| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | #ifndef GHES_H |
| 3 | #define GHES_H |
| 4 | |
| 5 | #include <acpi/apei.h> |
| 6 | #include <acpi/hed.h> |
| 7 | |
| 8 | /* |
| 9 | * One struct ghes is created for each generic hardware error source. |
| 10 | * It provides the context for APEI hardware error timer/IRQ/SCI/NMI |
| 11 | * handler. |
| 12 | * |
| 13 | * estatus: memory buffer for error status block, allocated during |
| 14 | * HEST parsing. |
| 15 | */ |
| 16 | #define GHES_EXITING 0x0002 |
| 17 | |
| 18 | struct ghes { |
| 19 | union { |
| 20 | struct acpi_hest_generic *generic; |
| 21 | struct acpi_hest_generic_v2 *generic_v2; |
| 22 | }; |
| 23 | struct acpi_hest_generic_status *estatus; |
| 24 | unsigned long flags; |
| 25 | union { |
| 26 | struct list_head list; |
| 27 | struct timer_list timer; |
| 28 | unsigned int irq; |
| 29 | }; |
| 30 | struct device *dev; |
| 31 | struct list_head elist; |
| 32 | }; |
| 33 | |
| 34 | struct ghes_estatus_node { |
| 35 | struct llist_node llnode; |
| 36 | struct acpi_hest_generic *generic; |
| 37 | struct ghes *ghes; |
| 38 | |
| 39 | int task_work_cpu; |
| 40 | struct callback_head task_work; |
| 41 | }; |
| 42 | |
| 43 | struct ghes_estatus_cache { |
| 44 | u32 estatus_len; |
| 45 | atomic_t count; |
| 46 | struct acpi_hest_generic *generic; |
| 47 | unsigned long long time_in; |
| 48 | struct rcu_head rcu; |
| 49 | }; |
| 50 | |
| 51 | enum { |
| 52 | GHES_SEV_NO = 0x0, |
| 53 | GHES_SEV_CORRECTED = 0x1, |
| 54 | GHES_SEV_RECOVERABLE = 0x2, |
| 55 | GHES_SEV_PANIC = 0x3, |
| 56 | }; |
| 57 | |
| 58 | #ifdef CONFIG_ACPI_APEI_GHES |
| 59 | /** |
| 60 | * ghes_register_vendor_record_notifier - register a notifier for vendor |
| 61 | * records that the kernel would otherwise ignore. |
| 62 | * @nb: pointer to the notifier_block structure of the event handler. |
| 63 | * |
| 64 | * return 0 : SUCCESS, non-zero : FAIL |
| 65 | */ |
| 66 | int ghes_register_vendor_record_notifier(struct notifier_block *nb); |
| 67 | |
| 68 | /** |
| 69 | * ghes_unregister_vendor_record_notifier - unregister the previously |
| 70 | * registered vendor record notifier. |
| 71 | * @nb: pointer to the notifier_block structure of the vendor record handler. |
| 72 | */ |
| 73 | void ghes_unregister_vendor_record_notifier(struct notifier_block *nb); |
| 74 | |
| 75 | struct list_head *ghes_get_devices(void); |
| 76 | #else |
| 77 | static inline struct list_head *ghes_get_devices(void) { return NULL; } |
| 78 | #endif |
| 79 | |
| 80 | int ghes_estatus_pool_init(unsigned int num_ghes); |
| 81 | |
| 82 | static inline int acpi_hest_get_version(struct acpi_hest_generic_data *gdata) |
| 83 | { |
| 84 | return gdata->revision >> 8; |
| 85 | } |
| 86 | |
| 87 | static inline void *acpi_hest_get_payload(struct acpi_hest_generic_data *gdata) |
| 88 | { |
| 89 | if (acpi_hest_get_version(gdata) >= 3) |
| 90 | return (void *)(((struct acpi_hest_generic_data_v300 *)(gdata)) + 1); |
| 91 | |
| 92 | return gdata + 1; |
| 93 | } |
| 94 | |
| 95 | static inline int acpi_hest_get_error_length(struct acpi_hest_generic_data *gdata) |
| 96 | { |
| 97 | return ((struct acpi_hest_generic_data *)(gdata))->error_data_length; |
| 98 | } |
| 99 | |
| 100 | static inline int acpi_hest_get_size(struct acpi_hest_generic_data *gdata) |
| 101 | { |
| 102 | if (acpi_hest_get_version(gdata) >= 3) |
| 103 | return sizeof(struct acpi_hest_generic_data_v300); |
| 104 | |
| 105 | return sizeof(struct acpi_hest_generic_data); |
| 106 | } |
| 107 | |
| 108 | static inline int acpi_hest_get_record_size(struct acpi_hest_generic_data *gdata) |
| 109 | { |
| 110 | return (acpi_hest_get_size(gdata) + acpi_hest_get_error_length(gdata)); |
| 111 | } |
| 112 | |
| 113 | static inline void *acpi_hest_get_next(struct acpi_hest_generic_data *gdata) |
| 114 | { |
| 115 | return (void *)(gdata) + acpi_hest_get_record_size(gdata); |
| 116 | } |
| 117 | |
| 118 | #define apei_estatus_for_each_section(estatus, section) \ |
| 119 | for (section = (struct acpi_hest_generic_data *)(estatus + 1); \ |
| 120 | (void *)section - (void *)(estatus + 1) < estatus->data_length; \ |
| 121 | section = acpi_hest_get_next(section)) |
| 122 | |
| 123 | #ifdef CONFIG_ACPI_APEI_SEA |
| 124 | int ghes_notify_sea(void); |
| 125 | #else |
| 126 | static inline int ghes_notify_sea(void) { return -ENOENT; } |
| 127 | #endif |
| 128 | |
| 129 | struct notifier_block; |
| 130 | extern void ghes_register_report_chain(struct notifier_block *nb); |
| 131 | extern void ghes_unregister_report_chain(struct notifier_block *nb); |
| 132 | #endif /* GHES_H */ |