag)
{ … }

static bool ppr_is_valid(struct amd_iommu *iommu, u64 *raw)
{ … }

static void iommu_call_iopf_notifier(struct amd_iommu *iommu, u64 *raw)
{ … }

void amd_iommu_poll_ppr_log(struct amd_iommu *iommu)
{ … }

/**************************************************************
 *
 * IOPF handling stuff
 */

/* Setup per-IOMMU IOPF queue if not exist. */
int amd_iommu_iopf_init(struct amd_iommu *iommu)
{ … }

/* Destroy per-IOMMU IOPF queue if no longer needed. */
void amd_iommu_iopf_uninit(struct amd_iommu *iommu)
{ … }

void amd_iommu_page_response(struct device *dev, struct iopf_fault *evt,
			     struct iommu_page_response *resp)
{ … }

int amd_iommu_iopf_add_device(struct amd_iommu *iommu,
			      struct iommu_dev_data *dev_data)
{ … }

/* Its assumed that caller has verified that device was added to iopf queue */
void amd_iommu_iopf_remove_device(struct amd_iommu *iommu,
				  struct iommu_dev_data *dev_data)
{ … }