linux/drivers/pci/pcie/err.c

// SPDX-License-Identifier: GPL-2.0
/*
 * This file implements the error recovery as a core part of PCIe error
 * reporting. When a PCIe error is delivered, an error message will be
 * collected and printed to console, then, an error recovery procedure
 * will be executed by following the PCI error recovery rules.
 *
 * Copyright (C) 2006 Intel Corp.
 *	Tom Long Nguyen ([email protected])
 *	Zhang Yanmin ([email protected])
 */

#define dev_fmt(fmt) …

#include <linux/pci.h>
#include <linux/pm_runtime.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/aer.h>
#include "portdrv.h"
#include "../pci.h"

static pci_ers_result_t merge_result(enum pci_ers_result orig,
				  enum pci_ers_result new)
{ … }

static int report_error_detected(struct pci_dev *dev,
				 pci_channel_state_t state,
				 enum pci_ers_result *result)
{ … }

static int pci_pm_runtime_get_sync(struct pci_dev *pdev, void *data)
{ … }

static int pci_pm_runtime_put(struct pci_dev *pdev, void *data)
{ … }

static int report_frozen_detected(struct pci_dev *dev, void *data)
{ … }

static int report_normal_detected(struct pci_dev *dev, void *data)
{ … }

static int report_mmio_enabled(struct pci_dev *dev, void *data)
{ … }

static int report_slot_reset(struct pci_dev *dev, void *data)
{ … }

static int report_resume(struct pci_dev *dev, void *data)
{ … }

/**
 * pci_walk_bridge - walk bridges potentially AER affected
 * @bridge:	bridge which may be a Port, an RCEC, or an RCiEP
 * @cb:		callback to be called for each device found
 * @userdata:	arbitrary pointer to be passed to callback
 *
 * If the device provided is a bridge, walk the subordinate bus, including
 * any bridged devices on buses under this bus.  Call the provided callback
 * on each device found.
 *
 * If the device provided has no subordinate bus, e.g., an RCEC or RCiEP,
 * call the callback on the device itself.
 */
static void pci_walk_bridge(struct pci_dev *bridge,
			    int (*cb)(struct pci_dev *, void *),
			    void *userdata)
{ … }

pci_ers_result_t pcie_do_recovery(struct pci_dev *dev,
		pci_channel_state_t state,
		pci_ers_result_t (*reset_subordinates)(struct pci_dev *pdev))
{ … }