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1/* SPDX-License-Identifier: GPL-2.0 */2#ifndef GHES_H3#define GHES_H4 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/NMI11 * handler.12 *13 * estatus: memory buffer for error status block, allocated during14 * HEST parsing.15 */16#define GHES_EXITING 0x000217 18struct 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 34struct 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 43struct 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 51enum {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_GHES59/**60 * ghes_register_vendor_record_notifier - register a notifier for vendor61 * 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 : FAIL65 */66int ghes_register_vendor_record_notifier(struct notifier_block *nb);67 68/**69 * ghes_unregister_vendor_record_notifier - unregister the previously70 * registered vendor record notifier.71 * @nb: pointer to the notifier_block structure of the vendor record handler.72 */73void ghes_unregister_vendor_record_notifier(struct notifier_block *nb);74 75struct list_head *ghes_get_devices(void);76 77void ghes_estatus_pool_region_free(unsigned long addr, u32 size);78#else79static inline struct list_head *ghes_get_devices(void) { return NULL; }80 81static inline void ghes_estatus_pool_region_free(unsigned long addr, u32 size) { return; }82#endif83 84int ghes_estatus_pool_init(unsigned int num_ghes);85 86static inline int acpi_hest_get_version(struct acpi_hest_generic_data *gdata)87{88 return gdata->revision >> 8;89}90 91static inline void *acpi_hest_get_payload(struct acpi_hest_generic_data *gdata)92{93 if (acpi_hest_get_version(gdata) >= 3)94 return (void *)(((struct acpi_hest_generic_data_v300 *)(gdata)) + 1);95 96 return gdata + 1;97}98 99static inline int acpi_hest_get_error_length(struct acpi_hest_generic_data *gdata)100{101 return ((struct acpi_hest_generic_data *)(gdata))->error_data_length;102}103 104static inline int acpi_hest_get_size(struct acpi_hest_generic_data *gdata)105{106 if (acpi_hest_get_version(gdata) >= 3)107 return sizeof(struct acpi_hest_generic_data_v300);108 109 return sizeof(struct acpi_hest_generic_data);110}111 112static inline int acpi_hest_get_record_size(struct acpi_hest_generic_data *gdata)113{114 return (acpi_hest_get_size(gdata) + acpi_hest_get_error_length(gdata));115}116 117static inline void *acpi_hest_get_next(struct acpi_hest_generic_data *gdata)118{119 return (void *)(gdata) + acpi_hest_get_record_size(gdata);120}121 122#define apei_estatus_for_each_section(estatus, section) \123 for (section = (struct acpi_hest_generic_data *)(estatus + 1); \124 (void *)section - (void *)(estatus + 1) < estatus->data_length; \125 section = acpi_hest_get_next(section))126 127#ifdef CONFIG_ACPI_APEI_SEA128int ghes_notify_sea(void);129#else130static inline int ghes_notify_sea(void) { return -ENOENT; }131#endif132 133struct notifier_block;134extern void ghes_register_report_chain(struct notifier_block *nb);135extern void ghes_unregister_report_chain(struct notifier_block *nb);136#endif /* GHES_H */137