2006-07-31 07:21:33 +00:00
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/*
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* drivers/pci/pcie/aer/aerdrv_core.c
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* This file implements the core part of PCI-Express AER. When an pci-express
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* error is delivered, an error message will be collected and printed to
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* console, then, an error recovery procedure will be executed by following
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* the pci error recovery rules.
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*
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* Copyright (C) 2006 Intel Corp.
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* Tom Long Nguyen (tom.l.nguyen@intel.com)
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* Zhang Yanmin (yanmin.zhang@intel.com)
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*
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*/
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/pm.h>
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#include <linux/suspend.h>
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#include <linux/acpi.h>
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#include <linux/pci-acpi.h>
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#include <linux/delay.h>
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#include "aerdrv.h"
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static int forceload;
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module_param(forceload, bool, 0);
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#define PCI_CFG_SPACE_SIZE (0x100)
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int pci_find_aer_capability(struct pci_dev *dev)
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{
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int pos;
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u32 reg32 = 0;
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/* Check if it's a pci-express device */
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pos = pci_find_capability(dev, PCI_CAP_ID_EXP);
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if (!pos)
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return 0;
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/* Check if it supports pci-express AER */
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pos = PCI_CFG_SPACE_SIZE;
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while (pos) {
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if (pci_read_config_dword(dev, pos, ®32))
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return 0;
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/* some broken boards return ~0 */
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if (reg32 == 0xffffffff)
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return 0;
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if (PCI_EXT_CAP_ID(reg32) == PCI_EXT_CAP_ID_ERR)
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break;
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pos = reg32 >> 20;
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}
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return pos;
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}
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int pci_enable_pcie_error_reporting(struct pci_dev *dev)
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{
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u16 reg16 = 0;
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int pos;
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pos = pci_find_capability(dev, PCI_CAP_ID_EXP);
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if (!pos)
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return -EIO;
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pci_read_config_word(dev, pos+PCI_EXP_DEVCTL, ®16);
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reg16 = reg16 |
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PCI_EXP_DEVCTL_CERE |
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PCI_EXP_DEVCTL_NFERE |
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PCI_EXP_DEVCTL_FERE |
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PCI_EXP_DEVCTL_URRE;
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pci_write_config_word(dev, pos+PCI_EXP_DEVCTL,
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reg16);
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return 0;
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}
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int pci_disable_pcie_error_reporting(struct pci_dev *dev)
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{
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u16 reg16 = 0;
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int pos;
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pos = pci_find_capability(dev, PCI_CAP_ID_EXP);
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if (!pos)
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return -EIO;
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pci_read_config_word(dev, pos+PCI_EXP_DEVCTL, ®16);
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reg16 = reg16 & ~(PCI_EXP_DEVCTL_CERE |
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PCI_EXP_DEVCTL_NFERE |
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PCI_EXP_DEVCTL_FERE |
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PCI_EXP_DEVCTL_URRE);
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pci_write_config_word(dev, pos+PCI_EXP_DEVCTL,
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reg16);
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return 0;
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}
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int pci_cleanup_aer_uncorrect_error_status(struct pci_dev *dev)
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{
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int pos;
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u32 status, mask;
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pos = pci_find_aer_capability(dev);
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if (!pos)
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return -EIO;
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pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS, &status);
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pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_SEVER, &mask);
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if (dev->error_state == pci_channel_io_normal)
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status &= ~mask; /* Clear corresponding nonfatal bits */
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else
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status &= mask; /* Clear corresponding fatal bits */
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pci_write_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS, status);
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return 0;
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}
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static int find_device_iter(struct device *device, void *data)
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{
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struct pci_dev *dev;
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u16 id = *(unsigned long *)data;
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u8 secondary, subordinate, d_bus = id >> 8;
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if (device->bus == &pci_bus_type) {
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dev = to_pci_dev(device);
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if (id == ((dev->bus->number << 8) | dev->devfn)) {
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/*
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* Device ID match
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*/
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*(unsigned long*)data = (unsigned long)device;
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return 1;
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}
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/*
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* If device is P2P, check if it is an upstream?
