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_TO_CLEAR		0x0001
 17#define GHES_EXITING		0x0002
 18
 19struct ghes {
 20	union {
 21		struct acpi_hest_generic *generic;
 22		struct acpi_hest_generic_v2 *generic_v2;
 23	};
 24	struct acpi_hest_generic_status *estatus;
 25	u64 buffer_paddr;
 26	unsigned long flags;
 27	union {
 28		struct list_head list;
 29		struct timer_list timer;
 30		unsigned int irq;
 31	};
 32};
 33
 34struct ghes_estatus_node {
 35	struct llist_node llnode;
 36	struct acpi_hest_generic *generic;
 37	struct ghes *ghes;
 38};
 39
 40struct ghes_estatus_cache {
 41	u32 estatus_len;
 42	atomic_t count;
 43	struct acpi_hest_generic *generic;
 44	unsigned long long time_in;
 45	struct rcu_head rcu;
 46};
 47
 48enum {
 49	GHES_SEV_NO = 0x0,
 50	GHES_SEV_CORRECTED = 0x1,
 51	GHES_SEV_RECOVERABLE = 0x2,
 52	GHES_SEV_PANIC = 0x3,
 53};
 54
 55/* From drivers/edac/ghes_edac.c */
 56
 57#ifdef CONFIG_EDAC_GHES
 58void ghes_edac_report_mem_error(struct ghes *ghes, int sev,
 59				struct cper_sec_mem_err *mem_err);
 60
 61int ghes_edac_register(struct ghes *ghes, struct device *dev);
 62
 63void ghes_edac_unregister(struct ghes *ghes);
 64
 65#else
 66static inline void ghes_edac_report_mem_error(struct ghes *ghes, int sev,
 67				       struct cper_sec_mem_err *mem_err)
 68{
 69}
 70
 71static inline int ghes_edac_register(struct ghes *ghes, struct device *dev)
 72{
 73	return 0;
 74}
 75
 76static inline void ghes_edac_unregister(struct ghes *ghes)
 77{
 78}
 79#endif
 80
 81static inline int acpi_hest_get_version(struct acpi_hest_generic_data *gdata)
 82{
 83	return gdata->revision >> 8;
 84}
 85
 86static inline void *acpi_hest_get_payload(struct acpi_hest_generic_data *gdata)
 87{
 88	if (acpi_hest_get_version(gdata) >= 3)
 89		return (void *)(((struct acpi_hest_generic_data_v300 *)(gdata)) + 1);
 90
 91	return gdata + 1;
 92}
 93
 94static inline int acpi_hest_get_error_length(struct acpi_hest_generic_data *gdata)
 95{
 96	return ((struct acpi_hest_generic_data *)(gdata))->error_data_length;
 97}
 98
 99static inline int acpi_hest_get_size(struct acpi_hest_generic_data *gdata)
100{
101	if (acpi_hest_get_version(gdata) >= 3)
102		return sizeof(struct acpi_hest_generic_data_v300);
103
104	return sizeof(struct acpi_hest_generic_data);
105}
106
107static inline int acpi_hest_get_record_size(struct acpi_hest_generic_data *gdata)
108{
109	return (acpi_hest_get_size(gdata) + acpi_hest_get_error_length(gdata));
110}
111
112static inline void *acpi_hest_get_next(struct acpi_hest_generic_data *gdata)
113{
114	return (void *)(gdata) + acpi_hest_get_record_size(gdata);
115}
116
117#define apei_estatus_for_each_section(estatus, section)			\
118	for (section = (struct acpi_hest_generic_data *)(estatus + 1);	\
119	     (void *)section - (void *)(estatus + 1) < estatus->data_length; \
120	     section = acpi_hest_get_next(section))
121
122int ghes_notify_sea(void);
123
124#endif /* GHES_H */