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 }; 31 32 struct ghes_estatus_node { 33 struct llist_node llnode; 34 struct acpi_hest_generic *generic; 35 struct ghes *ghes; 36 37 int task_work_cpu; 38 struct callback_head task_work; 39 }; 40 41 struct ghes_estatus_cache { 42 u32 estatus_len; 43 atomic_t count; 44 struct acpi_hest_generic *generic; 45 unsigned long long time_in; 46 struct rcu_head rcu; 47 }; 48 49 enum { 50 GHES_SEV_NO = 0x0, 51 GHES_SEV_CORRECTED = 0x1, 52 GHES_SEV_RECOVERABLE = 0x2, 53 GHES_SEV_PANIC = 0x3, 54 }; 55 56 int ghes_estatus_pool_init(int num_ghes); 57 58 /* From drivers/edac/ghes_edac.c */ 59 60 #ifdef CONFIG_EDAC_GHES 61 void ghes_edac_report_mem_error(int sev, struct cper_sec_mem_err *mem_err); 62 63 int ghes_edac_register(struct ghes *ghes, struct device *dev); 64 65 void ghes_edac_unregister(struct ghes *ghes); 66 67 #else 68 static inline void ghes_edac_report_mem_error(int sev, 69 struct cper_sec_mem_err *mem_err) 70 { 71 } 72 73 static inline int ghes_edac_register(struct ghes *ghes, struct device *dev) 74 { 75 return -ENODEV; 76 } 77 78 static inline void ghes_edac_unregister(struct ghes *ghes) 79 { 80 } 81 #endif 82 83 static inline int acpi_hest_get_version(struct acpi_hest_generic_data *gdata) 84 { 85 return gdata->revision >> 8; 86 } 87 88 static inline void *acpi_hest_get_payload(struct acpi_hest_generic_data *gdata) 89 { 90 if (acpi_hest_get_version(gdata) >= 3) 91 return (void *)(((struct acpi_hest_generic_data_v300 *)(gdata)) + 1); 92 93 return gdata + 1; 94 } 95 96 static inline int acpi_hest_get_error_length(struct acpi_hest_generic_data *gdata) 97 { 98 return ((struct acpi_hest_generic_data *)(gdata))->error_data_length; 99 } 100 101 static inline int acpi_hest_get_size(struct acpi_hest_generic_data *gdata) 102 { 103 if (acpi_hest_get_version(gdata) >= 3) 104 return sizeof(struct acpi_hest_generic_data_v300); 105 106 return sizeof(struct acpi_hest_generic_data); 107 } 108 109 static inline int acpi_hest_get_record_size(struct acpi_hest_generic_data *gdata) 110 { 111 return (acpi_hest_get_size(gdata) + acpi_hest_get_error_length(gdata)); 112 } 113 114 static inline void *acpi_hest_get_next(struct acpi_hest_generic_data *gdata) 115 { 116 return (void *)(gdata) + acpi_hest_get_record_size(gdata); 117 } 118 119 #define apei_estatus_for_each_section(estatus, section) \ 120 for (section = (struct acpi_hest_generic_data *)(estatus + 1); \ 121 (void *)section - (void *)(estatus + 1) < estatus->data_length; \ 122 section = acpi_hest_get_next(section)) 123 124 #ifdef CONFIG_ACPI_APEI_SEA 125 int ghes_notify_sea(void); 126 #else 127 static inline int ghes_notify_sea(void) { return -ENOENT; } 128 #endif 129 130 #endif /* GHES_H */ 131