From: LeoLiuoc <LeoLiu-oc@xxxxxxxxxxx>
The purpose of the function apei_hest_parse_aer() is used to parse and
extract register value from HEST PCIe AER structures. This applies to
all hardware platforms that has a PCI Express AER structure in HEST.
Signed-off-by: LeoLiuoc <LeoLiu-oc@xxxxxxxxxxx>
---
drivers/acpi/apei/hest.c | 52 +++++++++++++++++++++++++++++++++++++++-
include/acpi/apei.h | 11 +++++++++
2 files changed, 62 insertions(+), 1 deletion(-)
diff --git a/drivers/acpi/apei/hest.c b/drivers/acpi/apei/hest.c
index 35d08f4e50e6..e7a15d60ecc1 100644
--- a/drivers/acpi/apei/hest.c
+++ b/drivers/acpi/apei/hest.c
@@ -22,6 +22,7 @@
#include <linux/kdebug.h>
#include <linux/highmem.h>
#include <linux/io.h>
+#include <linux/pci.h>
#include <linux/platform_device.h>
#include <acpi/apei.h>
#include <acpi/ghes.h>
@@ -132,7 +133,56 @@ static bool is_ghes_assist_struct(struct acpi_hest_header *hest_hdr)
return false;
}
-typedef int (*apei_hest_func_t)(struct acpi_hest_header *hest_hdr, void *data);
+static bool hest_match_pci_devfn(struct acpi_hest_aer_common *p, struct pci_dev *dev)
+{
+ return ACPI_HEST_SEGMENT(p->bus) == pci_domain_nr(dev->bus) &&
+ ACPI_HEST_BUS(p->bus) == dev->bus->number &&
+ p->device == PCI_SLOT(dev->devfn) &&
+ p->function == PCI_FUNC(dev->devfn);
+}
+
+static bool hest_source_is_pcie_aer(struct acpi_hest_header *hest_hdr, struct pci_dev *dev)
+{
+ u16 hest_type = hest_hdr->type;
+ u8 pcie_type = pci_pcie_type(dev);
+ struct acpi_hest_aer_common *common = (struct acpi_hest_aer_common *)(hest_hdr + 1);
+
+ switch (hest_type) {
+ case ACPI_HEST_TYPE_AER_ROOT_PORT:
+ if (pcie_type != PCI_EXP_TYPE_ROOT_PORT)
+ return false;
+ break;
+ case ACPI_HEST_TYPE_AER_ENDPOINT:
+ if (pcie_type != PCI_EXP_TYPE_ENDPOINT)
+ return false;
+ break;
+ case ACPI_HEST_TYPE_AER_BRIDGE:
+ if (pcie_type != PCI_EXP_TYPE_PCI_BRIDGE && pcie_type != PCI_EXP_TYPE_PCIE_BRIDGE)
+ return false;
+ break;
+ default:
+ return false;
+ }
+
+ if (common->flags & ACPI_HEST_GLOBAL)
+ return true;
+
+ if (hest_match_pci_devfn(common, dev))
+ return true;
+
+ return false;
+}
+
+int hest_parse_pcie_aer(struct acpi_hest_header *hest_hdr, void *data)
+{
+ struct hest_parse_aer_info *info = data;
+
+ info->data = (void *)hest_hdr;
+ if (!hest_source_is_pcie_aer(hest_hdr, info->pci_dev))
+ return 0;
+ else
+ return 1;
+}
int apei_hest_parse(apei_hest_func_t func, void *data)
{
diff --git a/include/acpi/apei.h b/include/acpi/apei.h
index b79976daa4bb..047e0469927c 100644
--- a/include/acpi/apei.h
+++ b/include/acpi/apei.h
@@ -23,6 +23,11 @@ enum hest_status {
HEST_NOT_FOUND,
};
+struct hest_parse_aer_info {
+ struct pci_dev *pci_dev;
+ void *data;
+};
+
extern int hest_disable;
extern int erst_disable;
#ifdef CONFIG_ACPI_APEI_GHES
@@ -33,12 +38,18 @@ void __init acpi_ghes_init(void);
static inline void acpi_ghes_init(void) { }
#endif
+typedef int (*apei_hest_func_t)(struct acpi_hest_header *hest_hdr, void *data);
int apei_hest_parse(apei_hest_func_t func, void *data);
#ifdef CONFIG_ACPI_APEI
void __init acpi_hest_init(void);
+int hest_parse_pcie_aer(struct acpi_hest_header *hest_hdr, void *data);
#else
static inline void acpi_hest_init(void) { }
+static inline int hest_parse_pcie_aer(struct acpi_hest_header *hest_hdr, void *data)
+{
+ return 0;
+}
#endif
int erst_write(const struct cper_record_header *record);
--
2.34.1
