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
 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};
 31
 32struct 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
 41struct 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
 49enum {
 50	GHES_SEV_NO = 0x0,
 51	GHES_SEV_CORRECTED = 0x1,
 52	GHES_SEV_RECOVERABLE = 0x2,
 53	GHES_SEV_PANIC = 0x3,
 54};
 55
 56int ghes_estatus_pool_init(int num_ghes);
 57
 58/* From drivers/edac/ghes_edac.c */
 59
 60#ifdef CONFIG_EDAC_GHES
 61void ghes_edac_report_mem_error(int sev, struct cper_sec_mem_err *mem_err);
 62
 63int ghes_edac_register(struct ghes *ghes, struct device *dev);
 64
 65void ghes_edac_unregister(struct ghes *ghes);
 66
 67#else
 68static inline void ghes_edac_report_mem_error(int sev,
 69				       struct cper_sec_mem_err *mem_err)
 70{
 71}
 72
 73static inline int ghes_edac_register(struct ghes *ghes, struct device *dev)
 74{
 75	return -ENODEV;
 76}
 77
 78static inline void ghes_edac_unregister(struct ghes *ghes)
 79{
 80}
 81#endif
 82
 83static inline int acpi_hest_get_version(struct acpi_hest_generic_data *gdata)
 84{
 85	return gdata->revision >> 8;
 86}
 87
 88static 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
 96static 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
101static 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
109static 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
114static 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
125int ghes_notify_sea(void);
126#else
127static inline int ghes_notify_sea(void) { return -ENOENT; }
128#endif
129
130#endif /* GHES_H */