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*/
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if (dev->hdr_type & PCI_HEADER_TYPE_BRIDGE) {
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pci_read_config_byte(dev, PCI_SECONDARY_BUS,
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&secondary);
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pci_read_config_byte(dev, PCI_SUBORDINATE_BUS,
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&subordinate);
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if (d_bus >= secondary && d_bus <= subordinate) {
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*(unsigned long*)data = (unsigned long)device;
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return 1;
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}
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}
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}
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return 0;
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}
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/**
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* find_source_device - search through device hierarchy for source device
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* @p_dev: pointer to Root Port pci_dev data structure
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* @id: device ID of agent who sends an error message to this Root Port
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*
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* Invoked when error is detected at the Root Port.
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**/
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static struct device* find_source_device(struct pci_dev *parent, u16 id)
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{
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struct pci_dev *dev = parent;
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struct device *device;
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unsigned long device_addr;
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int status;
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/* Is Root Port an agent that sends error message? */
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if (id == ((dev->bus->number << 8) | dev->devfn))
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return &dev->dev;
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do {
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device_addr = id;
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if ((status = device_for_each_child(&dev->dev,
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&device_addr, find_device_iter))) {
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device = (struct device*)device_addr;
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dev = to_pci_dev(device);
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if (id == ((dev->bus->number << 8) | dev->devfn))
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return device;
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}
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}while (status);
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return NULL;
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}
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static void report_error_detected(struct pci_dev *dev, void *data)
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{
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pci_ers_result_t vote;
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struct pci_error_handlers *err_handler;
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struct aer_broadcast_data *result_data;
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result_data = (struct aer_broadcast_data *) data;
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dev->error_state = result_data->state;
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if (!dev->driver ||
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!dev->driver->err_handler ||
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!dev->driver->err_handler->error_detected) {
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if (result_data->state == pci_channel_io_frozen &&
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!(dev->hdr_type & PCI_HEADER_TYPE_BRIDGE)) {
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/*
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* In case of fatal recovery, if one of down-
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* stream device has no driver. We might be
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* unable to recover because a later insmod
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* of a driver for this device is unaware of
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* its hw state.
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*/
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printk(KERN_DEBUG "Device ID[%s] has %s\n",
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dev->dev.bus_id, (dev->driver) ?
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"no AER-aware driver" : "no driver");
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}
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return;
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}
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err_handler = dev->driver->err_handler;
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vote = err_handler->error_detected(dev, result_data->state);
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result_data->result = merge_result(result_data->result, vote);
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return;
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}
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static void report_mmio_enabled(struct pci_dev *dev, void *data)
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{
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pci_ers_result_t vote;
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struct pci_error_handlers *err_handler;
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struct aer_broadcast_data *result_data;
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result_data = (struct aer_broadcast_data *) data;
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if (!dev->driver ||
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!dev->driver->err_handler ||
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!dev->driver->err_handler->mmio_enabled)
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return;
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err_handler = dev->driver->err_handler;
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vote = err_handler->mmio_enabled(dev);
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result_data->result = merge_result(result_data->result, vote);
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return;
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}
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static void report_slot_reset(struct pci_dev *dev, void *data)
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{
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pci_ers_result_t vote;
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struct pci_error_handlers *err_handler;
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struct aer_broadcast_data *result_data;
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result_data = (struct aer_broadcast_data *) data;
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if (!dev->driver ||
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!dev->driver->err_handler ||
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!dev->driver->err_handler->slot_reset)
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return;
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err_handler = dev->driver->err_handler;
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vote = err_handler->slot_reset(dev);
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result_data->result = merge_result(result_data->result, vote);
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return;
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}
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static void report_resume(struct pci_dev *dev, void *data)
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{
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struct pci_error_handlers *err_handler;
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dev->error_state = pci_channel_io_normal;
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if (!dev->driver ||
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!dev->driver->err_handler ||
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!dev->driver->err_handler->slot_reset)
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return;
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err_handler = dev->driver->err_handler;
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err_handler->resume(dev);
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return;
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}
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/**
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* broadcast_error_message - handle message broadcast to downstream drivers
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* @device: pointer to from where in a hierarchy message is broadcasted down
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* @api: callback to be broadcasted
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* @state: error state
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*
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* Invoked during error recovery process. Once being invoked, the content
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* of error severity will be broadcasted to all downstream drivers in a
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* hierarchy in question.
