diff options
| author | Qiuxu Zhuo | 2020-11-20 16:10:33 -0800 |
|---|---|---|
| committer | Bjorn Helgaas | 2020-12-05 15:26:02 -0600 |
| commit | 5790862255028c831761e13014ee87a06df828f1 (patch) | |
| tree | 02cd3506419d2df7a2ff68ce45d380f53a129844 /drivers/pci/pcie/err.c | |
| parent | 507b460f814458605c47b0ed03c11e49a712fc08 (diff) | |
PCI/ERR: Recover from RCiEP AER errors
Add support for handling AER errors detected by Root Complex Integrated
Endpoints (RCiEPs). These errors are signaled to software natively via a
Root Complex Event Collector (RCEC) or non-natively via ACPI APEI if the
platform retains control of AER or uses a non-standard RCEC-like device.
When recovering from RCiEP errors, the Root Error Command and Status
registers are in the AER Capability of an associated RCEC (if any), not in
a Root Port. In the non-native case, the platform is responsible for those
registers and we can't touch them.
[bhelgaas: commit log, etc]
Co-developed-by: Sean V Kelley <sean.v.kelley@intel.com>
Link: https://lore.kernel.org/r/20201121001036.8560-13-sean.v.kelley@intel.com
Signed-off-by: Sean V Kelley <sean.v.kelley@intel.com>
Signed-off-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci/pcie/err.c')
| -rw-r--r-- | drivers/pci/pcie/err.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/drivers/pci/pcie/err.c b/drivers/pci/pcie/err.c index 87a2dc8d17f8..510f31f0ef6d 100644 --- a/drivers/pci/pcie/err.c +++ b/drivers/pci/pcie/err.c @@ -148,7 +148,7 @@ out: /** * pci_walk_bridge - walk bridges potentially AER affected - * @bridge: bridge which may be a Port or an RCEC + * @bridge: bridge which may be a Port, an RCEC, or an RCiEP * @cb: callback to be called for each device found * @userdata: arbitrary pointer to be passed to callback * @@ -156,8 +156,8 @@ out: * any bridged devices on buses under this bus. Call the provided callback * on each device found. * - * If the device provided has no subordinate bus, e.g., an RCEC, call the - * callback on the device itself. + * If the device provided has no subordinate bus, e.g., an RCEC or RCiEP, + * call the callback on the device itself. */ static void pci_walk_bridge(struct pci_dev *bridge, int (*cb)(struct pci_dev *, void *), @@ -179,9 +179,9 @@ pci_ers_result_t pcie_do_recovery(struct pci_dev *dev, struct pci_host_bridge *host = pci_find_host_bridge(dev->bus); /* - * If the error was detected by a Root Port, Downstream Port, or - * RCEC, recovery runs on the device itself. For Ports, that also - * includes any subordinate devices. + * If the error was detected by a Root Port, Downstream Port, RCEC, + * or RCiEP, recovery runs on the device itself. For Ports, that + * also includes any subordinate devices. * * If it was detected by another device (Endpoint, etc), recovery * runs on the device and anything else under the same Port, i.e., @@ -189,7 +189,8 @@ pci_ers_result_t pcie_do_recovery(struct pci_dev *dev, */ if (type == PCI_EXP_TYPE_ROOT_PORT || type == PCI_EXP_TYPE_DOWNSTREAM || - type == PCI_EXP_TYPE_RC_EC) + type == PCI_EXP_TYPE_RC_EC || + type == PCI_EXP_TYPE_RC_END) bridge = dev; else bridge = pci_upstream_bridge(dev); |