From: leoliu-oc <leoliu-oc@xxxxxxxxxxx>
apei_hest_parse_aer() is used to parse and extract register values
from HEST PCIe AER structures.
Signed-off-by: leoliu-oc <leoliu-oc@xxxxxxxxxxx>
---
drivers/acpi/apei/hest.c | 115 ++++++++++++++++++++++++++++++++++++++-
include/acpi/actbl1.h | 69 +++++++++++++++++++++++
include/acpi/apei.h | 7 +++
3 files changed, 189 insertions(+), 2 deletions(-)
diff --git a/drivers/acpi/apei/hest.c b/drivers/acpi/apei/hest.c
index 6aef1ee5e1bd..ab1ffe6923ce 100644
--- a/drivers/acpi/apei/hest.c
+++ b/drivers/acpi/apei/hest.c
@@ -25,7 +25,7 @@
#include <linux/platform_device.h>
#include <acpi/apei.h>
#include <acpi/ghes.h>
-
+#include <linux/pci.h>
#include "apei-internal.h"
#define HEST_PFX "HEST: "
@@ -86,7 +86,50 @@ static int hest_esrc_len(struct acpi_hest_header *hest_hdr)
return len;
};
-typedef int (*apei_hest_func_t)(struct acpi_hest_header *hest_hdr, void *data);
+static bool hest_source_is_pcie_aer(struct acpi_hest_header *hest_hdr)
+{
+ switch (hest_hdr->type) {
+ case ACPI_HEST_TYPE_AER_ROOT_PORT:
+ case ACPI_HEST_TYPE_AER_ENDPOINT:
+ case ACPI_HEST_TYPE_AER_BRIDGE:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool hest_match_type(struct acpi_hest_header *hest_hdr,
+ struct pci_dev *dev)
+{
+ u16 hest_type = hest_hdr->type;
+ u8 pcie_type = pci_pcie_type(dev);
+
+ if ((hest_type == ACPI_HEST_TYPE_AER_ROOT_PORT &&
+ pcie_type == PCI_EXP_TYPE_ROOT_PORT) ||
+ (hest_type == ACPI_HEST_TYPE_AER_ENDPOINT &&
+ pcie_type == PCI_EXP_TYPE_ENDPOINT) ||
+ (hest_type == ACPI_HEST_TYPE_AER_BRIDGE &&
+ (pcie_type == PCI_EXP_TYPE_PCI_BRIDGE || pcie_type == PCI_EXP_TYPE_PCIE_BRIDGE)))
+ return true;
+ return false;
+}
+
+static bool hest_match_pci_devfn(struct acpi_hest_aer_common *p,
+ struct pci_dev *pci)
+{
+ return ACPI_HEST_SEGMENT(p->bus) == pci_domain_nr(pci->bus) &&
+ ACPI_HEST_BUS(p->bus) == pci->bus->number &&
+ p->device == PCI_SLOT(pci->devfn) &&
+ p->function == PCI_FUNC(pci->devfn);
+}
+
+static bool hest_match_pci(struct acpi_hest_header *hest_hdr,
+ struct acpi_hest_aer_common *p, struct pci_dev *pci)
+{
+ if (hest_match_type(hest_hdr, pci))
+ return hest_match_pci_devfn(p, pci);
+ return false;
+}
static int apei_hest_parse(apei_hest_func_t func, void *data)
{
@@ -124,6 +167,74 @@ static int apei_hest_parse(apei_hest_func_t func, void *data)
return 0;
}
+/*
+ * apei_hest_parse_aer - Find the AER structure in the HEST and
+ * match it with the PCIe device.
+ *
+ * @hest_hdr: To save the ACPI AER error source in HEST
+ *
+ * Return 1 if the PCIe dev matched with the ACPI AER error source in
+ * HEST, else return 0.
