[PATCH v5 0/4] Address error and recovery for AER and DPC

[Oza Pawandeep]

This patch set brings in error handling support for DPC

The current implementation of AER and error message broadcasting to the
EP driver is tightly coupled and limited to AER service driver.
It is important to factor out broadcasting and other link handling
callbacks. So that not only when AER gets triggered, but also when DPC get
triggered (for e.g. ERR_FATAL), callbacks are handled appropriately.

DPC should enumerate the devices after recovering the link, which is
achieved by implementing error_resume callback.

Changes since v4:
	Bjorn's comments incorporated.
		> Renamed only do_recovery.
		> moved the things more locally to drivers/pci/pci.h
Changes since v3:
	Bjorn's comments incorporated.
		> Made separate patch renaming generic pci_err.c
		> Introduce pci_err.h to contain all the error types and recovery
		> removed all the dependencies on pci.h
Changes since v2:
	Based on feedback from Keith:
	"
	When DPC is triggered due to receipt of an uncorrectable error Message,
	the Requester ID from the Message is recorded in the DPC Error
	Source ID register and that Message is discarded and not forwarded Upstream.
	"
	Removed the patch where AER checks if DPC service is active
Changes since v1:
	Kbuild errors fixed:
		> pci_find_dpc_dev made static
		> ras_event.h updated
		> pci_find_aer_service call with CONFIG check
		> pci_find_dpc_service call with CONFIG check

Oza Pawandeep (4):
  PCI/AER: factor out error reporting from AER
  PCI/DPC/AER: Address Concurrency between AER and DPC
  PCI/ERR: Do not do recovery if DPC service is active
  PCI/DPC: Enumerate the devices after DPC trigger event

 drivers/acpi/apei/ghes.c               |   2 +-
 drivers/pci/pcie/Makefile              |   2 +-
 drivers/pci/pcie/aer/aerdrv.h          |  30 ---
 drivers/pci/pcie/aer/aerdrv_core.c     | 306 +------------------------
 drivers/pci/pcie/aer/aerdrv_errprint.c |  27 ++-
 drivers/pci/pcie/pcie-dpc.c            | 127 ++++++++++-
 drivers/pci/pcie/pcie-err.c            | 399 +++++++++++++++++++++++++++++++++
 drivers/pci/pcie/portdrv.h             |   2 +
 include/linux/aer.h                    |   4 -
 include/linux/pci.h                    |  23 ++
 include/ras/ras_event.h                |   6 +-
 11 files changed, 579 insertions(+), 349 deletions(-)
 create mode 100644 drivers/pci/pcie/pcie-err.c

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