1 /* SPDX-License-Identifier: GPL-2.0 */ 1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef GHES_H 2 #ifndef GHES_H
3 #define GHES_H 3 #define GHES_H
4 4
5 #include <acpi/apei.h> 5 #include <acpi/apei.h>
6 #include <acpi/hed.h> 6 #include <acpi/hed.h>
7 7
8 /* 8 /*
9 * One struct ghes is created for each generic 9 * One struct ghes is created for each generic hardware error source.
10 * It provides the context for APEI hardware e 10 * It provides the context for APEI hardware error timer/IRQ/SCI/NMI
11 * handler. 11 * handler.
12 * 12 *
13 * estatus: memory buffer for error status blo 13 * estatus: memory buffer for error status block, allocated during
14 * HEST parsing. 14 * HEST parsing.
15 */ 15 */
16 #define GHES_EXITING 0x0002 16 #define GHES_EXITING 0x0002
17 17
18 struct ghes { 18 struct ghes {
19 union { 19 union {
20 struct acpi_hest_generic *gene 20 struct acpi_hest_generic *generic;
21 struct acpi_hest_generic_v2 *g 21 struct acpi_hest_generic_v2 *generic_v2;
22 }; 22 };
23 struct acpi_hest_generic_status *estat 23 struct acpi_hest_generic_status *estatus;
24 unsigned long flags; 24 unsigned long flags;
25 union { 25 union {
26 struct list_head list; 26 struct list_head list;
27 struct timer_list timer; 27 struct timer_list timer;
28 unsigned int irq; 28 unsigned int irq;
29 }; 29 };
30 struct device *dev; 30 struct device *dev;
31 struct list_head elist; 31 struct list_head elist;
32 }; 32 };
33 33
34 struct ghes_estatus_node { 34 struct ghes_estatus_node {
35 struct llist_node llnode; 35 struct llist_node llnode;
36 struct acpi_hest_generic *generic; 36 struct acpi_hest_generic *generic;
37 struct ghes *ghes; 37 struct ghes *ghes;
38 38
39 int task_work_cpu; 39 int task_work_cpu;
40 struct callback_head task_work; 40 struct callback_head task_work;
41 }; 41 };
42 42
43 struct ghes_estatus_cache { 43 struct ghes_estatus_cache {
44 u32 estatus_len; 44 u32 estatus_len;
45 atomic_t count; 45 atomic_t count;
46 struct acpi_hest_generic *generic; 46 struct acpi_hest_generic *generic;
47 unsigned long long time_in; 47 unsigned long long time_in;
48 struct rcu_head rcu; 48 struct rcu_head rcu;
49 }; 49 };
50 50
51 enum { 51 enum {
52 GHES_SEV_NO = 0x0, 52 GHES_SEV_NO = 0x0,
53 GHES_SEV_CORRECTED = 0x1, 53 GHES_SEV_CORRECTED = 0x1,
54 GHES_SEV_RECOVERABLE = 0x2, 54 GHES_SEV_RECOVERABLE = 0x2,
55 GHES_SEV_PANIC = 0x3, 55 GHES_SEV_PANIC = 0x3,
56 }; 56 };
57 57
58 #ifdef CONFIG_ACPI_APEI_GHES 58 #ifdef CONFIG_ACPI_APEI_GHES
59 /** 59 /**
60 * ghes_register_vendor_record_notifier - regi 60 * ghes_register_vendor_record_notifier - register a notifier for vendor
61 * records that the kernel would otherwise ign 61 * records that the kernel would otherwise ignore.
62 * @nb: pointer to the notifier_block structur 62 * @nb: pointer to the notifier_block structure of the event handler.
63 * 63 *
64 * return 0 : SUCCESS, non-zero : FAIL 64 * return 0 : SUCCESS, non-zero : FAIL
65 */ 65 */
66 int ghes_register_vendor_record_notifier(struc 66 int ghes_register_vendor_record_notifier(struct notifier_block *nb);
67 67
68 /** 68 /**
69 * ghes_unregister_vendor_record_notifier - un 69 * ghes_unregister_vendor_record_notifier - unregister the previously
70 * registered vendor record notifier. 70 * registered vendor record notifier.
71 * @nb: pointer to the notifier_block structur 71 * @nb: pointer to the notifier_block structure of the vendor record handler.
