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SubjectRe: [PATCH v14 0/5] Add Error Disconnect Recover (EDR) support
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Hi Bjorn,

On 2/12/20 6:38 AM, Bjorn Helgaas wrote:
> On Fri, Feb 07, 2020 at 04:03:30PM -0800, sathyanarayanan.kuppuswamy@linux.intel.com wrote:
>> From: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
>>
>> This patchset adds support for following features:
>>
>> 1. Error Disconnect Recover (EDR) support.
>> 2. _OSC based negotiation support for DPC.
>>
>> You can find EDR spec in the following link.
>>
>> https://members.pcisig.com/wg/PCI-SIG/document/12614
> Hi Sathy,
>
> Bad timing! Linus tagged v5.6-rc1 on Feb 9, shortly after you posted
> this. Would you mind refreshing this so it applies on my "master"
> branch (v5.6-rc1)?
Sure.
>
>> Changes since v13:
>> * Moved all EDR related code to edr.c
>> * Addressed Bjorns comments.
>>
>> Changes since v12:
>> * Addressed Bjorns comments.
>> * Added check for CONFIG_PCIE_EDR before requesting DPC control from firmware.
>> * Removed ff_check parameter from AER APIs.
>> * Used macros for _OST return status values in DPC driver.
>>
>> Changes since v11:
>> * Allowed error recovery to proceed after successful reset_link().
>> * Used correct ACPI handle for sending EDR status.
>> * Rebased on top of v5.5-rc5
>>
>> Changes since v10:
>> * Added "edr_enabled" member to dpc priv structure, which is used to cache EDR
>> enabling status based on status of pcie_ports_dpc_native and FF mode.
>> * Changed type of _DSM argument from Integer to Package in acpi_enable_dpc_port()
>> function to fix ACPI related boot warnings.
>> * Rebased on top of v5.5-rc3
>>
>> Changes since v9:
>> * Removed caching of pcie_aer_get_firmware_first() in dpc driver.
>> * Added proper spec reference in git log for patch 5 & 7.
>> * Added new function parameter "ff_check" to pci_cleanup_aer_uncorrect_error_status(),
>> pci_aer_clear_fatal_status() and pci_cleanup_aer_error_status_regs() functions.
>> * Rebased on top of v5.4-rc5
>>
>> Changes since v8:
>> * Rebased on top of v5.4-rc1
>>
>> Changes since v7:
>> * Updated DSM version number to match the spec.
>>
>> Changes since v6:
>> * Modified the order of patches to enable EDR only after all necessary support is added in kernel.
>> * Addressed Bjorn comments.
>>
>> Changes since v5:
>> * Addressed Keith's comments.
>> * Added additional check for FF mode in pci_aer_init().
>> * Updated commit history of "PCI/DPC: Add support for DPC recovery on NON_FATAL errors" patch.
>>
>> Changes since v4:
>> * Rebased on top of v5.3-rc1
>> * Fixed lock/unlock issue in edr_handle_event().
>> * Merged "Update error status after reset_link()" patch into this patchset.
>>
>> Changes since v3:
>> * Moved EDR related ACPI functions/definitions to pci-acpi.c
>> * Modified commit history in few patches to include spec reference.
>> * Added support to handle DPC triggered by NON_FATAL errors.
>> * Added edr_lock to protect PCI device receiving duplicate EDR notifications.
>> * Addressed Bjorn comments.
>>
>> Changes since v2:
>> * Split EDR support patch into multiple patches.
>> * Addressed Bjorn comments.
>>
>> Changes since v1:
>> * Rebased on top of v5.1-rc1
>>
>> Kuppuswamy Sathyanarayanan (5):
>> PCI/ERR: Update error status after reset_link()
>> PCI/DPC: Remove pcie_device reference from dpc_dev structure
>> PCI/EDR: Export AER, DPC and error recovery functions
>> PCI/DPC: Add Error Disconnect Recover (EDR) support
>> PCI/ACPI: Enable EDR support
>>
>> drivers/acpi/pci_root.c | 16 +++
>> drivers/pci/pci-acpi.c | 3 +
>> drivers/pci/pci.h | 8 ++
>> drivers/pci/pcie/Kconfig | 10 ++
>> drivers/pci/pcie/Makefile | 1 +
>> drivers/pci/pcie/aer.c | 39 ++++--
>> drivers/pci/pcie/dpc.c | 92 ++++++++------
>> drivers/pci/pcie/dpc.h | 20 +++
>> drivers/pci/pcie/edr.c | 259 ++++++++++++++++++++++++++++++++++++++
>> drivers/pci/pcie/err.c | 35 ++++--
>> drivers/pci/probe.c | 1 +
>> include/linux/acpi.h | 6 +-
>> include/linux/pci-acpi.h | 8 ++
>> include/linux/pci.h | 1 +
>> 14 files changed, 441 insertions(+), 58 deletions(-)
>> create mode 100644 drivers/pci/pcie/dpc.h
>> create mode 100644 drivers/pci/pcie/edr.c
>>
>> --
>> 2.21.0
>>
--
Sathyanarayanan Kuppuswamy
Linux kernel developer

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