+ */
+int apei_hest_parse_aer(struct acpi_hest_header *hest_hdr, void *data)
+{
+ struct acpi_hest_parse_aer_info *info = data;
+ struct acpi_hest_aer_endpoint *acpi_hest_aer_endpoint = NULL;
+ struct acpi_hest_aer_root_port *acpi_hest_aer_root_port = NULL;
+ struct acpi_hest_aer_for_bridge *acpi_hest_aer_for_bridge = NULL;
+
+ if (!hest_source_is_pcie_aer(hest_hdr))
+ return 0;
+
+ switch (hest_hdr->type) {
+ case ACPI_HEST_TYPE_AER_ROOT_PORT:
+ acpi_hest_aer_root_port = (struct acpi_hest_aer_root_port *)(hest_hdr + 1);
+ if (acpi_hest_aer_root_port->flags & ACPI_HEST_GLOBAL) {
+ if (hest_match_type(hest_hdr, info->pci_dev)) {
+ info->acpi_hest_aer_root_port = acpi_hest_aer_root_port;
+ info->hest_matched_with_dev = 1;
+ }
+ } else if (hest_match_pci(hest_hdr,
+ (struct acpi_hest_aer_common *)acpi_hest_aer_root_port,
+ info->pci_dev)) {
+ info->acpi_hest_aer_root_port = acpi_hest_aer_root_port;
+ info->hest_matched_with_dev = 1;
+ }
+ break;
+ case ACPI_HEST_TYPE_AER_ENDPOINT:
+ acpi_hest_aer_endpoint = (struct acpi_hest_aer_endpoint *)(hest_hdr + 1);
+ if (acpi_hest_aer_endpoint->flags & ACPI_HEST_GLOBAL) {
+ if (hest_match_type(hest_hdr, info->pci_dev)) {
+ info->acpi_hest_aer_endpoint = acpi_hest_aer_endpoint;
+ info->hest_matched_with_dev = 1;
+ }
+ } else if (hest_match_pci(hest_hdr,
+ (struct acpi_hest_aer_common *)acpi_hest_aer_endpoint,
+ info->pci_dev)) {
+ info->acpi_hest_aer_endpoint = acpi_hest_aer_endpoint;
+ info->hest_matched_with_dev = 1;
+ }
+ break;
+ case ACPI_HEST_TYPE_AER_BRIDGE:
+ acpi_hest_aer_for_bridge = (struct acpi_hest_aer_for_bridge *)(hest_hdr + 1);
+ if (acpi_hest_aer_for_bridge->flags & ACPI_HEST_GLOBAL) {
+ if (hest_match_type(hest_hdr, info->pci_dev)) {
+ info->acpi_hest_aer_for_bridge = acpi_hest_aer_for_bridge;
+ info->hest_matched_with_dev = 1;
+ }
+ } else if (hest_match_pci(hest_hdr,
+ (struct acpi_hest_aer_common *)acpi_hest_aer_for_bridge,
+ info->pci_dev)) {
+ info->acpi_hest_aer_for_bridge = acpi_hest_aer_for_bridge;
+ info->hest_matched_with_dev = 1;
+ }
+ break;
+ default:
+ break;
+ }
+ return info->hest_matched_with_dev;
+}
+
/*
* Check if firmware advertises firmware first mode. We need FF bit to be set
* along with a set of MC banks which work in FF mode.
diff --git a/include/acpi/actbl1.h b/include/acpi/actbl1.h
index 15c78678c5d3..a3540133ddce 100644
--- a/include/acpi/actbl1.h
+++ b/include/acpi/actbl1.h
@@ -1385,6 +1385,75 @@ struct acpi_hest_aer_bridge {
u32 advanced_capabilities2;
};
+struct acpi_hest_parse_aer_info {
+ struct pci_dev *pci_dev;
+ int hest_matched_with_dev;
+ struct acpi_hest_aer_endpoint *acpi_hest_aer_endpoint;
+ struct acpi_hest_aer_root_port *acpi_hest_aer_root_port;
+ struct acpi_hest_aer_for_bridge *acpi_hest_aer_for_bridge;
+};
+
+/* HEST Sub-structure for PCIe Root Port Structure (6) */
+
+struct acpi_hest_aer_root_port {
+ u16 reserved1;
+ u8 flags;
+ u8 enabled;
+ u32 records_to_preallocate;
+ u32 max_sections_per_record;
+ u32 bus;
+ u16 device;
+ u16 function;
+ u16 device_control;
+ u16 reserved2;
+ u32 uncorrectable_mask;
+ u32 uncorrectable_severity;
+ u32 correctable_mask;
+ u32 advanced_capabilities;
+ u32 root_error_command;
+};
+
+/* HEST Sub-structure for PCIe Endpoint Structure (7) */
+
+struct acpi_hest_aer_endpoint {
+ u16 reserved1;
+ u8 flags;
+ u8 enabled;
+ u32 records_to_preallocate;
+ u32 max_sections_per_record;
+ u32 bus;
+ u16 device;
+ u16 function;
+ u16 device_control;
+ u16 reserved2;
+ u32 uncorrectable_mask;
+ u32 uncorrectable_severity;
+ u32 correctable_mask;
+ u32 advanced_capabilities;
+};
+
+/* HEST Sub-structure for PCIe/PCI-X Bridge Structure (8) */
+
+struct acpi_hest_aer_for_bridge {
+ u16 reserved1;
+ u8 flags;
+ u8 enabled;
+ u32 records_to_preallocate;
+ u32 max_sections_per_record;
+ u32 bus;
+ u16 device;
+ u16 function;
+ u16 device_control;
+ u16 reserved2;
+ u32 uncorrectable_mask;
+ u32 uncorrectable_severity;
+ u32 correctable_mask;
+ u32 advanced_capabilities;
+ u32 uncorrectable_mask2;
+ u32 uncorrectable_severity2;
+ u32 advanced_capabilities2;
+};
+
/* 9: Generic Hardware Error Source */
struct acpi_hest_generic {
diff --git a/include/acpi/apei.h b/include/acpi/apei.h
index dc60f7db5524..8a0b2b9edbaf 100644
--- a/include/acpi/apei.h
+++ b/include/acpi/apei.h
@@ -33,10 +33,17 @@ 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);
+
#ifdef CONFIG_ACPI_APEI
void __init acpi_hest_init(void);
+int apei_hest_parse_aer(struct acpi_hest_header *hest_hdr, void *data);
#else
static inline void acpi_hest_init(void) { }
+static inline int apei_hest_parse_aer(struct acpi_hest_header *hest_hdr, void *data)
+{
+ return -EINVAL;
+}
#endif
int erst_write(const struct cper_record_header *record);
--
2.20.1