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**/
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static pci_ers_result_t broadcast_error_message(struct pci_dev *dev,
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enum pci_channel_state state,
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char *error_mesg,
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void (*cb)(struct pci_dev *, void *))
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{
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struct aer_broadcast_data result_data;
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printk(KERN_DEBUG "Broadcast %s message\n", error_mesg);
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result_data.state = state;
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if (cb == report_error_detected)
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result_data.result = PCI_ERS_RESULT_CAN_RECOVER;
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else
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result_data.result = PCI_ERS_RESULT_RECOVERED;
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if (dev->hdr_type & PCI_HEADER_TYPE_BRIDGE) {
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/*
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* If the error is reported by a bridge, we think this error
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* is related to the downstream link of the bridge, so we
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* do error recovery on all subordinates of the bridge instead
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* of the bridge and clear the error status of the bridge.
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*/
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if (cb == report_error_detected)
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dev->error_state = state;
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pci_walk_bus(dev->subordinate, cb, &result_data);
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if (cb == report_resume) {
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pci_cleanup_aer_uncorrect_error_status(dev);
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dev->error_state = pci_channel_io_normal;
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}
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}
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else {
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/*
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* If the error is reported by an end point, we think this
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* error is related to the upstream link of the end point.
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*/
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pci_walk_bus(dev->bus, cb, &result_data);
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}
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return result_data.result;
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}
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struct find_aer_service_data {
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struct pcie_port_service_driver *aer_driver;
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int is_downstream;
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};
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static int find_aer_service_iter(struct device *device, void *data)
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{
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struct device_driver *driver;
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struct pcie_port_service_driver *service_driver;
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struct pcie_device *pcie_dev;
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struct find_aer_service_data *result;
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result = (struct find_aer_service_data *) data;
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if (device->bus == &pcie_port_bus_type) {
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pcie_dev = to_pcie_device(device);
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if (pcie_dev->id.port_type == PCIE_SW_DOWNSTREAM_PORT)
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result->is_downstream = 1;
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driver = device->driver;
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if (driver) {
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service_driver = to_service_driver(driver);
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if (service_driver->id_table->service_type ==
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PCIE_PORT_SERVICE_AER) {
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result->aer_driver = service_driver;
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return 1;
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}
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}
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}
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return 0;
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}
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static void find_aer_service(struct pci_dev *dev,
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struct find_aer_service_data *data)
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{
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2006-08-28 18:43:25 +00:00
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int retval;
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retval = device_for_each_child(&dev->dev, data, find_aer_service_iter);
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2006-07-31 07:21:33 +00:00
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}
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static pci_ers_result_t reset_link(struct pcie_device *aerdev,
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struct pci_dev *dev)
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{
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struct pci_dev *udev;
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pci_ers_result_t status;
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struct find_aer_service_data data;
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if (dev->hdr_type & PCI_HEADER_TYPE_BRIDGE)
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udev = dev;
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else
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udev= dev->bus->self;
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data.is_downstream = 0;
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data.aer_driver = NULL;
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|
|
find_aer_service(udev, &data);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Use the aer driver of the error agent firstly.
|
|
|
|
* If it hasn't the aer driver, use the root port's
|
|
|
|
*/
|
|
|
|
if (!data.aer_driver || !data.aer_driver->reset_link) {
|
|
|
|
if (data.is_downstream &&
|
|
|
|
aerdev->device.driver &&
|
|
|
|
to_service_driver(aerdev->device.driver)->reset_link) {
|
|
|
|
data.aer_driver =
|
|
|
|
to_service_driver(aerdev->device.driver);
|
|
|
|
} else {
|
|
|
|
printk(KERN_DEBUG "No link-reset support to Device ID"
|
|
|
|
"[%s]\n",
|
|
|
|
dev->dev.bus_id);
|
|
|
|
return PCI_ERS_RESULT_DISCONNECT;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
status = data.aer_driver->reset_link(udev);
|
|
|
|
if (status != PCI_ERS_RESULT_RECOVERED) {
|
|
|
|
printk(KERN_DEBUG "Link reset at upstream Device ID"
|
|
|
|
"[%s] failed\n",
|
|
|
|
udev->dev.bus_id);
|
|
|
|
return PCI_ERS_RESULT_DISCONNECT;
|
|
|
|
}
|
|
|
|
|
|
|
|
return status;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* do_recovery - handle nonfatal/fatal error recovery process
|
|
|
|
* @aerdev: pointer to a pcie_device data structure of root port
|
|
|
|
* @dev: pointer to a pci_dev data structure of agent detecting an error
|
|
|
|
* @severity: error severity type
|
|
|
|
*
|
|
|
|
* Invoked when an error is nonfatal/fatal. Once being invoked, broadcast
|
|
|
|
* error detected message to all downstream drivers within a hierarchy in
|
|
|
|
* question and return the returned code.
