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 | |
18 | struct 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 | |
34 | struct ghes_estatus_node { |
35 | struct llist_node llnode; |
36 | struct acpi_hest_generic *generic; |
37 | struct ghes *ghes; |
38 | |
39 | int task_work_cpu; |
40 | struct callback_head task_work; |
41 | }; |
42 | |
43 | struct ghes_estatus_cache { |
44 | u32 estatus_len; |
45 | atomic_t count; |
46 | struct acpi_hest_generic *generic; |
47 | unsigned long long time_in; |
48 | struct rcu_head rcu; |
49 | }; |
50 | |
51 | enum { |
52 | GHES_SEV_NO = 0x0, |
53 | GHES_SEV_CORRECTED = 0x1, |
54 | GHES_SEV_RECOVERABLE = 0x2, |
55 | GHES_SEV_PANIC = 0x3, |
56 | }; |
57 | |
58 | #ifdef CONFIG_ACPI_APEI_GHES |
59 | /** |
60 | * ghes_register_vendor_record_notifier - register a notifier for vendor |
61 | * records that the kernel would otherwise ignore. |
62 | * @nb: pointer to the notifier_block structure of the event handler. |
63 | * |
64 | * return 0 : SUCCESS, non-zero : FAIL |
65 | */ |
66 | int ghes_register_vendor_record_notifier(struct notifier_block *nb); |
67 | |
68 | /** |
69 | * ghes_unregister_vendor_record_notifier - unregister the previously |
70 | * registered vendor record notifier. |
71 | * @nb: pointer to the notifier_block structure of the vendor record handler. |
72 | */ |
73 | void ghes_unregister_vendor_record_notifier(struct notifier_block *nb); |
74 | |
75 | struct list_head *ghes_get_devices(void); |
76 | |
77 | void ghes_estatus_pool_region_free(unsigned long addr, u32 size); |
78 | #else |
79 | static inline struct list_head *ghes_get_devices(void) { return NULL; } |
80 | |
81 | static inline void ghes_estatus_pool_region_free(unsigned long addr, u32 size) { return; } |
82 | #endif |
83 | |
84 | int ghes_estatus_pool_init(unsigned int num_ghes); |
85 | |
86 | static inline int acpi_hest_get_version(struct acpi_hest_generic_data *gdata) |
87 | { |
88 | return gdata->revision >> 8; |
89 | } |
90 | |
91 | static inline void *acpi_hest_get_payload(struct acpi_hest_generic_data *gdata) |
92 | { |
93 | if (acpi_hest_get_version(gdata) >= 3) |
94 | return (void *)(((struct acpi_hest_generic_data_v300 *)(gdata)) + 1); |
95 | |
96 | return gdata + 1; |
97 | } |
98 | |
99 | static inline int acpi_hest_get_error_length(struct acpi_hest_generic_data *gdata) |
100 | { |
101 | return ((struct acpi_hest_generic_data *)(gdata))->error_data_length; |
102 | } |
103 | |
104 | static inline int acpi_hest_get_size(struct acpi_hest_generic_data *gdata) |
105 | { |
106 | if (acpi_hest_get_version(gdata) >= 3) |
107 | return sizeof(struct acpi_hest_generic_data_v300); |
108 | |
109 | return sizeof(struct acpi_hest_generic_data); |
110 | } |
111 | |
112 | static inline int acpi_hest_get_record_size(struct acpi_hest_generic_data *gdata) |
113 | { |
114 | return (acpi_hest_get_size(gdata) + acpi_hest_get_error_length(gdata)); |
115 | } |
116 | |
117 | static inline void *acpi_hest_get_next(struct acpi_hest_generic_data *gdata) |
118 | { |
119 | return (void *)(gdata) + acpi_hest_get_record_size(gdata); |
120 | } |
121 | |
122 | #define apei_estatus_for_each_section(estatus, section) \ |
123 | for (section = (struct acpi_hest_generic_data *)(estatus + 1); \ |
124 | (void *)section - (void *)(estatus + 1) < estatus->data_length; \ |
125 | section = acpi_hest_get_next(section)) |
126 | |
127 | #ifdef CONFIG_ACPI_APEI_SEA |
128 | int ghes_notify_sea(void); |
129 | #else |
130 | static inline int ghes_notify_sea(void) { return -ENOENT; } |
131 | #endif |
132 | |
133 | struct notifier_block; |
134 | extern void ghes_register_report_chain(struct notifier_block *nb); |
135 | extern void ghes_unregister_report_chain(struct notifier_block *nb); |
136 | #endif /* GHES_H */ |
137 | |