[PATCH v6 00/10] Add RCEC handling to PCI/AER

[Sean V Kelley]

From: Sean V Kelley <sean.v.kelley@xxxxxxxxx>

Changes since v5 and v4:

- Note that not all of the patches in v4 made it to the lists due
possible errors on the smtp server side. It's being investigated.
- Removed two Reviewed-by tags on the patches for pcie_walk_rcec()
due to significant functionality changes.
- Made walk_rcec() static.
- Bumped to v6, with hope this makes it completely to the lists.

Changes since v3 [1]:

- Merge usage patch and API (pcie_walk_rcec).
(Sathyanarayanan Kuppuswamy)

- Considering the possible ways to call pcie_do_recovery(), make
the flow more understandable through assignments of the incoming
devices in terms of 'bridges'.
- reset_link() may be misnamed. The point is really to reset any devices
below 'dev', which is a bridge. Using reset_subordinate_devices() makes it
more clear that we pass a bridge and reset the devices *below* it.
- In pcie_walk_rcec() an RCEC bus number does not indicate association
in the Assocated Bus Numbers register so skip it (7.9.10.3)
- Potential for a lot of churning to call pci_get_slot() in
pcie_walk_rciep_Devfn(). Attempt to reduce the number of calls by identifying
the associations through bus walks.
- Change pr_dbg of link RCiEP to "PME & error events reported via.."
(Bjorn Helgaas)

- In some cases (AER via APEI) there may not exist an RCEC. In these cases
the bridge is NULL. Account for that in the bridge walk.
(Jonathan Cameron)


[1] https://lore.kernel.org/linux-pci/20200812164659.1118946-1-sean.v.kelley@xxxxxxxxx/



Jonathan Cameron (1):
  PCI/AER: Extend AER error handling to RCECs

Qiuxu Zhuo (5):
  PCI/RCEC: Add RCEC class code and extended capability
  PCI/RCEC: Bind RCEC devices to the Root Port driver
  PCI/AER: Apply function level reset to RCiEP on fatal error
  PCI/RCEC: Add RCiEP's linked RCEC to AER/ERR
  PCI/AER: Add RCEC AER error injection support

Sean V Kelley (4):
  PCI/RCEC: Cache RCEC capabilities in pci_init_capabilities()
  PCI/RCEC: Add pcie_link_rcec() to associate RCiEPs
  PCI/AER: Add pcie_walk_rcec() to RCEC AER handling
  PCI/PME: Add pcie_walk_rcec() to RCEC PME handling

 drivers/pci/pci.h               |  26 ++++-
 drivers/pci/pcie/Makefile       |   2 +-
 drivers/pci/pcie/aer.c          |  36 +++++--
 drivers/pci/pcie/aer_inject.c   |   5 +-
 drivers/pci/pcie/err.c          | 102 ++++++++++++++----
 drivers/pci/pcie/pme.c          |  15 ++-
 drivers/pci/pcie/portdrv_core.c |   8 +-
 drivers/pci/pcie/portdrv_pci.c  |   8 +-
 drivers/pci/pcie/rcec.c         | 185 ++++++++++++++++++++++++++++++++
 drivers/pci/probe.c             |   3 +-
 include/linux/pci.h             |   5 +
 include/linux/pci_ids.h         |   1 +
 include/uapi/linux/pci_regs.h   |   7 ++
 13 files changed, 359 insertions(+), 44 deletions(-)
 create mode 100644 drivers/pci/pcie/rcec.c

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2.28.0