|
|
|
|
**/
|
|
|
|
static pci_ers_result_t do_recovery(struct pcie_device *aerdev,
|
|
|
|
struct pci_dev *dev,
|
|
|
|
int severity)
|
|
|
|
{
|
|
|
|
pci_ers_result_t status, result = PCI_ERS_RESULT_RECOVERED;
|
|
|
|
enum pci_channel_state state;
|
|
|
|
|
|
|
|
if (severity == AER_FATAL)
|
|
|
|
state = pci_channel_io_frozen;
|
|
|
|
else
|
|
|
|
state = pci_channel_io_normal;
|
|
|
|
|
|
|
|
status = broadcast_error_message(dev,
|
|
|
|
state,
|
|
|
|
"error_detected",
|
|
|
|
report_error_detected);
|
|
|
|
|
|
|
|
if (severity == AER_FATAL) {
|
|
|
|
result = reset_link(aerdev, dev);
|
|
|
|
if (result != PCI_ERS_RESULT_RECOVERED) {
|
|
|
|
/* TODO: Should panic here? */
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (status == PCI_ERS_RESULT_CAN_RECOVER)
|
|
|
|
status = broadcast_error_message(dev,
|
|
|
|
state,
|
|
|
|
"mmio_enabled",
|
|
|
|
report_mmio_enabled);
|
|
|
|
|
|
|
|
if (status == PCI_ERS_RESULT_NEED_RESET) {
|
|
|
|
/*
|
|
|
|
* TODO: Should call platform-specific
|
|
|
|
* functions to reset slot before calling
|
|
|
|
* drivers' slot_reset callbacks?
|
|
|
|
*/
|
|
|
|
status = broadcast_error_message(dev,
|
|
|
|
state,
|
|
|
|
"slot_reset",
|
|
|
|
report_slot_reset);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (status == PCI_ERS_RESULT_RECOVERED)
|
|
|
|
broadcast_error_message(dev,
|
|
|
|
state,
|
|
|
|
"resume",
|
|
|
|
report_resume);
|
|
|
|
|
|
|
|
return status;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* handle_error_source - handle logging error into an event log
|
|
|
|
* @aerdev: pointer to pcie_device data structure of the root port
|
|
|
|
* @dev: pointer to pci_dev data structure of error source device
|
|
|
|
* @info: comprehensive error information
|
|
|
|
*
|
|
|
|
* Invoked when an error being detected by Root Port.
|
|
|
|
**/
|
|
|
|
static void handle_error_source(struct pcie_device * aerdev,
|
|
|
|
struct pci_dev *dev,
|
|
|
|
struct aer_err_info info)
|
|
|
|
{
|
|
|
|
pci_ers_result_t status = 0;
|
|
|
|
int pos;
|
|
|
|
|
|
|
|
if (info.severity == AER_CORRECTABLE) {
|
|
|
|
/*
|
|
|
|
* Correctable error does not need software intevention.
|
|
|
|
* No need to go through error recovery process.
|
|
|
|
*/
|
|
|
|
pos = pci_find_aer_capability(dev);
|
|
|
|
if (pos)
|
|
|
|
pci_write_config_dword(dev, pos + PCI_ERR_COR_STATUS,
|
|
|
|
info.status);
|
|
|
|
} else {
|
|
|
|
status = do_recovery(aerdev, dev, info.severity);
|
|
|
|
if (status == PCI_ERS_RESULT_RECOVERED) {
|
|
|
|
printk(KERN_DEBUG "AER driver successfully recovered\n");
|
|
|
|
} else {
|
|
|
|
/* TODO: Should kernel panic here? */
|
|
|
|
printk(KERN_DEBUG "AER driver didn't recover\n");
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* aer_enable_rootport - enable Root Port's interrupts when receiving messages
|
|
|
|
* @rpc: pointer to a Root Port data structure
|
|
|
|
*
|
|
|
|
* Invoked when PCIE bus loads AER service driver.
