Linux kernel mirror (for testing)
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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 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
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#ifdef CONFIG_ACPI_APEI_GHES
56/**
57 * ghes_register_vendor_record_notifier - register a notifier for vendor
58 * records that the kernel would otherwise ignore.
59 * @nb: pointer to the notifier_block structure of the event handler.
60 *
61 * return 0 : SUCCESS, non-zero : FAIL
62 */
63int ghes_register_vendor_record_notifier(struct notifier_block *nb);
64
65/**
66 * ghes_unregister_vendor_record_notifier - unregister the previously
67 * registered vendor record notifier.
68 * @nb: pointer to the notifier_block structure of the vendor record handler.
69 */
70void ghes_unregister_vendor_record_notifier(struct notifier_block *nb);
71
72struct list_head *ghes_get_devices(void);
73
74void ghes_estatus_pool_region_free(unsigned long addr, u32 size);
75#else
76static inline struct list_head *ghes_get_devices(void) { return NULL; }
77
78static inline void ghes_estatus_pool_region_free(unsigned long addr, u32 size) { return; }
79#endif
80
81int ghes_estatus_pool_init(unsigned int num_ghes);
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
130struct notifier_block;
131extern void ghes_register_report_chain(struct notifier_block *nb);
132extern void ghes_unregister_report_chain(struct notifier_block *nb);
133#endif /* GHES_H */