136 строки
3.8 KiB
C
136 строки
3.8 KiB
C
#include <linux/acpi.h>
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#include <linux/pci.h>
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#define PREFIX "ACPI: "
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static inline unsigned long parse_acpi_hest_ia_machine_check(struct acpi_hest_ia_machine_check *p)
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{
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return sizeof(*p) +
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(sizeof(struct acpi_hest_ia_error_bank) * p->num_hardware_banks);
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}
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static inline unsigned long parse_acpi_hest_ia_corrected(struct acpi_hest_ia_corrected *p)
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{
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return sizeof(*p) +
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(sizeof(struct acpi_hest_ia_error_bank) * p->num_hardware_banks);
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}
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static inline unsigned long parse_acpi_hest_ia_nmi(struct acpi_hest_ia_nmi *p)
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{
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return sizeof(*p);
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}
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static inline unsigned long parse_acpi_hest_generic(struct acpi_hest_generic *p)
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{
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return sizeof(*p);
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}
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static inline unsigned int hest_match_pci(struct acpi_hest_aer_common *p, struct pci_dev *pci)
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{
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return (0 == pci_domain_nr(pci->bus) &&
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p->bus == pci->bus->number &&
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p->device == PCI_SLOT(pci->devfn) &&
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p->function == PCI_FUNC(pci->devfn));
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}
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static unsigned long parse_acpi_hest_aer(void *hdr, int type, struct pci_dev *pci, int *firmware_first)
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{
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struct acpi_hest_aer_common *p = hdr + sizeof(struct acpi_hest_header);
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unsigned long rc=0;
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u8 pcie_type = 0;
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u8 bridge = 0;
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switch (type) {
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case ACPI_HEST_TYPE_AER_ROOT_PORT:
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rc = sizeof(struct acpi_hest_aer_root);
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pcie_type = PCI_EXP_TYPE_ROOT_PORT;
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break;
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case ACPI_HEST_TYPE_AER_ENDPOINT:
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rc = sizeof(struct acpi_hest_aer);
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pcie_type = PCI_EXP_TYPE_ENDPOINT;
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break;
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case ACPI_HEST_TYPE_AER_BRIDGE:
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rc = sizeof(struct acpi_hest_aer_bridge);
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if ((pci->class >> 16) == PCI_BASE_CLASS_BRIDGE)
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bridge = 1;
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break;
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}
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if (p->flags & ACPI_HEST_GLOBAL) {
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if ((pci->is_pcie && (pci->pcie_type == pcie_type)) || bridge)
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*firmware_first = !!(p->flags & ACPI_HEST_FIRMWARE_FIRST);
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}
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else
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if (hest_match_pci(p, pci))
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*firmware_first = !!(p->flags & ACPI_HEST_FIRMWARE_FIRST);
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return rc;
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}
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static int acpi_hest_firmware_first(struct acpi_table_header *stdheader, struct pci_dev *pci)
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{
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struct acpi_table_hest *hest = (struct acpi_table_hest *)stdheader;
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void *p = (void *)hest + sizeof(*hest); /* defined by the ACPI 4.0 spec */
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struct acpi_hest_header *hdr = p;
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int i;
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int firmware_first = 0;
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static unsigned char printed_unused = 0;
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static unsigned char printed_reserved = 0;
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for (i=0, hdr=p; p < (((void *)hest) + hest->header.length) && i < hest->error_source_count; i++) {
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switch (hdr->type) {
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case ACPI_HEST_TYPE_IA32_CHECK:
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p += parse_acpi_hest_ia_machine_check(p);
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break;
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case ACPI_HEST_TYPE_IA32_CORRECTED_CHECK:
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p += parse_acpi_hest_ia_corrected(p);
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break;
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case ACPI_HEST_TYPE_IA32_NMI:
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p += parse_acpi_hest_ia_nmi(p);
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break;
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/* These three should never appear */
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case ACPI_HEST_TYPE_NOT_USED3:
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case ACPI_HEST_TYPE_NOT_USED4:
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case ACPI_HEST_TYPE_NOT_USED5:
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if (!printed_unused) {
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printk(KERN_DEBUG PREFIX
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"HEST Error Source list contains an obsolete type (%d).\n", hdr->type);
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printed_unused = 1;
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}
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break;
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case ACPI_HEST_TYPE_AER_ROOT_PORT:
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case ACPI_HEST_TYPE_AER_ENDPOINT:
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case ACPI_HEST_TYPE_AER_BRIDGE:
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p += parse_acpi_hest_aer(p, hdr->type, pci, &firmware_first);
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break;
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case ACPI_HEST_TYPE_GENERIC_ERROR:
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p += parse_acpi_hest_generic(p);
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break;
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/* These should never appear either */
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case ACPI_HEST_TYPE_RESERVED:
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default:
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if (!printed_reserved) {
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printk(KERN_DEBUG PREFIX
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"HEST Error Source list contains a reserved type (%d).\n", hdr->type);
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printed_reserved = 1;
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}
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break;
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}
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}
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return firmware_first;
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}
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int acpi_hest_firmware_first_pci(struct pci_dev *pci)
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{
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acpi_status status = AE_NOT_FOUND;
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struct acpi_table_header *hest = NULL;
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status = acpi_get_table(ACPI_SIG_HEST, 1, &hest);
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if (ACPI_SUCCESS(status)) {
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if (acpi_hest_firmware_first(hest, pci)) {
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return 1;
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}
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}
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return 0;
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}
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EXPORT_SYMBOL_GPL(acpi_hest_firmware_first_pci);
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