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 */
128