72 */ 72 */
73 void ghes_unregister_vendor_record_notifier(st 73 void ghes_unregister_vendor_record_notifier(struct notifier_block *nb);
74 74
75 struct list_head *ghes_get_devices(void); 75 struct list_head *ghes_get_devices(void);
76 76
77 void ghes_estatus_pool_region_free(unsigned lo 77 void ghes_estatus_pool_region_free(unsigned long addr, u32 size);
78 #else 78 #else
79 static inline struct list_head *ghes_get_devic 79 static inline struct list_head *ghes_get_devices(void) { return NULL; }
80 80
81 static inline void ghes_estatus_pool_region_fr 81 static inline void ghes_estatus_pool_region_free(unsigned long addr, u32 size) { return; }
82 #endif 82 #endif
83 83
84 int ghes_estatus_pool_init(unsigned int num_gh 84 int ghes_estatus_pool_init(unsigned int num_ghes);
85 85
86 static inline int acpi_hest_get_version(struct 86 static inline int acpi_hest_get_version(struct acpi_hest_generic_data *gdata)
87 { 87 {
88 return gdata->revision >> 8; 88 return gdata->revision >> 8;
89 } 89 }
90 90
91 static inline void *acpi_hest_get_payload(stru 91 static inline void *acpi_hest_get_payload(struct acpi_hest_generic_data *gdata)
92 { 92 {
93 if (acpi_hest_get_version(gdata) >= 3) 93 if (acpi_hest_get_version(gdata) >= 3)
94 return (void *)(((struct acpi_ 94 return (void *)(((struct acpi_hest_generic_data_v300 *)(gdata)) + 1);
95 95
96 return gdata + 1; 96 return gdata + 1;
97 } 97 }
98 98
99 static inline int acpi_hest_get_error_length(s 99 static inline int acpi_hest_get_error_length(struct acpi_hest_generic_data *gdata)
100 { 100 {
101 return ((struct acpi_hest_generic_data 101 return ((struct acpi_hest_generic_data *)(gdata))->error_data_length;
102 } 102 }
103 103
104 static inline int acpi_hest_get_size(struct ac 104 static inline int acpi_hest_get_size(struct acpi_hest_generic_data *gdata)
105 { 105 {
106 if (acpi_hest_get_version(gdata) >= 3) 106 if (acpi_hest_get_version(gdata) >= 3)
107 return sizeof(struct acpi_hest 107 return sizeof(struct acpi_hest_generic_data_v300);
108 108
109 return sizeof(struct acpi_hest_generic 109 return sizeof(struct acpi_hest_generic_data);
110 } 110 }
111 111
112 static inline int acpi_hest_get_record_size(st 112 static inline int acpi_hest_get_record_size(struct acpi_hest_generic_data *gdata)
113 { 113 {
114 return (acpi_hest_get_size(gdata) + ac 114 return (acpi_hest_get_size(gdata) + acpi_hest_get_error_length(gdata));
115 } 115 }
116 116
117 static inline void *acpi_hest_get_next(struct 117 static inline void *acpi_hest_get_next(struct acpi_hest_generic_data *gdata)
118 { 118 {
119 return (void *)(gdata) + acpi_hest_get 119 return (void *)(gdata) + acpi_hest_get_record_size(gdata);
120 } 120 }
121 121
122 #define apei_estatus_for_each_section(estatus, 122 #define apei_estatus_for_each_section(estatus, section) \
123 for (section = (struct acpi_hest_gener 123 for (section = (struct acpi_hest_generic_data *)(estatus + 1); \
124 (void *)section - (void *)(estatu 124 (void *)section - (void *)(estatus + 1) < estatus->data_length; \
125 section = acpi_hest_get_next(sect 125 section = acpi_hest_get_next(section))
126 126
127 #ifdef CONFIG_ACPI_APEI_SEA 127 #ifdef CONFIG_ACPI_APEI_SEA
128 int ghes_notify_sea(void); 128 int ghes_notify_sea(void);
129 #else 129 #else
130 static inline int ghes_notify_sea(void) { retu 130 static inline int ghes_notify_sea(void) { return -ENOENT; }
131 #endif 131 #endif
132 132
133 struct notifier_block; 133 struct notifier_block;
134 extern void ghes_register_report_chain(struct 134 extern void ghes_register_report_chain(struct notifier_block *nb);
135 extern void ghes_unregister_report_chain(struc 135 extern void ghes_unregister_report_chain(struct notifier_block *nb);
136 #endif /* GHES_H */ 136 #endif /* GHES_H */
137 137
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