|
|
|
|
**/
|
|
|
|
void aer_enable_rootport(struct aer_rpc *rpc)
|
|
|
|
{
|
|
|
|
struct pci_dev *pdev = rpc->rpd->port;
|
|
|
|
int pos, aer_pos;
|
|
|
|
u16 reg16;
|
|
|
|
u32 reg32;
|
|
|
|
|
|
|
|
pos = pci_find_capability(pdev, PCI_CAP_ID_EXP);
|
|
|
|
/* Clear PCIE Capability's Device Status */
|
|
|
|
pci_read_config_word(pdev, pos+PCI_EXP_DEVSTA, ®16);
|
|
|
|
pci_write_config_word(pdev, pos+PCI_EXP_DEVSTA, reg16);
|
|
|
|
|
|
|
|
/* Disable system error generation in response to error messages */
|
|
|
|
pci_read_config_word(pdev, pos + PCI_EXP_RTCTL, ®16);
|
|
|
|
reg16 &= ~(SYSTEM_ERROR_INTR_ON_MESG_MASK);
|
|
|
|
pci_write_config_word(pdev, pos + PCI_EXP_RTCTL, reg16);
|
|
|
|
|
|
|
|
aer_pos = pci_find_aer_capability(pdev);
|
|
|
|
/* Clear error status */
|
|
|
|
pci_read_config_dword(pdev, aer_pos + PCI_ERR_ROOT_STATUS, ®32);
|
|
|
|
pci_write_config_dword(pdev, aer_pos + PCI_ERR_ROOT_STATUS, reg32);
|
|
|
|
pci_read_config_dword(pdev, aer_pos + PCI_ERR_COR_STATUS, ®32);
|
|
|
|
pci_write_config_dword(pdev, aer_pos + PCI_ERR_COR_STATUS, reg32);
|
|
|
|
pci_read_config_dword(pdev, aer_pos + PCI_ERR_UNCOR_STATUS, ®32);
|
|
|
|
pci_write_config_dword(pdev, aer_pos + PCI_ERR_UNCOR_STATUS, reg32);
|
|
|
|
|
|
|
|
/* Enable Root Port device reporting error itself */
|
|
|
|
pci_read_config_word(pdev, pos+PCI_EXP_DEVCTL, ®16);
|
|
|
|
reg16 = reg16 |
|
|
|
|
PCI_EXP_DEVCTL_CERE |
|
|
|
|
PCI_EXP_DEVCTL_NFERE |
|
|
|
|
PCI_EXP_DEVCTL_FERE |
|
|
|
|
PCI_EXP_DEVCTL_URRE;
|
|
|
|
pci_write_config_word(pdev, pos+PCI_EXP_DEVCTL,
|
|
|
|
reg16);
|
|
|
|
|
|
|
|
/* Enable Root Port's interrupt in response to error messages */
|
|
|
|
pci_write_config_dword(pdev,
|
|
|
|
aer_pos + PCI_ERR_ROOT_COMMAND,
|
|
|
|
ROOT_PORT_INTR_ON_MESG_MASK);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* disable_root_aer - disable Root Port's interrupts when receiving messages
|
|
|
|
* @rpc: pointer to a Root Port data structure
|
|
|
|
*
|
|
|
|
* Invoked when PCIE bus unloads AER service driver.
|
|
|
|
**/
|
|
|
|
static void disable_root_aer(struct aer_rpc *rpc)
|
|
|
|
{
|
|
|
|
struct pci_dev *pdev = rpc->rpd->port;
|
|
|
|
u32 reg32;
|
|
|
|
int pos;
|
|
|
|
|
|
|
|
pos = pci_find_aer_capability(pdev);
|
|
|
|
/* Disable Root's interrupt in response to error messages */
|
|
|
|
pci_write_config_dword(pdev, pos + PCI_ERR_ROOT_COMMAND, 0);
|
|
|
|
|
|
|
|
/* Clear Root's error status reg */
|
|
|
|
pci_read_config_dword(pdev, pos + PCI_ERR_ROOT_STATUS, ®32);
|
|
|
|
pci_write_config_dword(pdev, pos + PCI_ERR_ROOT_STATUS, reg32);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* get_e_source - retrieve an error source
|
|
|
|
* @rpc: pointer to the root port which holds an error
|
|
|
|
*
|
|
|
|
* Invoked by DPC handler to consume an error.
