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