[PATCH v8 0/8] Add Error Disconnect Recover (EDR) support

From: sathyanarayanan . kuppuswamy
Date: Tue Aug 27 2019 - 13:32:54 EST

From: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@xxxxxxxxxxxxxxx>

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.


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 (8):
PCI/ERR: Update error status after reset_link()
PCI/DPC: Allow dpc_probe() even if firmware first mode is enabled
PCI/DPC: Add dpc_process_error() wrapper function
PCI/DPC: Add Error Disconnect Recover (EDR) support
PCI/AER: Allow clearing Error Status Register in FF mode
PCI/DPC: Update comments related to DPC recovery on NON_FATAL errors
PCI/DPC: Clear AER registers in EDR mode
PCI/ACPI: Enable EDR support

drivers/acpi/pci_root.c | 9 ++
drivers/pci/pci-acpi.c | 91 +++++++++++++++
drivers/pci/pcie/Kconfig | 10 ++
drivers/pci/pcie/aer.c | 12 +-
drivers/pci/pcie/dpc.c | 194 +++++++++++++++++++++++++++++---
drivers/pci/pcie/err.c | 10 +-
drivers/pci/pcie/portdrv_core.c | 8 +-
drivers/pci/probe.c | 1 +
include/linux/acpi.h | 6 +-
include/linux/pci-acpi.h | 11 ++
include/linux/pci.h | 3 +-
11 files changed, 321 insertions(+), 34 deletions(-)