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
 38struct 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
 46enum {
 47	GHES_SEV_NO = 0x0,
 48	GHES_SEV_CORRECTED = 0x1,
 49	GHES_SEV_RECOVERABLE = 0x2,
 50	GHES_SEV_PANIC = 0x3,
 51};
 52
 53int ghes_estatus_pool_init(int num_ghes);
 54
 55/* From drivers/edac/ghes_edac.c */
 56
 57#ifdef CONFIG_EDAC_GHES
 58void ghes_edac_report_mem_error(int sev, struct cper_sec_mem_err *mem_err);
 59
 60int ghes_edac_register(struct ghes *ghes, struct device *dev);
 61
 62void ghes_edac_unregister(struct ghes *ghes);
 63
 64#else
 65static inline void ghes_edac_report_mem_error(int sev,
 66				       struct cper_sec_mem_err *mem_err)
 67{
 68}
 69
 70static inline int ghes_edac_register(struct ghes *ghes, struct device *dev)
 71{
 72	return -ENODEV;
 73}
 74
 75static inline void ghes_edac_unregister(struct ghes *ghes)
 76{
 77}
 78#endif
 79
 80static inline int acpi_hest_get_version(struct acpi_hest_generic_data *gdata)
 81{
 82	return gdata->revision >> 8;
 83}
 84
 85static 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
 93static 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
 98static 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
106static 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
111static 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
122int ghes_notify_sea(void);
123#else
124static inline int ghes_notify_sea(void) { return -ENOENT; }
125#endif
126
127#endif /* GHES_H */