diff options
author | Zhang, Yanmin <yanmin.zhang@intel.com> | 2006-07-31 03:21:33 -0400 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@suse.de> | 2006-09-26 20:43:53 -0400 |
commit | 6c2b374d74857e892080ee726184ec1d15e7d4e4 (patch) | |
tree | c107532c288bcede80e45ebc3e46292bfaf0cea2 /include/linux/aer.h | |
parent | 48408157ebf5b2c6dc1e04ba5d258012f6a7f356 (diff) |
PCI-Express AER implemetation: AER core and aerdriver
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>
Diffstat (limited to 'include/linux/aer.h')
-rw-r--r-- | include/linux/aer.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/include/linux/aer.h b/include/linux/aer.h new file mode 100644 index 000000000000..402e178b38eb --- /dev/null +++ b/include/linux/aer.h | |||
@@ -0,0 +1,24 @@ | |||
1 | /* | ||
2 | * Copyright (C) 2006 Intel Corp. | ||
3 | * Tom Long Nguyen (tom.l.nguyen@intel.com) | ||
4 | * Zhang Yanmin (yanmin.zhang@intel.com) | ||
5 | */ | ||
6 | |||
7 | #ifndef _AER_H_ | ||
8 | #define _AER_H_ | ||
9 | |||
10 | #if defined(CONFIG_PCIEAER) | ||
11 | /* pci-e port driver needs this function to enable aer */ | ||
12 | extern int pci_enable_pcie_error_reporting(struct pci_dev *dev); | ||
13 | extern int pci_find_aer_capability(struct pci_dev *dev); | ||
14 | extern int pci_disable_pcie_error_reporting(struct pci_dev *dev); | ||
15 | extern int pci_cleanup_aer_uncorrect_error_status(struct pci_dev *dev); | ||
16 | #else | ||
17 | #define pci_enable_pcie_error_reporting(dev) do { } while (0) | ||
18 | #define pci_find_aer_capability(dev) do { } while (0) | ||
19 | #define pci_disable_pcie_error_reporting(dev) do { } while (0) | ||
20 | #define pci_cleanup_aer_uncorrect_error_status(dev) do { } while (0) | ||
21 | #endif | ||
22 | |||
23 | #endif //_AER_H_ | ||
24 | |||