ACPI, APEI, GHES: Add PCIe AER recovery support

aer_recover_queue() is called when recoverable PCIe AER errors are
notified by firmware to do the recovery work.

Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
index b8e08cb..511b971 100644 (file)
--- a/drivers/acpi/apei/ghes.c
+++ b/drivers/acpi/apei/ghes.c
@@ -45,6 +45,8 @@
 #include <linux/irq_work.h>
 #include <linux/llist.h>
 #include <linux/genalloc.h>
+#include <linux/pci.h>
+#include <linux/aer.h>
 #include <acpi/apei.h>
 #include <acpi/atomicio.h>
 #include <acpi/hed.h>
@@ -476,6 +478,27 @@ static void ghes_do_proc(const struct acpi_hest_generic_status *estatus)
                        }
 #endif
                }
+#ifdef CONFIG_ACPI_APEI_PCIEAER
+               else if (!uuid_le_cmp(*(uuid_le *)gdata->section_type,
+                                     CPER_SEC_PCIE)) {
+                       struct cper_sec_pcie *pcie_err;
+                       pcie_err = (struct cper_sec_pcie *)(gdata+1);
+                       if (sev == GHES_SEV_RECOVERABLE &&
+                           sec_sev == GHES_SEV_RECOVERABLE &&
+                           pcie_err->validation_bits & CPER_PCIE_VALID_DEVICE_ID &&
+                           pcie_err->validation_bits & CPER_PCIE_VALID_AER_INFO) {
+                               unsigned int devfn;
+                               int aer_severity;
+                               devfn = PCI_DEVFN(pcie_err->device_id.device,
+                                                 pcie_err->device_id.function);
+                               aer_severity = cper_severity_to_aer(sev);
+                               aer_recover_queue(pcie_err->device_id.segment,
+                                                 pcie_err->device_id.bus,
+                                                 devfn, aer_severity);
+                       }
+
+               }
+#endif
        }
 }