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PCI-Express AER implemetation: AER core and aerdriver

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Patch 3 implements the core part of PCI-Express AER and aerdrv
port service driver.

When a root port service device is probed, the aerdrv will call
request_irq to register irq handler for AER error interrupt.

When a device sends an PCI-Express error message to the root port,
the root port will trigger an interrupt, by either MSI or IO-APIC,
then kernel would run the irq handler. The handler collects root
error status register and schedules a work. The work will call
the core part to process the error based on its type
(Correctable/non-fatal/fatal).

As for Correctable errors, the patch chooses to just clear the correctable
error status register of the device.

As for the non-fatal error, the patch follows generic PCI error handler
rules to call the error callback functions of the endpoint's driver. If
the device is a bridge, the patch chooses to broadcast the error to
downstream devices.

As for the fatal error, the patch resets the pci-express link and
follows generic PCI error handler rules to call the error callback
functions of the endpoint's driver. If the device is a bridge, the patch
chooses to broadcast the error to downstream devices.

Signed-off-by: Zhang Yanmin <yanmin.zhang@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Zhang, Yanmin
2006-07-31 15:21:33 +08:00
committed by Greg Kroah-Hartman
parent 48408157eb
commit 6c2b374d74
11 changed files with 1598 additions and 0 deletions
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24
include/linux/aer.h Normal file
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@@ -0,0 +1,24 @@
/*
* Copyright (C) 2006 Intel Corp.
* Tom Long Nguyen (tom.l.nguyen@intel.com)
* Zhang Yanmin (yanmin.zhang@intel.com)
*/
#ifndef _AER_H_
#define _AER_H_
#if defined(CONFIG_PCIEAER)
/* pci-e port driver needs this function to enable aer */
extern int pci_enable_pcie_error_reporting(struct pci_dev *dev);
extern int pci_find_aer_capability(struct pci_dev *dev);
extern int pci_disable_pcie_error_reporting(struct pci_dev *dev);
extern int pci_cleanup_aer_uncorrect_error_status(struct pci_dev *dev);
#else
#define pci_enable_pcie_error_reporting(dev) do { } while (0)
#define pci_find_aer_capability(dev) do { } while (0)
#define pci_disable_pcie_error_reporting(dev) do { } while (0)
#define pci_cleanup_aer_uncorrect_error_status(dev) do { } while (0)
#endif
#endif //_AER_H_

6
include/linux/pcieport_if.h
View File

@@ -62,6 +62,12 @@ struct pcie_port_service_driver {
int (*suspend) (struct pcie_device *dev, pm_message_t state);
int (*resume) (struct pcie_device *dev);
/* Service Error Recovery Handler */
struct pci_error_handlers *err_handler;
/* Link Reset Capability - AER service driver specific */
pci_ers_result_t (*reset_link) (struct pci_dev *dev);
const struct pcie_port_service_id *id_table;
struct device_driver driver;
};