|
|
|
|
**/
|
|
|
|
static struct aer_err_source* get_e_source(struct aer_rpc *rpc)
|
|
|
|
{
|
|
|
|
struct aer_err_source *e_source;
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
/* Lock access to Root error producer/consumer index */
|
|
|
|
spin_lock_irqsave(&rpc->e_lock, flags);
|
|
|
|
if (rpc->prod_idx == rpc->cons_idx) {
|
|
|
|
spin_unlock_irqrestore(&rpc->e_lock, flags);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
e_source = &rpc->e_sources[rpc->cons_idx];
|
|
|
|
rpc->cons_idx++;
|
|
|
|
if (rpc->cons_idx == AER_ERROR_SOURCES_MAX)
|
|
|
|
rpc->cons_idx = 0;
|
|
|
|
spin_unlock_irqrestore(&rpc->e_lock, flags);
|
|
|
|
|
|
|
|
return e_source;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int get_device_error_info(struct pci_dev *dev, struct aer_err_info *info)
|
|
|
|
{
|
|
|
|
int pos;
|
|
|
|
|
|
|
|
pos = pci_find_aer_capability(dev);
|
|
|
|
|
|
|
|
/* The device might not support AER */
|
|
|
|
if (!pos)
|
|
|
|
return AER_SUCCESS;
|
|
|
|
|
|
|
|
if (info->severity == AER_CORRECTABLE) {
|
|
|
|
pci_read_config_dword(dev, pos + PCI_ERR_COR_STATUS,
|
|
|
|
&info->status);
|
|
|
|
if (!(info->status & ERR_CORRECTABLE_ERROR_MASK))
|
|
|
|
return AER_UNSUCCESS;
|
|
|
|
} else if (dev->hdr_type & PCI_HEADER_TYPE_BRIDGE ||
|
|
|
|
info->severity == AER_NONFATAL) {
|
|
|
|
|
|
|
|
/* Link is still healthy for IO reads */
|
|
|
|
pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS,
|
|
|
|
&info->status);
|
|
|
|
if (!(info->status & ERR_UNCORRECTABLE_ERROR_MASK))
|
|
|
|
return AER_UNSUCCESS;
|
|
|
|
|
|
|
|
if (info->status & AER_LOG_TLP_MASKS) {
|
|
|
|
info->flags |= AER_TLP_HEADER_VALID_FLAG;
|
|
|
|
pci_read_config_dword(dev,
|
|
|
|
pos + PCI_ERR_HEADER_LOG, &info->tlp.dw0);
|
|
|
|
pci_read_config_dword(dev,
|
|
|
|
pos + PCI_ERR_HEADER_LOG + 4, &info->tlp.dw1);
|
|
|
|
pci_read_config_dword(dev,
|
|
|
|
pos + PCI_ERR_HEADER_LOG + 8, &info->tlp.dw2);
|
|
|
|
pci_read_config_dword(dev,
|
|
|
|
pos + PCI_ERR_HEADER_LOG + 12, &info->tlp.dw3);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return AER_SUCCESS;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* aer_isr_one_error - consume an error detected by root port
|
|
|
|
* @p_device: pointer to error root port service device
|
|
|
|
* @e_src: pointer to an error source
|
|
|
|
**/
|
|
|
|
static void aer_isr_one_error(struct pcie_device *p_device,
|
|
|
|
struct aer_err_source *e_src)
|
|
|
|
{
|
|
|
|
struct device *s_device;
|
|
|
|
struct aer_err_info e_info = {0, 0, 0,};
|
|
|
|
int i;
|
|
|
|
u16 id;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* There is a possibility that both correctable error and
|
|
|
|
* uncorrectable error being logged. Report correctable error first.
