projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 6c2b374d ZY |
1 | /* |
| 2 | * Access ACPI _OSC method | |
| 3 | * | |
| 4 | * Copyright (C) 2006 Intel Corp. | |
| 5 | * Tom Long Nguyen (tom.l.nguyen@intel.com) | |
| 6 | * Zhang Yanmin (yanmin.zhang@intel.com) | |
| 7 | * | |
| 8 | */ | |
| 9 | ||
| 10 | #include <linux/module.h> | |
| 11 | #include <linux/pci.h> | |
| 12 | #include <linux/kernel.h> | |
| 13 | #include <linux/errno.h> | |
| 14 | #include <linux/pm.h> | |
| 15 | #include <linux/suspend.h> | |
| 16 | #include <linux/acpi.h> | |
| 17 | #include <linux/pci-acpi.h> | |
| 18 | #include <linux/delay.h> | |
| affb72c3 | 19 | #include <acpi/apei.h> |
| 6c2b374d ZY |
20 | #include "aerdrv.h" |
| 21 | ||
| affb72c3 HY |
22 | #ifdef CONFIG_ACPI_APEI |
| 23 | static inline int hest_match_pci(struct acpi_hest_aer_common *p, | |
| 24 | struct pci_dev *pci) | |
| 25 | { | |
| 26 | return (0 == pci_domain_nr(pci->bus) && | |
| 27 | p->bus == pci->bus->number && | |
| 28 | p->device == PCI_SLOT(pci->devfn) && | |
| 29 | p->function == PCI_FUNC(pci->devfn)); | |
| 30 | } | |
| 31 | ||
| 32 | struct aer_hest_parse_info { | |
| 33 | struct pci_dev *pci_dev; | |
| 34 | int firmware_first; | |
| 35 | }; | |
| 36 | ||
| 37 | static int aer_hest_parse(struct acpi_hest_header *hest_hdr, void *data) | |
| 38 | { | |
| 39 | struct aer_hest_parse_info *info = data; | |
| 40 | struct acpi_hest_aer_common *p; | |
| 41 | u8 pcie_type = 0; | |
| 42 | u8 bridge = 0; | |
| 43 | int ff = 0; | |
| 44 | ||
| 45 | switch (hest_hdr->type) { | |
| 46 | case ACPI_HEST_TYPE_AER_ROOT_PORT: | |
| 47 | pcie_type = PCI_EXP_TYPE_ROOT_PORT; | |
| 48 | break; | |
| 49 | case ACPI_HEST_TYPE_AER_ENDPOINT: | |
| 50 | pcie_type = PCI_EXP_TYPE_ENDPOINT; | |
| 51 | break; | |
| 52 | case ACPI_HEST_TYPE_AER_BRIDGE: | |
| 53 | if ((info->pci_dev->class >> 16) == PCI_BASE_CLASS_BRIDGE) | |
| 54 | bridge = 1; | |
| 55 | break; | |
| 56 | default: | |
| 57 | return 0; | |
| 58 | } | |
| 59 | ||
| 60 | p = (struct acpi_hest_aer_common *)(hest_hdr + 1); | |
| 61 | if (p->flags & ACPI_HEST_GLOBAL) { | |
| 505cf30b | 62 | if ((pci_is_pcie(info->pci_dev) && |
| 62f87c0e | 63 | pci_pcie_type(info->pci_dev) == pcie_type) || bridge) |
| affb72c3 HY |
64 | ff = !!(p->flags & ACPI_HEST_FIRMWARE_FIRST); |
| 65 | } else | |
| 66 | if (hest_match_pci(p, info->pci_dev)) | |
| 67 | ff = !!(p->flags & ACPI_HEST_FIRMWARE_FIRST); | |
| 68 | info->firmware_first = ff; | |
| 69 | ||
| 70 | return 0; | |
| 71 | } | |
| 72 | ||
| 73 | static void aer_set_firmware_first(struct pci_dev *pci_dev) | |
| 74 | { | |
| 75 | int rc; | |
| 76 | struct aer_hest_parse_info info = { | |
| 77 | .pci_dev = pci_dev, | |
| 78 | .firmware_first = 0, | |
| 79 | }; | |
| 80 | ||
| 81 | rc = apei_hest_parse(aer_hest_parse, &info); | |
| 82 | ||
| 83 | if (rc) | |
| 84 | pci_dev->__aer_firmware_first = 0; | |
| 85 | else | |
| 86 | pci_dev->__aer_firmware_first = info.firmware_first; | |
| 87 | pci_dev->__aer_firmware_first_valid = 1; | |
| 88 | } | |
| 89 | ||
| 90 | int pcie_aer_get_firmware_first(struct pci_dev *dev) | |
| 91 | { | |
| 92 | if (!dev->__aer_firmware_first_valid) | |
| 93 | aer_set_firmware_first(dev); | |
| 94 | return dev->__aer_firmware_first; | |
| 95 | } | |
| b22c3d82 RW |
96 | |
| 97 | static bool aer_firmware_first; | |
| 98 | ||
| 99 | static int aer_hest_parse_aff(struct acpi_hest_header *hest_hdr, void *data) | |
| 100 | { | |
| 101 | struct acpi_hest_aer_common *p; | |
| 102 | ||
| 103 | if (aer_firmware_first) | |
| 104 | return 0; | |
| 105 | ||
| 106 | switch (hest_hdr->type) { | |
| 107 | case ACPI_HEST_TYPE_AER_ROOT_PORT: | |
| 108 | case ACPI_HEST_TYPE_AER_ENDPOINT: | |
| 109 | case ACPI_HEST_TYPE_AER_BRIDGE: | |
| 110 | p = (struct acpi_hest_aer_common *)(hest_hdr + 1); | |
| 111 | aer_firmware_first = !!(p->flags & ACPI_HEST_FIRMWARE_FIRST); | |
| 112 | default: | |
| 113 | return 0; | |
| 114 | } | |
| 115 | } | |
| 116 | ||
| 117 | /** | |
| 118 | * aer_acpi_firmware_first - Check if APEI should control AER. | |
| 119 | */ | |
| 120 | bool aer_acpi_firmware_first(void) | |
| 121 | { | |
| 122 | static bool parsed = false; | |
| 123 | ||
| 124 | if (!parsed) { | |
| 125 | apei_hest_parse(aer_hest_parse_aff, NULL); | |
| 126 | parsed = true; | |
| 127 | } | |
| 128 | return aer_firmware_first; | |
| 129 | } | |
| affb72c3 | 130 | #endif |