aboutsummaryrefslogtreecommitdiff
path: root/drivers/acpi/hest.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/acpi/hest.c')
-rw-r--r--drivers/acpi/hest.c135
1 files changed, 135 insertions, 0 deletions
diff --git a/drivers/acpi/hest.c b/drivers/acpi/hest.c
new file mode 100644
index 00000000000..4bb18c980ac
--- /dev/null
+++ b/drivers/acpi/hest.c
@@ -0,0 +1,135 @@
+#include <linux/acpi.h>
+#include <linux/pci.h>
+
+#define PREFIX "ACPI: "
+
+static inline unsigned long parse_acpi_hest_ia_machine_check(struct acpi_hest_ia_machine_check *p)
+{
+ return sizeof(*p) +
+ (sizeof(struct acpi_hest_ia_error_bank) * p->num_hardware_banks);
+}
+
+static inline unsigned long parse_acpi_hest_ia_corrected(struct acpi_hest_ia_corrected *p)
+{
+ return sizeof(*p) +
+ (sizeof(struct acpi_hest_ia_error_bank) * p->num_hardware_banks);
+}
+
+static inline unsigned long parse_acpi_hest_ia_nmi(struct acpi_hest_ia_nmi *p)
+{
+ return sizeof(*p);
+}
+
+static inline unsigned long parse_acpi_hest_generic(struct acpi_hest_generic *p)
+{
+ return sizeof(*p);
+}
+
+static inline unsigned int hest_match_pci(struct acpi_hest_aer_common *p, struct pci_dev *pci)
+{
+ return (0 == pci_domain_nr(pci->bus) &&
+ p->bus == pci->bus->number &&
+ p->device == PCI_SLOT(pci->devfn) &&
+ p->function == PCI_FUNC(pci->devfn));
+}
+
+static unsigned long parse_acpi_hest_aer(void *hdr, int type, struct pci_dev *pci, int *firmware_first)
+{
+ struct acpi_hest_aer_common *p = hdr + sizeof(struct acpi_hest_header);
+ unsigned long rc=0;
+ u8 pcie_type = 0;
+ u8 bridge = 0;
+ switch (type) {
+ case ACPI_HEST_TYPE_AER_ROOT_PORT:
+ rc = sizeof(struct acpi_hest_aer_root);
+ pcie_type = PCI_EXP_TYPE_ROOT_PORT;
+ break;
+ case ACPI_HEST_TYPE_AER_ENDPOINT:
+ rc = sizeof(struct acpi_hest_aer);
+ pcie_type = PCI_EXP_TYPE_ENDPOINT;
+ break;
+ case ACPI_HEST_TYPE_AER_BRIDGE:
+ rc = sizeof(struct acpi_hest_aer_bridge);
+ if ((pci->class >> 16) == PCI_BASE_CLASS_BRIDGE)
+ bridge = 1;
+ break;
+ }
+
+ if (p->flags & ACPI_HEST_GLOBAL) {
+ if ((pci->is_pcie && (pci->pcie_type == pcie_type)) || bridge)
+ *firmware_first = !!(p->flags & ACPI_HEST_FIRMWARE_FIRST);
+ }
+ else
+ if (hest_match_pci(p, pci))
+ *firmware_first = !!(p->flags & ACPI_HEST_FIRMWARE_FIRST);
+ return rc;
+}
+
+static int acpi_hest_firmware_first(struct acpi_table_header *stdheader, struct pci_dev *pci)
+{
+ struct acpi_table_hest *hest = (struct acpi_table_hest *)stdheader;
+ void *p = (void *)hest + sizeof(*hest); /* defined by the ACPI 4.0 spec */
+ struct acpi_hest_header *hdr = p;
+
+ int i;
+ int firmware_first = 0;
+ static unsigned char printed_unused = 0;
+ static unsigned char printed_reserved = 0;
+
+ for (i=0, hdr=p; p < (((void *)hest) + hest->header.length) && i < hest->error_source_count; i++) {
+ switch (hdr->type) {
+ case ACPI_HEST_TYPE_IA32_CHECK:
+ p += parse_acpi_hest_ia_machine_check(p);
+ break;
+ case ACPI_HEST_TYPE_IA32_CORRECTED_CHECK:
+ p += parse_acpi_hest_ia_corrected(p);
+ break;
+ case ACPI_HEST_TYPE_IA32_NMI:
+ p += parse_acpi_hest_ia_nmi(p);
+ break;
+ /* These three should never appear */
+ case ACPI_HEST_TYPE_NOT_USED3:
+ case ACPI_HEST_TYPE_NOT_USED4:
+ case ACPI_HEST_TYPE_NOT_USED5:
+ if (!printed_unused) {
+ printk(KERN_DEBUG PREFIX
+ "HEST Error Source list contains an obsolete type (%d).\n", hdr->type);
+ printed_unused = 1;
+ }
+ break;
+ case ACPI_HEST_TYPE_AER_ROOT_PORT:
+ case ACPI_HEST_TYPE_AER_ENDPOINT:
+ case ACPI_HEST_TYPE_AER_BRIDGE:
+ p += parse_acpi_hest_aer(p, hdr->type, pci, &firmware_first);
+ break;
+ case ACPI_HEST_TYPE_GENERIC_ERROR:
+ p += parse_acpi_hest_generic(p);
+ break;
+ /* These should never appear either */
+ case ACPI_HEST_TYPE_RESERVED:
+ default:
+ if (!printed_reserved) {
+ printk(KERN_DEBUG PREFIX
+ "HEST Error Source list contains a reserved type (%d).\n", hdr->type);
+ printed_reserved = 1;
+ }
+ break;
+ }
+ }
+ return firmware_first;
+}
+
+int acpi_hest_firmware_first_pci(struct pci_dev *pci)
+{
+ acpi_status status = AE_NOT_FOUND;
+ struct acpi_table_header *hest = NULL;
+ status = acpi_get_table(ACPI_SIG_HEST, 1, &hest);
+
+ if (ACPI_SUCCESS(status)) {
+ if (acpi_hest_firmware_first(hest, pci)) {
+ return 1;
+ }
+ }
+ return 0;
+}
+EXPORT_SYMBOL_GPL(acpi_hest_firmware_first_pci);