|
|
|
|
*/
|
|
|
|
for (i = 1; i & ROOT_ERR_STATUS_MASKS ; i <<= 2) {
|
|
|
|
if (i > 4)
|
|
|
|
break;
|
|
|
|
if (!(e_src->status & i))
|
|
|
|
continue;
|
|
|
|
|
|
|
|
/* Init comprehensive error information */
|
|
|
|
if (i & PCI_ERR_ROOT_COR_RCV) {
|
|
|
|
id = ERR_COR_ID(e_src->id);
|
|
|
|
e_info.severity = AER_CORRECTABLE;
|
|
|
|
} else {
|
|
|
|
id = ERR_UNCOR_ID(e_src->id);
|
|
|
|
e_info.severity = ((e_src->status >> 6) & 1);
|
|
|
|
}
|
|
|
|
if (e_src->status &
|
|
|
|
(PCI_ERR_ROOT_MULTI_COR_RCV |
|
|
|
|
PCI_ERR_ROOT_MULTI_UNCOR_RCV))
|
|
|
|
e_info.flags |= AER_MULTI_ERROR_VALID_FLAG;
|
|
|
|
if (!(s_device = find_source_device(p_device->port, id))) {
|
|
|
|
printk(KERN_DEBUG "%s->can't find device of ID%04x\n",
|
|
|
|
__FUNCTION__, id);
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
if (get_device_error_info(to_pci_dev(s_device), &e_info) ==
|
|
|
|
AER_SUCCESS) {
|
|
|
|
aer_print_error(to_pci_dev(s_device), &e_info);
|
|
|
|
handle_error_source(p_device,
|
|
|
|
to_pci_dev(s_device),
|
|
|
|
e_info);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* aer_isr - consume errors detected by root port
|
|
|
|
* @context: pointer to a private data of pcie device
|
|
|
|
*
|
|
|
|
* Invoked, as DPC, when root port records new detected error
|
|
|
|
**/
|
|
|
|
void aer_isr(void *context)
|
|
|
|
{
|
|
|
|
struct pcie_device *p_device = (struct pcie_device *) context;
|
|
|
|
struct aer_rpc *rpc = get_service_data(p_device);
|
|
|
|
struct aer_err_source *e_src;
|
|
|
|
|
|
|
|
mutex_lock(&rpc->rpc_mutex);
|
|
|
|
e_src = get_e_source(rpc);
|
|
|
|
while (e_src) {
|
|
|
|
aer_isr_one_error(p_device, e_src);
|
|
|
|
e_src = get_e_source(rpc);
|
|
|
|
}
|
|
|
|
mutex_unlock(&rpc->rpc_mutex);
|
|
|
|
|
|
|
|
wake_up(&rpc->wait_release);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* aer_delete_rootport - disable root port aer and delete service data
|
|
|
|
* @rpc: pointer to a root port device being deleted
|
|
|
|
*
|
|
|
|
* Invoked when AER service unloaded on a specific Root Port
|
|
|
|
**/
|
|
|
|
void aer_delete_rootport(struct aer_rpc *rpc)
|
|
|
|
{
|
|
|
|
/* Disable root port AER itself */
|
|
|
|
disable_root_aer(rpc);
|
|
|
|
|
|
|
|
kfree(rpc);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* aer_init - provide AER initialization
|
|
|
|
* @dev: pointer to AER pcie device
|
|
|
|
*
|
|
|
|
* Invoked when AER service driver is loaded.
|
|
|
|
**/
|
|
|
|
int aer_init(struct pcie_device *dev)
|
|
|
|
{
|
|
|
|
int status;
|
|
|
|
|
|
|
|
/* Run _OSC Method */
|
|
|
|
status = aer_osc_setup(dev->port);
|
|
|
|
|
|
|
|
if(status != OSC_METHOD_RUN_SUCCESS) {
|
|
|
|
printk(KERN_DEBUG "%s: AER service init fails - %s\n",
|
|
|
|
__FUNCTION__,
|
|
|
|
(status == OSC_METHOD_NOT_SUPPORTED) ?
|
|
|
|
"No ACPI _OSC support" : "Run ACPI _OSC fails");
|
|
|
|
|
|
|
|
if (!forceload)
|
|
|
|
return status;
|
|
|
|
}
|
|
|
|
|
|
|
|
return AER_SUCCESS;
|
|
|
|
}
|
|
|
|
|
|
|
|
EXPORT_SYMBOL_GPL(pci_find_aer_capability);
|
|
|
|
EXPORT_SYMBOL_GPL(pci_enable_pcie_error_reporting);
|
|
|
|
EXPORT_SYMBOL_GPL(pci_disable_pcie_error_reporting);
|
|
|
|
EXPORT_SYMBOL_GPL(pci_cleanup_aer_uncorrect_error_status);
|
|
|
|
|