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 -- 2.28.0
